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Commit | Line | Data |
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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)) { | |
655ee9ea | 91 | sanitized = xmalloc(strlen(path) + 1); |
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 CMAB |
102 | } else { |
103 | sanitized = xmalloc(len + strlen(path) + 1); | |
d089ebaa JH |
104 | if (len) |
105 | memcpy(sanitized, prefix, len); | |
106 | strcpy(sanitized + len, path); | |
645a29c4 NTND |
107 | if (remaining_prefix) |
108 | *remaining_prefix = len; | |
655ee9ea | 109 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { |
546e0fd9 JK |
110 | free(sanitized); |
111 | return NULL; | |
d089ebaa | 112 | } |
d089ebaa JH |
113 | } |
114 | return sanitized; | |
f332726e LT |
115 | } |
116 | ||
546e0fd9 JK |
117 | char *prefix_path(const char *prefix, int len, const char *path) |
118 | { | |
645a29c4 | 119 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
120 | if (!r) |
121 | die("'%s' is outside repository", path); | |
122 | return r; | |
123 | } | |
124 | ||
125 | int path_inside_repo(const char *prefix, const char *path) | |
126 | { | |
127 | int len = prefix ? strlen(prefix) : 0; | |
645a29c4 | 128 | char *r = prefix_path_gently(prefix, len, NULL, path); |
546e0fd9 JK |
129 | if (r) { |
130 | free(r); | |
131 | return 1; | |
132 | } | |
133 | return 0; | |
134 | } | |
135 | ||
c6e8c800 JH |
136 | int check_filename(const char *prefix, const char *arg) |
137 | { | |
138 | const char *name; | |
139 | struct stat st; | |
140 | ||
59556548 | 141 | if (starts_with(arg, ":/")) { |
4db86e8b NTND |
142 | if (arg[2] == '\0') /* ":/" is root dir, always exists */ |
143 | return 1; | |
144 | name = arg + 2; | |
28fcc0b7 NTND |
145 | } else if (!no_wildcard(arg)) |
146 | return 1; | |
147 | else if (prefix) | |
4db86e8b NTND |
148 | name = prefix_filename(prefix, strlen(prefix), arg); |
149 | else | |
150 | name = arg; | |
c6e8c800 JH |
151 | if (!lstat(name, &st)) |
152 | return 1; /* file exists */ | |
153 | if (errno == ENOENT || errno == ENOTDIR) | |
154 | return 0; /* file does not exist */ | |
155 | die_errno("failed to stat '%s'", arg); | |
156 | } | |
157 | ||
023e37c3 MM |
158 | static void NORETURN die_verify_filename(const char *prefix, |
159 | const char *arg, | |
160 | int diagnose_misspelt_rev) | |
009fee47 | 161 | { |
023e37c3 MM |
162 | if (!diagnose_misspelt_rev) |
163 | die("%s: no such path in the working tree.\n" | |
4d4b5739 | 164 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally.", |
023e37c3 | 165 | arg); |
0e539dca JH |
166 | /* |
167 | * Saying "'(icase)foo' does not exist in the index" when the | |
168 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
169 | * begins with a colon and is followed by a non-alnum; do not | |
8c135ea2 | 170 | * let maybe_die_on_misspelt_object_name() even trigger. |
0e539dca JH |
171 | */ |
172 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
8c135ea2 | 173 | maybe_die_on_misspelt_object_name(arg, prefix); |
0e539dca | 174 | |
009fee47 MM |
175 | /* ... or fall back the most general message. */ |
176 | die("ambiguous argument '%s': unknown revision or path not in the working tree.\n" | |
4d4b5739 MM |
177 | "Use '--' to separate paths from revisions, like this:\n" |
178 | "'git <command> [<revision>...] -- [<file>...]'", arg); | |
009fee47 MM |
179 | |
180 | } | |
181 | ||
e23d0b4a LT |
182 | /* |
183 | * Verify a filename that we got as an argument for a pathspec | |
184 | * entry. Note that a filename that begins with "-" never verifies | |
185 | * as true, because even if such a filename were to exist, we want | |
186 | * it to be preceded by the "--" marker (or we want the user to | |
187 | * use a format like "./-filename") | |
023e37c3 MM |
188 | * |
189 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
190 | * diagnosis when dying upon finding that "name" is not a pathname. | |
191 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
192 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
193 | * will only complain about an inexisting file. | |
194 | * | |
195 | * This function is typically called to check that a "file or rev" | |
196 | * argument is unambiguous. In this case, the caller will want | |
197 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
198 | * argument (which could have been a revision), and | |
199 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
200 | * saw a filename, there's not ambiguity anymore). | |
e23d0b4a | 201 | */ |
023e37c3 MM |
202 | void verify_filename(const char *prefix, |
