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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 | ||
a41e8209 | 362 | /* Split a string into words. */ |
65d2ebdc | 363 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
364 | char *current; |
365 | ||
366 | current = *state ? *state : (char*) c; | |
367 | ||
368 | if (!*current || *c == 0) | |
369 | return NULL; | |
370 | ||
65d2ebdc LP |
371 | current += strspn(current, separator); |
372 | *l = strcspn(current, separator); | |
82919e3d LP |
373 | *state = current+*l; |
374 | ||
375 | return (char*) current; | |
376 | } | |
377 | ||
034c6ed7 LP |
378 | /* Split a string into words, but consider strings enclosed in '' and |
379 | * "" as words even if they include spaces. */ | |
380 | char *split_quoted(const char *c, size_t *l, char **state) { | |
70f75a52 | 381 | const char *current, *e; |
0bab36f2 | 382 | bool escaped = false; |
034c6ed7 | 383 | |
70f75a52 LP |
384 | assert(c); |
385 | assert(l); | |
386 | assert(state); | |
034c6ed7 | 387 | |
70f75a52 | 388 | current = *state ? *state : c; |
034c6ed7 LP |
389 | |
390 | current += strspn(current, WHITESPACE); | |
391 | ||
70f75a52 LP |
392 | if (*current == 0) |
393 | return NULL; | |
394 | ||
395 | else if (*current == '\'') { | |
034c6ed7 | 396 | current ++; |
034c6ed7 | 397 | |
0bab36f2 LP |
398 | for (e = current; *e; e++) { |
399 | if (escaped) | |
400 | escaped = false; | |
401 | else if (*e == '\\') | |
402 | escaped = true; | |
403 | else if (*e == '\'') | |
404 | break; | |
405 | } | |
406 | ||
407 | *l = e-current; | |
70f75a52 LP |
408 | *state = (char*) (*e == 0 ? e : e+1); |
409 | ||
034c6ed7 LP |
410 | } else if (*current == '\"') { |
411 | current ++; | |
034c6ed7 | 412 | |
0bab36f2 LP |
413 | for (e = current; *e; e++) { |
414 | if (escaped) | |
415 | escaped = false; | |
416 | else if (*e == '\\') | |
417 | escaped = true; | |
418 | else if (*e == '\"') | |
419 | break; | |
420 | } | |
421 | ||
422 | *l = e-current; | |
70f75a52 LP |
423 | *state = (char*) (*e == 0 ? e : e+1); |
424 | ||
034c6ed7 | 425 | } else { |
0bab36f2 LP |
426 | for (e = current; *e; e++) { |
427 | if (escaped) | |
428 | escaped = false; | |
429 | else if (*e == '\\') | |
430 | escaped = true; | |
431 | else if (strchr(WHITESPACE, *e)) | |
432 | break; | |
433 | } | |
434 | *l = e-current; | |
70f75a52 | 435 | *state = (char*) e; |
034c6ed7 LP |
436 | } |
437 | ||
5b12334d | 438 | return (char*) current; |
034c6ed7 LP |
439 | } |
440 | ||
034c6ed7 LP |
441 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
442 | int r; | |
2fbe635a | 443 | _cleanup_fclose_ FILE *f = NULL; |
49aa47c7 | 444 | char line[LINE_MAX]; |
bb00e604 | 445 | long unsigned ppid; |
49aa47c7 | 446 | const char *p; |
034c6ed7 | 447 | |
49aa47c7 | 448 | assert(pid >= 0); |
034c6ed7 LP |
449 | assert(_ppid); |
450 | ||
49aa47c7 LP |
451 | if (pid == 0) { |
452 | *_ppid = getppid(); | |
453 | return 0; | |
454 | } | |
034c6ed7 | 455 | |
49aa47c7 LP |
456 | p = procfs_file_alloca(pid, "stat"); |
457 | f = fopen(p, "re"); | |
2fbe635a | 458 | if (!f) |
034c6ed7 LP |
459 | return -errno; |
460 | ||
2fbe635a | 461 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 462 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
463 | return r; |
464 | } | |
465 | ||
034c6ed7 LP |
466 | /* Let's skip the pid and comm fields. The latter is enclosed |
467 | * in () but does not escape any () in its value, so let's | |
468 | * skip over it manually */ | |
469 | ||
2fbe635a LP |
470 | p = strrchr(line, ')'); |
471 | if (!p) | |
034c6ed7 LP |
472 | return -EIO; |
473 | ||
474 | p++; | |
475 | ||
476 | if (sscanf(p, " " | |
477 | "%*c " /* state */ | |
bb00e604 | 478 | "%lu ", /* ppid */ |
034c6ed7 LP |
479 | &ppid) != 1) |
480 | return -EIO; | |
481 | ||
bb00e604 | 482 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
483 | return -ERANGE; |
484 | ||
485 | *_ppid = (pid_t) ppid; | |
486 | ||
487 | return 0; | |
488 | } | |
489 | ||
7640a5de | 490 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
e67f47e5 | 491 | _cleanup_fclose_ FILE *f = NULL; |
49aa47c7 LP |
492 | char line[LINE_MAX]; |
493 | const char *p; | |
7640a5de | 494 | |
49aa47c7 | 495 | assert(pid >= 0); |
7640a5de LP |
496 | assert(st); |
497 | ||
49aa47c7 LP |
498 | if (pid == 0) |
499 | p = "/proc/self/stat"; | |
500 | else | |
501 | p = procfs_file_alloca(pid, "stat"); | |
7640a5de | 502 | |
49aa47c7 | 503 | f = fopen(p, "re"); |
e67f47e5 | 504 | if (!f) |
5b12334d | 505 | return errno == ENOENT ? -ESRCH : -errno; |
7640a5de | 506 | |
e67f47e5 LP |
507 | if (!fgets(line, sizeof(line), f)) { |
508 | if (ferror(f)) | |
509 | return -errno; | |
7640a5de | 510 | |
e67f47e5 LP |
511 | return -EIO; |
512 | } | |
7640a5de LP |
513 | |
514 | /* Let's skip the pid and comm fields. The latter is enclosed | |
515 | * in () but does not escape any () in its value, so let's | |
516 | * skip over it manually */ | |
517 | ||
e67f47e5 LP |
518 | p = strrchr(line, ')'); |
519 | if (!p) | |
7640a5de LP |
520 | return -EIO; |
521 | ||
522 | p++; | |
523 | ||
524 | if (sscanf(p, " " | |
525 | "%*c " /* state */ | |
526 | "%*d " /* ppid */ | |
527 | "%*d " /* pgrp */ | |
528 | "%*d " /* session */ | |
529 | "%*d " /* tty_nr */ | |
530 | "%*d " /* tpgid */ | |
531 | "%*u " /* flags */ | |
532 | "%*u " /* minflt */ | |
533 | "%*u " /* cminflt */ | |
534 | "%*u " /* majflt */ | |
535 | "%*u " /* cmajflt */ | |
536 | "%*u " /* utime */ | |
537 | "%*u " /* stime */ | |
538 | "%*d " /* cutime */ | |
539 | "%*d " /* cstime */ | |
540 | "%*d " /* priority */ | |
541 | "%*d " /* nice */ | |
542 | "%*d " /* num_threads */ | |
543 | "%*d " /* itrealvalue */ | |
544 | "%llu " /* starttime */, | |
545 | st) != 1) | |
546 | return -EIO; | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
34ca941c LP |
551 | int fchmod_umask(int fd, mode_t m) { |
552 | mode_t u; | |
553 | int r; | |
554 | ||
555 | u = umask(0777); | |
556 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
557 | umask(u); | |
558 | ||
559 | return r; | |
560 | } | |
561 | ||
7072ced8 LP |
562 | char *truncate_nl(char *s) { |
563 | assert(s); | |
564 | ||
565 | s[strcspn(s, NEWLINE)] = 0; | |
566 | return s; | |
567 | } | |
568 | ||
87d2c1ff | 569 | int get_process_comm(pid_t pid, char **name) { |
49aa47c7 | 570 | const char *p; |
5b12334d | 571 | int r; |
7072ced8 | 572 | |
7072ced8 | 573 | assert(name); |
49aa47c7 | 574 | assert(pid >= 0); |
7072ced8 | 575 | |
87d2c1ff | 576 | if (pid == 0) |
49aa47c7 LP |
577 | p = "/proc/self/comm"; |
578 | else | |
579 | p = procfs_file_alloca(pid, "comm"); | |
7072ced8 | 580 | |
5b12334d LP |
581 | r = read_one_line_file(p, name); |
582 | if (r == -ENOENT) | |
583 | return -ESRCH; | |
584 | ||
585 | return r; | |
7072ced8 LP |
586 | } |
587 | ||
87d2c1ff | 588 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
49aa47c7 | 589 | _cleanup_fclose_ FILE *f = NULL; |
9bdbc2e2 | 590 | char *r = NULL, *k; |
49aa47c7 | 591 | const char *p; |
c59760ee | 592 | int c; |
c59760ee | 593 | |
c59760ee | 594 | assert(line); |
49aa47c7 | 595 | assert(pid >= 0); |
c59760ee | 596 | |
87d2c1ff | 597 | if (pid == 0) |
49aa47c7 LP |
598 | p = "/proc/self/cmdline"; |
599 | else | |
600 | p = procfs_file_alloca(pid, "cmdline"); | |
c59760ee | 601 | |
49aa47c7 | 602 | f = fopen(p, "re"); |
c59760ee LP |
603 | if (!f) |
604 | return -errno; | |
49aa47c7 | 605 | |
9bdbc2e2 | 606 | if (max_length == 0) { |
49aa47c7 LP |
607 | size_t len = 0, allocated = 0; |
608 | ||
9bdbc2e2 | 609 | while ((c = getc(f)) != EOF) { |
49aa47c7 LP |
610 | |
611 | if (!GREEDY_REALLOC(r, allocated, len+2)) { | |
9bdbc2e2 | 612 | free(r); |
9bdbc2e2 LN |
613 | return -ENOMEM; |
614 | } | |
49aa47c7 LP |
615 | |
616 | r[len++] = isprint(c) ? c : ' '; | |
9bdbc2e2 | 617 | } |
49aa47c7 LP |
618 | |
619 | if (len > 0) | |
620 | r[len-1] = 0; | |
621 | ||
9bdbc2e2 LN |
622 | } else { |
623 | bool space = false; | |
624 | size_t left; | |
49aa47c7 | 625 | |
9bdbc2e2 | 626 | r = new(char, max_length); |
49aa47c7 | 627 | if (!r) |
9bdbc2e2 | 628 | return -ENOMEM; |
c59760ee | 629 | |
9bdbc2e2 LN |
630 | k = r; |
631 | left = max_length; | |
632 | while ((c = getc(f)) != EOF) { | |
c59760ee | 633 | |
9bdbc2e2 LN |
634 | if (isprint(c)) { |
635 | if (space) { | |
636 | if (left <= 4) | |
637 | break; | |
638 | ||
639 | *(k++) = ' '; | |
640 | left--; | |
641 | space = false; | |
642 | } | |
c59760ee | 643 | |
c59760ee LP |
644 | if (left <= 4) |
645 | break; | |
646 | ||
9bdbc2e2 | 647 | *(k++) = (char) c; |
057fbb58 | 648 | left--; |
9bdbc2e2 LN |
649 | } else |
650 | space = true; | |
651 | } | |
c59760ee | 652 | |
9bdbc2e2 LN |
653 | if (left <= 4) { |
654 | size_t n = MIN(left-1, 3U); | |
655 | memcpy(k, "...", n); | |
656 | k[n] = 0; | |
657 | } else | |
658 | *k = 0; | |
c59760ee LP |
659 | } |
660 | ||
35d2e7ec | 661 | /* Kernel threads have no argv[] */ |
9bdbc2e2 | 662 | if (r == NULL || r[0] == 0) { |
b47d419c | 663 | _cleanup_free_ char *t = NULL; |
35d2e7ec LP |
664 | int h; |
665 | ||
666 | free(r); | |
667 | ||
87d2c1ff LP |
668 | if (!comm_fallback) |
669 | return -ENOENT; | |
670 | ||
671 | h = get_process_comm(pid, &t); | |
672 | if (h < 0) | |
35d2e7ec LP |
673 | return h; |
674 | ||
b7def684 | 675 | r = strjoin("[", t, "]", NULL); |
87d2c1ff | 676 | if (!r) |
35d2e7ec LP |
677 | return -ENOMEM; |
678 | } | |
fa776d8e | 679 | |
c59760ee LP |
680 | *line = r; |
681 | return 0; | |
682 | } | |
683 | ||
1e5678d0 | 684 | int is_kernel_thread(pid_t pid) { |
49aa47c7 | 685 | const char *p; |
1e5678d0 LP |
686 | size_t count; |
687 | char c; | |
688 | bool eof; | |
689 | FILE *f; | |
690 | ||
691 | if (pid == 0) | |
692 | return 0; | |
693 | ||
49aa47c7 | 694 | assert(pid > 0); |
1e5678d0 | 695 | |
49aa47c7 LP |
696 | p = procfs_file_alloca(pid, "cmdline"); |
697 | f = fopen(p, "re"); | |
1e5678d0 LP |
698 | if (!f) |
699 | return -errno; | |
700 | ||
701 | count = fread(&c, 1, 1, f); | |
702 | eof = feof(f); | |
703 | fclose(f); | |
704 | ||
705 | /* Kernel threads have an empty cmdline */ | |
706 | ||
707 | if (count <= 0) | |
708 | return eof ? 1 : -errno; | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
3a832116 SL |
713 | int get_process_capeff(pid_t pid, char **capeff) { |
714 | const char *p; | |
3a832116 SL |
715 | |
716 | assert(capeff); | |
717 | assert(pid >= 0); | |
718 | ||
719 | if (pid == 0) | |
720 | p = "/proc/self/status"; | |
721 | else | |
722 | p = procfs_file_alloca(pid, "status"); | |
723 | ||
69ab8088 | 724 | return get_status_field(p, "\nCapEff:", capeff); |
3a832116 | 725 | } |
49aa47c7 | 726 | |
87d2c1ff | 727 | int get_process_exe(pid_t pid, char **name) { |
49aa47c7 | 728 | const char *p; |
e79f68d1 ZJS |
729 | char *d; |
730 | int r; | |
87d2c1ff | 731 | |
49aa47c7 | 732 | assert(pid >= 0); |
87d2c1ff LP |
733 | assert(name); |
734 | ||
735 | if (pid == 0) | |
49aa47c7 LP |
736 | p = "/proc/self/exe"; |
737 | else | |
738 | p = procfs_file_alloca(pid, "exe"); | |
87d2c1ff | 739 | |
e79f68d1 ZJS |
740 | r = readlink_malloc(p, name); |
741 | if (r < 0) | |
5b12334d | 742 | return r == -ENOENT ? -ESRCH : r; |
e79f68d1 ZJS |
743 | |
744 | d = endswith(*name, " (deleted)"); | |
745 | if (d) | |
746 | *d = '\0'; | |
747 | ||
748 | return 0; | |
87d2c1ff LP |
749 | } |
750 | ||
901c3d0d | 751 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
f74e605f | 752 | _cleanup_fclose_ FILE *f = NULL; |
9db11a99 | 753 | char line[LINE_MAX]; |
49aa47c7 | 754 | const char *p; |
7e4ab3c5 | 755 | |
f74e605f | 756 | assert(field); |
7e4ab3c5 LP |
757 | assert(uid); |
758 | ||
759 | if (pid == 0) | |
760 | return getuid(); | |
761 | ||
49aa47c7 LP |
762 | p = procfs_file_alloca(pid, "status"); |
763 | f = fopen(p, "re"); | |
7e4ab3c5 LP |
764 | if (!f) |
765 | return -errno; | |
766 | ||
9db11a99 | 767 | FOREACH_LINE(line, f, return -errno) { |
f74e605f | 768 | char *l; |
7e4ab3c5 LP |
769 | |
770 | l = strstrip(line); | |
771 | ||
901c3d0d LP |
772 | if (startswith(l, field)) { |
773 | l += strlen(field); | |
7e4ab3c5 LP |
774 | l += strspn(l, WHITESPACE); |
775 | ||
776 | l[strcspn(l, WHITESPACE)] = 0; | |
777 | ||
f74e605f | 778 | return parse_uid(l, uid); |
7e4ab3c5 LP |
779 | } |
780 | } | |
781 | ||
f74e605f | 782 | return -EIO; |
7e4ab3c5 LP |
783 | } |
784 | ||
901c3d0d LP |
785 | int get_process_uid(pid_t pid, uid_t *uid) { |
786 | return get_process_id(pid, "Uid:", uid); | |
787 | } | |
788 | ||
789 | int get_process_gid(pid_t pid, gid_t *gid) { | |
49aa47c7 | 790 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); |
901c3d0d LP |
791 | return get_process_id(pid, "Gid:", gid); |
792 | } | |
793 | ||
fab56fc5 LP |
794 | char *strnappend(const char *s, const char *suffix, size_t b) { |
795 | size_t a; | |
44d8db9e LP |
796 | char *r; |
797 | ||
fab56fc5 LP |
798 | if (!s && !suffix) |
799 | return strdup(""); | |
800 | ||
801 | if (!s) | |
802 | return strndup(suffix, b); | |
803 | ||
804 | if (!suffix) | |
805 | return strdup(s); | |
806 | ||
44d8db9e LP |
807 | assert(s); |
808 | assert(suffix); | |
809 | ||
810 | a = strlen(s); | |
aa408e77 | 811 | if (b > ((size_t) -1) - a) |
040f18ea | 812 | return NULL; |
44d8db9e | 813 | |
040f18ea LP |
814 | r = new(char, a+b+1); |
815 | if (!r) | |
44d8db9e LP |
816 | return NULL; |
817 | ||
818 | memcpy(r, s, a); | |
819 | memcpy(r+a, suffix, b); | |
820 | r[a+b] = 0; | |
821 | ||
822 | return r; | |
823 | } | |
87f0e418 | 824 | |
fab56fc5 LP |
825 | char *strappend(const char *s, const char *suffix) { |
826 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
827 | } | |
828 | ||
87f0e418 LP |
829 | int readlink_malloc(const char *p, char **r) { |
830 | size_t l = 100; | |
831 | ||
832 | assert(p); | |
833 | assert(r); | |
834 | ||
835 | for (;;) { | |
836 | char *c; | |
837 | ssize_t n; | |
838 | ||
839 | if (!(c = new(char, l))) | |
840 | return -ENOMEM; | |
841 | ||
842 | if ((n = readlink(p, c, l-1)) < 0) { | |
843 | int ret = -errno; | |
844 | free(c); | |
845 | return ret; | |
846 | } | |
847 | ||
848 | if ((size_t) n < l-1) { | |
849 | c[n] = 0; | |
850 | *r = c; | |
851 | return 0; | |
852 | } | |
853 | ||
854 | free(c); | |
855 | l *= 2; | |
856 | } | |
857 | } | |
858 | ||
2c7108c4 | 859 | int readlink_and_make_absolute(const char *p, char **r) { |
1058cbf2 ZJS |
860 | _cleanup_free_ char *target = NULL; |
861 | char *k; | |
2c7108c4 LP |
862 | int j; |
863 | ||
864 | assert(p); | |
865 | assert(r); | |
866 | ||
1058cbf2 ZJS |
867 | j = readlink_malloc(p, &target); |
868 | if (j < 0) | |
2c7108c4 LP |
869 | return j; |
870 | ||
871 | k = file_in_same_dir(p, target); | |
2c7108c4 LP |
872 | if (!k) |
873 | return -ENOMEM; | |
874 | ||
875 | *r = k; | |
876 | return 0; | |
877 | } | |
878 | ||
83096483 LP |
879 | int readlink_and_canonicalize(const char *p, char **r) { |
880 | char *t, *s; | |
881 | int j; | |
882 | ||
883 | assert(p); | |
884 | assert(r); | |
885 | ||
886 | j = readlink_and_make_absolute(p, &t); | |
887 | if (j < 0) | |
888 | return j; | |
889 | ||
890 | s = canonicalize_file_name(t); | |
891 | if (s) { | |
892 | free(t); | |
893 | *r = s; | |
894 | } else | |
895 | *r = t; | |
896 | ||
897 | path_kill_slashes(*r); | |
898 | ||
899 | return 0; | |
900 | } | |
901 | ||
2a987ee8 LP |
902 | int reset_all_signal_handlers(void) { |
903 | int sig; | |
904 | ||
905 | for (sig = 1; sig < _NSIG; sig++) { | |
b92bea5d ZJS |
906 | struct sigaction sa = { |
907 | .sa_handler = SIG_DFL, | |
908 | .sa_flags = SA_RESTART, | |
909 | }; | |
2a987ee8 LP |
910 | |
911 | if (sig == SIGKILL || sig == SIGSTOP) | |
912 | continue; | |
913 | ||
2a987ee8 LP |
914 | /* On Linux the first two RT signals are reserved by |
915 | * glibc, and sigaction() will return EINVAL for them. */ | |
916 | if ((sigaction(sig, &sa, NULL) < 0)) | |
917 | if (errno != EINVAL) | |
918 | return -errno; | |
919 | } | |
920 | ||
8e274523 | 921 | return 0; |
2a987ee8 | 922 | } |
4a72ff34 LP |
923 | |
924 | char *strstrip(char *s) { | |
57a8eca8 | 925 | char *e; |
4a72ff34 LP |
926 | |
927 | /* Drops trailing whitespace. Modifies the string in | |
928 | * place. Returns pointer to first non-space character */ | |
929 | ||
930 | s += strspn(s, WHITESPACE); | |
931 | ||
57a8eca8 LP |
932 | for (e = strchr(s, 0); e > s; e --) |
933 | if (!strchr(WHITESPACE, e[-1])) | |
934 | break; | |
4a72ff34 | 935 | |
57a8eca8 | 936 | *e = 0; |
4a72ff34 LP |
937 | |
938 | return s; | |
4a72ff34 LP |
939 | } |
940 | ||
ee9b5e01 LP |
941 | char *delete_chars(char *s, const char *bad) { |
942 | char *f, *t; | |
943 | ||
944 | /* Drops all whitespace, regardless where in the string */ | |
945 | ||
946 | for (f = s, t = s; *f; f++) { | |
947 | if (strchr(bad, *f)) | |
948 | continue; | |
949 | ||
950 | *(t++) = *f; | |
951 | } | |
952 | ||
953 | *t = 0; | |
954 | ||
955 | return s; | |
956 | } | |
957 | ||
ab1f0633 LP |
958 | bool in_charset(const char *s, const char* charset) { |
959 | const char *i; | |
960 | ||
961 | assert(s); | |
962 | assert(charset); | |
963 | ||
964 | for (i = s; *i; i++) | |
965 | if (!strchr(charset, *i)) | |
966 | return false; | |
967 | ||
968 | return true; | |
969 | } | |
970 | ||
4a72ff34 LP |
971 | char *file_in_same_dir(const char *path, const char *filename) { |
972 | char *e, *r; | |
973 | size_t k; | |
974 | ||
975 | assert(path); | |
976 | assert(filename); | |
977 | ||
978 | /* This removes the last component of path and appends | |
979 | * filename, unless the latter is absolute anyway or the | |
980 | * former isn't */ | |
981 | ||
982 | if (path_is_absolute(filename)) | |
983 | return strdup(filename); | |
984 | ||
985 | if (!(e = strrchr(path, '/'))) | |
986 | return strdup(filename); | |
987 | ||
988 | k = strlen(filename); | |
989 | if (!(r = new(char, e-path+1+k+1))) | |
990 | return NULL; | |
991 | ||
992 | memcpy(r, path, e-path+1); | |
993 | memcpy(r+(e-path)+1, filename, k+1); | |
994 | ||
995 | return r; | |
996 | } | |
fb624d04 | 997 | |
c32dd69b LP |
998 | int rmdir_parents(const char *path, const char *stop) { |
999 | size_t l; | |
1000 | int r = 0; | |
1001 | ||
1002 | assert(path); | |
1003 | assert(stop); | |
1004 | ||
1005 | l = strlen(path); | |
1006 | ||
1007 | /* Skip trailing slashes */ | |
1008 | while (l > 0 && path[l-1] == '/') | |
1009 | l--; | |
1010 | ||
1011 | while (l > 0) { | |
1012 | char *t; | |
1013 | ||
1014 | /* Skip last component */ | |
1015 | while (l > 0 && path[l-1] != '/') | |
1016 | l--; | |
1017 | ||
1018 | /* Skip trailing slashes */ | |
1019 | while (l > 0 && path[l-1] == '/') | |
1020 | l--; | |
1021 | ||
1022 | if (l <= 0) | |
1023 | break; | |
1024 | ||
1025 | if (!(t = strndup(path, l))) | |
1026 | return -ENOMEM; | |
1027 | ||
1028 | if (path_startswith(stop, t)) { | |
1029 | free(t); | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | r = rmdir(t); | |
1034 | free(t); | |
1035 | ||
1036 | if (r < 0) | |
1037 | if (errno != ENOENT) | |
1038 | return -errno; | |
1039 | } | |
1040 | ||
1041 | return 0; | |
1042 | } | |
1043 | ||
fb624d04 LP |
1044 | char hexchar(int x) { |
1045 | static const char table[16] = "0123456789abcdef"; | |
1046 | ||
1047 | return table[x & 15]; | |
1048 | } | |
4fe88d28 LP |
1049 | |
1050 | int unhexchar(char c) { | |
1051 | ||
1052 | if (c >= '0' && c <= '9') | |
1053 | return c - '0'; | |
1054 | ||
1055 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1056 | return c - 'a' + 10; |
4fe88d28 LP |
1057 | |
1058 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1059 | return c - 'A' + 10; |
4fe88d28 LP |
1060 | |
1061 | return -1; | |
1062 | } | |
1063 | ||
66e35261 LP |
1064 | char *hexmem(const void *p, size_t l) { |
1065 | char *r, *z; | |
1066 | const uint8_t *x; | |
1067 | ||
1068 | z = r = malloc(l * 2 + 1); | |
1069 | if (!r) | |
1070 | return NULL; | |
1071 | ||
1072 | for (x = p; x < (const uint8_t*) p + l; x++) { | |
1073 | *(z++) = hexchar(*x >> 4); | |
1074 | *(z++) = hexchar(*x & 15); | |
1075 | } | |
1076 | ||
1077 | *z = 0; | |
1078 | return r; | |
1079 | } | |
1080 | ||
2181a7f5 LP |
1081 | void *unhexmem(const char *p, size_t l) { |
1082 | uint8_t *r, *z; | |
1083 | const char *x; | |
1084 | ||
1085 | assert(p); | |
1086 | ||
1087 | z = r = malloc((l + 1) / 2 + 1); | |
1088 | if (!r) | |
1089 | return NULL; | |
1090 | ||
1091 | for (x = p; x < p + l; x += 2) { | |
1092 | int a, b; | |
1093 | ||
1094 | a = unhexchar(x[0]); | |
1095 | if (x+1 < p + l) | |
1096 | b = unhexchar(x[1]); | |
1097 | else | |
1098 | b = 0; | |
1099 | ||
1100 | *(z++) = (uint8_t) a << 4 | (uint8_t) b; | |
1101 | } | |
1102 | ||
1103 | *z = 0; | |
1104 | return r; | |
1105 | } | |
1106 | ||
4fe88d28 LP |
