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 /* Number of inodes in directory. */
84 /* Latest time stamp found. If tmax.tv_sec == TYPE_MINIMUM (time_t)
85 && tmax.tv_nsec < 0, no time stamp has been found. */
89 /* Initialize directory data. */
91 duinfo_init (struct duinfo
*a
)
95 a
->tmax
.tv_sec
= TYPE_MINIMUM (time_t);
99 /* Set directory data. */
101 duinfo_set (struct duinfo
*a
, uintmax_t size
, struct timespec tmax
)
108 /* Accumulate directory data. */
110 duinfo_add (struct duinfo
*a
, struct duinfo
const *b
)
112 uintmax_t sum
= a
->size
+ b
->size
;
113 a
->size
= a
->size
<= sum
? sum
: UINTMAX_MAX
;
114 a
->inodes
= a
->inodes
+ b
->inodes
;
115 if (timespec_cmp (a
->tmax
, b
->tmax
) < 0)
119 /* A structure for per-directory level information. */
122 /* Entries in this directory. */
125 /* Total for subdirectories. */
126 struct duinfo subdir
;
129 /* If true, display counts for all files, not just directories. */
130 static bool opt_all
= false;
132 /* If true, rather than using the disk usage of each file,
133 use the apparent size (a la stat.st_size). */
134 static bool apparent_size
= false;
136 /* If true, count each hard link of files with multiple links. */
137 static bool opt_count_all
= false;
139 /* If true, hash all files to look for hard links. */
140 static bool hash_all
;
142 /* If true, output the NUL byte instead of a newline at the end of each line. */
143 static bool opt_nul_terminate_output
= false;
145 /* If true, print a grand total at the end. */
146 static bool print_grand_total
= false;
148 /* If nonzero, do not add sizes of subdirectories. */
149 static bool opt_separate_dirs
= false;
151 /* Show the total for each directory (and file if --all) that is at
152 most MAX_DEPTH levels down from the root of the hierarchy. The root
153 is at level 0, so 'du --max-depth=0' is equivalent to 'du -s'. */
154 static size_t max_depth
= SIZE_MAX
;
156 /* Only output entries with at least this SIZE if positive,
157 or at most if negative. See --threshold option. */
158 static intmax_t opt_threshold
= 0;
160 /* Human-readable options for output. */
161 static int human_output_opts
;
163 /* Output inodes count instead of blocks used. */
164 static bool opt_inodes
= false;
166 /* If true, print most recently modified date, using the specified format. */
167 static bool opt_time
= false;
169 /* Type of time to display. controlled by --time. */
173 time_mtime
, /* default */
178 static enum time_type time_type
= time_mtime
;
180 /* User specified date / time style */
181 static char const *time_style
= NULL
;
183 /* Format used to display date / time. Controlled by --time-style */
184 static char const *time_format
= NULL
;
186 /* The units to use when printing sizes. */
187 static uintmax_t output_block_size
;
189 /* File name patterns to exclude. */
190 static struct exclude
*exclude
;
192 /* Grand total size of all args, in bytes. Also latest modified date. */
193 static struct duinfo tot_dui
;
195 #define IS_DIR_TYPE(Type) \
197 || (Type) == FTS_DNR)
199 /* For long options that have no equivalent short option, use a
200 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
203 APPARENT_SIZE_OPTION
= CHAR_MAX
+ 1,
213 static struct option
const long_options
[] =
215 {"all", no_argument
, NULL
, 'a'},
216 {"apparent-size", no_argument
, NULL
, APPARENT_SIZE_OPTION
},
217 {"block-size", required_argument
, NULL
, 'B'},
218 {"bytes", no_argument
