1 /* Various processing of names.
3 Copyright (C) 1988, 1992, 1994, 1996, 1997, 1998, 1999, 2000, 2001,
4 2003, 2004, 2005, 2006, 2007, 2009 Free Software Foundation, Inc.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 3, or (at your option) any later
11 This program is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
14 Public License for more details.
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
28 /* User and group names. */
30 struct group
*getgrnam ();
31 struct passwd
*getpwnam ();
32 #if ! HAVE_DECL_GETPWUID
33 struct passwd
*getpwuid ();
35 #if ! HAVE_DECL_GETGRGID
36 struct group
*getgrgid ();
39 /* Make sure you link with the proper libraries if you are running the
40 Yellow Peril (thanks for the good laugh, Ian J.!), or, euh... NIS.
41 This code should also be modified for non-UNIX systems to do something
44 static char *cached_uname
;
45 static char *cached_gname
;
47 static uid_t cached_uid
; /* valid only if cached_uname is not empty */
48 static gid_t cached_gid
; /* valid only if cached_gname is not empty */
50 /* These variables are valid only if nonempty. */
51 static char *cached_no_such_uname
;
52 static char *cached_no_such_gname
;
54 /* These variables are valid only if nonzero. It's not worth optimizing
55 the case for weird systems where 0 is not a valid uid or gid. */
56 static uid_t cached_no_such_uid
;
57 static gid_t cached_no_such_gid
;
59 static void register_individual_file (char const *name
);
61 /* Given UID, find the corresponding UNAME. */
63 uid_to_uname (uid_t uid
, char **uname
)
65 struct passwd
*passwd
;
67 if (uid
!= 0 && uid
== cached_no_such_uid
)
69 *uname
= xstrdup ("");
73 if (!cached_uname
|| uid
!= cached_uid
)
75 passwd
= getpwuid (uid
);
79 assign_string (&cached_uname
, passwd
->pw_name
);
83 cached_no_such_uid
= uid
;
84 *uname
= xstrdup ("");
88 *uname
= xstrdup (cached_uname
);
91 /* Given GID, find the corresponding GNAME. */
93 gid_to_gname (gid_t gid
, char **gname
)
97 if (gid
!= 0 && gid
== cached_no_such_gid
)
99 *gname
= xstrdup ("");
103 if (!cached_gname
|| gid
!= cached_gid
)
105 group
= getgrgid (gid
);
109 assign_string (&cached_gname
, group
->gr_name
);
113 cached_no_such_gid
= gid
;
114 *gname
= xstrdup ("");
118 *gname
= xstrdup (cached_gname
);
121 /* Given UNAME, set the corresponding UID and return 1, or else, return 0. */
123 uname_to_uid (char const *uname
, uid_t
*uidp
)
125 struct passwd
*passwd
;
127 if (cached_no_such_uname
128 && strcmp (uname
, cached_no_such_uname
) == 0)
132 || uname
[0] != cached_uname
[0]
133 || strcmp (uname
, cached_uname
) != 0)
135 passwd
= getpwnam (uname
);
138 cached_uid
= passwd
->pw_uid
;
139 assign_string (&cached_uname
, passwd
->pw_name
);
143 assign_string (&cached_no_such_uname
, uname
);
151 /* Given GNAME, set the corresponding GID and return 1, or else, return 0. */
153 gname_to_gid (char const *gname
, gid_t
*gidp
)
157 if (cached_no_such_gname
158 && strcmp (gname
, cached_no_such_gname
) == 0)
162 || gname
[0] != cached_gname
[0]
163 || strcmp (gname
, cached_gname
) != 0)
165 group
= getgrnam (gname
);
168 cached_gid
= group
->gr_gid
;
169 assign_string (&cached_gname
, gname
);
173 assign_string (&cached_no_such_gname
, gname
);
183 make_name (const char *file_name
)
185 struct name
*p
= xzalloc (sizeof (*p
));
188 p
->name
= xstrdup (file_name
);
189 p
->length
= strlen (p
->name
);
194 free_name (struct name
*p
)
205 /* Names from the command call. */
207 static struct name
*namelist
; /* first name in list, if any */
208 static struct name
*nametail
; /* end of name list */
210 /* File name arguments are processed in two stages: first a
211 name_array (see below) is filled, then the names from it
212 are moved into the namelist.
214 This awkward process is needed only to implement --same-order option,
215 which is meant to help process large archives on machines with
216 limited memory. With this option on, namelist contains at most one
217 entry, which diminishes the memory consumption.
