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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
60918275 LP |
22 | #include <assert.h> |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
85261803 | 26 | #include <stdlib.h> |
034c6ed7 LP |
27 | #include <signal.h> |
28 | #include <stdio.h> | |
1dccbe19 LP |
29 | #include <syslog.h> |
30 | #include <sched.h> | |
31 | #include <sys/resource.h> | |
ef886c6a | 32 | #include <linux/sched.h> |
a9f5d454 LP |
33 | #include <sys/types.h> |
34 | #include <sys/stat.h> | |
3a0ecb08 | 35 | #include <fcntl.h> |
a0d40ac5 | 36 | #include <dirent.h> |
601f6a1e LP |
37 | #include <sys/ioctl.h> |
38 | #include <linux/vt.h> | |
39 | #include <linux/tiocl.h> | |
80876c20 LP |
40 | #include <termios.h> |
41 | #include <stdarg.h> | |
42 | #include <sys/inotify.h> | |
43 | #include <sys/poll.h> | |
3177a7fa | 44 | #include <ctype.h> |
5b6319dc | 45 | #include <sys/prctl.h> |
ef2f1067 LP |
46 | #include <sys/utsname.h> |
47 | #include <pwd.h> | |
4fd5948e | 48 | #include <netinet/ip.h> |
3fe5e5d4 | 49 | #include <linux/kd.h> |
afea26ad | 50 | #include <dlfcn.h> |
2e78aa99 | 51 | #include <sys/wait.h> |
7948c4df | 52 | #include <sys/time.h> |
8092a428 | 53 | #include <glob.h> |
4b67834e | 54 | #include <grp.h> |
87d2c1ff | 55 | #include <sys/mman.h> |
825c6fe5 | 56 | #include <sys/vfs.h> |
6d313367 | 57 | #include <sys/mount.h> |
825c6fe5 | 58 | #include <linux/magic.h> |
0b507b17 | 59 | #include <limits.h> |
09017585 MS |
60 | #include <langinfo.h> |
61 | #include <locale.h> | |
6afc95b7 | 62 | #include <sys/personality.h> |
844ec79b | 63 | #include <libgen.h> |
2b6bf07d | 64 | #undef basename |
60918275 | 65 | |
9bf3b535 LP |
66 | #ifdef HAVE_SYS_AUXV_H |
67 | #include <sys/auxv.h> | |
68 | #endif | |
69 | ||
60918275 LP |
70 | #include "macro.h" |
71 | #include "util.h" | |
1dccbe19 LP |
72 | #include "ioprio.h" |
73 | #include "missing.h" | |
a9f5d454 | 74 | #include "log.h" |
65d2ebdc | 75 | #include "strv.h" |
e51bc1a2 | 76 | #include "label.h" |
c38dfac9 | 77 | #include "mkdir.h" |
9eb977db | 78 | #include "path-util.h" |
d06dacd0 | 79 | #include "exit-status.h" |
83cc030f | 80 | #include "hashmap.h" |
4d1a6904 | 81 | #include "env-util.h" |
a5c32cff | 82 | #include "fileio.h" |
8f6ce71f | 83 | #include "device-nodes.h" |
f405e86d SL |
84 | #include "utf8.h" |
85 | #include "gunicode.h" | |
295edddf | 86 | #include "virt.h" |
477def80 | 87 | #include "def.h" |
56cf987f | 88 | |
9a0e6896 LP |
89 | int saved_argc = 0; |
90 | char **saved_argv = NULL; | |
9086e840 | 91 | |
28917d7d | 92 | static volatile unsigned cached_columns = 0; |
ed757c0c | 93 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 94 | |
37f85e66 | 95 | size_t page_size(void) { |
ec202eae | 96 | static thread_local size_t pgsz = 0; |
37f85e66 | 97 | long r; |
98 | ||
87d2c1ff | 99 | if (_likely_(pgsz > 0)) |
37f85e66 | 100 | return pgsz; |
101 | ||
e67f47e5 LP |
102 | r = sysconf(_SC_PAGESIZE); |
103 | assert(r > 0); | |
37f85e66 | 104 | |
105 | pgsz = (size_t) r; | |
37f85e66 | 106 | return pgsz; |
107 | } | |
108 | ||
e05797fb LP |
109 | bool streq_ptr(const char *a, const char *b) { |
110 | ||
111 | /* Like streq(), but tries to make sense of NULL pointers */ | |
112 | ||
113 | if (a && b) | |
114 | return streq(a, b); | |
115 | ||
116 | if (!a && !b) | |
117 | return true; | |
118 | ||
119 | return false; | |
120 | } | |
121 | ||
8c7c140f | 122 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
123 | size_t sl, pl; |
124 | ||
125 | assert(s); | |
126 | assert(postfix); | |
127 | ||
128 | sl = strlen(s); | |
129 | pl = strlen(postfix); | |
130 | ||
d4d0d4db | 131 | if (pl == 0) |
8c7c140f | 132 | return (char*) s + sl; |
d4d0d4db | 133 | |
60918275 | 134 | if (sl < pl) |
8c7c140f LP |
135 | return NULL; |
136 | ||
137 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
138 | return NULL; | |
60918275 | 139 | |
8c7c140f | 140 | return (char*) s + sl - pl; |
60918275 LP |
141 | } |
142 | ||
79d6d816 LP |
143 | bool first_word(const char *s, const char *word) { |
144 | size_t sl, wl; | |
145 | ||
146 | assert(s); | |
147 | assert(word); | |
148 | ||
149 | sl = strlen(s); | |
150 | wl = strlen(word); | |
151 | ||
152 | if (sl < wl) | |
153 | return false; | |
154 | ||
d4d0d4db LP |
155 | if (wl == 0) |
156 | return true; | |
157 | ||
79d6d816 LP |
158 | if (memcmp(s, word, wl) != 0) |
159 | return false; | |
160 | ||
d4d0d4db LP |
161 | return s[wl] == 0 || |
162 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
163 | } |
164 | ||
42f4e3c4 | 165 | int close_nointr(int fd) { |
b0ee8068 | 166 | int r; |
60918275 | 167 | |
b0ee8068 CW |
168 | assert(fd >= 0); |
169 | r = close(fd); | |
d96ea504 | 170 | if (r >= 0) |
b0ee8068 | 171 | return r; |
d96ea504 LP |
172 | else if (errno == EINTR) |
173 | /* | |
174 | * Just ignore EINTR; a retry loop is the wrong | |
175 | * thing to do on Linux. | |
176 | * | |
177 | * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html | |
178 | * https://bugzilla.gnome.org/show_bug.cgi?id=682819 | |
179 | * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR | |
180 | * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain | |
181 | */ | |
182 | return 0; | |
b0ee8068 CW |
183 | else |
184 | return -errno; | |
60918275 | 185 | } |
85261803 | 186 | |
03e334a1 LP |
187 | int safe_close(int fd) { |
188 | ||
189 | /* | |
190 | * Like close_nointr() but cannot fail. Guarantees errno is | |
191 | * unchanged. Is a NOP with negative fds passed, and returns | |
192 | * -1, so that it can be used in this syntax: | |
193 | * | |
194 | * fd = safe_close(fd); | |
195 | */ | |
85f136b5 | 196 | |
03e334a1 LP |
197 | if (fd >= 0) { |
198 | PROTECT_ERRNO; | |
d96ea504 LP |
199 | |
200 | /* The kernel might return pretty much any error code | |
201 | * via close(), but the fd will be closed anyway. The | |
202 | * only condition we want to check for here is whether | |
203 | * the fd was invalid at all... */ | |
204 | ||
205 | assert_se(close_nointr(fd) != -EBADF); | |
03e334a1 | 206 | } |
85f136b5 | 207 | |
03e334a1 | 208 | return -1; |
85f136b5 LP |
209 | } |
210 | ||
5b6319dc LP |
211 | void close_many(const int fds[], unsigned n_fd) { |
212 | unsigned i; | |
213 | ||
2c93b4ef LP |
214 | assert(fds || n_fd <= 0); |
215 | ||
5b6319dc | 216 | for (i = 0; i < n_fd; i++) |
03e334a1 | 217 | safe_close(fds[i]); |
5b6319dc LP |
218 | } |
219 | ||
4b73a0c0 LP |
220 | int unlink_noerrno(const char *path) { |
221 | PROTECT_ERRNO; | |
222 | int r; | |
223 | ||
224 | r = unlink(path); | |
225 | if (r < 0) | |
226 | return -errno; | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
85261803 LP |
231 | int parse_boolean(const char *v) { |
232 | assert(v); | |
233 | ||
0f625d0b | 234 | if (streq(v, "1") || strcaseeq(v, "yes") || strcaseeq(v, "y") || strcaseeq(v, "true") || strcaseeq(v, "t") || strcaseeq(v, "on")) |
85261803 | 235 | return 1; |
0f625d0b | 236 | else if (streq(v, "0") || strcaseeq(v, "no") || strcaseeq(v, "n") || strcaseeq(v, "false") || strcaseeq(v, "f") || strcaseeq(v, "off")) |
85261803 LP |
237 | return 0; |
238 | ||
239 | return -EINVAL; | |
240 | } | |
241 | ||
3ba686c1 | 242 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 243 | unsigned long ul = 0; |
3ba686c1 LP |
244 | pid_t pid; |
245 | int r; | |
246 | ||
247 | assert(s); | |
248 | assert(ret_pid); | |
249 | ||
e67f47e5 LP |
250 | r = safe_atolu(s, &ul); |
251 | if (r < 0) | |
3ba686c1 LP |
252 | return r; |
253 | ||
254 | pid = (pid_t) ul; | |
255 | ||
256 | if ((unsigned long) pid != ul) | |
257 | return -ERANGE; | |
258 | ||
259 | if (pid <= 0) | |
260 | return -ERANGE; | |
261 | ||
262 | *ret_pid = pid; | |
263 | return 0; | |
264 | } | |
265 | ||
034a2a52 LP |
266 | int parse_uid(const char *s, uid_t* ret_uid) { |
267 | unsigned long ul = 0; | |
268 | uid_t uid; | |
269 | int r; | |
270 | ||
271 | assert(s); | |
272 | assert(ret_uid); | |
273 | ||
e67f47e5 LP |
274 | r = safe_atolu(s, &ul); |
275 | if (r < 0) | |
034a2a52 LP |
276 | return r; |
277 | ||
278 | uid = (uid_t) ul; | |
279 | ||
280 | if ((unsigned long) uid != ul) | |
281 | return -ERANGE; | |
282 | ||
306a55c8 LP |
283 | /* Some libc APIs use (uid_t) -1 as special placeholder */ |
284 | if (uid == (uid_t) 0xFFFFFFFF) | |
f841a154 | 285 | return -ENXIO; |
306a55c8 | 286 | |
6afeb1cf | 287 | /* A long time ago UIDs where 16bit, hence explicitly avoid the 16bit -1 too */ |
306a55c8 | 288 | if (uid == (uid_t) 0xFFFF) |
f841a154 | 289 | return -ENXIO; |
306a55c8 | 290 | |
034a2a52 LP |
291 | *ret_uid = uid; |
292 | return 0; | |
293 | } | |
294 | ||
85261803 LP |
295 | int safe_atou(const char *s, unsigned *ret_u) { |
296 | char *x = NULL; | |
034c6ed7 | 297 | unsigned long l; |
85261803 LP |
298 | |
299 | assert(s); | |
300 | assert(ret_u); | |
301 | ||
302 | errno = 0; | |
303 | l = strtoul(s, &x, 0); | |
304 | ||
f3910003 | 305 | if (!x || x == s || *x || errno) |
48deb058 | 306 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 307 | |
034c6ed7 | 308 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
309 | return -ERANGE; |
310 | ||
311 | *ret_u = (unsigned) l; | |
312 | return 0; | |
313 | } | |
314 | ||
315 | int safe_atoi(const char *s, int *ret_i) { | |
316 | char *x = NULL; | |
034c6ed7 | 317 | long l; |
85261803 LP |
318 | |
319 | assert(s); | |
320 | assert(ret_i); | |
321 | ||
322 | errno = 0; | |
323 | l = strtol(s, &x, 0); | |
324 | ||
f3910003 | 325 | if (!x || x == s || *x || errno) |
48deb058 | 326 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 327 | |
034c6ed7 | 328 | if ((long) (int) l != l) |
85261803 LP |
329 | return -ERANGE; |
330 | ||
034c6ed7 LP |
331 | *ret_i = (int) l; |
332 | return 0; | |
333 | } | |
334 | ||
b914e211 LP |
335 | int safe_atou8(const char *s, uint8_t *ret) { |
336 | char *x = NULL; | |
337 | unsigned long l; | |
338 | ||
339 | assert(s); | |
340 | assert(ret); | |
341 | ||
342 | errno = 0; | |
343 | l = strtoul(s, &x, 0); | |
344 | ||
345 | if (!x || x == s || *x || errno) | |
346 | return errno > 0 ? -errno : -EINVAL; | |
347 | ||
348 | if ((unsigned long) (uint8_t) l != l) | |
349 | return -ERANGE; | |
350 | ||
351 | *ret = (uint8_t) l; | |
352 | return 0; | |
353 | } | |
354 | ||
034c6ed7 LP |
355 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
356 | char *x = NULL; | |
357 | unsigned long long l; | |
358 | ||
359 | assert(s); | |
360 | assert(ret_llu); | |
361 | ||
362 | errno = 0; | |
363 | l = strtoull(s, &x, 0); | |
364 | ||
f3910003 | 365 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
366 | return errno ? -errno : -EINVAL; |
367 | ||
368 | *ret_llu = l; | |
369 | return 0; | |
370 | } | |
371 | ||
372 | int safe_atolli(const char *s, long long int *ret_lli) { | |
373 | char *x = NULL; | |
374 | long long l; | |
375 | ||
376 | assert(s); | |
377 | assert(ret_lli); | |
378 | ||
379 | errno = 0; | |
380 | l = strtoll(s, &x, 0); | |
381 | ||
f3910003 | 382 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
383 | return errno ? -errno : -EINVAL; |
384 | ||
385 | *ret_lli = l; | |
85261803 LP |
386 | return 0; |
387 | } | |
a41e8209 | 388 | |
f7900e25 TA |
389 | int safe_atod(const char *s, double *ret_d) { |
390 | char *x = NULL; | |
32b2634e | 391 | double d = 0; |
f7900e25 TA |
392 | |
393 | assert(s); | |
394 | assert(ret_d); | |
395 | ||
d6dd604b LP |
396 | RUN_WITH_LOCALE(LC_NUMERIC_MASK, "C") { |
397 | errno = 0; | |
398 | d = strtod(s, &x); | |
399 | } | |
f7900e25 TA |
400 | |
401 | if (!x || x == s || *x || errno) | |
402 | return errno ? -errno : -EINVAL; | |
403 | ||
404 | *ret_d = (double) d; | |
405 | return 0; | |
406 | } | |
407 | ||
bf85c24d SP |
408 | static size_t strcspn_escaped(const char *s, const char *reject) { |
409 | bool escaped = false; | |
410 | size_t n; | |
411 | ||
412 | for (n=0; s[n]; n++) { | |
413 | if (escaped) | |
414 | escaped = false; | |
415 | else if (s[n] == '\\') | |
416 | escaped = true; | |
417 | else if (strchr(reject, s[n])) | |
418 | return n; | |
419 | } | |
420 | return n; | |
421 | } | |
422 | ||
a41e8209 | 423 | /* Split a string into words. */ |
bf85c24d | 424 | char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state) { |
a41e8209 LP |
425 | char *current; |
426 | ||
427 | current = *state ? *state : (char*) c; | |
428 | ||
429 | if (!*current || *c == 0) | |
430 | return NULL; | |
431 | ||
65d2ebdc | 432 | current += strspn(current, separator); |
bf85c24d | 433 | if (!*current) |
70f75a52 LP |
434 | return NULL; |
435 | ||
bf85c24d SP |
436 | if (quoted && strchr("\'\"", *current)) { |
437 | char quotechar = *(current++); | |
438 | *l = strcspn_escaped(current, (char[]){quotechar, '\0'}); | |
439 | *state = current+*l+1; | |
440 | } else if (quoted) { | |
441 | *l = strcspn_escaped(current, separator); | |
442 | *state = current+*l; | |
034c6ed7 | 443 | } else { |
bf85c24d SP |
444 | *l = strcspn(current, separator); |
445 | *state = current+*l; | |
034c6ed7 LP |
446 | } |
447 | ||
5b12334d | 448 | return (char*) current; |
034c6ed7 LP |
449 | } |
450 | ||
034c6ed7 LP |
451 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
452 | int r; | |
b4696bce | 453 | _cleanup_free_ char *line = NULL; |
bb00e604 | 454 | long unsigned ppid; |
49aa47c7 | 455 | const char *p; |
034c6ed7 | 456 | |
49aa47c7 | 457 | assert(pid >= 0); |
034c6ed7 LP |
458 | assert(_ppid); |
459 | ||
49aa47c7 LP |
460 | if (pid == 0) { |
461 | *_ppid = getppid(); | |
462 | return 0; | |
463 | } | |
034c6ed7 | 464 | |
49aa47c7 | 465 | p = procfs_file_alloca(pid, "stat"); |
b4696bce SP |
466 | r = read_one_line_file(p, &line); |
467 | if (r < 0) | |
034c6ed7 | 468 | return r; |
034c6ed7 | 469 | |
034c6ed7 LP |
470 | /* Let's skip the pid and comm fields. The latter is enclosed |
471 | * in () but does not escape any () in its value, so let's | |
472 | * skip over it manually */ | |
473 | ||
2fbe635a LP |
474 | p = strrchr(line, ')'); |
475 | if (!p) | |
034c6ed7 LP |
476 | return -EIO; |
477 | ||
478 | p++; | |
479 | ||
480 | if (sscanf(p, " " | |
481 | "%*c " /* state */ | |
bb00e604 | 482 | "%lu ", /* ppid */ |
034c6ed7 LP |
483 | &ppid) != 1) |
484 | return -EIO; | |
485 | ||
bb00e604 | 486 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
487 | return -ERANGE; |
488 | ||
489 | *_ppid = (pid_t) ppid; | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
7640a5de | 494 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
b4696bce SP |
495 | int r; |
496 | _cleanup_free_ char *line = NULL; | |
49aa47c7 | 497 | const char *p; |
7640a5de | 498 | |
49aa47c7 | 499 | assert(pid >= 0); |
7640a5de LP |
500 | assert(st); |
501 | ||
b68fa010 | 502 | p = procfs_file_alloca(pid, "stat"); |
b4696bce SP |
503 | r = read_one_line_file(p, &line); |
504 | if (r < 0) | |
505 | return r; | |
7640a5de LP |
506 | |
507 | /* Let's skip the pid and comm fields. The latter is enclosed | |
508 | * in () but does not escape any () in its value, so let's | |
509 | * skip over it manually */ | |
510 | ||
e67f47e5 LP |
511 | p = strrchr(line, ')'); |
512 | if (!p) | |
7640a5de LP |
513 | return -EIO; |
514 | ||
515 | p++; | |
516 | ||
517 | if (sscanf(p, " " | |
518 | "%*c " /* state */ | |
519 | "%*d " /* ppid */ | |
520 | "%*d " /* pgrp */ | |
521 | "%*d " /* session */ | |
522 | "%*d " /* tty_nr */ | |
523 | "%*d " /* tpgid */ | |
524 | "%*u " /* flags */ | |
525 | "%*u " /* minflt */ | |
526 | "%*u " /* cminflt */ | |
527 | "%*u " /* majflt */ | |
528 | "%*u " /* cmajflt */ | |
529 | "%*u " /* utime */ | |
530 | "%*u " /* stime */ | |
531 | "%*d " /* cutime */ | |
532 | "%*d " /* cstime */ | |
533 | "%*d " /* priority */ | |
534 | "%*d " /* nice */ | |
535 | "%*d " /* num_threads */ | |
536 | "%*d " /* itrealvalue */ | |
537 | "%llu " /* starttime */, | |
538 | st) != 1) | |
539 | return -EIO; | |
540 | ||
541 | return 0; | |
542 | } | |
543 | ||
34ca941c LP |
544 | int fchmod_umask(int fd, mode_t m) { |
545 | mode_t u; | |
546 | int r; | |
547 | ||
548 | u = umask(0777); | |
549 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
550 | umask(u); | |
551 | ||
552 | return r; | |
553 | } | |
554 | ||
7072ced8 LP |
555 | char *truncate_nl(char *s) { |
556 | assert(s); | |
557 | ||
558 | s[strcspn(s, NEWLINE)] = 0; | |
559 | return s; | |
560 | } | |
561 | ||
93b5eaec | 562 | int get_process_state(pid_t pid) { |
e10c9985 YS |
563 | const char *p; |
564 | char state; | |
565 | int r; | |
566 | _cleanup_free_ char *line = NULL; | |
567 | ||
568 | assert(pid >= 0); | |
569 | ||
570 | p = procfs_file_alloca(pid, "stat"); | |
571 | r = read_one_line_file(p, &line); | |
572 | if (r < 0) | |
573 | return r; | |
574 | ||
575 | p = strrchr(line, ')'); | |
576 | if (!p) | |
577 | return -EIO; | |
578 | ||
579 | p++; | |
580 | ||
581 | if (sscanf(p, " %c", &state) != 1) | |
582 | return -EIO; | |
583 | ||
584 | return (unsigned char) state; | |
585 | } | |
586 | ||
87d2c1ff | 587 | int get_process_comm(pid_t pid, char **name) { |
49aa47c7 | 588 | const char *p; |
5b12334d | 589 | int r; |
7072ced8 | 590 | |
7072ced8 | 591 | assert(name); |
49aa47c7 | 592 | assert(pid >= 0); |
7072ced8 | 593 | |
b68fa010 | 594 | p = procfs_file_alloca(pid, "comm"); |
7072ced8 | 595 | |
5b12334d LP |
596 | r = read_one_line_file(p, name); |
597 | if (r == -ENOENT) | |
598 | return -ESRCH; | |
599 | ||
600 | return r; | |
7072ced8 LP |
601 | } |
602 | ||
87d2c1ff | 603 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
49aa47c7 | 604 | _cleanup_fclose_ FILE *f = NULL; |
9bdbc2e2 | 605 | char *r = NULL, *k; |
49aa47c7 | 606 | const char *p; |
c59760ee | 607 | int c; |
c59760ee | 608 | |
c59760ee | 609 | assert(line); |
49aa47c7 | 610 | assert(pid >= 0); |
c59760ee | 611 | |
b68fa010 | 612 | p = procfs_file_alloca(pid, "cmdline"); |
c59760ee | 613 | |
49aa47c7 | 614 | f = fopen(p, "re"); |
c59760ee LP |
615 | if (!f) |
616 | return -errno; | |
49aa47c7 | 617 | |
9bdbc2e2 | 618 | if (max_length == 0) { |
49aa47c7 LP |
619 | size_t len = 0, allocated = 0; |
620 | ||
9bdbc2e2 | 621 | while ((c = getc(f)) != EOF) { |
49aa47c7 LP |
622 | |
623 | if (!GREEDY_REALLOC(r, allocated, len+2)) { | |
9bdbc2e2 | 624 | free(r); |
9bdbc2e2 LN |
625 | return -ENOMEM; |
626 | } | |
49aa47c7 LP |
627 | |
628 | r[len++] = isprint(c) ? c : ' '; | |
9bdbc2e2 | 629 | } |
49aa47c7 LP |
630 | |
631 | if (len > 0) | |
632 | r[len-1] = 0; | |
633 | ||
9bdbc2e2 LN |
634 | } else { |
635 | bool space = false; | |
636 | size_t left; | |
49aa47c7 | 637 | |
9bdbc2e2 | 638 | r = new(char, max_length); |
49aa47c7 | 639 | if (!r) |
9bdbc2e2 | 640 | return -ENOMEM; |
c59760ee | 641 | |
9bdbc2e2 LN |
642 | k = r; |
643 | left = max_length; | |
644 | while ((c = getc(f)) != EOF) { | |
c59760ee | 645 | |
9bdbc2e2 LN |
646 | if (isprint(c)) { |
647 | if (space) { | |
648 | if (left <= 4) | |
649 | break; | |
650 | ||
651 | *(k++) = ' '; | |
652 | left--; | |
653 | space = false; | |
654 | } | |
c59760ee | 655 | |
c59760ee LP |
656 | if (left <= 4) |
657 | break; | |
658 | ||
9bdbc2e2 | 659 | *(k++) = (char) c; |
057fbb58 | 660 | left--; |
9bdbc2e2 LN |
661 | } else |
662 | space = true; | |
663 | } | |
c59760ee | 664 | |
9bdbc2e2 LN |
665 | if (left <= 4) { |
666 | size_t n = MIN(left-1, 3U); | |
667 | memcpy(k, "...", n); | |
668 | k[n] = 0; | |
669 | } else | |
670 | *k = 0; | |
c59760ee LP |
671 | } |
672 | ||
35d2e7ec | 673 | /* Kernel threads have no argv[] */ |
9bdbc2e2 | 674 | if (r == NULL || r[0] == 0) { |
b47d419c | 675 | _cleanup_free_ char *t = NULL; |
35d2e7ec LP |
676 | int h; |
677 | ||
678 | free(r); | |
679 | ||
87d2c1ff LP |
680 | if (!comm_fallback) |
681 | return -ENOENT; | |
682 | ||
683 | h = get_process_comm(pid, &t); | |
684 | if (h < 0) | |
35d2e7ec LP |
685 | return h; |
686 | ||
b7def684 | 687 | r = strjoin("[", t, "]", NULL); |
87d2c1ff | 688 | if (!r) |
35d2e7ec LP |
689 | return -ENOMEM; |
690 | } | |
fa776d8e | 691 | |
c59760ee LP |
692 | *line = r; |
693 | return 0; | |
694 | } | |
695 | ||
1e5678d0 | 696 | int is_kernel_thread(pid_t pid) { |
49aa47c7 | 697 | const char *p; |
1e5678d0 LP |
698 | size_t count; |
699 | char c; | |
700 | bool eof; | |
701 | FILE *f; | |
702 | ||
703 | if (pid == 0) | |
704 | return 0; | |
705 | ||
49aa47c7 | 706 | assert(pid > 0); |
1e5678d0 | 707 | |
49aa47c7 LP |
708 | p = procfs_file_alloca(pid, "cmdline"); |
709 | f = fopen(p, "re"); | |
1e5678d0 LP |
710 | if (!f) |
711 | return -errno; | |
712 | ||
713 | count = fread(&c, 1, 1, f); | |
714 | eof = feof(f); | |
715 | fclose(f); | |
716 | ||
717 | /* Kernel threads have an empty cmdline */ | |
718 | ||
719 | if (count <= 0) | |
720 | return eof ? 1 : -errno; | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
3a832116 SL |
725 | int get_process_capeff(pid_t pid, char **capeff) { |
726 | const char *p; | |
3a832116 SL |
727 | |
728 | assert(capeff); | |
729 | assert(pid >= 0); | |
730 | ||
b68fa010 | 731 | p = procfs_file_alloca(pid, "status"); |
3a832116 | 732 | |
69ab8088 | 733 | return get_status_field(p, "\nCapEff:", capeff); |
3a832116 | 734 | } |
49aa47c7 | 735 | |
87d2c1ff | 736 | int get_process_exe(pid_t pid, char **name) { |
49aa47c7 | 737 | const char *p; |
e79f68d1 ZJS |
738 | char *d; |
739 | int r; | |
87d2c1ff | 740 | |
49aa47c7 | 741 | assert(pid >= 0); |
87d2c1ff LP |
742 | assert(name); |
743 | ||
b68fa010 | 744 | p = procfs_file_alloca(pid, "exe"); |
87d2c1ff | 745 | |
e79f68d1 ZJS |
746 | r = readlink_malloc(p, name); |
747 | if (r < 0) | |
5b12334d | 748 | return r == -ENOENT ? -ESRCH : r; |
e79f68d1 ZJS |
749 | |
750 | d = endswith(*name, " (deleted)"); | |
751 | if (d) | |
752 | *d = '\0'; | |
753 | ||
754 | return 0; | |
87d2c1ff LP |
755 | } |
756 | ||
901c3d0d | 757 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
f74e605f | 758 | _cleanup_fclose_ FILE *f = NULL; |
9db11a99 | 759 | char line[LINE_MAX]; |
49aa47c7 | 760 | const char *p; |
7e4ab3c5 | 761 | |
f74e605f | 762 | assert(field); |
7e4ab3c5 LP |
763 | assert(uid); |
764 | ||
765 | if (pid == 0) | |
766 | return getuid(); | |
767 | ||
49aa47c7 LP |
768 | p = procfs_file_alloca(pid, "status"); |
769 | f = fopen(p, "re"); | |
7e4ab3c5 LP |
770 | if (!f) |
771 | return -errno; | |
772 | ||
9db11a99 | 773 | FOREACH_LINE(line, f, return -errno) { |
f74e605f | 774 | char *l; |
7e4ab3c5 LP |
775 | |
776 | l = strstrip(line); | |
777 | ||
901c3d0d LP |
778 | if (startswith(l, field)) { |
779 | l += strlen(field); | |
7e4ab3c5 LP |
780 | l += strspn(l, WHITESPACE); |
781 | ||
782 | l[strcspn(l, WHITESPACE)] = 0; | |
783 | ||
f74e605f | 784 | return parse_uid(l, uid); |
7e4ab3c5 LP |
785 | } |
786 | } | |
787 | ||
f74e605f | 788 | return -EIO; |
7e4ab3c5 LP |
789 | } |
790 | ||
901c3d0d LP |
791 | int get_process_uid(pid_t pid, uid_t *uid) { |
792 | return get_process_id(pid, "Uid:", uid); | |
793 | } | |
794 | ||
795 | int get_process_gid(pid_t pid, gid_t *gid) { | |
49aa47c7 | 796 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); |
901c3d0d LP |
797 | return get_process_id(pid, "Gid:", gid); |
798 | } | |
799 | ||
fab56fc5 LP |
800 | char *strnappend(const char *s, const char *suffix, size_t b) { |
801 | size_t a; | |
44d8db9e LP |
802 | char *r; |
803 | ||
fab56fc5 LP |
804 | if (!s && !suffix) |
805 | return strdup(""); | |
806 | ||
807 | if (!s) | |
808 | return strndup(suffix, b); | |
809 | ||
810 | if (!suffix) | |
811 | return strdup(s); | |
812 | ||
44d8db9e LP |
813 | assert(s); |
814 | assert(suffix); | |
815 | ||
816 | a = strlen(s); | |
aa408e77 | 817 | if (b > ((size_t) -1) - a) |
040f18ea | 818 | return NULL; |
44d8db9e | 819 | |
040f18ea LP |
820 | r = new(char, a+b+1); |
821 | if (!r) | |
44d8db9e LP |
822 | return NULL; |
823 | ||
824 | memcpy(r, s, a); | |
825 | memcpy(r+a, suffix, b); | |
826 | r[a+b] = 0; | |
827 | ||
828 | return r; | |
829 | } | |
87f0e418 | 830 | |
fab56fc5 LP |
831 | char *strappend(const char *s, const char *suffix) { |
832 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
833 | } | |
834 | ||
849958d1 | 835 | int readlinkat_malloc(int fd, const char *p, char **ret) { |
87f0e418 | 836 | size_t l = 100; |
2d2ebd6b | 837 | int r; |
87f0e418 LP |
838 | |
839 | assert(p); | |
2d2ebd6b | 840 | assert(ret); |
87f0e418 LP |
841 | |
842 | for (;;) { | |
843 | char *c; | |
844 | ssize_t n; | |
845 | ||
2d2ebd6b LP |
846 | c = new(char, l); |
847 | if (!c) | |
87f0e418 LP |
848 | return -ENOMEM; |
849 | ||
849958d1 | 850 | n = readlinkat(fd, p, c, l-1); |
2d2ebd6b LP |
851 | if (n < 0) { |
852 | r = -errno; | |
87f0e418 | 853 | free(c); |
2d2ebd6b | 854 | return r; |
87f0e418 LP |
855 | } |
856 | ||
857 | if ((size_t) n < l-1) { | |
858 | c[n] = 0; | |
2d2ebd6b | 859 | *ret = c; |
87f0e418 LP |
860 | return 0; |
861 | } | |
862 | ||
863 | free(c); | |
864 | l *= 2; | |
865 | } | |
866 | } | |
867 | ||
849958d1 LP |
868 | int readlink_malloc(const char *p, char **ret) { |
869 | return readlinkat_malloc(AT_FDCWD, p, ret); | |
870 | } | |
871 | ||
2c7108c4 | 872 | int readlink_and_make_absolute(const char *p, char **r) { |
1058cbf2 ZJS |
873 | _cleanup_free_ char *target = NULL; |
874 | char *k; | |
2c7108c4 LP |
875 | int j; |
876 | ||
877 | assert(p); | |
878 | assert(r); | |
879 | ||
1058cbf2 ZJS |
880 | j = readlink_malloc(p, &target); |
881 | if (j < 0) | |
2c7108c4 LP |
882 | return j; |
883 | ||
