check_filename(): use skip_prefix
[git/git.git] / setup.c
CommitLineData
d288a700 1#include "cache.h"
e90fdc39 2#include "dir.h"
31171d9e 3#include "string-list.h"
e90fdc39
JS
4
5static int inside_git_dir = -1;
6static int inside_work_tree = -1;
fada7674 7static int work_tree_config_is_bogus;
d288a700 8
46c3cd44
JK
9static struct startup_info the_startup_info;
10struct startup_info *startup_info = &the_startup_info;
11
ddc2a628
MEW
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 */
24static 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);
6127ff63 36 off = offset_1st_component(path);
ddc2a628
MEW
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;
6127ff63 52 path += off;
ddc2a628
MEW
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
645a29c4
NTND
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 */
87char *prefix_path_gently(const char *prefix, int len,
88 int *remaining_prefix, const char *path)
d089ebaa
JH
89{
90 const char *orig = path;
18e051a3
CMAB
91 char *sanitized;
92 if (is_absolute_path(orig)) {
3733e694 93 sanitized = xmallocz(strlen(path));
645a29c4
NTND
94 if (remaining_prefix)
95 *remaining_prefix = 0;
655ee9ea
MEW
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 }
18e051a3 104 } else {
24041d6b 105 sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", path);
645a29c4
NTND
106 if (remaining_prefix)
107 *remaining_prefix = len;
655ee9ea 108 if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) {
546e0fd9
JK
109 free(sanitized);
110 return NULL;
d089ebaa 111 }
d089ebaa
JH
112 }
113 return sanitized;
f332726e
LT
114}
115
546e0fd9
JK
116char *prefix_path(const char *prefix, int len, const char *path)
117{
645a29c4 118 char *r = prefix_path_gently(prefix, len, NULL, path);
546e0fd9
JK
119 if (!r)
120 die("'%s' is outside repository", path);
121 return r;
122}
123
124int path_inside_repo(const char *prefix, const char *path)
125{
126 int len = prefix ? strlen(prefix) : 0;
645a29c4 127 char *r = prefix_path_gently(prefix, len, NULL, path);
546e0fd9
JK
128 if (r) {
129 free(r);
130 return 1;
131 }
132 return 0;
133}
134
c6e8c800
JH
135int check_filename(const char *prefix, const char *arg)
136{
e4da43b1 137 char *to_free = NULL;
c6e8c800
JH
138 struct stat st;
139
d51c6ee0
JK
140 if (skip_prefix(arg, ":/", &arg)) {
141 if (!*arg) /* ":/" is root dir, always exists */
4db86e8b 142 return 1;
a08cbcda
JK
143 prefix = NULL;
144 }
145
146 if (prefix)
147 arg = to_free = prefix_filename(prefix, arg);
148
149 if (!lstat(arg, &st)) {
e4da43b1 150 free(to_free);
c6e8c800 151 return 1; /* file exists */
e4da43b1
JK
152 }
153 if (errno == ENOENT || errno == ENOTDIR) {
154 free(to_free);
c6e8c800 155 return 0; /* file does not exist */
e4da43b1 156 }
c6e8c800
JH
157 die_errno("failed to stat '%s'", arg);
158}
159
023e37c3
MM
160static void NORETURN die_verify_filename(const char *prefix,
161 const char *arg,
162 int diagnose_misspelt_rev)
009fee47 163{
023e37c3 164 if (!diagnose_misspelt_rev)
ab33a76e
VA
165 die(_("%s: no such path in the working tree.\n"
166 "Use 'git <command> -- <path>...' to specify paths that do not exist locally."),
023e37c3 167 arg);
0e539dca
JH
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
8c135ea2 172 * let maybe_die_on_misspelt_object_name() even trigger.