203 | const char *arg, | |
204 | int diagnose_misspelt_rev) | |
e23d0b4a | 205 | { |
e23d0b4a LT |
206 | if (*arg == '-') |
207 | die("bad flag '%s' used after filename", arg); | |
c6e8c800 | 208 | if (check_filename(prefix, arg)) |
e23d0b4a | 209 | return; |
023e37c3 | 210 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); |
e23d0b4a LT |
211 | } |
212 | ||
ea92f41f JH |
213 | /* |
214 | * Opposite of the above: the command line did not have -- marker | |
215 | * and we parsed the arg as a refname. It should not be interpretable | |
216 | * as a filename. | |
217 | */ | |
218 | void verify_non_filename(const char *prefix, const char *arg) | |
219 | { | |
7ae3df8c | 220 | if (!is_inside_work_tree() || is_inside_git_dir()) |
68025633 | 221 | return; |
ea92f41f JH |
222 | if (*arg == '-') |
223 | return; /* flag */ | |
c6e8c800 JH |
224 | if (!check_filename(prefix, arg)) |
225 | return; | |
226 | die("ambiguous argument '%s': both revision and filename\n" | |
4d4b5739 MM |
227 | "Use '--' to separate paths from revisions, like this:\n" |
228 | "'git <command> [<revision>...] -- [<file>...]'", arg); | |
ea92f41f JH |
229 | } |
230 | ||
31e26ebc | 231 | int get_common_dir(struct strbuf *sb, const char *gitdir) |
4dc4e145 NTND |
232 | { |
233 | struct strbuf data = STRBUF_INIT; | |
234 | struct strbuf path = STRBUF_INIT; | |
235 | const char *git_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
31e26ebc | 236 | int ret = 0; |
4dc4e145 NTND |
237 | if (git_common_dir) { |
238 | strbuf_addstr(sb, git_common_dir); | |
31e26ebc | 239 | return 1; |
4dc4e145 NTND |
240 | } |
241 | strbuf_addf(&path, "%s/commondir", gitdir); | |
242 | if (file_exists(path.buf)) { | |
243 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
244 | die_errno(_("failed to read %s"), path.buf); | |
245 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
246 | data.buf[data.len - 1] == '\r')) | |
247 | data.len--; | |
248 | data.buf[data.len] = '\0'; | |
249 | strbuf_reset(&path); | |
250 | if (!is_absolute_path(data.buf)) | |
251 | strbuf_addf(&path, "%s/", gitdir); | |
252 | strbuf_addbuf(&path, &data); | |
253 | strbuf_addstr(sb, real_path(path.buf)); | |
31e26ebc | 254 | ret = 1; |
4dc4e145 NTND |
255 | } else |
256 | strbuf_addstr(sb, gitdir); | |
257 | strbuf_release(&data); | |
258 | strbuf_release(&path); | |
31e26ebc | 259 | return ret; |
4dc4e145 | 260 | } |
d288a700 | 261 | |
5f5608bc | 262 | /* |
ad1a382f | 263 | * Test if it looks like we're at a git directory. |
5e7bfe25 | 264 | * We want to see: |
5f5608bc | 265 | * |
790296fd | 266 | * - either an objects/ directory _or_ the proper |
5f5608bc | 267 | * GIT_OBJECT_DIRECTORY environment variable |
ad1a382f | 268 | * - a refs/ directory |
8098a178 | 269 | * - either a HEAD symlink or a HEAD file that is formatted as |
c847f537 JH |
270 | * a proper "ref:", or a regular file HEAD that has a properly |
271 | * formatted sha1 object name. | |
5f5608bc | 272 | */ |
b3256eb8 | 273 | int is_git_directory(const char *suspect) |
5f5608bc | 274 | { |
1d186b6f NTND |
275 | struct strbuf path = STRBUF_INIT; |
276 | int ret = 0; | |
277 | size_t len; | |
ad1a382f | 278 | |
4dc4e145 NTND |
279 | /* Check worktree-related signatures */ |
280 | strbuf_addf(&path, "%s/HEAD", suspect); | |
281 | if (validate_headref(path.buf)) | |
282 | goto done; | |
283 | ||
284 | strbuf_reset(&path); | |
285 | get_common_dir(&path, suspect); | |
1d186b6f | 286 | len = path.len; |
4dc4e145 NTND |
287 | |
288 | /* Check non-worktree-related signatures */ | |
ad1a382f SP |
289 | if (getenv(DB_ENVIRONMENT)) { |
290 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
1d186b6f | 291 | goto done; |
ad1a382f SP |
292 | } |
293 | else { | |
4dc4e145 | 294 | strbuf_setlen(&path, len); |
1d186b6f NTND |
295 | strbuf_addstr(&path, "/objects"); |
296 | if (access(path.buf, X_OK)) | |
297 | goto done; | |
ad1a382f SP |
298 | } |
299 | ||
1d186b6f NTND |
300 | strbuf_setlen(&path, len); |
301 | strbuf_addstr(&path, "/refs"); | |
302 | if (access(path.buf, X_OK)) | |
303 | goto done; | |
ad1a382f | 304 | |
1d186b6f NTND |
305 | ret = 1; |
306 | done: | |
307 | strbuf_release(&path); | |
308 | return ret; | |
5f5608bc LT |
309 | } |
310 | ||
68025633 JS |
311 | int is_inside_git_dir(void) |
312 | { | |
e90fdc39 JS |
313 | if (inside_git_dir < 0) |
314 | inside_git_dir = is_inside_dir(get_git_dir()); | |
315 | return inside_git_dir; | |
892c41b9 ML |
316 | } |
317 | ||
892c41b9 ML |
318 | int is_inside_work_tree(void) |
319 | { | |
e90fdc39 JS |
320 | if (inside_work_tree < 0) |
