check_filename(): refactor ":/" handling
[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
59556548 140 if (starts_with(arg, ":/")) {
4db86e8b
NTND
141 if (arg[2] == '\0') /* ":/" is root dir, always exists */
142 return 1;
a08cbcda
JK
143 arg += 2;
144 prefix = NULL;
145 }
146
147 if (prefix)
148 arg = to_free = prefix_filename(prefix, arg);
149
150 if (!lstat(arg, &st)) {
e4da43b1 151 free(to_free);
c6e8c800 152 return 1; /* file exists */
e4da43b1
JK
153 }
154 if (errno == ENOENT || errno == ENOTDIR) {
155 free(to_free);
c6e8c800 156 return 0; /* file does not exist */
e4da43b1 157 }
c6e8c800
JH
158 die_errno("failed to stat '%s'", arg);
159}
160
023e37c3
MM
161static void NORETURN die_verify_filename(const char *prefix,
162 const char *arg,
163 int diagnose_misspelt_rev)
009fee47 164{
023e37c3 165 if (!diagnose_misspelt_rev)
ab33a76e
VA
166 die(_("%s: no such path in the working tree.\n"
167 "Use 'git <command> -- <path>...' to specify paths that do not exist locally."),
023e37c3 168 arg);
0e539dca
JH
169 /*
170 * Saying "'(icase)foo' does not exist in the index" when the
171 * user gave us ":(icase)foo" is just stupid. A magic pathspec
172 * begins with a colon and is followed by a non-alnum; do not
8c135ea2 173 * let maybe_die_on_misspelt_object_name() even trigger.
0e539dca
JH
174 */
175 if (!(arg[0] == ':' && !isalnum(arg[1])))
8c135ea2 176 maybe_die_on_misspelt_object_name(arg, prefix);
0e539dca 177
009fee47 178 /* ... or fall back the most general message. */
ab33a76e
VA
179 die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
180 "Use '--' to separate paths from revisions, like this:\n"
181 "'git <command> [<revision>...] -- [<file>...]'"), arg);
009fee47
MM
182
183}
184
e23d0b4a
LT
185/*
186 * Verify a filename that we got as an argument for a pathspec
187 * entry. Note that a filename that begins with "-" never verifies
188 * as true, because even if such a filename were to exist, we want
189 * it to be preceded by the "--" marker (or we want the user to
190 * use a format like "./-filename")
023e37c3
MM
191 *
192 * The "diagnose_misspelt_rev" is used to provide a user-friendly
193 * diagnosis when dying upon finding that "name" is not a pathname.
194 * If set to 1, the diagnosis will try to diagnose "name" as an
195 * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
196 * will only complain about an inexisting file.
197 *
198 * This function is typically called to check that a "file or rev"
199 * argument is unambiguous. In this case, the caller will want
200 * diagnose_misspelt_rev == 1 when verifying the first non-rev
201 * argument (which could have been a revision), and
202 * diagnose_misspelt_rev == 0 for the next ones (because we already
203 * saw a filename, there's not ambiguity anymore).
e23d0b4a 204 */
023e37c3
MM
205void verify_filename(const char *prefix,
206 const char *arg,
207 int diagnose_misspelt_rev)
e23d0b4a 208{
e23d0b4a
LT
209 if (*arg == '-')
210 die("bad flag '%s' used after filename", arg);
df714f81 211 if (check_filename(prefix, arg) || !no_wildcard(arg))
e23d0b4a 212 return;
023e37c3 213 die_verify_filename(prefix, arg, diagnose_misspelt_rev);
e23d0b4a
LT
214}
215
ea92f41f
JH
216/*
217 * Opposite of the above: the command line did not have -- marker
218 * and we parsed the arg as a refname. It should not be interpretable
219 * as a filename.
220 */
221void verify_non_filename(const char *prefix, const char *arg)
222{
7ae3df8c 223 if (!is_inside_work_tree() || is_inside_git_dir())
68025633 224 return;
ea92f41f
JH
225 if (*arg == '-')
226 return; /* flag */
c6e8c800
JH
227 if (!check_filename(prefix, arg))
228 return;
ab33a76e
VA
229 die(_("ambiguous argument '%s': both revision and filename\n"
230 "Use '--' to separate paths from revisions, like this:\n"
231 "'git <command> [<revision>...] -- [<file>...]'"), arg);
ea92f41f
JH
232}
233
31e26ebc 234int get_common_dir(struct strbuf *sb, const char *gitdir)
11f9dd71
MK
235{
236 const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT);
237 if (git_env_common_dir) {
238 strbuf_addstr(sb, git_env_common_dir);
239 return 1;
240 } else {
241 return get_common_dir_noenv(sb, gitdir);
242 }
243}
244
245int get_common_dir_noenv(struct strbuf *sb, const char *gitdir)
4dc4e145
NTND
246{
247 struct strbuf data = STRBUF_INIT;
248 struct strbuf path = STRBUF_INIT;
31e26ebc 249 int ret = 0;
11f9dd71 250
4dc4e145
NTND
251 strbuf_addf(&path, "%s/commondir", gitdir);
252 if (file_exists(path.buf)) {
253 if (strbuf_read_file(&data, path.buf, 0) <= 0)
254 die_errno(_("failed to read %s"), path.buf);
255 while (data.len && (data.buf[data.len - 1] == '\n' ||
256 data.buf[data.len - 1] == '\r'))
257 data.len--;
258 data.buf[data.len] = '\0';
259 strbuf_reset(&path);
260 if (!is_absolute_path(data.buf))
261 strbuf_addf(&path, "%s/", gitdir);
262 strbuf_addbuf(&path, &data);
33ad9ddd 263 strbuf_add_real_path(sb, path.buf);
31e26ebc 264 ret = 1;
4ac9006f 265 } else {
4dc4e145 266 strbuf_addstr(sb, gitdir);
4ac9006f
BW
267 }
268
4dc4e145
NTND
269 strbuf_release(&data);
270 strbuf_release(&path);
31e26ebc 271 return ret;
4dc4e145 272}
d288a700 273
5f5608bc 274/*
ad1a382f 275 * Test if it looks like we're at a git directory.
