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Commit | Line | Data |
---|---|---|
d288a700 | 1 | #include "cache.h" |
e90fdc39 | 2 | #include "dir.h" |
31171d9e | 3 | #include "string-list.h" |
e90fdc39 JS |
4 | |
5 | static int inside_git_dir = -1; | |
6 | static int inside_work_tree = -1; | |
fada7674 | 7 | static int work_tree_config_is_bogus; |
00a09d57 | 8 | static struct string_list unknown_extensions = STRING_LIST_INIT_DUP; |
d288a700 | 9 | |
ddc2a628 MEW |
10 | /* |
11 | * The input parameter must contain an absolute path, and it must already be | |
12 | * normalized. | |
13 | * | |
14 | * Find the part of an absolute path that lies inside the work tree by | |
15 | * dereferencing symlinks outside the work tree, for example: | |
16 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
17 | * /dir/file (work tree is /) -> dir/file | |
18 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
19 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
20 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
21 | */ | |
22 | static int abspath_part_inside_repo(char *path) | |
23 | { | |
24 | size_t len; | |
25 | size_t wtlen; | |
26 | char *path0; | |
27 | int off; | |
28 | const char *work_tree = get_git_work_tree(); | |
29 | ||
30 | if (!work_tree) | |
31 | return -1; | |
32 | wtlen = strlen(work_tree); | |
33 | len = strlen(path); | |
6127ff63 | 34 | off = offset_1st_component(path); |
ddc2a628 MEW |
35 | |
36 | /* check if work tree is already the prefix */ | |
37 | if (wtlen <= len && !strncmp(path, work_tree, wtlen)) { | |
38 | if (path[wtlen] == '/') { | |
39 | memmove(path, path + wtlen + 1, len - wtlen); | |
40 | return 0; | |
41 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
42 | /* work tree is the root, or the whole path */ | |
43 | memmove(path, path + wtlen, len - wtlen + 1); | |
44 | return 0; | |
45 | } | |
46 | /* work tree might match beginning of a symlink to work tree */ | |
47 | off = wtlen; | |
48 | } | |
49 | path0 = path; | |
6127ff63 | 50 | path += off; |
ddc2a628 MEW |
51 | |
52 | /* check each '/'-terminated level */ | |
53 | while (*path) { | |
54 | path++; | |
55 | if (*path == '/') { | |
56 | *path = '\0'; | |
57 | if (strcmp(real_path(path0), work_tree) == 0) { | |
58 | memmove(path0, path + 1, len - (path - path0)); | |
59 | return 0; | |
60 | } | |
61 | *path = '/'; | |
62 | } | |
63 | } | |
64 | ||
65 | /* check whole path */ | |
66 | if (strcmp(real_path(path0), work_tree) == 0) { | |
67 | *path0 = '\0'; | |
68 | return 0; | |
69 | } | |
70 | ||
71 | return -1; | |
72 | } | |
73 | ||
645a29c4 NTND |
74 | /* |
75 | * Normalize "path", prepending the "prefix" for relative paths. If | |
76 | * remaining_prefix is not NULL, return the actual prefix still | |
77 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
78 | * | |
79 | * foo -> sub1/sub2/foo (full prefix) | |
80 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
81 | * ../../bar -> bar (no remaining prefix) | |
82 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
83 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
84 | */ | |
85 | char *prefix_path_gently(const char *prefix, int len, | |
86 | int *remaining_prefix, const char *path) | |
d089ebaa JH |
87 | { |
88 | const char *orig = path; | |
18e051a3 CMAB |
89 | char *sanitized; |
90 | if (is_absolute_path(orig)) { | |
3733e694 | 91 | sanitized = xmallocz(strlen(path)); |
645a29c4 NTND |
92 | if (remaining_prefix) |
93 | *remaining_prefix = 0; | |
655ee9ea MEW |
94 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { |
95 | free(sanitized); | |
96 | return NULL; | |
97 | } | |
98 | if (abspath_part_inside_repo(sanitized)) { | |
99 | free(sanitized); | |
100 | return NULL; | |
101 | } | |
18e051a3 | 102 | } else { |
75faa45a | 103 | sanitized = xstrfmt("%.*s%s", len, prefix, path); |
645a29c4 NTND |
104 | if (remaining_prefix) |
105 | *remaining_prefix = len; | |
655ee9ea | 106 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
546e0fd9 JK |
107 | free(sanitized); |
108 | return NULL; | |
d089ebaa | 109 | } |
d089ebaa JH |
110 | } |
111 | return sanitized; | |
f332726e LT |
112 | } |
113 | ||
546e0fd9 JK |
114 | char *prefix_path(const char *prefix, int len, const char *path) |
115 | { | |
645a29c4 | 116 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
117 | if (!r) |
118 | die("'%s' is outside repository", path); | |
119 | return r; | |
120 | } | |
121 | ||
122 | int path_inside_repo(const char *prefix, const char *path) | |
123 | { | |
124 | int len = prefix ? strlen(prefix) : 0; | |
645a29c4 | 125 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
126 | if (r) { |
127 | free(r); | |
128 | return 1; | |
129 | } | |
130 | return 0; | |
131 | } | |
132 | ||
c6e8c800 JH |
133 | int check_filename(const char *prefix, const char *arg) |
134 | { | |
135 | const char *name; | |
136 | struct stat st; | |
137 | ||
59556548 | 138 | if (starts_with(arg, ":/")) { |
4db86e8b NTND |
