2 * Utilities for paths and pathnames
5 #include "repository.h"
7 #include "string-list.h"
10 #include "submodule-config.h"
13 static int get_st_mode_bits(const char *path
, int *mode
)
16 if (lstat(path
, &st
) < 0)
22 static char bad_path
[] = "/bad-path/";
24 static struct strbuf
*get_pathname(void)
26 static struct strbuf pathname_array
[4] = {
27 STRBUF_INIT
, STRBUF_INIT
, STRBUF_INIT
, STRBUF_INIT
30 struct strbuf
*sb
= &pathname_array
[index
];
31 index
= (index
+ 1) % ARRAY_SIZE(pathname_array
);
36 static char *cleanup_path(char *path
)
39 if (!memcmp(path
, "./", 2)) {
47 static void strbuf_cleanup_path(struct strbuf
*sb
)
49 char *path
= cleanup_path(sb
->buf
);
51 strbuf_remove(sb
, 0, path
- sb
->buf
);
54 char *mksnpath(char *buf
, size_t n
, const char *fmt
, ...)
60 len
= vsnprintf(buf
, n
, fmt
, args
);
63 strlcpy(buf
, bad_path
, n
);
66 return cleanup_path(buf
);
69 static int dir_prefix(const char *buf
, const char *dir
)
71 int len
= strlen(dir
);
72 return !strncmp(buf
, dir
, len
) &&
73 (is_dir_sep(buf
[len
]) || buf
[len
] == '\0');
76 /* $buf =~ m|$dir/+$file| but without regex */
77 static int is_dir_file(const char *buf
, const char *dir
, const char *file
)
79 int len
= strlen(dir
);
80 if (strncmp(buf
, dir
, len
) || !is_dir_sep(buf
[len
]))
82 while (is_dir_sep(buf
[len
]))
84 return !strcmp(buf
+ len
, file
);
87 static void replace_dir(struct strbuf
*buf
, int len
, const char *newdir
)
89 int newlen
= strlen(newdir
);
90 int need_sep
= (buf
->buf
[len
] && !is_dir_sep(buf
->buf
[len
])) &&
91 !is_dir_sep(newdir
[newlen
- 1]);
93 len
--; /* keep one char, to be replaced with '/' */
94 strbuf_splice(buf
, 0, len
, newdir
, newlen
);
96 buf
->buf
[newlen
] = '/';
100 /* Not considered garbage for report_linked_checkout_garbage */
101 unsigned ignore_garbage
:1;
103 /* Not common even though its parent is */
108 static struct common_dir common_list
[] = {
109 { 0, 1, 0, "branches" },
110 { 0, 1, 0, "hooks" },
112 { 0, 0, 1, "info/sparse-checkout" },
114 { 1, 1, 1, "logs/HEAD" },
115 { 0, 1, 1, "logs/refs/bisect" },
116 { 0, 1, 0, "lost-found" },
117 { 0, 1, 0, "objects" },
119 { 0, 1, 1, "refs/bisect" },
120 { 0, 1, 0, "remotes" },
121 { 0, 1, 0, "worktrees" },
122 { 0, 1, 0, "rr-cache" },
124 { 0, 0, 0, "config" },
125 { 1, 0, 0, "gc.pid" },
126 { 0, 0, 0, "packed-refs" },
127 { 0, 0, 0, "shallow" },
132 * A compressed trie. A trie node consists of zero or more characters that
133 * are common to all elements with this prefix, optionally followed by some
134 * children. If value is not NULL, the trie node is a terminal node.
136 * For example, consider the following set of strings:
142 * The trie would look like:
143 * root: len = 0, children a and d non-NULL, value = NULL.
144 * a: len = 2, contents = bc, value = (data for "abc")
145 * d: len = 2, contents = ef, children i non-NULL, value = (data for "def")
146 * i: len = 3, contents = nit, children e and i non-NULL, value = NULL
147 * e: len = 0, children all NULL, value = (data for "definite")
148 * i: len = 2, contents = on, children all NULL,
149 * value = (data for "definition")
152 struct trie
*children
[256];
158 static struct trie
*make_trie_node(const char *key
, void *value
)
160 struct trie
*new_node
= xcalloc(1, sizeof(*new_node
));
161 new_node
->len
= strlen(key
);
163 new_node
->contents
= xmalloc(new_node
->len
);
164 memcpy(new_node
->contents
, key
, new_node
->len
);
166 new_node
->value
= value
;
171 * Add a key/value pair to a trie. The key is assumed to be \0-terminated.
