summaryrefslogtreecommitdiff
path: root/imap/src/imapd/imapd.c
blob: 1c1d40114d5b673c4573743481fcfc044c0fcd77 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
/* ========================================================================
 * Copyright 2008-2011 Mark Crispin
 * ========================================================================
 */

/*
 * Program:	IMAP4rev1 server
 *
 * Author:	Mark Crispin
 *
 * Date:	5 November 1990
 * Last Edited:	30 July 2011
 *
 * Previous versions of this file were
 *
 * Copyright 1988-2008 University of Washington
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 */

/* Parameter files */

#include <stdio.h>
#include <ctype.h>
#include <errno.h>
extern int errno;		/* just in case */
#include <signal.h>
#include <setjmp.h>
#include <time.h>
#include <limits.h>
#include "c-client.h"
#include "newsrc.h"
#include <sys/stat.h>


#define CRLF PSOUT ("\015\012")	/* primary output terpri */


/* Timeouts and timers */

#define MINUTES *60

#define LOGINTIMEOUT 3 MINUTES	/* not logged in autologout timer */
#define TIMEOUT 30 MINUTES	/* RFC 3501 minimum autologout timer */
#define INPUTTIMEOUT 5 MINUTES	/* timer for additional command input */
#define ALERTTIMER 1 MINUTES	/* alert check timer */
#define SHUTDOWNTIMER 1 MINUTES	/* shutdown dally timer */
#define IDLETIMER 1 MINUTES	/* IDLE command poll timer */
#define CHECKTIMER 5 MINUTES	/* IDLE command last checkpoint timer */
#define SIGNALTIMER 10 MINUTES	/* allocated time to die at signal */


#define MAXNLIBADCOMMAND 3	/* limit on number of NLI bad commands */
#define MAXTAG 50		/* maximum tag length */
#define LITSTKLEN 20		/* length of literal stack */
#define MAXCLIENTLIT 10000	/* maximum non-APPEND client literal size
				 * must be smaller than 4294967295
				 */
#define MAXAPPENDTXT 0x40000000	/* maximum APPEND literal size
				 * must be smaller than 4294967295
				 */
#define CMDLEN 65536		/* size of command buffer */


/* Server states */

typedef enum {
  LOGIN = 0,
  SELECT,
  OPEN,
  LOGOUT
} IMAPSTATE;

/* Body text fetching */

typedef struct text_args {
  char *section;		/* body section */
  STRINGLIST *lines;		/* header lines */
  unsigned long first;		/* first octet to fetch */
  unsigned long last;		/* number of octets to fetch */
  long flags;			/* fetch flags */
  long binary;			/* binary flags */
} TEXTARGS;

#define FTB_BINARY 0x1		/* fetch as binary */
#define FTB_SIZE 0x2		/* fetch size only */


/* Append data */

typedef struct append_data {
  unsigned char *arg;		/* append argument pointer */
  char *flags;			/* message flags */
  char *date;			/* message date */
  char *msg;			/* message text */
  STRING *message;		/* message stringstruct */
} APPENDDATA;


/* Message pointer */

typedef struct msg_data {
  MAILSTREAM *stream;		/* stream */
  unsigned long msgno;		/* message number */
  char *flags;			/* current flags */
  char *date;			/* current date */
  STRING *message;		/* stringstruct of message */
} MSGDATA;

/* Function prototypes */

int main (int argc,char *argv[]);
void ping_mailbox (unsigned long uid);
time_t palert (char *file,time_t oldtime);
void msg_string_init (STRING *s,void *data,unsigned long size);
char msg_string_next (STRING *s);
void msg_string_setpos (STRING *s,unsigned long i);
void new_flags (MAILSTREAM *stream);
void settimeout (unsigned int i);
void clkint (void);
void dieint (void);
void kodint (void);
void hupint (void);
void trmint (void);
void staint (void);
char *sout (char *s,char *t);
char *nout (char *s,unsigned long n,unsigned long base);
void slurp (char *s,int n,unsigned long timeout);
void inliteral (char *s,unsigned long n);
unsigned char *flush (void);
void ioerror (FILE *f,char *reason);
unsigned char *parse_astring (unsigned char **arg,unsigned long *i,
			      unsigned char *del);
unsigned char *parse_tag (unsigned char *cmd,unsigned char **ret);
unsigned char *snarf (unsigned char **arg);
unsigned char *snarf_base64 (unsigned char **arg);
unsigned char *snarf_list (unsigned char **arg);
STRINGLIST *parse_stringlist (unsigned char **s,int *list);
unsigned long uidmax (MAILSTREAM *stream);
long parse_criteria (SEARCHPGM *pgm,unsigned char **arg,unsigned long maxmsg,
		     unsigned long maxuid,unsigned long depth);
long parse_criterion (SEARCHPGM *pgm,unsigned char **arg,unsigned long msgmsg,
		      unsigned long maxuid,unsigned long depth);
long crit_date (unsigned short *date,unsigned char **arg);
long crit_date_work (unsigned short *date,unsigned char **arg);
long crit_set (SEARCHSET **set,unsigned char **arg,unsigned long maxima);
long crit_number (unsigned long *number,unsigned char **arg);
long crit_string (STRINGLIST **string,unsigned char **arg);

void fetch (char *t,unsigned long uid);
typedef void (*fetchfn_t) (unsigned long i,void *args);
void fetch_work (char *t,unsigned long uid,fetchfn_t f[],void *fa[]);
void fetch_bodystructure (unsigned long i,void *args);
void fetch_body (unsigned long i,void *args);
void fetch_body_part_mime (unsigned long i,void *args);
void fetch_body_part_contents (unsigned long i,void *args);
void fetch_body_part_binary (unsigned long i,void *args);
void fetch_body_part_header (unsigned long i,void *args);
void fetch_body_part_text (unsigned long i,void *args);
void remember (unsigned long uid,char *id,SIZEDTEXT *st);
void fetch_envelope (unsigned long i,void *args);
void fetch_encoding (unsigned long i,void *args);
void changed_flags (unsigned long i,int f);
void fetch_flags (unsigned long i,void *args);
void put_flag (int *c,char *s);
void fetch_internaldate (unsigned long i,void *args);
void fetch_uid (unsigned long i,void *args);
void fetch_rfc822 (unsigned long i,void *args);
void fetch_rfc822_header (unsigned long i,void *args);
void fetch_rfc822_size (unsigned long i,void *args);
void fetch_rfc822_text (unsigned long i,void *args);
void penv (ENVELOPE *env);
void pbodystructure (BODY *body);
void pbody (BODY *body);
void pparam (PARAMETER *param);
void paddr (ADDRESS *a);
void pset (SEARCHSET **set);
void pnum (unsigned long i);
void pstring (char *s);
void pnstring (char *s);
void pastring (char *s);
void psizedquoted (SIZEDTEXT *s);
void psizedliteral (SIZEDTEXT *s,STRING *st);
void psizedstring (SIZEDTEXT *s,STRING *st);
void psizedastring (SIZEDTEXT *s);
void pastringlist (STRINGLIST *s);
void pnstringorlist (STRINGLIST *s);
void pbodypartstring (unsigned long msgno,char *id,SIZEDTEXT *st,STRING *bs,
		      TEXTARGS *ta);
void ptext (SIZEDTEXT *s,STRING *st);
void pthread (THREADNODE *thr);
void pcapability (long flag);
long nameok (char *ref,char *name);
char *bboardname (char *cmd,char *name);
long isnewsproxy (char *name);
long newsproxypattern (char *ref,char *pat,char *pattern,long flag);
char *imap_responder (void *challenge,unsigned long clen,unsigned long *rlen);
long proxycopy (MAILSTREAM *stream,char *sequence,char *mailbox,long options);
long proxy_append (MAILSTREAM *stream,void *data,char **flags,char **date,
		   STRING **message);
long append_msg (MAILSTREAM *stream,void *data,char **flags,char **date,
		 STRING **message);
void copyuid (MAILSTREAM *stream,char *mailbox,unsigned long uidvalidity,
	      SEARCHSET *sourceset,SEARCHSET *destset);
void appenduid (char *mailbox,unsigned long uidvalidity,SEARCHSET *set);
char *referral (MAILSTREAM *stream,char *url,long code);
void mm_list_work (char *what,int delimiter,char *name,long attributes);
char *lasterror (void);

/* Global storage */

char *version = "417";		/* edit number of this server */
char *logout = "Logout";	/* syslogreason for logout */
char *goodbye = NIL;		/* bye reason */
time_t alerttime = 0;		/* time of last alert */
time_t sysalerttime = 0;	/* time of last system alert */
time_t useralerttime = 0;	/* time of last user alert */
time_t lastcheck = 0;		/* time of last checkpoint */
time_t shutdowntime = 0;	/* time of last shutdown */
int blackberry = 0;		/* 1 if BlackBerry, -1 if not, 0 if unknown */
int nlibcm = MAXNLIBADCOMMAND;	/* limit number of bad commands */
IMAPSTATE state = LOGIN;	/* server state */
int cancelled = NIL;		/* authenticate cancelled */
int trycreate = 0;		/* saw a trycreate */
int finding = NIL;		/* doing old FIND command */
int anonymous = 0;		/* non-zero if anonymous */
int critical = NIL;		/* non-zero if in critical code */
int quell_events = NIL;		/* non-zero if in FETCH response */
int existsquelled = NIL;	/* non-zero if an EXISTS was quelled */
int proxylist = NIL;		/* doing a proxy LIST */
MAILSTREAM *stream = NIL;	/* mailbox stream */
DRIVER *curdriver = NIL;	/* note current driver */
MAILSTREAM *tstream = NIL;	/* temporary mailbox stream */
unsigned int nflags = 0;	/* current number of keywords */
unsigned long nmsgs =0xffffffff;/* last reported # of messages and recent */
unsigned long recent = 0xffffffff;
char *nntpproxy = NIL;		/* NNTP proxy name */
unsigned char *user = NIL;	/* user name */
unsigned char *pass = NIL;	/* password */
unsigned char *initial = NIL;	/* initial response */
unsigned char cmdbuf[CMDLEN];	/* command buffer */
char *status = "starting up";	/* server status */
char *tag;			/* tag portion of command */
unsigned char *cmd;		/* command portion of command */
unsigned char *arg;		/* pointer to current argument of command */
char *lstwrn = NIL;		/* last warning message from c-client */
char *lsterr = NIL;		/* last error message from c-client */
char *lstref = NIL;		/* last referral from c-client */
char *response = NIL;		/* command response */
char *sstate = NIL;		/* strtok state */
struct {
  unsigned long size;		/* size of current LITERAL+ */
  unsigned int ok : 1;		/* LITERAL+ in effect */
} litplus;
int litsp = 0;			/* literal stack pointer */
char *litstk[LITSTKLEN];	/* stack to hold literals */
unsigned long uidvalidity = 0;	/* last reported UID validity */
unsigned long lastuid = 0;	/* last fetched uid */
char *lastid = NIL;		/* last fetched body id for this message */
char *lastsel = NIL;		/* last selected mailbox name */
SIZEDTEXT lastst = {NIL,0};	/* last sizedtext */
unsigned long cauidvalidity = 0;/* UIDVALIDITY for COPYUID/APPENDUID */
SEARCHSET *csset = NIL;		/* COPYUID source set */
SEARCHSET *caset = NIL;		/* COPYUID/APPENDUID destination set */
jmp_buf jmpenv;			/* stack context for setjmp */


/* Response texts which appear in multiple places */

char *win = "%.80s OK ";
char *rowin = "%.80s OK [READ-ONLY] %.80s completed\015\012";
char *rwwin = "%.80s OK [READ-WRITE] %.80s completed\015\012";
char *lose = "%.80s NO ";
char *logwin = "%.80s OK [";
char *losetry = "%.80s NO [TRYCREATE] %.80s failed: %.800s\015\012";
char *loseunknowncte = "%.80s NO [UNKNOWN-CTE] %.80s failed: %.800s\015\012";
char *badcmd = "%.80s BAD Command unrecognized: %.80s\015\012";
char *badcml = "%.80s BAD Command unrecognized\015\012";
char *misarg = "%.80s BAD Missing or invalid argument to %.80s\015\012";
char *badarg = "%.80s BAD Argument given to %.80s when none expected\015\012";
char *badseq = "%.80s BAD Bogus sequence in %.80s: %.80s\015\012";
char *badatt = "%.80s BAD Bogus attribute list in %.80s\015\012";
char *badbin = "%.80s BAD Syntax error in binary specifier\015\012";

/* Message string driver for message stringstructs */

STRINGDRIVER msg_string = {
  msg_string_init,		/* initialize string structure */
  msg_string_next,		/* get next byte in string structure */
  msg_string_setpos		/* set position in string structure */
};

/* Main program */

int main (int argc,char *argv[])
{
  unsigned long i,uid;
  long f;
  unsigned char *s,*t,*u,*v,tmp[MAILTMPLEN];
  struct stat sbuf;
  logouthook_t lgoh;
  int ret = 0;
  time_t autologouttime = 0;
  char *pgmname;
				/* if case we get borked immediately */
  if (setjmp (jmpenv)) _exit (1);
  pgmname = (argc && argv[0]) ?
    (((s = strrchr (argv[0],'/')) || (s = strrchr (argv[0],'\\'))) ?
     (char *) s+1 : argv[0]) : "imapd";
				/* set service name before linkage */
  mail_parameters (NIL,SET_SERVICENAME,(void *) "imap");
#include "linkage.c"
  rfc822_date (tmp);		/* get date/time at startup */
				/* initialize server */
  server_init (pgmname,"imap","imaps",clkint,kodint,hupint,trmint,staint);
				/* forbid automatic untagged expunge */
  mail_parameters (NIL,SET_EXPUNGEATPING,NIL);
				/* arm proxy copy callback */
  mail_parameters (NIL,SET_MAILPROXYCOPY,(void *) proxycopy);
				/* arm referral callback */
  mail_parameters (NIL,SET_IMAPREFERRAL,(void *) referral);
				/* arm COPYUID callback */
  mail_parameters (NIL,SET_COPYUID,(void *) copyuid);
				/* arm APPENDUID callback */
  mail_parameters (NIL,SET_APPENDUID,(void *) appenduid);

  if (stat (SHUTDOWNFILE,&sbuf)) {
    char proxy[MAILTMPLEN];
    FILE *nntp = fopen (NNTPFILE,"r");
    if (nntp) {			/* desire NNTP proxy? */
      if (fgets (proxy,MAILTMPLEN,nntp)) {
				/* remove newline and set NNTP proxy */
	if ((s = strchr (proxy,'\n')) != NULL) *s = '\0';
	nntpproxy = cpystr (proxy);
				/* disable the news driver */
	mail_parameters (NIL,DISABLE_DRIVER,"news");
      }
      fclose (nntp);		/* done reading proxy name */
    }
    s = myusername_full (&i);	/* get user name and flags */
    switch (i) {
    case MU_NOTLOGGEDIN:
      PSOUT ("* OK [");		/* not logged in, ordinary startup */
      pcapability (-1);
      break;
    case MU_ANONYMOUS:
      anonymous = T;		/* anonymous user, fall into default */
      s = "ANONYMOUS";
    case MU_LOGGEDIN:
      PSOUT ("* PREAUTH [");	/* already logged in, pre-authorized */
      pcapability (1);
      user = cpystr (s);	/* copy user name */
      pass = cpystr ("*");	/* set fake password */
      state = SELECT;		/* enter select state */
      break;
    default:
      fatal ("Unknown state from myusername_full()");
    }
    PSOUT ("] ");
    if (user) {			/* preauthenticated as someone? */
      PSOUT ("Pre-authenticated user ");
      PSOUT (user);
      PBOUT (' ');
    }
  }
  else {			/* login disabled */
    PSOUT ("* BYE Service not available ");
    state = LOGOUT;
  }
  PSOUT (tcp_serverhost ());
  PSOUT (" Panda IMAP ");
  PSOUT (CCLIENTVERSION);
  PBOUT ('.');
  PSOUT (version);
  PSOUT (" at ");
  PSOUT (tmp);
  CRLF;
  PFLUSH ();			/* dump output buffer */
  switch (state) {		/* do this after the banner */
  case LOGIN:
    autologouttime = time (0) + LOGINTIMEOUT;
    break;
  case SELECT:
    syslog (LOG_INFO,"Preauthenticated user=%.80s host=%.80s",
	    user,tcp_clienthost ());
    break;
  }

  if (setjmp (jmpenv)) {	/* die if a signal handler say so */
				/* in case we get borked now */
    if (setjmp (jmpenv)) _exit (1);
				/* need to close stream gracefully? */
    if (stream && !stream->lock && (stream->dtb->flags & DR_XPOINT))
      stream = mail_close (stream);
    ret = 1;			/* set exit status */
  }
  else while (state != LOGOUT) {/* command processing loop */
    slurp (cmdbuf,CMDLEN,TIMEOUT);
				/* no more last error or literal */
    if (lstwrn) fs_give ((void **) &lstwrn);
    if (lsterr) fs_give ((void **) &lsterr);
    if (lstref) fs_give ((void **) &lstref);
    while (litsp) fs_give ((void **) &litstk[--litsp]);
				/* find end of line */
    if ((t = strchr (cmdbuf,'\012')) != NULL) {
				/* tie off command termination */
      if ((t > cmdbuf) && (t[-1] == '\015')) --t;
      *t = '\0';		/* tie off LF or CRLF */
    }
    if (!t) {			/* probably line too long if not terminated */
      if ((t = strchr (cmdbuf,' ')) != NULL) {
	if ((t - cmdbuf) > MAXTAG) t = NIL;
	else *t = '\0';
      }
      flush ();			/* flush excess, set response */
      if (state == LOGIN) { 	/* error if NLI */
	syslog (LOG_INFO,"Line too long before authentication host=%.80s",
		tcp_clienthost ());
	state = LOGOUT;
      }
      sprintf (tmp,response,t ? (char *) cmdbuf : "*");
      PSOUT (tmp);
    }
    else if (!(tag = parse_tag (cmdbuf,&s))) {
      if (state == LOGIN) {	/* error if NLI */
	syslog (LOG_INFO,"Null command before authentication host=%.80s",
		tcp_clienthost ());
	state = LOGOUT;
      }
      PSOUT ("* BAD Missing command tag\015\012");
    }
    else if (strlen (tag) > MAXTAG)
      PSOUT ("* BAD Excessively long tag\015\012");
    else if (!*s) {		/* make sure have command */
      if (state == LOGIN) {	/* error if NLI */
	syslog (LOG_INFO,"Missing command before authentication host=%.80s",
		tcp_clienthost ());
	state = LOGOUT;
      }
      PSOUT (tag);
      PSOUT (" BAD Missing command\015\012");
    }
    else {			/* parse command */
      response = win;		/* set default response */
      finding = NIL;		/* no longer FINDing */
				/* UID command? */
      if (((s[0] == 'U') || (s[0] == 'u')) &&
	  ((s[1] == 'I') || (s[1] == 'i')) &&
	  ((s[2] == 'D') || (s[2] == 'd')) && (s[3] == ' ')) {
	uid = T;		/* a UID command */
	arg = strchr (s+4,' ');	/* find argument */
      }
      else {
	uid = NIL;		/* not a UID command */
	arg = strchr (s,' ');	/* find argument */
      }
      if (arg) *arg++ = '\0';	/* tie off command argument */
      ucase (s);		/* canonicalize command case */
				/* flush previous saved command */
      if (cmd) fs_give ((void **) &cmd);
      cmd = cpystr (s);		/* save current command */
				/* snarf argument, see if possible litplus */
      if (arg && ((i = strlen (arg)) > 3) &&
	  (arg[i - 1] == '}') && (arg[i - 2] == '+') && isdigit (arg[i - 3])) {
				/* back over possible count */
	for (i -= 4; i && isdigit (arg[i]); i--);
	if (arg[i] == '{') {	/* found a literal? */
	  litplus.ok = T;	/* yes, note LITERAL+ in effect, set size */
	  litplus.size = strtoul (arg + i + 1,NIL,10);
	}
      }

      if (!blackberry) {	/* do we know if it's a BlackBerry yet? */
	char *bb[] = {".blackberry.com", ".blackberry.net", NIL};
	size_t bbs;
	unsigned char *cl = cpystr (tcp_clienthost ());
	size_t cls;
				/* get just host name, calculate length */
	if ((t = strchr (cl,' ')) != NULL) {
	  *t = '\0';
	  cls = t - cl;
	}
	else cls = strlen (cl);
	for (i = 0; bb[i]; ++i) {
	  if (((bbs = strlen (bb[i])) < cls) &&
	      !compare_cstring(bb[i], cl + cls - bbs))
	    blackberry = 1;
	}
	fs_give ((void **) & cl);
				/* not a blackberry if no match on list */
	if(!blackberry) blackberry = -1;
      }
				/* these commands always valid */
      if (!strcmp (cmd,"NOOP")) {
	if (arg) response = badarg;
	else if (stream)	/* allow untagged EXPUNGE */
	  mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
      }
      else if (!strcmp (cmd,"LOGOUT")) {
	if (arg) response = badarg;
	else {			/* time to say farewell */
	  server_init (NIL,NIL,NIL,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN);
	  if (lastsel) fs_give ((void **) &lastsel);
	  if (state == OPEN) stream = mail_close (stream);
	  state = LOGOUT;
	  PSOUT ("* BYE ");
	  PSOUT (mylocalhost ());
	  PSOUT (" IMAP4rev1 server terminating connection\015\012");
	}
      }
      else if (!strcmp (cmd,"CAPABILITY")) {
	if (arg) response = badarg;
	else {
	  PSOUT ("* ");
	  pcapability (0);	/* print capabilities */
	  CRLF;
	}
	if (stream)		/* allow untagged EXPUNGE */
	  mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
      }
#ifdef NETSCAPE_BRAIN_DAMAGE
      else if (!strcmp (cmd,"NETSCAPE")) {
	PSOUT ("* OK [NETSCAPE]\015\012* VERSION 1.0 UNIX\015\012* ACCOUNT-URL \"");
	PSOUT (NETSCAPE_BRAIN_DAMAGE);
	PBOUT ('"');
	CRLF;
      }
#endif

      else switch (state) {	/* dispatch depending upon state */
      case LOGIN:		/* waiting to get logged in */
				/* new style authentication */
	if (!strcmp (cmd,"AUTHENTICATE")) {
	  if (user) fs_give ((void **) &user);
	  if (pass) fs_give ((void **) &pass);
	  initial = NIL;	/* no initial argument */
	  cancelled = NIL;	/* not cancelled */
				/* mandatory first argument */
	  if (!(s = snarf (&arg))) response = misarg;
	  else if (arg && !(initial = snarf_base64 (&arg)))
	    response = misarg;	/* optional second argument */
	  else if (arg) response = badarg;
	  else if (!strcmp (ucase (s),"ANONYMOUS") && !stat (ANOFILE,&sbuf)) {
	    if (!(s = imap_responder ("",0,NIL)))
	      response ="%.80s BAD AUTHENTICATE ANONYMOUS cancelled\015\012";
	    else if (anonymous_login (argc,argv)) {
	      anonymous = T;	/* note we are anonymous */
	      user = cpystr ("ANONYMOUS");
	      pass = cpystr ("*");
	      state = SELECT;	/* make select */
	      alerttime = 0;	/* force alert */
	      response = logwin;/* return logged-in capabilities */
	      syslog (LOG_INFO,"Authenticated anonymous=%.80s host=%.80s",s,
		      tcp_clienthost ());
	      fs_give ((void **) &s);
	    }
	    else response ="%.80s NO AUTHENTICATE ANONYMOUS failed\015\012";
	  }
	  else if ((user = cpystr (mail_auth (s,imap_responder,argc,argv))) != NULL) {
	    pass = cpystr ("*");
	    state = SELECT;	/* make select */
	    alerttime = 0;	/* force alert */
	    response = logwin;	/* return logged-in capabilities */
	    syslog (LOG_INFO,"Authenticated user=%.80s host=%.80s mech=%.80s",
		    user,tcp_clienthost (),s);
	  }

	  else {
	    AUTHENTICATOR *auth = mail_lookup_auth (1);
	    char *msg = (char *) fs_get (strlen (cmd) + strlen (s) + 2);
	    sprintf (msg,"%s %s",cmd,s);
	    fs_give ((void **) &cmd);
	    cmd = msg;
	    for (i = !mail_parameters (NIL,GET_DISABLEPLAINTEXT,NIL);
		 auth && compare_cstring (s,auth->name); auth = auth->next);
	    /* Failed authentication when hidden looks like invalid command.
	     * This is intentional but confused me when I was debugging.
	     */
	    if (auth && auth->server && !(auth->flags & AU_DISABLE) &&
		!(auth->flags & AU_HIDE) && (i || (auth->flags & AU_SECURE))) {
	      response = lose;
	      if (cancelled) {
		if (lsterr) fs_give ((void **) &lsterr);
		lsterr = cpystr ("cancelled by user");
	      }
	      if (!lsterr)	/* catch-all */
		lsterr = cpystr ("Invalid authentication credentials");
	      syslog (LOG_INFO,"AUTHENTICATE %.80s failure host=%.80s",s,
		      tcp_clienthost ());
	    }
	    else {
	      response = badcml;
	      syslog (LOG_INFO,"AUTHENTICATE %.80s invalid host=%.80s",s,
		      tcp_clienthost ());
	    }
	  }
	}

