1 /* du -- summarize disk usage
2 Copyright (C) 1988-2013 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Differences from the Unix du:
18 * Doesn't simply ignore the names of regular files given as arguments
21 By tege@sics.se, Torbjorn Granlund,
22 and djm@ai.mit.edu, David MacKenzie.
23 Variable blocks added by lm@sgi.com and eggert@twinsun.com.
24 Rewritten to use nftw, then to use fts by Jim Meyering. */
28 #include <sys/types.h>
32 #include "argv-iter.h"
36 #include "fprintftime.h"
38 #include "mountlist.h"
41 #include "stat-size.h"
42 #include "stat-time.h"
47 extern bool fts_debug;
49 /* The official name of this program (e.g., no 'g' prefix). */
50 #define PROGRAM_NAME "du"
53 proper_name_utf8 ("Torbjorn Granlund", "Torbj\303\266rn Granlund"), \
54 proper_name ("David MacKenzie"), \
55 proper_name ("Paul Eggert"), \
56 proper_name ("Jim Meyering")
59 # define FTS_CROSS_CHECK(Fts) fts_cross_check (Fts)
61 # define FTS_CROSS_CHECK(Fts)
64 /* A set of dev/ino pairs to help identify files and directories
65 whose sizes have already been counted. */
66 static struct di_set *di_files;
68 /* A set containing a dev/ino pair for each local mount point directory. */
69 static struct di_set *di_mnt;
71 /* Keep track of the preceding "level" (depth in hierarchy)
72 from one call of process_file to the next. */
73 static size_t prev_level;
75 /* Define a class for collecting directory information. */
78 /* Size of files in directory. */
81 /* Latest time stamp found. If tmax.tv_sec == TYPE_MINIMUM (time_t)
82 && tmax.tv_nsec < 0, no time stamp has been found. */
86 /* Initialize directory data. */
88 duinfo_init (struct duinfo *a)
91 a->tmax.tv_sec = TYPE_MINIMUM (time_t);
95 /* Set directory data. */
97 duinfo_set (struct duinfo *a, uintmax_t size, struct timespec tmax)
103 /* Accumulate directory data. */
105 duinfo_add (struct duinfo *a, struct duinfo const *b)
107 uintmax_t sum = a->size + b->size;
108 a->size = a->size <= sum ? sum : UINTMAX_MAX;
109 if (timespec_cmp (a->tmax, b->tmax) < 0)
113 /* A structure for per-directory level information. */
116 /* Entries in this directory. */
119 /* Total for subdirectories. */
120 struct duinfo subdir;
123 /* If true, display counts for all files, not just directories. */
124 static bool opt_all = false;
126 /* If true, rather than using the disk usage of each file,
127 use the apparent size (a la stat.st_size). */
128 static bool apparent_size = false;
130 /* If true, count each hard link of files with multiple links. */
131 static bool opt_count_all = false;
133 /* If true, hash all files to look for hard links. */
134 static bool hash_all;
136 /* If true, output the NUL byte instead of a newline at the end of each line. */
137 static bool opt_nul_terminate_output = false;
139 /* If true, print a grand total at the end. */
140 static bool print_grand_total = false;
142 /* If nonzero, do not add sizes of subdirectories. */
143 static bool opt_separate_dirs = false;
145 /* Show the total for each directory (and file if --all) that is at
146 most MAX_DEPTH levels down from the root of the hierarchy. The root
147 is at level 0, so 'du --max-depth=0' is equivalent to 'du -s'. */
148 static size_t max_depth = SIZE_MAX;
150 /* Only output entries with at least this SIZE if positive,
151 or at most if negative. See --threshold option. */
152 static intmax_t opt_threshold = 0;
154 /* Human-readable options for output. */
155 static int human_output_opts;
157 /* If true, print most recently modified date, using the specified format. */
158 static bool opt_time = false;
160 /* Type of time to display. controlled by --time. */
164 time_mtime, /* default */
169 static enum time_type time_type = time_mtime;
171 /* User specified date / time style */
