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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 | |
a337c6fc | 2019 | |
9a34ec5f LP |
2020 | if (sigaction(sig, &sa, NULL) < 0) |
2021 | r = -errno; | |
2022 | ||
2023 | va_start(ap, sig); | |
2024 | while ((sig = va_arg(ap, int)) > 0) | |
2025 | if (sigaction(sig, &sa, NULL) < 0) | |
2026 | r = -errno; | |
2027 | va_end(ap); | |
2028 | ||
2029 | return r; | |
2030 | } | |
2031 | ||
2032 | int default_signals(int sig, ...) { | |
b92bea5d ZJS |
2033 | struct sigaction sa = { |
2034 | .sa_handler = SIG_DFL, | |
2035 | .sa_flags = SA_RESTART, | |
2036 | }; | |
9a34ec5f LP |
2037 | va_list ap; |
2038 | int r = 0; | |
2039 | ||
9a34ec5f LP |
2040 | if (sigaction(sig, &sa, NULL) < 0) |
2041 | r = -errno; | |
2042 | ||
2043 | va_start(ap, sig); | |
2044 | while ((sig = va_arg(ap, int)) > 0) | |
2045 | if (sigaction(sig, &sa, NULL) < 0) | |
2046 | r = -errno; | |
2047 | va_end(ap); | |
2048 | ||
2049 | return r; | |
a337c6fc LP |
2050 | } |
2051 | ||
3d94f76c | 2052 | void safe_close_pair(int p[]) { |
8d567588 LP |
2053 | assert(p); |
2054 | ||
3d94f76c LP |
2055 | if (p[0] == p[1]) { |
2056 | /* Special case pairs which use the same fd in both | |
2057 | * directions... */ | |
2058 | p[0] = p[1] = safe_close(p[0]); | |
2059 | return; | |
8d567588 LP |
2060 | } |
2061 | ||
3d94f76c LP |
2062 | p[0] = safe_close(p[0]); |
2063 | p[1] = safe_close(p[1]); | |
8d567588 LP |
2064 | } |
2065 | ||
eb22ac37 | 2066 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2067 | uint8_t *p = buf; |
8d567588 LP |
2068 | ssize_t n = 0; |
2069 | ||
2070 | assert(fd >= 0); | |
2071 | assert(buf); | |
2072 | ||
8d567588 LP |
2073 | while (nbytes > 0) { |
2074 | ssize_t k; | |
2075 | ||
7d5dd5e0 LP |
2076 | k = read(fd, p, nbytes); |
2077 | if (k < 0 && errno == EINTR) | |
2078 | continue; | |
8d567588 | 2079 | |
7d5dd5e0 | 2080 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 | 2081 | |
7d5dd5e0 LP |
2082 | /* We knowingly ignore any return value here, |
2083 | * and expect that any error/EOF is reported | |
2084 | * via read() */ | |
8d567588 | 2085 | |
7d5dd5e0 LP |
2086 | fd_wait_for_event(fd, POLLIN, (usec_t) -1); |
2087 | continue; | |
2088 | } | |
8d567588 | 2089 | |
7d5dd5e0 | 2090 | if (k <= 0) |
8d567588 | 2091 | return n > 0 ? n : (k < 0 ? -errno : 0); |
8d567588 LP |
2092 | |
2093 | p += k; | |
2094 | nbytes -= k; | |
2095 | n += k; | |
2096 | } | |
2097 | ||
2098 | return n; | |
2099 | } | |
2100 | ||
eb22ac37 | 2101 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2102 | const uint8_t *p = buf; |
eb22ac37 LP |
2103 | ssize_t n = 0; |
2104 | ||
2105 | assert(fd >= 0); | |
2106 | assert(buf); | |
2107 | ||
eb22ac37 LP |
2108 | while (nbytes > 0) { |
2109 | ssize_t k; | |
2110 | ||
fe652127 | 2111 | k = write(fd, p, nbytes); |
7d5dd5e0 LP |
2112 | if (k < 0 && errno == EINTR) |
2113 | continue; | |
eb22ac37 | 2114 | |
7d5dd5e0 | 2115 | if (k < 0 && errno == EAGAIN && do_poll) { |
eb22ac37 | 2116 | |
7d5dd5e0 LP |
2117 | /* We knowingly ignore any return value here, |
2118 | * and expect that any error/EOF is reported | |
2119 | * via write() */ | |
eb22ac37 | 2120 | |
7d5dd5e0 LP |
2121 | fd_wait_for_event(fd, POLLOUT, (usec_t) -1); |
2122 | continue; | |
2123 | } | |
eb22ac37 | 2124 | |
7d5dd5e0 | 2125 | if (k <= 0) |
eb22ac37 | 2126 | return n > 0 ? n : (k < 0 ? -errno : 0); |
eb22ac37 LP |
2127 | |
2128 | p += k; | |
2129 | nbytes -= k; | |
2130 | n += k; | |
2131 | } | |
2132 | ||
2133 | return n; | |
2134 | } | |
2135 | ||
5556b5fe LP |
2136 | int parse_size(const char *t, off_t base, off_t *size) { |
2137 | ||
2138 | /* Soo, sometimes we want to parse IEC binary suffxies, and | |
2139 | * sometimes SI decimal suffixes. This function can parse | |
2140 | * both. Which one is the right way depends on the | |
2141 | * context. Wikipedia suggests that SI is customary for | |
2142 | * hardrware metrics and network speeds, while IEC is | |
2143 | * customary for most data sizes used by software and volatile | |
2144 | * (RAM) memory. Hence be careful which one you pick! | |
2145 | * | |
2146 | * In either case we use just K, M, G as suffix, and not Ki, | |
2147 | * Mi, Gi or so (as IEC would suggest). That's because that's | |
2148 | * frickin' ugly. But this means you really need to make sure | |
2149 | * to document which base you are parsing when you use this | |
2150 | * call. */ | |
2151 | ||
2152 | struct table { | |
ab1f0633 | 2153 | const char *suffix; |
b32ff512 | 2154 | unsigned long long factor; |
5556b5fe LP |
2155 | }; |
2156 | ||
2157 | static const struct table iec[] = { | |
32895bb3 | 2158 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
840292be ZJS |
2159 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2160 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
2161 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2162 | { "M", 1024ULL*1024ULL }, | |
2163 | { "K", 1024ULL }, | |
2164 | { "B", 1 }, | |
ab1f0633 LP |
2165 | { "", 1 }, |
2166 | }; | |
2167 | ||
5556b5fe | 2168 | static const struct table si[] = { |
5556b5fe | 2169 | { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
840292be ZJS |
2170 | { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
2171 | { "T", 1000ULL*1000ULL*1000ULL*1000ULL }, | |
2172 | { "G", 1000ULL*1000ULL*1000ULL }, | |
2173 | { "M", 1000ULL*1000ULL }, | |
2174 | { "K", 1000ULL }, | |
2175 | { "B", 1 }, | |
5556b5fe LP |
2176 | { "", 1 }, |
2177 | }; | |
2178 | ||
2179 | const struct table *table; | |
ab1f0633 | 2180 | const char *p; |
b32ff512 | 2181 | unsigned long long r = 0; |
840292be | 2182 | unsigned n_entries, start_pos = 0; |
ab1f0633 LP |
2183 | |
2184 | assert(t); | |
5556b5fe LP |
2185 | assert(base == 1000 || base == 1024); |
2186 | assert(size); | |
2187 | ||
2188 | if (base == 1000) { | |
2189 | table = si; | |
2190 | n_entries = ELEMENTSOF(si); | |
2191 | } else { | |
2192 | table = iec; | |
2193 | n_entries = ELEMENTSOF(iec); | |
2194 | } | |
ab1f0633 LP |
2195 | |
2196 | p = t; | |
2197 | do { | |
2198 | long long l; | |
9480794b ZJS |
2199 | unsigned long long l2; |
2200 | double frac = 0; | |
ab1f0633 LP |
2201 | char *e; |
2202 | unsigned i; | |
2203 | ||
2204 | errno = 0; | |
2205 | l = strtoll(p, &e, 10); | |
2206 | ||
8333c77e | 2207 | if (errno > 0) |
ab1f0633 LP |
2208 | return -errno; |
2209 | ||
2210 | if (l < 0) | |
2211 | return -ERANGE; | |
2212 | ||
2213 | if (e == p) | |
2214 | return -EINVAL; | |
2215 | ||
9480794b ZJS |
2216 | if (*e == '.') { |
2217 | e++; | |
2218 | if (*e >= '0' && *e <= '9') { | |
2219 | char *e2; | |
2220 | ||
2221 | /* strotoull itself would accept space/+/- */ | |
2222 | l2 = strtoull(e, &e2, 10); | |
2223 | ||
2224 | if (errno == ERANGE) | |
2225 | return -errno; | |
2226 | ||
2227 | /* Ignore failure. E.g. 10.M is valid */ | |
2228 | frac = l2; | |
2229 | for (; e < e2; e++) | |
2230 | frac /= 10; | |
2231 | } | |
2232 | } | |
2233 | ||
ab1f0633 LP |
2234 | e += strspn(e, WHITESPACE); |
2235 | ||
840292be | 2236 | for (i = start_pos; i < n_entries; i++) |
ab1f0633 | 2237 | if (startswith(e, table[i].suffix)) { |
b32ff512 | 2238 | unsigned long long tmp; |
9480794b | 2239 | if ((unsigned long long) l + (frac > 0) > ULLONG_MAX / table[i].factor) |
b32ff512 | 2240 | return -ERANGE; |
9480794b | 2241 | tmp = l * table[i].factor + (unsigned long long) (frac * table[i].factor); |
b32ff512 ZJS |
2242 | if (tmp > ULLONG_MAX - r) |
2243 | return -ERANGE; | |
2244 | ||
2245 | r += tmp; | |
2246 | if ((unsigned long long) (off_t) r != r) | |
2247 | return -ERANGE; | |
2248 | ||
ab1f0633 | 2249 | p = e + strlen(table[i].suffix); |
840292be ZJS |
2250 | |
2251 | start_pos = i + 1; | |
ab1f0633 LP |
2252 | break; |
2253 | } | |
2254 | ||
5556b5fe | 2255 | if (i >= n_entries) |
ab1f0633 LP |
2256 | return -EINVAL; |
2257 | ||
b32ff512 | 2258 | } while (*p); |
ab1f0633 | 2259 | |
5556b5fe | 2260 | *size = r; |
ab1f0633 LP |
2261 | |
2262 | return 0; | |
2263 | } | |
2264 | ||
843d2643 LP |
2265 | int make_stdio(int fd) { |
2266 | int r, s, t; | |
2267 | ||
2268 | assert(fd >= 0); | |
2269 | ||
73836c5c LP |
2270 | r = dup3(fd, STDIN_FILENO, 0); |
2271 | s = dup3(fd, STDOUT_FILENO, 0); | |
2272 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2273 | |
2274 | if (fd >= 3) | |
03e334a1 | 2275 | safe_close(fd); |
843d2643 LP |
2276 | |
2277 | if (r < 0 || s < 0 || t < 0) | |
2278 | return -errno; | |
2279 | ||
73836c5c | 2280 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2281 | |
843d2643 LP |
2282 | return 0; |
2283 | } | |
2284 | ||
ade509ce LP |
2285 | int make_null_stdio(void) { |
2286 | int null_fd; | |
2287 | ||
cd3bd60a LP |
2288 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2289 | if (null_fd < 0) | |
ade509ce LP |
2290 | return -errno; |
2291 | ||
2292 | return make_stdio(null_fd); | |
2293 | } | |
2294 | ||
8407a5d0 LP |
2295 | bool is_device_path(const char *path) { |
2296 | ||
2297 | /* Returns true on paths that refer to a device, either in | |
2298 | * sysfs or in /dev */ | |
2299 | ||
2300 | return | |
2301 | path_startswith(path, "/dev/") || | |
2302 | path_startswith(path, "/sys/"); | |
2303 | } | |
2304 | ||
01f78473 | 2305 | int dir_is_empty(const char *path) { |
a05f97b3 | 2306 | _cleanup_closedir_ DIR *d; |
01f78473 | 2307 | |
a05f97b3 LP |
2308 | d = opendir(path); |
2309 | if (!d) | |
01f78473 LP |
2310 | return -errno; |
2311 | ||
2312 | for (;;) { | |
7d5e9c0f | 2313 | struct dirent *de; |
01f78473 | 2314 | |
3fd11280 FW |
2315 | errno = 0; |
2316 | de = readdir(d); | |
2317 | if (!de && errno != 0) | |
2318 | return -errno; | |
01f78473 | 2319 | |
a05f97b3 LP |
2320 | if (!de) |
2321 | return 1; | |
01f78473 | 2322 | |
a05f97b3 LP |
2323 | if (!ignore_file(de->d_name)) |
2324 | return 0; | |
2325 | } | |
01f78473 LP |
2326 | } |
2327 | ||
844ec79b ZJS |
2328 | char* dirname_malloc(const char *path) { |
2329 | char *d, *dir, *dir2; | |
2330 | ||
2331 | d = strdup(path); | |
2332 | if (!d) | |
2333 | return NULL; | |
2334 | dir = dirname(d); | |
2335 | assert(dir); | |
2336 | ||
2337 | if (dir != d) { | |
2338 | dir2 = strdup(dir); | |
2339 | free(d); | |
2340 | return dir2; | |
2341 | } | |
2342 | ||
2343 | return dir; | |
2344 | } | |
2345 | ||
b89446bb | 2346 | int dev_urandom(void *p, size_t n) { |
a05f97b3 | 2347 | _cleanup_close_ int fd; |
9bf3b535 | 2348 | ssize_t k; |
d3782d60 | 2349 | |
ac0930c8 LP |
2350 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2351 | if (fd < 0) | |
b89446bb | 2352 | return errno == ENOENT ? -ENOSYS : -errno; |
d3782d60 | 2353 | |
9bf3b535 | 2354 | k = loop_read(fd, p, n, true); |
b89446bb LP |
2355 | if (k < 0) |
2356 | return (int) k; | |
2357 | if ((size_t) k != n) | |
2358 | return -EIO; | |
2359 | ||
2360 | return 0; | |
2361 | } | |
2362 | ||
2363 | void random_bytes(void *p, size_t n) { | |
2364 | static bool srand_called = false; | |
2365 | uint8_t *q; | |
2366 | int r; | |
d3782d60 | 2367 | |
b89446bb LP |
2368 | r = dev_urandom(p, n); |
2369 | if (r >= 0) | |
2370 | return; | |
d3782d60 | 2371 | |
b89446bb LP |
2372 | /* If some idiot made /dev/urandom unavailable to us, he'll |
2373 | * get a PRNG instead. */ | |
d3782d60 | 2374 | |
9bf3b535 | 2375 | if (!srand_called) { |
b89446bb | 2376 | unsigned x = 0; |
a3b6fafe | 2377 | |
9bf3b535 LP |
2378 | #ifdef HAVE_SYS_AUXV_H |
2379 | /* The kernel provides us with a bit of entropy in | |
2380 | * auxv, so let's try to make use of that to seed the | |
2381 | * pseudo-random generator. It's better than | |
2382 | * nothing... */ | |
a3b6fafe | 2383 | |
9bf3b535 LP |
2384 | void *auxv; |
2385 | ||
2386 | auxv = (void*) getauxval(AT_RANDOM); | |
2387 | if (auxv) | |
b89446bb | 2388 | x ^= *(unsigned*) auxv; |
9bf3b535 | 2389 | #endif |
a3b6fafe | 2390 | |
b89446bb LP |
2391 | x ^= (unsigned) now(CLOCK_REALTIME); |
2392 | x ^= (unsigned) gettid(); | |
2393 | ||
2394 | srand(x); | |
9bf3b535 LP |
2395 | srand_called = true; |
2396 | } | |
a3b6fafe | 2397 | |
9bf3b535 LP |
2398 | for (q = p; q < (uint8_t*) p + n; q ++) |
2399 | *q = rand(); | |
a3b6fafe LP |
2400 | } |
2401 | ||
5b6319dc LP |
2402 | void rename_process(const char name[8]) { |
2403 | assert(name); | |
2404 | ||
5d6b1584 LP |
2405 | /* This is a like a poor man's setproctitle(). It changes the |
2406 | * comm field, argv[0], and also the glibc's internally used | |
2407 | * name of the process. For the first one a limit of 16 chars | |
2408 | * applies, to the second one usually one of 10 (i.e. length | |
2409 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2410 | * "systemd"). If you pass a longer string it will be | |
2411 | * truncated */ | |
5b6319dc | 2412 | |
5d6b1584 | 2413 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2414 | |
2415 | if (program_invocation_name) | |
2416 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2417 | |
2418 | if (saved_argc > 0) { | |
2419 | int i; | |
2420 | ||
2421 | if (saved_argv[0]) | |
2422 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2423 | ||
2424 | for (i = 1; i < saved_argc; i++) { | |
2425 | if (!saved_argv[i]) | |
2426 | break; | |
2427 | ||
29804cc1 | 2428 | memzero(saved_argv[i], strlen(saved_argv[i])); |
9a0e6896 LP |
2429 | } |
2430 | } | |
5b6319dc LP |
2431 | } |
2432 | ||
7d793605 LP |
2433 | void sigset_add_many(sigset_t *ss, ...) { |
2434 | va_list ap; | |
2435 | int sig; | |
2436 | ||
2437 | assert(ss); | |
2438 | ||
2439 | va_start(ap, ss); | |
2440 | while ((sig = va_arg(ap, int)) > 0) | |
2441 | assert_se(sigaddset(ss, sig) == 0); | |
2442 | va_end(ap); | |
2443 | } | |
2444 | ||
ef2f1067 LP |
2445 | char* gethostname_malloc(void) { |
2446 | struct utsname u; | |
2447 | ||
2448 | assert_se(uname(&u) >= 0); | |
2449 | ||
344de609 | 2450 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2451 | return strdup(u.nodename); |
2452 | ||
2453 | return strdup(u.sysname); | |
2454 | } | |
2455 | ||
344de609 LP |
2456 | bool hostname_is_set(void) { |
2457 | struct utsname u; | |
2458 | ||
2459 | assert_se(uname(&u) >= 0); | |
2460 | ||
2461 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2462 | } | |
2463 | ||
7c5f152a | 2464 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2465 | long bufsize; |
a05f97b3 LP |
2466 | char *name; |
2467 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2468 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2469 | |
2470 | /* Shortcut things to avoid NSS lookups */ | |
2471 | if (uid == 0) | |
2472 | return strdup("root"); | |
2473 | ||
7c5f152a LP |
2474 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2475 | if (bufsize <= 0) | |
ef2f1067 LP |
2476 | bufsize = 4096; |
2477 | ||
7c5f152a LP |
2478 | buf = malloc(bufsize); |
2479 | if (!buf) | |
ef2f1067 LP |
2480 | return NULL; |
2481 | ||
a05f97b3 LP |
2482 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2483 | return strdup(pw->pw_name); | |
ef2f1067 LP |
2484 | |
2485 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
2486 | return NULL; | |
2487 | ||
2488 | return name; | |
2489 | } | |
2490 | ||
7c5f152a LP |
2491 | char* getlogname_malloc(void) { |
2492 | uid_t uid; | |
2493 | struct stat st; | |
2494 | ||
2495 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2496 | uid = st.st_uid; | |
2497 | else | |
2498 | uid = getuid(); | |
2499 | ||
2500 | return lookup_uid(uid); | |
2501 | } | |
2502 | ||
2503 | char *getusername_malloc(void) { | |
2504 | const char *e; | |
2505 | ||
2506 | e = getenv("USER"); | |
2507 | if (e) | |
2508 | return strdup(e); | |
2509 | ||
2510 | return lookup_uid(getuid()); | |
2511 | } | |
2512 | ||
fc116c6a LP |
2513 | int getttyname_malloc(int fd, char **r) { |
2514 | char path[PATH_MAX], *c; | |
618e02c7 | 2515 | int k; |
8c6db833 LP |
2516 | |
2517 | assert(r); | |
ef2f1067 | 2518 | |
a05f97b3 | 2519 | k = ttyname_r(fd, path, sizeof(path)); |
27373e44 | 2520 | if (k > 0) |
618e02c7 | 2521 | return -k; |
ef2f1067 LP |
2522 | |
2523 | char_array_0(path); | |
2524 | ||
a05f97b3 LP |
2525 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2526 | if (!c) | |
8c6db833 LP |