				/* plaintext login with password */
	else if (!strcmp (cmd,"LOGIN")) {
	  if (user) fs_give ((void **) &user);
	  if (pass) fs_give ((void **) &pass);
				/* two arguments */
	  if (!((user = cpystr (snarf (&arg))) &&
		(pass = cpystr (snarf (&arg))))) response = misarg;
	  else if (arg) response = badarg;
				/* see if we allow anonymous */
	  else if (!compare_cstring (user,"ANONYMOUS") &&
		   !stat (ANOFILE,&sbuf) && anonymous_login (argc,argv)) {
	    anonymous = T;	/* note we are anonymous */
	    ucase (user);	/* make all uppercase for consistency */
	    state = SELECT;	/* make select */
	    alerttime = 0;	/* force alert */
	    response = logwin;	/* return logged-in capabilities */
	    syslog (LOG_INFO,"Login anonymous=%.80s host=%.80s",pass,
		    tcp_clienthost ());
	  }
	  else {		/* delimit user from possible admin */
	    if ((s = strchr (user,'*')) != NULL) *s++ ='\0';
				/* see if username and password are OK */
	    if (server_login (user,pass,s,argc,argv)) {
	      state = SELECT;	/* make select */
	      alerttime = 0;	/* force alert */
	      response = logwin;/* return logged-in capabilities */
	      syslog (LOG_INFO,"Login user=%.80s host=%.80s",user,
		      tcp_clienthost ());
	    }
	    else {
	      response = lose;
	      if (!lsterr) lsterr = cpystr ("Invalid login credentials");
	    }
	  }
	}
				/* start TLS security */
	else if (!strcmp (cmd,"STARTTLS")) {
	  if (arg) response = badarg;
	  else if ((lsterr = ssl_start_tls (pgmname)) != NULL) response = lose;
	}
	else {
	  response = badcml;
				/* limit the number of bad commands */
	  if (--nlibcm <= 0) state = LOGOUT;
	}
	break;

      case OPEN:		/* valid only when mailbox open */
				/* fetch mailbox attributes */
	if (!strcmp (cmd,"FETCH") || !strcmp (cmd,"UID FETCH")) {
	  if (!(arg && (s = strtok_r (arg," ",&sstate)) &&
		(t = strtok_r (NIL,"\015\012",&sstate))))
	    response = misarg;
	  else if (uid ? mail_uid_sequence (stream,s) :
		   mail_sequence (stream,s)) fetch (t,uid);
	  else response = badseq;
	}
				/* store mailbox attributes */
	else if (!strcmp (cmd,"STORE") || !strcmp (cmd,"UID STORE")) {
				/* must have three arguments */
	  if (!(arg && (s = strtok_r (arg," ",&sstate)) &&
		(v = strtok_r (NIL," ",&sstate)) &&
		(t = strtok_r (NIL,"\015\012",&sstate)))) response = misarg;
	  else if (!(uid ? mail_uid_sequence (stream,s) :
		     mail_sequence (stream,s))) response = badseq;
	  else {
	    f = ST_SET | (uid ? ST_UID : NIL)|((v[5]&&v[6]) ? ST_SILENT : NIL);
	    if (!strcmp (ucase (v),"FLAGS") || !strcmp (v,"FLAGS.SILENT")) {
	      strcpy (tmp,"\\Answered \\Flagged \\Deleted \\Draft \\Seen");
	      for (i = 0, u = tmp;
		   (i < NUSERFLAGS) && (v = stream->user_flags[i]); i++)
	        if (strlen (v) <
		    ((size_t) (MAILTMPLEN - ((u += strlen (u)) + 2 - tmp)))) {
		  *u++ = ' ';	/* write next flag */
		  strcpy (u,v);
		}
	      mail_flag (stream,s,tmp,f & ~ST_SET);
	    }
	    else if (!strcmp (v,"-FLAGS") || !strcmp (v,"-FLAGS.SILENT"))
	      f &= ~ST_SET;	/* clear flags */
	    else if (strcmp (v,"+FLAGS") && strcmp (v,"+FLAGS.SILENT")) {
	      response = badatt;
	      break;
	    }
				/* find last keyword */
	    for (i = 0; (i < NUSERFLAGS) && stream->user_flags[i]; i++);
	    mail_flag (stream,s,t,f);
				/* any new keywords appeared? */
	    if (i < NUSERFLAGS && stream->user_flags[i]) new_flags (stream);
				/* return flags if silence not wanted */
	    if (uid ? mail_uid_sequence (stream,s) : mail_sequence (stream,s))
	      for (i = 1; i <= nmsgs; i++) if (mail_elt(stream,i)->sequence)
		mail_elt (stream,i)->spare2 = (f & ST_SILENT) ? NIL : T;
	  }
	}

				/* check for new mail */
	else if (!strcmp (cmd,"CHECK")) {
				/* no arguments */
	  if (arg) response = badarg;
	  else if (!anonymous) {
	    mail_check (stream);
				/* remember last check time */
	    lastcheck = time (0);
	  }
	}
				/* expunge deleted messages */
	else if (!(anonymous || (strcmp (cmd,"EXPUNGE") &&
				 strcmp (cmd,"UID EXPUNGE")))) {
	  if (uid && !arg) response = misarg;
	  else if (!uid && arg) response = badarg;
	  else {		/* expunge deleted or specified UIDs */
	    mail_expunge_full (stream,arg,arg ? EX_UID : NIL);
				/* remember last checkpoint */
	    lastcheck = time (0);
	  }
	}
				/* close mailbox */
	else if (!strcmp (cmd,"CLOSE") || !strcmp (cmd,"UNSELECT")) {
				/* no arguments */
	  if (arg) response = badarg;
	  else {
				/* no last uid */
	    uidvalidity = lastuid = 0;
	    if (lastsel) fs_give ((void **) &lastsel);
	    if (lastid) fs_give ((void **) &lastid);
	    if (lastst.data) fs_give ((void **) &lastst.data);
	    stream = mail_close_full (stream,((*cmd == 'C') && !anonymous) ?
				      CL_EXPUNGE : NIL);
	    state = SELECT;	/* no longer opened */
	    lastcheck = 0;	/* no last checkpoint */
	  }
	}
	else if (!anonymous &&	/* copy message(s) */
		 (!strcmp (cmd,"COPY") || !strcmp (cmd,"UID COPY"))) {
	  trycreate = NIL;	/* no trycreate status */
	  if (!(arg && (s = strtok_r (arg," ",&sstate)) &&
		(arg = strtok_r (NIL,"\015\012",&sstate))
		&& (t = snarf (&arg)))) response = misarg;
	  else if (arg) response = badarg;
	  else if (!nmsgs) {
	    response = lose;
	    if (!lsterr) lsterr = cpystr ("Mailbox is empty");
	  }
	  else if (!(uid ? mail_uid_sequence (stream,s) :
		     mail_sequence (stream,s))) response = badseq;
				/* try copy */
	  else if (!mail_copy_full (stream,s,t,uid ? CP_UID : NIL)) {
	    response = trycreate ? losetry : lose;
	    if (!lsterr) lsterr = cpystr ("No such destination mailbox");
	  }
	}

				/* sort mailbox */
	else if (!strcmp (cmd,"SORT") || !strcmp (cmd,"UID SORT")) {
				/* must have four arguments */
	  if (!(arg && (*arg == '(') && (t = strchr (s = arg + 1,')')) &&
		(t[1] == ' ') && (*(arg = t + 2)))) response = misarg;
	  else {		/* read criteria */
	    SEARCHPGM *spg = NIL;
	    char *cs = NIL;
	    SORTPGM *pgm = NIL,*pg = NIL;
	    unsigned long *slst,*sl;
	    *t = NIL;		/* tie off criteria list */
	    if (!(s = strtok_r (ucase (s)," ",&sstate))) response = badatt;
	    else {
	      do {		/* parse sort attributes */
		if (pg) pg = pg->next = mail_newsortpgm ();
		else pgm = pg = mail_newsortpgm ();
		if (!strcmp (s,"REVERSE")) {
		  pg->reverse = T;
		  if (!(s = strtok_r (NIL," ",&sstate))) {
		    s = "";	/* end of attributes */
		    break;
		  }
		}
		if (!strcmp (s,"DATE")) pg->function = SORTDATE;
		else if (!strcmp (s,"ARRIVAL")) pg->function = SORTARRIVAL;
		else if (!strcmp (s,"FROM")) pg->function = SORTFROM;
		else if (!strcmp (s,"SUBJECT")) pg->function = SORTSUBJECT;
		else if (!strcmp (s,"TO")) pg->function = SORTTO;
		else if (!strcmp (s,"CC")) pg->function = SORTCC;
		else if (!strcmp (s,"SIZE")) pg->function = SORTSIZE;
		else break;
	      } while ((s = strtok_r (NIL," ",&sstate)) != NULL);
				/* bad SORT attribute */
	      if (s) response = badatt;
				/* get charset and search criteria */
	      else if (!((t = snarf (&arg)) && (cs = cpystr (t)) && arg &&
			 *arg)) response = misarg;
				/* parse search criteria  */
	      else if (!parse_criteria (spg = mail_newsearchpgm (),&arg,nmsgs,
					uidmax (stream),0)) response = badatt;
	      else if (arg && *arg) response = badarg;
	      else if ((slst = mail_sort (stream,cs,spg,pgm,uid ? SE_UID:NIL)) != NULL) {
		PSOUT ("* SORT");
		for (sl = slst; *sl; sl++) {
		  PBOUT (' ');
		  pnum (*sl);
		}
		CRLF;
		fs_give ((void **) &slst);
	      }
	    }
	    if (pgm) mail_free_sortpgm (&pgm);
	    if (spg) mail_free_searchpgm (&spg);
	    if (cs) fs_give ((void **) &cs);
	  }
	}

				/* thread mailbox */
	else if (!strcmp (cmd,"THREAD") || !strcmp (cmd,"UID THREAD")) {
	  THREADNODE *thr;
	  SEARCHPGM *spg = NIL;
	  char *cs = NIL;
				/* must have four arguments */
	  if (!(arg && (s = strtok_r (arg," ",&sstate)) &&
		(cs = strtok_r (NIL," ",&sstate)) && (cs = cpystr (cs)) &&
		(arg = strtok_r (NIL,"\015\012",&sstate))))
	    response = misarg;
	  else if (!parse_criteria (spg = mail_newsearchpgm (),&arg,nmsgs,
				    uidmax (stream),0)) response = badatt;
	  else if (arg && *arg) response = badarg;
	  else {
	    if ((thr = mail_thread (stream,s,cs,spg,uid ? SE_UID : NIL)) != NULL) {
	      PSOUT ("* THREAD ");
	      pthread (thr);
	      mail_free_threadnode (&thr);
	    }
	    else PSOUT ("* THREAD");
	    CRLF;
	  }
	  if (spg) mail_free_searchpgm (&spg);
	  if (cs) fs_give ((void **) &cs);
	}

				/* search mailbox */
        else if (!strcmp (cmd,"SEARCH") || !strcmp (cmd,"UID SEARCH")) {
	  int retval = NIL;
	  char *charset = NIL;
	  SEARCHPGM *pgm;
	  response = misarg;	/* assume failure */
	  if (!arg) break;	/* one or more arguments required */
	  if (((arg[0] == 'R') || (arg[0] == 'r')) &&
	      ((arg[1] == 'E') || (arg[1] == 'e')) &&
	      ((arg[2] == 'T') || (arg[2] == 't')) &&
	      ((arg[3] == 'U') || (arg[3] == 'u')) &&
	      ((arg[4] == 'R') || (arg[4] == 'r')) &&
	      ((arg[5] == 'N') || (arg[5] == 'n')) &&
	      (arg[6] == ' ') && (arg[7] == '(')) {
	    retval = 0x4000;	/* return is specified */
	    for (arg += 8; *arg && (*arg != ')'); ) {
	      if (((arg[0] == 'M') || (arg[0] == 'm')) &&
		  ((arg[1] == 'I') || (arg[1] == 'i')) &&
		  ((arg[2] == 'N') || (arg[2] == 'n')) &&
		  ((arg[3] == ' ') || (arg[3] == ')'))) {
		retval |= 0x1;
		arg += 3;
	      }
	      else if (((arg[0] == 'M') || (arg[0] == 'm')) &&
		       ((arg[1] == 'A') || (arg[1] == 'a')) &&
		       ((arg[2] == 'X') || (arg[2] == 'x')) &&
		       ((arg[3] == ' ') || (arg[3] == ')'))) {
		retval |= 0x2;
		arg += 3;
	      }
	      else if (((arg[0] == 'A') || (arg[0] == 'a')) &&
		       ((arg[1] == 'L') || (arg[1] == 'l')) &&
		       ((arg[2] == 'L') || (arg[2] == 'l')) &&
		       ((arg[3] == ' ') || (arg[3] == ')'))) {
		retval |= 0x4;
		arg += 3;
	      }
	      else if (((arg[0] == 'C') || (arg[0] == 'c')) &&
		       ((arg[1] == 'O') || (arg[1] == 'o')) &&
		       ((arg[2] == 'U') || (arg[2] == 'u')) &&
		       ((arg[3] == 'N') || (arg[3] == 'n')) &&
		       ((arg[4] == 'T') || (arg[4] == 't')) &&
		       ((arg[5] == ' ') || (arg[5] == ')'))) {
		retval |= 0x10;
		arg += 5;
	      }
	      else break;	/* unknown return value */
				/* more return values to come */
	      if ((*arg == ' ') && (arg[1] != ')')) ++arg;
	    }
				/* RETURN list must be properly terminated */
	    if ((*arg++ != ')') || (*arg++ != ' ')) break;
				/* default return value is ALL */
	    if (!(retval &= 0x3fff)) retval = 0x4;
	  }

				/* character set specified? */
	  if (((arg[0] == 'C') || (arg[0] == 'c')) &&
	      ((arg[1] == 'H') || (arg[1] == 'h')) &&
	      ((arg[2] == 'A') || (arg[2] == 'a')) &&
	      ((arg[3] == 'R') || (arg[3] == 'r')) &&
	      ((arg[4] == 'S') || (arg[4] == 's')) &&
	      ((arg[5] == 'E') || (arg[5] == 'e')) &&
	      ((arg[6] == 'T') || (arg[6] == 't')) &&
	      (arg[7] == ' ')) {
	    arg += 8;		/* yes, skip over CHARSET token */
	    if ((s = snarf (&arg)) != NULL) charset = cpystr (s);
	    else break;		/* missing character set */
	  }
				/* must have arguments here */
	  if (!(arg && *arg)) break;
	  if (parse_criteria (pgm = mail_newsearchpgm (),&arg,nmsgs,
			      uidmax (stream),0) && !*arg) {
	    response = win;	/* looks good, try the search */
	    mail_search_full (stream,charset,pgm,SE_FREE);
				/* output search results if success */
	    if (response == win) {
	      if (retval) {	/* ESEARCH desired */
		PSOUT ("* ESEARCH (TAG ");
		pstring (tag);
		PBOUT (')');
		if (uid) PSOUT (" UID");
				/* wants MIN */
		if (retval & 0x1) {
		  for (i = 1; (i <= nmsgs) && !mail_elt (stream,i)->searched;
		       ++i);
		  if (i <= nmsgs) {
		    PSOUT (" MIN ");
		    pnum (uid ? mail_uid (stream,i) : i);
		  }
		}
				/* wants MAX */
		if (retval & 0x2) {
		  for (i = nmsgs; i && !mail_elt (stream,i)->searched; --i);
		  if (i) {
		    PSOUT (" MAX ");
		    pnum (uid ? mail_uid (stream,i) : i);
		  }
		}

				/* wants ALL */
		if (retval & 0x4) {
		  unsigned long j,juid,iuid;
				/* find first match */
		  for (i = 1; (i <= nmsgs) && !mail_elt (stream,i)->searched;
		       ++i);
		  if (i <= nmsgs) {
		    juid= (uid ? mail_uid (stream,i) : i);
		    PSOUT (" ALL ");
		    pnum (juid);
		    j = i;	/* last message index processed */
		  }
		  if (uid) {	/* doing UIDs, no MRC optimization */
		    while (++i <= nmsgs) {
		      if (mail_elt (stream,i)->searched) {	/* this message matches */
			iuid= mail_uid (stream,i);
			if (juid == (iuid - (i-j))) {	/* in sequence of UIDs */
			  if ( i < nmsgs) continue;	/* may be more, check next */
			  PBOUT (':'); pnum(iuid);	/* done with all, tie it off */
			  j = i; juid= iuid;
			} else {	/* break in sequence of UIDs */
			  if ((i-1) > j) {	/* prev sequence, tie it off */
			    j= i-1; juid= mail_uid (stream,j);
			    PBOUT (':'); pnum(juid);
			  }
			  PBOUT (','); pnum(iuid);
			  j = i; juid= iuid;	/* record last done message/UID */
			}
		      } else {	/* this message doesn't match, have a pending sequence? */
			/* if pending sequence, tie it off & reset flags */
			if ((i-1) > j) {	/* prev sequence, tie it off */
			  j= i-1; juid= mail_uid (stream,j);
			  PBOUT (':'); pnum(juid);
			}
			j= nmsgs+1; juid= ULONG_MAX;	/* flag that we're not in a sequence of matches */
		      }
		    }
		  } else {	/* doing message-IDs, use MRC optimization */
		    while (++i <= nmsgs) {
		      if (mail_elt (stream,i)->searched) {
		        while ((++i <= nmsgs) && mail_elt (stream,i)->searched);
				/* previous message is end of range */
		        if (j != --i) {
	 		  PBOUT (':');
			  pnum (i);
		        }
		    }
				/* search for next match */
		      while ((++i <= nmsgs) && !mail_elt (stream,i)->searched);
		      if (i <= nmsgs) {
		        PBOUT (',');
		        pnum (i);
		        j = i;	/* last message output */
		      }
		    }
		  }
		}
				/* wants COUNT */
		if (retval & 0x10) {
		  unsigned long j;
		  for (i = 1, j = 0; i <= nmsgs; ++i)
		    if (mail_elt (stream,i)->searched) ++j;
		  PSOUT (" COUNT ");
		  pnum (j);
		}
	      }
	      else {		/* standard search */
		PSOUT ("* SEARCH");
		for (i = 1; i <= nmsgs; ++i)
		  if (mail_elt (stream,i)->searched) {
		    PBOUT (' ');
		    pnum (uid ? mail_uid (stream,i) : i);
		  }
	      }
	      CRLF;
	    }
	  }
	  else mail_free_searchpgm (&pgm);
	  if (charset) fs_give ((void **) &charset);
	}

	else			/* fall into select case */
      case SELECT:		/* valid whenever logged in */
				/* select new mailbox */
	  if (!(strcmp (cmd,"SELECT") && strcmp (cmd,"EXAMINE") &&
		strcmp (cmd,"BBOARD"))) {
				/* single argument */
	  if (!(s = snarf (&arg))) response = misarg;
	  else if (arg) response = badarg;
	  else if (nameok (NIL,s = bboardname (cmd,s))) {
	    DRIVER *factory = mail_valid (NIL,s,NIL);
	    f = anonymous ? OP_ANONYMOUS | OP_READONLY :
	      (((blackberry > 0) || (*cmd == 'S')) ? NIL : OP_READONLY);
	    curdriver = NIL;	/* no drivers known */
				/* no last uid */
	    uidvalidity = lastuid = 0;
	    if (lastid) fs_give ((void **) &lastid);
	    if (lastst.data) fs_give ((void **) &lastst.data);
	    nflags = 0;		/* force update */
	    nmsgs = recent = 0xffffffff;
	    if (factory && !strcmp (factory->name,"phile") &&
		(stream = mail_open (stream,s,f | OP_SILENT)) &&
		(response == win)) {
	      BODY *b;
				/* see if proxy open */
	      if ((mail_elt (stream,1)->rfc822_size < 400) &&
		  mail_fetchstructure (stream,1,&b) && (b->type == TYPETEXT) &&
		  (t = mail_fetch_text (stream,1,NIL,&i,NIL)) &&
		  (i < MAILTMPLEN) && (t[0] == '{')) {
				/* copy and tie off */
		strncpy (tmp,t,i)[i] = '\0';
				/* nuke any trailing newline */
		if ((t = strpbrk (tmp,"\r\n")) != NULL) *t = '\0';
				/* try to open proxy */
		if ((tstream = mail_open (NIL,tmp,f | OP_SILENT)) &&
		    (response == win) && tstream->nmsgs) {
		  s = tmp;	/* got it, close the link */
		  mail_close (stream);
		  stream = tstream;
		  tstream = NIL;
		}
	      }
				/* now give the exists event */
	      stream->silent = NIL;
	      mm_exists (stream,stream->nmsgs);
	    }
	    else if (!factory && isnewsproxy (s)) {
	      sprintf (tmp,"{%.300s/nntp}%.300s",nntpproxy,(char *) s+6);
	      stream = mail_open (stream,tmp,f);
	    }
				/* open stream normally then */
	    else stream = mail_open (stream,s,f);

	    if (stream && (response == win)) {
	      state = OPEN;	/* note state open */
	      if (lastsel) fs_give ((void **) &lastsel);
				/* canonicalize INBOX */
	      if (!compare_cstring (s,"#MHINBOX"))
		lastsel = cpystr ("#MHINBOX");
	      else lastsel = cpystr (compare_cstring (s,"INBOX") ?
				     (char *) s : "INBOX");
				/* note readonly/readwrite */
	      response = stream->rdonly ? rowin : rwwin;
	      if (anonymous)
		syslog (LOG_INFO,"Anonymous select of %.80s host=%.80s",
			stream->mailbox,tcp_clienthost ());
	      lastcheck = 0;	/* no last check */
	    }
	    else {		/* failed, nuke old selection */
	      if (stream) stream = mail_close (stream);
	      state = SELECT;	/* no mailbox open now */
	      if (lastsel) fs_give ((void **) &lastsel);
	      response = lose;	/* open failed */
	    }
	  }
	}

