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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
60918275 LP |
22 | #include <assert.h> |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
85261803 | 26 | #include <stdlib.h> |
034c6ed7 LP |
27 | #include <signal.h> |
28 | #include <stdio.h> | |
1dccbe19 LP |
29 | #include <syslog.h> |
30 | #include <sched.h> | |
31 | #include <sys/resource.h> | |
ef886c6a | 32 | #include <linux/sched.h> |
a9f5d454 LP |
33 | #include <sys/types.h> |
34 | #include <sys/stat.h> | |
3a0ecb08 | 35 | #include <fcntl.h> |
a0d40ac5 | 36 | #include <dirent.h> |
601f6a1e LP |
37 | #include <sys/ioctl.h> |
38 | #include <linux/vt.h> | |
39 | #include <linux/tiocl.h> | |
80876c20 LP |
40 | #include <termios.h> |
41 | #include <stdarg.h> | |
42 | #include <sys/inotify.h> | |
43 | #include <sys/poll.h> | |
3177a7fa | 44 | #include <ctype.h> |
5b6319dc | 45 | #include <sys/prctl.h> |
ef2f1067 LP |
46 | #include <sys/utsname.h> |
47 | #include <pwd.h> | |
4fd5948e | 48 | #include <netinet/ip.h> |
3fe5e5d4 | 49 | #include <linux/kd.h> |
afea26ad | 50 | #include <dlfcn.h> |
2e78aa99 | 51 | #include <sys/wait.h> |
7948c4df | 52 | #include <sys/time.h> |
8092a428 | 53 | #include <glob.h> |
4b67834e | 54 | #include <grp.h> |
87d2c1ff | 55 | #include <sys/mman.h> |
825c6fe5 LP |
56 | #include <sys/vfs.h> |
57 | #include <linux/magic.h> | |
0b507b17 | 58 | #include <limits.h> |
09017585 MS |
59 | #include <langinfo.h> |
60 | #include <locale.h> | |
844ec79b | 61 | #include <libgen.h> |
60918275 LP |
62 | |
63 | #include "macro.h" | |
64 | #include "util.h" | |
1dccbe19 LP |
65 | #include "ioprio.h" |
66 | #include "missing.h" | |
a9f5d454 | 67 | #include "log.h" |
65d2ebdc | 68 | #include "strv.h" |
e51bc1a2 | 69 | #include "label.h" |
9eb977db | 70 | #include "path-util.h" |
d06dacd0 | 71 | #include "exit-status.h" |
83cc030f | 72 | #include "hashmap.h" |
4d1a6904 | 73 | #include "env-util.h" |
a5c32cff | 74 | #include "fileio.h" |
8f6ce71f | 75 | #include "device-nodes.h" |
f405e86d SL |
76 | #include "utf8.h" |
77 | #include "gunicode.h" | |
295edddf | 78 | #include "virt.h" |
477def80 | 79 | #include "def.h" |
56cf987f | 80 | |
9a0e6896 LP |
81 | int saved_argc = 0; |
82 | char **saved_argv = NULL; | |
9086e840 | 83 | |
28917d7d | 84 | static volatile unsigned cached_columns = 0; |
ed757c0c | 85 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 86 | |
37f85e66 | 87 | size_t page_size(void) { |
88 | static __thread size_t pgsz = 0; | |
89 | long r; | |
90 | ||
87d2c1ff | 91 | if (_likely_(pgsz > 0)) |
37f85e66 | 92 | return pgsz; |
93 | ||
e67f47e5 LP |
94 | r = sysconf(_SC_PAGESIZE); |
95 | assert(r > 0); | |
37f85e66 | 96 | |
97 | pgsz = (size_t) r; | |
37f85e66 | 98 | return pgsz; |
99 | } | |
100 | ||
e05797fb LP |
101 | bool streq_ptr(const char *a, const char *b) { |
102 | ||
103 | /* Like streq(), but tries to make sense of NULL pointers */ | |
104 | ||
105 | if (a && b) | |
106 | return streq(a, b); | |
107 | ||
108 | if (!a && !b) | |
109 | return true; | |
110 | ||
111 | return false; | |
112 | } | |
113 | ||
8c7c140f | 114 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
115 | size_t sl, pl; |
116 | ||
117 | assert(s); | |
118 | assert(postfix); | |
119 | ||
120 | sl = strlen(s); | |
121 | pl = strlen(postfix); | |
122 | ||
d4d0d4db | 123 | if (pl == 0) |
8c7c140f | 124 | return (char*) s + sl; |
d4d0d4db | 125 | |
60918275 | 126 | if (sl < pl) |
8c7c140f LP |
127 | return NULL; |
128 | ||
129 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
130 | return NULL; | |
60918275 | 131 | |
8c7c140f | 132 | return (char*) s + sl - pl; |
60918275 LP |
133 | } |
134 | ||
79d6d816 LP |
135 | bool first_word(const char *s, const char *word) { |
136 | size_t sl, wl; | |
137 | ||
138 | assert(s); | |
139 | assert(word); | |
140 | ||
141 | sl = strlen(s); | |
142 | wl = strlen(word); | |
143 | ||
144 | if (sl < wl) | |
145 | return false; | |
146 | ||
d4d0d4db LP |
147 | if (wl == 0) |
148 | return true; | |
149 | ||
79d6d816 LP |
150 | if (memcmp(s, word, wl) != 0) |
151 | return false; | |
152 | ||
d4d0d4db LP |
153 | return s[wl] == 0 || |
154 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
155 | } |
156 | ||
42f4e3c4 | 157 | int close_nointr(int fd) { |
b0ee8068 | 158 | int r; |
60918275 | 159 | |
b0ee8068 CW |
160 | assert(fd >= 0); |
161 | r = close(fd); | |
162 | ||
163 | /* Just ignore EINTR; a retry loop is the wrong | |
164 | * thing to do on Linux. | |
165 | * | |
166 | * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html | |
167 | * https://bugzilla.gnome.org/show_bug.cgi?id=682819 | |
168 | * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR | |
169 | * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain | |
170 | */ | |
171 | if (_unlikely_(r < 0 && errno == EINTR)) | |
172 | return 0; | |
173 | else if (r >= 0) | |
174 | return r; | |
175 | else | |
176 | return -errno; | |
60918275 | 177 | } |
85261803 | 178 | |
85f136b5 | 179 | void close_nointr_nofail(int fd) { |
5c0aa72a | 180 | PROTECT_ERRNO; |
85f136b5 LP |
181 | |
182 | /* like close_nointr() but cannot fail, and guarantees errno | |
183 | * is unchanged */ | |
184 | ||
185 | assert_se(close_nointr(fd) == 0); | |
186 | } | |
187 | ||
5b6319dc LP |
188 | void close_many(const int fds[], unsigned n_fd) { |
189 | unsigned i; | |
190 | ||
2c93b4ef LP |
191 | assert(fds || n_fd <= 0); |
192 | ||
5b6319dc LP |
193 | for (i = 0; i < n_fd; i++) |
194 | close_nointr_nofail(fds[i]); | |
195 | } | |
196 | ||
4b73a0c0 LP |
197 | int unlink_noerrno(const char *path) { |
198 | PROTECT_ERRNO; | |
199 | int r; | |
200 | ||
201 | r = unlink(path); | |
202 | if (r < 0) | |
203 | return -errno; | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
85261803 LP |
208 | int parse_boolean(const char *v) { |
209 | assert(v); | |
210 | ||
b43d1d01 | 211 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || strcaseeq(v, "on")) |
85261803 | 212 | return 1; |
b43d1d01 | 213 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || strcaseeq(v, "off")) |
85261803 LP |
214 | return 0; |
215 | ||
216 | return -EINVAL; | |
217 | } | |
218 | ||
3ba686c1 | 219 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 220 | unsigned long ul = 0; |
3ba686c1 LP |
221 | pid_t pid; |
222 | int r; | |
223 | ||
224 | assert(s); | |
225 | assert(ret_pid); | |
226 | ||
e67f47e5 LP |
227 | r = safe_atolu(s, &ul); |
228 | if (r < 0) | |
3ba686c1 LP |
229 | return r; |
230 | ||
231 | pid = (pid_t) ul; | |
232 | ||
233 | if ((unsigned long) pid != ul) | |
234 | return -ERANGE; | |
235 | ||
236 | if (pid <= 0) | |
237 | return -ERANGE; | |
238 | ||
239 | *ret_pid = pid; | |
240 | return 0; | |
241 | } | |
242 | ||
034a2a52 LP |
243 | int parse_uid(const char *s, uid_t* ret_uid) { |
244 | unsigned long ul = 0; | |
245 | uid_t uid; | |
246 | int r; | |
247 | ||
248 | assert(s); | |
249 | assert(ret_uid); | |
250 | ||
e67f47e5 LP |
251 | r = safe_atolu(s, &ul); |
252 | if (r < 0) | |
034a2a52 LP |
253 | return r; |
254 | ||
255 | uid = (uid_t) ul; | |
256 | ||
257 | if ((unsigned long) uid != ul) | |
258 | return -ERANGE; | |
259 | ||
260 | *ret_uid = uid; | |
261 | return 0; | |
262 | } | |
263 | ||
85261803 LP |
264 | int safe_atou(const char *s, unsigned *ret_u) { |
265 | char *x = NULL; | |
034c6ed7 | 266 | unsigned long l; |
85261803 LP |
267 | |
268 | assert(s); | |
269 | assert(ret_u); | |
270 | ||
271 | errno = 0; | |
272 | l = strtoul(s, &x, 0); | |
273 | ||
f3910003 | 274 | if (!x || x == s || *x || errno) |
48deb058 | 275 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 276 | |
034c6ed7 | 277 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
278 | return -ERANGE; |
279 | ||
280 | *ret_u = (unsigned) l; | |
281 | return 0; | |
282 | } | |
283 | ||
284 | int safe_atoi(const char *s, int *ret_i) { | |
285 | char *x = NULL; | |
034c6ed7 | 286 | long l; |
85261803 LP |
287 | |
288 | assert(s); | |
289 | assert(ret_i); | |
290 | ||
291 | errno = 0; | |
292 | l = strtol(s, &x, 0); | |
293 | ||
f3910003 | 294 | if (!x || x == s || *x || errno) |
48deb058 | 295 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 296 | |
034c6ed7 | 297 | if ((long) (int) l != l) |
85261803 LP |
298 | return -ERANGE; |
299 | ||
034c6ed7 LP |
300 | *ret_i = (int) l; |
301 | return 0; | |
302 | } | |
303 | ||
034c6ed7 LP |
304 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
305 | char *x = NULL; | |
306 | unsigned long long l; | |
307 | ||
308 | assert(s); | |
309 | assert(ret_llu); | |
310 | ||
311 | errno = 0; | |
312 | l = strtoull(s, &x, 0); | |
313 | ||
f3910003 | 314 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
315 | return errno ? -errno : -EINVAL; |
316 | ||
317 | *ret_llu = l; | |
318 | return 0; | |
319 | } | |
320 | ||
321 | int safe_atolli(const char *s, long long int *ret_lli) { | |
322 | char *x = NULL; | |
323 | long long l; | |
324 | ||
325 | assert(s); | |
326 | assert(ret_lli); | |
327 | ||
328 | errno = 0; | |
329 | l = strtoll(s, &x, 0); | |
330 | ||
f3910003 | 331 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
332 | return errno ? -errno : -EINVAL; |
333 | ||
334 | *ret_lli = l; | |
85261803 LP |
335 | return 0; |
336 | } | |
a41e8209 | 337 | |
f7900e25 TA |
338 | int safe_atod(const char *s, double *ret_d) { |
339 | char *x = NULL; | |
32b2634e | 340 | double d = 0; |
f7900e25 TA |
341 | |
342 | assert(s); | |
343 | assert(ret_d); | |
344 | ||
d6dd604b LP |
345 | RUN_WITH_LOCALE(LC_NUMERIC_MASK, "C") { |
346 | errno = 0; | |
347 | d = strtod(s, &x); | |
348 | } | |
f7900e25 TA |
349 | |
350 | if (!x || x == s || *x || errno) | |
351 | return errno ? -errno : -EINVAL; | |
352 | ||
353 | *ret_d = (double) d; | |
354 | return 0; | |
355 | } | |
356 | ||
a41e8209 | 357 | /* Split a string into words. */ |
65d2ebdc | 358 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
359 | char *current; |
360 | ||
361 | current = *state ? *state : (char*) c; | |
362 | ||
363 | if (!*current || *c == 0) | |
364 | return NULL; | |
365 | ||
65d2ebdc LP |
366 | current += strspn(current, separator); |
367 | *l = strcspn(current, separator); | |
82919e3d LP |
368 | *state = current+*l; |
369 | ||
370 | return (char*) current; | |
371 | } | |
372 | ||
034c6ed7 LP |
373 | /* Split a string into words, but consider strings enclosed in '' and |
374 | * "" as words even if they include spaces. */ | |
375 | char *split_quoted(const char *c, size_t *l, char **state) { | |
70f75a52 | 376 | const char *current, *e; |
0bab36f2 | 377 | bool escaped = false; |
034c6ed7 | 378 | |
70f75a52 LP |
379 | assert(c); |
380 | assert(l); | |
381 | assert(state); | |
034c6ed7 | 382 | |
70f75a52 | 383 | current = *state ? *state : c; |
034c6ed7 LP |
384 | |
385 | current += strspn(current, WHITESPACE); | |
386 | ||
70f75a52 LP |
387 | if (*current == 0) |
388 | return NULL; | |
389 | ||
390 | else if (*current == '\'') { | |
034c6ed7 | 391 | current ++; |
034c6ed7 | 392 | |
0bab36f2 LP |
393 | for (e = current; *e; e++) { |
394 | if (escaped) | |
395 | escaped = false; | |
396 | else if (*e == '\\') | |
397 | escaped = true; | |
398 | else if (*e == '\'') | |
399 | break; | |
400 | } | |
401 | ||
402 | *l = e-current; | |
70f75a52 LP |
403 | *state = (char*) (*e == 0 ? e : e+1); |
404 | ||
034c6ed7 LP |
405 | } else if (*current == '\"') { |
406 | current ++; | |
034c6ed7 | 407 | |
0bab36f2 LP |
408 | for (e = current; *e; e++) { |
409 | if (escaped) | |
410 | escaped = false; | |
411 | else if (*e == '\\') | |
412 | escaped = true; | |
413 | else if (*e == '\"') | |
414 | break; | |
415 | } | |
416 | ||
417 | *l = e-current; | |
70f75a52 LP |
418 | *state = (char*) (*e == 0 ? e : e+1); |
419 | ||
034c6ed7 | 420 | } else { |
0bab36f2 LP |
421 | for (e = current; *e; e++) { |
422 | if (escaped) | |
423 | escaped = false; | |
424 | else if (*e == '\\') | |
425 | escaped = true; | |
426 | else if (strchr(WHITESPACE, *e)) | |
427 | break; | |
428 | } | |
429 | *l = e-current; | |
70f75a52 | 430 | *state = (char*) e; |
034c6ed7 LP |
431 | } |
432 | ||
5b12334d | 433 | return (char*) current; |
034c6ed7 LP |
434 | } |
435 | ||
034c6ed7 LP |
436 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
437 | int r; | |
2fbe635a | 438 | _cleanup_fclose_ FILE *f = NULL; |
49aa47c7 | 439 | char line[LINE_MAX]; |
bb00e604 | 440 | long unsigned ppid; |
49aa47c7 | 441 | const char *p; |
034c6ed7 | 442 | |
49aa47c7 | 443 | assert(pid >= 0); |
034c6ed7 LP |
444 | assert(_ppid); |
445 | ||
49aa47c7 LP |
446 | if (pid == 0) { |
447 | *_ppid = getppid(); | |
448 | return 0; | |
449 | } | |
034c6ed7 | 450 | |
49aa47c7 LP |
451 | p = procfs_file_alloca(pid, "stat"); |
452 | f = fopen(p, "re"); | |
2fbe635a | 453 | if (!f) |
034c6ed7 LP |
454 | return -errno; |
455 | ||
2fbe635a | 456 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 457 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
458 | return r; |
459 | } | |
460 | ||
034c6ed7 LP |
461 | /* Let's skip the pid and comm fields. The latter is enclosed |
462 | * in () but does not escape any () in its value, so let's | |
463 | * skip over it manually */ | |
464 | ||
2fbe635a LP |
465 | p = strrchr(line, ')'); |
466 | if (!p) | |
034c6ed7 LP |
467 | return -EIO; |
468 | ||
469 | p++; | |
470 | ||
471 | if (sscanf(p, " " | |
472 | "%*c " /* state */ | |
bb00e604 | 473 | "%lu ", /* ppid */ |
034c6ed7 LP |
474 | &ppid) != 1) |
475 | return -EIO; | |
476 | ||
bb00e604 | 477 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
478 | return -ERANGE; |
479 | ||
480 | *_ppid = (pid_t) ppid; | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
7640a5de | 485 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
e67f47e5 | 486 | _cleanup_fclose_ FILE *f = NULL; |
49aa47c7 LP |
487 | char line[LINE_MAX]; |
488 | const char *p; | |
7640a5de | 489 | |
49aa47c7 | 490 | assert(pid >= 0); |
7640a5de LP |
491 | assert(st); |
492 | ||
49aa47c7 LP |
493 | if (pid == 0) |
494 | p = "/proc/self/stat"; | |
495 | else | |
496 | p = procfs_file_alloca(pid, "stat"); | |
7640a5de | 497 | |
49aa47c7 | 498 | f = fopen(p, "re"); |
e67f47e5 | 499 | if (!f) |
5b12334d | 500 | return errno == ENOENT ? -ESRCH : -errno; |
7640a5de | 501 | |
e67f47e5 LP |
502 | if (!fgets(line, sizeof(line), f)) { |
503 | if (ferror(f)) | |
504 | return -errno; | |
7640a5de | 505 | |
e67f47e5 LP |
506 | return -EIO; |
507 | } | |
7640a5de LP |
508 | |
509 | /* Let's skip the pid and comm fields. The latter is enclosed | |
510 | * in () but does not escape any () in its value, so let's | |
511 | * skip over it manually */ | |
512 | ||
e67f47e5 LP |
513 | p = strrchr(line, ')'); |
514 | if (!p) | |
7640a5de LP |
515 | return -EIO; |
516 | ||
517 | p++; | |
518 | ||
519 | if (sscanf(p, " " | |
520 | "%*c " /* state */ | |
521 | "%*d " /* ppid */ | |
522 | "%*d " /* pgrp */ | |
523 | "%*d " /* session */ | |
524 | "%*d " /* tty_nr */ | |
525 | "%*d " /* tpgid */ | |
526 | "%*u " /* flags */ | |
527 | "%*u " /* minflt */ | |
528 | "%*u " /* cminflt */ | |
529 | "%*u " /* majflt */ | |
530 | "%*u " /* cmajflt */ | |
531 | "%*u " /* utime */ | |
532 | "%*u " /* stime */ | |
533 | "%*d " /* cutime */ | |
534 | "%*d " /* cstime */ | |
535 | "%*d " /* priority */ | |
536 | "%*d " /* nice */ | |
537 | "%*d " /* num_threads */ | |
538 | "%*d " /* itrealvalue */ | |
539 | "%llu " /* starttime */, | |
540 | st) != 1) | |
541 | return -EIO; | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
34ca941c LP |
546 | int fchmod_umask(int fd, mode_t m) { |
547 | mode_t u; | |
548 | int r; | |
549 | ||
550 | u = umask(0777); | |
551 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
552 | umask(u); | |
553 | ||
554 | return r; | |
555 | } | |
556 | ||
7072ced8 LP |
557 | char *truncate_nl(char *s) { |
558 | assert(s); | |
559 | ||
560 | s[strcspn(s, NEWLINE)] = 0; | |
561 | return s; | |
562 | } | |
563 | ||
87d2c1ff | 564 | int get_process_comm(pid_t pid, char **name) { |
49aa47c7 | 565 | const char *p; |
5b12334d | 566 | int r; |
7072ced8 | 567 | |
7072ced8 | 568 | assert(name); |
49aa47c7 | 569 | assert(pid >= 0); |
7072ced8 | 570 | |
87d2c1ff | 571 | if (pid == 0) |
49aa47c7 LP |
572 | p = "/proc/self/comm"; |
573 | else | |
574 | p = procfs_file_alloca(pid, "comm"); | |
7072ced8 | 575 | |
5b12334d LP |
576 | r = read_one_line_file(p, name); |
577 | if (r == -ENOENT) | |
578 | return -ESRCH; | |
579 | ||
580 | return r; | |
7072ced8 LP |
581 | } |
582 | ||
87d2c1ff | 583 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
49aa47c7 | 584 | _cleanup_fclose_ FILE *f = NULL; |
9bdbc2e2 | 585 | char *r = NULL, *k; |
49aa47c7 | 586 | const char *p; |
c59760ee | 587 | int c; |
c59760ee | 588 | |
c59760ee | 589 | assert(line); |
49aa47c7 | 590 | assert(pid >= 0); |
c59760ee | 591 | |
87d2c1ff | 592 | if (pid == 0) |
49aa47c7 LP |
593 | p = "/proc/self/cmdline"; |
594 | else | |
595 | p = procfs_file_alloca(pid, "cmdline"); | |
c59760ee | 596 | |
49aa47c7 | 597 | f = fopen(p, "re"); |
c59760ee LP |
598 | if (!f) |
599 | return -errno; | |
49aa47c7 | 600 | |
9bdbc2e2 | 601 | if (max_length == 0) { |
49aa47c7 LP |
602 | size_t len = 0, allocated = 0; |
603 | ||
9bdbc2e2 | 604 | while ((c = getc(f)) != EOF) { |
49aa47c7 LP |
605 | |
606 | if (!GREEDY_REALLOC(r, allocated, len+2)) { | |
9bdbc2e2 | 607 | free(r); |
9bdbc2e2 LN |
608 | return -ENOMEM; |
609 | } | |
49aa47c7 LP |
610 | |
611 | r[len++] = isprint(c) ? c : ' '; | |
9bdbc2e2 | 612 | } |
49aa47c7 LP |
613 | |
614 | if (len > 0) | |
615 | r[len-1] = 0; | |
616 | ||
9bdbc2e2 LN |
617 | } else { |
618 | bool space = false; | |
619 | size_t left; | |
49aa47c7 | 620 | |
9bdbc2e2 | 621 | r = new(char, max_length); |
49aa47c7 | 622 | if (!r) |
9bdbc2e2 | 623 | return -ENOMEM; |
c59760ee | 624 | |
9bdbc2e2 LN |
625 | k = r; |
626 | left = max_length; | |
627 | while ((c = getc(f)) != EOF) { | |
c59760ee | 628 | |
9bdbc2e2 LN |
629 | if (isprint(c)) { |
630 | if (space) { | |
631 | if (left <= 4) | |
632 | break; | |
633 | ||
634 | *(k++) = ' '; | |
635 | left--; | |
636 | space = false; | |
637 | } | |
c59760ee | 638 | |
c59760ee LP |
639 | if (left <= 4) |
640 | break; | |
641 | ||
9bdbc2e2 | 642 | *(k++) = (char) c; |
057fbb58 | 643 | left--; |
9bdbc2e2 LN |
644 | } else |
645 | space = true; | |
646 | } | |
c59760ee | 647 | |
9bdbc2e2 LN |
648 | if (left <= 4) { |
649 | size_t n = MIN(left-1, 3U); | |
650 | memcpy(k, "...", n); | |
651 | k[n] = 0; | |
652 | } else | |
653 | *k = 0; | |
c59760ee LP |
654 | } |
655 | ||
35d2e7ec | 656 | /* Kernel threads have no argv[] */ |
9bdbc2e2 | 657 | if (r == NULL || r[0] == 0) { |
b47d419c | 658 | _cleanup_free_ char *t = NULL; |
35d2e7ec LP |
659 | int h; |
660 | ||
661 | free(r); | |
662 | ||
87d2c1ff LP |
663 | if (!comm_fallback) |
664 | return -ENOENT; | |
665 | ||
666 | h = get_process_comm(pid, &t); | |
667 | if (h < 0) | |
35d2e7ec LP |
668 | return h; |
669 | ||
b7def684 | 670 | r = strjoin("[", t, "]", NULL); |
87d2c1ff | 671 | if (!r) |
35d2e7ec LP |
672 | return -ENOMEM; |
673 | } | |
fa776d8e | 674 | |
c59760ee LP |
675 | *line = r; |
676 | return 0; | |
677 | } | |
678 | ||
1e5678d0 | 679 | int is_kernel_thread(pid_t pid) { |
49aa47c7 | 680 | const char *p; |
1e5678d0 LP |
681 | size_t count; |
682 | char c; | |
683 | bool eof; | |
684 | FILE *f; | |
685 | ||
686 | if (pid == 0) | |
687 | return 0; | |
688 | ||
49aa47c7 | 689 | assert(pid > 0); |
1e5678d0 | 690 | |
49aa47c7 LP |
691 | p = procfs_file_alloca(pid, "cmdline"); |
692 | f = fopen(p, "re"); | |
1e5678d0 LP |
693 | if (!f) |
694 | return -errno; | |
695 | ||
696 | count = fread(&c, 1, 1, f); | |
697 | eof = feof(f); | |
698 | fclose(f); | |
699 | ||
700 | /* Kernel threads have an empty cmdline */ | |
701 | ||
702 | if (count <= 0) | |
703 | return eof ? 1 : -errno; | |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
3a832116 SL |
708 | int get_process_capeff(pid_t pid, char **capeff) { |
709 | const char *p; | |
3a832116 SL |
710 | |
711 | assert(capeff); | |
712 | assert(pid >= 0); | |
713 | ||
714 | if (pid == 0) | |
715 | p = "/proc/self/status"; | |
716 | else | |
717 | p = procfs_file_alloca(pid, "status"); | |
718 | ||
69ab8088 | 719 | return get_status_field(p, "\nCapEff:", capeff); |
3a832116 | 720 | } |
49aa47c7 | 721 | |
87d2c1ff | 722 | int get_process_exe(pid_t pid, char **name) { |
49aa47c7 | 723 | const char *p; |
e79f68d1 ZJS |
724 | char *d; |
725 | int r; | |
87d2c1ff | 726 | |
49aa47c7 | 727 | assert(pid >= 0); |
87d2c1ff LP |
728 | assert(name); |
729 | ||
730 | if (pid == 0) | |
49aa47c7 LP |
731 | p = "/proc/self/exe"; |
732 | else | |
733 | p = procfs_file_alloca(pid, "exe"); | |
87d2c1ff | 734 | |
e79f68d1 ZJS |
735 | r = readlink_malloc(p, name); |
736 | if (r < 0) | |
5b12334d | 737 | return r == -ENOENT ? -ESRCH : r; |
e79f68d1 ZJS |
738 | |
739 | d = endswith(*name, " (deleted)"); | |
740 | if (d) | |
741 | *d = '\0'; | |
742 | ||
743 | return 0; | |
87d2c1ff LP |
744 | } |
745 | ||
901c3d0d | 746 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
f74e605f | 747 | _cleanup_fclose_ FILE *f = NULL; |
9db11a99 | 748 | char line[LINE_MAX]; |
49aa47c7 | 749 | const char *p; |
7e4ab3c5 | 750 | |
