1#include "cache.h"
2#include "dir.h"
3static int inside_git_dir = -1;
5static int inside_work_tree = -1;
6static char *prefix_path_gently(const char *prefix, int len, const char *path)
8{
9 const char *orig = path;
10 char *sanitized;
11 if (is_absolute_path(orig)) {
12 const char *temp = real_path(path);
13 sanitized = xmalloc(len + strlen(temp) + 1);
14 strcpy(sanitized, temp);
15 } else {
16 sanitized = xmalloc(len + strlen(path) + 1);
17 if (len)
18 memcpy(sanitized, prefix, len);
19 strcpy(sanitized + len, path);
20 }
21 if (normalize_path_copy(sanitized, sanitized))
22 goto error_out;
23 if (is_absolute_path(orig)) {
24 size_t root_len, len, total;
25 const char *work_tree = get_git_work_tree();
26 if (!work_tree)
27 goto error_out;
28 len = strlen(work_tree);
29 root_len = offset_1st_component(work_tree);
30 total = strlen(sanitized) + 1;
31 if (strncmp(sanitized, work_tree, len) ||
32 (len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) {
33 error_out:
34 free(sanitized);
35 return NULL;
36 }
37 if (sanitized[len] == '/')
38 len++;
39 memmove(sanitized, sanitized + len, total - len);
40 }
41 return sanitized;
42}
43char *prefix_path(const char *prefix, int len, const char *path)
45{
46 char *r = prefix_path_gently(prefix, len, path);
47 if (!r)
48 die("'%s' is outside repository", path);
49 return r;
50}
51int path_inside_repo(const char *prefix, const char *path)
53{
54 int len = prefix ? strlen(prefix) : 0;
55 char *r = prefix_path_gently(prefix, len, path);
56 if (r) {
57 free(r);
58 return 1;
59 }
60 return 0;
61}
62int check_filename(const char *prefix, const char *arg)
64{
65 const char *name;
66 struct stat st;
67 name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
69 if (!lstat(name, &st))
70 return 1; /* file exists */
71 if (errno == ENOENT || errno == ENOTDIR)
72 return 0; /* file does not exist */
73 die_errno("failed to stat '%s'", arg);
74}
75static void NORETURN die_verify_filename(const char *prefix,
77 const char *arg,
78 int diagnose_misspelt_rev)
79{
80 if (!diagnose_misspelt_rev)
81 die("%s: no such path in the working tree.\n"
82 "Use '-- <path>...' to specify paths that do not exist locally.",
83 arg);
84 /*
85 * Saying "'(icase)foo' does not exist in the index" when the
86 * user gave us ":(icase)foo" is just stupid. A magic pathspec
87 * begins with a colon and is followed by a non-alnum; do not
88 * let maybe_die_on_misspelt_object_name() even trigger.
89 */
90 if (!(arg[0] == ':' && !isalnum(arg[1])))
91 maybe_die_on_misspelt_object_name(arg, prefix);
92 /* ... or fall back the most general message. */
94 die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
95 "Use '--' to separate paths from revisions", arg);
96}
98/*
100 * Verify a filename that we got as an argument for a pathspec
101 * entry. Note that a filename that begins with "-" never verifies
102 * as true, because even if such a filename were to exist, we want
103 * it to be preceded by the "--" marker (or we want the user to
104 * use a format like "./-filename")
105 *
106 * The "diagnose_misspelt_rev" is used to provide a user-friendly
107 * diagnosis when dying upon finding that "name" is not a pathname.
108 * If set to 1, the diagnosis will try to diagnose "name" as an
109 * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
110 * will only complain about an inexisting file.
111 *
112 * This function is typically called to check that a "file or rev"
113 * argument is unambiguous. In this case, the caller will want
114 * diagnose_misspelt_rev == 1 when verifying the first non-rev
115 * argument (which could have been a revision), and
116 * diagnose_misspelt_rev == 0 for the next ones (because we already
117 * saw a filename, there's not ambiguity anymore).
118 */
119void verify_filename(const char *prefix,
120 const char *arg,
121 int diagnose_misspelt_rev)
122{
123 if (*arg == '-')
124 die("bad flag '%s' used after filename", arg);
125 if (check_filename(prefix, arg))
126 return;
127 die_verify_filename(prefix, arg, diagnose_misspelt_rev);
128}
129/*
131 * Opposite of the above: the command line did not have -- marker
132 * and we parsed the arg as a refname. It should not be interpretable
133 * as a filename.
