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
|
/* du -- summarize disk usage
Copyright (C) 1988, 1989, 1990, 1991 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 2, 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Differences from the Unix du:
* Doesn't simply ignore the names of regular files given as arguments
when -a is given.
* Additional options:
-l Count the size of all files, even if they have appeared
already in another hard link.
-x Do not cross file-system boundaries during the recursion.
-c Write a grand total of all of the arguments after all
arguments have been processed. This can be used to find
out the disk usage of a directory, with some files excluded.
-k Print sizes in kilobytes instead of 512 byte blocks
(the default required by POSIX).
-b Print sizes in bytes.
-S Count the size of each directory separately, not including
the sizes of subdirectories.
-D Dereference only symbolic links given on the command line.
-L Dereference all symbolic links.
By tege@sics.se, Torbjorn Granlund,
and djm@ai.mit.edu, David MacKenzie. */
#ifdef _AIX
#pragma alloca
#endif
#ifdef HAVE_CONFIG_H
#if defined (CONFIG_BROKETS)
/* We use <config.h> instead of "config.h" so that a compilation
using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
(which it would do because it found this file in $srcdir). */
#include <config.h>
#else
#include "config.h"
#endif
#endif
#include <stdio.h>
#include <getopt.h>
#include <sys/types.h>
#include "system.h"
#include "version.h"
int lstat ();
int stat ();
/* Initial number of entries in each hash table entry's table of inodes. */
#define INITIAL_HASH_MODULE 100
/* Initial number of entries in the inode hash table. */
#define INITIAL_ENTRY_TAB_SIZE 70
/* Initial size to allocate for `path'. */
#define INITIAL_PATH_SIZE 100
/* Hash structure for inode and device numbers. The separate entry
structure makes it easier to rehash "in place". */
struct entry
{
ino_t ino;
dev_t dev;
struct entry *coll_link;
};
/* Structure for a hash table for inode numbers. */
struct htab
{
unsigned modulus; /* Size of the `hash' pointer vector. */
struct entry *entry_tab; /* Pointer to dynamically growing vector. */
unsigned entry_tab_size; /* Size of current `entry_tab' allocation. */
unsigned first_free_entry; /* Index in `entry_tab'. */
struct entry *hash[1]; /* Vector of pointers in `entry_tab'. */
};
/* Structure for dynamically resizable strings. */
typedef struct
{
unsigned alloc; /* Size of allocation for the text. */
unsigned length; /* Length of the text currently. */
char *text; /* Pointer to the text. */
} *string, stringstruct;
char *savedir ();
char *xgetcwd ();
char *xmalloc ();
char *xrealloc ();
void error ();
static int hash_insert ();
static int hash_insert2 ();
static long count_entry ();
static void du_files ();
static void hash_init ();
static void hash_reset ();
static void str_concatc ();
static void str_copyc ();
static void str_init ();
static void str_trunc ();
/* Name under which this program was invoked. */
char *program_name;
/* If nonzero, display only a total for each argument. */
static int opt_summarize_only = 0;
/* If nonzero, display counts for all files, not just directories. */
static int opt_all = 0;
/* If nonzero, count each hard link of files with multiple links. */
static int opt_count_all = 0;
/* If nonzero, do not cross file-system boundaries. */
static int opt_one_file_system = 0;
/* If nonzero, print a grand total at the end. */
static int opt_combined_arguments = 0;
/* If nonzero, do not add sizes of subdirectories. */
static int opt_separate_dirs = 0;
/* If nonzero, dereference symlinks that are command line arguments. */
static int opt_dereference_arguments = 0;
enum output_size
{
size_blocks, /* 512-byte blocks. */
size_kilobytes, /* 1K blocks. */
size_bytes /* 1-byte blocks. */
};
/* The units to count in. */
static enum output_size output_size;
/* Accumulated path for file or directory being processed. */
static string path;
/* Pointer to hash structure, used by the hash routines. */
static struct htab *htab;
/* Globally used stat buffer. */
static struct stat stat_buf;
/* A pointer to either lstat or stat, depending on whether
dereferencing of all symbolic links is to be done. */
static int (*xstat) ();
/* The exit status to use if we don't get any fatal errors. */
static int exit_status;
/* If non-zero, display usage information and exit. */
static int show_help;
/* If non-zero, print the version on standard output and exit. */
static int show_version;
static struct option const long_options[] =
{