f74e605f | 751 | assert(field); |
7e4ab3c5 LP |
752 | assert(uid); |
753 | ||
754 | if (pid == 0) | |
755 | return getuid(); | |
756 | ||
49aa47c7 LP |
757 | p = procfs_file_alloca(pid, "status"); |
758 | f = fopen(p, "re"); | |
7e4ab3c5 LP |
759 | if (!f) |
760 | return -errno; | |
761 | ||
9db11a99 | 762 | FOREACH_LINE(line, f, return -errno) { |
f74e605f | 763 | char *l; |
7e4ab3c5 LP |
764 | |
765 | l = strstrip(line); | |
766 | ||
901c3d0d LP |
767 | if (startswith(l, field)) { |
768 | l += strlen(field); | |
7e4ab3c5 LP |
769 | l += strspn(l, WHITESPACE); |
770 | ||
771 | l[strcspn(l, WHITESPACE)] = 0; | |
772 | ||
f74e605f | 773 | return parse_uid(l, uid); |
7e4ab3c5 LP |
774 | } |
775 | } | |
776 | ||
f74e605f | 777 | return -EIO; |
7e4ab3c5 LP |
778 | } |
779 | ||
901c3d0d LP |
780 | int get_process_uid(pid_t pid, uid_t *uid) { |
781 | return get_process_id(pid, "Uid:", uid); | |
782 | } | |
783 | ||
784 | int get_process_gid(pid_t pid, gid_t *gid) { | |
49aa47c7 | 785 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); |
901c3d0d LP |
786 | return get_process_id(pid, "Gid:", gid); |
787 | } | |
788 | ||
fab56fc5 LP |
789 | char *strnappend(const char *s, const char *suffix, size_t b) { |
790 | size_t a; | |
44d8db9e LP |
791 | char *r; |
792 | ||
fab56fc5 LP |
793 | if (!s && !suffix) |
794 | return strdup(""); | |
795 | ||
796 | if (!s) | |
797 | return strndup(suffix, b); | |
798 | ||
799 | if (!suffix) | |
800 | return strdup(s); | |
801 | ||
44d8db9e LP |
802 | assert(s); |
803 | assert(suffix); | |
804 | ||
805 | a = strlen(s); | |
aa408e77 | 806 | if (b > ((size_t) -1) - a) |
040f18ea | 807 | return NULL; |
44d8db9e | 808 | |
040f18ea LP |
809 | r = new(char, a+b+1); |
810 | if (!r) | |
44d8db9e LP |
811 | return NULL; |
812 | ||
813 | memcpy(r, s, a); | |
814 | memcpy(r+a, suffix, b); | |
815 | r[a+b] = 0; | |
816 | ||
817 | return r; | |
818 | } | |
87f0e418 | 819 | |
fab56fc5 LP |
820 | char *strappend(const char *s, const char *suffix) { |
821 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
822 | } | |
823 | ||
87f0e418 LP |
824 | int readlink_malloc(const char *p, char **r) { |
825 | size_t l = 100; | |
826 | ||
827 | assert(p); | |
828 | assert(r); | |
829 | ||
830 | for (;;) { | |
831 | char *c; | |
832 | ssize_t n; | |
833 | ||
834 | if (!(c = new(char, l))) | |
835 | return -ENOMEM; | |
836 | ||
837 | if ((n = readlink(p, c, l-1)) < 0) { | |
838 | int ret = -errno; | |
839 | free(c); | |
840 | return ret; | |
841 | } | |
842 | ||
843 | if ((size_t) n < l-1) { | |
844 | c[n] = 0; | |
845 | *r = c; | |
846 | return 0; | |
847 | } | |
848 | ||
849 | free(c); | |
850 | l *= 2; | |
851 | } | |
852 | } | |
853 | ||
2c7108c4 | 854 | int readlink_and_make_absolute(const char *p, char **r) { |
1058cbf2 ZJS |
855 | _cleanup_free_ char *target = NULL; |
856 | char *k; | |
2c7108c4 LP |
857 | int j; |
858 | ||
859 | assert(p); | |
860 | assert(r); | |
861 | ||
1058cbf2 ZJS |
862 | j = readlink_malloc(p, &target); |
863 | if (j < 0) | |
2c7108c4 LP |
864 | return j; |
865 | ||
866 | k = file_in_same_dir(p, target); | |
2c7108c4 LP |
867 | if (!k) |
868 | return -ENOMEM; | |
869 | ||
870 | *r = k; | |
871 | return 0; | |
872 | } | |
873 | ||
83096483 LP |
874 | int readlink_and_canonicalize(const char *p, char **r) { |
875 | char *t, *s; | |
876 | int j; | |
877 | ||
878 | assert(p); | |
879 | assert(r); | |
880 | ||
881 | j = readlink_and_make_absolute(p, &t); | |
882 | if (j < 0) | |
883 | return j; | |
884 | ||
885 | s = canonicalize_file_name(t); | |
886 | if (s) { | |
887 | free(t); | |
888 | *r = s; | |
889 | } else | |
890 | *r = t; | |
891 | ||
892 | path_kill_slashes(*r); | |
893 | ||
894 | return 0; | |
895 | } | |
896 | ||
2a987ee8 LP |
897 | int reset_all_signal_handlers(void) { |
898 | int sig; | |
899 | ||
900 | for (sig = 1; sig < _NSIG; sig++) { | |
b92bea5d ZJS |
901 | struct sigaction sa = { |
902 | .sa_handler = SIG_DFL, | |
903 | .sa_flags = SA_RESTART, | |
904 | }; | |
2a987ee8 LP |
905 | |
906 | if (sig == SIGKILL || sig == SIGSTOP) | |
907 | continue; | |
908 | ||
2a987ee8 LP |
909 | /* On Linux the first two RT signals are reserved by |
910 | * glibc, and sigaction() will return EINVAL for them. */ | |
911 | if ((sigaction(sig, &sa, NULL) < 0)) | |
912 | if (errno != EINVAL) | |
913 | return -errno; | |
914 | } | |
915 | ||
8e274523 | 916 | return 0; |
2a987ee8 | 917 | } |
4a72ff34 LP |
918 | |
919 | char *strstrip(char *s) { | |
57a8eca8 | 920 | char *e; |
4a72ff34 LP |
921 | |
922 | /* Drops trailing whitespace. Modifies the string in | |
923 | * place. Returns pointer to first non-space character */ | |
924 | ||
925 | s += strspn(s, WHITESPACE); | |
926 | ||
57a8eca8 LP |
927 | for (e = strchr(s, 0); e > s; e --) |
928 | if (!strchr(WHITESPACE, e[-1])) | |
929 | break; | |
4a72ff34 | 930 | |
57a8eca8 | 931 | *e = 0; |
4a72ff34 LP |
932 | |
933 | return s; | |
4a72ff34 LP |
934 | } |
935 | ||
ee9b5e01 LP |
936 | char *delete_chars(char *s, const char *bad) { |
937 | char *f, *t; | |
938 | ||
939 | /* Drops all whitespace, regardless where in the string */ | |
940 | ||
941 | for (f = s, t = s; *f; f++) { | |
942 | if (strchr(bad, *f)) | |
943 | continue; | |
944 | ||
945 | *(t++) = *f; | |
946 | } | |
947 | ||
948 | *t = 0; | |
949 | ||
950 | return s; | |
951 | } | |
952 | ||
ab1f0633 LP |
953 | bool in_charset(const char *s, const char* charset) { |
954 | const char *i; | |
955 | ||
956 | assert(s); | |
957 | assert(charset); | |
958 | ||
959 | for (i = s; *i; i++) | |
960 | if (!strchr(charset, *i)) | |
961 | return false; | |
962 | ||
963 | return true; | |
964 | } | |
965 | ||
4a72ff34 LP |
966 | char *file_in_same_dir(const char *path, const char *filename) { |
967 | char *e, *r; | |
968 | size_t k; | |
969 | ||
970 | assert(path); | |
971 | assert(filename); | |
972 | ||
973 | /* This removes the last component of path and appends | |
974 | * filename, unless the latter is absolute anyway or the | |
975 | * former isn't */ | |
976 | ||
977 | if (path_is_absolute(filename)) | |
978 | return strdup(filename); | |
979 | ||
980 | if (!(e = strrchr(path, '/'))) | |
981 | return strdup(filename); | |
982 | ||
983 | k = strlen(filename); | |
984 | if (!(r = new(char, e-path+1+k+1))) | |
985 | return NULL; | |
986 | ||
987 | memcpy(r, path, e-path+1); | |
988 | memcpy(r+(e-path)+1, filename, k+1); | |
989 | ||
990 | return r; | |
991 | } | |
fb624d04 | 992 | |
c32dd69b LP |
993 | int rmdir_parents(const char *path, const char *stop) { |
994 | size_t l; | |
995 | int r = 0; | |
996 | ||
997 | assert(path); | |
998 | assert(stop); | |
999 | ||
1000 | l = strlen(path); | |
1001 | ||
1002 | /* Skip trailing slashes */ | |
1003 | while (l > 0 && path[l-1] == '/') | |
1004 | l--; | |
1005 | ||
1006 | while (l > 0) { | |
1007 | char *t; | |
1008 | ||
1009 | /* Skip last component */ | |
1010 | while (l > 0 && path[l-1] != '/') | |
1011 | l--; | |
1012 | ||
1013 | /* Skip trailing slashes */ | |
1014 | while (l > 0 && path[l-1] == '/') | |
1015 | l--; | |
1016 | ||
1017 | if (l <= 0) | |
1018 | break; | |
1019 | ||
1020 | if (!(t = strndup(path, l))) | |
1021 | return -ENOMEM; | |
1022 | ||
1023 | if (path_startswith(stop, t)) { | |
1024 | free(t); | |
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | r = rmdir(t); | |
1029 | free(t); | |
1030 | ||
1031 | if (r < 0) | |
1032 | if (errno != ENOENT) | |
1033 | return -errno; | |
1034 | } | |
1035 | ||
1036 | return 0; | |
1037 | } | |
1038 | ||
fb624d04 LP |
1039 | char hexchar(int x) { |
1040 | static const char table[16] = "0123456789abcdef"; | |
1041 | ||
1042 | return table[x & 15]; | |
1043 | } | |
4fe88d28 LP |
1044 | |
1045 | int unhexchar(char c) { | |
1046 | ||
1047 | if (c >= '0' && c <= '9') | |
1048 | return c - '0'; | |
1049 | ||
1050 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1051 | return c - 'a' + 10; |
4fe88d28 LP |
1052 | |
1053 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1054 | return c - 'A' + 10; |
4fe88d28 LP |
1055 | |
1056 | return -1; | |
1057 | } | |
1058 | ||
66e35261 LP |
1059 | char *hexmem(const void *p, size_t l) { |
1060 | char *r, *z; | |
1061 | const uint8_t *x; | |
1062 | ||
1063 | z = r = malloc(l * 2 + 1); | |
1064 | if (!r) | |
1065 | return NULL; | |
1066 | ||
1067 | for (x = p; x < (const uint8_t*) p + l; x++) { | |
1068 | *(z++) = hexchar(*x >> 4); | |
1069 | *(z++) = hexchar(*x & 15); | |
1070 | } | |
1071 | ||
1072 | *z = 0; | |
1073 | return r; | |
1074 | } | |
1075 | ||
2181a7f5 LP |
1076 | void *unhexmem(const char *p, size_t l) { |
1077 | uint8_t *r, *z; | |
1078 | const char *x; | |
1079 | ||
1080 | assert(p); | |
1081 | ||
1082 | z = r = malloc((l + 1) / 2 + 1); | |
1083 | if (!r) | |
1084 | return NULL; | |
1085 | ||
1086 | for (x = p; x < p + l; x += 2) { | |
1087 | int a, b; | |
1088 | ||
1089 | a = unhexchar(x[0]); | |
1090 | if (x+1 < p + l) | |
1091 | b = unhexchar(x[1]); | |
1092 | else | |
1093 | b = 0; | |
1094 | ||
1095 | *(z++) = (uint8_t) a << 4 | (uint8_t) b; | |
1096 | } | |
1097 | ||
1098 | *z = 0; | |
1099 | return r; | |
1100 | } | |
1101 | ||
4fe88d28 LP |
1102 | char octchar(int x) { |
1103 | return '0' + (x & 7); | |
1104 | } | |
1105 | ||
1106 | int unoctchar(char c) { | |
1107 | ||
1108 | if (c >= '0' && c <= '7') | |
1109 | return c - '0'; | |
1110 | ||
1111 | return -1; | |
1112 | } | |
1113 | ||
5af98f82 LP |
1114 | char decchar(int x) { |
1115 | return '0' + (x % 10); | |
1116 | } | |
1117 | ||
1118 | int undecchar(char c) { | |
1119 | ||
1120 | if (c >= '0' && c <= '9') | |
1121 | return c - '0'; | |
1122 | ||
1123 | return -1; | |
1124 | } | |
1125 | ||
4fe88d28 LP |
1126 | char *cescape(const char *s) { |
1127 | char *r, *t; | |
1128 | const char *f; | |
1129 | ||
1130 | assert(s); | |
1131 | ||
1132 | /* Does C style string escaping. */ | |
1133 | ||
f8e2fb7b LP |
1134 | r = new(char, strlen(s)*4 + 1); |
1135 | if (!r) | |
4fe88d28 LP |
1136 | return NULL; |
1137 | ||
1138 | for (f = s, t = r; *f; f++) | |
1139 | ||
1140 | switch (*f) { | |
1141 | ||
1142 | case '\a': | |
1143 | *(t++) = '\\'; | |
1144 | *(t++) = 'a'; | |
1145 | break; | |
1146 | case '\b': | |
1147 | *(t++) = '\\'; | |
1148 | *(t++) = 'b'; | |
1149 | break; | |
1150 | case '\f': | |
1151 | *(t++) = '\\'; | |
1152 | *(t++) = 'f'; | |
1153 | break; | |
1154 | case '\n': | |
1155 | *(t++) = '\\'; | |
1156 | *(t++) = 'n'; | |
1157 | break; | |
1158 | case '\r': | |
1159 | *(t++) = '\\'; | |
1160 | *(t++) = 'r'; | |
1161 | break; | |
1162 | case '\t': | |
1163 | *(t++) = '\\'; | |
1164 | *(t++) = 't'; | |
1165 | break; | |
1166 | case '\v': | |
1167 | *(t++) = '\\'; | |
1168 | *(t++) = 'v'; | |
1169 | break; | |
1170 | case '\\': | |
1171 | *(t++) = '\\'; | |
1172 | *(t++) = '\\'; | |
1173 | break; | |
1174 | case '"': | |
1175 | *(t++) = '\\'; | |
1176 | *(t++) = '"'; | |
1177 | break; | |
1178 | case '\'': | |
1179 | *(t++) = '\\'; | |
1180 | *(t++) = '\''; | |
1181 | break; | |
1182 | ||
1183 | default: | |
1184 | /* For special chars we prefer octal over | |
1185 | * hexadecimal encoding, simply because glib's | |
1186 | * g_strescape() does the same */ | |
1187 | if ((*f < ' ') || (*f >= 127)) { | |
1188 | *(t++) = '\\'; | |
1189 | *(t++) = octchar((unsigned char) *f >> 6); | |
1190 | *(t++) = octchar((unsigned char) *f >> 3); | |
1191 | *(t++) = octchar((unsigned char) *f); | |
1192 | } else | |
1193 | *(t++) = *f; | |
1194 | break; | |
1195 | } | |
1196 | ||
1197 | *t = 0; | |
1198 | ||
1199 | return r; | |
1200 | } | |
1201 | ||
5b4c61cd | 1202 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1203 | char *r, *t; |
1204 | const char *f; | |
5b4c61cd | 1205 | size_t pl; |
4fe88d28 LP |
1206 | |
1207 | assert(s); | |
1208 | ||
5b4c61cd LP |
1209 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1210 | ||
1211 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1212 | |
5b4c61cd | 1213 | r = new(char, pl+length+1); |
7f110ff9 | 1214 | if (!r) |
4fe88d28 LP |
1215 | return r; |
1216 | ||
5b4c61cd LP |
1217 | if (prefix) |
1218 | memcpy(r, prefix, pl); | |
1219 | ||
1220 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1221 | |
1222 | if (*f != '\\') { | |
1223 | *(t++) = *f; | |
1224 | continue; | |
1225 | } | |
1226 | ||
1227 | f++; | |
1228 | ||
1229 | switch (*f) { | |
1230 | ||
1231 | case 'a': | |
1232 | *(t++) = '\a'; | |
1233 | break; | |
1234 | case 'b': | |
1235 | *(t++) = '\b'; | |
1236 | break; | |
1237 | case 'f': | |
1238 | *(t++) = '\f'; | |
1239 | break; | |
1240 | case 'n': | |
1241 | *(t++) = '\n'; | |
1242 | break; | |
1243 | case 'r': | |
1244 | *(t++) = '\r'; | |
1245 | break; | |
1246 | case 't': | |
1247 | *(t++) = '\t'; | |
1248 | break; | |
1249 | case 'v': | |
1250 | *(t++) = '\v'; | |
1251 | break; | |
1252 | case '\\': | |
1253 | *(t++) = '\\'; | |
1254 | break; | |
1255 | case '"': | |
1256 | *(t++) = '"'; | |
1257 | break; | |
1258 | case '\'': | |
1259 | *(t++) = '\''; | |
1260 | break; | |
1261 | ||
e167fb86 LP |
1262 | case 's': |
1263 | /* This is an extension of the XDG syntax files */ | |
1264 | *(t++) = ' '; | |
1265 | break; | |
1266 | ||
4fe88d28 LP |
1267 | case 'x': { |
1268 | /* hexadecimal encoding */ | |
1269 | int a, b; | |
1270 | ||
7f110ff9 LP |
1271 | a = unhexchar(f[1]); |
1272 | b = unhexchar(f[2]); | |
1273 | ||
1274 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1275 | /* Invalid escape code, let's take it literal then */ |
1276 | *(t++) = '\\'; | |
1277 | *(t++) = 'x'; | |
1278 | } else { | |
1279 | *(t++) = (char) ((a << 4) | b); | |
1280 | f += 2; | |
1281 | } | |
1282 | ||
1283 | break; | |
1284 | } | |
1285 | ||
1286 | case '0': | |
1287 | case '1': | |
1288 | case '2': | |
1289 | case '3': | |
1290 | case '4': | |
1291 | case '5': | |
1292 | case '6': | |
1293 | case '7': { | |
1294 | /* octal encoding */ | |
1295 | int a, b, c; | |
1296 | ||
7f110ff9 LP |
1297 | a = unoctchar(f[0]); |
1298 | b = unoctchar(f[1]); | |
1299 | c = unoctchar(f[2]); | |
1300 | ||
1301 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1302 | /* Invalid escape code, let's take it literal then */ |
1303 | *(t++) = '\\'; | |
1304 | *(t++) = f[0]; | |
1305 | } else { | |
1306 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1307 | f += 2; | |
1308 | } | |
1309 | ||
1310 | break; | |
1311 | } | |
1312 | ||
1313 | case 0: | |
1314 | /* premature end of string.*/ | |
1315 | *(t++) = '\\'; | |
1316 | goto finish; | |
1317 | ||
1318 | default: | |
1319 | /* Invalid escape code, let's take it literal then */ | |
1320 | *(t++) = '\\'; | |
f3d4cc01 | 1321 | *(t++) = *f; |
4fe88d28 LP |
1322 | break; |
1323 | } | |
1324 | } | |
1325 | ||
1326 | finish: | |
1327 | *t = 0; | |
1328 | return r; | |
1329 | } | |
1330 | ||
5b4c61cd LP |
1331 | char *cunescape_length(const char *s, size_t length) { |
1332 | return cunescape_length_with_prefix(s, length, NULL); | |
1333 | } | |
1334 | ||
6febfd0d | 1335 | char *cunescape(const char *s) { |
5b4c61cd LP |
1336 | assert(s); |
1337 | ||
6febfd0d LP |
1338 | return cunescape_length(s, strlen(s)); |
1339 | } | |
4fe88d28 LP |
1340 | |
1341 | char *xescape(const char *s, const char *bad) { | |
1342 | char *r, *t; | |
1343 | const char *f; | |
1344 | ||
1345 | /* Escapes all chars in bad, in addition to \ and all special | |
1346 | * chars, in \xFF style escaping. May be reversed with | |
1347 | * cunescape. */ | |
1348 | ||
08ace05b LP |
1349 | r = new(char, strlen(s) * 4 + 1); |
1350 | if (!r) | |
4fe88d28 LP |
1351 | return NULL; |
1352 | ||
1353 | for (f = s, t = r; *f; f++) { | |
1354 | ||
b866264a LP |
1355 | if ((*f < ' ') || (*f >= 127) || |
1356 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1357 | *(t++) = '\\'; |
1358 | *(t++) = 'x'; | |
1359 | *(t++) = hexchar(*f >> 4); | |
1360 | *(t++) = hexchar(*f); | |
1361 | } else | |
1362 | *(t++) = *f; | |
1363 | } | |
1364 | ||
1365 | *t = 0; | |
1366 | ||
1367 | return r; | |
1368 | } | |
1369 | ||
67d51650 | 1370 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1371 | char *p; |
1372 | ||
67d51650 | 1373 | assert(t); |
4fe88d28 | 1374 | |
67d51650 | 1375 | for (p = t; *p; p++) |
4fe88d28 LP |
1376 | if (*p >= 'A' && *p <= 'Z') |
1377 | *p = *p - 'A' + 'a'; | |
1378 | ||
67d51650 | 1379 | return t; |
4fe88d28 | 1380 | } |
1dccbe19 | 1381 | |
44a6b1b6 | 1382 | _pure_ static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1383 | assert(filename); |
1384 | ||
1385 | return | |
1386 | filename[0] == '.' || | |
6c78be3c | 1387 | streq(filename, "lost+found") || |
e472d476 LP |
1388 | streq(filename, "aquota.user") || |
1389 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1390 | endswith(filename, ".rpmnew") || |
1391 | endswith(filename, ".rpmsave") || | |
1392 | endswith(filename, ".rpmorig") || | |
1393 | endswith(filename, ".dpkg-old") || | |
1394 | endswith(filename, ".dpkg-new") || | |
1395 | endswith(filename, ".swp"); | |
1396 | } | |
1397 | ||
a228a22f LP |
1398 | bool ignore_file(const char *filename) { |
1399 | assert(filename); | |
1400 | ||
1401 | if (endswith(filename, "~")) | |
1402 | return false; | |
1403 | ||
1404 | return ignore_file_allow_backup(filename); | |
1405 | } | |
1406 | ||
3a0ecb08 LP |
1407 | int fd_nonblock(int fd, bool nonblock) { |
1408 | int flags; | |
1409 | ||
1410 | assert(fd >= 0); | |
1411 | ||
1412 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1413 | return -errno; | |
1414 | ||
1415 | if (nonblock) | |
1416 | flags |= O_NONBLOCK; | |
1417 | else | |
1418 | flags &= ~O_NONBLOCK; | |
1419 | ||
1420 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1421 | return -errno; | |
1422 | ||
1423 | return 0; | |
1424 | } | |
1425 | ||
1426 | int fd_cloexec(int fd, bool cloexec) { | |
1427 | int flags; | |
1428 | ||
1429 | assert(fd >= 0); | |
1430 | ||
1431 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1432 | return -errno; | |
1433 | ||
1434 | if (cloexec) | |
1435 | flags |= FD_CLOEXEC; | |
1436 | else | |
1437 | flags &= ~FD_CLOEXEC; | |
1438 | ||
1439 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1440 | return -errno; | |
1441 | ||
1442 | return 0; | |
1443 | } | |
1444 | ||
44a6b1b6 | 1445 | _pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
b19be9eb LP |
1446 | unsigned i; |
1447 | ||
1448 | assert(n_fdset == 0 || fdset); | |
1449 | ||
1450 | for (i = 0; i < n_fdset; i++) | |
1451 | if (fdset[i] == fd) | |
1452 | return true; | |
1453 | ||
1454 | return false; | |
1455 | } | |
1456 | ||
a0d40ac5 LP |
1457 | int close_all_fds(const int except[], unsigned n_except) { |
1458 | DIR *d; | |
1459 | struct dirent *de; | |
1460 | int r = 0; | |
1461 | ||
b19be9eb LP |
1462 | assert(n_except == 0 || except); |
1463 | ||
1464 | d = opendir("/proc/self/fd"); | |
1465 | if (!d) { | |
1466 | int fd; | |
1467 | struct rlimit rl; | |
1468 | ||
1469 | /* When /proc isn't available (for example in chroots) | |
1470 | * the fallback is brute forcing through the fd | |
1471 | * table */ | |
1472 | ||
1473 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1474 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1475 | ||
1476 | if (fd_in_set(fd, except, n_except)) | |
1477 | continue; | |
1478 | ||
1479 | if (close_nointr(fd) < 0) | |
1480 | if (errno != EBADF && r == 0) | |
1481 | r = -errno; | |
1482 | } | |
1483 | ||
1484 | return r; | |
1485 | } | |
a0d40ac5 LP |
1486 | |
1487 | while ((de = readdir(d))) { | |
a7610064 | 1488 | int fd = -1; |
a0d40ac5 | 1489 | |
a16e1123 | 1490 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1491 | continue; |
1492 | ||
720ce21d LP |
1493 | if (safe_atoi(de->d_name, &fd) < 0) |
1494 | /* Let's better ignore this, just in case */ | |
1495 | continue; | |
a0d40ac5 LP |
1496 | |
1497 | if (fd < 3) | |
1498 | continue; | |
1499 | ||
1500 | if (fd == dirfd(d)) | |
1501 | continue; | |
1502 | ||
b19be9eb LP |
1503 | if (fd_in_set(fd, except, n_except)) |
1504 | continue; | |
a0d40ac5 | 1505 | |
720ce21d | 1506 | if (close_nointr(fd) < 0) { |
2f357920 | 1507 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1508 | if (errno != EBADF && r == 0) |
1509 | r = -errno; | |
2f357920 | 1510 | } |
a0d40ac5 LP |
1511 | } |
1512 | ||
a0d40ac5 LP |
1513 | closedir(d); |
1514 | return r; | |
1515 | } | |
1516 | ||
db12775d LP |
1517 | bool chars_intersect(const char *a, const char *b) { |
1518 | const char *p; | |
1519 | ||
1520 | /* Returns true if any of the chars in a are in b. */ | |
1521 | for (p = a; *p; p++) | |
1522 | if (strchr(b, *p)) | |
1523 | return true; | |
1524 | ||
1525 | return false; | |
1526 | } | |
1527 | ||
42856c10 | 1528 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
1529 | static const char table[] = |
1530 | "cifs\0" | |
1531 | "smbfs\0" | |
1532 | "ncpfs\0" | |
dac70dc7 | 1533 | "ncp\0" |
a05f97b3 LP |
1534 | "nfs\0" |
1535 | "nfs4\0" | |
1536 | "gfs\0" | |
73836c5c | 1537 | "gfs2\0"; |
42856c10 | 1538 | |
a05f97b3 | 1539 | return nulstr_contains(table, fstype); |
42856c10 LP |
1540 | } |
1541 | ||
601f6a1e | 1542 | int chvt(int vt) { |
a05f97b3 | 1543 | _cleanup_close_ int fd; |
601f6a1e | 1544 | |
a05f97b3 LP |
1545 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1546 | if (fd < 0) | |