, NULL
, 'b'},
219 {"count-links", no_argument
, NULL
, 'l'},
220 /* {"-debug", no_argument, NULL, FTS_DEBUG}, */
221 {"dereference", no_argument
, NULL
, 'L'},
222 {"dereference-args", no_argument
, NULL
, 'D'},
223 {"exclude", required_argument
, NULL
, EXCLUDE_OPTION
},
224 {"exclude-from", required_argument
, NULL
, 'X'},
225 {"files0-from", required_argument
, NULL
, FILES0_FROM_OPTION
},
226 {"human-readable", no_argument
, NULL
, 'h'},
227 {"inodes", no_argument
, NULL
, INODES_OPTION
},
228 {"si", no_argument
, NULL
, HUMAN_SI_OPTION
},
229 {"max-depth", required_argument
, NULL
, 'd'},
230 {"null", no_argument
, NULL
, '0'},
231 {"no-dereference", no_argument
, NULL
, 'P'},
232 {"one-file-system", no_argument
, NULL
, 'x'},
233 {"separate-dirs", no_argument
, NULL
, 'S'},
234 {"summarize", no_argument
, NULL
, 's'},
235 {"total", no_argument
, NULL
, 'c'},
236 {"threshold", required_argument
, NULL
, 't'},
237 {"time", optional_argument
, NULL
, TIME_OPTION
},
238 {"time-style", required_argument
, NULL
, TIME_STYLE_OPTION
},
239 {GETOPT_HELP_OPTION_DECL
},
240 {GETOPT_VERSION_OPTION_DECL
},
244 static char const *const time_args
[] =
246 "atime", "access", "use", "ctime", "status", NULL
248 static enum time_type
const time_types
[] =
250 time_atime
, time_atime
, time_atime
, time_ctime
, time_ctime
252 ARGMATCH_VERIFY (time_args
, time_types
);
254 /* 'full-iso' uses full ISO-style dates and times. 'long-iso' uses longer
255 ISO-style time stamps, though shorter than 'full-iso'. 'iso' uses shorter
256 ISO-style time stamps. */
259 full_iso_time_style
, /* --time-style=full-iso */
260 long_iso_time_style
, /* --time-style=long-iso */
261 iso_time_style
/* --time-style=iso */
264 static char const *const time_style_args
[] =
266 "full-iso", "long-iso", "iso", NULL
268 static enum time_style
const time_style_types
[] =
270 full_iso_time_style
, long_iso_time_style
, iso_time_style
272 ARGMATCH_VERIFY (time_style_args
, time_style_types
);
277 if (status
!= EXIT_SUCCESS
)
282 Usage: %s [OPTION]... [FILE]...\n\
283 or: %s [OPTION]... --files0-from=F\n\
284 "), program_name
, program_name
);
286 Summarize disk usage of each FILE, recursively for directories.\n\
289 emit_mandatory_arg_note ();
292 -0, --null end each output line with 0 byte rather than newline\n\
293 -a, --all write counts for all files, not just directories\n\
294 --apparent-size print apparent sizes, rather than disk usage; although\
296 the apparent size is usually smaller, it may be\n\
297 larger due to holes in ('sparse') files, internal\n\
298 fragmentation, indirect blocks, and the like\n\
301 -B, --block-size=SIZE scale sizes by SIZE before printing them. E.g.,\n\
302 '-BM' prints sizes in units of 1,048,576 bytes.\n\
303 See SIZE format below.\n\
304 -b, --bytes equivalent to '--apparent-size --block-size=1'\n\
305 -c, --total produce a grand total\n\
306 -D, --dereference-args dereference only symlinks that are listed on the\n\
308 -d, --max-depth=N print the total for a directory (or file, with --all)\n\
309 only if it is N or fewer levels below the command\n\
310 line argument; --max-depth=0 is the same as\n\
314 --files0-from=F summarize disk usage of the NUL-terminated file\n\
315 names specified in file F;\n\
316 If F is - then read names from standard input\n\
317 -H equivalent to --dereference-args (-D)\n\
318 -h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G)\