2527 | return -ENOMEM; |
2528 | ||
2529 | *r = c; | |
2530 | return 0; | |
2531 | } | |
2532 | ||
fc116c6a LP |
2533 | int getttyname_harder(int fd, char **r) { |
2534 | int k; | |
2535 | char *s; | |
2536 | ||
a05f97b3 LP |
2537 | k = getttyname_malloc(fd, &s); |
2538 | if (k < 0) | |
fc116c6a LP |
2539 | return k; |
2540 | ||
2541 | if (streq(s, "tty")) { | |
2542 | free(s); | |
4d6d6518 | 2543 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2544 | } |
2545 | ||
2546 | *r = s; | |
2547 | return 0; | |
2548 | } | |
2549 | ||
4d6d6518 | 2550 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
b4696bce SP |
2551 | int r; |
2552 | _cleanup_free_ char *line = NULL; | |
2553 | const char *p; | |
fc116c6a | 2554 | unsigned long ttynr; |
fc116c6a | 2555 | |
49aa47c7 | 2556 | assert(pid >= 0); |
49aa47c7 | 2557 | |
b4696bce SP |
2558 | p = procfs_file_alloca(pid, "stat"); |
2559 | r = read_one_line_file(p, &line); | |
2560 | if (r < 0) | |
2561 | return r; | |
fc116c6a | 2562 | |
4d6d6518 LP |
2563 | p = strrchr(line, ')'); |
2564 | if (!p) | |
fc116c6a LP |
2565 | return -EIO; |
2566 | ||
2567 | p++; | |
2568 | ||
2569 | if (sscanf(p, " " | |
2570 | "%*c " /* state */ | |
2571 | "%*d " /* ppid */ | |
2572 | "%*d " /* pgrp */ | |
2573 | "%*d " /* session */ | |
2574 | "%lu ", /* ttynr */ | |
2575 | &ttynr) != 1) | |
2576 | return -EIO; | |
2577 | ||
11dc5d2b LP |
2578 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2579 | return -ENOENT; | |
2580 | ||
0bee65f0 LP |
2581 | if (d) |
2582 | *d = (dev_t) ttynr; | |
2583 | ||
fc116c6a LP |
2584 | return 0; |
2585 | } | |
2586 | ||
4d6d6518 | 2587 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
833fce28 LP |
2588 | char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *b = NULL; |
2589 | _cleanup_free_ char *s = NULL; | |
2590 | const char *p; | |
fc116c6a | 2591 | dev_t devnr; |
833fce28 | 2592 | int k; |
fc116c6a LP |
2593 | |
2594 | assert(r); | |
2595 | ||
4d6d6518 LP |
2596 | k = get_ctty_devnr(pid, &devnr); |
2597 | if (k < 0) | |
fc116c6a LP |
2598 | return k; |
2599 | ||
2600 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
fc116c6a | 2601 | |
23406ce5 LP |
2602 | k = readlink_malloc(fn, &s); |
2603 | if (k < 0) { | |
fc116c6a LP |
2604 | |
2605 | if (k != -ENOENT) | |
2606 | return k; | |
2607 | ||
46824d0e LP |
2608 | /* This is an ugly hack */ |
2609 | if (major(devnr) == 136) { | |
833fce28 LP |
2610 | asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)); |
2611 | goto finish; | |
46824d0e LP |
2612 | } |
2613 | ||
fc116c6a LP |
2614 | /* Probably something like the ptys which have no |
2615 | * symlink in /dev/char. Let's return something | |
2616 | * vaguely useful. */ | |
2617 | ||
23406ce5 | 2618 | b = strdup(fn + 5); |
833fce28 | 2619 | goto finish; |
fc116c6a LP |
2620 | } |
2621 | ||
2622 | if (startswith(s, "/dev/")) | |
2623 | p = s + 5; | |
2624 | else if (startswith(s, "../")) | |
2625 | p = s + 3; | |
2626 | else | |
2627 | p = s; | |
2628 | ||
2629 | b = strdup(p); | |
fc116c6a | 2630 | |
833fce28 | 2631 | finish: |
fc116c6a LP |
2632 | if (!b) |
2633 | return -ENOMEM; | |
2634 | ||
2635 | *r = b; | |
46824d0e LP |
2636 | if (_devnr) |
2637 | *_devnr = devnr; | |
2638 | ||
fc116c6a LP |
2639 | return 0; |
2640 | } | |
2641 | ||
f56d5db9 | 2642 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
2643 | DIR *d; |
2644 | int ret = 0; | |
2645 | ||
2646 | assert(fd >= 0); | |
2647 | ||
2648 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2649 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2650 | |
d4d046e3 LP |
2651 | d = fdopendir(fd); |
2652 | if (!d) { | |
03e334a1 | 2653 | safe_close(fd); |
4c633005 LP |
2654 | |
2655 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2656 | } |
2657 | ||
2658 | for (;;) { | |
7d5e9c0f | 2659 | struct dirent *de; |
7925c22a LP |
2660 | bool is_dir, keep_around; |
2661 | struct stat st; | |
8c6db833 LP |
2662 | int r; |
2663 | ||
3fd11280 FW |
2664 | errno = 0; |
2665 | de = readdir(d); | |
2666 | if (!de && errno != 0) { | |
2667 | if (ret == 0) | |
2668 | ret = -errno; | |
8c6db833 LP |
2669 | break; |
2670 | } | |
2671 | ||
2672 | if (!de) | |
2673 | break; | |
2674 | ||
2675 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
2676 | continue; | |
2677 | ||
7925c22a LP |
2678 | if (de->d_type == DT_UNKNOWN || |
2679 | honour_sticky || | |
2680 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2681 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2682 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2683 | ret = -errno; |
2684 | continue; | |
2685 | } | |
2686 | ||
2687 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2688 | keep_around = |
2689 | honour_sticky && | |
2690 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2691 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2692 | } else { |
8c6db833 | 2693 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2694 | keep_around = false; |
ad293f5a | 2695 | } |
8c6db833 LP |
2696 | |
2697 | if (is_dir) { | |
2698 | int subdir_fd; | |
8c6db833 | 2699 | |
597f43c7 | 2700 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
2701 | if (root_dev && st.st_dev != root_dev->st_dev) |
2702 | continue; | |
8c6db833 | 2703 | |
7925c22a LP |
2704 | subdir_fd = openat(fd, de->d_name, |
2705 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
2706 | if (subdir_fd < 0) { | |
2707 | if (ret == 0 && errno != ENOENT) | |
2708 | ret = -errno; | |
2709 | continue; | |
2710 | } | |
2711 | ||
b3d28469 | 2712 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
2713 | if (r < 0 && ret == 0) |
2714 | ret = r; | |
2715 | ||
2716 | if (!keep_around) | |
2717 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
2718 | if (ret == 0 && errno != ENOENT) |
2719 | ret = -errno; | |
2720 | } | |
2721 | ||
2722 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
2723 | |
2724 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 2725 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2726 | ret = -errno; |
2727 | } | |
2728 | } | |
2729 | } | |
2730 | ||
2731 | closedir(d); | |
2732 | ||
2733 | return ret; | |
2734 | } | |
2735 | ||
44a6b1b6 | 2736 | _pure_ static int is_temporary_fs(struct statfs *s) { |
943aad8c | 2737 | assert(s); |
73020ab2 SL |
2738 | |
2739 | return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) || | |
2740 | F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC); | |
943aad8c ZJS |
2741 | } |
2742 | ||
f56d5db9 LP |
2743 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
2744 | struct statfs s; | |
2745 | ||
2746 | assert(fd >= 0); | |
2747 | ||
2748 | if (fstatfs(fd, &s) < 0) { | |
03e334a1 | 2749 | safe_close(fd); |
f56d5db9 LP |
2750 | return -errno; |
2751 | } | |
2752 | ||
2753 | /* We refuse to clean disk file systems with this call. This | |
2754 | * is extra paranoia just to be sure we never ever remove | |
2755 | * non-state data */ | |
943aad8c | 2756 | if (!is_temporary_fs(&s)) { |
f56d5db9 | 2757 | log_error("Attempted to remove disk file system, and we can't allow that."); |
03e334a1 | 2758 | safe_close(fd); |
f56d5db9 LP |
2759 | return -EPERM; |
2760 | } | |
2761 | ||
2762 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
2763 | } | |
2764 | ||
2765 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
2766 | int fd, r; | |
2767 | struct statfs s; | |
8c6db833 LP |
2768 | |
2769 | assert(path); | |
2770 | ||
f56d5db9 LP |
2771 | /* We refuse to clean the root file system with this |
2772 | * call. This is extra paranoia to never cause a really | |
2773 | * seriously broken system. */ | |
2774 | if (path_equal(path, "/")) { | |
2775 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
2776 | return -EPERM; | |
2777 | } | |
461b1822 | 2778 | |
d4d046e3 LP |
2779 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
2780 | if (fd < 0) { | |
8c6db833 LP |
2781 | |
2782 | if (errno != ENOTDIR) | |
2783 | return -errno; | |
2784 | ||
f56d5db9 LP |
2785 | if (!dangerous) { |
2786 | if (statfs(path, &s) < 0) | |
2787 | return -errno; | |
2788 | ||
943aad8c | 2789 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2790 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2791 | return -EPERM; | |
2792 | } | |
2793 | } | |
2794 | ||
8c6db833 | 2795 | if (delete_root && !only_dirs) |
d4d046e3 | 2796 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
2797 | return -errno; |
2798 | ||
2799 | return 0; | |
2800 | } | |
2801 | ||
f56d5db9 LP |
2802 | if (!dangerous) { |
2803 | if (fstatfs(fd, &s) < 0) { | |
03e334a1 | 2804 | safe_close(fd); |
f56d5db9 LP |
2805 | return -errno; |
2806 | } | |
ad293f5a | 2807 | |
943aad8c | 2808 | if (!is_temporary_fs(&s)) { |
f56d5db9 | 2809 | log_error("Attempted to remove disk file system, and we can't allow that."); |
03e334a1 | 2810 | safe_close(fd); |
f56d5db9 LP |
2811 | return -EPERM; |
2812 | } | |
2813 | } | |
2814 | ||
2815 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
2816 | if (delete_root) { |
2817 | ||
8d53b453 | 2818 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 2819 | return r; |
8c6db833 | 2820 | |
e27796a0 | 2821 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
2822 | if (r == 0) |
2823 | r = -errno; | |
2824 | } | |
ad293f5a | 2825 | } |
8c6db833 LP |
2826 | |
2827 | return r; | |
2828 | } | |
2829 | ||
f56d5db9 LP |
2830 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
2831 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
2832 | } | |
2833 | ||
2834 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
2835 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
2836 | } | |
2837 | ||
8c6db833 LP |
2838 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
2839 | assert(path); | |
2840 | ||
2841 | /* Under the assumption that we are running privileged we | |
2842 | * first change the access mode and only then hand out | |
2843 | * ownership to avoid a window where access is too open. */ | |
2844 | ||
8d53b453 LP |
2845 | if (mode != (mode_t) -1) |
2846 | if (chmod(path, mode) < 0) | |
2847 | return -errno; | |
8c6db833 | 2848 | |
8d53b453 LP |
2849 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2850 | if (chown(path, uid, gid) < 0) | |
2851 | return -errno; | |
8c6db833 LP |
2852 | |
2853 | return 0; | |
ef2f1067 LP |
2854 | } |
2855 | ||
f4b47811 LP |
2856 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
2857 | assert(fd >= 0); | |
2858 | ||
2859 | /* Under the assumption that we are running privileged we | |
2860 | * first change the access mode and only then hand out | |
2861 | * ownership to avoid a window where access is too open. */ | |
2862 | ||
9588bc32 LP |
2863 | if (mode != (mode_t) -1) |
2864 | if (fchmod(fd, mode) < 0) | |
2865 | return -errno; | |
f4b47811 | 2866 | |
9588bc32 LP |
2867 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2868 | if (fchown(fd, uid, gid) < 0) | |
2869 | return -errno; | |
f4b47811 LP |
2870 | |
2871 | return 0; | |
2872 | } | |
2873 | ||
82c121a4 LP |
2874 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2875 | cpu_set_t *r; | |
2876 | unsigned n = 1024; | |
2877 | ||
2878 | /* Allocates the cpuset in the right size */ | |
2879 | ||
2880 | for (;;) { | |
2881 | if (!(r = CPU_ALLOC(n))) | |
2882 | return NULL; | |
2883 | ||
2884 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2885 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2886 | ||
2887 | if (ncpus) | |
2888 | *ncpus = n; | |
2889 | ||
2890 | return r; | |
2891 | } | |
2892 | ||
2893 | CPU_FREE(r); | |
2894 | ||
2895 | if (errno != EINVAL) | |
2896 | return NULL; | |
2897 | ||
2898 | n *= 2; | |
2899 | } | |
2900 | } | |
2901 | ||
984a2be4 | 2902 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) { |
9ab7a8d2 | 2903 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
2904 | _cleanup_free_ char *s = NULL; |
2905 | _cleanup_close_ int fd = -1; | |
b92bea5d | 2906 | struct iovec iovec[6] = {}; |
81beb750 | 2907 | int n = 0; |
984a2be4 | 2908 | static bool prev_ephemeral; |
9e58ff9c LP |
2909 | |
2910 | assert(format); | |
2911 | ||
9ab7a8d2 | 2912 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
2913 | * optional and go exclusively to the console. */ |
2914 | ||
2915 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 2916 | return log_oom(); |
9e58ff9c | 2917 | |
67e5cc4f | 2918 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 2919 | if (fd < 0) |
669bec5d | 2920 | return fd; |
9e58ff9c | 2921 | |
67e5cc4f | 2922 | if (ellipse) { |
9ab7a8d2 MS |
2923 | char *e; |
2924 | size_t emax, sl; | |
2925 | int c; | |
2926 | ||
67e5cc4f LP |
2927 | c = fd_columns(fd); |
2928 | if (c <= 0) | |
2929 | c = 80; | |
81beb750 | 2930 | |
669bec5d | 2931 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
2932 | |
2933 | emax = c - sl - 1; | |
2934 | if (emax < 3) | |
2935 | emax = 3; | |
81beb750 | 2936 | |
67e5cc4f LP |
2937 | e = ellipsize(s, emax, 75); |
2938 | if (e) { | |
2939 | free(s); | |
2940 | s = e; | |
2941 | } | |
81beb750 LP |
2942 | } |
2943 | ||
984a2be4 MS |
2944 | if (prev_ephemeral) |
2945 | IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE); | |
2946 | prev_ephemeral = ephemeral; | |
2947 | ||
9ab7a8d2 MS |
2948 | if (status) { |
2949 | if (!isempty(status)) { | |
2950 | IOVEC_SET_STRING(iovec[n++], "["); | |
2951 | IOVEC_SET_STRING(iovec[n++], status); | |
2952 | IOVEC_SET_STRING(iovec[n++], "] "); | |
2953 | } else | |
2954 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
2955 | } |
2956 | ||
9ab7a8d2 | 2957 | IOVEC_SET_STRING(iovec[n++], s); |
984a2be4 MS |
2958 | if (!ephemeral) |
2959 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 2960 | |
669bec5d LP |
2961 | if (writev(fd, iovec, n) < 0) |
2962 | return -errno; | |
9e58ff9c | 2963 | |
669bec5d | 2964 | return 0; |
9e58ff9c LP |
2965 | } |
2966 | ||
984a2be4 | 2967 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) { |
c846ff47 | 2968 | va_list ap; |
669bec5d | 2969 | int r; |
c846ff47 LP |
2970 | |
2971 | assert(format); | |
2972 | ||
2973 | va_start(ap, format); | |
984a2be4 | 2974 | r = status_vprintf(status, ellipse, ephemeral, format, ap); |
c846ff47 | 2975 | va_end(ap); |
669bec5d LP |
2976 | |
2977 | return r; | |
c846ff47 LP |
2978 | } |
2979 | ||
fab56fc5 LP |
2980 | char *replace_env(const char *format, char **env) { |
2981 | enum { | |
2982 | WORD, | |
c24eb49e | 2983 | CURLY, |
fab56fc5 LP |
2984 | VARIABLE |
2985 | } state = WORD; | |
2986 | ||
2987 | const char *e, *word = format; | |
2988 | char *r = NULL, *k; | |
2989 | ||
2990 | assert(format); | |
2991 | ||
2992 | for (e = format; *e; e ++) { | |
2993 | ||
2994 | switch (state) { | |
2995 | ||
2996 | case WORD: | |
2997 | if (*e == '$') | |
c24eb49e | 2998 | state = CURLY; |
fab56fc5 LP |
2999 | break; |
3000 | ||
c24eb49e LP |
3001 | case CURLY: |
3002 | if (*e == '{') { | |
fab56fc5 LP |
3003 | if (!(k = strnappend(r, word, e-word-1))) |
3004 | goto fail; | |
3005 | ||
3006 | free(r); | |
3007 | r = k; | |
3008 | ||
3009 | word = e-1; | |
3010 | state = VARIABLE; | |
3011 | ||
3012 | } else if (*e == '$') { | |
3013 | if (!(k = strnappend(r, word, e-word))) | |
3014 | goto fail; | |
3015 | ||
3016 | free(r); | |
3017 | r = k; | |
3018 | ||
3019 | word = e+1; | |
3020 | state = WORD; | |
3021 | } else | |
3022 | state = WORD; | |
3023 | break; | |
3024 | ||
3025 | case VARIABLE: | |
c24eb49e | 3026 | if (*e == '}') { |
b95cf362 | 3027 | const char *t; |
fab56fc5 | 3028 | |
4d1a6904 | 3029 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 3030 | |
4d1a6904 LP |
3031 | k = strappend(r, t); |
3032 | if (!k) | |
b95cf362 | 3033 | goto fail; |
fab56fc5 | 3034 | |
b95cf362 LP |
3035 | free(r); |
3036 | r = k; | |
fab56fc5 | 3037 | |
b95cf362 | 3038 | word = e+1; |
fab56fc5 LP |
3039 | state = WORD; |
3040 | } | |
3041 | break; | |
3042 | } | |
3043 | } | |
3044 | ||
3045 | if (!(k = strnappend(r, word, e-word))) | |
3046 | goto fail; | |
3047 | ||
3048 | free(r); | |
3049 | return k; | |
3050 | ||
3051 | fail: | |
3052 | free(r); | |
3053 | return NULL; | |
3054 | } | |
3055 | ||
3056 | char **replace_env_argv(char **argv, char **env) { | |
3057 | char **r, **i; | |
