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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
60918275 LP |
22 | #include <assert.h> |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
85261803 | 26 | #include <stdlib.h> |
034c6ed7 LP |
27 | #include <signal.h> |
28 | #include <stdio.h> | |
1dccbe19 LP |
29 | #include <syslog.h> |
30 | #include <sched.h> | |
31 | #include <sys/resource.h> | |
ef886c6a | 32 | #include <linux/sched.h> |
a9f5d454 LP |
33 | #include <sys/types.h> |
34 | #include <sys/stat.h> | |
3a0ecb08 | 35 | #include <fcntl.h> |
a0d40ac5 | 36 | #include <dirent.h> |
601f6a1e LP |
37 | #include <sys/ioctl.h> |
38 | #include <linux/vt.h> | |
39 | #include <linux/tiocl.h> | |
80876c20 LP |
40 | #include <termios.h> |
41 | #include <stdarg.h> | |
42 | #include <sys/inotify.h> | |
43 | #include <sys/poll.h> | |
3177a7fa | 44 | #include <ctype.h> |
5b6319dc | 45 | #include <sys/prctl.h> |
ef2f1067 LP |
46 | #include <sys/utsname.h> |
47 | #include <pwd.h> | |
4fd5948e | 48 | #include <netinet/ip.h> |
3fe5e5d4 | 49 | #include <linux/kd.h> |
afea26ad | 50 | #include <dlfcn.h> |
2e78aa99 | 51 | #include <sys/wait.h> |
7948c4df | 52 | #include <sys/time.h> |
8092a428 | 53 | #include <glob.h> |
4b67834e | 54 | #include <grp.h> |
87d2c1ff | 55 | #include <sys/mman.h> |
825c6fe5 LP |
56 | #include <sys/vfs.h> |
57 | #include <linux/magic.h> | |
0b507b17 | 58 | #include <limits.h> |
09017585 MS |
59 | #include <langinfo.h> |
60 | #include <locale.h> | |
844ec79b | 61 | #include <libgen.h> |
2b6bf07d | 62 | #undef basename |
60918275 | 63 | |
9bf3b535 LP |
64 | #ifdef HAVE_SYS_AUXV_H |
65 | #include <sys/auxv.h> | |
66 | #endif | |
67 | ||
60918275 LP |
68 | #include "macro.h" |
69 | #include "util.h" | |
1dccbe19 LP |
70 | #include "ioprio.h" |
71 | #include "missing.h" | |
a9f5d454 | 72 | #include "log.h" |
65d2ebdc | 73 | #include "strv.h" |
e51bc1a2 | 74 | #include "label.h" |
9eb977db | 75 | #include "path-util.h" |
d06dacd0 | 76 | #include "exit-status.h" |
83cc030f | 77 | #include "hashmap.h" |
4d1a6904 | 78 | #include "env-util.h" |
a5c32cff | 79 | #include "fileio.h" |
8f6ce71f | 80 | #include "device-nodes.h" |
f405e86d SL |
81 | #include "utf8.h" |
82 | #include "gunicode.h" | |
295edddf | 83 | #include "virt.h" |
477def80 | 84 | #include "def.h" |
56cf987f | 85 | |
9a0e6896 LP |
86 | int saved_argc = 0; |
87 | char **saved_argv = NULL; | |
9086e840 | 88 | |
28917d7d | 89 | static volatile unsigned cached_columns = 0; |
ed757c0c | 90 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 91 | |
37f85e66 | 92 | size_t page_size(void) { |
ec202eae | 93 | static thread_local size_t pgsz = 0; |
37f85e66 | 94 | long r; |
95 | ||
87d2c1ff | 96 | if (_likely_(pgsz > 0)) |
37f85e66 | 97 | return pgsz; |
98 | ||
e67f47e5 LP |
99 | r = sysconf(_SC_PAGESIZE); |
100 | assert(r > 0); | |
37f85e66 | 101 | |
102 | pgsz = (size_t) r; | |
37f85e66 | 103 | return pgsz; |
104 | } | |
105 | ||
e05797fb LP |
106 | bool streq_ptr(const char *a, const char *b) { |
107 | ||
108 | /* Like streq(), but tries to make sense of NULL pointers */ | |
109 | ||
110 | if (a && b) | |
111 | return streq(a, b); | |
112 | ||
113 | if (!a && !b) | |
114 | return true; | |
115 | ||
116 | return false; | |
117 | } | |
118 | ||
8c7c140f | 119 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
120 | size_t sl, pl; |
121 | ||
122 | assert(s); | |
123 | assert(postfix); | |
124 | ||
125 | sl = strlen(s); | |
126 | pl = strlen(postfix); | |
127 | ||
d4d0d4db | 128 | if (pl == 0) |
8c7c140f | 129 | return (char*) s + sl; |
d4d0d4db | 130 | |
60918275 | 131 | if (sl < pl) |
8c7c140f LP |
132 | return NULL; |
133 | ||
134 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
135 | return NULL; | |
60918275 | 136 | |
8c7c140f | 137 | return (char*) s + sl - pl; |
60918275 LP |
138 | } |
139 | ||
79d6d816 LP |
140 | bool first_word(const char *s, const char *word) { |
141 | size_t sl, wl; | |
142 | ||
143 | assert(s); | |
144 | assert(word); | |
145 | ||
146 | sl = strlen(s); | |
147 | wl = strlen(word); | |
148 | ||
149 | if (sl < wl) | |
150 | return false; | |
151 | ||
d4d0d4db LP |
152 | if (wl == 0) |
153 | return true; | |
154 | ||
79d6d816 LP |
155 | if (memcmp(s, word, wl) != 0) |
156 | return false; | |
157 | ||
d4d0d4db LP |
158 | return s[wl] == 0 || |
159 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
160 | } |
161 | ||
42f4e3c4 | 162 | int close_nointr(int fd) { |
b0ee8068 | 163 | int r; |
60918275 | 164 | |
b0ee8068 CW |
165 | assert(fd >= 0); |
166 | r = close(fd); | |
167 | ||
168 | /* Just ignore EINTR; a retry loop is the wrong | |
169 | * thing to do on Linux. | |
170 | * | |
171 | * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html | |
172 | * https://bugzilla.gnome.org/show_bug.cgi?id=682819 | |
173 | * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR | |
174 | * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain | |
175 | */ | |
176 | if (_unlikely_(r < 0 && errno == EINTR)) | |
177 | return 0; | |
178 | else if (r >= 0) | |
179 | return r; | |
180 | else | |
181 | return -errno; | |
60918275 | 182 | } |
85261803 | 183 | |
85f136b5 | 184 | void close_nointr_nofail(int fd) { |
5c0aa72a | 185 | PROTECT_ERRNO; |
85f136b5 LP |
186 | |
187 | /* like close_nointr() but cannot fail, and guarantees errno | |
188 | * is unchanged */ | |
189 | ||
190 | assert_se(close_nointr(fd) == 0); | |
191 | } | |
192 | ||
5b6319dc LP |
193 | void close_many(const int fds[], unsigned n_fd) { |
194 | unsigned i; | |
195 | ||
2c93b4ef LP |
196 | assert(fds || n_fd <= 0); |
197 | ||
5b6319dc LP |
198 | for (i = 0; i < n_fd; i++) |
199 | close_nointr_nofail(fds[i]); | |
200 | } | |
201 | ||
4b73a0c0 LP |
202 | int unlink_noerrno(const char *path) { |
203 | PROTECT_ERRNO; | |
204 | int r; | |
205 | ||
206 | r = unlink(path); | |
207 | if (r < 0) | |
208 | return -errno; | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
85261803 LP |
213 | int parse_boolean(const char *v) { |
214 | assert(v); | |
215 | ||
b43d1d01 | 216 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || strcaseeq(v, "on")) |
85261803 | 217 | return 1; |
b43d1d01 | 218 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || strcaseeq(v, "off")) |
85261803 LP |
219 | return 0; |
220 | ||
221 | return -EINVAL; | |
222 | } | |
223 | ||
3ba686c1 | 224 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 225 | unsigned long ul = 0; |
3ba686c1 LP |
226 | pid_t pid; |
227 | int r; | |
228 | ||
229 | assert(s); | |
230 | assert(ret_pid); | |
231 | ||
e67f47e5 LP |
232 | r = safe_atolu(s, &ul); |
233 | if (r < 0) | |
3ba686c1 LP |
234 | return r; |
235 | ||
236 | pid = (pid_t) ul; | |
237 | ||
238 | if ((unsigned long) pid != ul) | |
239 | return -ERANGE; | |
240 | ||
241 | if (pid <= 0) | |
242 | return -ERANGE; | |
243 | ||
244 | *ret_pid = pid; | |
245 | return 0; | |
246 | } | |
247 | ||
034a2a52 LP |
248 | int parse_uid(const char *s, uid_t* ret_uid) { |
249 | unsigned long ul = 0; | |
250 | uid_t uid; | |
251 | int r; | |
252 | ||
253 | assert(s); | |
254 | assert(ret_uid); | |
255 | ||
e67f47e5 LP |
256 | r = safe_atolu(s, &ul); |
257 | if (r < 0) | |
034a2a52 LP |
258 | return r; |
259 | ||
260 | uid = (uid_t) ul; | |
261 | ||
262 | if ((unsigned long) uid != ul) | |
263 | return -ERANGE; | |
264 | ||
265 | *ret_uid = uid; | |
266 | return 0; | |
267 | } | |
268 | ||
85261803 LP |
269 | int safe_atou(const char *s, unsigned *ret_u) { |
270 | char *x = NULL; | |
034c6ed7 | 271 | unsigned long l; |
85261803 LP |
272 | |
273 | assert(s); | |
274 | assert(ret_u); | |
275 | ||
276 | errno = 0; | |
277 | l = strtoul(s, &x, 0); | |
278 | ||
f3910003 | 279 | if (!x || x == s || *x || errno) |
48deb058 | 280 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 281 | |
034c6ed7 | 282 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
283 | return -ERANGE; |
284 | ||
285 | *ret_u = (unsigned) l; | |
286 | return 0; | |
287 | } | |
288 | ||
289 | int safe_atoi(const char *s, int *ret_i) { | |
290 | char *x = NULL; | |
034c6ed7 | 291 | long l; |
85261803 LP |
292 | |
293 | assert(s); | |
294 | assert(ret_i); | |
295 | ||
296 | errno = 0; | |
297 | l = strtol(s, &x, 0); | |
298 | ||
f3910003 | 299 | if (!x || x == s || *x || errno) |
48deb058 | 300 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 301 | |
034c6ed7 | 302 | if ((long) (int) l != l) |
85261803 LP |
303 | return -ERANGE; |
304 | ||
034c6ed7 LP |
305 | *ret_i = (int) l; |
306 | return 0; | |
307 | } | |
308 | ||
034c6ed7 LP |
309 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
310 | char *x = NULL; | |
311 | unsigned long long l; | |
312 | ||
313 | assert(s); | |
314 | assert(ret_llu); | |
315 | ||
316 | errno = 0; | |
317 | l = strtoull(s, &x, 0); | |
318 | ||
f3910003 | 319 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
320 | return errno ? -errno : -EINVAL; |
321 | ||
322 | *ret_llu = l; | |
323 | return 0; | |
324 | } | |
325 | ||
326 | int safe_atolli(const char *s, long long int *ret_lli) { | |
327 | char *x = NULL; | |
328 | long long l; | |
329 | ||
330 | assert(s); | |
331 | assert(ret_lli); | |
332 | ||
333 | errno = 0; | |
334 | l = strtoll(s, &x, 0); | |
335 | ||
f3910003 | 336 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
337 | return errno ? -errno : -EINVAL; |
338 | ||
339 | *ret_lli = l; | |
85261803 LP |
340 | return 0; |
341 | } | |
a41e8209 | 342 | |
f7900e25 TA |
343 | int safe_atod(const char *s, double *ret_d) { |
344 | char *x = NULL; | |
32b2634e | 345 | double d = 0; |
f7900e25 TA |
346 | |
347 | assert(s); | |
348 | assert(ret_d); | |
349 | ||
d6dd604b LP |
350 | RUN_WITH_LOCALE(LC_NUMERIC_MASK, "C") { |
351 | errno = 0; | |
352 | d = strtod(s, &x); | |
353 | } | |
f7900e25 TA |
354 | |
355 | if (!x || x == s || *x || errno) | |
356 | return errno ? -errno : -EINVAL; | |
357 | ||
358 | *ret_d = (double) d; | |
359 | return 0; | |
360 | } | |
361 | ||
bf85c24d SP |
362 | static size_t strcspn_escaped(const char *s, const char *reject) { |
363 | bool escaped = false; | |
364 | size_t n; | |
365 | ||
366 | for (n=0; s[n]; n++) { | |
367 | if (escaped) | |
368 | escaped = false; | |
369 | else if (s[n] == '\\') | |
370 | escaped = true; | |
371 | else if (strchr(reject, s[n])) | |
372 | return n; | |
373 | } | |
374 | return n; | |
375 | } | |
376 | ||
a41e8209 | 377 | /* Split a string into words. */ |
bf85c24d | 378 | char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state) { |
a41e8209 LP |
379 | char *current; |
380 | ||
381 | current = *state ? *state : (char*) c; | |
382 | ||
383 | if (!*current || *c == 0) | |
384 | return NULL; | |
385 | ||
65d2ebdc | 386 | current += strspn(current, separator); |
bf85c24d | 387 | if (!*current) |
70f75a52 LP |
388 | return NULL; |
389 | ||
bf85c24d SP |
390 | if (quoted && strchr("\'\"", *current)) { |
391 | char quotechar = *(current++); | |
392 | *l = strcspn_escaped(current, (char[]){quotechar, '\0'}); | |
393 | *state = current+*l+1; | |
394 | } else if (quoted) { | |
395 | *l = strcspn_escaped(current, separator); | |
396 | *state = current+*l; | |
034c6ed7 | 397 | } else { |
bf85c24d SP |
398 | *l = strcspn(current, separator); |
399 | *state = current+*l; | |
034c6ed7 LP |
400 | } |
401 | ||
5b12334d | 402 | return (char*) current; |
034c6ed7 LP |
403 | } |
404 | ||
034c6ed7 LP |
405 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
406 | int r; | |
b4696bce | 407 | _cleanup_free_ char *line = NULL; |
bb00e604 | 408 | long unsigned ppid; |
49aa47c7 | 409 | const char *p; |
034c6ed7 | 410 | |
49aa47c7 | 411 | assert(pid >= 0); |
034c6ed7 LP |
412 | assert(_ppid); |
413 | ||
49aa47c7 LP |
414 | if (pid == 0) { |
415 | *_ppid = getppid(); | |
416 | return 0; | |
417 | } | |
034c6ed7 | 418 | |
49aa47c7 | 419 | p = procfs_file_alloca(pid, "stat"); |
b4696bce SP |
420 | r = read_one_line_file(p, &line); |
421 | if (r < 0) | |
034c6ed7 | 422 | return r; |
034c6ed7 | 423 | |
034c6ed7 LP |
424 | /* Let's skip the pid and comm fields. The latter is enclosed |
425 | * in () but does not escape any () in its value, so let's | |
426 | * skip over it manually */ | |
427 | ||
2fbe635a LP |
428 | p = strrchr(line, ')'); |
429 | if (!p) | |
034c6ed7 LP |
430 | return -EIO; |
431 | ||
432 | p++; | |
433 | ||
434 | if (sscanf(p, " " | |
435 | "%*c " /* state */ | |
bb00e604 | 436 | "%lu ", /* ppid */ |
034c6ed7 LP |
437 | &ppid) != 1) |
438 | return -EIO; | |
439 | ||
bb00e604 | 440 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
441 | return -ERANGE; |
442 | ||
443 | *_ppid = (pid_t) ppid; | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
7640a5de | 448 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
b4696bce SP |
449 | int r; |
450 | _cleanup_free_ char *line = NULL; | |
49aa47c7 | 451 | const char *p; |
7640a5de | 452 | |
49aa47c7 | 453 | assert(pid >= 0); |
7640a5de LP |
454 | assert(st); |
455 | ||
b68fa010 | 456 | p = procfs_file_alloca(pid, "stat"); |
b4696bce SP |
457 | r = read_one_line_file(p, &line); |
458 | if (r < 0) | |
459 | return r; | |
7640a5de LP |
460 | |
461 | /* Let's skip the pid and comm fields. The latter is enclosed | |
462 | * in () but does not escape any () in its value, so let's | |
463 | * skip over it manually */ | |
464 | ||
e67f47e5 LP |
465 | p = strrchr(line, ')'); |
466 | if (!p) | |
7640a5de LP |
467 | return -EIO; |
468 | ||
469 | p++; | |
470 | ||
471 | if (sscanf(p, " " | |
472 | "%*c " /* state */ | |
473 | "%*d " /* ppid */ | |
474 | "%*d " /* pgrp */ | |
475 | "%*d " /* session */ | |
476 | "%*d " /* tty_nr */ | |
477 | "%*d " /* tpgid */ | |
478 | "%*u " /* flags */ | |
479 | "%*u " /* minflt */ | |
480 | "%*u " /* cminflt */ | |
481 | "%*u " /* majflt */ | |
482 | "%*u " /* cmajflt */ | |
483 | "%*u " /* utime */ | |
484 | "%*u " /* stime */ | |
485 | "%*d " /* cutime */ | |
486 | "%*d " /* cstime */ | |
487 | "%*d " /* priority */ | |
488 | "%*d " /* nice */ | |
489 | "%*d " /* num_threads */ | |
490 | "%*d " /* itrealvalue */ | |
491 | "%llu " /* starttime */, | |
492 | st) != 1) | |
493 | return -EIO; | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
34ca941c LP |
498 | int fchmod_umask(int fd, mode_t m) { |
499 | mode_t u; | |
500 | int r; | |
501 | ||
502 | u = umask(0777); | |
503 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
504 | umask(u); | |
505 | ||
506 | return r; | |
507 | } | |
508 | ||
7072ced8 LP |
509 | char *truncate_nl(char *s) { |
510 | assert(s); | |
511 | ||
512 | s[strcspn(s, NEWLINE)] = 0; | |
513 | return s; | |
514 | } | |
515 | ||
93b5eaec | 516 | int get_process_state(pid_t pid) { |
e10c9985 YS |
517 | const char *p; |
518 | char state; | |
519 | int r; | |
520 | _cleanup_free_ char *line = NULL; | |
521 | ||
522 | assert(pid >= 0); | |
523 | ||
524 | p = procfs_file_alloca(pid, "stat"); | |
525 | r = read_one_line_file(p, &line); | |
526 | if (r < 0) | |
527 | return r; | |
528 | ||
529 | p = strrchr(line, ')'); | |
530 | if (!p) | |
531 | return -EIO; | |
532 | ||
533 | p++; | |
534 | ||
535 | if (sscanf(p, " %c", &state) != 1) | |
536 | return -EIO; | |
537 | ||
538 | return (unsigned char) state; | |
539 | } | |
540 | ||
87d2c1ff | 541 | int get_process_comm(pid_t pid, char **name) { |
49aa47c7 | 542 | const char *p; |
5b12334d | 543 | int r; |
7072ced8 | 544 | |
7072ced8 | 545 | assert(name); |
49aa47c7 | 546 | assert(pid >= 0); |
7072ced8 | 547 | |
b68fa010 | 548 | p = procfs_file_alloca(pid, "comm"); |
7072ced8 | 549 | |
5b12334d LP |
550 | r = read_one_line_file(p, name); |
551 | if (r == -ENOENT) | |
552 | return -ESRCH; | |
553 | ||
554 | return r; | |
7072ced8 LP |
555 | } |
556 | ||
87d2c1ff | 557 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
49aa47c7 | 558 | _cleanup_fclose_ FILE *f = NULL; |
9bdbc2e2 | 559 | char *r = NULL, *k; |
49aa47c7 | 560 | const char *p; |
c59760ee | 561 | int c; |
c59760ee | 562 | |
c59760ee | 563 | assert(line); |
49aa47c7 | 564 | assert(pid >= 0); |
c59760ee | 565 | |
b68fa010 | 566 | p = procfs_file_alloca(pid, "cmdline"); |
c59760ee | 567 | |
49aa47c7 | 568 | f = fopen(p, "re"); |
c59760ee LP |
569 | if (!f) |
570 | return -errno; | |
49aa47c7 | 571 | |
9bdbc2e2 | 572 | if (max_length == 0) { |
49aa47c7 LP |
573 | size_t len = 0, allocated = 0; |
574 | ||
9bdbc2e2 | 575 | while ((c = getc(f)) != EOF) { |
49aa47c7 LP |
576 | |
577 | if (!GREEDY_REALLOC(r, allocated, len+2)) { | |
9bdbc2e2 | 578 | free(r); |
9bdbc2e2 LN |
579 | return -ENOMEM; |
580 | } | |
49aa47c7 LP |
581 | |
582 | r[len++] = isprint(c) ? c : ' '; | |
9bdbc2e2 | 583 | } |
49aa47c7 LP |
584 | |
585 | if (len > 0) | |
586 | r[len-1] = 0; | |
587 | ||
9bdbc2e2 LN |
588 | } else { |
589 | bool space = false; | |
590 | size_t left; | |
49aa47c7 | 591 | |
9bdbc2e2 | 592 | r = new(char, max_length); |
49aa47c7 | 593 | if (!r) |
9bdbc2e2 | 594 | return -ENOMEM; |
c59760ee | 595 | |
9bdbc2e2 LN |
596 | k = r; |
597 | left = max_length; | |
598 | while ((c = getc(f)) != EOF) { | |
c59760ee | 599 | |
9bdbc2e2 LN |
600 | if (isprint(c)) { |
601 | if (space) { | |
602 | if (left <= 4) | |
603 | break; | |
604 | ||
605 | *(k++) = ' '; | |
606 | left--; | |
607 | space = false; | |
608 | } | |
c59760ee | 609 | |
c59760ee LP |
610 | if (left <= 4) |
611 | break; | |
612 | ||
9bdbc2e2 | 613 | *(k++) = (char) c; |
057fbb58 | 614 | left--; |
9bdbc2e2 LN |
615 | } else |
616 | space = true; | |
617 | } | |
c59760ee | 618 | |
9bdbc2e2 LN |
619 | if (left <= 4) { |
620 | size_t n = MIN(left-1, 3U); | |
621 | memcpy(k, "...", n); | |
622 | k[n] = 0; | |
623 | } else | |
624 | *k = 0; | |
c59760ee LP |
625 | } |
626 | ||
35d2e7ec | 627 | /* Kernel threads have no argv[] */ |
9bdbc2e2 | 628 | if (r == NULL || r[0] == 0) { |
b47d419c | 629 | _cleanup_free_ char *t = NULL; |
35d2e7ec LP |
630 | int h; |
631 | ||
632 | free(r); | |
633 | ||
87d2c1ff LP |
634 | if (!comm_fallback) |
635 | return -ENOENT; | |
636 | ||
637 | h = get_process_comm(pid, &t); | |
638 | if (h < 0) | |
35d2e7ec LP |
639 | return h; |
640 | ||
b7def684 | 641 | r = strjoin("[", t, "]", NULL); |
87d2c1ff | 642 | if (!r) |
35d2e7ec LP |
643 | return -ENOMEM; |
644 | } | |
fa776d8e | 645 | |
c59760ee LP |
646 | *line = r; |
647 | return 0; | |
648 | } | |
649 | ||
1e5678d0 | 650 | int is_kernel_thread(pid_t pid) { |
49aa47c7 | 651 | const char *p; |
1e5678d0 LP |
652 | size_t count; |
653 | char c; | |
654 | bool eof; | |
655 | FILE *f; | |
656 | ||
657 | if (pid == 0) | |
658 | return 0; | |
659 | ||
49aa47c7 | 660 | assert(pid > 0); |
1e5678d0 | 661 | |
49aa47c7 LP |
662 | p = procfs_file_alloca(pid, "cmdline"); |
663 | f = fopen(p, "re"); | |
1e5678d0 LP |
664 | if (!f) |
665 | return -errno; | |
666 | ||
667 | count = fread(&c, 1, 1, f); | |
668 | eof = feof(f); | |
669 | fclose(f); | |
670 | ||
671 | /* Kernel threads have an empty cmdline */ | |
672 | ||
673 | if (count <= 0) | |
674 | return eof ? 1 : -errno; | |
675 | ||
676 | return 0; | |
677 | } | |
678 | ||
3a832116 SL |
679 | int get_process_capeff(pid_t pid, char **capeff) { |
680 | const char *p; | |
3a832116 SL |
681 | |
682 | assert(capeff); | |
683 | assert(pid >= 0); | |
684 | ||
b68fa010 | 685 | p = procfs_file_alloca(pid, "status"); |
3a832116 | 686 | |
69ab8088 | 687 | return get_status_field(p, "\nCapEff:", capeff); |
3a832116 | 688 | } |
49aa47c7 | 689 | |
87d2c1ff | 690 | int get_process_exe(pid_t pid, char **name) { |
49aa47c7 | 691 | const char *p; |
e79f68d1 ZJS |
692 | char *d; |
693 | int r; | |
87d2c1ff | 694 | |
49aa47c7 | 695 | assert(pid >= 0); |
87d2c1ff LP |
696 | assert(name); |
697 | ||
b68fa010 | 698 | p = procfs_file_alloca(pid, "exe"); |
87d2c1ff | 699 | |
e79f68d1 ZJS |
700 | r = readlink_malloc(p, name); |
701 | if (r < 0) | |
5b12334d | 702 | return r == -ENOENT ? -ESRCH : r; |
e79f68d1 ZJS |
703 | |
704 | d = endswith(*name, " (deleted)"); | |
705 | if (d) | |
706 | *d = '\0'; | |
707 | ||
708 | return 0; | |
87d2c1ff LP |
709 | } |
710 | ||
901c3d0d | 711 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
f74e605f | 712 | _cleanup_fclose_ FILE *f = NULL; |
9db11a99 | 713 | char line[LINE_MAX]; |
49aa47c7 | 714 | const char *p; |
7e4ab3c5 | 715 | |
f74e605f | 716 | assert(field); |
7e4ab3c5 LP |
717 | assert(uid); |
718 | ||
719 | if (pid == 0) | |
720 | return getuid(); | |
721 | ||
49aa47c7 LP |
722 | p = procfs_file_alloca(pid, "status"); |
723 | f = fopen(p, "re"); | |
7e4ab3c5 LP |
724 | if (!f) |
725 | return -errno; | |
726 | ||
9db11a99 | 727 | FOREACH_LINE(line, f, return -errno) { |
f74e605f | 728 | char *l; |
7e4ab3c5 LP |
729 | |
730 | l = strstrip(line); | |
731 | ||
901c3d0d LP |
732 | if (startswith(l, field)) { |
733 | l += strlen(field); | |
7e4ab3c5 LP |
734 | l += strspn(l, WHITESPACE); |
735 | ||
736 | l[strcspn(l, WHITESPACE)] = 0; | |
737 | ||
f74e605f | 738 | return parse_uid(l, uid); |
7e4ab3c5 LP |
739 | } |
740 | } | |
741 | ||
f74e605f | 742 | return -EIO; |
7e4ab3c5 LP |
743 | } |
744 | ||
901c3d0d LP |
745 | int get_process_uid(pid_t pid, uid_t *uid) { |
746 | return get_process_id(pid, "Uid:", uid); | |
747 | } | |
748 | ||
749 | int get_process_gid(pid_t pid, gid_t *gid) { | |
49aa47c7 | 750 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); |
901c3d0d LP |
751 | return get_process_id(pid, "Gid:", gid); |
752 | } | |
753 | ||
fab56fc5 LP |
754 | char *strnappend(const char *s, const char *suffix, size_t b) { |
755 | size_t a; | |
44d8db9e LP |
756 | char *r; |
757 | ||
fab56fc5 LP |
758 | if (!s && !suffix) |
759 | return strdup(""); | |
760 | ||
761 | if (!s) | |
762 | return strndup(suffix, b); | |
763 | ||
764 | if (!suffix) | |
765 | return strdup(s); | |
766 | ||
44d8db9e LP |
767 | assert(s); |
768 | assert(suffix); | |
769 | ||
770 | a = strlen(s); | |
aa408e77 | 771 | if (b > ((size_t) -1) - a) |
040f18ea | 772 | return NULL; |
44d8db9e | 773 | |
040f18ea LP |
774 | r = new(char, a+b+1); |
775 | if (!r) | |
44d8db9e LP |
776 | return NULL; |
777 | ||
778 | memcpy(r, s, a); | |
779 | memcpy(r+a, suffix, b); | |
780 | r[a+b] = 0; | |
781 | ||
782 | return r; | |
783 | } | |
87f0e418 | 784 | |
fab56fc5 LP |
785 | char *strappend(const char *s, const char *suffix) { |
786 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
