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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
f6c2284a LP |
22 | #include <ctype.h> |
23 | #include <dirent.h> | |
60918275 | 24 | #include <errno.h> |
f6c2284a LP |
25 | #include <fcntl.h> |
26 | #include <glob.h> | |
27 | #include <grp.h> | |
28 | #include <langinfo.h> | |
20f56fdd | 29 | #include <libintl.h> |
f6c2284a LP |
30 | #include <limits.h> |
31 | #include <linux/magic.h> | |
257b0719 | 32 | #include <linux/oom.h> |
ef886c6a | 33 | #include <linux/sched.h> |
f6c2284a | 34 | #include <locale.h> |
0a6f50c0 | 35 | #include <poll.h> |
ef2f1067 | 36 | #include <pwd.h> |
f6c2284a LP |
37 | #include <sched.h> |
38 | #include <signal.h> | |
39 | #include <stdarg.h> | |
40 | #include <stdio.h> | |
41 | #include <stdlib.h> | |
42 | #include <string.h> | |
43 | #include <sys/file.h> | |
44 | #include <sys/ioctl.h> | |
87d2c1ff | 45 | #include <sys/mman.h> |
6d313367 | 46 | #include <sys/mount.h> |
6afc95b7 | 47 | #include <sys/personality.h> |
f6c2284a LP |
48 | #include <sys/prctl.h> |
49 | #include <sys/resource.h> | |
50 | #include <sys/stat.h> | |
abe4aa14 | 51 | #include <sys/statvfs.h> |
f6c2284a LP |
52 | #include <sys/time.h> |
53 | #include <sys/types.h> | |
54 | #include <sys/utsname.h> | |
55 | #include <sys/vfs.h> | |
56 | #include <sys/wait.h> | |
57 | #include <sys/xattr.h> | |
58 | #include <syslog.h> | |
59 | #include <unistd.h> | |
eef46c37 LP |
60 | |
61 | /* When we include libgen.h because we need dirname() we immediately | |
f6c2284a LP |
62 | * undefine basename() since libgen.h defines it as a macro to the |
63 | * POSIX version which is really broken. We prefer GNU basename(). */ | |
eef46c37 | 64 | #include <libgen.h> |
2b6bf07d | 65 | #undef basename |
60918275 | 66 | |
9bf3b535 LP |
67 | #ifdef HAVE_SYS_AUXV_H |
68 | #include <sys/auxv.h> | |
69 | #endif | |
70 | ||
f6c2284a LP |
71 | /* We include linux/fs.h as last of the system headers, as it |
72 | * otherwise conflicts with sys/mount.h. Yay, Linux is great! */ | |
73 | #include <linux/fs.h> | |
74 | ||
3f6fd1ba | 75 | #include "build.h" |
f6c2284a LP |
76 | #include "def.h" |
77 | #include "device-nodes.h" | |
78 | #include "env-util.h" | |
4f5dd394 | 79 | #include "escape.h" |
f6c2284a | 80 | #include "exit-status.h" |
3ffd4af2 | 81 | #include "fd-util.h" |
f6c2284a LP |
82 | #include "fileio.h" |
83 | #include "formats-util.h" | |
84 | #include "gunicode.h" | |
85 | #include "hashmap.h" | |
86 | #include "hostname-util.h" | |
1dccbe19 | 87 | #include "ioprio.h" |
a9f5d454 | 88 | #include "log.h" |
f6c2284a LP |
89 | #include "macro.h" |
90 | #include "missing.h" | |
c38dfac9 | 91 | #include "mkdir.h" |
e4e73a63 | 92 | #include "hexdecoct.h" |
6bedfcbb | 93 | #include "parse-util.h" |
9eb977db | 94 | #include "path-util.h" |
0b452006 | 95 | #include "process-util.h" |
3df3e884 | 96 | #include "random-util.h" |
24882e06 | 97 | #include "signal-util.h" |
f6c2284a | 98 | #include "sparse-endian.h" |
07630cea | 99 | #include "string-util.h" |
f6c2284a LP |
100 | #include "strv.h" |
101 | #include "terminal-util.h" | |
b1d4f8e1 | 102 | #include "user-util.h" |
f6c2284a | 103 | #include "utf8.h" |
4f5dd394 | 104 | #include "util.h" |
3ffd4af2 | 105 | #include "virt.h" |
56cf987f | 106 | |
012d7b42 ZJS |
107 | /* Put this test here for a lack of better place */ |
108 | assert_cc(EAGAIN == EWOULDBLOCK); | |
109 | ||
9a0e6896 LP |
110 | int saved_argc = 0; |
111 | char **saved_argv = NULL; | |
9086e840 | 112 | |
37f85e66 | 113 | size_t page_size(void) { |
ec202eae | 114 | static thread_local size_t pgsz = 0; |
37f85e66 | 115 | long r; |
116 | ||
87d2c1ff | 117 | if (_likely_(pgsz > 0)) |
37f85e66 | 118 | return pgsz; |
119 | ||
e67f47e5 LP |
120 | r = sysconf(_SC_PAGESIZE); |
121 | assert(r > 0); | |
37f85e66 | 122 | |
123 | pgsz = (size_t) r; | |
37f85e66 | 124 | return pgsz; |
125 | } | |
126 | ||
4b73a0c0 LP |
127 | int unlink_noerrno(const char *path) { |
128 | PROTECT_ERRNO; | |
129 | int r; | |
130 | ||
131 | r = unlink(path); | |
132 | if (r < 0) | |
133 | return -errno; | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
34ca941c LP |
138 | int fchmod_umask(int fd, mode_t m) { |
139 | mode_t u; | |
140 | int r; | |
141 | ||
142 | u = umask(0777); | |
143 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
144 | umask(u); | |
145 | ||
146 | return r; | |
147 | } | |
148 | ||
849958d1 | 149 | int readlinkat_malloc(int fd, const char *p, char **ret) { |
87f0e418 | 150 | size_t l = 100; |
2d2ebd6b | 151 | int r; |
87f0e418 LP |
152 | |
153 | assert(p); | |
2d2ebd6b | 154 | assert(ret); |
87f0e418 LP |
155 | |
156 | for (;;) { | |
157 | char *c; | |
158 | ssize_t n; | |
159 | ||
2d2ebd6b LP |
160 | c = new(char, l); |
161 | if (!c) | |
87f0e418 LP |
162 | return -ENOMEM; |
163 | ||
849958d1 | 164 | n = readlinkat(fd, p, c, l-1); |
2d2ebd6b LP |
165 | if (n < 0) { |
166 | r = -errno; | |
87f0e418 | 167 | free(c); |
2d2ebd6b | 168 | return r; |
87f0e418 LP |
169 | } |
170 | ||
171 | if ((size_t) n < l-1) { | |
172 | c[n] = 0; | |
2d2ebd6b | 173 | *ret = c; |
87f0e418 LP |
174 | return 0; |
175 | } | |
176 | ||
177 | free(c); | |
178 | l *= 2; | |
179 | } | |
180 | } | |
181 | ||
849958d1 LP |
182 | int readlink_malloc(const char *p, char **ret) { |
183 | return readlinkat_malloc(AT_FDCWD, p, ret); | |
184 | } | |
185 | ||
9a67bcf2 TG |
186 | int readlink_value(const char *p, char **ret) { |
187 | _cleanup_free_ char *link = NULL; | |
188 | char *value; | |
189 | int r; | |
190 | ||
191 | r = readlink_malloc(p, &link); | |
192 | if (r < 0) | |
193 | return r; | |
194 | ||
195 | value = basename(link); | |
196 | if (!value) | |
197 | return -ENOENT; | |
198 | ||
199 | value = strdup(value); | |
200 | if (!value) | |
201 | return -ENOMEM; | |
202 | ||
203 | *ret = value; | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
2c7108c4 | 208 | int readlink_and_make_absolute(const char *p, char **r) { |
1058cbf2 ZJS |
209 | _cleanup_free_ char *target = NULL; |
210 | char *k; | |
2c7108c4 LP |
211 | int j; |
212 | ||
213 | assert(p); | |
214 | assert(r); | |
215 | ||
1058cbf2 ZJS |
216 | j = readlink_malloc(p, &target); |
217 | if (j < 0) | |
2c7108c4 LP |
218 | return j; |
219 | ||
220 | k = file_in_same_dir(p, target); | |
2c7108c4 LP |
221 | if (!k) |
222 | return -ENOMEM; | |
223 | ||
224 | *r = k; | |
225 | return 0; | |
226 | } | |
227 | ||
83096483 LP |
228 | int readlink_and_canonicalize(const char *p, char **r) { |
229 | char *t, *s; | |
230 | int j; | |
231 | ||
232 | assert(p); | |
233 | assert(r); | |
234 | ||
235 | j = readlink_and_make_absolute(p, &t); | |
236 | if (j < 0) | |
237 | return j; | |
238 | ||
239 | s = canonicalize_file_name(t); | |
240 | if (s) { | |
241 | free(t); | |
242 | *r = s; | |
243 | } else | |
244 | *r = t; | |
245 | ||
246 | path_kill_slashes(*r); | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
4a72ff34 | 251 | char *file_in_same_dir(const char *path, const char *filename) { |
ebd93cb6 | 252 | char *e, *ret; |
4a72ff34 LP |
253 | size_t k; |
254 | ||
255 | assert(path); | |
256 | assert(filename); | |
257 | ||
258 | /* This removes the last component of path and appends | |
259 | * filename, unless the latter is absolute anyway or the | |
260 | * former isn't */ | |
261 | ||
262 | if (path_is_absolute(filename)) | |
263 | return strdup(filename); | |
264 | ||
ebd93cb6 LP |
265 | e = strrchr(path, '/'); |
266 | if (!e) | |
4a72ff34 LP |
267 | return strdup(filename); |
268 | ||
269 | k = strlen(filename); | |
ebd93cb6 LP |
270 | ret = new(char, (e + 1 - path) + k + 1); |
271 | if (!ret) | |
4a72ff34 LP |
272 | return NULL; |
273 | ||
ebd93cb6 LP |
274 | memcpy(mempcpy(ret, path, e + 1 - path), filename, k + 1); |
275 | return ret; | |
4a72ff34 | 276 | } |
fb624d04 | 277 | |
c32dd69b LP |
278 | int rmdir_parents(const char *path, const char *stop) { |
279 | size_t l; | |
280 | int r = 0; | |
281 | ||
282 | assert(path); | |
283 | assert(stop); | |
284 | ||
285 | l = strlen(path); | |
286 | ||
287 | /* Skip trailing slashes */ | |
288 | while (l > 0 && path[l-1] == '/') | |
289 | l--; | |
290 | ||
291 | while (l > 0) { | |
292 | char *t; | |
293 | ||
294 | /* Skip last component */ | |
295 | while (l > 0 && path[l-1] != '/') | |
296 | l--; | |
297 | ||
298 | /* Skip trailing slashes */ | |
299 | while (l > 0 && path[l-1] == '/') | |
300 | l--; | |
301 | ||
302 | if (l <= 0) | |
303 | break; | |
304 | ||
305 | if (!(t = strndup(path, l))) | |
306 | return -ENOMEM; | |
307 | ||
308 | if (path_startswith(stop, t)) { | |
309 | free(t); | |
310 | return 0; | |
311 | } | |
312 | ||
313 | r = rmdir(t); | |
314 | free(t); | |
315 | ||
316 | if (r < 0) | |
317 | if (errno != ENOENT) | |
318 | return -errno; | |
319 | } | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
a34bf9db | 324 | _pure_ static bool hidden_file_allow_backup(const char *filename) { |
c85dc17b LP |
325 | assert(filename); |
326 | ||
327 | return | |
328 | filename[0] == '.' || | |
6c78be3c | 329 | streq(filename, "lost+found") || |
e472d476 LP |
330 | streq(filename, "aquota.user") || |
331 | streq(filename, "aquota.group") || | |
c85dc17b LP |
332 | endswith(filename, ".rpmnew") || |
333 | endswith(filename, ".rpmsave") || | |
334 | endswith(filename, ".rpmorig") || | |
335 | endswith(filename, ".dpkg-old") || | |
336 | endswith(filename, ".dpkg-new") || | |
0cdfd26e | 337 | endswith(filename, ".dpkg-tmp") || |
c7088e49 MP |
338 | endswith(filename, ".dpkg-dist") || |
339 | endswith(filename, ".dpkg-bak") || | |
340 | endswith(filename, ".dpkg-backup") || | |
341 | endswith(filename, ".dpkg-remove") || | |
c85dc17b LP |
342 | endswith(filename, ".swp"); |
343 | } | |