172 * If there was an existing value for this key, return it.
174 static void *add_to_trie(struct trie
*root
, const char *key
, void *value
)
181 /* we have reached the end of the key */
187 for (i
= 0; i
< root
->len
; i
++) {
188 if (root
->contents
[i
] == key
[i
])
192 * Split this node: child will contain this node's
195 child
= malloc(sizeof(*child
));
196 memcpy(child
->children
, root
->children
, sizeof(root
->children
));
198 child
->len
= root
->len
- i
- 1;
200 child
->contents
= xstrndup(root
->contents
+ i
+ 1,
203 child
->value
= root
->value
;
207 memset(root
->children
, 0, sizeof(root
->children
));
208 root
->children
[(unsigned char)root
->contents
[i
]] = child
;
210 /* This is the newly-added child. */
211 root
->children
[(unsigned char)key
[i
]] =
212 make_trie_node(key
+ i
+ 1, value
);
216 /* We have matched the entire compressed section */
218 child
= root
->children
[(unsigned char)key
[root
->len
]];
220 return add_to_trie(child
, key
+ root
->len
+ 1, value
);
222 child
= make_trie_node(key
+ root
->len
+ 1, value
);
223 root
->children
[(unsigned char)key
[root
->len
]] = child
;
233 typedef int (*match_fn
)(const char *unmatched
, void *data
, void *baton
);
236 * Search a trie for some key. Find the longest /-or-\0-terminated
237 * prefix of the key for which the trie contains a value. Call fn
238 * with the unmatched portion of the key and the found value, and
239 * return its return value. If there is no such prefix, return -1.
241 * The key is partially normalized: consecutive slashes are skipped.
243 * For example, consider the trie containing only [refs,
244 * refs/worktree] (both with values).
246 * | key | unmatched | val from node | return value |
247 * |-----------------|------------|---------------|--------------|
248 * | a | not called | n/a | -1 |
249 * | refs | \0 | refs | as per fn |
250 * | refs/ | / | refs | as per fn |
251 * | refs/w | /w | refs | as per fn |
252 * | refs/worktree | \0 | refs/worktree | as per fn |
253 * | refs/worktree/ | / | refs/worktree | as per fn |
254 * | refs/worktree/a | /a | refs/worktree | as per fn |
255 * |-----------------|------------|---------------|--------------|
258 static int trie_find(struct trie
*root
, const char *key
, match_fn fn
,
266 /* we have reached the end of the key */
267 if (root
->value
&& !root
->len
)
268 return fn(key
, root
->value
, baton
);
273 for (i
= 0; i
< root
->len
; i
++) {
274 /* Partial path normalization: skip consecutive slashes. */
275 if (key
[i
] == '/' && key
[i
+1] == '/') {
279 if (root
->contents
[i
] != key
[i
])
283 /* Matched the entire compressed section */
287 return fn(key
, root
->value
, baton
);
289 /* Partial path normalization: skip consecutive slashes */
290 while (key
[0] == '/' && key
[1] == '/')
293 child
= root
->children
[(unsigned char)*key
];
295 result
= trie_find(child
, key
+ 1, fn
, baton
);
299 if (result
>= 0 || (*key
!= '/' && *key
!= 0))
302 return fn(key
, root
->value
, baton
);
307 static struct trie common_trie
;
308 static int common_trie_done_setup
;
310 static void init_common_trie(void)
312 struct common_dir
*p
;
314 if (common_trie_done_setup
)
317 for (p
= common_list
; p
->dirname
; p
++)
318 add_to_trie(&common_trie
, p
->dirname
