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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> | |
6afc95b7 | 61 | #include <sys/personality.h> |
844ec79b | 62 | #include <libgen.h> |
2b6bf07d | 63 | #undef basename |
60918275 | 64 | |
9bf3b535 LP |
65 | #ifdef HAVE_SYS_AUXV_H |
66 | #include <sys/auxv.h> | |
67 | #endif | |
68 | ||
60918275 LP |
69 | #include "macro.h" |
70 | #include "util.h" | |
1dccbe19 LP |
71 | #include "ioprio.h" |
72 | #include "missing.h" | |
a9f5d454 | 73 | #include "log.h" |
65d2ebdc | 74 | #include "strv.h" |
e51bc1a2 | 75 | #include "label.h" |
9eb977db | 76 | #include "path-util.h" |
d06dacd0 | 77 | #include "exit-status.h" |
83cc030f | 78 | #include "hashmap.h" |
4d1a6904 | 79 | #include "env-util.h" |
a5c32cff | 80 | #include "fileio.h" |
8f6ce71f | 81 | #include "device-nodes.h" |
f405e86d SL |
82 | #include "utf8.h" |
83 | #include "gunicode.h" | |
295edddf | 84 | #include "virt.h" |
477def80 | 85 | #include "def.h" |
517d56b1 | 86 | #include "missing.h" |
56cf987f | 87 | |
9a0e6896 LP |
88 | int saved_argc = 0; |
89 | char **saved_argv = NULL; | |
9086e840 | 90 | |
28917d7d | 91 | static volatile unsigned cached_columns = 0; |
ed757c0c | 92 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 93 | |
37f85e66 | 94 | size_t page_size(void) { |
ec202eae | 95 | static thread_local size_t pgsz = 0; |
37f85e66 | 96 | long r; |
97 | ||
87d2c1ff | 98 | if (_likely_(pgsz > 0)) |
37f85e66 | 99 | return pgsz; |
100 | ||
e67f47e5 LP |
101 | r = sysconf(_SC_PAGESIZE); |
102 | assert(r > 0); | |
37f85e66 | 103 | |
104 | pgsz = (size_t) r; | |
37f85e66 | 105 | return pgsz; |
106 | } | |
107 | ||
e05797fb LP |
108 | bool streq_ptr(const char *a, const char *b) { |
109 | ||
110 | /* Like streq(), but tries to make sense of NULL pointers */ | |
111 | ||
112 | if (a && b) | |
113 | return streq(a, b); | |
114 | ||
115 | if (!a && !b) | |
116 | return true; | |
117 | ||
118 | return false; | |
119 | } | |
120 | ||
8c7c140f | 121 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
122 | size_t sl, pl; |
123 | ||
124 | assert(s); | |
125 | assert(postfix); | |
126 | ||
127 | sl = strlen(s); | |
128 | pl = strlen(postfix); | |
129 | ||
d4d0d4db | 130 | if (pl == 0) |
8c7c140f | 131 | return (char*) s + sl; |
d4d0d4db | 132 | |
60918275 | 133 | if (sl < pl) |
8c7c140f LP |
134 | return NULL; |
135 | ||
136 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
137 | return NULL; | |
60918275 | 138 | |
8c7c140f | 139 | return (char*) s + sl - pl; |
60918275 LP |
140 | } |
141 | ||
79d6d816 LP |
142 | bool first_word(const char *s, const char *word) { |
143 | size_t sl, wl; | |
144 | ||
145 | assert(s); | |
146 | assert(word); | |
147 | ||
148 | sl = strlen(s); | |
149 | wl = strlen(word); | |
150 | ||
151 | if (sl < wl) | |
152 | return false; | |
153 | ||
d4d0d4db LP |
154 | if (wl == 0) |
155 | return true; | |
156 | ||
79d6d816 LP |
157 | if (memcmp(s, word, wl) != 0) |
158 | return false; | |
159 | ||
d4d0d4db LP |
160 | return s[wl] == 0 || |
161 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
162 | } |
163 | ||
42f4e3c4 | 164 | int close_nointr(int fd) { |
b0ee8068 | 165 | int r; |
60918275 | 166 | |
b0ee8068 CW |
167 | assert(fd >= 0); |
168 | r = close(fd); | |
169 | ||
170 | /* Just ignore EINTR; a retry loop is the wrong | |
171 | * thing to do on Linux. | |
172 | * | |
173 | * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html | |
174 | * https://bugzilla.gnome.org/show_bug.cgi?id=682819 | |
175 | * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR | |
176 | * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain | |
177 | */ | |
178 | if (_unlikely_(r < 0 && errno == EINTR)) | |
179 | return 0; | |
180 | else if (r >= 0) | |
181 | return r; | |
182 | else | |
183 | return -errno; | |
60918275 | 184 | } |
85261803 | 185 | |
85f136b5 | 186 | void close_nointr_nofail(int fd) { |
5c0aa72a | 187 | PROTECT_ERRNO; |
85f136b5 LP |
188 | |
189 | /* like close_nointr() but cannot fail, and guarantees errno | |
190 | * is unchanged */ | |
191 | ||
192 | assert_se(close_nointr(fd) == 0); | |
193 | } | |
194 | ||
5b6319dc LP |
195 | void close_many(const int fds[], unsigned n_fd) { |
196 | unsigned i; | |
197 | ||
2c93b4ef LP |
198 | assert(fds || n_fd <= 0); |
199 | ||
5b6319dc LP |
200 | for (i = 0; i < n_fd; i++) |
201 | close_nointr_nofail(fds[i]); | |
202 | } | |
203 | ||
4b73a0c0 LP |
204 | int unlink_noerrno(const char *path) { |
205 | PROTECT_ERRNO; | |
206 | int r; | |
207 | ||
208 | r = unlink(path); | |
209 | if (r < 0) | |
210 | return -errno; | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
85261803 LP |
215 | int parse_boolean(const char *v) { |
216 | assert(v); | |
217 | ||
b43d1d01 | 218 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || strcaseeq(v, "on")) |
85261803 | 219 | return 1; |
b43d1d01 | 220 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || strcaseeq(v, "off")) |
85261803 LP |
221 | return 0; |
222 | ||
223 | return -EINVAL; | |
224 | } | |
225 | ||
3ba686c1 | 226 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 227 | unsigned long ul = 0; |
3ba686c1 LP |
228 | pid_t pid; |
229 | int r; | |
230 | ||
231 | assert(s); | |
232 | assert(ret_pid); | |
233 | ||
e67f47e5 LP |
234 | r = safe_atolu(s, &ul); |
235 | if (r < 0) | |
3ba686c1 LP |
236 | return r; |
237 | ||
238 | pid = (pid_t) ul; | |
239 | ||
240 | if ((unsigned long) pid != ul) | |
241 | return -ERANGE; | |
242 | ||
243 | if (pid <= 0) | |
244 | return -ERANGE; | |
245 | ||
246 | *ret_pid = pid; | |
247 | return 0; | |
248 | } | |
249 | ||
034a2a52 LP |
250 | int parse_uid(const char *s, uid_t* ret_uid) { |
251 | unsigned long ul = 0; | |
252 | uid_t uid; | |
253 | int r; | |
254 | ||
255 | assert(s); | |
256 | assert(ret_uid); | |
257 | ||
e67f47e5 LP |
258 | r = safe_atolu(s, &ul); |
259 | if (r < 0) | |
034a2a52 LP |
260 | return r; |
261 | ||
262 | uid = (uid_t) ul; | |
263 | ||
264 | if ((unsigned long) uid != ul) | |
265 | return -ERANGE; | |
266 | ||
267 | *ret_uid = uid; | |
268 | return 0; | |
269 | } | |
270 | ||
85261803 LP |
271 | int safe_atou(const char *s, unsigned *ret_u) { |
272 | char *x = NULL; | |
034c6ed7 | 273 | unsigned long l; |
85261803 LP |
274 | |
275 | assert(s); | |
276 | assert(ret_u); | |
277 | ||
278 | errno = 0; | |
279 | l = strtoul(s, &x, 0); | |
280 | ||
f3910003 | 281 | if (!x || x == s || *x || errno) |
48deb058 | 282 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 283 | |
034c6ed7 | 284 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
285 | return -ERANGE; |
286 | ||
287 | *ret_u = (unsigned) l; | |
288 | return 0; | |
289 | } | |
290 | ||
291 | int safe_atoi(const char *s, int *ret_i) { | |
292 | char *x = NULL; | |
034c6ed7 | 293 | long l; |
85261803 LP |
294 | |
295 | assert(s); | |
296 | assert(ret_i); | |
297 | ||
298 | errno = 0; | |
299 | l = strtol(s, &x, 0); | |
300 | ||
f3910003 | 301 | if (!x || x == s || *x || errno) |
48deb058 | 302 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 303 | |
034c6ed7 | 304 | if ((long) (int) l != l) |
85261803 LP |
305 | return -ERANGE; |
306 | ||
034c6ed7 LP |
307 | *ret_i = (int) l; |
308 | return 0; | |
309 | } | |
310 | ||
034c6ed7 LP |
311 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
312 | char *x = NULL; | |
313 | unsigned long long l; | |
314 | ||
315 | assert(s); | |
316 | assert(ret_llu); | |
317 | ||
318 | errno = 0; | |
319 | l = strtoull(s, &x, 0); | |
320 | ||
f3910003 | 321 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
322 | return errno ? -errno : -EINVAL; |
323 | ||
324 | *ret_llu = l; | |
325 | return 0; | |
326 | } | |
327 | ||
328 | int safe_atolli(const char *s, long long int *ret_lli) { | |
329 | char *x = NULL; | |
330 | long long l; | |
331 | ||
332 | assert(s); | |
333 | assert(ret_lli); | |
334 | ||
335 | errno = 0; | |
336 | l = strtoll(s, &x, 0); | |
337 | ||
f3910003 | 338 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
339 | return errno ? -errno : -EINVAL; |
340 | ||
341 | *ret_lli = l; | |
85261803 LP |
342 | return 0; |
343 | } | |
a41e8209 | 344 | |
f7900e25 TA |
345 | int safe_atod(const char *s, double *ret_d) { |
346 | char *x = NULL; | |
32b2634e | 347 | double d = 0; |
f7900e25 TA |
348 | |
349 | assert(s); | |
350 | assert(ret_d); | |
351 | ||
d6dd604b LP |
352 | RUN_WITH_LOCALE(LC_NUMERIC_MASK, "C") { |
353 | errno = 0; | |
354 | d = strtod(s, &x); | |
355 | } | |
f7900e25 TA |
356 | |
357 | if (!x || x == s || *x || errno) | |
358 | return errno ? -errno : -EINVAL; | |
359 | ||
360 | *ret_d = (double) d; | |
361 | return 0; | |
362 | } | |
363 | ||
bf85c24d SP |
364 | static size_t strcspn_escaped(const char *s, const char *reject) { |
365 | bool escaped = false; | |
366 | size_t n; | |
367 | ||
368 | for (n=0; s[n]; n++) { | |
369 | if (escaped) | |
370 | escaped = false; | |
371 | else if (s[n] == '\\') | |
372 | escaped = true; | |
373 | else if (strchr(reject, s[n])) | |
374 | return n; | |
375 | } | |
376 | return n; | |
377 | } | |
378 | ||
a41e8209 | 379 | /* Split a string into words. */ |
bf85c24d | 380 | char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state) { |
a41e8209 LP |
381 | char *current; |
382 | ||
383 | current = *state ? *state : (char*) c; | |
384 | ||
385 | if (!*current || *c == 0) | |
386 | return NULL; | |
387 | ||
65d2ebdc | 388 | current += strspn(current, separator); |
bf85c24d | 389 | if (!*current) |
70f75a52 LP |
390 | return NULL; |
391 | ||
bf85c24d SP |
392 | if (quoted && strchr("\'\"", *current)) { |
393 | char quotechar = *(current++); | |
394 | *l = strcspn_escaped(current, (char[]){quotechar, '\0'}); | |
395 | *state = current+*l+1; | |
396 | } else if (quoted) { | |
397 | *l = strcspn_escaped(current, separator); | |
398 | *state = current+*l; | |
034c6ed7 | 399 | } else { |
bf85c24d SP |
400 | *l = strcspn(current, separator); |
401 | *state = current+*l; | |
034c6ed7 LP |
402 | } |
403 | ||
5b12334d | 404 | return (char*) current; |
034c6ed7 LP |
405 | } |
406 | ||
034c6ed7 LP |
407 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
408 | int r; | |
b4696bce | 409 | _cleanup_free_ char *line = NULL; |
bb00e604 | 410 | long unsigned ppid; |
49aa47c7 | 411 | const char *p; |
034c6ed7 | 412 | |
49aa47c7 | 413 | assert(pid >= 0); |
034c6ed7 LP |
414 | assert(_ppid); |
415 | ||
49aa47c7 LP |
416 | if (pid == 0) { |
417 | *_ppid = getppid(); | |
418 | return 0; | |
419 | } | |
034c6ed7 | 420 | |
49aa47c7 | 421 | p = procfs_file_alloca(pid, "stat"); |
b4696bce SP |
422 | r = read_one_line_file(p, &line); |
423 | if (r < 0) | |
034c6ed7 | 424 | return r; |
034c6ed7 | 425 | |
034c6ed7 LP |
426 | /* Let's skip the pid and comm fields. The latter is enclosed |
427 | * in () but does not escape any () in its value, so let's | |
428 | * skip over it manually */ | |
429 | ||
2fbe635a LP |
430 | p = strrchr(line, ')'); |
431 | if (!p) | |
034c6ed7 LP |
432 | return -EIO; |
433 | ||
434 | p++; | |
435 | ||
436 | if (sscanf(p, " " | |
437 | "%*c " /* state */ | |
bb00e604 | 438 | "%lu ", /* ppid */ |
034c6ed7 LP |
439 | &ppid) != 1) |
440 | return -EIO; | |
441 | ||
bb00e604 | 442 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
443 | return -ERANGE; |
444 | ||
445 | *_ppid = (pid_t) ppid; | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
7640a5de | 450 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
b4696bce SP |
451 | int r; |
452 | _cleanup_free_ char *line = NULL; | |
49aa47c7 | 453 | const char *p; |
7640a5de | 454 | |
49aa47c7 | 455 | assert(pid >= 0); |
7640a5de LP |
456 | assert(st); |
457 | ||
b68fa010 | 458 | p = procfs_file_alloca(pid, "stat"); |
b4696bce SP |
459 | r = read_one_line_file(p, &line); |
460 | if (r < 0) | |
461 | return r; | |
7640a5de LP |
462 | |
463 | /* Let's skip the pid and comm fields. The latter is enclosed | |
464 | * in () but does not escape any () in its value, so let's | |
465 | * skip over it manually */ | |
466 | ||
e67f47e5 LP |
467 | p = strrchr(line, ')'); |
468 | if (!p) | |
7640a5de LP |
469 | return -EIO; |
470 | ||
471 | p++; | |
472 | ||
473 | if (sscanf(p, " " | |
474 | "%*c " /* state */ | |
475 | "%*d " /* ppid */ | |
476 | "%*d " /* pgrp */ | |
477 | "%*d " /* session */ | |
478 | "%*d " /* tty_nr */ | |
479 | "%*d " /* tpgid */ | |
480 | "%*u " /* flags */ | |
481 | "%*u " /* minflt */ | |
482 | "%*u " /* cminflt */ | |
483 | "%*u " /* majflt */ | |
484 | "%*u " /* cmajflt */ | |
485 | "%*u " /* utime */ | |
486 | "%*u " /* stime */ | |
487 | "%*d " /* cutime */ | |
488 | "%*d " /* cstime */ | |
489 | "%*d " /* priority */ | |
490 | "%*d " /* nice */ | |
491 | "%*d " /* num_threads */ | |
492 | "%*d " /* itrealvalue */ | |
493 | "%llu " /* starttime */, | |
494 | st) != 1) | |
495 | return -EIO; | |
496 | ||
497 | return 0; | |
498 | } | |
499 | ||
34ca941c LP |
500 | int fchmod_umask(int fd, mode_t m) { |
501 | mode_t u; | |
502 | int r; | |
503 | ||
504 | u = umask(0777); | |
505 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
506 | umask(u); | |
507 | ||
508 | return r; | |
509 | } | |
510 | ||
7072ced8 LP |
511 | char *truncate_nl(char *s) { |
512 | assert(s); | |
513 | ||
514 | s[strcspn(s, NEWLINE)] = 0; | |
515 | return s; | |
516 | } | |
517 | ||
93b5eaec | 518 | int get_process_state(pid_t pid) { |
e10c9985 YS |
519 | const char *p; |
520 | char state; | |
521 | int r; | |
522 | _cleanup_free_ char *line = NULL; | |
523 | ||
524 | assert(pid >= 0); | |
525 | ||
526 | p = procfs_file_alloca(pid, "stat"); | |
527 | r = read_one_line_file(p, &line); | |
528 | if (r < 0) | |
529 | return r; | |
530 | ||
531 | p = strrchr(line, ')'); | |
532 | if (!p) | |
533 | return -EIO; | |
534 | ||
535 | p++; | |
536 | ||
537 | if (sscanf(p, " %c", &state) != 1) | |
538 | return -EIO; | |
539 | ||
540 | return (unsigned char) state; | |
541 | } | |
542 | ||
87d2c1ff | 543 | int get_process_comm(pid_t pid, char **name) { |
49aa47c7 | 544 | const char *p; |
5b12334d | 545 | int r; |
7072ced8 | 546 | |
7072ced8 | 547 | assert(name); |
49aa47c7 | 548 | assert(pid >= 0); |
7072ced8 | 549 | |
b68fa010 | 550 | p = procfs_file_alloca(pid, "comm"); |
7072ced8 | 551 | |
5b12334d LP |
552 | r = read_one_line_file(p, name); |
553 | if (r == -ENOENT) | |
554 | return -ESRCH; | |
555 | ||
556 | return r; | |
7072ced8 LP |
557 | } |
558 | ||
87d2c1ff | 559 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
49aa47c7 | 560 | _cleanup_fclose_ FILE *f = NULL; |
9bdbc2e2 | 561 | char *r = NULL, *k; |
49aa47c7 | 562 | const char *p; |
c59760ee | 563 | int c; |
c59760ee | 564 | |
c59760ee | 565 | assert(line); |
49aa47c7 | 566 | assert(pid >= 0); |
c59760ee | 567 | |
b68fa010 | 568 | p = procfs_file_alloca(pid, "cmdline"); |
c59760ee | 569 | |
49aa47c7 | 570 | f = fopen(p, "re"); |
c59760ee LP |
571 | if (!f) |
572 | return -errno; | |
49aa47c7 | 573 | |
9bdbc2e2 | 574 | if (max_length == 0) { |
49aa47c7 LP |
575 | size_t len = 0, allocated = 0; |
576 | ||
9bdbc2e2 | 577 | while ((c = getc(f)) != EOF) { |
49aa47c7 LP |
578 | |
579 | if (!GREEDY_REALLOC(r, allocated, len+2)) { | |
9bdbc2e2 | 580 | free(r); |
9bdbc2e2 LN |
581 | return -ENOMEM; |
582 | } | |
49aa47c7 LP |
583 | |
584 | r[len++] = isprint(c) ? c : ' '; | |
9bdbc2e2 | 585 | } |
49aa47c7 LP |
586 | |
587 | if (len > 0) | |
588 | r[len-1] = 0; | |
589 | ||
9bdbc2e2 LN |
590 | } else { |
591 | bool space = false; | |
592 | size_t left; | |
49aa47c7 | 593 | |
9bdbc2e2 | 594 | r = new(char, max_length); |
49aa47c7 | 595 | if (!r) |
9bdbc2e2 | 596 | return -ENOMEM; |
c59760ee | 597 | |
9bdbc2e2 LN |
598 | k = r; |
599 | left = max_length; | |
600 | while ((c = getc(f)) != EOF) { | |
c59760ee | 601 | |
9bdbc2e2 LN |
602 | if (isprint(c)) { |
603 | if (space) { | |
604 | if (left <= 4) | |
605 | break; | |
606 | ||
607 | *(k++) = ' '; | |
608 | left--; | |
609 | space = false; | |
610 | } | |
c59760ee | 611 | |
c59760ee LP |
612 | if (left <= 4) |
613 | break; | |
614 | ||
9bdbc2e2 | 615 | *(k++) = (char) c; |
057fbb58 | 616 | left--; |
9bdbc2e2 LN |
617 | } else |
618 | space = true; | |
619 | } | |
c59760ee | 620 | |
9bdbc2e2 LN |
621 | if (left <= 4) { |
622 | size_t n = MIN(left-1, 3U); | |
623 | memcpy(k, "...", n); | |
624 | k[n] = 0; | |
625 | } else | |
626 | *k = 0; | |
c59760ee LP |
627 | } |
628 | ||
35d2e7ec | 629 | /* Kernel threads have no argv[] */ |
9bdbc2e2 | 630 | if (r == NULL || r[0] == 0) { |
b47d419c | 631 | _cleanup_free_ char *t = NULL; |
35d2e7ec LP |
632 | int h; |
633 | ||
634 | free(r); | |
635 | ||
87d2c1ff LP |
636 | if (!comm_fallback) |
637 | return -ENOENT; | |
638 | ||
639 | h = get_process_comm(pid, &t); | |
640 | if (h < 0) | |
35d2e7ec LP |
641 | return h; |
642 | ||
b7def684 | 643 | r = strjoin("[", t, "]", NULL); |
87d2c1ff | 644 | if (!r) |
35d2e7ec LP |
645 | return -ENOMEM; |
646 | } | |
fa776d8e | 647 | |
c59760ee LP |
648 | *line = r; |
649 | return 0; | |
650 | } | |
651 | ||
1e5678d0 | 652 | int is_kernel_thread(pid_t pid) { |
49aa47c7 | 653 | const char *p; |
1e5678d0 LP |
654 | size_t count; |
655 | char c; | |
656 | bool eof; | |
657 | FILE *f; | |
658 | ||
659 | if (pid == 0) | |
660 | return 0; | |
661 | ||
49aa47c7 | 662 | assert(pid > 0); |
1e5678d0 | 663 | |
49aa47c7 LP |
664 | p = procfs_file_alloca(pid, "cmdline"); |
665 | f = fopen(p, "re"); | |
1e5678d0 LP |
666 | if (!f) |
667 | return -errno; | |
668 | ||
669 | count = fread(&c, 1, 1, f); | |
670 | eof = feof(f); | |
671 | fclose(f); | |
672 | ||
673 | /* Kernel threads have an empty cmdline */ | |
674 | ||
675 | if (count <= 0) | |
676 | return eof ? 1 : -errno; | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
3a832116 SL |
681 | int get_process_capeff(pid_t pid, char **capeff) { |
682 | const char *p; | |
3a832116 SL |
683 | |
684 | assert(capeff); | |
685 | assert(pid >= 0); | |
686 | ||
b68fa010 | 687 | p = procfs_file_alloca(pid, "status"); |
3a832116 | 688 | |
69ab8088 | 689 | return get_status_field(p, "\nCapEff:", capeff); |
3a832116 | 690 | } |
49aa47c7 | 691 | |
87d2c1ff | 692 | int get_process_exe(pid_t pid, char **name) { |
49aa47c7 | 693 | const char *p; |
e79f68d1 ZJS |
694 | char *d; |
695 | int r; | |
87d2c1ff | 696 | |
49aa47c7 | 697 | assert(pid >= 0); |
87d2c1ff LP |
698 | assert(name); |
699 | ||
b68fa010 | 700 | p = procfs_file_alloca(pid, "exe"); |
87d2c1ff | 701 | |
e79f68d1 ZJS |
702 | r = readlink_malloc(p, name); |
703 | if (r < 0) | |
5b12334d | 704 | return r == -ENOENT ? -ESRCH : r; |
e79f68d1 ZJS |
705 | |
706 | d = endswith(*name, " (deleted)"); | |
707 | if (d) | |
708 | *d = '\0'; | |
709 | ||
710 | return 0; | |
87d2c1ff LP |
711 | } |
712 | ||
901c3d0d | 713 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
f74e605f | 714 | _cleanup_fclose_ FILE *f = NULL; |
9db11a99 | 715 | char line[LINE_MAX]; |
49aa47c7 | 716 | const char *p; |
7e4ab3c5 | 717 | |
f74e605f | 718 | assert(field); |
7e4ab3c5 LP |
719 | assert(uid); |
720 | ||
721 | if (pid == 0) | |
722 | return getuid(); | |
723 | ||
49aa47c7 LP |
724 | p = procfs_file_alloca(pid, "status"); |
725 | f = fopen(p, "re"); | |
7e4ab3c5 LP |
726 | if (!f) |
727 | return -errno; | |
728 | ||
9db11a99 | 729 | FOREACH_LINE(line, f, return -errno) { |
f74e605f | 730 | char *l; |
7e4ab3c5 LP |
731 | |
732 | l = strstrip(line); | |
733 | ||
901c3d0d LP |
734 | if (startswith(l, field)) { |
735 | l += strlen(field); | |
7e4ab3c5 LP |
736 | l += strspn(l, WHITESPACE); |
737 | ||
738 | l[strcspn(l, WHITESPACE)] = 0; | |
739 | ||
f74e605f | 740 | return parse_uid(l, uid); |
7e4ab3c5 LP |
741 | } |
742 | } | |
743 | ||
f74e605f | 744 | return -EIO; |
7e4ab3c5 LP |
745 | } |
746 | ||
901c3d0d LP |
747 | int get_process_uid(pid_t pid, uid_t *uid) { |
748 | return get_process_id(pid, "Uid:", uid); | |
749 | } | |
750 | ||
751 | int get_process_gid(pid_t pid, gid_t *gid) { | |
49aa47c7 | 752 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); |
901c3d0d LP |
753 | return get_process_id(pid, "Gid:", gid); |
754 | } | |
755 | ||
fab56fc5 LP |
756 | char *strnappend(const char *s, const char *suffix, size_t b) { |
757 | size_t a; | |
44d8db9e LP |
758 | char *r; |
759 | ||
fab56fc5 LP |
760 | if (!s && !suffix) |
761 | return strdup(""); | |
762 | ||
763 | if (!s) | |
764 | return strndup(suffix, b); | |
765 | ||
766 | if (!suffix) | |
767 | return strdup(s); | |
768 | ||
44d8db9e LP |
769 | assert(s); |
770 | assert(suffix); | |
771 | ||
772 | a = strlen(s); | |
aa408e77 | 773 | if (b > ((size_t) -1) - a) |
040f18ea | 774 | return NULL; |
44d8db9e | 775 | |
040f18ea LP |
776 | r = new(char, a+b+1); |
777 | if (!r) | |
44d8db9e LP |
778 | return NULL; |
779 | ||
780 | memcpy(r, s, a); | |
781 | memcpy(r+a, suffix, b); | |
782 | r[a+b] = 0; | |
783 | ||
784 | return r; | |
785 | } | |
87f0e418 | 786 | |
fab56fc5 LP |
787 | char *strappend(const char *s, const char *suffix) { |
788 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
789 | } | |
790 | ||
2d2ebd6b | 791 | int readlink_malloc(const char *p, char **ret) { |
87f0e418 | 792 | size_t l = 100; |
2d2ebd6b | 793 | int r; |
87f0e418 LP |
794 | |
795 | assert(p); | |
2d2ebd6b | 796 | assert(ret); |
87f0e418 LP |
797 | |
798 | for (;;) { | |
799 | char *c; | |
800 | ssize_t n; | |
801 | ||
2d2ebd6b LP |
802 | c = new(char, l); |
803 | if (!c) | |
87f0e418 LP |
804 | return -ENOMEM; |
805 | ||
2d2ebd6b LP |
806 | n = readlink(p, c, l-1); |
807 | if (n < 0) { | |
808 | r = -errno; | |
87f0e418 | 809 | free(c); |
2d2ebd6b | 810 | return r; |
87f0e418 LP |
811 | } |
812 | ||
813 | if ((size_t) n < l-1) { | |
814 | c[n] = 0; | |
2d2ebd6b | 815 | *ret = c; |
87f0e418 LP |
816 | return 0; |
817 | } | |
818 | ||
819 | free(c); | |
820 | l *= 2; | |
821 | } | |
822 | } | |
823 | ||
2c7108c4 | 824 | int readlink_and_make_absolute(const char *p, char **r) { |
1058cbf2 ZJS |
825 | _cleanup_free_ char *target = NULL; |
826 | char *k; | |
2c7108c4 LP |
827 | int j; |
828 | ||
829 | assert(p); | |
830 | assert(r); | |
831 | ||
1058cbf2 ZJS |
832 | j = readlink_malloc(p, &target); |
833 | if (j < 0) | |
2c7108c4 LP |
834 | return j; |
835 | ||
836 | k = file_in_same_dir(p, target); | |
2c7108c4 LP |
837 | if (!k) |
838 | return -ENOMEM; | |
839 | ||
840 | *r = k; | |
841 | return 0; | |
842 | } | |
843 | ||
83096483 LP |
844 | int readlink_and_canonicalize(const char *p, char **r) { |
845 | char *t, *s; | |
846 | int j; | |
847 | ||
848 | assert(p); | |
849 | assert(r); | |
850 | ||
851 | j = readlink_and_make_absolute(p, &t); | |
852 | if (j < 0) | |
853 | return j; | |
854 | ||
855 | s = canonicalize_file_name(t); | |
856 | if (s) { | |
857 | free(t); | |
858 | *r = s; | |
859 | } else | |
860 | *r = t; | |
861 | ||
862 | path_kill_slashes(*r); | |
863 | ||
