3 #include "string-list.h"
5 static int inside_git_dir = -1;
6 static int inside_work_tree = -1;
7 static int work_tree_config_is_bogus;
10 * The input parameter must contain an absolute path, and it must already be
13 * Find the part of an absolute path that lies inside the work tree by
14 * dereferencing symlinks outside the work tree, for example:
15 * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file
16 * /dir/file (work tree is /) -> dir/file
17 * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2
18 * /dir/repolink/file (repolink points to /dir/repo) -> file
19 * /dir/repo (exactly equal to work tree) -> (empty string)
21 static int abspath_part_inside_repo(char *path)
27 const char *work_tree = get_git_work_tree();
31 wtlen = strlen(work_tree);
33 off = offset_1st_component(path);
35 /* check if work tree is already the prefix */
36 if (wtlen <= len && !strncmp(path, work_tree, wtlen)) {
37 if (path[wtlen] == '/') {
38 memmove(path, path + wtlen + 1, len - wtlen);
40 } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') {
41 /* work tree is the root, or the whole path */
42 memmove(path, path + wtlen, len - wtlen + 1);
45 /* work tree might match beginning of a symlink to work tree */
51 /* check each '/'-terminated level */
56 if (strcmp(real_path(path0), work_tree) == 0) {
57 memmove(path0, path + 1, len - (path - path0));
64 /* check whole path */
65 if (strcmp(real_path(path0), work_tree) == 0) {
74 * Normalize "path", prepending the "prefix" for relative paths. If
75 * remaining_prefix is not NULL, return the actual prefix still
76 * remains in the path. For example, prefix = sub1/sub2/ and path is
78 * foo -> sub1/sub2/foo (full prefix)
79 * ../foo -> sub1/foo (remaining prefix is sub1/)
80 * ../../bar -> bar (no remaining prefix)
81 * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix)
82 * `pwd`/../bar -> sub1/bar (no remaining prefix)
84 char *prefix_path_gently(const char *prefix, int len,
85 int *remaining_prefix, const char *path)
87 const char *orig = path;
89 if (is_absolute_path(orig)) {
90 sanitized = xmallocz(strlen(path));
92 *remaining_prefix = 0;
93 if (normalize_path_copy_len(sanitized, path, remaining_prefix)) {
97 if (abspath_part_inside_repo(sanitized)) {
102 sanitized = xstrfmt("%.*s%s", len, prefix, path);
103 if (remaining_prefix)
104 *remaining_prefix = len;
105 if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) {
113 char *prefix_path(const char *prefix, int len, const char *path)
115 char *r = prefix_path_gently(prefix, len, NULL, path);
117 die("'%s' is outside repository", path);
121 int path_inside_repo(const char *prefix, const char *path)
123 int len = prefix ? strlen(prefix) : 0;
124 char *r = prefix_path_gently(prefix, len, NULL, path);
132 int check_filename(const char *prefix, const char *arg)
137 if (starts_with(arg, ":/")) {
138 if (arg[2] == '\0') /* ":/" is root dir, always exists */
142 name = prefix_filename(prefix, strlen(prefix), arg);
145 if (!lstat(name, &st))
146 return 1; /* file exists */
147 if (errno == ENOENT || errno == ENOTDIR)
148 return 0; /* file does not exist */
149 die_errno("failed to stat '%s'", arg);
152 static void NORETURN die_verify_filename(const char *prefix,
154 int diagnose_misspelt_rev)
156 if (!diagnose_misspelt_rev)
157 die("%s: no such path in the working tree.\n"
158 "Use 'git <command> -- <path>...' to specify paths that do not exist locally.",
161 * Saying "'(icase)foo' does not exist in the index" when the
162 * user gave us ":(icase)foo" is just stupid. A magic pathspec
163 * begins with a colon and is followed by a non-alnum; do not
164 * let maybe_die_on_misspelt_object_name() even trigger.
