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 'git <command> -- <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, like this:\n"
96 "'git <command> [<revision>...] -- [<file>...]'", arg);
97}
99/*
101 * Verify a filename that we got as an argument for a pathspec
102 * entry. Note that a filename that begins with "-" never verifies
103 * as true, because even if such a filename were to exist, we want
104 * it to be preceded by the "--" marker (or we want the user to
105 * use a format like "./-filename")
106 *
107 * The "diagnose_misspelt_rev" is used to provide a user-friendly
108 * diagnosis when dying upon finding that "name" is not a pathname.
109 * If set to 1, the diagnosis will try to diagnose "name" as an
110 * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
111 * will only complain about an inexisting file.
112 *
113 * This function is typically called to check that a "file or rev"
114 * argument is unambiguous. In this case, the caller will want
115 * diagnose_misspelt_rev == 1 when verifying the first non-rev
116 * argument (which could have been a revision), and
117 * diagnose_misspelt_rev == 0 for the next ones (because we already
118 * saw a filename, there's not ambiguity anymore).
119 */
120void verify_filename(const char *prefix,
121 const char *arg,
122 int diagnose_misspelt_rev)
123{
124 if (*arg == '-')
125 die("bad flag '%s' used after filename", arg);
126 if (check_filename(prefix, arg))
127 return;
128 die_verify_filename(prefix, arg, diagnose_misspelt_rev);
129}
130/*
132 * Opposite of the above: the command line did not have -- marker
133 * and we parsed the arg as a refname. It should not be interpretable
134 * as a filename.
135 */
136void verify_non_filename(const char *prefix, const char *arg)
137{
138 if (!is_inside_work_tree() || is_inside_git_dir())
139 return;
140 if (*arg == '-')
141 return; /* flag */
142 if (!check_filename(prefix, arg))
143 return;
144 die("ambiguous argument '%s': both revision and filename\n"
145 "Use '--' to separate paths from revisions, like this:\n"
146 "'git <command> [<revision>...] -- [<file>...]'", arg);
147}
148/*
150 * Magic pathspec
151 *
152 * NEEDSWORK: These need to be moved to dir.h or even to a new
153 * pathspec.h when we restructure get_pathspec() users to use the
154 * "struct pathspec" interface.
155 *
156 * Possible future magic semantics include stuff like:
157 *
158 * { PATHSPEC_NOGLOB, '!', "noglob" },
159 * { PATHSPEC_ICASE, '\0', "icase" },
160 * { PATHSPEC_RECURSIVE, '*', "recursive" },
161 * { PATHSPEC_REGEXP, '\0', "regexp" },
162 *
163 */
164#define PATHSPEC_FROMTOP (1<<0)
165static struct pathspec_magic {
167 unsigned bit;
168 char mnemonic; /* this cannot be ':'! */
169 const char *name;
170} pathspec_magic[] = {
171 { PATHSPEC_FROMTOP, '/', "top" },
172};
173/*
175 * Take an element of a pathspec and check for magic signatures.
176 * Append the result to the prefix.
177 *
178 * For now, we only parse the syntax and throw out anything other than
179 * "top" magic.
180 *
181 * NEEDSWORK: This needs to be rewritten when we start migrating
182 * get_pathspec() users to use the "struct pathspec" interface. For
183 * example, a pathspec element may be marked as case-insensitive, but
184 * the prefix part must always match literally, and a single stupid
185 * string cannot express such a case.