0e539dca
JH
173 */
174 if (!(arg[0] == ':' && !isalnum(arg[1])))
8c135ea2 175 maybe_die_on_misspelt_object_name(arg, prefix);
0e539dca 176
009fee47 177 /* ... or fall back the most general message. */
ab33a76e
VA
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);
009fee47
MM
181
182}
183
e23d0b4a
LT
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")
023e37c3
MM
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).
e23d0b4a 203 */
023e37c3
MM
204void verify_filename(const char *prefix,
205 const char *arg,
206 int diagnose_misspelt_rev)
e23d0b4a 207{
e23d0b4a
LT
208 if (*arg == '-')
209 die("bad flag '%s' used after filename", arg);
df714f81 210 if (check_filename(prefix, arg) || !no_wildcard(arg))
e23d0b4a 211 return;
023e37c3 212 die_verify_filename(prefix, arg, diagnose_misspelt_rev);
e23d0b4a
LT
213}
214
ea92f41f
JH
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 */
220void verify_non_filename(const char *prefix, const char *arg)
221{
7ae3df8c 222 if (!is_inside_work_tree() || is_inside_git_dir())
68025633 223 return;
ea92f41f
JH
224 if (*arg == '-')
225 return; /* flag */
c6e8c800
JH
226 if (!check_filename(prefix, arg))
227 return;
ab33a76e
VA
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);
ea92f41f
JH
231}
232
31e26ebc 233int get_common_dir(struct strbuf *sb, const char *gitdir)
11f9dd71
MK
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
244int get_common_dir_noenv(struct strbuf *sb, const char *gitdir)
4dc4e145
NTND
245{
246 struct strbuf data = STRBUF_INIT;
247 struct strbuf path = STRBUF_INIT;
31e26ebc 248 int ret = 0;
11f9dd71 249
4dc4e145
NTND
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);
33ad9ddd 262 strbuf_add_real_path(sb, path.buf);
31e26ebc 263 ret = 1;
4ac9006f 264 } else {
4dc4e145 265 strbuf_addstr(sb, gitdir);
4ac9006f
BW
266 }
267
4dc4e145
NTND
268 strbuf_release(&data);
269 strbuf_release(&path);
31e26ebc 270 return ret;
4dc4e145 271}
d288a700 272
5f5608bc 273/*
ad1a382f 274 * Test if it looks like we're at a git directory.
5e7bfe25 275 * We want to see:
5f5608bc 276 *
790296fd 277 * - either an objects/ directory _or_ the proper
5f5608bc 278 * GIT_OBJECT_DIRECTORY environment variable
ad1a382f 279 * - a refs/ directory
8098a178 280 * - either a HEAD symlink or a HEAD file that is formatted as
c847f537
JH
281 * a proper "ref:", or a regular file HEAD that has a properly
282 * formatted sha1 object name.
5f5608bc 283 */
b3256eb8 284int is_git_directory(const char *suspect)
5f5608bc 285{
1d186b6f
NTND
286 struct strbuf path = STRBUF_INIT;
287 int ret = 0;
288 size_t len;
ad1a382f 289
4dc4e145
NTND
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);
1d186b6f 297 len = path.len;
4dc4e145
NTND
298
299 /* Check non-worktree-related signatures */
ad1a382f
SP
300 if (getenv(DB_ENVIRONMENT)) {
301 if (access(getenv(DB_ENVIRONMENT), X_OK))
1d186b6f 302 goto done;
ad1a382f
SP
303 }
304 else {
4dc4e145 305 strbuf_setlen(&path, len);
1d186b6f
NTND
306 strbuf_addstr(&path, "/objects");
307 if (access(path.buf, X_OK))
308 goto done;
ad1a382f
SP
309 }
310
1d186b6f
NTND
311 strbuf_setlen(&path, len);
312 strbuf_addstr(&path, "/refs");
313 if (access(path.buf, X_OK))
314 goto done;
ad1a382f 315
1d186b6f
NTND
316 ret = 1;
317done:
318 strbuf_release(&path);
319 return ret;
5f5608bc
LT
320}
321
ffd036b1
JK
322int 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
68025633
JS
339int is_inside_git_dir(void)
340{
e90fdc39
JS
341 if (inside_git_dir < 0)
342 inside_git_dir = is_inside_dir(get_git_dir());
343 return inside_git_dir;
892c41b9
ML
344}
345
892c41b9
ML
346int is_inside_work_tree(void)
347{
e90fdc39
JS
348 if (inside_work_tree < 0)
349 inside_work_tree = is_inside_dir(get_git_work_tree());
350 return inside_work_tree;