601f6a1e LP |
1547 | return -errno; |
1548 | ||
1549 | if (vt < 0) { | |
1550 | int tiocl[2] = { | |
1551 | TIOCL_GETKMSGREDIRECT, | |
1552 | 0 | |
1553 | }; | |
1554 | ||
a05f97b3 LP |
1555 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1556 | return -errno; | |
601f6a1e LP |
1557 | |
1558 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1559 | } | |
1560 | ||
1561 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1562 | return -errno; |
601f6a1e | 1563 | |
a05f97b3 | 1564 | return 0; |
601f6a1e LP |
1565 | } |
1566 | ||
8f2d43a0 | 1567 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
1568 | struct termios old_termios, new_termios; |
1569 | char c; | |
20c03b7b | 1570 | char line[LINE_MAX]; |
80876c20 LP |
1571 | |
1572 | assert(f); | |
1573 | assert(ret); | |
1574 | ||
1575 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1576 | new_termios = old_termios; | |
1577 | ||
1578 | new_termios.c_lflag &= ~ICANON; | |
1579 | new_termios.c_cc[VMIN] = 1; | |
1580 | new_termios.c_cc[VTIME] = 0; | |
1581 | ||
1582 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1583 | size_t k; | |
1584 | ||
8f2d43a0 LP |
1585 | if (t != (usec_t) -1) { |
1586 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
1587 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1588 | return -ETIMEDOUT; | |
1589 | } | |
1590 | } | |
1591 | ||
80876c20 LP |
1592 | k = fread(&c, 1, 1, f); |
1593 | ||
1594 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1595 | ||
1596 | if (k <= 0) | |
1597 | return -EIO; | |
1598 | ||
1599 | if (need_nl) | |
1600 | *need_nl = c != '\n'; | |
1601 | ||
1602 | *ret = c; | |
1603 | return 0; | |
1604 | } | |
1605 | } | |
1606 | ||
8f2d43a0 LP |
1607 | if (t != (usec_t) -1) |
1608 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
1609 | return -ETIMEDOUT; | |
1610 | ||
1611 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
1612 | return -EIO; |
1613 | ||
1614 | truncate_nl(line); | |
1615 | ||
1616 | if (strlen(line) != 1) | |
1617 | return -EBADMSG; | |
1618 | ||
1619 | if (need_nl) | |
1620 | *need_nl = false; | |
1621 | ||
1622 | *ret = line[0]; | |
1623 | return 0; | |
1624 | } | |
1625 | ||
1626 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 | 1627 | |
80876c20 LP |
1628 | assert(ret); |
1629 | assert(replies); | |
1630 | assert(text); | |
1631 | ||
1632 | for (;;) { | |
1633 | va_list ap; | |
1634 | char c; | |
1635 | int r; | |
1636 | bool need_nl = true; | |
1637 | ||
8481248b | 1638 | if (on_tty()) |
c1072ea0 | 1639 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1640 | |
80876c20 LP |
1641 | va_start(ap, text); |
1642 | vprintf(text, ap); | |
1643 | va_end(ap); | |
1644 | ||
8481248b | 1645 | if (on_tty()) |
c1072ea0 | 1646 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1647 | |
80876c20 LP |
1648 | fflush(stdout); |
1649 | ||
8f2d43a0 LP |
1650 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
1651 | if (r < 0) { | |
80876c20 LP |
1652 | |
1653 | if (r == -EBADMSG) { | |
1654 | puts("Bad input, please try again."); | |
1655 | continue; | |
1656 | } | |
1657 | ||
1658 | putchar('\n'); | |
1659 | return r; | |
1660 | } | |
1661 | ||
1662 | if (need_nl) | |
1663 | putchar('\n'); | |
1664 | ||
1665 | if (strchr(replies, c)) { | |
1666 | *ret = c; | |
1667 | return 0; | |
1668 | } | |
1669 | ||
1670 | puts("Read unexpected character, please try again."); | |
1671 | } | |
1672 | } | |
1673 | ||
512947d4 | 1674 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
1675 | struct termios termios; |
1676 | int r = 0; | |
3fe5e5d4 LP |
1677 | |
1678 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
1679 | |
1680 | assert(fd >= 0); | |
1681 | ||
eed1d0e3 LP |
1682 | /* We leave locked terminal attributes untouched, so that |
1683 | * Plymouth may set whatever it wants to set, and we don't | |
1684 | * interfere with that. */ | |
3fe5e5d4 LP |
1685 | |
1686 | /* Disable exclusive mode, just in case */ | |
1687 | ioctl(fd, TIOCNXCL); | |
1688 | ||
5c0100a5 | 1689 | /* Switch to text mode */ |
512947d4 MS |
1690 | if (switch_to_text) |
1691 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 1692 | |
3fe5e5d4 | 1693 | /* Enable console unicode mode */ |
df465b3f | 1694 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
1695 | |
1696 | if (tcgetattr(fd, &termios) < 0) { | |
1697 | r = -errno; | |
1698 | goto finish; | |
1699 | } | |
1700 | ||
aaf694ca LP |
1701 | /* We only reset the stuff that matters to the software. How |
1702 | * hardware is set up we don't touch assuming that somebody | |
1703 | * else will do that for us */ | |
1704 | ||
1705 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
1706 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
1707 | termios.c_oflag |= ONLCR; | |
1708 | termios.c_cflag |= CREAD; | |
1709 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
1710 | ||
1711 | termios.c_cc[VINTR] = 03; /* ^C */ | |
1712 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
1713 | termios.c_cc[VERASE] = 0177; | |
1714 | termios.c_cc[VKILL] = 025; /* ^X */ | |
1715 | termios.c_cc[VEOF] = 04; /* ^D */ | |
1716 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
1717 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
1718 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
1719 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
1720 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
1721 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
1722 | termios.c_cc[VEOL] = 0; |
1723 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
1724 | |
1725 | termios.c_cc[VTIME] = 0; | |
1726 | termios.c_cc[VMIN] = 1; | |
1727 | ||
1728 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
1729 | r = -errno; | |
1730 | ||
1731 | finish: | |
1732 | /* Just in case, flush all crap out */ | |
1733 | tcflush(fd, TCIOFLUSH); | |
1734 | ||
1735 | return r; | |
1736 | } | |
1737 | ||
6ea832a2 LP |
1738 | int reset_terminal(const char *name) { |
1739 | int fd, r; | |
1740 | ||
1741 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
1742 | if (fd < 0) | |
1743 | return fd; | |
1744 | ||
512947d4 | 1745 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
1746 | close_nointr_nofail(fd); |
1747 | ||
1748 | return r; | |
1749 | } | |
1750 | ||
80876c20 LP |
1751 | int open_terminal(const char *name, int mode) { |
1752 | int fd, r; | |
f73f76ac | 1753 | unsigned c = 0; |
80876c20 | 1754 | |
f73f76ac LP |
1755 | /* |
1756 | * If a TTY is in the process of being closed opening it might | |
1757 | * cause EIO. This is horribly awful, but unlikely to be | |
1758 | * changed in the kernel. Hence we work around this problem by | |
1759 | * retrying a couple of times. | |
1760 | * | |
1761 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
1762 | */ | |
1763 | ||
dd94c17e LP |
1764 | assert(!(mode & O_CREAT)); |
1765 | ||
f73f76ac | 1766 | for (;;) { |
dd94c17e | 1767 | fd = open(name, mode, 0); |
af6da548 | 1768 | if (fd >= 0) |
f73f76ac LP |
1769 | break; |
1770 | ||
1771 | if (errno != EIO) | |
1772 | return -errno; | |
1773 | ||
af6da548 | 1774 | /* Max 1s in total */ |
f73f76ac LP |
1775 | if (c >= 20) |
1776 | return -errno; | |
1777 | ||
1778 | usleep(50 * USEC_PER_MSEC); | |
1779 | c++; | |
1780 | } | |
1781 | ||
1782 | if (fd < 0) | |
80876c20 LP |
1783 | return -errno; |
1784 | ||
af6da548 LP |
1785 | r = isatty(fd); |
1786 | if (r < 0) { | |
80876c20 LP |
1787 | close_nointr_nofail(fd); |
1788 | return -errno; | |
1789 | } | |
1790 | ||
1791 | if (!r) { | |
1792 | close_nointr_nofail(fd); | |
1793 | return -ENOTTY; | |
1794 | } | |
1795 | ||
1796 | return fd; | |
1797 | } | |
1798 | ||
1799 | int flush_fd(int fd) { | |
b92bea5d ZJS |
1800 | struct pollfd pollfd = { |
1801 | .fd = fd, | |
1802 | .events = POLLIN, | |
1803 | }; | |
80876c20 LP |
1804 | |
1805 | for (;;) { | |
20c03b7b | 1806 | char buf[LINE_MAX]; |
80876c20 LP |
1807 | ssize_t l; |
1808 | int r; | |
1809 | ||
e62d8c39 ZJS |
1810 | r = poll(&pollfd, 1, 0); |
1811 | if (r < 0) { | |
80876c20 LP |
1812 | if (errno == EINTR) |
1813 | continue; | |
1814 | ||
1815 | return -errno; | |
80876c20 | 1816 | |
e62d8c39 | 1817 | } else if (r == 0) |
80876c20 LP |
1818 | return 0; |
1819 | ||
e62d8c39 ZJS |
1820 | l = read(fd, buf, sizeof(buf)); |
1821 | if (l < 0) { | |
80876c20 LP |
1822 | |
1823 | if (errno == EINTR) | |
1824 | continue; | |
1825 | ||
1826 | if (errno == EAGAIN) | |
1827 | return 0; | |
1828 | ||
1829 | return -errno; | |
e62d8c39 | 1830 | } else if (l == 0) |
80876c20 LP |
1831 | return 0; |
1832 | } | |
1833 | } | |
1834 | ||
af6da548 LP |
1835 | int acquire_terminal( |
1836 | const char *name, | |
1837 | bool fail, | |
1838 | bool force, | |
1839 | bool ignore_tiocstty_eperm, | |
1840 | usec_t timeout) { | |
1841 | ||
4a0ff478 | 1842 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 1843 | usec_t ts = 0; |
80876c20 LP |
1844 | |
1845 | assert(name); | |
1846 | ||
1847 | /* We use inotify to be notified when the tty is closed. We | |
1848 | * create the watch before checking if we can actually acquire | |
1849 | * it, so that we don't lose any event. | |
1850 | * | |
1851 | * Note: strictly speaking this actually watches for the | |
1852 | * device being closed, it does *not* really watch whether a | |
1853 | * tty loses its controlling process. However, unless some | |
1854 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
1855 | * its tty otherwise this will not become a problem. As long | |
1856 | * as the administrator makes sure not configure any service | |
1857 | * on the same tty as an untrusted user this should not be a | |
1858 | * problem. (Which he probably should not do anyway.) */ | |
1859 | ||
af6da548 LP |
1860 | if (timeout != (usec_t) -1) |
1861 | ts = now(CLOCK_MONOTONIC); | |
1862 | ||
80876c20 | 1863 | if (!fail && !force) { |
af6da548 LP |
1864 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
1865 | if (notify < 0) { | |
80876c20 LP |
1866 | r = -errno; |
1867 | goto fail; | |
1868 | } | |
1869 | ||
af6da548 LP |
1870 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
1871 | if (wd < 0) { | |
80876c20 LP |
1872 | r = -errno; |
1873 | goto fail; | |
1874 | } | |
1875 | } | |
1876 | ||
1877 | for (;;) { | |
b92bea5d ZJS |
1878 | struct sigaction sa_old, sa_new = { |
1879 | .sa_handler = SIG_IGN, | |
1880 | .sa_flags = SA_RESTART, | |
1881 | }; | |
1882 | ||
af6da548 LP |
1883 | if (notify >= 0) { |
1884 | r = flush_fd(notify); | |
1885 | if (r < 0) | |
e3d1855b | 1886 | goto fail; |
af6da548 | 1887 | } |
80876c20 LP |
1888 | |
1889 | /* We pass here O_NOCTTY only so that we can check the return | |
1890 | * value TIOCSCTTY and have a reliable way to figure out if we | |
1891 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
1892 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
1893 | if (fd < 0) | |
6ea832a2 | 1894 | return fd; |
80876c20 | 1895 | |
32c4bef8 LP |
1896 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1897 | * if we already own the tty. */ | |
32c4bef8 LP |
1898 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
1899 | ||
80876c20 | 1900 | /* First, try to get the tty */ |
32c4bef8 LP |
1901 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
1902 | r = -errno; | |
1903 | ||
1904 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
1905 | |
1906 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
1907 | * returning EPERM, i.e. when very likely we already | |
1908 | * are have this controlling terminal. */ | |
32c4bef8 | 1909 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
1910 | r = 0; |
1911 | ||
32c4bef8 | 1912 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
1913 | goto fail; |
1914 | } | |
1915 | ||
1916 | if (r >= 0) | |
1917 | break; | |
1918 | ||
1919 | assert(!fail); | |
1920 | assert(!force); | |
1921 | assert(notify >= 0); | |
1922 | ||
1923 | for (;;) { | |
f601daa7 | 1924 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 1925 | ssize_t l; |
f601daa7 | 1926 | struct inotify_event *e; |
80876c20 | 1927 | |
af6da548 LP |
1928 | if (timeout != (usec_t) -1) { |
1929 | usec_t n; | |
1930 | ||
1931 | n = now(CLOCK_MONOTONIC); | |
1932 | if (ts + timeout < n) { | |
1933 | r = -ETIMEDOUT; | |
1934 | goto fail; | |
1935 | } | |
1936 | ||
1937 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
1938 | if (r < 0) | |
1939 | goto fail; | |
1940 | ||
1941 | if (r == 0) { | |
1942 | r = -ETIMEDOUT; | |
1943 | goto fail; | |
1944 | } | |
1945 | } | |
1946 | ||
1947 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
1948 | if (l < 0) { | |
80876c20 | 1949 | |
af6da548 | 1950 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
1951 | continue; |
1952 | ||
1953 | r = -errno; | |
1954 | goto fail; | |
1955 | } | |
1956 | ||
1957 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 1958 | |
f601daa7 LP |
1959 | while (l > 0) { |
1960 | size_t step; | |
80876c20 | 1961 | |
f601daa7 | 1962 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 1963 | r = -EIO; |
f601daa7 LP |
1964 | goto fail; |
1965 | } | |
80876c20 | 1966 | |
f601daa7 LP |
1967 | step = sizeof(struct inotify_event) + e->len; |
1968 | assert(step <= (size_t) l); | |
80876c20 | 1969 | |
f601daa7 LP |
1970 | e = (struct inotify_event*) ((uint8_t*) e + step); |
1971 | l -= step; | |
80876c20 LP |
1972 | } |
1973 | ||
1974 | break; | |
1975 | } | |
1976 | ||
1977 | /* We close the tty fd here since if the old session | |
1978 | * ended our handle will be dead. It's important that | |
1979 | * we do this after sleeping, so that we don't enter | |
1980 | * an endless loop. */ | |
1981 | close_nointr_nofail(fd); | |
1982 | } | |
1983 | ||
1984 | if (notify >= 0) | |
a16e1123 | 1985 | close_nointr_nofail(notify); |
80876c20 | 1986 | |
512947d4 MS |
1987 | r = reset_terminal_fd(fd, true); |
1988 | if (r < 0) | |
80876c20 LP |
1989 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
1990 | ||
1991 | return fd; | |
1992 | ||
1993 | fail: | |
1994 | if (fd >= 0) | |
a16e1123 | 1995 | close_nointr_nofail(fd); |
80876c20 LP |
1996 | |
1997 | if (notify >= 0) | |
a16e1123 | 1998 | close_nointr_nofail(notify); |
80876c20 LP |
1999 | |
2000 | return r; | |
2001 | } | |
2002 | ||
2003 | int release_terminal(void) { | |
e62d8c39 | 2004 | int r = 0; |
b92bea5d ZJS |
2005 | struct sigaction sa_old, sa_new = { |
2006 | .sa_handler = SIG_IGN, | |
2007 | .sa_flags = SA_RESTART, | |
2008 | }; | |
7fd1b19b | 2009 | _cleanup_close_ int fd; |
80876c20 | 2010 | |
e62d8c39 ZJS |
2011 | fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC); |
2012 | if (fd < 0) | |
80876c20 LP |
2013 | return -errno; |
2014 | ||
57cd2192 LP |
2015 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2016 | * by our own TIOCNOTTY */ | |
57cd2192 LP |
2017 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
2018 | ||
80876c20 LP |
2019 | if (ioctl(fd, TIOCNOTTY) < 0) |
2020 | r = -errno; | |
2021 | ||
57cd2192 LP |
2022 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2023 | ||
80876c20 LP |
2024 | return r; |
2025 | } | |
2026 | ||
9a34ec5f LP |
2027 | int sigaction_many(const struct sigaction *sa, ...) { |
2028 | va_list ap; | |
2029 | int r = 0, sig; | |
2030 | ||
2031 | va_start(ap, sa); | |
2032 | while ((sig = va_arg(ap, int)) > 0) | |
2033 | if (sigaction(sig, sa, NULL) < 0) | |
2034 | r = -errno; | |
2035 | va_end(ap); | |
2036 | ||
2037 | return r; | |
2038 | } | |
2039 | ||
2040 | int ignore_signals(int sig, ...) { | |
b92bea5d ZJS |
2041 | struct sigaction sa = { |
2042 | .sa_handler = SIG_IGN, | |
2043 | .sa_flags = SA_RESTART, | |
2044 | }; | |
9a34ec5f LP |
2045 | va_list ap; |
2046 | int r = 0; | |
a337c6fc | 2047 | |
a337c6fc | 2048 | |
9a34ec5f LP |
2049 | if (sigaction(sig, &sa, NULL) < 0) |
2050 | r = -errno; | |
2051 | ||
2052 | va_start(ap, sig); | |
2053 | while ((sig = va_arg(ap, int)) > 0) | |
2054 | if (sigaction(sig, &sa, NULL) < 0) | |
2055 | r = -errno; | |
2056 | va_end(ap); | |
2057 | ||
2058 | return r; | |
2059 | } | |
2060 | ||
2061 | int default_signals(int sig, ...) { | |
b92bea5d ZJS |
2062 | struct sigaction sa = { |
2063 | .sa_handler = SIG_DFL, | |
2064 | .sa_flags = SA_RESTART, | |
2065 | }; | |
9a34ec5f LP |
2066 | va_list ap; |
2067 | int r = 0; | |
2068 | ||
9a34ec5f LP |
2069 | if (sigaction(sig, &sa, NULL) < 0) |
2070 | r = -errno; | |
2071 | ||
2072 | va_start(ap, sig); | |
2073 | while ((sig = va_arg(ap, int)) > 0) | |
2074 | if (sigaction(sig, &sa, NULL) < 0) | |
2075 | r = -errno; | |
2076 | va_end(ap); | |
2077 | ||
2078 | return r; | |
a337c6fc LP |
2079 | } |
2080 | ||
8d567588 LP |
2081 | int close_pipe(int p[]) { |
2082 | int a = 0, b = 0; | |
2083 | ||
2084 | assert(p); | |
2085 | ||
2086 | if (p[0] >= 0) { | |
2087 | a = close_nointr(p[0]); | |
2088 | p[0] = -1; | |
2089 | } | |
2090 | ||
2091 | if (p[1] >= 0) { | |
2092 | b = close_nointr(p[1]); | |
2093 | p[1] = -1; | |
2094 | } | |
2095 | ||
2096 | return a < 0 ? a : b; | |
2097 | } | |
2098 | ||
eb22ac37 | 2099 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2100 | uint8_t *p; |
2101 | ssize_t n = 0; | |
2102 | ||
2103 | assert(fd >= 0); | |
2104 | assert(buf); | |
2105 | ||
2106 | p = buf; | |
2107 | ||
2108 | while (nbytes > 0) { | |
2109 | ssize_t k; | |
2110 | ||
2111 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2112 | ||
eb22ac37 | 2113 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2114 | continue; |
2115 | ||
eb22ac37 | 2116 | if (k < 0 && errno == EAGAIN && do_poll) { |
b92bea5d ZJS |
2117 | struct pollfd pollfd = { |
2118 | .fd = fd, | |
2119 | .events = POLLIN, | |
2120 | }; | |
8d567588 LP |
2121 | |
2122 | if (poll(&pollfd, 1, -1) < 0) { | |
2123 | if (errno == EINTR) | |
2124 | continue; | |
2125 | ||
2126 | return n > 0 ? n : -errno; | |
2127 | } | |
2128 | ||
c22ceead CJ |
2129 | /* We knowingly ignore the revents value here, |
2130 | * and expect that any error/EOF is reported | |
2131 | * via read()/write() | |
2132 | */ | |
8d567588 LP |
2133 | |
2134 | continue; | |
2135 | } | |
2136 | ||
2137 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2138 | } | |
2139 | ||
2140 | p += k; | |
2141 | nbytes -= k; | |
2142 | n += k; | |
2143 | } | |
2144 | ||
2145 | return n; | |
2146 | } | |
2147 | ||
eb22ac37 LP |
2148 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2149 | const uint8_t *p; | |
2150 | ssize_t n = 0; | |
2151 | ||
2152 | assert(fd >= 0); | |
2153 | assert(buf); | |
2154 | ||
2155 | p = buf; | |
2156 | ||
2157 | while (nbytes > 0) { | |
2158 | ssize_t k; | |
2159 | ||
fe652127 LP |
2160 | k = write(fd, p, nbytes); |
2161 | if (k <= 0) { | |
eb22ac37 LP |
2162 | |
2163 | if (k < 0 && errno == EINTR) | |
2164 | continue; | |
2165 | ||
2166 | if (k < 0 && errno == EAGAIN && do_poll) { | |
b92bea5d ZJS |
2167 | struct pollfd pollfd = { |
2168 | .fd = fd, | |
2169 | .events = POLLOUT, | |
2170 | }; | |
eb22ac37 LP |
2171 | |
2172 | if (poll(&pollfd, 1, -1) < 0) { | |
2173 | if (errno == EINTR) | |
2174 | continue; | |
2175 | ||
2176 | return n > 0 ? n : -errno; | |
2177 | } | |
2178 | ||
c22ceead CJ |
2179 | /* We knowingly ignore the revents value here, |
2180 | * and expect that any error/EOF is reported | |
2181 | * via read()/write() | |
2182 | */ | |
eb22ac37 LP |
2183 | |
2184 | continue; | |
2185 | } | |
2186 | ||
2187 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2188 | } | |
2189 | ||
2190 | p += k; | |
2191 | nbytes -= k; | |
2192 | n += k; | |
2193 | } | |
2194 | ||
2195 | return n; | |
2196 | } | |
2197 | ||
ab1f0633 LP |
2198 | int parse_bytes(const char *t, off_t *bytes) { |
2199 | static const struct { | |
2200 | const char *suffix; | |
b32ff512 | 2201 | unsigned long long factor; |
ab1f0633 LP |
2202 | } table[] = { |
2203 | { "B", 1 }, | |
2204 | { "K", 1024ULL }, | |
2205 | { "M", 1024ULL*1024ULL }, | |
2206 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2207 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2208 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2209 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2210 | { "", 1 }, |
2211 | }; | |
2212 | ||
2213 | const char *p; | |
b32ff512 | 2214 | unsigned long long r = 0; |
ab1f0633 LP |
2215 | |
2216 | assert(t); | |
2217 | assert(bytes); | |
2218 | ||
2219 | p = t; | |
2220 | do { | |
2221 | long long l; | |
2222 | char *e; | |
2223 | unsigned i; | |
2224 | ||
2225 | errno = 0; | |
2226 | l = strtoll(p, &e, 10); | |
2227 | ||
8333c77e | 2228 | if (errno > 0) |
ab1f0633 LP |
2229 | return -errno; |
2230 | ||
2231 | if (l < 0) | |
2232 | return -ERANGE; | |
2233 | ||
2234 | if (e == p) | |
2235 | return -EINVAL; | |
2236 | ||
2237 | e += strspn(e, WHITESPACE); | |
2238 | ||
2239 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2240 | if (startswith(e, table[i].suffix)) { | |
b32ff512 ZJS |
2241 | unsigned long long tmp; |
2242 | if ((unsigned long long) l > ULLONG_MAX / table[i].factor) | |
2243 | return -ERANGE; | |
2244 | tmp = l * table[i].factor; | |
2245 | if (tmp > ULLONG_MAX - r) | |
2246 | return -ERANGE; | |
2247 | ||
2248 | r += tmp; | |
2249 | if ((unsigned long long) (off_t) r != r) | |
2250 | return -ERANGE; | |
2251 | ||
ab1f0633 LP |
2252 | p = e + strlen(table[i].suffix); |
2253 | break; | |