5e7bfe25 276 * We want to see:
5f5608bc 277 *
790296fd 278 * - either an objects/ directory _or_ the proper
5f5608bc 279 * GIT_OBJECT_DIRECTORY environment variable
ad1a382f 280 * - a refs/ directory
8098a178 281 * - either a HEAD symlink or a HEAD file that is formatted as
c847f537
JH
282 * a proper "ref:", or a regular file HEAD that has a properly
283 * formatted sha1 object name.
5f5608bc 284 */
b3256eb8 285int is_git_directory(const char *suspect)
5f5608bc 286{
1d186b6f
NTND
287 struct strbuf path = STRBUF_INIT;
288 int ret = 0;
289 size_t len;
ad1a382f 290
4dc4e145
NTND
291 /* Check worktree-related signatures */
292 strbuf_addf(&path, "%s/HEAD", suspect);
293 if (validate_headref(path.buf))
294 goto done;
295
296 strbuf_reset(&path);
297 get_common_dir(&path, suspect);
1d186b6f 298 len = path.len;
4dc4e145
NTND
299
300 /* Check non-worktree-related signatures */
ad1a382f
SP
301 if (getenv(DB_ENVIRONMENT)) {
302 if (access(getenv(DB_ENVIRONMENT), X_OK))
1d186b6f 303 goto done;
ad1a382f
SP
304 }
305 else {
4dc4e145 306 strbuf_setlen(&path, len);
1d186b6f
NTND
307 strbuf_addstr(&path, "/objects");
308 if (access(path.buf, X_OK))
309 goto done;
ad1a382f
SP
310 }
311
1d186b6f
NTND
312 strbuf_setlen(&path, len);
313 strbuf_addstr(&path, "/refs");
314 if (access(path.buf, X_OK))
315 goto done;
ad1a382f 316
1d186b6f
NTND
317 ret = 1;
318done:
319 strbuf_release(&path);
320 return ret;
5f5608bc
LT
321}
322
ffd036b1
JK
323int is_nonbare_repository_dir(struct strbuf *path)
324{
325 int ret = 0;
326 int gitfile_error;
327 size_t orig_path_len = path->len;
328 assert(orig_path_len != 0);
329 strbuf_complete(path, '/');
330 strbuf_addstr(path, ".git");
331 if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf))
332 ret = 1;
333 if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED ||
334 gitfile_error == READ_GITFILE_ERR_READ_FAILED)
335 ret = 1;
336 strbuf_setlen(path, orig_path_len);
337 return ret;
338}
339
68025633
JS
340int is_inside_git_dir(void)
341{
e90fdc39
JS
342 if (inside_git_dir < 0)
343 inside_git_dir = is_inside_dir(get_git_dir());
344 return inside_git_dir;
892c41b9
ML
345}
346
892c41b9
ML
347int is_inside_work_tree(void)
348{
e90fdc39
JS
349 if (inside_work_tree < 0)
350 inside_work_tree = is_inside_dir(get_git_work_tree());
351 return inside_work_tree;
892c41b9
ML
352}
353
f3fa1838
JH
354void setup_work_tree(void)
355{
354e6534
JS
356 const char *work_tree, *git_dir;
357 static int initialized = 0;
358
359 if (initialized)
360 return;
fada7674
JK
361
362 if (work_tree_config_is_bogus)
363 die("unable to set up work tree using invalid config");
364
354e6534
JS
365 work_tree = get_git_work_tree();
366 git_dir = get_git_dir();
59f0f2f3 367 if (!is_absolute_path(git_dir))
e2a57aac 368 git_dir = real_path(get_git_dir());
59f0f2f3
MH
369 if (!work_tree || chdir(work_tree))
370 die("This operation must be run in a work tree");
0ed74813
NTND
371
372 /*
373 * Make sure subsequent git processes find correct worktree
374 * if $GIT_WORK_TREE is set relative
375 */
376 if (getenv(GIT_WORK_TREE_ENVIRONMENT))
377 setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
378
41894ae3 379 set_git_dir(remove_leading_path(git_dir, work_tree));
354e6534 380 initialized = 1;
59f0f2f3
MH
381}
382
2cc7c2c7 383static int check_repo_format(const char *var, const char *value, void *vdata)
31e26ebc 384{
2cc7c2c7 385 struct repository_format *data = vdata;
00a09d57
JK
386 const char *ext;
387
31e26ebc 388 if (strcmp(var, "core.repositoryformatversion") == 0)
2cc7c2c7 389 data->version = git_config_int(var, value);
00a09d57
JK
390 else if (skip_prefix(var, "extensions.", &ext)) {
391 /*
392 * record any known extensions here; otherwise,
393 * we fall through to recording it as unknown, and
394 * check_repository_format will complain
395 */
396 if (!strcmp(ext, "noop"))
397 ;
067fbd41 398 else if (!strcmp(ext, "preciousobjects"))
2cc7c2c7 399 data->precious_objects = git_config_bool(var, value);
