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