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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> | |
8d567588 | 44 | #include <libgen.h> |
3177a7fa | 45 | #include <ctype.h> |
5b6319dc | 46 | #include <sys/prctl.h> |
ef2f1067 LP |
47 | #include <sys/utsname.h> |
48 | #include <pwd.h> | |
4fd5948e | 49 | #include <netinet/ip.h> |
3fe5e5d4 | 50 | #include <linux/kd.h> |
afea26ad | 51 | #include <dlfcn.h> |
2e78aa99 | 52 | #include <sys/wait.h> |
7948c4df | 53 | #include <sys/time.h> |
8092a428 | 54 | #include <glob.h> |
4b67834e | 55 | #include <grp.h> |
87d2c1ff | 56 | #include <sys/mman.h> |
825c6fe5 LP |
57 | #include <sys/vfs.h> |
58 | #include <linux/magic.h> | |
0b507b17 | 59 | #include <limits.h> |
09017585 MS |
60 | #include <langinfo.h> |
61 | #include <locale.h> | |
844ec79b | 62 | #include <libgen.h> |
60918275 LP |
63 | |
64 | #include "macro.h" | |
65 | #include "util.h" | |
1dccbe19 LP |
66 | #include "ioprio.h" |
67 | #include "missing.h" | |
a9f5d454 | 68 | #include "log.h" |
65d2ebdc | 69 | #include "strv.h" |
e51bc1a2 | 70 | #include "label.h" |
9eb977db | 71 | #include "path-util.h" |
d06dacd0 | 72 | #include "exit-status.h" |
83cc030f | 73 | #include "hashmap.h" |
4d1a6904 | 74 | #include "env-util.h" |
a5c32cff | 75 | #include "fileio.h" |
8f6ce71f | 76 | #include "device-nodes.h" |
f405e86d SL |
77 | #include "utf8.h" |
78 | #include "gunicode.h" | |
295edddf | 79 | #include "virt.h" |
477def80 | 80 | #include "def.h" |
56cf987f | 81 | |
9a0e6896 LP |
82 | int saved_argc = 0; |
83 | char **saved_argv = NULL; | |
9086e840 | 84 | |
28917d7d | 85 | static volatile unsigned cached_columns = 0; |
ed757c0c | 86 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 87 | |
37f85e66 | 88 | size_t page_size(void) { |
89 | static __thread size_t pgsz = 0; | |
90 | long r; | |
91 | ||
87d2c1ff | 92 | if (_likely_(pgsz > 0)) |
37f85e66 | 93 | return pgsz; |
94 | ||
e67f47e5 LP |
95 | r = sysconf(_SC_PAGESIZE); |
96 | assert(r > 0); | |
37f85e66 | 97 | |
98 | pgsz = (size_t) r; | |
37f85e66 | 99 | return pgsz; |
100 | } | |
101 | ||
e05797fb LP |
102 | bool streq_ptr(const char *a, const char *b) { |
103 | ||
104 | /* Like streq(), but tries to make sense of NULL pointers */ | |
105 | ||
106 | if (a && b) | |
107 | return streq(a, b); | |
108 | ||
109 | if (!a && !b) | |
110 | return true; | |
111 | ||
112 | return false; | |
113 | } | |
114 | ||
8c7c140f | 115 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
116 | size_t sl, pl; |
117 | ||
118 | assert(s); | |
119 | assert(postfix); | |
120 | ||
121 | sl = strlen(s); | |
122 | pl = strlen(postfix); | |
123 | ||
d4d0d4db | 124 | if (pl == 0) |
8c7c140f | 125 | return (char*) s + sl; |
d4d0d4db | 126 | |
60918275 | 127 | if (sl < pl) |
8c7c140f LP |
128 | return NULL; |
129 | ||
130 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
131 | return NULL; | |
60918275 | 132 | |
8c7c140f | 133 | return (char*) s + sl - pl; |
60918275 LP |
134 | } |
135 | ||
79d6d816 LP |
136 | bool first_word(const char *s, const char *word) { |
137 | size_t sl, wl; | |
138 | ||
139 | assert(s); | |
140 | assert(word); | |
141 | ||
142 | sl = strlen(s); | |
143 | wl = strlen(word); | |
144 | ||
145 | if (sl < wl) | |
146 | return false; | |
147 | ||
d4d0d4db LP |
148 | if (wl == 0) |
149 | return true; | |
150 | ||
79d6d816 LP |
151 | if (memcmp(s, word, wl) != 0) |
152 | return false; | |
153 | ||
d4d0d4db LP |
154 | return s[wl] == 0 || |
155 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
156 | } |
157 | ||
42f4e3c4 | 158 | int close_nointr(int fd) { |
b0ee8068 | 159 | int r; |
60918275 | 160 | |
b0ee8068 CW |
161 | assert(fd >= 0); |
162 | r = close(fd); | |
163 | ||
164 | /* Just ignore EINTR; a retry loop is the wrong | |
165 | * thing to do on Linux. | |
166 | * | |
167 | * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html | |
168 | * https://bugzilla.gnome.org/show_bug.cgi?id=682819 | |
169 | * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR | |
170 | * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain | |
171 | */ | |
172 | if (_unlikely_(r < 0 && errno == EINTR)) | |
173 | return 0; | |
174 | else if (r >= 0) | |
175 | return r; | |
176 | else | |
177 | return -errno; | |
60918275 | 178 | } |
85261803 | 179 | |
85f136b5 | 180 | void close_nointr_nofail(int fd) { |
5c0aa72a | 181 | PROTECT_ERRNO; |
85f136b5 LP |
182 | |
183 | /* like close_nointr() but cannot fail, and guarantees errno | |
184 | * is unchanged */ | |
185 | ||
186 | assert_se(close_nointr(fd) == 0); | |
187 | } | |
188 | ||
5b6319dc LP |
189 | void close_many(const int fds[], unsigned n_fd) { |
190 | unsigned i; | |
191 | ||
2c93b4ef LP |
192 | assert(fds || n_fd <= 0); |
193 | ||
5b6319dc LP |
194 | for (i = 0; i < n_fd; i++) |
195 | close_nointr_nofail(fds[i]); | |
196 | } | |
197 | ||
4b73a0c0 LP |
198 | int unlink_noerrno(const char *path) { |
199 | PROTECT_ERRNO; | |
200 | int r; | |
201 | ||
202 | r = unlink(path); | |
203 | if (r < 0) | |
204 | return -errno; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
85261803 LP |
209 | int parse_boolean(const char *v) { |
210 | assert(v); | |
211 | ||
b43d1d01 | 212 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || strcaseeq(v, "on")) |
85261803 | 213 | return 1; |
b43d1d01 | 214 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || strcaseeq(v, "off")) |
85261803 LP |
215 | return 0; |
216 | ||
217 | return -EINVAL; | |
218 | } | |
219 | ||
3ba686c1 | 220 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 221 | unsigned long ul = 0; |
3ba686c1 LP |
222 | pid_t pid; |
223 | int r; | |
224 | ||
225 | assert(s); | |
226 | assert(ret_pid); | |
227 | ||
e67f47e5 LP |
228 | r = safe_atolu(s, &ul); |
229 | if (r < 0) | |
3ba686c1 LP |
230 | return r; |
231 | ||
232 | pid = (pid_t) ul; | |
233 | ||
234 | if ((unsigned long) pid != ul) | |
235 | return -ERANGE; | |
236 | ||
237 | if (pid <= 0) | |
238 | return -ERANGE; | |
239 | ||
240 | *ret_pid = pid; | |
241 | return 0; | |
242 | } | |
243 | ||
034a2a52 LP |
244 | int parse_uid(const char *s, uid_t* ret_uid) { |
245 | unsigned long ul = 0; | |
246 | uid_t uid; | |
247 | int r; | |
248 | ||
249 | assert(s); | |
250 | assert(ret_uid); | |
251 | ||
e67f47e5 LP |
252 | r = safe_atolu(s, &ul); |
253 | if (r < 0) | |
034a2a52 LP |
254 | return r; |
255 | ||
256 | uid = (uid_t) ul; | |
257 | ||
258 | if ((unsigned long) uid != ul) | |
259 | return -ERANGE; | |
260 | ||
261 | *ret_uid = uid; | |
262 | return 0; | |
263 | } | |
264 | ||
85261803 LP |
265 | int safe_atou(const char *s, unsigned *ret_u) { |
266 | char *x = NULL; | |
034c6ed7 | 267 | unsigned long l; |
85261803 LP |
268 | |
269 | assert(s); | |
270 | assert(ret_u); | |
271 | ||
272 | errno = 0; | |
273 | l = strtoul(s, &x, 0); | |
274 | ||
f3910003 | 275 | if (!x || x == s || *x || errno) |
48deb058 | 276 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 277 | |
034c6ed7 | 278 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
279 | return -ERANGE; |
280 | ||
281 | *ret_u = (unsigned) l; | |
282 | return 0; | |
283 | } | |
284 | ||
285 | int safe_atoi(const char *s, int *ret_i) { | |
286 | char *x = NULL; | |
034c6ed7 | 287 | long l; |
85261803 LP |
288 | |
289 | assert(s); | |
290 | assert(ret_i); | |
291 | ||
292 | errno = 0; | |
293 | l = strtol(s, &x, 0); | |
294 | ||
f3910003 | 295 | if (!x || x == s || *x || errno) |
48deb058 | 296 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 297 | |
034c6ed7 | 298 | if ((long) (int) l != l) |
85261803 LP |
299 | return -ERANGE; |
300 | ||
034c6ed7 LP |
301 | *ret_i = (int) l; |
302 | return 0; | |
303 | } | |
304 | ||
034c6ed7 LP |
305 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
306 | char *x = NULL; | |
307 | unsigned long long l; | |
308 | ||
309 | assert(s); | |
310 | assert(ret_llu); | |
311 | ||
312 | errno = 0; | |
313 | l = strtoull(s, &x, 0); | |
314 | ||
f3910003 | 315 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
316 | return errno ? -errno : -EINVAL; |
317 | ||
318 | *ret_llu = l; | |
319 | return 0; | |
320 | } | |
321 | ||
322 | int safe_atolli(const char *s, long long int *ret_lli) { | |
323 | char *x = NULL; | |
324 | long long l; | |
325 | ||
326 | assert(s); | |
327 | assert(ret_lli); | |
328 | ||
329 | errno = 0; | |
330 | l = strtoll(s, &x, 0); | |
331 | ||
f3910003 | 332 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
333 | return errno ? -errno : -EINVAL; |
334 | ||
335 | *ret_lli = l; | |
85261803 LP |
336 | return 0; |
337 | } | |
a41e8209 | 338 | |
f7900e25 TA |
339 | int safe_atod(const char *s, double *ret_d) { |
340 | char *x = NULL; | |
32b2634e | 341 | double d = 0; |
f7900e25 TA |
342 | |
343 | assert(s); | |
344 | assert(ret_d); | |
345 | ||
d6dd604b LP |
346 | RUN_WITH_LOCALE(LC_NUMERIC_MASK, "C") { |
347 | errno = 0; | |
348 | d = strtod(s, &x); | |
349 | } | |
f7900e25 TA |
350 | |
351 | if (!x || x == s || *x || errno) | |
352 | return errno ? -errno : -EINVAL; | |
353 | ||
354 | *ret_d = (double) d; | |
355 | return 0; | |
356 | } | |
357 | ||
a41e8209 | 358 | /* Split a string into words. */ |
65d2ebdc | 359 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
360 | char *current; |
361 | ||
362 | current = *state ? *state : (char*) c; | |
363 | ||
364 | if (!*current || *c == 0) | |
365 | return NULL; | |
366 | ||
65d2ebdc LP |
367 | current += strspn(current, separator); |
368 | *l = strcspn(current, separator); | |
82919e3d LP |
369 | *state = current+*l; |
370 | ||
371 | return (char*) current; | |
372 | } | |
373 | ||
034c6ed7 LP |
374 | /* Split a string into words, but consider strings enclosed in '' and |
375 | * "" as words even if they include spaces. */ | |
376 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
377 | char *current, *e; |
378 | bool escaped = false; | |
034c6ed7 LP |
379 | |
380 | current = *state ? *state : (char*) c; | |
381 | ||
382 | if (!*current || *c == 0) | |
383 | return NULL; | |
384 | ||
385 | current += strspn(current, WHITESPACE); | |
386 | ||
387 | if (*current == '\'') { | |
388 | current ++; | |
034c6ed7 | 389 | |
0bab36f2 LP |
390 | for (e = current; *e; e++) { |
391 | if (escaped) | |
392 | escaped = false; | |
393 | else if (*e == '\\') | |
394 | escaped = true; | |
395 | else if (*e == '\'') | |
396 | break; | |
397 | } | |
398 | ||
399 | *l = e-current; | |
400 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
401 | } else if (*current == '\"') { |
402 | current ++; | |
034c6ed7 | 403 | |
0bab36f2 LP |
404 | for (e = current; *e; e++) { |
405 | if (escaped) | |
406 | escaped = false; | |
407 | else if (*e == '\\') | |
408 | escaped = true; | |
409 | else if (*e == '\"') | |
410 | break; | |
411 | } | |
412 | ||
413 | *l = e-current; | |
414 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 415 | } else { |
0bab36f2 LP |
416 | for (e = current; *e; e++) { |
417 | if (escaped) | |
418 | escaped = false; | |
419 | else if (*e == '\\') | |
420 | escaped = true; | |
421 | else if (strchr(WHITESPACE, *e)) | |
422 | break; | |
423 | } | |
424 | *l = e-current; | |
425 | *state = e; | |
034c6ed7 LP |
426 | } |
427 | ||
428 | return (char*) current; | |
429 | } | |
430 | ||
034c6ed7 LP |
431 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
432 | int r; | |
2fbe635a | 433 | _cleanup_fclose_ FILE *f = NULL; |
49aa47c7 | 434 | char line[LINE_MAX]; |
bb00e604 | 435 | long unsigned ppid; |
49aa47c7 | 436 | const char *p; |
034c6ed7 | 437 | |
49aa47c7 | 438 | assert(pid >= 0); |
034c6ed7 LP |
439 | assert(_ppid); |
440 | ||
49aa47c7 LP |
441 | if (pid == 0) { |
442 | *_ppid = getppid(); | |
443 | return 0; | |
444 | } | |
034c6ed7 | 445 | |
49aa47c7 LP |
446 | p = procfs_file_alloca(pid, "stat"); |
447 | f = fopen(p, "re"); | |
2fbe635a | 448 | if (!f) |
034c6ed7 LP |
449 | return -errno; |
450 | ||
2fbe635a | 451 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 452 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
453 | return r; |
454 | } | |
455 | ||
034c6ed7 LP |
456 | /* Let's skip the pid and comm fields. The latter is enclosed |
457 | * in () but does not escape any () in its value, so let's | |
458 | * skip over it manually */ | |
459 | ||
2fbe635a LP |
460 | p = strrchr(line, ')'); |
461 | if (!p) | |
034c6ed7 LP |
462 | return -EIO; |
463 | ||
464 | p++; | |
465 | ||
466 | if (sscanf(p, " " | |
467 | "%*c " /* state */ | |
bb00e604 | 468 | "%lu ", /* ppid */ |
034c6ed7 LP |
469 | &ppid) != 1) |
470 | return -EIO; | |
471 | ||
bb00e604 | 472 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
473 | return -ERANGE; |
474 | ||
475 | *_ppid = (pid_t) ppid; | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
7640a5de | 480 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
e67f47e5 | 481 | _cleanup_fclose_ FILE *f = NULL; |
49aa47c7 LP |
482 | char line[LINE_MAX]; |
483 | const char *p; | |
7640a5de | 484 | |
49aa47c7 | 485 | assert(pid >= 0); |
7640a5de LP |
486 | assert(st); |
487 | ||
49aa47c7 LP |
488 | if (pid == 0) |
489 | p = "/proc/self/stat"; | |
490 | else | |
491 | p = procfs_file_alloca(pid, "stat"); | |
7640a5de | 492 | |
49aa47c7 | 493 | f = fopen(p, "re"); |
e67f47e5 | 494 | if (!f) |
7640a5de LP |
495 | return -errno; |
496 | ||
e67f47e5 LP |
497 | if (!fgets(line, sizeof(line), f)) { |
498 | if (ferror(f)) | |
499 | return -errno; | |
7640a5de | 500 | |
e67f47e5 LP |
501 | return -EIO; |
502 | } | |
7640a5de LP |
503 | |
504 | /* Let's skip the pid and comm fields. The latter is enclosed | |
505 | * in () but does not escape any () in its value, so let's | |
506 | * skip over it manually */ | |
507 | ||
e67f47e5 LP |
508 | p = strrchr(line, ')'); |
509 | if (!p) | |
7640a5de LP |
510 | return -EIO; |
511 | ||
512 | p++; | |
513 | ||
514 | if (sscanf(p, " " | |
515 | "%*c " /* state */ | |
516 | "%*d " /* ppid */ | |
517 | "%*d " /* pgrp */ | |
518 | "%*d " /* session */ | |
519 | "%*d " /* tty_nr */ | |
520 | "%*d " /* tpgid */ | |
521 | "%*u " /* flags */ | |
522 | "%*u " /* minflt */ | |
523 | "%*u " /* cminflt */ | |
524 | "%*u " /* majflt */ | |
525 | "%*u " /* cmajflt */ | |
526 | "%*u " /* utime */ | |
527 | "%*u " /* stime */ | |
528 | "%*d " /* cutime */ | |
529 | "%*d " /* cstime */ | |
530 | "%*d " /* priority */ | |
531 | "%*d " /* nice */ | |
532 | "%*d " /* num_threads */ | |
533 | "%*d " /* itrealvalue */ | |
534 | "%llu " /* starttime */, | |
535 | st) != 1) | |
536 | return -EIO; | |
537 | ||
538 | return 0; | |
539 | } | |
540 | ||
34ca941c LP |
541 | int fchmod_umask(int fd, mode_t m) { |
542 | mode_t u; | |
543 | int r; | |
544 | ||
545 | u = umask(0777); | |
546 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
547 | umask(u); | |
548 | ||
549 | return r; | |
550 | } | |
551 | ||
7072ced8 LP |
552 | char *truncate_nl(char *s) { |
553 | assert(s); | |
554 | ||
555 | s[strcspn(s, NEWLINE)] = 0; | |
556 | return s; | |
557 | } | |
558 | ||
87d2c1ff | 559 | int get_process_comm(pid_t pid, char **name) { |
49aa47c7 | 560 | const char *p; |
7072ced8 | 561 | |
7072ced8 | 562 | assert(name); |
49aa47c7 | 563 | assert(pid >= 0); |
7072ced8 | 564 | |
87d2c1ff | 565 | if (pid == 0) |
49aa47c7 LP |
566 | p = "/proc/self/comm"; |
567 | else | |
568 | p = procfs_file_alloca(pid, "comm"); | |
7072ced8 | 569 | |
49aa47c7 | 570 | return read_one_line_file(p, name); |
7072ced8 LP |
571 | } |
572 | ||
87d2c1ff | 573 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
49aa47c7 | 574 | _cleanup_fclose_ FILE *f = NULL; |
9bdbc2e2 | 575 | char *r = NULL, *k; |
49aa47c7 | 576 | const char *p; |
c59760ee | 577 | int c; |
c59760ee | 578 | |
c59760ee | 579 | assert(line); |
49aa47c7 | 580 | assert(pid >= 0); |
c59760ee | 581 | |
87d2c1ff | 582 | if (pid == 0) |
49aa47c7 LP |
583 | p = "/proc/self/cmdline"; |
584 | else | |
585 | p = procfs_file_alloca(pid, "cmdline"); | |
c59760ee | 586 | |
49aa47c7 | 587 | f = fopen(p, "re"); |
c59760ee LP |
588 | if (!f) |
589 | return -errno; | |
49aa47c7 | 590 | |
9bdbc2e2 | 591 | if (max_length == 0) { |
49aa47c7 LP |
592 | size_t len = 0, allocated = 0; |
593 | ||
9bdbc2e2 | 594 | while ((c = getc(f)) != EOF) { |
49aa47c7 LP |
595 | |
596 | if (!GREEDY_REALLOC(r, allocated, len+2)) { | |
9bdbc2e2 | 597 | free(r); |
9bdbc2e2 LN |
598 | return -ENOMEM; |
599 | } | |
49aa47c7 LP |
600 | |
601 | r[len++] = isprint(c) ? c : ' '; | |
9bdbc2e2 | 602 | } |
49aa47c7 LP |
603 | |
604 | if (len > 0) | |
605 | r[len-1] = 0; | |
606 | ||
9bdbc2e2 LN |
607 | } else { |
608 | bool space = false; | |
609 | size_t left; | |
49aa47c7 | 610 | |
9bdbc2e2 | 611 | r = new(char, max_length); |
49aa47c7 | 612 | if (!r) |
9bdbc2e2 | 613 | return -ENOMEM; |
c59760ee | 614 | |
9bdbc2e2 LN |
615 | k = r; |
616 | left = max_length; | |
617 | while ((c = getc(f)) != EOF) { | |
c59760ee | 618 | |
9bdbc2e2 LN |
619 | if (isprint(c)) { |
620 | if (space) { | |
621 | if (left <= 4) | |
622 | break; | |
623 | ||
624 | *(k++) = ' '; | |
625 | left--; | |
626 | space = false; | |
627 | } | |
c59760ee | 628 | |
c59760ee LP |
629 | if (left <= 4) |
630 | break; | |
631 | ||
9bdbc2e2 | 632 | *(k++) = (char) c; |
057fbb58 | 633 | left--; |
9bdbc2e2 LN |
634 | } else |
635 | space = true; | |
636 | } | |
c59760ee | 637 | |
9bdbc2e2 LN |
638 | if (left <= 4) { |
639 | size_t n = MIN(left-1, 3U); | |
640 | memcpy(k, "...", n); | |
641 | k[n] = 0; | |
642 | } else | |
643 | *k = 0; | |
c59760ee LP |
644 | } |
645 | ||
35d2e7ec | 646 | /* Kernel threads have no argv[] */ |
9bdbc2e2 | 647 | if (r == NULL || r[0] == 0) { |
b47d419c | 648 | _cleanup_free_ char *t = NULL; |
35d2e7ec LP |
649 | int h; |
650 | ||
651 | free(r); | |
652 | ||
87d2c1ff LP |
653 | if (!comm_fallback) |
654 | return -ENOENT; | |
655 | ||
656 | h = get_process_comm(pid, &t); | |
657 | if (h < 0) | |
35d2e7ec LP |
658 | return h; |
659 | ||
b7def684 | 660 | r = strjoin("[", t, "]", NULL); |
87d2c1ff | 661 | if (!r) |
35d2e7ec LP |
662 | return -ENOMEM; |
663 | } | |
fa776d8e | 664 | |
c59760ee LP |
665 | *line = r; |
666 | return 0; | |
667 | } | |
668 | ||
1e5678d0 | 669 | int is_kernel_thread(pid_t pid) { |
49aa47c7 | 670 | const char *p; |
1e5678d0 LP |
671 | size_t count; |
672 | char c; | |
673 | bool eof; | |
674 | FILE *f; | |
675 | ||
676 | if (pid == 0) | |
677 | return 0; | |
678 | ||
49aa47c7 | 679 | assert(pid > 0); |
1e5678d0 | 680 | |
49aa47c7 LP |
681 | p = procfs_file_alloca(pid, "cmdline"); |
682 | f = fopen(p, "re"); | |
1e5678d0 LP |
683 | if (!f) |
684 | return -errno; | |
685 | ||
686 | count = fread(&c, 1, 1, f); | |
687 | eof = feof(f); | |
688 | fclose(f); | |
689 | ||
690 | /* Kernel threads have an empty cmdline */ | |
691 | ||
692 | if (count <= 0) | |
693 | return eof ? 1 : -errno; | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
3a832116 SL |
698 | int get_process_capeff(pid_t pid, char **capeff) { |
699 | const char *p; | |
3a832116 SL |
700 | |
701 | assert(capeff); | |
702 | assert(pid >= 0); | |
703 | ||
704 | if (pid == 0) | |
705 | p = "/proc/self/status"; | |
706 | else | |
707 | p = procfs_file_alloca(pid, "status"); | |
708 | ||
69ab8088 | 709 | return get_status_field(p, "\nCapEff:", capeff); |
3a832116 | 710 | } |
49aa47c7 | 711 | |
87d2c1ff | 712 | int get_process_exe(pid_t pid, char **name) { |
49aa47c7 | 713 | const char *p; |
e79f68d1 ZJS |
714 | char *d; |
715 | int r; | |
87d2c1ff | 716 | |
49aa47c7 | 717 | assert(pid >= 0); |
87d2c1ff LP |
718 | assert(name); |
719 | ||
720 | if (pid == 0) | |
49aa47c7 LP |
721 | p = "/proc/self/exe"; |
722 | else | |
723 | p = procfs_file_alloca(pid, "exe"); | |
87d2c1ff | 724 | |
e79f68d1 ZJS |
725 | r = readlink_malloc(p, name); |
726 | if (r < 0) | |
727 | return r; | |
728 | ||
729 | d = endswith(*name, " (deleted)"); | |
730 | if (d) | |
731 | *d = '\0'; | |
732 | ||
733 | return 0; | |
87d2c1ff LP |
734 | } |
735 | ||
901c3d0d | 736 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
f74e605f | 737 | _cleanup_fclose_ FILE *f = NULL; |
9db11a99 | 738 | char line[LINE_MAX]; |
49aa47c7 | 739 | const char *p; |
7e4ab3c5 | 740 | |
f74e605f | 741 | assert(field); |
7e4ab3c5 LP |
742 | assert(uid); |
743 | ||
744 | if (pid == 0) | |
745 | return getuid(); | |
746 | ||
49aa47c7 LP |
747 | p = procfs_file_alloca(pid, "status"); |
748 | f = fopen(p, "re"); | |
7e4ab3c5 LP |
749 | if (!f) |
750 | return -errno; | |
751 | ||
9db11a99 | 752 | FOREACH_LINE(line, f, return -errno) { |
f74e605f | 753 | char *l; |
7e4ab3c5 LP |
754 | |
755 | l = strstrip(line); | |
756 | ||
901c3d0d LP |
757 | if (startswith(l, field)) { |
758 | l += strlen(field); | |
7e4ab3c5 LP |
759 | l += strspn(l, WHITESPACE); |
760 | ||
761 | l[strcspn(l, WHITESPACE)] = 0; | |
762 | ||
f74e605f | 763 | return parse_uid(l, uid); |
7e4ab3c5 LP |
764 | } |
765 | } | |
766 | ||
f74e605f | 767 | return -EIO; |
7e4ab3c5 LP |
768 | } |
769 | ||
901c3d0d LP |
770 | int get_process_uid(pid_t pid, uid_t *uid) { |
771 | return get_process_id(pid, "Uid:", uid); | |
772 | } | |
773 | ||
774 | int get_process_gid(pid_t pid, gid_t *gid) { | |
49aa47c7 | 775 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); |
901c3d0d LP |
776 | return get_process_id(pid, "Gid:", gid); |
777 | } | |
778 | ||
fab56fc5 LP |
779 | char *strnappend(const char *s, const char *suffix, size_t b) { |
780 | size_t a; | |
44d8db9e LP |
781 | char *r; |
782 | ||
fab56fc5 LP |
783 | if (!s && !suffix) |
784 | return strdup(""); | |
785 | ||
786 | if (!s) | |