				/* APPEND message to mailbox */
	else if (!(anonymous || strcmp (cmd,"APPEND"))) {
				/* parse mailbox name */
	  if ((s = snarf (&arg)) && arg) {
	    STRING st;		/* message stringstruct */
	    APPENDDATA ad;
	    ad.arg = arg;	/* command arguments */
				/* no message yet */
	    ad.flags = ad.date = ad.msg = NIL;
	    ad.message = &st;	/* pointer to stringstruct to use */
	    trycreate = NIL;	/* no trycreate status */
	    if (!mail_append_multiple (NIL,s,append_msg,(void *) &ad)) {
	      if (response == win) response = trycreate ? losetry : lose;
				/* this can happen with #driver. hack */
	      if (!lsterr) lsterr = cpystr ("No such destination mailbox");
	    }
				/* clean up any message text left behind */
	    if (ad.flags) fs_give ((void **) &ad.flags);
	    if (ad.date) fs_give ((void **) &ad.date);
	    if (ad.msg) fs_give ((void **) &ad.msg);
	  }
	  else response = misarg;
	  if (stream)		/* allow untagged EXPUNGE */
	    mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
	}
				/* list mailboxes */
	else if (!strcmp (cmd,"LIST") || !strcmp (cmd,"RLIST")) {
				/* get reference and mailbox argument */
	  if (!((s = snarf (&arg)) && (t = snarf_list (&arg))))
	    response = misarg;
	  else if (arg) response = badarg;
				/* make sure anonymous can't do bad things */
	  else if (nameok (s,t)) {
	    if (newsproxypattern (s,t,tmp,LONGT)) {
	      proxylist = T;
	      mail_list (NIL,"",tmp);
	      proxylist = NIL;
	    }
	    else mail_list (NIL,s,t);
	  }
	  if (stream)		/* allow untagged EXPUNGE */
	    mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
	}
				/* scan mailboxes */
	else if (!strcmp (cmd,"SCAN")) {
				/* get arguments */
	  if (!((s = snarf (&arg)) && (t = snarf_list (&arg)) &&
		(u = snarf (&arg)))) response = misarg;
	  else if (arg) response = badarg;
				/* make sure anonymous can't do bad things */
	  else if (nameok (s,t)) {
	    if (newsproxypattern (s,t,tmp,NIL))
	      mm_log ("SCAN not permitted for news",ERROR);
	    else mail_scan (NIL,s,t,u);
	  }
	  if (stream)		/* allow untagged EXPUNGE */
	    mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
	}
				/* list subscribed mailboxes */
	else if (!strcmp (cmd,"LSUB") || !strcmp (cmd,"RLSUB")) {
				/* get reference and mailbox argument */
	  if (!((s = snarf (&arg)) && (t = snarf_list (&arg))))
	    response = misarg;
	  else if (arg) response = badarg;
				/* make sure anonymous can't do bad things */
	  else if (nameok (s,t)) {
	    if (newsproxypattern (s,t,tmp,NIL)) newsrc_lsub (NIL,tmp);
	    else mail_lsub (NIL,s,t);
	  }
	  if (stream)		/* allow untagged EXPUNGE */
	    mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
	}

				/* find mailboxes */
	else if (!strcmp (cmd,"FIND")) {
				/* get subcommand and true argument */
	  if (!(arg && (s = strtok_r (arg," \015\012",&sstate)) &&
		(s == cmd + 5) && (cmd[4] = ' ') && ucase (s) &&
		(arg = strtok_r (NIL,"\015\012",&sstate)) &&
		(s = snarf_list (&arg))))
	    response = misarg;	/* missing required argument */
	  else if (arg) response = badarg;
				/* punt on single-char wildcards */
	  else if (strpbrk (s,"%?")) response =
	    "%.80s NO IMAP2 ? and %% wildcards not supported: %.80s\015\012";
	  else if (nameok (NIL,s)) {
	    finding = T;	/* note that we are FINDing */
				/* dispatch based on type */
	    if (!strcmp (cmd,"FIND MAILBOXES") && !anonymous)
	      mail_lsub (NIL,NIL,s);
	    else if (!strcmp (cmd,"FIND ALL.MAILBOXES")) {
				/* convert * to % for compatible behavior */
	      for (t = s; *t; t++) if (*t == '*') *t = '%';
	      mail_list (NIL,NIL,s);
	    }
	    else response = badcmd;
	  }
	  if (stream)		/* allow untagged EXPUNGE */
	    mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
	}

				/* status of mailbox */
	else if (!strcmp (cmd,"STATUS")) {
	  if (!((s = snarf (&arg)) && arg && (*arg++ == '(') &&
		(t = strchr (arg,')')) && (t - arg) && !t[1]))
	    response = misarg;
	  else {
	    f = NIL;		/* initially no flags */
	    *t = '\0';		/* tie off flag string */
				/* read flags */
	    t = strtok_r (ucase (arg)," ",&sstate);
	    do {		/* parse each one; unknown generate warning */
	      if (!strcmp (t,"MESSAGES")) f |= SA_MESSAGES;
	      else if (!strcmp (t,"RECENT")) f |= SA_RECENT;
	      else if (!strcmp (t,"UNSEEN")) f |= SA_UNSEEN;
	      else if (!strcmp (t,"UIDNEXT")) f |= SA_UIDNEXT;
	      else if (!strcmp (t,"UIDVALIDITY")) f |= SA_UIDVALIDITY;
	      else {
		PSOUT ("* NO Unknown status flag ");
		PSOUT (t);
		CRLF;
	      }
	    } while ((t = strtok_r (NIL," ",&sstate)) != NULL);
	    ping_mailbox (uid);	/* in case the fool did STATUS on open mbx */
	    PFLUSH ();		/* make sure stdout is dumped in case slave */
	    if (!compare_cstring (s,"INBOX")) s = "INBOX";
	    else if (!compare_cstring (s,"#MHINBOX")) s = "#MHINBOX";
	    if (state == LOGOUT) response = lose;
				/* get mailbox status */
	    else if (lastsel && (!strcmp (s,lastsel) ||
				 (stream && !strcmp (s,stream->mailbox)))) {
	      unsigned long unseen;
				/* snarl at cretins which do this */
	      PSOUT ("* NO CLIENT BUG DETECTED: STATUS on selected mailbox: ");
	      PSOUT (s);
	      CRLF;
	      tmp[0] = ' '; tmp[1] = '\0';
	      if (f & SA_MESSAGES)
		sprintf (tmp + strlen (tmp)," MESSAGES %lu",stream->nmsgs);
	      if (f & SA_RECENT)
		sprintf (tmp + strlen (tmp)," RECENT %lu",stream->recent);
	      if (f & SA_UNSEEN) {
		for (i = 1,unseen = 0; i <= stream->nmsgs; i++)
		  if (!mail_elt (stream,i)->seen) unseen++;
		sprintf (tmp + strlen (tmp)," UNSEEN %lu",unseen);
	      }
	      if (f & SA_UIDNEXT)
		sprintf (tmp + strlen (tmp)," UIDNEXT %lu",stream->uid_last+1);
	      if (f & SA_UIDVALIDITY)
		sprintf (tmp + strlen(tmp)," UIDVALIDITY %lu",
			 stream->uid_validity);
	      tmp[1] = '(';
	      strcat (tmp,")\015\012");
	      PSOUT ("* STATUS ");
	      pastring (s);
	      PSOUT (tmp);
	    }
	    else if (isnewsproxy (s)) {
	      sprintf (tmp,"{%.300s/nntp}%.300s",nntpproxy,(char *) s+6);
	      if (!mail_status (NIL,tmp,f)) response = lose;
	    }
	    else if (!mail_status (NIL,s,f)) response = lose;
	  }
	  if (stream)		/* allow untagged EXPUNGE */
	    mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
	}

				/* subscribe to mailbox */
	else if (!(anonymous || strcmp (cmd,"SUBSCRIBE"))) {
				/* get <mailbox> or MAILBOX <mailbox> */
	  if (!(s = snarf (&arg))) response = misarg;
	  else if (arg) {	/* IMAP2bis form */
	    if (compare_cstring (s,"MAILBOX")) response = badarg;
	    else if (!(s = snarf (&arg))) response = misarg;
	    else if (arg) response = badarg;
	    else mail_subscribe (NIL,s);
	  }
	  else if (isnewsproxy (s)) newsrc_update (NIL,s+6,':');
	  else mail_subscribe (NIL,s);
	  if (stream)		/* allow untagged EXPUNGE */
	    mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
	}
				/* unsubscribe to mailbox */
	else if (!(anonymous || strcmp (cmd,"UNSUBSCRIBE"))) {
				/* get <mailbox> or MAILBOX <mailbox> */
	  if (!(s = snarf (&arg))) response = misarg;
	  else if (arg) {	/* IMAP2bis form */
	    if (compare_cstring (s,"MAILBOX")) response = badarg;
	    else if (!(s = snarf (&arg))) response = misarg;
	    else if (arg) response = badarg;
	    else if (isnewsproxy (s)) newsrc_update (NIL,s+6,'!');
	    else mail_unsubscribe (NIL,s);
	  }
	  else mail_unsubscribe (NIL,s);
	  if (stream)		/* allow untagged EXPUNGE */
	    mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
	}

	else if (!strcmp (cmd,"NAMESPACE")) {
	  if (arg) response = badarg;
	  else {
	    NAMESPACE **ns = (NAMESPACE **) mail_parameters(NIL,GET_NAMESPACE,
							     NIL);
	    NAMESPACE *n;
	    PARAMETER *p;
	    PSOUT ("* NAMESPACE");
	    if (ns) for (i = 0; i < 3; i++) {
	      if ((n = ns[i]) != NULL) {
		PSOUT (" (");
		do {
		  PBOUT ('(');
		  pstring (n->name);
		  switch (n->delimiter) {
		  case '\\':	/* quoted delimiter */
		  case '"':
		    PSOUT (" \"\\\\\"");
		    break;
		  case '\0':	/* no delimiter */
		    PSOUT (" NIL");
		    break;
		  default:	/* unquoted delimiter */
		    PSOUT (" \"");
		    PBOUT (n->delimiter);
		    PBOUT ('"');
		    break;
		  }
				/* NAMESPACE extensions are hairy */
		  if ((p = n->param) != NULL) do {
		    PBOUT (' ');
		    pstring (p->attribute);
		    PSOUT (" (");
		    do pstring (p->value);
		    while (p->next && !p->next->attribute && (p = p->next));
		    PBOUT (')');
		  } while ((p = p->next) != NULL);
		  PBOUT (')');
		} while ((n = n->next) != NULL);
		PBOUT (')');
	      }
	      else PSOUT (" NIL");
	    }
	    else PSOUT (" NIL NIL NIL");
	    CRLF;
	  }
	  if (stream)		/* allow untagged EXPUNGE */
	    mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
	}

				/* create mailbox */
	else if (!(anonymous || strcmp (cmd,"CREATE"))) {
	  if (!(s = snarf (&arg))) response = misarg;
	  else if (arg) response = badarg;
	  else mail_create (NIL,s);
	  if (stream)		/* allow untagged EXPUNGE */
	    mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
	}
				/* delete mailbox */
	else if (!(anonymous || strcmp (cmd,"DELETE"))) {
	  if (!(s = snarf (&arg))) response = misarg;
	  else if (arg) response = badarg;
	  else {		/* make sure not selected */
	    if (lastsel && (!strcmp (s,lastsel) ||
			    (stream && !strcmp (s,stream->mailbox))))
	      mm_log ("Can not DELETE the selected mailbox",ERROR);
	    else mail_delete (NIL,s);
	  }
	  if (stream)		/* allow untagged EXPUNGE */
	    mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
	}
				/* rename mailbox */
	else if (!(anonymous || strcmp (cmd,"RENAME"))) {
	  if (!((s = snarf (&arg)) && (t = snarf (&arg)))) response = misarg;
	  else if (arg) response = badarg;
	  else {		/* make sure not selected */
	    if (!compare_cstring (s,"INBOX")) s = "INBOX";
	    else if (!compare_cstring (s,"#MHINBOX")) s = "#MHINBOX";
	    if (lastsel && (!strcmp (s,lastsel) ||
			    (stream && !strcmp (s,stream->mailbox))))
	      mm_log ("Can not RENAME the selected mailbox",ERROR);
	    else mail_rename (NIL,s,t);
	  }
	  if (stream)		/* allow untagged EXPUNGE */
	    mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,(void *) stream);
	}

				/* idle mode */
	else if (!strcmp (cmd,"IDLE")) {
				/* no arguments */
	  if (arg) response = badarg;
	  else {		/* tell client ready for argument */
	    unsigned long donefake = 0;
	    PSOUT ("+ Waiting for DONE\015\012");
	    PFLUSH ();		/* dump output buffer */
				/* inactivity countdown */
	    i = ((TIMEOUT) / (IDLETIMER)) + 1;
	    do {		/* main idle loop */
	      if (!donefake) {	/* don't ping mailbox if faking */
		mail_parameters (stream,SET_ONETIMEEXPUNGEATPING,
				 (void *) stream);
		ping_mailbox (uid);
				/* maybe do a checkpoint if not anonymous */
		if (!anonymous && stream &&
		    (time (0) > (lastcheck + CHECKTIMER))) {
		  mail_check (stream);
				/* cancel likely altwin from mail_check() */
		  if (lsterr) fs_give ((void **) &lsterr);
		  if (lstwrn) fs_give ((void **) &lstwrn);
				/* remember last checkpoint */
		  lastcheck = time (0);
		}
	      }
	      if (lstwrn) {	/* have a warning? */
		PSOUT ("* NO ");
		PSOUT (lstwrn);
		CRLF;
		fs_give ((void **) &lstwrn);
	      }
	      if (!(i % 2)) {	/* prevent NAT timeouts */
		sprintf (tmp,"* OK Timeout in %lu minutes\015\012",
			 (i * IDLETIMER) / 60);
		PSOUT (tmp);
	      }
				/* two minutes before the end... */
	      if ((state == OPEN) && (i <= 2)) {
		sprintf (tmp,"* %lu EXISTS\015\012* %lu RECENT\015\012",
			 donefake = nmsgs + 1,recent + 1);
		PSOUT (tmp);	/* prod client to wake up */
	      }
	      PFLUSH ();	/* dump output buffer */
	    } while ((state != LOGOUT) && !INWAIT (IDLETIMER) && --i);

				/* time to exit idle loop */
	    if (state != LOGOUT) {
	      if (i) {		/* still have time left? */
				/* yes, read expected DONE */
		slurp (tmp,MAILTMPLEN,INPUTTIMEOUT);
		if (((tmp[0] != 'D') && (tmp[0] != 'd')) ||
		    ((tmp[1] != 'O') && (tmp[1] != 'o')) ||
		    ((tmp[2] != 'N') && (tmp[2] != 'n')) ||
		    ((tmp[3] != 'E') && (tmp[3] != 'e')) ||
		    (((tmp[4] != '\015') || (tmp[5] != '\012')) &&
		     (tmp[4] != '\012')))
		  response = "%.80s BAD Bogus IDLE continuation\015\012";
		if (donefake) {	/* if faking at the end */
				/* send EXPUNGE (should be just 1) */
		  while (donefake > nmsgs) {
		    sprintf (tmp,"* %lu EXPUNGE\015\012",donefake--);
		    PSOUT (tmp);
		  }
		  sprintf (tmp,"* %lu EXISTS\015\012* %lu RECENT\015\012",
			   nmsgs,recent);
		  PSOUT (tmp);
		}
	      }
	      else clkint ();	/* otherwise do autologout action */
	    }
	  }
	}
	else response = badcmd;
	break;
      default:
        response = "%.80s BAD Unknown state for %.80s command\015\012";
	break;
      }

      while (litplus.ok) {	/* any unread LITERAL+? */
	litplus.ok = NIL;	/* yes, cancel it now */
	clearerr (stdin);	/* clear stdin errors */
	status = "discarding unread literal";
				/* read literal and discard it */
	while ((i = (litplus.size > MAILTMPLEN) ? MAILTMPLEN : litplus.size) != 0L){
	  if (state == LOGOUT) litplus.size = 0;
	  else {
	    settimeout (INPUTTIMEOUT);
	    if (PSINR (tmp,i)) litplus.size -= i;
	    else {
	      ioerror (stdin,status);
	      litplus.size = 0;	/* in case it continues */
	    }
	  }
	}
	settimeout (0);		/* stop timeout */
				/* get new command tail */
	slurp (tmp,MAILTMPLEN,INPUTTIMEOUT);
				/* locate end of line */
	if ((t = strchr (tmp,'\012')) != NULL) {
				/* back over CR */
	  if ((t > tmp) && (t[-1] == '\015')) --t;
	  *t = NIL;		/* tie off CRLF */
				/* possible LITERAL+? */
	  if (((i = strlen (tmp)) > 3) && (tmp[i - 1] == '}') &&
	      (tmp[i - 2] == '+') && isdigit (tmp[i - 3])) {
				/* back over possible count */
	    for (i -= 4; i && isdigit (tmp[i]); i--);
	    if (tmp[i] == '{') {	/* found a literal? */
	      litplus.ok = T;	/* yes, note LITERAL+ in effect, set size */
	      litplus.size = strtoul (tmp + i + 1,NIL,10);
	    }
	  }
	}
	else flush ();		/* overlong line after LITERAL+, punt */
      }
      ping_mailbox (uid);	/* update mailbox status before response */
      if (lstwrn && lsterr) {	/* output most recent warning */
	PSOUT ("* NO ");
	PSOUT (lstwrn);
	CRLF;
	fs_give ((void **) &lstwrn);
      }

      if (response == logwin) {	/* authentication win message */
	sprintf (tmp,response,lstref ? "*" : tag);
	PSOUT (tmp);		/* start response */
	pcapability (1);	/* print logged-in capabilities */
	PSOUT ("] User ");
	PSOUT (user);
	PSOUT (" authenticated\015\012");
	if (lstref) {
	  sprintf (tmp,response,tag);
	  PSOUT (tmp);		/* start response */
	  PSOUT ("[REFERRAL ");
	  PSOUT (lstref);
	  PSOUT ("] ");
	  PSOUT (lasterror ());
	  CRLF;
	}
      }
      else if ((response == win) || (response == lose)) {
	sprintf (tmp,response,tag);
	PSOUT (tmp);
	if (cauidvalidity) {	/* COPYUID/APPENDUID response? */
	  sprintf (tmp,"[%.80sUID %lu ",(char *)
		   ((s = strchr (cmd,' ')) ? s+1 : cmd),cauidvalidity);
	  PSOUT (tmp);
	  cauidvalidity = 0;	/* cancel response for future */
	  if (csset) {
	    pset (&csset);
	    PBOUT (' ');
	  }
	  pset (&caset);
	  PSOUT ("] ");
	}
	else if (lstref) {	/* have a referral? */
	  PSOUT ("[REFERRAL ");
	  PSOUT (lstref);
	  PSOUT ("] ");
	}
	if (lsterr || lstwrn) PSOUT (lasterror ());
	else {
	  PSOUT (cmd);
	  PSOUT ((response == win) ? " completed" : "failed");
	}
	CRLF;
      }
      else {			/* normal response */
	if ((response == rowin) || (response == rwwin)) {
	  if (lstwrn) {		/* output most recent warning */
	    PSOUT ("* NO ");
	    PSOUT (lstwrn);
	    CRLF;
	    fs_give ((void **) &lstwrn);
	  }
	}
	sprintf (tmp,response,tag,cmd,lasterror ());
	PSOUT (tmp);		/* output response */
      }
    }
    PFLUSH ();			/* make sure output blatted */

    if (autologouttime) {	/* have an autologout in effect? */
				/* cancel if no longer waiting for login */
      if (state != LOGIN) autologouttime = 0;
				/* took too long to login */
      else if (autologouttime < time (0)) {
	logout = goodbye = "Autologout";
	stream = NIL;
	state = LOGOUT;		/* sayonara */
      }
    }
  }
  if (goodbye && !quell_events){/* have a goodbye message? */
    PSOUT ("* BYE ");		/* utter it */
    PSOUT (goodbye);
    CRLF;
    PFLUSH ();			/* make sure blatted */
  }
  syslog (LOG_INFO,"%s user=%.80s host=%.80s",logout,
	  user ? (char *) user : "???",tcp_clienthost ());
				/* do logout hook if needed */
  if ((lgoh = (logouthook_t) mail_parameters (NIL,GET_LOGOUTHOOK,NIL)) != NULL)
    (*lgoh) (mail_parameters (NIL,GET_LOGOUTDATA,NIL));
  _exit (ret);			/* all done */
  return ret;			/* stupid compilers */
}