139 | if (arg[2] == '\0') /* ":/" is root dir, always exists */ |
140 | return 1; | |
141 | name = arg + 2; | |
df714f81 | 142 | } else if (prefix) |
4db86e8b NTND |
143 | name = prefix_filename(prefix, strlen(prefix), arg); |
144 | else | |
145 | name = arg; | |
c6e8c800 JH |
146 | if (!lstat(name, &st)) |
147 | return 1; /* file exists */ | |
148 | if (errno == ENOENT || errno == ENOTDIR) | |
149 | return 0; /* file does not exist */ | |
150 | die_errno("failed to stat '%s'", arg); | |
151 | } | |
152 | ||
023e37c3 MM |
153 | static void NORETURN die_verify_filename(const char *prefix, |
154 | const char *arg, | |
155 | int diagnose_misspelt_rev) | |
009fee47 | 156 | { |
023e37c3 MM |
157 | if (!diagnose_misspelt_rev) |
158 | die("%s: no such path in the working tree.\n" | |
4d4b5739 | 159 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally.", |
023e37c3 | 160 | arg); |
0e539dca JH |
161 | /* |
162 | * Saying "'(icase)foo' does not exist in the index" when the | |
163 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
164 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 165 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
166 | */ |
167 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
8c135ea2 | 168 | maybe_die_on_misspelt_object_name(arg, prefix); |
0e539dca | 169 | |
009fee47 MM |
170 | /* ... or fall back the most general message. */ |
171 | die("ambiguous argument '%s': unknown revision or path not in the working tree.\n" | |
4d4b5739 MM |
172 | "Use '--' to separate paths from revisions, like this:\n" |
173 | "'git <command> [<revision>...] -- [<file>...]'", arg); | |
009fee47 MM |
174 | |
175 | } | |
176 | ||
e23d0b4a LT |
177 | /* |
178 | * Verify a filename that we got as an argument for a pathspec | |
179 | * entry. Note that a filename that begins with "-" never verifies | |
180 | * as true, because even if such a filename were to exist, we want | |
181 | * it to be preceded by the "--" marker (or we want the user to | |
182 | * use a format like "./-filename") | |
023e37c3 MM |
183 | * |
184 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
185 | * diagnosis when dying upon finding that "name" is not a pathname. | |
186 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
187 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
188 | * will only complain about an inexisting file. | |
189 | * | |
190 | * This function is typically called to check that a "file or rev" | |
191 | * argument is unambiguous. In this case, the caller will want | |
192 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
193 | * argument (which could have been a revision), and | |
194 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
195 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 196 | */ |
023e37c3 MM |
197 | void verify_filename(const char *prefix, |
198 | const char *arg, | |
199 | int diagnose_misspelt_rev) | |
e23d0b4a | 200 | { |
e23d0b4a LT |
201 | if (*arg == '-') |
202 | die("bad flag '%s' used after filename", arg); | |
df714f81 | 203 | if (check_filename(prefix, arg) || !no_wildcard(arg)) |
e23d0b4a | 204 | return; |
023e37c3 | 205 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
206 | } |
207 | ||
ea92f41f JH |
208 | /* |
209 | * Opposite of the above: the command line did not have -- marker | |
210 | * and we parsed the arg as a refname. It should not be interpretable | |
211 | * as a filename. | |
212 | */ | |
213 | void verify_non_filename(const char *prefix, const char *arg) | |
214 | { | |
7ae3df8c | 215 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 216 | return; |
ea92f41f JH |
217 | if (*arg == '-') |
218 | return; /* flag */ | |
c6e8c800 JH |
219 | if (!check_filename(prefix, arg)) |
220 | return; | |
221 | die("ambiguous argument '%s': both revision and filename\n" | |
4d4b5739 MM |
222 | "Use '--' to separate paths from revisions, like this:\n" |
223 | "'git <command> [<revision>...] -- [<file>...]'", arg); | |
ea92f41f JH |
224 | } |
225 | ||
31e26ebc | 226 | int get_common_dir(struct strbuf *sb, const char *gitdir) |
11f9dd71 MK |
227 | { |
228 | const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
229 | if (git_env_common_dir) { | |
230 | strbuf_addstr(sb, git_env_common_dir); | |
231 | return 1; | |
232 | } else { | |
233 | return get_common_dir_noenv(sb, gitdir); | |
234 | } | |
235 | } | |
236 | ||
237 | int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) | |
4dc4e145 NTND |
238 | { |
239 | struct strbuf data = STRBUF_INIT; | |
240 | struct strbuf path = STRBUF_INIT; | |
31e26ebc | 241 | int ret = 0; |
11f9dd71 | 242 | |
4dc4e145 NTND |
243 | strbuf_addf(&path, "%s/commondir", gitdir); |
244 | if (file_exists(path.buf)) { | |
245 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
246 | die_errno(_("failed to read %s"), path.buf); | |
247 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
248 | data.buf[data.len - 1] == '\r')) | |
249 | data.len--; | |