787 | return strndup(suffix, b); | |
788 | ||
789 | if (!suffix) | |
790 | return strdup(s); | |
791 | ||
44d8db9e LP |
792 | assert(s); |
793 | assert(suffix); | |
794 | ||
795 | a = strlen(s); | |
aa408e77 | 796 | if (b > ((size_t) -1) - a) |
040f18ea | 797 | return NULL; |
44d8db9e | 798 | |
040f18ea LP |
799 | r = new(char, a+b+1); |
800 | if (!r) | |
44d8db9e LP |
801 | return NULL; |
802 | ||
803 | memcpy(r, s, a); | |
804 | memcpy(r+a, suffix, b); | |
805 | r[a+b] = 0; | |
806 | ||
807 | return r; | |
808 | } | |
87f0e418 | 809 | |
fab56fc5 LP |
810 | char *strappend(const char *s, const char *suffix) { |
811 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
812 | } | |
813 | ||
87f0e418 LP |
814 | int readlink_malloc(const char *p, char **r) { |
815 | size_t l = 100; | |
816 | ||
817 | assert(p); | |
818 | assert(r); | |
819 | ||
820 | for (;;) { | |
821 | char *c; | |
822 | ssize_t n; | |
823 | ||
824 | if (!(c = new(char, l))) | |
825 | return -ENOMEM; | |
826 | ||
827 | if ((n = readlink(p, c, l-1)) < 0) { | |
828 | int ret = -errno; | |
829 | free(c); | |
830 | return ret; | |
831 | } | |
832 | ||
833 | if ((size_t) n < l-1) { | |
834 | c[n] = 0; | |
835 | *r = c; | |
836 | return 0; | |
837 | } | |
838 | ||
839 | free(c); | |
840 | l *= 2; | |
841 | } | |
842 | } | |
843 | ||
2c7108c4 | 844 | int readlink_and_make_absolute(const char *p, char **r) { |
1058cbf2 ZJS |
845 | _cleanup_free_ char *target = NULL; |
846 | char *k; | |
2c7108c4 LP |
847 | int j; |
848 | ||
849 | assert(p); | |
850 | assert(r); | |
851 | ||
1058cbf2 ZJS |
852 | j = readlink_malloc(p, &target); |
853 | if (j < 0) | |
2c7108c4 LP |
854 | return j; |
855 | ||
856 | k = file_in_same_dir(p, target); | |
2c7108c4 LP |
857 | if (!k) |
858 | return -ENOMEM; | |
859 | ||
860 | *r = k; | |
861 | return 0; | |
862 | } | |
863 | ||
83096483 LP |
864 | int readlink_and_canonicalize(const char *p, char **r) { |
865 | char *t, *s; | |
866 | int j; | |
867 | ||
868 | assert(p); | |
869 | assert(r); | |
870 | ||
871 | j = readlink_and_make_absolute(p, &t); | |
872 | if (j < 0) | |
873 | return j; | |
874 | ||
875 | s = canonicalize_file_name(t); | |
876 | if (s) { | |
877 | free(t); | |
878 | *r = s; | |
879 | } else | |
880 | *r = t; | |
881 | ||
882 | path_kill_slashes(*r); | |
883 | ||
884 | return 0; | |
885 | } | |
886 | ||
2a987ee8 LP |
887 | int reset_all_signal_handlers(void) { |
888 | int sig; | |
889 | ||
890 | for (sig = 1; sig < _NSIG; sig++) { | |
b92bea5d ZJS |
891 | struct sigaction sa = { |
892 | .sa_handler = SIG_DFL, | |
893 | .sa_flags = SA_RESTART, | |
894 | }; | |
2a987ee8 LP |
895 | |
896 | if (sig == SIGKILL || sig == SIGSTOP) | |
897 | continue; | |
898 | ||
2a987ee8 LP |
899 | /* On Linux the first two RT signals are reserved by |
900 | * glibc, and sigaction() will return EINVAL for them. */ | |
901 | if ((sigaction(sig, &sa, NULL) < 0)) | |
902 | if (errno != EINVAL) | |
903 | return -errno; | |
904 | } | |
905 | ||
8e274523 | 906 | return 0; |
2a987ee8 | 907 | } |
4a72ff34 LP |
908 | |
909 | char *strstrip(char *s) { | |
57a8eca8 | 910 | char *e; |
4a72ff34 LP |
911 | |
912 | /* Drops trailing whitespace. Modifies the string in | |
913 | * place. Returns pointer to first non-space character */ | |
914 | ||
915 | s += strspn(s, WHITESPACE); | |
916 | ||
57a8eca8 LP |
917 | for (e = strchr(s, 0); e > s; e --) |
918 | if (!strchr(WHITESPACE, e[-1])) | |
919 | break; | |
4a72ff34 | 920 | |
57a8eca8 | 921 | *e = 0; |
4a72ff34 LP |
922 | |
923 | return s; | |
4a72ff34 LP |
924 | } |
925 | ||
ee9b5e01 LP |
926 | char *delete_chars(char *s, const char *bad) { |
927 | char *f, *t; | |
928 | ||
929 | /* Drops all whitespace, regardless where in the string */ | |
930 | ||
931 | for (f = s, t = s; *f; f++) { | |
932 | if (strchr(bad, *f)) | |
933 | continue; | |
934 | ||
935 | *(t++) = *f; | |
936 | } | |
937 | ||
938 | *t = 0; | |
939 | ||
940 | return s; | |
941 | } | |
942 | ||
ab1f0633 LP |
943 | bool in_charset(const char *s, const char* charset) { |
944 | const char *i; | |
945 | ||
946 | assert(s); | |
947 | assert(charset); | |
948 | ||
949 | for (i = s; *i; i++) | |
950 | if (!strchr(charset, *i)) | |
951 | return false; | |
952 | ||
953 | return true; | |
954 | } | |
955 | ||
4a72ff34 LP |
956 | char *file_in_same_dir(const char *path, const char *filename) { |
957 | char *e, *r; | |
958 | size_t k; | |
959 | ||
960 | assert(path); | |
961 | assert(filename); | |
962 | ||
963 | /* This removes the last component of path and appends | |
964 | * filename, unless the latter is absolute anyway or the | |
965 | * former isn't */ | |
966 | ||
967 | if (path_is_absolute(filename)) | |
968 | return strdup(filename); | |
969 | ||
970 | if (!(e = strrchr(path, '/'))) | |
971 | return strdup(filename); | |
972 | ||
973 | k = strlen(filename); | |
974 | if (!(r = new(char, e-path+1+k+1))) | |
975 | return NULL; | |
976 | ||
977 | memcpy(r, path, e-path+1); | |
978 | memcpy(r+(e-path)+1, filename, k+1); | |
979 | ||
980 | return r; | |
981 | } | |
fb624d04 | 982 | |
c32dd69b LP |
983 | int rmdir_parents(const char *path, const char *stop) { |
984 | size_t l; | |
985 | int r = 0; | |
986 | ||
987 | assert(path); | |
988 | assert(stop); | |
989 | ||
990 | l = strlen(path); | |
991 | ||
992 | /* Skip trailing slashes */ | |
993 | while (l > 0 && path[l-1] == '/') | |
994 | l--; | |
995 | ||
996 | while (l > 0) { | |
997 | char *t; | |
998 | ||
999 | /* Skip last component */ | |
1000 | while (l > 0 && path[l-1] != '/') | |
1001 | l--; | |
1002 | ||
1003 | /* Skip trailing slashes */ | |
1004 | while (l > 0 && path[l-1] == '/') | |
1005 | l--; | |
1006 | ||
1007 | if (l <= 0) | |
1008 | break; | |
1009 | ||
1010 | if (!(t = strndup(path, l))) | |
1011 | return -ENOMEM; | |
1012 | ||
1013 | if (path_startswith(stop, t)) { | |
1014 | free(t); | |
1015 | return 0; | |
1016 | } | |
1017 | ||
1018 | r = rmdir(t); | |
1019 | free(t); | |
1020 | ||
1021 | if (r < 0) | |
1022 | if (errno != ENOENT) | |
1023 | return -errno; | |
1024 | } | |
1025 | ||
1026 | return 0; | |
1027 | } | |
1028 | ||
fb624d04 LP |
1029 | char hexchar(int x) { |
1030 | static const char table[16] = "0123456789abcdef"; | |
1031 | ||
1032 | return table[x & 15]; | |
1033 | } | |
4fe88d28 LP |
1034 | |
1035 | int unhexchar(char c) { | |
1036 | ||
1037 | if (c >= '0' && c <= '9') | |
1038 | return c - '0'; | |
1039 | ||
1040 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1041 | return c - 'a' + 10; |
4fe88d28 LP |
1042 | |
1043 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1044 | return c - 'A' + 10; |
4fe88d28 LP |
1045 | |
1046 | return -1; | |
1047 | } | |
1048 | ||
66e35261 LP |
1049 | char *hexmem(const void *p, size_t l) { |
1050 | char *r, *z; | |
1051 | const uint8_t *x; | |
1052 | ||
1053 | z = r = malloc(l * 2 + 1); | |
1054 | if (!r) | |
1055 | return NULL; | |
1056 | ||
1057 | for (x = p; x < (const uint8_t*) p + l; x++) { | |
1058 | *(z++) = hexchar(*x >> 4); | |
1059 | *(z++) = hexchar(*x & 15); | |
1060 | } | |
1061 | ||
1062 | *z = 0; | |
1063 | return r; | |
1064 | } | |
1065 | ||
2181a7f5 LP |
1066 | void *unhexmem(const char *p, size_t l) { |
1067 | uint8_t *r, *z; | |
1068 | const char *x; | |
1069 | ||
1070 | assert(p); | |
1071 | ||
1072 | z = r = malloc((l + 1) / 2 + 1); | |
1073 | if (!r) | |
1074 | return NULL; | |
1075 | ||
1076 | for (x = p; x < p + l; x += 2) { | |
1077 | int a, b; | |
1078 | ||
1079 | a = unhexchar(x[0]); | |
1080 | if (x+1 < p + l) | |
1081 | b = unhexchar(x[1]); | |
1082 | else | |
1083 | b = 0; | |
1084 | ||
1085 | *(z++) = (uint8_t) a << 4 | (uint8_t) b; | |
1086 | } | |
1087 | ||
1088 | *z = 0; | |
1089 | return r; | |
1090 | } | |
1091 | ||
4fe88d28 LP |
1092 | char octchar(int x) { |
1093 | return '0' + (x & 7); | |
1094 | } | |
1095 | ||
1096 | int unoctchar(char c) { | |
1097 | ||
1098 | if (c >= '0' && c <= '7') | |
1099 | return c - '0'; | |
1100 | ||
1101 | return -1; | |
1102 | } | |
1103 | ||
5af98f82 LP |
1104 | char decchar(int x) { |
1105 | return '0' + (x % 10); | |
1106 | } | |
1107 | ||
1108 | int undecchar(char c) { | |
1109 | ||
1110 | if (c >= '0' && c <= '9') | |
1111 | return c - '0'; | |
1112 | ||
1113 | return -1; | |
1114 | } | |
1115 | ||
4fe88d28 LP |
1116 | char *cescape(const char *s) { |
1117 | char *r, *t; | |
1118 | const char *f; | |
1119 | ||
1120 | assert(s); | |
1121 | ||
1122 | /* Does C style string escaping. */ | |
1123 | ||
f8e2fb7b LP |
1124 | r = new(char, strlen(s)*4 + 1); |
1125 | if (!r) | |
4fe88d28 LP |
1126 | return NULL; |
1127 | ||
1128 | for (f = s, t = r; *f; f++) | |
1129 | ||
1130 | switch (*f) { | |
1131 | ||
1132 | case '\a': | |
1133 | *(t++) = '\\'; | |
1134 | *(t++) = 'a'; | |
1135 | break; | |
1136 | case '\b': | |
1137 | *(t++) = '\\'; | |
1138 | *(t++) = 'b'; | |
1139 | break; | |
1140 | case '\f': | |
1141 | *(t++) = '\\'; | |
1142 | *(t++) = 'f'; | |
1143 | break; | |
1144 | case '\n': | |
1145 | *(t++) = '\\'; | |
1146 | *(t++) = 'n'; | |
1147 | break; | |
1148 | case '\r': | |
1149 | *(t++) = '\\'; | |
1150 | *(t++) = 'r'; | |
1151 | break; | |
1152 | case '\t': | |
1153 | *(t++) = '\\'; | |
1154 | *(t++) = 't'; | |
1155 | break; | |
1156 | case '\v': | |
1157 | *(t++) = '\\'; | |
1158 | *(t++) = 'v'; | |
1159 | break; | |
1160 | case '\\': | |
1161 | *(t++) = '\\'; | |
1162 | *(t++) = '\\'; | |
1163 | break; | |
1164 | case '"': | |
1165 | *(t++) = '\\'; | |
1166 | *(t++) = '"'; | |
1167 | break; | |
1168 | case '\'': | |
1169 | *(t++) = '\\'; | |
1170 | *(t++) = '\''; | |
1171 | break; | |
1172 | ||
1173 | default: | |
1174 | /* For special chars we prefer octal over | |
1175 | * hexadecimal encoding, simply because glib's | |
1176 | * g_strescape() does the same */ | |
1177 | if ((*f < ' ') || (*f >= 127)) { | |
1178 | *(t++) = '\\'; | |
1179 | *(t++) = octchar((unsigned char) *f >> 6); | |
1180 | *(t++) = octchar((unsigned char) *f >> 3); | |
1181 | *(t++) = octchar((unsigned char) *f); | |
1182 | } else | |
1183 | *(t++) = *f; | |
1184 | break; | |
1185 | } | |
1186 | ||
1187 | *t = 0; | |
1188 | ||
1189 | return r; | |
1190 | } | |
1191 | ||
5b4c61cd | 1192 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1193 | char *r, *t; |
1194 | const char *f; | |
5b4c61cd | 1195 | size_t pl; |
4fe88d28 LP |
1196 | |
1197 | assert(s); | |
1198 | ||
5b4c61cd LP |
1199 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1200 | ||
1201 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1202 | |
5b4c61cd | 1203 | r = new(char, pl+length+1); |
7f110ff9 | 1204 | if (!r) |
4fe88d28 LP |
1205 | return r; |
1206 | ||
5b4c61cd LP |
1207 | if (prefix) |
1208 | memcpy(r, prefix, pl); | |
1209 | ||
1210 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1211 | |
1212 | if (*f != '\\') { | |
1213 | *(t++) = *f; | |
1214 | continue; | |
1215 | } | |
1216 | ||
1217 | f++; | |
1218 | ||
1219 | switch (*f) { | |
1220 | ||
1221 | case 'a': | |
1222 | *(t++) = '\a'; | |
1223 | break; | |
1224 | case 'b': | |
1225 | *(t++) = '\b'; | |
1226 | break; | |
1227 | case 'f': | |
1228 | *(t++) = '\f'; | |
1229 | break; | |
1230 | case 'n': | |
1231 | *(t++) = '\n'; | |
1232 | break; | |
1233 | case 'r': | |
1234 | *(t++) = '\r'; | |
1235 | break; | |
1236 | case 't': | |
1237 | *(t++) = '\t'; | |
1238 | break; | |
1239 | case 'v': | |
1240 | *(t++) = '\v'; | |
1241 | break; | |
1242 | case '\\': | |
1243 | *(t++) = '\\'; | |
1244 | break; | |
1245 | case '"': | |
1246 | *(t++) = '"'; | |
1247 | break; | |
1248 | case '\'': | |
1249 | *(t++) = '\''; | |
1250 | break; | |
1251 | ||
e167fb86 LP |
1252 | case 's': |
1253 | /* This is an extension of the XDG syntax files */ | |
1254 | *(t++) = ' '; | |
1255 | break; | |
1256 | ||
4fe88d28 LP |
1257 | case 'x': { |
1258 | /* hexadecimal encoding */ | |
1259 | int a, b; | |
1260 | ||
7f110ff9 LP |
1261 | a = unhexchar(f[1]); |
1262 | b = unhexchar(f[2]); | |
1263 | ||
1264 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1265 | /* Invalid escape code, let's take it literal then */ |
1266 | *(t++) = '\\'; | |
1267 | *(t++) = 'x'; | |
1268 | } else { | |
1269 | *(t++) = (char) ((a << 4) | b); | |
1270 | f += 2; | |
1271 | } | |
1272 | ||
1273 | break; | |
1274 | } | |
1275 | ||
1276 | case '0': | |
1277 | case '1': | |
1278 | case '2': | |
1279 | case '3': | |
1280 | case '4': | |
1281 | case '5': | |
1282 | case '6': | |
1283 | case '7': { | |
1284 | /* octal encoding */ | |
1285 | int a, b, c; | |
1286 | ||
7f110ff9 LP |
1287 | a = unoctchar(f[0]); |
1288 | b = unoctchar(f[1]); | |
1289 | c = unoctchar(f[2]); | |
1290 | ||
1291 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1292 | /* Invalid escape code, let's take it literal then */ |
1293 | *(t++) = '\\'; | |
1294 | *(t++) = f[0]; | |
1295 | } else { | |
1296 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1297 | f += 2; | |
1298 | } | |
1299 | ||
1300 | break; | |
1301 | } | |
1302 | ||
1303 | case 0: | |
1304 | /* premature end of string.*/ | |
1305 | *(t++) = '\\'; | |
1306 | goto finish; | |
1307 | ||
1308 | default: | |
1309 | /* Invalid escape code, let's take it literal then */ | |
1310 | *(t++) = '\\'; | |
f3d4cc01 | 1311 | *(t++) = *f; |
4fe88d28 LP |
1312 | break; |
1313 | } | |
1314 | } | |
1315 | ||
1316 | finish: | |
1317 | *t = 0; | |
1318 | return r; | |
1319 | } | |
1320 | ||
5b4c61cd LP |
1321 | char *cunescape_length(const char *s, size_t length) { |
1322 | return cunescape_length_with_prefix(s, length, NULL); | |
1323 | } | |
1324 | ||
6febfd0d | 1325 | char *cunescape(const char *s) { |
5b4c61cd LP |
1326 | assert(s); |
1327 | ||
6febfd0d LP |
1328 | return cunescape_length(s, strlen(s)); |
1329 | } | |
4fe88d28 LP |
1330 | |
1331 | char *xescape(const char *s, const char *bad) { | |
1332 | char *r, *t; | |
1333 | const char *f; | |
1334 | ||
1335 | /* Escapes all chars in bad, in addition to \ and all special | |
1336 | * chars, in \xFF style escaping. May be reversed with | |
1337 | * cunescape. */ | |
1338 | ||
08ace05b LP |
1339 | r = new(char, strlen(s) * 4 + 1); |
1340 | if (!r) | |
4fe88d28 LP |
1341 | return NULL; |
1342 | ||
1343 | for (f = s, t = r; *f; f++) { | |
1344 | ||
b866264a LP |
1345 | if ((*f < ' ') || (*f >= 127) || |
1346 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1347 | *(t++) = '\\'; |
1348 | *(t++) = 'x'; | |
1349 | *(t++) = hexchar(*f >> 4); | |
1350 | *(t++) = hexchar(*f); | |
1351 | } else | |
1352 | *(t++) = *f; | |
1353 | } | |
1354 | ||
1355 | *t = 0; | |
1356 | ||
1357 | return r; | |
1358 | } | |
1359 | ||
ea430986 | 1360 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1361 | char *r, *t; |
1362 | const char *f; | |
1363 | ||
47be870b LP |
1364 | assert(s); |
1365 | ||
ea430986 | 1366 | /* Escapes all chars that D-Bus' object path cannot deal |
7d9cb422 | 1367 | * with. Can be reversed with bus_path_unescape(). We special |
d47c78be | 1368 | * case the empty string. */ |
ea430986 | 1369 | |
d47c78be LP |
1370 | if (*s == 0) |
1371 | return strdup("_"); | |
1372 | ||
1373 | r = new(char, strlen(s)*3 + 1); | |
1374 | if (!r) | |
ea430986 LP |
1375 | return NULL; |
1376 | ||
1377 | for (f = s, t = r; *f; f++) { | |
1378 | ||
d47c78be LP |
1379 | /* Escape everything that is not a-zA-Z0-9. We also |
1380 | * escape 0-9 if it's the first character */ | |
1381 | ||
ea430986 LP |
1382 | if (!(*f >= 'A' && *f <= 'Z') && |
1383 | !(*f >= 'a' && *f <= 'z') && | |
d47c78be | 1384 | !(f > s && *f >= '0' && *f <= '9')) { |
ea430986 LP |
1385 | *(t++) = '_'; |
1386 | *(t++) = hexchar(*f >> 4); | |
1387 | *(t++) = hexchar(*f); | |
1388 | } else | |
1389 | *(t++) = *f; | |
1390 | } | |
1391 | ||
1392 | *t = 0; | |
1393 | ||
1394 | return r; | |
1395 | } | |
1396 | ||
9e2f7c11 | 1397 | char *bus_path_unescape(const char *f) { |
ea430986 | 1398 | char *r, *t; |
ea430986 | 1399 | |
9e2f7c11 | 1400 | assert(f); |
47be870b | 1401 | |
d47c78be LP |
1402 | /* Special case for the empty string */ |
1403 | if (streq(f, "_")) | |
1404 | return strdup(""); | |
1405 | ||
1406 | r = new(char, strlen(f) + 1); | |
1407 | if (!r) | |
ea430986 LP |
1408 | return NULL; |
1409 | ||
9e2f7c11 | 1410 | for (t = r; *f; f++) { |
ea430986 LP |
1411 | |
1412 | if (*f == '_') { | |
1413 | int a, b; | |
1414 | ||
1415 | if ((a = unhexchar(f[1])) < 0 || | |
1416 | (b = unhexchar(f[2])) < 0) { | |
1417 | /* Invalid escape code, let's take it literal then */ | |
1418 | *(t++) = '_'; | |
1419 | } else { | |
1420 | *(t++) = (char) ((a << 4) | b); | |
1421 | f += 2; | |
1422 | } | |
1423 | } else | |
1424 | *(t++) = *f; | |
1425 | } | |
1426 | ||
1427 | *t = 0; | |
1428 | ||
1429 | return r; | |
1430 | } | |
1431 | ||
67d51650 | 1432 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1433 | char *p; |
1434 | ||
67d51650 | 1435 | assert(t); |
4fe88d28 | 1436 | |
67d51650 | 1437 | for (p = t; *p; p++) |
4fe88d28 LP |
1438 | if (*p >= 'A' && *p <= 'Z') |
1439 | *p = *p - 'A' + 'a'; | |
1440 | ||
67d51650 | 1441 | return t; |
4fe88d28 | 1442 | } |
1dccbe19 | 1443 | |
44a6b1b6 | 1444 | _pure_ static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1445 | assert(filename); |
1446 | ||
1447 | return | |
1448 | filename[0] == '.' || | |
6c78be3c | 1449 | streq(filename, "lost+found") || |
e472d476 LP |
1450 | streq(filename, "aquota.user") || |
1451 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1452 | endswith(filename, ".rpmnew") || |
1453 | endswith(filename, ".rpmsave") || | |
1454 | endswith(filename, ".rpmorig") || | |
1455 | endswith(filename, ".dpkg-old") || | |
1456 | endswith(filename, ".dpkg-new") || | |
1457 | endswith(filename, ".swp"); | |
1458 | } | |
1459 | ||
a228a22f LP |
1460 | bool ignore_file(const char *filename) { |
1461 | assert(filename); | |
1462 | ||
1463 | if (endswith(filename, "~")) | |
1464 | return false; | |
1465 | ||
1466 | return ignore_file_allow_backup(filename); | |
1467 | } | |
1468 | ||
3a0ecb08 LP |
1469 | int fd_nonblock(int fd, bool nonblock) { |
1470 | int flags; | |
1471 | ||
1472 | assert(fd >= 0); | |
1473 | ||
1474 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1475 | return -errno; | |
1476 | ||
1477 | if (nonblock) | |
1478 | flags |= O_NONBLOCK; | |
1479 | else | |
1480 | flags &= ~O_NONBLOCK; | |
1481 | ||
1482 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1483 | return -errno; | |
1484 | ||
1485 | return 0; | |
1486 | } | |
1487 | ||
1488 | int fd_cloexec(int fd, bool cloexec) { | |
1489 | int flags; | |
1490 | ||
1491 | assert(fd >= 0); | |
1492 | ||
1493 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1494 | return -errno; | |
1495 | ||
1496 | if (cloexec) | |
1497 | flags |= FD_CLOEXEC; | |
1498 | else | |
1499 | flags &= ~FD_CLOEXEC; | |
1500 | ||
1501 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1502 | return -errno; | |
1503 | ||
1504 | return 0; | |
1505 | } | |
1506 | ||
44a6b1b6 | 1507 | _pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
b19be9eb LP |
1508 | unsigned i; |
1509 | ||
1510 | assert(n_fdset == 0 || fdset); | |
1511 | ||
1512 | for (i = 0; i < n_fdset; i++) | |
1513 | if (fdset[i] == fd) | |
1514 | return true; | |
1515 | ||
1516 | return false; | |
1517 | } | |
1518 | ||
a0d40ac5 LP |
1519 | int close_all_fds(const int except[], unsigned n_except) { |
1520 | DIR *d; | |
1521 | struct dirent *de; | |
1522 | int r = 0; | |
1523 | ||
b19be9eb LP |
1524 | assert(n_except == 0 || except); |
1525 | ||
1526 | d = opendir("/proc/self/fd"); | |
1527 | if (!d) { | |
1528 | int fd; | |
1529 | struct rlimit rl; | |
1530 | ||
1531 | /* When /proc isn't available (for example in chroots) | |
1532 | * the fallback is brute forcing through the fd | |
1533 | * table */ | |
1534 | ||
1535 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1536 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1537 | ||
1538 | if (fd_in_set(fd, except, n_except)) | |
1539 | continue; | |
1540 | ||
1541 | if (close_nointr(fd) < 0) | |
1542 | if (errno != EBADF && r == 0) | |
1543 | r = -errno; | |
1544 | } | |
1545 | ||
1546 | return r; | |
1547 | } | |
a0d40ac5 LP |
1548 | |
1549 | while ((de = readdir(d))) { | |
a7610064 | 1550 | int fd = -1; |
a0d40ac5 | 1551 | |
a16e1123 | 1552 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1553 | continue; |
1554 | ||
720ce21d LP |
1555 | if (safe_atoi(de->d_name, &fd) < 0) |
1556 | /* Let's better ignore this, just in case */ | |
1557 | continue; | |
a0d40ac5 LP |
1558 | |
1559 | if (fd < 3) | |
1560 | continue; | |
1561 | ||
1562 | if (fd == dirfd(d)) | |
1563 | continue; | |
1564 | ||
b19be9eb LP |
1565 | if (fd_in_set(fd, except, n_except)) |
1566 | continue; | |
a0d40ac5 | 1567 | |
720ce21d | 1568 | if (close_nointr(fd) < 0) { |
2f357920 | 1569 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1570 | if (errno != EBADF && r == 0) |
1571 | r = -errno; | |
2f357920 | 1572 | } |
a0d40ac5 LP |
1573 | } |
1574 | ||
a0d40ac5 LP |
1575 | closedir(d); |
1576 | return r; | |
1577 | } | |
1578 | ||
db12775d LP |
1579 | bool chars_intersect(const char *a, const char *b) { |
1580 | const char *p; | |
1581 | ||
1582 | /* Returns true if any of the chars in a are in b. */ | |
1583 | for (p = a; *p; p++) | |
1584 | if (strchr(b, *p)) | |
1585 | return true; | |
1586 | ||
1587 | return false; | |
1588 | } | |
1589 | ||
42856c10 | 1590 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
1591 | static const char table[] = |
1592 | "cifs\0" | |
1593 | "smbfs\0" | |
1594 | "ncpfs\0" | |
