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1 | #include "cache.h" | |
2 | #include "dir.h" | |
3 | #include "string-list.h" | |
4 | ||
5 | static int inside_git_dir = -1; | |
6 | static int inside_work_tree = -1; | |
7 | static int work_tree_config_is_bogus; | |
8 | ||
9 | static struct startup_info the_startup_info; | |
10 | struct startup_info *startup_info = &the_startup_info; | |
11 | ||
12 | /* | |
13 | * The input parameter must contain an absolute path, and it must already be | |
14 | * normalized. | |
15 | * | |
16 | * Find the part of an absolute path that lies inside the work tree by | |
17 | * dereferencing symlinks outside the work tree, for example: | |
18 | * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file | |
19 | * /dir/file (work tree is /) -> dir/file | |
20 | * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2 | |
21 | * /dir/repolink/file (repolink points to /dir/repo) -> file | |
22 | * /dir/repo (exactly equal to work tree) -> (empty string) | |
23 | */ | |
24 | static int abspath_part_inside_repo(char *path) | |
25 | { | |
26 | size_t len; | |
27 | size_t wtlen; | |
28 | char *path0; | |
29 | int off; | |
30 | const char *work_tree = get_git_work_tree(); | |
31 | ||
32 | if (!work_tree) | |
33 | return -1; | |
34 | wtlen = strlen(work_tree); | |
35 | len = strlen(path); | |
36 | off = offset_1st_component(path); | |
37 | ||
38 | /* check if work tree is already the prefix */ | |
39 | if (wtlen <= len && !strncmp(path, work_tree, wtlen)) { | |
40 | if (path[wtlen] == '/') { | |
41 | memmove(path, path + wtlen + 1, len - wtlen); | |
42 | return 0; | |
43 | } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') { | |
44 | /* work tree is the root, or the whole path */ | |
45 | memmove(path, path + wtlen, len - wtlen + 1); | |
46 | return 0; | |
47 | } | |
48 | /* work tree might match beginning of a symlink to work tree */ | |
49 | off = wtlen; | |
50 | } | |
51 | path0 = path; | |
52 | path += off; | |
53 | ||
54 | /* check each '/'-terminated level */ | |
55 | while (*path) { | |
56 | path++; | |
57 | if (*path == '/') { | |
58 | *path = '\0'; | |
59 | if (strcmp(real_path(path0), work_tree) == 0) { | |
60 | memmove(path0, path + 1, len - (path - path0)); | |
61 | return 0; | |
62 | } | |
63 | *path = '/'; | |
64 | } | |
65 | } | |
66 | ||
67 | /* check whole path */ | |
68 | if (strcmp(real_path(path0), work_tree) == 0) { | |
69 | *path0 = '\0'; | |
70 | return 0; | |
71 | } | |
72 | ||
73 | return -1; | |
74 | } | |
75 | ||
76 | /* | |
77 | * Normalize "path", prepending the "prefix" for relative paths. If | |
78 | * remaining_prefix is not NULL, return the actual prefix still | |
79 | * remains in the path. For example, prefix = sub1/sub2/ and path is | |
80 | * | |
81 | * foo -> sub1/sub2/foo (full prefix) | |
82 | * ../foo -> sub1/foo (remaining prefix is sub1/) | |
83 | * ../../bar -> bar (no remaining prefix) | |
84 | * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix) | |
85 | * `pwd`/../bar -> sub1/bar (no remaining prefix) | |
86 | */ | |
87 | char *prefix_path_gently(const char *prefix, int len, | |
88 | int *remaining_prefix, const char *path) | |
89 | { | |
90 | const char *orig = path; | |
91 | char *sanitized; | |
92 | if (is_absolute_path(orig)) { | |
93 | sanitized = xmallocz(strlen(path)); | |
94 | if (remaining_prefix) | |
95 | *remaining_prefix = 0; | |
96 | if (normalize_path_copy_len(sanitized, path, remaining_prefix)) { | |
97 | free(sanitized); | |
98 | return NULL; | |
99 | } | |
100 | if (abspath_part_inside_repo(sanitized)) { | |
101 | free(sanitized); | |
102 | return NULL; | |
103 | } | |
104 | } else { | |
105 | sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", path); | |
106 | if (remaining_prefix) | |
107 | *remaining_prefix = len; | |
108 | if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) { | |
109 | free(sanitized); | |
110 | return NULL; | |
111 | } | |
112 | } | |
113 | return sanitized; | |
114 | } | |
115 | ||
116 | char *prefix_path(const char *prefix, int len, const char *path) | |
117 | { | |
118 | char *r = prefix_path_gently(prefix, len, NULL, path); | |
119 | if (!r) | |
120 | die("'%s' is outside repository", path); | |
121 | return r; | |
122 | } | |
123 | ||
124 | int path_inside_repo(const char *prefix, const char *path) | |
125 | { | |
126 | int len = prefix ? strlen(prefix) : 0; | |
127 | char *r = prefix_path_gently(prefix, len, NULL, path); | |
128 | if (r) { | |
129 | free(r); | |
130 | return 1; | |
131 | } | |
132 | return 0; | |
133 | } | |
134 | ||
135 | int check_filename(const char *prefix, const char *arg) | |
136 | { | |
137 | const char *name; | |
138 | char *to_free = NULL; | |
139 | struct stat st; | |
140 | ||
141 | if (starts_with(arg, ":/")) { | |
142 | if (arg[2] == '\0') /* ":/" is root dir, always exists */ | |
143 | return 1; | |
144 | name = arg + 2; | |
145 | } else if (prefix) | |
146 | name = to_free = prefix_filename(prefix, arg); | |
147 | else | |
148 | name = arg; | |
149 | if (!lstat(name, &st)) { | |
150 | free(to_free); | |
151 | return 1; /* file exists */ | |
152 | } | |
