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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 LP |
56 | #include <sys/vfs.h> |
57 | #include <linux/magic.h> | |
0b507b17 | 58 | #include <limits.h> |
09017585 MS |
59 | #include <langinfo.h> |
60 | #include <locale.h> | |
6afc95b7 | 61 | #include <sys/personality.h> |
844ec79b | 62 | #include <libgen.h> |
2b6bf07d | 63 | #undef basename |
60918275 | 64 | |
9bf3b535 LP |
65 | #ifdef HAVE_SYS_AUXV_H |
66 | #include <sys/auxv.h> | |
67 | #endif | |
68 | ||
60918275 LP |
69 | #include "macro.h" |
70 | #include "util.h" | |
1dccbe19 LP |
71 | #include "ioprio.h" |
72 | #include "missing.h" | |
a9f5d454 | 73 | #include "log.h" |
65d2ebdc | 74 | #include "strv.h" |
e51bc1a2 | 75 | #include "label.h" |
9eb977db | 76 | #include "path-util.h" |
d06dacd0 | 77 | #include "exit-status.h" |
83cc030f | 78 | #include "hashmap.h" |
4d1a6904 | 79 | #include "env-util.h" |
a5c32cff | 80 | #include "fileio.h" |
8f6ce71f | 81 | #include "device-nodes.h" |
f405e86d SL |
82 | #include "utf8.h" |
83 | #include "gunicode.h" | |
295edddf | 84 | #include "virt.h" |
477def80 | 85 | #include "def.h" |
56cf987f | 86 | |
9a0e6896 LP |
87 | int saved_argc = 0; |
88 | char **saved_argv = NULL; | |
9086e840 | 89 | |
28917d7d | 90 | static volatile unsigned cached_columns = 0; |
ed757c0c | 91 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 92 | |
37f85e66 | 93 | size_t page_size(void) { |
ec202eae | 94 | static thread_local size_t pgsz = 0; |
37f85e66 | 95 | long r; |
96 | ||
87d2c1ff | 97 | if (_likely_(pgsz > 0)) |
37f85e66 | 98 | return pgsz; |
99 | ||
e67f47e5 LP |
100 | r = sysconf(_SC_PAGESIZE); |
101 | assert(r > 0); | |
37f85e66 | 102 | |
103 | pgsz = (size_t) r; | |
37f85e66 | 104 | return pgsz; |
105 | } | |
106 | ||
e05797fb LP |
107 | bool streq_ptr(const char *a, const char *b) { |
108 | ||
109 | /* Like streq(), but tries to make sense of NULL pointers */ | |
110 | ||
111 | if (a && b) | |
112 | return streq(a, b); | |
113 | ||
114 | if (!a && !b) | |
115 | return true; | |
116 | ||
117 | return false; | |
118 | } | |
119 | ||
8c7c140f | 120 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
121 | size_t sl, pl; |
122 | ||
123 | assert(s); | |
124 | assert(postfix); | |
125 | ||
126 | sl = strlen(s); | |
127 | pl = strlen(postfix); | |
128 | ||
d4d0d4db | 129 | if (pl == 0) |
8c7c140f | 130 | return (char*) s + sl; |
d4d0d4db | 131 | |
60918275 | 132 | if (sl < pl) |
8c7c140f LP |
133 | return NULL; |
134 | ||
135 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
136 | return NULL; | |
60918275 | 137 | |
8c7c140f | 138 | return (char*) s + sl - pl; |
60918275 LP |
139 | } |
140 | ||
79d6d816 LP |
141 | bool first_word(const char *s, const char *word) { |
142 | size_t sl, wl; | |
143 | ||
144 | assert(s); | |
145 | assert(word); | |
146 | ||
147 | sl = strlen(s); | |
148 | wl = strlen(word); | |
149 | ||
150 | if (sl < wl) | |
151 | return false; | |
152 | ||
d4d0d4db LP |
153 | if (wl == 0) |
154 | return true; | |
155 | ||
79d6d816 LP |
156 | if (memcmp(s, word, wl) != 0) |
157 | return false; | |
158 | ||
d4d0d4db LP |
159 | return s[wl] == 0 || |
160 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
161 | } |
162 | ||
42f4e3c4 | 163 | int close_nointr(int fd) { |
b0ee8068 | 164 | int r; |
60918275 | 165 | |
b0ee8068 CW |
166 | assert(fd >= 0); |
167 | r = close(fd); | |
d96ea504 | 168 | if (r >= 0) |
b0ee8068 | 169 | return r; |
d96ea504 LP |
170 | else if (errno == EINTR) |
171 | /* | |
172 | * Just ignore EINTR; a retry loop is the wrong | |
173 | * thing to do on Linux. | |
174 | * | |
175 | * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html | |
176 | * https://bugzilla.gnome.org/show_bug.cgi?id=682819 | |
177 | * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR | |
178 | * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain | |
179 | */ | |
180 | return 0; | |
b0ee8068 CW |
181 | else |
182 | return -errno; | |
60918275 | 183 | } |
85261803 | 184 | |
03e334a1 LP |
185 | int safe_close(int fd) { |
186 | ||
187 | /* | |
188 | * Like close_nointr() but cannot fail. Guarantees errno is | |
189 | * unchanged. Is a NOP with negative fds passed, and returns | |
190 | * -1, so that it can be used in this syntax: | |
191 | * | |
192 | * fd = safe_close(fd); | |
193 | */ | |
85f136b5 | 194 | |
03e334a1 LP |
195 | if (fd >= 0) { |
196 | PROTECT_ERRNO; | |
d96ea504 LP |
197 | |
198 | /* The kernel might return pretty much any error code | |
199 | * via close(), but the fd will be closed anyway. The | |
200 | * only condition we want to check for here is whether | |
201 | * the fd was invalid at all... */ | |
202 | ||
203 | assert_se(close_nointr(fd) != -EBADF); | |
03e334a1 | 204 | } |
85f136b5 | 205 | |
03e334a1 | 206 | return -1; |
85f136b5 LP |
207 | } |
208 | ||
5b6319dc LP |
209 | void close_many(const int fds[], unsigned n_fd) { |
210 | unsigned i; | |
211 | ||
2c93b4ef LP |
212 | assert(fds || n_fd <= 0); |
213 | ||
5b6319dc | 214 | for (i = 0; i < n_fd; i++) |
03e334a1 | 215 | safe_close(fds[i]); |
5b6319dc LP |
216 | } |
217 | ||
4b73a0c0 LP |
218 | int unlink_noerrno(const char *path) { |
219 | PROTECT_ERRNO; | |
220 | int r; | |
221 | ||
222 | r = unlink(path); | |
223 | if (r < 0) | |
224 | return -errno; | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
85261803 LP |
229 | int parse_boolean(const char *v) { |
230 | assert(v); | |
231 | ||
b43d1d01 | 232 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || strcaseeq(v, "on")) |
85261803 | 233 | return 1; |
b43d1d01 | 234 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || strcaseeq(v, "off")) |
85261803 LP |
235 | return 0; |
236 | ||
237 | return -EINVAL; | |
238 | } | |
239 | ||
3ba686c1 | 240 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 241 | unsigned long ul = 0; |
3ba686c1 LP |
242 | pid_t pid; |
243 | int r; | |
244 | ||
245 | assert(s); | |
246 | assert(ret_pid); | |
247 | ||
e67f47e5 LP |
248 | r = safe_atolu(s, &ul); |
249 | if (r < 0) | |
3ba686c1 LP |
250 | return r; |
251 | ||
252 | pid = (pid_t) ul; | |
253 | ||
254 | if ((unsigned long) pid != ul) | |
255 | return -ERANGE; | |
256 | ||
257 | if (pid <= 0) | |
258 | return -ERANGE; | |
259 | ||
260 | *ret_pid = pid; | |
261 | return 0; | |
262 | } | |
263 | ||
034a2a52 LP |
264 | int parse_uid(const char *s, uid_t* ret_uid) { |
265 | unsigned long ul = 0; | |
266 | uid_t uid; | |
267 | int r; | |
268 | ||
269 | assert(s); | |
270 | assert(ret_uid); | |
271 | ||
e67f47e5 LP |
272 | r = safe_atolu(s, &ul); |
273 | if (r < 0) | |
034a2a52 LP |
274 | return r; |
275 | ||
276 | uid = (uid_t) ul; | |
277 | ||
278 | if ((unsigned long) uid != ul) | |
279 | return -ERANGE; | |
280 | ||
281 | *ret_uid = uid; | |
282 | return 0; | |
283 | } | |
284 | ||
85261803 LP |
285 | int safe_atou(const char *s, unsigned *ret_u) { |
286 | char *x = NULL; | |
034c6ed7 | 287 | unsigned long l; |
85261803 LP |
288 | |
289 | assert(s); | |
290 | assert(ret_u); | |
291 | ||
292 | errno = 0; | |
293 | l = strtoul(s, &x, 0); | |
294 | ||
f3910003 | 295 | if (!x || x == s || *x || errno) |
48deb058 | 296 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 297 | |
034c6ed7 | 298 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
299 | return -ERANGE; |
300 | ||
301 | *ret_u = (unsigned) l; | |
302 | return 0; | |
303 | } | |
304 | ||
305 | int safe_atoi(const char *s, int *ret_i) { | |
306 | char *x = NULL; | |
034c6ed7 | 307 | long l; |
85261803 LP |
308 | |
309 | assert(s); | |
310 | assert(ret_i); | |
311 | ||
312 | errno = 0; | |
313 | l = strtol(s, &x, 0); | |
314 | ||
f3910003 | 315 | if (!x || x == s || *x || errno) |
48deb058 | 316 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 317 | |
034c6ed7 | 318 | if ((long) (int) l != l) |
85261803 LP |
319 | return -ERANGE; |
320 | ||
034c6ed7 LP |
321 | *ret_i = (int) l; |
322 | return 0; | |
323 | } | |
324 | ||
034c6ed7 LP |
325 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
326 | char *x = NULL; | |
327 | unsigned long long l; | |
328 | ||
329 | assert(s); | |
330 | assert(ret_llu); | |
331 | ||
332 | errno = 0; | |
333 | l = strtoull(s, &x, 0); | |
334 | ||
f3910003 | 335 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
336 | return errno ? -errno : -EINVAL; |
337 | ||
338 | *ret_llu = l; | |
339 | return 0; | |
340 | } | |
341 | ||
342 | int safe_atolli(const char *s, long long int *ret_lli) { | |
343 | char *x = NULL; | |
344 | long long l; | |
345 | ||
346 | assert(s); | |
347 | assert(ret_lli); | |
348 | ||
349 | errno = 0; | |
350 | l = strtoll(s, &x, 0); | |
351 | ||
f3910003 | 352 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
353 | return errno ? -errno : -EINVAL; |
354 | ||
355 | *ret_lli = l; | |
85261803 LP |
356 | return 0; |
357 | } | |
a41e8209 | 358 | |
f7900e25 TA |
359 | int safe_atod(const char *s, double *ret_d) { |
360 | char *x = NULL; | |
32b2634e | 361 | double d = 0; |
f7900e25 TA |
362 | |
363 | assert(s); | |
364 | assert(ret_d); | |
365 | ||
d6dd604b LP |
366 | RUN_WITH_LOCALE(LC_NUMERIC_MASK, "C") { |
367 | errno = 0; | |
368 | d = strtod(s, &x); | |
369 | } | |
f7900e25 TA |
370 | |
371 | if (!x || x == s || *x || errno) | |
372 | return errno ? -errno : -EINVAL; | |
373 | ||
374 | *ret_d = (double) d; | |
375 | return 0; | |
376 | } | |
377 | ||
bf85c24d SP |
378 | static size_t strcspn_escaped(const char *s, const char *reject) { |
379 | bool escaped = false; | |
380 | size_t n; | |
381 | ||
382 | for (n=0; s[n]; n++) { | |
383 | if (escaped) | |
384 | escaped = false; | |
385 | else if (s[n] == '\\') | |
386 | escaped = true; | |
387 | else if (strchr(reject, s[n])) | |
388 | return n; | |
389 | } | |
390 | return n; | |
391 | } | |
392 | ||
a41e8209 | 393 | /* Split a string into words. */ |
bf85c24d | 394 | char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state) { |
a41e8209 LP |
395 | char *current; |
396 | ||
397 | current = *state ? *state : (char*) c; | |
398 | ||
399 | if (!*current || *c == 0) | |
400 | return NULL; | |
401 | ||
65d2ebdc | 402 | current += strspn(current, separator); |
bf85c24d | 403 | if (!*current) |
70f75a52 LP |
404 | return NULL; |
405 | ||
bf85c24d SP |
406 | if (quoted && strchr("\'\"", *current)) { |
407 | char quotechar = *(current++); | |
408 | *l = strcspn_escaped(current, (char[]){quotechar, '\0'}); | |
409 | *state = current+*l+1; | |
410 | } else if (quoted) { | |
411 | *l = strcspn_escaped(current, separator); | |
412 | *state = current+*l; | |
034c6ed7 | 413 | } else { |
bf85c24d SP |
414 | *l = strcspn(current, separator); |
415 | *state = current+*l; | |
034c6ed7 LP |
416 | } |
417 | ||
5b12334d | 418 | return (char*) current; |
034c6ed7 LP |
419 | } |
420 | ||
034c6ed7 LP |
421 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
422 | int r; | |
b4696bce | 423 | _cleanup_free_ char *line = NULL; |
bb00e604 | 424 | long unsigned ppid; |
49aa47c7 | 425 | const char *p; |
034c6ed7 | 426 | |
49aa47c7 | 427 | assert(pid >= 0); |
034c6ed7 LP |
428 | assert(_ppid); |
429 | ||
49aa47c7 LP |
430 | if (pid == 0) { |
431 | *_ppid = getppid(); | |
432 | return 0; | |
433 | } | |
034c6ed7 | 434 | |
49aa47c7 | 435 | p = procfs_file_alloca(pid, "stat"); |
b4696bce SP |
436 | r = read_one_line_file(p, &line); |
437 | if (r < 0) | |
034c6ed7 | 438 | return r; |
034c6ed7 | 439 | |
034c6ed7 LP |
440 | /* Let's skip the pid and comm fields. The latter is enclosed |
441 | * in () but does not escape any () in its value, so let's | |
442 | * skip over it manually */ | |
443 | ||
2fbe635a LP |
444 | p = strrchr(line, ')'); |
445 | if (!p) | |
034c6ed7 LP |
446 | return -EIO; |
447 | ||
448 | p++; | |
449 | ||
450 | if (sscanf(p, " " | |
451 | "%*c " /* state */ | |
bb00e604 | 452 | "%lu ", /* ppid */ |
034c6ed7 LP |
453 | &ppid) != 1) |
454 | return -EIO; | |
455 | ||
bb00e604 | 456 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
457 | return -ERANGE; |
458 | ||
459 | *_ppid = (pid_t) ppid; | |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
7640a5de | 464 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
b4696bce SP |
465 | int r; |
466 | _cleanup_free_ char *line = NULL; | |
49aa47c7 | 467 | const char *p; |
7640a5de | 468 | |
49aa47c7 | 469 | assert(pid >= 0); |
7640a5de LP |
470 | assert(st); |
471 | ||
b68fa010 | 472 | p = procfs_file_alloca(pid, "stat"); |
b4696bce SP |
473 | r = read_one_line_file(p, &line); |
474 | if (r < 0) | |
475 | return r; | |
7640a5de LP |
476 | |
477 | /* Let's skip the pid and comm fields. The latter is enclosed | |
478 | * in () but does not escape any () in its value, so let's | |
479 | * skip over it manually */ | |
480 | ||
e67f47e5 LP |
481 | p = strrchr(line, ')'); |
482 | if (!p) | |
7640a5de LP |
483 | return -EIO; |
484 | ||
485 | p++; | |
486 | ||
487 | if (sscanf(p, " " | |
488 | "%*c " /* state */ | |
489 | "%*d " /* ppid */ | |
490 | "%*d " /* pgrp */ | |
491 | "%*d " /* session */ | |
492 | "%*d " /* tty_nr */ | |
493 | "%*d " /* tpgid */ | |
494 | "%*u " /* flags */ | |
495 | "%*u " /* minflt */ | |
496 | "%*u " /* cminflt */ | |
497 | "%*u " /* majflt */ | |
498 | "%*u " /* cmajflt */ | |
499 | "%*u " /* utime */ | |
500 | "%*u " /* stime */ | |
501 | "%*d " /* cutime */ | |
502 | "%*d " /* cstime */ | |
503 | "%*d " /* priority */ | |
504 | "%*d " /* nice */ | |
505 | "%*d " /* num_threads */ | |
506 | "%*d " /* itrealvalue */ | |
507 | "%llu " /* starttime */, | |
508 | st) != 1) | |
509 | return -EIO; | |
510 | ||
511 | return 0; | |
512 | } | |
513 | ||
34ca941c LP |
514 | int fchmod_umask(int fd, mode_t m) { |
515 | mode_t u; | |
516 | int r; | |
517 | ||
518 | u = umask(0777); | |
519 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
520 | umask(u); | |
521 | ||
522 | return r; | |
523 | } | |
524 | ||
7072ced8 LP |
525 | char *truncate_nl(char *s) { |
526 | assert(s); | |
527 | ||
528 | s[strcspn(s, NEWLINE)] = 0; | |
529 | return s; | |
530 | } | |
531 | ||
93b5eaec | 532 | int get_process_state(pid_t pid) { |
e10c9985 YS |
533 | const char *p; |
534 | char state; | |
535 | int r; | |
536 | _cleanup_free_ char *line = NULL; | |
537 | ||
538 | assert(pid >= 0); | |
539 | ||
540 | p = procfs_file_alloca(pid, "stat"); | |
541 | r = read_one_line_file(p, &line); | |
542 | if (r < 0) | |
543 | return r; | |
544 | ||
545 | p = strrchr(line, ')'); | |
546 | if (!p) | |
547 | return -EIO; | |
548 | ||
549 | p++; | |
550 | ||
551 | if (sscanf(p, " %c", &state) != 1) | |
552 | return -EIO; | |
553 | ||
554 | return (unsigned char) state; | |
555 | } | |
556 | ||
87d2c1ff | 557 | int get_process_comm(pid_t pid, char **name) { |
49aa47c7 | 558 | const char *p; |
5b12334d | 559 | int r; |
7072ced8 | 560 | |
7072ced8 | 561 | assert(name); |
49aa47c7 | 562 | assert(pid >= 0); |
7072ced8 | 563 | |
b68fa010 | 564 | p = procfs_file_alloca(pid, "comm"); |
7072ced8 | 565 | |
5b12334d LP |
566 | r = read_one_line_file(p, name); |
567 | if (r == -ENOENT) | |
568 | return -ESRCH; | |
569 | ||
570 | return r; | |
7072ced8 LP |
571 | } |
572 | ||
87d2c1ff | 573 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
49aa47c7 | 574 | _cleanup_fclose_ FILE *f = NULL; |
9bdbc2e2 | 575 | char *r = NULL, *k; |
49aa47c7 | 576 | const char *p; |
c59760ee | 577 | int c; |
c59760ee | 578 | |
c59760ee | 579 | assert(line); |
49aa47c7 | 580 | assert(pid >= 0); |
c59760ee | 581 | |
b68fa010 | 582 | p = procfs_file_alloca(pid, "cmdline"); |
c59760ee | 583 | |
49aa47c7 | 584 | f = fopen(p, "re"); |
c59760ee LP |
585 | if (!f) |
586 | return -errno; | |
49aa47c7 | 587 | |
9bdbc2e2 | 588 | if (max_length == 0) { |
49aa47c7 LP |
589 | size_t len = 0, allocated = 0; |
590 | ||
9bdbc2e2 | 591 | while ((c = getc(f)) != EOF) { |
49aa47c7 LP |
592 | |
593 | if (!GREEDY_REALLOC(r, allocated, len+2)) { | |
9bdbc2e2 | 594 | free(r); |
9bdbc2e2 LN |
595 | return -ENOMEM; |
596 | } | |
49aa47c7 LP |
597 | |
598 | r[len++] = isprint(c) ? c : ' '; | |
9bdbc2e2 | 599 | } |
49aa47c7 LP |
600 | |
601 | if (len > 0) | |
602 | r[len-1] = 0; | |
603 | ||
9bdbc2e2 LN |
604 | } else { |
605 | bool space = false; | |
606 | size_t left; | |
49aa47c7 | 607 | |
9bdbc2e2 | 608 | r = new(char, max_length); |
49aa47c7 | 609 | if (!r) |
9bdbc2e2 | 610 | return -ENOMEM; |
c59760ee | 611 | |
9bdbc2e2 LN |
612 | k = r; |
613 | left = max_length; | |
614 | while ((c = getc(f)) != EOF) { | |
c59760ee | 615 | |
9bdbc2e2 LN |
616 | if (isprint(c)) { |
617 | if (space) { | |
618 | if (left <= 4) | |
619 | break; | |
620 | ||
621 | *(k++) = ' '; | |
622 | left--; | |
623 | space = false; | |
624 | } | |
c59760ee | 625 | |
c59760ee LP |
626 | if (left <= 4) |
627 | break; | |
628 | ||
9bdbc2e2 | 629 | *(k++) = (char) c; |
057fbb58 | 630 | left--; |
9bdbc2e2 LN |
631 | } else |
632 | space = true; | |
633 | } | |
c59760ee | 634 | |
9bdbc2e2 LN |
635 | if (left <= 4) { |
636 | size_t n = MIN(left-1, 3U); | |
637 | memcpy(k, "...", n); | |
638 | k[n] = 0; | |
639 | } else | |
640 | *k = 0; | |
c59760ee LP |
641 | } |
642 | ||
35d2e7ec | 643 | /* Kernel threads have no argv[] */ |
9bdbc2e2 | 644 | if (r == NULL || r[0] == 0) { |
b47d419c | 645 | _cleanup_free_ char *t = NULL; |
35d2e7ec LP |
646 | int h; |
647 | ||
648 | free(r); | |
649 | ||
87d2c1ff LP |
650 | if (!comm_fallback) |
651 | return -ENOENT; | |
652 | ||
653 | h = get_process_comm(pid, &t); | |
654 | if (h < 0) | |
35d2e7ec LP |
655 | return h; |
656 | ||
b7def684 | 657 | r = strjoin("[", t, "]", NULL); |
87d2c1ff | 658 | if (!r) |
35d2e7ec LP |
659 | return -ENOMEM; |
660 | } | |
fa776d8e | 661 | |
c59760ee LP |
662 | *line = r; |
663 | return 0; | |
664 | } | |
665 | ||
1e5678d0 | 666 | int is_kernel_thread(pid_t pid) { |
49aa47c7 | 667 | const char *p; |
1e5678d0 LP |
668 | size_t count; |
669 | char c; | |
670 | bool eof; | |
671 | FILE *f; | |
672 | ||
673 | if (pid == 0) | |
674 | return 0; | |
675 | ||
49aa47c7 | 676 | assert(pid > 0); |
1e5678d0 | 677 | |
49aa47c7 LP |
678 | p = procfs_file_alloca(pid, "cmdline"); |
679 | f = fopen(p, "re"); | |
1e5678d0 LP |
680 | if (!f) |
681 | return -errno; | |
682 | ||
683 | count = fread(&c, 1, 1, f); | |
684 | eof = feof(f); | |
685 | fclose(f); | |
686 | ||
687 | /* Kernel threads have an empty cmdline */ | |
688 | ||
689 | if (count <= 0) | |
690 | return eof ? 1 : -errno; | |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
3a832116 SL |
695 | int get_process_capeff(pid_t pid, char **capeff) { |
696 | const char *p; | |
3a832116 SL |
697 | |
698 | assert(capeff); | |
699 | assert(pid >= 0); | |
700 | ||
b68fa010 | 701 | p = procfs_file_alloca(pid, "status"); |
3a832116 | 702 | |
69ab8088 | 703 | return get_status_field(p, "\nCapEff:", capeff); |
3a832116 | 704 | } |
49aa47c7 | 705 | |
87d2c1ff | 706 | int get_process_exe(pid_t pid, char **name) { |
49aa47c7 | 707 | const char *p; |
e79f68d1 ZJS |
708 | char *d; |
709 | int r; | |
87d2c1ff | 710 | |
49aa47c7 | 711 | assert(pid >= 0); |
87d2c1ff LP |
712 | assert(name); |
713 | ||
b68fa010 | 714 | p = procfs_file_alloca(pid, "exe"); |
87d2c1ff | 715 | |
e79f68d1 ZJS |
716 | r = readlink_malloc(p, name); |
717 | if (r < 0) | |
5b12334d | 718 | return r == -ENOENT ? -ESRCH : r; |
e79f68d1 ZJS |
719 | |
720 | d = endswith(*name, " (deleted)"); | |
721 | if (d) | |
722 | *d = '\0'; | |
723 | ||
724 | return 0; | |
87d2c1ff LP |
725 | } |
726 | ||
901c3d0d | 727 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
f74e605f | 728 | _cleanup_fclose_ FILE *f = NULL; |
9db11a99 | 729 | char line[LINE_MAX]; |
49aa47c7 | 730 | const char *p; |
7e4ab3c5 | 731 | |
f74e605f | 732 | assert(field); |
7e4ab3c5 LP |
733 | assert(uid); |
734 | ||
735 | if (pid == 0) | |
736 | return getuid(); | |
737 | ||
49aa47c7 LP |
738 | p = procfs_file_alloca(pid, "status"); |
739 | f = fopen(p, "re"); | |
7e4ab3c5 LP |
740 | if (!f) |
741 | return -errno; | |
742 | ||
9db11a99 | 743 | FOREACH_LINE(line, f, return -errno) { |
f74e605f | 744 | char *l; |
7e4ab3c5 LP |
745 | |
746 | l = strstrip(line); | |
747 | ||
901c3d0d LP |
748 | if (startswith(l, field)) { |
749 | l += strlen(field); | |
7e4ab3c5 LP |
750 | l += strspn(l, WHITESPACE); |
751 | ||
752 | l[strcspn(l, WHITESPACE)] = 0; | |
753 | ||
f74e605f | 754 | return parse_uid(l, uid); |
7e4ab3c5 LP |
755 | } |
756 | } | |
757 | ||
f74e605f | 758 | return -EIO; |
7e4ab3c5 LP |
759 | } |
760 | ||
901c3d0d LP |
761 | int get_process_uid(pid_t pid, uid_t *uid) { |
762 | return get_process_id(pid, "Uid:", uid); | |
763 | } | |
764 | ||
765 | int get_process_gid(pid_t pid, gid_t *gid) { | |
49aa47c7 | 766 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); |
901c3d0d LP |
767 | return get_process_id(pid, "Gid:", gid); |
768 | } | |
769 | ||
fab56fc5 LP |
770 | char *strnappend(const char *s, const char *suffix, size_t b) { |
771 | size_t a; | |
44d8db9e LP |
772 | char *r; |
773 | ||
fab56fc5 LP |
774 | if (!s && !suffix) |
775 | return strdup(""); | |
776 | ||
777 | if (!s) | |
778 | return strndup(suffix, b); | |
779 | ||
780 | if (!suffix) | |
781 | return strdup(s); | |
782 | ||
44d8db9e LP |
783 | assert(s); |
784 | assert(suffix); | |
785 | ||
786 | a = strlen(s); | |
aa408e77 | 787 | if (b > ((size_t) -1) - a) |
040f18ea | 788 | return NULL; |
44d8db9e | 789 | |
040f18ea LP |
790 | r = new(char, a+b+1); |
791 | if (!r) | |
44d8db9e LP |
792 | return NULL; |
793 | ||
794 | memcpy(r, s, a); | |
795 | memcpy(r+a, suffix, b); | |
796 | r[a+b] = 0; | |
797 | ||
798 | return r; | |
799 | } | |
87f0e418 | 800 | |
fab56fc5 LP |
801 | char *strappend(const char *s, const char *suffix) { |
802 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
803 | } | |
804 | ||
2d2ebd6b | 805 | int readlink_malloc(const char *p, char **ret) { |
87f0e418 | 806 | size_t l = 100; |
2d2ebd6b | 807 | int r; |
87f0e418 LP |
808 | |
809 | assert(p); | |
2d2ebd6b | 810 | assert(ret); |
87f0e418 LP |
811 | |
812 | for (;;) { | |
813 | char *c; | |
814 | ssize_t n; | |
815 | ||
2d2ebd6b LP |
816 | c = new(char, l); |
817 | if (!c) | |
87f0e418 LP |
818 | return -ENOMEM; |
819 | ||
2d2ebd6b LP |
820 | n = readlink(p, c, l-1); |
821 | if (n < 0) { | |
822 | r = -errno; | |
87f0e418 | 823 | free(c); |
2d2ebd6b | 824 | return r; |
87f0e418 LP |
825 | } |
826 | ||
827 | if ((size_t) n < l-1) { | |
828 | c[n] = 0; | |
2d2ebd6b | 829 | *ret = c; |
87f0e418 LP |
830 | return 0; |
831 | } | |
832 | ||
833 | free(c); | |
834 | l *= 2; | |
835 | } | |
836 | } | |
837 | ||
2c7108c4 | 838 | int readlink_and_make_absolute(const char *p, char **r) { |
1058cbf2 ZJS |
839 | _cleanup_free_ char *target = NULL; |
840 | char *k; | |
2c7108c4 LP |
841 | int j; |
842 | ||
843 | assert(p); | |
844 | assert(r); | |
845 | ||
1058cbf2 ZJS |
846 | j = readlink_malloc(p, &target); |
847 | if (j < 0) | |
2c7108c4 LP |
848 | return j; |
849 | ||
850 | k = file_in_same_dir(p, target); | |
2c7108c4 LP |
851 | if (!k) |
852 | return -ENOMEM; | |
853 | ||
854 | *r = k; | |
855 | return 0; | |
856 | } | |
857 | ||
83096483 LP |
858 | int readlink_and_canonicalize(const char *p, char **r) { |
859 | char *t, *s; | |
860 | int j; | |
861 | ||
862 | assert(p); | |
863 | assert(r); | |
864 | ||
865 | j = readlink_and_make_absolute(p, &t); | |
866 | if (j < 0) | |
867 | return j; | |
868 | ||
869 | s = canonicalize_file_name(t); | |
870 | if (s) { | |
871 | free(t); | |
872 | *r = s; | |