884 | k = file_in_same_dir(p, target); | |
2c7108c4 LP |
885 | if (!k) |
886 | return -ENOMEM; | |
887 | ||
888 | *r = k; | |
889 | return 0; | |
890 | } | |
891 | ||
83096483 LP |
892 | int readlink_and_canonicalize(const char *p, char **r) { |
893 | char *t, *s; | |
894 | int j; | |
895 | ||
896 | assert(p); | |
897 | assert(r); | |
898 | ||
899 | j = readlink_and_make_absolute(p, &t); | |
900 | if (j < 0) | |
901 | return j; | |
902 | ||
903 | s = canonicalize_file_name(t); | |
904 | if (s) { | |
905 | free(t); | |
906 | *r = s; | |
907 | } else | |
908 | *r = t; | |
909 | ||
910 | path_kill_slashes(*r); | |
911 | ||
912 | return 0; | |
913 | } | |
914 | ||
2a987ee8 LP |
915 | int reset_all_signal_handlers(void) { |
916 | int sig; | |
917 | ||
918 | for (sig = 1; sig < _NSIG; sig++) { | |
b92bea5d ZJS |
919 | struct sigaction sa = { |
920 | .sa_handler = SIG_DFL, | |
921 | .sa_flags = SA_RESTART, | |
922 | }; | |
2a987ee8 LP |
923 | |
924 | if (sig == SIGKILL || sig == SIGSTOP) | |
925 | continue; | |
926 | ||
2a987ee8 LP |
927 | /* On Linux the first two RT signals are reserved by |
928 | * glibc, and sigaction() will return EINVAL for them. */ | |
929 | if ((sigaction(sig, &sa, NULL) < 0)) | |
930 | if (errno != EINVAL) | |
931 | return -errno; | |
932 | } | |
933 | ||
8e274523 | 934 | return 0; |
2a987ee8 | 935 | } |
4a72ff34 LP |
936 | |
937 | char *strstrip(char *s) { | |
57a8eca8 | 938 | char *e; |
4a72ff34 LP |
939 | |
940 | /* Drops trailing whitespace. Modifies the string in | |
941 | * place. Returns pointer to first non-space character */ | |
942 | ||
943 | s += strspn(s, WHITESPACE); | |
944 | ||
57a8eca8 LP |
945 | for (e = strchr(s, 0); e > s; e --) |
946 | if (!strchr(WHITESPACE, e[-1])) | |
947 | break; | |
4a72ff34 | 948 | |
57a8eca8 | 949 | *e = 0; |
4a72ff34 LP |
950 | |
951 | return s; | |
4a72ff34 LP |
952 | } |
953 | ||
ee9b5e01 LP |
954 | char *delete_chars(char *s, const char *bad) { |
955 | char *f, *t; | |
956 | ||
957 | /* Drops all whitespace, regardless where in the string */ | |
958 | ||
959 | for (f = s, t = s; *f; f++) { | |
960 | if (strchr(bad, *f)) | |
961 | continue; | |
962 | ||
963 | *(t++) = *f; | |
964 | } | |
965 | ||
966 | *t = 0; | |
967 | ||
968 | return s; | |
969 | } | |
970 | ||
4a72ff34 LP |
971 | char *file_in_same_dir(const char *path, const char *filename) { |
972 | char *e, *r; | |
973 | size_t k; | |
974 | ||
975 | assert(path); | |
976 | assert(filename); | |
977 | ||
978 | /* This removes the last component of path and appends | |
979 | * filename, unless the latter is absolute anyway or the | |
980 | * former isn't */ | |
981 | ||
982 | if (path_is_absolute(filename)) | |
983 | return strdup(filename); | |
984 | ||
985 | if (!(e = strrchr(path, '/'))) | |
986 | return strdup(filename); | |
987 | ||
988 | k = strlen(filename); | |
989 | if (!(r = new(char, e-path+1+k+1))) | |
990 | return NULL; | |
991 | ||
992 | memcpy(r, path, e-path+1); | |
993 | memcpy(r+(e-path)+1, filename, k+1); | |
994 | ||
995 | return r; | |
996 | } | |
fb624d04 | 997 | |
c32dd69b LP |
998 | int rmdir_parents(const char *path, const char *stop) { |
999 | size_t l; | |
1000 | int r = 0; | |
1001 | ||
1002 | assert(path); | |
1003 | assert(stop); | |
1004 | ||
1005 | l = strlen(path); | |
1006 | ||
1007 | /* Skip trailing slashes */ | |
1008 | while (l > 0 && path[l-1] == '/') | |
1009 | l--; | |
1010 | ||
1011 | while (l > 0) { | |
1012 | char *t; | |
1013 | ||
1014 | /* Skip last component */ | |
1015 | while (l > 0 && path[l-1] != '/') | |
1016 | l--; | |
1017 | ||
1018 | /* Skip trailing slashes */ | |
1019 | while (l > 0 && path[l-1] == '/') | |
1020 | l--; | |
1021 | ||
1022 | if (l <= 0) | |
1023 | break; | |
1024 | ||
1025 | if (!(t = strndup(path, l))) | |
1026 | return -ENOMEM; | |
1027 | ||
1028 | if (path_startswith(stop, t)) { | |
1029 | free(t); | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | r = rmdir(t); | |
1034 | free(t); | |
1035 | ||
1036 | if (r < 0) | |
1037 | if (errno != ENOENT) | |
1038 | return -errno; | |
1039 | } | |
1040 | ||
1041 | return 0; | |
1042 | } | |
1043 | ||
fb624d04 LP |
1044 | char hexchar(int x) { |
1045 | static const char table[16] = "0123456789abcdef"; | |
1046 | ||
1047 | return table[x & 15]; | |
1048 | } | |
4fe88d28 LP |
1049 | |
1050 | int unhexchar(char c) { | |
1051 | ||
1052 | if (c >= '0' && c <= '9') | |
1053 | return c - '0'; | |
1054 | ||
1055 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1056 | return c - 'a' + 10; |
4fe88d28 LP |
1057 | |
1058 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1059 | return c - 'A' + 10; |
4fe88d28 LP |
1060 | |
1061 | return -1; | |
1062 | } | |
1063 | ||
66e35261 LP |
1064 | char *hexmem(const void *p, size_t l) { |
1065 | char *r, *z; | |
1066 | const uint8_t *x; | |
1067 | ||
1068 | z = r = malloc(l * 2 + 1); | |
1069 | if (!r) | |
1070 | return NULL; | |
1071 | ||
1072 | for (x = p; x < (const uint8_t*) p + l; x++) { | |
1073 | *(z++) = hexchar(*x >> 4); | |
1074 | *(z++) = hexchar(*x & 15); | |
1075 | } | |
1076 | ||
1077 | *z = 0; | |
1078 | return r; | |
1079 | } | |
1080 | ||
2181a7f5 LP |
1081 | void *unhexmem(const char *p, size_t l) { |
1082 | uint8_t *r, *z; | |
1083 | const char *x; | |
1084 | ||
1085 | assert(p); | |
1086 | ||
1087 | z = r = malloc((l + 1) / 2 + 1); | |
1088 | if (!r) | |
1089 | return NULL; | |
1090 | ||
1091 | for (x = p; x < p + l; x += 2) { | |
1092 | int a, b; | |
1093 | ||
1094 | a = unhexchar(x[0]); | |
1095 | if (x+1 < p + l) | |
1096 | b = unhexchar(x[1]); | |
1097 | else | |
1098 | b = 0; | |
1099 | ||
1100 | *(z++) = (uint8_t) a << 4 | (uint8_t) b; | |
1101 | } | |
1102 | ||
1103 | *z = 0; | |
1104 | return r; | |
1105 | } | |
1106 | ||
4fe88d28 LP |
1107 | char octchar(int x) { |
1108 | return '0' + (x & 7); | |
1109 | } | |
1110 | ||
1111 | int unoctchar(char c) { | |
1112 | ||
1113 | if (c >= '0' && c <= '7') | |
1114 | return c - '0'; | |
1115 | ||
1116 | return -1; | |
1117 | } | |
1118 | ||
5af98f82 LP |
1119 | char decchar(int x) { |
1120 | return '0' + (x % 10); | |
1121 | } | |
1122 | ||
1123 | int undecchar(char c) { | |
1124 | ||
1125 | if (c >= '0' && c <= '9') | |
1126 | return c - '0'; | |
1127 | ||
1128 | return -1; | |
1129 | } | |
1130 | ||
4fe88d28 LP |
1131 | char *cescape(const char *s) { |
1132 | char *r, *t; | |
1133 | const char *f; | |
1134 | ||
1135 | assert(s); | |
1136 | ||
1137 | /* Does C style string escaping. */ | |
1138 | ||
f8e2fb7b LP |
1139 | r = new(char, strlen(s)*4 + 1); |
1140 | if (!r) | |
4fe88d28 LP |
1141 | return NULL; |
1142 | ||
1143 | for (f = s, t = r; *f; f++) | |
1144 | ||
1145 | switch (*f) { | |
1146 | ||
1147 | case '\a': | |
1148 | *(t++) = '\\'; | |
1149 | *(t++) = 'a'; | |
1150 | break; | |
1151 | case '\b': | |
1152 | *(t++) = '\\'; | |
1153 | *(t++) = 'b'; | |
1154 | break; | |
1155 | case '\f': | |
1156 | *(t++) = '\\'; | |
1157 | *(t++) = 'f'; | |
1158 | break; | |
1159 | case '\n': | |
1160 | *(t++) = '\\'; | |
1161 | *(t++) = 'n'; | |
1162 | break; | |
1163 | case '\r': | |
1164 | *(t++) = '\\'; | |
1165 | *(t++) = 'r'; | |
1166 | break; | |
1167 | case '\t': | |
1168 | *(t++) = '\\'; | |
1169 | *(t++) = 't'; | |
1170 | break; | |
1171 | case '\v': | |
1172 | *(t++) = '\\'; | |
1173 | *(t++) = 'v'; | |
1174 | break; | |
1175 | case '\\': | |
1176 | *(t++) = '\\'; | |
1177 | *(t++) = '\\'; | |
1178 | break; | |
1179 | case '"': | |
1180 | *(t++) = '\\'; | |
1181 | *(t++) = '"'; | |
1182 | break; | |
1183 | case '\'': | |
1184 | *(t++) = '\\'; | |
1185 | *(t++) = '\''; | |
1186 | break; | |
1187 | ||
1188 | default: | |
1189 | /* For special chars we prefer octal over | |
1190 | * hexadecimal encoding, simply because glib's | |
1191 | * g_strescape() does the same */ | |
1192 | if ((*f < ' ') || (*f >= 127)) { | |
1193 | *(t++) = '\\'; | |
1194 | *(t++) = octchar((unsigned char) *f >> 6); | |
1195 | *(t++) = octchar((unsigned char) *f >> 3); | |
1196 | *(t++) = octchar((unsigned char) *f); | |
1197 | } else | |
1198 | *(t++) = *f; | |
1199 | break; | |
1200 | } | |
1201 | ||
1202 | *t = 0; | |
1203 | ||
1204 | return r; | |
1205 | } | |
1206 | ||
5b4c61cd | 1207 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1208 | char *r, *t; |
1209 | const char *f; | |
5b4c61cd | 1210 | size_t pl; |
4fe88d28 LP |
1211 | |
1212 | assert(s); | |
1213 | ||
5b4c61cd LP |
1214 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1215 | ||
1216 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1217 | |
5b4c61cd | 1218 | r = new(char, pl+length+1); |
7f110ff9 | 1219 | if (!r) |
4fe88d28 LP |
1220 | return r; |
1221 | ||
5b4c61cd LP |
1222 | if (prefix) |
1223 | memcpy(r, prefix, pl); | |
1224 | ||
1225 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1226 | |
1227 | if (*f != '\\') { | |
1228 | *(t++) = *f; | |
1229 | continue; | |
1230 | } | |
1231 | ||
1232 | f++; | |
1233 | ||
1234 | switch (*f) { | |
1235 | ||
1236 | case 'a': | |
1237 | *(t++) = '\a'; | |
1238 | break; | |
1239 | case 'b': | |
1240 | *(t++) = '\b'; | |
1241 | break; | |
1242 | case 'f': | |
1243 | *(t++) = '\f'; | |
1244 | break; | |
1245 | case 'n': | |
1246 | *(t++) = '\n'; | |
1247 | break; | |
1248 | case 'r': | |
1249 | *(t++) = '\r'; | |
1250 | break; | |
1251 | case 't': | |
1252 | *(t++) = '\t'; | |
1253 | break; | |
1254 | case 'v': | |
1255 | *(t++) = '\v'; | |
1256 | break; | |
1257 | case '\\': | |
1258 | *(t++) = '\\'; | |
1259 | break; | |
1260 | case '"': | |
1261 | *(t++) = '"'; | |
1262 | break; | |
1263 | case '\'': | |
1264 | *(t++) = '\''; | |
1265 | break; | |
1266 | ||
e167fb86 LP |
1267 | case 's': |
1268 | /* This is an extension of the XDG syntax files */ | |
1269 | *(t++) = ' '; | |
1270 | break; | |
1271 | ||
4fe88d28 LP |
1272 | case 'x': { |
1273 | /* hexadecimal encoding */ | |
1274 | int a, b; | |
1275 | ||
7f110ff9 LP |
1276 | a = unhexchar(f[1]); |
1277 | b = unhexchar(f[2]); | |
1278 | ||
e0a33e7b | 1279 | if (a < 0 || b < 0 || (a == 0 && b == 0)) { |
4fe88d28 LP |
1280 | /* Invalid escape code, let's take it literal then */ |
1281 | *(t++) = '\\'; | |
1282 | *(t++) = 'x'; | |
1283 | } else { | |
1284 | *(t++) = (char) ((a << 4) | b); | |
1285 | f += 2; | |
1286 | } | |
1287 | ||
1288 | break; | |
1289 | } | |
1290 | ||
1291 | case '0': | |
1292 | case '1': | |
1293 | case '2': | |
1294 | case '3': | |
1295 | case '4': | |
1296 | case '5': | |
1297 | case '6': | |
1298 | case '7': { | |
1299 | /* octal encoding */ | |
1300 | int a, b, c; | |
1301 | ||
7f110ff9 LP |
1302 | a = unoctchar(f[0]); |
1303 | b = unoctchar(f[1]); | |
1304 | c = unoctchar(f[2]); | |
1305 | ||
e0a33e7b | 1306 | if (a < 0 || b < 0 || c < 0 || (a == 0 && b == 0 && c == 0)) { |
4fe88d28 LP |
1307 | /* Invalid escape code, let's take it literal then */ |
1308 | *(t++) = '\\'; | |
1309 | *(t++) = f[0]; | |
1310 | } else { | |
1311 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1312 | f += 2; | |
1313 | } | |
1314 | ||
1315 | break; | |
1316 | } | |
1317 | ||
1318 | case 0: | |
1319 | /* premature end of string.*/ | |
1320 | *(t++) = '\\'; | |
1321 | goto finish; | |
1322 | ||
1323 | default: | |
1324 | /* Invalid escape code, let's take it literal then */ | |
1325 | *(t++) = '\\'; | |
f3d4cc01 | 1326 | *(t++) = *f; |
4fe88d28 LP |
1327 | break; |
1328 | } | |
1329 | } | |
1330 | ||
1331 | finish: | |
1332 | *t = 0; | |
1333 | return r; | |
1334 | } | |
1335 | ||
5b4c61cd LP |
1336 | char *cunescape_length(const char *s, size_t length) { |
1337 | return cunescape_length_with_prefix(s, length, NULL); | |
1338 | } | |
1339 | ||
6febfd0d | 1340 | char *cunescape(const char *s) { |
5b4c61cd LP |
1341 | assert(s); |
1342 | ||
6febfd0d LP |
1343 | return cunescape_length(s, strlen(s)); |
1344 | } | |
4fe88d28 LP |
1345 | |
1346 | char *xescape(const char *s, const char *bad) { | |
1347 | char *r, *t; | |
1348 | const char *f; | |
1349 | ||
1350 | /* Escapes all chars in bad, in addition to \ and all special | |
1351 | * chars, in \xFF style escaping. May be reversed with | |
1352 | * cunescape. */ | |
1353 | ||
08ace05b LP |
1354 | r = new(char, strlen(s) * 4 + 1); |
1355 | if (!r) | |
4fe88d28 LP |
1356 | return NULL; |
1357 | ||
1358 | for (f = s, t = r; *f; f++) { | |
1359 | ||
b866264a LP |
1360 | if ((*f < ' ') || (*f >= 127) || |
1361 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1362 | *(t++) = '\\'; |
1363 | *(t++) = 'x'; | |
1364 | *(t++) = hexchar(*f >> 4); | |
1365 | *(t++) = hexchar(*f); | |
1366 | } else | |
1367 | *(t++) = *f; | |
1368 | } | |
1369 | ||
1370 | *t = 0; | |
1371 | ||
1372 | return r; | |
1373 | } | |
1374 | ||
67d51650 | 1375 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1376 | char *p; |
1377 | ||
67d51650 | 1378 | assert(t); |
4fe88d28 | 1379 | |
67d51650 | 1380 | for (p = t; *p; p++) |
4fe88d28 LP |
1381 | if (*p >= 'A' && *p <= 'Z') |
1382 | *p = *p - 'A' + 'a'; | |
1383 | ||
67d51650 | 1384 | return t; |
4fe88d28 | 1385 | } |
1dccbe19 | 1386 | |
44a6b1b6 | 1387 | _pure_ static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1388 | assert(filename); |
1389 | ||
1390 | return | |
1391 | filename[0] == '.' || | |
6c78be3c | 1392 | streq(filename, "lost+found") || |
e472d476 LP |
1393 | streq(filename, "aquota.user") || |
1394 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1395 | endswith(filename, ".rpmnew") || |
1396 | endswith(filename, ".rpmsave") || | |
1397 | endswith(filename, ".rpmorig") || | |
1398 | endswith(filename, ".dpkg-old") || | |
1399 | endswith(filename, ".dpkg-new") || | |
1400 | endswith(filename, ".swp"); | |
1401 | } | |
1402 | ||
a228a22f LP |
1403 | bool ignore_file(const char *filename) { |
1404 | assert(filename); | |
1405 | ||
1406 | if (endswith(filename, "~")) | |
93f1a063 | 1407 | return true; |
a228a22f LP |
1408 | |
1409 | return ignore_file_allow_backup(filename); | |
1410 | } | |
1411 | ||
3a0ecb08 | 1412 | int fd_nonblock(int fd, bool nonblock) { |
be8f4e9e | 1413 | int flags, nflags; |
3a0ecb08 LP |
1414 | |
1415 | assert(fd >= 0); | |
1416 | ||
be8f4e9e LP |
1417 | flags = fcntl(fd, F_GETFL, 0); |
1418 | if (flags < 0) | |
3a0ecb08 LP |
1419 | return -errno; |
1420 | ||
1421 | if (nonblock) | |
be8f4e9e | 1422 | nflags = flags | O_NONBLOCK; |
3a0ecb08 | 1423 | else |
be8f4e9e LP |
1424 | nflags = flags & ~O_NONBLOCK; |
1425 | ||
1426 | if (nflags == flags) | |
1427 | return 0; | |
3a0ecb08 | 1428 | |
34b42c96 | 1429 | if (fcntl(fd, F_SETFL, nflags) < 0) |
3a0ecb08 LP |
1430 | return -errno; |
1431 | ||
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | int fd_cloexec(int fd, bool cloexec) { | |
be8f4e9e | 1436 | int flags, nflags; |
3a0ecb08 LP |
1437 | |
1438 | assert(fd >= 0); | |
1439 | ||
be8f4e9e LP |
1440 | flags = fcntl(fd, F_GETFD, 0); |
1441 | if (flags < 0) | |
3a0ecb08 LP |
1442 | return -errno; |
1443 | ||
1444 | if (cloexec) | |
be8f4e9e | 1445 | nflags = flags | FD_CLOEXEC; |
3a0ecb08 | 1446 | else |
be8f4e9e LP |
1447 | nflags = flags & ~FD_CLOEXEC; |
1448 | ||
1449 | if (nflags == flags) | |
1450 | return 0; | |
3a0ecb08 | 1451 | |
34b42c96 | 1452 | if (fcntl(fd, F_SETFD, nflags) < 0) |
3a0ecb08 LP |
1453 | return -errno; |
1454 | ||
1455 | return 0; | |
1456 | } | |
1457 | ||
44a6b1b6 | 1458 | _pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
b19be9eb LP |
1459 | unsigned i; |
1460 | ||
1461 | assert(n_fdset == 0 || fdset); | |
1462 | ||
1463 | for (i = 0; i < n_fdset; i++) | |
1464 | if (fdset[i] == fd) | |
1465 | return true; | |
1466 | ||
1467 | return false; | |
1468 | } | |
1469 | ||
a0d40ac5 | 1470 | int close_all_fds(const int except[], unsigned n_except) { |
e1d75803 | 1471 | _cleanup_closedir_ DIR *d = NULL; |
a0d40ac5 LP |
1472 | struct dirent *de; |
1473 | int r = 0; | |
1474 | ||
b19be9eb LP |
1475 | assert(n_except == 0 || except); |
1476 | ||
1477 | d = opendir("/proc/self/fd"); | |
1478 | if (!d) { | |
1479 | int fd; | |
1480 | struct rlimit rl; | |
1481 | ||
1482 | /* When /proc isn't available (for example in chroots) | |
1483 | * the fallback is brute forcing through the fd | |
1484 | * table */ | |
1485 | ||
1486 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1487 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1488 | ||
1489 | if (fd_in_set(fd, except, n_except)) | |
1490 | continue; | |
1491 | ||
1492 | if (close_nointr(fd) < 0) | |
1493 | if (errno != EBADF && r == 0) | |
1494 | r = -errno; | |
1495 | } | |
1496 | ||
1497 | return r; | |
1498 | } | |
a0d40ac5 LP |
1499 | |
1500 | while ((de = readdir(d))) { | |
a7610064 | 1501 | int fd = -1; |
a0d40ac5 | 1502 | |
a16e1123 | 1503 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1504 | continue; |
1505 | ||
720ce21d LP |
1506 | if (safe_atoi(de->d_name, &fd) < 0) |
1507 | /* Let's better ignore this, just in case */ | |
1508 | continue; | |
a0d40ac5 LP |
1509 | |
1510 | if (fd < 3) | |
1511 | continue; | |
1512 | ||
1513 | if (fd == dirfd(d)) | |
1514 | continue; | |
1515 | ||
b19be9eb LP |
1516 | if (fd_in_set(fd, except, n_except)) |
1517 | continue; | |
a0d40ac5 | 1518 | |
720ce21d | 1519 | if (close_nointr(fd) < 0) { |
2f357920 | 1520 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1521 | if (errno != EBADF && r == 0) |
1522 | r = -errno; | |
2f357920 | 1523 | } |
a0d40ac5 LP |
1524 | } |
1525 | ||
a0d40ac5 LP |
1526 | return r; |
1527 | } | |
1528 | ||
db12775d LP |
1529 | bool chars_intersect(const char *a, const char *b) { |
1530 | const char *p; | |
1531 | ||
1532 | /* Returns true if any of the chars in a are in b. */ | |
1533 | for (p = a; *p; p++) | |
1534 | if (strchr(b, *p)) | |
1535 | return true; | |
1536 | ||
1537 | return false; | |
1538 | } | |
1539 | ||
42856c10 | 1540 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
1541 | static const char table[] = |
1542 | "cifs\0" | |
1543 | "smbfs\0" | |
da92ca5e | 1544 | "sshfs\0" |
a05f97b3 | 1545 | "ncpfs\0" |
dac70dc7 | 1546 | "ncp\0" |
a05f97b3 LP |
1547 | "nfs\0" |
1548 | "nfs4\0" | |
1549 | "gfs\0" | |
67608cad LP |
1550 | "gfs2\0" |
1551 | "glusterfs\0"; | |
1552 | ||
1553 | const char *x; | |
1554 | ||
1555 | x = startswith(fstype, "fuse."); | |
1556 | if (x) | |
1557 | fstype = x; | |
42856c10 | 1558 | |
a05f97b3 | 1559 | return nulstr_contains(table, fstype); |
42856c10 LP |
1560 | } |
1561 | ||
601f6a1e | 1562 | int chvt(int vt) { |
a05f97b3 | 1563 | _cleanup_close_ int fd; |
601f6a1e | 1564 | |
a05f97b3 LP |
1565 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1566 | if (fd < 0) | |
601f6a1e LP |
1567 | return -errno; |
1568 | ||
1569 | if (vt < 0) { | |
1570 | int tiocl[2] = { | |
1571 | TIOCL_GETKMSGREDIRECT, | |
1572 | 0 | |
1573 | }; | |
1574 | ||
a05f97b3 LP |
1575 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1576 | return -errno; | |
601f6a1e LP |
1577 | |
1578 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1579 | } | |
1580 | ||
1581 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1582 | return -errno; |
601f6a1e | 1583 | |
a05f97b3 | 1584 | return 0; |
601f6a1e LP |
1585 | } |
1586 | ||
8f2d43a0 | 1587 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 | 1588 | struct termios old_termios, new_termios; |
e0a33e7b | 1589 | char c, line[LINE_MAX]; |
80876c20 LP |
1590 | |
1591 | assert(f); | |
1592 | assert(ret); | |
1593 | ||
1594 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1595 | new_termios = old_termios; | |
1596 | ||
1597 | new_termios.c_lflag &= ~ICANON; | |
1598 | new_termios.c_cc[VMIN] = 1; | |
1599 | new_termios.c_cc[VTIME] = 0; | |
1600 | ||
1601 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1602 | size_t k; | |
1603 | ||
3a43da28 | 1604 | if (t != USEC_INFINITY) { |
8f2d43a0 LP |
1605 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { |
1606 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1607 | return -ETIMEDOUT; | |
1608 | } | |
1609 | } | |
1610 | ||
80876c20 LP |
1611 | k = fread(&c, 1, 1, f); |
1612 | ||
1613 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1614 | ||
1615 | if (k <= 0) | |
1616 | return -EIO; | |
1617 | ||
1618 | if (need_nl) | |
1619 | *need_nl = c != '\n'; | |
1620 | ||
1621 | *ret = c; | |
1622 | return 0; | |
1623 | } | |
1624 | } | |
1625 | ||
3a43da28 | 1626 | if (t != USEC_INFINITY) { |
8f2d43a0 LP |
1627 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) |
1628 | return -ETIMEDOUT; | |
e0a33e7b | 1629 | } |
8f2d43a0 | 1630 | |
3a8a9163 | 1631 | errno = 0; |
8f2d43a0 | 1632 | if (!fgets(line, sizeof(line), f)) |
3a8a9163 | 1633 | return errno ? -errno : -EIO; |
80876c20 LP |
1634 | |
1635 | truncate_nl(line); | |
1636 | ||
1637 | if (strlen(line) != 1) | |
1638 | return -EBADMSG; | |
1639 | ||
1640 | if (need_nl) | |
1641 | *need_nl = false; | |
1642 | ||
1643 | *ret = line[0]; | |
1644 | return 0; | |
1645 | } | |
1646 | ||
418b9be5 | 1647 | int ask_char(char *ret, const char *replies, const char *text, ...) { |
e0a33e7b | 1648 | int r; |
1b39d4b9 | 1649 | |
80876c20 LP |
1650 | assert(ret); |
1651 | assert(replies); | |
1652 | assert(text); | |
1653 | ||
1654 | for (;;) { | |
1655 | va_list ap; | |
1656 | char c; | |
80876c20 LP |
1657 | bool need_nl = true; |
1658 | ||
8481248b | 1659 | if (on_tty()) |
c1072ea0 | 1660 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1661 | |
80876c20 LP |
1662 | va_start(ap, text); |
1663 | vprintf(text, ap); | |
1664 | va_end(ap); | |
1665 | ||
8481248b | 1666 | if (on_tty()) |
c1072ea0 | 1667 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1668 | |
80876c20 LP |
1669 | fflush(stdout); |
1670 | ||
3a43da28 | 1671 | r = read_one_char(stdin, &c, USEC_INFINITY, &need_nl); |
8f2d43a0 | 1672 | if (r < 0) { |
80876c20 LP |
1673 | |
1674 | if (r == -EBADMSG) { | |
1675 | puts("Bad input, please try again."); | |
1676 | continue; | |
1677 | } | |
1678 | ||
1679 | putchar('\n'); | |
1680 | return r; | |
1681 | } | |
1682 | ||
1683 | if (need_nl) | |
1684 | putchar('\n'); | |
1685 | ||
1686 | if (strchr(replies, c)) { | |
1687 | *ret = c; | |
1688 | return 0; | |
1689 | } | |
1690 | ||
1691 | puts("Read unexpected character, please try again."); | |
1692 | } | |
1693 | } | |
1694 | ||
418b9be5 LP |
1695 | int ask_string(char **ret, const char *text, ...) { |
1696 | assert(ret); | |
1697 | assert(text); | |
1698 | ||
1699 | for (;;) { | |
1700 | char line[LINE_MAX]; | |
1701 | va_list ap; | |
1702 | ||
1703 | if (on_tty()) | |
1704 | fputs(ANSI_HIGHLIGHT_ON, stdout); | |
1705 | ||
1706 | va_start(ap, text); | |
1707 | vprintf(text, ap); | |
1708 | va_end(ap); | |
1709 | ||
1710 | if (on_tty()) | |
1711 | fputs(ANSI_HIGHLIGHT_OFF, stdout); | |
1712 | ||
1713 | fflush(stdout); | |
1714 | ||
1715 | errno = 0; | |
1716 | if (!fgets(line, sizeof(line), stdin)) | |
1717 | return errno ? -errno : -EIO; | |
1718 | ||
1719 | if (!endswith(line, "\n")) | |
1720 | putchar('\n'); | |
1721 | else { | |
1722 | char *s; | |
1723 | ||
1724 | if (isempty(line)) | |
1725 | continue; | |
1726 | ||
1727 | truncate_nl(line); | |
1728 | s = strdup(line); | |
1729 | if (!s) | |
1730 | return -ENOMEM; | |
1731 | ||
1732 | *ret = s; | |
1733 | return 0; | |
1734 | } | |
1735 | } | |
1736 | } | |
1737 | ||
512947d4 | 1738 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
1739 | struct termios termios; |
1740 | int r = 0; | |
3fe5e5d4 LP |
1741 | |
1742 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
1743 | |
1744 | assert(fd >= 0); | |
1745 | ||
eed1d0e3 LP |
1746 | /* We leave locked terminal attributes untouched, so that |
1747 | * Plymouth may set whatever it wants to set, and we don't | |
1748 | * interfere with that. */ | |
3fe5e5d4 LP |
1749 | |
1750 | /* Disable exclusive mode, just in case */ | |
1751 | ioctl(fd, TIOCNXCL); | |
1752 | ||
5c0100a5 | 1753 | /* Switch to text mode */ |
512947d4 MS |
1754 | if (switch_to_text) |
1755 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 1756 | |
3fe5e5d4 | 1757 | /* Enable console unicode mode */ |
df465b3f | 1758 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
1759 | |
1760 | if (tcgetattr(fd, &termios) < 0) { | |
1761 | r = -errno; | |
1762 | goto finish; | |
1763 | } | |
1764 | ||
aaf694ca LP |
1765 | /* We only reset the stuff that matters to the software. How |
1766 | * hardware is set up we don't touch assuming that somebody | |
1767 | * else will do that for us */ | |
1768 | ||
1769 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
1770 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
1771 | termios.c_oflag |= ONLCR; | |
1772 | termios.c_cflag |= CREAD; | |
1773 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
1774 | ||
1775 | termios.c_cc[VINTR] = 03; /* ^C */ | |
1776 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
1777 | termios.c_cc[VERASE] = 0177; | |
1778 | termios.c_cc[VKILL] = 025; /* ^X */ | |
1779 | termios.c_cc[VEOF] = 04; /* ^D */ | |
1780 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
1781 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
1782 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
1783 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
1784 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
1785 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
1786 | termios.c_cc[VEOL] = 0; |
1787 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
1788 | |
1789 | termios.c_cc[VTIME] = 0; | |
1790 | termios.c_cc[VMIN] = 1; | |