186 */
187static const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt)
188{
189 unsigned magic = 0;
190 const char *copyfrom = elt;
191 int i;
192 if (elt[0] != ':') {
194 ; /* nothing to do */
195 } else if (elt[1] == '(') {
196 /* longhand */
197 const char *nextat;
198 for (copyfrom = elt + 2;
199 *copyfrom && *copyfrom != ')';
200 copyfrom = nextat) {
201 size_t len = strcspn(copyfrom, ",)");
202 if (copyfrom[len] == ',')
203 nextat = copyfrom + len + 1;
204 else
205 /* handle ')' and '\0' */
206 nextat = copyfrom + len;
207 if (!len)
208 continue;
209 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
210 if (strlen(pathspec_magic[i].name) == len &&
211 !strncmp(pathspec_magic[i].name, copyfrom, len)) {
212 magic |= pathspec_magic[i].bit;
213 break;
214 }
215 if (ARRAY_SIZE(pathspec_magic) <= i)
216 die("Invalid pathspec magic '%.*s' in '%s'",
217 (int) len, copyfrom, elt);
218 }
219 if (*copyfrom == ')')
220 copyfrom++;
221 } else {
222 /* shorthand */
223 for (copyfrom = elt + 1;
224 *copyfrom && *copyfrom != ':';
225 copyfrom++) {
226 char ch = *copyfrom;
227 if (!is_pathspec_magic(ch))
229 break;
230 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
231 if (pathspec_magic[i].mnemonic == ch) {
232 magic |= pathspec_magic[i].bit;
233 break;
234 }
235 if (ARRAY_SIZE(pathspec_magic) <= i)
236 die("Unimplemented pathspec magic '%c' in '%s'",
237 ch, elt);
238 }
239 if (*copyfrom == ':')
240 copyfrom++;
241 }
242 if (magic & PATHSPEC_FROMTOP)
244 return xstrdup(copyfrom);
245 else
246 return prefix_path(prefix, prefixlen, copyfrom);
247}
248const char **get_pathspec(const char *prefix, const char **pathspec)
250{
251 const char *entry = *pathspec;
252 const char **src, **dst;
253 int prefixlen;
254 if (!prefix && !entry)
256 return NULL;
257 if (!entry) {
259 static const char *spec[2];
260 spec[0] = prefix;
261 spec[1] = NULL;
262 return spec;
263 }
264 /* Otherwise we have to re-write the entries.. */
266 src = pathspec;
267 dst = pathspec;
268 prefixlen = prefix ? strlen(prefix) : 0;
269 while (*src) {
270 *(dst++) = prefix_pathspec(prefix, prefixlen, *src);
271 src++;
272 }
273 *dst = NULL;
274 if (!*pathspec)
275 return NULL;
276 return pathspec;
277}
278/*
280 * Test if it looks like we're at a git directory.
281 * We want to see:
282 *
283 * - either an objects/ directory _or_ the proper
284 * GIT_OBJECT_DIRECTORY environment variable
285 * - a refs/ directory
286 * - either a HEAD symlink or a HEAD file that is formatted as
287 * a proper "ref:", or a regular file HEAD that has a properly
288 * formatted sha1 object name.
289 */
290int is_git_directory(const char *suspect)
291{
292 char path[PATH_MAX];
293 size_t len = strlen(suspect);
294 if (PATH_MAX <= len + strlen("/objects"))
296 die("Too long path: %.*s", 60, suspect);
297 strcpy(path, suspect);
298 if (getenv(DB_ENVIRONMENT)) {
299 if (access(getenv(DB_ENVIRONMENT), X_OK))
300 return 0;
301 }
302 else {
303 strcpy(path + len, "/objects");
304 if (access(path, X_OK))
305 return 0;
306 }
307 strcpy(path + len, "/refs");
309 if (access(path, X_OK))
310 return 0;
311 strcpy(path + len, "/HEAD");
313 if (validate_headref(path))
314 return 0;
315 return 1;
317}
318int is_inside_git_dir(void)
320{
321 if (inside_git_dir < 0)
322 inside_git_dir = is_inside_dir(get_git_dir());
323 return inside_git_dir;
324}
325int is_inside_work_tree(void)
327{
328 if (inside_work_tree < 0)
329 inside_work_tree = is_inside_dir(get_git_work_tree());
330 return inside_work_tree;
331}
332void setup_work_tree(void)
334{
335 const char *work_tree, *git_dir;
336 static int initialized = 0;
337 if (initialized)
339 return;
340 work_tree = get_git_work_tree();
341 git_dir = get_git_dir();
342 if (!is_absolute_path(git_dir))
343 git_dir = real_path(get_git_dir());
344 if (!work_tree || chdir(work_tree))
345 die("This operation must be run in a work tree");
346 /*
348 * Make sure subsequent git processes find correct worktree
349 * if $GIT_WORK_TREE is set relative
350 */
351 if (getenv(GIT_WORK_TREE_ENVIRONMENT))
352 setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
353 set_git_dir(relative_path(git_dir, work_tree));
355 initialized = 1;
356}
357static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
359{
360 char repo_config[PATH_MAX+1];
361 /*
363 * git_config() can't be used here because it calls git_pathdup()
364 * to get $GIT_CONFIG/config. That call will make setup_git_env()
365 * set git_dir to ".git".
366 *
367 * We are in gitdir setup, no git dir has been found useable yet.
368 * Use a gentler version of git_config() to check if this repo
369 * is a good one.