00a09d57 400 else
2cc7c2c7 401 string_list_append(&data->unknown_extensions, ext);
652f18ee
JK
402 } else if (strcmp(var, "core.bare") == 0) {
403 data->is_bare = git_config_bool(var, value);
404 } else if (strcmp(var, "core.worktree") == 0) {
405 if (!value)
406 return config_error_nonbool(var);
407 data->work_tree = xstrdup(value);
00a09d57 408 }
31e26ebc
NTND
409 return 0;
410}
411
337e51ce 412static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
9459aa77 413{
7d0fb0da 414 struct strbuf sb = STRBUF_INIT;
2cc7c2c7
JK
415 struct strbuf err = STRBUF_INIT;
416 struct repository_format candidate;
652f18ee 417 int has_common;
00a09d57 418
652f18ee 419 has_common = get_common_dir(&sb, gitdir);
e61a509a 420 strbuf_addstr(&sb, "/config");
652f18ee 421 read_repository_format(&candidate, sb.buf);
2cc7c2c7 422 strbuf_release(&sb);
e61a509a 423
337e51ce 424 /*
2cc7c2c7
JK
425 * For historical use of check_repository_format() in git-init,
426 * we treat a missing config as a silent "ok", even when nongit_ok
427 * is unset.
337e51ce 428 */
2cc7c2c7
JK
429 if (candidate.version < 0)
430 return 0;
431
432 if (verify_repository_format(&candidate, &err) < 0) {
433 if (nongit_ok) {
434 warning("%s", err.buf);
435 strbuf_release(&err);
436 *nongit_ok = -1;
437 return -1;
438 }
439 die("%s", err.buf);
440 }
441
2cc7c2c7
JK
442 repository_format_precious_objects = candidate.precious_objects;
443 string_list_clear(&candidate.unknown_extensions, 0);
652f18ee
JK
444 if (!has_common) {
445 if (candidate.is_bare != -1) {
446 is_bare_repository_cfg = candidate.is_bare;
447 if (is_bare_repository_cfg == 1)
448 inside_work_tree = -1;
449 }
450 if (candidate.work_tree) {
451 free(git_work_tree_cfg);
452 git_work_tree_cfg = candidate.work_tree;
2cc7c2c7 453 inside_work_tree = -1;
652f18ee
JK
454 }
455 } else {
456 free(candidate.work_tree);
2cc7c2c7
JK
457 }
458
459 return 0;
460}
461
652f18ee 462int read_repository_format(struct repository_format *format, const char *path)
2cc7c2c7
JK
463{
464 memset(format, 0, sizeof(*format));
465 format->version = -1;
466 format->is_bare = -1;
467 string_list_init(&format->unknown_extensions, 1);
652f18ee 468 git_config_from_file(check_repo_format, path, format);
2cc7c2c7
JK
469 return format->version;
470}
471
2cc7c2c7
JK
472int verify_repository_format(const struct repository_format *format,
473 struct strbuf *err)
474{
475 if (GIT_REPO_VERSION_READ < format->version) {
274db840 476 strbuf_addf(err, _("Expected git repo version <= %d, found %d"),
2cc7c2c7
JK
477 GIT_REPO_VERSION_READ, format->version);
478 return -1;
479 }
480
481 if (format->version >= 1 && format->unknown_extensions.nr) {
00a09d57
JK
482 int i;
483
274db840 484 strbuf_addstr(err, _("unknown repository extensions found:"));
00a09d57 485
2cc7c2c7
JK
486 for (i = 0; i < format->unknown_extensions.nr; i++)
487 strbuf_addf(err, "\n\t%s",
488 format->unknown_extensions.items[i].string);
489 return -1;
00a09d57
JK
490 }
491
2cc7c2c7 492 return 0;
9459aa77
NTND
493}
494
5f29433f
SB
495void read_gitfile_error_die(int error_code, const char *path, const char *dir)
496{
497 switch (error_code) {
498 case READ_GITFILE_ERR_STAT_FAILED:
499 case READ_GITFILE_ERR_NOT_A_FILE:
500 /* non-fatal; follow return path */
501 break;
502 case READ_GITFILE_ERR_OPEN_FAILED:
503 die_errno("Error opening '%s'", path);
504 case READ_GITFILE_ERR_TOO_LARGE:
505 die("Too large to be a .git file: '%s'", path);
506 case READ_GITFILE_ERR_READ_FAILED:
507 die("Error reading %s", path);
508 case READ_GITFILE_ERR_INVALID_FORMAT:
509 die("Invalid gitfile format: %s", path);
510 case READ_GITFILE_ERR_NO_PATH:
511 die("No path in gitfile: %s", path);
512 case READ_GITFILE_ERR_NOT_A_REPO:
513 die("Not a git repository: %s", dir);
514 default:
515 die("BUG: unknown error code");
516 }
517}
518
b44ebb19
LH
519/*
520 * Try to read the location of the git directory from the .git file,
521 * return path to git directory if found.