1791 | ||
1792 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
1793 | r = -errno; | |
1794 | ||
1795 | finish: | |
1796 | /* Just in case, flush all crap out */ | |
1797 | tcflush(fd, TCIOFLUSH); | |
1798 | ||
1799 | return r; | |
1800 | } | |
1801 | ||
6ea832a2 | 1802 | int reset_terminal(const char *name) { |
03e334a1 | 1803 | _cleanup_close_ int fd = -1; |
6ea832a2 LP |
1804 | |
1805 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
1806 | if (fd < 0) | |
1807 | return fd; | |
1808 | ||
03e334a1 | 1809 | return reset_terminal_fd(fd, true); |
6ea832a2 LP |
1810 | } |
1811 | ||
80876c20 LP |
1812 | int open_terminal(const char *name, int mode) { |
1813 | int fd, r; | |
f73f76ac | 1814 | unsigned c = 0; |
80876c20 | 1815 | |
f73f76ac LP |
1816 | /* |
1817 | * If a TTY is in the process of being closed opening it might | |
1818 | * cause EIO. This is horribly awful, but unlikely to be | |
1819 | * changed in the kernel. Hence we work around this problem by | |
1820 | * retrying a couple of times. | |
1821 | * | |
1822 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
1823 | */ | |
1824 | ||
dd94c17e LP |
1825 | assert(!(mode & O_CREAT)); |
1826 | ||
f73f76ac | 1827 | for (;;) { |
dd94c17e | 1828 | fd = open(name, mode, 0); |
af6da548 | 1829 | if (fd >= 0) |
f73f76ac LP |
1830 | break; |
1831 | ||
1832 | if (errno != EIO) | |
1833 | return -errno; | |
1834 | ||
af6da548 | 1835 | /* Max 1s in total */ |
f73f76ac LP |
1836 | if (c >= 20) |
1837 | return -errno; | |
1838 | ||
1839 | usleep(50 * USEC_PER_MSEC); | |
1840 | c++; | |
1841 | } | |
1842 | ||
1843 | if (fd < 0) | |
80876c20 LP |
1844 | return -errno; |
1845 | ||
af6da548 LP |
1846 | r = isatty(fd); |
1847 | if (r < 0) { | |
03e334a1 | 1848 | safe_close(fd); |
80876c20 LP |
1849 | return -errno; |
1850 | } | |
1851 | ||
1852 | if (!r) { | |
03e334a1 | 1853 | safe_close(fd); |
80876c20 LP |
1854 | return -ENOTTY; |
1855 | } | |
1856 | ||
1857 | return fd; | |
1858 | } | |
1859 | ||
1860 | int flush_fd(int fd) { | |
b92bea5d ZJS |
1861 | struct pollfd pollfd = { |
1862 | .fd = fd, | |
1863 | .events = POLLIN, | |
1864 | }; | |
80876c20 LP |
1865 | |
1866 | for (;;) { | |
20c03b7b | 1867 | char buf[LINE_MAX]; |
80876c20 LP |
1868 | ssize_t l; |
1869 | int r; | |
1870 | ||
e62d8c39 ZJS |
1871 | r = poll(&pollfd, 1, 0); |
1872 | if (r < 0) { | |
80876c20 LP |
1873 | if (errno == EINTR) |
1874 | continue; | |
1875 | ||
1876 | return -errno; | |
80876c20 | 1877 | |
e62d8c39 | 1878 | } else if (r == 0) |
80876c20 LP |
1879 | return 0; |
1880 | ||
e62d8c39 ZJS |
1881 | l = read(fd, buf, sizeof(buf)); |
1882 | if (l < 0) { | |
80876c20 LP |
1883 | |
1884 | if (errno == EINTR) | |
1885 | continue; | |
1886 | ||
1887 | if (errno == EAGAIN) | |
1888 | return 0; | |
1889 | ||
1890 | return -errno; | |
e62d8c39 | 1891 | } else if (l == 0) |
80876c20 LP |
1892 | return 0; |
1893 | } | |
1894 | } | |
1895 | ||
af6da548 LP |
1896 | int acquire_terminal( |
1897 | const char *name, | |
1898 | bool fail, | |
1899 | bool force, | |
1900 | bool ignore_tiocstty_eperm, | |
1901 | usec_t timeout) { | |
1902 | ||
4a0ff478 | 1903 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 1904 | usec_t ts = 0; |
80876c20 LP |
1905 | |
1906 | assert(name); | |
1907 | ||
1908 | /* We use inotify to be notified when the tty is closed. We | |
1909 | * create the watch before checking if we can actually acquire | |
1910 | * it, so that we don't lose any event. | |
1911 | * | |
1912 | * Note: strictly speaking this actually watches for the | |
1913 | * device being closed, it does *not* really watch whether a | |
1914 | * tty loses its controlling process. However, unless some | |
1915 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
1916 | * its tty otherwise this will not become a problem. As long | |
1917 | * as the administrator makes sure not configure any service | |
1918 | * on the same tty as an untrusted user this should not be a | |
1919 | * problem. (Which he probably should not do anyway.) */ | |
1920 | ||
3a43da28 | 1921 | if (timeout != USEC_INFINITY) |
af6da548 LP |
1922 | ts = now(CLOCK_MONOTONIC); |
1923 | ||
80876c20 | 1924 | if (!fail && !force) { |
3a43da28 | 1925 | notify = inotify_init1(IN_CLOEXEC | (timeout != USEC_INFINITY ? IN_NONBLOCK : 0)); |
af6da548 | 1926 | if (notify < 0) { |
80876c20 LP |
1927 | r = -errno; |
1928 | goto fail; | |
1929 | } | |
1930 | ||
af6da548 LP |
1931 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
1932 | if (wd < 0) { | |
80876c20 LP |
1933 | r = -errno; |
1934 | goto fail; | |
1935 | } | |
1936 | } | |
1937 | ||
1938 | for (;;) { | |
b92bea5d ZJS |
1939 | struct sigaction sa_old, sa_new = { |
1940 | .sa_handler = SIG_IGN, | |
1941 | .sa_flags = SA_RESTART, | |
1942 | }; | |
1943 | ||
af6da548 LP |
1944 | if (notify >= 0) { |
1945 | r = flush_fd(notify); | |
1946 | if (r < 0) | |
e3d1855b | 1947 | goto fail; |
af6da548 | 1948 | } |
80876c20 LP |
1949 | |
1950 | /* We pass here O_NOCTTY only so that we can check the return | |
1951 | * value TIOCSCTTY and have a reliable way to figure out if we | |
1952 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
1953 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
1954 | if (fd < 0) | |
6ea832a2 | 1955 | return fd; |
80876c20 | 1956 | |
32c4bef8 LP |
1957 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1958 | * if we already own the tty. */ | |
32c4bef8 LP |
1959 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
1960 | ||
80876c20 | 1961 | /* First, try to get the tty */ |
32c4bef8 LP |
1962 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
1963 | r = -errno; | |
1964 | ||
1965 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
1966 | |
1967 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
1968 | * returning EPERM, i.e. when very likely we already | |
1969 | * are have this controlling terminal. */ | |
32c4bef8 | 1970 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
1971 | r = 0; |
1972 | ||
32c4bef8 | 1973 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
1974 | goto fail; |
1975 | } | |
1976 | ||
1977 | if (r >= 0) | |
1978 | break; | |
1979 | ||
1980 | assert(!fail); | |
1981 | assert(!force); | |
1982 | assert(notify >= 0); | |
1983 | ||
1984 | for (;;) { | |
f601daa7 | 1985 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 1986 | ssize_t l; |
f601daa7 | 1987 | struct inotify_event *e; |
80876c20 | 1988 | |
3a43da28 | 1989 | if (timeout != USEC_INFINITY) { |
af6da548 LP |
1990 | usec_t n; |
1991 | ||
1992 | n = now(CLOCK_MONOTONIC); | |
1993 | if (ts + timeout < n) { | |
1994 | r = -ETIMEDOUT; | |
1995 | goto fail; | |
1996 | } | |
1997 | ||
1998 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
1999 | if (r < 0) | |
2000 | goto fail; | |
2001 | ||
2002 | if (r == 0) { | |
2003 | r = -ETIMEDOUT; | |
2004 | goto fail; | |
2005 | } | |
2006 | } | |
2007 | ||
2008 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
2009 | if (l < 0) { | |
80876c20 | 2010 | |
af6da548 | 2011 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
2012 | continue; |
2013 | ||
2014 | r = -errno; | |
2015 | goto fail; | |
2016 | } | |
2017 | ||
2018 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2019 | |
f601daa7 LP |
2020 | while (l > 0) { |
2021 | size_t step; | |
80876c20 | 2022 | |
f601daa7 | 2023 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2024 | r = -EIO; |
f601daa7 LP |
2025 | goto fail; |
2026 | } | |
80876c20 | 2027 | |
f601daa7 LP |
2028 | step = sizeof(struct inotify_event) + e->len; |
2029 | assert(step <= (size_t) l); | |
80876c20 | 2030 | |
f601daa7 LP |
2031 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2032 | l -= step; | |
80876c20 LP |
2033 | } |
2034 | ||
2035 | break; | |
2036 | } | |
2037 | ||
2038 | /* We close the tty fd here since if the old session | |
2039 | * ended our handle will be dead. It's important that | |
2040 | * we do this after sleeping, so that we don't enter | |
2041 | * an endless loop. */ | |
03e334a1 | 2042 | safe_close(fd); |
80876c20 LP |
2043 | } |
2044 | ||
03e334a1 | 2045 | safe_close(notify); |
80876c20 | 2046 | |
512947d4 MS |
2047 | r = reset_terminal_fd(fd, true); |
2048 | if (r < 0) | |
80876c20 LP |
2049 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2050 | ||
2051 | return fd; | |
2052 | ||
2053 | fail: | |
03e334a1 LP |
2054 | safe_close(fd); |
2055 | safe_close(notify); | |
80876c20 LP |
2056 | |
2057 | return r; | |
2058 | } | |
2059 | ||
2060 | int release_terminal(void) { | |
e62d8c39 | 2061 | int r = 0; |
b92bea5d ZJS |
2062 | struct sigaction sa_old, sa_new = { |
2063 | .sa_handler = SIG_IGN, | |
2064 | .sa_flags = SA_RESTART, | |
2065 | }; | |
7fd1b19b | 2066 | _cleanup_close_ int fd; |
80876c20 | 2067 | |
e62d8c39 ZJS |
2068 | fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC); |
2069 | if (fd < 0) | |
80876c20 LP |
2070 | return -errno; |
2071 | ||
57cd2192 LP |
2072 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2073 | * by our own TIOCNOTTY */ | |
57cd2192 LP |
2074 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
2075 | ||
80876c20 LP |
2076 | if (ioctl(fd, TIOCNOTTY) < 0) |
2077 | r = -errno; | |
2078 | ||
57cd2192 LP |
2079 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2080 | ||
80876c20 LP |
2081 | return r; |
2082 | } | |
2083 | ||
9a34ec5f LP |
2084 | int sigaction_many(const struct sigaction *sa, ...) { |
2085 | va_list ap; | |
2086 | int r = 0, sig; | |
2087 | ||
2088 | va_start(ap, sa); | |
2089 | while ((sig = va_arg(ap, int)) > 0) | |
2090 | if (sigaction(sig, sa, NULL) < 0) | |
2091 | r = -errno; | |
2092 | va_end(ap); | |
2093 | ||
2094 | return r; | |
2095 | } | |
2096 | ||
2097 | int ignore_signals(int sig, ...) { | |
b92bea5d ZJS |
2098 | struct sigaction sa = { |
2099 | .sa_handler = SIG_IGN, | |
2100 | .sa_flags = SA_RESTART, | |
2101 | }; | |
9a34ec5f LP |
2102 | va_list ap; |
2103 | int r = 0; | |
a337c6fc | 2104 | |
9a34ec5f LP |
2105 | if (sigaction(sig, &sa, NULL) < 0) |
2106 | r = -errno; | |
2107 | ||
2108 | va_start(ap, sig); | |
2109 | while ((sig = va_arg(ap, int)) > 0) | |
2110 | if (sigaction(sig, &sa, NULL) < 0) | |
2111 | r = -errno; | |
2112 | va_end(ap); | |
2113 | ||
2114 | return r; | |
2115 | } | |
2116 | ||
2117 | int default_signals(int sig, ...) { | |
b92bea5d ZJS |
2118 | struct sigaction sa = { |
2119 | .sa_handler = SIG_DFL, | |
2120 | .sa_flags = SA_RESTART, | |
2121 | }; | |
9a34ec5f LP |
2122 | va_list ap; |
2123 | int r = 0; | |
2124 | ||
9a34ec5f LP |
2125 | if (sigaction(sig, &sa, NULL) < 0) |
2126 | r = -errno; | |
2127 | ||
2128 | va_start(ap, sig); | |
2129 | while ((sig = va_arg(ap, int)) > 0) | |
2130 | if (sigaction(sig, &sa, NULL) < 0) | |
2131 | r = -errno; | |
2132 | va_end(ap); | |
2133 | ||
2134 | return r; | |
a337c6fc LP |
2135 | } |
2136 | ||
3d94f76c | 2137 | void safe_close_pair(int p[]) { |
8d567588 LP |
2138 | assert(p); |
2139 | ||
3d94f76c LP |
2140 | if (p[0] == p[1]) { |
2141 | /* Special case pairs which use the same fd in both | |
2142 | * directions... */ | |
2143 | p[0] = p[1] = safe_close(p[0]); | |
2144 | return; | |
8d567588 LP |
2145 | } |
2146 | ||
3d94f76c LP |
2147 | p[0] = safe_close(p[0]); |
2148 | p[1] = safe_close(p[1]); | |
8d567588 LP |
2149 | } |
2150 | ||
eb22ac37 | 2151 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2152 | uint8_t *p = buf; |
8d567588 LP |
2153 | ssize_t n = 0; |
2154 | ||
2155 | assert(fd >= 0); | |
2156 | assert(buf); | |
2157 | ||
8d567588 LP |
2158 | while (nbytes > 0) { |
2159 | ssize_t k; | |
2160 | ||
7d5dd5e0 LP |
2161 | k = read(fd, p, nbytes); |
2162 | if (k < 0 && errno == EINTR) | |
2163 | continue; | |
8d567588 | 2164 | |
7d5dd5e0 | 2165 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 | 2166 | |
7d5dd5e0 LP |
2167 | /* We knowingly ignore any return value here, |
2168 | * and expect that any error/EOF is reported | |
2169 | * via read() */ | |
8d567588 | 2170 | |
3a43da28 | 2171 | fd_wait_for_event(fd, POLLIN, USEC_INFINITY); |
7d5dd5e0 LP |
2172 | continue; |
2173 | } | |
8d567588 | 2174 | |
7d5dd5e0 | 2175 | if (k <= 0) |
8d567588 | 2176 | return n > 0 ? n : (k < 0 ? -errno : 0); |
8d567588 LP |
2177 | |
2178 | p += k; | |
2179 | nbytes -= k; | |
2180 | n += k; | |
2181 | } | |
2182 | ||
2183 | return n; | |
2184 | } | |
2185 | ||
eb22ac37 | 2186 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2187 | const uint8_t *p = buf; |
eb22ac37 LP |
2188 | ssize_t n = 0; |
2189 | ||
2190 | assert(fd >= 0); | |
2191 | assert(buf); | |
2192 | ||
eb22ac37 LP |
2193 | while (nbytes > 0) { |
2194 | ssize_t k; | |
2195 | ||
fe652127 | 2196 | k = write(fd, p, nbytes); |
7d5dd5e0 LP |
2197 | if (k < 0 && errno == EINTR) |
2198 | continue; | |
eb22ac37 | 2199 | |
7d5dd5e0 | 2200 | if (k < 0 && errno == EAGAIN && do_poll) { |
eb22ac37 | 2201 | |
7d5dd5e0 LP |
2202 | /* We knowingly ignore any return value here, |
2203 | * and expect that any error/EOF is reported | |
2204 | * via write() */ | |
eb22ac37 | 2205 | |
3a43da28 | 2206 | fd_wait_for_event(fd, POLLOUT, USEC_INFINITY); |
7d5dd5e0 LP |
2207 | continue; |
2208 | } | |
eb22ac37 | 2209 | |
7d5dd5e0 | 2210 | if (k <= 0) |
eb22ac37 | 2211 | return n > 0 ? n : (k < 0 ? -errno : 0); |
eb22ac37 LP |
2212 | |
2213 | p += k; | |
2214 | nbytes -= k; | |
2215 | n += k; | |
2216 | } | |
2217 | ||
2218 | return n; | |
2219 | } | |
2220 | ||
5556b5fe LP |
2221 | int parse_size(const char *t, off_t base, off_t *size) { |
2222 | ||
2223 | /* Soo, sometimes we want to parse IEC binary suffxies, and | |
2224 | * sometimes SI decimal suffixes. This function can parse | |
2225 | * both. Which one is the right way depends on the | |
2226 | * context. Wikipedia suggests that SI is customary for | |
2227 | * hardrware metrics and network speeds, while IEC is | |
2228 | * customary for most data sizes used by software and volatile | |
2229 | * (RAM) memory. Hence be careful which one you pick! | |
2230 | * | |
2231 | * In either case we use just K, M, G as suffix, and not Ki, | |
2232 | * Mi, Gi or so (as IEC would suggest). That's because that's | |
2233 | * frickin' ugly. But this means you really need to make sure | |
2234 | * to document which base you are parsing when you use this | |
2235 | * call. */ | |
2236 | ||
2237 | struct table { | |
ab1f0633 | 2238 | const char *suffix; |
b32ff512 | 2239 | unsigned long long factor; |
5556b5fe LP |
2240 | }; |
2241 | ||
2242 | static const struct table iec[] = { | |
32895bb3 | 2243 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
840292be ZJS |
2244 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2245 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
2246 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2247 | { "M", 1024ULL*1024ULL }, | |
2248 | { "K", 1024ULL }, | |
2249 | { "B", 1 }, | |
ab1f0633 LP |
2250 | { "", 1 }, |
2251 | }; | |
2252 | ||
5556b5fe | 2253 | static const struct table si[] = { |
5556b5fe | 2254 | { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
840292be ZJS |
2255 | { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
2256 | { "T", 1000ULL*1000ULL*1000ULL*1000ULL }, | |
2257 | { "G", 1000ULL*1000ULL*1000ULL }, | |
2258 | { "M", 1000ULL*1000ULL }, | |
2259 | { "K", 1000ULL }, | |
2260 | { "B", 1 }, | |
5556b5fe LP |
2261 | { "", 1 }, |
2262 | }; | |
2263 | ||
2264 | const struct table *table; | |
ab1f0633 | 2265 | const char *p; |
b32ff512 | 2266 | unsigned long long r = 0; |
840292be | 2267 | unsigned n_entries, start_pos = 0; |
ab1f0633 LP |
2268 | |
2269 | assert(t); | |
5556b5fe LP |
2270 | assert(base == 1000 || base == 1024); |
2271 | assert(size); | |
2272 | ||
2273 | if (base == 1000) { | |
2274 | table = si; | |
2275 | n_entries = ELEMENTSOF(si); | |
2276 | } else { | |
2277 | table = iec; | |
2278 | n_entries = ELEMENTSOF(iec); | |
2279 | } | |
ab1f0633 LP |
2280 | |
2281 | p = t; | |
2282 | do { | |
2283 | long long l; | |
9480794b ZJS |
2284 | unsigned long long l2; |
2285 | double frac = 0; | |
ab1f0633 LP |
2286 | char *e; |
2287 | unsigned i; | |
2288 | ||
2289 | errno = 0; | |
2290 | l = strtoll(p, &e, 10); | |
2291 | ||
8333c77e | 2292 | if (errno > 0) |
ab1f0633 LP |
2293 | return -errno; |
2294 | ||
2295 | if (l < 0) | |
2296 | return -ERANGE; | |
2297 | ||
2298 | if (e == p) | |
2299 | return -EINVAL; | |
2300 | ||
9480794b ZJS |
2301 | if (*e == '.') { |
2302 | e++; | |
2303 | if (*e >= '0' && *e <= '9') { | |
2304 | char *e2; | |
2305 | ||
2306 | /* strotoull itself would accept space/+/- */ | |
2307 | l2 = strtoull(e, &e2, 10); | |
2308 | ||
2309 | if (errno == ERANGE) | |
2310 | return -errno; | |
2311 | ||
2312 | /* Ignore failure. E.g. 10.M is valid */ | |
2313 | frac = l2; | |
2314 | for (; e < e2; e++) | |
2315 | frac /= 10; | |
2316 | } | |
2317 | } | |
2318 | ||
ab1f0633 LP |
2319 | e += strspn(e, WHITESPACE); |
2320 | ||
840292be | 2321 | for (i = start_pos; i < n_entries; i++) |
ab1f0633 | 2322 | if (startswith(e, table[i].suffix)) { |
b32ff512 | 2323 | unsigned long long tmp; |
9480794b | 2324 | if ((unsigned long long) l + (frac > 0) > ULLONG_MAX / table[i].factor) |
b32ff512 | 2325 | return -ERANGE; |
9480794b | 2326 | tmp = l * table[i].factor + (unsigned long long) (frac * table[i].factor); |
b32ff512 ZJS |
2327 | if (tmp > ULLONG_MAX - r) |
2328 | return -ERANGE; | |
2329 | ||
2330 | r += tmp; | |
2331 | if ((unsigned long long) (off_t) r != r) | |
2332 | return -ERANGE; | |
2333 | ||
ab1f0633 | 2334 | p = e + strlen(table[i].suffix); |
840292be ZJS |
2335 | |
2336 | start_pos = i + 1; | |
ab1f0633 LP |
2337 | break; |
2338 | } | |
2339 | ||
5556b5fe | 2340 | if (i >= n_entries) |
ab1f0633 LP |
2341 | return -EINVAL; |
2342 | ||
b32ff512 | 2343 | } while (*p); |
ab1f0633 | 2344 | |
5556b5fe | 2345 | *size = r; |
ab1f0633 LP |
2346 | |
2347 | return 0; | |
2348 | } | |
2349 | ||
843d2643 LP |
2350 | int make_stdio(int fd) { |
2351 | int r, s, t; | |
2352 | ||
2353 | assert(fd >= 0); | |
2354 | ||
73836c5c LP |
2355 | r = dup3(fd, STDIN_FILENO, 0); |
2356 | s = dup3(fd, STDOUT_FILENO, 0); | |
2357 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2358 | |
2359 | if (fd >= 3) | |
03e334a1 | 2360 | safe_close(fd); |
843d2643 LP |
2361 | |
2362 | if (r < 0 || s < 0 || t < 0) | |
2363 | return -errno; | |
2364 | ||
73836c5c | 2365 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2366 | |
843d2643 LP |
2367 | return 0; |
2368 | } | |
2369 | ||
ade509ce LP |
2370 | int make_null_stdio(void) { |
2371 | int null_fd; | |
2372 | ||
cd3bd60a LP |
2373 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2374 | if (null_fd < 0) | |
ade509ce LP |
2375 | return -errno; |
2376 | ||
2377 | return make_stdio(null_fd); | |
2378 | } | |
2379 | ||
8407a5d0 LP |
2380 | bool is_device_path(const char *path) { |
2381 | ||
2382 | /* Returns true on paths that refer to a device, either in | |
2383 | * sysfs or in /dev */ | |
2384 | ||
2385 | return | |
2386 | path_startswith(path, "/dev/") || | |
2387 | path_startswith(path, "/sys/"); | |
2388 | } | |
2389 | ||
01f78473 | 2390 | int dir_is_empty(const char *path) { |
a05f97b3 | 2391 | _cleanup_closedir_ DIR *d; |
01f78473 | 2392 | |
a05f97b3 LP |
2393 | d = opendir(path); |
2394 | if (!d) | |
01f78473 LP |
2395 | return -errno; |
2396 | ||
2397 | for (;;) { | |
7d5e9c0f | 2398 | struct dirent *de; |
01f78473 | 2399 | |
3fd11280 FW |
2400 | errno = 0; |
2401 | de = readdir(d); | |
2402 | if (!de && errno != 0) | |
2403 | return -errno; | |
01f78473 | 2404 | |
a05f97b3 LP |
2405 | if (!de) |
2406 | return 1; | |
01f78473 | 2407 | |
a05f97b3 LP |
2408 | if (!ignore_file(de->d_name)) |
2409 | return 0; | |
2410 | } | |
01f78473 LP |
2411 | } |
2412 | ||
844ec79b ZJS |
2413 | char* dirname_malloc(const char *path) { |
2414 | char *d, *dir, *dir2; | |
2415 | ||
2416 | d = strdup(path); | |
2417 | if (!d) | |
2418 | return NULL; | |
2419 | dir = dirname(d); | |
2420 | assert(dir); | |
2421 | ||
2422 | if (dir != d) { | |
2423 | dir2 = strdup(dir); | |
2424 | free(d); | |
2425 | return dir2; | |
2426 | } | |
2427 | ||
2428 | return dir; | |
2429 | } | |
2430 | ||
b89446bb | 2431 | int dev_urandom(void *p, size_t n) { |
a05f97b3 | 2432 | _cleanup_close_ int fd; |
9bf3b535 | 2433 | ssize_t k; |
d3782d60 | 2434 | |
ac0930c8 LP |
2435 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2436 | if (fd < 0) | |
b89446bb | 2437 | return errno == ENOENT ? -ENOSYS : -errno; |
d3782d60 | 2438 | |
9bf3b535 | 2439 | k = loop_read(fd, p, n, true); |
b89446bb LP |
2440 | if (k < 0) |
2441 | return (int) k; | |
2442 | if ((size_t) k != n) | |
2443 | return -EIO; | |
2444 | ||
2445 | return 0; | |
2446 | } | |
2447 | ||
2448 | void random_bytes(void *p, size_t n) { | |
2449 | static bool srand_called = false; | |
2450 | uint8_t *q; | |
2451 | int r; | |
d3782d60 | 2452 | |
b89446bb LP |
2453 | r = dev_urandom(p, n); |
2454 | if (r >= 0) | |
2455 | return; | |
d3782d60 | 2456 | |
b89446bb LP |
2457 | /* If some idiot made /dev/urandom unavailable to us, he'll |
2458 | * get a PRNG instead. */ | |
d3782d60 | 2459 | |
9bf3b535 | 2460 | if (!srand_called) { |
b89446bb | 2461 | unsigned x = 0; |
a3b6fafe | 2462 | |
9bf3b535 LP |
2463 | #ifdef HAVE_SYS_AUXV_H |
2464 | /* The kernel provides us with a bit of entropy in | |
2465 | * auxv, so let's try to make use of that to seed the | |
2466 | * pseudo-random generator. It's better than | |
2467 | * nothing... */ | |
a3b6fafe | 2468 | |
9bf3b535 LP |
2469 | void *auxv; |
2470 | ||
2471 | auxv = (void*) getauxval(AT_RANDOM); | |
2472 | if (auxv) | |
b89446bb | 2473 | x ^= *(unsigned*) auxv; |
9bf3b535 | 2474 | #endif |
a3b6fafe | 2475 | |
b89446bb LP |
2476 | x ^= (unsigned) now(CLOCK_REALTIME); |
2477 | x ^= (unsigned) gettid(); | |
2478 | ||
2479 | srand(x); | |
9bf3b535 LP |
2480 | srand_called = true; |
2481 | } | |
a3b6fafe | 2482 | |
9bf3b535 LP |
2483 | for (q = p; q < (uint8_t*) p + n; q ++) |
2484 | *q = rand(); | |
a3b6fafe LP |
2485 | } |
2486 | ||
5b6319dc LP |
2487 | void rename_process(const char name[8]) { |
2488 | assert(name); | |
2489 | ||
5d6b1584 LP |
2490 | /* This is a like a poor man's setproctitle(). It changes the |
2491 | * comm field, argv[0], and also the glibc's internally used | |
2492 | * name of the process. For the first one a limit of 16 chars | |
2493 | * applies, to the second one usually one of 10 (i.e. length | |
2494 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2495 | * "systemd"). If you pass a longer string it will be | |
2496 | * truncated */ | |
5b6319dc | 2497 | |
5d6b1584 | 2498 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2499 | |
2500 | if (program_invocation_name) | |
2501 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2502 | |
2503 | if (saved_argc > 0) { | |
2504 | int i; | |
2505 | ||
2506 | if (saved_argv[0]) | |
2507 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2508 | ||
2509 | for (i = 1; i < saved_argc; i++) { | |
2510 | if (!saved_argv[i]) | |
2511 | break; | |
2512 | ||
29804cc1 | 2513 | memzero(saved_argv[i], strlen(saved_argv[i])); |
9a0e6896 LP |
2514 | } |
2515 | } | |
5b6319dc LP |
2516 | } |
2517 | ||
7d793605 LP |
2518 | void sigset_add_many(sigset_t *ss, ...) { |
2519 | va_list ap; | |
2520 | int sig; | |
2521 | ||
2522 | assert(ss); | |
2523 | ||
2524 | va_start(ap, ss); | |
2525 | while ((sig = va_arg(ap, int)) > 0) | |
2526 | assert_se(sigaddset(ss, sig) == 0); | |
2527 | va_end(ap); | |
2528 | } | |
2529 | ||
856a5a7d LP |
2530 | int sigprocmask_many(int how, ...) { |
2531 | va_list ap; | |
2532 | sigset_t ss; | |
2533 | int sig; | |
2534 | ||
2535 | assert_se(sigemptyset(&ss) == 0); | |
2536 | ||
2537 | va_start(ap, how); | |
2538 | while ((sig = va_arg(ap, int)) > 0) | |
2539 | assert_se(sigaddset(&ss, sig) == 0); | |
2540 | va_end(ap); | |
2541 | ||
2542 | if (sigprocmask(how, &ss, NULL) < 0) | |
2543 | return -errno; | |
2544 | ||
2545 | return 0; | |
2546 | } | |
2547 | ||
ef2f1067 LP |
2548 | char* gethostname_malloc(void) { |
2549 | struct utsname u; | |
2550 | ||
2551 | assert_se(uname(&u) >= 0); | |
2552 | ||
344de609 | 2553 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2554 | return strdup(u.nodename); |
2555 | ||
2556 | return strdup(u.sysname); | |
2557 | } | |
2558 | ||
344de609 LP |
2559 | bool hostname_is_set(void) { |
2560 | struct utsname u; | |
2561 | ||
2562 | assert_se(uname(&u) >= 0); | |
2563 | ||
2564 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2565 | } | |
2566 | ||
7c5f152a | 2567 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2568 | long bufsize; |
a05f97b3 LP |
2569 | char *name; |
2570 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2571 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2572 | |
2573 | /* Shortcut things to avoid NSS lookups */ | |
2574 | if (uid == 0) | |
2575 | return strdup("root"); | |
2576 | ||
7c5f152a LP |
2577 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2578 | if (bufsize <= 0) | |
ef2f1067 LP |
2579 | bufsize = 4096; |
2580 | ||
7c5f152a LP |
2581 | buf = malloc(bufsize); |
2582 | if (!buf) | |
ef2f1067 LP |
2583 | return NULL; |
2584 | ||
a05f97b3 LP |
2585 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2586 | return strdup(pw->pw_name); | |
ef2f1067 | 2587 | |
de0671ee | 2588 | if (asprintf(&name, UID_FMT, uid) < 0) |
