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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 | ||
60918275 LP |
22 | #include <assert.h> |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
85261803 | 26 | #include <stdlib.h> |
034c6ed7 LP |
27 | #include <signal.h> |
28 | #include <stdio.h> | |
1dccbe19 LP |
29 | #include <syslog.h> |
30 | #include <sched.h> | |
31 | #include <sys/resource.h> | |
ef886c6a | 32 | #include <linux/sched.h> |
a9f5d454 LP |
33 | #include <sys/types.h> |
34 | #include <sys/stat.h> | |
3a0ecb08 | 35 | #include <fcntl.h> |
a0d40ac5 | 36 | #include <dirent.h> |
601f6a1e LP |
37 | #include <sys/ioctl.h> |
38 | #include <linux/vt.h> | |
39 | #include <linux/tiocl.h> | |
80876c20 LP |
40 | #include <termios.h> |
41 | #include <stdarg.h> | |
42 | #include <sys/inotify.h> | |
43 | #include <sys/poll.h> | |
3177a7fa | 44 | #include <ctype.h> |
5b6319dc | 45 | #include <sys/prctl.h> |
ef2f1067 LP |
46 | #include <sys/utsname.h> |
47 | #include <pwd.h> | |
4fd5948e | 48 | #include <netinet/ip.h> |
3fe5e5d4 | 49 | #include <linux/kd.h> |
afea26ad | 50 | #include <dlfcn.h> |
2e78aa99 | 51 | #include <sys/wait.h> |
7948c4df | 52 | #include <sys/time.h> |
8092a428 | 53 | #include <glob.h> |
4b67834e | 54 | #include <grp.h> |
87d2c1ff | 55 | #include <sys/mman.h> |
825c6fe5 | 56 | #include <sys/vfs.h> |
6d313367 | 57 | #include <sys/mount.h> |
825c6fe5 | 58 | #include <linux/magic.h> |
0b507b17 | 59 | #include <limits.h> |
09017585 MS |
60 | #include <langinfo.h> |
61 | #include <locale.h> | |
6afc95b7 | 62 | #include <sys/personality.h> |
844ec79b | 63 | #include <libgen.h> |
2b6bf07d | 64 | #undef basename |
60918275 | 65 | |
9bf3b535 LP |
66 | #ifdef HAVE_SYS_AUXV_H |
67 | #include <sys/auxv.h> | |
68 | #endif | |
69 | ||
60918275 LP |
70 | #include "macro.h" |
71 | #include "util.h" | |
1dccbe19 LP |
72 | #include "ioprio.h" |
73 | #include "missing.h" | |
a9f5d454 | 74 | #include "log.h" |
65d2ebdc | 75 | #include "strv.h" |
e51bc1a2 | 76 | #include "label.h" |
c38dfac9 | 77 | #include "mkdir.h" |
9eb977db | 78 | #include "path-util.h" |
d06dacd0 | 79 | #include "exit-status.h" |
83cc030f | 80 | #include "hashmap.h" |
4d1a6904 | 81 | #include "env-util.h" |
a5c32cff | 82 | #include "fileio.h" |
8f6ce71f | 83 | #include "device-nodes.h" |
f405e86d SL |
84 | #include "utf8.h" |
85 | #include "gunicode.h" | |
295edddf | 86 | #include "virt.h" |
477def80 | 87 | #include "def.h" |
56cf987f | 88 | |
9a0e6896 LP |
89 | int saved_argc = 0; |
90 | char **saved_argv = NULL; | |
9086e840 | 91 | |
28917d7d | 92 | static volatile unsigned cached_columns = 0; |
ed757c0c | 93 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 94 | |
37f85e66 | 95 | size_t page_size(void) { |
ec202eae | 96 | static thread_local size_t pgsz = 0; |
37f85e66 | 97 | long r; |
98 | ||
87d2c1ff | 99 | if (_likely_(pgsz > 0)) |
37f85e66 | 100 | return pgsz; |
101 | ||
e67f47e5 LP |
102 | r = sysconf(_SC_PAGESIZE); |
103 | assert(r > 0); | |
37f85e66 | 104 | |
105 | pgsz = (size_t) r; | |
37f85e66 | 106 | return pgsz; |
107 | } | |
108 | ||
e05797fb LP |
109 | bool streq_ptr(const char *a, const char *b) { |
110 | ||
111 | /* Like streq(), but tries to make sense of NULL pointers */ | |
112 | ||
113 | if (a && b) | |
114 | return streq(a, b); | |
115 | ||
116 | if (!a && !b) | |
117 | return true; | |
118 | ||
119 | return false; | |
120 | } | |
121 | ||
8c7c140f | 122 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
123 | size_t sl, pl; |
124 | ||
125 | assert(s); | |
126 | assert(postfix); | |
127 | ||
128 | sl = strlen(s); | |
129 | pl = strlen(postfix); | |
130 | ||
d4d0d4db | 131 | if (pl == 0) |
8c7c140f | 132 | return (char*) s + sl; |
d4d0d4db | 133 | |
60918275 | 134 | if (sl < pl) |
8c7c140f LP |
135 | return NULL; |
136 | ||
137 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
138 | return NULL; | |
60918275 | 139 | |
8c7c140f | 140 | return (char*) s + sl - pl; |
60918275 LP |
141 | } |
142 | ||
79d6d816 LP |
143 | bool first_word(const char *s, const char *word) { |
144 | size_t sl, wl; | |
145 | ||
146 | assert(s); | |
147 | assert(word); | |
148 | ||
149 | sl = strlen(s); | |
150 | wl = strlen(word); | |
151 | ||
152 | if (sl < wl) | |
153 | return false; | |
154 | ||
d4d0d4db LP |
155 | if (wl == 0) |
156 | return true; | |
157 | ||
79d6d816 LP |
158 | if (memcmp(s, word, wl) != 0) |
159 | return false; | |
160 | ||
d4d0d4db LP |
161 | return s[wl] == 0 || |
162 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
163 | } |
164 | ||
42f4e3c4 | 165 | int close_nointr(int fd) { |
b0ee8068 | 166 | int r; |
60918275 | 167 | |
b0ee8068 CW |
168 | assert(fd >= 0); |
169 | r = close(fd); | |
d96ea504 | 170 | if (r >= 0) |
b0ee8068 | 171 | return r; |
d96ea504 LP |
172 | else if (errno == EINTR) |
173 | /* | |
174 | * Just ignore EINTR; a retry loop is the wrong | |
175 | * thing to do on Linux. | |
176 | * | |
177 | * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html | |
178 | * https://bugzilla.gnome.org/show_bug.cgi?id=682819 | |
179 | * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR | |
180 | * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain | |
181 | */ | |
182 | return 0; | |
b0ee8068 CW |
183 | else |
184 | return -errno; | |
60918275 | 185 | } |
85261803 | 186 | |
03e334a1 LP |
187 | int safe_close(int fd) { |
188 | ||
189 | /* | |
190 | * Like close_nointr() but cannot fail. Guarantees errno is | |
191 | * unchanged. Is a NOP with negative fds passed, and returns | |
192 | * -1, so that it can be used in this syntax: | |
193 | * | |
194 | * fd = safe_close(fd); | |
195 | */ | |
85f136b5 | 196 | |
03e334a1 LP |
197 | if (fd >= 0) { |
198 | PROTECT_ERRNO; | |
d96ea504 LP |
199 | |
200 | /* The kernel might return pretty much any error code | |
201 | * via close(), but the fd will be closed anyway. The | |
202 | * only condition we want to check for here is whether | |
203 | * the fd was invalid at all... */ | |
204 | ||
205 | assert_se(close_nointr(fd) != -EBADF); | |
03e334a1 | 206 | } |
85f136b5 | 207 | |
03e334a1 | 208 | return -1; |
85f136b5 LP |
209 | } |
210 | ||
5b6319dc LP |
211 | void close_many(const int fds[], unsigned n_fd) { |
212 | unsigned i; | |
213 | ||
2c93b4ef LP |
214 | assert(fds || n_fd <= 0); |
215 | ||
5b6319dc | 216 | for (i = 0; i < n_fd; i++) |
03e334a1 | 217 | safe_close(fds[i]); |
5b6319dc LP |
218 | } |
219 | ||
4b73a0c0 LP |
220 | int unlink_noerrno(const char *path) { |
221 | PROTECT_ERRNO; | |
222 | int r; | |
223 | ||
224 | r = unlink(path); | |
225 | if (r < 0) | |
226 | return -errno; | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
85261803 LP |
231 | int parse_boolean(const char *v) { |
232 | assert(v); | |
233 | ||
0f625d0b | 234 | if (streq(v, "1") || strcaseeq(v, "yes") || strcaseeq(v, "y") || strcaseeq(v, "true") || strcaseeq(v, "t") || strcaseeq(v, "on")) |
85261803 | 235 | return 1; |
0f625d0b | 236 | else if (streq(v, "0") || strcaseeq(v, "no") || strcaseeq(v, "n") || strcaseeq(v, "false") || strcaseeq(v, "f") || strcaseeq(v, "off")) |
85261803 LP |
237 | return 0; |
238 | ||
239 | return -EINVAL; | |
240 | } | |
241 | ||
3ba686c1 | 242 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 243 | unsigned long ul = 0; |
3ba686c1 LP |
244 | pid_t pid; |
245 | int r; | |
246 | ||
247 | assert(s); | |
248 | assert(ret_pid); | |
249 | ||
e67f47e5 LP |
250 | r = safe_atolu(s, &ul); |
251 | if (r < 0) | |
3ba686c1 LP |
252 | return r; |
253 | ||
254 | pid = (pid_t) ul; | |
255 | ||
256 | if ((unsigned long) pid != ul) | |
257 | return -ERANGE; | |
258 | ||
259 | if (pid <= 0) | |
260 | return -ERANGE; | |
261 | ||
262 | *ret_pid = pid; | |
263 | return 0; | |
264 | } | |
265 | ||
034a2a52 LP |
266 | int parse_uid(const char *s, uid_t* ret_uid) { |
267 | unsigned long ul = 0; | |
268 | uid_t uid; | |
269 | int r; | |
270 | ||
271 | assert(s); | |
272 | assert(ret_uid); | |
273 | ||
e67f47e5 LP |
274 | r = safe_atolu(s, &ul); |
275 | if (r < 0) | |
034a2a52 LP |
276 | return r; |
277 | ||
278 | uid = (uid_t) ul; | |
279 | ||
280 | if ((unsigned long) uid != ul) | |
281 | return -ERANGE; | |
282 | ||
306a55c8 LP |
283 | /* Some libc APIs use (uid_t) -1 as special placeholder */ |
284 | if (uid == (uid_t) 0xFFFFFFFF) | |
f841a154 | 285 | return -ENXIO; |
306a55c8 | 286 | |
6afeb1cf | 287 | /* A long time ago UIDs where 16bit, hence explicitly avoid the 16bit -1 too */ |
306a55c8 | 288 | if (uid == (uid_t) 0xFFFF) |
f841a154 | 289 | return -ENXIO; |
306a55c8 | 290 | |
034a2a52 LP |
291 | *ret_uid = uid; |
292 | return 0; | |
293 | } | |
294 | ||
85261803 LP |
295 | int safe_atou(const char *s, unsigned *ret_u) { |
296 | char *x = NULL; | |
034c6ed7 | 297 | unsigned long l; |
85261803 LP |
298 | |
299 | assert(s); | |
300 | assert(ret_u); | |
301 | ||
302 | errno = 0; | |
303 | l = strtoul(s, &x, 0); | |
304 | ||
f3910003 | 305 | if (!x || x == s || *x || errno) |
48deb058 | 306 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 307 | |
034c6ed7 | 308 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
309 | return -ERANGE; |
310 | ||
311 | *ret_u = (unsigned) l; | |
312 | return 0; | |
313 | } | |
314 | ||
315 | int safe_atoi(const char *s, int *ret_i) { | |
316 | char *x = NULL; | |
034c6ed7 | 317 | long l; |
85261803 LP |
318 | |
319 | assert(s); | |
320 | assert(ret_i); | |
321 | ||
322 | errno = 0; | |
323 | l = strtol(s, &x, 0); | |
324 | ||
f3910003 | 325 | if (!x || x == s || *x || errno) |
48deb058 | 326 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 327 | |
034c6ed7 | 328 | if ((long) (int) l != l) |
85261803 LP |
329 | return -ERANGE; |
330 | ||
034c6ed7 LP |
331 | *ret_i = (int) l; |
332 | return 0; | |
333 | } | |
334 | ||
034c6ed7 LP |
335 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
336 | char *x = NULL; | |
337 | unsigned long long l; | |
338 | ||
339 | assert(s); | |
340 | assert(ret_llu); | |
341 | ||
342 | errno = 0; | |
343 | l = strtoull(s, &x, 0); | |
344 | ||
f3910003 | 345 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
346 | return errno ? -errno : -EINVAL; |
347 | ||
348 | *ret_llu = l; | |
349 | return 0; | |
350 | } | |
351 | ||
352 | int safe_atolli(const char *s, long long int *ret_lli) { | |
353 | char *x = NULL; | |
354 | long long l; | |
355 | ||
356 | assert(s); | |
357 | assert(ret_lli); | |
358 | ||
359 | errno = 0; | |
360 | l = strtoll(s, &x, 0); | |
361 | ||
f3910003 | 362 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
363 | return errno ? -errno : -EINVAL; |
364 | ||
365 | *ret_lli = l; | |
85261803 LP |
366 | return 0; |
367 | } | |
a41e8209 | 368 | |
f7900e25 TA |
369 | int safe_atod(const char *s, double *ret_d) { |
370 | char *x = NULL; | |
32b2634e | 371 | double d = 0; |
f7900e25 TA |
372 | |
373 | assert(s); | |
374 | assert(ret_d); | |
375 | ||
d6dd604b LP |
376 | RUN_WITH_LOCALE(LC_NUMERIC_MASK, "C") { |
377 | errno = 0; | |
378 | d = strtod(s, &x); | |
379 | } | |
f7900e25 TA |
380 | |
381 | if (!x || x == s || *x || errno) | |
382 | return errno ? -errno : -EINVAL; | |
383 | ||
384 | *ret_d = (double) d; | |
385 | return 0; | |
386 | } | |
387 | ||
bf85c24d SP |
388 | static size_t strcspn_escaped(const char *s, const char *reject) { |
389 | bool escaped = false; | |
390 | size_t n; | |
391 | ||
392 | for (n=0; s[n]; n++) { | |
393 | if (escaped) | |
394 | escaped = false; | |
395 | else if (s[n] == '\\') | |
396 | escaped = true; | |
397 | else if (strchr(reject, s[n])) | |
398 | return n; | |
399 | } | |
400 | return n; | |
401 | } | |
402 | ||
a41e8209 | 403 | /* Split a string into words. */ |
bf85c24d | 404 | char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state) { |
a41e8209 LP |
405 | char *current; |
406 | ||
407 | current = *state ? *state : (char*) c; | |
408 | ||
409 | if (!*current || *c == 0) | |
410 | return NULL; | |
411 | ||
65d2ebdc | 412 | current += strspn(current, separator); |
bf85c24d | 413 | if (!*current) |
70f75a52 LP |
414 | return NULL; |
415 | ||
bf85c24d SP |
416 | if (quoted && strchr("\'\"", *current)) { |
417 | char quotechar = *(current++); | |
418 | *l = strcspn_escaped(current, (char[]){quotechar, '\0'}); | |
419 | *state = current+*l+1; | |
420 | } else if (quoted) { | |
421 | *l = strcspn_escaped(current, separator); | |
422 | *state = current+*l; | |
034c6ed7 | 423 | } else { |
bf85c24d SP |
424 | *l = strcspn(current, separator); |
425 | *state = current+*l; | |
034c6ed7 LP |
426 | } |
427 | ||
5b12334d | 428 | return (char*) current; |
034c6ed7 LP |
429 | } |
430 | ||
034c6ed7 LP |
431 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
432 | int r; | |
b4696bce | 433 | _cleanup_free_ char *line = NULL; |
bb00e604 | 434 | long unsigned ppid; |
49aa47c7 | 435 | const char *p; |
034c6ed7 | 436 | |
49aa47c7 | 437 | assert(pid >= 0); |
034c6ed7 LP |
438 | assert(_ppid); |
439 | ||
49aa47c7 LP |
440 | if (pid == 0) { |
441 | *_ppid = getppid(); | |
442 | return 0; | |
443 | } | |
034c6ed7 | 444 | |
49aa47c7 | 445 | p = procfs_file_alloca(pid, "stat"); |
b4696bce SP |
446 | r = read_one_line_file(p, &line); |
447 | if (r < 0) | |
034c6ed7 | 448 | return r; |
034c6ed7 | 449 | |
034c6ed7 LP |
450 | /* Let's skip the pid and comm fields. The latter is enclosed |
451 | * in () but does not escape any () in its value, so let's | |
452 | * skip over it manually */ | |
453 | ||
2fbe635a LP |
454 | p = strrchr(line, ')'); |
455 | if (!p) | |
034c6ed7 LP |
456 | return -EIO; |
457 | ||
458 | p++; | |
459 | ||
460 | if (sscanf(p, " " | |
461 | "%*c " /* state */ | |
bb00e604 | 462 | "%lu ", /* ppid */ |
034c6ed7 LP |
463 | &ppid) != 1) |
464 | return -EIO; | |
465 | ||
bb00e604 | 466 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
467 | return -ERANGE; |
468 | ||
469 | *_ppid = (pid_t) ppid; | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
7640a5de | 474 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
b4696bce SP |
475 | int r; |
476 | _cleanup_free_ char *line = NULL; | |
49aa47c7 | 477 | const char *p; |
7640a5de | 478 | |
49aa47c7 | 479 | assert(pid >= 0); |
7640a5de LP |
480 | assert(st); |
481 | ||
b68fa010 | 482 | p = procfs_file_alloca(pid, "stat"); |
b4696bce SP |
483 | r = read_one_line_file(p, &line); |
484 | if (r < 0) | |
485 | return r; | |
7640a5de LP |
486 | |
487 | /* Let's skip the pid and comm fields. The latter is enclosed | |
488 | * in () but does not escape any () in its value, so let's | |
489 | * skip over it manually */ | |
490 | ||
e67f47e5 LP |
491 | p = strrchr(line, ')'); |
492 | if (!p) | |
7640a5de LP |
493 | return -EIO; |
494 | ||
495 | p++; | |
496 | ||
497 | if (sscanf(p, " " | |
498 | "%*c " /* state */ | |
499 | "%*d " /* ppid */ | |
500 | "%*d " /* pgrp */ | |
501 | "%*d " /* session */ | |
502 | "%*d " /* tty_nr */ | |
503 | "%*d " /* tpgid */ | |
504 | "%*u " /* flags */ | |
505 | "%*u " /* minflt */ | |
506 | "%*u " /* cminflt */ | |
507 | "%*u " /* majflt */ | |
508 | "%*u " /* cmajflt */ | |
509 | "%*u " /* utime */ | |
510 | "%*u " /* stime */ | |
511 | "%*d " /* cutime */ | |
512 | "%*d " /* cstime */ | |
513 | "%*d " /* priority */ | |
514 | "%*d " /* nice */ | |
515 | "%*d " /* num_threads */ | |
516 | "%*d " /* itrealvalue */ | |
517 | "%llu " /* starttime */, | |
518 | st) != 1) | |
519 | return -EIO; | |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
34ca941c LP |
524 | int fchmod_umask(int fd, mode_t m) { |
525 | mode_t u; | |
526 | int r; | |
527 | ||
528 | u = umask(0777); | |
529 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
530 | umask(u); | |
531 | ||
532 | return r; | |
533 | } | |
534 | ||
7072ced8 LP |
535 | char *truncate_nl(char *s) { |
536 | assert(s); | |
537 | ||
538 | s[strcspn(s, NEWLINE)] = 0; | |
539 | return s; | |
540 | } | |
541 | ||
93b5eaec | 542 | int get_process_state(pid_t pid) { |
e10c9985 YS |
543 | const char *p; |
544 | char state; | |
545 | int r; | |
546 | _cleanup_free_ char *line = NULL; | |
547 | ||
548 | assert(pid >= 0); | |
549 | ||
550 | p = procfs_file_alloca(pid, "stat"); | |
551 | r = read_one_line_file(p, &line); | |
552 | if (r < 0) | |
553 | return r; | |
554 | ||
555 | p = strrchr(line, ')'); | |
556 | if (!p) | |
557 | return -EIO; | |
558 | ||
559 | p++; | |
560 | ||
561 | if (sscanf(p, " %c", &state) != 1) | |
562 | return -EIO; | |
563 | ||
564 | return (unsigned char) state; | |
565 | } | |
566 | ||
87d2c1ff | 567 | int get_process_comm(pid_t pid, char **name) { |
49aa47c7 | 568 | const char *p; |
5b12334d | 569 | int r; |
7072ced8 | 570 | |
7072ced8 | 571 | assert(name); |
49aa47c7 | 572 | assert(pid >= 0); |
7072ced8 | 573 | |
b68fa010 | 574 | p = procfs_file_alloca(pid, "comm"); |
7072ced8 | 575 | |
5b12334d LP |
576 | r = read_one_line_file(p, name); |
577 | if (r == -ENOENT) | |
578 | return -ESRCH; | |
579 | ||
580 | return r; | |
7072ced8 LP |
581 | } |
582 | ||
87d2c1ff | 583 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
49aa47c7 | 584 | _cleanup_fclose_ FILE *f = NULL; |
9bdbc2e2 | 585 | char *r = NULL, *k; |
49aa47c7 | 586 | const char *p; |
c59760ee | 587 | int c; |
c59760ee | 588 | |
c59760ee | 589 | assert(line); |
49aa47c7 | 590 | assert(pid >= 0); |
c59760ee | 591 | |
b68fa010 | 592 | p = procfs_file_alloca(pid, "cmdline"); |
c59760ee | 593 | |
49aa47c7 | 594 | f = fopen(p, "re"); |
c59760ee LP |
595 | if (!f) |
596 | return -errno; | |
49aa47c7 | 597 | |
9bdbc2e2 | 598 | if (max_length == 0) { |
49aa47c7 LP |
599 | size_t len = 0, allocated = 0; |
600 | ||
9bdbc2e2 | 601 | while ((c = getc(f)) != EOF) { |
49aa47c7 LP |
602 | |
603 | if (!GREEDY_REALLOC(r, allocated, len+2)) { | |
9bdbc2e2 | 604 | free(r); |
9bdbc2e2 LN |
605 | return -ENOMEM; |
606 | } | |
49aa47c7 LP |
607 | |
608 | r[len++] = isprint(c) ? c : ' '; | |
9bdbc2e2 | 609 | } |
49aa47c7 LP |
610 | |
611 | if (len > 0) | |
612 | r[len-1] = 0; | |
613 | ||
9bdbc2e2 LN |
614 | } else { |
615 | bool space = false; | |
616 | size_t left; | |
49aa47c7 | 617 | |
9bdbc2e2 | 618 | r = new(char, max_length); |
49aa47c7 | 619 | if (!r) |
9bdbc2e2 | 620 | return -ENOMEM; |
c59760ee | 621 | |
9bdbc2e2 LN |
622 | k = r; |
623 | left = max_length; | |
624 | while ((c = getc(f)) != EOF) { | |
c59760ee | 625 | |
9bdbc2e2 LN |
626 | if (isprint(c)) { |
627 | if (space) { | |
628 | if (left <= 4) | |
629 | break; | |
630 | ||
631 | *(k++) = ' '; | |
632 | left--; | |
633 | space = false; | |
634 | } | |
c59760ee | 635 | |
c59760ee LP |
636 | if (left <= 4) |
637 | break; | |
638 | ||
9bdbc2e2 | 639 | *(k++) = (char) c; |
057fbb58 | 640 | left--; |
9bdbc2e2 LN |
641 | } else |
642 | space = true; | |
643 | } | |
c59760ee | 644 | |
9bdbc2e2 LN |
645 | if (left <= 4) { |
646 | size_t n = MIN(left-1, 3U); | |
647 | memcpy(k, "...", n); | |
648 | k[n] = 0; | |
649 | } else | |
650 | *k = 0; | |
c59760ee LP |
651 | } |
652 | ||
35d2e7ec | 653 | /* Kernel threads have no argv[] */ |
9bdbc2e2 | 654 | if (r == NULL || r[0] == 0) { |
b47d419c | 655 | _cleanup_free_ char *t = NULL; |
35d2e7ec LP |
656 | int h; |
657 | ||
658 | free(r); | |
659 | ||
87d2c1ff LP |
660 | if (!comm_fallback) |
661 | return -ENOENT; | |
662 | ||
663 | h = get_process_comm(pid, &t); | |
664 | if (h < 0) | |
35d2e7ec LP |
665 | return h; |
666 | ||
b7def684 | 667 | r = strjoin("[", t, "]", NULL); |
87d2c1ff | 668 | if (!r) |
35d2e7ec LP |
669 | return -ENOMEM; |
670 | } | |
fa776d8e | 671 | |
c59760ee LP |
672 | *line = r; |
673 | return 0; | |
674 | } | |
675 | ||
1e5678d0 | 676 | int is_kernel_thread(pid_t pid) { |
49aa47c7 | 677 | const char *p; |
1e5678d0 LP |
678 | size_t count; |
679 | char c; | |
680 | bool eof; | |
681 | FILE *f; | |
682 | ||
683 | if (pid == 0) | |
684 | return 0; | |
685 | ||
49aa47c7 | 686 | assert(pid > 0); |
1e5678d0 | 687 | |
49aa47c7 LP |
688 | p = procfs_file_alloca(pid, "cmdline"); |
689 | f = fopen(p, "re"); | |
1e5678d0 LP |
690 | if (!f) |
691 | return -errno; | |
692 | ||
693 | count = fread(&c, 1, 1, f); | |
694 | eof = feof(f); | |
695 | fclose(f); | |
696 | ||
697 | /* Kernel threads have an empty cmdline */ | |
698 | ||
699 | if (count <= 0) | |
700 | return eof ? 1 : -errno; | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
3a832116 SL |
705 | int get_process_capeff(pid_t pid, char **capeff) { |
706 | const char *p; | |
3a832116 SL |
707 | |
708 | assert(capeff); | |
709 | assert(pid >= 0); | |
710 | ||
b68fa010 | 711 | p = procfs_file_alloca(pid, "status"); |
3a832116 | 712 | |
69ab8088 | 713 | return get_status_field(p, "\nCapEff:", capeff); |
3a832116 | 714 | } |
49aa47c7 | 715 | |
87d2c1ff | 716 | int get_process_exe(pid_t pid, char **name) { |
49aa47c7 | 717 | const char *p; |
e79f68d1 ZJS |
718 | char *d; |
719 | int r; | |
87d2c1ff | 720 | |
49aa47c7 | 721 | assert(pid >= 0); |
87d2c1ff LP |
722 | assert(name); |
723 | ||
b68fa010 | 724 | p = procfs_file_alloca(pid, "exe"); |
87d2c1ff | 725 | |
e79f68d1 ZJS |
726 | r = readlink_malloc(p, name); |
727 | if (r < 0) | |
5b12334d | 728 | return r == -ENOENT ? -ESRCH : r; |
e79f68d1 ZJS |
729 | |
730 | d = endswith(*name, " (deleted)"); | |
731 | if (d) | |
732 | *d = '\0'; | |
733 | ||
734 | return 0; | |
87d2c1ff LP |
735 | } |
736 | ||
901c3d0d | 737 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
f74e605f | 738 | _cleanup_fclose_ FILE *f = NULL; |
9db11a99 | 739 | char line[LINE_MAX]; |
49aa47c7 | 740 | const char *p; |
7e4ab3c5 | 741 | |
f74e605f | 742 | assert(field); |
7e4ab3c5 LP |
743 | assert(uid); |
744 | ||
745 | if (pid == 0) | |
746 | return getuid(); | |
747 | ||
49aa47c7 LP |
748 | p = procfs_file_alloca(pid, "status"); |
749 | f = fopen(p, "re"); | |
7e4ab3c5 LP |
750 | if (!f) |
751 | return -errno; | |
752 | ||
9db11a99 | 753 | FOREACH_LINE(line, f, return -errno) { |
f74e605f | 754 | char *l; |
7e4ab3c5 LP |
755 | |
756 | l = strstrip(line); | |
757 | ||
901c3d0d LP |
758 | if (startswith(l, field)) { |
759 | l += strlen(field); | |
7e4ab3c5 LP |
760 | l += strspn(l, WHITESPACE); |
761 | ||
762 | l[strcspn(l, WHITESPACE)] = 0; | |
763 | ||
f74e605f | 764 | return parse_uid(l, uid); |
7e4ab3c5 LP |
765 | } |
766 | } | |
767 | ||
f74e605f | 768 | return -EIO; |
7e4ab3c5 LP |
769 | } |
770 | ||
901c3d0d LP |
771 | int get_process_uid(pid_t pid, uid_t *uid) { |
772 | return get_process_id(pid, "Uid:", uid); | |
773 | } | |
774 | ||
775 | int get_process_gid(pid_t pid, gid_t *gid) { | |
49aa47c7 | 776 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); |
901c3d0d LP |
777 | return get_process_id(pid, "Gid:", gid); |
778 | } | |
779 | ||
fab56fc5 LP |
780 | char *strnappend(const char *s, const char *suffix, size_t b) { |
781 | size_t a; | |
44d8db9e LP |
782 | char *r; |
783 | ||
fab56fc5 LP |
784 | if (!s && !suffix) |
785 | return strdup(""); | |
786 | ||
787 | if (!s) | |
788 | return strndup(suffix, b); | |
789 | ||
790 | if (!suffix) | |
791 | return strdup(s); | |
792 | ||
44d8db9e LP |
793 | assert(s); |
794 | assert(suffix); | |
795 | ||
796 | a = strlen(s); | |
aa408e77 | 797 | if (b > ((size_t) -1) - a) |
040f18ea | 798 | return NULL; |
44d8db9e | 799 | |
040f18ea LP |
800 | r = new(char, a+b+1); |
801 | if (!r) | |
44d8db9e LP |
802 | return NULL; |
803 | ||
804 | memcpy(r, s, a); | |
805 | memcpy(r+a, suffix, b); | |
806 | r[a+b] = 0; | |
807 | ||
808 | return r; | |
809 | } | |
87f0e418 | 810 | |
fab56fc5 LP |
811 | char *strappend(const char *s, const char *suffix) { |
812 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
813 | } | |
814 | ||
849958d1 | 815 | int readlinkat_malloc(int fd, const char *p, char **ret) { |
87f0e418 | 816 | size_t l = 100; |
2d2ebd6b | 817 | int r; |
87f0e418 LP |
818 | |
819 | assert(p); | |
2d2ebd6b | 820 | assert(ret); |
87f0e418 LP |
821 | |
822 | for (;;) { | |
823 | char *c; | |
824 | ssize_t n; | |
825 | ||
2d2ebd6b LP |
826 | c = new(char, l); |
827 | if (!c) | |
87f0e418 LP |
828 | return -ENOMEM; |
829 | ||
849958d1 | 830 | n = readlinkat(fd, p, c, l-1); |
2d2ebd6b LP |
831 | if (n < 0) { |
832 | r = -errno; | |
87f0e418 | 833 | free(c); |
2d2ebd6b | 834 | return r; |
87f0e418 LP |
835 | } |
836 | ||
837 | if ((size_t) n < l-1) { | |
838 | c[n] = 0; | |
2d2ebd6b | 839 | *ret = c; |
87f0e418 LP |
840 | return 0; |
841 | } | |
842 | ||
843 | free(c); | |
844 | l *= 2; | |
845 | } | |
846 | } | |
847 | ||
849958d1 LP |
848 | int readlink_malloc(const char *p, char **ret) { |
849 | return readlinkat_malloc(AT_FDCWD, p, ret); | |
850 | } | |
851 | ||
2c7108c4 | 852 | int readlink_and_make_absolute(const char *p, char **r) { |
1058cbf2 ZJS |
853 | _cleanup_free_ char *target = NULL; |
854 | char *k; | |
2c7108c4 LP |
855 | int j; |
856 | ||
857 | assert(p); | |
858 | assert(r); | |
859 | ||
1058cbf2 ZJS |
860 | j = readlink_malloc(p, &target); |
861 | if (j < 0) | |
2c7108c4 LP |
862 | return j; |
863 | ||
864 | k = file_in_same_dir(p, target); | |
2c7108c4 LP |
865 | if (!k) |
866 | return -ENOMEM; | |
867 | ||
868 | *r = k; | |
869 | return 0; | |
870 | } | |
871 | ||
83096483 LP |
872 | int readlink_and_canonicalize(const char *p, char **r) { |
873 | char *t, *s; | |
874 | int j; | |
875 | ||
876 | assert(p); | |
877 | assert(r); | |
878 | ||
879 | j = readlink_and_make_absolute(p, &t); | |
880 | if (j < 0) | |
881 | return j; | |
882 | ||