/* Ping mailbox during each cycle.  Also check alerts
 * Accepts: last command was UID flag
 */

void ping_mailbox (unsigned long uid)
{
  unsigned long i;
  char tmp[MAILTMPLEN];
  if (state == OPEN) {
    if (!mail_ping (stream)) {	/* make sure stream still alive */
      PSOUT ("* BYE ");
      PSOUT (mylocalhost ());
      PSOUT (" Fatal mailbox error: ");
      PSOUT (lasterror ());
      CRLF;
      stream = NIL;		/* don't try to clean up stream */
      state = LOGOUT;		/* go away */
      syslog (LOG_INFO,
	      "Fatal mailbox error user=%.80s host=%.80s mbx=%.80s: %.80s",
	      user ? (char *) user : "???",tcp_clienthost (),
	      (stream && stream->mailbox) ? stream->mailbox : "???",
	      lasterror ());
      return;
    }
				/* change in number of messages? */
    if (existsquelled || (nmsgs != stream->nmsgs)) {
      PSOUT ("* ");
      pnum (nmsgs = stream->nmsgs);
      PSOUT (" EXISTS\015\012");
    }
				/* change in recent messages? */
    if (existsquelled || (recent != stream->recent)) {
      PSOUT ("* ");
      pnum (recent = stream->recent);
      PSOUT (" RECENT\015\012");
    }
    existsquelled = NIL;	/* don't do this until asked again */
    if (stream->uid_validity && (stream->uid_validity != uidvalidity)) {
      PSOUT ("* OK [UIDVALIDITY ");
      pnum (stream->uid_validity);
      PSOUT ("] UID validity status\015\012* OK [UIDNEXT ");
      pnum (stream->uid_last + 1);
      PSOUT ("] Predicted next UID\015\012");
      if (stream->uid_nosticky) {
	PSOUT ("* NO [UIDNOTSTICKY] Non-permanent unique identifiers: ");
	PSOUT (stream->mailbox);
	CRLF;
      }
      uidvalidity = stream->uid_validity;
    }

				/* don't bother if driver changed */
    if (curdriver == stream->dtb) {
				/* first report any new flags */
      if ((nflags < NUSERFLAGS) && stream->user_flags[nflags])
	new_flags (stream);
      for (i = 1; i <= nmsgs; i++) if (mail_elt (stream,i)->spare2) {
	PSOUT ("* ");
	pnum (i);
	PSOUT (" FETCH (");
	fetch_flags (i,NIL);	/* output changed flags */
	if (uid) {		/* need to include UIDs in response? */
	  PBOUT (' ');
	  fetch_uid (i,NIL);
	}
	PSOUT (")\015\012");
      }
    }
    else {			/* driver changed */
      new_flags (stream);	/* send mailbox flags */
      if (curdriver) {		/* note readonly/write if possible change */
	PSOUT ("* OK [READ-");
	PSOUT (stream->rdonly ? "ONLY" : "WRITE");
	PSOUT ("] Mailbox status\015\012");
      }
      curdriver = stream->dtb;
      if (nmsgs) {		/* get flags for all messages */
	sprintf (tmp,"1:%lu",nmsgs);
	mail_fetch_flags (stream,tmp,NIL);
				/* don't do this if newsrc already did */
	if (!(curdriver->flags & DR_NEWS)) {
				/* find first unseen message */
	  for (i = 1; i <= nmsgs && mail_elt (stream,i)->seen; i++);
	  if (i <= nmsgs) {
	    PSOUT ("* OK [UNSEEN ");
	    pnum (i);
	    PSOUT ("] first unseen message in ");
	    PSOUT (stream->mailbox);
	    CRLF;
	  }
	}
      }
    }
  }
  if (shutdowntime && (time (0) > shutdowntime + SHUTDOWNTIMER)) {
    PSOUT ("* BYE Server shutting down\015\012");
    state = LOGOUT;
  }
				/* don't do these stat()s every cycle */
  else if (time (0) > alerttime + ALERTTIMER) { 
    struct stat sbuf;
				/* have a shutdown file? */
    if (!stat (SHUTDOWNFILE,&sbuf)) {
      PSOUT ("* OK [ALERT] Server shutting down shortly\015\012");
      shutdowntime = time (0);
    }
    alerttime = time (0);	/* output any new alerts */
    sysalerttime = palert (ALERTFILE,sysalerttime);
    if (state != LOGIN)		/* do user alert if logged in */
      useralerttime = palert (mailboxfile (tmp,USERALERTFILE),useralerttime);
  }
}

/* Print an alert file
 * Accepts: path of alert file
 *	    time of last printed alert file
 * Returns: updated time of last printed alert file
 */

time_t palert (char *file,time_t oldtime)
{
  FILE *alf;
  struct stat sbuf;
  int c,lc = '\012';
				/* have a new alert file? */
  if (stat (file,&sbuf) || (sbuf.st_mtime <= oldtime) ||
      !(alf = fopen (file,"r"))) return oldtime;
				/* yes, display it */
  while ((c = getc (alf)) != EOF) {
    if (lc == '\012') PSOUT ("* OK [ALERT] ");
    switch (c) {		/* output character */
    case '\012':		/* newline means do CRLF */
      CRLF;
    case '\015':		/* flush CRs */
    case '\0':			/* flush nulls */
      break;
    default:
      PBOUT (c);		/* output all other characters */
      break;
    }
    lc = c;			/* note previous character */
  }
  fclose (alf);
  if (lc != '\012') CRLF;	/* final terminating CRLF */
  return sbuf.st_mtime;		/* return updated last alert time */
}

/* Initialize file string structure for file stringstruct
 * Accepts: string structure
 *	    pointer to message data structure
 *	    size of string
 */

void msg_string_init (STRING *s,void *data,unsigned long size)
{
  MSGDATA *md = (MSGDATA *) data;
  s->data = data;		/* note stream/msgno and header length */
#if 0
  s->size = size;		/* message size */
  s->curpos = s->chunk =	/* load header */
    mail_fetchheader_full (md->stream,md->msgno,NIL,&s->data1,
			   FT_PREFETCHTEXT | FT_PEEK);
#else	/* This kludge is necessary because of broken mail stores */
  mail_fetchtext_full (md->stream,md->msgno,&s->size,FT_PEEK);
  s->curpos = s->chunk =	/* load header */
    mail_fetchheader_full (md->stream,md->msgno,NIL,&s->data1,FT_PEEK);
  s->size += s->data1;		/* header + body size */
#endif
  s->cursize = s->chunksize = s->data1;
  s->offset = 0;		/* offset is start of message */
}


/* Get next character from file stringstruct
 * Accepts: string structure
 * Returns: character, string structure chunk refreshed
 */

char msg_string_next (STRING *s)
{
  char c = *s->curpos++;	/* get next byte */
  SETPOS (s,GETPOS (s));	/* move to next chunk */
  return c;			/* return the byte */
}


/* Set string pointer position for file stringstruct
 * Accepts: string structure
 *	    new position
 */

void msg_string_setpos (STRING *s,unsigned long i)
{
  MSGDATA *md = (MSGDATA *) s->data;
  if (i < s->data1) {		/* want header? */
    s->chunk = mail_fetchheader_full (md->stream,md->msgno,NIL,NIL,FT_PEEK);
    s->chunksize = s->data1;	/* header length */
    s->offset = 0;		/* offset is start of message */
  }
  else if (i < s->size) {	/* want body */
    s->chunk = mail_fetchtext_full (md->stream,md->msgno,NIL,FT_PEEK);
    s->chunksize = s->size - s->data1;
    s->offset = s->data1;	/* offset is end of header */
  }
  else {			/* off end of message */
    s->chunk = NIL;		/* make sure that we crack on this then */
    s->chunksize = 1;		/* make sure SNX cracks the right way... */
    s->offset = i;
  }
				/* initial position and size */
  s->curpos = s->chunk + (i -= s->offset);
  s->cursize = s->chunksize - i;
}

/* Send flags for stream
 * Accepts: MAIL stream
 *	    scratch buffer
 */

void new_flags (MAILSTREAM *stream)
{
  int i,c;
  PSOUT ("* FLAGS (");
  for (i = 0; i < NUSERFLAGS; i++) if (stream->user_flags[i]) {
    PSOUT (stream->user_flags[i]);
    PBOUT (' ');
    nflags = i + 1;
  }
  PSOUT ("\\Answered \\Flagged \\Deleted \\Draft \\Seen)\015\012* OK [PERMANENTFLAGS (");
  for (i = c = 0; i < NUSERFLAGS; i++)
    if ((stream->perm_user_flags & (1 << i)) && stream->user_flags[i])
      put_flag (&c,stream->user_flags[i]);
  if (stream->kwd_create) put_flag (&c,"\\*");
  if (stream->perm_answered) put_flag (&c,"\\Answered");
  if (stream->perm_flagged) put_flag (&c,"\\Flagged");
  if (stream->perm_deleted) put_flag (&c,"\\Deleted");
  if (stream->perm_draft) put_flag (&c,"\\Draft");
  if (stream->perm_seen) put_flag (&c,"\\Seen");
  PSOUT (")] Permanent flags\015\012");
}

/* Set timeout
 * Accepts: desired interval
 */

void settimeout (unsigned int i)
{
				/* limit if not logged in */
  if (i) alarm ((state == LOGIN) ? LOGINTIMEOUT : i);
  else alarm (0);
}


/* Clock interrupt
 * Returns only if critical code in progress
 */

void clkint (void)
{
  settimeout (SIGNALTIMER);	/* disable most interrupts */
  server_init (NIL,NIL,NIL,dieint,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN);
  logout = "Autologout";
  goodbye = "Autologout (idle for too long)";
  if (critical) state = LOGOUT;	/* must defer if in critical code */
  else longjmp (jmpenv,1);	/* die now */
}

/* Clock interrupt after signal
 * Never returns
 */

void dieint (void)
{
  _exit(1);			/* slay the beast.  Now. */
}


/* Kiss Of Death interrupt
 * Returns only if critical code in progress
 */

void kodint (void)
{
  settimeout (SIGNALTIMER);	/* disable most interrupts */
  server_init (NIL,NIL,NIL,dieint,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN);
  logout = goodbye = "Killed (lost mailbox lock)";
  if (critical) state = LOGOUT;	/* must defer if in critical code */
  else longjmp (jmpenv,1);	/* die now */
}

/* Hangup interrupt
 * Returns only if critical code in progress
 */

void hupint (void)
{
  settimeout (SIGNALTIMER);	/* disable most interrupts */
  server_init (NIL,NIL,NIL,dieint,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN);
  logout = "Hangup";
  goodbye = NIL;		/* other end is already gone */
  if (critical) state = LOGOUT;	/* must defer if in critical code */
  else longjmp (jmpenv,1);	/* die now */
}


/* Termination interrupt
 * Returns only if critical code in progress
 */

void trmint (void)
{
  settimeout (SIGNALTIMER);	/* disable most interrupts */
  server_init (NIL,NIL,NIL,dieint,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN);
  logout = goodbye = "Killed (terminated)";
  /* Make no attempt at graceful closure since a shutdown may be in
   * progress, and we won't have any time to do mail_close() actions
   */
  stream = NIL;
  if (critical) state = LOGOUT;	/* must defer if in critical code */
  else longjmp (jmpenv,1);	/* die now */
}

/* The routines on this and the next page eschew the use of non-syscall libc
 * routines (especially stdio) for a reason.  Also, these hideous #if
 * condtionals need to be replaced.
 */

#ifndef unix
#define unix 0
#endif


/* Status request interrupt
 * Always returns
 */

void staint (void)
{
#if unix
  int fd;
  char *s,buf[8*MAILTMPLEN];
  unsigned long pid = getpid ();
				/* build file name */
  s = nout (sout (buf,"/tmp/imapd-status."),pid,10);
  if (user) s = sout (sout (s,"."),user);
  *s = '\0';			/* tie off file name */
  if ((fd = open (buf,O_WRONLY | O_CREAT | O_TRUNC,0666)) >= 0) {
    fchmod (fd,0666);
    s = nout (sout (buf,"PID="),pid,10);
    switch (state) {
    case LOGIN:
      s = sout (s,", not logged in");
      break;
    case SELECT:
      s = sout (s,", logged in");
      break;
    case OPEN:
      s = sout (s,", mailbox open");
      break;
    case LOGOUT:
      s = sout (s,", logging out");
      break;
    }
    if (user) {
      s = sout (sout (s,"\nuser="),user);
    }
    if (blackberry) {
      /* Don't report client host until Blackberryness known.  This is
	 because tcp_clienthost() may not have been called yet and so the
	 string might not be cached.  As this is a signal handler, we want to
	 minimize any system calls.
       */
      s = sout (sout (s,"\nhost="),tcp_clienthost ());
      if (blackberry > 0) s = sout (s, " (blackberry)");
    }
    if (stream && stream->mailbox) {
      s = sout (sout (sout (s,"\nmailbox="),stream->mailbox),
		stream->rdonly ? " (read-only)" : " (read-write)");
    }
    *s++ = '\n';
    if (status) {
      s = sout (s,status);
      if (cmd) s = sout (sout (s,", last command="),cmd);
    }
    else if (cmd) s = sout (sout (s,cmd)," in progress");
    else s = sout (s,"UNKNOWN STATE");
    *s++ = '\n';
    write (fd,buf,s-buf);
    close (fd);
  }
#endif
}

/* Write string
 * Accepts: destination string pointer
 *	    string
 * Returns: updated string pointer
 */

char *sout (char *s,char *t)
{
  while (*t) *s++ = *t++;
  return s;
}


/* Write number
 * Accepts: destination string pointer
 *	    number
 *	    base
 * Returns: updated string pointer
 */

char *nout (char *s,unsigned long n,unsigned long base)
{
  char stack[256];
  char *t = stack;
				/* push PID digits on stack */
  do *t++ = (char) (n % base) + '0';
  while (n /= base);
				/* pop digits from stack */
  while (t > stack) *s++ = *--t;
  return s;
}

/* Slurp a command line
 * Accepts: buffer pointer
 *	    buffer size
 *	    input timeout
 */

void slurp (char *s,int n,unsigned long timeout)
{
  memset (s,'\0',n);		/* zap buffer */
  if (state != LOGOUT) {	/* get a command under timeout */
    settimeout (timeout);
    clearerr (stdin);		/* clear stdin errors */
    status = "reading line";
    if (!PSIN (s,n-1)) ioerror (stdin,status);
    settimeout (0);		/* make sure timeout disabled */
    status = NIL;
  }
}


/* Read a literal
 * Accepts: destination buffer (must be size+1 for trailing NUL)
 *	    size of buffer (must be less than 4294967295)
 */

void inliteral (char *s,unsigned long n)
{
  unsigned long i;
  if (litplus.ok) {		/* no more LITERAL+ to worry about */
    litplus.ok = NIL;
    litplus.size = 0;
  }
  else {			/* otherwise tell client ready for argument */
    PSOUT ("+ Ready for argument\015\012");
    PFLUSH ();			/* dump output buffer */
  }
  clearerr (stdin);		/* clear stdin errors */
  memset (s,'\0',n+1);		/* zap buffer */
  status = "reading literal";
  while (n) {			/* get data under timeout */
    if (state == LOGOUT) n = 0;
    else {
      settimeout (INPUTTIMEOUT);
      i = min (n,8192);		/* must read at least 8K within timeout */
      if (PSINR (s,i)) {
	s += i;
	n -= i;
      }
      else {
	ioerror (stdin,status);
	n = 0;			/* in case it continues */
      }
      settimeout (0);		/* stop timeout */
    }
  }
}

/* Flush until newline seen
 * Returns: NIL and sets response, always
 */

unsigned char *flush (void)
{
  int c;
  if (state != LOGOUT) {
    settimeout (INPUTTIMEOUT);
    clearerr (stdin);		/* clear stdin errors */
    status = "flushing line";
    while ((c = PBIN ()) != '\012') if (c == EOF) ioerror (stdin,status);
    settimeout (0);		/* make sure timeout disabled */
  }
  response = "%.80s BAD Command line too long\015\012";
  status = NIL;
  return NIL;
}


/* Report command stream error and die
 * Accepts: stdin or stdout (whichever got the error)
 *	    reason (what caller was doing)
 */

void ioerror (FILE *f,char *reason)
{
  static char msg[MAILTMPLEN];
  char *s,*t;
  if (logout) {			/* say nothing if already dying */
    settimeout (SIGNALTIMER);	/* disable most interrupts */
    server_init (NIL,NIL,NIL,dieint,SIG_IGN,SIG_IGN,SIG_IGN,SIG_IGN);
				/* write error string */
    for (s = ferror (f) ? strerror (errno) : "Unexpected client disconnect",
	   t = logout = msg; *s; *t++ = *s++);
    for (s = ", while "; *s; *t++ = *s++);
    for (s = reason; *s; *t++ = *s++);
    if (critical) {		/* must defer if in critical code */
      state = LOGOUT;		/* die as soon as we can */
    }
    else longjmp (jmpenv,1);	/* die now */
  }
}

/* Parse an IMAP astring
 * Accepts: pointer to argument text pointer
 *	    pointer to returned size
 *	    pointer to returned delimiter
 * Returns: argument
 */

unsigned char *parse_astring (unsigned char **arg,unsigned long *size,
			      unsigned char *del)
{
  unsigned long i;
  unsigned char c,*s,*t,*v;
  if (!*arg) return NIL;	/* better be an argument */
  switch (**arg) {		/* see what the argument is */
  default:			/* atom */
    for (s = t = *arg, i = 0;
	 (*t > ' ') && (*t < 0x7f) && (*t != '(') && (*t != ')') &&
	 (*t != '{') && (*t != '%') && (*t != '*') && (*t != '"') &&
	 (*t != '\\'); ++t,++i);
    if ((*size = i) != 0L) break;	/* got atom if non-empty */
  case ')': case '%': case '*': case '\\': case '\0': case ' ':
   return NIL;			/* empty atom is a bogon */
  case '"':			/* hunt for trailing quote */
    for (s = t = v = *arg + 1; (c = *t++) != '"'; *v++ = c) {
				/* quote next character */
      if (c == '\\') switch (c = *t++) {
      case '"': case '\\': break;
      default: return NIL;	/* invalid quote-next */
      }
				/* else must be a CHAR */
      if (!c || (c & 0x80)) return NIL;
    }
    *v = '\0';			/* tie off string */
    *size = v - s;		/* return size */
    break;

  case '{':			/* literal string */
    s = *arg + 1;		/* get size */
    if (!isdigit (*s)) return NIL;
    if ((*size = i = strtoul (s,(char **) &t,10)) > MAXCLIENTLIT) {
      mm_notify (NIL,"Absurdly long client literal",ERROR);
      syslog (LOG_INFO,"Overlong (%lu) client literal user=%.80s host=%.80s",
	      i,user ? (char *) user : "???",tcp_clienthost ());
      return NIL;
    }
    switch (*t) {		/* validate end of literal */
    case '+':			/* non-blocking literal */
      if (*++t != '}') return NIL;
    case '}':
      if (!t[1]) break;		/* OK if end of line */
    default:
      return NIL;		/* bad literal */
    }
    if (litsp >= LITSTKLEN) {	/* make sure don't overflow stack */
      mm_notify (NIL,"Too many literals in command",ERROR);
      return NIL;
    }
				/* get a literal buffer */
    inliteral (s = litstk[litsp++] = (char *) fs_get (i+1),i);
    				/* get new command tail */
    slurp (*arg = t,CMDLEN - (t - cmdbuf),INPUTTIMEOUT);
				/* if too long, flush and set response */
    if (!strchr (t,'\012')) return flush ();
				/* reset strtok mechanism, tie off if done */
    if (!strtok_r (t,"\015\012",&sstate)) *t = '\0';
				/* possible LITERAL+? */
    if (((i = strlen (t)) > 3) && (t[i - 1] == '}') &&
	(t[i - 2] == '+') && isdigit (t[i - 3])) {
				/* back over possible count */
      for (i -= 4; i && isdigit (t[i]); i--);
      if (t[i] == '{') {	/* found a literal? */
	litplus.ok = T;		/* yes, note LITERAL+ in effect, set size */
	litplus.size = strtoul (t + i + 1,NIL,10);
      }
    }
    break;
  }
  if ((*del = *t) != '\0') {		/* have a delimiter? */
    *t++ = '\0';		/* yes, stomp on it */
    *arg = t;			/* update argument pointer */
  }
  else *arg = NIL;		/* no more arguments */
  return s;
}