166 if (!(arg[0] == ':' && !isalnum(arg[1])))
167 maybe_die_on_misspelt_object_name(arg, prefix);
169 /* ... or fall back the most general message. */
170 die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
171 "Use '--' to separate paths from revisions, like this:\n"
172 "'git <command> [<revision>...] -- [<file>...]'", arg);
177 * Verify a filename that we got as an argument for a pathspec
178 * entry. Note that a filename that begins with "-" never verifies
179 * as true, because even if such a filename were to exist, we want
180 * it to be preceded by the "--" marker (or we want the user to
181 * use a format like "./-filename")
183 * The "diagnose_misspelt_rev" is used to provide a user-friendly
184 * diagnosis when dying upon finding that "name" is not a pathname.
185 * If set to 1, the diagnosis will try to diagnose "name" as an
186 * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
187 * will only complain about an inexisting file.
189 * This function is typically called to check that a "file or rev"
190 * argument is unambiguous. In this case, the caller will want
191 * diagnose_misspelt_rev == 1 when verifying the first non-rev
192 * argument (which could have been a revision), and
193 * diagnose_misspelt_rev == 0 for the next ones (because we already
194 * saw a filename, there's not ambiguity anymore).
196 void verify_filename(const char *prefix,
198 int diagnose_misspelt_rev)
201 die("bad flag '%s' used after filename", arg);
202 if (check_filename(prefix, arg) || !no_wildcard(arg))
204 die_verify_filename(prefix, arg, diagnose_misspelt_rev);
208 * Opposite of the above: the command line did not have -- marker
209 * and we parsed the arg as a refname. It should not be interpretable
212 void verify_non_filename(const char *prefix, const char *arg)
214 if (!is_inside_work_tree() || is_inside_git_dir())
218 if (!check_filename(prefix, arg))
220 die("ambiguous argument '%s': both revision and filename\n"
221 "Use '--' to separate paths from revisions, like this:\n"
222 "'git <command> [<revision>...] -- [<file>...]'", arg);
225 int get_common_dir(struct strbuf *sb, const char *gitdir)
227 const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT);
228 if (git_env_common_dir) {
229 strbuf_addstr(sb, git_env_common_dir);
232 return get_common_dir_noenv(sb, gitdir);
236 int get_common_dir_noenv(struct strbuf *sb, const char *gitdir)
238 struct strbuf data = STRBUF_INIT;
239 struct strbuf path = STRBUF_INIT;
242 strbuf_addf(&path, "%s/commondir", gitdir);
243 if (file_exists(path.buf)) {
244 if (strbuf_read_file(&data, path.buf, 0) <= 0)
245 die_errno(_("failed to read %s"), path.buf);
246 while (data.len && (data.buf[data.len - 1] == '\n' ||
247 data.buf[data.len - 1] == '\r'))
249 data.buf[data.len] = '\0';
251 if (!is_absolute_path(data.buf))
252 strbuf_addf(&path, "%s/", gitdir);
253 strbuf_addbuf(&path, &data);
254 strbuf_addstr(sb, real_path(path.buf));
257 strbuf_addstr(sb, gitdir);
258 strbuf_release(&data);
259 strbuf_release(&path);
264 * Test if it looks like we're at a git directory.
267 * - either an objects/ directory _or_ the proper
268 * GIT_OBJECT_DIRECTORY environment variable
269 * - a refs/ directory
270 * - either a HEAD symlink or a HEAD file that is formatted as
271 * a proper "ref:", or a regular file HEAD that has a properly
272 * formatted sha1 object name.