883 | s = canonicalize_file_name(t); | |
884 | if (s) { | |
885 | free(t); | |
886 | *r = s; | |
887 | } else | |
888 | *r = t; | |
889 | ||
890 | path_kill_slashes(*r); | |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
2a987ee8 LP |
895 | int reset_all_signal_handlers(void) { |
896 | int sig; | |
897 | ||
898 | for (sig = 1; sig < _NSIG; sig++) { | |
b92bea5d ZJS |
899 | struct sigaction sa = { |
900 | .sa_handler = SIG_DFL, | |
901 | .sa_flags = SA_RESTART, | |
902 | }; | |
2a987ee8 LP |
903 | |
904 | if (sig == SIGKILL || sig == SIGSTOP) | |
905 | continue; | |
906 | ||
2a987ee8 LP |
907 | /* On Linux the first two RT signals are reserved by |
908 | * glibc, and sigaction() will return EINVAL for them. */ | |
909 | if ((sigaction(sig, &sa, NULL) < 0)) | |
910 | if (errno != EINVAL) | |
911 | return -errno; | |
912 | } | |
913 | ||
8e274523 | 914 | return 0; |
2a987ee8 | 915 | } |
4a72ff34 LP |
916 | |
917 | char *strstrip(char *s) { | |
57a8eca8 | 918 | char *e; |
4a72ff34 LP |
919 | |
920 | /* Drops trailing whitespace. Modifies the string in | |
921 | * place. Returns pointer to first non-space character */ | |
922 | ||
923 | s += strspn(s, WHITESPACE); | |
924 | ||
57a8eca8 LP |
925 | for (e = strchr(s, 0); e > s; e --) |
926 | if (!strchr(WHITESPACE, e[-1])) | |
927 | break; | |
4a72ff34 | 928 | |
57a8eca8 | 929 | *e = 0; |
4a72ff34 LP |
930 | |
931 | return s; | |
4a72ff34 LP |
932 | } |
933 | ||
ee9b5e01 LP |
934 | char *delete_chars(char *s, const char *bad) { |
935 | char *f, *t; | |
936 | ||
937 | /* Drops all whitespace, regardless where in the string */ | |
938 | ||
939 | for (f = s, t = s; *f; f++) { | |
940 | if (strchr(bad, *f)) | |
941 | continue; | |
942 | ||
943 | *(t++) = *f; | |
944 | } | |
945 | ||
946 | *t = 0; | |
947 | ||
948 | return s; | |
949 | } | |
950 | ||
4a72ff34 LP |
951 | char *file_in_same_dir(const char *path, const char *filename) { |
952 | char *e, *r; | |
953 | size_t k; | |
954 | ||
955 | assert(path); | |
956 | assert(filename); | |
957 | ||
958 | /* This removes the last component of path and appends | |
959 | * filename, unless the latter is absolute anyway or the | |
960 | * former isn't */ | |
961 | ||
962 | if (path_is_absolute(filename)) | |
963 | return strdup(filename); | |
964 | ||
965 | if (!(e = strrchr(path, '/'))) | |
966 | return strdup(filename); | |
967 | ||
968 | k = strlen(filename); | |
969 | if (!(r = new(char, e-path+1+k+1))) | |
970 | return NULL; | |
971 | ||
972 | memcpy(r, path, e-path+1); | |
973 | memcpy(r+(e-path)+1, filename, k+1); | |
974 | ||
975 | return r; | |
976 | } | |
fb624d04 | 977 | |
c32dd69b LP |
978 | int rmdir_parents(const char *path, const char *stop) { |
979 | size_t l; | |
980 | int r = 0; | |
981 | ||
982 | assert(path); | |
983 | assert(stop); | |
984 | ||
985 | l = strlen(path); | |
986 | ||
987 | /* Skip trailing slashes */ | |
988 | while (l > 0 && path[l-1] == '/') | |
989 | l--; | |
990 | ||
991 | while (l > 0) { | |
992 | char *t; | |
993 | ||
994 | /* Skip last component */ | |
995 | while (l > 0 && path[l-1] != '/') | |
996 | l--; | |
997 | ||
998 | /* Skip trailing slashes */ | |
999 | while (l > 0 && path[l-1] == '/') | |
1000 | l--; | |
1001 | ||
1002 | if (l <= 0) | |
1003 | break; | |
1004 | ||
1005 | if (!(t = strndup(path, l))) | |
1006 | return -ENOMEM; | |
1007 | ||
1008 | if (path_startswith(stop, t)) { | |
1009 | free(t); | |
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | r = rmdir(t); | |
1014 | free(t); | |
1015 | ||
1016 | if (r < 0) | |
1017 | if (errno != ENOENT) | |
1018 | return -errno; | |
1019 | } | |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | ||
fb624d04 LP |
1024 | char hexchar(int x) { |
1025 | static const char table[16] = "0123456789abcdef"; | |
1026 | ||
1027 | return table[x & 15]; | |
1028 | } | |
4fe88d28 LP |
1029 | |
1030 | int unhexchar(char c) { | |
1031 | ||
1032 | if (c >= '0' && c <= '9') | |
1033 | return c - '0'; | |
1034 | ||
1035 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1036 | return c - 'a' + 10; |
4fe88d28 LP |
1037 | |
1038 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1039 | return c - 'A' + 10; |
4fe88d28 LP |
1040 | |
1041 | return -1; | |
1042 | } | |
1043 | ||
66e35261 LP |
1044 | char *hexmem(const void *p, size_t l) { |
1045 | char *r, *z; | |
1046 | const uint8_t *x; | |
1047 | ||
1048 | z = r = malloc(l * 2 + 1); | |
1049 | if (!r) | |
1050 | return NULL; | |
1051 | ||
1052 | for (x = p; x < (const uint8_t*) p + l; x++) { | |
1053 | *(z++) = hexchar(*x >> 4); | |
1054 | *(z++) = hexchar(*x & 15); | |
1055 | } | |
1056 | ||
1057 | *z = 0; | |
1058 | return r; | |
1059 | } | |
1060 | ||
2181a7f5 LP |
1061 | void *unhexmem(const char *p, size_t l) { |
1062 | uint8_t *r, *z; | |
1063 | const char *x; | |
1064 | ||
1065 | assert(p); | |
1066 | ||
1067 | z = r = malloc((l + 1) / 2 + 1); | |
1068 | if (!r) | |
1069 | return NULL; | |
1070 | ||
1071 | for (x = p; x < p + l; x += 2) { | |
1072 | int a, b; | |
1073 | ||
1074 | a = unhexchar(x[0]); | |
1075 | if (x+1 < p + l) | |
1076 | b = unhexchar(x[1]); | |
1077 | else | |
1078 | b = 0; | |
1079 | ||
1080 | *(z++) = (uint8_t) a << 4 | (uint8_t) b; | |
1081 | } | |
1082 | ||
1083 | *z = 0; | |
1084 | return r; | |
1085 | } | |
1086 | ||
4fe88d28 LP |
1087 | char octchar(int x) { |
1088 | return '0' + (x & 7); | |
1089 | } | |
1090 | ||
1091 | int unoctchar(char c) { | |
1092 | ||
1093 | if (c >= '0' && c <= '7') | |
1094 | return c - '0'; | |
1095 | ||
1096 | return -1; | |
1097 | } | |
1098 | ||
5af98f82 LP |
1099 | char decchar(int x) { |
1100 | return '0' + (x % 10); | |
1101 | } | |
1102 | ||
1103 | int undecchar(char c) { | |
1104 | ||
1105 | if (c >= '0' && c <= '9') | |
1106 | return c - '0'; | |
1107 | ||
1108 | return -1; | |
1109 | } | |
1110 | ||
4fe88d28 LP |
1111 | char *cescape(const char *s) { |
1112 | char *r, *t; | |
1113 | const char *f; | |
1114 | ||
1115 | assert(s); | |
1116 | ||
1117 | /* Does C style string escaping. */ | |
1118 | ||
f8e2fb7b LP |
1119 | r = new(char, strlen(s)*4 + 1); |
1120 | if (!r) | |
4fe88d28 LP |
1121 | return NULL; |
1122 | ||
1123 | for (f = s, t = r; *f; f++) | |
1124 | ||
1125 | switch (*f) { | |
1126 | ||
1127 | case '\a': | |
1128 | *(t++) = '\\'; | |
1129 | *(t++) = 'a'; | |
1130 | break; | |
1131 | case '\b': | |
1132 | *(t++) = '\\'; | |
1133 | *(t++) = 'b'; | |
1134 | break; | |
1135 | case '\f': | |
1136 | *(t++) = '\\'; | |
1137 | *(t++) = 'f'; | |
1138 | break; | |
1139 | case '\n': | |
1140 | *(t++) = '\\'; | |
1141 | *(t++) = 'n'; | |
1142 | break; | |
1143 | case '\r': | |
1144 | *(t++) = '\\'; | |
1145 | *(t++) = 'r'; | |
1146 | break; | |
1147 | case '\t': | |
1148 | *(t++) = '\\'; | |
1149 | *(t++) = 't'; | |
1150 | break; | |
1151 | case '\v': | |
1152 | *(t++) = '\\'; | |
1153 | *(t++) = 'v'; | |
1154 | break; | |
1155 | case '\\': | |
1156 | *(t++) = '\\'; | |
1157 | *(t++) = '\\'; | |
1158 | break; | |
1159 | case '"': | |
1160 | *(t++) = '\\'; | |
1161 | *(t++) = '"'; | |
1162 | break; | |
1163 | case '\'': | |
1164 | *(t++) = '\\'; | |
1165 | *(t++) = '\''; | |
1166 | break; | |
1167 | ||
1168 | default: | |
1169 | /* For special chars we prefer octal over | |
1170 | * hexadecimal encoding, simply because glib's | |
1171 | * g_strescape() does the same */ | |
1172 | if ((*f < ' ') || (*f >= 127)) { | |
1173 | *(t++) = '\\'; | |
1174 | *(t++) = octchar((unsigned char) *f >> 6); | |
1175 | *(t++) = octchar((unsigned char) *f >> 3); | |
1176 | *(t++) = octchar((unsigned char) *f); | |
1177 | } else | |
1178 | *(t++) = *f; | |
1179 | break; | |
1180 | } | |
1181 | ||
1182 | *t = 0; | |
1183 | ||
1184 | return r; | |
1185 | } | |
1186 | ||
5b4c61cd | 1187 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1188 | char *r, *t; |
1189 | const char *f; | |
5b4c61cd | 1190 | size_t pl; |
4fe88d28 LP |
1191 | |
1192 | assert(s); | |
1193 | ||
5b4c61cd LP |
1194 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1195 | ||
1196 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1197 | |
5b4c61cd | 1198 | r = new(char, pl+length+1); |
7f110ff9 | 1199 | if (!r) |
4fe88d28 LP |
1200 | return r; |
1201 | ||
5b4c61cd LP |
1202 | if (prefix) |
1203 | memcpy(r, prefix, pl); | |
1204 | ||
1205 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1206 | |
1207 | if (*f != '\\') { | |
1208 | *(t++) = *f; | |
1209 | continue; | |
1210 | } | |
1211 | ||
1212 | f++; | |
1213 | ||
1214 | switch (*f) { | |
1215 | ||
1216 | case 'a': | |
1217 | *(t++) = '\a'; | |
1218 | break; | |
1219 | case 'b': | |
1220 | *(t++) = '\b'; | |
1221 | break; | |
1222 | case 'f': | |
1223 | *(t++) = '\f'; | |
1224 | break; | |
1225 | case 'n': | |
1226 | *(t++) = '\n'; | |
1227 | break; | |
1228 | case 'r': | |
1229 | *(t++) = '\r'; | |
1230 | break; | |
1231 | case 't': | |
1232 | *(t++) = '\t'; | |
1233 | break; | |
1234 | case 'v': | |
1235 | *(t++) = '\v'; | |
1236 | break; | |
1237 | case '\\': | |
1238 | *(t++) = '\\'; | |
1239 | break; | |
1240 | case '"': | |
1241 | *(t++) = '"'; | |
1242 | break; | |
1243 | case '\'': | |
1244 | *(t++) = '\''; | |
1245 | break; | |
1246 | ||
e167fb86 LP |
1247 | case 's': |
1248 | /* This is an extension of the XDG syntax files */ | |
1249 | *(t++) = ' '; | |
1250 | break; | |
1251 | ||
4fe88d28 LP |
1252 | case 'x': { |
1253 | /* hexadecimal encoding */ | |
1254 | int a, b; | |
1255 | ||
7f110ff9 LP |
1256 | a = unhexchar(f[1]); |
1257 | b = unhexchar(f[2]); | |
1258 | ||
e0a33e7b | 1259 | if (a < 0 || b < 0 || (a == 0 && b == 0)) { |
4fe88d28 LP |
1260 | /* Invalid escape code, let's take it literal then */ |
1261 | *(t++) = '\\'; | |
1262 | *(t++) = 'x'; | |
1263 | } else { | |
1264 | *(t++) = (char) ((a << 4) | b); | |
1265 | f += 2; | |
1266 | } | |
1267 | ||
1268 | break; | |
1269 | } | |
1270 | ||
1271 | case '0': | |
1272 | case '1': | |
1273 | case '2': | |
1274 | case '3': | |
1275 | case '4': | |
1276 | case '5': | |
1277 | case '6': | |
1278 | case '7': { | |
1279 | /* octal encoding */ | |
1280 | int a, b, c; | |
1281 | ||
7f110ff9 LP |
1282 | a = unoctchar(f[0]); |
1283 | b = unoctchar(f[1]); | |
1284 | c = unoctchar(f[2]); | |
1285 | ||
e0a33e7b | 1286 | if (a < 0 || b < 0 || c < 0 || (a == 0 && b == 0 && c == 0)) { |
4fe88d28 LP |
1287 | /* Invalid escape code, let's take it literal then */ |
1288 | *(t++) = '\\'; | |
1289 | *(t++) = f[0]; | |
1290 | } else { | |
1291 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1292 | f += 2; | |
1293 | } | |
1294 | ||
1295 | break; | |
1296 | } | |
1297 | ||
1298 | case 0: | |
1299 | /* premature end of string.*/ | |
1300 | *(t++) = '\\'; | |
1301 | goto finish; | |
1302 | ||
1303 | default: | |
1304 | /* Invalid escape code, let's take it literal then */ | |
1305 | *(t++) = '\\'; | |
f3d4cc01 | 1306 | *(t++) = *f; |
4fe88d28 LP |
1307 | break; |
1308 | } | |
1309 | } | |
1310 | ||
1311 | finish: | |
1312 | *t = 0; | |
1313 | return r; | |
1314 | } | |
1315 | ||
5b4c61cd LP |
1316 | char *cunescape_length(const char *s, size_t length) { |
1317 | return cunescape_length_with_prefix(s, length, NULL); | |
1318 | } | |
1319 | ||
6febfd0d | 1320 | char *cunescape(const char *s) { |
5b4c61cd LP |
1321 | assert(s); |
1322 | ||
6febfd0d LP |
1323 | return cunescape_length(s, strlen(s)); |
1324 | } | |
4fe88d28 LP |
1325 | |
1326 | char *xescape(const char *s, const char *bad) { | |
1327 | char *r, *t; | |
1328 | const char *f; | |
1329 | ||
1330 | /* Escapes all chars in bad, in addition to \ and all special | |
1331 | * chars, in \xFF style escaping. May be reversed with | |
1332 | * cunescape. */ | |
1333 | ||
08ace05b LP |
1334 | r = new(char, strlen(s) * 4 + 1); |
1335 | if (!r) | |
4fe88d28 LP |
1336 | return NULL; |
1337 | ||
1338 | for (f = s, t = r; *f; f++) { | |
1339 | ||
b866264a LP |
1340 | if ((*f < ' ') || (*f >= 127) || |
1341 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1342 | *(t++) = '\\'; |
1343 | *(t++) = 'x'; | |
1344 | *(t++) = hexchar(*f >> 4); | |
1345 | *(t++) = hexchar(*f); | |
1346 | } else | |
1347 | *(t++) = *f; | |
1348 | } | |
1349 | ||
1350 | *t = 0; | |
1351 | ||
1352 | return r; | |
1353 | } | |
1354 | ||
67d51650 | 1355 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1356 | char *p; |
1357 | ||
67d51650 | 1358 | assert(t); |
4fe88d28 | 1359 | |
67d51650 | 1360 | for (p = t; *p; p++) |
4fe88d28 LP |
1361 | if (*p >= 'A' && *p <= 'Z') |
1362 | *p = *p - 'A' + 'a'; | |
1363 | ||
67d51650 | 1364 | return t; |
4fe88d28 | 1365 | } |
1dccbe19 | 1366 | |
44a6b1b6 | 1367 | _pure_ static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1368 | assert(filename); |
1369 | ||
1370 | return | |
1371 | filename[0] == '.' || | |
6c78be3c | 1372 | streq(filename, "lost+found") || |
e472d476 LP |
1373 | streq(filename, "aquota.user") || |
1374 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1375 | endswith(filename, ".rpmnew") || |
1376 | endswith(filename, ".rpmsave") || | |
1377 | endswith(filename, ".rpmorig") || | |
1378 | endswith(filename, ".dpkg-old") || | |
1379 | endswith(filename, ".dpkg-new") || | |
1380 | endswith(filename, ".swp"); | |
1381 | } | |
1382 | ||
a228a22f LP |
1383 | bool ignore_file(const char *filename) { |
1384 | assert(filename); | |
1385 | ||
1386 | if (endswith(filename, "~")) | |
93f1a063 | 1387 | return true; |
a228a22f LP |
1388 | |
1389 | return ignore_file_allow_backup(filename); | |
1390 | } | |
1391 | ||
3a0ecb08 | 1392 | int fd_nonblock(int fd, bool nonblock) { |
be8f4e9e | 1393 | int flags, nflags; |
3a0ecb08 LP |
1394 | |
1395 | assert(fd >= 0); | |
1396 | ||
be8f4e9e LP |
1397 | flags = fcntl(fd, F_GETFL, 0); |
1398 | if (flags < 0) | |
3a0ecb08 LP |
1399 | return -errno; |
1400 | ||
1401 | if (nonblock) | |
be8f4e9e | 1402 | nflags = flags | O_NONBLOCK; |
3a0ecb08 | 1403 | else |
be8f4e9e LP |
1404 | nflags = flags & ~O_NONBLOCK; |
1405 | ||
1406 | if (nflags == flags) | |
1407 | return 0; | |
3a0ecb08 | 1408 | |
34b42c96 | 1409 | if (fcntl(fd, F_SETFL, nflags) < 0) |
3a0ecb08 LP |
1410 | return -errno; |
1411 | ||
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | int fd_cloexec(int fd, bool cloexec) { | |
be8f4e9e | 1416 | int flags, nflags; |
3a0ecb08 LP |
1417 | |
1418 | assert(fd >= 0); | |
1419 | ||
be8f4e9e LP |
1420 | flags = fcntl(fd, F_GETFD, 0); |
1421 | if (flags < 0) | |
3a0ecb08 LP |
1422 | return -errno; |
1423 | ||
1424 | if (cloexec) | |
be8f4e9e | 1425 | nflags = flags | FD_CLOEXEC; |
3a0ecb08 | 1426 | else |
be8f4e9e LP |
1427 | nflags = flags & ~FD_CLOEXEC; |
1428 | ||
1429 | if (nflags == flags) | |
1430 | return 0; | |
3a0ecb08 | 1431 | |
34b42c96 | 1432 | if (fcntl(fd, F_SETFD, nflags) < 0) |
3a0ecb08 LP |
1433 | return -errno; |
1434 | ||
1435 | return 0; | |
1436 | } | |
1437 | ||
44a6b1b6 | 1438 | _pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
b19be9eb LP |
1439 | unsigned i; |
1440 | ||
1441 | assert(n_fdset == 0 || fdset); | |
1442 | ||
1443 | for (i = 0; i < n_fdset; i++) | |
1444 | if (fdset[i] == fd) | |
1445 | return true; | |
1446 | ||
1447 | return false; | |
1448 | } | |
1449 | ||
a0d40ac5 | 1450 | int close_all_fds(const int except[], unsigned n_except) { |
e1d75803 | 1451 | _cleanup_closedir_ DIR *d = NULL; |
a0d40ac5 LP |
1452 | struct dirent *de; |
1453 | int r = 0; | |
1454 | ||
b19be9eb LP |
1455 | assert(n_except == 0 || except); |
1456 | ||
1457 | d = opendir("/proc/self/fd"); | |
1458 | if (!d) { | |
1459 | int fd; | |
1460 | struct rlimit rl; | |
1461 | ||
1462 | /* When /proc isn't available (for example in chroots) | |
1463 | * the fallback is brute forcing through the fd | |
1464 | * table */ | |
1465 | ||
1466 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1467 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1468 | ||
1469 | if (fd_in_set(fd, except, n_except)) | |
1470 | continue; | |
1471 | ||
1472 | if (close_nointr(fd) < 0) | |
1473 | if (errno != EBADF && r == 0) | |
1474 | r = -errno; | |
1475 | } | |
1476 | ||
1477 | return r; | |
1478 | } | |
a0d40ac5 LP |
1479 | |
1480 | while ((de = readdir(d))) { | |
a7610064 | 1481 | int fd = -1; |
a0d40ac5 | 1482 | |
a16e1123 | 1483 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1484 | continue; |
1485 | ||
720ce21d LP |
1486 | if (safe_atoi(de->d_name, &fd) < 0) |
1487 | /* Let's better ignore this, just in case */ | |
1488 | continue; | |
a0d40ac5 LP |
1489 | |
1490 | if (fd < 3) | |
1491 | continue; | |
1492 | ||
1493 | if (fd == dirfd(d)) | |
1494 | continue; | |
1495 | ||
b19be9eb LP |
1496 | if (fd_in_set(fd, except, n_except)) |
1497 | continue; | |
a0d40ac5 | 1498 | |
720ce21d | 1499 | if (close_nointr(fd) < 0) { |
2f357920 | 1500 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1501 | if (errno != EBADF && r == 0) |
1502 | r = -errno; | |
2f357920 | 1503 | } |
a0d40ac5 LP |
1504 | } |
1505 | ||
a0d40ac5 LP |
1506 | return r; |
1507 | } | |
1508 | ||
db12775d LP |
1509 | bool chars_intersect(const char *a, const char *b) { |
1510 | const char *p; | |
1511 | ||
1512 | /* Returns true if any of the chars in a are in b. */ | |
1513 | for (p = a; *p; p++) | |
1514 | if (strchr(b, *p)) | |
1515 | return true; | |
1516 | ||
1517 | return false; | |
1518 | } | |
1519 | ||
42856c10 | 1520 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
1521 | static const char table[] = |
1522 | "cifs\0" | |
1523 | "smbfs\0" | |
da92ca5e | 1524 | "sshfs\0" |
a05f97b3 | 1525 | "ncpfs\0" |
dac70dc7 | 1526 | "ncp\0" |
a05f97b3 LP |
1527 | "nfs\0" |
1528 | "nfs4\0" | |
1529 | "gfs\0" | |
67608cad LP |
1530 | "gfs2\0" |
1531 | "glusterfs\0"; | |
1532 | ||
1533 | const char *x; | |
1534 | ||
1535 | x = startswith(fstype, "fuse."); | |
1536 | if (x) | |
1537 | fstype = x; | |
42856c10 | 1538 | |
a05f97b3 | 1539 | return nulstr_contains(table, fstype); |
42856c10 LP |
1540 | } |
1541 | ||
601f6a1e | 1542 | int chvt(int vt) { |
a05f97b3 | 1543 | _cleanup_close_ int fd; |
601f6a1e | 1544 | |
a05f97b3 LP |
1545 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1546 | if (fd < 0) | |
601f6a1e LP |
1547 | return -errno; |
1548 | ||
1549 | if (vt < 0) { | |
1550 | int tiocl[2] = { | |
1551 | TIOCL_GETKMSGREDIRECT, | |
1552 | 0 | |
1553 | }; | |
1554 | ||
a05f97b3 LP |
1555 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1556 | return -errno; | |
601f6a1e LP |
1557 | |
1558 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1559 | } | |
1560 | ||
1561 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1562 | return -errno; |
601f6a1e | 1563 | |
a05f97b3 | 1564 | return 0; |
601f6a1e LP |
1565 | } |
1566 | ||
8f2d43a0 | 1567 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 | 1568 | struct termios old_termios, new_termios; |
e0a33e7b | 1569 | char c, line[LINE_MAX]; |
80876c20 LP |
1570 | |
1571 | assert(f); | |
1572 | assert(ret); | |
1573 | ||
1574 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1575 | new_termios = old_termios; | |
1576 | ||
1577 | new_termios.c_lflag &= ~ICANON; | |
1578 | new_termios.c_cc[VMIN] = 1; | |
1579 | new_termios.c_cc[VTIME] = 0; | |
1580 | ||
1581 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1582 | size_t k; | |
1583 | ||
3a43da28 | 1584 | if (t != USEC_INFINITY) { |
8f2d43a0 LP |
1585 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { |
1586 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1587 | return -ETIMEDOUT; | |
1588 | } | |
1589 | } | |
1590 | ||
80876c20 LP |
1591 | k = fread(&c, 1, 1, f); |
1592 | ||
1593 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1594 | ||
1595 | if (k <= 0) | |
1596 | return -EIO; | |
1597 | ||
1598 | if (need_nl) | |
1599 | *need_nl = c != '\n'; | |
1600 | ||
1601 | *ret = c; | |
1602 | return 0; | |
1603 | } | |
1604 | } | |
1605 | ||
3a43da28 | 1606 | if (t != USEC_INFINITY) { |
8f2d43a0 LP |
1607 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) |
1608 | return -ETIMEDOUT; | |
e0a33e7b | 1609 | } |
8f2d43a0 | 1610 | |
3a8a9163 | 1611 | errno = 0; |
8f2d43a0 | 1612 | if (!fgets(line, sizeof(line), f)) |
3a8a9163 | 1613 | return errno ? -errno : -EIO; |
80876c20 LP |
1614 | |
1615 | truncate_nl(line); | |
1616 | ||
1617 | if (strlen(line) != 1) | |
1618 | return -EBADMSG; | |
1619 | ||
1620 | if (need_nl) | |
1621 | *need_nl = false; | |
1622 | ||
1623 | *ret = line[0]; | |
1624 | return 0; | |
1625 | } | |
1626 | ||
418b9be5 | 1627 | int ask_char(char *ret, const char *replies, const char *text, ...) { |
e0a33e7b | 1628 | int r; |
1b39d4b9 | 1629 | |
80876c20 LP |
1630 | assert(ret); |
1631 | assert(replies); | |
1632 | assert(text); | |
1633 | ||
1634 | for (;;) { | |
1635 | va_list ap; | |
1636 | char c; | |
80876c20 LP |
1637 | bool need_nl = true; |
1638 | ||
8481248b | 1639 | if (on_tty()) |
c1072ea0 | 1640 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1641 | |
80876c20 LP |
1642 | va_start(ap, text); |
1643 | vprintf(text, ap); | |
1644 | va_end(ap); | |
1645 | ||
8481248b | 1646 | if (on_tty()) |
c1072ea0 | 1647 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1648 | |
80876c20 LP |
1649 | fflush(stdout); |
1650 | ||
3a43da28 | 1651 | r = read_one_char(stdin, &c, USEC_INFINITY, &need_nl); |
8f2d43a0 | 1652 | if (r < 0) { |
80876c20 LP |
1653 | |
1654 | if (r == -EBADMSG) { | |
1655 | puts("Bad input, please try again."); | |
1656 | continue; | |
1657 | } | |
1658 | ||
1659 | putchar('\n'); | |
1660 | return r; | |
1661 | } | |
1662 | ||
1663 | if (need_nl) | |
1664 | putchar('\n'); | |
1665 | ||
1666 | if (strchr(replies, c)) { | |
1667 | *ret = c; | |
1668 | return 0; | |
1669 | } | |
1670 | ||
1671 | puts("Read unexpected character, please try again."); | |
1672 | } | |
1673 | } | |
1674 | ||
418b9be5 LP |
1675 | int ask_string(char **ret, const char *text, ...) { |
1676 | assert(ret); | |
1677 | assert(text); | |
1678 | ||
1679 | for (;;) { | |
1680 | char line[LINE_MAX]; | |
1681 | va_list ap; | |
1682 | ||
1683 | if (on_tty()) | |
1684 | fputs(ANSI_HIGHLIGHT_ON, stdout); | |
1685 | ||
1686 | va_start(ap, text); | |
1687 | vprintf(text, ap); | |
1688 | va_end(ap); | |
1689 | ||
1690 | if (on_tty()) | |
1691 | fputs(ANSI_HIGHLIGHT_OFF, stdout); | |
1692 | ||
1693 | fflush(stdout); | |
1694 | ||
1695 | errno = 0; | |
1696 | if (!fgets(line, sizeof(line), stdin)) | |
1697 | return errno ? -errno : -EIO; | |
1698 | ||
1699 | if (!endswith(line, "\n")) | |
1700 | putchar('\n'); | |
1701 | else { | |
1702 | char *s; | |
1703 | ||
1704 | if (isempty(line)) | |
1705 | continue; | |
1706 | ||
1707 | truncate_nl(line); | |
1708 | s = strdup(line); | |
1709 | if (!s) | |
1710 | return -ENOMEM; | |
1711 | ||
1712 | *ret = s; | |
1713 | return 0; | |
1714 | } | |
1715 | } | |
1716 | } | |
1717 | ||
512947d4 | 1718 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
1719 | struct termios termios; |
1720 | int r = 0; | |
3fe5e5d4 LP |
1721 | |
1722 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
1723 | |
1724 | assert(fd >= 0); | |
1725 | ||
eed1d0e3 LP |
1726 | /* We leave locked terminal attributes untouched, so that |
1727 | * Plymouth may set whatever it wants to set, and we don't | |
1728 | * interfere with that. */ | |
3fe5e5d4 LP |
1729 | |
1730 | /* Disable exclusive mode, just in case */ | |
1731 | ioctl(fd, TIOCNXCL); | |
1732 | ||
5c0100a5 | 1733 | /* Switch to text mode */ |
512947d4 MS |
1734 | if (switch_to_text) |
1735 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 1736 | |
3fe5e5d4 | 1737 | /* Enable console unicode mode */ |
df465b3f | 1738 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
1739 | |
1740 | if (tcgetattr(fd, &termios) < 0) { | |
1741 | r = -errno; | |
1742 | goto finish; | |
1743 | } | |
1744 | ||
aaf694ca LP |
1745 | /* We only reset the stuff that matters to the software. How |
1746 | * hardware is set up we don't touch assuming that somebody | |
1747 | * else will do that for us */ | |
1748 | ||
1749 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
1750 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
1751 | termios.c_oflag |= ONLCR; | |
1752 | termios.c_cflag |= CREAD; | |
1753 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
1754 | ||
1755 | termios.c_cc[VINTR] = 03; /* ^C */ | |
1756 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
1757 | termios.c_cc[VERASE] = 0177; | |
1758 | termios.c_cc[VKILL] = 025; /* ^X */ | |
1759 | termios.c_cc[VEOF] = 04; /* ^D */ | |
1760 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
1761 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
1762 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
1763 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
1764 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
1765 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
1766 | termios.c_cc[VEOL] = 0; |
1767 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
1768 | |
1769 | termios.c_cc[VTIME] = 0; | |
1770 | termios.c_cc[VMIN] = 1; | |
1771 | ||
1772 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
1773 | r = -errno; | |
1774 | ||
1775 | finish: | |
1776 | /* Just in case, flush all crap out */ | |
1777 | tcflush(fd, TCIOFLUSH); | |
1778 | ||
1779 | return r; | |
1780 | } | |
1781 | ||
6ea832a2 | 1782 | int reset_terminal(const char *name) { |
03e334a1 | 1783 | _cleanup_close_ int fd = -1; |
