2 * Utilities for paths and pathnames
6 #include "string-list.h"
9 static int get_st_mode_bits(const char *path
, int *mode
)
12 if (lstat(path
, &st
) < 0)
18 static char bad_path
[] = "/bad-path/";
20 static struct strbuf
*get_pathname(void)
22 static struct strbuf pathname_array
[4] = {
23 STRBUF_INIT
, STRBUF_INIT
, STRBUF_INIT
, STRBUF_INIT
26 struct strbuf
*sb
= &pathname_array
[3 & ++index
];
31 static char *cleanup_path(char *path
)
34 if (!memcmp(path
, "./", 2)) {
42 static void strbuf_cleanup_path(struct strbuf
*sb
)
44 char *path
= cleanup_path(sb
->buf
);
46 strbuf_remove(sb
, 0, path
- sb
->buf
);
49 char *mksnpath(char *buf
, size_t n
, const char *fmt
, ...)
55 len
= vsnprintf(buf
, n
, fmt
, args
);
58 strlcpy(buf
, bad_path
, n
);
61 return cleanup_path(buf
);
64 static int dir_prefix(const char *buf
, const char *dir
)
66 int len
= strlen(dir
);
67 return !strncmp(buf
, dir
, len
) &&
68 (is_dir_sep(buf
[len
]) || buf
[len
] == '\0');
71 /* $buf =~ m|$dir/+$file| but without regex */
72 static int is_dir_file(const char *buf
, const char *dir
, const char *file
)
74 int len
= strlen(dir
);
75 if (strncmp(buf
, dir
, len
) || !is_dir_sep(buf
[len
]))
77 while (is_dir_sep(buf
[len
]))
79 return !strcmp(buf
+ len
, file
);
82 static void replace_dir(struct strbuf
*buf
, int len
, const char *newdir
)
84 int newlen
= strlen(newdir
);
85 int need_sep
= (buf
->buf
[len
] && !is_dir_sep(buf
->buf
[len
])) &&
86 !is_dir_sep(newdir
[newlen
- 1]);
88 len
--; /* keep one char, to be replaced with '/' */
89 strbuf_splice(buf
, 0, len
, newdir
, newlen
);
91 buf
->buf
[newlen
] = '/';
95 /* Not considered garbage for report_linked_checkout_garbage */
96 unsigned ignore_garbage
:1;
98 /* Not common even though its parent is */
103 static struct common_dir common_list
[] = {
104 { 0, 1, 0, "branches" },
105 { 0, 1, 0, "hooks" },
107 { 0, 0, 1, "info/sparse-checkout" },
109 { 1, 1, 1, "logs/HEAD" },
110 { 0, 1, 0, "lost-found" },
111 { 0, 1, 0, "objects" },
113 { 0, 1, 0, "remotes" },
114 { 0, 1, 0, "worktrees" },
115 { 0, 1, 0, "rr-cache" },
117 { 0, 0, 0, "config" },
118 { 1, 0, 0, "gc.pid" },
119 { 0, 0, 0, "packed-refs" },
120 { 0, 0, 0, "shallow" },
125 * A compressed trie. A trie node consists of zero or more characters that
126 * are common to all elements with this prefix, optionally followed by some
127 * children. If value is not NULL, the trie node is a terminal node.
129 * For example, consider the following set of strings:
135 * The trie would look look like:
136 * root: len = 0, children a and d non-NULL, value = NULL.
137 * a: len = 2, contents = bc, value = (data for "abc")
138 * d: len = 2, contents = ef, children i non-NULL, value = (data for "def")
139 * i: len = 3, contents = nit, children e and i non-NULL, value = NULL
140 * e: len = 0, children all NULL, value = (data for "definite")
141 * i: len = 2, contents = on, children all NULL,
142 * value = (data for "definition")
145 struct trie
*children
[256];
151 static struct trie
*make_trie_node(const char *key
, void *value
)
153 struct trie
*new_node
= xcalloc(1, sizeof(*new_node
));
154 new_node
->len
= strlen(key
);
156 new_node
->contents
= xmalloc(new_node
->len
);
157 memcpy(new_node
->contents
, key
, new_node
->len
);
159 new_node
->value
= value
;
164 * Add a key/value pair to a trie. The key is assumed to be \0-terminated.