ef2f1067 LP |
2589 | return NULL; |
2590 | ||
2591 | return name; | |
2592 | } | |
2593 | ||
7c5f152a LP |
2594 | char* getlogname_malloc(void) { |
2595 | uid_t uid; | |
2596 | struct stat st; | |
2597 | ||
2598 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2599 | uid = st.st_uid; | |
2600 | else | |
2601 | uid = getuid(); | |
2602 | ||
2603 | return lookup_uid(uid); | |
2604 | } | |
2605 | ||
2606 | char *getusername_malloc(void) { | |
2607 | const char *e; | |
2608 | ||
2609 | e = getenv("USER"); | |
2610 | if (e) | |
2611 | return strdup(e); | |
2612 | ||
2613 | return lookup_uid(getuid()); | |
2614 | } | |
2615 | ||
fc116c6a LP |
2616 | int getttyname_malloc(int fd, char **r) { |
2617 | char path[PATH_MAX], *c; | |
618e02c7 | 2618 | int k; |
8c6db833 LP |
2619 | |
2620 | assert(r); | |
ef2f1067 | 2621 | |
a05f97b3 | 2622 | k = ttyname_r(fd, path, sizeof(path)); |
27373e44 | 2623 | if (k > 0) |
618e02c7 | 2624 | return -k; |
ef2f1067 LP |
2625 | |
2626 | char_array_0(path); | |
2627 | ||
a05f97b3 LP |
2628 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2629 | if (!c) | |
8c6db833 LP |
2630 | return -ENOMEM; |
2631 | ||
2632 | *r = c; | |
2633 | return 0; | |
2634 | } | |
2635 | ||
fc116c6a LP |
2636 | int getttyname_harder(int fd, char **r) { |
2637 | int k; | |
2638 | char *s; | |
2639 | ||
a05f97b3 LP |
2640 | k = getttyname_malloc(fd, &s); |
2641 | if (k < 0) | |
fc116c6a LP |
2642 | return k; |
2643 | ||
2644 | if (streq(s, "tty")) { | |
2645 | free(s); | |
4d6d6518 | 2646 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2647 | } |
2648 | ||
2649 | *r = s; | |
2650 | return 0; | |
2651 | } | |
2652 | ||
4d6d6518 | 2653 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
b4696bce SP |
2654 | int r; |
2655 | _cleanup_free_ char *line = NULL; | |
2656 | const char *p; | |
fc116c6a | 2657 | unsigned long ttynr; |
fc116c6a | 2658 | |
49aa47c7 | 2659 | assert(pid >= 0); |
49aa47c7 | 2660 | |
b4696bce SP |
2661 | p = procfs_file_alloca(pid, "stat"); |
2662 | r = read_one_line_file(p, &line); | |
2663 | if (r < 0) | |
2664 | return r; | |
fc116c6a | 2665 | |
4d6d6518 LP |
2666 | p = strrchr(line, ')'); |
2667 | if (!p) | |
fc116c6a LP |
2668 | return -EIO; |
2669 | ||
2670 | p++; | |
2671 | ||
2672 | if (sscanf(p, " " | |
2673 | "%*c " /* state */ | |
2674 | "%*d " /* ppid */ | |
2675 | "%*d " /* pgrp */ | |
2676 | "%*d " /* session */ | |
2677 | "%lu ", /* ttynr */ | |
2678 | &ttynr) != 1) | |
2679 | return -EIO; | |
2680 | ||
11dc5d2b LP |
2681 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2682 | return -ENOENT; | |
2683 | ||
0bee65f0 LP |
2684 | if (d) |
2685 | *d = (dev_t) ttynr; | |
2686 | ||
fc116c6a LP |
2687 | return 0; |
2688 | } | |
2689 | ||
4d6d6518 | 2690 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
833fce28 LP |
2691 | char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *b = NULL; |
2692 | _cleanup_free_ char *s = NULL; | |
2693 | const char *p; | |
fc116c6a | 2694 | dev_t devnr; |
833fce28 | 2695 | int k; |
fc116c6a LP |
2696 | |
2697 | assert(r); | |
2698 | ||
4d6d6518 LP |
2699 | k = get_ctty_devnr(pid, &devnr); |
2700 | if (k < 0) | |
fc116c6a LP |
2701 | return k; |
2702 | ||
2703 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
fc116c6a | 2704 | |
23406ce5 LP |
2705 | k = readlink_malloc(fn, &s); |
2706 | if (k < 0) { | |
fc116c6a LP |
2707 | |
2708 | if (k != -ENOENT) | |
2709 | return k; | |
2710 | ||
46824d0e LP |
2711 | /* This is an ugly hack */ |
2712 | if (major(devnr) == 136) { | |
de0671ee | 2713 | asprintf(&b, "pts/%u", minor(devnr)); |
833fce28 | 2714 | goto finish; |
46824d0e LP |
2715 | } |
2716 | ||
fc116c6a LP |
2717 | /* Probably something like the ptys which have no |
2718 | * symlink in /dev/char. Let's return something | |
2719 | * vaguely useful. */ | |
2720 | ||
23406ce5 | 2721 | b = strdup(fn + 5); |
833fce28 | 2722 | goto finish; |
fc116c6a LP |
2723 | } |
2724 | ||
2725 | if (startswith(s, "/dev/")) | |
2726 | p = s + 5; | |
2727 | else if (startswith(s, "../")) | |
2728 | p = s + 3; | |
2729 | else | |
2730 | p = s; | |
2731 | ||
2732 | b = strdup(p); | |
fc116c6a | 2733 | |
833fce28 | 2734 | finish: |
fc116c6a LP |
2735 | if (!b) |
2736 | return -ENOMEM; | |
2737 | ||
2738 | *r = b; | |
46824d0e LP |
2739 | if (_devnr) |
2740 | *_devnr = devnr; | |
2741 | ||
fc116c6a LP |
2742 | return 0; |
2743 | } | |
2744 | ||
f56d5db9 | 2745 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
dede0e33 | 2746 | _cleanup_closedir_ DIR *d = NULL; |
8c6db833 LP |
2747 | int ret = 0; |
2748 | ||
2749 | assert(fd >= 0); | |
2750 | ||
2751 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2752 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2753 | |
d4d046e3 LP |
2754 | d = fdopendir(fd); |
2755 | if (!d) { | |
03e334a1 | 2756 | safe_close(fd); |
4c633005 LP |
2757 | |
2758 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2759 | } |
2760 | ||
2761 | for (;;) { | |
7d5e9c0f | 2762 | struct dirent *de; |
7925c22a LP |
2763 | bool is_dir, keep_around; |
2764 | struct stat st; | |
8c6db833 LP |
2765 | int r; |
2766 | ||
3fd11280 FW |
2767 | errno = 0; |
2768 | de = readdir(d); | |
dede0e33 ZJS |
2769 | if (!de) { |
2770 | if (errno != 0 && ret == 0) | |
3fd11280 | 2771 | ret = -errno; |
dede0e33 | 2772 | return ret; |
8c6db833 LP |
2773 | } |
2774 | ||
8c6db833 LP |
2775 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) |
2776 | continue; | |
2777 | ||
7925c22a LP |
2778 | if (de->d_type == DT_UNKNOWN || |
2779 | honour_sticky || | |
2780 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2781 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2782 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2783 | ret = -errno; |
2784 | continue; | |
2785 | } | |
2786 | ||
2787 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2788 | keep_around = |
2789 | honour_sticky && | |
2790 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2791 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2792 | } else { |
8c6db833 | 2793 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2794 | keep_around = false; |
ad293f5a | 2795 | } |
8c6db833 LP |
2796 | |
2797 | if (is_dir) { | |
2798 | int subdir_fd; | |
8c6db833 | 2799 | |
597f43c7 | 2800 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
2801 | if (root_dev && st.st_dev != root_dev->st_dev) |
2802 | continue; | |
8c6db833 | 2803 | |
7925c22a LP |
2804 | subdir_fd = openat(fd, de->d_name, |
2805 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
2806 | if (subdir_fd < 0) { | |
2807 | if (ret == 0 && errno != ENOENT) | |
2808 | ret = -errno; | |
2809 | continue; | |
2810 | } | |
2811 | ||
b3d28469 | 2812 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
2813 | if (r < 0 && ret == 0) |
2814 | ret = r; | |
2815 | ||
2816 | if (!keep_around) | |
2817 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
2818 | if (ret == 0 && errno != ENOENT) |
2819 | ret = -errno; | |
2820 | } | |
2821 | ||
2822 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
2823 | |
2824 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 2825 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2826 | ret = -errno; |
2827 | } | |
2828 | } | |
2829 | } | |
8c6db833 LP |
2830 | } |
2831 | ||
44a6b1b6 | 2832 | _pure_ static int is_temporary_fs(struct statfs *s) { |
943aad8c | 2833 | assert(s); |
73020ab2 SL |
2834 | |
2835 | return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) || | |
2836 | F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC); | |
943aad8c ZJS |
2837 | } |
2838 | ||
f56d5db9 LP |
2839 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
2840 | struct statfs s; | |
2841 | ||
2842 | assert(fd >= 0); | |
2843 | ||
2844 | if (fstatfs(fd, &s) < 0) { | |
03e334a1 | 2845 | safe_close(fd); |
f56d5db9 LP |
2846 | return -errno; |
2847 | } | |
2848 | ||
2849 | /* We refuse to clean disk file systems with this call. This | |
2850 | * is extra paranoia just to be sure we never ever remove | |
2851 | * non-state data */ | |
943aad8c | 2852 | if (!is_temporary_fs(&s)) { |
f56d5db9 | 2853 | log_error("Attempted to remove disk file system, and we can't allow that."); |
03e334a1 | 2854 | safe_close(fd); |
f56d5db9 LP |
2855 | return -EPERM; |
2856 | } | |
2857 | ||
2858 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
2859 | } | |
2860 | ||
2861 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
2862 | int fd, r; | |
2863 | struct statfs s; | |
8c6db833 LP |
2864 | |
2865 | assert(path); | |
2866 | ||
f56d5db9 LP |
2867 | /* We refuse to clean the root file system with this |
2868 | * call. This is extra paranoia to never cause a really | |
2869 | * seriously broken system. */ | |
2870 | if (path_equal(path, "/")) { | |
2871 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
2872 | return -EPERM; | |
2873 | } | |
461b1822 | 2874 | |
d4d046e3 LP |
2875 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
2876 | if (fd < 0) { | |
8c6db833 LP |
2877 | |
2878 | if (errno != ENOTDIR) | |
2879 | return -errno; | |
2880 | ||
f56d5db9 LP |
2881 | if (!dangerous) { |
2882 | if (statfs(path, &s) < 0) | |
2883 | return -errno; | |
2884 | ||
943aad8c | 2885 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2886 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2887 | return -EPERM; | |
2888 | } | |
2889 | } | |
2890 | ||
8c6db833 | 2891 | if (delete_root && !only_dirs) |
d4d046e3 | 2892 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
2893 | return -errno; |
2894 | ||
2895 | return 0; | |
2896 | } | |
2897 | ||
f56d5db9 LP |
2898 | if (!dangerous) { |
2899 | if (fstatfs(fd, &s) < 0) { | |
03e334a1 | 2900 | safe_close(fd); |
f56d5db9 LP |
2901 | return -errno; |
2902 | } | |
ad293f5a | 2903 | |
943aad8c | 2904 | if (!is_temporary_fs(&s)) { |
f56d5db9 | 2905 | log_error("Attempted to remove disk file system, and we can't allow that."); |
03e334a1 | 2906 | safe_close(fd); |
f56d5db9 LP |
2907 | return -EPERM; |
2908 | } | |
2909 | } | |
2910 | ||
2911 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
2912 | if (delete_root) { |
2913 | ||
8d53b453 | 2914 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 2915 | return r; |
8c6db833 | 2916 | |
e27796a0 | 2917 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
2918 | if (r == 0) |
2919 | r = -errno; | |
2920 | } | |
ad293f5a | 2921 | } |
8c6db833 LP |
2922 | |
2923 | return r; | |
2924 | } | |
2925 | ||
f56d5db9 LP |
2926 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
2927 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
2928 | } | |
2929 | ||
2930 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
2931 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
2932 | } | |
2933 | ||
8c6db833 LP |
2934 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
2935 | assert(path); | |
2936 | ||
2937 | /* Under the assumption that we are running privileged we | |
2938 | * first change the access mode and only then hand out | |
2939 | * ownership to avoid a window where access is too open. */ | |
2940 | ||
8d53b453 LP |
2941 | if (mode != (mode_t) -1) |
2942 | if (chmod(path, mode) < 0) | |
2943 | return -errno; | |
8c6db833 | 2944 | |
8d53b453 LP |
2945 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2946 | if (chown(path, uid, gid) < 0) | |
2947 | return -errno; | |
8c6db833 LP |
2948 | |
2949 | return 0; | |
ef2f1067 LP |
2950 | } |
2951 | ||
f4b47811 LP |
2952 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
2953 | assert(fd >= 0); | |
2954 | ||
2955 | /* Under the assumption that we are running privileged we | |
2956 | * first change the access mode and only then hand out | |
2957 | * ownership to avoid a window where access is too open. */ | |
2958 | ||
9588bc32 LP |
2959 | if (mode != (mode_t) -1) |
2960 | if (fchmod(fd, mode) < 0) | |
2961 | return -errno; | |
f4b47811 | 2962 | |
9588bc32 LP |
2963 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2964 | if (fchown(fd, uid, gid) < 0) | |
2965 | return -errno; | |
f4b47811 LP |
2966 | |
2967 | return 0; | |
2968 | } | |
2969 | ||
82c121a4 LP |
2970 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2971 | cpu_set_t *r; | |
2972 | unsigned n = 1024; | |
2973 | ||
2974 | /* Allocates the cpuset in the right size */ | |
2975 | ||
2976 | for (;;) { | |
2977 | if (!(r = CPU_ALLOC(n))) | |
2978 | return NULL; | |
2979 | ||
2980 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2981 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2982 | ||
2983 | if (ncpus) | |
2984 | *ncpus = n; | |
2985 | ||
2986 | return r; | |
2987 | } | |
2988 | ||
2989 | CPU_FREE(r); | |
2990 | ||
2991 | if (errno != EINVAL) | |
2992 | return NULL; | |
2993 | ||
2994 | n *= 2; | |
2995 | } | |
2996 | } | |
2997 | ||
984a2be4 | 2998 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) { |
9ab7a8d2 | 2999 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
3000 | _cleanup_free_ char *s = NULL; |
3001 | _cleanup_close_ int fd = -1; | |
b92bea5d | 3002 | struct iovec iovec[6] = {}; |
81beb750 | 3003 | int n = 0; |
984a2be4 | 3004 | static bool prev_ephemeral; |
9e58ff9c LP |
3005 | |
3006 | assert(format); | |
3007 | ||
9ab7a8d2 | 3008 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
3009 | * optional and go exclusively to the console. */ |
3010 | ||
3011 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 3012 | return log_oom(); |
9e58ff9c | 3013 | |
67e5cc4f | 3014 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 3015 | if (fd < 0) |
669bec5d | 3016 | return fd; |
9e58ff9c | 3017 | |
67e5cc4f | 3018 | if (ellipse) { |
9ab7a8d2 MS |
3019 | char *e; |
3020 | size_t emax, sl; | |
3021 | int c; | |
3022 | ||
67e5cc4f LP |
3023 | c = fd_columns(fd); |
3024 | if (c <= 0) | |
3025 | c = 80; | |
81beb750 | 3026 | |
669bec5d | 3027 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
3028 | |
3029 | emax = c - sl - 1; | |
3030 | if (emax < 3) | |
3031 | emax = 3; | |
81beb750 | 3032 | |
67e5cc4f LP |
3033 | e = ellipsize(s, emax, 75); |
3034 | if (e) { | |
3035 | free(s); | |
3036 | s = e; | |
3037 | } | |
81beb750 LP |
3038 | } |
3039 | ||
984a2be4 MS |
3040 | if (prev_ephemeral) |
3041 | IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE); | |
3042 | prev_ephemeral = ephemeral; | |
3043 | ||
9ab7a8d2 MS |
3044 | if (status) { |
3045 | if (!isempty(status)) { | |
3046 | IOVEC_SET_STRING(iovec[n++], "["); | |
3047 | IOVEC_SET_STRING(iovec[n++], status); | |
3048 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3049 | } else | |
3050 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3051 | } |
3052 | ||
9ab7a8d2 | 3053 | IOVEC_SET_STRING(iovec[n++], s); |
984a2be4 MS |
3054 | if (!ephemeral) |
3055 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 3056 | |
669bec5d LP |
3057 | if (writev(fd, iovec, n) < 0) |
3058 | return -errno; | |
9e58ff9c | 3059 | |
669bec5d | 3060 | return 0; |
9e58ff9c LP |
3061 | } |
3062 | ||
984a2be4 | 3063 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) { |
c846ff47 | 3064 | va_list ap; |
669bec5d | 3065 | int r; |
c846ff47 LP |
3066 | |
3067 | assert(format); | |
3068 | ||
3069 | va_start(ap, format); | |
984a2be4 | 3070 | r = status_vprintf(status, ellipse, ephemeral, format, ap); |
c846ff47 | 3071 | va_end(ap); |
669bec5d LP |
3072 | |
3073 | return r; | |
c846ff47 LP |
3074 | } |
3075 | ||
fab56fc5 LP |
3076 | char *replace_env(const char *format, char **env) { |
3077 | enum { | |
3078 | WORD, | |
c24eb49e | 3079 | CURLY, |
fab56fc5 LP |
3080 | VARIABLE |
3081 | } state = WORD; | |
3082 | ||
3083 | const char *e, *word = format; | |
3084 | char *r = NULL, *k; | |
3085 | ||
3086 | assert(format); | |
3087 | ||
3088 | for (e = format; *e; e ++) { | |
3089 | ||
3090 | switch (state) { | |
3091 | ||
3092 | case WORD: | |
3093 | if (*e == '$') | |
c24eb49e | 3094 | state = CURLY; |
fab56fc5 LP |
3095 | break; |
3096 | ||
c24eb49e LP |
3097 | case CURLY: |
3098 | if (*e == '{') { | |
fab56fc5 LP |
3099 | if (!(k = strnappend(r, word, e-word-1))) |
3100 | goto fail; | |
3101 | ||
3102 | free(r); | |
3103 | r = k; | |
3104 | ||
3105 | word = e-1; | |
3106 | state = VARIABLE; | |
3107 | ||
3108 | } else if (*e == '$') { | |
3109 | if (!(k = strnappend(r, word, e-word))) | |
3110 | goto fail; | |
3111 | ||
3112 | free(r); | |
3113 | r = k; | |
3114 | ||
3115 | word = e+1; | |
3116 | state = WORD; | |
3117 | } else | |
3118 | state = WORD; | |
3119 | break; | |
3120 | ||
3121 | case VARIABLE: | |
c24eb49e | 3122 | if (*e == '}') { |
b95cf362 | 3123 | const char *t; |
fab56fc5 | 3124 | |
4d1a6904 | 3125 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 3126 | |
4d1a6904 LP |
3127 | k = strappend(r, t); |
3128 | if (!k) | |
b95cf362 | 3129 | goto fail; |
fab56fc5 | 3130 | |
b95cf362 LP |
3131 | free(r); |
3132 | r = k; | |
fab56fc5 | 3133 | |
b95cf362 | 3134 | word = e+1; |
fab56fc5 LP |
3135 | state = WORD; |
3136 | } | |
3137 | break; | |
3138 | } | |
3139 | } | |
3140 | ||
3141 | if (!(k = strnappend(r, word, e-word))) | |
3142 | goto fail; | |
3143 | ||
3144 | free(r); | |
3145 | return k; | |
3146 | ||
3147 | fail: | |
3148 | free(r); | |
3149 | return NULL; | |
3150 | } | |
3151 | ||
3152 | char **replace_env_argv(char **argv, char **env) { | |
3153 | char **r, **i; | |
c24eb49e LP |
3154 | unsigned k = 0, l = 0; |
3155 | ||
3156 | l = strv_length(argv); | |
fab56fc5 | 3157 | |
c24eb49e | 3158 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3159 | return NULL; |
3160 | ||
3161 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3162 | |
3163 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3164 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3165 | char *e; | |
3166 | char **w, **m; | |
3167 | unsigned q; | |
c24eb49e | 3168 | |
4d1a6904 LP |
3169 | e = strv_env_get(env, *i+1); |
3170 | if (e) { | |
c24eb49e LP |
3171 | |
3172 | if (!(m = strv_split_quoted(e))) { | |
3173 | r[k] = NULL; | |
3174 | strv_free(r); | |
3175 | return NULL; | |
3176 | } | |
b95cf362 LP |
3177 | } else |
3178 | m = NULL; | |
c24eb49e | 3179 | |
b95cf362 LP |
3180 | q = strv_length(m); |
3181 | l = l + q - 1; | |
c24eb49e | 3182 | |
b95cf362 LP |
3183 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3184 | r[k] = NULL; | |
3185 | strv_free(r); | |
3186 | strv_free(m); | |
3187 | return NULL; | |
3188 | } | |
c24eb49e | 3189 | |
b95cf362 LP |
3190 | r = w; |
3191 | if (m) { | |
c24eb49e LP |
3192 | memcpy(r + k, m, q * sizeof(char*)); |
3193 | free(m); | |
c24eb49e | 3194 | } |
b95cf362 LP |
3195 | |
3196 | k += q; | |
3197 | continue; | |
c24eb49e LP |
3198 | } |
3199 | ||
3200 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3201 | if (!(r[k++] = replace_env(*i, env))) { |
3202 | strv_free(r); | |
3203 | return NULL; | |
3204 | } | |
3205 | } | |
3206 | ||
3207 | r[k] = NULL; | |
3208 | return r; | |
3209 | } | |
3210 | ||
81beb750 | 3211 | int fd_columns(int fd) { |
b92bea5d | 3212 | struct winsize ws = {}; |
81beb750 LP |
3213 | |
3214 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3215 | return -errno; | |
3216 | ||
3217 | if (ws.ws_col <= 0) | |
3218 | return -EIO; | |
3219 | ||
3220 | return ws.ws_col; | |
3221 | } | |
3222 | ||
28917d7d | 3223 | unsigned columns(void) { |
fa776d8e | 3224 | const char *e; |
7009eec2 | 3225 | int c; |
fa776d8e | 3226 | |
28917d7d LP |
3227 | if (_likely_(cached_columns > 0)) |
3228 | return cached_columns; | |
11f96fac | 3229 | |
28917d7d LP |
3230 | c = 0; |
3231 | e = getenv("COLUMNS"); | |
3232 | if (e) | |
7009eec2 | 3233 | safe_atoi(e, &c); |
fa776d8e | 3234 | |
28917d7d LP |
3235 | if (c <= 0) |
3236 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3237 | |
28917d7d LP |
3238 | if (c <= 0) |
3239 | c = 80; | |
11f96fac | 3240 | |
28917d7d LP |
3241 | cached_columns = c; |
3242 | return c; | |
11f96fac ZJS |
3243 | } |
3244 | ||
8f2d43a0 | 3245 | int fd_lines(int fd) { |
b92bea5d | 3246 | struct winsize ws = {}; |
8f2d43a0 LP |
3247 | |
3248 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3249 | return -errno; | |
3250 | ||
3251 | if (ws.ws_row <= 0) | |
3252 | return -EIO; | |
3253 | ||
3254 | return ws.ws_row; | |
3255 | } | |
3256 | ||
3257 | unsigned lines(void) { | |
8f2d43a0 | 3258 | const char *e; |
ed757c0c | 3259 | unsigned l; |
8f2d43a0 | 3260 | |
ed757c0c LP |
3261 | if (_likely_(cached_lines > 0)) |
3262 | return cached_lines; | |
8f2d43a0 | 3263 | |
ed757c0c | 3264 | l = 0; |
8f2d43a0 LP |
3265 | e = getenv("LINES"); |
3266 | if (e) | |
ed757c0c | 3267 | safe_atou(e, &l); |
8f2d43a0 | 3268 | |
ed757c0c LP |
3269 | if (l <= 0) |
3270 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3271 | |
ed757c0c LP |
3272 | if (l <= 0) |
3273 | l = 24; | |
8f2d43a0 | 3274 | |
ed757c0c LP |
3275 | cached_lines = l; |
3276 | return cached_lines; | |
3277 | } | |
3278 | ||
3279 | /* intended to be used as a SIGWINCH sighandler */ | |
3280 | void columns_lines_cache_reset(int signum) { | |
3281 | cached_columns = 0; | |
3282 | cached_lines = 0; | |
3283 | } | |
3284 | ||
3285 | bool on_tty(void) { | |
3286 | static int cached_on_tty = -1; | |
3287 | ||
3288 | if (_unlikely_(cached_on_tty < 0)) | |
3289 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3290 | ||
3291 | return cached_on_tty; | |
8f2d43a0 LP |
3292 | } |
3293 | ||
9d9951a4 HH |
3294 | int files_same(const char *filea, const char *fileb) { |
3295 | struct stat a, b; | |
b4f10a5e | 3296 | |
9d9951a4 | 3297 | if (stat(filea, &a) < 0) |
b4f10a5e LP |
3298 | return -errno; |
3299 | ||
9d9951a4 | 3300 | if (stat(fileb, &b) < 0) |
b4f10a5e LP |
3301 | return -errno; |
3302 | ||
9d9951a4 HH |
3303 | return a.st_dev == b.st_dev && |
3304 | a.st_ino == b.st_ino; | |
3305 | } | |
3306 | ||
3307 | int running_in_chroot(void) { | |
3308 | int ret; | |
3309 | ||
3310 | ret = files_same("/proc/1/root", "/"); | |
3311 | if (ret < 0) | |
3312 | return ret; | |
3313 | ||
3314 | return ret == 0; | |
b4f10a5e LP |
3315 | } |
3316 | ||
f405e86d | 3317 | static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
72f59706 | 3318 | size_t x; |
8fe914ec LP |
3319 | char *r; |
3320 | ||
3321 | assert(s); | |
3322 | assert(percent <= 100); | |
72f59706 | 3323 | assert(new_length >= 3); |
8fe914ec | 3324 | |
72f59706 LP |
3325 | if (old_length <= 3 || old_length <= new_length) |
3326 | return strndup(s, old_length); | |
8fe914ec | 3327 | |
72f59706 LP |
3328 | r = new0(char, new_length+1); |
3329 | if (!r) | |
a6f0104a | 3330 | return NULL; |
8fe914ec | 3331 | |
72f59706 | 3332 | x = (new_length * percent) / 100; |
8fe914ec | 3333 | |
72f59706 LP |
3334 | if (x > new_length - 3) |
3335 | x = new_length - 3; | |
8fe914ec LP |
3336 | |
3337 | memcpy(r, s, x); | |
3338 | r[x] = '.'; | |
3339 | r[x+1] = '.'; | |
3340 | r[x+2] = '.'; | |
3341 | memcpy(r + x + 3, | |
72f59706 LP |
3342 | s + old_length - (new_length - x - 3), |
3343 | new_length - x - 3); | |
8fe914ec LP |
3344 | |
3345 | return r; | |
3346 | } | |
3347 | ||
f405e86d SL |
3348 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3349 | size_t x; | |
3350 | char *e; | |
3351 | const char *i, *j; | |
3352 | unsigned k, len, len2; | |
3353 | ||
3354 | assert(s); | |
3355 | assert(percent <= 100); | |
3356 | assert(new_length >= 3); | |
3357 | ||
3358 | /* if no multibyte characters use ascii_ellipsize_mem for speed */ | |
3359 | if (ascii_is_valid(s)) | |
3360 | return ascii_ellipsize_mem(s, old_length, new_length, percent); | |
3361 | ||
3362 | if (old_length <= 3 || old_length <= new_length) | |
3363 | return strndup(s, old_length); | |
3364 | ||
3365 | x = (new_length * percent) / 100; | |
3366 | ||
3367 | if (x > new_length - 3) | |
3368 | x = new_length - 3; | |
3369 | ||
3370 | k = 0; | |
3371 | for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) { | |
3372 | int c; | |
3373 | ||
3374 | c = utf8_encoded_to_unichar(i); | |
3375 | if (c < 0) | |
3376 | return NULL; | |
3377 | k += unichar_iswide(c) ? 2 : 1; | |
3378 | } | |
3379 | ||
3380 | if (k > x) /* last character was wide and went over quota */ | |
3381 | x ++; | |
3382 | ||
3383 | for (j = s + old_length; k < new_length && j > i; ) { | |
3384 | int c; | |
3385 | ||
3386 | j = utf8_prev_char(j); | |
3387 | c = utf8_encoded_to_unichar(j); | |
3388 | if (c < 0) | |
3389 | return NULL; | |
3390 | k += unichar_iswide(c) ? 2 : 1; | |
3391 | } | |
3392 | assert(i <= j); | |
3393 | ||
3394 | /* we don't actually need to ellipsize */ | |
3395 | if (i == j) | |
3396 | return memdup(s, old_length + 1); | |
3397 | ||
3398 | /* make space for ellipsis */ | |
3399 | j = utf8_next_char(j); | |
3400 | ||
3401 | len = i - s; | |
3402 | len2 = s + old_length - j; | |
3403 | e = new(char, len + 3 + len2 + 1); | |
3404 | if (!e) | |
3405 | return NULL; | |
3406 | ||
3407 | /* | |
3408 | printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n", | |
3409 | old_length, new_length, x, len, len2, k); | |
3410 | */ | |
3411 | ||
3412 | memcpy(e, s, len); | |
3413 | e[len] = 0xe2; /* tri-dot ellipsis: … */ | |
3414 | e[len + 1] = 0x80; | |
3415 | e[len + 2] = 0xa6; | |
3416 | ||
3417 | memcpy(e + len + 3, j, len2 + 1); | |
3418 | ||
3419 | return e; | |
3420 | } | |
3421 | ||
72f59706 LP |
3422 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3423 | return ellipsize_mem(s, strlen(s), length, percent); | |
3424 | } | |
3425 | ||
