1#include "cache.h"
2#include "dir.h"
3static int inside_git_dir = -1;
5static int inside_work_tree = -1;
6char *prefix_path(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 die("'%s' is outside repository", orig);
35 }
36 if (sanitized[len] == '/')
37 len++;
38 memmove(sanitized, sanitized + len, total - len);
39 }
40 return sanitized;
41}
42/*
44 * Unlike prefix_path, this should be used if the named file does
45 * not have to interact with index entry; i.e. name of a random file
46 * on the filesystem.
47 */
48const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
49{
50 static char path[PATH_MAX];
51#ifndef WIN32
52 if (!pfx_len || is_absolute_path(arg))
53 return arg;
54 memcpy(path, pfx, pfx_len);
55 strcpy(path + pfx_len, arg);
56#else
57 char *p;
58 /* don't add prefix to absolute paths, but still replace '\' by '/' */
59 if (is_absolute_path(arg))
60 pfx_len = 0;
61 else if (pfx_len)
62 memcpy(path, pfx, pfx_len);
63 strcpy(path + pfx_len, arg);
64 for (p = path + pfx_len; *p; p++)
65 if (*p == '\\')
66 *p = '/';
67#endif
68 return path;
69}
70int check_filename(const char *prefix, const char *arg)
72{
73 const char *name;
74 struct stat st;
75 name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
77 if (!lstat(name, &st))
78 return 1; /* file exists */
79 if (errno == ENOENT || errno == ENOTDIR)
80 return 0; /* file does not exist */
81 die_errno("failed to stat '%s'", arg);
82}
83static void NORETURN die_verify_filename(const char *prefix, const char *arg)
85{
86 unsigned char sha1[20];
87 unsigned mode;
88 /*
90 * Saying "'(icase)foo' does not exist in the index" when the
91 * user gave us ":(icase)foo" is just stupid. A magic pathspec
92 * begins with a colon and is followed by a non-alnum; do not
93 * let get_sha1_with_mode_1(only_to_die=1) to even trigger.
94 */
95 if (!(arg[0] == ':' && !isalnum(arg[1])))
96 /* try a detailed diagnostic ... */
97 get_sha1_with_mode_1(arg, sha1, &mode, 1, prefix);
98 /* ... or fall back the most general message. */
100 die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
101 "Use '--' to separate paths from revisions", arg);
102}
104/*
106 * Verify a filename that we got as an argument for a pathspec
107 * entry. Note that a filename that begins with "-" never verifies
108 * as true, because even if such a filename were to exist, we want
109 * it to be preceded by the "--" marker (or we want the user to
110 * use a format like "./-filename")
111 */
112void verify_filename(const char *prefix, const char *arg)
113{
114 if (*arg == '-')
115 die("bad flag '%s' used after filename", arg);
116 if (check_filename(prefix, arg))
117 return;
118 die_verify_filename(prefix, arg);
119}
120/*
122 * Opposite of the above: the command line did not have -- marker
123 * and we parsed the arg as a refname. It should not be interpretable
124 * as a filename.
125 */
126void verify_non_filename(const char *prefix, const char *arg)
127{
128 if (!is_inside_work_tree() || is_inside_git_dir())
129 return;
130 if (*arg == '-')
131 return; /* flag */
132 if (!check_filename(prefix, arg))
133 return;
134 die("ambiguous argument '%s': both revision and filename\n"
135 "Use '--' to separate filenames from revisions", arg);
136}
137/*
139 * Magic pathspec
140 *
141 * NEEDSWORK: These need to be moved to dir.h or even to a new
142 * pathspec.h when we restructure get_pathspec() users to use the
143 * "struct pathspec" interface.