134 */
135void verify_non_filename(const char *prefix, const char *arg)
136{
137 if (!is_inside_work_tree() || is_inside_git_dir())
138 return;
139 if (*arg == '-')
140 return; /* flag */
141 if (!check_filename(prefix, arg))
142 return;
143 die("ambiguous argument '%s': both revision and filename\n"
144 "Use '--' to separate filenames from revisions", arg);
145}
146/*
148 * Magic pathspec
149 *
150 * NEEDSWORK: These need to be moved to dir.h or even to a new
151 * pathspec.h when we restructure get_pathspec() users to use the
152 * "struct pathspec" interface.
153 *
154 * Possible future magic semantics include stuff like:
155 *
156 * { PATHSPEC_NOGLOB, '!', "noglob" },
157 * { PATHSPEC_ICASE, '\0', "icase" },
158 * { PATHSPEC_RECURSIVE, '*', "recursive" },
159 * { PATHSPEC_REGEXP, '\0', "regexp" },
160 *
161 */
162#define PATHSPEC_FROMTOP (1<<0)
163static struct pathspec_magic {
165 unsigned bit;
166 char mnemonic; /* this cannot be ':'! */
167 const char *name;
168} pathspec_magic[] = {
169 { PATHSPEC_FROMTOP, '/', "top" },
170};
171/*
173 * Take an element of a pathspec and check for magic signatures.
174 * Append the result to the prefix.
175 *
176 * For now, we only parse the syntax and throw out anything other than
177 * "top" magic.
178 *
179 * NEEDSWORK: This needs to be rewritten when we start migrating
180 * get_pathspec() users to use the "struct pathspec" interface. For
181 * example, a pathspec element may be marked as case-insensitive, but
182 * the prefix part must always match literally, and a single stupid
183 * string cannot express such a case.
184 */
185static const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt)
186{
187 unsigned magic = 0;
188 const char *copyfrom = elt;
189 int i;
190 if (elt[0] != ':') {
192 ; /* nothing to do */
193 } else if (elt[1] == '(') {
194 /* longhand */
195 const char *nextat;
196 for (copyfrom = elt + 2;
197 *copyfrom && *copyfrom != ')';
198 copyfrom = nextat) {
199 size_t len = strcspn(copyfrom, ",)");
200 if (copyfrom[len] == ')')
201 nextat = copyfrom + len;
202 else
203 nextat = copyfrom + len + 1;
204 if (!len)
205 continue;
206 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
207 if (strlen(pathspec_magic[i].name) == len &&
208 !strncmp(pathspec_magic[i].name, copyfrom, len)) {
209 magic |= pathspec_magic[i].bit;
210 break;
211 }
212 if (ARRAY_SIZE(pathspec_magic) <= i)
213 die("Invalid pathspec magic '%.*s' in '%s'",
214 (int) len, copyfrom, elt);
215 }
216 if (*copyfrom == ')')
217 copyfrom++;
218 } else {
219 /* shorthand */
220 for (copyfrom = elt + 1;
221 *copyfrom && *copyfrom != ':';
222 copyfrom++) {
223 char ch = *copyfrom;
224 if (!is_pathspec_magic(ch))
226 break;
227 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
228 if (pathspec_magic[i].mnemonic == ch) {
229 magic |= pathspec_magic[i].bit;
230 break;
231 }
232 if (ARRAY_SIZE(pathspec_magic) <= i)
233 die("Unimplemented pathspec magic '%c' in '%s'",
234 ch, elt);
235 }
236 if (*copyfrom == ':')
237 copyfrom++;
238 }
239 if (magic & PATHSPEC_FROMTOP)
241 return xstrdup(copyfrom);
242 else
243 return prefix_path(prefix, prefixlen, copyfrom);
244}
245const char **get_pathspec(const char *prefix, const char **pathspec)
247{
248 const char *entry = *pathspec;
249 const char **src, **dst;
250 int prefixlen;
251 if (!prefix && !entry)
253 return NULL;
254 if (!entry) {
256 static const char *spec[2];
257 spec[0] = prefix;
258 spec[1] = NULL;
259 return spec;
260 }
261 /* Otherwise we have to re-write the entries.. */
263 src = pathspec;
264 dst = pathspec;
265 prefixlen = prefix ? strlen(prefix) : 0;
266 while (*src) {
267 *(dst++) = prefix_pathspec(prefix, prefixlen, *src);
268 src++;
269 }
270 *dst = NULL;
271 if (!*pathspec)
272 return NULL;
273 return pathspec;
274}
275/*
277 * Test if it looks like we're at a git directory.