6ea832a2 LP |
1784 | |
1785 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
1786 | if (fd < 0) | |
1787 | return fd; | |
1788 | ||
03e334a1 | 1789 | return reset_terminal_fd(fd, true); |
6ea832a2 LP |
1790 | } |
1791 | ||
80876c20 LP |
1792 | int open_terminal(const char *name, int mode) { |
1793 | int fd, r; | |
f73f76ac | 1794 | unsigned c = 0; |
80876c20 | 1795 | |
f73f76ac LP |
1796 | /* |
1797 | * If a TTY is in the process of being closed opening it might | |
1798 | * cause EIO. This is horribly awful, but unlikely to be | |
1799 | * changed in the kernel. Hence we work around this problem by | |
1800 | * retrying a couple of times. | |
1801 | * | |
1802 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
1803 | */ | |
1804 | ||
dd94c17e LP |
1805 | assert(!(mode & O_CREAT)); |
1806 | ||
f73f76ac | 1807 | for (;;) { |
dd94c17e | 1808 | fd = open(name, mode, 0); |
af6da548 | 1809 | if (fd >= 0) |
f73f76ac LP |
1810 | break; |
1811 | ||
1812 | if (errno != EIO) | |
1813 | return -errno; | |
1814 | ||
af6da548 | 1815 | /* Max 1s in total */ |
f73f76ac LP |
1816 | if (c >= 20) |
1817 | return -errno; | |
1818 | ||
1819 | usleep(50 * USEC_PER_MSEC); | |
1820 | c++; | |
1821 | } | |
1822 | ||
1823 | if (fd < 0) | |
80876c20 LP |
1824 | return -errno; |
1825 | ||
af6da548 LP |
1826 | r = isatty(fd); |
1827 | if (r < 0) { | |
03e334a1 | 1828 | safe_close(fd); |
80876c20 LP |
1829 | return -errno; |
1830 | } | |
1831 | ||
1832 | if (!r) { | |
03e334a1 | 1833 | safe_close(fd); |
80876c20 LP |
1834 | return -ENOTTY; |
1835 | } | |
1836 | ||
1837 | return fd; | |
1838 | } | |
1839 | ||
1840 | int flush_fd(int fd) { | |
b92bea5d ZJS |
1841 | struct pollfd pollfd = { |
1842 | .fd = fd, | |
1843 | .events = POLLIN, | |
1844 | }; | |
80876c20 LP |
1845 | |
1846 | for (;;) { | |
20c03b7b | 1847 | char buf[LINE_MAX]; |
80876c20 LP |
1848 | ssize_t l; |
1849 | int r; | |
1850 | ||
e62d8c39 ZJS |
1851 | r = poll(&pollfd, 1, 0); |
1852 | if (r < 0) { | |
80876c20 LP |
1853 | if (errno == EINTR) |
1854 | continue; | |
1855 | ||
1856 | return -errno; | |
80876c20 | 1857 | |
e62d8c39 | 1858 | } else if (r == 0) |
80876c20 LP |
1859 | return 0; |
1860 | ||
e62d8c39 ZJS |
1861 | l = read(fd, buf, sizeof(buf)); |
1862 | if (l < 0) { | |
80876c20 LP |
1863 | |
1864 | if (errno == EINTR) | |
1865 | continue; | |
1866 | ||
1867 | if (errno == EAGAIN) | |
1868 | return 0; | |
1869 | ||
1870 | return -errno; | |
e62d8c39 | 1871 | } else if (l == 0) |
80876c20 LP |
1872 | return 0; |
1873 | } | |
1874 | } | |
1875 | ||
af6da548 LP |
1876 | int acquire_terminal( |
1877 | const char *name, | |
1878 | bool fail, | |
1879 | bool force, | |
1880 | bool ignore_tiocstty_eperm, | |
1881 | usec_t timeout) { | |
1882 | ||
4a0ff478 | 1883 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 1884 | usec_t ts = 0; |
80876c20 LP |
1885 | |
1886 | assert(name); | |
1887 | ||
1888 | /* We use inotify to be notified when the tty is closed. We | |
1889 | * create the watch before checking if we can actually acquire | |
1890 | * it, so that we don't lose any event. | |
1891 | * | |
1892 | * Note: strictly speaking this actually watches for the | |
1893 | * device being closed, it does *not* really watch whether a | |
1894 | * tty loses its controlling process. However, unless some | |
1895 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
1896 | * its tty otherwise this will not become a problem. As long | |
1897 | * as the administrator makes sure not configure any service | |
1898 | * on the same tty as an untrusted user this should not be a | |
1899 | * problem. (Which he probably should not do anyway.) */ | |
1900 | ||
3a43da28 | 1901 | if (timeout != USEC_INFINITY) |
af6da548 LP |
1902 | ts = now(CLOCK_MONOTONIC); |
1903 | ||
80876c20 | 1904 | if (!fail && !force) { |
3a43da28 | 1905 | notify = inotify_init1(IN_CLOEXEC | (timeout != USEC_INFINITY ? IN_NONBLOCK : 0)); |
af6da548 | 1906 | if (notify < 0) { |
80876c20 LP |
1907 | r = -errno; |
1908 | goto fail; | |
1909 | } | |
1910 | ||
af6da548 LP |
1911 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
1912 | if (wd < 0) { | |
80876c20 LP |
1913 | r = -errno; |
1914 | goto fail; | |
1915 | } | |
1916 | } | |
1917 | ||
1918 | for (;;) { | |
b92bea5d ZJS |
1919 | struct sigaction sa_old, sa_new = { |
1920 | .sa_handler = SIG_IGN, | |
1921 | .sa_flags = SA_RESTART, | |
1922 | }; | |
1923 | ||
af6da548 LP |
1924 | if (notify >= 0) { |
1925 | r = flush_fd(notify); | |
1926 | if (r < 0) | |
e3d1855b | 1927 | goto fail; |
af6da548 | 1928 | } |
80876c20 LP |
1929 | |
1930 | /* We pass here O_NOCTTY only so that we can check the return | |
1931 | * value TIOCSCTTY and have a reliable way to figure out if we | |
1932 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
1933 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
1934 | if (fd < 0) | |
6ea832a2 | 1935 | return fd; |
80876c20 | 1936 | |
32c4bef8 LP |
1937 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1938 | * if we already own the tty. */ | |
32c4bef8 LP |
1939 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
1940 | ||
80876c20 | 1941 | /* First, try to get the tty */ |
32c4bef8 LP |
1942 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
1943 | r = -errno; | |
1944 | ||
1945 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
1946 | |
1947 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
1948 | * returning EPERM, i.e. when very likely we already | |
1949 | * are have this controlling terminal. */ | |
32c4bef8 | 1950 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
1951 | r = 0; |
1952 | ||
32c4bef8 | 1953 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
1954 | goto fail; |
1955 | } | |
1956 | ||
1957 | if (r >= 0) | |
1958 | break; | |
1959 | ||
1960 | assert(!fail); | |
1961 | assert(!force); | |
1962 | assert(notify >= 0); | |
1963 | ||
1964 | for (;;) { | |
f601daa7 | 1965 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 1966 | ssize_t l; |
f601daa7 | 1967 | struct inotify_event *e; |
80876c20 | 1968 | |
3a43da28 | 1969 | if (timeout != USEC_INFINITY) { |
af6da548 LP |
1970 | usec_t n; |
1971 | ||
1972 | n = now(CLOCK_MONOTONIC); | |
1973 | if (ts + timeout < n) { | |
1974 | r = -ETIMEDOUT; | |
1975 | goto fail; | |
1976 | } | |
1977 | ||
1978 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
1979 | if (r < 0) | |
1980 | goto fail; | |
1981 | ||
1982 | if (r == 0) { | |
1983 | r = -ETIMEDOUT; | |
1984 | goto fail; | |
1985 | } | |
1986 | } | |
1987 | ||
1988 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
1989 | if (l < 0) { | |
80876c20 | 1990 | |
af6da548 | 1991 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
1992 | continue; |
1993 | ||
1994 | r = -errno; | |
1995 | goto fail; | |
1996 | } | |
1997 | ||
1998 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 1999 | |
f601daa7 LP |
2000 | while (l > 0) { |
2001 | size_t step; | |
80876c20 | 2002 | |
f601daa7 | 2003 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2004 | r = -EIO; |
f601daa7 LP |
2005 | goto fail; |
2006 | } | |
80876c20 | 2007 | |
f601daa7 LP |
2008 | step = sizeof(struct inotify_event) + e->len; |
2009 | assert(step <= (size_t) l); | |
80876c20 | 2010 | |
f601daa7 LP |
2011 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2012 | l -= step; | |
80876c20 LP |
2013 | } |
2014 | ||
2015 | break; | |
2016 | } | |
2017 | ||
2018 | /* We close the tty fd here since if the old session | |
2019 | * ended our handle will be dead. It's important that | |
2020 | * we do this after sleeping, so that we don't enter | |
2021 | * an endless loop. */ | |
03e334a1 | 2022 | safe_close(fd); |
80876c20 LP |
2023 | } |
2024 | ||
03e334a1 | 2025 | safe_close(notify); |
80876c20 | 2026 | |
512947d4 MS |
2027 | r = reset_terminal_fd(fd, true); |
2028 | if (r < 0) | |
80876c20 LP |
2029 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2030 | ||
2031 | return fd; | |
2032 | ||
2033 | fail: | |
03e334a1 LP |
2034 | safe_close(fd); |
2035 | safe_close(notify); | |
80876c20 LP |
2036 | |
2037 | return r; | |
2038 | } | |
2039 | ||
2040 | int release_terminal(void) { | |
e62d8c39 | 2041 | int r = 0; |
b92bea5d ZJS |
2042 | struct sigaction sa_old, sa_new = { |
2043 | .sa_handler = SIG_IGN, | |
2044 | .sa_flags = SA_RESTART, | |
2045 | }; | |
7fd1b19b | 2046 | _cleanup_close_ int fd; |
80876c20 | 2047 | |
e62d8c39 ZJS |
2048 | fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC); |
2049 | if (fd < 0) | |
80876c20 LP |
2050 | return -errno; |
2051 | ||
57cd2192 LP |
2052 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2053 | * by our own TIOCNOTTY */ | |
57cd2192 LP |
2054 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
2055 | ||
80876c20 LP |
2056 | if (ioctl(fd, TIOCNOTTY) < 0) |
2057 | r = -errno; | |
2058 | ||
57cd2192 LP |
2059 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2060 | ||
80876c20 LP |
2061 | return r; |
2062 | } | |
2063 | ||
9a34ec5f LP |
2064 | int sigaction_many(const struct sigaction *sa, ...) { |
2065 | va_list ap; | |
2066 | int r = 0, sig; | |
2067 | ||
2068 | va_start(ap, sa); | |
2069 | while ((sig = va_arg(ap, int)) > 0) | |
2070 | if (sigaction(sig, sa, NULL) < 0) | |
2071 | r = -errno; | |
2072 | va_end(ap); | |
2073 | ||
2074 | return r; | |
2075 | } | |
2076 | ||
2077 | int ignore_signals(int sig, ...) { | |
b92bea5d ZJS |
2078 | struct sigaction sa = { |
2079 | .sa_handler = SIG_IGN, | |
2080 | .sa_flags = SA_RESTART, | |
2081 | }; | |
9a34ec5f LP |
2082 | va_list ap; |
2083 | int r = 0; | |
a337c6fc | 2084 | |
9a34ec5f LP |
2085 | if (sigaction(sig, &sa, NULL) < 0) |
2086 | r = -errno; | |
2087 | ||
2088 | va_start(ap, sig); | |
2089 | while ((sig = va_arg(ap, int)) > 0) | |
2090 | if (sigaction(sig, &sa, NULL) < 0) | |
2091 | r = -errno; | |
2092 | va_end(ap); | |
2093 | ||
2094 | return r; | |
2095 | } | |
2096 | ||
2097 | int default_signals(int sig, ...) { | |
b92bea5d ZJS |
2098 | struct sigaction sa = { |
2099 | .sa_handler = SIG_DFL, | |
2100 | .sa_flags = SA_RESTART, | |
2101 | }; | |
9a34ec5f LP |
2102 | va_list ap; |
2103 | int r = 0; | |
2104 | ||
9a34ec5f LP |
2105 | if (sigaction(sig, &sa, NULL) < 0) |
2106 | r = -errno; | |
2107 | ||
2108 | va_start(ap, sig); | |
2109 | while ((sig = va_arg(ap, int)) > 0) | |
2110 | if (sigaction(sig, &sa, NULL) < 0) | |
2111 | r = -errno; | |
2112 | va_end(ap); | |
2113 | ||
2114 | return r; | |
a337c6fc LP |
2115 | } |
2116 | ||
3d94f76c | 2117 | void safe_close_pair(int p[]) { |
8d567588 LP |
2118 | assert(p); |
2119 | ||
3d94f76c LP |
2120 | if (p[0] == p[1]) { |
2121 | /* Special case pairs which use the same fd in both | |
2122 | * directions... */ | |
2123 | p[0] = p[1] = safe_close(p[0]); | |
2124 | return; | |
8d567588 LP |
2125 | } |
2126 | ||
3d94f76c LP |
2127 | p[0] = safe_close(p[0]); |
2128 | p[1] = safe_close(p[1]); | |
8d567588 LP |
2129 | } |
2130 | ||
eb22ac37 | 2131 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2132 | uint8_t *p = buf; |
8d567588 LP |
2133 | ssize_t n = 0; |
2134 | ||
2135 | assert(fd >= 0); | |
2136 | assert(buf); | |
2137 | ||
8d567588 LP |
2138 | while (nbytes > 0) { |
2139 | ssize_t k; | |
2140 | ||
7d5dd5e0 LP |
2141 | k = read(fd, p, nbytes); |
2142 | if (k < 0 && errno == EINTR) | |
2143 | continue; | |
8d567588 | 2144 | |
7d5dd5e0 | 2145 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 | 2146 | |
7d5dd5e0 LP |
2147 | /* We knowingly ignore any return value here, |
2148 | * and expect that any error/EOF is reported | |
2149 | * via read() */ | |
8d567588 | 2150 | |
3a43da28 | 2151 | fd_wait_for_event(fd, POLLIN, USEC_INFINITY); |
7d5dd5e0 LP |
2152 | continue; |
2153 | } | |
8d567588 | 2154 | |
7d5dd5e0 | 2155 | if (k <= 0) |
8d567588 | 2156 | return n > 0 ? n : (k < 0 ? -errno : 0); |
8d567588 LP |
2157 | |
2158 | p += k; | |
2159 | nbytes -= k; | |
2160 | n += k; | |
2161 | } | |
2162 | ||
2163 | return n; | |
2164 | } | |
2165 | ||
eb22ac37 | 2166 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2167 | const uint8_t *p = buf; |
eb22ac37 LP |
2168 | ssize_t n = 0; |
2169 | ||
2170 | assert(fd >= 0); | |
2171 | assert(buf); | |
2172 | ||
eb22ac37 LP |
2173 | while (nbytes > 0) { |
2174 | ssize_t k; | |
2175 | ||
fe652127 | 2176 | k = write(fd, p, nbytes); |
7d5dd5e0 LP |
2177 | if (k < 0 && errno == EINTR) |
2178 | continue; | |
eb22ac37 | 2179 | |
7d5dd5e0 | 2180 | if (k < 0 && errno == EAGAIN && do_poll) { |
eb22ac37 | 2181 | |
7d5dd5e0 LP |
2182 | /* We knowingly ignore any return value here, |
2183 | * and expect that any error/EOF is reported | |
2184 | * via write() */ | |
eb22ac37 | 2185 | |
3a43da28 | 2186 | fd_wait_for_event(fd, POLLOUT, USEC_INFINITY); |
7d5dd5e0 LP |
2187 | continue; |
2188 | } | |
eb22ac37 | 2189 | |
7d5dd5e0 | 2190 | if (k <= 0) |
eb22ac37 | 2191 | return n > 0 ? n : (k < 0 ? -errno : 0); |
eb22ac37 LP |
2192 | |
2193 | p += k; | |
2194 | nbytes -= k; | |
2195 | n += k; | |
2196 | } | |
2197 | ||
2198 | return n; | |
2199 | } | |
2200 | ||
5556b5fe LP |
2201 | int parse_size(const char *t, off_t base, off_t *size) { |
2202 | ||
2203 | /* Soo, sometimes we want to parse IEC binary suffxies, and | |
2204 | * sometimes SI decimal suffixes. This function can parse | |
2205 | * both. Which one is the right way depends on the | |
2206 | * context. Wikipedia suggests that SI is customary for | |
2207 | * hardrware metrics and network speeds, while IEC is | |
2208 | * customary for most data sizes used by software and volatile | |
2209 | * (RAM) memory. Hence be careful which one you pick! | |
2210 | * | |
2211 | * In either case we use just K, M, G as suffix, and not Ki, | |
2212 | * Mi, Gi or so (as IEC would suggest). That's because that's | |
2213 | * frickin' ugly. But this means you really need to make sure | |
2214 | * to document which base you are parsing when you use this | |
2215 | * call. */ | |
2216 | ||
2217 | struct table { | |
ab1f0633 | 2218 | const char *suffix; |
b32ff512 | 2219 | unsigned long long factor; |
5556b5fe LP |
2220 | }; |
2221 | ||
2222 | static const struct table iec[] = { | |
32895bb3 | 2223 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
840292be ZJS |
2224 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2225 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
2226 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2227 | { "M", 1024ULL*1024ULL }, | |
2228 | { "K", 1024ULL }, | |
2229 | { "B", 1 }, | |
ab1f0633 LP |
2230 | { "", 1 }, |
2231 | }; | |
2232 | ||
5556b5fe | 2233 | static const struct table si[] = { |
5556b5fe | 2234 | { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
840292be ZJS |
2235 | { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
2236 | { "T", 1000ULL*1000ULL*1000ULL*1000ULL }, | |
2237 | { "G", 1000ULL*1000ULL*1000ULL }, | |
2238 | { "M", 1000ULL*1000ULL }, | |
2239 | { "K", 1000ULL }, | |
2240 | { "B", 1 }, | |
5556b5fe LP |
2241 | { "", 1 }, |
2242 | }; | |
2243 | ||
2244 | const struct table *table; | |
ab1f0633 | 2245 | const char *p; |
b32ff512 | 2246 | unsigned long long r = 0; |
840292be | 2247 | unsigned n_entries, start_pos = 0; |
ab1f0633 LP |
2248 | |
2249 | assert(t); | |
5556b5fe LP |
2250 | assert(base == 1000 || base == 1024); |
2251 | assert(size); | |
2252 | ||
2253 | if (base == 1000) { | |
2254 | table = si; | |
2255 | n_entries = ELEMENTSOF(si); | |
2256 | } else { | |
2257 | table = iec; | |
2258 | n_entries = ELEMENTSOF(iec); | |
2259 | } | |
ab1f0633 LP |
2260 | |
2261 | p = t; | |
2262 | do { | |
2263 | long long l; | |
9480794b ZJS |
2264 | unsigned long long l2; |
2265 | double frac = 0; | |
ab1f0633 LP |
2266 | char *e; |
2267 | unsigned i; | |
2268 | ||
2269 | errno = 0; | |
2270 | l = strtoll(p, &e, 10); | |
2271 | ||
8333c77e | 2272 | if (errno > 0) |
ab1f0633 LP |
2273 | return -errno; |
2274 | ||
2275 | if (l < 0) | |
2276 | return -ERANGE; | |
2277 | ||
2278 | if (e == p) | |
2279 | return -EINVAL; | |
2280 | ||
9480794b ZJS |
2281 | if (*e == '.') { |
2282 | e++; | |
2283 | if (*e >= '0' && *e <= '9') { | |
2284 | char *e2; | |
2285 | ||
2286 | /* strotoull itself would accept space/+/- */ | |
2287 | l2 = strtoull(e, &e2, 10); | |
2288 | ||
2289 | if (errno == ERANGE) | |
2290 | return -errno; | |
2291 | ||
2292 | /* Ignore failure. E.g. 10.M is valid */ | |
2293 | frac = l2; | |
2294 | for (; e < e2; e++) | |
2295 | frac /= 10; | |
2296 | } | |
2297 | } | |
2298 | ||
ab1f0633 LP |
2299 | e += strspn(e, WHITESPACE); |
2300 | ||
840292be | 2301 | for (i = start_pos; i < n_entries; i++) |
ab1f0633 | 2302 | if (startswith(e, table[i].suffix)) { |
b32ff512 | 2303 | unsigned long long tmp; |
9480794b | 2304 | if ((unsigned long long) l + (frac > 0) > ULLONG_MAX / table[i].factor) |
b32ff512 | 2305 | return -ERANGE; |
9480794b | 2306 | tmp = l * table[i].factor + (unsigned long long) (frac * table[i].factor); |
b32ff512 ZJS |
2307 | if (tmp > ULLONG_MAX - r) |
2308 | return -ERANGE; | |
2309 | ||
2310 | r += tmp; | |
2311 | if ((unsigned long long) (off_t) r != r) | |
2312 | return -ERANGE; | |
2313 | ||
ab1f0633 | 2314 | p = e + strlen(table[i].suffix); |
840292be ZJS |
2315 | |
2316 | start_pos = i + 1; | |
ab1f0633 LP |
2317 | break; |
2318 | } | |
2319 | ||
5556b5fe | 2320 | if (i >= n_entries) |
ab1f0633 LP |
2321 | return -EINVAL; |
2322 | ||
b32ff512 | 2323 | } while (*p); |
ab1f0633 | 2324 | |
5556b5fe | 2325 | *size = r; |
ab1f0633 LP |
2326 | |
2327 | return 0; | |
2328 | } | |
2329 | ||
843d2643 LP |
2330 | int make_stdio(int fd) { |
2331 | int r, s, t; | |
2332 | ||
2333 | assert(fd >= 0); | |
2334 | ||
73836c5c LP |
2335 | r = dup3(fd, STDIN_FILENO, 0); |
2336 | s = dup3(fd, STDOUT_FILENO, 0); | |
2337 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2338 | |
2339 | if (fd >= 3) | |
03e334a1 | 2340 | safe_close(fd); |
843d2643 LP |
2341 | |
2342 | if (r < 0 || s < 0 || t < 0) | |
2343 | return -errno; | |
2344 | ||
73836c5c | 2345 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2346 | |
843d2643 LP |
2347 | return 0; |
2348 | } | |
2349 | ||
ade509ce LP |
2350 | int make_null_stdio(void) { |
2351 | int null_fd; | |
2352 | ||
cd3bd60a LP |
2353 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2354 | if (null_fd < 0) | |
ade509ce LP |
2355 | return -errno; |
2356 | ||
2357 | return make_stdio(null_fd); | |
2358 | } | |
2359 | ||
8407a5d0 LP |
2360 | bool is_device_path(const char *path) { |
2361 | ||
2362 | /* Returns true on paths that refer to a device, either in | |
2363 | * sysfs or in /dev */ | |
2364 | ||
2365 | return | |
2366 | path_startswith(path, "/dev/") || | |
2367 | path_startswith(path, "/sys/"); | |
2368 | } | |
2369 | ||
01f78473 | 2370 | int dir_is_empty(const char *path) { |
a05f97b3 | 2371 | _cleanup_closedir_ DIR *d; |
01f78473 | 2372 | |
a05f97b3 LP |
2373 | d = opendir(path); |
2374 | if (!d) | |
01f78473 LP |
2375 | return -errno; |
2376 | ||
2377 | for (;;) { | |
7d5e9c0f | 2378 | struct dirent *de; |
01f78473 | 2379 | |
3fd11280 FW |
2380 | errno = 0; |
2381 | de = readdir(d); | |
2382 | if (!de && errno != 0) | |
2383 | return -errno; | |
01f78473 | 2384 | |
a05f97b3 LP |
2385 | if (!de) |
2386 | return 1; | |
01f78473 | 2387 | |
a05f97b3 LP |
2388 | if (!ignore_file(de->d_name)) |
2389 | return 0; | |
2390 | } | |
01f78473 LP |
2391 | } |
2392 | ||
844ec79b ZJS |
2393 | char* dirname_malloc(const char *path) { |
2394 | char *d, *dir, *dir2; | |
2395 | ||
2396 | d = strdup(path); | |
2397 | if (!d) | |
2398 | return NULL; | |
2399 | dir = dirname(d); | |
2400 | assert(dir); | |
2401 | ||
2402 | if (dir != d) { | |
2403 | dir2 = strdup(dir); | |
2404 | free(d); | |
2405 | return dir2; | |
2406 | } | |
2407 | ||
2408 | return dir; | |
2409 | } | |
2410 | ||
b89446bb | 2411 | int dev_urandom(void *p, size_t n) { |
a05f97b3 | 2412 | _cleanup_close_ int fd; |
9bf3b535 | 2413 | ssize_t k; |
d3782d60 | 2414 | |
ac0930c8 LP |
2415 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2416 | if (fd < 0) | |
b89446bb | 2417 | return errno == ENOENT ? -ENOSYS : -errno; |
d3782d60 | 2418 | |
9bf3b535 | 2419 | k = loop_read(fd, p, n, true); |
b89446bb LP |
2420 | if (k < 0) |
2421 | return (int) k; | |
2422 | if ((size_t) k != n) | |
2423 | return -EIO; | |
2424 | ||
2425 | return 0; | |
2426 | } | |
2427 | ||
2428 | void random_bytes(void *p, size_t n) { | |
2429 | static bool srand_called = false; | |
2430 | uint8_t *q; | |
2431 | int r; | |
d3782d60 | 2432 | |
b89446bb LP |
2433 | r = dev_urandom(p, n); |
2434 | if (r >= 0) | |
2435 | return; | |
d3782d60 | 2436 | |
b89446bb LP |
2437 | /* If some idiot made /dev/urandom unavailable to us, he'll |
2438 | * get a PRNG instead. */ | |
d3782d60 | 2439 | |
9bf3b535 | 2440 | if (!srand_called) { |
b89446bb | 2441 | unsigned x = 0; |
a3b6fafe | 2442 | |
9bf3b535 LP |
2443 | #ifdef HAVE_SYS_AUXV_H |
2444 | /* The kernel provides us with a bit of entropy in | |
2445 | * auxv, so let's try to make use of that to seed the | |
2446 | * pseudo-random generator. It's better than | |
2447 | * nothing... */ | |
a3b6fafe | 2448 | |
9bf3b535 LP |
2449 | void *auxv; |
2450 | ||
2451 | auxv = (void*) getauxval(AT_RANDOM); | |
2452 | if (auxv) | |
b89446bb | 2453 | x ^= *(unsigned*) auxv; |
9bf3b535 | 2454 | #endif |
a3b6fafe | 2455 | |
b89446bb LP |
2456 | x ^= (unsigned) now(CLOCK_REALTIME); |
2457 | x ^= (unsigned) gettid(); | |
2458 | ||
2459 | srand(x); | |
9bf3b535 LP |
2460 | srand_called = true; |
2461 | } | |
a3b6fafe | 2462 | |
9bf3b535 LP |
2463 | for (q = p; q < (uint8_t*) p + n; q ++) |
2464 | *q = rand(); | |
a3b6fafe LP |
2465 | } |
2466 | ||
5b6319dc LP |
2467 | void rename_process(const char name[8]) { |
2468 | assert(name); | |
2469 | ||
5d6b1584 LP |
2470 | /* This is a like a poor man's setproctitle(). It changes the |
2471 | * comm field, argv[0], and also the glibc's internally used | |
2472 | * name of the process. For the first one a limit of 16 chars | |
2473 | * applies, to the second one usually one of 10 (i.e. length | |
2474 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2475 | * "systemd"). If you pass a longer string it will be | |
2476 | * truncated */ | |
5b6319dc | 2477 | |
5d6b1584 | 2478 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2479 | |
2480 | if (program_invocation_name) | |
2481 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2482 | |
2483 | if (saved_argc > 0) { | |
2484 | int i; | |
2485 | ||
2486 | if (saved_argv[0]) | |
2487 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2488 | ||
2489 | for (i = 1; i < saved_argc; i++) { | |
2490 | if (!saved_argv[i]) | |
2491 | break; | |
2492 | ||
29804cc1 | 2493 | memzero(saved_argv[i], strlen(saved_argv[i])); |
9a0e6896 LP |
2494 | } |
2495 | } | |
5b6319dc LP |
2496 | } |
2497 | ||
7d793605 LP |
2498 | void sigset_add_many(sigset_t *ss, ...) { |
2499 | va_list ap; | |
2500 | int sig; | |
2501 | ||
2502 | assert(ss); | |
2503 | ||
2504 | va_start(ap, ss); | |
2505 | while ((sig = va_arg(ap, int)) > 0) | |
2506 | assert_se(sigaddset(ss, sig) == 0); | |
2507 | va_end(ap); | |
2508 | } | |
2509 | ||
856a5a7d LP |
2510 | int sigprocmask_many(int how, ...) { |
2511 | va_list ap; | |
2512 | sigset_t ss; | |
2513 | int sig; | |
2514 | ||
2515 | assert_se(sigemptyset(&ss) == 0); | |
2516 | ||
2517 | va_start(ap, how); | |
2518 | while ((sig = va_arg(ap, int)) > 0) | |
2519 | assert_se(sigaddset(&ss, sig) == 0); | |
2520 | va_end(ap); | |
2521 | ||
2522 | if (sigprocmask(how, &ss, NULL) < 0) | |
2523 | return -errno; | |
2524 | ||
2525 | return 0; | |
2526 | } | |
2527 | ||
ef2f1067 LP |
2528 | char* gethostname_malloc(void) { |
2529 | struct utsname u; | |
2530 | ||
2531 | assert_se(uname(&u) >= 0); | |
2532 | ||
344de609 | 2533 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2534 | return strdup(u.nodename); |
2535 | ||
2536 | return strdup(u.sysname); | |
2537 | } | |
2538 | ||
344de609 LP |
2539 | bool hostname_is_set(void) { |
2540 | struct utsname u; | |
2541 | ||
2542 | assert_se(uname(&u) >= 0); | |
2543 | ||
2544 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2545 | } | |
2546 | ||
7c5f152a | 2547 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2548 | long bufsize; |
a05f97b3 LP |
2549 | char *name; |
2550 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2551 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2552 | |
2553 | /* Shortcut things to avoid NSS lookups */ | |
2554 | if (uid == 0) | |
2555 | return strdup("root"); | |
2556 | ||
7c5f152a LP |
2557 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2558 | if (bufsize <= 0) | |
ef2f1067 LP |
2559 | bufsize = 4096; |
2560 | ||
7c5f152a LP |
2561 | buf = malloc(bufsize); |
2562 | if (!buf) | |
ef2f1067 LP |
2563 | return NULL; |
2564 | ||
a05f97b3 LP |
2565 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2566 | return strdup(pw->pw_name); | |
ef2f1067 | 2567 | |
de0671ee | 2568 | if (asprintf(&name, UID_FMT, uid) < 0) |
ef2f1067 LP |
2569 | return NULL; |
2570 | ||
2571 | return name; | |
2572 | } | |
2573 | ||
7c5f152a LP |
2574 | char* getlogname_malloc(void) { |
2575 | uid_t uid; | |
2576 | struct stat st; | |
2577 | ||
2578 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2579 | uid = st.st_uid; | |
2580 | else | |