dac70dc7 | 1595 | "ncp\0" |
a05f97b3 LP |
1596 | "nfs\0" |
1597 | "nfs4\0" | |
1598 | "gfs\0" | |
73836c5c | 1599 | "gfs2\0"; |
42856c10 | 1600 | |
a05f97b3 | 1601 | return nulstr_contains(table, fstype); |
42856c10 LP |
1602 | } |
1603 | ||
601f6a1e | 1604 | int chvt(int vt) { |
a05f97b3 | 1605 | _cleanup_close_ int fd; |
601f6a1e | 1606 | |
a05f97b3 LP |
1607 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1608 | if (fd < 0) | |
601f6a1e LP |
1609 | return -errno; |
1610 | ||
1611 | if (vt < 0) { | |
1612 | int tiocl[2] = { | |
1613 | TIOCL_GETKMSGREDIRECT, | |
1614 | 0 | |
1615 | }; | |
1616 | ||
a05f97b3 LP |
1617 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1618 | return -errno; | |
601f6a1e LP |
1619 | |
1620 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1621 | } | |
1622 | ||
1623 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1624 | return -errno; |
601f6a1e | 1625 | |
a05f97b3 | 1626 | return 0; |
601f6a1e LP |
1627 | } |
1628 | ||
8f2d43a0 | 1629 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
1630 | struct termios old_termios, new_termios; |
1631 | char c; | |
20c03b7b | 1632 | char line[LINE_MAX]; |
80876c20 LP |
1633 | |
1634 | assert(f); | |
1635 | assert(ret); | |
1636 | ||
1637 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1638 | new_termios = old_termios; | |
1639 | ||
1640 | new_termios.c_lflag &= ~ICANON; | |
1641 | new_termios.c_cc[VMIN] = 1; | |
1642 | new_termios.c_cc[VTIME] = 0; | |
1643 | ||
1644 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1645 | size_t k; | |
1646 | ||
8f2d43a0 LP |
1647 | if (t != (usec_t) -1) { |
1648 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
1649 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1650 | return -ETIMEDOUT; | |
1651 | } | |
1652 | } | |
1653 | ||
80876c20 LP |
1654 | k = fread(&c, 1, 1, f); |
1655 | ||
1656 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1657 | ||
1658 | if (k <= 0) | |
1659 | return -EIO; | |
1660 | ||
1661 | if (need_nl) | |
1662 | *need_nl = c != '\n'; | |
1663 | ||
1664 | *ret = c; | |
1665 | return 0; | |
1666 | } | |
1667 | } | |
1668 | ||
8f2d43a0 LP |
1669 | if (t != (usec_t) -1) |
1670 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
1671 | return -ETIMEDOUT; | |
1672 | ||
1673 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
1674 | return -EIO; |
1675 | ||
1676 | truncate_nl(line); | |
1677 | ||
1678 | if (strlen(line) != 1) | |
1679 | return -EBADMSG; | |
1680 | ||
1681 | if (need_nl) | |
1682 | *need_nl = false; | |
1683 | ||
1684 | *ret = line[0]; | |
1685 | return 0; | |
1686 | } | |
1687 | ||
1688 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 | 1689 | |
80876c20 LP |
1690 | assert(ret); |
1691 | assert(replies); | |
1692 | assert(text); | |
1693 | ||
1694 | for (;;) { | |
1695 | va_list ap; | |
1696 | char c; | |
1697 | int r; | |
1698 | bool need_nl = true; | |
1699 | ||
8481248b | 1700 | if (on_tty()) |
c1072ea0 | 1701 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1702 | |
80876c20 LP |
1703 | va_start(ap, text); |
1704 | vprintf(text, ap); | |
1705 | va_end(ap); | |
1706 | ||
8481248b | 1707 | if (on_tty()) |
c1072ea0 | 1708 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1709 | |
80876c20 LP |
1710 | fflush(stdout); |
1711 | ||
8f2d43a0 LP |
1712 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
1713 | if (r < 0) { | |
80876c20 LP |
1714 | |
1715 | if (r == -EBADMSG) { | |
1716 | puts("Bad input, please try again."); | |
1717 | continue; | |
1718 | } | |
1719 | ||
1720 | putchar('\n'); | |
1721 | return r; | |
1722 | } | |
1723 | ||
1724 | if (need_nl) | |
1725 | putchar('\n'); | |
1726 | ||
1727 | if (strchr(replies, c)) { | |
1728 | *ret = c; | |
1729 | return 0; | |
1730 | } | |
1731 | ||
1732 | puts("Read unexpected character, please try again."); | |
1733 | } | |
1734 | } | |
1735 | ||
512947d4 | 1736 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
1737 | struct termios termios; |
1738 | int r = 0; | |
3fe5e5d4 LP |
1739 | |
1740 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
1741 | |
1742 | assert(fd >= 0); | |
1743 | ||
eed1d0e3 LP |
1744 | /* We leave locked terminal attributes untouched, so that |
1745 | * Plymouth may set whatever it wants to set, and we don't | |
1746 | * interfere with that. */ | |
3fe5e5d4 LP |
1747 | |
1748 | /* Disable exclusive mode, just in case */ | |
1749 | ioctl(fd, TIOCNXCL); | |
1750 | ||
5c0100a5 | 1751 | /* Switch to text mode */ |
512947d4 MS |
1752 | if (switch_to_text) |
1753 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 1754 | |
3fe5e5d4 | 1755 | /* Enable console unicode mode */ |
df465b3f | 1756 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
1757 | |
1758 | if (tcgetattr(fd, &termios) < 0) { | |
1759 | r = -errno; | |
1760 | goto finish; | |
1761 | } | |
1762 | ||
aaf694ca LP |
1763 | /* We only reset the stuff that matters to the software. How |
1764 | * hardware is set up we don't touch assuming that somebody | |
1765 | * else will do that for us */ | |
1766 | ||
1767 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
1768 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
1769 | termios.c_oflag |= ONLCR; | |
1770 | termios.c_cflag |= CREAD; | |
1771 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
1772 | ||
1773 | termios.c_cc[VINTR] = 03; /* ^C */ | |
1774 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
1775 | termios.c_cc[VERASE] = 0177; | |
1776 | termios.c_cc[VKILL] = 025; /* ^X */ | |
1777 | termios.c_cc[VEOF] = 04; /* ^D */ | |
1778 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
1779 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
1780 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
1781 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
1782 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
1783 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
1784 | termios.c_cc[VEOL] = 0; |
1785 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
1786 | |
1787 | termios.c_cc[VTIME] = 0; | |
1788 | termios.c_cc[VMIN] = 1; | |
1789 | ||
1790 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
1791 | r = -errno; | |
1792 | ||
1793 | finish: | |
1794 | /* Just in case, flush all crap out */ | |
1795 | tcflush(fd, TCIOFLUSH); | |
1796 | ||
1797 | return r; | |
1798 | } | |
1799 | ||
6ea832a2 LP |
1800 | int reset_terminal(const char *name) { |
1801 | int fd, r; | |
1802 | ||
1803 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
1804 | if (fd < 0) | |
1805 | return fd; | |
1806 | ||
512947d4 | 1807 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
1808 | close_nointr_nofail(fd); |
1809 | ||
1810 | return r; | |
1811 | } | |
1812 | ||
80876c20 LP |
1813 | int open_terminal(const char *name, int mode) { |
1814 | int fd, r; | |
f73f76ac | 1815 | unsigned c = 0; |
80876c20 | 1816 | |
f73f76ac LP |
1817 | /* |
1818 | * If a TTY is in the process of being closed opening it might | |
1819 | * cause EIO. This is horribly awful, but unlikely to be | |
1820 | * changed in the kernel. Hence we work around this problem by | |
1821 | * retrying a couple of times. | |
1822 | * | |
1823 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
1824 | */ | |
1825 | ||
dd94c17e LP |
1826 | assert(!(mode & O_CREAT)); |
1827 | ||
f73f76ac | 1828 | for (;;) { |
dd94c17e | 1829 | fd = open(name, mode, 0); |
af6da548 | 1830 | if (fd >= 0) |
f73f76ac LP |
1831 | break; |
1832 | ||
1833 | if (errno != EIO) | |
1834 | return -errno; | |
1835 | ||
af6da548 | 1836 | /* Max 1s in total */ |
f73f76ac LP |
1837 | if (c >= 20) |
1838 | return -errno; | |
1839 | ||
1840 | usleep(50 * USEC_PER_MSEC); | |
1841 | c++; | |
1842 | } | |
1843 | ||
1844 | if (fd < 0) | |
80876c20 LP |
1845 | return -errno; |
1846 | ||
af6da548 LP |
1847 | r = isatty(fd); |
1848 | if (r < 0) { | |
80876c20 LP |
1849 | close_nointr_nofail(fd); |
1850 | return -errno; | |
1851 | } | |
1852 | ||
1853 | if (!r) { | |
1854 | close_nointr_nofail(fd); | |
1855 | return -ENOTTY; | |
1856 | } | |
1857 | ||
1858 | return fd; | |
1859 | } | |
1860 | ||
1861 | int flush_fd(int fd) { | |
b92bea5d ZJS |
1862 | struct pollfd pollfd = { |
1863 | .fd = fd, | |
1864 | .events = POLLIN, | |
1865 | }; | |
80876c20 LP |
1866 | |
1867 | for (;;) { | |
20c03b7b | 1868 | char buf[LINE_MAX]; |
80876c20 LP |
1869 | ssize_t l; |
1870 | int r; | |
1871 | ||
e62d8c39 ZJS |
1872 | r = poll(&pollfd, 1, 0); |
1873 | if (r < 0) { | |
80876c20 LP |
1874 | if (errno == EINTR) |
1875 | continue; | |
1876 | ||
1877 | return -errno; | |
80876c20 | 1878 | |
e62d8c39 | 1879 | } else if (r == 0) |
80876c20 LP |
1880 | return 0; |
1881 | ||
e62d8c39 ZJS |
1882 | l = read(fd, buf, sizeof(buf)); |
1883 | if (l < 0) { | |
80876c20 LP |
1884 | |
1885 | if (errno == EINTR) | |
1886 | continue; | |
1887 | ||
1888 | if (errno == EAGAIN) | |
1889 | return 0; | |
1890 | ||
1891 | return -errno; | |
e62d8c39 | 1892 | } else if (l == 0) |
80876c20 LP |
1893 | return 0; |
1894 | } | |
1895 | } | |
1896 | ||
af6da548 LP |
1897 | int acquire_terminal( |
1898 | const char *name, | |
1899 | bool fail, | |
1900 | bool force, | |
1901 | bool ignore_tiocstty_eperm, | |
1902 | usec_t timeout) { | |
1903 | ||
4a0ff478 | 1904 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 1905 | usec_t ts = 0; |
80876c20 LP |
1906 | |
1907 | assert(name); | |
1908 | ||
1909 | /* We use inotify to be notified when the tty is closed. We | |
1910 | * create the watch before checking if we can actually acquire | |
1911 | * it, so that we don't lose any event. | |
1912 | * | |
1913 | * Note: strictly speaking this actually watches for the | |
1914 | * device being closed, it does *not* really watch whether a | |
1915 | * tty loses its controlling process. However, unless some | |
1916 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
1917 | * its tty otherwise this will not become a problem. As long | |
1918 | * as the administrator makes sure not configure any service | |
1919 | * on the same tty as an untrusted user this should not be a | |
1920 | * problem. (Which he probably should not do anyway.) */ | |
1921 | ||
af6da548 LP |
1922 | if (timeout != (usec_t) -1) |
1923 | ts = now(CLOCK_MONOTONIC); | |
1924 | ||
80876c20 | 1925 | if (!fail && !force) { |
af6da548 LP |
1926 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
1927 | if (notify < 0) { | |
80876c20 LP |
1928 | r = -errno; |
1929 | goto fail; | |
1930 | } | |
1931 | ||
af6da548 LP |
1932 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
1933 | if (wd < 0) { | |
80876c20 LP |
1934 | r = -errno; |
1935 | goto fail; | |
1936 | } | |
1937 | } | |
1938 | ||
1939 | for (;;) { | |
b92bea5d ZJS |
1940 | struct sigaction sa_old, sa_new = { |
1941 | .sa_handler = SIG_IGN, | |
1942 | .sa_flags = SA_RESTART, | |
1943 | }; | |
1944 | ||
af6da548 LP |
1945 | if (notify >= 0) { |
1946 | r = flush_fd(notify); | |
1947 | if (r < 0) | |
e3d1855b | 1948 | goto fail; |
af6da548 | 1949 | } |
80876c20 LP |
1950 | |
1951 | /* We pass here O_NOCTTY only so that we can check the return | |
1952 | * value TIOCSCTTY and have a reliable way to figure out if we | |
1953 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
1954 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
1955 | if (fd < 0) | |
6ea832a2 | 1956 | return fd; |
80876c20 | 1957 | |
32c4bef8 LP |
1958 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1959 | * if we already own the tty. */ | |
32c4bef8 LP |
1960 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
1961 | ||
80876c20 | 1962 | /* First, try to get the tty */ |
32c4bef8 LP |
1963 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
1964 | r = -errno; | |
1965 | ||
1966 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
1967 | |
1968 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
1969 | * returning EPERM, i.e. when very likely we already | |
1970 | * are have this controlling terminal. */ | |
32c4bef8 | 1971 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
1972 | r = 0; |
1973 | ||
32c4bef8 | 1974 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
1975 | goto fail; |
1976 | } | |
1977 | ||
1978 | if (r >= 0) | |
1979 | break; | |
1980 | ||
1981 | assert(!fail); | |
1982 | assert(!force); | |
1983 | assert(notify >= 0); | |
1984 | ||
1985 | for (;;) { | |
f601daa7 | 1986 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 1987 | ssize_t l; |
f601daa7 | 1988 | struct inotify_event *e; |
80876c20 | 1989 | |
af6da548 LP |
1990 | if (timeout != (usec_t) -1) { |
1991 | usec_t n; | |
1992 | ||
1993 | n = now(CLOCK_MONOTONIC); | |
1994 | if (ts + timeout < n) { | |
1995 | r = -ETIMEDOUT; | |
1996 | goto fail; | |
1997 | } | |
1998 | ||
1999 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
2000 | if (r < 0) | |
2001 | goto fail; | |
2002 | ||
2003 | if (r == 0) { | |
2004 | r = -ETIMEDOUT; | |
2005 | goto fail; | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
2010 | if (l < 0) { | |
80876c20 | 2011 | |
af6da548 | 2012 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
2013 | continue; |
2014 | ||
2015 | r = -errno; | |
2016 | goto fail; | |
2017 | } | |
2018 | ||
2019 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2020 | |
f601daa7 LP |
2021 | while (l > 0) { |
2022 | size_t step; | |
80876c20 | 2023 | |
f601daa7 | 2024 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2025 | r = -EIO; |
f601daa7 LP |
2026 | goto fail; |
2027 | } | |
80876c20 | 2028 | |
f601daa7 LP |
2029 | step = sizeof(struct inotify_event) + e->len; |
2030 | assert(step <= (size_t) l); | |
80876c20 | 2031 | |
f601daa7 LP |
2032 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2033 | l -= step; | |
80876c20 LP |
2034 | } |
2035 | ||
2036 | break; | |
2037 | } | |
2038 | ||
2039 | /* We close the tty fd here since if the old session | |
2040 | * ended our handle will be dead. It's important that | |
2041 | * we do this after sleeping, so that we don't enter | |
2042 | * an endless loop. */ | |
2043 | close_nointr_nofail(fd); | |
2044 | } | |
2045 | ||
2046 | if (notify >= 0) | |
a16e1123 | 2047 | close_nointr_nofail(notify); |
80876c20 | 2048 | |
512947d4 MS |
2049 | r = reset_terminal_fd(fd, true); |
2050 | if (r < 0) | |
80876c20 LP |
2051 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2052 | ||
2053 | return fd; | |
2054 | ||
2055 | fail: | |
2056 | if (fd >= 0) | |
a16e1123 | 2057 | close_nointr_nofail(fd); |
80876c20 LP |
2058 | |
2059 | if (notify >= 0) | |
a16e1123 | 2060 | close_nointr_nofail(notify); |
80876c20 LP |
2061 | |
2062 | return r; | |
2063 | } | |
2064 | ||
2065 | int release_terminal(void) { | |
e62d8c39 | 2066 | int r = 0; |
b92bea5d ZJS |
2067 | struct sigaction sa_old, sa_new = { |
2068 | .sa_handler = SIG_IGN, | |
2069 | .sa_flags = SA_RESTART, | |
2070 | }; | |
7fd1b19b | 2071 | _cleanup_close_ int fd; |
80876c20 | 2072 | |
e62d8c39 ZJS |
2073 | fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC); |
2074 | if (fd < 0) | |
80876c20 LP |
2075 | return -errno; |
2076 | ||
57cd2192 LP |
2077 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2078 | * by our own TIOCNOTTY */ | |
57cd2192 LP |
2079 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
2080 | ||
80876c20 LP |
2081 | if (ioctl(fd, TIOCNOTTY) < 0) |
2082 | r = -errno; | |
2083 | ||
57cd2192 LP |
2084 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2085 | ||
80876c20 LP |
2086 | return r; |
2087 | } | |
2088 | ||
9a34ec5f LP |
2089 | int sigaction_many(const struct sigaction *sa, ...) { |
2090 | va_list ap; | |
2091 | int r = 0, sig; | |
2092 | ||
2093 | va_start(ap, sa); | |
2094 | while ((sig = va_arg(ap, int)) > 0) | |
2095 | if (sigaction(sig, sa, NULL) < 0) | |
2096 | r = -errno; | |
2097 | va_end(ap); | |
2098 | ||
2099 | return r; | |
2100 | } | |
2101 | ||
2102 | int ignore_signals(int sig, ...) { | |
b92bea5d ZJS |
2103 | struct sigaction sa = { |
2104 | .sa_handler = SIG_IGN, | |
2105 | .sa_flags = SA_RESTART, | |
2106 | }; | |
9a34ec5f LP |
2107 | va_list ap; |
2108 | int r = 0; | |
a337c6fc | 2109 | |
a337c6fc | 2110 | |
9a34ec5f LP |
2111 | if (sigaction(sig, &sa, NULL) < 0) |
2112 | r = -errno; | |
2113 | ||
2114 | va_start(ap, sig); | |
2115 | while ((sig = va_arg(ap, int)) > 0) | |
2116 | if (sigaction(sig, &sa, NULL) < 0) | |
2117 | r = -errno; | |
2118 | va_end(ap); | |
2119 | ||
2120 | return r; | |
2121 | } | |
2122 | ||
2123 | int default_signals(int sig, ...) { | |
b92bea5d ZJS |
2124 | struct sigaction sa = { |
2125 | .sa_handler = SIG_DFL, | |
2126 | .sa_flags = SA_RESTART, | |
2127 | }; | |
9a34ec5f LP |
2128 | va_list ap; |
2129 | int r = 0; | |
2130 | ||
9a34ec5f LP |
2131 | if (sigaction(sig, &sa, NULL) < 0) |
2132 | r = -errno; | |
2133 | ||
2134 | va_start(ap, sig); | |
2135 | while ((sig = va_arg(ap, int)) > 0) | |
2136 | if (sigaction(sig, &sa, NULL) < 0) | |
2137 | r = -errno; | |
2138 | va_end(ap); | |
2139 | ||
2140 | return r; | |
a337c6fc LP |
2141 | } |
2142 | ||
8d567588 LP |
2143 | int close_pipe(int p[]) { |
2144 | int a = 0, b = 0; | |
2145 | ||
2146 | assert(p); | |
2147 | ||
2148 | if (p[0] >= 0) { | |
2149 | a = close_nointr(p[0]); | |
2150 | p[0] = -1; | |
2151 | } | |
2152 | ||
2153 | if (p[1] >= 0) { | |
2154 | b = close_nointr(p[1]); | |
2155 | p[1] = -1; | |
2156 | } | |
2157 | ||
2158 | return a < 0 ? a : b; | |
2159 | } | |
2160 | ||
eb22ac37 | 2161 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2162 | uint8_t *p; |
2163 | ssize_t n = 0; | |
2164 | ||
2165 | assert(fd >= 0); | |
2166 | assert(buf); | |
2167 | ||
2168 | p = buf; | |
2169 | ||
2170 | while (nbytes > 0) { | |
2171 | ssize_t k; | |
2172 | ||
2173 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2174 | ||
eb22ac37 | 2175 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2176 | continue; |
2177 | ||
eb22ac37 | 2178 | if (k < 0 && errno == EAGAIN && do_poll) { |
b92bea5d ZJS |
2179 | struct pollfd pollfd = { |
2180 | .fd = fd, | |
2181 | .events = POLLIN, | |
2182 | }; | |
8d567588 LP |
2183 | |
2184 | if (poll(&pollfd, 1, -1) < 0) { | |
2185 | if (errno == EINTR) | |
2186 | continue; | |
2187 | ||
2188 | return n > 0 ? n : -errno; | |
2189 | } | |
2190 | ||
c22ceead CJ |
2191 | /* We knowingly ignore the revents value here, |
2192 | * and expect that any error/EOF is reported | |
2193 | * via read()/write() | |
2194 | */ | |
8d567588 LP |
2195 | |
2196 | continue; | |
2197 | } | |
2198 | ||
2199 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2200 | } | |
2201 | ||
2202 | p += k; | |
2203 | nbytes -= k; | |
2204 | n += k; | |
2205 | } | |
2206 | ||
2207 | return n; | |
2208 | } | |
2209 | ||
eb22ac37 LP |
2210 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2211 | const uint8_t *p; | |
2212 | ssize_t n = 0; | |
2213 | ||
2214 | assert(fd >= 0); | |
2215 | assert(buf); | |
2216 | ||
2217 | p = buf; | |
2218 | ||
2219 | while (nbytes > 0) { | |
2220 | ssize_t k; | |
2221 | ||
fe652127 LP |
2222 | k = write(fd, p, nbytes); |
2223 | if (k <= 0) { | |
eb22ac37 LP |
2224 | |
2225 | if (k < 0 && errno == EINTR) | |
2226 | continue; | |
2227 | ||
2228 | if (k < 0 && errno == EAGAIN && do_poll) { | |
b92bea5d ZJS |
2229 | struct pollfd pollfd = { |
2230 | .fd = fd, | |
2231 | .events = POLLOUT, | |
2232 | }; | |
eb22ac37 LP |
2233 | |
2234 | if (poll(&pollfd, 1, -1) < 0) { | |
2235 | if (errno == EINTR) | |
2236 | continue; | |
2237 | ||
2238 | return n > 0 ? n : -errno; | |
2239 | } | |
2240 | ||
c22ceead CJ |
2241 | /* We knowingly ignore the revents value here, |
2242 | * and expect that any error/EOF is reported | |
2243 | * via read()/write() | |
2244 | */ | |
eb22ac37 LP |
2245 | |
2246 | continue; | |
2247 | } | |
2248 | ||
2249 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2250 | } | |
2251 | ||
2252 | p += k; | |
2253 | nbytes -= k; | |
2254 | n += k; | |
2255 | } | |
2256 | ||
2257 | return n; | |
2258 | } | |
2259 | ||
ab1f0633 LP |
2260 | int parse_bytes(const char *t, off_t *bytes) { |
2261 | static const struct { | |
2262 | const char *suffix; | |
b32ff512 | 2263 | unsigned long long factor; |
ab1f0633 LP |
2264 | } table[] = { |
2265 | { "B", 1 }, | |
2266 | { "K", 1024ULL }, | |
2267 | { "M", 1024ULL*1024ULL }, | |
2268 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2269 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2270 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2271 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2272 | { "", 1 }, |
2273 | }; | |
2274 | ||
2275 | const char *p; | |
b32ff512 | 2276 | unsigned long long r = 0; |
ab1f0633 LP |
2277 | |
2278 | assert(t); | |
2279 | assert(bytes); | |
2280 | ||
2281 | p = t; | |
2282 | do { | |
2283 | long long l; | |
2284 | char *e; | |
2285 | unsigned i; | |
2286 | ||
2287 | errno = 0; | |
2288 | l = strtoll(p, &e, 10); | |
2289 | ||
8333c77e | 2290 | if (errno > 0) |
ab1f0633 LP |
2291 | return -errno; |
2292 | ||
2293 | if (l < 0) | |
2294 | return -ERANGE; | |
2295 | ||
2296 | if (e == p) | |
2297 | return -EINVAL; | |
2298 | ||
2299 | e += strspn(e, WHITESPACE); | |
2300 | ||
2301 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2302 | if (startswith(e, table[i].suffix)) { | |
b32ff512 ZJS |
2303 | unsigned long long tmp; |
2304 | if ((unsigned long long) l > ULLONG_MAX / table[i].factor) | |
2305 | return -ERANGE; | |
2306 | tmp = l * table[i].factor; | |
2307 | if (tmp > ULLONG_MAX - r) | |
2308 | return -ERANGE; | |
2309 | ||
2310 | r += tmp; | |