172 static char const *time_style = NULL;
174 /* Format used to display date / time. Controlled by --time-style */
175 static char const *time_format = NULL;
177 /* The units to use when printing sizes. */
178 static uintmax_t output_block_size;
180 /* File name patterns to exclude. */
181 static struct exclude *exclude;
183 /* Grand total size of all args, in bytes. Also latest modified date. */
184 static struct duinfo tot_dui;
186 #define IS_DIR_TYPE(Type) \
188 || (Type) == FTS_DNR)
190 /* For long options that have no equivalent short option, use a
191 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
194 APPARENT_SIZE_OPTION = CHAR_MAX + 1,
203 static struct option const long_options[] =
205 {"all", no_argument, NULL, 'a'},
206 {"apparent-size", no_argument, NULL, APPARENT_SIZE_OPTION},
207 {"block-size", required_argument, NULL, 'B'},
208 {"bytes", no_argument, NULL, 'b'},
209 {"count-links", no_argument, NULL, 'l'},
210 /* {"-debug", no_argument, NULL, FTS_DEBUG}, */
211 {"dereference", no_argument, NULL, 'L'},
212 {"dereference-args", no_argument, NULL, 'D'},
213 {"exclude", required_argument, NULL, EXCLUDE_OPTION},
214 {"exclude-from", required_argument, NULL, 'X'},
215 {"files0-from", required_argument, NULL, FILES0_FROM_OPTION},
216 {"human-readable", no_argument, NULL, 'h'},
217 {"si", no_argument, NULL, HUMAN_SI_OPTION},
218 {"max-depth", required_argument, NULL, 'd'},
219 {"null", no_argument, NULL, '0'},
220 {"no-dereference", no_argument, NULL, 'P'},
221 {"one-file-system", no_argument, NULL, 'x'},
222 {"separate-dirs", no_argument, NULL, 'S'},
223 {"summarize", no_argument, NULL, 's'},
224 {"total", no_argument, NULL, 'c'},
225 {"threshold", required_argument, NULL, 't'},
226 {"time", optional_argument, NULL, TIME_OPTION},
227 {"time-style", required_argument, NULL, TIME_STYLE_OPTION},
228 {GETOPT_HELP_OPTION_DECL},
229 {GETOPT_VERSION_OPTION_DECL},
233 static char const *const time_args[] =
235 "atime", "access", "use", "ctime", "status", NULL
237 static enum time_type const time_types[] =
239 time_atime, time_atime, time_atime, time_ctime, time_ctime
241 ARGMATCH_VERIFY (time_args, time_types);
243 /* 'full-iso' uses full ISO-style dates and times. 'long-iso' uses longer
244 ISO-style time stamps, though shorter than 'full-iso'. 'iso' uses shorter
245 ISO-style time stamps. */
248 full_iso_time_style, /* --time-style=full-iso */
249 long_iso_time_style, /* --time-style=long-iso */
250 iso_time_style /* --time-style=iso */
253 static char const *const time_style_args[] =
255 "full-iso", "long-iso", "iso", NULL
257 static enum time_style const time_style_types[] =
259 full_iso_time_style, long_iso_time_style, iso_time_style
261 ARGMATCH_VERIFY (time_style_args, time_style_types);
266 if (status != EXIT_SUCCESS)
271 Usage: %s [OPTION]... [FILE]...\n\
272 or: %s [OPTION]... --files0-from=F\n\
273 "), program_name, program_name);
275 Summarize disk usage of each FILE, recursively for directories.\n\
279 Mandatory arguments to long options are mandatory for short options too.\n\
282 -a, --all write counts for all files, not just directories\n\
283 --apparent-size print apparent sizes, rather than disk usage; although\
285 the apparent size is usually smaller, it may be\n\
286 larger due to holes in ('sparse') files, internal\n\
287 fragmentation, indirect blocks, and the like\n\
290 -B, --block-size=SIZE scale sizes by SIZE before printing them. E.g.,\n\
291 '-BM' prints sizes in units of 1,048,576 bytes.\n\
292 See SIZE format below.\n\
293 -b, --bytes equivalent to '--apparent-size --block-size=1'\n\
294 -c, --total produce a grand total\n\
295 -D, --dereference-args dereference only symlinks that are listed on the\n\
299 --files0-from=F summarize disk usage of the NUL-terminated file\n\
