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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
60918275 LP |
22 | #include <assert.h> |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
85261803 | 26 | #include <stdlib.h> |
034c6ed7 LP |
27 | #include <signal.h> |
28 | #include <stdio.h> | |
1dccbe19 LP |
29 | #include <syslog.h> |
30 | #include <sched.h> | |
31 | #include <sys/resource.h> | |
ef886c6a | 32 | #include <linux/sched.h> |
a9f5d454 LP |
33 | #include <sys/types.h> |
34 | #include <sys/stat.h> | |
3a0ecb08 | 35 | #include <fcntl.h> |
a0d40ac5 | 36 | #include <dirent.h> |
601f6a1e LP |
37 | #include <sys/ioctl.h> |
38 | #include <linux/vt.h> | |
39 | #include <linux/tiocl.h> | |
80876c20 LP |
40 | #include <termios.h> |
41 | #include <stdarg.h> | |
42 | #include <sys/inotify.h> | |
43 | #include <sys/poll.h> | |
8d567588 | 44 | #include <libgen.h> |
3177a7fa | 45 | #include <ctype.h> |
5b6319dc | 46 | #include <sys/prctl.h> |
ef2f1067 LP |
47 | #include <sys/utsname.h> |
48 | #include <pwd.h> | |
4fd5948e | 49 | #include <netinet/ip.h> |
3fe5e5d4 | 50 | #include <linux/kd.h> |
afea26ad | 51 | #include <dlfcn.h> |
2e78aa99 | 52 | #include <sys/wait.h> |
7948c4df | 53 | #include <sys/time.h> |
8092a428 | 54 | #include <glob.h> |
4b67834e | 55 | #include <grp.h> |
87d2c1ff | 56 | #include <sys/mman.h> |
825c6fe5 LP |
57 | #include <sys/vfs.h> |
58 | #include <linux/magic.h> | |
0b507b17 | 59 | #include <limits.h> |
09017585 MS |
60 | #include <langinfo.h> |
61 | #include <locale.h> | |
844ec79b | 62 | #include <libgen.h> |
60918275 LP |
63 | |
64 | #include "macro.h" | |
65 | #include "util.h" | |
1dccbe19 LP |
66 | #include "ioprio.h" |
67 | #include "missing.h" | |
a9f5d454 | 68 | #include "log.h" |
65d2ebdc | 69 | #include "strv.h" |
e51bc1a2 | 70 | #include "label.h" |
9eb977db | 71 | #include "path-util.h" |
d06dacd0 | 72 | #include "exit-status.h" |
83cc030f | 73 | #include "hashmap.h" |
4d1a6904 | 74 | #include "env-util.h" |
a5c32cff | 75 | #include "fileio.h" |
22f5f628 | 76 | #include "utf8.h" |
56cf987f | 77 | |
9a0e6896 LP |
78 | int saved_argc = 0; |
79 | char **saved_argv = NULL; | |
9086e840 | 80 | |
28917d7d | 81 | static volatile unsigned cached_columns = 0; |
ed757c0c | 82 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 83 | |
37f85e66 | 84 | size_t page_size(void) { |
85 | static __thread size_t pgsz = 0; | |
86 | long r; | |
87 | ||
87d2c1ff | 88 | if (_likely_(pgsz > 0)) |
37f85e66 | 89 | return pgsz; |
90 | ||
e67f47e5 LP |
91 | r = sysconf(_SC_PAGESIZE); |
92 | assert(r > 0); | |
37f85e66 | 93 | |
94 | pgsz = (size_t) r; | |
37f85e66 | 95 | return pgsz; |
96 | } | |
97 | ||
e05797fb LP |
98 | bool streq_ptr(const char *a, const char *b) { |
99 | ||
100 | /* Like streq(), but tries to make sense of NULL pointers */ | |
101 | ||
102 | if (a && b) | |
103 | return streq(a, b); | |
104 | ||
105 | if (!a && !b) | |
106 | return true; | |
107 | ||
108 | return false; | |
109 | } | |
110 | ||
8c7c140f | 111 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
112 | size_t sl, pl; |
113 | ||
114 | assert(s); | |
115 | assert(postfix); | |
116 | ||
117 | sl = strlen(s); | |
118 | pl = strlen(postfix); | |
119 | ||
d4d0d4db | 120 | if (pl == 0) |
8c7c140f | 121 | return (char*) s + sl; |
d4d0d4db | 122 | |
60918275 | 123 | if (sl < pl) |
8c7c140f LP |
124 | return NULL; |
125 | ||
126 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
127 | return NULL; | |
60918275 | 128 | |
8c7c140f | 129 | return (char*) s + sl - pl; |
60918275 LP |
130 | } |
131 | ||
79d6d816 LP |
132 | bool first_word(const char *s, const char *word) { |
133 | size_t sl, wl; | |
134 | ||
135 | assert(s); | |
136 | assert(word); | |
137 | ||
138 | sl = strlen(s); | |
139 | wl = strlen(word); | |
140 | ||
141 | if (sl < wl) | |
142 | return false; | |
143 | ||
d4d0d4db LP |
144 | if (wl == 0) |
145 | return true; | |
146 | ||
79d6d816 LP |
147 | if (memcmp(s, word, wl) != 0) |
148 | return false; | |
149 | ||
d4d0d4db LP |
150 | return s[wl] == 0 || |
151 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
152 | } |
153 | ||
42f4e3c4 | 154 | int close_nointr(int fd) { |
b0ee8068 | 155 | int r; |
60918275 | 156 | |
b0ee8068 CW |
157 | assert(fd >= 0); |
158 | r = close(fd); | |
159 | ||
160 | /* Just ignore EINTR; a retry loop is the wrong | |
161 | * thing to do on Linux. | |
162 | * | |
163 | * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html | |
164 | * https://bugzilla.gnome.org/show_bug.cgi?id=682819 | |
165 | * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR | |
166 | * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain | |
167 | */ | |
168 | if (_unlikely_(r < 0 && errno == EINTR)) | |
169 | return 0; | |
170 | else if (r >= 0) | |
171 | return r; | |
172 | else | |
173 | return -errno; | |
60918275 | 174 | } |
85261803 | 175 | |
85f136b5 | 176 | void close_nointr_nofail(int fd) { |
5c0aa72a | 177 | PROTECT_ERRNO; |
85f136b5 LP |
178 | |
179 | /* like close_nointr() but cannot fail, and guarantees errno | |
180 | * is unchanged */ | |
181 | ||
182 | assert_se(close_nointr(fd) == 0); | |
183 | } | |
184 | ||
5b6319dc LP |
185 | void close_many(const int fds[], unsigned n_fd) { |
186 | unsigned i; | |
187 | ||
2c93b4ef LP |
188 | assert(fds || n_fd <= 0); |
189 | ||
5b6319dc LP |
190 | for (i = 0; i < n_fd; i++) |
191 | close_nointr_nofail(fds[i]); | |
192 | } | |
193 | ||
4b73a0c0 LP |
194 | int unlink_noerrno(const char *path) { |
195 | PROTECT_ERRNO; | |
196 | int r; | |
197 | ||
198 | r = unlink(path); | |
199 | if (r < 0) | |
200 | return -errno; | |
201 | ||
202 | return 0; | |
203 | } | |
204 | ||
85261803 LP |
205 | int parse_boolean(const char *v) { |
206 | assert(v); | |
207 | ||
b43d1d01 | 208 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || strcaseeq(v, "on")) |
85261803 | 209 | return 1; |
b43d1d01 | 210 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || strcaseeq(v, "off")) |
85261803 LP |
211 | return 0; |
212 | ||
213 | return -EINVAL; | |
214 | } | |
215 | ||
3ba686c1 | 216 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 217 | unsigned long ul = 0; |
3ba686c1 LP |
218 | pid_t pid; |
219 | int r; | |
220 | ||
221 | assert(s); | |
222 | assert(ret_pid); | |
223 | ||
e67f47e5 LP |
224 | r = safe_atolu(s, &ul); |
225 | if (r < 0) | |
3ba686c1 LP |
226 | return r; |
227 | ||
228 | pid = (pid_t) ul; | |
229 | ||
230 | if ((unsigned long) pid != ul) | |
231 | return -ERANGE; | |
232 | ||
233 | if (pid <= 0) | |
234 | return -ERANGE; | |
235 | ||
236 | *ret_pid = pid; | |
237 | return 0; | |
238 | } | |
239 | ||
034a2a52 LP |
240 | int parse_uid(const char *s, uid_t* ret_uid) { |
241 | unsigned long ul = 0; | |
242 | uid_t uid; | |
243 | int r; | |
244 | ||
245 | assert(s); | |
246 | assert(ret_uid); | |
247 | ||
e67f47e5 LP |
248 | r = safe_atolu(s, &ul); |
249 | if (r < 0) | |
034a2a52 LP |
250 | return r; |
251 | ||
252 | uid = (uid_t) ul; | |
253 | ||
254 | if ((unsigned long) uid != ul) | |
255 | return -ERANGE; | |
256 | ||
257 | *ret_uid = uid; | |
258 | return 0; | |
259 | } | |
260 | ||
85261803 LP |
261 | int safe_atou(const char *s, unsigned *ret_u) { |
262 | char *x = NULL; | |
034c6ed7 | 263 | unsigned long l; |
85261803 LP |
264 | |
265 | assert(s); | |
266 | assert(ret_u); | |
267 | ||
268 | errno = 0; | |
269 | l = strtoul(s, &x, 0); | |
270 | ||
f3910003 | 271 | if (!x || x == s || *x || errno) |
48deb058 | 272 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 273 | |
034c6ed7 | 274 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
275 | return -ERANGE; |
276 | ||
277 | *ret_u = (unsigned) l; | |
278 | return 0; | |
279 | } | |
280 | ||
281 | int safe_atoi(const char *s, int *ret_i) { | |
282 | char *x = NULL; | |
034c6ed7 | 283 | long l; |
85261803 LP |
284 | |
285 | assert(s); | |
286 | assert(ret_i); | |
287 | ||
288 | errno = 0; | |
289 | l = strtol(s, &x, 0); | |
290 | ||
f3910003 | 291 | if (!x || x == s || *x || errno) |
48deb058 | 292 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 293 | |
034c6ed7 | 294 | if ((long) (int) l != l) |
85261803 LP |
295 | return -ERANGE; |
296 | ||
034c6ed7 LP |
297 | *ret_i = (int) l; |
298 | return 0; | |
299 | } | |
300 | ||
034c6ed7 LP |
301 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
302 | char *x = NULL; | |
303 | unsigned long long l; | |
304 | ||
305 | assert(s); | |
306 | assert(ret_llu); | |
307 | ||
308 | errno = 0; | |
309 | l = strtoull(s, &x, 0); | |
310 | ||
f3910003 | 311 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
312 | return errno ? -errno : -EINVAL; |
313 | ||
314 | *ret_llu = l; | |
315 | return 0; | |
316 | } | |
317 | ||
318 | int safe_atolli(const char *s, long long int *ret_lli) { | |
319 | char *x = NULL; | |
320 | long long l; | |
321 | ||
322 | assert(s); | |
323 | assert(ret_lli); | |
324 | ||
325 | errno = 0; | |
326 | l = strtoll(s, &x, 0); | |
327 | ||
f3910003 | 328 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
329 | return errno ? -errno : -EINVAL; |
330 | ||
331 | *ret_lli = l; | |
85261803 LP |
332 | return 0; |
333 | } | |
a41e8209 | 334 | |
f7900e25 TA |
335 | int safe_atod(const char *s, double *ret_d) { |
336 | char *x = NULL; | |
32b2634e | 337 | double d = 0; |
f7900e25 TA |
338 | |
339 | assert(s); | |
340 | assert(ret_d); | |
341 | ||
d6dd604b LP |
342 | RUN_WITH_LOCALE(LC_NUMERIC_MASK, "C") { |
343 | errno = 0; | |
344 | d = strtod(s, &x); | |
345 | } | |
f7900e25 TA |
346 | |
347 | if (!x || x == s || *x || errno) | |
348 | return errno ? -errno : -EINVAL; | |
349 | ||
350 | *ret_d = (double) d; | |
351 | return 0; | |
352 | } | |
353 | ||
a41e8209 | 354 | /* Split a string into words. */ |
65d2ebdc | 355 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
356 | char *current; |
357 | ||
358 | current = *state ? *state : (char*) c; | |
359 | ||
360 | if (!*current || *c == 0) | |
361 | return NULL; | |
362 | ||
65d2ebdc LP |
363 | current += strspn(current, separator); |
364 | *l = strcspn(current, separator); | |
82919e3d LP |
365 | *state = current+*l; |
366 | ||
367 | return (char*) current; | |
368 | } | |
369 | ||
034c6ed7 LP |
370 | /* Split a string into words, but consider strings enclosed in '' and |
371 | * "" as words even if they include spaces. */ | |
372 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
373 | char *current, *e; |
374 | bool escaped = false; | |
034c6ed7 LP |
375 | |
376 | current = *state ? *state : (char*) c; | |
377 | ||
378 | if (!*current || *c == 0) | |
379 | return NULL; | |
380 | ||
381 | current += strspn(current, WHITESPACE); | |
382 | ||
383 | if (*current == '\'') { | |
384 | current ++; | |
034c6ed7 | 385 | |
0bab36f2 LP |
386 | for (e = current; *e; e++) { |
387 | if (escaped) | |
388 | escaped = false; | |
389 | else if (*e == '\\') | |
390 | escaped = true; | |
391 | else if (*e == '\'') | |
392 | break; | |
393 | } | |
394 | ||
395 | *l = e-current; | |
396 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
397 | } else if (*current == '\"') { |
398 | current ++; | |
034c6ed7 | 399 | |
0bab36f2 LP |
400 | for (e = current; *e; e++) { |
401 | if (escaped) | |
402 | escaped = false; | |
403 | else if (*e == '\\') | |
404 | escaped = true; | |
405 | else if (*e == '\"') | |
406 | break; | |
407 | } | |
408 | ||
409 | *l = e-current; | |
410 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 411 | } else { |
0bab36f2 LP |
412 | for (e = current; *e; e++) { |
413 | if (escaped) | |
414 | escaped = false; | |
415 | else if (*e == '\\') | |
416 | escaped = true; | |
417 | else if (strchr(WHITESPACE, *e)) | |
418 | break; | |
419 | } | |
420 | *l = e-current; | |
421 | *state = e; | |
034c6ed7 LP |
422 | } |
423 | ||
424 | return (char*) current; | |
425 | } | |
426 | ||
034c6ed7 LP |
427 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
428 | int r; | |
2fbe635a | 429 | _cleanup_fclose_ FILE *f = NULL; |
49aa47c7 | 430 | char line[LINE_MAX]; |
bb00e604 | 431 | long unsigned ppid; |
49aa47c7 | 432 | const char *p; |
034c6ed7 | 433 | |
49aa47c7 | 434 | assert(pid >= 0); |
034c6ed7 LP |
435 | assert(_ppid); |
436 | ||
49aa47c7 LP |
437 | if (pid == 0) { |
438 | *_ppid = getppid(); | |
439 | return 0; | |
440 | } | |
034c6ed7 | 441 | |
49aa47c7 LP |
442 | p = procfs_file_alloca(pid, "stat"); |
443 | f = fopen(p, "re"); | |
2fbe635a | 444 | if (!f) |
034c6ed7 LP |
445 | return -errno; |
446 | ||
2fbe635a | 447 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 448 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
449 | return r; |
450 | } | |
451 | ||
034c6ed7 LP |
452 | /* Let's skip the pid and comm fields. The latter is enclosed |
453 | * in () but does not escape any () in its value, so let's | |
454 | * skip over it manually */ | |
455 | ||
2fbe635a LP |
456 | p = strrchr(line, ')'); |
457 | if (!p) | |
034c6ed7 LP |
458 | return -EIO; |
459 | ||
460 | p++; | |
461 | ||
462 | if (sscanf(p, " " | |
463 | "%*c " /* state */ | |
bb00e604 | 464 | "%lu ", /* ppid */ |
034c6ed7 LP |
465 | &ppid) != 1) |
466 | return -EIO; | |
467 | ||
bb00e604 | 468 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
469 | return -ERANGE; |
470 | ||
471 | *_ppid = (pid_t) ppid; | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
7640a5de | 476 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
e67f47e5 | 477 | _cleanup_fclose_ FILE *f = NULL; |
49aa47c7 LP |
478 | char line[LINE_MAX]; |
479 | const char *p; | |
7640a5de | 480 | |
49aa47c7 | 481 | assert(pid >= 0); |
7640a5de LP |
482 | assert(st); |
483 | ||
49aa47c7 LP |
484 | if (pid == 0) |
485 | p = "/proc/self/stat"; | |
486 | else | |
487 | p = procfs_file_alloca(pid, "stat"); | |
7640a5de | 488 | |
49aa47c7 | 489 | f = fopen(p, "re"); |
e67f47e5 | 490 | if (!f) |
7640a5de LP |
491 | return -errno; |
492 | ||
e67f47e5 LP |
493 | if (!fgets(line, sizeof(line), f)) { |
494 | if (ferror(f)) | |
495 | return -errno; | |
7640a5de | 496 | |
e67f47e5 LP |
497 | return -EIO; |
498 | } | |
7640a5de LP |
499 | |
500 | /* Let's skip the pid and comm fields. The latter is enclosed | |
501 | * in () but does not escape any () in its value, so let's | |
502 | * skip over it manually */ | |
503 | ||
e67f47e5 LP |
504 | p = strrchr(line, ')'); |
505 | if (!p) | |
7640a5de LP |
506 | return -EIO; |
507 | ||
508 | p++; | |
509 | ||
510 | if (sscanf(p, " " | |
511 | "%*c " /* state */ | |
512 | "%*d " /* ppid */ | |
513 | "%*d " /* pgrp */ | |
514 | "%*d " /* session */ | |
515 | "%*d " /* tty_nr */ | |
516 | "%*d " /* tpgid */ | |
517 | "%*u " /* flags */ | |
518 | "%*u " /* minflt */ | |
519 | "%*u " /* cminflt */ | |
520 | "%*u " /* majflt */ | |
521 | "%*u " /* cmajflt */ | |
522 | "%*u " /* utime */ | |
523 | "%*u " /* stime */ | |
524 | "%*d " /* cutime */ | |
525 | "%*d " /* cstime */ | |
526 | "%*d " /* priority */ | |
527 | "%*d " /* nice */ | |
528 | "%*d " /* num_threads */ | |
529 | "%*d " /* itrealvalue */ | |
530 | "%llu " /* starttime */, | |
531 | st) != 1) | |
532 | return -EIO; | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
34ca941c LP |
537 | int fchmod_umask(int fd, mode_t m) { |
538 | mode_t u; | |
539 | int r; | |
540 | ||
541 | u = umask(0777); | |
542 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
543 | umask(u); | |
544 | ||
545 | return r; | |
546 | } | |
547 | ||
7072ced8 LP |
548 | char *truncate_nl(char *s) { |
549 | assert(s); | |
550 | ||
551 | s[strcspn(s, NEWLINE)] = 0; | |
552 | return s; | |
553 | } | |
554 | ||
87d2c1ff | 555 | int get_process_comm(pid_t pid, char **name) { |
49aa47c7 | 556 | const char *p; |
7072ced8 | 557 | |
7072ced8 | 558 | assert(name); |
