summaryrefslogtreecommitdiff
path: root/src/test.c
blob: dcb83536c88c1cd181fab28ef0668a9622d49065 (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
/* GNU test program (ksb and mjb) */

/* Modified to run with the GNU shell by bfox. */

/* Copyright (C) 1987-2017 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* Define TEST_STANDALONE to get the /bin/test version.  Otherwise, you get
   the shell builtin version. */

/* Without this pragma, gcc 4.6.2 20111027 mistakenly suggests that
   the advance function might be candidate for attribute 'pure'.  */
#if (__GNUC__ == 4 && 6 <= __GNUC_MINOR__) || 4 < __GNUC__
# pragma GCC diagnostic ignored "-Wsuggest-attribute=pure"
#endif

#include <config.h>
#include <stdio.h>
#include <sys/types.h>

#define TEST_STANDALONE 1

#ifndef LBRACKET
# define LBRACKET 0
#endif

/* The official name of this program (e.g., no 'g' prefix).  */
#if LBRACKET
# define PROGRAM_NAME "["
#else
# define PROGRAM_NAME "test"
#endif

#include "system.h"
#include "quote.h"
#include "stat-time.h"
#include "strnumcmp.h"

#include <stdarg.h>
#include "verror.h"

#if HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif

/* Exit status for syntax errors, etc.  */
enum { TEST_TRUE, TEST_FALSE, TEST_FAILURE };

#if defined TEST_STANDALONE
# define test_exit(val) exit (val)
# define test_main_return(val) return val
#else
   static jmp_buf test_exit_buf;
   static int test_error_return = 0;
# define test_exit(val) test_error_return = val, longjmp (test_exit_buf, 1)
# define test_main_return(val) test_exit (val)
#endif /* !TEST_STANDALONE */

static int pos;		/* The offset of the current argument in ARGV. */
static int argc;	/* The number of arguments present in ARGV. */
static char **argv;	/* The argument list. */

static bool test_unop (char const *s);
static bool unary_operator (void);
static bool binary_operator (bool);
static bool two_arguments (void);
static bool three_arguments (void);
static bool posixtest (int);

static bool expr (void);
static bool term (void);
static bool and (void);
static bool or (void);

static void test_syntax_error (char const *format, ...)
     ATTRIBUTE_NORETURN;
static void beyond (void) ATTRIBUTE_NORETURN;

static void
test_syntax_error (char const *format, ...)
{
  va_list ap;
  va_start (ap, format);
  verror (0, 0, format, ap);
  test_exit (TEST_FAILURE);
}

/* Increment our position in the argument list.  Check that we're not
   past the end of the argument list.  This check is suppressed if the
   argument is false.  */

static void
advance (bool f)
{
  ++pos;

  if (f && pos >= argc)
    beyond ();
}

static void
unary_advance (void)
{
  advance (true);
  ++pos;
}

/*
 * beyond - call when we're beyond the end of the argument list (an
 *	error condition)
 */
static void
beyond (void)
{
  test_syntax_error (_("missing argument after %s"), quote (argv[argc - 1]));
}

/* If the characters pointed to by STRING constitute a valid number,
   return a pointer to the start of the number, skipping any blanks or
   leading '+'.  Otherwise, report an error and exit.  */
static char const *
find_int (char const *string)
{
  char const *p;
  char const *number_start;

  for (p = string; isblank (to_uchar (*p)); p++)
    continue;

  if (*p == '+')
    {
      p++;
      number_start = p;
    }
  else
    {
      number_start = p;
      p += (*p == '-');
    }

  if (ISDIGIT (*p++))
    {
      while (ISDIGIT (*p))
        p++;
      while (isblank (to_uchar (*p)))
        p++;
      if (!*p)
        return number_start;
    }

  test_syntax_error (_("invalid integer %s"), quote (string));
}

/* Find the modification time of FILE, and stuff it into *MTIME.
   Return true if successful.  */
static bool
get_mtime (char const *filename, struct timespec *mtime)
{
  struct stat finfo;
  bool ok = (stat (filename, &finfo) == 0);
#ifdef lint
  static struct timespec const zero;
  *mtime = zero;
#endif
  if (ok)
    *mtime = get_stat_mtime (&finfo);
  return ok;
}