873 | } else | |
874 | *r = t; | |
875 | ||
876 | path_kill_slashes(*r); | |
877 | ||
878 | return 0; | |
879 | } | |
880 | ||
2a987ee8 LP |
881 | int reset_all_signal_handlers(void) { |
882 | int sig; | |
883 | ||
884 | for (sig = 1; sig < _NSIG; sig++) { | |
b92bea5d ZJS |
885 | struct sigaction sa = { |
886 | .sa_handler = SIG_DFL, | |
887 | .sa_flags = SA_RESTART, | |
888 | }; | |
2a987ee8 LP |
889 | |
890 | if (sig == SIGKILL || sig == SIGSTOP) | |
891 | continue; | |
892 | ||
2a987ee8 LP |
893 | /* On Linux the first two RT signals are reserved by |
894 | * glibc, and sigaction() will return EINVAL for them. */ | |
895 | if ((sigaction(sig, &sa, NULL) < 0)) | |
896 | if (errno != EINVAL) | |
897 | return -errno; | |
898 | } | |
899 | ||
8e274523 | 900 | return 0; |
2a987ee8 | 901 | } |
4a72ff34 LP |
902 | |
903 | char *strstrip(char *s) { | |
57a8eca8 | 904 | char *e; |
4a72ff34 LP |
905 | |
906 | /* Drops trailing whitespace. Modifies the string in | |
907 | * place. Returns pointer to first non-space character */ | |
908 | ||
909 | s += strspn(s, WHITESPACE); | |
910 | ||
57a8eca8 LP |
911 | for (e = strchr(s, 0); e > s; e --) |
912 | if (!strchr(WHITESPACE, e[-1])) | |
913 | break; | |
4a72ff34 | 914 | |
57a8eca8 | 915 | *e = 0; |
4a72ff34 LP |
916 | |
917 | return s; | |
4a72ff34 LP |
918 | } |
919 | ||
ee9b5e01 LP |
920 | char *delete_chars(char *s, const char *bad) { |
921 | char *f, *t; | |
922 | ||
923 | /* Drops all whitespace, regardless where in the string */ | |
924 | ||
925 | for (f = s, t = s; *f; f++) { | |
926 | if (strchr(bad, *f)) | |
927 | continue; | |
928 | ||
929 | *(t++) = *f; | |
930 | } | |
931 | ||
932 | *t = 0; | |
933 | ||
934 | return s; | |
935 | } | |
936 | ||
4a72ff34 LP |
937 | char *file_in_same_dir(const char *path, const char *filename) { |
938 | char *e, *r; | |
939 | size_t k; | |
940 | ||
941 | assert(path); | |
942 | assert(filename); | |
943 | ||
944 | /* This removes the last component of path and appends | |
945 | * filename, unless the latter is absolute anyway or the | |
946 | * former isn't */ | |
947 | ||
948 | if (path_is_absolute(filename)) | |
949 | return strdup(filename); | |
950 | ||
951 | if (!(e = strrchr(path, '/'))) | |
952 | return strdup(filename); | |
953 | ||
954 | k = strlen(filename); | |
955 | if (!(r = new(char, e-path+1+k+1))) | |
956 | return NULL; | |
957 | ||
958 | memcpy(r, path, e-path+1); | |
959 | memcpy(r+(e-path)+1, filename, k+1); | |
960 | ||
961 | return r; | |
962 | } | |
fb624d04 | 963 | |
c32dd69b LP |
964 | int rmdir_parents(const char *path, const char *stop) { |
965 | size_t l; | |
966 | int r = 0; | |
967 | ||
968 | assert(path); | |
969 | assert(stop); | |
970 | ||
971 | l = strlen(path); | |
972 | ||
973 | /* Skip trailing slashes */ | |
974 | while (l > 0 && path[l-1] == '/') | |
975 | l--; | |
976 | ||
977 | while (l > 0) { | |
978 | char *t; | |
979 | ||
980 | /* Skip last component */ | |
981 | while (l > 0 && path[l-1] != '/') | |
982 | l--; | |
983 | ||
984 | /* Skip trailing slashes */ | |
985 | while (l > 0 && path[l-1] == '/') | |
986 | l--; | |
987 | ||
988 | if (l <= 0) | |
989 | break; | |
990 | ||
991 | if (!(t = strndup(path, l))) | |
992 | return -ENOMEM; | |
993 | ||
994 | if (path_startswith(stop, t)) { | |
995 | free(t); | |
996 | return 0; | |
997 | } | |
998 | ||
999 | r = rmdir(t); | |
1000 | free(t); | |
1001 | ||
1002 | if (r < 0) | |
1003 | if (errno != ENOENT) | |
1004 | return -errno; | |
1005 | } | |
1006 | ||
1007 | return 0; | |
1008 | } | |
1009 | ||
fb624d04 LP |
1010 | char hexchar(int x) { |
1011 | static const char table[16] = "0123456789abcdef"; | |
1012 | ||
1013 | return table[x & 15]; | |
1014 | } | |
4fe88d28 LP |
1015 | |
1016 | int unhexchar(char c) { | |
1017 | ||
1018 | if (c >= '0' && c <= '9') | |
1019 | return c - '0'; | |
1020 | ||
1021 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1022 | return c - 'a' + 10; |
4fe88d28 LP |
1023 | |
1024 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1025 | return c - 'A' + 10; |
4fe88d28 LP |
1026 | |
1027 | return -1; | |
1028 | } | |
1029 | ||
66e35261 LP |
1030 | char *hexmem(const void *p, size_t l) { |
1031 | char *r, *z; | |
1032 | const uint8_t *x; | |
1033 | ||
1034 | z = r = malloc(l * 2 + 1); | |
1035 | if (!r) | |
1036 | return NULL; | |
1037 | ||
1038 | for (x = p; x < (const uint8_t*) p + l; x++) { | |
1039 | *(z++) = hexchar(*x >> 4); | |
1040 | *(z++) = hexchar(*x & 15); | |
1041 | } | |
1042 | ||
1043 | *z = 0; | |
1044 | return r; | |
1045 | } | |
1046 | ||
2181a7f5 LP |
1047 | void *unhexmem(const char *p, size_t l) { |
1048 | uint8_t *r, *z; | |
1049 | const char *x; | |
1050 | ||
1051 | assert(p); | |
1052 | ||
1053 | z = r = malloc((l + 1) / 2 + 1); | |
1054 | if (!r) | |
1055 | return NULL; | |
1056 | ||
1057 | for (x = p; x < p + l; x += 2) { | |
1058 | int a, b; | |
1059 | ||
1060 | a = unhexchar(x[0]); | |
1061 | if (x+1 < p + l) | |
1062 | b = unhexchar(x[1]); | |
1063 | else | |
1064 | b = 0; | |
1065 | ||
1066 | *(z++) = (uint8_t) a << 4 | (uint8_t) b; | |
1067 | } | |
1068 | ||
1069 | *z = 0; | |
1070 | return r; | |
1071 | } | |
1072 | ||
4fe88d28 LP |
1073 | char octchar(int x) { |
1074 | return '0' + (x & 7); | |
1075 | } | |
1076 | ||
1077 | int unoctchar(char c) { | |
1078 | ||
1079 | if (c >= '0' && c <= '7') | |
1080 | return c - '0'; | |
1081 | ||
1082 | return -1; | |
1083 | } | |
1084 | ||
5af98f82 LP |
1085 | char decchar(int x) { |
1086 | return '0' + (x % 10); | |
1087 | } | |
1088 | ||
1089 | int undecchar(char c) { | |
1090 | ||
1091 | if (c >= '0' && c <= '9') | |
1092 | return c - '0'; | |
1093 | ||
1094 | return -1; | |
1095 | } | |
1096 | ||
4fe88d28 LP |
1097 | char *cescape(const char *s) { |
1098 | char *r, *t; | |
1099 | const char *f; | |
1100 | ||
1101 | assert(s); | |
1102 | ||
1103 | /* Does C style string escaping. */ | |
1104 | ||
f8e2fb7b LP |
1105 | r = new(char, strlen(s)*4 + 1); |
1106 | if (!r) | |
4fe88d28 LP |
1107 | return NULL; |
1108 | ||
1109 | for (f = s, t = r; *f; f++) | |
1110 | ||
1111 | switch (*f) { | |
1112 | ||
1113 | case '\a': | |
1114 | *(t++) = '\\'; | |
1115 | *(t++) = 'a'; | |
1116 | break; | |
1117 | case '\b': | |
1118 | *(t++) = '\\'; | |
1119 | *(t++) = 'b'; | |
1120 | break; | |
1121 | case '\f': | |
1122 | *(t++) = '\\'; | |
1123 | *(t++) = 'f'; | |
1124 | break; | |
1125 | case '\n': | |
1126 | *(t++) = '\\'; | |
1127 | *(t++) = 'n'; | |
1128 | break; | |
1129 | case '\r': | |
1130 | *(t++) = '\\'; | |
1131 | *(t++) = 'r'; | |
1132 | break; | |
1133 | case '\t': | |
1134 | *(t++) = '\\'; | |
1135 | *(t++) = 't'; | |
1136 | break; | |
1137 | case '\v': | |
1138 | *(t++) = '\\'; | |
1139 | *(t++) = 'v'; | |
1140 | break; | |
1141 | case '\\': | |
1142 | *(t++) = '\\'; | |
1143 | *(t++) = '\\'; | |
1144 | break; | |
1145 | case '"': | |
1146 | *(t++) = '\\'; | |
1147 | *(t++) = '"'; | |
1148 | break; | |
1149 | case '\'': | |
1150 | *(t++) = '\\'; | |
1151 | *(t++) = '\''; | |
1152 | break; | |
1153 | ||
1154 | default: | |
1155 | /* For special chars we prefer octal over | |
1156 | * hexadecimal encoding, simply because glib's | |
1157 | * g_strescape() does the same */ | |
1158 | if ((*f < ' ') || (*f >= 127)) { | |
1159 | *(t++) = '\\'; | |
1160 | *(t++) = octchar((unsigned char) *f >> 6); | |
1161 | *(t++) = octchar((unsigned char) *f >> 3); | |
1162 | *(t++) = octchar((unsigned char) *f); | |
1163 | } else | |
1164 | *(t++) = *f; | |
1165 | break; | |
1166 | } | |
1167 | ||
1168 | *t = 0; | |
1169 | ||
1170 | return r; | |
1171 | } | |
1172 | ||
5b4c61cd | 1173 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1174 | char *r, *t; |
1175 | const char *f; | |
5b4c61cd | 1176 | size_t pl; |
4fe88d28 LP |
1177 | |
1178 | assert(s); | |
1179 | ||
5b4c61cd LP |
1180 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1181 | ||
1182 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1183 | |
5b4c61cd | 1184 | r = new(char, pl+length+1); |
7f110ff9 | 1185 | if (!r) |
4fe88d28 LP |
1186 | return r; |
1187 | ||
5b4c61cd LP |
1188 | if (prefix) |
1189 | memcpy(r, prefix, pl); | |
1190 | ||
1191 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1192 | |
1193 | if (*f != '\\') { | |
1194 | *(t++) = *f; | |
1195 | continue; | |
1196 | } | |
1197 | ||
1198 | f++; | |
1199 | ||
1200 | switch (*f) { | |
1201 | ||
1202 | case 'a': | |
1203 | *(t++) = '\a'; | |
1204 | break; | |
1205 | case 'b': | |
1206 | *(t++) = '\b'; | |
1207 | break; | |
1208 | case 'f': | |
1209 | *(t++) = '\f'; | |
1210 | break; | |
1211 | case 'n': | |
1212 | *(t++) = '\n'; | |
1213 | break; | |
1214 | case 'r': | |
1215 | *(t++) = '\r'; | |
1216 | break; | |
1217 | case 't': | |
1218 | *(t++) = '\t'; | |
1219 | break; | |
1220 | case 'v': | |
1221 | *(t++) = '\v'; | |
1222 | break; | |
1223 | case '\\': | |
1224 | *(t++) = '\\'; | |
1225 | break; | |
1226 | case '"': | |
1227 | *(t++) = '"'; | |
1228 | break; | |
1229 | case '\'': | |
1230 | *(t++) = '\''; | |
1231 | break; | |
1232 | ||
e167fb86 LP |
1233 | case 's': |
1234 | /* This is an extension of the XDG syntax files */ | |
1235 | *(t++) = ' '; | |
1236 | break; | |
1237 | ||
4fe88d28 LP |
1238 | case 'x': { |
1239 | /* hexadecimal encoding */ | |
1240 | int a, b; | |
1241 | ||
7f110ff9 LP |
1242 | a = unhexchar(f[1]); |
1243 | b = unhexchar(f[2]); | |
1244 | ||
1245 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1246 | /* Invalid escape code, let's take it literal then */ |
1247 | *(t++) = '\\'; | |
1248 | *(t++) = 'x'; | |
1249 | } else { | |
1250 | *(t++) = (char) ((a << 4) | b); | |
1251 | f += 2; | |
1252 | } | |
1253 | ||
1254 | break; | |
1255 | } | |
1256 | ||
1257 | case '0': | |
1258 | case '1': | |
1259 | case '2': | |
1260 | case '3': | |
1261 | case '4': | |
1262 | case '5': | |
1263 | case '6': | |
1264 | case '7': { | |
1265 | /* octal encoding */ | |
1266 | int a, b, c; | |
1267 | ||
7f110ff9 LP |
1268 | a = unoctchar(f[0]); |
1269 | b = unoctchar(f[1]); | |
1270 | c = unoctchar(f[2]); | |
1271 | ||
1272 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1273 | /* Invalid escape code, let's take it literal then */ |
1274 | *(t++) = '\\'; | |
1275 | *(t++) = f[0]; | |
1276 | } else { | |
1277 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1278 | f += 2; | |
1279 | } | |
1280 | ||
1281 | break; | |
1282 | } | |
1283 | ||
1284 | case 0: | |
1285 | /* premature end of string.*/ | |
1286 | *(t++) = '\\'; | |
1287 | goto finish; | |
1288 | ||
1289 | default: | |
1290 | /* Invalid escape code, let's take it literal then */ | |
1291 | *(t++) = '\\'; | |
f3d4cc01 | 1292 | *(t++) = *f; |
4fe88d28 LP |
1293 | break; |
1294 | } | |
1295 | } | |
1296 | ||
1297 | finish: | |
1298 | *t = 0; | |
1299 | return r; | |
1300 | } | |
1301 | ||
5b4c61cd LP |
1302 | char *cunescape_length(const char *s, size_t length) { |
1303 | return cunescape_length_with_prefix(s, length, NULL); | |
1304 | } | |
1305 | ||
6febfd0d | 1306 | char *cunescape(const char *s) { |
5b4c61cd LP |
1307 | assert(s); |
1308 | ||
6febfd0d LP |
1309 | return cunescape_length(s, strlen(s)); |
1310 | } | |
4fe88d28 LP |
1311 | |
1312 | char *xescape(const char *s, const char *bad) { | |
1313 | char *r, *t; | |
1314 | const char *f; | |
1315 | ||
1316 | /* Escapes all chars in bad, in addition to \ and all special | |
1317 | * chars, in \xFF style escaping. May be reversed with | |
1318 | * cunescape. */ | |
1319 | ||
08ace05b LP |
1320 | r = new(char, strlen(s) * 4 + 1); |
1321 | if (!r) | |
4fe88d28 LP |
1322 | return NULL; |
1323 | ||
1324 | for (f = s, t = r; *f; f++) { | |
1325 | ||
b866264a LP |
1326 | if ((*f < ' ') || (*f >= 127) || |
1327 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1328 | *(t++) = '\\'; |
1329 | *(t++) = 'x'; | |
1330 | *(t++) = hexchar(*f >> 4); | |
1331 | *(t++) = hexchar(*f); | |
1332 | } else | |
1333 | *(t++) = *f; | |
1334 | } | |
1335 | ||
1336 | *t = 0; | |
1337 | ||
1338 | return r; | |
1339 | } | |
1340 | ||
67d51650 | 1341 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1342 | char *p; |
1343 | ||
67d51650 | 1344 | assert(t); |
4fe88d28 | 1345 | |
67d51650 | 1346 | for (p = t; *p; p++) |
4fe88d28 LP |
1347 | if (*p >= 'A' && *p <= 'Z') |
1348 | *p = *p - 'A' + 'a'; | |
1349 | ||
67d51650 | 1350 | return t; |
4fe88d28 | 1351 | } |
1dccbe19 | 1352 | |
44a6b1b6 | 1353 | _pure_ static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1354 | assert(filename); |
1355 | ||
1356 | return | |
1357 | filename[0] == '.' || | |
6c78be3c | 1358 | streq(filename, "lost+found") || |
e472d476 LP |
1359 | streq(filename, "aquota.user") || |
1360 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1361 | endswith(filename, ".rpmnew") || |
1362 | endswith(filename, ".rpmsave") || | |
1363 | endswith(filename, ".rpmorig") || | |
1364 | endswith(filename, ".dpkg-old") || | |
1365 | endswith(filename, ".dpkg-new") || | |
1366 | endswith(filename, ".swp"); | |
1367 | } | |
1368 | ||
a228a22f LP |
1369 | bool ignore_file(const char *filename) { |
1370 | assert(filename); | |
1371 | ||
1372 | if (endswith(filename, "~")) | |
1373 | return false; | |
1374 | ||
1375 | return ignore_file_allow_backup(filename); | |
1376 | } | |
1377 | ||
3a0ecb08 LP |
1378 | int fd_nonblock(int fd, bool nonblock) { |
1379 | int flags; | |
1380 | ||
1381 | assert(fd >= 0); | |
1382 | ||
1383 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1384 | return -errno; | |
1385 | ||
1386 | if (nonblock) | |
1387 | flags |= O_NONBLOCK; | |
1388 | else | |
1389 | flags &= ~O_NONBLOCK; | |
1390 | ||
1391 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1392 | return -errno; | |
1393 | ||
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | int fd_cloexec(int fd, bool cloexec) { | |
1398 | int flags; | |
1399 | ||
1400 | assert(fd >= 0); | |
1401 | ||
1402 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1403 | return -errno; | |
1404 | ||
1405 | if (cloexec) | |
1406 | flags |= FD_CLOEXEC; | |
1407 | else | |
1408 | flags &= ~FD_CLOEXEC; | |
1409 | ||
1410 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1411 | return -errno; | |
1412 | ||
1413 | return 0; | |
1414 | } | |
1415 | ||
44a6b1b6 | 1416 | _pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
b19be9eb LP |
1417 | unsigned i; |
1418 | ||
1419 | assert(n_fdset == 0 || fdset); | |
1420 | ||
1421 | for (i = 0; i < n_fdset; i++) | |
1422 | if (fdset[i] == fd) | |
1423 | return true; | |
1424 | ||
1425 | return false; | |
1426 | } | |
1427 | ||
a0d40ac5 LP |
1428 | int close_all_fds(const int except[], unsigned n_except) { |
1429 | DIR *d; | |
1430 | struct dirent *de; | |
1431 | int r = 0; | |
1432 | ||
b19be9eb LP |
1433 | assert(n_except == 0 || except); |
1434 | ||
1435 | d = opendir("/proc/self/fd"); | |
1436 | if (!d) { | |
1437 | int fd; | |
1438 | struct rlimit rl; | |
1439 | ||
1440 | /* When /proc isn't available (for example in chroots) | |
1441 | * the fallback is brute forcing through the fd | |
1442 | * table */ | |
1443 | ||
1444 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1445 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1446 | ||
1447 | if (fd_in_set(fd, except, n_except)) | |
1448 | continue; | |
1449 | ||
1450 | if (close_nointr(fd) < 0) | |
1451 | if (errno != EBADF && r == 0) | |
1452 | r = -errno; | |
1453 | } | |
1454 | ||
1455 | return r; | |
1456 | } | |
a0d40ac5 LP |
1457 | |
1458 | while ((de = readdir(d))) { | |
a7610064 | 1459 | int fd = -1; |
a0d40ac5 | 1460 | |
a16e1123 | 1461 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1462 | continue; |
1463 | ||
720ce21d LP |
1464 | if (safe_atoi(de->d_name, &fd) < 0) |
1465 | /* Let's better ignore this, just in case */ | |
1466 | continue; | |
a0d40ac5 LP |
1467 | |
1468 | if (fd < 3) | |
1469 | continue; | |
1470 | ||
1471 | if (fd == dirfd(d)) | |
1472 | continue; | |
1473 | ||
b19be9eb LP |
1474 | if (fd_in_set(fd, except, n_except)) |
1475 | continue; | |
a0d40ac5 | 1476 | |
720ce21d | 1477 | if (close_nointr(fd) < 0) { |
2f357920 | 1478 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1479 | if (errno != EBADF && r == 0) |
1480 | r = -errno; | |
2f357920 | 1481 | } |
a0d40ac5 LP |
1482 | } |
1483 | ||
a0d40ac5 LP |
1484 | closedir(d); |
1485 | return r; | |
1486 | } | |
1487 | ||
db12775d LP |
1488 | bool chars_intersect(const char *a, const char *b) { |
1489 | const char *p; | |
1490 | ||
1491 | /* Returns true if any of the chars in a are in b. */ | |
1492 | for (p = a; *p; p++) | |
1493 | if (strchr(b, *p)) | |
1494 | return true; | |
1495 | ||
1496 | return false; | |
1497 | } | |
1498 | ||
42856c10 | 1499 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
1500 | static const char table[] = |
1501 | "cifs\0" | |
1502 | "smbfs\0" | |
1503 | "ncpfs\0" | |
dac70dc7 | 1504 | "ncp\0" |
a05f97b3 LP |
1505 | "nfs\0" |
1506 | "nfs4\0" | |
1507 | "gfs\0" | |
67608cad LP |
1508 | "gfs2\0" |
1509 | "glusterfs\0"; | |
1510 | ||
1511 | const char *x; | |
1512 | ||
1513 | x = startswith(fstype, "fuse."); | |
1514 | if (x) | |
1515 | fstype = x; | |
42856c10 | 1516 | |
a05f97b3 | 1517 | return nulstr_contains(table, fstype); |
42856c10 LP |
1518 | } |
1519 | ||
601f6a1e | 1520 | int chvt(int vt) { |
a05f97b3 | 1521 | _cleanup_close_ int fd; |
601f6a1e | 1522 | |
a05f97b3 LP |
1523 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1524 | if (fd < 0) | |
601f6a1e LP |
1525 | return -errno; |
1526 | ||
1527 | if (vt < 0) { | |
1528 | int tiocl[2] = { | |
1529 | TIOCL_GETKMSGREDIRECT, | |
1530 | 0 | |
1531 | }; | |
1532 | ||
a05f97b3 LP |
1533 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1534 | return -errno; | |
601f6a1e LP |
1535 | |
1536 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1537 | } | |
1538 | ||
1539 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1540 | return -errno; |
601f6a1e | 1541 | |
a05f97b3 | 1542 | return 0; |
601f6a1e LP |
1543 | } |
1544 | ||
8f2d43a0 | 1545 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
1546 | struct termios old_termios, new_termios; |
1547 | char c; | |
20c03b7b | 1548 | char line[LINE_MAX]; |
80876c20 LP |
1549 | |
1550 | assert(f); | |
1551 | assert(ret); | |
1552 | ||
1553 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1554 | new_termios = old_termios; | |
1555 | ||
1556 | new_termios.c_lflag &= ~ICANON; | |
1557 | new_termios.c_cc[VMIN] = 1; | |
1558 | new_termios.c_cc[VTIME] = 0; | |
1559 | ||
1560 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1561 | size_t k; | |
1562 | ||
8f2d43a0 LP |
1563 | if (t != (usec_t) -1) { |
1564 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
1565 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1566 | return -ETIMEDOUT; | |
1567 | } | |
1568 | } | |
1569 | ||
80876c20 LP |
1570 | k = fread(&c, 1, 1, f); |
1571 | ||
1572 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1573 | ||
1574 | if (k <= 0) | |
1575 | return -EIO; | |
1576 | ||
1577 | if (need_nl) | |
1578 | *need_nl = c != '\n'; | |
1579 | ||
1580 | *ret = c; | |
1581 | return 0; | |
1582 | } | |
1583 | } | |
1584 | ||
8f2d43a0 LP |
1585 | if (t != (usec_t) -1) |
1586 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
1587 | return -ETIMEDOUT; | |
1588 | ||
1589 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
1590 | return -EIO; |
1591 | ||
1592 | truncate_nl(line); | |
1593 | ||
1594 | if (strlen(line) != 1) | |
1595 | return -EBADMSG; | |
1596 | ||
1597 | if (need_nl) | |
1598 | *need_nl = false; | |
1599 | ||
1600 | *ret = line[0]; | |
1601 | return 0; | |
1602 | } | |
1603 | ||
1604 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 | 1605 | |
80876c20 LP |
1606 | assert(ret); |
1607 | assert(replies); | |
1608 | assert(text); | |
1609 | ||
1610 | for (;;) { | |
1611 | va_list ap; | |
1612 | char c; | |
1613 | int r; | |
1614 | bool need_nl = true; | |
1615 | ||
8481248b | 1616 | if (on_tty()) |
c1072ea0 | 1617 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1618 | |
80876c20 LP |
1619 | va_start(ap, text); |
1620 | vprintf(text, ap); | |
1621 | va_end(ap); | |
1622 | ||
8481248b | 1623 | if (on_tty()) |
c1072ea0 | 1624 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1625 | |
80876c20 LP |
1626 | fflush(stdout); |
1627 | ||
8f2d43a0 LP |
1628 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
1629 | if (r < 0) { | |
80876c20 LP |
1630 | |
1631 | if (r == -EBADMSG) { | |
1632 | puts("Bad input, please try again."); | |
1633 | continue; | |
1634 | } | |
1635 | ||
1636 | putchar('\n'); | |
1637 | return r; | |
1638 | } | |
1639 | ||
1640 | if (need_nl) | |
1641 | putchar('\n'); | |
1642 | ||
1643 | if (strchr(replies, c)) { | |
1644 | *ret = c; | |
1645 | return 0; | |
1646 | } | |
1647 | ||
1648 | puts("Read unexpected character, please try again."); | |
1649 | } | |
1650 | } | |
1651 | ||
512947d4 | 1652 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
1653 | struct termios termios; |
1654 | int r = 0; | |
3fe5e5d4 LP |
1655 | |
1656 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
1657 | |
1658 | assert(fd >= 0); | |
1659 | ||
eed1d0e3 LP |
1660 | /* We leave locked terminal attributes untouched, so that |
1661 | * Plymouth may set whatever it wants to set, and we don't | |
1662 | * interfere with that. */ | |
3fe5e5d4 LP |
1663 | |
1664 | /* Disable exclusive mode, just in case */ | |
1665 | ioctl(fd, TIOCNXCL); | |
1666 | ||
5c0100a5 | 1667 | /* Switch to text mode */ |
512947d4 MS |
1668 | if (switch_to_text) |
1669 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 1670 | |
3fe5e5d4 | 1671 | /* Enable console unicode mode */ |
df465b3f | 1672 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
1673 | |
1674 | if (tcgetattr(fd, &termios) < 0) { | |
1675 | r = -errno; | |
1676 | goto finish; | |
1677 | } | |
1678 | ||
aaf694ca LP |
1679 | /* We only reset the stuff that matters to the software. How |
1680 | * hardware is set up we don't touch assuming that somebody | |
1681 | * else will do that for us */ | |
1682 | ||
1683 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
1684 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
1685 | termios.c_oflag |= ONLCR; | |
1686 | termios.c_cflag |= CREAD; | |
1687 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
1688 | ||
1689 | termios.c_cc[VINTR] = 03; /* ^C */ | |
1690 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
1691 | termios.c_cc[VERASE] = 0177; | |
1692 | termios.c_cc[VKILL] = 025; /* ^X */ | |
1693 | termios.c_cc[VEOF] = 04; /* ^D */ | |
1694 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
1695 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
1696 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
1697 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
1698 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
1699 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
1700 | termios.c_cc[VEOL] = 0; |
1701 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
1702 | |
1703 | termios.c_cc[VTIME] = 0; | |
1704 | termios.c_cc[VMIN] = 1; | |
1705 | ||
1706 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
1707 | r = -errno; | |
1708 | ||
1709 | finish: | |
1710 | /* Just in case, flush all crap out */ | |
1711 | tcflush(fd, TCIOFLUSH); | |
1712 | ||
1713 | return r; | |
1714 | } | |
1715 | ||
6ea832a2 | 1716 | int reset_terminal(const char *name) { |
03e334a1 | 1717 | _cleanup_close_ int fd = -1; |