144 *
145 * Possible future magic semantics include stuff like:
146 *
147 * { PATHSPEC_NOGLOB, '!', "noglob" },
148 * { PATHSPEC_ICASE, '\0', "icase" },
149 * { PATHSPEC_RECURSIVE, '*', "recursive" },
150 * { PATHSPEC_REGEXP, '\0', "regexp" },
151 *
152 */
153#define PATHSPEC_FROMTOP (1<<0)
154struct pathspec_magic {
156 unsigned bit;
157 char mnemonic; /* this cannot be ':'! */
158 const char *name;
159} pathspec_magic[] = {
160 { PATHSPEC_FROMTOP, '/', "top" },
161};
162/*
164 * Take an element of a pathspec and check for magic signatures.
165 * Append the result to the prefix.
166 *
167 * For now, we only parse the syntax and throw out anything other than
168 * "top" magic.
169 *
170 * NEEDSWORK: This needs to be rewritten when we start migrating
171 * get_pathspec() users to use the "struct pathspec" interface. For
172 * example, a pathspec element may be marked as case-insensitive, but
173 * the prefix part must always match literally, and a single stupid
174 * string cannot express such a case.
175 */
176const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt)
177{
178 unsigned magic = 0;
179 const char *copyfrom = elt;
180 int i;
181 if (elt[0] != ':') {
183 ; /* nothing to do */
184 } else if (elt[1] == '(') {
185 /* longhand */
186 const char *nextat;
187 for (copyfrom = elt + 2;
188 *copyfrom && *copyfrom != ')';
189 copyfrom = nextat) {
190 size_t len = strcspn(copyfrom, ",)");
191 if (copyfrom[len] == ')')
192 nextat = copyfrom + len;
193 else
194 nextat = copyfrom + len + 1;
195 if (!len)
196 continue;
197 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
198 if (strlen(pathspec_magic[i].name) == len &&
199 !strncmp(pathspec_magic[i].name, copyfrom, len)) {
200 magic |= pathspec_magic[i].bit;
201 break;
202 }
203 if (ARRAY_SIZE(pathspec_magic) <= i)
204 die("Invalid pathspec magic '%.*s' in '%s'",
205 (int) len, copyfrom, elt);
206 }
207 if (*copyfrom == ')')
208 copyfrom++;
209 } else {
210 /* shorthand */
211 for (copyfrom = elt + 1;
212 *copyfrom && *copyfrom != ':';
213 copyfrom++) {
214 char ch = *copyfrom;
215 if (!is_pathspec_magic(ch))
217 break;
218 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
219 if (pathspec_magic[i].mnemonic == ch) {
220 magic |= pathspec_magic[i].bit;
221 break;
222 }
223 if (ARRAY_SIZE(pathspec_magic) <= i)
224 die("Unimplemented pathspec magic '%c' in '%s'",
225 ch, elt);
226 }
227 if (*copyfrom == ':')
228 copyfrom++;
229 }
230 if (magic & PATHSPEC_FROMTOP)
232 return xstrdup(copyfrom);
233 else
234 return prefix_path(prefix, prefixlen, copyfrom);
235}
236const char **get_pathspec(const char *prefix, const char **pathspec)
238{
239 const char *entry = *pathspec;
240 const char **src, **dst;
241 int prefixlen;
242 if (!prefix && !entry)
244 return NULL;
245 if (!entry) {
247 static const char *spec[2];
248 spec[0] = prefix;
249 spec[1] = NULL;
250 return spec;
251 }
252 /* Otherwise we have to re-write the entries.. */
254 src = pathspec;
255 dst = pathspec;
256 prefixlen = prefix ? strlen(prefix) : 0;
257 while (*src) {
258 *(dst++) = prefix_pathspec(prefix, prefixlen, *src);
259 src++;
260 }
261 *dst = NULL;
262 if (!*pathspec)
263 return NULL;
264 return pathspec;
265}
266/*
268 * Test if it looks like we're at a git directory.
269 * We want to see:
270 *
271 * - either an objects/ directory _or_ the proper
272 * GIT_OBJECT_DIRECTORY environment variable
273 * - a refs/ directory
274 * - either a HEAD symlink or a HEAD file that is formatted as
275 * a proper "ref:", or a regular file HEAD that has a properly
276 * formatted sha1 object name.