/* Return true if S is one of the test command's binary operators.  */
static bool
binop (char const *s)
{
  return ((STREQ (s,   "=")) || (STREQ (s,  "!=")) || (STREQ (s, "==")) ||
          (STREQ (s,   "-nt")) ||
          (STREQ (s, "-ot")) || (STREQ (s, "-ef")) || (STREQ (s, "-eq")) ||
          (STREQ (s, "-ne")) || (STREQ (s, "-lt")) || (STREQ (s, "-le")) ||
          (STREQ (s, "-gt")) || (STREQ (s, "-ge")));
}

/*
 * term - parse a term and return 1 or 0 depending on whether the term
 *	evaluates to true or false, respectively.
 *
 * term ::=
 *	'-'('h'|'d'|'f'|'r'|'s'|'w'|'c'|'b'|'p'|'u'|'g'|'k') filename
 *	'-'('L'|'x') filename
 *	'-t' int
 *	'-'('z'|'n') string
 *	string
 *	string ('!='|'=') string
 *	<int> '-'(eq|ne|le|lt|ge|gt) <int>
 *	file '-'(nt|ot|ef) file
 *	'(' <expr> ')'
 * int ::=
 *	'-l' string
 *	positive and negative integers
 */
static bool
term (void)
{
  bool value;
  bool negated = false;

  /* Deal with leading 'not's.  */
  while (pos < argc && argv[pos][0] == '!' && argv[pos][1] == '\0')
    {
      advance (true);
      negated = !negated;
    }

  if (pos >= argc)
    beyond ();

  /* A paren-bracketed argument. */
  if (argv[pos][0] == '(' && argv[pos][1] == '\0')
    {
      int nargs;

      advance (true);

      for (nargs = 1;
           pos + nargs < argc && ! STREQ (argv[pos + nargs], ")");
           nargs++)
        if (nargs == 4)
          {
            nargs = argc - pos;
            break;
          }

      value = posixtest (nargs);
      if (argv[pos] == 0)
        test_syntax_error (_("%s expected"), quote (")"));
      else
        if (argv[pos][0] != ')' || argv[pos][1])
          test_syntax_error (_("%s expected, found %s"),
                             quote_n (0, ")"), quote_n (1, argv[pos]));
      advance (false);
    }

  /* Are there enough arguments left that this could be dyadic?  */
  else if (4 <= argc - pos && STREQ (argv[pos], "-l") && binop (argv[pos + 2]))
    value = binary_operator (true);
  else if (3 <= argc - pos && binop (argv[pos + 1]))
    value = binary_operator (false);

  /* It might be a switch type argument.  */
  else if (argv[pos][0] == '-' && argv[pos][1] && argv[pos][2] == '\0')
    {
      if (test_unop (argv[pos]))
        value = unary_operator ();
      else
        test_syntax_error (_("%s: unary operator expected"), quote (argv[pos]));
    }
  else
    {
      value = (argv[pos][0] != '\0');
      advance (false);
    }

  return negated ^ value;
}

static bool
binary_operator (bool l_is_l)
{
  int op;
  struct stat stat_buf, stat_spare;
  /* Is the right integer expression of the form '-l string'? */
  bool r_is_l;

  if (l_is_l)
    advance (false);
  op = pos + 1;

  if ((op < argc - 2) && STREQ (argv[op + 1], "-l"))
    {
      r_is_l = true;
      advance (false);
    }
  else
    r_is_l = false;

  if (argv[op][0] == '-')
    {
      /* check for eq, nt, and stuff */
      if ((((argv[op][1] == 'l' || argv[op][1] == 'g')
            && (argv[op][2] == 'e' || argv[op][2] == 't'))
           || (argv[op][1] == 'e' && argv[op][2] == 'q')
           || (argv[op][1] == 'n' && argv[op][2] == 'e'))
          && !argv[op][3])
        {
          char lbuf[INT_BUFSIZE_BOUND (uintmax_t)];
          char rbuf[INT_BUFSIZE_BOUND (uintmax_t)];
          char const *l = (l_is_l
                           ? umaxtostr (strlen (argv[op - 1]), lbuf)
                           : find_int (argv[op - 1]));
          char const *r = (r_is_l
                           ? umaxtostr (strlen (argv[op + 2]), rbuf)
                           : find_int (argv[op + 1]));
          int cmp = strintcmp (l, r);
          bool xe_operator = (argv[op][2] == 'e');
          pos += 3;
          return (argv[op][1] == 'l' ? cmp < xe_operator
                  : argv[op][1] == 'g' ? cmp > - xe_operator
                  : (cmp != 0) == xe_operator);
        }