300 names specified in file F;\n\
301 If F is - then read names from standard input\n\
302 -H equivalent to --dereference-args (-D)\n\
303 -h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G)\
305 --si like -h, but use powers of 1000 not 1024\n\
308 -k like --block-size=1K\n\
309 -l, --count-links count sizes many times if hard linked\n\
310 -m like --block-size=1M\n\
313 -L, --dereference dereference all symbolic links\n\
314 -P, --no-dereference don't follow any symbolic links (this is the default)\n\
315 -0, --null end each output line with 0 byte rather than newline\n\
316 -S, --separate-dirs do not include size of subdirectories\n\
317 -s, --summarize display only a total for each argument\n\
320 -x, --one-file-system skip directories on different file systems\n\
321 -X, --exclude-from=FILE exclude files that match any pattern in FILE\n\
322 --exclude=PATTERN exclude files that match PATTERN\n\
323 -d, --max-depth=N print the total for a directory (or file, with --all)\n\
324 only if it is N or fewer levels below the command\n\
325 line argument; --max-depth=0 is the same as\n\
327 -t, --threshold=SIZE exclude entries smaller than SIZE if positive,\n\
328 or entries greater than SIZE if negative\n\
331 --time show time of the last modification of any file in the\n\
332 directory, or any of its subdirectories\n\
333 --time=WORD show time as WORD instead of modification time:\n\
334 atime, access, use, ctime or status\n\
335 --time-style=STYLE show times using style STYLE:\n\
336 full-iso, long-iso, iso, +FORMAT\n\
337 FORMAT is interpreted like 'date'\n\
339 fputs (HELP_OPTION_DESCRIPTION, stdout);
340 fputs (VERSION_OPTION_DESCRIPTION, stdout);
341 emit_blocksize_note ("DU");
343 emit_ancillary_info ();
348 /* Try to insert the INO/DEV pair into DI_SET.
349 Return true if the pair is successfully inserted,
350 false if the pair was already there. */
352 hash_ins (struct di_set *di_set, ino_t ino, dev_t dev)
354 int inserted = di_set_insert (di_set, dev, ino);
360 /* FIXME: this code is nearly identical to code in date.c */
361 /* Display the date and time in WHEN according to the format specified
365 show_date (const char *format, struct timespec when)
367 struct tm *tm = localtime (&when.tv_sec);
370 char buf[INT_BUFSIZE_BOUND (intmax_t)];
371 char *when_str = timetostr (when.tv_sec, buf);
372 error (0, 0, _("time %s is out of range"), when_str);
373 fputs (when_str, stdout);
377 fprintftime (stdout, format, tm, 0, when.tv_nsec);
380 /* Print N_BYTES. Convert it to a readable value before printing. */
383 print_only_size (uintmax_t n_bytes)
385 char buf[LONGEST_HUMAN_READABLE + 1];
386 fputs ((n_bytes == UINTMAX_MAX
388 : human_readable (n_bytes, buf, human_output_opts,
389 1, output_block_size)),
393 /* Print size (and optionally time) indicated by *PDUI, followed by STRING. */
396 print_size (const struct duinfo *pdui, const char *string)
398 print_only_size (pdui->size);
402 show_date (time_format, pdui->tmax);
404 printf ("\t%s%c", string, opt_nul_terminate_output ? '\0' : '\n');
408 /* This function is called once for every file system object that fts
409 encounters. fts does a depth-first traversal. This function knows
410 that and accumulates per-directory totals based on changes in
411 the depth of the current entry. It returns true on success. */
414 process_file (FTS *fts, FTSENT *ent)
418 struct duinfo dui_to_print;
420 static size_t n_alloc;
421 /* First element of the structure contains:
422 The sum of the st_size values of all entries in the single directory
423 at the corresponding level. Although this does include the st_size
424 corresponding to each subdirectory, it does not include the size of
425 any file in a subdirectory. Also corresponding last modified date.