a93bedad
EE
522 *
523 * On failure, if return_error_code is not NULL, return_error_code
524 * will be set to an error code and NULL will be returned. If
525 * return_error_code is NULL the function will die instead (for most
526 * cases).
b44ebb19 527 */
a93bedad 528const char *read_gitfile_gently(const char *path, int *return_error_code)
b44ebb19 529{
921bdd96 530 const int max_file_size = 1 << 20; /* 1MB */
a93bedad
EE
531 int error_code = 0;
532 char *buf = NULL;
533 char *dir = NULL;
40c813e0 534 const char *slash;
b44ebb19
LH
535 struct stat st;
536 int fd;
b1905aea 537 ssize_t len;
b44ebb19 538
a93bedad 539 if (stat(path, &st)) {
5c4003ca 540 /* NEEDSWORK: discern between ENOENT vs other errors */
a93bedad
EE
541 error_code = READ_GITFILE_ERR_STAT_FAILED;
542 goto cleanup_return;
543 }
544 if (!S_ISREG(st.st_mode)) {
545 error_code = READ_GITFILE_ERR_NOT_A_FILE;
546 goto cleanup_return;
547 }
921bdd96
EE
548 if (st.st_size > max_file_size) {
549 error_code = READ_GITFILE_ERR_TOO_LARGE;
550 goto cleanup_return;
551 }
b44ebb19 552 fd = open(path, O_RDONLY);
a93bedad
EE
553 if (fd < 0) {
554 error_code = READ_GITFILE_ERR_OPEN_FAILED;
555 goto cleanup_return;
556 }
3733e694 557 buf = xmallocz(st.st_size);
b44ebb19
LH
558 len = read_in_full(fd, buf, st.st_size);
559 close(fd);
a93bedad
EE
560 if (len != st.st_size) {
561 error_code = READ_GITFILE_ERR_READ_FAILED;
562 goto cleanup_return;
563 }
a93bedad
EE
564 if (!starts_with(buf, "gitdir: ")) {
565 error_code = READ_GITFILE_ERR_INVALID_FORMAT;
566 goto cleanup_return;
567 }
b44ebb19
LH
568 while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
569 len--;
a93bedad
EE
570 if (len < 9) {
571 error_code = READ_GITFILE_ERR_NO_PATH;
572 goto cleanup_return;
573 }
b44ebb19 574 buf[len] = '\0';
40c813e0
BK
575 dir = buf + 8;
576
577 if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
578 size_t pathlen = slash+1 - path;
75faa45a
JK
579 dir = xstrfmt("%.*s%.*s", (int)pathlen, path,
580 (int)(len - 8), buf + 8);
40c813e0
BK
581 free(buf);
582 buf = dir;
583 }
a93bedad
EE
584 if (!is_git_directory(dir)) {
585 error_code = READ_GITFILE_ERR_NOT_A_REPO;
586 goto cleanup_return;
587 }
e2a57aac 588 path = real_path(dir);
40c813e0 589
a93bedad 590cleanup_return:
a93bedad
EE
591 if (return_error_code)
592 *return_error_code = error_code;
5f29433f
SB
593 else if (error_code)
594 read_gitfile_error_die(error_code, path, dir);
a93bedad 595
b44ebb19 596 free(buf);
38ae8784 597 return error_code ? NULL : path;
b44ebb19
LH
598}
599
e4e30347 600static const char *setup_explicit_git_dir(const char *gitdirenv,
7333ed17 601 struct strbuf *cwd,
b3f66fd3 602 int *nongit_ok)
e4e30347 603{
b3f66fd3
NTND
604 const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
605 const char *worktree;
606 char *gitfile;
9b125da4 607 int offset;
e4e30347
JN
608
609 if (PATH_MAX - 40 < strlen(gitdirenv))
610 die("'$%s' too big", GIT_DIR_ENVIRONMENT);
b3f66fd3 611
13d6ec91 612 gitfile = (char*)read_gitfile(gitdirenv);
b3f66fd3
NTND
613 if (gitfile) {
614 gitfile = xstrdup(gitfile);
615 gitdirenv = gitfile;
616 }
617
e4e30347
JN
618 if (!is_git_directory(gitdirenv)) {
619 if (nongit_ok) {
620 *nongit_ok = 1;
b3f66fd3 621 free(gitfile);
e4e30347
JN
622 return NULL;
623 }
624 die("Not a git repository: '%s'", gitdirenv);
625 }
b3f66fd3
NTND
626
627 if (check_repository_format_gently(gitdirenv, nongit_ok)) {
628 free(gitfile);
629 return NULL;
e4e30347 630 }
b3f66fd3
NTND
631
632 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
633 if (work_tree_env)
634 set_git_work_tree(work_tree_env);
635 else if (is_bare_repository_cfg > 0) {
fada7674
JK
636 if (git_work_tree_cfg) {
637 /* #22.2, #30 */
638 warning("core.bare and core.worktree do not make sense");
639 work_tree_config_is_bogus = 1;
640 }
b3f66fd3
NTND
641
642 /* #18, #26 */
643 set_git_dir(gitdirenv);
644 free(gitfile);
e4e30347 645 return NULL;
b3f66fd3
NTND
646 }
647 else if (git_work_tree_cfg) { /* #6, #14 */
648 if (is_absolute_path(git_work_tree_cfg))
649 set_git_work_tree(git_work_tree_cfg);
650 else {
56b9f6e7 651 char *core_worktree;
b3f66fd3
NTND
652 if (chdir(gitdirenv))
653 die_errno("Could not chdir to '%s'", gitdirenv);
654 if (chdir(git_work_tree_cfg))
655 die_errno("Could not chdir to '%s'", git_work_tree_cfg);
56b9f6e7 656 core_worktree = xgetcwd();
7333ed17 657 if (chdir(cwd->buf))
b3f66fd3
NTND
658 die_errno("Could not come back to cwd");
659 set_git_work_tree(core_worktree);
56b9f6e7 660 free(core_worktree);
b3f66fd3
NTND
661 }
662 }
2cd83d10
JK
663 else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) {
664 /* #16d */
665 set_git_dir(gitdirenv);
666 free(gitfile);
667 return NULL;
668 }
b3f66fd3
NTND
669 else /* #2, #10 */
670 set_git_work_tree(".");