165 * If there was an existing value for this key, return it.
167 static void *add_to_trie(struct trie
*root
, const char *key
, void *value
)
174 /* we have reached the end of the key */
180 for (i
= 0; i
< root
->len
; i
++) {
181 if (root
->contents
[i
] == key
[i
])
185 * Split this node: child will contain this node's
188 child
= malloc(sizeof(*child
));
189 memcpy(child
->children
, root
->children
, sizeof(root
->children
));
191 child
->len
= root
->len
- i
- 1;
193 child
->contents
= xstrndup(root
->contents
+ i
+ 1,
196 child
->value
= root
->value
;
200 memset(root
->children
, 0, sizeof(root
->children
));
201 root
->children
[(unsigned char)root
->contents
[i
]] = child
;
203 /* This is the newly-added child. */
204 root
->children
[(unsigned char)key
[i
]] =
205 make_trie_node(key
+ i
+ 1, value
);
209 /* We have matched the entire compressed section */
211 child
= root
->children
[(unsigned char)key
[root
->len
]];
213 return add_to_trie(child
, key
+ root
->len
+ 1, value
);
215 child
= make_trie_node(key
+ root
->len
+ 1, value
);
216 root
->children
[(unsigned char)key
[root
->len
]] = child
;
226 typedef int (*match_fn
)(const char *unmatched
, void *data
, void *baton
);
229 * Search a trie for some key. Find the longest /-or-\0-terminated
230 * prefix of the key for which the trie contains a value. Call fn
231 * with the unmatched portion of the key and the found value, and
232 * return its return value. If there is no such prefix, return -1.
234 * The key is partially normalized: consecutive slashes are skipped.
236 * For example, consider the trie containing only [refs,
237 * refs/worktree] (both with values).
239 * | key | unmatched | val from node | return value |
240 * |-----------------|------------|---------------|--------------|
241 * | a | not called | n/a | -1 |
242 * | refs | \0 | refs | as per fn |
243 * | refs/ | / | refs | as per fn |
244 * | refs/w | /w | refs | as per fn |
245 * | refs/worktree | \0 | refs/worktree | as per fn |
246 * | refs/worktree/ | / | refs/worktree | as per fn |
247 * | refs/worktree/a | /a | refs/worktree | as per fn |
248 * |-----------------|------------|---------------|--------------|
251 static int trie_find(struct trie
*root
, const char *key
, match_fn fn
,
259 /* we have reached the end of the key */
260 if (root
->value
&& !root
->len
)
261 return fn(key
, root
->value
, baton
);
266 for (i
= 0; i
< root
->len
; i
++) {
267 /* Partial path normalization: skip consecutive slashes. */
268 if (key
[i
] == '/' && key
[i
+1] == '/') {
272 if (root
->contents
[i
] != key
[i
])
276 /* Matched the entire compressed section */
280 return fn(key
, root
->value
, baton
);
282 /* Partial path normalization: skip consecutive slashes */
283 while (key
[0] == '/' && key
[1] == '/')
286 child
= root
->children
[(unsigned char)*key
];
288 result
= trie_find(child
, key
+ 1, fn
, baton
);
292 if (result
>= 0 || (*key
!= '/' && *key
!= 0))
295 return fn(key
, root
->value
, baton
);
300 static struct trie common_trie
;
301 static int common_trie_done_setup
;
303 static void init_common_trie(void)
305 struct common_dir
*p
;
307 if (common_trie_done_setup
)
310 for (p
= common_list
; p
->dirname
; p
++)
311 add_to_trie(&common_trie
, p
->dirname
, p
);
313 common_trie_done_setup
= 1;