864 | return 0; | |
865 | } | |
866 | ||
2a987ee8 LP |
867 | int reset_all_signal_handlers(void) { |
868 | int sig; | |
869 | ||
870 | for (sig = 1; sig < _NSIG; sig++) { | |
b92bea5d ZJS |
871 | struct sigaction sa = { |
872 | .sa_handler = SIG_DFL, | |
873 | .sa_flags = SA_RESTART, | |
874 | }; | |
2a987ee8 LP |
875 | |
876 | if (sig == SIGKILL || sig == SIGSTOP) | |
877 | continue; | |
878 | ||
2a987ee8 LP |
879 | /* On Linux the first two RT signals are reserved by |
880 | * glibc, and sigaction() will return EINVAL for them. */ | |
881 | if ((sigaction(sig, &sa, NULL) < 0)) | |
882 | if (errno != EINVAL) | |
883 | return -errno; | |
884 | } | |
885 | ||
8e274523 | 886 | return 0; |
2a987ee8 | 887 | } |
4a72ff34 LP |
888 | |
889 | char *strstrip(char *s) { | |
57a8eca8 | 890 | char *e; |
4a72ff34 LP |
891 | |
892 | /* Drops trailing whitespace. Modifies the string in | |
893 | * place. Returns pointer to first non-space character */ | |
894 | ||
895 | s += strspn(s, WHITESPACE); | |
896 | ||
57a8eca8 LP |
897 | for (e = strchr(s, 0); e > s; e --) |
898 | if (!strchr(WHITESPACE, e[-1])) | |
899 | break; | |
4a72ff34 | 900 | |
57a8eca8 | 901 | *e = 0; |
4a72ff34 LP |
902 | |
903 | return s; | |
4a72ff34 LP |
904 | } |
905 | ||
ee9b5e01 LP |
906 | char *delete_chars(char *s, const char *bad) { |
907 | char *f, *t; | |
908 | ||
909 | /* Drops all whitespace, regardless where in the string */ | |
910 | ||
911 | for (f = s, t = s; *f; f++) { | |
912 | if (strchr(bad, *f)) | |
913 | continue; | |
914 | ||
915 | *(t++) = *f; | |
916 | } | |
917 | ||
918 | *t = 0; | |
919 | ||
920 | return s; | |
921 | } | |
922 | ||
ab1f0633 LP |
923 | bool in_charset(const char *s, const char* charset) { |
924 | const char *i; | |
925 | ||
926 | assert(s); | |
927 | assert(charset); | |
928 | ||
929 | for (i = s; *i; i++) | |
930 | if (!strchr(charset, *i)) | |
931 | return false; | |
932 | ||
933 | return true; | |
934 | } | |
935 | ||
4a72ff34 LP |
936 | char *file_in_same_dir(const char *path, const char *filename) { |
937 | char *e, *r; | |
938 | size_t k; | |
939 | ||
940 | assert(path); | |
941 | assert(filename); | |
942 | ||
943 | /* This removes the last component of path and appends | |
944 | * filename, unless the latter is absolute anyway or the | |
945 | * former isn't */ | |
946 | ||
947 | if (path_is_absolute(filename)) | |
948 | return strdup(filename); | |
949 | ||
950 | if (!(e = strrchr(path, '/'))) | |
951 | return strdup(filename); | |
952 | ||
953 | k = strlen(filename); | |
954 | if (!(r = new(char, e-path+1+k+1))) | |
955 | return NULL; | |
956 | ||
957 | memcpy(r, path, e-path+1); | |
958 | memcpy(r+(e-path)+1, filename, k+1); | |
959 | ||
960 | return r; | |
961 | } | |
fb624d04 | 962 | |
c32dd69b LP |
963 | int rmdir_parents(const char *path, const char *stop) { |
964 | size_t l; | |
965 | int r = 0; | |
966 | ||
967 | assert(path); | |
968 | assert(stop); | |
969 | ||
970 | l = strlen(path); | |
971 | ||
972 | /* Skip trailing slashes */ | |
973 | while (l > 0 && path[l-1] == '/') | |
974 | l--; | |
975 | ||
976 | while (l > 0) { | |
977 | char *t; | |
978 | ||
979 | /* Skip last component */ | |
980 | while (l > 0 && path[l-1] != '/') | |
981 | l--; | |
982 | ||
983 | /* Skip trailing slashes */ | |
984 | while (l > 0 && path[l-1] == '/') | |
985 | l--; | |
986 | ||
987 | if (l <= 0) | |
988 | break; | |
989 | ||
990 | if (!(t = strndup(path, l))) | |
991 | return -ENOMEM; | |
992 | ||
993 | if (path_startswith(stop, t)) { | |
994 | free(t); | |
995 | return 0; | |
996 | } | |
997 | ||
998 | r = rmdir(t); | |
999 | free(t); | |
1000 | ||
1001 | if (r < 0) | |
1002 | if (errno != ENOENT) | |
1003 | return -errno; | |
1004 | } | |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | ||
fb624d04 LP |
1009 | char hexchar(int x) { |
1010 | static const char table[16] = "0123456789abcdef"; | |
1011 | ||
1012 | return table[x & 15]; | |
1013 | } | |
4fe88d28 LP |
1014 | |
1015 | int unhexchar(char c) { | |
1016 | ||
1017 | if (c >= '0' && c <= '9') | |
1018 | return c - '0'; | |
1019 | ||
1020 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1021 | return c - 'a' + 10; |
4fe88d28 LP |
1022 | |
1023 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1024 | return c - 'A' + 10; |
4fe88d28 LP |
1025 | |
1026 | return -1; | |
1027 | } | |
1028 | ||
66e35261 LP |
1029 | char *hexmem(const void *p, size_t l) { |
1030 | char *r, *z; | |
1031 | const uint8_t *x; | |
1032 | ||
1033 | z = r = malloc(l * 2 + 1); | |
1034 | if (!r) | |
1035 | return NULL; | |
1036 | ||
1037 | for (x = p; x < (const uint8_t*) p + l; x++) { | |
1038 | *(z++) = hexchar(*x >> 4); | |
1039 | *(z++) = hexchar(*x & 15); | |
1040 | } | |
1041 | ||
1042 | *z = 0; | |
1043 | return r; | |
1044 | } | |
1045 | ||
2181a7f5 LP |
1046 | void *unhexmem(const char *p, size_t l) { |
1047 | uint8_t *r, *z; | |
1048 | const char *x; | |
1049 | ||
1050 | assert(p); | |
1051 | ||
1052 | z = r = malloc((l + 1) / 2 + 1); | |
1053 | if (!r) | |
1054 | return NULL; | |
1055 | ||
1056 | for (x = p; x < p + l; x += 2) { | |
1057 | int a, b; | |
1058 | ||
1059 | a = unhexchar(x[0]); | |
1060 | if (x+1 < p + l) | |
1061 | b = unhexchar(x[1]); | |
1062 | else | |
1063 | b = 0; | |
1064 | ||
1065 | *(z++) = (uint8_t) a << 4 | (uint8_t) b; | |
1066 | } | |
1067 | ||
1068 | *z = 0; | |
1069 | return r; | |
1070 | } | |
1071 | ||
4fe88d28 LP |
1072 | char octchar(int x) { |
1073 | return '0' + (x & 7); | |
1074 | } | |
1075 | ||
1076 | int unoctchar(char c) { | |
1077 | ||
1078 | if (c >= '0' && c <= '7') | |
1079 | return c - '0'; | |
1080 | ||
1081 | return -1; | |
1082 | } | |
1083 | ||
5af98f82 LP |
1084 | char decchar(int x) { |
1085 | return '0' + (x % 10); | |
1086 | } | |
1087 | ||
1088 | int undecchar(char c) { | |
1089 | ||
1090 | if (c >= '0' && c <= '9') | |
1091 | return c - '0'; | |
1092 | ||
1093 | return -1; | |
1094 | } | |
1095 | ||
4fe88d28 LP |
1096 | char *cescape(const char *s) { |
1097 | char *r, *t; | |
1098 | const char *f; | |
1099 | ||
1100 | assert(s); | |
1101 | ||
1102 | /* Does C style string escaping. */ | |
1103 | ||
f8e2fb7b LP |
1104 | r = new(char, strlen(s)*4 + 1); |
1105 | if (!r) | |
4fe88d28 LP |
1106 | return NULL; |
1107 | ||
1108 | for (f = s, t = r; *f; f++) | |
1109 | ||
1110 | switch (*f) { | |
1111 | ||
1112 | case '\a': | |
1113 | *(t++) = '\\'; | |
1114 | *(t++) = 'a'; | |
1115 | break; | |
1116 | case '\b': | |
1117 | *(t++) = '\\'; | |
1118 | *(t++) = 'b'; | |
1119 | break; | |
1120 | case '\f': | |
1121 | *(t++) = '\\'; | |
1122 | *(t++) = 'f'; | |
1123 | break; | |
1124 | case '\n': | |
1125 | *(t++) = '\\'; | |
1126 | *(t++) = 'n'; | |
1127 | break; | |
1128 | case '\r': | |
1129 | *(t++) = '\\'; | |
1130 | *(t++) = 'r'; | |
1131 | break; | |
1132 | case '\t': | |
1133 | *(t++) = '\\'; | |
1134 | *(t++) = 't'; | |
1135 | break; | |
1136 | case '\v': | |
1137 | *(t++) = '\\'; | |
1138 | *(t++) = 'v'; | |
1139 | break; | |
1140 | case '\\': | |
1141 | *(t++) = '\\'; | |
1142 | *(t++) = '\\'; | |
1143 | break; | |
1144 | case '"': | |
1145 | *(t++) = '\\'; | |
1146 | *(t++) = '"'; | |
1147 | break; | |
1148 | case '\'': | |
1149 | *(t++) = '\\'; | |
1150 | *(t++) = '\''; | |
1151 | break; | |
1152 | ||
1153 | default: | |
1154 | /* For special chars we prefer octal over | |
1155 | * hexadecimal encoding, simply because glib's | |
1156 | * g_strescape() does the same */ | |
1157 | if ((*f < ' ') || (*f >= 127)) { | |
1158 | *(t++) = '\\'; | |
1159 | *(t++) = octchar((unsigned char) *f >> 6); | |
1160 | *(t++) = octchar((unsigned char) *f >> 3); | |
1161 | *(t++) = octchar((unsigned char) *f); | |
1162 | } else | |
1163 | *(t++) = *f; | |
1164 | break; | |
1165 | } | |
1166 | ||
1167 | *t = 0; | |
1168 | ||
1169 | return r; | |
1170 | } | |
1171 | ||
5b4c61cd | 1172 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1173 | char *r, *t; |
1174 | const char *f; | |
5b4c61cd | 1175 | size_t pl; |
4fe88d28 LP |
1176 | |
1177 | assert(s); | |
1178 | ||
5b4c61cd LP |
1179 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1180 | ||
1181 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1182 | |
5b4c61cd | 1183 | r = new(char, pl+length+1); |
7f110ff9 | 1184 | if (!r) |
4fe88d28 LP |
1185 | return r; |
1186 | ||
5b4c61cd LP |
1187 | if (prefix) |
1188 | memcpy(r, prefix, pl); | |
1189 | ||
1190 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1191 | |
1192 | if (*f != '\\') { | |
1193 | *(t++) = *f; | |
1194 | continue; | |
1195 | } | |
1196 | ||
1197 | f++; | |
1198 | ||
1199 | switch (*f) { | |
1200 | ||
1201 | case 'a': | |
1202 | *(t++) = '\a'; | |
1203 | break; | |
1204 | case 'b': | |
1205 | *(t++) = '\b'; | |
1206 | break; | |
1207 | case 'f': | |
1208 | *(t++) = '\f'; | |
1209 | break; | |
1210 | case 'n': | |
1211 | *(t++) = '\n'; | |
1212 | break; | |
1213 | case 'r': | |
1214 | *(t++) = '\r'; | |
1215 | break; | |
1216 | case 't': | |
1217 | *(t++) = '\t'; | |
1218 | break; | |
1219 | case 'v': | |
1220 | *(t++) = '\v'; | |
1221 | break; | |
1222 | case '\\': | |
1223 | *(t++) = '\\'; | |
1224 | break; | |
1225 | case '"': | |
1226 | *(t++) = '"'; | |
1227 | break; | |
1228 | case '\'': | |
1229 | *(t++) = '\''; | |
1230 | break; | |
1231 | ||
e167fb86 LP |
1232 | case 's': |
1233 | /* This is an extension of the XDG syntax files */ | |
1234 | *(t++) = ' '; | |
1235 | break; | |
1236 | ||
4fe88d28 LP |
1237 | case 'x': { |
1238 | /* hexadecimal encoding */ | |
1239 | int a, b; | |
1240 | ||
7f110ff9 LP |
1241 | a = unhexchar(f[1]); |
1242 | b = unhexchar(f[2]); | |
1243 | ||
1244 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1245 | /* Invalid escape code, let's take it literal then */ |
1246 | *(t++) = '\\'; | |
1247 | *(t++) = 'x'; | |
1248 | } else { | |
1249 | *(t++) = (char) ((a << 4) | b); | |
1250 | f += 2; | |
1251 | } | |
1252 | ||
1253 | break; | |
1254 | } | |
1255 | ||
1256 | case '0': | |
1257 | case '1': | |
1258 | case '2': | |
1259 | case '3': | |
1260 | case '4': | |
1261 | case '5': | |
1262 | case '6': | |
1263 | case '7': { | |
1264 | /* octal encoding */ | |
1265 | int a, b, c; | |
1266 | ||
7f110ff9 LP |
1267 | a = unoctchar(f[0]); |
1268 | b = unoctchar(f[1]); | |
1269 | c = unoctchar(f[2]); | |
1270 | ||
1271 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1272 | /* Invalid escape code, let's take it literal then */ |
1273 | *(t++) = '\\'; | |
1274 | *(t++) = f[0]; | |
1275 | } else { | |
1276 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1277 | f += 2; | |
1278 | } | |
1279 | ||
1280 | break; | |
1281 | } | |
1282 | ||
1283 | case 0: | |
1284 | /* premature end of string.*/ | |
1285 | *(t++) = '\\'; | |
1286 | goto finish; | |
1287 | ||
1288 | default: | |
1289 | /* Invalid escape code, let's take it literal then */ | |
1290 | *(t++) = '\\'; | |
f3d4cc01 | 1291 | *(t++) = *f; |
4fe88d28 LP |
1292 | break; |
1293 | } | |
1294 | } | |
1295 | ||
1296 | finish: | |
1297 | *t = 0; | |
1298 | return r; | |
1299 | } | |
1300 | ||
5b4c61cd LP |
1301 | char *cunescape_length(const char *s, size_t length) { |
1302 | return cunescape_length_with_prefix(s, length, NULL); | |
1303 | } | |
1304 | ||
6febfd0d | 1305 | char *cunescape(const char *s) { |
5b4c61cd LP |
1306 | assert(s); |
1307 | ||
6febfd0d LP |
1308 | return cunescape_length(s, strlen(s)); |
1309 | } | |
4fe88d28 LP |
1310 | |
1311 | char *xescape(const char *s, const char *bad) { | |
1312 | char *r, *t; | |
1313 | const char *f; | |
1314 | ||
1315 | /* Escapes all chars in bad, in addition to \ and all special | |
1316 | * chars, in \xFF style escaping. May be reversed with | |
1317 | * cunescape. */ | |
1318 | ||
08ace05b LP |
1319 | r = new(char, strlen(s) * 4 + 1); |
1320 | if (!r) | |
4fe88d28 LP |
1321 | return NULL; |
1322 | ||
1323 | for (f = s, t = r; *f; f++) { | |
1324 | ||
b866264a LP |
1325 | if ((*f < ' ') || (*f >= 127) || |
1326 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1327 | *(t++) = '\\'; |
1328 | *(t++) = 'x'; | |
1329 | *(t++) = hexchar(*f >> 4); | |
1330 | *(t++) = hexchar(*f); | |
1331 | } else | |
1332 | *(t++) = *f; | |
1333 | } | |
1334 | ||
1335 | *t = 0; | |
1336 | ||
1337 | return r; | |
1338 | } | |
1339 | ||
67d51650 | 1340 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1341 | char *p; |
1342 | ||
67d51650 | 1343 | assert(t); |
4fe88d28 | 1344 | |
67d51650 | 1345 | for (p = t; *p; p++) |
4fe88d28 LP |
1346 | if (*p >= 'A' && *p <= 'Z') |
1347 | *p = *p - 'A' + 'a'; | |
1348 | ||
67d51650 | 1349 | return t; |
4fe88d28 | 1350 | } |
1dccbe19 | 1351 | |
44a6b1b6 | 1352 | _pure_ static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1353 | assert(filename); |
1354 | ||
1355 | return | |
1356 | filename[0] == '.' || | |
6c78be3c | 1357 | streq(filename, "lost+found") || |
e472d476 LP |
1358 | streq(filename, "aquota.user") || |
1359 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1360 | endswith(filename, ".rpmnew") || |
1361 | endswith(filename, ".rpmsave") || | |
1362 | endswith(filename, ".rpmorig") || | |
1363 | endswith(filename, ".dpkg-old") || | |
1364 | endswith(filename, ".dpkg-new") || | |
1365 | endswith(filename, ".swp"); | |
1366 | } | |
1367 | ||
a228a22f LP |
1368 | bool ignore_file(const char *filename) { |
1369 | assert(filename); | |
1370 | ||
1371 | if (endswith(filename, "~")) | |
1372 | return false; | |
1373 | ||
1374 | return ignore_file_allow_backup(filename); | |
1375 | } | |
1376 | ||
3a0ecb08 LP |
1377 | int fd_nonblock(int fd, bool nonblock) { |
1378 | int flags; | |
1379 | ||
1380 | assert(fd >= 0); | |
1381 | ||
1382 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1383 | return -errno; | |
1384 | ||
1385 | if (nonblock) | |
1386 | flags |= O_NONBLOCK; | |
1387 | else | |
1388 | flags &= ~O_NONBLOCK; | |
1389 | ||
1390 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1391 | return -errno; | |
1392 | ||
1393 | return 0; | |
1394 | } | |
1395 | ||
1396 | int fd_cloexec(int fd, bool cloexec) { | |
1397 | int flags; | |
1398 | ||
1399 | assert(fd >= 0); | |
1400 | ||
1401 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1402 | return -errno; | |
1403 | ||
1404 | if (cloexec) | |
1405 | flags |= FD_CLOEXEC; | |
1406 | else | |
1407 | flags &= ~FD_CLOEXEC; | |
1408 | ||
1409 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1410 | return -errno; | |
1411 | ||
1412 | return 0; | |
1413 | } | |
1414 | ||
44a6b1b6 | 1415 | _pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
b19be9eb LP |
1416 | unsigned i; |
1417 | ||
1418 | assert(n_fdset == 0 || fdset); | |
1419 | ||
1420 | for (i = 0; i < n_fdset; i++) | |
1421 | if (fdset[i] == fd) | |
1422 | return true; | |
1423 | ||
1424 | return false; | |
1425 | } | |
1426 | ||
a0d40ac5 LP |
1427 | int close_all_fds(const int except[], unsigned n_except) { |
1428 | DIR *d; | |
1429 | struct dirent *de; | |
1430 | int r = 0; | |
1431 | ||
b19be9eb LP |
1432 | assert(n_except == 0 || except); |
1433 | ||
1434 | d = opendir("/proc/self/fd"); | |
1435 | if (!d) { | |
1436 | int fd; | |
1437 | struct rlimit rl; | |
1438 | ||
1439 | /* When /proc isn't available (for example in chroots) | |
1440 | * the fallback is brute forcing through the fd | |
1441 | * table */ | |
1442 | ||
1443 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1444 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1445 | ||
1446 | if (fd_in_set(fd, except, n_except)) | |
1447 | continue; | |
1448 | ||
1449 | if (close_nointr(fd) < 0) | |
1450 | if (errno != EBADF && r == 0) | |
1451 | r = -errno; | |
1452 | } | |
1453 | ||
1454 | return r; | |
1455 | } | |
a0d40ac5 LP |
1456 | |
1457 | while ((de = readdir(d))) { | |
a7610064 | 1458 | int fd = -1; |
a0d40ac5 | 1459 | |
a16e1123 | 1460 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1461 | continue; |
1462 | ||
720ce21d LP |
1463 | if (safe_atoi(de->d_name, &fd) < 0) |
1464 | /* Let's better ignore this, just in case */ | |
1465 | continue; | |
a0d40ac5 LP |
1466 | |
1467 | if (fd < 3) | |
1468 | continue; | |
1469 | ||
1470 | if (fd == dirfd(d)) | |
1471 | continue; | |
1472 | ||
b19be9eb LP |
1473 | if (fd_in_set(fd, except, n_except)) |
1474 | continue; | |
a0d40ac5 | 1475 | |
720ce21d | 1476 | if (close_nointr(fd) < 0) { |
2f357920 | 1477 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1478 | if (errno != EBADF && r == 0) |
1479 | r = -errno; | |
2f357920 | 1480 | } |
a0d40ac5 LP |
1481 | } |
1482 | ||
a0d40ac5 LP |
1483 | closedir(d); |
1484 | return r; | |
1485 | } | |
1486 | ||
db12775d LP |
1487 | bool chars_intersect(const char *a, const char *b) { |
1488 | const char *p; | |
1489 | ||
1490 | /* Returns true if any of the chars in a are in b. */ | |
1491 | for (p = a; *p; p++) | |
1492 | if (strchr(b, *p)) | |
1493 | return true; | |
1494 | ||
1495 | return false; | |
1496 | } | |
1497 | ||
42856c10 | 1498 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
1499 | static const char table[] = |
1500 | "cifs\0" | |
1501 | "smbfs\0" | |
1502 | "ncpfs\0" | |
dac70dc7 | 1503 | "ncp\0" |
a05f97b3 LP |
1504 | "nfs\0" |
1505 | "nfs4\0" | |
1506 | "gfs\0" | |
73836c5c | 1507 | "gfs2\0"; |
42856c10 | 1508 | |
a05f97b3 | 1509 | return nulstr_contains(table, fstype); |
42856c10 LP |
1510 | } |
1511 | ||
601f6a1e | 1512 | int chvt(int vt) { |
a05f97b3 | 1513 | _cleanup_close_ int fd; |
601f6a1e | 1514 | |
a05f97b3 LP |
1515 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1516 | if (fd < 0) | |
601f6a1e LP |
1517 | return -errno; |
1518 | ||
1519 | if (vt < 0) { | |
1520 | int tiocl[2] = { | |
1521 | TIOCL_GETKMSGREDIRECT, | |
1522 | 0 | |
1523 | }; | |
1524 | ||
a05f97b3 LP |
1525 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1526 | return -errno; | |
601f6a1e LP |
1527 | |
1528 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1529 | } | |
1530 | ||
1531 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1532 | return -errno; |
601f6a1e | 1533 | |
a05f97b3 | 1534 | return 0; |
601f6a1e LP |
1535 | } |
1536 | ||
8f2d43a0 | 1537 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
1538 | struct termios old_termios, new_termios; |
1539 | char c; | |
20c03b7b | 1540 | char line[LINE_MAX]; |
80876c20 LP |
1541 | |
1542 | assert(f); | |
1543 | assert(ret); | |
1544 | ||
1545 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1546 | new_termios = old_termios; | |
1547 | ||
1548 | new_termios.c_lflag &= ~ICANON; | |
1549 | new_termios.c_cc[VMIN] = 1; | |
1550 | new_termios.c_cc[VTIME] = 0; | |
1551 | ||
1552 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1553 | size_t k; | |
1554 | ||
8f2d43a0 LP |
1555 | if (t != (usec_t) -1) { |
1556 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
1557 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1558 | return -ETIMEDOUT; | |
1559 | } | |
1560 | } | |
1561 | ||
80876c20 LP |
1562 | k = fread(&c, 1, 1, f); |
1563 | ||
1564 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1565 | ||
1566 | if (k <= 0) | |
1567 | return -EIO; | |
1568 | ||
1569 | if (need_nl) | |
1570 | *need_nl = c != '\n'; | |
1571 | ||
1572 | *ret = c; | |
1573 | return 0; | |
1574 | } | |
1575 | } | |
1576 | ||
8f2d43a0 LP |
1577 | if (t != (usec_t) -1) |
1578 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
1579 | return -ETIMEDOUT; | |
1580 | ||
1581 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
1582 | return -EIO; |
1583 | ||
1584 | truncate_nl(line); | |
1585 | ||
1586 | if (strlen(line) != 1) | |
1587 | return -EBADMSG; | |
1588 | ||
1589 | if (need_nl) | |
1590 | *need_nl = false; | |
1591 | ||
1592 | *ret = line[0]; | |
1593 | return 0; | |
1594 | } | |
1595 | ||
1596 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 | 1597 | |
80876c20 LP |
1598 | assert(ret); |
1599 | assert(replies); | |
1600 | assert(text); | |
1601 | ||
1602 | for (;;) { | |
1603 | va_list ap; | |
1604 | char c; | |
1605 | int r; | |
1606 | bool need_nl = true; | |
1607 | ||
8481248b | 1608 | if (on_tty()) |
c1072ea0 | 1609 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1610 | |
80876c20 LP |
1611 | va_start(ap, text); |
1612 | vprintf(text, ap); | |
1613 | va_end(ap); | |
1614 | ||
8481248b | 1615 | if (on_tty()) |
c1072ea0 | 1616 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1617 | |
80876c20 LP |
1618 | fflush(stdout); |
1619 | ||
8f2d43a0 LP |
1620 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
1621 | if (r < 0) { | |
80876c20 LP |
1622 | |
1623 | if (r == -EBADMSG) { | |
1624 | puts("Bad input, please try again."); | |
1625 | continue; | |
1626 | } | |
1627 | ||
1628 | putchar('\n'); | |
1629 | return r; | |
1630 | } | |
1631 | ||
1632 | if (need_nl) | |
1633 | putchar('\n'); | |
1634 | ||
1635 | if (strchr(replies, c)) { | |
1636 | *ret = c; | |
1637 | return 0; | |
1638 | } | |
1639 | ||
1640 | puts("Read unexpected character, please try again."); | |
1641 | } | |
1642 | } | |
1643 | ||
512947d4 | 1644 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
1645 | struct termios termios; |
1646 | int r = 0; | |
3fe5e5d4 LP |
1647 | |
1648 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
1649 | |
1650 | assert(fd >= 0); | |
1651 | ||
eed1d0e3 LP |
1652 | /* We leave locked terminal attributes untouched, so that |
1653 | * Plymouth may set whatever it wants to set, and we don't | |
1654 | * interfere with that. */ | |
3fe5e5d4 LP |
1655 | |
1656 | /* Disable exclusive mode, just in case */ | |
1657 | ioctl(fd, TIOCNXCL); | |
1658 | ||
5c0100a5 | 1659 | /* Switch to text mode */ |
512947d4 MS |
1660 | if (switch_to_text) |
1661 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 1662 | |
3fe5e5d4 | 1663 | /* Enable console unicode mode */ |
df465b3f | 1664 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
1665 | |
1666 | if (tcgetattr(fd, &termios) < 0) { | |
1667 | r = -errno; | |
1668 | goto finish; | |
1669 | } | |
1670 | ||
aaf694ca LP |
1671 | /* We only reset the stuff that matters to the software. How |
1672 | * hardware is set up we don't touch assuming that somebody | |
1673 | * else will do that for us */ | |
1674 | ||
1675 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
1676 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
1677 | termios.c_oflag |= ONLCR; | |
1678 | termios.c_cflag |= CREAD; | |
1679 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
1680 | ||
1681 | termios.c_cc[VINTR] = 03; /* ^C */ | |
1682 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
1683 | termios.c_cc[VERASE] = 0177; | |
1684 | termios.c_cc[VKILL] = 025; /* ^X */ | |
1685 | termios.c_cc[VEOF] = 04; /* ^D */ | |
1686 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
1687 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
1688 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