321 | inside_work_tree = is_inside_dir(get_git_work_tree()); | |
322 | return inside_work_tree; | |
892c41b9 ML |
323 | } |
324 | ||
f3fa1838 JH |
325 | void setup_work_tree(void) |
326 | { | |
354e6534 JS |
327 | const char *work_tree, *git_dir; |
328 | static int initialized = 0; | |
329 | ||
330 | if (initialized) | |
331 | return; | |
fada7674 JK |
332 | |
333 | if (work_tree_config_is_bogus) | |
334 | die("unable to set up work tree using invalid config"); | |
335 | ||
354e6534 JS |
336 | work_tree = get_git_work_tree(); |
337 | git_dir = get_git_dir(); | |
59f0f2f3 | 338 | if (!is_absolute_path(git_dir)) |
e2a57aac | 339 | git_dir = real_path(get_git_dir()); |
59f0f2f3 MH |
340 | if (!work_tree || chdir(work_tree)) |
341 | die("This operation must be run in a work tree"); | |
0ed74813 NTND |
342 | |
343 | /* | |
344 | * Make sure subsequent git processes find correct worktree | |
345 | * if $GIT_WORK_TREE is set relative | |
346 | */ | |
347 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
348 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
349 | ||
41894ae3 | 350 | set_git_dir(remove_leading_path(git_dir, work_tree)); |
354e6534 | 351 | initialized = 1; |
59f0f2f3 MH |
352 | } |
353 | ||
31e26ebc NTND |
354 | static int check_repo_format(const char *var, const char *value, void *cb) |
355 | { | |
00a09d57 JK |
356 | const char *ext; |
357 | ||
31e26ebc NTND |
358 | if (strcmp(var, "core.repositoryformatversion") == 0) |
359 | repository_format_version = git_config_int(var, value); | |
360 | else if (strcmp(var, "core.sharedrepository") == 0) | |
361 | shared_repository = git_config_perm(var, value); | |
00a09d57 JK |
362 | else if (skip_prefix(var, "extensions.", &ext)) { |
363 | /* | |
364 | * record any known extensions here; otherwise, | |
365 | * we fall through to recording it as unknown, and | |
366 | * check_repository_format will complain | |
367 | */ | |
368 | if (!strcmp(ext, "noop")) | |
369 | ; | |
067fbd41 JK |
370 | else if (!strcmp(ext, "preciousobjects")) |
371 | repository_format_precious_objects = git_config_bool(var, value); | |
00a09d57 JK |
372 | else |
373 | string_list_append(&unknown_extensions, ext); | |
374 | } | |
31e26ebc NTND |
375 | return 0; |
376 | } | |
377 | ||
337e51ce | 378 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) |
9459aa77 | 379 | { |
7d0fb0da NTND |
380 | struct strbuf sb = STRBUF_INIT; |
381 | const char *repo_config; | |
31e26ebc | 382 | config_fn_t fn; |
7d0fb0da | 383 | int ret = 0; |
337e51ce | 384 | |
00a09d57 JK |
385 | string_list_clear(&unknown_extensions, 0); |
386 | ||
31e26ebc NTND |
387 | if (get_common_dir(&sb, gitdir)) |
388 | fn = check_repo_format; | |
389 | else | |
390 | fn = check_repository_format_version; | |
e61a509a NTND |
391 | strbuf_addstr(&sb, "/config"); |
392 | repo_config = sb.buf; | |
393 | ||
337e51ce NTND |
394 | /* |
395 | * git_config() can't be used here because it calls git_pathdup() | |
396 | * to get $GIT_CONFIG/config. That call will make setup_git_env() | |
397 | * set git_dir to ".git". | |
398 | * | |
399 | * We are in gitdir setup, no git dir has been found useable yet. | |
400 | * Use a gentler version of git_config() to check if this repo | |
401 | * is a good one. | |
402 | */ | |
31e26ebc | 403 | git_config_early(fn, NULL, repo_config); |
00a09d57 | 404 | if (GIT_REPO_VERSION_READ < repository_format_version) { |
9459aa77 NTND |
405 | if (!nongit_ok) |
406 | die ("Expected git repo version <= %d, found %d", | |
00a09d57 | 407 | GIT_REPO_VERSION_READ, repository_format_version); |
9459aa77 | 408 | warning("Expected git repo version <= %d, found %d", |
00a09d57 | 409 | GIT_REPO_VERSION_READ, repository_format_version); |
9459aa77 NTND |
410 | warning("Please upgrade Git"); |
411 | *nongit_ok = -1; | |
7d0fb0da | 412 | ret = -1; |
9459aa77 | 413 | } |
00a09d57 JK |
414 | |
415 | if (repository_format_version >= 1 && unknown_extensions.nr) { | |
416 | int i; | |
417 | ||
418 | if (!nongit_ok) | |
419 | die("unknown repository extension: %s", | |
420 | unknown_extensions.items[0].string); | |
421 | ||
422 | for (i = 0; i < unknown_extensions.nr; i++) | |
423 | warning("unknown repository extension: %s", | |
424 | unknown_extensions.items[i].string); | |
425 | *nongit_ok = -1; | |
426 | ret = -1; | |
427 | } | |
428 | ||
7d0fb0da NTND |
429 | strbuf_release(&sb); |
430 | return ret; | |
9459aa77 NTND |
431 | } |
432 | ||
23af91d1 NTND |
433 | static void update_linked_gitdir(const char *gitfile, const char *gitdir) |
434 | { | |
435 | struct strbuf path = STRBUF_INIT; | |
436 | struct stat st; | |