153 | if (errno == ENOENT || errno == ENOTDIR) { | |
154 | free(to_free); | |
155 | return 0; /* file does not exist */ | |
156 | } | |
157 | die_errno("failed to stat '%s'", arg); | |
158 | } | |
159 | ||
160 | static void NORETURN die_verify_filename(const char *prefix, | |
161 | const char *arg, | |
162 | int diagnose_misspelt_rev) | |
163 | { | |
164 | if (!diagnose_misspelt_rev) | |
165 | die(_("%s: no such path in the working tree.\n" | |
166 | "Use 'git <command> -- <path>...' to specify paths that do not exist locally."), | |
167 | arg); | |
168 | /* | |
169 | * Saying "'(icase)foo' does not exist in the index" when the | |
170 | * user gave us ":(icase)foo" is just stupid. A magic pathspec | |
171 | * begins with a colon and is followed by a non-alnum; do not | |
172 | * let maybe_die_on_misspelt_object_name() even trigger. | |
173 | */ | |
174 | if (!(arg[0] == ':' && !isalnum(arg[1]))) | |
175 | maybe_die_on_misspelt_object_name(arg, prefix); | |
176 | ||
177 | /* ... or fall back the most general message. */ | |
178 | die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n" | |
179 | "Use '--' to separate paths from revisions, like this:\n" | |
180 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
181 | ||
182 | } | |
183 | ||
184 | /* | |
185 | * Verify a filename that we got as an argument for a pathspec | |
186 | * entry. Note that a filename that begins with "-" never verifies | |
187 | * as true, because even if such a filename were to exist, we want | |
188 | * it to be preceded by the "--" marker (or we want the user to | |
189 | * use a format like "./-filename") | |
190 | * | |
191 | * The "diagnose_misspelt_rev" is used to provide a user-friendly | |
192 | * diagnosis when dying upon finding that "name" is not a pathname. | |
193 | * If set to 1, the diagnosis will try to diagnose "name" as an | |
194 | * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis | |
195 | * will only complain about an inexisting file. | |
196 | * | |
197 | * This function is typically called to check that a "file or rev" | |
198 | * argument is unambiguous. In this case, the caller will want | |
199 | * diagnose_misspelt_rev == 1 when verifying the first non-rev | |
200 | * argument (which could have been a revision), and | |
201 | * diagnose_misspelt_rev == 0 for the next ones (because we already | |
202 | * saw a filename, there's not ambiguity anymore). | |
203 | */ | |
204 | void verify_filename(const char *prefix, | |
205 | const char *arg, | |
206 | int diagnose_misspelt_rev) | |
207 | { | |
208 | if (*arg == '-') | |
209 | die("bad flag '%s' used after filename", arg); | |
210 | if (check_filename(prefix, arg) || !no_wildcard(arg)) | |
211 | return; | |
212 | die_verify_filename(prefix, arg, diagnose_misspelt_rev); | |
213 | } | |
214 | ||
215 | /* | |
216 | * Opposite of the above: the command line did not have -- marker | |
217 | * and we parsed the arg as a refname. It should not be interpretable | |
218 | * as a filename. | |
219 | */ | |
220 | void verify_non_filename(const char *prefix, const char *arg) | |
221 | { | |
222 | if (!is_inside_work_tree() || is_inside_git_dir()) | |
223 | return; | |
224 | if (*arg == '-') | |
225 | return; /* flag */ | |
226 | if (!check_filename(prefix, arg)) | |
227 | return; | |
228 | die(_("ambiguous argument '%s': both revision and filename\n" | |
229 | "Use '--' to separate paths from revisions, like this:\n" | |
230 | "'git <command> [<revision>...] -- [<file>...]'"), arg); | |
231 | } | |
232 | ||
233 | int get_common_dir(struct strbuf *sb, const char *gitdir) | |
234 | { | |
235 | const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT); | |
236 | if (git_env_common_dir) { | |
237 | strbuf_addstr(sb, git_env_common_dir); | |
238 | return 1; | |
239 | } else { | |
240 | return get_common_dir_noenv(sb, gitdir); | |
241 | } | |
242 | } | |
243 | ||
244 | int get_common_dir_noenv(struct strbuf *sb, const char *gitdir) | |
245 | { | |
246 | struct strbuf data = STRBUF_INIT; | |
247 | struct strbuf path = STRBUF_INIT; | |
248 | int ret = 0; | |
249 | ||
250 | strbuf_addf(&path, "%s/commondir", gitdir); | |
251 | if (file_exists(path.buf)) { | |
252 | if (strbuf_read_file(&data, path.buf, 0) <= 0) | |
253 | die_errno(_("failed to read %s"), path.buf); | |
254 | while (data.len && (data.buf[data.len - 1] == '\n' || | |
255 | data.buf[data.len - 1] == '\r')) | |
256 | data.len--; | |
257 | data.buf[data.len] = '\0'; | |
258 | strbuf_reset(&path); | |
259 | if (!is_absolute_path(data.buf)) | |
260 | strbuf_addf(&path, "%s/", gitdir); | |
261 | strbuf_addbuf(&path, &data); | |
262 | strbuf_add_real_path(sb, path.buf); | |
263 | ret = 1; | |
264 | } else { | |
265 | strbuf_addstr(sb, gitdir); | |
266 | } | |
267 | ||
268 | strbuf_release(&data); | |
269 | strbuf_release(&path); | |
270 | return ret; | |
271 | } | |
272 | ||
273 | /* | |
274 | * Test if it looks like we're at a git directory. | |
275 | * We want to see: | |
276 | * | |
277 | * - either an objects/ directory _or_ the proper | |
278 | * GIT_OBJECT_DIRECTORY environment variable | |
279 | * - a refs/ directory | |