892c41b9
ML
351}
352
f3fa1838
JH
353void setup_work_tree(void)
354{
354e6534
JS
355 const char *work_tree, *git_dir;
356 static int initialized = 0;
357
358 if (initialized)
359 return;
fada7674
JK
360
361 if (work_tree_config_is_bogus)
362 die("unable to set up work tree using invalid config");
363
354e6534
JS
364 work_tree = get_git_work_tree();
365 git_dir = get_git_dir();
59f0f2f3 366 if (!is_absolute_path(git_dir))
e2a57aac 367 git_dir = real_path(get_git_dir());
59f0f2f3
MH
368 if (!work_tree || chdir(work_tree))
369 die("This operation must be run in a work tree");
0ed74813
NTND
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
41894ae3 378 set_git_dir(remove_leading_path(git_dir, work_tree));
354e6534 379 initialized = 1;
59f0f2f3
MH
380}
381
2cc7c2c7 382static int check_repo_format(const char *var, const char *value, void *vdata)
31e26ebc 383{
2cc7c2c7 384 struct repository_format *data = vdata;
00a09d57
JK
385 const char *ext;
386
31e26ebc 387 if (strcmp(var, "core.repositoryformatversion") == 0)
2cc7c2c7 388 data->version = git_config_int(var, value);
00a09d57
JK
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 ;
067fbd41 397 else if (!strcmp(ext, "preciousobjects"))
2cc7c2c7 398 data->precious_objects = git_config_bool(var, value);
00a09d57 399 else
2cc7c2c7 400 string_list_append(&data->unknown_extensions, ext);
652f18ee
JK
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);
00a09d57 407 }
31e26ebc
NTND
408 return 0;
409}
410
337e51ce 411static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
9459aa77 412{
7d0fb0da 413 struct strbuf sb = STRBUF_INIT;
2cc7c2c7
JK
414 struct strbuf err = STRBUF_INIT;
415 struct repository_format candidate;
652f18ee 416 int has_common;
00a09d57 417
652f18ee 418 has_common = get_common_dir(&sb, gitdir);
e61a509a 419 strbuf_addstr(&sb, "/config");
652f18ee 420 read_repository_format(&candidate, sb.buf);
2cc7c2c7 421 strbuf_release(&sb);
e61a509a 422
337e51ce 423 /*
2cc7c2c7
JK
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.
337e51ce 427 */
2cc7c2c7
JK
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
2cc7c2c7
JK
441 repository_format_precious_objects = candidate.precious_objects;
442 string_list_clear(&candidate.unknown_extensions, 0);
652f18ee
JK
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;
2cc7c2c7 452 inside_work_tree = -1;
652f18ee
JK
453 }
454 } else {
455 free(candidate.work_tree);
2cc7c2c7
JK
456 }
457
458 return 0;
459}
460
652f18ee 461int read_repository_format(struct repository_format *format, const char *path)
2cc7c2c7
JK
462{
463 memset(format, 0, sizeof(*format));
464 format->version = -1;
465 format->is_bare = -1;
466 string_list_init(&format->unknown_extensions, 1);
652f18ee 467 git_config_from_file(check_repo_format, path, format);
2cc7c2c7
JK
468 return format->version;
469}
470
2cc7c2c7
JK
471int verify_repository_format(const struct repository_format *format,
472 struct strbuf *err)
473{
474 if (GIT_REPO_VERSION_READ < format->version) {
274db840 475 strbuf_addf(err, _("Expected git repo version <= %d, found %d"),
2cc7c2c7
JK
476 GIT_REPO_VERSION_READ, format->version);
477 return -1;
478 }
479
480 if (format->version >= 1 && format->unknown_extensions.nr) {
00a09d57
JK
481 int i;
482
274db840 483 strbuf_addstr(err, _("unknown repository extensions found:"));
00a09d57 484
2cc7c2c7
JK
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;
00a09d57
JK
489 }
490
2cc7c2c7 491 return 0;
9459aa77
NTND
492}
493
5f29433f
SB
494void 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
b44ebb19
LH
518/*
519 * Try to read the location of the git directory from the .git file,
520 * return path to git directory if found.
a93bedad
EE
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).