, p
);
320 common_trie_done_setup
= 1;
324 * Helper function for update_common_dir: returns 1 if the dir
327 static int check_common(const char *unmatched
, void *value
, void *baton
)
329 struct common_dir
*dir
= value
;
334 if (dir
->is_dir
&& (unmatched
[0] == 0 || unmatched
[0] == '/'))
335 return !dir
->exclude
;
337 if (!dir
->is_dir
&& unmatched
[0] == 0)
338 return !dir
->exclude
;
343 static void update_common_dir(struct strbuf
*buf
, int git_dir_len
,
344 const char *common_dir
)
346 char *base
= buf
->buf
+ git_dir_len
;
348 if (trie_find(&common_trie
, base
, check_common
, NULL
) > 0)
349 replace_dir(buf
, git_dir_len
, common_dir
);
352 void report_linked_checkout_garbage(void)
354 struct strbuf sb
= STRBUF_INIT
;
355 const struct common_dir
*p
;
358 if (!the_repository
->different_commondir
)
360 strbuf_addf(&sb
, "%s/", get_git_dir());
362 for (p
= common_list
; p
->dirname
; p
++) {
363 const char *path
= p
->dirname
;
364 if (p
->ignore_garbage
)
366 strbuf_setlen(&sb
, len
);
367 strbuf_addstr(&sb
, path
);
368 if (file_exists(sb
.buf
))
369 report_garbage(PACKDIR_FILE_GARBAGE
, sb
.buf
);
374 static void adjust_git_path(struct strbuf
*buf
, int git_dir_len
)
376 const char *base
= buf
->buf
+ git_dir_len
;
377 if (is_dir_file(base
, "info", "grafts"))
378 strbuf_splice(buf
, 0, buf
->len
,
379 get_graft_file(), strlen(get_graft_file()));
380 else if (!strcmp(base
, "index"))
381 strbuf_splice(buf
, 0, buf
->len
,
382 get_index_file(), strlen(get_index_file()));
383 else if (dir_prefix(base
, "objects"))
384 replace_dir(buf
, git_dir_len
+ 7, get_object_directory());
385 else if (git_hooks_path
&& dir_prefix(base
, "hooks"))
386 replace_dir(buf
, git_dir_len
+ 5, git_hooks_path
);
387 else if (the_repository
->different_commondir
)
388 update_common_dir(buf
, git_dir_len
, get_git_common_dir());
391 static void do_git_path(const struct worktree
*wt
, struct strbuf
*buf
,
392 const char *fmt
, va_list args
)
395 strbuf_addstr(buf
, get_worktree_git_dir(wt
));
396 if (buf
->len
&& !is_dir_sep(buf
->buf
[buf
->len
- 1]))
397 strbuf_addch(buf
, '/');
398 gitdir_len
= buf
->len
;
399 strbuf_vaddf(buf
, fmt
, args
);
400 adjust_git_path(buf
, gitdir_len
);
401 strbuf_cleanup_path(buf
);
404 char *git_path_buf(struct strbuf
*buf
, const char *fmt
, ...)
409 do_git_path(NULL
, buf
, fmt
, args
);
414 void strbuf_git_path(struct strbuf
*sb
, const char *fmt
, ...)
418 do_git_path(NULL
, sb
, fmt
, args
);
422 const char *git_path(const char *fmt
, ...)
424 struct strbuf
*pathname
= get_pathname();
427 do_git_path(NULL
, pathname
, fmt
, args
);
429 return pathname
->buf
;
432 char *git_pathdup(const char *fmt
, ...)
434 struct strbuf path
= STRBUF_INIT
;
437 do_git_path(NULL
, &path
, fmt
, args
);
439 return strbuf_detach(&path
, NULL
);
442 char *mkpathdup(const char *fmt
, ...)
444 struct strbuf sb
= STRBUF_INIT
;
447 strbuf_vaddf(&sb
, fmt
, args
);
449 strbuf_cleanup_path(&sb
);
450 return strbuf_detach(&sb
, NULL
);
453 const char *mkpath(const char *fmt
, ...)
456 struct strbuf
*pathname
= get_pathname();
458 strbuf_vaddf(pathname
, fmt
, args
);
460 return cleanup_path(pathname
->buf
);
463 const char *worktree_git_path(const struct worktree
*wt
, const char *fmt
, ...)