274 int is_git_directory(const char *suspect)
276 struct strbuf path = STRBUF_INIT;
280 /* Check worktree-related signatures */
281 strbuf_addf(&path, "%s/HEAD", suspect);
282 if (validate_headref(path.buf))
286 get_common_dir(&path, suspect);
289 /* Check non-worktree-related signatures */
290 if (getenv(DB_ENVIRONMENT)) {
291 if (access(getenv(DB_ENVIRONMENT), X_OK))
295 strbuf_setlen(&path, len);
296 strbuf_addstr(&path, "/objects");
297 if (access(path.buf, X_OK))
301 strbuf_setlen(&path, len);
302 strbuf_addstr(&path, "/refs");
303 if (access(path.buf, X_OK))
308 strbuf_release(&path);
312 int is_nonbare_repository_dir(struct strbuf *path)
316 size_t orig_path_len = path->len;
317 assert(orig_path_len != 0);
318 strbuf_complete(path, '/');
319 strbuf_addstr(path, ".git");
320 if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf))
322 if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED ||
323 gitfile_error == READ_GITFILE_ERR_READ_FAILED)
325 strbuf_setlen(path, orig_path_len);
329 int is_inside_git_dir(void)
331 if (inside_git_dir < 0)
332 inside_git_dir = is_inside_dir(get_git_dir());
333 return inside_git_dir;
336 int is_inside_work_tree(void)
338 if (inside_work_tree < 0)
339 inside_work_tree = is_inside_dir(get_git_work_tree());
340 return inside_work_tree;
343 void setup_work_tree(void)
345 const char *work_tree, *git_dir;
346 static int initialized = 0;
351 if (work_tree_config_is_bogus)
352 die("unable to set up work tree using invalid config");
354 work_tree = get_git_work_tree();
355 git_dir = get_git_dir();
356 if (!is_absolute_path(git_dir))
357 git_dir = real_path(get_git_dir());
358 if (!work_tree || chdir(work_tree))
359 die("This operation must be run in a work tree");
362 * Make sure subsequent git processes find correct worktree
363 * if $GIT_WORK_TREE is set relative
365 if (getenv(GIT_WORK_TREE_ENVIRONMENT))
366 setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
368 set_git_dir(remove_leading_path(git_dir, work_tree));
372 static int check_repo_format(const char *var, const char *value, void *vdata)
374 struct repository_format *data = vdata;
377 if (strcmp(var, "core.repositoryformatversion") == 0)
378 data->version = git_config_int(var, value);
379 else if (skip_prefix(var, "extensions.", &ext)) {
381 * record any known extensions here; otherwise,
382 * we fall through to recording it as unknown, and
383 * check_repository_format will complain
385 if (!strcmp(ext, "noop"))
387 else if (!strcmp(ext, "preciousobjects"))
388 data->precious_objects = git_config_bool(var, value);
390 string_list_append(&data->unknown_extensions, ext);
395 static int read_repository_format_1(struct repository_format *, config_fn_t,
398 static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
400 struct strbuf sb = STRBUF_INIT;
401 struct strbuf err = STRBUF_INIT;
402 struct repository_format candidate;
405 if (get_common_dir(&sb, gitdir))
406 fn = check_repo_format;
408 fn = check_repository_format_version;
410 strbuf_addstr(&sb, "/config");
411 read_repository_format_1(&candidate, fn, sb.buf);
415 * For historical use of check_repository_format() in git-init,
416 * we treat a missing config as a silent "ok", even when nongit_ok
419 if (candidate.version < 0)
422 if (verify_repository_format(&candidate, &err) < 0) {
424 warning("%s", err.buf);
425 strbuf_release(&err);
432 repository_format_version = candidate.version;
433 repository_format_precious_objects = candidate.precious_objects;
434 string_list_clear(&candidate.unknown_extensions, 0);
435 if (candidate.is_bare != -1) {
436 is_bare_repository_cfg = candidate.is_bare;
437 if (is_bare_repository_cfg == 1)
438 inside_work_tree = -1;
440 if (candidate.work_tree) {
441 free(git_work_tree_cfg);
442 git_work_tree_cfg = candidate.work_tree;
443 inside_work_tree = -1;
449 static int read_repository_format_1(struct repository_format *format,
450 config_fn_t fn, const char *path)
452 memset(format, 0, sizeof(*format));
453 format->version = -1;
454 format->is_bare = -1;
455 string_list_init(&format->unknown_extensions, 1);
456 git_config_from_file(fn, path, format);
457 return format->version;
460 int read_repository_format(struct repository_format *format, const char *path)
462 return read_repository_format_1(format, check_repository_format_version, path);
465 int verify_repository_format(const struct repository_format *format,
468 if (GIT_REPO_VERSION_READ < format->version) {
469 strbuf_addf(err, "Expected git repo version <= %d, found %d",
470 GIT_REPO_VERSION_READ, format->version);
474 if (format->version >= 1 && format->unknown_extensions.nr) {
477 strbuf_addstr(err, "unknown repository extensions found:");
479 for (i = 0; i < format->unknown_extensions.nr; i++)
480 strbuf_addf(err, "\n\t%s",
481 format->unknown_extensions.items[i].string);
489 * Try to read the location of the git directory from the .git file,
490 * return path to git directory if found.