280 | * - either a HEAD symlink or a HEAD file that is formatted as | |
281 | * a proper "ref:", or a regular file HEAD that has a properly | |
282 | * formatted sha1 object name. | |
283 | */ | |
284 | int is_git_directory(const char *suspect) | |
285 | { | |
286 | struct strbuf path = STRBUF_INIT; | |
287 | int ret = 0; | |
288 | size_t len; | |
289 | ||
290 | /* Check worktree-related signatures */ | |
291 | strbuf_addf(&path, "%s/HEAD", suspect); | |
292 | if (validate_headref(path.buf)) | |
293 | goto done; | |
294 | ||
295 | strbuf_reset(&path); | |
296 | get_common_dir(&path, suspect); | |
297 | len = path.len; | |
298 | ||
299 | /* Check non-worktree-related signatures */ | |
300 | if (getenv(DB_ENVIRONMENT)) { | |
301 | if (access(getenv(DB_ENVIRONMENT), X_OK)) | |
302 | goto done; | |
303 | } | |
304 | else { | |
305 | strbuf_setlen(&path, len); | |
306 | strbuf_addstr(&path, "/objects"); | |
307 | if (access(path.buf, X_OK)) | |
308 | goto done; | |
309 | } | |
310 | ||
311 | strbuf_setlen(&path, len); | |
312 | strbuf_addstr(&path, "/refs"); | |
313 | if (access(path.buf, X_OK)) | |
314 | goto done; | |
315 | ||
316 | ret = 1; | |
317 | done: | |
318 | strbuf_release(&path); | |
319 | return ret; | |
320 | } | |
321 | ||
322 | int is_nonbare_repository_dir(struct strbuf *path) | |
323 | { | |
324 | int ret = 0; | |
325 | int gitfile_error; | |
326 | size_t orig_path_len = path->len; | |
327 | assert(orig_path_len != 0); | |
328 | strbuf_complete(path, '/'); | |
329 | strbuf_addstr(path, ".git"); | |
330 | if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf)) | |
331 | ret = 1; | |
332 | if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED || | |
333 | gitfile_error == READ_GITFILE_ERR_READ_FAILED) | |
334 | ret = 1; | |
335 | strbuf_setlen(path, orig_path_len); | |
336 | return ret; | |
337 | } | |
338 | ||
339 | int 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 | } | |
345 | ||
346 | int 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 | } | |
352 | ||
353 | void setup_work_tree(void) | |
354 | { | |
355 | const char *work_tree, *git_dir; | |
356 | static int initialized = 0; | |
357 | ||
358 | if (initialized) | |
359 | return; | |
360 | ||
361 | if (work_tree_config_is_bogus) | |
362 | die("unable to set up work tree using invalid config"); | |
363 | ||
364 | work_tree = get_git_work_tree(); | |
365 | git_dir = get_git_dir(); | |
366 | if (!is_absolute_path(git_dir)) | |
367 | git_dir = real_path(get_git_dir()); | |
368 | if (!work_tree || chdir(work_tree)) | |
369 | die("This operation must be run in a work tree"); | |
370 | ||
371 | /* | |
372 | * Make sure subsequent git processes find correct worktree | |
373 | * if $GIT_WORK_TREE is set relative | |
374 | */ | |
375 | if (getenv(GIT_WORK_TREE_ENVIRONMENT)) | |
376 | setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1); | |
377 | ||
378 | set_git_dir(remove_leading_path(git_dir, work_tree)); | |
379 | initialized = 1; | |
380 | } | |
381 | ||
382 | static int check_repo_format(const char *var, const char *value, void *vdata) | |
383 | { | |
384 | struct repository_format *data = vdata; | |
385 | const char *ext; | |
386 | ||
387 | if (strcmp(var, "core.repositoryformatversion") == 0) | |
388 | data->version = git_config_int(var, value); | |
389 | else if (skip_prefix(var, "extensions.", &ext)) { | |
390 | /* | |
391 | * record any known extensions here; otherwise, | |
392 | * we fall through to recording it as unknown, and | |
393 | * check_repository_format will complain | |
394 | */ | |
395 | if (!strcmp(ext, "noop")) | |
396 | ; | |
397 | else if (!strcmp(ext, "preciousobjects")) | |
398 | data->precious_objects = git_config_bool(var, value); | |
399 | else | |
400 | string_list_append(&data->unknown_extensions, ext); | |
401 | } else if (strcmp(var, "core.bare") == 0) { | |
402 | data->is_bare = git_config_bool(var, value); | |
403 | } else if (strcmp(var, "core.worktree") == 0) { | |
404 | if (!value) | |
405 | return config_error_nonbool(var); | |
406 | data->work_tree = xstrdup(value); | |
407 | } | |
408 | return 0; | |
409 | } | |
410 | ||
411 | static int check_repository_format_gently(const char *gitdir, int *nongit_ok) | |
412 | { | |
413 | struct strbuf sb = STRBUF_INIT; | |
414 | struct strbuf err = STRBUF_INIT; | |
415 | struct repository_format candidate; | |
416 | int has_common; | |
417 | ||
418 | has_common = get_common_dir(&sb, gitdir); | |
419 | strbuf_addstr(&sb, "/config"); | |
420 | read_repository_format(&candidate, sb.buf); | |
421 | strbuf_release(&sb); | |
422 | ||
423 | /* | |
424 | * For historical use of check_repository_format() in git-init, | |
425 | * we treat a missing config as a silent "ok", even when nongit_ok | |
426 | * is unset. | |
427 | */ | |
428 | if (candidate.version < 0) | |
429 | return 0; | |
430 | ||
431 | if (verify_repository_format(&candidate, &err) < 0) { | |
432 | if (nongit_ok) { | |
433 | warning("%s", err.buf); | |
434 | strbuf_release(&err); | |
435 | *nongit_ok = -1; | |
436 | return -1; | |
437 | } | |
438 | die("%s", err.buf); | |
439 | } | |
440 | ||