219 However, I very much doubt if we still need this -- Sergey */
221 /* A name_array element contains entries of three types: */
223 #define NELT_NAME 0 /* File name */
224 #define NELT_CHDIR 1 /* Change directory request */
225 #define NELT_FMASK 2 /* Change fnmatch options request */
227 struct name_elt
/* A name_array element. */
229 char type
; /* Element type, see NELT_* constants above */
232 const char *name
; /* File or directory name */
233 int matching_flags
;/* fnmatch options if type == NELT_FMASK */
237 static struct name_elt
*name_array
; /* store an array of names */
238 static size_t allocated_names
; /* how big is the array? */
239 static size_t names
; /* how many entries does it have? */
240 static size_t name_index
; /* how many of the entries have we scanned? */
242 /* Check the size of name_array, reallocating it as necessary. */
246 if (names
== allocated_names
)
248 if (allocated_names
== 0)
249 allocated_names
= 10; /* Set initial allocation */
250 name_array
= x2nrealloc (name_array
, &allocated_names
,
251 sizeof (name_array
[0]));
255 /* Add to name_array the file NAME with fnmatch options MATCHING_FLAGS */
257 name_add_name (const char *name
, int matching_flags
)
259 static int prev_flags
= 0; /* FIXME: Or EXCLUDE_ANCHORED? */
263 ep
= &name_array
[names
++];
264 if (prev_flags
!= matching_flags
)
266 ep
->type
= NELT_FMASK
;
267 ep
->v
.matching_flags
= matching_flags
;
268 prev_flags
= matching_flags
;
270 ep
= &name_array
[names
++];
272 ep
->type
= NELT_NAME
;
276 /* Add to name_array a chdir request for the directory NAME */
278 name_add_dir (const char *name
)
282 ep
= &name_array
[names
++];
283 ep
->type
= NELT_CHDIR
;
288 /* Names from external name file. */
290 static char *name_buffer
; /* buffer to hold the current file name */
291 static size_t name_buffer_length
; /* allocated length of name_buffer */
293 /* Set up to gather file names for tar. They can either come from a
294 file or were saved from decoding arguments. */
298 name_buffer
= xmalloc (NAME_FIELD_SIZE
+ 2);
299 name_buffer_length
= NAME_FIELD_SIZE
;
309 static int matching_flags
; /* exclude_fnmatch options */
311 /* Get the next NELT_NAME element from name_array. Result is in
312 static storage and can't be relied upon across two calls.
314 If CHANGE_DIRS is true, treat any entries of type NELT_CHDIR as
315 the request to change to the given directory.
317 Entries of type NELT_FMASK cause updates of the matching_flags
320 name_next_elt (int change_dirs
)
322 static struct name_elt entry
;
326 while (name_index
!= names
)
331 ep
= &name_array
[name_index
++];
332 if (ep
->type
== NELT_FMASK
)
334 matching_flags
= ep
->v
.matching_flags
;
339 source_len
= strlen (source
);
340 if (name_buffer_length
< source_len
)
344 name_buffer_length
*= 2;
345 if (! name_buffer_length
)
348 while (name_buffer_length
< source_len
);
351 name_buffer
= xmalloc (name_buffer_length
+ 2);
353 strcpy (name_buffer
, source
);
355 /* Zap trailing slashes. */
357 cursor
= name_buffer
+ strlen (name_buffer
) - 1;
358 while (cursor
> name_buffer
&& ISSLASH (*cursor
))
361 if (change_dirs
&& ep
->type
== NELT_CHDIR
)
363 if (chdir (name_buffer
) < 0)
364 chdir_fatal (name_buffer
);
369 unquote_string (name_buffer
);
370 if (incremental_option
)
371 register_individual_file (name_buffer
);
372 entry
.type
= ep
->type
;
373 entry
.v
.name
= name_buffer
;
382 name_next (int change_dirs
)
384 struct name_elt
*nelt
= name_next_elt (change_dirs
);
385 return nelt
? nelt
->v
.name
: NULL
;
388 /* Gather names in a list for scanning. Could hash them later if we
391 If the names are already sorted to match the archive, we just read
392 them one by one. name_gather reads the first one, and it is called
393 by name_match as appropriate to read the next ones. At EOF, the
394 last name read is just left in the buffer. This option lets users
395 of small machines extract an arbitrary number of files by doing
396 "tar t" and editing down the list of files. */
401 /* Buffer able to hold a single name. */
402 static struct name
*buffer
= NULL
;
406 if (same_order_option
)
408 static int change_dir
;
410 while ((ep
= name_next_elt (0)) && ep