671
672 /* set_git_work_tree() must have been called by now */
673 worktree = get_git_work_tree();
674
675 /* both get_git_work_tree() and cwd are already normalized */
7333ed17 676 if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */
b3f66fd3
NTND
677 set_git_dir(gitdirenv);
678 free(gitfile);
e4e30347 679 return NULL;
b3f66fd3 680 }
e4e30347 681
7333ed17 682 offset = dir_inside_of(cwd->buf, worktree);
9b125da4 683 if (offset >= 0) { /* cwd inside worktree? */
e2a57aac 684 set_git_dir(real_path(gitdirenv));
b3f66fd3
NTND
685 if (chdir(worktree))
686 die_errno("Could not chdir to '%s'", worktree);
7333ed17 687 strbuf_addch(cwd, '/');
b3f66fd3 688 free(gitfile);
7333ed17 689 return cwd->buf + offset;
93a00542 690 }
b3f66fd3
NTND
691
692 /* cwd outside worktree */
693 set_git_dir(gitdirenv);
694 free(gitfile);
695 return NULL;
93a00542
JN
696}
697
9951d3b3 698static const char *setup_discovered_git_dir(const char *gitdir,
7333ed17 699 struct strbuf *cwd, int offset,
9951d3b3 700 int *nongit_ok)
98937bef 701{
9951d3b3
NTND
702 if (check_repository_format_gently(gitdir, nongit_ok))
703 return NULL;
98937bef 704
4868b2ea
JN
705 /* --work-tree is set without --git-dir; use discovered one */
706 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
7333ed17 707 if (offset != cwd->len && !is_absolute_path(gitdir))
ce83eadd 708 gitdir = real_pathdup(gitdir, 1);
7333ed17 709 if (chdir(cwd->buf))
4868b2ea 710 die_errno("Could not come back to cwd");
7333ed17 711 return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
4868b2ea
JN
712 }
713
9951d3b3
NTND
714 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
715 if (is_bare_repository_cfg > 0) {
7333ed17
RS
716 set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir));
717 if (chdir(cwd->buf))
9951d3b3 718 die_errno("Could not come back to cwd");
98937bef 719 return NULL;
9951d3b3 720 }
98937bef 721
9951d3b3
NTND
722 /* #0, #1, #5, #8, #9, #12, #13 */
723 set_git_work_tree(".");
724 if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
725 set_git_dir(gitdir);
98937bef 726 inside_git_dir = 0;
9951d3b3 727 inside_work_tree = 1;
7333ed17 728 if (offset == cwd->len)
98937bef
NTND
729 return NULL;
730
df380d58
JS
731 /* Make "offset" point past the '/' (already the case for root dirs) */
732 if (offset != offset_1st_component(cwd->buf))
733 offset++;
734 /* Add a '/' at the end */
7333ed17
RS
735 strbuf_addch(cwd, '/');
736 return cwd->buf + offset;
98937bef
NTND
737}
738
1cd8031b 739/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
7333ed17
RS
740static const char *setup_bare_git_dir(struct strbuf *cwd, int offset,
741 int *nongit_ok)
68698da5
JN
742{
743 int root_len;
744
1cd8031b
NTND
745 if (check_repository_format_gently(".", nongit_ok))
746 return NULL;
747
2cd83d10
JK
748 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
749
4868b2ea
JN
750 /* --work-tree is set without --git-dir; use discovered one */
751 if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
752 const char *gitdir;
753
7333ed17
RS
754 gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset);
755 if (chdir(cwd->buf))
4868b2ea 756 die_errno("Could not come back to cwd");
7333ed17 757 return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
4868b2ea
JN
758 }
759
68698da5 760 inside_git_dir = 1;
1cd8031b 761 inside_work_tree = 0;
7333ed17
RS
762 if (offset != cwd->len) {
763 if (chdir(cwd->buf))
8fc0ae80 764 die_errno("Cannot come back to cwd");
7333ed17
RS
765 root_len = offset_1st_component(cwd->buf);
766 strbuf_setlen(cwd, offset > root_len ? offset : root_len);
767 set_git_dir(cwd->buf);
337e51ce 768 }
1cd8031b 769 else
68698da5 770 set_git_dir(".");
68698da5
JN
771 return NULL;
772}
773
f161edeb
JN
774static const char *setup_nongit(const char *cwd, int *nongit_ok)
775{
776 if (!nongit_ok)
2ff30e67 777 die(_("Not a git repository (or any of the parent directories): %s"), DEFAULT_GIT_DIR_ENVIRONMENT);
f161edeb 778 if (chdir(cwd))
2ff30e67 779 die_errno(_("Cannot come back to cwd"));
f161edeb
JN
780 *nongit_ok = 1;
781 return NULL;
782}
783
2565b43b 784static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len)
60c98d1e
JN
785{
786 struct stat buf;
2565b43b
CB
787 if (stat(path, &buf)) {
788 die_errno("failed to stat '%*s%s%s'",
789 prefix_len,
60c98d1e
JN
790 prefix ? prefix : "",
791 prefix ? "/" : "", path);
2565b43b 792 }
60c98d1e
JN
793 return buf.st_dev;
794}
795
9e2326c7 796/*
1b77d83c
MH
797 * A "string_list_each_func_t" function that canonicalizes an entry
798 * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or
7ec30aaa
MH
799 * discards it if unusable. The presence of an empty entry in
800 * GIT_CEILING_DIRECTORIES turns off canonicalization for all
801 * subsequent entries.