2581 | uid = getuid(); | |
2582 | ||
2583 | return lookup_uid(uid); | |
2584 | } | |
2585 | ||
2586 | char *getusername_malloc(void) { | |
2587 | const char *e; | |
2588 | ||
2589 | e = getenv("USER"); | |
2590 | if (e) | |
2591 | return strdup(e); | |
2592 | ||
2593 | return lookup_uid(getuid()); | |
2594 | } | |
2595 | ||
fc116c6a LP |
2596 | int getttyname_malloc(int fd, char **r) { |
2597 | char path[PATH_MAX], *c; | |
618e02c7 | 2598 | int k; |
8c6db833 LP |
2599 | |
2600 | assert(r); | |
ef2f1067 | 2601 | |
a05f97b3 | 2602 | k = ttyname_r(fd, path, sizeof(path)); |
27373e44 | 2603 | if (k > 0) |
618e02c7 | 2604 | return -k; |
ef2f1067 LP |
2605 | |
2606 | char_array_0(path); | |
2607 | ||
a05f97b3 LP |
2608 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2609 | if (!c) | |
8c6db833 LP |
2610 | return -ENOMEM; |
2611 | ||
2612 | *r = c; | |
2613 | return 0; | |
2614 | } | |
2615 | ||
fc116c6a LP |
2616 | int getttyname_harder(int fd, char **r) { |
2617 | int k; | |
2618 | char *s; | |
2619 | ||
a05f97b3 LP |
2620 | k = getttyname_malloc(fd, &s); |
2621 | if (k < 0) | |
fc116c6a LP |
2622 | return k; |
2623 | ||
2624 | if (streq(s, "tty")) { | |
2625 | free(s); | |
4d6d6518 | 2626 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2627 | } |
2628 | ||
2629 | *r = s; | |
2630 | return 0; | |
2631 | } | |
2632 | ||
4d6d6518 | 2633 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
b4696bce SP |
2634 | int r; |
2635 | _cleanup_free_ char *line = NULL; | |
2636 | const char *p; | |
fc116c6a | 2637 | unsigned long ttynr; |
fc116c6a | 2638 | |
49aa47c7 | 2639 | assert(pid >= 0); |
49aa47c7 | 2640 | |
b4696bce SP |
2641 | p = procfs_file_alloca(pid, "stat"); |
2642 | r = read_one_line_file(p, &line); | |
2643 | if (r < 0) | |
2644 | return r; | |
fc116c6a | 2645 | |
4d6d6518 LP |
2646 | p = strrchr(line, ')'); |
2647 | if (!p) | |
fc116c6a LP |
2648 | return -EIO; |
2649 | ||
2650 | p++; | |
2651 | ||
2652 | if (sscanf(p, " " | |
2653 | "%*c " /* state */ | |
2654 | "%*d " /* ppid */ | |
2655 | "%*d " /* pgrp */ | |
2656 | "%*d " /* session */ | |
2657 | "%lu ", /* ttynr */ | |
2658 | &ttynr) != 1) | |
2659 | return -EIO; | |
2660 | ||
11dc5d2b LP |
2661 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2662 | return -ENOENT; | |
2663 | ||
0bee65f0 LP |
2664 | if (d) |
2665 | *d = (dev_t) ttynr; | |
2666 | ||
fc116c6a LP |
2667 | return 0; |
2668 | } | |
2669 | ||
4d6d6518 | 2670 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
833fce28 LP |
2671 | char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *b = NULL; |
2672 | _cleanup_free_ char *s = NULL; | |
2673 | const char *p; | |
fc116c6a | 2674 | dev_t devnr; |
833fce28 | 2675 | int k; |
fc116c6a LP |
2676 | |
2677 | assert(r); | |
2678 | ||
4d6d6518 LP |
2679 | k = get_ctty_devnr(pid, &devnr); |
2680 | if (k < 0) | |
fc116c6a LP |
2681 | return k; |
2682 | ||
2683 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
fc116c6a | 2684 | |
23406ce5 LP |
2685 | k = readlink_malloc(fn, &s); |
2686 | if (k < 0) { | |
fc116c6a LP |
2687 | |
2688 | if (k != -ENOENT) | |
2689 | return k; | |
2690 | ||
46824d0e LP |
2691 | /* This is an ugly hack */ |
2692 | if (major(devnr) == 136) { | |
de0671ee | 2693 | asprintf(&b, "pts/%u", minor(devnr)); |
833fce28 | 2694 | goto finish; |
46824d0e LP |
2695 | } |
2696 | ||
fc116c6a LP |
2697 | /* Probably something like the ptys which have no |
2698 | * symlink in /dev/char. Let's return something | |
2699 | * vaguely useful. */ | |
2700 | ||
23406ce5 | 2701 | b = strdup(fn + 5); |
833fce28 | 2702 | goto finish; |
fc116c6a LP |
2703 | } |
2704 | ||
2705 | if (startswith(s, "/dev/")) | |
2706 | p = s + 5; | |
2707 | else if (startswith(s, "../")) | |
2708 | p = s + 3; | |
2709 | else | |
2710 | p = s; | |
2711 | ||
2712 | b = strdup(p); | |
fc116c6a | 2713 | |
833fce28 | 2714 | finish: |
fc116c6a LP |
2715 | if (!b) |
2716 | return -ENOMEM; | |
2717 | ||
2718 | *r = b; | |
46824d0e LP |
2719 | if (_devnr) |
2720 | *_devnr = devnr; | |
2721 | ||
fc116c6a LP |
2722 | return 0; |
2723 | } | |
2724 | ||
f56d5db9 | 2725 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
dede0e33 | 2726 | _cleanup_closedir_ DIR *d = NULL; |
8c6db833 LP |
2727 | int ret = 0; |
2728 | ||
2729 | assert(fd >= 0); | |
2730 | ||
2731 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2732 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2733 | |
d4d046e3 LP |
2734 | d = fdopendir(fd); |
2735 | if (!d) { | |
03e334a1 | 2736 | safe_close(fd); |
4c633005 LP |
2737 | |
2738 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2739 | } |
2740 | ||
2741 | for (;;) { | |
7d5e9c0f | 2742 | struct dirent *de; |
7925c22a LP |
2743 | bool is_dir, keep_around; |
2744 | struct stat st; | |
8c6db833 LP |
2745 | int r; |
2746 | ||
3fd11280 FW |
2747 | errno = 0; |
2748 | de = readdir(d); | |
dede0e33 ZJS |
2749 | if (!de) { |
2750 | if (errno != 0 && ret == 0) | |
3fd11280 | 2751 | ret = -errno; |
dede0e33 | 2752 | return ret; |
8c6db833 LP |
2753 | } |
2754 | ||
8c6db833 LP |
2755 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) |
2756 | continue; | |
2757 | ||
7925c22a LP |
2758 | if (de->d_type == DT_UNKNOWN || |
2759 | honour_sticky || | |
2760 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2761 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2762 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2763 | ret = -errno; |
2764 | continue; | |
2765 | } | |
2766 | ||
2767 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2768 | keep_around = |
2769 | honour_sticky && | |
2770 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2771 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2772 | } else { |
8c6db833 | 2773 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2774 | keep_around = false; |
ad293f5a | 2775 | } |
8c6db833 LP |
2776 | |
2777 | if (is_dir) { | |
2778 | int subdir_fd; | |
8c6db833 | 2779 | |
597f43c7 | 2780 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
2781 | if (root_dev && st.st_dev != root_dev->st_dev) |
2782 | continue; | |
8c6db833 | 2783 | |
7925c22a LP |
2784 | subdir_fd = openat(fd, de->d_name, |
2785 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
2786 | if (subdir_fd < 0) { | |
2787 | if (ret == 0 && errno != ENOENT) | |
2788 | ret = -errno; | |
2789 | continue; | |
2790 | } | |
2791 | ||
b3d28469 | 2792 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
2793 | if (r < 0 && ret == 0) |
2794 | ret = r; | |
2795 | ||
2796 | if (!keep_around) | |
2797 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
2798 | if (ret == 0 && errno != ENOENT) |
2799 | ret = -errno; | |
2800 | } | |
2801 | ||
2802 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
2803 | |
2804 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 2805 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2806 | ret = -errno; |
2807 | } | |
2808 | } | |
2809 | } | |
8c6db833 LP |
2810 | } |
2811 | ||
44a6b1b6 | 2812 | _pure_ static int is_temporary_fs(struct statfs *s) { |
943aad8c | 2813 | assert(s); |
73020ab2 SL |
2814 | |
2815 | return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) || | |
2816 | F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC); | |
943aad8c ZJS |
2817 | } |
2818 | ||
f56d5db9 LP |
2819 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
2820 | struct statfs s; | |
2821 | ||
2822 | assert(fd >= 0); | |
2823 | ||
2824 | if (fstatfs(fd, &s) < 0) { | |
03e334a1 | 2825 | safe_close(fd); |
f56d5db9 LP |
2826 | return -errno; |
2827 | } | |
2828 | ||
2829 | /* We refuse to clean disk file systems with this call. This | |
2830 | * is extra paranoia just to be sure we never ever remove | |
2831 | * non-state data */ | |
943aad8c | 2832 | if (!is_temporary_fs(&s)) { |
f56d5db9 | 2833 | log_error("Attempted to remove disk file system, and we can't allow that."); |
03e334a1 | 2834 | safe_close(fd); |
f56d5db9 LP |
2835 | return -EPERM; |
2836 | } | |
2837 | ||
2838 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
2839 | } | |
2840 | ||
2841 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
2842 | int fd, r; | |
2843 | struct statfs s; | |
8c6db833 LP |
2844 | |
2845 | assert(path); | |
2846 | ||
f56d5db9 LP |
2847 | /* We refuse to clean the root file system with this |
2848 | * call. This is extra paranoia to never cause a really | |
2849 | * seriously broken system. */ | |
2850 | if (path_equal(path, "/")) { | |
2851 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
2852 | return -EPERM; | |
2853 | } | |
461b1822 | 2854 | |
d4d046e3 LP |
2855 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
2856 | if (fd < 0) { | |
8c6db833 LP |
2857 | |
2858 | if (errno != ENOTDIR) | |
2859 | return -errno; | |
2860 | ||
f56d5db9 LP |
2861 | if (!dangerous) { |
2862 | if (statfs(path, &s) < 0) | |
2863 | return -errno; | |
2864 | ||
943aad8c | 2865 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2866 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2867 | return -EPERM; | |
2868 | } | |
2869 | } | |
2870 | ||
8c6db833 | 2871 | if (delete_root && !only_dirs) |
d4d046e3 | 2872 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
2873 | return -errno; |
2874 | ||
2875 | return 0; | |
2876 | } | |
2877 | ||
f56d5db9 LP |
2878 | if (!dangerous) { |
2879 | if (fstatfs(fd, &s) < 0) { | |
03e334a1 | 2880 | safe_close(fd); |
f56d5db9 LP |
2881 | return -errno; |
2882 | } | |
ad293f5a | 2883 | |
943aad8c | 2884 | if (!is_temporary_fs(&s)) { |
f56d5db9 | 2885 | log_error("Attempted to remove disk file system, and we can't allow that."); |
03e334a1 | 2886 | safe_close(fd); |
f56d5db9 LP |
2887 | return -EPERM; |
2888 | } | |
2889 | } | |
2890 | ||
2891 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
2892 | if (delete_root) { |
2893 | ||
8d53b453 | 2894 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 2895 | return r; |
8c6db833 | 2896 | |
e27796a0 | 2897 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
2898 | if (r == 0) |
2899 | r = -errno; | |
2900 | } | |
ad293f5a | 2901 | } |
8c6db833 LP |
2902 | |
2903 | return r; | |
2904 | } | |
2905 | ||
f56d5db9 LP |
2906 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
2907 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
2908 | } | |
2909 | ||
2910 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
2911 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
2912 | } | |
2913 | ||
8c6db833 LP |
2914 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
2915 | assert(path); | |
2916 | ||
2917 | /* Under the assumption that we are running privileged we | |
2918 | * first change the access mode and only then hand out | |
2919 | * ownership to avoid a window where access is too open. */ | |
2920 | ||
8d53b453 LP |
2921 | if (mode != (mode_t) -1) |
2922 | if (chmod(path, mode) < 0) | |
2923 | return -errno; | |
8c6db833 | 2924 | |
8d53b453 LP |
2925 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2926 | if (chown(path, uid, gid) < 0) | |
2927 | return -errno; | |
8c6db833 LP |
2928 | |
2929 | return 0; | |
ef2f1067 LP |
2930 | } |
2931 | ||
f4b47811 LP |
2932 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
2933 | assert(fd >= 0); | |
2934 | ||
2935 | /* Under the assumption that we are running privileged we | |
2936 | * first change the access mode and only then hand out | |
2937 | * ownership to avoid a window where access is too open. */ | |
2938 | ||
9588bc32 LP |
2939 | if (mode != (mode_t) -1) |
2940 | if (fchmod(fd, mode) < 0) | |
2941 | return -errno; | |
f4b47811 | 2942 | |
9588bc32 LP |
2943 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2944 | if (fchown(fd, uid, gid) < 0) | |
2945 | return -errno; | |
f4b47811 LP |
2946 | |
2947 | return 0; | |
2948 | } | |
2949 | ||
82c121a4 LP |
2950 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2951 | cpu_set_t *r; | |
2952 | unsigned n = 1024; | |
2953 | ||
2954 | /* Allocates the cpuset in the right size */ | |
2955 | ||
2956 | for (;;) { | |
2957 | if (!(r = CPU_ALLOC(n))) | |
2958 | return NULL; | |
2959 | ||
2960 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2961 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2962 | ||
2963 | if (ncpus) | |
2964 | *ncpus = n; | |
2965 | ||
2966 | return r; | |
2967 | } | |
2968 | ||
2969 | CPU_FREE(r); | |
2970 | ||
2971 | if (errno != EINVAL) | |
2972 | return NULL; | |
2973 | ||
2974 | n *= 2; | |
2975 | } | |
2976 | } | |
2977 | ||
984a2be4 | 2978 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) { |
9ab7a8d2 | 2979 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
2980 | _cleanup_free_ char *s = NULL; |
2981 | _cleanup_close_ int fd = -1; | |
b92bea5d | 2982 | struct iovec iovec[6] = {}; |
81beb750 | 2983 | int n = 0; |
984a2be4 | 2984 | static bool prev_ephemeral; |
9e58ff9c LP |
2985 | |
2986 | assert(format); | |
2987 | ||
9ab7a8d2 | 2988 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
2989 | * optional and go exclusively to the console. */ |
2990 | ||
2991 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 2992 | return log_oom(); |
9e58ff9c | 2993 | |
67e5cc4f | 2994 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 2995 | if (fd < 0) |
669bec5d | 2996 | return fd; |
9e58ff9c | 2997 | |
67e5cc4f | 2998 | if (ellipse) { |
9ab7a8d2 MS |
2999 | char *e; |
3000 | size_t emax, sl; | |
3001 | int c; | |
3002 | ||
67e5cc4f LP |
3003 | c = fd_columns(fd); |
3004 | if (c <= 0) | |
3005 | c = 80; | |
81beb750 | 3006 | |
669bec5d | 3007 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
3008 | |
3009 | emax = c - sl - 1; | |
3010 | if (emax < 3) | |
3011 | emax = 3; | |
81beb750 | 3012 | |
67e5cc4f LP |
3013 | e = ellipsize(s, emax, 75); |
3014 | if (e) { | |
3015 | free(s); | |
3016 | s = e; | |
3017 | } | |
81beb750 LP |
3018 | } |
3019 | ||
984a2be4 MS |
3020 | if (prev_ephemeral) |
3021 | IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE); | |
3022 | prev_ephemeral = ephemeral; | |
3023 | ||
9ab7a8d2 MS |
3024 | if (status) { |
3025 | if (!isempty(status)) { | |
3026 | IOVEC_SET_STRING(iovec[n++], "["); | |
3027 | IOVEC_SET_STRING(iovec[n++], status); | |
3028 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3029 | } else | |
3030 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3031 | } |
3032 | ||
9ab7a8d2 | 3033 | IOVEC_SET_STRING(iovec[n++], s); |
984a2be4 MS |
3034 | if (!ephemeral) |
3035 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 3036 | |
669bec5d LP |
3037 | if (writev(fd, iovec, n) < 0) |
3038 | return -errno; | |
9e58ff9c | 3039 | |
669bec5d | 3040 | return 0; |
9e58ff9c LP |
3041 | } |
3042 | ||
984a2be4 | 3043 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) { |
c846ff47 | 3044 | va_list ap; |
669bec5d | 3045 | int r; |
c846ff47 LP |
3046 | |
3047 | assert(format); | |
3048 | ||
3049 | va_start(ap, format); | |
984a2be4 | 3050 | r = status_vprintf(status, ellipse, ephemeral, format, ap); |
c846ff47 | 3051 | va_end(ap); |
669bec5d LP |
3052 | |
3053 | return r; | |
c846ff47 LP |
3054 | } |
3055 | ||
fab56fc5 LP |
3056 | char *replace_env(const char *format, char **env) { |
3057 | enum { | |
3058 | WORD, | |
c24eb49e | 3059 | CURLY, |
fab56fc5 LP |
3060 | VARIABLE |
3061 | } state = WORD; | |
3062 | ||
3063 | const char *e, *word = format; | |
3064 | char *r = NULL, *k; | |
3065 | ||
3066 | assert(format); | |
3067 | ||
3068 | for (e = format; *e; e ++) { | |
3069 | ||
3070 | switch (state) { | |
3071 | ||
3072 | case WORD: | |
3073 | if (*e == '$') | |
c24eb49e | 3074 | state = CURLY; |
fab56fc5 LP |
3075 | break; |
3076 | ||
c24eb49e LP |
3077 | case CURLY: |
3078 | if (*e == '{') { | |
fab56fc5 LP |
3079 | if (!(k = strnappend(r, word, e-word-1))) |
3080 | goto fail; | |
3081 | ||
3082 | free(r); | |
3083 | r = k; | |
3084 | ||
3085 | word = e-1; | |
3086 | state = VARIABLE; | |
3087 | ||
3088 | } else if (*e == '$') { | |
3089 | if (!(k = strnappend(r, word, e-word))) | |
3090 | goto fail; | |
3091 | ||
3092 | free(r); | |
3093 | r = k; | |
3094 | ||
3095 | word = e+1; | |
3096 | state = WORD; | |
3097 | } else | |
3098 | state = WORD; | |
3099 | break; | |
3100 | ||
3101 | case VARIABLE: | |
c24eb49e | 3102 | if (*e == '}') { |
b95cf362 | 3103 | const char *t; |
fab56fc5 | 3104 | |
4d1a6904 | 3105 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 3106 | |
4d1a6904 LP |
3107 | k = strappend(r, t); |
3108 | if (!k) | |
b95cf362 | 3109 | goto fail; |
fab56fc5 | 3110 | |
b95cf362 LP |
3111 | free(r); |
3112 | r = k; | |
fab56fc5 | 3113 | |
b95cf362 | 3114 | word = e+1; |
fab56fc5 LP |
3115 | state = WORD; |
3116 | } | |
3117 | break; | |
3118 | } | |
3119 | } | |
3120 | ||
3121 | if (!(k = strnappend(r, word, e-word))) | |
3122 | goto fail; | |
3123 | ||
3124 | free(r); | |
3125 | return k; | |
3126 | ||
3127 | fail: | |
3128 | free(r); | |
3129 | return NULL; | |
3130 | } | |
3131 | ||
3132 | char **replace_env_argv(char **argv, char **env) { | |
3133 | char **r, **i; | |
c24eb49e LP |
3134 | unsigned k = 0, l = 0; |
3135 | ||
3136 | l = strv_length(argv); | |
fab56fc5 | 3137 | |
c24eb49e | 3138 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3139 | return NULL; |
3140 | ||
3141 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3142 | |
3143 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3144 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3145 | char *e; | |
3146 | char **w, **m; | |
3147 | unsigned q; | |
c24eb49e | 3148 | |
4d1a6904 LP |
3149 | e = strv_env_get(env, *i+1); |
3150 | if (e) { | |
c24eb49e LP |
3151 | |
3152 | if (!(m = strv_split_quoted(e))) { | |
3153 | r[k] = NULL; | |
3154 | strv_free(r); | |
3155 | return NULL; | |
3156 | } | |
b95cf362 LP |
3157 | } else |
3158 | m = NULL; | |
c24eb49e | 3159 | |
b95cf362 LP |
3160 | q = strv_length(m); |
3161 | l = l + q - 1; | |
c24eb49e | 3162 | |
b95cf362 LP |
3163 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3164 | r[k] = NULL; | |
3165 | strv_free(r); | |
3166 | strv_free(m); | |
3167 | return NULL; | |
3168 | } | |
c24eb49e | 3169 | |
b95cf362 LP |
3170 | r = w; |
3171 | if (m) { | |
c24eb49e LP |
3172 | memcpy(r + k, m, q * sizeof(char*)); |
3173 | free(m); | |
c24eb49e | 3174 | } |
b95cf362 LP |
3175 | |
3176 | k += q; | |
3177 | continue; | |
c24eb49e LP |
3178 | } |
3179 | ||
3180 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3181 | if (!(r[k++] = replace_env(*i, env))) { |
3182 | strv_free(r); | |
3183 | return NULL; | |
3184 | } | |
3185 | } | |
3186 | ||
3187 | r[k] = NULL; | |
3188 | return r; | |
3189 | } | |
3190 | ||
81beb750 | 3191 | int fd_columns(int fd) { |
b92bea5d | 3192 | struct winsize ws = {}; |
81beb750 LP |
3193 | |
3194 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3195 | return -errno; | |
3196 | ||
3197 | if (ws.ws_col <= 0) | |
3198 | return -EIO; | |
3199 | ||
3200 | return ws.ws_col; | |
3201 | } | |
3202 | ||
28917d7d | 3203 | unsigned columns(void) { |
fa776d8e | 3204 | const char *e; |
7009eec2 | 3205 | int c; |
fa776d8e | 3206 | |
28917d7d LP |
3207 | if (_likely_(cached_columns > 0)) |
3208 | return cached_columns; | |
11f96fac | 3209 | |
28917d7d LP |
3210 | c = 0; |
3211 | e = getenv("COLUMNS"); | |
3212 | if (e) | |
7009eec2 | 3213 | safe_atoi(e, &c); |
fa776d8e | 3214 | |
28917d7d LP |
3215 | if (c <= 0) |
3216 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3217 | |
28917d7d LP |
3218 | if (c <= 0) |
3219 | c = 80; | |
11f96fac | 3220 | |
28917d7d LP |
3221 | cached_columns = c; |
3222 | return c; | |
11f96fac ZJS |
3223 | } |
3224 | ||
8f2d43a0 | 3225 | int fd_lines(int fd) { |
b92bea5d | 3226 | struct winsize ws = {}; |
8f2d43a0 LP |
3227 | |
3228 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3229 | return -errno; | |
3230 | ||
3231 | if (ws.ws_row <= 0) | |
3232 | return -EIO; | |
3233 | ||
3234 | return ws.ws_row; | |
3235 | } | |
3236 | ||
3237 | unsigned lines(void) { | |
8f2d43a0 | 3238 | const char *e; |
ed757c0c | 3239 | unsigned l; |
8f2d43a0 | 3240 | |
ed757c0c LP |
3241 | if (_likely_(cached_lines > 0)) |
3242 | return cached_lines; | |
8f2d43a0 | 3243 | |
ed757c0c | 3244 | l = 0; |
8f2d43a0 LP |
3245 | e = getenv("LINES"); |
3246 | if (e) | |
ed757c0c | 3247 | safe_atou(e, &l); |
8f2d43a0 | 3248 | |
ed757c0c LP |
3249 | if (l <= 0) |
3250 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3251 | |
ed757c0c LP |
3252 | if (l <= 0) |
3253 | l = 24; | |
8f2d43a0 | 3254 | |
ed757c0c LP |
3255 | cached_lines = l; |
3256 | return cached_lines; | |
3257 | } | |
3258 | ||
3259 | /* intended to be used as a SIGWINCH sighandler */ | |
3260 | void columns_lines_cache_reset(int signum) { | |
3261 | cached_columns = 0; | |
3262 | cached_lines = 0; | |
3263 | } | |
3264 | ||
3265 | bool on_tty(void) { | |
3266 | static int cached_on_tty = -1; | |
3267 | ||
3268 | if (_unlikely_(cached_on_tty < 0)) | |
3269 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3270 | ||
3271 | return cached_on_tty; | |
8f2d43a0 LP |
3272 | } |
3273 | ||
9d9951a4 HH |
3274 | int files_same(const char *filea, const char *fileb) { |
3275 | struct stat a, b; | |
b4f10a5e | 3276 | |
9d9951a4 | 3277 | if (stat(filea, &a) < 0) |
b4f10a5e LP |
3278 | return -errno; |
3279 | ||
9d9951a4 | 3280 | if (stat(fileb, &b) < 0) |
b4f10a5e LP |
3281 | return -errno; |
3282 | ||
9d9951a4 HH |
3283 | return a.st_dev == b.st_dev && |
3284 | a.st_ino == b.st_ino; | |
3285 | } | |
3286 | ||
3287 | int running_in_chroot(void) { | |
3288 | int ret; | |
3289 | ||
3290 | ret = files_same("/proc/1/root", "/"); | |
3291 | if (ret < 0) | |
3292 | return ret; | |
3293 | ||
3294 | return ret == 0; | |
b4f10a5e LP |
3295 | } |
3296 | ||
f405e86d | 3297 | static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
72f59706 | 3298 | size_t x; |
8fe914ec LP |
3299 | char *r; |
3300 | ||
3301 | assert(s); | |
3302 | assert(percent <= 100); | |
72f59706 | 3303 | assert(new_length >= 3); |
8fe914ec | 3304 | |
72f59706 LP |
3305 | if (old_length <= 3 || old_length <= new_length) |
3306 | return strndup(s, old_length); | |
8fe914ec | 3307 | |
72f59706 LP |
3308 | r = new0(char, new_length+1); |
3309 | if (!r) | |
a6f0104a | 3310 | return NULL; |
8fe914ec | 3311 | |
72f59706 | 3312 | x = (new_length * percent) / 100; |
8fe914ec | 3313 | |
72f59706 LP |
3314 | if (x > new_length - 3) |
3315 | x = new_length - 3; | |
8fe914ec LP |
3316 | |
3317 | memcpy(r, s, x); | |
3318 | r[x] = '.'; | |
3319 | r[x+1] = '.'; | |
3320 | r[x+2] = '.'; | |
3321 | memcpy(r + x + 3, | |
72f59706 LP |
3322 | s + old_length - (new_length - x - 3), |
3323 | new_length - x - 3); | |
8fe914ec LP |
3324 | |
3325 | return r; | |
3326 | } | |
3327 | ||
f405e86d SL |
3328 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3329 | size_t x; | |
3330 | char *e; | |
3331 | const char *i, *j; | |
3332 | unsigned k, len, len2; | |
3333 | ||
3334 | assert(s); | |
3335 | assert(percent <= 100); | |
3336 | assert(new_length >= 3); | |
3337 | ||
3338 | /* if no multibyte characters use ascii_ellipsize_mem for speed */ | |
3339 | if (ascii_is_valid(s)) | |
3340 | return ascii_ellipsize_mem(s, old_length, new_length, percent); | |
3341 | ||
3342 | if (old_length <= 3 || old_length <= new_length) | |
3343 | return strndup(s, old_length); | |
3344 | ||
3345 | x = (new_length * percent) / 100; | |
3346 | ||
3347 | if (x > new_length - 3) | |
3348 | x = new_length - 3; | |
3349 | ||
3350 | k = 0; | |
3351 | for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) { | |
3352 | int c; | |
3353 | ||
3354 | c = utf8_encoded_to_unichar(i); | |
3355 | if (c < 0) | |
3356 | return NULL; | |
3357 | k += unichar_iswide(c) ? 2 : 1; | |
3358 | } | |
3359 | ||
3360 | if (k > x) /* last character was wide and went over quota */ | |
3361 | x ++; | |
3362 | ||
3363 | for (j = s + old_length; k < new_length && j > i; ) { | |
3364 | int c; | |
3365 | ||
3366 | j = utf8_prev_char(j); | |
3367 | c = utf8_encoded_to_unichar(j); | |
3368 | if (c < 0) | |
3369 | return NULL; | |
3370 | k += unichar_iswide(c) ? 2 : 1; | |
3371 | } | |
3372 | assert(i <= j); | |
3373 | ||
3374 | /* we don't actually need to ellipsize */ | |
3375 | if (i == j) | |
3376 | return memdup(s, old_length + 1); | |
3377 | ||
3378 | /* make space for ellipsis */ | |
3379 | j = utf8_next_char(j); | |
3380 | ||
3381 | len = i - s; | |
3382 | len2 = s + old_length - j; | |
3383 | e = new(char, len + 3 + len2 + 1); | |
3384 | if (!e) | |
3385 | return NULL; | |
3386 | ||
3387 | /* | |
3388 | printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n", | |
3389 | old_length, new_length, x, len, len2, k); | |
3390 | */ | |
3391 | ||
3392 | memcpy(e, s, len); | |
3393 | e[len] = 0xe2; /* tri-dot ellipsis: … */ | |
3394 | e[len + 1] = 0x80; | |
3395 | e[len + 2] = 0xa6; | |
3396 | ||
3397 | memcpy(e + len + 3, j, len2 + 1); | |
3398 | ||
3399 | return e; | |
3400 | } | |
3401 | ||
72f59706 LP |
3402 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3403 | return ellipsize_mem(s, strlen(s), length, percent); | |
3404 | } | |
3405 | ||
c38dfac9 | 3406 | int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode) { |
03e334a1 | 3407 | _cleanup_close_ int fd; |
c38dfac9 | 3408 | int r; |
f6144808 LP |
3409 | |
3410 | assert(path); | |
3411 | ||
c38dfac9 KS |
3412 | if (parents) |
3413 | mkdir_parents(path, 0755); | |