1689 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
1690 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
1691 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
1692 | termios.c_cc[VEOL] = 0; |
1693 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
1694 | |
1695 | termios.c_cc[VTIME] = 0; | |
1696 | termios.c_cc[VMIN] = 1; | |
1697 | ||
1698 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
1699 | r = -errno; | |
1700 | ||
1701 | finish: | |
1702 | /* Just in case, flush all crap out */ | |
1703 | tcflush(fd, TCIOFLUSH); | |
1704 | ||
1705 | return r; | |
1706 | } | |
1707 | ||
6ea832a2 LP |
1708 | int reset_terminal(const char *name) { |
1709 | int fd, r; | |
1710 | ||
1711 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
1712 | if (fd < 0) | |
1713 | return fd; | |
1714 | ||
512947d4 | 1715 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
1716 | close_nointr_nofail(fd); |
1717 | ||
1718 | return r; | |
1719 | } | |
1720 | ||
80876c20 LP |
1721 | int open_terminal(const char *name, int mode) { |
1722 | int fd, r; | |
f73f76ac | 1723 | unsigned c = 0; |
80876c20 | 1724 | |
f73f76ac LP |
1725 | /* |
1726 | * If a TTY is in the process of being closed opening it might | |
1727 | * cause EIO. This is horribly awful, but unlikely to be | |
1728 | * changed in the kernel. Hence we work around this problem by | |
1729 | * retrying a couple of times. | |
1730 | * | |
1731 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
1732 | */ | |
1733 | ||
dd94c17e LP |
1734 | assert(!(mode & O_CREAT)); |
1735 | ||
f73f76ac | 1736 | for (;;) { |
dd94c17e | 1737 | fd = open(name, mode, 0); |
af6da548 | 1738 | if (fd >= 0) |
f73f76ac LP |
1739 | break; |
1740 | ||
1741 | if (errno != EIO) | |
1742 | return -errno; | |
1743 | ||
af6da548 | 1744 | /* Max 1s in total */ |
f73f76ac LP |
1745 | if (c >= 20) |
1746 | return -errno; | |
1747 | ||
1748 | usleep(50 * USEC_PER_MSEC); | |
1749 | c++; | |
1750 | } | |
1751 | ||
1752 | if (fd < 0) | |
80876c20 LP |
1753 | return -errno; |
1754 | ||
af6da548 LP |
1755 | r = isatty(fd); |
1756 | if (r < 0) { | |
80876c20 LP |
1757 | close_nointr_nofail(fd); |
1758 | return -errno; | |
1759 | } | |
1760 | ||
1761 | if (!r) { | |
1762 | close_nointr_nofail(fd); | |
1763 | return -ENOTTY; | |
1764 | } | |
1765 | ||
1766 | return fd; | |
1767 | } | |
1768 | ||
1769 | int flush_fd(int fd) { | |
b92bea5d ZJS |
1770 | struct pollfd pollfd = { |
1771 | .fd = fd, | |
1772 | .events = POLLIN, | |
1773 | }; | |
80876c20 LP |
1774 | |
1775 | for (;;) { | |
20c03b7b | 1776 | char buf[LINE_MAX]; |
80876c20 LP |
1777 | ssize_t l; |
1778 | int r; | |
1779 | ||
e62d8c39 ZJS |
1780 | r = poll(&pollfd, 1, 0); |
1781 | if (r < 0) { | |
80876c20 LP |
1782 | if (errno == EINTR) |
1783 | continue; | |
1784 | ||
1785 | return -errno; | |
80876c20 | 1786 | |
e62d8c39 | 1787 | } else if (r == 0) |
80876c20 LP |
1788 | return 0; |
1789 | ||
e62d8c39 ZJS |
1790 | l = read(fd, buf, sizeof(buf)); |
1791 | if (l < 0) { | |
80876c20 LP |
1792 | |
1793 | if (errno == EINTR) | |
1794 | continue; | |
1795 | ||
1796 | if (errno == EAGAIN) | |
1797 | return 0; | |
1798 | ||
1799 | return -errno; | |
e62d8c39 | 1800 | } else if (l == 0) |
80876c20 LP |
1801 | return 0; |
1802 | } | |
1803 | } | |
1804 | ||
af6da548 LP |
1805 | int acquire_terminal( |
1806 | const char *name, | |
1807 | bool fail, | |
1808 | bool force, | |
1809 | bool ignore_tiocstty_eperm, | |
1810 | usec_t timeout) { | |
1811 | ||
4a0ff478 | 1812 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 1813 | usec_t ts = 0; |
80876c20 LP |
1814 | |
1815 | assert(name); | |
1816 | ||
1817 | /* We use inotify to be notified when the tty is closed. We | |
1818 | * create the watch before checking if we can actually acquire | |
1819 | * it, so that we don't lose any event. | |
1820 | * | |
1821 | * Note: strictly speaking this actually watches for the | |
1822 | * device being closed, it does *not* really watch whether a | |
1823 | * tty loses its controlling process. However, unless some | |
1824 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
1825 | * its tty otherwise this will not become a problem. As long | |
1826 | * as the administrator makes sure not configure any service | |
1827 | * on the same tty as an untrusted user this should not be a | |
1828 | * problem. (Which he probably should not do anyway.) */ | |
1829 | ||
af6da548 LP |
1830 | if (timeout != (usec_t) -1) |
1831 | ts = now(CLOCK_MONOTONIC); | |
1832 | ||
80876c20 | 1833 | if (!fail && !force) { |
af6da548 LP |
1834 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
1835 | if (notify < 0) { | |
80876c20 LP |
1836 | r = -errno; |
1837 | goto fail; | |
1838 | } | |
1839 | ||
af6da548 LP |
1840 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
1841 | if (wd < 0) { | |
80876c20 LP |
1842 | r = -errno; |
1843 | goto fail; | |
1844 | } | |
1845 | } | |
1846 | ||
1847 | for (;;) { | |
b92bea5d ZJS |
1848 | struct sigaction sa_old, sa_new = { |
1849 | .sa_handler = SIG_IGN, | |
1850 | .sa_flags = SA_RESTART, | |
1851 | }; | |
1852 | ||
af6da548 LP |
1853 | if (notify >= 0) { |
1854 | r = flush_fd(notify); | |
1855 | if (r < 0) | |
e3d1855b | 1856 | goto fail; |
af6da548 | 1857 | } |
80876c20 LP |
1858 | |
1859 | /* We pass here O_NOCTTY only so that we can check the return | |
1860 | * value TIOCSCTTY and have a reliable way to figure out if we | |
1861 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
1862 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
1863 | if (fd < 0) | |
6ea832a2 | 1864 | return fd; |
80876c20 | 1865 | |
32c4bef8 LP |
1866 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1867 | * if we already own the tty. */ | |
32c4bef8 LP |
1868 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
1869 | ||
80876c20 | 1870 | /* First, try to get the tty */ |
32c4bef8 LP |
1871 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
1872 | r = -errno; | |
1873 | ||
1874 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
1875 | |
1876 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
1877 | * returning EPERM, i.e. when very likely we already | |
1878 | * are have this controlling terminal. */ | |
32c4bef8 | 1879 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
1880 | r = 0; |
1881 | ||
32c4bef8 | 1882 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
1883 | goto fail; |
1884 | } | |
1885 | ||
1886 | if (r >= 0) | |
1887 | break; | |
1888 | ||
1889 | assert(!fail); | |
1890 | assert(!force); | |
1891 | assert(notify >= 0); | |
1892 | ||
1893 | for (;;) { | |
f601daa7 | 1894 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 1895 | ssize_t l; |
f601daa7 | 1896 | struct inotify_event *e; |
80876c20 | 1897 | |
af6da548 LP |
1898 | if (timeout != (usec_t) -1) { |
1899 | usec_t n; | |
1900 | ||
1901 | n = now(CLOCK_MONOTONIC); | |
1902 | if (ts + timeout < n) { | |
1903 | r = -ETIMEDOUT; | |
1904 | goto fail; | |
1905 | } | |
1906 | ||
1907 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
1908 | if (r < 0) | |
1909 | goto fail; | |
1910 | ||
1911 | if (r == 0) { | |
1912 | r = -ETIMEDOUT; | |
1913 | goto fail; | |
1914 | } | |
1915 | } | |
1916 | ||
1917 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
1918 | if (l < 0) { | |
80876c20 | 1919 | |
af6da548 | 1920 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
1921 | continue; |
1922 | ||
1923 | r = -errno; | |
1924 | goto fail; | |
1925 | } | |
1926 | ||
1927 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 1928 | |
f601daa7 LP |
1929 | while (l > 0) { |
1930 | size_t step; | |
80876c20 | 1931 | |
f601daa7 | 1932 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 1933 | r = -EIO; |
f601daa7 LP |
1934 | goto fail; |
1935 | } | |
80876c20 | 1936 | |
f601daa7 LP |
1937 | step = sizeof(struct inotify_event) + e->len; |
1938 | assert(step <= (size_t) l); | |
80876c20 | 1939 | |
f601daa7 LP |
1940 | e = (struct inotify_event*) ((uint8_t*) e + step); |
1941 | l -= step; | |
80876c20 LP |
1942 | } |
1943 | ||
1944 | break; | |
1945 | } | |
1946 | ||
1947 | /* We close the tty fd here since if the old session | |
1948 | * ended our handle will be dead. It's important that | |
1949 | * we do this after sleeping, so that we don't enter | |
1950 | * an endless loop. */ | |
1951 | close_nointr_nofail(fd); | |
1952 | } | |
1953 | ||
1954 | if (notify >= 0) | |
a16e1123 | 1955 | close_nointr_nofail(notify); |
80876c20 | 1956 | |
512947d4 MS |
1957 | r = reset_terminal_fd(fd, true); |
1958 | if (r < 0) | |
80876c20 LP |
1959 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
1960 | ||
1961 | return fd; | |
1962 | ||
1963 | fail: | |
1964 | if (fd >= 0) | |
a16e1123 | 1965 | close_nointr_nofail(fd); |
80876c20 LP |
1966 | |
1967 | if (notify >= 0) | |
a16e1123 | 1968 | close_nointr_nofail(notify); |
80876c20 LP |
1969 | |
1970 | return r; | |
1971 | } | |
1972 | ||
1973 | int release_terminal(void) { | |
e62d8c39 | 1974 | int r = 0; |
b92bea5d ZJS |
1975 | struct sigaction sa_old, sa_new = { |
1976 | .sa_handler = SIG_IGN, | |
1977 | .sa_flags = SA_RESTART, | |
1978 | }; | |
7fd1b19b | 1979 | _cleanup_close_ int fd; |
80876c20 | 1980 | |
e62d8c39 ZJS |
1981 | fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC); |
1982 | if (fd < 0) | |
80876c20 LP |
1983 | return -errno; |
1984 | ||
57cd2192 LP |
1985 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1986 | * by our own TIOCNOTTY */ | |
57cd2192 LP |
1987 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
1988 | ||
80876c20 LP |
1989 | if (ioctl(fd, TIOCNOTTY) < 0) |
1990 | r = -errno; | |
1991 | ||
57cd2192 LP |
1992 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
1993 | ||
80876c20 LP |
1994 | return r; |
1995 | } | |
1996 | ||
9a34ec5f LP |
1997 | int sigaction_many(const struct sigaction *sa, ...) { |
1998 | va_list ap; | |
1999 | int r = 0, sig; | |
2000 | ||
2001 | va_start(ap, sa); | |
2002 | while ((sig = va_arg(ap, int)) > 0) | |
2003 | if (sigaction(sig, sa, NULL) < 0) | |
2004 | r = -errno; | |
2005 | va_end(ap); | |
2006 | ||
2007 | return r; | |
2008 | } | |
2009 | ||
2010 | int ignore_signals(int sig, ...) { | |
b92bea5d ZJS |
2011 | struct sigaction sa = { |
2012 | .sa_handler = SIG_IGN, | |
2013 | .sa_flags = SA_RESTART, | |
2014 | }; | |
9a34ec5f LP |
2015 | va_list ap; |
2016 | int r = 0; | |
a337c6fc | 2017 | |
a337c6fc | 2018 | |
9a34ec5f LP |
2019 | if (sigaction(sig, &sa, NULL) < 0) |
2020 | r = -errno; | |
2021 | ||
2022 | va_start(ap, sig); | |
2023 | while ((sig = va_arg(ap, int)) > 0) | |
2024 | if (sigaction(sig, &sa, NULL) < 0) | |
2025 | r = -errno; | |
2026 | va_end(ap); | |
2027 | ||
2028 | return r; | |
2029 | } | |
2030 | ||
2031 | int default_signals(int sig, ...) { | |
b92bea5d ZJS |
2032 | struct sigaction sa = { |
2033 | .sa_handler = SIG_DFL, | |
2034 | .sa_flags = SA_RESTART, | |
2035 | }; | |
9a34ec5f LP |
2036 | va_list ap; |
2037 | int r = 0; | |
2038 | ||
9a34ec5f LP |
2039 | if (sigaction(sig, &sa, NULL) < 0) |
2040 | r = -errno; | |
2041 | ||
2042 | va_start(ap, sig); | |
2043 | while ((sig = va_arg(ap, int)) > 0) | |
2044 | if (sigaction(sig, &sa, NULL) < 0) | |
2045 | r = -errno; | |
2046 | va_end(ap); | |
2047 | ||
2048 | return r; | |
a337c6fc LP |
2049 | } |
2050 | ||
8d567588 LP |
2051 | int close_pipe(int p[]) { |
2052 | int a = 0, b = 0; | |
2053 | ||
2054 | assert(p); | |
2055 | ||
2056 | if (p[0] >= 0) { | |
2057 | a = close_nointr(p[0]); | |
2058 | p[0] = -1; | |
2059 | } | |
2060 | ||
2061 | if (p[1] >= 0) { | |
2062 | b = close_nointr(p[1]); | |
2063 | p[1] = -1; | |
2064 | } | |
2065 | ||
2066 | return a < 0 ? a : b; | |
2067 | } | |
2068 | ||
eb22ac37 | 2069 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2070 | uint8_t *p = buf; |
8d567588 LP |
2071 | ssize_t n = 0; |
2072 | ||
2073 | assert(fd >= 0); | |
2074 | assert(buf); | |
2075 | ||
8d567588 LP |
2076 | while (nbytes > 0) { |
2077 | ssize_t k; | |
2078 | ||
7d5dd5e0 LP |
2079 | k = read(fd, p, nbytes); |
2080 | if (k < 0 && errno == EINTR) | |
2081 | continue; | |
8d567588 | 2082 | |
7d5dd5e0 | 2083 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 | 2084 | |
7d5dd5e0 LP |
2085 | /* We knowingly ignore any return value here, |
2086 | * and expect that any error/EOF is reported | |
2087 | * via read() */ | |
8d567588 | 2088 | |
7d5dd5e0 LP |
2089 | fd_wait_for_event(fd, POLLIN, (usec_t) -1); |
2090 | continue; | |
2091 | } | |
8d567588 | 2092 | |
7d5dd5e0 | 2093 | if (k <= 0) |
8d567588 | 2094 | return n > 0 ? n : (k < 0 ? -errno : 0); |
8d567588 LP |
2095 | |
2096 | p += k; | |
2097 | nbytes -= k; | |
2098 | n += k; | |
2099 | } | |
2100 | ||
2101 | return n; | |
2102 | } | |
2103 | ||
eb22ac37 | 2104 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2105 | const uint8_t *p = buf; |
eb22ac37 LP |
2106 | ssize_t n = 0; |
2107 | ||
2108 | assert(fd >= 0); | |
2109 | assert(buf); | |
2110 | ||
eb22ac37 LP |
2111 | while (nbytes > 0) { |
2112 | ssize_t k; | |
2113 | ||
fe652127 | 2114 | k = write(fd, p, nbytes); |
7d5dd5e0 LP |
2115 | if (k < 0 && errno == EINTR) |
2116 | continue; | |
eb22ac37 | 2117 | |
7d5dd5e0 | 2118 | if (k < 0 && errno == EAGAIN && do_poll) { |
eb22ac37 | 2119 | |
7d5dd5e0 LP |
2120 | /* We knowingly ignore any return value here, |
2121 | * and expect that any error/EOF is reported | |
2122 | * via write() */ | |
eb22ac37 | 2123 | |
7d5dd5e0 LP |
2124 | fd_wait_for_event(fd, POLLOUT, (usec_t) -1); |
2125 | continue; | |
2126 | } | |
eb22ac37 | 2127 | |
7d5dd5e0 | 2128 | if (k <= 0) |
eb22ac37 | 2129 | return n > 0 ? n : (k < 0 ? -errno : 0); |
eb22ac37 LP |
2130 | |
2131 | p += k; | |
2132 | nbytes -= k; | |
2133 | n += k; | |
2134 | } | |
2135 | ||
2136 | return n; | |
2137 | } | |
2138 | ||
5556b5fe LP |
2139 | int parse_size(const char *t, off_t base, off_t *size) { |
2140 | ||
2141 | /* Soo, sometimes we want to parse IEC binary suffxies, and | |
2142 | * sometimes SI decimal suffixes. This function can parse | |
2143 | * both. Which one is the right way depends on the | |
2144 | * context. Wikipedia suggests that SI is customary for | |
2145 | * hardrware metrics and network speeds, while IEC is | |
2146 | * customary for most data sizes used by software and volatile | |
2147 | * (RAM) memory. Hence be careful which one you pick! | |
2148 | * | |
2149 | * In either case we use just K, M, G as suffix, and not Ki, | |
2150 | * Mi, Gi or so (as IEC would suggest). That's because that's | |
2151 | * frickin' ugly. But this means you really need to make sure | |
2152 | * to document which base you are parsing when you use this | |
2153 | * call. */ | |
2154 | ||
2155 | struct table { | |
ab1f0633 | 2156 | const char *suffix; |
b32ff512 | 2157 | unsigned long long factor; |
5556b5fe LP |
2158 | }; |
2159 | ||
2160 | static const struct table iec[] = { | |
32895bb3 | 2161 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
840292be ZJS |
2162 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2163 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
2164 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2165 | { "M", 1024ULL*1024ULL }, | |
2166 | { "K", 1024ULL }, | |
2167 | { "B", 1 }, | |
ab1f0633 LP |
2168 | { "", 1 }, |
2169 | }; | |
2170 | ||
5556b5fe | 2171 | static const struct table si[] = { |
5556b5fe | 2172 | { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
840292be ZJS |
2173 | { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
2174 | { "T", 1000ULL*1000ULL*1000ULL*1000ULL }, | |
2175 | { "G", 1000ULL*1000ULL*1000ULL }, | |
2176 | { "M", 1000ULL*1000ULL }, | |
2177 | { "K", 1000ULL }, | |
2178 | { "B", 1 }, | |
5556b5fe LP |
2179 | { "", 1 }, |
2180 | }; | |
2181 | ||
2182 | const struct table *table; | |
ab1f0633 | 2183 | const char *p; |
b32ff512 | 2184 | unsigned long long r = 0; |
840292be | 2185 | unsigned n_entries, start_pos = 0; |
ab1f0633 LP |
2186 | |
2187 | assert(t); | |
5556b5fe LP |
2188 | assert(base == 1000 || base == 1024); |
2189 | assert(size); | |
2190 | ||
2191 | if (base == 1000) { | |
2192 | table = si; | |
2193 | n_entries = ELEMENTSOF(si); | |
2194 | } else { | |
2195 | table = iec; | |
2196 | n_entries = ELEMENTSOF(iec); | |
2197 | } | |
ab1f0633 LP |
2198 | |
2199 | p = t; | |
2200 | do { | |
2201 | long long l; | |
9480794b ZJS |
2202 | unsigned long long l2; |
2203 | double frac = 0; | |
ab1f0633 LP |
2204 | char *e; |
2205 | unsigned i; | |
2206 | ||
2207 | errno = 0; | |
2208 | l = strtoll(p, &e, 10); | |
2209 | ||
8333c77e | 2210 | if (errno > 0) |
ab1f0633 LP |
2211 | return -errno; |
2212 | ||
2213 | if (l < 0) | |
2214 | return -ERANGE; | |
2215 | ||
2216 | if (e == p) | |
2217 | return -EINVAL; | |
2218 | ||
9480794b ZJS |
2219 | if (*e == '.') { |
2220 | e++; | |
2221 | if (*e >= '0' && *e <= '9') { | |
2222 | char *e2; | |
2223 | ||
2224 | /* strotoull itself would accept space/+/- */ | |
2225 | l2 = strtoull(e, &e2, 10); | |
2226 | ||
2227 | if (errno == ERANGE) | |
2228 | return -errno; | |
2229 | ||
2230 | /* Ignore failure. E.g. 10.M is valid */ | |
2231 | frac = l2; | |
2232 | for (; e < e2; e++) | |
2233 | frac /= 10; | |
2234 | } | |
2235 | } | |
2236 | ||
ab1f0633 LP |
2237 | e += strspn(e, WHITESPACE); |
2238 | ||
840292be | 2239 | for (i = start_pos; i < n_entries; i++) |
ab1f0633 | 2240 | if (startswith(e, table[i].suffix)) { |
b32ff512 | 2241 | unsigned long long tmp; |
9480794b | 2242 | if ((unsigned long long) l + (frac > 0) > ULLONG_MAX / table[i].factor) |
b32ff512 | 2243 | return -ERANGE; |
9480794b | 2244 | tmp = l * table[i].factor + (unsigned long long) (frac * table[i].factor); |
b32ff512 ZJS |
2245 | if (tmp > ULLONG_MAX - r) |
2246 | return -ERANGE; | |
2247 | ||
2248 | r += tmp; | |
2249 | if ((unsigned long long) (off_t) r != r) | |
2250 | return -ERANGE; | |
2251 | ||
ab1f0633 | 2252 | p = e + strlen(table[i].suffix); |
840292be ZJS |
2253 | |
2254 | start_pos = i + 1; | |
ab1f0633 LP |
2255 | break; |
2256 | } | |
2257 | ||
5556b5fe | 2258 | if (i >= n_entries) |
ab1f0633 LP |
2259 | return -EINVAL; |
2260 | ||
b32ff512 | 2261 | } while (*p); |
ab1f0633 | 2262 | |
5556b5fe | 2263 | *size = r; |
ab1f0633 LP |
2264 | |
2265 | return 0; | |
2266 | } | |
2267 | ||
843d2643 LP |
2268 | int make_stdio(int fd) { |
2269 | int r, s, t; | |
2270 | ||
2271 | assert(fd >= 0); | |
2272 | ||
73836c5c LP |
2273 | r = dup3(fd, STDIN_FILENO, 0); |
2274 | s = dup3(fd, STDOUT_FILENO, 0); | |
2275 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2276 | |
2277 | if (fd >= 3) | |
2278 | close_nointr_nofail(fd); | |
2279 | ||
2280 | if (r < 0 || s < 0 || t < 0) | |
2281 | return -errno; | |
2282 | ||
73836c5c | 2283 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2284 | |
843d2643 LP |
2285 | return 0; |
2286 | } | |
2287 | ||
ade509ce LP |
2288 | int make_null_stdio(void) { |
2289 | int null_fd; | |
2290 | ||
cd3bd60a LP |
2291 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2292 | if (null_fd < 0) | |
ade509ce LP |
2293 | return -errno; |
2294 | ||
2295 | return make_stdio(null_fd); | |
2296 | } | |
2297 | ||
8407a5d0 LP |
2298 | bool is_device_path(const char *path) { |
2299 | ||
2300 | /* Returns true on paths that refer to a device, either in | |
2301 | * sysfs or in /dev */ | |
2302 | ||
2303 | return | |
2304 | path_startswith(path, "/dev/") || | |
2305 | path_startswith(path, "/sys/"); | |
2306 | } | |
2307 | ||
01f78473 | 2308 | int dir_is_empty(const char *path) { |
a05f97b3 | 2309 | _cleanup_closedir_ DIR *d; |
01f78473 | 2310 | |
a05f97b3 LP |
2311 | d = opendir(path); |
2312 | if (!d) | |
01f78473 LP |
2313 | return -errno; |
2314 | ||
2315 | for (;;) { | |
7d5e9c0f | 2316 | struct dirent *de; |
01f78473 | 2317 | |
3fd11280 FW |
2318 | errno = 0; |
2319 | de = readdir(d); | |
2320 | if (!de && errno != 0) | |
2321 | return -errno; | |
01f78473 | 2322 | |
a05f97b3 LP |
2323 | if (!de) |
2324 | return 1; | |
01f78473 | 2325 | |
a05f97b3 LP |
2326 | if (!ignore_file(de->d_name)) |
2327 | return 0; | |
2328 | } | |
01f78473 LP |
2329 | } |
2330 | ||
844ec79b ZJS |
2331 | char* dirname_malloc(const char *path) { |
2332 | char *d, *dir, *dir2; | |
2333 | ||
2334 | d = strdup(path); | |
2335 | if (!d) | |
2336 | return NULL; | |
2337 | dir = dirname(d); | |
2338 | assert(dir); | |
2339 | ||
2340 | if (dir != d) { | |
2341 | dir2 = strdup(dir); | |
2342 | free(d); | |
2343 | return dir2; | |
2344 | } | |
2345 | ||
2346 | return dir; | |
2347 | } | |
2348 | ||
b89446bb | 2349 | int dev_urandom(void *p, size_t n) { |
a05f97b3 | 2350 | _cleanup_close_ int fd; |
9bf3b535 | 2351 | ssize_t k; |
d3782d60 | 2352 | |
ac0930c8 LP |
2353 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2354 | if (fd < 0) | |
b89446bb | 2355 | return errno == ENOENT ? -ENOSYS : -errno; |
d3782d60 | 2356 | |
9bf3b535 | 2357 | k = loop_read(fd, p, n, true); |
b89446bb LP |
2358 | if (k < 0) |
2359 | return (int) k; | |
2360 | if ((size_t) k != n) | |
2361 | return -EIO; | |
2362 | ||
2363 | return 0; | |
2364 | } | |
2365 | ||
2366 | void random_bytes(void *p, size_t n) { | |
2367 | static bool srand_called = false; | |
2368 | uint8_t *q; | |
2369 | int r; | |
d3782d60 | 2370 | |
b89446bb LP |
2371 | r = dev_urandom(p, n); |
2372 | if (r >= 0) | |
2373 | return; | |
d3782d60 | 2374 | |
b89446bb LP |
2375 | /* If some idiot made /dev/urandom unavailable to us, he'll |
2376 | * get a PRNG instead. */ | |
d3782d60 | 2377 | |
9bf3b535 | 2378 | if (!srand_called) { |
b89446bb | 2379 | unsigned x = 0; |
a3b6fafe | 2380 | |
9bf3b535 LP |
2381 | #ifdef HAVE_SYS_AUXV_H |
2382 | /* The kernel provides us with a bit of entropy in | |
2383 | * auxv, so let's try to make use of that to seed the | |
2384 | * pseudo-random generator. It's better than | |
2385 | * nothing... */ | |
a3b6fafe | 2386 | |
9bf3b535 LP |
2387 | void *auxv; |
2388 | ||
2389 | auxv = (void*) getauxval(AT_RANDOM); | |
2390 | if (auxv) | |
b89446bb | 2391 | x ^= *(unsigned*) auxv; |
9bf3b535 | 2392 | #endif |
a3b6fafe | 2393 | |
b89446bb LP |
2394 | x ^= (unsigned) now(CLOCK_REALTIME); |
2395 | x ^= (unsigned) gettid(); | |
2396 | ||
2397 | srand(x); | |
9bf3b535 LP |
2398 | srand_called = true; |
2399 | } | |
a3b6fafe | 2400 | |
9bf3b535 LP |
2401 | for (q = p; q < (uint8_t*) p + n; q ++) |
2402 | *q = rand(); | |
a3b6fafe LP |
2403 | } |
2404 | ||
5b6319dc LP |
2405 | void rename_process(const char name[8]) { |
2406 | assert(name); | |
2407 | ||
5d6b1584 LP |
2408 | /* This is a like a poor man's setproctitle(). It changes the |
2409 | * comm field, argv[0], and also the glibc's internally used | |
2410 | * name of the process. For the first one a limit of 16 chars | |
2411 | * applies, to the second one usually one of 10 (i.e. length | |