320 --inodes list inode usage information instead of block usage\n\
323 -k like --block-size=1K\n\
324 -L, --dereference dereference all symbolic links\n\
325 -l, --count-links count sizes many times if hard linked\n\
326 -m like --block-size=1M\n\
329 -P, --no-dereference don't follow any symbolic links (this is the default)\n\
330 -S, --separate-dirs for directories do not include size of subdirectories\n\
331 --si like -h, but use powers of 1000 not 1024\n\
332 -s, --summarize display only a total for each argument\n\
335 -t, --threshold=SIZE exclude entries smaller than SIZE if positive,\n\
336 or entries greater than SIZE if negative\n\
337 --time show time of the last modification of any file in the\n\
338 directory, or any of its subdirectories\n\
339 --time=WORD show time as WORD instead of modification time:\n\
340 atime, access, use, ctime or status\n\
341 --time-style=STYLE show times using style STYLE:\n\
342 full-iso, long-iso, iso, +FORMAT\n\
343 FORMAT is interpreted like 'date'\n\
346 -X, --exclude-from=FILE exclude files that match any pattern in FILE\n\
347 --exclude=PATTERN exclude files that match PATTERN\n\
348 -x, --one-file-system skip directories on different file systems\n\
350 fputs (HELP_OPTION_DESCRIPTION
, stdout
);
351 fputs (VERSION_OPTION_DESCRIPTION
, stdout
);
352 emit_blocksize_note ("DU");
354 emit_ancillary_info ();
359 /* Try to insert the INO/DEV pair into DI_SET.
360 Return true if the pair is successfully inserted,
361 false if the pair was already there. */
363 hash_ins (struct di_set
*di_set
, ino_t ino
, dev_t dev
)
365 int inserted
= di_set_insert (di_set
, dev
, ino
);
371 /* FIXME: this code is nearly identical to code in date.c */
372 /* Display the date and time in WHEN according to the format specified
376 show_date (const char *format
, struct timespec when
)
378 struct tm
*tm
= localtime (&when
.tv_sec
);
381 char buf
[INT_BUFSIZE_BOUND (intmax_t)];
382 char *when_str
= timetostr (when
.tv_sec
, buf
);
383 error (0, 0, _("time %s is out of range"), when_str
);
384 fputs (when_str
, stdout
);
388 fprintftime (stdout
, format
, tm
, 0, when
.tv_nsec
);
391 /* Print N_BYTES. Convert it to a readable value before printing. */
394 print_only_size (uintmax_t n_bytes
)
396 char buf
[LONGEST_HUMAN_READABLE
+ 1];
397 fputs ((n_bytes
== UINTMAX_MAX
399 : human_readable (n_bytes
, buf
, human_output_opts
,
400 1, output_block_size
)),
404 /* Print size (and optionally time) indicated by *PDUI, followed by STRING. */
407 print_size (const struct duinfo
*pdui
, const char *string
)
409 print_only_size (opt_inodes
416 show_date (time_format
, pdui
->tmax
);
418 printf ("\t%s%c", string
, opt_nul_terminate_output
? '\0' : '\n');
422 /* This function is called once for every file system object that fts
423 encounters. fts does a depth-first traversal. This function knows
424 that and accumulates per-directory totals based on changes in
425 the depth of the current entry. It returns true on success. */
428 process_file (FTS
*fts
, FTSENT
*ent
)
432 struct duinfo dui_to_print
;
434 static size_t n_alloc
;
435 /* First element of the structure contains:
436 The sum of the st_size values of all entries in the single directory
437 at the corresponding level. Although this does include the st_size
438 corresponding to each subdirectory, it does not include the size of
439 any file in a subdirectory. Also corresponding last modified date.