787 | } | |
788 | ||
2d2ebd6b | 789 | int readlink_malloc(const char *p, char **ret) { |
87f0e418 | 790 | size_t l = 100; |
2d2ebd6b | 791 | int r; |
87f0e418 LP |
792 | |
793 | assert(p); | |
2d2ebd6b | 794 | assert(ret); |
87f0e418 LP |
795 | |
796 | for (;;) { | |
797 | char *c; | |
798 | ssize_t n; | |
799 | ||
2d2ebd6b LP |
800 | c = new(char, l); |
801 | if (!c) | |
87f0e418 LP |
802 | return -ENOMEM; |
803 | ||
2d2ebd6b LP |
804 | n = readlink(p, c, l-1); |
805 | if (n < 0) { | |
806 | r = -errno; | |
87f0e418 | 807 | free(c); |
2d2ebd6b | 808 | return r; |
87f0e418 LP |
809 | } |
810 | ||
811 | if ((size_t) n < l-1) { | |
812 | c[n] = 0; | |
2d2ebd6b | 813 | *ret = c; |
87f0e418 LP |
814 | return 0; |
815 | } | |
816 | ||
817 | free(c); | |
818 | l *= 2; | |
819 | } | |
820 | } | |
821 | ||
2c7108c4 | 822 | int readlink_and_make_absolute(const char *p, char **r) { |
1058cbf2 ZJS |
823 | _cleanup_free_ char *target = NULL; |
824 | char *k; | |
2c7108c4 LP |
825 | int j; |
826 | ||
827 | assert(p); | |
828 | assert(r); | |
829 | ||
1058cbf2 ZJS |
830 | j = readlink_malloc(p, &target); |
831 | if (j < 0) | |
2c7108c4 LP |
832 | return j; |
833 | ||
834 | k = file_in_same_dir(p, target); | |
2c7108c4 LP |
835 | if (!k) |
836 | return -ENOMEM; | |
837 | ||
838 | *r = k; | |
839 | return 0; | |
840 | } | |
841 | ||
83096483 LP |
842 | int readlink_and_canonicalize(const char *p, char **r) { |
843 | char *t, *s; | |
844 | int j; | |
845 | ||
846 | assert(p); | |
847 | assert(r); | |
848 | ||
849 | j = readlink_and_make_absolute(p, &t); | |
850 | if (j < 0) | |
851 | return j; | |
852 | ||
853 | s = canonicalize_file_name(t); | |
854 | if (s) { | |
855 | free(t); | |
856 | *r = s; | |
857 | } else | |
858 | *r = t; | |
859 | ||
860 | path_kill_slashes(*r); | |
861 | ||
862 | return 0; | |
863 | } | |
864 | ||
2a987ee8 LP |
865 | int reset_all_signal_handlers(void) { |
866 | int sig; | |
867 | ||
868 | for (sig = 1; sig < _NSIG; sig++) { | |
b92bea5d ZJS |
869 | struct sigaction sa = { |
870 | .sa_handler = SIG_DFL, | |
871 | .sa_flags = SA_RESTART, | |
872 | }; | |
2a987ee8 LP |
873 | |
874 | if (sig == SIGKILL || sig == SIGSTOP) | |
875 | continue; | |
876 | ||
2a987ee8 LP |
877 | /* On Linux the first two RT signals are reserved by |
878 | * glibc, and sigaction() will return EINVAL for them. */ | |
879 | if ((sigaction(sig, &sa, NULL) < 0)) | |
880 | if (errno != EINVAL) | |
881 | return -errno; | |
882 | } | |
883 | ||
8e274523 | 884 | return 0; |
2a987ee8 | 885 | } |
4a72ff34 LP |
886 | |
887 | char *strstrip(char *s) { | |
57a8eca8 | 888 | char *e; |
4a72ff34 LP |
889 | |
890 | /* Drops trailing whitespace. Modifies the string in | |
891 | * place. Returns pointer to first non-space character */ | |
892 | ||
893 | s += strspn(s, WHITESPACE); | |
894 | ||
57a8eca8 LP |
895 | for (e = strchr(s, 0); e > s; e --) |
896 | if (!strchr(WHITESPACE, e[-1])) | |
897 | break; | |
4a72ff34 | 898 | |
57a8eca8 | 899 | *e = 0; |
4a72ff34 LP |
900 | |
901 | return s; | |
4a72ff34 LP |
902 | } |
903 | ||
ee9b5e01 LP |
904 | char *delete_chars(char *s, const char *bad) { |
905 | char *f, *t; | |
906 | ||
907 | /* Drops all whitespace, regardless where in the string */ | |
908 | ||
909 | for (f = s, t = s; *f; f++) { | |
910 | if (strchr(bad, *f)) | |
911 | continue; | |
912 | ||
913 | *(t++) = *f; | |
914 | } | |
915 | ||
916 | *t = 0; | |
917 | ||
918 | return s; | |
919 | } | |
920 | ||
ab1f0633 LP |
921 | bool in_charset(const char *s, const char* charset) { |
922 | const char *i; | |
923 | ||
924 | assert(s); | |
925 | assert(charset); | |
926 | ||
927 | for (i = s; *i; i++) | |
928 | if (!strchr(charset, *i)) | |
929 | return false; | |
930 | ||
931 | return true; | |
932 | } | |
933 | ||
4a72ff34 LP |
934 | char *file_in_same_dir(const char *path, const char *filename) { |
935 | char *e, *r; | |
936 | size_t k; | |
937 | ||
938 | assert(path); | |
939 | assert(filename); | |
940 | ||
941 | /* This removes the last component of path and appends | |
942 | * filename, unless the latter is absolute anyway or the | |
943 | * former isn't */ | |
944 | ||
945 | if (path_is_absolute(filename)) | |
946 | return strdup(filename); | |
947 | ||
948 | if (!(e = strrchr(path, '/'))) | |
949 | return strdup(filename); | |
950 | ||
951 | k = strlen(filename); | |
952 | if (!(r = new(char, e-path+1+k+1))) | |
953 | return NULL; | |
954 | ||
955 | memcpy(r, path, e-path+1); | |
956 | memcpy(r+(e-path)+1, filename, k+1); | |
957 | ||
958 | return r; | |
959 | } | |
fb624d04 | 960 | |
c32dd69b LP |
961 | int rmdir_parents(const char *path, const char *stop) { |
962 | size_t l; | |
963 | int r = 0; | |
964 | ||
965 | assert(path); | |
966 | assert(stop); | |
967 | ||
968 | l = strlen(path); | |
969 | ||
970 | /* Skip trailing slashes */ | |
971 | while (l > 0 && path[l-1] == '/') | |
972 | l--; | |
973 | ||
974 | while (l > 0) { | |
975 | char *t; | |
976 | ||
977 | /* Skip last component */ | |
978 | while (l > 0 && path[l-1] != '/') | |
979 | l--; | |
980 | ||
981 | /* Skip trailing slashes */ | |
982 | while (l > 0 && path[l-1] == '/') | |
983 | l--; | |
984 | ||
985 | if (l <= 0) | |
986 | break; | |
987 | ||
988 | if (!(t = strndup(path, l))) | |
989 | return -ENOMEM; | |
990 | ||
991 | if (path_startswith(stop, t)) { | |
992 | free(t); | |
993 | return 0; | |
994 | } | |
995 | ||
996 | r = rmdir(t); | |
997 | free(t); | |
998 | ||
999 | if (r < 0) | |
1000 | if (errno != ENOENT) | |
1001 | return -errno; | |
1002 | } | |
1003 | ||
1004 | return 0; | |
1005 | } | |
1006 | ||
fb624d04 LP |
1007 | char hexchar(int x) { |
1008 | static const char table[16] = "0123456789abcdef"; | |
1009 | ||
1010 | return table[x & 15]; | |
1011 | } | |
4fe88d28 LP |
1012 | |
1013 | int unhexchar(char c) { | |
1014 | ||
1015 | if (c >= '0' && c <= '9') | |
1016 | return c - '0'; | |
1017 | ||
1018 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1019 | return c - 'a' + 10; |
4fe88d28 LP |
1020 | |
1021 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1022 | return c - 'A' + 10; |
4fe88d28 LP |
1023 | |
1024 | return -1; | |
1025 | } | |
1026 | ||
66e35261 LP |
1027 | char *hexmem(const void *p, size_t l) { |
1028 | char *r, *z; | |
1029 | const uint8_t *x; | |
1030 | ||
1031 | z = r = malloc(l * 2 + 1); | |
1032 | if (!r) | |
1033 | return NULL; | |
1034 | ||
1035 | for (x = p; x < (const uint8_t*) p + l; x++) { | |
1036 | *(z++) = hexchar(*x >> 4); | |
1037 | *(z++) = hexchar(*x & 15); | |
1038 | } | |
1039 | ||
1040 | *z = 0; | |
1041 | return r; | |
1042 | } | |
1043 | ||
2181a7f5 LP |
1044 | void *unhexmem(const char *p, size_t l) { |
1045 | uint8_t *r, *z; | |
1046 | const char *x; | |
1047 | ||
1048 | assert(p); | |
1049 | ||
1050 | z = r = malloc((l + 1) / 2 + 1); | |
1051 | if (!r) | |
1052 | return NULL; | |
1053 | ||
1054 | for (x = p; x < p + l; x += 2) { | |
1055 | int a, b; | |
1056 | ||
1057 | a = unhexchar(x[0]); | |
1058 | if (x+1 < p + l) | |
1059 | b = unhexchar(x[1]); | |
1060 | else | |
1061 | b = 0; | |
1062 | ||
1063 | *(z++) = (uint8_t) a << 4 | (uint8_t) b; | |
1064 | } | |
1065 | ||
1066 | *z = 0; | |
1067 | return r; | |
1068 | } | |
1069 | ||
4fe88d28 LP |
1070 | char octchar(int x) { |
1071 | return '0' + (x & 7); | |
1072 | } | |
1073 | ||
1074 | int unoctchar(char c) { | |
1075 | ||
1076 | if (c >= '0' && c <= '7') | |
1077 | return c - '0'; | |
1078 | ||
1079 | return -1; | |
1080 | } | |
1081 | ||
5af98f82 LP |
1082 | char decchar(int x) { |
1083 | return '0' + (x % 10); | |
1084 | } | |
1085 | ||
1086 | int undecchar(char c) { | |
1087 | ||
1088 | if (c >= '0' && c <= '9') | |
1089 | return c - '0'; | |
1090 | ||
1091 | return -1; | |
1092 | } | |
1093 | ||
4fe88d28 LP |
1094 | char *cescape(const char *s) { |
1095 | char *r, *t; | |
1096 | const char *f; | |
1097 | ||
1098 | assert(s); | |
1099 | ||
1100 | /* Does C style string escaping. */ | |
1101 | ||
f8e2fb7b LP |
1102 | r = new(char, strlen(s)*4 + 1); |
1103 | if (!r) | |
4fe88d28 LP |
1104 | return NULL; |
1105 | ||
1106 | for (f = s, t = r; *f; f++) | |
1107 | ||
1108 | switch (*f) { | |
1109 | ||
1110 | case '\a': | |
1111 | *(t++) = '\\'; | |
1112 | *(t++) = 'a'; | |
1113 | break; | |
1114 | case '\b': | |
1115 | *(t++) = '\\'; | |
1116 | *(t++) = 'b'; | |
1117 | break; | |
1118 | case '\f': | |
1119 | *(t++) = '\\'; | |
1120 | *(t++) = 'f'; | |
1121 | break; | |
1122 | case '\n': | |
1123 | *(t++) = '\\'; | |
1124 | *(t++) = 'n'; | |
1125 | break; | |
1126 | case '\r': | |
1127 | *(t++) = '\\'; | |
1128 | *(t++) = 'r'; | |
1129 | break; | |
1130 | case '\t': | |
1131 | *(t++) = '\\'; | |
1132 | *(t++) = 't'; | |
1133 | break; | |
1134 | case '\v': | |
1135 | *(t++) = '\\'; | |
1136 | *(t++) = 'v'; | |
1137 | break; | |
1138 | case '\\': | |
1139 | *(t++) = '\\'; | |
1140 | *(t++) = '\\'; | |
1141 | break; | |
1142 | case '"': | |
1143 | *(t++) = '\\'; | |
1144 | *(t++) = '"'; | |
1145 | break; | |
1146 | case '\'': | |
1147 | *(t++) = '\\'; | |
1148 | *(t++) = '\''; | |
1149 | break; | |
1150 | ||
1151 | default: | |
1152 | /* For special chars we prefer octal over | |
1153 | * hexadecimal encoding, simply because glib's | |
1154 | * g_strescape() does the same */ | |
1155 | if ((*f < ' ') || (*f >= 127)) { | |
1156 | *(t++) = '\\'; | |
1157 | *(t++) = octchar((unsigned char) *f >> 6); | |
1158 | *(t++) = octchar((unsigned char) *f >> 3); | |
1159 | *(t++) = octchar((unsigned char) *f); | |
1160 | } else | |
1161 | *(t++) = *f; | |
1162 | break; | |
1163 | } | |
1164 | ||
1165 | *t = 0; | |
1166 | ||
1167 | return r; | |
1168 | } | |
1169 | ||
5b4c61cd | 1170 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1171 | char *r, *t; |
1172 | const char *f; | |
5b4c61cd | 1173 | size_t pl; |
4fe88d28 LP |
1174 | |
1175 | assert(s); | |
1176 | ||
5b4c61cd LP |
1177 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1178 | ||
1179 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1180 | |
5b4c61cd | 1181 | r = new(char, pl+length+1); |
7f110ff9 | 1182 | if (!r) |
4fe88d28 LP |
1183 | return r; |
1184 | ||
5b4c61cd LP |
1185 | if (prefix) |
1186 | memcpy(r, prefix, pl); | |
1187 | ||
1188 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1189 | |
1190 | if (*f != '\\') { | |
1191 | *(t++) = *f; | |
1192 | continue; | |
1193 | } | |
1194 | ||
1195 | f++; | |
1196 | ||
1197 | switch (*f) { | |
1198 | ||
1199 | case 'a': | |
1200 | *(t++) = '\a'; | |
1201 | break; | |
1202 | case 'b': | |
1203 | *(t++) = '\b'; | |
1204 | break; | |
1205 | case 'f': | |
1206 | *(t++) = '\f'; | |
1207 | break; | |
1208 | case 'n': | |
1209 | *(t++) = '\n'; | |
1210 | break; | |
1211 | case 'r': | |
1212 | *(t++) = '\r'; | |
1213 | break; | |
1214 | case 't': | |
1215 | *(t++) = '\t'; | |
1216 | break; | |
1217 | case 'v': | |
1218 | *(t++) = '\v'; | |
1219 | break; | |
1220 | case '\\': | |
1221 | *(t++) = '\\'; | |
1222 | break; | |
1223 | case '"': | |
1224 | *(t++) = '"'; | |
1225 | break; | |
1226 | case '\'': | |
1227 | *(t++) = '\''; | |
1228 | break; | |
1229 | ||
e167fb86 LP |
1230 | case 's': |
1231 | /* This is an extension of the XDG syntax files */ | |
1232 | *(t++) = ' '; | |
1233 | break; | |
1234 | ||
4fe88d28 LP |
1235 | case 'x': { |
1236 | /* hexadecimal encoding */ | |
1237 | int a, b; | |
1238 | ||
7f110ff9 LP |
1239 | a = unhexchar(f[1]); |
1240 | b = unhexchar(f[2]); | |
1241 | ||
1242 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1243 | /* Invalid escape code, let's take it literal then */ |
1244 | *(t++) = '\\'; | |
1245 | *(t++) = 'x'; | |
1246 | } else { | |
1247 | *(t++) = (char) ((a << 4) | b); | |
1248 | f += 2; | |
1249 | } | |
1250 | ||
1251 | break; | |
1252 | } | |
1253 | ||
1254 | case '0': | |
1255 | case '1': | |
1256 | case '2': | |
1257 | case '3': | |
1258 | case '4': | |
1259 | case '5': | |
1260 | case '6': | |
1261 | case '7': { | |
1262 | /* octal encoding */ | |
1263 | int a, b, c; | |
1264 | ||
7f110ff9 LP |
1265 | a = unoctchar(f[0]); |
1266 | b = unoctchar(f[1]); | |
1267 | c = unoctchar(f[2]); | |
1268 | ||
1269 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1270 | /* Invalid escape code, let's take it literal then */ |
1271 | *(t++) = '\\'; | |
1272 | *(t++) = f[0]; | |
1273 | } else { | |
1274 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1275 | f += 2; | |
1276 | } | |
1277 | ||
1278 | break; | |
1279 | } | |
1280 | ||
1281 | case 0: | |
1282 | /* premature end of string.*/ | |
1283 | *(t++) = '\\'; | |
1284 | goto finish; | |
1285 | ||
1286 | default: | |
1287 | /* Invalid escape code, let's take it literal then */ | |
1288 | *(t++) = '\\'; | |
f3d4cc01 | 1289 | *(t++) = *f; |
4fe88d28 LP |
1290 | break; |
1291 | } | |
1292 | } | |
1293 | ||
1294 | finish: | |
1295 | *t = 0; | |
1296 | return r; | |
1297 | } | |
1298 | ||
5b4c61cd LP |
1299 | char *cunescape_length(const char *s, size_t length) { |
1300 | return cunescape_length_with_prefix(s, length, NULL); | |
1301 | } | |
1302 | ||
6febfd0d | 1303 | char *cunescape(const char *s) { |
5b4c61cd LP |
1304 | assert(s); |
1305 | ||
6febfd0d LP |
1306 | return cunescape_length(s, strlen(s)); |
1307 | } | |
4fe88d28 LP |
1308 | |
1309 | char *xescape(const char *s, const char *bad) { | |
1310 | char *r, *t; | |
1311 | const char *f; | |
1312 | ||
1313 | /* Escapes all chars in bad, in addition to \ and all special | |
1314 | * chars, in \xFF style escaping. May be reversed with | |
1315 | * cunescape. */ | |
1316 | ||
08ace05b LP |
1317 | r = new(char, strlen(s) * 4 + 1); |
1318 | if (!r) | |
4fe88d28 LP |
1319 | return NULL; |
1320 | ||
1321 | for (f = s, t = r; *f; f++) { | |
1322 | ||
b866264a LP |
1323 | if ((*f < ' ') || (*f >= 127) || |
1324 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1325 | *(t++) = '\\'; |
1326 | *(t++) = 'x'; | |
1327 | *(t++) = hexchar(*f >> 4); | |
1328 | *(t++) = hexchar(*f); | |
1329 | } else | |
1330 | *(t++) = *f; | |
1331 | } | |
1332 | ||
1333 | *t = 0; | |
1334 | ||
1335 | return r; | |
1336 | } | |
1337 | ||
67d51650 | 1338 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1339 | char *p; |
1340 | ||
67d51650 | 1341 | assert(t); |
4fe88d28 | 1342 | |
67d51650 | 1343 | for (p = t; *p; p++) |
4fe88d28 LP |
1344 | if (*p >= 'A' && *p <= 'Z') |
1345 | *p = *p - 'A' + 'a'; | |
1346 | ||
67d51650 | 1347 | return t; |
4fe88d28 | 1348 | } |
1dccbe19 | 1349 | |
44a6b1b6 | 1350 | _pure_ static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1351 | assert(filename); |
1352 | ||
1353 | return | |
1354 | filename[0] == '.' || | |
6c78be3c | 1355 | streq(filename, "lost+found") || |
e472d476 LP |
1356 | streq(filename, "aquota.user") || |
1357 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1358 | endswith(filename, ".rpmnew") || |
1359 | endswith(filename, ".rpmsave") || | |
1360 | endswith(filename, ".rpmorig") || | |
1361 | endswith(filename, ".dpkg-old") || | |
1362 | endswith(filename, ".dpkg-new") || | |
1363 | endswith(filename, ".swp"); | |
1364 | } | |
1365 | ||
a228a22f LP |
1366 | bool ignore_file(const char *filename) { |
1367 | assert(filename); | |
1368 | ||
1369 | if (endswith(filename, "~")) | |
1370 | return false; | |
1371 | ||
1372 | return ignore_file_allow_backup(filename); | |
1373 | } | |
1374 | ||
3a0ecb08 LP |
1375 | int fd_nonblock(int fd, bool nonblock) { |
1376 | int flags; | |
1377 | ||
1378 | assert(fd >= 0); | |
1379 | ||
1380 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1381 | return -errno; | |
1382 | ||
1383 | if (nonblock) | |
1384 | flags |= O_NONBLOCK; | |
1385 | else | |
1386 | flags &= ~O_NONBLOCK; | |
1387 | ||
1388 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1389 | return -errno; | |
1390 | ||
1391 | return 0; | |
1392 | } | |
1393 | ||
1394 | int fd_cloexec(int fd, bool cloexec) { | |
1395 | int flags; | |
1396 | ||
1397 | assert(fd >= 0); | |
1398 | ||
1399 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1400 | return -errno; | |
1401 | ||
1402 | if (cloexec) | |
1403 | flags |= FD_CLOEXEC; | |
1404 | else | |
1405 | flags &= ~FD_CLOEXEC; | |
1406 | ||
1407 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1408 | return -errno; | |
1409 | ||
1410 | return 0; | |
1411 | } | |
1412 | ||
44a6b1b6 | 1413 | _pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
b19be9eb LP |
1414 | unsigned i; |
1415 | ||
1416 | assert(n_fdset == 0 || fdset); | |
1417 | ||
1418 | for (i = 0; i < n_fdset; i++) | |
1419 | if (fdset[i] == fd) | |
1420 | return true; | |
1421 | ||
1422 | return false; | |
1423 | } | |
1424 | ||
a0d40ac5 LP |
1425 | int close_all_fds(const int except[], unsigned n_except) { |
1426 | DIR *d; | |
1427 | struct dirent *de; | |
1428 | int r = 0; | |
1429 | ||
b19be9eb LP |
1430 | assert(n_except == 0 || except); |
1431 | ||
1432 | d = opendir("/proc/self/fd"); | |
1433 | if (!d) { | |
1434 | int fd; | |
1435 | struct rlimit rl; | |
1436 | ||
1437 | /* When /proc isn't available (for example in chroots) | |
1438 | * the fallback is brute forcing through the fd | |
1439 | * table */ | |
1440 | ||
1441 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1442 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1443 | ||
1444 | if (fd_in_set(fd, except, n_except)) | |
1445 | continue; | |
1446 | ||
1447 | if (close_nointr(fd) < 0) | |
1448 | if (errno != EBADF && r == 0) | |
1449 | r = -errno; | |
1450 | } | |
1451 | ||
1452 | return r; | |
1453 | } | |
a0d40ac5 LP |
1454 | |
1455 | while ((de = readdir(d))) { | |
a7610064 | 1456 | int fd = -1; |
a0d40ac5 | 1457 | |
a16e1123 | 1458 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1459 | continue; |
1460 | ||
720ce21d LP |
1461 | if (safe_atoi(de->d_name, &fd) < 0) |
1462 | /* Let's better ignore this, just in case */ | |
1463 | continue; | |
a0d40ac5 LP |
1464 | |
1465 | if (fd < 3) | |
1466 | continue; | |
1467 | ||
1468 | if (fd == dirfd(d)) | |
1469 | continue; | |
1470 | ||
b19be9eb LP |
1471 | if (fd_in_set(fd, except, n_except)) |
1472 | continue; | |
a0d40ac5 | 1473 | |
720ce21d | 1474 | if (close_nointr(fd) < 0) { |
2f357920 | 1475 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1476 | if (errno != EBADF && r == 0) |
1477 | r = -errno; | |
2f357920 | 1478 | } |
a0d40ac5 LP |
1479 | } |
1480 | ||
a0d40ac5 LP |
1481 | closedir(d); |
1482 | return r; | |
1483 | } | |
1484 | ||
db12775d LP |
1485 | bool chars_intersect(const char *a, const char *b) { |
1486 | const char *p; | |
1487 | ||
1488 | /* Returns true if any of the chars in a are in b. */ | |
1489 | for (p = a; *p; p++) | |
1490 | if (strchr(b, *p)) | |
1491 | return true; | |
1492 | ||
1493 | return false; | |
1494 | } | |
1495 | ||
42856c10 | 1496 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
1497 | static const char table[] = |
1498 | "cifs\0" | |
1499 | "smbfs\0" | |
1500 | "ncpfs\0" | |
dac70dc7 | 1501 | "ncp\0" |
a05f97b3 LP |
1502 | "nfs\0" |
1503 | "nfs4\0" | |
1504 | "gfs\0" | |
73836c5c | 1505 | "gfs2\0"; |
42856c10 | 1506 | |
a05f97b3 | 1507 | return nulstr_contains(table, fstype); |
42856c10 LP |
1508 | } |
1509 | ||
601f6a1e | 1510 | int chvt(int vt) { |
a05f97b3 | 1511 | _cleanup_close_ int fd; |
601f6a1e | 1512 | |
a05f97b3 LP |
1513 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1514 | if (fd < 0) | |
601f6a1e LP |
1515 | return -errno; |
1516 | ||
1517 | if (vt < 0) { | |
1518 | int tiocl[2] = { | |
1519 | TIOCL_GETKMSGREDIRECT, | |
1520 | 0 | |
1521 | }; | |
1522 | ||
a05f97b3 LP |
1523 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1524 | return -errno; | |
601f6a1e LP |
1525 | |
1526 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1527 | } | |
1528 | ||
1529 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1530 | return -errno; |
601f6a1e | 1531 | |
a05f97b3 | 1532 | return 0; |
601f6a1e LP |
1533 | } |
1534 | ||
8f2d43a0 | 1535 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
1536 | struct termios old_termios, new_termios; |
1537 | char c; | |
20c03b7b | 1538 | char line[LINE_MAX]; |
80876c20 LP |
1539 | |
1540 | assert(f); | |
1541 | assert(ret); | |
1542 | ||
1543 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1544 | new_termios = old_termios; | |
1545 | ||
1546 | new_termios.c_lflag &= ~ICANON; | |
1547 | new_termios.c_cc[VMIN] = 1; | |
1548 | new_termios.c_cc[VTIME] = 0; | |
1549 | ||
1550 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1551 | size_t k; | |
1552 | ||
8f2d43a0 LP |
1553 | if (t != (usec_t) -1) { |
1554 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
1555 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1556 | return -ETIMEDOUT; | |
1557 | } | |
1558 | } | |
1559 | ||
80876c20 LP |
1560 | k = fread(&c, 1, 1, f); |
1561 | ||
1562 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1563 | ||
1564 | if (k <= 0) | |
1565 | return -EIO; | |
1566 | ||
1567 | if (need_nl) | |
1568 | *need_nl = c != '\n'; | |
1569 | ||
1570 | *ret = c; | |
1571 | return 0; | |
1572 | } | |
1573 | } | |
1574 | ||
8f2d43a0 LP |
1575 | if (t != (usec_t) -1) |
1576 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
1577 | return -ETIMEDOUT; | |
1578 | ||
1579 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
1580 | return -EIO; |
1581 | ||
1582 | truncate_nl(line); | |
1583 | ||
1584 | if (strlen(line) != 1) | |
1585 | return -EBADMSG; | |
1586 | ||
1587 | if (need_nl) | |
1588 | *need_nl = false; | |
1589 | ||
1590 | *ret = line[0]; | |
1591 | return 0; | |
1592 | } | |
1593 | ||
1594 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 | 1595 | |
80876c20 LP |
1596 | assert(ret); |
1597 | assert(replies); | |
1598 | assert(text); | |
1599 | ||
1600 | for (;;) { | |
1601 | va_list ap; | |
1602 | char c; | |
1603 | int r; | |
1604 | bool need_nl = true; | |
1605 | ||
8481248b | 1606 | if (on_tty()) |
c1072ea0 | 1607 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1608 | |
80876c20 LP |
1609 | va_start(ap, text); |
1610 | vprintf(text, ap); | |
1611 | va_end(ap); | |
1612 | ||
8481248b | 1613 | if (on_tty()) |
c1072ea0 | 1614 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1615 | |
80876c20 LP |
1616 | fflush(stdout); |
1617 | ||
8f2d43a0 LP |
1618 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
1619 | if (r < 0) { | |
80876c20 LP |
1620 | |