c38dfac9 | 3426 | int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode) { |
03e334a1 | 3427 | _cleanup_close_ int fd; |
c38dfac9 | 3428 | int r; |
f6144808 LP |
3429 | |
3430 | assert(path); | |
3431 | ||
c38dfac9 KS |
3432 | if (parents) |
3433 | mkdir_parents(path, 0755); | |
73836c5c | 3434 | |
c38dfac9 | 3435 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, mode > 0 ? mode : 0644); |
73836c5c | 3436 | if (fd < 0) |
f6144808 LP |
3437 | return -errno; |
3438 | ||
c38dfac9 KS |
3439 | if (mode > 0) { |
3440 | r = fchmod(fd, mode); | |
3441 | if (r < 0) | |
3442 | return -errno; | |
3443 | } | |
3444 | ||
359efc59 | 3445 | if (uid != (uid_t) -1 || gid != (gid_t) -1) { |
c38dfac9 KS |
3446 | r = fchown(fd, uid, gid); |
3447 | if (r < 0) | |
3448 | return -errno; | |
3449 | } | |
3450 | ||
3a43da28 | 3451 | if (stamp != USEC_INFINITY) { |
c38dfac9 KS |
3452 | struct timespec ts[2]; |
3453 | ||
3454 | timespec_store(&ts[0], stamp); | |
359efc59 | 3455 | ts[1] = ts[0]; |
c38dfac9 KS |
3456 | r = futimens(fd, ts); |
3457 | } else | |
3458 | r = futimens(fd, NULL); | |
3459 | if (r < 0) | |
3460 | return -errno; | |
3461 | ||
f6144808 LP |
3462 | return 0; |
3463 | } | |
afea26ad | 3464 | |
c38dfac9 | 3465 | int touch(const char *path) { |
3a43da28 | 3466 | return touch_file(path, false, USEC_INFINITY, (uid_t) -1, (gid_t) -1, 0); |
c38dfac9 KS |
3467 | } |
3468 | ||
97c4a07d | 3469 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3470 | size_t l; |
3471 | assert(s); | |
3472 | ||
73836c5c LP |
3473 | /* This is rather stupid, simply removes the heading and |
3474 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3475 | * escaping or anything. We should make this smarter one |
3476 | * day...*/ | |
73836c5c | 3477 | |
31ed59c5 LP |
3478 | l = strlen(s); |
3479 | if (l < 2) | |
11ce3427 LP |
3480 | return strdup(s); |
3481 | ||
97c4a07d | 3482 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3483 | return strndup(s+1, l-2); |
3484 | ||
3485 | return strdup(s); | |
3486 | } | |
3487 | ||
5f7c426e | 3488 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3489 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3490 | char *eq, *r; | |
5f7c426e | 3491 | |
57f30678 LP |
3492 | eq = strchr(s, '='); |
3493 | if (!eq) { | |
3494 | char *t; | |
5f7c426e | 3495 | |
57f30678 LP |
3496 | r = strdup(s); |
3497 | if (!r) | |
5f7c426e LP |
3498 | return NULL; |
3499 | ||
57f30678 LP |
3500 | t = strstrip(r); |
3501 | if (t == r) | |
3502 | return r; | |
3503 | ||
3504 | memmove(r, t, strlen(t) + 1); | |
3505 | return r; | |
5f7c426e LP |
3506 | } |
3507 | ||
57f30678 LP |
3508 | name = strndup(s, eq - s); |
3509 | if (!name) | |
5f7c426e LP |
3510 | return NULL; |
3511 | ||
57f30678 LP |
3512 | p = strdup(eq + 1); |
3513 | if (!p) | |
5f7c426e | 3514 | return NULL; |
5f7c426e LP |
3515 | |
3516 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3517 | if (!value) |
5f7c426e | 3518 | return NULL; |
5f7c426e | 3519 | |
57f30678 | 3520 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3521 | r = NULL; |
3522 | ||
5f7c426e LP |
3523 | return r; |
3524 | } | |
3525 | ||
8e12a6ae | 3526 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3527 | siginfo_t dummy; |
3528 | ||
2e78aa99 | 3529 | assert(pid >= 1); |
1968a360 LP |
3530 | |
3531 | if (!status) | |
3532 | status = &dummy; | |
2e78aa99 LP |
3533 | |
3534 | for (;;) { | |
8e12a6ae LP |
3535 | zero(*status); |
3536 | ||
3537 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3538 | |
3539 | if (errno == EINTR) | |
3540 | continue; | |
3541 | ||
3542 | return -errno; | |
3543 | } | |
3544 | ||
3545 | return 0; | |
3546 | } | |
3547 | } | |
3548 | ||
0659e8ba LS |
3549 | /* |
3550 | * Return values: | |
3551 | * < 0 : wait_for_terminate() failed to get the state of the | |
3552 | * process, the process was terminated by a signal, or | |
3553 | * failed for an unknown reason. | |
3554 | * >=0 : The process terminated normally, and its exit code is | |
3555 | * returned. | |
3556 | * | |
3557 | * That is, success is indicated by a return value of zero, and an | |
3558 | * error is indicated by a non-zero value. | |
3559 | */ | |
97c4a07d LP |
3560 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3561 | int r; | |
3562 | siginfo_t status; | |
3563 | ||
3564 | assert(name); | |
3565 | assert(pid > 1); | |
3566 | ||
d87be9b0 LP |
3567 | r = wait_for_terminate(pid, &status); |
3568 | if (r < 0) { | |
97c4a07d LP |
3569 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3570 | return r; | |
3571 | } | |
3572 | ||
3573 | if (status.si_code == CLD_EXITED) { | |
3574 | if (status.si_status != 0) { | |
3575 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3576 | return status.si_status; |
97c4a07d LP |
3577 | } |
3578 | ||
3579 | log_debug("%s succeeded.", name); | |
3580 | return 0; | |
3581 | ||
3582 | } else if (status.si_code == CLD_KILLED || | |
3583 | status.si_code == CLD_DUMPED) { | |
3584 | ||
3585 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3586 | return -EPROTO; | |
3587 | } | |
3588 | ||
3589 | log_warning("%s failed due to unknown reason.", name); | |
3590 | return -EPROTO; | |
97c4a07d LP |
3591 | } |
3592 | ||
919ce0b7 | 3593 | noreturn void freeze(void) { |
720ce21d LP |
3594 | |
3595 | /* Make sure nobody waits for us on a socket anymore */ | |
3596 | close_all_fds(NULL, 0); | |
3597 | ||
c29597a1 LP |
3598 | sync(); |
3599 | ||
3c14d26c LP |
3600 | for (;;) |
3601 | pause(); | |
3602 | } | |
3603 | ||
00dc5d76 LP |
3604 | bool null_or_empty(struct stat *st) { |
3605 | assert(st); | |
3606 | ||
3607 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3608 | return true; | |
3609 | ||
c8f26f42 | 3610 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3611 | return true; |
3612 | ||
3613 | return false; | |
3614 | } | |
3615 | ||
83096483 LP |
3616 | int null_or_empty_path(const char *fn) { |
3617 | struct stat st; | |
3618 | ||
3619 | assert(fn); | |
3620 | ||
3621 | if (stat(fn, &st) < 0) | |
3622 | return -errno; | |
3623 | ||
3624 | return null_or_empty(&st); | |
3625 | } | |
3626 | ||
ed88bcfb ZJS |
3627 | int null_or_empty_fd(int fd) { |
3628 | struct stat st; | |
3629 | ||
3630 | assert(fd >= 0); | |
3631 | ||
3632 | if (fstat(fd, &st) < 0) | |
3633 | return -errno; | |
3634 | ||
3635 | return null_or_empty(&st); | |
3636 | } | |
3637 | ||
a247755d | 3638 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3639 | int nfd; |
3640 | DIR *d; | |
3641 | ||
dd94c17e LP |
3642 | assert(!(flags & O_CREAT)); |
3643 | ||
3644 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
73836c5c | 3645 | if (nfd < 0) |
c4731d11 LP |
3646 | return NULL; |
3647 | ||
73836c5c LP |
3648 | d = fdopendir(nfd); |
3649 | if (!d) { | |
03e334a1 | 3650 | safe_close(nfd); |
c4731d11 LP |
3651 | return NULL; |
3652 | } | |
3653 | ||
3654 | return d; | |
3b63d2d3 LP |
3655 | } |
3656 | ||
8a0867d6 LP |
3657 | int signal_from_string_try_harder(const char *s) { |
3658 | int signo; | |
3659 | assert(s); | |
3660 | ||
73836c5c LP |
3661 | signo = signal_from_string(s); |
3662 | if (signo <= 0) | |
8a0867d6 LP |
3663 | if (startswith(s, "SIG")) |
3664 | return signal_from_string(s+3); | |
3665 | ||
3666 | return signo; | |
3667 | } | |
3668 | ||
383182b5 | 3669 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
22f5f628 | 3670 | _cleanup_free_ char *t = NULL, *u = NULL; |
22f5f628 | 3671 | size_t enc_len; |
e23a0ce8 | 3672 | |
383182b5 | 3673 | u = unquote(tagvalue, "\"\'"); |
6db615c1 | 3674 | if (!u) |
383182b5 | 3675 | return NULL; |
e23a0ce8 | 3676 | |
1d5989fd | 3677 | enc_len = strlen(u) * 4 + 1; |
22f5f628 | 3678 | t = new(char, enc_len); |
6db615c1 | 3679 | if (!t) |
383182b5 | 3680 | return NULL; |
e23a0ce8 | 3681 | |
8f6ce71f | 3682 | if (encode_devnode_name(u, t, enc_len) < 0) |
22f5f628 | 3683 | return NULL; |
e23a0ce8 | 3684 | |
6db615c1 | 3685 | return strjoin("/dev/disk/by-", by, "/", t, NULL); |
383182b5 | 3686 | } |
e23a0ce8 | 3687 | |
383182b5 | 3688 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3689 | assert(p); |
3690 | ||
383182b5 DR |
3691 | if (startswith(p, "LABEL=")) |
3692 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3693 | |
383182b5 DR |
3694 | if (startswith(p, "UUID=")) |
3695 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3696 | |
84cc2abf DR |
3697 | if (startswith(p, "PARTUUID=")) |
3698 | return tag_to_udev_node(p+9, "partuuid"); | |
3699 | ||
3700 | if (startswith(p, "PARTLABEL=")) | |
3701 | return tag_to_udev_node(p+10, "partlabel"); | |
3702 | ||
e23a0ce8 LP |
3703 | return strdup(p); |
3704 | } | |
3705 | ||
f212ac12 LP |
3706 | bool tty_is_vc(const char *tty) { |
3707 | assert(tty); | |
3708 | ||
98a28fef LP |
3709 | return vtnr_from_tty(tty) >= 0; |
3710 | } | |
3711 | ||
d1122ad5 LP |
3712 | bool tty_is_console(const char *tty) { |
3713 | assert(tty); | |
3714 | ||
3715 | if (startswith(tty, "/dev/")) | |
3716 | tty += 5; | |
3717 | ||
3718 | return streq(tty, "console"); | |
3719 | } | |
3720 | ||
98a28fef LP |
3721 | int vtnr_from_tty(const char *tty) { |
3722 | int i, r; | |
3723 | ||
3724 | assert(tty); | |
3725 | ||
3726 | if (startswith(tty, "/dev/")) | |
3727 | tty += 5; | |
3728 | ||
3729 | if (!startswith(tty, "tty") ) | |
3730 | return -EINVAL; | |
3731 | ||
3732 | if (tty[3] < '0' || tty[3] > '9') | |
3733 | return -EINVAL; | |
3734 | ||
3735 | r = safe_atoi(tty+3, &i); | |
3736 | if (r < 0) | |
3737 | return r; | |
3738 | ||
3739 | if (i < 0 || i > 63) | |
3740 | return -EINVAL; | |
3741 | ||
3742 | return i; | |
f212ac12 LP |
3743 | } |
3744 | ||
21baf21a MS |
3745 | char *resolve_dev_console(char **active) { |
3746 | char *tty; | |
3747 | ||
3748 | /* Resolve where /dev/console is pointing to, if /sys is actually ours | |
3749 | * (i.e. not read-only-mounted which is a sign for container setups) */ | |
3750 | ||
3751 | if (path_is_read_only_fs("/sys") > 0) | |
3752 | return NULL; | |
3753 | ||
3754 | if (read_one_line_file("/sys/class/tty/console/active", active) < 0) | |
3755 | return NULL; | |
3756 | ||
3757 | /* If multiple log outputs are configured the last one is what | |
3758 | * /dev/console points to */ | |
3759 | tty = strrchr(*active, ' '); | |
3760 | if (tty) | |
3761 | tty++; | |
3762 | else | |
3763 | tty = *active; | |
3764 | ||
8aa5429a OB |
3765 | if (streq(tty, "tty0")) { |
3766 | char *tmp; | |
3767 | ||
3768 | /* Get the active VC (e.g. tty1) */ | |
3769 | if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) { | |
3770 | free(*active); | |
3771 | tty = *active = tmp; | |
3772 | } | |
3773 | } | |
3774 | ||
21baf21a MS |
3775 | return tty; |
3776 | } | |
3777 | ||
3043935f | 3778 | bool tty_is_vc_resolve(const char *tty) { |
9588bc32 | 3779 | _cleanup_free_ char *active = NULL; |
3030ccd7 | 3780 | |
e3aa71c3 LP |
3781 | assert(tty); |
3782 | ||
3783 | if (startswith(tty, "/dev/")) | |
3784 | tty += 5; | |
3785 | ||
21baf21a MS |
3786 | if (streq(tty, "console")) { |
3787 | tty = resolve_dev_console(&active); | |
3788 | if (!tty) | |
3789 | return false; | |
3790 | } | |
3030ccd7 | 3791 | |
9588bc32 | 3792 | return tty_is_vc(tty); |
3043935f LP |
3793 | } |
3794 | ||
3795 | const char *default_term_for_tty(const char *tty) { | |
3796 | assert(tty); | |
3797 | ||
acda6a05 | 3798 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3799 | } |
3800 | ||
87d2c1ff | 3801 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3802 | assert(de); |
3803 | ||
3804 | if (ignore_file(de->d_name)) | |
3805 | return false; | |
3806 | ||
3807 | if (de->d_type != DT_REG && | |
3808 | de->d_type != DT_LNK && | |
3809 | de->d_type != DT_UNKNOWN) | |
3810 | return false; | |
3811 | ||
3812 | return true; | |
3813 | } | |
3814 | ||
87d2c1ff LP |
3815 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3816 | assert(de); | |
3817 | ||
a228a22f LP |
3818 | if (de->d_type != DT_REG && |
3819 | de->d_type != DT_LNK && | |
3820 | de->d_type != DT_UNKNOWN) | |
3821 | return false; | |
3822 | ||
3823 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3824 | return false; |
3825 | ||
3826 | return endswith(de->d_name, suffix); | |
3827 | } | |
3828 | ||
e2680723 | 3829 | void execute_directory(const char *directory, DIR *d, usec_t timeout, char *argv[]) { |
aa62a893 LP |
3830 | pid_t executor_pid; |
3831 | int r; | |
83cc030f LP |
3832 | |
3833 | assert(directory); | |
3834 | ||
aa62a893 LP |
3835 | /* Executes all binaries in a directory in parallel and waits |
3836 | * for them to finish. Optionally a timeout is applied. */ | |
83cc030f | 3837 | |
aa62a893 LP |
3838 | executor_pid = fork(); |
3839 | if (executor_pid < 0) { | |
3840 | log_error("Failed to fork: %m"); | |
3841 | return; | |
83cc030f | 3842 | |
aa62a893 LP |
3843 | } else if (executor_pid == 0) { |
3844 | _cleanup_hashmap_free_free_ Hashmap *pids = NULL; | |
3845 | _cleanup_closedir_ DIR *_d = NULL; | |
3846 | struct dirent *de; | |
3847 | sigset_t ss; | |
83cc030f | 3848 | |
aa62a893 LP |
3849 | /* We fork this all off from a child process so that |
3850 | * we can somewhat cleanly make use of SIGALRM to set | |
3851 | * a time limit */ | |
83cc030f | 3852 | |
aa62a893 | 3853 | reset_all_signal_handlers(); |
83cc030f | 3854 | |
aa62a893 LP |
3855 | assert_se(sigemptyset(&ss) == 0); |
3856 | assert_se(sigprocmask(SIG_SETMASK, &ss, NULL) == 0); | |
83cc030f | 3857 | |
aa62a893 | 3858 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 3859 | |
aa62a893 LP |
3860 | if (!d) { |
3861 | d = _d = opendir(directory); | |
3862 | if (!d) { | |
3863 | if (errno == ENOENT) | |
3864 | _exit(EXIT_SUCCESS); | |
83cc030f | 3865 | |
aa62a893 LP |
3866 | log_error("Failed to enumerate directory %s: %m", directory); |
3867 | _exit(EXIT_FAILURE); | |
3868 | } | |
83cc030f LP |
3869 | } |
3870 | ||
aa62a893 LP |
3871 | pids = hashmap_new(NULL, NULL); |
3872 | if (!pids) { | |
3873 | log_oom(); | |
3874 | _exit(EXIT_FAILURE); | |
83cc030f LP |
3875 | } |
3876 | ||
aa62a893 LP |
3877 | FOREACH_DIRENT(de, d, break) { |
3878 | _cleanup_free_ char *path = NULL; | |
3879 | pid_t pid; | |
83cc030f | 3880 | |
aa62a893 LP |
3881 | if (!dirent_is_file(de)) |
3882 | continue; | |
83cc030f | 3883 | |
418b9be5 LP |
3884 | path = strjoin(directory, "/", de->d_name, NULL); |
3885 | if (!path) { | |
aa62a893 LP |
3886 | log_oom(); |
3887 | _exit(EXIT_FAILURE); | |
3888 | } | |
83cc030f | 3889 | |
aa62a893 LP |
3890 | pid = fork(); |
3891 | if (pid < 0) { | |
3892 | log_error("Failed to fork: %m"); | |
3893 | continue; | |
3894 | } else if (pid == 0) { | |
3895 | char *_argv[2]; | |
83cc030f | 3896 | |
aa62a893 | 3897 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 3898 | |
aa62a893 LP |
3899 | if (!argv) { |
3900 | _argv[0] = path; | |
3901 | _argv[1] = NULL; | |
3902 | argv = _argv; | |
3903 | } else | |
3904 | argv[0] = path; | |
83cc030f | 3905 | |
aa62a893 LP |
3906 | execv(path, argv); |
3907 | log_error("Failed to execute %s: %m", path); | |
3908 | _exit(EXIT_FAILURE); | |
3909 | } | |
83cc030f | 3910 | |
83cc030f | 3911 | |
aa62a893 | 3912 | log_debug("Spawned %s as " PID_FMT ".", path, pid); |
83cc030f | 3913 | |
aa62a893 LP |
3914 | r = hashmap_put(pids, UINT_TO_PTR(pid), path); |
3915 | if (r < 0) { | |
3916 | log_oom(); | |
3917 | _exit(EXIT_FAILURE); | |
3918 | } | |
3919 | ||
3920 | path = NULL; | |
83cc030f LP |
3921 | } |
3922 | ||
aa62a893 LP |
3923 | /* Abort execution of this process after the |
3924 | * timout. We simply rely on SIGALRM as default action | |
3925 | * terminating the process, and turn on alarm(). */ | |
3926 | ||
3a43da28 | 3927 | if (timeout != USEC_INFINITY) |
aa62a893 LP |
3928 | alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC); |
3929 | ||
3930 | while (!hashmap_isempty(pids)) { | |
3931 | _cleanup_free_ char *path = NULL; | |
3932 | pid_t pid; | |
3933 | ||
3934 | pid = PTR_TO_UINT(hashmap_first_key(pids)); | |
3935 | assert(pid > 0); | |
83cc030f | 3936 | |
aa62a893 LP |
3937 | path = hashmap_remove(pids, UINT_TO_PTR(pid)); |
3938 | assert(path); | |
3939 | ||
3940 | wait_for_terminate_and_warn(path, pid); | |
83cc030f | 3941 | } |
83cc030f | 3942 | |
aa62a893 LP |
3943 | _exit(EXIT_SUCCESS); |
3944 | } | |
83cc030f | 3945 | |
aa62a893 | 3946 | wait_for_terminate_and_warn(directory, executor_pid); |
83cc030f LP |
3947 | } |
3948 | ||
430c18ed LP |
3949 | int kill_and_sigcont(pid_t pid, int sig) { |
3950 | int r; | |
3951 | ||
3952 | r = kill(pid, sig) < 0 ? -errno : 0; | |
3953 | ||
3954 | if (r >= 0) | |
3955 | kill(pid, SIGCONT); | |
3956 | ||
3957 | return r; | |
3958 | } | |
3959 | ||
05feefe0 LP |
3960 | bool nulstr_contains(const char*nulstr, const char *needle) { |
3961 | const char *i; | |
3962 | ||
3963 | if (!nulstr) | |
3964 | return false; | |
3965 | ||
3966 | NULSTR_FOREACH(i, nulstr) | |
3967 | if (streq(i, needle)) | |
3968 | return true; | |
3969 | ||
3970 | return false; | |
3971 | } | |
3972 | ||
6faa1114 | 3973 | bool plymouth_running(void) { |
9408a2d2 | 3974 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
3975 | } |
3976 | ||
9beb3f4d LP |
3977 | char* strshorten(char *s, size_t l) { |
3978 | assert(s); | |
3979 | ||
3980 | if (l < strlen(s)) | |
3981 | s[l] = 0; | |
3982 | ||
3983 | return s; | |
3984 | } | |
3985 | ||
3986 | static bool hostname_valid_char(char c) { | |
3987 | return | |
3988 | (c >= 'a' && c <= 'z') || | |
3989 | (c >= 'A' && c <= 'Z') || | |
3990 | (c >= '0' && c <= '9') || | |
3991 | c == '-' || | |
3992 | c == '_' || | |
3993 | c == '.'; | |
3994 | } | |
3995 | ||
3996 | bool hostname_is_valid(const char *s) { | |
3997 | const char *p; | |
aa3c5cf8 | 3998 | bool dot; |
9beb3f4d LP |
3999 | |
4000 | if (isempty(s)) | |
4001 | return false; | |
4002 | ||
aa3c5cf8 LP |
4003 | for (p = s, dot = true; *p; p++) { |
4004 | if (*p == '.') { | |
4005 | if (dot) | |
4006 | return false; | |
4007 | ||
4008 | dot = true; | |
4009 | } else { | |
4010 | if (!hostname_valid_char(*p)) | |
4011 | return false; | |
4012 | ||
4013 | dot = false; | |
4014 | } | |
4015 | } | |
4016 | ||
4017 | if (dot) | |
4018 | return false; | |
9beb3f4d LP |
4019 | |
4020 | if (p-s > HOST_NAME_MAX) | |
4021 | return false; | |
4022 | ||
4023 | return true; | |
4024 | } | |
4025 | ||
e724b063 | 4026 | char* hostname_cleanup(char *s, bool lowercase) { |
9beb3f4d | 4027 | char *p, *d; |
cec4ead9 LP |
4028 | bool dot; |
4029 | ||
4030 | for (p = s, d = s, dot = true; *p; p++) { | |
4031 | if (*p == '.') { | |
e724b063 | 4032 | if (dot) |
cec4ead9 | 4033 | continue; |
9beb3f4d | 4034 | |
e724b063 | 4035 | *(d++) = '.'; |
cec4ead9 | 4036 | dot = true; |
e724b063 LP |
4037 | } else if (hostname_valid_char(*p)) { |
4038 | *(d++) = lowercase ? tolower(*p) : *p; | |
cec4ead9 | 4039 | dot = false; |
e724b063 | 4040 | } |
cec4ead9 | 4041 | |
cec4ead9 | 4042 | } |
9beb3f4d | 4043 | |
e724b063 LP |
4044 | if (dot && d > s) |
4045 | d[-1] = 0; | |
4046 | else | |
4047 | *d = 0; | |
4048 | ||
9beb3f4d | 4049 | strshorten(s, HOST_NAME_MAX); |
cec4ead9 | 4050 | |
9beb3f4d LP |
4051 | return s; |
4052 | } | |
4053 | ||
7f0d207d LP |
4054 | bool machine_name_is_valid(const char *s) { |
4055 | ||
4056 | if (!hostname_is_valid(s)) | |
4057 | return false; | |
4058 | ||
4059 | /* Machine names should be useful hostnames, but also be | |
4060 | * useful in unit names, hence we enforce a stricter length | |
4061 | * limitation. */ | |
4062 | ||
4063 | if (strlen(s) > 64) | |
4064 | return false; | |
4065 | ||
4066 | return true; | |
4067 | } | |
4068 | ||
1325aa42 | 4069 | int pipe_eof(int fd) { |
b92bea5d ZJS |
4070 | struct pollfd pollfd = { |
4071 | .fd = fd, | |
4072 | .events = POLLIN|POLLHUP, | |
4073 | }; | |
1325aa42 | 4074 | |
d37a91e8 LP |
4075 | int r; |
4076 | ||
1325aa42 LP |
4077 | r = poll(&pollfd, 1, 0); |
4078 | if (r < 0) | |
4079 | return -errno; | |
4080 | ||
4081 | if (r == 0) | |
4082 | return 0; | |
4083 | ||
4084 | return pollfd.revents & POLLHUP; | |
4085 | } | |
4086 | ||
8f2d43a0 | 4087 | int fd_wait_for_event(int fd, int event, usec_t t) { |
968d3d24 | 4088 | |
b92bea5d ZJS |
4089 | struct pollfd pollfd = { |
4090 | .fd = fd, | |
4091 | .events = event, | |
4092 | }; | |
df50185b | 4093 | |
968d3d24 LP |
4094 | struct timespec ts; |
4095 | int r; | |
4096 | ||
3a43da28 | 4097 | r = ppoll(&pollfd, 1, t == USEC_INFINITY ? NULL : timespec_store(&ts, t), NULL); |
df50185b LP |
4098 | if (r < 0) |
4099 | return -errno; | |
4100 | ||
4101 | if (r == 0) | |
4102 | return 0; | |
4103 | ||
4104 | return pollfd.revents; | |
4105 | } | |
4106 | ||
5a3ab509 LP |
4107 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4108 | FILE *f; | |
4109 | char *t; | |
5a3ab509 LP |
4110 | int fd; |
4111 | ||
4112 | assert(path); | |
4113 | assert(_f); | |
4114 | assert(_temp_path); | |
4115 | ||
2e78fa79 | 4116 | t = tempfn_xxxxxx(path); |
5a3ab509 LP |
4117 | if (!t) |
4118 | return -ENOMEM; | |
4119 | ||
2d5bdf5b | 4120 | fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC); |
5a3ab509 LP |
4121 | if (fd < 0) { |
4122 | free(t); | |
4123 | return -errno; | |
4124 | } | |
4125 | ||
4126 | f = fdopen(fd, "we"); | |
4127 | if (!f) { | |
4128 | unlink(t); | |
4129 | free(t); | |
4130 | return -errno; | |
4131 | } | |
4132 | ||
4133 | *_f = f; | |
4134 | *_temp_path = t; | |
4135 | ||
4136 | return 0; | |
4137 | } | |
4138 | ||
6ea832a2 | 4139 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4140 | assert(fd >= 0); |
4141 | ||
6ea832a2 LP |
4142 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4143 | return -errno; | |
4144 | ||
4145 | return 0; | |
4146 | } | |
4147 | ||
4148 | int terminal_vhangup(const char *name) { | |
03e334a1 | 4149 | _cleanup_close_ int fd; |
6ea832a2 LP |
4150 | |
4151 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4152 | if (fd < 0) | |
4153 | return fd; | |
4154 | ||
03e334a1 | 4155 | return terminal_vhangup_fd(fd); |
6ea832a2 LP |
4156 | } |
4157 | ||
4158 | int vt_disallocate(const char *name) { | |
4159 | int fd, r; | |
4160 | unsigned u; | |
6ea832a2 LP |
4161 | |
4162 | /* Deallocate the VT if possible. If not possible | |
4163 | * (i.e. because it is the active one), at least clear it | |
4164 | * entirely (including the scrollback buffer) */ | |
4165 | ||
b83bc4e9 LP |
4166 | if (!startswith(name, "/dev/")) |
4167 | return -EINVAL; | |
4168 | ||
4169 | if (!tty_is_vc(name)) { | |
4170 | /* So this is not a VT. I guess we cannot deallocate | |
4171 | * it then. But let's at least clear the screen */ | |
4172 | ||
4173 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4174 | if (fd < 0) | |
4175 | return fd; | |
4176 | ||
8585357a LP |
4177 | loop_write(fd, |
4178 | "\033[r" /* clear scrolling region */ | |
4179 | "\033[H" /* move home */ | |
4180 | "\033[2J", /* clear screen */ | |
4181 | 10, false); | |
03e334a1 | 4182 | safe_close(fd); |
b83bc4e9 LP |
4183 | |
4184 | return 0; | |
4185 | } | |
6ea832a2 LP |
4186 | |
4187 | if (!startswith(name, "/dev/tty")) | |
4188 | return -EINVAL; | |
4189 | ||
4190 | r = safe_atou(name+8, &u); | |
4191 | if (r < 0) | |
4192 | return r; | |
4193 | ||
4194 | if (u <= 0) | |
b83bc4e9 | 4195 | return -EINVAL; |
6ea832a2 | 4196 | |
b83bc4e9 | 4197 | /* Try to deallocate */ |
6ea832a2 LP |
4198 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4199 | if (fd < 0) | |
4200 | return fd; | |
4201 | ||
4202 | r = ioctl(fd, VT_DISALLOCATE, u); | |
03e334a1 | 4203 | safe_close(fd); |
6ea832a2 | 4204 | |
b83bc4e9 LP |
4205 | if (r >= 0) |
4206 | return 0; | |
6ea832a2 | 4207 | |
b83bc4e9 | 4208 | if (errno != EBUSY) |
6ea832a2 | 4209 | return -errno; |
6ea832a2 | 4210 | |
b83bc4e9 LP |
4211 | /* Couldn't deallocate, so let's clear it fully with |
4212 | * scrollback */ | |
4213 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4214 | if (fd < 0) |
b83bc4e9 | 4215 | return fd; |
6ea832a2 | 4216 | |
8585357a LP |
4217 | loop_write(fd, |
4218 | "\033[r" /* clear scrolling region */ | |
4219 | "\033[H" /* move home */ | |
4220 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4221 | 10, false); | |
03e334a1 | 4222 | safe_close(fd); |
6ea832a2 | 4223 | |
b83bc4e9 | 4224 | return 0; |
6ea832a2 LP |
4225 | } |
4226 | ||
424a19f8 | 4227 | int symlink_atomic(const char *from, const char *to) { |
2e78fa79 | 4228 | _cleanup_free_ char *t = NULL; |
34ca941c LP |
4229 | |
4230 | assert(from); | |
4231 | assert(to); | |
4232 | ||
2e78fa79 | 4233 | t = tempfn_random(to); |
34ca941c LP |
4234 | if (!t) |
4235 | return -ENOMEM; | |
4236 | ||
424a19f8 LP |
4237 | if (symlink(from, t) < 0) |
4238 | return -errno; | |
34ca941c LP |
4239 | |
4240 | if (rename(t, to) < 0) { | |
2e78fa79 LP |
4241 | unlink_noerrno(t); |
4242 | return -errno; | |
34ca941c LP |
4243 | } |
4244 | ||
424a19f8 | 4245 | return 0; |
34ca941c LP |
4246 | } |
4247 | ||
1554afae LP |
4248 | int mknod_atomic(const char *path, mode_t mode, dev_t dev) { |
4249 | _cleanup_free_ char *t = NULL; | |
4250 | ||
4251 | assert(path); | |
4252 | ||
4253 | t = tempfn_random(path); | |
4254 | if (!t) | |
4255 | return -ENOMEM; | |
4256 | ||
4257 | if (mknod(t, mode, dev) < 0) | |
4258 | return -errno; | |
4259 | ||
4260 | if (rename(t, path) < 0) { | |
4261 | unlink_noerrno(t); | |
4262 | return -errno; | |
4263 | } | |
4264 | ||
4265 | return 0; | |
4266 | } | |
4267 | ||
4268 | int mkfifo_atomic(const char *path, mode_t mode) { | |