9e2326c7 802 */
1b77d83c 803static int canonicalize_ceiling_entry(struct string_list_item *item,
7ec30aaa 804 void *cb_data)
9e2326c7 805{
7ec30aaa 806 int *empty_entry_found = cb_data;
1b77d83c 807 char *ceil = item->string;
9e2326c7 808
7ec30aaa
MH
809 if (!*ceil) {
810 *empty_entry_found = 1;
9e2326c7 811 return 0;
7ec30aaa 812 } else if (!is_absolute_path(ceil)) {
9e2326c7 813 return 0;
7ec30aaa
MH
814 } else if (*empty_entry_found) {
815 /* Keep entry but do not canonicalize it */
816 return 1;
817 } else {
ce83eadd 818 char *real_path = real_pathdup(ceil, 0);
4ac9006f 819 if (!real_path) {
7ec30aaa 820 return 0;
4ac9006f 821 }
7ec30aaa 822 free(item->string);
4ac9006f 823 item->string = real_path;
7ec30aaa
MH
824 return 1;
825 }
9e2326c7
MH
826}
827
ce9b8aab
JS
828enum discovery_result {
829 GIT_DIR_NONE = 0,
830 GIT_DIR_EXPLICIT,
831 GIT_DIR_DISCOVERED,
832 GIT_DIR_BARE,
833 /* these are errors */
834 GIT_DIR_HIT_CEILING = -1,
01017dce
JS
835 GIT_DIR_HIT_MOUNT_POINT = -2,
836 GIT_DIR_INVALID_GITFILE = -3
ce9b8aab
JS
837};
838
e90fdc39
JS
839/*
840 * We cannot decide in this function whether we are in the work tree or
841 * not, since the config can only be read _after_ this function was called.
ce9b8aab
JS
842 *
843 * Also, we avoid changing any global state (such as the current working
844 * directory) to allow early callers.
845 *
846 * The directory where the search should start needs to be passed in via the
847 * `dir` parameter; upon return, the `dir` buffer will contain the path of
848 * the directory where the search ended, and `gitdir` will contain the path of
849 * the discovered .git/ directory, if any. If `gitdir` is not absolute, it
850 * is relative to `dir` (i.e. *not* necessarily the cwd).
e90fdc39 851 */
ce9b8aab 852static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir,
01017dce
JS
853 struct strbuf *gitdir,
854 int die_on_error)
d288a700 855{
0454dd93 856 const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
31171d9e 857 struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
ce9b8aab
JS
858 const char *gitdirenv;
859 int ceil_offset = -1, min_offset = has_dos_drive_prefix(dir->buf) ? 3 : 1;
c7d1d1b1
RH
860 dev_t current_device = 0;
861 int one_filesystem = 1;
d288a700 862
e90fdc39
JS
863 /*
864 * If GIT_DIR is set explicitly, we're not going
865 * to do any discovery, but we still do repository
866 * validation.
867 */
ad1a382f 868 gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
ce9b8aab
JS
869 if (gitdirenv) {
870 strbuf_addstr(gitdir, gitdirenv);
871 return GIT_DIR_EXPLICIT;
872 }
d288a700 873
31171d9e 874 if (env_ceiling_dirs) {
7ec30aaa
MH
875 int empty_entry_found = 0;
876
31171d9e 877 string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1);
1b77d83c 878 filter_string_list(&ceiling_dirs, 0,
7ec30aaa 879 canonicalize_ceiling_entry, &empty_entry_found);
ce9b8aab 880 ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs);
31171d9e
MH
881 string_list_clear(&ceiling_dirs, 0);
882 }
883
ce9b8aab
JS
884 if (ceil_offset < 0)
885 ceil_offset = min_offset - 2;
d288a700 886
892c41b9 887 /*
ce9b8aab 888 * Test in the following order (relative to the dir):
b44ebb19 889 * - .git (file containing "gitdir: <path>")
e90fdc39
JS
890 * - .git/
891 * - ./ (bare)
b44ebb19 892 * - ../.git
e90fdc39
JS
893 * - ../.git/
894 * - ../ (bare)
895 * - ../../.git/
896 * etc.