250 | data.buf[data.len] = '\0'; | |
251 | strbuf_reset(&path); | |
252 | if (!is_absolute_path(data.buf)) | |
253 | strbuf_addf(&path, "%s/", gitdir); | |
254 | strbuf_addbuf(&path, &data); | |
255 | strbuf_addstr(sb, real_path(path.buf)); | |
31e26ebc | 256 | ret = 1; |
4dc4e145 NTND |
257 | } else |
258 | strbuf_addstr(sb, gitdir); | |
259 | strbuf_release(&data); | |
260 | strbuf_release(&path); | |
31e26ebc | 261 | return ret; |
4dc4e145 | 262 | } |
d288a700 | 263 | |
5f5608bc | 264 | /* |
ad1a382f | 265 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 266 | * We want to see: |
5f5608bc | 267 | * |
790296fd | 268 | * - either an objects/ directory _or_ the proper |
5f5608bc | 269 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 270 | * - a refs/ directory |
8098a178 | 271 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
272 | * a proper "ref:", or a regular file HEAD that has a properly |
273 | * formatted sha1 object name. | |
5f5608bc | 274 | */ |
b3256eb8 | 275 | int is_git_directory(const char *suspect) |
5f5608bc | 276 | { |
1d186b6f NTND |
277 | struct strbuf path = STRBUF_INIT; |
278 | int ret = 0; | |
279 | size_t len; | |
ad1a382f | 280 | |
4dc4e145 NTND |
281 | /* Check worktree-related signatures */ |
282 | strbuf_addf(&path, "%s/HEAD", suspect); | |
283 | if (validate_headref(path.buf)) | |
284 | goto done; | |
285 | ||
286 | strbuf_reset(&path); | |
287 | get_common_dir(&path, suspect); | |
1d186b6f | 288 | len = path.len; |
4dc4e145 NTND |
289 | |
290 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
291 | if (getenv(DB_ENVIRONMENT)) { |
292 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 293 | goto done; |
ad1a382f SP |
294 | } |
295 | else { | |
4dc4e145 | 296 | strbuf_setlen(&path, len); |
1d186b6f NTND |
297 | strbuf_addstr(&path, "/objects"); |
298 | if (access(path.buf, X_OK)) | |
299 | goto done; | |
ad1a382f SP |
300 | } |
301 | ||
1d186b6f NTND |
302 | strbuf_setlen(&path, len); |
303 | strbuf_addstr(&path, "/refs"); | |
304 | if (access(path.buf, X_OK)) | |
305 | goto done; | |
ad1a382f | 306 | |
1d186b6f NTND |
307 | ret = 1; |
308 | done: | |
309 | strbuf_release(&path); | |
310 | return ret; | |
5f5608bc LT |
311 | } |
312 | ||
ffd036b1 JK |
313 | int is_nonbare_repository_dir(struct strbuf *path) |
314 | { | |
315 | int ret = 0; | |
316 | int gitfile_error; | |
317 | size_t orig_path_len = path->len; | |
318 | assert(orig_path_len != 0); | |
319 | strbuf_complete(path, '/'); | |
320 | strbuf_addstr(path, ".git"); | |
321 | if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf)) | |
322 | ret = 1; | |
323 | if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED || | |
324 | gitfile_error == READ_GITFILE_ERR_READ_FAILED) | |
325 | ret = 1; | |
326 | strbuf_setlen(path, orig_path_len); | |
327 | return ret; | |
328 | } | |
329 | ||
68025633 JS |
330 | int is_inside_git_dir(void) |
331 | { | |
e90fdc39 JS |
332 | if (inside_git_dir < 0) |
333 | inside_git_dir = is_inside_dir(get_git_dir()); | |
334 | return inside_git_dir; | |
892c41b9 ML |
335 | } |
336 | ||
892c41b9 ML |
337 | int is_inside_work_tree(void) |
338 | { | |
e90fdc39 JS |
339 | if (inside_work_tree < 0) |
340 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
341 | return inside_work_tree; | |
892c41b9 ML |
342 | } |
343 | ||
f3fa1838 JH |
344 | void setup_work_tree(void) |
345 | { | |
354e6534 JS |
346 | const char *work_tree, *git_dir; |
347 | static int initialized = 0; | |
348 | ||
349 | if (initialized) | |
350 | return; | |
fada7674 JK |
351 | |
352 | if (work_tree_config_is_bogus) | |
353 | die("unable to set up work tree using invalid config"); | |
354 | ||
354e6534 JS |
355 | work_tree = get_git_work_tree(); |
356 | git_dir = get_git_dir(); | |
59f0f2f3 | 357 | if (!is_absolute_path(git_dir)) |
e2a57aac | 358 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
359 | if (!work_tree || chdir(work_tree)) |
360 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
361 | |
362 | /* | |
363 | * Make sure subsequent git processes find correct worktree | |
364 | * if $GIT_WORK_TREE is set relative | |
365 | */ | |
366 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
367 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
368 | ||
41894ae3 | 369 | set_git_dir(remove_leading_path(git_dir, work_tree)); |
354e6534 | 370 | initialized = 1; |
59f0f2f3 MH |
371 | } |
372 | ||
31e26ebc NTND |
373 | static int check_repo_format(const char *var, const char *value, void *cb) |
374 | { | |
00a09d57 JK |
375 | const char *ext; |
376 | ||
31e26ebc NTND |
377 | if (strcmp(var, "core.repositoryformatversion") == 0) |
378 | repository_format_version = git_config_int(var, value); | |
379 | else if (strcmp(var, "core.sharedrepository") == 0) | |
380 | shared_repository = git_config_perm(var, value); | |
00a09d57 JK |
381 | else if (skip_prefix(var, "extensions.", &ext)) { |
382 | /* | |
383 | * record any known extensions here; otherwise, | |