4269 | _cleanup_free_ char *t = NULL; | |
4270 | ||
4271 | assert(path); | |
4272 | ||
4273 | t = tempfn_random(path); | |
4274 | if (!t) | |
4275 | return -ENOMEM; | |
4276 | ||
4277 | if (mkfifo(t, mode) < 0) | |
4278 | return -errno; | |
4279 | ||
4280 | if (rename(t, path) < 0) { | |
4281 | unlink_noerrno(t); | |
4282 | return -errno; | |
4283 | } | |
4284 | ||
4285 | return 0; | |
4286 | } | |
4287 | ||
4d6d6518 LP |
4288 | bool display_is_local(const char *display) { |
4289 | assert(display); | |
4290 | ||
4291 | return | |
4292 | display[0] == ':' && | |
4293 | display[1] >= '0' && | |
4294 | display[1] <= '9'; | |
4295 | } | |
4296 | ||
4297 | int socket_from_display(const char *display, char **path) { | |
4298 | size_t k; | |
4299 | char *f, *c; | |
4300 | ||
4301 | assert(display); | |
4302 | assert(path); | |
4303 | ||
4304 | if (!display_is_local(display)) | |
4305 | return -EINVAL; | |
4306 | ||
4307 | k = strspn(display+1, "0123456789"); | |
4308 | ||
f8294e41 | 4309 | f = new(char, strlen("/tmp/.X11-unix/X") + k + 1); |
4d6d6518 LP |
4310 | if (!f) |
4311 | return -ENOMEM; | |
4312 | ||
4313 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4314 | memcpy(c, display+1, k); | |
4315 | c[k] = 0; | |
4316 | ||
4317 | *path = f; | |
4318 | ||
4319 | return 0; | |
4320 | } | |
4321 | ||
d05c5031 LP |
4322 | int get_user_creds( |
4323 | const char **username, | |
4324 | uid_t *uid, gid_t *gid, | |
4325 | const char **home, | |
4326 | const char **shell) { | |
4327 | ||
1cccf435 | 4328 | struct passwd *p; |
ddd88763 | 4329 | uid_t u; |
1cccf435 MV |
4330 | |
4331 | assert(username); | |
4332 | assert(*username); | |
1cccf435 MV |
4333 | |
4334 | /* We enforce some special rules for uid=0: in order to avoid | |
4335 | * NSS lookups for root we hardcode its data. */ | |
4336 | ||
4337 | if (streq(*username, "root") || streq(*username, "0")) { | |
4338 | *username = "root"; | |
4b67834e LP |
4339 | |
4340 | if (uid) | |
4341 | *uid = 0; | |
4342 | ||
4343 | if (gid) | |
4344 | *gid = 0; | |
4345 | ||
4346 | if (home) | |
4347 | *home = "/root"; | |
d05c5031 LP |
4348 | |
4349 | if (shell) | |
4350 | *shell = "/bin/sh"; | |
4351 | ||
1cccf435 MV |
4352 | return 0; |
4353 | } | |
4354 | ||
ddd88763 | 4355 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4356 | errno = 0; |
ddd88763 | 4357 | p = getpwuid(u); |
1cccf435 MV |
4358 | |
4359 | /* If there are multiple users with the same id, make | |
4360 | * sure to leave $USER to the configured value instead | |
4361 | * of the first occurrence in the database. However if | |
4362 | * the uid was configured by a numeric uid, then let's | |
4363 | * pick the real username from /etc/passwd. */ | |
4364 | if (p) | |
4365 | *username = p->pw_name; | |
4366 | } else { | |
4367 | errno = 0; | |
4368 | p = getpwnam(*username); | |
4369 | } | |
4370 | ||
4371 | if (!p) | |
8333c77e | 4372 | return errno > 0 ? -errno : -ESRCH; |
1cccf435 | 4373 | |
4b67834e LP |
4374 | if (uid) |
4375 | *uid = p->pw_uid; | |
4376 | ||
4377 | if (gid) | |
4378 | *gid = p->pw_gid; | |
4379 | ||
4380 | if (home) | |
4381 | *home = p->pw_dir; | |
4382 | ||
d05c5031 LP |
4383 | if (shell) |
4384 | *shell = p->pw_shell; | |
4385 | ||
4b67834e LP |
4386 | return 0; |
4387 | } | |
4388 | ||
59164be4 LP |
4389 | char* uid_to_name(uid_t uid) { |
4390 | struct passwd *p; | |
4391 | char *r; | |
4392 | ||
4393 | if (uid == 0) | |
4394 | return strdup("root"); | |
4395 | ||
4396 | p = getpwuid(uid); | |
4397 | if (p) | |
4398 | return strdup(p->pw_name); | |
4399 | ||
de0671ee | 4400 | if (asprintf(&r, UID_FMT, uid) < 0) |
59164be4 LP |
4401 | return NULL; |
4402 | ||
4403 | return r; | |
4404 | } | |
4405 | ||
4468addc LP |
4406 | char* gid_to_name(gid_t gid) { |
4407 | struct group *p; | |
4408 | char *r; | |
4409 | ||
4410 | if (gid == 0) | |
4411 | return strdup("root"); | |
4412 | ||
4413 | p = getgrgid(gid); | |
4414 | if (p) | |
4415 | return strdup(p->gr_name); | |
4416 | ||
de0671ee | 4417 | if (asprintf(&r, GID_FMT, gid) < 0) |
4468addc LP |
4418 | return NULL; |
4419 | ||
4420 | return r; | |
4421 | } | |
4422 | ||
4b67834e LP |
4423 | int get_group_creds(const char **groupname, gid_t *gid) { |
4424 | struct group *g; | |
4425 | gid_t id; | |
4426 | ||
4427 | assert(groupname); | |
4428 | ||
4429 | /* We enforce some special rules for gid=0: in order to avoid | |
4430 | * NSS lookups for root we hardcode its data. */ | |
4431 | ||
4432 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4433 | *groupname = "root"; | |
4434 | ||
4435 | if (gid) | |
4436 | *gid = 0; | |
4437 | ||
4438 | return 0; | |
4439 | } | |
4440 | ||
4441 | if (parse_gid(*groupname, &id) >= 0) { | |
4442 | errno = 0; | |
4443 | g = getgrgid(id); | |
4444 | ||
4445 | if (g) | |
4446 | *groupname = g->gr_name; | |
4447 | } else { | |
4448 | errno = 0; | |
4449 | g = getgrnam(*groupname); | |
4450 | } | |
4451 | ||
4452 | if (!g) | |
8333c77e | 4453 | return errno > 0 ? -errno : -ESRCH; |
4b67834e LP |
4454 | |
4455 | if (gid) | |
4456 | *gid = g->gr_gid; | |
4457 | ||
1cccf435 MV |
4458 | return 0; |
4459 | } | |
4460 | ||
4468addc LP |
4461 | int in_gid(gid_t gid) { |
4462 | gid_t *gids; | |
43673799 LP |
4463 | int ngroups_max, r, i; |
4464 | ||
43673799 LP |
4465 | if (getgid() == gid) |
4466 | return 1; | |
4467 | ||
4468 | if (getegid() == gid) | |
4469 | return 1; | |
4470 | ||
4471 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4472 | assert(ngroups_max > 0); | |
4473 | ||
4474 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4475 | ||
4476 | r = getgroups(ngroups_max, gids); | |
4477 | if (r < 0) | |
4478 | return -errno; | |
4479 | ||
4480 | for (i = 0; i < r; i++) | |
4481 | if (gids[i] == gid) | |
4482 | return 1; | |
4483 | ||
4484 | return 0; | |
4485 | } | |
4486 | ||
4468addc LP |
4487 | int in_group(const char *name) { |
4488 | int r; | |
4489 | gid_t gid; | |
4490 | ||
4491 | r = get_group_creds(&name, &gid); | |
4492 | if (r < 0) | |
4493 | return r; | |
4494 | ||
4495 | return in_gid(gid); | |
4496 | } | |
4497 | ||
8092a428 | 4498 | int glob_exists(const char *path) { |
7fd1b19b | 4499 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 4500 | int k; |
8092a428 LP |
4501 | |
4502 | assert(path); | |
4503 | ||
8092a428 LP |
4504 | errno = 0; |
4505 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4506 | ||
4507 | if (k == GLOB_NOMATCH) | |
8d98da3f | 4508 | return 0; |
8092a428 | 4509 | else if (k == GLOB_NOSPACE) |
8d98da3f | 4510 | return -ENOMEM; |
8092a428 | 4511 | else if (k == 0) |
8d98da3f | 4512 | return !strv_isempty(g.gl_pathv); |
8092a428 | 4513 | else |
8d98da3f ZJS |
4514 | return errno ? -errno : -EIO; |
4515 | } | |
8092a428 | 4516 | |
8d98da3f ZJS |
4517 | int glob_extend(char ***strv, const char *path) { |
4518 | _cleanup_globfree_ glob_t g = {}; | |
4519 | int k; | |
4520 | char **p; | |
4521 | ||
4522 | errno = 0; | |
a8ccacf5 | 4523 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
4524 | |
4525 | if (k == GLOB_NOMATCH) | |
4526 | return -ENOENT; | |
4527 | else if (k == GLOB_NOSPACE) | |
4528 | return -ENOMEM; | |
4529 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
4530 | return errno ? -errno : -EIO; | |
4531 | ||
4532 | STRV_FOREACH(p, g.gl_pathv) { | |
4533 | k = strv_extend(strv, *p); | |
4534 | if (k < 0) | |
4535 | break; | |
4536 | } | |
4537 | ||
4538 | return k; | |
8092a428 LP |
4539 | } |
4540 | ||
83096483 LP |
4541 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4542 | struct stat st; | |
4543 | ||
4544 | assert(d); | |
4545 | assert(de); | |
4546 | ||
4547 | if (de->d_type != DT_UNKNOWN) | |
4548 | return 0; | |
4549 | ||
4550 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4551 | return -errno; | |
4552 | ||
4553 | de->d_type = | |
4554 | S_ISREG(st.st_mode) ? DT_REG : | |
4555 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4556 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4557 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4558 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4559 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4560 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4561 | DT_UNKNOWN; | |
4562 | ||
4563 | return 0; | |
4564 | } | |
4565 | ||
034a2a52 | 4566 | int get_files_in_directory(const char *path, char ***list) { |
893fa014 ZJS |
4567 | _cleanup_closedir_ DIR *d = NULL; |
4568 | size_t bufsize = 0, n = 0; | |
4569 | _cleanup_strv_free_ char **l = NULL; | |
034a2a52 LP |
4570 | |
4571 | assert(path); | |
d60ef526 LP |
4572 | |
4573 | /* Returns all files in a directory in *list, and the number | |
4574 | * of files as return value. If list is NULL returns only the | |
893fa014 | 4575 | * number. */ |
034a2a52 LP |
4576 | |
4577 | d = opendir(path); | |
8ea913b2 LP |
4578 | if (!d) |
4579 | return -errno; | |
4580 | ||
034a2a52 | 4581 | for (;;) { |
7d5e9c0f | 4582 | struct dirent *de; |
034a2a52 | 4583 | |
3fd11280 FW |
4584 | errno = 0; |
4585 | de = readdir(d); | |
4586 | if (!de && errno != 0) | |
4587 | return -errno; | |
034a2a52 LP |
4588 | if (!de) |
4589 | break; | |
4590 | ||
4591 | dirent_ensure_type(d, de); | |
4592 | ||
4593 | if (!dirent_is_file(de)) | |
4594 | continue; | |
4595 | ||
d60ef526 | 4596 | if (list) { |
893fa014 ZJS |
4597 | /* one extra slot is needed for the terminating NULL */ |
4598 | if (!GREEDY_REALLOC(l, bufsize, n + 2)) | |
4599 | return -ENOMEM; | |
034a2a52 | 4600 | |
893fa014 ZJS |
4601 | l[n] = strdup(de->d_name); |
4602 | if (!l[n]) | |
4603 | return -ENOMEM; | |
034a2a52 | 4604 | |
893fa014 | 4605 | l[++n] = NULL; |
d60ef526 | 4606 | } else |
893fa014 | 4607 | n++; |
034a2a52 LP |
4608 | } |
4609 | ||
893fa014 ZJS |
4610 | if (list) { |
4611 | *list = l; | |
4612 | l = NULL; /* avoid freeing */ | |
4613 | } | |
034a2a52 | 4614 | |
893fa014 | 4615 | return n; |
034a2a52 LP |
4616 | } |
4617 | ||
b7def684 | 4618 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4619 | va_list ap; |
4620 | size_t l; | |
4621 | char *r, *p; | |
4622 | ||
4623 | va_start(ap, x); | |
4624 | ||
4625 | if (x) { | |
4626 | l = strlen(x); | |
4627 | ||
4628 | for (;;) { | |
4629 | const char *t; | |
040f18ea | 4630 | size_t n; |
911a4828 LP |
4631 | |
4632 | t = va_arg(ap, const char *); | |
4633 | if (!t) | |
4634 | break; | |
4635 | ||
040f18ea | 4636 | n = strlen(t); |
e98055de LN |
4637 | if (n > ((size_t) -1) - l) { |
4638 | va_end(ap); | |
040f18ea | 4639 | return NULL; |
e98055de | 4640 | } |
040f18ea LP |
4641 | |
4642 | l += n; | |
911a4828 LP |
4643 | } |
4644 | } else | |
4645 | l = 0; | |
4646 | ||
4647 | va_end(ap); | |
4648 | ||
4649 | r = new(char, l+1); | |
4650 | if (!r) | |
4651 | return NULL; | |
4652 | ||
4653 | if (x) { | |
4654 | p = stpcpy(r, x); | |
4655 | ||
4656 | va_start(ap, x); | |
4657 | ||
4658 | for (;;) { | |
4659 | const char *t; | |
4660 | ||
4661 | t = va_arg(ap, const char *); | |
4662 | if (!t) | |
4663 | break; | |
4664 | ||
4665 | p = stpcpy(p, t); | |
4666 | } | |
8ea913b2 LP |
4667 | |
4668 | va_end(ap); | |
911a4828 LP |
4669 | } else |
4670 | r[0] = 0; | |
4671 | ||
4672 | return r; | |
4673 | } | |
4674 | ||
b636465b | 4675 | bool is_main_thread(void) { |
ec202eae | 4676 | static thread_local int cached = 0; |
b636465b LP |
4677 | |
4678 | if (_unlikely_(cached == 0)) | |
4679 | cached = getpid() == gettid() ? 1 : -1; | |
4680 | ||
4681 | return cached > 0; | |
4682 | } | |
4683 | ||
94959f0f LP |
4684 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4685 | char *p, *s; | |
4686 | int r; | |
4687 | unsigned n, m; | |
4688 | ||
4689 | assert(ret); | |
4690 | ||
4691 | /* If it has a queue this is good enough for us */ | |
4692 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4693 | return -ENOMEM; | |
4694 | ||
4695 | r = access(p, F_OK); | |
4696 | free(p); | |
4697 | ||
4698 | if (r >= 0) { | |
4699 | *ret = d; | |
4700 | return 0; | |
4701 | } | |
4702 | ||
4703 | /* If it is a partition find the originating device */ | |
4704 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4705 | return -ENOMEM; | |
4706 | ||
4707 | r = access(p, F_OK); | |
4708 | free(p); | |
4709 | ||
4710 | if (r < 0) | |
4711 | return -ENOENT; | |
4712 | ||
4713 | /* Get parent dev_t */ | |
4714 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4715 | return -ENOMEM; | |
4716 | ||
4717 | r = read_one_line_file(p, &s); | |
4718 | free(p); | |
4719 | ||
4720 | if (r < 0) | |
4721 | return r; | |
4722 | ||
4723 | r = sscanf(s, "%u:%u", &m, &n); | |
4724 | free(s); | |
4725 | ||
4726 | if (r != 2) | |
4727 | return -EINVAL; | |
4728 | ||
4729 | /* Only return this if it is really good enough for us. */ | |
4730 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4731 | return -ENOMEM; | |
4732 | ||
4733 | r = access(p, F_OK); | |
4734 | free(p); | |
4735 | ||
4736 | if (r >= 0) { | |
4737 | *ret = makedev(m, n); | |
4738 | return 0; | |
4739 | } | |
4740 | ||
4741 | return -ENOENT; | |
4742 | } | |
4743 | ||
8d53b453 | 4744 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4745 | struct stat st; |
4746 | ||
4747 | assert(p); | |
4748 | ||
4749 | if (lstat(p, &st) < 0) | |
4750 | return -errno; | |
4751 | ||
4752 | return | |
8d53b453 | 4753 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4754 | (st.st_mode & S_ISVTX); |
4755 | } | |
94959f0f | 4756 | |
f41607a6 LP |
4757 | static const char *const ioprio_class_table[] = { |
4758 | [IOPRIO_CLASS_NONE] = "none", | |
4759 | [IOPRIO_CLASS_RT] = "realtime", | |
4760 | [IOPRIO_CLASS_BE] = "best-effort", | |
4761 | [IOPRIO_CLASS_IDLE] = "idle" | |
4762 | }; | |
4763 | ||
f8b69d1d | 4764 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4765 | |
4766 | static const char *const sigchld_code_table[] = { | |
4767 | [CLD_EXITED] = "exited", | |
4768 | [CLD_KILLED] = "killed", | |
4769 | [CLD_DUMPED] = "dumped", | |
4770 | [CLD_TRAPPED] = "trapped", | |
4771 | [CLD_STOPPED] = "stopped", | |
4772 | [CLD_CONTINUED] = "continued", | |
4773 | }; | |
4774 | ||
4775 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4776 | ||
4777 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4778 | [LOG_FAC(LOG_KERN)] = "kern", | |
4779 | [LOG_FAC(LOG_USER)] = "user", | |
4780 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4781 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4782 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4783 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4784 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4785 | [LOG_FAC(LOG_NEWS)] = "news", | |
4786 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4787 | [LOG_FAC(LOG_CRON)] = "cron", | |
4788 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4789 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4790 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4791 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4792 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4793 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4794 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4795 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4796 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4797 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4798 | }; | |
4799 | ||
f8b69d1d | 4800 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4801 | |
4802 | static const char *const log_level_table[] = { | |
4803 | [LOG_EMERG] = "emerg", | |
4804 | [LOG_ALERT] = "alert", | |
4805 | [LOG_CRIT] = "crit", | |
4806 | [LOG_ERR] = "err", | |
4807 | [LOG_WARNING] = "warning", | |
4808 | [LOG_NOTICE] = "notice", | |
4809 | [LOG_INFO] = "info", | |
4810 | [LOG_DEBUG] = "debug" | |
4811 | }; | |
4812 | ||
f8b69d1d | 4813 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4814 | |
4815 | static const char* const sched_policy_table[] = { | |
4816 | [SCHED_OTHER] = "other", | |
4817 | [SCHED_BATCH] = "batch", | |
4818 | [SCHED_IDLE] = "idle", | |
4819 | [SCHED_FIFO] = "fifo", | |
4820 | [SCHED_RR] = "rr" | |
4821 | }; | |
4822 | ||
f8b69d1d | 4823 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 | 4824 | |
517d56b1 | 4825 | static const char* const rlimit_table[_RLIMIT_MAX] = { |
f41607a6 LP |
4826 | [RLIMIT_CPU] = "LimitCPU", |
4827 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4828 | [RLIMIT_DATA] = "LimitDATA", | |
4829 | [RLIMIT_STACK] = "LimitSTACK", | |
4830 | [RLIMIT_CORE] = "LimitCORE", | |
4831 | [RLIMIT_RSS] = "LimitRSS", | |
4832 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4833 | [RLIMIT_AS] = "LimitAS", | |
4834 | [RLIMIT_NPROC] = "LimitNPROC", | |
4835 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4836 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4837 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4838 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4839 | [RLIMIT_NICE] = "LimitNICE", | |
4840 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4841 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4842 | }; | |
4843 | ||
4844 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4845 | ||
4846 | static const char* const ip_tos_table[] = { | |
4847 | [IPTOS_LOWDELAY] = "low-delay", | |
4848 | [IPTOS_THROUGHPUT] = "throughput", | |
4849 | [IPTOS_RELIABILITY] = "reliability", | |
4850 | [IPTOS_LOWCOST] = "low-cost", | |
4851 | }; | |
4852 | ||
f8b69d1d | 4853 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4854 | |
4e240ab0 | 4855 | static const char *const __signal_table[] = { |
f41607a6 LP |
4856 | [SIGHUP] = "HUP", |
4857 | [SIGINT] = "INT", | |
4858 | [SIGQUIT] = "QUIT", | |
4859 | [SIGILL] = "ILL", | |
4860 | [SIGTRAP] = "TRAP", | |
4861 | [SIGABRT] = "ABRT", | |
4862 | [SIGBUS] = "BUS", | |
4863 | [SIGFPE] = "FPE", | |
4864 | [SIGKILL] = "KILL", | |
4865 | [SIGUSR1] = "USR1", | |
4866 | [SIGSEGV] = "SEGV", | |
4867 | [SIGUSR2] = "USR2", | |
4868 | [SIGPIPE] = "PIPE", | |
4869 | [SIGALRM] = "ALRM", | |
4870 | [SIGTERM] = "TERM", | |
4871 | #ifdef SIGSTKFLT | |
4872 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4873 | #endif | |
4874 | [SIGCHLD] = "CHLD", | |
4875 | [SIGCONT] = "CONT", | |
4876 | [SIGSTOP] = "STOP", | |
4877 | [SIGTSTP] = "TSTP", | |
4878 | [SIGTTIN] = "TTIN", | |
4879 | [SIGTTOU] = "TTOU", | |
4880 | [SIGURG] = "URG", | |
4881 | [SIGXCPU] = "XCPU", | |
4882 | [SIGXFSZ] = "XFSZ", | |
4883 | [SIGVTALRM] = "VTALRM", | |
4884 | [SIGPROF] = "PROF", | |
4885 | [SIGWINCH] = "WINCH", | |
4886 | [SIGIO] = "IO", | |
4887 | [SIGPWR] = "PWR", | |
4888 | [SIGSYS] = "SYS" | |
4889 | }; | |
4890 | ||
4e240ab0 MS |
4891 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4892 | ||
4893 | const char *signal_to_string(int signo) { | |
ec202eae | 4894 | static thread_local char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1]; |
4e240ab0 MS |
4895 | const char *name; |
4896 | ||
4897 | name = __signal_to_string(signo); | |
4898 | if (name) | |
4899 | return name; | |
4900 | ||
4901 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
fa70beaa | 4902 | snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN); |
4e240ab0 | 4903 | else |
fa70beaa LP |
4904 | snprintf(buf, sizeof(buf), "%d", signo); |
4905 | ||
4e240ab0 MS |
4906 | return buf; |
4907 | } | |
4908 | ||
4909 | int signal_from_string(const char *s) { | |
4910 | int signo; | |
4911 | int offset = 0; | |
4912 | unsigned u; | |
4913 | ||
040f18ea | 4914 | signo = __signal_from_string(s); |
4e240ab0 MS |
4915 | if (signo > 0) |
4916 | return signo; | |
4917 | ||
4918 | if (startswith(s, "RTMIN+")) { | |
4919 | s += 6; | |
4920 | offset = SIGRTMIN; | |
4921 | } | |
4922 | if (safe_atou(s, &u) >= 0) { | |
4923 | signo = (int) u + offset; | |
4924 | if (signo > 0 && signo < _NSIG) | |
4925 | return signo; | |
4926 | } | |
4927 | return -1; | |
4928 | } | |
65457142 FC |
4929 | |
4930 | bool kexec_loaded(void) { | |
4931 | bool loaded = false; | |
4932 | char *s; | |
4933 | ||
4934 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
4935 | if (s[0] == '1') | |
4936 | loaded = true; | |
4937 | free(s); | |
4938 | } | |
4939 | return loaded; | |
4940 | } | |
fb9de93d LP |
4941 | |
4942 | int strdup_or_null(const char *a, char **b) { | |
4943 | char *c; | |
4944 | ||
4945 | assert(b); | |
4946 | ||
4947 | if (!a) { | |
4948 | *b = NULL; | |
4949 | return 0; | |
4950 | } | |
4951 | ||
4952 | c = strdup(a); | |
4953 | if (!c) | |
4954 | return -ENOMEM; | |
4955 | ||
4956 | *b = c; | |
4957 | return 0; | |
4958 | } | |
64685e0c | 4959 | |
87d2c1ff LP |
4960 | int prot_from_flags(int flags) { |
4961 | ||
4962 | switch (flags & O_ACCMODE) { | |
4963 | ||
4964 | case O_RDONLY: | |
4965 | return PROT_READ; | |
4966 | ||
4967 | case O_WRONLY: | |
4968 | return PROT_WRITE; | |
4969 | ||
4970 | case O_RDWR: | |
4971 | return PROT_READ|PROT_WRITE; | |
4972 | ||
4973 | default: | |
4974 | return -EINVAL; | |
4975 | } | |
7c99e0c1 | 4976 | } |
689b9a22 | 4977 | |
babfc091 | 4978 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 4979 | unsigned i; |
babfc091 LP |
4980 | |
4981 | static const struct { | |
4982 | const char *suffix; | |
4983 | off_t factor; | |
4984 | } table[] = { | |
32895bb3 LP |
4985 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
4986 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
4987 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
4988 | { "G", 1024ULL*1024ULL*1024ULL }, | |
4989 | { "M", 1024ULL*1024ULL }, | |
4990 | { "K", 1024ULL }, | |
4991 | }; | |
4992 | ||
4993 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
4994 | ||
4995 | if (t >= table[i].factor) { | |
4996 | snprintf(buf, l, | |
4997 | "%llu.%llu%s", | |
4998 | (unsigned long long) (t / table[i].factor), | |
4999 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
5000 | table[i].suffix); | |
5001 | ||
5002 | goto finish; | |
5003 | } | |
5004 | } | |
5005 | ||
5006 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
5007 | ||
5008 | finish: | |
5009 | buf[l-1] = 0; | |
5010 | return buf; | |
5011 | ||
5012 | } | |
55d7bfc1 LP |
5013 | |
5014 | void* memdup(const void *p, size_t l) { | |
5015 | void *r; | |
5016 | ||
5017 | assert(p); | |
5018 | ||
5019 | r = malloc(l); | |
5020 | if (!r) | |
5021 | return NULL; | |
5022 | ||
5023 | memcpy(r, p, l); | |
5024 | return r; | |
5025 | } | |
bb99a35a LP |
5026 | |
5027 | int fd_inc_sndbuf(int fd, size_t n) { | |
5028 | int r, value; | |
5029 | socklen_t l = sizeof(value); | |
5030 | ||
5031 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
92d75ca4 | 5032 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
5033 | return 0; |
5034 | ||
92d75ca4 LP |
5035 | /* If we have the privileges we will ignore the kernel limit. */ |
5036 | ||
bb99a35a | 5037 | value = (int) n; |
92d75ca4 LP |
5038 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) |
5039 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) | |
5040 | return -errno; | |
bb99a35a LP |
5041 | |
5042 | return 1; | |
5043 | } | |
5044 | ||
5045 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5046 | int r, value; | |
5047 | socklen_t l = sizeof(value); | |
5048 | ||
5049 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
92d75ca4 | 5050 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
5051 | return 0; |
5052 | ||
92d75ca4 | 5053 | /* If we have the privileges we will ignore the kernel limit. */ |
bb99a35a | 5054 | |
92d75ca4 LP |
5055 | value = (int) n; |
5056 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) | |
5057 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) | |
5058 | return -errno; | |
bb99a35a LP |
5059 | return 1; |
5060 | } | |
6bb92a16 | 5061 | |
9bdc770c | 5062 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
5063 | pid_t parent_pid, agent_pid; |
5064 | int fd; | |
5065 | bool stdout_is_tty, stderr_is_tty; | |
5066 | unsigned n, i; | |
5067 | va_list ap; | |
5068 | char **l; | |
5069 | ||
5070 | assert(pid); | |
5071 | assert(path); | |
5072 | ||
5073 | parent_pid = getpid(); | |
5074 | ||
5075 | /* Spawns a temporary TTY agent, making sure it goes away when | |
5076 | * we go away */ | |
5077 | ||
5078 | agent_pid = fork(); | |
5079 | if (agent_pid < 0) | |
5080 | return -errno; | |
5081 | ||
5082 | if (agent_pid != 0) { | |
5083 | *pid = agent_pid; | |
5084 | return 0; | |
5085 | } | |
5086 | ||
5087 | /* In the child: | |
5088 | * | |
5089 | * Make sure the agent goes away when the parent dies */ | |
5090 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5091 | _exit(EXIT_FAILURE); | |
5092 | ||
5093 | /* Check whether our parent died before we were able | |
5094 | * to set the death signal */ | |
5095 | if (getppid() != parent_pid) | |
5096 | _exit(EXIT_SUCCESS); | |
5097 | ||
5098 | /* Don't leak fds to the agent */ | |
9bdc770c | 5099 | close_all_fds(except, n_except); |
6bb92a16 LP |
5100 | |
5101 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5102 | stderr_is_tty = isatty(STDERR_FILENO); | |
5103 | ||
5104 | if (!stdout_is_tty || !stderr_is_tty) { | |
5105 | /* Detach from stdout/stderr. and reopen | |
5106 | * /dev/tty for them. This is important to | |
5107 | * ensure that when systemctl is started via | |
5108 | * popen() or a similar call that expects to | |
5109 | * read EOF we actually do generate EOF and | |
5110 | * not delay this indefinitely by because we | |