277 */
278static int is_git_directory(const char *suspect)
279{
280 char path[PATH_MAX];
281 size_t len = strlen(suspect);
282 if (PATH_MAX <= len + strlen("/objects"))
284 die("Too long path: %.*s", 60, suspect);
285 strcpy(path, suspect);
286 if (getenv(DB_ENVIRONMENT)) {
287 if (access(getenv(DB_ENVIRONMENT), X_OK))
288 return 0;
289 }
290 else {
291 strcpy(path + len, "/objects");
292 if (access(path, X_OK))
293 return 0;
294 }
295 strcpy(path + len, "/refs");
297 if (access(path, X_OK))
298 return 0;
299 strcpy(path + len, "/HEAD");
301 if (validate_headref(path))
302 return 0;
303 return 1;
305}
306int is_inside_git_dir(void)
308{
309 if (inside_git_dir < 0)
310 inside_git_dir = is_inside_dir(get_git_dir());
311 return inside_git_dir;
312}
313int is_inside_work_tree(void)
315{
316 if (inside_work_tree < 0)
317 inside_work_tree = is_inside_dir(get_git_work_tree());
318 return inside_work_tree;
319}
320void setup_work_tree(void)
322{
323 const char *work_tree, *git_dir;
324 static int initialized = 0;
325 if (initialized)
327 return;
328 work_tree = get_git_work_tree();
329 git_dir = get_git_dir();
330 if (!is_absolute_path(git_dir))
331 git_dir = real_path(get_git_dir());
332 if (!work_tree || chdir(work_tree))
333 die("This operation must be run in a work tree");
334 /*
336 * Make sure subsequent git processes find correct worktree
337 * if $GIT_WORK_TREE is set relative
338 */
339 if (getenv(GIT_WORK_TREE_ENVIRONMENT))
340 setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
341 set_git_dir(relative_path(git_dir, work_tree));
343 initialized = 1;
344}
345static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
347{
348 char repo_config[PATH_MAX+1];
349 /*
351 * git_config() can't be used here because it calls git_pathdup()
352 * to get $GIT_CONFIG/config. That call will make setup_git_env()
353 * set git_dir to ".git".
354 *
355 * We are in gitdir setup, no git dir has been found useable yet.
356 * Use a gentler version of git_config() to check if this repo
357 * is a good one.
358 */
359 snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
360 git_config_early(check_repository_format_version, NULL, repo_config);
361 if (GIT_REPO_VERSION < repository_format_version) {
362 if (!nongit_ok)
363 die ("Expected git repo version <= %d, found %d",
364 GIT_REPO_VERSION, repository_format_version);
365 warning("Expected git repo version <= %d, found %d",
366 GIT_REPO_VERSION, repository_format_version);
367 warning("Please upgrade Git");
368 *nongit_ok = -1;
369 return -1;
370 }
371 return 0;
372}
373/*
375 * Try to read the location of the git directory from the .git file,
376 * return path to git directory if found.