437 | ||
82fde87f | 438 | strbuf_addf(&path, "%s/gitdir", gitdir); |
23af91d1 | 439 | if (stat(path.buf, &st) || st.st_mtime + 24 * 3600 < time(NULL)) |
91d54694 | 440 | write_file(path.buf, "%s", gitfile); |
23af91d1 NTND |
441 | strbuf_release(&path); |
442 | } | |
443 | ||
b44ebb19 LH |
444 | /* |
445 | * Try to read the location of the git directory from the .git file, | |
446 | * return path to git directory if found. | |
a93bedad EE |
447 | * |
448 | * On failure, if return_error_code is not NULL, return_error_code | |
449 | * will be set to an error code and NULL will be returned. If | |
450 | * return_error_code is NULL the function will die instead (for most | |
451 | * cases). | |
b44ebb19 | 452 | */ |
a93bedad | 453 | const char *read_gitfile_gently(const char *path, int *return_error_code) |
b44ebb19 | 454 | { |
921bdd96 | 455 | const int max_file_size = 1 << 20; /* 1MB */ |
a93bedad EE |
456 | int error_code = 0; |
457 | char *buf = NULL; | |
458 | char *dir = NULL; | |
40c813e0 | 459 | const char *slash; |
b44ebb19 LH |
460 | struct stat st; |
461 | int fd; | |
b1905aea | 462 | ssize_t len; |
b44ebb19 | 463 | |
a93bedad EE |
464 | if (stat(path, &st)) { |
465 | error_code = READ_GITFILE_ERR_STAT_FAILED; | |
466 | goto cleanup_return; | |
467 | } | |
468 | if (!S_ISREG(st.st_mode)) { | |
469 | error_code = READ_GITFILE_ERR_NOT_A_FILE; | |
470 | goto cleanup_return; | |
471 | } | |
921bdd96 EE |
472 | if (st.st_size > max_file_size) { |
473 | error_code = READ_GITFILE_ERR_TOO_LARGE; | |
474 | goto cleanup_return; | |
475 | } | |
b44ebb19 | 476 | fd = open(path, O_RDONLY); |
a93bedad EE |
477 | if (fd < 0) { |
478 | error_code = READ_GITFILE_ERR_OPEN_FAILED; | |
479 | goto cleanup_return; | |
480 | } | |
b44ebb19 LH |
481 | buf = xmalloc(st.st_size + 1); |
482 | len = read_in_full(fd, buf, st.st_size); | |
483 | close(fd); | |
a93bedad EE |
484 | if (len != st.st_size) { |
485 | error_code = READ_GITFILE_ERR_READ_FAILED; | |
486 | goto cleanup_return; | |
487 | } | |
b44ebb19 | 488 | buf[len] = '\0'; |
a93bedad EE |
489 | if (!starts_with(buf, "gitdir: ")) { |
490 | error_code = READ_GITFILE_ERR_INVALID_FORMAT; | |
491 | goto cleanup_return; | |
492 | } | |
b44ebb19 LH |
493 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') |
494 | len--; | |
a93bedad EE |
495 | if (len < 9) { |
496 | error_code = READ_GITFILE_ERR_NO_PATH; | |
497 | goto cleanup_return; | |
498 | } | |
b44ebb19 | 499 | buf[len] = '\0'; |
40c813e0 BK |
500 | dir = buf + 8; |
501 | ||
502 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
503 | size_t pathlen = slash+1 - path; | |
504 | size_t dirlen = pathlen + len - 8; | |
505 | dir = xmalloc(dirlen + 1); | |
506 | strncpy(dir, path, pathlen); | |
507 | strncpy(dir + pathlen, buf + 8, len - 8); | |
508 | dir[dirlen] = '\0'; | |
509 | free(buf); | |
510 | buf = dir; | |
511 | } | |
a93bedad EE |
512 | if (!is_git_directory(dir)) { |
513 | error_code = READ_GITFILE_ERR_NOT_A_REPO; | |
514 | goto cleanup_return; | |
515 | } | |
23af91d1 | 516 | update_linked_gitdir(path, dir); |
e2a57aac | 517 | path = real_path(dir); |
40c813e0 | 518 | |
a93bedad | 519 | cleanup_return: |
a93bedad EE |
520 | if (return_error_code) |
521 | *return_error_code = error_code; | |
38ae8784 | 522 | else if (error_code) { |
a93bedad EE |
523 | switch (error_code) { |
524 | case READ_GITFILE_ERR_STAT_FAILED: | |
525 | case READ_GITFILE_ERR_NOT_A_FILE: | |
38ae8784 JK |
526 | /* non-fatal; follow return path */ |
527 | break; | |
a93bedad EE |
528 | case READ_GITFILE_ERR_OPEN_FAILED: |
529 | die_errno("Error opening '%s'", path); | |
921bdd96 EE |
530 | case READ_GITFILE_ERR_TOO_LARGE: |
531 | die("Too large to be a .git file: '%s'", path); | |
a93bedad EE |
532 | case READ_GITFILE_ERR_READ_FAILED: |
533 | die("Error reading %s", path); | |
534 | case READ_GITFILE_ERR_INVALID_FORMAT: | |
535 | die("Invalid gitfile format: %s", path); | |
536 | case READ_GITFILE_ERR_NO_PATH: | |
537 | die("No path in gitfile: %s", path); | |
538 | case READ_GITFILE_ERR_NOT_A_REPO: | |
539 | die("Not a git repository: %s", dir); | |
540 | default: | |
541 | assert(0); | |
542 | } | |
543 | } | |
544 | ||
b44ebb19 | 545 | free(buf); |
38ae8784 | 546 | return error_code ? NULL : path; |
b44ebb19 LH |
547 | } |
548 | ||
e4e30347 | 549 | static const char *setup_explicit_git_dir(const char *gitdirenv, |
7333ed17 | 550 | struct strbuf *cwd, |
b3f66fd3 | 551 | int *nongit_ok) |
e4e30347 | 552 | { |
b3f66fd3 NTND |
553 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); |
554 | const char *worktree; | |