1621 | if (r == -EBADMSG) { | |
1622 | puts("Bad input, please try again."); | |
1623 | continue; | |
1624 | } | |
1625 | ||
1626 | putchar('\n'); | |
1627 | return r; | |
1628 | } | |
1629 | ||
1630 | if (need_nl) | |
1631 | putchar('\n'); | |
1632 | ||
1633 | if (strchr(replies, c)) { | |
1634 | *ret = c; | |
1635 | return 0; | |
1636 | } | |
1637 | ||
1638 | puts("Read unexpected character, please try again."); | |
1639 | } | |
1640 | } | |
1641 | ||
512947d4 | 1642 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
1643 | struct termios termios; |
1644 | int r = 0; | |
3fe5e5d4 LP |
1645 | |
1646 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
1647 | |
1648 | assert(fd >= 0); | |
1649 | ||
eed1d0e3 LP |
1650 | /* We leave locked terminal attributes untouched, so that |
1651 | * Plymouth may set whatever it wants to set, and we don't | |
1652 | * interfere with that. */ | |
3fe5e5d4 LP |
1653 | |
1654 | /* Disable exclusive mode, just in case */ | |
1655 | ioctl(fd, TIOCNXCL); | |
1656 | ||
5c0100a5 | 1657 | /* Switch to text mode */ |
512947d4 MS |
1658 | if (switch_to_text) |
1659 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 1660 | |
3fe5e5d4 | 1661 | /* Enable console unicode mode */ |
df465b3f | 1662 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
1663 | |
1664 | if (tcgetattr(fd, &termios) < 0) { | |
1665 | r = -errno; | |
1666 | goto finish; | |
1667 | } | |
1668 | ||
aaf694ca LP |
1669 | /* We only reset the stuff that matters to the software. How |
1670 | * hardware is set up we don't touch assuming that somebody | |
1671 | * else will do that for us */ | |
1672 | ||
1673 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
1674 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
1675 | termios.c_oflag |= ONLCR; | |
1676 | termios.c_cflag |= CREAD; | |
1677 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
1678 | ||
1679 | termios.c_cc[VINTR] = 03; /* ^C */ | |
1680 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
1681 | termios.c_cc[VERASE] = 0177; | |
1682 | termios.c_cc[VKILL] = 025; /* ^X */ | |
1683 | termios.c_cc[VEOF] = 04; /* ^D */ | |
1684 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
1685 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
1686 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
1687 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
1688 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
1689 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
1690 | termios.c_cc[VEOL] = 0; |
1691 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
1692 | |
1693 | termios.c_cc[VTIME] = 0; | |
1694 | termios.c_cc[VMIN] = 1; | |
1695 | ||
1696 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
1697 | r = -errno; | |
1698 | ||
1699 | finish: | |
1700 | /* Just in case, flush all crap out */ | |
1701 | tcflush(fd, TCIOFLUSH); | |
1702 | ||
1703 | return r; | |
1704 | } | |
1705 | ||
6ea832a2 LP |
1706 | int reset_terminal(const char *name) { |
1707 | int fd, r; | |
1708 | ||
1709 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
1710 | if (fd < 0) | |
1711 | return fd; | |
1712 | ||
512947d4 | 1713 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
1714 | close_nointr_nofail(fd); |
1715 | ||
1716 | return r; | |
1717 | } | |
1718 | ||
80876c20 LP |
1719 | int open_terminal(const char *name, int mode) { |
1720 | int fd, r; | |
f73f76ac | 1721 | unsigned c = 0; |
80876c20 | 1722 | |
f73f76ac LP |
1723 | /* |
1724 | * If a TTY is in the process of being closed opening it might | |
1725 | * cause EIO. This is horribly awful, but unlikely to be | |
1726 | * changed in the kernel. Hence we work around this problem by | |
1727 | * retrying a couple of times. | |
1728 | * | |
1729 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
1730 | */ | |
1731 | ||
dd94c17e LP |
1732 | assert(!(mode & O_CREAT)); |
1733 | ||
f73f76ac | 1734 | for (;;) { |
dd94c17e | 1735 | fd = open(name, mode, 0); |
af6da548 | 1736 | if (fd >= 0) |
f73f76ac LP |
1737 | break; |
1738 | ||
1739 | if (errno != EIO) | |
1740 | return -errno; | |
1741 | ||
af6da548 | 1742 | /* Max 1s in total */ |
f73f76ac LP |
1743 | if (c >= 20) |
1744 | return -errno; | |
1745 | ||
1746 | usleep(50 * USEC_PER_MSEC); | |
1747 | c++; | |
1748 | } | |
1749 | ||
1750 | if (fd < 0) | |
80876c20 LP |
1751 | return -errno; |
1752 | ||
af6da548 LP |
1753 | r = isatty(fd); |
1754 | if (r < 0) { | |
80876c20 LP |
1755 | close_nointr_nofail(fd); |
1756 | return -errno; | |
1757 | } | |
1758 | ||
1759 | if (!r) { | |
1760 | close_nointr_nofail(fd); | |
1761 | return -ENOTTY; | |
1762 | } | |
1763 | ||
1764 | return fd; | |
1765 | } | |
1766 | ||
1767 | int flush_fd(int fd) { | |
b92bea5d ZJS |
1768 | struct pollfd pollfd = { |
1769 | .fd = fd, | |
1770 | .events = POLLIN, | |
1771 | }; | |
80876c20 LP |
1772 | |
1773 | for (;;) { | |
20c03b7b | 1774 | char buf[LINE_MAX]; |
80876c20 LP |
1775 | ssize_t l; |
1776 | int r; | |
1777 | ||
e62d8c39 ZJS |
1778 | r = poll(&pollfd, 1, 0); |
1779 | if (r < 0) { | |
80876c20 LP |
1780 | if (errno == EINTR) |
1781 | continue; | |
1782 | ||
1783 | return -errno; | |
80876c20 | 1784 | |
e62d8c39 | 1785 | } else if (r == 0) |
80876c20 LP |
1786 | return 0; |
1787 | ||
e62d8c39 ZJS |
1788 | l = read(fd, buf, sizeof(buf)); |
1789 | if (l < 0) { | |
80876c20 LP |
1790 | |
1791 | if (errno == EINTR) | |
1792 | continue; | |
1793 | ||
1794 | if (errno == EAGAIN) | |
1795 | return 0; | |
1796 | ||
1797 | return -errno; | |
e62d8c39 | 1798 | } else if (l == 0) |
80876c20 LP |
1799 | return 0; |
1800 | } | |
1801 | } | |
1802 | ||
af6da548 LP |
1803 | int acquire_terminal( |
1804 | const char *name, | |
1805 | bool fail, | |
1806 | bool force, | |
1807 | bool ignore_tiocstty_eperm, | |
1808 | usec_t timeout) { | |
1809 | ||
4a0ff478 | 1810 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 1811 | usec_t ts = 0; |
80876c20 LP |
1812 | |
1813 | assert(name); | |
1814 | ||
1815 | /* We use inotify to be notified when the tty is closed. We | |
1816 | * create the watch before checking if we can actually acquire | |
1817 | * it, so that we don't lose any event. | |
1818 | * | |
1819 | * Note: strictly speaking this actually watches for the | |
1820 | * device being closed, it does *not* really watch whether a | |
1821 | * tty loses its controlling process. However, unless some | |
1822 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
1823 | * its tty otherwise this will not become a problem. As long | |
1824 | * as the administrator makes sure not configure any service | |
1825 | * on the same tty as an untrusted user this should not be a | |
1826 | * problem. (Which he probably should not do anyway.) */ | |
1827 | ||
af6da548 LP |
1828 | if (timeout != (usec_t) -1) |
1829 | ts = now(CLOCK_MONOTONIC); | |
1830 | ||
80876c20 | 1831 | if (!fail && !force) { |
af6da548 LP |
1832 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
1833 | if (notify < 0) { | |
80876c20 LP |
1834 | r = -errno; |
1835 | goto fail; | |
1836 | } | |
1837 | ||
af6da548 LP |
1838 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
1839 | if (wd < 0) { | |
80876c20 LP |
1840 | r = -errno; |
1841 | goto fail; | |
1842 | } | |
1843 | } | |
1844 | ||
1845 | for (;;) { | |
b92bea5d ZJS |
1846 | struct sigaction sa_old, sa_new = { |
1847 | .sa_handler = SIG_IGN, | |
1848 | .sa_flags = SA_RESTART, | |
1849 | }; | |
1850 | ||
af6da548 LP |
1851 | if (notify >= 0) { |
1852 | r = flush_fd(notify); | |
1853 | if (r < 0) | |
e3d1855b | 1854 | goto fail; |
af6da548 | 1855 | } |
80876c20 LP |
1856 | |
1857 | /* We pass here O_NOCTTY only so that we can check the return | |
1858 | * value TIOCSCTTY and have a reliable way to figure out if we | |
1859 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
1860 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
1861 | if (fd < 0) | |
6ea832a2 | 1862 | return fd; |
80876c20 | 1863 | |
32c4bef8 LP |
1864 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1865 | * if we already own the tty. */ | |
32c4bef8 LP |
1866 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
1867 | ||
80876c20 | 1868 | /* First, try to get the tty */ |
32c4bef8 LP |
1869 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
1870 | r = -errno; | |
1871 | ||
1872 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
1873 | |
1874 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
1875 | * returning EPERM, i.e. when very likely we already | |
1876 | * are have this controlling terminal. */ | |
32c4bef8 | 1877 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
1878 | r = 0; |
1879 | ||
32c4bef8 | 1880 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
1881 | goto fail; |
1882 | } | |
1883 | ||
1884 | if (r >= 0) | |
1885 | break; | |
1886 | ||
1887 | assert(!fail); | |
1888 | assert(!force); | |
1889 | assert(notify >= 0); | |
1890 | ||
1891 | for (;;) { | |
f601daa7 | 1892 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 1893 | ssize_t l; |
f601daa7 | 1894 | struct inotify_event *e; |
80876c20 | 1895 | |
af6da548 LP |
1896 | if (timeout != (usec_t) -1) { |
1897 | usec_t n; | |
1898 | ||
1899 | n = now(CLOCK_MONOTONIC); | |
1900 | if (ts + timeout < n) { | |
1901 | r = -ETIMEDOUT; | |
1902 | goto fail; | |
1903 | } | |
1904 | ||
1905 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
1906 | if (r < 0) | |
1907 | goto fail; | |
1908 | ||
1909 | if (r == 0) { | |
1910 | r = -ETIMEDOUT; | |
1911 | goto fail; | |
1912 | } | |
1913 | } | |
1914 | ||
1915 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
1916 | if (l < 0) { | |
80876c20 | 1917 | |
af6da548 | 1918 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
1919 | continue; |
1920 | ||
1921 | r = -errno; | |
1922 | goto fail; | |
1923 | } | |
1924 | ||
1925 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 1926 | |
f601daa7 LP |
1927 | while (l > 0) { |
1928 | size_t step; | |
80876c20 | 1929 | |
f601daa7 | 1930 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 1931 | r = -EIO; |
f601daa7 LP |
1932 | goto fail; |
1933 | } | |
80876c20 | 1934 | |
f601daa7 LP |
1935 | step = sizeof(struct inotify_event) + e->len; |
1936 | assert(step <= (size_t) l); | |
80876c20 | 1937 | |
f601daa7 LP |
1938 | e = (struct inotify_event*) ((uint8_t*) e + step); |
1939 | l -= step; | |
80876c20 LP |
1940 | } |
1941 | ||
1942 | break; | |
1943 | } | |
1944 | ||
1945 | /* We close the tty fd here since if the old session | |
1946 | * ended our handle will be dead. It's important that | |
1947 | * we do this after sleeping, so that we don't enter | |
1948 | * an endless loop. */ | |
1949 | close_nointr_nofail(fd); | |
1950 | } | |
1951 | ||
1952 | if (notify >= 0) | |
a16e1123 | 1953 | close_nointr_nofail(notify); |
80876c20 | 1954 | |
512947d4 MS |
1955 | r = reset_terminal_fd(fd, true); |
1956 | if (r < 0) | |
80876c20 LP |
1957 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
1958 | ||
1959 | return fd; | |
1960 | ||
1961 | fail: | |
1962 | if (fd >= 0) | |
a16e1123 | 1963 | close_nointr_nofail(fd); |
80876c20 LP |
1964 | |
1965 | if (notify >= 0) | |
a16e1123 | 1966 | close_nointr_nofail(notify); |
80876c20 LP |
1967 | |
1968 | return r; | |
1969 | } | |
1970 | ||
1971 | int release_terminal(void) { | |
e62d8c39 | 1972 | int r = 0; |
b92bea5d ZJS |
1973 | struct sigaction sa_old, sa_new = { |
1974 | .sa_handler = SIG_IGN, | |
1975 | .sa_flags = SA_RESTART, | |
1976 | }; | |
7fd1b19b | 1977 | _cleanup_close_ int fd; |
80876c20 | 1978 | |
e62d8c39 ZJS |
1979 | fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC); |
1980 | if (fd < 0) | |
80876c20 LP |
1981 | return -errno; |
1982 | ||
57cd2192 LP |
1983 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1984 | * by our own TIOCNOTTY */ | |
57cd2192 LP |
1985 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
1986 | ||
80876c20 LP |
1987 | if (ioctl(fd, TIOCNOTTY) < 0) |
1988 | r = -errno; | |
1989 | ||
57cd2192 LP |
1990 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
1991 | ||
80876c20 LP |
1992 | return r; |
1993 | } | |
1994 | ||
9a34ec5f LP |
1995 | int sigaction_many(const struct sigaction *sa, ...) { |
1996 | va_list ap; | |
1997 | int r = 0, sig; | |
1998 | ||
1999 | va_start(ap, sa); | |
2000 | while ((sig = va_arg(ap, int)) > 0) | |
2001 | if (sigaction(sig, sa, NULL) < 0) | |
2002 | r = -errno; | |
2003 | va_end(ap); | |
2004 | ||
2005 | return r; | |
2006 | } | |
2007 | ||
2008 | int ignore_signals(int sig, ...) { | |
b92bea5d ZJS |
2009 | struct sigaction sa = { |
2010 | .sa_handler = SIG_IGN, | |
2011 | .sa_flags = SA_RESTART, | |
2012 | }; | |
9a34ec5f LP |
2013 | va_list ap; |
2014 | int r = 0; | |
a337c6fc | 2015 | |
a337c6fc | 2016 | |
9a34ec5f LP |
2017 | if (sigaction(sig, &sa, NULL) < 0) |
2018 | r = -errno; | |
2019 | ||
2020 | va_start(ap, sig); | |
2021 | while ((sig = va_arg(ap, int)) > 0) | |
2022 | if (sigaction(sig, &sa, NULL) < 0) | |
2023 | r = -errno; | |
2024 | va_end(ap); | |
2025 | ||
2026 | return r; | |
2027 | } | |
2028 | ||
2029 | int default_signals(int sig, ...) { | |
b92bea5d ZJS |
2030 | struct sigaction sa = { |
2031 | .sa_handler = SIG_DFL, | |
2032 | .sa_flags = SA_RESTART, | |
2033 | }; | |
9a34ec5f LP |
2034 | va_list ap; |
2035 | int r = 0; | |
2036 | ||
9a34ec5f LP |
2037 | if (sigaction(sig, &sa, NULL) < 0) |
2038 | r = -errno; | |
2039 | ||
2040 | va_start(ap, sig); | |
2041 | while ((sig = va_arg(ap, int)) > 0) | |
2042 | if (sigaction(sig, &sa, NULL) < 0) | |
2043 | r = -errno; | |
2044 | va_end(ap); | |
2045 | ||
2046 | return r; | |
a337c6fc LP |
2047 | } |
2048 | ||
8d567588 LP |
2049 | int close_pipe(int p[]) { |
2050 | int a = 0, b = 0; | |
2051 | ||
2052 | assert(p); | |
2053 | ||
2054 | if (p[0] >= 0) { | |
2055 | a = close_nointr(p[0]); | |
2056 | p[0] = -1; | |
2057 | } | |
2058 | ||
2059 | if (p[1] >= 0) { | |
2060 | b = close_nointr(p[1]); | |
2061 | p[1] = -1; | |
2062 | } | |
2063 | ||
2064 | return a < 0 ? a : b; | |
2065 | } | |
2066 | ||
eb22ac37 | 2067 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2068 | uint8_t *p = buf; |
8d567588 LP |
2069 | ssize_t n = 0; |
2070 | ||
2071 | assert(fd >= 0); | |
2072 | assert(buf); | |
2073 | ||
8d567588 LP |
2074 | while (nbytes > 0) { |
2075 | ssize_t k; | |
2076 | ||
7d5dd5e0 LP |
2077 | k = read(fd, p, nbytes); |
2078 | if (k < 0 && errno == EINTR) | |
2079 | continue; | |
8d567588 | 2080 | |
7d5dd5e0 | 2081 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 | 2082 | |
7d5dd5e0 LP |
2083 | /* We knowingly ignore any return value here, |
2084 | * and expect that any error/EOF is reported | |
2085 | * via read() */ | |
8d567588 | 2086 | |
7d5dd5e0 LP |
2087 | fd_wait_for_event(fd, POLLIN, (usec_t) -1); |
2088 | continue; | |
2089 | } | |
8d567588 | 2090 | |
7d5dd5e0 | 2091 | if (k <= 0) |
8d567588 | 2092 | return n > 0 ? n : (k < 0 ? -errno : 0); |
8d567588 LP |
2093 | |
2094 | p += k; | |
2095 | nbytes -= k; | |
2096 | n += k; | |
2097 | } | |
2098 | ||
2099 | return n; | |
2100 | } | |
2101 | ||
eb22ac37 | 2102 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2103 | const uint8_t *p = buf; |
eb22ac37 LP |
2104 | ssize_t n = 0; |
2105 | ||
2106 | assert(fd >= 0); | |
2107 | assert(buf); | |
2108 | ||
eb22ac37 LP |
2109 | while (nbytes > 0) { |
2110 | ssize_t k; | |
2111 | ||
fe652127 | 2112 | k = write(fd, p, nbytes); |
7d5dd5e0 LP |
2113 | if (k < 0 && errno == EINTR) |
2114 | continue; | |
eb22ac37 | 2115 | |
7d5dd5e0 | 2116 | if (k < 0 && errno == EAGAIN && do_poll) { |
eb22ac37 | 2117 | |
7d5dd5e0 LP |
2118 | /* We knowingly ignore any return value here, |
2119 | * and expect that any error/EOF is reported | |
2120 | * via write() */ | |
eb22ac37 | 2121 | |
7d5dd5e0 LP |
2122 | fd_wait_for_event(fd, POLLOUT, (usec_t) -1); |
2123 | continue; | |
2124 | } | |
eb22ac37 | 2125 | |
7d5dd5e0 | 2126 | if (k <= 0) |
eb22ac37 | 2127 | return n > 0 ? n : (k < 0 ? -errno : 0); |
eb22ac37 LP |
2128 | |
2129 | p += k; | |
2130 | nbytes -= k; | |
2131 | n += k; | |
2132 | } | |
2133 | ||
2134 | return n; | |
2135 | } | |
2136 | ||
ab1f0633 LP |
2137 | int parse_bytes(const char *t, off_t *bytes) { |
2138 | static const struct { | |
2139 | const char *suffix; | |
b32ff512 | 2140 | unsigned long long factor; |
ab1f0633 LP |
2141 | } table[] = { |
2142 | { "B", 1 }, | |
2143 | { "K", 1024ULL }, | |
2144 | { "M", 1024ULL*1024ULL }, | |
2145 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2146 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2147 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2148 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2149 | { "", 1 }, |
2150 | }; | |
2151 | ||
2152 | const char *p; | |
b32ff512 | 2153 | unsigned long long r = 0; |
ab1f0633 LP |
2154 | |
2155 | assert(t); | |
2156 | assert(bytes); | |
2157 | ||
2158 | p = t; | |
2159 | do { | |
2160 | long long l; | |
2161 | char *e; | |
2162 | unsigned i; | |
2163 | ||
2164 | errno = 0; | |
2165 | l = strtoll(p, &e, 10); | |
2166 | ||
8333c77e | 2167 | if (errno > 0) |
ab1f0633 LP |
2168 | return -errno; |
2169 | ||
2170 | if (l < 0) | |
2171 | return -ERANGE; | |
2172 | ||
2173 | if (e == p) | |
2174 | return -EINVAL; | |
2175 | ||
2176 | e += strspn(e, WHITESPACE); | |
2177 | ||
2178 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2179 | if (startswith(e, table[i].suffix)) { | |
b32ff512 ZJS |
2180 | unsigned long long tmp; |
2181 | if ((unsigned long long) l > ULLONG_MAX / table[i].factor) | |
2182 | return -ERANGE; | |
2183 | tmp = l * table[i].factor; | |
2184 | if (tmp > ULLONG_MAX - r) | |
2185 | return -ERANGE; | |
2186 | ||
2187 | r += tmp; | |
2188 | if ((unsigned long long) (off_t) r != r) | |
2189 | return -ERANGE; | |
2190 | ||
ab1f0633 LP |
2191 | p = e + strlen(table[i].suffix); |
2192 | break; | |
2193 | } | |
2194 | ||
2195 | if (i >= ELEMENTSOF(table)) | |
2196 | return -EINVAL; | |
2197 | ||
b32ff512 | 2198 | } while (*p); |
ab1f0633 LP |
2199 | |
2200 | *bytes = r; | |
2201 | ||
2202 | return 0; | |
2203 | } | |
2204 | ||
843d2643 LP |
2205 | int make_stdio(int fd) { |
2206 | int r, s, t; | |
2207 | ||
2208 | assert(fd >= 0); | |
2209 | ||
73836c5c LP |
2210 | r = dup3(fd, STDIN_FILENO, 0); |
2211 | s = dup3(fd, STDOUT_FILENO, 0); | |
2212 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2213 | |
2214 | if (fd >= 3) | |
2215 | close_nointr_nofail(fd); | |
2216 | ||
2217 | if (r < 0 || s < 0 || t < 0) | |
2218 | return -errno; | |
2219 | ||
73836c5c | 2220 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2221 | |
843d2643 LP |
2222 | return 0; |
2223 | } | |
2224 | ||
ade509ce LP |
2225 | int make_null_stdio(void) { |
2226 | int null_fd; | |
2227 | ||
cd3bd60a LP |
2228 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2229 | if (null_fd < 0) | |
ade509ce LP |
2230 | return -errno; |
2231 | ||
2232 | return make_stdio(null_fd); | |
2233 | } | |
2234 | ||
8407a5d0 LP |
2235 | bool is_device_path(const char *path) { |
2236 | ||
2237 | /* Returns true on paths that refer to a device, either in | |
2238 | * sysfs or in /dev */ | |
2239 | ||
2240 | return | |
2241 | path_startswith(path, "/dev/") || | |
2242 | path_startswith(path, "/sys/"); | |
2243 | } | |
2244 | ||
01f78473 | 2245 | int dir_is_empty(const char *path) { |
a05f97b3 | 2246 | _cleanup_closedir_ DIR *d; |
01f78473 | 2247 | |
a05f97b3 LP |
2248 | d = opendir(path); |
2249 | if (!d) | |
01f78473 LP |
2250 | return -errno; |
2251 | ||
2252 | for (;;) { | |
7d5e9c0f | 2253 | struct dirent *de; |
01f78473 | 2254 | |
3fd11280 FW |
2255 | errno = 0; |
2256 | de = readdir(d); | |
2257 | if (!de && errno != 0) | |
2258 | return -errno; | |
01f78473 | 2259 | |
a05f97b3 LP |
2260 | if (!de) |
2261 | return 1; | |
01f78473 | 2262 | |
a05f97b3 LP |
2263 | if (!ignore_file(de->d_name)) |
2264 | return 0; | |
2265 | } | |
01f78473 LP |
2266 | } |
2267 | ||
844ec79b ZJS |
2268 | char* dirname_malloc(const char *path) { |
2269 | char *d, *dir, *dir2; | |
2270 | ||
2271 | d = strdup(path); | |
2272 | if (!d) | |
2273 | return NULL; | |
2274 | dir = dirname(d); | |
2275 | assert(dir); | |
2276 | ||
2277 | if (dir != d) { | |
2278 | dir2 = strdup(dir); | |
2279 | free(d); | |
2280 | return dir2; | |
2281 | } | |
2282 | ||
2283 | return dir; | |
2284 | } | |
2285 | ||
b89446bb | 2286 | int dev_urandom(void *p, size_t n) { |
a05f97b3 | 2287 | _cleanup_close_ int fd; |
9bf3b535 | 2288 | ssize_t k; |
d3782d60 | 2289 | |
ac0930c8 LP |
2290 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2291 | if (fd < 0) | |
b89446bb | 2292 | return errno == ENOENT ? -ENOSYS : -errno; |
d3782d60 | 2293 | |
9bf3b535 | 2294 | k = loop_read(fd, p, n, true); |
b89446bb LP |
2295 | if (k < 0) |
2296 | return (int) k; | |
2297 | if ((size_t) k != n) | |
2298 | return -EIO; | |
2299 | ||
2300 | return 0; | |
2301 | } | |
2302 | ||
2303 | void random_bytes(void *p, size_t n) { | |
2304 | static bool srand_called = false; | |
2305 | uint8_t *q; | |
2306 | int r; | |
d3782d60 | 2307 | |
b89446bb LP |
2308 | r = dev_urandom(p, n); |
2309 | if (r >= 0) | |
2310 | return; | |
d3782d60 | 2311 | |
b89446bb LP |
2312 | /* If some idiot made /dev/urandom unavailable to us, he'll |
2313 | * get a PRNG instead. */ | |
d3782d60 | 2314 | |
9bf3b535 | 2315 | if (!srand_called) { |
b89446bb | 2316 | unsigned x = 0; |
a3b6fafe | 2317 | |
9bf3b535 LP |
2318 | #ifdef HAVE_SYS_AUXV_H |
2319 | /* The kernel provides us with a bit of entropy in | |
2320 | * auxv, so let's try to make use of that to seed the | |
2321 | * pseudo-random generator. It's better than | |
2322 | * nothing... */ | |
a3b6fafe | 2323 | |
9bf3b535 LP |
2324 | void *auxv; |
2325 | ||
2326 | auxv = (void*) getauxval(AT_RANDOM); | |
2327 | if (auxv) | |
b89446bb | 2328 | x ^= *(unsigned*) auxv; |
9bf3b535 | 2329 | #endif |
a3b6fafe | 2330 | |
b89446bb LP |
2331 | x ^= (unsigned) now(CLOCK_REALTIME); |
2332 | x ^= (unsigned) gettid(); | |
2333 | ||
2334 | srand(x); | |
9bf3b535 LP |
2335 | srand_called = true; |
2336 | } | |
a3b6fafe | 2337 | |
9bf3b535 LP |
2338 | for (q = p; q < (uint8_t*) p + n; q ++) |
2339 | *q = rand(); | |
a3b6fafe LP |
2340 | } |
2341 | ||
5b6319dc LP |
2342 | void rename_process(const char name[8]) { |
2343 | assert(name); | |
2344 | ||