      switch (argv[op][1])
        {
        default:
          break;

        case 'n':
          if (argv[op][2] == 't' && !argv[op][3])
            {
              /* nt - newer than */
              struct timespec lt, rt;
              bool le, re;
              pos += 3;
              if (l_is_l || r_is_l)
                test_syntax_error (_("-nt does not accept -l"), NULL);
              le = get_mtime (argv[op - 1], &lt);
              re = get_mtime (argv[op + 1], &rt);
              return le && (!re || timespec_cmp (lt, rt) > 0);
            }
          break;

        case 'e':
          if (argv[op][2] == 'f' && !argv[op][3])
            {
              /* ef - hard link? */
              pos += 3;
              if (l_is_l || r_is_l)
                test_syntax_error (_("-ef does not accept -l"), NULL);
              return (stat (argv[op - 1], &stat_buf) == 0
                      && stat (argv[op + 1], &stat_spare) == 0
                      && stat_buf.st_dev == stat_spare.st_dev
                      && stat_buf.st_ino == stat_spare.st_ino);
            }
          break;

        case 'o':
          if ('t' == argv[op][2] && '\000' == argv[op][3])
            {
              /* ot - older than */
              struct timespec lt, rt;
              bool le, re;
              pos += 3;
              if (l_is_l || r_is_l)
                test_syntax_error (_("-ot does not accept -l"), NULL);
              le = get_mtime (argv[op - 1], &lt);
              re = get_mtime (argv[op + 1], &rt);
              return re && (!le || timespec_cmp (lt, rt) < 0);
            }
          break;
        }

      /* FIXME: is this dead code? */
      test_syntax_error (_("%s: unknown binary operator"), quote (argv[op]));
    }

  if (argv[op][0] == '='
      && (!argv[op][1] || ((argv[op][1] == '=') && !argv[op][2])))
    {
      bool value = STREQ (argv[pos], argv[pos + 2]);
      pos += 3;
      return value;
    }

  if (STREQ (argv[op], "!="))
    {
      bool value = !STREQ (argv[pos], argv[pos + 2]);
      pos += 3;
      return value;
    }

  /* Not reached.  */
  abort ();
}

static bool
unary_operator (void)
{
  struct stat stat_buf;

  switch (argv[pos][1])
    {
    default:
      return false;

      /* All of the following unary operators use unary_advance (), which
         checks to make sure that there is an argument, and then advances
         pos right past it.  This means that pos - 1 is the location of the
         argument. */

    case 'a':			/* file exists in the file system? */
    case 'e':
      unary_advance ();
      return stat (argv[pos - 1], &stat_buf) == 0;

    case 'r':			/* file is readable? */
      unary_advance ();
      return euidaccess (argv[pos - 1], R_OK) == 0;

    case 'w':			/* File is writable? */
      unary_advance ();
      return euidaccess (argv[pos - 1], W_OK) == 0;

    case 'x':			/* File is executable? */
      unary_advance ();
      return euidaccess (argv[pos - 1], X_OK) == 0;

    case 'O':			/* File is owned by you? */
      {
        unary_advance ();
        if (stat (argv[pos - 1], &stat_buf) != 0)
          return false;
        errno = 0;
        uid_t euid = geteuid ();
        uid_t NO_UID = -1;
        return ! (euid == NO_UID && errno) && euid == stat_buf.st_uid;
      }

    case 'G':			/* File is owned by your group? */
      {
        unary_advance ();
        if (stat (argv[pos - 1], &stat_buf) != 0)
          return false;
        errno = 0;
        gid_t egid = getegid ();
        gid_t NO_GID = -1;
        return ! (egid == NO_GID && errno) && egid == stat_buf.st_gid;
      }

    case 'f':			/* File is a file? */
      unary_advance ();
      /* Under POSIX, -f is true if the given file exists
         and is a regular file. */
      return (stat (argv[pos - 1], &stat_buf) == 0
              && S_ISREG (stat_buf.st_mode));