6ea832a2 LP |
1718 | |
1719 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
1720 | if (fd < 0) | |
1721 | return fd; | |
1722 | ||
03e334a1 | 1723 | return reset_terminal_fd(fd, true); |
6ea832a2 LP |
1724 | } |
1725 | ||
80876c20 LP |
1726 | int open_terminal(const char *name, int mode) { |
1727 | int fd, r; | |
f73f76ac | 1728 | unsigned c = 0; |
80876c20 | 1729 | |
f73f76ac LP |
1730 | /* |
1731 | * If a TTY is in the process of being closed opening it might | |
1732 | * cause EIO. This is horribly awful, but unlikely to be | |
1733 | * changed in the kernel. Hence we work around this problem by | |
1734 | * retrying a couple of times. | |
1735 | * | |
1736 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
1737 | */ | |
1738 | ||
dd94c17e LP |
1739 | assert(!(mode & O_CREAT)); |
1740 | ||
f73f76ac | 1741 | for (;;) { |
dd94c17e | 1742 | fd = open(name, mode, 0); |
af6da548 | 1743 | if (fd >= 0) |
f73f76ac LP |
1744 | break; |
1745 | ||
1746 | if (errno != EIO) | |
1747 | return -errno; | |
1748 | ||
af6da548 | 1749 | /* Max 1s in total */ |
f73f76ac LP |
1750 | if (c >= 20) |
1751 | return -errno; | |
1752 | ||
1753 | usleep(50 * USEC_PER_MSEC); | |
1754 | c++; | |
1755 | } | |
1756 | ||
1757 | if (fd < 0) | |
80876c20 LP |
1758 | return -errno; |
1759 | ||
af6da548 LP |
1760 | r = isatty(fd); |
1761 | if (r < 0) { | |
03e334a1 | 1762 | safe_close(fd); |
80876c20 LP |
1763 | return -errno; |
1764 | } | |
1765 | ||
1766 | if (!r) { | |
03e334a1 | 1767 | safe_close(fd); |
80876c20 LP |
1768 | return -ENOTTY; |
1769 | } | |
1770 | ||
1771 | return fd; | |
1772 | } | |
1773 | ||
1774 | int flush_fd(int fd) { | |
b92bea5d ZJS |
1775 | struct pollfd pollfd = { |
1776 | .fd = fd, | |
1777 | .events = POLLIN, | |
1778 | }; | |
80876c20 LP |
1779 | |
1780 | for (;;) { | |
20c03b7b | 1781 | char buf[LINE_MAX]; |
80876c20 LP |
1782 | ssize_t l; |
1783 | int r; | |
1784 | ||
e62d8c39 ZJS |
1785 | r = poll(&pollfd, 1, 0); |
1786 | if (r < 0) { | |
80876c20 LP |
1787 | if (errno == EINTR) |
1788 | continue; | |
1789 | ||
1790 | return -errno; | |
80876c20 | 1791 | |
e62d8c39 | 1792 | } else if (r == 0) |
80876c20 LP |
1793 | return 0; |
1794 | ||
e62d8c39 ZJS |
1795 | l = read(fd, buf, sizeof(buf)); |
1796 | if (l < 0) { | |
80876c20 LP |
1797 | |
1798 | if (errno == EINTR) | |
1799 | continue; | |
1800 | ||
1801 | if (errno == EAGAIN) | |
1802 | return 0; | |
1803 | ||
1804 | return -errno; | |
e62d8c39 | 1805 | } else if (l == 0) |
80876c20 LP |
1806 | return 0; |
1807 | } | |
1808 | } | |
1809 | ||
af6da548 LP |
1810 | int acquire_terminal( |
1811 | const char *name, | |
1812 | bool fail, | |
1813 | bool force, | |
1814 | bool ignore_tiocstty_eperm, | |
1815 | usec_t timeout) { | |
1816 | ||
4a0ff478 | 1817 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 1818 | usec_t ts = 0; |
80876c20 LP |
1819 | |
1820 | assert(name); | |
1821 | ||
1822 | /* We use inotify to be notified when the tty is closed. We | |
1823 | * create the watch before checking if we can actually acquire | |
1824 | * it, so that we don't lose any event. | |
1825 | * | |
1826 | * Note: strictly speaking this actually watches for the | |
1827 | * device being closed, it does *not* really watch whether a | |
1828 | * tty loses its controlling process. However, unless some | |
1829 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
1830 | * its tty otherwise this will not become a problem. As long | |
1831 | * as the administrator makes sure not configure any service | |
1832 | * on the same tty as an untrusted user this should not be a | |
1833 | * problem. (Which he probably should not do anyway.) */ | |
1834 | ||
af6da548 LP |
1835 | if (timeout != (usec_t) -1) |
1836 | ts = now(CLOCK_MONOTONIC); | |
1837 | ||
80876c20 | 1838 | if (!fail && !force) { |
af6da548 LP |
1839 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
1840 | if (notify < 0) { | |
80876c20 LP |
1841 | r = -errno; |
1842 | goto fail; | |
1843 | } | |
1844 | ||
af6da548 LP |
1845 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
1846 | if (wd < 0) { | |
80876c20 LP |
1847 | r = -errno; |
1848 | goto fail; | |
1849 | } | |
1850 | } | |
1851 | ||
1852 | for (;;) { | |
b92bea5d ZJS |
1853 | struct sigaction sa_old, sa_new = { |
1854 | .sa_handler = SIG_IGN, | |
1855 | .sa_flags = SA_RESTART, | |
1856 | }; | |
1857 | ||
af6da548 LP |
1858 | if (notify >= 0) { |
1859 | r = flush_fd(notify); | |
1860 | if (r < 0) | |
e3d1855b | 1861 | goto fail; |
af6da548 | 1862 | } |
80876c20 LP |
1863 | |
1864 | /* We pass here O_NOCTTY only so that we can check the return | |
1865 | * value TIOCSCTTY and have a reliable way to figure out if we | |
1866 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
1867 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
1868 | if (fd < 0) | |
6ea832a2 | 1869 | return fd; |
80876c20 | 1870 | |
32c4bef8 LP |
1871 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1872 | * if we already own the tty. */ | |
32c4bef8 LP |
1873 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
1874 | ||
80876c20 | 1875 | /* First, try to get the tty */ |
32c4bef8 LP |
1876 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
1877 | r = -errno; | |
1878 | ||
1879 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
1880 | |
1881 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
1882 | * returning EPERM, i.e. when very likely we already | |
1883 | * are have this controlling terminal. */ | |
32c4bef8 | 1884 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
1885 | r = 0; |
1886 | ||
32c4bef8 | 1887 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
1888 | goto fail; |
1889 | } | |
1890 | ||
1891 | if (r >= 0) | |
1892 | break; | |
1893 | ||
1894 | assert(!fail); | |
1895 | assert(!force); | |
1896 | assert(notify >= 0); | |
1897 | ||
1898 | for (;;) { | |
f601daa7 | 1899 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 1900 | ssize_t l; |
f601daa7 | 1901 | struct inotify_event *e; |
80876c20 | 1902 | |
af6da548 LP |
1903 | if (timeout != (usec_t) -1) { |
1904 | usec_t n; | |
1905 | ||
1906 | n = now(CLOCK_MONOTONIC); | |
1907 | if (ts + timeout < n) { | |
1908 | r = -ETIMEDOUT; | |
1909 | goto fail; | |
1910 | } | |
1911 | ||
1912 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
1913 | if (r < 0) | |
1914 | goto fail; | |
1915 | ||
1916 | if (r == 0) { | |
1917 | r = -ETIMEDOUT; | |
1918 | goto fail; | |
1919 | } | |
1920 | } | |
1921 | ||
1922 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
1923 | if (l < 0) { | |
80876c20 | 1924 | |
af6da548 | 1925 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
1926 | continue; |
1927 | ||
1928 | r = -errno; | |
1929 | goto fail; | |
1930 | } | |
1931 | ||
1932 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 1933 | |
f601daa7 LP |
1934 | while (l > 0) { |
1935 | size_t step; | |
80876c20 | 1936 | |
f601daa7 | 1937 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 1938 | r = -EIO; |
f601daa7 LP |
1939 | goto fail; |
1940 | } | |
80876c20 | 1941 | |
f601daa7 LP |
1942 | step = sizeof(struct inotify_event) + e->len; |
1943 | assert(step <= (size_t) l); | |
80876c20 | 1944 | |
f601daa7 LP |
1945 | e = (struct inotify_event*) ((uint8_t*) e + step); |
1946 | l -= step; | |
80876c20 LP |
1947 | } |
1948 | ||
1949 | break; | |
1950 | } | |
1951 | ||
1952 | /* We close the tty fd here since if the old session | |
1953 | * ended our handle will be dead. It's important that | |
1954 | * we do this after sleeping, so that we don't enter | |
1955 | * an endless loop. */ | |
03e334a1 | 1956 | safe_close(fd); |
80876c20 LP |
1957 | } |
1958 | ||
03e334a1 | 1959 | safe_close(notify); |
80876c20 | 1960 | |
512947d4 MS |
1961 | r = reset_terminal_fd(fd, true); |
1962 | if (r < 0) | |
80876c20 LP |
1963 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
1964 | ||
1965 | return fd; | |
1966 | ||
1967 | fail: | |
03e334a1 LP |
1968 | safe_close(fd); |
1969 | safe_close(notify); | |
80876c20 LP |
1970 | |
1971 | return r; | |
1972 | } | |
1973 | ||
1974 | int release_terminal(void) { | |
e62d8c39 | 1975 | int r = 0; |
b92bea5d ZJS |
1976 | struct sigaction sa_old, sa_new = { |
1977 | .sa_handler = SIG_IGN, | |
1978 | .sa_flags = SA_RESTART, | |
1979 | }; | |
7fd1b19b | 1980 | _cleanup_close_ int fd; |
80876c20 | 1981 | |
e62d8c39 ZJS |
1982 | fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC); |
1983 | if (fd < 0) | |
80876c20 LP |
1984 | return -errno; |
1985 | ||
57cd2192 LP |
1986 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1987 | * by our own TIOCNOTTY */ | |
57cd2192 LP |
1988 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
1989 | ||
80876c20 LP |
1990 | if (ioctl(fd, TIOCNOTTY) < 0) |
1991 | r = -errno; | |
1992 | ||
57cd2192 LP |
1993 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
1994 | ||
80876c20 LP |
1995 | return r; |
1996 | } | |
1997 | ||
9a34ec5f LP |
1998 | int sigaction_many(const struct sigaction *sa, ...) { |
1999 | va_list ap; | |
2000 | int r = 0, sig; | |
2001 | ||
2002 | va_start(ap, sa); | |
2003 | while ((sig = va_arg(ap, int)) > 0) | |
2004 | if (sigaction(sig, sa, NULL) < 0) | |
2005 | r = -errno; | |
2006 | va_end(ap); | |
2007 | ||
2008 | return r; | |
2009 | } | |
2010 | ||
2011 | int ignore_signals(int sig, ...) { | |
b92bea5d ZJS |
2012 | struct sigaction sa = { |
2013 | .sa_handler = SIG_IGN, | |
2014 | .sa_flags = SA_RESTART, | |
2015 | }; | |
9a34ec5f LP |
2016 | va_list ap; |
2017 | int r = 0; | |
a337c6fc | 2018 | |
9a34ec5f LP |
2019 | if (sigaction(sig, &sa, NULL) < 0) |
2020 | r = -errno; | |
2021 | ||
2022 | va_start(ap, sig); | |
2023 | while ((sig = va_arg(ap, int)) > 0) | |
2024 | if (sigaction(sig, &sa, NULL) < 0) | |
2025 | r = -errno; | |
2026 | va_end(ap); | |
2027 | ||
2028 | return r; | |
2029 | } | |
2030 | ||
2031 | int default_signals(int sig, ...) { | |
b92bea5d ZJS |
2032 | struct sigaction sa = { |
2033 | .sa_handler = SIG_DFL, | |
2034 | .sa_flags = SA_RESTART, | |
2035 | }; | |
9a34ec5f LP |
2036 | va_list ap; |
2037 | int r = 0; | |
2038 | ||
9a34ec5f LP |
2039 | if (sigaction(sig, &sa, NULL) < 0) |
2040 | r = -errno; | |
2041 | ||
2042 | va_start(ap, sig); | |
2043 | while ((sig = va_arg(ap, int)) > 0) | |
2044 | if (sigaction(sig, &sa, NULL) < 0) | |
2045 | r = -errno; | |
2046 | va_end(ap); | |
2047 | ||
2048 | return r; | |
a337c6fc LP |
2049 | } |
2050 | ||
3d94f76c | 2051 | void safe_close_pair(int p[]) { |
8d567588 LP |
2052 | assert(p); |
2053 | ||
3d94f76c LP |
2054 | if (p[0] == p[1]) { |
2055 | /* Special case pairs which use the same fd in both | |
2056 | * directions... */ | |
2057 | p[0] = p[1] = safe_close(p[0]); | |
2058 | return; | |
8d567588 LP |
2059 | } |
2060 | ||
3d94f76c LP |
2061 | p[0] = safe_close(p[0]); |
2062 | p[1] = safe_close(p[1]); | |
8d567588 LP |
2063 | } |
2064 | ||
eb22ac37 | 2065 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2066 | uint8_t *p = buf; |
8d567588 LP |
2067 | ssize_t n = 0; |
2068 | ||
2069 | assert(fd >= 0); | |
2070 | assert(buf); | |
2071 | ||
8d567588 LP |
2072 | while (nbytes > 0) { |
2073 | ssize_t k; | |
2074 | ||
7d5dd5e0 LP |
2075 | k = read(fd, p, nbytes); |
2076 | if (k < 0 && errno == EINTR) | |
2077 | continue; | |
8d567588 | 2078 | |
7d5dd5e0 | 2079 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 | 2080 | |
7d5dd5e0 LP |
2081 | /* We knowingly ignore any return value here, |
2082 | * and expect that any error/EOF is reported | |
2083 | * via read() */ | |
8d567588 | 2084 | |
7d5dd5e0 LP |
2085 | fd_wait_for_event(fd, POLLIN, (usec_t) -1); |
2086 | continue; | |
2087 | } | |
8d567588 | 2088 | |
7d5dd5e0 | 2089 | if (k <= 0) |
8d567588 | 2090 | return n > 0 ? n : (k < 0 ? -errno : 0); |
8d567588 LP |
2091 | |
2092 | p += k; | |
2093 | nbytes -= k; | |
2094 | n += k; | |
2095 | } | |
2096 | ||
2097 | return n; | |
2098 | } | |
2099 | ||
eb22ac37 | 2100 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2101 | const uint8_t *p = buf; |
eb22ac37 LP |
2102 | ssize_t n = 0; |
2103 | ||
2104 | assert(fd >= 0); | |
2105 | assert(buf); | |
2106 | ||
eb22ac37 LP |
2107 | while (nbytes > 0) { |
2108 | ssize_t k; | |
2109 | ||
fe652127 | 2110 | k = write(fd, p, nbytes); |
7d5dd5e0 LP |
2111 | if (k < 0 && errno == EINTR) |
2112 | continue; | |
eb22ac37 | 2113 | |
7d5dd5e0 | 2114 | if (k < 0 && errno == EAGAIN && do_poll) { |
eb22ac37 | 2115 | |
7d5dd5e0 LP |
2116 | /* We knowingly ignore any return value here, |
2117 | * and expect that any error/EOF is reported | |
2118 | * via write() */ | |
eb22ac37 | 2119 | |
7d5dd5e0 LP |
2120 | fd_wait_for_event(fd, POLLOUT, (usec_t) -1); |
2121 | continue; | |
2122 | } | |
eb22ac37 | 2123 | |
7d5dd5e0 | 2124 | if (k <= 0) |
eb22ac37 | 2125 | return n > 0 ? n : (k < 0 ? -errno : 0); |
eb22ac37 LP |
2126 | |
2127 | p += k; | |
2128 | nbytes -= k; | |
2129 | n += k; | |
2130 | } | |
2131 | ||
2132 | return n; | |
2133 | } | |
2134 | ||
5556b5fe LP |
2135 | int parse_size(const char *t, off_t base, off_t *size) { |
2136 | ||
2137 | /* Soo, sometimes we want to parse IEC binary suffxies, and | |
2138 | * sometimes SI decimal suffixes. This function can parse | |
2139 | * both. Which one is the right way depends on the | |
2140 | * context. Wikipedia suggests that SI is customary for | |
2141 | * hardrware metrics and network speeds, while IEC is | |
2142 | * customary for most data sizes used by software and volatile | |
2143 | * (RAM) memory. Hence be careful which one you pick! | |
2144 | * | |
2145 | * In either case we use just K, M, G as suffix, and not Ki, | |
2146 | * Mi, Gi or so (as IEC would suggest). That's because that's | |
2147 | * frickin' ugly. But this means you really need to make sure | |
2148 | * to document which base you are parsing when you use this | |
2149 | * call. */ | |
2150 | ||
2151 | struct table { | |
ab1f0633 | 2152 | const char *suffix; |
b32ff512 | 2153 | unsigned long long factor; |
5556b5fe LP |
2154 | }; |
2155 | ||
2156 | static const struct table iec[] = { | |
32895bb3 | 2157 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
840292be ZJS |
2158 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2159 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
2160 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2161 | { "M", 1024ULL*1024ULL }, | |
2162 | { "K", 1024ULL }, | |
2163 | { "B", 1 }, | |
ab1f0633 LP |
2164 | { "", 1 }, |
2165 | }; | |
2166 | ||
5556b5fe | 2167 | static const struct table si[] = { |
5556b5fe | 2168 | { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
840292be ZJS |
2169 | { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
2170 | { "T", 1000ULL*1000ULL*1000ULL*1000ULL }, | |
2171 | { "G", 1000ULL*1000ULL*1000ULL }, | |
2172 | { "M", 1000ULL*1000ULL }, | |
2173 | { "K", 1000ULL }, | |
2174 | { "B", 1 }, | |
5556b5fe LP |
2175 | { "", 1 }, |
2176 | }; | |
2177 | ||
2178 | const struct table *table; | |
ab1f0633 | 2179 | const char *p; |
b32ff512 | 2180 | unsigned long long r = 0; |
840292be | 2181 | unsigned n_entries, start_pos = 0; |
ab1f0633 LP |
2182 | |
2183 | assert(t); | |
5556b5fe LP |
2184 | assert(base == 1000 || base == 1024); |
2185 | assert(size); | |
2186 | ||
2187 | if (base == 1000) { | |
2188 | table = si; | |
2189 | n_entries = ELEMENTSOF(si); | |
2190 | } else { | |
2191 | table = iec; | |
2192 | n_entries = ELEMENTSOF(iec); | |
2193 | } | |
ab1f0633 LP |
2194 | |
2195 | p = t; | |
2196 | do { | |
2197 | long long l; | |
9480794b ZJS |
2198 | unsigned long long l2; |
2199 | double frac = 0; | |
ab1f0633 LP |
2200 | char *e; |
2201 | unsigned i; | |
2202 | ||
2203 | errno = 0; | |
2204 | l = strtoll(p, &e, 10); | |
2205 | ||
8333c77e | 2206 | if (errno > 0) |
ab1f0633 LP |
2207 | return -errno; |
2208 | ||
2209 | if (l < 0) | |
2210 | return -ERANGE; | |
2211 | ||
2212 | if (e == p) | |
2213 | return -EINVAL; | |
2214 | ||
9480794b ZJS |
2215 | if (*e == '.') { |
2216 | e++; | |
2217 | if (*e >= '0' && *e <= '9') { | |
2218 | char *e2; | |
2219 | ||
2220 | /* strotoull itself would accept space/+/- */ | |
2221 | l2 = strtoull(e, &e2, 10); | |
2222 | ||
2223 | if (errno == ERANGE) | |
2224 | return -errno; | |
2225 | ||
2226 | /* Ignore failure. E.g. 10.M is valid */ | |
2227 | frac = l2; | |
2228 | for (; e < e2; e++) | |
2229 | frac /= 10; | |
2230 | } | |
2231 | } | |
2232 | ||
ab1f0633 LP |
2233 | e += strspn(e, WHITESPACE); |
2234 | ||
840292be | 2235 | for (i = start_pos; i < n_entries; i++) |
ab1f0633 | 2236 | if (startswith(e, table[i].suffix)) { |
b32ff512 | 2237 | unsigned long long tmp; |
9480794b | 2238 | if ((unsigned long long) l + (frac > 0) > ULLONG_MAX / table[i].factor) |
b32ff512 | 2239 | return -ERANGE; |
9480794b | 2240 | tmp = l * table[i].factor + (unsigned long long) (frac * table[i].factor); |
b32ff512 ZJS |
2241 | if (tmp > ULLONG_MAX - r) |
2242 | return -ERANGE; | |
2243 | ||
2244 | r += tmp; | |
2245 | if ((unsigned long long) (off_t) r != r) | |
2246 | return -ERANGE; | |
2247 | ||
ab1f0633 | 2248 | p = e + strlen(table[i].suffix); |
840292be ZJS |
2249 | |
2250 | start_pos = i + 1; | |
ab1f0633 LP |
2251 | break; |
2252 | } | |
2253 | ||
5556b5fe | 2254 | if (i >= n_entries) |
ab1f0633 LP |
2255 | return -EINVAL; |
2256 | ||
b32ff512 | 2257 | } while (*p); |
ab1f0633 | 2258 | |
5556b5fe | 2259 | *size = r; |
ab1f0633 LP |
2260 | |
2261 | return 0; | |
2262 | } | |
2263 | ||
843d2643 LP |
2264 | int make_stdio(int fd) { |
2265 | int r, s, t; | |
2266 | ||
2267 | assert(fd >= 0); | |
2268 | ||
73836c5c LP |
2269 | r = dup3(fd, STDIN_FILENO, 0); |
2270 | s = dup3(fd, STDOUT_FILENO, 0); | |
2271 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2272 | |
2273 | if (fd >= 3) | |
03e334a1 | 2274 | safe_close(fd); |
843d2643 LP |
2275 | |
2276 | if (r < 0 || s < 0 || t < 0) | |
2277 | return -errno; | |
2278 | ||
73836c5c | 2279 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2280 | |
843d2643 LP |
2281 | return 0; |
2282 | } | |
2283 | ||
ade509ce LP |
2284 | int make_null_stdio(void) { |
2285 | int null_fd; | |
2286 | ||
cd3bd60a LP |
2287 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2288 | if (null_fd < 0) | |
ade509ce LP |
2289 | return -errno; |
2290 | ||
2291 | return make_stdio(null_fd); | |
2292 | } | |
2293 | ||
8407a5d0 LP |
2294 | bool is_device_path(const char *path) { |
2295 | ||
2296 | /* Returns true on paths that refer to a device, either in | |
2297 | * sysfs or in /dev */ | |
2298 | ||
2299 | return | |
2300 | path_startswith(path, "/dev/") || | |
2301 | path_startswith(path, "/sys/"); | |
2302 | } | |
2303 | ||
01f78473 | 2304 | int dir_is_empty(const char *path) { |
a05f97b3 | 2305 | _cleanup_closedir_ DIR *d; |
01f78473 | 2306 | |
a05f97b3 LP |
2307 | d = opendir(path); |
2308 | if (!d) | |
01f78473 LP |
2309 | return -errno; |
2310 | ||
2311 | for (;;) { | |
7d5e9c0f | 2312 | struct dirent *de; |
01f78473 | 2313 | |
3fd11280 FW |
2314 | errno = 0; |
2315 | de = readdir(d); | |
2316 | if (!de && errno != 0) | |
2317 | return -errno; | |
01f78473 | 2318 | |
a05f97b3 LP |
2319 | if (!de) |
2320 | return 1; | |
01f78473 | 2321 | |
a05f97b3 LP |
2322 | if (!ignore_file(de->d_name)) |
2323 | return 0; | |
2324 | } | |
01f78473 LP |
2325 | } |
2326 | ||
844ec79b ZJS |
2327 | char* dirname_malloc(const char *path) { |
2328 | char *d, *dir, *dir2; | |
2329 | ||
2330 | d = strdup(path); | |
2331 | if (!d) | |
2332 | return NULL; | |
2333 | dir = dirname(d); | |
2334 | assert(dir); | |
2335 | ||
2336 | if (dir != d) { | |
2337 | dir2 = strdup(dir); | |
2338 | free(d); | |
2339 | return dir2; | |
2340 | } | |
2341 | ||
2342 | return dir; | |
2343 | } | |
2344 | ||
b89446bb | 2345 | int dev_urandom(void *p, size_t n) { |
a05f97b3 | 2346 | _cleanup_close_ int fd; |
9bf3b535 | 2347 | ssize_t k; |
d3782d60 | 2348 | |
ac0930c8 LP |
2349 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2350 | if (fd < 0) | |
b89446bb | 2351 | return errno == ENOENT ? -ENOSYS : -errno; |
d3782d60 | 2352 | |
9bf3b535 | 2353 | k = loop_read(fd, p, n, true); |
b89446bb LP |
2354 | if (k < 0) |
2355 | return (int) k; | |
2356 | if ((size_t) k != n) | |
2357 | return -EIO; | |
2358 | ||
2359 | return 0; | |
2360 | } | |
2361 | ||
2362 | void random_bytes(void *p, size_t n) { | |
2363 | static bool srand_called = false; | |
2364 | uint8_t *q; | |
2365 | int r; | |
d3782d60 | 2366 | |
b89446bb LP |
2367 | r = dev_urandom(p, n); |
2368 | if (r >= 0) | |
2369 | return; | |
d3782d60 | 2370 | |
b89446bb LP |
2371 | /* If some idiot made /dev/urandom unavailable to us, he'll |
2372 | * get a PRNG instead. */ | |
d3782d60 | 2373 | |
9bf3b535 | 2374 | if (!srand_called) { |
b89446bb | 2375 | unsigned x = 0; |
a3b6fafe | 2376 | |
9bf3b535 LP |
2377 | #ifdef HAVE_SYS_AUXV_H |
2378 | /* The kernel provides us with a bit of entropy in | |
2379 | * auxv, so let's try to make use of that to seed the | |
2380 | * pseudo-random generator. It's better than | |
2381 | * nothing... */ | |
a3b6fafe | 2382 | |
9bf3b535 LP |
2383 | void *auxv; |
2384 | ||
2385 | auxv = (void*) getauxval(AT_RANDOM); | |
2386 | if (auxv) | |
b89446bb | 2387 | x ^= *(unsigned*) auxv; |
9bf3b535 | 2388 | #endif |
a3b6fafe | 2389 | |
b89446bb LP |
2390 | x ^= (unsigned) now(CLOCK_REALTIME); |
2391 | x ^= (unsigned) gettid(); | |
2392 | ||
2393 | srand(x); | |
9bf3b535 LP |
2394 | srand_called = true; |
2395 | } | |
a3b6fafe | 2396 | |
9bf3b535 LP |
2397 | for (q = p; q < (uint8_t*) p + n; q ++) |
2398 | *q = rand(); | |
a3b6fafe LP |
2399 | } |
2400 | ||
5b6319dc LP |
2401 | void rename_process(const char name[8]) { |
2402 | assert(name); | |
2403 | ||
5d6b1584 LP |
2404 | /* This is a like a poor man's setproctitle(). It changes the |
2405 | * comm field, argv[0], and also the glibc's internally used | |
2406 | * name of the process. For the first one a limit of 16 chars | |
2407 | * applies, to the second one usually one of 10 (i.e. length | |
2408 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2409 | * "systemd"). If you pass a longer string it will be | |
2410 | * truncated */ | |
5b6319dc | 2411 | |
5d6b1584 | 2412 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2413 | |
2414 | if (program_invocation_name) | |
2415 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2416 | |
2417 | if (saved_argc > 0) { | |
2418 | int i; | |
2419 | ||
2420 | if (saved_argv[0]) | |
2421 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2422 | ||
2423 | for (i = 1; i < saved_argc; i++) { | |
2424 | if (!saved_argv[i]) | |
2425 | break; | |
2426 | ||
29804cc1 | 2427 | memzero(saved_argv[i], strlen(saved_argv[i])); |
9a0e6896 LP |
2428 | } |
2429 | } | |
5b6319dc LP |
2430 | } |
2431 | ||
7d793605 LP |
2432 | void sigset_add_many(sigset_t *ss, ...) { |
2433 | va_list ap; | |
2434 | int sig; | |
2435 | ||
2436 | assert(ss); | |
2437 | ||
2438 | va_start(ap, ss); | |
2439 | while ((sig = va_arg(ap, int)) > 0) | |
2440 | assert_se(sigaddset(ss, sig) == 0); | |
2441 | va_end(ap); | |
2442 | } | |
2443 | ||
856a5a7d LP |
2444 | int sigprocmask_many(int how, ...) { |
2445 | va_list ap; | |
2446 | sigset_t ss; | |
2447 | int sig; | |
2448 | ||
2449 | assert_se(sigemptyset(&ss) == 0); | |
2450 | ||
2451 | va_start(ap, how); | |
2452 | while ((sig = va_arg(ap, int)) > 0) | |
2453 | assert_se(sigaddset(&ss, sig) == 0); | |
2454 | va_end(ap); | |
2455 | ||