384 | * we fall through to recording it as unknown, and | |
385 | * check_repository_format will complain | |
386 | */ | |
387 | if (!strcmp(ext, "noop")) | |
388 | ; | |
067fbd41 JK |
389 | else if (!strcmp(ext, "preciousobjects")) |
390 | repository_format_precious_objects = git_config_bool(var, value); | |
00a09d57 JK |
391 | else |
392 | string_list_append(&unknown_extensions, ext); | |
393 | } | |
31e26ebc NTND |
394 | return 0; |
395 | } | |
396 | ||
337e51ce | 397 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 398 | { |
7d0fb0da NTND |
399 | struct strbuf sb = STRBUF_INIT; |
400 | const char *repo_config; | |
31e26ebc | 401 | config_fn_t fn; |
7d0fb0da | 402 | int ret = 0; |
337e51ce | 403 | |
00a09d57 JK |
404 | string_list_clear(&unknown_extensions, 0); |
405 | ||
31e26ebc NTND |
406 | if (get_common_dir(&sb, gitdir)) |
407 | fn = check_repo_format; | |
408 | else | |
409 | fn = check_repository_format_version; | |
e61a509a NTND |
410 | strbuf_addstr(&sb, "/config"); |
411 | repo_config = sb.buf; | |
412 | ||
337e51ce NTND |
413 | /* |
414 | * git_config() can't be used here because it calls git_pathdup() | |
415 | * to get $GIT_CONFIG/config. That call will make setup_git_env() | |
416 | * set git_dir to ".git". | |
417 | * | |
418 | * We are in gitdir setup, no git dir has been found useable yet. | |
419 | * Use a gentler version of git_config() to check if this repo | |
420 | * is a good one. | |
421 | */ | |
31e26ebc | 422 | git_config_early(fn, NULL, repo_config); |
00a09d57 | 423 | if (GIT_REPO_VERSION_READ < repository_format_version) { |
9459aa77 NTND |
424 | if (!nongit_ok) |
425 | die ("Expected git repo version <= %d, found %d", | |
00a09d57 | 426 | GIT_REPO_VERSION_READ, repository_format_version); |
9459aa77 | 427 | warning("Expected git repo version <= %d, found %d", |
00a09d57 | 428 | GIT_REPO_VERSION_READ, repository_format_version); |
9459aa77 NTND |
429 | warning("Please upgrade Git"); |
430 | *nongit_ok = -1; | |
7d0fb0da | 431 | ret = -1; |
9459aa77 | 432 | } |
00a09d57 JK |
433 | |
434 | if (repository_format_version >= 1 && unknown_extensions.nr) { | |
435 | int i; | |
436 | ||
437 | if (!nongit_ok) | |
438 | die("unknown repository extension: %s", | |
439 | unknown_extensions.items[0].string); | |
440 | ||
441 | for (i = 0; i < unknown_extensions.nr; i++) | |
442 | warning("unknown repository extension: %s", | |
443 | unknown_extensions.items[i].string); | |
444 | *nongit_ok = -1; | |
445 | ret = -1; | |
446 | } | |
447 | ||
7d0fb0da NTND |
448 | strbuf_release(&sb); |
449 | return ret; | |
9459aa77 NTND |
450 | } |
451 | ||
b44ebb19 LH |
452 | /* |
453 | * Try to read the location of the git directory from the .git file, | |
454 | * return path to git directory if found. | |
a93bedad EE |
455 | * |
456 | * On failure, if return_error_code is not NULL, return_error_code | |
457 | * will be set to an error code and NULL will be returned. If | |
458 | * return_error_code is NULL the function will die instead (for most | |
459 | * cases). | |
b44ebb19 | 460 | */ |
a93bedad | 461 | const char *read_gitfile_gently(const char *path, int *return_error_code) |
b44ebb19 | 462 | { |
921bdd96 | 463 | const int max_file_size = 1 << 20; /* 1MB */ |
a93bedad EE |
464 | int error_code = 0; |
465 | char *buf = NULL; | |
466 | char *dir = NULL; | |
40c813e0 | 467 | const char *slash; |
b44ebb19 LH |
468 | struct stat st; |
469 | int fd; | |
b1905aea | 470 | ssize_t len; |
b44ebb19 | 471 | |
a93bedad EE |
472 | if (stat(path, &st)) { |
473 | error_code = READ_GITFILE_ERR_STAT_FAILED; | |
474 | goto cleanup_return; | |
475 | } | |
476 | if (!S_ISREG(st.st_mode)) { | |
477 | error_code = READ_GITFILE_ERR_NOT_A_FILE; | |
478 | goto cleanup_return; | |
479 | } | |
921bdd96 EE |
480 | if (st.st_size > max_file_size) { |
481 | error_code = READ_GITFILE_ERR_TOO_LARGE; | |
482 | goto cleanup_return; | |
483 | } | |
b44ebb19 | 484 | fd = open(path, O_RDONLY); |
a93bedad EE |
485 | if (fd < 0) { |
486 | error_code = READ_GITFILE_ERR_OPEN_FAILED; | |
487 | goto cleanup_return; | |
488 | } | |
3733e694 | 489 | buf = xmallocz(st.st_size); |
b44ebb19 LH |
490 | len = read_in_full(fd, buf, st.st_size); |
491 | close(fd); | |
a93bedad EE |
492 | if (len != st.st_size) { |
493 | error_code = READ_GITFILE_ERR_READ_FAILED; | |
494 | goto cleanup_return; | |
495 | } | |
a93bedad EE |
496 | if (!starts_with(buf, "gitdir: ")) { |
497 | error_code = READ_GITFILE_ERR_INVALID_FORMAT; | |
498 | goto cleanup_return; | |
499 | } | |
b44ebb19 LH |
500 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') |
501 | len--; | |
a93bedad EE |
502 | if (len < 9) { |
503 | error_code = READ_GITFILE_ERR_NO_PATH; | |
504 | goto cleanup_return; | |
505 | } | |
b44ebb19 | 506 | buf[len] = '\0'; |
40c813e0 BK |
507 | dir = buf + 8; |
508 | ||
509 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
510 | size_t pathlen = slash+1 - path; | |
75faa45a JK |