c24eb49e LP |
3058 | unsigned k = 0, l = 0; |
3059 | ||
3060 | l = strv_length(argv); | |
fab56fc5 | 3061 | |
c24eb49e | 3062 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3063 | return NULL; |
3064 | ||
3065 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3066 | |
3067 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3068 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3069 | char *e; | |
3070 | char **w, **m; | |
3071 | unsigned q; | |
c24eb49e | 3072 | |
4d1a6904 LP |
3073 | e = strv_env_get(env, *i+1); |
3074 | if (e) { | |
c24eb49e LP |
3075 | |
3076 | if (!(m = strv_split_quoted(e))) { | |
3077 | r[k] = NULL; | |
3078 | strv_free(r); | |
3079 | return NULL; | |
3080 | } | |
b95cf362 LP |
3081 | } else |
3082 | m = NULL; | |
c24eb49e | 3083 | |
b95cf362 LP |
3084 | q = strv_length(m); |
3085 | l = l + q - 1; | |
c24eb49e | 3086 | |
b95cf362 LP |
3087 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3088 | r[k] = NULL; | |
3089 | strv_free(r); | |
3090 | strv_free(m); | |
3091 | return NULL; | |
3092 | } | |
c24eb49e | 3093 | |
b95cf362 LP |
3094 | r = w; |
3095 | if (m) { | |
c24eb49e LP |
3096 | memcpy(r + k, m, q * sizeof(char*)); |
3097 | free(m); | |
c24eb49e | 3098 | } |
b95cf362 LP |
3099 | |
3100 | k += q; | |
3101 | continue; | |
c24eb49e LP |
3102 | } |
3103 | ||
3104 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3105 | if (!(r[k++] = replace_env(*i, env))) { |
3106 | strv_free(r); | |
3107 | return NULL; | |
3108 | } | |
3109 | } | |
3110 | ||
3111 | r[k] = NULL; | |
3112 | return r; | |
3113 | } | |
3114 | ||
81beb750 | 3115 | int fd_columns(int fd) { |
b92bea5d | 3116 | struct winsize ws = {}; |
81beb750 LP |
3117 | |
3118 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3119 | return -errno; | |
3120 | ||
3121 | if (ws.ws_col <= 0) | |
3122 | return -EIO; | |
3123 | ||
3124 | return ws.ws_col; | |
3125 | } | |
3126 | ||
28917d7d | 3127 | unsigned columns(void) { |
fa776d8e | 3128 | const char *e; |
7009eec2 | 3129 | int c; |
fa776d8e | 3130 | |
28917d7d LP |
3131 | if (_likely_(cached_columns > 0)) |
3132 | return cached_columns; | |
11f96fac | 3133 | |
28917d7d LP |
3134 | c = 0; |
3135 | e = getenv("COLUMNS"); | |
3136 | if (e) | |
7009eec2 | 3137 | safe_atoi(e, &c); |
fa776d8e | 3138 | |
28917d7d LP |
3139 | if (c <= 0) |
3140 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3141 | |
28917d7d LP |
3142 | if (c <= 0) |
3143 | c = 80; | |
11f96fac | 3144 | |
28917d7d LP |
3145 | cached_columns = c; |
3146 | return c; | |
11f96fac ZJS |
3147 | } |
3148 | ||
8f2d43a0 | 3149 | int fd_lines(int fd) { |
b92bea5d | 3150 | struct winsize ws = {}; |
8f2d43a0 LP |
3151 | |
3152 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3153 | return -errno; | |
3154 | ||
3155 | if (ws.ws_row <= 0) | |
3156 | return -EIO; | |
3157 | ||
3158 | return ws.ws_row; | |
3159 | } | |
3160 | ||
3161 | unsigned lines(void) { | |
8f2d43a0 | 3162 | const char *e; |
ed757c0c | 3163 | unsigned l; |
8f2d43a0 | 3164 | |
ed757c0c LP |
3165 | if (_likely_(cached_lines > 0)) |
3166 | return cached_lines; | |
8f2d43a0 | 3167 | |
ed757c0c | 3168 | l = 0; |
8f2d43a0 LP |
3169 | e = getenv("LINES"); |
3170 | if (e) | |
ed757c0c | 3171 | safe_atou(e, &l); |
8f2d43a0 | 3172 | |
ed757c0c LP |
3173 | if (l <= 0) |
3174 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3175 | |
ed757c0c LP |
3176 | if (l <= 0) |
3177 | l = 24; | |
8f2d43a0 | 3178 | |
ed757c0c LP |
3179 | cached_lines = l; |
3180 | return cached_lines; | |
3181 | } | |
3182 | ||
3183 | /* intended to be used as a SIGWINCH sighandler */ | |
3184 | void columns_lines_cache_reset(int signum) { | |
3185 | cached_columns = 0; | |
3186 | cached_lines = 0; | |
3187 | } | |
3188 | ||
3189 | bool on_tty(void) { | |
3190 | static int cached_on_tty = -1; | |
3191 | ||
3192 | if (_unlikely_(cached_on_tty < 0)) | |
3193 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3194 | ||
3195 | return cached_on_tty; | |
8f2d43a0 LP |
3196 | } |
3197 | ||
9d9951a4 HH |
3198 | int files_same(const char *filea, const char *fileb) { |
3199 | struct stat a, b; | |
b4f10a5e | 3200 | |
9d9951a4 | 3201 | if (stat(filea, &a) < 0) |
b4f10a5e LP |
3202 | return -errno; |
3203 | ||
9d9951a4 | 3204 | if (stat(fileb, &b) < 0) |
b4f10a5e LP |
3205 | return -errno; |
3206 | ||
9d9951a4 HH |
3207 | return a.st_dev == b.st_dev && |
3208 | a.st_ino == b.st_ino; | |
3209 | } | |
3210 | ||
3211 | int running_in_chroot(void) { | |
3212 | int ret; | |
3213 | ||
3214 | ret = files_same("/proc/1/root", "/"); | |
3215 | if (ret < 0) | |
3216 | return ret; | |
3217 | ||
3218 | return ret == 0; | |
b4f10a5e LP |
3219 | } |
3220 | ||
f405e86d | 3221 | static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
72f59706 | 3222 | size_t x; |
8fe914ec LP |
3223 | char *r; |
3224 | ||
3225 | assert(s); | |
3226 | assert(percent <= 100); | |
72f59706 | 3227 | assert(new_length >= 3); |
8fe914ec | 3228 | |
72f59706 LP |
3229 | if (old_length <= 3 || old_length <= new_length) |
3230 | return strndup(s, old_length); | |
8fe914ec | 3231 | |
72f59706 LP |
3232 | r = new0(char, new_length+1); |
3233 | if (!r) | |
a6f0104a | 3234 | return NULL; |
8fe914ec | 3235 | |
72f59706 | 3236 | x = (new_length * percent) / 100; |
8fe914ec | 3237 | |
72f59706 LP |
3238 | if (x > new_length - 3) |
3239 | x = new_length - 3; | |
8fe914ec LP |
3240 | |
3241 | memcpy(r, s, x); | |
3242 | r[x] = '.'; | |
3243 | r[x+1] = '.'; | |
3244 | r[x+2] = '.'; | |
3245 | memcpy(r + x + 3, | |
72f59706 LP |
3246 | s + old_length - (new_length - x - 3), |
3247 | new_length - x - 3); | |
8fe914ec LP |
3248 | |
3249 | return r; | |
3250 | } | |
3251 | ||
f405e86d SL |
3252 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3253 | size_t x; | |
3254 | char *e; | |
3255 | const char *i, *j; | |
3256 | unsigned k, len, len2; | |
3257 | ||
3258 | assert(s); | |
3259 | assert(percent <= 100); | |
3260 | assert(new_length >= 3); | |
3261 | ||
3262 | /* if no multibyte characters use ascii_ellipsize_mem for speed */ | |
3263 | if (ascii_is_valid(s)) | |
3264 | return ascii_ellipsize_mem(s, old_length, new_length, percent); | |
3265 | ||
3266 | if (old_length <= 3 || old_length <= new_length) | |
3267 | return strndup(s, old_length); | |
3268 | ||
3269 | x = (new_length * percent) / 100; | |
3270 | ||
3271 | if (x > new_length - 3) | |
3272 | x = new_length - 3; | |
3273 | ||
3274 | k = 0; | |
3275 | for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) { | |
3276 | int c; | |
3277 | ||
3278 | c = utf8_encoded_to_unichar(i); | |
3279 | if (c < 0) | |
3280 | return NULL; | |
3281 | k += unichar_iswide(c) ? 2 : 1; | |
3282 | } | |
3283 | ||
3284 | if (k > x) /* last character was wide and went over quota */ | |
3285 | x ++; | |
3286 | ||
3287 | for (j = s + old_length; k < new_length && j > i; ) { | |
3288 | int c; | |
3289 | ||
3290 | j = utf8_prev_char(j); | |
3291 | c = utf8_encoded_to_unichar(j); | |
3292 | if (c < 0) | |
3293 | return NULL; | |
3294 | k += unichar_iswide(c) ? 2 : 1; | |
3295 | } | |
3296 | assert(i <= j); | |
3297 | ||
3298 | /* we don't actually need to ellipsize */ | |
3299 | if (i == j) | |
3300 | return memdup(s, old_length + 1); | |
3301 | ||
3302 | /* make space for ellipsis */ | |
3303 | j = utf8_next_char(j); | |
3304 | ||
3305 | len = i - s; | |
3306 | len2 = s + old_length - j; | |
3307 | e = new(char, len + 3 + len2 + 1); | |
3308 | if (!e) | |
3309 | return NULL; | |
3310 | ||
3311 | /* | |
3312 | printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n", | |
3313 | old_length, new_length, x, len, len2, k); | |
3314 | */ | |
3315 | ||
3316 | memcpy(e, s, len); | |
3317 | e[len] = 0xe2; /* tri-dot ellipsis: … */ | |
3318 | e[len + 1] = 0x80; | |
3319 | e[len + 2] = 0xa6; | |
3320 | ||
3321 | memcpy(e + len + 3, j, len2 + 1); | |
3322 | ||
3323 | return e; | |
3324 | } | |
3325 | ||
72f59706 LP |
3326 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3327 | return ellipsize_mem(s, strlen(s), length, percent); | |
3328 | } | |
3329 | ||
f6144808 | 3330 | int touch(const char *path) { |
03e334a1 | 3331 | _cleanup_close_ int fd; |
f6144808 LP |
3332 | |
3333 | assert(path); | |
3334 | ||
73836c5c LP |
3335 | /* This just opens the file for writing, ensuring it |
3336 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3337 | * does it. */ | |
3338 | ||
3339 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3340 | if (fd < 0) | |
f6144808 LP |
3341 | return -errno; |
3342 | ||
f6144808 LP |
3343 | return 0; |
3344 | } | |
afea26ad | 3345 | |
97c4a07d | 3346 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3347 | size_t l; |
3348 | assert(s); | |
3349 | ||
73836c5c LP |
3350 | /* This is rather stupid, simply removes the heading and |
3351 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3352 | * escaping or anything. We should make this smarter one |
3353 | * day...*/ | |
73836c5c | 3354 | |
31ed59c5 LP |
3355 | l = strlen(s); |
3356 | if (l < 2) | |
11ce3427 LP |
3357 | return strdup(s); |
3358 | ||
97c4a07d | 3359 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3360 | return strndup(s+1, l-2); |
3361 | ||
3362 | return strdup(s); | |
3363 | } | |
3364 | ||
5f7c426e | 3365 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3366 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3367 | char *eq, *r; | |
5f7c426e | 3368 | |
57f30678 LP |
3369 | eq = strchr(s, '='); |
3370 | if (!eq) { | |
3371 | char *t; | |
5f7c426e | 3372 | |
57f30678 LP |
3373 | r = strdup(s); |
3374 | if (!r) | |
5f7c426e LP |
3375 | return NULL; |
3376 | ||
57f30678 LP |
3377 | t = strstrip(r); |
3378 | if (t == r) | |
3379 | return r; | |
3380 | ||
3381 | memmove(r, t, strlen(t) + 1); | |
3382 | return r; | |
5f7c426e LP |
3383 | } |
3384 | ||
57f30678 LP |
3385 | name = strndup(s, eq - s); |
3386 | if (!name) | |
5f7c426e LP |
3387 | return NULL; |
3388 | ||
57f30678 LP |
3389 | p = strdup(eq + 1); |
3390 | if (!p) | |
5f7c426e | 3391 | return NULL; |
5f7c426e LP |
3392 | |
3393 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3394 | if (!value) |
5f7c426e | 3395 | return NULL; |
5f7c426e | 3396 | |
57f30678 | 3397 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3398 | r = NULL; |
3399 | ||
5f7c426e LP |
3400 | return r; |
3401 | } | |
3402 | ||
8e12a6ae | 3403 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3404 | siginfo_t dummy; |
3405 | ||
2e78aa99 | 3406 | assert(pid >= 1); |
1968a360 LP |
3407 | |
3408 | if (!status) | |
3409 | status = &dummy; | |
2e78aa99 LP |
3410 | |
3411 | for (;;) { | |
8e12a6ae LP |
3412 | zero(*status); |
3413 | ||
3414 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3415 | |
3416 | if (errno == EINTR) | |
3417 | continue; | |
3418 | ||
3419 | return -errno; | |
3420 | } | |
3421 | ||
3422 | return 0; | |
3423 | } | |
3424 | } | |
3425 | ||
97c4a07d LP |
3426 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3427 | int r; | |
3428 | siginfo_t status; | |
3429 | ||
3430 | assert(name); | |
3431 | assert(pid > 1); | |
3432 | ||
d87be9b0 LP |
3433 | r = wait_for_terminate(pid, &status); |
3434 | if (r < 0) { | |
97c4a07d LP |
3435 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3436 | return r; | |
3437 | } | |
3438 | ||
3439 | if (status.si_code == CLD_EXITED) { | |
3440 | if (status.si_status != 0) { | |
3441 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3442 | return status.si_status; |
97c4a07d LP |
3443 | } |
3444 | ||
3445 | log_debug("%s succeeded.", name); | |
3446 | return 0; | |
3447 | ||
3448 | } else if (status.si_code == CLD_KILLED || | |
3449 | status.si_code == CLD_DUMPED) { | |
3450 | ||
3451 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3452 | return -EPROTO; | |
3453 | } | |
3454 | ||
3455 | log_warning("%s failed due to unknown reason.", name); | |
3456 | return -EPROTO; | |
97c4a07d LP |
3457 | } |
3458 | ||
919ce0b7 | 3459 | noreturn void freeze(void) { |
720ce21d LP |
3460 | |
3461 | /* Make sure nobody waits for us on a socket anymore */ | |
3462 | close_all_fds(NULL, 0); | |
3463 | ||
c29597a1 LP |
3464 | sync(); |
3465 | ||
3c14d26c LP |
3466 | for (;;) |
3467 | pause(); | |
3468 | } | |
3469 | ||
00dc5d76 LP |
3470 | bool null_or_empty(struct stat *st) { |
3471 | assert(st); | |
3472 | ||
3473 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3474 | return true; | |
3475 | ||
c8f26f42 | 3476 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3477 | return true; |
3478 | ||
3479 | return false; | |
3480 | } | |
3481 | ||
83096483 LP |
3482 | int null_or_empty_path(const char *fn) { |
3483 | struct stat st; | |
3484 | ||
3485 | assert(fn); | |
3486 | ||
3487 | if (stat(fn, &st) < 0) | |
3488 | return -errno; | |
3489 | ||
3490 | return null_or_empty(&st); | |
3491 | } | |
3492 | ||
a247755d | 3493 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3494 | int nfd; |
3495 | DIR *d; | |
3496 | ||
dd94c17e LP |
3497 | assert(!(flags & O_CREAT)); |
3498 | ||
3499 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
73836c5c | 3500 | if (nfd < 0) |
c4731d11 LP |
3501 | return NULL; |
3502 | ||
73836c5c LP |
3503 | d = fdopendir(nfd); |
3504 | if (!d) { | |
03e334a1 | 3505 | safe_close(nfd); |
c4731d11 LP |
3506 | return NULL; |
3507 | } | |
3508 | ||
3509 | return d; | |
3b63d2d3 LP |
3510 | } |
3511 | ||
8a0867d6 LP |
3512 | int signal_from_string_try_harder(const char *s) { |
3513 | int signo; | |
3514 | assert(s); | |
3515 | ||
73836c5c LP |
3516 | signo = signal_from_string(s); |
3517 | if (signo <= 0) | |
8a0867d6 LP |
3518 | if (startswith(s, "SIG")) |
3519 | return signal_from_string(s+3); | |
3520 | ||
3521 | return signo; | |
3522 | } | |
3523 | ||
383182b5 | 3524 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
22f5f628 | 3525 | _cleanup_free_ char *t = NULL, *u = NULL; |
22f5f628 | 3526 | size_t enc_len; |
e23a0ce8 | 3527 | |
383182b5 | 3528 | u = unquote(tagvalue, "\"\'"); |
6db615c1 | 3529 | if (!u) |
383182b5 | 3530 | return NULL; |
e23a0ce8 | 3531 | |
1d5989fd | 3532 | enc_len = strlen(u) * 4 + 1; |
22f5f628 | 3533 | t = new(char, enc_len); |
6db615c1 | 3534 | if (!t) |
383182b5 | 3535 | return NULL; |
e23a0ce8 | 3536 | |
8f6ce71f | 3537 | if (encode_devnode_name(u, t, enc_len) < 0) |
22f5f628 | 3538 | return NULL; |
e23a0ce8 | 3539 | |
6db615c1 | 3540 | return strjoin("/dev/disk/by-", by, "/", t, NULL); |
383182b5 | 3541 | } |
e23a0ce8 | 3542 | |
383182b5 | 3543 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3544 | assert(p); |
3545 | ||
383182b5 DR |
3546 | if (startswith(p, "LABEL=")) |
3547 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3548 | |
383182b5 DR |
3549 | if (startswith(p, "UUID=")) |
3550 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3551 | |
84cc2abf DR |
3552 | if (startswith(p, "PARTUUID=")) |
3553 | return tag_to_udev_node(p+9, "partuuid"); | |
3554 | ||
3555 | if (startswith(p, "PARTLABEL=")) | |
3556 | return tag_to_udev_node(p+10, "partlabel"); | |
3557 | ||
e23a0ce8 LP |
3558 | return strdup(p); |
3559 | } | |
3560 | ||
f212ac12 LP |
3561 | bool tty_is_vc(const char *tty) { |
3562 | assert(tty); | |
3563 | ||
3564 | if (startswith(tty, "/dev/")) | |
3565 | tty += 5; | |
3566 | ||
98a28fef LP |
3567 | return vtnr_from_tty(tty) >= 0; |
3568 | } | |
3569 | ||
d1122ad5 LP |
3570 | bool tty_is_console(const char *tty) { |
3571 | assert(tty); | |
3572 | ||
3573 | if (startswith(tty, "/dev/")) | |
3574 | tty += 5; | |
3575 | ||
3576 | return streq(tty, "console"); | |
3577 | } | |
3578 | ||
98a28fef LP |
3579 | int vtnr_from_tty(const char *tty) { |
3580 | int i, r; | |
3581 | ||
3582 | assert(tty); | |
3583 | ||
3584 | if (startswith(tty, "/dev/")) | |
3585 | tty += 5; | |
3586 | ||
3587 | if (!startswith(tty, "tty") ) | |
3588 | return -EINVAL; | |
3589 | ||
3590 | if (tty[3] < '0' || tty[3] > '9') | |
3591 | return -EINVAL; | |
3592 | ||
3593 | r = safe_atoi(tty+3, &i); | |
3594 | if (r < 0) | |
3595 | return r; | |
3596 | ||
3597 | if (i < 0 || i > 63) | |
3598 | return -EINVAL; | |
3599 | ||
3600 | return i; | |
f212ac12 LP |
3601 | } |
3602 | ||
21baf21a MS |