->type
== NELT_CHDIR
)
411 change_dir
= chdir_arg (xstrdup (ep
->v
.name
));
416 buffer
= make_name (ep
->v
.name
);
417 buffer
->change_dir
= change_dir
;
419 buffer
->found_count
= 0;
420 buffer
->matching_flags
= matching_flags
;
421 buffer
->directory
= NULL
;
422 buffer
->parent
= NULL
;
423 buffer
->cmdline
= true;
425 namelist
= nametail
= buffer
;
428 addname (0, change_dir
, false, NULL
);
432 /* Non sorted names -- read them all in. */
437 int change_dir0
= change_dir
;
438 while ((ep
= name_next_elt (0)) && ep
->type
== NELT_CHDIR
)
439 change_dir
= chdir_arg (xstrdup (ep
->v
.name
));
442 addname (ep
->v
.name
, change_dir
, true, NULL
);
445 if (change_dir
!= change_dir0
)
446 addname (NULL
, change_dir
, false, NULL
);
453 /* Add a name to the namelist. */
455 addname (char const *string
, int change_dir
, bool cmdline
, struct name
*parent
)
457 struct name
*name
= make_name (string
);
459 name
->prev
= nametail
;
461 name
->found_count
= 0;
462 name
->matching_flags
= matching_flags
;
463 name
->change_dir
= change_dir
;
464 name
->directory
= NULL
;
465 name
->parent
= parent
;
466 name
->cmdline
= cmdline
;
469 nametail
->next
= name
;
476 /* Find a match for FILE_NAME (whose string length is LENGTH) in the name
479 namelist_match (char const *file_name
, size_t length
)
483 for (p
= namelist
; p
; p
= p
->next
)
486 && exclude_fnmatch (p
->name
, file_name
, p
->matching_flags
))
494 remname (struct name
*name
)
498 if ((p
= name
->prev
) != NULL
)
499 p
->next
= name
->next
;
501 namelist
= name
->next
;
503 if ((p
= name
->next
) != NULL
)
504 p
->prev
= name
->prev
;
506 nametail
= name
->prev
;
509 /* Return true if and only if name FILE_NAME (from an archive) matches any
510 name from the namelist. */
512 name_match (const char *file_name
)
514 size_t length
= strlen (file_name
);
518 struct name
*cursor
= namelist
;
523 if (cursor
->name
[0] == 0)
525 chdir_do (cursor
->change_dir
);
531 cursor
= namelist_match (file_name
, length
);
534 if (!(ISSLASH (file_name
[cursor
->length
]) && recursion_option
)
535 || cursor
->found_count
== 0)
536 cursor
->found_count
++; /* remember it matched */
537 if (starting_file_option
)
543 chdir_do (cursor
->change_dir
);
545 /* We got a match. */
546 return ISFOUND (cursor
);
549 /* Filename from archive not found in namelist. If we have the whole
550 namelist here, just return 0. Otherwise, read the next name in and
551 compare it. If this was the last name, namelist->found_count will
552 remain on. If not, we loop to compare the newly read name. */
554 if (same_order_option
&& namelist
->found_count
)
556 name_gather (); /* read one more */
557 if (namelist
->found_count
)
565 /* Returns true if all names from the namelist were processed.
566 P is the stat_info of the most recently processed entry.
567 The decision is postponed until the next entry is read if:
569 1) P ended with a slash (i.e. it was a directory)
570 2) P matches any entry from the namelist *and* represents a subdirectory
571 or a file lying under this entry (in the terms of directory structure).
573 This is necessary to handle contents of directories. */
575 all_names_found (struct tar_stat_info
*p
)
577 struct name
const *cursor
;
580 if (!p
->file_name
|| occurrence_option
== 0 || p
->had_trailing_slash
)
582 len
= strlen (p
->file_name
);
583 for (cursor
= namelist
; cursor
; cursor
= cursor
->next
)
585 if ((cursor
->name
[0] && !WASFOUND (cursor
))
586 || (len
>= cursor
->length
&& ISSLASH (p
->file_name
[cursor
->length
])))
593 regex_usage_warning (const char *name
)
595 static int warned_once
= 0;
597 if (warn_regex_usage
&& fnmatch_pattern_has_wildcards (name
, 0))
601 _("Pattern matching characters used in file names")));
603 _("Use --wildcards to enable pattern matching,"
604 " or --no-wildcards to suppress this warning")));
609 /* Print the names of things in the namelist that were not matched. */
611 names_notfound (void)
613 struct name
const *cursor
;
615 for (cursor
= namelist
; cursor
; cursor
= cursor
->next
)
616 if (!WASFOUND (cursor
) && cursor
->name
[0])
618 regex_usage_warning (cursor
->name
);
620 (cursor
->found_count
== 0) ?