377 */
378const char *read_gitfile_gently(const char *path)
379{
380 char *buf;
381 char *dir;
382 const char *slash;
383 struct stat st;
384 int fd;
385 size_t len;
386 if (stat(path, &st))
388 return NULL;
389 if (!S_ISREG(st.st_mode))
390 return NULL;
391 fd = open(path, O_RDONLY);
392 if (fd < 0)
393 die_errno("Error opening '%s'", path);
394 buf = xmalloc(st.st_size + 1);
395 len = read_in_full(fd, buf, st.st_size);
396 close(fd);
397 if (len != st.st_size)
398 die("Error reading %s", path);
399 buf[len] = '\0';
400 if (prefixcmp(buf, "gitdir: "))
401 die("Invalid gitfile format: %s", path);
402 while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
403 len--;
404 if (len < 9)
405 die("No path in gitfile: %s", path);
406 buf[len] = '\0';
407 dir = buf + 8;
408 if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
410 size_t pathlen = slash+1 - path;
411 size_t dirlen = pathlen + len - 8;
412 dir = xmalloc(dirlen + 1);
413 strncpy(dir, path, pathlen);
414 strncpy(dir + pathlen, buf + 8, len - 8);
415 dir[dirlen] = '\0';
416 free(buf);
417 buf = dir;
418 }
419 if (!is_git_directory(dir))
421 die("Not a git repository: %s", dir);
422 path = real_path(dir);
423 free(buf);
425 return path;
426}
427static const char *setup_explicit_git_dir(const char *gitdirenv,
429 char *cwd, int len,
430 int *nongit_ok)
431{
432 const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
433 const char *worktree;
434 char *gitfile;
435 if (PATH_MAX - 40 < strlen(gitdirenv))
437 die("'$%s' too big", GIT_DIR_ENVIRONMENT);
438 gitfile = (char*)read_gitfile_gently(gitdirenv);
440 if (gitfile) {
441 gitfile = xstrdup(gitfile);
442 gitdirenv = gitfile;
443 }
444 if (!is_git_directory(gitdirenv)) {
446 if (nongit_ok) {
447 *nongit_ok = 1;
448 free(gitfile);
449 return NULL;
450 }
451 die("Not a git repository: '%s'", gitdirenv);
452 }
453 if (check_repository_format_gently(gitdirenv, nongit_ok)) {
455 free(gitfile);
456 return NULL;
457 }
458 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
460 if (work_tree_env)
461 set_git_work_tree(work_tree_env);
462 else if (is_bare_repository_cfg > 0) {
463 if (git_work_tree_cfg) /* #22.2, #30 */
464 die("core.bare and core.worktree do not make sense");
465 /* #18, #26 */
467 set_git_dir(gitdirenv);
468 free(gitfile);
469 return NULL;
470 }
471 else if (git_work_tree_cfg) { /* #6, #14 */
472 if (is_absolute_path(git_work_tree_cfg))
473 set_git_work_tree(git_work_tree_cfg);
474 else {
475 char core_worktree[PATH_MAX];
476 if (chdir(gitdirenv))
477 die_errno("Could not chdir to '%s'", gitdirenv);
478 if (chdir(git_work_tree_cfg))
479 die_errno("Could not chdir to '%s'", git_work_tree_cfg);
480 if (!getcwd(core_worktree, PATH_MAX))
481 die_errno("Could not get directory '%s'", git_work_tree_cfg);
482 if (chdir(cwd))
483 die_errno("Could not come back to cwd");
484 set_git_work_tree(core_worktree);
485 }
486 }
487 else /* #2, #10 */
488 set_git_work_tree(".");
489 /* set_git_work_tree() must have been called by now */
491 worktree = get_git_work_tree();
492 /* both get_git_work_tree() and cwd are already normalized */
494 if (!strcmp(cwd, worktree)) { /* cwd == worktree */
495 set_git_dir(gitdirenv);
496 free(gitfile);
497 return NULL;
498 }
499 if (!prefixcmp(cwd, worktree) &&
501 cwd[strlen(worktree)] == '/') { /* cwd inside worktree */
502 set_git_dir(real_path(gitdirenv));
503 if (chdir(worktree))
504 die_errno("Could not chdir to '%s'", worktree);
505 cwd[len++] = '/';
506 cwd[len] = '\0';
507 free(gitfile);
508 return cwd + strlen(worktree) + 1;
509 }
510 /* cwd outside worktree */
512 set_git_dir(gitdirenv);
513 free(gitfile);
514 return NULL;
515}
516static const char *setup_discovered_git_dir(const char *gitdir,
518 char *cwd, int offset, int len,
519 int *nongit_ok)
520{
521 if (check_repository_format_gently(gitdir, nongit_ok))
522 return NULL;
523 /* --work-tree is set without --git-dir; use discovered one */
525 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
526 if (offset != len && !is_absolute_path(gitdir))
527 gitdir = xstrdup(real_path(gitdir));
528 if (chdir(cwd))
529 die_errno("Could not come back to cwd");