441 | repository_format_precious_objects = candidate.precious_objects; | |
442 | string_list_clear(&candidate.unknown_extensions, 0); | |
443 | if (!has_common) { | |
444 | if (candidate.is_bare != -1) { | |
445 | is_bare_repository_cfg = candidate.is_bare; | |
446 | if (is_bare_repository_cfg == 1) | |
447 | inside_work_tree = -1; | |
448 | } | |
449 | if (candidate.work_tree) { | |
450 | free(git_work_tree_cfg); | |
451 | git_work_tree_cfg = candidate.work_tree; | |
452 | inside_work_tree = -1; | |
453 | } | |
454 | } else { | |
455 | free(candidate.work_tree); | |
456 | } | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | int read_repository_format(struct repository_format *format, const char *path) | |
462 | { | |
463 | memset(format, 0, sizeof(*format)); | |
464 | format->version = -1; | |
465 | format->is_bare = -1; | |
466 | string_list_init(&format->unknown_extensions, 1); | |
467 | git_config_from_file(check_repo_format, path, format); | |
468 | return format->version; | |
469 | } | |
470 | ||
471 | int verify_repository_format(const struct repository_format *format, | |
472 | struct strbuf *err) | |
473 | { | |
474 | if (GIT_REPO_VERSION_READ < format->version) { | |
475 | strbuf_addf(err, _("Expected git repo version <= %d, found %d"), | |
476 | GIT_REPO_VERSION_READ, format->version); | |
477 | return -1; | |
478 | } | |
479 | ||
480 | if (format->version >= 1 && format->unknown_extensions.nr) { | |
481 | int i; | |
482 | ||
483 | strbuf_addstr(err, _("unknown repository extensions found:")); | |
484 | ||
485 | for (i = 0; i < format->unknown_extensions.nr; i++) | |
486 | strbuf_addf(err, "\n\t%s", | |
487 | format->unknown_extensions.items[i].string); | |
488 | return -1; | |
489 | } | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | void read_gitfile_error_die(int error_code, const char *path, const char *dir) | |
495 | { | |
496 | switch (error_code) { | |
497 | case READ_GITFILE_ERR_STAT_FAILED: | |
498 | case READ_GITFILE_ERR_NOT_A_FILE: | |
499 | /* non-fatal; follow return path */ | |
500 | break; | |
501 | case READ_GITFILE_ERR_OPEN_FAILED: | |
502 | die_errno("Error opening '%s'", path); | |
503 | case READ_GITFILE_ERR_TOO_LARGE: | |
504 | die("Too large to be a .git file: '%s'", path); | |
505 | case READ_GITFILE_ERR_READ_FAILED: | |
506 | die("Error reading %s", path); | |
507 | case READ_GITFILE_ERR_INVALID_FORMAT: | |
508 | die("Invalid gitfile format: %s", path); | |
509 | case READ_GITFILE_ERR_NO_PATH: | |
510 | die("No path in gitfile: %s", path); | |
511 | case READ_GITFILE_ERR_NOT_A_REPO: | |
512 | die("Not a git repository: %s", dir); | |
513 | default: | |
514 | die("BUG: unknown error code"); | |
515 | } | |
516 | } | |
517 | ||
518 | /* | |
519 | * Try to read the location of the git directory from the .git file, | |
520 | * return path to git directory if found. | |
521 | * | |
522 | * On failure, if return_error_code is not NULL, return_error_code | |
523 | * will be set to an error code and NULL will be returned. If | |
524 | * return_error_code is NULL the function will die instead (for most | |
525 | * cases). | |
526 | */ | |
527 | const char *read_gitfile_gently(const char *path, int *return_error_code) | |
528 | { | |
529 | const int max_file_size = 1 << 20; /* 1MB */ | |
530 | int error_code = 0; | |
531 | char *buf = NULL; | |
532 | char *dir = NULL; | |
533 | const char *slash; | |
534 | struct stat st; | |
535 | int fd; | |
536 | ssize_t len; | |
537 | ||
538 | if (stat(path, &st)) { | |
539 | /* NEEDSWORK: discern between ENOENT vs other errors */ | |
540 | error_code = READ_GITFILE_ERR_STAT_FAILED; | |
541 | goto cleanup_return; | |
542 | } | |
543 | if (!S_ISREG(st.st_mode)) { | |
544 | error_code = READ_GITFILE_ERR_NOT_A_FILE; | |
545 | goto cleanup_return; | |
546 | } | |
547 | if (st.st_size > max_file_size) { | |
548 | error_code = READ_GITFILE_ERR_TOO_LARGE; | |
549 | goto cleanup_return; | |
550 | } | |
551 | fd = open(path, O_RDONLY); | |
552 | if (fd < 0) { | |
553 | error_code = READ_GITFILE_ERR_OPEN_FAILED; | |
554 | goto cleanup_return; | |
555 | } | |
556 | buf = xmallocz(st.st_size); | |
557 | len = read_in_full(fd, buf, st.st_size); | |
558 | close(fd); | |
559 | if (len != st.st_size) { | |
560 | error_code = READ_GITFILE_ERR_READ_FAILED; | |
561 | goto cleanup_return; | |
562 | } | |
563 | if (!starts_with(buf, "gitdir: ")) { | |
564 | error_code = READ_GITFILE_ERR_INVALID_FORMAT; | |
565 | goto cleanup_return; | |
566 | } | |
567 | while (buf[len - 1] == '\n' || buf[len - 1] == '\r') | |
568 | len--; | |
569 | if (len < 9) { | |
570 | error_code = READ_GITFILE_ERR_NO_PATH; | |
571 | goto cleanup_return; | |
572 | } | |
573 | buf[len] = '\0'; | |
574 | dir = buf + 8; | |
575 | ||
576 | if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) { | |
577 | size_t pathlen = slash+1 - path; | |
578 | dir = xstrfmt("%.*s%.*s", (int)pathlen, path, | |
579 | (int)(len - 8), buf + 8); | |
580 | free(buf); | |
581 | buf = dir; | |
582 | } | |
583 | if (!is_git_directory(dir)) { | |
584 | error_code = READ_GITFILE_ERR_NOT_A_REPO; | |
585 | goto cleanup_return; | |