/* Parse tag 
 * Accepts: command tag
 * Returns: tag if valid, NIL otherwise
 */

unsigned char *parse_tag (unsigned char *cmd,unsigned char **ret)
{
  unsigned char *s;
  *ret = cmd;			/* make sure this stays defined */
  if (!*cmd) return NIL;	/* empty command line */
				/* find end of tag */
  for (s = cmd; *s && (*s > ' ') && (*s < 0x7f) &&
	 (*s != '(') && (*s != ')') && (*s != '{') &&
	 (*s != '%') && (*s != '*') &&
	 (*s != '"') && (*s != '\\'); ++s);
  if (*s != ' ') return NIL;	/* tag must be delimited by space */
  *s++ = '\0';			/* tie off tag */
  *ret = s;			/* set pointer to remainder of command */
  return cmd;			/* return tag */
}

/* Snarf a command argument (simple jacket into parse_astring())
 * Accepts: pointer to argument text pointer
 * Returns: argument
 */

unsigned char *snarf (unsigned char **arg)
{
  unsigned long i;
  unsigned char c;
  unsigned char *s = parse_astring (arg,&i,&c);
  return ((c == ' ') || !c) ? s : NIL;
}


/* Snarf a BASE64 argument for SASL-IR
 * Accepts: pointer to argument text pointer
 * Returns: argument
 */

unsigned char *snarf_base64 (unsigned char **arg)
{
  unsigned char *ret = *arg;
  unsigned char *s = ret + 1;
  static char base64mask[256] = {
   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
   0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,
   0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,
   0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,
   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
  };
  if (*(ret = *arg) == '=');	/* easy case if zero-length argument */
				/* must be at least one BASE64 char */
  else if (!base64mask[*ret]) return NIL;
  else {			/* quick and dirty */
    while (base64mask[*s]) ++s;	/* scan until end of BASE64 */
    if (*s == '=') ++s;		/* allow up to two padding chars */
    if (*s == '=') ++s;
  }
  switch (*s) {			/* anything following the argument? */
  case ' ':			/* another argument */
    *s++ = '\0';		/* tie off previous argument */
    *arg = s;			/* and update argument pointer */
    break;
  case '\0':			/* end of command */
    *arg = NIL;
    break;
  default:			/* syntax error */
    return NIL;
  }
  return ret;			/* return BASE64 string */
}

/* Snarf a list command argument (simple jacket into parse_astring())
 * Accepts: pointer to argument text pointer
 * Returns: argument
 */

unsigned char *snarf_list (unsigned char **arg)
{
  unsigned long i;
  unsigned char c,*s,*t;
  if (!*arg) return NIL;	/* better be an argument */
  switch (**arg) {
  default:			/* atom and/or wildcard chars */
    for (s = t = *arg, i = 0;
	 (*t > ' ') && (*t != '(') && (*t != ')') && (*t != '{') &&
	 (*t != '"') && (*t != '\\'); ++t,++i);
    if ((c = *t) != '\0') {	/* have a delimiter? */
      *t++ = '\0';		/* stomp on it */
      *arg = t;			/* update argument pointer */
    }
    else *arg = NIL;
    break;
  case ')': case '\\': case '\0': case ' ':
    return NIL;			/* empty name is bogus */
  case '"':			/* quoted string? */
  case '{':			/* or literal? */
    s = parse_astring (arg,&i,&c);
    break;
  }
  return ((c == ' ') || !c) ? s : NIL;
}

/* Get a list of header lines
 * Accepts: pointer to string pointer
 *	    pointer to list flag
 * Returns: string list
 */

STRINGLIST *parse_stringlist (unsigned char **s,int *list)
{
  char *t;
  unsigned long i;
  char c = ' ';
  STRINGLIST *ret = NIL,*cur = NIL;
  if (*s && **s == '(') {	/* proper list? */
    ++*s;			/* for each item in list */
    while ((c == ' ') && (t = parse_astring (s,&i,&c))) {
				/* get new block */
      if (cur) cur = cur->next = mail_newstringlist ();
      else cur = ret = mail_newstringlist ();
				/* note text */
      cur->text.data = (unsigned char *) fs_get (i + 1);
      memcpy (cur->text.data,t,i);
      cur->text.size = i;		/* and size */
    }
				/* must be end of list */
    if (c != ')') mail_free_stringlist (&ret);
  }
  if ((t = *s) != NULL) {	/* need to reload strtok state? */
				/* end of a list? */
    if (*list && (*t == ')') && !t[1]) *list = NIL;
    else sstate = t;		/* otherwise reset strtok state to s */
  }
  return ret;
}

/* Get value of UID * for criteria parsing
 * Accepts: stream
 * Returns: maximum UID
 */

unsigned long uidmax (MAILSTREAM *stream)
{
  return stream->nmsgs ? mail_uid (stream,stream->nmsgs) : 0xffffffff;
}


/* Parse search criteria
 * Accepts: search program to write criteria into
 *	    pointer to argument text pointer
 *	    maximum message number
 *	    maximum UID
 *	    logical nesting depth
 * Returns: T if success, NIL if error
 */

long parse_criteria (SEARCHPGM *pgm,unsigned char **arg,unsigned long maxmsg,
		     unsigned long maxuid,unsigned long depth)
{
  if (arg && *arg) {		/* must be an argument */
				/* parse criteria */
    do if (!parse_criterion (pgm,arg,maxmsg,maxuid,depth)) return NIL;
				/* as long as a space delimiter */
    while (**arg == ' ' && (*arg)++);
				/* failed if not end of criteria */
    if (**arg && **arg != ')') return NIL;
  }
  return T;			/* success */
}

/* Parse a search criterion
 * Accepts: search program to write criterion into
 *	    pointer to argument text pointer
 *	    maximum message number
 *	    maximum UID
 *	    logical nesting depth
 * Returns: T if success, NIL if error
 */

long parse_criterion (SEARCHPGM *pgm,unsigned char **arg,unsigned long maxmsg,
		      unsigned long maxuid,unsigned long depth)
{
  unsigned long i;
  unsigned char c = NIL,*s,*t,*v,*tail,*del;
  SEARCHSET **set;
  SEARCHPGMLIST **not;
  SEARCHOR **or;
  SEARCHHEADER **hdr;
  long ret = NIL;
				/* better be an argument */
  if ((depth > 500) || !(arg && *arg));
  else if (**arg == '(') {	/* list of criteria? */
    (*arg)++;			/* yes, parse the criteria */
    if (parse_criteria (pgm,arg,maxmsg,maxuid,depth+1) && **arg == ')') {
      (*arg)++;			/* skip closing paren */
      ret = T;			/* successful parse of list */
    }
  }
  else {			/* find end of criterion */
    if (!(tail = strpbrk ((s = *arg)," )"))) tail = *arg + strlen (*arg);
    c = *(del = tail);		/* remember the delimiter */
    *del = '\0';		/* tie off criterion */
    switch (*ucase (s)) {	/* dispatch based on character */
    case '*':			/* sequence */
    case '0': case '1': case '2': case '3': case '4':
    case '5': case '6': case '7': case '8': case '9':
      if (*(set = &pgm->msgno)){/* already a sequence? */
				/* silly, but not as silly as the client! */
	for (not = &pgm->not; *not; not = &(*not)->next);
	*not = mail_newsearchpgmlist ();
	set = &((*not)->pgm->not = mail_newsearchpgmlist ())->pgm->msgno;
      }
      ret = crit_set (set,&s,maxmsg) && (tail == s);
      break;
    case 'A':			/* possible ALL, ANSWERED */
      if (!strcmp (s+1,"LL")) ret = T;
      else if (!strcmp (s+1,"NSWERED")) ret = pgm->answered = T;
      break;

    case 'B':			/* possible BCC, BEFORE, BODY */
      if (!strcmp (s+1,"CC") && c == ' ' && *++tail)
	ret = crit_string (&pgm->bcc,&tail);
      else if (!strcmp (s+1,"EFORE") && c == ' ' && *++tail)
	ret = crit_date (&pgm->before,&tail);
      else if (!strcmp (s+1,"ODY") && c == ' ' && *++tail)
	ret = crit_string (&pgm->body,&tail);
      break;
    case 'C':			/* possible CC */
      if (!strcmp (s+1,"C") && c == ' ' && *++tail)
	ret = crit_string (&pgm->cc,&tail);
      break;
    case 'D':			/* possible DELETED */
      if (!strcmp (s+1,"ELETED")) ret = pgm->deleted = T;
      if (!strcmp (s+1,"RAFT")) ret = pgm->draft = T;
      break;
    case 'F':			/* possible FLAGGED, FROM */
      if (!strcmp (s+1,"LAGGED")) ret = pgm->flagged = T;
      else if (!strcmp (s+1,"ROM") && c == ' ' && *++tail)
	ret = crit_string (&pgm->from,&tail);
      break;
    case 'H':			/* possible HEADER */
      if (!strcmp (s+1,"EADER") && c == ' ' && *(v = tail + 1) &&
	  (s = parse_astring (&v,&i,&c)) && i && c == ' ' &&
	  (t = parse_astring (&v,&i,&c))) {
	for (hdr = &pgm->header; *hdr; hdr = &(*hdr)->next);
	*hdr = mail_newsearchheader (s,t);
				/* update tail, restore delimiter */
	*(tail = v ? v - 1 : t + i) = c;
	ret = T;		/* success */
      }
      break;
    case 'K':			/* possible KEYWORD */
      if (!strcmp (s+1,"EYWORD") && c == ' ' && *++tail)
	ret = crit_string (&pgm->keyword,&tail);
      break;
    case 'L':
      if (!strcmp (s+1,"ARGER") && c == ' ' && *++tail)
	ret = crit_number (&pgm->larger,&tail);
      break;
    case 'N':			/* possible NEW, NOT */
      if (!strcmp (s+1,"EW")) ret = pgm->recent = pgm->unseen = T;
      else if (!strcmp (s+1,"OT") && c == ' ' && *++tail) {
	for (not = &pgm->not; *not; not = &(*not)->next);
	*not = mail_newsearchpgmlist ();
	ret = parse_criterion ((*not)->pgm,&tail,maxmsg,maxuid,depth+1);
      }
      break;

    case 'O':			/* possible OLD, ON */
      if (!strcmp (s+1,"LD")) ret = pgm->old = T;
      else if (!strcmp (s+1,"N") && c == ' ' && *++tail)
	ret = crit_date (&pgm->on,&tail);
      else if (!strcmp (s+1,"R") && c == ' ') {
	for (or = &pgm->or; *or; or = &(*or)->next);
	*or = mail_newsearchor ();
	ret = *++tail && parse_criterion((*or)->first,&tail,maxmsg,maxuid,
					 depth+1) &&
	  (*tail == ' ') && *++tail &&
	  parse_criterion ((*or)->second,&tail,maxmsg,maxuid,depth+1);
      }
      else if (!strcmp (s+1,"LDER") && c == ' ' && *++tail)
	ret = crit_number (&pgm->older,&tail);
      break;
    case 'R':			/* possible RECENT */
      if (!strcmp (s+1,"ECENT")) ret = pgm->recent = T;
      break;
    case 'S':			/* possible SEEN, SINCE, SUBJECT */
      if (!strcmp (s+1,"EEN")) ret = pgm->seen = T;
      else if (!strcmp (s+1,"ENTBEFORE") && c == ' ' && *++tail)
	ret = crit_date (&pgm->sentbefore,&tail);
      else if (!strcmp (s+1,"ENTON") && c == ' ' && *++tail)
	ret = crit_date (&pgm->senton,&tail);
      else if (!strcmp (s+1,"ENTSINCE") && c == ' ' && *++tail)
	ret = crit_date (&pgm->sentsince,&tail);
      else if (!strcmp (s+1,"INCE") && c == ' ' && *++tail)
	ret = crit_date (&pgm->since,&tail);
      else if (!strcmp (s+1,"MALLER") && c == ' ' && *++tail)
	ret = crit_number (&pgm->smaller,&tail);
      else if (!strcmp (s+1,"UBJECT") && c == ' ' && *++tail)
	ret = crit_string (&pgm->subject,&tail);
      break;
    case 'T':			/* possible TEXT, TO */
      if (!strcmp (s+1,"EXT") && c == ' ' && *++tail)
	ret = crit_string (&pgm->text,&tail);
      else if (!strcmp (s+1,"O") && c == ' ' && *++tail)
	ret = crit_string (&pgm->to,&tail);
      break;

    case 'U':			/* possible UID, UN* */
      if (!strcmp (s+1,"ID") && c== ' ' && *++tail) {
	if (*(set = &pgm->uid)){/* already a sequence? */
				/* silly, but not as silly as the client! */
	  for (not = &pgm->not; *not; not = &(*not)->next);
	  *not = mail_newsearchpgmlist ();
	  set = &((*not)->pgm->not = mail_newsearchpgmlist ())->pgm->uid;
	}
	ret = crit_set (set,&tail,maxuid);
      }
      else if (!strcmp (s+1,"NANSWERED")) ret = pgm->unanswered = T;
      else if (!strcmp (s+1,"NDELETED")) ret = pgm->undeleted = T;
      else if (!strcmp (s+1,"NDRAFT")) ret = pgm->undraft = T;
      else if (!strcmp (s+1,"NFLAGGED")) ret = pgm->unflagged = T;
      else if (!strcmp (s+1,"NKEYWORD") && c == ' ' && *++tail)
	ret = crit_string (&pgm->unkeyword,&tail);
      else if (!strcmp (s+1,"NSEEN")) ret = pgm->unseen = T;
      break;
    case 'Y':			/* possible YOUNGER */
      if (!strcmp (s+1,"OUNGER") && c == ' ' && *++tail)
	ret = crit_number (&pgm->younger,&tail);
      break;
    default:			/* oh dear */
      break;
    }
    if (ret) {			/* only bother if success */
      *del = c;			/* restore delimiter */
      *arg = tail;		/* update argument pointer */
    }
  }
  return ret;			/* return more to come */
}

/* Parse a search date criterion
 * Accepts: date to write into
 *	    pointer to argument text pointer
 * Returns: T if success, NIL if error
 */

long crit_date (unsigned short *date,unsigned char **arg)
{
  if (*date) return NIL;	/* can't double this value */
				/* handle quoted form */
  if (**arg != '"') return crit_date_work (date,arg);
  (*arg)++;			/* skip past opening quote */
  if (!(crit_date_work (date,arg) && (**arg == '"'))) return NIL;
  (*arg)++;			/* skip closing quote */
  return T;
}

/* Worker routine to parse a search date criterion
 * Accepts: date to write into
 *	    pointer to argument text pointer
 * Returns: T if success, NIL if error
 */

long crit_date_work (unsigned short *date,unsigned char **arg)
{
  int d,m,y;
				/* day */
  if (isdigit (d = *(*arg)++) || ((d == ' ') && isdigit (**arg))) {
    if (d == ' ') d = 0;	/* leading space */
    else d -= '0';		/* first digit */
    if (isdigit (**arg)) {	/* if a second digit */
      d *= 10;			/* slide over first digit */
      d += *(*arg)++ - '0';	/* second digit */
    }
    if ((**arg == '-') && (y = *++(*arg))) {
      m = (y >= 'a' ? y - 'a' : y - 'A') * 1024;
      if ((y = *++(*arg))) {
	m += (y >= 'a' ? y - 'a' : y - 'A') * 32;
	if ((y = *++(*arg))) {
	  m += (y >= 'a' ? y - 'a' : y - 'A');
	  switch (m) {		/* determine the month */
	  case (('J'-'A') * 1024) + (('A'-'A') * 32) + ('N'-'A'): m = 1; break;
	  case (('F'-'A') * 1024) + (('E'-'A') * 32) + ('B'-'A'): m = 2; break;
	  case (('M'-'A') * 1024) + (('A'-'A') * 32) + ('R'-'A'): m = 3; break;
	  case (('A'-'A') * 1024) + (('P'-'A') * 32) + ('R'-'A'): m = 4; break;
	  case (('M'-'A') * 1024) + (('A'-'A') * 32) + ('Y'-'A'): m = 5; break;
	  case (('J'-'A') * 1024) + (('U'-'A') * 32) + ('N'-'A'): m = 6; break;
	  case (('J'-'A') * 1024) + (('U'-'A') * 32) + ('L'-'A'): m = 7; break;
	  case (('A'-'A') * 1024) + (('U'-'A') * 32) + ('G'-'A'): m = 8; break;
	  case (('S'-'A') * 1024) + (('E'-'A') * 32) + ('P'-'A'): m = 9; break;
	  case (('O'-'A') * 1024) + (('C'-'A') * 32) + ('T'-'A'): m = 10;break;
	  case (('N'-'A') * 1024) + (('O'-'A') * 32) + ('V'-'A'): m = 11;break;
	  case (('D'-'A') * 1024) + (('E'-'A') * 32) + ('C'-'A'): m = 12;break;
	  default: return NIL;
	  }
	  if ((*++(*arg) == '-') && isdigit (*++(*arg))) {
	    y = 0;		/* init year */
	    do {
	      y *= 10;		/* add this number */
	      y += *(*arg)++ - '0';
	    }
	    while (isdigit (**arg));
				/* minimal validity check of date */
	    if (d < 1 || d > 31 || m < 1 || m > 12 || y < 0) return NIL; 
				/* time began on UNIX in 1970 */
	    if (y < 100) y += (y >= (BASEYEAR - 1900)) ? 1900 : 2000;
				/* return value */
	    *date = mail_shortdate (y - BASEYEAR,m,d);
	    return T;		/* success */
	  }
	}
      }
    }
  }
  return NIL;			/* else error */
}

/* Parse a search set criterion
 * Accepts: set to write into
 *	    pointer to argument text pointer
 *	    maximum value permitted
 * Returns: T if success, NIL if error
 */

long crit_set (SEARCHSET **set,unsigned char **arg,unsigned long maxima)
{
  unsigned long i = 0;
  if (*set) return NIL;		/* can't double this value */
  *set = mail_newsearchset ();	/* instantiate a new search set */
  if (**arg == '*') {		/* maxnum? */
    (*arg)++;			/* skip past that number */
    (*set)->first = maxima;
  }
  else if (crit_number (&i,arg) && i) (*set)->first = i;
  else return NIL;		/* bogon */
  switch (**arg) {		/* decide based on delimiter */
  case ':':			/* sequence range */
    i = 0;			/* reset for crit_number() */
    if (*++(*arg) == '*') {	/* maxnum? */
      (*arg)++;			/* skip past that number */
      (*set)->last = maxima;
    }
    else if (crit_number (&i,arg) && i) {
      if (i < (*set)->first) {	/* backwards range */
	(*set)->last = (*set)->first;
	(*set)->first = i;
      }
      else (*set)->last = i;	/* set last number */
    }
    else return NIL;		/* bogon */
    if (**arg != ',') break;	/* drop into comma case if comma seen */
  case ',':
    (*arg)++;			/* skip past delimiter */
    return crit_set (&(*set)->next,arg,maxima);
  default:
    break;
  }
  return T;			/* return success */
}

/* Parse a search number criterion
 * Accepts: number to write into
 *	    pointer to argument text pointer
 * Returns: T if success, NIL if error
 */

long crit_number (unsigned long *number,unsigned char **arg)
{
				/* can't double this value */
  if (*number || !isdigit (**arg)) return NIL;
  *number = 0;
  while (isdigit (**arg)) {	/* found a digit? */
    *number *= 10;		/* add a decade */
    *number += *(*arg)++ - '0';	/* add number */
  }
  return T;
}


/* Parse a search string criterion
 * Accepts: date to write into
 *	    pointer to argument text pointer
 * Returns: T if success, NIL if error
 */

long crit_string (STRINGLIST **string,unsigned char **arg)
{
  unsigned long i;
  char c;
  char *s = parse_astring (arg,&i,&c);
  if (!s) return NIL;
				/* find tail of list */
  while (*string) string = &(*string)->next;
  *string = mail_newstringlist ();
  (*string)->text.data = (unsigned char *) fs_get (i + 1);
  memcpy ((*string)->text.data,s,i);
  (*string)->text.data[i] = '\0';
  (*string)->text.size = i;
				/* if end of arguments, wrap it up here */
  if (!*arg) *arg = (char *) (*string)->text.data + i;
  else (*--(*arg) = c);		/* back up pointer, restore delimiter */
  return T;
}

/* Fetch message data
 * Accepts: string of data items to be fetched (must be writeable)
 *	    UID fetch flag
 */

#define MAXFETCH 100

void fetch (char *t,unsigned long uid)
{
  fetchfn_t f[MAXFETCH +2];
  void *fa[MAXFETCH + 2];
  int k;
  memset ((void *) f,NIL,sizeof (f));
  memset ((void *) fa,NIL,sizeof (fa));
  fetch_work (t,uid,f,fa);	/* do the work */
				/* clean up arguments */
  for (k = 1; f[k]; k++) if (fa[k]) (*f[k]) (0,fa[k]);
}


/* Fetch message data worker routine
 * Accepts: string of data items to be fetched (must be writeable)
 *	    UID fetch flag
 *	    function dispatch vector
 *	    function argument vector
 */

void fetch_work (char *t,unsigned long uid,fetchfn_t f[],void *fa[])
{
  unsigned char *s,*v;
  unsigned long i;
  unsigned long k = 0;
  BODY *b;
  int list = NIL;
  int parse_envs = NIL;
  int parse_bodies = NIL;
  if (uid) {			/* need to fetch UIDs? */
    fa[k] = NIL;		/* no argument */
    f[k++] = fetch_uid;		/* push a UID fetch on the stack */
  }