621 _("%s: Not found in archive") :
622 _("%s: Required occurrence not found in archive"),
623 quotearg_colon (cursor
->name
)));
626 /* Don't bother freeing the name list; we're about to exit. */
630 if (same_order_option
)
634 while ((name
= name_next (1)) != NULL
)
636 regex_usage_warning (name
);
637 ERROR ((0, 0, _("%s: Not found in archive"),
638 quotearg_colon (name
)));
644 label_notfound (void)
646 struct name
const *cursor
;
651 for (cursor
= namelist
; cursor
; cursor
= cursor
->next
)
652 if (WASFOUND (cursor
))
656 error (0, 0, _("Archive label mismatch"));
657 set_exit_status (TAREXIT_DIFFERS
);
659 for (cursor
= namelist
; cursor
; cursor
= cursor
->next
)
661 if (regex_usage_warning (cursor
->name
))
665 /* Don't bother freeing the name list; we're about to exit. */
669 if (same_order_option
)
673 while ((name
= name_next (1)) != NULL
674 && regex_usage_warning (name
) == 0)
679 /* Sorting name lists. */
681 /* Sort *singly* linked LIST of names, of given LENGTH, using COMPARE
682 to order names. Return the sorted list. Note that after calling
683 this function, the `prev' links in list elements are messed up.
685 Apart from the type `struct name' and the definition of SUCCESSOR,
686 this is a generic list-sorting function, but it's too painful to
687 make it both generic and portable
691 merge_sort_sll (struct name
*list
, int length
,
692 int (*compare
) (struct name
const*, struct name
const*))
694 struct name
*first_list
;
695 struct name
*second_list
;
699 struct name
**merge_point
;
703 # define SUCCESSOR(name) ((name)->next)
710 if ((*compare
) (list
, SUCCESSOR (list
)) > 0)
712 result
= SUCCESSOR (list
);
713 SUCCESSOR (result
) = list
;
714 SUCCESSOR (list
) = 0;
721 first_length
= (length
+ 1) / 2;
722 second_length
= length
/ 2;
723 for (cursor
= list
, counter
= first_length
- 1;
725 cursor
= SUCCESSOR (cursor
), counter
--)
727 second_list
= SUCCESSOR (cursor
);
728 SUCCESSOR (cursor
) = 0;
730 first_list
= merge_sort_sll (first_list
, first_length
, compare
);
731 second_list
= merge_sort_sll (second_list
, second_length
, compare
);
733 merge_point
= &result
;
734 while (first_list
&& second_list
)
735 if ((*compare
) (first_list
, second_list
) < 0)
737 cursor
= SUCCESSOR (first_list
);
738 *merge_point
= first_list
;
739 merge_point
= &SUCCESSOR (first_list
);
744 cursor
= SUCCESSOR (second_list
);
745 *merge_point
= second_list
;
746 merge_point
= &SUCCESSOR (second_list
);
747 second_list
= cursor
;
750 *merge_point
= first_list
;
752 *merge_point
= second_list
;
759 /* Sort doubly linked LIST of names, of given LENGTH, using COMPARE
760 to order names. Return the sorted list. */
762 merge_sort (struct name
*list
, int length
,
763 int (*compare
) (struct name
const*, struct name
const*))
765 struct name
*head
, *p
, *prev
;
766 head
= merge_sort_sll (list
, length
, compare
);
767 /* Fixup prev pointers */
768 for (prev
= NULL
, p
= head
; p
; prev
= p
, p
= p
->next
)
773 /* A comparison function for sorting names. Put found names last;
774 break ties by string comparison. */
777 compare_names_found (struct name
const *n1
, struct name
const *n2
)
779 int found_diff
= WASFOUND (n2
) - WASFOUND (n1
);
780 return found_diff
? found_diff
: strcmp (n1
->name
, n2
->name
);
783 /* Simple comparison by names. */
785 compare_names (struct name
const *n1
, struct name
const *n2
)
787 return strcmp (n1
->name
, n2
->name
);
791 /* Add all the dirs under NAME, which names a directory, to the namelist.