b44ebb19 526 */
a93bedad 527const char *read_gitfile_gently(const char *path, int *return_error_code)
b44ebb19 528{
921bdd96 529 const int max_file_size = 1 << 20; /* 1MB */
a93bedad
EE
530 int error_code = 0;
531 char *buf = NULL;
532 char *dir = NULL;
40c813e0 533 const char *slash;
b44ebb19
LH
534 struct stat st;
535 int fd;
b1905aea 536 ssize_t len;
b44ebb19 537
a93bedad 538 if (stat(path, &st)) {
5c4003ca 539 /* NEEDSWORK: discern between ENOENT vs other errors */
a93bedad
EE
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 }
921bdd96
EE
547 if (st.st_size > max_file_size) {
548 error_code = READ_GITFILE_ERR_TOO_LARGE;
549 goto cleanup_return;
550 }
b44ebb19 551 fd = open(path, O_RDONLY);
a93bedad
EE
552 if (fd < 0) {
553 error_code = READ_GITFILE_ERR_OPEN_FAILED;
554 goto cleanup_return;
555 }
3733e694 556 buf = xmallocz(st.st_size);
b44ebb19
LH
557 len = read_in_full(fd, buf, st.st_size);
558 close(fd);
a93bedad
EE
559 if (len != st.st_size) {
560 error_code = READ_GITFILE_ERR_READ_FAILED;
561 goto cleanup_return;
562 }
a93bedad
EE
563 if (!starts_with(buf, "gitdir: ")) {
564 error_code = READ_GITFILE_ERR_INVALID_FORMAT;
565 goto cleanup_return;
566 }
b44ebb19
LH
567 while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
568 len--;
a93bedad
EE
569 if (len < 9) {
570 error_code = READ_GITFILE_ERR_NO_PATH;
571 goto cleanup_return;
572 }
b44ebb19 573 buf[len] = '\0';
40c813e0
BK
574 dir = buf + 8;
575
576 if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
577 size_t pathlen = slash+1 - path;
75faa45a
JK
578 dir = xstrfmt("%.*s%.*s", (int)pathlen, path,
579 (int)(len - 8), buf + 8);
40c813e0
BK
580 free(buf);
581 buf = dir;
582 }
a93bedad
EE
583 if (!is_git_directory(dir)) {
584 error_code = READ_GITFILE_ERR_NOT_A_REPO;
585 goto cleanup_return;
586 }
e2a57aac 587 path = real_path(dir);
40c813e0 588
a93bedad 589cleanup_return:
a93bedad
EE
590 if (return_error_code)
591 *return_error_code = error_code;
5f29433f
SB
592 else if (error_code)
593 read_gitfile_error_die(error_code, path, dir);
a93bedad 594
b44ebb19 595 free(buf);
38ae8784 596 return error_code ? NULL : path;
b44ebb19
LH
597}
598
e4e30347 599static const char *setup_explicit_git_dir(const char *gitdirenv,
7333ed17 600 struct strbuf *cwd,
b3f66fd3 601 int *nongit_ok)
e4e30347 602{
b3f66fd3
NTND
603 const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
604 const char *worktree;
605 char *gitfile;
9b125da4 606 int offset;
e4e30347
JN
607
608 if (PATH_MAX - 40 < strlen(gitdirenv))
609 die("'$%s' too big", GIT_DIR_ENVIRONMENT);
b3f66fd3 610
13d6ec91 611 gitfile = (char*)read_gitfile(gitdirenv);
b3f66fd3
NTND
612 if (gitfile) {
613 gitfile = xstrdup(gitfile);
614 gitdirenv = gitfile;
615 }
616
e4e30347
JN
617 if (!is_git_directory(gitdirenv)) {
618 if (nongit_ok) {
619 *nongit_ok = 1;
b3f66fd3 620 free(gitfile);
e4e30347
JN
621 return NULL;
622 }
623 die("Not a git repository: '%s'", gitdirenv);
624 }
b3f66fd3
NTND
625
626 if (check_repository_format_gently(gitdirenv, nongit_ok)) {
627 free(gitfile);
628 return NULL;
e4e30347 629 }
b3f66fd3
NTND
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) {
fada7674
JK
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 }
b3f66fd3
NTND
640
641 /* #18, #26 */
642 set_git_dir(gitdirenv);
643 free(gitfile);
e4e30347 644 return NULL;
b3f66fd3
NTND
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 {
56b9f6e7 650 char *core_worktree;
b3f66fd3
NTND
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);
56b9f6e7 655 core_worktree = xgetcwd();
7333ed17 656 if (chdir(cwd->buf))
b3f66fd3
NTND
657 die_errno("Could not come back to cwd");
658 set_git_work_tree(core_worktree);
56b9f6e7 659 free(core_worktree);
b3f66fd3
NTND
660 }
661 }
2cd83d10
JK
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 }
b3f66fd3
NTND
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 */
7333ed17 675 if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */
b3f66fd3
NTND
676 set_git_dir(gitdirenv);
677 free(gitfile);
e4e30347 678 return NULL;
b3f66fd3 679 }
e4e30347 680
7333ed17 681 offset = dir_inside_of(cwd->buf, worktree);