344 | ||
a34bf9db | 345 | bool hidden_file(const char *filename) { |
a228a22f LP |
346 | assert(filename); |
347 | ||
348 | if (endswith(filename, "~")) | |
93f1a063 | 349 | return true; |
a228a22f | 350 | |
a34bf9db | 351 | return hidden_file_allow_backup(filename); |
a228a22f LP |
352 | } |
353 | ||
42856c10 | 354 | bool fstype_is_network(const char *fstype) { |
a05f97b3 | 355 | static const char table[] = |
ba89821c | 356 | "afs\0" |
a05f97b3 LP |
357 | "cifs\0" |
358 | "smbfs\0" | |
da92ca5e | 359 | "sshfs\0" |
a05f97b3 | 360 | "ncpfs\0" |
dac70dc7 | 361 | "ncp\0" |
a05f97b3 LP |
362 | "nfs\0" |
363 | "nfs4\0" | |
364 | "gfs\0" | |
67608cad LP |
365 | "gfs2\0" |
366 | "glusterfs\0"; | |
367 | ||
368 | const char *x; | |
369 | ||
370 | x = startswith(fstype, "fuse."); | |
371 | if (x) | |
372 | fstype = x; | |
42856c10 | 373 | |
a05f97b3 | 374 | return nulstr_contains(table, fstype); |
42856c10 LP |
375 | } |
376 | ||
8407a5d0 LP |
377 | bool is_device_path(const char *path) { |
378 | ||
379 | /* Returns true on paths that refer to a device, either in | |
380 | * sysfs or in /dev */ | |
381 | ||
382 | return | |
383 | path_startswith(path, "/dev/") || | |
384 | path_startswith(path, "/sys/"); | |
385 | } | |
386 | ||
01f78473 | 387 | int dir_is_empty(const char *path) { |
a05f97b3 | 388 | _cleanup_closedir_ DIR *d; |
ac7edd91 | 389 | struct dirent *de; |
01f78473 | 390 | |
a05f97b3 LP |
391 | d = opendir(path); |
392 | if (!d) | |
01f78473 LP |
393 | return -errno; |
394 | ||
ac7edd91 LP |
395 | FOREACH_DIRENT(de, d, return -errno) |
396 | return 0; | |
01f78473 | 397 | |
ac7edd91 | 398 | return 1; |
01f78473 LP |
399 | } |
400 | ||
5b6319dc LP |
401 | void rename_process(const char name[8]) { |
402 | assert(name); | |
403 | ||
5d6b1584 LP |
404 | /* This is a like a poor man's setproctitle(). It changes the |
405 | * comm field, argv[0], and also the glibc's internally used | |
406 | * name of the process. For the first one a limit of 16 chars | |
407 | * applies, to the second one usually one of 10 (i.e. length | |
408 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
409 | * "systemd"). If you pass a longer string it will be | |
410 | * truncated */ | |
5b6319dc | 411 | |
5d6b1584 | 412 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
413 | |
414 | if (program_invocation_name) | |
415 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
416 | |
417 | if (saved_argc > 0) { | |
418 | int i; | |
419 | ||
420 | if (saved_argv[0]) | |
421 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
422 | ||
423 | for (i = 1; i < saved_argc; i++) { | |
424 | if (!saved_argv[i]) | |
425 | break; | |
426 | ||
29804cc1 | 427 | memzero(saved_argv[i], strlen(saved_argv[i])); |
9a0e6896 LP |
428 | } |
429 | } | |
5b6319dc LP |
430 | } |
431 | ||
d1678248 | 432 | bool is_fs_type(const struct statfs *s, statfs_f_type_t magic_value) { |
943aad8c | 433 | assert(s); |
d1678248 ILG |
434 | assert_cc(sizeof(statfs_f_type_t) >= sizeof(s->f_type)); |
435 | ||
436 | return F_TYPE_EQUAL(s->f_type, magic_value); | |
437 | } | |
438 | ||
439 | int fd_check_fstype(int fd, statfs_f_type_t magic_value) { | |
440 | struct statfs s; | |
441 | ||
442 | if (fstatfs(fd, &s) < 0) | |
443 | return -errno; | |
73020ab2 | 444 | |
d1678248 ILG |
445 | return is_fs_type(&s, magic_value); |
446 | } | |
447 | ||
448 | int path_check_fstype(const char *path, statfs_f_type_t magic_value) { | |
449 | _cleanup_close_ int fd = -1; | |
450 | ||
451 | fd = open(path, O_RDONLY); | |
452 | if (fd < 0) | |
453 | return -errno; | |
454 | ||
455 | return fd_check_fstype(fd, magic_value); | |
456 | } | |
457 | ||
458 | bool is_temporary_fs(const struct statfs *s) { | |
459 | return is_fs_type(s, TMPFS_MAGIC) || | |
460 | is_fs_type(s, RAMFS_MAGIC); | |
943aad8c ZJS |
461 | } |
462 | ||
c6878637 | 463 | int fd_is_temporary_fs(int fd) { |
979ef53a DR |
464 | struct statfs s; |
465 | ||
466 | if (fstatfs(fd, &s) < 0) | |
467 | return -errno; | |
468 | ||
469 | return is_temporary_fs(&s); | |
470 | } | |
471 | ||
8c6db833 LP |
472 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
473 | assert(path); | |
474 | ||
475 | /* Under the assumption that we are running privileged we | |
476 | * first change the access mode and only then hand out | |
477 | * ownership to avoid a window where access is too open. */ | |
478 | ||
fed1e721 | 479 | if (mode != MODE_INVALID) |
8d53b453 LP |
480 | if (chmod(path, mode) < 0) |
481 | return -errno; | |
8c6db833 | 482 | |
fed1e721 | 483 | if (uid != UID_INVALID || gid != GID_INVALID) |
8d53b453 LP |
484 | if (chown(path, uid, gid) < 0) |
485 | return -errno; | |
8c6db833 LP |
486 | |
487 | return 0; | |
ef2f1067 LP |
488 | } |
489 | ||
f4b47811 LP |
490 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
491 | assert(fd >= 0); | |
492 | ||
493 | /* Under the assumption that we are running privileged we | |
494 | * first change the access mode and only then hand out | |
495 | * ownership to avoid a window where access is too open. */ | |
496 | ||
fed1e721 | 497 | if (mode != MODE_INVALID) |
9588bc32 LP |
498 | if (fchmod(fd, mode) < 0) |
499 | return -errno; | |
f4b47811 | 500 | |
fed1e721 | 501 | if (uid != UID_INVALID || gid != GID_INVALID) |
9588bc32 LP |
502 | if (fchown(fd, uid, gid) < 0) |
503 | return -errno; | |
f4b47811 LP |
504 | |
505 | return 0; | |
506 | } | |
507 | ||
9d9951a4 HH |
508 | int files_same(const char *filea, const char *fileb) { |
509 | struct stat a, b; | |
b4f10a5e | 510 | |
9d9951a4 | 511 | if (stat(filea, &a) < 0) |
b4f10a5e LP |
512 | return -errno; |
513 | ||
9d9951a4 | 514 | if (stat(fileb, &b) < 0) |
b4f10a5e LP |
515 | return -errno; |
516 | ||
9d9951a4 HH |
517 | return a.st_dev == b.st_dev && |
518 | a.st_ino == b.st_ino; | |
519 | } | |
520 | ||
521 | int running_in_chroot(void) { | |
522 | int ret; | |
523 | ||
524 | ret = files_same("/proc/1/root", "/"); | |
525 | if (ret < 0) | |
526 | return ret; | |
527 | ||
528 | return ret == 0; | |
b4f10a5e LP |
529 | } |
530 | ||
c38dfac9 | 531 | int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode) { |
03e334a1 | 532 | _cleanup_close_ int fd; |
c38dfac9 | 533 | int r; |
f6144808 LP |
534 | |
535 | assert(path); | |
536 | ||
c38dfac9 KS |
537 | if (parents) |
538 | mkdir_parents(path, 0755); | |
73836c5c | 539 | |
c38dfac9 | 540 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, mode > 0 ? mode : 0644); |
73836c5c | 541 | if (fd < 0) |
f6144808 LP |
542 | return -errno; |
543 | ||
c38dfac9 KS |
544 | if (mode > 0) { |
545 | r = fchmod(fd, mode); | |
546 | if (r < 0) | |
547 | return -errno; | |
548 | } | |
549 | ||
fed1e721 | 550 | if (uid != UID_INVALID || gid != GID_INVALID) { |
c38dfac9 KS |
551 | r = fchown(fd, uid, gid); |
552 | if (r < 0) | |
553 | return -errno; | |
554 | } | |
555 | ||
3a43da28 | 556 | if (stamp != USEC_INFINITY) { |
c38dfac9 KS |
557 | struct timespec ts[2]; |
558 | ||
559 | timespec_store(&ts[0], stamp); | |
359efc59 | 560 | ts[1] = ts[0]; |
c38dfac9 KS |
561 | r = futimens(fd, ts); |
562 | } else | |
563 | r = futimens(fd, NULL); | |
564 | if (r < 0) | |
565 | return -errno; | |
566 | ||
f6144808 LP |
567 | return 0; |
568 | } | |
afea26ad | 569 | |
c38dfac9 | 570 | int touch(const char *path) { |
fed1e721 | 571 | return touch_file(path, false, USEC_INFINITY, UID_INVALID, GID_INVALID, 0); |
c38dfac9 KS |
572 | } |
573 | ||
919ce0b7 | 574 | noreturn void freeze(void) { |
720ce21d LP |
575 | |
576 | /* Make sure nobody waits for us on a socket anymore */ | |
577 | close_all_fds(NULL, 0); | |
578 | ||
c29597a1 LP |
579 | sync(); |
580 | ||
3c14d26c LP |
581 | for (;;) |
582 | pause(); | |
583 | } | |
584 | ||
00dc5d76 LP |
585 | bool null_or_empty(struct stat *st) { |
586 | assert(st); | |
587 | ||
588 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
589 | return true; | |
590 | ||
c8f26f42 | 591 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
592 | return true; |
593 | ||
594 | return false; | |
595 | } | |
596 | ||
83096483 LP |
597 | int null_or_empty_path(const char *fn) { |
598 | struct stat st; | |
599 | ||
600 | assert(fn); | |
601 | ||
602 | if (stat(fn, &st) < 0) | |
603 | return -errno; | |
604 | ||
605 | return null_or_empty(&st); | |
606 | } | |
607 | ||
ed88bcfb ZJS |
608 | int null_or_empty_fd(int fd) { |
609 | struct stat st; | |
610 | ||
611 | assert(fd >= 0); | |
612 | ||
613 | if (fstat(fd, &st) < 0) | |
614 | return -errno; | |
615 | ||
616 | return null_or_empty(&st); | |
617 | } | |
618 | ||
87d2c1ff | 619 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
620 | assert(de); |
621 | ||
a34bf9db | 622 | if (hidden_file(de->d_name)) |
fb19a739 LP |
623 | return false; |
624 | ||
625 | if (de->d_type != DT_REG && | |
626 | de->d_type != DT_LNK && | |
627 | de->d_type != DT_UNKNOWN) | |
628 | return false; | |
629 | ||
630 | return true; | |
631 | } | |
632 | ||
87d2c1ff LP |
633 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
634 | assert(de); | |
635 | ||
a228a22f LP |
636 | if (de->d_type != DT_REG && |
637 | de->d_type != DT_LNK && | |
638 | de->d_type != DT_UNKNOWN) | |
639 | return false; | |
640 | ||
a34bf9db | 641 | if (hidden_file_allow_backup(de->d_name)) |
87d2c1ff LP |
642 | return false; |
643 | ||
644 | return endswith(de->d_name, suffix); | |
645 | } | |
646 | ||
e801700e | 647 | static int do_execute(char **directories, usec_t timeout, char *argv[]) { |
49681057 | 648 | _cleanup_hashmap_free_free_ Hashmap *pids = NULL; |
e801700e ZJS |
649 | _cleanup_set_free_free_ Set *seen = NULL; |
650 | char **directory; | |
83cc030f | 651 | |
49681057 ZJS |
652 | /* We fork this all off from a child process so that we can |
653 | * somewhat cleanly make use of SIGALRM to set a time limit */ | |