73836c5c | 3414 | |
c38dfac9 | 3415 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, mode > 0 ? mode : 0644); |
73836c5c | 3416 | if (fd < 0) |
f6144808 LP |
3417 | return -errno; |
3418 | ||
c38dfac9 KS |
3419 | if (mode > 0) { |
3420 | r = fchmod(fd, mode); | |
3421 | if (r < 0) | |
3422 | return -errno; | |
3423 | } | |
3424 | ||
359efc59 | 3425 | if (uid != (uid_t) -1 || gid != (gid_t) -1) { |
c38dfac9 KS |
3426 | r = fchown(fd, uid, gid); |
3427 | if (r < 0) | |
3428 | return -errno; | |
3429 | } | |
3430 | ||
3a43da28 | 3431 | if (stamp != USEC_INFINITY) { |
c38dfac9 KS |
3432 | struct timespec ts[2]; |
3433 | ||
3434 | timespec_store(&ts[0], stamp); | |
359efc59 | 3435 | ts[1] = ts[0]; |
c38dfac9 KS |
3436 | r = futimens(fd, ts); |
3437 | } else | |
3438 | r = futimens(fd, NULL); | |
3439 | if (r < 0) | |
3440 | return -errno; | |
3441 | ||
f6144808 LP |
3442 | return 0; |
3443 | } | |
afea26ad | 3444 | |
c38dfac9 | 3445 | int touch(const char *path) { |
3a43da28 | 3446 | return touch_file(path, false, USEC_INFINITY, (uid_t) -1, (gid_t) -1, 0); |
c38dfac9 KS |
3447 | } |
3448 | ||
97c4a07d | 3449 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3450 | size_t l; |
3451 | assert(s); | |
3452 | ||
73836c5c LP |
3453 | /* This is rather stupid, simply removes the heading and |
3454 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3455 | * escaping or anything. We should make this smarter one |
3456 | * day...*/ | |
73836c5c | 3457 | |
31ed59c5 LP |
3458 | l = strlen(s); |
3459 | if (l < 2) | |
11ce3427 LP |
3460 | return strdup(s); |
3461 | ||
97c4a07d | 3462 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3463 | return strndup(s+1, l-2); |
3464 | ||
3465 | return strdup(s); | |
3466 | } | |
3467 | ||
5f7c426e | 3468 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3469 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3470 | char *eq, *r; | |
5f7c426e | 3471 | |
57f30678 LP |
3472 | eq = strchr(s, '='); |
3473 | if (!eq) { | |
3474 | char *t; | |
5f7c426e | 3475 | |
57f30678 LP |
3476 | r = strdup(s); |
3477 | if (!r) | |
5f7c426e LP |
3478 | return NULL; |
3479 | ||
57f30678 LP |
3480 | t = strstrip(r); |
3481 | if (t == r) | |
3482 | return r; | |
3483 | ||
3484 | memmove(r, t, strlen(t) + 1); | |
3485 | return r; | |
5f7c426e LP |
3486 | } |
3487 | ||
57f30678 LP |
3488 | name = strndup(s, eq - s); |
3489 | if (!name) | |
5f7c426e LP |
3490 | return NULL; |
3491 | ||
57f30678 LP |
3492 | p = strdup(eq + 1); |
3493 | if (!p) | |
5f7c426e | 3494 | return NULL; |
5f7c426e LP |
3495 | |
3496 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3497 | if (!value) |
5f7c426e | 3498 | return NULL; |
5f7c426e | 3499 | |
57f30678 | 3500 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3501 | r = NULL; |
3502 | ||
5f7c426e LP |
3503 | return r; |
3504 | } | |
3505 | ||
8e12a6ae | 3506 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3507 | siginfo_t dummy; |
3508 | ||
2e78aa99 | 3509 | assert(pid >= 1); |
1968a360 LP |
3510 | |
3511 | if (!status) | |
3512 | status = &dummy; | |
2e78aa99 LP |
3513 | |
3514 | for (;;) { | |
8e12a6ae LP |
3515 | zero(*status); |
3516 | ||
3517 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3518 | |
3519 | if (errno == EINTR) | |
3520 | continue; | |
3521 | ||
3522 | return -errno; | |
3523 | } | |
3524 | ||
3525 | return 0; | |
3526 | } | |
3527 | } | |
3528 | ||
0659e8ba LS |
3529 | /* |
3530 | * Return values: | |
3531 | * < 0 : wait_for_terminate() failed to get the state of the | |
3532 | * process, the process was terminated by a signal, or | |
3533 | * failed for an unknown reason. | |
3534 | * >=0 : The process terminated normally, and its exit code is | |
3535 | * returned. | |
3536 | * | |
3537 | * That is, success is indicated by a return value of zero, and an | |
3538 | * error is indicated by a non-zero value. | |
3539 | */ | |
97c4a07d LP |
3540 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3541 | int r; | |
3542 | siginfo_t status; | |
3543 | ||
3544 | assert(name); | |
3545 | assert(pid > 1); | |
3546 | ||
d87be9b0 LP |
3547 | r = wait_for_terminate(pid, &status); |
3548 | if (r < 0) { | |
97c4a07d LP |
3549 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3550 | return r; | |
3551 | } | |
3552 | ||
3553 | if (status.si_code == CLD_EXITED) { | |
3554 | if (status.si_status != 0) { | |
3555 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3556 | return status.si_status; |
97c4a07d LP |
3557 | } |
3558 | ||
3559 | log_debug("%s succeeded.", name); | |
3560 | return 0; | |
3561 | ||
3562 | } else if (status.si_code == CLD_KILLED || | |
3563 | status.si_code == CLD_DUMPED) { | |
3564 | ||
3565 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3566 | return -EPROTO; | |
3567 | } | |
3568 | ||
3569 | log_warning("%s failed due to unknown reason.", name); | |
3570 | return -EPROTO; | |
97c4a07d LP |
3571 | } |
3572 | ||
919ce0b7 | 3573 | noreturn void freeze(void) { |
720ce21d LP |
3574 | |
3575 | /* Make sure nobody waits for us on a socket anymore */ | |
3576 | close_all_fds(NULL, 0); | |
3577 | ||
c29597a1 LP |
3578 | sync(); |
3579 | ||
3c14d26c LP |
3580 | for (;;) |
3581 | pause(); | |
3582 | } | |
3583 | ||
00dc5d76 LP |
3584 | bool null_or_empty(struct stat *st) { |
3585 | assert(st); | |
3586 | ||
3587 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3588 | return true; | |
3589 | ||
c8f26f42 | 3590 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3591 | return true; |
3592 | ||
3593 | return false; | |
3594 | } | |
3595 | ||
83096483 LP |
3596 | int null_or_empty_path(const char *fn) { |
3597 | struct stat st; | |
3598 | ||
3599 | assert(fn); | |
3600 | ||
3601 | if (stat(fn, &st) < 0) | |
3602 | return -errno; | |
3603 | ||
3604 | return null_or_empty(&st); | |
3605 | } | |
3606 | ||
ed88bcfb ZJS |
3607 | int null_or_empty_fd(int fd) { |
3608 | struct stat st; | |
3609 | ||
3610 | assert(fd >= 0); | |
3611 | ||
3612 | if (fstat(fd, &st) < 0) | |
3613 | return -errno; | |
3614 | ||
3615 | return null_or_empty(&st); | |
3616 | } | |
3617 | ||
a247755d | 3618 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3619 | int nfd; |
3620 | DIR *d; | |
3621 | ||
dd94c17e LP |
3622 | assert(!(flags & O_CREAT)); |
3623 | ||
3624 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
73836c5c | 3625 | if (nfd < 0) |
c4731d11 LP |
3626 | return NULL; |
3627 | ||
73836c5c LP |
3628 | d = fdopendir(nfd); |
3629 | if (!d) { | |
03e334a1 | 3630 | safe_close(nfd); |
c4731d11 LP |
3631 | return NULL; |
3632 | } | |
3633 | ||
3634 | return d; | |
3b63d2d3 LP |
3635 | } |
3636 | ||
8a0867d6 LP |
3637 | int signal_from_string_try_harder(const char *s) { |
3638 | int signo; | |
3639 | assert(s); | |
3640 | ||
73836c5c LP |
3641 | signo = signal_from_string(s); |
3642 | if (signo <= 0) | |
8a0867d6 LP |
3643 | if (startswith(s, "SIG")) |
3644 | return signal_from_string(s+3); | |
3645 | ||
3646 | return signo; | |
3647 | } | |
3648 | ||
383182b5 | 3649 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
22f5f628 | 3650 | _cleanup_free_ char *t = NULL, *u = NULL; |
22f5f628 | 3651 | size_t enc_len; |
e23a0ce8 | 3652 | |
383182b5 | 3653 | u = unquote(tagvalue, "\"\'"); |
6db615c1 | 3654 | if (!u) |
383182b5 | 3655 | return NULL; |
e23a0ce8 | 3656 | |
1d5989fd | 3657 | enc_len = strlen(u) * 4 + 1; |
22f5f628 | 3658 | t = new(char, enc_len); |
6db615c1 | 3659 | if (!t) |
383182b5 | 3660 | return NULL; |
e23a0ce8 | 3661 | |
8f6ce71f | 3662 | if (encode_devnode_name(u, t, enc_len) < 0) |
22f5f628 | 3663 | return NULL; |
e23a0ce8 | 3664 | |
6db615c1 | 3665 | return strjoin("/dev/disk/by-", by, "/", t, NULL); |
383182b5 | 3666 | } |
e23a0ce8 | 3667 | |
383182b5 | 3668 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3669 | assert(p); |
3670 | ||
383182b5 DR |
3671 | if (startswith(p, "LABEL=")) |
3672 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3673 | |
383182b5 DR |
3674 | if (startswith(p, "UUID=")) |
3675 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3676 | |
84cc2abf DR |
3677 | if (startswith(p, "PARTUUID=")) |
3678 | return tag_to_udev_node(p+9, "partuuid"); | |
3679 | ||
3680 | if (startswith(p, "PARTLABEL=")) | |
3681 | return tag_to_udev_node(p+10, "partlabel"); | |
3682 | ||
e23a0ce8 LP |
3683 | return strdup(p); |
3684 | } | |
3685 | ||
f212ac12 LP |
3686 | bool tty_is_vc(const char *tty) { |
3687 | assert(tty); | |
3688 | ||
98a28fef LP |
3689 | return vtnr_from_tty(tty) >= 0; |
3690 | } | |
3691 | ||
d1122ad5 LP |
3692 | bool tty_is_console(const char *tty) { |
3693 | assert(tty); | |
3694 | ||
3695 | if (startswith(tty, "/dev/")) | |
3696 | tty += 5; | |
3697 | ||
3698 | return streq(tty, "console"); | |
3699 | } | |
3700 | ||
98a28fef LP |
3701 | int vtnr_from_tty(const char *tty) { |
3702 | int i, r; | |
3703 | ||
3704 | assert(tty); | |
3705 | ||
3706 | if (startswith(tty, "/dev/")) | |
3707 | tty += 5; | |
3708 | ||
3709 | if (!startswith(tty, "tty") ) | |
3710 | return -EINVAL; | |
3711 | ||
3712 | if (tty[3] < '0' || tty[3] > '9') | |
3713 | return -EINVAL; | |
3714 | ||
3715 | r = safe_atoi(tty+3, &i); | |
3716 | if (r < 0) | |
3717 | return r; | |
3718 | ||
3719 | if (i < 0 || i > 63) | |
3720 | return -EINVAL; | |
3721 | ||
3722 | return i; | |
f212ac12 LP |
3723 | } |
3724 | ||
21baf21a MS |
3725 | char *resolve_dev_console(char **active) { |
3726 | char *tty; | |
3727 | ||
3728 | /* Resolve where /dev/console is pointing to, if /sys is actually ours | |
3729 | * (i.e. not read-only-mounted which is a sign for container setups) */ | |
3730 | ||
3731 | if (path_is_read_only_fs("/sys") > 0) | |
3732 | return NULL; | |
3733 | ||
3734 | if (read_one_line_file("/sys/class/tty/console/active", active) < 0) | |
3735 | return NULL; | |
3736 | ||
3737 | /* If multiple log outputs are configured the last one is what | |
3738 | * /dev/console points to */ | |
3739 | tty = strrchr(*active, ' '); | |
3740 | if (tty) | |
3741 | tty++; | |
3742 | else | |
3743 | tty = *active; | |
3744 | ||
8aa5429a OB |
3745 | if (streq(tty, "tty0")) { |
3746 | char *tmp; | |
3747 | ||
3748 | /* Get the active VC (e.g. tty1) */ | |
3749 | if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) { | |
3750 | free(*active); | |
3751 | tty = *active = tmp; | |
3752 | } | |
3753 | } | |
3754 | ||
21baf21a MS |
3755 | return tty; |
3756 | } | |
3757 | ||
3043935f | 3758 | bool tty_is_vc_resolve(const char *tty) { |
9588bc32 | 3759 | _cleanup_free_ char *active = NULL; |
3030ccd7 | 3760 | |
e3aa71c3 LP |
3761 | assert(tty); |
3762 | ||
3763 | if (startswith(tty, "/dev/")) | |
3764 | tty += 5; | |
3765 | ||
21baf21a MS |
3766 | if (streq(tty, "console")) { |
3767 | tty = resolve_dev_console(&active); | |
3768 | if (!tty) | |
3769 | return false; | |
3770 | } | |
3030ccd7 | 3771 | |
9588bc32 | 3772 | return tty_is_vc(tty); |
3043935f LP |
3773 | } |
3774 | ||
3775 | const char *default_term_for_tty(const char *tty) { | |
3776 | assert(tty); | |
3777 | ||
acda6a05 | 3778 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3779 | } |
3780 | ||
87d2c1ff | 3781 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3782 | assert(de); |
3783 | ||
3784 | if (ignore_file(de->d_name)) | |
3785 | return false; | |
3786 | ||
3787 | if (de->d_type != DT_REG && | |
3788 | de->d_type != DT_LNK && | |
3789 | de->d_type != DT_UNKNOWN) | |
3790 | return false; | |
3791 | ||
3792 | return true; | |
3793 | } | |
3794 | ||
87d2c1ff LP |
3795 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3796 | assert(de); | |
3797 | ||
a228a22f LP |
3798 | if (de->d_type != DT_REG && |
3799 | de->d_type != DT_LNK && | |
3800 | de->d_type != DT_UNKNOWN) | |
3801 | return false; | |
3802 | ||
3803 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3804 | return false; |
3805 | ||
3806 | return endswith(de->d_name, suffix); | |
3807 | } | |
3808 | ||
e2680723 | 3809 | void execute_directory(const char *directory, DIR *d, usec_t timeout, char *argv[]) { |
aa62a893 LP |
3810 | pid_t executor_pid; |
3811 | int r; | |
83cc030f LP |
3812 | |
3813 | assert(directory); | |
3814 | ||
aa62a893 LP |
3815 | /* Executes all binaries in a directory in parallel and waits |
3816 | * for them to finish. Optionally a timeout is applied. */ | |
83cc030f | 3817 | |
aa62a893 LP |
3818 | executor_pid = fork(); |
3819 | if (executor_pid < 0) { | |
3820 | log_error("Failed to fork: %m"); | |
3821 | return; | |
83cc030f | 3822 | |
aa62a893 LP |
3823 | } else if (executor_pid == 0) { |
3824 | _cleanup_hashmap_free_free_ Hashmap *pids = NULL; | |
3825 | _cleanup_closedir_ DIR *_d = NULL; | |
3826 | struct dirent *de; | |
3827 | sigset_t ss; | |
83cc030f | 3828 | |
aa62a893 LP |
3829 | /* We fork this all off from a child process so that |
3830 | * we can somewhat cleanly make use of SIGALRM to set | |
3831 | * a time limit */ | |
83cc030f | 3832 | |
aa62a893 | 3833 | reset_all_signal_handlers(); |
83cc030f | 3834 | |
aa62a893 LP |
3835 | assert_se(sigemptyset(&ss) == 0); |
3836 | assert_se(sigprocmask(SIG_SETMASK, &ss, NULL) == 0); | |
83cc030f | 3837 | |
aa62a893 | 3838 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 3839 | |
aa62a893 LP |
3840 | if (!d) { |
3841 | d = _d = opendir(directory); | |
3842 | if (!d) { | |
3843 | if (errno == ENOENT) | |
3844 | _exit(EXIT_SUCCESS); | |
83cc030f | 3845 | |
aa62a893 LP |
3846 | log_error("Failed to enumerate directory %s: %m", directory); |
3847 | _exit(EXIT_FAILURE); | |
3848 | } | |
83cc030f LP |
3849 | } |
3850 | ||
aa62a893 LP |
3851 | pids = hashmap_new(NULL, NULL); |
3852 | if (!pids) { | |
3853 | log_oom(); | |
3854 | _exit(EXIT_FAILURE); | |
83cc030f LP |
3855 | } |
3856 | ||
aa62a893 LP |
3857 | FOREACH_DIRENT(de, d, break) { |
3858 | _cleanup_free_ char *path = NULL; | |
3859 | pid_t pid; | |
83cc030f | 3860 | |
aa62a893 LP |
3861 | if (!dirent_is_file(de)) |
3862 | continue; | |
83cc030f | 3863 | |
418b9be5 LP |
3864 | path = strjoin(directory, "/", de->d_name, NULL); |
3865 | if (!path) { | |
aa62a893 LP |
3866 | log_oom(); |
3867 | _exit(EXIT_FAILURE); | |
3868 | } | |
83cc030f | 3869 | |
aa62a893 LP |
3870 | pid = fork(); |
3871 | if (pid < 0) { | |
3872 | log_error("Failed to fork: %m"); | |
3873 | continue; | |
3874 | } else if (pid == 0) { | |
3875 | char *_argv[2]; | |
83cc030f | 3876 | |
aa62a893 | 3877 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 3878 | |
aa62a893 LP |
3879 | if (!argv) { |
3880 | _argv[0] = path; | |
3881 | _argv[1] = NULL; | |
3882 | argv = _argv; | |
3883 | } else | |
3884 | argv[0] = path; | |
83cc030f | 3885 | |
aa62a893 LP |
3886 | execv(path, argv); |
3887 | log_error("Failed to execute %s: %m", path); | |
3888 | _exit(EXIT_FAILURE); | |
3889 | } | |
83cc030f | 3890 | |
83cc030f | 3891 | |
aa62a893 | 3892 | log_debug("Spawned %s as " PID_FMT ".", path, pid); |
83cc030f | 3893 | |
aa62a893 LP |
3894 | r = hashmap_put(pids, UINT_TO_PTR(pid), path); |
3895 | if (r < 0) { | |
3896 | log_oom(); | |
3897 | _exit(EXIT_FAILURE); | |
3898 | } | |
3899 | ||
3900 | path = NULL; | |
83cc030f LP |
3901 | } |
3902 | ||
aa62a893 LP |
3903 | /* Abort execution of this process after the |
3904 | * timout. We simply rely on SIGALRM as default action | |
3905 | * terminating the process, and turn on alarm(). */ | |
3906 | ||
3a43da28 | 3907 | if (timeout != USEC_INFINITY) |
aa62a893 LP |
3908 | alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC); |
3909 | ||
3910 | while (!hashmap_isempty(pids)) { | |
3911 | _cleanup_free_ char *path = NULL; | |
3912 | pid_t pid; | |
3913 | ||
3914 | pid = PTR_TO_UINT(hashmap_first_key(pids)); | |
3915 | assert(pid > 0); | |
83cc030f | 3916 | |
aa62a893 LP |
3917 | path = hashmap_remove(pids, UINT_TO_PTR(pid)); |
3918 | assert(path); | |
3919 | ||
3920 | wait_for_terminate_and_warn(path, pid); | |
83cc030f | 3921 | } |
83cc030f | 3922 | |
aa62a893 LP |
3923 | _exit(EXIT_SUCCESS); |
3924 | } | |
83cc030f | 3925 | |
aa62a893 | 3926 | wait_for_terminate_and_warn(directory, executor_pid); |
83cc030f LP |
3927 | } |
3928 | ||
430c18ed LP |
3929 | int kill_and_sigcont(pid_t pid, int sig) { |
3930 | int r; | |
3931 | ||
3932 | r = kill(pid, sig) < 0 ? -errno : 0; | |
3933 | ||
3934 | if (r >= 0) | |
3935 | kill(pid, SIGCONT); | |
3936 | ||
3937 | return r; | |
3938 | } | |
3939 | ||
05feefe0 LP |
3940 | bool nulstr_contains(const char*nulstr, const char *needle) { |
3941 | const char *i; | |
3942 | ||
3943 | if (!nulstr) | |
3944 | return false; | |
3945 | ||
3946 | NULSTR_FOREACH(i, nulstr) | |
3947 | if (streq(i, needle)) | |
3948 | return true; | |
3949 | ||
3950 | return false; | |
3951 | } | |
3952 | ||
6faa1114 | 3953 | bool plymouth_running(void) { |
9408a2d2 | 3954 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
3955 | } |
3956 | ||
9beb3f4d LP |
3957 | char* strshorten(char *s, size_t l) { |
3958 | assert(s); | |
3959 | ||
3960 | if (l < strlen(s)) | |
3961 | s[l] = 0; | |
3962 | ||
3963 | return s; | |
3964 | } | |
3965 | ||
3966 | static bool hostname_valid_char(char c) { | |
3967 | return | |
3968 | (c >= 'a' && c <= 'z') || | |
3969 | (c >= 'A' && c <= 'Z') || | |
3970 | (c >= '0' && c <= '9') || | |
3971 | c == '-' || | |
3972 | c == '_' || | |
3973 | c == '.'; | |
3974 | } | |
3975 | ||
3976 | bool hostname_is_valid(const char *s) { | |
3977 | const char *p; | |
aa3c5cf8 | 3978 | bool dot; |
9beb3f4d LP |
3979 | |
3980 | if (isempty(s)) | |
3981 | return false; | |
3982 | ||
aa3c5cf8 LP |
3983 | for (p = s, dot = true; *p; p++) { |
3984 | if (*p == '.') { | |
3985 | if (dot) | |
3986 | return false; | |
3987 | ||
3988 | dot = true; | |
3989 | } else { | |
3990 | if (!hostname_valid_char(*p)) | |
3991 | return false; | |
3992 | ||
3993 | dot = false; | |
3994 | } | |
3995 | } | |
3996 | ||
3997 | if (dot) | |
3998 | return false; | |
9beb3f4d LP |
3999 | |
4000 | if (p-s > HOST_NAME_MAX) | |
4001 | return false; | |
4002 | ||
4003 | return true; | |
4004 | } | |
4005 | ||
e724b063 | 4006 | char* hostname_cleanup(char *s, bool lowercase) { |
9beb3f4d | 4007 | char *p, *d; |
cec4ead9 LP |
4008 | bool dot; |
4009 | ||
4010 | for (p = s, d = s, dot = true; *p; p++) { | |
4011 | if (*p == '.') { | |
e724b063 | 4012 | if (dot) |
cec4ead9 | 4013 | continue; |
9beb3f4d | 4014 | |
e724b063 | 4015 | *(d++) = '.'; |
cec4ead9 | 4016 | dot = true; |
e724b063 LP |
4017 | } else if (hostname_valid_char(*p)) { |
4018 | *(d++) = lowercase ? tolower(*p) : *p; | |
cec4ead9 | 4019 | dot = false; |
e724b063 | 4020 | } |
cec4ead9 | 4021 | |
cec4ead9 | 4022 | } |
9beb3f4d | 4023 | |
e724b063 LP |
4024 | if (dot && d > s) |
4025 | d[-1] = 0; | |
4026 | else | |
4027 | *d = 0; | |
4028 | ||
9beb3f4d | 4029 | strshorten(s, HOST_NAME_MAX); |
cec4ead9 | 4030 | |
9beb3f4d LP |
4031 | return s; |
4032 | } | |
4033 | ||
7f0d207d LP |
4034 | bool machine_name_is_valid(const char *s) { |
4035 | ||
4036 | if (!hostname_is_valid(s)) | |
4037 | return false; | |
4038 | ||
4039 | /* Machine names should be useful hostnames, but also be | |
4040 | * useful in unit names, hence we enforce a stricter length | |
4041 | * limitation. */ | |
4042 | ||
4043 | if (strlen(s) > 64) | |
4044 | return false; | |
4045 | ||
4046 | return true; | |
4047 | } | |
4048 | ||
1325aa42 | 4049 | int pipe_eof(int fd) { |
b92bea5d ZJS |
4050 | struct pollfd pollfd = { |
4051 | .fd = fd, | |
4052 | .events = POLLIN|POLLHUP, | |
4053 | }; | |
1325aa42 | 4054 | |
d37a91e8 LP |
4055 | int r; |
4056 | ||
1325aa42 LP |
4057 | r = poll(&pollfd, 1, 0); |
4058 | if (r < 0) | |
4059 | return -errno; | |
4060 | ||
4061 | if (r == 0) | |
4062 | return 0; | |
4063 | ||
4064 | return pollfd.revents & POLLHUP; | |
4065 | } | |
4066 | ||
8f2d43a0 | 4067 | int fd_wait_for_event(int fd, int event, usec_t t) { |
968d3d24 | 4068 | |
b92bea5d ZJS |
4069 | struct pollfd pollfd = { |
4070 | .fd = fd, | |
4071 | .events = event, | |
4072 | }; | |
df50185b | 4073 | |
968d3d24 LP |
4074 | struct timespec ts; |
4075 | int r; | |
4076 | ||
3a43da28 | 4077 | r = ppoll(&pollfd, 1, t == USEC_INFINITY ? NULL : timespec_store(&ts, t), NULL); |
df50185b LP |
4078 | if (r < 0) |
4079 | return -errno; | |
4080 | ||
4081 | if (r == 0) | |
4082 | return 0; | |
4083 | ||
4084 | return pollfd.revents; | |
4085 | } | |
4086 | ||
5a3ab509 LP |
4087 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4088 | FILE *f; | |
4089 | char *t; | |
5a3ab509 LP |
4090 | int fd; |
4091 | ||
4092 | assert(path); | |
4093 | assert(_f); | |
4094 | assert(_temp_path); | |
4095 | ||
2e78fa79 | 4096 | t = tempfn_xxxxxx(path); |
5a3ab509 LP |
4097 | if (!t) |
4098 | return -ENOMEM; | |
4099 | ||
2d5bdf5b | 4100 | fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC); |
5a3ab509 LP |
4101 | if (fd < 0) { |
4102 | free(t); | |
4103 | return -errno; | |
4104 | } | |
4105 | ||
4106 | f = fdopen(fd, "we"); | |
4107 | if (!f) { | |
4108 | unlink(t); | |
4109 | free(t); | |
4110 | return -errno; | |
4111 | } | |
4112 | ||
4113 | *_f = f; | |
4114 | *_temp_path = t; | |
4115 | ||
4116 | return 0; | |
4117 | } | |
4118 | ||
6ea832a2 | 4119 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4120 | assert(fd >= 0); |
4121 | ||
6ea832a2 LP |
4122 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4123 | return -errno; | |
4124 | ||
4125 | return 0; | |
4126 | } | |
4127 | ||
4128 | int terminal_vhangup(const char *name) { | |
03e334a1 | 4129 | _cleanup_close_ int fd; |
6ea832a2 LP |
4130 | |
4131 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4132 | if (fd < 0) | |
4133 | return fd; | |
4134 | ||
03e334a1 | 4135 | return terminal_vhangup_fd(fd); |
6ea832a2 LP |
4136 | } |
4137 | ||
4138 | int vt_disallocate(const char *name) { | |
4139 | int fd, r; | |
4140 | unsigned u; | |
6ea832a2 LP |
4141 | |
4142 | /* Deallocate the VT if possible. If not possible | |
4143 | * (i.e. because it is the active one), at least clear it | |
4144 | * entirely (including the scrollback buffer) */ | |
4145 | ||
b83bc4e9 LP |
4146 | if (!startswith(name, "/dev/")) |
4147 | return -EINVAL; | |
4148 | ||
4149 | if (!tty_is_vc(name)) { | |
4150 | /* So this is not a VT. I guess we cannot deallocate | |
4151 | * it then. But let's at least clear the screen */ | |
4152 | ||
4153 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4154 | if (fd < 0) | |
4155 | return fd; | |
4156 | ||
8585357a LP |
4157 | loop_write(fd, |
4158 | "\033[r" /* clear scrolling region */ | |
4159 | "\033[H" /* move home */ | |
4160 | "\033[2J", /* clear screen */ | |
4161 | 10, false); | |
03e334a1 | 4162 | safe_close(fd); |
b83bc4e9 LP |
4163 | |
4164 | return 0; | |
4165 | } | |
6ea832a2 LP |
4166 | |
4167 | if (!startswith(name, "/dev/tty")) | |
4168 | return -EINVAL; | |
4169 | ||
4170 | r = safe_atou(name+8, &u); | |
4171 | if (r < 0) | |
4172 | return r; | |
4173 | ||
4174 | if (u <= 0) | |
b83bc4e9 | 4175 | return -EINVAL; |
6ea832a2 | 4176 | |
b83bc4e9 | 4177 | /* Try to deallocate */ |
6ea832a2 LP |
4178 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4179 | if (fd < 0) | |
4180 | return fd; | |
4181 | ||
4182 | r = ioctl(fd, VT_DISALLOCATE, u); | |
03e334a1 | 4183 | safe_close(fd); |
6ea832a2 | 4184 | |
b83bc4e9 LP |
4185 | if (r >= 0) |
4186 | return 0; | |
6ea832a2 | 4187 | |
b83bc4e9 | 4188 | if (errno != EBUSY) |
6ea832a2 | 4189 | return -errno; |
6ea832a2 | 4190 | |
b83bc4e9 LP |
4191 | /* Couldn't deallocate, so let's clear it fully with |
4192 | * scrollback */ | |
4193 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4194 | if (fd < 0) |
b83bc4e9 | 4195 | return fd; |
6ea832a2 | 4196 | |
8585357a LP |
4197 | loop_write(fd, |
4198 | "\033[r" /* clear scrolling region */ | |
4199 | "\033[H" /* move home */ | |
4200 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4201 | 10, false); | |
03e334a1 | 4202 | safe_close(fd); |
6ea832a2 | 4203 | |
b83bc4e9 | 4204 | return 0; |
6ea832a2 LP |
4205 | } |
4206 | ||
424a19f8 | 4207 | int symlink_atomic(const char *from, const char *to) { |
2e78fa79 | 4208 | _cleanup_free_ char *t = NULL; |
34ca941c LP |
4209 | |
4210 | assert(from); | |
4211 | assert(to); | |
4212 | ||
2e78fa79 | 4213 | t = tempfn_random(to); |
34ca941c LP |
4214 | if (!t) |
4215 | return -ENOMEM; | |
4216 | ||
424a19f8 LP |
4217 | if (symlink(from, t) < 0) |
4218 | return -errno; | |
34ca941c LP |
4219 | |
4220 | if (rename(t, to) < 0) { | |
2e78fa79 LP |
4221 | unlink_noerrno(t); |
4222 | return -errno; | |
34ca941c LP |
4223 | } |
4224 | ||
424a19f8 | 4225 | return 0; |
34ca941c LP |
4226 | } |
4227 | ||
1554afae LP |
4228 | int mknod_atomic(const char *path, mode_t mode, dev_t dev) { |
4229 | _cleanup_free_ char *t = NULL; | |
4230 | ||
4231 | assert(path); | |
4232 | ||
4233 | t = tempfn_random(path); | |
4234 | if (!t) | |
4235 | return -ENOMEM; | |
4236 | ||
4237 | if (mknod(t, mode, dev) < 0) | |
4238 | return -errno; | |
4239 | ||
4240 | if (rename(t, path) < 0) { | |
4241 | unlink_noerrno(t); | |
4242 | return -errno; | |
4243 | } | |
4244 | ||
4245 | return 0; | |
4246 | } | |
4247 | ||
4248 | int mkfifo_atomic(const char *path, mode_t mode) { | |
4249 | _cleanup_free_ char *t = NULL; | |
4250 | ||
4251 | assert(path); | |
4252 | ||
4253 | t = tempfn_random(path); | |
4254 | if (!t) | |
4255 | return -ENOMEM; | |
