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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 | 48 | #include <sys/prctl.h> |
f6c2284a | 49 | #include <sys/stat.h> |
abe4aa14 | 50 | #include <sys/statvfs.h> |
f6c2284a LP |
51 | #include <sys/time.h> |
52 | #include <sys/types.h> | |
53 | #include <sys/utsname.h> | |
54 | #include <sys/vfs.h> | |
55 | #include <sys/wait.h> | |
f6c2284a LP |
56 | #include <syslog.h> |
57 | #include <unistd.h> | |
eef46c37 LP |
58 | |
59 | /* When we include libgen.h because we need dirname() we immediately | |
f6c2284a LP |
60 | * undefine basename() since libgen.h defines it as a macro to the |
61 | * POSIX version which is really broken. We prefer GNU basename(). */ | |
eef46c37 | 62 | #include <libgen.h> |
2b6bf07d | 63 | #undef basename |
60918275 | 64 | |
9bf3b535 LP |
65 | #ifdef HAVE_SYS_AUXV_H |
66 | #include <sys/auxv.h> | |
67 | #endif | |
68 | ||
f6c2284a LP |
69 | /* We include linux/fs.h as last of the system headers, as it |
70 | * otherwise conflicts with sys/mount.h. Yay, Linux is great! */ | |
71 | #include <linux/fs.h> | |
72 | ||
3f6fd1ba | 73 | #include "build.h" |
f6c2284a LP |
74 | #include "def.h" |
75 | #include "device-nodes.h" | |
76 | #include "env-util.h" | |
4f5dd394 | 77 | #include "escape.h" |
f6c2284a | 78 | #include "exit-status.h" |
3ffd4af2 | 79 | #include "fd-util.h" |
f6c2284a LP |
80 | #include "fileio.h" |
81 | #include "formats-util.h" | |
82 | #include "gunicode.h" | |
83 | #include "hashmap.h" | |
84 | #include "hostname-util.h" | |
1dccbe19 | 85 | #include "ioprio.h" |
a9f5d454 | 86 | #include "log.h" |
f6c2284a LP |
87 | #include "macro.h" |
88 | #include "missing.h" | |
c38dfac9 | 89 | #include "mkdir.h" |
e4e73a63 | 90 | #include "hexdecoct.h" |
6bedfcbb | 91 | #include "parse-util.h" |
9eb977db | 92 | #include "path-util.h" |
0b452006 | 93 | #include "process-util.h" |
3df3e884 | 94 | #include "random-util.h" |
24882e06 | 95 | #include "signal-util.h" |
f6c2284a | 96 | #include "sparse-endian.h" |
07630cea | 97 | #include "string-util.h" |
f6c2284a LP |
98 | #include "strv.h" |
99 | #include "terminal-util.h" | |
b1d4f8e1 | 100 | #include "user-util.h" |
f6c2284a | 101 | #include "utf8.h" |
4f5dd394 | 102 | #include "util.h" |
3ffd4af2 | 103 | #include "virt.h" |
a0956174 | 104 | #include "dirent-util.h" |
56cf987f | 105 | |
012d7b42 ZJS |
106 | /* Put this test here for a lack of better place */ |
107 | assert_cc(EAGAIN == EWOULDBLOCK); | |
108 | ||
9a0e6896 LP |
109 | int saved_argc = 0; |
110 | char **saved_argv = NULL; | |
9086e840 | 111 | |
37f85e66 | 112 | size_t page_size(void) { |
ec202eae | 113 | static thread_local size_t pgsz = 0; |
37f85e66 | 114 | long r; |
115 | ||
87d2c1ff | 116 | if (_likely_(pgsz > 0)) |
37f85e66 | 117 | return pgsz; |
118 | ||
e67f47e5 LP |
119 | r = sysconf(_SC_PAGESIZE); |
120 | assert(r > 0); | |
37f85e66 | 121 | |
122 | pgsz = (size_t) r; | |
37f85e66 | 123 | return pgsz; |
124 | } | |
125 | ||
42856c10 | 126 | bool fstype_is_network(const char *fstype) { |
a05f97b3 | 127 | static const char table[] = |
ba89821c | 128 | "afs\0" |
a05f97b3 LP |
129 | "cifs\0" |
130 | "smbfs\0" | |
da92ca5e | 131 | "sshfs\0" |
a05f97b3 | 132 | "ncpfs\0" |
dac70dc7 | 133 | "ncp\0" |
a05f97b3 LP |
134 | "nfs\0" |
135 | "nfs4\0" | |
136 | "gfs\0" | |
67608cad LP |
137 | "gfs2\0" |
138 | "glusterfs\0"; | |
139 | ||
140 | const char *x; | |
141 | ||
142 | x = startswith(fstype, "fuse."); | |
143 | if (x) | |
144 | fstype = x; | |
42856c10 | 145 | |
a05f97b3 | 146 | return nulstr_contains(table, fstype); |
42856c10 LP |
147 | } |
148 | ||
01f78473 | 149 | int dir_is_empty(const char *path) { |
a05f97b3 | 150 | _cleanup_closedir_ DIR *d; |
ac7edd91 | 151 | struct dirent *de; |
01f78473 | 152 | |
a05f97b3 LP |
153 | d = opendir(path); |
154 | if (!d) | |
01f78473 LP |
155 | return -errno; |
156 | ||
ac7edd91 LP |
157 | FOREACH_DIRENT(de, d, return -errno) |
158 | return 0; | |
01f78473 | 159 | |
ac7edd91 | 160 | return 1; |
01f78473 LP |
161 | } |
162 | ||
5b6319dc LP |
163 | void rename_process(const char name[8]) { |
164 | assert(name); | |
165 | ||
5d6b1584 LP |
166 | /* This is a like a poor man's setproctitle(). It changes the |
167 | * comm field, argv[0], and also the glibc's internally used | |
168 | * name of the process. For the first one a limit of 16 chars | |
169 | * applies, to the second one usually one of 10 (i.e. length | |
170 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
171 | * "systemd"). If you pass a longer string it will be | |
172 | * truncated */ | |
5b6319dc | 173 | |
5d6b1584 | 174 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
175 | |
176 | if (program_invocation_name) | |
177 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
178 | |
179 | if (saved_argc > 0) { | |
180 | int i; | |
181 | ||
182 | if (saved_argv[0]) | |
183 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
184 | ||
185 | for (i = 1; i < saved_argc; i++) { | |
186 | if (!saved_argv[i]) | |
187 | break; | |
188 | ||
29804cc1 | 189 | memzero(saved_argv[i], strlen(saved_argv[i])); |
9a0e6896 LP |
190 | } |
191 | } | |
5b6319dc LP |
192 | } |
193 | ||
d1678248 | 194 | bool is_fs_type(const struct statfs *s, statfs_f_type_t magic_value) { |
943aad8c | 195 | assert(s); |
d1678248 ILG |
196 | assert_cc(sizeof(statfs_f_type_t) >= sizeof(s->f_type)); |
197 | ||
198 | return F_TYPE_EQUAL(s->f_type, magic_value); | |
199 | } | |
200 | ||
201 | int fd_check_fstype(int fd, statfs_f_type_t magic_value) { | |
202 | struct statfs s; | |
203 | ||
204 | if (fstatfs(fd, &s) < 0) | |
205 | return -errno; | |
73020ab2 | 206 | |
d1678248 ILG |
207 | return is_fs_type(&s, magic_value); |
208 | } | |
209 | ||
210 | int path_check_fstype(const char *path, statfs_f_type_t magic_value) { | |
211 | _cleanup_close_ int fd = -1; | |
212 | ||
213 | fd = open(path, O_RDONLY); | |
214 | if (fd < 0) | |
215 | return -errno; | |
216 | ||
217 | return fd_check_fstype(fd, magic_value); | |
218 | } | |
219 | ||
220 | bool is_temporary_fs(const struct statfs *s) { | |
221 | return is_fs_type(s, TMPFS_MAGIC) || | |
222 | is_fs_type(s, RAMFS_MAGIC); | |
943aad8c ZJS |
223 | } |
224 | ||
c6878637 | 225 | int fd_is_temporary_fs(int fd) { |
979ef53a DR |