2254 | } | |
2255 | ||
2256 | if (i >= ELEMENTSOF(table)) | |
2257 | return -EINVAL; | |
2258 | ||
b32ff512 | 2259 | } while (*p); |
ab1f0633 LP |
2260 | |
2261 | *bytes = r; | |
2262 | ||
2263 | return 0; | |
2264 | } | |
2265 | ||
843d2643 LP |
2266 | int make_stdio(int fd) { |
2267 | int r, s, t; | |
2268 | ||
2269 | assert(fd >= 0); | |
2270 | ||
73836c5c LP |
2271 | r = dup3(fd, STDIN_FILENO, 0); |
2272 | s = dup3(fd, STDOUT_FILENO, 0); | |
2273 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2274 | |
2275 | if (fd >= 3) | |
2276 | close_nointr_nofail(fd); | |
2277 | ||
2278 | if (r < 0 || s < 0 || t < 0) | |
2279 | return -errno; | |
2280 | ||
73836c5c | 2281 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2282 | |
843d2643 LP |
2283 | return 0; |
2284 | } | |
2285 | ||
ade509ce LP |
2286 | int make_null_stdio(void) { |
2287 | int null_fd; | |
2288 | ||
cd3bd60a LP |
2289 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2290 | if (null_fd < 0) | |
ade509ce LP |
2291 | return -errno; |
2292 | ||
2293 | return make_stdio(null_fd); | |
2294 | } | |
2295 | ||
8407a5d0 LP |
2296 | bool is_device_path(const char *path) { |
2297 | ||
2298 | /* Returns true on paths that refer to a device, either in | |
2299 | * sysfs or in /dev */ | |
2300 | ||
2301 | return | |
2302 | path_startswith(path, "/dev/") || | |
2303 | path_startswith(path, "/sys/"); | |
2304 | } | |
2305 | ||
01f78473 | 2306 | int dir_is_empty(const char *path) { |
a05f97b3 | 2307 | _cleanup_closedir_ DIR *d; |
01f78473 | 2308 | int r; |
01f78473 | 2309 | |
a05f97b3 LP |
2310 | d = opendir(path); |
2311 | if (!d) | |
01f78473 LP |
2312 | return -errno; |
2313 | ||
2314 | for (;;) { | |
7d5e9c0f LP |
2315 | struct dirent *de; |
2316 | union dirent_storage buf; | |
01f78473 | 2317 | |
7d5e9c0f | 2318 | r = readdir_r(d, &buf.de, &de); |
a05f97b3 LP |
2319 | if (r > 0) |
2320 | return -r; | |
01f78473 | 2321 | |
a05f97b3 LP |
2322 | if (!de) |
2323 | return 1; | |
01f78473 | 2324 | |
a05f97b3 LP |
2325 | if (!ignore_file(de->d_name)) |
2326 | return 0; | |
2327 | } | |
01f78473 LP |
2328 | } |
2329 | ||
844ec79b ZJS |
2330 | char* dirname_malloc(const char *path) { |
2331 | char *d, *dir, *dir2; | |
2332 | ||
2333 | d = strdup(path); | |
2334 | if (!d) | |
2335 | return NULL; | |
2336 | dir = dirname(d); | |
2337 | assert(dir); | |
2338 | ||
2339 | if (dir != d) { | |
2340 | dir2 = strdup(dir); | |
2341 | free(d); | |
2342 | return dir2; | |
2343 | } | |
2344 | ||
2345 | return dir; | |
2346 | } | |
2347 | ||
d3782d60 | 2348 | unsigned long long random_ull(void) { |
a05f97b3 | 2349 | _cleanup_close_ int fd; |
d3782d60 LP |
2350 | uint64_t ull; |
2351 | ssize_t r; | |
2352 | ||
ac0930c8 LP |
2353 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2354 | if (fd < 0) | |
d3782d60 LP |
2355 | goto fallback; |
2356 | ||
eb22ac37 | 2357 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
2358 | if (r != sizeof(ull)) |
2359 | goto fallback; | |
2360 | ||
2361 | return ull; | |
2362 | ||
2363 | fallback: | |
2364 | return random() * RAND_MAX + random(); | |
2365 | } | |
2366 | ||
a3b6fafe LP |
2367 | unsigned random_u(void) { |
2368 | _cleanup_close_ int fd; | |
2369 | unsigned u; | |
2370 | ssize_t r; | |
2371 | ||
2372 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
2373 | if (fd < 0) | |
2374 | goto fallback; | |
2375 | ||
2376 | r = loop_read(fd, &u, sizeof(u), true); | |
2377 | if (r != sizeof(u)) | |
2378 | goto fallback; | |
2379 | ||
2380 | return u; | |
2381 | ||
2382 | fallback: | |
2383 | return random() * RAND_MAX + random(); | |
2384 | } | |
2385 | ||
5b6319dc LP |
2386 | void rename_process(const char name[8]) { |
2387 | assert(name); | |
2388 | ||
5d6b1584 LP |
2389 | /* This is a like a poor man's setproctitle(). It changes the |
2390 | * comm field, argv[0], and also the glibc's internally used | |
2391 | * name of the process. For the first one a limit of 16 chars | |
2392 | * applies, to the second one usually one of 10 (i.e. length | |
2393 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2394 | * "systemd"). If you pass a longer string it will be | |
2395 | * truncated */ | |
5b6319dc | 2396 | |
5d6b1584 | 2397 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2398 | |
2399 | if (program_invocation_name) | |
2400 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2401 | |
2402 | if (saved_argc > 0) { | |
2403 | int i; | |
2404 | ||
2405 | if (saved_argv[0]) | |
2406 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2407 | ||
2408 | for (i = 1; i < saved_argc; i++) { | |
2409 | if (!saved_argv[i]) | |
2410 | break; | |
2411 | ||
2412 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
2413 | } | |
2414 | } | |
5b6319dc LP |
2415 | } |
2416 | ||
7d793605 LP |
2417 | void sigset_add_many(sigset_t *ss, ...) { |
2418 | va_list ap; | |
2419 | int sig; | |
2420 | ||
2421 | assert(ss); | |
2422 | ||
2423 | va_start(ap, ss); | |
2424 | while ((sig = va_arg(ap, int)) > 0) | |
2425 | assert_se(sigaddset(ss, sig) == 0); | |
2426 | va_end(ap); | |
2427 | } | |
2428 | ||
ef2f1067 LP |
2429 | char* gethostname_malloc(void) { |
2430 | struct utsname u; | |
2431 | ||
2432 | assert_se(uname(&u) >= 0); | |
2433 | ||
344de609 | 2434 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2435 | return strdup(u.nodename); |
2436 | ||
2437 | return strdup(u.sysname); | |
2438 | } | |
2439 | ||
344de609 LP |
2440 | bool hostname_is_set(void) { |
2441 | struct utsname u; | |
2442 | ||
2443 | assert_se(uname(&u) >= 0); | |
2444 | ||
2445 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2446 | } | |
2447 | ||
7c5f152a | 2448 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2449 | long bufsize; |
a05f97b3 LP |
2450 | char *name; |
2451 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2452 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2453 | |
2454 | /* Shortcut things to avoid NSS lookups */ | |
2455 | if (uid == 0) | |
2456 | return strdup("root"); | |
2457 | ||
7c5f152a LP |
2458 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2459 | if (bufsize <= 0) | |
ef2f1067 LP |
2460 | bufsize = 4096; |
2461 | ||
7c5f152a LP |
2462 | buf = malloc(bufsize); |
2463 | if (!buf) | |
ef2f1067 LP |
2464 | return NULL; |
2465 | ||
a05f97b3 LP |
2466 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2467 | return strdup(pw->pw_name); | |
ef2f1067 LP |
2468 | |
2469 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
2470 | return NULL; | |
2471 | ||
2472 | return name; | |
2473 | } | |
2474 | ||
7c5f152a LP |
2475 | char* getlogname_malloc(void) { |
2476 | uid_t uid; | |
2477 | struct stat st; | |
2478 | ||
2479 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2480 | uid = st.st_uid; | |
2481 | else | |
2482 | uid = getuid(); | |
2483 | ||
2484 | return lookup_uid(uid); | |
2485 | } | |
2486 | ||
2487 | char *getusername_malloc(void) { | |
2488 | const char *e; | |
2489 | ||
2490 | e = getenv("USER"); | |
2491 | if (e) | |
2492 | return strdup(e); | |
2493 | ||
2494 | return lookup_uid(getuid()); | |
2495 | } | |
2496 | ||
fc116c6a LP |
2497 | int getttyname_malloc(int fd, char **r) { |
2498 | char path[PATH_MAX], *c; | |
618e02c7 | 2499 | int k; |
8c6db833 LP |
2500 | |
2501 | assert(r); | |
ef2f1067 | 2502 | |
a05f97b3 | 2503 | k = ttyname_r(fd, path, sizeof(path)); |
27373e44 | 2504 | if (k > 0) |
618e02c7 | 2505 | return -k; |
ef2f1067 LP |
2506 | |
2507 | char_array_0(path); | |
2508 | ||
a05f97b3 LP |
2509 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2510 | if (!c) | |
8c6db833 LP |
2511 | return -ENOMEM; |
2512 | ||
2513 | *r = c; | |
2514 | return 0; | |
2515 | } | |
2516 | ||
fc116c6a LP |
2517 | int getttyname_harder(int fd, char **r) { |
2518 | int k; | |
2519 | char *s; | |
2520 | ||
a05f97b3 LP |
2521 | k = getttyname_malloc(fd, &s); |
2522 | if (k < 0) | |
fc116c6a LP |
2523 | return k; |
2524 | ||
2525 | if (streq(s, "tty")) { | |
2526 | free(s); | |
4d6d6518 | 2527 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2528 | } |
2529 | ||
2530 | *r = s; | |
2531 | return 0; | |
2532 | } | |
2533 | ||
4d6d6518 | 2534 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
49aa47c7 LP |
2535 | _cleanup_fclose_ FILE *f = NULL; |
2536 | char line[LINE_MAX], *p; | |
fc116c6a | 2537 | unsigned long ttynr; |
49aa47c7 | 2538 | const char *fn; |
fc116c6a | 2539 | |
49aa47c7 | 2540 | assert(pid >= 0); |
49aa47c7 LP |
2541 | |
2542 | if (pid == 0) | |
2543 | fn = "/proc/self/stat"; | |
2544 | else | |
2545 | fn = procfs_file_alloca(pid, "stat"); | |
4d6d6518 LP |
2546 | |
2547 | f = fopen(fn, "re"); | |
4d6d6518 | 2548 | if (!f) |
fc116c6a LP |
2549 | return -errno; |
2550 | ||
0bee65f0 LP |
2551 | if (!fgets(line, sizeof(line), f)) |
2552 | return feof(f) ? -EIO : -errno; | |
fc116c6a | 2553 | |
4d6d6518 LP |
2554 | p = strrchr(line, ')'); |
2555 | if (!p) | |
fc116c6a LP |
2556 | return -EIO; |
2557 | ||
2558 | p++; | |
2559 | ||
2560 | if (sscanf(p, " " | |
2561 | "%*c " /* state */ | |
2562 | "%*d " /* ppid */ | |
2563 | "%*d " /* pgrp */ | |
2564 | "%*d " /* session */ | |
2565 | "%lu ", /* ttynr */ | |
2566 | &ttynr) != 1) | |
2567 | return -EIO; | |
2568 | ||
11dc5d2b LP |
2569 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2570 | return -ENOENT; | |
2571 | ||
0bee65f0 LP |
2572 | if (d) |
2573 | *d = (dev_t) ttynr; | |
2574 | ||
fc116c6a LP |
2575 | return 0; |
2576 | } | |
2577 | ||
4d6d6518 | 2578 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 2579 | int k; |
fa70beaa | 2580 | char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *s, *b, *p; |
fc116c6a LP |
2581 | dev_t devnr; |
2582 | ||
2583 | assert(r); | |
2584 | ||
4d6d6518 LP |
2585 | k = get_ctty_devnr(pid, &devnr); |
2586 | if (k < 0) | |
fc116c6a LP |
2587 | return k; |
2588 | ||
2589 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
fc116c6a | 2590 | |
23406ce5 LP |
2591 | k = readlink_malloc(fn, &s); |
2592 | if (k < 0) { | |
fc116c6a LP |
2593 | |
2594 | if (k != -ENOENT) | |
2595 | return k; | |
2596 | ||
46824d0e LP |
2597 | /* This is an ugly hack */ |
2598 | if (major(devnr) == 136) { | |
2599 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
2600 | return -ENOMEM; | |
2601 | ||
2602 | *r = b; | |
2603 | if (_devnr) | |
2604 | *_devnr = devnr; | |
2605 | ||
2606 | return 0; | |
2607 | } | |
2608 | ||
fc116c6a LP |
2609 | /* Probably something like the ptys which have no |
2610 | * symlink in /dev/char. Let's return something | |
2611 | * vaguely useful. */ | |
2612 | ||
23406ce5 LP |
2613 | b = strdup(fn + 5); |
2614 | if (!b) | |
fc116c6a LP |
2615 | return -ENOMEM; |
2616 | ||
2617 | *r = b; | |
46824d0e LP |
2618 | if (_devnr) |
2619 | *_devnr = devnr; | |
2620 | ||
fc116c6a LP |
2621 | return 0; |
2622 | } | |
2623 | ||
2624 | if (startswith(s, "/dev/")) | |
2625 | p = s + 5; | |
2626 | else if (startswith(s, "../")) | |
2627 | p = s + 3; | |
2628 | else | |
2629 | p = s; | |
2630 | ||
2631 | b = strdup(p); | |
2632 | free(s); | |
2633 | ||
2634 | if (!b) | |
2635 | return -ENOMEM; | |
2636 | ||
2637 | *r = b; | |
46824d0e LP |
2638 | if (_devnr) |
2639 | *_devnr = devnr; | |
2640 | ||
fc116c6a LP |
2641 | return 0; |
2642 | } | |
2643 | ||
f56d5db9 | 2644 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
2645 | DIR *d; |
2646 | int ret = 0; | |
2647 | ||
2648 | assert(fd >= 0); | |
2649 | ||
2650 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2651 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2652 | |
d4d046e3 LP |
2653 | d = fdopendir(fd); |
2654 | if (!d) { | |
8c6db833 | 2655 | close_nointr_nofail(fd); |
4c633005 LP |
2656 | |
2657 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2658 | } |
2659 | ||
2660 | for (;;) { | |
7d5e9c0f LP |
2661 | struct dirent *de; |
2662 | union dirent_storage buf; | |
7925c22a LP |
2663 | bool is_dir, keep_around; |
2664 | struct stat st; | |
8c6db833 LP |
2665 | int r; |
2666 | ||
7d5e9c0f | 2667 | r = readdir_r(d, &buf.de, &de); |
d4d046e3 LP |
2668 | if (r != 0 && ret == 0) { |
2669 | ret = -r; | |
8c6db833 LP |
2670 | break; |
2671 | } | |
2672 | ||
2673 | if (!de) | |
2674 | break; | |
2675 | ||
2676 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
2677 | continue; | |
2678 | ||
7925c22a LP |
2679 | if (de->d_type == DT_UNKNOWN || |
2680 | honour_sticky || | |
2681 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2682 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2683 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2684 | ret = -errno; |
2685 | continue; | |
2686 | } | |
2687 | ||
2688 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2689 | keep_around = |
2690 | honour_sticky && | |
2691 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2692 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2693 | } else { |
8c6db833 | 2694 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2695 | keep_around = false; |
ad293f5a | 2696 | } |
8c6db833 LP |
2697 | |
2698 | if (is_dir) { | |
2699 | int subdir_fd; | |
8c6db833 | 2700 | |
597f43c7 | 2701 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
2702 | if (root_dev && st.st_dev != root_dev->st_dev) |
2703 | continue; | |
8c6db833 | 2704 | |
7925c22a LP |
2705 | subdir_fd = openat(fd, de->d_name, |
2706 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
2707 | if (subdir_fd < 0) { | |
2708 | if (ret == 0 && errno != ENOENT) | |
2709 | ret = -errno; | |
2710 | continue; | |
2711 | } | |
2712 | ||
b3d28469 | 2713 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
2714 | if (r < 0 && ret == 0) |
2715 | ret = r; | |
2716 | ||
2717 | if (!keep_around) | |
2718 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
2719 | if (ret == 0 && errno != ENOENT) |
2720 | ret = -errno; | |
2721 | } | |
2722 | ||
2723 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
2724 | |
2725 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 2726 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2727 | ret = -errno; |
2728 | } | |
2729 | } | |
2730 | } | |
2731 | ||
2732 | closedir(d); | |
2733 | ||
2734 | return ret; | |
2735 | } | |
2736 | ||
44a6b1b6 | 2737 | _pure_ static int is_temporary_fs(struct statfs *s) { |
943aad8c | 2738 | assert(s); |
bdd29249 | 2739 | return |
c51cf056 ZJS |
2740 | F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) || |
2741 | F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC); | |
943aad8c ZJS |
2742 | } |
2743 | ||
f56d5db9 LP |
2744 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
2745 | struct statfs s; | |
2746 | ||
2747 | assert(fd >= 0); | |
2748 | ||
2749 | if (fstatfs(fd, &s) < 0) { | |
2750 | close_nointr_nofail(fd); | |
2751 | return -errno; | |
2752 | } | |
2753 | ||
2754 | /* We refuse to clean disk file systems with this call. This | |
2755 | * is extra paranoia just to be sure we never ever remove | |
2756 | * non-state data */ | |
943aad8c | 2757 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2758 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2759 | close_nointr_nofail(fd); | |
2760 | return -EPERM; | |
2761 | } | |
2762 | ||
2763 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
2764 | } | |
2765 | ||
2766 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
2767 | int fd, r; | |
2768 | struct statfs s; | |
8c6db833 LP |
2769 | |
2770 | assert(path); | |
2771 | ||
f56d5db9 LP |
2772 | /* We refuse to clean the root file system with this |
2773 | * call. This is extra paranoia to never cause a really | |
2774 | * seriously broken system. */ | |
2775 | if (path_equal(path, "/")) { | |
2776 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
2777 | return -EPERM; | |
2778 | } | |
461b1822 | 2779 | |
d4d046e3 LP |
2780 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
2781 | if (fd < 0) { | |
8c6db833 LP |
2782 | |
2783 | if (errno != ENOTDIR) | |
2784 | return -errno; | |
2785 | ||
f56d5db9 LP |
2786 | if (!dangerous) { |
2787 | if (statfs(path, &s) < 0) | |
2788 | return -errno; | |
2789 | ||
943aad8c | 2790 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2791 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2792 | return -EPERM; | |
2793 | } | |
2794 | } | |
2795 | ||
8c6db833 | 2796 | if (delete_root && !only_dirs) |
d4d046e3 | 2797 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
2798 | return -errno; |
2799 | ||
2800 | return 0; | |
2801 | } | |
2802 | ||
f56d5db9 LP |
2803 | if (!dangerous) { |
2804 | if (fstatfs(fd, &s) < 0) { | |
2805 | close_nointr_nofail(fd); | |
2806 | return -errno; | |
2807 | } | |
ad293f5a | 2808 | |
943aad8c | 2809 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2810 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2811 | close_nointr_nofail(fd); | |
2812 | return -EPERM; | |
2813 | } | |
2814 | } | |
2815 | ||
2816 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
2817 | if (delete_root) { |
2818 | ||
8d53b453 | 2819 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 2820 | return r; |
8c6db833 | 2821 | |
e27796a0 | 2822 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
2823 | if (r == 0) |
2824 | r = -errno; | |
2825 | } | |
ad293f5a | 2826 | } |
8c6db833 LP |
2827 | |
2828 | return r; | |
2829 | } | |
2830 | ||
f56d5db9 LP |
2831 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
2832 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
2833 | } | |
2834 | ||
2835 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
2836 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
2837 | } | |
2838 | ||
8c6db833 LP |
2839 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
2840 | assert(path); | |
2841 | ||
2842 | /* Under the assumption that we are running privileged we | |
2843 | * first change the access mode and only then hand out | |
2844 | * ownership to avoid a window where access is too open. */ | |
2845 | ||
8d53b453 LP |
2846 | if (mode != (mode_t) -1) |
2847 | if (chmod(path, mode) < 0) | |
2848 | return -errno; | |
8c6db833 | 2849 | |
8d53b453 LP |
2850 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2851 | if (chown(path, uid, gid) < 0) | |
2852 | return -errno; | |
8c6db833 LP |
2853 | |
2854 | return 0; | |
ef2f1067 LP |
2855 | } |
2856 | ||
f4b47811 LP |
2857 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
2858 | assert(fd >= 0); | |
2859 | ||
2860 | /* Under the assumption that we are running privileged we | |
2861 | * first change the access mode and only then hand out | |
2862 | * ownership to avoid a window where access is too open. */ | |
2863 | ||
9588bc32 LP |
2864 | if (mode != (mode_t) -1) |
2865 | if (fchmod(fd, mode) < 0) | |
2866 | return -errno; | |
f4b47811 | 2867 | |
9588bc32 LP |
2868 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2869 | if (fchown(fd, uid, gid) < 0) | |
2870 | return -errno; | |
f4b47811 LP |
2871 | |
2872 | return 0; | |
2873 | } | |
2874 | ||
82c121a4 LP |
2875 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2876 | cpu_set_t *r; | |
2877 | unsigned n = 1024; | |
2878 | ||
2879 | /* Allocates the cpuset in the right size */ | |
2880 | ||
2881 | for (;;) { | |
2882 | if (!(r = CPU_ALLOC(n))) | |
2883 | return NULL; | |
2884 | ||
2885 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2886 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2887 | ||
2888 | if (ncpus) | |
2889 | *ncpus = n; | |
2890 | ||
2891 | return r; | |
2892 | } | |
2893 | ||
2894 | CPU_FREE(r); | |
2895 | ||
2896 | if (errno != EINVAL) | |
2897 | return NULL; | |
2898 | ||
2899 | n *= 2; | |
2900 | } | |
2901 | } | |
2902 | ||
984a2be4 | 2903 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) { |
9ab7a8d2 | 2904 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
2905 | _cleanup_free_ char *s = NULL; |
2906 | _cleanup_close_ int fd = -1; | |
b92bea5d | 2907 | struct iovec iovec[6] = {}; |
81beb750 | 2908 | int n = 0; |
984a2be4 | 2909 | static bool prev_ephemeral; |
9e58ff9c LP |
2910 | |
2911 | assert(format); | |
2912 | ||
9ab7a8d2 | 2913 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
2914 | * optional and go exclusively to the console. */ |
2915 | ||
2916 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 2917 | return log_oom(); |
9e58ff9c | 2918 | |
67e5cc4f | 2919 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 2920 | if (fd < 0) |
669bec5d | 2921 | return fd; |
9e58ff9c | 2922 | |
67e5cc4f | 2923 | if (ellipse) { |
9ab7a8d2 MS |
2924 | char *e; |
2925 | size_t emax, sl; | |
2926 | int c; | |
2927 | ||
67e5cc4f LP |
2928 | c = fd_columns(fd); |
2929 | if (c <= 0) | |
2930 | c = 80; | |
81beb750 | 2931 | |
669bec5d | 2932 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
2933 | |
2934 | emax = c - sl - 1; | |
2935 | if (emax < 3) | |
2936 | emax = 3; | |
81beb750 | 2937 | |
67e5cc4f LP |
2938 | e = ellipsize(s, emax, 75); |
2939 | if (e) { | |
2940 | free(s); | |
2941 | s = e; | |
2942 | } | |
81beb750 LP |
2943 | } |
2944 | ||
984a2be4 MS |
2945 | if (prev_ephemeral) |
2946 | IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE); | |
2947 | prev_ephemeral = ephemeral; | |
2948 | ||
9ab7a8d2 MS |
2949 | if (status) { |
2950 | if (!isempty(status)) { | |
2951 | IOVEC_SET_STRING(iovec[n++], "["); | |
2952 | IOVEC_SET_STRING(iovec[n++], status); | |
