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)
154static struct 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 */
176static const 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}
266const char *pathspec_prefix(const char *prefix, const char **pathspec)
268{
269 const char **p, *n, *prev;
270 unsigned long max;
271 if (!pathspec)
273 return prefix ? xmemdupz(prefix, strlen(prefix)) : NULL;
274 prev = NULL;
276 max = PATH_MAX;
277 for (p = pathspec; (n = *p) != NULL; p++) {
278 int i, len = 0;
279 for (i = 0; i < max; i++) {
280 char c = n[i];
281 if (prev && prev[i] != c)
282 break;
283 if (!c || c == '*' || c == '?')
284 break;
285 if (c == '/')
286 len = i+1;
287 }
288 prev = n;
289 if (len < max) {
290 max = len;
291 if (!max)
292 break;
293 }
294 }
295 return max ? xmemdupz(prev, max) : NULL;
297}
298/*
300 * Test if it looks like we're at a git directory.
301 * We want to see:
302 *
303 * - either an objects/ directory _or_ the proper
304 * GIT_OBJECT_DIRECTORY environment variable
305 * - a refs/ directory
306 * - either a HEAD symlink or a HEAD file that is formatted as
307 * a proper "ref:", or a regular file HEAD that has a properly
308 * formatted sha1 object name.
309 */
310static int is_git_directory(const char *suspect)
311{
312 char path[PATH_MAX];
313 size_t len = strlen(suspect);
314 if (PATH_MAX <= len + strlen("/objects"))
316 die("Too long path: %.*s", 60, suspect);
317 strcpy(path, suspect);
318 if (getenv(DB_ENVIRONMENT)) {
319 if (access(getenv(DB_ENVIRONMENT), X_OK))
320 return 0;
321 }
322 else {
323 strcpy(path + len, "/objects");
324 if (access(path, X_OK))
325 return 0;
326 }
327 strcpy(path + len, "/refs");
329 if (access(path, X_OK))
330 return 0;
331 strcpy(path + len, "/HEAD");
333 if (validate_headref(path))
334 return 0;
335 return 1;
337}
338int is_inside_git_dir(void)
340{
341 if (inside_git_dir < 0)
342 inside_git_dir = is_inside_dir(get_git_dir());
343 return inside_git_dir;
344}
345int is_inside_work_tree(void)
347{
348 if (inside_work_tree < 0)
349 inside_work_tree = is_inside_dir(get_git_work_tree());
350 return inside_work_tree;
351}
352void setup_work_tree(void)
354{
355 const char *work_tree, *git_dir;
356 static int initialized = 0;
357 if (initialized)
359 return;
360 work_tree = get_git_work_tree();
361 git_dir = get_git_dir();
362 if (!is_absolute_path(git_dir))
363 git_dir = real_path(get_git_dir());
364 if (!work_tree || chdir(work_tree))
365 die("This operation must be run in a work tree");
366 /*
368 * Make sure subsequent git processes find correct worktree
369 * if $GIT_WORK_TREE is set relative
370 */
371 if (getenv(GIT_WORK_TREE_ENVIRONMENT))
372 setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
373 set_git_dir(relative_path(git_dir, work_tree));
375 initialized = 1;
376}
377static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
379{
380 char repo_config[PATH_MAX+1];
381 /*
383 * git_config() can't be used here because it calls git_pathdup()
384 * to get $GIT_CONFIG/config. That call will make setup_git_env()
385 * set git_dir to ".git".
386 *
387 * We are in gitdir setup, no git dir has been found useable yet.
388 * Use a gentler version of git_config() to check if this repo
389 * is a good one.
390 */
391 snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
392 git_config_early(check_repository_format_version, NULL, repo_config);
393 if (GIT_REPO_VERSION < repository_format_version) {
394 if (!nongit_ok)
395 die ("Expected git repo version <= %d, found %d",
396 GIT_REPO_VERSION, repository_format_version);
397 warning("Expected git repo version <= %d, found %d",
398 GIT_REPO_VERSION, repository_format_version);
399 warning("Please upgrade Git");
400 *nongit_ok = -1;
401 return -1;
402 }
403 return 0;
404}
405/*
407 * Try to read the location of the git directory from the .git file,
408 * return path to git directory if found.