83cc030f | 654 | |
ce30c8dc LP |
655 | (void) reset_all_signal_handlers(); |
656 | (void) reset_signal_mask(); | |
83cc030f | 657 | |
49681057 | 658 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 659 | |
49681057 ZJS |
660 | pids = hashmap_new(NULL); |
661 | if (!pids) | |
662 | return log_oom(); | |
83cc030f | 663 | |
e801700e ZJS |
664 | seen = set_new(&string_hash_ops); |
665 | if (!seen) | |
666 | return log_oom(); | |
83cc030f | 667 | |
e801700e ZJS |
668 | STRV_FOREACH(directory, directories) { |
669 | _cleanup_closedir_ DIR *d; | |
670 | struct dirent *de; | |
83cc030f | 671 | |
e801700e ZJS |
672 | d = opendir(*directory); |
673 | if (!d) { | |
674 | if (errno == ENOENT) | |
675 | continue; | |
83cc030f | 676 | |
e801700e ZJS |
677 | return log_error_errno(errno, "Failed to open directory %s: %m", *directory); |
678 | } | |
83cc030f | 679 | |
e801700e ZJS |
680 | FOREACH_DIRENT(de, d, break) { |
681 | _cleanup_free_ char *path = NULL; | |
682 | pid_t pid; | |
683 | int r; | |
684 | ||
685 | if (!dirent_is_file(de)) | |
686 | continue; | |
83cc030f | 687 | |
e801700e ZJS |
688 | if (set_contains(seen, de->d_name)) { |
689 | log_debug("%1$s/%2$s skipped (%2$s was already seen).", *directory, de->d_name); | |
690 | continue; | |
691 | } | |
692 | ||
693 | r = set_put_strdup(seen, de->d_name); | |
694 | if (r < 0) | |
695 | return log_oom(); | |
696 | ||
697 | path = strjoin(*directory, "/", de->d_name, NULL); | |
698 | if (!path) | |
699 | return log_oom(); | |
700 | ||
701 | if (null_or_empty_path(path)) { | |
702 | log_debug("%s is empty (a mask).", path); | |
703 | continue; | |
7034e9db | 704 | } |
83cc030f | 705 | |
e801700e ZJS |
706 | pid = fork(); |
707 | if (pid < 0) { | |
708 | log_error_errno(errno, "Failed to fork: %m"); | |
709 | continue; | |
710 | } else if (pid == 0) { | |
711 | char *_argv[2]; | |
83cc030f | 712 | |
e801700e | 713 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 714 | |
e801700e ZJS |
715 | if (!argv) { |
716 | _argv[0] = path; | |
717 | _argv[1] = NULL; | |
718 | argv = _argv; | |
719 | } else | |
720 | argv[0] = path; | |
721 | ||
722 | execv(path, argv); | |
723 | return log_error_errno(errno, "Failed to execute %s: %m", path); | |
724 | } | |
725 | ||
726 | log_debug("Spawned %s as " PID_FMT ".", path, pid); | |
83cc030f | 727 | |
e801700e ZJS |
728 | r = hashmap_put(pids, UINT_TO_PTR(pid), path); |
729 | if (r < 0) | |
730 | return log_oom(); | |
731 | path = NULL; | |
732 | } | |
49681057 | 733 | } |
83cc030f | 734 | |
49681057 ZJS |
735 | /* Abort execution of this process after the timout. We simply |
736 | * rely on SIGALRM as default action terminating the process, | |
737 | * and turn on alarm(). */ | |
83cc030f | 738 | |
49681057 ZJS |
739 | if (timeout != USEC_INFINITY) |
740 | alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC); | |
83cc030f | 741 | |
49681057 ZJS |
742 | while (!hashmap_isempty(pids)) { |
743 | _cleanup_free_ char *path = NULL; | |
744 | pid_t pid; | |
aa62a893 | 745 | |
49681057 ZJS |
746 | pid = PTR_TO_UINT(hashmap_first_key(pids)); |
747 | assert(pid > 0); | |
83cc030f | 748 | |
49681057 ZJS |
749 | path = hashmap_remove(pids, UINT_TO_PTR(pid)); |
750 | assert(path); | |
aa62a893 | 751 | |
49681057 ZJS |
752 | wait_for_terminate_and_warn(path, pid, true); |
753 | } | |
aa62a893 | 754 | |
49681057 ZJS |
755 | return 0; |
756 | } | |
aa62a893 | 757 | |
e801700e | 758 | void execute_directories(const char* const* directories, usec_t timeout, char *argv[]) { |
49681057 ZJS |
759 | pid_t executor_pid; |
760 | int r; | |
e801700e ZJS |
761 | char *name; |
762 | char **dirs = (char**) directories; | |
763 | ||
764 | assert(!strv_isempty(dirs)); | |
83cc030f | 765 | |
e801700e ZJS |
766 | name = basename(dirs[0]); |
767 | assert(!isempty(name)); | |
aa62a893 | 768 | |
e801700e ZJS |
769 | /* Executes all binaries in the directories in parallel and waits |
770 | * for them to finish. Optionally a timeout is applied. If a file | |
771 | * with the same name exists in more than one directory, the | |
772 | * earliest one wins. */ | |
83cc030f | 773 | |
49681057 ZJS |
774 | executor_pid = fork(); |
775 | if (executor_pid < 0) { | |
776 | log_error_errno(errno, "Failed to fork: %m"); | |
777 | return; | |
778 | ||
779 | } else if (executor_pid == 0) { | |
e801700e | 780 | r = do_execute(dirs, timeout, argv); |
49681057 | 781 | _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS); |
aa62a893 | 782 | } |
83cc030f | 783 | |
e801700e | 784 | wait_for_terminate_and_warn(name, executor_pid, true); |
83cc030f LP |
785 | } |
786 | ||
a88c8750 TG |
787 | bool plymouth_running(void) { |
788 | return access("/run/plymouth/pid", F_OK) >= 0; | |
789 | } | |
790 | ||
424a19f8 | 791 | int symlink_atomic(const char *from, const char *to) { |
2e78fa79 | 792 | _cleanup_free_ char *t = NULL; |
ae6c3cc0 | 793 | int r; |
34ca941c LP |
794 | |
795 | assert(from); | |
796 | assert(to); | |
797 | ||
14bcf25c | 798 | r = tempfn_random(to, NULL, &t); |
ae6c3cc0 LP |
799 | if (r < 0) |
800 | return r; | |
34ca941c | 801 | |
424a19f8 LP |
802 | if (symlink(from, t) < 0) |
803 | return -errno; | |
34ca941c LP |
804 | |
805 | if (rename(t, to) < 0) { | |
2e78fa79 LP |
806 | unlink_noerrno(t); |
807 | return -errno; | |
34ca941c LP |
808 | } |
809 | ||
424a19f8 | 810 | return 0; |
34ca941c LP |
811 | } |
812 | ||
875e1014 ILG |
813 | int symlink_idempotent(const char *from, const char *to) { |
814 | _cleanup_free_ char *p = NULL; | |
815 | int r; | |
816 | ||
817 | assert(from); | |
818 | assert(to); | |
819 | ||
820 | if (symlink(from, to) < 0) { | |
821 | if (errno != EEXIST) | |
822 | return -errno; | |
823 | ||
824 | r = readlink_malloc(to, &p); | |
825 | if (r < 0) | |
826 | return r; | |
827 | ||
828 | if (!streq(p, from)) | |
829 | return -EINVAL; | |
830 | } | |
831 | ||
832 | return 0; | |
833 | } | |
834 | ||
1554afae LP |
835 | int mknod_atomic(const char *path, mode_t mode, dev_t dev) { |
836 | _cleanup_free_ char *t = NULL; | |
ae6c3cc0 | 837 | int r; |
1554afae LP |
838 | |
839 | assert(path); | |
840 | ||
14bcf25c | 841 | r = tempfn_random(path, NULL, &t); |
ae6c3cc0 LP |
842 | if (r < 0) |
843 | return r; | |
1554afae LP |
844 | |
845 | if (mknod(t, mode, dev) < 0) | |
846 | return -errno; | |
847 | ||
848 | if (rename(t, path) < 0) { | |
849 | unlink_noerrno(t); | |
850 | return -errno; | |
851 | } | |
852 | ||
853 | return 0; | |
854 | } | |
855 | ||
856 | int mkfifo_atomic(const char *path, mode_t mode) { | |
857 | _cleanup_free_ char *t = NULL; | |
ae6c3cc0 | 858 | int r; |
1554afae LP |
859 | |
860 | assert(path); | |
861 | ||
14bcf25c | 862 | r = tempfn_random(path, NULL, &t); |
ae6c3cc0 LP |
863 | if (r < 0) |
864 | return r; | |
1554afae LP |
865 | |
866 | if (mkfifo(t, mode) < 0) | |
867 | return -errno; | |
868 | ||
869 | if (rename(t, path) < 0) { | |
870 | unlink_noerrno(t); | |
871 | return -errno; | |
872 | } | |
873 | ||
874 | return 0; | |
875 | } | |
876 | ||
4d6d6518 LP |
877 | bool display_is_local(const char *display) { |
878 | assert(display); | |
879 | ||
880 | return | |
881 | display[0] == ':' && | |
882 | display[1] >= '0' && | |
883 | display[1] <= '9'; | |
884 | } | |
885 | ||
886 | int socket_from_display(const char *display, char **path) { | |
887 | size_t k; | |
888 | char *f, *c; | |
889 | ||
890 | assert(display); | |
891 | assert(path); | |
892 | ||
893 | if (!display_is_local(display)) | |
894 | return -EINVAL; | |
895 | ||
896 | k = strspn(display+1, "0123456789"); | |
897 | ||
f8294e41 | 898 | f = new(char, strlen("/tmp/.X11-unix/X") + k + 1); |
4d6d6518 LP |
899 | if (!f) |
900 | return -ENOMEM; | |
901 | ||
902 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
903 | memcpy(c, display+1, k); | |
904 | c[k] = 0; | |
905 | ||
906 | *path = f; | |
907 | ||
908 | return 0; | |
909 | } | |
910 | ||
8092a428 | 911 | int glob_exists(const char *path) { |
7fd1b19b | 912 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 913 | int k; |
8092a428 LP |
914 | |
915 | assert(path); | |
916 | ||
8092a428 LP |
917 | errno = 0; |
918 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
919 | ||
920 | if (k == GLOB_NOMATCH) | |
8d98da3f | 921 | return 0; |
8092a428 | 922 | else if (k == GLOB_NOSPACE) |
8d98da3f | 923 | return -ENOMEM; |
8092a428 | 924 | else if (k == 0) |
8d98da3f | 925 | return !strv_isempty(g.gl_pathv); |
8092a428 | 926 | else |
8d98da3f ZJS |
927 | return errno ? -errno : -EIO; |
928 | } | |
8092a428 | 929 | |
8d98da3f ZJS |
930 | int glob_extend(char ***strv, const char *path) { |
931 | _cleanup_globfree_ glob_t g = {}; | |
932 | int k; | |
933 | char **p; | |
934 | ||
935 | errno = 0; | |
a8ccacf5 | 936 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
937 | |
938 | if (k == GLOB_NOMATCH) | |
939 | return -ENOENT; | |
940 | else if (k == GLOB_NOSPACE) | |
941 | return -ENOMEM; | |
942 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
943 | return errno ? -errno : -EIO; | |
944 | ||
945 | STRV_FOREACH(p, g.gl_pathv) { | |
946 | k = strv_extend(strv, *p); | |
947 | if (k < 0) | |
948 | break; | |
949 | } | |
950 | ||
951 | return k; | |
8092a428 LP |
952 | } |
953 | ||
83096483 LP |
954 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
955 | struct stat st; | |
956 | ||
957 | assert(d); | |
958 | assert(de); | |
959 | ||
960 | if (de->d_type != DT_UNKNOWN) | |
961 | return 0; | |
962 | ||
963 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
964 | return -errno; | |
965 | ||
966 | de->d_type = | |
967 | S_ISREG(st.st_mode) ? DT_REG : | |
968 | S_ISDIR(st.st_mode) ? DT_DIR : | |
969 | S_ISLNK(st.st_mode) ? DT_LNK : | |
970 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