492 * On failure, if return_error_code is not NULL, return_error_code
493 * will be set to an error code and NULL will be returned. If
494 * return_error_code is NULL the function will die instead (for most
497 const char *read_gitfile_gently(const char *path, int *return_error_code)
499 const int max_file_size = 1 << 20; /* 1MB */
508 if (stat(path, &st)) {
509 error_code = READ_GITFILE_ERR_STAT_FAILED;
512 if (!S_ISREG(st.st_mode)) {
513 error_code = READ_GITFILE_ERR_NOT_A_FILE;
516 if (st.st_size > max_file_size) {
517 error_code = READ_GITFILE_ERR_TOO_LARGE;
520 fd = open(path, O_RDONLY);
522 error_code = READ_GITFILE_ERR_OPEN_FAILED;
525 buf = xmallocz(st.st_size);
526 len = read_in_full(fd, buf, st.st_size);
528 if (len != st.st_size) {
529 error_code = READ_GITFILE_ERR_READ_FAILED;
532 if (!starts_with(buf, "gitdir: ")) {
533 error_code = READ_GITFILE_ERR_INVALID_FORMAT;
536 while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
539 error_code = READ_GITFILE_ERR_NO_PATH;
545 if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
546 size_t pathlen = slash+1 - path;
547 dir = xstrfmt("%.*s%.*s", (int)pathlen, path,
548 (int)(len - 8), buf + 8);
552 if (!is_git_directory(dir)) {
553 error_code = READ_GITFILE_ERR_NOT_A_REPO;
556 path = real_path(dir);
559 if (return_error_code)
560 *return_error_code = error_code;
561 else if (error_code) {
562 switch (error_code) {
563 case READ_GITFILE_ERR_STAT_FAILED:
564 case READ_GITFILE_ERR_NOT_A_FILE:
565 /* non-fatal; follow return path */
567 case READ_GITFILE_ERR_OPEN_FAILED:
568 die_errno("Error opening '%s'", path);
569 case READ_GITFILE_ERR_TOO_LARGE:
570 die("Too large to be a .git file: '%s'", path);
571 case READ_GITFILE_ERR_READ_FAILED:
572 die("Error reading %s", path);
573 case READ_GITFILE_ERR_INVALID_FORMAT:
574 die("Invalid gitfile format: %s", path);
575 case READ_GITFILE_ERR_NO_PATH:
576 die("No path in gitfile: %s", path);
577 case READ_GITFILE_ERR_NOT_A_REPO:
578 die("Not a git repository: %s", dir);
585 return error_code ? NULL : path;
588 static const char *setup_explicit_git_dir(const char *gitdirenv,
592 const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
593 const char *worktree;
597 if (PATH_MAX - 40 < strlen(gitdirenv))
598 die("'$%s' too big", GIT_DIR_ENVIRONMENT);
600 gitfile = (char*)read_gitfile(gitdirenv);
602 gitfile = xstrdup(gitfile);
606 if (!is_git_directory(gitdirenv)) {
612 die("Not a git repository: '%s'", gitdirenv);
615 if (check_repository_format_gently(gitdirenv, nongit_ok)) {
620 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
622 set_git_work_tree(work_tree_env);
623 else if (is_bare_repository_cfg > 0) {
624 if (git_work_tree_cfg) {
626 warning("core.bare and core.worktree do not make sense");
627 work_tree_config_is_bogus = 1;
631 set_git_dir(gitdirenv);
635 else if (git_work_tree_cfg) { /* #6, #14 */
636 if (is_absolute_path(git_work_tree_cfg))
637 set_git_work_tree(git_work_tree_cfg);
640 if (chdir(gitdirenv))
641 die_errno("Could not chdir to '%s'", gitdirenv);
642 if (chdir(git_work_tree_cfg))
643 die_errno("Could not chdir to '%s'", git_work_tree_cfg);
644 core_worktree = xgetcwd();
646 die_errno("Could not come back to cwd");
647 set_git_work_tree(core_worktree);
651 else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) {
653 set_git_dir(gitdirenv);
658 set_git_work_tree(".");
660 /* set_git_work_tree() must have been called by now */
661 worktree = get_git_work_tree();
663 /* both get_git_work_tree() and cwd are already normalized */
664 if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */
665 set_git_dir(gitdirenv);
670 offset = dir_inside_of(cwd->buf, worktree);
671 if (offset >= 0) { /* cwd inside worktree? */
672 set_git_dir(real_path(gitdirenv));
674 die_errno("Could not chdir to '%s'", worktree);
675 strbuf_addch(cwd, '/');
677 return cwd->buf + offset;