409 */
410const char *read_gitfile_gently(const char *path)
411{
412 char *buf;
413 char *dir;
414 const char *slash;
415 struct stat st;
416 int fd;
417 ssize_t len;
418 if (stat(path, &st))
420 return NULL;
421 if (!S_ISREG(st.st_mode))
422 return NULL;
423 fd = open(path, O_RDONLY);
424 if (fd < 0)
425 die_errno("Error opening '%s'", path);
426 buf = xmalloc(st.st_size + 1);
427 len = read_in_full(fd, buf, st.st_size);
428 close(fd);
429 if (len != st.st_size)
430 die("Error reading %s", path);
431 buf[len] = '\0';
432 if (prefixcmp(buf, "gitdir: "))
433 die("Invalid gitfile format: %s", path);
434 while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
435 len--;
436 if (len < 9)
437 die("No path in gitfile: %s", path);
438 buf[len] = '\0';
439 dir = buf + 8;
440 if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
442 size_t pathlen = slash+1 - path;
443 size_t dirlen = pathlen + len - 8;
444 dir = xmalloc(dirlen + 1);
445 strncpy(dir, path, pathlen);
446 strncpy(dir + pathlen, buf + 8, len - 8);
447 dir[dirlen] = '\0';
448 free(buf);
449 buf = dir;
450 }
451 if (!is_git_directory(dir))
453 die("Not a git repository: %s", dir);
454 path = real_path(dir);
455 free(buf);
457 return path;
458}
459static const char *setup_explicit_git_dir(const char *gitdirenv,
461 char *cwd, int len,
462 int *nongit_ok)
463{
464 const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
465 const char *worktree;
466 char *gitfile;
467 int offset;
468 if (PATH_MAX - 40 < strlen(gitdirenv))
470 die("'$%s' too big", GIT_DIR_ENVIRONMENT);
471 gitfile = (char*)read_gitfile_gently(gitdirenv);
473 if (gitfile) {
474 gitfile = xstrdup(gitfile);
475 gitdirenv = gitfile;
476 }
477 if (!is_git_directory(gitdirenv)) {
479 if (nongit_ok) {
480 *nongit_ok = 1;
481 free(gitfile);
482 return NULL;
483 }
484 die("Not a git repository: '%s'", gitdirenv);
485 }
486 if (check_repository_format_gently(gitdirenv, nongit_ok)) {
488 free(gitfile);
489 return NULL;
490 }
491 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
493 if (work_tree_env)
494 set_git_work_tree(work_tree_env);
495 else if (is_bare_repository_cfg > 0) {
496 if (git_work_tree_cfg) /* #22.2, #30 */
497 die("core.bare and core.worktree do not make sense");
498 /* #18, #26 */
500 set_git_dir(gitdirenv);
501 free(gitfile);
502 return NULL;
503 }
504 else if (git_work_tree_cfg) { /* #6, #14 */
505 if (is_absolute_path(git_work_tree_cfg))
506 set_git_work_tree(git_work_tree_cfg);
507 else {
508 char core_worktree[PATH_MAX];
509 if (chdir(gitdirenv))
510 die_errno("Could not chdir to '%s'", gitdirenv);
511 if (chdir(git_work_tree_cfg))
512 die_errno("Could not chdir to '%s'", git_work_tree_cfg);
513 if (!getcwd(core_worktree, PATH_MAX))
514 die_errno("Could not get directory '%s'", git_work_tree_cfg);
515 if (chdir(cwd))
516 die_errno("Could not come back to cwd");
517 set_git_work_tree(core_worktree);
518 }
519 }
520 else /* #2, #10 */
521 set_git_work_tree(".");
522 /* set_git_work_tree() must have been called by now */
524 worktree = get_git_work_tree();
525 /* both get_git_work_tree() and cwd are already normalized */
527 if (!strcmp(cwd, worktree)) { /* cwd == worktree */
528 set_git_dir(gitdirenv);
529 free(gitfile);
530 return NULL;
531 }
532 offset = dir_inside_of(cwd, worktree);
534 if (offset >= 0) { /* cwd inside worktree? */
535 set_git_dir(real_path(gitdirenv));
536 if (chdir(worktree))
537 die_errno("Could not chdir to '%s'", worktree);
538 cwd[len++] = '/';
539 cwd[len] = '\0';
540 free(gitfile);
541 return cwd + offset;
542 }
543 /* cwd outside worktree */
545 set_git_dir(gitdirenv);
546 free(gitfile);
547 return NULL;
548}
549static const char *setup_discovered_git_dir(const char *gitdir,
551 char *cwd, int offset, int len,
552 int *nongit_ok)
553{
554 if (check_repository_format_gently(gitdir, nongit_ok))
555 return NULL;