892c41b9 897 */
cf87463e 898 one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
60c98d1e 899 if (one_filesystem)
ce9b8aab 900 current_device = get_device_or_die(dir->buf, NULL, 0);
e90fdc39 901 for (;;) {
01017dce 902 int offset = dir->len, error_code = 0;
ce9b8aab
JS
903
904 if (offset > min_offset)
905 strbuf_addch(dir, '/');
906 strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT);
01017dce
JS
907 gitdirenv = read_gitfile_gently(dir->buf, die_on_error ?
908 NULL : &error_code);
909 if (!gitdirenv) {
910 if (die_on_error ||
911 error_code == READ_GITFILE_ERR_NOT_A_FILE) {
5c4003ca 912 /* NEEDSWORK: fail if .git is not file nor dir */
01017dce
JS
913 if (is_git_directory(dir->buf))
914 gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
915 } else if (error_code != READ_GITFILE_ERR_STAT_FAILED)
916 return GIT_DIR_INVALID_GITFILE;
9951d3b3 917 }
ce9b8aab 918 strbuf_setlen(dir, offset);
9951d3b3 919 if (gitdirenv) {
ce9b8aab
JS
920 strbuf_addstr(gitdir, gitdirenv);
921 return GIT_DIR_DISCOVERED;
9951d3b3 922 }
9951d3b3 923
ce9b8aab
JS
924 if (is_git_directory(dir->buf)) {
925 strbuf_addstr(gitdir, ".");
926 return GIT_DIR_BARE;
502ffe34 927 }
9951d3b3 928
ce9b8aab
JS
929 if (offset <= min_offset)
930 return GIT_DIR_HIT_CEILING;
1cd8031b 931
ce9b8aab 932 while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset]))
6c1e6544 933 ; /* continue */
ce9b8aab
JS
934 if (offset <= ceil_offset)
935 return GIT_DIR_HIT_CEILING;
936
937 strbuf_setlen(dir, offset > min_offset ? offset : min_offset);
938 if (one_filesystem &&
939 current_device != get_device_or_die(dir->buf, NULL, offset))
940 return GIT_DIR_HIT_MOUNT_POINT;
892c41b9 941 }
d288a700 942}
5e7bfe25 943
16ac8b8d
JS
944const char *discover_git_directory(struct strbuf *gitdir)
945{
946 struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT;
947 size_t gitdir_offset = gitdir->len, cwd_len;
948 struct repository_format candidate;
949
950 if (strbuf_getcwd(&dir))
951 return NULL;
952
953 cwd_len = dir.len;
01017dce 954 if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) {
16ac8b8d
JS
955 strbuf_release(&dir);
956 return NULL;
957 }
958
959 /*
960 * The returned gitdir is relative to dir, and if dir does not reflect
961 * the current working directory, we simply make the gitdir absolute.
962 */
963 if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) {
964 /* Avoid a trailing "/." */
965 if (!strcmp(".", gitdir->buf + gitdir_offset))
966 strbuf_setlen(gitdir, gitdir_offset);
967 else
968 strbuf_addch(&dir, '/');
969 strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len);
970 }
971
972 strbuf_reset(&dir);
973 strbuf_addf(&dir, "%s/config", gitdir->buf + gitdir_offset);
974 read_repository_format(&candidate, dir.buf);
975 strbuf_release(&dir);
976
977 if (verify_repository_format(&candidate, &err) < 0) {
978 warning("ignoring git dir '%s': %s",
979 gitdir->buf + gitdir_offset, err.buf);
980 strbuf_release(&err);
981 return NULL;
982 }
983
984 return gitdir->buf + gitdir_offset;
985}
986
a60645f9
NTND
987const char *setup_git_directory_gently(int *nongit_ok)
988{
ce9b8aab
JS
989 static struct strbuf cwd = STRBUF_INIT;
990 struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT;
b58a68c1 991 const char *prefix, *env_prefix;
a60645f9 992
ce9b8aab
JS
993 /*
994 * We may have read an incomplete configuration before
995 * setting-up the git directory. If so, clear the cache so
996 * that the next queries to the configuration reload complete
997 * configuration (including the per-repo config file that we
998 * ignored previously).
999 */
1000 git_config_clear();
1001
1002 /*
1003 * Let's assume that we are in a git repository.
1004 * If it turns out later that we are somewhere else, the value will be
1005 * updated accordingly.