5d6b1584 LP |
2345 | /* This is a like a poor man's setproctitle(). It changes the |
2346 | * comm field, argv[0], and also the glibc's internally used | |
2347 | * name of the process. For the first one a limit of 16 chars | |
2348 | * applies, to the second one usually one of 10 (i.e. length | |
2349 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2350 | * "systemd"). If you pass a longer string it will be | |
2351 | * truncated */ | |
5b6319dc | 2352 | |
5d6b1584 | 2353 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2354 | |
2355 | if (program_invocation_name) | |
2356 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2357 | |
2358 | if (saved_argc > 0) { | |
2359 | int i; | |
2360 | ||
2361 | if (saved_argv[0]) | |
2362 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2363 | ||
2364 | for (i = 1; i < saved_argc; i++) { | |
2365 | if (!saved_argv[i]) | |
2366 | break; | |
2367 | ||
29804cc1 | 2368 | memzero(saved_argv[i], strlen(saved_argv[i])); |
9a0e6896 LP |
2369 | } |
2370 | } | |
5b6319dc LP |
2371 | } |
2372 | ||
7d793605 LP |
2373 | void sigset_add_many(sigset_t *ss, ...) { |
2374 | va_list ap; | |
2375 | int sig; | |
2376 | ||
2377 | assert(ss); | |
2378 | ||
2379 | va_start(ap, ss); | |
2380 | while ((sig = va_arg(ap, int)) > 0) | |
2381 | assert_se(sigaddset(ss, sig) == 0); | |
2382 | va_end(ap); | |
2383 | } | |
2384 | ||
ef2f1067 LP |
2385 | char* gethostname_malloc(void) { |
2386 | struct utsname u; | |
2387 | ||
2388 | assert_se(uname(&u) >= 0); | |
2389 | ||
344de609 | 2390 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2391 | return strdup(u.nodename); |
2392 | ||
2393 | return strdup(u.sysname); | |
2394 | } | |
2395 | ||
344de609 LP |
2396 | bool hostname_is_set(void) { |
2397 | struct utsname u; | |
2398 | ||
2399 | assert_se(uname(&u) >= 0); | |
2400 | ||
2401 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2402 | } | |
2403 | ||
7c5f152a | 2404 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2405 | long bufsize; |
a05f97b3 LP |
2406 | char *name; |
2407 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2408 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2409 | |
2410 | /* Shortcut things to avoid NSS lookups */ | |
2411 | if (uid == 0) | |
2412 | return strdup("root"); | |
2413 | ||
7c5f152a LP |
2414 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2415 | if (bufsize <= 0) | |
ef2f1067 LP |
2416 | bufsize = 4096; |
2417 | ||
7c5f152a LP |
2418 | buf = malloc(bufsize); |
2419 | if (!buf) | |
ef2f1067 LP |
2420 | return NULL; |
2421 | ||
a05f97b3 LP |
2422 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2423 | return strdup(pw->pw_name); | |
ef2f1067 LP |
2424 | |
2425 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
2426 | return NULL; | |
2427 | ||
2428 | return name; | |
2429 | } | |
2430 | ||
7c5f152a LP |
2431 | char* getlogname_malloc(void) { |
2432 | uid_t uid; | |
2433 | struct stat st; | |
2434 | ||
2435 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2436 | uid = st.st_uid; | |
2437 | else | |
2438 | uid = getuid(); | |
2439 | ||
2440 | return lookup_uid(uid); | |
2441 | } | |
2442 | ||
2443 | char *getusername_malloc(void) { | |
2444 | const char *e; | |
2445 | ||
2446 | e = getenv("USER"); | |
2447 | if (e) | |
2448 | return strdup(e); | |
2449 | ||
2450 | return lookup_uid(getuid()); | |
2451 | } | |
2452 | ||
fc116c6a LP |
2453 | int getttyname_malloc(int fd, char **r) { |
2454 | char path[PATH_MAX], *c; | |
618e02c7 | 2455 | int k; |
8c6db833 LP |
2456 | |
2457 | assert(r); | |
ef2f1067 | 2458 | |
a05f97b3 | 2459 | k = ttyname_r(fd, path, sizeof(path)); |
27373e44 | 2460 | if (k > 0) |
618e02c7 | 2461 | return -k; |
ef2f1067 LP |
2462 | |
2463 | char_array_0(path); | |
2464 | ||
a05f97b3 LP |
2465 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2466 | if (!c) | |
8c6db833 LP |
2467 | return -ENOMEM; |
2468 | ||
2469 | *r = c; | |
2470 | return 0; | |
2471 | } | |
2472 | ||
fc116c6a LP |
2473 | int getttyname_harder(int fd, char **r) { |
2474 | int k; | |
2475 | char *s; | |
2476 | ||
a05f97b3 LP |
2477 | k = getttyname_malloc(fd, &s); |
2478 | if (k < 0) | |
fc116c6a LP |
2479 | return k; |
2480 | ||
2481 | if (streq(s, "tty")) { | |
2482 | free(s); | |
4d6d6518 | 2483 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2484 | } |
2485 | ||
2486 | *r = s; | |
2487 | return 0; | |
2488 | } | |
2489 | ||
4d6d6518 | 2490 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
b4696bce SP |
2491 | int r; |
2492 | _cleanup_free_ char *line = NULL; | |
2493 | const char *p; | |
fc116c6a | 2494 | unsigned long ttynr; |
fc116c6a | 2495 | |
49aa47c7 | 2496 | assert(pid >= 0); |
49aa47c7 | 2497 | |
b4696bce SP |
2498 | p = procfs_file_alloca(pid, "stat"); |
2499 | r = read_one_line_file(p, &line); | |
2500 | if (r < 0) | |
2501 | return r; | |
fc116c6a | 2502 | |
4d6d6518 LP |
2503 | p = strrchr(line, ')'); |
2504 | if (!p) | |
fc116c6a LP |
2505 | return -EIO; |
2506 | ||
2507 | p++; | |
2508 | ||
2509 | if (sscanf(p, " " | |
2510 | "%*c " /* state */ | |
2511 | "%*d " /* ppid */ | |
2512 | "%*d " /* pgrp */ | |
2513 | "%*d " /* session */ | |
2514 | "%lu ", /* ttynr */ | |
2515 | &ttynr) != 1) | |
2516 | return -EIO; | |
2517 | ||
11dc5d2b LP |
2518 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2519 | return -ENOENT; | |
2520 | ||
0bee65f0 LP |
2521 | if (d) |
2522 | *d = (dev_t) ttynr; | |
2523 | ||
fc116c6a LP |
2524 | return 0; |
2525 | } | |
2526 | ||
4d6d6518 | 2527 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 2528 | int k; |
fa70beaa | 2529 | char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *s, *b, *p; |
fc116c6a LP |
2530 | dev_t devnr; |
2531 | ||
2532 | assert(r); | |
2533 | ||
4d6d6518 LP |
2534 | k = get_ctty_devnr(pid, &devnr); |
2535 | if (k < 0) | |
fc116c6a LP |
2536 | return k; |
2537 | ||
2538 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
fc116c6a | 2539 | |
23406ce5 LP |
2540 | k = readlink_malloc(fn, &s); |
2541 | if (k < 0) { | |
fc116c6a LP |
2542 | |
2543 | if (k != -ENOENT) | |
2544 | return k; | |
2545 | ||
46824d0e LP |
2546 | /* This is an ugly hack */ |
2547 | if (major(devnr) == 136) { | |
2548 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
2549 | return -ENOMEM; | |
2550 | ||
2551 | *r = b; | |
2552 | if (_devnr) | |
2553 | *_devnr = devnr; | |
2554 | ||
2555 | return 0; | |
2556 | } | |
2557 | ||
fc116c6a LP |
2558 | /* Probably something like the ptys which have no |
2559 | * symlink in /dev/char. Let's return something | |
2560 | * vaguely useful. */ | |
2561 | ||
23406ce5 LP |
2562 | b = strdup(fn + 5); |
2563 | if (!b) | |
fc116c6a LP |
2564 | return -ENOMEM; |
2565 | ||
2566 | *r = b; | |
46824d0e LP |
2567 | if (_devnr) |
2568 | *_devnr = devnr; | |
2569 | ||
fc116c6a LP |
2570 | return 0; |
2571 | } | |
2572 | ||
2573 | if (startswith(s, "/dev/")) | |
2574 | p = s + 5; | |
2575 | else if (startswith(s, "../")) | |
2576 | p = s + 3; | |
2577 | else | |
2578 | p = s; | |
2579 | ||
2580 | b = strdup(p); | |
2581 | free(s); | |
2582 | ||
2583 | if (!b) | |
2584 | return -ENOMEM; | |
2585 | ||
2586 | *r = b; | |
46824d0e LP |
2587 | if (_devnr) |
2588 | *_devnr = devnr; | |
2589 | ||
fc116c6a LP |
2590 | return 0; |
2591 | } | |
2592 | ||
f56d5db9 | 2593 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
2594 | DIR *d; |
2595 | int ret = 0; | |
2596 | ||
2597 | assert(fd >= 0); | |
2598 | ||
2599 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2600 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2601 | |
d4d046e3 LP |
2602 | d = fdopendir(fd); |
2603 | if (!d) { | |
8c6db833 | 2604 | close_nointr_nofail(fd); |
4c633005 LP |
2605 | |
2606 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2607 | } |
2608 | ||
2609 | for (;;) { | |
7d5e9c0f | 2610 | struct dirent *de; |
7925c22a LP |
2611 | bool is_dir, keep_around; |
2612 | struct stat st; | |
8c6db833 LP |
2613 | int r; |
2614 | ||
3fd11280 FW |
2615 | errno = 0; |
2616 | de = readdir(d); | |
2617 | if (!de && errno != 0) { | |
2618 | if (ret == 0) | |
2619 | ret = -errno; | |
8c6db833 LP |
2620 | break; |
2621 | } | |
2622 | ||
2623 | if (!de) | |
2624 | break; | |
2625 | ||
2626 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
2627 | continue; | |
2628 | ||
7925c22a LP |
2629 | if (de->d_type == DT_UNKNOWN || |
2630 | honour_sticky || | |
2631 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2632 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2633 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2634 | ret = -errno; |
2635 | continue; | |
2636 | } | |
2637 | ||
2638 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2639 | keep_around = |
2640 | honour_sticky && | |
2641 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2642 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2643 | } else { |
8c6db833 | 2644 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2645 | keep_around = false; |
ad293f5a | 2646 | } |
8c6db833 LP |
2647 | |
2648 | if (is_dir) { | |
2649 | int subdir_fd; | |
8c6db833 | 2650 | |
597f43c7 | 2651 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
2652 | if (root_dev && st.st_dev != root_dev->st_dev) |
2653 | continue; | |
8c6db833 | 2654 | |
7925c22a LP |
2655 | subdir_fd = openat(fd, de->d_name, |
2656 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
2657 | if (subdir_fd < 0) { | |
2658 | if (ret == 0 && errno != ENOENT) | |
2659 | ret = -errno; | |
2660 | continue; | |
2661 | } | |
2662 | ||
b3d28469 | 2663 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
2664 | if (r < 0 && ret == 0) |
2665 | ret = r; | |
2666 | ||
2667 | if (!keep_around) | |
2668 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
2669 | if (ret == 0 && errno != ENOENT) |
2670 | ret = -errno; | |
2671 | } | |
2672 | ||
2673 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
2674 | |
2675 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 2676 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2677 | ret = -errno; |
2678 | } | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | closedir(d); | |
2683 | ||
2684 | return ret; | |
2685 | } | |
2686 | ||
44a6b1b6 | 2687 | _pure_ static int is_temporary_fs(struct statfs *s) { |
943aad8c | 2688 | assert(s); |
73020ab2 SL |
2689 | |
2690 | return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) || | |
2691 | F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC); | |
943aad8c ZJS |
2692 | } |
2693 | ||
f56d5db9 LP |
2694 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
2695 | struct statfs s; | |
2696 | ||
2697 | assert(fd >= 0); | |
2698 | ||
2699 | if (fstatfs(fd, &s) < 0) { | |
2700 | close_nointr_nofail(fd); | |
2701 | return -errno; | |
2702 | } | |
2703 | ||
2704 | /* We refuse to clean disk file systems with this call. This | |
2705 | * is extra paranoia just to be sure we never ever remove | |
2706 | * non-state data */ | |
943aad8c | 2707 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2708 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2709 | close_nointr_nofail(fd); | |
2710 | return -EPERM; | |
2711 | } | |
2712 | ||
2713 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
2714 | } | |
2715 | ||
2716 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
2717 | int fd, r; | |
2718 | struct statfs s; | |
8c6db833 LP |
2719 | |
2720 | assert(path); | |
2721 | ||
f56d5db9 LP |
2722 | /* We refuse to clean the root file system with this |
2723 | * call. This is extra paranoia to never cause a really | |
2724 | * seriously broken system. */ | |
2725 | if (path_equal(path, "/")) { | |
2726 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
2727 | return -EPERM; | |
2728 | } | |
461b1822 | 2729 | |
d4d046e3 LP |
2730 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
2731 | if (fd < 0) { | |
8c6db833 LP |
2732 | |
2733 | if (errno != ENOTDIR) | |
2734 | return -errno; | |
2735 | ||
f56d5db9 LP |
2736 | if (!dangerous) { |
2737 | if (statfs(path, &s) < 0) | |
2738 | return -errno; | |
2739 | ||
943aad8c | 2740 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2741 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2742 | return -EPERM; | |
2743 | } | |
2744 | } | |
2745 | ||
8c6db833 | 2746 | if (delete_root && !only_dirs) |
d4d046e3 | 2747 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
2748 | return -errno; |
2749 | ||
2750 | return 0; | |
2751 | } | |
2752 | ||
f56d5db9 LP |
2753 | if (!dangerous) { |
2754 | if (fstatfs(fd, &s) < 0) { | |
2755 | close_nointr_nofail(fd); | |
2756 | return -errno; | |
2757 | } | |
ad293f5a | 2758 | |
943aad8c | 2759 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2760 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2761 | close_nointr_nofail(fd); | |
2762 | return -EPERM; | |
2763 | } | |
2764 | } | |
2765 | ||
2766 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
2767 | if (delete_root) { |
2768 | ||
8d53b453 | 2769 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 2770 | return r; |
8c6db833 | 2771 | |
e27796a0 | 2772 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
2773 | if (r == 0) |
2774 | r = -errno; | |
2775 | } | |
ad293f5a | 2776 | } |
8c6db833 LP |
2777 | |
2778 | return r; | |
2779 | } | |
2780 | ||
f56d5db9 LP |
2781 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
2782 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
2783 | } | |
2784 | ||
2785 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
2786 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
2787 | } | |
2788 | ||
8c6db833 LP |
2789 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
2790 | assert(path); | |
2791 | ||
2792 | /* Under the assumption that we are running privileged we | |
2793 | * first change the access mode and only then hand out | |
2794 | * ownership to avoid a window where access is too open. */ | |
2795 | ||
8d53b453 LP |
2796 | if (mode != (mode_t) -1) |
2797 | if (chmod(path, mode) < 0) | |
2798 | return -errno; | |
8c6db833 | 2799 | |
8d53b453 LP |
2800 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2801 | if (chown(path, uid, gid) < 0) | |
2802 | return -errno; | |
8c6db833 LP |
2803 | |
2804 | return 0; | |
ef2f1067 LP |
2805 | } |
2806 | ||
f4b47811 LP |
2807 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
2808 | assert(fd >= 0); | |
2809 | ||
2810 | /* Under the assumption that we are running privileged we | |
2811 | * first change the access mode and only then hand out | |
2812 | * ownership to avoid a window where access is too open. */ | |
2813 | ||
9588bc32 LP |
2814 | if (mode != (mode_t) -1) |
2815 | if (fchmod(fd, mode) < 0) | |
2816 | return -errno; | |
f4b47811 | 2817 | |
9588bc32 LP |
2818 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2819 | if (fchown(fd, uid, gid) < 0) | |
2820 | return -errno; | |
f4b47811 LP |
2821 | |
2822 | return 0; | |
2823 | } | |
2824 | ||
82c121a4 LP |
2825 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2826 | cpu_set_t *r; | |
2827 | unsigned n = 1024; | |
2828 | ||
2829 | /* Allocates the cpuset in the right size */ | |
2830 | ||
2831 | for (;;) { | |
2832 | if (!(r = CPU_ALLOC(n))) | |
2833 | return NULL; | |
2834 | ||
2835 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2836 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2837 | ||
2838 | if (ncpus) | |
2839 | *ncpus = n; | |
2840 | ||
2841 | return r; | |
2842 | } | |
2843 | ||
2844 | CPU_FREE(r); | |
2845 | ||
2846 | if (errno != EINVAL) | |
2847 | return NULL; | |
2848 | ||
2849 | n *= 2; | |
2850 | } | |
2851 | } | |
2852 | ||
984a2be4 | 2853 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) { |
9ab7a8d2 | 2854 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
2855 | _cleanup_free_ char *s = NULL; |
2856 | _cleanup_close_ int fd = -1; | |
b92bea5d | 2857 | struct iovec iovec[6] = {}; |
81beb750 | 2858 | int n = 0; |
984a2be4 | 2859 | static bool prev_ephemeral; |
9e58ff9c LP |
2860 | |
2861 | assert(format); | |
2862 | ||
9ab7a8d2 | 2863 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
2864 | * optional and go exclusively to the console. */ |
2865 | ||
2866 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 2867 | return log_oom(); |
9e58ff9c | 2868 | |
67e5cc4f | 2869 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 2870 | if (fd < 0) |
669bec5d | 2871 | return fd; |
9e58ff9c | 2872 | |
67e5cc4f | 2873 | if (ellipse) { |
9ab7a8d2 MS |
2874 | char *e; |
2875 | size_t emax, sl; | |
2876 | int c; | |
2877 | ||
67e5cc4f LP |
2878 | c = fd_columns(fd); |
2879 | if (c <= 0) | |
2880 | c = 80; | |
81beb750 | 2881 | |
669bec5d | 2882 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
2883 | |
2884 | emax = c - sl - 1; | |
2885 | if (emax < 3) | |
2886 | emax = 3; | |
81beb750 | 2887 | |
67e5cc4f LP |
2888 | e = ellipsize(s, emax, 75); |
2889 | if (e) { | |
2890 | free(s); | |
2891 | s = e; | |
2892 | } | |
81beb750 LP |
2893 | } |
2894 | ||
984a2be4 MS |
2895 | if (prev_ephemeral) |
2896 | IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE); | |
2897 | prev_ephemeral = ephemeral; | |
2898 | ||
9ab7a8d2 MS |
2899 | if (status) { |
2900 | if (!isempty(status)) { | |
2901 | IOVEC_SET_STRING(iovec[n++], "["); | |
2902 | IOVEC_SET_STRING(iovec[n++], status); | |
2903 | IOVEC_SET_STRING(iovec[n++], "] "); | |
2904 | } else | |
2905 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
2906 | } |
2907 | ||
9ab7a8d2 | 2908 | IOVEC_SET_STRING(iovec[n++], s); |
984a2be4 MS |
2909 | if (!ephemeral) |
2910 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 2911 | |
669bec5d LP |
2912 | if (writev(fd, iovec, n) < 0) |
2913 | return -errno; | |
9e58ff9c | 2914 | |
669bec5d | 2915 | return 0; |
9e58ff9c LP |
2916 | } |
2917 | ||
984a2be4 | 2918 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) { |
c846ff47 | 2919 | va_list ap; |
669bec5d | 2920 | int r; |
c846ff47 LP |
2921 | |
2922 | assert(format); | |
2923 | ||
2924 | va_start(ap, format); | |
984a2be4 | 2925 | r = status_vprintf(status, ellipse, ephemeral, format, ap); |
c846ff47 | 2926 | va_end(ap); |
669bec5d LP |
2927 | |
2928 | return r; | |
c846ff47 LP |
2929 | } |
2930 | ||
fab56fc5 LP |
2931 | char *replace_env(const char *format, char **env) { |
2932 | enum { | |
2933 | WORD, | |
c24eb49e | 2934 | CURLY, |
fab56fc5 LP |
2935 | VARIABLE |
2936 | } state = WORD; | |
2937 | ||
2938 | const char *e, *word = format; | |
2939 | char *r = NULL, *k; | |
2940 | ||
2941 | assert(format); | |
2942 | ||
2943 | for (e = format; *e; e ++) { | |
2944 | ||
2945 | switch (state) { | |
2946 | ||
2947 | case WORD: | |
2948 | if (*e == '$') | |
c24eb49e | 2949 | state = CURLY; |
fab56fc5 LP |
2950 | break; |
2951 | ||
c24eb49e LP |
2952 | case CURLY: |
2953 | if (*e == '{') { | |
fab56fc5 LP |
2954 | if (!(k = strnappend(r, word, e-word-1))) |
2955 | goto fail; | |
2956 | ||
2957 | free(r); | |
2958 | r = k; | |
2959 | ||
2960 | word = e-1; | |
2961 | state = VARIABLE; | |
2962 | ||
2963 | } else if (*e == '$') { | |
2964 | if (!(k = strnappend(r, word, e-word))) | |
2965 | goto fail; | |
2966 | ||
2967 | free(r); | |
2968 | r = k; | |
2969 | ||
2970 | word = e+1; | |
2971 | state = WORD; | |
2972 | } else | |
2973 | state = WORD; | |
2974 | break; | |
2975 | ||
2976 | case VARIABLE: | |
c24eb49e | 2977 | if (*e == '}') { |
b95cf362 | 2978 | const char *t; |
fab56fc5 | 2979 | |
4d1a6904 | 2980 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 2981 | |
4d1a6904 LP |
2982 | k = strappend(r, t); |
2983 | if (!k) | |
b95cf362 | 2984 | goto fail; |
fab56fc5 | 2985 | |
b95cf362 LP |
2986 | free(r); |
2987 | r = k; | |
fab56fc5 | 2988 | |
b95cf362 | 2989 | word = e+1; |
fab56fc5 LP |
2990 | state = WORD; |
2991 | } | |
2992 | break; | |
2993 | } | |
2994 | } | |
2995 | ||
2996 | if (!(k = strnappend(r, word, e-word))) | |
2997 | goto fail; | |
2998 | ||
2999 | free(r); | |
3000 | return k; | |
3001 | ||
3002 | fail: | |
3003 | free(r); | |
3004 | return NULL; | |
3005 | } | |
3006 | ||
3007 | char **replace_env_argv(char **argv, char **env) { | |
3008 | char **r, **i; | |
c24eb49e LP |
3009 | unsigned k = 0, l = 0; |
3010 | ||
3011 | l = strv_length(argv); | |
fab56fc5 | 3012 | |
c24eb49e | 3013 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3014 | return NULL; |
3015 | ||
3016 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3017 | |
3018 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3019 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3020 | char *e; | |
3021 | char **w, **m; | |
3022 | unsigned q; | |
c24eb49e | 3023 | |
4d1a6904 LP |
3024 | e = strv_env_get(env, *i+1); |
3025 | if (e) { | |
c24eb49e LP |
3026 | |
3027 | if (!(m = strv_split_quoted(e))) { | |
3028 | r[k] = NULL; | |
3029 | strv_free(r); | |
3030 | return NULL; | |
3031 | } | |
b95cf362 LP |
3032 | } else |
3033 | m = NULL; | |
c24eb49e | 3034 | |
b95cf362 LP |
3035 | q = strv_length(m); |
3036 | l = l + q - 1; | |
c24eb49e | 3037 | |
b95cf362 LP |
3038 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3039 | r[k] = NULL; | |
3040 | strv_free(r); | |
3041 | strv_free(m); | |
3042 | return NULL; | |
3043 | } | |
c24eb49e | 3044 | |
b95cf362 LP |
3045 | r = w; |
3046 | if (m) { | |
c24eb49e LP |
3047 | memcpy(r + k, m, q * sizeof(char*)); |
3048 | free(m); | |
c24eb49e | 3049 | } |
b95cf362 LP |
3050 | |
3051 | k += q; | |
3052 | continue; | |
c24eb49e LP |
3053 | } |
3054 | ||
3055 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3056 | if (!(r[k++] = replace_env(*i, env))) { |
3057 | strv_free(r); | |
3058 | return NULL; | |
3059 | } | |
3060 | } | |
3061 | ||
3062 | r[k] = NULL; | |
3063 | return r; | |
3064 | } | |
3065 | ||
81beb750 | 3066 | int fd_columns(int fd) { |
b92bea5d | 3067 | struct winsize ws = {}; |
81beb750 LP |
3068 | |
3069 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3070 | return -errno; | |
3071 | ||
3072 | if (ws.ws_col <= 0) | |
3073 | return -EIO; | |
3074 | ||
3075 | return ws.ws_col; | |
3076 | } | |
3077 | ||
28917d7d | 3078 | unsigned columns(void) { |
fa776d8e | 3079 | const char *e; |
7009eec2 | 3080 | int c; |
fa776d8e | 3081 | |
28917d7d LP |
3082 | if (_likely_(cached_columns > 0)) |
3083 | return cached_columns; | |
11f96fac | 3084 | |
28917d7d LP |
3085 | c = 0; |