{"all", no_argument, &opt_all, 1},
{"bytes", no_argument, NULL, 'b'},
{"count-links", no_argument, &opt_count_all, 1},
{"dereference", no_argument, NULL, 'L'},
{"dereference-args", no_argument, &opt_dereference_arguments, 1},
{"kilobytes", no_argument, NULL, 'k'},
{"one-file-system", no_argument, &opt_one_file_system, 1},
{"separate-dirs", no_argument, &opt_separate_dirs, 1},
{"summarize", no_argument, &opt_summarize_only, 1},
{"total", no_argument, &opt_combined_arguments, 1},
{"help", no_argument, &show_help, 1},
{"version", no_argument, &show_version, 1},
{NULL, 0, NULL, 0}
};
static void
usage (reason, status)
char *reason;
int status;
{
if (reason != NULL)
fprintf (status == 0 ? stdout : stderr, "%s: %s\n",
program_name, reason);
fprintf (status == 0 ? stdout : stderr, "\
Usage: %s [OPTION]... [PATH]...\n\
",
program_name);
if (status == 0)
printf ("\
-a, --all write counts for all files, not just directories\n\
-b, --bytes print size in bytes\n\
-c, --total produce a grand total\n\
-k, --kilobytes use 1024 blocks, not 512 despite POSIXLY_CORRECT\n\
-l, --count-links count sizes many times if hard linked\n\
-s, --summarize display only a total for each argument\n\
-x, --one-file-system skip directories on different filesystems\n\
-D, --dereference-args dereference PATHs when symbolic link\n\
-L, --dereference dereference all symbolic links\n\
-S, --separate-dirs do not include size of subdirectories\n\
--help display this help and exit\n\
--version output version information and exit\n");
else
fprintf (stderr, "Try `%s --help' for more information.\n",
program_name);
exit (status);
}
void
main (argc, argv)
int argc;
char *argv[];
{
int c;
program_name = argv[0];
xstat = lstat;
output_size = getenv ("POSIXLY_CORRECT") ? size_blocks : size_kilobytes;
while ((c = getopt_long (argc, argv, "abcklsxDLS", long_options, (int *) 0))
!= EOF)
{
switch (c)
{
case 0: /* Long option. */
break;
case 'a':
opt_all = 1;
break;
case 'b':
output_size = size_bytes;
break;
case 'c':
opt_combined_arguments = 1;
break;
case 'k':
output_size = size_kilobytes;
break;
case 'l':
opt_count_all = 1;
break;
case 's':
opt_summarize_only = 1;
break;
case 'x':
opt_one_file_system = 1;
break;
case 'D':
opt_dereference_arguments = 1;
break;
case 'L':
xstat = stat;
break;
case 'S':
opt_separate_dirs = 1;
break;
default:
usage ((char *) 0, 2);
}
}
if (show_version)
{
printf ("%s\n", version_string);
exit (0);
}
if (show_help)
usage (NULL, 0);
if (opt_all && opt_summarize_only)
usage ("cannot both summarize and show all entries", 2);
/* Initialize the hash structure for inode numbers. */
hash_init (INITIAL_HASH_MODULE, INITIAL_ENTRY_TAB_SIZE);
str_init (&path, INITIAL_PATH_SIZE);
if (optind == argc)
{
str_copyc (path, ".");
/* Initialize the hash structure for inode numbers. */
hash_reset ();
/* Get the size of the current directory only. */
count_entry (".", 1, 0);
}
else
{
du_files (argv + optind);
}
exit (exit_status);
}
/* Recursively print the sizes of the directories (and, if selected, files)
named in FILES, the last entry of which is NULL. */
static void
du_files (files)
char **files;
{
char *wd;
ino_t initial_ino; /* Initial directory's inode. */
dev_t initial_dev; /* Initial directory's device. */
long tot_size = 0L; /* Grand total size of all args. */
int i; /* Index in FILES. */
wd = xgetcwd ();
if (wd == NULL)
error (1, errno, "cannot get current directory");
/* Remember the inode and device number of the current directory. */
if (stat (".", &stat_buf))
error (1, errno, "current directory");
initial_ino = stat_buf.st_ino;
initial_dev = stat_buf.st_dev;
for (i = 0; files[i]; i++)
{
char *arg;
int s;
arg = files[i];
/* Delete final slash in the argument, unless the slash is alone. */
s = strlen (arg) - 1;
if (s != 0)
{
if (arg[s] == '/')
arg[s] = 0;
str_copyc (path, arg);
}
else if (arg[0] == '/')
str_trunc (path, 0); /* Null path for root directory. */
else
str_copyc (path, arg);
if (!opt_combined_arguments)
hash_reset ();
tot_size += count_entry (arg, 1, 0);
/* chdir if `count_entry' has changed the working directory. */
if (stat (".", &stat_buf))
error (1, errno, ".");
if ((stat_buf.st_ino != initial_ino || stat_buf.st_dev != initial_dev)
&& chdir (wd) < 0)
error (1, errno, "cannot change to directory %s", wd);
}
if (opt_combined_arguments)
{
printf ("%ld\ttotal\n", output_size == size_bytes ? tot_size
: convert_blocks (tot_size, output_size == size_kilobytes));
fflush (stdout);
}
free (wd);
}
/* Print (if appropriate) and return the size
(in units determined by `output_size') of file or directory ENT.