465 struct strbuf
*pathname
= get_pathname();
468 do_git_path(wt
, pathname
, fmt
, args
);
470 return pathname
->buf
;
473 /* Returns 0 on success, negative on failure. */
474 static int do_submodule_path(struct strbuf
*buf
, const char *path
,
475 const char *fmt
, va_list args
)
477 struct strbuf git_submodule_common_dir
= STRBUF_INIT
;
478 struct strbuf git_submodule_dir
= STRBUF_INIT
;
481 ret
= submodule_to_gitdir(&git_submodule_dir
, path
);
485 strbuf_complete(&git_submodule_dir
, '/');
486 strbuf_addbuf(buf
, &git_submodule_dir
);
487 strbuf_vaddf(buf
, fmt
, args
);
489 if (get_common_dir_noenv(&git_submodule_common_dir
, git_submodule_dir
.buf
))
490 update_common_dir(buf
, git_submodule_dir
.len
, git_submodule_common_dir
.buf
);
492 strbuf_cleanup_path(buf
);
495 strbuf_release(&git_submodule_dir
);
496 strbuf_release(&git_submodule_common_dir
);
500 char *git_pathdup_submodule(const char *path
, const char *fmt
, ...)
504 struct strbuf buf
= STRBUF_INIT
;
506 err
= do_submodule_path(&buf
, path
, fmt
, args
);
509 strbuf_release(&buf
);
512 return strbuf_detach(&buf
, NULL
);
515 int strbuf_git_path_submodule(struct strbuf
*buf
, const char *path
,
516 const char *fmt
, ...)
521 err
= do_submodule_path(buf
, path
, fmt
, args
);
527 static void do_git_common_path(const struct repository
*repo
,
532 strbuf_addstr(buf
, repo
->commondir
);
533 if (buf
->len
&& !is_dir_sep(buf
->buf
[buf
->len
- 1]))
534 strbuf_addch(buf
, '/');
535 strbuf_vaddf(buf
, fmt
, args
);
536 strbuf_cleanup_path(buf
);
539 const char *git_common_path(const char *fmt
, ...)
541 struct strbuf
*pathname
= get_pathname();
544 do_git_common_path(the_repository
, pathname
, fmt
, args
);
546 return pathname
->buf
;
549 void strbuf_git_common_path(struct strbuf
*sb
,
550 const struct repository
*repo
,
551 const char *fmt
, ...)
555 do_git_common_path(repo
, sb
, fmt
, args
);
559 int validate_headref(const char *path
)
562 char *buf
, buffer
[256];
563 unsigned char sha1
[20];
567 if (lstat(path
, &st
) < 0)
570 /* Make sure it is a "refs/.." symlink */
571 if (S_ISLNK(st
.st_mode
)) {
572 len
= readlink(path
, buffer
, sizeof(buffer
)-1);
573 if (len
>= 5 && !memcmp("refs/", buffer
, 5))
579 * Anything else, just open it and try to see if it is a symbolic ref.
581 fd
= open(path
, O_RDONLY
);
584 len
= read_in_full(fd
, buffer
, sizeof(buffer
)-1);
588 * Is it a symbolic ref?
592 if (!memcmp("ref:", buffer
, 4)) {
595 while (len
&& isspace(*buf
))
597 if (len
>= 5 && !memcmp("refs/", buf
, 5))
602 * Is this a detached HEAD?
604 if (!get_sha1_hex(buffer
, sha1
))
610 static struct passwd
*getpw_str(const char *username
, size_t len
)
613 char *username_z
= xmemdupz(username
, len
);
614 pw
= getpwnam(username_z
);
620 * Return a string with ~ and ~user expanded via getpw*. If buf != NULL,
621 * then it is a newly allocated string. Returns NULL on getpw failure or
624 * If real_home is true, real_path($HOME) is used in the expansion.