2953 | IOVEC_SET_STRING(iovec[n++], "] "); | |
2954 | } else | |
2955 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
2956 | } |
2957 | ||
9ab7a8d2 | 2958 | IOVEC_SET_STRING(iovec[n++], s); |
984a2be4 MS |
2959 | if (!ephemeral) |
2960 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 2961 | |
669bec5d LP |
2962 | if (writev(fd, iovec, n) < 0) |
2963 | return -errno; | |
9e58ff9c | 2964 | |
669bec5d | 2965 | return 0; |
9e58ff9c LP |
2966 | } |
2967 | ||
984a2be4 | 2968 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) { |
c846ff47 | 2969 | va_list ap; |
669bec5d | 2970 | int r; |
c846ff47 LP |
2971 | |
2972 | assert(format); | |
2973 | ||
2974 | va_start(ap, format); | |
984a2be4 | 2975 | r = status_vprintf(status, ellipse, ephemeral, format, ap); |
c846ff47 | 2976 | va_end(ap); |
669bec5d LP |
2977 | |
2978 | return r; | |
c846ff47 LP |
2979 | } |
2980 | ||
669bec5d | 2981 | int status_welcome(void) { |
669bec5d | 2982 | _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL; |
9588bc32 | 2983 | int r; |
669bec5d LP |
2984 | |
2985 | r = parse_env_file("/etc/os-release", NEWLINE, | |
2986 | "PRETTY_NAME", &pretty_name, | |
2987 | "ANSI_COLOR", &ansi_color, | |
2988 | NULL); | |
9588bc32 | 2989 | |
669bec5d LP |
2990 | if (r < 0 && r != -ENOENT) |
2991 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
2992 | ||
f620dff8 | 2993 | return status_printf(NULL, false, false, |
669bec5d LP |
2994 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", |
2995 | isempty(ansi_color) ? "1" : ansi_color, | |
2996 | isempty(pretty_name) ? "Linux" : pretty_name); | |
c846ff47 LP |
2997 | } |
2998 | ||
fab56fc5 LP |
2999 | char *replace_env(const char *format, char **env) { |
3000 | enum { | |
3001 | WORD, | |
c24eb49e | 3002 | CURLY, |
fab56fc5 LP |
3003 | VARIABLE |
3004 | } state = WORD; | |
3005 | ||
3006 | const char *e, *word = format; | |
3007 | char *r = NULL, *k; | |
3008 | ||
3009 | assert(format); | |
3010 | ||
3011 | for (e = format; *e; e ++) { | |
3012 | ||
3013 | switch (state) { | |
3014 | ||
3015 | case WORD: | |
3016 | if (*e == '$') | |
c24eb49e | 3017 | state = CURLY; |
fab56fc5 LP |
3018 | break; |
3019 | ||
c24eb49e LP |
3020 | case CURLY: |
3021 | if (*e == '{') { | |
fab56fc5 LP |
3022 | if (!(k = strnappend(r, word, e-word-1))) |
3023 | goto fail; | |
3024 | ||
3025 | free(r); | |
3026 | r = k; | |
3027 | ||
3028 | word = e-1; | |
3029 | state = VARIABLE; | |
3030 | ||
3031 | } else if (*e == '$') { | |
3032 | if (!(k = strnappend(r, word, e-word))) | |
3033 | goto fail; | |
3034 | ||
3035 | free(r); | |
3036 | r = k; | |
3037 | ||
3038 | word = e+1; | |
3039 | state = WORD; | |
3040 | } else | |
3041 | state = WORD; | |
3042 | break; | |
3043 | ||
3044 | case VARIABLE: | |
c24eb49e | 3045 | if (*e == '}') { |
b95cf362 | 3046 | const char *t; |
fab56fc5 | 3047 | |
4d1a6904 | 3048 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 3049 | |
4d1a6904 LP |
3050 | k = strappend(r, t); |
3051 | if (!k) | |
b95cf362 | 3052 | goto fail; |
fab56fc5 | 3053 | |
b95cf362 LP |
3054 | free(r); |
3055 | r = k; | |
fab56fc5 | 3056 | |
b95cf362 | 3057 | word = e+1; |
fab56fc5 LP |
3058 | state = WORD; |
3059 | } | |
3060 | break; | |
3061 | } | |
3062 | } | |
3063 | ||
3064 | if (!(k = strnappend(r, word, e-word))) | |
3065 | goto fail; | |
3066 | ||
3067 | free(r); | |
3068 | return k; | |
3069 | ||
3070 | fail: | |
3071 | free(r); | |
3072 | return NULL; | |
3073 | } | |
3074 | ||
3075 | char **replace_env_argv(char **argv, char **env) { | |
3076 | char **r, **i; | |
c24eb49e LP |
3077 | unsigned k = 0, l = 0; |
3078 | ||
3079 | l = strv_length(argv); | |
fab56fc5 | 3080 | |
c24eb49e | 3081 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3082 | return NULL; |
3083 | ||
3084 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3085 | |
3086 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3087 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3088 | char *e; | |
3089 | char **w, **m; | |
3090 | unsigned q; | |
c24eb49e | 3091 | |
4d1a6904 LP |
3092 | e = strv_env_get(env, *i+1); |
3093 | if (e) { | |
c24eb49e LP |
3094 | |
3095 | if (!(m = strv_split_quoted(e))) { | |
3096 | r[k] = NULL; | |
3097 | strv_free(r); | |
3098 | return NULL; | |
3099 | } | |
b95cf362 LP |
3100 | } else |
3101 | m = NULL; | |
c24eb49e | 3102 | |
b95cf362 LP |
3103 | q = strv_length(m); |
3104 | l = l + q - 1; | |
c24eb49e | 3105 | |
b95cf362 LP |
3106 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3107 | r[k] = NULL; | |
3108 | strv_free(r); | |
3109 | strv_free(m); | |
3110 | return NULL; | |
3111 | } | |
c24eb49e | 3112 | |
b95cf362 LP |
3113 | r = w; |
3114 | if (m) { | |
c24eb49e LP |
3115 | memcpy(r + k, m, q * sizeof(char*)); |
3116 | free(m); | |
c24eb49e | 3117 | } |
b95cf362 LP |
3118 | |
3119 | k += q; | |
3120 | continue; | |
c24eb49e LP |
3121 | } |
3122 | ||
3123 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3124 | if (!(r[k++] = replace_env(*i, env))) { |
3125 | strv_free(r); | |
3126 | return NULL; | |
3127 | } | |
3128 | } | |
3129 | ||
3130 | r[k] = NULL; | |
3131 | return r; | |
3132 | } | |
3133 | ||
81beb750 | 3134 | int fd_columns(int fd) { |
b92bea5d | 3135 | struct winsize ws = {}; |
81beb750 LP |
3136 | |
3137 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3138 | return -errno; | |
3139 | ||
3140 | if (ws.ws_col <= 0) | |
3141 | return -EIO; | |
3142 | ||
3143 | return ws.ws_col; | |
3144 | } | |
3145 | ||
28917d7d | 3146 | unsigned columns(void) { |
fa776d8e | 3147 | const char *e; |
7009eec2 | 3148 | int c; |
fa776d8e | 3149 | |
28917d7d LP |
3150 | if (_likely_(cached_columns > 0)) |
3151 | return cached_columns; | |
11f96fac | 3152 | |
28917d7d LP |
3153 | c = 0; |
3154 | e = getenv("COLUMNS"); | |
3155 | if (e) | |
7009eec2 | 3156 | safe_atoi(e, &c); |
fa776d8e | 3157 | |
28917d7d LP |
3158 | if (c <= 0) |
3159 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3160 | |
28917d7d LP |
3161 | if (c <= 0) |
3162 | c = 80; | |
11f96fac | 3163 | |
28917d7d LP |
3164 | cached_columns = c; |
3165 | return c; | |
11f96fac ZJS |
3166 | } |
3167 | ||
8f2d43a0 | 3168 | int fd_lines(int fd) { |
b92bea5d | 3169 | struct winsize ws = {}; |
8f2d43a0 LP |
3170 | |
3171 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3172 | return -errno; | |
3173 | ||
3174 | if (ws.ws_row <= 0) | |
3175 | return -EIO; | |
3176 | ||
3177 | return ws.ws_row; | |
3178 | } | |
3179 | ||
3180 | unsigned lines(void) { | |
8f2d43a0 | 3181 | const char *e; |
ed757c0c | 3182 | unsigned l; |
8f2d43a0 | 3183 | |
ed757c0c LP |
3184 | if (_likely_(cached_lines > 0)) |
3185 | return cached_lines; | |
8f2d43a0 | 3186 | |
ed757c0c | 3187 | l = 0; |
8f2d43a0 LP |
3188 | e = getenv("LINES"); |
3189 | if (e) | |
ed757c0c | 3190 | safe_atou(e, &l); |
8f2d43a0 | 3191 | |
ed757c0c LP |
3192 | if (l <= 0) |
3193 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3194 | |
ed757c0c LP |
3195 | if (l <= 0) |
3196 | l = 24; | |
8f2d43a0 | 3197 | |
ed757c0c LP |
3198 | cached_lines = l; |
3199 | return cached_lines; | |
3200 | } | |
3201 | ||
3202 | /* intended to be used as a SIGWINCH sighandler */ | |
3203 | void columns_lines_cache_reset(int signum) { | |
3204 | cached_columns = 0; | |
3205 | cached_lines = 0; | |
3206 | } | |
3207 | ||
3208 | bool on_tty(void) { | |
3209 | static int cached_on_tty = -1; | |
3210 | ||
3211 | if (_unlikely_(cached_on_tty < 0)) | |
3212 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3213 | ||
3214 | return cached_on_tty; | |
8f2d43a0 LP |
3215 | } |
3216 | ||
b4f10a5e | 3217 | int running_in_chroot(void) { |
b92bea5d | 3218 | struct stat a = {}, b = {}; |
b4f10a5e LP |
3219 | |
3220 | /* Only works as root */ | |
b4f10a5e LP |
3221 | if (stat("/proc/1/root", &a) < 0) |
3222 | return -errno; | |
3223 | ||
3224 | if (stat("/", &b) < 0) | |
3225 | return -errno; | |
3226 | ||
3227 | return | |
3228 | a.st_dev != b.st_dev || | |
3229 | a.st_ino != b.st_ino; | |
3230 | } | |
3231 | ||
f405e86d | 3232 | static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
72f59706 | 3233 | size_t x; |
8fe914ec LP |
3234 | char *r; |
3235 | ||
3236 | assert(s); | |
3237 | assert(percent <= 100); | |
72f59706 | 3238 | assert(new_length >= 3); |
8fe914ec | 3239 | |
72f59706 LP |
3240 | if (old_length <= 3 || old_length <= new_length) |
3241 | return strndup(s, old_length); | |
8fe914ec | 3242 | |
72f59706 LP |
3243 | r = new0(char, new_length+1); |
3244 | if (!r) | |
a6f0104a | 3245 | return NULL; |
8fe914ec | 3246 | |
72f59706 | 3247 | x = (new_length * percent) / 100; |
8fe914ec | 3248 | |
72f59706 LP |
3249 | if (x > new_length - 3) |
3250 | x = new_length - 3; | |
8fe914ec LP |
3251 | |
3252 | memcpy(r, s, x); | |
3253 | r[x] = '.'; | |
3254 | r[x+1] = '.'; | |
3255 | r[x+2] = '.'; | |
3256 | memcpy(r + x + 3, | |
72f59706 LP |
3257 | s + old_length - (new_length - x - 3), |
3258 | new_length - x - 3); | |
8fe914ec LP |
3259 | |
3260 | return r; | |
3261 | } | |
3262 | ||
f405e86d SL |
3263 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3264 | size_t x; | |
3265 | char *e; | |
3266 | const char *i, *j; | |
3267 | unsigned k, len, len2; | |
3268 | ||
3269 | assert(s); | |
3270 | assert(percent <= 100); | |
3271 | assert(new_length >= 3); | |
3272 | ||
3273 | /* if no multibyte characters use ascii_ellipsize_mem for speed */ | |
3274 | if (ascii_is_valid(s)) | |
3275 | return ascii_ellipsize_mem(s, old_length, new_length, percent); | |
3276 | ||
3277 | if (old_length <= 3 || old_length <= new_length) | |
3278 | return strndup(s, old_length); | |
3279 | ||
3280 | x = (new_length * percent) / 100; | |
3281 | ||
3282 | if (x > new_length - 3) | |
3283 | x = new_length - 3; | |
3284 | ||
3285 | k = 0; | |
3286 | for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) { | |
3287 | int c; | |
3288 | ||
3289 | c = utf8_encoded_to_unichar(i); | |
3290 | if (c < 0) | |
3291 | return NULL; | |
3292 | k += unichar_iswide(c) ? 2 : 1; | |
3293 | } | |
3294 | ||
3295 | if (k > x) /* last character was wide and went over quota */ | |
3296 | x ++; | |
3297 | ||
3298 | for (j = s + old_length; k < new_length && j > i; ) { | |
3299 | int c; | |
3300 | ||
3301 | j = utf8_prev_char(j); | |
3302 | c = utf8_encoded_to_unichar(j); | |
3303 | if (c < 0) | |
3304 | return NULL; | |
3305 | k += unichar_iswide(c) ? 2 : 1; | |
3306 | } | |
3307 | assert(i <= j); | |
3308 | ||
3309 | /* we don't actually need to ellipsize */ | |
3310 | if (i == j) | |
3311 | return memdup(s, old_length + 1); | |
3312 | ||
3313 | /* make space for ellipsis */ | |
3314 | j = utf8_next_char(j); | |
3315 | ||
3316 | len = i - s; | |
3317 | len2 = s + old_length - j; | |
3318 | e = new(char, len + 3 + len2 + 1); | |
3319 | if (!e) | |
3320 | return NULL; | |
3321 | ||
3322 | /* | |
3323 | printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n", | |
3324 | old_length, new_length, x, len, len2, k); | |
3325 | */ | |
3326 | ||
3327 | memcpy(e, s, len); | |
3328 | e[len] = 0xe2; /* tri-dot ellipsis: … */ | |
3329 | e[len + 1] = 0x80; | |
3330 | e[len + 2] = 0xa6; | |
3331 | ||
3332 | memcpy(e + len + 3, j, len2 + 1); | |
3333 | ||
3334 | return e; | |
3335 | } | |
3336 | ||
72f59706 LP |
3337 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3338 | return ellipsize_mem(s, strlen(s), length, percent); | |
3339 | } | |
3340 | ||
f6144808 LP |
3341 | int touch(const char *path) { |
3342 | int fd; | |
3343 | ||
3344 | assert(path); | |
3345 | ||
73836c5c LP |
3346 | /* This just opens the file for writing, ensuring it |
3347 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3348 | * does it. */ | |
3349 | ||
3350 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3351 | if (fd < 0) | |
f6144808 LP |
3352 | return -errno; |
3353 | ||
3354 | close_nointr_nofail(fd); | |
3355 | return 0; | |
3356 | } | |
afea26ad | 3357 | |
97c4a07d | 3358 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3359 | size_t l; |
3360 | assert(s); | |
3361 | ||
73836c5c LP |
3362 | /* This is rather stupid, simply removes the heading and |
3363 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3364 | * escaping or anything. We should make this smarter one |
3365 | * day...*/ | |
73836c5c | 3366 | |
31ed59c5 LP |
3367 | l = strlen(s); |
3368 | if (l < 2) | |
11ce3427 LP |
3369 | return strdup(s); |
3370 | ||
97c4a07d | 3371 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3372 | return strndup(s+1, l-2); |
3373 | ||
3374 | return strdup(s); | |
3375 | } | |
3376 | ||
5f7c426e | 3377 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3378 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3379 | char *eq, *r; | |
5f7c426e | 3380 | |
57f30678 LP |
3381 | eq = strchr(s, '='); |
3382 | if (!eq) { | |
3383 | char *t; | |
5f7c426e | 3384 | |
57f30678 LP |
3385 | r = strdup(s); |
3386 | if (!r) | |
5f7c426e LP |
3387 | return NULL; |
3388 | ||
57f30678 LP |
3389 | t = strstrip(r); |
3390 | if (t == r) | |
3391 | return r; | |
3392 | ||
3393 | memmove(r, t, strlen(t) + 1); | |
3394 | return r; | |
5f7c426e LP |
3395 | } |
3396 | ||
57f30678 LP |
3397 | name = strndup(s, eq - s); |
3398 | if (!name) | |
5f7c426e LP |
3399 | return NULL; |
3400 | ||
57f30678 LP |
3401 | p = strdup(eq + 1); |
3402 | if (!p) | |
5f7c426e | 3403 | return NULL; |
5f7c426e LP |
3404 | |
3405 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3406 | if (!value) |
5f7c426e | 3407 | return NULL; |
5f7c426e | 3408 | |
57f30678 | 3409 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3410 | r = NULL; |
3411 | ||
5f7c426e LP |
3412 | return r; |
3413 | } | |
3414 | ||
8e12a6ae | 3415 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3416 | siginfo_t dummy; |
3417 | ||
2e78aa99 | 3418 | assert(pid >= 1); |
1968a360 LP |
3419 | |
3420 | if (!status) | |
3421 | status = &dummy; | |
2e78aa99 LP |
3422 | |
3423 | for (;;) { | |
8e12a6ae LP |
3424 | zero(*status); |
3425 | ||
3426 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3427 | |
3428 | if (errno == EINTR) | |
3429 | continue; | |
3430 | ||
3431 | return -errno; | |
3432 | } | |
3433 | ||
3434 | return 0; | |
3435 | } | |
3436 | } | |
3437 | ||
97c4a07d LP |
3438 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3439 | int r; | |
3440 | siginfo_t status; | |
3441 | ||
3442 | assert(name); | |
3443 | assert(pid > 1); | |
3444 | ||
d87be9b0 LP |
3445 | r = wait_for_terminate(pid, &status); |
3446 | if (r < 0) { | |
97c4a07d LP |
3447 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3448 | return r; | |
3449 | } | |
3450 | ||
3451 | if (status.si_code == CLD_EXITED) { | |
3452 | if (status.si_status != 0) { | |
3453 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3454 | return status.si_status; |
97c4a07d LP |
3455 | } |
3456 | ||
3457 | log_debug("%s succeeded.", name); | |
3458 | return 0; | |
3459 | ||
3460 | } else if (status.si_code == CLD_KILLED || | |
3461 | status.si_code == CLD_DUMPED) { | |
3462 | ||
3463 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3464 | return -EPROTO; | |
3465 | } | |
3466 | ||
3467 | log_warning("%s failed due to unknown reason.", name); | |
3468 | return -EPROTO; | |
97c4a07d LP |
3469 | } |
3470 | ||
6a39419f | 3471 | _noreturn_ void freeze(void) { |
720ce21d LP |
3472 | |
3473 | /* Make sure nobody waits for us on a socket anymore */ | |
3474 | close_all_fds(NULL, 0); | |
3475 | ||
c29597a1 LP |
3476 | sync(); |
3477 | ||
3c14d26c LP |
3478 | for (;;) |
3479 | pause(); | |
3480 | } | |
3481 | ||
00dc5d76 LP |
3482 | bool null_or_empty(struct stat *st) { |
3483 | assert(st); | |
3484 | ||
3485 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3486 | return true; | |
3487 | ||
c8f26f42 | 3488 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3489 | return true; |
3490 | ||
3491 | return false; | |
3492 | } | |
3493 | ||
83096483 LP |
3494 | int null_or_empty_path(const char *fn) { |
3495 | struct stat st; | |
3496 | ||
3497 | assert(fn); | |
3498 | ||
3499 | if (stat(fn, &st) < 0) | |
3500 | return -errno; | |
3501 | ||
3502 | return null_or_empty(&st); | |
3503 | } | |
3504 | ||
a247755d | 3505 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3506 | int nfd; |
3507 | DIR *d; | |
3508 | ||
dd94c17e LP |
3509 | assert(!(flags & O_CREAT)); |
3510 | ||
3511 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
73836c5c | 3512 | if (nfd < 0) |
c4731d11 LP |
3513 | return NULL; |
3514 | ||
73836c5c LP |
3515 | d = fdopendir(nfd); |
3516 | if (!d) { | |
c4731d11 LP |
3517 | close_nointr_nofail(nfd); |
3518 | return NULL; | |
3519 | } | |
3520 | ||
3521 | return d; | |
3b63d2d3 LP |
3522 | } |
3523 | ||
8a0867d6 LP |
3524 | int signal_from_string_try_harder(const char *s) { |
3525 | int signo; | |
3526 | assert(s); | |
3527 | ||
73836c5c LP |
3528 | signo = signal_from_string(s); |
3529 | if (signo <= 0) | |
8a0867d6 LP |
3530 | if (startswith(s, "SIG")) |
3531 | return signal_from_string(s+3); | |
3532 | ||
3533 | return signo; | |
3534 | } | |
3535 | ||
383182b5 | 3536 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
22f5f628 DR |
3537 | _cleanup_free_ char *t = NULL, *u = NULL; |
3538 | char *dn; | |
3539 | size_t enc_len; | |
e23a0ce8 | 3540 | |
383182b5 DR |
3541 | u = unquote(tagvalue, "\"\'"); |
3542 | if (u == NULL) | |
3543 | return NULL; | |
e23a0ce8 | 3544 | |
1d5989fd | 3545 | enc_len = strlen(u) * 4 + 1; |
22f5f628 | 3546 | t = new(char, enc_len); |
383182b5 DR |
3547 | if (t == NULL) |
3548 | return NULL; | |
e23a0ce8 | 3549 | |
8f6ce71f | 3550 | if (encode_devnode_name(u, t, enc_len) < 0) |
22f5f628 | 3551 | return NULL; |
e23a0ce8 | 3552 | |
22f5f628 | 3553 | if (asprintf(&dn, "/dev/disk/by-%s/%s", by, t) < 0) |
383182b5 | 3554 | return NULL; |
e23a0ce8 | 3555 | |
383182b5 DR |
3556 | return dn; |
3557 | } | |
e23a0ce8 | 3558 | |
383182b5 | 3559 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3560 | assert(p); |
3561 | ||
383182b5 DR |
3562 | if (startswith(p, "LABEL=")) |
3563 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3564 | |
383182b5 DR |
3565 | if (startswith(p, "UUID=")) |
3566 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3567 | |
84cc2abf DR |
3568 | if (startswith(p, "PARTUUID=")) |
3569 | return tag_to_udev_node(p+9, "partuuid"); | |
3570 | ||
3571 | if (startswith(p, "PARTLABEL=")) | |
3572 | return tag_to_udev_node(p+10, "partlabel"); | |
3573 | ||
e23a0ce8 LP |
3574 | return strdup(p); |
3575 | } | |
3576 | ||
f212ac12 LP |
3577 | bool tty_is_vc(const char *tty) { |
3578 | assert(tty); | |
3579 | ||
3580 | if (startswith(tty, "/dev/")) | |
3581 | tty += 5; | |
3582 | ||
98a28fef LP |
3583 | return vtnr_from_tty(tty) >= 0; |
3584 | } | |
3585 | ||
d1122ad5 LP |
3586 | bool tty_is_console(const char *tty) { |
3587 | assert(tty); | |
3588 | ||
3589 | if (startswith(tty, "/dev/")) | |
3590 | tty += 5; | |
3591 | ||
3592 | return streq(tty, "console"); | |
3593 | } | |
3594 | ||
98a28fef LP |
3595 | int vtnr_from_tty(const char *tty) { |
3596 | int i, r; | |
3597 | ||
3598 | assert(tty); | |
3599 | ||
3600 | if (startswith(tty, "/dev/")) | |
3601 | tty += 5; | |
3602 | ||
3603 | if (!startswith(tty, "tty") ) | |
3604 | return -EINVAL; | |
3605 | ||
3606 | if (tty[3] < '0' || tty[3] > '9') | |
3607 | return -EINVAL; | |
3608 | ||
3609 | r = safe_atoi(tty+3, &i); | |
3610 | if (r < 0) | |
3611 | return r; | |
3612 | ||
3613 | if (i < 0 || i > 63) | |
3614 | return -EINVAL; | |
3615 | ||
3616 | return i; | |
f212ac12 LP |
3617 | } |
3618 | ||
21baf21a MS |
3619 | char *resolve_dev_console(char **active) { |
3620 | char *tty; | |
3621 | ||
3622 | /* Resolve where /dev/console is pointing to, if /sys is actually ours | |
3623 | * (i.e. not read-only-mounted which is a sign for container setups) */ | |
3624 | ||
3625 | if (path_is_read_only_fs("/sys") > 0) | |
3626 | return NULL; | |
3627 | ||
3628 | if (read_one_line_file("/sys/class/tty/console/active", active) < 0) | |
3629 | return NULL; | |
3630 | ||
3631 | /* If multiple log outputs are configured the last one is what | |
3632 | * /dev/console points to */ | |
3633 | tty = strrchr(*active, ' '); | |
3634 | if (tty) | |
3635 | tty++; | |
3636 | else | |
3637 | tty = *active; | |
3638 | ||
8aa5429a OB |
3639 | if (streq(tty, "tty0")) { |
3640 | char *tmp; | |
3641 | ||
3642 | /* Get the active VC (e.g. tty1) */ | |
3643 | if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) { | |
3644 | free(*active); | |
3645 | tty = *active = tmp; | |
3646 | } | |
3647 | } | |
3648 | ||
21baf21a MS |
3649 | return tty; |
3650 | } | |
3651 | ||
3043935f | 3652 | bool tty_is_vc_resolve(const char *tty) { |
9588bc32 | 3653 | _cleanup_free_ char *active = NULL; |
3030ccd7 | 3654 | |
e3aa71c3 LP |
3655 | assert(tty); |
3656 | ||
3657 | if (startswith(tty, "/dev/")) | |
3658 | tty += 5; | |
3659 | ||
21baf21a MS |
3660 | if (streq(tty, "console")) { |
3661 | tty = resolve_dev_console(&active); | |
3662 | if (!tty) | |
3663 | return false; | |
3664 | } | |
3030ccd7 | 3665 | |
9588bc32 | 3666 | return tty_is_vc(tty); |
3043935f LP |
3667 | } |
3668 | ||
3669 | const char *default_term_for_tty(const char *tty) { | |
3670 | assert(tty); | |
3671 | ||
acda6a05 | 3672 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3673 | } |