2311 | if ((unsigned long long) (off_t) r != r) | |
2312 | return -ERANGE; | |
2313 | ||
ab1f0633 LP |
2314 | p = e + strlen(table[i].suffix); |
2315 | break; | |
2316 | } | |
2317 | ||
2318 | if (i >= ELEMENTSOF(table)) | |
2319 | return -EINVAL; | |
2320 | ||
b32ff512 | 2321 | } while (*p); |
ab1f0633 LP |
2322 | |
2323 | *bytes = r; | |
2324 | ||
2325 | return 0; | |
2326 | } | |
2327 | ||
843d2643 LP |
2328 | int make_stdio(int fd) { |
2329 | int r, s, t; | |
2330 | ||
2331 | assert(fd >= 0); | |
2332 | ||
73836c5c LP |
2333 | r = dup3(fd, STDIN_FILENO, 0); |
2334 | s = dup3(fd, STDOUT_FILENO, 0); | |
2335 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2336 | |
2337 | if (fd >= 3) | |
2338 | close_nointr_nofail(fd); | |
2339 | ||
2340 | if (r < 0 || s < 0 || t < 0) | |
2341 | return -errno; | |
2342 | ||
73836c5c | 2343 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2344 | |
843d2643 LP |
2345 | return 0; |
2346 | } | |
2347 | ||
ade509ce LP |
2348 | int make_null_stdio(void) { |
2349 | int null_fd; | |
2350 | ||
cd3bd60a LP |
2351 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2352 | if (null_fd < 0) | |
ade509ce LP |
2353 | return -errno; |
2354 | ||
2355 | return make_stdio(null_fd); | |
2356 | } | |
2357 | ||
8407a5d0 LP |
2358 | bool is_device_path(const char *path) { |
2359 | ||
2360 | /* Returns true on paths that refer to a device, either in | |
2361 | * sysfs or in /dev */ | |
2362 | ||
2363 | return | |
2364 | path_startswith(path, "/dev/") || | |
2365 | path_startswith(path, "/sys/"); | |
2366 | } | |
2367 | ||
01f78473 | 2368 | int dir_is_empty(const char *path) { |
a05f97b3 | 2369 | _cleanup_closedir_ DIR *d; |
01f78473 | 2370 | int r; |
01f78473 | 2371 | |
a05f97b3 LP |
2372 | d = opendir(path); |
2373 | if (!d) | |
01f78473 LP |
2374 | return -errno; |
2375 | ||
2376 | for (;;) { | |
7d5e9c0f LP |
2377 | struct dirent *de; |
2378 | union dirent_storage buf; | |
01f78473 | 2379 | |
7d5e9c0f | 2380 | r = readdir_r(d, &buf.de, &de); |
a05f97b3 LP |
2381 | if (r > 0) |
2382 | return -r; | |
01f78473 | 2383 | |
a05f97b3 LP |
2384 | if (!de) |
2385 | return 1; | |
01f78473 | 2386 | |
a05f97b3 LP |
2387 | if (!ignore_file(de->d_name)) |
2388 | return 0; | |
2389 | } | |
01f78473 LP |
2390 | } |
2391 | ||
844ec79b ZJS |
2392 | char* dirname_malloc(const char *path) { |
2393 | char *d, *dir, *dir2; | |
2394 | ||
2395 | d = strdup(path); | |
2396 | if (!d) | |
2397 | return NULL; | |
2398 | dir = dirname(d); | |
2399 | assert(dir); | |
2400 | ||
2401 | if (dir != d) { | |
2402 | dir2 = strdup(dir); | |
2403 | free(d); | |
2404 | return dir2; | |
2405 | } | |
2406 | ||
2407 | return dir; | |
2408 | } | |
2409 | ||
d3782d60 | 2410 | unsigned long long random_ull(void) { |
a05f97b3 | 2411 | _cleanup_close_ int fd; |
d3782d60 LP |
2412 | uint64_t ull; |
2413 | ssize_t r; | |
2414 | ||
ac0930c8 LP |
2415 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2416 | if (fd < 0) | |
d3782d60 LP |
2417 | goto fallback; |
2418 | ||
eb22ac37 | 2419 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
2420 | if (r != sizeof(ull)) |
2421 | goto fallback; | |
2422 | ||
2423 | return ull; | |
2424 | ||
2425 | fallback: | |
2426 | return random() * RAND_MAX + random(); | |
2427 | } | |
2428 | ||
a3b6fafe LP |
2429 | unsigned random_u(void) { |
2430 | _cleanup_close_ int fd; | |
2431 | unsigned u; | |
2432 | ssize_t r; | |
2433 | ||
2434 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
2435 | if (fd < 0) | |
2436 | goto fallback; | |
2437 | ||
2438 | r = loop_read(fd, &u, sizeof(u), true); | |
2439 | if (r != sizeof(u)) | |
2440 | goto fallback; | |
2441 | ||
2442 | return u; | |
2443 | ||
2444 | fallback: | |
2445 | return random() * RAND_MAX + random(); | |
2446 | } | |
2447 | ||
5b6319dc LP |
2448 | void rename_process(const char name[8]) { |
2449 | assert(name); | |
2450 | ||
5d6b1584 LP |
2451 | /* This is a like a poor man's setproctitle(). It changes the |
2452 | * comm field, argv[0], and also the glibc's internally used | |
2453 | * name of the process. For the first one a limit of 16 chars | |
2454 | * applies, to the second one usually one of 10 (i.e. length | |
2455 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2456 | * "systemd"). If you pass a longer string it will be | |
2457 | * truncated */ | |
5b6319dc | 2458 | |
5d6b1584 | 2459 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2460 | |
2461 | if (program_invocation_name) | |
2462 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2463 | |
2464 | if (saved_argc > 0) { | |
2465 | int i; | |
2466 | ||
2467 | if (saved_argv[0]) | |
2468 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2469 | ||
2470 | for (i = 1; i < saved_argc; i++) { | |
2471 | if (!saved_argv[i]) | |
2472 | break; | |
2473 | ||
2474 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
2475 | } | |
2476 | } | |
5b6319dc LP |
2477 | } |
2478 | ||
7d793605 LP |
2479 | void sigset_add_many(sigset_t *ss, ...) { |
2480 | va_list ap; | |
2481 | int sig; | |
2482 | ||
2483 | assert(ss); | |
2484 | ||
2485 | va_start(ap, ss); | |
2486 | while ((sig = va_arg(ap, int)) > 0) | |
2487 | assert_se(sigaddset(ss, sig) == 0); | |
2488 | va_end(ap); | |
2489 | } | |
2490 | ||
ef2f1067 LP |
2491 | char* gethostname_malloc(void) { |
2492 | struct utsname u; | |
2493 | ||
2494 | assert_se(uname(&u) >= 0); | |
2495 | ||
344de609 | 2496 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2497 | return strdup(u.nodename); |
2498 | ||
2499 | return strdup(u.sysname); | |
2500 | } | |
2501 | ||
344de609 LP |
2502 | bool hostname_is_set(void) { |
2503 | struct utsname u; | |
2504 | ||
2505 | assert_se(uname(&u) >= 0); | |
2506 | ||
2507 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2508 | } | |
2509 | ||
7c5f152a | 2510 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2511 | long bufsize; |
a05f97b3 LP |
2512 | char *name; |
2513 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2514 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2515 | |
2516 | /* Shortcut things to avoid NSS lookups */ | |
2517 | if (uid == 0) | |
2518 | return strdup("root"); | |
2519 | ||
7c5f152a LP |
2520 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2521 | if (bufsize <= 0) | |
ef2f1067 LP |
2522 | bufsize = 4096; |
2523 | ||
7c5f152a LP |
2524 | buf = malloc(bufsize); |
2525 | if (!buf) | |
ef2f1067 LP |
2526 | return NULL; |
2527 | ||
a05f97b3 LP |
2528 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2529 | return strdup(pw->pw_name); | |
ef2f1067 LP |
2530 | |
2531 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
2532 | return NULL; | |
2533 | ||
2534 | return name; | |
2535 | } | |
2536 | ||
7c5f152a LP |
2537 | char* getlogname_malloc(void) { |
2538 | uid_t uid; | |
2539 | struct stat st; | |
2540 | ||
2541 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2542 | uid = st.st_uid; | |
2543 | else | |
2544 | uid = getuid(); | |
2545 | ||
2546 | return lookup_uid(uid); | |
2547 | } | |
2548 | ||
2549 | char *getusername_malloc(void) { | |
2550 | const char *e; | |
2551 | ||
2552 | e = getenv("USER"); | |
2553 | if (e) | |
2554 | return strdup(e); | |
2555 | ||
2556 | return lookup_uid(getuid()); | |
2557 | } | |
2558 | ||
fc116c6a LP |
2559 | int getttyname_malloc(int fd, char **r) { |
2560 | char path[PATH_MAX], *c; | |
618e02c7 | 2561 | int k; |
8c6db833 LP |
2562 | |
2563 | assert(r); | |
ef2f1067 | 2564 | |
a05f97b3 LP |
2565 | k = ttyname_r(fd, path, sizeof(path)); |
2566 | if (k != 0) | |
618e02c7 | 2567 | return -k; |
ef2f1067 LP |
2568 | |
2569 | char_array_0(path); | |
2570 | ||
a05f97b3 LP |
2571 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2572 | if (!c) | |
8c6db833 LP |
2573 | return -ENOMEM; |
2574 | ||
2575 | *r = c; | |
2576 | return 0; | |
2577 | } | |
2578 | ||
fc116c6a LP |
2579 | int getttyname_harder(int fd, char **r) { |
2580 | int k; | |
2581 | char *s; | |
2582 | ||
a05f97b3 LP |
2583 | k = getttyname_malloc(fd, &s); |
2584 | if (k < 0) | |
fc116c6a LP |
2585 | return k; |
2586 | ||
2587 | if (streq(s, "tty")) { | |
2588 | free(s); | |
4d6d6518 | 2589 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2590 | } |
2591 | ||
2592 | *r = s; | |
2593 | return 0; | |
2594 | } | |
2595 | ||
4d6d6518 | 2596 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
49aa47c7 LP |
2597 | _cleanup_fclose_ FILE *f = NULL; |
2598 | char line[LINE_MAX], *p; | |
fc116c6a | 2599 | unsigned long ttynr; |
49aa47c7 LP |
2600 | const char *fn; |
2601 | int k; | |
fc116c6a | 2602 | |
49aa47c7 LP |
2603 | assert(pid >= 0); |
2604 | assert(d); | |
2605 | ||
2606 | if (pid == 0) | |
2607 | fn = "/proc/self/stat"; | |
2608 | else | |
2609 | fn = procfs_file_alloca(pid, "stat"); | |
4d6d6518 LP |
2610 | |
2611 | f = fopen(fn, "re"); | |
4d6d6518 | 2612 | if (!f) |
fc116c6a LP |
2613 | return -errno; |
2614 | ||
4d6d6518 | 2615 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 2616 | k = feof(f) ? -EIO : -errno; |
fc116c6a LP |
2617 | return k; |
2618 | } | |
2619 | ||
4d6d6518 LP |
2620 | p = strrchr(line, ')'); |
2621 | if (!p) | |
fc116c6a LP |
2622 | return -EIO; |
2623 | ||
2624 | p++; | |
2625 | ||
2626 | if (sscanf(p, " " | |
2627 | "%*c " /* state */ | |
2628 | "%*d " /* ppid */ | |
2629 | "%*d " /* pgrp */ | |
2630 | "%*d " /* session */ | |
2631 | "%lu ", /* ttynr */ | |
2632 | &ttynr) != 1) | |
2633 | return -EIO; | |
2634 | ||
11dc5d2b LP |
2635 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2636 | return -ENOENT; | |
2637 | ||
fc116c6a LP |
2638 | *d = (dev_t) ttynr; |
2639 | return 0; | |
2640 | } | |
2641 | ||
4d6d6518 | 2642 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 2643 | int k; |
fa70beaa | 2644 | char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *s, *b, *p; |
fc116c6a LP |
2645 | dev_t devnr; |
2646 | ||
2647 | assert(r); | |
2648 | ||
4d6d6518 LP |
2649 | k = get_ctty_devnr(pid, &devnr); |
2650 | if (k < 0) | |
fc116c6a LP |
2651 | return k; |
2652 | ||
2653 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
fc116c6a | 2654 | |
23406ce5 LP |
2655 | k = readlink_malloc(fn, &s); |
2656 | if (k < 0) { | |
fc116c6a LP |
2657 | |
2658 | if (k != -ENOENT) | |
2659 | return k; | |
2660 | ||
46824d0e LP |
2661 | /* This is an ugly hack */ |
2662 | if (major(devnr) == 136) { | |
2663 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
2664 | return -ENOMEM; | |
2665 | ||
2666 | *r = b; | |
2667 | if (_devnr) | |
2668 | *_devnr = devnr; | |
2669 | ||
2670 | return 0; | |
2671 | } | |
2672 | ||
fc116c6a LP |
2673 | /* Probably something like the ptys which have no |
2674 | * symlink in /dev/char. Let's return something | |
2675 | * vaguely useful. */ | |
2676 | ||
23406ce5 LP |
2677 | b = strdup(fn + 5); |
2678 | if (!b) | |
fc116c6a LP |
2679 | return -ENOMEM; |
2680 | ||
2681 | *r = b; | |
46824d0e LP |
2682 | if (_devnr) |
2683 | *_devnr = devnr; | |
2684 | ||
fc116c6a LP |
2685 | return 0; |
2686 | } | |
2687 | ||
2688 | if (startswith(s, "/dev/")) | |
2689 | p = s + 5; | |
2690 | else if (startswith(s, "../")) | |
2691 | p = s + 3; | |
2692 | else | |
2693 | p = s; | |
2694 | ||
2695 | b = strdup(p); | |
2696 | free(s); | |
2697 | ||
2698 | if (!b) | |
2699 | return -ENOMEM; | |
2700 | ||
2701 | *r = b; | |
46824d0e LP |
2702 | if (_devnr) |
2703 | *_devnr = devnr; | |
2704 | ||
fc116c6a LP |
2705 | return 0; |
2706 | } | |
2707 | ||
f56d5db9 | 2708 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
2709 | DIR *d; |
2710 | int ret = 0; | |
2711 | ||
2712 | assert(fd >= 0); | |
2713 | ||
2714 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2715 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2716 | |
d4d046e3 LP |
2717 | d = fdopendir(fd); |
2718 | if (!d) { | |
8c6db833 | 2719 | close_nointr_nofail(fd); |
4c633005 LP |
2720 | |
2721 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2722 | } |
2723 | ||
2724 | for (;;) { | |
7d5e9c0f LP |
2725 | struct dirent *de; |
2726 | union dirent_storage buf; | |
7925c22a LP |
2727 | bool is_dir, keep_around; |
2728 | struct stat st; | |
8c6db833 LP |
2729 | int r; |
2730 | ||
7d5e9c0f | 2731 | r = readdir_r(d, &buf.de, &de); |
d4d046e3 LP |
2732 | if (r != 0 && ret == 0) { |
2733 | ret = -r; | |
8c6db833 LP |
2734 | break; |
2735 | } | |
2736 | ||
2737 | if (!de) | |
2738 | break; | |
2739 | ||
2740 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
2741 | continue; | |
2742 | ||
7925c22a LP |
2743 | if (de->d_type == DT_UNKNOWN || |
2744 | honour_sticky || | |
2745 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2746 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2747 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2748 | ret = -errno; |
2749 | continue; | |
2750 | } | |
2751 | ||
2752 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2753 | keep_around = |
2754 | honour_sticky && | |
2755 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2756 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2757 | } else { |
8c6db833 | 2758 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2759 | keep_around = false; |
ad293f5a | 2760 | } |
8c6db833 LP |
2761 | |
2762 | if (is_dir) { | |
2763 | int subdir_fd; | |
8c6db833 | 2764 | |
597f43c7 | 2765 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
2766 | if (root_dev && st.st_dev != root_dev->st_dev) |
2767 | continue; | |
8c6db833 | 2768 | |
7925c22a LP |
2769 | subdir_fd = openat(fd, de->d_name, |
2770 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
2771 | if (subdir_fd < 0) { | |
2772 | if (ret == 0 && errno != ENOENT) | |
2773 | ret = -errno; | |
2774 | continue; | |
2775 | } | |
2776 | ||
b3d28469 | 2777 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
2778 | if (r < 0 && ret == 0) |
2779 | ret = r; | |
2780 | ||
2781 | if (!keep_around) | |
2782 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
2783 | if (ret == 0 && errno != ENOENT) |
2784 | ret = -errno; | |
2785 | } | |
2786 | ||
2787 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
2788 | |
2789 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 2790 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2791 | ret = -errno; |
2792 | } | |
2793 | } | |
2794 | } | |
2795 | ||
2796 | closedir(d); | |
2797 | ||
2798 | return ret; | |
2799 | } | |
2800 | ||
44a6b1b6 | 2801 | _pure_ static int is_temporary_fs(struct statfs *s) { |
943aad8c | 2802 | assert(s); |
bdd29249 | 2803 | return |
c51cf056 ZJS |
2804 | F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) || |
2805 | F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC); | |
943aad8c ZJS |
2806 | } |
2807 | ||
f56d5db9 LP |
2808 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
2809 | struct statfs s; | |
2810 | ||
2811 | assert(fd >= 0); | |
2812 | ||
2813 | if (fstatfs(fd, &s) < 0) { | |
2814 | close_nointr_nofail(fd); | |
2815 | return -errno; | |
2816 | } | |
2817 | ||
2818 | /* We refuse to clean disk file systems with this call. This | |
2819 | * is extra paranoia just to be sure we never ever remove | |
2820 | * non-state data */ | |
943aad8c | 2821 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2822 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2823 | close_nointr_nofail(fd); | |
2824 | return -EPERM; | |
2825 | } | |
2826 | ||
2827 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
2828 | } | |
2829 | ||
2830 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
2831 | int fd, r; | |
2832 | struct statfs s; | |
8c6db833 LP |
2833 | |
2834 | assert(path); | |
2835 | ||
f56d5db9 LP |
2836 | /* We refuse to clean the root file system with this |
2837 | * call. This is extra paranoia to never cause a really | |
2838 | * seriously broken system. */ | |
2839 | if (path_equal(path, "/")) { | |
2840 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
2841 | return -EPERM; | |
2842 | } | |
461b1822 | 2843 | |
d4d046e3 LP |
2844 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
2845 | if (fd < 0) { | |
8c6db833 LP |
2846 | |
2847 | if (errno != ENOTDIR) | |
2848 | return -errno; | |
2849 | ||
f56d5db9 LP |
2850 | if (!dangerous) { |
2851 | if (statfs(path, &s) < 0) | |
2852 | return -errno; | |
2853 | ||
943aad8c | 2854 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2855 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2856 | return -EPERM; | |
2857 | } | |
2858 | } | |
2859 | ||
8c6db833 | 2860 | if (delete_root && !only_dirs) |
d4d046e3 | 2861 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
2862 | return -errno; |
2863 | ||
2864 | return 0; | |
2865 | } | |
2866 | ||
f56d5db9 LP |
2867 | if (!dangerous) { |
2868 | if (fstatfs(fd, &s) < 0) { | |
2869 | close_nointr_nofail(fd); | |
2870 | return -errno; | |
2871 | } | |
ad293f5a | 2872 | |
943aad8c | 2873 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2874 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2875 | close_nointr_nofail(fd); | |
2876 | return -EPERM; | |
2877 | } | |
2878 | } | |
2879 | ||
2880 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
2881 | if (delete_root) { |
2882 | ||
8d53b453 | 2883 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 2884 | return r; |
8c6db833 | 2885 | |
e27796a0 | 2886 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
2887 | if (r == 0) |
2888 | r = -errno; | |
2889 | } | |
ad293f5a | 2890 | } |
8c6db833 LP |
2891 | |
2892 | return r; | |
2893 | } | |
2894 | ||
f56d5db9 LP |
2895 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
2896 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
2897 | } | |
2898 | ||
2899 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
2900 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
2901 | } | |
2902 | ||
8c6db833 LP |
2903 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
2904 | assert(path); | |
2905 | ||
2906 | /* Under the assumption that we are running privileged we | |
2907 | * first change the access mode and only then hand out | |
2908 | * ownership to avoid a window where access is too open. */ | |
2909 | ||
8d53b453 LP |
2910 | if (mode != (mode_t) -1) |
2911 | if (chmod(path, mode) < 0) | |
2912 | return -errno; | |
8c6db833 | 2913 | |
8d53b453 LP |
2914 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2915 | if (chown(path, uid, gid) < 0) | |
2916 | return -errno; | |
8c6db833 LP |
2917 | |
2918 | return 0; | |
ef2f1067 LP |
2919 | } |
2920 | ||
f4b47811 LP |
2921 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
2922 | assert(fd >= 0); | |
2923 | ||
2924 | /* Under the assumption that we are running privileged we | |
2925 | * first change the access mode and only then hand out | |
2926 | * ownership to avoid a window where access is too open. */ | |
2927 | ||
9588bc32 LP |
2928 | if (mode != (mode_t) -1) |
2929 | if (fchmod(fd, mode) < 0) | |
2930 | return -errno; | |
f4b47811 | 2931 | |
9588bc32 LP |
2932 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2933 | if (fchown(fd, uid, gid) < 0) | |
2934 | return -errno; | |
f4b47811 LP |
2935 | |
2936 | return 0; | |
2937 | } | |
2938 | ||
82c121a4 LP |
2939 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2940 | cpu_set_t *r; | |
2941 | unsigned n = 1024; | |
2942 | ||
2943 | /* Allocates the cpuset in the right size */ | |
2944 | ||
2945 | for (;;) { | |
2946 | if (!(r = CPU_ALLOC(n))) | |
2947 | return NULL; | |
2948 | ||
2949 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2950 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2951 | ||
2952 | if (ncpus) | |
2953 | *ncpus = n; | |
2954 | ||
2955 | return r; | |
2956 | } | |
2957 | ||
2958 | CPU_FREE(r); | |
2959 | ||
2960 | if (errno != EINVAL) | |
2961 | return NULL; | |
2962 | ||
2963 | n *= 2; | |
2964 | } | |
2965 | } | |
2966 | ||
984a2be4 | 2967 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) { |
9ab7a8d2 | 2968 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
2969 | _cleanup_free_ char *s = NULL; |
2970 | _cleanup_close_ int fd = -1; | |
b92bea5d | 2971 | struct iovec iovec[6] = {}; |
81beb750 | 2972 | int n = 0; |
984a2be4 | 2973 | static bool prev_ephemeral; |
9e58ff9c LP |
2974 | |
2975 | assert(format); | |
2976 | ||
9ab7a8d2 | 2977 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
2978 | * optional and go exclusively to the console. */ |
2979 | ||
2980 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 2981 | return log_oom(); |
9e58ff9c | 2982 | |
67e5cc4f | 2983 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 2984 | if (fd < 0) |
669bec5d | 2985 | return fd; |
9e58ff9c | 2986 | |
67e5cc4f | 2987 | if (ellipse) { |
9ab7a8d2 MS |
2988 | char *e; |
2989 | size_t emax, sl; | |
2990 | int c; | |
2991 | ||
67e5cc4f LP |
2992 | c = fd_columns(fd); |
2993 | if (c <= 0) | |
2994 | c = 80; | |
81beb750 | 2995 | |
669bec5d | 2996 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
2997 | |
2998 | emax = c - sl - 1; | |
2999 | if (emax < 3) | |
3000 | emax = 3; | |
81beb750 | 3001 | |
67e5cc4f LP |
3002 | e = ellipsize(s, emax, 75); |
3003 | if (e) { | |
3004 | free(s); | |
3005 | s = e; | |
3006 | } | |
81beb750 LP |
3007 | } |
3008 | ||
984a2be4 MS |
3009 | if (prev_ephemeral) |
3010 | IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE); | |
3011 | prev_ephemeral = ephemeral; | |
3012 | ||
9ab7a8d2 MS |
3013 | if (status) { |
3014 | if (!isempty(status)) { | |
3015 | IOVEC_SET_STRING(iovec[n++], "["); | |
3016 | IOVEC_SET_STRING(iovec[n++], status); | |
3017 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3018 | } else | |