511 | dir = xstrfmt("%.*s%.*s", (int)pathlen, path, |
512 | (int)(len - 8), buf + 8); | |
40c813e0 BK |
513 | free(buf); |
514 | buf = dir; | |
515 | } | |
a93bedad EE |
516 | if (!is_git_directory(dir)) { |
517 | error_code = READ_GITFILE_ERR_NOT_A_REPO; | |
518 | goto cleanup_return; | |
519 | } | |
e2a57aac | 520 | path = real_path(dir); |
40c813e0 | 521 | |
a93bedad | 522 | cleanup_return: |
a93bedad EE |
523 | if (return_error_code) |
524 | *return_error_code = error_code; | |
38ae8784 | 525 | else if (error_code) { |
a93bedad EE |
526 | switch (error_code) { |
527 | case READ_GITFILE_ERR_STAT_FAILED: | |
528 | case READ_GITFILE_ERR_NOT_A_FILE: | |
38ae8784 JK |
529 | /* non-fatal; follow return path */ |
530 | break; | |
a93bedad EE |
531 | case READ_GITFILE_ERR_OPEN_FAILED: |
532 | die_errno("Error opening '%s'", path); | |
921bdd96 EE |
533 | case READ_GITFILE_ERR_TOO_LARGE: |
534 | die("Too large to be a .git file: '%s'", path); | |
a93bedad EE |
535 | case READ_GITFILE_ERR_READ_FAILED: |
536 | die("Error reading %s", path); | |
537 | case READ_GITFILE_ERR_INVALID_FORMAT: | |
538 | die("Invalid gitfile format: %s", path); | |
539 | case READ_GITFILE_ERR_NO_PATH: | |
540 | die("No path in gitfile: %s", path); | |
541 | case READ_GITFILE_ERR_NOT_A_REPO: | |
542 | die("Not a git repository: %s", dir); | |
543 | default: | |
544 | assert(0); | |
545 | } | |
546 | } | |
547 | ||
b44ebb19 | 548 | free(buf); |
38ae8784 | 549 | return error_code ? NULL : path; |
b44ebb19 LH |
550 | } |
551 | ||
e4e30347 | 552 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 553 | struct strbuf *cwd, |
b3f66fd3 | 554 | int *nongit_ok) |
e4e30347 | 555 | { |
b3f66fd3 NTND |
556 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
557 | const char *worktree; | |
558 | char *gitfile; | |
9b125da4 | 559 | int offset; |
e4e30347 JN |
560 | |
561 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
562 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 563 | |
13d6ec91 | 564 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
565 | if (gitfile) { |
566 | gitfile = xstrdup(gitfile); | |
567 | gitdirenv = gitfile; | |
568 | } | |
569 | ||
e4e30347 JN |
570 | if (!is_git_directory(gitdirenv)) { |
571 | if (nongit_ok) { | |
572 | *nongit_ok = 1; | |
b3f66fd3 | 573 | free(gitfile); |
e4e30347 JN |
574 | return NULL; |
575 | } | |
576 | die("Not a git repository: '%s'", gitdirenv); | |
577 | } | |
b3f66fd3 NTND |
578 | |
579 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
580 | free(gitfile); | |
581 | return NULL; | |
e4e30347 | 582 | } |
b3f66fd3 NTND |
583 | |
584 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
585 | if (work_tree_env) | |
586 | set_git_work_tree(work_tree_env); | |
587 | else if (is_bare_repository_cfg > 0) { | |
fada7674 JK |
588 | if (git_work_tree_cfg) { |
589 | /* #22.2, #30 */ | |
590 | warning("core.bare and core.worktree do not make sense"); | |
591 | work_tree_config_is_bogus = 1; | |
592 | } | |
b3f66fd3 NTND |
593 | |
594 | /* #18, #26 */ | |
595 | set_git_dir(gitdirenv); | |
596 | free(gitfile); | |
e4e30347 | 597 | return NULL; |
b3f66fd3 NTND |
598 | } |
599 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
600 | if (is_absolute_path(git_work_tree_cfg)) | |
601 | set_git_work_tree(git_work_tree_cfg); | |
602 | else { | |
56b9f6e7 | 603 | char *core_worktree; |
b3f66fd3 NTND |
604 | if (chdir(gitdirenv)) |
605 | die_errno("Could not chdir to '%s'", gitdirenv); | |
606 | if (chdir(git_work_tree_cfg)) | |
607 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
56b9f6e7 | 608 | core_worktree = xgetcwd(); |
7333ed17 | 609 | if (chdir(cwd->buf)) |
b3f66fd3 NTND |
610 | die_errno("Could not come back to cwd"); |
611 | set_git_work_tree(core_worktree); | |
56b9f6e7 | 612 | free(core_worktree); |
b3f66fd3 NTND |
613 | } |
614 | } | |
2cd83d10 JK |
615 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
616 | /* #16d */ | |
617 | set_git_dir(gitdirenv); | |
618 | free(gitfile); | |
619 | return NULL; | |
620 | } | |
b3f66fd3 NTND |
621 | else /* #2, #10 */ |
622 | set_git_work_tree("."); | |
623 | ||
624 | /* set_git_work_tree() must have been called by now */ | |
625 | worktree = get_git_work_tree(); | |
626 | ||
627 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 628 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
b3f66fd3 NTND |
629 | set_git_dir(gitdirenv); |
630 | free(gitfile); | |
e4e30347 | 631 | return NULL; |
b3f66fd3 | 632 | } |
e4e30347 | 633 | |
7333ed17 | 634 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 635 | if (offset >= 0) { /* cwd inside worktree? */ |
e2a57aac | 636 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
637 | if (chdir(worktree)) |
638 | die_errno("Could not chdir to '%s'", worktree); | |
7333ed17 | 639 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 640 | free(gitfile); |
7333ed17 | 641 | return cwd->buf + offset; |
93a00542 | 642 | } |
b3f66fd3 NTND |
643 | |
644 | /* cwd outside worktree */ | |