49aa47c7 | 559 | assert(pid >= 0); |
7072ced8 | 560 | |
87d2c1ff | 561 | if (pid == 0) |
49aa47c7 LP |
562 | p = "/proc/self/comm"; |
563 | else | |
564 | p = procfs_file_alloca(pid, "comm"); | |
7072ced8 | 565 | |
49aa47c7 | 566 | return read_one_line_file(p, name); |
7072ced8 LP |
567 | } |
568 | ||
87d2c1ff | 569 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
49aa47c7 | 570 | _cleanup_fclose_ FILE *f = NULL; |
9bdbc2e2 | 571 | char *r = NULL, *k; |
49aa47c7 | 572 | const char *p; |
c59760ee | 573 | int c; |
c59760ee | 574 | |
c59760ee | 575 | assert(line); |
49aa47c7 | 576 | assert(pid >= 0); |
c59760ee | 577 | |
87d2c1ff | 578 | if (pid == 0) |
49aa47c7 LP |
579 | p = "/proc/self/cmdline"; |
580 | else | |
581 | p = procfs_file_alloca(pid, "cmdline"); | |
c59760ee | 582 | |
49aa47c7 | 583 | f = fopen(p, "re"); |
c59760ee LP |
584 | if (!f) |
585 | return -errno; | |
49aa47c7 | 586 | |
9bdbc2e2 | 587 | if (max_length == 0) { |
49aa47c7 LP |
588 | size_t len = 0, allocated = 0; |
589 | ||
9bdbc2e2 | 590 | while ((c = getc(f)) != EOF) { |
49aa47c7 LP |
591 | |
592 | if (!GREEDY_REALLOC(r, allocated, len+2)) { | |
9bdbc2e2 | 593 | free(r); |
9bdbc2e2 LN |
594 | return -ENOMEM; |
595 | } | |
49aa47c7 LP |
596 | |
597 | r[len++] = isprint(c) ? c : ' '; | |
9bdbc2e2 | 598 | } |
49aa47c7 LP |
599 | |
600 | if (len > 0) | |
601 | r[len-1] = 0; | |
602 | ||
9bdbc2e2 LN |
603 | } else { |
604 | bool space = false; | |
605 | size_t left; | |
49aa47c7 | 606 | |
9bdbc2e2 | 607 | r = new(char, max_length); |
49aa47c7 | 608 | if (!r) |
9bdbc2e2 | 609 | return -ENOMEM; |
c59760ee | 610 | |
9bdbc2e2 LN |
611 | k = r; |
612 | left = max_length; | |
613 | while ((c = getc(f)) != EOF) { | |
c59760ee | 614 | |
9bdbc2e2 LN |
615 | if (isprint(c)) { |
616 | if (space) { | |
617 | if (left <= 4) | |
618 | break; | |
619 | ||
620 | *(k++) = ' '; | |
621 | left--; | |
622 | space = false; | |
623 | } | |
c59760ee | 624 | |
c59760ee LP |
625 | if (left <= 4) |
626 | break; | |
627 | ||
9bdbc2e2 | 628 | *(k++) = (char) c; |
057fbb58 | 629 | left--; |
9bdbc2e2 LN |
630 | } else |
631 | space = true; | |
632 | } | |
c59760ee | 633 | |
9bdbc2e2 LN |
634 | if (left <= 4) { |
635 | size_t n = MIN(left-1, 3U); | |
636 | memcpy(k, "...", n); | |
637 | k[n] = 0; | |
638 | } else | |
639 | *k = 0; | |
c59760ee LP |
640 | } |
641 | ||
35d2e7ec | 642 | /* Kernel threads have no argv[] */ |
9bdbc2e2 | 643 | if (r == NULL || r[0] == 0) { |
35d2e7ec LP |
644 | char *t; |
645 | int h; | |
646 | ||
647 | free(r); | |
648 | ||
87d2c1ff LP |
649 | if (!comm_fallback) |
650 | return -ENOENT; | |
651 | ||
652 | h = get_process_comm(pid, &t); | |
653 | if (h < 0) | |
35d2e7ec LP |
654 | return h; |
655 | ||
b7def684 | 656 | r = strjoin("[", t, "]", NULL); |
35d2e7ec LP |
657 | free(t); |
658 | ||
87d2c1ff | 659 | if (!r) |
35d2e7ec LP |
660 | return -ENOMEM; |
661 | } | |
fa776d8e | 662 | |
c59760ee LP |
663 | *line = r; |
664 | return 0; | |
665 | } | |
666 | ||
1e5678d0 | 667 | int is_kernel_thread(pid_t pid) { |
49aa47c7 | 668 | const char *p; |
1e5678d0 LP |
669 | size_t count; |
670 | char c; | |
671 | bool eof; | |
672 | FILE *f; | |
673 | ||
674 | if (pid == 0) | |
675 | return 0; | |
676 | ||
49aa47c7 | 677 | assert(pid > 0); |
1e5678d0 | 678 | |
49aa47c7 LP |
679 | p = procfs_file_alloca(pid, "cmdline"); |
680 | f = fopen(p, "re"); | |
1e5678d0 LP |
681 | if (!f) |
682 | return -errno; | |
683 | ||
684 | count = fread(&c, 1, 1, f); | |
685 | eof = feof(f); | |
686 | fclose(f); | |
687 | ||
688 | /* Kernel threads have an empty cmdline */ | |
689 | ||
690 | if (count <= 0) | |
691 | return eof ? 1 : -errno; | |
692 | ||
693 | return 0; | |
694 | } | |
695 | ||
3a832116 SL |
696 | int get_process_capeff(pid_t pid, char **capeff) { |
697 | const char *p; | |
3a832116 SL |
698 | |
699 | assert(capeff); | |
700 | assert(pid >= 0); | |
701 | ||
702 | if (pid == 0) | |
703 | p = "/proc/self/status"; | |
704 | else | |
705 | p = procfs_file_alloca(pid, "status"); | |
706 | ||
69ab8088 | 707 | return get_status_field(p, "\nCapEff:", capeff); |
3a832116 | 708 | } |
49aa47c7 | 709 | |
87d2c1ff | 710 | int get_process_exe(pid_t pid, char **name) { |
49aa47c7 | 711 | const char *p; |
e79f68d1 ZJS |
712 | char *d; |
713 | int r; | |
87d2c1ff | 714 | |
49aa47c7 | 715 | assert(pid >= 0); |
87d2c1ff LP |
716 | assert(name); |
717 | ||
718 | if (pid == 0) | |
49aa47c7 LP |
719 | p = "/proc/self/exe"; |
720 | else | |
721 | p = procfs_file_alloca(pid, "exe"); | |
87d2c1ff | 722 | |
e79f68d1 ZJS |
723 | r = readlink_malloc(p, name); |
724 | if (r < 0) | |
725 | return r; | |
726 | ||
727 | d = endswith(*name, " (deleted)"); | |
728 | if (d) | |
729 | *d = '\0'; | |
730 | ||
731 | return 0; | |
87d2c1ff LP |
732 | } |
733 | ||
901c3d0d | 734 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
f74e605f | 735 | _cleanup_fclose_ FILE *f = NULL; |
9db11a99 | 736 | char line[LINE_MAX]; |
49aa47c7 | 737 | const char *p; |
7e4ab3c5 | 738 | |
f74e605f | 739 | assert(field); |
7e4ab3c5 LP |
740 | assert(uid); |
741 | ||
742 | if (pid == 0) | |
743 | return getuid(); | |
744 | ||
49aa47c7 LP |
745 | p = procfs_file_alloca(pid, "status"); |
746 | f = fopen(p, "re"); | |
7e4ab3c5 LP |
747 | if (!f) |
748 | return -errno; | |
749 | ||
9db11a99 | 750 | FOREACH_LINE(line, f, return -errno) { |
f74e605f | 751 | char *l; |
7e4ab3c5 LP |
752 | |
753 | l = strstrip(line); | |
754 | ||
901c3d0d LP |
755 | if (startswith(l, field)) { |
756 | l += strlen(field); | |
7e4ab3c5 LP |
757 | l += strspn(l, WHITESPACE); |
758 | ||
759 | l[strcspn(l, WHITESPACE)] = 0; | |
760 | ||
f74e605f | 761 | return parse_uid(l, uid); |
7e4ab3c5 LP |
762 | } |
763 | } | |
764 | ||
f74e605f | 765 | return -EIO; |
7e4ab3c5 LP |
766 | } |
767 | ||
901c3d0d LP |
768 | int get_process_uid(pid_t pid, uid_t *uid) { |
769 | return get_process_id(pid, "Uid:", uid); | |
770 | } | |
771 | ||
772 | int get_process_gid(pid_t pid, gid_t *gid) { | |
49aa47c7 | 773 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); |
901c3d0d LP |
774 | return get_process_id(pid, "Gid:", gid); |
775 | } | |
776 | ||
fab56fc5 LP |
777 | char *strnappend(const char *s, const char *suffix, size_t b) { |
778 | size_t a; | |
44d8db9e LP |
779 | char *r; |
780 | ||
fab56fc5 LP |
781 | if (!s && !suffix) |
782 | return strdup(""); | |
783 | ||
784 | if (!s) | |
785 | return strndup(suffix, b); | |
786 | ||
787 | if (!suffix) | |
788 | return strdup(s); | |
789 | ||
44d8db9e LP |
790 | assert(s); |
791 | assert(suffix); | |
792 | ||
793 | a = strlen(s); | |
aa408e77 | 794 | if (b > ((size_t) -1) - a) |
040f18ea | 795 | return NULL; |
44d8db9e | 796 | |
040f18ea LP |
797 | r = new(char, a+b+1); |
798 | if (!r) | |
44d8db9e LP |
799 | return NULL; |
800 | ||
801 | memcpy(r, s, a); | |
802 | memcpy(r+a, suffix, b); | |
803 | r[a+b] = 0; | |
804 | ||
805 | return r; | |
806 | } | |
87f0e418 | 807 | |
fab56fc5 LP |
808 | char *strappend(const char *s, const char *suffix) { |
809 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
810 | } | |
811 | ||
87f0e418 LP |
812 | int readlink_malloc(const char *p, char **r) { |
813 | size_t l = 100; | |
814 | ||
815 | assert(p); | |
816 | assert(r); | |
817 | ||
818 | for (;;) { | |
819 | char *c; | |
820 | ssize_t n; | |
821 | ||
822 | if (!(c = new(char, l))) | |
823 | return -ENOMEM; | |
824 | ||
825 | if ((n = readlink(p, c, l-1)) < 0) { | |
826 | int ret = -errno; | |
827 | free(c); | |
828 | return ret; | |
829 | } | |
830 | ||
831 | if ((size_t) n < l-1) { | |
832 | c[n] = 0; | |
833 | *r = c; | |
834 | return 0; | |
835 | } | |
836 | ||
837 | free(c); | |
838 | l *= 2; | |
839 | } | |
840 | } | |
841 | ||
2c7108c4 | 842 | int readlink_and_make_absolute(const char *p, char **r) { |
1058cbf2 ZJS |
843 | _cleanup_free_ char *target = NULL; |
844 | char *k; | |
2c7108c4 LP |
845 | int j; |
846 | ||
847 | assert(p); | |
848 | assert(r); | |
849 | ||
1058cbf2 ZJS |
850 | j = readlink_malloc(p, &target); |
851 | if (j < 0) | |
2c7108c4 LP |
852 | return j; |
853 | ||
854 | k = file_in_same_dir(p, target); | |
2c7108c4 LP |
855 | if (!k) |
856 | return -ENOMEM; | |
857 | ||
858 | *r = k; | |
859 | return 0; | |
860 | } | |
861 | ||
83096483 LP |
862 | int readlink_and_canonicalize(const char *p, char **r) { |
863 | char *t, *s; | |
864 | int j; | |
865 | ||
866 | assert(p); | |
867 | assert(r); | |
868 | ||
869 | j = readlink_and_make_absolute(p, &t); | |
870 | if (j < 0) | |
871 | return j; | |
872 | ||
873 | s = canonicalize_file_name(t); | |
874 | if (s) { | |
875 | free(t); | |
876 | *r = s; | |
877 | } else | |
878 | *r = t; | |
879 | ||
880 | path_kill_slashes(*r); | |
881 | ||
882 | return 0; | |
883 | } | |
884 | ||
2a987ee8 LP |
885 | int reset_all_signal_handlers(void) { |
886 | int sig; | |
887 | ||
888 | for (sig = 1; sig < _NSIG; sig++) { | |
b92bea5d ZJS |
889 | struct sigaction sa = { |
890 | .sa_handler = SIG_DFL, | |
891 | .sa_flags = SA_RESTART, | |
892 | }; | |
2a987ee8 LP |
893 | |
894 | if (sig == SIGKILL || sig == SIGSTOP) | |
895 | continue; | |
896 | ||
2a987ee8 LP |
897 | /* On Linux the first two RT signals are reserved by |
898 | * glibc, and sigaction() will return EINVAL for them. */ | |
899 | if ((sigaction(sig, &sa, NULL) < 0)) | |
900 | if (errno != EINVAL) | |
901 | return -errno; | |
902 | } | |
903 | ||
8e274523 | 904 | return 0; |
2a987ee8 | 905 | } |
4a72ff34 LP |
906 | |
907 | char *strstrip(char *s) { | |
57a8eca8 | 908 | char *e; |
4a72ff34 LP |
909 | |
910 | /* Drops trailing whitespace. Modifies the string in | |
911 | * place. Returns pointer to first non-space character */ | |
912 | ||
913 | s += strspn(s, WHITESPACE); | |
914 | ||
57a8eca8 LP |
915 | for (e = strchr(s, 0); e > s; e --) |
916 | if (!strchr(WHITESPACE, e[-1])) | |
917 | break; | |
4a72ff34 | 918 | |
57a8eca8 | 919 | *e = 0; |
4a72ff34 LP |
920 | |
921 | return s; | |
4a72ff34 LP |
922 | } |
923 | ||
ee9b5e01 LP |
924 | char *delete_chars(char *s, const char *bad) { |
925 | char *f, *t; | |
926 | ||
927 | /* Drops all whitespace, regardless where in the string */ | |
928 | ||
929 | for (f = s, t = s; *f; f++) { | |
930 | if (strchr(bad, *f)) | |
931 | continue; | |
932 | ||
933 | *(t++) = *f; | |
934 | } | |
935 | ||
936 | *t = 0; | |
937 | ||
938 | return s; | |
939 | } | |
940 | ||
ab1f0633 LP |
941 | bool in_charset(const char *s, const char* charset) { |
942 | const char *i; | |
943 | ||
944 | assert(s); | |
945 | assert(charset); | |
946 | ||
947 | for (i = s; *i; i++) | |
948 | if (!strchr(charset, *i)) | |
949 | return false; | |
950 | ||
951 | return true; | |
952 | } | |
953 | ||
4a72ff34 LP |
954 | char *file_in_same_dir(const char *path, const char *filename) { |
955 | char *e, *r; | |
956 | size_t k; | |
957 | ||
958 | assert(path); | |
959 | assert(filename); | |
960 | ||
961 | /* This removes the last component of path and appends | |
962 | * filename, unless the latter is absolute anyway or the | |
963 | * former isn't */ | |
964 | ||
965 | if (path_is_absolute(filename)) | |
966 | return strdup(filename); | |
967 | ||
968 | if (!(e = strrchr(path, '/'))) | |
969 | return strdup(filename); | |
970 | ||
971 | k = strlen(filename); | |
972 | if (!(r = new(char, e-path+1+k+1))) | |
973 | return NULL; | |
974 | ||
975 | memcpy(r, path, e-path+1); | |
976 | memcpy(r+(e-path)+1, filename, k+1); | |
977 | ||
978 | return r; | |
979 | } | |
fb624d04 | 980 | |
c32dd69b LP |
981 | int rmdir_parents(const char *path, const char *stop) { |
982 | size_t l; | |
983 | int r = 0; | |
984 | ||
985 | assert(path); | |
986 | assert(stop); | |
987 | ||
988 | l = strlen(path); | |
989 | ||
990 | /* Skip trailing slashes */ | |
991 | while (l > 0 && path[l-1] == '/') | |
992 | l--; | |
993 | ||
994 | while (l > 0) { | |
995 | char *t; | |
996 | ||
997 | /* Skip last component */ | |
998 | while (l > 0 && path[l-1] != '/') | |
999 | l--; | |
1000 | ||
1001 | /* Skip trailing slashes */ | |
1002 | while (l > 0 && path[l-1] == '/') | |
1003 | l--; | |
1004 | ||
1005 | if (l <= 0) | |
1006 | break; | |
1007 | ||
1008 | if (!(t = strndup(path, l))) | |
1009 | return -ENOMEM; | |
1010 | ||
1011 | if (path_startswith(stop, t)) { | |
1012 | free(t); | |
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | r = rmdir(t); | |
1017 | free(t); | |
1018 | ||
1019 | if (r < 0) | |
1020 | if (errno != ENOENT) | |
1021 | return -errno; | |
1022 | } | |
1023 | ||
1024 | return 0; | |
1025 | } | |
1026 | ||
fb624d04 LP |
1027 | char hexchar(int x) { |
1028 | static const char table[16] = "0123456789abcdef"; | |
1029 | ||
1030 | return table[x & 15]; | |
1031 | } | |
4fe88d28 LP |
1032 | |
1033 | int unhexchar(char c) { | |
1034 | ||
1035 | if (c >= '0' && c <= '9') | |
1036 | return c - '0'; | |
1037 | ||
1038 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1039 | return c - 'a' + 10; |
4fe88d28 LP |
1040 | |
1041 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1042 | return c - 'A' + 10; |
4fe88d28 LP |
1043 | |
1044 | return -1; | |
1045 | } | |
1046 | ||
66e35261 LP |
1047 | char *hexmem(const void *p, size_t l) { |
1048 | char *r, *z; | |
1049 | const uint8_t *x; | |
1050 | ||
1051 | z = r = malloc(l * 2 + 1); | |
1052 | if (!r) | |
1053 | return NULL; | |
1054 | ||
1055 | for (x = p; x < (const uint8_t*) p + l; x++) { | |
1056 | *(z++) = hexchar(*x >> 4); | |
1057 | *(z++) = hexchar(*x & 15); | |
1058 | } | |
1059 | ||
1060 | *z = 0; | |
1061 | return r; | |
1062 | } | |
1063 | ||
2181a7f5 LP |
1064 | void *unhexmem(const char *p, size_t l) { |
1065 | uint8_t *r, *z; | |
1066 | const char *x; | |
1067 | ||
1068 | assert(p); | |
1069 | ||
1070 | z = r = malloc((l + 1) / 2 + 1); | |
1071 | if (!r) | |
1072 | return NULL; | |
1073 | ||
1074 | for (x = p; x < p + l; x += 2) { | |
1075 | int a, b; | |
1076 | ||
1077 | a = unhexchar(x[0]); | |
1078 | if (x+1 < p + l) | |
1079 | b = unhexchar(x[1]); | |
1080 | else | |
1081 | b = 0; | |
1082 | ||
1083 | *(z++) = (uint8_t) a << 4 | (uint8_t) b; | |
1084 | } | |
1085 | ||
1086 | *z = 0; | |
1087 | return r; | |
1088 | } | |
1089 | ||
4fe88d28 LP |
1090 | char octchar(int x) { |
1091 | return '0' + (x & 7); | |
1092 | } | |
1093 | ||
1094 | int unoctchar(char c) { | |
1095 | ||
1096 | if (c >= '0' && c <= '7') | |
1097 | return c - '0'; | |
1098 | ||
1099 | return -1; | |
1100 | } | |
1101 | ||
5af98f82 LP |
1102 | char decchar(int x) { |
1103 | return '0' + (x % 10); | |
1104 | } | |
1105 | ||
1106 | int undecchar(char c) { | |
1107 | ||
1108 | if (c >= '0' && c <= '9') | |
1109 | return c - '0'; | |
1110 | ||
1111 | return -1; | |
1112 | } | |
1113 | ||
4fe88d28 LP |
1114 | char *cescape(const char *s) { |
1115 | char *r, *t; | |
1116 | const char *f; | |
1117 | ||
1118 | assert(s); | |
1119 | ||
1120 | /* Does C style string escaping. */ | |
1121 | ||
f8e2fb7b LP |
1122 | r = new(char, strlen(s)*4 + 1); |
1123 | if (!r) | |
4fe88d28 LP |
1124 | return NULL; |
1125 | ||
1126 | for (f = s, t = r; *f; f++) | |
1127 | ||
1128 | switch (*f) { | |
1129 | ||
1130 | case '\a': | |
1131 | *(t++) = '\\'; | |
1132 | *(t++) = 'a'; | |
1133 | break; | |
1134 | case '\b': | |
1135 | *(t++) = '\\'; | |
1136 | *(t++) = 'b'; | |
1137 | break; | |
1138 | case '\f': | |
1139 | *(t++) = '\\'; | |
1140 | *(t++) = 'f'; | |
1141 | break; | |
1142 | case '\n': | |
1143 | *(t++) = '\\'; | |
1144 | *(t++) = 'n'; | |
1145 | break; | |
1146 | case '\r': | |
1147 | *(t++) = '\\'; | |
1148 | *(t++) = 'r'; | |
1149 | break; | |
1150 | case '\t': | |
1151 | *(t++) = '\\'; | |
1152 | *(t++) = 't'; | |
1153 | break; | |
1154 | case '\v': | |
1155 | *(t++) = '\\'; | |
1156 | *(t++) = 'v'; | |
1157 | break; | |