3019 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3020 | } |
3021 | ||
9ab7a8d2 | 3022 | IOVEC_SET_STRING(iovec[n++], s); |
984a2be4 MS |
3023 | if (!ephemeral) |
3024 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 3025 | |
669bec5d LP |
3026 | if (writev(fd, iovec, n) < 0) |
3027 | return -errno; | |
9e58ff9c | 3028 | |
669bec5d | 3029 | return 0; |
9e58ff9c LP |
3030 | } |
3031 | ||
984a2be4 | 3032 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) { |
c846ff47 | 3033 | va_list ap; |
669bec5d | 3034 | int r; |
c846ff47 LP |
3035 | |
3036 | assert(format); | |
3037 | ||
3038 | va_start(ap, format); | |
984a2be4 | 3039 | r = status_vprintf(status, ellipse, ephemeral, format, ap); |
c846ff47 | 3040 | va_end(ap); |
669bec5d LP |
3041 | |
3042 | return r; | |
c846ff47 LP |
3043 | } |
3044 | ||
669bec5d | 3045 | int status_welcome(void) { |
669bec5d | 3046 | _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL; |
9588bc32 | 3047 | int r; |
669bec5d LP |
3048 | |
3049 | r = parse_env_file("/etc/os-release", NEWLINE, | |
3050 | "PRETTY_NAME", &pretty_name, | |
3051 | "ANSI_COLOR", &ansi_color, | |
3052 | NULL); | |
9588bc32 | 3053 | |
669bec5d LP |
3054 | if (r < 0 && r != -ENOENT) |
3055 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3056 | ||
f620dff8 | 3057 | return status_printf(NULL, false, false, |
669bec5d LP |
3058 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", |
3059 | isempty(ansi_color) ? "1" : ansi_color, | |
3060 | isempty(pretty_name) ? "Linux" : pretty_name); | |
c846ff47 LP |
3061 | } |
3062 | ||
fab56fc5 LP |
3063 | char *replace_env(const char *format, char **env) { |
3064 | enum { | |
3065 | WORD, | |
c24eb49e | 3066 | CURLY, |
fab56fc5 LP |
3067 | VARIABLE |
3068 | } state = WORD; | |
3069 | ||
3070 | const char *e, *word = format; | |
3071 | char *r = NULL, *k; | |
3072 | ||
3073 | assert(format); | |
3074 | ||
3075 | for (e = format; *e; e ++) { | |
3076 | ||
3077 | switch (state) { | |
3078 | ||
3079 | case WORD: | |
3080 | if (*e == '$') | |
c24eb49e | 3081 | state = CURLY; |
fab56fc5 LP |
3082 | break; |
3083 | ||
c24eb49e LP |
3084 | case CURLY: |
3085 | if (*e == '{') { | |
fab56fc5 LP |
3086 | if (!(k = strnappend(r, word, e-word-1))) |
3087 | goto fail; | |
3088 | ||
3089 | free(r); | |
3090 | r = k; | |
3091 | ||
3092 | word = e-1; | |
3093 | state = VARIABLE; | |
3094 | ||
3095 | } else if (*e == '$') { | |
3096 | if (!(k = strnappend(r, word, e-word))) | |
3097 | goto fail; | |
3098 | ||
3099 | free(r); | |
3100 | r = k; | |
3101 | ||
3102 | word = e+1; | |
3103 | state = WORD; | |
3104 | } else | |
3105 | state = WORD; | |
3106 | break; | |
3107 | ||
3108 | case VARIABLE: | |
c24eb49e | 3109 | if (*e == '}') { |
b95cf362 | 3110 | const char *t; |
fab56fc5 | 3111 | |
4d1a6904 | 3112 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 3113 | |
4d1a6904 LP |
3114 | k = strappend(r, t); |
3115 | if (!k) | |
b95cf362 | 3116 | goto fail; |
fab56fc5 | 3117 | |
b95cf362 LP |
3118 | free(r); |
3119 | r = k; | |
fab56fc5 | 3120 | |
b95cf362 | 3121 | word = e+1; |
fab56fc5 LP |
3122 | state = WORD; |
3123 | } | |
3124 | break; | |
3125 | } | |
3126 | } | |
3127 | ||
3128 | if (!(k = strnappend(r, word, e-word))) | |
3129 | goto fail; | |
3130 | ||
3131 | free(r); | |
3132 | return k; | |
3133 | ||
3134 | fail: | |
3135 | free(r); | |
3136 | return NULL; | |
3137 | } | |
3138 | ||
3139 | char **replace_env_argv(char **argv, char **env) { | |
3140 | char **r, **i; | |
c24eb49e LP |
3141 | unsigned k = 0, l = 0; |
3142 | ||
3143 | l = strv_length(argv); | |
fab56fc5 | 3144 | |
c24eb49e | 3145 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3146 | return NULL; |
3147 | ||
3148 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3149 | |
3150 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3151 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3152 | char *e; | |
3153 | char **w, **m; | |
3154 | unsigned q; | |
c24eb49e | 3155 | |
4d1a6904 LP |
3156 | e = strv_env_get(env, *i+1); |
3157 | if (e) { | |
c24eb49e LP |
3158 | |
3159 | if (!(m = strv_split_quoted(e))) { | |
3160 | r[k] = NULL; | |
3161 | strv_free(r); | |
3162 | return NULL; | |
3163 | } | |
b95cf362 LP |
3164 | } else |
3165 | m = NULL; | |
c24eb49e | 3166 | |
b95cf362 LP |
3167 | q = strv_length(m); |
3168 | l = l + q - 1; | |
c24eb49e | 3169 | |
b95cf362 LP |
3170 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3171 | r[k] = NULL; | |
3172 | strv_free(r); | |
3173 | strv_free(m); | |
3174 | return NULL; | |
3175 | } | |
c24eb49e | 3176 | |
b95cf362 LP |
3177 | r = w; |
3178 | if (m) { | |
c24eb49e LP |
3179 | memcpy(r + k, m, q * sizeof(char*)); |
3180 | free(m); | |
c24eb49e | 3181 | } |
b95cf362 LP |
3182 | |
3183 | k += q; | |
3184 | continue; | |
c24eb49e LP |
3185 | } |
3186 | ||
3187 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3188 | if (!(r[k++] = replace_env(*i, env))) { |
3189 | strv_free(r); | |
3190 | return NULL; | |
3191 | } | |
3192 | } | |
3193 | ||
3194 | r[k] = NULL; | |
3195 | return r; | |
3196 | } | |
3197 | ||
81beb750 | 3198 | int fd_columns(int fd) { |
b92bea5d | 3199 | struct winsize ws = {}; |
81beb750 LP |
3200 | |
3201 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3202 | return -errno; | |
3203 | ||
3204 | if (ws.ws_col <= 0) | |
3205 | return -EIO; | |
3206 | ||
3207 | return ws.ws_col; | |
3208 | } | |
3209 | ||
28917d7d | 3210 | unsigned columns(void) { |
fa776d8e | 3211 | const char *e; |
7009eec2 | 3212 | int c; |
fa776d8e | 3213 | |
28917d7d LP |
3214 | if (_likely_(cached_columns > 0)) |
3215 | return cached_columns; | |
11f96fac | 3216 | |
28917d7d LP |
3217 | c = 0; |
3218 | e = getenv("COLUMNS"); | |
3219 | if (e) | |
7009eec2 | 3220 | safe_atoi(e, &c); |
fa776d8e | 3221 | |
28917d7d LP |
3222 | if (c <= 0) |
3223 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3224 | |
28917d7d LP |
3225 | if (c <= 0) |
3226 | c = 80; | |
11f96fac | 3227 | |
28917d7d LP |
3228 | cached_columns = c; |
3229 | return c; | |
11f96fac ZJS |
3230 | } |
3231 | ||
8f2d43a0 | 3232 | int fd_lines(int fd) { |
b92bea5d | 3233 | struct winsize ws = {}; |
8f2d43a0 LP |
3234 | |
3235 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3236 | return -errno; | |
3237 | ||
3238 | if (ws.ws_row <= 0) | |
3239 | return -EIO; | |
3240 | ||
3241 | return ws.ws_row; | |
3242 | } | |
3243 | ||
3244 | unsigned lines(void) { | |
8f2d43a0 | 3245 | const char *e; |
ed757c0c | 3246 | unsigned l; |
8f2d43a0 | 3247 | |
ed757c0c LP |
3248 | if (_likely_(cached_lines > 0)) |
3249 | return cached_lines; | |
8f2d43a0 | 3250 | |
ed757c0c | 3251 | l = 0; |
8f2d43a0 LP |
3252 | e = getenv("LINES"); |
3253 | if (e) | |
ed757c0c | 3254 | safe_atou(e, &l); |
8f2d43a0 | 3255 | |
ed757c0c LP |
3256 | if (l <= 0) |
3257 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3258 | |
ed757c0c LP |
3259 | if (l <= 0) |
3260 | l = 24; | |
8f2d43a0 | 3261 | |
ed757c0c LP |
3262 | cached_lines = l; |
3263 | return cached_lines; | |
3264 | } | |
3265 | ||
3266 | /* intended to be used as a SIGWINCH sighandler */ | |
3267 | void columns_lines_cache_reset(int signum) { | |
3268 | cached_columns = 0; | |
3269 | cached_lines = 0; | |
3270 | } | |
3271 | ||
3272 | bool on_tty(void) { | |
3273 | static int cached_on_tty = -1; | |
3274 | ||
3275 | if (_unlikely_(cached_on_tty < 0)) | |
3276 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3277 | ||
3278 | return cached_on_tty; | |
8f2d43a0 LP |
3279 | } |
3280 | ||
b4f10a5e | 3281 | int running_in_chroot(void) { |
b92bea5d | 3282 | struct stat a = {}, b = {}; |
b4f10a5e LP |
3283 | |
3284 | /* Only works as root */ | |
b4f10a5e LP |
3285 | if (stat("/proc/1/root", &a) < 0) |
3286 | return -errno; | |
3287 | ||
3288 | if (stat("/", &b) < 0) | |
3289 | return -errno; | |
3290 | ||
3291 | return | |
3292 | a.st_dev != b.st_dev || | |
3293 | a.st_ino != b.st_ino; | |
3294 | } | |
3295 | ||
f405e86d | 3296 | static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
72f59706 | 3297 | size_t x; |
8fe914ec LP |
3298 | char *r; |
3299 | ||
3300 | assert(s); | |
3301 | assert(percent <= 100); | |
72f59706 | 3302 | assert(new_length >= 3); |
8fe914ec | 3303 | |
72f59706 LP |
3304 | if (old_length <= 3 || old_length <= new_length) |
3305 | return strndup(s, old_length); | |
8fe914ec | 3306 | |
72f59706 LP |
3307 | r = new0(char, new_length+1); |
3308 | if (!r) | |
a6f0104a | 3309 | return NULL; |
8fe914ec | 3310 | |
72f59706 | 3311 | x = (new_length * percent) / 100; |
8fe914ec | 3312 | |
72f59706 LP |
3313 | if (x > new_length - 3) |
3314 | x = new_length - 3; | |
8fe914ec LP |
3315 | |
3316 | memcpy(r, s, x); | |
3317 | r[x] = '.'; | |
3318 | r[x+1] = '.'; | |
3319 | r[x+2] = '.'; | |
3320 | memcpy(r + x + 3, | |
72f59706 LP |
3321 | s + old_length - (new_length - x - 3), |
3322 | new_length - x - 3); | |
8fe914ec LP |
3323 | |
3324 | return r; | |
3325 | } | |
3326 | ||
f405e86d SL |
3327 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3328 | size_t x; | |
3329 | char *e; | |
3330 | const char *i, *j; | |
3331 | unsigned k, len, len2; | |
3332 | ||
3333 | assert(s); | |
3334 | assert(percent <= 100); | |
3335 | assert(new_length >= 3); | |
3336 | ||
3337 | /* if no multibyte characters use ascii_ellipsize_mem for speed */ | |
3338 | if (ascii_is_valid(s)) | |
3339 | return ascii_ellipsize_mem(s, old_length, new_length, percent); | |
3340 | ||
3341 | if (old_length <= 3 || old_length <= new_length) | |
3342 | return strndup(s, old_length); | |
3343 | ||
3344 | x = (new_length * percent) / 100; | |
3345 | ||
3346 | if (x > new_length - 3) | |
3347 | x = new_length - 3; | |
3348 | ||
3349 | k = 0; | |
3350 | for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) { | |
3351 | int c; | |
3352 | ||
3353 | c = utf8_encoded_to_unichar(i); | |
3354 | if (c < 0) | |
3355 | return NULL; | |
3356 | k += unichar_iswide(c) ? 2 : 1; | |
3357 | } | |
3358 | ||
3359 | if (k > x) /* last character was wide and went over quota */ | |
3360 | x ++; | |
3361 | ||
3362 | for (j = s + old_length; k < new_length && j > i; ) { | |
3363 | int c; | |
3364 | ||
3365 | j = utf8_prev_char(j); | |
3366 | c = utf8_encoded_to_unichar(j); | |
3367 | if (c < 0) | |
3368 | return NULL; | |
3369 | k += unichar_iswide(c) ? 2 : 1; | |
3370 | } | |
3371 | assert(i <= j); | |
3372 | ||
3373 | /* we don't actually need to ellipsize */ | |
3374 | if (i == j) | |
3375 | return memdup(s, old_length + 1); | |
3376 | ||
3377 | /* make space for ellipsis */ | |
3378 | j = utf8_next_char(j); | |
3379 | ||
3380 | len = i - s; | |
3381 | len2 = s + old_length - j; | |
3382 | e = new(char, len + 3 + len2 + 1); | |
3383 | if (!e) | |
3384 | return NULL; | |
3385 | ||
3386 | /* | |
3387 | printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n", | |
3388 | old_length, new_length, x, len, len2, k); | |
3389 | */ | |
3390 | ||
3391 | memcpy(e, s, len); | |
3392 | e[len] = 0xe2; /* tri-dot ellipsis: … */ | |
3393 | e[len + 1] = 0x80; | |
3394 | e[len + 2] = 0xa6; | |
3395 | ||
3396 | memcpy(e + len + 3, j, len2 + 1); | |
3397 | ||
3398 | return e; | |
3399 | } | |
3400 | ||
72f59706 LP |
3401 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3402 | return ellipsize_mem(s, strlen(s), length, percent); | |
3403 | } | |
3404 | ||
f6144808 LP |
3405 | int touch(const char *path) { |
3406 | int fd; | |
3407 | ||
3408 | assert(path); | |
3409 | ||
73836c5c LP |
3410 | /* This just opens the file for writing, ensuring it |
3411 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3412 | * does it. */ | |
3413 | ||
3414 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3415 | if (fd < 0) | |
f6144808 LP |
3416 | return -errno; |
3417 | ||
3418 | close_nointr_nofail(fd); | |
3419 | return 0; | |
3420 | } | |
afea26ad | 3421 | |
97c4a07d | 3422 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3423 | size_t l; |
3424 | assert(s); | |
3425 | ||
73836c5c LP |
3426 | /* This is rather stupid, simply removes the heading and |
3427 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3428 | * escaping or anything. We should make this smarter one |
3429 | * day...*/ | |
73836c5c | 3430 | |
31ed59c5 LP |
3431 | l = strlen(s); |
3432 | if (l < 2) | |
11ce3427 LP |
3433 | return strdup(s); |
3434 | ||
97c4a07d | 3435 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3436 | return strndup(s+1, l-2); |
3437 | ||
3438 | return strdup(s); | |
3439 | } | |
3440 | ||
5f7c426e | 3441 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3442 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3443 | char *eq, *r; | |
5f7c426e | 3444 | |
57f30678 LP |
3445 | eq = strchr(s, '='); |
3446 | if (!eq) { | |
3447 | char *t; | |
5f7c426e | 3448 | |
57f30678 LP |
3449 | r = strdup(s); |
3450 | if (!r) | |
5f7c426e LP |
3451 | return NULL; |
3452 | ||
57f30678 LP |
3453 | t = strstrip(r); |
3454 | if (t == r) | |
3455 | return r; | |
3456 | ||
3457 | memmove(r, t, strlen(t) + 1); | |
3458 | return r; | |
5f7c426e LP |
3459 | } |
3460 | ||
57f30678 LP |
3461 | name = strndup(s, eq - s); |
3462 | if (!name) | |
5f7c426e LP |
3463 | return NULL; |
3464 | ||
57f30678 LP |
3465 | p = strdup(eq + 1); |
3466 | if (!p) | |
5f7c426e | 3467 | return NULL; |
5f7c426e LP |
3468 | |
3469 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3470 | if (!value) |
5f7c426e | 3471 | return NULL; |
5f7c426e | 3472 | |
57f30678 | 3473 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3474 | r = NULL; |
3475 | ||
5f7c426e LP |
3476 | return r; |
3477 | } | |
3478 | ||
8e12a6ae | 3479 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3480 | siginfo_t dummy; |
3481 | ||
2e78aa99 | 3482 | assert(pid >= 1); |
1968a360 LP |
3483 | |
3484 | if (!status) | |
3485 | status = &dummy; | |
2e78aa99 LP |
3486 | |
3487 | for (;;) { | |
8e12a6ae LP |
3488 | zero(*status); |
3489 | ||
3490 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3491 | |
3492 | if (errno == EINTR) | |
3493 | continue; | |
3494 | ||
3495 | return -errno; | |
3496 | } | |
3497 | ||
3498 | return 0; | |
3499 | } | |
3500 | } | |
3501 | ||
97c4a07d LP |
3502 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3503 | int r; | |
3504 | siginfo_t status; | |
3505 | ||
3506 | assert(name); | |
3507 | assert(pid > 1); | |
3508 | ||
d87be9b0 LP |
3509 | r = wait_for_terminate(pid, &status); |
3510 | if (r < 0) { | |
97c4a07d LP |
3511 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3512 | return r; | |
3513 | } | |
3514 | ||
3515 | if (status.si_code == CLD_EXITED) { | |
3516 | if (status.si_status != 0) { | |
3517 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3518 | return status.si_status; |
97c4a07d LP |
3519 | } |
3520 | ||
3521 | log_debug("%s succeeded.", name); | |
3522 | return 0; | |
3523 | ||
3524 | } else if (status.si_code == CLD_KILLED || | |
3525 | status.si_code == CLD_DUMPED) { | |
3526 | ||
3527 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3528 | return -EPROTO; | |
3529 | } | |
3530 | ||
3531 | log_warning("%s failed due to unknown reason.", name); | |
3532 | return -EPROTO; | |
97c4a07d LP |
3533 | } |
3534 | ||
6a39419f | 3535 | _noreturn_ void freeze(void) { |
720ce21d LP |
3536 | |
3537 | /* Make sure nobody waits for us on a socket anymore */ | |
3538 | close_all_fds(NULL, 0); | |
3539 | ||
c29597a1 LP |
3540 | sync(); |
3541 | ||
3c14d26c LP |
3542 | for (;;) |
3543 | pause(); | |
3544 | } | |
3545 | ||
00dc5d76 LP |
3546 | bool null_or_empty(struct stat *st) { |
3547 | assert(st); | |
3548 | ||
3549 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3550 | return true; | |
3551 | ||
c8f26f42 | 3552 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3553 | return true; |
3554 | ||
3555 | return false; | |
3556 | } | |
3557 | ||
83096483 LP |
3558 | int null_or_empty_path(const char *fn) { |
3559 | struct stat st; | |
3560 | ||
3561 | assert(fn); | |
3562 | ||
3563 | if (stat(fn, &st) < 0) | |
3564 | return -errno; | |
3565 | ||
3566 | return null_or_empty(&st); | |
3567 | } | |
3568 | ||
a247755d | 3569 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3570 | int nfd; |
3571 | DIR *d; | |
3572 | ||
dd94c17e LP |
3573 | assert(!(flags & O_CREAT)); |
3574 | ||
3575 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
73836c5c | 3576 | if (nfd < 0) |
c4731d11 LP |
3577 | return NULL; |
3578 | ||
73836c5c LP |
3579 | d = fdopendir(nfd); |
3580 | if (!d) { | |
c4731d11 LP |
3581 | close_nointr_nofail(nfd); |
3582 | return NULL; | |
3583 | } | |
3584 | ||
3585 | return d; | |
3b63d2d3 LP |
3586 | } |
3587 | ||
8a0867d6 LP |
3588 | int signal_from_string_try_harder(const char *s) { |
3589 | int signo; | |
3590 | assert(s); | |
3591 | ||
73836c5c LP |
3592 | signo = signal_from_string(s); |
3593 | if (signo <= 0) | |
8a0867d6 LP |
3594 | if (startswith(s, "SIG")) |
3595 | return signal_from_string(s+3); | |
3596 | ||
3597 | return signo; | |
3598 | } | |
3599 | ||
383182b5 | 3600 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
22f5f628 DR |
3601 | _cleanup_free_ char *t = NULL, *u = NULL; |
3602 | char *dn; | |
3603 | size_t enc_len; | |
e23a0ce8 | 3604 | |
383182b5 DR |
3605 | u = unquote(tagvalue, "\"\'"); |
3606 | if (u == NULL) | |
3607 | return NULL; | |
e23a0ce8 | 3608 | |
1d5989fd | 3609 | enc_len = strlen(u) * 4 + 1; |
22f5f628 | 3610 | t = new(char, enc_len); |
383182b5 DR |
3611 | if (t == NULL) |
3612 | return NULL; | |
e23a0ce8 | 3613 | |
8f6ce71f | 3614 | if (encode_devnode_name(u, t, enc_len) < 0) |
22f5f628 | 3615 | return NULL; |
e23a0ce8 | 3616 | |
22f5f628 | 3617 | if (asprintf(&dn, "/dev/disk/by-%s/%s", by, t) < 0) |
383182b5 | 3618 | return NULL; |
e23a0ce8 | 3619 | |
383182b5 DR |
3620 | return dn; |
3621 | } | |
e23a0ce8 | 3622 | |
383182b5 | 3623 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3624 | assert(p); |
3625 | ||
383182b5 DR |
3626 | if (startswith(p, "LABEL=")) |
3627 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3628 | |
383182b5 DR |
3629 | if (startswith(p, "UUID=")) |
3630 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3631 | |
84cc2abf DR |
3632 | if (startswith(p, "PARTUUID=")) |
3633 | return tag_to_udev_node(p+9, "partuuid"); | |
3634 | ||
3635 | if (startswith(p, "PARTLABEL=")) | |
3636 | return tag_to_udev_node(p+10, "partlabel"); | |
3637 | ||
e23a0ce8 LP |
3638 | return strdup(p); |
3639 | } | |
3640 | ||
f212ac12 LP |
3641 | bool tty_is_vc(const char *tty) { |
3642 | assert(tty); | |
3643 | ||
3644 | if (startswith(tty, "/dev/")) | |
3645 | tty += 5; | |
3646 | ||
98a28fef LP |
3647 | return vtnr_from_tty(tty) >= 0; |
3648 | } | |
3649 | ||
d1122ad5 LP |
3650 | bool tty_is_console(const char *tty) { |
3651 | assert(tty); | |
3652 | ||
3653 | if (startswith(tty, "/dev/")) | |
3654 | tty += 5; | |
3655 | ||
3656 | return streq(tty, "console"); | |
3657 | } | |
3658 | ||
98a28fef LP |
3659 | int vtnr_from_tty(const char *tty) { |
3660 | int i, r; | |
3661 | ||
3662 | assert(tty); | |
3663 | ||
3664 | if (startswith(tty, "/dev/")) | |
3665 | tty += 5; | |
3666 | ||
3667 | if (!startswith(tty, "tty") ) | |
3668 | return -EINVAL; | |
3669 | ||
3670 | if (tty[3] < '0' || tty[3] > '9') | |
3671 | return -EINVAL; | |
3672 | ||
3673 | r = safe_atoi(tty+3, &i); | |
3674 | if (r < 0) | |
3675 | return r; | |
3676 | ||
3677 | if (i < 0 || i > 63) | |
3678 | return -EINVAL; | |
3679 | ||
3680 | return i; | |
f212ac12 LP |
3681 | } |
3682 | ||
21baf21a MS |
3683 | char *resolve_dev_console(char **active) { |
3684 | char *tty; | |
3685 | ||
3686 | /* Resolve where /dev/console is pointing to, if /sys is actually ours | |
3687 | * (i.e. not read-only-mounted which is a sign for container setups) */ | |
3688 | ||
3689 | if (path_is_read_only_fs("/sys") > 0) | |
3690 | return NULL; | |
3691 | ||
3692 | if (read_one_line_file("/sys/class/tty/console/active", active) < 0) | |
3693 | return NULL; | |
3694 | ||
3695 | /* If multiple log outputs are configured the last one is what | |
3696 | * /dev/console points to */ | |
3697 | tty = strrchr(*active, ' '); | |
3698 | if (tty) | |
3699 | tty++; | |
3700 | else | |
3701 | tty = *active; | |
3702 | ||
8aa5429a OB |
3703 | if (streq(tty, "tty0")) { |
3704 | char *tmp; | |
3705 | ||
3706 | /* Get the active VC (e.g. tty1) */ | |
3707 | if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) { | |
3708 | free(*active); | |
3709 | tty = *active = tmp; | |
3710 | } | |
3711 | } | |
3712 | ||
21baf21a MS |
3713 | return tty; |
3714 | } | |
3715 | ||
3043935f | 3716 | bool tty_is_vc_resolve(const char *tty) { |
9588bc32 | 3717 | _cleanup_free_ char *active = NULL; |
3030ccd7 | 3718 | |
e3aa71c3 LP |
3719 | assert(tty); |
3720 | ||
3721 | if (startswith(tty, "/dev/")) | |
3722 | tty += 5; | |
3723 | ||
21baf21a MS |
3724 | if (streq(tty, "console")) { |
3725 | tty = resolve_dev_console(&active); | |
3726 | if (!tty) | |
3727 | return false; | |
3728 | } | |
3030ccd7 | 3729 | |
9588bc32 | 3730 | return tty_is_vc(tty); |
3043935f LP |
3731 | } |
3732 | ||
3733 | const char *default_term_for_tty(const char *tty) { | |
3734 | assert(tty); | |
3735 | ||
acda6a05 | 3736 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3737 | } |
3738 | ||
87d2c1ff | 3739 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3740 | assert(de); |
3741 | ||
3742 | if (ignore_file(de->d_name)) | |
3743 | return false; | |
3744 | ||
3745 | if (de->d_type != DT_REG && | |
3746 | de->d_type != DT_LNK && | |
3747 | de->d_type != DT_UNKNOWN) | |