1107 | char octchar(int x) { |
1108 | return '0' + (x & 7); | |
1109 | } | |
1110 | ||
1111 | int unoctchar(char c) { | |
1112 | ||
1113 | if (c >= '0' && c <= '7') | |
1114 | return c - '0'; | |
1115 | ||
1116 | return -1; | |
1117 | } | |
1118 | ||
5af98f82 LP |
1119 | char decchar(int x) { |
1120 | return '0' + (x % 10); | |
1121 | } | |
1122 | ||
1123 | int undecchar(char c) { | |
1124 | ||
1125 | if (c >= '0' && c <= '9') | |
1126 | return c - '0'; | |
1127 | ||
1128 | return -1; | |
1129 | } | |
1130 | ||
4fe88d28 LP |
1131 | char *cescape(const char *s) { |
1132 | char *r, *t; | |
1133 | const char *f; | |
1134 | ||
1135 | assert(s); | |
1136 | ||
1137 | /* Does C style string escaping. */ | |
1138 | ||
f8e2fb7b LP |
1139 | r = new(char, strlen(s)*4 + 1); |
1140 | if (!r) | |
4fe88d28 LP |
1141 | return NULL; |
1142 | ||
1143 | for (f = s, t = r; *f; f++) | |
1144 | ||
1145 | switch (*f) { | |
1146 | ||
1147 | case '\a': | |
1148 | *(t++) = '\\'; | |
1149 | *(t++) = 'a'; | |
1150 | break; | |
1151 | case '\b': | |
1152 | *(t++) = '\\'; | |
1153 | *(t++) = 'b'; | |
1154 | break; | |
1155 | case '\f': | |
1156 | *(t++) = '\\'; | |
1157 | *(t++) = 'f'; | |
1158 | break; | |
1159 | case '\n': | |
1160 | *(t++) = '\\'; | |
1161 | *(t++) = 'n'; | |
1162 | break; | |
1163 | case '\r': | |
1164 | *(t++) = '\\'; | |
1165 | *(t++) = 'r'; | |
1166 | break; | |
1167 | case '\t': | |
1168 | *(t++) = '\\'; | |
1169 | *(t++) = 't'; | |
1170 | break; | |
1171 | case '\v': | |
1172 | *(t++) = '\\'; | |
1173 | *(t++) = 'v'; | |
1174 | break; | |
1175 | case '\\': | |
1176 | *(t++) = '\\'; | |
1177 | *(t++) = '\\'; | |
1178 | break; | |
1179 | case '"': | |
1180 | *(t++) = '\\'; | |
1181 | *(t++) = '"'; | |
1182 | break; | |
1183 | case '\'': | |
1184 | *(t++) = '\\'; | |
1185 | *(t++) = '\''; | |
1186 | break; | |
1187 | ||
1188 | default: | |
1189 | /* For special chars we prefer octal over | |
1190 | * hexadecimal encoding, simply because glib's | |
1191 | * g_strescape() does the same */ | |
1192 | if ((*f < ' ') || (*f >= 127)) { | |
1193 | *(t++) = '\\'; | |
1194 | *(t++) = octchar((unsigned char) *f >> 6); | |
1195 | *(t++) = octchar((unsigned char) *f >> 3); | |
1196 | *(t++) = octchar((unsigned char) *f); | |
1197 | } else | |
1198 | *(t++) = *f; | |
1199 | break; | |
1200 | } | |
1201 | ||
1202 | *t = 0; | |
1203 | ||
1204 | return r; | |
1205 | } | |
1206 | ||
5b4c61cd | 1207 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1208 | char *r, *t; |
1209 | const char *f; | |
5b4c61cd | 1210 | size_t pl; |
4fe88d28 LP |
1211 | |
1212 | assert(s); | |
1213 | ||
5b4c61cd LP |
1214 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1215 | ||
1216 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1217 | |
5b4c61cd | 1218 | r = new(char, pl+length+1); |
7f110ff9 | 1219 | if (!r) |
4fe88d28 LP |
1220 | return r; |
1221 | ||
5b4c61cd LP |
1222 | if (prefix) |
1223 | memcpy(r, prefix, pl); | |
1224 | ||
1225 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1226 | |
1227 | if (*f != '\\') { | |
1228 | *(t++) = *f; | |
1229 | continue; | |
1230 | } | |
1231 | ||
1232 | f++; | |
1233 | ||
1234 | switch (*f) { | |
1235 | ||
1236 | case 'a': | |
1237 | *(t++) = '\a'; | |
1238 | break; | |
1239 | case 'b': | |
1240 | *(t++) = '\b'; | |
1241 | break; | |
1242 | case 'f': | |
1243 | *(t++) = '\f'; | |
1244 | break; | |
1245 | case 'n': | |
1246 | *(t++) = '\n'; | |
1247 | break; | |
1248 | case 'r': | |
1249 | *(t++) = '\r'; | |
1250 | break; | |
1251 | case 't': | |
1252 | *(t++) = '\t'; | |
1253 | break; | |
1254 | case 'v': | |
1255 | *(t++) = '\v'; | |
1256 | break; | |
1257 | case '\\': | |
1258 | *(t++) = '\\'; | |
1259 | break; | |
1260 | case '"': | |
1261 | *(t++) = '"'; | |
1262 | break; | |
1263 | case '\'': | |
1264 | *(t++) = '\''; | |
1265 | break; | |
1266 | ||
e167fb86 LP |
1267 | case 's': |
1268 | /* This is an extension of the XDG syntax files */ | |
1269 | *(t++) = ' '; | |
1270 | break; | |
1271 | ||
4fe88d28 LP |
1272 | case 'x': { |
1273 | /* hexadecimal encoding */ | |
1274 | int a, b; | |
1275 | ||
7f110ff9 LP |
1276 | a = unhexchar(f[1]); |
1277 | b = unhexchar(f[2]); | |
1278 | ||
1279 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1280 | /* Invalid escape code, let's take it literal then */ |
1281 | *(t++) = '\\'; | |
1282 | *(t++) = 'x'; | |
1283 | } else { | |
1284 | *(t++) = (char) ((a << 4) | b); | |
1285 | f += 2; | |
1286 | } | |
1287 | ||
1288 | break; | |
1289 | } | |
1290 | ||
1291 | case '0': | |
1292 | case '1': | |
1293 | case '2': | |
1294 | case '3': | |
1295 | case '4': | |
1296 | case '5': | |
1297 | case '6': | |
1298 | case '7': { | |
1299 | /* octal encoding */ | |
1300 | int a, b, c; | |
1301 | ||
7f110ff9 LP |
1302 | a = unoctchar(f[0]); |
1303 | b = unoctchar(f[1]); | |
1304 | c = unoctchar(f[2]); | |
1305 | ||
1306 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1307 | /* Invalid escape code, let's take it literal then */ |
1308 | *(t++) = '\\'; | |
1309 | *(t++) = f[0]; | |
1310 | } else { | |
1311 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1312 | f += 2; | |
1313 | } | |
1314 | ||
1315 | break; | |
1316 | } | |
1317 | ||
1318 | case 0: | |
1319 | /* premature end of string.*/ | |
1320 | *(t++) = '\\'; | |
1321 | goto finish; | |
1322 | ||
1323 | default: | |
1324 | /* Invalid escape code, let's take it literal then */ | |
1325 | *(t++) = '\\'; | |
f3d4cc01 | 1326 | *(t++) = *f; |
4fe88d28 LP |
1327 | break; |
1328 | } | |
1329 | } | |
1330 | ||
1331 | finish: | |
1332 | *t = 0; | |
1333 | return r; | |
1334 | } | |
1335 | ||
5b4c61cd LP |
1336 | char *cunescape_length(const char *s, size_t length) { |
1337 | return cunescape_length_with_prefix(s, length, NULL); | |
1338 | } | |
1339 | ||
6febfd0d | 1340 | char *cunescape(const char *s) { |
5b4c61cd LP |
1341 | assert(s); |
1342 | ||
6febfd0d LP |
1343 | return cunescape_length(s, strlen(s)); |
1344 | } | |
4fe88d28 LP |
1345 | |
1346 | char *xescape(const char *s, const char *bad) { | |
1347 | char *r, *t; | |
1348 | const char *f; | |
1349 | ||
1350 | /* Escapes all chars in bad, in addition to \ and all special | |
1351 | * chars, in \xFF style escaping. May be reversed with | |
1352 | * cunescape. */ | |
1353 | ||
08ace05b LP |
1354 | r = new(char, strlen(s) * 4 + 1); |
1355 | if (!r) | |
4fe88d28 LP |
1356 | return NULL; |
1357 | ||
1358 | for (f = s, t = r; *f; f++) { | |
1359 | ||
b866264a LP |
1360 | if ((*f < ' ') || (*f >= 127) || |
1361 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1362 | *(t++) = '\\'; |
1363 | *(t++) = 'x'; | |
1364 | *(t++) = hexchar(*f >> 4); | |
1365 | *(t++) = hexchar(*f); | |
1366 | } else | |
1367 | *(t++) = *f; | |
1368 | } | |
1369 | ||
1370 | *t = 0; | |
1371 | ||
1372 | return r; | |
1373 | } | |
1374 | ||
67d51650 | 1375 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1376 | char *p; |
1377 | ||
67d51650 | 1378 | assert(t); |
4fe88d28 | 1379 | |
67d51650 | 1380 | for (p = t; *p; p++) |
4fe88d28 LP |
1381 | if (*p >= 'A' && *p <= 'Z') |
1382 | *p = *p - 'A' + 'a'; | |
1383 | ||
67d51650 | 1384 | return t; |
4fe88d28 | 1385 | } |
1dccbe19 | 1386 | |
44a6b1b6 | 1387 | _pure_ static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1388 | assert(filename); |
1389 | ||
1390 | return | |
1391 | filename[0] == '.' || | |
6c78be3c | 1392 | streq(filename, "lost+found") || |
e472d476 LP |
1393 | streq(filename, "aquota.user") || |
1394 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1395 | endswith(filename, ".rpmnew") || |
1396 | endswith(filename, ".rpmsave") || | |
1397 | endswith(filename, ".rpmorig") || | |
1398 | endswith(filename, ".dpkg-old") || | |
1399 | endswith(filename, ".dpkg-new") || | |
1400 | endswith(filename, ".swp"); | |
1401 | } | |
1402 | ||
a228a22f LP |
1403 | bool ignore_file(const char *filename) { |
1404 | assert(filename); | |
1405 | ||
1406 | if (endswith(filename, "~")) | |
1407 | return false; | |
1408 | ||
1409 | return ignore_file_allow_backup(filename); | |
1410 | } | |
1411 | ||
3a0ecb08 LP |
1412 | int fd_nonblock(int fd, bool nonblock) { |
1413 | int flags; | |
1414 | ||
1415 | assert(fd >= 0); | |
1416 | ||
1417 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1418 | return -errno; | |
1419 | ||
1420 | if (nonblock) | |
1421 | flags |= O_NONBLOCK; | |
1422 | else | |
1423 | flags &= ~O_NONBLOCK; | |
1424 | ||
1425 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1426 | return -errno; | |
1427 | ||
1428 | return 0; | |
1429 | } | |
1430 | ||
1431 | int fd_cloexec(int fd, bool cloexec) { | |
1432 | int flags; | |
1433 | ||
1434 | assert(fd >= 0); | |
1435 | ||
1436 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1437 | return -errno; | |
1438 | ||
1439 | if (cloexec) | |
1440 | flags |= FD_CLOEXEC; | |
1441 | else | |
1442 | flags &= ~FD_CLOEXEC; | |
1443 | ||
1444 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1445 | return -errno; | |
1446 | ||
1447 | return 0; | |
1448 | } | |
1449 | ||
44a6b1b6 | 1450 | _pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
b19be9eb LP |
1451 | unsigned i; |
1452 | ||
1453 | assert(n_fdset == 0 || fdset); | |
1454 | ||
1455 | for (i = 0; i < n_fdset; i++) | |
1456 | if (fdset[i] == fd) | |
1457 | return true; | |
1458 | ||
1459 | return false; | |
1460 | } | |
1461 | ||
a0d40ac5 LP |
1462 | int close_all_fds(const int except[], unsigned n_except) { |
1463 | DIR *d; | |
1464 | struct dirent *de; | |
1465 | int r = 0; | |
1466 | ||
b19be9eb LP |
1467 | assert(n_except == 0 || except); |
1468 | ||
1469 | d = opendir("/proc/self/fd"); | |
1470 | if (!d) { | |
1471 | int fd; | |
1472 | struct rlimit rl; | |
1473 | ||
1474 | /* When /proc isn't available (for example in chroots) | |
1475 | * the fallback is brute forcing through the fd | |
1476 | * table */ | |
1477 | ||
1478 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1479 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1480 | ||
1481 | if (fd_in_set(fd, except, n_except)) | |
1482 | continue; | |
1483 | ||
1484 | if (close_nointr(fd) < 0) | |
1485 | if (errno != EBADF && r == 0) | |
1486 | r = -errno; | |
1487 | } | |
1488 | ||
1489 | return r; | |
1490 | } | |
a0d40ac5 LP |
1491 | |
1492 | while ((de = readdir(d))) { | |
a7610064 | 1493 | int fd = -1; |
a0d40ac5 | 1494 | |
a16e1123 | 1495 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1496 | continue; |
1497 | ||
720ce21d LP |
1498 | if (safe_atoi(de->d_name, &fd) < 0) |
1499 | /* Let's better ignore this, just in case */ | |
1500 | continue; | |
a0d40ac5 LP |
1501 | |
1502 | if (fd < 3) | |
1503 | continue; | |
1504 | ||
1505 | if (fd == dirfd(d)) | |
1506 | continue; | |
1507 | ||
b19be9eb LP |
1508 | if (fd_in_set(fd, except, n_except)) |
1509 | continue; | |
a0d40ac5 | 1510 | |
720ce21d | 1511 | if (close_nointr(fd) < 0) { |
2f357920 | 1512 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1513 | if (errno != EBADF && r == 0) |
1514 | r = -errno; | |
2f357920 | 1515 | } |
a0d40ac5 LP |
1516 | } |
1517 | ||
a0d40ac5 LP |
1518 | closedir(d); |
1519 | return r; | |
1520 | } | |
1521 | ||
db12775d LP |
1522 | bool chars_intersect(const char *a, const char *b) { |
1523 | const char *p; | |
1524 | ||
1525 | /* Returns true if any of the chars in a are in b. */ | |
1526 | for (p = a; *p; p++) | |
1527 | if (strchr(b, *p)) | |
1528 | return true; | |
1529 | ||
1530 | return false; | |
1531 | } | |
1532 | ||
42856c10 | 1533 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
1534 | static const char table[] = |
1535 | "cifs\0" | |
1536 | "smbfs\0" | |
1537 | "ncpfs\0" | |
dac70dc7 | 1538 | "ncp\0" |
a05f97b3 LP |
1539 | "nfs\0" |
1540 | "nfs4\0" | |
1541 | "gfs\0" | |
73836c5c | 1542 | "gfs2\0"; |
42856c10 | 1543 | |
a05f97b3 | 1544 | return nulstr_contains(table, fstype); |
42856c10 LP |
1545 | } |
1546 | ||
601f6a1e | 1547 | int chvt(int vt) { |
a05f97b3 | 1548 | _cleanup_close_ int fd; |
601f6a1e | 1549 | |
a05f97b3 LP |
1550 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1551 | if (fd < 0) | |
601f6a1e LP |
1552 | return -errno; |
1553 | ||
1554 | if (vt < 0) { | |
1555 | int tiocl[2] = { | |
1556 | TIOCL_GETKMSGREDIRECT, | |
1557 | 0 | |
1558 | }; | |
1559 | ||
a05f97b3 LP |
1560 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1561 | return -errno; | |
601f6a1e LP |
1562 | |
1563 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1564 | } | |
1565 | ||
1566 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1567 | return -errno; |
601f6a1e | 1568 | |
a05f97b3 | 1569 | return 0; |
601f6a1e LP |
1570 | } |
1571 | ||
8f2d43a0 | 1572 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
1573 | struct termios old_termios, new_termios; |
1574 | char c; | |
20c03b7b | 1575 | char line[LINE_MAX]; |
80876c20 LP |
1576 | |
1577 | assert(f); | |
1578 | assert(ret); | |
1579 | ||
1580 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1581 | new_termios = old_termios; | |
1582 | ||
1583 | new_termios.c_lflag &= ~ICANON; | |
1584 | new_termios.c_cc[VMIN] = 1; | |
1585 | new_termios.c_cc[VTIME] = 0; | |
1586 | ||
1587 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1588 | size_t k; | |
1589 | ||
8f2d43a0 LP |
1590 | if (t != (usec_t) -1) { |
1591 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
1592 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1593 | return -ETIMEDOUT; | |
1594 | } | |
1595 | } | |
1596 | ||
80876c20 LP |
1597 | k = fread(&c, 1, 1, f); |
1598 | ||
1599 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1600 | ||
1601 | if (k <= 0) | |
1602 | return -EIO; | |
1603 | ||
1604 | if (need_nl) | |
1605 | *need_nl = c != '\n'; | |
1606 | ||
1607 | *ret = c; | |
1608 | return 0; | |
1609 | } | |
1610 | } | |
1611 | ||
8f2d43a0 LP |
1612 | if (t != (usec_t) -1) |
1613 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
1614 | return -ETIMEDOUT; | |
1615 | ||
1616 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
1617 | return -EIO; |
1618 | ||
1619 | truncate_nl(line); | |
1620 | ||
1621 | if (strlen(line) != 1) | |
1622 | return -EBADMSG; | |
1623 | ||
1624 | if (need_nl) | |
1625 | *need_nl = false; | |
1626 | ||
1627 | *ret = line[0]; | |
1628 | return 0; | |
1629 | } | |
1630 | ||
1631 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 | 1632 | |
80876c20 LP |
1633 | assert(ret); |
1634 | assert(replies); | |
1635 | assert(text); | |
1636 | ||
1637 | for (;;) { | |
1638 | va_list ap; | |
1639 | char c; | |
1640 | int r; | |
1641 | bool need_nl = true; | |
1642 | ||
8481248b | 1643 | if (on_tty()) |
c1072ea0 | 1644 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1645 | |
80876c20 LP |
1646 | va_start(ap, text); |
1647 | vprintf(text, ap); | |
1648 | va_end(ap); | |
1649 | ||
8481248b | 1650 | if (on_tty()) |
c1072ea0 | 1651 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1652 | |
80876c20 LP |
1653 | fflush(stdout); |
1654 | ||
8f2d43a0 LP |
1655 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
1656 | if (r < 0) { | |
80876c20 LP |
1657 | |
1658 | if (r == -EBADMSG) { | |
1659 | puts("Bad input, please try again."); | |
1660 | continue; | |
1661 | } | |
1662 | ||
1663 | putchar('\n'); | |
1664 | return r; | |
1665 | } | |
1666 | ||
1667 | if (need_nl) | |
1668 | putchar('\n'); | |
1669 | ||
1670 | if (strchr(replies, c)) { | |
1671 | *ret = c; | |
1672 | return 0; | |
1673 | } | |
1674 | ||
1675 | puts("Read unexpected character, please try again."); | |
1676 | } | |
1677 | } | |
1678 | ||
512947d4 | 1679 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
1680 | struct termios termios; |
1681 | int r = 0; | |
3fe5e5d4 LP |
1682 | |
1683 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
1684 | |
1685 | assert(fd >= 0); | |
1686 | ||
eed1d0e3 LP |
1687 | /* We leave locked terminal attributes untouched, so that |
1688 | * Plymouth may set whatever it wants to set, and we don't | |
1689 | * interfere with that. */ | |
3fe5e5d4 LP |
1690 | |
1691 | /* Disable exclusive mode, just in case */ | |
1692 | ioctl(fd, TIOCNXCL); | |
1693 | ||
5c0100a5 | 1694 | /* Switch to text mode */ |
512947d4 MS |
1695 | if (switch_to_text) |
1696 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 1697 | |
3fe5e5d4 | 1698 | /* Enable console unicode mode */ |
df465b3f | 1699 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
1700 | |
1701 | if (tcgetattr(fd, &termios) < 0) { | |
1702 | r = -errno; | |
1703 | goto finish; | |
1704 | } | |
1705 | ||
aaf694ca LP |
1706 | /* We only reset the stuff that matters to the software. How |
1707 | * hardware is set up we don't touch assuming that somebody | |
1708 | * else will do that for us */ | |
1709 | ||
1710 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
1711 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
1712 | termios.c_oflag |= ONLCR; | |
1713 | termios.c_cflag |= CREAD; | |
1714 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
1715 | ||
1716 | termios.c_cc[VINTR] = 03; /* ^C */ | |
1717 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
1718 | termios.c_cc[VERASE] = 0177; | |
1719 | termios.c_cc[VKILL] = 025; /* ^X */ | |
1720 | termios.c_cc[VEOF] = 04; /* ^D */ | |
1721 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
1722 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
1723 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
1724 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
1725 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
1726 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
1727 | termios.c_cc[VEOL] = 0; |
1728 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
1729 | |
1730 | termios.c_cc[VTIME] = 0; | |
1731 | termios.c_cc[VMIN] = 1; | |
1732 | ||
1733 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
1734 | r = -errno; | |
1735 | ||
1736 | finish: | |
1737 | /* Just in case, flush all crap out */ | |
1738 | tcflush(fd, TCIOFLUSH); | |
1739 | ||
1740 | return r; | |
1741 | } | |
1742 | ||
6ea832a2 LP |
1743 | int reset_terminal(const char *name) { |
1744 | int fd, r; | |
1745 | ||
1746 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
1747 | if (fd < 0) | |
1748 | return fd; | |
1749 | ||
512947d4 | 1750 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
1751 | close_nointr_nofail(fd); |
1752 | ||
1753 | return r; | |
1754 | } | |
1755 | ||
80876c20 LP |
1756 | int open_terminal(const char *name, int mode) { |
1757 | int fd, r; | |
f73f76ac | 1758 | unsigned c = 0; |
80876c20 | 1759 | |
f73f76ac LP |
1760 | /* |
1761 | * If a TTY is in the process of being closed opening it might | |
1762 | * cause EIO. This is horribly awful, but unlikely to be | |
1763 | * changed in the kernel. Hence we work around this problem by | |
1764 | * retrying a couple of times. | |
1765 | * | |
1766 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
1767 | */ | |
1768 | ||
dd94c17e LP |
1769 | assert(!(mode & O_CREAT)); |
1770 | ||
f73f76ac | 1771 | for (;;) { |
dd94c17e | 1772 | fd = open(name, mode, 0); |
af6da548 | 1773 | if (fd >= 0) |
f73f76ac LP |
1774 | break; |
1775 | ||
1776 | if (errno != EIO) | |
1777 | return -errno; | |
1778 | ||
af6da548 | 1779 | /* Max 1s in total */ |
f73f76ac LP |
1780 | if (c >= 20) |
1781 | return -errno; | |
1782 | ||
1783 | usleep(50 * USEC_PER_MSEC); | |
1784 | c++; | |
1785 | } | |
1786 | ||
1787 | if (fd < 0) | |
80876c20 LP |
1788 | return -errno; |
1789 | ||
af6da548 LP |
1790 | r = isatty(fd); |
1791 | if (r < 0) { | |
80876c20 LP |
1792 | close_nointr_nofail(fd); |
1793 | return -errno; | |
1794 | } | |
1795 | ||
1796 | if (!r) { | |
1797 | close_nointr_nofail(fd); | |
1798 | return -ENOTTY; | |
1799 | } | |
1800 | ||
1801 | return fd; | |
1802 | } | |
1803 | ||
1804 | int flush_fd(int fd) { | |
b92bea5d ZJS |
1805 | struct pollfd pollfd = { |
1806 | .fd = fd, | |
1807 | .events = POLLIN, | |
1808 | }; | |
80876c20 LP |
1809 | |
1810 | for (;;) { | |
20c03b7b | 1811 | char buf[LINE_MAX]; |
80876c20 LP |
1812 | ssize_t l; |
1813 | int r; | |
1814 | ||
e62d8c39 ZJS |
1815 | r = poll(&pollfd, 1, 0); |
1816 | if (r < 0) { | |
80876c20 LP |
1817 | if (errno == EINTR) |
1818 | continue; | |
1819 | ||
1820 | return -errno; | |
80876c20 | 1821 | |
e62d8c39 | 1822 | } else if (r == 0) |
80876c20 LP |
1823 | return 0; |
1824 | ||
e62d8c39 ZJS |
1825 | l = read(fd, buf, sizeof(buf)); |
1826 | if (l < 0) { | |
80876c20 LP |
1827 | |
1828 | if (errno == EINTR) | |
1829 | continue; | |
1830 | ||
1831 | if (errno == EAGAIN) | |
1832 | return 0; | |
1833 | ||
1834 | return -errno; | |
e62d8c39 | 1835 | } else if (l == 0) |
80876c20 LP |
1836 | return 0; |
1837 | } | |
1838 | } | |
1839 | ||
af6da548 LP |
1840 | int acquire_terminal( |