555 | char *gitfile; | |
9b125da4 | 556 | int offset; |
e4e30347 JN |
557 | |
558 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
559 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
b3f66fd3 | 560 | |
13d6ec91 | 561 | gitfile = (char*)read_gitfile(gitdirenv); |
b3f66fd3 NTND |
562 | if (gitfile) { |
563 | gitfile = xstrdup(gitfile); | |
564 | gitdirenv = gitfile; | |
565 | } | |
566 | ||
e4e30347 JN |
567 | if (!is_git_directory(gitdirenv)) { |
568 | if (nongit_ok) { | |
569 | *nongit_ok = 1; | |
b3f66fd3 | 570 | free(gitfile); |
e4e30347 JN |
571 | return NULL; |
572 | } | |
573 | die("Not a git repository: '%s'", gitdirenv); | |
574 | } | |
b3f66fd3 NTND |
575 | |
576 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
577 | free(gitfile); | |
578 | return NULL; | |
e4e30347 | 579 | } |
b3f66fd3 NTND |
580 | |
581 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
582 | if (work_tree_env) | |
583 | set_git_work_tree(work_tree_env); | |
584 | else if (is_bare_repository_cfg > 0) { | |
fada7674 JK |
585 | if (git_work_tree_cfg) { |
586 | /* #22.2, #30 */ | |
587 | warning("core.bare and core.worktree do not make sense"); | |
588 | work_tree_config_is_bogus = 1; | |
589 | } | |
b3f66fd3 NTND |
590 | |
591 | /* #18, #26 */ | |
592 | set_git_dir(gitdirenv); | |
593 | free(gitfile); | |
e4e30347 | 594 | return NULL; |
b3f66fd3 NTND |
595 | } |
596 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
597 | if (is_absolute_path(git_work_tree_cfg)) | |
598 | set_git_work_tree(git_work_tree_cfg); | |
599 | else { | |
56b9f6e7 | 600 | char *core_worktree; |
b3f66fd3 NTND |
601 | if (chdir(gitdirenv)) |
602 | die_errno("Could not chdir to '%s'", gitdirenv); | |
603 | if (chdir(git_work_tree_cfg)) | |
604 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
56b9f6e7 | 605 | core_worktree = xgetcwd(); |
7333ed17 | 606 | if (chdir(cwd->buf)) |
b3f66fd3 NTND |
607 | die_errno("Could not come back to cwd"); |
608 | set_git_work_tree(core_worktree); | |
56b9f6e7 | 609 | free(core_worktree); |
b3f66fd3 NTND |
610 | } |
611 | } | |
2cd83d10 JK |
612 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { |
613 | /* #16d */ | |
614 | set_git_dir(gitdirenv); | |
615 | free(gitfile); | |
616 | return NULL; | |
617 | } | |
b3f66fd3 NTND |
618 | else /* #2, #10 */ |
619 | set_git_work_tree("."); | |
620 | ||
621 | /* set_git_work_tree() must have been called by now */ | |
622 | worktree = get_git_work_tree(); | |
623 | ||
624 | /* both get_git_work_tree() and cwd are already normalized */ | |
7333ed17 | 625 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ |
b3f66fd3 NTND |
626 | set_git_dir(gitdirenv); |
627 | free(gitfile); | |
e4e30347 | 628 | return NULL; |
b3f66fd3 | 629 | } |
e4e30347 | 630 | |
7333ed17 | 631 | offset = dir_inside_of(cwd->buf, worktree); |
9b125da4 | 632 | if (offset >= 0) { /* cwd inside worktree? */ |
e2a57aac | 633 | set_git_dir(real_path(gitdirenv)); |
b3f66fd3 NTND |
634 | if (chdir(worktree)) |
635 | die_errno("Could not chdir to '%s'", worktree); | |
7333ed17 | 636 | strbuf_addch(cwd, '/'); |
b3f66fd3 | 637 | free(gitfile); |
7333ed17 | 638 | return cwd->buf + offset; |
93a00542 | 639 | } |
b3f66fd3 NTND |
640 | |
641 | /* cwd outside worktree */ | |
642 | set_git_dir(gitdirenv); | |
643 | free(gitfile); | |
644 | return NULL; | |
93a00542 JN |
645 | } |
646 | ||
9951d3b3 | 647 | static const char *setup_discovered_git_dir(const char *gitdir, |
7333ed17 | 648 | struct strbuf *cwd, int offset, |
9951d3b3 | 649 | int *nongit_ok) |
98937bef | 650 | { |
9951d3b3 NTND |
651 | if (check_repository_format_gently(gitdir, nongit_ok)) |
652 | return NULL; | |
98937bef | 653 | |
4868b2ea JN |
654 | /* --work-tree is set without --git-dir; use discovered one */ |
655 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
7333ed17 | 656 | if (offset != cwd->len && !is_absolute_path(gitdir)) |
e2a57aac | 657 | gitdir = xstrdup(real_path(gitdir)); |
7333ed17 | 658 | if (chdir(cwd->buf)) |
4868b2ea | 659 | die_errno("Could not come back to cwd"); |
7333ed17 | 660 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
661 | } |
662 | ||
9951d3b3 NTND |
663 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ |
664 | if (is_bare_repository_cfg > 0) { | |
7333ed17 RS |
665 | set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir)); |
666 | if (chdir(cwd->buf)) | |
9951d3b3 | 667 | die_errno("Could not come back to cwd"); |
98937bef | 668 | return NULL; |
9951d3b3 | 669 | } |
98937bef | 670 | |
9951d3b3 NTND |
671 | /* #0, #1, #5, #8, #9, #12, #13 */ |
672 | set_git_work_tree("."); | |