3603 | char *resolve_dev_console(char **active) { |
3604 | char *tty; | |
3605 | ||
3606 | /* Resolve where /dev/console is pointing to, if /sys is actually ours | |
3607 | * (i.e. not read-only-mounted which is a sign for container setups) */ | |
3608 | ||
3609 | if (path_is_read_only_fs("/sys") > 0) | |
3610 | return NULL; | |
3611 | ||
3612 | if (read_one_line_file("/sys/class/tty/console/active", active) < 0) | |
3613 | return NULL; | |
3614 | ||
3615 | /* If multiple log outputs are configured the last one is what | |
3616 | * /dev/console points to */ | |
3617 | tty = strrchr(*active, ' '); | |
3618 | if (tty) | |
3619 | tty++; | |
3620 | else | |
3621 | tty = *active; | |
3622 | ||
8aa5429a OB |
3623 | if (streq(tty, "tty0")) { |
3624 | char *tmp; | |
3625 | ||
3626 | /* Get the active VC (e.g. tty1) */ | |
3627 | if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) { | |
3628 | free(*active); | |
3629 | tty = *active = tmp; | |
3630 | } | |
3631 | } | |
3632 | ||
21baf21a MS |
3633 | return tty; |
3634 | } | |
3635 | ||
3043935f | 3636 | bool tty_is_vc_resolve(const char *tty) { |
9588bc32 | 3637 | _cleanup_free_ char *active = NULL; |
3030ccd7 | 3638 | |
e3aa71c3 LP |
3639 | assert(tty); |
3640 | ||
3641 | if (startswith(tty, "/dev/")) | |
3642 | tty += 5; | |
3643 | ||
21baf21a MS |
3644 | if (streq(tty, "console")) { |
3645 | tty = resolve_dev_console(&active); | |
3646 | if (!tty) | |
3647 | return false; | |
3648 | } | |
3030ccd7 | 3649 | |
9588bc32 | 3650 | return tty_is_vc(tty); |
3043935f LP |
3651 | } |
3652 | ||
3653 | const char *default_term_for_tty(const char *tty) { | |
3654 | assert(tty); | |
3655 | ||
acda6a05 | 3656 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3657 | } |
3658 | ||
87d2c1ff | 3659 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3660 | assert(de); |
3661 | ||
3662 | if (ignore_file(de->d_name)) | |
3663 | return false; | |
3664 | ||
3665 | if (de->d_type != DT_REG && | |
3666 | de->d_type != DT_LNK && | |
3667 | de->d_type != DT_UNKNOWN) | |
3668 | return false; | |
3669 | ||
3670 | return true; | |
3671 | } | |
3672 | ||
87d2c1ff LP |
3673 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3674 | assert(de); | |
3675 | ||
a228a22f LP |
3676 | if (de->d_type != DT_REG && |
3677 | de->d_type != DT_LNK && | |
3678 | de->d_type != DT_UNKNOWN) | |
3679 | return false; | |
3680 | ||
3681 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3682 | return false; |
3683 | ||
3684 | return endswith(de->d_name, suffix); | |
3685 | } | |
3686 | ||
aa62a893 LP |
3687 | void execute_directory(const char *directory, DIR *d, usec_t timeout, char *argv[]) { |
3688 | pid_t executor_pid; | |
3689 | int r; | |
83cc030f LP |
3690 | |
3691 | assert(directory); | |
3692 | ||
aa62a893 LP |
3693 | /* Executes all binaries in a directory in parallel and waits |
3694 | * for them to finish. Optionally a timeout is applied. */ | |
83cc030f | 3695 | |
aa62a893 LP |
3696 | executor_pid = fork(); |
3697 | if (executor_pid < 0) { | |
3698 | log_error("Failed to fork: %m"); | |
3699 | return; | |
83cc030f | 3700 | |
aa62a893 LP |
3701 | } else if (executor_pid == 0) { |
3702 | _cleanup_hashmap_free_free_ Hashmap *pids = NULL; | |
3703 | _cleanup_closedir_ DIR *_d = NULL; | |
3704 | struct dirent *de; | |
3705 | sigset_t ss; | |
83cc030f | 3706 | |
aa62a893 LP |
3707 | /* We fork this all off from a child process so that |
3708 | * we can somewhat cleanly make use of SIGALRM to set | |
3709 | * a time limit */ | |
83cc030f | 3710 | |
aa62a893 | 3711 | reset_all_signal_handlers(); |
83cc030f | 3712 | |
aa62a893 LP |
3713 | assert_se(sigemptyset(&ss) == 0); |
3714 | assert_se(sigprocmask(SIG_SETMASK, &ss, NULL) == 0); | |
83cc030f | 3715 | |
aa62a893 | 3716 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 3717 | |
aa62a893 LP |
3718 | if (!d) { |
3719 | d = _d = opendir(directory); | |
3720 | if (!d) { | |
3721 | if (errno == ENOENT) | |
3722 | _exit(EXIT_SUCCESS); | |
83cc030f | 3723 | |
aa62a893 LP |
3724 | log_error("Failed to enumerate directory %s: %m", directory); |
3725 | _exit(EXIT_FAILURE); | |
3726 | } | |
83cc030f LP |
3727 | } |
3728 | ||
aa62a893 LP |
3729 | pids = hashmap_new(NULL, NULL); |
3730 | if (!pids) { | |
3731 | log_oom(); | |
3732 | _exit(EXIT_FAILURE); | |
83cc030f LP |
3733 | } |
3734 | ||
aa62a893 LP |
3735 | FOREACH_DIRENT(de, d, break) { |
3736 | _cleanup_free_ char *path = NULL; | |
3737 | pid_t pid; | |
83cc030f | 3738 | |
aa62a893 LP |
3739 | if (!dirent_is_file(de)) |
3740 | continue; | |
83cc030f | 3741 | |
aa62a893 LP |
3742 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { |
3743 | log_oom(); | |
3744 | _exit(EXIT_FAILURE); | |
3745 | } | |
83cc030f | 3746 | |
aa62a893 LP |
3747 | pid = fork(); |
3748 | if (pid < 0) { | |
3749 | log_error("Failed to fork: %m"); | |
3750 | continue; | |
3751 | } else if (pid == 0) { | |
3752 | char *_argv[2]; | |
83cc030f | 3753 | |
aa62a893 | 3754 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 3755 | |
aa62a893 LP |
3756 | if (!argv) { |
3757 | _argv[0] = path; | |
3758 | _argv[1] = NULL; | |
3759 | argv = _argv; | |
3760 | } else | |
3761 | argv[0] = path; | |
83cc030f | 3762 | |
aa62a893 LP |
3763 | execv(path, argv); |
3764 | log_error("Failed to execute %s: %m", path); | |
3765 | _exit(EXIT_FAILURE); | |
3766 | } | |
83cc030f | 3767 | |
83cc030f | 3768 | |
aa62a893 | 3769 | log_debug("Spawned %s as " PID_FMT ".", path, pid); |
83cc030f | 3770 | |
aa62a893 LP |
3771 | r = hashmap_put(pids, UINT_TO_PTR(pid), path); |
3772 | if (r < 0) { | |
3773 | log_oom(); | |
3774 | _exit(EXIT_FAILURE); | |
3775 | } | |
3776 | ||
3777 | path = NULL; | |
83cc030f LP |
3778 | } |
3779 | ||
aa62a893 LP |
3780 | /* Abort execution of this process after the |
3781 | * timout. We simply rely on SIGALRM as default action | |
3782 | * terminating the process, and turn on alarm(). */ | |
3783 | ||
3784 | if (timeout != (usec_t) -1) | |
3785 | alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC); | |
3786 | ||
3787 | while (!hashmap_isempty(pids)) { | |
3788 | _cleanup_free_ char *path = NULL; | |
3789 | pid_t pid; | |
3790 | ||
3791 | pid = PTR_TO_UINT(hashmap_first_key(pids)); | |
3792 | assert(pid > 0); | |
83cc030f | 3793 | |
aa62a893 LP |
3794 | path = hashmap_remove(pids, UINT_TO_PTR(pid)); |
3795 | assert(path); | |
3796 | ||
3797 | wait_for_terminate_and_warn(path, pid); | |
83cc030f | 3798 | } |
83cc030f | 3799 | |
aa62a893 LP |
3800 | _exit(EXIT_SUCCESS); |
3801 | } | |
83cc030f | 3802 | |
aa62a893 | 3803 | wait_for_terminate_and_warn(directory, executor_pid); |
83cc030f LP |
3804 | } |
3805 | ||
430c18ed LP |
3806 | int kill_and_sigcont(pid_t pid, int sig) { |
3807 | int r; | |
3808 | ||
3809 | r = kill(pid, sig) < 0 ? -errno : 0; | |
3810 | ||
3811 | if (r >= 0) | |
3812 | kill(pid, SIGCONT); | |
3813 | ||
3814 | return r; | |
3815 | } | |
3816 | ||
05feefe0 LP |
3817 | bool nulstr_contains(const char*nulstr, const char *needle) { |
3818 | const char *i; | |
3819 | ||
3820 | if (!nulstr) | |
3821 | return false; | |
3822 | ||
3823 | NULSTR_FOREACH(i, nulstr) | |
3824 | if (streq(i, needle)) | |
3825 | return true; | |
3826 | ||
3827 | return false; | |
3828 | } | |
3829 | ||
6faa1114 | 3830 | bool plymouth_running(void) { |
9408a2d2 | 3831 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
3832 | } |
3833 | ||
9beb3f4d LP |
3834 | char* strshorten(char *s, size_t l) { |
3835 | assert(s); | |
3836 | ||
3837 | if (l < strlen(s)) | |
3838 | s[l] = 0; | |
3839 | ||
3840 | return s; | |
3841 | } | |
3842 | ||
3843 | static bool hostname_valid_char(char c) { | |
3844 | return | |
3845 | (c >= 'a' && c <= 'z') || | |
3846 | (c >= 'A' && c <= 'Z') || | |
3847 | (c >= '0' && c <= '9') || | |
3848 | c == '-' || | |
3849 | c == '_' || | |
3850 | c == '.'; | |
3851 | } | |
3852 | ||
3853 | bool hostname_is_valid(const char *s) { | |
3854 | const char *p; | |
aa3c5cf8 | 3855 | bool dot; |
9beb3f4d LP |
3856 | |
3857 | if (isempty(s)) | |
3858 | return false; | |
3859 | ||
aa3c5cf8 LP |
3860 | for (p = s, dot = true; *p; p++) { |
3861 | if (*p == '.') { | |
3862 | if (dot) | |
3863 | return false; | |
3864 | ||
3865 | dot = true; | |
3866 | } else { | |
3867 | if (!hostname_valid_char(*p)) | |
3868 | return false; | |
3869 | ||
3870 | dot = false; | |
3871 | } | |
3872 | } | |
3873 | ||
3874 | if (dot) | |
3875 | return false; | |
9beb3f4d LP |
3876 | |
3877 | if (p-s > HOST_NAME_MAX) | |
3878 | return false; | |
3879 | ||
3880 | return true; | |
3881 | } | |
3882 | ||
e724b063 | 3883 | char* hostname_cleanup(char *s, bool lowercase) { |
9beb3f4d | 3884 | char *p, *d; |
cec4ead9 LP |
3885 | bool dot; |
3886 | ||
3887 | for (p = s, d = s, dot = true; *p; p++) { | |
3888 | if (*p == '.') { | |
e724b063 | 3889 | if (dot) |
cec4ead9 | 3890 | continue; |
9beb3f4d | 3891 | |
e724b063 | 3892 | *(d++) = '.'; |
cec4ead9 | 3893 | dot = true; |
e724b063 LP |
3894 | } else if (hostname_valid_char(*p)) { |
3895 | *(d++) = lowercase ? tolower(*p) : *p; | |
cec4ead9 | 3896 | dot = false; |
e724b063 | 3897 | } |
cec4ead9 | 3898 | |
cec4ead9 | 3899 | } |
9beb3f4d | 3900 | |
e724b063 LP |
3901 | if (dot && d > s) |
3902 | d[-1] = 0; | |
3903 | else | |
3904 | *d = 0; | |
3905 | ||
9beb3f4d | 3906 | strshorten(s, HOST_NAME_MAX); |
cec4ead9 | 3907 | |
9beb3f4d LP |
3908 | return s; |
3909 | } | |
3910 | ||
1325aa42 | 3911 | int pipe_eof(int fd) { |
b92bea5d ZJS |
3912 | struct pollfd pollfd = { |
3913 | .fd = fd, | |
3914 | .events = POLLIN|POLLHUP, | |
3915 | }; | |
1325aa42 | 3916 | |
d37a91e8 LP |
3917 | int r; |
3918 | ||
1325aa42 LP |
3919 | r = poll(&pollfd, 1, 0); |
3920 | if (r < 0) | |
3921 | return -errno; | |
3922 | ||
3923 | if (r == 0) | |
3924 | return 0; | |
3925 | ||
3926 | return pollfd.revents & POLLHUP; | |
3927 | } | |
3928 | ||
8f2d43a0 | 3929 | int fd_wait_for_event(int fd, int event, usec_t t) { |
968d3d24 | 3930 | |
b92bea5d ZJS |
3931 | struct pollfd pollfd = { |
3932 | .fd = fd, | |
3933 | .events = event, | |
3934 | }; | |
df50185b | 3935 | |
968d3d24 LP |
3936 | struct timespec ts; |
3937 | int r; | |
3938 | ||
3939 | r = ppoll(&pollfd, 1, t == (usec_t) -1 ? NULL : timespec_store(&ts, t), NULL); | |
df50185b LP |
3940 | if (r < 0) |
3941 | return -errno; | |
3942 | ||
3943 | if (r == 0) | |
3944 | return 0; | |
3945 | ||
3946 | return pollfd.revents; | |
3947 | } | |
3948 | ||
5a3ab509 LP |
3949 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
3950 | FILE *f; | |
3951 | char *t; | |
3952 | const char *fn; | |
3953 | size_t k; | |
3954 | int fd; | |
3955 | ||
3956 | assert(path); | |
3957 | assert(_f); | |
3958 | assert(_temp_path); | |
3959 | ||
3960 | t = new(char, strlen(path) + 1 + 6 + 1); | |
3961 | if (!t) | |
3962 | return -ENOMEM; | |
3963 | ||
2b6bf07d ZJS |
3964 | fn = basename(path); |
3965 | k = fn - path; | |
5a3ab509 LP |
3966 | memcpy(t, path, k); |
3967 | t[k] = '.'; | |
3968 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
3969 | ||
2d5bdf5b | 3970 | fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC); |
5a3ab509 LP |
3971 | if (fd < 0) { |
3972 | free(t); | |
3973 | return -errno; | |
3974 | } | |
3975 | ||
3976 | f = fdopen(fd, "we"); | |
3977 | if (!f) { | |
3978 | unlink(t); | |
3979 | free(t); | |
3980 | return -errno; | |
3981 | } | |
3982 | ||
3983 | *_f = f; | |
3984 | *_temp_path = t; | |
3985 | ||
3986 | return 0; | |
3987 | } | |
3988 | ||
6ea832a2 | 3989 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
3990 | assert(fd >= 0); |
3991 | ||
6ea832a2 LP |
3992 | if (ioctl(fd, TIOCVHANGUP) < 0) |
3993 | return -errno; | |
3994 | ||
3995 | return 0; | |
3996 | } | |
3997 | ||
3998 | int terminal_vhangup(const char *name) { | |
03e334a1 | 3999 | _cleanup_close_ int fd; |
6ea832a2 LP |
4000 | |
4001 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4002 | if (fd < 0) | |
4003 | return fd; | |
4004 | ||
03e334a1 | 4005 | return terminal_vhangup_fd(fd); |
6ea832a2 LP |
4006 | } |
4007 | ||
4008 | int vt_disallocate(const char *name) { | |
4009 | int fd, r; | |
4010 | unsigned u; | |
6ea832a2 LP |
4011 | |
4012 | /* Deallocate the VT if possible. If not possible | |
4013 | * (i.e. because it is the active one), at least clear it | |
4014 | * entirely (including the scrollback buffer) */ | |
4015 | ||
b83bc4e9 LP |
4016 | if (!startswith(name, "/dev/")) |
4017 | return -EINVAL; | |
4018 | ||
4019 | if (!tty_is_vc(name)) { | |
4020 | /* So this is not a VT. I guess we cannot deallocate | |
4021 | * it then. But let's at least clear the screen */ | |
4022 | ||
4023 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4024 | if (fd < 0) | |
4025 | return fd; | |
4026 | ||
8585357a LP |
4027 | loop_write(fd, |
4028 | "\033[r" /* clear scrolling region */ | |
4029 | "\033[H" /* move home */ | |
4030 | "\033[2J", /* clear screen */ | |
4031 | 10, false); | |
03e334a1 | 4032 | safe_close(fd); |
b83bc4e9 LP |
4033 | |
4034 | return 0; | |
4035 | } | |
6ea832a2 LP |
4036 | |
4037 | if (!startswith(name, "/dev/tty")) | |
4038 | return -EINVAL; | |
4039 | ||
4040 | r = safe_atou(name+8, &u); | |
4041 | if (r < 0) | |
4042 | return r; | |
4043 | ||
4044 | if (u <= 0) | |
b83bc4e9 | 4045 | return -EINVAL; |
6ea832a2 | 4046 | |
b83bc4e9 | 4047 | /* Try to deallocate */ |
6ea832a2 LP |
4048 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4049 | if (fd < 0) | |
4050 | return fd; | |
4051 | ||
4052 | r = ioctl(fd, VT_DISALLOCATE, u); | |
03e334a1 | 4053 | safe_close(fd); |
6ea832a2 | 4054 | |
b83bc4e9 LP |
4055 | if (r >= 0) |
4056 | return 0; | |
6ea832a2 | 4057 | |
b83bc4e9 | 4058 | if (errno != EBUSY) |
6ea832a2 | 4059 | return -errno; |
6ea832a2 | 4060 | |
b83bc4e9 LP |
4061 | /* Couldn't deallocate, so let's clear it fully with |
4062 | * scrollback */ | |
4063 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4064 | if (fd < 0) |
b83bc4e9 | 4065 | return fd; |
6ea832a2 | 4066 | |
8585357a LP |
4067 | loop_write(fd, |
4068 | "\033[r" /* clear scrolling region */ | |
4069 | "\033[H" /* move home */ | |
4070 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4071 | 10, false); | |
03e334a1 | 4072 | safe_close(fd); |
6ea832a2 | 4073 | |
b83bc4e9 | 4074 | return 0; |
6ea832a2 LP |
4075 | } |
4076 | ||
51045322 LP |
4077 | int copy_file(const char *from, const char *to, int flags) { |
4078 | _cleanup_close_ int fdf = -1; | |
4079 | int r, fdt; | |
34ca941c LP |
4080 | |
4081 | assert(from); | |
4082 | assert(to); | |
4083 | ||
4084 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4085 | if (fdf < 0) | |
4086 | return -errno; | |
4087 | ||
51045322 LP |
4088 | fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); |
4089 | if (fdt < 0) | |
34ca941c | 4090 | return -errno; |
34ca941c LP |
4091 | |
4092 | for (;;) { | |
4093 | char buf[PIPE_BUF]; | |
4094 | ssize_t n, k; | |
4095 | ||
4096 | n = read(fdf, buf, sizeof(buf)); | |
4097 | if (n < 0) { | |
4098 | r = -errno; | |
4099 | ||
34ca941c LP |
4100 | close_nointr(fdt); |
4101 | unlink(to); | |
4102 | ||
4103 | return r; | |
4104 | } | |
4105 | ||
4106 | if (n == 0) | |
4107 | break; | |
4108 | ||
4109 | errno = 0; | |
4110 | k = loop_write(fdt, buf, n, false); | |
4111 | if (n != k) { | |
4112 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4113 | ||
34ca941c | 4114 | close_nointr(fdt); |
34ca941c | 4115 | unlink(to); |
51045322 | 4116 | |
34ca941c LP |
4117 | return r; |
4118 | } | |
4119 | } | |
4120 | ||
34ca941c LP |
4121 | r = close_nointr(fdt); |
4122 | ||
4123 | if (r < 0) { | |
4124 | unlink(to); | |
4125 | return r; | |
4126 | } | |
4127 | ||
4128 | return 0; | |
4129 | } | |
4130 | ||
424a19f8 LP |
4131 | int symlink_atomic(const char *from, const char *to) { |
4132 | char *x; | |
4133 | _cleanup_free_ char *t; | |
34ca941c LP |
4134 | const char *fn; |
4135 | size_t k; | |
9bf3b535 | 4136 | uint64_t u; |
34ca941c LP |
4137 | unsigned i; |
4138 | int r; | |
4139 | ||
4140 | assert(from); | |
4141 | assert(to); | |
4142 | ||
4143 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4144 | if (!t) | |
4145 | return -ENOMEM; | |
4146 | ||