1158 | case '\\': | |
1159 | *(t++) = '\\'; | |
1160 | *(t++) = '\\'; | |
1161 | break; | |
1162 | case '"': | |
1163 | *(t++) = '\\'; | |
1164 | *(t++) = '"'; | |
1165 | break; | |
1166 | case '\'': | |
1167 | *(t++) = '\\'; | |
1168 | *(t++) = '\''; | |
1169 | break; | |
1170 | ||
1171 | default: | |
1172 | /* For special chars we prefer octal over | |
1173 | * hexadecimal encoding, simply because glib's | |
1174 | * g_strescape() does the same */ | |
1175 | if ((*f < ' ') || (*f >= 127)) { | |
1176 | *(t++) = '\\'; | |
1177 | *(t++) = octchar((unsigned char) *f >> 6); | |
1178 | *(t++) = octchar((unsigned char) *f >> 3); | |
1179 | *(t++) = octchar((unsigned char) *f); | |
1180 | } else | |
1181 | *(t++) = *f; | |
1182 | break; | |
1183 | } | |
1184 | ||
1185 | *t = 0; | |
1186 | ||
1187 | return r; | |
1188 | } | |
1189 | ||
5b4c61cd | 1190 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1191 | char *r, *t; |
1192 | const char *f; | |
5b4c61cd | 1193 | size_t pl; |
4fe88d28 LP |
1194 | |
1195 | assert(s); | |
1196 | ||
5b4c61cd LP |
1197 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1198 | ||
1199 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1200 | |
5b4c61cd | 1201 | r = new(char, pl+length+1); |
7f110ff9 | 1202 | if (!r) |
4fe88d28 LP |
1203 | return r; |
1204 | ||
5b4c61cd LP |
1205 | if (prefix) |
1206 | memcpy(r, prefix, pl); | |
1207 | ||
1208 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1209 | |
1210 | if (*f != '\\') { | |
1211 | *(t++) = *f; | |
1212 | continue; | |
1213 | } | |
1214 | ||
1215 | f++; | |
1216 | ||
1217 | switch (*f) { | |
1218 | ||
1219 | case 'a': | |
1220 | *(t++) = '\a'; | |
1221 | break; | |
1222 | case 'b': | |
1223 | *(t++) = '\b'; | |
1224 | break; | |
1225 | case 'f': | |
1226 | *(t++) = '\f'; | |
1227 | break; | |
1228 | case 'n': | |
1229 | *(t++) = '\n'; | |
1230 | break; | |
1231 | case 'r': | |
1232 | *(t++) = '\r'; | |
1233 | break; | |
1234 | case 't': | |
1235 | *(t++) = '\t'; | |
1236 | break; | |
1237 | case 'v': | |
1238 | *(t++) = '\v'; | |
1239 | break; | |
1240 | case '\\': | |
1241 | *(t++) = '\\'; | |
1242 | break; | |
1243 | case '"': | |
1244 | *(t++) = '"'; | |
1245 | break; | |
1246 | case '\'': | |
1247 | *(t++) = '\''; | |
1248 | break; | |
1249 | ||
e167fb86 LP |
1250 | case 's': |
1251 | /* This is an extension of the XDG syntax files */ | |
1252 | *(t++) = ' '; | |
1253 | break; | |
1254 | ||
4fe88d28 LP |
1255 | case 'x': { |
1256 | /* hexadecimal encoding */ | |
1257 | int a, b; | |
1258 | ||
7f110ff9 LP |
1259 | a = unhexchar(f[1]); |
1260 | b = unhexchar(f[2]); | |
1261 | ||
1262 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1263 | /* Invalid escape code, let's take it literal then */ |
1264 | *(t++) = '\\'; | |
1265 | *(t++) = 'x'; | |
1266 | } else { | |
1267 | *(t++) = (char) ((a << 4) | b); | |
1268 | f += 2; | |
1269 | } | |
1270 | ||
1271 | break; | |
1272 | } | |
1273 | ||
1274 | case '0': | |
1275 | case '1': | |
1276 | case '2': | |
1277 | case '3': | |
1278 | case '4': | |
1279 | case '5': | |
1280 | case '6': | |
1281 | case '7': { | |
1282 | /* octal encoding */ | |
1283 | int a, b, c; | |
1284 | ||
7f110ff9 LP |
1285 | a = unoctchar(f[0]); |
1286 | b = unoctchar(f[1]); | |
1287 | c = unoctchar(f[2]); | |
1288 | ||
1289 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1290 | /* Invalid escape code, let's take it literal then */ |
1291 | *(t++) = '\\'; | |
1292 | *(t++) = f[0]; | |
1293 | } else { | |
1294 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1295 | f += 2; | |
1296 | } | |
1297 | ||
1298 | break; | |
1299 | } | |
1300 | ||
1301 | case 0: | |
1302 | /* premature end of string.*/ | |
1303 | *(t++) = '\\'; | |
1304 | goto finish; | |
1305 | ||
1306 | default: | |
1307 | /* Invalid escape code, let's take it literal then */ | |
1308 | *(t++) = '\\'; | |
f3d4cc01 | 1309 | *(t++) = *f; |
4fe88d28 LP |
1310 | break; |
1311 | } | |
1312 | } | |
1313 | ||
1314 | finish: | |
1315 | *t = 0; | |
1316 | return r; | |
1317 | } | |
1318 | ||
5b4c61cd LP |
1319 | char *cunescape_length(const char *s, size_t length) { |
1320 | return cunescape_length_with_prefix(s, length, NULL); | |
1321 | } | |
1322 | ||
6febfd0d | 1323 | char *cunescape(const char *s) { |
5b4c61cd LP |
1324 | assert(s); |
1325 | ||
6febfd0d LP |
1326 | return cunescape_length(s, strlen(s)); |
1327 | } | |
4fe88d28 LP |
1328 | |
1329 | char *xescape(const char *s, const char *bad) { | |
1330 | char *r, *t; | |
1331 | const char *f; | |
1332 | ||
1333 | /* Escapes all chars in bad, in addition to \ and all special | |
1334 | * chars, in \xFF style escaping. May be reversed with | |
1335 | * cunescape. */ | |
1336 | ||
08ace05b LP |
1337 | r = new(char, strlen(s) * 4 + 1); |
1338 | if (!r) | |
4fe88d28 LP |
1339 | return NULL; |
1340 | ||
1341 | for (f = s, t = r; *f; f++) { | |
1342 | ||
b866264a LP |
1343 | if ((*f < ' ') || (*f >= 127) || |
1344 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1345 | *(t++) = '\\'; |
1346 | *(t++) = 'x'; | |
1347 | *(t++) = hexchar(*f >> 4); | |
1348 | *(t++) = hexchar(*f); | |
1349 | } else | |
1350 | *(t++) = *f; | |
1351 | } | |
1352 | ||
1353 | *t = 0; | |
1354 | ||
1355 | return r; | |
1356 | } | |
1357 | ||
ea430986 | 1358 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1359 | char *r, *t; |
1360 | const char *f; | |
1361 | ||
47be870b LP |
1362 | assert(s); |
1363 | ||
ea430986 | 1364 | /* Escapes all chars that D-Bus' object path cannot deal |
d47c78be LP |
1365 | * with. Can be reverse with bus_path_unescape(). We special |
1366 | * case the empty string. */ | |
ea430986 | 1367 | |
d47c78be LP |
1368 | if (*s == 0) |
1369 | return strdup("_"); | |
1370 | ||
1371 | r = new(char, strlen(s)*3 + 1); | |
1372 | if (!r) | |
ea430986 LP |
1373 | return NULL; |
1374 | ||
1375 | for (f = s, t = r; *f; f++) { | |
1376 | ||
d47c78be LP |
1377 | /* Escape everything that is not a-zA-Z0-9. We also |
1378 | * escape 0-9 if it's the first character */ | |
1379 | ||
ea430986 LP |
1380 | if (!(*f >= 'A' && *f <= 'Z') && |
1381 | !(*f >= 'a' && *f <= 'z') && | |
d47c78be | 1382 | !(f > s && *f >= '0' && *f <= '9')) { |
ea430986 LP |
1383 | *(t++) = '_'; |
1384 | *(t++) = hexchar(*f >> 4); | |
1385 | *(t++) = hexchar(*f); | |
1386 | } else | |
1387 | *(t++) = *f; | |
1388 | } | |
1389 | ||
1390 | *t = 0; | |
1391 | ||
1392 | return r; | |
1393 | } | |
1394 | ||
9e2f7c11 | 1395 | char *bus_path_unescape(const char *f) { |
ea430986 | 1396 | char *r, *t; |
ea430986 | 1397 | |
9e2f7c11 | 1398 | assert(f); |
47be870b | 1399 | |
d47c78be LP |
1400 | /* Special case for the empty string */ |
1401 | if (streq(f, "_")) | |
1402 | return strdup(""); | |
1403 | ||
1404 | r = new(char, strlen(f) + 1); | |
1405 | if (!r) | |
ea430986 LP |
1406 | return NULL; |
1407 | ||
9e2f7c11 | 1408 | for (t = r; *f; f++) { |
ea430986 LP |
1409 | |
1410 | if (*f == '_') { | |
1411 | int a, b; | |
1412 | ||
1413 | if ((a = unhexchar(f[1])) < 0 || | |
1414 | (b = unhexchar(f[2])) < 0) { | |
1415 | /* Invalid escape code, let's take it literal then */ | |
1416 | *(t++) = '_'; | |
1417 | } else { | |
1418 | *(t++) = (char) ((a << 4) | b); | |
1419 | f += 2; | |
1420 | } | |
1421 | } else | |
1422 | *(t++) = *f; | |
1423 | } | |
1424 | ||
1425 | *t = 0; | |
1426 | ||
1427 | return r; | |
1428 | } | |
1429 | ||
67d51650 | 1430 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1431 | char *p; |
1432 | ||
67d51650 | 1433 | assert(t); |
4fe88d28 | 1434 | |
67d51650 | 1435 | for (p = t; *p; p++) |
4fe88d28 LP |
1436 | if (*p >= 'A' && *p <= 'Z') |
1437 | *p = *p - 'A' + 'a'; | |
1438 | ||
67d51650 | 1439 | return t; |
4fe88d28 | 1440 | } |
1dccbe19 | 1441 | |
44a6b1b6 | 1442 | _pure_ static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1443 | assert(filename); |
1444 | ||
1445 | return | |
1446 | filename[0] == '.' || | |
6c78be3c | 1447 | streq(filename, "lost+found") || |
e472d476 LP |
1448 | streq(filename, "aquota.user") || |
1449 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1450 | endswith(filename, ".rpmnew") || |
1451 | endswith(filename, ".rpmsave") || | |
1452 | endswith(filename, ".rpmorig") || | |
1453 | endswith(filename, ".dpkg-old") || | |
1454 | endswith(filename, ".dpkg-new") || | |
1455 | endswith(filename, ".swp"); | |
1456 | } | |
1457 | ||
a228a22f LP |
1458 | bool ignore_file(const char *filename) { |
1459 | assert(filename); | |
1460 | ||
1461 | if (endswith(filename, "~")) | |
1462 | return false; | |
1463 | ||
1464 | return ignore_file_allow_backup(filename); | |
1465 | } | |
1466 | ||
3a0ecb08 LP |
1467 | int fd_nonblock(int fd, bool nonblock) { |
1468 | int flags; | |
1469 | ||
1470 | assert(fd >= 0); | |
1471 | ||
1472 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1473 | return -errno; | |
1474 | ||
1475 | if (nonblock) | |
1476 | flags |= O_NONBLOCK; | |
1477 | else | |
1478 | flags &= ~O_NONBLOCK; | |
1479 | ||
1480 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1481 | return -errno; | |
1482 | ||
1483 | return 0; | |
1484 | } | |
1485 | ||
1486 | int fd_cloexec(int fd, bool cloexec) { | |
1487 | int flags; | |
1488 | ||
1489 | assert(fd >= 0); | |
1490 | ||
1491 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1492 | return -errno; | |
1493 | ||
1494 | if (cloexec) | |
1495 | flags |= FD_CLOEXEC; | |
1496 | else | |
1497 | flags &= ~FD_CLOEXEC; | |
1498 | ||
1499 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1500 | return -errno; | |
1501 | ||
1502 | return 0; | |
1503 | } | |
1504 | ||
44a6b1b6 | 1505 | _pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
b19be9eb LP |
1506 | unsigned i; |
1507 | ||
1508 | assert(n_fdset == 0 || fdset); | |
1509 | ||
1510 | for (i = 0; i < n_fdset; i++) | |
1511 | if (fdset[i] == fd) | |
1512 | return true; | |
1513 | ||
1514 | return false; | |
1515 | } | |
1516 | ||
a0d40ac5 LP |
1517 | int close_all_fds(const int except[], unsigned n_except) { |
1518 | DIR *d; | |
1519 | struct dirent *de; | |
1520 | int r = 0; | |
1521 | ||
b19be9eb LP |
1522 | assert(n_except == 0 || except); |
1523 | ||
1524 | d = opendir("/proc/self/fd"); | |
1525 | if (!d) { | |
1526 | int fd; | |
1527 | struct rlimit rl; | |
1528 | ||
1529 | /* When /proc isn't available (for example in chroots) | |
1530 | * the fallback is brute forcing through the fd | |
1531 | * table */ | |
1532 | ||
1533 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1534 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1535 | ||
1536 | if (fd_in_set(fd, except, n_except)) | |
1537 | continue; | |
1538 | ||
1539 | if (close_nointr(fd) < 0) | |
1540 | if (errno != EBADF && r == 0) | |
1541 | r = -errno; | |
1542 | } | |
1543 | ||
1544 | return r; | |
1545 | } | |
a0d40ac5 LP |
1546 | |
1547 | while ((de = readdir(d))) { | |
a7610064 | 1548 | int fd = -1; |
a0d40ac5 | 1549 | |
a16e1123 | 1550 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1551 | continue; |
1552 | ||
720ce21d LP |
1553 | if (safe_atoi(de->d_name, &fd) < 0) |
1554 | /* Let's better ignore this, just in case */ | |
1555 | continue; | |
a0d40ac5 LP |
1556 | |
1557 | if (fd < 3) | |
1558 | continue; | |
1559 | ||
1560 | if (fd == dirfd(d)) | |
1561 | continue; | |
1562 | ||
b19be9eb LP |
1563 | if (fd_in_set(fd, except, n_except)) |
1564 | continue; | |
a0d40ac5 | 1565 | |
720ce21d | 1566 | if (close_nointr(fd) < 0) { |
2f357920 | 1567 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1568 | if (errno != EBADF && r == 0) |
1569 | r = -errno; | |
2f357920 | 1570 | } |
a0d40ac5 LP |
1571 | } |
1572 | ||
a0d40ac5 LP |
1573 | closedir(d); |
1574 | return r; | |
1575 | } | |
1576 | ||
db12775d LP |
1577 | bool chars_intersect(const char *a, const char *b) { |
1578 | const char *p; | |
1579 | ||
1580 | /* Returns true if any of the chars in a are in b. */ | |
1581 | for (p = a; *p; p++) | |
1582 | if (strchr(b, *p)) | |
1583 | return true; | |
1584 | ||
1585 | return false; | |
1586 | } | |
1587 | ||
42856c10 | 1588 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
1589 | static const char table[] = |
1590 | "cifs\0" | |
1591 | "smbfs\0" | |
1592 | "ncpfs\0" | |
dac70dc7 | 1593 | "ncp\0" |
a05f97b3 LP |
1594 | "nfs\0" |
1595 | "nfs4\0" | |
1596 | "gfs\0" | |
73836c5c | 1597 | "gfs2\0"; |
42856c10 | 1598 | |
a05f97b3 | 1599 | return nulstr_contains(table, fstype); |
42856c10 LP |
1600 | } |
1601 | ||
601f6a1e | 1602 | int chvt(int vt) { |
a05f97b3 | 1603 | _cleanup_close_ int fd; |
601f6a1e | 1604 | |
a05f97b3 LP |
1605 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1606 | if (fd < 0) | |
601f6a1e LP |
1607 | return -errno; |
1608 | ||
1609 | if (vt < 0) { | |
1610 | int tiocl[2] = { | |
1611 | TIOCL_GETKMSGREDIRECT, | |
1612 | 0 | |
1613 | }; | |
1614 | ||
a05f97b3 LP |
1615 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1616 | return -errno; | |
601f6a1e LP |
1617 | |
1618 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1619 | } | |
1620 | ||
1621 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1622 | return -errno; |
601f6a1e | 1623 | |
a05f97b3 | 1624 | return 0; |
601f6a1e LP |
1625 | } |
1626 | ||
8f2d43a0 | 1627 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
1628 | struct termios old_termios, new_termios; |
1629 | char c; | |
20c03b7b | 1630 | char line[LINE_MAX]; |
80876c20 LP |
1631 | |
1632 | assert(f); | |
1633 | assert(ret); | |
1634 | ||
1635 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1636 | new_termios = old_termios; | |
1637 | ||
1638 | new_termios.c_lflag &= ~ICANON; | |
1639 | new_termios.c_cc[VMIN] = 1; | |
1640 | new_termios.c_cc[VTIME] = 0; | |
1641 | ||
1642 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1643 | size_t k; | |
1644 | ||
8f2d43a0 LP |
1645 | if (t != (usec_t) -1) { |
1646 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
1647 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1648 | return -ETIMEDOUT; | |
1649 | } | |
1650 | } | |
1651 | ||
80876c20 LP |
1652 | k = fread(&c, 1, 1, f); |
1653 | ||
1654 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1655 | ||
1656 | if (k <= 0) | |
1657 | return -EIO; | |
1658 | ||
1659 | if (need_nl) | |
1660 | *need_nl = c != '\n'; | |
1661 | ||
1662 | *ret = c; | |
1663 | return 0; | |
1664 | } | |
1665 | } | |
1666 | ||
8f2d43a0 LP |
1667 | if (t != (usec_t) -1) |
1668 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
1669 | return -ETIMEDOUT; | |
1670 | ||
1671 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
1672 | return -EIO; |
1673 | ||
1674 | truncate_nl(line); | |
1675 | ||
1676 | if (strlen(line) != 1) | |
1677 | return -EBADMSG; | |
1678 | ||
1679 | if (need_nl) | |
1680 | *need_nl = false; | |
1681 | ||
1682 | *ret = line[0]; | |
1683 | return 0; | |
1684 | } | |
1685 | ||
1686 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 | 1687 | |
80876c20 LP |
1688 | assert(ret); |
1689 | assert(replies); | |
1690 | assert(text); | |
1691 | ||
1692 | for (;;) { | |
1693 | va_list ap; | |
1694 | char c; | |
1695 | int r; | |
1696 | bool need_nl = true; | |
1697 | ||
8481248b | 1698 | if (on_tty()) |
c1072ea0 | 1699 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1700 | |
80876c20 LP |
1701 | va_start(ap, text); |
1702 | vprintf(text, ap); | |
1703 | va_end(ap); | |
1704 | ||
8481248b | 1705 | if (on_tty()) |
c1072ea0 | 1706 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1707 | |
80876c20 LP |
1708 | fflush(stdout); |
1709 | ||
8f2d43a0 LP |
1710 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
1711 | if (r < 0) { | |
80876c20 LP |
1712 | |
1713 | if (r == -EBADMSG) { | |
1714 | puts("Bad input, please try again."); | |
1715 | continue; | |