673 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
674 | set_git_dir(gitdir); | |
98937bef | 675 | inside_git_dir = 0; |
9951d3b3 | 676 | inside_work_tree = 1; |
7333ed17 | 677 | if (offset == cwd->len) |
98937bef NTND |
678 | return NULL; |
679 | ||
680 | /* Make "offset" point to past the '/', and add a '/' at the end */ | |
681 | offset++; | |
7333ed17 RS |
682 | strbuf_addch(cwd, '/'); |
683 | return cwd->buf + offset; | |
98937bef NTND |
684 | } |
685 | ||
1cd8031b | 686 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ |
7333ed17 RS |
687 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, |
688 | int *nongit_ok) | |
68698da5 JN |
689 | { |
690 | int root_len; | |
691 | ||
1cd8031b NTND |
692 | if (check_repository_format_gently(".", nongit_ok)) |
693 | return NULL; | |
694 | ||
2cd83d10 JK |
695 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); |
696 | ||
4868b2ea JN |
697 | /* --work-tree is set without --git-dir; use discovered one */ |
698 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
699 | const char *gitdir; | |
700 | ||
7333ed17 RS |
701 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); |
702 | if (chdir(cwd->buf)) | |
4868b2ea | 703 | die_errno("Could not come back to cwd"); |
7333ed17 | 704 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); |
4868b2ea JN |
705 | } |
706 | ||
68698da5 | 707 | inside_git_dir = 1; |
1cd8031b | 708 | inside_work_tree = 0; |
7333ed17 RS |
709 | if (offset != cwd->len) { |
710 | if (chdir(cwd->buf)) | |
8fc0ae80 | 711 | die_errno("Cannot come back to cwd"); |
7333ed17 RS |
712 | root_len = offset_1st_component(cwd->buf); |
713 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
714 | set_git_dir(cwd->buf); | |
337e51ce | 715 | } |
1cd8031b | 716 | else |
68698da5 | 717 | set_git_dir("."); |
68698da5 JN |
718 | return NULL; |
719 | } | |
720 | ||
f161edeb JN |
721 | static const char *setup_nongit(const char *cwd, int *nongit_ok) |
722 | { | |
723 | if (!nongit_ok) | |
724 | die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT); | |
725 | if (chdir(cwd)) | |
726 | die_errno("Cannot come back to cwd"); | |
727 | *nongit_ok = 1; | |
728 | return NULL; | |
729 | } | |
730 | ||
2565b43b | 731 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) |
60c98d1e JN |
732 | { |
733 | struct stat buf; | |
2565b43b CB |
734 | if (stat(path, &buf)) { |
735 | die_errno("failed to stat '%*s%s%s'", | |
736 | prefix_len, | |
60c98d1e JN |
737 | prefix ? prefix : "", |
738 | prefix ? "/" : "", path); | |
2565b43b | 739 | } |
60c98d1e JN |
740 | return buf.st_dev; |
741 | } | |
742 | ||
9e2326c7 | 743 | /* |
1b77d83c MH |
744 | * A "string_list_each_func_t" function that canonicalizes an entry |
745 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
7ec30aaa MH |
746 | * discards it if unusable. The presence of an empty entry in |
747 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
748 | * subsequent entries. | |
9e2326c7 | 749 | */ |
1b77d83c | 750 | static int canonicalize_ceiling_entry(struct string_list_item *item, |
7ec30aaa | 751 | void *cb_data) |
9e2326c7 | 752 | { |
7ec30aaa | 753 | int *empty_entry_found = cb_data; |
1b77d83c | 754 | char *ceil = item->string; |
9e2326c7 | 755 | |
7ec30aaa MH |
756 | if (!*ceil) { |
757 | *empty_entry_found = 1; | |
9e2326c7 | 758 | return 0; |
7ec30aaa | 759 | } else if (!is_absolute_path(ceil)) { |
9e2326c7 | 760 | return 0; |
7ec30aaa MH |
761 | } else if (*empty_entry_found) { |
762 | /* Keep entry but do not canonicalize it */ | |
763 | return 1; | |
764 | } else { | |
765 | const char *real_path = real_path_if_valid(ceil); | |
766 | if (!real_path) | |
767 | return 0; | |
768 | free(item->string); | |
769 | item->string = xstrdup(real_path); | |
770 | return 1; | |
771 | } | |
9e2326c7 MH |
772 | } |
773 | ||
e90fdc39 JS |
774 | /* |
775 | * We cannot decide in this function whether we are in the work tree or | |
776 | * not, since the config can only be read _after_ this function was called. | |
777 | */ | |
a60645f9 | 778 | static const char *setup_git_directory_gently_1(int *nongit_ok) |
d288a700 | 779 | { |
0454dd93 | 780 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); |
31171d9e | 781 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; |
7333ed17 | 782 | static struct strbuf cwd = STRBUF_INIT; |
9951d3b3 NTND |
783 | const char *gitdirenv, *ret; |
784 | char *gitfile; | |
7333ed17 | 785 | int offset, offset_parent, ceil_offset = -1; |
c7d1d1b1 RH |
786 | dev_t current_device = 0; |
787 | int one_filesystem = 1; | |
d288a700 | 788 | |
3c8687a7 TA |
789 | /* |