2b6bf07d | 4147 | fn = basename(to); |
34ca941c LP |
4148 | k = fn-to; |
4149 | memcpy(t, to, k); | |
4150 | t[k] = '.'; | |
4151 | x = stpcpy(t+k+1, fn); | |
4152 | ||
9bf3b535 | 4153 | u = random_u64(); |
34ca941c | 4154 | for (i = 0; i < 16; i++) { |
9bf3b535 LP |
4155 | *(x++) = hexchar(u & 0xF); |
4156 | u >>= 4; | |
34ca941c LP |
4157 | } |
4158 | ||
4159 | *x = 0; | |
4160 | ||
424a19f8 LP |
4161 | if (symlink(from, t) < 0) |
4162 | return -errno; | |
34ca941c LP |
4163 | |
4164 | if (rename(t, to) < 0) { | |
4165 | r = -errno; | |
4166 | unlink(t); | |
34ca941c LP |
4167 | return r; |
4168 | } | |
4169 | ||
424a19f8 | 4170 | return 0; |
34ca941c LP |
4171 | } |
4172 | ||
4d6d6518 LP |
4173 | bool display_is_local(const char *display) { |
4174 | assert(display); | |
4175 | ||
4176 | return | |
4177 | display[0] == ':' && | |
4178 | display[1] >= '0' && | |
4179 | display[1] <= '9'; | |
4180 | } | |
4181 | ||
4182 | int socket_from_display(const char *display, char **path) { | |
4183 | size_t k; | |
4184 | char *f, *c; | |
4185 | ||
4186 | assert(display); | |
4187 | assert(path); | |
4188 | ||
4189 | if (!display_is_local(display)) | |
4190 | return -EINVAL; | |
4191 | ||
4192 | k = strspn(display+1, "0123456789"); | |
4193 | ||
f8294e41 | 4194 | f = new(char, strlen("/tmp/.X11-unix/X") + k + 1); |
4d6d6518 LP |
4195 | if (!f) |
4196 | return -ENOMEM; | |
4197 | ||
4198 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4199 | memcpy(c, display+1, k); | |
4200 | c[k] = 0; | |
4201 | ||
4202 | *path = f; | |
4203 | ||
4204 | return 0; | |
4205 | } | |
4206 | ||
d05c5031 LP |
4207 | int get_user_creds( |
4208 | const char **username, | |
4209 | uid_t *uid, gid_t *gid, | |
4210 | const char **home, | |
4211 | const char **shell) { | |
4212 | ||
1cccf435 | 4213 | struct passwd *p; |
ddd88763 | 4214 | uid_t u; |
1cccf435 MV |
4215 | |
4216 | assert(username); | |
4217 | assert(*username); | |
1cccf435 MV |
4218 | |
4219 | /* We enforce some special rules for uid=0: in order to avoid | |
4220 | * NSS lookups for root we hardcode its data. */ | |
4221 | ||
4222 | if (streq(*username, "root") || streq(*username, "0")) { | |
4223 | *username = "root"; | |
4b67834e LP |
4224 | |
4225 | if (uid) | |
4226 | *uid = 0; | |
4227 | ||
4228 | if (gid) | |
4229 | *gid = 0; | |
4230 | ||
4231 | if (home) | |
4232 | *home = "/root"; | |
d05c5031 LP |
4233 | |
4234 | if (shell) | |
4235 | *shell = "/bin/sh"; | |
4236 | ||
1cccf435 MV |
4237 | return 0; |
4238 | } | |
4239 | ||
ddd88763 | 4240 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4241 | errno = 0; |
ddd88763 | 4242 | p = getpwuid(u); |
1cccf435 MV |
4243 | |
4244 | /* If there are multiple users with the same id, make | |
4245 | * sure to leave $USER to the configured value instead | |
4246 | * of the first occurrence in the database. However if | |
4247 | * the uid was configured by a numeric uid, then let's | |
4248 | * pick the real username from /etc/passwd. */ | |
4249 | if (p) | |
4250 | *username = p->pw_name; | |
4251 | } else { | |
4252 | errno = 0; | |
4253 | p = getpwnam(*username); | |
4254 | } | |
4255 | ||
4256 | if (!p) | |
8333c77e | 4257 | return errno > 0 ? -errno : -ESRCH; |
1cccf435 | 4258 | |
4b67834e LP |
4259 | if (uid) |
4260 | *uid = p->pw_uid; | |
4261 | ||
4262 | if (gid) | |
4263 | *gid = p->pw_gid; | |
4264 | ||
4265 | if (home) | |
4266 | *home = p->pw_dir; | |
4267 | ||
d05c5031 LP |
4268 | if (shell) |
4269 | *shell = p->pw_shell; | |
4270 | ||
4b67834e LP |
4271 | return 0; |
4272 | } | |
4273 | ||
59164be4 LP |
4274 | char* uid_to_name(uid_t uid) { |
4275 | struct passwd *p; | |
4276 | char *r; | |
4277 | ||
4278 | if (uid == 0) | |
4279 | return strdup("root"); | |
4280 | ||
4281 | p = getpwuid(uid); | |
4282 | if (p) | |
4283 | return strdup(p->pw_name); | |
4284 | ||
4285 | if (asprintf(&r, "%lu", (unsigned long) uid) < 0) | |
4286 | return NULL; | |
4287 | ||
4288 | return r; | |
4289 | } | |
4290 | ||
4468addc LP |
4291 | char* gid_to_name(gid_t gid) { |
4292 | struct group *p; | |
4293 | char *r; | |
4294 | ||
4295 | if (gid == 0) | |
4296 | return strdup("root"); | |
4297 | ||
4298 | p = getgrgid(gid); | |
4299 | if (p) | |
4300 | return strdup(p->gr_name); | |
4301 | ||
4302 | if (asprintf(&r, "%lu", (unsigned long) gid) < 0) | |
4303 | return NULL; | |
4304 | ||
4305 | return r; | |
4306 | } | |
4307 | ||
4b67834e LP |
4308 | int get_group_creds(const char **groupname, gid_t *gid) { |
4309 | struct group *g; | |
4310 | gid_t id; | |
4311 | ||
4312 | assert(groupname); | |
4313 | ||
4314 | /* We enforce some special rules for gid=0: in order to avoid | |
4315 | * NSS lookups for root we hardcode its data. */ | |
4316 | ||
4317 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4318 | *groupname = "root"; | |
4319 | ||
4320 | if (gid) | |
4321 | *gid = 0; | |
4322 | ||
4323 | return 0; | |
4324 | } | |
4325 | ||
4326 | if (parse_gid(*groupname, &id) >= 0) { | |
4327 | errno = 0; | |
4328 | g = getgrgid(id); | |
4329 | ||
4330 | if (g) | |
4331 | *groupname = g->gr_name; | |
4332 | } else { | |
4333 | errno = 0; | |
4334 | g = getgrnam(*groupname); | |
4335 | } | |
4336 | ||
4337 | if (!g) | |
8333c77e | 4338 | return errno > 0 ? -errno : -ESRCH; |
4b67834e LP |
4339 | |
4340 | if (gid) | |
4341 | *gid = g->gr_gid; | |
4342 | ||
1cccf435 MV |
4343 | return 0; |
4344 | } | |
4345 | ||
4468addc LP |
4346 | int in_gid(gid_t gid) { |
4347 | gid_t *gids; | |
43673799 LP |
4348 | int ngroups_max, r, i; |
4349 | ||
43673799 LP |
4350 | if (getgid() == gid) |
4351 | return 1; | |
4352 | ||
4353 | if (getegid() == gid) | |
4354 | return 1; | |
4355 | ||
4356 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4357 | assert(ngroups_max > 0); | |
4358 | ||
4359 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4360 | ||
4361 | r = getgroups(ngroups_max, gids); | |
4362 | if (r < 0) | |
4363 | return -errno; | |
4364 | ||
4365 | for (i = 0; i < r; i++) | |
4366 | if (gids[i] == gid) | |
4367 | return 1; | |
4368 | ||
4369 | return 0; | |
4370 | } | |
4371 | ||
4468addc LP |
4372 | int in_group(const char *name) { |
4373 | int r; | |
4374 | gid_t gid; | |
4375 | ||
4376 | r = get_group_creds(&name, &gid); | |
4377 | if (r < 0) | |
4378 | return r; | |
4379 | ||
4380 | return in_gid(gid); | |
4381 | } | |
4382 | ||
8092a428 | 4383 | int glob_exists(const char *path) { |
7fd1b19b | 4384 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 4385 | int k; |
8092a428 LP |
4386 | |
4387 | assert(path); | |
4388 | ||
8092a428 LP |
4389 | errno = 0; |
4390 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4391 | ||
4392 | if (k == GLOB_NOMATCH) | |
8d98da3f | 4393 | return 0; |
8092a428 | 4394 | else if (k == GLOB_NOSPACE) |
8d98da3f | 4395 | return -ENOMEM; |
8092a428 | 4396 | else if (k == 0) |
8d98da3f | 4397 | return !strv_isempty(g.gl_pathv); |
8092a428 | 4398 | else |
8d98da3f ZJS |
4399 | return errno ? -errno : -EIO; |
4400 | } | |
8092a428 | 4401 | |
8d98da3f ZJS |
4402 | int glob_extend(char ***strv, const char *path) { |
4403 | _cleanup_globfree_ glob_t g = {}; | |
4404 | int k; | |
4405 | char **p; | |
4406 | ||
4407 | errno = 0; | |
a8ccacf5 | 4408 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
4409 | |
4410 | if (k == GLOB_NOMATCH) | |
4411 | return -ENOENT; | |
4412 | else if (k == GLOB_NOSPACE) | |
4413 | return -ENOMEM; | |
4414 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
4415 | return errno ? -errno : -EIO; | |
4416 | ||
4417 | STRV_FOREACH(p, g.gl_pathv) { | |
4418 | k = strv_extend(strv, *p); | |
4419 | if (k < 0) | |
4420 | break; | |
4421 | } | |
4422 | ||
4423 | return k; | |
8092a428 LP |
4424 | } |
4425 | ||
83096483 LP |
4426 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4427 | struct stat st; | |
4428 | ||
4429 | assert(d); | |
4430 | assert(de); | |
4431 | ||
4432 | if (de->d_type != DT_UNKNOWN) | |
4433 | return 0; | |
4434 | ||
4435 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4436 | return -errno; | |
4437 | ||
4438 | de->d_type = | |
4439 | S_ISREG(st.st_mode) ? DT_REG : | |
4440 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4441 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4442 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4443 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4444 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4445 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4446 | DT_UNKNOWN; | |
4447 | ||
4448 | return 0; | |
4449 | } | |
4450 | ||
4451 | int in_search_path(const char *path, char **search) { | |
893fa014 ZJS |
4452 | char **i; |
4453 | _cleanup_free_ char *parent = NULL; | |
83096483 LP |
4454 | int r; |
4455 | ||
9eb977db | 4456 | r = path_get_parent(path, &parent); |
83096483 LP |
4457 | if (r < 0) |
4458 | return r; | |
4459 | ||
893fa014 ZJS |
4460 | STRV_FOREACH(i, search) |
4461 | if (path_equal(parent, *i)) | |
4462 | return 1; | |
83096483 | 4463 | |
893fa014 | 4464 | return 0; |
83096483 LP |
4465 | } |
4466 | ||
034a2a52 | 4467 | int get_files_in_directory(const char *path, char ***list) { |
893fa014 ZJS |
4468 | _cleanup_closedir_ DIR *d = NULL; |
4469 | size_t bufsize = 0, n = 0; | |
4470 | _cleanup_strv_free_ char **l = NULL; | |
034a2a52 LP |
4471 | |
4472 | assert(path); | |
d60ef526 LP |
4473 | |
4474 | /* Returns all files in a directory in *list, and the number | |
4475 | * of files as return value. If list is NULL returns only the | |
893fa014 | 4476 | * number. */ |
034a2a52 LP |
4477 | |
4478 | d = opendir(path); | |
8ea913b2 LP |
4479 | if (!d) |
4480 | return -errno; | |
4481 | ||
034a2a52 | 4482 | for (;;) { |
7d5e9c0f | 4483 | struct dirent *de; |
034a2a52 | 4484 | |
3fd11280 FW |
4485 | errno = 0; |
4486 | de = readdir(d); | |
4487 | if (!de && errno != 0) | |
4488 | return -errno; | |
034a2a52 LP |
4489 | if (!de) |
4490 | break; | |
4491 | ||
4492 | dirent_ensure_type(d, de); | |
4493 | ||
4494 | if (!dirent_is_file(de)) | |
4495 | continue; | |
4496 | ||
d60ef526 | 4497 | if (list) { |
893fa014 ZJS |
4498 | /* one extra slot is needed for the terminating NULL */ |
4499 | if (!GREEDY_REALLOC(l, bufsize, n + 2)) | |
4500 | return -ENOMEM; | |
034a2a52 | 4501 | |
893fa014 ZJS |
4502 | l[n] = strdup(de->d_name); |
4503 | if (!l[n]) | |
4504 | return -ENOMEM; | |
034a2a52 | 4505 | |
893fa014 | 4506 | l[++n] = NULL; |
d60ef526 | 4507 | } else |
893fa014 | 4508 | n++; |
034a2a52 LP |
4509 | } |
4510 | ||
893fa014 ZJS |
4511 | if (list) { |
4512 | *list = l; | |
4513 | l = NULL; /* avoid freeing */ | |
4514 | } | |
034a2a52 | 4515 | |
893fa014 | 4516 | return n; |
034a2a52 LP |
4517 | } |
4518 | ||
b7def684 | 4519 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4520 | va_list ap; |
4521 | size_t l; | |
4522 | char *r, *p; | |
4523 | ||
4524 | va_start(ap, x); | |
4525 | ||
4526 | if (x) { | |
4527 | l = strlen(x); | |
4528 | ||
4529 | for (;;) { | |
4530 | const char *t; | |
040f18ea | 4531 | size_t n; |
911a4828 LP |
4532 | |
4533 | t = va_arg(ap, const char *); | |
4534 | if (!t) | |
4535 | break; | |
4536 | ||
040f18ea | 4537 | n = strlen(t); |
e98055de LN |
4538 | if (n > ((size_t) -1) - l) { |
4539 | va_end(ap); | |
040f18ea | 4540 | return NULL; |
e98055de | 4541 | } |
040f18ea LP |
4542 | |
4543 | l += n; | |
911a4828 LP |
4544 | } |
4545 | } else | |
4546 | l = 0; | |
4547 | ||
4548 | va_end(ap); | |
4549 | ||
4550 | r = new(char, l+1); | |
4551 | if (!r) | |
4552 | return NULL; | |
4553 | ||
4554 | if (x) { | |
4555 | p = stpcpy(r, x); | |
4556 | ||
4557 | va_start(ap, x); | |
4558 | ||
4559 | for (;;) { | |
4560 | const char *t; | |
4561 | ||
4562 | t = va_arg(ap, const char *); | |
4563 | if (!t) | |
4564 | break; | |
4565 | ||
4566 | p = stpcpy(p, t); | |
4567 | } | |
8ea913b2 LP |
4568 | |
4569 | va_end(ap); | |
911a4828 LP |
4570 | } else |
4571 | r[0] = 0; | |
4572 | ||
4573 | return r; | |
4574 | } | |
4575 | ||
b636465b | 4576 | bool is_main_thread(void) { |
ec202eae | 4577 | static thread_local int cached = 0; |
b636465b LP |
4578 | |
4579 | if (_unlikely_(cached == 0)) | |
4580 | cached = getpid() == gettid() ? 1 : -1; | |
4581 | ||
4582 | return cached > 0; | |
4583 | } | |
4584 | ||
94959f0f LP |
4585 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4586 | char *p, *s; | |
4587 | int r; | |
4588 | unsigned n, m; | |
4589 | ||
4590 | assert(ret); | |
4591 | ||
4592 | /* If it has a queue this is good enough for us */ | |
4593 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4594 | return -ENOMEM; | |
4595 | ||
4596 | r = access(p, F_OK); | |
4597 | free(p); | |
4598 | ||
4599 | if (r >= 0) { | |
4600 | *ret = d; | |
4601 | return 0; | |
4602 | } | |
4603 | ||
4604 | /* If it is a partition find the originating device */ | |
4605 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4606 | return -ENOMEM; | |
4607 | ||
4608 | r = access(p, F_OK); | |
4609 | free(p); | |
4610 | ||
4611 | if (r < 0) | |
4612 | return -ENOENT; | |
4613 | ||
4614 | /* Get parent dev_t */ | |
4615 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4616 | return -ENOMEM; | |
4617 | ||
4618 | r = read_one_line_file(p, &s); | |
4619 | free(p); | |
4620 | ||
4621 | if (r < 0) | |
4622 | return r; | |
4623 | ||
4624 | r = sscanf(s, "%u:%u", &m, &n); | |
4625 | free(s); | |
4626 | ||
4627 | if (r != 2) | |
4628 | return -EINVAL; | |
4629 | ||
4630 | /* Only return this if it is really good enough for us. */ | |
4631 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4632 | return -ENOMEM; | |
4633 | ||
4634 | r = access(p, F_OK); | |
4635 | free(p); | |
4636 | ||
4637 | if (r >= 0) { | |
4638 | *ret = makedev(m, n); | |
4639 | return 0; | |
4640 | } | |
4641 | ||
4642 | return -ENOENT; | |
4643 | } | |
4644 | ||
8d53b453 | 4645 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4646 | struct stat st; |
4647 | ||
4648 | assert(p); | |
4649 | ||
4650 | if (lstat(p, &st) < 0) | |
4651 | return -errno; | |
4652 | ||
4653 | return | |
8d53b453 | 4654 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4655 | (st.st_mode & S_ISVTX); |
4656 | } | |
94959f0f | 4657 | |
f41607a6 LP |
4658 | static const char *const ioprio_class_table[] = { |
4659 | [IOPRIO_CLASS_NONE] = "none", | |
4660 | [IOPRIO_CLASS_RT] = "realtime", | |
4661 | [IOPRIO_CLASS_BE] = "best-effort", | |
4662 | [IOPRIO_CLASS_IDLE] = "idle" | |
4663 | }; | |
4664 | ||
f8b69d1d | 4665 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4666 | |
4667 | static const char *const sigchld_code_table[] = { | |
4668 | [CLD_EXITED] = "exited", | |
4669 | [CLD_KILLED] = "killed", | |
4670 | [CLD_DUMPED] = "dumped", | |
4671 | [CLD_TRAPPED] = "trapped", | |
4672 | [CLD_STOPPED] = "stopped", | |
4673 | [CLD_CONTINUED] = "continued", | |
4674 | }; | |
4675 | ||
4676 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4677 | ||
4678 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4679 | [LOG_FAC(LOG_KERN)] = "kern", | |
4680 | [LOG_FAC(LOG_USER)] = "user", | |
4681 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4682 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4683 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4684 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4685 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4686 | [LOG_FAC(LOG_NEWS)] = "news", | |
4687 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4688 | [LOG_FAC(LOG_CRON)] = "cron", | |
4689 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4690 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4691 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4692 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4693 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4694 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4695 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4696 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4697 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4698 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4699 | }; | |
4700 | ||
f8b69d1d | 4701 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4702 | |
4703 | static const char *const log_level_table[] = { | |