680 /* cwd outside worktree */
681 set_git_dir(gitdirenv);
686 static const char *setup_discovered_git_dir(const char *gitdir,
687 struct strbuf *cwd, int offset,
690 if (check_repository_format_gently(gitdir, nongit_ok))
693 /* --work-tree is set without --git-dir; use discovered one */
694 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
695 if (offset != cwd->len && !is_absolute_path(gitdir))
696 gitdir = xstrdup(real_path(gitdir));
698 die_errno("Could not come back to cwd");
699 return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
702 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
703 if (is_bare_repository_cfg > 0) {
704 set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir));
706 die_errno("Could not come back to cwd");
710 /* #0, #1, #5, #8, #9, #12, #13 */
711 set_git_work_tree(".");
712 if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
715 inside_work_tree = 1;
716 if (offset == cwd->len)
719 /* Make "offset" point to past the '/', and add a '/' at the end */
721 strbuf_addch(cwd, '/');
722 return cwd->buf + offset;
725 /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
726 static const char *setup_bare_git_dir(struct strbuf *cwd, int offset,
731 if (check_repository_format_gently(".", nongit_ok))
734 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
736 /* --work-tree is set without --git-dir; use discovered one */
737 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
740 gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset);
742 die_errno("Could not come back to cwd");
743 return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
747 inside_work_tree = 0;
748 if (offset != cwd->len) {
750 die_errno("Cannot come back to cwd");
751 root_len = offset_1st_component(cwd->buf);
752 strbuf_setlen(cwd, offset > root_len ? offset : root_len);
753 set_git_dir(cwd->buf);
760 static const char *setup_nongit(const char *cwd, int *nongit_ok)
763 die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
765 die_errno("Cannot come back to cwd");
770 static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len)
773 if (stat(path, &buf)) {
774 die_errno("failed to stat '%*s%s%s'",
776 prefix ? prefix : "",
777 prefix ? "/" : "", path);
783 * A "string_list_each_func_t" function that canonicalizes an entry
784 * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or
785 * discards it if unusable. The presence of an empty entry in
786 * GIT_CEILING_DIRECTORIES turns off canonicalization for all
787 * subsequent entries.
789 static int canonicalize_ceiling_entry(struct string_list_item *item,
792 int *empty_entry_found = cb_data;
793 char *ceil = item->string;
796 *empty_entry_found = 1;
798 } else if (!is_absolute_path(ceil)) {
800 } else if (*empty_entry_found) {
801 /* Keep entry but do not canonicalize it */
804 const char *real_path = real_path_if_valid(ceil);
808 item->string = xstrdup(real_path);
814 * We cannot decide in this function whether we are in the work tree or
815 * not, since the config can only be read _after_ this function was called.
817 static const char *setup_git_directory_gently_1(int *nongit_ok)
819 const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
820 struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
821 static struct strbuf cwd = STRBUF_INIT;
822 const char *gitdirenv, *ret;
824 int offset, offset_parent, ceil_offset = -1;
825 dev_t current_device = 0;
826 int one_filesystem = 1;
829 * We may have read an incomplete configuration before
830 * setting-up the git directory. If so, clear the cache so
831 * that the next queries to the configuration reload complete
832 * configuration (including the per-repo config file that we
833 * ignored previously).
838 * Let's assume that we are in a git repository.
839 * If it turns out later that we are somewhere else, the value will be
840 * updated accordingly.