426 Second element of the structure contains:
427 The sum of the sizes of all entries in the hierarchy at or below the
428 directory at the specified level. */
429 static struct dulevel *dulvl;
431 const char *file = ent->fts_path;
432 const struct stat *sb = ent->fts_statp;
433 int info = ent->fts_info;
437 /* An error occurred, but the size is known, so count it. */
438 error (0, ent->fts_errno, _("cannot read directory %s"), quote (file));
441 else if (info != FTS_DP)
443 bool excluded = excluded_file_name (exclude, file);
446 /* Make the stat buffer *SB valid, or fail noisily. */
448 if (info == FTS_NSOK)
450 fts_set (fts, ent, FTS_AGAIN);
451 FTSENT const *e = fts_read (fts);
453 info = ent->fts_info;
456 if (info == FTS_NS || info == FTS_SLNONE)
458 error (0, ent->fts_errno, _("cannot access %s"), quote (file));
462 /* The --one-file-system (-x) option cannot exclude anything
463 specified on the command-line. By definition, it can exclude
464 a file or directory only when its device number is different
465 from that of its just-processed parent directory, and du does
466 not process the parent of a command-line argument. */
467 if (fts->fts_options & FTS_XDEV
468 && FTS_ROOTLEVEL < ent->fts_level
469 && fts->fts_dev != sb->st_dev)
475 && (hash_all || (! S_ISDIR (sb->st_mode) && 1 < sb->st_nlink))
476 && ! hash_ins (di_files, sb->st_ino, sb->st_dev)))
478 /* If ignoring a directory in preorder, skip its children.
479 Ignore the next fts_read output too, as it's a postorder
480 visit to the same directory. */
483 fts_set (fts, ent, FTS_SKIP);
484 FTSENT const *e = fts_read (fts);
497 /* An error occurred, but the size is known, so count it. */
498 error (0, ent->fts_errno, "%s", quote (file));
503 if (cycle_warning_required (fts, ent))
505 /* If this is a mount point, then diagnose it and avoid
507 if (di_set_lookup (di_mnt, sb->st_dev, sb->st_ino))
508 error (0, 0, _("mount point %s already traversed"),
511 emit_cycle_warning (file);
520 ? MAX (0, sb->st_size)
521 : (uintmax_t) ST_NBLOCKS (*sb) * ST_NBLOCKSIZE),
522 (time_type == time_mtime ? get_stat_mtime (sb)
523 : time_type == time_atime ? get_stat_atime (sb)
524 : get_stat_ctime (sb)));
526 level = ent->fts_level;
531 n_alloc = level + 10;
532 dulvl = xcalloc (n_alloc, sizeof *dulvl);
536 if (level == prev_level)
538 /* This is usually the most common case. Do nothing. */
540 else if (level > prev_level)
542 /* Descending the hierarchy.
543 Clear the accumulators for *all* levels between prev_level
544 and the current one. The depth may change dramatically,
545 e.g., from 1 to 10. */
548 if (n_alloc <= level)
550 dulvl = xnrealloc (dulvl, level, 2 * sizeof *dulvl);
554 for (i = prev_level + 1; i <= level; i++)
556 duinfo_init (&dulvl[i].ent);
557 duinfo_init (&dulvl[i].subdir);
560 else /* level < prev_level */
562 /* Ascending the hierarchy.
563 Process a directory only after all entries in that
564 directory have been processed. When the depth decreases,
565 propagate sums from the children (prev_level) to the parent.