1006 */
1007 if (nongit_ok)
1008 *nongit_ok = 0;
1009
1010 if (strbuf_getcwd(&cwd))
1011 die_errno(_("Unable to read current working directory"));
1012 strbuf_addbuf(&dir, &cwd);
1013
01017dce 1014 switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) {
ce9b8aab
JS
1015 case GIT_DIR_NONE:
1016 prefix = NULL;
1017 break;
1018 case GIT_DIR_EXPLICIT:
1019 prefix = setup_explicit_git_dir(gitdir.buf, &cwd, nongit_ok);
1020 break;
1021 case GIT_DIR_DISCOVERED:
1022 if (dir.len < cwd.len && chdir(dir.buf))
1023 die(_("Cannot change to '%s'"), dir.buf);
1024 prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len,
1025 nongit_ok);
1026 break;
1027 case GIT_DIR_BARE:
1028 if (dir.len < cwd.len && chdir(dir.buf))
1029 die(_("Cannot change to '%s'"), dir.buf);
1030 prefix = setup_bare_git_dir(&cwd, dir.len, nongit_ok);
1031 break;
1032 case GIT_DIR_HIT_CEILING:
1033 prefix = setup_nongit(cwd.buf, nongit_ok);
1034 break;
1035 case GIT_DIR_HIT_MOUNT_POINT:
1036 if (nongit_ok) {
1037 *nongit_ok = 1;
1038 strbuf_release(&cwd);
1039 strbuf_release(&dir);
1040 return NULL;
1041 }
1042 die(_("Not a git repository (or any parent up to mount point %s)\n"
1043 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."),
1044 dir.buf);
1045 default:
1046 die("BUG: unhandled setup_git_directory_1() result");
1047 }
1048
3736c925 1049 env_prefix = getenv(GIT_TOPLEVEL_PREFIX_ENVIRONMENT);
b58a68c1
BW
1050 if (env_prefix)
1051 prefix = env_prefix;
1052
1f5d271f 1053 if (prefix)
a6f7f9a3 1054 setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1);
1f5d271f 1055 else
a6f7f9a3 1056 setenv(GIT_PREFIX_ENVIRONMENT, "", 1);
1f5d271f 1057
46c3cd44
JK
1058 startup_info->have_repository = !nongit_ok || !*nongit_ok;
1059 startup_info->prefix = prefix;
1060
ce9b8aab
JS
1061 strbuf_release(&dir);
1062 strbuf_release(&gitdir);
1063
a60645f9
NTND
1064 return prefix;
1065}
1066
94df2506
JH
1067int git_config_perm(const char *var, const char *value)
1068{
06cbe855
HO
1069 int i;
1070 char *endptr;
1071
1072 if (value == NULL)
1073 return PERM_GROUP;
1074
1075 if (!strcmp(value, "umask"))
1076 return PERM_UMASK;
1077 if (!strcmp(value, "group"))
1078 return PERM_GROUP;
1079 if (!strcmp(value, "all") ||
1080 !strcmp(value, "world") ||
1081 !strcmp(value, "everybody"))
1082 return PERM_EVERYBODY;
1083
1084 /* Parse octal numbers */
1085 i = strtol(value, &endptr, 8);
1086
1087 /* If not an octal number, maybe true/false? */
1088 if (*endptr != 0)
1089 return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK;
1090
1091 /*
1092 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
5a688fe4 1093 * a chmod value to restrict to.
06cbe855
HO
1094 */
1095 switch (i) {
1096 case PERM_UMASK: /* 0 */
1097 return PERM_UMASK;
1098 case OLD_PERM_GROUP: /* 1 */
1099 return PERM_GROUP;
1100 case OLD_PERM_EVERYBODY: /* 2 */
1101 return PERM_EVERYBODY;
94df2506 1102 }
06cbe855
HO
1103
1104 /* A filemode value was given: 0xxx */
1105
1106 if ((i & 0600) != 0600)
2ff30e67 1107 die(_("Problem with core.sharedRepository filemode value "
06cbe855 1108 "(0%.3o).\nThe owner of files must always have "
2ff30e67 1109 "read and write permissions."), i);
06cbe855
HO
1110
1111 /*
1112 * Mask filemode value. Others can not get write permission.
1113 * x flags for directories are handled separately.
1114 */
5a688fe4 1115 return -(i & 0666);
94df2506
JH
1116}
1117
4b0d1eeb 1118void check_repository_format(void)
ab9cb76f 1119{
f1c126bd
JK
1120 check_repository_format_gently(get_git_dir(), NULL);
1121 startup_info->have_repository = 1;
ab9cb76f
JH
1122}
1123
e1e5ec86
CB
1124/*
1125 * Returns the "prefix", a path to the current working directory
1126 * relative to the work tree root, or NULL, if the current working
1127 * directory is not a strict subdirectory of the work tree root. The
1128 * prefix always ends with a '/' character.
1129 */
5e7bfe25
JH
1130const char *setup_git_directory(void)
1131{
b3f66fd3 1132 return setup_git_directory_gently(NULL);
5e7bfe25 1133}
abc06822 1134
40d96325 1135const char *resolve_gitdir_gently(const char *suspect, int *return_error_code)
abc06822
FG
1136{
1137 if (is_git_directory(suspect))
1138 return suspect;
40d96325 1139 return read_gitfile_gently(suspect, return_error_code);
abc06822 1140}
1d999ddd
TR
1141
1142/* if any standard file descriptor is missing open it to /dev/null */
1143void sanitize_stdfds(void)
1144{
1145 int fd = open("/dev/null", O_RDWR, 0);
1146 while (fd != -1 && fd < 2)
1147 fd = dup(fd);
1148 if (fd == -1)
1149 die_errno("open /dev/null or dup failed");
1150 if (fd > 2)
1151 close(fd);
1152}
de0957ce
NTND
1153
1154int daemonize(void)
1155{
1156#ifdef NO_POSIX_GOODIES
1157 errno = ENOSYS;
1158 return -1;
1159#else
1160 switch (fork()) {
1161 case 0:
1162 break;
1163 case -1:
1164 die_errno("fork failed");
1165 default:
1166 exit(0);
1167 }
1168 if (setsid() == -1)
1169 die_errno("setsid failed");
1170 close(0);
1171 close(1);
1172 close(2);
1173 sanitize_stdfds();
1174 return 0;
1175#endif
1176}