3748 | return false; | |
3749 | ||
3750 | return true; | |
3751 | } | |
3752 | ||
87d2c1ff LP |
3753 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3754 | assert(de); | |
3755 | ||
a228a22f LP |
3756 | if (de->d_type != DT_REG && |
3757 | de->d_type != DT_LNK && | |
3758 | de->d_type != DT_UNKNOWN) | |
3759 | return false; | |
3760 | ||
3761 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3762 | return false; |
3763 | ||
3764 | return endswith(de->d_name, suffix); | |
3765 | } | |
3766 | ||
83cc030f LP |
3767 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
3768 | DIR *_d = NULL; | |
3769 | struct dirent *de; | |
3770 | Hashmap *pids = NULL; | |
3771 | ||
3772 | assert(directory); | |
3773 | ||
650001c6 JJ |
3774 | /* Executes all binaries in a directory in parallel and |
3775 | * waits for them to finish. */ | |
83cc030f LP |
3776 | |
3777 | if (!d) { | |
3778 | if (!(_d = opendir(directory))) { | |
3779 | ||
3780 | if (errno == ENOENT) | |
3781 | return; | |
3782 | ||
3783 | log_error("Failed to enumerate directory %s: %m", directory); | |
3784 | return; | |
3785 | } | |
3786 | ||
3787 | d = _d; | |
3788 | } | |
3789 | ||
3790 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
3791 | log_error("Failed to allocate set."); | |
3792 | goto finish; | |
3793 | } | |
3794 | ||
3795 | while ((de = readdir(d))) { | |
3796 | char *path; | |
3797 | pid_t pid; | |
3798 | int k; | |
3799 | ||
fb19a739 | 3800 | if (!dirent_is_file(de)) |
83cc030f LP |
3801 | continue; |
3802 | ||
3803 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 3804 | log_oom(); |
83cc030f LP |
3805 | continue; |
3806 | } | |
3807 | ||
3808 | if ((pid = fork()) < 0) { | |
3809 | log_error("Failed to fork: %m"); | |
3810 | free(path); | |
3811 | continue; | |
3812 | } | |
3813 | ||
3814 | if (pid == 0) { | |
3815 | char *_argv[2]; | |
3816 | /* Child */ | |
3817 | ||
3818 | if (!argv) { | |
3819 | _argv[0] = path; | |
3820 | _argv[1] = NULL; | |
3821 | argv = _argv; | |
3822 | } else | |
6edd7d0a | 3823 | argv[0] = path; |
83cc030f LP |
3824 | |
3825 | execv(path, argv); | |
3826 | ||
3827 | log_error("Failed to execute %s: %m", path); | |
3828 | _exit(EXIT_FAILURE); | |
3829 | } | |
3830 | ||
3831 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
3832 | ||
3833 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
3834 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
3835 | free(path); | |
3836 | } | |
3837 | } | |
3838 | ||
3839 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 3840 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
b92bea5d | 3841 | siginfo_t si = {}; |
83cc030f LP |
3842 | char *path; |
3843 | ||
ec3f9b53 | 3844 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
3845 | |
3846 | if (errno == EINTR) | |
3847 | continue; | |
3848 | ||
3849 | log_error("waitid() failed: %m"); | |
3850 | goto finish; | |
3851 | } | |
3852 | ||
3853 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 3854 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
3855 | if (si.si_code == CLD_EXITED) |
3856 | log_error("%s exited with exit status %i.", path, si.si_status); | |
3857 | else | |
3858 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
3859 | } else | |
3860 | log_debug("%s exited successfully.", path); | |
3861 | ||
3862 | free(path); | |
3863 | } | |
3864 | } | |
3865 | ||
3866 | finish: | |
3867 | if (_d) | |
3868 | closedir(_d); | |
3869 | ||
3870 | if (pids) | |
3871 | hashmap_free_free(pids); | |
3872 | } | |
3873 | ||
430c18ed LP |
3874 | int kill_and_sigcont(pid_t pid, int sig) { |
3875 | int r; | |
3876 | ||
3877 | r = kill(pid, sig) < 0 ? -errno : 0; | |
3878 | ||
3879 | if (r >= 0) | |
3880 | kill(pid, SIGCONT); | |
3881 | ||
3882 | return r; | |
3883 | } | |
3884 | ||
05feefe0 LP |
3885 | bool nulstr_contains(const char*nulstr, const char *needle) { |
3886 | const char *i; | |
3887 | ||
3888 | if (!nulstr) | |
3889 | return false; | |
3890 | ||
3891 | NULSTR_FOREACH(i, nulstr) | |
3892 | if (streq(i, needle)) | |
3893 | return true; | |
3894 | ||
3895 | return false; | |
3896 | } | |
3897 | ||
6faa1114 | 3898 | bool plymouth_running(void) { |
9408a2d2 | 3899 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
3900 | } |
3901 | ||
9beb3f4d LP |
3902 | char* strshorten(char *s, size_t l) { |
3903 | assert(s); | |
3904 | ||
3905 | if (l < strlen(s)) | |
3906 | s[l] = 0; | |
3907 | ||
3908 | return s; | |
3909 | } | |
3910 | ||
3911 | static bool hostname_valid_char(char c) { | |
3912 | return | |
3913 | (c >= 'a' && c <= 'z') || | |
3914 | (c >= 'A' && c <= 'Z') || | |
3915 | (c >= '0' && c <= '9') || | |
3916 | c == '-' || | |
3917 | c == '_' || | |
3918 | c == '.'; | |
3919 | } | |
3920 | ||
3921 | bool hostname_is_valid(const char *s) { | |
3922 | const char *p; | |
aa3c5cf8 | 3923 | bool dot; |
9beb3f4d LP |
3924 | |
3925 | if (isempty(s)) | |
3926 | return false; | |
3927 | ||
aa3c5cf8 LP |
3928 | for (p = s, dot = true; *p; p++) { |
3929 | if (*p == '.') { | |
3930 | if (dot) | |
3931 | return false; | |
3932 | ||
3933 | dot = true; | |
3934 | } else { | |
3935 | if (!hostname_valid_char(*p)) | |
3936 | return false; | |
3937 | ||
3938 | dot = false; | |
3939 | } | |
3940 | } | |
3941 | ||
3942 | if (dot) | |
3943 | return false; | |
9beb3f4d LP |
3944 | |
3945 | if (p-s > HOST_NAME_MAX) | |
3946 | return false; | |
3947 | ||
3948 | return true; | |
3949 | } | |
3950 | ||
e724b063 | 3951 | char* hostname_cleanup(char *s, bool lowercase) { |
9beb3f4d | 3952 | char *p, *d; |
cec4ead9 LP |
3953 | bool dot; |
3954 | ||
3955 | for (p = s, d = s, dot = true; *p; p++) { | |
3956 | if (*p == '.') { | |
e724b063 | 3957 | if (dot) |
cec4ead9 | 3958 | continue; |
9beb3f4d | 3959 | |
e724b063 | 3960 | *(d++) = '.'; |
cec4ead9 | 3961 | dot = true; |
e724b063 LP |
3962 | } else if (hostname_valid_char(*p)) { |
3963 | *(d++) = lowercase ? tolower(*p) : *p; | |
cec4ead9 | 3964 | dot = false; |
e724b063 | 3965 | } |
cec4ead9 | 3966 | |
cec4ead9 | 3967 | } |
9beb3f4d | 3968 | |
e724b063 LP |
3969 | if (dot && d > s) |
3970 | d[-1] = 0; | |
3971 | else | |
3972 | *d = 0; | |
3973 | ||
9beb3f4d | 3974 | strshorten(s, HOST_NAME_MAX); |
cec4ead9 | 3975 | |
9beb3f4d LP |
3976 | return s; |
3977 | } | |
3978 | ||
1325aa42 | 3979 | int pipe_eof(int fd) { |
1325aa42 | 3980 | int r; |
b92bea5d ZJS |
3981 | struct pollfd pollfd = { |
3982 | .fd = fd, | |
3983 | .events = POLLIN|POLLHUP, | |
3984 | }; | |
1325aa42 LP |
3985 | |
3986 | r = poll(&pollfd, 1, 0); | |
3987 | if (r < 0) | |
3988 | return -errno; | |
3989 | ||
3990 | if (r == 0) | |
3991 | return 0; | |
3992 | ||
3993 | return pollfd.revents & POLLHUP; | |
3994 | } | |
3995 | ||
8f2d43a0 | 3996 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b | 3997 | int r; |
b92bea5d ZJS |
3998 | struct pollfd pollfd = { |
3999 | .fd = fd, | |
4000 | .events = event, | |
4001 | }; | |
df50185b | 4002 | |
8f2d43a0 | 4003 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
4004 | if (r < 0) |
4005 | return -errno; | |
4006 | ||
4007 | if (r == 0) | |
4008 | return 0; | |
4009 | ||
4010 | return pollfd.revents; | |
4011 | } | |
4012 | ||
5a3ab509 LP |
4013 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4014 | FILE *f; | |
4015 | char *t; | |
4016 | const char *fn; | |
4017 | size_t k; | |
4018 | int fd; | |
4019 | ||
4020 | assert(path); | |
4021 | assert(_f); | |
4022 | assert(_temp_path); | |
4023 | ||
4024 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4025 | if (!t) | |
4026 | return -ENOMEM; | |
4027 | ||
9eb977db | 4028 | fn = path_get_file_name(path); |
5a3ab509 LP |
4029 | k = fn-path; |
4030 | memcpy(t, path, k); | |
4031 | t[k] = '.'; | |
4032 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4033 | ||
4034 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4035 | if (fd < 0) { | |
4036 | free(t); | |
4037 | return -errno; | |
4038 | } | |
4039 | ||
4040 | f = fdopen(fd, "we"); | |
4041 | if (!f) { | |
4042 | unlink(t); | |
4043 | free(t); | |
4044 | return -errno; | |
4045 | } | |
4046 | ||
4047 | *_f = f; | |
4048 | *_temp_path = t; | |
4049 | ||
4050 | return 0; | |
4051 | } | |
4052 | ||
6ea832a2 | 4053 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4054 | assert(fd >= 0); |
4055 | ||
6ea832a2 LP |
4056 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4057 | return -errno; | |
4058 | ||
4059 | return 0; | |
4060 | } | |
4061 | ||
4062 | int terminal_vhangup(const char *name) { | |
4063 | int fd, r; | |
4064 | ||
4065 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4066 | if (fd < 0) | |
4067 | return fd; | |
4068 | ||
4069 | r = terminal_vhangup_fd(fd); | |
4070 | close_nointr_nofail(fd); | |
4071 | ||
4072 | return r; | |
4073 | } | |
4074 | ||
4075 | int vt_disallocate(const char *name) { | |
4076 | int fd, r; | |
4077 | unsigned u; | |
6ea832a2 LP |
4078 | |
4079 | /* Deallocate the VT if possible. If not possible | |
4080 | * (i.e. because it is the active one), at least clear it | |
4081 | * entirely (including the scrollback buffer) */ | |
4082 | ||
b83bc4e9 LP |
4083 | if (!startswith(name, "/dev/")) |
4084 | return -EINVAL; | |
4085 | ||
4086 | if (!tty_is_vc(name)) { | |
4087 | /* So this is not a VT. I guess we cannot deallocate | |
4088 | * it then. But let's at least clear the screen */ | |
4089 | ||
4090 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4091 | if (fd < 0) | |
4092 | return fd; | |
4093 | ||
8585357a LP |
4094 | loop_write(fd, |
4095 | "\033[r" /* clear scrolling region */ | |
4096 | "\033[H" /* move home */ | |
4097 | "\033[2J", /* clear screen */ | |
4098 | 10, false); | |
b83bc4e9 LP |
4099 | close_nointr_nofail(fd); |
4100 | ||
4101 | return 0; | |
4102 | } | |
6ea832a2 LP |
4103 | |
4104 | if (!startswith(name, "/dev/tty")) | |
4105 | return -EINVAL; | |
4106 | ||
4107 | r = safe_atou(name+8, &u); | |
4108 | if (r < 0) | |
4109 | return r; | |
4110 | ||
4111 | if (u <= 0) | |
b83bc4e9 | 4112 | return -EINVAL; |
6ea832a2 | 4113 | |
b83bc4e9 | 4114 | /* Try to deallocate */ |
6ea832a2 LP |
4115 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4116 | if (fd < 0) | |
4117 | return fd; | |
4118 | ||
4119 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4120 | close_nointr_nofail(fd); |
6ea832a2 | 4121 | |
b83bc4e9 LP |
4122 | if (r >= 0) |
4123 | return 0; | |
6ea832a2 | 4124 | |
b83bc4e9 | 4125 | if (errno != EBUSY) |
6ea832a2 | 4126 | return -errno; |
6ea832a2 | 4127 | |
b83bc4e9 LP |
4128 | /* Couldn't deallocate, so let's clear it fully with |
4129 | * scrollback */ | |
4130 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4131 | if (fd < 0) |
b83bc4e9 | 4132 | return fd; |
6ea832a2 | 4133 | |
8585357a LP |
4134 | loop_write(fd, |
4135 | "\033[r" /* clear scrolling region */ | |
4136 | "\033[H" /* move home */ | |
4137 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4138 | 10, false); | |
b83bc4e9 | 4139 | close_nointr_nofail(fd); |
6ea832a2 | 4140 | |
b83bc4e9 | 4141 | return 0; |
6ea832a2 LP |
4142 | } |
4143 | ||
51045322 LP |
4144 | int copy_file(const char *from, const char *to, int flags) { |
4145 | _cleanup_close_ int fdf = -1; | |
4146 | int r, fdt; | |
34ca941c LP |
4147 | |
4148 | assert(from); | |
4149 | assert(to); | |
4150 | ||
4151 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4152 | if (fdf < 0) | |
4153 | return -errno; | |
4154 | ||
51045322 LP |
4155 | fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); |
4156 | if (fdt < 0) | |
34ca941c | 4157 | return -errno; |
34ca941c LP |
4158 | |
4159 | for (;;) { | |
4160 | char buf[PIPE_BUF]; | |
4161 | ssize_t n, k; | |
4162 | ||
4163 | n = read(fdf, buf, sizeof(buf)); | |
4164 | if (n < 0) { | |
4165 | r = -errno; | |
4166 | ||
34ca941c LP |
4167 | close_nointr(fdt); |
4168 | unlink(to); | |
4169 | ||
4170 | return r; | |
4171 | } | |
4172 | ||
4173 | if (n == 0) | |
4174 | break; | |
4175 | ||
4176 | errno = 0; | |
4177 | k = loop_write(fdt, buf, n, false); | |
4178 | if (n != k) { | |
4179 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4180 | ||
34ca941c | 4181 | close_nointr(fdt); |
34ca941c | 4182 | unlink(to); |
51045322 | 4183 | |
34ca941c LP |
4184 | return r; |
4185 | } | |
4186 | } | |
4187 | ||
34ca941c LP |
4188 | r = close_nointr(fdt); |
4189 | ||
4190 | if (r < 0) { | |
4191 | unlink(to); | |
4192 | return r; | |
4193 | } | |
4194 | ||
4195 | return 0; | |
4196 | } | |
4197 | ||
424a19f8 LP |
4198 | int symlink_atomic(const char *from, const char *to) { |
4199 | char *x; | |
4200 | _cleanup_free_ char *t; | |
34ca941c LP |
4201 | const char *fn; |
4202 | size_t k; | |
4203 | unsigned long long ull; | |
4204 | unsigned i; | |
4205 | int r; | |
4206 | ||
4207 | assert(from); | |
4208 | assert(to); | |
4209 | ||
4210 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4211 | if (!t) | |
4212 | return -ENOMEM; | |
4213 | ||
9eb977db | 4214 | fn = path_get_file_name(to); |
34ca941c LP |
4215 | k = fn-to; |
4216 | memcpy(t, to, k); | |
4217 | t[k] = '.'; | |
4218 | x = stpcpy(t+k+1, fn); | |
4219 | ||
4220 | ull = random_ull(); | |
4221 | for (i = 0; i < 16; i++) { | |
4222 | *(x++) = hexchar(ull & 0xF); | |
4223 | ull >>= 4; | |
4224 | } | |
4225 | ||
4226 | *x = 0; | |
4227 | ||
424a19f8 LP |
4228 | if (symlink(from, t) < 0) |
4229 | return -errno; | |
34ca941c LP |
4230 | |
4231 | if (rename(t, to) < 0) { | |
4232 | r = -errno; | |
4233 | unlink(t); | |
34ca941c LP |
4234 | return r; |
4235 | } | |
4236 | ||
424a19f8 | 4237 | return 0; |
34ca941c LP |
4238 | } |
4239 | ||
4d6d6518 LP |
4240 | bool display_is_local(const char *display) { |
4241 | assert(display); | |
4242 | ||
4243 | return | |
4244 | display[0] == ':' && | |
4245 | display[1] >= '0' && | |
4246 | display[1] <= '9'; | |
4247 | } | |
4248 | ||
4249 | int socket_from_display(const char *display, char **path) { | |
4250 | size_t k; | |
4251 | char *f, *c; | |
4252 | ||
4253 | assert(display); | |
4254 | assert(path); | |
4255 | ||
4256 | if (!display_is_local(display)) | |
4257 | return -EINVAL; | |
4258 | ||
4259 | k = strspn(display+1, "0123456789"); | |
4260 | ||
4261 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4262 | if (!f) | |
4263 | return -ENOMEM; | |
4264 | ||
4265 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4266 | memcpy(c, display+1, k); | |
4267 | c[k] = 0; | |
4268 | ||
4269 | *path = f; | |
4270 | ||
4271 | return 0; | |
4272 | } | |
4273 | ||
d05c5031 LP |
4274 | int get_user_creds( |
4275 | const char **username, | |
4276 | uid_t *uid, gid_t *gid, | |
4277 | const char **home, | |
4278 | const char **shell) { | |
4279 | ||
1cccf435 | 4280 | struct passwd *p; |
ddd88763 | 4281 | uid_t u; |
1cccf435 MV |
4282 | |
4283 | assert(username); | |
4284 | assert(*username); | |
1cccf435 MV |
4285 | |
4286 | /* We enforce some special rules for uid=0: in order to avoid | |
4287 | * NSS lookups for root we hardcode its data. */ | |
4288 | ||
4289 | if (streq(*username, "root") || streq(*username, "0")) { | |
4290 | *username = "root"; | |
4b67834e LP |
4291 | |
4292 | if (uid) | |
4293 | *uid = 0; | |
4294 | ||
4295 | if (gid) | |
4296 | *gid = 0; | |
4297 | ||
4298 | if (home) | |
4299 | *home = "/root"; | |
d05c5031 LP |
4300 | |
4301 | if (shell) | |
4302 | *shell = "/bin/sh"; | |
4303 | ||
1cccf435 MV |
4304 | return 0; |
4305 | } | |
4306 | ||
ddd88763 | 4307 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4308 | errno = 0; |
ddd88763 | 4309 | p = getpwuid(u); |
1cccf435 MV |
4310 | |
4311 | /* If there are multiple users with the same id, make | |
4312 | * sure to leave $USER to the configured value instead | |
4313 | * of the first occurrence in the database. However if | |
4314 | * the uid was configured by a numeric uid, then let's | |
4315 | * pick the real username from /etc/passwd. */ | |
4316 | if (p) | |
4317 | *username = p->pw_name; | |
4318 | } else { | |
4319 | errno = 0; | |
4320 | p = getpwnam(*username); | |
4321 | } | |
4322 | ||
4323 | if (!p) | |
8333c77e | 4324 | return errno > 0 ? -errno : -ESRCH; |
1cccf435 | 4325 | |
4b67834e LP |
4326 | if (uid) |
4327 | *uid = p->pw_uid; | |
4328 | ||
4329 | if (gid) | |
4330 | *gid = p->pw_gid; | |
4331 | ||
4332 | if (home) | |
4333 | *home = p->pw_dir; | |
4334 | ||
d05c5031 LP |
4335 | if (shell) |
4336 | *shell = p->pw_shell; | |
4337 | ||
4b67834e LP |
4338 | return 0; |
4339 | } | |
4340 | ||
59164be4 LP |
4341 | char* uid_to_name(uid_t uid) { |
4342 | struct passwd *p; | |
4343 | char *r; | |
4344 | ||
4345 | if (uid == 0) | |
4346 | return strdup("root"); | |
4347 | ||
4348 | p = getpwuid(uid); | |
4349 | if (p) | |
4350 | return strdup(p->pw_name); | |
4351 | ||
4352 | if (asprintf(&r, "%lu", (unsigned long) uid) < 0) | |
4353 | return NULL; | |
4354 | ||
4355 | return r; | |
4356 | } | |
4357 | ||
4468addc LP |
4358 | char* gid_to_name(gid_t gid) { |
4359 | struct group *p; | |
4360 | char *r; | |
4361 | ||
4362 | if (gid == 0) | |
4363 | return strdup("root"); | |
4364 | ||
4365 | p = getgrgid(gid); | |
4366 | if (p) | |
4367 | return strdup(p->gr_name); | |
4368 | ||
4369 | if (asprintf(&r, "%lu", (unsigned long) gid) < 0) | |
4370 | return NULL; | |
4371 | ||
4372 | return r; | |
4373 | } | |
4374 | ||
4b67834e LP |
4375 | int get_group_creds(const char **groupname, gid_t *gid) { |
4376 | struct group *g; | |
4377 | gid_t id; | |
4378 | ||
4379 | assert(groupname); | |
4380 | ||
4381 | /* We enforce some special rules for gid=0: in order to avoid | |
4382 | * NSS lookups for root we hardcode its data. */ | |
4383 | ||
4384 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4385 | *groupname = "root"; | |
4386 | ||
4387 | if (gid) | |
4388 | *gid = 0; | |
4389 | ||
4390 | return 0; | |
4391 | } | |
4392 | ||
4393 | if (parse_gid(*groupname, &id) >= 0) { | |
4394 | errno = 0; | |
4395 | g = getgrgid(id); | |
4396 | ||
4397 | if (g) | |
4398 | *groupname = g->gr_name; | |
4399 | } else { | |
4400 | errno = 0; | |
4401 | g = getgrnam(*groupname); | |
4402 | } | |
4403 | ||
4404 | if (!g) | |
8333c77e | 4405 | return errno > 0 ? -errno : -ESRCH; |
4b67834e LP |
4406 | |
4407 | if (gid) | |
4408 | *gid = g->gr_gid; | |
4409 | ||
1cccf435 MV |
4410 | return 0; |
4411 | } | |
4412 | ||
4468addc LP |
4413 | int in_gid(gid_t gid) { |
4414 | gid_t *gids; | |
43673799 LP |
4415 | int ngroups_max, r, i; |
4416 | ||
43673799 LP |
4417 | if (getgid() == gid) |
4418 | return 1; | |
4419 | ||
4420 | if (getegid() == gid) | |
4421 | return 1; | |
4422 | ||
4423 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4424 | assert(ngroups_max > 0); | |
4425 | ||
4426 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4427 | ||
4428 | r = getgroups(ngroups_max, gids); | |
4429 | if (r < 0) | |
4430 | return -errno; | |
4431 | ||
4432 | for (i = 0; i < r; i++) | |
4433 | if (gids[i] == gid) | |
4434 | return 1; | |
4435 | ||
4436 | return 0; | |
4437 | } | |
4438 | ||
4468addc LP |
4439 | int in_group(const char *name) { |
4440 | int r; | |
4441 | gid_t gid; | |
4442 | ||
4443 | r = get_group_creds(&name, &gid); | |
4444 | if (r < 0) | |
4445 | return r; | |
4446 | ||
4447 | return in_gid(gid); | |
4448 | } | |
4449 | ||
8092a428 | 4450 | int glob_exists(const char *path) { |
7fd1b19b | 4451 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 4452 | int k; |
8092a428 LP |
4453 | |
4454 | assert(path); | |
4455 | ||
8092a428 LP |
4456 | errno = 0; |
4457 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4458 | ||
4459 | if (k == GLOB_NOMATCH) | |
8d98da3f | 4460 | return 0; |
8092a428 | 4461 | else if (k == GLOB_NOSPACE) |
8d98da3f | 4462 | return -ENOMEM; |
8092a428 | 4463 | else if (k == 0) |
8d98da3f | 4464 | return !strv_isempty(g.gl_pathv); |
8092a428 | 4465 | else |
8d98da3f ZJS |
4466 | return errno ? -errno : -EIO; |
4467 | } | |
8092a428 | 4468 | |
8d98da3f ZJS |
4469 | int glob_extend(char ***strv, const char *path) { |
4470 | _cleanup_globfree_ glob_t g = {}; | |
4471 | int k; | |
4472 | char **p; | |
4473 | ||
4474 | errno = 0; | |
a8ccacf5 | 4475 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
4476 | |
4477 | if (k == GLOB_NOMATCH) | |
4478 | return -ENOENT; | |
4479 | else if (k == GLOB_NOSPACE) | |
4480 | return -ENOMEM; | |
4481 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
4482 | return errno ? -errno : -EIO; | |
4483 | ||
4484 | STRV_FOREACH(p, g.gl_pathv) { | |
4485 | k = strv_extend(strv, *p); | |
4486 | if (k < 0) | |
4487 | break; | |
4488 | } | |
4489 | ||
4490 | return k; | |
8092a428 LP |
4491 | } |
4492 | ||
83096483 LP |
4493 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4494 | struct stat st; | |
4495 | ||
4496 | assert(d); | |
4497 | assert(de); | |
4498 | ||
4499 | if (de->d_type != DT_UNKNOWN) | |
4500 | return 0; | |
4501 | ||
4502 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4503 | return -errno; | |
4504 | ||
4505 | de->d_type = | |
4506 | S_ISREG(st.st_mode) ? DT_REG : | |
4507 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4508 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4509 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4510 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4511 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4512 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4513 | DT_UNKNOWN; | |
4514 | ||
4515 | return 0; | |
4516 | } | |
4517 | ||
4518 | int in_search_path(const char *path, char **search) { | |
893fa014 ZJS |
4519 | char **i; |
4520 | _cleanup_free_ char *parent = NULL; | |