1716 | } | |
1717 | ||
1718 | putchar('\n'); | |
1719 | return r; | |
1720 | } | |
1721 | ||
1722 | if (need_nl) | |
1723 | putchar('\n'); | |
1724 | ||
1725 | if (strchr(replies, c)) { | |
1726 | *ret = c; | |
1727 | return 0; | |
1728 | } | |
1729 | ||
1730 | puts("Read unexpected character, please try again."); | |
1731 | } | |
1732 | } | |
1733 | ||
512947d4 | 1734 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
1735 | struct termios termios; |
1736 | int r = 0; | |
3fe5e5d4 LP |
1737 | |
1738 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
1739 | |
1740 | assert(fd >= 0); | |
1741 | ||
eed1d0e3 LP |
1742 | /* We leave locked terminal attributes untouched, so that |
1743 | * Plymouth may set whatever it wants to set, and we don't | |
1744 | * interfere with that. */ | |
3fe5e5d4 LP |
1745 | |
1746 | /* Disable exclusive mode, just in case */ | |
1747 | ioctl(fd, TIOCNXCL); | |
1748 | ||
5c0100a5 | 1749 | /* Switch to text mode */ |
512947d4 MS |
1750 | if (switch_to_text) |
1751 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 1752 | |
3fe5e5d4 | 1753 | /* Enable console unicode mode */ |
df465b3f | 1754 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
1755 | |
1756 | if (tcgetattr(fd, &termios) < 0) { | |
1757 | r = -errno; | |
1758 | goto finish; | |
1759 | } | |
1760 | ||
aaf694ca LP |
1761 | /* We only reset the stuff that matters to the software. How |
1762 | * hardware is set up we don't touch assuming that somebody | |
1763 | * else will do that for us */ | |
1764 | ||
1765 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
1766 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
1767 | termios.c_oflag |= ONLCR; | |
1768 | termios.c_cflag |= CREAD; | |
1769 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
1770 | ||
1771 | termios.c_cc[VINTR] = 03; /* ^C */ | |
1772 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
1773 | termios.c_cc[VERASE] = 0177; | |
1774 | termios.c_cc[VKILL] = 025; /* ^X */ | |
1775 | termios.c_cc[VEOF] = 04; /* ^D */ | |
1776 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
1777 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
1778 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
1779 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
1780 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
1781 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
1782 | termios.c_cc[VEOL] = 0; |
1783 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
1784 | |
1785 | termios.c_cc[VTIME] = 0; | |
1786 | termios.c_cc[VMIN] = 1; | |
1787 | ||
1788 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
1789 | r = -errno; | |
1790 | ||
1791 | finish: | |
1792 | /* Just in case, flush all crap out */ | |
1793 | tcflush(fd, TCIOFLUSH); | |
1794 | ||
1795 | return r; | |
1796 | } | |
1797 | ||
6ea832a2 LP |
1798 | int reset_terminal(const char *name) { |
1799 | int fd, r; | |
1800 | ||
1801 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
1802 | if (fd < 0) | |
1803 | return fd; | |
1804 | ||
512947d4 | 1805 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
1806 | close_nointr_nofail(fd); |
1807 | ||
1808 | return r; | |
1809 | } | |
1810 | ||
80876c20 LP |
1811 | int open_terminal(const char *name, int mode) { |
1812 | int fd, r; | |
f73f76ac | 1813 | unsigned c = 0; |
80876c20 | 1814 | |
f73f76ac LP |
1815 | /* |
1816 | * If a TTY is in the process of being closed opening it might | |
1817 | * cause EIO. This is horribly awful, but unlikely to be | |
1818 | * changed in the kernel. Hence we work around this problem by | |
1819 | * retrying a couple of times. | |
1820 | * | |
1821 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
1822 | */ | |
1823 | ||
dd94c17e LP |
1824 | assert(!(mode & O_CREAT)); |
1825 | ||
f73f76ac | 1826 | for (;;) { |
dd94c17e | 1827 | fd = open(name, mode, 0); |
af6da548 | 1828 | if (fd >= 0) |
f73f76ac LP |
1829 | break; |
1830 | ||
1831 | if (errno != EIO) | |
1832 | return -errno; | |
1833 | ||
af6da548 | 1834 | /* Max 1s in total */ |
f73f76ac LP |
1835 | if (c >= 20) |
1836 | return -errno; | |
1837 | ||
1838 | usleep(50 * USEC_PER_MSEC); | |
1839 | c++; | |
1840 | } | |
1841 | ||
1842 | if (fd < 0) | |
80876c20 LP |
1843 | return -errno; |
1844 | ||
af6da548 LP |
1845 | r = isatty(fd); |
1846 | if (r < 0) { | |
80876c20 LP |
1847 | close_nointr_nofail(fd); |
1848 | return -errno; | |
1849 | } | |
1850 | ||
1851 | if (!r) { | |
1852 | close_nointr_nofail(fd); | |
1853 | return -ENOTTY; | |
1854 | } | |
1855 | ||
1856 | return fd; | |
1857 | } | |
1858 | ||
1859 | int flush_fd(int fd) { | |
b92bea5d ZJS |
1860 | struct pollfd pollfd = { |
1861 | .fd = fd, | |
1862 | .events = POLLIN, | |
1863 | }; | |
80876c20 LP |
1864 | |
1865 | for (;;) { | |
20c03b7b | 1866 | char buf[LINE_MAX]; |
80876c20 LP |
1867 | ssize_t l; |
1868 | int r; | |
1869 | ||
e62d8c39 ZJS |
1870 | r = poll(&pollfd, 1, 0); |
1871 | if (r < 0) { | |
80876c20 LP |
1872 | if (errno == EINTR) |
1873 | continue; | |
1874 | ||
1875 | return -errno; | |
80876c20 | 1876 | |
e62d8c39 | 1877 | } else if (r == 0) |
80876c20 LP |
1878 | return 0; |
1879 | ||
e62d8c39 ZJS |
1880 | l = read(fd, buf, sizeof(buf)); |
1881 | if (l < 0) { | |
80876c20 LP |
1882 | |
1883 | if (errno == EINTR) | |
1884 | continue; | |
1885 | ||
1886 | if (errno == EAGAIN) | |
1887 | return 0; | |
1888 | ||
1889 | return -errno; | |
e62d8c39 | 1890 | } else if (l == 0) |
80876c20 LP |
1891 | return 0; |
1892 | } | |
1893 | } | |
1894 | ||
af6da548 LP |
1895 | int acquire_terminal( |
1896 | const char *name, | |
1897 | bool fail, | |
1898 | bool force, | |
1899 | bool ignore_tiocstty_eperm, | |
1900 | usec_t timeout) { | |
1901 | ||
4a0ff478 | 1902 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 1903 | usec_t ts = 0; |
80876c20 LP |
1904 | |
1905 | assert(name); | |
1906 | ||
1907 | /* We use inotify to be notified when the tty is closed. We | |
1908 | * create the watch before checking if we can actually acquire | |
1909 | * it, so that we don't lose any event. | |
1910 | * | |
1911 | * Note: strictly speaking this actually watches for the | |
1912 | * device being closed, it does *not* really watch whether a | |
1913 | * tty loses its controlling process. However, unless some | |
1914 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
1915 | * its tty otherwise this will not become a problem. As long | |
1916 | * as the administrator makes sure not configure any service | |
1917 | * on the same tty as an untrusted user this should not be a | |
1918 | * problem. (Which he probably should not do anyway.) */ | |
1919 | ||
af6da548 LP |
1920 | if (timeout != (usec_t) -1) |
1921 | ts = now(CLOCK_MONOTONIC); | |
1922 | ||
80876c20 | 1923 | if (!fail && !force) { |
af6da548 LP |
1924 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
1925 | if (notify < 0) { | |
80876c20 LP |
1926 | r = -errno; |
1927 | goto fail; | |
1928 | } | |
1929 | ||
af6da548 LP |
1930 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
1931 | if (wd < 0) { | |
80876c20 LP |
1932 | r = -errno; |
1933 | goto fail; | |
1934 | } | |
1935 | } | |
1936 | ||
1937 | for (;;) { | |
b92bea5d ZJS |
1938 | struct sigaction sa_old, sa_new = { |
1939 | .sa_handler = SIG_IGN, | |
1940 | .sa_flags = SA_RESTART, | |
1941 | }; | |
1942 | ||
af6da548 LP |
1943 | if (notify >= 0) { |
1944 | r = flush_fd(notify); | |
1945 | if (r < 0) | |
e3d1855b | 1946 | goto fail; |
af6da548 | 1947 | } |
80876c20 LP |
1948 | |
1949 | /* We pass here O_NOCTTY only so that we can check the return | |
1950 | * value TIOCSCTTY and have a reliable way to figure out if we | |
1951 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
1952 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
1953 | if (fd < 0) | |
6ea832a2 | 1954 | return fd; |
80876c20 | 1955 | |
32c4bef8 LP |
1956 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1957 | * if we already own the tty. */ | |
32c4bef8 LP |
1958 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
1959 | ||
80876c20 | 1960 | /* First, try to get the tty */ |
32c4bef8 LP |
1961 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
1962 | r = -errno; | |
1963 | ||
1964 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
1965 | |
1966 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
1967 | * returning EPERM, i.e. when very likely we already | |
1968 | * are have this controlling terminal. */ | |
32c4bef8 | 1969 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
1970 | r = 0; |
1971 | ||
32c4bef8 | 1972 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
1973 | goto fail; |
1974 | } | |
1975 | ||
1976 | if (r >= 0) | |
1977 | break; | |
1978 | ||
1979 | assert(!fail); | |
1980 | assert(!force); | |
1981 | assert(notify >= 0); | |
1982 | ||
1983 | for (;;) { | |
f601daa7 | 1984 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 1985 | ssize_t l; |
f601daa7 | 1986 | struct inotify_event *e; |
80876c20 | 1987 | |
af6da548 LP |
1988 | if (timeout != (usec_t) -1) { |
1989 | usec_t n; | |
1990 | ||
1991 | n = now(CLOCK_MONOTONIC); | |
1992 | if (ts + timeout < n) { | |
1993 | r = -ETIMEDOUT; | |
1994 | goto fail; | |
1995 | } | |
1996 | ||
1997 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
1998 | if (r < 0) | |
1999 | goto fail; | |
2000 | ||
2001 | if (r == 0) { | |
2002 | r = -ETIMEDOUT; | |
2003 | goto fail; | |
2004 | } | |
2005 | } | |
2006 | ||
2007 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
2008 | if (l < 0) { | |
80876c20 | 2009 | |
af6da548 | 2010 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
2011 | continue; |
2012 | ||
2013 | r = -errno; | |
2014 | goto fail; | |
2015 | } | |
2016 | ||
2017 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2018 | |
f601daa7 LP |
2019 | while (l > 0) { |
2020 | size_t step; | |
80876c20 | 2021 | |
f601daa7 | 2022 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2023 | r = -EIO; |
f601daa7 LP |
2024 | goto fail; |
2025 | } | |
80876c20 | 2026 | |
f601daa7 LP |
2027 | step = sizeof(struct inotify_event) + e->len; |
2028 | assert(step <= (size_t) l); | |
80876c20 | 2029 | |
f601daa7 LP |
2030 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2031 | l -= step; | |
80876c20 LP |
2032 | } |
2033 | ||
2034 | break; | |
2035 | } | |
2036 | ||
2037 | /* We close the tty fd here since if the old session | |
2038 | * ended our handle will be dead. It's important that | |
2039 | * we do this after sleeping, so that we don't enter | |
2040 | * an endless loop. */ | |
2041 | close_nointr_nofail(fd); | |
2042 | } | |
2043 | ||
2044 | if (notify >= 0) | |
a16e1123 | 2045 | close_nointr_nofail(notify); |
80876c20 | 2046 | |
512947d4 MS |
2047 | r = reset_terminal_fd(fd, true); |
2048 | if (r < 0) | |
80876c20 LP |
2049 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2050 | ||
2051 | return fd; | |
2052 | ||
2053 | fail: | |
2054 | if (fd >= 0) | |
a16e1123 | 2055 | close_nointr_nofail(fd); |
80876c20 LP |
2056 | |
2057 | if (notify >= 0) | |
a16e1123 | 2058 | close_nointr_nofail(notify); |
80876c20 LP |
2059 | |
2060 | return r; | |
2061 | } | |
2062 | ||
2063 | int release_terminal(void) { | |
e62d8c39 | 2064 | int r = 0; |
b92bea5d ZJS |
2065 | struct sigaction sa_old, sa_new = { |
2066 | .sa_handler = SIG_IGN, | |
2067 | .sa_flags = SA_RESTART, | |
2068 | }; | |
7fd1b19b | 2069 | _cleanup_close_ int fd; |
80876c20 | 2070 | |
e62d8c39 ZJS |
2071 | fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC); |
2072 | if (fd < 0) | |
80876c20 LP |
2073 | return -errno; |
2074 | ||
57cd2192 LP |
2075 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2076 | * by our own TIOCNOTTY */ | |
57cd2192 LP |
2077 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
2078 | ||
80876c20 LP |
2079 | if (ioctl(fd, TIOCNOTTY) < 0) |
2080 | r = -errno; | |
2081 | ||
57cd2192 LP |
2082 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2083 | ||
80876c20 LP |
2084 | return r; |
2085 | } | |
2086 | ||
9a34ec5f LP |
2087 | int sigaction_many(const struct sigaction *sa, ...) { |
2088 | va_list ap; | |
2089 | int r = 0, sig; | |
2090 | ||
2091 | va_start(ap, sa); | |
2092 | while ((sig = va_arg(ap, int)) > 0) | |
2093 | if (sigaction(sig, sa, NULL) < 0) | |
2094 | r = -errno; | |
2095 | va_end(ap); | |
2096 | ||
2097 | return r; | |
2098 | } | |
2099 | ||
2100 | int ignore_signals(int sig, ...) { | |
b92bea5d ZJS |
2101 | struct sigaction sa = { |
2102 | .sa_handler = SIG_IGN, | |
2103 | .sa_flags = SA_RESTART, | |
2104 | }; | |
9a34ec5f LP |
2105 | va_list ap; |
2106 | int r = 0; | |
a337c6fc | 2107 | |
a337c6fc | 2108 | |
9a34ec5f LP |
2109 | if (sigaction(sig, &sa, NULL) < 0) |
2110 | r = -errno; | |
2111 | ||
2112 | va_start(ap, sig); | |
2113 | while ((sig = va_arg(ap, int)) > 0) | |
2114 | if (sigaction(sig, &sa, NULL) < 0) | |
2115 | r = -errno; | |
2116 | va_end(ap); | |
2117 | ||
2118 | return r; | |
2119 | } | |
2120 | ||
2121 | int default_signals(int sig, ...) { | |
b92bea5d ZJS |
2122 | struct sigaction sa = { |
2123 | .sa_handler = SIG_DFL, | |
2124 | .sa_flags = SA_RESTART, | |
2125 | }; | |
9a34ec5f LP |
2126 | va_list ap; |
2127 | int r = 0; | |
2128 | ||
9a34ec5f LP |
2129 | if (sigaction(sig, &sa, NULL) < 0) |
2130 | r = -errno; | |
2131 | ||
2132 | va_start(ap, sig); | |
2133 | while ((sig = va_arg(ap, int)) > 0) | |
2134 | if (sigaction(sig, &sa, NULL) < 0) | |
2135 | r = -errno; | |
2136 | va_end(ap); | |
2137 | ||
2138 | return r; | |
a337c6fc LP |
2139 | } |
2140 | ||
8d567588 LP |
2141 | int close_pipe(int p[]) { |
2142 | int a = 0, b = 0; | |
2143 | ||
2144 | assert(p); | |
2145 | ||
2146 | if (p[0] >= 0) { | |
2147 | a = close_nointr(p[0]); | |
2148 | p[0] = -1; | |
2149 | } | |
2150 | ||
2151 | if (p[1] >= 0) { | |
2152 | b = close_nointr(p[1]); | |
2153 | p[1] = -1; | |
2154 | } | |
2155 | ||
2156 | return a < 0 ? a : b; | |
2157 | } | |
2158 | ||
eb22ac37 | 2159 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2160 | uint8_t *p; |
2161 | ssize_t n = 0; | |
2162 | ||
2163 | assert(fd >= 0); | |
2164 | assert(buf); | |
2165 | ||
2166 | p = buf; | |
2167 | ||
2168 | while (nbytes > 0) { | |
2169 | ssize_t k; | |
2170 | ||
2171 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2172 | ||
eb22ac37 | 2173 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2174 | continue; |
2175 | ||
eb22ac37 | 2176 | if (k < 0 && errno == EAGAIN && do_poll) { |
b92bea5d ZJS |
2177 | struct pollfd pollfd = { |
2178 | .fd = fd, | |
2179 | .events = POLLIN, | |
2180 | }; | |
8d567588 LP |
2181 | |
2182 | if (poll(&pollfd, 1, -1) < 0) { | |
2183 | if (errno == EINTR) | |
2184 | continue; | |
2185 | ||
2186 | return n > 0 ? n : -errno; | |
2187 | } | |
2188 | ||
2189 | if (pollfd.revents != POLLIN) | |
2190 | return n > 0 ? n : -EIO; | |
2191 | ||
2192 | continue; | |
2193 | } | |
2194 | ||
2195 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2196 | } | |
2197 | ||
2198 | p += k; | |
2199 | nbytes -= k; | |
2200 | n += k; | |
2201 | } | |
2202 | ||
2203 | return n; | |
2204 | } | |
2205 | ||
eb22ac37 LP |
2206 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2207 | const uint8_t *p; | |
2208 | ssize_t n = 0; | |
2209 | ||
2210 | assert(fd >= 0); | |
2211 | assert(buf); | |
2212 | ||
2213 | p = buf; | |
2214 | ||
2215 | while (nbytes > 0) { | |
2216 | ssize_t k; | |
2217 | ||
fe652127 LP |
2218 | k = write(fd, p, nbytes); |
2219 | if (k <= 0) { | |
eb22ac37 LP |
2220 | |
2221 | if (k < 0 && errno == EINTR) | |
2222 | continue; | |
2223 | ||
2224 | if (k < 0 && errno == EAGAIN && do_poll) { | |
b92bea5d ZJS |
2225 | struct pollfd pollfd = { |
2226 | .fd = fd, | |
2227 | .events = POLLOUT, | |
2228 | }; | |