278 * We want to see:
279 *
280 * - either an objects/ directory _or_ the proper
281 * GIT_OBJECT_DIRECTORY environment variable
282 * - a refs/ directory
283 * - either a HEAD symlink or a HEAD file that is formatted as
284 * a proper "ref:", or a regular file HEAD that has a properly
285 * formatted sha1 object name.
286 */
287int is_git_directory(const char *suspect)
288{
289 char path[PATH_MAX];
290 size_t len = strlen(suspect);
291 if (PATH_MAX <= len + strlen("/objects"))
293 die("Too long path: %.*s", 60, suspect);
294 strcpy(path, suspect);
295 if (getenv(DB_ENVIRONMENT)) {
296 if (access(getenv(DB_ENVIRONMENT), X_OK))
297 return 0;
298 }
299 else {
300 strcpy(path + len, "/objects");
301 if (access(path, X_OK))
302 return 0;
303 }
304 strcpy(path + len, "/refs");
306 if (access(path, X_OK))
307 return 0;
308 strcpy(path + len, "/HEAD");
310 if (validate_headref(path))
311 return 0;
312 return 1;
314}
315int is_inside_git_dir(void)
317{
318 if (inside_git_dir < 0)
319 inside_git_dir = is_inside_dir(get_git_dir());
320 return inside_git_dir;
321}
322int is_inside_work_tree(void)
324{
325 if (inside_work_tree < 0)
326 inside_work_tree = is_inside_dir(get_git_work_tree());
327 return inside_work_tree;
328}
329void setup_work_tree(void)
331{
332 const char *work_tree, *git_dir;
333 static int initialized = 0;
334 if (initialized)
336 return;
337 work_tree = get_git_work_tree();
338 git_dir = get_git_dir();
339 if (!is_absolute_path(git_dir))
340 git_dir = real_path(get_git_dir());
341 if (!work_tree || chdir(work_tree))
342 die("This operation must be run in a work tree");
343 /*
345 * Make sure subsequent git processes find correct worktree
346 * if $GIT_WORK_TREE is set relative
347 */
348 if (getenv(GIT_WORK_TREE_ENVIRONMENT))
349 setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
350 set_git_dir(relative_path(git_dir, work_tree));
352 initialized = 1;
353}
354static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
356{
357 char repo_config[PATH_MAX+1];
358 /*
360 * git_config() can't be used here because it calls git_pathdup()
361 * to get $GIT_CONFIG/config. That call will make setup_git_env()
362 * set git_dir to ".git".
363 *
364 * We are in gitdir setup, no git dir has been found useable yet.
365 * Use a gentler version of git_config() to check if this repo
366 * is a good one.
367 */
368 snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
369 git_config_early(check_repository_format_version, NULL, repo_config);
370 if (GIT_REPO_VERSION < repository_format_version) {
371 if (!nongit_ok)
372 die ("Expected git repo version <= %d, found %d",
373 GIT_REPO_VERSION, repository_format_version);
374 warning("Expected git repo version <= %d, found %d",
375 GIT_REPO_VERSION, repository_format_version);
376 warning("Please upgrade Git");
377 *nongit_ok = -1;
378 return -1;
379 }
380 return 0;
381}
382/*
384 * Try to read the location of the git directory from the .git file,
385 * return path to git directory if found.