3674 | ||
87d2c1ff | 3675 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3676 | assert(de); |
3677 | ||
3678 | if (ignore_file(de->d_name)) | |
3679 | return false; | |
3680 | ||
3681 | if (de->d_type != DT_REG && | |
3682 | de->d_type != DT_LNK && | |
3683 | de->d_type != DT_UNKNOWN) | |
3684 | return false; | |
3685 | ||
3686 | return true; | |
3687 | } | |
3688 | ||
87d2c1ff LP |
3689 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3690 | assert(de); | |
3691 | ||
a228a22f LP |
3692 | if (de->d_type != DT_REG && |
3693 | de->d_type != DT_LNK && | |
3694 | de->d_type != DT_UNKNOWN) | |
3695 | return false; | |
3696 | ||
3697 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3698 | return false; |
3699 | ||
3700 | return endswith(de->d_name, suffix); | |
3701 | } | |
3702 | ||
83cc030f LP |
3703 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
3704 | DIR *_d = NULL; | |
3705 | struct dirent *de; | |
3706 | Hashmap *pids = NULL; | |
3707 | ||
3708 | assert(directory); | |
3709 | ||
650001c6 JJ |
3710 | /* Executes all binaries in a directory in parallel and |
3711 | * waits for them to finish. */ | |
83cc030f LP |
3712 | |
3713 | if (!d) { | |
3714 | if (!(_d = opendir(directory))) { | |
3715 | ||
3716 | if (errno == ENOENT) | |
3717 | return; | |
3718 | ||
3719 | log_error("Failed to enumerate directory %s: %m", directory); | |
3720 | return; | |
3721 | } | |
3722 | ||
3723 | d = _d; | |
3724 | } | |
3725 | ||
3726 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
3727 | log_error("Failed to allocate set."); | |
3728 | goto finish; | |
3729 | } | |
3730 | ||
3731 | while ((de = readdir(d))) { | |
3732 | char *path; | |
3733 | pid_t pid; | |
3734 | int k; | |
3735 | ||
fb19a739 | 3736 | if (!dirent_is_file(de)) |
83cc030f LP |
3737 | continue; |
3738 | ||
3739 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 3740 | log_oom(); |
83cc030f LP |
3741 | continue; |
3742 | } | |
3743 | ||
3744 | if ((pid = fork()) < 0) { | |
3745 | log_error("Failed to fork: %m"); | |
3746 | free(path); | |
3747 | continue; | |
3748 | } | |
3749 | ||
3750 | if (pid == 0) { | |
3751 | char *_argv[2]; | |
3752 | /* Child */ | |
3753 | ||
3754 | if (!argv) { | |
3755 | _argv[0] = path; | |
3756 | _argv[1] = NULL; | |
3757 | argv = _argv; | |
3758 | } else | |
6edd7d0a | 3759 | argv[0] = path; |
83cc030f LP |
3760 | |
3761 | execv(path, argv); | |
3762 | ||
3763 | log_error("Failed to execute %s: %m", path); | |
3764 | _exit(EXIT_FAILURE); | |
3765 | } | |
3766 | ||
3767 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
3768 | ||
3769 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
3770 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
3771 | free(path); | |
3772 | } | |
3773 | } | |
3774 | ||
3775 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 3776 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
b92bea5d | 3777 | siginfo_t si = {}; |
83cc030f LP |
3778 | char *path; |
3779 | ||
ec3f9b53 | 3780 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
3781 | |
3782 | if (errno == EINTR) | |
3783 | continue; | |
3784 | ||
3785 | log_error("waitid() failed: %m"); | |
3786 | goto finish; | |
3787 | } | |
3788 | ||
3789 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 3790 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
3791 | if (si.si_code == CLD_EXITED) |
3792 | log_error("%s exited with exit status %i.", path, si.si_status); | |
3793 | else | |
3794 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
3795 | } else | |
3796 | log_debug("%s exited successfully.", path); | |
3797 | ||
3798 | free(path); | |
3799 | } | |
3800 | } | |
3801 | ||
3802 | finish: | |
3803 | if (_d) | |
3804 | closedir(_d); | |
3805 | ||
3806 | if (pids) | |
3807 | hashmap_free_free(pids); | |
3808 | } | |
3809 | ||
430c18ed LP |
3810 | int kill_and_sigcont(pid_t pid, int sig) { |
3811 | int r; | |
3812 | ||
3813 | r = kill(pid, sig) < 0 ? -errno : 0; | |
3814 | ||
3815 | if (r >= 0) | |
3816 | kill(pid, SIGCONT); | |
3817 | ||
3818 | return r; | |
3819 | } | |
3820 | ||
05feefe0 LP |
3821 | bool nulstr_contains(const char*nulstr, const char *needle) { |
3822 | const char *i; | |
3823 | ||
3824 | if (!nulstr) | |
3825 | return false; | |
3826 | ||
3827 | NULSTR_FOREACH(i, nulstr) | |
3828 | if (streq(i, needle)) | |
3829 | return true; | |
3830 | ||
3831 | return false; | |
3832 | } | |
3833 | ||
6faa1114 | 3834 | bool plymouth_running(void) { |
9408a2d2 | 3835 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
3836 | } |
3837 | ||
9beb3f4d LP |
3838 | char* strshorten(char *s, size_t l) { |
3839 | assert(s); | |
3840 | ||
3841 | if (l < strlen(s)) | |
3842 | s[l] = 0; | |
3843 | ||
3844 | return s; | |
3845 | } | |
3846 | ||
3847 | static bool hostname_valid_char(char c) { | |
3848 | return | |
3849 | (c >= 'a' && c <= 'z') || | |
3850 | (c >= 'A' && c <= 'Z') || | |
3851 | (c >= '0' && c <= '9') || | |
3852 | c == '-' || | |
3853 | c == '_' || | |
3854 | c == '.'; | |
3855 | } | |
3856 | ||
3857 | bool hostname_is_valid(const char *s) { | |
3858 | const char *p; | |
aa3c5cf8 | 3859 | bool dot; |
9beb3f4d LP |
3860 | |
3861 | if (isempty(s)) | |
3862 | return false; | |
3863 | ||
aa3c5cf8 LP |
3864 | for (p = s, dot = true; *p; p++) { |
3865 | if (*p == '.') { | |
3866 | if (dot) | |
3867 | return false; | |
3868 | ||
3869 | dot = true; | |
3870 | } else { | |
3871 | if (!hostname_valid_char(*p)) | |
3872 | return false; | |
3873 | ||
3874 | dot = false; | |
3875 | } | |
3876 | } | |
3877 | ||
3878 | if (dot) | |
3879 | return false; | |
9beb3f4d LP |
3880 | |
3881 | if (p-s > HOST_NAME_MAX) | |
3882 | return false; | |
3883 | ||
3884 | return true; | |
3885 | } | |
3886 | ||
e724b063 | 3887 | char* hostname_cleanup(char *s, bool lowercase) { |
9beb3f4d | 3888 | char *p, *d; |
cec4ead9 LP |
3889 | bool dot; |
3890 | ||
3891 | for (p = s, d = s, dot = true; *p; p++) { | |
3892 | if (*p == '.') { | |
e724b063 | 3893 | if (dot) |
cec4ead9 | 3894 | continue; |
9beb3f4d | 3895 | |
e724b063 | 3896 | *(d++) = '.'; |
cec4ead9 | 3897 | dot = true; |
e724b063 LP |
3898 | } else if (hostname_valid_char(*p)) { |
3899 | *(d++) = lowercase ? tolower(*p) : *p; | |
cec4ead9 | 3900 | dot = false; |
e724b063 | 3901 | } |
cec4ead9 | 3902 | |
cec4ead9 | 3903 | } |
9beb3f4d | 3904 | |
e724b063 LP |
3905 | if (dot && d > s) |
3906 | d[-1] = 0; | |
3907 | else | |
3908 | *d = 0; | |
3909 | ||
9beb3f4d | 3910 | strshorten(s, HOST_NAME_MAX); |
cec4ead9 | 3911 | |
9beb3f4d LP |
3912 | return s; |
3913 | } | |
3914 | ||
1325aa42 | 3915 | int pipe_eof(int fd) { |
1325aa42 | 3916 | int r; |
b92bea5d ZJS |
3917 | struct pollfd pollfd = { |
3918 | .fd = fd, | |
3919 | .events = POLLIN|POLLHUP, | |
3920 | }; | |
1325aa42 LP |
3921 | |
3922 | r = poll(&pollfd, 1, 0); | |
3923 | if (r < 0) | |
3924 | return -errno; | |
3925 | ||
3926 | if (r == 0) | |
3927 | return 0; | |
3928 | ||
3929 | return pollfd.revents & POLLHUP; | |
3930 | } | |
3931 | ||
8f2d43a0 | 3932 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b | 3933 | int r; |
b92bea5d ZJS |
3934 | struct pollfd pollfd = { |
3935 | .fd = fd, | |
3936 | .events = event, | |
3937 | }; | |
df50185b | 3938 | |
8f2d43a0 | 3939 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
3940 | if (r < 0) |
3941 | return -errno; | |
3942 | ||
3943 | if (r == 0) | |
3944 | return 0; | |
3945 | ||
3946 | return pollfd.revents; | |
3947 | } | |
3948 | ||
5a3ab509 LP |
3949 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
3950 | FILE *f; | |
3951 | char *t; | |
3952 | const char *fn; | |
3953 | size_t k; | |
3954 | int fd; | |
3955 | ||
3956 | assert(path); | |
3957 | assert(_f); | |
3958 | assert(_temp_path); | |
3959 | ||
3960 | t = new(char, strlen(path) + 1 + 6 + 1); | |
3961 | if (!t) | |
3962 | return -ENOMEM; | |
3963 | ||
9eb977db | 3964 | fn = path_get_file_name(path); |
5a3ab509 LP |
3965 | k = fn-path; |
3966 | memcpy(t, path, k); | |
3967 | t[k] = '.'; | |
3968 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
3969 | ||
3970 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
3971 | if (fd < 0) { | |
3972 | free(t); | |
3973 | return -errno; | |
3974 | } | |
3975 | ||
3976 | f = fdopen(fd, "we"); | |
3977 | if (!f) { | |
3978 | unlink(t); | |
3979 | free(t); | |
3980 | return -errno; | |
3981 | } | |
3982 | ||
3983 | *_f = f; | |
3984 | *_temp_path = t; | |
3985 | ||
3986 | return 0; | |
3987 | } | |
3988 | ||
6ea832a2 | 3989 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
3990 | assert(fd >= 0); |
3991 | ||
6ea832a2 LP |
3992 | if (ioctl(fd, TIOCVHANGUP) < 0) |
3993 | return -errno; | |
3994 | ||
3995 | return 0; | |
3996 | } | |
3997 | ||
3998 | int terminal_vhangup(const char *name) { | |
3999 | int fd, r; | |
4000 | ||
4001 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4002 | if (fd < 0) | |
4003 | return fd; | |
4004 | ||
4005 | r = terminal_vhangup_fd(fd); | |
4006 | close_nointr_nofail(fd); | |
4007 | ||
4008 | return r; | |
4009 | } | |
4010 | ||
4011 | int vt_disallocate(const char *name) { | |
4012 | int fd, r; | |
4013 | unsigned u; | |
6ea832a2 LP |
4014 | |
4015 | /* Deallocate the VT if possible. If not possible | |
4016 | * (i.e. because it is the active one), at least clear it | |
4017 | * entirely (including the scrollback buffer) */ | |
4018 | ||
b83bc4e9 LP |
4019 | if (!startswith(name, "/dev/")) |
4020 | return -EINVAL; | |
4021 | ||
4022 | if (!tty_is_vc(name)) { | |
4023 | /* So this is not a VT. I guess we cannot deallocate | |
4024 | * it then. But let's at least clear the screen */ | |
4025 | ||
4026 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4027 | if (fd < 0) | |
4028 | return fd; | |
4029 | ||
8585357a LP |
4030 | loop_write(fd, |
4031 | "\033[r" /* clear scrolling region */ | |
4032 | "\033[H" /* move home */ | |
4033 | "\033[2J", /* clear screen */ | |
4034 | 10, false); | |
b83bc4e9 LP |
4035 | close_nointr_nofail(fd); |
4036 | ||
4037 | return 0; | |
4038 | } | |
6ea832a2 LP |
4039 | |
4040 | if (!startswith(name, "/dev/tty")) | |
4041 | return -EINVAL; | |
4042 | ||
4043 | r = safe_atou(name+8, &u); | |
4044 | if (r < 0) | |
4045 | return r; | |
4046 | ||
4047 | if (u <= 0) | |
b83bc4e9 | 4048 | return -EINVAL; |
6ea832a2 | 4049 | |
b83bc4e9 | 4050 | /* Try to deallocate */ |
6ea832a2 LP |
4051 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4052 | if (fd < 0) | |
4053 | return fd; | |
4054 | ||
4055 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4056 | close_nointr_nofail(fd); |
6ea832a2 | 4057 | |
b83bc4e9 LP |
4058 | if (r >= 0) |
4059 | return 0; | |
6ea832a2 | 4060 | |
b83bc4e9 | 4061 | if (errno != EBUSY) |
6ea832a2 | 4062 | return -errno; |
6ea832a2 | 4063 | |
b83bc4e9 LP |
4064 | /* Couldn't deallocate, so let's clear it fully with |
4065 | * scrollback */ | |
4066 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4067 | if (fd < 0) |
b83bc4e9 | 4068 | return fd; |
6ea832a2 | 4069 | |
8585357a LP |
4070 | loop_write(fd, |
4071 | "\033[r" /* clear scrolling region */ | |
4072 | "\033[H" /* move home */ | |
4073 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4074 | 10, false); | |
b83bc4e9 | 4075 | close_nointr_nofail(fd); |
6ea832a2 | 4076 | |
b83bc4e9 | 4077 | return 0; |
6ea832a2 LP |
4078 | } |
4079 | ||
51045322 LP |
4080 | int copy_file(const char *from, const char *to, int flags) { |
4081 | _cleanup_close_ int fdf = -1; | |
4082 | int r, fdt; | |
34ca941c LP |
4083 | |
4084 | assert(from); | |
4085 | assert(to); | |
4086 | ||
4087 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4088 | if (fdf < 0) | |
4089 | return -errno; | |
4090 | ||
51045322 LP |
4091 | fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); |
4092 | if (fdt < 0) | |
34ca941c | 4093 | return -errno; |
34ca941c LP |
4094 | |
4095 | for (;;) { | |
4096 | char buf[PIPE_BUF]; | |
4097 | ssize_t n, k; | |
4098 | ||
4099 | n = read(fdf, buf, sizeof(buf)); | |
4100 | if (n < 0) { | |
4101 | r = -errno; | |
4102 | ||
34ca941c LP |
4103 | close_nointr(fdt); |
4104 | unlink(to); | |
4105 | ||
4106 | return r; | |
4107 | } | |
4108 | ||
4109 | if (n == 0) | |
4110 | break; | |
4111 | ||
4112 | errno = 0; | |
4113 | k = loop_write(fdt, buf, n, false); | |
4114 | if (n != k) { | |
4115 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4116 | ||
34ca941c | 4117 | close_nointr(fdt); |
34ca941c | 4118 | unlink(to); |
51045322 | 4119 | |
34ca941c LP |
4120 | return r; |
4121 | } | |
4122 | } | |
4123 | ||
34ca941c LP |
4124 | r = close_nointr(fdt); |
4125 | ||
4126 | if (r < 0) { | |
4127 | unlink(to); | |
4128 | return r; | |
4129 | } | |
4130 | ||
4131 | return 0; | |
4132 | } | |
4133 | ||
424a19f8 LP |
4134 | int symlink_atomic(const char *from, const char *to) { |
4135 | char *x; | |
4136 | _cleanup_free_ char *t; | |
34ca941c LP |
4137 | const char *fn; |
4138 | size_t k; | |
4139 | unsigned long long ull; | |
4140 | unsigned i; | |
4141 | int r; | |
4142 | ||
4143 | assert(from); | |
4144 | assert(to); | |
4145 | ||
4146 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4147 | if (!t) | |
4148 | return -ENOMEM; | |
4149 | ||
9eb977db | 4150 | fn = path_get_file_name(to); |
34ca941c LP |
4151 | k = fn-to; |
4152 | memcpy(t, to, k); | |
4153 | t[k] = '.'; | |
4154 | x = stpcpy(t+k+1, fn); | |
4155 | ||
4156 | ull = random_ull(); | |
4157 | for (i = 0; i < 16; i++) { | |
4158 | *(x++) = hexchar(ull & 0xF); | |
4159 | ull >>= 4; | |
4160 | } | |
4161 | ||
4162 | *x = 0; | |
4163 | ||
424a19f8 LP |
4164 | if (symlink(from, t) < 0) |
4165 | return -errno; | |
34ca941c LP |
4166 | |
4167 | if (rename(t, to) < 0) { | |
4168 | r = -errno; | |
4169 | unlink(t); | |
34ca941c LP |
4170 | return r; |
4171 | } | |
4172 | ||
424a19f8 | 4173 | return 0; |
34ca941c LP |
4174 | } |
4175 | ||
4d6d6518 LP |
4176 | bool display_is_local(const char *display) { |
4177 | assert(display); | |
4178 | ||
4179 | return | |
4180 | display[0] == ':' && | |
4181 | display[1] >= '0' && | |
4182 | display[1] <= '9'; | |
4183 | } | |
4184 | ||
4185 | int socket_from_display(const char *display, char **path) { | |
4186 | size_t k; | |
4187 | char *f, *c; | |
4188 | ||
4189 | assert(display); | |
4190 | assert(path); | |
4191 | ||
4192 | if (!display_is_local(display)) | |
4193 | return -EINVAL; | |
4194 | ||
4195 | k = strspn(display+1, "0123456789"); | |
4196 | ||
4197 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4198 | if (!f) | |
4199 | return -ENOMEM; | |
4200 | ||
4201 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4202 | memcpy(c, display+1, k); | |
4203 | c[k] = 0; | |
4204 | ||
4205 | *path = f; | |
4206 | ||
4207 | return 0; | |
4208 | } | |
4209 | ||
d05c5031 LP |
4210 | int get_user_creds( |
4211 | const char **username, | |
4212 | uid_t *uid, gid_t *gid, | |
4213 | const char **home, | |
4214 | const char **shell) { | |
4215 | ||
1cccf435 | 4216 | struct passwd *p; |
ddd88763 | 4217 | uid_t u; |
1cccf435 MV |
4218 | |
4219 | assert(username); | |
4220 | assert(*username); | |
1cccf435 MV |
4221 | |
4222 | /* We enforce some special rules for uid=0: in order to avoid | |
4223 | * NSS lookups for root we hardcode its data. */ | |
4224 | ||
4225 | if (streq(*username, "root") || streq(*username, "0")) { | |
4226 | *username = "root"; | |
4b67834e LP |
4227 | |
4228 | if (uid) | |
4229 | *uid = 0; | |
4230 | ||
4231 | if (gid) | |
4232 | *gid = 0; | |
4233 | ||
4234 | if (home) | |
4235 | *home = "/root"; | |
d05c5031 LP |
4236 | |
4237 | if (shell) | |
4238 | *shell = "/bin/sh"; | |
4239 | ||
1cccf435 MV |
4240 | return 0; |
4241 | } | |
4242 | ||
ddd88763 | 4243 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4244 | errno = 0; |
ddd88763 | 4245 | p = getpwuid(u); |
1cccf435 MV |
4246 | |
4247 | /* If there are multiple users with the same id, make | |
4248 | * sure to leave $USER to the configured value instead | |
4249 | * of the first occurrence in the database. However if | |
4250 | * the uid was configured by a numeric uid, then let's | |
4251 | * pick the real username from /etc/passwd. */ | |
4252 | if (p) | |
4253 | *username = p->pw_name; | |
4254 | } else { | |
4255 | errno = 0; | |
4256 | p = getpwnam(*username); | |
4257 | } | |
4258 | ||
4259 | if (!p) | |
8333c77e | 4260 | return errno > 0 ? -errno : -ESRCH; |
1cccf435 | 4261 | |
4b67834e LP |
4262 | if (uid) |
4263 | *uid = p->pw_uid; | |
4264 | ||
4265 | if (gid) | |
4266 | *gid = p->pw_gid; | |
4267 | ||
4268 | if (home) | |
4269 | *home = p->pw_dir; | |
4270 | ||
d05c5031 LP |
4271 | if (shell) |
4272 | *shell = p->pw_shell; | |
4273 | ||
4b67834e LP |
4274 | return 0; |
4275 | } | |
4276 | ||
59164be4 LP |
4277 | char* uid_to_name(uid_t uid) { |
4278 | struct passwd *p; | |
4279 | char *r; | |
4280 | ||
4281 | if (uid == 0) | |
4282 | return strdup("root"); | |
4283 | ||
4284 | p = getpwuid(uid); | |
4285 | if (p) | |
4286 | return strdup(p->pw_name); | |
4287 | ||
4288 | if (asprintf(&r, "%lu", (unsigned long) uid) < 0) | |
4289 | return NULL; | |
4290 | ||
4291 | return r; | |
4292 | } | |
4293 | ||
4468addc LP |
4294 | char* gid_to_name(gid_t gid) { |
4295 | struct group *p; | |
4296 | char *r; | |
4297 | ||
4298 | if (gid == 0) | |
4299 | return strdup("root"); | |
4300 | ||
4301 | p = getgrgid(gid); | |
4302 | if (p) | |
4303 | return strdup(p->gr_name); | |
4304 | ||
4305 | if (asprintf(&r, "%lu", (unsigned long) gid) < 0) | |
4306 | return NULL; | |
4307 | ||
4308 | return r; | |
4309 | } | |
4310 | ||
4b67834e LP |
4311 | int get_group_creds(const char **groupname, gid_t *gid) { |
4312 | struct group *g; | |
4313 | gid_t id; | |
4314 | ||
4315 | assert(groupname); | |
4316 | ||
4317 | /* We enforce some special rules for gid=0: in order to avoid | |
4318 | * NSS lookups for root we hardcode its data. */ | |
4319 | ||
4320 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4321 | *groupname = "root"; | |
4322 | ||
4323 | if (gid) | |
4324 | *gid = 0; | |
4325 | ||
4326 | return 0; | |
4327 | } | |
4328 | ||
4329 | if (parse_gid(*groupname, &id) >= 0) { | |
4330 | errno = 0; | |
4331 | g = getgrgid(id); | |
4332 | ||
4333 | if (g) | |
4334 | *groupname = g->gr_name; | |
4335 | } else { | |
4336 | errno = 0; | |
4337 | g = getgrnam(*groupname); | |
4338 | } | |
4339 | ||
4340 | if (!g) | |
8333c77e | 4341 | return errno > 0 ? -errno : -ESRCH; |
4b67834e LP |
4342 | |
4343 | if (gid) | |
4344 | *gid = g->gr_gid; | |
4345 | ||
1cccf435 MV |
4346 | return 0; |
4347 | } | |
4348 | ||
4468addc LP |
4349 | int in_gid(gid_t gid) { |
4350 | gid_t *gids; | |
43673799 LP |
4351 | int ngroups_max, r, i; |
4352 | ||
43673799 LP |
4353 | if (getgid() == gid) |
4354 | return 1; | |
4355 | ||
4356 | if (getegid() == gid) | |
4357 | return 1; | |
4358 | ||
4359 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4360 | assert(ngroups_max > 0); | |
4361 | ||
4362 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4363 | ||
4364 | r = getgroups(ngroups_max, gids); | |
4365 | if (r < 0) | |
4366 | return -errno; | |
4367 | ||
4368 | for (i = 0; i < r; i++) | |
4369 | if (gids[i] == gid) | |
4370 | return 1; | |
4371 | ||
4372 | return 0; | |
4373 | } | |
4374 | ||
4468addc LP |
4375 | int in_group(const char *name) { |
4376 | int r; | |
4377 | gid_t gid; | |
4378 | ||
4379 | r = get_group_creds(&name, &gid); | |
4380 | if (r < 0) | |
4381 | return r; | |
4382 | ||
4383 | return in_gid(gid); | |
4384 | } | |
4385 | ||
8092a428 | 4386 | int glob_exists(const char *path) { |
7fd1b19b | 4387 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 4388 | int k; |
8092a428 LP |
4389 | |
4390 | assert(path); | |
4391 | ||
8092a428 LP |
4392 | errno = 0; |
4393 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4394 | ||
4395 | if (k == GLOB_NOMATCH) | |
8d98da3f | 4396 | return 0; |
8092a428 | 4397 | else if (k == GLOB_NOSPACE) |
8d98da3f | 4398 | return -ENOMEM; |
8092a428 | 4399 | else if (k == 0) |
8d98da3f | 4400 | return !strv_isempty(g.gl_pathv); |
8092a428 | 4401 | else |
8d98da3f ZJS |
4402 | return errno ? -errno : -EIO; |
4403 | } | |
8092a428 | 4404 | |
8d98da3f ZJS |
4405 | int glob_extend(char ***strv, const char *path) { |
4406 | _cleanup_globfree_ glob_t g = {}; | |
4407 | int k; | |
4408 | char **p; | |
4409 | ||
4410 | errno = 0; | |
a8ccacf5 | 4411 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
4412 | |
4413 | if (k == GLOB_NOMATCH) | |
4414 | return -ENOENT; | |
4415 | else if (k == GLOB_NOSPACE) | |
4416 | return -ENOMEM; | |
4417 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
4418 | return errno ? -errno : -EIO; | |
4419 | ||
4420 | STRV_FOREACH(p, g.gl_pathv) { | |
4421 | k = strv_extend(strv, *p); | |
4422 | if (k < 0) | |
4423 | break; | |
4424 | } | |
4425 | ||
4426 | return k; | |
8092a428 LP |
4427 | } |
4428 | ||
83096483 LP |
4429 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4430 | struct stat st; | |
4431 | ||
4432 | assert(d); | |
4433 | assert(de); | |
4434 | ||
4435 | if (de->d_type != DT_UNKNOWN) | |
4436 | return 0; | |
4437 | ||
4438 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4439 | return -errno; | |
4440 | ||
4441 | de->d_type = | |
4442 | S_ISREG(st.st_mode) ? DT_REG : | |