1841 | const char *name, | |
1842 | bool fail, | |
1843 | bool force, | |
1844 | bool ignore_tiocstty_eperm, | |
1845 | usec_t timeout) { | |
1846 | ||
4a0ff478 | 1847 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 1848 | usec_t ts = 0; |
80876c20 LP |
1849 | |
1850 | assert(name); | |
1851 | ||
1852 | /* We use inotify to be notified when the tty is closed. We | |
1853 | * create the watch before checking if we can actually acquire | |
1854 | * it, so that we don't lose any event. | |
1855 | * | |
1856 | * Note: strictly speaking this actually watches for the | |
1857 | * device being closed, it does *not* really watch whether a | |
1858 | * tty loses its controlling process. However, unless some | |
1859 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
1860 | * its tty otherwise this will not become a problem. As long | |
1861 | * as the administrator makes sure not configure any service | |
1862 | * on the same tty as an untrusted user this should not be a | |
1863 | * problem. (Which he probably should not do anyway.) */ | |
1864 | ||
af6da548 LP |
1865 | if (timeout != (usec_t) -1) |
1866 | ts = now(CLOCK_MONOTONIC); | |
1867 | ||
80876c20 | 1868 | if (!fail && !force) { |
af6da548 LP |
1869 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
1870 | if (notify < 0) { | |
80876c20 LP |
1871 | r = -errno; |
1872 | goto fail; | |
1873 | } | |
1874 | ||
af6da548 LP |
1875 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
1876 | if (wd < 0) { | |
80876c20 LP |
1877 | r = -errno; |
1878 | goto fail; | |
1879 | } | |
1880 | } | |
1881 | ||
1882 | for (;;) { | |
b92bea5d ZJS |
1883 | struct sigaction sa_old, sa_new = { |
1884 | .sa_handler = SIG_IGN, | |
1885 | .sa_flags = SA_RESTART, | |
1886 | }; | |
1887 | ||
af6da548 LP |
1888 | if (notify >= 0) { |
1889 | r = flush_fd(notify); | |
1890 | if (r < 0) | |
e3d1855b | 1891 | goto fail; |
af6da548 | 1892 | } |
80876c20 LP |
1893 | |
1894 | /* We pass here O_NOCTTY only so that we can check the return | |
1895 | * value TIOCSCTTY and have a reliable way to figure out if we | |
1896 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
1897 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
1898 | if (fd < 0) | |
6ea832a2 | 1899 | return fd; |
80876c20 | 1900 | |
32c4bef8 LP |
1901 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1902 | * if we already own the tty. */ | |
32c4bef8 LP |
1903 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
1904 | ||
80876c20 | 1905 | /* First, try to get the tty */ |
32c4bef8 LP |
1906 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
1907 | r = -errno; | |
1908 | ||
1909 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
1910 | |
1911 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
1912 | * returning EPERM, i.e. when very likely we already | |
1913 | * are have this controlling terminal. */ | |
32c4bef8 | 1914 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
1915 | r = 0; |
1916 | ||
32c4bef8 | 1917 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
1918 | goto fail; |
1919 | } | |
1920 | ||
1921 | if (r >= 0) | |
1922 | break; | |
1923 | ||
1924 | assert(!fail); | |
1925 | assert(!force); | |
1926 | assert(notify >= 0); | |
1927 | ||
1928 | for (;;) { | |
f601daa7 | 1929 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 1930 | ssize_t l; |
f601daa7 | 1931 | struct inotify_event *e; |
80876c20 | 1932 | |
af6da548 LP |
1933 | if (timeout != (usec_t) -1) { |
1934 | usec_t n; | |
1935 | ||
1936 | n = now(CLOCK_MONOTONIC); | |
1937 | if (ts + timeout < n) { | |
1938 | r = -ETIMEDOUT; | |
1939 | goto fail; | |
1940 | } | |
1941 | ||
1942 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
1943 | if (r < 0) | |
1944 | goto fail; | |
1945 | ||
1946 | if (r == 0) { | |
1947 | r = -ETIMEDOUT; | |
1948 | goto fail; | |
1949 | } | |
1950 | } | |
1951 | ||
1952 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
1953 | if (l < 0) { | |
80876c20 | 1954 | |
af6da548 | 1955 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
1956 | continue; |
1957 | ||
1958 | r = -errno; | |
1959 | goto fail; | |
1960 | } | |
1961 | ||
1962 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 1963 | |
f601daa7 LP |
1964 | while (l > 0) { |
1965 | size_t step; | |
80876c20 | 1966 | |
f601daa7 | 1967 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 1968 | r = -EIO; |
f601daa7 LP |
1969 | goto fail; |
1970 | } | |
80876c20 | 1971 | |
f601daa7 LP |
1972 | step = sizeof(struct inotify_event) + e->len; |
1973 | assert(step <= (size_t) l); | |
80876c20 | 1974 | |
f601daa7 LP |
1975 | e = (struct inotify_event*) ((uint8_t*) e + step); |
1976 | l -= step; | |
80876c20 LP |
1977 | } |
1978 | ||
1979 | break; | |
1980 | } | |
1981 | ||
1982 | /* We close the tty fd here since if the old session | |
1983 | * ended our handle will be dead. It's important that | |
1984 | * we do this after sleeping, so that we don't enter | |
1985 | * an endless loop. */ | |
1986 | close_nointr_nofail(fd); | |
1987 | } | |
1988 | ||
1989 | if (notify >= 0) | |
a16e1123 | 1990 | close_nointr_nofail(notify); |
80876c20 | 1991 | |
512947d4 MS |
1992 | r = reset_terminal_fd(fd, true); |
1993 | if (r < 0) | |
80876c20 LP |
1994 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
1995 | ||
1996 | return fd; | |
1997 | ||
1998 | fail: | |
1999 | if (fd >= 0) | |
a16e1123 | 2000 | close_nointr_nofail(fd); |
80876c20 LP |
2001 | |
2002 | if (notify >= 0) | |
a16e1123 | 2003 | close_nointr_nofail(notify); |
80876c20 LP |
2004 | |
2005 | return r; | |
2006 | } | |
2007 | ||
2008 | int release_terminal(void) { | |
e62d8c39 | 2009 | int r = 0; |
b92bea5d ZJS |
2010 | struct sigaction sa_old, sa_new = { |
2011 | .sa_handler = SIG_IGN, | |
2012 | .sa_flags = SA_RESTART, | |
2013 | }; | |
7fd1b19b | 2014 | _cleanup_close_ int fd; |
80876c20 | 2015 | |
e62d8c39 ZJS |
2016 | fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC); |
2017 | if (fd < 0) | |
80876c20 LP |
2018 | return -errno; |
2019 | ||
57cd2192 LP |
2020 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2021 | * by our own TIOCNOTTY */ | |
57cd2192 LP |
2022 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
2023 | ||
80876c20 LP |
2024 | if (ioctl(fd, TIOCNOTTY) < 0) |
2025 | r = -errno; | |
2026 | ||
57cd2192 LP |
2027 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2028 | ||
80876c20 LP |
2029 | return r; |
2030 | } | |
2031 | ||
9a34ec5f LP |
2032 | int sigaction_many(const struct sigaction *sa, ...) { |
2033 | va_list ap; | |
2034 | int r = 0, sig; | |
2035 | ||
2036 | va_start(ap, sa); | |
2037 | while ((sig = va_arg(ap, int)) > 0) | |
2038 | if (sigaction(sig, sa, NULL) < 0) | |
2039 | r = -errno; | |
2040 | va_end(ap); | |
2041 | ||
2042 | return r; | |
2043 | } | |
2044 | ||
2045 | int ignore_signals(int sig, ...) { | |
b92bea5d ZJS |
2046 | struct sigaction sa = { |
2047 | .sa_handler = SIG_IGN, | |
2048 | .sa_flags = SA_RESTART, | |
2049 | }; | |
9a34ec5f LP |
2050 | va_list ap; |
2051 | int r = 0; | |
a337c6fc | 2052 | |
a337c6fc | 2053 | |
9a34ec5f LP |
2054 | if (sigaction(sig, &sa, NULL) < 0) |
2055 | r = -errno; | |
2056 | ||
2057 | va_start(ap, sig); | |
2058 | while ((sig = va_arg(ap, int)) > 0) | |
2059 | if (sigaction(sig, &sa, NULL) < 0) | |
2060 | r = -errno; | |
2061 | va_end(ap); | |
2062 | ||
2063 | return r; | |
2064 | } | |
2065 | ||
2066 | int default_signals(int sig, ...) { | |
b92bea5d ZJS |
2067 | struct sigaction sa = { |
2068 | .sa_handler = SIG_DFL, | |
2069 | .sa_flags = SA_RESTART, | |
2070 | }; | |
9a34ec5f LP |
2071 | va_list ap; |
2072 | int r = 0; | |
2073 | ||
9a34ec5f LP |
2074 | if (sigaction(sig, &sa, NULL) < 0) |
2075 | r = -errno; | |
2076 | ||
2077 | va_start(ap, sig); | |
2078 | while ((sig = va_arg(ap, int)) > 0) | |
2079 | if (sigaction(sig, &sa, NULL) < 0) | |
2080 | r = -errno; | |
2081 | va_end(ap); | |
2082 | ||
2083 | return r; | |
a337c6fc LP |
2084 | } |
2085 | ||
8d567588 LP |
2086 | int close_pipe(int p[]) { |
2087 | int a = 0, b = 0; | |
2088 | ||
2089 | assert(p); | |
2090 | ||
2091 | if (p[0] >= 0) { | |
2092 | a = close_nointr(p[0]); | |
2093 | p[0] = -1; | |
2094 | } | |
2095 | ||
2096 | if (p[1] >= 0) { | |
2097 | b = close_nointr(p[1]); | |
2098 | p[1] = -1; | |
2099 | } | |
2100 | ||
2101 | return a < 0 ? a : b; | |
2102 | } | |
2103 | ||
eb22ac37 | 2104 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2105 | uint8_t *p; |
2106 | ssize_t n = 0; | |
2107 | ||
2108 | assert(fd >= 0); | |
2109 | assert(buf); | |
2110 | ||
2111 | p = buf; | |
2112 | ||
2113 | while (nbytes > 0) { | |
2114 | ssize_t k; | |
2115 | ||
2116 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2117 | ||
eb22ac37 | 2118 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2119 | continue; |
2120 | ||
eb22ac37 | 2121 | if (k < 0 && errno == EAGAIN && do_poll) { |
b92bea5d ZJS |
2122 | struct pollfd pollfd = { |
2123 | .fd = fd, | |
2124 | .events = POLLIN, | |
2125 | }; | |
8d567588 LP |
2126 | |
2127 | if (poll(&pollfd, 1, -1) < 0) { | |
2128 | if (errno == EINTR) | |
2129 | continue; | |
2130 | ||
2131 | return n > 0 ? n : -errno; | |
2132 | } | |
2133 | ||
c22ceead CJ |
2134 | /* We knowingly ignore the revents value here, |
2135 | * and expect that any error/EOF is reported | |
2136 | * via read()/write() | |
2137 | */ | |
8d567588 LP |
2138 | |
2139 | continue; | |
2140 | } | |
2141 | ||
2142 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2143 | } | |
2144 | ||
2145 | p += k; | |
2146 | nbytes -= k; | |
2147 | n += k; | |
2148 | } | |
2149 | ||
2150 | return n; | |
2151 | } | |
2152 | ||
eb22ac37 LP |
2153 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2154 | const uint8_t *p; | |
2155 | ssize_t n = 0; | |
2156 | ||
2157 | assert(fd >= 0); | |
2158 | assert(buf); | |
2159 | ||
2160 | p = buf; | |
2161 | ||
2162 | while (nbytes > 0) { | |
2163 | ssize_t k; | |
2164 | ||
fe652127 LP |
2165 | k = write(fd, p, nbytes); |
2166 | if (k <= 0) { | |
eb22ac37 LP |
2167 | |
2168 | if (k < 0 && errno == EINTR) | |
2169 | continue; | |
2170 | ||
2171 | if (k < 0 && errno == EAGAIN && do_poll) { | |
b92bea5d ZJS |
2172 | struct pollfd pollfd = { |
2173 | .fd = fd, | |
2174 | .events = POLLOUT, | |
2175 | }; | |
eb22ac37 LP |
2176 | |
2177 | if (poll(&pollfd, 1, -1) < 0) { | |
2178 | if (errno == EINTR) | |
2179 | continue; | |
2180 | ||
2181 | return n > 0 ? n : -errno; | |
2182 | } | |
2183 | ||
c22ceead CJ |
2184 | /* We knowingly ignore the revents value here, |
2185 | * and expect that any error/EOF is reported | |
2186 | * via read()/write() | |
2187 | */ | |
eb22ac37 LP |
2188 | |
2189 | continue; | |
2190 | } | |
2191 | ||
2192 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2193 | } | |
2194 | ||
2195 | p += k; | |
2196 | nbytes -= k; | |
2197 | n += k; | |
2198 | } | |
2199 | ||
2200 | return n; | |
2201 | } | |
2202 | ||
ab1f0633 LP |
2203 | int parse_bytes(const char *t, off_t *bytes) { |
2204 | static const struct { | |
2205 | const char *suffix; | |
b32ff512 | 2206 | unsigned long long factor; |
ab1f0633 LP |
2207 | } table[] = { |
2208 | { "B", 1 }, | |
2209 | { "K", 1024ULL }, | |
2210 | { "M", 1024ULL*1024ULL }, | |
2211 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2212 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2213 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2214 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2215 | { "", 1 }, |
2216 | }; | |
2217 | ||
2218 | const char *p; | |
b32ff512 | 2219 | unsigned long long r = 0; |
ab1f0633 LP |
2220 | |
2221 | assert(t); | |
2222 | assert(bytes); | |
2223 | ||
2224 | p = t; | |
2225 | do { | |
2226 | long long l; | |
2227 | char *e; | |
2228 | unsigned i; | |
2229 | ||
2230 | errno = 0; | |
2231 | l = strtoll(p, &e, 10); | |
2232 | ||
8333c77e | 2233 | if (errno > 0) |
ab1f0633 LP |
2234 | return -errno; |
2235 | ||
2236 | if (l < 0) | |
2237 | return -ERANGE; | |
2238 | ||
2239 | if (e == p) | |
2240 | return -EINVAL; | |
2241 | ||
2242 | e += strspn(e, WHITESPACE); | |
2243 | ||
2244 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2245 | if (startswith(e, table[i].suffix)) { | |
b32ff512 ZJS |
2246 | unsigned long long tmp; |
2247 | if ((unsigned long long) l > ULLONG_MAX / table[i].factor) | |
2248 | return -ERANGE; | |
2249 | tmp = l * table[i].factor; | |
2250 | if (tmp > ULLONG_MAX - r) | |
2251 | return -ERANGE; | |
2252 | ||
2253 | r += tmp; | |
2254 | if ((unsigned long long) (off_t) r != r) | |
2255 | return -ERANGE; | |
2256 | ||
ab1f0633 LP |
2257 | p = e + strlen(table[i].suffix); |
2258 | break; | |
2259 | } | |
2260 | ||
2261 | if (i >= ELEMENTSOF(table)) | |
2262 | return -EINVAL; | |
2263 | ||
b32ff512 | 2264 | } while (*p); |
ab1f0633 LP |
2265 | |
2266 | *bytes = r; | |
2267 | ||
2268 | return 0; | |
2269 | } | |
2270 | ||
843d2643 LP |
2271 | int make_stdio(int fd) { |
2272 | int r, s, t; | |
2273 | ||
2274 | assert(fd >= 0); | |
2275 | ||
73836c5c LP |
2276 | r = dup3(fd, STDIN_FILENO, 0); |
2277 | s = dup3(fd, STDOUT_FILENO, 0); | |
2278 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2279 | |
2280 | if (fd >= 3) | |
2281 | close_nointr_nofail(fd); | |
2282 | ||
2283 | if (r < 0 || s < 0 || t < 0) | |
2284 | return -errno; | |
2285 | ||
73836c5c | 2286 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2287 | |
843d2643 LP |
2288 | return 0; |
2289 | } | |
2290 | ||
ade509ce LP |
2291 | int make_null_stdio(void) { |
2292 | int null_fd; | |
2293 | ||
cd3bd60a LP |
2294 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2295 | if (null_fd < 0) | |
ade509ce LP |
2296 | return -errno; |
2297 | ||
2298 | return make_stdio(null_fd); | |
2299 | } | |
2300 | ||
8407a5d0 LP |
2301 | bool is_device_path(const char *path) { |
2302 | ||
2303 | /* Returns true on paths that refer to a device, either in | |
2304 | * sysfs or in /dev */ | |
2305 | ||
2306 | return | |
2307 | path_startswith(path, "/dev/") || | |
2308 | path_startswith(path, "/sys/"); | |
2309 | } | |
2310 | ||
01f78473 | 2311 | int dir_is_empty(const char *path) { |
a05f97b3 | 2312 | _cleanup_closedir_ DIR *d; |
01f78473 | 2313 | |
a05f97b3 LP |
2314 | d = opendir(path); |
2315 | if (!d) | |
01f78473 LP |
2316 | return -errno; |
2317 | ||
2318 | for (;;) { | |
7d5e9c0f | 2319 | struct dirent *de; |
01f78473 | 2320 | |
3fd11280 FW |
2321 | errno = 0; |
2322 | de = readdir(d); | |
2323 | if (!de && errno != 0) | |
2324 | return -errno; | |
01f78473 | 2325 | |
a05f97b3 LP |
2326 | if (!de) |
2327 | return 1; | |
01f78473 | 2328 | |
a05f97b3 LP |
2329 | if (!ignore_file(de->d_name)) |
2330 | return 0; | |
2331 | } | |
01f78473 LP |
2332 | } |
2333 | ||
844ec79b ZJS |
2334 | char* dirname_malloc(const char *path) { |
2335 | char *d, *dir, *dir2; | |
2336 | ||
2337 | d = strdup(path); | |
2338 | if (!d) | |
2339 | return NULL; | |
2340 | dir = dirname(d); | |
2341 | assert(dir); | |
2342 | ||
2343 | if (dir != d) { | |
2344 | dir2 = strdup(dir); | |
2345 | free(d); | |
2346 | return dir2; | |
2347 | } | |
2348 | ||
2349 | return dir; | |
2350 | } | |
2351 | ||
9bf3b535 LP |
2352 | void random_bytes(void *p, size_t n) { |
2353 | static bool srand_called = false; | |
a05f97b3 | 2354 | _cleanup_close_ int fd; |
9bf3b535 LP |
2355 | ssize_t k; |
2356 | uint8_t *q; | |
d3782d60 | 2357 | |
ac0930c8 LP |
2358 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2359 | if (fd < 0) | |
d3782d60 LP |
2360 | goto fallback; |
2361 | ||
9bf3b535 LP |
2362 | k = loop_read(fd, p, n, true); |
2363 | if (k < 0 || (size_t) k != n) | |
d3782d60 LP |
2364 | goto fallback; |
2365 | ||
9bf3b535 | 2366 | return; |
d3782d60 LP |
2367 | |
2368 | fallback: | |
d3782d60 | 2369 | |
9bf3b535 | 2370 | if (!srand_called) { |
a3b6fafe | 2371 | |
9bf3b535 LP |
2372 | #ifdef HAVE_SYS_AUXV_H |
2373 | /* The kernel provides us with a bit of entropy in | |
2374 | * auxv, so let's try to make use of that to seed the | |
2375 | * pseudo-random generator. It's better than | |
2376 | * nothing... */ | |
a3b6fafe | 2377 | |
9bf3b535 LP |
2378 | void *auxv; |
2379 | ||
2380 | auxv = (void*) getauxval(AT_RANDOM); | |
2381 | if (auxv) | |
2382 | srand(*(unsigned*) auxv); | |
2383 | else | |
2384 | #endif | |
2385 | srand(time(NULL) + gettid()); | |
a3b6fafe | 2386 | |
9bf3b535 LP |
2387 | srand_called = true; |
2388 | } | |
a3b6fafe | 2389 | |
9bf3b535 LP |
2390 | /* If some idiot made /dev/urandom unavailable to us, he'll |
2391 | * get a PRNG instead. */ | |
2392 | for (q = p; q < (uint8_t*) p + n; q ++) | |
2393 | *q = rand(); | |
a3b6fafe LP |
2394 | } |
2395 | ||
5b6319dc LP |
2396 | void rename_process(const char name[8]) { |
2397 | assert(name); | |
2398 | ||
5d6b1584 LP |
2399 | /* This is a like a poor man's setproctitle(). It changes the |
2400 | * comm field, argv[0], and also the glibc's internally used | |
2401 | * name of the process. For the first one a limit of 16 chars | |
2402 | * applies, to the second one usually one of 10 (i.e. length | |
2403 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2404 | * "systemd"). If you pass a longer string it will be | |
2405 | * truncated */ | |
5b6319dc | 2406 | |
5d6b1584 | 2407 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2408 | |
2409 | if (program_invocation_name) | |
2410 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2411 | |
2412 | if (saved_argc > 0) { | |
2413 | int i; | |
2414 | ||
2415 | if (saved_argv[0]) | |
2416 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2417 | ||
2418 | for (i = 1; i < saved_argc; i++) { | |
2419 | if (!saved_argv[i]) | |
2420 | break; | |
2421 | ||
2422 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
2423 | } | |
2424 | } | |
5b6319dc LP |
2425 | } |
2426 | ||
7d793605 LP |
2427 | void sigset_add_many(sigset_t *ss, ...) { |
2428 | va_list ap; | |
2429 | int sig; | |
2430 | ||
2431 | assert(ss); | |
2432 | ||
2433 | va_start(ap, ss); | |
2434 | while ((sig = va_arg(ap, int)) > 0) | |
2435 | assert_se(sigaddset(ss, sig) == 0); | |
2436 | va_end(ap); | |
2437 | } | |
2438 | ||
ef2f1067 LP |
2439 | char* gethostname_malloc(void) { |
2440 | struct utsname u; | |
2441 | ||
2442 | assert_se(uname(&u) >= 0); | |
2443 | ||
344de609 | 2444 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2445 | return strdup(u.nodename); |
2446 | ||
2447 | return strdup(u.sysname); | |
2448 | } | |
2449 | ||
344de609 LP |
2450 | bool hostname_is_set(void) { |
2451 | struct utsname u; | |
2452 | ||
2453 | assert_se(uname(&u) >= 0); | |
2454 | ||
2455 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2456 | } | |
2457 | ||
7c5f152a | 2458 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2459 | long bufsize; |
a05f97b3 LP |
2460 | char *name; |
2461 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2462 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2463 | |
2464 | /* Shortcut things to avoid NSS lookups */ | |
2465 | if (uid == 0) | |
2466 | return strdup("root"); | |
2467 | ||
7c5f152a LP |
2468 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2469 | if (bufsize <= 0) | |
ef2f1067 LP |
2470 | bufsize = 4096; |
2471 | ||
7c5f152a LP |
2472 | buf = malloc(bufsize); |
2473 | if (!buf) | |
ef2f1067 LP |
2474 | return NULL; |
2475 | ||
a05f97b3 LP |
2476 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2477 | return strdup(pw->pw_name); | |
ef2f1067 LP |
2478 | |
2479 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
2480 | return NULL; | |
2481 | ||
2482 | return name; | |
2483 | } | |
2484 | ||
7c5f152a LP |
2485 | char* getlogname_malloc(void) { |
2486 | uid_t uid; | |
2487 | struct stat st; | |
2488 | ||
2489 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2490 | uid = st.st_uid; | |
2491 | else | |
2492 | uid = getuid(); | |
2493 | ||
2494 | return lookup_uid(uid); | |
2495 | } | |
2496 | ||
2497 | char *getusername_malloc(void) { | |
2498 | const char *e; | |
2499 | ||
2500 | e = getenv("USER"); | |
2501 | if (e) | |
2502 | return strdup(e); | |
2503 | ||
2504 | return lookup_uid(getuid()); | |
2505 | } | |
2506 | ||
fc116c6a LP |
2507 | int getttyname_malloc(int fd, char **r) { |
2508 | char path[PATH_MAX], *c; | |
618e02c7 | 2509 | int k; |
8c6db833 LP |
2510 | |
2511 | assert(r); | |
ef2f1067 | 2512 | |
a05f97b3 | 2513 | k = ttyname_r(fd, path, sizeof(path)); |
27373e44 | 2514 | if (k > 0) |
618e02c7 | 2515 | return -k; |
ef2f1067 LP |
2516 | |
2517 | char_array_0(path); | |
2518 | ||
a05f97b3 LP |
2519 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2520 | if (!c) | |
8c6db833 LP |
2521 | return -ENOMEM; |
2522 | ||
2523 | *r = c; | |
2524 | return 0; | |
2525 | } | |
2526 | ||
fc116c6a LP |
2527 | int getttyname_harder(int fd, char **r) { |