386 */
387const char *read_gitfile(const char *path)
388{
389 char *buf;
390 char *dir;
391 const char *slash;
392 struct stat st;
393 int fd;
394 ssize_t len;
395 if (stat(path, &st))
397 return NULL;
398 if (!S_ISREG(st.st_mode))
399 return NULL;
400 fd = open(path, O_RDONLY);
401 if (fd < 0)
402 die_errno("Error opening '%s'", path);
403 buf = xmalloc(st.st_size + 1);
404 len = read_in_full(fd, buf, st.st_size);
405 close(fd);
406 if (len != st.st_size)
407 die("Error reading %s", path);
408 buf[len] = '\0';
409 if (prefixcmp(buf, "gitdir: "))
410 die("Invalid gitfile format: %s", path);
411 while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
412 len--;
413 if (len < 9)
414 die("No path in gitfile: %s", path);
415 buf[len] = '\0';
416 dir = buf + 8;
417 if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
419 size_t pathlen = slash+1 - path;
420 size_t dirlen = pathlen + len - 8;
421 dir = xmalloc(dirlen + 1);
422 strncpy(dir, path, pathlen);
423 strncpy(dir + pathlen, buf + 8, len - 8);
424 dir[dirlen] = '\0';
425 free(buf);
426 buf = dir;
427 }
428 if (!is_git_directory(dir))
430 die("Not a git repository: %s", dir);
431 path = real_path(dir);
432 free(buf);
434 return path;
435}
436static const char *setup_explicit_git_dir(const char *gitdirenv,
438 char *cwd, int len,
439 int *nongit_ok)
440{
441 const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
442 const char *worktree;
443 char *gitfile;
444 int offset;
445 if (PATH_MAX - 40 < strlen(gitdirenv))
447 die("'$%s' too big", GIT_DIR_ENVIRONMENT);
448 gitfile = (char*)read_gitfile(gitdirenv);
450 if (gitfile) {
451 gitfile = xstrdup(gitfile);
452 gitdirenv = gitfile;
453 }
454 if (!is_git_directory(gitdirenv)) {
456 if (nongit_ok) {
457 *nongit_ok = 1;
458 free(gitfile);
459 return NULL;
460 }
461 die("Not a git repository: '%s'", gitdirenv);
462 }
463 if (check_repository_format_gently(gitdirenv, nongit_ok)) {
465 free(gitfile);
466 return NULL;
467 }
468 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
470 if (work_tree_env)
471 set_git_work_tree(work_tree_env);
472 else if (is_bare_repository_cfg > 0) {
473 if (git_work_tree_cfg) /* #22.2, #30 */
474 die("core.bare and core.worktree do not make sense");
475 /* #18, #26 */
477 set_git_dir(gitdirenv);
478 free(gitfile);
479 return NULL;
480 }
481 else if (git_work_tree_cfg) { /* #6, #14 */
482 if (is_absolute_path(git_work_tree_cfg))
483 set_git_work_tree(git_work_tree_cfg);
484 else {
485 char core_worktree[PATH_MAX];
486 if (chdir(gitdirenv))
487 die_errno("Could not chdir to '%s'", gitdirenv);
488 if (chdir(git_work_tree_cfg))
489 die_errno("Could not chdir to '%s'", git_work_tree_cfg);
490 if (!getcwd(core_worktree, PATH_MAX))
491 die_errno("Could not get directory '%s'", git_work_tree_cfg);
492 if (chdir(cwd))
493 die_errno("Could not come back to cwd");
494 set_git_work_tree(core_worktree);
495 }
496 }
497 else /* #2, #10 */
498 set_git_work_tree(".");
499 /* set_git_work_tree() must have been called by now */
501 worktree = get_git_work_tree();
502 /* both get_git_work_tree() and cwd are already normalized */
504 if (!strcmp(cwd, worktree)) { /* cwd == worktree */
505 set_git_dir(gitdirenv);
506 free(gitfile);
507 return NULL;
508 }
509 offset = dir_inside_of(cwd, worktree);
511 if (offset >= 0) { /* cwd inside worktree? */
512 set_git_dir(real_path(gitdirenv));
513 if (chdir(worktree))
514 die_errno("Could not chdir to '%s'", worktree);
515 cwd[len++] = '/';
516 cwd[len] = '\0';
517 free(gitfile);
518 return cwd + offset;
519 }
520 /* cwd outside worktree */
522 set_git_dir(gitdirenv);
523 free(gitfile);
524 return NULL;
525}
526static const char *setup_discovered_git_dir(const char *gitdir,
528 char *cwd, int offset, int len,
529 int *nongit_ok)
530{
531 if (check_repository_format_gently(gitdir, nongit_ok))
532 return NULL;
533 /* --work-tree is set without --git-dir; use discovered one */
535 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
536 if (offset != len && !is_absolute_path(gitdir))
537 gitdir = xstrdup(real_path(gitdir));
538 if (chdir(cwd))
539 die_errno("Could not come back to cwd");
540 return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