9b125da4 682 if (offset >= 0) { /* cwd inside worktree? */
e2a57aac 683 set_git_dir(real_path(gitdirenv));
b3f66fd3
NTND
684 if (chdir(worktree))
685 die_errno("Could not chdir to '%s'", worktree);
7333ed17 686 strbuf_addch(cwd, '/');
b3f66fd3 687 free(gitfile);
7333ed17 688 return cwd->buf + offset;
93a00542 689 }
b3f66fd3
NTND
690
691 /* cwd outside worktree */
692 set_git_dir(gitdirenv);
693 free(gitfile);
694 return NULL;
93a00542
JN
695}
696
9951d3b3 697static const char *setup_discovered_git_dir(const char *gitdir,
7333ed17 698 struct strbuf *cwd, int offset,
9951d3b3 699 int *nongit_ok)
98937bef 700{
9951d3b3
NTND
701 if (check_repository_format_gently(gitdir, nongit_ok))
702 return NULL;
98937bef 703
4868b2ea
JN
704 /* --work-tree is set without --git-dir; use discovered one */
705 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
7333ed17 706 if (offset != cwd->len && !is_absolute_path(gitdir))
ce83eadd 707 gitdir = real_pathdup(gitdir, 1);
7333ed17 708 if (chdir(cwd->buf))
4868b2ea 709 die_errno("Could not come back to cwd");
7333ed17 710 return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
4868b2ea
JN
711 }
712
9951d3b3
NTND
713 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
714 if (is_bare_repository_cfg > 0) {
7333ed17
RS
715 set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir));
716 if (chdir(cwd->buf))
9951d3b3 717 die_errno("Could not come back to cwd");
98937bef 718 return NULL;
9951d3b3 719 }
98937bef 720
9951d3b3
NTND
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);
98937bef 725 inside_git_dir = 0;
9951d3b3 726 inside_work_tree = 1;
7333ed17 727 if (offset == cwd->len)
98937bef
NTND
728 return NULL;
729
df380d58
JS
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 */
7333ed17
RS
734 strbuf_addch(cwd, '/');
735 return cwd->buf + offset;
98937bef
NTND
736}
737
1cd8031b 738/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
7333ed17
RS
739static const char *setup_bare_git_dir(struct strbuf *cwd, int offset,
740 int *nongit_ok)
68698da5
JN
741{
742 int root_len;
743
1cd8031b
NTND
744 if (check_repository_format_gently(".", nongit_ok))
745 return NULL;
746
2cd83d10
JK
747 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
748
4868b2ea
JN
749 /* --work-tree is set without --git-dir; use discovered one */
750 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
751 const char *gitdir;
752
7333ed17
RS
753 gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset);
754 if (chdir(cwd->buf))
4868b2ea 755 die_errno("Could not come back to cwd");
7333ed17 756 return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
4868b2ea
JN
757 }
758
68698da5 759 inside_git_dir = 1;
1cd8031b 760 inside_work_tree = 0;
7333ed17
RS
761 if (offset != cwd->len) {
762 if (chdir(cwd->buf))
8fc0ae80 763 die_errno("Cannot come back to cwd");
7333ed17
RS
764 root_len = offset_1st_component(cwd->buf);
765 strbuf_setlen(cwd, offset > root_len ? offset : root_len);
766 set_git_dir(cwd->buf);
337e51ce 767 }
1cd8031b 768 else
68698da5 769 set_git_dir(".");
68698da5
JN
770 return NULL;
771}
772
f161edeb
JN
773static const char *setup_nongit(const char *cwd, int *nongit_ok)
774{
775 if (!nongit_ok)
2ff30e67 776 die(_("Not a git repository (or any of the parent directories): %s"), DEFAULT_GIT_DIR_ENVIRONMENT);
f161edeb 777 if (chdir(cwd))
2ff30e67 778 die_errno(_("Cannot come back to cwd"));
f161edeb
JN
779 *nongit_ok = 1;
780 return NULL;
781}
782
2565b43b 783static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len)
60c98d1e
JN
784{
785 struct stat buf;
2565b43b
CB
786 if (stat(path, &buf)) {
787 die_errno("failed to stat '%*s%s%s'",
788 prefix_len,
60c98d1e
JN
789 prefix ? prefix : "",
790 prefix ? "/" : "", path);
2565b43b 791 }
60c98d1e
JN
792 return buf.st_dev;
793}
794
9e2326c7 795/*
1b77d83c
MH
796 * A "string_list_each_func_t" function that canonicalizes an entry
797 * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or
7ec30aaa
MH
798 * discards it if unusable. The presence of an empty entry in
799 * GIT_CEILING_DIRECTORIES turns off canonicalization for all
800 * subsequent entries.