2528 | int k; | |
2529 | char *s; | |
2530 | ||
a05f97b3 LP |
2531 | k = getttyname_malloc(fd, &s); |
2532 | if (k < 0) | |
fc116c6a LP |
2533 | return k; |
2534 | ||
2535 | if (streq(s, "tty")) { | |
2536 | free(s); | |
4d6d6518 | 2537 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2538 | } |
2539 | ||
2540 | *r = s; | |
2541 | return 0; | |
2542 | } | |
2543 | ||
4d6d6518 | 2544 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
49aa47c7 LP |
2545 | _cleanup_fclose_ FILE *f = NULL; |
2546 | char line[LINE_MAX], *p; | |
fc116c6a | 2547 | unsigned long ttynr; |
49aa47c7 | 2548 | const char *fn; |
fc116c6a | 2549 | |
49aa47c7 | 2550 | assert(pid >= 0); |
49aa47c7 LP |
2551 | |
2552 | if (pid == 0) | |
2553 | fn = "/proc/self/stat"; | |
2554 | else | |
2555 | fn = procfs_file_alloca(pid, "stat"); | |
4d6d6518 LP |
2556 | |
2557 | f = fopen(fn, "re"); | |
4d6d6518 | 2558 | if (!f) |
fc116c6a LP |
2559 | return -errno; |
2560 | ||
0bee65f0 LP |
2561 | if (!fgets(line, sizeof(line), f)) |
2562 | return feof(f) ? -EIO : -errno; | |
fc116c6a | 2563 | |
4d6d6518 LP |
2564 | p = strrchr(line, ')'); |
2565 | if (!p) | |
fc116c6a LP |
2566 | return -EIO; |
2567 | ||
2568 | p++; | |
2569 | ||
2570 | if (sscanf(p, " " | |
2571 | "%*c " /* state */ | |
2572 | "%*d " /* ppid */ | |
2573 | "%*d " /* pgrp */ | |
2574 | "%*d " /* session */ | |
2575 | "%lu ", /* ttynr */ | |
2576 | &ttynr) != 1) | |
2577 | return -EIO; | |
2578 | ||
11dc5d2b LP |
2579 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2580 | return -ENOENT; | |
2581 | ||
0bee65f0 LP |
2582 | if (d) |
2583 | *d = (dev_t) ttynr; | |
2584 | ||
fc116c6a LP |
2585 | return 0; |
2586 | } | |
2587 | ||
4d6d6518 | 2588 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 2589 | int k; |
fa70beaa | 2590 | char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *s, *b, *p; |
fc116c6a LP |
2591 | dev_t devnr; |
2592 | ||
2593 | assert(r); | |
2594 | ||
4d6d6518 LP |
2595 | k = get_ctty_devnr(pid, &devnr); |
2596 | if (k < 0) | |
fc116c6a LP |
2597 | return k; |
2598 | ||
2599 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
fc116c6a | 2600 | |
23406ce5 LP |
2601 | k = readlink_malloc(fn, &s); |
2602 | if (k < 0) { | |
fc116c6a LP |
2603 | |
2604 | if (k != -ENOENT) | |
2605 | return k; | |
2606 | ||
46824d0e LP |
2607 | /* This is an ugly hack */ |
2608 | if (major(devnr) == 136) { | |
2609 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
2610 | return -ENOMEM; | |
2611 | ||
2612 | *r = b; | |
2613 | if (_devnr) | |
2614 | *_devnr = devnr; | |
2615 | ||
2616 | return 0; | |
2617 | } | |
2618 | ||
fc116c6a LP |
2619 | /* Probably something like the ptys which have no |
2620 | * symlink in /dev/char. Let's return something | |
2621 | * vaguely useful. */ | |
2622 | ||
23406ce5 LP |
2623 | b = strdup(fn + 5); |
2624 | if (!b) | |
fc116c6a LP |
2625 | return -ENOMEM; |
2626 | ||
2627 | *r = b; | |
46824d0e LP |
2628 | if (_devnr) |
2629 | *_devnr = devnr; | |
2630 | ||
fc116c6a LP |
2631 | return 0; |
2632 | } | |
2633 | ||
2634 | if (startswith(s, "/dev/")) | |
2635 | p = s + 5; | |
2636 | else if (startswith(s, "../")) | |
2637 | p = s + 3; | |
2638 | else | |
2639 | p = s; | |
2640 | ||
2641 | b = strdup(p); | |
2642 | free(s); | |
2643 | ||
2644 | if (!b) | |
2645 | return -ENOMEM; | |
2646 | ||
2647 | *r = b; | |
46824d0e LP |
2648 | if (_devnr) |
2649 | *_devnr = devnr; | |
2650 | ||
fc116c6a LP |
2651 | return 0; |
2652 | } | |
2653 | ||
f56d5db9 | 2654 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
2655 | DIR *d; |
2656 | int ret = 0; | |
2657 | ||
2658 | assert(fd >= 0); | |
2659 | ||
2660 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2661 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2662 | |
d4d046e3 LP |
2663 | d = fdopendir(fd); |
2664 | if (!d) { | |
8c6db833 | 2665 | close_nointr_nofail(fd); |
4c633005 LP |
2666 | |
2667 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2668 | } |
2669 | ||
2670 | for (;;) { | |
7d5e9c0f | 2671 | struct dirent *de; |
7925c22a LP |
2672 | bool is_dir, keep_around; |
2673 | struct stat st; | |
8c6db833 LP |
2674 | int r; |
2675 | ||
3fd11280 FW |
2676 | errno = 0; |
2677 | de = readdir(d); | |
2678 | if (!de && errno != 0) { | |
2679 | if (ret == 0) | |
2680 | ret = -errno; | |
8c6db833 LP |
2681 | break; |
2682 | } | |
2683 | ||
2684 | if (!de) | |
2685 | break; | |
2686 | ||
2687 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
2688 | continue; | |
2689 | ||
7925c22a LP |
2690 | if (de->d_type == DT_UNKNOWN || |
2691 | honour_sticky || | |
2692 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2693 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2694 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2695 | ret = -errno; |
2696 | continue; | |
2697 | } | |
2698 | ||
2699 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2700 | keep_around = |
2701 | honour_sticky && | |
2702 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2703 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2704 | } else { |
8c6db833 | 2705 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2706 | keep_around = false; |
ad293f5a | 2707 | } |
8c6db833 LP |
2708 | |
2709 | if (is_dir) { | |
2710 | int subdir_fd; | |
8c6db833 | 2711 | |
597f43c7 | 2712 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
2713 | if (root_dev && st.st_dev != root_dev->st_dev) |
2714 | continue; | |
8c6db833 | 2715 | |
7925c22a LP |
2716 | subdir_fd = openat(fd, de->d_name, |
2717 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
2718 | if (subdir_fd < 0) { | |
2719 | if (ret == 0 && errno != ENOENT) | |
2720 | ret = -errno; | |
2721 | continue; | |
2722 | } | |
2723 | ||
b3d28469 | 2724 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
2725 | if (r < 0 && ret == 0) |
2726 | ret = r; | |
2727 | ||
2728 | if (!keep_around) | |
2729 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
2730 | if (ret == 0 && errno != ENOENT) |
2731 | ret = -errno; | |
2732 | } | |
2733 | ||
2734 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
2735 | |
2736 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 2737 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2738 | ret = -errno; |
2739 | } | |
2740 | } | |
2741 | } | |
2742 | ||
2743 | closedir(d); | |
2744 | ||
2745 | return ret; | |
2746 | } | |
2747 | ||
44a6b1b6 | 2748 | _pure_ static int is_temporary_fs(struct statfs *s) { |
943aad8c | 2749 | assert(s); |
73020ab2 SL |
2750 | |
2751 | return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) || | |
2752 | F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC); | |
943aad8c ZJS |
2753 | } |
2754 | ||
f56d5db9 LP |
2755 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
2756 | struct statfs s; | |
2757 | ||
2758 | assert(fd >= 0); | |
2759 | ||
2760 | if (fstatfs(fd, &s) < 0) { | |
2761 | close_nointr_nofail(fd); | |
2762 | return -errno; | |
2763 | } | |
2764 | ||
2765 | /* We refuse to clean disk file systems with this call. This | |
2766 | * is extra paranoia just to be sure we never ever remove | |
2767 | * non-state data */ | |
943aad8c | 2768 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2769 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2770 | close_nointr_nofail(fd); | |
2771 | return -EPERM; | |
2772 | } | |
2773 | ||
2774 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
2775 | } | |
2776 | ||
2777 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
2778 | int fd, r; | |
2779 | struct statfs s; | |
8c6db833 LP |
2780 | |
2781 | assert(path); | |
2782 | ||
f56d5db9 LP |
2783 | /* We refuse to clean the root file system with this |
2784 | * call. This is extra paranoia to never cause a really | |
2785 | * seriously broken system. */ | |
2786 | if (path_equal(path, "/")) { | |
2787 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
2788 | return -EPERM; | |
2789 | } | |
461b1822 | 2790 | |
d4d046e3 LP |
2791 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
2792 | if (fd < 0) { | |
8c6db833 LP |
2793 | |
2794 | if (errno != ENOTDIR) | |
2795 | return -errno; | |
2796 | ||
f56d5db9 LP |
2797 | if (!dangerous) { |
2798 | if (statfs(path, &s) < 0) | |
2799 | return -errno; | |
2800 | ||
943aad8c | 2801 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2802 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2803 | return -EPERM; | |
2804 | } | |
2805 | } | |
2806 | ||
8c6db833 | 2807 | if (delete_root && !only_dirs) |
d4d046e3 | 2808 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
2809 | return -errno; |
2810 | ||
2811 | return 0; | |
2812 | } | |
2813 | ||
f56d5db9 LP |
2814 | if (!dangerous) { |
2815 | if (fstatfs(fd, &s) < 0) { | |
2816 | close_nointr_nofail(fd); | |
2817 | return -errno; | |
2818 | } | |
ad293f5a | 2819 | |
943aad8c | 2820 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2821 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2822 | close_nointr_nofail(fd); | |
2823 | return -EPERM; | |
2824 | } | |
2825 | } | |
2826 | ||
2827 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
2828 | if (delete_root) { |
2829 | ||
8d53b453 | 2830 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 2831 | return r; |
8c6db833 | 2832 | |
e27796a0 | 2833 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
2834 | if (r == 0) |
2835 | r = -errno; | |
2836 | } | |
ad293f5a | 2837 | } |
8c6db833 LP |
2838 | |
2839 | return r; | |
2840 | } | |
2841 | ||
f56d5db9 LP |
2842 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
2843 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
2844 | } | |
2845 | ||
2846 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
2847 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
2848 | } | |
2849 | ||
8c6db833 LP |
2850 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
2851 | assert(path); | |
2852 | ||
2853 | /* Under the assumption that we are running privileged we | |
2854 | * first change the access mode and only then hand out | |
2855 | * ownership to avoid a window where access is too open. */ | |
2856 | ||
8d53b453 LP |
2857 | if (mode != (mode_t) -1) |
2858 | if (chmod(path, mode) < 0) | |
2859 | return -errno; | |
8c6db833 | 2860 | |
8d53b453 LP |
2861 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2862 | if (chown(path, uid, gid) < 0) | |
2863 | return -errno; | |
8c6db833 LP |
2864 | |
2865 | return 0; | |
ef2f1067 LP |
2866 | } |
2867 | ||
f4b47811 LP |
2868 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
2869 | assert(fd >= 0); | |
2870 | ||
2871 | /* Under the assumption that we are running privileged we | |
2872 | * first change the access mode and only then hand out | |
2873 | * ownership to avoid a window where access is too open. */ | |
2874 | ||
9588bc32 LP |
2875 | if (mode != (mode_t) -1) |
2876 | if (fchmod(fd, mode) < 0) | |
2877 | return -errno; | |
f4b47811 | 2878 | |
9588bc32 LP |
2879 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2880 | if (fchown(fd, uid, gid) < 0) | |
2881 | return -errno; | |
f4b47811 LP |
2882 | |
2883 | return 0; | |
2884 | } | |
2885 | ||
82c121a4 LP |
2886 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2887 | cpu_set_t *r; | |
2888 | unsigned n = 1024; | |
2889 | ||
2890 | /* Allocates the cpuset in the right size */ | |
2891 | ||
2892 | for (;;) { | |
2893 | if (!(r = CPU_ALLOC(n))) | |
2894 | return NULL; | |
2895 | ||
2896 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2897 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2898 | ||
2899 | if (ncpus) | |
2900 | *ncpus = n; | |
2901 | ||
2902 | return r; | |
2903 | } | |
2904 | ||
2905 | CPU_FREE(r); | |
2906 | ||
2907 | if (errno != EINVAL) | |
2908 | return NULL; | |
2909 | ||
2910 | n *= 2; | |
2911 | } | |
2912 | } | |
2913 | ||
984a2be4 | 2914 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) { |
9ab7a8d2 | 2915 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
2916 | _cleanup_free_ char *s = NULL; |
2917 | _cleanup_close_ int fd = -1; | |
b92bea5d | 2918 | struct iovec iovec[6] = {}; |
81beb750 | 2919 | int n = 0; |
984a2be4 | 2920 | static bool prev_ephemeral; |
9e58ff9c LP |
2921 | |
2922 | assert(format); | |
2923 | ||
9ab7a8d2 | 2924 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
2925 | * optional and go exclusively to the console. */ |
2926 | ||
2927 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 2928 | return log_oom(); |
9e58ff9c | 2929 | |
67e5cc4f | 2930 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 2931 | if (fd < 0) |
669bec5d | 2932 | return fd; |
9e58ff9c | 2933 | |
67e5cc4f | 2934 | if (ellipse) { |
9ab7a8d2 MS |
2935 | char *e; |
2936 | size_t emax, sl; | |
2937 | int c; | |
2938 | ||
67e5cc4f LP |
2939 | c = fd_columns(fd); |
2940 | if (c <= 0) | |
2941 | c = 80; | |
81beb750 | 2942 | |
669bec5d | 2943 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
2944 | |
2945 | emax = c - sl - 1; | |
2946 | if (emax < 3) | |
2947 | emax = 3; | |
81beb750 | 2948 | |
67e5cc4f LP |
2949 | e = ellipsize(s, emax, 75); |
2950 | if (e) { | |
2951 | free(s); | |
2952 | s = e; | |
2953 | } | |
81beb750 LP |
2954 | } |
2955 | ||
984a2be4 MS |
2956 | if (prev_ephemeral) |
2957 | IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE); | |
2958 | prev_ephemeral = ephemeral; | |
2959 | ||
9ab7a8d2 MS |
2960 | if (status) { |
2961 | if (!isempty(status)) { | |
2962 | IOVEC_SET_STRING(iovec[n++], "["); | |
2963 | IOVEC_SET_STRING(iovec[n++], status); | |
2964 | IOVEC_SET_STRING(iovec[n++], "] "); | |
2965 | } else | |
2966 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
2967 | } |
2968 | ||
9ab7a8d2 | 2969 | IOVEC_SET_STRING(iovec[n++], s); |
984a2be4 MS |
2970 | if (!ephemeral) |
2971 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 2972 | |
669bec5d LP |
2973 | if (writev(fd, iovec, n) < 0) |
2974 | return -errno; | |
9e58ff9c | 2975 | |
669bec5d | 2976 | return 0; |
9e58ff9c LP |
2977 | } |
2978 | ||
984a2be4 | 2979 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) { |
c846ff47 | 2980 | va_list ap; |
669bec5d | 2981 | int r; |
c846ff47 LP |
2982 | |
2983 | assert(format); | |
2984 | ||
2985 | va_start(ap, format); | |
984a2be4 | 2986 | r = status_vprintf(status, ellipse, ephemeral, format, ap); |
c846ff47 | 2987 | va_end(ap); |
669bec5d LP |
2988 | |
2989 | return r; | |
c846ff47 LP |
2990 | } |
2991 | ||
669bec5d | 2992 | int status_welcome(void) { |
669bec5d | 2993 | _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL; |
9588bc32 | 2994 | int r; |
669bec5d LP |
2995 | |
2996 | r = parse_env_file("/etc/os-release", NEWLINE, | |
2997 | "PRETTY_NAME", &pretty_name, | |
2998 | "ANSI_COLOR", &ansi_color, | |
2999 | NULL); | |
9588bc32 | 3000 | |
669bec5d LP |
3001 | if (r < 0 && r != -ENOENT) |
3002 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3003 | ||
f620dff8 | 3004 | return status_printf(NULL, false, false, |
669bec5d LP |
3005 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", |
3006 | isempty(ansi_color) ? "1" : ansi_color, | |
3007 | isempty(pretty_name) ? "Linux" : pretty_name); | |
c846ff47 LP |
3008 | } |
3009 | ||
fab56fc5 LP |
3010 | char *replace_env(const char *format, char **env) { |
3011 | enum { | |
3012 | WORD, | |
c24eb49e | 3013 | CURLY, |
fab56fc5 LP |
3014 | VARIABLE |
3015 | } state = WORD; | |
3016 | ||
3017 | const char *e, *word = format; | |
3018 | char *r = NULL, *k; | |
3019 | ||
3020 | assert(format); | |
3021 | ||
3022 | for (e = format; *e; e ++) { | |
3023 | ||
3024 | switch (state) { | |
3025 | ||
3026 | case WORD: | |
3027 | if (*e == '$') | |
c24eb49e | 3028 | state = CURLY; |
fab56fc5 LP |
3029 | break; |
3030 | ||
c24eb49e LP |
3031 | case CURLY: |
3032 | if (*e == '{') { | |
fab56fc5 LP |
3033 | if (!(k = strnappend(r, word, e-word-1))) |
3034 | goto fail; | |
3035 | ||
3036 | free(r); | |
3037 | r = k; | |
3038 | ||
3039 | word = e-1; | |
3040 | state = VARIABLE; | |
3041 | ||
3042 | } else if (*e == '$') { | |
3043 | if (!(k = strnappend(r, word, e-word))) | |
3044 | goto fail; | |
3045 | ||
3046 | free(r); | |
3047 | r = k; | |
3048 | ||
3049 | word = e+1; | |
3050 | state = WORD; | |
3051 | } else | |
3052 | state = WORD; | |
3053 | break; | |
3054 | ||
3055 | case VARIABLE: | |
c24eb49e | 3056 | if (*e == '}') { |
b95cf362 | 3057 | const char *t; |
fab56fc5 | 3058 | |
4d1a6904 | 3059 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 3060 | |
4d1a6904 LP |
3061 | k = strappend(r, t); |
3062 | if (!k) | |
b95cf362 | 3063 | goto fail; |
fab56fc5 | 3064 | |
b95cf362 LP |
3065 | free(r); |
3066 | r = k; | |
fab56fc5 | 3067 | |
b95cf362 | 3068 | word = e+1; |
fab56fc5 LP |
3069 | state = WORD; |
3070 | } | |
3071 | break; | |
3072 | } | |
3073 | } | |
3074 | ||
3075 | if (!(k = strnappend(r, word, e-word))) | |
3076 | goto fail; | |
3077 | ||
3078 | free(r); | |
3079 | return k; | |
3080 | ||
3081 | fail: | |
3082 | free(r); | |
3083 | return NULL; | |
3084 | } | |
3085 | ||
3086 | char **replace_env_argv(char **argv, char **env) { | |
3087 | char **r, **i; | |
c24eb49e LP |
3088 | unsigned k = 0, l = 0; |
3089 | ||
3090 | l = strv_length(argv); | |
fab56fc5 | 3091 | |
c24eb49e | 3092 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3093 | return NULL; |
3094 | ||
3095 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3096 | |
3097 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3098 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3099 | char *e; | |
3100 | char **w, **m; | |
3101 | unsigned q; | |
c24eb49e | 3102 | |
4d1a6904 LP |
3103 | e = strv_env_get(env, *i+1); |
3104 | if (e) { | |
c24eb49e LP |
3105 | |
3106 | if (!(m = strv_split_quoted(e))) { | |
3107 | r[k] = NULL; | |
3108 | strv_free(r); | |
3109 | return NULL; | |
3110 | } | |
b95cf362 LP |
3111 | } else |
3112 | m = NULL; | |
c24eb49e | 3113 | |
b95cf362 LP |
3114 | q = strv_length(m); |
3115 | l = l + q - 1; | |
c24eb49e | 3116 | |
b95cf362 LP |
3117 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3118 | r[k] = NULL; | |
3119 | strv_free(r); | |
3120 | strv_free(m); | |
3121 | return NULL; | |
3122 | } | |
c24eb49e | 3123 | |
b95cf362 LP |
3124 | r = w; |
3125 | if (m) { | |
c24eb49e LP |
3126 | memcpy(r + k, m, q * sizeof(char*)); |
3127 | free(m); | |
c24eb49e | 3128 | } |
b95cf362 LP |
3129 | |
3130 | k += q; | |
3131 | continue; | |
c24eb49e LP |
3132 | } |
3133 | ||
3134 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3135 | if (!(r[k++] = replace_env(*i, env))) { |
3136 | strv_free(r); | |
3137 | return NULL; | |
3138 | } | |
3139 | } | |
3140 | ||
3141 | r[k] = NULL; | |
3142 | return r; | |
3143 | } | |
3144 | ||
81beb750 | 3145 | int fd_columns(int fd) { |
b92bea5d | 3146 | struct winsize ws = {}; |
81beb750 LP |
3147 | |
3148 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3149 | return -errno; | |
3150 | ||
3151 | if (ws.ws_col <= 0) | |
3152 | return -EIO; | |
3153 | ||
3154 | return ws.ws_col; | |
3155 | } | |
3156 | ||
28917d7d | 3157 | unsigned columns(void) { |
fa776d8e | 3158 | const char *e; |
7009eec2 | 3159 | int c; |
fa776d8e | 3160 | |
28917d7d LP |
3161 | if (_likely_(cached_columns > 0)) |
3162 | return cached_columns; | |
11f96fac | 3163 | |
28917d7d LP |
3164 | c = 0; |
3165 | e = getenv("COLUMNS"); | |
3166 | if (e) | |
7009eec2 | 3167 | safe_atoi(e, &c); |
fa776d8e | 3168 | |
28917d7d LP |
3169 | if (c <= 0) |
3170 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3171 | |
28917d7d LP |
3172 | if (c <= 0) |
3173 | c = 80; | |
11f96fac | 3174 | |
28917d7d LP |
3175 | cached_columns = c; |
3176 | return c; | |
11f96fac ZJS |
3177 | } |
3178 | ||
8f2d43a0 | 3179 | int fd_lines(int fd) { |
b92bea5d | 3180 | struct winsize ws = {}; |
8f2d43a0 LP |
3181 | |
3182 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3183 | return -errno; | |
3184 | ||
3185 | if (ws.ws_row <= 0) | |
3186 | return -EIO; | |
3187 | ||
3188 | return ws.ws_row; | |
3189 | } | |
3190 | ||
3191 | unsigned lines(void) { | |
8f2d43a0 | 3192 | const char *e; |
ed757c0c | 3193 | unsigned l; |
8f2d43a0 | 3194 | |
ed757c0c LP |
3195 | if (_likely_(cached_lines > 0)) |
3196 | return cached_lines; | |
8f2d43a0 | 3197 | |
ed757c0c | 3198 | l = 0; |
8f2d43a0 LP |
3199 | e = getenv("LINES"); |
3200 | if (e) | |
ed757c0c | 3201 | safe_atou(e, &l); |
8f2d43a0 | 3202 | |
ed757c0c LP |
3203 | if (l <= 0) |
3204 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3205 | |
ed757c0c LP |
3206 | if (l <= 0) |
3207 | l = 24; | |
8f2d43a0 | 3208 | |
ed757c0c LP |
3209 | cached_lines = l; |
3210 | return cached_lines; | |
3211 | } | |
3212 | ||
3213 | /* intended to be used as a SIGWINCH sighandler */ | |
3214 | void columns_lines_cache_reset(int signum) { | |