971 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
972 | S_ISCHR(st.st_mode) ? DT_CHR : | |
973 | S_ISBLK(st.st_mode) ? DT_BLK : | |
974 | DT_UNKNOWN; | |
975 | ||
976 | return 0; | |
977 | } | |
978 | ||
034a2a52 | 979 | int get_files_in_directory(const char *path, char ***list) { |
893fa014 ZJS |
980 | _cleanup_closedir_ DIR *d = NULL; |
981 | size_t bufsize = 0, n = 0; | |
982 | _cleanup_strv_free_ char **l = NULL; | |
034a2a52 LP |
983 | |
984 | assert(path); | |
d60ef526 LP |
985 | |
986 | /* Returns all files in a directory in *list, and the number | |
987 | * of files as return value. If list is NULL returns only the | |
893fa014 | 988 | * number. */ |
034a2a52 LP |
989 | |
990 | d = opendir(path); | |
8ea913b2 LP |
991 | if (!d) |
992 | return -errno; | |
993 | ||
034a2a52 | 994 | for (;;) { |
7d5e9c0f | 995 | struct dirent *de; |
034a2a52 | 996 | |
3fd11280 FW |
997 | errno = 0; |
998 | de = readdir(d); | |
999 | if (!de && errno != 0) | |
1000 | return -errno; | |
034a2a52 LP |
1001 | if (!de) |
1002 | break; | |
1003 | ||
1004 | dirent_ensure_type(d, de); | |
1005 | ||
1006 | if (!dirent_is_file(de)) | |
1007 | continue; | |
1008 | ||
d60ef526 | 1009 | if (list) { |
893fa014 ZJS |
1010 | /* one extra slot is needed for the terminating NULL */ |
1011 | if (!GREEDY_REALLOC(l, bufsize, n + 2)) | |
1012 | return -ENOMEM; | |
034a2a52 | 1013 | |
893fa014 ZJS |
1014 | l[n] = strdup(de->d_name); |
1015 | if (!l[n]) | |
1016 | return -ENOMEM; | |
034a2a52 | 1017 | |
893fa014 | 1018 | l[++n] = NULL; |
d60ef526 | 1019 | } else |
893fa014 | 1020 | n++; |
034a2a52 LP |
1021 | } |
1022 | ||
893fa014 ZJS |
1023 | if (list) { |
1024 | *list = l; | |
1025 | l = NULL; /* avoid freeing */ | |
1026 | } | |
034a2a52 | 1027 | |
893fa014 | 1028 | return n; |
034a2a52 LP |
1029 | } |
1030 | ||
b636465b | 1031 | bool is_main_thread(void) { |
ec202eae | 1032 | static thread_local int cached = 0; |
b636465b LP |
1033 | |
1034 | if (_unlikely_(cached == 0)) | |
1035 | cached = getpid() == gettid() ? 1 : -1; | |
1036 | ||
1037 | return cached > 0; | |
1038 | } | |
1039 | ||
94959f0f LP |
1040 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
1041 | char *p, *s; | |
1042 | int r; | |
1043 | unsigned n, m; | |
1044 | ||
1045 | assert(ret); | |
1046 | ||
1047 | /* If it has a queue this is good enough for us */ | |
1048 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
1049 | return -ENOMEM; | |
1050 | ||
1051 | r = access(p, F_OK); | |
1052 | free(p); | |
1053 | ||
1054 | if (r >= 0) { | |
1055 | *ret = d; | |
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | /* If it is a partition find the originating device */ | |
1060 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
1061 | return -ENOMEM; | |
1062 | ||
1063 | r = access(p, F_OK); | |
1064 | free(p); | |
1065 | ||
1066 | if (r < 0) | |
1067 | return -ENOENT; | |
1068 | ||
1069 | /* Get parent dev_t */ | |
1070 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
1071 | return -ENOMEM; | |
1072 | ||
1073 | r = read_one_line_file(p, &s); | |
1074 | free(p); | |
1075 | ||
1076 | if (r < 0) | |
1077 | return r; | |
1078 | ||
1079 | r = sscanf(s, "%u:%u", &m, &n); | |
1080 | free(s); | |
1081 | ||
1082 | if (r != 2) | |
1083 | return -EINVAL; | |
1084 | ||
1085 | /* Only return this if it is really good enough for us. */ | |
1086 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
1087 | return -ENOMEM; | |
1088 | ||
1089 | r = access(p, F_OK); | |
1090 | free(p); | |
1091 | ||
1092 | if (r >= 0) { | |
1093 | *ret = makedev(m, n); | |
1094 | return 0; | |
1095 | } | |
1096 | ||
1097 | return -ENOENT; | |
1098 | } | |
1099 | ||
f41607a6 LP |
1100 | static const char *const ioprio_class_table[] = { |
1101 | [IOPRIO_CLASS_NONE] = "none", | |
1102 | [IOPRIO_CLASS_RT] = "realtime", | |
1103 | [IOPRIO_CLASS_BE] = "best-effort", | |
1104 | [IOPRIO_CLASS_IDLE] = "idle" | |
1105 | }; | |
1106 | ||
f8b69d1d | 1107 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
1108 | |
1109 | static const char *const sigchld_code_table[] = { | |
1110 | [CLD_EXITED] = "exited", | |
1111 | [CLD_KILLED] = "killed", | |
1112 | [CLD_DUMPED] = "dumped", | |
1113 | [CLD_TRAPPED] = "trapped", | |
1114 | [CLD_STOPPED] = "stopped", | |
1115 | [CLD_CONTINUED] = "continued", | |
1116 | }; | |
1117 | ||
1118 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
1119 | ||
1120 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
1121 | [LOG_FAC(LOG_KERN)] = "kern", | |
1122 | [LOG_FAC(LOG_USER)] = "user", | |
1123 | [LOG_FAC(LOG_MAIL)] = "mail", | |
1124 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
1125 | [LOG_FAC(LOG_AUTH)] = "auth", | |
1126 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
1127 | [LOG_FAC(LOG_LPR)] = "lpr", | |
1128 | [LOG_FAC(LOG_NEWS)] = "news", | |
1129 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
1130 | [LOG_FAC(LOG_CRON)] = "cron", | |
1131 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
1132 | [LOG_FAC(LOG_FTP)] = "ftp", | |
1133 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
1134 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
1135 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
1136 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
1137 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
1138 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
1139 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
1140 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
1141 | }; | |
1142 | ||
f8b69d1d | 1143 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 | 1144 | |
adb8ec96 EV |
1145 | bool log_facility_unshifted_is_valid(int facility) { |
1146 | return facility >= 0 && facility <= LOG_FAC(~0); | |
1147 | } | |
1148 | ||
f41607a6 LP |
1149 | static const char *const log_level_table[] = { |
1150 | [LOG_EMERG] = "emerg", | |
1151 | [LOG_ALERT] = "alert", | |
1152 | [LOG_CRIT] = "crit", | |
1153 | [LOG_ERR] = "err", | |
1154 | [LOG_WARNING] = "warning", | |
1155 | [LOG_NOTICE] = "notice", | |
1156 | [LOG_INFO] = "info", | |
1157 | [LOG_DEBUG] = "debug" | |
1158 | }; | |
1159 | ||
f8b69d1d | 1160 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 | 1161 | |
adb8ec96 EV |
1162 | bool log_level_is_valid(int level) { |
1163 | return level >= 0 && level <= LOG_DEBUG; | |
1164 | } | |
1165 | ||
f41607a6 LP |
1166 | static const char* const sched_policy_table[] = { |
1167 | [SCHED_OTHER] = "other", | |
1168 | [SCHED_BATCH] = "batch", | |
1169 | [SCHED_IDLE] = "idle", | |
1170 | [SCHED_FIFO] = "fifo", | |
1171 | [SCHED_RR] = "rr" | |
1172 | }; | |
1173 | ||
f8b69d1d | 1174 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 | 1175 | |
517d56b1 | 1176 | static const char* const rlimit_table[_RLIMIT_MAX] = { |
f41607a6 LP |
1177 | [RLIMIT_CPU] = "LimitCPU", |
1178 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
1179 | [RLIMIT_DATA] = "LimitDATA", | |
1180 | [RLIMIT_STACK] = "LimitSTACK", | |
1181 | [RLIMIT_CORE] = "LimitCORE", | |
1182 | [RLIMIT_RSS] = "LimitRSS", | |
1183 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
1184 | [RLIMIT_AS] = "LimitAS", | |
1185 | [RLIMIT_NPROC] = "LimitNPROC", | |
1186 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
1187 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
1188 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
1189 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
1190 | [RLIMIT_NICE] = "LimitNICE", | |
1191 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
1192 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
1193 | }; | |
1194 | ||
1195 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
1196 | ||
65457142 FC |
1197 | bool kexec_loaded(void) { |
1198 | bool loaded = false; | |
1199 | char *s; | |
1200 | ||
1201 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
1202 | if (s[0] == '1') | |
1203 | loaded = true; | |
1204 | free(s); | |
1205 | } | |
1206 | return loaded; | |
1207 | } | |
fb9de93d | 1208 | |
87d2c1ff LP |
1209 | int prot_from_flags(int flags) { |
1210 | ||
1211 | switch (flags & O_ACCMODE) { | |
1212 | ||
1213 | case O_RDONLY: | |
1214 | return PROT_READ; | |
1215 | ||
1216 | case O_WRONLY: | |
1217 | return PROT_WRITE; | |
1218 | ||
1219 | case O_RDWR: | |
1220 | return PROT_READ|PROT_WRITE; | |
1221 | ||
1222 | default: | |
1223 | return -EINVAL; | |
1224 | } | |
7c99e0c1 | 1225 | } |
689b9a22 | 1226 | |
55d7bfc1 LP |
1227 | void* memdup(const void *p, size_t l) { |
1228 | void *r; | |
1229 | ||
1230 | assert(p); | |
1231 | ||
1232 | r = malloc(l); | |
1233 | if (!r) | |
1234 | return NULL; | |
1235 | ||
1236 | memcpy(r, p, l); | |
1237 | return r; | |
1238 | } | |
bb99a35a | 1239 | |
9bdc770c | 1240 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 | 1241 | bool stdout_is_tty, stderr_is_tty; |
8a7c93d8 LP |
1242 | pid_t parent_pid, agent_pid; |
1243 | sigset_t ss, saved_ss; | |
6bb92a16 LP |
1244 | unsigned n, i; |
1245 | va_list ap; | |
1246 | char **l; | |
1247 | ||
1248 | assert(pid); | |
1249 | assert(path); | |
1250 | ||
6bb92a16 LP |
1251 | /* Spawns a temporary TTY agent, making sure it goes away when |
1252 | * we go away */ | |
1253 | ||
8a7c93d8 LP |
1254 | parent_pid = getpid(); |
1255 | ||
1256 | /* First we temporarily block all signals, so that the new | |
1257 | * child has them blocked initially. This way, we can be sure | |
1258 | * that SIGTERMs are not lost we might send to the agent. */ | |
1259 | assert_se(sigfillset(&ss) >= 0); | |
1260 | assert_se(sigprocmask(SIG_SETMASK, &ss, &saved_ss) >= 0); | |
1261 | ||
6bb92a16 | 1262 | agent_pid = fork(); |
8a7c93d8 LP |
1263 | if (agent_pid < 0) { |
1264 | assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0); | |