4704 | [LOG_EMERG] = "emerg", | |
4705 | [LOG_ALERT] = "alert", | |
4706 | [LOG_CRIT] = "crit", | |
4707 | [LOG_ERR] = "err", | |
4708 | [LOG_WARNING] = "warning", | |
4709 | [LOG_NOTICE] = "notice", | |
4710 | [LOG_INFO] = "info", | |
4711 | [LOG_DEBUG] = "debug" | |
4712 | }; | |
4713 | ||
f8b69d1d | 4714 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4715 | |
4716 | static const char* const sched_policy_table[] = { | |
4717 | [SCHED_OTHER] = "other", | |
4718 | [SCHED_BATCH] = "batch", | |
4719 | [SCHED_IDLE] = "idle", | |
4720 | [SCHED_FIFO] = "fifo", | |
4721 | [SCHED_RR] = "rr" | |
4722 | }; | |
4723 | ||
f8b69d1d | 4724 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 | 4725 | |
517d56b1 | 4726 | static const char* const rlimit_table[_RLIMIT_MAX] = { |
f41607a6 LP |
4727 | [RLIMIT_CPU] = "LimitCPU", |
4728 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4729 | [RLIMIT_DATA] = "LimitDATA", | |
4730 | [RLIMIT_STACK] = "LimitSTACK", | |
4731 | [RLIMIT_CORE] = "LimitCORE", | |
4732 | [RLIMIT_RSS] = "LimitRSS", | |
4733 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4734 | [RLIMIT_AS] = "LimitAS", | |
4735 | [RLIMIT_NPROC] = "LimitNPROC", | |
4736 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4737 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4738 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4739 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4740 | [RLIMIT_NICE] = "LimitNICE", | |
4741 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4742 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4743 | }; | |
4744 | ||
4745 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4746 | ||
4747 | static const char* const ip_tos_table[] = { | |
4748 | [IPTOS_LOWDELAY] = "low-delay", | |
4749 | [IPTOS_THROUGHPUT] = "throughput", | |
4750 | [IPTOS_RELIABILITY] = "reliability", | |
4751 | [IPTOS_LOWCOST] = "low-cost", | |
4752 | }; | |
4753 | ||
f8b69d1d | 4754 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4755 | |
4e240ab0 | 4756 | static const char *const __signal_table[] = { |
f41607a6 LP |
4757 | [SIGHUP] = "HUP", |
4758 | [SIGINT] = "INT", | |
4759 | [SIGQUIT] = "QUIT", | |
4760 | [SIGILL] = "ILL", | |
4761 | [SIGTRAP] = "TRAP", | |
4762 | [SIGABRT] = "ABRT", | |
4763 | [SIGBUS] = "BUS", | |
4764 | [SIGFPE] = "FPE", | |
4765 | [SIGKILL] = "KILL", | |
4766 | [SIGUSR1] = "USR1", | |
4767 | [SIGSEGV] = "SEGV", | |
4768 | [SIGUSR2] = "USR2", | |
4769 | [SIGPIPE] = "PIPE", | |
4770 | [SIGALRM] = "ALRM", | |
4771 | [SIGTERM] = "TERM", | |
4772 | #ifdef SIGSTKFLT | |
4773 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4774 | #endif | |
4775 | [SIGCHLD] = "CHLD", | |
4776 | [SIGCONT] = "CONT", | |
4777 | [SIGSTOP] = "STOP", | |
4778 | [SIGTSTP] = "TSTP", | |
4779 | [SIGTTIN] = "TTIN", | |
4780 | [SIGTTOU] = "TTOU", | |
4781 | [SIGURG] = "URG", | |
4782 | [SIGXCPU] = "XCPU", | |
4783 | [SIGXFSZ] = "XFSZ", | |
4784 | [SIGVTALRM] = "VTALRM", | |
4785 | [SIGPROF] = "PROF", | |
4786 | [SIGWINCH] = "WINCH", | |
4787 | [SIGIO] = "IO", | |
4788 | [SIGPWR] = "PWR", | |
4789 | [SIGSYS] = "SYS" | |
4790 | }; | |
4791 | ||
4e240ab0 MS |
4792 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4793 | ||
4794 | const char *signal_to_string(int signo) { | |
ec202eae | 4795 | static thread_local char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1]; |
4e240ab0 MS |
4796 | const char *name; |
4797 | ||
4798 | name = __signal_to_string(signo); | |
4799 | if (name) | |
4800 | return name; | |
4801 | ||
4802 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
fa70beaa | 4803 | snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN); |
4e240ab0 | 4804 | else |
fa70beaa LP |
4805 | snprintf(buf, sizeof(buf), "%d", signo); |
4806 | ||
4e240ab0 MS |
4807 | return buf; |
4808 | } | |
4809 | ||
4810 | int signal_from_string(const char *s) { | |
4811 | int signo; | |
4812 | int offset = 0; | |
4813 | unsigned u; | |
4814 | ||
040f18ea | 4815 | signo = __signal_from_string(s); |
4e240ab0 MS |
4816 | if (signo > 0) |
4817 | return signo; | |
4818 | ||
4819 | if (startswith(s, "RTMIN+")) { | |
4820 | s += 6; | |
4821 | offset = SIGRTMIN; | |
4822 | } | |
4823 | if (safe_atou(s, &u) >= 0) { | |
4824 | signo = (int) u + offset; | |
4825 | if (signo > 0 && signo < _NSIG) | |
4826 | return signo; | |
4827 | } | |
4828 | return -1; | |
4829 | } | |
65457142 FC |
4830 | |
4831 | bool kexec_loaded(void) { | |
4832 | bool loaded = false; | |
4833 | char *s; | |
4834 | ||
4835 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
4836 | if (s[0] == '1') | |
4837 | loaded = true; | |
4838 | free(s); | |
4839 | } | |
4840 | return loaded; | |
4841 | } | |
fb9de93d LP |
4842 | |
4843 | int strdup_or_null(const char *a, char **b) { | |
4844 | char *c; | |
4845 | ||
4846 | assert(b); | |
4847 | ||
4848 | if (!a) { | |
4849 | *b = NULL; | |
4850 | return 0; | |
4851 | } | |
4852 | ||
4853 | c = strdup(a); | |
4854 | if (!c) | |
4855 | return -ENOMEM; | |
4856 | ||
4857 | *b = c; | |
4858 | return 0; | |
4859 | } | |
64685e0c | 4860 | |
87d2c1ff LP |
4861 | int prot_from_flags(int flags) { |
4862 | ||
4863 | switch (flags & O_ACCMODE) { | |
4864 | ||
4865 | case O_RDONLY: | |
4866 | return PROT_READ; | |
4867 | ||
4868 | case O_WRONLY: | |
4869 | return PROT_WRITE; | |
4870 | ||
4871 | case O_RDWR: | |
4872 | return PROT_READ|PROT_WRITE; | |
4873 | ||
4874 | default: | |
4875 | return -EINVAL; | |
4876 | } | |
7c99e0c1 | 4877 | } |
689b9a22 | 4878 | |
babfc091 | 4879 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 4880 | unsigned i; |
babfc091 LP |
4881 | |
4882 | static const struct { | |
4883 | const char *suffix; | |
4884 | off_t factor; | |
4885 | } table[] = { | |
32895bb3 LP |
4886 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
4887 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
4888 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
4889 | { "G", 1024ULL*1024ULL*1024ULL }, | |
4890 | { "M", 1024ULL*1024ULL }, | |
4891 | { "K", 1024ULL }, | |
4892 | }; | |
4893 | ||
4894 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
4895 | ||
4896 | if (t >= table[i].factor) { | |
4897 | snprintf(buf, l, | |
4898 | "%llu.%llu%s", | |
4899 | (unsigned long long) (t / table[i].factor), | |
4900 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
4901 | table[i].suffix); | |
4902 | ||
4903 | goto finish; | |
4904 | } | |
4905 | } | |
4906 | ||
4907 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
4908 | ||
4909 | finish: | |
4910 | buf[l-1] = 0; | |
4911 | return buf; | |
4912 | ||
4913 | } | |
55d7bfc1 LP |
4914 | |
4915 | void* memdup(const void *p, size_t l) { | |
4916 | void *r; | |
4917 | ||
4918 | assert(p); | |
4919 | ||
4920 | r = malloc(l); | |
4921 | if (!r) | |
4922 | return NULL; | |
4923 | ||
4924 | memcpy(r, p, l); | |
4925 | return r; | |
4926 | } | |
bb99a35a LP |
4927 | |
4928 | int fd_inc_sndbuf(int fd, size_t n) { | |
4929 | int r, value; | |
4930 | socklen_t l = sizeof(value); | |
4931 | ||
4932 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
92d75ca4 | 4933 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
4934 | return 0; |
4935 | ||
92d75ca4 LP |
4936 | /* If we have the privileges we will ignore the kernel limit. */ |
4937 | ||
bb99a35a | 4938 | value = (int) n; |
92d75ca4 LP |
4939 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) |
4940 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) | |
4941 | return -errno; | |
bb99a35a LP |
4942 | |
4943 | return 1; | |
4944 | } | |
4945 | ||
4946 | int fd_inc_rcvbuf(int fd, size_t n) { | |
4947 | int r, value; | |
4948 | socklen_t l = sizeof(value); | |
4949 | ||
4950 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
92d75ca4 | 4951 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
4952 | return 0; |
4953 | ||
92d75ca4 | 4954 | /* If we have the privileges we will ignore the kernel limit. */ |
bb99a35a | 4955 | |
92d75ca4 LP |
4956 | value = (int) n; |
4957 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) | |
4958 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) | |
4959 | return -errno; | |
bb99a35a LP |
4960 | return 1; |
4961 | } | |
6bb92a16 | 4962 | |
9bdc770c | 4963 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
4964 | pid_t parent_pid, agent_pid; |
4965 | int fd; | |
4966 | bool stdout_is_tty, stderr_is_tty; | |
4967 | unsigned n, i; | |
4968 | va_list ap; | |
4969 | char **l; | |
4970 | ||
4971 | assert(pid); | |
4972 | assert(path); | |
4973 | ||
4974 | parent_pid = getpid(); | |
4975 | ||
4976 | /* Spawns a temporary TTY agent, making sure it goes away when | |
4977 | * we go away */ | |
4978 | ||
4979 | agent_pid = fork(); | |
4980 | if (agent_pid < 0) | |
4981 | return -errno; | |
4982 | ||
4983 | if (agent_pid != 0) { | |
4984 | *pid = agent_pid; | |
4985 | return 0; | |
4986 | } | |
4987 | ||
4988 | /* In the child: | |
4989 | * | |
4990 | * Make sure the agent goes away when the parent dies */ | |
4991 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
4992 | _exit(EXIT_FAILURE); | |
4993 | ||
4994 | /* Check whether our parent died before we were able | |
4995 | * to set the death signal */ | |
4996 | if (getppid() != parent_pid) | |
4997 | _exit(EXIT_SUCCESS); | |
4998 | ||
4999 | /* Don't leak fds to the agent */ | |
9bdc770c | 5000 | close_all_fds(except, n_except); |
6bb92a16 LP |
5001 | |
5002 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5003 | stderr_is_tty = isatty(STDERR_FILENO); | |
5004 | ||
5005 | if (!stdout_is_tty || !stderr_is_tty) { | |
5006 | /* Detach from stdout/stderr. and reopen | |
5007 | * /dev/tty for them. This is important to | |
5008 | * ensure that when systemctl is started via | |
5009 | * popen() or a similar call that expects to | |
5010 | * read EOF we actually do generate EOF and | |
5011 | * not delay this indefinitely by because we | |
5012 | * keep an unused copy of stdin around. */ | |
5013 | fd = open("/dev/tty", O_WRONLY); | |
5014 | if (fd < 0) { | |
5015 | log_error("Failed to open /dev/tty: %m"); | |
5016 | _exit(EXIT_FAILURE); | |
5017 | } | |
5018 | ||
5019 | if (!stdout_is_tty) | |
5020 | dup2(fd, STDOUT_FILENO); | |
5021 | ||
5022 | if (!stderr_is_tty) | |
5023 | dup2(fd, STDERR_FILENO); | |
5024 | ||
5025 | if (fd > 2) | |
5026 | close(fd); | |
5027 | } | |
5028 | ||
5029 | /* Count arguments */ | |
5030 | va_start(ap, path); | |
5031 | for (n = 0; va_arg(ap, char*); n++) | |
5032 | ; | |
5033 | va_end(ap); | |
5034 | ||
5035 | /* Allocate strv */ | |
5036 | l = alloca(sizeof(char *) * (n + 1)); | |
5037 | ||
5038 | /* Fill in arguments */ | |
5039 | va_start(ap, path); | |
5040 | for (i = 0; i <= n; i++) | |
5041 | l[i] = va_arg(ap, char*); | |
5042 | va_end(ap); | |
5043 | ||
5044 | execv(path, l); | |
5045 | _exit(EXIT_FAILURE); | |
5046 | } | |
68faf98c LP |
5047 | |
5048 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5049 | struct rlimit highest, fixed; | |
5050 | ||
5051 | assert(rlim); | |
5052 | ||
5053 | if (setrlimit(resource, rlim) >= 0) | |
5054 | return 0; | |
5055 | ||
5056 | if (errno != EPERM) | |
5057 | return -errno; | |
5058 | ||
5059 | /* So we failed to set the desired setrlimit, then let's try | |
5060 | * to get as close as we can */ | |
5061 | assert_se(getrlimit(resource, &highest) == 0); | |
5062 | ||
5063 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5064 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5065 | ||
5066 | if (setrlimit(resource, &fixed) < 0) | |
5067 | return -errno; | |
5068 | ||
5069 | return 0; | |
5070 | } | |
3d9a4122 | 5071 | |
ab94af92 | 5072 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
49aa47c7 LP |
5073 | _cleanup_fclose_ FILE *f = NULL; |
5074 | char *value = NULL; | |
ab94af92 | 5075 | int r; |
ab94af92 LP |
5076 | bool done = false; |
5077 | size_t l; | |
49aa47c7 | 5078 | const char *path; |
ab94af92 | 5079 | |
49aa47c7 | 5080 | assert(pid >= 0); |
ab94af92 LP |
5081 | assert(field); |
5082 | assert(_value); | |
5083 | ||
b68fa010 | 5084 | path = procfs_file_alloca(pid, "environ"); |
ab94af92 LP |
5085 | |
5086 | f = fopen(path, "re"); | |
5087 | if (!f) | |
5088 | return -errno; | |
5089 | ||
5090 | l = strlen(field); | |
5091 | r = 0; | |
5092 | ||
5093 | do { | |
5094 | char line[LINE_MAX]; | |
5095 | unsigned i; | |
5096 | ||
5097 | for (i = 0; i < sizeof(line)-1; i++) { | |
5098 | int c; | |
5099 | ||
5100 | c = getc(f); | |
5101 | if (_unlikely_(c == EOF)) { | |
5102 | done = true; | |
5103 | break; | |
5104 | } else if (c == 0) | |
5105 | break; | |
5106 | ||
5107 | line[i] = c; | |
5108 | } | |
5109 | line[i] = 0; | |
5110 | ||
5111 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5112 | value = strdup(line + l + 1); | |
49aa47c7 LP |
5113 | if (!value) |
5114 | return -ENOMEM; | |
ab94af92 LP |
5115 | |
5116 | r = 1; | |
5117 | break; | |
5118 | } | |
5119 | ||
5120 | } while (!done); | |
5121 | ||
49aa47c7 | 5122 | *_value = value; |
ab94af92 LP |
5123 | return r; |
5124 | } | |
d889a206 | 5125 | |
49dbfa7b LP |
5126 | bool is_valid_documentation_url(const char *url) { |
5127 | assert(url); | |
5128 | ||
5129 | if (startswith(url, "http://") && url[7]) | |
5130 | return true; | |
5131 | ||
5132 | if (startswith(url, "https://") && url[8]) | |
5133 | return true; | |
5134 | ||
5135 | if (startswith(url, "file:") && url[5]) | |
5136 | return true; | |
5137 | ||
5138 | if (startswith(url, "info:") && url[5]) | |
5139 | return true; | |
5140 | ||
5141 | if (startswith(url, "man:") && url[4]) | |
5142 | return true; | |
5143 | ||
5144 | return false; | |
5145 | } | |
9be346c9 HH |
5146 | |
5147 | bool in_initrd(void) { | |
73020ab2 | 5148 | static int saved = -1; |
825c6fe5 | 5149 | struct statfs s; |
8f33b5b8 | 5150 | |
825c6fe5 LP |
5151 | if (saved >= 0) |
5152 | return saved; | |
5153 | ||
5154 | /* We make two checks here: | |
5155 | * | |
5156 | * 1. the flag file /etc/initrd-release must exist | |
5157 | * 2. the root file system must be a memory file system | |
5158 | * | |
5159 | * The second check is extra paranoia, since misdetecting an | |
5160 | * initrd can have bad bad consequences due the initrd | |
5161 | * emptying when transititioning to the main systemd. | |
5162 | */ | |
5163 | ||
5164 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5165 | statfs("/", &s) >= 0 && | |
943aad8c | 5166 | is_temporary_fs(&s); |
9be346c9 | 5167 | |
8f33b5b8 | 5168 | return saved; |
9be346c9 | 5169 | } |
069cfc85 LP |
5170 | |
5171 | void warn_melody(void) { | |
e67f47e5 | 5172 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5173 | |
5174 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5175 | if (fd < 0) | |
5176 | return; | |
5177 | ||
040f18ea | 5178 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5179 | |
5180 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5181 | usleep(125*USEC_PER_MSEC); | |
5182 | ||
5183 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5184 | usleep(125*USEC_PER_MSEC); | |
5185 | ||
5186 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5187 | usleep(125*USEC_PER_MSEC); | |
5188 | ||
5189 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5190 | } |
cd3bd60a LP |
5191 | |
5192 | int make_console_stdio(void) { | |
5193 | int fd, r; | |
5194 | ||
5195 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5196 | ||
5197 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5198 | if (fd < 0) { | |
5199 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5200 | return fd; | |
5201 | } | |
5202 | ||
5203 | r = make_stdio(fd); | |
5204 | if (r < 0) { | |
5205 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5206 | return r; | |
5207 | } | |
5208 | ||
5209 | return 0; | |
5210 | } | |
7c5f152a LP |
5211 | |
5212 | int get_home_dir(char **_h) { | |
2cfbd749 | 5213 | struct passwd *p; |
7c5f152a | 5214 | const char *e; |
2cfbd749 | 5215 | char *h; |
7c5f152a | 5216 | uid_t u; |
7c5f152a LP |
5217 | |
5218 | assert(_h); | |
5219 | ||
5220 | /* Take the user specified one */ | |
5221 | e = getenv("HOME"); | |
5222 | if (e) { | |
5223 | h = strdup(e); | |
5224 | if (!h) | |