317 * Helper function for update_common_dir: returns 1 if the dir
320 static int check_common(const char *unmatched
, void *value
, void *baton
)
322 struct common_dir
*dir
= value
;
327 if (dir
->is_dir
&& (unmatched
[0] == 0 || unmatched
[0] == '/'))
328 return !dir
->exclude
;
330 if (!dir
->is_dir
&& unmatched
[0] == 0)
331 return !dir
->exclude
;
336 static void update_common_dir(struct strbuf
*buf
, int git_dir_len
)
338 char *base
= buf
->buf
+ git_dir_len
;
340 if (trie_find(&common_trie
, base
, check_common
, NULL
) > 0)
341 replace_dir(buf
, git_dir_len
, get_git_common_dir());
344 void report_linked_checkout_garbage(void)
346 struct strbuf sb
= STRBUF_INIT
;
347 const struct common_dir
*p
;
350 if (!git_common_dir_env
)
352 strbuf_addf(&sb
, "%s/", get_git_dir());
354 for (p
= common_list
; p
->dirname
; p
++) {
355 const char *path
= p
->dirname
;
356 if (p
->ignore_garbage
)
358 strbuf_setlen(&sb
, len
);
359 strbuf_addstr(&sb
, path
);
360 if (file_exists(sb
.buf
))
361 report_garbage("unused in linked checkout", sb
.buf
);
366 static void adjust_git_path(struct strbuf
*buf
, int git_dir_len
)
368 const char *base
= buf
->buf
+ git_dir_len
;
369 if (git_graft_env
&& is_dir_file(base
, "info", "grafts"))
370 strbuf_splice(buf
, 0, buf
->len
,
371 get_graft_file(), strlen(get_graft_file()));
372 else if (git_index_env
&& !strcmp(base
, "index"))
373 strbuf_splice(buf
, 0, buf
->len
,
374 get_index_file(), strlen(get_index_file()));
375 else if (git_db_env
&& dir_prefix(base
, "objects"))
376 replace_dir(buf
, git_dir_len
+ 7, get_object_directory());
377 else if (git_common_dir_env
)
378 update_common_dir(buf
, git_dir_len
);
381 static void do_git_path(struct strbuf
*buf
, const char *fmt
, va_list args
)
384 strbuf_addstr(buf
, get_git_dir());
385 if (buf
->len
&& !is_dir_sep(buf
->buf
[buf
->len
- 1]))
386 strbuf_addch(buf
, '/');
387 gitdir_len
= buf
->len
;
388 strbuf_vaddf(buf
, fmt
, args
);
389 adjust_git_path(buf
, gitdir_len
);
390 strbuf_cleanup_path(buf
);
393 void strbuf_git_path(struct strbuf
*sb
, const char *fmt
, ...)
397 do_git_path(sb
, fmt
, args
);
401 const char *git_path(const char *fmt
, ...)
403 struct strbuf
*pathname
= get_pathname();
406 do_git_path(pathname
, fmt
, args
);
408 return pathname
->buf
;
411 char *git_pathdup(const char *fmt
, ...)
413 struct strbuf path
= STRBUF_INIT
;
416 do_git_path(&path
, fmt
, args
);
418 return strbuf_detach(&path
, NULL
);
421 char *mkpathdup(const char *fmt
, ...)
423 struct strbuf sb
= STRBUF_INIT
;
426 strbuf_vaddf(&sb
, fmt
, args
);
428 strbuf_cleanup_path(&sb
);
429 return strbuf_detach(&sb
, NULL
);
432 const char *mkpath(const char *fmt
, ...)
435 struct strbuf
*pathname
= get_pathname();
437 strbuf_vaddf(pathname
, fmt
, args
);
439 return cleanup_path(pathname
->buf
);
442 static void do_submodule_path(struct strbuf
*buf
, const char *path
,
443 const char *fmt
, va_list args
)
447 strbuf_addstr(buf
, path
);
448 if (buf
->len
&& buf
->buf
[buf
->len
- 1] != '/')
449 strbuf_addch(buf
, '/');
450 strbuf_addstr(buf
, ".git");
452 git_dir
= read_gitfile(buf
->buf
);
455 strbuf_addstr(buf
, git_dir
);
457 strbuf_addch(buf
, '/');
459 strbuf_vaddf(buf
, fmt
, args
);
460 strbuf_cleanup_path(buf
);
463 char *git_pathdup_submodule(const char *path
, const char *fmt
, ...)