645 | set_git_dir(gitdirenv); | |
646 | free(gitfile); | |
647 | return NULL; | |
93a00542 JN |
648 | } |
649 | ||
9951d3b3 | 650 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 651 | struct strbuf *cwd, int offset, |
9951d3b3 | 652 | int *nongit_ok) |
98937bef | 653 | { |
9951d3b3 NTND |
654 | if (check_repository_format_gently(gitdir, nongit_ok)) |
655 | return NULL; | |
98937bef | 656 | |
4868b2ea JN |
657 | /* --work-tree is set without --git-dir; use discovered one */ |
658 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
7333ed17 | 659 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
e2a57aac | 660 | gitdir = xstrdup(real_path(gitdir)); |
7333ed17 | 661 | if (chdir(cwd->buf)) |
4868b2ea | 662 | die_errno("Could not come back to cwd"); |
7333ed17 | 663 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
664 | } |
665 | ||
9951d3b3 NTND |
666 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
667 | if (is_bare_repository_cfg > 0) { | |
7333ed17 RS |
668 | set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir)); |
669 | if (chdir(cwd->buf)) | |
9951d3b3 | 670 | die_errno("Could not come back to cwd"); |
98937bef | 671 | return NULL; |
9951d3b3 | 672 | } |
98937bef | 673 | |
9951d3b3 NTND |
674 | /* #0, #1, #5, #8, #9, #12, #13 */ |
675 | set_git_work_tree("."); | |
676 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
677 | set_git_dir(gitdir); | |
98937bef | 678 | inside_git_dir = 0; |
9951d3b3 | 679 | inside_work_tree = 1; |
7333ed17 | 680 | if (offset == cwd->len) |
98937bef NTND |
681 | return NULL; |
682 | ||
683 | /* Make "offset" point to past the '/', and add a '/' at the end */ | |
684 | offset++; | |
7333ed17 RS |
685 | strbuf_addch(cwd, '/'); |
686 | return cwd->buf + offset; | |
98937bef NTND |
687 | } |
688 | ||
1cd8031b | 689 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 RS |
690 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
691 | int *nongit_ok) | |
68698da5 JN |
692 | { |
693 | int root_len; | |
694 | ||
1cd8031b NTND |
695 | if (check_repository_format_gently(".", nongit_ok)) |
696 | return NULL; | |
697 | ||
2cd83d10 JK |
698 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
699 | ||
4868b2ea JN |
700 | /* --work-tree is set without --git-dir; use discovered one */ |
701 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
702 | const char *gitdir; | |
703 | ||
7333ed17 RS |
704 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
705 | if (chdir(cwd->buf)) | |
4868b2ea | 706 | die_errno("Could not come back to cwd"); |
7333ed17 | 707 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
708 | } |
709 | ||
68698da5 | 710 | inside_git_dir = 1; |
1cd8031b | 711 | inside_work_tree = 0; |
7333ed17 RS |
712 | if (offset != cwd->len) { |
713 | if (chdir(cwd->buf)) | |
8fc0ae80 | 714 | die_errno("Cannot come back to cwd"); |
7333ed17 RS |
715 | root_len = offset_1st_component(cwd->buf); |
716 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
717 | set_git_dir(cwd->buf); | |
337e51ce | 718 | } |
1cd8031b | 719 | else |
68698da5 | 720 | set_git_dir("."); |
68698da5 JN |
721 | return NULL; |
722 | } | |
723 | ||
f161edeb JN |
724 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
725 | { | |
726 | if (!nongit_ok) | |
727 | die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); | |
728 | if (chdir(cwd)) | |
729 | die_errno("Cannot come back to cwd"); | |
730 | *nongit_ok = 1; | |
731 | return NULL; | |
732 | } | |
733 | ||
2565b43b | 734 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
735 | { |
736 | struct stat buf; | |
2565b43b CB |
737 | if (stat(path, &buf)) { |
738 | die_errno("failed to stat '%*s%s%s'", | |
739 | prefix_len, | |
60c98d1e JN |
740 | prefix ? prefix : "", |
741 | prefix ? "/" : "", path); | |
2565b43b | 742 | } |
60c98d1e JN |
743 | return buf.st_dev; |
744 | } | |
745 | ||
9e2326c7 | 746 | /* |
1b77d83c MH |
747 | * A "string_list_each_func_t" function that canonicalizes an entry |
748 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
749 | * discards it if unusable. The presence of an empty entry in |
750 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
751 | * subsequent entries. | |
9e2326c7 | 752 | */ |
1b77d83c | 753 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 754 | void *cb_data) |
9e2326c7 | 755 | { |
7ec30aaa | 756 | int *empty_entry_found = cb_data; |
1b77d83c | 757 | char *ceil = item->string; |
9e2326c7 | 758 | |
7ec30aaa MH |
759 | if (!*ceil) { |
760 | *empty_entry_found = 1; | |
9e2326c7 | 761 | return 0; |
7ec30aaa | 762 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 763 | return 0; |
7ec30aaa MH |
764 | } else if (*empty_entry_found) { |
765 | /* Keep entry but do not canonicalize it */ | |
766 | return 1; | |
767 | } else { | |
768 | const char *real_path = real_path_if_valid(ceil); | |
769 | if (!real_path) | |
770 | return 0; | |
771 | free(item->string); | |
772 | item->string = xstrdup(real_path); | |