6bb92a16 | 1265 | return -errno; |
8a7c93d8 | 1266 | } |
6bb92a16 LP |
1267 | |
1268 | if (agent_pid != 0) { | |
8a7c93d8 | 1269 | assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0); |
6bb92a16 LP |
1270 | *pid = agent_pid; |
1271 | return 0; | |
1272 | } | |
1273 | ||
1274 | /* In the child: | |
1275 | * | |
1276 | * Make sure the agent goes away when the parent dies */ | |
1277 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
1278 | _exit(EXIT_FAILURE); | |
1279 | ||
8a7c93d8 LP |
1280 | /* Make sure we actually can kill the agent, if we need to, in |
1281 | * case somebody invoked us from a shell script that trapped | |
1282 | * SIGTERM or so... */ | |
ce30c8dc LP |
1283 | (void) reset_all_signal_handlers(); |
1284 | (void) reset_signal_mask(); | |
8a7c93d8 | 1285 | |
6bb92a16 | 1286 | /* Check whether our parent died before we were able |
8a7c93d8 | 1287 | * to set the death signal and unblock the signals */ |
6bb92a16 LP |
1288 | if (getppid() != parent_pid) |
1289 | _exit(EXIT_SUCCESS); | |
1290 | ||
1291 | /* Don't leak fds to the agent */ | |
9bdc770c | 1292 | close_all_fds(except, n_except); |
6bb92a16 LP |
1293 | |
1294 | stdout_is_tty = isatty(STDOUT_FILENO); | |
1295 | stderr_is_tty = isatty(STDERR_FILENO); | |
1296 | ||
1297 | if (!stdout_is_tty || !stderr_is_tty) { | |
8a7c93d8 LP |
1298 | int fd; |
1299 | ||
6bb92a16 LP |
1300 | /* Detach from stdout/stderr. and reopen |
1301 | * /dev/tty for them. This is important to | |
1302 | * ensure that when systemctl is started via | |
1303 | * popen() or a similar call that expects to | |
1304 | * read EOF we actually do generate EOF and | |
1305 | * not delay this indefinitely by because we | |
1306 | * keep an unused copy of stdin around. */ | |
1307 | fd = open("/dev/tty", O_WRONLY); | |
1308 | if (fd < 0) { | |
56f64d95 | 1309 | log_error_errno(errno, "Failed to open /dev/tty: %m"); |
6bb92a16 LP |
1310 | _exit(EXIT_FAILURE); |
1311 | } | |
1312 | ||
1313 | if (!stdout_is_tty) | |
1314 | dup2(fd, STDOUT_FILENO); | |
1315 | ||
1316 | if (!stderr_is_tty) | |
1317 | dup2(fd, STDERR_FILENO); | |
1318 | ||
1319 | if (fd > 2) | |
1320 | close(fd); | |
1321 | } | |
1322 | ||
1323 | /* Count arguments */ | |
1324 | va_start(ap, path); | |
1325 | for (n = 0; va_arg(ap, char*); n++) | |
1326 | ; | |
1327 | va_end(ap); | |
1328 | ||
1329 | /* Allocate strv */ | |
1330 | l = alloca(sizeof(char *) * (n + 1)); | |
1331 | ||
1332 | /* Fill in arguments */ | |
1333 | va_start(ap, path); | |
1334 | for (i = 0; i <= n; i++) | |
1335 | l[i] = va_arg(ap, char*); | |
1336 | va_end(ap); | |
1337 | ||
1338 | execv(path, l); | |
1339 | _exit(EXIT_FAILURE); | |
1340 | } | |
68faf98c LP |
1341 | |
1342 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
1343 | struct rlimit highest, fixed; | |
1344 | ||
1345 | assert(rlim); | |
1346 | ||
1347 | if (setrlimit(resource, rlim) >= 0) | |
1348 | return 0; | |
1349 | ||
1350 | if (errno != EPERM) | |
1351 | return -errno; | |
1352 | ||
1353 | /* So we failed to set the desired setrlimit, then let's try | |
1354 | * to get as close as we can */ | |
1355 | assert_se(getrlimit(resource, &highest) == 0); | |
1356 | ||
1357 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
1358 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
1359 | ||
1360 | if (setrlimit(resource, &fixed) < 0) | |
1361 | return -errno; | |
1362 | ||
1363 | return 0; | |
1364 | } | |
3d9a4122 | 1365 | |
3d7415f4 LP |
1366 | bool http_etag_is_valid(const char *etag) { |
1367 | if (isempty(etag)) | |
1368 | return false; | |
1369 | ||
1370 | if (!endswith(etag, "\"")) | |
1371 | return false; | |
1372 | ||
1373 | if (!startswith(etag, "\"") && !startswith(etag, "W/\"")) | |
1374 | return false; | |
1375 | ||
1376 | return true; | |
1377 | } | |
1378 | ||
a2e03378 LP |
1379 | bool http_url_is_valid(const char *url) { |
1380 | const char *p; | |
49dbfa7b | 1381 | |
a2e03378 LP |
1382 | if (isempty(url)) |
1383 | return false; | |
49dbfa7b | 1384 | |
a2e03378 LP |
1385 | p = startswith(url, "http://"); |
1386 | if (!p) | |
1387 | p = startswith(url, "https://"); | |
1388 | if (!p) | |
1389 | return false; | |
49dbfa7b | 1390 | |
a2e03378 LP |
1391 | if (isempty(p)) |
1392 | return false; | |
49dbfa7b | 1393 | |
a2e03378 LP |
1394 | return ascii_is_valid(p); |
1395 | } | |
49dbfa7b | 1396 | |
a2e03378 LP |
1397 | bool documentation_url_is_valid(const char *url) { |
1398 | const char *p; | |
1399 | ||
1400 | if (isempty(url)) | |
1401 | return false; | |
1402 | ||
1403 | if (http_url_is_valid(url)) | |
49dbfa7b LP |
1404 | return true; |
1405 | ||
a2e03378 LP |
1406 | p = startswith(url, "file:/"); |
1407 | if (!p) | |
1408 | p = startswith(url, "info:"); | |
1409 | if (!p) | |
1410 | p = startswith(url, "man:"); | |
1411 | ||
1412 | if (isempty(p)) | |
1413 | return false; | |
1414 | ||
1415 | return ascii_is_valid(p); | |
49dbfa7b | 1416 | } |
9be346c9 HH |
1417 | |
1418 | bool in_initrd(void) { | |
73020ab2 | 1419 | static int saved = -1; |
825c6fe5 | 1420 | struct statfs s; |
8f33b5b8 | 1421 | |
825c6fe5 LP |
1422 | if (saved >= 0) |
1423 | return saved; | |
1424 | ||
1425 | /* We make two checks here: | |
1426 | * | |
1427 | * 1. the flag file /etc/initrd-release must exist | |
1428 | * 2. the root file system must be a memory file system | |
1429 | * | |
1430 | * The second check is extra paranoia, since misdetecting an | |
1431 | * initrd can have bad bad consequences due the initrd | |
1432 | * emptying when transititioning to the main systemd. | |
1433 | */ | |
1434 | ||
1435 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
1436 | statfs("/", &s) >= 0 && | |
943aad8c | 1437 | is_temporary_fs(&s); |
9be346c9 | 1438 | |
8f33b5b8 | 1439 | return saved; |
9be346c9 | 1440 | } |
069cfc85 | 1441 | |
0b507b17 LP |
1442 | bool string_is_safe(const char *p) { |
1443 | const char *t; | |
1444 | ||
6294aa76 LP |
1445 | if (!p) |
1446 | return false; | |
0b507b17 LP |
1447 | |
1448 | for (t = p; *t; t++) { | |
01539d6e | 1449 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
1450 | return false; |
1451 | ||
843f6bf4 | 1452 | if (strchr("\\\"\'\x7f", *t)) |
0b507b17 LP |
1453 | return false; |
1454 | } | |
1455 | ||
1456 | return true; | |
1457 | } | |
cfbc22ab | 1458 | |
a9e12476 KS |
1459 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
1460 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 1461 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
1462 | size_t l, u, idx; |
1463 | const void *p; | |
1464 | int comparison; | |
1465 | ||
1466 | l = 0; | |
1467 | u = nmemb; | |
1468 | while (l < u) { | |
1469 | idx = (l + u) / 2; | |
1470 | p = (void *)(((const char *) base) + (idx * size)); | |
1471 | comparison = compar(key, p, arg); | |
1472 | if (comparison < 0) | |
1473 | u = idx; | |
1474 | else if (comparison > 0) | |
1475 | l = idx + 1; | |
1476 | else | |
1477 | return (void *)p; | |
1478 | } | |
1479 | return NULL; | |
1480 | } | |
09017585 | 1481 | |
20f56fdd DR |
1482 | void init_gettext(void) { |
1483 | setlocale(LC_ALL, ""); | |
1484 | textdomain(GETTEXT_PACKAGE); | |
1485 | } | |
1486 | ||
09017585 MS |
1487 | bool is_locale_utf8(void) { |
1488 | const char *set; | |
1489 | static int cached_answer = -1; | |
1490 | ||
1491 | if (cached_answer >= 0) | |
1492 | goto out; | |
1493 | ||
1494 | if (!setlocale(LC_ALL, "")) { | |
1495 | cached_answer = true; | |
1496 | goto out; | |
1497 | } | |
1498 | ||
1499 | set = nl_langinfo(CODESET); | |
1500 | if (!set) { | |
1501 | cached_answer = true; | |
1502 | goto out; | |
1503 | } | |
1504 | ||
f168c273 | 1505 | if (streq(set, "UTF-8")) { |
fee79e01 HH |
1506 | cached_answer = true; |
1507 | goto out; | |
1508 | } | |
1509 | ||
6cf2f1d9 HH |
1510 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
1511 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
1512 | set = setlocale(LC_CTYPE, NULL); |
1513 | if (!set) { | |
1514 | cached_answer = true; | |
1515 | goto out; | |
1516 | } | |
1517 | ||
6cf2f1d9 HH |
1518 | /* Check result, but ignore the result if C was set |
1519 | * explicitly. */ | |
1520 | cached_answer = | |
9797f89b | 1521 | STR_IN_SET(set, "C", "POSIX") && |
6cf2f1d9 HH |
1522 | !getenv("LC_ALL") && |
1523 | !getenv("LC_CTYPE") && | |
1524 | !getenv("LANG"); | |
fee79e01 | 1525 | |
09017585 | 1526 | out: |
6cf2f1d9 | 1527 | return (bool) cached_answer; |
09017585 | 1528 | } |
c339d977 MS |
1529 | |
1530 | const char *draw_special_char(DrawSpecialChar ch) { | |
1531 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
6b01f1d3 | 1532 | |
c339d977 | 1533 | /* UTF-8 */ { |
6b01f1d3 | 1534 | [DRAW_TREE_VERTICAL] = "\342\224\202 ", /* │ */ |
45a5ff0d MS |
1535 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ |
1536 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 1537 | [DRAW_TREE_SPACE] = " ", /* */ |
6b01f1d3 LP |
1538 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243", /* ‣ */ |
1539 | [DRAW_BLACK_CIRCLE] = "\342\227\217", /* ● */ | |
1540 | [DRAW_ARROW] = "\342\206\222", /* → */ | |
13f8b8cb | 1541 | [DRAW_DASH] = "\342\200\223", /* – */ |
c339d977 | 1542 | }, |
6b01f1d3 | 1543 | |
c339d977 | 1544 | /* ASCII fallback */ { |
6b01f1d3 | 1545 | [DRAW_TREE_VERTICAL] = "| ", |
45a5ff0d MS |
1546 | [DRAW_TREE_BRANCH] = "|-", |
1547 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 1548 | [DRAW_TREE_SPACE] = " ", |
6b01f1d3 LP |
1549 | [DRAW_TRIANGULAR_BULLET] = ">", |
1550 | [DRAW_BLACK_CIRCLE] = "*", | |
1551 | [DRAW_ARROW] = "->", | |
13f8b8cb | 1552 | [DRAW_DASH] = "-", |
c339d977 MS |
1553 | } |
1554 | }; | |
1555 | ||
1556 | return draw_table[!is_locale_utf8()][ch]; | |
1557 | } | |
409bc9c3 | 1558 | |
240dbaa4 LP |
1559 | int on_ac_power(void) { |