626 char *expand_user_path(const char *path
, int real_home
)
628 struct strbuf user_path
= STRBUF_INIT
;
629 const char *to_copy
= path
;
633 if (path
[0] == '~') {
634 const char *first_slash
= strchrnul(path
, '/');
635 const char *username
= path
+ 1;
636 size_t username_len
= first_slash
- username
;
637 if (username_len
== 0) {
638 const char *home
= getenv("HOME");
642 strbuf_addstr(&user_path
, real_path(home
));
644 strbuf_addstr(&user_path
, home
);
645 #ifdef GIT_WINDOWS_NATIVE
646 convert_slashes(user_path
.buf
);
649 struct passwd
*pw
= getpw_str(username
, username_len
);
652 strbuf_addstr(&user_path
, pw
->pw_dir
);
654 to_copy
= first_slash
;
656 strbuf_addstr(&user_path
, to_copy
);
657 return strbuf_detach(&user_path
, NULL
);
659 strbuf_release(&user_path
);
664 * First, one directory to try is determined by the following algorithm.
666 * (0) If "strict" is given, the path is used as given and no DWIM is
668 * (1) "~/path" to mean path under the running user's home directory;
669 * (2) "~user/path" to mean path under named user's home directory;
670 * (3) "relative/path" to mean cwd relative directory; or
671 * (4) "/absolute/path" to mean absolute directory.
673 * Unless "strict" is given, we check "%s/.git", "%s", "%s.git/.git", "%s.git"
674 * in this order. We select the first one that is a valid git repository, and
675 * chdir() to it. If none match, or we fail to chdir, we return NULL.
677 * If all goes well, we return the directory we used to chdir() (but
678 * before ~user is expanded), avoiding getcwd() resolving symbolic
679 * links. User relative paths are also returned as they are given,
680 * except DWIM suffixing.
682 const char *enter_repo(const char *path
, int strict
)
684 static struct strbuf validated_path
= STRBUF_INIT
;
685 static struct strbuf used_path
= STRBUF_INIT
;
691 static const char *suffix
[] = {
692 "/.git", "", ".git/.git", ".git", NULL
,
695 int len
= strlen(path
);
697 while ((1 < len
) && (path
[len
-1] == '/'))
701 * We can handle arbitrary-sized buffers, but this remains as a
702 * sanity check on untrusted input.
707 strbuf_reset(&used_path
);
708 strbuf_reset(&validated_path
);
709 strbuf_add(&used_path
, path
, len
);
710 strbuf_add(&validated_path
, path
, len
);
712 if (used_path
.buf
[0] == '~') {
713 char *newpath
= expand_user_path(used_path
.buf
, 0);
716 strbuf_attach(&used_path
, newpath
, strlen(newpath
),
719 for (i
= 0; suffix
[i
]; i
++) {
721 size_t baselen
= used_path
.len
;
722 strbuf_addstr(&used_path
, suffix
[i
]);
723 if (!stat(used_path
.buf
, &st
) &&
724 (S_ISREG(st
.st_mode
) ||
725 (S_ISDIR(st
.st_mode
) && is_git_directory(used_path
.buf
)))) {
726 strbuf_addstr(&validated_path
, suffix
[i
]);
729 strbuf_setlen(&used_path
, baselen
);
733 gitfile
= read_gitfile(used_path
.buf
);
735 strbuf_reset(&used_path
);
736 strbuf_addstr(&used_path
, gitfile
);
738 if (chdir(used_path
.buf
))
740 path
= validated_path
.buf
;
743 const char *gitfile
= read_gitfile(path
);
750 if (is_git_directory(".")) {
752 check_repository_format();
759 static int calc_shared_perm(int mode
)
763 if (get_shared_repository() < 0)
764 tweak
= -get_shared_repository();
766 tweak
= get_shared_repository();
768 if (!(mode
& S_IWUSR
))
771 /* Copy read bits to execute bits */
772 tweak
|= (tweak
& 0444) >> 2;
773 if (get_shared_repository() < 0)
774 mode
= (mode
& ~0777) | tweak
;
782 int adjust_shared_perm(const char *path
)
784 int old_mode
, new_mode
;
786 if (!get_shared_repository())
788 if (get_st_mode_bits(path
, &old_mode
) < 0)
791 new_mode
= calc_shared_perm(old_mode
);
792 if (S_ISDIR(old_mode
)) {
793 /* Copy read bits to execute bits */
794 new_mode
|= (new_mode
& 0444) >> 2;
795 new_mode
|= FORCE_DIR_SET_GID
;
798 if (((old_mode
^ new_mode
) & ~S_IFMT
) &&
799 chmod(path
, (new_mode
& ~S_IFMT
)) < 0)
804 void safe_create_dir(const char *dir
, int share
)
806 if (mkdir(dir
, 0777) < 0) {
807 if (errno
!= EEXIST
) {
812 else if (share
&& adjust_shared_perm(dir
))
813 die(_("Could not make %s writable by group"), dir
);
816 static int have_same_root(const char *path1
, const char *path2
)
818 int is_abs1
, is_abs2
;
820 is_abs1
= is_absolute_path(path1
);
821 is_abs2
= is_absolute_path(path2
);
822 return (is_abs1
&& is_abs2
&& tolower(path1
[0]) == tolower(path2
[0])) ||
823 (!is_abs1
&& !is_abs2
);
827 * Give path as relative to prefix.