4443 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4444 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4445 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4446 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4447 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4448 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4449 | DT_UNKNOWN; | |
4450 | ||
4451 | return 0; | |
4452 | } | |
4453 | ||
4454 | int in_search_path(const char *path, char **search) { | |
893fa014 ZJS |
4455 | char **i; |
4456 | _cleanup_free_ char *parent = NULL; | |
83096483 LP |
4457 | int r; |
4458 | ||
9eb977db | 4459 | r = path_get_parent(path, &parent); |
83096483 LP |
4460 | if (r < 0) |
4461 | return r; | |
4462 | ||
893fa014 ZJS |
4463 | STRV_FOREACH(i, search) |
4464 | if (path_equal(parent, *i)) | |
4465 | return 1; | |
83096483 | 4466 | |
893fa014 | 4467 | return 0; |
83096483 LP |
4468 | } |
4469 | ||
034a2a52 | 4470 | int get_files_in_directory(const char *path, char ***list) { |
893fa014 ZJS |
4471 | _cleanup_closedir_ DIR *d = NULL; |
4472 | size_t bufsize = 0, n = 0; | |
4473 | _cleanup_strv_free_ char **l = NULL; | |
034a2a52 LP |
4474 | |
4475 | assert(path); | |
d60ef526 LP |
4476 | |
4477 | /* Returns all files in a directory in *list, and the number | |
4478 | * of files as return value. If list is NULL returns only the | |
893fa014 | 4479 | * number. */ |
034a2a52 LP |
4480 | |
4481 | d = opendir(path); | |
8ea913b2 LP |
4482 | if (!d) |
4483 | return -errno; | |
4484 | ||
034a2a52 | 4485 | for (;;) { |
7d5e9c0f LP |
4486 | struct dirent *de; |
4487 | union dirent_storage buf; | |
034a2a52 LP |
4488 | int k; |
4489 | ||
7d5e9c0f | 4490 | k = readdir_r(d, &buf.de, &de); |
893fa014 ZJS |
4491 | assert(k >= 0); |
4492 | if (k > 0) | |
4493 | return -k; | |
034a2a52 LP |
4494 | if (!de) |
4495 | break; | |
4496 | ||
4497 | dirent_ensure_type(d, de); | |
4498 | ||
4499 | if (!dirent_is_file(de)) | |
4500 | continue; | |
4501 | ||
d60ef526 | 4502 | if (list) { |
893fa014 ZJS |
4503 | /* one extra slot is needed for the terminating NULL */ |
4504 | if (!GREEDY_REALLOC(l, bufsize, n + 2)) | |
4505 | return -ENOMEM; | |
034a2a52 | 4506 | |
893fa014 ZJS |
4507 | l[n] = strdup(de->d_name); |
4508 | if (!l[n]) | |
4509 | return -ENOMEM; | |
034a2a52 | 4510 | |
893fa014 | 4511 | l[++n] = NULL; |
d60ef526 | 4512 | } else |
893fa014 | 4513 | n++; |
034a2a52 LP |
4514 | } |
4515 | ||
893fa014 ZJS |
4516 | if (list) { |
4517 | *list = l; | |
4518 | l = NULL; /* avoid freeing */ | |
4519 | } | |
034a2a52 | 4520 | |
893fa014 | 4521 | return n; |
034a2a52 LP |
4522 | } |
4523 | ||
b7def684 | 4524 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4525 | va_list ap; |
4526 | size_t l; | |
4527 | char *r, *p; | |
4528 | ||
4529 | va_start(ap, x); | |
4530 | ||
4531 | if (x) { | |
4532 | l = strlen(x); | |
4533 | ||
4534 | for (;;) { | |
4535 | const char *t; | |
040f18ea | 4536 | size_t n; |
911a4828 LP |
4537 | |
4538 | t = va_arg(ap, const char *); | |
4539 | if (!t) | |
4540 | break; | |
4541 | ||
040f18ea | 4542 | n = strlen(t); |
e98055de LN |
4543 | if (n > ((size_t) -1) - l) { |
4544 | va_end(ap); | |
040f18ea | 4545 | return NULL; |
e98055de | 4546 | } |
040f18ea LP |
4547 | |
4548 | l += n; | |
911a4828 LP |
4549 | } |
4550 | } else | |
4551 | l = 0; | |
4552 | ||
4553 | va_end(ap); | |
4554 | ||
4555 | r = new(char, l+1); | |
4556 | if (!r) | |
4557 | return NULL; | |
4558 | ||
4559 | if (x) { | |
4560 | p = stpcpy(r, x); | |
4561 | ||
4562 | va_start(ap, x); | |
4563 | ||
4564 | for (;;) { | |
4565 | const char *t; | |
4566 | ||
4567 | t = va_arg(ap, const char *); | |
4568 | if (!t) | |
4569 | break; | |
4570 | ||
4571 | p = stpcpy(p, t); | |
4572 | } | |
8ea913b2 LP |
4573 | |
4574 | va_end(ap); | |
911a4828 LP |
4575 | } else |
4576 | r[0] = 0; | |
4577 | ||
4578 | return r; | |
4579 | } | |
4580 | ||
b636465b LP |
4581 | bool is_main_thread(void) { |
4582 | static __thread int cached = 0; | |
4583 | ||
4584 | if (_unlikely_(cached == 0)) | |
4585 | cached = getpid() == gettid() ? 1 : -1; | |
4586 | ||
4587 | return cached > 0; | |
4588 | } | |
4589 | ||
94959f0f LP |
4590 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4591 | char *p, *s; | |
4592 | int r; | |
4593 | unsigned n, m; | |
4594 | ||
4595 | assert(ret); | |
4596 | ||
4597 | /* If it has a queue this is good enough for us */ | |
4598 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4599 | return -ENOMEM; | |
4600 | ||
4601 | r = access(p, F_OK); | |
4602 | free(p); | |
4603 | ||
4604 | if (r >= 0) { | |
4605 | *ret = d; | |
4606 | return 0; | |
4607 | } | |
4608 | ||
4609 | /* If it is a partition find the originating device */ | |
4610 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4611 | return -ENOMEM; | |
4612 | ||
4613 | r = access(p, F_OK); | |
4614 | free(p); | |
4615 | ||
4616 | if (r < 0) | |
4617 | return -ENOENT; | |
4618 | ||
4619 | /* Get parent dev_t */ | |
4620 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4621 | return -ENOMEM; | |
4622 | ||
4623 | r = read_one_line_file(p, &s); | |
4624 | free(p); | |
4625 | ||
4626 | if (r < 0) | |
4627 | return r; | |
4628 | ||
4629 | r = sscanf(s, "%u:%u", &m, &n); | |
4630 | free(s); | |
4631 | ||
4632 | if (r != 2) | |
4633 | return -EINVAL; | |
4634 | ||
4635 | /* Only return this if it is really good enough for us. */ | |
4636 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4637 | return -ENOMEM; | |
4638 | ||
4639 | r = access(p, F_OK); | |
4640 | free(p); | |
4641 | ||
4642 | if (r >= 0) { | |
4643 | *ret = makedev(m, n); | |
4644 | return 0; | |
4645 | } | |
4646 | ||
4647 | return -ENOENT; | |
4648 | } | |
4649 | ||
8d53b453 | 4650 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4651 | struct stat st; |
4652 | ||
4653 | assert(p); | |
4654 | ||
4655 | if (lstat(p, &st) < 0) | |
4656 | return -errno; | |
4657 | ||
4658 | return | |
8d53b453 | 4659 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4660 | (st.st_mode & S_ISVTX); |
4661 | } | |
94959f0f | 4662 | |
f41607a6 LP |
4663 | static const char *const ioprio_class_table[] = { |
4664 | [IOPRIO_CLASS_NONE] = "none", | |
4665 | [IOPRIO_CLASS_RT] = "realtime", | |
4666 | [IOPRIO_CLASS_BE] = "best-effort", | |
4667 | [IOPRIO_CLASS_IDLE] = "idle" | |
4668 | }; | |
4669 | ||
f8b69d1d | 4670 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4671 | |
4672 | static const char *const sigchld_code_table[] = { | |
4673 | [CLD_EXITED] = "exited", | |
4674 | [CLD_KILLED] = "killed", | |
4675 | [CLD_DUMPED] = "dumped", | |
4676 | [CLD_TRAPPED] = "trapped", | |
4677 | [CLD_STOPPED] = "stopped", | |
4678 | [CLD_CONTINUED] = "continued", | |
4679 | }; | |
4680 | ||
4681 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4682 | ||
4683 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4684 | [LOG_FAC(LOG_KERN)] = "kern", | |
4685 | [LOG_FAC(LOG_USER)] = "user", | |
4686 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4687 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4688 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4689 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4690 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4691 | [LOG_FAC(LOG_NEWS)] = "news", | |
4692 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4693 | [LOG_FAC(LOG_CRON)] = "cron", | |
4694 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4695 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4696 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4697 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4698 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4699 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4700 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4701 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4702 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4703 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4704 | }; | |
4705 | ||
f8b69d1d | 4706 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4707 | |
4708 | static const char *const log_level_table[] = { | |
4709 | [LOG_EMERG] = "emerg", | |
4710 | [LOG_ALERT] = "alert", | |
4711 | [LOG_CRIT] = "crit", | |
4712 | [LOG_ERR] = "err", | |
4713 | [LOG_WARNING] = "warning", | |
4714 | [LOG_NOTICE] = "notice", | |
4715 | [LOG_INFO] = "info", | |
4716 | [LOG_DEBUG] = "debug" | |
4717 | }; | |
4718 | ||
f8b69d1d | 4719 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4720 | |
4721 | static const char* const sched_policy_table[] = { | |
4722 | [SCHED_OTHER] = "other", | |
4723 | [SCHED_BATCH] = "batch", | |
4724 | [SCHED_IDLE] = "idle", | |
4725 | [SCHED_FIFO] = "fifo", | |
4726 | [SCHED_RR] = "rr" | |
4727 | }; | |
4728 | ||
f8b69d1d | 4729 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 LP |
4730 | |
4731 | static const char* const rlimit_table[] = { | |
4732 | [RLIMIT_CPU] = "LimitCPU", | |
4733 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4734 | [RLIMIT_DATA] = "LimitDATA", | |
4735 | [RLIMIT_STACK] = "LimitSTACK", | |
4736 | [RLIMIT_CORE] = "LimitCORE", | |
4737 | [RLIMIT_RSS] = "LimitRSS", | |
4738 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4739 | [RLIMIT_AS] = "LimitAS", | |
4740 | [RLIMIT_NPROC] = "LimitNPROC", | |
4741 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4742 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4743 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4744 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4745 | [RLIMIT_NICE] = "LimitNICE", | |
4746 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4747 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4748 | }; | |
4749 | ||
4750 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4751 | ||
4752 | static const char* const ip_tos_table[] = { | |
4753 | [IPTOS_LOWDELAY] = "low-delay", | |
4754 | [IPTOS_THROUGHPUT] = "throughput", | |
4755 | [IPTOS_RELIABILITY] = "reliability", | |
4756 | [IPTOS_LOWCOST] = "low-cost", | |
4757 | }; | |
4758 | ||
f8b69d1d | 4759 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4760 | |
4e240ab0 | 4761 | static const char *const __signal_table[] = { |
f41607a6 LP |
4762 | [SIGHUP] = "HUP", |
4763 | [SIGINT] = "INT", | |
4764 | [SIGQUIT] = "QUIT", | |
4765 | [SIGILL] = "ILL", | |
4766 | [SIGTRAP] = "TRAP", | |
4767 | [SIGABRT] = "ABRT", | |
4768 | [SIGBUS] = "BUS", | |
4769 | [SIGFPE] = "FPE", | |
4770 | [SIGKILL] = "KILL", | |
4771 | [SIGUSR1] = "USR1", | |
4772 | [SIGSEGV] = "SEGV", | |
4773 | [SIGUSR2] = "USR2", | |
4774 | [SIGPIPE] = "PIPE", | |
4775 | [SIGALRM] = "ALRM", | |
4776 | [SIGTERM] = "TERM", | |
4777 | #ifdef SIGSTKFLT | |
4778 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4779 | #endif | |
4780 | [SIGCHLD] = "CHLD", | |
4781 | [SIGCONT] = "CONT", | |
4782 | [SIGSTOP] = "STOP", | |
4783 | [SIGTSTP] = "TSTP", | |
4784 | [SIGTTIN] = "TTIN", | |
4785 | [SIGTTOU] = "TTOU", | |
4786 | [SIGURG] = "URG", | |
4787 | [SIGXCPU] = "XCPU", | |
4788 | [SIGXFSZ] = "XFSZ", | |
4789 | [SIGVTALRM] = "VTALRM", | |
4790 | [SIGPROF] = "PROF", | |
4791 | [SIGWINCH] = "WINCH", | |
4792 | [SIGIO] = "IO", | |
4793 | [SIGPWR] = "PWR", | |
4794 | [SIGSYS] = "SYS" | |
4795 | }; | |
4796 | ||
4e240ab0 MS |
4797 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4798 | ||
4799 | const char *signal_to_string(int signo) { | |
fa70beaa | 4800 | static __thread char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1]; |
4e240ab0 MS |
4801 | const char *name; |
4802 | ||
4803 | name = __signal_to_string(signo); | |
4804 | if (name) | |
4805 | return name; | |
4806 | ||
4807 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
fa70beaa | 4808 | snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN); |
4e240ab0 | 4809 | else |
fa70beaa LP |
4810 | snprintf(buf, sizeof(buf), "%d", signo); |
4811 | ||
4e240ab0 MS |
4812 | return buf; |
4813 | } | |
4814 | ||
4815 | int signal_from_string(const char *s) { | |
4816 | int signo; | |
4817 | int offset = 0; | |
4818 | unsigned u; | |
4819 | ||
040f18ea | 4820 | signo = __signal_from_string(s); |
4e240ab0 MS |
4821 | if (signo > 0) |
4822 | return signo; | |
4823 | ||
4824 | if (startswith(s, "RTMIN+")) { | |
4825 | s += 6; | |
4826 | offset = SIGRTMIN; | |
4827 | } | |
4828 | if (safe_atou(s, &u) >= 0) { | |
4829 | signo = (int) u + offset; | |
4830 | if (signo > 0 && signo < _NSIG) | |
4831 | return signo; | |
4832 | } | |
4833 | return -1; | |
4834 | } | |
65457142 FC |
4835 | |
4836 | bool kexec_loaded(void) { | |
4837 | bool loaded = false; | |
4838 | char *s; | |
4839 | ||
4840 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
4841 | if (s[0] == '1') | |
4842 | loaded = true; | |
4843 | free(s); | |
4844 | } | |
4845 | return loaded; | |
4846 | } | |
fb9de93d LP |
4847 | |
4848 | int strdup_or_null(const char *a, char **b) { | |
4849 | char *c; | |
4850 | ||
4851 | assert(b); | |
4852 | ||
4853 | if (!a) { | |
4854 | *b = NULL; | |
4855 | return 0; | |
4856 | } | |
4857 | ||
4858 | c = strdup(a); | |
4859 | if (!c) | |
4860 | return -ENOMEM; | |
4861 | ||
4862 | *b = c; | |
4863 | return 0; | |
4864 | } | |
64685e0c | 4865 | |
87d2c1ff LP |
4866 | int prot_from_flags(int flags) { |
4867 | ||
4868 | switch (flags & O_ACCMODE) { | |
4869 | ||
4870 | case O_RDONLY: | |
4871 | return PROT_READ; | |
4872 | ||
4873 | case O_WRONLY: | |
4874 | return PROT_WRITE; | |
4875 | ||
4876 | case O_RDWR: | |
4877 | return PROT_READ|PROT_WRITE; | |
4878 | ||
4879 | default: | |
4880 | return -EINVAL; | |
4881 | } | |
7c99e0c1 | 4882 | } |
689b9a22 | 4883 | |
babfc091 | 4884 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 4885 | unsigned i; |
babfc091 LP |
4886 | |
4887 | static const struct { | |
4888 | const char *suffix; | |
4889 | off_t factor; | |
4890 | } table[] = { | |
32895bb3 LP |
4891 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
4892 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
4893 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
4894 | { "G", 1024ULL*1024ULL*1024ULL }, | |
4895 | { "M", 1024ULL*1024ULL }, | |
4896 | { "K", 1024ULL }, | |
4897 | }; | |
4898 | ||
4899 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
4900 | ||
4901 | if (t >= table[i].factor) { | |
4902 | snprintf(buf, l, | |
4903 | "%llu.%llu%s", | |
4904 | (unsigned long long) (t / table[i].factor), | |
4905 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
4906 | table[i].suffix); | |
4907 | ||
4908 | goto finish; | |
4909 | } | |
4910 | } | |
4911 | ||
4912 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
4913 | ||
4914 | finish: | |
4915 | buf[l-1] = 0; | |
4916 | return buf; | |
4917 | ||
4918 | } | |
55d7bfc1 LP |
4919 | |
4920 | void* memdup(const void *p, size_t l) { | |
4921 | void *r; | |
4922 | ||
4923 | assert(p); | |
4924 | ||
4925 | r = malloc(l); | |
4926 | if (!r) | |
4927 | return NULL; | |
4928 | ||
4929 | memcpy(r, p, l); | |
4930 | return r; | |
4931 | } | |
bb99a35a LP |
4932 | |
4933 | int fd_inc_sndbuf(int fd, size_t n) { | |
4934 | int r, value; | |
4935 | socklen_t l = sizeof(value); | |
4936 | ||
4937 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
4938 | if (r >= 0 && | |
4939 | l == sizeof(value) && | |
4940 | (size_t) value >= n*2) | |
4941 | return 0; | |
4942 | ||
4943 | value = (int) n; | |
4944 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
4945 | if (r < 0) | |
4946 | return -errno; | |
4947 | ||
4948 | return 1; | |
4949 | } | |
4950 | ||
4951 | int fd_inc_rcvbuf(int fd, size_t n) { | |
4952 | int r, value; | |
4953 | socklen_t l = sizeof(value); | |
4954 | ||
4955 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
4956 | if (r >= 0 && | |
4957 | l == sizeof(value) && | |
4958 | (size_t) value >= n*2) | |
4959 | return 0; | |
4960 | ||
4961 | value = (int) n; | |
4962 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
4963 | if (r < 0) | |
4964 | return -errno; | |
4965 | ||
4966 | return 1; | |
4967 | } | |
6bb92a16 | 4968 | |
9bdc770c | 4969 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
4970 | pid_t parent_pid, agent_pid; |
4971 | int fd; | |
4972 | bool stdout_is_tty, stderr_is_tty; | |
4973 | unsigned n, i; | |
4974 | va_list ap; | |
4975 | char **l; | |
4976 | ||
4977 | assert(pid); | |
4978 | assert(path); | |
4979 | ||
4980 | parent_pid = getpid(); | |
4981 | ||
4982 | /* Spawns a temporary TTY agent, making sure it goes away when | |
4983 | * we go away */ | |
4984 | ||
4985 | agent_pid = fork(); | |
4986 | if (agent_pid < 0) | |
4987 | return -errno; | |
4988 | ||
4989 | if (agent_pid != 0) { | |
4990 | *pid = agent_pid; | |
4991 | return 0; | |
4992 | } | |
4993 | ||
4994 | /* In the child: | |
4995 | * | |
4996 | * Make sure the agent goes away when the parent dies */ | |
4997 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
4998 | _exit(EXIT_FAILURE); | |
4999 | ||
5000 | /* Check whether our parent died before we were able | |
5001 | * to set the death signal */ | |
5002 | if (getppid() != parent_pid) | |
5003 | _exit(EXIT_SUCCESS); | |
5004 | ||
5005 | /* Don't leak fds to the agent */ | |
9bdc770c | 5006 | close_all_fds(except, n_except); |
6bb92a16 LP |
5007 | |
5008 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5009 | stderr_is_tty = isatty(STDERR_FILENO); | |
5010 | ||
5011 | if (!stdout_is_tty || !stderr_is_tty) { | |
5012 | /* Detach from stdout/stderr. and reopen | |
5013 | * /dev/tty for them. This is important to | |
5014 | * ensure that when systemctl is started via | |
5015 | * popen() or a similar call that expects to | |
5016 | * read EOF we actually do generate EOF and | |
5017 | * not delay this indefinitely by because we | |
5018 | * keep an unused copy of stdin around. */ | |
5019 | fd = open("/dev/tty", O_WRONLY); | |
5020 | if (fd < 0) { | |
5021 | log_error("Failed to open /dev/tty: %m"); | |
5022 | _exit(EXIT_FAILURE); | |
5023 | } | |
5024 | ||
5025 | if (!stdout_is_tty) | |
5026 | dup2(fd, STDOUT_FILENO); | |
5027 | ||
5028 | if (!stderr_is_tty) | |
5029 | dup2(fd, STDERR_FILENO); | |
5030 | ||
5031 | if (fd > 2) | |
5032 | close(fd); | |
5033 | } | |
5034 | ||
5035 | /* Count arguments */ | |
5036 | va_start(ap, path); | |
5037 | for (n = 0; va_arg(ap, char*); n++) | |
5038 | ; | |
5039 | va_end(ap); | |
5040 | ||
5041 | /* Allocate strv */ | |
5042 | l = alloca(sizeof(char *) * (n + 1)); | |
5043 | ||
5044 | /* Fill in arguments */ | |
5045 | va_start(ap, path); | |
5046 | for (i = 0; i <= n; i++) | |
5047 | l[i] = va_arg(ap, char*); | |
5048 | va_end(ap); | |
5049 | ||
5050 | execv(path, l); | |
5051 | _exit(EXIT_FAILURE); | |
5052 | } | |
68faf98c LP |
5053 | |
5054 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5055 | struct rlimit highest, fixed; | |
5056 | ||
5057 | assert(rlim); | |
5058 | ||
5059 | if (setrlimit(resource, rlim) >= 0) | |
5060 | return 0; | |
5061 | ||
5062 | if (errno != EPERM) | |
5063 | return -errno; | |
5064 | ||
5065 | /* So we failed to set the desired setrlimit, then let's try | |
5066 | * to get as close as we can */ | |
5067 | assert_se(getrlimit(resource, &highest) == 0); | |
5068 | ||
5069 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5070 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5071 | ||
5072 | if (setrlimit(resource, &fixed) < 0) | |
5073 | return -errno; | |
5074 | ||
5075 | return 0; | |
5076 | } | |
3d9a4122 | 5077 | |
ab94af92 | 5078 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
49aa47c7 LP |
5079 | _cleanup_fclose_ FILE *f = NULL; |
5080 | char *value = NULL; | |
ab94af92 | 5081 | int r; |
ab94af92 LP |
5082 | bool done = false; |
5083 | size_t l; | |
49aa47c7 | 5084 | const char *path; |
ab94af92 | 5085 | |
49aa47c7 | 5086 | assert(pid >= 0); |
ab94af92 LP |
5087 | assert(field); |
5088 | assert(_value); | |
5089 | ||
5090 | if (pid == 0) | |
49aa47c7 LP |
5091 | path = "/proc/self/environ"; |
5092 | else | |
5093 | path = procfs_file_alloca(pid, "environ"); | |
ab94af92 LP |
5094 | |
5095 | f = fopen(path, "re"); | |
5096 | if (!f) | |
5097 | return -errno; | |
5098 | ||
5099 | l = strlen(field); | |
5100 | r = 0; | |
5101 | ||
5102 | do { | |
5103 | char line[LINE_MAX]; | |
5104 | unsigned i; | |
5105 | ||
5106 | for (i = 0; i < sizeof(line)-1; i++) { | |
5107 | int c; | |
5108 | ||
5109 | c = getc(f); | |
5110 | if (_unlikely_(c == EOF)) { | |
5111 | done = true; | |
5112 | break; | |
5113 | } else if (c == 0) | |
5114 | break; | |
5115 | ||
5116 | line[i] = c; | |
5117 | } | |
5118 | line[i] = 0; | |
5119 | ||
5120 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5121 | value = strdup(line + l + 1); | |
49aa47c7 LP |
5122 | if (!value) |
5123 | return -ENOMEM; | |
ab94af92 LP |
5124 | |
5125 | r = 1; | |
5126 | break; | |
5127 | } | |
5128 | ||
5129 | } while (!done); | |
5130 | ||
49aa47c7 | 5131 | *_value = value; |
ab94af92 LP |
5132 | return r; |
5133 | } | |
d889a206 | 5134 | |
49dbfa7b LP |
5135 | bool is_valid_documentation_url(const char *url) { |
5136 | assert(url); | |
5137 | ||
5138 | if (startswith(url, "http://") && url[7]) | |
5139 | return true; | |
5140 | ||
5141 | if (startswith(url, "https://") && url[8]) | |
5142 | return true; | |
5143 | ||