4256 | ||
4257 | if (mkfifo(t, mode) < 0) | |
4258 | return -errno; | |
4259 | ||
4260 | if (rename(t, path) < 0) { | |
4261 | unlink_noerrno(t); | |
4262 | return -errno; | |
4263 | } | |
4264 | ||
4265 | return 0; | |
4266 | } | |
4267 | ||
4d6d6518 LP |
4268 | bool display_is_local(const char *display) { |
4269 | assert(display); | |
4270 | ||
4271 | return | |
4272 | display[0] == ':' && | |
4273 | display[1] >= '0' && | |
4274 | display[1] <= '9'; | |
4275 | } | |
4276 | ||
4277 | int socket_from_display(const char *display, char **path) { | |
4278 | size_t k; | |
4279 | char *f, *c; | |
4280 | ||
4281 | assert(display); | |
4282 | assert(path); | |
4283 | ||
4284 | if (!display_is_local(display)) | |
4285 | return -EINVAL; | |
4286 | ||
4287 | k = strspn(display+1, "0123456789"); | |
4288 | ||
f8294e41 | 4289 | f = new(char, strlen("/tmp/.X11-unix/X") + k + 1); |
4d6d6518 LP |
4290 | if (!f) |
4291 | return -ENOMEM; | |
4292 | ||
4293 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4294 | memcpy(c, display+1, k); | |
4295 | c[k] = 0; | |
4296 | ||
4297 | *path = f; | |
4298 | ||
4299 | return 0; | |
4300 | } | |
4301 | ||
d05c5031 LP |
4302 | int get_user_creds( |
4303 | const char **username, | |
4304 | uid_t *uid, gid_t *gid, | |
4305 | const char **home, | |
4306 | const char **shell) { | |
4307 | ||
1cccf435 | 4308 | struct passwd *p; |
ddd88763 | 4309 | uid_t u; |
1cccf435 MV |
4310 | |
4311 | assert(username); | |
4312 | assert(*username); | |
1cccf435 MV |
4313 | |
4314 | /* We enforce some special rules for uid=0: in order to avoid | |
4315 | * NSS lookups for root we hardcode its data. */ | |
4316 | ||
4317 | if (streq(*username, "root") || streq(*username, "0")) { | |
4318 | *username = "root"; | |
4b67834e LP |
4319 | |
4320 | if (uid) | |
4321 | *uid = 0; | |
4322 | ||
4323 | if (gid) | |
4324 | *gid = 0; | |
4325 | ||
4326 | if (home) | |
4327 | *home = "/root"; | |
d05c5031 LP |
4328 | |
4329 | if (shell) | |
4330 | *shell = "/bin/sh"; | |
4331 | ||
1cccf435 MV |
4332 | return 0; |
4333 | } | |
4334 | ||
ddd88763 | 4335 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4336 | errno = 0; |
ddd88763 | 4337 | p = getpwuid(u); |
1cccf435 MV |
4338 | |
4339 | /* If there are multiple users with the same id, make | |
4340 | * sure to leave $USER to the configured value instead | |
4341 | * of the first occurrence in the database. However if | |
4342 | * the uid was configured by a numeric uid, then let's | |
4343 | * pick the real username from /etc/passwd. */ | |
4344 | if (p) | |
4345 | *username = p->pw_name; | |
4346 | } else { | |
4347 | errno = 0; | |
4348 | p = getpwnam(*username); | |
4349 | } | |
4350 | ||
4351 | if (!p) | |
8333c77e | 4352 | return errno > 0 ? -errno : -ESRCH; |
1cccf435 | 4353 | |
4b67834e LP |
4354 | if (uid) |
4355 | *uid = p->pw_uid; | |
4356 | ||
4357 | if (gid) | |
4358 | *gid = p->pw_gid; | |
4359 | ||
4360 | if (home) | |
4361 | *home = p->pw_dir; | |
4362 | ||
d05c5031 LP |
4363 | if (shell) |
4364 | *shell = p->pw_shell; | |
4365 | ||
4b67834e LP |
4366 | return 0; |
4367 | } | |
4368 | ||
59164be4 LP |
4369 | char* uid_to_name(uid_t uid) { |
4370 | struct passwd *p; | |
4371 | char *r; | |
4372 | ||
4373 | if (uid == 0) | |
4374 | return strdup("root"); | |
4375 | ||
4376 | p = getpwuid(uid); | |
4377 | if (p) | |
4378 | return strdup(p->pw_name); | |
4379 | ||
de0671ee | 4380 | if (asprintf(&r, UID_FMT, uid) < 0) |
59164be4 LP |
4381 | return NULL; |
4382 | ||
4383 | return r; | |
4384 | } | |
4385 | ||
4468addc LP |
4386 | char* gid_to_name(gid_t gid) { |
4387 | struct group *p; | |
4388 | char *r; | |
4389 | ||
4390 | if (gid == 0) | |
4391 | return strdup("root"); | |
4392 | ||
4393 | p = getgrgid(gid); | |
4394 | if (p) | |
4395 | return strdup(p->gr_name); | |
4396 | ||
de0671ee | 4397 | if (asprintf(&r, GID_FMT, gid) < 0) |
4468addc LP |
4398 | return NULL; |
4399 | ||
4400 | return r; | |
4401 | } | |
4402 | ||
4b67834e LP |
4403 | int get_group_creds(const char **groupname, gid_t *gid) { |
4404 | struct group *g; | |
4405 | gid_t id; | |
4406 | ||
4407 | assert(groupname); | |
4408 | ||
4409 | /* We enforce some special rules for gid=0: in order to avoid | |
4410 | * NSS lookups for root we hardcode its data. */ | |
4411 | ||
4412 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4413 | *groupname = "root"; | |
4414 | ||
4415 | if (gid) | |
4416 | *gid = 0; | |
4417 | ||
4418 | return 0; | |
4419 | } | |
4420 | ||
4421 | if (parse_gid(*groupname, &id) >= 0) { | |
4422 | errno = 0; | |
4423 | g = getgrgid(id); | |
4424 | ||
4425 | if (g) | |
4426 | *groupname = g->gr_name; | |
4427 | } else { | |
4428 | errno = 0; | |
4429 | g = getgrnam(*groupname); | |
4430 | } | |
4431 | ||
4432 | if (!g) | |
8333c77e | 4433 | return errno > 0 ? -errno : -ESRCH; |
4b67834e LP |
4434 | |
4435 | if (gid) | |
4436 | *gid = g->gr_gid; | |
4437 | ||
1cccf435 MV |
4438 | return 0; |
4439 | } | |
4440 | ||
4468addc LP |
4441 | int in_gid(gid_t gid) { |
4442 | gid_t *gids; | |
43673799 LP |
4443 | int ngroups_max, r, i; |
4444 | ||
43673799 LP |
4445 | if (getgid() == gid) |
4446 | return 1; | |
4447 | ||
4448 | if (getegid() == gid) | |
4449 | return 1; | |
4450 | ||
4451 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4452 | assert(ngroups_max > 0); | |
4453 | ||
4454 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4455 | ||
4456 | r = getgroups(ngroups_max, gids); | |
4457 | if (r < 0) | |
4458 | return -errno; | |
4459 | ||
4460 | for (i = 0; i < r; i++) | |
4461 | if (gids[i] == gid) | |
4462 | return 1; | |
4463 | ||
4464 | return 0; | |
4465 | } | |
4466 | ||
4468addc LP |
4467 | int in_group(const char *name) { |
4468 | int r; | |
4469 | gid_t gid; | |
4470 | ||
4471 | r = get_group_creds(&name, &gid); | |
4472 | if (r < 0) | |
4473 | return r; | |
4474 | ||
4475 | return in_gid(gid); | |
4476 | } | |
4477 | ||
8092a428 | 4478 | int glob_exists(const char *path) { |
7fd1b19b | 4479 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 4480 | int k; |
8092a428 LP |
4481 | |
4482 | assert(path); | |
4483 | ||
8092a428 LP |
4484 | errno = 0; |
4485 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4486 | ||
4487 | if (k == GLOB_NOMATCH) | |
8d98da3f | 4488 | return 0; |
8092a428 | 4489 | else if (k == GLOB_NOSPACE) |
8d98da3f | 4490 | return -ENOMEM; |
8092a428 | 4491 | else if (k == 0) |
8d98da3f | 4492 | return !strv_isempty(g.gl_pathv); |
8092a428 | 4493 | else |
8d98da3f ZJS |
4494 | return errno ? -errno : -EIO; |
4495 | } | |
8092a428 | 4496 | |
8d98da3f ZJS |
4497 | int glob_extend(char ***strv, const char *path) { |
4498 | _cleanup_globfree_ glob_t g = {}; | |
4499 | int k; | |
4500 | char **p; | |
4501 | ||
4502 | errno = 0; | |
a8ccacf5 | 4503 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
4504 | |
4505 | if (k == GLOB_NOMATCH) | |
4506 | return -ENOENT; | |
4507 | else if (k == GLOB_NOSPACE) | |
4508 | return -ENOMEM; | |
4509 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
4510 | return errno ? -errno : -EIO; | |
4511 | ||
4512 | STRV_FOREACH(p, g.gl_pathv) { | |
4513 | k = strv_extend(strv, *p); | |
4514 | if (k < 0) | |
4515 | break; | |
4516 | } | |
4517 | ||
4518 | return k; | |
8092a428 LP |
4519 | } |
4520 | ||
83096483 LP |
4521 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4522 | struct stat st; | |
4523 | ||
4524 | assert(d); | |
4525 | assert(de); | |
4526 | ||
4527 | if (de->d_type != DT_UNKNOWN) | |
4528 | return 0; | |
4529 | ||
4530 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4531 | return -errno; | |
4532 | ||
4533 | de->d_type = | |
4534 | S_ISREG(st.st_mode) ? DT_REG : | |
4535 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4536 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4537 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4538 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4539 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4540 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4541 | DT_UNKNOWN; | |
4542 | ||
4543 | return 0; | |
4544 | } | |
4545 | ||
034a2a52 | 4546 | int get_files_in_directory(const char *path, char ***list) { |
893fa014 ZJS |
4547 | _cleanup_closedir_ DIR *d = NULL; |
4548 | size_t bufsize = 0, n = 0; | |
4549 | _cleanup_strv_free_ char **l = NULL; | |
034a2a52 LP |
4550 | |
4551 | assert(path); | |
d60ef526 LP |
4552 | |
4553 | /* Returns all files in a directory in *list, and the number | |
4554 | * of files as return value. If list is NULL returns only the | |
893fa014 | 4555 | * number. */ |
034a2a52 LP |
4556 | |
4557 | d = opendir(path); | |
8ea913b2 LP |
4558 | if (!d) |
4559 | return -errno; | |
4560 | ||
034a2a52 | 4561 | for (;;) { |
7d5e9c0f | 4562 | struct dirent *de; |
034a2a52 | 4563 | |
3fd11280 FW |
4564 | errno = 0; |
4565 | de = readdir(d); | |
4566 | if (!de && errno != 0) | |
4567 | return -errno; | |
034a2a52 LP |
4568 | if (!de) |
4569 | break; | |
4570 | ||
4571 | dirent_ensure_type(d, de); | |
4572 | ||
4573 | if (!dirent_is_file(de)) | |
4574 | continue; | |
4575 | ||
d60ef526 | 4576 | if (list) { |
893fa014 ZJS |
4577 | /* one extra slot is needed for the terminating NULL */ |
4578 | if (!GREEDY_REALLOC(l, bufsize, n + 2)) | |
4579 | return -ENOMEM; | |
034a2a52 | 4580 | |
893fa014 ZJS |
4581 | l[n] = strdup(de->d_name); |
4582 | if (!l[n]) | |
4583 | return -ENOMEM; | |
034a2a52 | 4584 | |
893fa014 | 4585 | l[++n] = NULL; |
d60ef526 | 4586 | } else |
893fa014 | 4587 | n++; |
034a2a52 LP |
4588 | } |
4589 | ||
893fa014 ZJS |
4590 | if (list) { |
4591 | *list = l; | |
4592 | l = NULL; /* avoid freeing */ | |
4593 | } | |
034a2a52 | 4594 | |
893fa014 | 4595 | return n; |
034a2a52 LP |
4596 | } |
4597 | ||
b7def684 | 4598 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4599 | va_list ap; |
4600 | size_t l; | |
4601 | char *r, *p; | |
4602 | ||
4603 | va_start(ap, x); | |
4604 | ||
4605 | if (x) { | |
4606 | l = strlen(x); | |
4607 | ||
4608 | for (;;) { | |
4609 | const char *t; | |
040f18ea | 4610 | size_t n; |
911a4828 LP |
4611 | |
4612 | t = va_arg(ap, const char *); | |
4613 | if (!t) | |
4614 | break; | |
4615 | ||
040f18ea | 4616 | n = strlen(t); |
e98055de LN |
4617 | if (n > ((size_t) -1) - l) { |
4618 | va_end(ap); | |
040f18ea | 4619 | return NULL; |
e98055de | 4620 | } |
040f18ea LP |
4621 | |
4622 | l += n; | |
911a4828 LP |
4623 | } |
4624 | } else | |
4625 | l = 0; | |
4626 | ||
4627 | va_end(ap); | |
4628 | ||
4629 | r = new(char, l+1); | |
4630 | if (!r) | |
4631 | return NULL; | |
4632 | ||
4633 | if (x) { | |
4634 | p = stpcpy(r, x); | |
4635 | ||
4636 | va_start(ap, x); | |
4637 | ||
4638 | for (;;) { | |
4639 | const char *t; | |
4640 | ||
4641 | t = va_arg(ap, const char *); | |
4642 | if (!t) | |
4643 | break; | |
4644 | ||
4645 | p = stpcpy(p, t); | |
4646 | } | |
8ea913b2 LP |
4647 | |
4648 | va_end(ap); | |
911a4828 LP |
4649 | } else |
4650 | r[0] = 0; | |
4651 | ||
4652 | return r; | |
4653 | } | |
4654 | ||
b636465b | 4655 | bool is_main_thread(void) { |
ec202eae | 4656 | static thread_local int cached = 0; |
b636465b LP |
4657 | |
4658 | if (_unlikely_(cached == 0)) | |
4659 | cached = getpid() == gettid() ? 1 : -1; | |
4660 | ||
4661 | return cached > 0; | |
4662 | } | |
4663 | ||
94959f0f LP |
4664 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4665 | char *p, *s; | |
4666 | int r; | |
4667 | unsigned n, m; | |
4668 | ||
4669 | assert(ret); | |
4670 | ||
4671 | /* If it has a queue this is good enough for us */ | |
4672 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4673 | return -ENOMEM; | |
4674 | ||
4675 | r = access(p, F_OK); | |
4676 | free(p); | |
4677 | ||
4678 | if (r >= 0) { | |
4679 | *ret = d; | |
4680 | return 0; | |
4681 | } | |
4682 | ||
4683 | /* If it is a partition find the originating device */ | |
4684 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4685 | return -ENOMEM; | |
4686 | ||
4687 | r = access(p, F_OK); | |
4688 | free(p); | |
4689 | ||
4690 | if (r < 0) | |
4691 | return -ENOENT; | |
4692 | ||
4693 | /* Get parent dev_t */ | |
4694 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4695 | return -ENOMEM; | |
4696 | ||
4697 | r = read_one_line_file(p, &s); | |
4698 | free(p); | |
4699 | ||
4700 | if (r < 0) | |
4701 | return r; | |
4702 | ||
4703 | r = sscanf(s, "%u:%u", &m, &n); | |
4704 | free(s); | |
4705 | ||
4706 | if (r != 2) | |
4707 | return -EINVAL; | |
4708 | ||
4709 | /* Only return this if it is really good enough for us. */ | |
4710 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4711 | return -ENOMEM; | |
4712 | ||
4713 | r = access(p, F_OK); | |
4714 | free(p); | |
4715 | ||
4716 | if (r >= 0) { | |
4717 | *ret = makedev(m, n); | |
4718 | return 0; | |
4719 | } | |
4720 | ||
4721 | return -ENOENT; | |
4722 | } | |
4723 | ||
8d53b453 | 4724 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4725 | struct stat st; |
4726 | ||
4727 | assert(p); | |
4728 | ||
4729 | if (lstat(p, &st) < 0) | |
4730 | return -errno; | |
4731 | ||
4732 | return | |
8d53b453 | 4733 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4734 | (st.st_mode & S_ISVTX); |
4735 | } | |
94959f0f | 4736 | |
f41607a6 LP |
4737 | static const char *const ioprio_class_table[] = { |
4738 | [IOPRIO_CLASS_NONE] = "none", | |
4739 | [IOPRIO_CLASS_RT] = "realtime", | |
4740 | [IOPRIO_CLASS_BE] = "best-effort", | |
4741 | [IOPRIO_CLASS_IDLE] = "idle" | |
4742 | }; | |
4743 | ||
f8b69d1d | 4744 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4745 | |
4746 | static const char *const sigchld_code_table[] = { | |
4747 | [CLD_EXITED] = "exited", | |
4748 | [CLD_KILLED] = "killed", | |
4749 | [CLD_DUMPED] = "dumped", | |
4750 | [CLD_TRAPPED] = "trapped", | |
4751 | [CLD_STOPPED] = "stopped", | |
4752 | [CLD_CONTINUED] = "continued", | |
4753 | }; | |
4754 | ||
4755 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4756 | ||
4757 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4758 | [LOG_FAC(LOG_KERN)] = "kern", | |
4759 | [LOG_FAC(LOG_USER)] = "user", | |
4760 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4761 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4762 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4763 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4764 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4765 | [LOG_FAC(LOG_NEWS)] = "news", | |
4766 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4767 | [LOG_FAC(LOG_CRON)] = "cron", | |
4768 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4769 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4770 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4771 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4772 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4773 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4774 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4775 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4776 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4777 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4778 | }; | |
4779 | ||
f8b69d1d | 4780 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4781 | |
4782 | static const char *const log_level_table[] = { | |
4783 | [LOG_EMERG] = "emerg", | |
4784 | [LOG_ALERT] = "alert", | |
4785 | [LOG_CRIT] = "crit", | |
4786 | [LOG_ERR] = "err", | |
4787 | [LOG_WARNING] = "warning", | |
4788 | [LOG_NOTICE] = "notice", | |
4789 | [LOG_INFO] = "info", | |
4790 | [LOG_DEBUG] = "debug" | |
4791 | }; | |
4792 | ||
f8b69d1d | 4793 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4794 | |
4795 | static const char* const sched_policy_table[] = { | |
4796 | [SCHED_OTHER] = "other", | |
4797 | [SCHED_BATCH] = "batch", | |
4798 | [SCHED_IDLE] = "idle", | |
4799 | [SCHED_FIFO] = "fifo", | |
4800 | [SCHED_RR] = "rr" | |
4801 | }; | |
4802 | ||
f8b69d1d | 4803 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 | 4804 | |
517d56b1 | 4805 | static const char* const rlimit_table[_RLIMIT_MAX] = { |
f41607a6 LP |
4806 | [RLIMIT_CPU] = "LimitCPU", |
4807 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4808 | [RLIMIT_DATA] = "LimitDATA", | |
4809 | [RLIMIT_STACK] = "LimitSTACK", | |
4810 | [RLIMIT_CORE] = "LimitCORE", | |
4811 | [RLIMIT_RSS] = "LimitRSS", | |
4812 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4813 | [RLIMIT_AS] = "LimitAS", | |
4814 | [RLIMIT_NPROC] = "LimitNPROC", | |
4815 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4816 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4817 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4818 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4819 | [RLIMIT_NICE] = "LimitNICE", | |
4820 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4821 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4822 | }; | |
4823 | ||
4824 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4825 | ||
4826 | static const char* const ip_tos_table[] = { | |
4827 | [IPTOS_LOWDELAY] = "low-delay", | |
4828 | [IPTOS_THROUGHPUT] = "throughput", | |
4829 | [IPTOS_RELIABILITY] = "reliability", | |
4830 | [IPTOS_LOWCOST] = "low-cost", | |
4831 | }; | |
4832 | ||
f8b69d1d | 4833 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4834 | |
4e240ab0 | 4835 | static const char *const __signal_table[] = { |
f41607a6 LP |
4836 | [SIGHUP] = "HUP", |
4837 | [SIGINT] = "INT", | |
4838 | [SIGQUIT] = "QUIT", | |
4839 | [SIGILL] = "ILL", | |
4840 | [SIGTRAP] = "TRAP", | |
4841 | [SIGABRT] = "ABRT", | |
4842 | [SIGBUS] = "BUS", | |
4843 | [SIGFPE] = "FPE", | |
4844 | [SIGKILL] = "KILL", | |
4845 | [SIGUSR1] = "USR1", | |
4846 | [SIGSEGV] = "SEGV", | |
4847 | [SIGUSR2] = "USR2", | |
4848 | [SIGPIPE] = "PIPE", | |
4849 | [SIGALRM] = "ALRM", | |
4850 | [SIGTERM] = "TERM", | |
4851 | #ifdef SIGSTKFLT | |
4852 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4853 | #endif | |
4854 | [SIGCHLD] = "CHLD", | |
4855 | [SIGCONT] = "CONT", | |
4856 | [SIGSTOP] = "STOP", | |
4857 | [SIGTSTP] = "TSTP", | |
4858 | [SIGTTIN] = "TTIN", | |
4859 | [SIGTTOU] = "TTOU", | |
4860 | [SIGURG] = "URG", | |
4861 | [SIGXCPU] = "XCPU", | |
4862 | [SIGXFSZ] = "XFSZ", | |
4863 | [SIGVTALRM] = "VTALRM", | |
4864 | [SIGPROF] = "PROF", | |
4865 | [SIGWINCH] = "WINCH", | |
4866 | [SIGIO] = "IO", | |
4867 | [SIGPWR] = "PWR", | |
4868 | [SIGSYS] = "SYS" | |
4869 | }; | |
4870 | ||
4e240ab0 MS |
4871 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4872 | ||
4873 | const char *signal_to_string(int signo) { | |
ec202eae | 4874 | static thread_local char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1]; |
4e240ab0 MS |
4875 | const char *name; |
4876 | ||
4877 | name = __signal_to_string(signo); | |
4878 | if (name) | |
4879 | return name; | |
4880 | ||
4881 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
fa70beaa | 4882 | snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN); |
4e240ab0 | 4883 | else |
fa70beaa LP |
4884 | snprintf(buf, sizeof(buf), "%d", signo); |
4885 | ||
4e240ab0 MS |
4886 | return buf; |
4887 | } | |
4888 | ||
4889 | int signal_from_string(const char *s) { | |
4890 | int signo; | |
4891 | int offset = 0; | |
4892 | unsigned u; | |
4893 | ||
040f18ea | 4894 | signo = __signal_from_string(s); |
4e240ab0 MS |
4895 | if (signo > 0) |
4896 | return signo; | |
4897 | ||
4898 | if (startswith(s, "RTMIN+")) { | |
4899 | s += 6; | |
4900 | offset = SIGRTMIN; | |
4901 | } | |
4902 | if (safe_atou(s, &u) >= 0) { | |
4903 | signo = (int) u + offset; | |
4904 | if (signo > 0 && signo < _NSIG) | |
4905 | return signo; | |
4906 | } | |
4907 | return -1; | |
4908 | } | |
65457142 FC |
4909 | |
4910 | bool kexec_loaded(void) { | |
4911 | bool loaded = false; | |
4912 | char *s; | |
4913 | ||
4914 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
4915 | if (s[0] == '1') | |
4916 | loaded = true; | |
4917 | free(s); | |
4918 | } | |
4919 | return loaded; | |
4920 | } | |
fb9de93d LP |
4921 | |
4922 | int strdup_or_null(const char *a, char **b) { | |
4923 | char *c; | |
4924 | ||
4925 | assert(b); | |
4926 | ||
4927 | if (!a) { | |
4928 | *b = NULL; | |
4929 | return 0; | |
4930 | } | |
4931 | ||
4932 | c = strdup(a); | |
4933 | if (!c) | |
4934 | return -ENOMEM; | |
4935 | ||
4936 | *b = c; | |
4937 | return 0; | |
4938 | } | |
64685e0c | 4939 | |
87d2c1ff LP |
4940 | int prot_from_flags(int flags) { |
4941 | ||
4942 | switch (flags & O_ACCMODE) { | |
4943 | ||
4944 | case O_RDONLY: | |
4945 | return PROT_READ; | |
4946 | ||
4947 | case O_WRONLY: | |
4948 | return PROT_WRITE; | |
4949 | ||
4950 | case O_RDWR: | |
4951 | return PROT_READ|PROT_WRITE; | |
4952 | ||
4953 | default: | |
4954 | return -EINVAL; | |
4955 | } | |
7c99e0c1 | 4956 | } |
689b9a22 | 4957 | |
babfc091 | 4958 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 4959 | unsigned i; |
babfc091 LP |
4960 | |
4961 | static const struct { | |
4962 | const char *suffix; | |
4963 | off_t factor; | |
4964 | } table[] = { | |
32895bb3 LP |
4965 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
4966 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
4967 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
4968 | { "G", 1024ULL*1024ULL*1024ULL }, | |
4969 | { "M", 1024ULL*1024ULL }, | |
4970 | { "K", 1024ULL }, | |
4971 | }; | |
4972 | ||
4973 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
4974 | ||
4975 | if (t >= table[i].factor) { | |
4976 | snprintf(buf, l, | |
4977 | "%llu.%llu%s", | |
4978 | (unsigned long long) (t / table[i].factor), | |
4979 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
4980 | table[i].suffix); | |
4981 | ||
4982 | goto finish; | |
4983 | } | |
4984 | } | |
4985 | ||
4986 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
4987 | ||
4988 | finish: | |
4989 | buf[l-1] = 0; | |
4990 | return buf; | |
4991 | ||
4992 | } | |
55d7bfc1 LP |
4993 | |
4994 | void* memdup(const void *p, size_t l) { | |
4995 | void *r; | |
4996 | ||
4997 | assert(p); | |
4998 | ||
4999 | r = malloc(l); | |
5000 | if (!r) | |
5001 | return NULL; | |
5002 | ||
5003 | memcpy(r, p, l); | |
5004 | return r; | |
5005 | } | |
bb99a35a LP |
5006 | |
5007 | int fd_inc_sndbuf(int fd, size_t n) { | |
5008 | int r, value; | |
5009 | socklen_t l = sizeof(value); | |
5010 | ||
5011 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
92d75ca4 | 5012 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
5013 | return 0; |
5014 | ||
92d75ca4 LP |
5015 | /* If we have the privileges we will ignore the kernel limit. */ |
5016 | ||
bb99a35a | 5017 | value = (int) n; |
92d75ca4 LP |
5018 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) |
5019 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) | |
5020 | return -errno; | |
bb99a35a LP |
5021 | |
5022 | return 1; | |
5023 | } | |
5024 | ||
5025 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5026 | int r, value; | |
5027 | socklen_t l = sizeof(value); | |
5028 | ||
5029 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
92d75ca4 | 5030 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
5031 | return 0; |
5032 | ||
92d75ca4 | 5033 | /* If we have the privileges we will ignore the kernel limit. */ |
bb99a35a | 5034 | |
92d75ca4 LP |
5035 | value = (int) n; |
5036 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) | |
5037 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) | |
5038 | return -errno; | |
bb99a35a LP |
5039 | return 1; |
5040 | } | |
6bb92a16 | 5041 | |
9bdc770c | 5042 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
5043 | pid_t parent_pid, agent_pid; |
5044 | int fd; | |
5045 | bool stdout_is_tty, stderr_is_tty; | |
5046 | unsigned n, i; | |
5047 | va_list ap; | |
5048 | char **l; | |
5049 | ||
5050 | assert(pid); | |
5051 | assert(path); | |
5052 | ||
5053 | parent_pid = getpid(); | |
5054 | ||
5055 | /* Spawns a temporary TTY agent, making sure it goes away when | |
5056 | * we go away */ | |
5057 | ||
5058 | agent_pid = fork(); | |
5059 | if (agent_pid < 0) | |
5060 | return -errno; | |
5061 | ||
5062 | if (agent_pid != 0) { | |
5063 | *pid = agent_pid; | |
5064 | return 0; | |
5065 | } | |
5066 | ||
5067 | /* In the child: | |
5068 | * | |
5069 | * Make sure the agent goes away when the parent dies */ | |
5070 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5071 | _exit(EXIT_FAILURE); | |
5072 | ||
5073 | /* Check whether our parent died before we were able | |
5074 | * to set the death signal */ | |
5075 | if (getppid() != parent_pid) | |
5076 | _exit(EXIT_SUCCESS); | |
5077 | ||
5078 | /* Don't leak fds to the agent */ | |
9bdc770c | 5079 | close_all_fds(except, n_except); |
6bb92a16 LP |
5080 | |
5081 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5082 | stderr_is_tty = isatty(STDERR_FILENO); | |
5083 | ||
5084 | if (!stdout_is_tty || !stderr_is_tty) { | |
5085 | /* Detach from stdout/stderr. and reopen | |
5086 | * /dev/tty for them. This is important to | |
5087 | * ensure that when systemctl is started via | |
5088 | * popen() or a similar call that expects to | |
5089 | * read EOF we actually do generate EOF and | |
5090 | * not delay this indefinitely by because we | |
5091 | * keep an unused copy of stdin around. */ | |
5092 | fd = open("/dev/tty", O_WRONLY); | |
5093 | if (fd < 0) { | |