829 * The strbuf may or may not be used, so do not assume it contains the
832 const char *relative_path(const char *in
, const char *prefix
,
835 int in_len
= in
? strlen(in
) : 0;
836 int prefix_len
= prefix
? strlen(prefix
) : 0;
843 else if (!prefix_len
)
846 if (have_same_root(in
, prefix
))
847 /* bypass dos_drive, for "c:" is identical to "C:" */
848 i
= j
= has_dos_drive_prefix(in
);
853 while (i
< prefix_len
&& j
< in_len
&& prefix
[i
] == in
[j
]) {
854 if (is_dir_sep(prefix
[i
])) {
855 while (is_dir_sep(prefix
[i
]))
857 while (is_dir_sep(in
[j
]))
868 /* "prefix" seems like prefix of "in" */
871 * but "/foo" is not a prefix of "/foobar"
872 * (i.e. prefix not end with '/')
874 prefix_off
< prefix_len
) {
876 /* in="/a/b", prefix="/a/b" */
878 } else if (is_dir_sep(in
[j
])) {
879 /* in="/a/b/c", prefix="/a/b" */
880 while (is_dir_sep(in
[j
]))
884 /* in="/a/bbb/c", prefix="/a/b" */
888 /* "in" is short than "prefix" */
890 /* "in" not end with '/' */
892 if (is_dir_sep(prefix
[i
])) {
893 /* in="/a/b", prefix="/a/b/c/" */
894 while (is_dir_sep(prefix
[i
]))
902 if (i
>= prefix_len
) {
910 strbuf_grow(sb
, in_len
);
912 while (i
< prefix_len
) {
913 if (is_dir_sep(prefix
[i
])) {
914 strbuf_addstr(sb
, "../");
915 while (is_dir_sep(prefix
[i
]))
921 if (!is_dir_sep(prefix
[prefix_len
- 1]))
922 strbuf_addstr(sb
, "../");
924 strbuf_addstr(sb
, in
);
930 * A simpler implementation of relative_path
932 * Get relative path by removing "prefix" from "in". This function
933 * first appears in v1.5.6-1-g044bbbc, and makes git_dir shorter
934 * to increase performance when traversing the path to work_tree.
936 const char *remove_leading_path(const char *in
, const char *prefix
)
938 static struct strbuf buf
= STRBUF_INIT
;
941 if (!prefix
|| !prefix
[0])
944 if (is_dir_sep(prefix
[i
])) {
945 if (!is_dir_sep(in
[j
]))
947 while (is_dir_sep(prefix
[i
]))
949 while (is_dir_sep(in
[j
]))
952 } else if (in
[j
] != prefix
[i
]) {
959 /* "/foo" is a prefix of "/foo" */
961 /* "/foo" is not a prefix of "/foobar" */
962 !is_dir_sep(prefix
[i
-1]) && !is_dir_sep(in
[j
])
965 while (is_dir_sep(in
[j
]))
970 strbuf_addstr(&buf
, ".");
972 strbuf_addstr(&buf
, in
+ j
);
977 * It is okay if dst == src, but they should not overlap otherwise.