2456 | if (sigprocmask(how, &ss, NULL) < 0) | |
2457 | return -errno; | |
2458 | ||
2459 | return 0; | |
2460 | } | |
2461 | ||
ef2f1067 LP |
2462 | char* gethostname_malloc(void) { |
2463 | struct utsname u; | |
2464 | ||
2465 | assert_se(uname(&u) >= 0); | |
2466 | ||
344de609 | 2467 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2468 | return strdup(u.nodename); |
2469 | ||
2470 | return strdup(u.sysname); | |
2471 | } | |
2472 | ||
344de609 LP |
2473 | bool hostname_is_set(void) { |
2474 | struct utsname u; | |
2475 | ||
2476 | assert_se(uname(&u) >= 0); | |
2477 | ||
2478 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2479 | } | |
2480 | ||
7c5f152a | 2481 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2482 | long bufsize; |
a05f97b3 LP |
2483 | char *name; |
2484 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2485 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2486 | |
2487 | /* Shortcut things to avoid NSS lookups */ | |
2488 | if (uid == 0) | |
2489 | return strdup("root"); | |
2490 | ||
7c5f152a LP |
2491 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2492 | if (bufsize <= 0) | |
ef2f1067 LP |
2493 | bufsize = 4096; |
2494 | ||
7c5f152a LP |
2495 | buf = malloc(bufsize); |
2496 | if (!buf) | |
ef2f1067 LP |
2497 | return NULL; |
2498 | ||
a05f97b3 LP |
2499 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2500 | return strdup(pw->pw_name); | |
ef2f1067 | 2501 | |
de0671ee | 2502 | if (asprintf(&name, UID_FMT, uid) < 0) |
ef2f1067 LP |
2503 | return NULL; |
2504 | ||
2505 | return name; | |
2506 | } | |
2507 | ||
7c5f152a LP |
2508 | char* getlogname_malloc(void) { |
2509 | uid_t uid; | |
2510 | struct stat st; | |
2511 | ||
2512 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2513 | uid = st.st_uid; | |
2514 | else | |
2515 | uid = getuid(); | |
2516 | ||
2517 | return lookup_uid(uid); | |
2518 | } | |
2519 | ||
2520 | char *getusername_malloc(void) { | |
2521 | const char *e; | |
2522 | ||
2523 | e = getenv("USER"); | |
2524 | if (e) | |
2525 | return strdup(e); | |
2526 | ||
2527 | return lookup_uid(getuid()); | |
2528 | } | |
2529 | ||
fc116c6a LP |
2530 | int getttyname_malloc(int fd, char **r) { |
2531 | char path[PATH_MAX], *c; | |
618e02c7 | 2532 | int k; |
8c6db833 LP |
2533 | |
2534 | assert(r); | |
ef2f1067 | 2535 | |
a05f97b3 | 2536 | k = ttyname_r(fd, path, sizeof(path)); |
27373e44 | 2537 | if (k > 0) |
618e02c7 | 2538 | return -k; |
ef2f1067 LP |
2539 | |
2540 | char_array_0(path); | |
2541 | ||
a05f97b3 LP |
2542 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2543 | if (!c) | |
8c6db833 LP |
2544 | return -ENOMEM; |
2545 | ||
2546 | *r = c; | |
2547 | return 0; | |
2548 | } | |
2549 | ||
fc116c6a LP |
2550 | int getttyname_harder(int fd, char **r) { |
2551 | int k; | |
2552 | char *s; | |
2553 | ||
a05f97b3 LP |
2554 | k = getttyname_malloc(fd, &s); |
2555 | if (k < 0) | |
fc116c6a LP |
2556 | return k; |
2557 | ||
2558 | if (streq(s, "tty")) { | |
2559 | free(s); | |
4d6d6518 | 2560 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2561 | } |
2562 | ||
2563 | *r = s; | |
2564 | return 0; | |
2565 | } | |
2566 | ||
4d6d6518 | 2567 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
b4696bce SP |
2568 | int r; |
2569 | _cleanup_free_ char *line = NULL; | |
2570 | const char *p; | |
fc116c6a | 2571 | unsigned long ttynr; |
fc116c6a | 2572 | |
49aa47c7 | 2573 | assert(pid >= 0); |
49aa47c7 | 2574 | |
b4696bce SP |
2575 | p = procfs_file_alloca(pid, "stat"); |
2576 | r = read_one_line_file(p, &line); | |
2577 | if (r < 0) | |
2578 | return r; | |
fc116c6a | 2579 | |
4d6d6518 LP |
2580 | p = strrchr(line, ')'); |
2581 | if (!p) | |
fc116c6a LP |
2582 | return -EIO; |
2583 | ||
2584 | p++; | |
2585 | ||
2586 | if (sscanf(p, " " | |
2587 | "%*c " /* state */ | |
2588 | "%*d " /* ppid */ | |
2589 | "%*d " /* pgrp */ | |
2590 | "%*d " /* session */ | |
2591 | "%lu ", /* ttynr */ | |
2592 | &ttynr) != 1) | |
2593 | return -EIO; | |
2594 | ||
11dc5d2b LP |
2595 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2596 | return -ENOENT; | |
2597 | ||
0bee65f0 LP |
2598 | if (d) |
2599 | *d = (dev_t) ttynr; | |
2600 | ||
fc116c6a LP |
2601 | return 0; |
2602 | } | |
2603 | ||
4d6d6518 | 2604 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
833fce28 LP |
2605 | char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *b = NULL; |
2606 | _cleanup_free_ char *s = NULL; | |
2607 | const char *p; | |
fc116c6a | 2608 | dev_t devnr; |
833fce28 | 2609 | int k; |
fc116c6a LP |
2610 | |
2611 | assert(r); | |
2612 | ||
4d6d6518 LP |
2613 | k = get_ctty_devnr(pid, &devnr); |
2614 | if (k < 0) | |
fc116c6a LP |
2615 | return k; |
2616 | ||
2617 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
fc116c6a | 2618 | |
23406ce5 LP |
2619 | k = readlink_malloc(fn, &s); |
2620 | if (k < 0) { | |
fc116c6a LP |
2621 | |
2622 | if (k != -ENOENT) | |
2623 | return k; | |
2624 | ||
46824d0e LP |
2625 | /* This is an ugly hack */ |
2626 | if (major(devnr) == 136) { | |
de0671ee | 2627 | asprintf(&b, "pts/%u", minor(devnr)); |
833fce28 | 2628 | goto finish; |
46824d0e LP |
2629 | } |
2630 | ||
fc116c6a LP |
2631 | /* Probably something like the ptys which have no |
2632 | * symlink in /dev/char. Let's return something | |
2633 | * vaguely useful. */ | |
2634 | ||
23406ce5 | 2635 | b = strdup(fn + 5); |
833fce28 | 2636 | goto finish; |
fc116c6a LP |
2637 | } |
2638 | ||
2639 | if (startswith(s, "/dev/")) | |
2640 | p = s + 5; | |
2641 | else if (startswith(s, "../")) | |
2642 | p = s + 3; | |
2643 | else | |
2644 | p = s; | |
2645 | ||
2646 | b = strdup(p); | |
fc116c6a | 2647 | |
833fce28 | 2648 | finish: |
fc116c6a LP |
2649 | if (!b) |
2650 | return -ENOMEM; | |
2651 | ||
2652 | *r = b; | |
46824d0e LP |
2653 | if (_devnr) |
2654 | *_devnr = devnr; | |
2655 | ||
fc116c6a LP |
2656 | return 0; |
2657 | } | |
2658 | ||
f56d5db9 | 2659 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
2660 | DIR *d; |
2661 | int ret = 0; | |
2662 | ||
2663 | assert(fd >= 0); | |
2664 | ||
2665 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2666 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2667 | |
d4d046e3 LP |
2668 | d = fdopendir(fd); |
2669 | if (!d) { | |
03e334a1 | 2670 | safe_close(fd); |
4c633005 LP |
2671 | |
2672 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2673 | } |
2674 | ||
2675 | for (;;) { | |
7d5e9c0f | 2676 | struct dirent *de; |
7925c22a LP |
2677 | bool is_dir, keep_around; |
2678 | struct stat st; | |
8c6db833 LP |
2679 | int r; |
2680 | ||
3fd11280 FW |
2681 | errno = 0; |
2682 | de = readdir(d); | |
2683 | if (!de && errno != 0) { | |
2684 | if (ret == 0) | |
2685 | ret = -errno; | |
8c6db833 LP |
2686 | break; |
2687 | } | |
2688 | ||
2689 | if (!de) | |
2690 | break; | |
2691 | ||
2692 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
2693 | continue; | |
2694 | ||
7925c22a LP |
2695 | if (de->d_type == DT_UNKNOWN || |
2696 | honour_sticky || | |
2697 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2698 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2699 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2700 | ret = -errno; |
2701 | continue; | |
2702 | } | |
2703 | ||
2704 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2705 | keep_around = |
2706 | honour_sticky && | |
2707 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2708 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2709 | } else { |
8c6db833 | 2710 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2711 | keep_around = false; |
ad293f5a | 2712 | } |
8c6db833 LP |
2713 | |
2714 | if (is_dir) { | |
2715 | int subdir_fd; | |
8c6db833 | 2716 | |
597f43c7 | 2717 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
2718 | if (root_dev && st.st_dev != root_dev->st_dev) |
2719 | continue; | |
8c6db833 | 2720 | |
7925c22a LP |
2721 | subdir_fd = openat(fd, de->d_name, |
2722 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
2723 | if (subdir_fd < 0) { | |
2724 | if (ret == 0 && errno != ENOENT) | |
2725 | ret = -errno; | |
2726 | continue; | |
2727 | } | |
2728 | ||
b3d28469 | 2729 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
2730 | if (r < 0 && ret == 0) |
2731 | ret = r; | |
2732 | ||
2733 | if (!keep_around) | |
2734 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
2735 | if (ret == 0 && errno != ENOENT) |
2736 | ret = -errno; | |
2737 | } | |
2738 | ||
2739 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
2740 | |
2741 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 2742 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2743 | ret = -errno; |
2744 | } | |
2745 | } | |
2746 | } | |
2747 | ||
2748 | closedir(d); | |
2749 | ||
2750 | return ret; | |
2751 | } | |
2752 | ||
44a6b1b6 | 2753 | _pure_ static int is_temporary_fs(struct statfs *s) { |
943aad8c | 2754 | assert(s); |
73020ab2 SL |
2755 | |
2756 | return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) || | |
2757 | F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC); | |
943aad8c ZJS |
2758 | } |
2759 | ||
f56d5db9 LP |
2760 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
2761 | struct statfs s; | |
2762 | ||
2763 | assert(fd >= 0); | |
2764 | ||
2765 | if (fstatfs(fd, &s) < 0) { | |
03e334a1 | 2766 | safe_close(fd); |
f56d5db9 LP |
2767 | return -errno; |
2768 | } | |
2769 | ||
2770 | /* We refuse to clean disk file systems with this call. This | |
2771 | * is extra paranoia just to be sure we never ever remove | |
2772 | * non-state data */ | |
943aad8c | 2773 | if (!is_temporary_fs(&s)) { |
f56d5db9 | 2774 | log_error("Attempted to remove disk file system, and we can't allow that."); |
03e334a1 | 2775 | safe_close(fd); |
f56d5db9 LP |
2776 | return -EPERM; |
2777 | } | |
2778 | ||
2779 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
2780 | } | |
2781 | ||
2782 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
2783 | int fd, r; | |
2784 | struct statfs s; | |
8c6db833 LP |
2785 | |
2786 | assert(path); | |
2787 | ||
f56d5db9 LP |
2788 | /* We refuse to clean the root file system with this |
2789 | * call. This is extra paranoia to never cause a really | |
2790 | * seriously broken system. */ | |
2791 | if (path_equal(path, "/")) { | |
2792 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
2793 | return -EPERM; | |
2794 | } | |
461b1822 | 2795 | |
d4d046e3 LP |
2796 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
2797 | if (fd < 0) { | |
8c6db833 LP |
2798 | |
2799 | if (errno != ENOTDIR) | |
2800 | return -errno; | |
2801 | ||
f56d5db9 LP |
2802 | if (!dangerous) { |
2803 | if (statfs(path, &s) < 0) | |
2804 | return -errno; | |
2805 | ||
943aad8c | 2806 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2807 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2808 | return -EPERM; | |
2809 | } | |
2810 | } | |
2811 | ||
8c6db833 | 2812 | if (delete_root && !only_dirs) |
d4d046e3 | 2813 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
2814 | return -errno; |
2815 | ||
2816 | return 0; | |
2817 | } | |
2818 | ||
f56d5db9 LP |
2819 | if (!dangerous) { |
2820 | if (fstatfs(fd, &s) < 0) { | |
03e334a1 | 2821 | safe_close(fd); |
f56d5db9 LP |
2822 | return -errno; |
2823 | } | |
ad293f5a | 2824 | |
943aad8c | 2825 | if (!is_temporary_fs(&s)) { |
f56d5db9 | 2826 | log_error("Attempted to remove disk file system, and we can't allow that."); |
03e334a1 | 2827 | safe_close(fd); |
f56d5db9 LP |
2828 | return -EPERM; |
2829 | } | |
2830 | } | |
2831 | ||
2832 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
2833 | if (delete_root) { |
2834 | ||
8d53b453 | 2835 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 2836 | return r; |
8c6db833 | 2837 | |
e27796a0 | 2838 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
2839 | if (r == 0) |
2840 | r = -errno; | |
2841 | } | |
ad293f5a | 2842 | } |
8c6db833 LP |
2843 | |
2844 | return r; | |
2845 | } | |
2846 | ||
f56d5db9 LP |
2847 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
2848 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
2849 | } | |
2850 | ||
2851 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
2852 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
2853 | } | |
2854 | ||
8c6db833 LP |
2855 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
2856 | assert(path); | |
2857 | ||
2858 | /* Under the assumption that we are running privileged we | |
2859 | * first change the access mode and only then hand out | |
2860 | * ownership to avoid a window where access is too open. */ | |
2861 | ||
8d53b453 LP |
2862 | if (mode != (mode_t) -1) |
2863 | if (chmod(path, mode) < 0) | |
2864 | return -errno; | |
8c6db833 | 2865 | |
8d53b453 LP |
2866 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2867 | if (chown(path, uid, gid) < 0) | |
2868 | return -errno; | |
8c6db833 LP |
2869 | |
2870 | return 0; | |
ef2f1067 LP |
2871 | } |
2872 | ||
f4b47811 LP |
2873 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
2874 | assert(fd >= 0); | |
2875 | ||
2876 | /* Under the assumption that we are running privileged we | |
2877 | * first change the access mode and only then hand out | |
2878 | * ownership to avoid a window where access is too open. */ | |
2879 | ||
9588bc32 LP |
2880 | if (mode != (mode_t) -1) |
2881 | if (fchmod(fd, mode) < 0) | |
2882 | return -errno; | |
f4b47811 | 2883 | |
9588bc32 LP |
2884 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2885 | if (fchown(fd, uid, gid) < 0) | |
2886 | return -errno; | |
f4b47811 LP |
2887 | |
2888 | return 0; | |
2889 | } | |
2890 | ||
82c121a4 LP |
2891 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2892 | cpu_set_t *r; | |
2893 | unsigned n = 1024; | |
2894 | ||
2895 | /* Allocates the cpuset in the right size */ | |
2896 | ||
2897 | for (;;) { | |
2898 | if (!(r = CPU_ALLOC(n))) | |
2899 | return NULL; | |
2900 | ||
2901 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2902 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2903 | ||
2904 | if (ncpus) | |
2905 | *ncpus = n; | |
2906 | ||
2907 | return r; | |
2908 | } | |
2909 | ||
2910 | CPU_FREE(r); | |
2911 | ||
2912 | if (errno != EINVAL) | |
2913 | return NULL; | |
2914 | ||
2915 | n *= 2; | |
2916 | } | |
2917 | } | |
2918 | ||
984a2be4 | 2919 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) { |
9ab7a8d2 | 2920 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
2921 | _cleanup_free_ char *s = NULL; |
2922 | _cleanup_close_ int fd = -1; | |
b92bea5d | 2923 | struct iovec iovec[6] = {}; |
81beb750 | 2924 | int n = 0; |
984a2be4 | 2925 | static bool prev_ephemeral; |
9e58ff9c LP |
2926 | |
2927 | assert(format); | |
2928 | ||
9ab7a8d2 | 2929 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
2930 | * optional and go exclusively to the console. */ |
2931 | ||
2932 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 2933 | return log_oom(); |
9e58ff9c | 2934 | |
67e5cc4f | 2935 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 2936 | if (fd < 0) |
669bec5d | 2937 | return fd; |
9e58ff9c | 2938 | |
67e5cc4f | 2939 | if (ellipse) { |
9ab7a8d2 MS |
2940 | char *e; |
2941 | size_t emax, sl; | |
2942 | int c; | |
2943 | ||
67e5cc4f LP |
2944 | c = fd_columns(fd); |
2945 | if (c <= 0) | |
2946 | c = 80; | |
81beb750 | 2947 | |
669bec5d | 2948 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
2949 | |
2950 | emax = c - sl - 1; | |
2951 | if (emax < 3) | |
2952 | emax = 3; | |
81beb750 | 2953 | |
67e5cc4f LP |
2954 | e = ellipsize(s, emax, 75); |
2955 | if (e) { | |
2956 | free(s); | |
2957 | s = e; | |
2958 | } | |
81beb750 LP |
2959 | } |
2960 | ||
984a2be4 MS |
2961 | if (prev_ephemeral) |
2962 | IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE); | |
2963 | prev_ephemeral = ephemeral; | |
2964 | ||
9ab7a8d2 MS |
2965 | if (status) { |
2966 | if (!isempty(status)) { | |
2967 | IOVEC_SET_STRING(iovec[n++], "["); | |
2968 | IOVEC_SET_STRING(iovec[n++], status); | |
2969 | IOVEC_SET_STRING(iovec[n++], "] "); | |
2970 | } else | |
2971 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
2972 | } |
2973 | ||
9ab7a8d2 | 2974 | IOVEC_SET_STRING(iovec[n++], s); |
984a2be4 MS |
2975 | if (!ephemeral) |
2976 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 2977 | |
669bec5d LP |
2978 | if (writev(fd, iovec, n) < 0) |
2979 | return -errno; | |
9e58ff9c | 2980 | |
669bec5d | 2981 | return 0; |
9e58ff9c LP |
2982 | } |
2983 | ||
984a2be4 | 2984 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) { |
c846ff47 | 2985 | va_list ap; |
669bec5d | 2986 | int r; |
c846ff47 LP |
2987 | |
2988 | assert(format); | |
2989 | ||
2990 | va_start(ap, format); | |
984a2be4 | 2991 | r = status_vprintf(status, ellipse, ephemeral, format, ap); |
c846ff47 | 2992 | va_end(ap); |
669bec5d LP |
2993 | |
2994 | return r; | |
c846ff47 LP |
2995 | } |
2996 | ||
fab56fc5 LP |
2997 | char *replace_env(const char *format, char **env) { |
2998 | enum { | |
2999 | WORD, | |
c24eb49e | 3000 | CURLY, |
fab56fc5 LP |
3001 | VARIABLE |
3002 | } state = WORD; | |
3003 | ||
3004 | const char *e, *word = format; | |
3005 | char *r = NULL, *k; | |
3006 | ||
3007 | assert(format); | |
3008 | ||
3009 | for (e = format; *e; e ++) { | |
3010 | ||
3011 | switch (state) { | |
3012 | ||
3013 | case WORD: | |
3014 | if (*e == '$') | |
c24eb49e | 3015 | state = CURLY; |
fab56fc5 LP |
3016 | break; |
3017 | ||
c24eb49e LP |
3018 | case CURLY: |
3019 | if (*e == '{') { | |
fab56fc5 LP |
3020 | if (!(k = strnappend(r, word, e-word-1))) |
3021 | goto fail; | |
3022 | ||
3023 | free(r); | |
3024 | r = k; | |
3025 | ||
3026 | word = e-1; | |
3027 | state = VARIABLE; | |
3028 | ||
3029 | } else if (*e == '$') { | |
3030 | if (!(k = strnappend(r, word, e-word))) | |
3031 | goto fail; | |
3032 | ||
3033 | free(r); | |
3034 | r = k; | |
3035 | ||
3036 | word = e+1; | |
3037 | state = WORD; | |
3038 | } else | |
3039 | state = WORD; | |
3040 | break; | |
3041 | ||
3042 | case VARIABLE: | |
c24eb49e | 3043 | if (*e == '}') { |
b95cf362 | 3044 | const char *t; |
fab56fc5 | 3045 | |
4d1a6904 | 3046 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 3047 | |
4d1a6904 LP |
3048 | k = strappend(r, t); |
3049 | if (!k) | |
b95cf362 | 3050 | goto fail; |
fab56fc5 | 3051 | |
b95cf362 LP |
3052 | free(r); |
3053 | r = k; | |
fab56fc5 | 3054 | |
b95cf362 | 3055 | word = e+1; |
fab56fc5 LP |
3056 | state = WORD; |
3057 | } | |
3058 | break; | |
3059 | } | |
3060 | } | |
3061 | ||
3062 | if (!(k = strnappend(r, word, e-word))) | |
3063 | goto fail; | |
3064 | ||
3065 | free(r); | |
3066 | return k; | |
3067 | ||
3068 | fail: | |
3069 | free(r); | |
3070 | return NULL; | |
3071 | } | |
3072 | ||
3073 | char **replace_env_argv(char **argv, char **env) { | |
3074 | char **r, **i; | |
c24eb49e LP |
3075 | unsigned k = 0, l = 0; |
3076 | ||
3077 | l = strv_length(argv); | |
fab56fc5 | 3078 | |
c24eb49e | 3079 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3080 | return NULL; |
3081 | ||
3082 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3083 | |
3084 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3085 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3086 | char *e; | |
3087 | char **w, **m; | |
3088 | unsigned q; | |
c24eb49e | 3089 | |
4d1a6904 LP |
3090 | e = strv_env_get(env, *i+1); |
3091 | if (e) { | |
c24eb49e LP |
3092 | |
3093 | if (!(m = strv_split_quoted(e))) { | |
3094 | r[k] = NULL; | |
3095 | strv_free(r); | |
3096 | return NULL; | |
3097 | } | |
b95cf362 LP |
3098 | } else |
3099 | m = NULL; | |
c24eb49e | 3100 | |
b95cf362 LP |
3101 | q = strv_length(m); |
3102 | l = l + q - 1; | |
c24eb49e | 3103 | |
b95cf362 LP |
3104 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3105 | r[k] = NULL; | |
3106 | strv_free(r); | |
3107 | strv_free(m); | |
3108 | return NULL; | |
3109 | } | |
c24eb49e | 3110 | |
b95cf362 LP |
3111 | r = w; |
3112 | if (m) { | |
c24eb49e LP |
3113 | memcpy(r + k, m, q * sizeof(char*)); |
3114 | free(m); | |
c24eb49e | 3115 | } |
b95cf362 LP |
3116 | |
3117 | k += q; | |
3118 | continue; | |
c24eb49e LP |
3119 | } |
3120 | ||
3121 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3122 | if (!(r[k++] = replace_env(*i, env))) { |
3123 | strv_free(r); | |
3124 | return NULL; | |
3125 | } | |
3126 | } | |
3127 | ||
3128 | r[k] = NULL; | |
3129 | return r; | |
3130 | } | |
3131 | ||
81beb750 | 3132 | int fd_columns(int fd) { |
b92bea5d | 3133 | struct winsize ws = {}; |
81beb750 LP |
3134 | |
3135 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3136 | return -errno; | |
3137 | ||
3138 | if (ws.ws_col <= 0) | |
3139 | return -EIO; | |
3140 | ||
3141 | return ws.ws_col; | |
3142 | } | |
3143 | ||
28917d7d | 3144 | unsigned columns(void) { |
fa776d8e | 3145 | const char *e; |
7009eec2 | 3146 | int c; |
fa776d8e | 3147 | |
28917d7d LP |
3148 | if (_likely_(cached_columns > 0)) |
3149 | return cached_columns; | |
11f96fac | 3150 | |
28917d7d LP |
3151 | c = 0; |
3152 | e = getenv("COLUMNS"); | |
3153 | if (e) | |
7009eec2 | 3154 | safe_atoi(e, &c); |
fa776d8e | 3155 | |
28917d7d LP |
3156 | if (c <= 0) |
3157 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3158 | |
28917d7d LP |
3159 | if (c <= 0) |
3160 | c = 80; | |
11f96fac | 3161 | |
28917d7d LP |
3162 | cached_columns = c; |
3163 | return c; | |
11f96fac ZJS |
3164 | } |
3165 | ||
8f2d43a0 | 3166 | int fd_lines(int fd) { |
b92bea5d | 3167 | struct winsize ws = {}; |
8f2d43a0 LP |
3168 | |
3169 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3170 | return -errno; | |
3171 | ||
3172 | if (ws.ws_row <= 0) | |
3173 | return -EIO; | |
3174 | ||
3175 | return ws.ws_row; | |
3176 | } | |
3177 | ||
3178 | unsigned lines(void) { | |
8f2d43a0 | 3179 | const char *e; |
ed757c0c | 3180 | unsigned l; |
8f2d43a0 | 3181 | |
ed757c0c LP |
3182 | if (_likely_(cached_lines > 0)) |
3183 | return cached_lines; | |
8f2d43a0 | 3184 | |
ed757c0c | 3185 | l = 0; |
8f2d43a0 LP |
3186 | e = getenv("LINES"); |
3187 | if (e) | |
ed757c0c | 3188 | safe_atou(e, &l); |
8f2d43a0 | 3189 | |
ed757c0c LP |
3190 | if (l <= 0) |
3191 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3192 | |
ed757c0c LP |
3193 | if (l <= 0) |
3194 | l = 24; | |
8f2d43a0 | 3195 | |
ed757c0c LP |
3196 | cached_lines = l; |
3197 | return cached_lines; | |
3198 | } | |
3199 | ||
3200 | /* intended to be used as a SIGWINCH sighandler */ | |
3201 | void columns_lines_cache_reset(int signum) { | |
3202 | cached_columns = 0; | |
3203 | cached_lines = 0; | |
3204 | } | |
3205 | ||
3206 | bool on_tty(void) { | |
3207 | static int cached_on_tty = -1; | |
3208 | ||
3209 | if (_unlikely_(cached_on_tty < 0)) | |
3210 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3211 | ||
3212 | return cached_on_tty; | |
8f2d43a0 LP |
3213 | } |
3214 | ||
9d9951a4 HH |
3215 | int files_same(const char *filea, const char *fileb) { |
3216 | struct stat a, b; | |
b4f10a5e | 3217 | |
9d9951a4 | 3218 | if (stat(filea, &a) < 0) |
b4f10a5e LP |
3219 | return -errno; |
3220 | ||
9d9951a4 | 3221 | if (stat(fileb, &b) < 0) |
b4f10a5e LP |
3222 | return -errno; |
3223 | ||
9d9951a4 HH |
3224 | return a.st_dev == b.st_dev && |
3225 | a.st_ino == b.st_ino; | |
3226 | } | |
3227 | ||
3228 | int running_in_chroot(void) { | |
3229 | int ret; | |
3230 | ||
3231 | ret = files_same("/proc/1/root", "/"); | |
3232 | if (ret < 0) | |
3233 | return ret; | |
3234 | ||
3235 | return ret == 0; | |