466 struct strbuf buf
= STRBUF_INIT
;
468 do_submodule_path(&buf
, path
, fmt
, args
);
470 return strbuf_detach(&buf
, NULL
);
473 void strbuf_git_path_submodule(struct strbuf
*buf
, const char *path
,
474 const char *fmt
, ...)
478 do_submodule_path(buf
, path
, fmt
, args
);
482 int validate_headref(const char *path
)
485 char *buf
, buffer
[256];
486 unsigned char sha1
[20];
490 if (lstat(path
, &st
) < 0)
493 /* Make sure it is a "refs/.." symlink */
494 if (S_ISLNK(st
.st_mode
)) {
495 len
= readlink(path
, buffer
, sizeof(buffer
)-1);
496 if (len
>= 5 && !memcmp("refs/", buffer
, 5))
502 * Anything else, just open it and try to see if it is a symbolic ref.
504 fd
= open(path
, O_RDONLY
);
507 len
= read_in_full(fd
, buffer
, sizeof(buffer
)-1);
511 * Is it a symbolic ref?
515 if (!memcmp("ref:", buffer
, 4)) {
518 while (len
&& isspace(*buf
))
520 if (len
>= 5 && !memcmp("refs/", buf
, 5))
525 * Is this a detached HEAD?
527 if (!get_sha1_hex(buffer
, sha1
))
533 static struct passwd
*getpw_str(const char *username
, size_t len
)
536 char *username_z
= xmemdupz(username
, len
);
537 pw
= getpwnam(username_z
);
543 * Return a string with ~ and ~user expanded via getpw*. If buf != NULL,
544 * then it is a newly allocated string. Returns NULL on getpw failure or
547 char *expand_user_path(const char *path
)
549 struct strbuf user_path
= STRBUF_INIT
;
550 const char *to_copy
= path
;
554 if (path
[0] == '~') {
555 const char *first_slash
= strchrnul(path
, '/');
556 const char *username
= path
+ 1;
557 size_t username_len
= first_slash
- username
;
558 if (username_len
== 0) {
559 const char *home
= getenv("HOME");
562 strbuf_addstr(&user_path
, home
);
564 struct passwd
*pw
= getpw_str(username
, username_len
);
567 strbuf_addstr(&user_path
, pw
->pw_dir
);
569 to_copy
= first_slash
;
571 strbuf_addstr(&user_path
, to_copy
);
572 return strbuf_detach(&user_path
, NULL
);
574 strbuf_release(&user_path
);
579 * First, one directory to try is determined by the following algorithm.
581 * (0) If "strict" is given, the path is used as given and no DWIM is
583 * (1) "~/path" to mean path under the running user's home directory;
584 * (2) "~user/path" to mean path under named user's home directory;
585 * (3) "relative/path" to mean cwd relative directory; or
586 * (4) "/absolute/path" to mean absolute directory.
588 * Unless "strict" is given, we check "%s/.git", "%s", "%s.git/.git", "%s.git"
589 * in this order. We select the first one that is a valid git repository, and
590 * chdir() to it. If none match, or we fail to chdir, we return NULL.
592 * If all goes well, we return the directory we used to chdir() (but
593 * before ~user is expanded), avoiding getcwd() resolving symbolic
594 * links. User relative paths are also returned as they are given,
595 * except DWIM suffixing.