226 | struct statfs s; |
227 | ||
228 | if (fstatfs(fd, &s) < 0) | |
229 | return -errno; | |
230 | ||
231 | return is_temporary_fs(&s); | |
232 | } | |
233 | ||
9d9951a4 HH |
234 | int files_same(const char *filea, const char *fileb) { |
235 | struct stat a, b; | |
b4f10a5e | 236 | |
9d9951a4 | 237 | if (stat(filea, &a) < 0) |
b4f10a5e LP |
238 | return -errno; |
239 | ||
9d9951a4 | 240 | if (stat(fileb, &b) < 0) |
b4f10a5e LP |
241 | return -errno; |
242 | ||
9d9951a4 HH |
243 | return a.st_dev == b.st_dev && |
244 | a.st_ino == b.st_ino; | |
245 | } | |
246 | ||
247 | int running_in_chroot(void) { | |
248 | int ret; | |
249 | ||
250 | ret = files_same("/proc/1/root", "/"); | |
251 | if (ret < 0) | |
252 | return ret; | |
253 | ||
254 | return ret == 0; | |
b4f10a5e LP |
255 | } |
256 | ||
919ce0b7 | 257 | noreturn void freeze(void) { |
720ce21d LP |
258 | |
259 | /* Make sure nobody waits for us on a socket anymore */ | |
260 | close_all_fds(NULL, 0); | |
261 | ||
c29597a1 LP |
262 | sync(); |
263 | ||
3c14d26c LP |
264 | for (;;) |
265 | pause(); | |
266 | } | |
267 | ||
00dc5d76 LP |
268 | bool null_or_empty(struct stat *st) { |
269 | assert(st); | |
270 | ||
271 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
272 | return true; | |
273 | ||
c8f26f42 | 274 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
275 | return true; |
276 | ||
277 | return false; | |
278 | } | |
279 | ||
83096483 LP |
280 | int null_or_empty_path(const char *fn) { |
281 | struct stat st; | |
282 | ||
283 | assert(fn); | |
284 | ||
285 | if (stat(fn, &st) < 0) | |
286 | return -errno; | |
287 | ||
288 | return null_or_empty(&st); | |
289 | } | |
290 | ||
ed88bcfb ZJS |
291 | int null_or_empty_fd(int fd) { |
292 | struct stat st; | |
293 | ||
294 | assert(fd >= 0); | |
295 | ||
296 | if (fstat(fd, &st) < 0) | |
297 | return -errno; | |
298 | ||
299 | return null_or_empty(&st); | |
300 | } | |
301 | ||
e801700e | 302 | static int do_execute(char **directories, usec_t timeout, char *argv[]) { |
49681057 | 303 | _cleanup_hashmap_free_free_ Hashmap *pids = NULL; |
e801700e ZJS |
304 | _cleanup_set_free_free_ Set *seen = NULL; |
305 | char **directory; | |
83cc030f | 306 | |
49681057 ZJS |
307 | /* We fork this all off from a child process so that we can |
308 | * somewhat cleanly make use of SIGALRM to set a time limit */ | |
83cc030f | 309 | |
ce30c8dc LP |
310 | (void) reset_all_signal_handlers(); |
311 | (void) reset_signal_mask(); | |
83cc030f | 312 | |
49681057 | 313 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 314 | |
49681057 ZJS |
315 | pids = hashmap_new(NULL); |
316 | if (!pids) | |
317 | return log_oom(); | |
83cc030f | 318 | |
e801700e ZJS |
319 | seen = set_new(&string_hash_ops); |
320 | if (!seen) | |
321 | return log_oom(); | |
83cc030f | 322 | |
e801700e ZJS |
323 | STRV_FOREACH(directory, directories) { |
324 | _cleanup_closedir_ DIR *d; | |
325 | struct dirent *de; | |
83cc030f | 326 | |
e801700e ZJS |
327 | d = opendir(*directory); |
328 | if (!d) { | |
329 | if (errno == ENOENT) | |
330 | continue; | |
83cc030f | 331 | |
e801700e ZJS |
332 | return log_error_errno(errno, "Failed to open directory %s: %m", *directory); |
333 | } | |
83cc030f | 334 | |
e801700e ZJS |
335 | FOREACH_DIRENT(de, d, break) { |
336 | _cleanup_free_ char *path = NULL; | |
337 | pid_t pid; | |
338 | int r; | |
339 | ||
340 | if (!dirent_is_file(de)) | |
341 | continue; | |
83cc030f | 342 | |
e801700e ZJS |
343 | if (set_contains(seen, de->d_name)) { |
344 | log_debug("%1$s/%2$s skipped (%2$s was already seen).", *directory, de->d_name); | |
345 | continue; | |
346 | } | |
347 | ||
348 | r = set_put_strdup(seen, de->d_name); | |
349 | if (r < 0) | |
350 | return log_oom(); | |
351 | ||
352 | path = strjoin(*directory, "/", de->d_name, NULL); | |
353 | if (!path) | |
354 | return log_oom(); | |
355 | ||
356 | if (null_or_empty_path(path)) { | |
357 | log_debug("%s is empty (a mask).", path); | |
358 | continue; | |
7034e9db | 359 | } |
83cc030f | 360 | |
e801700e ZJS |
361 | pid = fork(); |
362 | if (pid < 0) { | |
363 | log_error_errno(errno, "Failed to fork: %m"); | |
364 | continue; | |
365 | } else if (pid == 0) { | |
366 | char *_argv[2]; | |
83cc030f | 367 | |
e801700e | 368 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 369 | |
e801700e ZJS |
370 | if (!argv) { |
371 | _argv[0] = path; | |
372 | _argv[1] = NULL; | |
373 | argv = _argv; | |
374 | } else | |
375 | argv[0] = path; | |
376 | ||
377 | execv(path, argv); | |
378 | return log_error_errno(errno, "Failed to execute %s: %m", path); | |
379 | } | |
380 | ||
381 | log_debug("Spawned %s as " PID_FMT ".", path, pid); | |
83cc030f | 382 | |
e801700e ZJS |
383 | r = hashmap_put(pids, UINT_TO_PTR(pid), path); |
384 | if (r < 0) | |
385 | return log_oom(); | |
386 | path = NULL; | |
387 | } | |
49681057 | 388 | } |
83cc030f | 389 | |
49681057 ZJS |
390 | /* Abort execution of this process after the timout. We simply |
391 | * rely on SIGALRM as default action terminating the process, | |
392 | * and turn on alarm(). */ | |
83cc030f | 393 | |
49681057 ZJS |
394 | if (timeout != USEC_INFINITY) |
395 | alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC); | |
83cc030f | 396 | |
49681057 ZJS |
397 | while (!hashmap_isempty(pids)) { |
398 | _cleanup_free_ char *path = NULL; | |
399 | pid_t pid; | |
aa62a893 | 400 | |
49681057 ZJS |
401 | pid = PTR_TO_UINT(hashmap_first_key(pids)); |
402 | assert(pid > 0); | |
83cc030f | 403 | |
49681057 ZJS |
404 | path = hashmap_remove(pids, UINT_TO_PTR(pid)); |
405 | assert(path); | |
aa62a893 | 406 | |
49681057 ZJS |
407 | wait_for_terminate_and_warn(path, pid, true); |
408 | } | |
aa62a893 | 409 | |
49681057 ZJS |
410 | return 0; |
411 | } | |
aa62a893 | 412 | |
e801700e | 413 | void execute_directories(const char* const* directories, usec_t timeout, char *argv[]) { |
49681057 ZJS |
414 | pid_t executor_pid; |
415 | int r; | |
e801700e ZJS |
416 | char *name; |
417 | char **dirs = (char**) directories; | |
418 | ||
419 | assert(!strv_isempty(dirs)); | |
83cc030f | 420 | |
e801700e ZJS |
421 | name = basename(dirs[0]); |
422 | assert(!isempty(name)); | |
aa62a893 | 423 | |
e801700e ZJS |
424 | /* Executes all binaries in the directories in parallel and waits |