530 return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
531 }
532 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
534 if (is_bare_repository_cfg > 0) {
535 set_git_dir(offset == len ? gitdir : real_path(gitdir));
536 if (chdir(cwd))
537 die_errno("Could not come back to cwd");
538 return NULL;
539 }
540 /* #0, #1, #5, #8, #9, #12, #13 */
542 set_git_work_tree(".");
543 if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
544 set_git_dir(gitdir);
545 inside_git_dir = 0;
546 inside_work_tree = 1;
547 if (offset == len)
548 return NULL;
549 /* Make "offset" point to past the '/', and add a '/' at the end */
551 offset++;
552 cwd[len++] = '/';
553 cwd[len] = 0;
554 return cwd + offset;
555}
556/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
558static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
559{
560 int root_len;
561 if (check_repository_format_gently(".", nongit_ok))
563 return NULL;
564 /* --work-tree is set without --git-dir; use discovered one */
566 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
567 const char *gitdir;
568 gitdir = offset == len ? "." : xmemdupz(cwd, offset);
570 if (chdir(cwd))
571 die_errno("Could not come back to cwd");
572 return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
573 }
574 inside_git_dir = 1;
576 inside_work_tree = 0;
577 if (offset != len) {
578 if (chdir(cwd))
579 die_errno("Cannot come back to cwd");
580 root_len = offset_1st_component(cwd);
581 cwd[offset > root_len ? offset : root_len] = '\0';
582 set_git_dir(cwd);
583 }
584 else
585 set_git_dir(".");
586 return NULL;
587}
588static const char *setup_nongit(const char *cwd, int *nongit_ok)
590{
591 if (!nongit_ok)
592 die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
593 if (chdir(cwd))
594 die_errno("Cannot come back to cwd");
595 *nongit_ok = 1;
596 return NULL;
597}
598static dev_t get_device_or_die(const char *path, const char *prefix)
600{
601 struct stat buf;
602 if (stat(path, &buf))
603 die_errno("failed to stat '%s%s%s'",
604 prefix ? prefix : "",
605 prefix ? "/" : "", path);
606 return buf.st_dev;
607}
608/*
610 * We cannot decide in this function whether we are in the work tree or
611 * not, since the config can only be read _after_ this function was called.
612 */
613static const char *setup_git_directory_gently_1(int *nongit_ok)
614{
615 const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
616 static char cwd[PATH_MAX+1];
617 const char *gitdirenv, *ret;
618 char *gitfile;
619 int len, offset, ceil_offset;
620 dev_t current_device = 0;
621 int one_filesystem = 1;
622 /*
624 * Let's assume that we are in a git repository.
625 * If it turns out later that we are somewhere else, the value will be
626 * updated accordingly.
627 */
628 if (nongit_ok)
629 *nongit_ok = 0;
630 if (!getcwd(cwd, sizeof(cwd)-1))
632 die_errno("Unable to read current working directory");
633 offset = len = strlen(cwd);
634 /*
636 * If GIT_DIR is set explicitly, we're not going
637 * to do any discovery, but we still do repository
638 * validation.
639 */
640 gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
641 if (gitdirenv)
642 return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
643 ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs);
645 if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
646 ceil_offset = 1;
647 /*
649 * Test in the following order (relative to the cwd):
650 * - .git (file containing "gitdir: <path>")
651 * - .git/
652 * - ./ (bare)
653 * - ../.git
654 * - ../.git/
655 * - ../ (bare)
656 * - ../../.git/
657 * etc.
658 */
659 one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
660 if (one_filesystem)
661 current_device = get_device_or_die(".", NULL);
662 for (;;) {
663 gitfile = (char*)read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
664 if (gitfile)
665 gitdirenv = gitfile = xstrdup(gitfile);
666 else {
667 if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
668 gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
669 }
670 if (gitdirenv) {
672 ret = setup_discovered_git_dir(gitdirenv,
673 cwd, offset, len,
674 nongit_ok);
675 free(gitfile);
676 return ret;
677 }
678 free(gitfile);
679 if (is_git_directory("."))