597 const char *enter_repo(const char *path
, int strict
)
599 static char used_path
[PATH_MAX
];
600 static char validated_path
[PATH_MAX
];
606 static const char *suffix
[] = {
607 "/.git", "", ".git/.git", ".git", NULL
,
610 int len
= strlen(path
);
612 while ((1 < len
) && (path
[len
-1] == '/'))
617 strncpy(used_path
, path
, len
); used_path
[len
] = 0 ;
618 strcpy(validated_path
, used_path
);
620 if (used_path
[0] == '~') {
621 char *newpath
= expand_user_path(used_path
);
622 if (!newpath
|| (PATH_MAX
- 10 < strlen(newpath
))) {
627 * Copy back into the static buffer. A pity
628 * since newpath was not bounded, but other
629 * branches of the if are limited by PATH_MAX
632 strcpy(used_path
, newpath
); free(newpath
);
634 else if (PATH_MAX
- 10 < len
)
636 len
= strlen(used_path
);
637 for (i
= 0; suffix
[i
]; i
++) {
639 strcpy(used_path
+ len
, suffix
[i
]);
640 if (!stat(used_path
, &st
) &&
641 (S_ISREG(st
.st_mode
) ||
642 (S_ISDIR(st
.st_mode
) && is_git_directory(used_path
)))) {
643 strcat(validated_path
, suffix
[i
]);
649 gitfile
= read_gitfile(used_path
) ;
651 strcpy(used_path
, gitfile
);
652 if (chdir(used_path
))
654 path
= validated_path
;
656 else if (chdir(path
))
659 if (access("objects", X_OK
) == 0 && access("refs", X_OK
) == 0 &&
660 validate_headref("HEAD") == 0) {
662 check_repository_format();
669 static int calc_shared_perm(int mode
)
673 if (shared_repository
< 0)
674 tweak
= -shared_repository
;
676 tweak
= shared_repository
;
678 if (!(mode
& S_IWUSR
))
681 /* Copy read bits to execute bits */
682 tweak
|= (tweak
& 0444) >> 2;
683 if (shared_repository
< 0)
684 mode
= (mode
& ~0777) | tweak
;
692 int adjust_shared_perm(const char *path
)
694 int old_mode
, new_mode
;
696 if (!shared_repository
)
698 if (get_st_mode_bits(path
, &old_mode
) < 0)
701 new_mode
= calc_shared_perm(old_mode
);
702 if (S_ISDIR(old_mode
)) {
703 /* Copy read bits to execute bits */
704 new_mode
|= (new_mode
& 0444) >> 2;
705 new_mode
|= FORCE_DIR_SET_GID
;
708 if (((old_mode
^ new_mode
) & ~S_IFMT
) &&
709 chmod(path
, (new_mode
& ~S_IFMT
)) < 0)
714 static int have_same_root(const char *path1
, const char *path2
)
716 int is_abs1
, is_abs2
;
718 is_abs1
= is_absolute_path(path1
);
719 is_abs2
= is_absolute_path(path2
);
720 return (is_abs1
&& is_abs2
&& tolower(path1
[0]) == tolower(path2
[0])) ||
721 (!is_abs1
&& !is_abs2
);
725 * Give path as relative to prefix.
727 * The strbuf may or may not be used, so do not assume it contains the
730 const char *relative_path(const char *in
, const char *prefix
,
733 int in_len
= in
? strlen(in
) : 0;
734 int prefix_len
= prefix
? strlen(prefix
) : 0;
741 else if (!prefix_len
)
744 if (have_same_root(in
, prefix
)) {
745 /* bypass dos_drive, for "c:" is identical to "C:" */
746 if (has_dos_drive_prefix(in
)) {
754 while (i
< prefix_len
&& j
< in_len
&& prefix
[i
] == in
[j
]) {
755 if (is_dir_sep(prefix
[i
])) {
756 while (is_dir_sep(prefix
[i
]))
758 while (is_dir_sep(in
[j
]))
769 /* "prefix" seems like prefix of "in" */
772 * but "/foo" is not a prefix of "/foobar"
773 * (i.e. prefix not end with '/')
775 prefix_off
< prefix_len
) {
777 /* in="/a/b", prefix="/a/b" */
779 } else if (is_dir_sep(in
[j
])) {
780 /* in="/a/b/c", prefix="/a/b" */
781 while (is_dir_sep(in
[j
]))
785 /* in="/a/bbb/c", prefix="/a/b" */
789 /* "in" is short than "prefix" */
791 /* "in" not end with '/' */
793 if (is_dir_sep(prefix
[i
])) {
794 /* in="/a/b", prefix="/a/b/c/" */
795 while (is_dir_sep(prefix
[i
]))
803 if (i
>= prefix_len
) {
811 strbuf_grow(sb
, in_len
);
813 while (i
< prefix_len
) {
814 if (is_dir_sep(prefix
[i
])) {
815 strbuf_addstr(sb
, "../");
816 while (is_dir_sep(prefix
[i
]))
822 if (!is_dir_sep(prefix
[prefix_len
- 1]))
823 strbuf_addstr(sb
, "../");
825 strbuf_addstr(sb
, in
);
831 * A simpler implementation of relative_path
833 * Get relative path by removing "prefix" from "in". This function
834 * first appears in v1.5.6-1-g044bbbc, and makes git_dir shorter
835 * to increase performance when traversing the path to work_tree.