3086 | e = getenv("COLUMNS"); | |
3087 | if (e) | |
7009eec2 | 3088 | safe_atoi(e, &c); |
fa776d8e | 3089 | |
28917d7d LP |
3090 | if (c <= 0) |
3091 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3092 | |
28917d7d LP |
3093 | if (c <= 0) |
3094 | c = 80; | |
11f96fac | 3095 | |
28917d7d LP |
3096 | cached_columns = c; |
3097 | return c; | |
11f96fac ZJS |
3098 | } |
3099 | ||
8f2d43a0 | 3100 | int fd_lines(int fd) { |
b92bea5d | 3101 | struct winsize ws = {}; |
8f2d43a0 LP |
3102 | |
3103 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3104 | return -errno; | |
3105 | ||
3106 | if (ws.ws_row <= 0) | |
3107 | return -EIO; | |
3108 | ||
3109 | return ws.ws_row; | |
3110 | } | |
3111 | ||
3112 | unsigned lines(void) { | |
8f2d43a0 | 3113 | const char *e; |
ed757c0c | 3114 | unsigned l; |
8f2d43a0 | 3115 | |
ed757c0c LP |
3116 | if (_likely_(cached_lines > 0)) |
3117 | return cached_lines; | |
8f2d43a0 | 3118 | |
ed757c0c | 3119 | l = 0; |
8f2d43a0 LP |
3120 | e = getenv("LINES"); |
3121 | if (e) | |
ed757c0c | 3122 | safe_atou(e, &l); |
8f2d43a0 | 3123 | |
ed757c0c LP |
3124 | if (l <= 0) |
3125 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3126 | |
ed757c0c LP |
3127 | if (l <= 0) |
3128 | l = 24; | |
8f2d43a0 | 3129 | |
ed757c0c LP |
3130 | cached_lines = l; |
3131 | return cached_lines; | |
3132 | } | |
3133 | ||
3134 | /* intended to be used as a SIGWINCH sighandler */ | |
3135 | void columns_lines_cache_reset(int signum) { | |
3136 | cached_columns = 0; | |
3137 | cached_lines = 0; | |
3138 | } | |
3139 | ||
3140 | bool on_tty(void) { | |
3141 | static int cached_on_tty = -1; | |
3142 | ||
3143 | if (_unlikely_(cached_on_tty < 0)) | |
3144 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3145 | ||
3146 | return cached_on_tty; | |
8f2d43a0 LP |
3147 | } |
3148 | ||
b4f10a5e | 3149 | int running_in_chroot(void) { |
b92bea5d | 3150 | struct stat a = {}, b = {}; |
b4f10a5e LP |
3151 | |
3152 | /* Only works as root */ | |
b4f10a5e LP |
3153 | if (stat("/proc/1/root", &a) < 0) |
3154 | return -errno; | |
3155 | ||
3156 | if (stat("/", &b) < 0) | |
3157 | return -errno; | |
3158 | ||
3159 | return | |
3160 | a.st_dev != b.st_dev || | |
3161 | a.st_ino != b.st_ino; | |
3162 | } | |
3163 | ||
f405e86d | 3164 | static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
72f59706 | 3165 | size_t x; |
8fe914ec LP |
3166 | char *r; |
3167 | ||
3168 | assert(s); | |
3169 | assert(percent <= 100); | |
72f59706 | 3170 | assert(new_length >= 3); |
8fe914ec | 3171 | |
72f59706 LP |
3172 | if (old_length <= 3 || old_length <= new_length) |
3173 | return strndup(s, old_length); | |
8fe914ec | 3174 | |
72f59706 LP |
3175 | r = new0(char, new_length+1); |
3176 | if (!r) | |
a6f0104a | 3177 | return NULL; |
8fe914ec | 3178 | |
72f59706 | 3179 | x = (new_length * percent) / 100; |
8fe914ec | 3180 | |
72f59706 LP |
3181 | if (x > new_length - 3) |
3182 | x = new_length - 3; | |
8fe914ec LP |
3183 | |
3184 | memcpy(r, s, x); | |
3185 | r[x] = '.'; | |
3186 | r[x+1] = '.'; | |
3187 | r[x+2] = '.'; | |
3188 | memcpy(r + x + 3, | |
72f59706 LP |
3189 | s + old_length - (new_length - x - 3), |
3190 | new_length - x - 3); | |
8fe914ec LP |
3191 | |
3192 | return r; | |
3193 | } | |
3194 | ||
f405e86d SL |
3195 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3196 | size_t x; | |
3197 | char *e; | |
3198 | const char *i, *j; | |
3199 | unsigned k, len, len2; | |
3200 | ||
3201 | assert(s); | |
3202 | assert(percent <= 100); | |
3203 | assert(new_length >= 3); | |
3204 | ||
3205 | /* if no multibyte characters use ascii_ellipsize_mem for speed */ | |
3206 | if (ascii_is_valid(s)) | |
3207 | return ascii_ellipsize_mem(s, old_length, new_length, percent); | |
3208 | ||
3209 | if (old_length <= 3 || old_length <= new_length) | |
3210 | return strndup(s, old_length); | |
3211 | ||
3212 | x = (new_length * percent) / 100; | |
3213 | ||
3214 | if (x > new_length - 3) | |
3215 | x = new_length - 3; | |
3216 | ||
3217 | k = 0; | |
3218 | for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) { | |
3219 | int c; | |
3220 | ||
3221 | c = utf8_encoded_to_unichar(i); | |
3222 | if (c < 0) | |
3223 | return NULL; | |
3224 | k += unichar_iswide(c) ? 2 : 1; | |
3225 | } | |
3226 | ||
3227 | if (k > x) /* last character was wide and went over quota */ | |
3228 | x ++; | |
3229 | ||
3230 | for (j = s + old_length; k < new_length && j > i; ) { | |
3231 | int c; | |
3232 | ||
3233 | j = utf8_prev_char(j); | |
3234 | c = utf8_encoded_to_unichar(j); | |
3235 | if (c < 0) | |
3236 | return NULL; | |
3237 | k += unichar_iswide(c) ? 2 : 1; | |
3238 | } | |
3239 | assert(i <= j); | |
3240 | ||
3241 | /* we don't actually need to ellipsize */ | |
3242 | if (i == j) | |
3243 | return memdup(s, old_length + 1); | |
3244 | ||
3245 | /* make space for ellipsis */ | |
3246 | j = utf8_next_char(j); | |
3247 | ||
3248 | len = i - s; | |
3249 | len2 = s + old_length - j; | |
3250 | e = new(char, len + 3 + len2 + 1); | |
3251 | if (!e) | |
3252 | return NULL; | |
3253 | ||
3254 | /* | |
3255 | printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n", | |
3256 | old_length, new_length, x, len, len2, k); | |
3257 | */ | |
3258 | ||
3259 | memcpy(e, s, len); | |
3260 | e[len] = 0xe2; /* tri-dot ellipsis: … */ | |
3261 | e[len + 1] = 0x80; | |
3262 | e[len + 2] = 0xa6; | |
3263 | ||
3264 | memcpy(e + len + 3, j, len2 + 1); | |
3265 | ||
3266 | return e; | |
3267 | } | |
3268 | ||
72f59706 LP |
3269 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3270 | return ellipsize_mem(s, strlen(s), length, percent); | |
3271 | } | |
3272 | ||
f6144808 LP |
3273 | int touch(const char *path) { |
3274 | int fd; | |
3275 | ||
3276 | assert(path); | |
3277 | ||
73836c5c LP |
3278 | /* This just opens the file for writing, ensuring it |
3279 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3280 | * does it. */ | |
3281 | ||
3282 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3283 | if (fd < 0) | |
f6144808 LP |
3284 | return -errno; |
3285 | ||
3286 | close_nointr_nofail(fd); | |
3287 | return 0; | |
3288 | } | |
afea26ad | 3289 | |
97c4a07d | 3290 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3291 | size_t l; |
3292 | assert(s); | |
3293 | ||
73836c5c LP |
3294 | /* This is rather stupid, simply removes the heading and |
3295 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3296 | * escaping or anything. We should make this smarter one |
3297 | * day...*/ | |
73836c5c | 3298 | |
31ed59c5 LP |
3299 | l = strlen(s); |
3300 | if (l < 2) | |
11ce3427 LP |
3301 | return strdup(s); |
3302 | ||
97c4a07d | 3303 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3304 | return strndup(s+1, l-2); |
3305 | ||
3306 | return strdup(s); | |
3307 | } | |
3308 | ||
5f7c426e | 3309 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3310 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3311 | char *eq, *r; | |
5f7c426e | 3312 | |
57f30678 LP |
3313 | eq = strchr(s, '='); |
3314 | if (!eq) { | |
3315 | char *t; | |
5f7c426e | 3316 | |
57f30678 LP |
3317 | r = strdup(s); |
3318 | if (!r) | |
5f7c426e LP |
3319 | return NULL; |
3320 | ||
57f30678 LP |
3321 | t = strstrip(r); |
3322 | if (t == r) | |
3323 | return r; | |
3324 | ||
3325 | memmove(r, t, strlen(t) + 1); | |
3326 | return r; | |
5f7c426e LP |
3327 | } |
3328 | ||
57f30678 LP |
3329 | name = strndup(s, eq - s); |
3330 | if (!name) | |
5f7c426e LP |
3331 | return NULL; |
3332 | ||
57f30678 LP |
3333 | p = strdup(eq + 1); |
3334 | if (!p) | |
5f7c426e | 3335 | return NULL; |
5f7c426e LP |
3336 | |
3337 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3338 | if (!value) |
5f7c426e | 3339 | return NULL; |
5f7c426e | 3340 | |
57f30678 | 3341 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3342 | r = NULL; |
3343 | ||
5f7c426e LP |
3344 | return r; |
3345 | } | |
3346 | ||
8e12a6ae | 3347 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3348 | siginfo_t dummy; |
3349 | ||
2e78aa99 | 3350 | assert(pid >= 1); |
1968a360 LP |
3351 | |
3352 | if (!status) | |
3353 | status = &dummy; | |
2e78aa99 LP |
3354 | |
3355 | for (;;) { | |
8e12a6ae LP |
3356 | zero(*status); |
3357 | ||
3358 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3359 | |
3360 | if (errno == EINTR) | |
3361 | continue; | |
3362 | ||
3363 | return -errno; | |
3364 | } | |
3365 | ||
3366 | return 0; | |
3367 | } | |
3368 | } | |
3369 | ||
97c4a07d LP |
3370 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3371 | int r; | |
3372 | siginfo_t status; | |
3373 | ||
3374 | assert(name); | |
3375 | assert(pid > 1); | |
3376 | ||
d87be9b0 LP |
3377 | r = wait_for_terminate(pid, &status); |
3378 | if (r < 0) { | |
97c4a07d LP |
3379 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3380 | return r; | |
3381 | } | |
3382 | ||
3383 | if (status.si_code == CLD_EXITED) { | |
3384 | if (status.si_status != 0) { | |
3385 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3386 | return status.si_status; |
97c4a07d LP |
3387 | } |
3388 | ||
3389 | log_debug("%s succeeded.", name); | |
3390 | return 0; | |
3391 | ||
3392 | } else if (status.si_code == CLD_KILLED || | |
3393 | status.si_code == CLD_DUMPED) { | |
3394 | ||
3395 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3396 | return -EPROTO; | |
3397 | } | |
3398 | ||
3399 | log_warning("%s failed due to unknown reason.", name); | |
3400 | return -EPROTO; | |
97c4a07d LP |
3401 | } |
3402 | ||
919ce0b7 | 3403 | noreturn void freeze(void) { |
720ce21d LP |
3404 | |
3405 | /* Make sure nobody waits for us on a socket anymore */ | |
3406 | close_all_fds(NULL, 0); | |
3407 | ||
c29597a1 LP |
3408 | sync(); |
3409 | ||
3c14d26c LP |
3410 | for (;;) |
3411 | pause(); | |
3412 | } | |
3413 | ||
00dc5d76 LP |
3414 | bool null_or_empty(struct stat *st) { |
3415 | assert(st); | |
3416 | ||
3417 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3418 | return true; | |
3419 | ||
c8f26f42 | 3420 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3421 | return true; |
3422 | ||
3423 | return false; | |
3424 | } | |
3425 | ||
83096483 LP |
3426 | int null_or_empty_path(const char *fn) { |
3427 | struct stat st; | |
3428 | ||
3429 | assert(fn); | |
3430 | ||
3431 | if (stat(fn, &st) < 0) | |
3432 | return -errno; | |
3433 | ||
3434 | return null_or_empty(&st); | |
3435 | } | |
3436 | ||
a247755d | 3437 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3438 | int nfd; |
3439 | DIR *d; | |
3440 | ||
dd94c17e LP |
3441 | assert(!(flags & O_CREAT)); |
3442 | ||
3443 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
73836c5c | 3444 | if (nfd < 0) |
c4731d11 LP |
3445 | return NULL; |
3446 | ||
73836c5c LP |
3447 | d = fdopendir(nfd); |
3448 | if (!d) { | |
c4731d11 LP |
3449 | close_nointr_nofail(nfd); |
3450 | return NULL; | |
3451 | } | |
3452 | ||
3453 | return d; | |
3b63d2d3 LP |
3454 | } |
3455 | ||
8a0867d6 LP |
3456 | int signal_from_string_try_harder(const char *s) { |
3457 | int signo; | |
3458 | assert(s); | |
3459 | ||
73836c5c LP |
3460 | signo = signal_from_string(s); |
3461 | if (signo <= 0) | |
8a0867d6 LP |
3462 | if (startswith(s, "SIG")) |
3463 | return signal_from_string(s+3); | |
3464 | ||
3465 | return signo; | |
3466 | } | |
3467 | ||
383182b5 | 3468 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
22f5f628 DR |
3469 | _cleanup_free_ char *t = NULL, *u = NULL; |
3470 | char *dn; | |
3471 | size_t enc_len; | |
e23a0ce8 | 3472 | |
383182b5 DR |
3473 | u = unquote(tagvalue, "\"\'"); |
3474 | if (u == NULL) | |
3475 | return NULL; | |
e23a0ce8 | 3476 | |
1d5989fd | 3477 | enc_len = strlen(u) * 4 + 1; |
22f5f628 | 3478 | t = new(char, enc_len); |
383182b5 DR |
3479 | if (t == NULL) |
3480 | return NULL; | |
e23a0ce8 | 3481 | |
8f6ce71f | 3482 | if (encode_devnode_name(u, t, enc_len) < 0) |
22f5f628 | 3483 | return NULL; |
e23a0ce8 | 3484 | |
22f5f628 | 3485 | if (asprintf(&dn, "/dev/disk/by-%s/%s", by, t) < 0) |
383182b5 | 3486 | return NULL; |
e23a0ce8 | 3487 | |
383182b5 DR |
3488 | return dn; |
3489 | } | |
e23a0ce8 | 3490 | |
383182b5 | 3491 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3492 | assert(p); |
3493 | ||
383182b5 DR |
3494 | if (startswith(p, "LABEL=")) |
3495 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3496 | |
383182b5 DR |
3497 | if (startswith(p, "UUID=")) |
3498 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3499 | |
84cc2abf DR |
3500 | if (startswith(p, "PARTUUID=")) |
3501 | return tag_to_udev_node(p+9, "partuuid"); | |
3502 | ||
3503 | if (startswith(p, "PARTLABEL=")) | |
3504 | return tag_to_udev_node(p+10, "partlabel"); | |
3505 | ||
e23a0ce8 LP |
3506 | return strdup(p); |
3507 | } | |
3508 | ||
f212ac12 LP |
3509 | bool tty_is_vc(const char *tty) { |
3510 | assert(tty); | |
3511 | ||
3512 | if (startswith(tty, "/dev/")) | |
3513 | tty += 5; | |
3514 | ||
98a28fef LP |
3515 | return vtnr_from_tty(tty) >= 0; |
3516 | } | |
3517 | ||
d1122ad5 LP |
3518 | bool tty_is_console(const char *tty) { |
3519 | assert(tty); | |
3520 | ||
3521 | if (startswith(tty, "/dev/")) | |
3522 | tty += 5; | |
3523 | ||
3524 | return streq(tty, "console"); | |
3525 | } | |
3526 | ||
98a28fef LP |
3527 | int vtnr_from_tty(const char *tty) { |
3528 | int i, r; | |
3529 | ||
3530 | assert(tty); | |
3531 | ||
3532 | if (startswith(tty, "/dev/")) | |
3533 | tty += 5; | |
3534 | ||
3535 | if (!startswith(tty, "tty") ) | |
3536 | return -EINVAL; | |
3537 | ||
3538 | if (tty[3] < '0' || tty[3] > '9') | |
3539 | return -EINVAL; | |
3540 | ||
3541 | r = safe_atoi(tty+3, &i); | |
3542 | if (r < 0) | |
3543 | return r; | |
3544 | ||
3545 | if (i < 0 || i > 63) | |
3546 | return -EINVAL; | |
3547 | ||
3548 | return i; | |
f212ac12 LP |
3549 | } |
3550 | ||
21baf21a MS |
3551 | char *resolve_dev_console(char **active) { |
3552 | char *tty; | |
3553 | ||
3554 | /* Resolve where /dev/console is pointing to, if /sys is actually ours | |
3555 | * (i.e. not read-only-mounted which is a sign for container setups) */ | |
3556 | ||
3557 | if (path_is_read_only_fs("/sys") > 0) | |
3558 | return NULL; | |
3559 | ||
3560 | if (read_one_line_file("/sys/class/tty/console/active", active) < 0) | |
3561 | return NULL; | |
3562 | ||
3563 | /* If multiple log outputs are configured the last one is what | |
3564 | * /dev/console points to */ | |
3565 | tty = strrchr(*active, ' '); | |
3566 | if (tty) | |
3567 | tty++; | |
3568 | else | |
3569 | tty = *active; | |
3570 | ||
8aa5429a OB |
3571 | if (streq(tty, "tty0")) { |
3572 | char *tmp; | |
3573 | ||
3574 | /* Get the active VC (e.g. tty1) */ | |
3575 | if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) { | |
3576 | free(*active); | |
3577 | tty = *active = tmp; | |
3578 | } | |
3579 | } | |
3580 | ||
21baf21a MS |
3581 | return tty; |
3582 | } | |
3583 | ||
3043935f | 3584 | bool tty_is_vc_resolve(const char *tty) { |
9588bc32 | 3585 | _cleanup_free_ char *active = NULL; |
3030ccd7 | 3586 | |
e3aa71c3 LP |
3587 | assert(tty); |
3588 | ||
3589 | if (startswith(tty, "/dev/")) | |
3590 | tty += 5; | |
3591 | ||
21baf21a MS |
3592 | if (streq(tty, "console")) { |
3593 | tty = resolve_dev_console(&active); | |
3594 | if (!tty) | |
3595 | return false; | |
3596 | } | |
3030ccd7 | 3597 | |
9588bc32 | 3598 | return tty_is_vc(tty); |
3043935f LP |
3599 | } |
3600 | ||
3601 | const char *default_term_for_tty(const char *tty) { | |
3602 | assert(tty); | |
3603 | ||
acda6a05 | 3604 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3605 | } |
3606 | ||
87d2c1ff | 3607 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3608 | assert(de); |
3609 | ||
3610 | if (ignore_file(de->d_name)) | |
3611 | return false; | |
3612 | ||
3613 | if (de->d_type != DT_REG && | |
3614 | de->d_type != DT_LNK && | |
3615 | de->d_type != DT_UNKNOWN) | |
3616 | return false; | |
3617 | ||
3618 | return true; | |
3619 | } | |
3620 | ||
87d2c1ff LP |
3621 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3622 | assert(de); | |
3623 | ||
a228a22f LP |
3624 | if (de->d_type != DT_REG && |
3625 | de->d_type != DT_LNK && | |
3626 | de->d_type != DT_UNKNOWN) | |
3627 | return false; | |
3628 | ||
3629 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3630 | return false; |
3631 | ||
3632 | return endswith(de->d_name, suffix); | |
3633 | } | |
3634 | ||
83cc030f LP |
3635 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
3636 | DIR *_d = NULL; | |
3637 | struct dirent *de; | |
3638 | Hashmap *pids = NULL; | |
3639 | ||
3640 | assert(directory); | |
3641 | ||
650001c6 JJ |
3642 | /* Executes all binaries in a directory in parallel and |
3643 | * waits for them to finish. */ | |
83cc030f LP |
3644 | |
3645 | if (!d) { | |
3646 | if (!(_d = opendir(directory))) { | |
3647 | ||
3648 | if (errno == ENOENT) | |
3649 | return; | |
3650 | ||
3651 | log_error("Failed to enumerate directory %s: %m", directory); | |
3652 | return; | |
3653 | } | |
3654 | ||
3655 | d = _d; | |
3656 | } | |
3657 | ||
3658 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
3659 | log_error("Failed to allocate set."); | |
3660 | goto finish; | |
3661 | } | |
3662 | ||
3663 | while ((de = readdir(d))) { | |
3664 | char *path; | |
3665 | pid_t pid; | |
3666 | int k; | |
3667 | ||
fb19a739 | 3668 | if (!dirent_is_file(de)) |
83cc030f LP |
3669 | continue; |
3670 | ||
3671 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 3672 | log_oom(); |
83cc030f LP |
3673 | continue; |
3674 | } | |
3675 | ||
3676 | if ((pid = fork()) < 0) { | |
3677 | log_error("Failed to fork: %m"); | |
3678 | free(path); | |
3679 | continue; | |
3680 | } | |
3681 | ||
3682 | if (pid == 0) { | |
3683 | char *_argv[2]; | |
3684 | /* Child */ | |
3685 | ||
3686 | if (!argv) { | |
3687 | _argv[0] = path; | |
3688 | _argv[1] = NULL; | |
3689 | argv = _argv; | |
3690 | } else | |
6edd7d0a | 3691 | argv[0] = path; |
83cc030f LP |
3692 | |
3693 | execv(path, argv); | |
3694 | ||
3695 | log_error("Failed to execute %s: %m", path); | |
3696 | _exit(EXIT_FAILURE); | |
3697 | } | |
3698 | ||
3699 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
3700 | ||
3701 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
3702 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
3703 | free(path); | |
3704 | } | |
3705 | } | |
3706 | ||
3707 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 3708 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
b92bea5d | 3709 | siginfo_t si = {}; |
83cc030f LP |
3710 | char *path; |
3711 | ||
ec3f9b53 | 3712 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
3713 | |
3714 | if (errno == EINTR) | |
3715 | continue; | |
3716 | ||
3717 | log_error("waitid() failed: %m"); | |
3718 | goto finish; | |
3719 | } | |
3720 | ||
3721 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 3722 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
3723 | if (si.si_code == CLD_EXITED) |
3724 | log_error("%s exited with exit status %i.", path, si.si_status); | |
3725 | else | |
3726 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
3727 | } else | |
3728 | log_debug("%s exited successfully.", path); | |
3729 | ||
3730 | free(path); | |
3731 | } | |
3732 | } | |
3733 | ||
3734 | finish: | |
3735 | if (_d) | |
3736 | closedir(_d); | |
3737 | ||
3738 | if (pids) | |
3739 | hashmap_free_free(pids); | |
3740 | } | |
3741 | ||
430c18ed LP |
3742 | int kill_and_sigcont(pid_t pid, int sig) { |
3743 | int r; | |
3744 | ||
3745 | r = kill(pid, sig) < 0 ? -errno : 0; | |
3746 | ||
3747 | if (r >= 0) | |
3748 | kill(pid, SIGCONT); | |
3749 | ||
3750 | return r; | |
3751 | } | |
3752 | ||
05feefe0 LP |
3753 | bool nulstr_contains(const char*nulstr, const char *needle) { |
3754 | const char *i; | |
3755 | ||
3756 | if (!nulstr) | |
3757 | return false; | |
3758 | ||
3759 | NULSTR_FOREACH(i, nulstr) | |
3760 | if (streq(i, needle)) | |
3761 | return true; | |
3762 | ||
3763 | return false; | |
3764 | } | |
3765 | ||
6faa1114 | 3766 | bool plymouth_running(void) { |
9408a2d2 | 3767 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
3768 | } |
3769 | ||
9beb3f4d LP |
3770 | char* strshorten(char *s, size_t l) { |
3771 | assert(s); | |
3772 | ||
3773 | if (l < strlen(s)) | |
3774 | s[l] = 0; | |
3775 | ||
3776 | return s; | |
3777 | } | |
3778 | ||
3779 | static bool hostname_valid_char(char c) { | |
3780 | return | |
3781 | (c >= 'a' && c <= 'z') || | |
3782 | (c >= 'A' && c <= 'Z') || | |
3783 | (c >= '0' && c <= '9') || | |
3784 | c == '-' || | |
3785 | c == '_' || | |
3786 | c == '.'; | |
3787 | } | |
3788 | ||
3789 | bool hostname_is_valid(const char *s) { | |
3790 | const char *p; | |
aa3c5cf8 | 3791 | bool dot; |
9beb3f4d LP |
3792 | |
3793 | if (isempty(s)) | |
3794 | return false; | |
3795 | ||
aa3c5cf8 LP |
3796 | for (p = s, dot = true; *p; p++) { |
3797 | if (*p == '.') { | |
3798 | if (dot) | |
3799 | return false; | |
3800 | ||
3801 | dot = true; | |
3802 | } else { | |
3803 | if (!hostname_valid_char(*p)) | |
3804 | return false; | |
3805 | ||
3806 | dot = false; | |
3807 | } | |
3808 | } | |
3809 | ||
3810 | if (dot) | |
3811 | return false; | |
9beb3f4d LP |
3812 | |
3813 | if (p-s > HOST_NAME_MAX) | |
3814 | return false; | |
3815 | ||
3816 | return true; | |
3817 | } | |
3818 | ||
e724b063 | 3819 | char* hostname_cleanup(char *s, bool lowercase) { |
9beb3f4d | 3820 | char *p, *d; |
cec4ead9 LP |
3821 | bool dot; |
3822 | ||
3823 | for (p = s, d = s, dot = true; *p; p++) { | |
3824 | if (*p == '.') { | |
e724b063 | 3825 | if (dot) |
cec4ead9 | 3826 | continue; |
9beb3f4d | 3827 | |
e724b063 | 3828 | *(d++) = '.'; |
cec4ead9 | 3829 | dot = true; |
e724b063 LP |
3830 | } else if (hostname_valid_char(*p)) { |
3831 | *(d++) = lowercase ? tolower(*p) : *p; | |
cec4ead9 | 3832 | dot = false; |
e724b063 | 3833 | } |
cec4ead9 | 3834 | |
cec4ead9 | 3835 | } |
9beb3f4d | 3836 | |
e724b063 LP |
3837 | if (dot && d > s) |
3838 | d[-1] = 0; | |
3839 | else | |
3840 | *d = 0; | |
3841 | ||
9beb3f4d | 3842 | strshorten(s, HOST_NAME_MAX); |
cec4ead9 | 3843 | |
9beb3f4d LP |
3844 | return s; |
3845 | } | |
3846 | ||
1325aa42 | 3847 | int pipe_eof(int fd) { |
b92bea5d ZJS |
3848 | struct pollfd pollfd = { |
3849 | .fd = fd, | |
3850 | .events = POLLIN|POLLHUP, | |
3851 | }; | |
1325aa42 | 3852 | |
d37a91e8 LP |