				/* process macros */
  if (!strcmp (ucase (t),"ALL"))
    strcpy (t,"(FLAGS INTERNALDATE RFC822.SIZE ENVELOPE)");
  else if (!strcmp (t,"FULL"))
    strcpy (t,"(FLAGS INTERNALDATE RFC822.SIZE ENVELOPE BODY)");
  else if (!strcmp (t,"FAST")) strcpy (t,"(FLAGS INTERNALDATE RFC822.SIZE)");
  if ((list = (*t == '(')) != 0) t++;	/* skip open paren */
				/* parse attribute list */
  if ((s = strtok_r (t," ",&sstate)) != NULL) do {
    if (list && (i = strlen (s)) && (s[i-1] == ')')) {
      list = NIL;		/* done with list */
      s[i-1] = '\0';		/* tie off last item */
    }
    fa[k] = NIL;		/* default to no argument */
    if (!strcmp (s,"UID")) {	/* no-op if implicit */
      if (!uid) f[k++] = fetch_uid;
    }
    else if (!strcmp (s,"FLAGS")) f[k++] = fetch_flags;
    else if (!strcmp (s,"INTERNALDATE")) f[k++] = fetch_internaldate;
    else if (!strcmp (s,"RFC822.SIZE")) f[k++] = fetch_rfc822_size;
    else if (!strcmp (s,"ENVELOPE")) {
      parse_envs = T;		/* we will need to parse envelopes */
      f[k++] = fetch_envelope;
    }
    else if (!strcmp (s,"BODY")) {
      parse_envs = parse_bodies = T;
      f[k++] = fetch_body;
    }
    else if (!strcmp (s,"BODYSTRUCTURE")) {
      parse_envs = parse_bodies = T;
      f[k++] = fetch_bodystructure;
    }
    else if (!strcmp (s,"RFC822")) {
      fa[k] = s[6] ? (void *) FT_PEEK : NIL;
      f[k++] = fetch_rfc822;
    }
    else if (!strcmp (s,"RFC822.HEADER")) f[k++] = fetch_rfc822_header;
    else if (!strcmp (s,"RFC822.TEXT")) {
      fa[k] = s[11] ? (void *) FT_PEEK : NIL;
      f[k++] = fetch_rfc822_text;
    }

    else if (!strncmp (s,"BODY[",5) || !strncmp (s,"BODY.PEEK[",10) ||
	     !strncmp (s,"BINARY[",7) || !strncmp (s,"BINARY.PEEK[",12) ||
	     !strncmp (s,"BINARY.SIZE[",12)) {
      TEXTARGS *ta = (TEXTARGS *)
	memset (fs_get (sizeof (TEXTARGS)),0,sizeof (TEXTARGS));
      if (s[1] == 'I') {	/* body or binary? */
	ta->binary = FTB_BINARY;/* binary */
	f[k] = fetch_body_part_binary;
	if (s[6] == '.') {	/* wanted peek or size? */
	  if (s[7] == 'P') ta->flags = FT_PEEK;
	  else ta->binary |= FTB_SIZE;
	  s += 12;		/* skip to section specifier */
	}
	else s += 7;		/* skip to section specifier */
	if (!isdigit (*s)) {	/* make sure top-level digit */
	  fs_give ((void **) &ta);
	  response = badbin;
	  return;
	}
      }
      else {			/* body */
	f[k] = fetch_body_part_contents;
	if (s[4] == '.') {	/* wanted peek? */
	  ta->flags = FT_PEEK;
	  s += 10;		/* skip to section specifier */
	}
	else s += 5;		/* skip to section specifier */
      }
      if (*(v = s) != ']') {	/* non-empty section specifier? */
	if (isdigit (*v)) {	/* have section specifier? */
				/* need envelopes and bodies */
	  parse_envs = parse_bodies = T;
	  while (isdigit (*v))	/* scan to end of section specifier */
	    if ((*++v == '.') && isdigit (v[1])) v++;
				/* any IMAP4rev1 stuff following? */
	  if ((*v == '.') && isalpha (v[1])) {
	    if (ta->binary) {	/* not if binary you don't */
	      fs_give ((void **) &ta);
	      response = badbin;
	      return;
	    }
	    *v++ = '\0';	/* yes, tie off section specifier */
	    if (!strncmp (v,"MIME",4)) {
	      v += 4;		/* found <section>.MIME */
	      f[k] = fetch_body_part_mime;
	    }
	  }
	  else if (*v != ']') {	/* better be the end if no IMAP4rev1 stuff */
	    fs_give ((void **) &ta);/* clean up */
	    response = "%.80s BAD Syntax error in section specifier\015\012";
	    return;
	  }
	}

	if (*v != ']') {	/* IMAP4rev1 stuff here? */
	  if (!strncmp (v,"HEADER",6)) {
	    *v = '\0';		/* tie off in case top level */
	    v += 6;		/* found [<section>.]HEADER */
	    f[k] = fetch_body_part_header;
				/* partial headers wanted? */
	    if (!strncmp (v,".FIELDS",7)) {
	      v += 7;		/* yes */
	      if (!strncmp (v,".NOT",4)) {
		v += 4;		/* want to exclude named headers */
		ta->flags |= FT_NOT;
	      }
	      if (*v || !(v = strtok_r (NIL,"\015\012",&sstate)) ||
		  !(ta->lines = parse_stringlist (&v,&list))) {
		fs_give ((void **) &ta);/* clean up */
		response = "%.80s BAD Syntax error in header fields\015\012";
		return;
	      }
	      ucase (v);	/* make sure followup is ucase */
	    }
	  }
	  else if (!strncmp (v,"TEXT",4)) {
	    *v = '\0';		/* tie off in case top level */
	    v += 4;		/* found [<section>.]TEXT */
	    f[k] = fetch_body_part_text;
	  }
	  else {
	    fs_give ((void **) &ta);/* clean up */
	    response = "%.80s BAD Unknown section text specifier\015\012";
	    return;
	  }
	}
      }
				/* tie off section */
      if (*v == ']') *v++ = '\0';
      else {			/* bogon */
	if (ta->lines) mail_free_stringlist (&ta->lines);
	fs_give ((void **) &ta);/* clean up */
	response = "%.80s BAD Section specifier not terminated\015\012";
	return;
      }

      if ((*v == '<') &&	/* partial specifier? */
	  ((ta->binary & FTB_SIZE) ||
	   !(isdigit (v[1]) && ((ta->first = strtoul (v+1,(char **) &v,10)) ||
				v) &&
	     (*v++ == '.') && (ta->last = strtoul (v,(char **) &v,10)) &&
	     (*v++ == '>')))) {
	if (ta->lines) mail_free_stringlist (&ta->lines);
	fs_give ((void **) &ta);
	response ="%.80s BAD Syntax error in partial text specifier\015\012";
	return;
      }
      switch (*v) {		/* what's there now? */
      case ' ':			/* more follows */
	sstate = v + 1;		/* reset strtok mechanism */
	break;
      case '\0':		/* none */
	break;
      case ')':			/* end of list */
	if (list && !v[1]) {	/* make sure of that */
	  list = NIL;
				/* reset strtok mechanism */
	  strtok_r (v," ",&sstate);
	  break;		/* all done */
	}
				/* otherwise it's a bogon, drop in */
      default:			/* bogon */
	if (ta->lines) mail_free_stringlist (&ta->lines);
	fs_give ((void **) &ta);
	response = "%.80s BAD Syntax error after section specifier\015\012";
	return;
      }
				/* make copy of section specifier */
      if (s && *s) ta->section = cpystr (s);
      fa[k++] = (void *) ta;	/* set argument */
    }
    else {			/* unknown attribute */
      response = badatt;
      return;
    }
  } while ((s = strtok_r (NIL," ",&sstate)) && (k < MAXFETCH) && list);
  else {
    response = misarg;		/* missing attribute list */
    return;
  }

  if (s) {			/* too many attributes? */
    response = "%.80s BAD Excessively complex FETCH attribute list\015\012";
    return;
  }
  if (list) {			/* too many attributes? */
    response = "%.80s BAD Unterminated FETCH attribute list\015\012";
    return;
  }
  f[k] = NIL;			/* tie off attribute list */
				/* c-client clobbers sequence, use spare */
  for (i = 1; i <= nmsgs; i++)
    mail_elt (stream,i)->spare = mail_elt (stream,i)->sequence;
				/* for each requested message */
  for (i = 1; (i <= nmsgs) && (response != loseunknowncte); i++) {
				/* kill if dying */
    if (state == LOGOUT) longjmp (jmpenv,1);
    if (mail_elt (stream,i)->spare) {
				/* parse envelope, set body, do warnings */
      if (parse_envs) mail_fetchstructure (stream,i,parse_bodies ? &b : NIL);
      quell_events = T;		/* can't do any events now */
      PSOUT ("* ");		/* leader */
      pnum (i);
      PSOUT (" FETCH (");
      (*f[0]) (i,fa[0]);	/* do first attribute */
				/* for each subsequent attribute */
      for (k = 1; f[k] && (response != loseunknowncte); k++) {
	PBOUT (' ');		/* delimit with space */
	(*f[k]) (i,fa[k]);	/* do that attribute */
      }
      PSOUT (")\015\012");	/* trailer */
      quell_events = NIL;	/* events alright now */
    }
  }
}

/* Fetch message body structure (extensible)
 * Accepts: message number
 *	    extra argument
 */

void fetch_bodystructure (unsigned long i,void *args)
{
  BODY *body;
  mail_fetchstructure (stream,i,&body);
  PSOUT ("BODYSTRUCTURE ");
  pbodystructure (body);	/* output body */
}


/* Fetch message body structure (non-extensible)
 * Accepts: message number
 *	    extra argument
 */


void fetch_body (unsigned long i,void *args)
{
  BODY *body;
  mail_fetchstructure (stream,i,&body);
  PSOUT ("BODY ");		/* output attribute */
  pbody (body);			/* output body */
}

/* Fetch body part MIME header
 * Accepts: message number
 *	    extra argument
 */

void fetch_body_part_mime (unsigned long i,void *args)
{
  TEXTARGS *ta = (TEXTARGS *) args;
  if (i) {			/* do work? */
    SIZEDTEXT st;
    unsigned long uid = mail_uid (stream,i);
    char *tmp = (char *) fs_get (100 + strlen (ta->section));
    sprintf (tmp,"BODY[%s.MIME]",ta->section);
				/* try to use remembered text */
    if (lastuid && (uid == lastuid) && !strcmp (tmp,lastid)) st = lastst;
    else {			/* get data */
      st.data = (unsigned char *)
	mail_fetch_mime (stream,i,ta->section,&st.size,ta->flags);
      if (ta->first || ta->last) remember (uid,tmp,&st);
    }
    pbodypartstring (i,tmp,&st,NIL,ta);
    fs_give ((void **) &tmp);
  }
  else {			/* clean up the arguments */
    fs_give ((void **) &ta->section);
    fs_give ((void **) &args);
  }
}


/* Fetch body part contents
 * Accepts: message number
 *	    extra argument
 */

void fetch_body_part_contents (unsigned long i,void *args)
{
  TEXTARGS *ta = (TEXTARGS *) args;
  if (i) {			/* do work? */
    SIZEDTEXT st;
    char *tmp = (char *) fs_get (100+(ta->section ? strlen (ta->section) : 0));
    unsigned long uid = mail_uid (stream,i);
    sprintf (tmp,"BODY[%s]",ta->section ? ta->section : "");
				/* try to use remembered text */
    if (lastuid && (uid == lastuid) && !strcmp (tmp,lastid)) st = lastst;
				/* get data */
    else if ((st.data = (unsigned char *)
	      mail_fetch_body (stream,i,ta->section,&st.size,
			       ta->flags | FT_RETURNSTRINGSTRUCT)) &&
	     (ta->first || ta->last)) remember (uid,tmp,&st);
    pbodypartstring (i,tmp,&st,&stream->private.string,ta);
    fs_give ((void **) &tmp);
  }
  else {			/* clean up the arguments */
    if (ta->section) fs_give ((void **) &ta->section);
    fs_give ((void **) &args);
  }
}

/* Fetch body part binary
 * Accepts: message number
 *	    extra argument
 * Someday fix this to use stringstruct instead of memory
 */

void fetch_body_part_binary (unsigned long i,void *args)
{
  TEXTARGS *ta = (TEXTARGS *) args;
  if (i) {			/* do work? */
    SIZEDTEXT st,cst;
    BODY *body = mail_body (stream,i,ta->section);
    char *tmp = (char *) fs_get (100+(ta->section ? strlen (ta->section) : 0));
    unsigned long uid = mail_uid (stream,i);
				/* try to use remembered text */
    if (lastuid && (uid == lastuid) && !strcmp (tmp,lastid)) st = lastst;
    else {			/* get data */
      st.data = (unsigned char *)
	mail_fetch_body (stream,i,ta->section,&st.size,ta->flags);
      if (ta->first || ta->last) remember (uid,tmp,&st);
    }
				/* what encoding was used? */
    if (body) switch (body->encoding) {
    case ENCBASE64:
      if ((cst.data = rfc822_base64 (st.data,st.size,&cst.size)) != NULL) break;
      fetch_uid (i,NIL);	/* wrote a space, so must do something */
      if (lsterr) fs_give ((void **) &lsterr);
      lsterr = cpystr ("Undecodable BASE64 contents");
      response = loseunknowncte;
      fs_give ((void **) &tmp);
      return;
    case ENCQUOTEDPRINTABLE:
      if ((cst.data = rfc822_qprint (st.data,st.size,&cst.size)) != NULL) break;
      fetch_uid (i,NIL);	/* wrote a space, so must do something */
      if (lsterr) fs_give ((void **) &lsterr);
      lsterr = cpystr ("Undecodable QUOTED-PRINTABLE contents");
      response = loseunknowncte;
      fs_give ((void **) &tmp);
      return;
    case ENC7BIT:		/* no need to convert any of these */
    case ENC8BIT:
    case ENCBINARY:
      cst.data = NIL;		/* no converted data to free */
      break;
    default:			/* unknown encoding, oops */
      fetch_uid (i,NIL);	/* wrote a space, so must do something */
      if (lsterr) fs_give ((void **) &lsterr);
      lsterr = cpystr ("Unknown Content-Transfer-Encoding");
      response = loseunknowncte;
      fs_give ((void **) &tmp);
      return;
    }
    else {
      if (lsterr) fs_give ((void **) &lsterr);
      lsterr = cpystr ("Invalid body part");
      response = loseunknowncte;
      fs_give ((void **) &tmp);
      return;
    }

				/* use decoded version if exists */
    if (cst.data) memcpy ((void *) &st,(void *) &cst,sizeof (SIZEDTEXT));
    if (ta->binary & FTB_SIZE) {/* just want size? */
      sprintf (tmp,"BINARY.SIZE[%s] %lu",ta->section ? ta->section : "",
	       st.size);
      PSOUT (tmp);
    }
    else {			/* no, blat binary data */
      int f = mail_elt (stream,i)->seen;
      if (st.data) {		/* only if have useful data */
				/* partial specifier */
	if (ta->first || ta->last)
	  sprintf (tmp,"BINARY[%s]<%lu> ",
		   ta->section ? ta->section : "",ta->first);
	else sprintf (tmp,"BINARY[%s] ",ta->section ? ta->section : "");
  				/* in case first byte beyond end of text */
	if (st.size <= ta->first) st.size = ta->first = 0;
	else {			/* offset and truncate */
	  st.data += ta->first;	/* move to desired position */
	  st.size -= ta->first;	/* reduced size */
	  if (ta->last && (st.size > ta->last)) st.size = ta->last;
	}
	if (st.size) sprintf (tmp + strlen (tmp),"{%lu}\015\012",st.size);
	else strcat (tmp,"\"\"");
	PSOUT (tmp);		/* write binary output */
	if (st.size && (PSOUTR (&st) == EOF)) ioerror(stdout,"writing binary");
      }
      else {
	sprintf (tmp,"BINARY[%s] NIL",ta->section ? ta->section : "");
	PSOUT (tmp);
      }
      changed_flags (i,f);	/* write changed flags */
    }
				/* free converted data */
    if (cst.data) fs_give ((void **) &cst.data);
    fs_give ((void **) &tmp);	/* and temporary string */
  }
  else {			/* clean up the arguments */
    if (ta->section) fs_give ((void **) &ta->section);
    fs_give ((void **) &args);
  }
}

/* Fetch MESSAGE/RFC822 body part header
 * Accepts: message number
 *	    extra argument
 */

void fetch_body_part_header (unsigned long i,void *args)
{
  TEXTARGS *ta = (TEXTARGS *) args;
  unsigned long len = 100 + (ta->section ? strlen (ta->section) : 0);
  STRINGLIST *s;
  for (s = ta->lines; s; s = s->next) len += s->text.size + 1;
  if (i) {			/* do work? */
    SIZEDTEXT st;
    char *tmp = (char *) fs_get (len);
    PSOUT ("BODY[");
				/* output attribute */
    if (ta->section && *ta->section) {
      PSOUT (ta->section);
      PBOUT ('.');
    }
    PSOUT ("HEADER");
    if (ta->lines) {
      PSOUT ((ta->flags & FT_NOT) ? ".FIELDS.NOT " : ".FIELDS ");
      pastringlist (ta->lines);
    }
    strcpy (tmp,"]");		/* close section specifier */
    st.data = (unsigned char *)	/* get data (no hope in using remember here) */
      mail_fetch_header (stream,i,ta->section,ta->lines,&st.size,ta->flags);
    pbodypartstring (i,tmp,&st,NIL,ta);
    fs_give ((void **) &tmp);
  }
  else {			/* clean up the arguments */
    if (ta->lines) mail_free_stringlist (&ta->lines);
    if (ta->section) fs_give ((void **) &ta->section);
    fs_give ((void **) &args);
  }
}

/* Fetch MESSAGE/RFC822 body part text
 * Accepts: message number
 *	    extra argument
 */

void fetch_body_part_text (unsigned long i,void *args)
{
  TEXTARGS *ta = (TEXTARGS *) args;
  if (i) {			/* do work? */
    SIZEDTEXT st;
    char *tmp = (char *) fs_get (100+(ta->section ? strlen (ta->section) : 0));
    unsigned long uid = mail_uid (stream,i);
				/* output attribute */
    if (ta->section && *ta->section) sprintf (tmp,"BODY[%s.TEXT]",ta->section);
    else strcpy (tmp,"BODY[TEXT]");
				/* try to use remembered text */
    if (lastuid && (uid == lastuid) && !strcmp (tmp,lastid)) st = lastst;
				/* get data */
    else if ((st.data = (unsigned char *)
	      mail_fetch_text (stream,i,ta->section,&st.size,
			       ta->flags | FT_RETURNSTRINGSTRUCT)) &&
	     (ta->first || ta->last)) remember (uid,tmp,&st);
    pbodypartstring (i,tmp,&st,&stream->private.string,ta);
    fs_give ((void **) &tmp);
  }
  else {			/* clean up the arguments */
    if (ta->section) fs_give ((void **) &ta->section);
    fs_give ((void **) &args);
  }
}


/* Remember body part text for subsequent partial fetching
 * Accepts: message UID
 *	    body part id
 *	    text
 *	    string
 */

void remember (unsigned long uid,char *id,SIZEDTEXT *st)
{
  lastuid = uid;		/* remember UID */
  if (lastid) fs_give ((void **) &lastid);
  lastid = cpystr (id);		/* remember body part id */
  if (lastst.data) fs_give ((void **) &lastst.data);
				/* remember text */
  lastst.data = (unsigned char *)
    memcpy (fs_get (st->size + 1),st->data,st->size);
  lastst.size = st->size;
}


/* Fetch envelope
 * Accepts: message number
 *	    extra argument
 */

void fetch_envelope (unsigned long i,void *args)
{
  ENVELOPE *env = mail_fetchenvelope (stream,i);
  PSOUT ("ENVELOPE ");		/* output attribute */
  penv (env);			/* output envelope */
}

/* Fetch flags
 * Accepts: message number
 *	    extra argument
 */

void fetch_flags (unsigned long i,void *args)
{
  unsigned long u;
  char *t,tmp[MAILTMPLEN];
  int c = NIL;
  MESSAGECACHE *elt = mail_elt (stream,i);
  if (!elt->valid) {		/* have valid flags yet? */
    sprintf (tmp,"%lu",i);
    mail_fetch_flags (stream,tmp,NIL);
  }
  PSOUT ("FLAGS (");		/* output attribute */
				/* output system flags */
  if (elt->recent) put_flag (&c,"\\Recent");
  if (elt->seen) put_flag (&c,"\\Seen");
  if (elt->deleted) put_flag (&c,"\\Deleted");
  if (elt->flagged) put_flag (&c,"\\Flagged");
  if (elt->answered) put_flag (&c,"\\Answered");
  if (elt->draft) put_flag (&c,"\\Draft");
  if ((u = elt->user_flags) != 0L) do	/* any user flags? */
    if ((t = stream->user_flags[find_rightmost_bit (&u)]) != NULL) put_flag (&c,t);
  while (u);			/* until no more user flags */
  PBOUT (')');			/* end of flags */
  elt->spare2 = NIL;		/* we've sent the update */
}


/* Output a flag
 * Accepts: pointer to current delimiter character
 *	    flag to output
 * Changes delimiter character to space
 */

void put_flag (int *c,char *s)
{
  if (*c) PBOUT (*c);		/* put delimiter */
  PSOUT (s);			/* dump flag */
  *c = ' ';			/* change delimiter if necessary */
}


/* Output flags if was unseen
 * Accepts: message number
 *	    prior value of Seen flag
 */

void changed_flags (unsigned long i,int f)
{
				/* was unseen, now seen? */
  if (!f && mail_elt (stream,i)->seen) {
    PBOUT (' ');		/* yes, delimit with space */
    fetch_flags (i,NIL);	/* output flags */
  }
}

/* Fetch message internal date
 * Accepts: message number
 *	    extra argument
 */

void fetch_internaldate (unsigned long i,void *args)
{
  char tmp[MAILTMPLEN];
  MESSAGECACHE *elt = mail_elt (stream,i);
  if (!elt->day) {		/* have internal date yet? */
    sprintf (tmp,"%lu",i);
    mail_fetch_fast (stream,tmp,NIL);
  }
  PSOUT ("INTERNALDATE \"");
  PSOUT (mail_date (tmp,elt));
  PBOUT ('"');
}


/* Fetch unique identifier
 * Accepts: message number
 *	    extra argument
 */

void fetch_uid (unsigned long i,void *args)
{
  PSOUT ("UID ");
  pnum (mail_uid (stream,i));
}