3215 | cached_columns = 0; | |
3216 | cached_lines = 0; | |
3217 | } | |
3218 | ||
3219 | bool on_tty(void) { | |
3220 | static int cached_on_tty = -1; | |
3221 | ||
3222 | if (_unlikely_(cached_on_tty < 0)) | |
3223 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3224 | ||
3225 | return cached_on_tty; | |
8f2d43a0 LP |
3226 | } |
3227 | ||
b4f10a5e | 3228 | int running_in_chroot(void) { |
b92bea5d | 3229 | struct stat a = {}, b = {}; |
b4f10a5e LP |
3230 | |
3231 | /* Only works as root */ | |
b4f10a5e LP |
3232 | if (stat("/proc/1/root", &a) < 0) |
3233 | return -errno; | |
3234 | ||
3235 | if (stat("/", &b) < 0) | |
3236 | return -errno; | |
3237 | ||
3238 | return | |
3239 | a.st_dev != b.st_dev || | |
3240 | a.st_ino != b.st_ino; | |
3241 | } | |
3242 | ||
f405e86d | 3243 | static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
72f59706 | 3244 | size_t x; |
8fe914ec LP |
3245 | char *r; |
3246 | ||
3247 | assert(s); | |
3248 | assert(percent <= 100); | |
72f59706 | 3249 | assert(new_length >= 3); |
8fe914ec | 3250 | |
72f59706 LP |
3251 | if (old_length <= 3 || old_length <= new_length) |
3252 | return strndup(s, old_length); | |
8fe914ec | 3253 | |
72f59706 LP |
3254 | r = new0(char, new_length+1); |
3255 | if (!r) | |
a6f0104a | 3256 | return NULL; |
8fe914ec | 3257 | |
72f59706 | 3258 | x = (new_length * percent) / 100; |
8fe914ec | 3259 | |
72f59706 LP |
3260 | if (x > new_length - 3) |
3261 | x = new_length - 3; | |
8fe914ec LP |
3262 | |
3263 | memcpy(r, s, x); | |
3264 | r[x] = '.'; | |
3265 | r[x+1] = '.'; | |
3266 | r[x+2] = '.'; | |
3267 | memcpy(r + x + 3, | |
72f59706 LP |
3268 | s + old_length - (new_length - x - 3), |
3269 | new_length - x - 3); | |
8fe914ec LP |
3270 | |
3271 | return r; | |
3272 | } | |
3273 | ||
f405e86d SL |
3274 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3275 | size_t x; | |
3276 | char *e; | |
3277 | const char *i, *j; | |
3278 | unsigned k, len, len2; | |
3279 | ||
3280 | assert(s); | |
3281 | assert(percent <= 100); | |
3282 | assert(new_length >= 3); | |
3283 | ||
3284 | /* if no multibyte characters use ascii_ellipsize_mem for speed */ | |
3285 | if (ascii_is_valid(s)) | |
3286 | return ascii_ellipsize_mem(s, old_length, new_length, percent); | |
3287 | ||
3288 | if (old_length <= 3 || old_length <= new_length) | |
3289 | return strndup(s, old_length); | |
3290 | ||
3291 | x = (new_length * percent) / 100; | |
3292 | ||
3293 | if (x > new_length - 3) | |
3294 | x = new_length - 3; | |
3295 | ||
3296 | k = 0; | |
3297 | for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) { | |
3298 | int c; | |
3299 | ||
3300 | c = utf8_encoded_to_unichar(i); | |
3301 | if (c < 0) | |
3302 | return NULL; | |
3303 | k += unichar_iswide(c) ? 2 : 1; | |
3304 | } | |
3305 | ||
3306 | if (k > x) /* last character was wide and went over quota */ | |
3307 | x ++; | |
3308 | ||
3309 | for (j = s + old_length; k < new_length && j > i; ) { | |
3310 | int c; | |
3311 | ||
3312 | j = utf8_prev_char(j); | |
3313 | c = utf8_encoded_to_unichar(j); | |
3314 | if (c < 0) | |
3315 | return NULL; | |
3316 | k += unichar_iswide(c) ? 2 : 1; | |
3317 | } | |
3318 | assert(i <= j); | |
3319 | ||
3320 | /* we don't actually need to ellipsize */ | |
3321 | if (i == j) | |
3322 | return memdup(s, old_length + 1); | |
3323 | ||
3324 | /* make space for ellipsis */ | |
3325 | j = utf8_next_char(j); | |
3326 | ||
3327 | len = i - s; | |
3328 | len2 = s + old_length - j; | |
3329 | e = new(char, len + 3 + len2 + 1); | |
3330 | if (!e) | |
3331 | return NULL; | |
3332 | ||
3333 | /* | |
3334 | printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n", | |
3335 | old_length, new_length, x, len, len2, k); | |
3336 | */ | |
3337 | ||
3338 | memcpy(e, s, len); | |
3339 | e[len] = 0xe2; /* tri-dot ellipsis: … */ | |
3340 | e[len + 1] = 0x80; | |
3341 | e[len + 2] = 0xa6; | |
3342 | ||
3343 | memcpy(e + len + 3, j, len2 + 1); | |
3344 | ||
3345 | return e; | |
3346 | } | |
3347 | ||
72f59706 LP |
3348 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3349 | return ellipsize_mem(s, strlen(s), length, percent); | |
3350 | } | |
3351 | ||
f6144808 LP |
3352 | int touch(const char *path) { |
3353 | int fd; | |
3354 | ||
3355 | assert(path); | |
3356 | ||
73836c5c LP |
3357 | /* This just opens the file for writing, ensuring it |
3358 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3359 | * does it. */ | |
3360 | ||
3361 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3362 | if (fd < 0) | |
f6144808 LP |
3363 | return -errno; |
3364 | ||
3365 | close_nointr_nofail(fd); | |
3366 | return 0; | |
3367 | } | |
afea26ad | 3368 | |
97c4a07d | 3369 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3370 | size_t l; |
3371 | assert(s); | |
3372 | ||
73836c5c LP |
3373 | /* This is rather stupid, simply removes the heading and |
3374 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3375 | * escaping or anything. We should make this smarter one |
3376 | * day...*/ | |
73836c5c | 3377 | |
31ed59c5 LP |
3378 | l = strlen(s); |
3379 | if (l < 2) | |
11ce3427 LP |
3380 | return strdup(s); |
3381 | ||
97c4a07d | 3382 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3383 | return strndup(s+1, l-2); |
3384 | ||
3385 | return strdup(s); | |
3386 | } | |
3387 | ||
5f7c426e | 3388 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3389 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3390 | char *eq, *r; | |
5f7c426e | 3391 | |
57f30678 LP |
3392 | eq = strchr(s, '='); |
3393 | if (!eq) { | |
3394 | char *t; | |
5f7c426e | 3395 | |
57f30678 LP |
3396 | r = strdup(s); |
3397 | if (!r) | |
5f7c426e LP |
3398 | return NULL; |
3399 | ||
57f30678 LP |
3400 | t = strstrip(r); |
3401 | if (t == r) | |
3402 | return r; | |
3403 | ||
3404 | memmove(r, t, strlen(t) + 1); | |
3405 | return r; | |
5f7c426e LP |
3406 | } |
3407 | ||
57f30678 LP |
3408 | name = strndup(s, eq - s); |
3409 | if (!name) | |
5f7c426e LP |
3410 | return NULL; |
3411 | ||
57f30678 LP |
3412 | p = strdup(eq + 1); |
3413 | if (!p) | |
5f7c426e | 3414 | return NULL; |
5f7c426e LP |
3415 | |
3416 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3417 | if (!value) |
5f7c426e | 3418 | return NULL; |
5f7c426e | 3419 | |
57f30678 | 3420 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3421 | r = NULL; |
3422 | ||
5f7c426e LP |
3423 | return r; |
3424 | } | |
3425 | ||
8e12a6ae | 3426 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3427 | siginfo_t dummy; |
3428 | ||
2e78aa99 | 3429 | assert(pid >= 1); |
1968a360 LP |
3430 | |
3431 | if (!status) | |
3432 | status = &dummy; | |
2e78aa99 LP |
3433 | |
3434 | for (;;) { | |
8e12a6ae LP |
3435 | zero(*status); |
3436 | ||
3437 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3438 | |
3439 | if (errno == EINTR) | |
3440 | continue; | |
3441 | ||
3442 | return -errno; | |
3443 | } | |
3444 | ||
3445 | return 0; | |
3446 | } | |
3447 | } | |
3448 | ||
97c4a07d LP |
3449 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3450 | int r; | |
3451 | siginfo_t status; | |
3452 | ||
3453 | assert(name); | |
3454 | assert(pid > 1); | |
3455 | ||
d87be9b0 LP |
3456 | r = wait_for_terminate(pid, &status); |
3457 | if (r < 0) { | |
97c4a07d LP |
3458 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3459 | return r; | |
3460 | } | |
3461 | ||
3462 | if (status.si_code == CLD_EXITED) { | |
3463 | if (status.si_status != 0) { | |
3464 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3465 | return status.si_status; |
97c4a07d LP |
3466 | } |
3467 | ||
3468 | log_debug("%s succeeded.", name); | |
3469 | return 0; | |
3470 | ||
3471 | } else if (status.si_code == CLD_KILLED || | |
3472 | status.si_code == CLD_DUMPED) { | |
3473 | ||
3474 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3475 | return -EPROTO; | |
3476 | } | |
3477 | ||
3478 | log_warning("%s failed due to unknown reason.", name); | |
3479 | return -EPROTO; | |
97c4a07d LP |
3480 | } |
3481 | ||
919ce0b7 | 3482 | noreturn void freeze(void) { |
720ce21d LP |
3483 | |
3484 | /* Make sure nobody waits for us on a socket anymore */ | |
3485 | close_all_fds(NULL, 0); | |
3486 | ||
c29597a1 LP |
3487 | sync(); |
3488 | ||
3c14d26c LP |
3489 | for (;;) |
3490 | pause(); | |
3491 | } | |
3492 | ||
00dc5d76 LP |
3493 | bool null_or_empty(struct stat *st) { |
3494 | assert(st); | |
3495 | ||
3496 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3497 | return true; | |
3498 | ||
c8f26f42 | 3499 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3500 | return true; |
3501 | ||
3502 | return false; | |
3503 | } | |
3504 | ||
83096483 LP |
3505 | int null_or_empty_path(const char *fn) { |
3506 | struct stat st; | |
3507 | ||
3508 | assert(fn); | |
3509 | ||
3510 | if (stat(fn, &st) < 0) | |
3511 | return -errno; | |
3512 | ||
3513 | return null_or_empty(&st); | |
3514 | } | |
3515 | ||
a247755d | 3516 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3517 | int nfd; |
3518 | DIR *d; | |
3519 | ||
dd94c17e LP |
3520 | assert(!(flags & O_CREAT)); |
3521 | ||
3522 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
73836c5c | 3523 | if (nfd < 0) |
c4731d11 LP |
3524 | return NULL; |
3525 | ||
73836c5c LP |
3526 | d = fdopendir(nfd); |
3527 | if (!d) { | |
c4731d11 LP |
3528 | close_nointr_nofail(nfd); |
3529 | return NULL; | |
3530 | } | |
3531 | ||
3532 | return d; | |
3b63d2d3 LP |
3533 | } |
3534 | ||
8a0867d6 LP |
3535 | int signal_from_string_try_harder(const char *s) { |
3536 | int signo; | |
3537 | assert(s); | |
3538 | ||
73836c5c LP |
3539 | signo = signal_from_string(s); |
3540 | if (signo <= 0) | |
8a0867d6 LP |
3541 | if (startswith(s, "SIG")) |
3542 | return signal_from_string(s+3); | |
3543 | ||
3544 | return signo; | |
3545 | } | |
3546 | ||
383182b5 | 3547 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
22f5f628 DR |
3548 | _cleanup_free_ char *t = NULL, *u = NULL; |
3549 | char *dn; | |
3550 | size_t enc_len; | |
e23a0ce8 | 3551 | |
383182b5 DR |
3552 | u = unquote(tagvalue, "\"\'"); |
3553 | if (u == NULL) | |
3554 | return NULL; | |
e23a0ce8 | 3555 | |
1d5989fd | 3556 | enc_len = strlen(u) * 4 + 1; |
22f5f628 | 3557 | t = new(char, enc_len); |
383182b5 DR |
3558 | if (t == NULL) |
3559 | return NULL; | |
e23a0ce8 | 3560 | |
8f6ce71f | 3561 | if (encode_devnode_name(u, t, enc_len) < 0) |
22f5f628 | 3562 | return NULL; |
e23a0ce8 | 3563 | |
22f5f628 | 3564 | if (asprintf(&dn, "/dev/disk/by-%s/%s", by, t) < 0) |
383182b5 | 3565 | return NULL; |
e23a0ce8 | 3566 | |
383182b5 DR |
3567 | return dn; |
3568 | } | |
e23a0ce8 | 3569 | |
383182b5 | 3570 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3571 | assert(p); |
3572 | ||
383182b5 DR |
3573 | if (startswith(p, "LABEL=")) |
3574 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3575 | |
383182b5 DR |
3576 | if (startswith(p, "UUID=")) |
3577 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3578 | |
84cc2abf DR |
3579 | if (startswith(p, "PARTUUID=")) |
3580 | return tag_to_udev_node(p+9, "partuuid"); | |
3581 | ||
3582 | if (startswith(p, "PARTLABEL=")) | |
3583 | return tag_to_udev_node(p+10, "partlabel"); | |
3584 | ||
e23a0ce8 LP |
3585 | return strdup(p); |
3586 | } | |
3587 | ||
f212ac12 LP |
3588 | bool tty_is_vc(const char *tty) { |
3589 | assert(tty); | |
3590 | ||
3591 | if (startswith(tty, "/dev/")) | |
3592 | tty += 5; | |
3593 | ||
98a28fef LP |
3594 | return vtnr_from_tty(tty) >= 0; |
3595 | } | |
3596 | ||
d1122ad5 LP |
3597 | bool tty_is_console(const char *tty) { |
3598 | assert(tty); | |
3599 | ||
3600 | if (startswith(tty, "/dev/")) | |
3601 | tty += 5; | |
3602 | ||
3603 | return streq(tty, "console"); | |
3604 | } | |
3605 | ||
98a28fef LP |
3606 | int vtnr_from_tty(const char *tty) { |
3607 | int i, r; | |
3608 | ||
3609 | assert(tty); | |
3610 | ||
3611 | if (startswith(tty, "/dev/")) | |
3612 | tty += 5; | |
3613 | ||
3614 | if (!startswith(tty, "tty") ) | |
3615 | return -EINVAL; | |
3616 | ||
3617 | if (tty[3] < '0' || tty[3] > '9') | |
3618 | return -EINVAL; | |
3619 | ||
3620 | r = safe_atoi(tty+3, &i); | |
3621 | if (r < 0) | |
3622 | return r; | |
3623 | ||
3624 | if (i < 0 || i > 63) | |
3625 | return -EINVAL; | |
3626 | ||
3627 | return i; | |
f212ac12 LP |
3628 | } |
3629 | ||
21baf21a MS |
3630 | char *resolve_dev_console(char **active) { |
3631 | char *tty; | |
3632 | ||
3633 | /* Resolve where /dev/console is pointing to, if /sys is actually ours | |
3634 | * (i.e. not read-only-mounted which is a sign for container setups) */ | |
3635 | ||
3636 | if (path_is_read_only_fs("/sys") > 0) | |
3637 | return NULL; | |
3638 | ||
3639 | if (read_one_line_file("/sys/class/tty/console/active", active) < 0) | |
3640 | return NULL; | |
3641 | ||
3642 | /* If multiple log outputs are configured the last one is what | |
3643 | * /dev/console points to */ | |
3644 | tty = strrchr(*active, ' '); | |
3645 | if (tty) | |
3646 | tty++; | |
3647 | else | |
3648 | tty = *active; | |
3649 | ||
8aa5429a OB |
3650 | if (streq(tty, "tty0")) { |
3651 | char *tmp; | |
3652 | ||
3653 | /* Get the active VC (e.g. tty1) */ | |
3654 | if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) { | |
3655 | free(*active); | |
3656 | tty = *active = tmp; | |
3657 | } | |
3658 | } | |
3659 | ||
21baf21a MS |
3660 | return tty; |
3661 | } | |
3662 | ||
3043935f | 3663 | bool tty_is_vc_resolve(const char *tty) { |
9588bc32 | 3664 | _cleanup_free_ char *active = NULL; |
3030ccd7 | 3665 | |
e3aa71c3 LP |
3666 | assert(tty); |
3667 | ||
3668 | if (startswith(tty, "/dev/")) | |
3669 | tty += 5; | |
3670 | ||
21baf21a MS |
3671 | if (streq(tty, "console")) { |
3672 | tty = resolve_dev_console(&active); | |
3673 | if (!tty) | |
3674 | return false; | |
3675 | } | |
3030ccd7 | 3676 | |
9588bc32 | 3677 | return tty_is_vc(tty); |
3043935f LP |
3678 | } |
3679 | ||
3680 | const char *default_term_for_tty(const char *tty) { | |
3681 | assert(tty); | |
3682 | ||
acda6a05 | 3683 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3684 | } |
3685 | ||
87d2c1ff | 3686 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3687 | assert(de); |
3688 | ||
3689 | if (ignore_file(de->d_name)) | |
3690 | return false; | |
3691 | ||
3692 | if (de->d_type != DT_REG && | |
3693 | de->d_type != DT_LNK && | |
3694 | de->d_type != DT_UNKNOWN) | |
3695 | return false; | |
3696 | ||
3697 | return true; | |
3698 | } | |
3699 | ||
87d2c1ff LP |
3700 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3701 | assert(de); | |
3702 | ||
a228a22f LP |
3703 | if (de->d_type != DT_REG && |
3704 | de->d_type != DT_LNK && | |
3705 | de->d_type != DT_UNKNOWN) | |
3706 | return false; | |
3707 | ||
3708 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3709 | return false; |
3710 | ||
3711 | return endswith(de->d_name, suffix); | |
3712 | } | |
3713 | ||
83cc030f LP |
3714 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
3715 | DIR *_d = NULL; | |
3716 | struct dirent *de; | |
3717 | Hashmap *pids = NULL; | |
3718 | ||
3719 | assert(directory); | |
3720 | ||
650001c6 JJ |
3721 | /* Executes all binaries in a directory in parallel and |
3722 | * waits for them to finish. */ | |
83cc030f LP |
3723 | |
3724 | if (!d) { | |
3725 | if (!(_d = opendir(directory))) { | |
3726 | ||
3727 | if (errno == ENOENT) | |
3728 | return; | |
3729 | ||
3730 | log_error("Failed to enumerate directory %s: %m", directory); | |
3731 | return; | |
3732 | } | |
3733 | ||
3734 | d = _d; | |
3735 | } | |
3736 | ||
3737 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
3738 | log_error("Failed to allocate set."); | |
3739 | goto finish; | |
3740 | } | |
3741 | ||
3742 | while ((de = readdir(d))) { | |
3743 | char *path; | |
3744 | pid_t pid; | |
3745 | int k; | |
3746 | ||
fb19a739 | 3747 | if (!dirent_is_file(de)) |
83cc030f LP |
3748 | continue; |
3749 | ||
3750 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 3751 | log_oom(); |
83cc030f LP |
3752 | continue; |
3753 | } | |
3754 | ||
3755 | if ((pid = fork()) < 0) { | |
3756 | log_error("Failed to fork: %m"); | |
3757 | free(path); | |
3758 | continue; | |
3759 | } | |
3760 | ||
3761 | if (pid == 0) { | |
3762 | char *_argv[2]; | |
3763 | /* Child */ | |
3764 | ||
3765 | if (!argv) { | |
3766 | _argv[0] = path; | |
3767 | _argv[1] = NULL; | |
3768 | argv = _argv; | |
3769 | } else | |
6edd7d0a | 3770 | argv[0] = path; |
83cc030f LP |
3771 | |
3772 | execv(path, argv); | |
3773 | ||
3774 | log_error("Failed to execute %s: %m", path); | |
3775 | _exit(EXIT_FAILURE); | |
3776 | } | |
3777 | ||
3778 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
3779 | ||
3780 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
3781 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
3782 | free(path); | |
3783 | } | |
3784 | } | |
3785 | ||
3786 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 3787 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
b92bea5d | 3788 | siginfo_t si = {}; |
83cc030f LP |
3789 | char *path; |
3790 | ||
ec3f9b53 | 3791 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
3792 | |
3793 | if (errno == EINTR) | |
3794 | continue; | |
3795 | ||
3796 | log_error("waitid() failed: %m"); | |
3797 | goto finish; | |
3798 | } | |
3799 | ||
3800 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 3801 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
3802 | if (si.si_code == CLD_EXITED) |
3803 | log_error("%s exited with exit status %i.", path, si.si_status); | |
3804 | else | |
3805 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
3806 | } else | |
3807 | log_debug("%s exited successfully.", path); | |
3808 | ||
3809 | free(path); | |
3810 | } | |
3811 | } | |
3812 | ||
3813 | finish: | |
3814 | if (_d) | |
3815 | closedir(_d); | |
3816 | ||
3817 | if (pids) | |
3818 | hashmap_free_free(pids); | |
3819 | } | |
3820 | ||
430c18ed LP |
3821 | int kill_and_sigcont(pid_t pid, int sig) { |
3822 | int r; | |
3823 | ||
3824 | r = kill(pid, sig) < 0 ? -errno : 0; | |
3825 | ||
3826 | if (r >= 0) | |
3827 | kill(pid, SIGCONT); | |
3828 | ||
3829 | return r; | |
3830 | } | |
3831 | ||
05feefe0 LP |
3832 | bool nulstr_contains(const char*nulstr, const char *needle) { |
3833 | const char *i; | |
3834 | ||
3835 | if (!nulstr) | |
3836 | return false; | |
3837 | ||
3838 | NULSTR_FOREACH(i, nulstr) | |
3839 | if (streq(i, needle)) | |
3840 | return true; | |
3841 | ||
3842 | return false; | |
3843 | } | |
3844 | ||
6faa1114 | 3845 | bool plymouth_running(void) { |
9408a2d2 | 3846 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
3847 | } |
3848 | ||
9beb3f4d LP |
3849 | char* strshorten(char *s, size_t l) { |
3850 | assert(s); | |
3851 | ||
3852 | if (l < strlen(s)) | |
3853 | s[l] = 0; | |
3854 | ||
3855 | return s; | |
3856 | } | |
3857 | ||
3858 | static bool hostname_valid_char(char c) { | |
3859 | return | |
3860 | (c >= 'a' && c <= 'z') || | |
3861 | (c >= 'A' && c <= 'Z') || | |
3862 | (c >= '0' && c <= '9') || | |
3863 | c == '-' || | |
3864 | c == '_' || | |
3865 | c == '.'; | |
3866 | } | |
3867 | ||
3868 | bool hostname_is_valid(const char *s) { | |
3869 | const char *p; | |
aa3c5cf8 | 3870 | bool dot; |
9beb3f4d LP |
3871 | |
3872 | if (isempty(s)) | |
3873 | return false; | |
3874 | ||
aa3c5cf8 LP |
3875 | for (p = s, dot = true; *p; p++) { |
3876 | if (*p == '.') { | |
3877 | if (dot) | |
3878 | return false; | |
3879 | ||
3880 | dot = true; | |
3881 | } else { | |
3882 | if (!hostname_valid_char(*p)) | |
3883 | return false; | |
3884 | ||
3885 | dot = false; | |
3886 | } | |
3887 | } | |
3888 | ||
3889 | if (dot) | |
3890 | return false; | |
9beb3f4d LP |
3891 | |
3892 | if (p-s > HOST_NAME_MAX) | |
3893 | return false; | |
3894 | ||
3895 | return true; | |
3896 | } | |
3897 | ||
e724b063 | 3898 | char* hostname_cleanup(char *s, bool lowercase) { |
9beb3f4d | 3899 | char *p, *d; |
cec4ead9 LP |
3900 | bool dot; |
3901 | ||
3902 | for (p = s, d = s, dot = true; *p; p++) { | |
3903 | if (*p == '.') { | |
e724b063 | 3904 | if (dot) |
cec4ead9 | 3905 | continue; |
9beb3f4d | 3906 | |
e724b063 | 3907 | *(d++) = '.'; |
cec4ead9 | 3908 | dot = true; |
e724b063 LP |
3909 | } else if (hostname_valid_char(*p)) { |
3910 | *(d++) = lowercase ? tolower(*p) : *p; | |
cec4ead9 | 3911 | dot = false; |
e724b063 | 3912 | } |
cec4ead9 | 3913 | |
cec4ead9 | 3914 | } |
9beb3f4d | 3915 | |
e724b063 LP |
3916 | if (dot && d > s) |
3917 | d[-1] = 0; | |
3918 | else | |
3919 | *d = 0; | |
3920 | ||
9beb3f4d | 3921 | strshorten(s, HOST_NAME_MAX); |
cec4ead9 | 3922 | |
9beb3f4d LP |
3923 | return s; |
3924 | } | |
3925 | ||
1325aa42 | 3926 | int pipe_eof(int fd) { |
1325aa42 | 3927 | int r; |
b92bea5d ZJS |
3928 | struct pollfd pollfd = { |