1560 | bool found_offline = false, found_online = false; | |
1561 | _cleanup_closedir_ DIR *d = NULL; | |
1562 | ||
1563 | d = opendir("/sys/class/power_supply"); | |
1564 | if (!d) | |
6d890034 | 1565 | return errno == ENOENT ? true : -errno; |
240dbaa4 LP |
1566 | |
1567 | for (;;) { | |
1568 | struct dirent *de; | |
240dbaa4 LP |
1569 | _cleanup_close_ int fd = -1, device = -1; |
1570 | char contents[6]; | |
1571 | ssize_t n; | |
240dbaa4 | 1572 | |
3fd11280 FW |
1573 | errno = 0; |
1574 | de = readdir(d); | |
1575 | if (!de && errno != 0) | |
1576 | return -errno; | |
240dbaa4 LP |
1577 | |
1578 | if (!de) | |
1579 | break; | |
1580 | ||
a34bf9db | 1581 | if (hidden_file(de->d_name)) |
240dbaa4 LP |
1582 | continue; |
1583 | ||
1584 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
1585 | if (device < 0) { | |
1586 | if (errno == ENOENT || errno == ENOTDIR) | |
1587 | continue; | |
1588 | ||
1589 | return -errno; | |
1590 | } | |
1591 | ||
1592 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
1593 | if (fd < 0) { | |
1594 | if (errno == ENOENT) | |
1595 | continue; | |
1596 | ||
1597 | return -errno; | |
1598 | } | |
1599 | ||
1600 | n = read(fd, contents, sizeof(contents)); | |
1601 | if (n < 0) | |
1602 | return -errno; | |
1603 | ||
1604 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
1605 | continue; | |
1606 | ||
03e334a1 | 1607 | safe_close(fd); |
240dbaa4 LP |
1608 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
1609 | if (fd < 0) { | |
1610 | if (errno == ENOENT) | |
1611 | continue; | |
1612 | ||
1613 | return -errno; | |
1614 | } | |
1615 | ||
1616 | n = read(fd, contents, sizeof(contents)); | |
1617 | if (n < 0) | |
1618 | return -errno; | |
1619 | ||
1620 | if (n != 2 || contents[1] != '\n') | |
1621 | return -EIO; | |
1622 | ||
1623 | if (contents[0] == '1') { | |
1624 | found_online = true; | |
1625 | break; | |
1626 | } else if (contents[0] == '0') | |
1627 | found_offline = true; | |
1628 | else | |
1629 | return -EIO; | |
1630 | } | |
1631 | ||
1632 | return found_online || !found_offline; | |
1633 | } | |
fabe5c0e | 1634 | |
ca2d3784 ZJS |
1635 | void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) { |
1636 | size_t a, newalloc; | |
392d5b37 LP |
1637 | void *q; |
1638 | ||
98088803 | 1639 | assert(p); |
e93c33d4 SL |
1640 | assert(allocated); |
1641 | ||
392d5b37 LP |
1642 | if (*allocated >= need) |
1643 | return *p; | |
1644 | ||
ca2d3784 ZJS |
1645 | newalloc = MAX(need * 2, 64u / size); |
1646 | a = newalloc * size; | |
98088803 LP |
1647 | |
1648 | /* check for overflows */ | |
ca2d3784 | 1649 | if (a < size * need) |
98088803 LP |
1650 | return NULL; |
1651 | ||
392d5b37 LP |
1652 | q = realloc(*p, a); |
1653 | if (!q) | |
1654 | return NULL; | |
1655 | ||
1656 | *p = q; | |
ca2d3784 | 1657 | *allocated = newalloc; |
392d5b37 LP |
1658 | return q; |
1659 | } | |
aa96c6cb | 1660 | |
ca2d3784 | 1661 | void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) { |
98088803 | 1662 | size_t prev; |
4545a231 DH |
1663 | uint8_t *q; |
1664 | ||
98088803 LP |
1665 | assert(p); |
1666 | assert(allocated); | |
1667 | ||
1668 | prev = *allocated; | |
1669 | ||
ca2d3784 | 1670 | q = greedy_realloc(p, allocated, need, size); |
4545a231 DH |
1671 | if (!q) |
1672 | return NULL; | |
1673 | ||
1674 | if (*allocated > prev) | |
ca2d3784 | 1675 | memzero(q + prev * size, (*allocated - prev) * size); |
4545a231 DH |
1676 | |
1677 | return q; | |
1678 | } | |
1679 | ||
aa96c6cb LP |
1680 | bool id128_is_valid(const char *s) { |
1681 | size_t i, l; | |
1682 | ||
1683 | l = strlen(s); | |
1684 | if (l == 32) { | |
1685 | ||
1686 | /* Simple formatted 128bit hex string */ | |
1687 | ||
1688 | for (i = 0; i < l; i++) { | |
1689 | char c = s[i]; | |
1690 | ||
1691 | if (!(c >= '0' && c <= '9') && | |
1692 | !(c >= 'a' && c <= 'z') && | |
1693 | !(c >= 'A' && c <= 'Z')) | |
1694 | return false; | |
1695 | } | |
1696 | ||
1697 | } else if (l == 36) { | |
1698 | ||
1699 | /* Formatted UUID */ | |
1700 | ||
1701 | for (i = 0; i < l; i++) { | |
1702 | char c = s[i]; | |
1703 | ||
1704 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
1705 | if (c != '-') | |
1706 | return false; | |
1707 | } else { | |
1708 | if (!(c >= '0' && c <= '9') && | |
1709 | !(c >= 'a' && c <= 'z') && | |
1710 | !(c >= 'A' && c <= 'Z')) | |
1711 | return false; | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | } else | |
1716 | return false; | |
1717 | ||
1718 | return true; | |
1719 | } | |
7085053a | 1720 | |
74df0fca | 1721 | int shall_restore_state(void) { |
1a299299 | 1722 | _cleanup_free_ char *value = NULL; |
74df0fca | 1723 | int r; |
295edddf | 1724 | |
1a299299 | 1725 | r = get_proc_cmdline_key("systemd.restore_state=", &value); |
74df0fca LP |
1726 | if (r < 0) |
1727 | return r; | |
1a299299 LP |
1728 | if (r == 0) |
1729 | return true; | |
295edddf | 1730 | |
1a299299 | 1731 | return parse_boolean(value) != 0; |
74df0fca LP |
1732 | } |
1733 | ||
1734 | int proc_cmdline(char **ret) { | |
b5884878 | 1735 | assert(ret); |
295edddf | 1736 | |
75f86906 | 1737 | if (detect_container() > 0) |
b5884878 LP |
1738 | return get_process_cmdline(1, 0, false, ret); |
1739 | else | |
1740 | return read_one_line_file("/proc/cmdline", ret); | |
295edddf | 1741 | } |
bc9fd78c | 1742 | |
059cb385 | 1743 | int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) { |
141a79f4 | 1744 | _cleanup_free_ char *line = NULL; |
f32d2db1 | 1745 | const char *p; |
141a79f4 ZJS |
1746 | int r; |
1747 | ||
059cb385 LP |
1748 | assert(parse_item); |
1749 | ||
141a79f4 ZJS |
1750 | r = proc_cmdline(&line); |
1751 | if (r < 0) | |
b5884878 | 1752 | return r; |
141a79f4 | 1753 | |
f32d2db1 LP |
1754 | p = line; |
1755 | for (;;) { | |
1756 | _cleanup_free_ char *word = NULL; | |
1757 | char *value = NULL; | |
141a79f4 | 1758 | |
12ba2c44 | 1759 | r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX); |
f32d2db1 LP |
1760 | if (r < 0) |
1761 | return r; | |
1762 | if (r == 0) | |
1763 | break; | |
141a79f4 | 1764 | |
059cb385 LP |
1765 | /* Filter out arguments that are intended only for the |
1766 | * initrd */ | |
1767 | if (!in_initrd() && startswith(word, "rd.")) | |
1768 | continue; | |
1769 | ||
1770 | value = strchr(word, '='); | |
1771 | if (value) | |
1772 | *(value++) = 0; | |
1773 | ||
1774 | r = parse_item(word, value); | |
1775 | if (r < 0) | |
141a79f4 | 1776 | return r; |
141a79f4 ZJS |
1777 | } |
1778 | ||
1779 | return 0; | |
1780 | } | |
1781 | ||
1a299299 LP |
1782 | int get_proc_cmdline_key(const char *key, char **value) { |
1783 | _cleanup_free_ char *line = NULL, *ret = NULL; | |
1784 | bool found = false; | |
1785 | const char *p; | |
1786 | int r; | |
1787 | ||
1788 | assert(key); | |
1789 | ||
1790 | r = proc_cmdline(&line); | |
1791 | if (r < 0) | |
1792 | return r; | |
1793 | ||
1794 | p = line; | |
1795 | for (;;) { | |
1796 | _cleanup_free_ char *word = NULL; | |
1797 | const char *e; | |
1798 | ||
12ba2c44 | 1799 | r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX); |
1a299299 LP |
1800 | if (r < 0) |
1801 | return r; | |
1802 | if (r == 0) | |
1803 | break; | |
1804 | ||
1805 | /* Filter out arguments that are intended only for the | |
1806 | * initrd */ | |
1807 | if (!in_initrd() && startswith(word, "rd.")) | |
1808 | continue; | |
1809 | ||
1810 | if (value) { | |
1811 | e = startswith(word, key); | |
1812 | if (!e) | |
1813 | continue; | |
1814 | ||
1815 | r = free_and_strdup(&ret, e); | |
1816 | if (r < 0) | |
1817 | return r; | |
1818 | ||
1819 | found = true; | |
1820 | } else { | |
1821 | if (streq(word, key)) | |
1822 | found = true; | |
1823 | } | |
1824 | } | |
1825 | ||
1826 | if (value) { | |
1827 | *value = ret; | |
1828 | ret = NULL; | |
1829 | } | |
1830 | ||
1831 | return found; | |
1832 | ||
1833 | } | |
1834 | ||
bc9fd78c LP |
1835 | int container_get_leader(const char *machine, pid_t *pid) { |
1836 | _cleanup_free_ char *s = NULL, *class = NULL; | |
1837 | const char *p; | |
1838 | pid_t leader; | |
1839 | int r; | |
1840 | ||
1841 | assert(machine); | |
1842 | assert(pid); | |
1843 | ||
b9a8d250 LP |
1844 | if (!machine_name_is_valid(machine)) |
1845 | return -EINVAL; | |
1846 | ||
63c372cb | 1847 | p = strjoina("/run/systemd/machines/", machine); |
bc9fd78c LP |
1848 | r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); |
1849 | if (r == -ENOENT) | |
1850 | return -EHOSTDOWN; | |
1851 | if (r < 0) | |
1852 | return r; | |
1853 | if (!s) | |
1854 | return -EIO; | |
1855 | ||
1856 | if (!streq_ptr(class, "container")) | |
1857 | return -EIO; | |
1858 | ||
1859 | r = parse_pid(s, &leader); | |
1860 | if (r < 0) | |
1861 | return r; | |
1862 | if (leader <= 1) | |
1863 | return -EIO; | |
1864 | ||
1865 | *pid = leader; | |
1866 | return 0; | |
1867 | } | |
1868 | ||
671c3419 RM |
1869 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd) { |
1870 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1, usernsfd = -1; | |
359a06aa | 1871 | int rfd = -1; |
bc9fd78c LP |
1872 | |
1873 | assert(pid >= 0); | |
bc9fd78c | 1874 | |
878cd7e9 LP |
1875 | if (mntns_fd) { |
1876 | const char *mntns; | |
a4475f57 | 1877 | |
878cd7e9 LP |
1878 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
1879 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
1880 | if (mntnsfd < 0) | |
1881 | return -errno; | |
1882 | } | |
bc9fd78c | 1883 | |
878cd7e9 LP |
1884 | if (pidns_fd) { |
1885 | const char *pidns; | |
1886 | ||
1887 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
1888 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
1889 | if (pidnsfd < 0) | |
1890 | return -errno; | |
1891 | } | |
1892 | ||
1893 | if (netns_fd) { | |
1894 | const char *netns; | |
1895 | ||