3853 | int r; |
3854 | ||
1325aa42 LP |
3855 | r = poll(&pollfd, 1, 0); |
3856 | if (r < 0) | |
3857 | return -errno; | |
3858 | ||
3859 | if (r == 0) | |
3860 | return 0; | |
3861 | ||
3862 | return pollfd.revents & POLLHUP; | |
3863 | } | |
3864 | ||
8f2d43a0 | 3865 | int fd_wait_for_event(int fd, int event, usec_t t) { |
968d3d24 | 3866 | |
b92bea5d ZJS |
3867 | struct pollfd pollfd = { |
3868 | .fd = fd, | |
3869 | .events = event, | |
3870 | }; | |
df50185b | 3871 | |
968d3d24 LP |
3872 | struct timespec ts; |
3873 | int r; | |
3874 | ||
3875 | r = ppoll(&pollfd, 1, t == (usec_t) -1 ? NULL : timespec_store(&ts, t), NULL); | |
df50185b LP |
3876 | if (r < 0) |
3877 | return -errno; | |
3878 | ||
3879 | if (r == 0) | |
3880 | return 0; | |
3881 | ||
3882 | return pollfd.revents; | |
3883 | } | |
3884 | ||
5a3ab509 LP |
3885 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
3886 | FILE *f; | |
3887 | char *t; | |
3888 | const char *fn; | |
3889 | size_t k; | |
3890 | int fd; | |
3891 | ||
3892 | assert(path); | |
3893 | assert(_f); | |
3894 | assert(_temp_path); | |
3895 | ||
3896 | t = new(char, strlen(path) + 1 + 6 + 1); | |
3897 | if (!t) | |
3898 | return -ENOMEM; | |
3899 | ||
2b6bf07d ZJS |
3900 | fn = basename(path); |
3901 | k = fn - path; | |
5a3ab509 LP |
3902 | memcpy(t, path, k); |
3903 | t[k] = '.'; | |
3904 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
3905 | ||
2d5bdf5b | 3906 | fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC); |
5a3ab509 LP |
3907 | if (fd < 0) { |
3908 | free(t); | |
3909 | return -errno; | |
3910 | } | |
3911 | ||
3912 | f = fdopen(fd, "we"); | |
3913 | if (!f) { | |
3914 | unlink(t); | |
3915 | free(t); | |
3916 | return -errno; | |
3917 | } | |
3918 | ||
3919 | *_f = f; | |
3920 | *_temp_path = t; | |
3921 | ||
3922 | return 0; | |
3923 | } | |
3924 | ||
6ea832a2 | 3925 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
3926 | assert(fd >= 0); |
3927 | ||
6ea832a2 LP |
3928 | if (ioctl(fd, TIOCVHANGUP) < 0) |
3929 | return -errno; | |
3930 | ||
3931 | return 0; | |
3932 | } | |
3933 | ||
3934 | int terminal_vhangup(const char *name) { | |
3935 | int fd, r; | |
3936 | ||
3937 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
3938 | if (fd < 0) | |
3939 | return fd; | |
3940 | ||
3941 | r = terminal_vhangup_fd(fd); | |
3942 | close_nointr_nofail(fd); | |
3943 | ||
3944 | return r; | |
3945 | } | |
3946 | ||
3947 | int vt_disallocate(const char *name) { | |
3948 | int fd, r; | |
3949 | unsigned u; | |
6ea832a2 LP |
3950 | |
3951 | /* Deallocate the VT if possible. If not possible | |
3952 | * (i.e. because it is the active one), at least clear it | |
3953 | * entirely (including the scrollback buffer) */ | |
3954 | ||
b83bc4e9 LP |
3955 | if (!startswith(name, "/dev/")) |
3956 | return -EINVAL; | |
3957 | ||
3958 | if (!tty_is_vc(name)) { | |
3959 | /* So this is not a VT. I guess we cannot deallocate | |
3960 | * it then. But let's at least clear the screen */ | |
3961 | ||
3962 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
3963 | if (fd < 0) | |
3964 | return fd; | |
3965 | ||
8585357a LP |
3966 | loop_write(fd, |
3967 | "\033[r" /* clear scrolling region */ | |
3968 | "\033[H" /* move home */ | |
3969 | "\033[2J", /* clear screen */ | |
3970 | 10, false); | |
b83bc4e9 LP |
3971 | close_nointr_nofail(fd); |
3972 | ||
3973 | return 0; | |
3974 | } | |
6ea832a2 LP |
3975 | |
3976 | if (!startswith(name, "/dev/tty")) | |
3977 | return -EINVAL; | |
3978 | ||
3979 | r = safe_atou(name+8, &u); | |
3980 | if (r < 0) | |
3981 | return r; | |
3982 | ||
3983 | if (u <= 0) | |
b83bc4e9 | 3984 | return -EINVAL; |
6ea832a2 | 3985 | |
b83bc4e9 | 3986 | /* Try to deallocate */ |
6ea832a2 LP |
3987 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
3988 | if (fd < 0) | |
3989 | return fd; | |
3990 | ||
3991 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 3992 | close_nointr_nofail(fd); |
6ea832a2 | 3993 | |
b83bc4e9 LP |
3994 | if (r >= 0) |
3995 | return 0; | |
6ea832a2 | 3996 | |
b83bc4e9 | 3997 | if (errno != EBUSY) |
6ea832a2 | 3998 | return -errno; |
6ea832a2 | 3999 | |
b83bc4e9 LP |
4000 | /* Couldn't deallocate, so let's clear it fully with |
4001 | * scrollback */ | |
4002 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4003 | if (fd < 0) |
b83bc4e9 | 4004 | return fd; |
6ea832a2 | 4005 | |
8585357a LP |
4006 | loop_write(fd, |
4007 | "\033[r" /* clear scrolling region */ | |
4008 | "\033[H" /* move home */ | |
4009 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4010 | 10, false); | |
b83bc4e9 | 4011 | close_nointr_nofail(fd); |
6ea832a2 | 4012 | |
b83bc4e9 | 4013 | return 0; |
6ea832a2 LP |
4014 | } |
4015 | ||
51045322 LP |
4016 | int copy_file(const char *from, const char *to, int flags) { |
4017 | _cleanup_close_ int fdf = -1; | |
4018 | int r, fdt; | |
34ca941c LP |
4019 | |
4020 | assert(from); | |
4021 | assert(to); | |
4022 | ||
4023 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4024 | if (fdf < 0) | |
4025 | return -errno; | |
4026 | ||
51045322 LP |
4027 | fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); |
4028 | if (fdt < 0) | |
34ca941c | 4029 | return -errno; |
34ca941c LP |
4030 | |
4031 | for (;;) { | |
4032 | char buf[PIPE_BUF]; | |
4033 | ssize_t n, k; | |
4034 | ||
4035 | n = read(fdf, buf, sizeof(buf)); | |
4036 | if (n < 0) { | |
4037 | r = -errno; | |
4038 | ||
34ca941c LP |
4039 | close_nointr(fdt); |
4040 | unlink(to); | |
4041 | ||
4042 | return r; | |
4043 | } | |
4044 | ||
4045 | if (n == 0) | |
4046 | break; | |
4047 | ||
4048 | errno = 0; | |
4049 | k = loop_write(fdt, buf, n, false); | |
4050 | if (n != k) { | |
4051 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4052 | ||
34ca941c | 4053 | close_nointr(fdt); |
34ca941c | 4054 | unlink(to); |
51045322 | 4055 | |
34ca941c LP |
4056 | return r; |
4057 | } | |
4058 | } | |
4059 | ||
34ca941c LP |
4060 | r = close_nointr(fdt); |
4061 | ||
4062 | if (r < 0) { | |
4063 | unlink(to); | |
4064 | return r; | |
4065 | } | |
4066 | ||
4067 | return 0; | |
4068 | } | |
4069 | ||
424a19f8 LP |
4070 | int symlink_atomic(const char *from, const char *to) { |
4071 | char *x; | |
4072 | _cleanup_free_ char *t; | |
34ca941c LP |
4073 | const char *fn; |
4074 | size_t k; | |
9bf3b535 | 4075 | uint64_t u; |
34ca941c LP |
4076 | unsigned i; |
4077 | int r; | |
4078 | ||
4079 | assert(from); | |
4080 | assert(to); | |
4081 | ||
4082 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4083 | if (!t) | |
4084 | return -ENOMEM; | |
4085 | ||
2b6bf07d | 4086 | fn = basename(to); |
34ca941c LP |
4087 | k = fn-to; |
4088 | memcpy(t, to, k); | |
4089 | t[k] = '.'; | |
4090 | x = stpcpy(t+k+1, fn); | |
4091 | ||
9bf3b535 | 4092 | u = random_u64(); |
34ca941c | 4093 | for (i = 0; i < 16; i++) { |
9bf3b535 LP |
4094 | *(x++) = hexchar(u & 0xF); |
4095 | u >>= 4; | |
34ca941c LP |
4096 | } |
4097 | ||
4098 | *x = 0; | |
4099 | ||
424a19f8 LP |
4100 | if (symlink(from, t) < 0) |
4101 | return -errno; | |
34ca941c LP |
4102 | |
4103 | if (rename(t, to) < 0) { | |
4104 | r = -errno; | |
4105 | unlink(t); | |
34ca941c LP |
4106 | return r; |
4107 | } | |
4108 | ||
424a19f8 | 4109 | return 0; |
34ca941c LP |
4110 | } |
4111 | ||
4d6d6518 LP |
4112 | bool display_is_local(const char *display) { |
4113 | assert(display); | |
4114 | ||
4115 | return | |
4116 | display[0] == ':' && | |
4117 | display[1] >= '0' && | |
4118 | display[1] <= '9'; | |
4119 | } | |
4120 | ||
4121 | int socket_from_display(const char *display, char **path) { | |
4122 | size_t k; | |
4123 | char *f, *c; | |
4124 | ||
4125 | assert(display); | |
4126 | assert(path); | |
4127 | ||
4128 | if (!display_is_local(display)) | |
4129 | return -EINVAL; | |
4130 | ||
4131 | k = strspn(display+1, "0123456789"); | |
4132 | ||
4133 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4134 | if (!f) | |
4135 | return -ENOMEM; | |
4136 | ||
4137 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4138 | memcpy(c, display+1, k); | |
4139 | c[k] = 0; | |
4140 | ||
4141 | *path = f; | |
4142 | ||
4143 | return 0; | |
4144 | } | |
4145 | ||
d05c5031 LP |
4146 | int get_user_creds( |
4147 | const char **username, | |
4148 | uid_t *uid, gid_t *gid, | |
4149 | const char **home, | |
4150 | const char **shell) { | |
4151 | ||
1cccf435 | 4152 | struct passwd *p; |
ddd88763 | 4153 | uid_t u; |
1cccf435 MV |
4154 | |
4155 | assert(username); | |
4156 | assert(*username); | |
1cccf435 MV |
4157 | |
4158 | /* We enforce some special rules for uid=0: in order to avoid | |
4159 | * NSS lookups for root we hardcode its data. */ | |
4160 | ||
4161 | if (streq(*username, "root") || streq(*username, "0")) { | |
4162 | *username = "root"; | |
4b67834e LP |
4163 | |
4164 | if (uid) | |
4165 | *uid = 0; | |
4166 | ||
4167 | if (gid) | |
4168 | *gid = 0; | |
4169 | ||
4170 | if (home) | |
4171 | *home = "/root"; | |
d05c5031 LP |
4172 | |
4173 | if (shell) | |
4174 | *shell = "/bin/sh"; | |
4175 | ||
1cccf435 MV |
4176 | return 0; |
4177 | } | |
4178 | ||
ddd88763 | 4179 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4180 | errno = 0; |
ddd88763 | 4181 | p = getpwuid(u); |
1cccf435 MV |
4182 | |
4183 | /* If there are multiple users with the same id, make | |
4184 | * sure to leave $USER to the configured value instead | |
4185 | * of the first occurrence in the database. However if | |
4186 | * the uid was configured by a numeric uid, then let's | |
4187 | * pick the real username from /etc/passwd. */ | |
4188 | if (p) | |
4189 | *username = p->pw_name; | |
4190 | } else { | |
4191 | errno = 0; | |
4192 | p = getpwnam(*username); | |
4193 | } | |
4194 | ||
4195 | if (!p) | |
8333c77e | 4196 | return errno > 0 ? -errno : -ESRCH; |
1cccf435 | 4197 | |
4b67834e LP |
4198 | if (uid) |
4199 | *uid = p->pw_uid; | |
4200 | ||
4201 | if (gid) | |
4202 | *gid = p->pw_gid; | |
4203 | ||
4204 | if (home) | |
4205 | *home = p->pw_dir; | |
4206 | ||
d05c5031 LP |
4207 | if (shell) |
4208 | *shell = p->pw_shell; | |
4209 | ||
4b67834e LP |
4210 | return 0; |
4211 | } | |
4212 | ||
59164be4 LP |
4213 | char* uid_to_name(uid_t uid) { |
4214 | struct passwd *p; | |
4215 | char *r; | |
4216 | ||
4217 | if (uid == 0) | |
4218 | return strdup("root"); | |
4219 | ||
4220 | p = getpwuid(uid); | |
4221 | if (p) | |
4222 | return strdup(p->pw_name); | |
4223 | ||
4224 | if (asprintf(&r, "%lu", (unsigned long) uid) < 0) | |
4225 | return NULL; | |
4226 | ||
4227 | return r; | |
4228 | } | |
4229 | ||
4468addc LP |
4230 | char* gid_to_name(gid_t gid) { |
4231 | struct group *p; | |
4232 | char *r; | |
4233 | ||
4234 | if (gid == 0) | |
4235 | return strdup("root"); | |
4236 | ||
4237 | p = getgrgid(gid); | |
4238 | if (p) | |
4239 | return strdup(p->gr_name); | |
4240 | ||
4241 | if (asprintf(&r, "%lu", (unsigned long) gid) < 0) | |
4242 | return NULL; | |
4243 | ||
4244 | return r; | |
4245 | } | |
4246 | ||
4b67834e LP |
4247 | int get_group_creds(const char **groupname, gid_t *gid) { |
4248 | struct group *g; | |
4249 | gid_t id; | |
4250 | ||
4251 | assert(groupname); | |
4252 | ||
4253 | /* We enforce some special rules for gid=0: in order to avoid | |
4254 | * NSS lookups for root we hardcode its data. */ | |
4255 | ||
4256 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4257 | *groupname = "root"; | |
4258 | ||
4259 | if (gid) | |
4260 | *gid = 0; | |
4261 | ||
4262 | return 0; | |
4263 | } | |
4264 | ||
4265 | if (parse_gid(*groupname, &id) >= 0) { | |
4266 | errno = 0; | |
4267 | g = getgrgid(id); | |
4268 | ||
4269 | if (g) | |
4270 | *groupname = g->gr_name; | |
4271 | } else { | |
4272 | errno = 0; | |
4273 | g = getgrnam(*groupname); | |
4274 | } | |
4275 | ||
4276 | if (!g) | |
8333c77e | 4277 | return errno > 0 ? -errno : -ESRCH; |
4b67834e LP |
4278 | |
4279 | if (gid) | |
4280 | *gid = g->gr_gid; | |
4281 | ||
1cccf435 MV |
4282 | return 0; |
4283 | } | |
4284 | ||
4468addc LP |
4285 | int in_gid(gid_t gid) { |
4286 | gid_t *gids; | |
43673799 LP |
4287 | int ngroups_max, r, i; |
4288 | ||
43673799 LP |
4289 | if (getgid() == gid) |
4290 | return 1; | |
4291 | ||
4292 | if (getegid() == gid) | |
4293 | return 1; | |
4294 | ||
4295 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4296 | assert(ngroups_max > 0); | |
4297 | ||
4298 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4299 | ||
4300 | r = getgroups(ngroups_max, gids); | |
4301 | if (r < 0) | |
4302 | return -errno; | |
4303 | ||
4304 | for (i = 0; i < r; i++) | |
4305 | if (gids[i] == gid) | |
4306 | return 1; | |
4307 | ||
4308 | return 0; | |
4309 | } | |
4310 | ||
4468addc LP |
4311 | int in_group(const char *name) { |
4312 | int r; | |
4313 | gid_t gid; | |
4314 | ||
4315 | r = get_group_creds(&name, &gid); | |
4316 | if (r < 0) | |
4317 | return r; | |
4318 | ||
4319 | return in_gid(gid); | |
4320 | } | |
4321 | ||
8092a428 | 4322 | int glob_exists(const char *path) { |
7fd1b19b | 4323 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 4324 | int k; |
8092a428 LP |
4325 | |
4326 | assert(path); | |
4327 | ||
8092a428 LP |
4328 | errno = 0; |
4329 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4330 | ||
4331 | if (k == GLOB_NOMATCH) | |
8d98da3f | 4332 | return 0; |
8092a428 | 4333 | else if (k == GLOB_NOSPACE) |
8d98da3f | 4334 | return -ENOMEM; |
8092a428 | 4335 | else if (k == 0) |
8d98da3f | 4336 | return !strv_isempty(g.gl_pathv); |
8092a428 | 4337 | else |
8d98da3f ZJS |
4338 | return errno ? -errno : -EIO; |
4339 | } | |
8092a428 | 4340 | |
8d98da3f ZJS |
4341 | int glob_extend(char ***strv, const char *path) { |
4342 | _cleanup_globfree_ glob_t g = {}; | |
4343 | int k; | |
4344 | char **p; | |
4345 | ||
4346 | errno = 0; | |
a8ccacf5 | 4347 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
4348 | |
4349 | if (k == GLOB_NOMATCH) | |
4350 | return -ENOENT; | |
4351 | else if (k == GLOB_NOSPACE) | |
4352 | return -ENOMEM; | |
4353 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
4354 | return errno ? -errno : -EIO; | |
4355 | ||
4356 | STRV_FOREACH(p, g.gl_pathv) { | |
4357 | k = strv_extend(strv, *p); | |
4358 | if (k < 0) | |
4359 | break; | |
4360 | } | |
4361 | ||
4362 | return k; | |
8092a428 LP |
4363 | } |
4364 | ||
83096483 LP |
4365 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4366 | struct stat st; | |
4367 | ||
4368 | assert(d); | |
4369 | assert(de); | |
4370 | ||
4371 | if (de->d_type != DT_UNKNOWN) | |
4372 | return 0; | |
4373 | ||
4374 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4375 | return -errno; | |
4376 | ||
4377 | de->d_type = | |
4378 | S_ISREG(st.st_mode) ? DT_REG : | |
4379 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4380 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4381 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4382 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4383 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4384 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4385 | DT_UNKNOWN; | |
4386 | ||
4387 | return 0; | |
4388 | } | |
4389 | ||
4390 | int in_search_path(const char *path, char **search) { | |
893fa014 ZJS |
4391 | char **i; |
4392 | _cleanup_free_ char *parent = NULL; | |
83096483 LP |
4393 | int r; |
4394 | ||
9eb977db | 4395 | r = path_get_parent(path, &parent); |
83096483 LP |
4396 | if (r < 0) |
4397 | return r; | |
4398 | ||
893fa014 ZJS |
4399 | STRV_FOREACH(i, search) |
4400 | if (path_equal(parent, *i)) | |
4401 | return 1; | |
83096483 | 4402 | |
893fa014 | 4403 | return 0; |
83096483 LP |
4404 | } |
4405 | ||
034a2a52 | 4406 | int get_files_in_directory(const char *path, char ***list) { |
893fa014 ZJS |
4407 | _cleanup_closedir_ DIR *d = NULL; |
4408 | size_t bufsize = 0, n = 0; | |
4409 | _cleanup_strv_free_ char **l = NULL; | |
034a2a52 LP |
4410 | |
4411 | assert(path); | |
d60ef526 LP |
4412 | |
4413 | /* Returns all files in a directory in *list, and the number | |
4414 | * of files as return value. If list is NULL returns only the | |
893fa014 | 4415 | * number. */ |
034a2a52 LP |
4416 | |
4417 | d = opendir(path); | |
8ea913b2 LP |
4418 | if (!d) |
4419 | return -errno; | |
4420 | ||
034a2a52 | 4421 | for (;;) { |
7d5e9c0f | 4422 | struct dirent *de; |
034a2a52 | 4423 | |
3fd11280 FW |
4424 | errno = 0; |
4425 | de = readdir(d); | |
4426 | if (!de && errno != 0) | |
4427 | return -errno; | |
034a2a52 LP |
4428 | if (!de) |
4429 | break; | |
4430 | ||
4431 | dirent_ensure_type(d, de); | |
4432 | ||
4433 | if (!dirent_is_file(de)) | |
4434 | continue; | |
4435 | ||
d60ef526 | 4436 | if (list) { |
893fa014 ZJS |
4437 | /* one extra slot is needed for the terminating NULL */ |
4438 | if (!GREEDY_REALLOC(l, bufsize, n + 2)) | |
4439 | return -ENOMEM; | |
034a2a52 | 4440 | |
893fa014 ZJS |
4441 | l[n] = strdup(de->d_name); |
4442 | if (!l[n]) | |
4443 | return -ENOMEM; | |
034a2a52 | 4444 | |
893fa014 | 4445 | l[++n] = NULL; |
d60ef526 | 4446 | } else |
893fa014 | 4447 | n++; |
034a2a52 LP |
4448 | } |
4449 | ||
893fa014 ZJS |
4450 | if (list) { |
4451 | *list = l; | |
4452 | l = NULL; /* avoid freeing */ | |
4453 | } | |
034a2a52 | 4454 | |
893fa014 | 4455 | return n; |
034a2a52 LP |
4456 | } |
4457 | ||
b7def684 | 4458 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4459 | va_list ap; |
4460 | size_t l; | |
4461 | char *r, *p; | |
4462 | ||
4463 | va_start(ap, x); | |
4464 | ||
4465 | if (x) { | |
4466 | l = strlen(x); | |
4467 | ||
4468 | for (;;) { | |
4469 | const char *t; | |
040f18ea | 4470 | size_t n; |
911a4828 LP |
4471 | |
4472 | t = va_arg(ap, const char *); | |
4473 | if (!t) | |
4474 | break; | |
4475 | ||
040f18ea | 4476 | n = strlen(t); |
e98055de LN |
4477 | if (n > ((size_t) -1) - l) { |
4478 | va_end(ap); | |
040f18ea | 4479 | return NULL; |
e98055de | 4480 | } |
040f18ea LP |
4481 | |
4482 | l += n; | |
911a4828 LP |
4483 | } |
4484 | } else | |
4485 | l = 0; | |
4486 | ||
4487 | va_end(ap); | |
4488 | ||
4489 | r = new(char, l+1); | |
4490 | if (!r) | |
4491 | return NULL; | |
4492 | ||
4493 | if (x) { | |
4494 | p = stpcpy(r, x); | |
4495 | ||
4496 | va_start(ap, x); | |
4497 | ||
4498 | for (;;) { | |
4499 | const char *t; | |
4500 | ||
4501 | t = va_arg(ap, const char *); | |
4502 | if (!t) | |
4503 | break; | |
4504 | ||
4505 | p = stpcpy(p, t); | |
4506 | } | |
8ea913b2 LP |
4507 | |
4508 | va_end(ap); | |
911a4828 LP |
4509 | } else |
4510 | r[0] = 0; | |
4511 | ||
4512 | return r; | |
4513 | } | |
4514 | ||
b636465b | 4515 | bool is_main_thread(void) { |
ec202eae | 4516 | static thread_local int cached = 0; |
b636465b LP |
4517 | |
4518 | if (_unlikely_(cached == 0)) | |
4519 | cached = getpid() == gettid() ? 1 : -1; | |
4520 | ||
4521 | return cached > 0; | |
4522 | } | |
4523 | ||
94959f0f LP |
4524 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4525 | char *p, *s; | |
4526 | int r; | |
4527 | unsigned n, m; | |
4528 | ||
4529 | assert(ret); | |
4530 | ||
4531 | /* If it has a queue this is good enough for us */ | |
4532 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4533 | return -ENOMEM; | |
4534 | ||
4535 | r = access(p, F_OK); | |
4536 | free(p); | |
4537 | ||
4538 | if (r >= 0) { | |
4539 | *ret = d; | |
4540 | return 0; | |
4541 | } | |
4542 | ||
4543 | /* If it is a partition find the originating device */ | |
4544 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4545 | return -ENOMEM; | |
4546 | ||
4547 | r = access(p, F_OK); | |
4548 | free(p); | |
4549 | ||
4550 | if (r < 0) | |
4551 | return -ENOENT; | |
4552 | ||
4553 | /* Get parent dev_t */ | |
4554 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4555 | return -ENOMEM; | |
4556 | ||
4557 | r = read_one_line_file(p, &s); | |
4558 | free(p); | |
4559 | ||
4560 | if (r < 0) | |
4561 | return r; | |
4562 | ||
4563 | r = sscanf(s, "%u:%u", &m, &n); | |
4564 | free(s); | |
4565 | ||
4566 | if (r != 2) | |
4567 | return -EINVAL; | |
4568 | ||
4569 | /* Only return this if it is really good enough for us. */ | |
4570 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4571 | return -ENOMEM; | |
4572 | ||
4573 | r = access(p, F_OK); | |
4574 | free(p); | |
4575 | ||
4576 | if (r >= 0) { | |
4577 | *ret = makedev(m, n); | |
4578 | return 0; | |
4579 | } | |
4580 | ||
4581 | return -ENOENT; | |
4582 | } | |
4583 | ||
8d53b453 | 4584 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4585 | struct stat st; |
4586 | ||
4587 | assert(p); | |
4588 | ||
4589 | if (lstat(p, &st) < 0) | |
4590 | return -errno; | |
4591 | ||
4592 | return | |
8d53b453 | 4593 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4594 | (st.st_mode & S_ISVTX); |
4595 | } | |
94959f0f | 4596 | |
f41607a6 LP |
4597 | static const char *const ioprio_class_table[] = { |
4598 | [IOPRIO_CLASS_NONE] = "none", | |
4599 | [IOPRIO_CLASS_RT] = "realtime", | |
4600 | [IOPRIO_CLASS_BE] = "best-effort", | |
4601 | [IOPRIO_CLASS_IDLE] = "idle" | |
4602 | }; | |
4603 | ||
f8b69d1d | 4604 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4605 | |
4606 | static const char *const sigchld_code_table[] = { | |
4607 | [CLD_EXITED] = "exited", | |
4608 | [CLD_KILLED] = "killed", | |
4609 | [CLD_DUMPED] = "dumped", | |
4610 | [CLD_TRAPPED] = "trapped", | |
4611 | [CLD_STOPPED] = "stopped", | |
4612 | [CLD_CONTINUED] = "continued", | |
4613 | }; | |
4614 | ||
4615 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4616 | ||
4617 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4618 | [LOG_FAC(LOG_KERN)] = "kern", | |
4619 | [LOG_FAC(LOG_USER)] = "user", | |
4620 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4621 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4622 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4623 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4624 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4625 | [LOG_FAC(LOG_NEWS)] = "news", | |
4626 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4627 | [LOG_FAC(LOG_CRON)] = "cron", | |