792 If any of the files is a directory, recurse on the subdirectory.
793 DEVICE is the device not to leave, if the -l option is specified.
794 CMDLINE is true, if the NAME appeared on the command line. */
797 add_hierarchy_to_namelist (struct name
*name
, dev_t device
, bool cmdline
)
801 name_fill_directory (name
, device
, cmdline
);
802 buffer
= directory_contents (name
->directory
);
805 struct name
*child_head
= NULL
, *child_tail
= NULL
;
806 size_t name_length
= name
->length
;
807 size_t allocated_length
= (name_length
>= NAME_FIELD_SIZE
808 ? name_length
+ NAME_FIELD_SIZE
810 char *namebuf
= xmalloc (allocated_length
+ 1);
811 /* FIXME: + 2 above? */
813 size_t string_length
;
814 int change_dir
= name
->change_dir
;
816 strcpy (namebuf
, name
->name
);
817 if (! ISSLASH (namebuf
[name_length
- 1]))
819 namebuf
[name_length
++] = '/';
820 namebuf
[name_length
] = '\0';
823 for (string
= buffer
; *string
; string
+= string_length
+ 1)
825 string_length
= strlen (string
);
830 if (allocated_length
<= name_length
+ string_length
)
834 allocated_length
*= 2;
835 if (! allocated_length
)
838 while (allocated_length
<= name_length
+ string_length
);
840 namebuf
= xrealloc (namebuf
, allocated_length
+ 1);
842 strcpy (namebuf
+ name_length
, string
+ 1);
843 np
= addname (namebuf
, change_dir
, false, name
);
847 child_tail
->sibling
= np
;
849 add_hierarchy_to_namelist (np
, device
, false);
854 name
->child
= child_head
;
858 /* Auxiliary functions for hashed table of struct name's. */
861 name_hash (void const *entry
, size_t n_buckets
)
863 struct name
const *name
= entry
;
864 return hash_string (name
->caname
, n_buckets
);
867 /* Compare two directories for equality of their names. */
869 name_compare (void const *entry1
, void const *entry2
)
871 struct name
const *name1
= entry1
;
872 struct name
const *name2
= entry2
;
873 return strcmp (name1
->caname
, name2
->caname
) == 0;
877 /* Rebase `name' member of CHILD and all its siblings to
880 rebase_child_list (struct name
*child
, struct name
*parent
)
882 size_t old_prefix_len
= child
->parent
->length
;
883 size_t new_prefix_len
= parent
->length
;
884 char *new_prefix
= parent
->name
;
886 for (; child
; child
= child
->sibling
)
888 size_t size
= child
->length
- old_prefix_len
+ new_prefix_len
;
889 char *newp
= xmalloc (size
+ 1);
890 strcpy (newp
, new_prefix
);
891 strcat (newp
, child
->name
+ old_prefix_len
);
894 child
->length
= size
;
896 rebase_directory (child
->directory
,
897 child
->parent
->name
, old_prefix_len
,
898 new_prefix
, new_prefix_len
);
902 /* Collect all the names from argv[] (or whatever), expand them into a
903 directory tree, and sort them. This gets only subdirectories, not
907 collect_and_sort_names (void)
910 struct name
*next_name
, *prev_name
= NULL
;
918 addname (".", 0, false, NULL
);
920 if (listed_incremental_option
)
922 switch (chdir_count ())
928 if (namelist
->change_dir
== 0)
930 _("Using -C option inside file list is not "
931 "allowed with --listed-incremental")));
936 _("Only one -C option is allowed with "
937 "--listed-incremental")));
940 read_directory_file ();
944 for (name
= namelist
; name
; name
= name
->next
, num_names
++)
946 if (name
->found_count
|| name
->directory
)
948 if (name
->matching_flags
& EXCLUDE_WILDCARDS
)
949 /* NOTE: EXCLUDE_ANCHORED is not relevant here */
950 /* FIXME: just skip regexps for now */
952 chdir_do (name
->change_dir
);
954 if (name
->name
[0] == 0)
957 if (deref_stat (dereference_option
, name
->name
, &statbuf
) != 0)
959 stat_diag (name
->name
);
962 if (S_ISDIR (statbuf
.st_mode
))
965 add_hierarchy_to_namelist (name
, statbuf
.st_dev
, true);
969 namelist
= merge_sort (namelist
, num_names
, compare_names
);
972 nametab
= hash_initialize (0, 0,
975 for (name
= namelist
; name
; name
= next_name
)
977 next_name
= name
->next
;
978 name
->caname
= normalize_filename (name
->name
);
981 struct name
*p
= hash_lookup (nametab
, name
);
984 /* Keep the one listed in the command line */
988 rebase_child_list (p
->child
, name
);
989 /* FIXME: remove_directory (p->caname); ? */
997 rebase_child_list (name
->child
, p
);
998 /* FIXME: remove_directory (name->caname); ? */
1005 name
->found_count
= 0;
1006 if (!hash_insert (nametab
, name
))
1011 nametail
= prev_name
;
1012 hash_free (nametab
);
1014 namelist
= merge_sort (namelist
, num_names
, compare_names_found
);
1016 if (listed_incremental_option
)
1018 for (name
= namelist
; name
&& name
->name
[0] == 0; name
++)
1021 append_incremental_renames (name
->directory
);
1025 /* This is like name_match, except that
1026 1. It returns a pointer to the name it matched, and doesn't set FOUND
1027 in structure. The caller will have to do that if it wants to.