586 | } | |
587 | path = real_path(dir); | |
588 | ||
589 | cleanup_return: | |
590 | if (return_error_code) | |
591 | *return_error_code = error_code; | |
592 | else if (error_code) | |
593 | read_gitfile_error_die(error_code, path, dir); | |
594 | ||
595 | free(buf); | |
596 | return error_code ? NULL : path; | |
597 | } | |
598 | ||
599 | static const char *setup_explicit_git_dir(const char *gitdirenv, | |
600 | struct strbuf *cwd, | |
601 | int *nongit_ok) | |
602 | { | |
603 | const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); | |
604 | const char *worktree; | |
605 | char *gitfile; | |
606 | int offset; | |
607 | ||
608 | if (PATH_MAX - 40 < strlen(gitdirenv)) | |
609 | die("'$%s' too big", GIT_DIR_ENVIRONMENT); | |
610 | ||
611 | gitfile = (char*)read_gitfile(gitdirenv); | |
612 | if (gitfile) { | |
613 | gitfile = xstrdup(gitfile); | |
614 | gitdirenv = gitfile; | |
615 | } | |
616 | ||
617 | if (!is_git_directory(gitdirenv)) { | |
618 | if (nongit_ok) { | |
619 | *nongit_ok = 1; | |
620 | free(gitfile); | |
621 | return NULL; | |
622 | } | |
623 | die("Not a git repository: '%s'", gitdirenv); | |
624 | } | |
625 | ||
626 | if (check_repository_format_gently(gitdirenv, nongit_ok)) { | |
627 | free(gitfile); | |
628 | return NULL; | |
629 | } | |
630 | ||
631 | /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */ | |
632 | if (work_tree_env) | |
633 | set_git_work_tree(work_tree_env); | |
634 | else if (is_bare_repository_cfg > 0) { | |
635 | if (git_work_tree_cfg) { | |
636 | /* #22.2, #30 */ | |
637 | warning("core.bare and core.worktree do not make sense"); | |
638 | work_tree_config_is_bogus = 1; | |
639 | } | |
640 | ||
641 | /* #18, #26 */ | |
642 | set_git_dir(gitdirenv); | |
643 | free(gitfile); | |
644 | return NULL; | |
645 | } | |
646 | else if (git_work_tree_cfg) { /* #6, #14 */ | |
647 | if (is_absolute_path(git_work_tree_cfg)) | |
648 | set_git_work_tree(git_work_tree_cfg); | |
649 | else { | |
650 | char *core_worktree; | |
651 | if (chdir(gitdirenv)) | |
652 | die_errno("Could not chdir to '%s'", gitdirenv); | |
653 | if (chdir(git_work_tree_cfg)) | |
654 | die_errno("Could not chdir to '%s'", git_work_tree_cfg); | |
655 | core_worktree = xgetcwd(); | |
656 | if (chdir(cwd->buf)) | |
657 | die_errno("Could not come back to cwd"); | |
658 | set_git_work_tree(core_worktree); | |
659 | free(core_worktree); | |
660 | } | |
661 | } | |
662 | else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) { | |
663 | /* #16d */ | |
664 | set_git_dir(gitdirenv); | |
665 | free(gitfile); | |
666 | return NULL; | |
667 | } | |
668 | else /* #2, #10 */ | |
669 | set_git_work_tree("."); | |
670 | ||
671 | /* set_git_work_tree() must have been called by now */ | |
672 | worktree = get_git_work_tree(); | |
673 | ||
674 | /* both get_git_work_tree() and cwd are already normalized */ | |
675 | if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */ | |
676 | set_git_dir(gitdirenv); | |
677 | free(gitfile); | |
678 | return NULL; | |
679 | } | |
680 | ||
681 | offset = dir_inside_of(cwd->buf, worktree); | |
682 | if (offset >= 0) { /* cwd inside worktree? */ | |
683 | set_git_dir(real_path(gitdirenv)); | |
684 | if (chdir(worktree)) | |
685 | die_errno("Could not chdir to '%s'", worktree); | |
686 | strbuf_addch(cwd, '/'); | |
687 | free(gitfile); | |
688 | return cwd->buf + offset; | |
689 | } | |
690 | ||
691 | /* cwd outside worktree */ | |
692 | set_git_dir(gitdirenv); | |
693 | free(gitfile); | |
694 | return NULL; | |
695 | } | |
696 | ||
697 | static const char *setup_discovered_git_dir(const char *gitdir, | |
698 | struct strbuf *cwd, int offset, | |
699 | int *nongit_ok) | |
700 | { | |
701 | if (check_repository_format_gently(gitdir, nongit_ok)) | |
702 | return NULL; | |
703 | ||
704 | /* --work-tree is set without --git-dir; use discovered one */ | |
705 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
706 | if (offset != cwd->len && !is_absolute_path(gitdir)) | |
707 | gitdir = real_pathdup(gitdir, 1); | |
708 | if (chdir(cwd->buf)) | |
709 | die_errno("Could not come back to cwd"); | |
710 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); | |
711 | } | |
712 | ||
713 | /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */ | |
714 | if (is_bare_repository_cfg > 0) { | |
715 | set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir)); | |
716 | if (chdir(cwd->buf)) | |
717 | die_errno("Could not come back to cwd"); | |
718 | return NULL; | |
719 | } | |
720 | ||
721 | /* #0, #1, #5, #8, #9, #12, #13 */ | |
722 | set_git_work_tree("."); | |
723 | if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT)) | |
724 | set_git_dir(gitdir); | |
725 | inside_git_dir = 0; | |
726 | inside_work_tree = 1; | |
727 | if (offset == cwd->len) | |
728 | return NULL; | |
729 | ||
730 | /* Make "offset" point past the '/' (already the case for root dirs) */ | |
731 | if (offset != offset_1st_component(cwd->buf)) | |
732 | offset++; | |
733 | /* Add a '/' at the end */ | |
734 | strbuf_addch(cwd, '/'); | |
735 | return cwd->buf + offset; | |
736 | } | |
737 | ||