TOP is one for external calls, zero for recursive calls.
LAST_DEV is the device that the parent directory of ENT is on. */
static long
count_entry (ent, top, last_dev)
char *ent;
int top;
dev_t last_dev;
{
long size;
if ((top && opt_dereference_arguments ?
stat (ent, &stat_buf) :
(*xstat) (ent, &stat_buf)) < 0)
{
error (0, errno, "%s", path->text);
exit_status = 1;
return 0;
}
if (!opt_count_all
&& stat_buf.st_nlink > 1
&& hash_insert (stat_buf.st_ino, stat_buf.st_dev))
return 0; /* Have counted this already. */
if (output_size == size_bytes)
size = stat_buf.st_size;
else
size = ST_NBLOCKS (stat_buf);
if (S_ISDIR (stat_buf.st_mode))
{
unsigned pathlen;
dev_t dir_dev;
char *name_space;
char *namep;
dir_dev = stat_buf.st_dev;
if (opt_one_file_system && !top && last_dev != dir_dev)
return 0; /* Don't enter a new file system. */
if (chdir (ent) < 0)
{
error (0, errno, "cannot change to directory %s", path->text);
exit_status = 1;
return 0;
}
errno = 0;
name_space = savedir (".", stat_buf.st_size);
if (name_space == NULL)
{
if (errno)
{
error (0, errno, "%s", path->text);
if (chdir ("..") < 0) /* Try to return to previous dir. */
error (1, errno, "cannot change to `..' from directory %s",
path->text);
exit_status = 1;
return 0;
}
else
error (1, 0, "virtual memory exhausted");
}
/* Remember the current path. */
str_concatc (path, "/");
pathlen = path->length;
namep = name_space;
while (*namep != 0)
{
str_concatc (path, namep);
size += count_entry (namep, 0, dir_dev);
str_trunc (path, pathlen);
namep += strlen (namep) + 1;
}
free (name_space);
if (chdir ("..") < 0)
error (1, errno, "cannot change to `..' from directory %s", path->text);
str_trunc (path, pathlen - 1); /* Remove the "/" we added. */
if (!opt_summarize_only || top)
{
printf ("%ld\t%s\n", output_size == size_bytes ? size
: convert_blocks (size, output_size == size_kilobytes),
path->text);
fflush (stdout);
}
return opt_separate_dirs ? 0 : size;
}
else if (opt_all || top)
{
printf ("%ld\t%s\n", output_size == size_bytes ? size
: convert_blocks (size, output_size == size_kilobytes),
path->text);
fflush (stdout);
}
return size;
}
/* Allocate space for the hash structures, and set the global
variable `htab' to point to it. The initial hash module is specified in
MODULUS, and the number of entries are specified in ENTRY_TAB_SIZE. (The
hash structure will be rebuilt when ENTRY_TAB_SIZE entries have been
inserted, and MODULUS and ENTRY_TAB_SIZE in the global `htab' will be
doubled.) */
static void
hash_init (modulus, entry_tab_size)
unsigned modulus;
unsigned entry_tab_size;
{
struct htab *htab_r;
htab_r = (struct htab *)
xmalloc (sizeof (struct htab) + sizeof (struct entry *) * modulus);
htab_r->entry_tab = (struct entry *)
xmalloc (sizeof (struct entry) * entry_tab_size);
htab_r->modulus = modulus;
htab_r->entry_tab_size = entry_tab_size;
htab = htab_r;
hash_reset ();
}
/* Reset the hash structure in the global variable `htab' to
contain no entries. */
static void
hash_reset ()
{
int i;
struct entry **p;
htab->first_free_entry = 0;
p = htab->hash;
for (i = htab->modulus; i > 0; i--)
*p++ = NULL;
}
/* Insert an item (inode INO and device DEV) in the hash
structure in the global variable `htab', if an entry with the same data
was not found already. Return zero if the item was inserted and non-zero
if it wasn't. */
static int
hash_insert (ino, dev)
ino_t ino;
dev_t dev;
{
struct htab *htab_r = htab; /* Initially a copy of the global `htab'. */
if (htab_r->first_free_entry >= htab_r->entry_tab_size)
{
int i;
struct entry *ep;
unsigned modulus;
unsigned entry_tab_size;
/* Increase the number of hash entries, and re-hash the data.