425 | * for them to finish. Optionally a timeout is applied. If a file | |
426 | * with the same name exists in more than one directory, the | |
427 | * earliest one wins. */ | |
83cc030f | 428 | |
49681057 ZJS |
429 | executor_pid = fork(); |
430 | if (executor_pid < 0) { | |
431 | log_error_errno(errno, "Failed to fork: %m"); | |
432 | return; | |
433 | ||
434 | } else if (executor_pid == 0) { | |
e801700e | 435 | r = do_execute(dirs, timeout, argv); |
49681057 | 436 | _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS); |
aa62a893 | 437 | } |
83cc030f | 438 | |
e801700e | 439 | wait_for_terminate_and_warn(name, executor_pid, true); |
83cc030f LP |
440 | } |
441 | ||
a88c8750 TG |
442 | bool plymouth_running(void) { |
443 | return access("/run/plymouth/pid", F_OK) >= 0; | |
444 | } | |
445 | ||
4d6d6518 LP |
446 | bool display_is_local(const char *display) { |
447 | assert(display); | |
448 | ||
449 | return | |
450 | display[0] == ':' && | |
451 | display[1] >= '0' && | |
452 | display[1] <= '9'; | |
453 | } | |
454 | ||
455 | int socket_from_display(const char *display, char **path) { | |
456 | size_t k; | |
457 | char *f, *c; | |
458 | ||
459 | assert(display); | |
460 | assert(path); | |
461 | ||
462 | if (!display_is_local(display)) | |
463 | return -EINVAL; | |
464 | ||
465 | k = strspn(display+1, "0123456789"); | |
466 | ||
f8294e41 | 467 | f = new(char, strlen("/tmp/.X11-unix/X") + k + 1); |
4d6d6518 LP |
468 | if (!f) |
469 | return -ENOMEM; | |
470 | ||
471 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
472 | memcpy(c, display+1, k); | |
473 | c[k] = 0; | |
474 | ||
475 | *path = f; | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
8092a428 | 480 | int glob_exists(const char *path) { |
7fd1b19b | 481 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 482 | int k; |
8092a428 LP |
483 | |
484 | assert(path); | |
485 | ||
8092a428 LP |
486 | errno = 0; |
487 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
488 | ||
489 | if (k == GLOB_NOMATCH) | |
8d98da3f | 490 | return 0; |
8092a428 | 491 | else if (k == GLOB_NOSPACE) |
8d98da3f | 492 | return -ENOMEM; |
8092a428 | 493 | else if (k == 0) |
8d98da3f | 494 | return !strv_isempty(g.gl_pathv); |
8092a428 | 495 | else |
8d98da3f ZJS |
496 | return errno ? -errno : -EIO; |
497 | } | |
8092a428 | 498 | |
8d98da3f ZJS |
499 | int glob_extend(char ***strv, const char *path) { |
500 | _cleanup_globfree_ glob_t g = {}; | |
501 | int k; | |
502 | char **p; | |
503 | ||
504 | errno = 0; | |
a8ccacf5 | 505 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
506 | |
507 | if (k == GLOB_NOMATCH) | |
508 | return -ENOENT; | |
509 | else if (k == GLOB_NOSPACE) | |
510 | return -ENOMEM; | |
511 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
512 | return errno ? -errno : -EIO; | |
513 | ||
514 | STRV_FOREACH(p, g.gl_pathv) { | |
515 | k = strv_extend(strv, *p); | |
516 | if (k < 0) | |
517 | break; | |
518 | } | |
519 | ||
520 | return k; | |
8092a428 LP |
521 | } |
522 | ||
b636465b | 523 | bool is_main_thread(void) { |
ec202eae | 524 | static thread_local int cached = 0; |
b636465b LP |
525 | |
526 | if (_unlikely_(cached == 0)) | |
527 | cached = getpid() == gettid() ? 1 : -1; | |
528 | ||
529 | return cached > 0; | |
530 | } | |
531 | ||
94959f0f LP |
532 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
533 | char *p, *s; | |
534 | int r; | |
535 | unsigned n, m; | |
536 | ||
537 | assert(ret); | |
538 | ||
539 | /* If it has a queue this is good enough for us */ | |
540 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
541 | return -ENOMEM; | |
542 | ||
543 | r = access(p, F_OK); | |
544 | free(p); | |
545 | ||
546 | if (r >= 0) { | |
547 | *ret = d; | |
548 | return 0; | |
549 | } | |
550 | ||
551 | /* If it is a partition find the originating device */ | |
552 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
553 | return -ENOMEM; | |
554 | ||
555 | r = access(p, F_OK); | |
556 | free(p); | |
557 | ||
558 | if (r < 0) | |
559 | return -ENOENT; | |
560 | ||
561 | /* Get parent dev_t */ | |
562 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
563 | return -ENOMEM; | |
564 | ||
565 | r = read_one_line_file(p, &s); | |
566 | free(p); | |
567 | ||
568 | if (r < 0) | |
569 | return r; | |
570 | ||
571 | r = sscanf(s, "%u:%u", &m, &n); | |
572 | free(s); | |
573 | ||
574 | if (r != 2) | |
575 | return -EINVAL; | |
576 | ||
577 | /* Only return this if it is really good enough for us. */ | |
578 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
579 | return -ENOMEM; | |
580 | ||
581 | r = access(p, F_OK); | |
582 | free(p); | |
583 | ||
584 | if (r >= 0) { | |
585 | *ret = makedev(m, n); | |
586 | return 0; | |
587 | } | |
588 | ||
589 | return -ENOENT; | |
590 | } | |
591 | ||
f41607a6 LP |
592 | static const char *const ioprio_class_table[] = { |
593 | [IOPRIO_CLASS_NONE] = "none", | |
594 | [IOPRIO_CLASS_RT] = "realtime", | |
595 | [IOPRIO_CLASS_BE] = "best-effort", | |
596 | [IOPRIO_CLASS_IDLE] = "idle" | |
597 | }; | |
598 | ||
f8b69d1d | 599 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
600 | |
601 | static const char *const sigchld_code_table[] = { | |
602 | [CLD_EXITED] = "exited", | |
603 | [CLD_KILLED] = "killed", | |
604 | [CLD_DUMPED] = "dumped", | |
605 | [CLD_TRAPPED] = "trapped", | |
606 | [CLD_STOPPED] = "stopped", | |
607 | [CLD_CONTINUED] = "continued", | |
608 | }; | |
609 | ||
610 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
611 | ||
612 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
613 | [LOG_FAC(LOG_KERN)] = "kern", | |
614 | [LOG_FAC(LOG_USER)] = "user", | |
615 | [LOG_FAC(LOG_MAIL)] = "mail", | |
616 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
617 | [LOG_FAC(LOG_AUTH)] = "auth", | |
618 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
619 | [LOG_FAC(LOG_LPR)] = "lpr", | |
620 | [LOG_FAC(LOG_NEWS)] = "news", | |
621 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
622 | [LOG_FAC(LOG_CRON)] = "cron", | |
623 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
624 | [LOG_FAC(LOG_FTP)] = "ftp", | |
625 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
626 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
627 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