845 if (strbuf_getcwd(&cwd))
846 die_errno("Unable to read current working directory");
850 * If GIT_DIR is set explicitly, we're not going
851 * to do any discovery, but we still do repository
854 gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
856 return setup_explicit_git_dir(gitdirenv, &cwd, nongit_ok);
858 if (env_ceiling_dirs) {
859 int empty_entry_found = 0;
861 string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1);
862 filter_string_list(&ceiling_dirs, 0,
863 canonicalize_ceiling_entry, &empty_entry_found);
864 ceil_offset = longest_ancestor_length(cwd.buf, &ceiling_dirs);
865 string_list_clear(&ceiling_dirs, 0);
868 if (ceil_offset < 0 && has_dos_drive_prefix(cwd.buf))
872 * Test in the following order (relative to the cwd):
873 * - .git (file containing "gitdir: <path>")
882 one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
884 current_device = get_device_or_die(".", NULL, 0);
886 gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
888 gitdirenv = gitfile = xstrdup(gitfile);
890 if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
891 gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
895 ret = setup_discovered_git_dir(gitdirenv,
903 if (is_git_directory("."))
904 return setup_bare_git_dir(&cwd, offset, nongit_ok);
906 offset_parent = offset;
907 while (--offset_parent > ceil_offset && cwd.buf[offset_parent] != '/');
908 if (offset_parent <= ceil_offset)
909 return setup_nongit(cwd.buf, nongit_ok);
910 if (one_filesystem) {
911 dev_t parent_device = get_device_or_die("..", cwd.buf,
913 if (parent_device != current_device) {
916 die_errno("Cannot come back to cwd");
920 strbuf_setlen(&cwd, offset);
921 die("Not a git repository (or any parent up to mount point %s)\n"
922 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).",
927 strbuf_setlen(&cwd, offset);
928 die_errno("Cannot change to '%s/..'", cwd.buf);
930 offset = offset_parent;
934 const char *setup_git_directory_gently(int *nongit_ok)
938 prefix = setup_git_directory_gently_1(nongit_ok);
940 setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1);
942 setenv(GIT_PREFIX_ENVIRONMENT, "", 1);
945 startup_info->have_repository = !nongit_ok || !*nongit_ok;
946 startup_info->prefix = prefix;
951 int git_config_perm(const char *var, const char *value)
959 if (!strcmp(value, "umask"))
961 if (!strcmp(value, "group"))
963 if (!strcmp(value, "all") ||
964 !strcmp(value, "world") ||
965 !strcmp(value, "everybody"))
966 return PERM_EVERYBODY;
968 /* Parse octal numbers */
969 i = strtol(value, &endptr, 8);
971 /* If not an octal number, maybe true/false? */
973 return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK;
976 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
977 * a chmod value to restrict to.
980 case PERM_UMASK: /* 0 */
982 case OLD_PERM_GROUP: /* 1 */
984 case OLD_PERM_EVERYBODY: /* 2 */
985 return PERM_EVERYBODY;
988 /* A filemode value was given: 0xxx */
990 if ((i & 0600) != 0600)
991 die("Problem with core.sharedRepository filemode value "
992 "(0%.3o).\nThe owner of files must always have "
993 "read and write permissions.", i);
996 * Mask filemode value. Others can not get write permission.
997 * x flags for directories are handled separately.
1002 int check_repository_format_version(const char *var, const char *value, void *cb)
1004 struct repository_format *data = cb;
1005 int ret = check_repo_format(var, value, cb);
1008 if (strcmp(var, "core.bare") == 0) {
1009 data->is_bare = git_config_bool(var, value);
1010 } else if (strcmp(var, "core.worktree") == 0) {
1012 return config_error_nonbool(var);
1013 data->work_tree = xstrdup(value);
1018 void check_repository_format(void)
1020 check_repository_format_gently(get_git_dir(), NULL);
1024 * Returns the "prefix", a path to the current working directory
1025 * relative to the work tree root, or NULL, if the current working
1026 * directory is not a strict subdirectory of the work tree root. The
1027 * prefix always ends with a '/' character.
1029 const char *setup_git_directory(void)
1031 return setup_git_directory_gently(NULL);
1034 const char *resolve_gitdir(const char *suspect)
1036 if (is_git_directory(suspect))
1038 return read_gitfile(suspect);
1041 /* if any standard file descriptor is missing open it to /dev/null */
1042 void sanitize_stdfds(void)
1044 int fd = open("/dev/null", O_RDWR, 0);
1045 while (fd != -1 && fd < 2)
1048 die_errno("open /dev/null or dup failed");
1055 #ifdef NO_POSIX_GOODIES
1063 die_errno("fork failed");
1068 die_errno("setsid failed");