1896 | netns = procfs_file_alloca(pid, "ns/net"); | |
1897 | netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
1898 | if (netnsfd < 0) | |
1899 | return -errno; | |
1900 | } | |
1901 | ||
671c3419 RM |
1902 | if (userns_fd) { |
1903 | const char *userns; | |
1904 | ||
1905 | userns = procfs_file_alloca(pid, "ns/user"); | |
1906 | usernsfd = open(userns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
1907 | if (usernsfd < 0 && errno != ENOENT) | |
1908 | return -errno; | |
1909 | } | |
1910 | ||
878cd7e9 LP |
1911 | if (root_fd) { |
1912 | const char *root; | |
1913 | ||
1914 | root = procfs_file_alloca(pid, "root"); | |
1915 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
1916 | if (rfd < 0) | |
1917 | return -errno; | |
1918 | } | |
1919 | ||
1920 | if (pidns_fd) | |
1921 | *pidns_fd = pidnsfd; | |
bc9fd78c | 1922 | |
878cd7e9 LP |
1923 | if (mntns_fd) |
1924 | *mntns_fd = mntnsfd; | |
1925 | ||
1926 | if (netns_fd) | |
1927 | *netns_fd = netnsfd; | |
1928 | ||
671c3419 RM |
1929 | if (userns_fd) |
1930 | *userns_fd = usernsfd; | |
1931 | ||
878cd7e9 LP |
1932 | if (root_fd) |
1933 | *root_fd = rfd; | |
1934 | ||
671c3419 | 1935 | pidnsfd = mntnsfd = netnsfd = usernsfd = -1; |
bc9fd78c LP |
1936 | |
1937 | return 0; | |
1938 | } | |
1939 | ||
671c3419 RM |
1940 | int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd) { |
1941 | if (userns_fd >= 0) { | |
1942 | /* Can't setns to your own userns, since then you could | |
1943 | * escalate from non-root to root in your own namespace, so | |
1944 | * check if namespaces equal before attempting to enter. */ | |
1945 | _cleanup_free_ char *userns_fd_path = NULL; | |
1946 | int r; | |
1947 | if (asprintf(&userns_fd_path, "/proc/self/fd/%d", userns_fd) < 0) | |
1948 | return -ENOMEM; | |
1949 | ||
1950 | r = files_same(userns_fd_path, "/proc/self/ns/user"); | |
1951 | if (r < 0) | |
1952 | return r; | |
1953 | if (r) | |
1954 | userns_fd = -1; | |
1955 | } | |
bc9fd78c | 1956 | |
878cd7e9 LP |
1957 | if (pidns_fd >= 0) |
1958 | if (setns(pidns_fd, CLONE_NEWPID) < 0) | |
1959 | return -errno; | |
a4475f57 | 1960 | |
878cd7e9 LP |
1961 | if (mntns_fd >= 0) |
1962 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
1963 | return -errno; | |
bc9fd78c | 1964 | |
878cd7e9 LP |
1965 | if (netns_fd >= 0) |
1966 | if (setns(netns_fd, CLONE_NEWNET) < 0) | |
1967 | return -errno; | |
bc9fd78c | 1968 | |
671c3419 RM |
1969 | if (userns_fd >= 0) |
1970 | if (setns(userns_fd, CLONE_NEWUSER) < 0) | |
1971 | return -errno; | |
1972 | ||
878cd7e9 LP |
1973 | if (root_fd >= 0) { |
1974 | if (fchdir(root_fd) < 0) | |
1975 | return -errno; | |
1976 | ||
1977 | if (chroot(".") < 0) | |
1978 | return -errno; | |
1979 | } | |
bc9fd78c | 1980 | |
b4da6d6b | 1981 | return reset_uid_gid(); |
bc9fd78c | 1982 | } |
bf108e55 | 1983 | |
fdb9161c LP |
1984 | int fd_warn_permissions(const char *path, int fd) { |
1985 | struct stat st; | |
1986 | ||
1987 | if (fstat(fd, &st) < 0) | |
1988 | return -errno; | |
1989 | ||
1990 | if (st.st_mode & 0111) | |
1991 | log_warning("Configuration file %s is marked executable. Please remove executable permission bits. Proceeding anyway.", path); | |
1992 | ||
1993 | if (st.st_mode & 0002) | |
1994 | log_warning("Configuration file %s is marked world-writable. Please remove world writability permission bits. Proceeding anyway.", path); | |
1995 | ||
1996 | if (getpid() == 1 && (st.st_mode & 0044) != 0044) | |
1997 | log_warning("Configuration file %s is marked world-inaccessible. This has no effect as configuration data is accessible via APIs without restrictions. Proceeding anyway.", path); | |
1998 | ||
1999 | return 0; | |
2000 | } | |
6afc95b7 | 2001 | |
ac45f971 | 2002 | unsigned long personality_from_string(const char *p) { |
6afc95b7 LP |
2003 | |
2004 | /* Parse a personality specifier. We introduce our own | |
2005 | * identifiers that indicate specific ABIs, rather than just | |
2006 | * hints regarding the register size, since we want to keep | |
2007 | * things open for multiple locally supported ABIs for the | |
2008 | * same register size. We try to reuse the ABI identifiers | |
2009 | * used by libseccomp. */ | |
2010 | ||
2011 | #if defined(__x86_64__) | |
2012 | ||
2013 | if (streq(p, "x86")) | |
2014 | return PER_LINUX32; | |
2015 | ||
2016 | if (streq(p, "x86-64")) | |
2017 | return PER_LINUX; | |
2018 | ||
2019 | #elif defined(__i386__) | |
2020 | ||
2021 | if (streq(p, "x86")) | |
2022 | return PER_LINUX; | |
7517f51e HB |
2023 | |
2024 | #elif defined(__s390x__) | |
2025 | ||
2026 | if (streq(p, "s390")) | |
2027 | return PER_LINUX32; | |
2028 | ||
2029 | if (streq(p, "s390x")) | |
2030 | return PER_LINUX; | |
2031 | ||
2032 | #elif defined(__s390__) | |
2033 | ||
2034 | if (streq(p, "s390")) | |
2035 | return PER_LINUX; | |
6afc95b7 LP |
2036 | #endif |
2037 | ||
050f7277 | 2038 | return PERSONALITY_INVALID; |
6afc95b7 | 2039 | } |
ac45f971 LP |
2040 | |
2041 | const char* personality_to_string(unsigned long p) { | |
2042 | ||
2043 | #if defined(__x86_64__) | |
2044 | ||
2045 | if (p == PER_LINUX32) | |
2046 | return "x86"; | |
2047 | ||
2048 | if (p == PER_LINUX) | |
2049 | return "x86-64"; | |
2050 | ||
2051 | #elif defined(__i386__) | |
2052 | ||
2053 | if (p == PER_LINUX) | |
2054 | return "x86"; | |
7517f51e HB |
2055 | |
2056 | #elif defined(__s390x__) | |
2057 | ||
2058 | if (p == PER_LINUX) | |
2059 | return "s390x"; | |
2060 | ||
2061 | if (p == PER_LINUX32) | |
2062 | return "s390"; | |
2063 | ||
2064 | #elif defined(__s390__) | |
2065 | ||
2066 | if (p == PER_LINUX) | |
2067 | return "s390"; | |
2068 | ||
ac45f971 LP |
2069 | #endif |
2070 | ||
2071 | return NULL; | |
2072 | } | |
1c231f56 LP |
2073 | |
2074 | uint64_t physical_memory(void) { | |
2075 | long mem; | |
2076 | ||
2077 | /* We return this as uint64_t in case we are running as 32bit | |
2078 | * process on a 64bit kernel with huge amounts of memory */ | |
2079 | ||
2080 | mem = sysconf(_SC_PHYS_PAGES); | |
2081 | assert(mem > 0); | |
2082 | ||
2083 | return (uint64_t) mem * (uint64_t) page_size(); | |
2084 | } | |
6db615c1 | 2085 | |
966bff26 | 2086 | int update_reboot_param_file(const char *param) { |
c5220a94 MO |
2087 | int r = 0; |
2088 | ||
2089 | if (param) { | |
4c1fc3e4 | 2090 | r = write_string_file(REBOOT_PARAM_FILE, param, WRITE_STRING_FILE_CREATE); |
c5220a94 | 2091 | if (r < 0) |
e53fc357 | 2092 | return log_error_errno(r, "Failed to write reboot param to "REBOOT_PARAM_FILE": %m"); |
c5220a94 | 2093 | } else |
e53fc357 | 2094 | (void) unlink(REBOOT_PARAM_FILE); |
c5220a94 | 2095 | |
e53fc357 | 2096 | return 0; |
c5220a94 | 2097 | } |
6d313367 | 2098 | |
5261ba90 TT |
2099 | int is_symlink(const char *path) { |
2100 | struct stat info; | |
2101 | ||
2102 | if (lstat(path, &info) < 0) | |
2103 | return -errno; | |
2104 | ||
be57e297 LP |
2105 | return !!S_ISLNK(info.st_mode); |
2106 | } | |
5261ba90 | 2107 | |
be57e297 LP |
2108 | int is_dir(const char* path, bool follow) { |
2109 | struct stat st; | |
d1bddcec | 2110 | int r; |
be57e297 | 2111 | |
d1bddcec LP |
2112 | if (follow) |
2113 | r = stat(path, &st); | |
2114 | else | |
2115 | r = lstat(path, &st); | |
2116 | if (r < 0) | |
2117 | return -errno; | |
be57e297 LP |
2118 | |
2119 | return !!S_ISDIR(st.st_mode); | |
a0627f82 | 2120 | } |
7629889c | 2121 | |
ce5b3ad4 SJ |
2122 | int is_device_node(const char *path) { |
2123 | struct stat info; | |
2124 | ||
2125 | if (lstat(path, &info) < 0) | |
2126 | return -errno; | |
2127 | ||
2128 | return !!(S_ISBLK(info.st_mode) || S_ISCHR(info.st_mode)); | |
2129 | } | |
2130 | ||
10f9c755 | 2131 | ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags) { |
df241a67 | 2132 | char fn[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(int) + 1]; |
10f9c755 LP |
2133 | _cleanup_close_ int fd = -1; |
2134 | ssize_t l; | |
2135 | ||
2136 | /* The kernel doesn't have a fgetxattrat() command, hence let's emulate one */ | |
2137 | ||
df241a67 | 2138 | fd = openat(dirfd, filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_PATH|(flags & AT_SYMLINK_NOFOLLOW ? O_NOFOLLOW : 0)); |
10f9c755 LP |
2139 | if (fd < 0) |
2140 | return -errno; | |
2141 | ||
df241a67 LP |
2142 | xsprintf(fn, "/proc/self/fd/%i", fd); |
2143 | ||
2144 | l = getxattr(fn, attribute, value, size); | |
10f9c755 LP |
2145 | if (l < 0) |
2146 | return -errno; | |
2147 | ||
2148 | return l; | |
2149 | } | |
2150 | ||
2151 | static int parse_crtime(le64_t le, usec_t *usec) { | |
4a4d89b6 | 2152 | uint64_t u; |
10f9c755 LP |
2153 | |
2154 | assert(usec); | |
2155 | ||
2156 | u = le64toh(le); | |
2157 | if (u == 0 || u == (uint64_t) -1) | |
2158 | return -EIO; | |
2159 | ||
2160 | *usec = (usec_t) u; | |
2161 | return 0; | |
2162 | } | |
2163 | ||
2164 | int fd_getcrtime(int fd, usec_t *usec) { | |
4a4d89b6 LP |
2165 | le64_t le; |
2166 | ssize_t n; | |
2167 | ||
2168 | assert(fd >= 0); | |
2169 | assert(usec); | |
2170 | ||
2171 | /* Until Linux gets a real concept of birthtime/creation time, | |
2172 | * let's fake one with xattrs */ | |
2173 | ||
2174 | n = fgetxattr(fd, "user.crtime_usec", &le, sizeof(le)); | |
2175 | if (n < 0) | |
2176 | return -errno; | |
2177 | if (n != sizeof(le)) | |
2178 | return -EIO; | |
2179 | ||
10f9c755 LP |
2180 | return parse_crtime(le, usec); |
2181 | } | |
2182 | ||
2183 | int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags) { | |
2184 | le64_t le; | |
2185 | ssize_t n; | |
2186 | ||
2187 | n = fgetxattrat_fake(dirfd, name, "user.crtime_usec", &le, sizeof(le), flags); | |
2188 | if (n < 0) | |
2189 | return -errno; | |
2190 | if (n != sizeof(le)) | |
4a4d89b6 LP |
2191 | return -EIO; |
2192 | ||
10f9c755 | 2193 | return parse_crtime(le, usec); |