541 }
542 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
544 if (is_bare_repository_cfg > 0) {
545 set_git_dir(offset == len ? gitdir : real_path(gitdir));
546 if (chdir(cwd))
547 die_errno("Could not come back to cwd");
548 return NULL;
549 }
550 /* #0, #1, #5, #8, #9, #12, #13 */
552 set_git_work_tree(".");
553 if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
554 set_git_dir(gitdir);
555 inside_git_dir = 0;
556 inside_work_tree = 1;
557 if (offset == len)
558 return NULL;
559 /* Make "offset" point to past the '/', and add a '/' at the end */
561 offset++;
562 cwd[len++] = '/';
563 cwd[len] = 0;
564 return cwd + offset;
565}
566/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
568static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
569{
570 int root_len;
571 if (check_repository_format_gently(".", nongit_ok))
573 return NULL;
574 /* --work-tree is set without --git-dir; use discovered one */
576 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
577 const char *gitdir;
578 gitdir = offset == len ? "." : xmemdupz(cwd, offset);
580 if (chdir(cwd))
581 die_errno("Could not come back to cwd");
582 return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
583 }
584 inside_git_dir = 1;
586 inside_work_tree = 0;
587 if (offset != len) {
588 if (chdir(cwd))
589 die_errno("Cannot come back to cwd");
590 root_len = offset_1st_component(cwd);
591 cwd[offset > root_len ? offset : root_len] = '\0';
592 set_git_dir(cwd);
593 }
594 else
595 set_git_dir(".");
596 return NULL;
597}
598static const char *setup_nongit(const char *cwd, int *nongit_ok)
600{
601 if (!nongit_ok)
602 die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
603 if (chdir(cwd))
604 die_errno("Cannot come back to cwd");
605 *nongit_ok = 1;
606 return NULL;
607}
608static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len)
610{
611 struct stat buf;
612 if (stat(path, &buf)) {
613 die_errno("failed to stat '%*s%s%s'",
614 prefix_len,
615 prefix ? prefix : "",
616 prefix ? "/" : "", path);
617 }
618 return buf.st_dev;
619}
620/*
622 * We cannot decide in this function whether we are in the work tree or
623 * not, since the config can only be read _after_ this function was called.
624 */
625static const char *setup_git_directory_gently_1(int *nongit_ok)
626{
627 const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
628 static char cwd[PATH_MAX+1];
629 const char *gitdirenv, *ret;
630 char *gitfile;
631 int len, offset, offset_parent, ceil_offset;
632 dev_t current_device = 0;
633 int one_filesystem = 1;
634 /*
636 * Let's assume that we are in a git repository.
637 * If it turns out later that we are somewhere else, the value will be
638 * updated accordingly.
639 */
640 if (nongit_ok)
641 *nongit_ok = 0;
642 if (!getcwd(cwd, sizeof(cwd)-1))
644 die_errno("Unable to read current working directory");
645 offset = len = strlen(cwd);
646 /*
648 * If GIT_DIR is set explicitly, we're not going
649 * to do any discovery, but we still do repository
650 * validation.
651 */
652 gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
653 if (gitdirenv)
654 return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
655 ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs);
657 if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
658 ceil_offset = 1;
659 /*
661 * Test in the following order (relative to the cwd):
662 * - .git (file containing "gitdir: <path>")
663 * - .git/
664 * - ./ (bare)
665 * - ../.git
666 * - ../.git/
667 * - ../ (bare)
668 * - ../../.git/
669 * etc.
670 */
671 one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
672 if (one_filesystem)
673 current_device = get_device_or_die(".", NULL, 0);
674 for (;;) {
675 gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
676 if (gitfile)
677 gitdirenv = gitfile = xstrdup(gitfile);
678 else {
679 if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
680 gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
681 }
682 if (gitdirenv) {
684 ret = setup_discovered_git_dir(gitdirenv,
685 cwd, offset, len,
686 nongit_ok);
687 free(gitfile);
688 return ret;
689 }
690 free(gitfile);
691 if (is_git_directory("."))