440 Second element of the structure contains:
441 The sum of the sizes of all entries in the hierarchy at or below the
442 directory at the specified level. */
443 static struct dulevel
*dulvl
;
445 const char *file
= ent
->fts_path
;
446 const struct stat
*sb
= ent
->fts_statp
;
447 int info
= ent
->fts_info
;
451 /* An error occurred, but the size is known, so count it. */
452 error (0, ent
->fts_errno
, _("cannot read directory %s"), quote (file
));
455 else if (info
!= FTS_DP
)
457 bool excluded
= excluded_file_name (exclude
, file
);
460 /* Make the stat buffer *SB valid, or fail noisily. */
462 if (info
== FTS_NSOK
)
464 fts_set (fts
, ent
, FTS_AGAIN
);
465 FTSENT
const *e
= fts_read (fts
);
467 info
= ent
->fts_info
;
470 if (info
== FTS_NS
|| info
== FTS_SLNONE
)
472 error (0, ent
->fts_errno
, _("cannot access %s"), quote (file
));
476 /* The --one-file-system (-x) option cannot exclude anything
477 specified on the command-line. By definition, it can exclude
478 a file or directory only when its device number is different
479 from that of its just-processed parent directory, and du does
480 not process the parent of a command-line argument. */
481 if (fts
->fts_options
& FTS_XDEV
482 && FTS_ROOTLEVEL
< ent
->fts_level
483 && fts
->fts_dev
!= sb
->st_dev
)
489 && (hash_all
|| (! S_ISDIR (sb
->st_mode
) && 1 < sb
->st_nlink
))
490 && ! hash_ins (di_files
, sb
->st_ino
, sb
->st_dev
)))
492 /* If ignoring a directory in preorder, skip its children.
493 Ignore the next fts_read output too, as it's a postorder
494 visit to the same directory. */
497 fts_set (fts
, ent
, FTS_SKIP
);
498 FTSENT
const *e
= fts_read (fts
);
511 /* An error occurred, but the size is known, so count it. */
512 error (0, ent
->fts_errno
, "%s", quote (file
));
517 if (cycle_warning_required (fts
, ent
))
519 /* If this is a mount point, then diagnose it and avoid
521 if (di_set_lookup (di_mnt
, sb
->st_dev
, sb
->st_ino
))
522 error (0, 0, _("mount point %s already traversed"),
525 emit_cycle_warning (file
);
534 ? MAX (0, sb
->st_size
)
535 : (uintmax_t) ST_NBLOCKS (*sb
) * ST_NBLOCKSIZE
),
536 (time_type
== time_mtime
? get_stat_mtime (sb
)
537 : time_type
== time_atime
? get_stat_atime (sb
)
538 : get_stat_ctime (sb
)));
540 level
= ent
->fts_level
;
545 n_alloc
= level
+ 10;
546 dulvl
= xcalloc (n_alloc
, sizeof *dulvl
);
550 if (level
== prev_level
)
552 /* This is usually the most common case. Do nothing. */
554 else if (level
> prev_level
)
556 /* Descending the hierarchy.
557 Clear the accumulators for *all* levels between prev_level
558 and the current one. The depth may change dramatically,
559 e.g., from 1 to 10. */
562 if (n_alloc
<= level
)
564 dulvl
= xnrealloc (dulvl
, level
, 2 * sizeof *dulvl
);
568 for (i
= prev_level
+ 1; i
<= level
; i
++)
570 duinfo_init (&dulvl
[i
].ent
);
571 duinfo_init (&dulvl
[i
].subdir
);
574 else /* level < prev_level */
576 /* Ascending the hierarchy.
577 Process a directory only after all entries in that
578 directory have been processed. When the depth decreases,
579 propagate sums from the children (prev_level) to the parent.
580 Here, the current level is always one smaller than the
582 assert (level
== prev_level
- 1);
583 duinfo_add (&dui_to_print
, &dulvl
[prev_level
].ent
);
584 if (!opt_separate_dirs
)
585 duinfo_add (&dui_to_print
, &dulvl
[prev_level
].subdir
);
586 duinfo_add (&dulvl
[level
].subdir
, &dulvl
[prev_level
].ent
);
587 duinfo_add (&dulvl
[level
].subdir
, &dulvl
[prev_level
].subdir
);
593 /* Let the size of a directory entry contribute to the total for the
594 containing directory, unless --separate-dirs (-S) is specified. */
595 if (! (opt_separate_dirs
&& IS_DIR_TYPE (info
)))
596 duinfo_add (&dulvl
[level
].ent
, &dui
);
598 /* Even if this directory is unreadable or we can't chdir into it,
599 do let its size contribute to the total. */
600 duinfo_add (&tot_dui
, &dui
);
602 if ((IS_DIR_TYPE (info
) && level
<= max_depth
)
603 || (opt_all
&& level
<= max_depth
)
606 /* Print or elide this entry according to the --threshold option. */
607 uintmax_t v
= opt_inodes
? dui_to_print
.inodes
: dui_to_print
.size
;
608 if (opt_threshold
< 0
609 ? v
<= -opt_threshold
610 : v
>= opt_threshold
)
611 print_size (&dui_to_print
, file
);
617 /* Recursively print the sizes of the directories (and, if selected, files)
618 named in FILES, the last entry of which is NULL.