/* Fetch complete RFC-822 format message
 * Accepts: message number
 *	    extra argument
 */

void fetch_rfc822 (unsigned long i,void *args)
{
  if (i) {			/* do work? */
    int f = mail_elt (stream,i)->seen;
#if 0
    SIZEDTEXT st;
    st.data = (unsigned char *)
      mail_fetch_message (stream,i,&st.size,(long) args);
    pbodypartstring (i,"RFC822",&st,NIL,NIL);
#else
    /* Yes, this version is bletcherous, but mail_fetch_message() requires
       too much memory */
    SIZEDTEXT txt,hdr;
    char *s = mail_fetch_header (stream,i,NIL,NIL,&hdr.size,FT_PEEK);
    hdr.data = (unsigned char *) memcpy (fs_get (hdr.size),s,hdr.size);
    txt.data = (unsigned char *)
      mail_fetch_text (stream,i,NIL,&txt.size,
		       ((long) args) | FT_RETURNSTRINGSTRUCT);
    PSOUT ("RFC822 {");
    pnum (hdr.size + txt.size);
    PSOUT ("}\015\012");
    ptext (&hdr,NIL);
    ptext (&txt,&stream->private.string);
    fs_give ((void **) &hdr.data);
#endif
    changed_flags (i,f);	/* output changed flags */
  }
}


/* Fetch RFC-822 header
 * Accepts: message number
 *	    extra argument
 */

void fetch_rfc822_header (unsigned long i,void *args)
{
  SIZEDTEXT st;
  st.data = (unsigned char *)
    mail_fetch_header (stream,i,NIL,NIL,&st.size,FT_PEEK);
  pbodypartstring (i,"RFC822.HEADER",&st,NIL,NIL);
}


/* Fetch RFC-822 message length
 * Accepts: message number
 *	    extra argument
 */

void fetch_rfc822_size (unsigned long i,void *args)
{
  char tmp[MAILTMPLEN];
  MESSAGECACHE *elt = mail_elt (stream,i);
  if (!elt->rfc822_size) {	/* have message size yet? */
    sprintf (tmp,"%lu",i);
    mail_fetch_fast (stream,tmp,NIL);
  }
  PSOUT ("RFC822.SIZE ");
  pnum (elt->rfc822_size);
}

/* Fetch RFC-822 text only
 * Accepts: message number
 *	    extra argument
 */

void fetch_rfc822_text (unsigned long i,void *args)
{
  if (i) {			/* do work? */
    int f = mail_elt (stream,i)->seen;
    SIZEDTEXT st;
    st.data = (unsigned char *)
      mail_fetch_text (stream,i,NIL,&st.size,
		       ((long) args) | FT_RETURNSTRINGSTRUCT);
    pbodypartstring (i,"RFC822.TEXT",&st,&stream->private.string,NIL);
  }
}

/* Print envelope
 * Accepts: body
 */

void penv (ENVELOPE *env)
{
  PBOUT ('(');			/* delimiter */
  if (env) {			/* only if there is an envelope */
    pnstring (env->date);	/* output envelope fields */
    PBOUT (' ');
    pnstring (env->subject);
    PBOUT (' ');
    paddr (env->from);
    PBOUT (' ');
    paddr (env->sender);
    PBOUT (' ');
    paddr (env->reply_to);
    PBOUT (' ');
    paddr (env->to);
    PBOUT (' ');
    paddr (env->cc);
    PBOUT (' ');
    paddr (env->bcc);
    PBOUT (' ');
    pnstring (env->in_reply_to);
    PBOUT (' ');
    pnstring (env->message_id);
  }
				/* no envelope */
  else PSOUT ("NIL NIL NIL NIL NIL NIL NIL NIL NIL NIL");
  PBOUT (')');			/* end of envelope */
}

/* Print body structure (extensible)
 * Accepts: body
 */

void pbodystructure (BODY *body)
{
  PBOUT ('(');			/* delimiter */
  if (body) {			/* only if there is a body */
    PART *part;
				/* multipart type? */
    if (body->type == TYPEMULTIPART) {
				/* print each part */
      if ((part = body->nested.part) != NULL)
	for (; part; part = part->next) pbodystructure (&(part->body));
      else pbodystructure (NIL);
      PBOUT (' ');		/* space delimiter */
      pstring (body->subtype);	/* subtype */
      PBOUT (' ');
      pparam (body->parameter);	/* multipart body extension data */
      PBOUT (' ');
      if (body->disposition.type) {
	PBOUT ('(');
	pstring (body->disposition.type);
	PBOUT (' ');
	pparam (body->disposition.parameter);
	PBOUT (')');
      }
      else PSOUT ("NIL");
      PBOUT (' ');
      pnstringorlist (body->language);
      PBOUT (' ');
      pnstring (body->location);
    }

    else {			/* non-multipart body type */
      pstring ((char *) body_types[body->type]);
      PBOUT (' ');
      pstring (body->subtype);
      PBOUT (' ');
      pparam (body->parameter);
      PBOUT (' ');
      pnstring (body->id);
      PBOUT (' ');
      pnstring (body->description);
      PBOUT (' ');
      pstring ((char *) body_encodings[body->encoding]);
      PBOUT (' ');
      pnum (body->size.bytes);
      switch (body->type) {	/* extra stuff depends upon body type */
      case TYPEMESSAGE:
				/* can't do this if not RFC822 */
	if (strcmp (body->subtype,"RFC822")) break;
	PBOUT (' ');
	penv (body->nested.msg->env);
	PBOUT (' ');
	pbodystructure (body->nested.msg->body);
      case TYPETEXT:
	PBOUT (' ');
	pnum (body->size.lines);
	break;
      default:
	break;
      }
      PBOUT (' ');
      pnstring (body->md5);
      PBOUT (' ');
      if (body->disposition.type) {
	PBOUT ('(');
	pstring (body->disposition.type);
	PBOUT (' ');
	pparam (body->disposition.parameter);
	PBOUT (')');
      }
      else PSOUT ("NIL");
      PBOUT (' ');
      pnstringorlist (body->language);
      PBOUT (' ');
      pnstring (body->location);
    }
  }
				/* no body */
  else PSOUT ("\"TEXT\" \"PLAIN\" (\"CHARSET\" \"US-ASCII\") NIL NIL \"7BIT\" 0 0 NIL NIL NIL NIL");
  PBOUT (')');			/* end of body */
}

/* Print body (non-extensible)
 * Accepts: body
 */

void pbody (BODY *body)
{
  PBOUT ('(');			/* delimiter */
  if (body) {			/* only if there is a body */
    PART *part;
				/* multipart type? */
    if (body->type == TYPEMULTIPART) {
				/* print each part */
      if ((part = body->nested.part) != NULL)
	for (; part; part = part->next) pbody (&(part->body));
      else pbody (NIL);
      PBOUT (' ');		/* space delimiter */
      pstring (body->subtype);	/* and finally the subtype */
    }
    else {			/* non-multipart body type */
      pstring ((char *) body_types[body->type]);
      PBOUT (' ');
      pstring (body->subtype);
      PBOUT (' ');
      pparam (body->parameter);
      PBOUT (' ');
      pnstring (body->id);
      PBOUT (' ');
      pnstring (body->description);
      PBOUT (' ');
      pstring ((char *) body_encodings[body->encoding]);
      PBOUT (' ');
      pnum (body->size.bytes);
      switch (body->type) {	/* extra stuff depends upon body type */
      case TYPEMESSAGE:
				/* can't do this if not RFC822 */
	if (strcmp (body->subtype,"RFC822")) break;
	PBOUT (' ');
	penv (body->nested.msg ? body->nested.msg->env : NIL);
	PBOUT (' ');
	pbody (body->nested.msg ? body->nested.msg->body : NIL);
      case TYPETEXT:
	PBOUT (' ');
	pnum (body->size.lines);
	break;
      default:
	break;
      }
    }
  }
				/* no body */
  else PSOUT ("\"TEXT\" \"PLAIN\" (\"CHARSET\" \"US-ASCII\") NIL NIL \"7BIT\" 0 0");
  PBOUT (')');			/* end of body */
}

/* Print parameter list
 * Accepts: paramter
 */

void pparam (PARAMETER *param)
{
  if (param) {			/* one specified? */
    PBOUT ('(');
    do {
      pstring (param->attribute);
      PBOUT (' ');
      pstring (param->value);
      if ((param = param->next) != NULL) PBOUT (' ');
    } while (param);
    PBOUT (')');		/* end of parameters */
  }
  else PSOUT ("NIL");
}


/* Print address list
 * Accepts: address list
 */

void paddr (ADDRESS *a)
{
  if (a) {			/* have anything in address? */
    PBOUT ('(');		/* open the address list */
    do {			/* for each address */
      PBOUT ('(');		/* open the address */
      pnstring (a->personal);	/* personal name */
      PBOUT (' ');
      pnstring (a->adl);	/* at-domain-list */
      PBOUT (' ');
      pnstring (a->mailbox);	/* mailbox */
      PBOUT (' ');
      pnstring (a->host);	/* domain name of mailbox's host */
      PBOUT (')');		/* terminate address */
    } while ((a = a->next) != NULL);	/* until end of address */
    PBOUT (')');		/* close address list */
  }
  else PSOUT ("NIL");		/* empty address */
}

/* Print set
 * Accepts: set
 */

void pset (SEARCHSET **set)
{
  SEARCHSET *cur = *set;
  while (cur) {			/* while there's a set to do */
    pnum (cur->first);		/* output first value */
    if (cur->last) {		/* if range, output second value of range */
      PBOUT (':');
      pnum (cur->last);
    }
    if ((cur = cur->next) != NULL) PBOUT (',');
  }
  mail_free_searchset (set);	/* flush set */
}


/* Print number
 * Accepts: number
 */

void pnum (unsigned long i)
{
  char tmp[MAILTMPLEN];
  sprintf (tmp,"%lu",i);
  PSOUT (tmp);
}


/* Print string
 * Accepts: string
 */

void pstring (char *s)
{
  SIZEDTEXT st;
  st.data = (unsigned char *) s;/* set up sized text */
  st.size = strlen (s);
  psizedstring (&st,NIL);	/* print string */
}


/* Print nstring
 * Accepts: string or NIL
 */

void pnstring (char *s)
{
  if (s) pstring (s);		/* print string */
  else PSOUT ("NIL");
}


/* Print atom or string
 * Accepts: astring
 */

void pastring (char *s)
{
  char *t;
  if (!*s) PSOUT ("\"\"");	/* empty string */
  else {			/* see if atom */
    for (t = s; (*t > ' ') && !(*t & 0x80) &&
	 (*t != '"') && (*t != '\\') && (*t != '(') && (*t != ')') &&
	 (*t != '{') && (*t != '%') && (*t != '*'); t++);
    if (*t) pstring (s);	/* not an atom */
    else PSOUT (s);		/* else plop down as atomic */
  }
}

/* Print sized text as quoted
 * Accepts: sized text
 */

void psizedquoted (SIZEDTEXT *s)
{
  PBOUT ('"');			/* use quoted string */
  ptext (s,NIL);
  PBOUT ('"');
}


/* Print sized text as literal
 * Accepts: sized text
 */

void psizedliteral (SIZEDTEXT *s,STRING *st)
{
  PBOUT ('{');			/* print literal size */
  pnum (s->size);
  PSOUT ("}\015\012");
  ptext (s,st);
}

/* Print sized text as literal or quoted string
 * Accepts: sized text
 *	    alternative stringstruct of text
 */

void psizedstring (SIZEDTEXT *s,STRING *st)
{
  unsigned char c;
  unsigned long i;
		
  if (s->data) {		/* if text, check if must use literal */
    for (i = 0; ((i < s->size) && ((c = s->data[i]) & 0xe0) &&
		 !(c & 0x80) && (c != '"') && (c != '\\')); ++i);
				/* must use literal if not all QUOTED-CHAR */
    if (i < s->size) psizedliteral (s,st);
    else psizedquoted (s);
  }
  else psizedliteral (s,st);
}


/* Print sized text as literal or quoted string
 * Accepts: sized text
 */

void psizedastring (SIZEDTEXT *s)
{
  unsigned long i;
  unsigned int atomp = s->size ? T : NIL;
  for (i = 0; i < s->size; i++){/* check if must use literal */
    if (!(s->data[i] & 0xe0) || (s->data[i] & 0x80) ||
	(s->data[i] == '"') || (s->data[i] == '\\')) {
      psizedliteral (s,NIL);
      return;
    }
    else switch (s->data[i]) {	/* else see if any atom-specials */
    case '(': case ')': case '{': case ' ':
    case '%': case '*':		/* list-wildcards */
    case ']':			/* resp-specials */
				/* CTL and quoted-specials in literal check */
      atomp = NIL;		/* not an atom */
    }
  }
  if (atomp) ptext (s,NIL);	/* print as atom */
  else psizedquoted (s);	/* print as quoted string */
}

/* Print string list
 * Accepts: string list
 */

void pastringlist (STRINGLIST *s)
{
  PBOUT ('(');			/* start list */
  do {
    psizedastring (&s->text);	/* output list member */
    if (s->next) PBOUT (' ');
  } while ((s = s->next) != NULL);
  PBOUT (')');			/* terminate list */
}


/* Print nstring or list of strings
 * Accepts: string / string list
 */

void pnstringorlist (STRINGLIST *s)
{
  if (!s) PSOUT ("NIL");	/* no argument given */
  else if (s->next) {		/* output list as list of strings*/
    PBOUT ('(');		/* start list */
    do {			/* output list member */
      psizedstring (&s->text,NIL);
      if (s->next) PBOUT (' ');
    } while ((s = s->next) != NULL);
    PBOUT (')');		/* terminate list */
  } 
				/* and single-element list as string */
  else psizedstring (&s->text,NIL);
}

/* Print body part string
 * Accepts: message number
 *	    body part id (note: must have space at end to append stuff)
 *	    sized text of string
 *	    alternative stringstruct of string
 *	    text printing arguments
 */

void pbodypartstring (unsigned long msgno,char *id,SIZEDTEXT *st,STRING *bs,
		      TEXTARGS *ta)
{
  int f = mail_elt (stream,msgno)->seen;
				/* ignore stringstruct if non-initialized */
  if (bs && !bs->curpos) bs = NIL;
  if (ta && st->size) {		/* only if have useful data */
				/* partial specifier */
    if (ta->first || ta->last) sprintf (id + strlen (id),"<%lu>",ta->first);
  				/* in case first byte beyond end of text */
    if (st->size <= ta->first) st->size = ta->first = 0;
    else {
      if (st->data) {		/* offset and truncate */
	st->data += ta->first;	/* move to desired position */
	st->size -= ta->first;	/* reduced size */
      }
      else if (bs && (SIZE (bs) >= ta->first))
	SETPOS (bs,ta->first + GETPOS (bs));
      else st->size = 0;	/* shouldn't happen */
      if (ta->last && (st->size > ta->last)) st->size = ta->last;
    }
  }
  PSOUT (id);
  PBOUT (' ');
  psizedstring (st,bs);		/* output string */
  changed_flags (msgno,f);	/* and changed flags */
}

/*  RFC 3501 technically forbids NULs in literals.  Normally, the delivering
 * MTA would take care of MIME converting the message text so that it is
 * NUL-free.  If it doesn't, then we have the choice of either violating
 * IMAP by sending NULs, corrupting the data, or going to lots of work to do
 * MIME conversion in the IMAP server.
 */

/* Print raw sized text
 * Accepts: sizedtext
 */

void ptext (SIZEDTEXT *txt,STRING *st)
{
  unsigned char c,*s;
  unsigned long i = txt->size;
  if ((s = txt->data) != NULL) while (i && ((PBOUT ((c = *s++) ? c : 0x80) != EOF))) --i;
  else if (st) while (i && (PBOUT ((c = SNX (st)) ? c : 0x80) != EOF)) --i;
				/* failed to complete? */
  if (i) ioerror (stdout,"writing text");
}

/* Print thread
 * Accepts: thread
 */

void pthread (THREADNODE *thr)
{
  THREADNODE *t;
  while (thr) {			/* for each branch */
    PBOUT ('(');		/* open branch */
    if (thr->num) {		/* first node message number */
      pnum (thr->num);
      if ((t = thr->next) != NULL) {	/* any subsequent nodes? */
	PBOUT (' ');
	while (t) {		/* for each subsequent node */
	  if (t->branch) {	/* branches? */
	    pthread (t);	/* yes, recurse to do branch */
	    t = NIL;		/* done */
	  }
	  else {		/* just output this number */
	    pnum (t->num);
	    t = t->next;	/* and do next message */
	  }
	  if (t) PBOUT (' ');	/* delimit if more to come */
	}
      }
    }
    else pthread (thr->next);	/* nest for dummy */
    PBOUT (')');		/* done with this branch */
    thr = thr->branch;		/* do next branch */
  }
}

/* Print capabilities
 * Accepts: option flag
 */

void pcapability (long flag)
{
  unsigned long i;
  char *s;
  struct stat sbuf;
  AUTHENTICATOR *auth;
  THREADER *thr = (THREADER *) mail_parameters (NIL,GET_THREADERS,NIL);
				/* always output protocol level */
  PSOUT ("CAPABILITY IMAP4REV1 I18NLEVEL=1 LITERAL+");
#ifdef NETSCAPE_BRAIN_DAMAGE
  PSOUT (" X-NETSCAPE");
#endif
  if (flag >= 0) {		/* want post-authentication capabilities? */
    PSOUT (" IDLE UIDPLUS NAMESPACE CHILDREN MAILBOX-REFERRALS BINARY UNSELECT");
#ifdef ESEARCH
    PSOUT (" ESEARCH");
#endif
    PSOUT (" WITHIN SORT");
    while (thr) {		/* threaders */
      PSOUT (" THREAD=");
      PSOUT (thr->name);
      thr = thr->next;
    }
    if (!anonymous) PSOUT (" MULTIAPPEND");
    PSOUT (" SCAN");		/* private extension */
  }
  if (flag <= 0) {		/* want pre-authentication capabilities? */
    PSOUT (" SASL-IR LOGIN-REFERRALS");
    if ((s = ssl_start_tls (NIL)) != NULL) fs_give ((void **) &s);
    else PSOUT (" STARTTLS");
				/* disable plaintext */
    if (!(i = !mail_parameters (NIL,GET_DISABLEPLAINTEXT,NIL)))
      PSOUT (" LOGINDISABLED");
    for (auth = mail_lookup_auth (1); auth; auth = auth->next)
      if (auth->server && !(auth->flags & AU_DISABLE) &&
	  !(auth->flags & AU_HIDE) && (i || (auth->flags & AU_SECURE))) {
	PSOUT (" AUTH=");
	PSOUT (auth->name);
      }
    if (!stat (ANOFILE,&sbuf)) PSOUT (" AUTH=ANONYMOUS");
  }
}

/* Anonymous users may only use these mailboxes in these namespaces */

char *oktab[] = {"#news.", "#ftp/", "#public/", 0};


/* Check if mailbox name is OK
 * Accepts: reference name
 *	    mailbox name
 */

long nameok (char *ref,char *name)
{
  int i;
  unsigned char *s,*t;
  if (!name) return NIL;	/* failure if missing name */
  if (!anonymous) return T;	/* otherwise OK if not anonymous */
				/* validate reference */
  if (ref && ((*ref == '#') || (*ref == '{')))
    for (i = 0; oktab[i]; i++) {
      for (s = ref, t = oktab[i]; *t && !compare_uchar (*s,*t); s++, t++);
      if (!*t) {		/* reference OK */
	if (*name == '#') break;/* check name if override */
	else return T;		/* otherwise done */
      }
    }
				/* ordinary names are OK */
  if ((*name != '#') && (*name != '{')) return T;
  for (i = 0; oktab[i]; i++) {	/* validate mailbox */
    for (s = name, t = oktab[i]; *t && !compare_uchar (*s,*t); s++, t++);
    if (!*t) return T;		/* name is OK */
  }
  response = "%.80s NO Anonymous may not %.80s this name\015\012";
  return NIL;
}


/* Convert possible BBoard name to actual name
 * Accepts: command
 *	    mailbox name
 * Returns: maibox name
 */

char *bboardname (char *cmd,char *name)
{
  if (cmd[0] == 'B') {		/* want bboard? */
    char *s = litstk[litsp++] = (char *) fs_get (strlen (name) + 9);
    sprintf (s,"#public/%s",(*name == '/') ? name+1 : name);
    name = s;
  }
  return name;
}

/* Test if name is news proxy
 * Accepts: name
 * Returns: T if news proxy, NIL otherwise
 */

long isnewsproxy (char *name)
{
  return (nntpproxy && (name[0] == '#') &&
	  ((name[1] == 'N') || (name[1] == 'n')) &&
	  ((name[2] == 'E') || (name[2] == 'e')) &&
	  ((name[3] == 'W') || (name[3] == 'w')) &&
	  ((name[4] == 'S') || (name[4] == 's')) && (name[5] == '.')) ?
    LONGT : NIL;
}


/* News proxy generate canonical pattern
 * Accepts: reference
 *	    pattern
 *	    buffer to return canonical pattern
 * Returns: T on success with pattern in buffer, NIL on failure
 */

long newsproxypattern (char *ref,char *pat,char *pattern,long flag)
{
  if (!nntpproxy) return NIL;
  if (strlen (ref) > NETMAXMBX) {
    sprintf (pattern,"Invalid reference specification: %.80s",ref);
    mm_log (pattern,ERROR);
    return NIL;
  }
  if (strlen (pat) > NETMAXMBX) {
    sprintf (pattern,"Invalid pattern specification: %.80s",pat);
    mm_log (pattern,ERROR);
    return NIL;
  }
  if (flag) {			/* prepend proxy specifier */
    sprintf (pattern,"{%.300s/nntp}",nntpproxy);
    pattern += strlen (pattern);
  }
  if (*ref) {			/* have a reference */
    strcpy (pattern,ref);	/* copy reference to pattern */
				/* # overrides mailbox field in reference */
    if (*pat == '#') strcpy (pattern,pat);
				/* pattern starts, reference ends, with . */
    else if ((*pat == '.') && (pattern[strlen (pattern) - 1] == '.'))
      strcat (pattern,pat + 1);	/* append, omitting one of the period */
    else strcat (pattern,pat);	/* anything else is just appended */
  }
  else strcpy (pattern,pat);	/* just have basic name */
  return isnewsproxy (pattern);
}

/* IMAP4rev1 Authentication responder
 * Accepts: challenge
 *	    length of challenge
 *	    pointer to response length return location if non-NIL
 * Returns: response
 */