773 | return 1; | |
774 | } | |
9e2326c7 MH |
775 | } |
776 | ||
e90fdc39 JS |
777 | /* |
778 | * We cannot decide in this function whether we are in the work tree or | |
779 | * not, since the config can only be read _after_ this function was called. | |
780 | */ | |
a60645f9 | 781 | static const char *setup_git_directory_gently_1(int *nongit_ok) |
d288a700 | 782 | { |
0454dd93 | 783 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 784 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
7333ed17 | 785 | static struct strbuf cwd = STRBUF_INIT; |
9951d3b3 NTND |
786 | const char *gitdirenv, *ret; |
787 | char *gitfile; | |
7333ed17 | 788 | int offset, offset_parent, ceil_offset = -1; |
c7d1d1b1 RH |
789 | dev_t current_device = 0; |
790 | int one_filesystem = 1; | |
d288a700 | 791 | |
3c8687a7 TA |
792 | /* |
793 | * We may have read an incomplete configuration before | |
794 | * setting-up the git directory. If so, clear the cache so | |
795 | * that the next queries to the configuration reload complete | |
796 | * configuration (including the per-repo config file that we | |
797 | * ignored previously). | |
798 | */ | |
799 | git_config_clear(); | |
800 | ||
af05d679 SG |
801 | /* |
802 | * Let's assume that we are in a git repository. | |
803 | * If it turns out later that we are somewhere else, the value will be | |
804 | * updated accordingly. | |
805 | */ | |
806 | if (nongit_ok) | |
807 | *nongit_ok = 0; | |
808 | ||
7333ed17 | 809 | if (strbuf_getcwd(&cwd)) |
b3f66fd3 | 810 | die_errno("Unable to read current working directory"); |
7333ed17 | 811 | offset = cwd.len; |
b3f66fd3 | 812 | |
e90fdc39 JS |
813 | /* |
814 | * If GIT_DIR is set explicitly, we're not going | |
815 | * to do any discovery, but we still do repository | |
816 | * validation. | |
817 | */ | |
ad1a382f | 818 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e4e30347 | 819 | if (gitdirenv) |
7333ed17 | 820 | return setup_explicit_git_dir(gitdirenv, &cwd, nongit_ok); |
d288a700 | 821 | |
31171d9e | 822 | if (env_ceiling_dirs) { |
7ec30aaa MH |
823 | int empty_entry_found = 0; |
824 | ||
31171d9e | 825 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 826 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 827 | canonicalize_ceiling_entry, &empty_entry_found); |
7333ed17 | 828 | ceil_offset = longest_ancestor_length(cwd.buf, &ceiling_dirs); |
31171d9e MH |
829 | string_list_clear(&ceiling_dirs, 0); |
830 | } | |
831 | ||
7333ed17 | 832 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd.buf)) |
17d778e7 | 833 | ceil_offset = 1; |
d288a700 | 834 | |
892c41b9 | 835 | /* |
e90fdc39 | 836 | * Test in the following order (relative to the cwd): |
b44ebb19 | 837 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
838 | * - .git/ |
839 | * - ./ (bare) | |
b44ebb19 | 840 | * - ../.git |
e90fdc39 JS |
841 | * - ../.git/ |
842 | * - ../ (bare) | |
843 | * - ../../.git/ | |
844 | * etc. | |
892c41b9 | 845 | */ |
cf87463e | 846 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 847 | if (one_filesystem) |
2565b43b | 848 | current_device = get_device_or_die(".", NULL, 0); |
e90fdc39 | 849 | for (;;) { |
13d6ec91 | 850 | gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT); |
9951d3b3 NTND |
851 | if (gitfile) |
852 | gitdirenv = gitfile = xstrdup(gitfile); | |
853 | else { | |
854 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) | |
855 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
856 | } | |
857 | ||
858 | if (gitdirenv) { | |
859 | ret = setup_discovered_git_dir(gitdirenv, | |
7333ed17 | 860 | &cwd, offset, |
9951d3b3 NTND |
861 | nongit_ok); |
862 | free(gitfile); | |
863 | return ret; | |
864 | } | |
865 | free(gitfile); | |
866 | ||
68698da5 | 867 | if (is_git_directory(".")) |
7333ed17 | 868 | return setup_bare_git_dir(&cwd, offset, nongit_ok); |
1cd8031b | 869 | |
2565b43b | 870 | offset_parent = offset; |
7333ed17 | 871 | while (--offset_parent > ceil_offset && cwd.buf[offset_parent] != '/'); |
2565b43b | 872 | if (offset_parent <= ceil_offset) |
7333ed17 | 873 | return setup_nongit(cwd.buf, nongit_ok); |
8030e442 | 874 | if (one_filesystem) { |
7333ed17 RS |
875 | dev_t parent_device = get_device_or_die("..", cwd.buf, |
876 | offset); | |
60c98d1e | 877 | if (parent_device != current_device) { |
8030e442 | 878 | if (nongit_ok) { |
7333ed17 | 879 | if (chdir(cwd.buf)) |
8030e442 LD |
880 | die_errno("Cannot come back to cwd"); |
881 | *nongit_ok = 1; | |
882 | return NULL; | |
883 | } | |
7333ed17 | 884 | strbuf_setlen(&cwd, offset); |
2565b43b | 885 | die("Not a git repository (or any parent up to mount point %s)\n" |
7333ed17 RS |
886 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", |
887 | cwd.buf); | |
8030e442 LD |
888 | } |
889 | } | |
502ffe34 | 890 | if (chdir("..")) { |
7333ed17 RS |
891 | strbuf_setlen(&cwd, offset); |
892 | die_errno("Cannot change to '%s/..'", cwd.buf); | |
502ffe34 | 893 | } |