619 BIT_FLAGS controls how fts works.
620 Return true if successful. */
623 du_files (char **files
, int bit_flags
)
629 FTS
*fts
= xfts_open (files
, bit_flags
, NULL
);
635 ent
= fts_read (fts
);
640 error (0, errno
, _("fts_read failed: %s"),
641 quotearg_colon (fts
->fts_path
));
645 /* When exiting this loop early, be careful to reset the
646 global, prev_level, used in process_file. Otherwise, its
647 (level == prev_level - 1) assertion could fail. */
651 FTS_CROSS_CHECK (fts
);
653 ok
&= process_file (fts
, ent
);
656 if (fts_close (fts
) != 0)
658 error (0, errno
, _("fts_close failed"));
666 /* Fill the di_mnt set with local mount point dev/ino pairs. */
669 fill_mount_table (void)
671 struct mount_entry
*mnt_ent
= read_file_system_list (false);
674 struct mount_entry
*mnt_free
;
675 if (!mnt_ent
->me_remote
&& !mnt_ent
->me_dummy
)
678 if (!stat (mnt_ent
->me_mountdir
, &buf
))
679 hash_ins (di_mnt
, buf
.st_ino
, buf
.st_dev
);
682 /* Ignore stat failure. False positives are too common.
683 E.g., "Permission denied" on /run/user/<name>/gvfs. */
688 mnt_ent
= mnt_ent
->me_next
;
689 free_mount_entry (mnt_free
);
694 main (int argc
, char **argv
)
697 bool max_depth_specified
= false;
699 char *files_from
= NULL
;
701 /* Bit flags that control how fts works. */
702 int bit_flags
= FTS_NOSTAT
;
704 /* Select one of the three FTS_ options that control if/when
705 to follow a symlink. */
706 int symlink_deref_bits
= FTS_PHYSICAL
;
708 /* If true, display only a total for each argument. */
709 bool opt_summarize_only
= false;
711 cwd_only
[0] = bad_cast (".");
714 initialize_main (&argc
, &argv
);
715 set_program_name (argv
[0]);
716 setlocale (LC_ALL
, "");
717 bindtextdomain (PACKAGE
, LOCALEDIR
);
718 textdomain (PACKAGE
);
720 atexit (close_stdout
);
722 exclude
= new_exclude ();
724 human_options (getenv ("DU_BLOCK_SIZE"),
725 &human_output_opts
, &output_block_size
);
730 int c
= getopt_long (argc
, argv
, "0abd:chHklmst:xB:DLPSX:",
744 opt_nul_terminate_output
= true;
751 case APPARENT_SIZE_OPTION
:
752 apparent_size
= true;
756 apparent_size
= true;
757 human_output_opts
= 0;
758 output_block_size
= 1;
762 print_grand_total
= true;
766 human_output_opts
= human_autoscale
| human_SI
| human_base_1024
;
767 output_block_size
= 1;
770 case HUMAN_SI_OPTION
:
771 human_output_opts
= human_autoscale
| human_SI
;
772 output_block_size
= 1;
776 human_output_opts
= 0;
777 output_block_size
= 1024;
780 case 'd': /* --max-depth=N */
782 unsigned long int tmp_ulong
;
783 if (xstrtoul (optarg
, NULL
, 0, &tmp_ulong
, NULL
) == LONGINT_OK
784 && tmp_ulong
<= SIZE_MAX
)
786 max_depth_specified
= true;
787 max_depth
= tmp_ulong
;
791 error (0, 0, _("invalid maximum depth %s"),
799 human_output_opts
= 0;
800 output_block_size
= 1024 * 1024;
804 opt_count_all
= true;
808 opt_summarize_only
= true;
814 e
= xstrtoimax (optarg
, NULL
, 0, &opt_threshold
, "kKmMGTPEZY0");
816 xstrtol_fatal (e
, oi
, c