370 */
371 snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
372 git_config_early(check_repository_format_version, NULL, repo_config);
373 if (GIT_REPO_VERSION < repository_format_version) {
374 if (!nongit_ok)
375 die ("Expected git repo version <= %d, found %d",
376 GIT_REPO_VERSION, repository_format_version);
377 warning("Expected git repo version <= %d, found %d",
378 GIT_REPO_VERSION, repository_format_version);
379 warning("Please upgrade Git");
380 *nongit_ok = -1;
381 return -1;
382 }
383 return 0;
384}
385/*
387 * Try to read the location of the git directory from the .git file,
388 * return path to git directory if found.
389 */
390const char *read_gitfile(const char *path)
391{
392 char *buf;
393 char *dir;
394 const char *slash;
395 struct stat st;
396 int fd;
397 ssize_t len;
398 if (stat(path, &st))
400 return NULL;
401 if (!S_ISREG(st.st_mode))
402 return NULL;
403 fd = open(path, O_RDONLY);
404 if (fd < 0)
405 die_errno("Error opening '%s'", path);
406 buf = xmalloc(st.st_size + 1);
407 len = read_in_full(fd, buf, st.st_size);
408 close(fd);
409 if (len != st.st_size)
410 die("Error reading %s", path);
411 buf[len] = '\0';
412 if (prefixcmp(buf, "gitdir: "))
413 die("Invalid gitfile format: %s", path);
414 while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
415 len--;
416 if (len < 9)
417 die("No path in gitfile: %s", path);
418 buf[len] = '\0';
419 dir = buf + 8;
420 if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
422 size_t pathlen = slash+1 - path;
423 size_t dirlen = pathlen + len - 8;
424 dir = xmalloc(dirlen + 1);
425 strncpy(dir, path, pathlen);
426 strncpy(dir + pathlen, buf + 8, len - 8);
427 dir[dirlen] = '\0';
428 free(buf);
429 buf = dir;
430 }
431 if (!is_git_directory(dir))
433 die("Not a git repository: %s", dir);
434 path = real_path(dir);
435 free(buf);
437 return path;
438}
439static const char *setup_explicit_git_dir(const char *gitdirenv,
441 char *cwd, int len,
442 int *nongit_ok)
443{
444 const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
445 const char *worktree;
446 char *gitfile;
447 int offset;
448 if (PATH_MAX - 40 < strlen(gitdirenv))
450 die("'$%s' too big", GIT_DIR_ENVIRONMENT);
451 gitfile = (char*)read_gitfile(gitdirenv);
453 if (gitfile) {
454 gitfile = xstrdup(gitfile);
455 gitdirenv = gitfile;
456 }
457 if (!is_git_directory(gitdirenv)) {
459 if (nongit_ok) {
460 *nongit_ok = 1;
461 free(gitfile);
462 return NULL;
463 }
464 die("Not a git repository: '%s'", gitdirenv);
465 }
466 if (check_repository_format_gently(gitdirenv, nongit_ok)) {
468 free(gitfile);
469 return NULL;
470 }
471 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
473 if (work_tree_env)
474 set_git_work_tree(work_tree_env);
475 else if (is_bare_repository_cfg > 0) {
476 if (git_work_tree_cfg) /* #22.2, #30 */
477 die("core.bare and core.worktree do not make sense");
478 /* #18, #26 */
480 set_git_dir(gitdirenv);
481 free(gitfile);
482 return NULL;
483 }
484 else if (git_work_tree_cfg) { /* #6, #14 */
485 if (is_absolute_path(git_work_tree_cfg))
486 set_git_work_tree(git_work_tree_cfg);
487 else {
488 char core_worktree[PATH_MAX];
489 if (chdir(gitdirenv))
490 die_errno("Could not chdir to '%s'", gitdirenv);
491 if (chdir(git_work_tree_cfg))
492 die_errno("Could not chdir to '%s'", git_work_tree_cfg);
493 if (!getcwd(core_worktree, PATH_MAX))
494 die_errno("Could not get directory '%s'", git_work_tree_cfg);
495 if (chdir(cwd))
496 die_errno("Could not come back to cwd");
497 set_git_work_tree(core_worktree);
498 }
499 }
500 else /* #2, #10 */
501 set_git_work_tree(".");
502 /* set_git_work_tree() must have been called by now */
504 worktree = get_git_work_tree();
505 /* both get_git_work_tree() and cwd are already normalized */
507 if (!strcmp(cwd, worktree)) { /* cwd == worktree */
508 set_git_dir(gitdirenv);
509 free(gitfile);
510 return NULL;
511 }
512 offset = dir_inside_of(cwd, worktree);
514 if (offset >= 0) { /* cwd inside worktree? */
515 set_git_dir(real_path(gitdirenv));
516 if (chdir(worktree))
517 die_errno("Could not chdir to '%s'", worktree);
518 cwd[len++] = '/';
519 cwd[len] = '\0';
520 free(gitfile);
521 return cwd + offset;
522 }