eb22ac37 LP |
2229 | |
2230 | if (poll(&pollfd, 1, -1) < 0) { | |
2231 | if (errno == EINTR) | |
2232 | continue; | |
2233 | ||
2234 | return n > 0 ? n : -errno; | |
2235 | } | |
2236 | ||
2237 | if (pollfd.revents != POLLOUT) | |
2238 | return n > 0 ? n : -EIO; | |
2239 | ||
2240 | continue; | |
2241 | } | |
2242 | ||
2243 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2244 | } | |
2245 | ||
2246 | p += k; | |
2247 | nbytes -= k; | |
2248 | n += k; | |
2249 | } | |
2250 | ||
2251 | return n; | |
2252 | } | |
2253 | ||
ab1f0633 LP |
2254 | int parse_bytes(const char *t, off_t *bytes) { |
2255 | static const struct { | |
2256 | const char *suffix; | |
b32ff512 | 2257 | unsigned long long factor; |
ab1f0633 LP |
2258 | } table[] = { |
2259 | { "B", 1 }, | |
2260 | { "K", 1024ULL }, | |
2261 | { "M", 1024ULL*1024ULL }, | |
2262 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2263 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2264 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2265 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2266 | { "", 1 }, |
2267 | }; | |
2268 | ||
2269 | const char *p; | |
b32ff512 | 2270 | unsigned long long r = 0; |
ab1f0633 LP |
2271 | |
2272 | assert(t); | |
2273 | assert(bytes); | |
2274 | ||
2275 | p = t; | |
2276 | do { | |
2277 | long long l; | |
2278 | char *e; | |
2279 | unsigned i; | |
2280 | ||
2281 | errno = 0; | |
2282 | l = strtoll(p, &e, 10); | |
2283 | ||
8333c77e | 2284 | if (errno > 0) |
ab1f0633 LP |
2285 | return -errno; |
2286 | ||
2287 | if (l < 0) | |
2288 | return -ERANGE; | |
2289 | ||
2290 | if (e == p) | |
2291 | return -EINVAL; | |
2292 | ||
2293 | e += strspn(e, WHITESPACE); | |
2294 | ||
2295 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2296 | if (startswith(e, table[i].suffix)) { | |
b32ff512 ZJS |
2297 | unsigned long long tmp; |
2298 | if ((unsigned long long) l > ULLONG_MAX / table[i].factor) | |
2299 | return -ERANGE; | |
2300 | tmp = l * table[i].factor; | |
2301 | if (tmp > ULLONG_MAX - r) | |
2302 | return -ERANGE; | |
2303 | ||
2304 | r += tmp; | |
2305 | if ((unsigned long long) (off_t) r != r) | |
2306 | return -ERANGE; | |
2307 | ||
ab1f0633 LP |
2308 | p = e + strlen(table[i].suffix); |
2309 | break; | |
2310 | } | |
2311 | ||
2312 | if (i >= ELEMENTSOF(table)) | |
2313 | return -EINVAL; | |
2314 | ||
b32ff512 | 2315 | } while (*p); |
ab1f0633 LP |
2316 | |
2317 | *bytes = r; | |
2318 | ||
2319 | return 0; | |
2320 | } | |
2321 | ||
843d2643 LP |
2322 | int make_stdio(int fd) { |
2323 | int r, s, t; | |
2324 | ||
2325 | assert(fd >= 0); | |
2326 | ||
73836c5c LP |
2327 | r = dup3(fd, STDIN_FILENO, 0); |
2328 | s = dup3(fd, STDOUT_FILENO, 0); | |
2329 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2330 | |
2331 | if (fd >= 3) | |
2332 | close_nointr_nofail(fd); | |
2333 | ||
2334 | if (r < 0 || s < 0 || t < 0) | |
2335 | return -errno; | |
2336 | ||
73836c5c | 2337 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2338 | |
843d2643 LP |
2339 | return 0; |
2340 | } | |
2341 | ||
ade509ce LP |
2342 | int make_null_stdio(void) { |
2343 | int null_fd; | |
2344 | ||
cd3bd60a LP |
2345 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2346 | if (null_fd < 0) | |
ade509ce LP |
2347 | return -errno; |
2348 | ||
2349 | return make_stdio(null_fd); | |
2350 | } | |
2351 | ||
8407a5d0 LP |
2352 | bool is_device_path(const char *path) { |
2353 | ||
2354 | /* Returns true on paths that refer to a device, either in | |
2355 | * sysfs or in /dev */ | |
2356 | ||
2357 | return | |
2358 | path_startswith(path, "/dev/") || | |
2359 | path_startswith(path, "/sys/"); | |
2360 | } | |
2361 | ||
01f78473 | 2362 | int dir_is_empty(const char *path) { |
a05f97b3 | 2363 | _cleanup_closedir_ DIR *d; |
01f78473 | 2364 | int r; |
01f78473 | 2365 | |
a05f97b3 LP |
2366 | d = opendir(path); |
2367 | if (!d) | |
01f78473 LP |
2368 | return -errno; |
2369 | ||
2370 | for (;;) { | |
7d5e9c0f LP |
2371 | struct dirent *de; |
2372 | union dirent_storage buf; | |
01f78473 | 2373 | |
7d5e9c0f | 2374 | r = readdir_r(d, &buf.de, &de); |
a05f97b3 LP |
2375 | if (r > 0) |
2376 | return -r; | |
01f78473 | 2377 | |
a05f97b3 LP |
2378 | if (!de) |
2379 | return 1; | |
01f78473 | 2380 | |
a05f97b3 LP |
2381 | if (!ignore_file(de->d_name)) |
2382 | return 0; | |
2383 | } | |
01f78473 LP |
2384 | } |
2385 | ||
844ec79b ZJS |
2386 | char* dirname_malloc(const char *path) { |
2387 | char *d, *dir, *dir2; | |
2388 | ||
2389 | d = strdup(path); | |
2390 | if (!d) | |
2391 | return NULL; | |
2392 | dir = dirname(d); | |
2393 | assert(dir); | |
2394 | ||
2395 | if (dir != d) { | |
2396 | dir2 = strdup(dir); | |
2397 | free(d); | |
2398 | return dir2; | |
2399 | } | |
2400 | ||
2401 | return dir; | |
2402 | } | |
2403 | ||
d3782d60 | 2404 | unsigned long long random_ull(void) { |
a05f97b3 | 2405 | _cleanup_close_ int fd; |
d3782d60 LP |
2406 | uint64_t ull; |
2407 | ssize_t r; | |
2408 | ||
ac0930c8 LP |
2409 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2410 | if (fd < 0) | |
d3782d60 LP |
2411 | goto fallback; |
2412 | ||
eb22ac37 | 2413 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
2414 | if (r != sizeof(ull)) |
2415 | goto fallback; | |
2416 | ||
2417 | return ull; | |
2418 | ||
2419 | fallback: | |
2420 | return random() * RAND_MAX + random(); | |
2421 | } | |
2422 | ||
5b6319dc LP |
2423 | void rename_process(const char name[8]) { |
2424 | assert(name); | |
2425 | ||
5d6b1584 LP |
2426 | /* This is a like a poor man's setproctitle(). It changes the |
2427 | * comm field, argv[0], and also the glibc's internally used | |
2428 | * name of the process. For the first one a limit of 16 chars | |
2429 | * applies, to the second one usually one of 10 (i.e. length | |
2430 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2431 | * "systemd"). If you pass a longer string it will be | |
2432 | * truncated */ | |
5b6319dc | 2433 | |
5d6b1584 | 2434 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2435 | |
2436 | if (program_invocation_name) | |
2437 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2438 | |
2439 | if (saved_argc > 0) { | |
2440 | int i; | |
2441 | ||
2442 | if (saved_argv[0]) | |
2443 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2444 | ||
2445 | for (i = 1; i < saved_argc; i++) { | |
2446 | if (!saved_argv[i]) | |
2447 | break; | |
2448 | ||
2449 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
2450 | } | |
2451 | } | |
5b6319dc LP |
2452 | } |
2453 | ||
7d793605 LP |
2454 | void sigset_add_many(sigset_t *ss, ...) { |
2455 | va_list ap; | |
2456 | int sig; | |
2457 | ||
2458 | assert(ss); | |
2459 | ||
2460 | va_start(ap, ss); | |
2461 | while ((sig = va_arg(ap, int)) > 0) | |
2462 | assert_se(sigaddset(ss, sig) == 0); | |
2463 | va_end(ap); | |
2464 | } | |
2465 | ||
ef2f1067 LP |
2466 | char* gethostname_malloc(void) { |
2467 | struct utsname u; | |
2468 | ||
2469 | assert_se(uname(&u) >= 0); | |
2470 | ||
344de609 | 2471 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2472 | return strdup(u.nodename); |
2473 | ||
2474 | return strdup(u.sysname); | |
2475 | } | |
2476 | ||
344de609 LP |
2477 | bool hostname_is_set(void) { |
2478 | struct utsname u; | |
2479 | ||
2480 | assert_se(uname(&u) >= 0); | |
2481 | ||
2482 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2483 | } | |
2484 | ||
7c5f152a | 2485 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2486 | long bufsize; |
a05f97b3 LP |
2487 | char *name; |
2488 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2489 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2490 | |
2491 | /* Shortcut things to avoid NSS lookups */ | |
2492 | if (uid == 0) | |
2493 | return strdup("root"); | |
2494 | ||
7c5f152a LP |
2495 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2496 | if (bufsize <= 0) | |
ef2f1067 LP |
2497 | bufsize = 4096; |
2498 | ||
7c5f152a LP |
2499 | buf = malloc(bufsize); |
2500 | if (!buf) | |
ef2f1067 LP |
2501 | return NULL; |
2502 | ||
a05f97b3 LP |
2503 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2504 | return strdup(pw->pw_name); | |
ef2f1067 LP |
2505 | |
2506 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
2507 | return NULL; | |
2508 | ||
2509 | return name; | |
2510 | } | |
2511 | ||
7c5f152a LP |
2512 | char* getlogname_malloc(void) { |
2513 | uid_t uid; | |
2514 | struct stat st; | |
2515 | ||
2516 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2517 | uid = st.st_uid; | |
2518 | else | |
2519 | uid = getuid(); | |
2520 | ||
2521 | return lookup_uid(uid); | |
2522 | } | |
2523 | ||
2524 | char *getusername_malloc(void) { | |
2525 | const char *e; | |
2526 | ||
2527 | e = getenv("USER"); | |
2528 | if (e) | |
2529 | return strdup(e); | |
2530 | ||
2531 | return lookup_uid(getuid()); | |
2532 | } | |
2533 | ||
fc116c6a LP |
2534 | int getttyname_malloc(int fd, char **r) { |
2535 | char path[PATH_MAX], *c; | |
618e02c7 | 2536 | int k; |
8c6db833 LP |
2537 | |
2538 | assert(r); | |
ef2f1067 | 2539 | |
a05f97b3 LP |
2540 | k = ttyname_r(fd, path, sizeof(path)); |
2541 | if (k != 0) | |
618e02c7 | 2542 | return -k; |
ef2f1067 LP |
2543 | |
2544 | char_array_0(path); | |
2545 | ||
a05f97b3 LP |
2546 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2547 | if (!c) | |
8c6db833 LP |
2548 | return -ENOMEM; |
2549 | ||
2550 | *r = c; | |
2551 | return 0; | |
2552 | } | |
2553 | ||
fc116c6a LP |
2554 | int getttyname_harder(int fd, char **r) { |
2555 | int k; | |
2556 | char *s; | |
2557 | ||
a05f97b3 LP |
2558 | k = getttyname_malloc(fd, &s); |
2559 | if (k < 0) | |
fc116c6a LP |
2560 | return k; |
2561 | ||
2562 | if (streq(s, "tty")) { | |
2563 | free(s); | |
4d6d6518 | 2564 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2565 | } |
2566 | ||
2567 | *r = s; | |
2568 | return 0; | |
2569 | } | |
2570 | ||
4d6d6518 | 2571 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
49aa47c7 LP |
2572 | _cleanup_fclose_ FILE *f = NULL; |
2573 | char line[LINE_MAX], *p; | |
fc116c6a | 2574 | unsigned long ttynr; |
49aa47c7 LP |
2575 | const char *fn; |
2576 | int k; | |
fc116c6a | 2577 | |
49aa47c7 LP |
2578 | assert(pid >= 0); |
2579 | assert(d); | |
2580 | ||
2581 | if (pid == 0) | |
2582 | fn = "/proc/self/stat"; | |
2583 | else | |
2584 | fn = procfs_file_alloca(pid, "stat"); | |
4d6d6518 LP |
2585 | |
2586 | f = fopen(fn, "re"); | |
4d6d6518 | 2587 | if (!f) |
fc116c6a LP |
2588 | return -errno; |
2589 | ||
4d6d6518 | 2590 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 2591 | k = feof(f) ? -EIO : -errno; |
fc116c6a LP |
2592 | return k; |
2593 | } | |
2594 | ||
4d6d6518 LP |
2595 | p = strrchr(line, ')'); |
2596 | if (!p) | |
fc116c6a LP |
2597 | return -EIO; |
2598 | ||
2599 | p++; | |
2600 | ||
2601 | if (sscanf(p, " " | |
2602 | "%*c " /* state */ | |
2603 | "%*d " /* ppid */ | |
2604 | "%*d " /* pgrp */ | |
2605 | "%*d " /* session */ | |
2606 | "%lu ", /* ttynr */ | |
2607 | &ttynr) != 1) | |
2608 | return -EIO; | |
2609 | ||
11dc5d2b LP |
2610 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2611 | return -ENOENT; | |
2612 | ||
fc116c6a LP |
2613 | *d = (dev_t) ttynr; |
2614 | return 0; | |
2615 | } | |
2616 | ||
4d6d6518 | 2617 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 2618 | int k; |
fa70beaa | 2619 | char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *s, *b, *p; |
fc116c6a LP |
2620 | dev_t devnr; |
2621 | ||
2622 | assert(r); | |
2623 | ||
4d6d6518 LP |
2624 | k = get_ctty_devnr(pid, &devnr); |
2625 | if (k < 0) | |
fc116c6a LP |
2626 | return k; |
2627 | ||
2628 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
fc116c6a | 2629 | |
23406ce5 LP |
2630 | k = readlink_malloc(fn, &s); |
2631 | if (k < 0) { | |
fc116c6a LP |
2632 | |
2633 | if (k != -ENOENT) | |
2634 | return k; | |
2635 | ||
46824d0e LP |
2636 | /* This is an ugly hack */ |
2637 | if (major(devnr) == 136) { | |
2638 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
2639 | return -ENOMEM; | |
2640 | ||
2641 | *r = b; | |
2642 | if (_devnr) | |
2643 | *_devnr = devnr; | |
2644 | ||
2645 | return 0; | |
2646 | } | |
2647 | ||
fc116c6a LP |
2648 | /* Probably something like the ptys which have no |
2649 | * symlink in /dev/char. Let's return something | |
2650 | * vaguely useful. */ | |
2651 | ||
23406ce5 LP |
2652 | b = strdup(fn + 5); |
2653 | if (!b) | |
fc116c6a LP |
2654 | return -ENOMEM; |
2655 | ||
2656 | *r = b; | |
46824d0e LP |
2657 | if (_devnr) |
2658 | *_devnr = devnr; | |
2659 | ||
fc116c6a LP |
2660 | return 0; |
2661 | } | |
2662 | ||
2663 | if (startswith(s, "/dev/")) | |
2664 | p = s + 5; | |
2665 | else if (startswith(s, "../")) | |
2666 | p = s + 3; | |
2667 | else | |
2668 | p = s; | |
2669 | ||
2670 | b = strdup(p); | |
2671 | free(s); | |
2672 | ||
2673 | if (!b) | |
2674 | return -ENOMEM; | |
2675 | ||
2676 | *r = b; | |
46824d0e LP |
2677 | if (_devnr) |
2678 | *_devnr = devnr; | |
2679 | ||
fc116c6a LP |
2680 | return 0; |
2681 | } | |
2682 | ||
f56d5db9 | 2683 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
2684 | DIR *d; |
2685 | int ret = 0; | |
2686 | ||
2687 | assert(fd >= 0); | |
2688 | ||
2689 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2690 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2691 | |
d4d046e3 LP |
2692 | d = fdopendir(fd); |
2693 | if (!d) { | |
8c6db833 | 2694 | close_nointr_nofail(fd); |
4c633005 LP |
2695 | |
2696 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2697 | } |
2698 | ||
2699 | for (;;) { | |
7d5e9c0f LP |
2700 | struct dirent *de; |
2701 | union dirent_storage buf; | |
7925c22a LP |
2702 | bool is_dir, keep_around; |
2703 | struct stat st; | |
8c6db833 LP |
2704 | int r; |
2705 | ||
7d5e9c0f | 2706 | r = readdir_r(d, &buf.de, &de); |
d4d046e3 LP |
2707 | if (r != 0 && ret == 0) { |
2708 | ret = -r; | |
8c6db833 LP |
2709 | break; |
2710 | } | |
2711 | ||
2712 | if (!de) | |
2713 | break; | |
2714 | ||
2715 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
2716 | continue; | |
2717 | ||
7925c22a LP |
2718 | if (de->d_type == DT_UNKNOWN || |
2719 | honour_sticky || | |
2720 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2721 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2722 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2723 | ret = -errno; |
2724 | continue; | |
2725 | } | |
2726 | ||
2727 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2728 | keep_around = |
2729 | honour_sticky && | |
2730 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2731 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2732 | } else { |
8c6db833 | 2733 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2734 | keep_around = false; |
ad293f5a | 2735 | } |
8c6db833 LP |
2736 | |
2737 | if (is_dir) { | |
2738 | int subdir_fd; | |
8c6db833 | 2739 | |
597f43c7 | 2740 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
2741 | if (root_dev && st.st_dev != root_dev->st_dev) |
2742 | continue; | |
8c6db833 | 2743 | |
7925c22a LP |
2744 | subdir_fd = openat(fd, de->d_name, |
2745 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
2746 | if (subdir_fd < 0) { | |
2747 | if (ret == 0 && errno != ENOENT) | |
2748 | ret = -errno; | |
2749 | continue; | |
2750 | } | |
2751 | ||
b3d28469 | 2752 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
2753 | if (r < 0 && ret == 0) |
2754 | ret = r; | |
2755 | ||
2756 | if (!keep_around) | |
2757 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
2758 | if (ret == 0 && errno != ENOENT) |
2759 | ret = -errno; | |
2760 | } | |
2761 | ||
2762 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
2763 | |
2764 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 2765 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2766 | ret = -errno; |