628 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
629 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
630 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
631 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
632 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
633 | }; | |
634 | ||
f8b69d1d | 635 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 | 636 | |
adb8ec96 EV |
637 | bool log_facility_unshifted_is_valid(int facility) { |
638 | return facility >= 0 && facility <= LOG_FAC(~0); | |
639 | } | |
640 | ||
f41607a6 LP |
641 | static const char *const log_level_table[] = { |
642 | [LOG_EMERG] = "emerg", | |
643 | [LOG_ALERT] = "alert", | |
644 | [LOG_CRIT] = "crit", | |
645 | [LOG_ERR] = "err", | |
646 | [LOG_WARNING] = "warning", | |
647 | [LOG_NOTICE] = "notice", | |
648 | [LOG_INFO] = "info", | |
649 | [LOG_DEBUG] = "debug" | |
650 | }; | |
651 | ||
f8b69d1d | 652 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 | 653 | |
adb8ec96 EV |
654 | bool log_level_is_valid(int level) { |
655 | return level >= 0 && level <= LOG_DEBUG; | |
656 | } | |
657 | ||
f41607a6 LP |
658 | static const char* const sched_policy_table[] = { |
659 | [SCHED_OTHER] = "other", | |
660 | [SCHED_BATCH] = "batch", | |
661 | [SCHED_IDLE] = "idle", | |
662 | [SCHED_FIFO] = "fifo", | |
663 | [SCHED_RR] = "rr" | |
664 | }; | |
665 | ||
f8b69d1d | 666 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 | 667 | |
65457142 FC |
668 | bool kexec_loaded(void) { |
669 | bool loaded = false; | |
670 | char *s; | |
671 | ||
672 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
673 | if (s[0] == '1') | |
674 | loaded = true; | |
675 | free(s); | |
676 | } | |
677 | return loaded; | |
678 | } | |
fb9de93d | 679 | |
87d2c1ff LP |
680 | int prot_from_flags(int flags) { |
681 | ||
682 | switch (flags & O_ACCMODE) { | |
683 | ||
684 | case O_RDONLY: | |
685 | return PROT_READ; | |
686 | ||
687 | case O_WRONLY: | |
688 | return PROT_WRITE; | |
689 | ||
690 | case O_RDWR: | |
691 | return PROT_READ|PROT_WRITE; | |
692 | ||
693 | default: | |
694 | return -EINVAL; | |
695 | } | |
7c99e0c1 | 696 | } |
689b9a22 | 697 | |
55d7bfc1 LP |
698 | void* memdup(const void *p, size_t l) { |
699 | void *r; | |
700 | ||
701 | assert(p); | |
702 | ||
703 | r = malloc(l); | |
704 | if (!r) | |
705 | return NULL; | |
706 | ||
707 | memcpy(r, p, l); | |
708 | return r; | |
709 | } | |
bb99a35a | 710 | |
9bdc770c | 711 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 | 712 | bool stdout_is_tty, stderr_is_tty; |
8a7c93d8 LP |
713 | pid_t parent_pid, agent_pid; |
714 | sigset_t ss, saved_ss; | |
6bb92a16 LP |
715 | unsigned n, i; |
716 | va_list ap; | |
717 | char **l; | |
718 | ||
719 | assert(pid); | |
720 | assert(path); | |
721 | ||
6bb92a16 LP |
722 | /* Spawns a temporary TTY agent, making sure it goes away when |
723 | * we go away */ | |
724 | ||
8a7c93d8 LP |
725 | parent_pid = getpid(); |
726 | ||
727 | /* First we temporarily block all signals, so that the new | |
728 | * child has them blocked initially. This way, we can be sure | |
729 | * that SIGTERMs are not lost we might send to the agent. */ | |
730 | assert_se(sigfillset(&ss) >= 0); | |
731 | assert_se(sigprocmask(SIG_SETMASK, &ss, &saved_ss) >= 0); | |
732 | ||
6bb92a16 | 733 | agent_pid = fork(); |
8a7c93d8 LP |
734 | if (agent_pid < 0) { |
735 | assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0); | |
6bb92a16 | 736 | return -errno; |
8a7c93d8 | 737 | } |
6bb92a16 LP |
738 | |
739 | if (agent_pid != 0) { | |
8a7c93d8 | 740 | assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0); |
6bb92a16 LP |
741 | *pid = agent_pid; |
742 | return 0; | |
743 | } | |
744 | ||
745 | /* In the child: | |
746 | * | |
747 | * Make sure the agent goes away when the parent dies */ | |
748 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
749 | _exit(EXIT_FAILURE); | |
750 | ||
8a7c93d8 LP |
751 | /* Make sure we actually can kill the agent, if we need to, in |
752 | * case somebody invoked us from a shell script that trapped | |
753 | * SIGTERM or so... */ | |
ce30c8dc LP |
754 | (void) reset_all_signal_handlers(); |
755 | (void) reset_signal_mask(); | |
8a7c93d8 | 756 | |
6bb92a16 | 757 | /* Check whether our parent died before we were able |
8a7c93d8 | 758 | * to set the death signal and unblock the signals */ |
6bb92a16 LP |
759 | if (getppid() != parent_pid) |
760 | _exit(EXIT_SUCCESS); | |
761 | ||
762 | /* Don't leak fds to the agent */ | |
9bdc770c | 763 | close_all_fds(except, n_except); |
6bb92a16 LP |
764 | |
765 | stdout_is_tty = isatty(STDOUT_FILENO); | |
766 | stderr_is_tty = isatty(STDERR_FILENO); | |
767 | ||
768 | if (!stdout_is_tty || !stderr_is_tty) { | |
8a7c93d8 LP |
769 | int fd; |
770 | ||
6bb92a16 LP |
771 | /* Detach from stdout/stderr. and reopen |
772 | * /dev/tty for them. This is important to | |
773 | * ensure that when systemctl is started via | |
774 | * popen() or a similar call that expects to | |
775 | * read EOF we actually do generate EOF and | |
776 | * not delay this indefinitely by because we | |
777 | * keep an unused copy of stdin around. */ | |
778 | fd = open("/dev/tty", O_WRONLY); | |
779 | if (fd < 0) { | |
56f64d95 | 780 | log_error_errno(errno, "Failed to open /dev/tty: %m"); |
6bb92a16 LP |
781 | _exit(EXIT_FAILURE); |
782 | } | |
783 | ||
784 | if (!stdout_is_tty) | |
785 | dup2(fd, STDOUT_FILENO); | |
786 | ||
787 | if (!stderr_is_tty) | |
788 | dup2(fd, STDERR_FILENO); | |
789 | ||
790 | if (fd > 2) | |
791 | close(fd); | |
792 | } | |
793 | ||
794 | /* Count arguments */ | |
795 | va_start(ap, path); | |
796 | for (n = 0; va_arg(ap, char*); n++) | |
797 | ; | |
798 | va_end(ap); | |
799 | ||
800 | /* Allocate strv */ | |
801 | l = alloca(sizeof(char *) * (n + 1)); | |
802 | ||
803 | /* Fill in arguments */ | |
804 | va_start(ap, path); | |
805 | for (i = 0; i <= n; i++) | |
806 | l[i] = va_arg(ap, char*); | |
807 | va_end(ap); | |
808 | ||
809 | execv(path, l); | |
810 | _exit(EXIT_FAILURE); | |
811 | } | |
68faf98c | 812 | |
3d7415f4 LP |
813 | bool http_etag_is_valid(const char *etag) { |
814 | if (isempty(etag)) | |
815 | return false; | |
816 | ||
817 | if (!endswith(etag, "\"")) | |
818 | return false; | |
819 | ||
820 | if (!startswith(etag, "\"") && !startswith(etag, "W/\"")) | |