b4f10a5e LP |
3236 | } |
3237 | ||
f405e86d | 3238 | static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
72f59706 | 3239 | size_t x; |
8fe914ec LP |
3240 | char *r; |
3241 | ||
3242 | assert(s); | |
3243 | assert(percent <= 100); | |
72f59706 | 3244 | assert(new_length >= 3); |
8fe914ec | 3245 | |
72f59706 LP |
3246 | if (old_length <= 3 || old_length <= new_length) |
3247 | return strndup(s, old_length); | |
8fe914ec | 3248 | |
72f59706 LP |
3249 | r = new0(char, new_length+1); |
3250 | if (!r) | |
a6f0104a | 3251 | return NULL; |
8fe914ec | 3252 | |
72f59706 | 3253 | x = (new_length * percent) / 100; |
8fe914ec | 3254 | |
72f59706 LP |
3255 | if (x > new_length - 3) |
3256 | x = new_length - 3; | |
8fe914ec LP |
3257 | |
3258 | memcpy(r, s, x); | |
3259 | r[x] = '.'; | |
3260 | r[x+1] = '.'; | |
3261 | r[x+2] = '.'; | |
3262 | memcpy(r + x + 3, | |
72f59706 LP |
3263 | s + old_length - (new_length - x - 3), |
3264 | new_length - x - 3); | |
8fe914ec LP |
3265 | |
3266 | return r; | |
3267 | } | |
3268 | ||
f405e86d SL |
3269 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3270 | size_t x; | |
3271 | char *e; | |
3272 | const char *i, *j; | |
3273 | unsigned k, len, len2; | |
3274 | ||
3275 | assert(s); | |
3276 | assert(percent <= 100); | |
3277 | assert(new_length >= 3); | |
3278 | ||
3279 | /* if no multibyte characters use ascii_ellipsize_mem for speed */ | |
3280 | if (ascii_is_valid(s)) | |
3281 | return ascii_ellipsize_mem(s, old_length, new_length, percent); | |
3282 | ||
3283 | if (old_length <= 3 || old_length <= new_length) | |
3284 | return strndup(s, old_length); | |
3285 | ||
3286 | x = (new_length * percent) / 100; | |
3287 | ||
3288 | if (x > new_length - 3) | |
3289 | x = new_length - 3; | |
3290 | ||
3291 | k = 0; | |
3292 | for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) { | |
3293 | int c; | |
3294 | ||
3295 | c = utf8_encoded_to_unichar(i); | |
3296 | if (c < 0) | |
3297 | return NULL; | |
3298 | k += unichar_iswide(c) ? 2 : 1; | |
3299 | } | |
3300 | ||
3301 | if (k > x) /* last character was wide and went over quota */ | |
3302 | x ++; | |
3303 | ||
3304 | for (j = s + old_length; k < new_length && j > i; ) { | |
3305 | int c; | |
3306 | ||
3307 | j = utf8_prev_char(j); | |
3308 | c = utf8_encoded_to_unichar(j); | |
3309 | if (c < 0) | |
3310 | return NULL; | |
3311 | k += unichar_iswide(c) ? 2 : 1; | |
3312 | } | |
3313 | assert(i <= j); | |
3314 | ||
3315 | /* we don't actually need to ellipsize */ | |
3316 | if (i == j) | |
3317 | return memdup(s, old_length + 1); | |
3318 | ||
3319 | /* make space for ellipsis */ | |
3320 | j = utf8_next_char(j); | |
3321 | ||
3322 | len = i - s; | |
3323 | len2 = s + old_length - j; | |
3324 | e = new(char, len + 3 + len2 + 1); | |
3325 | if (!e) | |
3326 | return NULL; | |
3327 | ||
3328 | /* | |
3329 | printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n", | |
3330 | old_length, new_length, x, len, len2, k); | |
3331 | */ | |
3332 | ||
3333 | memcpy(e, s, len); | |
3334 | e[len] = 0xe2; /* tri-dot ellipsis: … */ | |
3335 | e[len + 1] = 0x80; | |
3336 | e[len + 2] = 0xa6; | |
3337 | ||
3338 | memcpy(e + len + 3, j, len2 + 1); | |
3339 | ||
3340 | return e; | |
3341 | } | |
3342 | ||
72f59706 LP |
3343 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3344 | return ellipsize_mem(s, strlen(s), length, percent); | |
3345 | } | |
3346 | ||
f6144808 | 3347 | int touch(const char *path) { |
03e334a1 | 3348 | _cleanup_close_ int fd; |
f6144808 LP |
3349 | |
3350 | assert(path); | |
3351 | ||
73836c5c LP |
3352 | /* This just opens the file for writing, ensuring it |
3353 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3354 | * does it. */ | |
3355 | ||
3356 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3357 | if (fd < 0) | |
f6144808 LP |
3358 | return -errno; |
3359 | ||
f6144808 LP |
3360 | return 0; |
3361 | } | |
afea26ad | 3362 | |
97c4a07d | 3363 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3364 | size_t l; |
3365 | assert(s); | |
3366 | ||
73836c5c LP |
3367 | /* This is rather stupid, simply removes the heading and |
3368 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3369 | * escaping or anything. We should make this smarter one |
3370 | * day...*/ | |
73836c5c | 3371 | |
31ed59c5 LP |
3372 | l = strlen(s); |
3373 | if (l < 2) | |
11ce3427 LP |
3374 | return strdup(s); |
3375 | ||
97c4a07d | 3376 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3377 | return strndup(s+1, l-2); |
3378 | ||
3379 | return strdup(s); | |
3380 | } | |
3381 | ||
5f7c426e | 3382 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3383 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3384 | char *eq, *r; | |
5f7c426e | 3385 | |
57f30678 LP |
3386 | eq = strchr(s, '='); |
3387 | if (!eq) { | |
3388 | char *t; | |
5f7c426e | 3389 | |
57f30678 LP |
3390 | r = strdup(s); |
3391 | if (!r) | |
5f7c426e LP |
3392 | return NULL; |
3393 | ||
57f30678 LP |
3394 | t = strstrip(r); |
3395 | if (t == r) | |
3396 | return r; | |
3397 | ||
3398 | memmove(r, t, strlen(t) + 1); | |
3399 | return r; | |
5f7c426e LP |
3400 | } |
3401 | ||
57f30678 LP |
3402 | name = strndup(s, eq - s); |
3403 | if (!name) | |
5f7c426e LP |
3404 | return NULL; |
3405 | ||
57f30678 LP |
3406 | p = strdup(eq + 1); |
3407 | if (!p) | |
5f7c426e | 3408 | return NULL; |
5f7c426e LP |
3409 | |
3410 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3411 | if (!value) |
5f7c426e | 3412 | return NULL; |
5f7c426e | 3413 | |
57f30678 | 3414 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3415 | r = NULL; |
3416 | ||
5f7c426e LP |
3417 | return r; |
3418 | } | |
3419 | ||
8e12a6ae | 3420 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3421 | siginfo_t dummy; |
3422 | ||
2e78aa99 | 3423 | assert(pid >= 1); |
1968a360 LP |
3424 | |
3425 | if (!status) | |
3426 | status = &dummy; | |
2e78aa99 LP |
3427 | |
3428 | for (;;) { | |
8e12a6ae LP |
3429 | zero(*status); |
3430 | ||
3431 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3432 | |
3433 | if (errno == EINTR) | |
3434 | continue; | |
3435 | ||
3436 | return -errno; | |
3437 | } | |
3438 | ||
3439 | return 0; | |
3440 | } | |
3441 | } | |
3442 | ||
97c4a07d LP |
3443 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3444 | int r; | |
3445 | siginfo_t status; | |
3446 | ||
3447 | assert(name); | |
3448 | assert(pid > 1); | |
3449 | ||
d87be9b0 LP |
3450 | r = wait_for_terminate(pid, &status); |
3451 | if (r < 0) { | |
97c4a07d LP |
3452 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3453 | return r; | |
3454 | } | |
3455 | ||
3456 | if (status.si_code == CLD_EXITED) { | |
3457 | if (status.si_status != 0) { | |
3458 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3459 | return status.si_status; |
97c4a07d LP |
3460 | } |
3461 | ||
3462 | log_debug("%s succeeded.", name); | |
3463 | return 0; | |
3464 | ||
3465 | } else if (status.si_code == CLD_KILLED || | |
3466 | status.si_code == CLD_DUMPED) { | |
3467 | ||
3468 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3469 | return -EPROTO; | |
3470 | } | |
3471 | ||
3472 | log_warning("%s failed due to unknown reason.", name); | |
3473 | return -EPROTO; | |
97c4a07d LP |
3474 | } |
3475 | ||
919ce0b7 | 3476 | noreturn void freeze(void) { |
720ce21d LP |
3477 | |
3478 | /* Make sure nobody waits for us on a socket anymore */ | |
3479 | close_all_fds(NULL, 0); | |
3480 | ||
c29597a1 LP |
3481 | sync(); |
3482 | ||
3c14d26c LP |
3483 | for (;;) |
3484 | pause(); | |
3485 | } | |
3486 | ||
00dc5d76 LP |
3487 | bool null_or_empty(struct stat *st) { |
3488 | assert(st); | |
3489 | ||
3490 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3491 | return true; | |
3492 | ||
c8f26f42 | 3493 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3494 | return true; |
3495 | ||
3496 | return false; | |
3497 | } | |
3498 | ||
83096483 LP |
3499 | int null_or_empty_path(const char *fn) { |
3500 | struct stat st; | |
3501 | ||
3502 | assert(fn); | |
3503 | ||
3504 | if (stat(fn, &st) < 0) | |
3505 | return -errno; | |
3506 | ||
3507 | return null_or_empty(&st); | |
3508 | } | |
3509 | ||
a247755d | 3510 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3511 | int nfd; |
3512 | DIR *d; | |
3513 | ||
dd94c17e LP |
3514 | assert(!(flags & O_CREAT)); |
3515 | ||
3516 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
73836c5c | 3517 | if (nfd < 0) |
c4731d11 LP |
3518 | return NULL; |
3519 | ||
73836c5c LP |
3520 | d = fdopendir(nfd); |
3521 | if (!d) { | |
03e334a1 | 3522 | safe_close(nfd); |
c4731d11 LP |
3523 | return NULL; |
3524 | } | |
3525 | ||
3526 | return d; | |
3b63d2d3 LP |
3527 | } |
3528 | ||
8a0867d6 LP |
3529 | int signal_from_string_try_harder(const char *s) { |
3530 | int signo; | |
3531 | assert(s); | |
3532 | ||
73836c5c LP |
3533 | signo = signal_from_string(s); |
3534 | if (signo <= 0) | |
8a0867d6 LP |
3535 | if (startswith(s, "SIG")) |
3536 | return signal_from_string(s+3); | |
3537 | ||
3538 | return signo; | |
3539 | } | |
3540 | ||
383182b5 | 3541 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
22f5f628 | 3542 | _cleanup_free_ char *t = NULL, *u = NULL; |
22f5f628 | 3543 | size_t enc_len; |
e23a0ce8 | 3544 | |
383182b5 | 3545 | u = unquote(tagvalue, "\"\'"); |
6db615c1 | 3546 | if (!u) |
383182b5 | 3547 | return NULL; |
e23a0ce8 | 3548 | |
1d5989fd | 3549 | enc_len = strlen(u) * 4 + 1; |
22f5f628 | 3550 | t = new(char, enc_len); |
6db615c1 | 3551 | if (!t) |
383182b5 | 3552 | return NULL; |
e23a0ce8 | 3553 | |
8f6ce71f | 3554 | if (encode_devnode_name(u, t, enc_len) < 0) |
22f5f628 | 3555 | return NULL; |
e23a0ce8 | 3556 | |
6db615c1 | 3557 | return strjoin("/dev/disk/by-", by, "/", t, NULL); |
383182b5 | 3558 | } |
e23a0ce8 | 3559 | |
383182b5 | 3560 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3561 | assert(p); |
3562 | ||
383182b5 DR |
3563 | if (startswith(p, "LABEL=")) |
3564 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3565 | |
383182b5 DR |
3566 | if (startswith(p, "UUID=")) |
3567 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3568 | |
84cc2abf DR |
3569 | if (startswith(p, "PARTUUID=")) |
3570 | return tag_to_udev_node(p+9, "partuuid"); | |
3571 | ||
3572 | if (startswith(p, "PARTLABEL=")) | |
3573 | return tag_to_udev_node(p+10, "partlabel"); | |
3574 | ||
e23a0ce8 LP |
3575 | return strdup(p); |
3576 | } | |
3577 | ||
f212ac12 LP |
3578 | bool tty_is_vc(const char *tty) { |
3579 | assert(tty); | |
3580 | ||
3581 | if (startswith(tty, "/dev/")) | |
3582 | tty += 5; | |
3583 | ||
98a28fef LP |
3584 | return vtnr_from_tty(tty) >= 0; |
3585 | } | |
3586 | ||
d1122ad5 LP |
3587 | bool tty_is_console(const char *tty) { |
3588 | assert(tty); | |
3589 | ||
3590 | if (startswith(tty, "/dev/")) | |
3591 | tty += 5; | |
3592 | ||
3593 | return streq(tty, "console"); | |
3594 | } | |
3595 | ||
98a28fef LP |
3596 | int vtnr_from_tty(const char *tty) { |
3597 | int i, r; | |
3598 | ||
3599 | assert(tty); | |
3600 | ||
3601 | if (startswith(tty, "/dev/")) | |
3602 | tty += 5; | |
3603 | ||
3604 | if (!startswith(tty, "tty") ) | |
3605 | return -EINVAL; | |
3606 | ||
3607 | if (tty[3] < '0' || tty[3] > '9') | |
3608 | return -EINVAL; | |
3609 | ||
3610 | r = safe_atoi(tty+3, &i); | |
3611 | if (r < 0) | |
3612 | return r; | |
3613 | ||
3614 | if (i < 0 || i > 63) | |
3615 | return -EINVAL; | |
3616 | ||
3617 | return i; | |
f212ac12 LP |
3618 | } |
3619 | ||
21baf21a MS |
3620 | char *resolve_dev_console(char **active) { |
3621 | char *tty; | |
3622 | ||
3623 | /* Resolve where /dev/console is pointing to, if /sys is actually ours | |
3624 | * (i.e. not read-only-mounted which is a sign for container setups) */ | |
3625 | ||
3626 | if (path_is_read_only_fs("/sys") > 0) | |
3627 | return NULL; | |
3628 | ||
3629 | if (read_one_line_file("/sys/class/tty/console/active", active) < 0) | |
3630 | return NULL; | |
3631 | ||
3632 | /* If multiple log outputs are configured the last one is what | |
3633 | * /dev/console points to */ | |
3634 | tty = strrchr(*active, ' '); | |
3635 | if (tty) | |
3636 | tty++; | |
3637 | else | |
3638 | tty = *active; | |
3639 | ||
8aa5429a OB |
3640 | if (streq(tty, "tty0")) { |
3641 | char *tmp; | |
3642 | ||
3643 | /* Get the active VC (e.g. tty1) */ | |
3644 | if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) { | |
3645 | free(*active); | |
3646 | tty = *active = tmp; | |
3647 | } | |
3648 | } | |
3649 | ||
21baf21a MS |
3650 | return tty; |
3651 | } | |
3652 | ||
3043935f | 3653 | bool tty_is_vc_resolve(const char *tty) { |
9588bc32 | 3654 | _cleanup_free_ char *active = NULL; |
3030ccd7 | 3655 | |
e3aa71c3 LP |
3656 | assert(tty); |
3657 | ||
3658 | if (startswith(tty, "/dev/")) | |
3659 | tty += 5; | |
3660 | ||
21baf21a MS |
3661 | if (streq(tty, "console")) { |
3662 | tty = resolve_dev_console(&active); | |
3663 | if (!tty) | |
3664 | return false; | |
3665 | } | |
3030ccd7 | 3666 | |
9588bc32 | 3667 | return tty_is_vc(tty); |
3043935f LP |
3668 | } |
3669 | ||
3670 | const char *default_term_for_tty(const char *tty) { | |
3671 | assert(tty); | |
3672 | ||
acda6a05 | 3673 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3674 | } |
3675 | ||
87d2c1ff | 3676 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3677 | assert(de); |
3678 | ||
3679 | if (ignore_file(de->d_name)) | |
3680 | return false; | |
3681 | ||
3682 | if (de->d_type != DT_REG && | |
3683 | de->d_type != DT_LNK && | |
3684 | de->d_type != DT_UNKNOWN) | |
3685 | return false; | |
3686 | ||
3687 | return true; | |
3688 | } | |
3689 | ||
87d2c1ff LP |
3690 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3691 | assert(de); | |
3692 | ||
a228a22f LP |
3693 | if (de->d_type != DT_REG && |
3694 | de->d_type != DT_LNK && | |
3695 | de->d_type != DT_UNKNOWN) | |
3696 | return false; | |
3697 | ||
3698 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3699 | return false; |
3700 | ||
3701 | return endswith(de->d_name, suffix); | |
3702 | } | |
3703 | ||
aa62a893 LP |
3704 | void execute_directory(const char *directory, DIR *d, usec_t timeout, char *argv[]) { |
3705 | pid_t executor_pid; | |
3706 | int r; | |
83cc030f LP |
3707 | |
3708 | assert(directory); | |
3709 | ||
aa62a893 LP |
3710 | /* Executes all binaries in a directory in parallel and waits |
3711 | * for them to finish. Optionally a timeout is applied. */ | |
83cc030f | 3712 | |
aa62a893 LP |
3713 | executor_pid = fork(); |
3714 | if (executor_pid < 0) { | |
3715 | log_error("Failed to fork: %m"); | |
3716 | return; | |
83cc030f | 3717 | |
aa62a893 LP |
3718 | } else if (executor_pid == 0) { |
3719 | _cleanup_hashmap_free_free_ Hashmap *pids = NULL; | |
3720 | _cleanup_closedir_ DIR *_d = NULL; | |
3721 | struct dirent *de; | |
3722 | sigset_t ss; | |
83cc030f | 3723 | |
aa62a893 LP |
3724 | /* We fork this all off from a child process so that |
3725 | * we can somewhat cleanly make use of SIGALRM to set | |
3726 | * a time limit */ | |
83cc030f | 3727 | |
aa62a893 | 3728 | reset_all_signal_handlers(); |
83cc030f | 3729 | |
aa62a893 LP |
3730 | assert_se(sigemptyset(&ss) == 0); |
3731 | assert_se(sigprocmask(SIG_SETMASK, &ss, NULL) == 0); | |
83cc030f | 3732 | |
aa62a893 | 3733 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 3734 | |
aa62a893 LP |
3735 | if (!d) { |
3736 | d = _d = opendir(directory); | |
3737 | if (!d) { | |
3738 | if (errno == ENOENT) | |
3739 | _exit(EXIT_SUCCESS); | |
83cc030f | 3740 | |
aa62a893 LP |
3741 | log_error("Failed to enumerate directory %s: %m", directory); |
3742 | _exit(EXIT_FAILURE); | |
3743 | } | |
83cc030f LP |
3744 | } |
3745 | ||
aa62a893 LP |
3746 | pids = hashmap_new(NULL, NULL); |
3747 | if (!pids) { | |
3748 | log_oom(); | |
3749 | _exit(EXIT_FAILURE); | |
83cc030f LP |
3750 | } |
3751 | ||
aa62a893 LP |
3752 | FOREACH_DIRENT(de, d, break) { |
3753 | _cleanup_free_ char *path = NULL; | |
3754 | pid_t pid; | |
83cc030f | 3755 | |
aa62a893 LP |
3756 | if (!dirent_is_file(de)) |
3757 | continue; | |
83cc030f | 3758 | |
aa62a893 LP |
3759 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { |
3760 | log_oom(); | |
3761 | _exit(EXIT_FAILURE); | |
3762 | } | |
83cc030f | 3763 | |
aa62a893 LP |
3764 | pid = fork(); |
3765 | if (pid < 0) { | |
3766 | log_error("Failed to fork: %m"); | |
3767 | continue; | |
3768 | } else if (pid == 0) { | |
3769 | char *_argv[2]; | |
83cc030f | 3770 | |
aa62a893 | 3771 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 3772 | |
aa62a893 LP |
3773 | if (!argv) { |
3774 | _argv[0] = path; | |
3775 | _argv[1] = NULL; | |
3776 | argv = _argv; | |
3777 | } else | |
3778 | argv[0] = path; | |
83cc030f | 3779 | |
aa62a893 LP |
3780 | execv(path, argv); |
3781 | log_error("Failed to execute %s: %m", path); | |
3782 | _exit(EXIT_FAILURE); | |
3783 | } | |
83cc030f | 3784 | |
83cc030f | 3785 | |
aa62a893 | 3786 | log_debug("Spawned %s as " PID_FMT ".", path, pid); |
83cc030f | 3787 | |
aa62a893 LP |
3788 | r = hashmap_put(pids, UINT_TO_PTR(pid), path); |
3789 | if (r < 0) { | |
3790 | log_oom(); | |
3791 | _exit(EXIT_FAILURE); | |
3792 | } | |
3793 | ||
3794 | path = NULL; | |
83cc030f LP |
3795 | } |
3796 | ||
aa62a893 LP |
3797 | /* Abort execution of this process after the |
3798 | * timout. We simply rely on SIGALRM as default action | |
3799 | * terminating the process, and turn on alarm(). */ | |
3800 | ||
3801 | if (timeout != (usec_t) -1) | |
3802 | alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC); | |
3803 | ||
3804 | while (!hashmap_isempty(pids)) { | |
3805 | _cleanup_free_ char *path = NULL; | |
3806 | pid_t pid; | |
3807 | ||
3808 | pid = PTR_TO_UINT(hashmap_first_key(pids)); | |
3809 | assert(pid > 0); | |
83cc030f | 3810 | |
aa62a893 LP |
3811 | path = hashmap_remove(pids, UINT_TO_PTR(pid)); |
3812 | assert(path); | |
3813 | ||
3814 | wait_for_terminate_and_warn(path, pid); | |
83cc030f | 3815 | } |
83cc030f | 3816 | |
aa62a893 LP |
3817 | _exit(EXIT_SUCCESS); |
3818 | } | |
83cc030f | 3819 | |
aa62a893 | 3820 | wait_for_terminate_and_warn(directory, executor_pid); |
83cc030f LP |
3821 | } |
3822 | ||
430c18ed LP |
3823 | int kill_and_sigcont(pid_t pid, int sig) { |
3824 | int r; | |
3825 | ||
3826 | r = kill(pid, sig) < 0 ? -errno : 0; | |
3827 | ||
3828 | if (r >= 0) | |
3829 | kill(pid, SIGCONT); | |
3830 | ||
3831 | return r; | |
3832 | } | |
3833 | ||
05feefe0 LP |
3834 | bool nulstr_contains(const char*nulstr, const char *needle) { |
3835 | const char *i; | |
3836 | ||
3837 | if (!nulstr) | |
3838 | return false; | |
3839 | ||
3840 | NULSTR_FOREACH(i, nulstr) | |
3841 | if (streq(i, needle)) | |
3842 | return true; | |
3843 | ||
3844 | return false; | |
3845 | } | |
3846 | ||
6faa1114 | 3847 | bool plymouth_running(void) { |
9408a2d2 | 3848 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
3849 | } |
3850 | ||
9beb3f4d LP |
3851 | char* strshorten(char *s, size_t l) { |
3852 | assert(s); | |
3853 | ||
3854 | if (l < strlen(s)) | |
3855 | s[l] = 0; | |
3856 | ||
3857 | return s; | |
3858 | } | |
3859 | ||
3860 | static bool hostname_valid_char(char c) { | |
3861 | return | |
3862 | (c >= 'a' && c <= 'z') || | |
3863 | (c >= 'A' && c <= 'Z') || | |
3864 | (c >= '0' && c <= '9') || | |
3865 | c == '-' || | |
3866 | c == '_' || | |
3867 | c == '.'; | |
3868 | } | |
3869 | ||
3870 | bool hostname_is_valid(const char *s) { | |
3871 | const char *p; | |
aa3c5cf8 | 3872 | bool dot; |
9beb3f4d LP |
3873 | |
3874 | if (isempty(s)) | |
3875 | return false; | |
3876 | ||
aa3c5cf8 LP |
3877 | for (p = s, dot = true; *p; p++) { |
3878 | if (*p == '.') { | |
3879 | if (dot) | |
3880 | return false; | |
3881 | ||
3882 | dot = true; | |
3883 | } else { | |
3884 | if (!hostname_valid_char(*p)) | |
3885 | return false; | |
3886 | ||
3887 | dot = false; | |
3888 | } | |
3889 | } | |
3890 | ||
3891 | if (dot) | |
3892 | return false; | |
9beb3f4d LP |
3893 | |
3894 | if (p-s > HOST_NAME_MAX) | |
3895 | return false; | |
3896 | ||
3897 | return true; | |
3898 | } | |
3899 | ||
e724b063 | 3900 | char* hostname_cleanup(char *s, bool lowercase) { |
9beb3f4d | 3901 | char *p, *d; |
cec4ead9 LP |
3902 | bool dot; |
3903 | ||
3904 | for (p = s, d = s, dot = true; *p; p++) { | |
3905 | if (*p == '.') { | |
e724b063 | 3906 | if (dot) |
cec4ead9 | 3907 | continue; |
9beb3f4d | 3908 | |
e724b063 | 3909 | *(d++) = '.'; |
cec4ead9 | 3910 | dot = true; |
e724b063 LP |
3911 | } else if (hostname_valid_char(*p)) { |
3912 | *(d++) = lowercase ? tolower(*p) : *p; | |
cec4ead9 | 3913 | dot = false; |
e724b063 | 3914 | } |
cec4ead9 | 3915 | |
cec4ead9 | 3916 | } |
9beb3f4d | 3917 | |
e724b063 LP |
3918 | if (dot && d > s) |
3919 | d[-1] = 0; | |
3920 | else | |
3921 | *d = 0; | |
3922 | ||
9beb3f4d | 3923 | strshorten(s, HOST_NAME_MAX); |
cec4ead9 | 3924 | |
9beb3f4d LP |
3925 | return s; |
3926 | } | |
3927 | ||
1325aa42 | 3928 | int pipe_eof(int fd) { |
b92bea5d ZJS |
3929 | struct pollfd pollfd = { |
3930 | .fd = fd, | |
3931 | .events = POLLIN|POLLHUP, | |
3932 | }; | |
1325aa42 | 3933 | |
d37a91e8 LP |
3934 | int r; |
3935 | ||
1325aa42 LP |
3936 | r = poll(&pollfd, 1, 0); |
3937 | if (r < 0) | |
3938 | return -errno; | |
3939 | ||
3940 | if (r == 0) | |
3941 | return 0; | |
3942 | ||
3943 | return pollfd.revents & POLLHUP; | |
3944 | } | |
3945 | ||
8f2d43a0 | 3946 | int fd_wait_for_event(int fd, int event, usec_t t) { |
968d3d24 | 3947 | |
b92bea5d ZJS |
3948 | struct pollfd pollfd = { |
3949 | .fd = fd, | |
3950 | .events = event, | |
3951 | }; | |
df50185b | 3952 | |
968d3d24 LP |
3953 | struct timespec ts; |
3954 | int r; | |
3955 | ||
3956 | r = ppoll(&pollfd, 1, t == (usec_t) -1 ? NULL : timespec_store(&ts, t), NULL); | |
df50185b LP |
3957 | if (r < 0) |
3958 | return -errno; | |
3959 | ||
3960 | if (r == 0) | |
3961 | return 0; | |
3962 | ||
3963 | return pollfd.revents; | |
3964 | } | |
3965 | ||
5a3ab509 LP |
3966 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
3967 | FILE *f; | |
3968 | char *t; | |
3969 | const char *fn; | |
3970 | size_t k; | |
3971 | int fd; | |
3972 | ||
3973 | assert(path); | |
3974 | assert(_f); | |
3975 | assert(_temp_path); | |
3976 | ||
3977 | t = new(char, strlen(path) + 1 + 6 + 1); | |
3978 | if (!t) | |
3979 | return -ENOMEM; | |
3980 | ||
2b6bf07d ZJS |
3981 | fn = basename(path); |
3982 | k = fn - path; | |
5a3ab509 LP |
3983 | memcpy(t, path, k); |
3984 | t[k] = '.'; | |
3985 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
3986 | ||
2d5bdf5b | 3987 | fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC); |
5a3ab509 LP |
3988 | if (fd < 0) { |
3989 | free(t); | |
3990 | return -errno; | |
3991 | } | |
3992 | ||
3993 | f = fdopen(fd, "we"); | |
3994 | if (!f) { | |
3995 | unlink(t); | |
3996 | free(t); | |
3997 | return -errno; | |
3998 | } | |
3999 | ||
4000 | *_f = f; | |
4001 | *_temp_path = t; | |
4002 | ||
4003 | return 0; | |
4004 | } | |
4005 | ||
6ea832a2 | 4006 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4007 | assert(fd >= 0); |
4008 | ||
6ea832a2 LP |
4009 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4010 | return -errno; | |
4011 | ||
4012 | return 0; | |
4013 | } | |
4014 | ||
4015 | int terminal_vhangup(const char *name) { | |
03e334a1 | 4016 | _cleanup_close_ int fd; |
6ea832a2 LP |
4017 | |
4018 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4019 | if (fd < 0) | |
4020 | return fd; | |