, long_options
, optarg
);
817 if (opt_threshold
== 0 && *optarg
== '-')
819 /* Do not allow -0, as this wouldn't make sense anyway. */
820 error (EXIT_FAILURE
, 0, _("invalid --threshold argument '-0'"));
826 bit_flags
|= FTS_XDEV
;
831 enum strtol_error e
= human_options (optarg
, &human_output_opts
,
834 xstrtol_fatal (e
, oi
, c
, long_options
, optarg
);
838 case 'H': /* NOTE: before 2008-12, -H was equivalent to --si. */
840 symlink_deref_bits
= FTS_COMFOLLOW
| FTS_PHYSICAL
;
843 case 'L': /* --dereference */
844 symlink_deref_bits
= FTS_LOGICAL
;
847 case 'P': /* --no-dereference */
848 symlink_deref_bits
= FTS_PHYSICAL
;
852 opt_separate_dirs
= true;
856 if (add_exclude_file (add_exclude
, exclude
, optarg
,
857 EXCLUDE_WILDCARDS
, '\n'))
859 error (0, errno
, "%s", quotearg_colon (optarg
));
864 case FILES0_FROM_OPTION
:
869 add_exclude (exclude
, optarg
, EXCLUDE_WILDCARDS
);
880 ? XARGMATCH ("--time", optarg
, time_args
, time_types
)
884 case TIME_STYLE_OPTION
:
888 case_GETOPT_HELP_CHAR
;
890 case_GETOPT_VERSION_CHAR (PROGRAM_NAME
, AUTHORS
);
898 usage (EXIT_FAILURE
);
900 if (opt_all
&& opt_summarize_only
)
902 error (0, 0, _("cannot both summarize and show all entries"));
903 usage (EXIT_FAILURE
);
906 if (opt_summarize_only
&& max_depth_specified
&& max_depth
== 0)
909 _("warning: summarizing is the same as using --max-depth=0"));
912 if (opt_summarize_only
&& max_depth_specified
&& max_depth
!= 0)
914 unsigned long int d
= max_depth
;
915 error (0, 0, _("warning: summarizing conflicts with --max-depth=%lu"), d
);
916 usage (EXIT_FAILURE
);
919 if (opt_summarize_only
)
926 error (0, 0, _("warning: options --apparent-size and -b are "
927 "ineffective with --inodes"));
929 output_block_size
= 1;
932 /* Process time style if printing last times. */
937 time_style
= getenv ("TIME_STYLE");
939 /* Ignore TIMESTYLE="locale", for compatibility with ls. */
940 if (! time_style
|| STREQ (time_style
, "locale"))
941 time_style
= "long-iso";
942 else if (*time_style
== '+')
944 /* Ignore anything after a newline, for compatibility
946 char *p
= strchr (time_style
, '\n');
952 /* Ignore "posix-" prefix, for compatibility with ls. */
953 static char const posix_prefix
[] = "posix-";
954 while (strncmp (time_style
, posix_prefix
, sizeof posix_prefix
- 1)
956 time_style
+= sizeof posix_prefix
- 1;
960 if (*time_style
== '+')
961 time_format
= time_style
+ 1;
964 switch (XARGMATCH ("time style", time_style
,
965 time_style_args
, time_style_types
))
967 case full_iso_time_style
:
968 time_format
= "%Y-%m-%d %H:%M:%S.%N %z";
971 case long_iso_time_style
:
972 time_format
= "%Y-%m-%d %H:%M";
976 time_format
= "%Y-%m-%d";
982 struct argv_iterator
*ai
;
985 /* When using --files0-from=F, you may not specify any files
986 on the command-line. */
989 error (0, 0, _("extra operand %s"), quote (argv
[optind
]));
990 fprintf (stderr
, "%s\n",
991 _("file operands cannot be combined with --files0-from"));