681 return setup_bare_git_dir(cwd, offset, len, nongit_ok);
682 while (--offset > ceil_offset && cwd[offset] != '/');
684 if (offset <= ceil_offset)
685 return setup_nongit(cwd, nongit_ok);
686 if (one_filesystem) {
687 dev_t parent_device = get_device_or_die("..", cwd);
688 if (parent_device != current_device) {
689 if (nongit_ok) {
690 if (chdir(cwd))
691 die_errno("Cannot come back to cwd");
692 *nongit_ok = 1;
693 return NULL;
694 }
695 cwd[offset] = '\0';
696 die("Not a git repository (or any parent up to mount parent %s)\n"
697 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
698 }
699 }
700 if (chdir("..")) {
701 cwd[offset] = '\0';
702 die_errno("Cannot change to '%s/..'", cwd);
703 }
704 }
705}
706const char *setup_git_directory_gently(int *nongit_ok)
708{
709 const char *prefix;
710 prefix = setup_git_directory_gently_1(nongit_ok);
712 if (startup_info) {
713 startup_info->have_repository = !nongit_ok || !*nongit_ok;
714 startup_info->prefix = prefix;
715 }
716 return prefix;
717}
718int git_config_perm(const char *var, const char *value)
720{
721 int i;
722 char *endptr;
723 if (value == NULL)
725 return PERM_GROUP;
726 if (!strcmp(value, "umask"))
728 return PERM_UMASK;
729 if (!strcmp(value, "group"))
730 return PERM_GROUP;
731 if (!strcmp(value, "all") ||
732 !strcmp(value, "world") ||
733 !strcmp(value, "everybody"))
734 return PERM_EVERYBODY;
735 /* Parse octal numbers */
737 i = strtol(value, &endptr, 8);
738 /* If not an octal number, maybe true/false? */
740 if (*endptr != 0)
741 return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK;
742 /*
744 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
745 * a chmod value to restrict to.
746 */
747 switch (i) {
748 case PERM_UMASK: /* 0 */
749 return PERM_UMASK;
750 case OLD_PERM_GROUP: /* 1 */
751 return PERM_GROUP;
752 case OLD_PERM_EVERYBODY: /* 2 */
753 return PERM_EVERYBODY;
754 }
755 /* A filemode value was given: 0xxx */
757 if ((i & 0600) != 0600)
759 die("Problem with core.sharedRepository filemode value "
760 "(0%.3o).\nThe owner of files must always have "
761 "read and write permissions.", i);
762 /*
764 * Mask filemode value. Others can not get write permission.
765 * x flags for directories are handled separately.
766 */
767 return -(i & 0666);
768}
769int check_repository_format_version(const char *var, const char *value, void *cb)
771{
772 if (strcmp(var, "core.repositoryformatversion") == 0)
773 repository_format_version = git_config_int(var, value);
774 else if (strcmp(var, "core.sharedrepository") == 0)
775 shared_repository = git_config_perm(var, value);
776 else if (strcmp(var, "core.bare") == 0) {
777 is_bare_repository_cfg = git_config_bool(var, value);
778 if (is_bare_repository_cfg == 1)
779 inside_work_tree = -1;
780 } else if (strcmp(var, "core.worktree") == 0) {
781 if (!value)
782 return config_error_nonbool(var);
783 free(git_work_tree_cfg);
784 git_work_tree_cfg = xstrdup(value);
785 inside_work_tree = -1;
786 }
787 return 0;
788}
789int check_repository_format(void)
791{
792 return check_repository_format_gently(get_git_dir(), NULL);
793}
794/*
796 * Returns the "prefix", a path to the current working directory
797 * relative to the work tree root, or NULL, if the current working
798 * directory is not a strict subdirectory of the work tree root. The
799 * prefix always ends with a '/' character.
800 */
801const char *setup_git_directory(void)
802{
803 return setup_git_directory_gently(NULL);
804}