4021 | ||
03e334a1 | 4022 | return terminal_vhangup_fd(fd); |
6ea832a2 LP |
4023 | } |
4024 | ||
4025 | int vt_disallocate(const char *name) { | |
4026 | int fd, r; | |
4027 | unsigned u; | |
6ea832a2 LP |
4028 | |
4029 | /* Deallocate the VT if possible. If not possible | |
4030 | * (i.e. because it is the active one), at least clear it | |
4031 | * entirely (including the scrollback buffer) */ | |
4032 | ||
b83bc4e9 LP |
4033 | if (!startswith(name, "/dev/")) |
4034 | return -EINVAL; | |
4035 | ||
4036 | if (!tty_is_vc(name)) { | |
4037 | /* So this is not a VT. I guess we cannot deallocate | |
4038 | * it then. But let's at least clear the screen */ | |
4039 | ||
4040 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4041 | if (fd < 0) | |
4042 | return fd; | |
4043 | ||
8585357a LP |
4044 | loop_write(fd, |
4045 | "\033[r" /* clear scrolling region */ | |
4046 | "\033[H" /* move home */ | |
4047 | "\033[2J", /* clear screen */ | |
4048 | 10, false); | |
03e334a1 | 4049 | safe_close(fd); |
b83bc4e9 LP |
4050 | |
4051 | return 0; | |
4052 | } | |
6ea832a2 LP |
4053 | |
4054 | if (!startswith(name, "/dev/tty")) | |
4055 | return -EINVAL; | |
4056 | ||
4057 | r = safe_atou(name+8, &u); | |
4058 | if (r < 0) | |
4059 | return r; | |
4060 | ||
4061 | if (u <= 0) | |
b83bc4e9 | 4062 | return -EINVAL; |
6ea832a2 | 4063 | |
b83bc4e9 | 4064 | /* Try to deallocate */ |
6ea832a2 LP |
4065 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4066 | if (fd < 0) | |
4067 | return fd; | |
4068 | ||
4069 | r = ioctl(fd, VT_DISALLOCATE, u); | |
03e334a1 | 4070 | safe_close(fd); |
6ea832a2 | 4071 | |
b83bc4e9 LP |
4072 | if (r >= 0) |
4073 | return 0; | |
6ea832a2 | 4074 | |
b83bc4e9 | 4075 | if (errno != EBUSY) |
6ea832a2 | 4076 | return -errno; |
6ea832a2 | 4077 | |
b83bc4e9 LP |
4078 | /* Couldn't deallocate, so let's clear it fully with |
4079 | * scrollback */ | |
4080 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4081 | if (fd < 0) |
b83bc4e9 | 4082 | return fd; |
6ea832a2 | 4083 | |
8585357a LP |
4084 | loop_write(fd, |
4085 | "\033[r" /* clear scrolling region */ | |
4086 | "\033[H" /* move home */ | |
4087 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4088 | 10, false); | |
03e334a1 | 4089 | safe_close(fd); |
6ea832a2 | 4090 | |
b83bc4e9 | 4091 | return 0; |
6ea832a2 LP |
4092 | } |
4093 | ||
51045322 LP |
4094 | int copy_file(const char *from, const char *to, int flags) { |
4095 | _cleanup_close_ int fdf = -1; | |
4096 | int r, fdt; | |
34ca941c LP |
4097 | |
4098 | assert(from); | |
4099 | assert(to); | |
4100 | ||
4101 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4102 | if (fdf < 0) | |
4103 | return -errno; | |
4104 | ||
51045322 LP |
4105 | fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); |
4106 | if (fdt < 0) | |
34ca941c | 4107 | return -errno; |
34ca941c LP |
4108 | |
4109 | for (;;) { | |
4110 | char buf[PIPE_BUF]; | |
4111 | ssize_t n, k; | |
4112 | ||
4113 | n = read(fdf, buf, sizeof(buf)); | |
4114 | if (n < 0) { | |
4115 | r = -errno; | |
4116 | ||
34ca941c LP |
4117 | close_nointr(fdt); |
4118 | unlink(to); | |
4119 | ||
4120 | return r; | |
4121 | } | |
4122 | ||
4123 | if (n == 0) | |
4124 | break; | |
4125 | ||
4126 | errno = 0; | |
4127 | k = loop_write(fdt, buf, n, false); | |
4128 | if (n != k) { | |
4129 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4130 | ||
34ca941c | 4131 | close_nointr(fdt); |
34ca941c | 4132 | unlink(to); |
51045322 | 4133 | |
34ca941c LP |
4134 | return r; |
4135 | } | |
4136 | } | |
4137 | ||
34ca941c LP |
4138 | r = close_nointr(fdt); |
4139 | ||
4140 | if (r < 0) { | |
4141 | unlink(to); | |
4142 | return r; | |
4143 | } | |
4144 | ||
4145 | return 0; | |
4146 | } | |
4147 | ||
424a19f8 LP |
4148 | int symlink_atomic(const char *from, const char *to) { |
4149 | char *x; | |
4150 | _cleanup_free_ char *t; | |
34ca941c LP |
4151 | const char *fn; |
4152 | size_t k; | |
9bf3b535 | 4153 | uint64_t u; |
34ca941c LP |
4154 | unsigned i; |
4155 | int r; | |
4156 | ||
4157 | assert(from); | |
4158 | assert(to); | |
4159 | ||
4160 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4161 | if (!t) | |
4162 | return -ENOMEM; | |
4163 | ||
2b6bf07d | 4164 | fn = basename(to); |
34ca941c LP |
4165 | k = fn-to; |
4166 | memcpy(t, to, k); | |
4167 | t[k] = '.'; | |
4168 | x = stpcpy(t+k+1, fn); | |
4169 | ||
9bf3b535 | 4170 | u = random_u64(); |
34ca941c | 4171 | for (i = 0; i < 16; i++) { |
9bf3b535 LP |
4172 | *(x++) = hexchar(u & 0xF); |
4173 | u >>= 4; | |
34ca941c LP |
4174 | } |
4175 | ||
4176 | *x = 0; | |
4177 | ||
424a19f8 LP |
4178 | if (symlink(from, t) < 0) |
4179 | return -errno; | |
34ca941c LP |
4180 | |
4181 | if (rename(t, to) < 0) { | |
4182 | r = -errno; | |
4183 | unlink(t); | |
34ca941c LP |
4184 | return r; |
4185 | } | |
4186 | ||
424a19f8 | 4187 | return 0; |
34ca941c LP |
4188 | } |
4189 | ||
4d6d6518 LP |
4190 | bool display_is_local(const char *display) { |
4191 | assert(display); | |
4192 | ||
4193 | return | |
4194 | display[0] == ':' && | |
4195 | display[1] >= '0' && | |
4196 | display[1] <= '9'; | |
4197 | } | |
4198 | ||
4199 | int socket_from_display(const char *display, char **path) { | |
4200 | size_t k; | |
4201 | char *f, *c; | |
4202 | ||
4203 | assert(display); | |
4204 | assert(path); | |
4205 | ||
4206 | if (!display_is_local(display)) | |
4207 | return -EINVAL; | |
4208 | ||
4209 | k = strspn(display+1, "0123456789"); | |
4210 | ||
f8294e41 | 4211 | f = new(char, strlen("/tmp/.X11-unix/X") + k + 1); |
4d6d6518 LP |
4212 | if (!f) |
4213 | return -ENOMEM; | |
4214 | ||
4215 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4216 | memcpy(c, display+1, k); | |
4217 | c[k] = 0; | |
4218 | ||
4219 | *path = f; | |
4220 | ||
4221 | return 0; | |
4222 | } | |
4223 | ||
d05c5031 LP |
4224 | int get_user_creds( |
4225 | const char **username, | |
4226 | uid_t *uid, gid_t *gid, | |
4227 | const char **home, | |
4228 | const char **shell) { | |
4229 | ||
1cccf435 | 4230 | struct passwd *p; |
ddd88763 | 4231 | uid_t u; |
1cccf435 MV |
4232 | |
4233 | assert(username); | |
4234 | assert(*username); | |
1cccf435 MV |
4235 | |
4236 | /* We enforce some special rules for uid=0: in order to avoid | |
4237 | * NSS lookups for root we hardcode its data. */ | |
4238 | ||
4239 | if (streq(*username, "root") || streq(*username, "0")) { | |
4240 | *username = "root"; | |
4b67834e LP |
4241 | |
4242 | if (uid) | |
4243 | *uid = 0; | |
4244 | ||
4245 | if (gid) | |
4246 | *gid = 0; | |
4247 | ||
4248 | if (home) | |
4249 | *home = "/root"; | |
d05c5031 LP |
4250 | |
4251 | if (shell) | |
4252 | *shell = "/bin/sh"; | |
4253 | ||
1cccf435 MV |
4254 | return 0; |
4255 | } | |
4256 | ||
ddd88763 | 4257 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4258 | errno = 0; |
ddd88763 | 4259 | p = getpwuid(u); |
1cccf435 MV |
4260 | |
4261 | /* If there are multiple users with the same id, make | |
4262 | * sure to leave $USER to the configured value instead | |
4263 | * of the first occurrence in the database. However if | |
4264 | * the uid was configured by a numeric uid, then let's | |
4265 | * pick the real username from /etc/passwd. */ | |
4266 | if (p) | |
4267 | *username = p->pw_name; | |
4268 | } else { | |
4269 | errno = 0; | |
4270 | p = getpwnam(*username); | |
4271 | } | |
4272 | ||
4273 | if (!p) | |
8333c77e | 4274 | return errno > 0 ? -errno : -ESRCH; |
1cccf435 | 4275 | |
4b67834e LP |
4276 | if (uid) |
4277 | *uid = p->pw_uid; | |
4278 | ||
4279 | if (gid) | |
4280 | *gid = p->pw_gid; | |
4281 | ||
4282 | if (home) | |
4283 | *home = p->pw_dir; | |
4284 | ||
d05c5031 LP |
4285 | if (shell) |
4286 | *shell = p->pw_shell; | |
4287 | ||
4b67834e LP |
4288 | return 0; |
4289 | } | |
4290 | ||
59164be4 LP |
4291 | char* uid_to_name(uid_t uid) { |
4292 | struct passwd *p; | |
4293 | char *r; | |
4294 | ||
4295 | if (uid == 0) | |
4296 | return strdup("root"); | |
4297 | ||
4298 | p = getpwuid(uid); | |
4299 | if (p) | |
4300 | return strdup(p->pw_name); | |
4301 | ||
de0671ee | 4302 | if (asprintf(&r, UID_FMT, uid) < 0) |
59164be4 LP |
4303 | return NULL; |
4304 | ||
4305 | return r; | |
4306 | } | |
4307 | ||
4468addc LP |
4308 | char* gid_to_name(gid_t gid) { |
4309 | struct group *p; | |
4310 | char *r; | |
4311 | ||
4312 | if (gid == 0) | |
4313 | return strdup("root"); | |
4314 | ||
4315 | p = getgrgid(gid); | |
4316 | if (p) | |
4317 | return strdup(p->gr_name); | |
4318 | ||
de0671ee | 4319 | if (asprintf(&r, GID_FMT, gid) < 0) |
4468addc LP |
4320 | return NULL; |
4321 | ||
4322 | return r; | |
4323 | } | |
4324 | ||
4b67834e LP |
4325 | int get_group_creds(const char **groupname, gid_t *gid) { |
4326 | struct group *g; | |
4327 | gid_t id; | |
4328 | ||
4329 | assert(groupname); | |
4330 | ||
4331 | /* We enforce some special rules for gid=0: in order to avoid | |
4332 | * NSS lookups for root we hardcode its data. */ | |
4333 | ||
4334 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4335 | *groupname = "root"; | |
4336 | ||
4337 | if (gid) | |
4338 | *gid = 0; | |
4339 | ||
4340 | return 0; | |
4341 | } | |
4342 | ||
4343 | if (parse_gid(*groupname, &id) >= 0) { | |
4344 | errno = 0; | |
4345 | g = getgrgid(id); | |
4346 | ||
4347 | if (g) | |
4348 | *groupname = g->gr_name; | |
4349 | } else { | |
4350 | errno = 0; | |
4351 | g = getgrnam(*groupname); | |
4352 | } | |
4353 | ||
4354 | if (!g) | |
8333c77e | 4355 | return errno > 0 ? -errno : -ESRCH; |
4b67834e LP |
4356 | |
4357 | if (gid) | |
4358 | *gid = g->gr_gid; | |
4359 | ||
1cccf435 MV |
4360 | return 0; |
4361 | } | |
4362 | ||
4468addc LP |
4363 | int in_gid(gid_t gid) { |
4364 | gid_t *gids; | |
43673799 LP |
4365 | int ngroups_max, r, i; |
4366 | ||
43673799 LP |
4367 | if (getgid() == gid) |
4368 | return 1; | |
4369 | ||
4370 | if (getegid() == gid) | |
4371 | return 1; | |
4372 | ||
4373 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4374 | assert(ngroups_max > 0); | |
4375 | ||
4376 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4377 | ||
4378 | r = getgroups(ngroups_max, gids); | |
4379 | if (r < 0) | |
4380 | return -errno; | |
4381 | ||
4382 | for (i = 0; i < r; i++) | |
4383 | if (gids[i] == gid) | |
4384 | return 1; | |
4385 | ||
4386 | return 0; | |
4387 | } | |
4388 | ||
4468addc LP |
4389 | int in_group(const char *name) { |
4390 | int r; | |
4391 | gid_t gid; | |
4392 | ||
4393 | r = get_group_creds(&name, &gid); | |
4394 | if (r < 0) | |
4395 | return r; | |
4396 | ||
4397 | return in_gid(gid); | |
4398 | } | |
4399 | ||
8092a428 | 4400 | int glob_exists(const char *path) { |
7fd1b19b | 4401 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 4402 | int k; |
8092a428 LP |
4403 | |
4404 | assert(path); | |
4405 | ||
8092a428 LP |
4406 | errno = 0; |
4407 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4408 | ||
4409 | if (k == GLOB_NOMATCH) | |
8d98da3f | 4410 | return 0; |
8092a428 | 4411 | else if (k == GLOB_NOSPACE) |
8d98da3f | 4412 | return -ENOMEM; |
8092a428 | 4413 | else if (k == 0) |
8d98da3f | 4414 | return !strv_isempty(g.gl_pathv); |
8092a428 | 4415 | else |
8d98da3f ZJS |
4416 | return errno ? -errno : -EIO; |
4417 | } | |
8092a428 | 4418 | |
8d98da3f ZJS |
4419 | int glob_extend(char ***strv, const char *path) { |
4420 | _cleanup_globfree_ glob_t g = {}; | |
4421 | int k; | |
4422 | char **p; | |
4423 | ||
4424 | errno = 0; | |
a8ccacf5 | 4425 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
4426 | |
4427 | if (k == GLOB_NOMATCH) | |
4428 | return -ENOENT; | |
4429 | else if (k == GLOB_NOSPACE) | |
4430 | return -ENOMEM; | |
4431 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
4432 | return errno ? -errno : -EIO; | |
4433 | ||
4434 | STRV_FOREACH(p, g.gl_pathv) { | |
4435 | k = strv_extend(strv, *p); | |
4436 | if (k < 0) | |
4437 | break; | |
4438 | } | |
4439 | ||
4440 | return k; | |
8092a428 LP |
4441 | } |
4442 | ||
83096483 LP |
4443 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4444 | struct stat st; | |
4445 | ||
4446 | assert(d); | |
4447 | assert(de); | |
4448 | ||
4449 | if (de->d_type != DT_UNKNOWN) | |
4450 | return 0; | |
4451 | ||
4452 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4453 | return -errno; | |
4454 | ||
4455 | de->d_type = | |
4456 | S_ISREG(st.st_mode) ? DT_REG : | |
4457 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4458 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4459 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4460 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4461 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4462 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4463 | DT_UNKNOWN; | |
4464 | ||
4465 | return 0; | |
4466 | } | |
4467 | ||
4468 | int in_search_path(const char *path, char **search) { | |
893fa014 ZJS |
4469 | char **i; |
4470 | _cleanup_free_ char *parent = NULL; | |
83096483 LP |
4471 | int r; |
4472 | ||
9eb977db | 4473 | r = path_get_parent(path, &parent); |
83096483 LP |
4474 | if (r < 0) |
4475 | return r; | |
4476 | ||
893fa014 ZJS |
4477 | STRV_FOREACH(i, search) |
4478 | if (path_equal(parent, *i)) | |
4479 | return 1; | |
83096483 | 4480 | |
893fa014 | 4481 | return 0; |
83096483 LP |
4482 | } |
4483 | ||
034a2a52 | 4484 | int get_files_in_directory(const char *path, char ***list) { |
893fa014 ZJS |
4485 | _cleanup_closedir_ DIR *d = NULL; |
4486 | size_t bufsize = 0, n = 0; | |
4487 | _cleanup_strv_free_ char **l = NULL; | |
034a2a52 LP |
4488 | |
4489 | assert(path); | |
d60ef526 LP |
4490 | |
4491 | /* Returns all files in a directory in *list, and the number | |
4492 | * of files as return value. If list is NULL returns only the | |
893fa014 | 4493 | * number. */ |
034a2a52 LP |
4494 | |
4495 | d = opendir(path); | |
8ea913b2 LP |
4496 | if (!d) |
4497 | return -errno; | |
4498 | ||
034a2a52 | 4499 | for (;;) { |
7d5e9c0f | 4500 | struct dirent *de; |
034a2a52 | 4501 | |
3fd11280 FW |
4502 | errno = 0; |
4503 | de = readdir(d); | |
4504 | if (!de && errno != 0) | |
4505 | return -errno; | |
034a2a52 LP |
4506 | if (!de) |
4507 | break; | |
4508 | ||
4509 | dirent_ensure_type(d, de); | |
4510 | ||
4511 | if (!dirent_is_file(de)) | |
4512 | continue; | |
4513 | ||
d60ef526 | 4514 | if (list) { |
893fa014 ZJS |
4515 | /* one extra slot is needed for the terminating NULL */ |
4516 | if (!GREEDY_REALLOC(l, bufsize, n + 2)) | |
4517 | return -ENOMEM; | |
034a2a52 | 4518 | |
893fa014 ZJS |
4519 | l[n] = strdup(de->d_name); |
4520 | if (!l[n]) | |
4521 | return -ENOMEM; | |
034a2a52 | 4522 | |
893fa014 | 4523 | l[++n] = NULL; |
d60ef526 | 4524 | } else |
893fa014 | 4525 | n++; |
034a2a52 LP |
4526 | } |
4527 | ||
893fa014 ZJS |
4528 | if (list) { |
4529 | *list = l; | |
4530 | l = NULL; /* avoid freeing */ | |
4531 | } | |
034a2a52 | 4532 | |
893fa014 | 4533 | return n; |
034a2a52 LP |
4534 | } |
4535 | ||
b7def684 | 4536 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4537 | va_list ap; |
4538 | size_t l; | |
4539 | char *r, *p; | |
4540 | ||
4541 | va_start(ap, x); | |
4542 | ||
4543 | if (x) { | |
4544 | l = strlen(x); | |
4545 | ||
4546 | for (;;) { | |
4547 | const char *t; | |
040f18ea | 4548 | size_t n; |
911a4828 LP |
4549 | |
4550 | t = va_arg(ap, const char *); | |
4551 | if (!t) | |
4552 | break; | |
4553 | ||
040f18ea | 4554 | n = strlen(t); |
e98055de LN |
4555 | if (n > ((size_t) -1) - l) { |
4556 | va_end(ap); | |
040f18ea | 4557 | return NULL; |
e98055de | 4558 | } |
040f18ea LP |
4559 | |
4560 | l += n; | |
911a4828 LP |
4561 | } |
4562 | } else | |
4563 | l = 0; | |
4564 | ||
4565 | va_end(ap); | |
4566 | ||
4567 | r = new(char, l+1); | |
4568 | if (!r) | |
4569 | return NULL; | |
4570 | ||
4571 | if (x) { | |
4572 | p = stpcpy(r, x); | |
4573 | ||
4574 | va_start(ap, x); | |
4575 | ||
4576 | for (;;) { | |
4577 | const char *t; | |
4578 | ||
4579 | t = va_arg(ap, const char *); | |
4580 | if (!t) | |
4581 | break; | |
4582 | ||
4583 | p = stpcpy(p, t); | |
4584 | } | |
8ea913b2 LP |
4585 | |
4586 | va_end(ap); | |
911a4828 LP |
4587 | } else |
4588 | r[0] = 0; | |
4589 | ||
4590 | return r; | |
4591 | } | |
4592 | ||
b636465b | 4593 | bool is_main_thread(void) { |
ec202eae | 4594 | static thread_local int cached = 0; |
b636465b LP |
4595 | |
4596 | if (_unlikely_(cached == 0)) | |
4597 | cached = getpid() == gettid() ? 1 : -1; | |
4598 | ||
4599 | return cached > 0; | |
4600 | } | |
4601 | ||
94959f0f LP |
4602 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4603 | char *p, *s; | |
4604 | int r; | |
4605 | unsigned n, m; | |
4606 | ||
4607 | assert(ret); | |
4608 | ||
4609 | /* If it has a queue this is good enough for us */ | |
4610 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4611 | return -ENOMEM; | |
4612 | ||
4613 | r = access(p, F_OK); | |
4614 | free(p); | |
4615 | ||
4616 | if (r >= 0) { | |
4617 | *ret = d; | |
4618 | return 0; | |
4619 | } | |
4620 | ||
4621 | /* If it is a partition find the originating device */ | |
4622 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4623 | return -ENOMEM; | |
4624 | ||
4625 | r = access(p, F_OK); | |
4626 | free(p); | |
4627 | ||
4628 | if (r < 0) | |
4629 | return -ENOENT; | |
4630 | ||
4631 | /* Get parent dev_t */ | |
4632 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4633 | return -ENOMEM; | |
4634 | ||
4635 | r = read_one_line_file(p, &s); | |
4636 | free(p); | |
4637 | ||
4638 | if (r < 0) | |
4639 | return r; | |
4640 | ||
4641 | r = sscanf(s, "%u:%u", &m, &n); | |
4642 | free(s); | |
4643 | ||
4644 | if (r != 2) | |
4645 | return -EINVAL; | |
4646 | ||
4647 | /* Only return this if it is really good enough for us. */ | |
4648 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4649 | return -ENOMEM; | |
4650 | ||
4651 | r = access(p, F_OK); | |
4652 | free(p); | |
4653 | ||
4654 | if (r >= 0) { | |
4655 | *ret = makedev(m, n); | |
4656 | return 0; | |
4657 | } | |
4658 | ||
4659 | return -ENOENT; | |
4660 | } | |
4661 | ||
8d53b453 | 4662 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4663 | struct stat st; |
4664 | ||
4665 | assert(p); | |
4666 | ||
4667 | if (lstat(p, &st) < 0) | |
4668 | return -errno; | |
4669 | ||
4670 | return | |
8d53b453 | 4671 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4672 | (st.st_mode & S_ISVTX); |
4673 | } | |
94959f0f | 4674 | |
f41607a6 LP |
4675 | static const char *const ioprio_class_table[] = { |
4676 | [IOPRIO_CLASS_NONE] = "none", | |
4677 | [IOPRIO_CLASS_RT] = "realtime", | |
4678 | [IOPRIO_CLASS_BE] = "best-effort", | |
4679 | [IOPRIO_CLASS_IDLE] = "idle" | |
4680 | }; | |
4681 | ||
f8b69d1d | 4682 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4683 | |
4684 | static const char *const sigchld_code_table[] = { | |
4685 | [CLD_EXITED] = "exited", | |
4686 | [CLD_KILLED] = "killed", | |
4687 | [CLD_DUMPED] = "dumped", | |
4688 | [CLD_TRAPPED] = "trapped", | |
4689 | [CLD_STOPPED] = "stopped", | |
4690 | [CLD_CONTINUED] = "continued", | |
4691 | }; | |
4692 | ||
4693 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4694 | ||
4695 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4696 | [LOG_FAC(LOG_KERN)] = "kern", | |
4697 | [LOG_FAC(LOG_USER)] = "user", | |
4698 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4699 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4700 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4701 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4702 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4703 | [LOG_FAC(LOG_NEWS)] = "news", | |
4704 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4705 | [LOG_FAC(LOG_CRON)] = "cron", | |
4706 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4707 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4708 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4709 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4710 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4711 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4712 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4713 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4714 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4715 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4716 | }; | |
4717 | ||
f8b69d1d | 4718 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4719 | |
4720 | static const char *const log_level_table[] = { | |
4721 | [LOG_EMERG] = "emerg", | |
4722 | [LOG_ALERT] = "alert", | |
4723 | [LOG_CRIT] = "crit", | |
4724 | [LOG_ERR] = "err", | |
4725 | [LOG_WARNING] = "warning", | |
4726 | [LOG_NOTICE] = "notice", | |
4727 | [LOG_INFO] = "info", | |
4728 | [LOG_DEBUG] = "debug" | |
4729 | }; | |
4730 | ||
f8b69d1d | 4731 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4732 | |
4733 | static const char* const sched_policy_table[] = { | |
4734 | [SCHED_OTHER] = "other", | |
4735 | [SCHED_BATCH] = "batch", | |
4736 | [SCHED_IDLE] = "idle", | |
4737 | [SCHED_FIFO] = "fifo", | |
4738 | [SCHED_RR] = "rr" | |
4739 | }; | |
4740 | ||
f8b69d1d | 4741 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 | 4742 | |
517d56b1 | 4743 | static const char* const rlimit_table[_RLIMIT_MAX] = { |
f41607a6 LP |
4744 | [RLIMIT_CPU] = "LimitCPU", |
4745 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4746 | [RLIMIT_DATA] = "LimitDATA", | |
4747 | [RLIMIT_STACK] = "LimitSTACK", | |
4748 | [RLIMIT_CORE] = "LimitCORE", | |
4749 | [RLIMIT_RSS] = "LimitRSS", | |
4750 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4751 | [RLIMIT_AS] = "LimitAS", | |
4752 | [RLIMIT_NPROC] = "LimitNPROC", | |
4753 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4754 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4755 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4756 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4757 | [RLIMIT_NICE] = "LimitNICE", | |
4758 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4759 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4760 | }; | |
4761 | ||
4762 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4763 | ||
4764 | static const char* const ip_tos_table[] = { | |
4765 | [IPTOS_LOWDELAY] = "low-delay", | |
4766 | [IPTOS_THROUGHPUT] = "throughput", | |
4767 | [IPTOS_RELIABILITY] = "reliability", | |
4768 | [IPTOS_LOWCOST] = "low-cost", | |
4769 | }; | |
4770 | ||
f8b69d1d | 4771 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4772 | |
4e240ab0 | 4773 | static const char *const __signal_table[] = { |
f41607a6 LP |
4774 | [SIGHUP] = "HUP", |
4775 | [SIGINT] = "INT", | |
4776 | [SIGQUIT] = "QUIT", | |
4777 | [SIGILL] = "ILL", | |
4778 | [SIGTRAP] = "TRAP", | |
4779 | [SIGABRT] = "ABRT", | |
4780 | [SIGBUS] = "BUS", | |
4781 | [SIGFPE] = "FPE", | |
4782 | [SIGKILL] = "KILL", | |
4783 | [SIGUSR1] = "USR1", | |
4784 | [SIGSEGV] = "SEGV", | |
4785 | [SIGUSR2] = "USR2", | |
4786 | [SIGPIPE] = "PIPE", | |
4787 | [SIGALRM] = "ALRM", | |
4788 | [SIGTERM] = "TERM", | |
4789 | #ifdef SIGSTKFLT | |
4790 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4791 | #endif | |
4792 | [SIGCHLD] = "CHLD", | |
4793 | [SIGCONT] = "CONT", | |
4794 | [SIGSTOP] = "STOP", | |
4795 | [SIGTSTP] = "TSTP", | |
4796 | [SIGTTIN] = "TTIN", | |
4797 | [SIGTTOU] = "TTOU", | |
4798 | [SIGURG] = "URG", | |
4799 | [SIGXCPU] = "XCPU", | |
4800 | [SIGXFSZ] = "XFSZ", | |
4801 | [SIGVTALRM] = "VTALRM", | |
4802 | [SIGPROF] = "PROF", | |