5225 | return -ENOMEM; | |
5226 | ||
5227 | *_h = h; | |
5228 | return 0; | |
5229 | } | |
5230 | ||
5231 | /* Hardcode home directory for root to avoid NSS */ | |
5232 | u = getuid(); | |
5233 | if (u == 0) { | |
5234 | h = strdup("/root"); | |
5235 | if (!h) | |
5236 | return -ENOMEM; | |
5237 | ||
5238 | *_h = h; | |
5239 | return 0; | |
5240 | } | |
5241 | ||
5242 | /* Check the database... */ | |
5243 | errno = 0; | |
5244 | p = getpwuid(u); | |
5245 | if (!p) | |
bcb161b0 | 5246 | return errno > 0 ? -errno : -ESRCH; |
7c5f152a LP |
5247 | |
5248 | if (!path_is_absolute(p->pw_dir)) | |
5249 | return -EINVAL; | |
5250 | ||
5251 | h = strdup(p->pw_dir); | |
5252 | if (!h) | |
5253 | return -ENOMEM; | |
5254 | ||
5255 | *_h = h; | |
5256 | return 0; | |
5257 | } | |
5258 | ||
2cfbd749 LP |
5259 | int get_shell(char **_s) { |
5260 | struct passwd *p; | |
5261 | const char *e; | |
5262 | char *s; | |
5263 | uid_t u; | |
5264 | ||
5265 | assert(_s); | |
5266 | ||
5267 | /* Take the user specified one */ | |
5268 | e = getenv("SHELL"); | |
5269 | if (e) { | |
5270 | s = strdup(e); | |
5271 | if (!s) | |
5272 | return -ENOMEM; | |
5273 | ||
5274 | *_s = s; | |
5275 | return 0; | |
5276 | } | |
5277 | ||
5278 | /* Hardcode home directory for root to avoid NSS */ | |
5279 | u = getuid(); | |
5280 | if (u == 0) { | |
5281 | s = strdup("/bin/sh"); | |
5282 | if (!s) | |
5283 | return -ENOMEM; | |
5284 | ||
5285 | *_s = s; | |
5286 | return 0; | |
5287 | } | |
5288 | ||
5289 | /* Check the database... */ | |
5290 | errno = 0; | |
5291 | p = getpwuid(u); | |
5292 | if (!p) | |
5293 | return errno > 0 ? -errno : -ESRCH; | |
5294 | ||
5295 | if (!path_is_absolute(p->pw_shell)) | |
5296 | return -EINVAL; | |
5297 | ||
5298 | s = strdup(p->pw_shell); | |
5299 | if (!s) | |
5300 | return -ENOMEM; | |
5301 | ||
5302 | *_s = s; | |
5303 | return 0; | |
5304 | } | |
5305 | ||
0b507b17 LP |
5306 | bool filename_is_safe(const char *p) { |
5307 | ||
5308 | if (isempty(p)) | |
5309 | return false; | |
5310 | ||
5311 | if (strchr(p, '/')) | |
5312 | return false; | |
5313 | ||
5314 | if (streq(p, ".")) | |
5315 | return false; | |
5316 | ||
5317 | if (streq(p, "..")) | |
5318 | return false; | |
5319 | ||
5320 | if (strlen(p) > FILENAME_MAX) | |
5321 | return false; | |
5322 | ||
5323 | return true; | |
5324 | } | |
5325 | ||
5326 | bool string_is_safe(const char *p) { | |
5327 | const char *t; | |
5328 | ||
5329 | assert(p); | |
5330 | ||
5331 | for (t = p; *t; t++) { | |
01539d6e | 5332 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5333 | return false; |
5334 | ||
011afa76 | 5335 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5336 | return false; |
5337 | } | |
5338 | ||
5339 | return true; | |
5340 | } | |
cfbc22ab | 5341 | |
ac4c8d6d ZJS |
5342 | /** |
5343 | * Check if a string contains control characters. | |
5344 | * Spaces and tabs are not considered control characters. | |
5345 | */ | |
4d1a6904 LP |
5346 | bool string_has_cc(const char *p) { |
5347 | const char *t; | |
5348 | ||
5349 | assert(p); | |
5350 | ||
5351 | for (t = p; *t; t++) | |
da2620a5 | 5352 | if (*t > 0 && *t < ' ' && *t != '\t') |
4d1a6904 LP |
5353 | return true; |
5354 | ||
5355 | return false; | |
5356 | } | |
5357 | ||
e884315e LP |
5358 | bool path_is_safe(const char *p) { |
5359 | ||
5360 | if (isempty(p)) | |
5361 | return false; | |
5362 | ||
5363 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5364 | return false; | |
5365 | ||
5366 | if (strlen(p) > PATH_MAX) | |
5367 | return false; | |
5368 | ||
5369 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5370 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5371 | return false; | |
5372 | ||
5373 | if (strstr(p, "//")) | |
5374 | return false; | |
5375 | ||
5376 | return true; | |
5377 | } | |
5378 | ||
a9e12476 KS |
5379 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5380 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5381 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5382 | size_t l, u, idx; |
5383 | const void *p; | |
5384 | int comparison; | |
5385 | ||
5386 | l = 0; | |
5387 | u = nmemb; | |
5388 | while (l < u) { | |
5389 | idx = (l + u) / 2; | |
5390 | p = (void *)(((const char *) base) + (idx * size)); | |
5391 | comparison = compar(key, p, arg); | |
5392 | if (comparison < 0) | |
5393 | u = idx; | |
5394 | else if (comparison > 0) | |
5395 | l = idx + 1; | |
5396 | else | |
5397 | return (void *)p; | |
5398 | } | |
5399 | return NULL; | |
5400 | } | |
09017585 MS |
5401 | |
5402 | bool is_locale_utf8(void) { | |
5403 | const char *set; | |
5404 | static int cached_answer = -1; | |
5405 | ||
5406 | if (cached_answer >= 0) | |
5407 | goto out; | |
5408 | ||
5409 | if (!setlocale(LC_ALL, "")) { | |
5410 | cached_answer = true; | |
5411 | goto out; | |
5412 | } | |
5413 | ||
5414 | set = nl_langinfo(CODESET); | |
5415 | if (!set) { | |
5416 | cached_answer = true; | |
5417 | goto out; | |
5418 | } | |
5419 | ||
f168c273 | 5420 | if (streq(set, "UTF-8")) { |
fee79e01 HH |
5421 | cached_answer = true; |
5422 | goto out; | |
5423 | } | |
5424 | ||
6cf2f1d9 HH |
5425 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
5426 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
5427 | set = setlocale(LC_CTYPE, NULL); |
5428 | if (!set) { | |
5429 | cached_answer = true; | |
5430 | goto out; | |
5431 | } | |
5432 | ||
6cf2f1d9 HH |
5433 | /* Check result, but ignore the result if C was set |
5434 | * explicitly. */ | |
5435 | cached_answer = | |
5436 | streq(set, "C") && | |
5437 | !getenv("LC_ALL") && | |
5438 | !getenv("LC_CTYPE") && | |
5439 | !getenv("LANG"); | |
fee79e01 | 5440 | |
09017585 | 5441 | out: |
6cf2f1d9 | 5442 | return (bool) cached_answer; |
09017585 | 5443 | } |
c339d977 MS |
5444 | |
5445 | const char *draw_special_char(DrawSpecialChar ch) { | |
5446 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
5447 | /* UTF-8 */ { | |
45a5ff0d MS |
5448 | [DRAW_TREE_VERT] = "\342\224\202 ", /* │ */ |
5449 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ | |
5450 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5451 | [DRAW_TREE_SPACE] = " ", /* */ |
45a5ff0d | 5452 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243 ", /* ‣ */ |
3deadb91 | 5453 | [DRAW_BLACK_CIRCLE] = "\342\227\217 ", /* ● */ |
c339d977 MS |
5454 | }, |
5455 | /* ASCII fallback */ { | |
45a5ff0d MS |
5456 | [DRAW_TREE_VERT] = "| ", |
5457 | [DRAW_TREE_BRANCH] = "|-", | |
5458 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5459 | [DRAW_TREE_SPACE] = " ", |
45a5ff0d | 5460 | [DRAW_TRIANGULAR_BULLET] = "> ", |
3deadb91 | 5461 | [DRAW_BLACK_CIRCLE] = "* ", |
c339d977 MS |
5462 | } |
5463 | }; | |
5464 | ||
5465 | return draw_table[!is_locale_utf8()][ch]; | |
5466 | } | |
409bc9c3 LP |
5467 | |
5468 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5469 | const char *f; | |
5470 | char *t, *r; | |
5471 | size_t l, old_len, new_len; | |
5472 | ||
5473 | assert(text); | |
5474 | assert(old_string); | |
5475 | assert(new_string); | |
5476 | ||
5477 | old_len = strlen(old_string); | |
5478 | new_len = strlen(new_string); | |
5479 | ||
5480 | l = strlen(text); | |
5481 | r = new(char, l+1); | |
5482 | if (!r) | |
5483 | return NULL; | |
5484 | ||
5485 | f = text; | |
5486 | t = r; | |
5487 | while (*f) { | |
5488 | char *a; | |
5489 | size_t d, nl; | |
5490 | ||
5491 | if (!startswith(f, old_string)) { | |
5492 | *(t++) = *(f++); | |
5493 | continue; | |
5494 | } | |
5495 | ||
5496 | d = t - r; | |
5497 | nl = l - old_len + new_len; | |
5498 | a = realloc(r, nl + 1); | |
5499 | if (!a) | |
5500 | goto oom; | |
5501 | ||
5502 | l = nl; | |
5503 | r = a; | |
5504 | t = r + d; | |
5505 | ||
5506 | t = stpcpy(t, new_string); | |
5507 | f += old_len; | |
5508 | } | |
5509 | ||
5510 | *t = 0; | |
5511 | return r; | |
5512 | ||
5513 | oom: | |
5514 | free(r); | |
5515 | return NULL; | |
5516 | } | |
e8bc0ea2 LP |
5517 | |
5518 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5519 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5520 | enum { |
5521 | STATE_OTHER, | |
5522 | STATE_ESCAPE, | |
5523 | STATE_BRACKET | |
5524 | } state = STATE_OTHER; | |
5525 | char *obuf = NULL; | |
5526 | size_t osz = 0, isz; | |
5527 | FILE *f; | |
5528 | ||
5529 | assert(ibuf); | |
5530 | assert(*ibuf); | |
5531 | ||
5532 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5533 | ||
5534 | isz = _isz ? *_isz : strlen(*ibuf); | |
5535 | ||
5536 | f = open_memstream(&obuf, &osz); | |
5537 | if (!f) | |
5538 | return NULL; | |
5539 | ||
5540 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5541 | ||
5542 | switch (state) { | |
5543 | ||
5544 | case STATE_OTHER: | |
5545 | if (i >= *ibuf + isz) /* EOT */ | |
5546 | break; | |
5547 | else if (*i == '\x1B') | |
5548 | state = STATE_ESCAPE; | |
5549 | else if (*i == '\t') | |
5550 | fputs(" ", f); | |
5551 | else | |
5552 | fputc(*i, f); | |
5553 | break; | |
5554 | ||
5555 | case STATE_ESCAPE: | |
5556 | if (i >= *ibuf + isz) { /* EOT */ | |
5557 | fputc('\x1B', f); | |
5558 | break; | |
5559 | } else if (*i == '[') { | |
5560 | state = STATE_BRACKET; | |
5561 | begin = i + 1; | |
5562 | } else { | |
5563 | fputc('\x1B', f); | |
5564 | fputc(*i, f); | |
5565 | state = STATE_OTHER; | |
5566 | } | |
5567 | ||
5568 | break; | |
5569 | ||
5570 | case STATE_BRACKET: | |
5571 | ||
5572 | if (i >= *ibuf + isz || /* EOT */ | |
5573 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5574 | fputc('\x1B', f); | |
5575 | fputc('[', f); | |
5576 | state = STATE_OTHER; | |
5577 | i = begin-1; | |
5578 | } else if (*i == 'm') | |
5579 | state = STATE_OTHER; | |
5580 | break; | |
5581 | } | |
5582 | } | |
5583 | ||
5584 | if (ferror(f)) { | |
5585 | fclose(f); | |
5586 | free(obuf); | |
5587 | return NULL; | |
5588 | } | |
5589 | ||
5590 | fclose(f); | |
5591 | ||
5592 | free(*ibuf); | |
5593 | *ibuf = obuf; | |
5594 | ||
5595 | if (_isz) | |
5596 | *_isz = osz; | |
5597 | ||
5598 | return obuf; | |
5599 | } | |
240dbaa4 LP |
5600 | |
5601 | int on_ac_power(void) { | |
5602 | bool found_offline = false, found_online = false; | |
5603 | _cleanup_closedir_ DIR *d = NULL; | |
5604 | ||
5605 | d = opendir("/sys/class/power_supply"); | |
5606 | if (!d) | |
5607 | return -errno; | |
5608 | ||
5609 | for (;;) { | |
5610 | struct dirent *de; | |
240dbaa4 LP |
5611 | _cleanup_close_ int fd = -1, device = -1; |
5612 | char contents[6]; | |
5613 | ssize_t n; | |
240dbaa4 | 5614 | |
3fd11280 FW |
5615 | errno = 0; |
5616 | de = readdir(d); | |
5617 | if (!de && errno != 0) | |
5618 | return -errno; | |
240dbaa4 LP |
5619 | |
5620 | if (!de) | |
5621 | break; | |
5622 | ||
5623 | if (ignore_file(de->d_name)) | |
5624 | continue; | |
5625 | ||
5626 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5627 | if (device < 0) { | |
5628 | if (errno == ENOENT || errno == ENOTDIR) | |
5629 | continue; | |
5630 | ||
5631 | return -errno; | |
5632 | } | |
5633 | ||
5634 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5635 | if (fd < 0) { | |
5636 | if (errno == ENOENT) | |
5637 | continue; | |
5638 | ||
5639 | return -errno; | |
5640 | } | |
5641 | ||
5642 | n = read(fd, contents, sizeof(contents)); | |
5643 | if (n < 0) | |
5644 | return -errno; | |
5645 | ||
5646 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5647 | continue; | |
5648 | ||
03e334a1 | 5649 | safe_close(fd); |
240dbaa4 LP |
5650 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
5651 | if (fd < 0) { | |
5652 | if (errno == ENOENT) | |
5653 | continue; | |
5654 | ||
5655 | return -errno; | |
5656 | } | |
5657 | ||
5658 | n = read(fd, contents, sizeof(contents)); | |
5659 | if (n < 0) | |
5660 | return -errno; | |
5661 | ||
5662 | if (n != 2 || contents[1] != '\n') | |
5663 | return -EIO; | |
5664 | ||
5665 | if (contents[0] == '1') { | |
5666 | found_online = true; | |
5667 | break; | |
5668 | } else if (contents[0] == '0') | |
5669 | found_offline = true; | |
5670 | else | |
5671 | return -EIO; | |
5672 | } | |
5673 | ||
5674 | return found_online || !found_offline; | |
5675 | } | |
fabe5c0e | 5676 | |
4cf7ea55 | 5677 | static int search_and_fopen_internal(const char *path, const char *mode, const char *root, char **search, FILE **_f) { |
fabe5c0e LP |
5678 | char **i; |
5679 | ||
5680 | assert(path); | |
5681 | assert(mode); | |
5682 | assert(_f); | |
5683 | ||
4cf7ea55 | 5684 | if (!path_strv_canonicalize_absolute_uniq(search, root)) |
fabe5c0e LP |
5685 | return -ENOMEM; |
5686 | ||
5687 | STRV_FOREACH(i, search) { | |
5688 | _cleanup_free_ char *p = NULL; | |
5689 | FILE *f; | |
5690 | ||
5691 | p = strjoin(*i, "/", path, NULL); | |
5692 | if (!p) | |
5693 | return -ENOMEM; | |
5694 | ||
5695 | f = fopen(p, mode); | |
5696 | if (f) { | |
5697 | *_f = f; | |
5698 | return 0; | |
5699 | } | |
5700 | ||
5701 | if (errno != ENOENT) | |
5702 | return -errno; | |
5703 | } | |
5704 | ||
5705 | return -ENOENT; | |
5706 | } | |
5707 | ||
4cf7ea55 | 5708 | int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f) { |
fabe5c0e LP |
5709 | _cleanup_strv_free_ char **copy = NULL; |
5710 | ||
5711 | assert(path); | |
5712 | assert(mode); | |
5713 | assert(_f); | |
5714 | ||
5715 | if (path_is_absolute(path)) { | |
5716 | FILE *f; | |
5717 | ||
5718 | f = fopen(path, mode); | |
5719 | if (f) { | |
5720 | *_f = f; | |
5721 | return 0; | |
5722 | } | |
5723 | ||
5724 | return -errno; | |
5725 | } | |
5726 | ||
5727 | copy = strv_copy((char**) search); | |
5728 | if (!copy) | |
5729 | return -ENOMEM; | |
5730 | ||
4cf7ea55 | 5731 | return search_and_fopen_internal(path, mode, root, copy, _f); |
fabe5c0e LP |
5732 | } |
5733 | ||
4cf7ea55 | 5734 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f) { |
fabe5c0e LP |
5735 | _cleanup_strv_free_ char **s = NULL; |
5736 | ||
5737 | if (path_is_absolute(path)) { | |
5738 | FILE *f; | |
5739 | ||
5740 | f = fopen(path, mode); | |
5741 | if (f) { | |
5742 | *_f = f; | |
5743 | return 0; | |
5744 | } | |
5745 | ||
5746 | return -errno; | |
5747 | } | |
5748 | ||
5749 | s = strv_split_nulstr(search); | |
5750 | if (!s) | |
5751 | return -ENOMEM; | |
5752 | ||
4cf7ea55 | 5753 | return search_and_fopen_internal(path, mode, root, s, _f); |
fabe5c0e | 5754 | } |
c17ec25e | 5755 | |
66e35261 LP |
5756 | char *strextend(char **x, ...) { |
5757 | va_list ap; | |
5758 | size_t f, l; | |
5759 | char *r, *p; | |
5760 | ||
5761 | assert(x); | |
5762 | ||
5763 | l = f = *x ? strlen(*x) : 0; | |
5764 | ||
5765 | va_start(ap, x); | |
5766 | for (;;) { | |
5767 | const char *t; | |
5768 | size_t n; | |
5769 | ||
5770 | t = va_arg(ap, const char *); | |
5771 | if (!t) | |
5772 | break; | |
5773 | ||
5774 | n = strlen(t); | |
5775 | if (n > ((size_t) -1) - l) { | |
5776 | va_end(ap); | |
5777 | return NULL; | |
5778 | } | |
5779 | ||
5780 | l += n; | |
5781 | } | |
5782 | va_end(ap); | |
5783 | ||
5784 | r = realloc(*x, l+1); | |
5785 | if (!r) | |
5786 | return NULL; | |
5787 | ||
5788 | p = r + f; | |
5789 | ||
5790 | va_start(ap, x); | |
5791 | for (;;) { | |
5792 | const char *t; | |
5793 | ||
5794 | t = va_arg(ap, const char *); | |
5795 | if (!t) | |
5796 | break; | |
5797 | ||
5798 | p = stpcpy(p, t); | |
5799 | } | |
5800 | va_end(ap); | |
5801 | ||
5802 | *p = 0; | |
5803 | *x = r; | |
5804 | ||
5805 | return r + l; | |
5806 | } | |
9a17484d LP |
5807 | |
5808 | char *strrep(const char *s, unsigned n) { | |
5809 | size_t l; | |
5810 | char *r, *p; | |
5811 | unsigned i; | |
5812 | ||
5813 | assert(s); | |
5814 | ||
5815 | l = strlen(s); | |
5816 | p = r = malloc(l * n + 1); | |
5817 | if (!r) | |
5818 | return NULL; | |
5819 | ||
5820 | for (i = 0; i < n; i++) | |
5821 | p = stpcpy(p, s); | |
5822 | ||
5823 | *p = 0; | |
5824 | return r; | |
5825 | } | |
392d5b37 | 5826 | |
ca2d3784 ZJS |
5827 | void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) { |
5828 | size_t a, newalloc; | |
392d5b37 LP |
5829 | void *q; |
5830 | ||
98088803 | 5831 | assert(p); |
e93c33d4 SL |
5832 | assert(allocated); |
5833 | ||
392d5b37 LP |
5834 | if (*allocated >= need) |
5835 | return *p; | |
5836 | ||
ca2d3784 ZJS |