4628 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4629 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4630 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4631 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4632 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4633 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4634 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4635 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4636 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4637 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4638 | }; | |
4639 | ||
f8b69d1d | 4640 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4641 | |
4642 | static const char *const log_level_table[] = { | |
4643 | [LOG_EMERG] = "emerg", | |
4644 | [LOG_ALERT] = "alert", | |
4645 | [LOG_CRIT] = "crit", | |
4646 | [LOG_ERR] = "err", | |
4647 | [LOG_WARNING] = "warning", | |
4648 | [LOG_NOTICE] = "notice", | |
4649 | [LOG_INFO] = "info", | |
4650 | [LOG_DEBUG] = "debug" | |
4651 | }; | |
4652 | ||
f8b69d1d | 4653 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4654 | |
4655 | static const char* const sched_policy_table[] = { | |
4656 | [SCHED_OTHER] = "other", | |
4657 | [SCHED_BATCH] = "batch", | |
4658 | [SCHED_IDLE] = "idle", | |
4659 | [SCHED_FIFO] = "fifo", | |
4660 | [SCHED_RR] = "rr" | |
4661 | }; | |
4662 | ||
f8b69d1d | 4663 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 LP |
4664 | |
4665 | static const char* const rlimit_table[] = { | |
4666 | [RLIMIT_CPU] = "LimitCPU", | |
4667 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4668 | [RLIMIT_DATA] = "LimitDATA", | |
4669 | [RLIMIT_STACK] = "LimitSTACK", | |
4670 | [RLIMIT_CORE] = "LimitCORE", | |
4671 | [RLIMIT_RSS] = "LimitRSS", | |
4672 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4673 | [RLIMIT_AS] = "LimitAS", | |
4674 | [RLIMIT_NPROC] = "LimitNPROC", | |
4675 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4676 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4677 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4678 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4679 | [RLIMIT_NICE] = "LimitNICE", | |
4680 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4681 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4682 | }; | |
4683 | ||
4684 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4685 | ||
4686 | static const char* const ip_tos_table[] = { | |
4687 | [IPTOS_LOWDELAY] = "low-delay", | |
4688 | [IPTOS_THROUGHPUT] = "throughput", | |
4689 | [IPTOS_RELIABILITY] = "reliability", | |
4690 | [IPTOS_LOWCOST] = "low-cost", | |
4691 | }; | |
4692 | ||
f8b69d1d | 4693 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4694 | |
4e240ab0 | 4695 | static const char *const __signal_table[] = { |
f41607a6 LP |
4696 | [SIGHUP] = "HUP", |
4697 | [SIGINT] = "INT", | |
4698 | [SIGQUIT] = "QUIT", | |
4699 | [SIGILL] = "ILL", | |
4700 | [SIGTRAP] = "TRAP", | |
4701 | [SIGABRT] = "ABRT", | |
4702 | [SIGBUS] = "BUS", | |
4703 | [SIGFPE] = "FPE", | |
4704 | [SIGKILL] = "KILL", | |
4705 | [SIGUSR1] = "USR1", | |
4706 | [SIGSEGV] = "SEGV", | |
4707 | [SIGUSR2] = "USR2", | |
4708 | [SIGPIPE] = "PIPE", | |
4709 | [SIGALRM] = "ALRM", | |
4710 | [SIGTERM] = "TERM", | |
4711 | #ifdef SIGSTKFLT | |
4712 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4713 | #endif | |
4714 | [SIGCHLD] = "CHLD", | |
4715 | [SIGCONT] = "CONT", | |
4716 | [SIGSTOP] = "STOP", | |
4717 | [SIGTSTP] = "TSTP", | |
4718 | [SIGTTIN] = "TTIN", | |
4719 | [SIGTTOU] = "TTOU", | |
4720 | [SIGURG] = "URG", | |
4721 | [SIGXCPU] = "XCPU", | |
4722 | [SIGXFSZ] = "XFSZ", | |
4723 | [SIGVTALRM] = "VTALRM", | |
4724 | [SIGPROF] = "PROF", | |
4725 | [SIGWINCH] = "WINCH", | |
4726 | [SIGIO] = "IO", | |
4727 | [SIGPWR] = "PWR", | |
4728 | [SIGSYS] = "SYS" | |
4729 | }; | |
4730 | ||
4e240ab0 MS |
4731 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4732 | ||
4733 | const char *signal_to_string(int signo) { | |
ec202eae | 4734 | static thread_local char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1]; |
4e240ab0 MS |
4735 | const char *name; |
4736 | ||
4737 | name = __signal_to_string(signo); | |
4738 | if (name) | |
4739 | return name; | |
4740 | ||
4741 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
fa70beaa | 4742 | snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN); |
4e240ab0 | 4743 | else |
fa70beaa LP |
4744 | snprintf(buf, sizeof(buf), "%d", signo); |
4745 | ||
4e240ab0 MS |
4746 | return buf; |
4747 | } | |
4748 | ||
4749 | int signal_from_string(const char *s) { | |
4750 | int signo; | |
4751 | int offset = 0; | |
4752 | unsigned u; | |
4753 | ||
040f18ea | 4754 | signo = __signal_from_string(s); |
4e240ab0 MS |
4755 | if (signo > 0) |
4756 | return signo; | |
4757 | ||
4758 | if (startswith(s, "RTMIN+")) { | |
4759 | s += 6; | |
4760 | offset = SIGRTMIN; | |
4761 | } | |
4762 | if (safe_atou(s, &u) >= 0) { | |
4763 | signo = (int) u + offset; | |
4764 | if (signo > 0 && signo < _NSIG) | |
4765 | return signo; | |
4766 | } | |
4767 | return -1; | |
4768 | } | |
65457142 FC |
4769 | |
4770 | bool kexec_loaded(void) { | |
4771 | bool loaded = false; | |
4772 | char *s; | |
4773 | ||
4774 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
4775 | if (s[0] == '1') | |
4776 | loaded = true; | |
4777 | free(s); | |
4778 | } | |
4779 | return loaded; | |
4780 | } | |
fb9de93d LP |
4781 | |
4782 | int strdup_or_null(const char *a, char **b) { | |
4783 | char *c; | |
4784 | ||
4785 | assert(b); | |
4786 | ||
4787 | if (!a) { | |
4788 | *b = NULL; | |
4789 | return 0; | |
4790 | } | |
4791 | ||
4792 | c = strdup(a); | |
4793 | if (!c) | |
4794 | return -ENOMEM; | |
4795 | ||
4796 | *b = c; | |
4797 | return 0; | |
4798 | } | |
64685e0c | 4799 | |
87d2c1ff LP |
4800 | int prot_from_flags(int flags) { |
4801 | ||
4802 | switch (flags & O_ACCMODE) { | |
4803 | ||
4804 | case O_RDONLY: | |
4805 | return PROT_READ; | |
4806 | ||
4807 | case O_WRONLY: | |
4808 | return PROT_WRITE; | |
4809 | ||
4810 | case O_RDWR: | |
4811 | return PROT_READ|PROT_WRITE; | |
4812 | ||
4813 | default: | |
4814 | return -EINVAL; | |
4815 | } | |
7c99e0c1 | 4816 | } |
689b9a22 | 4817 | |
babfc091 | 4818 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 4819 | unsigned i; |
babfc091 LP |
4820 | |
4821 | static const struct { | |
4822 | const char *suffix; | |
4823 | off_t factor; | |
4824 | } table[] = { | |
32895bb3 LP |
4825 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
4826 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
4827 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
4828 | { "G", 1024ULL*1024ULL*1024ULL }, | |
4829 | { "M", 1024ULL*1024ULL }, | |
4830 | { "K", 1024ULL }, | |
4831 | }; | |
4832 | ||
4833 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
4834 | ||
4835 | if (t >= table[i].factor) { | |
4836 | snprintf(buf, l, | |
4837 | "%llu.%llu%s", | |
4838 | (unsigned long long) (t / table[i].factor), | |
4839 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
4840 | table[i].suffix); | |
4841 | ||
4842 | goto finish; | |
4843 | } | |
4844 | } | |
4845 | ||
4846 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
4847 | ||
4848 | finish: | |
4849 | buf[l-1] = 0; | |
4850 | return buf; | |
4851 | ||
4852 | } | |
55d7bfc1 LP |
4853 | |
4854 | void* memdup(const void *p, size_t l) { | |
4855 | void *r; | |
4856 | ||
4857 | assert(p); | |
4858 | ||
4859 | r = malloc(l); | |
4860 | if (!r) | |
4861 | return NULL; | |
4862 | ||
4863 | memcpy(r, p, l); | |
4864 | return r; | |
4865 | } | |
bb99a35a LP |
4866 | |
4867 | int fd_inc_sndbuf(int fd, size_t n) { | |
4868 | int r, value; | |
4869 | socklen_t l = sizeof(value); | |
4870 | ||
4871 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
92d75ca4 | 4872 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
4873 | return 0; |
4874 | ||
92d75ca4 LP |
4875 | /* If we have the privileges we will ignore the kernel limit. */ |
4876 | ||
bb99a35a | 4877 | value = (int) n; |
92d75ca4 LP |
4878 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) |
4879 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) | |
4880 | return -errno; | |
bb99a35a LP |
4881 | |
4882 | return 1; | |
4883 | } | |
4884 | ||
4885 | int fd_inc_rcvbuf(int fd, size_t n) { | |
4886 | int r, value; | |
4887 | socklen_t l = sizeof(value); | |
4888 | ||
4889 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
92d75ca4 | 4890 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
4891 | return 0; |
4892 | ||
92d75ca4 | 4893 | /* If we have the privileges we will ignore the kernel limit. */ |
bb99a35a | 4894 | |
92d75ca4 LP |
4895 | value = (int) n; |
4896 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) | |
4897 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) | |
4898 | return -errno; | |
bb99a35a LP |
4899 | return 1; |
4900 | } | |
6bb92a16 | 4901 | |
9bdc770c | 4902 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
4903 | pid_t parent_pid, agent_pid; |
4904 | int fd; | |
4905 | bool stdout_is_tty, stderr_is_tty; | |
4906 | unsigned n, i; | |
4907 | va_list ap; | |
4908 | char **l; | |
4909 | ||
4910 | assert(pid); | |
4911 | assert(path); | |
4912 | ||
4913 | parent_pid = getpid(); | |
4914 | ||
4915 | /* Spawns a temporary TTY agent, making sure it goes away when | |
4916 | * we go away */ | |
4917 | ||
4918 | agent_pid = fork(); | |
4919 | if (agent_pid < 0) | |
4920 | return -errno; | |
4921 | ||
4922 | if (agent_pid != 0) { | |
4923 | *pid = agent_pid; | |
4924 | return 0; | |
4925 | } | |
4926 | ||
4927 | /* In the child: | |
4928 | * | |
4929 | * Make sure the agent goes away when the parent dies */ | |
4930 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
4931 | _exit(EXIT_FAILURE); | |
4932 | ||
4933 | /* Check whether our parent died before we were able | |
4934 | * to set the death signal */ | |
4935 | if (getppid() != parent_pid) | |
4936 | _exit(EXIT_SUCCESS); | |
4937 | ||
4938 | /* Don't leak fds to the agent */ | |
9bdc770c | 4939 | close_all_fds(except, n_except); |
6bb92a16 LP |
4940 | |
4941 | stdout_is_tty = isatty(STDOUT_FILENO); | |
4942 | stderr_is_tty = isatty(STDERR_FILENO); | |
4943 | ||
4944 | if (!stdout_is_tty || !stderr_is_tty) { | |
4945 | /* Detach from stdout/stderr. and reopen | |
4946 | * /dev/tty for them. This is important to | |
4947 | * ensure that when systemctl is started via | |
4948 | * popen() or a similar call that expects to | |
4949 | * read EOF we actually do generate EOF and | |
4950 | * not delay this indefinitely by because we | |
4951 | * keep an unused copy of stdin around. */ | |
4952 | fd = open("/dev/tty", O_WRONLY); | |
4953 | if (fd < 0) { | |
4954 | log_error("Failed to open /dev/tty: %m"); | |
4955 | _exit(EXIT_FAILURE); | |
4956 | } | |
4957 | ||
4958 | if (!stdout_is_tty) | |
4959 | dup2(fd, STDOUT_FILENO); | |
4960 | ||
4961 | if (!stderr_is_tty) | |
4962 | dup2(fd, STDERR_FILENO); | |
4963 | ||
4964 | if (fd > 2) | |
4965 | close(fd); | |
4966 | } | |
4967 | ||
4968 | /* Count arguments */ | |
4969 | va_start(ap, path); | |
4970 | for (n = 0; va_arg(ap, char*); n++) | |
4971 | ; | |
4972 | va_end(ap); | |
4973 | ||
4974 | /* Allocate strv */ | |
4975 | l = alloca(sizeof(char *) * (n + 1)); | |
4976 | ||
4977 | /* Fill in arguments */ | |
4978 | va_start(ap, path); | |
4979 | for (i = 0; i <= n; i++) | |
4980 | l[i] = va_arg(ap, char*); | |
4981 | va_end(ap); | |
4982 | ||
4983 | execv(path, l); | |
4984 | _exit(EXIT_FAILURE); | |
4985 | } | |
68faf98c LP |
4986 | |
4987 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
4988 | struct rlimit highest, fixed; | |
4989 | ||
4990 | assert(rlim); | |
4991 | ||
4992 | if (setrlimit(resource, rlim) >= 0) | |
4993 | return 0; | |
4994 | ||
4995 | if (errno != EPERM) | |
4996 | return -errno; | |
4997 | ||
4998 | /* So we failed to set the desired setrlimit, then let's try | |
4999 | * to get as close as we can */ | |
5000 | assert_se(getrlimit(resource, &highest) == 0); | |
5001 | ||
5002 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5003 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5004 | ||
5005 | if (setrlimit(resource, &fixed) < 0) | |
5006 | return -errno; | |
5007 | ||
5008 | return 0; | |
5009 | } | |
3d9a4122 | 5010 | |
ab94af92 | 5011 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
49aa47c7 LP |
5012 | _cleanup_fclose_ FILE *f = NULL; |
5013 | char *value = NULL; | |
ab94af92 | 5014 | int r; |
ab94af92 LP |
5015 | bool done = false; |
5016 | size_t l; | |
49aa47c7 | 5017 | const char *path; |
ab94af92 | 5018 | |
49aa47c7 | 5019 | assert(pid >= 0); |
ab94af92 LP |
5020 | assert(field); |
5021 | assert(_value); | |
5022 | ||
b68fa010 | 5023 | path = procfs_file_alloca(pid, "environ"); |
ab94af92 LP |
5024 | |
5025 | f = fopen(path, "re"); | |
5026 | if (!f) | |
5027 | return -errno; | |
5028 | ||
5029 | l = strlen(field); | |
5030 | r = 0; | |
5031 | ||
5032 | do { | |
5033 | char line[LINE_MAX]; | |
5034 | unsigned i; | |
5035 | ||
5036 | for (i = 0; i < sizeof(line)-1; i++) { | |
5037 | int c; | |
5038 | ||
5039 | c = getc(f); | |
5040 | if (_unlikely_(c == EOF)) { | |
5041 | done = true; | |
5042 | break; | |
5043 | } else if (c == 0) | |
5044 | break; | |
5045 | ||
5046 | line[i] = c; | |
5047 | } | |
5048 | line[i] = 0; | |
5049 | ||
5050 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5051 | value = strdup(line + l + 1); | |
49aa47c7 LP |
5052 | if (!value) |
5053 | return -ENOMEM; | |
ab94af92 LP |
5054 | |
5055 | r = 1; | |
5056 | break; | |
5057 | } | |
5058 | ||
5059 | } while (!done); | |
5060 | ||
49aa47c7 | 5061 | *_value = value; |
ab94af92 LP |
5062 | return r; |
5063 | } | |
d889a206 | 5064 | |
49dbfa7b LP |
5065 | bool is_valid_documentation_url(const char *url) { |
5066 | assert(url); | |
5067 | ||
5068 | if (startswith(url, "http://") && url[7]) | |
5069 | return true; | |
5070 | ||
5071 | if (startswith(url, "https://") && url[8]) | |
5072 | return true; | |
5073 | ||
5074 | if (startswith(url, "file:") && url[5]) | |
5075 | return true; | |
5076 | ||
5077 | if (startswith(url, "info:") && url[5]) | |
5078 | return true; | |
5079 | ||
5080 | if (startswith(url, "man:") && url[4]) | |
5081 | return true; | |
5082 | ||
5083 | return false; | |
5084 | } | |
9be346c9 HH |
5085 | |
5086 | bool in_initrd(void) { | |
73020ab2 | 5087 | static int saved = -1; |
825c6fe5 | 5088 | struct statfs s; |
8f33b5b8 | 5089 | |
825c6fe5 LP |
5090 | if (saved >= 0) |
5091 | return saved; | |
5092 | ||
5093 | /* We make two checks here: | |
5094 | * | |
5095 | * 1. the flag file /etc/initrd-release must exist | |
5096 | * 2. the root file system must be a memory file system | |
5097 | * | |
5098 | * The second check is extra paranoia, since misdetecting an | |
5099 | * initrd can have bad bad consequences due the initrd | |
5100 | * emptying when transititioning to the main systemd. | |
5101 | */ | |
5102 | ||
5103 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5104 | statfs("/", &s) >= 0 && | |
943aad8c | 5105 | is_temporary_fs(&s); |
9be346c9 | 5106 | |
8f33b5b8 | 5107 | return saved; |
9be346c9 | 5108 | } |
069cfc85 LP |
5109 | |
5110 | void warn_melody(void) { | |
e67f47e5 | 5111 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5112 | |
5113 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5114 | if (fd < 0) | |
5115 | return; | |
5116 | ||
040f18ea | 5117 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5118 | |
5119 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5120 | usleep(125*USEC_PER_MSEC); | |
5121 | ||
5122 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5123 | usleep(125*USEC_PER_MSEC); | |
5124 | ||
5125 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5126 | usleep(125*USEC_PER_MSEC); | |
5127 | ||
5128 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5129 | } |
cd3bd60a LP |
5130 | |
5131 | int make_console_stdio(void) { | |
5132 | int fd, r; | |
5133 | ||
5134 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5135 | ||
5136 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5137 | if (fd < 0) { | |
5138 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5139 | return fd; | |
5140 | } | |
5141 | ||
5142 | r = make_stdio(fd); | |
5143 | if (r < 0) { | |
5144 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5145 | return r; | |
5146 | } | |
5147 | ||
5148 | return 0; | |
5149 | } | |
7c5f152a LP |
5150 | |
5151 | int get_home_dir(char **_h) { | |
2cfbd749 | 5152 | struct passwd *p; |
7c5f152a | 5153 | const char *e; |
2cfbd749 | 5154 | char *h; |
7c5f152a | 5155 | uid_t u; |
7c5f152a LP |
5156 | |
5157 | assert(_h); | |
5158 | ||
5159 | /* Take the user specified one */ | |
5160 | e = getenv("HOME"); | |
5161 | if (e) { | |
5162 | h = strdup(e); | |
5163 | if (!h) | |
5164 | return -ENOMEM; | |
5165 | ||
5166 | *_h = h; | |
5167 | return 0; | |
5168 | } | |
5169 | ||
5170 | /* Hardcode home directory for root to avoid NSS */ | |
5171 | u = getuid(); | |
5172 | if (u == 0) { | |
5173 | h = strdup("/root"); | |
5174 | if (!h) | |
5175 | return -ENOMEM; | |
5176 | ||
5177 | *_h = h; | |
5178 | return 0; | |
5179 | } | |
5180 | ||
5181 | /* Check the database... */ | |
5182 | errno = 0; | |
5183 | p = getpwuid(u); | |
5184 | if (!p) | |
bcb161b0 | 5185 | return errno > 0 ? -errno : -ESRCH; |
7c5f152a LP |
5186 | |
5187 | if (!path_is_absolute(p->pw_dir)) | |
5188 | return -EINVAL; | |
5189 | ||
5190 | h = strdup(p->pw_dir); | |
5191 | if (!h) | |
5192 | return -ENOMEM; | |
5193 | ||
5194 | *_h = h; | |
5195 | return 0; | |
5196 | } | |
5197 | ||
2cfbd749 LP |
5198 | int get_shell(char **_s) { |
5199 | struct passwd *p; | |
5200 | const char *e; | |
5201 | char *s; | |
5202 | uid_t u; | |
5203 | ||
5204 | assert(_s); | |
5205 | ||
5206 | /* Take the user specified one */ | |
5207 | e = getenv("SHELL"); | |
5208 | if (e) { | |
5209 | s = strdup(e); | |
5210 | if (!s) | |
5211 | return -ENOMEM; | |
5212 | ||
5213 | *_s = s; | |
5214 | return 0; | |
5215 | } | |
5216 | ||
5217 | /* Hardcode home directory for root to avoid NSS */ | |
5218 | u = getuid(); | |
5219 | if (u == 0) { | |
5220 | s = strdup("/bin/sh"); | |
5221 | if (!s) | |
5222 | return -ENOMEM; | |
5223 | ||
5224 | *_s = s; | |
5225 | return 0; | |
5226 | } | |
5227 | ||
5228 | /* Check the database... */ | |
5229 | errno = 0; | |
5230 | p = getpwuid(u); | |
5231 | if (!p) | |
5232 | return errno > 0 ? -errno : -ESRCH; | |
5233 | ||
5234 | if (!path_is_absolute(p->pw_shell)) | |
5235 | return -EINVAL; | |
5236 | ||
5237 | s = strdup(p->pw_shell); | |
5238 | if (!s) | |
5239 | return -ENOMEM; | |
5240 | ||
5241 | *_s = s; | |
5242 | return 0; | |
5243 | } | |
5244 | ||
0b507b17 LP |
5245 | bool filename_is_safe(const char *p) { |
5246 | ||
5247 | if (isempty(p)) | |
5248 | return false; | |
5249 | ||
5250 | if (strchr(p, '/')) | |
5251 | return false; | |
5252 | ||
5253 | if (streq(p, ".")) | |
5254 | return false; | |
5255 | ||
5256 | if (streq(p, "..")) | |
5257 | return false; | |
5258 | ||
5259 | if (strlen(p) > FILENAME_MAX) | |
5260 | return false; | |
5261 | ||
5262 | return true; | |
5263 | } | |
5264 | ||
5265 | bool string_is_safe(const char *p) { | |
5266 | const char *t; | |
5267 | ||
5268 | assert(p); | |
5269 | ||
5270 | for (t = p; *t; t++) { | |
01539d6e | 5271 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5272 | return false; |
5273 | ||
011afa76 | 5274 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5275 | return false; |
5276 | } | |
5277 | ||
5278 | return true; | |
5279 | } | |
cfbc22ab | 5280 | |
ac4c8d6d ZJS |
5281 | /** |
5282 | * Check if a string contains control characters. | |
5283 | * Spaces and tabs are not considered control characters. | |
5284 | */ | |
4d1a6904 LP |
5285 | bool string_has_cc(const char *p) { |
5286 | const char *t; | |
5287 | ||
5288 | assert(p); | |
5289 | ||
5290 | for (t = p; *t; t++) | |
da2620a5 | 5291 | if (*t > 0 && *t < ' ' && *t != '\t') |
4d1a6904 LP |
5292 | return true; |
5293 | ||
5294 | return false; | |
5295 | } | |
5296 | ||
e884315e LP |
5297 | bool path_is_safe(const char *p) { |
5298 | ||
5299 | if (isempty(p)) | |
5300 | return false; | |
5301 | ||
5302 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5303 | return false; | |
5304 | ||
5305 | if (strlen(p) > PATH_MAX) | |
5306 | return false; | |
5307 | ||
5308 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5309 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5310 | return false; | |
5311 | ||
5312 | if (strstr(p, "//")) | |
5313 | return false; | |
5314 | ||
5315 | return true; | |
5316 | } | |
5317 | ||
a9e12476 KS |
5318 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5319 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5320 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5321 | size_t l, u, idx; |
5322 | const void *p; | |
5323 | int comparison; | |
5324 | ||
5325 | l = 0; | |
5326 | u = nmemb; | |
5327 | while (l < u) { | |
5328 | idx = (l + u) / 2; | |
5329 | p = (void *)(((const char *) base) + (idx * size)); | |
5330 | comparison = compar(key, p, arg); | |
5331 | if (comparison < 0) | |
5332 | u = idx; | |
5333 | else if (comparison > 0) | |
5334 | l = idx + 1; | |
5335 | else | |
5336 | return (void *)p; | |
5337 | } | |
5338 | return NULL; | |
5339 | } | |
09017585 MS |
5340 | |
5341 | bool is_locale_utf8(void) { | |
5342 | const char *set; | |
5343 | static int cached_answer = -1; | |
5344 | ||
5345 | if (cached_answer >= 0) | |
5346 | goto out; | |
5347 | ||
5348 | if (!setlocale(LC_ALL, "")) { | |
5349 | cached_answer = true; | |
5350 | goto out; | |
5351 | } | |
5352 | ||
5353 | set = nl_langinfo(CODESET); | |
5354 | if (!set) { | |
5355 | cached_answer = true; | |
5356 | goto out; | |
5357 | } | |
5358 | ||
f168c273 | 5359 | if (streq(set, "UTF-8")) { |
fee79e01 HH |
5360 | cached_answer = true; |
5361 | goto out; | |
5362 | } | |
5363 | ||
6cf2f1d9 HH |
5364 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
5365 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
5366 | set = setlocale(LC_CTYPE, NULL); |
5367 | if (!set) { | |
5368 | cached_answer = true; | |
5369 | goto out; | |
5370 | } | |
5371 | ||
6cf2f1d9 HH |
5372 | /* Check result, but ignore the result if C was set |
5373 | * explicitly. */ | |
5374 | cached_answer = | |
5375 | streq(set, "C") && | |
5376 | !getenv("LC_ALL") && | |
5377 | !getenv("LC_CTYPE") && | |
5378 | !getenv("LANG"); | |
fee79e01 | 5379 | |
09017585 | 5380 | out: |
6cf2f1d9 | 5381 | return (bool) cached_answer; |