4803 | [SIGWINCH] = "WINCH", | |
4804 | [SIGIO] = "IO", | |
4805 | [SIGPWR] = "PWR", | |
4806 | [SIGSYS] = "SYS" | |
4807 | }; | |
4808 | ||
4e240ab0 MS |
4809 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4810 | ||
4811 | const char *signal_to_string(int signo) { | |
ec202eae | 4812 | static thread_local char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1]; |
4e240ab0 MS |
4813 | const char *name; |
4814 | ||
4815 | name = __signal_to_string(signo); | |
4816 | if (name) | |
4817 | return name; | |
4818 | ||
4819 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
fa70beaa | 4820 | snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN); |
4e240ab0 | 4821 | else |
fa70beaa LP |
4822 | snprintf(buf, sizeof(buf), "%d", signo); |
4823 | ||
4e240ab0 MS |
4824 | return buf; |
4825 | } | |
4826 | ||
4827 | int signal_from_string(const char *s) { | |
4828 | int signo; | |
4829 | int offset = 0; | |
4830 | unsigned u; | |
4831 | ||
040f18ea | 4832 | signo = __signal_from_string(s); |
4e240ab0 MS |
4833 | if (signo > 0) |
4834 | return signo; | |
4835 | ||
4836 | if (startswith(s, "RTMIN+")) { | |
4837 | s += 6; | |
4838 | offset = SIGRTMIN; | |
4839 | } | |
4840 | if (safe_atou(s, &u) >= 0) { | |
4841 | signo = (int) u + offset; | |
4842 | if (signo > 0 && signo < _NSIG) | |
4843 | return signo; | |
4844 | } | |
4845 | return -1; | |
4846 | } | |
65457142 FC |
4847 | |
4848 | bool kexec_loaded(void) { | |
4849 | bool loaded = false; | |
4850 | char *s; | |
4851 | ||
4852 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
4853 | if (s[0] == '1') | |
4854 | loaded = true; | |
4855 | free(s); | |
4856 | } | |
4857 | return loaded; | |
4858 | } | |
fb9de93d LP |
4859 | |
4860 | int strdup_or_null(const char *a, char **b) { | |
4861 | char *c; | |
4862 | ||
4863 | assert(b); | |
4864 | ||
4865 | if (!a) { | |
4866 | *b = NULL; | |
4867 | return 0; | |
4868 | } | |
4869 | ||
4870 | c = strdup(a); | |
4871 | if (!c) | |
4872 | return -ENOMEM; | |
4873 | ||
4874 | *b = c; | |
4875 | return 0; | |
4876 | } | |
64685e0c | 4877 | |
87d2c1ff LP |
4878 | int prot_from_flags(int flags) { |
4879 | ||
4880 | switch (flags & O_ACCMODE) { | |
4881 | ||
4882 | case O_RDONLY: | |
4883 | return PROT_READ; | |
4884 | ||
4885 | case O_WRONLY: | |
4886 | return PROT_WRITE; | |
4887 | ||
4888 | case O_RDWR: | |
4889 | return PROT_READ|PROT_WRITE; | |
4890 | ||
4891 | default: | |
4892 | return -EINVAL; | |
4893 | } | |
7c99e0c1 | 4894 | } |
689b9a22 | 4895 | |
babfc091 | 4896 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 4897 | unsigned i; |
babfc091 LP |
4898 | |
4899 | static const struct { | |
4900 | const char *suffix; | |
4901 | off_t factor; | |
4902 | } table[] = { | |
32895bb3 LP |
4903 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
4904 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
4905 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
4906 | { "G", 1024ULL*1024ULL*1024ULL }, | |
4907 | { "M", 1024ULL*1024ULL }, | |
4908 | { "K", 1024ULL }, | |
4909 | }; | |
4910 | ||
4911 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
4912 | ||
4913 | if (t >= table[i].factor) { | |
4914 | snprintf(buf, l, | |
4915 | "%llu.%llu%s", | |
4916 | (unsigned long long) (t / table[i].factor), | |
4917 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
4918 | table[i].suffix); | |
4919 | ||
4920 | goto finish; | |
4921 | } | |
4922 | } | |
4923 | ||
4924 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
4925 | ||
4926 | finish: | |
4927 | buf[l-1] = 0; | |
4928 | return buf; | |
4929 | ||
4930 | } | |
55d7bfc1 LP |
4931 | |
4932 | void* memdup(const void *p, size_t l) { | |
4933 | void *r; | |
4934 | ||
4935 | assert(p); | |
4936 | ||
4937 | r = malloc(l); | |
4938 | if (!r) | |
4939 | return NULL; | |
4940 | ||
4941 | memcpy(r, p, l); | |
4942 | return r; | |
4943 | } | |
bb99a35a LP |
4944 | |
4945 | int fd_inc_sndbuf(int fd, size_t n) { | |
4946 | int r, value; | |
4947 | socklen_t l = sizeof(value); | |
4948 | ||
4949 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
92d75ca4 | 4950 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
4951 | return 0; |
4952 | ||
92d75ca4 LP |
4953 | /* If we have the privileges we will ignore the kernel limit. */ |
4954 | ||
bb99a35a | 4955 | value = (int) n; |
92d75ca4 LP |
4956 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) |
4957 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) | |
4958 | return -errno; | |
bb99a35a LP |
4959 | |
4960 | return 1; | |
4961 | } | |
4962 | ||
4963 | int fd_inc_rcvbuf(int fd, size_t n) { | |
4964 | int r, value; | |
4965 | socklen_t l = sizeof(value); | |
4966 | ||
4967 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
92d75ca4 | 4968 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
4969 | return 0; |
4970 | ||
92d75ca4 | 4971 | /* If we have the privileges we will ignore the kernel limit. */ |
bb99a35a | 4972 | |
92d75ca4 LP |
4973 | value = (int) n; |
4974 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) | |
4975 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) | |
4976 | return -errno; | |
bb99a35a LP |
4977 | return 1; |
4978 | } | |
6bb92a16 | 4979 | |
9bdc770c | 4980 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
4981 | pid_t parent_pid, agent_pid; |
4982 | int fd; | |
4983 | bool stdout_is_tty, stderr_is_tty; | |
4984 | unsigned n, i; | |
4985 | va_list ap; | |
4986 | char **l; | |
4987 | ||
4988 | assert(pid); | |
4989 | assert(path); | |
4990 | ||
4991 | parent_pid = getpid(); | |
4992 | ||
4993 | /* Spawns a temporary TTY agent, making sure it goes away when | |
4994 | * we go away */ | |
4995 | ||
4996 | agent_pid = fork(); | |
4997 | if (agent_pid < 0) | |
4998 | return -errno; | |
4999 | ||
5000 | if (agent_pid != 0) { | |
5001 | *pid = agent_pid; | |
5002 | return 0; | |
5003 | } | |
5004 | ||
5005 | /* In the child: | |
5006 | * | |
5007 | * Make sure the agent goes away when the parent dies */ | |
5008 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5009 | _exit(EXIT_FAILURE); | |
5010 | ||
5011 | /* Check whether our parent died before we were able | |
5012 | * to set the death signal */ | |
5013 | if (getppid() != parent_pid) | |
5014 | _exit(EXIT_SUCCESS); | |
5015 | ||
5016 | /* Don't leak fds to the agent */ | |
9bdc770c | 5017 | close_all_fds(except, n_except); |
6bb92a16 LP |
5018 | |
5019 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5020 | stderr_is_tty = isatty(STDERR_FILENO); | |
5021 | ||
5022 | if (!stdout_is_tty || !stderr_is_tty) { | |
5023 | /* Detach from stdout/stderr. and reopen | |
5024 | * /dev/tty for them. This is important to | |
5025 | * ensure that when systemctl is started via | |
5026 | * popen() or a similar call that expects to | |
5027 | * read EOF we actually do generate EOF and | |
5028 | * not delay this indefinitely by because we | |
5029 | * keep an unused copy of stdin around. */ | |
5030 | fd = open("/dev/tty", O_WRONLY); | |
5031 | if (fd < 0) { | |
5032 | log_error("Failed to open /dev/tty: %m"); | |
5033 | _exit(EXIT_FAILURE); | |
5034 | } | |
5035 | ||
5036 | if (!stdout_is_tty) | |
5037 | dup2(fd, STDOUT_FILENO); | |
5038 | ||
5039 | if (!stderr_is_tty) | |
5040 | dup2(fd, STDERR_FILENO); | |
5041 | ||
5042 | if (fd > 2) | |
5043 | close(fd); | |
5044 | } | |
5045 | ||
5046 | /* Count arguments */ | |
5047 | va_start(ap, path); | |
5048 | for (n = 0; va_arg(ap, char*); n++) | |
5049 | ; | |
5050 | va_end(ap); | |
5051 | ||
5052 | /* Allocate strv */ | |
5053 | l = alloca(sizeof(char *) * (n + 1)); | |
5054 | ||
5055 | /* Fill in arguments */ | |
5056 | va_start(ap, path); | |
5057 | for (i = 0; i <= n; i++) | |
5058 | l[i] = va_arg(ap, char*); | |
5059 | va_end(ap); | |
5060 | ||
5061 | execv(path, l); | |
5062 | _exit(EXIT_FAILURE); | |
5063 | } | |
68faf98c LP |
5064 | |
5065 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5066 | struct rlimit highest, fixed; | |
5067 | ||
5068 | assert(rlim); | |
5069 | ||
5070 | if (setrlimit(resource, rlim) >= 0) | |
5071 | return 0; | |
5072 | ||
5073 | if (errno != EPERM) | |
5074 | return -errno; | |
5075 | ||
5076 | /* So we failed to set the desired setrlimit, then let's try | |
5077 | * to get as close as we can */ | |
5078 | assert_se(getrlimit(resource, &highest) == 0); | |
5079 | ||
5080 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5081 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5082 | ||
5083 | if (setrlimit(resource, &fixed) < 0) | |
5084 | return -errno; | |
5085 | ||
5086 | return 0; | |
5087 | } | |
3d9a4122 | 5088 | |
ab94af92 | 5089 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
49aa47c7 LP |
5090 | _cleanup_fclose_ FILE *f = NULL; |
5091 | char *value = NULL; | |
ab94af92 | 5092 | int r; |
ab94af92 LP |
5093 | bool done = false; |
5094 | size_t l; | |
49aa47c7 | 5095 | const char *path; |
ab94af92 | 5096 | |
49aa47c7 | 5097 | assert(pid >= 0); |
ab94af92 LP |
5098 | assert(field); |
5099 | assert(_value); | |
5100 | ||
b68fa010 | 5101 | path = procfs_file_alloca(pid, "environ"); |
ab94af92 LP |
5102 | |
5103 | f = fopen(path, "re"); | |
5104 | if (!f) | |
5105 | return -errno; | |
5106 | ||
5107 | l = strlen(field); | |
5108 | r = 0; | |
5109 | ||
5110 | do { | |
5111 | char line[LINE_MAX]; | |
5112 | unsigned i; | |
5113 | ||
5114 | for (i = 0; i < sizeof(line)-1; i++) { | |
5115 | int c; | |
5116 | ||
5117 | c = getc(f); | |
5118 | if (_unlikely_(c == EOF)) { | |
5119 | done = true; | |
5120 | break; | |
5121 | } else if (c == 0) | |
5122 | break; | |
5123 | ||
5124 | line[i] = c; | |
5125 | } | |
5126 | line[i] = 0; | |
5127 | ||
5128 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5129 | value = strdup(line + l + 1); | |
49aa47c7 LP |
5130 | if (!value) |
5131 | return -ENOMEM; | |
ab94af92 LP |
5132 | |
5133 | r = 1; | |
5134 | break; | |
5135 | } | |
5136 | ||
5137 | } while (!done); | |
5138 | ||
49aa47c7 | 5139 | *_value = value; |
ab94af92 LP |
5140 | return r; |
5141 | } | |
d889a206 | 5142 | |
49dbfa7b LP |
5143 | bool is_valid_documentation_url(const char *url) { |
5144 | assert(url); | |
5145 | ||
5146 | if (startswith(url, "http://") && url[7]) | |
5147 | return true; | |
5148 | ||
5149 | if (startswith(url, "https://") && url[8]) | |
5150 | return true; | |
5151 | ||
5152 | if (startswith(url, "file:") && url[5]) | |
5153 | return true; | |
5154 | ||
5155 | if (startswith(url, "info:") && url[5]) | |
5156 | return true; | |
5157 | ||
5158 | if (startswith(url, "man:") && url[4]) | |
5159 | return true; | |
5160 | ||
5161 | return false; | |
5162 | } | |
9be346c9 HH |
5163 | |
5164 | bool in_initrd(void) { | |
73020ab2 | 5165 | static int saved = -1; |
825c6fe5 | 5166 | struct statfs s; |
8f33b5b8 | 5167 | |
825c6fe5 LP |
5168 | if (saved >= 0) |
5169 | return saved; | |
5170 | ||
5171 | /* We make two checks here: | |
5172 | * | |
5173 | * 1. the flag file /etc/initrd-release must exist | |
5174 | * 2. the root file system must be a memory file system | |
5175 | * | |
5176 | * The second check is extra paranoia, since misdetecting an | |
5177 | * initrd can have bad bad consequences due the initrd | |
5178 | * emptying when transititioning to the main systemd. | |
5179 | */ | |
5180 | ||
5181 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5182 | statfs("/", &s) >= 0 && | |
943aad8c | 5183 | is_temporary_fs(&s); |
9be346c9 | 5184 | |
8f33b5b8 | 5185 | return saved; |
9be346c9 | 5186 | } |
069cfc85 LP |
5187 | |
5188 | void warn_melody(void) { | |
e67f47e5 | 5189 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5190 | |
5191 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5192 | if (fd < 0) | |
5193 | return; | |
5194 | ||
040f18ea | 5195 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5196 | |
5197 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5198 | usleep(125*USEC_PER_MSEC); | |
5199 | ||
5200 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5201 | usleep(125*USEC_PER_MSEC); | |
5202 | ||
5203 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5204 | usleep(125*USEC_PER_MSEC); | |
5205 | ||
5206 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5207 | } |
cd3bd60a LP |
5208 | |
5209 | int make_console_stdio(void) { | |
5210 | int fd, r; | |
5211 | ||
5212 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5213 | ||
5214 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5215 | if (fd < 0) { | |
5216 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5217 | return fd; | |
5218 | } | |
5219 | ||
5220 | r = make_stdio(fd); | |
5221 | if (r < 0) { | |
5222 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5223 | return r; | |
5224 | } | |
5225 | ||
5226 | return 0; | |
5227 | } | |
7c5f152a LP |
5228 | |
5229 | int get_home_dir(char **_h) { | |
2cfbd749 | 5230 | struct passwd *p; |
7c5f152a | 5231 | const char *e; |
2cfbd749 | 5232 | char *h; |
7c5f152a | 5233 | uid_t u; |
7c5f152a LP |
5234 | |
5235 | assert(_h); | |
5236 | ||
5237 | /* Take the user specified one */ | |
5238 | e = getenv("HOME"); | |
5239 | if (e) { | |
5240 | h = strdup(e); | |
5241 | if (!h) | |
5242 | return -ENOMEM; | |
5243 | ||
5244 | *_h = h; | |
5245 | return 0; | |
5246 | } | |
5247 | ||
5248 | /* Hardcode home directory for root to avoid NSS */ | |
5249 | u = getuid(); | |
5250 | if (u == 0) { | |
5251 | h = strdup("/root"); | |
5252 | if (!h) | |
5253 | return -ENOMEM; | |
5254 | ||
5255 | *_h = h; | |
5256 | return 0; | |
5257 | } | |
5258 | ||
5259 | /* Check the database... */ | |
5260 | errno = 0; | |
5261 | p = getpwuid(u); | |
5262 | if (!p) | |
bcb161b0 | 5263 | return errno > 0 ? -errno : -ESRCH; |
7c5f152a LP |
5264 | |
5265 | if (!path_is_absolute(p->pw_dir)) | |
5266 | return -EINVAL; | |
5267 | ||
5268 | h = strdup(p->pw_dir); | |
5269 | if (!h) | |
5270 | return -ENOMEM; | |
5271 | ||
5272 | *_h = h; | |
5273 | return 0; | |
5274 | } | |
5275 | ||
2cfbd749 LP |
5276 | int get_shell(char **_s) { |
5277 | struct passwd *p; | |
5278 | const char *e; | |
5279 | char *s; | |
5280 | uid_t u; | |
5281 | ||
5282 | assert(_s); | |
5283 | ||
5284 | /* Take the user specified one */ | |
5285 | e = getenv("SHELL"); | |
5286 | if (e) { | |
5287 | s = strdup(e); | |
5288 | if (!s) | |
5289 | return -ENOMEM; | |
5290 | ||
5291 | *_s = s; | |
5292 | return 0; | |
5293 | } | |
5294 | ||
5295 | /* Hardcode home directory for root to avoid NSS */ | |
5296 | u = getuid(); | |
5297 | if (u == 0) { | |
5298 | s = strdup("/bin/sh"); | |
5299 | if (!s) | |
5300 | return -ENOMEM; | |
5301 | ||
5302 | *_s = s; | |
5303 | return 0; | |
5304 | } | |
5305 | ||
5306 | /* Check the database... */ | |
5307 | errno = 0; | |
5308 | p = getpwuid(u); | |
5309 | if (!p) | |
5310 | return errno > 0 ? -errno : -ESRCH; | |
5311 | ||
5312 | if (!path_is_absolute(p->pw_shell)) | |
5313 | return -EINVAL; | |
5314 | ||
5315 | s = strdup(p->pw_shell); | |
5316 | if (!s) | |
5317 | return -ENOMEM; | |
5318 | ||
5319 | *_s = s; | |
5320 | return 0; | |
5321 | } | |
5322 | ||
0b507b17 LP |
5323 | bool filename_is_safe(const char *p) { |
5324 | ||
5325 | if (isempty(p)) | |
5326 | return false; | |
5327 | ||
5328 | if (strchr(p, '/')) | |
5329 | return false; | |
5330 | ||
5331 | if (streq(p, ".")) | |
5332 | return false; | |
5333 | ||
5334 | if (streq(p, "..")) | |
5335 | return false; | |
5336 | ||
5337 | if (strlen(p) > FILENAME_MAX) | |
5338 | return false; | |
5339 | ||
5340 | return true; | |
5341 | } | |
5342 | ||
5343 | bool string_is_safe(const char *p) { | |
5344 | const char *t; | |
5345 | ||
5346 | assert(p); | |
5347 | ||
5348 | for (t = p; *t; t++) { | |
01539d6e | 5349 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5350 | return false; |
5351 | ||
011afa76 | 5352 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5353 | return false; |
5354 | } | |
5355 | ||
5356 | return true; | |
5357 | } | |
cfbc22ab | 5358 | |
ac4c8d6d ZJS |
5359 | /** |
5360 | * Check if a string contains control characters. | |
5361 | * Spaces and tabs are not considered control characters. | |
5362 | */ | |
4d1a6904 LP |
5363 | bool string_has_cc(const char *p) { |
5364 | const char *t; | |
5365 | ||
5366 | assert(p); | |
5367 | ||
5368 | for (t = p; *t; t++) | |
da2620a5 | 5369 | if (*t > 0 && *t < ' ' && *t != '\t') |
4d1a6904 LP |
5370 | return true; |
5371 | ||
5372 | return false; | |
5373 | } | |
5374 | ||
e884315e LP |
5375 | bool path_is_safe(const char *p) { |
5376 | ||
5377 | if (isempty(p)) | |
5378 | return false; | |
5379 | ||
5380 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5381 | return false; | |
5382 | ||
5383 | if (strlen(p) > PATH_MAX) | |
5384 | return false; | |
5385 | ||
5386 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5387 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5388 | return false; | |
5389 | ||
5390 | if (strstr(p, "//")) | |
5391 | return false; | |
5392 | ||
5393 | return true; | |
5394 | } | |
5395 | ||
a9e12476 KS |
5396 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5397 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5398 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5399 | size_t l, u, idx; |
5400 | const void *p; | |
5401 | int comparison; | |
5402 | ||
5403 | l = 0; | |
5404 | u = nmemb; | |
5405 | while (l < u) { | |
5406 | idx = (l + u) / 2; | |
5407 | p = (void *)(((const char *) base) + (idx * size)); | |
5408 | comparison = compar(key, p, arg); | |
5409 | if (comparison < 0) | |
5410 | u = idx; | |
5411 | else if (comparison > 0) | |
5412 | l = idx + 1; | |
5413 | else | |
5414 | return (void *)p; | |
5415 | } | |
5416 | return NULL; | |
5417 | } | |
09017585 MS |
5418 | |
5419 | bool is_locale_utf8(void) { | |
5420 | const char *set; | |
5421 | static int cached_answer = -1; | |
5422 | ||
5423 | if (cached_answer >= 0) | |
5424 | goto out; | |
5425 | ||
5426 | if (!setlocale(LC_ALL, "")) { | |
5427 | cached_answer = true; | |
5428 | goto out; | |
5429 | } | |
5430 | ||
5431 | set = nl_langinfo(CODESET); | |
5432 | if (!set) { | |
5433 | cached_answer = true; | |
5434 | goto out; | |
5435 | } | |
5436 | ||
f168c273 | 5437 | if (streq(set, "UTF-8")) { |
fee79e01 HH |
5438 | cached_answer = true; |
5439 | goto out; | |
5440 | } | |
5441 | ||
6cf2f1d9 HH |
5442 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
5443 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
5444 | set = setlocale(LC_CTYPE, NULL); |
5445 | if (!set) { | |
5446 | cached_answer = true; | |
5447 | goto out; | |
5448 | } | |
5449 | ||
6cf2f1d9 HH |
5450 | /* Check result, but ignore the result if C was set |
5451 | * explicitly. */ | |
5452 | cached_answer = | |
5453 | streq(set, "C") && | |
5454 | !getenv("LC_ALL") && | |
5455 | !getenv("LC_CTYPE") && | |
5456 | !getenv("LANG"); | |
fee79e01 | 5457 | |
09017585 | 5458 | out: |
6cf2f1d9 | 5459 | return (bool) cached_answer; |
09017585 | 5460 | } |
c339d977 MS |
5461 | |
5462 | const char *draw_special_char(DrawSpecialChar ch) { | |
5463 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
6b01f1d3 | 5464 | |
c339d977 | 5465 | /* UTF-8 */ { |
6b01f1d3 | 5466 | [DRAW_TREE_VERTICAL] = "\342\224\202 ", /* │ */ |
45a5ff0d MS |
5467 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ |
5468 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5469 | [DRAW_TREE_SPACE] = " ", /* */ |
6b01f1d3 LP |
5470 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243", /* ‣ */ |
5471 | [DRAW_BLACK_CIRCLE] = "\342\227\217", /* ● */ | |
5472 | [DRAW_ARROW] = "\342\206\222", /* → */ | |
c339d977 | 5473 | }, |
6b01f1d3 | 5474 | |
c339d977 | 5475 | /* ASCII fallback */ { |
6b01f1d3 | 5476 | [DRAW_TREE_VERTICAL] = "| ", |
45a5ff0d MS |
5477 | [DRAW_TREE_BRANCH] = "|-", |
5478 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5479 | [DRAW_TREE_SPACE] = " ", |
6b01f1d3 LP |
5480 | [DRAW_TRIANGULAR_BULLET] = ">", |
5481 | [DRAW_BLACK_CIRCLE] = "*", | |
5482 | [DRAW_ARROW] = "->", | |
c339d977 MS |
5483 | } |
5484 | }; | |
5485 | ||
5486 | return draw_table[!is_locale_utf8()][ch]; | |
5487 | } | |
409bc9c3 LP |
5488 | |
5489 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5490 | const char *f; | |
5491 | char *t, *r; | |
5492 | size_t l, old_len, new_len; | |
5493 | ||
5494 | assert(text); | |
5495 | assert(old_string); | |
5496 | assert(new_string); | |
5497 | ||
5498 | old_len = strlen(old_string); | |
5499 | new_len = strlen(new_string); | |
5500 | ||
5501 | l = strlen(text); | |
5502 | r = new(char, l+1); | |
5503 | if (!r) | |
5504 | return NULL; | |
5505 | ||
5506 | f = text; | |
5507 | t = r; | |
5508 | while (*f) { | |
5509 | char *a; | |
5510 | size_t d, nl; | |
5511 | ||
5512 | if (!startswith(f, old_string)) { | |
5513 | *(t++) = *(f++); | |
5514 | continue; | |
5515 | } | |
5516 | ||
5517 | d = t - r; | |
5518 | nl = l - old_len + new_len; | |
5519 | a = realloc(r, nl + 1); | |
5520 | if (!a) | |
5521 | goto oom; | |
5522 | ||
5523 | l = nl; | |
5524 | r = a; | |
5525 | t = r + d; | |
5526 | ||
5527 | t = stpcpy(t, new_string); | |
5528 | f += old_len; | |
5529 | } | |
5530 | ||
5531 | *t = 0; | |
5532 | return r; | |
5533 | ||
5534 | oom: | |
5535 | free(r); | |
5536 | return NULL; | |
5537 | } | |
e8bc0ea2 LP |
5538 | |
5539 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5540 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5541 | enum { |
5542 | STATE_OTHER, | |
5543 | STATE_ESCAPE, | |
5544 | STATE_BRACKET | |
5545 | } state = STATE_OTHER; | |
5546 | char *obuf = NULL; | |
5547 | size_t osz = 0, isz; | |
5548 | FILE *f; | |
5549 | ||
5550 | assert(ibuf); | |
5551 | assert(*ibuf); | |
5552 | ||
5553 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5554 | ||
5555 | isz = _isz ? *_isz : strlen(*ibuf); | |
5556 | ||
5557 | f = open_memstream(&obuf, &osz); | |
5558 | if (!f) | |
5559 | return NULL; | |
5560 | ||
5561 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5562 | ||
5563 | switch (state) { | |
5564 | ||
5565 | case STATE_OTHER: | |
5566 | if (i >= *ibuf + isz) /* EOT */ | |
5567 | break; | |
5568 | else if (*i == '\x1B') | |
5569 | state = STATE_ESCAPE; | |
5570 | else if (*i == '\t') | |
5571 | fputs(" ", f); | |
5572 | else | |
5573 | fputc(*i, f); | |
5574 | break; | |
5575 | ||
5576 | case STATE_ESCAPE: | |
5577 | if (i >= *ibuf + isz) { /* EOT */ | |
5578 | fputc('\x1B', f); | |
5579 | break; | |
5580 | } else if (*i == '[') { | |
5581 | state = STATE_BRACKET; | |
5582 | begin = i + 1; | |
5583 | } else { | |
5584 | fputc('\x1B', f); | |
5585 | fputc(*i, f); | |
5586 | state = STATE_OTHER; | |
5587 | } | |
5588 | ||
5589 | break; | |
5590 | ||
5591 | case STATE_BRACKET: | |
5592 | ||
5593 | if (i >= *ibuf + isz || /* EOT */ | |
5594 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5595 | fputc('\x1B', f); | |
5596 | fputc('[', f); | |
5597 | state = STATE_OTHER; | |
5598 | i = begin-1; | |
5599 | } else if (*i == 'm') | |
5600 | state = STATE_OTHER; | |
5601 | break; | |
5602 | } | |
5603 | } | |
5604 | ||
5605 | if (ferror(f)) { | |
5606 | fclose(f); | |
5607 | free(obuf); | |
5608 | return NULL; | |
5609 | } | |
5610 | ||
5611 | fclose(f); | |
5612 | ||
5613 | free(*ibuf); | |
5614 | *ibuf = obuf; | |
5615 | ||
5616 | if (_isz) | |
5617 | *_isz = osz; | |
5618 | ||
5619 | return obuf; | |
5620 | } | |
240dbaa4 LP |
5621 | |
5622 | int on_ac_power(void) { | |
5623 | bool found_offline = false, found_online = false; | |