2767 | } | |
2768 | } | |
2769 | } | |
2770 | ||
2771 | closedir(d); | |
2772 | ||
2773 | return ret; | |
2774 | } | |
2775 | ||
44a6b1b6 | 2776 | _pure_ static int is_temporary_fs(struct statfs *s) { |
943aad8c | 2777 | assert(s); |
bdd29249 | 2778 | return |
c51cf056 ZJS |
2779 | F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) || |
2780 | F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC); | |
943aad8c ZJS |
2781 | } |
2782 | ||
f56d5db9 LP |
2783 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
2784 | struct statfs s; | |
2785 | ||
2786 | assert(fd >= 0); | |
2787 | ||
2788 | if (fstatfs(fd, &s) < 0) { | |
2789 | close_nointr_nofail(fd); | |
2790 | return -errno; | |
2791 | } | |
2792 | ||
2793 | /* We refuse to clean disk file systems with this call. This | |
2794 | * is extra paranoia just to be sure we never ever remove | |
2795 | * non-state data */ | |
943aad8c | 2796 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2797 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2798 | close_nointr_nofail(fd); | |
2799 | return -EPERM; | |
2800 | } | |
2801 | ||
2802 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
2803 | } | |
2804 | ||
2805 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
2806 | int fd, r; | |
2807 | struct statfs s; | |
8c6db833 LP |
2808 | |
2809 | assert(path); | |
2810 | ||
f56d5db9 LP |
2811 | /* We refuse to clean the root file system with this |
2812 | * call. This is extra paranoia to never cause a really | |
2813 | * seriously broken system. */ | |
2814 | if (path_equal(path, "/")) { | |
2815 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
2816 | return -EPERM; | |
2817 | } | |
461b1822 | 2818 | |
d4d046e3 LP |
2819 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
2820 | if (fd < 0) { | |
8c6db833 LP |
2821 | |
2822 | if (errno != ENOTDIR) | |
2823 | return -errno; | |
2824 | ||
f56d5db9 LP |
2825 | if (!dangerous) { |
2826 | if (statfs(path, &s) < 0) | |
2827 | return -errno; | |
2828 | ||
943aad8c | 2829 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2830 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2831 | return -EPERM; | |
2832 | } | |
2833 | } | |
2834 | ||
8c6db833 | 2835 | if (delete_root && !only_dirs) |
d4d046e3 | 2836 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
2837 | return -errno; |
2838 | ||
2839 | return 0; | |
2840 | } | |
2841 | ||
f56d5db9 LP |
2842 | if (!dangerous) { |
2843 | if (fstatfs(fd, &s) < 0) { | |
2844 | close_nointr_nofail(fd); | |
2845 | return -errno; | |
2846 | } | |
ad293f5a | 2847 | |
943aad8c | 2848 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2849 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2850 | close_nointr_nofail(fd); | |
2851 | return -EPERM; | |
2852 | } | |
2853 | } | |
2854 | ||
2855 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
2856 | if (delete_root) { |
2857 | ||
8d53b453 | 2858 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 2859 | return r; |
8c6db833 | 2860 | |
e27796a0 | 2861 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
2862 | if (r == 0) |
2863 | r = -errno; | |
2864 | } | |
ad293f5a | 2865 | } |
8c6db833 LP |
2866 | |
2867 | return r; | |
2868 | } | |
2869 | ||
f56d5db9 LP |
2870 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
2871 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
2872 | } | |
2873 | ||
2874 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
2875 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
2876 | } | |
2877 | ||
8c6db833 LP |
2878 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
2879 | assert(path); | |
2880 | ||
2881 | /* Under the assumption that we are running privileged we | |
2882 | * first change the access mode and only then hand out | |
2883 | * ownership to avoid a window where access is too open. */ | |
2884 | ||
8d53b453 LP |
2885 | if (mode != (mode_t) -1) |
2886 | if (chmod(path, mode) < 0) | |
2887 | return -errno; | |
8c6db833 | 2888 | |
8d53b453 LP |
2889 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2890 | if (chown(path, uid, gid) < 0) | |
2891 | return -errno; | |
8c6db833 LP |
2892 | |
2893 | return 0; | |
ef2f1067 LP |
2894 | } |
2895 | ||
f4b47811 LP |
2896 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
2897 | assert(fd >= 0); | |
2898 | ||
2899 | /* Under the assumption that we are running privileged we | |
2900 | * first change the access mode and only then hand out | |
2901 | * ownership to avoid a window where access is too open. */ | |
2902 | ||
2903 | if (fchmod(fd, mode) < 0) | |
2904 | return -errno; | |
2905 | ||
2906 | if (fchown(fd, uid, gid) < 0) | |
2907 | return -errno; | |
2908 | ||
2909 | return 0; | |
2910 | } | |
2911 | ||
82c121a4 LP |
2912 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2913 | cpu_set_t *r; | |
2914 | unsigned n = 1024; | |
2915 | ||
2916 | /* Allocates the cpuset in the right size */ | |
2917 | ||
2918 | for (;;) { | |
2919 | if (!(r = CPU_ALLOC(n))) | |
2920 | return NULL; | |
2921 | ||
2922 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2923 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2924 | ||
2925 | if (ncpus) | |
2926 | *ncpus = n; | |
2927 | ||
2928 | return r; | |
2929 | } | |
2930 | ||
2931 | CPU_FREE(r); | |
2932 | ||
2933 | if (errno != EINVAL) | |
2934 | return NULL; | |
2935 | ||
2936 | n *= 2; | |
2937 | } | |
2938 | } | |
2939 | ||
984a2be4 | 2940 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) { |
9ab7a8d2 | 2941 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
2942 | _cleanup_free_ char *s = NULL; |
2943 | _cleanup_close_ int fd = -1; | |
b92bea5d | 2944 | struct iovec iovec[6] = {}; |
81beb750 | 2945 | int n = 0; |
984a2be4 | 2946 | static bool prev_ephemeral; |
9e58ff9c LP |
2947 | |
2948 | assert(format); | |
2949 | ||
9ab7a8d2 | 2950 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
2951 | * optional and go exclusively to the console. */ |
2952 | ||
2953 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 2954 | return log_oom(); |
9e58ff9c | 2955 | |
67e5cc4f | 2956 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 2957 | if (fd < 0) |
669bec5d | 2958 | return fd; |
9e58ff9c | 2959 | |
67e5cc4f | 2960 | if (ellipse) { |
9ab7a8d2 MS |
2961 | char *e; |
2962 | size_t emax, sl; | |
2963 | int c; | |
2964 | ||
67e5cc4f LP |
2965 | c = fd_columns(fd); |
2966 | if (c <= 0) | |
2967 | c = 80; | |
81beb750 | 2968 | |
669bec5d | 2969 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
2970 | |
2971 | emax = c - sl - 1; | |
2972 | if (emax < 3) | |
2973 | emax = 3; | |
81beb750 | 2974 | |
67e5cc4f LP |
2975 | e = ellipsize(s, emax, 75); |
2976 | if (e) { | |
2977 | free(s); | |
2978 | s = e; | |
2979 | } | |
81beb750 LP |
2980 | } |
2981 | ||
984a2be4 MS |
2982 | if (prev_ephemeral) |
2983 | IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE); | |
2984 | prev_ephemeral = ephemeral; | |
2985 | ||
9ab7a8d2 MS |
2986 | if (status) { |
2987 | if (!isempty(status)) { | |
2988 | IOVEC_SET_STRING(iovec[n++], "["); | |
2989 | IOVEC_SET_STRING(iovec[n++], status); | |
2990 | IOVEC_SET_STRING(iovec[n++], "] "); | |
2991 | } else | |
2992 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
2993 | } |
2994 | ||
9ab7a8d2 | 2995 | IOVEC_SET_STRING(iovec[n++], s); |
984a2be4 MS |
2996 | if (!ephemeral) |
2997 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 2998 | |
669bec5d LP |
2999 | if (writev(fd, iovec, n) < 0) |
3000 | return -errno; | |
9e58ff9c | 3001 | |
669bec5d | 3002 | return 0; |
9e58ff9c LP |
3003 | } |
3004 | ||
984a2be4 | 3005 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) { |
c846ff47 | 3006 | va_list ap; |
669bec5d | 3007 | int r; |
c846ff47 LP |
3008 | |
3009 | assert(format); | |
3010 | ||
3011 | va_start(ap, format); | |
984a2be4 | 3012 | r = status_vprintf(status, ellipse, ephemeral, format, ap); |
c846ff47 | 3013 | va_end(ap); |
669bec5d LP |
3014 | |
3015 | return r; | |
c846ff47 LP |
3016 | } |
3017 | ||
669bec5d | 3018 | int status_welcome(void) { |
10aa7034 | 3019 | int r; |
669bec5d LP |
3020 | _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL; |
3021 | ||
3022 | r = parse_env_file("/etc/os-release", NEWLINE, | |
3023 | "PRETTY_NAME", &pretty_name, | |
3024 | "ANSI_COLOR", &ansi_color, | |
3025 | NULL); | |
3026 | if (r < 0 && r != -ENOENT) | |
3027 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3028 | ||
f620dff8 | 3029 | return status_printf(NULL, false, false, |
669bec5d LP |
3030 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", |
3031 | isempty(ansi_color) ? "1" : ansi_color, | |
3032 | isempty(pretty_name) ? "Linux" : pretty_name); | |
c846ff47 LP |
3033 | } |
3034 | ||
fab56fc5 LP |
3035 | char *replace_env(const char *format, char **env) { |
3036 | enum { | |
3037 | WORD, | |
c24eb49e | 3038 | CURLY, |
fab56fc5 LP |
3039 | VARIABLE |
3040 | } state = WORD; | |
3041 | ||
3042 | const char *e, *word = format; | |
3043 | char *r = NULL, *k; | |
3044 | ||
3045 | assert(format); | |
3046 | ||
3047 | for (e = format; *e; e ++) { | |
3048 | ||
3049 | switch (state) { | |
3050 | ||
3051 | case WORD: | |
3052 | if (*e == '$') | |
c24eb49e | 3053 | state = CURLY; |
fab56fc5 LP |
3054 | break; |
3055 | ||
c24eb49e LP |
3056 | case CURLY: |
3057 | if (*e == '{') { | |
fab56fc5 LP |
3058 | if (!(k = strnappend(r, word, e-word-1))) |
3059 | goto fail; | |
3060 | ||
3061 | free(r); | |
3062 | r = k; | |
3063 | ||
3064 | word = e-1; | |
3065 | state = VARIABLE; | |
3066 | ||
3067 | } else if (*e == '$') { | |
3068 | if (!(k = strnappend(r, word, e-word))) | |
3069 | goto fail; | |
3070 | ||
3071 | free(r); | |
3072 | r = k; | |
3073 | ||
3074 | word = e+1; | |
3075 | state = WORD; | |
3076 | } else | |
3077 | state = WORD; | |
3078 | break; | |
3079 | ||
3080 | case VARIABLE: | |
c24eb49e | 3081 | if (*e == '}') { |
b95cf362 | 3082 | const char *t; |
fab56fc5 | 3083 | |
4d1a6904 | 3084 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 3085 | |
4d1a6904 LP |
3086 | k = strappend(r, t); |
3087 | if (!k) | |
b95cf362 | 3088 | goto fail; |
fab56fc5 | 3089 | |
b95cf362 LP |
3090 | free(r); |
3091 | r = k; | |
fab56fc5 | 3092 | |
b95cf362 | 3093 | word = e+1; |
fab56fc5 LP |
3094 | state = WORD; |
3095 | } | |
3096 | break; | |
3097 | } | |
3098 | } | |
3099 | ||
3100 | if (!(k = strnappend(r, word, e-word))) | |
3101 | goto fail; | |
3102 | ||
3103 | free(r); | |
3104 | return k; | |
3105 | ||
3106 | fail: | |
3107 | free(r); | |
3108 | return NULL; | |
3109 | } | |
3110 | ||
3111 | char **replace_env_argv(char **argv, char **env) { | |
3112 | char **r, **i; | |
c24eb49e LP |
3113 | unsigned k = 0, l = 0; |
3114 | ||
3115 | l = strv_length(argv); | |
fab56fc5 | 3116 | |
c24eb49e | 3117 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3118 | return NULL; |
3119 | ||
3120 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3121 | |
3122 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3123 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3124 | char *e; | |
3125 | char **w, **m; | |
3126 | unsigned q; | |
c24eb49e | 3127 | |
4d1a6904 LP |
3128 | e = strv_env_get(env, *i+1); |
3129 | if (e) { | |
c24eb49e LP |
3130 | |
3131 | if (!(m = strv_split_quoted(e))) { | |
3132 | r[k] = NULL; | |
3133 | strv_free(r); | |
3134 | return NULL; | |
3135 | } | |
b95cf362 LP |
3136 | } else |
3137 | m = NULL; | |
c24eb49e | 3138 | |
b95cf362 LP |
3139 | q = strv_length(m); |
3140 | l = l + q - 1; | |
c24eb49e | 3141 | |
b95cf362 LP |
3142 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3143 | r[k] = NULL; | |
3144 | strv_free(r); | |
3145 | strv_free(m); | |
3146 | return NULL; | |
3147 | } | |
c24eb49e | 3148 | |
b95cf362 LP |
3149 | r = w; |
3150 | if (m) { | |
c24eb49e LP |
3151 | memcpy(r + k, m, q * sizeof(char*)); |
3152 | free(m); | |
c24eb49e | 3153 | } |
b95cf362 LP |
3154 | |
3155 | k += q; | |
3156 | continue; | |
c24eb49e LP |
3157 | } |
3158 | ||
3159 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3160 | if (!(r[k++] = replace_env(*i, env))) { |
3161 | strv_free(r); | |
3162 | return NULL; | |
3163 | } | |
3164 | } | |
3165 | ||
3166 | r[k] = NULL; | |
3167 | return r; | |
3168 | } | |
3169 | ||
81beb750 | 3170 | int fd_columns(int fd) { |
b92bea5d | 3171 | struct winsize ws = {}; |
81beb750 LP |
3172 | |
3173 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3174 | return -errno; | |
3175 | ||
3176 | if (ws.ws_col <= 0) | |
3177 | return -EIO; | |
3178 | ||
3179 | return ws.ws_col; | |
3180 | } | |
3181 | ||
28917d7d | 3182 | unsigned columns(void) { |
fa776d8e | 3183 | const char *e; |
7009eec2 | 3184 | int c; |
fa776d8e | 3185 | |
28917d7d LP |
3186 | if (_likely_(cached_columns > 0)) |
3187 | return cached_columns; | |
11f96fac | 3188 | |
28917d7d LP |
3189 | c = 0; |
3190 | e = getenv("COLUMNS"); | |
3191 | if (e) | |
7009eec2 | 3192 | safe_atoi(e, &c); |
fa776d8e | 3193 | |
28917d7d LP |
3194 | if (c <= 0) |
3195 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3196 | |
28917d7d LP |
3197 | if (c <= 0) |
3198 | c = 80; | |
11f96fac | 3199 | |
28917d7d LP |
3200 | cached_columns = c; |
3201 | return c; | |
11f96fac ZJS |
3202 | } |
3203 | ||
8f2d43a0 | 3204 | int fd_lines(int fd) { |
b92bea5d | 3205 | struct winsize ws = {}; |
8f2d43a0 LP |
3206 | |
3207 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3208 | return -errno; | |
3209 | ||
3210 | if (ws.ws_row <= 0) | |
3211 | return -EIO; | |
3212 | ||
3213 | return ws.ws_row; | |
3214 | } | |
3215 | ||
3216 | unsigned lines(void) { | |
8f2d43a0 | 3217 | const char *e; |
ed757c0c | 3218 | unsigned l; |
8f2d43a0 | 3219 | |
ed757c0c LP |
3220 | if (_likely_(cached_lines > 0)) |
3221 | return cached_lines; | |
8f2d43a0 | 3222 | |
ed757c0c | 3223 | l = 0; |
8f2d43a0 LP |
3224 | e = getenv("LINES"); |
3225 | if (e) | |
ed757c0c | 3226 | safe_atou(e, &l); |
8f2d43a0 | 3227 | |
ed757c0c LP |
3228 | if (l <= 0) |
3229 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3230 | |
ed757c0c LP |
3231 | if (l <= 0) |
3232 | l = 24; | |
8f2d43a0 | 3233 | |
ed757c0c LP |
3234 | cached_lines = l; |
3235 | return cached_lines; | |
3236 | } | |
3237 | ||
3238 | /* intended to be used as a SIGWINCH sighandler */ | |
3239 | void columns_lines_cache_reset(int signum) { | |
3240 | cached_columns = 0; | |
3241 | cached_lines = 0; | |
3242 | } | |
3243 | ||
3244 | bool on_tty(void) { | |
3245 | static int cached_on_tty = -1; | |
3246 | ||
3247 | if (_unlikely_(cached_on_tty < 0)) | |
3248 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3249 | ||
3250 | return cached_on_tty; | |
8f2d43a0 LP |
3251 | } |
3252 | ||
b4f10a5e | 3253 | int running_in_chroot(void) { |
b92bea5d | 3254 | struct stat a = {}, b = {}; |
b4f10a5e LP |
3255 | |
3256 | /* Only works as root */ | |
b4f10a5e LP |
3257 | if (stat("/proc/1/root", &a) < 0) |
3258 | return -errno; | |
3259 | ||
3260 | if (stat("/", &b) < 0) | |
3261 | return -errno; | |
3262 | ||
3263 | return | |
3264 | a.st_dev != b.st_dev || | |
3265 | a.st_ino != b.st_ino; | |
3266 | } | |
3267 | ||
72f59706 LP |
3268 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3269 | size_t x; | |
8fe914ec LP |
3270 | char *r; |
3271 | ||
3272 | assert(s); | |
3273 | assert(percent <= 100); | |
72f59706 | 3274 | assert(new_length >= 3); |
8fe914ec | 3275 | |
72f59706 LP |
3276 | if (old_length <= 3 || old_length <= new_length) |
3277 | return strndup(s, old_length); | |
8fe914ec | 3278 | |
72f59706 LP |
3279 | r = new0(char, new_length+1); |
3280 | if (!r) | |
a6f0104a | 3281 | return NULL; |
8fe914ec | 3282 | |
72f59706 | 3283 | x = (new_length * percent) / 100; |