2412 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2413 | * "systemd"). If you pass a longer string it will be | |
2414 | * truncated */ | |
5b6319dc | 2415 | |
5d6b1584 | 2416 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2417 | |
2418 | if (program_invocation_name) | |
2419 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2420 | |
2421 | if (saved_argc > 0) { | |
2422 | int i; | |
2423 | ||
2424 | if (saved_argv[0]) | |
2425 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2426 | ||
2427 | for (i = 1; i < saved_argc; i++) { | |
2428 | if (!saved_argv[i]) | |
2429 | break; | |
2430 | ||
29804cc1 | 2431 | memzero(saved_argv[i], strlen(saved_argv[i])); |
9a0e6896 LP |
2432 | } |
2433 | } | |
5b6319dc LP |
2434 | } |
2435 | ||
7d793605 LP |
2436 | void sigset_add_many(sigset_t *ss, ...) { |
2437 | va_list ap; | |
2438 | int sig; | |
2439 | ||
2440 | assert(ss); | |
2441 | ||
2442 | va_start(ap, ss); | |
2443 | while ((sig = va_arg(ap, int)) > 0) | |
2444 | assert_se(sigaddset(ss, sig) == 0); | |
2445 | va_end(ap); | |
2446 | } | |
2447 | ||
ef2f1067 LP |
2448 | char* gethostname_malloc(void) { |
2449 | struct utsname u; | |
2450 | ||
2451 | assert_se(uname(&u) >= 0); | |
2452 | ||
344de609 | 2453 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2454 | return strdup(u.nodename); |
2455 | ||
2456 | return strdup(u.sysname); | |
2457 | } | |
2458 | ||
344de609 LP |
2459 | bool hostname_is_set(void) { |
2460 | struct utsname u; | |
2461 | ||
2462 | assert_se(uname(&u) >= 0); | |
2463 | ||
2464 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2465 | } | |
2466 | ||
7c5f152a | 2467 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2468 | long bufsize; |
a05f97b3 LP |
2469 | char *name; |
2470 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2471 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2472 | |
2473 | /* Shortcut things to avoid NSS lookups */ | |
2474 | if (uid == 0) | |
2475 | return strdup("root"); | |
2476 | ||
7c5f152a LP |
2477 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2478 | if (bufsize <= 0) | |
ef2f1067 LP |
2479 | bufsize = 4096; |
2480 | ||
7c5f152a LP |
2481 | buf = malloc(bufsize); |
2482 | if (!buf) | |
ef2f1067 LP |
2483 | return NULL; |
2484 | ||
a05f97b3 LP |
2485 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2486 | return strdup(pw->pw_name); | |
ef2f1067 LP |
2487 | |
2488 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
2489 | return NULL; | |
2490 | ||
2491 | return name; | |
2492 | } | |
2493 | ||
7c5f152a LP |
2494 | char* getlogname_malloc(void) { |
2495 | uid_t uid; | |
2496 | struct stat st; | |
2497 | ||
2498 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2499 | uid = st.st_uid; | |
2500 | else | |
2501 | uid = getuid(); | |
2502 | ||
2503 | return lookup_uid(uid); | |
2504 | } | |
2505 | ||
2506 | char *getusername_malloc(void) { | |
2507 | const char *e; | |
2508 | ||
2509 | e = getenv("USER"); | |
2510 | if (e) | |
2511 | return strdup(e); | |
2512 | ||
2513 | return lookup_uid(getuid()); | |
2514 | } | |
2515 | ||
fc116c6a LP |
2516 | int getttyname_malloc(int fd, char **r) { |
2517 | char path[PATH_MAX], *c; | |
618e02c7 | 2518 | int k; |
8c6db833 LP |
2519 | |
2520 | assert(r); | |
ef2f1067 | 2521 | |
a05f97b3 | 2522 | k = ttyname_r(fd, path, sizeof(path)); |
27373e44 | 2523 | if (k > 0) |
618e02c7 | 2524 | return -k; |
ef2f1067 LP |
2525 | |
2526 | char_array_0(path); | |
2527 | ||
a05f97b3 LP |
2528 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2529 | if (!c) | |
8c6db833 LP |
2530 | return -ENOMEM; |
2531 | ||
2532 | *r = c; | |
2533 | return 0; | |
2534 | } | |
2535 | ||
fc116c6a LP |
2536 | int getttyname_harder(int fd, char **r) { |
2537 | int k; | |
2538 | char *s; | |
2539 | ||
a05f97b3 LP |
2540 | k = getttyname_malloc(fd, &s); |
2541 | if (k < 0) | |
fc116c6a LP |
2542 | return k; |
2543 | ||
2544 | if (streq(s, "tty")) { | |
2545 | free(s); | |
4d6d6518 | 2546 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2547 | } |
2548 | ||
2549 | *r = s; | |
2550 | return 0; | |
2551 | } | |
2552 | ||
4d6d6518 | 2553 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
b4696bce SP |
2554 | int r; |
2555 | _cleanup_free_ char *line = NULL; | |
2556 | const char *p; | |
fc116c6a | 2557 | unsigned long ttynr; |
fc116c6a | 2558 | |
49aa47c7 | 2559 | assert(pid >= 0); |
49aa47c7 | 2560 | |
b4696bce SP |
2561 | p = procfs_file_alloca(pid, "stat"); |
2562 | r = read_one_line_file(p, &line); | |
2563 | if (r < 0) | |
2564 | return r; | |
fc116c6a | 2565 | |
4d6d6518 LP |
2566 | p = strrchr(line, ')'); |
2567 | if (!p) | |
fc116c6a LP |
2568 | return -EIO; |
2569 | ||
2570 | p++; | |
2571 | ||
2572 | if (sscanf(p, " " | |
2573 | "%*c " /* state */ | |
2574 | "%*d " /* ppid */ | |
2575 | "%*d " /* pgrp */ | |
2576 | "%*d " /* session */ | |
2577 | "%lu ", /* ttynr */ | |
2578 | &ttynr) != 1) | |
2579 | return -EIO; | |
2580 | ||
11dc5d2b LP |
2581 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2582 | return -ENOENT; | |
2583 | ||
0bee65f0 LP |
2584 | if (d) |
2585 | *d = (dev_t) ttynr; | |
2586 | ||
fc116c6a LP |
2587 | return 0; |
2588 | } | |
2589 | ||
4d6d6518 | 2590 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
833fce28 LP |
2591 | char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *b = NULL; |
2592 | _cleanup_free_ char *s = NULL; | |
2593 | const char *p; | |
fc116c6a | 2594 | dev_t devnr; |
833fce28 | 2595 | int k; |
fc116c6a LP |
2596 | |
2597 | assert(r); | |
2598 | ||
4d6d6518 LP |
2599 | k = get_ctty_devnr(pid, &devnr); |
2600 | if (k < 0) | |
fc116c6a LP |
2601 | return k; |
2602 | ||
2603 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
fc116c6a | 2604 | |
23406ce5 LP |
2605 | k = readlink_malloc(fn, &s); |
2606 | if (k < 0) { | |
fc116c6a LP |
2607 | |
2608 | if (k != -ENOENT) | |
2609 | return k; | |
2610 | ||
46824d0e LP |
2611 | /* This is an ugly hack */ |
2612 | if (major(devnr) == 136) { | |
833fce28 LP |
2613 | asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)); |
2614 | goto finish; | |
46824d0e LP |
2615 | } |
2616 | ||
fc116c6a LP |
2617 | /* Probably something like the ptys which have no |
2618 | * symlink in /dev/char. Let's return something | |
2619 | * vaguely useful. */ | |
2620 | ||
23406ce5 | 2621 | b = strdup(fn + 5); |
833fce28 | 2622 | goto finish; |
fc116c6a LP |
2623 | } |
2624 | ||
2625 | if (startswith(s, "/dev/")) | |
2626 | p = s + 5; | |
2627 | else if (startswith(s, "../")) | |
2628 | p = s + 3; | |
2629 | else | |
2630 | p = s; | |
2631 | ||
2632 | b = strdup(p); | |
fc116c6a | 2633 | |
833fce28 | 2634 | finish: |
fc116c6a LP |
2635 | if (!b) |
2636 | return -ENOMEM; | |
2637 | ||
2638 | *r = b; | |
46824d0e LP |
2639 | if (_devnr) |
2640 | *_devnr = devnr; | |
2641 | ||
fc116c6a LP |
2642 | return 0; |
2643 | } | |
2644 | ||
f56d5db9 | 2645 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
2646 | DIR *d; |
2647 | int ret = 0; | |
2648 | ||
2649 | assert(fd >= 0); | |
2650 | ||
2651 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2652 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2653 | |
d4d046e3 LP |
2654 | d = fdopendir(fd); |
2655 | if (!d) { | |
8c6db833 | 2656 | close_nointr_nofail(fd); |
4c633005 LP |
2657 | |
2658 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2659 | } |
2660 | ||
2661 | for (;;) { | |
7d5e9c0f | 2662 | struct dirent *de; |
7925c22a LP |
2663 | bool is_dir, keep_around; |
2664 | struct stat st; | |
8c6db833 LP |
2665 | int r; |
2666 | ||
3fd11280 FW |
2667 | errno = 0; |
2668 | de = readdir(d); | |
2669 | if (!de && errno != 0) { | |
2670 | if (ret == 0) | |
2671 | ret = -errno; | |
8c6db833 LP |
2672 | break; |
2673 | } | |
2674 | ||
2675 | if (!de) | |
2676 | break; | |
2677 | ||
2678 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
2679 | continue; | |
2680 | ||
7925c22a LP |
2681 | if (de->d_type == DT_UNKNOWN || |
2682 | honour_sticky || | |
2683 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2684 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2685 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2686 | ret = -errno; |
2687 | continue; | |
2688 | } | |
2689 | ||
2690 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2691 | keep_around = |
2692 | honour_sticky && | |
2693 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2694 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2695 | } else { |
8c6db833 | 2696 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2697 | keep_around = false; |
ad293f5a | 2698 | } |
8c6db833 LP |
2699 | |
2700 | if (is_dir) { | |
2701 | int subdir_fd; | |
8c6db833 | 2702 | |
597f43c7 | 2703 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
2704 | if (root_dev && st.st_dev != root_dev->st_dev) |
2705 | continue; | |
8c6db833 | 2706 | |
7925c22a LP |
2707 | subdir_fd = openat(fd, de->d_name, |
2708 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
2709 | if (subdir_fd < 0) { | |
2710 | if (ret == 0 && errno != ENOENT) | |
2711 | ret = -errno; | |
2712 | continue; | |
2713 | } | |
2714 | ||
b3d28469 | 2715 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
2716 | if (r < 0 && ret == 0) |
2717 | ret = r; | |
2718 | ||
2719 | if (!keep_around) | |
2720 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
2721 | if (ret == 0 && errno != ENOENT) |
2722 | ret = -errno; | |
2723 | } | |
2724 | ||
2725 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
2726 | |
2727 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 2728 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2729 | ret = -errno; |
2730 | } | |
2731 | } | |
2732 | } | |
2733 | ||
2734 | closedir(d); | |
2735 | ||
2736 | return ret; | |
2737 | } | |
2738 | ||
44a6b1b6 | 2739 | _pure_ static int is_temporary_fs(struct statfs *s) { |
943aad8c | 2740 | assert(s); |
73020ab2 SL |
2741 | |
2742 | return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) || | |
2743 | F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC); | |
943aad8c ZJS |
2744 | } |
2745 | ||
f56d5db9 LP |
2746 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
2747 | struct statfs s; | |
2748 | ||
2749 | assert(fd >= 0); | |
2750 | ||
2751 | if (fstatfs(fd, &s) < 0) { | |
2752 | close_nointr_nofail(fd); | |
2753 | return -errno; | |
2754 | } | |
2755 | ||
2756 | /* We refuse to clean disk file systems with this call. This | |
2757 | * is extra paranoia just to be sure we never ever remove | |
2758 | * non-state data */ | |
943aad8c | 2759 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2760 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2761 | close_nointr_nofail(fd); | |
2762 | return -EPERM; | |
2763 | } | |
2764 | ||
2765 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
2766 | } | |
2767 | ||
2768 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
2769 | int fd, r; | |
2770 | struct statfs s; | |
8c6db833 LP |
2771 | |
2772 | assert(path); | |
2773 | ||
f56d5db9 LP |
2774 | /* We refuse to clean the root file system with this |
2775 | * call. This is extra paranoia to never cause a really | |
2776 | * seriously broken system. */ | |
2777 | if (path_equal(path, "/")) { | |
2778 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
2779 | return -EPERM; | |
2780 | } | |
461b1822 | 2781 | |
d4d046e3 LP |
2782 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
2783 | if (fd < 0) { | |
8c6db833 LP |
2784 | |
2785 | if (errno != ENOTDIR) | |
2786 | return -errno; | |
2787 | ||
f56d5db9 LP |
2788 | if (!dangerous) { |
2789 | if (statfs(path, &s) < 0) | |
2790 | return -errno; | |
2791 | ||
943aad8c | 2792 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2793 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2794 | return -EPERM; | |
2795 | } | |
2796 | } | |
2797 | ||
8c6db833 | 2798 | if (delete_root && !only_dirs) |
d4d046e3 | 2799 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
2800 | return -errno; |
2801 | ||
2802 | return 0; | |
2803 | } | |
2804 | ||
f56d5db9 LP |
2805 | if (!dangerous) { |
2806 | if (fstatfs(fd, &s) < 0) { | |
2807 | close_nointr_nofail(fd); | |
2808 | return -errno; | |
2809 | } | |
ad293f5a | 2810 | |
943aad8c | 2811 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2812 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2813 | close_nointr_nofail(fd); | |
2814 | return -EPERM; | |
2815 | } | |
2816 | } | |
2817 | ||
2818 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
2819 | if (delete_root) { |
2820 | ||
8d53b453 | 2821 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 2822 | return r; |
8c6db833 | 2823 | |
e27796a0 | 2824 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
2825 | if (r == 0) |
2826 | r = -errno; | |
2827 | } | |
ad293f5a | 2828 | } |
8c6db833 LP |
2829 | |
2830 | return r; | |
2831 | } | |
2832 | ||
f56d5db9 LP |
2833 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
2834 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
2835 | } | |
2836 | ||
2837 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
2838 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
2839 | } | |
2840 | ||
8c6db833 LP |
2841 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
2842 | assert(path); | |
2843 | ||
2844 | /* Under the assumption that we are running privileged we | |
2845 | * first change the access mode and only then hand out | |
2846 | * ownership to avoid a window where access is too open. */ | |
2847 | ||
8d53b453 LP |
2848 | if (mode != (mode_t) -1) |
2849 | if (chmod(path, mode) < 0) | |
2850 | return -errno; | |
8c6db833 | 2851 | |
8d53b453 LP |
2852 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2853 | if (chown(path, uid, gid) < 0) | |
2854 | return -errno; | |
8c6db833 LP |
2855 | |
2856 | return 0; | |
ef2f1067 LP |
2857 | } |
2858 | ||
f4b47811 LP |
2859 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
2860 | assert(fd >= 0); | |
2861 | ||
2862 | /* Under the assumption that we are running privileged we | |
2863 | * first change the access mode and only then hand out | |
2864 | * ownership to avoid a window where access is too open. */ | |
2865 | ||
9588bc32 LP |
2866 | if (mode != (mode_t) -1) |
2867 | if (fchmod(fd, mode) < 0) | |
2868 | return -errno; | |
f4b47811 | 2869 | |
9588bc32 LP |
2870 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2871 | if (fchown(fd, uid, gid) < 0) | |
2872 | return -errno; | |
f4b47811 LP |
2873 | |
2874 | return 0; | |
2875 | } | |
2876 | ||
82c121a4 LP |
2877 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2878 | cpu_set_t *r; | |
2879 | unsigned n = 1024; | |
2880 | ||
2881 | /* Allocates the cpuset in the right size */ | |
2882 | ||
2883 | for (;;) { | |
2884 | if (!(r = CPU_ALLOC(n))) | |
2885 | return NULL; | |
2886 | ||
2887 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2888 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2889 | ||
2890 | if (ncpus) | |
2891 | *ncpus = n; | |
2892 | ||
2893 | return r; | |
2894 | } | |
2895 | ||
2896 | CPU_FREE(r); | |
2897 | ||
2898 | if (errno != EINVAL) | |
2899 | return NULL; | |
2900 | ||
2901 | n *= 2; | |
2902 | } | |
2903 | } | |
2904 | ||
984a2be4 | 2905 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) { |
9ab7a8d2 | 2906 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
2907 | _cleanup_free_ char *s = NULL; |
2908 | _cleanup_close_ int fd = -1; | |
b92bea5d | 2909 | struct iovec iovec[6] = {}; |
81beb750 | 2910 | int n = 0; |
984a2be4 | 2911 | static bool prev_ephemeral; |
9e58ff9c LP |
2912 | |
2913 | assert(format); | |
2914 | ||
9ab7a8d2 | 2915 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
2916 | * optional and go exclusively to the console. */ |
2917 | ||
2918 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 2919 | return log_oom(); |
9e58ff9c | 2920 | |
67e5cc4f | 2921 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 2922 | if (fd < 0) |
669bec5d | 2923 | return fd; |
9e58ff9c | 2924 | |
67e5cc4f | 2925 | if (ellipse) { |
9ab7a8d2 MS |
2926 | char *e; |
2927 | size_t emax, sl; | |
2928 | int c; | |
2929 | ||
67e5cc4f LP |
2930 | c = fd_columns(fd); |
2931 | if (c <= 0) | |
2932 | c = 80; | |
81beb750 | 2933 | |
669bec5d | 2934 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
2935 | |
2936 | emax = c - sl - 1; | |
2937 | if (emax < 3) | |
2938 | emax = 3; | |
81beb750 | 2939 | |
67e5cc4f LP |
2940 | e = ellipsize(s, emax, 75); |
2941 | if (e) { | |
2942 | free(s); | |
2943 | s = e; | |
2944 | } | |
81beb750 LP |
2945 | } |
2946 | ||
984a2be4 MS |
2947 | if (prev_ephemeral) |
2948 | IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE); | |
2949 | prev_ephemeral = ephemeral; | |
2950 | ||
9ab7a8d2 MS |
2951 | if (status) { |
2952 | if (!isempty(status)) { | |
2953 | IOVEC_SET_STRING(iovec[n++], "["); | |
2954 | IOVEC_SET_STRING(iovec[n++], status); | |
2955 | IOVEC_SET_STRING(iovec[n++], "] "); | |
2956 | } else | |
2957 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
2958 | } |
2959 | ||
9ab7a8d2 | 2960 | IOVEC_SET_STRING(iovec[n++], s); |
984a2be4 MS |
2961 | if (!ephemeral) |
2962 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 2963 | |
669bec5d LP |
2964 | if (writev(fd, iovec, n) < 0) |
2965 | return -errno; | |
9e58ff9c | 2966 | |
669bec5d | 2967 | return 0; |
9e58ff9c LP |
2968 | } |
2969 | ||
984a2be4 | 2970 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) { |
c846ff47 | 2971 | va_list ap; |
669bec5d | 2972 | int r; |
c846ff47 LP |
2973 | |
2974 | assert(format); | |
2975 | ||
2976 | va_start(ap, format); | |
984a2be4 | 2977 | r = status_vprintf(status, ellipse, ephemeral, format, ap); |
c846ff47 | 2978 | va_end(ap); |
669bec5d LP |
2979 | |
2980 | return r; | |
c846ff47 LP |
2981 | } |
2982 | ||
fab56fc5 LP |
2983 | char *replace_env(const char *format, char **env) { |
2984 | enum { | |
2985 | WORD, | |
c24eb49e | 2986 | CURLY, |
fab56fc5 LP |
2987 | VARIABLE |
2988 | } state = WORD; | |
2989 | ||
2990 | const char *e, *word = format; | |
2991 | char *r = NULL, *k; | |
2992 | ||
2993 | assert(format); | |
2994 | ||
2995 | for (e = format; *e; e ++) { | |
2996 | ||
2997 | switch (state) { | |
2998 | ||
2999 | case WORD: | |
3000 | if (*e == '$') | |
c24eb49e | 3001 | state = CURLY; |
fab56fc5 LP |
3002 | break; |
3003 | ||
c24eb49e LP |
3004 | case CURLY: |
3005 | if (*e == '{') { | |
fab56fc5 LP |
3006 | if (!(k = strnappend(r, word, e-word-1))) |
3007 | goto fail; | |
3008 | ||
3009 | free(r); | |
3010 | r = k; | |
3011 | ||
3012 | word = e-1; | |
3013 | state = VARIABLE; | |
3014 | ||
3015 | } else if (*e == '$') { | |
3016 | if (!(k = strnappend(r, word, e-word))) | |
3017 | goto fail; | |
3018 | ||
3019 | free(r); | |
3020 | r = k; | |
3021 | ||
3022 | word = e+1; | |
3023 | state = WORD; | |
3024 | } else | |
3025 | state = WORD; | |
3026 | break; | |
3027 | ||
3028 | case VARIABLE: | |
c24eb49e | 3029 | if (*e == '}') { |
b95cf362 | 3030 | const char *t; |
fab56fc5 | 3031 | |
4d1a6904 | 3032 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 3033 | |
4d1a6904 LP |
3034 | k = strappend(r, t); |
3035 | if (!k) | |
b95cf362 | 3036 | goto fail; |
fab56fc5 | 3037 | |
b95cf362 LP |
3038 | free(r); |
3039 | r = k; | |
fab56fc5 | 3040 | |
b95cf362 | 3041 | word = e+1; |
fab56fc5 LP |
3042 | state = WORD; |
3043 | } | |
3044 | break; | |
3045 | } | |
3046 | } | |
3047 | ||
3048 | if (!(k = strnappend(r, word, e-word))) | |
3049 | goto fail; | |
3050 | ||
3051 | free(r); | |
3052 | return k; | |
3053 | ||
3054 | fail: | |
3055 | free(r); | |
3056 | return NULL; | |
3057 | } | |
3058 | ||
3059 | char **replace_env_argv(char **argv, char **env) { | |
3060 | char **r, **i; | |
c24eb49e LP |
3061 | unsigned k = 0, l = 0; |
3062 | ||
3063 | l = strv_length(argv); | |
fab56fc5 | 3064 | |
c24eb49e | 3065 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3066 | return NULL; |
3067 | ||
3068 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3069 | |
3070 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3071 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3072 | char *e; | |
3073 | char **w, **m; | |
3074 | unsigned q; | |
c24eb49e | 3075 | |
4d1a6904 LP |
3076 | e = strv_env_get(env, *i+1); |
3077 | if (e) { | |
c24eb49e LP |
3078 | |
3079 | if (!(m = strv_split_quoted(e))) { | |
3080 | r[k] = NULL; | |
3081 | strv_free(r); | |
3082 | return NULL; | |
3083 | } | |
b95cf362 LP |
3084 | } else |
3085 | m = NULL; | |
c24eb49e | 3086 | |
b95cf362 LP |
3087 | q = strv_length(m); |
3088 | l = l + q - 1; | |
c24eb49e | 3089 | |
b95cf362 LP |
3090 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3091 | r[k] = NULL; | |
3092 | strv_free(r); | |
3093 | strv_free(m); | |
3094 | return NULL; | |
3095 | } | |
c24eb49e | 3096 | |
b95cf362 LP |
3097 | r = w; |
3098 | if (m) { | |
c24eb49e LP |
3099 | memcpy(r + k, m, q * sizeof(char*)); |
3100 | free(m); | |
c24eb49e | 3101 | } |
b95cf362 LP |
3102 | |
3103 | k += q; | |
3104 | continue; | |
c24eb49e LP |
3105 | } |
3106 | ||
3107 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3108 | if (!(r[k++] = replace_env(*i, env))) { |
3109 | strv_free(r); | |
3110 | return NULL; | |
3111 | } | |
3112 | } | |
3113 | ||
3114 | r[k] = NULL; | |
3115 | return r; | |
3116 | } | |
3117 | ||
81beb750 | 3118 | int fd_columns(int fd) { |
b92bea5d | 3119 | struct winsize ws = {}; |
81beb750 LP |
3120 | |
3121 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3122 | return -errno; | |
3123 | ||
3124 | if (ws.ws_col <= 0) | |
3125 | return -EIO; | |
3126 | ||
3127 | return ws.ws_col; | |
3128 | } | |
3129 | ||
28917d7d | 3130 | unsigned columns(void) { |
fa776d8e | 3131 | const char *e; |
7009eec2 | 3132 | int c; |
fa776d8e | 3133 | |
28917d7d LP |
3134 | if (_likely_(cached_columns > 0)) |
3135 | return cached_columns; | |
11f96fac | 3136 | |
28917d7d LP |
3137 | c = 0; |
3138 | e = getenv("COLUMNS"); | |
3139 | if (e) | |
7009eec2 | 3140 | safe_atoi(e, &c); |
fa776d8e | 3141 | |
28917d7d LP |
3142 | if (c <= 0) |
3143 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3144 | |
28917d7d LP |
3145 | if (c <= 0) |
3146 | c = 80; | |
11f96fac | 3147 | |
28917d7d LP |
3148 | cached_columns = c; |
3149 | return c; | |
11f96fac ZJS |
3150 | } |
3151 | ||
8f2d43a0 | 3152 | int fd_lines(int fd) { |
b92bea5d | 3153 | struct winsize ws = {}; |
8f2d43a0 LP |
3154 | |
3155 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3156 | return -errno; | |
3157 | ||
3158 | if (ws.ws_row <= 0) | |
3159 | return -EIO; | |
3160 | ||
3161 | return ws.ws_row; | |
3162 | } | |
3163 | ||
3164 | unsigned lines(void) { | |
8f2d43a0 | 3165 | const char *e; |
ed757c0c | 3166 | unsigned l; |
8f2d43a0 | 3167 | |
ed757c0c LP |
3168 | if (_likely_(cached_lines > 0)) |
3169 | return cached_lines; | |
8f2d43a0 | 3170 | |
ed757c0c | 3171 | l = 0; |
8f2d43a0 LP |