566 Here, the current level is always one smaller than the
568 assert (level == prev_level - 1);
569 duinfo_add (&dui_to_print, &dulvl[prev_level].ent);
570 if (!opt_separate_dirs)
571 duinfo_add (&dui_to_print, &dulvl[prev_level].subdir);
572 duinfo_add (&dulvl[level].subdir, &dulvl[prev_level].ent);
573 duinfo_add (&dulvl[level].subdir, &dulvl[prev_level].subdir);
579 /* Let the size of a directory entry contribute to the total for the
580 containing directory, unless --separate-dirs (-S) is specified. */
581 if (! (opt_separate_dirs && IS_DIR_TYPE (info)))
582 duinfo_add (&dulvl[level].ent, &dui);
584 /* Even if this directory is unreadable or we can't chdir into it,
585 do let its size contribute to the total. */
586 duinfo_add (&tot_dui, &dui);
588 if ((IS_DIR_TYPE (info) && level <= max_depth)
589 || (opt_all && level <= max_depth)
592 /* Print or elide this entry according to the --threshold option. */
593 if (opt_threshold < 0
594 ? dui_to_print.size <= -opt_threshold
595 : dui_to_print.size >= opt_threshold)
596 print_size (&dui_to_print, file);
602 /* Recursively print the sizes of the directories (and, if selected, files)
603 named in FILES, the last entry of which is NULL.
604 BIT_FLAGS controls how fts works.
605 Return true if successful. */
608 du_files (char **files, int bit_flags)
614 FTS *fts = xfts_open (files, bit_flags, NULL);
620 ent = fts_read (fts);
625 error (0, errno, _("fts_read failed: %s"),
626 quotearg_colon (fts->fts_path));
630 /* When exiting this loop early, be careful to reset the
631 global, prev_level, used in process_file. Otherwise, its
632 (level == prev_level - 1) assertion could fail. */
636 FTS_CROSS_CHECK (fts);
638 ok &= process_file (fts, ent);
641 if (fts_close (fts) != 0)
643 error (0, errno, _("fts_close failed"));
651 /* Fill the di_mnt set with local mount point dev/ino pairs. */
654 fill_mount_table (void)
656 struct mount_entry *mnt_ent = read_file_system_list (false);
659 struct mount_entry *mnt_free;
660 if (!mnt_ent->me_remote && !mnt_ent->me_dummy)
663 if (!stat (mnt_ent->me_mountdir, &buf))
664 hash_ins (di_mnt, buf.st_ino, buf.st_dev);
667 /* Ignore stat failure. False positives are too common.
668 E.g., "Permission denied" on /run/user/<name>/gvfs. */
673 mnt_ent = mnt_ent->me_next;
675 free (mnt_free->me_devname);
676 free (mnt_free->me_mountdir);
677 if (mnt_free->me_type_malloced)
678 free (mnt_free->me_type);
684 main (int argc, char **argv)
687 bool max_depth_specified = false;
689 char *files_from = NULL;
691 /* Bit flags that control how fts works. */
692 int bit_flags = FTS_NOSTAT;
694 /* Select one of the three FTS_ options that control if/when
695 to follow a symlink. */
696 int symlink_deref_bits = FTS_PHYSICAL;
698 /* If true, display only a total for each argument. */
699 bool opt_summarize_only = false;
701 cwd_only[0] = bad_cast (".");
704 initialize_main (&argc, &argv);
705 set_program_name (argv[0]);
706 setlocale (LC_ALL, "");
707 bindtextdomain (PACKAGE, LOCALEDIR);
708 textdomain (PACKAGE);
710 atexit (close_stdout);
712 exclude = new_exclude ();
714 human_options (getenv ("DU_BLOCK_SIZE"),
715 &human_output_opts, &output_block_size);
720 int c = getopt_long (argc, argv, "0abd:chHklmst:xB:DLPSX:",
734 opt_nul_terminate_output = true;
741 case APPARENT_SIZE_OPTION:
742 apparent_size = true;
746 apparent_size = true;
747 human_output_opts = 0;
748 output_block_size = 1;
752 print_grand_total = true;
756 human_output_opts = human_autoscale | human_SI | human_base_1024;
757 output_block_size = 1;
760 case HUMAN_SI_OPTION:
761 human_output_opts = human_autoscale | human_SI;
762 output_block_size = 1;
766 human_output_opts = 0;
767 output_block_size = 1024;
770 case 'd': /* --max-depth=N */
772 unsigned long int tmp_ulong;
773 if (xstrtoul (optarg, NULL, 0, &tmp_ulong, NULL) == LONGINT_OK
774 && tmp_ulong <= SIZE_MAX)
776 max_depth_specified = true;
777 max_depth = tmp_ulong;
781 error (0, 0, _("invalid maximum depth %s"),
789 human_output_opts = 0;
790 output_block_size = 1024 * 1024;
794 opt_count_all = true;
798 opt_summarize_only = true;
804 e = xstrtoimax (optarg, NULL, 0, &opt_threshold, "kKmMGTPEZY0");
806 xstrtol_fatal (e, oi, c, long_options, optarg);
807 if (opt_threshold == 0 && *optarg == '-')
809 /* Do not allow -0, as this wouldn't make sense anyway. */
810 error (EXIT_FAILURE, 0, _("invalid --threshold argument '-0'"));
816 bit_flags |= FTS_XDEV;
821 enum strtol_error e = human_options (optarg, &human_output_opts,
824 xstrtol_fatal (e, oi, c, long_options, optarg);
828 case 'H': /* NOTE: before 2008-12, -H was equivalent to --si. */
830 symlink_deref_bits = FTS_COMFOLLOW | FTS_PHYSICAL;
833 case 'L': /* --dereference */
834 symlink_deref_bits = FTS_LOGICAL;
837 case 'P': /* --no-dereference */
838 symlink_deref_bits = FTS_PHYSICAL;
842 opt_separate_dirs = true;
846 if (add_exclude_file (add_exclude, exclude, optarg,
847 EXCLUDE_WILDCARDS, '\n'))
849 error (0, errno, "%s", quotearg_colon (optarg));
854 case FILES0_FROM_OPTION:
859 add_exclude (exclude, optarg, EXCLUDE_WILDCARDS);
866 ? XARGMATCH ("--time", optarg, time_args, time_types)
870 case TIME_STYLE_OPTION:
874 case_GETOPT_HELP_CHAR;
876 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
884 usage (EXIT_FAILURE);
886 if (opt_all && opt_summarize_only)
888 error (0, 0, _("cannot both summarize and show all entries"));
889 usage (EXIT_FAILURE);
892 if (opt_summarize_only && max_depth_specified && max_depth == 0)
895 _("warning: summarizing is the same as using --max-depth=0"));
898 if (opt_summarize_only && max_depth_specified && max_depth != 0)
900 unsigned long int d = max_depth;
901 error (0, 0, _("warning: summarizing conflicts with --max-depth=%lu"), d);
902 usage (EXIT_FAILURE);
905 if (opt_summarize_only)
908 /* Process time style if printing last times. */
913 time_style = getenv ("TIME_STYLE");
915 /* Ignore TIMESTYLE="locale", for compatibility with ls. */
916 if (! time_style || STREQ (time_style, "locale"))
917 time_style = "long-iso";
918 else if (*time_style == '+')
920 /* Ignore anything after a newline, for compatibility
922 char *p = strchr (time_style, '\n');
928 /* Ignore "posix-" prefix, for compatibility with ls. */
929 static char const posix_prefix[] = "posix-";
930 while (strncmp (time_style, posix_prefix, sizeof posix_prefix - 1)
932 time_style += sizeof posix_prefix - 1;
936 if (*time_style == '+')
937 time_format = time_style + 1;
940 switch (XARGMATCH ("time style", time_style,
941 time_style_args, time_style_types))
943 case full_iso_time_style:
944 time_format = "%Y-%m-%d %H:%M:%S.%N %z";