    case 'd':			/* File is a directory? */
      unary_advance ();
      return (stat (argv[pos - 1], &stat_buf) == 0
              && S_ISDIR (stat_buf.st_mode));

    case 's':			/* File has something in it? */
      unary_advance ();
      return (stat (argv[pos - 1], &stat_buf) == 0
              && 0 < stat_buf.st_size);

    case 'S':			/* File is a socket? */
      unary_advance ();
      return (stat (argv[pos - 1], &stat_buf) == 0
              && S_ISSOCK (stat_buf.st_mode));

    case 'c':			/* File is character special? */
      unary_advance ();
      return (stat (argv[pos - 1], &stat_buf) == 0
              && S_ISCHR (stat_buf.st_mode));

    case 'b':			/* File is block special? */
      unary_advance ();
      return (stat (argv[pos - 1], &stat_buf) == 0
              && S_ISBLK (stat_buf.st_mode));

    case 'p':			/* File is a named pipe? */
      unary_advance ();
      return (stat (argv[pos - 1], &stat_buf) == 0
              && S_ISFIFO (stat_buf.st_mode));

    case 'L':			/* Same as -h  */
      /*FALLTHROUGH*/

    case 'h':			/* File is a symbolic link? */
      unary_advance ();
      return (lstat (argv[pos - 1], &stat_buf) == 0
              && S_ISLNK (stat_buf.st_mode));

    case 'u':			/* File is setuid? */
      unary_advance ();
      return (stat (argv[pos - 1], &stat_buf) == 0
              && (stat_buf.st_mode & S_ISUID));

    case 'g':			/* File is setgid? */
      unary_advance ();
      return (stat (argv[pos - 1], &stat_buf) == 0
              && (stat_buf.st_mode & S_ISGID));

    case 'k':			/* File has sticky bit set? */
      unary_advance ();
      return (stat (argv[pos - 1], &stat_buf) == 0
              && (stat_buf.st_mode & S_ISVTX));

    case 't':			/* File (fd) is a terminal? */
      {
        long int fd;
        char const *arg;
        unary_advance ();
        arg = find_int (argv[pos - 1]);
        errno = 0;
        fd = strtol (arg, NULL, 10);
        return (errno != ERANGE && 0 <= fd && fd <= INT_MAX && isatty (fd));
      }

    case 'n':			/* True if arg has some length. */
      unary_advance ();
      return argv[pos - 1][0] != 0;

    case 'z':			/* True if arg has no length. */
      unary_advance ();
      return argv[pos - 1][0] == '\0';
    }
}

/*
 * and:
 *	term
 *	term '-a' and
 */
static bool
and (void)
{
  bool value = true;

  while (true)
    {
      value &= term ();
      if (! (pos < argc && STREQ (argv[pos], "-a")))
        return value;
      advance (false);
    }
}

/*
 * or:
 *	and
 *	and '-o' or
 */
static bool
or (void)
{
  bool value = false;

  while (true)
    {
      value |= and ();
      if (! (pos < argc && STREQ (argv[pos], "-o")))
        return value;
      advance (false);
    }
}

/*
 * expr:
 *	or
 */
static bool
expr (void)
{
  if (pos >= argc)
    beyond ();

  return or ();		/* Same with this. */
}

/* Return true if OP is one of the test command's unary operators. */
static bool
test_unop (char const *op)
{
  if (op[0] != '-')
    return false;

  switch (op[1])
    {
    case 'a': case 'b': case 'c': case 'd': case 'e':
    case 'f': case 'g': case 'h': case 'k': case 'n':
    case 'o': case 'p': case 'r': case 's': case 't':
    case 'u': case 'w': case 'x': case 'z':
    case 'G': case 'L': case 'O': case 'S': case 'N':
      return true;
    default:
      return false;
    }
}

static bool
one_argument (void)
{
  return argv[pos++][0] != '\0';
}

static bool
two_arguments (void)
{
  bool value;