3172 | e = getenv("LINES"); |
3173 | if (e) | |
ed757c0c | 3174 | safe_atou(e, &l); |
8f2d43a0 | 3175 | |
ed757c0c LP |
3176 | if (l <= 0) |
3177 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3178 | |
ed757c0c LP |
3179 | if (l <= 0) |
3180 | l = 24; | |
8f2d43a0 | 3181 | |
ed757c0c LP |
3182 | cached_lines = l; |
3183 | return cached_lines; | |
3184 | } | |
3185 | ||
3186 | /* intended to be used as a SIGWINCH sighandler */ | |
3187 | void columns_lines_cache_reset(int signum) { | |
3188 | cached_columns = 0; | |
3189 | cached_lines = 0; | |
3190 | } | |
3191 | ||
3192 | bool on_tty(void) { | |
3193 | static int cached_on_tty = -1; | |
3194 | ||
3195 | if (_unlikely_(cached_on_tty < 0)) | |
3196 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3197 | ||
3198 | return cached_on_tty; | |
8f2d43a0 LP |
3199 | } |
3200 | ||
b4f10a5e | 3201 | int running_in_chroot(void) { |
b92bea5d | 3202 | struct stat a = {}, b = {}; |
b4f10a5e LP |
3203 | |
3204 | /* Only works as root */ | |
b4f10a5e LP |
3205 | if (stat("/proc/1/root", &a) < 0) |
3206 | return -errno; | |
3207 | ||
3208 | if (stat("/", &b) < 0) | |
3209 | return -errno; | |
3210 | ||
3211 | return | |
3212 | a.st_dev != b.st_dev || | |
3213 | a.st_ino != b.st_ino; | |
3214 | } | |
3215 | ||
f405e86d | 3216 | static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
72f59706 | 3217 | size_t x; |
8fe914ec LP |
3218 | char *r; |
3219 | ||
3220 | assert(s); | |
3221 | assert(percent <= 100); | |
72f59706 | 3222 | assert(new_length >= 3); |
8fe914ec | 3223 | |
72f59706 LP |
3224 | if (old_length <= 3 || old_length <= new_length) |
3225 | return strndup(s, old_length); | |
8fe914ec | 3226 | |
72f59706 LP |
3227 | r = new0(char, new_length+1); |
3228 | if (!r) | |
a6f0104a | 3229 | return NULL; |
8fe914ec | 3230 | |
72f59706 | 3231 | x = (new_length * percent) / 100; |
8fe914ec | 3232 | |
72f59706 LP |
3233 | if (x > new_length - 3) |
3234 | x = new_length - 3; | |
8fe914ec LP |
3235 | |
3236 | memcpy(r, s, x); | |
3237 | r[x] = '.'; | |
3238 | r[x+1] = '.'; | |
3239 | r[x+2] = '.'; | |
3240 | memcpy(r + x + 3, | |
72f59706 LP |
3241 | s + old_length - (new_length - x - 3), |
3242 | new_length - x - 3); | |
8fe914ec LP |
3243 | |
3244 | return r; | |
3245 | } | |
3246 | ||
f405e86d SL |
3247 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3248 | size_t x; | |
3249 | char *e; | |
3250 | const char *i, *j; | |
3251 | unsigned k, len, len2; | |
3252 | ||
3253 | assert(s); | |
3254 | assert(percent <= 100); | |
3255 | assert(new_length >= 3); | |
3256 | ||
3257 | /* if no multibyte characters use ascii_ellipsize_mem for speed */ | |
3258 | if (ascii_is_valid(s)) | |
3259 | return ascii_ellipsize_mem(s, old_length, new_length, percent); | |
3260 | ||
3261 | if (old_length <= 3 || old_length <= new_length) | |
3262 | return strndup(s, old_length); | |
3263 | ||
3264 | x = (new_length * percent) / 100; | |
3265 | ||
3266 | if (x > new_length - 3) | |
3267 | x = new_length - 3; | |
3268 | ||
3269 | k = 0; | |
3270 | for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) { | |
3271 | int c; | |
3272 | ||
3273 | c = utf8_encoded_to_unichar(i); | |
3274 | if (c < 0) | |
3275 | return NULL; | |
3276 | k += unichar_iswide(c) ? 2 : 1; | |
3277 | } | |
3278 | ||
3279 | if (k > x) /* last character was wide and went over quota */ | |
3280 | x ++; | |
3281 | ||
3282 | for (j = s + old_length; k < new_length && j > i; ) { | |
3283 | int c; | |
3284 | ||
3285 | j = utf8_prev_char(j); | |
3286 | c = utf8_encoded_to_unichar(j); | |
3287 | if (c < 0) | |
3288 | return NULL; | |
3289 | k += unichar_iswide(c) ? 2 : 1; | |
3290 | } | |
3291 | assert(i <= j); | |
3292 | ||
3293 | /* we don't actually need to ellipsize */ | |
3294 | if (i == j) | |
3295 | return memdup(s, old_length + 1); | |
3296 | ||
3297 | /* make space for ellipsis */ | |
3298 | j = utf8_next_char(j); | |
3299 | ||
3300 | len = i - s; | |
3301 | len2 = s + old_length - j; | |
3302 | e = new(char, len + 3 + len2 + 1); | |
3303 | if (!e) | |
3304 | return NULL; | |
3305 | ||
3306 | /* | |
3307 | printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n", | |
3308 | old_length, new_length, x, len, len2, k); | |
3309 | */ | |
3310 | ||
3311 | memcpy(e, s, len); | |
3312 | e[len] = 0xe2; /* tri-dot ellipsis: … */ | |
3313 | e[len + 1] = 0x80; | |
3314 | e[len + 2] = 0xa6; | |
3315 | ||
3316 | memcpy(e + len + 3, j, len2 + 1); | |
3317 | ||
3318 | return e; | |
3319 | } | |
3320 | ||
72f59706 LP |
3321 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3322 | return ellipsize_mem(s, strlen(s), length, percent); | |
3323 | } | |
3324 | ||
f6144808 LP |
3325 | int touch(const char *path) { |
3326 | int fd; | |
3327 | ||
3328 | assert(path); | |
3329 | ||
73836c5c LP |
3330 | /* This just opens the file for writing, ensuring it |
3331 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3332 | * does it. */ | |
3333 | ||
3334 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3335 | if (fd < 0) | |
f6144808 LP |
3336 | return -errno; |
3337 | ||
3338 | close_nointr_nofail(fd); | |
3339 | return 0; | |
3340 | } | |
afea26ad | 3341 | |
97c4a07d | 3342 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3343 | size_t l; |
3344 | assert(s); | |
3345 | ||
73836c5c LP |
3346 | /* This is rather stupid, simply removes the heading and |
3347 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3348 | * escaping or anything. We should make this smarter one |
3349 | * day...*/ | |
73836c5c | 3350 | |
31ed59c5 LP |
3351 | l = strlen(s); |
3352 | if (l < 2) | |
11ce3427 LP |
3353 | return strdup(s); |
3354 | ||
97c4a07d | 3355 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3356 | return strndup(s+1, l-2); |
3357 | ||
3358 | return strdup(s); | |
3359 | } | |
3360 | ||
5f7c426e | 3361 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3362 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3363 | char *eq, *r; | |
5f7c426e | 3364 | |
57f30678 LP |
3365 | eq = strchr(s, '='); |
3366 | if (!eq) { | |
3367 | char *t; | |
5f7c426e | 3368 | |
57f30678 LP |
3369 | r = strdup(s); |
3370 | if (!r) | |
5f7c426e LP |
3371 | return NULL; |
3372 | ||
57f30678 LP |
3373 | t = strstrip(r); |
3374 | if (t == r) | |
3375 | return r; | |
3376 | ||
3377 | memmove(r, t, strlen(t) + 1); | |
3378 | return r; | |
5f7c426e LP |
3379 | } |
3380 | ||
57f30678 LP |
3381 | name = strndup(s, eq - s); |
3382 | if (!name) | |
5f7c426e LP |
3383 | return NULL; |
3384 | ||
57f30678 LP |
3385 | p = strdup(eq + 1); |
3386 | if (!p) | |
5f7c426e | 3387 | return NULL; |
5f7c426e LP |
3388 | |
3389 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3390 | if (!value) |
5f7c426e | 3391 | return NULL; |
5f7c426e | 3392 | |
57f30678 | 3393 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3394 | r = NULL; |
3395 | ||
5f7c426e LP |
3396 | return r; |
3397 | } | |
3398 | ||
8e12a6ae | 3399 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3400 | siginfo_t dummy; |
3401 | ||
2e78aa99 | 3402 | assert(pid >= 1); |
1968a360 LP |
3403 | |
3404 | if (!status) | |
3405 | status = &dummy; | |
2e78aa99 LP |
3406 | |
3407 | for (;;) { | |
8e12a6ae LP |
3408 | zero(*status); |
3409 | ||
3410 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3411 | |
3412 | if (errno == EINTR) | |
3413 | continue; | |
3414 | ||
3415 | return -errno; | |
3416 | } | |
3417 | ||
3418 | return 0; | |
3419 | } | |
3420 | } | |
3421 | ||
97c4a07d LP |
3422 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3423 | int r; | |
3424 | siginfo_t status; | |
3425 | ||
3426 | assert(name); | |
3427 | assert(pid > 1); | |
3428 | ||
d87be9b0 LP |
3429 | r = wait_for_terminate(pid, &status); |
3430 | if (r < 0) { | |
97c4a07d LP |
3431 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3432 | return r; | |
3433 | } | |
3434 | ||
3435 | if (status.si_code == CLD_EXITED) { | |
3436 | if (status.si_status != 0) { | |
3437 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3438 | return status.si_status; |
97c4a07d LP |
3439 | } |
3440 | ||
3441 | log_debug("%s succeeded.", name); | |
3442 | return 0; | |
3443 | ||
3444 | } else if (status.si_code == CLD_KILLED || | |
3445 | status.si_code == CLD_DUMPED) { | |
3446 | ||
3447 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3448 | return -EPROTO; | |
3449 | } | |
3450 | ||
3451 | log_warning("%s failed due to unknown reason.", name); | |
3452 | return -EPROTO; | |
97c4a07d LP |
3453 | } |
3454 | ||
919ce0b7 | 3455 | noreturn void freeze(void) { |
720ce21d LP |
3456 | |
3457 | /* Make sure nobody waits for us on a socket anymore */ | |
3458 | close_all_fds(NULL, 0); | |
3459 | ||
c29597a1 LP |
3460 | sync(); |
3461 | ||
3c14d26c LP |
3462 | for (;;) |
3463 | pause(); | |
3464 | } | |
3465 | ||
00dc5d76 LP |
3466 | bool null_or_empty(struct stat *st) { |
3467 | assert(st); | |
3468 | ||
3469 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3470 | return true; | |
3471 | ||
c8f26f42 | 3472 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3473 | return true; |
3474 | ||
3475 | return false; | |
3476 | } | |
3477 | ||
83096483 LP |
3478 | int null_or_empty_path(const char *fn) { |
3479 | struct stat st; | |
3480 | ||
3481 | assert(fn); | |
3482 | ||
3483 | if (stat(fn, &st) < 0) | |
3484 | return -errno; | |
3485 | ||
3486 | return null_or_empty(&st); | |
3487 | } | |
3488 | ||
a247755d | 3489 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3490 | int nfd; |
3491 | DIR *d; | |
3492 | ||
dd94c17e LP |
3493 | assert(!(flags & O_CREAT)); |
3494 | ||
3495 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
73836c5c | 3496 | if (nfd < 0) |
c4731d11 LP |
3497 | return NULL; |
3498 | ||
73836c5c LP |
3499 | d = fdopendir(nfd); |
3500 | if (!d) { | |
c4731d11 LP |
3501 | close_nointr_nofail(nfd); |
3502 | return NULL; | |
3503 | } | |
3504 | ||
3505 | return d; | |
3b63d2d3 LP |
3506 | } |
3507 | ||
8a0867d6 LP |
3508 | int signal_from_string_try_harder(const char *s) { |
3509 | int signo; | |
3510 | assert(s); | |
3511 | ||
73836c5c LP |
3512 | signo = signal_from_string(s); |
3513 | if (signo <= 0) | |
8a0867d6 LP |
3514 | if (startswith(s, "SIG")) |
3515 | return signal_from_string(s+3); | |
3516 | ||
3517 | return signo; | |
3518 | } | |
3519 | ||
383182b5 | 3520 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
22f5f628 DR |
3521 | _cleanup_free_ char *t = NULL, *u = NULL; |
3522 | char *dn; | |
3523 | size_t enc_len; | |
e23a0ce8 | 3524 | |
383182b5 DR |
3525 | u = unquote(tagvalue, "\"\'"); |
3526 | if (u == NULL) | |
3527 | return NULL; | |
e23a0ce8 | 3528 | |
1d5989fd | 3529 | enc_len = strlen(u) * 4 + 1; |
22f5f628 | 3530 | t = new(char, enc_len); |
383182b5 DR |
3531 | if (t == NULL) |
3532 | return NULL; | |
e23a0ce8 | 3533 | |
8f6ce71f | 3534 | if (encode_devnode_name(u, t, enc_len) < 0) |
22f5f628 | 3535 | return NULL; |
e23a0ce8 | 3536 | |
22f5f628 | 3537 | if (asprintf(&dn, "/dev/disk/by-%s/%s", by, t) < 0) |
383182b5 | 3538 | return NULL; |
e23a0ce8 | 3539 | |
383182b5 DR |
3540 | return dn; |
3541 | } | |
e23a0ce8 | 3542 | |
383182b5 | 3543 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3544 | assert(p); |
3545 | ||
383182b5 DR |
3546 | if (startswith(p, "LABEL=")) |
3547 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3548 | |
383182b5 DR |
3549 | if (startswith(p, "UUID=")) |
3550 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3551 | |
84cc2abf DR |
3552 | if (startswith(p, "PARTUUID=")) |
3553 | return tag_to_udev_node(p+9, "partuuid"); | |
3554 | ||
3555 | if (startswith(p, "PARTLABEL=")) | |
3556 | return tag_to_udev_node(p+10, "partlabel"); | |
3557 | ||
e23a0ce8 LP |
3558 | return strdup(p); |
3559 | } | |
3560 | ||
f212ac12 LP |
3561 | bool tty_is_vc(const char *tty) { |
3562 | assert(tty); | |
3563 | ||
3564 | if (startswith(tty, "/dev/")) | |
3565 | tty += 5; | |
3566 | ||
98a28fef LP |
3567 | return vtnr_from_tty(tty) >= 0; |
3568 | } | |
3569 | ||
d1122ad5 LP |
3570 | bool tty_is_console(const char *tty) { |
3571 | assert(tty); | |
3572 | ||
3573 | if (startswith(tty, "/dev/")) | |
3574 | tty += 5; | |
3575 | ||
3576 | return streq(tty, "console"); | |
3577 | } | |
3578 | ||
98a28fef LP |
3579 | int vtnr_from_tty(const char *tty) { |
3580 | int i, r; | |
3581 | ||
3582 | assert(tty); | |
3583 | ||
3584 | if (startswith(tty, "/dev/")) | |
3585 | tty += 5; | |
3586 | ||
3587 | if (!startswith(tty, "tty") ) | |
3588 | return -EINVAL; | |
3589 | ||
3590 | if (tty[3] < '0' || tty[3] > '9') | |
3591 | return -EINVAL; | |
3592 | ||
3593 | r = safe_atoi(tty+3, &i); | |
3594 | if (r < 0) | |
3595 | return r; | |
3596 | ||
3597 | if (i < 0 || i > 63) | |
3598 | return -EINVAL; | |
3599 | ||
3600 | return i; | |
f212ac12 LP |
3601 | } |
3602 | ||
21baf21a MS |
3603 | char *resolve_dev_console(char **active) { |
3604 | char *tty; | |
3605 | ||
3606 | /* Resolve where /dev/console is pointing to, if /sys is actually ours | |
3607 | * (i.e. not read-only-mounted which is a sign for container setups) */ | |
3608 | ||
3609 | if (path_is_read_only_fs("/sys") > 0) | |
3610 | return NULL; | |
3611 | ||
3612 | if (read_one_line_file("/sys/class/tty/console/active", active) < 0) | |
3613 | return NULL; | |
3614 | ||
3615 | /* If multiple log outputs are configured the last one is what | |
3616 | * /dev/console points to */ | |
3617 | tty = strrchr(*active, ' '); | |
3618 | if (tty) | |
3619 | tty++; | |
3620 | else | |
3621 | tty = *active; | |
3622 | ||
8aa5429a OB |
3623 | if (streq(tty, "tty0")) { |
3624 | char *tmp; | |
3625 | ||
3626 | /* Get the active VC (e.g. tty1) */ | |
3627 | if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) { | |
3628 | free(*active); | |
3629 | tty = *active = tmp; | |
3630 | } | |
3631 | } | |
3632 | ||
21baf21a MS |
3633 | return tty; |
3634 | } | |
3635 | ||
3043935f | 3636 | bool tty_is_vc_resolve(const char *tty) { |
9588bc32 | 3637 | _cleanup_free_ char *active = NULL; |
3030ccd7 | 3638 | |
e3aa71c3 LP |
3639 | assert(tty); |
3640 | ||
3641 | if (startswith(tty, "/dev/")) | |
3642 | tty += 5; | |
3643 | ||
21baf21a MS |
3644 | if (streq(tty, "console")) { |
3645 | tty = resolve_dev_console(&active); | |
3646 | if (!tty) | |
3647 | return false; | |
3648 | } | |
3030ccd7 | 3649 | |
9588bc32 | 3650 | return tty_is_vc(tty); |
3043935f LP |
3651 | } |
3652 | ||
3653 | const char *default_term_for_tty(const char *tty) { | |
3654 | assert(tty); | |
3655 | ||
acda6a05 | 3656 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3657 | } |
3658 | ||
87d2c1ff | 3659 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3660 | assert(de); |
3661 | ||
3662 | if (ignore_file(de->d_name)) | |
3663 | return false; | |
3664 | ||
3665 | if (de->d_type != DT_REG && | |
3666 | de->d_type != DT_LNK && | |
3667 | de->d_type != DT_UNKNOWN) | |
3668 | return false; | |
3669 | ||
3670 | return true; | |
3671 | } | |
3672 | ||
87d2c1ff LP |
3673 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3674 | assert(de); | |
3675 | ||
a228a22f LP |
3676 | if (de->d_type != DT_REG && |
3677 | de->d_type != DT_LNK && | |
3678 | de->d_type != DT_UNKNOWN) | |
3679 | return false; | |
3680 | ||
3681 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3682 | return false; |
3683 | ||
3684 | return endswith(de->d_name, suffix); | |
3685 | } | |
3686 | ||
aa62a893 LP |
3687 | void execute_directory(const char *directory, DIR *d, usec_t timeout, char *argv[]) { |
3688 | pid_t executor_pid; | |
3689 | int r; | |
83cc030f LP |
3690 | |
3691 | assert(directory); | |
3692 | ||
aa62a893 LP |
3693 | /* Executes all binaries in a directory in parallel and waits |
3694 | * for them to finish. Optionally a timeout is applied. */ | |
83cc030f | 3695 | |
aa62a893 LP |
3696 | executor_pid = fork(); |
3697 | if (executor_pid < 0) { | |
3698 | log_error("Failed to fork: %m"); | |
3699 | return; | |
83cc030f | 3700 | |
aa62a893 LP |
3701 | } else if (executor_pid == 0) { |
3702 | _cleanup_hashmap_free_free_ Hashmap *pids = NULL; | |
3703 | _cleanup_closedir_ DIR *_d = NULL; | |
3704 | struct dirent *de; | |
3705 | sigset_t ss; | |
83cc030f | 3706 | |
aa62a893 LP |
3707 | /* We fork this all off from a child process so that |
3708 | * we can somewhat cleanly make use of SIGALRM to set | |
3709 | * a time limit */ | |
83cc030f | 3710 | |
aa62a893 | 3711 | reset_all_signal_handlers(); |
83cc030f | 3712 | |
aa62a893 LP |
3713 | assert_se(sigemptyset(&ss) == 0); |
3714 | assert_se(sigprocmask(SIG_SETMASK, &ss, NULL) == 0); | |
83cc030f | 3715 | |
aa62a893 | 3716 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 3717 | |
aa62a893 LP |
3718 | if (!d) { |
3719 | d = _d = opendir(directory); | |
3720 | if (!d) { | |
3721 | if (errno == ENOENT) | |
3722 | _exit(EXIT_SUCCESS); | |
83cc030f | 3723 | |
aa62a893 LP |
3724 | log_error("Failed to enumerate directory %s: %m", directory); |
3725 | _exit(EXIT_FAILURE); | |
3726 | } | |
83cc030f LP |
3727 | } |
3728 | ||
aa62a893 LP |
3729 | pids = hashmap_new(NULL, NULL); |
3730 | if (!pids) { | |
3731 | log_oom(); | |
3732 | _exit(EXIT_FAILURE); | |
83cc030f LP |
3733 | } |
3734 | ||
aa62a893 LP |
3735 | FOREACH_DIRENT(de, d, break) { |
3736 | _cleanup_free_ char *path = NULL; | |
3737 | pid_t pid; | |
83cc030f | 3738 | |
aa62a893 LP |
3739 | if (!dirent_is_file(de)) |
3740 | continue; | |
83cc030f | 3741 | |
aa62a893 LP |
3742 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { |
3743 | log_oom(); | |
3744 | _exit(EXIT_FAILURE); | |
3745 | } | |
83cc030f | 3746 | |
aa62a893 LP |
3747 | pid = fork(); |
3748 | if (pid < 0) { | |
3749 | log_error("Failed to fork: %m"); | |
3750 | continue; | |
3751 | } else if (pid == 0) { | |
3752 | char *_argv[2]; | |
83cc030f | 3753 | |
aa62a893 | 3754 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 3755 | |
aa62a893 LP |
3756 | if (!argv) { |
3757 | _argv[0] = path; | |
3758 | _argv[1] = NULL; | |
3759 | argv = _argv; | |
3760 | } else | |
3761 | argv[0] = path; | |
83cc030f | 3762 | |
aa62a893 LP |
3763 | execv(path, argv); |
3764 | log_error("Failed to execute %s: %m", path); | |
3765 | _exit(EXIT_FAILURE); | |
3766 | } | |
83cc030f | 3767 | |
83cc030f | 3768 | |
aa62a893 | 3769 | log_debug("Spawned %s as " PID_FMT ".", path, pid); |
83cc030f | 3770 | |
aa62a893 LP |
3771 | r = hashmap_put(pids, UINT_TO_PTR(pid), path); |
3772 | if (r < 0) { | |
3773 | log_oom(); | |
3774 | _exit(EXIT_FAILURE); | |
3775 | } | |
3776 | ||
3777 | path = NULL; | |
83cc030f LP |
3778 | } |
3779 | ||
aa62a893 LP |
3780 | /* Abort execution of this process after the |
3781 | * timout. We simply rely on SIGALRM as default action | |
3782 | * terminating the process, and turn on alarm(). */ | |
3783 | ||
3784 | if (timeout != (usec_t) -1) | |
3785 | alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC); | |
3786 | ||
3787 | while (!hashmap_isempty(pids)) { | |
3788 | _cleanup_free_ char *path = NULL; | |
3789 | pid_t pid; | |
3790 | ||
3791 | pid = PTR_TO_UINT(hashmap_first_key(pids)); | |
3792 | assert(pid > 0); | |
83cc030f | 3793 | |
aa62a893 LP |
3794 | path = hashmap_remove(pids, UINT_TO_PTR(pid)); |
3795 | assert(path); | |
3796 | ||
3797 | wait_for_terminate_and_warn(path, pid); | |
83cc030f | 3798 | } |
83cc030f | 3799 | |
aa62a893 LP |
3800 | _exit(EXIT_SUCCESS); |
3801 | } | |
83cc030f | 3802 | |
aa62a893 | 3803 | wait_for_terminate_and_warn(directory, executor_pid); |
83cc030f LP |
3804 | } |
3805 | ||
430c18ed LP |
3806 | int kill_and_sigcont(pid_t pid, int sig) { |
3807 | int r; | |
3808 | ||
3809 | r = kill(pid, sig) < 0 ? -errno : 0; | |
3810 | ||
3811 | if (r >= 0) | |
3812 | kill(pid, SIGCONT); | |
3813 | ||
3814 | return r; | |
3815 | } | |
3816 | ||
05feefe0 LP |
3817 | bool nulstr_contains(const char*nulstr, const char *needle) { |
3818 | const char *i; | |
3819 | ||
3820 | if (!nulstr) | |
3821 | return false; | |
3822 | ||
3823 | NULSTR_FOREACH(i, nulstr) | |
3824 | if (streq(i, needle)) | |
3825 | return true; | |
3826 | ||
3827 | return false; | |
3828 | } | |
3829 | ||
6faa1114 | 3830 | bool plymouth_running(void) { |
9408a2d2 | 3831 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
3832 | } |
3833 | ||
9beb3f4d LP |
3834 | char* strshorten(char *s, size_t l) { |
3835 | assert(s); | |
3836 | ||
3837 | if (l < strlen(s)) | |
3838 | s[l] = 0; | |
3839 | ||
3840 | return s; | |
3841 | } | |
3842 | ||
3843 | static bool hostname_valid_char(char c) { | |
3844 | return | |
3845 | (c >= 'a' && c <= 'z') || | |
3846 | (c >= 'A' && c <= 'Z') || | |
3847 | (c >= '0' && c <= '9') || | |
3848 | c == '-' || | |
3849 | c == '_' || | |
3850 | c == '.'; | |
3851 | } | |
3852 | ||
3853 | bool hostname_is_valid(const char *s) { | |
3854 | const char *p; | |
aa3c5cf8 | 3855 | bool dot; |
9beb3f4d LP |
3856 | |
3857 | if (isempty(s)) | |
3858 | return false; | |
3859 | ||
aa3c5cf8 LP |
3860 | for (p = s, dot = true; *p; p++) { |
3861 | if (*p == '.') { | |
3862 | if (dot) | |
3863 | return false; | |
3864 | ||
3865 | dot = true; | |
3866 | } else { | |
3867 | if (!hostname_valid_char(*p)) | |
3868 | return false; | |
3869 | ||
3870 | dot = false; | |
3871 | } | |
3872 | } | |
3873 | ||
3874 | if (dot) | |
3875 | return false; | |
9beb3f4d LP |
3876 | |
3877 | if (p-s > HOST_NAME_MAX) | |
3878 | return false; | |
3879 | ||
3880 | return true; | |
3881 | } | |
3882 | ||
e724b063 | 3883 | char* hostname_cleanup(char *s, bool lowercase) { |
9beb3f4d | 3884 | char *p, *d; |
cec4ead9 LP |
3885 | bool dot; |
3886 | ||
3887 | for (p = s, d = s, dot = true; *p; p++) { | |
3888 | if (*p == '.') { | |
e724b063 | 3889 | if (dot) |
cec4ead9 | 3890 | continue; |
9beb3f4d | 3891 | |
e724b063 | 3892 | *(d++) = '.'; |
cec4ead9 | 3893 | dot = true; |
e724b063 LP |
3894 | } else if (hostname_valid_char(*p)) { |
3895 | *(d++) = lowercase ? tolower(*p) : *p; | |
cec4ead9 | 3896 | dot = false; |
e724b063 | 3897 | } |
cec4ead9 | 3898 | |
cec4ead9 | 3899 | } |
9beb3f4d | 3900 | |
e724b063 LP |
3901 | if (dot && d > s) |
3902 | d[-1] = 0; | |
3903 | else | |
3904 | *d = 0; | |
3905 | ||
9beb3f4d | 3906 | strshorten(s, HOST_NAME_MAX); |
cec4ead9 | 3907 | |
9beb3f4d LP |
3908 | return s; |
3909 | } | |
3910 | ||
1325aa42 | 3911 | int pipe_eof(int fd) { |
b92bea5d ZJS |
3912 | struct pollfd pollfd = { |
3913 | .fd = fd, | |
3914 | .events = POLLIN|POLLHUP, | |
3915 | }; | |
1325aa42 | 3916 | |
d37a91e8 LP |
3917 | int r; |
3918 | ||
1325aa42 LP |
3919 | r = poll(&pollfd, 1, 0); |
3920 | if (r < 0) | |
3921 | return -errno; | |
3922 | ||
3923 | if (r == 0) | |
3924 | return 0; | |
3925 | ||
3926 | return pollfd.revents & POLLHUP; | |
3927 | } | |
3928 | ||
8f2d43a0 | 3929 | int fd_wait_for_event(int fd, int event, usec_t t) { |
968d3d24 | 3930 | |
b92bea5d ZJS |
3931 | struct pollfd pollfd = { |