979 * Performs the following normalizations on src, storing the result in dst:
980 * - Ensures that components are separated by '/' (Windows only)
981 * - Squashes sequences of '/' except "//server/share" on Windows
982 * - Removes "." components.
983 * - Removes ".." components, and the components the precede them.
984 * Returns failure (non-zero) if a ".." component appears as first path
985 * component anytime during the normalization. Otherwise, returns success (0).
987 * Note that this function is purely textual. It does not follow symlinks,
988 * verify the existence of the path, or make any system calls.
990 * prefix_len != NULL is for a specific case of prefix_pathspec():
991 * assume that src == dst and src[0..prefix_len-1] is already
992 * normalized, any time "../" eats up to the prefix_len part,
993 * prefix_len is reduced. In the end prefix_len is the remaining
994 * prefix that has not been overridden by user pathspec.
996 * NEEDSWORK: This function doesn't perform normalization w.r.t. trailing '/'.
997 * For everything but the root folder itself, the normalized path should not
998 * end with a '/', then the callers need to be fixed up accordingly.
1001 int normalize_path_copy_len(char *dst
, const char *src
, int *prefix_len
)
1007 * Copy initial part of absolute path: "/", "C:/", "//server/share/".
1009 end
= src
+ offset_1st_component(src
);
1018 while (is_dir_sep(*src
))
1025 * A path component that begins with . could be
1027 * (1) "." and ends -- ignore and terminate.
1028 * (2) "./" -- ignore them, eat slash and continue.
1029 * (3) ".." and ends -- strip one and terminate.
1030 * (4) "../" -- strip one, eat slash and continue.
1036 } else if (is_dir_sep(src
[1])) {
1039 while (is_dir_sep(*src
))
1042 } else if (src
[1] == '.') {
1047 } else if (is_dir_sep(src
[2])) {
1050 while (is_dir_sep(*src
))
1057 /* copy up to the next '/', and eat all '/' */
1058 while ((c
= *src
++) != '\0' && !is_dir_sep(c
))
1060 if (is_dir_sep(c
)) {
1062 while (is_dir_sep(c
))
1071 * dst0..dst is prefix portion, and dst[-1] is '/';
1074 dst
--; /* go to trailing '/' */
1077 /* Windows: dst[-1] cannot be backslash anymore */
1078 while (dst0
< dst
&& dst
[-1] != '/')
1080 if (prefix_len
&& *prefix_len
> dst
- dst0
)
1081 *prefix_len
= dst
- dst0
;
1087 int normalize_path_copy(char *dst
, const char *src
)
1089 return normalize_path_copy_len(dst
, src
, NULL
);
1093 * path = Canonical absolute path
1094 * prefixes = string_list containing normalized, absolute paths without
1095 * trailing slashes (except for the root directory, which is denoted by "/").
1097 * Determines, for each path in prefixes, whether the "prefix"
1098 * is an ancestor directory of path. Returns the length of the longest
1099 * ancestor directory, excluding any trailing slashes, or -1 if no prefix
1100 * is an ancestor. (Note that this means 0 is returned if prefixes is
1101 * ["/"].) "/foo" is not considered an ancestor of "/foobar". Directories
1102 * are not considered to be their own ancestors. path must be in a
1103 * canonical form: empty components, or "." or ".." components are not
1106 int longest_ancestor_length(const char *path
, struct string_list
*prefixes
)
1108 int i
, max_len
= -1;
1110 if (!strcmp(path
, "/"))
1113 for (i
= 0; i
< prefixes
->nr
; i
++) {
1114 const char *ceil
= prefixes
->items
[i
].string
;
1115 int len
= strlen(ceil
);
1117 if (len
== 1 && ceil
[0] == '/')
1118 len
= 0; /* root matches anything, with length 0 */
1119 else if (!strncmp(path
, ceil
, len
) && path
[len
] == '/')
1120 ; /* match of length len */
1122 continue; /* no match */
1131 /* strip arbitrary amount of directory separators at end of path */
1132 static inline int chomp_trailing_dir_sep(const char *path
, int len
)
1134 while (len
&& is_dir_sep(path
[len
- 1]))
1140 * If path ends with suffix (complete path components), returns the
1141 * part before suffix (sans trailing directory separators).