5094 | log_error("Failed to open /dev/tty: %m"); | |
5095 | _exit(EXIT_FAILURE); | |
5096 | } | |
5097 | ||
5098 | if (!stdout_is_tty) | |
5099 | dup2(fd, STDOUT_FILENO); | |
5100 | ||
5101 | if (!stderr_is_tty) | |
5102 | dup2(fd, STDERR_FILENO); | |
5103 | ||
5104 | if (fd > 2) | |
5105 | close(fd); | |
5106 | } | |
5107 | ||
5108 | /* Count arguments */ | |
5109 | va_start(ap, path); | |
5110 | for (n = 0; va_arg(ap, char*); n++) | |
5111 | ; | |
5112 | va_end(ap); | |
5113 | ||
5114 | /* Allocate strv */ | |
5115 | l = alloca(sizeof(char *) * (n + 1)); | |
5116 | ||
5117 | /* Fill in arguments */ | |
5118 | va_start(ap, path); | |
5119 | for (i = 0; i <= n; i++) | |
5120 | l[i] = va_arg(ap, char*); | |
5121 | va_end(ap); | |
5122 | ||
5123 | execv(path, l); | |
5124 | _exit(EXIT_FAILURE); | |
5125 | } | |
68faf98c LP |
5126 | |
5127 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5128 | struct rlimit highest, fixed; | |
5129 | ||
5130 | assert(rlim); | |
5131 | ||
5132 | if (setrlimit(resource, rlim) >= 0) | |
5133 | return 0; | |
5134 | ||
5135 | if (errno != EPERM) | |
5136 | return -errno; | |
5137 | ||
5138 | /* So we failed to set the desired setrlimit, then let's try | |
5139 | * to get as close as we can */ | |
5140 | assert_se(getrlimit(resource, &highest) == 0); | |
5141 | ||
5142 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5143 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5144 | ||
5145 | if (setrlimit(resource, &fixed) < 0) | |
5146 | return -errno; | |
5147 | ||
5148 | return 0; | |
5149 | } | |
3d9a4122 | 5150 | |
ab94af92 | 5151 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
49aa47c7 LP |
5152 | _cleanup_fclose_ FILE *f = NULL; |
5153 | char *value = NULL; | |
ab94af92 | 5154 | int r; |
ab94af92 LP |
5155 | bool done = false; |
5156 | size_t l; | |
49aa47c7 | 5157 | const char *path; |
ab94af92 | 5158 | |
49aa47c7 | 5159 | assert(pid >= 0); |
ab94af92 LP |
5160 | assert(field); |
5161 | assert(_value); | |
5162 | ||
b68fa010 | 5163 | path = procfs_file_alloca(pid, "environ"); |
ab94af92 LP |
5164 | |
5165 | f = fopen(path, "re"); | |
5166 | if (!f) | |
5167 | return -errno; | |
5168 | ||
5169 | l = strlen(field); | |
5170 | r = 0; | |
5171 | ||
5172 | do { | |
5173 | char line[LINE_MAX]; | |
5174 | unsigned i; | |
5175 | ||
5176 | for (i = 0; i < sizeof(line)-1; i++) { | |
5177 | int c; | |
5178 | ||
5179 | c = getc(f); | |
5180 | if (_unlikely_(c == EOF)) { | |
5181 | done = true; | |
5182 | break; | |
5183 | } else if (c == 0) | |
5184 | break; | |
5185 | ||
5186 | line[i] = c; | |
5187 | } | |
5188 | line[i] = 0; | |
5189 | ||
5190 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5191 | value = strdup(line + l + 1); | |
49aa47c7 LP |
5192 | if (!value) |
5193 | return -ENOMEM; | |
ab94af92 LP |
5194 | |
5195 | r = 1; | |
5196 | break; | |
5197 | } | |
5198 | ||
5199 | } while (!done); | |
5200 | ||
49aa47c7 | 5201 | *_value = value; |
ab94af92 LP |
5202 | return r; |
5203 | } | |
d889a206 | 5204 | |
49dbfa7b LP |
5205 | bool is_valid_documentation_url(const char *url) { |
5206 | assert(url); | |
5207 | ||
5208 | if (startswith(url, "http://") && url[7]) | |
5209 | return true; | |
5210 | ||
5211 | if (startswith(url, "https://") && url[8]) | |
5212 | return true; | |
5213 | ||
5214 | if (startswith(url, "file:") && url[5]) | |
5215 | return true; | |
5216 | ||
5217 | if (startswith(url, "info:") && url[5]) | |
5218 | return true; | |
5219 | ||
5220 | if (startswith(url, "man:") && url[4]) | |
5221 | return true; | |
5222 | ||
5223 | return false; | |
5224 | } | |
9be346c9 HH |
5225 | |
5226 | bool in_initrd(void) { | |
73020ab2 | 5227 | static int saved = -1; |
825c6fe5 | 5228 | struct statfs s; |
8f33b5b8 | 5229 | |
825c6fe5 LP |
5230 | if (saved >= 0) |
5231 | return saved; | |
5232 | ||
5233 | /* We make two checks here: | |
5234 | * | |
5235 | * 1. the flag file /etc/initrd-release must exist | |
5236 | * 2. the root file system must be a memory file system | |
5237 | * | |
5238 | * The second check is extra paranoia, since misdetecting an | |
5239 | * initrd can have bad bad consequences due the initrd | |
5240 | * emptying when transititioning to the main systemd. | |
5241 | */ | |
5242 | ||
5243 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5244 | statfs("/", &s) >= 0 && | |
943aad8c | 5245 | is_temporary_fs(&s); |
9be346c9 | 5246 | |
8f33b5b8 | 5247 | return saved; |
9be346c9 | 5248 | } |
069cfc85 LP |
5249 | |
5250 | void warn_melody(void) { | |
e67f47e5 | 5251 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5252 | |
5253 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5254 | if (fd < 0) | |
5255 | return; | |
5256 | ||
040f18ea | 5257 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5258 | |
5259 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5260 | usleep(125*USEC_PER_MSEC); | |
5261 | ||
5262 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5263 | usleep(125*USEC_PER_MSEC); | |
5264 | ||
5265 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5266 | usleep(125*USEC_PER_MSEC); | |
5267 | ||
5268 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5269 | } |
cd3bd60a LP |
5270 | |
5271 | int make_console_stdio(void) { | |
5272 | int fd, r; | |
5273 | ||
5274 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5275 | ||
3a43da28 | 5276 | fd = acquire_terminal("/dev/console", false, true, true, USEC_INFINITY); |
cd3bd60a LP |
5277 | if (fd < 0) { |
5278 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5279 | return fd; | |
5280 | } | |
5281 | ||
5282 | r = make_stdio(fd); | |
5283 | if (r < 0) { | |
5284 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5285 | return r; | |
5286 | } | |
5287 | ||
5288 | return 0; | |
5289 | } | |
7c5f152a LP |
5290 | |
5291 | int get_home_dir(char **_h) { | |
2cfbd749 | 5292 | struct passwd *p; |
7c5f152a | 5293 | const char *e; |
2cfbd749 | 5294 | char *h; |
7c5f152a | 5295 | uid_t u; |
7c5f152a LP |
5296 | |
5297 | assert(_h); | |
5298 | ||
5299 | /* Take the user specified one */ | |
9a00f57a LP |
5300 | e = secure_getenv("HOME"); |
5301 | if (e && path_is_absolute(e)) { | |
7c5f152a LP |
5302 | h = strdup(e); |
5303 | if (!h) | |
5304 | return -ENOMEM; | |
5305 | ||
5306 | *_h = h; | |
5307 | return 0; | |
5308 | } | |
5309 | ||
5310 | /* Hardcode home directory for root to avoid NSS */ | |
5311 | u = getuid(); | |
5312 | if (u == 0) { | |
5313 | h = strdup("/root"); | |
5314 | if (!h) | |
5315 | return -ENOMEM; | |
5316 | ||
5317 | *_h = h; | |
5318 | return 0; | |
5319 | } | |
5320 | ||
5321 | /* Check the database... */ | |
5322 | errno = 0; | |
5323 | p = getpwuid(u); | |
5324 | if (!p) | |
bcb161b0 | 5325 | return errno > 0 ? -errno : -ESRCH; |
7c5f152a LP |
5326 | |
5327 | if (!path_is_absolute(p->pw_dir)) | |
5328 | return -EINVAL; | |
5329 | ||
5330 | h = strdup(p->pw_dir); | |
5331 | if (!h) | |
5332 | return -ENOMEM; | |
5333 | ||
5334 | *_h = h; | |
5335 | return 0; | |
5336 | } | |
5337 | ||
2cfbd749 LP |
5338 | int get_shell(char **_s) { |
5339 | struct passwd *p; | |
5340 | const char *e; | |
5341 | char *s; | |
5342 | uid_t u; | |
5343 | ||
5344 | assert(_s); | |
5345 | ||
5346 | /* Take the user specified one */ | |
5347 | e = getenv("SHELL"); | |
5348 | if (e) { | |
5349 | s = strdup(e); | |
5350 | if (!s) | |
5351 | return -ENOMEM; | |
5352 | ||
5353 | *_s = s; | |
5354 | return 0; | |
5355 | } | |
5356 | ||
5357 | /* Hardcode home directory for root to avoid NSS */ | |
5358 | u = getuid(); | |
5359 | if (u == 0) { | |
5360 | s = strdup("/bin/sh"); | |
5361 | if (!s) | |
5362 | return -ENOMEM; | |
5363 | ||
5364 | *_s = s; | |
5365 | return 0; | |
5366 | } | |
5367 | ||
5368 | /* Check the database... */ | |
5369 | errno = 0; | |
5370 | p = getpwuid(u); | |
5371 | if (!p) | |
5372 | return errno > 0 ? -errno : -ESRCH; | |
5373 | ||
5374 | if (!path_is_absolute(p->pw_shell)) | |
5375 | return -EINVAL; | |
5376 | ||
5377 | s = strdup(p->pw_shell); | |
5378 | if (!s) | |
5379 | return -ENOMEM; | |
5380 | ||
5381 | *_s = s; | |
5382 | return 0; | |
5383 | } | |
5384 | ||
0b507b17 LP |
5385 | bool filename_is_safe(const char *p) { |
5386 | ||
5387 | if (isempty(p)) | |
5388 | return false; | |
5389 | ||
5390 | if (strchr(p, '/')) | |
5391 | return false; | |
5392 | ||
5393 | if (streq(p, ".")) | |
5394 | return false; | |
5395 | ||
5396 | if (streq(p, "..")) | |
5397 | return false; | |
5398 | ||
5399 | if (strlen(p) > FILENAME_MAX) | |
5400 | return false; | |
5401 | ||
5402 | return true; | |
5403 | } | |
5404 | ||
5405 | bool string_is_safe(const char *p) { | |
5406 | const char *t; | |
5407 | ||
6294aa76 LP |
5408 | if (!p) |
5409 | return false; | |
0b507b17 LP |
5410 | |
5411 | for (t = p; *t; t++) { | |
01539d6e | 5412 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5413 | return false; |
5414 | ||
6294aa76 | 5415 | if (strchr("\\\"\'\0x7f", *t)) |
0b507b17 LP |
5416 | return false; |
5417 | } | |
5418 | ||
5419 | return true; | |
5420 | } | |
cfbc22ab | 5421 | |
ac4c8d6d | 5422 | /** |
6294aa76 LP |
5423 | * Check if a string contains control characters. If 'ok' is non-NULL |
5424 | * it may be a string containing additional CCs to be considered OK. | |
ac4c8d6d | 5425 | */ |
6294aa76 | 5426 | bool string_has_cc(const char *p, const char *ok) { |
4d1a6904 LP |
5427 | const char *t; |
5428 | ||
5429 | assert(p); | |
5430 | ||
3a8a9163 | 5431 | for (t = p; *t; t++) { |
6294aa76 | 5432 | if (ok && strchr(ok, *t)) |
1cb1767a | 5433 | continue; |
6294aa76 LP |
5434 | |
5435 | if (*t > 0 && *t < ' ') | |
4d1a6904 LP |
5436 | return true; |
5437 | ||
3a8a9163 LP |
5438 | if (*t == 127) |
5439 | return true; | |
5440 | } | |
5441 | ||
4d1a6904 LP |
5442 | return false; |
5443 | } | |
5444 | ||
e884315e LP |
5445 | bool path_is_safe(const char *p) { |
5446 | ||
5447 | if (isempty(p)) | |
5448 | return false; | |
5449 | ||
5450 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5451 | return false; | |
5452 | ||
5453 | if (strlen(p) > PATH_MAX) | |
5454 | return false; | |
5455 | ||
5456 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5457 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5458 | return false; | |
5459 | ||
5460 | if (strstr(p, "//")) | |
5461 | return false; | |
5462 | ||
5463 | return true; | |
5464 | } | |
5465 | ||
a9e12476 KS |
5466 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5467 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5468 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5469 | size_t l, u, idx; |
5470 | const void *p; | |
5471 | int comparison; | |
5472 | ||
5473 | l = 0; | |
5474 | u = nmemb; | |
5475 | while (l < u) { | |
5476 | idx = (l + u) / 2; | |
5477 | p = (void *)(((const char *) base) + (idx * size)); | |
5478 | comparison = compar(key, p, arg); | |
5479 | if (comparison < 0) | |
5480 | u = idx; | |
5481 | else if (comparison > 0) | |
5482 | l = idx + 1; | |
5483 | else | |
5484 | return (void *)p; | |
5485 | } | |
5486 | return NULL; | |
5487 | } | |
09017585 MS |
5488 | |
5489 | bool is_locale_utf8(void) { | |
5490 | const char *set; | |
5491 | static int cached_answer = -1; | |
5492 | ||
5493 | if (cached_answer >= 0) | |
5494 | goto out; | |
5495 | ||
5496 | if (!setlocale(LC_ALL, "")) { | |
5497 | cached_answer = true; | |
5498 | goto out; | |
5499 | } | |
5500 | ||
5501 | set = nl_langinfo(CODESET); | |
5502 | if (!set) { | |
5503 | cached_answer = true; | |
5504 | goto out; | |
5505 | } | |
5506 | ||
f168c273 | 5507 | if (streq(set, "UTF-8")) { |
fee79e01 HH |
5508 | cached_answer = true; |
5509 | goto out; | |
5510 | } | |
5511 | ||
6cf2f1d9 HH |
5512 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
5513 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
5514 | set = setlocale(LC_CTYPE, NULL); |
5515 | if (!set) { | |
5516 | cached_answer = true; | |
5517 | goto out; | |
5518 | } | |
5519 | ||
6cf2f1d9 HH |
5520 | /* Check result, but ignore the result if C was set |
5521 | * explicitly. */ | |
5522 | cached_answer = | |
5523 | streq(set, "C") && | |
5524 | !getenv("LC_ALL") && | |
5525 | !getenv("LC_CTYPE") && | |
5526 | !getenv("LANG"); | |
fee79e01 | 5527 | |
09017585 | 5528 | out: |
6cf2f1d9 | 5529 | return (bool) cached_answer; |
09017585 | 5530 | } |
c339d977 MS |
5531 | |
5532 | const char *draw_special_char(DrawSpecialChar ch) { | |
5533 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
6b01f1d3 | 5534 | |
c339d977 | 5535 | /* UTF-8 */ { |
6b01f1d3 | 5536 | [DRAW_TREE_VERTICAL] = "\342\224\202 ", /* │ */ |
45a5ff0d MS |
5537 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ |
5538 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5539 | [DRAW_TREE_SPACE] = " ", /* */ |
6b01f1d3 LP |
5540 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243", /* ‣ */ |
5541 | [DRAW_BLACK_CIRCLE] = "\342\227\217", /* ● */ | |
5542 | [DRAW_ARROW] = "\342\206\222", /* → */ | |
13f8b8cb | 5543 | [DRAW_DASH] = "\342\200\223", /* – */ |
c339d977 | 5544 | }, |
6b01f1d3 | 5545 | |
c339d977 | 5546 | /* ASCII fallback */ { |
6b01f1d3 | 5547 | [DRAW_TREE_VERTICAL] = "| ", |
45a5ff0d MS |
5548 | [DRAW_TREE_BRANCH] = "|-", |
5549 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5550 | [DRAW_TREE_SPACE] = " ", |
6b01f1d3 LP |
5551 | [DRAW_TRIANGULAR_BULLET] = ">", |
5552 | [DRAW_BLACK_CIRCLE] = "*", | |
5553 | [DRAW_ARROW] = "->", | |
13f8b8cb | 5554 | [DRAW_DASH] = "-", |
c339d977 MS |
5555 | } |
5556 | }; | |
5557 | ||
5558 | return draw_table[!is_locale_utf8()][ch]; | |
5559 | } | |
409bc9c3 LP |
5560 | |
5561 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5562 | const char *f; | |
5563 | char *t, *r; | |
5564 | size_t l, old_len, new_len; | |
5565 | ||
5566 | assert(text); | |
5567 | assert(old_string); | |
5568 | assert(new_string); | |
5569 | ||
5570 | old_len = strlen(old_string); | |
5571 | new_len = strlen(new_string); | |
5572 | ||
5573 | l = strlen(text); | |
5574 | r = new(char, l+1); | |
5575 | if (!r) | |
5576 | return NULL; | |
5577 | ||
5578 | f = text; | |
5579 | t = r; | |
5580 | while (*f) { | |
5581 | char *a; | |
5582 | size_t d, nl; | |
5583 | ||
5584 | if (!startswith(f, old_string)) { | |
5585 | *(t++) = *(f++); | |
5586 | continue; | |
5587 | } | |
5588 | ||
5589 | d = t - r; | |
5590 | nl = l - old_len + new_len; | |
5591 | a = realloc(r, nl + 1); | |
5592 | if (!a) | |
5593 | goto oom; | |
5594 | ||
5595 | l = nl; | |
5596 | r = a; | |
5597 | t = r + d; | |
5598 | ||
5599 | t = stpcpy(t, new_string); | |
5600 | f += old_len; | |
5601 | } | |
5602 | ||
5603 | *t = 0; | |
5604 | return r; | |
5605 | ||
5606 | oom: | |
5607 | free(r); | |
5608 | return NULL; | |
5609 | } | |
e8bc0ea2 LP |
5610 | |
5611 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5612 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5613 | enum { |
5614 | STATE_OTHER, | |
5615 | STATE_ESCAPE, | |
5616 | STATE_BRACKET | |
5617 | } state = STATE_OTHER; | |
5618 | char *obuf = NULL; | |
5619 | size_t osz = 0, isz; | |
5620 | FILE *f; | |
5621 | ||
5622 | assert(ibuf); | |
5623 | assert(*ibuf); | |
5624 | ||
5625 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5626 | ||
5627 | isz = _isz ? *_isz : strlen(*ibuf); | |
5628 | ||
5629 | f = open_memstream(&obuf, &osz); | |
5630 | if (!f) | |
5631 | return NULL; | |
5632 | ||
5633 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5634 | ||
5635 | switch (state) { | |
5636 | ||
5637 | case STATE_OTHER: | |
5638 | if (i >= *ibuf + isz) /* EOT */ | |
5639 | break; | |
5640 | else if (*i == '\x1B') | |
5641 | state = STATE_ESCAPE; | |
5642 | else if (*i == '\t') | |
5643 | fputs(" ", f); | |
5644 | else | |
5645 | fputc(*i, f); | |
5646 | break; | |
5647 | ||
5648 | case STATE_ESCAPE: | |
5649 | if (i >= *ibuf + isz) { /* EOT */ | |
5650 | fputc('\x1B', f); | |
5651 | break; | |
5652 | } else if (*i == '[') { | |
5653 | state = STATE_BRACKET; | |
5654 | begin = i + 1; | |
5655 | } else { | |
5656 | fputc('\x1B', f); | |
5657 | fputc(*i, f); | |
5658 | state = STATE_OTHER; | |
5659 | } | |
5660 | ||
5661 | break; | |
5662 | ||
5663 | case STATE_BRACKET: | |
5664 | ||
5665 | if (i >= *ibuf + isz || /* EOT */ | |
5666 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5667 | fputc('\x1B', f); | |
5668 | fputc('[', f); | |
5669 | state = STATE_OTHER; | |
5670 | i = begin-1; | |
5671 | } else if (*i == 'm') | |
5672 | state = STATE_OTHER; | |
5673 | break; | |
5674 | } | |
5675 | } | |
5676 | ||
5677 | if (ferror(f)) { | |
5678 | fclose(f); | |
5679 | free(obuf); | |
5680 | return NULL; | |
5681 | } | |
5682 | ||
5683 | fclose(f); | |
5684 | ||
5685 | free(*ibuf); | |
5686 | *ibuf = obuf; | |
5687 | ||
5688 | if (_isz) | |
5689 | *_isz = osz; | |
5690 | ||
5691 | return obuf; | |
5692 | } | |
240dbaa4 LP |
5693 | |
5694 | int on_ac_power(void) { | |
5695 | bool found_offline = false, found_online = false; | |
5696 | _cleanup_closedir_ DIR *d = NULL; | |
5697 | ||
5698 | d = opendir("/sys/class/power_supply"); | |
5699 | if (!d) | |
5700 | return -errno; | |
5701 | ||
5702 | for (;;) { | |
5703 | struct dirent *de; | |
240dbaa4 LP |
5704 | _cleanup_close_ int fd = -1, device = -1; |
5705 | char contents[6]; | |
5706 | ssize_t n; | |
240dbaa4 | 5707 | |
3fd11280 FW |
5708 | errno = 0; |
5709 | de = readdir(d); | |
5710 | if (!de && errno != 0) | |
5711 | return -errno; | |
240dbaa4 LP |
5712 | |
5713 | if (!de) | |
5714 | break; | |
5715 | ||
5716 | if (ignore_file(de->d_name)) | |
5717 | continue; | |
5718 | ||
5719 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5720 | if (device < 0) { | |
5721 | if (errno == ENOENT || errno == ENOTDIR) | |
5722 | continue; | |
5723 | ||
5724 | return -errno; | |
5725 | } | |
5726 | ||
5727 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5728 | if (fd < 0) { | |
5729 | if (errno == ENOENT) | |
5730 | continue; | |
5731 | ||
5732 | return -errno; | |
5733 | } | |
5734 | ||
5735 | n = read(fd, contents, sizeof(contents)); | |
5736 | if (n < 0) | |
5737 | return -errno; | |
5738 | ||
5739 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5740 | continue; | |
5741 | ||
03e334a1 | 5742 | safe_close(fd); |
240dbaa4 LP |
5743 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
5744 | if (fd < 0) { | |
5745 | if (errno == ENOENT) | |
5746 | continue; | |
5747 | ||
5748 | return -errno; | |
5749 | } | |
5750 | ||
5751 | n = read(fd, contents, sizeof(contents)); | |
5752 | if (n < 0) | |
5753 | return -errno; | |
5754 | ||
5755 | if (n != 2 || contents[1] != '\n') | |
5756 | return -EIO; | |
5757 | ||
5758 | if (contents[0] == '1') { | |
5759 | found_online = true; | |
5760 | break; | |
5761 | } else if (contents[0] == '0') | |
5762 | found_offline = true; | |
5763 | else | |
5764 | return -EIO; | |
5765 | } | |
5766 | ||
5767 | return found_online || !found_offline; | |
5768 | } | |
fabe5c0e | 5769 | |
4cf7ea55 | 5770 | static int search_and_fopen_internal(const char *path, const char *mode, const char *root, char **search, FILE **_f) { |
fabe5c0e LP |
5771 | char **i; |
5772 | ||
5773 | assert(path); | |
5774 | assert(mode); | |
5775 | assert(_f); | |
5776 | ||
7d8da2c9 | 5777 | if (!path_strv_resolve_uniq(search, root)) |
fabe5c0e LP |
5778 | return -ENOMEM; |
5779 | ||
5780 | STRV_FOREACH(i, search) { | |
5781 | _cleanup_free_ char *p = NULL; | |
5782 | FILE *f; | |
5783 | ||
375eadd9 MM |
5784 | if (root) |
5785 | p = strjoin(root, *i, "/", path, NULL); | |
5786 | else | |
5787 | p = strjoin(*i, "/", path, NULL); | |
fabe5c0e LP |
5788 | if (!p) |
5789 | return -ENOMEM; | |
5790 | ||
5791 | f = fopen(p, mode); | |
5792 | if (f) { | |
5793 | *_f = f; | |
5794 | return 0; | |
5795 | } | |
5796 | ||
5797 | if (errno != ENOENT) | |
5798 | return -errno; | |
5799 | } | |
5800 | ||
5801 | return -ENOENT; | |
5802 | } | |
5803 | ||
4cf7ea55 | 5804 | int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f) { |
fabe5c0e LP |
5805 | _cleanup_strv_free_ char **copy = NULL; |
5806 | ||
5807 | assert(path); | |
5808 | assert(mode); | |
5809 | assert(_f); | |
5810 | ||
5811 | if (path_is_absolute(path)) { | |
5812 | FILE *f; | |
5813 | ||
5814 | f = fopen(path, mode); | |
5815 | if (f) { | |
5816 | *_f = f; | |
5817 | return 0; | |
5818 | } | |
5819 | ||
5820 | return -errno; | |
5821 | } | |
5822 | ||
5823 | copy = strv_copy((char**) search); | |
5824 | if (!copy) | |
5825 | return -ENOMEM; | |
5826 | ||
4cf7ea55 | 5827 | return search_and_fopen_internal(path, mode, root, copy, _f); |
fabe5c0e LP |
5828 | } |
5829 | ||
4cf7ea55 | 5830 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f) { |
fabe5c0e LP |
5831 | _cleanup_strv_free_ char **s = NULL; |
5832 | ||
5833 | if (path_is_absolute(path)) { | |
5834 | FILE *f; | |
5835 | ||
5836 | f = fopen(path, mode); | |
5837 | if (f) { | |
5838 | *_f = f; | |
5839 | return 0; | |
5840 | } | |
5841 | ||
5842 | return -errno; | |
5843 | } | |
5844 | ||
5845 | s = strv_split_nulstr(search); | |
5846 | if (!s) | |
5847 | return -ENOMEM; | |
5848 | ||
4cf7ea55 | 5849 | return search_and_fopen_internal(path, mode, root, s, _f); |
fabe5c0e | 5850 | } |
c17ec25e | 5851 | |
66e35261 LP |
5852 | char *strextend(char **x, ...) { |
5853 | va_list ap; | |
5854 | size_t f, l; | |
5855 | char *r, *p; | |
5856 | ||
5857 | assert(x); | |
5858 | ||
5859 | l = f = *x ? strlen(*x) : 0; | |
5860 | ||
5861 | va_start(ap, x); | |
5862 | for (;;) { | |
5863 | const char *t; | |
5864 | size_t n; | |
5865 | ||
5866 | t = va_arg(ap, const char *); | |
5867 | if (!t) | |
5868 | break; | |
5869 | ||
5870 | n = strlen(t); | |
5871 | if (n > ((size_t) -1) - l) { | |
5872 | va_end(ap); | |
5873 | return NULL; | |
5874 | } | |
5875 | ||
5876 | l += n; | |
5877 | } | |
5878 | va_end(ap); | |
5879 | ||
5880 | r = realloc(*x, l+1); | |
5881 | if (!r) | |
5882 | return NULL; | |
5883 | ||
5884 | p = r + f; | |
5885 | ||
5886 | va_start(ap, x); | |
5887 | for (;;) { | |
5888 | const char *t; | |
5889 | ||
5890 | t = va_arg(ap, const char *); | |
5891 | if (!t) | |
5892 | break; | |
5893 | ||
5894 | p = stpcpy(p, t); | |
5895 | } | |
5896 | va_end(ap); | |
5897 | ||
5898 | *p = 0; | |
5899 | *x = r; | |
5900 | ||
5901 | return r + l; | |
5902 | } | |
9a17484d LP |
5903 | |
5904 | char *strrep(const char *s, unsigned n) { | |
5905 | size_t l; | |
5906 | char *r, *p; | |
5907 | unsigned i; | |
5908 | ||
5909 | assert(s); | |
5910 | ||
5911 | l = strlen(s); | |
5912 | p = r = malloc(l * n + 1); | |
5913 | if (!r) | |
5914 | return NULL; | |
5915 | ||
5916 | for (i = 0; i < n; i++) | |
5917 | p = stpcpy(p, s); | |
5918 | ||
5919 | *p = 0; | |
5920 | return r; | |
5921 | } | |
392d5b37 | 5922 | |
ca2d3784 ZJS |
5923 | void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) { |
5924 | size_t a, newalloc; | |
392d5b37 LP |
5925 | void *q; |
5926 | ||
98088803 | 5927 | assert(p); |
e93c33d4 SL |
5928 | assert(allocated); |
5929 | ||
392d5b37 LP |
5930 | if (*allocated >= need) |
5931 | return *p; | |
5932 | ||
ca2d3784 ZJS |
5933 | newalloc = MAX(need * 2, 64u / size); |
5934 | a = newalloc * size; | |
98088803 LP |
5935 | |
5936 | /* check for overflows */ | |
ca2d3784 | 5937 | if (a < size * need) |
98088803 LP |
5938 | return NULL; |
5939 | ||
392d5b37 LP |
5940 | q = realloc(*p, a); |
5941 | if (!q) | |
5942 | return NULL; | |
5943 | ||
5944 | *p = q; | |
ca2d3784 | 5945 | *allocated = newalloc; |
392d5b37 LP |
5946 | return q; |
5947 | } | |
aa96c6cb | 5948 | |
ca2d3784 | 5949 | void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) { |
98088803 | 5950 | size_t prev; |
4545a231 DH |
5951 | uint8_t *q; |
5952 | ||
98088803 LP |
5953 | assert(p); |
5954 | assert(allocated); | |
5955 | ||
5956 | prev = *allocated; | |
5957 | ||
ca2d3784 | 5958 | q = greedy_realloc(p, allocated, need, size); |
4545a231 DH |
5959 | if (!q) |
5960 | return NULL; | |
5961 | ||
5962 | if (*allocated > prev) | |
ca2d3784 | 5963 | memzero(q + prev * size, (*allocated - prev) * size); |
4545a231 DH |
5964 | |
5965 | return q; | |
5966 | } | |
5967 | ||
aa96c6cb LP |
5968 | bool id128_is_valid(const char *s) { |
5969 | size_t i, l; | |
5970 | ||
5971 | l = strlen(s); | |
5972 | if (l == 32) { | |
5973 | ||
5974 | /* Simple formatted 128bit hex string */ | |
5975 | ||
5976 | for (i = 0; i < l; i++) { | |
5977 | char c = s[i]; | |
5978 | ||
5979 | if (!(c >= '0' && c <= '9') && | |
5980 | !(c >= 'a' && c <= 'z') && | |
5981 | !(c >= 'A' && c <= 'Z')) | |
5982 | return false; | |
5983 | } | |
5984 | ||
5985 | } else if (l == 36) { | |
5986 | ||
5987 | /* Formatted UUID */ | |
5988 | ||
5989 | for (i = 0; i < l; i++) { | |
5990 | char c = s[i]; | |
5991 | ||
5992 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
5993 | if (c != '-') | |
5994 | return false; | |
5995 | } else { | |
5996 | if (!(c >= '0' && c <= '9') && | |
5997 | !(c >= 'a' && c <= 'z') && | |
5998 | !(c >= 'A' && c <= 'Z')) | |
5999 | return false; | |
6000 | } | |
6001 | } | |
6002 | ||
6003 | } else | |
6004 | return false; | |
6005 | ||
6006 | return true; | |
6007 | } | |
7085053a | 6008 | |
d4ac85c6 LP |
6009 | int split_pair(const char *s, const char *sep, char **l, char **r) { |
6010 | char *x, *a, *b; | |
6011 | ||
6012 | assert(s); | |
6013 | assert(sep); | |
6014 | assert(l); | |
6015 | assert(r); | |
6016 | ||