8fe914ec | 3284 | |
72f59706 LP |
3285 | if (x > new_length - 3) |
3286 | x = new_length - 3; | |
8fe914ec LP |
3287 | |
3288 | memcpy(r, s, x); | |
3289 | r[x] = '.'; | |
3290 | r[x+1] = '.'; | |
3291 | r[x+2] = '.'; | |
3292 | memcpy(r + x + 3, | |
72f59706 LP |
3293 | s + old_length - (new_length - x - 3), |
3294 | new_length - x - 3); | |
8fe914ec LP |
3295 | |
3296 | return r; | |
3297 | } | |
3298 | ||
72f59706 LP |
3299 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3300 | return ellipsize_mem(s, strlen(s), length, percent); | |
3301 | } | |
3302 | ||
f6144808 LP |
3303 | int touch(const char *path) { |
3304 | int fd; | |
3305 | ||
3306 | assert(path); | |
3307 | ||
73836c5c LP |
3308 | /* This just opens the file for writing, ensuring it |
3309 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3310 | * does it. */ | |
3311 | ||
3312 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3313 | if (fd < 0) | |
f6144808 LP |
3314 | return -errno; |
3315 | ||
3316 | close_nointr_nofail(fd); | |
3317 | return 0; | |
3318 | } | |
afea26ad | 3319 | |
97c4a07d | 3320 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3321 | size_t l; |
3322 | assert(s); | |
3323 | ||
73836c5c LP |
3324 | /* This is rather stupid, simply removes the heading and |
3325 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3326 | * escaping or anything. We should make this smarter one |
3327 | * day...*/ | |
73836c5c | 3328 | |
31ed59c5 LP |
3329 | l = strlen(s); |
3330 | if (l < 2) | |
11ce3427 LP |
3331 | return strdup(s); |
3332 | ||
97c4a07d | 3333 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3334 | return strndup(s+1, l-2); |
3335 | ||
3336 | return strdup(s); | |
3337 | } | |
3338 | ||
5f7c426e | 3339 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3340 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3341 | char *eq, *r; | |
5f7c426e | 3342 | |
57f30678 LP |
3343 | eq = strchr(s, '='); |
3344 | if (!eq) { | |
3345 | char *t; | |
5f7c426e | 3346 | |
57f30678 LP |
3347 | r = strdup(s); |
3348 | if (!r) | |
5f7c426e LP |
3349 | return NULL; |
3350 | ||
57f30678 LP |
3351 | t = strstrip(r); |
3352 | if (t == r) | |
3353 | return r; | |
3354 | ||
3355 | memmove(r, t, strlen(t) + 1); | |
3356 | return r; | |
5f7c426e LP |
3357 | } |
3358 | ||
57f30678 LP |
3359 | name = strndup(s, eq - s); |
3360 | if (!name) | |
5f7c426e LP |
3361 | return NULL; |
3362 | ||
57f30678 LP |
3363 | p = strdup(eq + 1); |
3364 | if (!p) | |
5f7c426e | 3365 | return NULL; |
5f7c426e LP |
3366 | |
3367 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3368 | if (!value) |
5f7c426e | 3369 | return NULL; |
5f7c426e | 3370 | |
57f30678 | 3371 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3372 | r = NULL; |
3373 | ||
5f7c426e LP |
3374 | return r; |
3375 | } | |
3376 | ||
8e12a6ae | 3377 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3378 | siginfo_t dummy; |
3379 | ||
2e78aa99 | 3380 | assert(pid >= 1); |
1968a360 LP |
3381 | |
3382 | if (!status) | |
3383 | status = &dummy; | |
2e78aa99 LP |
3384 | |
3385 | for (;;) { | |
8e12a6ae LP |
3386 | zero(*status); |
3387 | ||
3388 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3389 | |
3390 | if (errno == EINTR) | |
3391 | continue; | |
3392 | ||
3393 | return -errno; | |
3394 | } | |
3395 | ||
3396 | return 0; | |
3397 | } | |
3398 | } | |
3399 | ||
97c4a07d LP |
3400 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3401 | int r; | |
3402 | siginfo_t status; | |
3403 | ||
3404 | assert(name); | |
3405 | assert(pid > 1); | |
3406 | ||
d87be9b0 LP |
3407 | r = wait_for_terminate(pid, &status); |
3408 | if (r < 0) { | |
97c4a07d LP |
3409 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3410 | return r; | |
3411 | } | |
3412 | ||
3413 | if (status.si_code == CLD_EXITED) { | |
3414 | if (status.si_status != 0) { | |
3415 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3416 | return status.si_status; |
97c4a07d LP |
3417 | } |
3418 | ||
3419 | log_debug("%s succeeded.", name); | |
3420 | return 0; | |
3421 | ||
3422 | } else if (status.si_code == CLD_KILLED || | |
3423 | status.si_code == CLD_DUMPED) { | |
3424 | ||
3425 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3426 | return -EPROTO; | |
3427 | } | |
3428 | ||
3429 | log_warning("%s failed due to unknown reason.", name); | |
3430 | return -EPROTO; | |
97c4a07d LP |
3431 | } |
3432 | ||
6a39419f | 3433 | _noreturn_ void freeze(void) { |
720ce21d LP |
3434 | |
3435 | /* Make sure nobody waits for us on a socket anymore */ | |
3436 | close_all_fds(NULL, 0); | |
3437 | ||
c29597a1 LP |
3438 | sync(); |
3439 | ||
3c14d26c LP |
3440 | for (;;) |
3441 | pause(); | |
3442 | } | |
3443 | ||
00dc5d76 LP |
3444 | bool null_or_empty(struct stat *st) { |
3445 | assert(st); | |
3446 | ||
3447 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3448 | return true; | |
3449 | ||
c8f26f42 | 3450 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3451 | return true; |
3452 | ||
3453 | return false; | |
3454 | } | |
3455 | ||
83096483 LP |
3456 | int null_or_empty_path(const char *fn) { |
3457 | struct stat st; | |
3458 | ||
3459 | assert(fn); | |
3460 | ||
3461 | if (stat(fn, &st) < 0) | |
3462 | return -errno; | |
3463 | ||
3464 | return null_or_empty(&st); | |
3465 | } | |
3466 | ||
a247755d | 3467 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3468 | int nfd; |
3469 | DIR *d; | |
3470 | ||
dd94c17e LP |
3471 | assert(!(flags & O_CREAT)); |
3472 | ||
3473 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
73836c5c | 3474 | if (nfd < 0) |
c4731d11 LP |
3475 | return NULL; |
3476 | ||
73836c5c LP |
3477 | d = fdopendir(nfd); |
3478 | if (!d) { | |
c4731d11 LP |
3479 | close_nointr_nofail(nfd); |
3480 | return NULL; | |
3481 | } | |
3482 | ||
3483 | return d; | |
3b63d2d3 LP |
3484 | } |
3485 | ||
8a0867d6 LP |
3486 | int signal_from_string_try_harder(const char *s) { |
3487 | int signo; | |
3488 | assert(s); | |
3489 | ||
73836c5c LP |
3490 | signo = signal_from_string(s); |
3491 | if (signo <= 0) | |
8a0867d6 LP |
3492 | if (startswith(s, "SIG")) |
3493 | return signal_from_string(s+3); | |
3494 | ||
3495 | return signo; | |
3496 | } | |
3497 | ||
383182b5 | 3498 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
22f5f628 DR |
3499 | _cleanup_free_ char *t = NULL, *u = NULL; |
3500 | char *dn; | |
3501 | size_t enc_len; | |
e23a0ce8 | 3502 | |
383182b5 DR |
3503 | u = unquote(tagvalue, "\"\'"); |
3504 | if (u == NULL) | |
3505 | return NULL; | |
e23a0ce8 | 3506 | |
22f5f628 DR |
3507 | enc_len = strlen(u) * 4; |
3508 | t = new(char, enc_len); | |
383182b5 DR |
3509 | if (t == NULL) |
3510 | return NULL; | |
e23a0ce8 | 3511 | |
22f5f628 DR |
3512 | if (udev_encode_string(u, t, enc_len) < 0) |
3513 | return NULL; | |
e23a0ce8 | 3514 | |
22f5f628 | 3515 | if (asprintf(&dn, "/dev/disk/by-%s/%s", by, t) < 0) |
383182b5 | 3516 | return NULL; |
e23a0ce8 | 3517 | |
383182b5 DR |
3518 | return dn; |
3519 | } | |
e23a0ce8 | 3520 | |
383182b5 | 3521 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3522 | assert(p); |
3523 | ||
383182b5 DR |
3524 | if (startswith(p, "LABEL=")) |
3525 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3526 | |
383182b5 DR |
3527 | if (startswith(p, "UUID=")) |
3528 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3529 | |
84cc2abf DR |
3530 | if (startswith(p, "PARTUUID=")) |
3531 | return tag_to_udev_node(p+9, "partuuid"); | |
3532 | ||
3533 | if (startswith(p, "PARTLABEL=")) | |
3534 | return tag_to_udev_node(p+10, "partlabel"); | |
3535 | ||
e23a0ce8 LP |
3536 | return strdup(p); |
3537 | } | |
3538 | ||
f212ac12 LP |
3539 | bool tty_is_vc(const char *tty) { |
3540 | assert(tty); | |
3541 | ||
3542 | if (startswith(tty, "/dev/")) | |
3543 | tty += 5; | |
3544 | ||
98a28fef LP |
3545 | return vtnr_from_tty(tty) >= 0; |
3546 | } | |
3547 | ||
d1122ad5 LP |
3548 | bool tty_is_console(const char *tty) { |
3549 | assert(tty); | |
3550 | ||
3551 | if (startswith(tty, "/dev/")) | |
3552 | tty += 5; | |
3553 | ||
3554 | return streq(tty, "console"); | |
3555 | } | |
3556 | ||
98a28fef LP |
3557 | int vtnr_from_tty(const char *tty) { |
3558 | int i, r; | |
3559 | ||
3560 | assert(tty); | |
3561 | ||
3562 | if (startswith(tty, "/dev/")) | |
3563 | tty += 5; | |
3564 | ||
3565 | if (!startswith(tty, "tty") ) | |
3566 | return -EINVAL; | |
3567 | ||
3568 | if (tty[3] < '0' || tty[3] > '9') | |
3569 | return -EINVAL; | |
3570 | ||
3571 | r = safe_atoi(tty+3, &i); | |
3572 | if (r < 0) | |
3573 | return r; | |
3574 | ||
3575 | if (i < 0 || i > 63) | |
3576 | return -EINVAL; | |
3577 | ||
3578 | return i; | |
f212ac12 LP |
3579 | } |
3580 | ||
21baf21a MS |
3581 | char *resolve_dev_console(char **active) { |
3582 | char *tty; | |
3583 | ||
3584 | /* Resolve where /dev/console is pointing to, if /sys is actually ours | |
3585 | * (i.e. not read-only-mounted which is a sign for container setups) */ | |
3586 | ||
3587 | if (path_is_read_only_fs("/sys") > 0) | |
3588 | return NULL; | |
3589 | ||
3590 | if (read_one_line_file("/sys/class/tty/console/active", active) < 0) | |
3591 | return NULL; | |
3592 | ||
3593 | /* If multiple log outputs are configured the last one is what | |
3594 | * /dev/console points to */ | |
3595 | tty = strrchr(*active, ' '); | |
3596 | if (tty) | |
3597 | tty++; | |
3598 | else | |
3599 | tty = *active; | |
3600 | ||
3601 | return tty; | |
3602 | } | |
3603 | ||
3043935f | 3604 | bool tty_is_vc_resolve(const char *tty) { |
3030ccd7 | 3605 | char *active = NULL; |
3043935f | 3606 | bool b; |
3030ccd7 | 3607 | |
e3aa71c3 LP |
3608 | assert(tty); |
3609 | ||
3610 | if (startswith(tty, "/dev/")) | |
3611 | tty += 5; | |
3612 | ||
21baf21a MS |
3613 | if (streq(tty, "console")) { |
3614 | tty = resolve_dev_console(&active); | |
3615 | if (!tty) | |
3616 | return false; | |
3617 | } | |
3030ccd7 | 3618 | |
3043935f | 3619 | b = tty_is_vc(tty); |
3030ccd7 | 3620 | free(active); |
e3aa71c3 | 3621 | |
3043935f LP |
3622 | return b; |
3623 | } | |
3624 | ||
3625 | const char *default_term_for_tty(const char *tty) { | |
3626 | assert(tty); | |
3627 | ||
acda6a05 | 3628 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3629 | } |
3630 | ||
87d2c1ff | 3631 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3632 | assert(de); |
3633 | ||
3634 | if (ignore_file(de->d_name)) | |
3635 | return false; | |
3636 | ||
3637 | if (de->d_type != DT_REG && | |
3638 | de->d_type != DT_LNK && | |
3639 | de->d_type != DT_UNKNOWN) | |
3640 | return false; | |
3641 | ||
3642 | return true; | |
3643 | } | |
3644 | ||
87d2c1ff LP |
3645 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3646 | assert(de); | |
3647 | ||
a228a22f LP |
3648 | if (de->d_type != DT_REG && |
3649 | de->d_type != DT_LNK && | |
3650 | de->d_type != DT_UNKNOWN) | |
3651 | return false; | |
3652 | ||
3653 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3654 | return false; |
3655 | ||
3656 | return endswith(de->d_name, suffix); | |
3657 | } | |
3658 | ||
83cc030f LP |
3659 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
3660 | DIR *_d = NULL; | |
3661 | struct dirent *de; | |
3662 | Hashmap *pids = NULL; | |
3663 | ||
3664 | assert(directory); | |
3665 | ||
650001c6 JJ |
3666 | /* Executes all binaries in a directory in parallel and |
3667 | * waits for them to finish. */ | |
83cc030f LP |
3668 | |
3669 | if (!d) { | |
3670 | if (!(_d = opendir(directory))) { | |
3671 | ||
3672 | if (errno == ENOENT) | |
3673 | return; | |
3674 | ||
3675 | log_error("Failed to enumerate directory %s: %m", directory); | |
3676 | return; | |
3677 | } | |
3678 | ||
3679 | d = _d; | |
3680 | } | |
3681 | ||
3682 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
3683 | log_error("Failed to allocate set."); | |
3684 | goto finish; | |
3685 | } | |
3686 | ||
3687 | while ((de = readdir(d))) { | |
3688 | char *path; | |
3689 | pid_t pid; | |
3690 | int k; | |
3691 | ||
fb19a739 | 3692 | if (!dirent_is_file(de)) |
83cc030f LP |
3693 | continue; |
3694 | ||
3695 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 3696 | log_oom(); |
83cc030f LP |
3697 | continue; |
3698 | } | |
3699 | ||
3700 | if ((pid = fork()) < 0) { | |
3701 | log_error("Failed to fork: %m"); | |
3702 | free(path); | |
3703 | continue; | |
3704 | } | |
3705 | ||
3706 | if (pid == 0) { | |
3707 | char *_argv[2]; | |
3708 | /* Child */ | |
3709 | ||
3710 | if (!argv) { | |
3711 | _argv[0] = path; | |
3712 | _argv[1] = NULL; | |
3713 | argv = _argv; | |
3714 | } else | |
6edd7d0a | 3715 | argv[0] = path; |
83cc030f LP |
3716 | |
3717 | execv(path, argv); | |
3718 | ||
3719 | log_error("Failed to execute %s: %m", path); | |
3720 | _exit(EXIT_FAILURE); | |
3721 | } | |
3722 | ||
3723 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
3724 | ||
3725 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
3726 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
3727 | free(path); | |
3728 | } | |
3729 | } | |
3730 | ||
3731 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 3732 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
b92bea5d | 3733 | siginfo_t si = {}; |
83cc030f LP |
3734 | char *path; |
3735 | ||
ec3f9b53 | 3736 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
3737 | |
3738 | if (errno == EINTR) | |
3739 | continue; | |
3740 | ||
3741 | log_error("waitid() failed: %m"); | |
3742 | goto finish; | |
3743 | } | |
3744 | ||
3745 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 3746 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
3747 | if (si.si_code == CLD_EXITED) |
3748 | log_error("%s exited with exit status %i.", path, si.si_status); | |
3749 | else | |
3750 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
3751 | } else | |
3752 | log_debug("%s exited successfully.", path); | |
3753 | ||
3754 | free(path); | |
3755 | } | |
3756 | } | |
3757 | ||
3758 | finish: | |
3759 | if (_d) | |
3760 | closedir(_d); | |
3761 | ||
3762 | if (pids) | |
3763 | hashmap_free_free(pids); | |
3764 | } | |
3765 | ||
430c18ed LP |
3766 | int kill_and_sigcont(pid_t pid, int sig) { |
3767 | int r; | |
3768 | ||
3769 | r = kill(pid, sig) < 0 ? -errno : 0; | |
3770 | ||
3771 | if (r >= 0) | |
3772 | kill(pid, SIGCONT); | |
3773 | ||
3774 | return r; | |
3775 | } | |
3776 | ||
05feefe0 LP |
3777 | bool nulstr_contains(const char*nulstr, const char *needle) { |
3778 | const char *i; | |
3779 | ||
3780 | if (!nulstr) | |
3781 | return false; | |
3782 | ||
3783 | NULSTR_FOREACH(i, nulstr) | |
3784 | if (streq(i, needle)) | |
3785 | return true; | |
3786 | ||
3787 | return false; | |
3788 | } | |
3789 | ||
6faa1114 | 3790 | bool plymouth_running(void) { |
9408a2d2 | 3791 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
3792 | } |
3793 | ||
9beb3f4d LP |
3794 | char* strshorten(char *s, size_t l) { |
3795 | assert(s); | |
3796 | ||
3797 | if (l < strlen(s)) | |
3798 | s[l] = 0; | |
3799 | ||
3800 | return s; | |
3801 | } | |
3802 | ||
3803 | static bool hostname_valid_char(char c) { | |
3804 | return | |
3805 | (c >= 'a' && c <= 'z') || | |
3806 | (c >= 'A' && c <= 'Z') || | |
3807 | (c >= '0' && c <= '9') || | |
3808 | c == '-' || | |
3809 | c == '_' || | |
3810 | c == '.'; | |
3811 | } | |
3812 | ||
3813 | bool hostname_is_valid(const char *s) { | |
3814 | const char *p; | |
aa3c5cf8 | 3815 | bool dot; |
9beb3f4d LP |
3816 | |
3817 | if (isempty(s)) | |
3818 | return false; | |
3819 | ||
aa3c5cf8 LP |
3820 | for (p = s, dot = true; *p; p++) { |
3821 | if (*p == '.') { | |
3822 | if (dot) | |
3823 | return false; | |
3824 | ||
3825 | dot = true; | |
3826 | } else { | |
3827 | if (!hostname_valid_char(*p)) | |
3828 | return false; | |