947 case long_iso_time_style:
948 time_format = "%Y-%m-%d %H:%M";
952 time_format = "%Y-%m-%d";
958 struct argv_iterator *ai;
961 /* When using --files0-from=F, you may not specify any files
962 on the command-line. */
965 error (0, 0, _("extra operand %s"), quote (argv[optind]));
966 fprintf (stderr, "%s\n",
967 _("file operands cannot be combined with --files0-from"));
968 usage (EXIT_FAILURE);
971 if (! (STREQ (files_from, "-") || freopen (files_from, "r", stdin)))
972 error (EXIT_FAILURE, errno, _("cannot open %s for reading"),
975 ai = argv_iter_init_stream (stdin);
977 /* It's not easy here to count the arguments, so assume the
983 char **files = (optind < argc ? argv + optind : cwd_only);
984 ai = argv_iter_init_argv (files);
986 /* Hash all dev,ino pairs if there are multiple arguments, or if
987 following non-command-line symlinks, because in either case a
988 file with just one hard link might be seen more than once. */
989 hash_all = (optind + 1 < argc || symlink_deref_bits == FTS_LOGICAL);
995 /* Initialize the set of dev,inode pairs. */
997 di_mnt = di_set_alloc ();
1001 fill_mount_table ();
1003 di_files = di_set_alloc ();
1007 /* If not hashing everything, process_file won't find cycles on its
1008 own, so ask fts_read to check for them accurately. */
1009 if (opt_count_all || ! hash_all)
1010 bit_flags |= FTS_TIGHT_CYCLE_CHECK;
1012 bit_flags |= symlink_deref_bits;
1013 static char *temp_argv[] = { NULL, NULL };
1017 bool skip_file = false;
1018 enum argv_iter_err ai_err;
1019 char *file_name = argv_iter (ai, &ai_err);
1025 goto argv_iter_done;
1027 error (0, errno, _("%s: read error"),
1028 quotearg_colon (files_from));
1030 goto argv_iter_done;
1034 assert (!"unexpected error code from argv_iter");
1037 if (files_from && STREQ (files_from, "-") && STREQ (file_name, "-"))
1039 /* Give a better diagnostic in an unusual case:
1040 printf - | du --files0-from=- */
1041 error (0, 0, _("when reading file names from stdin, "
1042 "no file name of %s allowed"),
1047 /* Report and skip any empty file names before invoking fts.
1048 This works around a glitch in fts, which fails immediately
1049 (without looking at the other file names) when given an empty
1053 /* Diagnose a zero-length file name. When it's one
1054 among many, knowing the record number may help.
1055 FIXME: currently print the record number only with
1056 --files0-from=FILE. Maybe do it for argv, too? */
1057 if (files_from == NULL)
1058 error (0, 0, "%s", _("invalid zero-length file name"));
1061 /* Using the standard 'filename:line-number:' prefix here is
1062 not totally appropriate, since NUL is the separator, not NL,
1063 but it might be better than nothing. */
1064 unsigned long int file_number = argv_iter_n_args (ai);
1065 error (0, 0, "%s:%lu: %s", quotearg_colon (files_from),
1066 file_number, _("invalid zero-length file name"));
1075 temp_argv[0] = file_name;
1076 ok &= du_files (temp_argv, bit_flags);
1081 argv_iter_free (ai);
1082 di_set_free (di_files);
1083 di_set_free (di_mnt);
1085 if (files_from && (ferror (stdin) || fclose (stdin) != 0) && ok)
1086 error (EXIT_FAILURE, 0, _("error reading %s"), quote (files_from));
1088 if (print_grand_total)
1089 print_size (&tot_dui, _("total"));
1091 exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);