2565b43b | 894 | offset = offset_parent; |
892c41b9 | 895 | } |
d288a700 | 896 | } |
5e7bfe25 | 897 | |
a60645f9 NTND |
898 | const char *setup_git_directory_gently(int *nongit_ok) |
899 | { | |
900 | const char *prefix; | |
901 | ||
902 | prefix = setup_git_directory_gently_1(nongit_ok); | |
1f5d271f | 903 | if (prefix) |
a6f7f9a3 | 904 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); |
1f5d271f | 905 | else |
a6f7f9a3 | 906 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
1f5d271f | 907 | |
f07d6a1a | 908 | if (startup_info) { |
a60645f9 | 909 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
f07d6a1a NTND |
910 | startup_info->prefix = prefix; |
911 | } | |
a60645f9 NTND |
912 | return prefix; |
913 | } | |
914 | ||
94df2506 JH |
915 | int git_config_perm(const char *var, const char *value) |
916 | { | |
06cbe855 HO |
917 | int i; |
918 | char *endptr; | |
919 | ||
920 | if (value == NULL) | |
921 | return PERM_GROUP; | |
922 | ||
923 | if (!strcmp(value, "umask")) | |
924 | return PERM_UMASK; | |
925 | if (!strcmp(value, "group")) | |
926 | return PERM_GROUP; | |
927 | if (!strcmp(value, "all") || | |
928 | !strcmp(value, "world") || | |
929 | !strcmp(value, "everybody")) | |
930 | return PERM_EVERYBODY; | |
931 | ||
932 | /* Parse octal numbers */ | |
933 | i = strtol(value, &endptr, 8); | |
934 | ||
935 | /* If not an octal number, maybe true/false? */ | |
936 | if (*endptr != 0) | |
937 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
938 | ||
939 | /* | |
940 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 941 | * a chmod value to restrict to. |
06cbe855 HO |
942 | */ |
943 | switch (i) { | |
944 | case PERM_UMASK: /* 0 */ | |
945 | return PERM_UMASK; | |
946 | case OLD_PERM_GROUP: /* 1 */ | |
947 | return PERM_GROUP; | |
948 | case OLD_PERM_EVERYBODY: /* 2 */ | |
949 | return PERM_EVERYBODY; | |
94df2506 | 950 | } |
06cbe855 HO |
951 | |
952 | /* A filemode value was given: 0xxx */ | |
953 | ||
954 | if ((i & 0600) != 0600) | |
955 | die("Problem with core.sharedRepository filemode value " | |
956 | "(0%.3o).\nThe owner of files must always have " | |
957 | "read and write permissions.", i); | |
958 | ||
959 | /* | |
960 | * Mask filemode value. Others can not get write permission. | |
961 | * x flags for directories are handled separately. | |
962 | */ | |
5a688fe4 | 963 | return -(i & 0666); |
94df2506 JH |
964 | } |
965 | ||
ef90d6d4 | 966 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 967 | { |
31e26ebc NTND |
968 | int ret = check_repo_format(var, value, cb); |
969 | if (ret) | |
970 | return ret; | |
971 | if (strcmp(var, "core.bare") == 0) { | |
e90fdc39 JS |
972 | is_bare_repository_cfg = git_config_bool(var, value); |
973 | if (is_bare_repository_cfg == 1) | |
974 | inside_work_tree = -1; | |
975 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
976 | if (!value) |
977 | return config_error_nonbool(var); | |
8e0f7003 | 978 | free(git_work_tree_cfg); |
e90fdc39 JS |
979 | git_work_tree_cfg = xstrdup(value); |
980 | inside_work_tree = -1; | |
981 | } | |
299726d5 | 982 | return 0; |
ab9cb76f JH |
983 | } |
984 | ||
985 | int check_repository_format(void) | |
986 | { | |
337e51ce | 987 | return check_repository_format_gently(get_git_dir(), NULL); |
ab9cb76f JH |
988 | } |
989 | ||
e1e5ec86 CB |
990 | /* |
991 | * Returns the "prefix", a path to the current working directory | |
992 | * relative to the work tree root, or NULL, if the current working | |
993 | * directory is not a strict subdirectory of the work tree root. The | |
994 | * prefix always ends with a '/' character. | |
995 | */ | |
5e7bfe25 JH |
996 | const char *setup_git_directory(void) |
997 | { | |
b3f66fd3 | 998 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 999 | } |
abc06822 FG |
1000 | |
1001 | const char *resolve_gitdir(const char *suspect) | |
1002 | { | |
1003 | if (is_git_directory(suspect)) | |
1004 | return suspect; | |
efc5fb6a | 1005 | return read_gitfile(suspect); |
abc06822 | 1006 | } |
1d999ddd TR |
1007 | |
1008 | /* if any standard file descriptor is missing open it to /dev/null */ | |
1009 | void sanitize_stdfds(void) | |
1010 | { | |
1011 | int fd = open("/dev/null", O_RDWR, 0); | |
1012 | while (fd != -1 && fd < 2) | |
1013 | fd = dup(fd); | |
1014 | if (fd == -1) | |
1015 | die_errno("open /dev/null or dup failed"); | |
1016 | if (fd > 2) | |
1017 | close(fd); | |
1018 | } | |
de0957ce NTND |
1019 | |
1020 | int daemonize(void) | |
1021 | { | |
1022 | #ifdef NO_POSIX_GOODIES | |
1023 | errno = ENOSYS; | |
1024 | return -1; | |
1025 | #else | |
1026 | switch (fork()) { | |
1027 | case 0: | |
1028 | break; | |
1029 | case -1: | |
1030 | die_errno("fork failed"); | |
1031 | default: | |
1032 | exit(0); | |
1033 | } | |
1034 | if (setsid() == -1) | |
1035 | die_errno("setsid failed"); | |
1036 | close(0); | |
1037 | close(1); | |
1038 | close(2); | |
1039 | sanitize_stdfds(); | |
1040 | return 0; | |
1041 | #endif | |
1042 | } |