3932 | .fd = fd, | |
3933 | .events = event, | |
3934 | }; | |
df50185b | 3935 | |
968d3d24 LP |
3936 | struct timespec ts; |
3937 | int r; | |
3938 | ||
3939 | r = ppoll(&pollfd, 1, t == (usec_t) -1 ? NULL : timespec_store(&ts, t), NULL); | |
df50185b LP |
3940 | if (r < 0) |
3941 | return -errno; | |
3942 | ||
3943 | if (r == 0) | |
3944 | return 0; | |
3945 | ||
3946 | return pollfd.revents; | |
3947 | } | |
3948 | ||
5a3ab509 LP |
3949 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
3950 | FILE *f; | |
3951 | char *t; | |
3952 | const char *fn; | |
3953 | size_t k; | |
3954 | int fd; | |
3955 | ||
3956 | assert(path); | |
3957 | assert(_f); | |
3958 | assert(_temp_path); | |
3959 | ||
3960 | t = new(char, strlen(path) + 1 + 6 + 1); | |
3961 | if (!t) | |
3962 | return -ENOMEM; | |
3963 | ||
2b6bf07d ZJS |
3964 | fn = basename(path); |
3965 | k = fn - path; | |
5a3ab509 LP |
3966 | memcpy(t, path, k); |
3967 | t[k] = '.'; | |
3968 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
3969 | ||
2d5bdf5b | 3970 | fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC); |
5a3ab509 LP |
3971 | if (fd < 0) { |
3972 | free(t); | |
3973 | return -errno; | |
3974 | } | |
3975 | ||
3976 | f = fdopen(fd, "we"); | |
3977 | if (!f) { | |
3978 | unlink(t); | |
3979 | free(t); | |
3980 | return -errno; | |
3981 | } | |
3982 | ||
3983 | *_f = f; | |
3984 | *_temp_path = t; | |
3985 | ||
3986 | return 0; | |
3987 | } | |
3988 | ||
6ea832a2 | 3989 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
3990 | assert(fd >= 0); |
3991 | ||
6ea832a2 LP |
3992 | if (ioctl(fd, TIOCVHANGUP) < 0) |
3993 | return -errno; | |
3994 | ||
3995 | return 0; | |
3996 | } | |
3997 | ||
3998 | int terminal_vhangup(const char *name) { | |
3999 | int fd, r; | |
4000 | ||
4001 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4002 | if (fd < 0) | |
4003 | return fd; | |
4004 | ||
4005 | r = terminal_vhangup_fd(fd); | |
4006 | close_nointr_nofail(fd); | |
4007 | ||
4008 | return r; | |
4009 | } | |
4010 | ||
4011 | int vt_disallocate(const char *name) { | |
4012 | int fd, r; | |
4013 | unsigned u; | |
6ea832a2 LP |
4014 | |
4015 | /* Deallocate the VT if possible. If not possible | |
4016 | * (i.e. because it is the active one), at least clear it | |
4017 | * entirely (including the scrollback buffer) */ | |
4018 | ||
b83bc4e9 LP |
4019 | if (!startswith(name, "/dev/")) |
4020 | return -EINVAL; | |
4021 | ||
4022 | if (!tty_is_vc(name)) { | |
4023 | /* So this is not a VT. I guess we cannot deallocate | |
4024 | * it then. But let's at least clear the screen */ | |
4025 | ||
4026 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4027 | if (fd < 0) | |
4028 | return fd; | |
4029 | ||
8585357a LP |
4030 | loop_write(fd, |
4031 | "\033[r" /* clear scrolling region */ | |
4032 | "\033[H" /* move home */ | |
4033 | "\033[2J", /* clear screen */ | |
4034 | 10, false); | |
b83bc4e9 LP |
4035 | close_nointr_nofail(fd); |
4036 | ||
4037 | return 0; | |
4038 | } | |
6ea832a2 LP |
4039 | |
4040 | if (!startswith(name, "/dev/tty")) | |
4041 | return -EINVAL; | |
4042 | ||
4043 | r = safe_atou(name+8, &u); | |
4044 | if (r < 0) | |
4045 | return r; | |
4046 | ||
4047 | if (u <= 0) | |
b83bc4e9 | 4048 | return -EINVAL; |
6ea832a2 | 4049 | |
b83bc4e9 | 4050 | /* Try to deallocate */ |
6ea832a2 LP |
4051 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4052 | if (fd < 0) | |
4053 | return fd; | |
4054 | ||
4055 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4056 | close_nointr_nofail(fd); |
6ea832a2 | 4057 | |
b83bc4e9 LP |
4058 | if (r >= 0) |
4059 | return 0; | |
6ea832a2 | 4060 | |
b83bc4e9 | 4061 | if (errno != EBUSY) |
6ea832a2 | 4062 | return -errno; |
6ea832a2 | 4063 | |
b83bc4e9 LP |
4064 | /* Couldn't deallocate, so let's clear it fully with |
4065 | * scrollback */ | |
4066 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4067 | if (fd < 0) |
b83bc4e9 | 4068 | return fd; |
6ea832a2 | 4069 | |
8585357a LP |
4070 | loop_write(fd, |
4071 | "\033[r" /* clear scrolling region */ | |
4072 | "\033[H" /* move home */ | |
4073 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4074 | 10, false); | |
b83bc4e9 | 4075 | close_nointr_nofail(fd); |
6ea832a2 | 4076 | |
b83bc4e9 | 4077 | return 0; |
6ea832a2 LP |
4078 | } |
4079 | ||
51045322 LP |
4080 | int copy_file(const char *from, const char *to, int flags) { |
4081 | _cleanup_close_ int fdf = -1; | |
4082 | int r, fdt; | |
34ca941c LP |
4083 | |
4084 | assert(from); | |
4085 | assert(to); | |
4086 | ||
4087 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4088 | if (fdf < 0) | |
4089 | return -errno; | |
4090 | ||
51045322 LP |
4091 | fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); |
4092 | if (fdt < 0) | |
34ca941c | 4093 | return -errno; |
34ca941c LP |
4094 | |
4095 | for (;;) { | |
4096 | char buf[PIPE_BUF]; | |
4097 | ssize_t n, k; | |
4098 | ||
4099 | n = read(fdf, buf, sizeof(buf)); | |
4100 | if (n < 0) { | |
4101 | r = -errno; | |
4102 | ||
34ca941c LP |
4103 | close_nointr(fdt); |
4104 | unlink(to); | |
4105 | ||
4106 | return r; | |
4107 | } | |
4108 | ||
4109 | if (n == 0) | |
4110 | break; | |
4111 | ||
4112 | errno = 0; | |
4113 | k = loop_write(fdt, buf, n, false); | |
4114 | if (n != k) { | |
4115 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4116 | ||
34ca941c | 4117 | close_nointr(fdt); |
34ca941c | 4118 | unlink(to); |
51045322 | 4119 | |
34ca941c LP |
4120 | return r; |
4121 | } | |
4122 | } | |
4123 | ||
34ca941c LP |
4124 | r = close_nointr(fdt); |
4125 | ||
4126 | if (r < 0) { | |
4127 | unlink(to); | |
4128 | return r; | |
4129 | } | |
4130 | ||
4131 | return 0; | |
4132 | } | |
4133 | ||
424a19f8 LP |
4134 | int symlink_atomic(const char *from, const char *to) { |
4135 | char *x; | |
4136 | _cleanup_free_ char *t; | |
34ca941c LP |
4137 | const char *fn; |
4138 | size_t k; | |
9bf3b535 | 4139 | uint64_t u; |
34ca941c LP |
4140 | unsigned i; |
4141 | int r; | |
4142 | ||
4143 | assert(from); | |
4144 | assert(to); | |
4145 | ||
4146 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4147 | if (!t) | |
4148 | return -ENOMEM; | |
4149 | ||
2b6bf07d | 4150 | fn = basename(to); |
34ca941c LP |
4151 | k = fn-to; |
4152 | memcpy(t, to, k); | |
4153 | t[k] = '.'; | |
4154 | x = stpcpy(t+k+1, fn); | |
4155 | ||
9bf3b535 | 4156 | u = random_u64(); |
34ca941c | 4157 | for (i = 0; i < 16; i++) { |
9bf3b535 LP |
4158 | *(x++) = hexchar(u & 0xF); |
4159 | u >>= 4; | |
34ca941c LP |
4160 | } |
4161 | ||
4162 | *x = 0; | |
4163 | ||
424a19f8 LP |
4164 | if (symlink(from, t) < 0) |
4165 | return -errno; | |
34ca941c LP |
4166 | |
4167 | if (rename(t, to) < 0) { | |
4168 | r = -errno; | |
4169 | unlink(t); | |
34ca941c LP |
4170 | return r; |
4171 | } | |
4172 | ||
424a19f8 | 4173 | return 0; |
34ca941c LP |
4174 | } |
4175 | ||
4d6d6518 LP |
4176 | bool display_is_local(const char *display) { |
4177 | assert(display); | |
4178 | ||
4179 | return | |
4180 | display[0] == ':' && | |
4181 | display[1] >= '0' && | |
4182 | display[1] <= '9'; | |
4183 | } | |
4184 | ||
4185 | int socket_from_display(const char *display, char **path) { | |
4186 | size_t k; | |
4187 | char *f, *c; | |
4188 | ||
4189 | assert(display); | |
4190 | assert(path); | |
4191 | ||
4192 | if (!display_is_local(display)) | |
4193 | return -EINVAL; | |
4194 | ||
4195 | k = strspn(display+1, "0123456789"); | |
4196 | ||
4197 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4198 | if (!f) | |
4199 | return -ENOMEM; | |
4200 | ||
4201 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4202 | memcpy(c, display+1, k); | |
4203 | c[k] = 0; | |
4204 | ||
4205 | *path = f; | |
4206 | ||
4207 | return 0; | |
4208 | } | |
4209 | ||
d05c5031 LP |
4210 | int get_user_creds( |
4211 | const char **username, | |
4212 | uid_t *uid, gid_t *gid, | |
4213 | const char **home, | |
4214 | const char **shell) { | |
4215 | ||
1cccf435 | 4216 | struct passwd *p; |
ddd88763 | 4217 | uid_t u; |
1cccf435 MV |
4218 | |
4219 | assert(username); | |
4220 | assert(*username); | |
1cccf435 MV |
4221 | |
4222 | /* We enforce some special rules for uid=0: in order to avoid | |
4223 | * NSS lookups for root we hardcode its data. */ | |
4224 | ||
4225 | if (streq(*username, "root") || streq(*username, "0")) { | |
4226 | *username = "root"; | |
4b67834e LP |
4227 | |
4228 | if (uid) | |
4229 | *uid = 0; | |
4230 | ||
4231 | if (gid) | |
4232 | *gid = 0; | |
4233 | ||
4234 | if (home) | |
4235 | *home = "/root"; | |
d05c5031 LP |
4236 | |
4237 | if (shell) | |
4238 | *shell = "/bin/sh"; | |
4239 | ||
1cccf435 MV |
4240 | return 0; |
4241 | } | |
4242 | ||
ddd88763 | 4243 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4244 | errno = 0; |
ddd88763 | 4245 | p = getpwuid(u); |
1cccf435 MV |
4246 | |
4247 | /* If there are multiple users with the same id, make | |
4248 | * sure to leave $USER to the configured value instead | |
4249 | * of the first occurrence in the database. However if | |
4250 | * the uid was configured by a numeric uid, then let's | |
4251 | * pick the real username from /etc/passwd. */ | |
4252 | if (p) | |
4253 | *username = p->pw_name; | |
4254 | } else { | |
4255 | errno = 0; | |
4256 | p = getpwnam(*username); | |
4257 | } | |
4258 | ||
4259 | if (!p) | |
8333c77e | 4260 | return errno > 0 ? -errno : -ESRCH; |
1cccf435 | 4261 | |
4b67834e LP |
4262 | if (uid) |
4263 | *uid = p->pw_uid; | |
4264 | ||
4265 | if (gid) | |
4266 | *gid = p->pw_gid; | |
4267 | ||
4268 | if (home) | |
4269 | *home = p->pw_dir; | |
4270 | ||
d05c5031 LP |
4271 | if (shell) |
4272 | *shell = p->pw_shell; | |
4273 | ||
4b67834e LP |
4274 | return 0; |
4275 | } | |
4276 | ||
59164be4 LP |
4277 | char* uid_to_name(uid_t uid) { |
4278 | struct passwd *p; | |
4279 | char *r; | |
4280 | ||
4281 | if (uid == 0) | |
4282 | return strdup("root"); | |
4283 | ||
4284 | p = getpwuid(uid); | |
4285 | if (p) | |
4286 | return strdup(p->pw_name); | |
4287 | ||
4288 | if (asprintf(&r, "%lu", (unsigned long) uid) < 0) | |
4289 | return NULL; | |
4290 | ||
4291 | return r; | |
4292 | } | |
4293 | ||
4468addc LP |
4294 | char* gid_to_name(gid_t gid) { |
4295 | struct group *p; | |
4296 | char *r; | |
4297 | ||
4298 | if (gid == 0) | |
4299 | return strdup("root"); | |
4300 | ||
4301 | p = getgrgid(gid); | |
4302 | if (p) | |
4303 | return strdup(p->gr_name); | |
4304 | ||
4305 | if (asprintf(&r, "%lu", (unsigned long) gid) < 0) | |
4306 | return NULL; | |
4307 | ||
4308 | return r; | |
4309 | } | |
4310 | ||
4b67834e LP |
4311 | int get_group_creds(const char **groupname, gid_t *gid) { |
4312 | struct group *g; | |
4313 | gid_t id; | |
4314 | ||
4315 | assert(groupname); | |
4316 | ||
4317 | /* We enforce some special rules for gid=0: in order to avoid | |
4318 | * NSS lookups for root we hardcode its data. */ | |
4319 | ||
4320 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4321 | *groupname = "root"; | |
4322 | ||
4323 | if (gid) | |
4324 | *gid = 0; | |
4325 | ||
4326 | return 0; | |
4327 | } | |
4328 | ||
4329 | if (parse_gid(*groupname, &id) >= 0) { | |
4330 | errno = 0; | |
4331 | g = getgrgid(id); | |
4332 | ||
4333 | if (g) | |
4334 | *groupname = g->gr_name; | |
4335 | } else { | |
4336 | errno = 0; | |
4337 | g = getgrnam(*groupname); | |
4338 | } | |
4339 | ||
4340 | if (!g) | |
8333c77e | 4341 | return errno > 0 ? -errno : -ESRCH; |
4b67834e LP |
4342 | |
4343 | if (gid) | |
4344 | *gid = g->gr_gid; | |
4345 | ||
1cccf435 MV |
4346 | return 0; |
4347 | } | |
4348 | ||
4468addc LP |
4349 | int in_gid(gid_t gid) { |
4350 | gid_t *gids; | |
43673799 LP |
4351 | int ngroups_max, r, i; |
4352 | ||
43673799 LP |
4353 | if (getgid() == gid) |
4354 | return 1; | |
4355 | ||
4356 | if (getegid() == gid) | |
4357 | return 1; | |
4358 | ||
4359 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4360 | assert(ngroups_max > 0); | |
4361 | ||
4362 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4363 | ||
4364 | r = getgroups(ngroups_max, gids); | |
4365 | if (r < 0) | |
4366 | return -errno; | |
4367 | ||
4368 | for (i = 0; i < r; i++) | |
4369 | if (gids[i] == gid) | |
4370 | return 1; | |
4371 | ||
4372 | return 0; | |
4373 | } | |
4374 | ||
4468addc LP |
4375 | int in_group(const char *name) { |
4376 | int r; | |
4377 | gid_t gid; | |
4378 | ||
4379 | r = get_group_creds(&name, &gid); | |
4380 | if (r < 0) | |
4381 | return r; | |
4382 | ||
4383 | return in_gid(gid); | |
4384 | } | |
4385 | ||
8092a428 | 4386 | int glob_exists(const char *path) { |
7fd1b19b | 4387 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 4388 | int k; |
8092a428 LP |
4389 | |
4390 | assert(path); | |
4391 | ||
8092a428 LP |
4392 | errno = 0; |
4393 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4394 | ||
4395 | if (k == GLOB_NOMATCH) | |
8d98da3f | 4396 | return 0; |
8092a428 | 4397 | else if (k == GLOB_NOSPACE) |
8d98da3f | 4398 | return -ENOMEM; |
8092a428 | 4399 | else if (k == 0) |
8d98da3f | 4400 | return !strv_isempty(g.gl_pathv); |
8092a428 | 4401 | else |
8d98da3f ZJS |
4402 | return errno ? -errno : -EIO; |
4403 | } | |
8092a428 | 4404 | |
8d98da3f ZJS |
4405 | int glob_extend(char ***strv, const char *path) { |
4406 | _cleanup_globfree_ glob_t g = {}; | |
4407 | int k; | |
4408 | char **p; | |
4409 | ||
4410 | errno = 0; | |
a8ccacf5 | 4411 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
4412 | |
4413 | if (k == GLOB_NOMATCH) | |
4414 | return -ENOENT; | |
4415 | else if (k == GLOB_NOSPACE) | |
4416 | return -ENOMEM; | |
4417 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
4418 | return errno ? -errno : -EIO; | |
4419 | ||
4420 | STRV_FOREACH(p, g.gl_pathv) { | |
4421 | k = strv_extend(strv, *p); | |
4422 | if (k < 0) | |
4423 | break; | |
4424 | } | |
4425 | ||
4426 | return k; | |
8092a428 LP |
4427 | } |
4428 | ||
83096483 LP |
4429 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4430 | struct stat st; | |
4431 | ||
4432 | assert(d); | |
4433 | assert(de); | |
4434 | ||
4435 | if (de->d_type != DT_UNKNOWN) | |
4436 | return 0; | |
4437 | ||
4438 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4439 | return -errno; | |
4440 | ||
4441 | de->d_type = | |
4442 | S_ISREG(st.st_mode) ? DT_REG : | |
4443 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4444 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4445 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4446 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4447 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4448 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4449 | DT_UNKNOWN; | |
4450 | ||
4451 | return 0; | |
4452 | } | |
4453 | ||
4454 | int in_search_path(const char *path, char **search) { | |
893fa014 ZJS |
4455 | char **i; |
4456 | _cleanup_free_ char *parent = NULL; | |
83096483 LP |
4457 | int r; |
4458 | ||
9eb977db | 4459 | r = path_get_parent(path, &parent); |
83096483 LP |
4460 | if (r < 0) |
4461 | return r; | |
4462 | ||
893fa014 ZJS |
4463 | STRV_FOREACH(i, search) |
4464 | if (path_equal(parent, *i)) | |
4465 | return 1; | |
83096483 | 4466 | |
893fa014 | 4467 | return 0; |
83096483 LP |
4468 | } |
4469 | ||
034a2a52 | 4470 | int get_files_in_directory(const char *path, char ***list) { |
893fa014 ZJS |
4471 | _cleanup_closedir_ DIR *d = NULL; |
4472 | size_t bufsize = 0, n = 0; | |
4473 | _cleanup_strv_free_ char **l = NULL; | |
034a2a52 LP |
4474 | |
4475 | assert(path); | |
d60ef526 LP |
4476 | |
4477 | /* Returns all files in a directory in *list, and the number | |
4478 | * of files as return value. If list is NULL returns only the | |
893fa014 | 4479 | * number. */ |
034a2a52 LP |
4480 | |
4481 | d = opendir(path); | |
8ea913b2 LP |
4482 | if (!d) |
4483 | return -errno; | |
4484 | ||
034a2a52 | 4485 | for (;;) { |
7d5e9c0f | 4486 | struct dirent *de; |
034a2a52 | 4487 | |
3fd11280 FW |
4488 | errno = 0; |
4489 | de = readdir(d); | |
4490 | if (!de && errno != 0) | |
4491 | return -errno; | |
034a2a52 LP |
4492 | if (!de) |
4493 | break; | |
4494 | ||
4495 | dirent_ensure_type(d, de); | |
4496 | ||
4497 | if (!dirent_is_file(de)) | |
4498 | continue; | |
4499 | ||
d60ef526 | 4500 | if (list) { |
893fa014 ZJS |
4501 | /* one extra slot is needed for the terminating NULL */ |
4502 | if (!GREEDY_REALLOC(l, bufsize, n + 2)) | |
4503 | return -ENOMEM; | |
034a2a52 | 4504 | |
893fa014 ZJS |
4505 | l[n] = strdup(de->d_name); |
4506 | if (!l[n]) | |
4507 | return -ENOMEM; | |
034a2a52 | 4508 | |
893fa014 | 4509 | l[++n] = NULL; |
d60ef526 | 4510 | } else |
893fa014 | 4511 | n++; |
034a2a52 LP |
4512 | } |
4513 | ||
893fa014 ZJS |
4514 | if (list) { |
4515 | *list = l; | |
4516 | l = NULL; /* avoid freeing */ | |
4517 | } | |
034a2a52 | 4518 | |
893fa014 | 4519 | return n; |
034a2a52 LP |
4520 | } |
4521 | ||
b7def684 | 4522 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4523 | va_list ap; |
4524 | size_t l; | |
4525 | char *r, *p; | |
4526 | ||
4527 | va_start(ap, x); | |
4528 | ||
4529 | if (x) { | |
4530 | l = strlen(x); | |
4531 | ||
4532 | for (;;) { | |
4533 | const char *t; | |
040f18ea | 4534 | size_t n; |
911a4828 LP |
4535 | |
4536 | t = va_arg(ap, const char *); | |
4537 | if (!t) | |
4538 | break; | |
4539 | ||
040f18ea | 4540 | n = strlen(t); |
e98055de LN |
4541 | if (n > ((size_t) -1) - l) { |
4542 | va_end(ap); | |
040f18ea | 4543 | return NULL; |
e98055de | 4544 | } |
040f18ea LP |
4545 | |
4546 | l += n; | |
911a4828 LP |
4547 | } |
4548 | } else | |
4549 | l = 0; | |
4550 | ||
4551 | va_end(ap); | |
4552 | ||
4553 | r = new(char, l+1); | |
4554 | if (!r) | |
4555 | return NULL; | |
4556 | ||
4557 | if (x) { | |
4558 | p = stpcpy(r, x); | |
4559 | ||
4560 | va_start(ap, x); | |
4561 | ||
4562 | for (;;) { | |
4563 | const char *t; | |
4564 | ||
4565 | t = va_arg(ap, const char *); | |
4566 | if (!t) | |
4567 | break; | |
4568 | ||
4569 | p = stpcpy(p, t); | |
4570 | } | |
8ea913b2 LP |
4571 | |
4572 | va_end(ap); | |
911a4828 LP |
4573 | } else |
4574 | r[0] = 0; | |
4575 | ||
4576 | return r; | |
4577 | } | |
4578 | ||
b636465b | 4579 | bool is_main_thread(void) { |
ec202eae | 4580 | static thread_local int cached = 0; |
b636465b LP |
4581 | |
4582 | if (_unlikely_(cached == 0)) | |
4583 | cached = getpid() == gettid() ? 1 : -1; | |
4584 | ||
4585 | return cached > 0; | |
4586 | } | |
4587 | ||
94959f0f LP |
4588 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4589 | char *p, *s; | |
4590 | int r; | |
4591 | unsigned n, m; | |
4592 | ||
4593 | assert(ret); | |
4594 | ||
4595 | /* If it has a queue this is good enough for us */ | |
4596 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4597 | return -ENOMEM; | |
4598 | ||
4599 | r = access(p, F_OK); | |
4600 | free(p); | |
4601 | ||
4602 | if (r >= 0) { | |
4603 | *ret = d; | |
4604 | return 0; | |
4605 | } | |
4606 | ||
4607 | /* If it is a partition find the originating device */ | |
4608 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4609 | return -ENOMEM; | |
4610 | ||
4611 | r = access(p, F_OK); | |
4612 | free(p); | |
4613 | ||
4614 | if (r < 0) | |
4615 | return -ENOENT; | |
4616 | ||
4617 | /* Get parent dev_t */ | |
4618 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4619 | return -ENOMEM; | |
4620 | ||
4621 | r = read_one_line_file(p, &s); | |
4622 | free(p); | |
4623 | ||
4624 | if (r < 0) | |
4625 | return r; | |
4626 | ||
4627 | r = sscanf(s, "%u:%u", &m, &n); | |
4628 | free(s); | |
4629 | ||
4630 | if (r != 2) | |
4631 | return -EINVAL; | |
4632 | ||
4633 | /* Only return this if it is really good enough for us. */ | |
4634 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4635 | return -ENOMEM; | |
4636 | ||
4637 | r = access(p, F_OK); | |
4638 | free(p); | |
4639 | ||
4640 | if (r >= 0) { | |
4641 | *ret = makedev(m, n); | |
4642 | return 0; | |
4643 | } | |
4644 | ||
4645 | return -ENOENT; | |
4646 | } | |
4647 | ||
8d53b453 | 4648 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4649 | struct stat st; |
4650 | ||
4651 | assert(p); | |
4652 | ||
4653 | if (lstat(p, &st) < 0) | |
4654 | return -errno; | |
4655 | ||
4656 | return | |
8d53b453 | 4657 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4658 | (st.st_mode & S_ISVTX); |
4659 | } | |
94959f0f | 4660 | |
f41607a6 LP |
4661 | static const char *const ioprio_class_table[] = { |
4662 | [IOPRIO_CLASS_NONE] = "none", | |
4663 | [IOPRIO_CLASS_RT] = "realtime", | |
4664 | [IOPRIO_CLASS_BE] = "best-effort", | |
4665 | [IOPRIO_CLASS_IDLE] = "idle" | |
4666 | }; | |
4667 | ||
f8b69d1d | 4668 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4669 | |
4670 | static const char *const sigchld_code_table[] = { | |
4671 | [CLD_EXITED] = "exited", | |
4672 | [CLD_KILLED] = "killed", | |
4673 | [CLD_DUMPED] = "dumped", | |
4674 | [CLD_TRAPPED] = "trapped", | |
4675 | [CLD_STOPPED] = "stopped", | |
4676 | [CLD_CONTINUED] = "continued", | |
4677 | }; | |
4678 | ||
4679 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4680 | ||
4681 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4682 | [LOG_FAC(LOG_KERN)] = "kern", | |
4683 | [LOG_FAC(LOG_USER)] = "user", | |
4684 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4685 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4686 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4687 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4688 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4689 | [LOG_FAC(LOG_NEWS)] = "news", | |
4690 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4691 | [LOG_FAC(LOG_CRON)] = "cron", | |
4692 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4693 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4694 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4695 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4696 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4697 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4698 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4699 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4700 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4701 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4702 | }; | |
4703 | ||
f8b69d1d | 4704 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4705 | |
4706 | static const char *const log_level_table[] = { | |
4707 | [LOG_EMERG] = "emerg", | |
4708 | [LOG_ALERT] = "alert", | |
4709 | [LOG_CRIT] = "crit", | |
4710 | [LOG_ERR] = "err", | |
4711 | [LOG_WARNING] = "warning", | |
4712 | [LOG_NOTICE] = "notice", | |
4713 | [LOG_INFO] = "info", | |
4714 | [LOG_DEBUG] = "debug" | |
4715 | }; | |
4716 | ||
f8b69d1d | 4717 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4718 | |
4719 | static const char* const sched_policy_table[] = { | |
4720 | [SCHED_OTHER] = "other", | |