523 /* cwd outside worktree */
525 set_git_dir(gitdirenv);
526 free(gitfile);
527 return NULL;
528}
529static const char *setup_discovered_git_dir(const char *gitdir,
531 char *cwd, int offset, int len,
532 int *nongit_ok)
533{
534 if (check_repository_format_gently(gitdir, nongit_ok))
535 return NULL;
536 /* --work-tree is set without --git-dir; use discovered one */
538 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
539 if (offset != len && !is_absolute_path(gitdir))
540 gitdir = xstrdup(real_path(gitdir));
541 if (chdir(cwd))
542 die_errno("Could not come back to cwd");
543 return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
544 }
545 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
547 if (is_bare_repository_cfg > 0) {
548 set_git_dir(offset == len ? gitdir : real_path(gitdir));
549 if (chdir(cwd))
550 die_errno("Could not come back to cwd");
551 return NULL;
552 }
553 /* #0, #1, #5, #8, #9, #12, #13 */
555 set_git_work_tree(".");
556 if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
557 set_git_dir(gitdir);
558 inside_git_dir = 0;
559 inside_work_tree = 1;
560 if (offset == len)
561 return NULL;
562 /* Make "offset" point to past the '/', and add a '/' at the end */
564 offset++;
565 cwd[len++] = '/';
566 cwd[len] = 0;
567 return cwd + offset;
568}
569/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
571static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
572{
573 int root_len;
574 if (check_repository_format_gently(".", nongit_ok))
576 return NULL;
577 /* --work-tree is set without --git-dir; use discovered one */
579 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
580 const char *gitdir;
581 gitdir = offset == len ? "." : xmemdupz(cwd, offset);
583 if (chdir(cwd))
584 die_errno("Could not come back to cwd");
585 return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
586 }
587 inside_git_dir = 1;
589 inside_work_tree = 0;
590 if (offset != len) {
591 if (chdir(cwd))
592 die_errno("Cannot come back to cwd");
593 root_len = offset_1st_component(cwd);
594 cwd[offset > root_len ? offset : root_len] = '\0';
595 set_git_dir(cwd);
596 }
597 else
598 set_git_dir(".");
599 return NULL;
600}
601static const char *setup_nongit(const char *cwd, int *nongit_ok)
603{
604 if (!nongit_ok)
605 die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
606 if (chdir(cwd))
607 die_errno("Cannot come back to cwd");
608 *nongit_ok = 1;
609 return NULL;
610}
611static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len)
613{
614 struct stat buf;
615 if (stat(path, &buf)) {
616 die_errno("failed to stat '%*s%s%s'",
617 prefix_len,
618 prefix ? prefix : "",
619 prefix ? "/" : "", path);
620 }
621 return buf.st_dev;
622}
623/*
625 * We cannot decide in this function whether we are in the work tree or
626 * not, since the config can only be read _after_ this function was called.
627 */
628static const char *setup_git_directory_gently_1(int *nongit_ok)
629{
630 const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
631 static char cwd[PATH_MAX+1];
632 const char *gitdirenv, *ret;
633 char *gitfile;
634 int len, offset, offset_parent, ceil_offset;
635 dev_t current_device = 0;
636 int one_filesystem = 1;
637 /*
639 * Let's assume that we are in a git repository.
640 * If it turns out later that we are somewhere else, the value will be
641 * updated accordingly.
642 */
643 if (nongit_ok)
644 *nongit_ok = 0;
645 if (!getcwd(cwd, sizeof(cwd)-1))
647 die_errno("Unable to read current working directory");
648 offset = len = strlen(cwd);
649 /*
651 * If GIT_DIR is set explicitly, we're not going
652 * to do any discovery, but we still do repository
653 * validation.
654 */
655 gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
656 if (gitdirenv)
657 return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
658 ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs);
660 if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
661 ceil_offset = 1;
662 /*
664 * Test in the following order (relative to the cwd):
665 * - .git (file containing "gitdir: <path>")
666 * - .git/
667 * - ./ (bare)
668 * - ../.git
669 * - ../.git/
670 * - ../ (bare)
671 * - ../../.git/
672 * etc.