83096483 LP |
4521 | int r; |
4522 | ||
9eb977db | 4523 | r = path_get_parent(path, &parent); |
83096483 LP |
4524 | if (r < 0) |
4525 | return r; | |
4526 | ||
893fa014 ZJS |
4527 | STRV_FOREACH(i, search) |
4528 | if (path_equal(parent, *i)) | |
4529 | return 1; | |
83096483 | 4530 | |
893fa014 | 4531 | return 0; |
83096483 LP |
4532 | } |
4533 | ||
034a2a52 | 4534 | int get_files_in_directory(const char *path, char ***list) { |
893fa014 ZJS |
4535 | _cleanup_closedir_ DIR *d = NULL; |
4536 | size_t bufsize = 0, n = 0; | |
4537 | _cleanup_strv_free_ char **l = NULL; | |
034a2a52 LP |
4538 | |
4539 | assert(path); | |
d60ef526 LP |
4540 | |
4541 | /* Returns all files in a directory in *list, and the number | |
4542 | * of files as return value. If list is NULL returns only the | |
893fa014 | 4543 | * number. */ |
034a2a52 LP |
4544 | |
4545 | d = opendir(path); | |
8ea913b2 LP |
4546 | if (!d) |
4547 | return -errno; | |
4548 | ||
034a2a52 | 4549 | for (;;) { |
7d5e9c0f LP |
4550 | struct dirent *de; |
4551 | union dirent_storage buf; | |
034a2a52 LP |
4552 | int k; |
4553 | ||
7d5e9c0f | 4554 | k = readdir_r(d, &buf.de, &de); |
893fa014 ZJS |
4555 | assert(k >= 0); |
4556 | if (k > 0) | |
4557 | return -k; | |
034a2a52 LP |
4558 | if (!de) |
4559 | break; | |
4560 | ||
4561 | dirent_ensure_type(d, de); | |
4562 | ||
4563 | if (!dirent_is_file(de)) | |
4564 | continue; | |
4565 | ||
d60ef526 | 4566 | if (list) { |
893fa014 ZJS |
4567 | /* one extra slot is needed for the terminating NULL */ |
4568 | if (!GREEDY_REALLOC(l, bufsize, n + 2)) | |
4569 | return -ENOMEM; | |
034a2a52 | 4570 | |
893fa014 ZJS |
4571 | l[n] = strdup(de->d_name); |
4572 | if (!l[n]) | |
4573 | return -ENOMEM; | |
034a2a52 | 4574 | |
893fa014 | 4575 | l[++n] = NULL; |
d60ef526 | 4576 | } else |
893fa014 | 4577 | n++; |
034a2a52 LP |
4578 | } |
4579 | ||
893fa014 ZJS |
4580 | if (list) { |
4581 | *list = l; | |
4582 | l = NULL; /* avoid freeing */ | |
4583 | } | |
034a2a52 | 4584 | |
893fa014 | 4585 | return n; |
034a2a52 LP |
4586 | } |
4587 | ||
b7def684 | 4588 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4589 | va_list ap; |
4590 | size_t l; | |
4591 | char *r, *p; | |
4592 | ||
4593 | va_start(ap, x); | |
4594 | ||
4595 | if (x) { | |
4596 | l = strlen(x); | |
4597 | ||
4598 | for (;;) { | |
4599 | const char *t; | |
040f18ea | 4600 | size_t n; |
911a4828 LP |
4601 | |
4602 | t = va_arg(ap, const char *); | |
4603 | if (!t) | |
4604 | break; | |
4605 | ||
040f18ea | 4606 | n = strlen(t); |
e98055de LN |
4607 | if (n > ((size_t) -1) - l) { |
4608 | va_end(ap); | |
040f18ea | 4609 | return NULL; |
e98055de | 4610 | } |
040f18ea LP |
4611 | |
4612 | l += n; | |
911a4828 LP |
4613 | } |
4614 | } else | |
4615 | l = 0; | |
4616 | ||
4617 | va_end(ap); | |
4618 | ||
4619 | r = new(char, l+1); | |
4620 | if (!r) | |
4621 | return NULL; | |
4622 | ||
4623 | if (x) { | |
4624 | p = stpcpy(r, x); | |
4625 | ||
4626 | va_start(ap, x); | |
4627 | ||
4628 | for (;;) { | |
4629 | const char *t; | |
4630 | ||
4631 | t = va_arg(ap, const char *); | |
4632 | if (!t) | |
4633 | break; | |
4634 | ||
4635 | p = stpcpy(p, t); | |
4636 | } | |
8ea913b2 LP |
4637 | |
4638 | va_end(ap); | |
911a4828 LP |
4639 | } else |
4640 | r[0] = 0; | |
4641 | ||
4642 | return r; | |
4643 | } | |
4644 | ||
b636465b LP |
4645 | bool is_main_thread(void) { |
4646 | static __thread int cached = 0; | |
4647 | ||
4648 | if (_unlikely_(cached == 0)) | |
4649 | cached = getpid() == gettid() ? 1 : -1; | |
4650 | ||
4651 | return cached > 0; | |
4652 | } | |
4653 | ||
94959f0f LP |
4654 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4655 | char *p, *s; | |
4656 | int r; | |
4657 | unsigned n, m; | |
4658 | ||
4659 | assert(ret); | |
4660 | ||
4661 | /* If it has a queue this is good enough for us */ | |
4662 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4663 | return -ENOMEM; | |
4664 | ||
4665 | r = access(p, F_OK); | |
4666 | free(p); | |
4667 | ||
4668 | if (r >= 0) { | |
4669 | *ret = d; | |
4670 | return 0; | |
4671 | } | |
4672 | ||
4673 | /* If it is a partition find the originating device */ | |
4674 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4675 | return -ENOMEM; | |
4676 | ||
4677 | r = access(p, F_OK); | |
4678 | free(p); | |
4679 | ||
4680 | if (r < 0) | |
4681 | return -ENOENT; | |
4682 | ||
4683 | /* Get parent dev_t */ | |
4684 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4685 | return -ENOMEM; | |
4686 | ||
4687 | r = read_one_line_file(p, &s); | |
4688 | free(p); | |
4689 | ||
4690 | if (r < 0) | |
4691 | return r; | |
4692 | ||
4693 | r = sscanf(s, "%u:%u", &m, &n); | |
4694 | free(s); | |
4695 | ||
4696 | if (r != 2) | |
4697 | return -EINVAL; | |
4698 | ||
4699 | /* Only return this if it is really good enough for us. */ | |
4700 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4701 | return -ENOMEM; | |
4702 | ||
4703 | r = access(p, F_OK); | |
4704 | free(p); | |
4705 | ||
4706 | if (r >= 0) { | |
4707 | *ret = makedev(m, n); | |
4708 | return 0; | |
4709 | } | |
4710 | ||
4711 | return -ENOENT; | |
4712 | } | |
4713 | ||
8d53b453 | 4714 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4715 | struct stat st; |
4716 | ||
4717 | assert(p); | |
4718 | ||
4719 | if (lstat(p, &st) < 0) | |
4720 | return -errno; | |
4721 | ||
4722 | return | |
8d53b453 | 4723 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4724 | (st.st_mode & S_ISVTX); |
4725 | } | |
94959f0f | 4726 | |
f41607a6 LP |
4727 | static const char *const ioprio_class_table[] = { |
4728 | [IOPRIO_CLASS_NONE] = "none", | |
4729 | [IOPRIO_CLASS_RT] = "realtime", | |
4730 | [IOPRIO_CLASS_BE] = "best-effort", | |
4731 | [IOPRIO_CLASS_IDLE] = "idle" | |
4732 | }; | |
4733 | ||
f8b69d1d | 4734 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4735 | |
4736 | static const char *const sigchld_code_table[] = { | |
4737 | [CLD_EXITED] = "exited", | |
4738 | [CLD_KILLED] = "killed", | |
4739 | [CLD_DUMPED] = "dumped", | |
4740 | [CLD_TRAPPED] = "trapped", | |
4741 | [CLD_STOPPED] = "stopped", | |
4742 | [CLD_CONTINUED] = "continued", | |
4743 | }; | |
4744 | ||
4745 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4746 | ||
4747 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4748 | [LOG_FAC(LOG_KERN)] = "kern", | |
4749 | [LOG_FAC(LOG_USER)] = "user", | |
4750 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4751 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4752 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4753 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4754 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4755 | [LOG_FAC(LOG_NEWS)] = "news", | |
4756 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4757 | [LOG_FAC(LOG_CRON)] = "cron", | |
4758 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4759 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4760 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4761 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4762 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4763 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4764 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4765 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4766 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4767 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4768 | }; | |
4769 | ||
f8b69d1d | 4770 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4771 | |
4772 | static const char *const log_level_table[] = { | |
4773 | [LOG_EMERG] = "emerg", | |
4774 | [LOG_ALERT] = "alert", | |
4775 | [LOG_CRIT] = "crit", | |
4776 | [LOG_ERR] = "err", | |
4777 | [LOG_WARNING] = "warning", | |
4778 | [LOG_NOTICE] = "notice", | |
4779 | [LOG_INFO] = "info", | |
4780 | [LOG_DEBUG] = "debug" | |
4781 | }; | |
4782 | ||
f8b69d1d | 4783 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4784 | |
4785 | static const char* const sched_policy_table[] = { | |
4786 | [SCHED_OTHER] = "other", | |
4787 | [SCHED_BATCH] = "batch", | |
4788 | [SCHED_IDLE] = "idle", | |
4789 | [SCHED_FIFO] = "fifo", | |
4790 | [SCHED_RR] = "rr" | |
4791 | }; | |
4792 | ||
f8b69d1d | 4793 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 LP |
4794 | |
4795 | static const char* const rlimit_table[] = { | |
4796 | [RLIMIT_CPU] = "LimitCPU", | |
4797 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4798 | [RLIMIT_DATA] = "LimitDATA", | |
4799 | [RLIMIT_STACK] = "LimitSTACK", | |
4800 | [RLIMIT_CORE] = "LimitCORE", | |
4801 | [RLIMIT_RSS] = "LimitRSS", | |
4802 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4803 | [RLIMIT_AS] = "LimitAS", | |
4804 | [RLIMIT_NPROC] = "LimitNPROC", | |
4805 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4806 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4807 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4808 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4809 | [RLIMIT_NICE] = "LimitNICE", | |
4810 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4811 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4812 | }; | |
4813 | ||
4814 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4815 | ||
4816 | static const char* const ip_tos_table[] = { | |
4817 | [IPTOS_LOWDELAY] = "low-delay", | |
4818 | [IPTOS_THROUGHPUT] = "throughput", | |
4819 | [IPTOS_RELIABILITY] = "reliability", | |
4820 | [IPTOS_LOWCOST] = "low-cost", | |
4821 | }; | |
4822 | ||
f8b69d1d | 4823 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4824 | |
4e240ab0 | 4825 | static const char *const __signal_table[] = { |
f41607a6 LP |
4826 | [SIGHUP] = "HUP", |
4827 | [SIGINT] = "INT", | |
4828 | [SIGQUIT] = "QUIT", | |
4829 | [SIGILL] = "ILL", | |
4830 | [SIGTRAP] = "TRAP", | |
4831 | [SIGABRT] = "ABRT", | |
4832 | [SIGBUS] = "BUS", | |
4833 | [SIGFPE] = "FPE", | |
4834 | [SIGKILL] = "KILL", | |
4835 | [SIGUSR1] = "USR1", | |
4836 | [SIGSEGV] = "SEGV", | |
4837 | [SIGUSR2] = "USR2", | |
4838 | [SIGPIPE] = "PIPE", | |
4839 | [SIGALRM] = "ALRM", | |
4840 | [SIGTERM] = "TERM", | |
4841 | #ifdef SIGSTKFLT | |
4842 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4843 | #endif | |
4844 | [SIGCHLD] = "CHLD", | |
4845 | [SIGCONT] = "CONT", | |
4846 | [SIGSTOP] = "STOP", | |
4847 | [SIGTSTP] = "TSTP", | |
4848 | [SIGTTIN] = "TTIN", | |
4849 | [SIGTTOU] = "TTOU", | |
4850 | [SIGURG] = "URG", | |
4851 | [SIGXCPU] = "XCPU", | |
4852 | [SIGXFSZ] = "XFSZ", | |
4853 | [SIGVTALRM] = "VTALRM", | |
4854 | [SIGPROF] = "PROF", | |
4855 | [SIGWINCH] = "WINCH", | |
4856 | [SIGIO] = "IO", | |
4857 | [SIGPWR] = "PWR", | |
4858 | [SIGSYS] = "SYS" | |
4859 | }; | |
4860 | ||
4e240ab0 MS |
4861 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4862 | ||
4863 | const char *signal_to_string(int signo) { | |
fa70beaa | 4864 | static __thread char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1]; |
4e240ab0 MS |
4865 | const char *name; |
4866 | ||
4867 | name = __signal_to_string(signo); | |
4868 | if (name) | |
4869 | return name; | |
4870 | ||
4871 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
fa70beaa | 4872 | snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN); |
4e240ab0 | 4873 | else |
fa70beaa LP |
4874 | snprintf(buf, sizeof(buf), "%d", signo); |
4875 | ||
4e240ab0 MS |
4876 | return buf; |
4877 | } | |
4878 | ||
4879 | int signal_from_string(const char *s) { | |
4880 | int signo; | |
4881 | int offset = 0; | |
4882 | unsigned u; | |
4883 | ||
040f18ea | 4884 | signo = __signal_from_string(s); |
4e240ab0 MS |
4885 | if (signo > 0) |
4886 | return signo; | |
4887 | ||
4888 | if (startswith(s, "RTMIN+")) { | |
4889 | s += 6; | |
4890 | offset = SIGRTMIN; | |
4891 | } | |
4892 | if (safe_atou(s, &u) >= 0) { | |
4893 | signo = (int) u + offset; | |
4894 | if (signo > 0 && signo < _NSIG) | |
4895 | return signo; | |
4896 | } | |
4897 | return -1; | |
4898 | } | |
65457142 FC |
4899 | |
4900 | bool kexec_loaded(void) { | |
4901 | bool loaded = false; | |
4902 | char *s; | |
4903 | ||
4904 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
4905 | if (s[0] == '1') | |
4906 | loaded = true; | |
4907 | free(s); | |
4908 | } | |
4909 | return loaded; | |
4910 | } | |
fb9de93d LP |
4911 | |
4912 | int strdup_or_null(const char *a, char **b) { | |
4913 | char *c; | |
4914 | ||
4915 | assert(b); | |
4916 | ||
4917 | if (!a) { | |
4918 | *b = NULL; | |
4919 | return 0; | |
4920 | } | |
4921 | ||
4922 | c = strdup(a); | |
4923 | if (!c) | |
4924 | return -ENOMEM; | |
4925 | ||
4926 | *b = c; | |
4927 | return 0; | |
4928 | } | |
64685e0c | 4929 | |
87d2c1ff LP |
4930 | int prot_from_flags(int flags) { |
4931 | ||
4932 | switch (flags & O_ACCMODE) { | |
4933 | ||
4934 | case O_RDONLY: | |
4935 | return PROT_READ; | |
4936 | ||
4937 | case O_WRONLY: | |
4938 | return PROT_WRITE; | |
4939 | ||
4940 | case O_RDWR: | |
4941 | return PROT_READ|PROT_WRITE; | |
4942 | ||
4943 | default: | |
4944 | return -EINVAL; | |
4945 | } | |
7c99e0c1 | 4946 | } |
689b9a22 | 4947 | |
babfc091 | 4948 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 4949 | unsigned i; |
babfc091 LP |
4950 | |
4951 | static const struct { | |
4952 | const char *suffix; | |
4953 | off_t factor; | |
4954 | } table[] = { | |
32895bb3 LP |
4955 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
4956 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
4957 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
4958 | { "G", 1024ULL*1024ULL*1024ULL }, | |
4959 | { "M", 1024ULL*1024ULL }, | |
4960 | { "K", 1024ULL }, | |
4961 | }; | |
4962 | ||
4963 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
4964 | ||
4965 | if (t >= table[i].factor) { | |
4966 | snprintf(buf, l, | |
4967 | "%llu.%llu%s", | |
4968 | (unsigned long long) (t / table[i].factor), | |
4969 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
4970 | table[i].suffix); | |
4971 | ||
4972 | goto finish; | |
4973 | } | |
4974 | } | |
4975 | ||
4976 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
4977 | ||
4978 | finish: | |
4979 | buf[l-1] = 0; | |
4980 | return buf; | |
4981 | ||
4982 | } | |
55d7bfc1 LP |
4983 | |
4984 | void* memdup(const void *p, size_t l) { | |
4985 | void *r; | |
4986 | ||
4987 | assert(p); | |
4988 | ||
4989 | r = malloc(l); | |
4990 | if (!r) | |
4991 | return NULL; | |
4992 | ||
4993 | memcpy(r, p, l); | |
4994 | return r; | |
4995 | } | |
bb99a35a LP |
4996 | |
4997 | int fd_inc_sndbuf(int fd, size_t n) { | |
4998 | int r, value; | |
4999 | socklen_t l = sizeof(value); | |
5000 | ||
5001 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
5002 | if (r >= 0 && | |
5003 | l == sizeof(value) && | |
5004 | (size_t) value >= n*2) | |
5005 | return 0; | |
5006 | ||
5007 | value = (int) n; | |
5008 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
5009 | if (r < 0) | |
5010 | return -errno; | |
5011 | ||
5012 | return 1; | |
5013 | } | |
5014 | ||
5015 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5016 | int r, value; | |
5017 | socklen_t l = sizeof(value); | |
5018 | ||
5019 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
5020 | if (r >= 0 && | |
5021 | l == sizeof(value) && | |
5022 | (size_t) value >= n*2) | |
5023 | return 0; | |
5024 | ||
5025 | value = (int) n; | |
5026 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
5027 | if (r < 0) | |
5028 | return -errno; | |
5029 | ||
5030 | return 1; | |
5031 | } | |
6bb92a16 | 5032 | |
9bdc770c | 5033 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
5034 | pid_t parent_pid, agent_pid; |
5035 | int fd; | |
5036 | bool stdout_is_tty, stderr_is_tty; | |
5037 | unsigned n, i; | |
5038 | va_list ap; | |
5039 | char **l; | |
5040 | ||
5041 | assert(pid); | |
5042 | assert(path); | |
5043 | ||
5044 | parent_pid = getpid(); | |
5045 | ||
5046 | /* Spawns a temporary TTY agent, making sure it goes away when | |
5047 | * we go away */ | |
5048 | ||
5049 | agent_pid = fork(); | |
5050 | if (agent_pid < 0) | |
5051 | return -errno; | |
5052 | ||
5053 | if (agent_pid != 0) { | |
5054 | *pid = agent_pid; | |
5055 | return 0; | |
5056 | } | |
5057 | ||
5058 | /* In the child: | |
5059 | * | |
5060 | * Make sure the agent goes away when the parent dies */ | |
5061 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5062 | _exit(EXIT_FAILURE); | |
5063 | ||
5064 | /* Check whether our parent died before we were able | |
5065 | * to set the death signal */ | |
5066 | if (getppid() != parent_pid) | |
5067 | _exit(EXIT_SUCCESS); | |
5068 | ||
5069 | /* Don't leak fds to the agent */ | |
9bdc770c | 5070 | close_all_fds(except, n_except); |
6bb92a16 LP |
5071 | |
5072 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5073 | stderr_is_tty = isatty(STDERR_FILENO); | |
5074 | ||
5075 | if (!stdout_is_tty || !stderr_is_tty) { | |
5076 | /* Detach from stdout/stderr. and reopen | |
5077 | * /dev/tty for them. This is important to | |
5078 | * ensure that when systemctl is started via | |
5079 | * popen() or a similar call that expects to | |
5080 | * read EOF we actually do generate EOF and | |
5081 | * not delay this indefinitely by because we | |
5082 | * keep an unused copy of stdin around. */ | |
5083 | fd = open("/dev/tty", O_WRONLY); | |
5084 | if (fd < 0) { | |
5085 | log_error("Failed to open /dev/tty: %m"); | |
5086 | _exit(EXIT_FAILURE); | |
5087 | } | |
5088 | ||
5089 | if (!stdout_is_tty) | |
5090 | dup2(fd, STDOUT_FILENO); | |
5091 | ||
5092 | if (!stderr_is_tty) | |
5093 | dup2(fd, STDERR_FILENO); | |
5094 | ||
5095 | if (fd > 2) | |
5096 | close(fd); | |
5097 | } | |
5098 | ||
5099 | /* Count arguments */ | |
5100 | va_start(ap, path); | |
5101 | for (n = 0; va_arg(ap, char*); n++) | |
5102 | ; | |
5103 | va_end(ap); | |
5104 | ||
5105 | /* Allocate strv */ | |
5106 | l = alloca(sizeof(char *) * (n + 1)); | |
5107 | ||
5108 | /* Fill in arguments */ | |
5109 | va_start(ap, path); | |
5110 | for (i = 0; i <= n; i++) | |
5111 | l[i] = va_arg(ap, char*); | |
5112 | va_end(ap); | |
5113 | ||
5114 | execv(path, l); | |
5115 | _exit(EXIT_FAILURE); | |
5116 | } | |
68faf98c LP |
5117 | |
5118 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5119 | struct rlimit highest, fixed; | |
5120 | ||
5121 | assert(rlim); | |
5122 | ||
5123 | if (setrlimit(resource, rlim) >= 0) | |
5124 | return 0; | |
5125 | ||
5126 | if (errno != EPERM) | |
5127 | return -errno; | |
5128 | ||
5129 | /* So we failed to set the desired setrlimit, then let's try | |
5130 | * to get as close as we can */ | |
5131 | assert_se(getrlimit(resource, &highest) == 0); | |
5132 | ||
5133 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5134 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5135 | ||
5136 | if (setrlimit(resource, &fixed) < 0) | |
5137 | return -errno; | |
5138 | ||
5139 | return 0; | |
5140 | } | |
3d9a4122 | 5141 | |
ab94af92 | 5142 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
49aa47c7 LP |
5143 | _cleanup_fclose_ FILE *f = NULL; |
5144 | char *value = NULL; | |
ab94af92 | 5145 | int r; |
ab94af92 LP |
5146 | bool done = false; |
5147 | size_t l; | |
49aa47c7 | 5148 | const char *path; |
ab94af92 | 5149 | |
49aa47c7 | 5150 | assert(pid >= 0); |
ab94af92 LP |
5151 | assert(field); |
5152 | assert(_value); | |
5153 | ||
5154 | if (pid == 0) | |
49aa47c7 LP |
5155 | path = "/proc/self/environ"; |
5156 | else | |
5157 | path = procfs_file_alloca(pid, "environ"); | |
ab94af92 LP |
5158 | |
5159 | f = fopen(path, "re"); | |
5160 | if (!f) | |
5161 | return -errno; | |
5162 | ||
5163 | l = strlen(field); | |
5164 | r = 0; | |
5165 | ||
5166 | do { | |
5167 | char line[LINE_MAX]; | |
5168 | unsigned i; | |
5169 | ||
5170 | for (i = 0; i < sizeof(line)-1; i++) { | |
5171 | int c; | |
5172 | ||
5173 | c = getc(f); | |
5174 | if (_unlikely_(c == EOF)) { | |
5175 | done = true; | |
5176 | break; | |
5177 | } else if (c == 0) | |
5178 | break; | |
5179 | ||
5180 | line[i] = c; | |
5181 | } | |
5182 | line[i] = 0; | |
5183 | ||
5184 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5185 | value = strdup(line + l + 1); | |
49aa47c7 LP |
5186 | if (!value) |
5187 | return -ENOMEM; | |
ab94af92 LP |
5188 | |
5189 | r = 1; | |
5190 | break; | |
5191 | } | |
5192 | ||
5193 | } while (!done); | |
5194 | ||
49aa47c7 | 5195 | *_value = value; |
ab94af92 LP |
5196 | return r; |
5197 | } | |
d889a206 | 5198 | |
49dbfa7b LP |
5199 | bool is_valid_documentation_url(const char *url) { |
5200 | assert(url); | |
5201 | ||
5202 | if (startswith(url, "http://") && url[7]) | |
5203 | return true; | |
5204 | ||
5205 | if (startswith(url, "https://") && url[8]) | |
5206 | return true; | |
5207 | ||
5208 | if (startswith(url, "file:") && url[5]) | |
5209 | return true; | |
5210 | ||
5211 | if (startswith(url, "info:") && url[5]) | |
5212 | return true; | |
5213 | ||
5214 | if (startswith(url, "man:") && url[4]) | |
5215 | return true; | |
5216 | ||
5217 | return false; | |
5218 | } | |
9be346c9 HH |
5219 | |
5220 | bool in_initrd(void) { | |
a05f97b3 | 5221 | static __thread int saved = -1; |
825c6fe5 | 5222 | struct statfs s; |
8f33b5b8 | 5223 | |
825c6fe5 LP |
5224 | if (saved >= 0) |
5225 | return saved; | |
5226 | ||
5227 | /* We make two checks here: | |
5228 | * | |
5229 | * 1. the flag file /etc/initrd-release must exist | |
5230 | * 2. the root file system must be a memory file system | |
5231 | * | |
5232 | * The second check is extra paranoia, since misdetecting an | |
5233 | * initrd can have bad bad consequences due the initrd | |