738 | /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */ | |
739 | static const char *setup_bare_git_dir(struct strbuf *cwd, int offset, | |
740 | int *nongit_ok) | |
741 | { | |
742 | int root_len; | |
743 | ||
744 | if (check_repository_format_gently(".", nongit_ok)) | |
745 | return NULL; | |
746 | ||
747 | setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1); | |
748 | ||
749 | /* --work-tree is set without --git-dir; use discovered one */ | |
750 | if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) { | |
751 | static const char *gitdir; | |
752 | ||
753 | gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset); | |
754 | if (chdir(cwd->buf)) | |
755 | die_errno("Could not come back to cwd"); | |
756 | return setup_explicit_git_dir(gitdir, cwd, nongit_ok); | |
757 | } | |
758 | ||
759 | inside_git_dir = 1; | |
760 | inside_work_tree = 0; | |
761 | if (offset != cwd->len) { | |
762 | if (chdir(cwd->buf)) | |
763 | die_errno("Cannot come back to cwd"); | |
764 | root_len = offset_1st_component(cwd->buf); | |
765 | strbuf_setlen(cwd, offset > root_len ? offset : root_len); | |
766 | set_git_dir(cwd->buf); | |
767 | } | |
768 | else | |
769 | set_git_dir("."); | |
770 | return NULL; | |
771 | } | |
772 | ||
773 | static const char *setup_nongit(const char *cwd, int *nongit_ok) | |
774 | { | |
775 | if (!nongit_ok) | |
776 | die(_("Not a git repository (or any of the parent directories): %s"), DEFAULT_GIT_DIR_ENVIRONMENT); | |
777 | if (chdir(cwd)) | |
778 | die_errno(_("Cannot come back to cwd")); | |
779 | *nongit_ok = 1; | |
780 | return NULL; | |
781 | } | |
782 | ||
783 | static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len) | |
784 | { | |
785 | struct stat buf; | |
786 | if (stat(path, &buf)) { | |
787 | die_errno("failed to stat '%*s%s%s'", | |
788 | prefix_len, | |
789 | prefix ? prefix : "", | |
790 | prefix ? "/" : "", path); | |
791 | } | |
792 | return buf.st_dev; | |
793 | } | |
794 | ||
795 | /* | |
796 | * A "string_list_each_func_t" function that canonicalizes an entry | |
797 | * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or | |
798 | * discards it if unusable. The presence of an empty entry in | |
799 | * GIT_CEILING_DIRECTORIES turns off canonicalization for all | |
800 | * subsequent entries. | |
801 | */ | |
802 | static int canonicalize_ceiling_entry(struct string_list_item *item, | |
803 | void *cb_data) | |
804 | { | |
805 | int *empty_entry_found = cb_data; | |
806 | char *ceil = item->string; | |
807 | ||
808 | if (!*ceil) { | |
809 | *empty_entry_found = 1; | |
810 | return 0; | |
811 | } else if (!is_absolute_path(ceil)) { | |
812 | return 0; | |
813 | } else if (*empty_entry_found) { | |
814 | /* Keep entry but do not canonicalize it */ | |
815 | return 1; | |
816 | } else { | |
817 | char *real_path = real_pathdup(ceil, 0); | |
818 | if (!real_path) { | |
819 | return 0; | |
820 | } | |
821 | free(item->string); | |
822 | item->string = real_path; | |
823 | return 1; | |
824 | } | |
825 | } | |
826 | ||
827 | enum discovery_result { | |
828 | GIT_DIR_NONE = 0, | |
829 | GIT_DIR_EXPLICIT, | |
830 | GIT_DIR_DISCOVERED, | |
831 | GIT_DIR_BARE, | |
832 | /* these are errors */ | |
833 | GIT_DIR_HIT_CEILING = -1, | |
834 | GIT_DIR_HIT_MOUNT_POINT = -2, | |
835 | GIT_DIR_INVALID_GITFILE = -3 | |
836 | }; | |
837 | ||
838 | /* | |
839 | * We cannot decide in this function whether we are in the work tree or | |
840 | * not, since the config can only be read _after_ this function was called. | |
841 | * | |
842 | * Also, we avoid changing any global state (such as the current working | |
843 | * directory) to allow early callers. | |
844 | * | |
845 | * The directory where the search should start needs to be passed in via the | |
846 | * `dir` parameter; upon return, the `dir` buffer will contain the path of | |
847 | * the directory where the search ended, and `gitdir` will contain the path of | |
848 | * the discovered .git/ directory, if any. If `gitdir` is not absolute, it | |
849 | * is relative to `dir` (i.e. *not* necessarily the cwd). | |
850 | */ | |
851 | static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir, | |
852 | struct strbuf *gitdir, | |
853 | int die_on_error) | |
854 | { | |
855 | const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT); | |
856 | struct string_list ceiling_dirs = STRING_LIST_INIT_DUP; | |
857 | const char *gitdirenv; | |
858 | int ceil_offset = -1, min_offset = has_dos_drive_prefix(dir->buf) ? 3 : 1; | |
859 | dev_t current_device = 0; | |
860 | int one_filesystem = 1; | |
861 | ||
862 | /* | |
863 | * If GIT_DIR is set explicitly, we're not going | |
864 | * to do any discovery, but we still do repository | |
865 | * validation. | |
866 | */ | |
867 | gitdirenv = getenv(GIT_DIR_ENVIRONMENT); | |
868 | if (gitdirenv) { | |
869 | strbuf_addstr(gitdir, gitdirenv); | |
870 | return GIT_DIR_EXPLICIT; | |
871 | } | |
872 | ||
873 | if (env_ceiling_dirs) { | |
874 | int empty_entry_found = 0; | |
875 | ||
876 | string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1); | |
877 | filter_string_list(&ceiling_dirs, 0, | |