4a4d89b6 LP |
2194 | } |
2195 | ||
2196 | int path_getcrtime(const char *p, usec_t *usec) { | |
4a4d89b6 LP |
2197 | le64_t le; |
2198 | ssize_t n; | |
2199 | ||
2200 | assert(p); | |
2201 | assert(usec); | |
2202 | ||
2203 | n = getxattr(p, "user.crtime_usec", &le, sizeof(le)); | |
2204 | if (n < 0) | |
2205 | return -errno; | |
2206 | if (n != sizeof(le)) | |
2207 | return -EIO; | |
2208 | ||
10f9c755 | 2209 | return parse_crtime(le, usec); |
4a4d89b6 LP |
2210 | } |
2211 | ||
2212 | int fd_setcrtime(int fd, usec_t usec) { | |
2213 | le64_t le; | |
2214 | ||
2215 | assert(fd >= 0); | |
2216 | ||
d61b600d LP |
2217 | if (usec <= 0) |
2218 | usec = now(CLOCK_REALTIME); | |
2219 | ||
4a4d89b6 | 2220 | le = htole64((uint64_t) usec); |
2c39ea52 | 2221 | if (fsetxattr(fd, "user.crtime_usec", &le, sizeof(le), 0) < 0) |
4a4d89b6 LP |
2222 | return -errno; |
2223 | ||
2224 | return 0; | |
2225 | } | |
a354329f | 2226 | |
1ed8f8c1 | 2227 | int chattr_fd(int fd, unsigned value, unsigned mask) { |
45030287 | 2228 | unsigned old_attr, new_attr; |
03091baa | 2229 | struct stat st; |
11689d2a LP |
2230 | |
2231 | assert(fd >= 0); | |
2232 | ||
03091baa LP |
2233 | if (fstat(fd, &st) < 0) |
2234 | return -errno; | |
2235 | ||
2236 | /* Explicitly check whether this is a regular file or | |
2237 | * directory. If it is anything else (such as a device node or | |
2238 | * fifo), then the ioctl will not hit the file systems but | |
2239 | * possibly drivers, where the ioctl might have different | |
2240 | * effects. Notably, DRM is using the same ioctl() number. */ | |
2241 | ||
2242 | if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode)) | |
2243 | return -ENOTTY; | |
2244 | ||
45030287 LP |
2245 | if (mask == 0) |
2246 | return 0; | |
2247 | ||
11689d2a LP |
2248 | if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0) |
2249 | return -errno; | |
2250 | ||
1ed8f8c1 | 2251 | new_attr = (old_attr & ~mask) | (value & mask); |
11689d2a LP |
2252 | if (new_attr == old_attr) |
2253 | return 0; | |
2254 | ||
2255 | if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0) | |
2256 | return -errno; | |
2257 | ||
1ed8f8c1 | 2258 | return 1; |
11689d2a LP |
2259 | } |
2260 | ||
1ed8f8c1 | 2261 | int chattr_path(const char *p, unsigned value, unsigned mask) { |
11689d2a LP |
2262 | _cleanup_close_ int fd = -1; |
2263 | ||
45030287 LP |
2264 | assert(p); |
2265 | ||
2266 | if (mask == 0) | |
2267 | return 0; | |
2268 | ||
01b72568 | 2269 | fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW); |
11689d2a LP |
2270 | if (fd < 0) |
2271 | return -errno; | |
2272 | ||
1ed8f8c1 | 2273 | return chattr_fd(fd, value, mask); |
5b9fbd35 GB |
2274 | } |
2275 | ||
01b72568 | 2276 | int read_attr_fd(int fd, unsigned *ret) { |
03091baa LP |
2277 | struct stat st; |
2278 | ||
01b72568 LP |
2279 | assert(fd >= 0); |
2280 | ||
03091baa LP |
2281 | if (fstat(fd, &st) < 0) |
2282 | return -errno; | |
2283 | ||
2284 | if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode)) | |
2285 | return -ENOTTY; | |
2286 | ||
01b72568 LP |
2287 | if (ioctl(fd, FS_IOC_GETFLAGS, ret) < 0) |
2288 | return -errno; | |
2289 | ||
2290 | return 0; | |
2291 | } | |
2292 | ||
2293 | int read_attr_path(const char *p, unsigned *ret) { | |
2294 | _cleanup_close_ int fd = -1; | |
2295 | ||
2296 | assert(p); | |
2297 | assert(ret); | |
2298 | ||
2299 | fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW); | |
2300 | if (fd < 0) | |
2301 | return -errno; | |
2302 | ||
2303 | return read_attr_fd(fd, ret); | |
2304 | } | |
30535c16 | 2305 | |
3d7415f4 LP |
2306 | int syslog_parse_priority(const char **p, int *priority, bool with_facility) { |
2307 | int a = 0, b = 0, c = 0; | |
2308 | int k; | |
2309 | ||
2310 | assert(p); | |
2311 | assert(*p); | |
2312 | assert(priority); | |
2313 | ||
2314 | if ((*p)[0] != '<') | |
2315 | return 0; | |
2316 | ||
2317 | if (!strchr(*p, '>')) | |
2318 | return 0; | |
2319 | ||
2320 | if ((*p)[2] == '>') { | |
2321 | c = undecchar((*p)[1]); | |
2322 | k = 3; | |
2323 | } else if ((*p)[3] == '>') { | |
2324 | b = undecchar((*p)[1]); | |
2325 | c = undecchar((*p)[2]); | |
2326 | k = 4; | |
2327 | } else if ((*p)[4] == '>') { | |
2328 | a = undecchar((*p)[1]); | |
2329 | b = undecchar((*p)[2]); | |
2330 | c = undecchar((*p)[3]); | |
2331 | k = 5; | |
2332 | } else | |
2333 | return 0; | |
2334 | ||
2335 | if (a < 0 || b < 0 || c < 0 || | |
2336 | (!with_facility && (a || b || c > 7))) | |
2337 | return 0; | |
2338 | ||
2339 | if (with_facility) | |
2340 | *priority = a*100 + b*10 + c; | |
2341 | else | |
2342 | *priority = (*priority & LOG_FACMASK) | c; | |
2343 | ||
2344 | *p += k; | |
2345 | return 1; | |
2346 | } | |
9cad100e BB |
2347 | |
2348 | ssize_t string_table_lookup(const char * const *table, size_t len, const char *key) { | |
2349 | size_t i; | |
2350 | ||
2351 | if (!key) | |
2352 | return -1; | |
2353 | ||
2354 | for (i = 0; i < len; ++i) | |
2355 | if (streq_ptr(table[i], key)) | |
8c721f2b | 2356 | return (ssize_t) i; |
9cad100e BB |
2357 | |
2358 | return -1; | |
2359 | } | |
1c8da044 | 2360 | |
f85ef957 AC |
2361 | int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath) { |
2362 | struct stat buf; | |
2363 | int ret; | |
2364 | ||
2365 | ret = renameat2(olddirfd, oldpath, newdirfd, newpath, RENAME_NOREPLACE); | |
2366 | if (ret >= 0) | |
2367 | return 0; | |
2368 | ||
715d7599 RM |
2369 | /* renameat2() exists since Linux 3.15, btrfs added support for it later. |
2370 | * If it is not implemented, fallback to another method. */ | |
2371 | if (!IN_SET(errno, EINVAL, ENOSYS)) | |
f85ef957 AC |
2372 | return -errno; |
2373 | ||
2374 | /* The link()/unlink() fallback does not work on directories. But | |
2375 | * renameat() without RENAME_NOREPLACE gives the same semantics on | |
2376 | * directories, except when newpath is an *empty* directory. This is | |
2377 | * good enough. */ | |
2378 | ret = fstatat(olddirfd, oldpath, &buf, AT_SYMLINK_NOFOLLOW); | |
2379 | if (ret >= 0 && S_ISDIR(buf.st_mode)) { | |
2380 | ret = renameat(olddirfd, oldpath, newdirfd, newpath); | |
2381 | return ret >= 0 ? 0 : -errno; | |
2382 | } | |
2383 | ||
2384 | /* If it is not a directory, use the link()/unlink() fallback. */ | |
2385 | ret = linkat(olddirfd, oldpath, newdirfd, newpath, 0); | |
2386 | if (ret < 0) | |
2387 | return -errno; | |
2388 | ||
2389 | ret = unlinkat(olddirfd, oldpath, 0); | |
2390 | if (ret < 0) { | |
2391 | /* backup errno before the following unlinkat() alters it */ | |
2392 | ret = errno; | |
2393 | (void) unlinkat(newdirfd, newpath, 0); | |
2394 | errno = ret; | |
2395 | return -errno; | |
2396 | } | |
2397 | ||
2398 | return 0; | |
2399 | } | |
019c7fba | 2400 | |
7b9c9ab8 WC |
2401 | int getxattr_malloc(const char *path, const char *name, char **value, bool allow_symlink) { |
2402 | char *v; | |
2403 | size_t l; | |
2404 | ssize_t n; | |
2405 | ||
2406 | assert(path); | |
2407 | assert(name); | |
2408 | assert(value); | |
2409 | ||
2410 | for (l = 100; ; l = (size_t) n + 1) { | |
2411 | v = new0(char, l); | |
2412 | if (!v) | |
2413 | return -ENOMEM; | |
2414 | ||
2415 | if (allow_symlink) | |
2416 | n = lgetxattr(path, name, v, l); | |
2417 | else | |
2418 | n = getxattr(path, name, v, l); | |
2419 | ||
2420 | if (n >= 0 && (size_t) n < l) { | |
2421 | *value = v; | |
2422 | return n; | |
2423 | } | |
2424 | ||
2425 | free(v); | |
2426 | ||
2427 | if (n < 0 && errno != ERANGE) | |
2428 | return -errno; | |
2429 | ||
2430 | if (allow_symlink) | |
2431 | n = lgetxattr(path, name, NULL, 0); | |
2432 | else | |
2433 | n = getxattr(path, name, NULL, 0); | |
2434 | if (n < 0) | |
2435 | return -errno; | |
2436 | } | |
2437 | } | |
2438 | ||
2439 | int fgetxattr_malloc(int fd, const char *name, char **value) { | |
2440 | char *v; | |
2441 | size_t l; | |
2442 | ssize_t n; | |
2443 | ||
2444 | assert(fd >= 0); | |
2445 | assert(name); | |
2446 | assert(value); | |
2447 | ||
2448 | for (l = 100; ; l = (size_t) n + 1) { | |
2449 | v = new0(char, l); | |
2450 | if (!v) | |
2451 | return -ENOMEM; | |
2452 | ||
2453 | n = fgetxattr(fd, name, v, l); | |
2454 | ||
2455 | if (n >= 0 && (size_t) n < l) { | |
2456 | *value = v; | |
2457 | return n; | |
2458 | } | |
2459 | ||
2460 | free(v); | |
2461 | ||
2462 | if (n < 0 && errno != ERANGE) | |
2463 | return -errno; | |
2464 | ||
2465 | n = fgetxattr(fd, name, NULL, 0); | |
2466 | if (n < 0) | |
2467 | return -errno; | |
2468 | } | |
2469 | } | |
d9603714 | 2470 | |
3f6fd1ba LP |
2471 | int version(void) { |
2472 | puts(PACKAGE_STRING "\n" | |
2473 | SYSTEMD_FEATURES); | |
2474 | return 0; | |
2475 | } | |
8dd4c05b LP |
2476 | |
2477 | bool fdname_is_valid(const char *s) { | |
2478 | const char *p; | |
2479 | ||
0a3bb96e | 2480 | /* Validates a name for $LISTEN_FDNAMES. We basically allow |
8dd4c05b LP |
2481 | * everything ASCII that's not a control character. Also, as |
2482 | * special exception the ":" character is not allowed, as we | |
0a3bb96e | 2483 | * use that as field separator in $LISTEN_FDNAMES. |
8dd4c05b | 2484 | * |
0a3bb96e LP |
2485 | * Note that the empty string is explicitly allowed |
2486 | * here. However, we limit the length of the names to 255 | |
2487 | * characters. */ | |
8dd4c05b LP |
2488 | |
2489 | if (!s) | |
2490 | return false; | |
2491 | ||
2492 | for (p = s; *p; p++) { | |
2493 | if (*p < ' ') | |
2494 | return false; | |
2495 | if (*p >= 127) | |
2496 | return false; | |
2497 | if (*p == ':') | |
2498 | return false; | |
2499 | } | |
2500 | ||
2501 | return p - s < 256; | |
2502 | } | |
257b0719 EV |
2503 | |
2504 | bool oom_score_adjust_is_valid(int oa) { | |
2505 | return oa >= OOM_SCORE_ADJ_MIN && oa <= OOM_SCORE_ADJ_MAX; | |
2506 | } |