790 | * We may have read an incomplete configuration before | |
791 | * setting-up the git directory. If so, clear the cache so | |
792 | * that the next queries to the configuration reload complete | |
793 | * configuration (including the per-repo config file that we | |
794 | * ignored previously). | |
795 | */ | |
796 | git_config_clear(); | |
797 | ||
af05d679 SG |
798 | /* |
799 | * Let's assume that we are in a git repository. | |
800 | * If it turns out later that we are somewhere else, the value will be | |
801 | * updated accordingly. | |
802 | */ | |
803 | if (nongit_ok) | |
804 | *nongit_ok = 0; | |
805 | ||
7333ed17 | 806 | if (strbuf_getcwd(&cwd)) |
b3f66fd3 | 807 | die_errno("Unable to read current working directory"); |
7333ed17 | 808 | offset = cwd.len; |
b3f66fd3 | 809 | |
e90fdc39 JS |
810 | /* |
811 | * If GIT_DIR is set explicitly, we're not going | |
812 | * to do any discovery, but we still do repository | |
813 | * validation. | |
814 | */ | |
ad1a382f | 815 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); |
e4e30347 | 816 | if (gitdirenv) |
7333ed17 | 817 | return setup_explicit_git_dir(gitdirenv, &cwd, nongit_ok); |
d288a700 | 818 | |
31171d9e | 819 | if (env_ceiling_dirs) { |
7ec30aaa MH |
820 | int empty_entry_found = 0; |
821 | ||
31171d9e | 822 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); |
1b77d83c | 823 | filter_string_list(&ceiling_dirs, 0, |
7ec30aaa | 824 | canonicalize_ceiling_entry, &empty_entry_found); |
7333ed17 | 825 | ceil_offset = longest_ancestor_length(cwd.buf, &ceiling_dirs); |
31171d9e MH |
826 | string_list_clear(&ceiling_dirs, 0); |
827 | } | |
828 | ||
7333ed17 | 829 | if (ceil_offset < 0 && has_dos_drive_prefix(cwd.buf)) |
17d778e7 | 830 | ceil_offset = 1; |
d288a700 | 831 | |
892c41b9 | 832 | /* |
e90fdc39 | 833 | * Test in the following order (relative to the cwd): |
b44ebb19 | 834 | * - .git (file containing "gitdir: <path>") |
e90fdc39 JS |
835 | * - .git/ |
836 | * - ./ (bare) | |
b44ebb19 | 837 | * - ../.git |
e90fdc39 JS |
838 | * - ../.git/ |
839 | * - ../ (bare) | |
840 | * - ../../.git/ | |
841 | * etc. | |
892c41b9 | 842 | */ |
cf87463e | 843 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); |
60c98d1e | 844 | if (one_filesystem) |
2565b43b | 845 | current_device = get_device_or_die(".", NULL, 0); |
e90fdc39 | 846 | for (;;) { |
13d6ec91 | 847 | gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT); |
9951d3b3 NTND |
848 | if (gitfile) |
849 | gitdirenv = gitfile = xstrdup(gitfile); | |
850 | else { | |
851 | if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) | |
852 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
853 | } | |
854 | ||
855 | if (gitdirenv) { | |
856 | ret = setup_discovered_git_dir(gitdirenv, | |
7333ed17 | 857 | &cwd, offset, |
9951d3b3 NTND |
858 | nongit_ok); |
859 | free(gitfile); | |
860 | return ret; | |
861 | } | |
862 | free(gitfile); | |
863 | ||
68698da5 | 864 | if (is_git_directory(".")) |
7333ed17 | 865 | return setup_bare_git_dir(&cwd, offset, nongit_ok); |
1cd8031b | 866 | |
2565b43b | 867 | offset_parent = offset; |
7333ed17 | 868 | while (--offset_parent > ceil_offset && cwd.buf[offset_parent] != '/'); |
2565b43b | 869 | if (offset_parent <= ceil_offset) |
7333ed17 | 870 | return setup_nongit(cwd.buf, nongit_ok); |
8030e442 | 871 | if (one_filesystem) { |
7333ed17 RS |
872 | dev_t parent_device = get_device_or_die("..", cwd.buf, |
873 | offset); | |
60c98d1e | 874 | if (parent_device != current_device) { |
8030e442 | 875 | if (nongit_ok) { |
7333ed17 | 876 | if (chdir(cwd.buf)) |
8030e442 LD |
877 | die_errno("Cannot come back to cwd"); |
878 | *nongit_ok = 1; | |
879 | return NULL; | |
880 | } | |
7333ed17 | 881 | strbuf_setlen(&cwd, offset); |
2565b43b | 882 | die("Not a git repository (or any parent up to mount point %s)\n" |
7333ed17 RS |
883 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", |
884 | cwd.buf); | |
8030e442 LD |
885 | } |
886 | } | |
502ffe34 | 887 | if (chdir("..")) { |
7333ed17 RS |
888 | strbuf_setlen(&cwd, offset); |
889 | die_errno("Cannot change to '%s/..'", cwd.buf); | |
502ffe34 | 890 | } |
2565b43b | 891 | offset = offset_parent; |
892c41b9 | 892 | } |
d288a700 | 893 | } |
5e7bfe25 | 894 | |
a60645f9 NTND |
895 | const char *setup_git_directory_gently(int *nongit_ok) |
896 | { | |
897 | const char *prefix; | |
898 | ||
899 | prefix = setup_git_directory_gently_1(nongit_ok); | |
1f5d271f | 900 | if (prefix) |
a6f7f9a3 | 901 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); |
1f5d271f | 902 | else |
a6f7f9a3 | 903 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); |