5837 | newalloc = MAX(need * 2, 64u / size); |
5838 | a = newalloc * size; | |
98088803 LP |
5839 | |
5840 | /* check for overflows */ | |
ca2d3784 | 5841 | if (a < size * need) |
98088803 LP |
5842 | return NULL; |
5843 | ||
392d5b37 LP |
5844 | q = realloc(*p, a); |
5845 | if (!q) | |
5846 | return NULL; | |
5847 | ||
5848 | *p = q; | |
ca2d3784 | 5849 | *allocated = newalloc; |
392d5b37 LP |
5850 | return q; |
5851 | } | |
aa96c6cb | 5852 | |
ca2d3784 | 5853 | void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) { |
98088803 | 5854 | size_t prev; |
4545a231 DH |
5855 | uint8_t *q; |
5856 | ||
98088803 LP |
5857 | assert(p); |
5858 | assert(allocated); | |
5859 | ||
5860 | prev = *allocated; | |
5861 | ||
ca2d3784 | 5862 | q = greedy_realloc(p, allocated, need, size); |
4545a231 DH |
5863 | if (!q) |
5864 | return NULL; | |
5865 | ||
5866 | if (*allocated > prev) | |
ca2d3784 | 5867 | memzero(q + prev * size, (*allocated - prev) * size); |
4545a231 DH |
5868 | |
5869 | return q; | |
5870 | } | |
5871 | ||
aa96c6cb LP |
5872 | bool id128_is_valid(const char *s) { |
5873 | size_t i, l; | |
5874 | ||
5875 | l = strlen(s); | |
5876 | if (l == 32) { | |
5877 | ||
5878 | /* Simple formatted 128bit hex string */ | |
5879 | ||
5880 | for (i = 0; i < l; i++) { | |
5881 | char c = s[i]; | |
5882 | ||
5883 | if (!(c >= '0' && c <= '9') && | |
5884 | !(c >= 'a' && c <= 'z') && | |
5885 | !(c >= 'A' && c <= 'Z')) | |
5886 | return false; | |
5887 | } | |
5888 | ||
5889 | } else if (l == 36) { | |
5890 | ||
5891 | /* Formatted UUID */ | |
5892 | ||
5893 | for (i = 0; i < l; i++) { | |
5894 | char c = s[i]; | |
5895 | ||
5896 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
5897 | if (c != '-') | |
5898 | return false; | |
5899 | } else { | |
5900 | if (!(c >= '0' && c <= '9') && | |
5901 | !(c >= 'a' && c <= 'z') && | |
5902 | !(c >= 'A' && c <= 'Z')) | |
5903 | return false; | |
5904 | } | |
5905 | } | |
5906 | ||
5907 | } else | |
5908 | return false; | |
5909 | ||
5910 | return true; | |
5911 | } | |
7085053a | 5912 | |
d4ac85c6 LP |
5913 | int split_pair(const char *s, const char *sep, char **l, char **r) { |
5914 | char *x, *a, *b; | |
5915 | ||
5916 | assert(s); | |
5917 | assert(sep); | |
5918 | assert(l); | |
5919 | assert(r); | |
5920 | ||
5921 | if (isempty(sep)) | |
5922 | return -EINVAL; | |
5923 | ||
5924 | x = strstr(s, sep); | |
5925 | if (!x) | |
5926 | return -EINVAL; | |
5927 | ||
5928 | a = strndup(s, x - s); | |
5929 | if (!a) | |
5930 | return -ENOMEM; | |
5931 | ||
5932 | b = strdup(x + strlen(sep)); | |
5933 | if (!b) { | |
5934 | free(a); | |
5935 | return -ENOMEM; | |
5936 | } | |
5937 | ||
5938 | *l = a; | |
5939 | *r = b; | |
5940 | ||
5941 | return 0; | |
5942 | } | |
295edddf | 5943 | |
74df0fca | 5944 | int shall_restore_state(void) { |
059cb385 | 5945 | _cleanup_free_ char *line = NULL; |
295edddf | 5946 | char *w, *state; |
295edddf | 5947 | size_t l; |
74df0fca | 5948 | int r; |
295edddf | 5949 | |
74df0fca LP |
5950 | r = proc_cmdline(&line); |
5951 | if (r < 0) | |
5952 | return r; | |
5953 | if (r == 0) /* Container ... */ | |
5954 | return 1; | |
295edddf | 5955 | |
059cb385 | 5956 | r = 1; |
74df0fca | 5957 | |
059cb385 LP |
5958 | FOREACH_WORD_QUOTED(w, l, line, state) { |
5959 | const char *e; | |
5960 | char n[l+1]; | |
5961 | int k; | |
5962 | ||
5963 | memcpy(n, w, l); | |
5964 | n[l] = 0; | |
5965 | ||
5966 | e = startswith(n, "systemd.restore_state="); | |
5967 | if (!e) | |
5968 | continue; | |
5969 | ||
5970 | k = parse_boolean(e); | |
5971 | if (k >= 0) | |
5972 | r = k; | |
5973 | } | |
5974 | ||
5975 | return r; | |
74df0fca LP |
5976 | } |
5977 | ||
5978 | int proc_cmdline(char **ret) { | |
5979 | int r; | |
5980 | ||
5981 | if (detect_container(NULL) > 0) { | |
39883f62 | 5982 | char *buf = NULL, *p; |
02bb6cda LP |
5983 | size_t sz = 0; |
5984 | ||
5985 | r = read_full_file("/proc/1/cmdline", &buf, &sz); | |
5986 | if (r < 0) | |
5987 | return r; | |
5988 | ||
5989 | for (p = buf; p + 1 < buf + sz; p++) | |
5990 | if (*p == 0) | |
5991 | *p = ' '; | |
5992 | ||
059cb385 | 5993 | *p = 0; |
02bb6cda LP |
5994 | *ret = buf; |
5995 | return 1; | |
295edddf TG |
5996 | } |
5997 | ||
74df0fca LP |
5998 | r = read_one_line_file("/proc/cmdline", ret); |
5999 | if (r < 0) | |
6000 | return r; | |
295edddf | 6001 | |
74df0fca | 6002 | return 1; |
295edddf | 6003 | } |
bc9fd78c | 6004 | |
059cb385 | 6005 | int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) { |
141a79f4 ZJS |
6006 | _cleanup_free_ char *line = NULL; |
6007 | char *w, *state; | |
6008 | size_t l; | |
6009 | int r; | |
6010 | ||
059cb385 LP |
6011 | assert(parse_item); |
6012 | ||
141a79f4 ZJS |
6013 | r = proc_cmdline(&line); |
6014 | if (r < 0) | |
6015 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); | |
6016 | if (r <= 0) | |
6017 | return 0; | |
6018 | ||
6019 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
059cb385 | 6020 | char word[l+1], *value; |
141a79f4 | 6021 | |
059cb385 LP |
6022 | memcpy(word, w, l); |
6023 | word[l] = 0; | |
141a79f4 | 6024 | |
059cb385 LP |
6025 | /* Filter out arguments that are intended only for the |
6026 | * initrd */ | |
6027 | if (!in_initrd() && startswith(word, "rd.")) | |
6028 | continue; | |
6029 | ||
6030 | value = strchr(word, '='); | |
6031 | if (value) | |
6032 | *(value++) = 0; | |
6033 | ||
6034 | r = parse_item(word, value); | |
6035 | if (r < 0) | |
141a79f4 | 6036 | return r; |
141a79f4 ZJS |
6037 | } |
6038 | ||
6039 | return 0; | |
6040 | } | |
6041 | ||
bc9fd78c LP |
6042 | int container_get_leader(const char *machine, pid_t *pid) { |
6043 | _cleanup_free_ char *s = NULL, *class = NULL; | |
6044 | const char *p; | |
6045 | pid_t leader; | |
6046 | int r; | |
6047 | ||
6048 | assert(machine); | |
6049 | assert(pid); | |
6050 | ||
6051 | p = strappenda("/run/systemd/machines/", machine); | |
6052 | r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); | |
6053 | if (r == -ENOENT) | |
6054 | return -EHOSTDOWN; | |
6055 | if (r < 0) | |
6056 | return r; | |
6057 | if (!s) | |
6058 | return -EIO; | |
6059 | ||
6060 | if (!streq_ptr(class, "container")) | |
6061 | return -EIO; | |
6062 | ||
6063 | r = parse_pid(s, &leader); | |
6064 | if (r < 0) | |
6065 | return r; | |
6066 | if (leader <= 1) | |
6067 | return -EIO; | |
6068 | ||
6069 | *pid = leader; | |
6070 | return 0; | |
6071 | } | |
6072 | ||
a4475f57 LP |
6073 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd) { |
6074 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1; | |
6075 | const char *pidns, *mntns, *root; | |
bc9fd78c LP |
6076 | int rfd; |
6077 | ||
6078 | assert(pid >= 0); | |
a4475f57 LP |
6079 | assert(pidns_fd); |
6080 | assert(mntns_fd); | |
bc9fd78c LP |
6081 | assert(root_fd); |
6082 | ||
a4475f57 LP |
6083 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
6084 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6085 | if (mntnsfd < 0) | |
6086 | return -errno; | |
6087 | ||
6088 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
6089 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6090 | if (pidnsfd < 0) | |
bc9fd78c LP |
6091 | return -errno; |
6092 | ||
6093 | root = procfs_file_alloca(pid, "root"); | |
6094 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
6095 | if (rfd < 0) | |
6096 | return -errno; | |
6097 | ||
a4475f57 LP |
6098 | *pidns_fd = pidnsfd; |
6099 | *mntns_fd = mntnsfd; | |
bc9fd78c | 6100 | *root_fd = rfd; |
a4475f57 LP |
6101 | pidnsfd = -1; |
6102 | mntnsfd = -1; | |
bc9fd78c LP |
6103 | |
6104 | return 0; | |
6105 | } | |
6106 | ||
a4475f57 LP |
6107 | int namespace_enter(int pidns_fd, int mntns_fd, int root_fd) { |
6108 | assert(pidns_fd >= 0); | |
6109 | assert(mntns_fd >= 0); | |
bc9fd78c LP |
6110 | assert(root_fd >= 0); |
6111 | ||
a4475f57 LP |
6112 | if (setns(pidns_fd, CLONE_NEWPID) < 0) |
6113 | return -errno; | |
6114 | ||
6115 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
bc9fd78c LP |
6116 | return -errno; |
6117 | ||
6118 | if (fchdir(root_fd) < 0) | |
6119 | return -errno; | |
6120 | ||
6121 | if (chroot(".") < 0) | |
6122 | return -errno; | |
6123 | ||
5e2b3214 LP |
6124 | if (setresgid(0, 0, 0) < 0) |
6125 | return -errno; | |
6126 | ||
6127 | if (setresuid(0, 0, 0) < 0) | |
6128 | return -errno; | |
6129 | ||
bc9fd78c LP |
6130 | return 0; |
6131 | } | |
bf108e55 | 6132 | |
9f5650ae LP |
6133 | bool pid_is_unwaited(pid_t pid) { |
6134 | /* Checks whether a PID is still valid at all, including a zombie */ | |
6135 | ||
bf108e55 LP |
6136 | if (pid <= 0) |
6137 | return false; | |
6138 | ||
6139 | if (kill(pid, 0) >= 0) | |
6140 | return true; | |
6141 | ||
6142 | return errno != ESRCH; | |
6143 | } | |
eff05270 | 6144 | |
9f5650ae LP |
6145 | bool pid_is_alive(pid_t pid) { |
6146 | int r; | |
6147 | ||
6148 | /* Checks whether a PID is still valid and not a zombie */ | |
6149 | ||
6150 | if (pid <= 0) | |
6151 | return false; | |
6152 | ||
6153 | r = get_process_state(pid); | |
6154 | if (r == -ENOENT || r == 'Z') | |
6155 | return false; | |
6156 | ||
6157 | return true; | |
6158 | } | |
6159 | ||
eff05270 LP |
6160 | int getpeercred(int fd, struct ucred *ucred) { |
6161 | socklen_t n = sizeof(struct ucred); | |
6162 | struct ucred u; | |
6163 | int r; | |
6164 | ||
6165 | assert(fd >= 0); | |
6166 | assert(ucred); | |
6167 | ||
6168 | r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &u, &n); | |
6169 | if (r < 0) | |
6170 | return -errno; | |
6171 | ||
6172 | if (n != sizeof(struct ucred)) | |
6173 | return -EIO; | |
6174 | ||
6175 | /* Check if the data is actually useful and not suppressed due | |
6176 | * to namespacing issues */ | |
6177 | if (u.pid <= 0) | |
6178 | return -ENODATA; | |
6179 | ||
6180 | *ucred = u; | |
6181 | return 0; | |
6182 | } | |
6183 | ||
6184 | int getpeersec(int fd, char **ret) { | |
6185 | socklen_t n = 64; | |
6186 | char *s; | |
6187 | int r; | |
6188 | ||
6189 | assert(fd >= 0); | |
6190 | assert(ret); | |
6191 | ||
6192 | s = new0(char, n); | |
6193 | if (!s) | |
6194 | return -ENOMEM; | |
6195 | ||
6196 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6197 | if (r < 0) { | |
6198 | free(s); | |
6199 | ||
6200 | if (errno != ERANGE) | |
6201 | return -errno; | |
6202 | ||
6203 | s = new0(char, n); | |
6204 | if (!s) | |
6205 | return -ENOMEM; | |
6206 | ||
6207 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6208 | if (r < 0) { | |
6209 | free(s); | |
6210 | return -errno; | |
6211 | } | |
6212 | } | |
6213 | ||
ae98841e LP |
6214 | if (isempty(s)) { |
6215 | free(s); | |
6216 | return -ENOTSUP; | |
6217 | } | |
6218 | ||
eff05270 LP |
6219 | *ret = s; |
6220 | return 0; | |
6221 | } | |
8e33886e | 6222 | |
0f010ef2 | 6223 | /* This is much like like mkostemp() but is subject to umask(). */ |
65b3903f | 6224 | int mkostemp_safe(char *pattern, int flags) { |
2d5bdf5b | 6225 | _cleanup_umask_ mode_t u; |
0f010ef2 | 6226 | int fd; |
65b3903f | 6227 | |
d37a91e8 | 6228 | assert(pattern); |
65b3903f | 6229 | |
2d5bdf5b LP |
6230 | u = umask(077); |
6231 | ||
0f010ef2 ZJS |
6232 | fd = mkostemp(pattern, flags); |
6233 | if (fd < 0) | |
6234 | return -errno; | |
65b3903f | 6235 | |
0f010ef2 | 6236 | return fd; |
65b3903f ZJS |
6237 | } |
6238 | ||
8e33886e | 6239 | int open_tmpfile(const char *path, int flags) { |
8e33886e | 6240 | char *p; |
a6afc4ae LP |
6241 | int fd; |
6242 | ||
6243 | assert(path); | |
8e33886e ZJS |
6244 | |
6245 | #ifdef O_TMPFILE | |
7736202c LP |
6246 | /* Try O_TMPFILE first, if it is supported */ |
6247 | fd = open(path, flags|O_TMPFILE, S_IRUSR|S_IWUSR); | |
8e33886e ZJS |
6248 | if (fd >= 0) |
6249 | return fd; | |
6250 | #endif | |
7736202c LP |
6251 | |
6252 | /* Fall back to unguessable name + unlinking */ | |
8e33886e ZJS |
6253 | p = strappenda(path, "/systemd-tmp-XXXXXX"); |
6254 | ||
a6afc4ae | 6255 | fd = mkostemp_safe(p, flags); |
8e33886e | 6256 | if (fd < 0) |
65b3903f | 6257 | return fd; |
8e33886e ZJS |
6258 | |
6259 | unlink(p); | |
6260 | return fd; | |
6261 | } | |
fdb9161c LP |
6262 | |
6263 | int fd_warn_permissions(const char *path, int fd) { | |
6264 | struct stat st; | |
6265 | ||
6266 | if (fstat(fd, &st) < 0) | |
6267 | return -errno; | |
6268 | ||
6269 | if (st.st_mode & 0111) | |
6270 | log_warning("Configuration file %s is marked executable. Please remove executable permission bits. Proceeding anyway.", path); | |
6271 | ||
6272 | if (st.st_mode & 0002) | |
6273 | log_warning("Configuration file %s is marked world-writable. Please remove world writability permission bits. Proceeding anyway.", path); | |
6274 | ||
6275 | if (getpid() == 1 && (st.st_mode & 0044) != 0044) | |
6276 | 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); | |
6277 | ||
6278 | return 0; | |
6279 | } | |
6afc95b7 | 6280 | |
ac45f971 | 6281 | unsigned long personality_from_string(const char *p) { |
6afc95b7 LP |
6282 | |
6283 | /* Parse a personality specifier. We introduce our own | |
6284 | * identifiers that indicate specific ABIs, rather than just | |
6285 | * hints regarding the register size, since we want to keep | |
6286 | * things open for multiple locally supported ABIs for the | |
6287 | * same register size. We try to reuse the ABI identifiers | |
6288 | * used by libseccomp. */ | |
6289 | ||
6290 | #if defined(__x86_64__) | |
6291 | ||
6292 | if (streq(p, "x86")) | |
6293 | return PER_LINUX32; | |
6294 | ||
6295 | if (streq(p, "x86-64")) | |
6296 | return PER_LINUX; | |
6297 | ||
6298 | #elif defined(__i386__) | |
6299 | ||
6300 | if (streq(p, "x86")) | |
6301 | return PER_LINUX; | |
6302 | #endif | |
6303 | ||
6304 | /* personality(7) documents that 0xffffffffUL is used for | |
6305 | * querying the current personality, hence let's use that here | |
6306 | * as error indicator. */ | |
6307 | return 0xffffffffUL; | |
6308 | } | |
ac45f971 LP |
6309 | |
6310 | const char* personality_to_string(unsigned long p) { | |
6311 | ||
6312 | #if defined(__x86_64__) | |
6313 | ||
6314 | if (p == PER_LINUX32) | |
6315 | return "x86"; | |
6316 | ||
6317 | if (p == PER_LINUX) | |
6318 | return "x86-64"; | |
6319 | ||
6320 | #elif defined(__i386__) | |
6321 | ||
6322 | if (p == PER_LINUX) | |
6323 | return "x86"; | |
6324 | #endif | |
6325 | ||
6326 | return NULL; | |
6327 | } | |
1c231f56 LP |
6328 | |
6329 | uint64_t physical_memory(void) { | |
6330 | long mem; | |
6331 | ||
6332 | /* We return this as uint64_t in case we are running as 32bit | |
6333 | * process on a 64bit kernel with huge amounts of memory */ | |
6334 | ||
6335 | mem = sysconf(_SC_PHYS_PAGES); | |
6336 | assert(mem > 0); | |
6337 | ||
6338 | return (uint64_t) mem * (uint64_t) page_size(); | |
6339 | } | |
6db615c1 LP |
6340 | |
6341 | char* mount_test_option(const char *haystack, const char *needle) { | |
6342 | ||
6343 | struct mntent me = { | |
6344 | .mnt_opts = (char*) haystack | |
6345 | }; | |
6346 | ||
6347 | assert(needle); | |
6348 | ||
6349 | /* Like glibc's hasmntopt(), but works on a string, not a | |
6350 | * struct mntent */ | |
6351 | ||
6352 | if (!haystack) | |
6353 | return NULL; | |
6354 | ||
6355 | return hasmntopt(&me, needle); | |
6356 | } | |
29bfbcd6 LP |
6357 | |
6358 | void hexdump(FILE *f, const void *p, size_t s) { | |
6359 | const uint8_t *b = p; | |
6360 | unsigned n = 0; | |
6361 | ||
6362 | assert(s == 0 || b); | |
6363 | ||
6364 | while (s > 0) { | |
6365 | size_t i; | |
6366 | ||
6367 | fprintf(f, "%04x ", n); | |
6368 | ||
6369 | for (i = 0; i < 16; i++) { | |
6370 | ||
6371 | if (i >= s) | |
6372 | fputs(" ", f); | |
6373 | else | |
6374 | fprintf(f, "%02x ", b[i]); | |
6375 | ||
6376 | if (i == 7) | |
6377 | fputc(' ', f); | |
6378 | } | |
6379 | ||
6380 | fputc(' ', f); | |
6381 | ||
6382 | for (i = 0; i < 16; i++) { | |
6383 | ||
6384 | if (i >= s) | |
6385 | fputc(' ', f); | |
6386 | else | |
6387 | fputc(isprint(b[i]) ? (char) b[i] : '.', f); | |
6388 | } | |
6389 | ||
6390 | fputc('\n', f); | |
6391 | ||
6392 | if (s < 16) | |
6393 | break; | |
6394 | ||
6395 | n += 16; | |
6396 | b += 16; | |
6397 | s -= 16; | |
6398 | } | |
6399 | } |