837 const char *remove_leading_path(const char *in
, const char *prefix
)
839 static char buf
[PATH_MAX
+ 1];
842 if (!prefix
|| !prefix
[0])
845 if (is_dir_sep(prefix
[i
])) {
846 if (!is_dir_sep(in
[j
]))
848 while (is_dir_sep(prefix
[i
]))
850 while (is_dir_sep(in
[j
]))
853 } else if (in
[j
] != prefix
[i
]) {
860 /* "/foo" is a prefix of "/foo" */
862 /* "/foo" is not a prefix of "/foobar" */
863 !is_dir_sep(prefix
[i
-1]) && !is_dir_sep(in
[j
])
866 while (is_dir_sep(in
[j
]))
876 * It is okay if dst == src, but they should not overlap otherwise.
878 * Performs the following normalizations on src, storing the result in dst:
879 * - Ensures that components are separated by '/' (Windows only)
880 * - Squashes sequences of '/'.
881 * - Removes "." components.
882 * - Removes ".." components, and the components the precede them.
883 * Returns failure (non-zero) if a ".." component appears as first path
884 * component anytime during the normalization. Otherwise, returns success (0).
886 * Note that this function is purely textual. It does not follow symlinks,
887 * verify the existence of the path, or make any system calls.
889 * prefix_len != NULL is for a specific case of prefix_pathspec():
890 * assume that src == dst and src[0..prefix_len-1] is already
891 * normalized, any time "../" eats up to the prefix_len part,
892 * prefix_len is reduced. In the end prefix_len is the remaining
893 * prefix that has not been overridden by user pathspec.
895 int normalize_path_copy_len(char *dst
, const char *src
, int *prefix_len
)
899 if (has_dos_drive_prefix(src
)) {
905 if (is_dir_sep(*src
)) {
907 while (is_dir_sep(*src
))
915 * A path component that begins with . could be
917 * (1) "." and ends -- ignore and terminate.
918 * (2) "./" -- ignore them, eat slash and continue.
919 * (3) ".." and ends -- strip one and terminate.
920 * (4) "../" -- strip one, eat slash and continue.
926 } else if (is_dir_sep(src
[1])) {
929 while (is_dir_sep(*src
))
932 } else if (src
[1] == '.') {
937 } else if (is_dir_sep(src
[2])) {
940 while (is_dir_sep(*src
))
947 /* copy up to the next '/', and eat all '/' */
948 while ((c
= *src
++) != '\0' && !is_dir_sep(c
))
952 while (is_dir_sep(c
))
961 * dst0..dst is prefix portion, and dst[-1] is '/';
964 dst
--; /* go to trailing '/' */
967 /* Windows: dst[-1] cannot be backslash anymore */
968 while (dst0
< dst
&& dst
[-1] != '/')
970 if (prefix_len
&& *prefix_len
> dst
- dst0
)
971 *prefix_len
= dst
- dst0
;
977 int normalize_path_copy(char *dst
, const char *src
)
979 return normalize_path_copy_len(dst
, src
, NULL
);
983 * path = Canonical absolute path
984 * prefixes = string_list containing normalized, absolute paths without
985 * trailing slashes (except for the root directory, which is denoted by "/").