09017585 | 5382 | } |
c339d977 MS |
5383 | |
5384 | const char *draw_special_char(DrawSpecialChar ch) { | |
5385 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
5386 | /* UTF-8 */ { | |
45a5ff0d MS |
5387 | [DRAW_TREE_VERT] = "\342\224\202 ", /* │ */ |
5388 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ | |
5389 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5390 | [DRAW_TREE_SPACE] = " ", /* */ |
45a5ff0d | 5391 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243 ", /* ‣ */ |
3deadb91 | 5392 | [DRAW_BLACK_CIRCLE] = "\342\227\217 ", /* ● */ |
c339d977 MS |
5393 | }, |
5394 | /* ASCII fallback */ { | |
45a5ff0d MS |
5395 | [DRAW_TREE_VERT] = "| ", |
5396 | [DRAW_TREE_BRANCH] = "|-", | |
5397 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5398 | [DRAW_TREE_SPACE] = " ", |
45a5ff0d | 5399 | [DRAW_TRIANGULAR_BULLET] = "> ", |
3deadb91 | 5400 | [DRAW_BLACK_CIRCLE] = "* ", |
c339d977 MS |
5401 | } |
5402 | }; | |
5403 | ||
5404 | return draw_table[!is_locale_utf8()][ch]; | |
5405 | } | |
409bc9c3 LP |
5406 | |
5407 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5408 | const char *f; | |
5409 | char *t, *r; | |
5410 | size_t l, old_len, new_len; | |
5411 | ||
5412 | assert(text); | |
5413 | assert(old_string); | |
5414 | assert(new_string); | |
5415 | ||
5416 | old_len = strlen(old_string); | |
5417 | new_len = strlen(new_string); | |
5418 | ||
5419 | l = strlen(text); | |
5420 | r = new(char, l+1); | |
5421 | if (!r) | |
5422 | return NULL; | |
5423 | ||
5424 | f = text; | |
5425 | t = r; | |
5426 | while (*f) { | |
5427 | char *a; | |
5428 | size_t d, nl; | |
5429 | ||
5430 | if (!startswith(f, old_string)) { | |
5431 | *(t++) = *(f++); | |
5432 | continue; | |
5433 | } | |
5434 | ||
5435 | d = t - r; | |
5436 | nl = l - old_len + new_len; | |
5437 | a = realloc(r, nl + 1); | |
5438 | if (!a) | |
5439 | goto oom; | |
5440 | ||
5441 | l = nl; | |
5442 | r = a; | |
5443 | t = r + d; | |
5444 | ||
5445 | t = stpcpy(t, new_string); | |
5446 | f += old_len; | |
5447 | } | |
5448 | ||
5449 | *t = 0; | |
5450 | return r; | |
5451 | ||
5452 | oom: | |
5453 | free(r); | |
5454 | return NULL; | |
5455 | } | |
e8bc0ea2 LP |
5456 | |
5457 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5458 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5459 | enum { |
5460 | STATE_OTHER, | |
5461 | STATE_ESCAPE, | |
5462 | STATE_BRACKET | |
5463 | } state = STATE_OTHER; | |
5464 | char *obuf = NULL; | |
5465 | size_t osz = 0, isz; | |
5466 | FILE *f; | |
5467 | ||
5468 | assert(ibuf); | |
5469 | assert(*ibuf); | |
5470 | ||
5471 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5472 | ||
5473 | isz = _isz ? *_isz : strlen(*ibuf); | |
5474 | ||
5475 | f = open_memstream(&obuf, &osz); | |
5476 | if (!f) | |
5477 | return NULL; | |
5478 | ||
5479 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5480 | ||
5481 | switch (state) { | |
5482 | ||
5483 | case STATE_OTHER: | |
5484 | if (i >= *ibuf + isz) /* EOT */ | |
5485 | break; | |
5486 | else if (*i == '\x1B') | |
5487 | state = STATE_ESCAPE; | |
5488 | else if (*i == '\t') | |
5489 | fputs(" ", f); | |
5490 | else | |
5491 | fputc(*i, f); | |
5492 | break; | |
5493 | ||
5494 | case STATE_ESCAPE: | |
5495 | if (i >= *ibuf + isz) { /* EOT */ | |
5496 | fputc('\x1B', f); | |
5497 | break; | |
5498 | } else if (*i == '[') { | |
5499 | state = STATE_BRACKET; | |
5500 | begin = i + 1; | |
5501 | } else { | |
5502 | fputc('\x1B', f); | |
5503 | fputc(*i, f); | |
5504 | state = STATE_OTHER; | |
5505 | } | |
5506 | ||
5507 | break; | |
5508 | ||
5509 | case STATE_BRACKET: | |
5510 | ||
5511 | if (i >= *ibuf + isz || /* EOT */ | |
5512 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5513 | fputc('\x1B', f); | |
5514 | fputc('[', f); | |
5515 | state = STATE_OTHER; | |
5516 | i = begin-1; | |
5517 | } else if (*i == 'm') | |
5518 | state = STATE_OTHER; | |
5519 | break; | |
5520 | } | |
5521 | } | |
5522 | ||
5523 | if (ferror(f)) { | |
5524 | fclose(f); | |
5525 | free(obuf); | |
5526 | return NULL; | |
5527 | } | |
5528 | ||
5529 | fclose(f); | |
5530 | ||
5531 | free(*ibuf); | |
5532 | *ibuf = obuf; | |
5533 | ||
5534 | if (_isz) | |
5535 | *_isz = osz; | |
5536 | ||
5537 | return obuf; | |
5538 | } | |
240dbaa4 LP |
5539 | |
5540 | int on_ac_power(void) { | |
5541 | bool found_offline = false, found_online = false; | |
5542 | _cleanup_closedir_ DIR *d = NULL; | |
5543 | ||
5544 | d = opendir("/sys/class/power_supply"); | |
5545 | if (!d) | |
5546 | return -errno; | |
5547 | ||
5548 | for (;;) { | |
5549 | struct dirent *de; | |
240dbaa4 LP |
5550 | _cleanup_close_ int fd = -1, device = -1; |
5551 | char contents[6]; | |
5552 | ssize_t n; | |
240dbaa4 | 5553 | |
3fd11280 FW |
5554 | errno = 0; |
5555 | de = readdir(d); | |
5556 | if (!de && errno != 0) | |
5557 | return -errno; | |
240dbaa4 LP |
5558 | |
5559 | if (!de) | |
5560 | break; | |
5561 | ||
5562 | if (ignore_file(de->d_name)) | |
5563 | continue; | |
5564 | ||
5565 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5566 | if (device < 0) { | |
5567 | if (errno == ENOENT || errno == ENOTDIR) | |
5568 | continue; | |
5569 | ||
5570 | return -errno; | |
5571 | } | |
5572 | ||
5573 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5574 | if (fd < 0) { | |
5575 | if (errno == ENOENT) | |
5576 | continue; | |
5577 | ||
5578 | return -errno; | |
5579 | } | |
5580 | ||
5581 | n = read(fd, contents, sizeof(contents)); | |
5582 | if (n < 0) | |
5583 | return -errno; | |
5584 | ||
5585 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5586 | continue; | |
5587 | ||
5588 | close_nointr_nofail(fd); | |
5589 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5590 | if (fd < 0) { | |
5591 | if (errno == ENOENT) | |
5592 | continue; | |
5593 | ||
5594 | return -errno; | |
5595 | } | |
5596 | ||
5597 | n = read(fd, contents, sizeof(contents)); | |
5598 | if (n < 0) | |
5599 | return -errno; | |
5600 | ||
5601 | if (n != 2 || contents[1] != '\n') | |
5602 | return -EIO; | |
5603 | ||
5604 | if (contents[0] == '1') { | |
5605 | found_online = true; | |
5606 | break; | |
5607 | } else if (contents[0] == '0') | |
5608 | found_offline = true; | |
5609 | else | |
5610 | return -EIO; | |
5611 | } | |
5612 | ||
5613 | return found_online || !found_offline; | |
5614 | } | |
fabe5c0e LP |
5615 | |
5616 | static int search_and_fopen_internal(const char *path, const char *mode, char **search, FILE **_f) { | |
5617 | char **i; | |
5618 | ||
5619 | assert(path); | |
5620 | assert(mode); | |
5621 | assert(_f); | |
5622 | ||
112cfb18 | 5623 | if (!path_strv_canonicalize_absolute_uniq(search, NULL)) |
fabe5c0e LP |
5624 | return -ENOMEM; |
5625 | ||
5626 | STRV_FOREACH(i, search) { | |
5627 | _cleanup_free_ char *p = NULL; | |
5628 | FILE *f; | |
5629 | ||
5630 | p = strjoin(*i, "/", path, NULL); | |
5631 | if (!p) | |
5632 | return -ENOMEM; | |
5633 | ||
5634 | f = fopen(p, mode); | |
5635 | if (f) { | |
5636 | *_f = f; | |
5637 | return 0; | |
5638 | } | |
5639 | ||
5640 | if (errno != ENOENT) | |
5641 | return -errno; | |
5642 | } | |
5643 | ||
5644 | return -ENOENT; | |
5645 | } | |
5646 | ||
5647 | int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f) { | |
5648 | _cleanup_strv_free_ char **copy = NULL; | |
5649 | ||
5650 | assert(path); | |
5651 | assert(mode); | |
5652 | assert(_f); | |
5653 | ||
5654 | if (path_is_absolute(path)) { | |
5655 | FILE *f; | |
5656 | ||
5657 | f = fopen(path, mode); | |
5658 | if (f) { | |
5659 | *_f = f; | |
5660 | return 0; | |
5661 | } | |
5662 | ||
5663 | return -errno; | |
5664 | } | |
5665 | ||
5666 | copy = strv_copy((char**) search); | |
5667 | if (!copy) | |
5668 | return -ENOMEM; | |
5669 | ||
5670 | return search_and_fopen_internal(path, mode, copy, _f); | |
5671 | } | |
5672 | ||
5673 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f) { | |
5674 | _cleanup_strv_free_ char **s = NULL; | |
5675 | ||
5676 | if (path_is_absolute(path)) { | |
5677 | FILE *f; | |
5678 | ||
5679 | f = fopen(path, mode); | |
5680 | if (f) { | |
5681 | *_f = f; | |
5682 | return 0; | |
5683 | } | |
5684 | ||
5685 | return -errno; | |
5686 | } | |
5687 | ||
5688 | s = strv_split_nulstr(search); | |
5689 | if (!s) | |
5690 | return -ENOMEM; | |
5691 | ||
5692 | return search_and_fopen_internal(path, mode, s, _f); | |
5693 | } | |
c17ec25e | 5694 | |
66e35261 LP |
5695 | char *strextend(char **x, ...) { |
5696 | va_list ap; | |
5697 | size_t f, l; | |
5698 | char *r, *p; | |
5699 | ||
5700 | assert(x); | |
5701 | ||
5702 | l = f = *x ? strlen(*x) : 0; | |
5703 | ||
5704 | va_start(ap, x); | |
5705 | for (;;) { | |
5706 | const char *t; | |
5707 | size_t n; | |
5708 | ||
5709 | t = va_arg(ap, const char *); | |
5710 | if (!t) | |
5711 | break; | |
5712 | ||
5713 | n = strlen(t); | |
5714 | if (n > ((size_t) -1) - l) { | |
5715 | va_end(ap); | |
5716 | return NULL; | |
5717 | } | |
5718 | ||
5719 | l += n; | |
5720 | } | |
5721 | va_end(ap); | |
5722 | ||
5723 | r = realloc(*x, l+1); | |
5724 | if (!r) | |
5725 | return NULL; | |
5726 | ||
5727 | p = r + f; | |
5728 | ||
5729 | va_start(ap, x); | |
5730 | for (;;) { | |
5731 | const char *t; | |
5732 | ||
5733 | t = va_arg(ap, const char *); | |
5734 | if (!t) | |
5735 | break; | |
5736 | ||
5737 | p = stpcpy(p, t); | |
5738 | } | |
5739 | va_end(ap); | |
5740 | ||
5741 | *p = 0; | |
5742 | *x = r; | |
5743 | ||
5744 | return r + l; | |
5745 | } | |
9a17484d LP |
5746 | |
5747 | char *strrep(const char *s, unsigned n) { | |
5748 | size_t l; | |
5749 | char *r, *p; | |
5750 | unsigned i; | |
5751 | ||
5752 | assert(s); | |
5753 | ||
5754 | l = strlen(s); | |
5755 | p = r = malloc(l * n + 1); | |
5756 | if (!r) | |
5757 | return NULL; | |
5758 | ||
5759 | for (i = 0; i < n; i++) | |
5760 | p = stpcpy(p, s); | |
5761 | ||
5762 | *p = 0; | |
5763 | return r; | |
5764 | } | |
392d5b37 LP |
5765 | |
5766 | void* greedy_realloc(void **p, size_t *allocated, size_t need) { | |
5767 | size_t a; | |
5768 | void *q; | |
5769 | ||
98088803 | 5770 | assert(p); |
e93c33d4 SL |
5771 | assert(allocated); |
5772 | ||
392d5b37 LP |
5773 | if (*allocated >= need) |
5774 | return *p; | |
5775 | ||
9607d947 | 5776 | a = MAX(64u, need * 2); |
98088803 LP |
5777 | |
5778 | /* check for overflows */ | |
5779 | if (a < need) | |
5780 | return NULL; | |
5781 | ||
392d5b37 LP |
5782 | q = realloc(*p, a); |
5783 | if (!q) | |
5784 | return NULL; | |
5785 | ||
5786 | *p = q; | |
5787 | *allocated = a; | |
5788 | return q; | |
5789 | } | |
aa96c6cb | 5790 | |
4545a231 | 5791 | void* greedy_realloc0(void **p, size_t *allocated, size_t need) { |
98088803 | 5792 | size_t prev; |
4545a231 DH |
5793 | uint8_t *q; |
5794 | ||
98088803 LP |
5795 | assert(p); |
5796 | assert(allocated); | |
5797 | ||
5798 | prev = *allocated; | |
5799 | ||
4545a231 DH |
5800 | q = greedy_realloc(p, allocated, need); |
5801 | if (!q) | |
5802 | return NULL; | |
5803 | ||
5804 | if (*allocated > prev) | |
29804cc1 | 5805 | memzero(&q[prev], *allocated - prev); |
4545a231 DH |
5806 | |
5807 | return q; | |
5808 | } | |
5809 | ||
aa96c6cb LP |
5810 | bool id128_is_valid(const char *s) { |
5811 | size_t i, l; | |
5812 | ||
5813 | l = strlen(s); | |
5814 | if (l == 32) { | |
5815 | ||
5816 | /* Simple formatted 128bit hex string */ | |
5817 | ||
5818 | for (i = 0; i < l; i++) { | |
5819 | char c = s[i]; | |
5820 | ||
5821 | if (!(c >= '0' && c <= '9') && | |
5822 | !(c >= 'a' && c <= 'z') && | |
5823 | !(c >= 'A' && c <= 'Z')) | |
5824 | return false; | |
5825 | } | |
5826 | ||
5827 | } else if (l == 36) { | |
5828 | ||
5829 | /* Formatted UUID */ | |
5830 | ||
5831 | for (i = 0; i < l; i++) { | |
5832 | char c = s[i]; | |
5833 | ||
5834 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
5835 | if (c != '-') | |
5836 | return false; | |
5837 | } else { | |
5838 | if (!(c >= '0' && c <= '9') && | |
5839 | !(c >= 'a' && c <= 'z') && | |
5840 | !(c >= 'A' && c <= 'Z')) | |
5841 | return false; | |
5842 | } | |
5843 | } | |
5844 | ||
5845 | } else | |
5846 | return false; | |
5847 | ||
5848 | return true; | |
5849 | } | |
7085053a | 5850 | |
d4ac85c6 LP |
5851 | int split_pair(const char *s, const char *sep, char **l, char **r) { |
5852 | char *x, *a, *b; | |
5853 | ||
5854 | assert(s); | |
5855 | assert(sep); | |
5856 | assert(l); | |
5857 | assert(r); | |
5858 | ||
5859 | if (isempty(sep)) | |
5860 | return -EINVAL; | |
5861 | ||
5862 | x = strstr(s, sep); | |
5863 | if (!x) | |
5864 | return -EINVAL; | |
5865 | ||
5866 | a = strndup(s, x - s); | |
5867 | if (!a) | |
5868 | return -ENOMEM; | |
5869 | ||
5870 | b = strdup(x + strlen(sep)); | |
5871 | if (!b) { | |
5872 | free(a); | |
5873 | return -ENOMEM; | |
5874 | } | |
5875 | ||
5876 | *l = a; | |
5877 | *r = b; | |
5878 | ||
5879 | return 0; | |
5880 | } | |
295edddf | 5881 | |
74df0fca | 5882 | int shall_restore_state(void) { |
295edddf TG |
5883 | _cleanup_free_ char *line; |
5884 | char *w, *state; | |
295edddf | 5885 | size_t l; |
74df0fca | 5886 | int r; |
295edddf | 5887 | |
74df0fca LP |
5888 | r = proc_cmdline(&line); |
5889 | if (r < 0) | |
5890 | return r; | |
5891 | if (r == 0) /* Container ... */ | |
5892 | return 1; | |
295edddf | 5893 | |
74df0fca | 5894 | FOREACH_WORD_QUOTED(w, l, line, state) |
85ca9433 | 5895 | if (l == 23 && strneq(w, "systemd.restore_state=0", 23)) |
74df0fca LP |
5896 | return 0; |
5897 | ||
5898 | return 1; | |
5899 | } | |
5900 | ||
5901 | int proc_cmdline(char **ret) { | |
5902 | int r; | |
5903 | ||
5904 | if (detect_container(NULL) > 0) { | |
02bb6cda LP |
5905 | char *buf, *p; |
5906 | size_t sz = 0; | |
5907 | ||
5908 | r = read_full_file("/proc/1/cmdline", &buf, &sz); | |
5909 | if (r < 0) | |
5910 | return r; | |
5911 | ||
5912 | for (p = buf; p + 1 < buf + sz; p++) | |
5913 | if (*p == 0) | |
5914 | *p = ' '; | |
5915 | ||
5916 | *p = 0; | |
5917 | *ret = buf; | |
5918 | return 1; | |
295edddf TG |
5919 | } |
5920 | ||
74df0fca LP |
5921 | r = read_one_line_file("/proc/cmdline", ret); |
5922 | if (r < 0) | |
5923 | return r; | |
295edddf | 5924 | |
74df0fca | 5925 | return 1; |
295edddf | 5926 | } |
bc9fd78c | 5927 | |
141a79f4 ZJS |
5928 | int parse_proc_cmdline(int (*parse_word)(const char *word)) { |
5929 | _cleanup_free_ char *line = NULL; | |
5930 | char *w, *state; | |
5931 | size_t l; | |
5932 | int r; | |
5933 | ||
5934 | r = proc_cmdline(&line); | |
5935 | if (r < 0) | |
5936 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); | |
5937 | if (r <= 0) | |
5938 | return 0; | |
5939 | ||
5940 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
5941 | _cleanup_free_ char *word; | |
5942 | ||
5943 | word = strndup(w, l); | |
5944 | if (!word) | |
5945 | return log_oom(); | |
5946 | ||
5947 | r = parse_word(word); | |
5948 | if (r < 0) { | |
5949 | log_error("Failed on cmdline argument %s: %s", word, strerror(-r)); | |
5950 | return r; | |
5951 | } | |
5952 | } | |
5953 | ||
5954 | return 0; | |
5955 | } | |
5956 | ||
bc9fd78c LP |
5957 | int container_get_leader(const char *machine, pid_t *pid) { |
5958 | _cleanup_free_ char *s = NULL, *class = NULL; | |
5959 | const char *p; | |
5960 | pid_t leader; | |
5961 | int r; | |
5962 | ||
5963 | assert(machine); | |
5964 | assert(pid); | |
5965 | ||
5966 | p = strappenda("/run/systemd/machines/", machine); | |
5967 | r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); | |
5968 | if (r == -ENOENT) | |
5969 | return -EHOSTDOWN; | |
5970 | if (r < 0) | |
5971 | return r; | |
5972 | if (!s) | |
5973 | return -EIO; | |
5974 | ||
5975 | if (!streq_ptr(class, "container")) | |
5976 | return -EIO; | |
5977 | ||
5978 | r = parse_pid(s, &leader); | |
5979 | if (r < 0) | |
5980 | return r; | |
5981 | if (leader <= 1) | |
5982 | return -EIO; | |
5983 | ||
5984 | *pid = leader; | |
5985 | return 0; | |
5986 | } | |
5987 | ||
a4475f57 LP |
5988 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd) { |
5989 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1; | |
5990 | const char *pidns, *mntns, *root; | |
bc9fd78c LP |
5991 | int rfd; |
5992 | ||
5993 | assert(pid >= 0); | |
a4475f57 LP |
5994 | assert(pidns_fd); |
5995 | assert(mntns_fd); | |
bc9fd78c LP |
5996 | assert(root_fd); |
5997 | ||
a4475f57 LP |
5998 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
5999 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6000 | if (mntnsfd < 0) | |
6001 | return -errno; | |
6002 | ||
6003 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
6004 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6005 | if (pidnsfd < 0) | |
bc9fd78c LP |
6006 | return -errno; |
6007 | ||
6008 | root = procfs_file_alloca(pid, "root"); | |
6009 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
6010 | if (rfd < 0) | |
6011 | return -errno; | |
6012 | ||
a4475f57 LP |
6013 | *pidns_fd = pidnsfd; |
6014 | *mntns_fd = mntnsfd; | |
bc9fd78c | 6015 | *root_fd = rfd; |
a4475f57 LP |
6016 | pidnsfd = -1; |
6017 | mntnsfd = -1; | |
bc9fd78c LP |
6018 | |
6019 | return 0; | |
6020 | } | |
6021 | ||
a4475f57 LP |
6022 | int namespace_enter(int pidns_fd, int mntns_fd, int root_fd) { |
6023 | assert(pidns_fd >= 0); | |
6024 | assert(mntns_fd >= 0); | |
bc9fd78c LP |
6025 | assert(root_fd >= 0); |
6026 | ||
a4475f57 LP |
6027 | if (setns(pidns_fd, CLONE_NEWPID) < 0) |
6028 | return -errno; | |
6029 | ||
6030 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
bc9fd78c LP |
6031 | return -errno; |
6032 | ||
6033 | if (fchdir(root_fd) < 0) | |
6034 | return -errno; | |
6035 | ||
6036 | if (chroot(".") < 0) | |
6037 | return -errno; | |
6038 | ||
5e2b3214 LP |
6039 | if (setresgid(0, 0, 0) < 0) |
6040 | return -errno; | |
6041 | ||
6042 | if (setresuid(0, 0, 0) < 0) | |
6043 | return -errno; | |
6044 | ||
bc9fd78c LP |
6045 | return 0; |
6046 | } | |
bf108e55 | 6047 | |
9f5650ae LP |
6048 | bool pid_is_unwaited(pid_t pid) { |
6049 | /* Checks whether a PID is still valid at all, including a zombie */ | |
6050 | ||
bf108e55 LP |
6051 | if (pid <= 0) |
6052 | return false; | |
6053 | ||
6054 | if (kill(pid, 0) >= 0) | |
6055 | return true; | |
6056 | ||
6057 | return errno != ESRCH; | |
6058 | } | |
eff05270 | 6059 | |
9f5650ae LP |
6060 | bool pid_is_alive(pid_t pid) { |
6061 | int r; | |
6062 | ||
6063 | /* Checks whether a PID is still valid and not a zombie */ | |
6064 | ||
6065 | if (pid <= 0) | |
6066 | return false; | |
6067 | ||
6068 | r = get_process_state(pid); | |
6069 | if (r == -ENOENT || r == 'Z') | |
6070 | return false; | |
6071 | ||
6072 | return true; | |
6073 | } | |
6074 | ||
eff05270 LP |
6075 | int getpeercred(int fd, struct ucred *ucred) { |
6076 | socklen_t n = sizeof(struct ucred); | |
6077 | struct ucred u; | |
6078 | int r; | |
6079 | ||
6080 | assert(fd >= 0); | |
6081 | assert(ucred); | |
6082 | ||
6083 | r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &u, &n); | |
6084 | if (r < 0) | |
6085 | return -errno; | |
6086 | ||
6087 | if (n != sizeof(struct ucred)) | |
6088 | return -EIO; | |
6089 | ||
6090 | /* Check if the data is actually useful and not suppressed due | |
6091 | * to namespacing issues */ | |
6092 | if (u.pid <= 0) | |
6093 | return -ENODATA; | |
6094 | ||
6095 | *ucred = u; | |
6096 | return 0; | |
6097 | } | |
6098 | ||
6099 | int getpeersec(int fd, char **ret) { | |
6100 | socklen_t n = 64; | |
6101 | char *s; | |
6102 | int r; | |
6103 | ||
6104 | assert(fd >= 0); | |
6105 | assert(ret); | |
6106 | ||
6107 | s = new0(char, n); | |
6108 | if (!s) | |
6109 | return -ENOMEM; | |
6110 | ||
6111 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6112 | if (r < 0) { | |
6113 | free(s); | |
6114 | ||
6115 | if (errno != ERANGE) | |
6116 | return -errno; | |
6117 | ||
6118 | s = new0(char, n); | |
6119 | if (!s) | |
6120 | return -ENOMEM; | |
6121 | ||
6122 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6123 | if (r < 0) { | |
6124 | free(s); | |
6125 | return -errno; | |
6126 | } | |
6127 | } | |
6128 | ||
ae98841e LP |
6129 | if (isempty(s)) { |
6130 | free(s); | |
6131 | return -ENOTSUP; | |
6132 | } | |
6133 | ||
eff05270 LP |
6134 | *ret = s; |
6135 | return 0; | |
6136 | } | |
8e33886e | 6137 | |
0f010ef2 | 6138 | /* This is much like like mkostemp() but is subject to umask(). */ |
65b3903f | 6139 | int mkostemp_safe(char *pattern, int flags) { |
2d5bdf5b | 6140 | _cleanup_umask_ mode_t u; |
0f010ef2 | 6141 | int fd; |
65b3903f | 6142 | |
d37a91e8 | 6143 | assert(pattern); |
65b3903f | 6144 | |
2d5bdf5b LP |
6145 | u = umask(077); |
6146 | ||
0f010ef2 ZJS |
6147 | fd = mkostemp(pattern, flags); |
6148 | if (fd < 0) | |
6149 | return -errno; | |
65b3903f | 6150 | |
0f010ef2 | 6151 | return fd; |
65b3903f ZJS |
6152 | } |
6153 | ||
8e33886e | 6154 | int open_tmpfile(const char *path, int flags) { |
8e33886e | 6155 | char *p; |
a6afc4ae LP |
6156 | int fd; |
6157 | ||
6158 | assert(path); | |
8e33886e ZJS |
6159 | |
6160 | #ifdef O_TMPFILE | |
7736202c LP |
6161 | /* Try O_TMPFILE first, if it is supported */ |
6162 | fd = open(path, flags|O_TMPFILE, S_IRUSR|S_IWUSR); | |
8e33886e ZJS |
6163 | if (fd >= 0) |
6164 | return fd; | |
6165 | #endif | |
7736202c LP |
6166 | |
6167 | /* Fall back to unguessable name + unlinking */ | |
8e33886e ZJS |
6168 | p = strappenda(path, "/systemd-tmp-XXXXXX"); |
6169 | ||
a6afc4ae | 6170 | fd = mkostemp_safe(p, flags); |
8e33886e | 6171 | if (fd < 0) |
65b3903f | 6172 | return fd; |
8e33886e ZJS |
6173 | |
6174 | unlink(p); | |
6175 | return fd; | |
6176 | } | |
fdb9161c LP |
6177 | |
6178 | int fd_warn_permissions(const char *path, int fd) { | |
6179 | struct stat st; | |
6180 | ||
6181 | if (fstat(fd, &st) < 0) | |
6182 | return -errno; | |
6183 | ||
6184 | if (st.st_mode & 0111) | |
6185 | log_warning("Configuration file %s is marked executable. Please remove executable permission bits. Proceeding anyway.", path); | |
6186 | ||
6187 | if (st.st_mode & 0002) | |
6188 | log_warning("Configuration file %s is marked world-writable. Please remove world writability permission bits. Proceeding anyway.", path); | |
6189 | ||
6190 | if (getpid() == 1 && (st.st_mode & 0044) != 0044) | |
6191 | 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); | |
6192 | ||
6193 | return 0; | |
6194 | } |