878 | canonicalize_ceiling_entry, &empty_entry_found); | |
879 | ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs); | |
880 | string_list_clear(&ceiling_dirs, 0); | |
881 | } | |
882 | ||
883 | if (ceil_offset < 0) | |
884 | ceil_offset = min_offset - 2; | |
885 | ||
886 | /* | |
887 | * Test in the following order (relative to the dir): | |
888 | * - .git (file containing "gitdir: <path>") | |
889 | * - .git/ | |
890 | * - ./ (bare) | |
891 | * - ../.git | |
892 | * - ../.git/ | |
893 | * - ../ (bare) | |
894 | * - ../../.git/ | |
895 | * etc. | |
896 | */ | |
897 | one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0); | |
898 | if (one_filesystem) | |
899 | current_device = get_device_or_die(dir->buf, NULL, 0); | |
900 | for (;;) { | |
901 | int offset = dir->len, error_code = 0; | |
902 | ||
903 | if (offset > min_offset) | |
904 | strbuf_addch(dir, '/'); | |
905 | strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT); | |
906 | gitdirenv = read_gitfile_gently(dir->buf, die_on_error ? | |
907 | NULL : &error_code); | |
908 | if (!gitdirenv) { | |
909 | if (die_on_error || | |
910 | error_code == READ_GITFILE_ERR_NOT_A_FILE) { | |
911 | /* NEEDSWORK: fail if .git is not file nor dir */ | |
912 | if (is_git_directory(dir->buf)) | |
913 | gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT; | |
914 | } else if (error_code != READ_GITFILE_ERR_STAT_FAILED) | |
915 | return GIT_DIR_INVALID_GITFILE; | |
916 | } | |
917 | strbuf_setlen(dir, offset); | |
918 | if (gitdirenv) { | |
919 | strbuf_addstr(gitdir, gitdirenv); | |
920 | return GIT_DIR_DISCOVERED; | |
921 | } | |
922 | ||
923 | if (is_git_directory(dir->buf)) { | |
924 | strbuf_addstr(gitdir, "."); | |
925 | return GIT_DIR_BARE; | |
926 | } | |
927 | ||
928 | if (offset <= min_offset) | |
929 | return GIT_DIR_HIT_CEILING; | |
930 | ||
931 | while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset])) | |
932 | ; /* continue */ | |
933 | if (offset <= ceil_offset) | |
934 | return GIT_DIR_HIT_CEILING; | |
935 | ||
936 | strbuf_setlen(dir, offset > min_offset ? offset : min_offset); | |
937 | if (one_filesystem && | |
938 | current_device != get_device_or_die(dir->buf, NULL, offset)) | |
939 | return GIT_DIR_HIT_MOUNT_POINT; | |
940 | } | |
941 | } | |
942 | ||
943 | const char *discover_git_directory(struct strbuf *gitdir) | |
944 | { | |
945 | struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT; | |
946 | size_t gitdir_offset = gitdir->len, cwd_len; | |
947 | struct repository_format candidate; | |
948 | ||
949 | if (strbuf_getcwd(&dir)) | |
950 | return NULL; | |
951 | ||
952 | cwd_len = dir.len; | |
953 | if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) { | |
954 | strbuf_release(&dir); | |
955 | return NULL; | |
956 | } | |
957 | ||
958 | /* | |
959 | * The returned gitdir is relative to dir, and if dir does not reflect | |
960 | * the current working directory, we simply make the gitdir absolute. | |
961 | */ | |
962 | if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) { | |
963 | /* Avoid a trailing "/." */ | |
964 | if (!strcmp(".", gitdir->buf + gitdir_offset)) | |
965 | strbuf_setlen(gitdir, gitdir_offset); | |
966 | else | |
967 | strbuf_addch(&dir, '/'); | |
968 | strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len); | |
969 | } | |
970 | ||
971 | strbuf_reset(&dir); | |
972 | strbuf_addf(&dir, "%s/config", gitdir->buf + gitdir_offset); | |
973 | read_repository_format(&candidate, dir.buf); | |
974 | strbuf_release(&dir); | |
975 | ||
976 | if (verify_repository_format(&candidate, &err) < 0) { | |
977 | warning("ignoring git dir '%s': %s", | |
978 | gitdir->buf + gitdir_offset, err.buf); | |
979 | strbuf_release(&err); | |
980 | return NULL; | |
981 | } | |
982 | ||
983 | return gitdir->buf + gitdir_offset; | |
984 | } | |
985 | ||
986 | const char *setup_git_directory_gently(int *nongit_ok) | |
987 | { | |
988 | static struct strbuf cwd = STRBUF_INIT; | |
989 | struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT; | |
990 | const char *prefix, *env_prefix; | |
991 | ||
992 | /* | |
993 | * We may have read an incomplete configuration before | |
994 | * setting-up the git directory. If so, clear the cache so | |
995 | * that the next queries to the configuration reload complete | |
996 | * configuration (including the per-repo config file that we | |
997 | * ignored previously). | |
998 | */ | |
999 | git_config_clear(); | |
1000 | ||
1001 | /* | |
1002 | * Let's assume that we are in a git repository. | |
1003 | * If it turns out later that we are somewhere else, the value will be | |
1004 | * updated accordingly. | |
1005 | */ | |
1006 | if (nongit_ok) | |
1007 | *nongit_ok = 0; | |
1008 | ||
1009 | if (strbuf_getcwd(&cwd)) | |
1010 | die_errno(_("Unable to read current working directory")); | |
1011 | strbuf_addbuf(&dir, &cwd); | |
1012 | ||
1013 | switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) { | |
1014 | case GIT_DIR_NONE: | |
1015 | prefix = NULL; | |
1016 | break; | |
1017 | case GIT_DIR_EXPLICIT: | |
1018 | prefix = setup_explicit_git_dir(gitdir.buf, &cwd, nongit_ok); | |
1019 | break; | |