5111 | * keep an unused copy of stdin around. */ | |
5112 | fd = open("/dev/tty", O_WRONLY); | |
5113 | if (fd < 0) { | |
5114 | log_error("Failed to open /dev/tty: %m"); | |
5115 | _exit(EXIT_FAILURE); | |
5116 | } | |
5117 | ||
5118 | if (!stdout_is_tty) | |
5119 | dup2(fd, STDOUT_FILENO); | |
5120 | ||
5121 | if (!stderr_is_tty) | |
5122 | dup2(fd, STDERR_FILENO); | |
5123 | ||
5124 | if (fd > 2) | |
5125 | close(fd); | |
5126 | } | |
5127 | ||
5128 | /* Count arguments */ | |
5129 | va_start(ap, path); | |
5130 | for (n = 0; va_arg(ap, char*); n++) | |
5131 | ; | |
5132 | va_end(ap); | |
5133 | ||
5134 | /* Allocate strv */ | |
5135 | l = alloca(sizeof(char *) * (n + 1)); | |
5136 | ||
5137 | /* Fill in arguments */ | |
5138 | va_start(ap, path); | |
5139 | for (i = 0; i <= n; i++) | |
5140 | l[i] = va_arg(ap, char*); | |
5141 | va_end(ap); | |
5142 | ||
5143 | execv(path, l); | |
5144 | _exit(EXIT_FAILURE); | |
5145 | } | |
68faf98c LP |
5146 | |
5147 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5148 | struct rlimit highest, fixed; | |
5149 | ||
5150 | assert(rlim); | |
5151 | ||
5152 | if (setrlimit(resource, rlim) >= 0) | |
5153 | return 0; | |
5154 | ||
5155 | if (errno != EPERM) | |
5156 | return -errno; | |
5157 | ||
5158 | /* So we failed to set the desired setrlimit, then let's try | |
5159 | * to get as close as we can */ | |
5160 | assert_se(getrlimit(resource, &highest) == 0); | |
5161 | ||
5162 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5163 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5164 | ||
5165 | if (setrlimit(resource, &fixed) < 0) | |
5166 | return -errno; | |
5167 | ||
5168 | return 0; | |
5169 | } | |
3d9a4122 | 5170 | |
ab94af92 | 5171 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
49aa47c7 LP |
5172 | _cleanup_fclose_ FILE *f = NULL; |
5173 | char *value = NULL; | |
ab94af92 | 5174 | int r; |
ab94af92 LP |
5175 | bool done = false; |
5176 | size_t l; | |
49aa47c7 | 5177 | const char *path; |
ab94af92 | 5178 | |
49aa47c7 | 5179 | assert(pid >= 0); |
ab94af92 LP |
5180 | assert(field); |
5181 | assert(_value); | |
5182 | ||
b68fa010 | 5183 | path = procfs_file_alloca(pid, "environ"); |
ab94af92 LP |
5184 | |
5185 | f = fopen(path, "re"); | |
5186 | if (!f) | |
5187 | return -errno; | |
5188 | ||
5189 | l = strlen(field); | |
5190 | r = 0; | |
5191 | ||
5192 | do { | |
5193 | char line[LINE_MAX]; | |
5194 | unsigned i; | |
5195 | ||
5196 | for (i = 0; i < sizeof(line)-1; i++) { | |
5197 | int c; | |
5198 | ||
5199 | c = getc(f); | |
5200 | if (_unlikely_(c == EOF)) { | |
5201 | done = true; | |
5202 | break; | |
5203 | } else if (c == 0) | |
5204 | break; | |
5205 | ||
5206 | line[i] = c; | |
5207 | } | |
5208 | line[i] = 0; | |
5209 | ||
5210 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5211 | value = strdup(line + l + 1); | |
49aa47c7 LP |
5212 | if (!value) |
5213 | return -ENOMEM; | |
ab94af92 LP |
5214 | |
5215 | r = 1; | |
5216 | break; | |
5217 | } | |
5218 | ||
5219 | } while (!done); | |
5220 | ||
49aa47c7 | 5221 | *_value = value; |
ab94af92 LP |
5222 | return r; |
5223 | } | |
d889a206 | 5224 | |
49dbfa7b LP |
5225 | bool is_valid_documentation_url(const char *url) { |
5226 | assert(url); | |
5227 | ||
5228 | if (startswith(url, "http://") && url[7]) | |
5229 | return true; | |
5230 | ||
5231 | if (startswith(url, "https://") && url[8]) | |
5232 | return true; | |
5233 | ||
5234 | if (startswith(url, "file:") && url[5]) | |
5235 | return true; | |
5236 | ||
5237 | if (startswith(url, "info:") && url[5]) | |
5238 | return true; | |
5239 | ||
5240 | if (startswith(url, "man:") && url[4]) | |
5241 | return true; | |
5242 | ||
5243 | return false; | |
5244 | } | |
9be346c9 HH |
5245 | |
5246 | bool in_initrd(void) { | |
73020ab2 | 5247 | static int saved = -1; |
825c6fe5 | 5248 | struct statfs s; |
8f33b5b8 | 5249 | |
825c6fe5 LP |
5250 | if (saved >= 0) |
5251 | return saved; | |
5252 | ||
5253 | /* We make two checks here: | |
5254 | * | |
5255 | * 1. the flag file /etc/initrd-release must exist | |
5256 | * 2. the root file system must be a memory file system | |
5257 | * | |
5258 | * The second check is extra paranoia, since misdetecting an | |
5259 | * initrd can have bad bad consequences due the initrd | |
5260 | * emptying when transititioning to the main systemd. | |
5261 | */ | |
5262 | ||
5263 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5264 | statfs("/", &s) >= 0 && | |
943aad8c | 5265 | is_temporary_fs(&s); |
9be346c9 | 5266 | |
8f33b5b8 | 5267 | return saved; |
9be346c9 | 5268 | } |
069cfc85 LP |
5269 | |
5270 | void warn_melody(void) { | |
e67f47e5 | 5271 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5272 | |
5273 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5274 | if (fd < 0) | |
5275 | return; | |
5276 | ||
040f18ea | 5277 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5278 | |
5279 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5280 | usleep(125*USEC_PER_MSEC); | |
5281 | ||
5282 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5283 | usleep(125*USEC_PER_MSEC); | |
5284 | ||
5285 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5286 | usleep(125*USEC_PER_MSEC); | |
5287 | ||
5288 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5289 | } |
cd3bd60a LP |
5290 | |
5291 | int make_console_stdio(void) { | |
5292 | int fd, r; | |
5293 | ||
5294 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5295 | ||
3a43da28 | 5296 | fd = acquire_terminal("/dev/console", false, true, true, USEC_INFINITY); |
cd3bd60a LP |
5297 | if (fd < 0) { |
5298 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5299 | return fd; | |
5300 | } | |
5301 | ||
5302 | r = make_stdio(fd); | |
5303 | if (r < 0) { | |
5304 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5305 | return r; | |
5306 | } | |
5307 | ||
5308 | return 0; | |
5309 | } | |
7c5f152a LP |
5310 | |
5311 | int get_home_dir(char **_h) { | |
2cfbd749 | 5312 | struct passwd *p; |
7c5f152a | 5313 | const char *e; |
2cfbd749 | 5314 | char *h; |
7c5f152a | 5315 | uid_t u; |
7c5f152a LP |
5316 | |
5317 | assert(_h); | |
5318 | ||
5319 | /* Take the user specified one */ | |
9a00f57a LP |
5320 | e = secure_getenv("HOME"); |
5321 | if (e && path_is_absolute(e)) { | |
7c5f152a LP |
5322 | h = strdup(e); |
5323 | if (!h) | |
5324 | return -ENOMEM; | |
5325 | ||
5326 | *_h = h; | |
5327 | return 0; | |
5328 | } | |
5329 | ||
5330 | /* Hardcode home directory for root to avoid NSS */ | |
5331 | u = getuid(); | |
5332 | if (u == 0) { | |
5333 | h = strdup("/root"); | |
5334 | if (!h) | |
5335 | return -ENOMEM; | |
5336 | ||
5337 | *_h = h; | |
5338 | return 0; | |
5339 | } | |
5340 | ||
5341 | /* Check the database... */ | |
5342 | errno = 0; | |
5343 | p = getpwuid(u); | |
5344 | if (!p) | |
bcb161b0 | 5345 | return errno > 0 ? -errno : -ESRCH; |
7c5f152a LP |
5346 | |
5347 | if (!path_is_absolute(p->pw_dir)) | |
5348 | return -EINVAL; | |
5349 | ||
5350 | h = strdup(p->pw_dir); | |
5351 | if (!h) | |
5352 | return -ENOMEM; | |
5353 | ||
5354 | *_h = h; | |
5355 | return 0; | |
5356 | } | |
5357 | ||
2cfbd749 LP |
5358 | int get_shell(char **_s) { |
5359 | struct passwd *p; | |
5360 | const char *e; | |
5361 | char *s; | |
5362 | uid_t u; | |
5363 | ||
5364 | assert(_s); | |
5365 | ||
5366 | /* Take the user specified one */ | |
5367 | e = getenv("SHELL"); | |
5368 | if (e) { | |
5369 | s = strdup(e); | |
5370 | if (!s) | |
5371 | return -ENOMEM; | |
5372 | ||
5373 | *_s = s; | |
5374 | return 0; | |
5375 | } | |
5376 | ||
5377 | /* Hardcode home directory for root to avoid NSS */ | |
5378 | u = getuid(); | |
5379 | if (u == 0) { | |
5380 | s = strdup("/bin/sh"); | |
5381 | if (!s) | |
5382 | return -ENOMEM; | |
5383 | ||
5384 | *_s = s; | |
5385 | return 0; | |
5386 | } | |
5387 | ||
5388 | /* Check the database... */ | |
5389 | errno = 0; | |
5390 | p = getpwuid(u); | |
5391 | if (!p) | |
5392 | return errno > 0 ? -errno : -ESRCH; | |
5393 | ||
5394 | if (!path_is_absolute(p->pw_shell)) | |
5395 | return -EINVAL; | |
5396 | ||
5397 | s = strdup(p->pw_shell); | |
5398 | if (!s) | |
5399 | return -ENOMEM; | |
5400 | ||
5401 | *_s = s; | |
5402 | return 0; | |
5403 | } | |
5404 | ||
0b507b17 LP |
5405 | bool filename_is_safe(const char *p) { |
5406 | ||
5407 | if (isempty(p)) | |
5408 | return false; | |
5409 | ||
5410 | if (strchr(p, '/')) | |
5411 | return false; | |
5412 | ||
5413 | if (streq(p, ".")) | |
5414 | return false; | |
5415 | ||
5416 | if (streq(p, "..")) | |
5417 | return false; | |
5418 | ||
5419 | if (strlen(p) > FILENAME_MAX) | |
5420 | return false; | |
5421 | ||
5422 | return true; | |
5423 | } | |
5424 | ||
5425 | bool string_is_safe(const char *p) { | |
5426 | const char *t; | |
5427 | ||
6294aa76 LP |
5428 | if (!p) |
5429 | return false; | |
0b507b17 LP |
5430 | |
5431 | for (t = p; *t; t++) { | |
01539d6e | 5432 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5433 | return false; |
5434 | ||
6294aa76 | 5435 | if (strchr("\\\"\'\0x7f", *t)) |
0b507b17 LP |
5436 | return false; |
5437 | } | |
5438 | ||
5439 | return true; | |
5440 | } | |
cfbc22ab | 5441 | |
ac4c8d6d | 5442 | /** |
6294aa76 LP |
5443 | * Check if a string contains control characters. If 'ok' is non-NULL |
5444 | * it may be a string containing additional CCs to be considered OK. | |
ac4c8d6d | 5445 | */ |
6294aa76 | 5446 | bool string_has_cc(const char *p, const char *ok) { |
4d1a6904 LP |
5447 | const char *t; |
5448 | ||
5449 | assert(p); | |
5450 | ||
3a8a9163 | 5451 | for (t = p; *t; t++) { |
6294aa76 | 5452 | if (ok && strchr(ok, *t)) |
1cb1767a | 5453 | continue; |
6294aa76 LP |
5454 | |
5455 | if (*t > 0 && *t < ' ') | |
4d1a6904 LP |
5456 | return true; |
5457 | ||
3a8a9163 LP |
5458 | if (*t == 127) |
5459 | return true; | |
5460 | } | |
5461 | ||
4d1a6904 LP |
5462 | return false; |
5463 | } | |
5464 | ||
e884315e LP |
5465 | bool path_is_safe(const char *p) { |
5466 | ||
5467 | if (isempty(p)) | |
5468 | return false; | |
5469 | ||
5470 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5471 | return false; | |
5472 | ||
5473 | if (strlen(p) > PATH_MAX) | |
5474 | return false; | |
5475 | ||
5476 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5477 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5478 | return false; | |
5479 | ||
5480 | if (strstr(p, "//")) | |
5481 | return false; | |
5482 | ||
5483 | return true; | |
5484 | } | |
5485 | ||
a9e12476 KS |
5486 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5487 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5488 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5489 | size_t l, u, idx; |
5490 | const void *p; | |
5491 | int comparison; | |
5492 | ||
5493 | l = 0; | |
5494 | u = nmemb; | |
5495 | while (l < u) { | |
5496 | idx = (l + u) / 2; | |
5497 | p = (void *)(((const char *) base) + (idx * size)); | |
5498 | comparison = compar(key, p, arg); | |
5499 | if (comparison < 0) | |
5500 | u = idx; | |
5501 | else if (comparison > 0) | |
5502 | l = idx + 1; | |
5503 | else | |
5504 | return (void *)p; | |
5505 | } | |
5506 | return NULL; | |
5507 | } | |
09017585 MS |
5508 | |
5509 | bool is_locale_utf8(void) { | |
5510 | const char *set; | |
5511 | static int cached_answer = -1; | |
5512 | ||
5513 | if (cached_answer >= 0) | |
5514 | goto out; | |
5515 | ||
5516 | if (!setlocale(LC_ALL, "")) { | |
5517 | cached_answer = true; | |
5518 | goto out; | |
5519 | } | |
5520 | ||
5521 | set = nl_langinfo(CODESET); | |
5522 | if (!set) { | |
5523 | cached_answer = true; | |
5524 | goto out; | |
5525 | } | |
5526 | ||
f168c273 | 5527 | if (streq(set, "UTF-8")) { |
fee79e01 HH |
5528 | cached_answer = true; |
5529 | goto out; | |
5530 | } | |
5531 | ||
6cf2f1d9 HH |
5532 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
5533 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
5534 | set = setlocale(LC_CTYPE, NULL); |
5535 | if (!set) { | |
5536 | cached_answer = true; | |
5537 | goto out; | |
5538 | } | |
5539 | ||
6cf2f1d9 HH |
5540 | /* Check result, but ignore the result if C was set |
5541 | * explicitly. */ | |
5542 | cached_answer = | |
5543 | streq(set, "C") && | |
5544 | !getenv("LC_ALL") && | |
5545 | !getenv("LC_CTYPE") && | |
5546 | !getenv("LANG"); | |
fee79e01 | 5547 | |
09017585 | 5548 | out: |
6cf2f1d9 | 5549 | return (bool) cached_answer; |
09017585 | 5550 | } |
c339d977 MS |
5551 | |
5552 | const char *draw_special_char(DrawSpecialChar ch) { | |
5553 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
6b01f1d3 | 5554 | |
c339d977 | 5555 | /* UTF-8 */ { |
6b01f1d3 | 5556 | [DRAW_TREE_VERTICAL] = "\342\224\202 ", /* │ */ |
45a5ff0d MS |
5557 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ |
5558 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5559 | [DRAW_TREE_SPACE] = " ", /* */ |
6b01f1d3 LP |
5560 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243", /* ‣ */ |
5561 | [DRAW_BLACK_CIRCLE] = "\342\227\217", /* ● */ | |
5562 | [DRAW_ARROW] = "\342\206\222", /* → */ | |
13f8b8cb | 5563 | [DRAW_DASH] = "\342\200\223", /* – */ |
c339d977 | 5564 | }, |
6b01f1d3 | 5565 | |
c339d977 | 5566 | /* ASCII fallback */ { |
6b01f1d3 | 5567 | [DRAW_TREE_VERTICAL] = "| ", |
45a5ff0d MS |
5568 | [DRAW_TREE_BRANCH] = "|-", |
5569 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5570 | [DRAW_TREE_SPACE] = " ", |
6b01f1d3 LP |
5571 | [DRAW_TRIANGULAR_BULLET] = ">", |
5572 | [DRAW_BLACK_CIRCLE] = "*", | |
5573 | [DRAW_ARROW] = "->", | |
13f8b8cb | 5574 | [DRAW_DASH] = "-", |
c339d977 MS |
5575 | } |
5576 | }; | |
5577 | ||
5578 | return draw_table[!is_locale_utf8()][ch]; | |
5579 | } | |
409bc9c3 LP |
5580 | |
5581 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5582 | const char *f; | |
5583 | char *t, *r; | |
5584 | size_t l, old_len, new_len; | |
5585 | ||
5586 | assert(text); | |
5587 | assert(old_string); | |
5588 | assert(new_string); | |
5589 | ||
5590 | old_len = strlen(old_string); | |
5591 | new_len = strlen(new_string); | |
5592 | ||
5593 | l = strlen(text); | |
5594 | r = new(char, l+1); | |
5595 | if (!r) | |
5596 | return NULL; | |
5597 | ||
5598 | f = text; | |
5599 | t = r; | |
5600 | while (*f) { | |
5601 | char *a; | |
5602 | size_t d, nl; | |
5603 | ||
5604 | if (!startswith(f, old_string)) { | |
5605 | *(t++) = *(f++); | |
5606 | continue; | |
5607 | } | |
5608 | ||
5609 | d = t - r; | |
5610 | nl = l - old_len + new_len; | |
5611 | a = realloc(r, nl + 1); | |
5612 | if (!a) | |
5613 | goto oom; | |
5614 | ||
5615 | l = nl; | |
5616 | r = a; | |
5617 | t = r + d; | |
5618 | ||
5619 | t = stpcpy(t, new_string); | |
5620 | f += old_len; | |
5621 | } | |
5622 | ||
5623 | *t = 0; | |
5624 | return r; | |
5625 | ||
5626 | oom: | |
5627 | free(r); | |
5628 | return NULL; | |
5629 | } | |
e8bc0ea2 LP |
5630 | |
5631 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5632 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5633 | enum { |
5634 | STATE_OTHER, | |
5635 | STATE_ESCAPE, | |
5636 | STATE_BRACKET | |
5637 | } state = STATE_OTHER; | |
5638 | char *obuf = NULL; | |
5639 | size_t osz = 0, isz; | |
5640 | FILE *f; | |
5641 | ||
5642 | assert(ibuf); | |
5643 | assert(*ibuf); | |
5644 | ||
5645 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5646 | ||
5647 | isz = _isz ? *_isz : strlen(*ibuf); | |
5648 | ||
5649 | f = open_memstream(&obuf, &osz); | |
5650 | if (!f) | |
5651 | return NULL; | |
5652 | ||
5653 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5654 | ||
5655 | switch (state) { | |
5656 | ||
5657 | case STATE_OTHER: | |
5658 | if (i >= *ibuf + isz) /* EOT */ | |
5659 | break; | |
5660 | else if (*i == '\x1B') | |
5661 | state = STATE_ESCAPE; | |
5662 | else if (*i == '\t') | |
5663 | fputs(" ", f); | |
5664 | else | |
5665 | fputc(*i, f); | |
5666 | break; | |
5667 | ||
5668 | case STATE_ESCAPE: | |
5669 | if (i >= *ibuf + isz) { /* EOT */ | |
5670 | fputc('\x1B', f); | |
5671 | break; | |
5672 | } else if (*i == '[') { | |
5673 | state = STATE_BRACKET; | |
5674 | begin = i + 1; | |
5675 | } else { | |
5676 | fputc('\x1B', f); | |
5677 | fputc(*i, f); | |
5678 | state = STATE_OTHER; | |
5679 | } | |
5680 | ||
5681 | break; | |
5682 | ||
5683 | case STATE_BRACKET: | |
5684 | ||
5685 | if (i >= *ibuf + isz || /* EOT */ | |
5686 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5687 | fputc('\x1B', f); | |
5688 | fputc('[', f); | |
5689 | state = STATE_OTHER; | |
5690 | i = begin-1; | |
5691 | } else if (*i == 'm') | |
5692 | state = STATE_OTHER; | |
5693 | break; | |
5694 | } | |
5695 | } | |
5696 | ||
5697 | if (ferror(f)) { | |
5698 | fclose(f); | |
5699 | free(obuf); | |
5700 | return NULL; | |
5701 | } | |
5702 | ||
5703 | fclose(f); | |
5704 | ||
5705 | free(*ibuf); | |
5706 | *ibuf = obuf; | |
5707 | ||
5708 | if (_isz) | |
5709 | *_isz = osz; | |
5710 | ||
5711 | return obuf; | |
5712 | } | |
240dbaa4 LP |
5713 | |
5714 | int on_ac_power(void) { | |
5715 | bool found_offline = false, found_online = false; | |
5716 | _cleanup_closedir_ DIR *d = NULL; | |
5717 | ||
5718 | d = opendir("/sys/class/power_supply"); | |
5719 | if (!d) | |
5720 | return -errno; | |
5721 | ||
5722 | for (;;) { | |
5723 | struct dirent *de; | |
240dbaa4 LP |
5724 | _cleanup_close_ int fd = -1, device = -1; |
5725 | char contents[6]; | |
5726 | ssize_t n; | |
240dbaa4 | 5727 | |
3fd11280 FW |
5728 | errno = 0; |
5729 | de = readdir(d); | |
5730 | if (!de && errno != 0) | |
5731 | return -errno; | |
240dbaa4 LP |
5732 | |
5733 | if (!de) | |
5734 | break; | |
5735 | ||
5736 | if (ignore_file(de->d_name)) | |
5737 | continue; | |
5738 | ||
5739 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5740 | if (device < 0) { | |
5741 | if (errno == ENOENT || errno == ENOTDIR) | |
5742 | continue; | |
5743 | ||
5744 | return -errno; | |
5745 | } | |
5746 | ||
5747 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5748 | if (fd < 0) { | |
5749 | if (errno == ENOENT) | |
5750 | continue; | |
5751 | ||
5752 | return -errno; | |
5753 | } | |
5754 | ||
5755 | n = read(fd, contents, sizeof(contents)); | |
5756 | if (n < 0) | |
5757 | return -errno; | |
5758 | ||
5759 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5760 | continue; | |
5761 | ||
03e334a1 | 5762 | safe_close(fd); |
240dbaa4 LP |
5763 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
5764 | if (fd < 0) { | |
5765 | if (errno == ENOENT) | |
5766 | continue; | |
5767 | ||
5768 | return -errno; | |
5769 | } | |
5770 | ||
5771 | n = read(fd, contents, sizeof(contents)); | |
5772 | if (n < 0) | |
5773 | return -errno; | |
5774 | ||
5775 | if (n != 2 || contents[1] != '\n') | |
5776 | return -EIO; | |
5777 | ||
5778 | if (contents[0] == '1') { | |
5779 | found_online = true; | |
5780 | break; | |
5781 | } else if (contents[0] == '0') | |
5782 | found_offline = true; | |
5783 | else | |
5784 | return -EIO; | |
5785 | } | |
5786 | ||
5787 | return found_online || !found_offline; | |
5788 | } | |
fabe5c0e | 5789 | |
4cf7ea55 | 5790 | static int search_and_fopen_internal(const char *path, const char *mode, const char *root, char **search, FILE **_f) { |
fabe5c0e LP |
5791 | char **i; |
5792 | ||
5793 | assert(path); | |
5794 | assert(mode); | |
5795 | assert(_f); | |
5796 | ||
7d8da2c9 | 5797 | if (!path_strv_resolve_uniq(search, root)) |
fabe5c0e LP |
5798 | return -ENOMEM; |
5799 | ||
5800 | STRV_FOREACH(i, search) { | |
5801 | _cleanup_free_ char *p = NULL; | |
5802 | FILE *f; | |
5803 | ||
375eadd9 MM |
5804 | if (root) |
5805 | p = strjoin(root, *i, "/", path, NULL); | |
5806 | else | |
5807 | p = strjoin(*i, "/", path, NULL); | |
fabe5c0e LP |
5808 | if (!p) |
5809 | return -ENOMEM; | |
5810 | ||
5811 | f = fopen(p, mode); | |
5812 | if (f) { | |
5813 | *_f = f; | |
5814 | return 0; | |
5815 | } | |
5816 | ||
5817 | if (errno != ENOENT) | |
5818 | return -errno; | |
5819 | } | |
5820 | ||
5821 | return -ENOENT; | |
5822 | } | |
5823 | ||
4cf7ea55 | 5824 | int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f) { |
fabe5c0e LP |
5825 | _cleanup_strv_free_ char **copy = NULL; |
5826 | ||
5827 | assert(path); | |
5828 | assert(mode); | |
5829 | assert(_f); | |
5830 | ||
5831 | if (path_is_absolute(path)) { | |
5832 | FILE *f; | |
5833 | ||
5834 | f = fopen(path, mode); | |
5835 | if (f) { | |
5836 | *_f = f; | |
5837 | return 0; | |
5838 | } | |
5839 | ||
5840 | return -errno; | |
5841 | } | |
5842 | ||
5843 | copy = strv_copy((char**) search); | |
5844 | if (!copy) | |
5845 | return -ENOMEM; | |
5846 | ||
4cf7ea55 | 5847 | return search_and_fopen_internal(path, mode, root, copy, _f); |
fabe5c0e LP |
5848 | } |
5849 | ||
4cf7ea55 | 5850 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f) { |
fabe5c0e LP |
5851 | _cleanup_strv_free_ char **s = NULL; |
5852 | ||
5853 | if (path_is_absolute(path)) { | |
5854 | FILE *f; | |
5855 | ||
5856 | f = fopen(path, mode); | |
5857 | if (f) { | |
5858 | *_f = f; | |
5859 | return 0; | |
5860 | } | |
5861 | ||
5862 | return -errno; | |
5863 | } | |
5864 | ||
5865 | s = strv_split_nulstr(search); | |
5866 | if (!s) | |
5867 | return -ENOMEM; | |
5868 | ||
4cf7ea55 | 5869 | return search_and_fopen_internal(path, mode, root, s, _f); |
fabe5c0e | 5870 | } |
c17ec25e | 5871 | |
66e35261 LP |
5872 | char *strextend(char **x, ...) { |
5873 | va_list ap; | |
5874 | size_t f, l; | |
5875 | char *r, *p; | |
5876 | ||
5877 | assert(x); | |
5878 | ||
5879 | l = f = *x ? strlen(*x) : 0; | |
5880 | ||
5881 | va_start(ap, x); | |
5882 | for (;;) { | |
5883 | const char *t; | |
5884 | size_t n; | |
5885 | ||
5886 | t = va_arg(ap, const char *); | |
5887 | if (!t) | |
5888 | break; | |
5889 | ||
5890 | n = strlen(t); | |
5891 | if (n > ((size_t) -1) - l) { | |
5892 | va_end(ap); | |
5893 | return NULL; | |
5894 | } | |
5895 | ||
5896 | l += n; | |
5897 | } | |
5898 | va_end(ap); | |
5899 | ||
5900 | r = realloc(*x, l+1); | |
5901 | if (!r) | |
5902 | return NULL; | |
5903 | ||
5904 | p = r + f; | |
5905 | ||
5906 | va_start(ap, x); | |
5907 | for (;;) { | |
5908 | const char *t; | |
5909 | ||
5910 | t = va_arg(ap, const char *); | |
5911 | if (!t) | |
5912 | break; | |
5913 | ||
5914 | p = stpcpy(p, t); | |
5915 | } | |
5916 | va_end(ap); | |
5917 | ||
5918 | *p = 0; | |
5919 | *x = r; | |
5920 | ||
5921 | return r + l; | |
5922 | } | |
9a17484d LP |
5923 | |
5924 | char *strrep(const char *s, unsigned n) { | |
5925 | size_t l; | |
5926 | char *r, *p; | |
5927 | unsigned i; | |
5928 | ||
5929 | assert(s); | |
5930 | ||
5931 | l = strlen(s); | |
5932 | p = r = malloc(l * n + 1); | |
5933 | if (!r) | |
5934 | return NULL; | |
5935 | ||
5936 | for (i = 0; i < n; i++) | |
5937 | p = stpcpy(p, s); | |
5938 | ||
5939 | *p = 0; | |
5940 | return r; | |
5941 | } | |
392d5b37 | 5942 | |
ca2d3784 ZJS |
5943 | void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) { |
5944 | size_t a, newalloc; | |
392d5b37 LP |
5945 | void *q; |
5946 | ||
98088803 | 5947 | assert(p); |
e93c33d4 SL |
5948 | assert(allocated); |
5949 | ||
392d5b37 LP |
5950 | if (*allocated >= need) |
5951 | return *p; | |
5952 | ||
ca2d3784 ZJS |
5953 | newalloc = MAX(need * 2, 64u / size); |
5954 | a = newalloc * size; | |
98088803 LP |
5955 | |
5956 | /* check for overflows */ | |
ca2d3784 | 5957 | if (a < size * need) |
98088803 LP |
5958 | return NULL; |
5959 | ||
392d5b37 LP |
5960 | q = realloc(*p, a); |
5961 | if (!q) | |
5962 | return NULL; | |
5963 | ||
5964 | *p = q; | |
ca2d3784 | 5965 | *allocated = newalloc; |
392d5b37 LP |
5966 | return q; |
5967 | } | |
aa96c6cb | 5968 | |
ca2d3784 | 5969 | void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) { |
98088803 | 5970 | size_t prev; |
4545a231 DH |
5971 | uint8_t *q; |
5972 | ||
98088803 LP |
5973 | assert(p); |
5974 | assert(allocated); | |
5975 | ||
5976 | prev = *allocated; | |
5977 | ||
ca2d3784 | 5978 | q = greedy_realloc(p, allocated, need, size); |
4545a231 DH |
5979 | if (!q) |
5980 | return NULL; | |
5981 | ||
5982 | if (*allocated > prev) | |
ca2d3784 | 5983 | memzero(q + prev * size, (*allocated - prev) * size); |
4545a231 DH |
5984 | |
5985 | return q; | |
5986 | } | |
5987 | ||
aa96c6cb LP |
5988 | bool id128_is_valid(const char *s) { |
5989 | size_t i, l; | |
5990 | ||
5991 | l = strlen(s); | |
5992 | if (l == 32) { | |
5993 | ||
5994 | /* Simple formatted 128bit hex string */ | |
5995 | ||
5996 | for (i = 0; i < l; i++) { | |
5997 | char c = s[i]; | |
5998 | ||
5999 | if (!(c >= '0' && c <= '9') && | |
6000 | !(c >= 'a' && c <= 'z') && | |
6001 | !(c >= 'A' && c <= 'Z')) | |
6002 | return false; | |
6003 | } | |
6004 | ||
6005 | } else if (l == 36) { | |
6006 | ||
6007 | /* Formatted UUID */ | |
6008 | ||
6009 | for (i = 0; i < l; i++) { | |
6010 | char c = s[i]; | |
6011 | ||
6012 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
6013 | if (c != '-') | |
6014 | return false; | |
6015 | } else { | |
6016 | if (!(c >= '0' && c <= '9') && | |
6017 | !(c >= 'a' && c <= 'z') && | |
6018 | !(c >= 'A' && c <= 'Z')) | |
6019 | return false; | |
6020 | } | |
6021 | } | |
6022 | ||
6023 | } else | |
6024 | return false; | |
6025 | ||
6026 | return true; | |
6027 | } | |
7085053a | 6028 | |
d4ac85c6 LP |
6029 | int split_pair(const char *s, const char *sep, char **l, char **r) { |
6030 | char *x, *a, *b; | |
6031 | ||
6032 | assert(s); | |
6033 | assert(sep); | |