556 /* --work-tree is set without --git-dir; use discovered one */
558 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
559 if (offset != len && !is_absolute_path(gitdir))
560 gitdir = xstrdup(real_path(gitdir));
561 if (chdir(cwd))
562 die_errno("Could not come back to cwd");
563 return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
564 }
565 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
567 if (is_bare_repository_cfg > 0) {
568 set_git_dir(offset == len ? gitdir : real_path(gitdir));
569 if (chdir(cwd))
570 die_errno("Could not come back to cwd");
571 return NULL;
572 }
573 /* #0, #1, #5, #8, #9, #12, #13 */
575 set_git_work_tree(".");
576 if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
577 set_git_dir(gitdir);
578 inside_git_dir = 0;
579 inside_work_tree = 1;
580 if (offset == len)
581 return NULL;
582 /* Make "offset" point to past the '/', and add a '/' at the end */
584 offset++;
585 cwd[len++] = '/';
586 cwd[len] = 0;
587 return cwd + offset;
588}
589/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
591static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
592{
593 int root_len;
594 if (check_repository_format_gently(".", nongit_ok))
596 return NULL;
597 /* --work-tree is set without --git-dir; use discovered one */
599 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
600 const char *gitdir;
601 gitdir = offset == len ? "." : xmemdupz(cwd, offset);
603 if (chdir(cwd))
604 die_errno("Could not come back to cwd");
605 return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
606 }
607 inside_git_dir = 1;
609 inside_work_tree = 0;
610 if (offset != len) {
611 if (chdir(cwd))
612 die_errno("Cannot come back to cwd");
613 root_len = offset_1st_component(cwd);
614 cwd[offset > root_len ? offset : root_len] = '\0';
615 set_git_dir(cwd);
616 }
617 else
618 set_git_dir(".");
619 return NULL;
620}
621static const char *setup_nongit(const char *cwd, int *nongit_ok)
623{
624 if (!nongit_ok)
625 die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
626 if (chdir(cwd))
627 die_errno("Cannot come back to cwd");
628 *nongit_ok = 1;
629 return NULL;
630}
631static dev_t get_device_or_die(const char *path, const char *prefix)
633{
634 struct stat buf;
635 if (stat(path, &buf))
636 die_errno("failed to stat '%s%s%s'",
637 prefix ? prefix : "",
638 prefix ? "/" : "", path);
639 return buf.st_dev;
640}
641/*
643 * We cannot decide in this function whether we are in the work tree or
644 * not, since the config can only be read _after_ this function was called.
645 */
646static const char *setup_git_directory_gently_1(int *nongit_ok)
647{
648 const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
649 static char cwd[PATH_MAX+1];
650 const char *gitdirenv, *ret;
651 char *gitfile;
652 int len, offset, ceil_offset;
653 dev_t current_device = 0;
654 int one_filesystem = 1;
655 /*
657 * Let's assume that we are in a git repository.
658 * If it turns out later that we are somewhere else, the value will be
659 * updated accordingly.
660 */
661 if (nongit_ok)
662 *nongit_ok = 0;
663 if (!getcwd(cwd, sizeof(cwd)-1))
665 die_errno("Unable to read current working directory");
666 offset = len = strlen(cwd);
667 /*
669 * If GIT_DIR is set explicitly, we're not going
670 * to do any discovery, but we still do repository
671 * validation.
672 */
673 gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
674 if (gitdirenv)
675 return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
676 ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs);
678 if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
679 ceil_offset = 1;
680 /*
682 * Test in the following order (relative to the cwd):
683 * - .git (file containing "gitdir: <path>")
684 * - .git/
685 * - ./ (bare)
686 * - ../.git
687 * - ../.git/
688 * - ../ (bare)
689 * - ../../.git/
690 * etc.