1020 | case GIT_DIR_DISCOVERED: | |
1021 | if (dir.len < cwd.len && chdir(dir.buf)) | |
1022 | die(_("Cannot change to '%s'"), dir.buf); | |
1023 | prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len, | |
1024 | nongit_ok); | |
1025 | break; | |
1026 | case GIT_DIR_BARE: | |
1027 | if (dir.len < cwd.len && chdir(dir.buf)) | |
1028 | die(_("Cannot change to '%s'"), dir.buf); | |
1029 | prefix = setup_bare_git_dir(&cwd, dir.len, nongit_ok); | |
1030 | break; | |
1031 | case GIT_DIR_HIT_CEILING: | |
1032 | prefix = setup_nongit(cwd.buf, nongit_ok); | |
1033 | break; | |
1034 | case GIT_DIR_HIT_MOUNT_POINT: | |
1035 | if (nongit_ok) { | |
1036 | *nongit_ok = 1; | |
1037 | strbuf_release(&cwd); | |
1038 | strbuf_release(&dir); | |
1039 | return NULL; | |
1040 | } | |
1041 | die(_("Not a git repository (or any parent up to mount point %s)\n" | |
1042 | "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."), | |
1043 | dir.buf); | |
1044 | default: | |
1045 | die("BUG: unhandled setup_git_directory_1() result"); | |
1046 | } | |
1047 | ||
1048 | env_prefix = getenv(GIT_TOPLEVEL_PREFIX_ENVIRONMENT); | |
1049 | if (env_prefix) | |
1050 | prefix = env_prefix; | |
1051 | ||
1052 | if (prefix) | |
1053 | setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1); | |
1054 | else | |
1055 | setenv(GIT_PREFIX_ENVIRONMENT, "", 1); | |
1056 | ||
1057 | startup_info->have_repository = !nongit_ok || !*nongit_ok; | |
1058 | startup_info->prefix = prefix; | |
1059 | ||
1060 | strbuf_release(&dir); | |
1061 | strbuf_release(&gitdir); | |
1062 | ||
1063 | return prefix; | |
1064 | } | |
1065 | ||
1066 | int git_config_perm(const char *var, const char *value) | |
1067 | { | |
1068 | int i; | |
1069 | char *endptr; | |
1070 | ||
1071 | if (value == NULL) | |
1072 | return PERM_GROUP; | |
1073 | ||
1074 | if (!strcmp(value, "umask")) | |
1075 | return PERM_UMASK; | |
1076 | if (!strcmp(value, "group")) | |
1077 | return PERM_GROUP; | |
1078 | if (!strcmp(value, "all") || | |
1079 | !strcmp(value, "world") || | |
1080 | !strcmp(value, "everybody")) | |
1081 | return PERM_EVERYBODY; | |
1082 | ||
1083 | /* Parse octal numbers */ | |
1084 | i = strtol(value, &endptr, 8); | |
1085 | ||
1086 | /* If not an octal number, maybe true/false? */ | |
1087 | if (*endptr != 0) | |
1088 | return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK; | |
1089 | ||
1090 | /* | |
1091 | * Treat values 0, 1 and 2 as compatibility cases, otherwise it is | |
1092 | * a chmod value to restrict to. | |
1093 | */ | |
1094 | switch (i) { | |
1095 | case PERM_UMASK: /* 0 */ | |
1096 | return PERM_UMASK; | |
1097 | case OLD_PERM_GROUP: /* 1 */ | |
1098 | return PERM_GROUP; | |
1099 | case OLD_PERM_EVERYBODY: /* 2 */ | |
1100 | return PERM_EVERYBODY; | |
1101 | } | |
1102 | ||
1103 | /* A filemode value was given: 0xxx */ | |
1104 | ||
1105 | if ((i & 0600) != 0600) | |
1106 | die(_("Problem with core.sharedRepository filemode value " | |
1107 | "(0%.3o).\nThe owner of files must always have " | |
1108 | "read and write permissions."), i); | |
1109 | ||
1110 | /* | |
1111 | * Mask filemode value. Others can not get write permission. | |
1112 | * x flags for directories are handled separately. | |
1113 | */ | |
1114 | return -(i & 0666); | |
1115 | } | |
1116 | ||
1117 | void check_repository_format(void) | |
1118 | { | |
1119 | check_repository_format_gently(get_git_dir(), NULL); | |
1120 | startup_info->have_repository = 1; | |
1121 | } | |
1122 | ||
1123 | /* | |
1124 | * Returns the "prefix", a path to the current working directory | |
1125 | * relative to the work tree root, or NULL, if the current working | |
1126 | * directory is not a strict subdirectory of the work tree root. The | |
1127 | * prefix always ends with a '/' character. | |
1128 | */ | |
1129 | const char *setup_git_directory(void) | |
1130 | { | |
1131 | return setup_git_directory_gently(NULL); | |
1132 | } | |
1133 | ||
1134 | const char *resolve_gitdir_gently(const char *suspect, int *return_error_code) | |
1135 | { | |
1136 | if (is_git_directory(suspect)) | |
1137 | return suspect; | |
1138 | return read_gitfile_gently(suspect, return_error_code); | |
1139 | } | |
1140 | ||
1141 | /* if any standard file descriptor is missing open it to /dev/null */ | |
1142 | void sanitize_stdfds(void) | |
1143 | { | |
1144 | int fd = open("/dev/null", O_RDWR, 0); | |
1145 | while (fd != -1 && fd < 2) | |
1146 | fd = dup(fd); | |
1147 | if (fd == -1) | |
1148 | die_errno("open /dev/null or dup failed"); | |
1149 | if (fd > 2) | |
1150 | close(fd); | |
1151 | } | |
1152 | ||
1153 | int daemonize(void) | |
1154 | { | |
1155 | #ifdef NO_POSIX_GOODIES | |
1156 | errno = ENOSYS; | |
1157 | return -1; | |
1158 | #else | |
1159 | switch (fork()) { | |
1160 | case 0: | |
1161 | break; | |
1162 | case -1: | |
1163 | die_errno("fork failed"); | |
1164 | default: | |
1165 | exit(0); | |
1166 | } | |
1167 | if (setsid() == -1) | |
1168 | die_errno("setsid failed"); | |
1169 | close(0); | |
1170 | close(1); | |
1171 | close(2); | |
1172 | sanitize_stdfds(); | |
1173 | return 0; | |
1174 | #endif | |
1175 | } |