673 */
674 one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
675 if (one_filesystem)
676 current_device = get_device_or_die(".", NULL, 0);
677 for (;;) {
678 gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
679 if (gitfile)
680 gitdirenv = gitfile = xstrdup(gitfile);
681 else {
682 if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
683 gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
684 }
685 if (gitdirenv) {
687 ret = setup_discovered_git_dir(gitdirenv,
688 cwd, offset, len,
689 nongit_ok);
690 free(gitfile);
691 return ret;
692 }
693 free(gitfile);
694 if (is_git_directory("."))
696 return setup_bare_git_dir(cwd, offset, len, nongit_ok);
697 offset_parent = offset;
699 while (--offset_parent > ceil_offset && cwd[offset_parent] != '/');
700 if (offset_parent <= ceil_offset)
701 return setup_nongit(cwd, nongit_ok);
702 if (one_filesystem) {
703 dev_t parent_device = get_device_or_die("..", cwd, offset);
704 if (parent_device != current_device) {
705 if (nongit_ok) {
706 if (chdir(cwd))
707 die_errno("Cannot come back to cwd");
708 *nongit_ok = 1;
709 return NULL;
710 }
711 cwd[offset] = '\0';
712 die("Not a git repository (or any parent up to mount point %s)\n"
713 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
714 }
715 }
716 if (chdir("..")) {
717 cwd[offset] = '\0';
718 die_errno("Cannot change to '%s/..'", cwd);
719 }
720 offset = offset_parent;
721 }
722}
723const char *setup_git_directory_gently(int *nongit_ok)
725{
726 const char *prefix;
727 prefix = setup_git_directory_gently_1(nongit_ok);
729 if (prefix)
730 setenv("GIT_PREFIX", prefix, 1);
731 else
732 setenv("GIT_PREFIX", "", 1);
733 if (startup_info) {
735 startup_info->have_repository = !nongit_ok || !*nongit_ok;
736 startup_info->prefix = prefix;
737 }
738 return prefix;
739}
740int git_config_perm(const char *var, const char *value)
742{
743 int i;
744 char *endptr;
745 if (value == NULL)
747 return PERM_GROUP;
748 if (!strcmp(value, "umask"))
750 return PERM_UMASK;
751 if (!strcmp(value, "group"))
752 return PERM_GROUP;
753 if (!strcmp(value, "all") ||
754 !strcmp(value, "world") ||
755 !strcmp(value, "everybody"))
756 return PERM_EVERYBODY;
757 /* Parse octal numbers */
759 i = strtol(value, &endptr, 8);
760 /* If not an octal number, maybe true/false? */
762 if (*endptr != 0)
763 return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK;
764 /*
766 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
767 * a chmod value to restrict to.
768 */
769 switch (i) {
770 case PERM_UMASK: /* 0 */
771 return PERM_UMASK;
772 case OLD_PERM_GROUP: /* 1 */
773 return PERM_GROUP;
774 case OLD_PERM_EVERYBODY: /* 2 */
775 return PERM_EVERYBODY;
776 }
777 /* A filemode value was given: 0xxx */
779 if ((i & 0600) != 0600)
781 die("Problem with core.sharedRepository filemode value "
782 "(0%.3o).\nThe owner of files must always have "
783 "read and write permissions.", i);
784 /*
786 * Mask filemode value. Others can not get write permission.
787 * x flags for directories are handled separately.
788 */
789 return -(i & 0666);
790}
791int check_repository_format_version(const char *var, const char *value, void *cb)
793{
794 if (strcmp(var, "core.repositoryformatversion") == 0)
795 repository_format_version = git_config_int(var, value);
796 else if (strcmp(var, "core.sharedrepository") == 0)
797 shared_repository = git_config_perm(var, value);
798 else if (strcmp(var, "core.bare") == 0) {
799 is_bare_repository_cfg = git_config_bool(var, value);
800 if (is_bare_repository_cfg == 1)
801 inside_work_tree = -1;
802 } else if (strcmp(var, "core.worktree") == 0) {
803 if (!value)
804 return config_error_nonbool(var);
805 free(git_work_tree_cfg);
806 git_work_tree_cfg = xstrdup(value);
807 inside_work_tree = -1;
808 }
809 return 0;
810}
811int check_repository_format(void)
813{
814 return check_repository_format_gently(get_git_dir(), NULL);
815}
816/*
818 * Returns the "prefix", a path to the current working directory
819 * relative to the work tree root, or NULL, if the current working
820 * directory is not a strict subdirectory of the work tree root. The
821 * prefix always ends with a '/' character.
822 */
823const char *setup_git_directory(void)
824{
825 return setup_git_directory_gently(NULL);
826}
827const char *resolve_gitdir(const char *suspect)
829{
830 if (is_git_directory(suspect))
831 return suspect;
832 return read_gitfile(suspect);
833}