691 */
692 one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
693 if (one_filesystem)
694 current_device = get_device_or_die(".", NULL);
695 for (;;) {
696 gitfile = (char*)read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
697 if (gitfile)
698 gitdirenv = gitfile = xstrdup(gitfile);
699 else {
700 if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
701 gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
702 }
703 if (gitdirenv) {
705 ret = setup_discovered_git_dir(gitdirenv,
706 cwd, offset, len,
707 nongit_ok);
708 free(gitfile);
709 return ret;
710 }
711 free(gitfile);
712 if (is_git_directory("."))
714 return setup_bare_git_dir(cwd, offset, len, nongit_ok);
715 while (--offset > ceil_offset && cwd[offset] != '/');
717 if (offset <= ceil_offset)
718 return setup_nongit(cwd, nongit_ok);
719 if (one_filesystem) {
720 dev_t parent_device = get_device_or_die("..", cwd);
721 if (parent_device != current_device) {
722 if (nongit_ok) {
723 if (chdir(cwd))
724 die_errno("Cannot come back to cwd");
725 *nongit_ok = 1;
726 return NULL;
727 }
728 cwd[offset] = '\0';
729 die("Not a git repository (or any parent up to mount parent %s)\n"
730 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
731 }
732 }
733 if (chdir("..")) {
734 cwd[offset] = '\0';
735 die_errno("Cannot change to '%s/..'", cwd);
736 }
737 }
738}
739const char *setup_git_directory_gently(int *nongit_ok)
741{
742 const char *prefix;
743 prefix = setup_git_directory_gently_1(nongit_ok);
745 if (startup_info) {
746 startup_info->have_repository = !nongit_ok || !*nongit_ok;
747 startup_info->prefix = prefix;
748 }
749 return prefix;
750}
751int git_config_perm(const char *var, const char *value)
753{
754 int i;
755 char *endptr;
756 if (value == NULL)
758 return PERM_GROUP;
759 if (!strcmp(value, "umask"))
761 return PERM_UMASK;
762 if (!strcmp(value, "group"))
763 return PERM_GROUP;
764 if (!strcmp(value, "all") ||
765 !strcmp(value, "world") ||
766 !strcmp(value, "everybody"))
767 return PERM_EVERYBODY;
768 /* Parse octal numbers */
770 i = strtol(value, &endptr, 8);
771 /* If not an octal number, maybe true/false? */
773 if (*endptr != 0)
774 return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK;
775 /*
777 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
778 * a chmod value to restrict to.
779 */
780 switch (i) {
781 case PERM_UMASK: /* 0 */
782 return PERM_UMASK;
783 case OLD_PERM_GROUP: /* 1 */
784 return PERM_GROUP;
785 case OLD_PERM_EVERYBODY: /* 2 */
786 return PERM_EVERYBODY;
787 }
788 /* A filemode value was given: 0xxx */
790 if ((i & 0600) != 0600)
792 die("Problem with core.sharedRepository filemode value "
793 "(0%.3o).\nThe owner of files must always have "
794 "read and write permissions.", i);
795 /*
797 * Mask filemode value. Others can not get write permission.
798 * x flags for directories are handled separately.
799 */
800 return -(i & 0666);
801}
802int check_repository_format_version(const char *var, const char *value, void *cb)
804{
805 if (strcmp(var, "core.repositoryformatversion") == 0)
806 repository_format_version = git_config_int(var, value);
807 else if (strcmp(var, "core.sharedrepository") == 0)
808 shared_repository = git_config_perm(var, value);
809 else if (strcmp(var, "core.bare") == 0) {
810 is_bare_repository_cfg = git_config_bool(var, value);
811 if (is_bare_repository_cfg == 1)
812 inside_work_tree = -1;
813 } else if (strcmp(var, "core.worktree") == 0) {
814 if (!value)
815 return config_error_nonbool(var);
816 free(git_work_tree_cfg);
817 git_work_tree_cfg = xstrdup(value);
818 inside_work_tree = -1;
819 }
820 return 0;
821}
822int check_repository_format(void)
824{
825 return check_repository_format_gently(get_git_dir(), NULL);
826}
827/*
829 * Returns the "prefix", a path to the current working directory
830 * relative to the work tree root, or NULL, if the current working
831 * directory is not a strict subdirectory of the work tree root. The
832 * prefix always ends with a '/' character.
833 */
834const char *setup_git_directory(void)
835{
836 return setup_git_directory_gently(NULL);
837}