1f5d271f | 904 | |
f07d6a1a | 905 | if (startup_info) { |
a60645f9 | 906 | startup_info->have_repository = !nongit_ok || !*nongit_ok; |
f07d6a1a NTND |
907 | startup_info->prefix = prefix; |
908 | } | |
a60645f9 NTND |
909 | return prefix; |
910 | } | |
911 | ||
94df2506 JH |
912 | int git_config_perm(const char *var, const char *value) |
913 | { | |
06cbe855 HO |
914 | int i; |
915 | char *endptr; | |
916 | ||
917 | if (value == NULL) | |
918 | return PERM_GROUP; | |
919 | ||
920 | if (!strcmp(value, "umask")) | |
921 | return PERM_UMASK; | |
922 | if (!strcmp(value, "group")) | |
923 | return PERM_GROUP; | |
924 | if (!strcmp(value, "all") || | |
925 | !strcmp(value, "world") || | |
926 | !strcmp(value, "everybody")) | |
927 | return PERM_EVERYBODY; | |
928 | ||
929 | /* Parse octal numbers */ | |
930 | i = strtol(value, &endptr, 8); | |
931 | ||
932 | /* If not an octal number, maybe true/false? */ | |
933 | if (*endptr != 0) | |
934 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
935 | ||
936 | /* | |
937 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
5a688fe4 | 938 | * a chmod value to restrict to. |
06cbe855 HO |
939 | */ |
940 | switch (i) { | |
941 | case PERM_UMASK: /* 0 */ | |
942 | return PERM_UMASK; | |
943 | case OLD_PERM_GROUP: /* 1 */ | |
944 | return PERM_GROUP; | |
945 | case OLD_PERM_EVERYBODY: /* 2 */ | |
946 | return PERM_EVERYBODY; | |
94df2506 | 947 | } |
06cbe855 HO |
948 | |
949 | /* A filemode value was given: 0xxx */ | |
950 | ||
951 | if ((i & 0600) != 0600) | |
952 | die("Problem with core.sharedRepository filemode value " | |
953 | "(0%.3o).\nThe owner of files must always have " | |
954 | "read and write permissions.", i); | |
955 | ||
956 | /* | |
957 | * Mask filemode value. Others can not get write permission. | |
958 | * x flags for directories are handled separately. | |
959 | */ | |
5a688fe4 | 960 | return -(i & 0666); |
94df2506 JH |
961 | } |
962 | ||
ef90d6d4 | 963 | int check_repository_format_version(const char *var, const char *value, void *cb) |
ab9cb76f | 964 | { |
31e26ebc NTND |
965 | int ret = check_repo_format(var, value, cb); |
966 | if (ret) | |
967 | return ret; | |
968 | if (strcmp(var, "core.bare") == 0) { | |
e90fdc39 JS |
969 | is_bare_repository_cfg = git_config_bool(var, value); |
970 | if (is_bare_repository_cfg == 1) | |
971 | inside_work_tree = -1; | |
972 | } else if (strcmp(var, "core.worktree") == 0) { | |
180483c5 JH |
973 | if (!value) |
974 | return config_error_nonbool(var); | |
8e0f7003 | 975 | free(git_work_tree_cfg); |
e90fdc39 JS |
976 | git_work_tree_cfg = xstrdup(value); |
977 | inside_work_tree = -1; | |
978 | } | |
299726d5 | 979 | return 0; |
ab9cb76f JH |
980 | } |
981 | ||
982 | int check_repository_format(void) | |
983 | { | |
337e51ce | 984 | return check_repository_format_gently(get_git_dir(), NULL); |
ab9cb76f JH |
985 | } |
986 | ||
e1e5ec86 CB |
987 | /* |
988 | * Returns the "prefix", a path to the current working directory | |
989 | * relative to the work tree root, or NULL, if the current working | |
990 | * directory is not a strict subdirectory of the work tree root. The | |
991 | * prefix always ends with a '/' character. | |
992 | */ | |
5e7bfe25 JH |
993 | const char *setup_git_directory(void) |
994 | { | |
b3f66fd3 | 995 | return setup_git_directory_gently(NULL); |
5e7bfe25 | 996 | } |
abc06822 FG |
997 | |
998 | const char *resolve_gitdir(const char *suspect) | |
999 | { | |
1000 | if (is_git_directory(suspect)) | |
1001 | return suspect; | |
efc5fb6a | 1002 | return read_gitfile(suspect); |
abc06822 | 1003 | } |
1d999ddd TR |
1004 | |
1005 | /* if any standard file descriptor is missing open it to /dev/null */ | |
1006 | void sanitize_stdfds(void) | |
1007 | { | |
1008 | int fd = open("/dev/null", O_RDWR, 0); | |
1009 | while (fd != -1 && fd < 2) | |
1010 | fd = dup(fd); | |
1011 | if (fd == -1) | |
1012 | die_errno("open /dev/null or dup failed"); | |
1013 | if (fd > 2) | |
1014 | close(fd); | |
1015 | } | |
de0957ce NTND |
1016 | |
1017 | int daemonize(void) | |
1018 | { | |
1019 | #ifdef NO_POSIX_GOODIES | |
1020 | errno = ENOSYS; | |
1021 | return -1; | |
1022 | #else | |
1023 | switch (fork()) { | |
1024 | case 0: | |
1025 | break; | |
1026 | case -1: | |
1027 | die_errno("fork failed"); | |
1028 | default: | |
1029 | exit(0); | |
1030 | } | |
1031 | if (setsid() == -1) | |
1032 | die_errno("setsid failed"); | |
1033 | close(0); | |
1034 | close(1); | |
1035 | close(2); | |
1036 | sanitize_stdfds(); | |
1037 | return 0; | |
1038 | #endif | |
1039 | } |