821 | return false; | |
822 | ||
823 | return true; | |
824 | } | |
825 | ||
a2e03378 LP |
826 | bool http_url_is_valid(const char *url) { |
827 | const char *p; | |
49dbfa7b | 828 | |
a2e03378 LP |
829 | if (isempty(url)) |
830 | return false; | |
49dbfa7b | 831 | |
a2e03378 LP |
832 | p = startswith(url, "http://"); |
833 | if (!p) | |
834 | p = startswith(url, "https://"); | |
835 | if (!p) | |
836 | return false; | |
49dbfa7b | 837 | |
a2e03378 LP |
838 | if (isempty(p)) |
839 | return false; | |
49dbfa7b | 840 | |
a2e03378 LP |
841 | return ascii_is_valid(p); |
842 | } | |
49dbfa7b | 843 | |
a2e03378 LP |
844 | bool documentation_url_is_valid(const char *url) { |
845 | const char *p; | |
846 | ||
847 | if (isempty(url)) | |
848 | return false; | |
849 | ||
850 | if (http_url_is_valid(url)) | |
49dbfa7b LP |
851 | return true; |
852 | ||
a2e03378 LP |
853 | p = startswith(url, "file:/"); |
854 | if (!p) | |
855 | p = startswith(url, "info:"); | |
856 | if (!p) | |
857 | p = startswith(url, "man:"); | |
858 | ||
859 | if (isempty(p)) | |
860 | return false; | |
861 | ||
862 | return ascii_is_valid(p); | |
49dbfa7b | 863 | } |
9be346c9 HH |
864 | |
865 | bool in_initrd(void) { | |
73020ab2 | 866 | static int saved = -1; |
825c6fe5 | 867 | struct statfs s; |
8f33b5b8 | 868 | |
825c6fe5 LP |
869 | if (saved >= 0) |
870 | return saved; | |
871 | ||
872 | /* We make two checks here: | |
873 | * | |
874 | * 1. the flag file /etc/initrd-release must exist | |
875 | * 2. the root file system must be a memory file system | |
876 | * | |
877 | * The second check is extra paranoia, since misdetecting an | |
878 | * initrd can have bad bad consequences due the initrd | |
879 | * emptying when transititioning to the main systemd. | |
880 | */ | |
881 | ||
882 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
883 | statfs("/", &s) >= 0 && | |
943aad8c | 884 | is_temporary_fs(&s); |
9be346c9 | 885 | |
8f33b5b8 | 886 | return saved; |
9be346c9 | 887 | } |
069cfc85 | 888 | |
0b507b17 LP |
889 | bool string_is_safe(const char *p) { |
890 | const char *t; | |
891 | ||
6294aa76 LP |
892 | if (!p) |
893 | return false; | |
0b507b17 LP |
894 | |
895 | for (t = p; *t; t++) { | |
01539d6e | 896 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
897 | return false; |
898 | ||
843f6bf4 | 899 | if (strchr("\\\"\'\x7f", *t)) |
0b507b17 LP |
900 | return false; |
901 | } | |
902 | ||
903 | return true; | |
904 | } | |
cfbc22ab | 905 | |
a9e12476 KS |
906 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
907 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 908 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
909 | size_t l, u, idx; |
910 | const void *p; | |
911 | int comparison; | |
912 | ||
913 | l = 0; | |
914 | u = nmemb; | |
915 | while (l < u) { | |
916 | idx = (l + u) / 2; | |
917 | p = (void *)(((const char *) base) + (idx * size)); | |
918 | comparison = compar(key, p, arg); | |
919 | if (comparison < 0) | |
920 | u = idx; | |
921 | else if (comparison > 0) | |
922 | l = idx + 1; | |
923 | else | |
924 | return (void *)p; | |
925 | } | |
926 | return NULL; | |
927 | } | |
09017585 | 928 | |
20f56fdd DR |
929 | void init_gettext(void) { |
930 | setlocale(LC_ALL, ""); | |
931 | textdomain(GETTEXT_PACKAGE); | |
932 | } | |
933 | ||
09017585 MS |
934 | bool is_locale_utf8(void) { |
935 | const char *set; | |
936 | static int cached_answer = -1; | |
937 | ||
938 | if (cached_answer >= 0) | |
939 | goto out; | |
940 | ||
941 | if (!setlocale(LC_ALL, "")) { | |
942 | cached_answer = true; | |
943 | goto out; | |
944 | } | |
945 | ||
946 | set = nl_langinfo(CODESET); | |
947 | if (!set) { | |
948 | cached_answer = true; | |
949 | goto out; | |
950 | } | |
951 | ||
f168c273 | 952 | if (streq(set, "UTF-8")) { |
fee79e01 HH |
953 | cached_answer = true; |
954 | goto out; | |
955 | } | |
956 | ||
6cf2f1d9 HH |
957 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
958 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
959 | set = setlocale(LC_CTYPE, NULL); |
960 | if (!set) { | |
961 | cached_answer = true; | |
962 | goto out; | |
963 | } | |
964 | ||
6cf2f1d9 HH |
965 | /* Check result, but ignore the result if C was set |
966 | * explicitly. */ | |
967 | cached_answer = | |
9797f89b | 968 | STR_IN_SET(set, "C", "POSIX") && |
6cf2f1d9 HH |
969 | !getenv("LC_ALL") && |
970 | !getenv("LC_CTYPE") && | |
971 | !getenv("LANG"); | |
fee79e01 | 972 | |
09017585 | 973 | out: |
6cf2f1d9 | 974 | return (bool) cached_answer; |
09017585 | 975 | } |
c339d977 MS |
976 | |
977 | const char *draw_special_char(DrawSpecialChar ch) { | |
978 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
6b01f1d3 | 979 | |
c339d977 | 980 | /* UTF-8 */ { |
6b01f1d3 | 981 | [DRAW_TREE_VERTICAL] = "\342\224\202 ", /* │ */ |
45a5ff0d MS |
982 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ |
983 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 984 | [DRAW_TREE_SPACE] = " ", /* */ |
6b01f1d3 LP |
985 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243", /* ‣ */ |
986 | [DRAW_BLACK_CIRCLE] = "\342\227\217", /* ● */ | |
987 | [DRAW_ARROW] = "\342\206\222", /* → */ | |
13f8b8cb | 988 | [DRAW_DASH] = "\342\200\223", /* – */ |
c339d977 | 989 | }, |
6b01f1d3 | 990 | |
c339d977 | 991 | /* ASCII fallback */ { |
6b01f1d3 | 992 | [DRAW_TREE_VERTICAL] = "| ", |
45a5ff0d MS |
993 | [DRAW_TREE_BRANCH] = "|-", |
994 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 995 | [DRAW_TREE_SPACE] = " ", |
6b01f1d3 LP |
996 | [DRAW_TRIANGULAR_BULLET] = ">", |
997 | [DRAW_BLACK_CIRCLE] = "*", | |
998 | [DRAW_ARROW] = "->", | |
13f8b8cb | 999 | [DRAW_DASH] = "-", |
c339d977 MS |
1000 | } |
1001 | }; | |
1002 | ||
1003 | return draw_table[!is_locale_utf8()][ch]; | |
1004 | } | |
409bc9c3 | 1005 | |
240dbaa4 LP |
1006 | int on_ac_power(void) { |
1007 | bool found_offline = false, found_online = false; | |
1008 | _cleanup_closedir_ DIR *d = NULL; | |
1009 | ||
1010 | d = opendir("/sys/class/power_supply"); | |
1011 | if (!d) | |
6d890034 | 1012 | return errno == ENOENT ? true : -errno; |
240dbaa4 LP |
1013 | |
1014 | for (;;) { | |
1015 | struct dirent *de; | |
240dbaa4 LP |
1016 | _cleanup_close_ int fd = -1, device = -1; |
1017 | char contents[6]; | |