  if (STREQ (argv[pos], "!"))
    {
      advance (false);
      value = ! one_argument ();
    }
  else if (argv[pos][0] == '-'
           && argv[pos][1] != '\0'
           && argv[pos][2] == '\0')
    {
      if (test_unop (argv[pos]))
        value = unary_operator ();
      else
        test_syntax_error (_("%s: unary operator expected"), quote (argv[pos]));
    }
  else
    beyond ();
  return (value);
}

static bool
three_arguments (void)
{
  bool value;

  if (binop (argv[pos + 1]))
    value = binary_operator (false);
  else if (STREQ (argv[pos], "!"))
    {
      advance (true);
      value = !two_arguments ();
    }
  else if (STREQ (argv[pos], "(") && STREQ (argv[pos + 2], ")"))
    {
      advance (false);
      value = one_argument ();
      advance (false);
    }
  else if (STREQ (argv[pos + 1], "-a") || STREQ (argv[pos + 1], "-o"))
    value = expr ();
  else
    test_syntax_error (_("%s: binary operator expected"), quote (argv[pos+1]));
  return (value);
}

/* This is an implementation of a Posix.2 proposal by David Korn. */
static bool
posixtest (int nargs)
{
  bool value;

  switch (nargs)
    {
      case 1:
        value = one_argument ();
        break;

      case 2:
        value = two_arguments ();
        break;

      case 3:
        value = three_arguments ();
        break;

      case 4:
        if (STREQ (argv[pos], "!"))
          {
            advance (true);
            value = !three_arguments ();
            break;
          }
        if (STREQ (argv[pos], "(") && STREQ (argv[pos + 3], ")"))
          {
            advance (false);
            value = two_arguments ();
            advance (false);
            break;
          }
        /* FALLTHROUGH */
      case 5:
      default:
        if (nargs <= 0)
          abort ();
        value = expr ();
    }

  return (value);
}

#if defined TEST_STANDALONE

void
usage (int status)
{
  if (status != EXIT_SUCCESS)
    emit_try_help ();
  else
    {
      fputs (_("\
Usage: test EXPRESSION\n\
  or:  test\n\
  or:  [ EXPRESSION ]\n\
  or:  [ ]\n\
  or:  [ OPTION\n\
"), stdout);
      fputs (_("\
Exit with the status determined by EXPRESSION.\n\
\n\
"), stdout);
      fputs (HELP_OPTION_DESCRIPTION, stdout);
      fputs (VERSION_OPTION_DESCRIPTION, stdout);
      fputs (_("\
\n\
An omitted EXPRESSION defaults to false.  Otherwise,\n\
EXPRESSION is true or false and sets exit status.  It is one of:\n\
"), stdout);
      fputs (_("\
\n\
  ( EXPRESSION )               EXPRESSION is true\n\
  ! EXPRESSION                 EXPRESSION is false\n\
  EXPRESSION1 -a EXPRESSION2   both EXPRESSION1 and EXPRESSION2 are true\n\
  EXPRESSION1 -o EXPRESSION2   either EXPRESSION1 or EXPRESSION2 is true\n\
"), stdout);
      fputs (_("\
\n\
  -n STRING            the length of STRING is nonzero\n\
  STRING               equivalent to -n STRING\n\
  -z STRING            the length of STRING is zero\n\
  STRING1 = STRING2    the strings are equal\n\
  STRING1 != STRING2   the strings are not equal\n\
"), stdout);
      fputs (_("\
\n\
  INTEGER1 -eq INTEGER2   INTEGER1 is equal to INTEGER2\n\
  INTEGER1 -ge INTEGER2   INTEGER1 is greater than or equal to INTEGER2\n\
  INTEGER1 -gt INTEGER2   INTEGER1 is greater than INTEGER2\n\
  INTEGER1 -le INTEGER2   INTEGER1 is less than or equal to INTEGER2\n\
  INTEGER1 -lt INTEGER2   INTEGER1 is less than INTEGER2\n\
  INTEGER1 -ne INTEGER2   INTEGER1 is not equal to INTEGER2\n\
"), stdout);
      fputs (_("\
\n\
  FILE1 -ef FILE2   FILE1 and FILE2 have the same device and inode numbers\n\
  FILE1 -nt FILE2   FILE1 is newer (modification date) than FILE2\n\
  FILE1 -ot FILE2   FILE1 is older than FILE2\n\
"), stdout);
      fputs (_("\
\n\
  -b FILE     FILE exists and is block special\n\
  -c FILE     FILE exists and is character special\n\
  -d FILE     FILE exists and is a directory\n\
  -e FILE     FILE exists\n\
"), stdout);
      fputs (_("\
  -f FILE     FILE exists and is a regular file\n\
  -g FILE     FILE exists and is set-group-ID\n\
  -G FILE     FILE exists and is owned by the effective group ID\n\
  -h FILE     FILE exists and is a symbolic link (same as -L)\n\
  -k FILE     FILE exists and has its sticky bit set\n\
"), stdout);
      fputs (_("\
  -L FILE     FILE exists and is a symbolic link (same as -h)\n\
  -O FILE     FILE exists and is owned by the effective user ID\n\
  -p FILE     FILE exists and is a named pipe\n\
  -r FILE     FILE exists and read permission is granted\n\
  -s FILE     FILE exists and has a size greater than zero\n\
"), stdout);
      fputs (_("\
  -S FILE     FILE exists and is a socket\n\
  -t FD       file descriptor FD is opened on a terminal\n\
  -u FILE     FILE exists and its set-user-ID bit is set\n\
  -w FILE     FILE exists and write permission is granted\n\
  -x FILE     FILE exists and execute (or search) permission is granted\n\
"), stdout);
      fputs (_("\
\n\
Except for -h and -L, all FILE-related tests dereference symbolic links.\n\
Beware that parentheses need to be escaped (e.g., by backslashes) for shells.\n\
INTEGER may also be -l STRING, which evaluates to the length of STRING.\n\
"), stdout);
      fputs (_("\
\n\
NOTE: Binary -a and -o are inherently ambiguous.  Use 'test EXPR1 && test\n\
EXPR2' or 'test EXPR1 || test EXPR2' instead.\n\
"), stdout);
      fputs (_("\
\n\
NOTE: [ honors the --help and --version options, but test does not.\n\
test treats each of those as it treats any other nonempty STRING.\n\
"), stdout);
      printf (USAGE_BUILTIN_WARNING, _("test and/or ["));
      emit_ancillary_info (PROGRAM_NAME);
    }
  exit (status);
}
#endif /* TEST_STANDALONE */