6017 | if (isempty(sep)) | |
6018 | return -EINVAL; | |
6019 | ||
6020 | x = strstr(s, sep); | |
6021 | if (!x) | |
6022 | return -EINVAL; | |
6023 | ||
6024 | a = strndup(s, x - s); | |
6025 | if (!a) | |
6026 | return -ENOMEM; | |
6027 | ||
6028 | b = strdup(x + strlen(sep)); | |
6029 | if (!b) { | |
6030 | free(a); | |
6031 | return -ENOMEM; | |
6032 | } | |
6033 | ||
6034 | *l = a; | |
6035 | *r = b; | |
6036 | ||
6037 | return 0; | |
6038 | } | |
295edddf | 6039 | |
74df0fca | 6040 | int shall_restore_state(void) { |
059cb385 | 6041 | _cleanup_free_ char *line = NULL; |
295edddf | 6042 | char *w, *state; |
295edddf | 6043 | size_t l; |
74df0fca | 6044 | int r; |
295edddf | 6045 | |
74df0fca LP |
6046 | r = proc_cmdline(&line); |
6047 | if (r < 0) | |
6048 | return r; | |
6049 | if (r == 0) /* Container ... */ | |
6050 | return 1; | |
295edddf | 6051 | |
059cb385 | 6052 | r = 1; |
74df0fca | 6053 | |
059cb385 LP |
6054 | FOREACH_WORD_QUOTED(w, l, line, state) { |
6055 | const char *e; | |
6056 | char n[l+1]; | |
6057 | int k; | |
6058 | ||
6059 | memcpy(n, w, l); | |
6060 | n[l] = 0; | |
6061 | ||
6062 | e = startswith(n, "systemd.restore_state="); | |
6063 | if (!e) | |
6064 | continue; | |
6065 | ||
6066 | k = parse_boolean(e); | |
6067 | if (k >= 0) | |
6068 | r = k; | |
6069 | } | |
6070 | ||
6071 | return r; | |
74df0fca LP |
6072 | } |
6073 | ||
6074 | int proc_cmdline(char **ret) { | |
6075 | int r; | |
6076 | ||
6077 | if (detect_container(NULL) > 0) { | |
39883f62 | 6078 | char *buf = NULL, *p; |
02bb6cda LP |
6079 | size_t sz = 0; |
6080 | ||
6081 | r = read_full_file("/proc/1/cmdline", &buf, &sz); | |
6082 | if (r < 0) | |
6083 | return r; | |
6084 | ||
6085 | for (p = buf; p + 1 < buf + sz; p++) | |
6086 | if (*p == 0) | |
6087 | *p = ' '; | |
6088 | ||
059cb385 | 6089 | *p = 0; |
02bb6cda LP |
6090 | *ret = buf; |
6091 | return 1; | |
295edddf TG |
6092 | } |
6093 | ||
74df0fca LP |
6094 | r = read_one_line_file("/proc/cmdline", ret); |
6095 | if (r < 0) | |
6096 | return r; | |
295edddf | 6097 | |
74df0fca | 6098 | return 1; |
295edddf | 6099 | } |
bc9fd78c | 6100 | |
059cb385 | 6101 | int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) { |
141a79f4 ZJS |
6102 | _cleanup_free_ char *line = NULL; |
6103 | char *w, *state; | |
6104 | size_t l; | |
6105 | int r; | |
6106 | ||
059cb385 LP |
6107 | assert(parse_item); |
6108 | ||
141a79f4 ZJS |
6109 | r = proc_cmdline(&line); |
6110 | if (r < 0) | |
6111 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); | |
6112 | if (r <= 0) | |
6113 | return 0; | |
6114 | ||
6115 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
059cb385 | 6116 | char word[l+1], *value; |
141a79f4 | 6117 | |
059cb385 LP |
6118 | memcpy(word, w, l); |
6119 | word[l] = 0; | |
141a79f4 | 6120 | |
059cb385 LP |
6121 | /* Filter out arguments that are intended only for the |
6122 | * initrd */ | |
6123 | if (!in_initrd() && startswith(word, "rd.")) | |
6124 | continue; | |
6125 | ||
6126 | value = strchr(word, '='); | |
6127 | if (value) | |
6128 | *(value++) = 0; | |
6129 | ||
6130 | r = parse_item(word, value); | |
6131 | if (r < 0) | |
141a79f4 | 6132 | return r; |
141a79f4 ZJS |
6133 | } |
6134 | ||
6135 | return 0; | |
6136 | } | |
6137 | ||
bc9fd78c LP |
6138 | int container_get_leader(const char *machine, pid_t *pid) { |
6139 | _cleanup_free_ char *s = NULL, *class = NULL; | |
6140 | const char *p; | |
6141 | pid_t leader; | |
6142 | int r; | |
6143 | ||
6144 | assert(machine); | |
6145 | assert(pid); | |
6146 | ||
6147 | p = strappenda("/run/systemd/machines/", machine); | |
6148 | r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); | |
6149 | if (r == -ENOENT) | |
6150 | return -EHOSTDOWN; | |
6151 | if (r < 0) | |
6152 | return r; | |
6153 | if (!s) | |
6154 | return -EIO; | |
6155 | ||
6156 | if (!streq_ptr(class, "container")) | |
6157 | return -EIO; | |
6158 | ||
6159 | r = parse_pid(s, &leader); | |
6160 | if (r < 0) | |
6161 | return r; | |
6162 | if (leader <= 1) | |
6163 | return -EIO; | |
6164 | ||
6165 | *pid = leader; | |
6166 | return 0; | |
6167 | } | |
6168 | ||
878cd7e9 LP |
6169 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd) { |
6170 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1; | |
359a06aa | 6171 | int rfd = -1; |
bc9fd78c LP |
6172 | |
6173 | assert(pid >= 0); | |
bc9fd78c | 6174 | |
878cd7e9 LP |
6175 | if (mntns_fd) { |
6176 | const char *mntns; | |
a4475f57 | 6177 | |
878cd7e9 LP |
6178 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
6179 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6180 | if (mntnsfd < 0) | |
6181 | return -errno; | |
6182 | } | |
bc9fd78c | 6183 | |
878cd7e9 LP |
6184 | if (pidns_fd) { |
6185 | const char *pidns; | |
6186 | ||
6187 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
6188 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6189 | if (pidnsfd < 0) | |
6190 | return -errno; | |
6191 | } | |
6192 | ||
6193 | if (netns_fd) { | |
6194 | const char *netns; | |
6195 | ||
6196 | netns = procfs_file_alloca(pid, "ns/net"); | |
6197 | netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6198 | if (netnsfd < 0) | |
6199 | return -errno; | |
6200 | } | |
6201 | ||
6202 | if (root_fd) { | |
6203 | const char *root; | |
6204 | ||
6205 | root = procfs_file_alloca(pid, "root"); | |
6206 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
6207 | if (rfd < 0) | |
6208 | return -errno; | |
6209 | } | |
6210 | ||
6211 | if (pidns_fd) | |
6212 | *pidns_fd = pidnsfd; | |
bc9fd78c | 6213 | |
878cd7e9 LP |
6214 | if (mntns_fd) |
6215 | *mntns_fd = mntnsfd; | |
6216 | ||
6217 | if (netns_fd) | |
6218 | *netns_fd = netnsfd; | |
6219 | ||
6220 | if (root_fd) | |
6221 | *root_fd = rfd; | |
6222 | ||
6223 | pidnsfd = mntnsfd = netnsfd = -1; | |
bc9fd78c LP |
6224 | |
6225 | return 0; | |
6226 | } | |
6227 | ||
878cd7e9 | 6228 | int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd) { |
bc9fd78c | 6229 | |
878cd7e9 LP |
6230 | if (pidns_fd >= 0) |
6231 | if (setns(pidns_fd, CLONE_NEWPID) < 0) | |
6232 | return -errno; | |
a4475f57 | 6233 | |
878cd7e9 LP |
6234 | if (mntns_fd >= 0) |
6235 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
6236 | return -errno; | |
bc9fd78c | 6237 | |
878cd7e9 LP |
6238 | if (netns_fd >= 0) |
6239 | if (setns(netns_fd, CLONE_NEWNET) < 0) | |
6240 | return -errno; | |
bc9fd78c | 6241 | |
878cd7e9 LP |
6242 | if (root_fd >= 0) { |
6243 | if (fchdir(root_fd) < 0) | |
6244 | return -errno; | |
6245 | ||
6246 | if (chroot(".") < 0) | |
6247 | return -errno; | |
6248 | } | |
bc9fd78c | 6249 | |
5e2b3214 LP |
6250 | if (setresgid(0, 0, 0) < 0) |
6251 | return -errno; | |
6252 | ||
878cd7e9 LP |
6253 | if (setgroups(0, NULL) < 0) |
6254 | return -errno; | |
6255 | ||
5e2b3214 LP |
6256 | if (setresuid(0, 0, 0) < 0) |
6257 | return -errno; | |
6258 | ||
bc9fd78c LP |
6259 | return 0; |
6260 | } | |
bf108e55 | 6261 | |
9f5650ae LP |
6262 | bool pid_is_unwaited(pid_t pid) { |
6263 | /* Checks whether a PID is still valid at all, including a zombie */ | |
6264 | ||
bf108e55 LP |
6265 | if (pid <= 0) |
6266 | return false; | |
6267 | ||
6268 | if (kill(pid, 0) >= 0) | |
6269 | return true; | |
6270 | ||
6271 | return errno != ESRCH; | |
6272 | } | |
eff05270 | 6273 | |
9f5650ae LP |
6274 | bool pid_is_alive(pid_t pid) { |
6275 | int r; | |
6276 | ||
6277 | /* Checks whether a PID is still valid and not a zombie */ | |
6278 | ||
6279 | if (pid <= 0) | |
6280 | return false; | |
6281 | ||
6282 | r = get_process_state(pid); | |
6283 | if (r == -ENOENT || r == 'Z') | |
6284 | return false; | |
6285 | ||
6286 | return true; | |
6287 | } | |
6288 | ||
eff05270 LP |
6289 | int getpeercred(int fd, struct ucred *ucred) { |
6290 | socklen_t n = sizeof(struct ucred); | |
6291 | struct ucred u; | |
6292 | int r; | |
6293 | ||
6294 | assert(fd >= 0); | |
6295 | assert(ucred); | |
6296 | ||
6297 | r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &u, &n); | |
6298 | if (r < 0) | |
6299 | return -errno; | |
6300 | ||
6301 | if (n != sizeof(struct ucred)) | |
6302 | return -EIO; | |
6303 | ||
6304 | /* Check if the data is actually useful and not suppressed due | |
6305 | * to namespacing issues */ | |
6306 | if (u.pid <= 0) | |
6307 | return -ENODATA; | |
6308 | ||
6309 | *ucred = u; | |
6310 | return 0; | |
6311 | } | |
6312 | ||
6313 | int getpeersec(int fd, char **ret) { | |
6314 | socklen_t n = 64; | |
6315 | char *s; | |
6316 | int r; | |
6317 | ||
6318 | assert(fd >= 0); | |
6319 | assert(ret); | |
6320 | ||
6321 | s = new0(char, n); | |
6322 | if (!s) | |
6323 | return -ENOMEM; | |
6324 | ||
6325 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6326 | if (r < 0) { | |
6327 | free(s); | |
6328 | ||
6329 | if (errno != ERANGE) | |
6330 | return -errno; | |
6331 | ||
6332 | s = new0(char, n); | |
6333 | if (!s) | |
6334 | return -ENOMEM; | |
6335 | ||
6336 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6337 | if (r < 0) { | |
6338 | free(s); | |
6339 | return -errno; | |
6340 | } | |
6341 | } | |
6342 | ||
ae98841e LP |
6343 | if (isempty(s)) { |
6344 | free(s); | |
6345 | return -ENOTSUP; | |
6346 | } | |
6347 | ||
eff05270 LP |
6348 | *ret = s; |
6349 | return 0; | |
6350 | } | |
8e33886e | 6351 | |
0f010ef2 | 6352 | /* This is much like like mkostemp() but is subject to umask(). */ |
65b3903f | 6353 | int mkostemp_safe(char *pattern, int flags) { |
2d5bdf5b | 6354 | _cleanup_umask_ mode_t u; |
0f010ef2 | 6355 | int fd; |
65b3903f | 6356 | |
d37a91e8 | 6357 | assert(pattern); |
65b3903f | 6358 | |
2d5bdf5b LP |
6359 | u = umask(077); |
6360 | ||
0f010ef2 ZJS |
6361 | fd = mkostemp(pattern, flags); |
6362 | if (fd < 0) | |
6363 | return -errno; | |
65b3903f | 6364 | |
0f010ef2 | 6365 | return fd; |
65b3903f ZJS |
6366 | } |
6367 | ||
8e33886e | 6368 | int open_tmpfile(const char *path, int flags) { |
8e33886e | 6369 | char *p; |
a6afc4ae LP |
6370 | int fd; |
6371 | ||
6372 | assert(path); | |
8e33886e ZJS |
6373 | |
6374 | #ifdef O_TMPFILE | |
7736202c LP |
6375 | /* Try O_TMPFILE first, if it is supported */ |
6376 | fd = open(path, flags|O_TMPFILE, S_IRUSR|S_IWUSR); | |
8e33886e ZJS |
6377 | if (fd >= 0) |
6378 | return fd; | |
6379 | #endif | |
7736202c LP |
6380 | |
6381 | /* Fall back to unguessable name + unlinking */ | |
8e33886e ZJS |
6382 | p = strappenda(path, "/systemd-tmp-XXXXXX"); |
6383 | ||
a6afc4ae | 6384 | fd = mkostemp_safe(p, flags); |
8e33886e | 6385 | if (fd < 0) |
65b3903f | 6386 | return fd; |
8e33886e ZJS |
6387 | |
6388 | unlink(p); | |
6389 | return fd; | |
6390 | } | |
fdb9161c LP |
6391 | |
6392 | int fd_warn_permissions(const char *path, int fd) { | |
6393 | struct stat st; | |
6394 | ||
6395 | if (fstat(fd, &st) < 0) | |
6396 | return -errno; | |
6397 | ||
6398 | if (st.st_mode & 0111) | |
6399 | log_warning("Configuration file %s is marked executable. Please remove executable permission bits. Proceeding anyway.", path); | |
6400 | ||
6401 | if (st.st_mode & 0002) | |
6402 | log_warning("Configuration file %s is marked world-writable. Please remove world writability permission bits. Proceeding anyway.", path); | |
6403 | ||
6404 | if (getpid() == 1 && (st.st_mode & 0044) != 0044) | |
6405 | 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); | |
6406 | ||
6407 | return 0; | |
6408 | } | |
6afc95b7 | 6409 | |
ac45f971 | 6410 | unsigned long personality_from_string(const char *p) { |
6afc95b7 LP |
6411 | |
6412 | /* Parse a personality specifier. We introduce our own | |
6413 | * identifiers that indicate specific ABIs, rather than just | |
6414 | * hints regarding the register size, since we want to keep | |
6415 | * things open for multiple locally supported ABIs for the | |
6416 | * same register size. We try to reuse the ABI identifiers | |
6417 | * used by libseccomp. */ | |
6418 | ||
6419 | #if defined(__x86_64__) | |
6420 | ||
6421 | if (streq(p, "x86")) | |
6422 | return PER_LINUX32; | |
6423 | ||
6424 | if (streq(p, "x86-64")) | |
6425 | return PER_LINUX; | |
6426 | ||
6427 | #elif defined(__i386__) | |
6428 | ||
6429 | if (streq(p, "x86")) | |
6430 | return PER_LINUX; | |
6431 | #endif | |
6432 | ||
6433 | /* personality(7) documents that 0xffffffffUL is used for | |
6434 | * querying the current personality, hence let's use that here | |
6435 | * as error indicator. */ | |
6436 | return 0xffffffffUL; | |
6437 | } | |
ac45f971 LP |
6438 | |
6439 | const char* personality_to_string(unsigned long p) { | |
6440 | ||
6441 | #if defined(__x86_64__) | |
6442 | ||
6443 | if (p == PER_LINUX32) | |
6444 | return "x86"; | |
6445 | ||
6446 | if (p == PER_LINUX) | |
6447 | return "x86-64"; | |
6448 | ||
6449 | #elif defined(__i386__) | |
6450 | ||
6451 | if (p == PER_LINUX) | |
6452 | return "x86"; | |
6453 | #endif | |
6454 | ||
6455 | return NULL; | |
6456 | } | |
1c231f56 LP |
6457 | |
6458 | uint64_t physical_memory(void) { | |
6459 | long mem; | |
6460 | ||
6461 | /* We return this as uint64_t in case we are running as 32bit | |
6462 | * process on a 64bit kernel with huge amounts of memory */ | |
6463 | ||
6464 | mem = sysconf(_SC_PHYS_PAGES); | |
6465 | assert(mem > 0); | |
6466 | ||
6467 | return (uint64_t) mem * (uint64_t) page_size(); | |
6468 | } | |
6db615c1 LP |
6469 | |
6470 | char* mount_test_option(const char *haystack, const char *needle) { | |
6471 | ||
6472 | struct mntent me = { | |
6473 | .mnt_opts = (char*) haystack | |
6474 | }; | |
6475 | ||
6476 | assert(needle); | |
6477 | ||
6478 | /* Like glibc's hasmntopt(), but works on a string, not a | |
6479 | * struct mntent */ | |
6480 | ||
6481 | if (!haystack) | |
6482 | return NULL; | |
6483 | ||
6484 | return hasmntopt(&me, needle); | |
6485 | } | |
29bfbcd6 LP |
6486 | |
6487 | void hexdump(FILE *f, const void *p, size_t s) { | |
6488 | const uint8_t *b = p; | |
6489 | unsigned n = 0; | |
6490 | ||
6491 | assert(s == 0 || b); | |
6492 | ||
6493 | while (s > 0) { | |
6494 | size_t i; | |
6495 | ||
6496 | fprintf(f, "%04x ", n); | |
6497 | ||
6498 | for (i = 0; i < 16; i++) { | |
6499 | ||
6500 | if (i >= s) | |
6501 | fputs(" ", f); | |
6502 | else | |
6503 | fprintf(f, "%02x ", b[i]); | |
6504 | ||
6505 | if (i == 7) | |
6506 | fputc(' ', f); | |
6507 | } | |
6508 | ||
6509 | fputc(' ', f); | |
6510 | ||
6511 | for (i = 0; i < 16; i++) { | |
6512 | ||
6513 | if (i >= s) | |
6514 | fputc(' ', f); | |
6515 | else | |
6516 | fputc(isprint(b[i]) ? (char) b[i] : '.', f); | |
6517 | } | |
6518 | ||
6519 | fputc('\n', f); | |
6520 | ||
6521 | if (s < 16) | |
6522 | break; | |
6523 | ||
6524 | n += 16; | |
6525 | b += 16; | |
6526 | s -= 16; | |
6527 | } | |
6528 | } | |
c5220a94 | 6529 | |
966bff26 | 6530 | int update_reboot_param_file(const char *param) { |
c5220a94 MO |
6531 | int r = 0; |
6532 | ||
6533 | if (param) { | |
6534 | ||
6535 | r = write_string_file(REBOOT_PARAM_FILE, param); | |
6536 | if (r < 0) | |
6537 | log_error("Failed to write reboot param to " | |
6538 | REBOOT_PARAM_FILE": %s", strerror(-r)); | |
6539 | } else | |
6540 | unlink(REBOOT_PARAM_FILE); | |
6541 | ||
6542 | return r; | |
6543 | } | |
6d313367 LP |
6544 | |
6545 | int umount_recursive(const char *prefix, int flags) { | |
6546 | bool again; | |
6547 | int n = 0, r; | |
6548 | ||
6549 | /* Try to umount everything recursively below a | |
6550 | * directory. Also, take care of stacked mounts, and keep | |
6551 | * unmounting them until they are gone. */ | |
6552 | ||
6553 | do { | |
6554 | _cleanup_fclose_ FILE *proc_self_mountinfo = NULL; | |
6555 | ||
6556 | again = false; | |
6557 | r = 0; | |
6558 | ||
6559 | proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"); | |
6560 | if (!proc_self_mountinfo) | |
6561 | return -errno; | |
6562 | ||
6563 | for (;;) { | |
6564 | _cleanup_free_ char *path = NULL, *p = NULL; | |
6565 | int k; | |
6566 | ||
6567 | k = fscanf(proc_self_mountinfo, | |
6568 | "%*s " /* (1) mount id */ | |
6569 | "%*s " /* (2) parent id */ | |
6570 | "%*s " /* (3) major:minor */ | |
6571 | "%*s " /* (4) root */ | |
6572 | "%ms " /* (5) mount point */ | |
6573 | "%*s" /* (6) mount options */ | |
6574 | "%*[^-]" /* (7) optional fields */ | |
6575 | "- " /* (8) separator */ | |
6576 | "%*s " /* (9) file system type */ | |
6577 | "%*s" /* (10) mount source */ | |
6578 | "%*s" /* (11) mount options 2 */ | |
6579 | "%*[^\n]", /* some rubbish at the end */ | |
6580 | &path); | |
6d313367 LP |
6581 | if (k != 1) { |
6582 | if (k == EOF) | |
6583 | break; | |
6584 | ||
6585 | continue; | |
6586 | } | |
6587 | ||
6588 | p = cunescape(path); | |
6589 | if (!p) | |
6590 | return -ENOMEM; | |
6591 | ||
6592 | if (!path_startswith(p, prefix)) | |
6593 | continue; | |
6594 | ||
6595 | if (umount2(p, flags) < 0) { | |
6596 | r = -errno; | |
6597 | continue; | |
6598 | } | |
6599 | ||
6600 | again = true; | |
6601 | n++; | |
6602 | ||
6603 | break; | |
6604 | } | |
6605 | ||
6606 | } while (again); | |
6607 | ||
6608 | return r ? r : n; | |
6609 | } | |
d6797c92 LP |
6610 | |
6611 | int bind_remount_recursive(const char *prefix, bool ro) { | |
6612 | _cleanup_set_free_free_ Set *done = NULL; | |
6613 | _cleanup_free_ char *cleaned = NULL; | |
6614 | int r; | |
6615 | ||
6616 | /* Recursively remount a directory (and all its submounts) | |
6617 | * read-only or read-write. If the directory is already | |
6618 | * mounted, we reuse the mount and simply mark it | |
6619 | * MS_BIND|MS_RDONLY (or remove the MS_RDONLY for read-write | |
6620 | * operation). If it isn't we first make it one. Afterwards we | |
6621 | * apply MS_BIND|MS_RDONLY (or remove MS_RDONLY) to all | |
6622 | * submounts we can access, too. When mounts are stacked on | |
6623 | * the same mount point we only care for each individual | |
6624 | * "top-level" mount on each point, as we cannot | |
6625 | * influence/access the underlying mounts anyway. We do not | |
6626 | * have any effect on future submounts that might get | |
6627 | * propagated, they migt be writable. This includes future | |
6628 | * submounts that have been triggered via autofs. */ | |
6629 | ||
6630 | cleaned = strdup(prefix); | |
6631 | if (!cleaned) | |
6632 | return -ENOMEM; | |
6633 | ||
6634 | path_kill_slashes(cleaned); | |
6635 | ||
6636 | done = set_new(string_hash_func, string_compare_func); | |
6637 | if (!done) | |
6638 | return -ENOMEM; | |
6639 | ||
6640 | for (;;) { | |
6641 | _cleanup_fclose_ FILE *proc_self_mountinfo = NULL; | |
6642 | _cleanup_set_free_free_ Set *todo = NULL; | |
6643 | bool top_autofs = false; | |
6644 | char *x; | |
6645 | ||
6646 | todo = set_new(string_hash_func, string_compare_func); | |
6647 | if (!todo) | |
6648 | return -ENOMEM; | |
6649 | ||
6650 | proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"); | |
6651 | if (!proc_self_mountinfo) | |
6652 | return -errno; | |
6653 | ||
6654 | for (;;) { | |
6655 | _cleanup_free_ char *path = NULL, *p = NULL, *type = NULL; | |
6656 | int k; | |
6657 | ||
6658 | k = fscanf(proc_self_mountinfo, | |
6659 | "%*s " /* (1) mount id */ | |
6660 | "%*s " /* (2) parent id */ | |
6661 | "%*s " /* (3) major:minor */ | |
6662 | "%*s " /* (4) root */ | |
6663 | "%ms " /* (5) mount point */ | |
6664 | "%*s" /* (6) mount options (superblock) */ | |
6665 | "%*[^-]" /* (7) optional fields */ | |
6666 | "- " /* (8) separator */ | |
6667 | "%ms " /* (9) file system type */ | |
6668 | "%*s" /* (10) mount source */ | |
6669 | "%*s" /* (11) mount options (bind mount) */ | |
6670 | "%*[^\n]", /* some rubbish at the end */ | |
6671 | &path, | |
6672 | &type); | |
6673 | if (k != 2) { | |
6674 | if (k == EOF) | |
6675 | break; | |
6676 | ||
6677 | continue; | |
6678 | } | |
6679 | ||
6680 | p = cunescape(path); | |
6681 | if (!p) | |
6682 | return -ENOMEM; | |
6683 | ||
6684 | /* Let's ignore autofs mounts. If they aren't | |
6685 | * triggered yet, we want to avoid triggering | |
6686 | * them, as we don't make any guarantees for | |
6687 | * future submounts anyway. If they are | |
6688 | * already triggered, then we will find | |
6689 | * another entry for this. */ | |
6690 | if (streq(type, "autofs")) { | |
6691 | top_autofs = top_autofs || path_equal(cleaned, p); | |
6692 | continue; | |
6693 | } | |
6694 | ||
6695 | if (path_startswith(p, cleaned) && | |
6696 | !set_contains(done, p)) { | |
6697 | ||
6698 | r = set_consume(todo, p); | |
6699 | p = NULL; | |
6700 | ||
6701 | if (r == -EEXIST) | |
6702 | continue; | |
6703 | if (r < 0) | |
6704 | return r; | |
6705 | } | |
6706 | } | |
6707 | ||
6708 | /* If we have no submounts to process anymore and if | |
6709 | * the root is either already done, or an autofs, we | |
6710 | * are done */ | |
6711 | if (set_isempty(todo) && | |
6712 | (top_autofs || set_contains(done, cleaned))) | |
6713 | return 0; | |
6714 | ||
6715 | if (!set_contains(done, cleaned) && | |
6716 | !set_contains(todo, cleaned)) { | |
6717 | /* The prefix directory itself is not yet a | |
6718 | * mount, make it one. */ | |
6719 | if (mount(cleaned, cleaned, NULL, MS_BIND|MS_REC, NULL) < 0) | |
6720 | return -errno; | |
6721 | ||
6722 | if (mount(NULL, prefix, NULL, MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) | |
6723 | return -errno; | |
6724 | ||
6725 | x = strdup(cleaned); | |
6726 | if (!x) | |
6727 | return -ENOMEM; | |
6728 | ||
6729 | r = set_consume(done, x); | |
6730 | if (r < 0) | |
6731 | return r; | |
6732 | } | |
6733 | ||
6734 | while ((x = set_steal_first(todo))) { | |
6735 | ||
6736 | r = set_consume(done, x); | |
6737 | if (r == -EEXIST) | |
6738 | continue; | |
6739 | if (r < 0) | |
6740 | return r; | |
6741 | ||
6742 | if (mount(NULL, x, NULL, MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) { | |
6743 | ||
6744 | /* Deal with mount points that are | |
6745 | * obstructed by a later mount */ | |
6746 | ||
6747 | if (errno != ENOENT) | |
6748 | return -errno; | |
6749 | } | |
6750 | ||
6751 | } | |
6752 | } | |
6753 | } | |
1b992147 LP |
6754 | |
6755 | int fflush_and_check(FILE *f) { | |
45c196a7 | 6756 | assert(f); |
1b992147 LP |
6757 | |
6758 | errno = 0; | |
6759 | fflush(f); | |
6760 | ||
6761 | if (ferror(f)) | |
6762 | return errno ? -errno : -EIO; | |
6763 | ||
6764 | return 0; | |
6765 | } | |
2e78fa79 LP |
6766 | |
6767 | char *tempfn_xxxxxx(const char *p) { | |
6768 | const char *fn; | |
6769 | char *t; | |
6770 | size_t k; | |
6771 | ||
6772 | assert(p); | |
6773 | ||
6774 | t = new(char, strlen(p) + 1 + 6 + 1); | |
6775 | if (!t) | |
6776 | return NULL; | |
6777 | ||
6778 | fn = basename(p); | |
6779 | k = fn - p; | |
6780 | ||
6781 | strcpy(stpcpy(stpcpy(mempcpy(t, p, k), "."), fn), "XXXXXX"); | |
6782 | ||
6783 | return t; | |
6784 | } | |
6785 | ||
6786 | char *tempfn_random(const char *p) { | |
6787 | const char *fn; | |
6788 | char *t, *x; | |
6789 | uint64_t u; | |
6790 | size_t k; | |
6791 | unsigned i; | |
6792 | ||
6793 | assert(p); | |
6794 | ||
6795 | t = new(char, strlen(p) + 1 + 16 + 1); | |
6796 | if (!t) | |
6797 | return NULL; | |
6798 | ||
6799 | fn = basename(p); | |
6800 | k = fn - p; | |
6801 | ||
6802 | x = stpcpy(stpcpy(mempcpy(t, p, k), "."), fn); | |
6803 | ||
6804 | u = random_u64(); | |
6805 | for (i = 0; i < 16; i++) { | |
6806 | *(x++) = hexchar(u & 0xF); | |
6807 | u >>= 4; | |
6808 | } | |
6809 | ||
6810 | *x = 0; | |
6811 | ||
6812 | return t; | |
6813 | } | |
fecc80c1 LP |
6814 | |
6815 | /* make sure the hostname is not "localhost" */ | |
6816 | bool is_localhost(const char *hostname) { | |
6817 | assert(hostname); | |
6818 | ||
6819 | /* This tries to identify local hostnames described in RFC6761 | |
6820 | * plus the redhatism of .localdomain */ | |
6821 | ||
6822 | return streq(hostname, "localhost") || | |
6823 | streq(hostname, "localhost.") || | |
6824 | endswith(hostname, ".localhost") || | |
6825 | endswith(hostname, ".localhost.") || | |
6826 | endswith(hostname, ".localdomain") || | |
6827 | endswith(hostname, ".localdomain."); | |
6828 | } | |
45035609 LP |
6829 | |
6830 | int take_password_lock(const char *root) { | |
6831 | ||
6832 | struct flock flock = { | |
6833 | .l_type = F_WRLCK, | |
6834 | .l_whence = SEEK_SET, | |
6835 | .l_start = 0, | |
6836 | .l_len = 0, | |
6837 | }; | |
6838 | ||
6839 | const char *path; | |
6840 | int fd, r; | |
6841 | ||
6842 | /* This is roughly the same as lckpwdf(), but not as awful. We | |
6843 | * don't want to use alarm() and signals, hence we implement | |
6844 | * our own trivial version of this. | |
6845 | * | |
6846 | * Note that shadow-utils also takes per-database locks in | |
6847 | * addition to lckpwdf(). However, we don't given that they | |
6848 | * are redundant as they they invoke lckpwdf() first and keep | |
6849 | * it during everything they do. The per-database locks are | |
6850 | * awfully racy, and thus we just won't do them. */ | |
6851 | ||
6852 | if (root) | |
6853 | path = strappenda(root, "/etc/.pwd.lock"); | |
6854 | else | |
6855 | path = "/etc/.pwd.lock"; | |
6856 | ||
6857 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0600); | |
6858 | if (fd < 0) | |
6859 | return -errno; | |
6860 | ||
6861 | r = fcntl(fd, F_SETLKW, &flock); | |
6862 | if (r < 0) { | |
6863 | safe_close(fd); | |
6864 | return -errno; | |
6865 | } | |
6866 | ||
6867 | return fd; | |
6868 | } |