1018 | ssize_t n; | |
240dbaa4 | 1019 | |
3fd11280 FW |
1020 | errno = 0; |
1021 | de = readdir(d); | |
1022 | if (!de && errno != 0) | |
1023 | return -errno; | |
240dbaa4 LP |
1024 | |
1025 | if (!de) | |
1026 | break; | |
1027 | ||
a34bf9db | 1028 | if (hidden_file(de->d_name)) |
240dbaa4 LP |
1029 | continue; |
1030 | ||
1031 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
1032 | if (device < 0) { | |
1033 | if (errno == ENOENT || errno == ENOTDIR) | |
1034 | continue; | |
1035 | ||
1036 | return -errno; | |
1037 | } | |
1038 | ||
1039 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
1040 | if (fd < 0) { | |
1041 | if (errno == ENOENT) | |
1042 | continue; | |
1043 | ||
1044 | return -errno; | |
1045 | } | |
1046 | ||
1047 | n = read(fd, contents, sizeof(contents)); | |
1048 | if (n < 0) | |
1049 | return -errno; | |
1050 | ||
1051 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
1052 | continue; | |
1053 | ||
03e334a1 | 1054 | safe_close(fd); |
240dbaa4 LP |
1055 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
1056 | if (fd < 0) { | |
1057 | if (errno == ENOENT) | |
1058 | continue; | |
1059 | ||
1060 | return -errno; | |
1061 | } | |
1062 | ||
1063 | n = read(fd, contents, sizeof(contents)); | |
1064 | if (n < 0) | |
1065 | return -errno; | |
1066 | ||
1067 | if (n != 2 || contents[1] != '\n') | |
1068 | return -EIO; | |
1069 | ||
1070 | if (contents[0] == '1') { | |
1071 | found_online = true; | |
1072 | break; | |
1073 | } else if (contents[0] == '0') | |
1074 | found_offline = true; | |
1075 | else | |
1076 | return -EIO; | |
1077 | } | |
1078 | ||
1079 | return found_online || !found_offline; | |
1080 | } | |
fabe5c0e | 1081 | |
ca2d3784 ZJS |
1082 | void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) { |
1083 | size_t a, newalloc; | |
392d5b37 LP |
1084 | void *q; |
1085 | ||
98088803 | 1086 | assert(p); |
e93c33d4 SL |
1087 | assert(allocated); |
1088 | ||
392d5b37 LP |
1089 | if (*allocated >= need) |
1090 | return *p; | |
1091 | ||
ca2d3784 ZJS |
1092 | newalloc = MAX(need * 2, 64u / size); |
1093 | a = newalloc * size; | |
98088803 LP |
1094 | |
1095 | /* check for overflows */ | |
ca2d3784 | 1096 | if (a < size * need) |
98088803 LP |
1097 | return NULL; |
1098 | ||
392d5b37 LP |
1099 | q = realloc(*p, a); |
1100 | if (!q) | |
1101 | return NULL; | |
1102 | ||
1103 | *p = q; | |
ca2d3784 | 1104 | *allocated = newalloc; |
392d5b37 LP |
1105 | return q; |
1106 | } | |
aa96c6cb | 1107 | |
ca2d3784 | 1108 | void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) { |
98088803 | 1109 | size_t prev; |
4545a231 DH |
1110 | uint8_t *q; |
1111 | ||
98088803 LP |
1112 | assert(p); |
1113 | assert(allocated); | |
1114 | ||
1115 | prev = *allocated; | |
1116 | ||
ca2d3784 | 1117 | q = greedy_realloc(p, allocated, need, size); |
4545a231 DH |
1118 | if (!q) |
1119 | return NULL; | |
1120 | ||
1121 | if (*allocated > prev) | |
ca2d3784 | 1122 | memzero(q + prev * size, (*allocated - prev) * size); |
4545a231 DH |
1123 | |
1124 | return q; | |
1125 | } | |
1126 | ||
aa96c6cb LP |
1127 | bool id128_is_valid(const char *s) { |
1128 | size_t i, l; | |
1129 | ||
1130 | l = strlen(s); | |
1131 | if (l == 32) { | |
1132 | ||
1133 | /* Simple formatted 128bit hex string */ | |
1134 | ||
1135 | for (i = 0; i < l; i++) { | |
1136 | char c = s[i]; | |
1137 | ||
1138 | if (!(c >= '0' && c <= '9') && | |
1139 | !(c >= 'a' && c <= 'z') && | |
1140 | !(c >= 'A' && c <= 'Z')) | |
1141 | return false; | |
1142 | } | |
1143 | ||
1144 | } else if (l == 36) { | |
1145 | ||
1146 | /* Formatted UUID */ | |
1147 | ||
1148 | for (i = 0; i < l; i++) { | |
1149 | char c = s[i]; | |
1150 | ||
1151 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
1152 | if (c != '-') | |
1153 | return false; | |
1154 | } else { | |
1155 | if (!(c >= '0' && c <= '9') && | |
1156 | !(c >= 'a' && c <= 'z') && | |
1157 | !(c >= 'A' && c <= 'Z')) | |
1158 | return false; | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | } else | |
1163 | return false; | |
1164 | ||
1165 | return true; | |
1166 | } | |
7085053a | 1167 | |
74df0fca | 1168 | int shall_restore_state(void) { |
1a299299 | 1169 | _cleanup_free_ char *value = NULL; |
74df0fca | 1170 | int r; |
295edddf | 1171 | |
1a299299 | 1172 | r = get_proc_cmdline_key("systemd.restore_state=", &value); |
74df0fca LP |
1173 | if (r < 0) |
1174 | return r; | |
1a299299 LP |
1175 | if (r == 0) |
1176 | return true; | |
295edddf | 1177 | |
1a299299 | 1178 | return parse_boolean(value) != 0; |
74df0fca LP |
1179 | } |
1180 | ||
1181 | int proc_cmdline(char **ret) { | |
b5884878 | 1182 | assert(ret); |
295edddf | 1183 | |
75f86906 | 1184 | if (detect_container() > 0) |
b5884878 LP |
1185 | return get_process_cmdline(1, 0, false, ret); |
1186 | else | |
1187 | return read_one_line_file("/proc/cmdline", ret); | |
295edddf | 1188 | } |
bc9fd78c | 1189 | |
059cb385 | 1190 | int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) { |
141a79f4 | 1191 | _cleanup_free_ char *line = NULL; |
f32d2db1 | 1192 | const char *p; |
141a79f4 ZJS |
1193 | int r; |
1194 | ||
059cb385 LP |
1195 | assert(parse_item); |
1196 | ||
141a79f4 ZJS |
1197 | r = proc_cmdline(&line); |
1198 | if (r < 0) | |
b5884878 | 1199 | return r; |
141a79f4 | 1200 | |
f32d2db1 LP |
1201 | p = line; |
1202 | for (;;) { | |
1203 | _cleanup_free_ char *word = NULL; | |
1204 | char *value = NULL; | |
141a79f4 | 1205 | |
12ba2c44 | 1206 | r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX); |
f32d2db1 LP |
1207 | if (r < 0) |
1208 | return r; | |
1209 | if (r == 0) | |
1210 | break; | |
141a79f4 | 1211 | |
059cb385 LP |
1212 | /* Filter out arguments that are intended only for the |
1213 | * initrd */ | |
1214 | if (!in_initrd() && startswith(word, "rd.")) | |
1215 | continue; | |
1216 | ||
1217 | value = strchr(word, '='); | |
1218 | if (value) | |
1219 | *(value++) = 0; | |
1220 | ||
1221 | r = parse_item(word, value); | |
1222 | if (r < 0) | |
141a79f4 | 1223 | return r; |
141a79f4 ZJS |
1224 | } |
1225 | ||
1226 | return 0; | |
1227 | } | |
1228 | ||
1a299299 LP |
1229 | int get_proc_cmdline_key(const char *key, char **value) { |
1230 | _cleanup_free_ char *line = NULL, *ret = NULL; | |
1231 | bool found = false; | |
1232 | const char *p; | |