3929 | .fd = fd, | |
3930 | .events = POLLIN|POLLHUP, | |
3931 | }; | |
1325aa42 LP |
3932 | |
3933 | r = poll(&pollfd, 1, 0); | |
3934 | if (r < 0) | |
3935 | return -errno; | |
3936 | ||
3937 | if (r == 0) | |
3938 | return 0; | |
3939 | ||
3940 | return pollfd.revents & POLLHUP; | |
3941 | } | |
3942 | ||
8f2d43a0 | 3943 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b | 3944 | int r; |
b92bea5d ZJS |
3945 | struct pollfd pollfd = { |
3946 | .fd = fd, | |
3947 | .events = event, | |
3948 | }; | |
df50185b | 3949 | |
8f2d43a0 | 3950 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
3951 | if (r < 0) |
3952 | return -errno; | |
3953 | ||
3954 | if (r == 0) | |
3955 | return 0; | |
3956 | ||
3957 | return pollfd.revents; | |
3958 | } | |
3959 | ||
5a3ab509 LP |
3960 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
3961 | FILE *f; | |
3962 | char *t; | |
3963 | const char *fn; | |
3964 | size_t k; | |
3965 | int fd; | |
3966 | ||
3967 | assert(path); | |
3968 | assert(_f); | |
3969 | assert(_temp_path); | |
3970 | ||
3971 | t = new(char, strlen(path) + 1 + 6 + 1); | |
3972 | if (!t) | |
3973 | return -ENOMEM; | |
3974 | ||
2b6bf07d ZJS |
3975 | fn = basename(path); |
3976 | k = fn - path; | |
5a3ab509 LP |
3977 | memcpy(t, path, k); |
3978 | t[k] = '.'; | |
3979 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
3980 | ||
3981 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
3982 | if (fd < 0) { | |
3983 | free(t); | |
3984 | return -errno; | |
3985 | } | |
3986 | ||
3987 | f = fdopen(fd, "we"); | |
3988 | if (!f) { | |
3989 | unlink(t); | |
3990 | free(t); | |
3991 | return -errno; | |
3992 | } | |
3993 | ||
3994 | *_f = f; | |
3995 | *_temp_path = t; | |
3996 | ||
3997 | return 0; | |
3998 | } | |
3999 | ||
6ea832a2 | 4000 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4001 | assert(fd >= 0); |
4002 | ||
6ea832a2 LP |
4003 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4004 | return -errno; | |
4005 | ||
4006 | return 0; | |
4007 | } | |
4008 | ||
4009 | int terminal_vhangup(const char *name) { | |
4010 | int fd, r; | |
4011 | ||
4012 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4013 | if (fd < 0) | |
4014 | return fd; | |
4015 | ||
4016 | r = terminal_vhangup_fd(fd); | |
4017 | close_nointr_nofail(fd); | |
4018 | ||
4019 | return r; | |
4020 | } | |
4021 | ||
4022 | int vt_disallocate(const char *name) { | |
4023 | int fd, r; | |
4024 | unsigned u; | |
6ea832a2 LP |
4025 | |
4026 | /* Deallocate the VT if possible. If not possible | |
4027 | * (i.e. because it is the active one), at least clear it | |
4028 | * entirely (including the scrollback buffer) */ | |
4029 | ||
b83bc4e9 LP |
4030 | if (!startswith(name, "/dev/")) |
4031 | return -EINVAL; | |
4032 | ||
4033 | if (!tty_is_vc(name)) { | |
4034 | /* So this is not a VT. I guess we cannot deallocate | |
4035 | * it then. But let's at least clear the screen */ | |
4036 | ||
4037 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4038 | if (fd < 0) | |
4039 | return fd; | |
4040 | ||
8585357a LP |
4041 | loop_write(fd, |
4042 | "\033[r" /* clear scrolling region */ | |
4043 | "\033[H" /* move home */ | |
4044 | "\033[2J", /* clear screen */ | |
4045 | 10, false); | |
b83bc4e9 LP |
4046 | close_nointr_nofail(fd); |
4047 | ||
4048 | return 0; | |
4049 | } | |
6ea832a2 LP |
4050 | |
4051 | if (!startswith(name, "/dev/tty")) | |
4052 | return -EINVAL; | |
4053 | ||
4054 | r = safe_atou(name+8, &u); | |
4055 | if (r < 0) | |
4056 | return r; | |
4057 | ||
4058 | if (u <= 0) | |
b83bc4e9 | 4059 | return -EINVAL; |
6ea832a2 | 4060 | |
b83bc4e9 | 4061 | /* Try to deallocate */ |
6ea832a2 LP |
4062 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4063 | if (fd < 0) | |
4064 | return fd; | |
4065 | ||
4066 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4067 | close_nointr_nofail(fd); |
6ea832a2 | 4068 | |
b83bc4e9 LP |
4069 | if (r >= 0) |
4070 | return 0; | |
6ea832a2 | 4071 | |
b83bc4e9 | 4072 | if (errno != EBUSY) |
6ea832a2 | 4073 | return -errno; |
6ea832a2 | 4074 | |
b83bc4e9 LP |
4075 | /* Couldn't deallocate, so let's clear it fully with |
4076 | * scrollback */ | |
4077 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4078 | if (fd < 0) |
b83bc4e9 | 4079 | return fd; |
6ea832a2 | 4080 | |
8585357a LP |
4081 | loop_write(fd, |
4082 | "\033[r" /* clear scrolling region */ | |
4083 | "\033[H" /* move home */ | |
4084 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4085 | 10, false); | |
b83bc4e9 | 4086 | close_nointr_nofail(fd); |
6ea832a2 | 4087 | |
b83bc4e9 | 4088 | return 0; |
6ea832a2 LP |
4089 | } |
4090 | ||
51045322 LP |
4091 | int copy_file(const char *from, const char *to, int flags) { |
4092 | _cleanup_close_ int fdf = -1; | |
4093 | int r, fdt; | |
34ca941c LP |
4094 | |
4095 | assert(from); | |
4096 | assert(to); | |
4097 | ||
4098 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4099 | if (fdf < 0) | |
4100 | return -errno; | |
4101 | ||
51045322 LP |
4102 | fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); |
4103 | if (fdt < 0) | |
34ca941c | 4104 | return -errno; |
34ca941c LP |
4105 | |
4106 | for (;;) { | |
4107 | char buf[PIPE_BUF]; | |
4108 | ssize_t n, k; | |
4109 | ||
4110 | n = read(fdf, buf, sizeof(buf)); | |
4111 | if (n < 0) { | |
4112 | r = -errno; | |
4113 | ||
34ca941c LP |
4114 | close_nointr(fdt); |
4115 | unlink(to); | |
4116 | ||
4117 | return r; | |
4118 | } | |
4119 | ||
4120 | if (n == 0) | |
4121 | break; | |
4122 | ||
4123 | errno = 0; | |
4124 | k = loop_write(fdt, buf, n, false); | |
4125 | if (n != k) { | |
4126 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4127 | ||
34ca941c | 4128 | close_nointr(fdt); |
34ca941c | 4129 | unlink(to); |
51045322 | 4130 | |
34ca941c LP |
4131 | return r; |
4132 | } | |
4133 | } | |
4134 | ||
34ca941c LP |
4135 | r = close_nointr(fdt); |
4136 | ||
4137 | if (r < 0) { | |
4138 | unlink(to); | |
4139 | return r; | |
4140 | } | |
4141 | ||
4142 | return 0; | |
4143 | } | |
4144 | ||
424a19f8 LP |
4145 | int symlink_atomic(const char *from, const char *to) { |
4146 | char *x; | |
4147 | _cleanup_free_ char *t; | |
34ca941c LP |
4148 | const char *fn; |
4149 | size_t k; | |
9bf3b535 | 4150 | uint64_t u; |
34ca941c LP |
4151 | unsigned i; |
4152 | int r; | |
4153 | ||
4154 | assert(from); | |
4155 | assert(to); | |
4156 | ||
4157 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4158 | if (!t) | |
4159 | return -ENOMEM; | |
4160 | ||
2b6bf07d | 4161 | fn = basename(to); |
34ca941c LP |
4162 | k = fn-to; |
4163 | memcpy(t, to, k); | |
4164 | t[k] = '.'; | |
4165 | x = stpcpy(t+k+1, fn); | |
4166 | ||
9bf3b535 | 4167 | u = random_u64(); |
34ca941c | 4168 | for (i = 0; i < 16; i++) { |
9bf3b535 LP |
4169 | *(x++) = hexchar(u & 0xF); |
4170 | u >>= 4; | |
34ca941c LP |
4171 | } |
4172 | ||
4173 | *x = 0; | |
4174 | ||
424a19f8 LP |
4175 | if (symlink(from, t) < 0) |
4176 | return -errno; | |
34ca941c LP |
4177 | |
4178 | if (rename(t, to) < 0) { | |
4179 | r = -errno; | |
4180 | unlink(t); | |
34ca941c LP |
4181 | return r; |
4182 | } | |
4183 | ||
424a19f8 | 4184 | return 0; |
34ca941c LP |
4185 | } |
4186 | ||
4d6d6518 LP |
4187 | bool display_is_local(const char *display) { |
4188 | assert(display); | |
4189 | ||
4190 | return | |
4191 | display[0] == ':' && | |
4192 | display[1] >= '0' && | |
4193 | display[1] <= '9'; | |
4194 | } | |
4195 | ||
4196 | int socket_from_display(const char *display, char **path) { | |
4197 | size_t k; | |
4198 | char *f, *c; | |
4199 | ||
4200 | assert(display); | |
4201 | assert(path); | |
4202 | ||
4203 | if (!display_is_local(display)) | |
4204 | return -EINVAL; | |
4205 | ||
4206 | k = strspn(display+1, "0123456789"); | |
4207 | ||
4208 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4209 | if (!f) | |
4210 | return -ENOMEM; | |
4211 | ||
4212 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4213 | memcpy(c, display+1, k); | |
4214 | c[k] = 0; | |
4215 | ||
4216 | *path = f; | |
4217 | ||
4218 | return 0; | |
4219 | } | |
4220 | ||
d05c5031 LP |
4221 | int get_user_creds( |
4222 | const char **username, | |
4223 | uid_t *uid, gid_t *gid, | |
4224 | const char **home, | |
4225 | const char **shell) { | |
4226 | ||
1cccf435 | 4227 | struct passwd *p; |
ddd88763 | 4228 | uid_t u; |
1cccf435 MV |
4229 | |
4230 | assert(username); | |
4231 | assert(*username); | |
1cccf435 MV |
4232 | |
4233 | /* We enforce some special rules for uid=0: in order to avoid | |
4234 | * NSS lookups for root we hardcode its data. */ | |
4235 | ||
4236 | if (streq(*username, "root") || streq(*username, "0")) { | |
4237 | *username = "root"; | |
4b67834e LP |
4238 | |
4239 | if (uid) | |
4240 | *uid = 0; | |
4241 | ||
4242 | if (gid) | |
4243 | *gid = 0; | |
4244 | ||
4245 | if (home) | |
4246 | *home = "/root"; | |
d05c5031 LP |
4247 | |
4248 | if (shell) | |
4249 | *shell = "/bin/sh"; | |
4250 | ||
1cccf435 MV |
4251 | return 0; |
4252 | } | |
4253 | ||
ddd88763 | 4254 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4255 | errno = 0; |
ddd88763 | 4256 | p = getpwuid(u); |
1cccf435 MV |
4257 | |
4258 | /* If there are multiple users with the same id, make | |
4259 | * sure to leave $USER to the configured value instead | |
4260 | * of the first occurrence in the database. However if | |
4261 | * the uid was configured by a numeric uid, then let's | |
4262 | * pick the real username from /etc/passwd. */ | |
4263 | if (p) | |
4264 | *username = p->pw_name; | |
4265 | } else { | |
4266 | errno = 0; | |
4267 | p = getpwnam(*username); | |
4268 | } | |
4269 | ||
4270 | if (!p) | |
8333c77e | 4271 | return errno > 0 ? -errno : -ESRCH; |
1cccf435 | 4272 | |
4b67834e LP |
4273 | if (uid) |
4274 | *uid = p->pw_uid; | |
4275 | ||
4276 | if (gid) | |
4277 | *gid = p->pw_gid; | |
4278 | ||
4279 | if (home) | |
4280 | *home = p->pw_dir; | |
4281 | ||
d05c5031 LP |
4282 | if (shell) |
4283 | *shell = p->pw_shell; | |
4284 | ||
4b67834e LP |
4285 | return 0; |
4286 | } | |
4287 | ||
59164be4 LP |
4288 | char* uid_to_name(uid_t uid) { |
4289 | struct passwd *p; | |
4290 | char *r; | |
4291 | ||
4292 | if (uid == 0) | |
4293 | return strdup("root"); | |
4294 | ||
4295 | p = getpwuid(uid); | |
4296 | if (p) | |
4297 | return strdup(p->pw_name); | |
4298 | ||
4299 | if (asprintf(&r, "%lu", (unsigned long) uid) < 0) | |
4300 | return NULL; | |
4301 | ||
4302 | return r; | |
4303 | } | |
4304 | ||
4468addc LP |
4305 | char* gid_to_name(gid_t gid) { |
4306 | struct group *p; | |
4307 | char *r; | |
4308 | ||
4309 | if (gid == 0) | |
4310 | return strdup("root"); | |
4311 | ||
4312 | p = getgrgid(gid); | |
4313 | if (p) | |
4314 | return strdup(p->gr_name); | |
4315 | ||
4316 | if (asprintf(&r, "%lu", (unsigned long) gid) < 0) | |
4317 | return NULL; | |
4318 | ||
4319 | return r; | |
4320 | } | |
4321 | ||
4b67834e LP |
4322 | int get_group_creds(const char **groupname, gid_t *gid) { |
4323 | struct group *g; | |
4324 | gid_t id; | |
4325 | ||
4326 | assert(groupname); | |
4327 | ||
4328 | /* We enforce some special rules for gid=0: in order to avoid | |
4329 | * NSS lookups for root we hardcode its data. */ | |
4330 | ||
4331 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4332 | *groupname = "root"; | |
4333 | ||
4334 | if (gid) | |
4335 | *gid = 0; | |
4336 | ||
4337 | return 0; | |
4338 | } | |
4339 | ||
4340 | if (parse_gid(*groupname, &id) >= 0) { | |
4341 | errno = 0; | |
4342 | g = getgrgid(id); | |
4343 | ||
4344 | if (g) | |
4345 | *groupname = g->gr_name; | |
4346 | } else { | |
4347 | errno = 0; | |
4348 | g = getgrnam(*groupname); | |
4349 | } | |
4350 | ||
4351 | if (!g) | |
8333c77e | 4352 | return errno > 0 ? -errno : -ESRCH; |
4b67834e LP |
4353 | |
4354 | if (gid) | |
4355 | *gid = g->gr_gid; | |
4356 | ||
1cccf435 MV |
4357 | return 0; |
4358 | } | |
4359 | ||
4468addc LP |
4360 | int in_gid(gid_t gid) { |
4361 | gid_t *gids; | |
43673799 LP |
4362 | int ngroups_max, r, i; |
4363 | ||
43673799 LP |
4364 | if (getgid() == gid) |
4365 | return 1; | |
4366 | ||
4367 | if (getegid() == gid) | |
4368 | return 1; | |
4369 | ||
4370 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4371 | assert(ngroups_max > 0); | |
4372 | ||
4373 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4374 | ||
4375 | r = getgroups(ngroups_max, gids); | |
4376 | if (r < 0) | |
4377 | return -errno; | |
4378 | ||
4379 | for (i = 0; i < r; i++) | |
4380 | if (gids[i] == gid) | |
4381 | return 1; | |
4382 | ||
4383 | return 0; | |
4384 | } | |
4385 | ||
4468addc LP |
4386 | int in_group(const char *name) { |
4387 | int r; | |
4388 | gid_t gid; | |
4389 | ||
4390 | r = get_group_creds(&name, &gid); | |
4391 | if (r < 0) | |
4392 | return r; | |
4393 | ||
4394 | return in_gid(gid); | |
4395 | } | |
4396 | ||
8092a428 | 4397 | int glob_exists(const char *path) { |
7fd1b19b | 4398 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 4399 | int k; |
8092a428 LP |
4400 | |
4401 | assert(path); | |
4402 | ||
8092a428 LP |
4403 | errno = 0; |
4404 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4405 | ||
4406 | if (k == GLOB_NOMATCH) | |
8d98da3f | 4407 | return 0; |
8092a428 | 4408 | else if (k == GLOB_NOSPACE) |
8d98da3f | 4409 | return -ENOMEM; |
8092a428 | 4410 | else if (k == 0) |
8d98da3f | 4411 | return !strv_isempty(g.gl_pathv); |
8092a428 | 4412 | else |
8d98da3f ZJS |
4413 | return errno ? -errno : -EIO; |
4414 | } | |
8092a428 | 4415 | |
8d98da3f ZJS |
4416 | int glob_extend(char ***strv, const char *path) { |
4417 | _cleanup_globfree_ glob_t g = {}; | |
4418 | int k; | |
4419 | char **p; | |
4420 | ||
4421 | errno = 0; | |
a8ccacf5 | 4422 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
4423 | |
4424 | if (k == GLOB_NOMATCH) | |
4425 | return -ENOENT; | |
4426 | else if (k == GLOB_NOSPACE) | |
4427 | return -ENOMEM; | |
4428 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
4429 | return errno ? -errno : -EIO; | |
4430 | ||
4431 | STRV_FOREACH(p, g.gl_pathv) { | |
4432 | k = strv_extend(strv, *p); | |
4433 | if (k < 0) | |
4434 | break; | |
4435 | } | |
4436 | ||
4437 | return k; | |
8092a428 LP |
4438 | } |
4439 | ||
83096483 LP |
4440 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4441 | struct stat st; | |
4442 | ||
4443 | assert(d); | |
4444 | assert(de); | |
4445 | ||
4446 | if (de->d_type != DT_UNKNOWN) | |
4447 | return 0; | |
4448 | ||
4449 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4450 | return -errno; | |
4451 | ||
4452 | de->d_type = | |
4453 | S_ISREG(st.st_mode) ? DT_REG : | |
4454 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4455 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4456 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4457 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4458 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4459 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4460 | DT_UNKNOWN; | |
4461 | ||
4462 | return 0; | |
4463 | } | |
4464 | ||
4465 | int in_search_path(const char *path, char **search) { | |
893fa014 ZJS |
4466 | char **i; |
4467 | _cleanup_free_ char *parent = NULL; | |
83096483 LP |
4468 | int r; |
4469 | ||
9eb977db | 4470 | r = path_get_parent(path, &parent); |
83096483 LP |
4471 | if (r < 0) |
4472 | return r; | |
4473 | ||
893fa014 ZJS |
4474 | STRV_FOREACH(i, search) |
4475 | if (path_equal(parent, *i)) | |
4476 | return 1; | |
83096483 | 4477 | |
893fa014 | 4478 | return 0; |
83096483 LP |
4479 | } |
4480 | ||
034a2a52 | 4481 | int get_files_in_directory(const char *path, char ***list) { |
893fa014 ZJS |
4482 | _cleanup_closedir_ DIR *d = NULL; |
4483 | size_t bufsize = 0, n = 0; | |
4484 | _cleanup_strv_free_ char **l = NULL; | |
034a2a52 LP |
4485 | |
4486 | assert(path); | |
d60ef526 LP |
4487 | |
4488 | /* Returns all files in a directory in *list, and the number | |
4489 | * of files as return value. If list is NULL returns only the | |
893fa014 | 4490 | * number. */ |
034a2a52 LP |
4491 | |
4492 | d = opendir(path); | |
8ea913b2 LP |
4493 | if (!d) |
4494 | return -errno; | |
4495 | ||
034a2a52 | 4496 | for (;;) { |
7d5e9c0f | 4497 | struct dirent *de; |
034a2a52 | 4498 | |
3fd11280 FW |
4499 | errno = 0; |
4500 | de = readdir(d); | |
4501 | if (!de && errno != 0) | |
4502 | return -errno; | |
034a2a52 LP |
4503 | if (!de) |
4504 | break; | |
4505 | ||
4506 | dirent_ensure_type(d, de); | |
4507 | ||
4508 | if (!dirent_is_file(de)) | |
4509 | continue; | |
4510 | ||
d60ef526 | 4511 | if (list) { |
893fa014 ZJS |
4512 | /* one extra slot is needed for the terminating NULL */ |
4513 | if (!GREEDY_REALLOC(l, bufsize, n + 2)) | |
4514 | return -ENOMEM; | |
034a2a52 | 4515 | |
893fa014 ZJS |
4516 | l[n] = strdup(de->d_name); |
4517 | if (!l[n]) | |
4518 | return -ENOMEM; | |
034a2a52 | 4519 | |
893fa014 | 4520 | l[++n] = NULL; |
d60ef526 | 4521 | } else |
893fa014 | 4522 | n++; |
034a2a52 LP |
4523 | } |
4524 | ||
893fa014 ZJS |
4525 | if (list) { |
4526 | *list = l; | |
4527 | l = NULL; /* avoid freeing */ | |
4528 | } | |
034a2a52 | 4529 | |
893fa014 | 4530 | return n; |
034a2a52 LP |
4531 | } |
4532 | ||
b7def684 | 4533 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4534 | va_list ap; |
4535 | size_t l; | |
4536 | char *r, *p; | |
4537 | ||
4538 | va_start(ap, x); | |
4539 | ||
4540 | if (x) { | |
4541 | l = strlen(x); | |
4542 | ||
4543 | for (;;) { | |
4544 | const char *t; | |
040f18ea | 4545 | size_t n; |
911a4828 LP |
4546 | |
4547 | t = va_arg(ap, const char *); | |
4548 | if (!t) | |
4549 | break; | |
4550 | ||
040f18ea | 4551 | n = strlen(t); |
e98055de LN |
4552 | if (n > ((size_t) -1) - l) { |
4553 | va_end(ap); | |
040f18ea | 4554 | return NULL; |
e98055de | 4555 | } |
040f18ea LP |
4556 | |
4557 | l += n; | |
911a4828 LP |
4558 | } |
4559 | } else | |
4560 | l = 0; | |
4561 | ||
4562 | va_end(ap); | |
4563 | ||
4564 | r = new(char, l+1); | |
4565 | if (!r) | |
4566 | return NULL; | |
4567 | ||
4568 | if (x) { | |
4569 | p = stpcpy(r, x); | |
4570 | ||
4571 | va_start(ap, x); | |
4572 | ||
4573 | for (;;) { | |
4574 | const char *t; | |
4575 | ||
4576 | t = va_arg(ap, const char *); | |
4577 | if (!t) | |
4578 | break; | |
4579 | ||
4580 | p = stpcpy(p, t); | |
4581 | } | |
8ea913b2 LP |
4582 | |
4583 | va_end(ap); | |
911a4828 LP |
4584 | } else |
4585 | r[0] = 0; | |
4586 | ||
4587 | return r; | |
4588 | } | |
4589 | ||
b636465b | 4590 | bool is_main_thread(void) { |
ec202eae | 4591 | static thread_local int cached = 0; |
b636465b LP |
4592 | |
4593 | if (_unlikely_(cached == 0)) | |
4594 | cached = getpid() == gettid() ? 1 : -1; | |
4595 | ||
4596 | return cached > 0; | |
4597 | } | |
4598 | ||
94959f0f LP |
4599 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4600 | char *p, *s; | |
4601 | int r; | |
4602 | unsigned n, m; | |
4603 | ||
4604 | assert(ret); | |
4605 | ||
4606 | /* If it has a queue this is good enough for us */ | |
4607 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4608 | return -ENOMEM; | |
4609 | ||
4610 | r = access(p, F_OK); | |
4611 | free(p); | |
4612 | ||
4613 | if (r >= 0) { | |
4614 | *ret = d; | |
4615 | return 0; | |
4616 | } | |
4617 | ||
4618 | /* If it is a partition find the originating device */ | |
4619 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4620 | return -ENOMEM; | |
4621 | ||
4622 | r = access(p, F_OK); | |
4623 | free(p); | |
4624 | ||
4625 | if (r < 0) | |
4626 | return -ENOENT; | |
4627 | ||
4628 | /* Get parent dev_t */ | |
4629 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4630 | return -ENOMEM; | |
4631 | ||
4632 | r = read_one_line_file(p, &s); | |
4633 | free(p); | |
4634 | ||
4635 | if (r < 0) | |
4636 | return r; | |
4637 | ||
4638 | r = sscanf(s, "%u:%u", &m, &n); | |
4639 | free(s); | |
4640 | ||
4641 | if (r != 2) | |
4642 | return -EINVAL; | |
4643 | ||
4644 | /* Only return this if it is really good enough for us. */ | |
4645 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4646 | return -ENOMEM; | |
4647 | ||
4648 | r = access(p, F_OK); | |
4649 | free(p); | |
4650 | ||
4651 | if (r >= 0) { | |
4652 | *ret = makedev(m, n); | |
4653 | return 0; | |
4654 | } | |
4655 | ||
4656 | return -ENOENT; | |
4657 | } | |
4658 | ||
8d53b453 | 4659 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4660 | struct stat st; |
4661 | ||
4662 | assert(p); | |
4663 | ||
4664 | if (lstat(p, &st) < 0) | |
4665 | return -errno; | |
4666 | ||
4667 | return | |
8d53b453 | 4668 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4669 | (st.st_mode & S_ISVTX); |
4670 | } | |
94959f0f | 4671 | |
f41607a6 LP |
4672 | static const char *const ioprio_class_table[] = { |
4673 | [IOPRIO_CLASS_NONE] = "none", | |