5624 | _cleanup_closedir_ DIR *d = NULL; | |
5625 | ||
5626 | d = opendir("/sys/class/power_supply"); | |
5627 | if (!d) | |
5628 | return -errno; | |
5629 | ||
5630 | for (;;) { | |
5631 | struct dirent *de; | |
240dbaa4 LP |
5632 | _cleanup_close_ int fd = -1, device = -1; |
5633 | char contents[6]; | |
5634 | ssize_t n; | |
240dbaa4 | 5635 | |
3fd11280 FW |
5636 | errno = 0; |
5637 | de = readdir(d); | |
5638 | if (!de && errno != 0) | |
5639 | return -errno; | |
240dbaa4 LP |
5640 | |
5641 | if (!de) | |
5642 | break; | |
5643 | ||
5644 | if (ignore_file(de->d_name)) | |
5645 | continue; | |
5646 | ||
5647 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5648 | if (device < 0) { | |
5649 | if (errno == ENOENT || errno == ENOTDIR) | |
5650 | continue; | |
5651 | ||
5652 | return -errno; | |
5653 | } | |
5654 | ||
5655 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5656 | if (fd < 0) { | |
5657 | if (errno == ENOENT) | |
5658 | continue; | |
5659 | ||
5660 | return -errno; | |
5661 | } | |
5662 | ||
5663 | n = read(fd, contents, sizeof(contents)); | |
5664 | if (n < 0) | |
5665 | return -errno; | |
5666 | ||
5667 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5668 | continue; | |
5669 | ||
03e334a1 | 5670 | safe_close(fd); |
240dbaa4 LP |
5671 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
5672 | if (fd < 0) { | |
5673 | if (errno == ENOENT) | |
5674 | continue; | |
5675 | ||
5676 | return -errno; | |
5677 | } | |
5678 | ||
5679 | n = read(fd, contents, sizeof(contents)); | |
5680 | if (n < 0) | |
5681 | return -errno; | |
5682 | ||
5683 | if (n != 2 || contents[1] != '\n') | |
5684 | return -EIO; | |
5685 | ||
5686 | if (contents[0] == '1') { | |
5687 | found_online = true; | |
5688 | break; | |
5689 | } else if (contents[0] == '0') | |
5690 | found_offline = true; | |
5691 | else | |
5692 | return -EIO; | |
5693 | } | |
5694 | ||
5695 | return found_online || !found_offline; | |
5696 | } | |
fabe5c0e | 5697 | |
4cf7ea55 | 5698 | static int search_and_fopen_internal(const char *path, const char *mode, const char *root, char **search, FILE **_f) { |
fabe5c0e LP |
5699 | char **i; |
5700 | ||
5701 | assert(path); | |
5702 | assert(mode); | |
5703 | assert(_f); | |
5704 | ||
4cf7ea55 | 5705 | if (!path_strv_canonicalize_absolute_uniq(search, root)) |
fabe5c0e LP |
5706 | return -ENOMEM; |
5707 | ||
5708 | STRV_FOREACH(i, search) { | |
5709 | _cleanup_free_ char *p = NULL; | |
5710 | FILE *f; | |
5711 | ||
5712 | p = strjoin(*i, "/", path, NULL); | |
5713 | if (!p) | |
5714 | return -ENOMEM; | |
5715 | ||
5716 | f = fopen(p, mode); | |
5717 | if (f) { | |
5718 | *_f = f; | |
5719 | return 0; | |
5720 | } | |
5721 | ||
5722 | if (errno != ENOENT) | |
5723 | return -errno; | |
5724 | } | |
5725 | ||
5726 | return -ENOENT; | |
5727 | } | |
5728 | ||
4cf7ea55 | 5729 | int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f) { |
fabe5c0e LP |
5730 | _cleanup_strv_free_ char **copy = NULL; |
5731 | ||
5732 | assert(path); | |
5733 | assert(mode); | |
5734 | assert(_f); | |
5735 | ||
5736 | if (path_is_absolute(path)) { | |
5737 | FILE *f; | |
5738 | ||
5739 | f = fopen(path, mode); | |
5740 | if (f) { | |
5741 | *_f = f; | |
5742 | return 0; | |
5743 | } | |
5744 | ||
5745 | return -errno; | |
5746 | } | |
5747 | ||
5748 | copy = strv_copy((char**) search); | |
5749 | if (!copy) | |
5750 | return -ENOMEM; | |
5751 | ||
4cf7ea55 | 5752 | return search_and_fopen_internal(path, mode, root, copy, _f); |
fabe5c0e LP |
5753 | } |
5754 | ||
4cf7ea55 | 5755 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f) { |
fabe5c0e LP |
5756 | _cleanup_strv_free_ char **s = NULL; |
5757 | ||
5758 | if (path_is_absolute(path)) { | |
5759 | FILE *f; | |
5760 | ||
5761 | f = fopen(path, mode); | |
5762 | if (f) { | |
5763 | *_f = f; | |
5764 | return 0; | |
5765 | } | |
5766 | ||
5767 | return -errno; | |
5768 | } | |
5769 | ||
5770 | s = strv_split_nulstr(search); | |
5771 | if (!s) | |
5772 | return -ENOMEM; | |
5773 | ||
4cf7ea55 | 5774 | return search_and_fopen_internal(path, mode, root, s, _f); |
fabe5c0e | 5775 | } |
c17ec25e | 5776 | |
66e35261 LP |
5777 | char *strextend(char **x, ...) { |
5778 | va_list ap; | |
5779 | size_t f, l; | |
5780 | char *r, *p; | |
5781 | ||
5782 | assert(x); | |
5783 | ||
5784 | l = f = *x ? strlen(*x) : 0; | |
5785 | ||
5786 | va_start(ap, x); | |
5787 | for (;;) { | |
5788 | const char *t; | |
5789 | size_t n; | |
5790 | ||
5791 | t = va_arg(ap, const char *); | |
5792 | if (!t) | |
5793 | break; | |
5794 | ||
5795 | n = strlen(t); | |
5796 | if (n > ((size_t) -1) - l) { | |
5797 | va_end(ap); | |
5798 | return NULL; | |
5799 | } | |
5800 | ||
5801 | l += n; | |
5802 | } | |
5803 | va_end(ap); | |
5804 | ||
5805 | r = realloc(*x, l+1); | |
5806 | if (!r) | |
5807 | return NULL; | |
5808 | ||
5809 | p = r + f; | |
5810 | ||
5811 | va_start(ap, x); | |
5812 | for (;;) { | |
5813 | const char *t; | |
5814 | ||
5815 | t = va_arg(ap, const char *); | |
5816 | if (!t) | |
5817 | break; | |
5818 | ||
5819 | p = stpcpy(p, t); | |
5820 | } | |
5821 | va_end(ap); | |
5822 | ||
5823 | *p = 0; | |
5824 | *x = r; | |
5825 | ||
5826 | return r + l; | |
5827 | } | |
9a17484d LP |
5828 | |
5829 | char *strrep(const char *s, unsigned n) { | |
5830 | size_t l; | |
5831 | char *r, *p; | |
5832 | unsigned i; | |
5833 | ||
5834 | assert(s); | |
5835 | ||
5836 | l = strlen(s); | |
5837 | p = r = malloc(l * n + 1); | |
5838 | if (!r) | |
5839 | return NULL; | |
5840 | ||
5841 | for (i = 0; i < n; i++) | |
5842 | p = stpcpy(p, s); | |
5843 | ||
5844 | *p = 0; | |
5845 | return r; | |
5846 | } | |
392d5b37 | 5847 | |
ca2d3784 ZJS |
5848 | void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) { |
5849 | size_t a, newalloc; | |
392d5b37 LP |
5850 | void *q; |
5851 | ||
98088803 | 5852 | assert(p); |
e93c33d4 SL |
5853 | assert(allocated); |
5854 | ||
392d5b37 LP |
5855 | if (*allocated >= need) |
5856 | return *p; | |
5857 | ||
ca2d3784 ZJS |
5858 | newalloc = MAX(need * 2, 64u / size); |
5859 | a = newalloc * size; | |
98088803 LP |
5860 | |
5861 | /* check for overflows */ | |
ca2d3784 | 5862 | if (a < size * need) |
98088803 LP |
5863 | return NULL; |
5864 | ||
392d5b37 LP |
5865 | q = realloc(*p, a); |
5866 | if (!q) | |
5867 | return NULL; | |
5868 | ||
5869 | *p = q; | |
ca2d3784 | 5870 | *allocated = newalloc; |
392d5b37 LP |
5871 | return q; |
5872 | } | |
aa96c6cb | 5873 | |
ca2d3784 | 5874 | void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) { |
98088803 | 5875 | size_t prev; |
4545a231 DH |
5876 | uint8_t *q; |
5877 | ||
98088803 LP |
5878 | assert(p); |
5879 | assert(allocated); | |
5880 | ||
5881 | prev = *allocated; | |
5882 | ||
ca2d3784 | 5883 | q = greedy_realloc(p, allocated, need, size); |
4545a231 DH |
5884 | if (!q) |
5885 | return NULL; | |
5886 | ||
5887 | if (*allocated > prev) | |
ca2d3784 | 5888 | memzero(q + prev * size, (*allocated - prev) * size); |
4545a231 DH |
5889 | |
5890 | return q; | |
5891 | } | |
5892 | ||
aa96c6cb LP |
5893 | bool id128_is_valid(const char *s) { |
5894 | size_t i, l; | |
5895 | ||
5896 | l = strlen(s); | |
5897 | if (l == 32) { | |
5898 | ||
5899 | /* Simple formatted 128bit hex string */ | |
5900 | ||
5901 | for (i = 0; i < l; i++) { | |
5902 | char c = s[i]; | |
5903 | ||
5904 | if (!(c >= '0' && c <= '9') && | |
5905 | !(c >= 'a' && c <= 'z') && | |
5906 | !(c >= 'A' && c <= 'Z')) | |
5907 | return false; | |
5908 | } | |
5909 | ||
5910 | } else if (l == 36) { | |
5911 | ||
5912 | /* Formatted UUID */ | |
5913 | ||
5914 | for (i = 0; i < l; i++) { | |
5915 | char c = s[i]; | |
5916 | ||
5917 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
5918 | if (c != '-') | |
5919 | return false; | |
5920 | } else { | |
5921 | if (!(c >= '0' && c <= '9') && | |
5922 | !(c >= 'a' && c <= 'z') && | |
5923 | !(c >= 'A' && c <= 'Z')) | |
5924 | return false; | |
5925 | } | |
5926 | } | |
5927 | ||
5928 | } else | |
5929 | return false; | |
5930 | ||
5931 | return true; | |
5932 | } | |
7085053a | 5933 | |
d4ac85c6 LP |
5934 | int split_pair(const char *s, const char *sep, char **l, char **r) { |
5935 | char *x, *a, *b; | |
5936 | ||
5937 | assert(s); | |
5938 | assert(sep); | |
5939 | assert(l); | |
5940 | assert(r); | |
5941 | ||
5942 | if (isempty(sep)) | |
5943 | return -EINVAL; | |
5944 | ||
5945 | x = strstr(s, sep); | |
5946 | if (!x) | |
5947 | return -EINVAL; | |
5948 | ||
5949 | a = strndup(s, x - s); | |
5950 | if (!a) | |
5951 | return -ENOMEM; | |
5952 | ||
5953 | b = strdup(x + strlen(sep)); | |
5954 | if (!b) { | |
5955 | free(a); | |
5956 | return -ENOMEM; | |
5957 | } | |
5958 | ||
5959 | *l = a; | |
5960 | *r = b; | |
5961 | ||
5962 | return 0; | |
5963 | } | |
295edddf | 5964 | |
74df0fca | 5965 | int shall_restore_state(void) { |
059cb385 | 5966 | _cleanup_free_ char *line = NULL; |
295edddf | 5967 | char *w, *state; |
295edddf | 5968 | size_t l; |
74df0fca | 5969 | int r; |
295edddf | 5970 | |
74df0fca LP |
5971 | r = proc_cmdline(&line); |
5972 | if (r < 0) | |
5973 | return r; | |
5974 | if (r == 0) /* Container ... */ | |
5975 | return 1; | |
295edddf | 5976 | |
059cb385 | 5977 | r = 1; |
74df0fca | 5978 | |
059cb385 LP |
5979 | FOREACH_WORD_QUOTED(w, l, line, state) { |
5980 | const char *e; | |
5981 | char n[l+1]; | |
5982 | int k; | |
5983 | ||
5984 | memcpy(n, w, l); | |
5985 | n[l] = 0; | |
5986 | ||
5987 | e = startswith(n, "systemd.restore_state="); | |
5988 | if (!e) | |
5989 | continue; | |
5990 | ||
5991 | k = parse_boolean(e); | |
5992 | if (k >= 0) | |
5993 | r = k; | |
5994 | } | |
5995 | ||
5996 | return r; | |
74df0fca LP |
5997 | } |
5998 | ||
5999 | int proc_cmdline(char **ret) { | |
6000 | int r; | |
6001 | ||
6002 | if (detect_container(NULL) > 0) { | |
39883f62 | 6003 | char *buf = NULL, *p; |
02bb6cda LP |
6004 | size_t sz = 0; |
6005 | ||
6006 | r = read_full_file("/proc/1/cmdline", &buf, &sz); | |
6007 | if (r < 0) | |
6008 | return r; | |
6009 | ||
6010 | for (p = buf; p + 1 < buf + sz; p++) | |
6011 | if (*p == 0) | |
6012 | *p = ' '; | |
6013 | ||
059cb385 | 6014 | *p = 0; |
02bb6cda LP |
6015 | *ret = buf; |
6016 | return 1; | |
295edddf TG |
6017 | } |
6018 | ||
74df0fca LP |
6019 | r = read_one_line_file("/proc/cmdline", ret); |
6020 | if (r < 0) | |
6021 | return r; | |
295edddf | 6022 | |
74df0fca | 6023 | return 1; |
295edddf | 6024 | } |
bc9fd78c | 6025 | |
059cb385 | 6026 | int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) { |
141a79f4 ZJS |
6027 | _cleanup_free_ char *line = NULL; |
6028 | char *w, *state; | |
6029 | size_t l; | |
6030 | int r; | |
6031 | ||
059cb385 LP |
6032 | assert(parse_item); |
6033 | ||
141a79f4 ZJS |
6034 | r = proc_cmdline(&line); |
6035 | if (r < 0) | |
6036 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); | |
6037 | if (r <= 0) | |
6038 | return 0; | |
6039 | ||
6040 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
059cb385 | 6041 | char word[l+1], *value; |
141a79f4 | 6042 | |
059cb385 LP |
6043 | memcpy(word, w, l); |
6044 | word[l] = 0; | |
141a79f4 | 6045 | |
059cb385 LP |
6046 | /* Filter out arguments that are intended only for the |
6047 | * initrd */ | |
6048 | if (!in_initrd() && startswith(word, "rd.")) | |
6049 | continue; | |
6050 | ||
6051 | value = strchr(word, '='); | |
6052 | if (value) | |
6053 | *(value++) = 0; | |
6054 | ||
6055 | r = parse_item(word, value); | |
6056 | if (r < 0) | |
141a79f4 | 6057 | return r; |
141a79f4 ZJS |
6058 | } |
6059 | ||
6060 | return 0; | |
6061 | } | |
6062 | ||
bc9fd78c LP |
6063 | int container_get_leader(const char *machine, pid_t *pid) { |
6064 | _cleanup_free_ char *s = NULL, *class = NULL; | |
6065 | const char *p; | |
6066 | pid_t leader; | |
6067 | int r; | |
6068 | ||
6069 | assert(machine); | |
6070 | assert(pid); | |
6071 | ||
6072 | p = strappenda("/run/systemd/machines/", machine); | |
6073 | r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); | |
6074 | if (r == -ENOENT) | |
6075 | return -EHOSTDOWN; | |
6076 | if (r < 0) | |
6077 | return r; | |
6078 | if (!s) | |
6079 | return -EIO; | |
6080 | ||
6081 | if (!streq_ptr(class, "container")) | |
6082 | return -EIO; | |
6083 | ||
6084 | r = parse_pid(s, &leader); | |
6085 | if (r < 0) | |
6086 | return r; | |
6087 | if (leader <= 1) | |
6088 | return -EIO; | |
6089 | ||
6090 | *pid = leader; | |
6091 | return 0; | |
6092 | } | |
6093 | ||
878cd7e9 LP |
6094 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd) { |
6095 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1; | |
359a06aa | 6096 | int rfd = -1; |
bc9fd78c LP |
6097 | |
6098 | assert(pid >= 0); | |
bc9fd78c | 6099 | |
878cd7e9 LP |
6100 | if (mntns_fd) { |
6101 | const char *mntns; | |
a4475f57 | 6102 | |
878cd7e9 LP |
6103 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
6104 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6105 | if (mntnsfd < 0) | |
6106 | return -errno; | |
6107 | } | |
bc9fd78c | 6108 | |
878cd7e9 LP |
6109 | if (pidns_fd) { |
6110 | const char *pidns; | |
6111 | ||
6112 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
6113 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6114 | if (pidnsfd < 0) | |
6115 | return -errno; | |
6116 | } | |
6117 | ||
6118 | if (netns_fd) { | |
6119 | const char *netns; | |
6120 | ||
6121 | netns = procfs_file_alloca(pid, "ns/net"); | |
6122 | netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6123 | if (netnsfd < 0) | |
6124 | return -errno; | |
6125 | } | |
6126 | ||
6127 | if (root_fd) { | |
6128 | const char *root; | |
6129 | ||
6130 | root = procfs_file_alloca(pid, "root"); | |
6131 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
6132 | if (rfd < 0) | |
6133 | return -errno; | |
6134 | } | |
6135 | ||
6136 | if (pidns_fd) | |
6137 | *pidns_fd = pidnsfd; | |
bc9fd78c | 6138 | |
878cd7e9 LP |
6139 | if (mntns_fd) |
6140 | *mntns_fd = mntnsfd; | |
6141 | ||
6142 | if (netns_fd) | |
6143 | *netns_fd = netnsfd; | |
6144 | ||
6145 | if (root_fd) | |
6146 | *root_fd = rfd; | |
6147 | ||
6148 | pidnsfd = mntnsfd = netnsfd = -1; | |
bc9fd78c LP |
6149 | |
6150 | return 0; | |
6151 | } | |
6152 | ||
878cd7e9 | 6153 | int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd) { |
bc9fd78c | 6154 | |
878cd7e9 LP |
6155 | if (pidns_fd >= 0) |
6156 | if (setns(pidns_fd, CLONE_NEWPID) < 0) | |
6157 | return -errno; | |
a4475f57 | 6158 | |
878cd7e9 LP |
6159 | if (mntns_fd >= 0) |
6160 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
6161 | return -errno; | |
bc9fd78c | 6162 | |
878cd7e9 LP |
6163 | if (netns_fd >= 0) |
6164 | if (setns(netns_fd, CLONE_NEWNET) < 0) | |
6165 | return -errno; | |
bc9fd78c | 6166 | |
878cd7e9 LP |
6167 | if (root_fd >= 0) { |
6168 | if (fchdir(root_fd) < 0) | |
6169 | return -errno; | |
6170 | ||
6171 | if (chroot(".") < 0) | |
6172 | return -errno; | |
6173 | } | |
bc9fd78c | 6174 | |
5e2b3214 LP |
6175 | if (setresgid(0, 0, 0) < 0) |
6176 | return -errno; | |
6177 | ||
878cd7e9 LP |
6178 | if (setgroups(0, NULL) < 0) |
6179 | return -errno; | |
6180 | ||
5e2b3214 LP |
6181 | if (setresuid(0, 0, 0) < 0) |
6182 | return -errno; | |
6183 | ||
bc9fd78c LP |
6184 | return 0; |
6185 | } | |
bf108e55 | 6186 | |
9f5650ae LP |
6187 | bool pid_is_unwaited(pid_t pid) { |
6188 | /* Checks whether a PID is still valid at all, including a zombie */ | |
6189 | ||
bf108e55 LP |
6190 | if (pid <= 0) |
6191 | return false; | |
6192 | ||
6193 | if (kill(pid, 0) >= 0) | |
6194 | return true; | |
6195 | ||
6196 | return errno != ESRCH; | |
6197 | } | |
eff05270 | 6198 | |
9f5650ae LP |
6199 | bool pid_is_alive(pid_t pid) { |
6200 | int r; | |
6201 | ||
6202 | /* Checks whether a PID is still valid and not a zombie */ | |
6203 | ||
6204 | if (pid <= 0) | |
6205 | return false; | |
6206 | ||
6207 | r = get_process_state(pid); | |
6208 | if (r == -ENOENT || r == 'Z') | |
6209 | return false; | |
6210 | ||
6211 | return true; | |
6212 | } | |
6213 | ||
eff05270 LP |
6214 | int getpeercred(int fd, struct ucred *ucred) { |
6215 | socklen_t n = sizeof(struct ucred); | |
6216 | struct ucred u; | |
6217 | int r; | |
6218 | ||
6219 | assert(fd >= 0); | |
6220 | assert(ucred); | |
6221 | ||
6222 | r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &u, &n); | |
6223 | if (r < 0) | |
6224 | return -errno; | |
6225 | ||
6226 | if (n != sizeof(struct ucred)) | |
6227 | return -EIO; | |
6228 | ||
6229 | /* Check if the data is actually useful and not suppressed due | |
6230 | * to namespacing issues */ | |
6231 | if (u.pid <= 0) | |
6232 | return -ENODATA; | |
6233 | ||
6234 | *ucred = u; | |
6235 | return 0; | |
6236 | } | |
6237 | ||
6238 | int getpeersec(int fd, char **ret) { | |
6239 | socklen_t n = 64; | |
6240 | char *s; | |
6241 | int r; | |
6242 | ||
6243 | assert(fd >= 0); | |
6244 | assert(ret); | |
6245 | ||
6246 | s = new0(char, n); | |
6247 | if (!s) | |
6248 | return -ENOMEM; | |
6249 | ||
6250 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6251 | if (r < 0) { | |
6252 | free(s); | |
6253 | ||
6254 | if (errno != ERANGE) | |
6255 | return -errno; | |
6256 | ||
6257 | s = new0(char, n); | |
6258 | if (!s) | |
6259 | return -ENOMEM; | |
6260 | ||
6261 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6262 | if (r < 0) { | |
6263 | free(s); | |
6264 | return -errno; | |
6265 | } | |
6266 | } | |
6267 | ||
ae98841e LP |
6268 | if (isempty(s)) { |
6269 | free(s); | |
6270 | return -ENOTSUP; | |
6271 | } | |
6272 | ||
eff05270 LP |
6273 | *ret = s; |
6274 | return 0; | |
6275 | } | |
8e33886e | 6276 | |
0f010ef2 | 6277 | /* This is much like like mkostemp() but is subject to umask(). */ |
65b3903f | 6278 | int mkostemp_safe(char *pattern, int flags) { |
2d5bdf5b | 6279 | _cleanup_umask_ mode_t u; |
0f010ef2 | 6280 | int fd; |
65b3903f | 6281 | |
d37a91e8 | 6282 | assert(pattern); |
65b3903f | 6283 | |
2d5bdf5b LP |
6284 | u = umask(077); |
6285 | ||
0f010ef2 ZJS |
6286 | fd = mkostemp(pattern, flags); |
6287 | if (fd < 0) | |
6288 | return -errno; | |
65b3903f | 6289 | |
0f010ef2 | 6290 | return fd; |
65b3903f ZJS |
6291 | } |
6292 | ||
8e33886e | 6293 | int open_tmpfile(const char *path, int flags) { |
8e33886e | 6294 | char *p; |
a6afc4ae LP |
6295 | int fd; |
6296 | ||
6297 | assert(path); | |
8e33886e ZJS |
6298 | |
6299 | #ifdef O_TMPFILE | |
7736202c LP |
6300 | /* Try O_TMPFILE first, if it is supported */ |
6301 | fd = open(path, flags|O_TMPFILE, S_IRUSR|S_IWUSR); | |
8e33886e ZJS |
6302 | if (fd >= 0) |
6303 | return fd; | |
6304 | #endif | |
7736202c LP |
6305 | |
6306 | /* Fall back to unguessable name + unlinking */ | |
8e33886e ZJS |
6307 | p = strappenda(path, "/systemd-tmp-XXXXXX"); |
6308 | ||
a6afc4ae | 6309 | fd = mkostemp_safe(p, flags); |
8e33886e | 6310 | if (fd < 0) |
65b3903f | 6311 | return fd; |
8e33886e ZJS |
6312 | |
6313 | unlink(p); | |
6314 | return fd; | |
6315 | } | |
fdb9161c LP |
6316 | |
6317 | int fd_warn_permissions(const char *path, int fd) { | |
6318 | struct stat st; | |
6319 | ||
6320 | if (fstat(fd, &st) < 0) | |
6321 | return -errno; | |
6322 | ||
6323 | if (st.st_mode & 0111) | |
6324 | log_warning("Configuration file %s is marked executable. Please remove executable permission bits. Proceeding anyway.", path); | |
6325 | ||
6326 | if (st.st_mode & 0002) | |
6327 | log_warning("Configuration file %s is marked world-writable. Please remove world writability permission bits. Proceeding anyway.", path); | |
6328 | ||
6329 | if (getpid() == 1 && (st.st_mode & 0044) != 0044) | |
6330 | 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); | |
6331 | ||
6332 | return 0; | |
6333 | } | |
6afc95b7 | 6334 | |
ac45f971 | 6335 | unsigned long personality_from_string(const char *p) { |
6afc95b7 LP |
6336 | |
6337 | /* Parse a personality specifier. We introduce our own | |
6338 | * identifiers that indicate specific ABIs, rather than just | |
6339 | * hints regarding the register size, since we want to keep | |
6340 | * things open for multiple locally supported ABIs for the | |
6341 | * same register size. We try to reuse the ABI identifiers | |
6342 | * used by libseccomp. */ | |
6343 | ||
6344 | #if defined(__x86_64__) | |
6345 | ||
6346 | if (streq(p, "x86")) | |
6347 | return PER_LINUX32; | |
6348 | ||
6349 | if (streq(p, "x86-64")) | |
6350 | return PER_LINUX; | |
6351 | ||
6352 | #elif defined(__i386__) | |
6353 | ||
6354 | if (streq(p, "x86")) | |
6355 | return PER_LINUX; | |
6356 | #endif | |
6357 | ||
6358 | /* personality(7) documents that 0xffffffffUL is used for | |
6359 | * querying the current personality, hence let's use that here | |
6360 | * as error indicator. */ | |
6361 | return 0xffffffffUL; | |
6362 | } | |
ac45f971 LP |
6363 | |
6364 | const char* personality_to_string(unsigned long p) { | |
6365 | ||
6366 | #if defined(__x86_64__) | |
6367 | ||
6368 | if (p == PER_LINUX32) | |
6369 | return "x86"; | |
6370 | ||
6371 | if (p == PER_LINUX) | |
6372 | return "x86-64"; | |
6373 | ||
6374 | #elif defined(__i386__) | |
6375 | ||
6376 | if (p == PER_LINUX) | |
6377 | return "x86"; | |
6378 | #endif | |
6379 | ||
6380 | return NULL; | |
6381 | } | |
1c231f56 LP |
6382 | |
6383 | uint64_t physical_memory(void) { | |
6384 | long mem; | |
6385 | ||
6386 | /* We return this as uint64_t in case we are running as 32bit | |
6387 | * process on a 64bit kernel with huge amounts of memory */ | |
6388 | ||
6389 | mem = sysconf(_SC_PHYS_PAGES); | |
6390 | assert(mem > 0); | |
6391 | ||
6392 | return (uint64_t) mem * (uint64_t) page_size(); | |
6393 | } | |
6db615c1 LP |
6394 | |
6395 | char* mount_test_option(const char *haystack, const char *needle) { | |
6396 | ||
6397 | struct mntent me = { | |
6398 | .mnt_opts = (char*) haystack | |
6399 | }; | |
6400 | ||
6401 | assert(needle); | |
6402 | ||
6403 | /* Like glibc's hasmntopt(), but works on a string, not a | |
6404 | * struct mntent */ | |
6405 | ||
6406 | if (!haystack) | |
6407 | return NULL; | |
6408 | ||
6409 | return hasmntopt(&me, needle); | |
6410 | } | |
29bfbcd6 LP |
6411 | |
6412 | void hexdump(FILE *f, const void *p, size_t s) { | |
6413 | const uint8_t *b = p; | |
6414 | unsigned n = 0; | |
6415 | ||
6416 | assert(s == 0 || b); | |
6417 | ||
6418 | while (s > 0) { | |
6419 | size_t i; | |
6420 | ||
6421 | fprintf(f, "%04x ", n); | |
6422 | ||
6423 | for (i = 0; i < 16; i++) { | |
6424 | ||
6425 | if (i >= s) | |
6426 | fputs(" ", f); | |
6427 | else | |
6428 | fprintf(f, "%02x ", b[i]); | |
6429 | ||
6430 | if (i == 7) | |
6431 | fputc(' ', f); | |
6432 | } | |
6433 | ||
6434 | fputc(' ', f); | |
6435 | ||
6436 | for (i = 0; i < 16; i++) { | |
6437 | ||
6438 | if (i >= s) | |
6439 | fputc(' ', f); | |
6440 | else | |
6441 | fputc(isprint(b[i]) ? (char) b[i] : '.', f); | |
6442 | } | |
6443 | ||
6444 | fputc('\n', f); | |
6445 | ||
6446 | if (s < 16) | |
6447 | break; | |
6448 | ||
6449 | n += 16; | |
6450 | b += 16; | |
6451 | s -= 16; | |
6452 | } | |
6453 | } | |
c5220a94 MO |
6454 | |
6455 | int update_reboot_param_file(const char *param) | |
6456 | { | |
6457 | int r = 0; | |
6458 | ||
6459 | if (param) { | |
6460 | ||
6461 | r = write_string_file(REBOOT_PARAM_FILE, param); | |
6462 | if (r < 0) | |
6463 | log_error("Failed to write reboot param to " | |
6464 | REBOOT_PARAM_FILE": %s", strerror(-r)); | |
6465 | } else | |
6466 | unlink(REBOOT_PARAM_FILE); | |
6467 | ||
6468 | return r; | |
6469 | } |