#define RESPBUFLEN 8*MAILTMPLEN

char *imap_responder (void *challenge,unsigned long clen,unsigned long *rlen)
{
  unsigned long i,j;
  unsigned char *t,resp[RESPBUFLEN];
  if (initial) {		/* initial response given? */
    if (clen) return NIL;	/* not permitted */
				/* set up response */
    i = strlen ((char *) (t = initial));
    initial = NIL;		/* no more initial response */
    if ((*t == '=') && !t[1]) {	/* SASL-IR does this for 0-length response */
      if (rlen) *rlen = 0;	/* set length zero if empty */
      return cpystr ("");	/* and return empty string as response */
    }
  }
  else {			/* issue challenge, get response */
    PSOUT ("+ ");
    for (t = rfc822_binary ((void *) challenge,clen,&i),j = 0; j < i; j++)
      if (t[j] > ' ') PBOUT (t[j]);
    fs_give ((void **) &t);
    CRLF;
    PFLUSH ();			/* dump output buffer */
				/* slurp response buffer */
    slurp ((char *) resp,RESPBUFLEN,INPUTTIMEOUT);
    if (!(t = (unsigned char *) strchr ((char *) resp,'\012')))
      return (char *) flush ();
    if (t[-1] == '\015') --t;	/* remove CR */
    *t = '\0';			/* tie off buffer */
    if (resp[0] == '*') {
      cancelled = T;
      return NIL;
    }
    i = t - resp;		/* length of response */
    t = resp;			/* set up for return call */
  }
  return (i % 4) ? NIL :	/* return if valid BASE64 */
    (char *) rfc822_base64 (t,i,rlen ? rlen : &i);
}

/* Proxy copy across mailbox formats
 * Accepts: mail stream
 *	    sequence to copy on this stream
 *	    destination mailbox
 *	    option flags
 * Returns: T if success, else NIL
 */

long proxycopy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
  MAILSTREAM *ts;
  STRING st;
  MSGDATA md;
  SEARCHSET *set;
  char tmp[MAILTMPLEN];
  unsigned long i,j;
  md.stream = stream;
  md.msgno = 0;
  md.flags = md.date = NIL;
  md.message = &st;
  /* Currently ignores CP_MOVE and CP_DEBUG */
  if (!((options & CP_UID) ?	/* validate sequence */
	mail_uid_sequence (stream,sequence) : mail_sequence (stream,sequence)))
    return NIL;
  response = win;		/* cancel previous errors */
  if (lsterr) fs_give ((void **) &lsterr);
				/* c-client clobbers sequence, use spare */
  for (i = 1,j = 0,set = mail_newsearchset (); i <= nmsgs; i++)
    if ((mail_elt (stream,i)->spare = mail_elt (stream,i)->sequence) != 0L) {
      mail_append_set (set,mail_uid (stream,i));
      if (!j) md.msgno = (j = i) - 1;
    }
				/* only if at least one message to copy */
  if (j && !mail_append_multiple (NIL,mailbox,proxy_append,(void *) &md)) {
    response = trycreate ? losetry : lose;
    if (set) mail_free_searchset (&set);
    return NIL;
  }
  if (caset) csset = set;	/* set for return value now */
  else if (set) mail_free_searchset (&set);
  response = win;		/* stomp any previous babble */
  if (md.msgno) {		/* get new driver name if was dummy */
    sprintf (tmp,"Cross-format (%.80s -> %.80s) COPY completed",
	     stream->dtb->name,(ts = mail_open (NIL,mailbox,OP_PROTOTYPE)) ?
	     ts->dtb->name : "unknown");
    mm_log (tmp,NIL);
  }
  return LONGT;
}

/* Proxy append message callback
 * Accepts: MAIL stream
 *	    append data package
 *	    pointer to return initial flags
 *	    pointer to return message internal date
 *	    pointer to return stringstruct of message or NIL to stop
 * Returns: T if success (have message or stop), NIL if error
 */

long proxy_append (MAILSTREAM *stream,void *data,char **flags,char **date,
		   STRING **message)
{
  MESSAGECACHE *elt;
  unsigned long i;
  char *s,*t,tmp[MAILTMPLEN];
  MSGDATA *md = (MSGDATA *) data;
  if (md->flags) fs_give ((void **) &md->flags);
  if (md->date) fs_give ((void **) &md->date);
  *message = NIL;		/* assume all done */
  *flags = *date = NIL;
  while (++md->msgno <= nmsgs)
    if ((elt = mail_elt (md->stream,md->msgno))->spare) {
      if (!(elt->valid && elt->day)) {
	sprintf (tmp,"%lu",md->msgno);
	mail_fetch_fast (md->stream,tmp,NIL);
      }
      memset (s = tmp,0,MAILTMPLEN);
				/* copy flags */
      if (elt->seen) strcat (s," \\Seen");
      if (elt->deleted) strcat (s," \\Deleted");
      if (elt->flagged) strcat (s," \\Flagged");
      if (elt->answered) strcat (s," \\Answered");
      if (elt->draft) strcat (s," \\Draft");
      if ((i = elt->user_flags) != 0L) do 
	if ((t = md->stream->user_flags[find_rightmost_bit (&i)]) && *t &&
	    (strlen (t) < ((size_t) (MAILTMPLEN-((s += strlen (s))+2-tmp))))) {
	*s++ = ' ';		/* space delimiter */
	strcpy (s,t);
      } while (i);		/* until no more user flags */
      *message = md->message;	/* set up return values */
      *flags = md->flags = cpystr (tmp + 1);
      *date = md->date = cpystr (mail_date (tmp,elt));
      INIT (md->message,msg_string,(void *) md,elt->rfc822_size);
      break;			/* process this message */
    }
  return LONGT;
}

/* Append message callback
 * Accepts: MAIL stream
 *	    append data package
 *	    pointer to return initial flags
 *	    pointer to return message internal date
 *	    pointer to return stringstruct of message or NIL to stop
 * Returns: T if success (have message or stop), NIL if error
 */

long append_msg (MAILSTREAM *stream,void *data,char **flags,char **date,
		 STRING **message)
{
  unsigned long i,j;
  char *t;
  APPENDDATA *ad = (APPENDDATA *) data;
  unsigned char *arg = ad->arg;
				/* flush text of previous message */
  if ((t = ad->flags) != NULL) fs_give ((void **) &ad->flags);
  if ((t = ad->date) != NULL) fs_give ((void **) &ad->date);
  if ((t = ad->msg) != NULL) fs_give ((void **) &ad->msg);
  *flags = *date = NIL;		/* assume no flags or date */
  if (t) {			/* have previous message? */
    if (!*arg) {		/* if least one message, and no more coming */
      *message = NIL;		/* set stop */
      return LONGT;		/* return success */
    }
    else if (*arg++ != ' ') {	/* must have a delimiter to next argument */
      response = misarg;	/* oops */
      return NIL;
    }
  }
  *message = ad->message;	/* return pointer to message stringstruct */
  if (*arg == '(') {		/* parse optional flag list */
    t = ++arg;			/* pointer to flag list contents */
    while (*arg && (*arg != ')')) arg++;
    if (*arg) *arg++ = '\0';
    if (*arg == ' ') arg++;
    *flags = ad->flags = cpystr (t);
  }
				/* parse optional date */
  if (*arg == '"') *date = ad->date = cpystr (snarf (&arg));
  if (!arg || (*arg != '{'))	/* parse message */
    response = "%.80s BAD Missing literal in %.80s\015\012";
  else if (!isdigit (arg[1]))
    response = "%.80s BAD Missing message to %.80s\015\012";
  else if (!(i = strtoul (arg+1,&t,10)))
    response = "%.80s NO Empty message to %.80s\015\012";
  else if (i > MAXAPPENDTXT)	/* maybe relax this a little */
    response = "%.80s NO Excessively large message to %.80s\015\012";
  else if (((*t == '+') && (t[1] == '}') && !t[2]) || ((*t == '}') && !t[1])) {
				/* get a literal buffer */
    inliteral (ad->msg = (char *) fs_get (i+1),i);
    				/* get new command tail */
    slurp (ad->arg,CMDLEN - (ad->arg - cmdbuf),INPUTTIMEOUT);
    if (strchr (ad->arg,'\012')) {
				/* reset strtok mechanism, tie off if done */
      if (!strtok_r (ad->arg,"\015\012",&sstate)) *ad->arg = '\0';
				/* possible LITERAL+? */
      if (((j = strlen (ad->arg)) > 3) && (ad->arg[j - 1] == '}') &&
	  (ad->arg[j - 2] == '+') && isdigit (ad->arg[j - 3])) {
				/* back over possible count */
	for (j -= 4; j && isdigit (ad->arg[j]); j--);
	if (ad->arg[j] == '{') {/* found a literal? */
	  litplus.ok = T;	/* yes, note LITERAL+ in effect, set size */
	  litplus.size = strtoul (ad->arg + j + 1,NIL,10);
	}
      }
				/* initialize stringstruct */
      INIT (ad->message,mail_string,(void *) ad->msg,i);
      return LONGT;		/* ready to go */
    }
    flush ();			/* didn't find end of line? */
    fs_give ((void **) &ad->msg);
  }
  else response = badarg;	/* not a literal */
  return NIL;			/* error */
}

/* Got COPY UID data
 * Accepts: MAIL stream
 *	    mailbox name
 *	    UID validity
 *	    source set of UIDs
 *	    destination set of UIDs
 */

void copyuid (MAILSTREAM *stream,char *mailbox,unsigned long uidvalidity,
	      SEARCHSET *sourceset,SEARCHSET *destset)
{
  if (cauidvalidity) fatal ("duplicate COPYUID/APPENDUID data");
  cauidvalidity = uidvalidity;
  csset = sourceset;
  caset = destset;
}


/* Got APPEND UID data
 * Accepts: mailbox name
 *	    UID validity
 *	    destination set of UIDs
 */

void appenduid (char *mailbox,unsigned long uidvalidity,SEARCHSET *set)
{
  copyuid (NIL,mailbox,uidvalidity,NIL,set);
}


/* Got a referral
 * Accepts: MAIL stream
 *	    URL
 *	    referral type code
 */

char *referral (MAILSTREAM *stream,char *url,long code)
{
  if (lstref) fs_give ((void **) &lstref);
  lstref = cpystr (url);	/* set referral */
				/* set error if not a logged in referral */
  if (code != REFAUTH) response = lose;
  if (!lsterr) lsterr = cpystr ("Try referral URL");
  return NIL;			/* don't chase referrals for now */
}

/* Co-routines from MAIL library */


/* Message matches a search
 * Accepts: MAIL stream
 *	    message number
 */

void mm_searched (MAILSTREAM *s,unsigned long msgno)
{
				/* nothing to do here */
}


/* Message exists (i.e. there are that many messages in the mailbox)
 * Accepts: MAIL stream
 *	    message number
 */

void mm_exists (MAILSTREAM *s,unsigned long number)
{
				/* note change in number of messages */
  if ((s != tstream) && (nmsgs != number)) {
    nmsgs = number;		/* always update number of messages */
    if (quell_events) existsquelled = T;
    else {
      PSOUT ("* ");
      pnum (nmsgs);
      PSOUT (" EXISTS\015\012");
    }
    recent = 0xffffffff;	/* make sure update recent too */
  }
}


/* Message expunged
 * Accepts: MAIL stream
 *	    message number
 */

void mm_expunged (MAILSTREAM *s,unsigned long number)
{
  if (quell_events) fatal ("Impossible EXPUNGE event");
  if (s != tstream) {
    PSOUT ("* ");
    pnum (number);
    PSOUT (" EXPUNGE\015\012");
  }
  nmsgs--;
  existsquelled = T;		/* do EXISTS when command done */
}


/* Message status changed
 * Accepts: MAIL stream
 *	    message number
 */

void mm_flags (MAILSTREAM *s,unsigned long number)
{
  if (s != tstream) mail_elt (s,number)->spare2 = T;
}

/* Mailbox found
 * Accepts: hierarchy delimiter
 *	    mailbox name
 *	    attributes
 */

void mm_list (MAILSTREAM *stream,int delimiter,char *name,long attributes)
{
  mm_list_work ("LIST",delimiter,name,attributes);
}


/* Subscribed mailbox found
 * Accepts: hierarchy delimiter
 *	    mailbox name
 *	    attributes
 */

void mm_lsub (MAILSTREAM *stream,int delimiter,char *name,long attributes)
{
  mm_list_work ("LSUB",delimiter,name,attributes);
}


/* Mailbox status
 * Accepts: MAIL stream
 *	    mailbox name
 *	    mailbox status
 */

void mm_status (MAILSTREAM *stream,char *mailbox,MAILSTATUS *status)
{
  if (!quell_events) {
    char tmp[MAILTMPLEN];
    tmp[0] = tmp[1] = '\0';
    if (status->flags & SA_MESSAGES)
      sprintf (tmp + strlen (tmp)," MESSAGES %lu",status->messages);
    if (status->flags & SA_RECENT)
      sprintf (tmp + strlen (tmp)," RECENT %lu",status->recent);
    if (status->flags & SA_UNSEEN)
      sprintf (tmp + strlen (tmp)," UNSEEN %lu",status->unseen);
    if (status->flags & SA_UIDNEXT)
      sprintf (tmp + strlen (tmp)," UIDNEXT %lu",status->uidnext);
    if (status->flags & SA_UIDVALIDITY)
      sprintf (tmp + strlen(tmp)," UIDVALIDITY %lu",status->uidvalidity);
    PSOUT ("* STATUS ");
    pastring (mailbox);
    PSOUT (" (");
    PSOUT (tmp+1);
    PBOUT (')');
    CRLF;
  }
}

/* Worker routine for LIST and LSUB
 * Accepts: name of response
 *	    hierarchy delimiter
 *	    mailbox name
 *	    attributes
 */

void mm_list_work (char *what,int delimiter,char *name,long attributes)
{
  char *s;
  if (!quell_events) {
    char tmp[MAILTMPLEN];
    if (finding) {
      PSOUT ("* MAILBOX ");
      PSOUT (name);
    }
				/* new form */
    else if ((cmd[0] == 'R') || !(attributes & LATT_REFERRAL)) {
      PSOUT ("* ");
      PSOUT (what);
      PSOUT (" (");
      tmp[0] = tmp[1] = '\0';
      if (attributes & LATT_NOINFERIORS) strcat (tmp," \\NoInferiors");
      if (attributes & LATT_NOSELECT) strcat (tmp," \\NoSelect");
      if (attributes & LATT_MARKED) strcat (tmp," \\Marked");
      if (attributes & LATT_UNMARKED) strcat (tmp," \\UnMarked");
      if (attributes & LATT_HASCHILDREN) strcat (tmp," \\HasChildren");
      if (attributes & LATT_HASNOCHILDREN) strcat (tmp," \\HasNoChildren");
      PSOUT (tmp+1);
      switch (delimiter) {
      case '\\':		/* quoted delimiter */
      case '"':
	PSOUT (") \"\\");
	PBOUT (delimiter);
	PBOUT ('"');
	break;
      case '\0':		/* no delimiter */
	PSOUT (") NIL");
	break;
      default:			/* unquoted delimiter */
	PSOUT (") \"");
	PBOUT (delimiter);
	PBOUT ('"');
	break;
      }
      PBOUT (' ');
				/* output mailbox name */
      if (proxylist && (s = strchr (name,'}'))) pastring (s+1);
      else pastring (name);
    }
    CRLF;
  }
}

/* Notification event
 * Accepts: MAIL stream
 *	    string to log
 *	    error flag
 */

void mm_notify (MAILSTREAM *stream,char *string,long errflg)
{
  SIZEDTEXT msg;
  char *s,*code;
  if (!quell_events && (!tstream || (stream != tstream))) {
    switch (errflg) {
    case NIL:			/* information message, set as OK response */
      if ((string[0] == '[') &&
	  ((string[1] == 'T') || (string[1] == 't')) &&
	  ((string[2] == 'R') || (string[2] == 'r')) &&
	  ((string[3] == 'Y') || (string[3] == 'y')) &&
	  ((string[4] == 'C') || (string[4] == 'c')) &&
	  ((string[5] == 'R') || (string[5] == 'r')) &&
	  ((string[6] == 'E') || (string[6] == 'e')) &&
	  ((string[7] == 'A') || (string[7] == 'a')) &&
	  ((string[8] == 'T') || (string[8] == 't')) &&
	  ((string[9] == 'E') || (string[9] == 'e')) && (string[10] == ']'))
	trycreate = T;
    case BYE:			/* some other server signing off */
    case PARSE:			/* parse glitch, output unsolicited OK */
      code = "* OK ";
      break;
    case WARN:			/* warning, output unsolicited NO (kludge!) */
      code = "* NO ";
      break;
    case ERROR:			/* error that broke command */
    default:			/* default should never happen */
      code = "* BAD ";
      break;
    }
    PSOUT (code);
    msg.size = (s = strpbrk ((char *) (msg.data = (unsigned char *) string),
			     "\015\012")) ?
      (s - string) : strlen (string);
    PSOUTR (&msg);
    CRLF;
    PFLUSH ();			/* let client see it immediately */
  }
}

/* Log an event for the user to see
 * Accepts: string to log
 *	    error flag
 */

void mm_log (char *string,long errflg)
{
  SIZEDTEXT msg;
  char *s;
  msg.size = 
    (s = strpbrk ((char *) (msg.data = (unsigned char *) string),"\015\012")) ?
      (s - string) : strlen (string);
  switch (errflg) {
  case NIL:			/* information message, set as OK response */
    if (response == win) {	/* only if no other response yet */
      if (lsterr) {		/* if there was a previous message */
	if (!quell_events) {
	  PSOUT ("* OK ");	/* blat it out */
	  PSOUT (lsterr);
	  CRLF;
	  PFLUSH ();		/* let client see it immediately */
	}
	fs_give ((void **) &lsterr);
      }
      lsterr = cpystr (string); /* copy string for later use */
      if (s) lsterr[s - string] = NIL;
    }
    break;
  case PARSE:			/* parse glitch, output unsolicited OK */
    if (!quell_events) {
      PSOUT ("* OK [PARSE] ");
      PSOUTR (&msg);
      CRLF;
      PFLUSH ();		/* let client see it immediately */
    }
    break;
  case WARN:			/* warning, output unsolicited NO */
				/* ignore "Mailbox is empty" (KLUDGE!) */
    if (strcmp (string,"Mailbox is empty")) {
      if (lstwrn) {		/* have previous warning? */
	if (!quell_events) {
	  PSOUT ("* NO ");
	  PSOUT (lstwrn);
	  CRLF;
	  PFLUSH ();		/* make sure client sees it immediately */
	}
	fs_give ((void **) &lstwrn);
      }
      lstwrn = cpystr (string); /* note last warning */
      if (s) lstwrn[s - string] = NIL;
    }
    break;
  case ERROR:			/* error that broke command */
  default:			/* default should never happen */
    response = trycreate ? losetry : lose;
    if (lsterr) fs_give ((void **) &lsterr);
    lsterr = cpystr (string);	/* note last error */
    if (s) lsterr[s - string] = NIL;
    break;
  }
}

/* Return last error
 */

char *lasterror (void)
{
  if (lsterr) return lsterr;
  if (lstwrn) return lstwrn;
  return "<unknown>";
}


/* Log an event to debugging telemetry
 * Accepts: string to log
 */

void mm_dlog (char *string)
{
  mm_log (string,WARN);		/* shouldn't happen normally */
}

/* Get user name and password for this host
 * Accepts: parse of network user name
 *	    where to return user name
 *	    where to return password
 *	    trial count
 */

void mm_login (NETMBX *mb,char *username,char *password,long trial)
{
				/* set user name */
  strncpy (username,*mb->user ? mb->user : (char *) user,NETMAXUSER);
  strncpy (password,pass,256);	/* and password */
}


/* About to enter critical code
 * Accepts: stream
 */

void mm_critical (MAILSTREAM *s)
{
  ++critical;
}


/* About to exit critical code
 * Accepts: stream
 */

void mm_nocritical (MAILSTREAM *s)
{
				/* go non-critical, pending death? */
  if (!--critical && (state == LOGOUT)) {
				/* clean up iff needed */
    if (s && (stream != s) && !s->lock && (s->dtb->flags & DR_XPOINT))
      s = mail_close (s);
    longjmp (jmpenv,1);		/* die now */
  }
}

/* Disk error found
 * Accepts: stream
 *	    system error code
 *	    flag indicating that mailbox may be clobbered
 * Returns: abort flag
 */

long mm_diskerror (MAILSTREAM *s,long errcode,long serious)
{
  if (serious) {		/* try your damnest if clobberage likely */
    mm_notify (s,"Retrying to fix probable mailbox damage!",ERROR);
    PFLUSH ();			/* dump output buffer */
    syslog (LOG_ALERT,
	    "Retrying after disk error user=%.80s host=%.80s mbx=%.80s: %.80s",
	    user ? (char *) user : "???",tcp_clienthost (),
	    (stream && stream->mailbox) ? stream->mailbox : "???",
	    strerror (errcode));
    settimeout (0);		/* make damn sure timeout disabled */
    sleep (60);			/* give it some time to clear up */
    return NIL;
  }
  if (!quell_events) {		/* otherwise die before more damage is done */
    PSOUT ("* NO Disk error: ");
    PSOUT (strerror (errcode));
    CRLF;
  }
  return T;
}


/* Log a fatal error event
 * Accepts: string to log
 */

void mm_fatal (char *string)
{
  SIZEDTEXT msg;
  char *s;
  msg.size = 
    (s = strpbrk ((char *) (msg.data = (unsigned char *) string),"\015\012")) ?
      (s - string) : strlen (string);
  if (!quell_events) {
    PSOUT ("* BYE [ALERT] IMAP4rev1 server crashing: ");
    PSOUTR (&msg);
    CRLF;
    PFLUSH ();
  }
  syslog (LOG_ALERT,"Fatal error user=%.80s host=%.80s mbx=%.80s: %.80s",
	  user ? (char *) user : "???",tcp_clienthost (),
	  (stream && stream->mailbox) ? stream->mailbox : "???",string);
}