4674 | [IOPRIO_CLASS_RT] = "realtime", | |
4675 | [IOPRIO_CLASS_BE] = "best-effort", | |
4676 | [IOPRIO_CLASS_IDLE] = "idle" | |
4677 | }; | |
4678 | ||
f8b69d1d | 4679 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4680 | |
4681 | static const char *const sigchld_code_table[] = { | |
4682 | [CLD_EXITED] = "exited", | |
4683 | [CLD_KILLED] = "killed", | |
4684 | [CLD_DUMPED] = "dumped", | |
4685 | [CLD_TRAPPED] = "trapped", | |
4686 | [CLD_STOPPED] = "stopped", | |
4687 | [CLD_CONTINUED] = "continued", | |
4688 | }; | |
4689 | ||
4690 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4691 | ||
4692 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4693 | [LOG_FAC(LOG_KERN)] = "kern", | |
4694 | [LOG_FAC(LOG_USER)] = "user", | |
4695 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4696 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4697 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4698 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4699 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4700 | [LOG_FAC(LOG_NEWS)] = "news", | |
4701 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4702 | [LOG_FAC(LOG_CRON)] = "cron", | |
4703 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4704 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4705 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4706 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4707 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4708 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4709 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4710 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4711 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4712 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4713 | }; | |
4714 | ||
f8b69d1d | 4715 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4716 | |
4717 | static const char *const log_level_table[] = { | |
4718 | [LOG_EMERG] = "emerg", | |
4719 | [LOG_ALERT] = "alert", | |
4720 | [LOG_CRIT] = "crit", | |
4721 | [LOG_ERR] = "err", | |
4722 | [LOG_WARNING] = "warning", | |
4723 | [LOG_NOTICE] = "notice", | |
4724 | [LOG_INFO] = "info", | |
4725 | [LOG_DEBUG] = "debug" | |
4726 | }; | |
4727 | ||
f8b69d1d | 4728 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4729 | |
4730 | static const char* const sched_policy_table[] = { | |
4731 | [SCHED_OTHER] = "other", | |
4732 | [SCHED_BATCH] = "batch", | |
4733 | [SCHED_IDLE] = "idle", | |
4734 | [SCHED_FIFO] = "fifo", | |
4735 | [SCHED_RR] = "rr" | |
4736 | }; | |
4737 | ||
f8b69d1d | 4738 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 LP |
4739 | |
4740 | static const char* const rlimit_table[] = { | |
4741 | [RLIMIT_CPU] = "LimitCPU", | |
4742 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4743 | [RLIMIT_DATA] = "LimitDATA", | |
4744 | [RLIMIT_STACK] = "LimitSTACK", | |
4745 | [RLIMIT_CORE] = "LimitCORE", | |
4746 | [RLIMIT_RSS] = "LimitRSS", | |
4747 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4748 | [RLIMIT_AS] = "LimitAS", | |
4749 | [RLIMIT_NPROC] = "LimitNPROC", | |
4750 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4751 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4752 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4753 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4754 | [RLIMIT_NICE] = "LimitNICE", | |
4755 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4756 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4757 | }; | |
4758 | ||
4759 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4760 | ||
4761 | static const char* const ip_tos_table[] = { | |
4762 | [IPTOS_LOWDELAY] = "low-delay", | |
4763 | [IPTOS_THROUGHPUT] = "throughput", | |
4764 | [IPTOS_RELIABILITY] = "reliability", | |
4765 | [IPTOS_LOWCOST] = "low-cost", | |
4766 | }; | |
4767 | ||
f8b69d1d | 4768 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4769 | |
4e240ab0 | 4770 | static const char *const __signal_table[] = { |
f41607a6 LP |
4771 | [SIGHUP] = "HUP", |
4772 | [SIGINT] = "INT", | |
4773 | [SIGQUIT] = "QUIT", | |
4774 | [SIGILL] = "ILL", | |
4775 | [SIGTRAP] = "TRAP", | |
4776 | [SIGABRT] = "ABRT", | |
4777 | [SIGBUS] = "BUS", | |
4778 | [SIGFPE] = "FPE", | |
4779 | [SIGKILL] = "KILL", | |
4780 | [SIGUSR1] = "USR1", | |
4781 | [SIGSEGV] = "SEGV", | |
4782 | [SIGUSR2] = "USR2", | |
4783 | [SIGPIPE] = "PIPE", | |
4784 | [SIGALRM] = "ALRM", | |
4785 | [SIGTERM] = "TERM", | |
4786 | #ifdef SIGSTKFLT | |
4787 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4788 | #endif | |
4789 | [SIGCHLD] = "CHLD", | |
4790 | [SIGCONT] = "CONT", | |
4791 | [SIGSTOP] = "STOP", | |
4792 | [SIGTSTP] = "TSTP", | |
4793 | [SIGTTIN] = "TTIN", | |
4794 | [SIGTTOU] = "TTOU", | |
4795 | [SIGURG] = "URG", | |
4796 | [SIGXCPU] = "XCPU", | |
4797 | [SIGXFSZ] = "XFSZ", | |
4798 | [SIGVTALRM] = "VTALRM", | |
4799 | [SIGPROF] = "PROF", | |
4800 | [SIGWINCH] = "WINCH", | |
4801 | [SIGIO] = "IO", | |
4802 | [SIGPWR] = "PWR", | |
4803 | [SIGSYS] = "SYS" | |
4804 | }; | |
4805 | ||
4e240ab0 MS |
4806 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4807 | ||
4808 | const char *signal_to_string(int signo) { | |
ec202eae | 4809 | static thread_local char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1]; |
4e240ab0 MS |
4810 | const char *name; |
4811 | ||
4812 | name = __signal_to_string(signo); | |
4813 | if (name) | |
4814 | return name; | |
4815 | ||
4816 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
fa70beaa | 4817 | snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN); |
4e240ab0 | 4818 | else |
fa70beaa LP |
4819 | snprintf(buf, sizeof(buf), "%d", signo); |
4820 | ||
4e240ab0 MS |
4821 | return buf; |
4822 | } | |
4823 | ||
4824 | int signal_from_string(const char *s) { | |
4825 | int signo; | |
4826 | int offset = 0; | |
4827 | unsigned u; | |
4828 | ||
040f18ea | 4829 | signo = __signal_from_string(s); |
4e240ab0 MS |
4830 | if (signo > 0) |
4831 | return signo; | |
4832 | ||
4833 | if (startswith(s, "RTMIN+")) { | |
4834 | s += 6; | |
4835 | offset = SIGRTMIN; | |
4836 | } | |
4837 | if (safe_atou(s, &u) >= 0) { | |
4838 | signo = (int) u + offset; | |
4839 | if (signo > 0 && signo < _NSIG) | |
4840 | return signo; | |
4841 | } | |
4842 | return -1; | |
4843 | } | |
65457142 FC |
4844 | |
4845 | bool kexec_loaded(void) { | |
4846 | bool loaded = false; | |
4847 | char *s; | |
4848 | ||
4849 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
4850 | if (s[0] == '1') | |
4851 | loaded = true; | |
4852 | free(s); | |
4853 | } | |
4854 | return loaded; | |
4855 | } | |
fb9de93d LP |
4856 | |
4857 | int strdup_or_null(const char *a, char **b) { | |
4858 | char *c; | |
4859 | ||
4860 | assert(b); | |
4861 | ||
4862 | if (!a) { | |
4863 | *b = NULL; | |
4864 | return 0; | |
4865 | } | |
4866 | ||
4867 | c = strdup(a); | |
4868 | if (!c) | |
4869 | return -ENOMEM; | |
4870 | ||
4871 | *b = c; | |
4872 | return 0; | |
4873 | } | |
64685e0c | 4874 | |
87d2c1ff LP |
4875 | int prot_from_flags(int flags) { |
4876 | ||
4877 | switch (flags & O_ACCMODE) { | |
4878 | ||
4879 | case O_RDONLY: | |
4880 | return PROT_READ; | |
4881 | ||
4882 | case O_WRONLY: | |
4883 | return PROT_WRITE; | |
4884 | ||
4885 | case O_RDWR: | |
4886 | return PROT_READ|PROT_WRITE; | |
4887 | ||
4888 | default: | |
4889 | return -EINVAL; | |
4890 | } | |
7c99e0c1 | 4891 | } |
689b9a22 | 4892 | |
babfc091 | 4893 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 4894 | unsigned i; |
babfc091 LP |
4895 | |
4896 | static const struct { | |
4897 | const char *suffix; | |
4898 | off_t factor; | |
4899 | } table[] = { | |
32895bb3 LP |
4900 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
4901 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
4902 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
4903 | { "G", 1024ULL*1024ULL*1024ULL }, | |
4904 | { "M", 1024ULL*1024ULL }, | |
4905 | { "K", 1024ULL }, | |
4906 | }; | |
4907 | ||
4908 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
4909 | ||
4910 | if (t >= table[i].factor) { | |
4911 | snprintf(buf, l, | |
4912 | "%llu.%llu%s", | |
4913 | (unsigned long long) (t / table[i].factor), | |
4914 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
4915 | table[i].suffix); | |
4916 | ||
4917 | goto finish; | |
4918 | } | |
4919 | } | |
4920 | ||
4921 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
4922 | ||
4923 | finish: | |
4924 | buf[l-1] = 0; | |
4925 | return buf; | |
4926 | ||
4927 | } | |
55d7bfc1 LP |
4928 | |
4929 | void* memdup(const void *p, size_t l) { | |
4930 | void *r; | |
4931 | ||
4932 | assert(p); | |
4933 | ||
4934 | r = malloc(l); | |
4935 | if (!r) | |
4936 | return NULL; | |
4937 | ||
4938 | memcpy(r, p, l); | |
4939 | return r; | |
4940 | } | |
bb99a35a LP |
4941 | |
4942 | int fd_inc_sndbuf(int fd, size_t n) { | |
4943 | int r, value; | |
4944 | socklen_t l = sizeof(value); | |
4945 | ||
4946 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
92d75ca4 | 4947 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
4948 | return 0; |
4949 | ||
92d75ca4 LP |
4950 | /* If we have the privileges we will ignore the kernel limit. */ |
4951 | ||
bb99a35a | 4952 | value = (int) n; |
92d75ca4 LP |
4953 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) |
4954 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) | |
4955 | return -errno; | |
bb99a35a LP |
4956 | |
4957 | return 1; | |
4958 | } | |
4959 | ||
4960 | int fd_inc_rcvbuf(int fd, size_t n) { | |
4961 | int r, value; | |
4962 | socklen_t l = sizeof(value); | |
4963 | ||
4964 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
92d75ca4 | 4965 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
4966 | return 0; |
4967 | ||
92d75ca4 | 4968 | /* If we have the privileges we will ignore the kernel limit. */ |
bb99a35a | 4969 | |
92d75ca4 LP |
4970 | value = (int) n; |
4971 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) | |
4972 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) | |
4973 | return -errno; | |
bb99a35a LP |
4974 | return 1; |
4975 | } | |
6bb92a16 | 4976 | |
9bdc770c | 4977 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
4978 | pid_t parent_pid, agent_pid; |
4979 | int fd; | |
4980 | bool stdout_is_tty, stderr_is_tty; | |
4981 | unsigned n, i; | |
4982 | va_list ap; | |
4983 | char **l; | |
4984 | ||
4985 | assert(pid); | |
4986 | assert(path); | |
4987 | ||
4988 | parent_pid = getpid(); | |
4989 | ||
4990 | /* Spawns a temporary TTY agent, making sure it goes away when | |
4991 | * we go away */ | |
4992 | ||
4993 | agent_pid = fork(); | |
4994 | if (agent_pid < 0) | |
4995 | return -errno; | |
4996 | ||
4997 | if (agent_pid != 0) { | |
4998 | *pid = agent_pid; | |
4999 | return 0; | |
5000 | } | |
5001 | ||
5002 | /* In the child: | |
5003 | * | |
5004 | * Make sure the agent goes away when the parent dies */ | |
5005 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5006 | _exit(EXIT_FAILURE); | |
5007 | ||
5008 | /* Check whether our parent died before we were able | |
5009 | * to set the death signal */ | |
5010 | if (getppid() != parent_pid) | |
5011 | _exit(EXIT_SUCCESS); | |
5012 | ||
5013 | /* Don't leak fds to the agent */ | |
9bdc770c | 5014 | close_all_fds(except, n_except); |
6bb92a16 LP |
5015 | |
5016 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5017 | stderr_is_tty = isatty(STDERR_FILENO); | |
5018 | ||
5019 | if (!stdout_is_tty || !stderr_is_tty) { | |
5020 | /* Detach from stdout/stderr. and reopen | |
5021 | * /dev/tty for them. This is important to | |
5022 | * ensure that when systemctl is started via | |
5023 | * popen() or a similar call that expects to | |
5024 | * read EOF we actually do generate EOF and | |
5025 | * not delay this indefinitely by because we | |
5026 | * keep an unused copy of stdin around. */ | |
5027 | fd = open("/dev/tty", O_WRONLY); | |
5028 | if (fd < 0) { | |
5029 | log_error("Failed to open /dev/tty: %m"); | |
5030 | _exit(EXIT_FAILURE); | |
5031 | } | |
5032 | ||
5033 | if (!stdout_is_tty) | |
5034 | dup2(fd, STDOUT_FILENO); | |
5035 | ||
5036 | if (!stderr_is_tty) | |
5037 | dup2(fd, STDERR_FILENO); | |
5038 | ||
5039 | if (fd > 2) | |
5040 | close(fd); | |
5041 | } | |
5042 | ||
5043 | /* Count arguments */ | |
5044 | va_start(ap, path); | |
5045 | for (n = 0; va_arg(ap, char*); n++) | |
5046 | ; | |
5047 | va_end(ap); | |
5048 | ||
5049 | /* Allocate strv */ | |
5050 | l = alloca(sizeof(char *) * (n + 1)); | |
5051 | ||
5052 | /* Fill in arguments */ | |
5053 | va_start(ap, path); | |
5054 | for (i = 0; i <= n; i++) | |
5055 | l[i] = va_arg(ap, char*); | |
5056 | va_end(ap); | |
5057 | ||
5058 | execv(path, l); | |
5059 | _exit(EXIT_FAILURE); | |
5060 | } | |
68faf98c LP |
5061 | |
5062 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5063 | struct rlimit highest, fixed; | |
5064 | ||
5065 | assert(rlim); | |
5066 | ||
5067 | if (setrlimit(resource, rlim) >= 0) | |
5068 | return 0; | |
5069 | ||
5070 | if (errno != EPERM) | |
5071 | return -errno; | |
5072 | ||
5073 | /* So we failed to set the desired setrlimit, then let's try | |
5074 | * to get as close as we can */ | |
5075 | assert_se(getrlimit(resource, &highest) == 0); | |
5076 | ||
5077 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5078 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5079 | ||
5080 | if (setrlimit(resource, &fixed) < 0) | |
5081 | return -errno; | |
5082 | ||
5083 | return 0; | |
5084 | } | |
3d9a4122 | 5085 | |
ab94af92 | 5086 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
49aa47c7 LP |
5087 | _cleanup_fclose_ FILE *f = NULL; |
5088 | char *value = NULL; | |
ab94af92 | 5089 | int r; |
ab94af92 LP |
5090 | bool done = false; |
5091 | size_t l; | |
49aa47c7 | 5092 | const char *path; |
ab94af92 | 5093 | |
49aa47c7 | 5094 | assert(pid >= 0); |
ab94af92 LP |
5095 | assert(field); |
5096 | assert(_value); | |
5097 | ||
5098 | if (pid == 0) | |
49aa47c7 LP |
5099 | path = "/proc/self/environ"; |
5100 | else | |
5101 | path = procfs_file_alloca(pid, "environ"); | |
ab94af92 LP |
5102 | |
5103 | f = fopen(path, "re"); | |
5104 | if (!f) | |
5105 | return -errno; | |
5106 | ||
5107 | l = strlen(field); | |
5108 | r = 0; | |
5109 | ||
5110 | do { | |
5111 | char line[LINE_MAX]; | |
5112 | unsigned i; | |
5113 | ||
5114 | for (i = 0; i < sizeof(line)-1; i++) { | |
5115 | int c; | |
5116 | ||
5117 | c = getc(f); | |
5118 | if (_unlikely_(c == EOF)) { | |
5119 | done = true; | |
5120 | break; | |
5121 | } else if (c == 0) | |
5122 | break; | |
5123 | ||
5124 | line[i] = c; | |
5125 | } | |
5126 | line[i] = 0; | |
5127 | ||
5128 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5129 | value = strdup(line + l + 1); | |
49aa47c7 LP |
5130 | if (!value) |
5131 | return -ENOMEM; | |
ab94af92 LP |
5132 | |
5133 | r = 1; | |
5134 | break; | |
5135 | } | |
5136 | ||
5137 | } while (!done); | |
5138 | ||
49aa47c7 | 5139 | *_value = value; |
ab94af92 LP |
5140 | return r; |
5141 | } | |
d889a206 | 5142 | |
49dbfa7b LP |
5143 | bool is_valid_documentation_url(const char *url) { |
5144 | assert(url); | |
5145 | ||
5146 | if (startswith(url, "http://") && url[7]) | |
5147 | return true; | |
5148 | ||
5149 | if (startswith(url, "https://") && url[8]) | |
5150 | return true; | |
5151 | ||
5152 | if (startswith(url, "file:") && url[5]) | |
5153 | return true; | |
5154 | ||
5155 | if (startswith(url, "info:") && url[5]) | |
5156 | return true; | |
5157 | ||
5158 | if (startswith(url, "man:") && url[4]) | |
5159 | return true; | |
5160 | ||
5161 | return false; | |
5162 | } | |
9be346c9 HH |
5163 | |
5164 | bool in_initrd(void) { | |
73020ab2 | 5165 | static int saved = -1; |
825c6fe5 | 5166 | struct statfs s; |
8f33b5b8 | 5167 | |
825c6fe5 LP |
5168 | if (saved >= 0) |
5169 | return saved; | |
5170 | ||
5171 | /* We make two checks here: | |
5172 | * | |
5173 | * 1. the flag file /etc/initrd-release must exist | |
5174 | * 2. the root file system must be a memory file system | |
5175 | * | |
5176 | * The second check is extra paranoia, since misdetecting an | |
5177 | * initrd can have bad bad consequences due the initrd | |
5178 | * emptying when transititioning to the main systemd. | |
5179 | */ | |
5180 | ||
5181 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5182 | statfs("/", &s) >= 0 && | |
943aad8c | 5183 | is_temporary_fs(&s); |
9be346c9 | 5184 | |
8f33b5b8 | 5185 | return saved; |
9be346c9 | 5186 | } |
069cfc85 LP |
5187 | |
5188 | void warn_melody(void) { | |
e67f47e5 | 5189 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5190 | |
5191 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5192 | if (fd < 0) | |
5193 | return; | |
5194 | ||
040f18ea | 5195 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5196 | |
5197 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5198 | usleep(125*USEC_PER_MSEC); | |
5199 | ||
5200 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5201 | usleep(125*USEC_PER_MSEC); | |
5202 | ||
5203 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5204 | usleep(125*USEC_PER_MSEC); | |
5205 | ||
5206 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5207 | } |
cd3bd60a LP |
5208 | |
5209 | int make_console_stdio(void) { | |
5210 | int fd, r; | |
5211 | ||
5212 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5213 | ||
5214 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5215 | if (fd < 0) { | |
5216 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5217 | return fd; | |
5218 | } | |
5219 | ||
5220 | r = make_stdio(fd); | |
5221 | if (r < 0) { | |
5222 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5223 | return r; | |
5224 | } | |
5225 | ||
5226 | return 0; | |
5227 | } | |
7c5f152a LP |
5228 | |
5229 | int get_home_dir(char **_h) { | |
2cfbd749 | 5230 | struct passwd *p; |
7c5f152a | 5231 | const char *e; |
2cfbd749 | 5232 | char *h; |
7c5f152a | 5233 | uid_t u; |
7c5f152a LP |
5234 | |
5235 | assert(_h); | |
5236 | ||
5237 | /* Take the user specified one */ | |
5238 | e = getenv("HOME"); | |
5239 | if (e) { | |
5240 | h = strdup(e); | |
5241 | if (!h) | |
5242 | return -ENOMEM; | |
5243 | ||
5244 | *_h = h; | |
5245 | return 0; | |
5246 | } | |
5247 | ||
5248 | /* Hardcode home directory for root to avoid NSS */ | |
5249 | u = getuid(); | |
5250 | if (u == 0) { | |
5251 | h = strdup("/root"); | |
5252 | if (!h) | |
5253 | return -ENOMEM; | |
5254 | ||
5255 | *_h = h; | |
5256 | return 0; | |
5257 | } | |
5258 | ||
5259 | /* Check the database... */ | |
5260 | errno = 0; | |
5261 | p = getpwuid(u); | |
5262 | if (!p) | |
bcb161b0 | 5263 | return errno > 0 ? -errno : -ESRCH; |
7c5f152a LP |
5264 | |
5265 | if (!path_is_absolute(p->pw_dir)) | |
5266 | return -EINVAL; | |
5267 | ||
5268 | h = strdup(p->pw_dir); | |
5269 | if (!h) | |
5270 | return -ENOMEM; | |
5271 | ||
5272 | *_h = h; | |
5273 | return 0; | |
5274 | } | |
5275 | ||
2cfbd749 LP |
5276 | int get_shell(char **_s) { |
5277 | struct passwd *p; | |
5278 | const char *e; | |
5279 | char *s; | |
5280 | uid_t u; | |
5281 | ||
5282 | assert(_s); | |
5283 | ||
5284 | /* Take the user specified one */ | |
5285 | e = getenv("SHELL"); | |
5286 | if (e) { | |
5287 | s = strdup(e); | |
5288 | if (!s) | |
5289 | return -ENOMEM; | |
5290 | ||
5291 | *_s = s; | |
5292 | return 0; | |
5293 | } | |
5294 | ||
5295 | /* Hardcode home directory for root to avoid NSS */ | |
5296 | u = getuid(); | |
5297 | if (u == 0) { | |
5298 | s = strdup("/bin/sh"); | |
5299 | if (!s) | |
5300 | return -ENOMEM; | |
5301 | ||
5302 | *_s = s; | |
5303 | return 0; | |
5304 | } | |
5305 | ||
5306 | /* Check the database... */ | |
5307 | errno = 0; | |
5308 | p = getpwuid(u); | |
5309 | if (!p) | |
5310 | return errno > 0 ? -errno : -ESRCH; | |
5311 | ||
5312 | if (!path_is_absolute(p->pw_shell)) | |
5313 | return -EINVAL; | |
5314 | ||
5315 | s = strdup(p->pw_shell); | |
5316 | if (!s) | |
5317 | return -ENOMEM; | |
5318 | ||
5319 | *_s = s; | |
5320 | return 0; | |
5321 | } | |
5322 | ||
0b507b17 LP |
5323 | bool filename_is_safe(const char *p) { |
5324 | ||
5325 | if (isempty(p)) | |
5326 | return false; | |
5327 | ||
5328 | if (strchr(p, '/')) | |
5329 | return false; | |
5330 | ||
5331 | if (streq(p, ".")) | |
5332 | return false; | |
5333 | ||
5334 | if (streq(p, "..")) | |
5335 | return false; | |
5336 | ||
5337 | if (strlen(p) > FILENAME_MAX) | |
5338 | return false; | |
5339 | ||
5340 | return true; | |
5341 | } | |
5342 | ||
5343 | bool string_is_safe(const char *p) { | |
5344 | const char *t; | |
5345 | ||
5346 | assert(p); | |
5347 | ||
5348 | for (t = p; *t; t++) { | |
01539d6e | 5349 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5350 | return false; |