693 return setup_bare_git_dir(cwd, offset, len, nongit_ok);
694 offset_parent = offset;
696 while (--offset_parent > ceil_offset && cwd[offset_parent] != '/');
697 if (offset_parent <= ceil_offset)
698 return setup_nongit(cwd, nongit_ok);
699 if (one_filesystem) {
700 dev_t parent_device = get_device_or_die("..", cwd, offset);
701 if (parent_device != current_device) {
702 if (nongit_ok) {
703 if (chdir(cwd))
704 die_errno("Cannot come back to cwd");
705 *nongit_ok = 1;
706 return NULL;
707 }
708 cwd[offset] = '\0';
709 die("Not a git repository (or any parent up to mount point %s)\n"
710 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
711 }
712 }
713 if (chdir("..")) {
714 cwd[offset] = '\0';
715 die_errno("Cannot change to '%s/..'", cwd);
716 }
717 offset = offset_parent;
718 }
719}
720const char *setup_git_directory_gently(int *nongit_ok)
722{
723 const char *prefix;
724 prefix = setup_git_directory_gently_1(nongit_ok);
726 if (prefix)
727 setenv("GIT_PREFIX", prefix, 1);
728 else
729 setenv("GIT_PREFIX", "", 1);
730 if (startup_info) {
732 startup_info->have_repository = !nongit_ok || !*nongit_ok;
733 startup_info->prefix = prefix;
734 }
735 return prefix;
736}
737int git_config_perm(const char *var, const char *value)
739{
740 int i;
741 char *endptr;
742 if (value == NULL)
744 return PERM_GROUP;
745 if (!strcmp(value, "umask"))
747 return PERM_UMASK;
748 if (!strcmp(value, "group"))
749 return PERM_GROUP;
750 if (!strcmp(value, "all") ||
751 !strcmp(value, "world") ||
752 !strcmp(value, "everybody"))
753 return PERM_EVERYBODY;
754 /* Parse octal numbers */
756 i = strtol(value, &endptr, 8);
757 /* If not an octal number, maybe true/false? */
759 if (*endptr != 0)
760 return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK;
761 /*
763 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
764 * a chmod value to restrict to.
765 */
766 switch (i) {
767 case PERM_UMASK: /* 0 */
768 return PERM_UMASK;
769 case OLD_PERM_GROUP: /* 1 */
770 return PERM_GROUP;
771 case OLD_PERM_EVERYBODY: /* 2 */
772 return PERM_EVERYBODY;
773 }
774 /* A filemode value was given: 0xxx */
776 if ((i & 0600) != 0600)
778 die("Problem with core.sharedRepository filemode value "
779 "(0%.3o).\nThe owner of files must always have "
780 "read and write permissions.", i);
781 /*
783 * Mask filemode value. Others can not get write permission.
784 * x flags for directories are handled separately.
785 */
786 return -(i & 0666);
787}
788int check_repository_format_version(const char *var, const char *value, void *cb)
790{
791 if (strcmp(var, "core.repositoryformatversion") == 0)
792 repository_format_version = git_config_int(var, value);
793 else if (strcmp(var, "core.sharedrepository") == 0)
794 shared_repository = git_config_perm(var, value);
795 else if (strcmp(var, "core.bare") == 0) {
796 is_bare_repository_cfg = git_config_bool(var, value);
797 if (is_bare_repository_cfg == 1)
798 inside_work_tree = -1;
799 } else if (strcmp(var, "core.worktree") == 0) {
800 if (!value)
801 return config_error_nonbool(var);
802 free(git_work_tree_cfg);
803 git_work_tree_cfg = xstrdup(value);
804 inside_work_tree = -1;
805 }
806 return 0;
807}
808int check_repository_format(void)
810{
811 return check_repository_format_gently(get_git_dir(), NULL);
812}
813/*
815 * Returns the "prefix", a path to the current working directory
816 * relative to the work tree root, or NULL, if the current working
817 * directory is not a strict subdirectory of the work tree root. The
818 * prefix always ends with a '/' character.
819 */
820const char *setup_git_directory(void)
821{
822 return setup_git_directory_gently(NULL);
823}
824const char *resolve_gitdir(const char *suspect)
826{
827 if (is_git_directory(suspect))
828 return suspect;
829 return read_gitfile(suspect);
830}