9e2326c7 801 */
1b77d83c 802static int canonicalize_ceiling_entry(struct string_list_item *item,
7ec30aaa 803 void *cb_data)
9e2326c7 804{
7ec30aaa 805 int *empty_entry_found = cb_data;
1b77d83c 806 char *ceil = item->string;
9e2326c7 807
7ec30aaa
MH
808 if (!*ceil) {
809 *empty_entry_found = 1;
9e2326c7 810 return 0;
7ec30aaa 811 } else if (!is_absolute_path(ceil)) {
9e2326c7 812 return 0;
7ec30aaa
MH
813 } else if (*empty_entry_found) {
814 /* Keep entry but do not canonicalize it */
815 return 1;
816 } else {
ce83eadd 817 char *real_path = real_pathdup(ceil, 0);
4ac9006f 818 if (!real_path) {
7ec30aaa 819 return 0;
4ac9006f 820 }
7ec30aaa 821 free(item->string);
4ac9006f 822 item->string = real_path;
7ec30aaa
MH
823 return 1;
824 }
9e2326c7
MH
825}
826
ce9b8aab
JS
827enum 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,
01017dce
JS
834 GIT_DIR_HIT_MOUNT_POINT = -2,
835 GIT_DIR_INVALID_GITFILE = -3
ce9b8aab
JS
836};
837
e90fdc39
JS
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.
ce9b8aab
JS
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).
e90fdc39 850 */
ce9b8aab 851static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir,
01017dce
JS
852 struct strbuf *gitdir,
853 int die_on_error)
d288a700 854{
0454dd93 855 const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
31171d9e 856 struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
ce9b8aab
JS
857 const char *gitdirenv;
858 int ceil_offset = -1, min_offset = has_dos_drive_prefix(dir->buf) ? 3 : 1;
c7d1d1b1
RH
859 dev_t current_device = 0;
860 int one_filesystem = 1;
d288a700 861
e90fdc39
JS
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 */
ad1a382f 867 gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
ce9b8aab
JS
868 if (gitdirenv) {
869 strbuf_addstr(gitdir, gitdirenv);
870 return GIT_DIR_EXPLICIT;
871 }
d288a700 872
31171d9e 873 if (env_ceiling_dirs) {
7ec30aaa
MH
874 int empty_entry_found = 0;
875
31171d9e 876 string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1);
1b77d83c 877 filter_string_list(&ceiling_dirs, 0,
7ec30aaa 878 canonicalize_ceiling_entry, &empty_entry_found);
ce9b8aab 879 ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs);
31171d9e
MH
880 string_list_clear(&ceiling_dirs, 0);
881 }
882
ce9b8aab
JS
883 if (ceil_offset < 0)
884 ceil_offset = min_offset - 2;
d288a700 885
892c41b9 886 /*
ce9b8aab 887 * Test in the following order (relative to the dir):
b44ebb19 888 * - .git (file containing "gitdir: <path>")
e90fdc39
JS
889 * - .git/
890 * - ./ (bare)
b44ebb19 891 * - ../.git
e90fdc39
JS
892 * - ../.git/
893 * - ../ (bare)
894 * - ../../.git/
895 * etc.