992 usage (EXIT_FAILURE
);
995 if (! (STREQ (files_from
, "-") || freopen (files_from
, "r", stdin
)))
996 error (EXIT_FAILURE
, errno
, _("cannot open %s for reading"),
999 ai
= argv_iter_init_stream (stdin
);
1001 /* It's not easy here to count the arguments, so assume the
1007 char **files
= (optind
< argc
? argv
+ optind
: cwd_only
);
1008 ai
= argv_iter_init_argv (files
);
1010 /* Hash all dev,ino pairs if there are multiple arguments, or if
1011 following non-command-line symlinks, because in either case a
1012 file with just one hard link might be seen more than once. */
1013 hash_all
= (optind
+ 1 < argc
|| symlink_deref_bits
== FTS_LOGICAL
);
1019 /* Initialize the set of dev,inode pairs. */
1021 di_mnt
= di_set_alloc ();
1025 fill_mount_table ();
1027 di_files
= di_set_alloc ();
1031 /* If not hashing everything, process_file won't find cycles on its
1032 own, so ask fts_read to check for them accurately. */
1033 if (opt_count_all
|| ! hash_all
)
1034 bit_flags
|= FTS_TIGHT_CYCLE_CHECK
;
1036 bit_flags
|= symlink_deref_bits
;
1037 static char *temp_argv
[] = { NULL
, NULL
};
1041 bool skip_file
= false;
1042 enum argv_iter_err ai_err
;
1043 char *file_name
= argv_iter (ai
, &ai_err
);
1049 goto argv_iter_done
;
1051 error (0, errno
, _("%s: read error"),
1052 quotearg_colon (files_from
));
1054 goto argv_iter_done
;
1058 assert (!"unexpected error code from argv_iter");
1061 if (files_from
&& STREQ (files_from
, "-") && STREQ (file_name
, "-"))
1063 /* Give a better diagnostic in an unusual case:
1064 printf - | du --files0-from=- */
1065 error (0, 0, _("when reading file names from stdin, "
1066 "no file name of %s allowed"),
1071 /* Report and skip any empty file names before invoking fts.
1072 This works around a glitch in fts, which fails immediately
1073 (without looking at the other file names) when given an empty
1077 /* Diagnose a zero-length file name. When it's one
1078 among many, knowing the record number may help.
1079 FIXME: currently print the record number only with
1080 --files0-from=FILE. Maybe do it for argv, too? */
1081 if (files_from
== NULL
)
1082 error (0, 0, "%s", _("invalid zero-length file name"));
1085 /* Using the standard 'filename:line-number:' prefix here is
1086 not totally appropriate, since NUL is the separator, not NL,
1087 but it might be better than nothing. */
1088 unsigned long int file_number
= argv_iter_n_args (ai
);
1089 error (0, 0, "%s:%lu: %s", quotearg_colon (files_from
),
1090 file_number
, _("invalid zero-length file name"));
1099 temp_argv
[0] = file_name
;
1100 ok
&= du_files (temp_argv
, bit_flags
);
1105 argv_iter_free (ai
);
1106 di_set_free (di_files
);
1107 di_set_free (di_mnt
);
1109 if (files_from
&& (ferror (stdin
) || fclose (stdin
) != 0) && ok
)
1110 error (EXIT_FAILURE
, 0, _("error reading %s"), quote (files_from
));
1112 if (print_grand_total
)
1113 print_size (&tot_dui
, _("total"));
1115 exit (ok
? EXIT_SUCCESS
: EXIT_FAILURE
);