1142 * Otherwise returns NULL.
1144 char *strip_path_suffix(const char *path
, const char *suffix
)
1146 int path_len
= strlen(path
), suffix_len
= strlen(suffix
);
1148 while (suffix_len
) {
1152 if (is_dir_sep(path
[path_len
- 1])) {
1153 if (!is_dir_sep(suffix
[suffix_len
- 1]))
1155 path_len
= chomp_trailing_dir_sep(path
, path_len
);
1156 suffix_len
= chomp_trailing_dir_sep(suffix
, suffix_len
);
1158 else if (path
[--path_len
] != suffix
[--suffix_len
])
1162 if (path_len
&& !is_dir_sep(path
[path_len
- 1]))
1164 return xstrndup(path
, chomp_trailing_dir_sep(path
, path_len
));
1167 int daemon_avoid_alias(const char *p
)
1172 * This resurrects the belts and suspenders paranoia check by HPA
1173 * done in <435560F7.4080006@zytor.com> thread, now enter_repo()
1174 * does not do getcwd() based path canonicalization.
1176 * sl becomes true immediately after seeing '/' and continues to
1177 * be true as long as dots continue after that without intervening
1178 * non-dot character.
1180 if (!p
|| (*p
!= '/' && *p
!= '~'))
1190 else if (ch
== '/') {
1192 /* reject //, /./ and /../ */
1197 if (0 < ndot
&& ndot
< 3)
1198 /* reject /.$ and /..$ */
1207 else if (ch
== '/') {
1214 static int only_spaces_and_periods(const char *path
, size_t len
, size_t skip
)
1222 if (c
!= ' ' && c
!= '.')
1228 int is_ntfs_dotgit(const char *name
)
1232 for (len
= 0; ; len
++)
1233 if (!name
[len
] || name
[len
] == '\\' || is_dir_sep(name
[len
])) {
1234 if (only_spaces_and_periods(name
, len
, 4) &&
1235 !strncasecmp(name
, ".git", 4))
1237 if (only_spaces_and_periods(name
, len
, 5) &&
1238 !strncasecmp(name
, "git~1", 5))
1240 if (name
[len
] != '\\')
1247 char *xdg_config_home(const char *filename
)
1249 const char *home
, *config_home
;
1252 config_home
= getenv("XDG_CONFIG_HOME");
1253 if (config_home
&& *config_home
)
1254 return mkpathdup("%s/git/%s", config_home
, filename
);
1256 home
= getenv("HOME");
1258 return mkpathdup("%s/.config/git/%s", home
, filename
);
1262 char *xdg_cache_home(const char *filename
)
1264 const char *home
, *cache_home
;
1267 cache_home
= getenv("XDG_CACHE_HOME");
1268 if (cache_home
&& *cache_home
)
1269 return mkpathdup("%s/git/%s", cache_home
, filename
);
1271 home
= getenv("HOME");
1273 return mkpathdup("%s/.cache/git/%s", home
, filename
);
1277 GIT_PATH_FUNC(git_path_cherry_pick_head
, "CHERRY_PICK_HEAD")
1278 GIT_PATH_FUNC(git_path_revert_head
, "REVERT_HEAD")
1279 GIT_PATH_FUNC(git_path_squash_msg
, "SQUASH_MSG")
1280 GIT_PATH_FUNC(git_path_merge_msg
, "MERGE_MSG")
1281 GIT_PATH_FUNC(git_path_merge_rr
, "MERGE_RR")
1282 GIT_PATH_FUNC(git_path_merge_mode
, "MERGE_MODE")
1283 GIT_PATH_FUNC(git_path_merge_head
, "MERGE_HEAD")
1284 GIT_PATH_FUNC(git_path_fetch_head
, "FETCH_HEAD")
1285 GIT_PATH_FUNC(git_path_shallow
, "shallow")