4721 | [SCHED_BATCH] = "batch", | |
4722 | [SCHED_IDLE] = "idle", | |
4723 | [SCHED_FIFO] = "fifo", | |
4724 | [SCHED_RR] = "rr" | |
4725 | }; | |
4726 | ||
f8b69d1d | 4727 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 | 4728 | |
517d56b1 | 4729 | static const char* const rlimit_table[_RLIMIT_MAX] = { |
f41607a6 LP |
4730 | [RLIMIT_CPU] = "LimitCPU", |
4731 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4732 | [RLIMIT_DATA] = "LimitDATA", | |
4733 | [RLIMIT_STACK] = "LimitSTACK", | |
4734 | [RLIMIT_CORE] = "LimitCORE", | |
4735 | [RLIMIT_RSS] = "LimitRSS", | |
4736 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4737 | [RLIMIT_AS] = "LimitAS", | |
4738 | [RLIMIT_NPROC] = "LimitNPROC", | |
4739 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4740 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4741 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4742 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4743 | [RLIMIT_NICE] = "LimitNICE", | |
4744 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4745 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4746 | }; | |
4747 | ||
4748 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4749 | ||
4750 | static const char* const ip_tos_table[] = { | |
4751 | [IPTOS_LOWDELAY] = "low-delay", | |
4752 | [IPTOS_THROUGHPUT] = "throughput", | |
4753 | [IPTOS_RELIABILITY] = "reliability", | |
4754 | [IPTOS_LOWCOST] = "low-cost", | |
4755 | }; | |
4756 | ||
f8b69d1d | 4757 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4758 | |
4e240ab0 | 4759 | static const char *const __signal_table[] = { |
f41607a6 LP |
4760 | [SIGHUP] = "HUP", |
4761 | [SIGINT] = "INT", | |
4762 | [SIGQUIT] = "QUIT", | |
4763 | [SIGILL] = "ILL", | |
4764 | [SIGTRAP] = "TRAP", | |
4765 | [SIGABRT] = "ABRT", | |
4766 | [SIGBUS] = "BUS", | |
4767 | [SIGFPE] = "FPE", | |
4768 | [SIGKILL] = "KILL", | |
4769 | [SIGUSR1] = "USR1", | |
4770 | [SIGSEGV] = "SEGV", | |
4771 | [SIGUSR2] = "USR2", | |
4772 | [SIGPIPE] = "PIPE", | |
4773 | [SIGALRM] = "ALRM", | |
4774 | [SIGTERM] = "TERM", | |
4775 | #ifdef SIGSTKFLT | |
4776 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4777 | #endif | |
4778 | [SIGCHLD] = "CHLD", | |
4779 | [SIGCONT] = "CONT", | |
4780 | [SIGSTOP] = "STOP", | |
4781 | [SIGTSTP] = "TSTP", | |
4782 | [SIGTTIN] = "TTIN", | |
4783 | [SIGTTOU] = "TTOU", | |
4784 | [SIGURG] = "URG", | |
4785 | [SIGXCPU] = "XCPU", | |
4786 | [SIGXFSZ] = "XFSZ", | |
4787 | [SIGVTALRM] = "VTALRM", | |
4788 | [SIGPROF] = "PROF", | |
4789 | [SIGWINCH] = "WINCH", | |
4790 | [SIGIO] = "IO", | |
4791 | [SIGPWR] = "PWR", | |
4792 | [SIGSYS] = "SYS" | |
4793 | }; | |
4794 | ||
4e240ab0 MS |
4795 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4796 | ||
4797 | const char *signal_to_string(int signo) { | |
ec202eae | 4798 | static thread_local char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1]; |
4e240ab0 MS |
4799 | const char *name; |
4800 | ||
4801 | name = __signal_to_string(signo); | |
4802 | if (name) | |
4803 | return name; | |
4804 | ||
4805 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
fa70beaa | 4806 | snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN); |
4e240ab0 | 4807 | else |
fa70beaa LP |
4808 | snprintf(buf, sizeof(buf), "%d", signo); |
4809 | ||
4e240ab0 MS |
4810 | return buf; |
4811 | } | |
4812 | ||
4813 | int signal_from_string(const char *s) { | |
4814 | int signo; | |
4815 | int offset = 0; | |
4816 | unsigned u; | |
4817 | ||
040f18ea | 4818 | signo = __signal_from_string(s); |
4e240ab0 MS |
4819 | if (signo > 0) |
4820 | return signo; | |
4821 | ||
4822 | if (startswith(s, "RTMIN+")) { | |
4823 | s += 6; | |
4824 | offset = SIGRTMIN; | |
4825 | } | |
4826 | if (safe_atou(s, &u) >= 0) { | |
4827 | signo = (int) u + offset; | |
4828 | if (signo > 0 && signo < _NSIG) | |
4829 | return signo; | |
4830 | } | |
4831 | return -1; | |
4832 | } | |
65457142 FC |
4833 | |
4834 | bool kexec_loaded(void) { | |
4835 | bool loaded = false; | |
4836 | char *s; | |
4837 | ||
4838 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
4839 | if (s[0] == '1') | |
4840 | loaded = true; | |
4841 | free(s); | |
4842 | } | |
4843 | return loaded; | |
4844 | } | |
fb9de93d LP |
4845 | |
4846 | int strdup_or_null(const char *a, char **b) { | |
4847 | char *c; | |
4848 | ||
4849 | assert(b); | |
4850 | ||
4851 | if (!a) { | |
4852 | *b = NULL; | |
4853 | return 0; | |
4854 | } | |
4855 | ||
4856 | c = strdup(a); | |
4857 | if (!c) | |
4858 | return -ENOMEM; | |
4859 | ||
4860 | *b = c; | |
4861 | return 0; | |
4862 | } | |
64685e0c | 4863 | |
87d2c1ff LP |
4864 | int prot_from_flags(int flags) { |
4865 | ||
4866 | switch (flags & O_ACCMODE) { | |
4867 | ||
4868 | case O_RDONLY: | |
4869 | return PROT_READ; | |
4870 | ||
4871 | case O_WRONLY: | |
4872 | return PROT_WRITE; | |
4873 | ||
4874 | case O_RDWR: | |
4875 | return PROT_READ|PROT_WRITE; | |
4876 | ||
4877 | default: | |
4878 | return -EINVAL; | |
4879 | } | |
7c99e0c1 | 4880 | } |
689b9a22 | 4881 | |
babfc091 | 4882 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 4883 | unsigned i; |
babfc091 LP |
4884 | |
4885 | static const struct { | |
4886 | const char *suffix; | |
4887 | off_t factor; | |
4888 | } table[] = { | |
32895bb3 LP |
4889 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
4890 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
4891 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
4892 | { "G", 1024ULL*1024ULL*1024ULL }, | |
4893 | { "M", 1024ULL*1024ULL }, | |
4894 | { "K", 1024ULL }, | |
4895 | }; | |
4896 | ||
4897 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
4898 | ||
4899 | if (t >= table[i].factor) { | |
4900 | snprintf(buf, l, | |
4901 | "%llu.%llu%s", | |
4902 | (unsigned long long) (t / table[i].factor), | |
4903 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
4904 | table[i].suffix); | |
4905 | ||
4906 | goto finish; | |
4907 | } | |
4908 | } | |
4909 | ||
4910 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
4911 | ||
4912 | finish: | |
4913 | buf[l-1] = 0; | |
4914 | return buf; | |
4915 | ||
4916 | } | |
55d7bfc1 LP |
4917 | |
4918 | void* memdup(const void *p, size_t l) { | |
4919 | void *r; | |
4920 | ||
4921 | assert(p); | |
4922 | ||
4923 | r = malloc(l); | |
4924 | if (!r) | |
4925 | return NULL; | |
4926 | ||
4927 | memcpy(r, p, l); | |
4928 | return r; | |
4929 | } | |
bb99a35a LP |
4930 | |
4931 | int fd_inc_sndbuf(int fd, size_t n) { | |
4932 | int r, value; | |
4933 | socklen_t l = sizeof(value); | |
4934 | ||
4935 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
92d75ca4 | 4936 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
4937 | return 0; |
4938 | ||
92d75ca4 LP |
4939 | /* If we have the privileges we will ignore the kernel limit. */ |
4940 | ||
bb99a35a | 4941 | value = (int) n; |
92d75ca4 LP |
4942 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) |
4943 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) | |
4944 | return -errno; | |
bb99a35a LP |
4945 | |
4946 | return 1; | |
4947 | } | |
4948 | ||
4949 | int fd_inc_rcvbuf(int fd, size_t n) { | |
4950 | int r, value; | |
4951 | socklen_t l = sizeof(value); | |
4952 | ||
4953 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
92d75ca4 | 4954 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
4955 | return 0; |
4956 | ||
92d75ca4 | 4957 | /* If we have the privileges we will ignore the kernel limit. */ |
bb99a35a | 4958 | |
92d75ca4 LP |
4959 | value = (int) n; |
4960 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) | |
4961 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) | |
4962 | return -errno; | |
bb99a35a LP |
4963 | return 1; |
4964 | } | |
6bb92a16 | 4965 | |
9bdc770c | 4966 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
4967 | pid_t parent_pid, agent_pid; |
4968 | int fd; | |
4969 | bool stdout_is_tty, stderr_is_tty; | |
4970 | unsigned n, i; | |
4971 | va_list ap; | |
4972 | char **l; | |
4973 | ||
4974 | assert(pid); | |
4975 | assert(path); | |
4976 | ||
4977 | parent_pid = getpid(); | |
4978 | ||
4979 | /* Spawns a temporary TTY agent, making sure it goes away when | |
4980 | * we go away */ | |
4981 | ||
4982 | agent_pid = fork(); | |
4983 | if (agent_pid < 0) | |
4984 | return -errno; | |
4985 | ||
4986 | if (agent_pid != 0) { | |
4987 | *pid = agent_pid; | |
4988 | return 0; | |
4989 | } | |
4990 | ||
4991 | /* In the child: | |
4992 | * | |
4993 | * Make sure the agent goes away when the parent dies */ | |
4994 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
4995 | _exit(EXIT_FAILURE); | |
4996 | ||
4997 | /* Check whether our parent died before we were able | |
4998 | * to set the death signal */ | |
4999 | if (getppid() != parent_pid) | |
5000 | _exit(EXIT_SUCCESS); | |
5001 | ||
5002 | /* Don't leak fds to the agent */ | |
9bdc770c | 5003 | close_all_fds(except, n_except); |
6bb92a16 LP |
5004 | |
5005 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5006 | stderr_is_tty = isatty(STDERR_FILENO); | |
5007 | ||
5008 | if (!stdout_is_tty || !stderr_is_tty) { | |
5009 | /* Detach from stdout/stderr. and reopen | |
5010 | * /dev/tty for them. This is important to | |
5011 | * ensure that when systemctl is started via | |
5012 | * popen() or a similar call that expects to | |
5013 | * read EOF we actually do generate EOF and | |
5014 | * not delay this indefinitely by because we | |
5015 | * keep an unused copy of stdin around. */ | |
5016 | fd = open("/dev/tty", O_WRONLY); | |
5017 | if (fd < 0) { | |
5018 | log_error("Failed to open /dev/tty: %m"); | |
5019 | _exit(EXIT_FAILURE); | |
5020 | } | |
5021 | ||
5022 | if (!stdout_is_tty) | |
5023 | dup2(fd, STDOUT_FILENO); | |
5024 | ||
5025 | if (!stderr_is_tty) | |
5026 | dup2(fd, STDERR_FILENO); | |
5027 | ||
5028 | if (fd > 2) | |
5029 | close(fd); | |
5030 | } | |
5031 | ||
5032 | /* Count arguments */ | |
5033 | va_start(ap, path); | |
5034 | for (n = 0; va_arg(ap, char*); n++) | |
5035 | ; | |
5036 | va_end(ap); | |
5037 | ||
5038 | /* Allocate strv */ | |
5039 | l = alloca(sizeof(char *) * (n + 1)); | |
5040 | ||
5041 | /* Fill in arguments */ | |
5042 | va_start(ap, path); | |
5043 | for (i = 0; i <= n; i++) | |
5044 | l[i] = va_arg(ap, char*); | |
5045 | va_end(ap); | |
5046 | ||
5047 | execv(path, l); | |
5048 | _exit(EXIT_FAILURE); | |
5049 | } | |
68faf98c LP |
5050 | |
5051 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5052 | struct rlimit highest, fixed; | |
5053 | ||
5054 | assert(rlim); | |
5055 | ||
5056 | if (setrlimit(resource, rlim) >= 0) | |
5057 | return 0; | |
5058 | ||
5059 | if (errno != EPERM) | |
5060 | return -errno; | |
5061 | ||
5062 | /* So we failed to set the desired setrlimit, then let's try | |
5063 | * to get as close as we can */ | |
5064 | assert_se(getrlimit(resource, &highest) == 0); | |
5065 | ||
5066 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5067 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5068 | ||
5069 | if (setrlimit(resource, &fixed) < 0) | |
5070 | return -errno; | |
5071 | ||
5072 | return 0; | |
5073 | } | |
3d9a4122 | 5074 | |
ab94af92 | 5075 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
49aa47c7 LP |
5076 | _cleanup_fclose_ FILE *f = NULL; |
5077 | char *value = NULL; | |
ab94af92 | 5078 | int r; |
ab94af92 LP |
5079 | bool done = false; |
5080 | size_t l; | |
49aa47c7 | 5081 | const char *path; |
ab94af92 | 5082 | |
49aa47c7 | 5083 | assert(pid >= 0); |
ab94af92 LP |
5084 | assert(field); |
5085 | assert(_value); | |
5086 | ||
b68fa010 | 5087 | path = procfs_file_alloca(pid, "environ"); |
ab94af92 LP |
5088 | |
5089 | f = fopen(path, "re"); | |
5090 | if (!f) | |
5091 | return -errno; | |
5092 | ||
5093 | l = strlen(field); | |
5094 | r = 0; | |
5095 | ||
5096 | do { | |
5097 | char line[LINE_MAX]; | |
5098 | unsigned i; | |
5099 | ||
5100 | for (i = 0; i < sizeof(line)-1; i++) { | |
5101 | int c; | |
5102 | ||
5103 | c = getc(f); | |
5104 | if (_unlikely_(c == EOF)) { | |
5105 | done = true; | |
5106 | break; | |
5107 | } else if (c == 0) | |
5108 | break; | |
5109 | ||
5110 | line[i] = c; | |
5111 | } | |
5112 | line[i] = 0; | |
5113 | ||
5114 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5115 | value = strdup(line + l + 1); | |
49aa47c7 LP |
5116 | if (!value) |
5117 | return -ENOMEM; | |
ab94af92 LP |
5118 | |
5119 | r = 1; | |
5120 | break; | |
5121 | } | |
5122 | ||
5123 | } while (!done); | |
5124 | ||
49aa47c7 | 5125 | *_value = value; |
ab94af92 LP |
5126 | return r; |
5127 | } | |
d889a206 | 5128 | |
49dbfa7b LP |
5129 | bool is_valid_documentation_url(const char *url) { |
5130 | assert(url); | |
5131 | ||
5132 | if (startswith(url, "http://") && url[7]) | |
5133 | return true; | |
5134 | ||
5135 | if (startswith(url, "https://") && url[8]) | |
5136 | return true; | |
5137 | ||
5138 | if (startswith(url, "file:") && url[5]) | |
5139 | return true; | |
5140 | ||
5141 | if (startswith(url, "info:") && url[5]) | |
5142 | return true; | |
5143 | ||
5144 | if (startswith(url, "man:") && url[4]) | |
5145 | return true; | |
5146 | ||
5147 | return false; | |
5148 | } | |
9be346c9 HH |
5149 | |
5150 | bool in_initrd(void) { | |
73020ab2 | 5151 | static int saved = -1; |
825c6fe5 | 5152 | struct statfs s; |
8f33b5b8 | 5153 | |
825c6fe5 LP |
5154 | if (saved >= 0) |
5155 | return saved; | |
5156 | ||
5157 | /* We make two checks here: | |
5158 | * | |
5159 | * 1. the flag file /etc/initrd-release must exist | |
5160 | * 2. the root file system must be a memory file system | |
5161 | * | |
5162 | * The second check is extra paranoia, since misdetecting an | |
5163 | * initrd can have bad bad consequences due the initrd | |
5164 | * emptying when transititioning to the main systemd. | |
5165 | */ | |
5166 | ||
5167 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5168 | statfs("/", &s) >= 0 && | |
943aad8c | 5169 | is_temporary_fs(&s); |
9be346c9 | 5170 | |
8f33b5b8 | 5171 | return saved; |
9be346c9 | 5172 | } |
069cfc85 LP |
5173 | |
5174 | void warn_melody(void) { | |
e67f47e5 | 5175 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5176 | |
5177 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5178 | if (fd < 0) | |
5179 | return; | |
5180 | ||
040f18ea | 5181 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5182 | |
5183 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
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, (int)(1193180/220)); | |
5190 | usleep(125*USEC_PER_MSEC); | |
5191 | ||
5192 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5193 | } |
cd3bd60a LP |
5194 | |
5195 | int make_console_stdio(void) { | |
5196 | int fd, r; | |
5197 | ||
5198 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5199 | ||
5200 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5201 | if (fd < 0) { | |
5202 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5203 | return fd; | |
5204 | } | |
5205 | ||
5206 | r = make_stdio(fd); | |
5207 | if (r < 0) { | |
5208 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5209 | return r; | |
5210 | } | |
5211 | ||
5212 | return 0; | |
5213 | } | |
7c5f152a LP |
5214 | |
5215 | int get_home_dir(char **_h) { | |
2cfbd749 | 5216 | struct passwd *p; |
7c5f152a | 5217 | const char *e; |
2cfbd749 | 5218 | char *h; |
7c5f152a | 5219 | uid_t u; |
7c5f152a LP |
5220 | |
5221 | assert(_h); | |
5222 | ||
5223 | /* Take the user specified one */ | |
5224 | e = getenv("HOME"); | |
5225 | if (e) { | |
5226 | h = strdup(e); | |
5227 | if (!h) | |
5228 | return -ENOMEM; | |
5229 | ||
5230 | *_h = h; | |
5231 | return 0; | |
5232 | } | |
5233 | ||
5234 | /* Hardcode home directory for root to avoid NSS */ | |
5235 | u = getuid(); | |
5236 | if (u == 0) { | |
5237 | h = strdup("/root"); | |
5238 | if (!h) | |
5239 | return -ENOMEM; | |
5240 | ||
5241 | *_h = h; | |
5242 | return 0; | |
5243 | } | |
5244 | ||
5245 | /* Check the database... */ | |
5246 | errno = 0; | |
5247 | p = getpwuid(u); | |
5248 | if (!p) | |
bcb161b0 | 5249 | return errno > 0 ? -errno : -ESRCH; |
7c5f152a LP |
5250 | |
5251 | if (!path_is_absolute(p->pw_dir)) | |
5252 | return -EINVAL; | |
5253 | ||
5254 | h = strdup(p->pw_dir); | |
5255 | if (!h) | |
5256 | return -ENOMEM; | |
5257 | ||
5258 | *_h = h; | |
5259 | return 0; | |
5260 | } | |
5261 | ||
2cfbd749 LP |
5262 | int get_shell(char **_s) { |
5263 | struct passwd *p; | |
5264 | const char *e; | |
5265 | char *s; | |
5266 | uid_t u; | |
5267 | ||
5268 | assert(_s); | |
5269 | ||
5270 | /* Take the user specified one */ | |
5271 | e = getenv("SHELL"); | |
5272 | if (e) { | |
5273 | s = strdup(e); | |
5274 | if (!s) | |
5275 | return -ENOMEM; | |
5276 | ||
5277 | *_s = s; | |
5278 | return 0; | |
5279 | } | |
5280 | ||
5281 | /* Hardcode home directory for root to avoid NSS */ | |
5282 | u = getuid(); | |
5283 | if (u == 0) { | |
5284 | s = strdup("/bin/sh"); | |
5285 | if (!s) | |
5286 | return -ENOMEM; | |
5287 | ||
5288 | *_s = s; | |
5289 | return 0; | |
5290 | } | |
5291 | ||
5292 | /* Check the database... */ | |
5293 | errno = 0; | |
5294 | p = getpwuid(u); | |
5295 | if (!p) | |
5296 | return errno > 0 ? -errno : -ESRCH; | |
5297 | ||
5298 | if (!path_is_absolute(p->pw_shell)) | |
5299 | return -EINVAL; | |
5300 | ||
5301 | s = strdup(p->pw_shell); | |
5302 | if (!s) | |
5303 | return -ENOMEM; | |
5304 | ||
5305 | *_s = s; | |
5306 | return 0; | |
5307 | } | |
5308 | ||
0b507b17 LP |
5309 | bool filename_is_safe(const char *p) { |
5310 | ||
5311 | if (isempty(p)) | |
5312 | return false; | |
5313 | ||
5314 | if (strchr(p, '/')) | |
5315 | return false; | |
5316 | ||
5317 | if (streq(p, ".")) | |
5318 | return false; | |
5319 | ||
5320 | if (streq(p, "..")) | |
5321 | return false; | |
5322 | ||
5323 | if (strlen(p) > FILENAME_MAX) | |
5324 | return false; | |
5325 | ||
5326 | return true; | |
5327 | } | |
5328 | ||
5329 | bool string_is_safe(const char *p) { | |
5330 | const char *t; | |
5331 | ||
5332 | assert(p); | |
5333 | ||
5334 | for (t = p; *t; t++) { | |
01539d6e | 5335 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5336 | return false; |
5337 | ||
011afa76 | 5338 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5339 | return false; |
5340 | } | |
5341 | ||
5342 | return true; | |
5343 | } | |
cfbc22ab | 5344 | |
ac4c8d6d ZJS |
5345 | /** |
5346 | * Check if a string contains control characters. | |
5347 | * Spaces and tabs are not considered control characters. | |
5348 | */ | |
4d1a6904 LP |
5349 | bool string_has_cc(const char *p) { |
5350 | const char *t; | |
5351 | ||
5352 | assert(p); | |
5353 | ||
5354 | for (t = p; *t; t++) | |
da2620a5 | 5355 | if (*t > 0 && *t < ' ' && *t != '\t') |
4d1a6904 LP |
5356 | return true; |
5357 | ||
5358 | return false; | |
5359 | } | |
5360 | ||
e884315e LP |
5361 | bool path_is_safe(const char *p) { |
5362 | ||
5363 | if (isempty(p)) | |
5364 | return false; | |
5365 | ||
5366 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5367 | return false; | |
5368 | ||
5369 | if (strlen(p) > PATH_MAX) | |
5370 | return false; | |
5371 | ||
5372 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5373 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5374 | return false; | |
5375 | ||
5376 | if (strstr(p, "//")) | |
5377 | return false; | |
5378 | ||
5379 | return true; | |
5380 | } | |
5381 | ||
a9e12476 KS |
5382 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5383 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5384 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5385 | size_t l, u, idx; |
5386 | const void *p; | |
5387 | int comparison; | |
5388 | ||
5389 | l = 0; | |
5390 | u = nmemb; | |
5391 | while (l < u) { | |
5392 | idx = (l + u) / 2; | |
5393 | p = (void *)(((const char *) base) + (idx * size)); | |
5394 | comparison = compar(key, p, arg); | |
5395 | if (comparison < 0) | |
5396 | u = idx; | |
5397 | else if (comparison > 0) | |
5398 | l = idx + 1; | |
5399 | else | |
5400 | return (void *)p; | |
5401 | } | |
5402 | return NULL; | |
5403 | } | |
09017585 MS |
5404 | |
5405 | bool is_locale_utf8(void) { | |
5406 | const char *set; | |
5407 | static int cached_answer = -1; | |
5408 | ||
5409 | if (cached_answer >= 0) | |
5410 | goto out; | |
5411 | ||
5412 | if (!setlocale(LC_ALL, "")) { | |
5413 | cached_answer = true; | |
5414 | goto out; | |
5415 | } | |
5416 | ||
5417 | set = nl_langinfo(CODESET); | |
5418 | if (!set) { | |
5419 | cached_answer = true; | |
5420 | goto out; | |
5421 | } | |
5422 | ||
f168c273 | 5423 | if (streq(set, "UTF-8")) { |
fee79e01 HH |
5424 | cached_answer = true; |
5425 | goto out; | |
5426 | } | |
5427 | ||
6cf2f1d9 HH |
5428 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
5429 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
5430 | set = setlocale(LC_CTYPE, NULL); |
5431 | if (!set) { | |
5432 | cached_answer = true; | |
5433 | goto out; | |
5434 | } | |
5435 | ||
6cf2f1d9 HH |
5436 | /* Check result, but ignore the result if C was set |
5437 | * explicitly. */ | |
5438 | cached_answer = | |
5439 | streq(set, "C") && | |
5440 | !getenv("LC_ALL") && | |
5441 | !getenv("LC_CTYPE") && | |
5442 | !getenv("LANG"); | |
fee79e01 | 5443 | |
09017585 | 5444 | out: |
6cf2f1d9 | 5445 | return (bool) cached_answer; |
09017585 | 5446 | } |
c339d977 MS |
5447 | |
5448 | const char *draw_special_char(DrawSpecialChar ch) { | |
5449 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
5450 | /* UTF-8 */ { | |
45a5ff0d MS |
5451 | [DRAW_TREE_VERT] = "\342\224\202 ", /* │ */ |
5452 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ | |
5453 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5454 | [DRAW_TREE_SPACE] = " ", /* */ |
45a5ff0d | 5455 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243 ", /* ‣ */ |
3deadb91 | 5456 | [DRAW_BLACK_CIRCLE] = "\342\227\217 ", /* ● */ |
c339d977 MS |
5457 | }, |
5458 | /* ASCII fallback */ { | |
45a5ff0d MS |
5459 | [DRAW_TREE_VERT] = "| ", |
5460 | [DRAW_TREE_BRANCH] = "|-", | |
5461 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5462 | [DRAW_TREE_SPACE] = " ", |
45a5ff0d | 5463 | [DRAW_TRIANGULAR_BULLET] = "> ", |
3deadb91 | 5464 | [DRAW_BLACK_CIRCLE] = "* ", |
c339d977 MS |
5465 | } |
5466 | }; | |
5467 | ||
5468 | return draw_table[!is_locale_utf8()][ch]; | |
5469 | } | |
409bc9c3 LP |
5470 | |
5471 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5472 | const char *f; | |
5473 | char *t, *r; | |
5474 | size_t l, old_len, new_len; | |
5475 | ||
5476 | assert(text); | |
5477 | assert(old_string); | |
5478 | assert(new_string); | |
5479 | ||
5480 | old_len = strlen(old_string); | |
5481 | new_len = strlen(new_string); | |
5482 | ||
5483 | l = strlen(text); | |
5484 | r = new(char, l+1); | |
5485 | if (!r) | |
5486 | return NULL; | |
5487 | ||