6034 | assert(l); | |
6035 | assert(r); | |
6036 | ||
6037 | if (isempty(sep)) | |
6038 | return -EINVAL; | |
6039 | ||
6040 | x = strstr(s, sep); | |
6041 | if (!x) | |
6042 | return -EINVAL; | |
6043 | ||
6044 | a = strndup(s, x - s); | |
6045 | if (!a) | |
6046 | return -ENOMEM; | |
6047 | ||
6048 | b = strdup(x + strlen(sep)); | |
6049 | if (!b) { | |
6050 | free(a); | |
6051 | return -ENOMEM; | |
6052 | } | |
6053 | ||
6054 | *l = a; | |
6055 | *r = b; | |
6056 | ||
6057 | return 0; | |
6058 | } | |
295edddf | 6059 | |
74df0fca | 6060 | int shall_restore_state(void) { |
059cb385 | 6061 | _cleanup_free_ char *line = NULL; |
295edddf | 6062 | char *w, *state; |
295edddf | 6063 | size_t l; |
74df0fca | 6064 | int r; |
295edddf | 6065 | |
74df0fca LP |
6066 | r = proc_cmdline(&line); |
6067 | if (r < 0) | |
6068 | return r; | |
6069 | if (r == 0) /* Container ... */ | |
6070 | return 1; | |
295edddf | 6071 | |
059cb385 | 6072 | r = 1; |
74df0fca | 6073 | |
059cb385 LP |
6074 | FOREACH_WORD_QUOTED(w, l, line, state) { |
6075 | const char *e; | |
6076 | char n[l+1]; | |
6077 | int k; | |
6078 | ||
6079 | memcpy(n, w, l); | |
6080 | n[l] = 0; | |
6081 | ||
6082 | e = startswith(n, "systemd.restore_state="); | |
6083 | if (!e) | |
6084 | continue; | |
6085 | ||
6086 | k = parse_boolean(e); | |
6087 | if (k >= 0) | |
6088 | r = k; | |
6089 | } | |
6090 | ||
6091 | return r; | |
74df0fca LP |
6092 | } |
6093 | ||
6094 | int proc_cmdline(char **ret) { | |
6095 | int r; | |
6096 | ||
6097 | if (detect_container(NULL) > 0) { | |
39883f62 | 6098 | char *buf = NULL, *p; |
02bb6cda LP |
6099 | size_t sz = 0; |
6100 | ||
6101 | r = read_full_file("/proc/1/cmdline", &buf, &sz); | |
6102 | if (r < 0) | |
6103 | return r; | |
6104 | ||
6105 | for (p = buf; p + 1 < buf + sz; p++) | |
6106 | if (*p == 0) | |
6107 | *p = ' '; | |
6108 | ||
059cb385 | 6109 | *p = 0; |
02bb6cda LP |
6110 | *ret = buf; |
6111 | return 1; | |
295edddf TG |
6112 | } |
6113 | ||
74df0fca LP |
6114 | r = read_one_line_file("/proc/cmdline", ret); |
6115 | if (r < 0) | |
6116 | return r; | |
295edddf | 6117 | |
74df0fca | 6118 | return 1; |
295edddf | 6119 | } |
bc9fd78c | 6120 | |
059cb385 | 6121 | int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) { |
141a79f4 ZJS |
6122 | _cleanup_free_ char *line = NULL; |
6123 | char *w, *state; | |
6124 | size_t l; | |
6125 | int r; | |
6126 | ||
059cb385 LP |
6127 | assert(parse_item); |
6128 | ||
141a79f4 ZJS |
6129 | r = proc_cmdline(&line); |
6130 | if (r < 0) | |
6131 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); | |
6132 | if (r <= 0) | |
6133 | return 0; | |
6134 | ||
6135 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
059cb385 | 6136 | char word[l+1], *value; |
141a79f4 | 6137 | |
059cb385 LP |
6138 | memcpy(word, w, l); |
6139 | word[l] = 0; | |
141a79f4 | 6140 | |
059cb385 LP |
6141 | /* Filter out arguments that are intended only for the |
6142 | * initrd */ | |
6143 | if (!in_initrd() && startswith(word, "rd.")) | |
6144 | continue; | |
6145 | ||
6146 | value = strchr(word, '='); | |
6147 | if (value) | |
6148 | *(value++) = 0; | |
6149 | ||
6150 | r = parse_item(word, value); | |
6151 | if (r < 0) | |
141a79f4 | 6152 | return r; |
141a79f4 ZJS |
6153 | } |
6154 | ||
6155 | return 0; | |
6156 | } | |
6157 | ||
bc9fd78c LP |
6158 | int container_get_leader(const char *machine, pid_t *pid) { |
6159 | _cleanup_free_ char *s = NULL, *class = NULL; | |
6160 | const char *p; | |
6161 | pid_t leader; | |
6162 | int r; | |
6163 | ||
6164 | assert(machine); | |
6165 | assert(pid); | |
6166 | ||
6167 | p = strappenda("/run/systemd/machines/", machine); | |
6168 | r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); | |
6169 | if (r == -ENOENT) | |
6170 | return -EHOSTDOWN; | |
6171 | if (r < 0) | |
6172 | return r; | |
6173 | if (!s) | |
6174 | return -EIO; | |
6175 | ||
6176 | if (!streq_ptr(class, "container")) | |
6177 | return -EIO; | |
6178 | ||
6179 | r = parse_pid(s, &leader); | |
6180 | if (r < 0) | |
6181 | return r; | |
6182 | if (leader <= 1) | |
6183 | return -EIO; | |
6184 | ||
6185 | *pid = leader; | |
6186 | return 0; | |
6187 | } | |
6188 | ||
878cd7e9 LP |
6189 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd) { |
6190 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1; | |
359a06aa | 6191 | int rfd = -1; |
bc9fd78c LP |
6192 | |
6193 | assert(pid >= 0); | |
bc9fd78c | 6194 | |
878cd7e9 LP |
6195 | if (mntns_fd) { |
6196 | const char *mntns; | |
a4475f57 | 6197 | |
878cd7e9 LP |
6198 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
6199 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6200 | if (mntnsfd < 0) | |
6201 | return -errno; | |
6202 | } | |
bc9fd78c | 6203 | |
878cd7e9 LP |
6204 | if (pidns_fd) { |
6205 | const char *pidns; | |
6206 | ||
6207 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
6208 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6209 | if (pidnsfd < 0) | |
6210 | return -errno; | |
6211 | } | |
6212 | ||
6213 | if (netns_fd) { | |
6214 | const char *netns; | |
6215 | ||
6216 | netns = procfs_file_alloca(pid, "ns/net"); | |
6217 | netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6218 | if (netnsfd < 0) | |
6219 | return -errno; | |
6220 | } | |
6221 | ||
6222 | if (root_fd) { | |
6223 | const char *root; | |
6224 | ||
6225 | root = procfs_file_alloca(pid, "root"); | |
6226 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
6227 | if (rfd < 0) | |
6228 | return -errno; | |
6229 | } | |
6230 | ||
6231 | if (pidns_fd) | |
6232 | *pidns_fd = pidnsfd; | |
bc9fd78c | 6233 | |
878cd7e9 LP |
6234 | if (mntns_fd) |
6235 | *mntns_fd = mntnsfd; | |
6236 | ||
6237 | if (netns_fd) | |
6238 | *netns_fd = netnsfd; | |
6239 | ||
6240 | if (root_fd) | |
6241 | *root_fd = rfd; | |
6242 | ||
6243 | pidnsfd = mntnsfd = netnsfd = -1; | |
bc9fd78c LP |
6244 | |
6245 | return 0; | |
6246 | } | |
6247 | ||
878cd7e9 | 6248 | int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd) { |
bc9fd78c | 6249 | |
878cd7e9 LP |
6250 | if (pidns_fd >= 0) |
6251 | if (setns(pidns_fd, CLONE_NEWPID) < 0) | |
6252 | return -errno; | |
a4475f57 | 6253 | |
878cd7e9 LP |
6254 | if (mntns_fd >= 0) |
6255 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
6256 | return -errno; | |
bc9fd78c | 6257 | |
878cd7e9 LP |
6258 | if (netns_fd >= 0) |
6259 | if (setns(netns_fd, CLONE_NEWNET) < 0) | |
6260 | return -errno; | |
bc9fd78c | 6261 | |
878cd7e9 LP |
6262 | if (root_fd >= 0) { |
6263 | if (fchdir(root_fd) < 0) | |
6264 | return -errno; | |
6265 | ||
6266 | if (chroot(".") < 0) | |
6267 | return -errno; | |
6268 | } | |
bc9fd78c | 6269 | |
5e2b3214 LP |
6270 | if (setresgid(0, 0, 0) < 0) |
6271 | return -errno; | |
6272 | ||
878cd7e9 LP |
6273 | if (setgroups(0, NULL) < 0) |
6274 | return -errno; | |
6275 | ||
5e2b3214 LP |
6276 | if (setresuid(0, 0, 0) < 0) |
6277 | return -errno; | |
6278 | ||
bc9fd78c LP |
6279 | return 0; |
6280 | } | |
bf108e55 | 6281 | |
9f5650ae LP |
6282 | bool pid_is_unwaited(pid_t pid) { |
6283 | /* Checks whether a PID is still valid at all, including a zombie */ | |
6284 | ||
bf108e55 LP |
6285 | if (pid <= 0) |
6286 | return false; | |
6287 | ||
6288 | if (kill(pid, 0) >= 0) | |
6289 | return true; | |
6290 | ||
6291 | return errno != ESRCH; | |
6292 | } | |
eff05270 | 6293 | |
9f5650ae LP |
6294 | bool pid_is_alive(pid_t pid) { |
6295 | int r; | |
6296 | ||
6297 | /* Checks whether a PID is still valid and not a zombie */ | |
6298 | ||
6299 | if (pid <= 0) | |
6300 | return false; | |
6301 | ||
6302 | r = get_process_state(pid); | |
6303 | if (r == -ENOENT || r == 'Z') | |
6304 | return false; | |
6305 | ||
6306 | return true; | |
6307 | } | |
6308 | ||
eff05270 LP |
6309 | int getpeercred(int fd, struct ucred *ucred) { |
6310 | socklen_t n = sizeof(struct ucred); | |
6311 | struct ucred u; | |
6312 | int r; | |
6313 | ||
6314 | assert(fd >= 0); | |
6315 | assert(ucred); | |
6316 | ||
6317 | r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &u, &n); | |
6318 | if (r < 0) | |
6319 | return -errno; | |
6320 | ||
6321 | if (n != sizeof(struct ucred)) | |
6322 | return -EIO; | |
6323 | ||
6324 | /* Check if the data is actually useful and not suppressed due | |
6325 | * to namespacing issues */ | |
6326 | if (u.pid <= 0) | |
6327 | return -ENODATA; | |
6328 | ||
6329 | *ucred = u; | |
6330 | return 0; | |
6331 | } | |
6332 | ||
6333 | int getpeersec(int fd, char **ret) { | |
6334 | socklen_t n = 64; | |
6335 | char *s; | |
6336 | int r; | |
6337 | ||
6338 | assert(fd >= 0); | |
6339 | assert(ret); | |
6340 | ||
6341 | s = new0(char, n); | |
6342 | if (!s) | |
6343 | return -ENOMEM; | |
6344 | ||
6345 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6346 | if (r < 0) { | |
6347 | free(s); | |
6348 | ||
6349 | if (errno != ERANGE) | |
6350 | return -errno; | |
6351 | ||
6352 | s = new0(char, n); | |
6353 | if (!s) | |
6354 | return -ENOMEM; | |
6355 | ||
6356 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6357 | if (r < 0) { | |
6358 | free(s); | |
6359 | return -errno; | |
6360 | } | |
6361 | } | |
6362 | ||
ae98841e LP |
6363 | if (isempty(s)) { |
6364 | free(s); | |
6365 | return -ENOTSUP; | |
6366 | } | |
6367 | ||
eff05270 LP |
6368 | *ret = s; |
6369 | return 0; | |
6370 | } | |
8e33886e | 6371 | |
0f010ef2 | 6372 | /* This is much like like mkostemp() but is subject to umask(). */ |
65b3903f | 6373 | int mkostemp_safe(char *pattern, int flags) { |
2d5bdf5b | 6374 | _cleanup_umask_ mode_t u; |
0f010ef2 | 6375 | int fd; |
65b3903f | 6376 | |
d37a91e8 | 6377 | assert(pattern); |
65b3903f | 6378 | |
2d5bdf5b LP |
6379 | u = umask(077); |
6380 | ||
0f010ef2 ZJS |
6381 | fd = mkostemp(pattern, flags); |
6382 | if (fd < 0) | |
6383 | return -errno; | |
65b3903f | 6384 | |
0f010ef2 | 6385 | return fd; |
65b3903f ZJS |
6386 | } |
6387 | ||
8e33886e | 6388 | int open_tmpfile(const char *path, int flags) { |
8e33886e | 6389 | char *p; |
a6afc4ae LP |
6390 | int fd; |
6391 | ||
6392 | assert(path); | |
8e33886e ZJS |
6393 | |
6394 | #ifdef O_TMPFILE | |
7736202c LP |
6395 | /* Try O_TMPFILE first, if it is supported */ |
6396 | fd = open(path, flags|O_TMPFILE, S_IRUSR|S_IWUSR); | |
8e33886e ZJS |
6397 | if (fd >= 0) |
6398 | return fd; | |
6399 | #endif | |
7736202c LP |
6400 | |
6401 | /* Fall back to unguessable name + unlinking */ | |
8e33886e ZJS |
6402 | p = strappenda(path, "/systemd-tmp-XXXXXX"); |
6403 | ||
a6afc4ae | 6404 | fd = mkostemp_safe(p, flags); |
8e33886e | 6405 | if (fd < 0) |
65b3903f | 6406 | return fd; |
8e33886e ZJS |
6407 | |
6408 | unlink(p); | |
6409 | return fd; | |
6410 | } | |
fdb9161c LP |
6411 | |
6412 | int fd_warn_permissions(const char *path, int fd) { | |
6413 | struct stat st; | |
6414 | ||
6415 | if (fstat(fd, &st) < 0) | |
6416 | return -errno; | |
6417 | ||
6418 | if (st.st_mode & 0111) | |
6419 | log_warning("Configuration file %s is marked executable. Please remove executable permission bits. Proceeding anyway.", path); | |
6420 | ||
6421 | if (st.st_mode & 0002) | |
6422 | log_warning("Configuration file %s is marked world-writable. Please remove world writability permission bits. Proceeding anyway.", path); | |
6423 | ||
6424 | if (getpid() == 1 && (st.st_mode & 0044) != 0044) | |
6425 | 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); | |
6426 | ||
6427 | return 0; | |
6428 | } | |
6afc95b7 | 6429 | |
ac45f971 | 6430 | unsigned long personality_from_string(const char *p) { |
6afc95b7 LP |
6431 | |
6432 | /* Parse a personality specifier. We introduce our own | |
6433 | * identifiers that indicate specific ABIs, rather than just | |
6434 | * hints regarding the register size, since we want to keep | |
6435 | * things open for multiple locally supported ABIs for the | |
6436 | * same register size. We try to reuse the ABI identifiers | |
6437 | * used by libseccomp. */ | |
6438 | ||
6439 | #if defined(__x86_64__) | |
6440 | ||
6441 | if (streq(p, "x86")) | |
6442 | return PER_LINUX32; | |
6443 | ||
6444 | if (streq(p, "x86-64")) | |
6445 | return PER_LINUX; | |
6446 | ||
6447 | #elif defined(__i386__) | |
6448 | ||
6449 | if (streq(p, "x86")) | |
6450 | return PER_LINUX; | |
6451 | #endif | |
6452 | ||
6453 | /* personality(7) documents that 0xffffffffUL is used for | |
6454 | * querying the current personality, hence let's use that here | |
6455 | * as error indicator. */ | |
6456 | return 0xffffffffUL; | |
6457 | } | |
ac45f971 LP |
6458 | |
6459 | const char* personality_to_string(unsigned long p) { | |
6460 | ||
6461 | #if defined(__x86_64__) | |
6462 | ||
6463 | if (p == PER_LINUX32) | |
6464 | return "x86"; | |
6465 | ||
6466 | if (p == PER_LINUX) | |
6467 | return "x86-64"; | |
6468 | ||
6469 | #elif defined(__i386__) | |
6470 | ||
6471 | if (p == PER_LINUX) | |
6472 | return "x86"; | |
6473 | #endif | |
6474 | ||
6475 | return NULL; | |
6476 | } | |
1c231f56 LP |
6477 | |
6478 | uint64_t physical_memory(void) { | |
6479 | long mem; | |
6480 | ||
6481 | /* We return this as uint64_t in case we are running as 32bit | |
6482 | * process on a 64bit kernel with huge amounts of memory */ | |
6483 | ||
6484 | mem = sysconf(_SC_PHYS_PAGES); | |
6485 | assert(mem > 0); | |
6486 | ||
6487 | return (uint64_t) mem * (uint64_t) page_size(); | |
6488 | } | |
6db615c1 LP |
6489 | |
6490 | char* mount_test_option(const char *haystack, const char *needle) { | |
6491 | ||
6492 | struct mntent me = { | |
6493 | .mnt_opts = (char*) haystack | |
6494 | }; | |
6495 | ||
6496 | assert(needle); | |
6497 | ||
6498 | /* Like glibc's hasmntopt(), but works on a string, not a | |
6499 | * struct mntent */ | |
6500 | ||
6501 | if (!haystack) | |
6502 | return NULL; | |
6503 | ||
6504 | return hasmntopt(&me, needle); | |
6505 | } | |
29bfbcd6 LP |
6506 | |
6507 | void hexdump(FILE *f, const void *p, size_t s) { | |
6508 | const uint8_t *b = p; | |
6509 | unsigned n = 0; | |
6510 | ||
6511 | assert(s == 0 || b); | |
6512 | ||
6513 | while (s > 0) { | |
6514 | size_t i; | |
6515 | ||
6516 | fprintf(f, "%04x ", n); | |
6517 | ||
6518 | for (i = 0; i < 16; i++) { | |
6519 | ||
6520 | if (i >= s) | |
6521 | fputs(" ", f); | |
6522 | else | |
6523 | fprintf(f, "%02x ", b[i]); | |
6524 | ||
6525 | if (i == 7) | |
6526 | fputc(' ', f); | |
6527 | } | |
6528 | ||
6529 | fputc(' ', f); | |
6530 | ||
6531 | for (i = 0; i < 16; i++) { | |
6532 | ||
6533 | if (i >= s) | |
6534 | fputc(' ', f); | |
6535 | else | |
6536 | fputc(isprint(b[i]) ? (char) b[i] : '.', f); | |
6537 | } | |
6538 | ||
6539 | fputc('\n', f); | |
6540 | ||
6541 | if (s < 16) | |
6542 | break; | |
6543 | ||
6544 | n += 16; | |
6545 | b += 16; | |
6546 | s -= 16; | |
6547 | } | |
6548 | } | |
c5220a94 | 6549 | |
966bff26 | 6550 | int update_reboot_param_file(const char *param) { |
c5220a94 MO |
6551 | int r = 0; |
6552 | ||
6553 | if (param) { | |
6554 | ||
6555 | r = write_string_file(REBOOT_PARAM_FILE, param); | |
6556 | if (r < 0) | |
6557 | log_error("Failed to write reboot param to " | |
6558 | REBOOT_PARAM_FILE": %s", strerror(-r)); | |
6559 | } else | |
6560 | unlink(REBOOT_PARAM_FILE); | |
6561 | ||
6562 | return r; | |
6563 | } | |
6d313367 LP |
6564 | |
6565 | int umount_recursive(const char *prefix, int flags) { | |
6566 | bool again; | |
6567 | int n = 0, r; | |
6568 | ||
6569 | /* Try to umount everything recursively below a | |
6570 | * directory. Also, take care of stacked mounts, and keep | |
6571 | * unmounting them until they are gone. */ | |
6572 | ||
6573 | do { | |
6574 | _cleanup_fclose_ FILE *proc_self_mountinfo = NULL; | |
6575 | ||
6576 | again = false; | |
6577 | r = 0; | |
6578 | ||
6579 | proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"); | |
6580 | if (!proc_self_mountinfo) | |
6581 | return -errno; | |
6582 | ||
6583 | for (;;) { | |
6584 | _cleanup_free_ char *path = NULL, *p = NULL; | |
6585 | int k; | |
6586 | ||
6587 | k = fscanf(proc_self_mountinfo, | |
6588 | "%*s " /* (1) mount id */ | |
6589 | "%*s " /* (2) parent id */ | |
6590 | "%*s " /* (3) major:minor */ | |
6591 | "%*s " /* (4) root */ | |
6592 | "%ms " /* (5) mount point */ | |
6593 | "%*s" /* (6) mount options */ | |
6594 | "%*[^-]" /* (7) optional fields */ | |
6595 | "- " /* (8) separator */ | |
6596 | "%*s " /* (9) file system type */ | |
6597 | "%*s" /* (10) mount source */ | |
6598 | "%*s" /* (11) mount options 2 */ | |
6599 | "%*[^\n]", /* some rubbish at the end */ | |
6600 | &path); | |
6d313367 LP |
6601 | if (k != 1) { |
6602 | if (k == EOF) | |
6603 | break; | |
6604 | ||
6605 | continue; | |
6606 | } | |
6607 | ||
6608 | p = cunescape(path); | |
6609 | if (!p) | |
6610 | return -ENOMEM; | |
6611 | ||
6612 | if (!path_startswith(p, prefix)) | |
6613 | continue; | |
6614 | ||
6615 | if (umount2(p, flags) < 0) { | |
6616 | r = -errno; | |
6617 | continue; | |
6618 | } | |
6619 | ||
6620 | again = true; | |
6621 | n++; | |
6622 | ||
6623 | break; | |
6624 | } | |
6625 | ||
6626 | } while (again); | |
6627 | ||
6628 | return r ? r : n; | |
6629 | } | |
d6797c92 LP |
6630 | |
6631 | int bind_remount_recursive(const char *prefix, bool ro) { | |
6632 | _cleanup_set_free_free_ Set *done = NULL; | |
6633 | _cleanup_free_ char *cleaned = NULL; | |
6634 | int r; | |
6635 | ||
6636 | /* Recursively remount a directory (and all its submounts) | |
6637 | * read-only or read-write. If the directory is already | |
6638 | * mounted, we reuse the mount and simply mark it | |
6639 | * MS_BIND|MS_RDONLY (or remove the MS_RDONLY for read-write | |
6640 | * operation). If it isn't we first make it one. Afterwards we | |
6641 | * apply MS_BIND|MS_RDONLY (or remove MS_RDONLY) to all | |
6642 | * submounts we can access, too. When mounts are stacked on | |
6643 | * the same mount point we only care for each individual | |
6644 | * "top-level" mount on each point, as we cannot | |
6645 | * influence/access the underlying mounts anyway. We do not | |
6646 | * have any effect on future submounts that might get | |
6647 | * propagated, they migt be writable. This includes future | |
6648 | * submounts that have been triggered via autofs. */ | |
6649 | ||
6650 | cleaned = strdup(prefix); | |
6651 | if (!cleaned) | |
6652 | return -ENOMEM; | |
6653 | ||
6654 | path_kill_slashes(cleaned); | |
6655 | ||
6656 | done = set_new(string_hash_func, string_compare_func); | |
6657 | if (!done) | |
6658 | return -ENOMEM; | |
6659 | ||
6660 | for (;;) { | |
6661 | _cleanup_fclose_ FILE *proc_self_mountinfo = NULL; | |
6662 | _cleanup_set_free_free_ Set *todo = NULL; | |
6663 | bool top_autofs = false; | |
6664 | char *x; | |
6665 | ||
6666 | todo = set_new(string_hash_func, string_compare_func); | |
6667 | if (!todo) | |
6668 | return -ENOMEM; | |
6669 | ||
6670 | proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"); | |
6671 | if (!proc_self_mountinfo) | |
6672 | return -errno; | |
6673 | ||
6674 | for (;;) { | |
6675 | _cleanup_free_ char *path = NULL, *p = NULL, *type = NULL; | |
6676 | int k; | |
6677 | ||
6678 | k = fscanf(proc_self_mountinfo, | |
6679 | "%*s " /* (1) mount id */ | |
6680 | "%*s " /* (2) parent id */ | |
6681 | "%*s " /* (3) major:minor */ | |
6682 | "%*s " /* (4) root */ | |
6683 | "%ms " /* (5) mount point */ | |
6684 | "%*s" /* (6) mount options (superblock) */ | |
6685 | "%*[^-]" /* (7) optional fields */ | |
6686 | "- " /* (8) separator */ | |
6687 | "%ms " /* (9) file system type */ | |
6688 | "%*s" /* (10) mount source */ | |
6689 | "%*s" /* (11) mount options (bind mount) */ | |
6690 | "%*[^\n]", /* some rubbish at the end */ | |
6691 | &path, | |
6692 | &type); | |
6693 | if (k != 2) { | |
6694 | if (k == EOF) | |
6695 | break; | |
6696 | ||
6697 | continue; | |
6698 | } | |
6699 | ||
6700 | p = cunescape(path); | |
6701 | if (!p) | |
6702 | return -ENOMEM; | |
6703 | ||
6704 | /* Let's ignore autofs mounts. If they aren't | |
6705 | * triggered yet, we want to avoid triggering | |
6706 | * them, as we don't make any guarantees for | |
6707 | * future submounts anyway. If they are | |
6708 | * already triggered, then we will find | |
6709 | * another entry for this. */ | |
6710 | if (streq(type, "autofs")) { | |
6711 | top_autofs = top_autofs || path_equal(cleaned, p); | |
6712 | continue; | |
6713 | } | |
6714 | ||
6715 | if (path_startswith(p, cleaned) && | |
6716 | !set_contains(done, p)) { | |
6717 | ||
6718 | r = set_consume(todo, p); | |
6719 | p = NULL; | |
6720 | ||
6721 | if (r == -EEXIST) | |
6722 | continue; | |
6723 | if (r < 0) | |
6724 | return r; | |
6725 | } | |
6726 | } | |
6727 | ||
6728 | /* If we have no submounts to process anymore and if | |
6729 | * the root is either already done, or an autofs, we | |
6730 | * are done */ | |
6731 | if (set_isempty(todo) && | |
6732 | (top_autofs || set_contains(done, cleaned))) | |
6733 | return 0; | |
6734 | ||
6735 | if (!set_contains(done, cleaned) && | |
6736 | !set_contains(todo, cleaned)) { | |
6737 | /* The prefix directory itself is not yet a | |
6738 | * mount, make it one. */ | |
6739 | if (mount(cleaned, cleaned, NULL, MS_BIND|MS_REC, NULL) < 0) | |
6740 | return -errno; | |
6741 | ||
6742 | if (mount(NULL, prefix, NULL, MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) | |
6743 | return -errno; | |
6744 | ||
6745 | x = strdup(cleaned); | |
6746 | if (!x) | |
6747 | return -ENOMEM; | |
6748 | ||
6749 | r = set_consume(done, x); | |
6750 | if (r < 0) | |
6751 | return r; | |
6752 | } | |
6753 | ||
6754 | while ((x = set_steal_first(todo))) { | |
6755 | ||
6756 | r = set_consume(done, x); | |
6757 | if (r == -EEXIST) | |
6758 | continue; | |
6759 | if (r < 0) | |
6760 | return r; | |
6761 | ||
6762 | if (mount(NULL, x, NULL, MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) { | |
6763 | ||
6764 | /* Deal with mount points that are | |
6765 | * obstructed by a later mount */ | |
6766 | ||
6767 | if (errno != ENOENT) | |
6768 | return -errno; | |
6769 | } | |
6770 | ||
6771 | } | |
6772 | } | |
6773 | } | |
1b992147 LP |
6774 | |
6775 | int fflush_and_check(FILE *f) { | |
45c196a7 | 6776 | assert(f); |
1b992147 LP |
6777 | |
6778 | errno = 0; | |
6779 | fflush(f); | |
6780 | ||
6781 | if (ferror(f)) | |
6782 | return errno ? -errno : -EIO; | |
6783 | ||
6784 | return 0; | |
6785 | } | |
2e78fa79 LP |
6786 | |
6787 | char *tempfn_xxxxxx(const char *p) { | |
6788 | const char *fn; | |
6789 | char *t; | |
6790 | size_t k; | |
6791 | ||
6792 | assert(p); | |
6793 | ||
6794 | t = new(char, strlen(p) + 1 + 6 + 1); | |
6795 | if (!t) | |
6796 | return NULL; | |
6797 | ||
6798 | fn = basename(p); | |
6799 | k = fn - p; | |
6800 | ||
6801 | strcpy(stpcpy(stpcpy(mempcpy(t, p, k), "."), fn), "XXXXXX"); | |
6802 | ||
6803 | return t; | |
6804 | } | |
6805 | ||
6806 | char *tempfn_random(const char *p) { | |
6807 | const char *fn; | |
6808 | char *t, *x; | |
6809 | uint64_t u; | |
6810 | size_t k; | |
6811 | unsigned i; | |
6812 | ||
6813 | assert(p); | |
6814 | ||
6815 | t = new(char, strlen(p) + 1 + 16 + 1); | |
6816 | if (!t) | |
6817 | return NULL; | |
6818 | ||
6819 | fn = basename(p); | |
6820 | k = fn - p; | |
6821 | ||
6822 | x = stpcpy(stpcpy(mempcpy(t, p, k), "."), fn); | |
6823 | ||
6824 | u = random_u64(); | |
6825 | for (i = 0; i < 16; i++) { | |
6826 | *(x++) = hexchar(u & 0xF); | |
6827 | u >>= 4; | |
6828 | } | |
6829 | ||
6830 | *x = 0; | |
6831 | ||
6832 | return t; | |
6833 | } | |
fecc80c1 LP |
6834 | |
6835 | /* make sure the hostname is not "localhost" */ | |
6836 | bool is_localhost(const char *hostname) { | |
6837 | assert(hostname); | |
6838 | ||
6839 | /* This tries to identify local hostnames described in RFC6761 | |
6840 | * plus the redhatism of .localdomain */ | |
6841 | ||
6842 | return streq(hostname, "localhost") || | |
6843 | streq(hostname, "localhost.") || | |
6844 | endswith(hostname, ".localhost") || | |
6845 | endswith(hostname, ".localhost.") || | |
6846 | endswith(hostname, ".localdomain") || | |
6847 | endswith(hostname, ".localdomain."); | |
6848 | } | |
45035609 LP |
6849 | |
6850 | int take_password_lock(const char *root) { | |
6851 | ||
6852 | struct flock flock = { | |
6853 | .l_type = F_WRLCK, | |
6854 | .l_whence = SEEK_SET, | |
6855 | .l_start = 0, | |
6856 | .l_len = 0, | |
6857 | }; | |
6858 | ||
6859 | const char *path; | |
6860 | int fd, r; | |
6861 | ||
6862 | /* This is roughly the same as lckpwdf(), but not as awful. We | |
6863 | * don't want to use alarm() and signals, hence we implement | |
6864 | * our own trivial version of this. | |
6865 | * | |
6866 | * Note that shadow-utils also takes per-database locks in | |
6867 | * addition to lckpwdf(). However, we don't given that they | |
6868 | * are redundant as they they invoke lckpwdf() first and keep | |
6869 | * it during everything they do. The per-database locks are | |
6870 | * awfully racy, and thus we just won't do them. */ | |
6871 | ||
6872 | if (root) | |
6873 | path = strappenda(root, "/etc/.pwd.lock"); | |
6874 | else | |
6875 | path = "/etc/.pwd.lock"; | |
6876 | ||
6877 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0600); | |
6878 | if (fd < 0) | |
6879 | return -errno; | |
6880 | ||
6881 | r = fcntl(fd, F_SETLKW, &flock); | |
6882 | if (r < 0) { | |
6883 | safe_close(fd); | |
6884 | return -errno; | |
6885 | } | |
6886 | ||
6887 | return fd; | |
6888 | } |