1233 | int r; | |
1234 | ||
1235 | assert(key); | |
1236 | ||
1237 | r = proc_cmdline(&line); | |
1238 | if (r < 0) | |
1239 | return r; | |
1240 | ||
1241 | p = line; | |
1242 | for (;;) { | |
1243 | _cleanup_free_ char *word = NULL; | |
1244 | const char *e; | |
1245 | ||
12ba2c44 | 1246 | r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX); |
1a299299 LP |
1247 | if (r < 0) |
1248 | return r; | |
1249 | if (r == 0) | |
1250 | break; | |
1251 | ||
1252 | /* Filter out arguments that are intended only for the | |
1253 | * initrd */ | |
1254 | if (!in_initrd() && startswith(word, "rd.")) | |
1255 | continue; | |
1256 | ||
1257 | if (value) { | |
1258 | e = startswith(word, key); | |
1259 | if (!e) | |
1260 | continue; | |
1261 | ||
1262 | r = free_and_strdup(&ret, e); | |
1263 | if (r < 0) | |
1264 | return r; | |
1265 | ||
1266 | found = true; | |
1267 | } else { | |
1268 | if (streq(word, key)) | |
1269 | found = true; | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | if (value) { | |
1274 | *value = ret; | |
1275 | ret = NULL; | |
1276 | } | |
1277 | ||
1278 | return found; | |
1279 | ||
1280 | } | |
1281 | ||
bc9fd78c LP |
1282 | int container_get_leader(const char *machine, pid_t *pid) { |
1283 | _cleanup_free_ char *s = NULL, *class = NULL; | |
1284 | const char *p; | |
1285 | pid_t leader; | |
1286 | int r; | |
1287 | ||
1288 | assert(machine); | |
1289 | assert(pid); | |
1290 | ||
b9a8d250 LP |
1291 | if (!machine_name_is_valid(machine)) |
1292 | return -EINVAL; | |
1293 | ||
63c372cb | 1294 | p = strjoina("/run/systemd/machines/", machine); |
bc9fd78c LP |
1295 | r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); |
1296 | if (r == -ENOENT) | |
1297 | return -EHOSTDOWN; | |
1298 | if (r < 0) | |
1299 | return r; | |
1300 | if (!s) | |
1301 | return -EIO; | |
1302 | ||
1303 | if (!streq_ptr(class, "container")) | |
1304 | return -EIO; | |
1305 | ||
1306 | r = parse_pid(s, &leader); | |
1307 | if (r < 0) | |
1308 | return r; | |
1309 | if (leader <= 1) | |
1310 | return -EIO; | |
1311 | ||
1312 | *pid = leader; | |
1313 | return 0; | |
1314 | } | |
1315 | ||
671c3419 RM |
1316 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd) { |
1317 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1, usernsfd = -1; | |
359a06aa | 1318 | int rfd = -1; |
bc9fd78c LP |
1319 | |
1320 | assert(pid >= 0); | |
bc9fd78c | 1321 | |
878cd7e9 LP |
1322 | if (mntns_fd) { |
1323 | const char *mntns; | |
a4475f57 | 1324 | |
878cd7e9 LP |
1325 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
1326 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
1327 | if (mntnsfd < 0) | |
1328 | return -errno; | |
1329 | } | |
bc9fd78c | 1330 | |
878cd7e9 LP |
1331 | if (pidns_fd) { |
1332 | const char *pidns; | |
1333 | ||
1334 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
1335 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
1336 | if (pidnsfd < 0) | |
1337 | return -errno; | |
1338 | } | |
1339 | ||
1340 | if (netns_fd) { | |
1341 | const char *netns; | |
1342 | ||
1343 | netns = procfs_file_alloca(pid, "ns/net"); | |
1344 | netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
1345 | if (netnsfd < 0) | |
1346 | return -errno; | |
1347 | } | |
1348 | ||
671c3419 RM |
1349 | if (userns_fd) { |
1350 | const char *userns; | |
1351 | ||
1352 | userns = procfs_file_alloca(pid, "ns/user"); | |
1353 | usernsfd = open(userns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
1354 | if (usernsfd < 0 && errno != ENOENT) | |
1355 | return -errno; | |
1356 | } | |
1357 | ||
878cd7e9 LP |
1358 | if (root_fd) { |
1359 | const char *root; | |
1360 | ||
1361 | root = procfs_file_alloca(pid, "root"); | |
1362 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
1363 | if (rfd < 0) | |
1364 | return -errno; | |
1365 | } | |
1366 | ||
1367 | if (pidns_fd) | |
1368 | *pidns_fd = pidnsfd; | |
bc9fd78c | 1369 | |
878cd7e9 LP |
1370 | if (mntns_fd) |
1371 | *mntns_fd = mntnsfd; | |
1372 | ||
1373 | if (netns_fd) | |
1374 | *netns_fd = netnsfd; | |
1375 | ||
671c3419 RM |
1376 | if (userns_fd) |
1377 | *userns_fd = usernsfd; | |
1378 | ||
878cd7e9 LP |
1379 | if (root_fd) |
1380 | *root_fd = rfd; | |
1381 | ||
671c3419 | 1382 | pidnsfd = mntnsfd = netnsfd = usernsfd = -1; |
bc9fd78c LP |
1383 | |
1384 | return 0; | |
1385 | } | |
1386 | ||
671c3419 RM |
1387 | int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd) { |
1388 | if (userns_fd >= 0) { | |
1389 | /* Can't setns to your own userns, since then you could | |
1390 | * escalate from non-root to root in your own namespace, so | |
1391 | * check if namespaces equal before attempting to enter. */ | |
1392 | _cleanup_free_ char *userns_fd_path = NULL; | |
1393 | int r; | |
1394 | if (asprintf(&userns_fd_path, "/proc/self/fd/%d", userns_fd) < 0) | |
1395 | return -ENOMEM; | |
1396 | ||
1397 | r = files_same(userns_fd_path, "/proc/self/ns/user"); | |
1398 | if (r < 0) | |
1399 | return r; | |
1400 | if (r) | |
1401 | userns_fd = -1; | |
1402 | } | |
bc9fd78c | 1403 | |
878cd7e9 LP |
1404 | if (pidns_fd >= 0) |
1405 | if (setns(pidns_fd, CLONE_NEWPID) < 0) | |
1406 | return -errno; | |
a4475f57 | 1407 | |
878cd7e9 LP |
1408 | if (mntns_fd >= 0) |
1409 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
1410 | return -errno; | |
bc9fd78c | 1411 | |
878cd7e9 LP |
1412 | if (netns_fd >= 0) |
1413 | if (setns(netns_fd, CLONE_NEWNET) < 0) | |
1414 | return -errno; | |
bc9fd78c | 1415 | |
671c3419 RM |
1416 | if (userns_fd >= 0) |
1417 | if (setns(userns_fd, CLONE_NEWUSER) < 0) | |
1418 | return -errno; | |
1419 | ||
878cd7e9 LP |
1420 | if (root_fd >= 0) { |
1421 | if (fchdir(root_fd) < 0) | |
1422 | return -errno; | |
1423 | ||
1424 | if (chroot(".") < 0) | |
1425 | return -errno; | |
1426 | } | |
bc9fd78c | 1427 | |
b4da6d6b | 1428 | return reset_uid_gid(); |
bc9fd78c | 1429 | } |
bf108e55 | 1430 | |
ac45f971 | 1431 | unsigned long personality_from_string(const char *p) { |
6afc95b7 LP |
1432 | |
1433 | /* Parse a personality specifier. We introduce our own | |
1434 | * identifiers that indicate specific ABIs, rather than just | |
1435 | * hints regarding the register size, since we want to keep | |
1436 | * things open for multiple locally supported ABIs for the | |