5144 | if (startswith(url, "file:") && url[5]) | |
5145 | return true; | |
5146 | ||
5147 | if (startswith(url, "info:") && url[5]) | |
5148 | return true; | |
5149 | ||
5150 | if (startswith(url, "man:") && url[4]) | |
5151 | return true; | |
5152 | ||
5153 | return false; | |
5154 | } | |
9be346c9 HH |
5155 | |
5156 | bool in_initrd(void) { | |
a05f97b3 | 5157 | static __thread int saved = -1; |
825c6fe5 | 5158 | struct statfs s; |
8f33b5b8 | 5159 | |
825c6fe5 LP |
5160 | if (saved >= 0) |
5161 | return saved; | |
5162 | ||
5163 | /* We make two checks here: | |
5164 | * | |
5165 | * 1. the flag file /etc/initrd-release must exist | |
5166 | * 2. the root file system must be a memory file system | |
5167 | * | |
5168 | * The second check is extra paranoia, since misdetecting an | |
5169 | * initrd can have bad bad consequences due the initrd | |
5170 | * emptying when transititioning to the main systemd. | |
5171 | */ | |
5172 | ||
5173 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5174 | statfs("/", &s) >= 0 && | |
943aad8c | 5175 | is_temporary_fs(&s); |
9be346c9 | 5176 | |
8f33b5b8 | 5177 | return saved; |
9be346c9 | 5178 | } |
069cfc85 LP |
5179 | |
5180 | void warn_melody(void) { | |
e67f47e5 | 5181 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5182 | |
5183 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5184 | if (fd < 0) | |
5185 | return; | |
5186 | ||
040f18ea | 5187 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5188 | |
5189 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5190 | usleep(125*USEC_PER_MSEC); | |
5191 | ||
5192 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5193 | usleep(125*USEC_PER_MSEC); | |
5194 | ||
5195 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5196 | usleep(125*USEC_PER_MSEC); | |
5197 | ||
5198 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5199 | } |
cd3bd60a LP |
5200 | |
5201 | int make_console_stdio(void) { | |
5202 | int fd, r; | |
5203 | ||
5204 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5205 | ||
5206 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5207 | if (fd < 0) { | |
5208 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5209 | return fd; | |
5210 | } | |
5211 | ||
5212 | r = make_stdio(fd); | |
5213 | if (r < 0) { | |
5214 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5215 | return r; | |
5216 | } | |
5217 | ||
5218 | return 0; | |
5219 | } | |
7c5f152a LP |
5220 | |
5221 | int get_home_dir(char **_h) { | |
5222 | char *h; | |
5223 | const char *e; | |
5224 | uid_t u; | |
5225 | struct passwd *p; | |
5226 | ||
5227 | assert(_h); | |
5228 | ||
5229 | /* Take the user specified one */ | |
5230 | e = getenv("HOME"); | |
5231 | if (e) { | |
5232 | h = strdup(e); | |
5233 | if (!h) | |
5234 | return -ENOMEM; | |
5235 | ||
5236 | *_h = h; | |
5237 | return 0; | |
5238 | } | |
5239 | ||
5240 | /* Hardcode home directory for root to avoid NSS */ | |
5241 | u = getuid(); | |
5242 | if (u == 0) { | |
5243 | h = strdup("/root"); | |
5244 | if (!h) | |
5245 | return -ENOMEM; | |
5246 | ||
5247 | *_h = h; | |
5248 | return 0; | |
5249 | } | |
5250 | ||
5251 | /* Check the database... */ | |
5252 | errno = 0; | |
5253 | p = getpwuid(u); | |
5254 | if (!p) | |
bcb161b0 | 5255 | return errno > 0 ? -errno : -ESRCH; |
7c5f152a LP |
5256 | |
5257 | if (!path_is_absolute(p->pw_dir)) | |
5258 | return -EINVAL; | |
5259 | ||
5260 | h = strdup(p->pw_dir); | |
5261 | if (!h) | |
5262 | return -ENOMEM; | |
5263 | ||
5264 | *_h = h; | |
5265 | return 0; | |
5266 | } | |
5267 | ||
0b507b17 LP |
5268 | bool filename_is_safe(const char *p) { |
5269 | ||
5270 | if (isempty(p)) | |
5271 | return false; | |
5272 | ||
5273 | if (strchr(p, '/')) | |
5274 | return false; | |
5275 | ||
5276 | if (streq(p, ".")) | |
5277 | return false; | |
5278 | ||
5279 | if (streq(p, "..")) | |
5280 | return false; | |
5281 | ||
5282 | if (strlen(p) > FILENAME_MAX) | |
5283 | return false; | |
5284 | ||
5285 | return true; | |
5286 | } | |
5287 | ||
5288 | bool string_is_safe(const char *p) { | |
5289 | const char *t; | |
5290 | ||
5291 | assert(p); | |
5292 | ||
5293 | for (t = p; *t; t++) { | |
01539d6e | 5294 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5295 | return false; |
5296 | ||
011afa76 | 5297 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5298 | return false; |
5299 | } | |
5300 | ||
5301 | return true; | |
5302 | } | |
cfbc22ab | 5303 | |
ac4c8d6d ZJS |
5304 | /** |
5305 | * Check if a string contains control characters. | |
5306 | * Spaces and tabs are not considered control characters. | |
5307 | */ | |
4d1a6904 LP |
5308 | bool string_has_cc(const char *p) { |
5309 | const char *t; | |
5310 | ||
5311 | assert(p); | |
5312 | ||
5313 | for (t = p; *t; t++) | |
da2620a5 | 5314 | if (*t > 0 && *t < ' ' && *t != '\t') |
4d1a6904 LP |
5315 | return true; |
5316 | ||
5317 | return false; | |
5318 | } | |
5319 | ||
e884315e LP |
5320 | bool path_is_safe(const char *p) { |
5321 | ||
5322 | if (isempty(p)) | |
5323 | return false; | |
5324 | ||
5325 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5326 | return false; | |
5327 | ||
5328 | if (strlen(p) > PATH_MAX) | |
5329 | return false; | |
5330 | ||
5331 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5332 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5333 | return false; | |
5334 | ||
5335 | if (strstr(p, "//")) | |
5336 | return false; | |
5337 | ||
5338 | return true; | |
5339 | } | |
5340 | ||
a9e12476 KS |
5341 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5342 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5343 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5344 | size_t l, u, idx; |
5345 | const void *p; | |
5346 | int comparison; | |
5347 | ||
5348 | l = 0; | |
5349 | u = nmemb; | |
5350 | while (l < u) { | |
5351 | idx = (l + u) / 2; | |
5352 | p = (void *)(((const char *) base) + (idx * size)); | |
5353 | comparison = compar(key, p, arg); | |
5354 | if (comparison < 0) | |
5355 | u = idx; | |
5356 | else if (comparison > 0) | |
5357 | l = idx + 1; | |
5358 | else | |
5359 | return (void *)p; | |
5360 | } | |
5361 | return NULL; | |
5362 | } | |
09017585 MS |
5363 | |
5364 | bool is_locale_utf8(void) { | |
5365 | const char *set; | |
5366 | static int cached_answer = -1; | |
5367 | ||
5368 | if (cached_answer >= 0) | |
5369 | goto out; | |
5370 | ||
5371 | if (!setlocale(LC_ALL, "")) { | |
5372 | cached_answer = true; | |
5373 | goto out; | |
5374 | } | |
5375 | ||
5376 | set = nl_langinfo(CODESET); | |
5377 | if (!set) { | |
5378 | cached_answer = true; | |
5379 | goto out; | |
5380 | } | |
5381 | ||
fee79e01 HH |
5382 | if(streq(set, "UTF-8")) { |
5383 | cached_answer = true; | |
5384 | goto out; | |
5385 | } | |
5386 | ||
6cf2f1d9 HH |
5387 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
5388 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
5389 | set = setlocale(LC_CTYPE, NULL); |
5390 | if (!set) { | |
5391 | cached_answer = true; | |
5392 | goto out; | |
5393 | } | |
5394 | ||
6cf2f1d9 HH |
5395 | /* Check result, but ignore the result if C was set |
5396 | * explicitly. */ | |
5397 | cached_answer = | |
5398 | streq(set, "C") && | |
5399 | !getenv("LC_ALL") && | |
5400 | !getenv("LC_CTYPE") && | |
5401 | !getenv("LANG"); | |
fee79e01 | 5402 | |
09017585 | 5403 | out: |
6cf2f1d9 | 5404 | return (bool) cached_answer; |
09017585 | 5405 | } |
c339d977 MS |
5406 | |
5407 | const char *draw_special_char(DrawSpecialChar ch) { | |
5408 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
5409 | /* UTF-8 */ { | |
45a5ff0d MS |
5410 | [DRAW_TREE_VERT] = "\342\224\202 ", /* │ */ |
5411 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ | |
5412 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5413 | [DRAW_TREE_SPACE] = " ", /* */ |
45a5ff0d | 5414 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243 ", /* ‣ */ |
3deadb91 | 5415 | [DRAW_BLACK_CIRCLE] = "\342\227\217 ", /* ● */ |
c339d977 MS |
5416 | }, |
5417 | /* ASCII fallback */ { | |
45a5ff0d MS |
5418 | [DRAW_TREE_VERT] = "| ", |
5419 | [DRAW_TREE_BRANCH] = "|-", | |
5420 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5421 | [DRAW_TREE_SPACE] = " ", |
45a5ff0d | 5422 | [DRAW_TRIANGULAR_BULLET] = "> ", |
3deadb91 | 5423 | [DRAW_BLACK_CIRCLE] = "* ", |
c339d977 MS |
5424 | } |
5425 | }; | |
5426 | ||
5427 | return draw_table[!is_locale_utf8()][ch]; | |
5428 | } | |
409bc9c3 LP |
5429 | |
5430 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5431 | const char *f; | |
5432 | char *t, *r; | |
5433 | size_t l, old_len, new_len; | |
5434 | ||
5435 | assert(text); | |
5436 | assert(old_string); | |
5437 | assert(new_string); | |
5438 | ||
5439 | old_len = strlen(old_string); | |
5440 | new_len = strlen(new_string); | |
5441 | ||
5442 | l = strlen(text); | |
5443 | r = new(char, l+1); | |
5444 | if (!r) | |
5445 | return NULL; | |
5446 | ||
5447 | f = text; | |
5448 | t = r; | |
5449 | while (*f) { | |
5450 | char *a; | |
5451 | size_t d, nl; | |
5452 | ||
5453 | if (!startswith(f, old_string)) { | |
5454 | *(t++) = *(f++); | |
5455 | continue; | |
5456 | } | |
5457 | ||
5458 | d = t - r; | |
5459 | nl = l - old_len + new_len; | |
5460 | a = realloc(r, nl + 1); | |
5461 | if (!a) | |
5462 | goto oom; | |
5463 | ||
5464 | l = nl; | |
5465 | r = a; | |
5466 | t = r + d; | |
5467 | ||
5468 | t = stpcpy(t, new_string); | |
5469 | f += old_len; | |
5470 | } | |
5471 | ||
5472 | *t = 0; | |
5473 | return r; | |
5474 | ||
5475 | oom: | |
5476 | free(r); | |
5477 | return NULL; | |
5478 | } | |
e8bc0ea2 LP |
5479 | |
5480 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5481 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5482 | enum { |
5483 | STATE_OTHER, | |
5484 | STATE_ESCAPE, | |
5485 | STATE_BRACKET | |
5486 | } state = STATE_OTHER; | |
5487 | char *obuf = NULL; | |
5488 | size_t osz = 0, isz; | |
5489 | FILE *f; | |
5490 | ||
5491 | assert(ibuf); | |
5492 | assert(*ibuf); | |
5493 | ||
5494 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5495 | ||
5496 | isz = _isz ? *_isz : strlen(*ibuf); | |
5497 | ||
5498 | f = open_memstream(&obuf, &osz); | |
5499 | if (!f) | |
5500 | return NULL; | |
5501 | ||
5502 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5503 | ||
5504 | switch (state) { | |
5505 | ||
5506 | case STATE_OTHER: | |
5507 | if (i >= *ibuf + isz) /* EOT */ | |
5508 | break; | |
5509 | else if (*i == '\x1B') | |
5510 | state = STATE_ESCAPE; | |
5511 | else if (*i == '\t') | |
5512 | fputs(" ", f); | |
5513 | else | |
5514 | fputc(*i, f); | |
5515 | break; | |
5516 | ||
5517 | case STATE_ESCAPE: | |
5518 | if (i >= *ibuf + isz) { /* EOT */ | |
5519 | fputc('\x1B', f); | |
5520 | break; | |
5521 | } else if (*i == '[') { | |
5522 | state = STATE_BRACKET; | |
5523 | begin = i + 1; | |
5524 | } else { | |
5525 | fputc('\x1B', f); | |
5526 | fputc(*i, f); | |
5527 | state = STATE_OTHER; | |
5528 | } | |
5529 | ||
5530 | break; | |
5531 | ||
5532 | case STATE_BRACKET: | |
5533 | ||
5534 | if (i >= *ibuf + isz || /* EOT */ | |
5535 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5536 | fputc('\x1B', f); | |
5537 | fputc('[', f); | |
5538 | state = STATE_OTHER; | |
5539 | i = begin-1; | |
5540 | } else if (*i == 'm') | |
5541 | state = STATE_OTHER; | |
5542 | break; | |
5543 | } | |
5544 | } | |
5545 | ||
5546 | if (ferror(f)) { | |
5547 | fclose(f); | |
5548 | free(obuf); | |
5549 | return NULL; | |
5550 | } | |
5551 | ||
5552 | fclose(f); | |
5553 | ||
5554 | free(*ibuf); | |
5555 | *ibuf = obuf; | |
5556 | ||
5557 | if (_isz) | |
5558 | *_isz = osz; | |
5559 | ||
5560 | return obuf; | |
5561 | } | |
240dbaa4 LP |
5562 | |
5563 | int on_ac_power(void) { | |
5564 | bool found_offline = false, found_online = false; | |
5565 | _cleanup_closedir_ DIR *d = NULL; | |
5566 | ||
5567 | d = opendir("/sys/class/power_supply"); | |
5568 | if (!d) | |
5569 | return -errno; | |
5570 | ||
5571 | for (;;) { | |
5572 | struct dirent *de; | |
5573 | union dirent_storage buf; | |
240dbaa4 LP |
5574 | _cleanup_close_ int fd = -1, device = -1; |
5575 | char contents[6]; | |
5576 | ssize_t n; | |
5577 | int k; | |
5578 | ||
5579 | k = readdir_r(d, &buf.de, &de); | |
5580 | if (k != 0) | |
5581 | return -k; | |
5582 | ||
5583 | if (!de) | |
5584 | break; | |
5585 | ||
5586 | if (ignore_file(de->d_name)) | |
5587 | continue; | |
5588 | ||
5589 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5590 | if (device < 0) { | |
5591 | if (errno == ENOENT || errno == ENOTDIR) | |
5592 | continue; | |
5593 | ||
5594 | return -errno; | |
5595 | } | |
5596 | ||
5597 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5598 | if (fd < 0) { | |
5599 | if (errno == ENOENT) | |
5600 | continue; | |
5601 | ||
5602 | return -errno; | |
5603 | } | |
5604 | ||
5605 | n = read(fd, contents, sizeof(contents)); | |
5606 | if (n < 0) | |
5607 | return -errno; | |
5608 | ||
5609 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5610 | continue; | |
5611 | ||
5612 | close_nointr_nofail(fd); | |
5613 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5614 | if (fd < 0) { | |
5615 | if (errno == ENOENT) | |
5616 | continue; | |
5617 | ||
5618 | return -errno; | |
5619 | } | |
5620 | ||
5621 | n = read(fd, contents, sizeof(contents)); | |
5622 | if (n < 0) | |
5623 | return -errno; | |
5624 | ||
5625 | if (n != 2 || contents[1] != '\n') | |
5626 | return -EIO; | |
5627 | ||
5628 | if (contents[0] == '1') { | |
5629 | found_online = true; | |
5630 | break; | |
5631 | } else if (contents[0] == '0') | |
5632 | found_offline = true; | |
5633 | else | |
5634 | return -EIO; | |
5635 | } | |
5636 | ||
5637 | return found_online || !found_offline; | |
5638 | } | |
fabe5c0e LP |
5639 | |
5640 | static int search_and_fopen_internal(const char *path, const char *mode, char **search, FILE **_f) { | |
5641 | char **i; | |
5642 | ||
5643 | assert(path); | |
5644 | assert(mode); | |
5645 | assert(_f); | |
5646 | ||
5647 | if (!path_strv_canonicalize_uniq(search)) | |
5648 | return -ENOMEM; | |
5649 | ||
5650 | STRV_FOREACH(i, search) { | |
5651 | _cleanup_free_ char *p = NULL; | |
5652 | FILE *f; | |
5653 | ||
5654 | p = strjoin(*i, "/", path, NULL); | |
5655 | if (!p) | |
5656 | return -ENOMEM; | |
5657 | ||
5658 | f = fopen(p, mode); | |
5659 | if (f) { | |
5660 | *_f = f; | |
5661 | return 0; | |
5662 | } | |
5663 | ||
5664 | if (errno != ENOENT) | |
5665 | return -errno; | |
5666 | } | |
5667 | ||
5668 | return -ENOENT; | |
5669 | } | |
5670 | ||
5671 | int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f) { | |
5672 | _cleanup_strv_free_ char **copy = NULL; | |
5673 | ||
5674 | assert(path); | |
5675 | assert(mode); | |
5676 | assert(_f); | |
5677 | ||
5678 | if (path_is_absolute(path)) { | |
5679 | FILE *f; | |
5680 | ||
5681 | f = fopen(path, mode); | |
5682 | if (f) { | |
5683 | *_f = f; | |
5684 | return 0; | |
5685 | } | |
5686 | ||
5687 | return -errno; | |
5688 | } | |
5689 | ||
5690 | copy = strv_copy((char**) search); | |
5691 | if (!copy) | |
5692 | return -ENOMEM; | |
5693 | ||
5694 | return search_and_fopen_internal(path, mode, copy, _f); | |
5695 | } | |
5696 | ||
5697 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f) { | |
5698 | _cleanup_strv_free_ char **s = NULL; | |
5699 | ||
5700 | if (path_is_absolute(path)) { | |
5701 | FILE *f; | |
5702 | ||
5703 | f = fopen(path, mode); | |
5704 | if (f) { | |
5705 | *_f = f; | |
5706 | return 0; | |
5707 | } | |
5708 | ||
5709 | return -errno; | |
5710 | } | |
5711 | ||
5712 | s = strv_split_nulstr(search); | |
5713 | if (!s) | |
5714 | return -ENOMEM; | |
5715 | ||
5716 | return search_and_fopen_internal(path, mode, s, _f); | |
5717 | } | |
c17ec25e | 5718 | |
66e35261 LP |
5719 | char *strextend(char **x, ...) { |
5720 | va_list ap; | |
5721 | size_t f, l; | |
5722 | char *r, *p; | |
5723 | ||
5724 | assert(x); | |
5725 | ||
5726 | l = f = *x ? strlen(*x) : 0; | |
5727 | ||
5728 | va_start(ap, x); | |
5729 | for (;;) { | |
5730 | const char *t; | |
5731 | size_t n; | |
5732 | ||
5733 | t = va_arg(ap, const char *); | |
5734 | if (!t) | |
5735 | break; | |
5736 | ||
5737 | n = strlen(t); | |
5738 | if (n > ((size_t) -1) - l) { | |
5739 | va_end(ap); | |
5740 | return NULL; | |
5741 | } | |
5742 | ||
5743 | l += n; | |
5744 | } | |
5745 | va_end(ap); | |
5746 | ||
5747 | r = realloc(*x, l+1); | |
5748 | if (!r) | |
5749 | return NULL; | |
5750 | ||
5751 | p = r + f; | |
5752 | ||
5753 | va_start(ap, x); | |
5754 | for (;;) { | |
5755 | const char *t; | |
5756 | ||
5757 | t = va_arg(ap, const char *); | |
5758 | if (!t) | |
5759 | break; | |
5760 | ||
5761 | p = stpcpy(p, t); | |
5762 | } | |
5763 | va_end(ap); | |
5764 | ||
5765 | *p = 0; | |
5766 | *x = r; | |
5767 | ||
5768 | return r + l; | |
5769 | } | |
9a17484d LP |
5770 | |
5771 | char *strrep(const char *s, unsigned n) { | |
5772 | size_t l; | |
5773 | char *r, *p; | |
5774 | unsigned i; | |
5775 | ||
5776 | assert(s); | |
5777 | ||
5778 | l = strlen(s); | |
5779 | p = r = malloc(l * n + 1); | |
5780 | if (!r) | |
5781 | return NULL; | |
5782 | ||
5783 | for (i = 0; i < n; i++) | |
5784 | p = stpcpy(p, s); | |
5785 | ||
5786 | *p = 0; | |
5787 | return r; | |
5788 | } | |
392d5b37 LP |
5789 | |
5790 | void* greedy_realloc(void **p, size_t *allocated, size_t need) { | |
5791 | size_t a; | |
5792 | void *q; | |
5793 | ||
e93c33d4 SL |
5794 | assert(allocated); |
5795 | ||
392d5b37 LP |
5796 | if (*allocated >= need) |
5797 | return *p; | |
5798 | ||
9607d947 | 5799 | a = MAX(64u, need * 2); |
392d5b37 LP |
5800 | q = realloc(*p, a); |
5801 | if (!q) | |
5802 | return NULL; | |
5803 | ||
5804 | *p = q; | |
5805 | *allocated = a; | |
5806 | return q; | |
5807 | } | |
aa96c6cb | 5808 | |
4545a231 DH |
5809 | void* greedy_realloc0(void **p, size_t *allocated, size_t need) { |
5810 | size_t prev = *allocated; | |
5811 | uint8_t *q; | |
5812 | ||
5813 | q = greedy_realloc(p, allocated, need); | |
5814 | if (!q) | |
5815 | return NULL; | |
5816 | ||
5817 | if (*allocated > prev) | |
5818 | memset(&q[prev], 0, *allocated - prev); | |
5819 | ||
5820 | return q; | |
5821 | } | |
5822 | ||
aa96c6cb LP |
5823 | bool id128_is_valid(const char *s) { |
5824 | size_t i, l; | |
5825 | ||
5826 | l = strlen(s); | |
5827 | if (l == 32) { | |
5828 | ||
5829 | /* Simple formatted 128bit hex string */ | |
5830 | ||
5831 | for (i = 0; i < l; i++) { | |
5832 | char c = s[i]; | |
5833 | ||
5834 | if (!(c >= '0' && c <= '9') && | |
5835 | !(c >= 'a' && c <= 'z') && | |
5836 | !(c >= 'A' && c <= 'Z')) | |
5837 | return false; | |
5838 | } | |
5839 | ||
5840 | } else if (l == 36) { | |
5841 | ||
5842 | /* Formatted UUID */ | |
5843 | ||
5844 | for (i = 0; i < l; i++) { | |
5845 | char c = s[i]; | |
5846 | ||
5847 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
5848 | if (c != '-') | |
5849 | return false; | |
5850 | } else { | |
5851 | if (!(c >= '0' && c <= '9') && | |
5852 | !(c >= 'a' && c <= 'z') && | |
5853 | !(c >= 'A' && c <= 'Z')) | |
5854 | return false; | |
5855 | } | |
5856 | } | |
5857 | ||
5858 | } else | |
5859 | return false; | |
5860 | ||
5861 | return true; | |
5862 | } | |
7085053a DW |
5863 | |
5864 | void parse_user_at_host(char *arg, char **user, char **host) { | |
5865 | assert(arg); | |
5866 | assert(user); | |
5867 | assert(host); | |
5868 | ||
5869 | *host = strchr(arg, '@'); | |
5870 | if (*host == NULL) | |
5871 | *host = arg; | |
5872 | else { | |
5873 | *host[0]++ = '\0'; | |
5874 | *user = arg; | |
5875 | } | |
5876 | } | |
d4ac85c6 LP |
5877 | |
5878 | int split_pair(const char *s, const char *sep, char **l, char **r) { | |
5879 | char *x, *a, *b; | |
5880 | ||
5881 | assert(s); | |
5882 | assert(sep); | |
5883 | assert(l); | |
5884 | assert(r); | |
5885 | ||
5886 | if (isempty(sep)) | |
5887 | return -EINVAL; | |
5888 | ||
5889 | x = strstr(s, sep); | |
5890 | if (!x) | |
5891 | return -EINVAL; | |
5892 | ||
5893 | a = strndup(s, x - s); | |
5894 | if (!a) | |
5895 | return -ENOMEM; | |
5896 | ||
5897 | b = strdup(x + strlen(sep)); | |
5898 | if (!b) { | |
5899 | free(a); | |
5900 | return -ENOMEM; | |
5901 | } | |
5902 | ||
5903 | *l = a; | |
5904 | *r = b; | |
5905 | ||
5906 | return 0; | |
5907 | } | |
295edddf | 5908 | |
74df0fca | 5909 | int shall_restore_state(void) { |
295edddf TG |
5910 | _cleanup_free_ char *line; |
5911 | char *w, *state; | |
295edddf | 5912 | size_t l; |
74df0fca | 5913 | int r; |
295edddf | 5914 | |
74df0fca LP |
5915 | r = proc_cmdline(&line); |
5916 | if (r < 0) | |
5917 | return r; | |
5918 | if (r == 0) /* Container ... */ | |
5919 | return 1; | |
295edddf | 5920 | |
74df0fca LP |
5921 | FOREACH_WORD_QUOTED(w, l, line, state) |
5922 | if (l == 23 && memcmp(w, "systemd.restore_state=0", 23)) | |
5923 | return 0; | |
5924 | ||
5925 | return 1; | |
5926 | } | |
5927 | ||
5928 | int proc_cmdline(char **ret) { | |
5929 | int r; | |
5930 | ||
5931 | if (detect_container(NULL) > 0) { | |
5932 | *ret = NULL; | |
5933 | return 0; | |
295edddf TG |
5934 | } |
5935 | ||
74df0fca LP |
5936 | r = read_one_line_file("/proc/cmdline", ret); |
5937 | if (r < 0) | |
5938 | return r; | |
295edddf | 5939 | |
74df0fca | 5940 | return 1; |
295edddf | 5941 | } |