1028 2. If the namelist is empty, it returns null, unlike name_match, which
1031 name_scan (const char *file_name
)
1033 size_t length
= strlen (file_name
);
1037 struct name
*cursor
= namelist_match (file_name
, length
);
1041 /* Filename from archive not found in namelist. If we have the whole
1042 namelist here, just return 0. Otherwise, read the next name in and
1043 compare it. If this was the last name, namelist->found_count will
1044 remain on. If not, we loop to compare the newly read name. */
1046 if (same_order_option
&& namelist
&& namelist
->found_count
)
1048 name_gather (); /* read one more */
1049 if (namelist
->found_count
)
1057 /* This returns a name from the namelist which doesn't have ->found
1058 set. It sets ->found before returning, so successive calls will
1059 find and return all the non-found names in the namelist. */
1060 struct name
*gnu_list_name
;
1066 gnu_list_name
= namelist
;
1067 while (gnu_list_name
1068 && (gnu_list_name
->found_count
|| gnu_list_name
->name
[0] == 0))
1069 gnu_list_name
= gnu_list_name
->next
;
1072 gnu_list_name
->found_count
++;
1073 chdir_do (gnu_list_name
->change_dir
);
1074 return gnu_list_name
;
1080 blank_name_list (void)
1085 for (name
= namelist
; name
; name
= name
->next
)
1086 name
->found_count
= 0;
1089 /* Yield a newly allocated file name consisting of FILE_NAME concatenated to
1090 NAME, with an intervening slash if FILE_NAME does not already end in one. */
1092 new_name (const char *file_name
, const char *name
)
1094 size_t file_name_len
= strlen (file_name
);
1095 size_t namesize
= strlen (name
) + 1;
1096 int slash
= file_name_len
&& ! ISSLASH (file_name
[file_name_len
- 1]);
1097 char *buffer
= xmalloc (file_name_len
+ slash
+ namesize
);
1098 memcpy (buffer
, file_name
, file_name_len
);
1099 buffer
[file_name_len
] = '/';
1100 memcpy (buffer
+ file_name_len
+ slash
, name
, namesize
);
1104 /* Return nonzero if file NAME is excluded. */
1106 excluded_name (char const *name
)
1108 return excluded_file_name (excluded
, name
+ FILE_SYSTEM_PREFIX_LEN (name
));
1111 static Hash_table
*individual_file_table
;
1114 register_individual_file (char const *name
)
1118 if (deref_stat (dereference_option
, name
, &st
) != 0)
1119 return; /* Will be complained about later */
1120 if (S_ISDIR (st
.st_mode
))
1123 hash_string_insert (&individual_file_table
, name
);
1127 is_individual_file (char const *name
)
1129 return hash_string_lookup (individual_file_table
, name
);
1134 /* Return the size of the prefix of FILE_NAME that is removed after
1135 stripping NUM leading file name components. NUM must be
1139 stripped_prefix_len (char const *file_name
, size_t num
)
1141 char const *p
= file_name
+ FILE_SYSTEM_PREFIX_LEN (file_name
);
1142 while (ISSLASH (*p
))
1146 bool slash
= ISSLASH (*p
);
1151 return p
- file_name
;
1152 while (ISSLASH (*p
))
1159 /* Return nonzero if NAME contains ".." as a file name component. */
1161 contains_dot_dot (char const *name
)
1163 char const *p
= name
+ FILE_SYSTEM_PREFIX_LEN (name
);
1167 if (p
[0] == '.' && p
[1] == '.' && (ISSLASH (p
[2]) || !p
[2]))
1170 while (! ISSLASH (*p
))