987 * Determines, for each path in prefixes, whether the "prefix"
988 * is an ancestor directory of path. Returns the length of the longest
989 * ancestor directory, excluding any trailing slashes, or -1 if no prefix
990 * is an ancestor. (Note that this means 0 is returned if prefixes is
991 * ["/"].) "/foo" is not considered an ancestor of "/foobar". Directories
992 * are not considered to be their own ancestors. path must be in a
993 * canonical form: empty components, or "." or ".." components are not
996 int longest_ancestor_length(const char *path
, struct string_list
*prefixes
)
1000 if (!strcmp(path
, "/"))
1003 for (i
= 0; i
< prefixes
->nr
; i
++) {
1004 const char *ceil
= prefixes
->items
[i
].string
;
1005 int len
= strlen(ceil
);
1007 if (len
== 1 && ceil
[0] == '/')
1008 len
= 0; /* root matches anything, with length 0 */
1009 else if (!strncmp(path
, ceil
, len
) && path
[len
] == '/')
1010 ; /* match of length len */
1012 continue; /* no match */
1021 /* strip arbitrary amount of directory separators at end of path */
1022 static inline int chomp_trailing_dir_sep(const char *path
, int len
)
1024 while (len
&& is_dir_sep(path
[len
- 1]))
1030 * If path ends with suffix (complete path components), returns the
1031 * part before suffix (sans trailing directory separators).
1032 * Otherwise returns NULL.
1034 char *strip_path_suffix(const char *path
, const char *suffix
)
1036 int path_len
= strlen(path
), suffix_len
= strlen(suffix
);
1038 while (suffix_len
) {
1042 if (is_dir_sep(path
[path_len
- 1])) {
1043 if (!is_dir_sep(suffix
[suffix_len
- 1]))
1045 path_len
= chomp_trailing_dir_sep(path
, path_len
);
1046 suffix_len
= chomp_trailing_dir_sep(suffix
, suffix_len
);
1048 else if (path
[--path_len
] != suffix
[--suffix_len
])
1052 if (path_len
&& !is_dir_sep(path
[path_len
- 1]))
1054 return xstrndup(path
, chomp_trailing_dir_sep(path
, path_len
));
1057 int daemon_avoid_alias(const char *p
)
1062 * This resurrects the belts and suspenders paranoia check by HPA
1063 * done in <435560F7.4080006@zytor.com> thread, now enter_repo()
1064 * does not do getcwd() based path canonicalization.
1066 * sl becomes true immediately after seeing '/' and continues to
1067 * be true as long as dots continue after that without intervening
1068 * non-dot character.
1070 if (!p
|| (*p
!= '/' && *p
!= '~'))
1080 else if (ch
== '/') {
1082 /* reject //, /./ and /../ */
1087 if (0 < ndot
&& ndot
< 3)
1088 /* reject /.$ and /..$ */
1097 else if (ch
== '/') {
1104 static int only_spaces_and_periods(const char *path
, size_t len
, size_t skip
)
1112 if (c
!= ' ' && c
!= '.')
1118 int is_ntfs_dotgit(const char *name
)
1122 for (len
= 0; ; len
++)
1123 if (!name
[len
] || name
[len
] == '\\' || is_dir_sep(name
[len
])) {
1124 if (only_spaces_and_periods(name
, len
, 4) &&
1125 !strncasecmp(name
, ".git", 4))
1127 if (only_spaces_and_periods(name
, len
, 5) &&
1128 !strncasecmp(name
, "git~1", 5))
1130 if (name
[len
] != '\\')
1137 char *xdg_config_home(const char *filename
)
1139 const char *home
, *config_home
;
1142 config_home
= getenv("XDG_CONFIG_HOME");
1143 if (config_home
&& *config_home
)
1144 return mkpathdup("%s/git/%s", config_home
, filename
);
1146 home
= getenv("HOME");
1148 return mkpathdup("%s/.config/git/%s", home
, filename
);
1152 GIT_PATH_FUNC(git_path_cherry_pick_head
, "CHERRY_PICK_HEAD")
1153 GIT_PATH_FUNC(git_path_revert_head
, "REVERT_HEAD")
1154 GIT_PATH_FUNC(git_path_squash_msg
, "SQUASH_MSG")
1155 GIT_PATH_FUNC(git_path_merge_msg
, "MERGE_MSG")
1156 GIT_PATH_FUNC(git_path_merge_rr
, "MERGE_RR")
1157 GIT_PATH_FUNC(git_path_merge_mode
, "MERGE_MODE")
1158 GIT_PATH_FUNC(git_path_merge_head
, "MERGE_HEAD")
1159 GIT_PATH_FUNC(git_path_fetch_head
, "FETCH_HEAD")
1160 GIT_PATH_FUNC(git_path_shallow
, "shallow")