5488 | f = text; | |
5489 | t = r; | |
5490 | while (*f) { | |
5491 | char *a; | |
5492 | size_t d, nl; | |
5493 | ||
5494 | if (!startswith(f, old_string)) { | |
5495 | *(t++) = *(f++); | |
5496 | continue; | |
5497 | } | |
5498 | ||
5499 | d = t - r; | |
5500 | nl = l - old_len + new_len; | |
5501 | a = realloc(r, nl + 1); | |
5502 | if (!a) | |
5503 | goto oom; | |
5504 | ||
5505 | l = nl; | |
5506 | r = a; | |
5507 | t = r + d; | |
5508 | ||
5509 | t = stpcpy(t, new_string); | |
5510 | f += old_len; | |
5511 | } | |
5512 | ||
5513 | *t = 0; | |
5514 | return r; | |
5515 | ||
5516 | oom: | |
5517 | free(r); | |
5518 | return NULL; | |
5519 | } | |
e8bc0ea2 LP |
5520 | |
5521 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5522 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5523 | enum { |
5524 | STATE_OTHER, | |
5525 | STATE_ESCAPE, | |
5526 | STATE_BRACKET | |
5527 | } state = STATE_OTHER; | |
5528 | char *obuf = NULL; | |
5529 | size_t osz = 0, isz; | |
5530 | FILE *f; | |
5531 | ||
5532 | assert(ibuf); | |
5533 | assert(*ibuf); | |
5534 | ||
5535 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5536 | ||
5537 | isz = _isz ? *_isz : strlen(*ibuf); | |
5538 | ||
5539 | f = open_memstream(&obuf, &osz); | |
5540 | if (!f) | |
5541 | return NULL; | |
5542 | ||
5543 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5544 | ||
5545 | switch (state) { | |
5546 | ||
5547 | case STATE_OTHER: | |
5548 | if (i >= *ibuf + isz) /* EOT */ | |
5549 | break; | |
5550 | else if (*i == '\x1B') | |
5551 | state = STATE_ESCAPE; | |
5552 | else if (*i == '\t') | |
5553 | fputs(" ", f); | |
5554 | else | |
5555 | fputc(*i, f); | |
5556 | break; | |
5557 | ||
5558 | case STATE_ESCAPE: | |
5559 | if (i >= *ibuf + isz) { /* EOT */ | |
5560 | fputc('\x1B', f); | |
5561 | break; | |
5562 | } else if (*i == '[') { | |
5563 | state = STATE_BRACKET; | |
5564 | begin = i + 1; | |
5565 | } else { | |
5566 | fputc('\x1B', f); | |
5567 | fputc(*i, f); | |
5568 | state = STATE_OTHER; | |
5569 | } | |
5570 | ||
5571 | break; | |
5572 | ||
5573 | case STATE_BRACKET: | |
5574 | ||
5575 | if (i >= *ibuf + isz || /* EOT */ | |
5576 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5577 | fputc('\x1B', f); | |
5578 | fputc('[', f); | |
5579 | state = STATE_OTHER; | |
5580 | i = begin-1; | |
5581 | } else if (*i == 'm') | |
5582 | state = STATE_OTHER; | |
5583 | break; | |
5584 | } | |
5585 | } | |
5586 | ||
5587 | if (ferror(f)) { | |
5588 | fclose(f); | |
5589 | free(obuf); | |
5590 | return NULL; | |
5591 | } | |
5592 | ||
5593 | fclose(f); | |
5594 | ||
5595 | free(*ibuf); | |
5596 | *ibuf = obuf; | |
5597 | ||
5598 | if (_isz) | |
5599 | *_isz = osz; | |
5600 | ||
5601 | return obuf; | |
5602 | } | |
240dbaa4 LP |
5603 | |
5604 | int on_ac_power(void) { | |
5605 | bool found_offline = false, found_online = false; | |
5606 | _cleanup_closedir_ DIR *d = NULL; | |
5607 | ||
5608 | d = opendir("/sys/class/power_supply"); | |
5609 | if (!d) | |
5610 | return -errno; | |
5611 | ||
5612 | for (;;) { | |
5613 | struct dirent *de; | |
240dbaa4 LP |
5614 | _cleanup_close_ int fd = -1, device = -1; |
5615 | char contents[6]; | |
5616 | ssize_t n; | |
240dbaa4 | 5617 | |
3fd11280 FW |
5618 | errno = 0; |
5619 | de = readdir(d); | |
5620 | if (!de && errno != 0) | |
5621 | return -errno; | |
240dbaa4 LP |
5622 | |
5623 | if (!de) | |
5624 | break; | |
5625 | ||
5626 | if (ignore_file(de->d_name)) | |
5627 | continue; | |
5628 | ||
5629 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5630 | if (device < 0) { | |
5631 | if (errno == ENOENT || errno == ENOTDIR) | |
5632 | continue; | |
5633 | ||
5634 | return -errno; | |
5635 | } | |
5636 | ||
5637 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5638 | if (fd < 0) { | |
5639 | if (errno == ENOENT) | |
5640 | continue; | |
5641 | ||
5642 | return -errno; | |
5643 | } | |
5644 | ||
5645 | n = read(fd, contents, sizeof(contents)); | |
5646 | if (n < 0) | |
5647 | return -errno; | |
5648 | ||
5649 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5650 | continue; | |
5651 | ||
5652 | close_nointr_nofail(fd); | |
5653 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5654 | if (fd < 0) { | |
5655 | if (errno == ENOENT) | |
5656 | continue; | |
5657 | ||
5658 | return -errno; | |
5659 | } | |
5660 | ||
5661 | n = read(fd, contents, sizeof(contents)); | |
5662 | if (n < 0) | |
5663 | return -errno; | |
5664 | ||
5665 | if (n != 2 || contents[1] != '\n') | |
5666 | return -EIO; | |
5667 | ||
5668 | if (contents[0] == '1') { | |
5669 | found_online = true; | |
5670 | break; | |
5671 | } else if (contents[0] == '0') | |
5672 | found_offline = true; | |
5673 | else | |
5674 | return -EIO; | |
5675 | } | |
5676 | ||
5677 | return found_online || !found_offline; | |
5678 | } | |
fabe5c0e LP |
5679 | |
5680 | static int search_and_fopen_internal(const char *path, const char *mode, char **search, FILE **_f) { | |
5681 | char **i; | |
5682 | ||
5683 | assert(path); | |
5684 | assert(mode); | |
5685 | assert(_f); | |
5686 | ||
112cfb18 | 5687 | if (!path_strv_canonicalize_absolute_uniq(search, NULL)) |
fabe5c0e LP |
5688 | return -ENOMEM; |
5689 | ||
5690 | STRV_FOREACH(i, search) { | |
5691 | _cleanup_free_ char *p = NULL; | |
5692 | FILE *f; | |
5693 | ||
5694 | p = strjoin(*i, "/", path, NULL); | |
5695 | if (!p) | |
5696 | return -ENOMEM; | |
5697 | ||
5698 | f = fopen(p, mode); | |
5699 | if (f) { | |
5700 | *_f = f; | |
5701 | return 0; | |
5702 | } | |
5703 | ||
5704 | if (errno != ENOENT) | |
5705 | return -errno; | |
5706 | } | |
5707 | ||
5708 | return -ENOENT; | |
5709 | } | |
5710 | ||
5711 | int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f) { | |
5712 | _cleanup_strv_free_ char **copy = NULL; | |
5713 | ||
5714 | assert(path); | |
5715 | assert(mode); | |
5716 | assert(_f); | |
5717 | ||
5718 | if (path_is_absolute(path)) { | |
5719 | FILE *f; | |
5720 | ||
5721 | f = fopen(path, mode); | |
5722 | if (f) { | |
5723 | *_f = f; | |
5724 | return 0; | |
5725 | } | |
5726 | ||
5727 | return -errno; | |
5728 | } | |
5729 | ||
5730 | copy = strv_copy((char**) search); | |
5731 | if (!copy) | |
5732 | return -ENOMEM; | |
5733 | ||
5734 | return search_and_fopen_internal(path, mode, copy, _f); | |
5735 | } | |
5736 | ||
5737 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f) { | |
5738 | _cleanup_strv_free_ char **s = NULL; | |
5739 | ||
5740 | if (path_is_absolute(path)) { | |
5741 | FILE *f; | |
5742 | ||
5743 | f = fopen(path, mode); | |
5744 | if (f) { | |
5745 | *_f = f; | |
5746 | return 0; | |
5747 | } | |
5748 | ||
5749 | return -errno; | |
5750 | } | |
5751 | ||
5752 | s = strv_split_nulstr(search); | |
5753 | if (!s) | |
5754 | return -ENOMEM; | |
5755 | ||
5756 | return search_and_fopen_internal(path, mode, s, _f); | |
5757 | } | |
c17ec25e | 5758 | |
66e35261 LP |
5759 | char *strextend(char **x, ...) { |
5760 | va_list ap; | |
5761 | size_t f, l; | |
5762 | char *r, *p; | |
5763 | ||
5764 | assert(x); | |
5765 | ||
5766 | l = f = *x ? strlen(*x) : 0; | |
5767 | ||
5768 | va_start(ap, x); | |
5769 | for (;;) { | |
5770 | const char *t; | |
5771 | size_t n; | |
5772 | ||
5773 | t = va_arg(ap, const char *); | |
5774 | if (!t) | |
5775 | break; | |
5776 | ||
5777 | n = strlen(t); | |
5778 | if (n > ((size_t) -1) - l) { | |
5779 | va_end(ap); | |
5780 | return NULL; | |
5781 | } | |
5782 | ||
5783 | l += n; | |
5784 | } | |
5785 | va_end(ap); | |
5786 | ||
5787 | r = realloc(*x, l+1); | |
5788 | if (!r) | |
5789 | return NULL; | |
5790 | ||
5791 | p = r + f; | |
5792 | ||
5793 | va_start(ap, x); | |
5794 | for (;;) { | |
5795 | const char *t; | |
5796 | ||
5797 | t = va_arg(ap, const char *); | |
5798 | if (!t) | |
5799 | break; | |
5800 | ||
5801 | p = stpcpy(p, t); | |
5802 | } | |
5803 | va_end(ap); | |
5804 | ||
5805 | *p = 0; | |
5806 | *x = r; | |
5807 | ||
5808 | return r + l; | |
5809 | } | |
9a17484d LP |
5810 | |
5811 | char *strrep(const char *s, unsigned n) { | |
5812 | size_t l; | |
5813 | char *r, *p; | |
5814 | unsigned i; | |
5815 | ||
5816 | assert(s); | |
5817 | ||
5818 | l = strlen(s); | |
5819 | p = r = malloc(l * n + 1); | |
5820 | if (!r) | |
5821 | return NULL; | |
5822 | ||
5823 | for (i = 0; i < n; i++) | |
5824 | p = stpcpy(p, s); | |
5825 | ||
5826 | *p = 0; | |
5827 | return r; | |
5828 | } | |
392d5b37 LP |
5829 | |
5830 | void* greedy_realloc(void **p, size_t *allocated, size_t need) { | |
5831 | size_t a; | |
5832 | void *q; | |
5833 | ||
98088803 | 5834 | assert(p); |
e93c33d4 SL |
5835 | assert(allocated); |
5836 | ||
392d5b37 LP |
5837 | if (*allocated >= need) |
5838 | return *p; | |
5839 | ||
9607d947 | 5840 | a = MAX(64u, need * 2); |
98088803 LP |
5841 | |
5842 | /* check for overflows */ | |
5843 | if (a < need) | |
5844 | return NULL; | |
5845 | ||
392d5b37 LP |
5846 | q = realloc(*p, a); |
5847 | if (!q) | |
5848 | return NULL; | |
5849 | ||
5850 | *p = q; | |
5851 | *allocated = a; | |
5852 | return q; | |
5853 | } | |
aa96c6cb | 5854 | |
4545a231 | 5855 | void* greedy_realloc0(void **p, size_t *allocated, size_t need) { |
98088803 | 5856 | size_t prev; |
4545a231 DH |
5857 | uint8_t *q; |
5858 | ||
98088803 LP |
5859 | assert(p); |
5860 | assert(allocated); | |
5861 | ||
5862 | prev = *allocated; | |
5863 | ||
4545a231 DH |
5864 | q = greedy_realloc(p, allocated, need); |
5865 | if (!q) | |
5866 | return NULL; | |
5867 | ||
5868 | if (*allocated > prev) | |
29804cc1 | 5869 | memzero(&q[prev], *allocated - prev); |
4545a231 DH |
5870 | |
5871 | return q; | |
5872 | } | |
5873 | ||
aa96c6cb LP |
5874 | bool id128_is_valid(const char *s) { |
5875 | size_t i, l; | |
5876 | ||
5877 | l = strlen(s); | |
5878 | if (l == 32) { | |
5879 | ||
5880 | /* Simple formatted 128bit hex string */ | |
5881 | ||
5882 | for (i = 0; i < l; i++) { | |
5883 | char c = s[i]; | |
5884 | ||
5885 | if (!(c >= '0' && c <= '9') && | |
5886 | !(c >= 'a' && c <= 'z') && | |
5887 | !(c >= 'A' && c <= 'Z')) | |
5888 | return false; | |
5889 | } | |
5890 | ||
5891 | } else if (l == 36) { | |
5892 | ||
5893 | /* Formatted UUID */ | |
5894 | ||
5895 | for (i = 0; i < l; i++) { | |
5896 | char c = s[i]; | |
5897 | ||
5898 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
5899 | if (c != '-') | |
5900 | return false; | |
5901 | } else { | |
5902 | if (!(c >= '0' && c <= '9') && | |
5903 | !(c >= 'a' && c <= 'z') && | |
5904 | !(c >= 'A' && c <= 'Z')) | |
5905 | return false; | |
5906 | } | |
5907 | } | |
5908 | ||
5909 | } else | |
5910 | return false; | |
5911 | ||
5912 | return true; | |
5913 | } | |
7085053a | 5914 | |
d4ac85c6 LP |
5915 | int split_pair(const char *s, const char *sep, char **l, char **r) { |
5916 | char *x, *a, *b; | |
5917 | ||
5918 | assert(s); | |
5919 | assert(sep); | |
5920 | assert(l); | |
5921 | assert(r); | |
5922 | ||
5923 | if (isempty(sep)) | |
5924 | return -EINVAL; | |
5925 | ||
5926 | x = strstr(s, sep); | |
5927 | if (!x) | |
5928 | return -EINVAL; | |
5929 | ||
5930 | a = strndup(s, x - s); | |
5931 | if (!a) | |
5932 | return -ENOMEM; | |
5933 | ||
5934 | b = strdup(x + strlen(sep)); | |
5935 | if (!b) { | |
5936 | free(a); | |
5937 | return -ENOMEM; | |
5938 | } | |
5939 | ||
5940 | *l = a; | |
5941 | *r = b; | |
5942 | ||
5943 | return 0; | |
5944 | } | |
295edddf | 5945 | |
74df0fca | 5946 | int shall_restore_state(void) { |
295edddf TG |
5947 | _cleanup_free_ char *line; |
5948 | char *w, *state; | |
295edddf | 5949 | size_t l; |
74df0fca | 5950 | int r; |
295edddf | 5951 | |
74df0fca LP |
5952 | r = proc_cmdline(&line); |
5953 | if (r < 0) | |
5954 | return r; | |
5955 | if (r == 0) /* Container ... */ | |
5956 | return 1; | |
295edddf | 5957 | |
74df0fca | 5958 | FOREACH_WORD_QUOTED(w, l, line, state) |
85ca9433 | 5959 | if (l == 23 && strneq(w, "systemd.restore_state=0", 23)) |
74df0fca LP |
5960 | return 0; |
5961 | ||
5962 | return 1; | |
5963 | } | |
5964 | ||
5965 | int proc_cmdline(char **ret) { | |
5966 | int r; | |
5967 | ||
5968 | if (detect_container(NULL) > 0) { | |
39883f62 | 5969 | char *buf = NULL, *p; |
02bb6cda LP |
5970 | size_t sz = 0; |
5971 | ||
5972 | r = read_full_file("/proc/1/cmdline", &buf, &sz); | |
5973 | if (r < 0) | |
5974 | return r; | |
5975 | ||
5976 | for (p = buf; p + 1 < buf + sz; p++) | |
5977 | if (*p == 0) | |
5978 | *p = ' '; | |
5979 | ||
5980 | *p = 0; | |
5981 | *ret = buf; | |
5982 | return 1; | |
295edddf TG |
5983 | } |
5984 | ||
74df0fca LP |
5985 | r = read_one_line_file("/proc/cmdline", ret); |
5986 | if (r < 0) | |
5987 | return r; | |
295edddf | 5988 | |
74df0fca | 5989 | return 1; |
295edddf | 5990 | } |
bc9fd78c | 5991 | |
141a79f4 ZJS |
5992 | int parse_proc_cmdline(int (*parse_word)(const char *word)) { |
5993 | _cleanup_free_ char *line = NULL; | |
5994 | char *w, *state; | |
5995 | size_t l; | |
5996 | int r; | |
5997 | ||
5998 | r = proc_cmdline(&line); | |
5999 | if (r < 0) | |
6000 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); | |
6001 | if (r <= 0) | |
6002 | return 0; | |
6003 | ||
6004 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
6005 | _cleanup_free_ char *word; | |
6006 | ||
6007 | word = strndup(w, l); | |
6008 | if (!word) | |
6009 | return log_oom(); | |
6010 | ||
6011 | r = parse_word(word); | |
6012 | if (r < 0) { | |
6013 | log_error("Failed on cmdline argument %s: %s", word, strerror(-r)); | |
6014 | return r; | |
6015 | } | |
6016 | } | |
6017 | ||
6018 | return 0; | |
6019 | } | |
6020 | ||
bc9fd78c LP |
6021 | int container_get_leader(const char *machine, pid_t *pid) { |
6022 | _cleanup_free_ char *s = NULL, *class = NULL; | |
6023 | const char *p; | |
6024 | pid_t leader; | |
6025 | int r; | |
6026 | ||
6027 | assert(machine); | |
6028 | assert(pid); | |
6029 | ||
6030 | p = strappenda("/run/systemd/machines/", machine); | |
6031 | r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); | |
6032 | if (r == -ENOENT) | |
6033 | return -EHOSTDOWN; | |
6034 | if (r < 0) | |
6035 | return r; | |
6036 | if (!s) | |
6037 | return -EIO; | |
6038 | ||
6039 | if (!streq_ptr(class, "container")) | |
6040 | return -EIO; | |
6041 | ||
6042 | r = parse_pid(s, &leader); | |
6043 | if (r < 0) | |
6044 | return r; | |
6045 | if (leader <= 1) | |
6046 | return -EIO; | |
6047 | ||
6048 | *pid = leader; | |
6049 | return 0; | |
6050 | } | |
6051 | ||
a4475f57 LP |
6052 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd) { |
6053 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1; | |
6054 | const char *pidns, *mntns, *root; | |
bc9fd78c LP |
6055 | int rfd; |
6056 | ||
6057 | assert(pid >= 0); | |
a4475f57 LP |
6058 | assert(pidns_fd); |
6059 | assert(mntns_fd); | |
bc9fd78c LP |
6060 | assert(root_fd); |
6061 | ||
a4475f57 LP |
6062 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
6063 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6064 | if (mntnsfd < 0) | |
6065 | return -errno; | |
6066 | ||
6067 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
6068 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6069 | if (pidnsfd < 0) | |
bc9fd78c LP |
6070 | return -errno; |
6071 | ||
6072 | root = procfs_file_alloca(pid, "root"); | |
6073 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
6074 | if (rfd < 0) | |
6075 | return -errno; | |
6076 | ||
a4475f57 LP |
6077 | *pidns_fd = pidnsfd; |
6078 | *mntns_fd = mntnsfd; | |
bc9fd78c | 6079 | *root_fd = rfd; |
a4475f57 LP |
6080 | pidnsfd = -1; |
6081 | mntnsfd = -1; | |
bc9fd78c LP |
6082 | |
6083 | return 0; | |
6084 | } | |
6085 | ||
a4475f57 LP |
6086 | int namespace_enter(int pidns_fd, int mntns_fd, int root_fd) { |
6087 | assert(pidns_fd >= 0); | |
6088 | assert(mntns_fd >= 0); | |
bc9fd78c LP |
6089 | assert(root_fd >= 0); |
6090 | ||
a4475f57 LP |
6091 | if (setns(pidns_fd, CLONE_NEWPID) < 0) |
6092 | return -errno; | |
6093 | ||
6094 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
bc9fd78c LP |
6095 | return -errno; |
6096 | ||
6097 | if (fchdir(root_fd) < 0) | |
6098 | return -errno; | |
6099 | ||
6100 | if (chroot(".") < 0) | |
6101 | return -errno; | |
6102 | ||
5e2b3214 LP |
6103 | if (setresgid(0, 0, 0) < 0) |
6104 | return -errno; | |
6105 | ||
6106 | if (setresuid(0, 0, 0) < 0) | |
6107 | return -errno; | |
6108 | ||
bc9fd78c LP |
6109 | return 0; |
6110 | } | |
bf108e55 | 6111 | |
9f5650ae LP |
6112 | bool pid_is_unwaited(pid_t pid) { |
6113 | /* Checks whether a PID is still valid at all, including a zombie */ | |
6114 | ||
bf108e55 LP |
6115 | if (pid <= 0) |
6116 | return false; | |
6117 | ||
6118 | if (kill(pid, 0) >= 0) | |
6119 | return true; | |
6120 | ||
6121 | return errno != ESRCH; | |
6122 | } | |
eff05270 | 6123 | |
9f5650ae LP |
6124 | bool pid_is_alive(pid_t pid) { |
6125 | int r; | |
6126 | ||
6127 | /* Checks whether a PID is still valid and not a zombie */ | |
6128 | ||
6129 | if (pid <= 0) | |
6130 | return false; | |
6131 | ||
6132 | r = get_process_state(pid); | |
6133 | if (r == -ENOENT || r == 'Z') | |
6134 | return false; | |
6135 | ||
6136 | return true; | |
6137 | } | |
6138 | ||
eff05270 LP |
6139 | int getpeercred(int fd, struct ucred *ucred) { |
6140 | socklen_t n = sizeof(struct ucred); | |
6141 | struct ucred u; | |
6142 | int r; | |
6143 | ||
6144 | assert(fd >= 0); | |
6145 | assert(ucred); | |
6146 | ||
6147 | r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &u, &n); | |
6148 | if (r < 0) | |
6149 | return -errno; | |
6150 | ||
6151 | if (n != sizeof(struct ucred)) | |
6152 | return -EIO; | |
6153 | ||
6154 | /* Check if the data is actually useful and not suppressed due | |
6155 | * to namespacing issues */ | |
6156 | if (u.pid <= 0) | |
6157 | return -ENODATA; | |
6158 | ||
6159 | *ucred = u; | |
6160 | return 0; | |
6161 | } | |
6162 | ||
6163 | int getpeersec(int fd, char **ret) { | |
6164 | socklen_t n = 64; | |
6165 | char *s; | |
6166 | int r; | |
6167 | ||
6168 | assert(fd >= 0); | |
6169 | assert(ret); | |
6170 | ||
6171 | s = new0(char, n); | |
6172 | if (!s) | |
6173 | return -ENOMEM; | |
6174 | ||
6175 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6176 | if (r < 0) { | |
6177 | free(s); | |
6178 | ||
6179 | if (errno != ERANGE) | |
6180 | return -errno; | |
6181 | ||
6182 | s = new0(char, n); | |
6183 | if (!s) | |
6184 | return -ENOMEM; | |
6185 | ||
6186 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6187 | if (r < 0) { | |
6188 | free(s); | |
6189 | return -errno; | |
6190 | } | |
6191 | } | |
6192 | ||
ae98841e LP |
6193 | if (isempty(s)) { |
6194 | free(s); | |
6195 | return -ENOTSUP; | |
6196 | } | |
6197 | ||
eff05270 LP |
6198 | *ret = s; |
6199 | return 0; | |
6200 | } | |
8e33886e | 6201 | |
0f010ef2 | 6202 | /* This is much like like mkostemp() but is subject to umask(). */ |
65b3903f | 6203 | int mkostemp_safe(char *pattern, int flags) { |
2d5bdf5b | 6204 | _cleanup_umask_ mode_t u; |
0f010ef2 | 6205 | int fd; |
65b3903f | 6206 | |
d37a91e8 | 6207 | assert(pattern); |
65b3903f | 6208 | |
2d5bdf5b LP |
6209 | u = umask(077); |
6210 | ||
0f010ef2 ZJS |
6211 | fd = mkostemp(pattern, flags); |
6212 | if (fd < 0) | |
6213 | return -errno; | |
65b3903f | 6214 | |
0f010ef2 | 6215 | return fd; |
65b3903f ZJS |
6216 | } |
6217 | ||
8e33886e | 6218 | int open_tmpfile(const char *path, int flags) { |
8e33886e | 6219 | char *p; |
a6afc4ae LP |
6220 | int fd; |
6221 | ||
6222 | assert(path); | |
8e33886e ZJS |
6223 | |
6224 | #ifdef O_TMPFILE | |
7736202c LP |
6225 | /* Try O_TMPFILE first, if it is supported */ |
6226 | fd = open(path, flags|O_TMPFILE, S_IRUSR|S_IWUSR); | |
8e33886e ZJS |
6227 | if (fd >= 0) |
6228 | return fd; | |
6229 | #endif | |
7736202c LP |
6230 | |
6231 | /* Fall back to unguessable name + unlinking */ | |
8e33886e ZJS |
6232 | p = strappenda(path, "/systemd-tmp-XXXXXX"); |
6233 | ||
a6afc4ae | 6234 | fd = mkostemp_safe(p, flags); |
8e33886e | 6235 | if (fd < 0) |
65b3903f | 6236 | return fd; |
8e33886e ZJS |
6237 | |
6238 | unlink(p); | |
6239 | return fd; | |
6240 | } | |
fdb9161c LP |
6241 | |
6242 | int fd_warn_permissions(const char *path, int fd) { | |
6243 | struct stat st; | |
6244 | ||
6245 | if (fstat(fd, &st) < 0) | |
6246 | return -errno; | |
6247 | ||
6248 | if (st.st_mode & 0111) | |
6249 | log_warning("Configuration file %s is marked executable. Please remove executable permission bits. Proceeding anyway.", path); | |
6250 | ||
6251 | if (st.st_mode & 0002) | |
6252 | log_warning("Configuration file %s is marked world-writable. Please remove world writability permission bits. Proceeding anyway.", path); | |
6253 | ||
6254 | if (getpid() == 1 && (st.st_mode & 0044) != 0044) | |
6255 | log_warning("Configuration file %s is marked world-inaccessible. This has no effect as configuration data is accessible via APIs without restrictions. Proceeding anyway.", path); | |
6256 | ||
6257 | return 0; | |
6258 | } | |
6afc95b7 | 6259 | |
ac45f971 | 6260 | unsigned long personality_from_string(const char *p) { |
6afc95b7 LP |
6261 | |
6262 | /* Parse a personality specifier. We introduce our own | |
6263 | * identifiers that indicate specific ABIs, rather than just | |
6264 | * hints regarding the register size, since we want to keep | |
6265 | * things open for multiple locally supported ABIs for the | |
6266 | * same register size. We try to reuse the ABI identifiers | |
6267 | * used by libseccomp. */ | |
6268 | ||
6269 | #if defined(__x86_64__) | |
6270 | ||
6271 | if (streq(p, "x86")) | |
6272 | return PER_LINUX32; | |
6273 | ||
6274 | if (streq(p, "x86-64")) | |
6275 | return PER_LINUX; | |
6276 | ||
6277 | #elif defined(__i386__) | |
6278 | ||
6279 | if (streq(p, "x86")) | |
6280 | return PER_LINUX; | |
6281 | #endif | |
6282 | ||
6283 | /* personality(7) documents that 0xffffffffUL is used for | |
6284 | * querying the current personality, hence let's use that here | |
6285 | * as error indicator. */ | |
6286 | return 0xffffffffUL; | |
6287 | } | |
ac45f971 LP |
6288 | |
6289 | const char* personality_to_string(unsigned long p) { | |
6290 | ||
6291 | #if defined(__x86_64__) | |
6292 | ||
6293 | if (p == PER_LINUX32) | |
6294 | return "x86"; | |
6295 | ||
6296 | if (p == PER_LINUX) | |
6297 | return "x86-64"; | |
6298 | ||
6299 | #elif defined(__i386__) | |
6300 | ||
6301 | if (p == PER_LINUX) | |
6302 | return "x86"; | |
6303 | #endif | |
6304 | ||
6305 | return NULL; | |
6306 | } | |
1c231f56 LP |
6307 | |
6308 | uint64_t physical_memory(void) { | |
6309 | long mem; | |
6310 | ||
6311 | /* We return this as uint64_t in case we are running as 32bit | |
6312 | * process on a 64bit kernel with huge amounts of memory */ | |
6313 | ||
6314 | mem = sysconf(_SC_PHYS_PAGES); | |
6315 | assert(mem > 0); | |
6316 | ||
6317 | return (uint64_t) mem * (uint64_t) page_size(); | |
6318 | } |