#if !defined TEST_STANDALONE
# define main test_command
#endif

#define AUTHORS \
  proper_name ("Kevin Braunsdorf"), \
  proper_name ("Matthew Bradburn")

/*
 * [:
 *	'[' expr ']'
 * test:
 *	test expr
 */
int
main (int margc, char **margv)
{
  bool value;

#if !defined TEST_STANDALONE
  int code;

  code = setjmp (test_exit_buf);

  if (code)
    return (test_error_return);
#else /* TEST_STANDALONE */
  initialize_main (&margc, &margv);
  set_program_name (margv[0]);
  setlocale (LC_ALL, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  initialize_exit_failure (TEST_FAILURE);
  atexit (close_stdout);
#endif /* TEST_STANDALONE */

  argv = margv;

  if (LBRACKET)
    {
      /* Recognize --help or --version, but only when invoked in the
         "[" form, when the last argument is not "]".  Use direct
         parsing, rather than parse_long_options, to avoid accepting
         abbreviations.  POSIX allows "[ --help" and "[ --version" to
         have the usual GNU behavior, but it requires "test --help"
         and "test --version" to exit silently with status 0.  */
      if (margc == 2)
        {
          if (STREQ (margv[1], "--help"))
            usage (EXIT_SUCCESS);

          if (STREQ (margv[1], "--version"))
            {
              version_etc (stdout, PROGRAM_NAME, PACKAGE_NAME, Version, AUTHORS,
                           (char *) NULL);
              test_main_return (EXIT_SUCCESS);
            }
        }
      if (margc < 2 || !STREQ (margv[margc - 1], "]"))
        test_syntax_error (_("missing %s"), quote ("]"));

      --margc;
    }

  argc = margc;
  pos = 1;

  if (pos >= argc)
    test_main_return (TEST_FALSE);

  value = posixtest (argc - 1);

  if (pos != argc)
    test_syntax_error (_("extra argument %s"), quote (argv[pos]));

  test_main_return (value ? TEST_TRUE : TEST_FALSE);
}