The method of shrimping and increasing is made to compactify
the heap. If twice as much data would be allocated
straightforwardly, we would never re-use a byte of memory. */
/* Let `htab' shrimp. Keep only the header, not the pointer vector. */
htab_r = (struct htab *)
xrealloc ((char *) htab_r, sizeof (struct htab));
modulus = 2 * htab_r->modulus;
entry_tab_size = 2 * htab_r->entry_tab_size;
/* Increase the number of possible entries. */
htab_r->entry_tab = (struct entry *)
xrealloc ((char *) htab_r->entry_tab,
sizeof (struct entry) * entry_tab_size);
/* Increase the size of htab again. */
htab_r = (struct htab *)
xrealloc ((char *) htab_r,
sizeof (struct htab) + sizeof (struct entry *) * modulus);
htab_r->modulus = modulus;
htab_r->entry_tab_size = entry_tab_size;
htab = htab_r;
i = htab_r->first_free_entry;
/* Make the increased hash table empty. The entries are still
available in htab->entry_tab. */
hash_reset ();
/* Go through the entries and install them in the pointer vector
htab->hash. The items are actually inserted in htab->entry_tab at
the position where they already are. The htab->coll_link need
however be updated. Could be made a little more efficient. */
for (ep = htab_r->entry_tab; i > 0; i--)
{
hash_insert2 (htab_r, ep->ino, ep->dev);
ep++;
}
}
return hash_insert2 (htab_r, ino, dev);
}
/* Insert INO and DEV in the hash structure HTAB, if not
already present. Return zero if inserted and non-zero if it
already existed. */
static int
hash_insert2 (htab, ino, dev)
struct htab *htab;
ino_t ino;
dev_t dev;
{
struct entry **hp, *ep2, *ep;
hp = &htab->hash[ino % htab->modulus];
ep2 = *hp;
/* Collision? */
if (ep2 != NULL)
{
ep = ep2;
/* Search for an entry with the same data. */
do
{
if (ep->ino == ino && ep->dev == dev)
return 1; /* Found an entry with the same data. */
ep = ep->coll_link;
}
while (ep != NULL);
/* Did not find it. */
}
ep = *hp = &htab->entry_tab[htab->first_free_entry++];
ep->ino = ino;
ep->dev = dev;
ep->coll_link = ep2; /* `ep2' is NULL if no collision. */
return 0;
}
/* Initialize the struct string S1 for holding SIZE characters. */
static void
str_init (s1, size)
string *s1;
unsigned size;
{
string s;
s = (string) xmalloc (sizeof (stringstruct));
s->text = xmalloc (size + 1);
s->alloc = size;
*s1 = s;
}
static void
ensure_space (s, size)
string s;
unsigned size;
{
if (s->alloc < size)
{
s->text = xrealloc (s->text, size + 1);
s->alloc = size;
}
}
/* Assign the null-terminated C-string CSTR to S1. */
static void
str_copyc (s1, cstr)
string s1;
char *cstr;
{
unsigned l = strlen (cstr);
ensure_space (s1, l);
strcpy (s1->text, cstr);
s1->length = l;
}
static void
str_concatc (s1, cstr)
string s1;
char *cstr;
{
unsigned l1 = s1->length;
unsigned l2 = strlen (cstr);
unsigned l = l1 + l2;
ensure_space (s1, l);
strcpy (s1->text + l1, cstr);
s1->length = l;
}
/* Truncate the string S1 to have length LENGTH. */
static void
str_trunc (s1, length)
string s1;
unsigned length;
{
if (s1->length > length)
{
s1->text[length] = 0;
s1->length = length;
}
}
|