1437 | * same register size. We try to reuse the ABI identifiers | |
1438 | * used by libseccomp. */ | |
1439 | ||
1440 | #if defined(__x86_64__) | |
1441 | ||
1442 | if (streq(p, "x86")) | |
1443 | return PER_LINUX32; | |
1444 | ||
1445 | if (streq(p, "x86-64")) | |
1446 | return PER_LINUX; | |
1447 | ||
1448 | #elif defined(__i386__) | |
1449 | ||
1450 | if (streq(p, "x86")) | |
1451 | return PER_LINUX; | |
7517f51e HB |
1452 | |
1453 | #elif defined(__s390x__) | |
1454 | ||
1455 | if (streq(p, "s390")) | |
1456 | return PER_LINUX32; | |
1457 | ||
1458 | if (streq(p, "s390x")) | |
1459 | return PER_LINUX; | |
1460 | ||
1461 | #elif defined(__s390__) | |
1462 | ||
1463 | if (streq(p, "s390")) | |
1464 | return PER_LINUX; | |
6afc95b7 LP |
1465 | #endif |
1466 | ||
050f7277 | 1467 | return PERSONALITY_INVALID; |
6afc95b7 | 1468 | } |
ac45f971 LP |
1469 | |
1470 | const char* personality_to_string(unsigned long p) { | |
1471 | ||
1472 | #if defined(__x86_64__) | |
1473 | ||
1474 | if (p == PER_LINUX32) | |
1475 | return "x86"; | |
1476 | ||
1477 | if (p == PER_LINUX) | |
1478 | return "x86-64"; | |
1479 | ||
1480 | #elif defined(__i386__) | |
1481 | ||
1482 | if (p == PER_LINUX) | |
1483 | return "x86"; | |
7517f51e HB |
1484 | |
1485 | #elif defined(__s390x__) | |
1486 | ||
1487 | if (p == PER_LINUX) | |
1488 | return "s390x"; | |
1489 | ||
1490 | if (p == PER_LINUX32) | |
1491 | return "s390"; | |
1492 | ||
1493 | #elif defined(__s390__) | |
1494 | ||
1495 | if (p == PER_LINUX) | |
1496 | return "s390"; | |
1497 | ||
ac45f971 LP |
1498 | #endif |
1499 | ||
1500 | return NULL; | |
1501 | } | |
1c231f56 LP |
1502 | |
1503 | uint64_t physical_memory(void) { | |
1504 | long mem; | |
1505 | ||
1506 | /* We return this as uint64_t in case we are running as 32bit | |
1507 | * process on a 64bit kernel with huge amounts of memory */ | |
1508 | ||
1509 | mem = sysconf(_SC_PHYS_PAGES); | |
1510 | assert(mem > 0); | |
1511 | ||
1512 | return (uint64_t) mem * (uint64_t) page_size(); | |
1513 | } | |
6db615c1 | 1514 | |
966bff26 | 1515 | int update_reboot_param_file(const char *param) { |
c5220a94 MO |
1516 | int r = 0; |
1517 | ||
1518 | if (param) { | |
4c1fc3e4 | 1519 | r = write_string_file(REBOOT_PARAM_FILE, param, WRITE_STRING_FILE_CREATE); |
c5220a94 | 1520 | if (r < 0) |
e53fc357 | 1521 | return log_error_errno(r, "Failed to write reboot param to "REBOOT_PARAM_FILE": %m"); |
c5220a94 | 1522 | } else |
e53fc357 | 1523 | (void) unlink(REBOOT_PARAM_FILE); |
c5220a94 | 1524 | |
e53fc357 | 1525 | return 0; |
c5220a94 | 1526 | } |
6d313367 | 1527 | |
5261ba90 TT |
1528 | int is_symlink(const char *path) { |
1529 | struct stat info; | |
1530 | ||
1531 | if (lstat(path, &info) < 0) | |
1532 | return -errno; | |
1533 | ||
be57e297 LP |
1534 | return !!S_ISLNK(info.st_mode); |
1535 | } | |
5261ba90 | 1536 | |
be57e297 LP |
1537 | int is_dir(const char* path, bool follow) { |
1538 | struct stat st; | |
d1bddcec | 1539 | int r; |
be57e297 | 1540 | |
d1bddcec LP |
1541 | if (follow) |
1542 | r = stat(path, &st); | |
1543 | else | |
1544 | r = lstat(path, &st); | |
1545 | if (r < 0) | |
1546 | return -errno; | |
be57e297 LP |
1547 | |
1548 | return !!S_ISDIR(st.st_mode); | |
a0627f82 | 1549 | } |
7629889c | 1550 | |
ce5b3ad4 SJ |
1551 | int is_device_node(const char *path) { |
1552 | struct stat info; | |
1553 | ||
1554 | if (lstat(path, &info) < 0) | |
1555 | return -errno; | |
1556 | ||
1557 | return !!(S_ISBLK(info.st_mode) || S_ISCHR(info.st_mode)); | |
1558 | } | |
1559 | ||
3d7415f4 LP |
1560 | int syslog_parse_priority(const char **p, int *priority, bool with_facility) { |
1561 | int a = 0, b = 0, c = 0; | |
1562 | int k; | |
1563 | ||
1564 | assert(p); | |
1565 | assert(*p); | |
1566 | assert(priority); | |
1567 | ||
1568 | if ((*p)[0] != '<') | |
1569 | return 0; | |
1570 | ||
1571 | if (!strchr(*p, '>')) | |
1572 | return 0; | |
1573 | ||
1574 | if ((*p)[2] == '>') { | |
1575 | c = undecchar((*p)[1]); | |
1576 | k = 3; | |
1577 | } else if ((*p)[3] == '>') { | |
1578 | b = undecchar((*p)[1]); | |
1579 | c = undecchar((*p)[2]); | |
1580 | k = 4; | |
1581 | } else if ((*p)[4] == '>') { | |
1582 | a = undecchar((*p)[1]); | |
1583 | b = undecchar((*p)[2]); | |
1584 | c = undecchar((*p)[3]); | |
1585 | k = 5; | |
1586 | } else | |
1587 | return 0; | |
1588 | ||
1589 | if (a < 0 || b < 0 || c < 0 || | |
1590 | (!with_facility && (a || b || c > 7))) | |
1591 | return 0; | |
1592 | ||
1593 | if (with_facility) | |
1594 | *priority = a*100 + b*10 + c; | |
1595 | else | |
1596 | *priority = (*priority & LOG_FACMASK) | c; | |
1597 | ||
1598 | *p += k; | |
1599 | return 1; | |
1600 | } | |
9cad100e BB |
1601 | |
1602 | ssize_t string_table_lookup(const char * const *table, size_t len, const char *key) { | |
1603 | size_t i; | |
1604 | ||
1605 | if (!key) | |
1606 | return -1; | |
1607 | ||
1608 | for (i = 0; i < len; ++i) | |
1609 | if (streq_ptr(table[i], key)) | |
8c721f2b | 1610 | return (ssize_t) i; |
9cad100e BB |
1611 | |
1612 | return -1; | |
1613 | } | |
1c8da044 | 1614 | |
3f6fd1ba LP |
1615 | int version(void) { |
1616 | puts(PACKAGE_STRING "\n" | |
1617 | SYSTEMD_FEATURES); | |
1618 | return 0; | |
1619 | } | |
8dd4c05b LP |
1620 | |
1621 | bool fdname_is_valid(const char *s) { | |
1622 | const char *p; | |
1623 | ||
0a3bb96e | 1624 | /* Validates a name for $LISTEN_FDNAMES. We basically allow |
8dd4c05b LP |
1625 | * everything ASCII that's not a control character. Also, as |
1626 | * special exception the ":" character is not allowed, as we | |
0a3bb96e | 1627 | * use that as field separator in $LISTEN_FDNAMES. |
8dd4c05b | 1628 | * |
0a3bb96e LP |
1629 | * Note that the empty string is explicitly allowed |
1630 | * here. However, we limit the length of the names to 255 | |
1631 | * characters. */ | |
8dd4c05b LP |
1632 | |
1633 | if (!s) | |
1634 | return false; | |
1635 | ||
1636 | for (p = s; *p; p++) { | |
1637 | if (*p < ' ') | |
1638 | return false; | |
1639 | if (*p >= 127) | |
1640 | return false; | |
1641 | if (*p == ':') | |
1642 | return false; | |
1643 | } | |
1644 | ||
1645 | return p - s < 256; | |
1646 | } | |
257b0719 EV |
1647 | |
1648 | bool oom_score_adjust_is_valid(int oa) { | |
1649 | return oa >= OOM_SCORE_ADJ_MIN && oa <= OOM_SCORE_ADJ_MAX; | |
1650 | } |