892c41b9 896 */
cf87463e 897 one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
60c98d1e 898 if (one_filesystem)
ce9b8aab 899 current_device = get_device_or_die(dir->buf, NULL, 0);
e90fdc39 900 for (;;) {
01017dce 901 int offset = dir->len, error_code = 0;
ce9b8aab
JS
902
903 if (offset > min_offset)
904 strbuf_addch(dir, '/');
905 strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT);
01017dce
JS
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) {
5c4003ca 911 /* NEEDSWORK: fail if .git is not file nor dir */
01017dce
JS
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;
9951d3b3 916 }
ce9b8aab 917 strbuf_setlen(dir, offset);
9951d3b3 918 if (gitdirenv) {
ce9b8aab
JS
919 strbuf_addstr(gitdir, gitdirenv);
920 return GIT_DIR_DISCOVERED;
9951d3b3 921 }
9951d3b3 922
ce9b8aab
JS
923 if (is_git_directory(dir->buf)) {
924 strbuf_addstr(gitdir, ".");
925 return GIT_DIR_BARE;
502ffe34 926 }
9951d3b3 927
ce9b8aab
JS
928 if (offset <= min_offset)
929 return GIT_DIR_HIT_CEILING;
1cd8031b 930
ce9b8aab 931 while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset]))
6c1e6544 932 ; /* continue */
ce9b8aab
JS
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;
892c41b9 940 }
d288a700 941}
5e7bfe25 942
16ac8b8d
JS
943const 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;
01017dce 953 if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) {
16ac8b8d
JS
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
a60645f9
NTND
986const char *setup_git_directory_gently(int *nongit_ok)
987{
ce9b8aab
JS
988 static struct strbuf cwd = STRBUF_INIT;
989 struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT;
b58a68c1 990 const char *prefix, *env_prefix;
a60645f9 991
ce9b8aab
JS
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
01017dce 1013 switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) {
ce9b8aab
JS
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
3736c925 1048 env_prefix = getenv(GIT_TOPLEVEL_PREFIX_ENVIRONMENT);
b58a68c1
BW
1049 if (env_prefix)
1050 prefix = env_prefix;
1051
1f5d271f 1052 if (prefix)
a6f7f9a3 1053 setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1);
1f5d271f 1054 else
a6f7f9a3 1055 setenv(GIT_PREFIX_ENVIRONMENT, "", 1);
1f5d271f 1056
46c3cd44
JK
1057 startup_info->have_repository = !nongit_ok || !*nongit_ok;
1058 startup_info->prefix = prefix;
1059
ce9b8aab
JS
1060 strbuf_release(&dir);
1061 strbuf_release(&gitdir);
1062
a60645f9
NTND
1063 return prefix;
1064}
1065
94df2506
JH
1066int git_config_perm(const char *var, const char *value)
1067{
06cbe855
HO
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
5a688fe4 1092 * a chmod value to restrict to.
06cbe855
HO
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;
94df2506 1101 }
06cbe855
HO
1102
1103 /* A filemode value was given: 0xxx */
1104
1105 if ((i & 0600) != 0600)
2ff30e67 1106 die(_("Problem with core.sharedRepository filemode value "
06cbe855 1107 "(0%.3o).\nThe owner of files must always have "
2ff30e67 1108 "read and write permissions."), i);
06cbe855
HO
1109
1110 /*
1111 * Mask filemode value. Others can not get write permission.
1112 * x flags for directories are handled separately.
1113 */
5a688fe4 1114 return -(i & 0666);
94df2506
JH
1115}
1116
4b0d1eeb 1117void check_repository_format(void)
ab9cb76f 1118{
f1c126bd
JK
1119 check_repository_format_gently(get_git_dir(), NULL);
1120 startup_info->have_repository = 1;
ab9cb76f
JH
1121}
1122
e1e5ec86
CB
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 */
5e7bfe25
JH
1129const char *setup_git_directory(void)
1130{
b3f66fd3 1131 return setup_git_directory_gently(NULL);
5e7bfe25 1132}
abc06822 1133
40d96325 1134const char *resolve_gitdir_gently(const char *suspect, int *return_error_code)
abc06822
FG
1135{
1136 if (is_git_directory(suspect))
1137 return suspect;
40d96325 1138 return read_gitfile_gently(suspect, return_error_code);
abc06822 1139}
1d999ddd
TR
1140
1141/* if any standard file descriptor is missing open it to /dev/null */
1142void 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}
de0957ce
NTND
1152
1153int 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}