5351 | ||
011afa76 | 5352 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5353 | return false; |
5354 | } | |
5355 | ||
5356 | return true; | |
5357 | } | |
cfbc22ab | 5358 | |
ac4c8d6d ZJS |
5359 | /** |
5360 | * Check if a string contains control characters. | |
5361 | * Spaces and tabs are not considered control characters. | |
5362 | */ | |
4d1a6904 LP |
5363 | bool string_has_cc(const char *p) { |
5364 | const char *t; | |
5365 | ||
5366 | assert(p); | |
5367 | ||
5368 | for (t = p; *t; t++) | |
da2620a5 | 5369 | if (*t > 0 && *t < ' ' && *t != '\t') |
4d1a6904 LP |
5370 | return true; |
5371 | ||
5372 | return false; | |
5373 | } | |
5374 | ||
e884315e LP |
5375 | bool path_is_safe(const char *p) { |
5376 | ||
5377 | if (isempty(p)) | |
5378 | return false; | |
5379 | ||
5380 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5381 | return false; | |
5382 | ||
5383 | if (strlen(p) > PATH_MAX) | |
5384 | return false; | |
5385 | ||
5386 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5387 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5388 | return false; | |
5389 | ||
5390 | if (strstr(p, "//")) | |
5391 | return false; | |
5392 | ||
5393 | return true; | |
5394 | } | |
5395 | ||
a9e12476 KS |
5396 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5397 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5398 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5399 | size_t l, u, idx; |
5400 | const void *p; | |
5401 | int comparison; | |
5402 | ||
5403 | l = 0; | |
5404 | u = nmemb; | |
5405 | while (l < u) { | |
5406 | idx = (l + u) / 2; | |
5407 | p = (void *)(((const char *) base) + (idx * size)); | |
5408 | comparison = compar(key, p, arg); | |
5409 | if (comparison < 0) | |
5410 | u = idx; | |
5411 | else if (comparison > 0) | |
5412 | l = idx + 1; | |
5413 | else | |
5414 | return (void *)p; | |
5415 | } | |
5416 | return NULL; | |
5417 | } | |
09017585 MS |
5418 | |
5419 | bool is_locale_utf8(void) { | |
5420 | const char *set; | |
5421 | static int cached_answer = -1; | |
5422 | ||
5423 | if (cached_answer >= 0) | |
5424 | goto out; | |
5425 | ||
5426 | if (!setlocale(LC_ALL, "")) { | |
5427 | cached_answer = true; | |
5428 | goto out; | |
5429 | } | |
5430 | ||
5431 | set = nl_langinfo(CODESET); | |
5432 | if (!set) { | |
5433 | cached_answer = true; | |
5434 | goto out; | |
5435 | } | |
5436 | ||
f168c273 | 5437 | if (streq(set, "UTF-8")) { |
fee79e01 HH |
5438 | cached_answer = true; |
5439 | goto out; | |
5440 | } | |
5441 | ||
6cf2f1d9 HH |
5442 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
5443 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
5444 | set = setlocale(LC_CTYPE, NULL); |
5445 | if (!set) { | |
5446 | cached_answer = true; | |
5447 | goto out; | |
5448 | } | |
5449 | ||
6cf2f1d9 HH |
5450 | /* Check result, but ignore the result if C was set |
5451 | * explicitly. */ | |
5452 | cached_answer = | |
5453 | streq(set, "C") && | |
5454 | !getenv("LC_ALL") && | |
5455 | !getenv("LC_CTYPE") && | |
5456 | !getenv("LANG"); | |
fee79e01 | 5457 | |
09017585 | 5458 | out: |
6cf2f1d9 | 5459 | return (bool) cached_answer; |
09017585 | 5460 | } |
c339d977 MS |
5461 | |
5462 | const char *draw_special_char(DrawSpecialChar ch) { | |
5463 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
5464 | /* UTF-8 */ { | |
45a5ff0d MS |
5465 | [DRAW_TREE_VERT] = "\342\224\202 ", /* │ */ |
5466 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ | |
5467 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5468 | [DRAW_TREE_SPACE] = " ", /* */ |
45a5ff0d | 5469 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243 ", /* ‣ */ |
3deadb91 | 5470 | [DRAW_BLACK_CIRCLE] = "\342\227\217 ", /* ● */ |
c339d977 MS |
5471 | }, |
5472 | /* ASCII fallback */ { | |
45a5ff0d MS |
5473 | [DRAW_TREE_VERT] = "| ", |
5474 | [DRAW_TREE_BRANCH] = "|-", | |
5475 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5476 | [DRAW_TREE_SPACE] = " ", |
45a5ff0d | 5477 | [DRAW_TRIANGULAR_BULLET] = "> ", |
3deadb91 | 5478 | [DRAW_BLACK_CIRCLE] = "* ", |
c339d977 MS |
5479 | } |
5480 | }; | |
5481 | ||
5482 | return draw_table[!is_locale_utf8()][ch]; | |
5483 | } | |
409bc9c3 LP |
5484 | |
5485 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5486 | const char *f; | |
5487 | char *t, *r; | |
5488 | size_t l, old_len, new_len; | |
5489 | ||
5490 | assert(text); | |
5491 | assert(old_string); | |
5492 | assert(new_string); | |
5493 | ||
5494 | old_len = strlen(old_string); | |
5495 | new_len = strlen(new_string); | |
5496 | ||
5497 | l = strlen(text); | |
5498 | r = new(char, l+1); | |
5499 | if (!r) | |
5500 | return NULL; | |
5501 | ||
5502 | f = text; | |
5503 | t = r; | |
5504 | while (*f) { | |
5505 | char *a; | |
5506 | size_t d, nl; | |
5507 | ||
5508 | if (!startswith(f, old_string)) { | |
5509 | *(t++) = *(f++); | |
5510 | continue; | |
5511 | } | |
5512 | ||
5513 | d = t - r; | |
5514 | nl = l - old_len + new_len; | |
5515 | a = realloc(r, nl + 1); | |
5516 | if (!a) | |
5517 | goto oom; | |
5518 | ||
5519 | l = nl; | |
5520 | r = a; | |
5521 | t = r + d; | |
5522 | ||
5523 | t = stpcpy(t, new_string); | |
5524 | f += old_len; | |
5525 | } | |
5526 | ||
5527 | *t = 0; | |
5528 | return r; | |
5529 | ||
5530 | oom: | |
5531 | free(r); | |
5532 | return NULL; | |
5533 | } | |
e8bc0ea2 LP |
5534 | |
5535 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5536 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5537 | enum { |
5538 | STATE_OTHER, | |
5539 | STATE_ESCAPE, | |
5540 | STATE_BRACKET | |
5541 | } state = STATE_OTHER; | |
5542 | char *obuf = NULL; | |
5543 | size_t osz = 0, isz; | |
5544 | FILE *f; | |
5545 | ||
5546 | assert(ibuf); | |
5547 | assert(*ibuf); | |
5548 | ||
5549 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5550 | ||
5551 | isz = _isz ? *_isz : strlen(*ibuf); | |
5552 | ||
5553 | f = open_memstream(&obuf, &osz); | |
5554 | if (!f) | |
5555 | return NULL; | |
5556 | ||
5557 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5558 | ||
5559 | switch (state) { | |
5560 | ||
5561 | case STATE_OTHER: | |
5562 | if (i >= *ibuf + isz) /* EOT */ | |
5563 | break; | |
5564 | else if (*i == '\x1B') | |
5565 | state = STATE_ESCAPE; | |
5566 | else if (*i == '\t') | |
5567 | fputs(" ", f); | |
5568 | else | |
5569 | fputc(*i, f); | |
5570 | break; | |
5571 | ||
5572 | case STATE_ESCAPE: | |
5573 | if (i >= *ibuf + isz) { /* EOT */ | |
5574 | fputc('\x1B', f); | |
5575 | break; | |
5576 | } else if (*i == '[') { | |
5577 | state = STATE_BRACKET; | |
5578 | begin = i + 1; | |
5579 | } else { | |
5580 | fputc('\x1B', f); | |
5581 | fputc(*i, f); | |
5582 | state = STATE_OTHER; | |
5583 | } | |
5584 | ||
5585 | break; | |
5586 | ||
5587 | case STATE_BRACKET: | |
5588 | ||
5589 | if (i >= *ibuf + isz || /* EOT */ | |
5590 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5591 | fputc('\x1B', f); | |
5592 | fputc('[', f); | |
5593 | state = STATE_OTHER; | |
5594 | i = begin-1; | |
5595 | } else if (*i == 'm') | |
5596 | state = STATE_OTHER; | |
5597 | break; | |
5598 | } | |
5599 | } | |
5600 | ||
5601 | if (ferror(f)) { | |
5602 | fclose(f); | |
5603 | free(obuf); | |
5604 | return NULL; | |
5605 | } | |
5606 | ||
5607 | fclose(f); | |
5608 | ||
5609 | free(*ibuf); | |
5610 | *ibuf = obuf; | |
5611 | ||
5612 | if (_isz) | |
5613 | *_isz = osz; | |
5614 | ||
5615 | return obuf; | |
5616 | } | |
240dbaa4 LP |
5617 | |
5618 | int on_ac_power(void) { | |
5619 | bool found_offline = false, found_online = false; | |
5620 | _cleanup_closedir_ DIR *d = NULL; | |
5621 | ||
5622 | d = opendir("/sys/class/power_supply"); | |
5623 | if (!d) | |
5624 | return -errno; | |
5625 | ||
5626 | for (;;) { | |
5627 | struct dirent *de; | |
240dbaa4 LP |
5628 | _cleanup_close_ int fd = -1, device = -1; |
5629 | char contents[6]; | |
5630 | ssize_t n; | |
240dbaa4 | 5631 | |
3fd11280 FW |
5632 | errno = 0; |
5633 | de = readdir(d); | |
5634 | if (!de && errno != 0) | |
5635 | return -errno; | |
240dbaa4 LP |
5636 | |
5637 | if (!de) | |
5638 | break; | |
5639 | ||
5640 | if (ignore_file(de->d_name)) | |
5641 | continue; | |
5642 | ||
5643 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5644 | if (device < 0) { | |
5645 | if (errno == ENOENT || errno == ENOTDIR) | |
5646 | continue; | |
5647 | ||
5648 | return -errno; | |
5649 | } | |
5650 | ||
5651 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5652 | if (fd < 0) { | |
5653 | if (errno == ENOENT) | |
5654 | continue; | |
5655 | ||
5656 | return -errno; | |
5657 | } | |
5658 | ||
5659 | n = read(fd, contents, sizeof(contents)); | |
5660 | if (n < 0) | |
5661 | return -errno; | |
5662 | ||
5663 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5664 | continue; | |
5665 | ||
5666 | close_nointr_nofail(fd); | |
5667 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5668 | if (fd < 0) { | |
5669 | if (errno == ENOENT) | |
5670 | continue; | |
5671 | ||
5672 | return -errno; | |
5673 | } | |
5674 | ||
5675 | n = read(fd, contents, sizeof(contents)); | |
5676 | if (n < 0) | |
5677 | return -errno; | |
5678 | ||
5679 | if (n != 2 || contents[1] != '\n') | |
5680 | return -EIO; | |
5681 | ||
5682 | if (contents[0] == '1') { | |
5683 | found_online = true; | |
5684 | break; | |
5685 | } else if (contents[0] == '0') | |
5686 | found_offline = true; | |
5687 | else | |
5688 | return -EIO; | |
5689 | } | |
5690 | ||
5691 | return found_online || !found_offline; | |
5692 | } | |
fabe5c0e LP |
5693 | |
5694 | static int search_and_fopen_internal(const char *path, const char *mode, char **search, FILE **_f) { | |
5695 | char **i; | |
5696 | ||
5697 | assert(path); | |
5698 | assert(mode); | |
5699 | assert(_f); | |
5700 | ||
5701 | if (!path_strv_canonicalize_uniq(search)) | |
5702 | return -ENOMEM; | |
5703 | ||
5704 | STRV_FOREACH(i, search) { | |
5705 | _cleanup_free_ char *p = NULL; | |
5706 | FILE *f; | |
5707 | ||
5708 | p = strjoin(*i, "/", path, NULL); | |
5709 | if (!p) | |
5710 | return -ENOMEM; | |
5711 | ||
5712 | f = fopen(p, mode); | |
5713 | if (f) { | |
5714 | *_f = f; | |
5715 | return 0; | |
5716 | } | |
5717 | ||
5718 | if (errno != ENOENT) | |
5719 | return -errno; | |
5720 | } | |
5721 | ||
5722 | return -ENOENT; | |
5723 | } | |
5724 | ||
5725 | int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f) { | |
5726 | _cleanup_strv_free_ char **copy = NULL; | |
5727 | ||
5728 | assert(path); | |
5729 | assert(mode); | |
5730 | assert(_f); | |
5731 | ||
5732 | if (path_is_absolute(path)) { | |
5733 | FILE *f; | |
5734 | ||
5735 | f = fopen(path, mode); | |
5736 | if (f) { | |
5737 | *_f = f; | |
5738 | return 0; | |
5739 | } | |
5740 | ||
5741 | return -errno; | |
5742 | } | |
5743 | ||
5744 | copy = strv_copy((char**) search); | |
5745 | if (!copy) | |
5746 | return -ENOMEM; | |
5747 | ||
5748 | return search_and_fopen_internal(path, mode, copy, _f); | |
5749 | } | |
5750 | ||
5751 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f) { | |
5752 | _cleanup_strv_free_ char **s = NULL; | |
5753 | ||
5754 | if (path_is_absolute(path)) { | |
5755 | FILE *f; | |
5756 | ||
5757 | f = fopen(path, mode); | |
5758 | if (f) { | |
5759 | *_f = f; | |
5760 | return 0; | |
5761 | } | |
5762 | ||
5763 | return -errno; | |
5764 | } | |
5765 | ||
5766 | s = strv_split_nulstr(search); | |
5767 | if (!s) | |
5768 | return -ENOMEM; | |
5769 | ||
5770 | return search_and_fopen_internal(path, mode, s, _f); | |
5771 | } | |
c17ec25e | 5772 | |
66e35261 LP |
5773 | char *strextend(char **x, ...) { |
5774 | va_list ap; | |
5775 | size_t f, l; | |
5776 | char *r, *p; | |
5777 | ||
5778 | assert(x); | |
5779 | ||
5780 | l = f = *x ? strlen(*x) : 0; | |
5781 | ||
5782 | va_start(ap, x); | |
5783 | for (;;) { | |
5784 | const char *t; | |
5785 | size_t n; | |
5786 | ||
5787 | t = va_arg(ap, const char *); | |
5788 | if (!t) | |
5789 | break; | |
5790 | ||
5791 | n = strlen(t); | |
5792 | if (n > ((size_t) -1) - l) { | |
5793 | va_end(ap); | |
5794 | return NULL; | |
5795 | } | |
5796 | ||
5797 | l += n; | |
5798 | } | |
5799 | va_end(ap); | |
5800 | ||
5801 | r = realloc(*x, l+1); | |
5802 | if (!r) | |
5803 | return NULL; | |
5804 | ||
5805 | p = r + f; | |
5806 | ||
5807 | va_start(ap, x); | |
5808 | for (;;) { | |
5809 | const char *t; | |
5810 | ||
5811 | t = va_arg(ap, const char *); | |
5812 | if (!t) | |
5813 | break; | |
5814 | ||
5815 | p = stpcpy(p, t); | |
5816 | } | |
5817 | va_end(ap); | |
5818 | ||
5819 | *p = 0; | |
5820 | *x = r; | |
5821 | ||
5822 | return r + l; | |
5823 | } | |
9a17484d LP |
5824 | |
5825 | char *strrep(const char *s, unsigned n) { | |
5826 | size_t l; | |
5827 | char *r, *p; | |
5828 | unsigned i; | |
5829 | ||
5830 | assert(s); | |
5831 | ||
5832 | l = strlen(s); | |
5833 | p = r = malloc(l * n + 1); | |
5834 | if (!r) | |
5835 | return NULL; | |
5836 | ||
5837 | for (i = 0; i < n; i++) | |
5838 | p = stpcpy(p, s); | |
5839 | ||
5840 | *p = 0; | |
5841 | return r; | |
5842 | } | |
392d5b37 LP |
5843 | |
5844 | void* greedy_realloc(void **p, size_t *allocated, size_t need) { | |
5845 | size_t a; | |
5846 | void *q; | |
5847 | ||
98088803 | 5848 | assert(p); |
e93c33d4 SL |
5849 | assert(allocated); |
5850 | ||
392d5b37 LP |
5851 | if (*allocated >= need) |
5852 | return *p; | |
5853 | ||
9607d947 | 5854 | a = MAX(64u, need * 2); |
98088803 LP |
5855 | |
5856 | /* check for overflows */ | |
5857 | if (a < need) | |
5858 | return NULL; | |
5859 | ||
392d5b37 LP |
5860 | q = realloc(*p, a); |
5861 | if (!q) | |
5862 | return NULL; | |
5863 | ||
5864 | *p = q; | |
5865 | *allocated = a; | |
5866 | return q; | |
5867 | } | |
aa96c6cb | 5868 | |
4545a231 | 5869 | void* greedy_realloc0(void **p, size_t *allocated, size_t need) { |
98088803 | 5870 | size_t prev; |
4545a231 DH |
5871 | uint8_t *q; |
5872 | ||
98088803 LP |
5873 | assert(p); |
5874 | assert(allocated); | |
5875 | ||
5876 | prev = *allocated; | |
5877 | ||
4545a231 DH |
5878 | q = greedy_realloc(p, allocated, need); |
5879 | if (!q) | |
5880 | return NULL; | |
5881 | ||
5882 | if (*allocated > prev) | |
5883 | memset(&q[prev], 0, *allocated - prev); | |
5884 | ||
5885 | return q; | |
5886 | } | |
5887 | ||
aa96c6cb LP |
5888 | bool id128_is_valid(const char *s) { |
5889 | size_t i, l; | |
5890 | ||
5891 | l = strlen(s); | |
5892 | if (l == 32) { | |
5893 | ||
5894 | /* Simple formatted 128bit hex string */ | |
5895 | ||
5896 | for (i = 0; i < l; i++) { | |
5897 | char c = s[i]; | |
5898 | ||
5899 | if (!(c >= '0' && c <= '9') && | |
5900 | !(c >= 'a' && c <= 'z') && | |
5901 | !(c >= 'A' && c <= 'Z')) | |
5902 | return false; | |
5903 | } | |
5904 | ||
5905 | } else if (l == 36) { | |
5906 | ||
5907 | /* Formatted UUID */ | |
5908 | ||
5909 | for (i = 0; i < l; i++) { | |
5910 | char c = s[i]; | |
5911 | ||
5912 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
5913 | if (c != '-') | |
5914 | return false; | |
5915 | } else { | |
5916 | if (!(c >= '0' && c <= '9') && | |
5917 | !(c >= 'a' && c <= 'z') && | |
5918 | !(c >= 'A' && c <= 'Z')) | |
5919 | return false; | |
5920 | } | |
5921 | } | |
5922 | ||
5923 | } else | |
5924 | return false; | |
5925 | ||
5926 | return true; | |
5927 | } | |
7085053a DW |
5928 | |
5929 | void parse_user_at_host(char *arg, char **user, char **host) { | |
5930 | assert(arg); | |
5931 | assert(user); | |
5932 | assert(host); | |
5933 | ||
5934 | *host = strchr(arg, '@'); | |
5935 | if (*host == NULL) | |
5936 | *host = arg; | |
5937 | else { | |
5938 | *host[0]++ = '\0'; | |
5939 | *user = arg; | |
5940 | } | |
5941 | } | |
d4ac85c6 LP |
5942 | |
5943 | int split_pair(const char *s, const char *sep, char **l, char **r) { | |
5944 | char *x, *a, *b; | |
5945 | ||
5946 | assert(s); | |
5947 | assert(sep); | |
5948 | assert(l); | |
5949 | assert(r); | |
5950 | ||
5951 | if (isempty(sep)) | |
5952 | return -EINVAL; | |
5953 | ||
5954 | x = strstr(s, sep); | |
5955 | if (!x) | |
5956 | return -EINVAL; | |
5957 | ||
5958 | a = strndup(s, x - s); | |
5959 | if (!a) | |
5960 | return -ENOMEM; | |
5961 | ||
5962 | b = strdup(x + strlen(sep)); | |
5963 | if (!b) { | |
5964 | free(a); | |
5965 | return -ENOMEM; | |
5966 | } | |
5967 | ||
5968 | *l = a; | |
5969 | *r = b; | |
5970 | ||
5971 | return 0; | |
5972 | } | |
295edddf | 5973 | |
74df0fca | 5974 | int shall_restore_state(void) { |
295edddf TG |
5975 | _cleanup_free_ char *line; |
5976 | char *w, *state; | |
295edddf | 5977 | size_t l; |
74df0fca | 5978 | int r; |
295edddf | 5979 | |
74df0fca LP |
5980 | r = proc_cmdline(&line); |
5981 | if (r < 0) | |
5982 | return r; | |
5983 | if (r == 0) /* Container ... */ | |
5984 | return 1; | |
295edddf | 5985 | |
74df0fca | 5986 | FOREACH_WORD_QUOTED(w, l, line, state) |
85ca9433 | 5987 | if (l == 23 && strneq(w, "systemd.restore_state=0", 23)) |
74df0fca LP |
5988 | return 0; |
5989 | ||
5990 | return 1; | |
5991 | } | |
5992 | ||
5993 | int proc_cmdline(char **ret) { | |
5994 | int r; | |
5995 | ||
5996 | if (detect_container(NULL) > 0) { | |
02bb6cda LP |
5997 | char *buf, *p; |
5998 | size_t sz = 0; | |
5999 | ||
6000 | r = read_full_file("/proc/1/cmdline", &buf, &sz); | |
6001 | if (r < 0) | |
6002 | return r; | |
6003 | ||
6004 | for (p = buf; p + 1 < buf + sz; p++) | |
6005 | if (*p == 0) | |
6006 | *p = ' '; | |
6007 | ||
6008 | *p = 0; | |
6009 | *ret = buf; | |
6010 | return 1; | |
295edddf TG |
6011 | } |
6012 | ||
74df0fca LP |
6013 | r = read_one_line_file("/proc/cmdline", ret); |
6014 | if (r < 0) | |
6015 | return r; | |
295edddf | 6016 | |
74df0fca | 6017 | return 1; |
295edddf | 6018 | } |
bc9fd78c LP |
6019 | |
6020 | int container_get_leader(const char *machine, pid_t *pid) { | |
6021 | _cleanup_free_ char *s = NULL, *class = NULL; | |
6022 | const char *p; | |
6023 | pid_t leader; | |
6024 | int r; | |
6025 | ||
6026 | assert(machine); | |
6027 | assert(pid); | |
6028 | ||
6029 | p = strappenda("/run/systemd/machines/", machine); | |
6030 | r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); | |
6031 | if (r == -ENOENT) | |
6032 | return -EHOSTDOWN; | |
6033 | if (r < 0) | |
6034 | return r; | |
6035 | if (!s) | |
6036 | return -EIO; | |
6037 | ||
6038 | if (!streq_ptr(class, "container")) | |
6039 | return -EIO; | |
6040 | ||
6041 | r = parse_pid(s, &leader); | |
6042 | if (r < 0) | |
6043 | return r; | |
6044 | if (leader <= 1) | |
6045 | return -EIO; | |
6046 | ||
6047 | *pid = leader; | |
6048 | return 0; | |
6049 | } | |
6050 | ||
a4475f57 LP |
6051 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd) { |
6052 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1; | |
6053 | const char *pidns, *mntns, *root; | |
bc9fd78c LP |
6054 | int rfd; |
6055 | ||
6056 | assert(pid >= 0); | |
a4475f57 LP |
6057 | assert(pidns_fd); |
6058 | assert(mntns_fd); | |
bc9fd78c LP |
6059 | assert(root_fd); |
6060 | ||
a4475f57 LP |
6061 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
6062 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6063 | if (mntnsfd < 0) | |
6064 | return -errno; | |
6065 | ||
6066 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
6067 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6068 | if (pidnsfd < 0) | |
bc9fd78c LP |
6069 | return -errno; |
6070 | ||
6071 | root = procfs_file_alloca(pid, "root"); | |
6072 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
6073 | if (rfd < 0) | |
6074 | return -errno; | |
6075 | ||
a4475f57 LP |
6076 | *pidns_fd = pidnsfd; |
6077 | *mntns_fd = mntnsfd; | |
bc9fd78c | 6078 | *root_fd = rfd; |
a4475f57 LP |
6079 | pidnsfd = -1; |
6080 | mntnsfd = -1; | |
bc9fd78c LP |
6081 | |
6082 | return 0; | |
6083 | } | |
6084 | ||
a4475f57 LP |
6085 | int namespace_enter(int pidns_fd, int mntns_fd, int root_fd) { |
6086 | assert(pidns_fd >= 0); | |
6087 | assert(mntns_fd >= 0); | |
bc9fd78c LP |
6088 | assert(root_fd >= 0); |
6089 | ||
a4475f57 LP |
6090 | if (setns(pidns_fd, CLONE_NEWPID) < 0) |
6091 | return -errno; | |
6092 | ||
6093 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
bc9fd78c LP |
6094 | return -errno; |
6095 | ||
6096 | if (fchdir(root_fd) < 0) | |
6097 | return -errno; | |
6098 | ||
6099 | if (chroot(".") < 0) | |
6100 | return -errno; | |
6101 | ||
5e2b3214 LP |
6102 | if (setresgid(0, 0, 0) < 0) |
6103 | return -errno; | |
6104 | ||
6105 | if (setresuid(0, 0, 0) < 0) | |
6106 | return -errno; | |
6107 | ||
bc9fd78c LP |
6108 | return 0; |
6109 | } | |
bf108e55 LP |
6110 | |
6111 | bool pid_valid(pid_t pid) { | |
6112 | if (pid <= 0) | |
6113 | return false; | |
6114 | ||
6115 | if (kill(pid, 0) >= 0) | |
6116 | return true; | |
6117 | ||
6118 | return errno != ESRCH; | |
6119 | } |