5234 | * emptying when transititioning to the main systemd. | |
5235 | */ | |
5236 | ||
5237 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5238 | statfs("/", &s) >= 0 && | |
943aad8c | 5239 | is_temporary_fs(&s); |
9be346c9 | 5240 | |
8f33b5b8 | 5241 | return saved; |
9be346c9 | 5242 | } |
069cfc85 LP |
5243 | |
5244 | void warn_melody(void) { | |
e67f47e5 | 5245 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5246 | |
5247 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5248 | if (fd < 0) | |
5249 | return; | |
5250 | ||
040f18ea | 5251 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5252 | |
5253 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5254 | usleep(125*USEC_PER_MSEC); | |
5255 | ||
5256 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5257 | usleep(125*USEC_PER_MSEC); | |
5258 | ||
5259 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5260 | usleep(125*USEC_PER_MSEC); | |
5261 | ||
5262 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5263 | } |
cd3bd60a LP |
5264 | |
5265 | int make_console_stdio(void) { | |
5266 | int fd, r; | |
5267 | ||
5268 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5269 | ||
5270 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5271 | if (fd < 0) { | |
5272 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5273 | return fd; | |
5274 | } | |
5275 | ||
5276 | r = make_stdio(fd); | |
5277 | if (r < 0) { | |
5278 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5279 | return r; | |
5280 | } | |
5281 | ||
5282 | return 0; | |
5283 | } | |
7c5f152a LP |
5284 | |
5285 | int get_home_dir(char **_h) { | |
5286 | char *h; | |
5287 | const char *e; | |
5288 | uid_t u; | |
5289 | struct passwd *p; | |
5290 | ||
5291 | assert(_h); | |
5292 | ||
5293 | /* Take the user specified one */ | |
5294 | e = getenv("HOME"); | |
5295 | if (e) { | |
5296 | h = strdup(e); | |
5297 | if (!h) | |
5298 | return -ENOMEM; | |
5299 | ||
5300 | *_h = h; | |
5301 | return 0; | |
5302 | } | |
5303 | ||
5304 | /* Hardcode home directory for root to avoid NSS */ | |
5305 | u = getuid(); | |
5306 | if (u == 0) { | |
5307 | h = strdup("/root"); | |
5308 | if (!h) | |
5309 | return -ENOMEM; | |
5310 | ||
5311 | *_h = h; | |
5312 | return 0; | |
5313 | } | |
5314 | ||
5315 | /* Check the database... */ | |
5316 | errno = 0; | |
5317 | p = getpwuid(u); | |
5318 | if (!p) | |
bcb161b0 | 5319 | return errno > 0 ? -errno : -ESRCH; |
7c5f152a LP |
5320 | |
5321 | if (!path_is_absolute(p->pw_dir)) | |
5322 | return -EINVAL; | |
5323 | ||
5324 | h = strdup(p->pw_dir); | |
5325 | if (!h) | |
5326 | return -ENOMEM; | |
5327 | ||
5328 | *_h = h; | |
5329 | return 0; | |
5330 | } | |
5331 | ||
0b507b17 LP |
5332 | bool filename_is_safe(const char *p) { |
5333 | ||
5334 | if (isempty(p)) | |
5335 | return false; | |
5336 | ||
5337 | if (strchr(p, '/')) | |
5338 | return false; | |
5339 | ||
5340 | if (streq(p, ".")) | |
5341 | return false; | |
5342 | ||
5343 | if (streq(p, "..")) | |
5344 | return false; | |
5345 | ||
5346 | if (strlen(p) > FILENAME_MAX) | |
5347 | return false; | |
5348 | ||
5349 | return true; | |
5350 | } | |
5351 | ||
5352 | bool string_is_safe(const char *p) { | |
5353 | const char *t; | |
5354 | ||
5355 | assert(p); | |
5356 | ||
5357 | for (t = p; *t; t++) { | |
01539d6e | 5358 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5359 | return false; |
5360 | ||
011afa76 | 5361 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5362 | return false; |
5363 | } | |
5364 | ||
5365 | return true; | |
5366 | } | |
cfbc22ab | 5367 | |
ac4c8d6d ZJS |
5368 | /** |
5369 | * Check if a string contains control characters. | |
5370 | * Spaces and tabs are not considered control characters. | |
5371 | */ | |
4d1a6904 LP |
5372 | bool string_has_cc(const char *p) { |
5373 | const char *t; | |
5374 | ||
5375 | assert(p); | |
5376 | ||
5377 | for (t = p; *t; t++) | |
da2620a5 | 5378 | if (*t > 0 && *t < ' ' && *t != '\t') |
4d1a6904 LP |
5379 | return true; |
5380 | ||
5381 | return false; | |
5382 | } | |
5383 | ||
e884315e LP |
5384 | bool path_is_safe(const char *p) { |
5385 | ||
5386 | if (isempty(p)) | |
5387 | return false; | |
5388 | ||
5389 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5390 | return false; | |
5391 | ||
5392 | if (strlen(p) > PATH_MAX) | |
5393 | return false; | |
5394 | ||
5395 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5396 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5397 | return false; | |
5398 | ||
5399 | if (strstr(p, "//")) | |
5400 | return false; | |
5401 | ||
5402 | return true; | |
5403 | } | |
5404 | ||
a9e12476 KS |
5405 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5406 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5407 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5408 | size_t l, u, idx; |
5409 | const void *p; | |
5410 | int comparison; | |
5411 | ||
5412 | l = 0; | |
5413 | u = nmemb; | |
5414 | while (l < u) { | |
5415 | idx = (l + u) / 2; | |
5416 | p = (void *)(((const char *) base) + (idx * size)); | |
5417 | comparison = compar(key, p, arg); | |
5418 | if (comparison < 0) | |
5419 | u = idx; | |
5420 | else if (comparison > 0) | |
5421 | l = idx + 1; | |
5422 | else | |
5423 | return (void *)p; | |
5424 | } | |
5425 | return NULL; | |
5426 | } | |
09017585 MS |
5427 | |
5428 | bool is_locale_utf8(void) { | |
5429 | const char *set; | |
5430 | static int cached_answer = -1; | |
5431 | ||
5432 | if (cached_answer >= 0) | |
5433 | goto out; | |
5434 | ||
5435 | if (!setlocale(LC_ALL, "")) { | |
5436 | cached_answer = true; | |
5437 | goto out; | |
5438 | } | |
5439 | ||
5440 | set = nl_langinfo(CODESET); | |
5441 | if (!set) { | |
5442 | cached_answer = true; | |
5443 | goto out; | |
5444 | } | |
5445 | ||
fee79e01 HH |
5446 | if(streq(set, "UTF-8")) { |
5447 | cached_answer = true; | |
5448 | goto out; | |
5449 | } | |
5450 | ||
6cf2f1d9 HH |
5451 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
5452 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
5453 | set = setlocale(LC_CTYPE, NULL); |
5454 | if (!set) { | |
5455 | cached_answer = true; | |
5456 | goto out; | |
5457 | } | |
5458 | ||
6cf2f1d9 HH |
5459 | /* Check result, but ignore the result if C was set |
5460 | * explicitly. */ | |
5461 | cached_answer = | |
5462 | streq(set, "C") && | |
5463 | !getenv("LC_ALL") && | |
5464 | !getenv("LC_CTYPE") && | |
5465 | !getenv("LANG"); | |
fee79e01 | 5466 | |
09017585 | 5467 | out: |
6cf2f1d9 | 5468 | return (bool) cached_answer; |
09017585 | 5469 | } |
c339d977 MS |
5470 | |
5471 | const char *draw_special_char(DrawSpecialChar ch) { | |
5472 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
5473 | /* UTF-8 */ { | |
45a5ff0d MS |
5474 | [DRAW_TREE_VERT] = "\342\224\202 ", /* │ */ |
5475 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ | |
5476 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5477 | [DRAW_TREE_SPACE] = " ", /* */ |
45a5ff0d | 5478 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243 ", /* ‣ */ |
3deadb91 | 5479 | [DRAW_BLACK_CIRCLE] = "\342\227\217 ", /* ● */ |
c339d977 MS |
5480 | }, |
5481 | /* ASCII fallback */ { | |
45a5ff0d MS |
5482 | [DRAW_TREE_VERT] = "| ", |
5483 | [DRAW_TREE_BRANCH] = "|-", | |
5484 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5485 | [DRAW_TREE_SPACE] = " ", |
45a5ff0d | 5486 | [DRAW_TRIANGULAR_BULLET] = "> ", |
3deadb91 | 5487 | [DRAW_BLACK_CIRCLE] = "* ", |
c339d977 MS |
5488 | } |
5489 | }; | |
5490 | ||
5491 | return draw_table[!is_locale_utf8()][ch]; | |
5492 | } | |
409bc9c3 LP |
5493 | |
5494 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5495 | const char *f; | |
5496 | char *t, *r; | |
5497 | size_t l, old_len, new_len; | |
5498 | ||
5499 | assert(text); | |
5500 | assert(old_string); | |
5501 | assert(new_string); | |
5502 | ||
5503 | old_len = strlen(old_string); | |
5504 | new_len = strlen(new_string); | |
5505 | ||
5506 | l = strlen(text); | |
5507 | r = new(char, l+1); | |
5508 | if (!r) | |
5509 | return NULL; | |
5510 | ||
5511 | f = text; | |
5512 | t = r; | |
5513 | while (*f) { | |
5514 | char *a; | |
5515 | size_t d, nl; | |
5516 | ||
5517 | if (!startswith(f, old_string)) { | |
5518 | *(t++) = *(f++); | |
5519 | continue; | |
5520 | } | |
5521 | ||
5522 | d = t - r; | |
5523 | nl = l - old_len + new_len; | |
5524 | a = realloc(r, nl + 1); | |
5525 | if (!a) | |
5526 | goto oom; | |
5527 | ||
5528 | l = nl; | |
5529 | r = a; | |
5530 | t = r + d; | |
5531 | ||
5532 | t = stpcpy(t, new_string); | |
5533 | f += old_len; | |
5534 | } | |
5535 | ||
5536 | *t = 0; | |
5537 | return r; | |
5538 | ||
5539 | oom: | |
5540 | free(r); | |
5541 | return NULL; | |
5542 | } | |
e8bc0ea2 LP |
5543 | |
5544 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5545 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5546 | enum { |
5547 | STATE_OTHER, | |
5548 | STATE_ESCAPE, | |
5549 | STATE_BRACKET | |
5550 | } state = STATE_OTHER; | |
5551 | char *obuf = NULL; | |
5552 | size_t osz = 0, isz; | |
5553 | FILE *f; | |
5554 | ||
5555 | assert(ibuf); | |
5556 | assert(*ibuf); | |
5557 | ||
5558 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5559 | ||
5560 | isz = _isz ? *_isz : strlen(*ibuf); | |
5561 | ||
5562 | f = open_memstream(&obuf, &osz); | |
5563 | if (!f) | |
5564 | return NULL; | |
5565 | ||
5566 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5567 | ||
5568 | switch (state) { | |
5569 | ||
5570 | case STATE_OTHER: | |
5571 | if (i >= *ibuf + isz) /* EOT */ | |
5572 | break; | |
5573 | else if (*i == '\x1B') | |
5574 | state = STATE_ESCAPE; | |
5575 | else if (*i == '\t') | |
5576 | fputs(" ", f); | |
5577 | else | |
5578 | fputc(*i, f); | |
5579 | break; | |
5580 | ||
5581 | case STATE_ESCAPE: | |
5582 | if (i >= *ibuf + isz) { /* EOT */ | |
5583 | fputc('\x1B', f); | |
5584 | break; | |
5585 | } else if (*i == '[') { | |
5586 | state = STATE_BRACKET; | |
5587 | begin = i + 1; | |
5588 | } else { | |
5589 | fputc('\x1B', f); | |
5590 | fputc(*i, f); | |
5591 | state = STATE_OTHER; | |
5592 | } | |
5593 | ||
5594 | break; | |
5595 | ||
5596 | case STATE_BRACKET: | |
5597 | ||
5598 | if (i >= *ibuf + isz || /* EOT */ | |
5599 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5600 | fputc('\x1B', f); | |
5601 | fputc('[', f); | |
5602 | state = STATE_OTHER; | |
5603 | i = begin-1; | |
5604 | } else if (*i == 'm') | |
5605 | state = STATE_OTHER; | |
5606 | break; | |
5607 | } | |
5608 | } | |
5609 | ||
5610 | if (ferror(f)) { | |
5611 | fclose(f); | |
5612 | free(obuf); | |
5613 | return NULL; | |
5614 | } | |
5615 | ||
5616 | fclose(f); | |
5617 | ||
5618 | free(*ibuf); | |
5619 | *ibuf = obuf; | |
5620 | ||
5621 | if (_isz) | |
5622 | *_isz = osz; | |
5623 | ||
5624 | return obuf; | |
5625 | } | |
240dbaa4 LP |
5626 | |
5627 | int on_ac_power(void) { | |
5628 | bool found_offline = false, found_online = false; | |
5629 | _cleanup_closedir_ DIR *d = NULL; | |
5630 | ||
5631 | d = opendir("/sys/class/power_supply"); | |
5632 | if (!d) | |
5633 | return -errno; | |
5634 | ||
5635 | for (;;) { | |
5636 | struct dirent *de; | |
5637 | union dirent_storage buf; | |
240dbaa4 LP |
5638 | _cleanup_close_ int fd = -1, device = -1; |
5639 | char contents[6]; | |
5640 | ssize_t n; | |
5641 | int k; | |
5642 | ||
5643 | k = readdir_r(d, &buf.de, &de); | |
5644 | if (k != 0) | |
5645 | return -k; | |
5646 | ||
5647 | if (!de) | |
5648 | break; | |
5649 | ||
5650 | if (ignore_file(de->d_name)) | |
5651 | continue; | |
5652 | ||
5653 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5654 | if (device < 0) { | |
5655 | if (errno == ENOENT || errno == ENOTDIR) | |
5656 | continue; | |
5657 | ||
5658 | return -errno; | |
5659 | } | |
5660 | ||
5661 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5662 | if (fd < 0) { | |
5663 | if (errno == ENOENT) | |
5664 | continue; | |
5665 | ||
5666 | return -errno; | |
5667 | } | |
5668 | ||
5669 | n = read(fd, contents, sizeof(contents)); | |
5670 | if (n < 0) | |
5671 | return -errno; | |
5672 | ||
5673 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5674 | continue; | |
5675 | ||
5676 | close_nointr_nofail(fd); | |
5677 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5678 | if (fd < 0) { | |
5679 | if (errno == ENOENT) | |
5680 | continue; | |
5681 | ||
5682 | return -errno; | |
5683 | } | |
5684 | ||
5685 | n = read(fd, contents, sizeof(contents)); | |
5686 | if (n < 0) | |
5687 | return -errno; | |
5688 | ||
5689 | if (n != 2 || contents[1] != '\n') | |
5690 | return -EIO; | |
5691 | ||
5692 | if (contents[0] == '1') { | |
5693 | found_online = true; | |
5694 | break; | |
5695 | } else if (contents[0] == '0') | |
5696 | found_offline = true; | |
5697 | else | |
5698 | return -EIO; | |
5699 | } | |
5700 | ||
5701 | return found_online || !found_offline; | |
5702 | } | |
fabe5c0e LP |
5703 | |
5704 | static int search_and_fopen_internal(const char *path, const char *mode, char **search, FILE **_f) { | |
5705 | char **i; | |
5706 | ||
5707 | assert(path); | |
5708 | assert(mode); | |
5709 | assert(_f); | |
5710 | ||
5711 | if (!path_strv_canonicalize_uniq(search)) | |
5712 | return -ENOMEM; | |
5713 | ||
5714 | STRV_FOREACH(i, search) { | |
5715 | _cleanup_free_ char *p = NULL; | |
5716 | FILE *f; | |
5717 | ||
5718 | p = strjoin(*i, "/", path, NULL); | |
5719 | if (!p) | |
5720 | return -ENOMEM; | |
5721 | ||
5722 | f = fopen(p, mode); | |
5723 | if (f) { | |
5724 | *_f = f; | |
5725 | return 0; | |
5726 | } | |
5727 | ||
5728 | if (errno != ENOENT) | |
5729 | return -errno; | |
5730 | } | |
5731 | ||
5732 | return -ENOENT; | |
5733 | } | |
5734 | ||
5735 | int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f) { | |
5736 | _cleanup_strv_free_ char **copy = NULL; | |
5737 | ||
5738 | assert(path); | |
5739 | assert(mode); | |
5740 | assert(_f); | |
5741 | ||
5742 | if (path_is_absolute(path)) { | |
5743 | FILE *f; | |
5744 | ||
5745 | f = fopen(path, mode); | |
5746 | if (f) { | |
5747 | *_f = f; | |
5748 | return 0; | |
5749 | } | |
5750 | ||
5751 | return -errno; | |
5752 | } | |
5753 | ||
5754 | copy = strv_copy((char**) search); | |
5755 | if (!copy) | |
5756 | return -ENOMEM; | |
5757 | ||
5758 | return search_and_fopen_internal(path, mode, copy, _f); | |
5759 | } | |
5760 | ||
5761 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f) { | |
5762 | _cleanup_strv_free_ char **s = NULL; | |
5763 | ||
5764 | if (path_is_absolute(path)) { | |
5765 | FILE *f; | |
5766 | ||
5767 | f = fopen(path, mode); | |
5768 | if (f) { | |
5769 | *_f = f; | |
5770 | return 0; | |
5771 | } | |
5772 | ||
5773 | return -errno; | |
5774 | } | |
5775 | ||
5776 | s = strv_split_nulstr(search); | |
5777 | if (!s) | |
5778 | return -ENOMEM; | |
5779 | ||
5780 | return search_and_fopen_internal(path, mode, s, _f); | |
5781 | } | |
c17ec25e | 5782 | |
d34cd374 | 5783 | int create_tmp_dir(char template[], char** dir_name) { |
c17ec25e | 5784 | int r = 0; |
32b2634e | 5785 | char *d = NULL, *dt; |
c17ec25e MS |
5786 | |
5787 | assert(dir_name); | |
5788 | ||
5c0d398d LP |
5789 | RUN_WITH_UMASK(0077) { |
5790 | d = mkdtemp(template); | |
5791 | } | |
c17ec25e | 5792 | if (!d) { |
d34cd374 ZJS |
5793 | log_error("Can't create directory %s: %m", template); |
5794 | return -errno; | |
c17ec25e MS |
5795 | } |
5796 | ||
d34cd374 ZJS |
5797 | dt = strjoin(d, "/tmp", NULL); |
5798 | if (!dt) { | |
c17ec25e | 5799 | r = log_oom(); |
f36a783c | 5800 | goto fail3; |
c17ec25e MS |
5801 | } |
5802 | ||
5c0d398d LP |
5803 | RUN_WITH_UMASK(0000) { |
5804 | r = mkdir(dt, 0777); | |
5805 | } | |
5806 | if (r < 0) { | |
d34cd374 ZJS |
5807 | log_error("Can't create directory %s: %m", dt); |
5808 | r = -errno; | |
f36a783c | 5809 | goto fail2; |
d34cd374 ZJS |
5810 | } |
5811 | log_debug("Created temporary directory %s", dt); | |
5812 | ||
5813 | r = chmod(dt, 0777 | S_ISVTX); | |
5814 | if (r < 0) { | |
5815 | log_error("Failed to chmod %s: %m", dt); | |
5816 | r = -errno; | |
5817 | goto fail1; | |
c17ec25e | 5818 | } |
d34cd374 | 5819 | log_debug("Set sticky bit on %s", dt); |
c17ec25e | 5820 | |
d34cd374 | 5821 | *dir_name = dt; |
c17ec25e MS |
5822 | |
5823 | return 0; | |
d34cd374 ZJS |
5824 | fail1: |
5825 | rmdir(dt); | |
5826 | fail2: | |
f36a783c VP |
5827 | free(dt); |
5828 | fail3: | |
d34cd374 | 5829 | rmdir(template); |
c17ec25e MS |
5830 | return r; |
5831 | } | |
66e35261 LP |
5832 | |
5833 | char *strextend(char **x, ...) { | |
5834 | va_list ap; | |
5835 | size_t f, l; | |
5836 | char *r, *p; | |
5837 | ||
5838 | assert(x); | |
5839 | ||
5840 | l = f = *x ? strlen(*x) : 0; | |
5841 | ||
5842 | va_start(ap, x); | |
5843 | for (;;) { | |
5844 | const char *t; | |
5845 | size_t n; | |
5846 | ||
5847 | t = va_arg(ap, const char *); | |
5848 | if (!t) | |
5849 | break; | |
5850 | ||
5851 | n = strlen(t); | |
5852 | if (n > ((size_t) -1) - l) { | |
5853 | va_end(ap); | |
5854 | return NULL; | |
5855 | } | |
5856 | ||
5857 | l += n; | |
5858 | } | |
5859 | va_end(ap); | |
5860 | ||
5861 | r = realloc(*x, l+1); | |
5862 | if (!r) | |
5863 | return NULL; | |
5864 | ||
5865 | p = r + f; | |
5866 | ||
5867 | va_start(ap, x); | |
5868 | for (;;) { | |
5869 | const char *t; | |
5870 | ||
5871 | t = va_arg(ap, const char *); | |
5872 | if (!t) | |
5873 | break; | |
5874 | ||
5875 | p = stpcpy(p, t); | |
5876 | } | |
5877 | va_end(ap); | |
5878 | ||
5879 | *p = 0; | |
5880 | *x = r; | |
5881 | ||
5882 | return r + l; | |
5883 | } | |
9a17484d LP |
5884 | |
5885 | char *strrep(const char *s, unsigned n) { | |
5886 | size_t l; | |
5887 | char *r, *p; | |
5888 | unsigned i; | |
5889 | ||
5890 | assert(s); | |
5891 | ||
5892 | l = strlen(s); | |
5893 | p = r = malloc(l * n + 1); | |
5894 | if (!r) | |
5895 | return NULL; | |
5896 | ||
5897 | for (i = 0; i < n; i++) | |
5898 | p = stpcpy(p, s); | |
5899 | ||
5900 | *p = 0; | |
5901 | return r; | |
5902 | } | |
392d5b37 LP |
5903 | |
5904 | void* greedy_realloc(void **p, size_t *allocated, size_t need) { | |
5905 | size_t a; | |
5906 | void *q; | |
5907 | ||
5908 | if (*allocated >= need) | |
5909 | return *p; | |
5910 | ||
9607d947 | 5911 | a = MAX(64u, need * 2); |
392d5b37 LP |
5912 | q = realloc(*p, a); |
5913 | if (!q) | |
5914 | return NULL; | |
5915 | ||
5916 | *p = q; | |
5917 | *allocated = a; | |
5918 | return q; | |
5919 | } | |
aa96c6cb LP |
5920 | |
5921 | bool id128_is_valid(const char *s) { | |
5922 | size_t i, l; | |
5923 | ||
5924 | l = strlen(s); | |
5925 | if (l == 32) { | |
5926 | ||
5927 | /* Simple formatted 128bit hex string */ | |
5928 | ||
5929 | for (i = 0; i < l; i++) { | |
5930 | char c = s[i]; | |
5931 | ||
5932 | if (!(c >= '0' && c <= '9') && | |
5933 | !(c >= 'a' && c <= 'z') && | |
5934 | !(c >= 'A' && c <= 'Z')) | |
5935 | return false; | |
5936 | } | |
5937 | ||
5938 | } else if (l == 36) { | |
5939 | ||
5940 | /* Formatted UUID */ | |
5941 | ||
5942 | for (i = 0; i < l; i++) { | |
5943 | char c = s[i]; | |
5944 | ||
5945 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
5946 | if (c != '-') | |
5947 | return false; | |
5948 | } else { | |
5949 | if (!(c >= '0' && c <= '9') && | |
5950 | !(c >= 'a' && c <= 'z') && | |
5951 | !(c >= 'A' && c <= 'Z')) | |
5952 | return false; | |
5953 | } | |
5954 | } | |
5955 | ||
5956 | } else | |
5957 | return false; | |
5958 | ||
5959 | return true; | |
5960 | } | |
7085053a DW |
5961 | |
5962 | void parse_user_at_host(char *arg, char **user, char **host) { | |
5963 | assert(arg); | |
5964 | assert(user); | |
5965 | assert(host); | |
5966 | ||
5967 | *host = strchr(arg, '@'); | |
5968 | if (*host == NULL) | |
5969 | *host = arg; | |
5970 | else { | |
5971 | *host[0]++ = '\0'; | |
5972 | *user = arg; | |
5973 | } | |
5974 | } | |
d4ac85c6 LP |
5975 | |
5976 | int split_pair(const char *s, const char *sep, char **l, char **r) { | |
5977 | char *x, *a, *b; | |
5978 | ||
5979 | assert(s); | |
5980 | assert(sep); | |
5981 | assert(l); | |
5982 | assert(r); | |
5983 | ||
5984 | if (isempty(sep)) | |
5985 | return -EINVAL; | |
5986 | ||
5987 | x = strstr(s, sep); | |
5988 | if (!x) | |
5989 | return -EINVAL; | |
5990 | ||
5991 | a = strndup(s, x - s); | |
5992 | if (!a) | |
5993 | return -ENOMEM; | |
5994 | ||
5995 | b = strdup(x + strlen(sep)); | |
5996 | if (!b) { | |
5997 | free(a); | |
5998 | return -ENOMEM; | |
5999 | } | |
6000 | ||
6001 | *l = a; | |
6002 | *r = b; | |
6003 | ||
6004 | return 0; | |
6005 | } | |
295edddf | 6006 | |
74df0fca | 6007 | int shall_restore_state(void) { |
295edddf TG |
6008 | _cleanup_free_ char *line; |
6009 | char *w, *state; | |
295edddf | 6010 | size_t l; |
74df0fca | 6011 | int r; |
295edddf | 6012 | |
74df0fca LP |
6013 | r = proc_cmdline(&line); |
6014 | if (r < 0) | |
6015 | return r; | |
6016 | if (r == 0) /* Container ... */ | |
6017 | return 1; | |
295edddf | 6018 | |
74df0fca LP |
6019 | FOREACH_WORD_QUOTED(w, l, line, state) |
6020 | if (l == 23 && memcmp(w, "systemd.restore_state=0", 23)) | |
6021 | return 0; | |
6022 | ||
6023 | return 1; | |
6024 | } | |
6025 | ||
6026 | int proc_cmdline(char **ret) { | |
6027 | int r; | |
6028 | ||
6029 | if (detect_container(NULL) > 0) { | |
6030 | *ret = NULL; | |
6031 | return 0; | |
295edddf TG |
6032 | } |
6033 | ||
74df0fca LP |
6034 | r = read_one_line_file("/proc/cmdline", ret); |
6035 | if (r < 0) | |
6036 | return r; | |
295edddf | 6037 | |
74df0fca | 6038 | return 1; |
295edddf | 6039 | } |