3829 | ||
3830 | dot = false; | |
3831 | } | |
3832 | } | |
3833 | ||
3834 | if (dot) | |
3835 | return false; | |
9beb3f4d LP |
3836 | |
3837 | if (p-s > HOST_NAME_MAX) | |
3838 | return false; | |
3839 | ||
3840 | return true; | |
3841 | } | |
3842 | ||
e724b063 | 3843 | char* hostname_cleanup(char *s, bool lowercase) { |
9beb3f4d | 3844 | char *p, *d; |
cec4ead9 LP |
3845 | bool dot; |
3846 | ||
3847 | for (p = s, d = s, dot = true; *p; p++) { | |
3848 | if (*p == '.') { | |
e724b063 | 3849 | if (dot) |
cec4ead9 | 3850 | continue; |
9beb3f4d | 3851 | |
e724b063 | 3852 | *(d++) = '.'; |
cec4ead9 | 3853 | dot = true; |
e724b063 LP |
3854 | } else if (hostname_valid_char(*p)) { |
3855 | *(d++) = lowercase ? tolower(*p) : *p; | |
cec4ead9 | 3856 | dot = false; |
e724b063 | 3857 | } |
cec4ead9 | 3858 | |
cec4ead9 | 3859 | } |
9beb3f4d | 3860 | |
e724b063 LP |
3861 | if (dot && d > s) |
3862 | d[-1] = 0; | |
3863 | else | |
3864 | *d = 0; | |
3865 | ||
9beb3f4d | 3866 | strshorten(s, HOST_NAME_MAX); |
cec4ead9 | 3867 | |
9beb3f4d LP |
3868 | return s; |
3869 | } | |
3870 | ||
1325aa42 | 3871 | int pipe_eof(int fd) { |
1325aa42 | 3872 | int r; |
b92bea5d ZJS |
3873 | struct pollfd pollfd = { |
3874 | .fd = fd, | |
3875 | .events = POLLIN|POLLHUP, | |
3876 | }; | |
1325aa42 LP |
3877 | |
3878 | r = poll(&pollfd, 1, 0); | |
3879 | if (r < 0) | |
3880 | return -errno; | |
3881 | ||
3882 | if (r == 0) | |
3883 | return 0; | |
3884 | ||
3885 | return pollfd.revents & POLLHUP; | |
3886 | } | |
3887 | ||
8f2d43a0 | 3888 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b | 3889 | int r; |
b92bea5d ZJS |
3890 | struct pollfd pollfd = { |
3891 | .fd = fd, | |
3892 | .events = event, | |
3893 | }; | |
df50185b | 3894 | |
8f2d43a0 | 3895 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
3896 | if (r < 0) |
3897 | return -errno; | |
3898 | ||
3899 | if (r == 0) | |
3900 | return 0; | |
3901 | ||
3902 | return pollfd.revents; | |
3903 | } | |
3904 | ||
5a3ab509 LP |
3905 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
3906 | FILE *f; | |
3907 | char *t; | |
3908 | const char *fn; | |
3909 | size_t k; | |
3910 | int fd; | |
3911 | ||
3912 | assert(path); | |
3913 | assert(_f); | |
3914 | assert(_temp_path); | |
3915 | ||
3916 | t = new(char, strlen(path) + 1 + 6 + 1); | |
3917 | if (!t) | |
3918 | return -ENOMEM; | |
3919 | ||
9eb977db | 3920 | fn = path_get_file_name(path); |
5a3ab509 LP |
3921 | k = fn-path; |
3922 | memcpy(t, path, k); | |
3923 | t[k] = '.'; | |
3924 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
3925 | ||
3926 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
3927 | if (fd < 0) { | |
3928 | free(t); | |
3929 | return -errno; | |
3930 | } | |
3931 | ||
3932 | f = fdopen(fd, "we"); | |
3933 | if (!f) { | |
3934 | unlink(t); | |
3935 | free(t); | |
3936 | return -errno; | |
3937 | } | |
3938 | ||
3939 | *_f = f; | |
3940 | *_temp_path = t; | |
3941 | ||
3942 | return 0; | |
3943 | } | |
3944 | ||
6ea832a2 | 3945 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
3946 | assert(fd >= 0); |
3947 | ||
6ea832a2 LP |
3948 | if (ioctl(fd, TIOCVHANGUP) < 0) |
3949 | return -errno; | |
3950 | ||
3951 | return 0; | |
3952 | } | |
3953 | ||
3954 | int terminal_vhangup(const char *name) { | |
3955 | int fd, r; | |
3956 | ||
3957 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
3958 | if (fd < 0) | |
3959 | return fd; | |
3960 | ||
3961 | r = terminal_vhangup_fd(fd); | |
3962 | close_nointr_nofail(fd); | |
3963 | ||
3964 | return r; | |
3965 | } | |
3966 | ||
3967 | int vt_disallocate(const char *name) { | |
3968 | int fd, r; | |
3969 | unsigned u; | |
6ea832a2 LP |
3970 | |
3971 | /* Deallocate the VT if possible. If not possible | |
3972 | * (i.e. because it is the active one), at least clear it | |
3973 | * entirely (including the scrollback buffer) */ | |
3974 | ||
b83bc4e9 LP |
3975 | if (!startswith(name, "/dev/")) |
3976 | return -EINVAL; | |
3977 | ||
3978 | if (!tty_is_vc(name)) { | |
3979 | /* So this is not a VT. I guess we cannot deallocate | |
3980 | * it then. But let's at least clear the screen */ | |
3981 | ||
3982 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
3983 | if (fd < 0) | |
3984 | return fd; | |
3985 | ||
8585357a LP |
3986 | loop_write(fd, |
3987 | "\033[r" /* clear scrolling region */ | |
3988 | "\033[H" /* move home */ | |
3989 | "\033[2J", /* clear screen */ | |
3990 | 10, false); | |
b83bc4e9 LP |
3991 | close_nointr_nofail(fd); |
3992 | ||
3993 | return 0; | |
3994 | } | |
6ea832a2 LP |
3995 | |
3996 | if (!startswith(name, "/dev/tty")) | |
3997 | return -EINVAL; | |
3998 | ||
3999 | r = safe_atou(name+8, &u); | |
4000 | if (r < 0) | |
4001 | return r; | |
4002 | ||
4003 | if (u <= 0) | |
b83bc4e9 | 4004 | return -EINVAL; |
6ea832a2 | 4005 | |
b83bc4e9 | 4006 | /* Try to deallocate */ |
6ea832a2 LP |
4007 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4008 | if (fd < 0) | |
4009 | return fd; | |
4010 | ||
4011 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4012 | close_nointr_nofail(fd); |
6ea832a2 | 4013 | |
b83bc4e9 LP |
4014 | if (r >= 0) |
4015 | return 0; | |
6ea832a2 | 4016 | |
b83bc4e9 | 4017 | if (errno != EBUSY) |
6ea832a2 | 4018 | return -errno; |
6ea832a2 | 4019 | |
b83bc4e9 LP |
4020 | /* Couldn't deallocate, so let's clear it fully with |
4021 | * scrollback */ | |
4022 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4023 | if (fd < 0) |
b83bc4e9 | 4024 | return fd; |
6ea832a2 | 4025 | |
8585357a LP |
4026 | loop_write(fd, |
4027 | "\033[r" /* clear scrolling region */ | |
4028 | "\033[H" /* move home */ | |
4029 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4030 | 10, false); | |
b83bc4e9 | 4031 | close_nointr_nofail(fd); |
6ea832a2 | 4032 | |
b83bc4e9 | 4033 | return 0; |
6ea832a2 LP |
4034 | } |
4035 | ||
34ca941c LP |
4036 | int copy_file(const char *from, const char *to) { |
4037 | int r, fdf, fdt; | |
4038 | ||
4039 | assert(from); | |
4040 | assert(to); | |
4041 | ||
4042 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4043 | if (fdf < 0) | |
4044 | return -errno; | |
4045 | ||
4046 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
4047 | if (fdt < 0) { | |
4048 | close_nointr_nofail(fdf); | |
4049 | return -errno; | |
4050 | } | |
4051 | ||
4052 | for (;;) { | |
4053 | char buf[PIPE_BUF]; | |
4054 | ssize_t n, k; | |
4055 | ||
4056 | n = read(fdf, buf, sizeof(buf)); | |
4057 | if (n < 0) { | |
4058 | r = -errno; | |
4059 | ||
4060 | close_nointr_nofail(fdf); | |
4061 | close_nointr(fdt); | |
4062 | unlink(to); | |
4063 | ||
4064 | return r; | |
4065 | } | |
4066 | ||
4067 | if (n == 0) | |
4068 | break; | |
4069 | ||
4070 | errno = 0; | |
4071 | k = loop_write(fdt, buf, n, false); | |
4072 | if (n != k) { | |
4073 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4074 | ||
4075 | close_nointr_nofail(fdf); | |
4076 | close_nointr(fdt); | |
4077 | ||
4078 | unlink(to); | |
4079 | return r; | |
4080 | } | |
4081 | } | |
4082 | ||
4083 | close_nointr_nofail(fdf); | |
4084 | r = close_nointr(fdt); | |
4085 | ||
4086 | if (r < 0) { | |
4087 | unlink(to); | |
4088 | return r; | |
4089 | } | |
4090 | ||
4091 | return 0; | |
4092 | } | |
4093 | ||
424a19f8 LP |
4094 | int symlink_atomic(const char *from, const char *to) { |
4095 | char *x; | |
4096 | _cleanup_free_ char *t; | |
34ca941c LP |
4097 | const char *fn; |
4098 | size_t k; | |
4099 | unsigned long long ull; | |
4100 | unsigned i; | |
4101 | int r; | |
4102 | ||
4103 | assert(from); | |
4104 | assert(to); | |
4105 | ||
4106 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4107 | if (!t) | |
4108 | return -ENOMEM; | |
4109 | ||
9eb977db | 4110 | fn = path_get_file_name(to); |
34ca941c LP |
4111 | k = fn-to; |
4112 | memcpy(t, to, k); | |
4113 | t[k] = '.'; | |
4114 | x = stpcpy(t+k+1, fn); | |
4115 | ||
4116 | ull = random_ull(); | |
4117 | for (i = 0; i < 16; i++) { | |
4118 | *(x++) = hexchar(ull & 0xF); | |
4119 | ull >>= 4; | |
4120 | } | |
4121 | ||
4122 | *x = 0; | |
4123 | ||
424a19f8 LP |
4124 | if (symlink(from, t) < 0) |
4125 | return -errno; | |
34ca941c LP |
4126 | |
4127 | if (rename(t, to) < 0) { | |
4128 | r = -errno; | |
4129 | unlink(t); | |
34ca941c LP |
4130 | return r; |
4131 | } | |
4132 | ||
424a19f8 | 4133 | return 0; |
34ca941c LP |
4134 | } |
4135 | ||
4d6d6518 LP |
4136 | bool display_is_local(const char *display) { |
4137 | assert(display); | |
4138 | ||
4139 | return | |
4140 | display[0] == ':' && | |
4141 | display[1] >= '0' && | |
4142 | display[1] <= '9'; | |
4143 | } | |
4144 | ||
4145 | int socket_from_display(const char *display, char **path) { | |
4146 | size_t k; | |
4147 | char *f, *c; | |
4148 | ||
4149 | assert(display); | |
4150 | assert(path); | |
4151 | ||
4152 | if (!display_is_local(display)) | |
4153 | return -EINVAL; | |
4154 | ||
4155 | k = strspn(display+1, "0123456789"); | |
4156 | ||
4157 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4158 | if (!f) | |
4159 | return -ENOMEM; | |
4160 | ||
4161 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4162 | memcpy(c, display+1, k); | |
4163 | c[k] = 0; | |
4164 | ||
4165 | *path = f; | |
4166 | ||
4167 | return 0; | |
4168 | } | |
4169 | ||
d05c5031 LP |
4170 | int get_user_creds( |
4171 | const char **username, | |
4172 | uid_t *uid, gid_t *gid, | |
4173 | const char **home, | |
4174 | const char **shell) { | |
4175 | ||
1cccf435 | 4176 | struct passwd *p; |
ddd88763 | 4177 | uid_t u; |
1cccf435 MV |
4178 | |
4179 | assert(username); | |
4180 | assert(*username); | |
1cccf435 MV |
4181 | |
4182 | /* We enforce some special rules for uid=0: in order to avoid | |
4183 | * NSS lookups for root we hardcode its data. */ | |
4184 | ||
4185 | if (streq(*username, "root") || streq(*username, "0")) { | |
4186 | *username = "root"; | |
4b67834e LP |
4187 | |
4188 | if (uid) | |
4189 | *uid = 0; | |
4190 | ||
4191 | if (gid) | |
4192 | *gid = 0; | |
4193 | ||
4194 | if (home) | |
4195 | *home = "/root"; | |
d05c5031 LP |
4196 | |
4197 | if (shell) | |
4198 | *shell = "/bin/sh"; | |
4199 | ||
1cccf435 MV |
4200 | return 0; |
4201 | } | |
4202 | ||
ddd88763 | 4203 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4204 | errno = 0; |
ddd88763 | 4205 | p = getpwuid(u); |
1cccf435 MV |
4206 | |
4207 | /* If there are multiple users with the same id, make | |
4208 | * sure to leave $USER to the configured value instead | |
4209 | * of the first occurrence in the database. However if | |
4210 | * the uid was configured by a numeric uid, then let's | |
4211 | * pick the real username from /etc/passwd. */ | |
4212 | if (p) | |
4213 | *username = p->pw_name; | |
4214 | } else { | |
4215 | errno = 0; | |
4216 | p = getpwnam(*username); | |
4217 | } | |
4218 | ||
4219 | if (!p) | |
8333c77e | 4220 | return errno > 0 ? -errno : -ESRCH; |
1cccf435 | 4221 | |
4b67834e LP |
4222 | if (uid) |
4223 | *uid = p->pw_uid; | |
4224 | ||
4225 | if (gid) | |
4226 | *gid = p->pw_gid; | |
4227 | ||
4228 | if (home) | |
4229 | *home = p->pw_dir; | |
4230 | ||
d05c5031 LP |
4231 | if (shell) |
4232 | *shell = p->pw_shell; | |
4233 | ||
4b67834e LP |
4234 | return 0; |
4235 | } | |
4236 | ||
59164be4 LP |
4237 | char* uid_to_name(uid_t uid) { |
4238 | struct passwd *p; | |
4239 | char *r; | |
4240 | ||
4241 | if (uid == 0) | |
4242 | return strdup("root"); | |
4243 | ||
4244 | p = getpwuid(uid); | |
4245 | if (p) | |
4246 | return strdup(p->pw_name); | |
4247 | ||
4248 | if (asprintf(&r, "%lu", (unsigned long) uid) < 0) | |
4249 | return NULL; | |
4250 | ||
4251 | return r; | |
4252 | } | |
4253 | ||
4468addc LP |
4254 | char* gid_to_name(gid_t gid) { |
4255 | struct group *p; | |
4256 | char *r; | |
4257 | ||
4258 | if (gid == 0) | |
4259 | return strdup("root"); | |
4260 | ||
4261 | p = getgrgid(gid); | |
4262 | if (p) | |
4263 | return strdup(p->gr_name); | |
4264 | ||
4265 | if (asprintf(&r, "%lu", (unsigned long) gid) < 0) | |
4266 | return NULL; | |
4267 | ||
4268 | return r; | |
4269 | } | |
4270 | ||
4b67834e LP |
4271 | int get_group_creds(const char **groupname, gid_t *gid) { |
4272 | struct group *g; | |
4273 | gid_t id; | |
4274 | ||
4275 | assert(groupname); | |
4276 | ||
4277 | /* We enforce some special rules for gid=0: in order to avoid | |
4278 | * NSS lookups for root we hardcode its data. */ | |
4279 | ||
4280 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4281 | *groupname = "root"; | |
4282 | ||
4283 | if (gid) | |
4284 | *gid = 0; | |
4285 | ||
4286 | return 0; | |
4287 | } | |
4288 | ||
4289 | if (parse_gid(*groupname, &id) >= 0) { | |
4290 | errno = 0; | |
4291 | g = getgrgid(id); | |
4292 | ||
4293 | if (g) | |
4294 | *groupname = g->gr_name; | |
4295 | } else { | |
4296 | errno = 0; | |
4297 | g = getgrnam(*groupname); | |
4298 | } | |
4299 | ||
4300 | if (!g) | |
8333c77e | 4301 | return errno > 0 ? -errno : -ESRCH; |
4b67834e LP |
4302 | |
4303 | if (gid) | |
4304 | *gid = g->gr_gid; | |
4305 | ||
1cccf435 MV |
4306 | return 0; |
4307 | } | |
4308 | ||
4468addc LP |
4309 | int in_gid(gid_t gid) { |
4310 | gid_t *gids; | |
43673799 LP |
4311 | int ngroups_max, r, i; |
4312 | ||
43673799 LP |
4313 | if (getgid() == gid) |
4314 | return 1; | |
4315 | ||
4316 | if (getegid() == gid) | |
4317 | return 1; | |
4318 | ||
4319 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4320 | assert(ngroups_max > 0); | |
4321 | ||
4322 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4323 | ||
4324 | r = getgroups(ngroups_max, gids); | |
4325 | if (r < 0) | |
4326 | return -errno; | |
4327 | ||
4328 | for (i = 0; i < r; i++) | |
4329 | if (gids[i] == gid) | |
4330 | return 1; | |
4331 | ||
4332 | return 0; | |
4333 | } | |
4334 | ||
4468addc LP |
4335 | int in_group(const char *name) { |
4336 | int r; | |
4337 | gid_t gid; | |
4338 | ||
4339 | r = get_group_creds(&name, &gid); | |
4340 | if (r < 0) | |
4341 | return r; | |
4342 | ||
4343 | return in_gid(gid); | |
4344 | } | |
4345 | ||
8092a428 | 4346 | int glob_exists(const char *path) { |
7fd1b19b | 4347 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 4348 | int k; |
8092a428 LP |
4349 | |
4350 | assert(path); | |
4351 | ||
8092a428 LP |
4352 | errno = 0; |
4353 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4354 | ||
4355 | if (k == GLOB_NOMATCH) | |
8d98da3f | 4356 | return 0; |
8092a428 | 4357 | else if (k == GLOB_NOSPACE) |
8d98da3f | 4358 | return -ENOMEM; |
8092a428 | 4359 | else if (k == 0) |
8d98da3f | 4360 | return !strv_isempty(g.gl_pathv); |
8092a428 | 4361 | else |
8d98da3f ZJS |
4362 | return errno ? -errno : -EIO; |
4363 | } | |
8092a428 | 4364 | |
8d98da3f ZJS |
4365 | int glob_extend(char ***strv, const char *path) { |
4366 | _cleanup_globfree_ glob_t g = {}; | |
4367 | int k; | |
4368 | char **p; | |
4369 | ||
4370 | errno = 0; | |
4371 | k = glob(optarg, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4372 | ||
4373 | if (k == GLOB_NOMATCH) | |
4374 | return -ENOENT; | |
4375 | else if (k == GLOB_NOSPACE) | |
4376 | return -ENOMEM; | |
4377 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
4378 | return errno ? -errno : -EIO; | |
4379 | ||
4380 | STRV_FOREACH(p, g.gl_pathv) { | |
4381 | k = strv_extend(strv, *p); | |
4382 | if (k < 0) | |
4383 | break; | |
4384 | } | |
4385 | ||
4386 | return k; | |
8092a428 LP |
4387 | } |
4388 | ||
83096483 LP |
4389 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4390 | struct stat st; | |
4391 | ||
4392 | assert(d); | |
4393 | assert(de); | |
4394 | ||
4395 | if (de->d_type != DT_UNKNOWN) | |
4396 | return 0; | |
4397 | ||
4398 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4399 | return -errno; | |
4400 | ||
4401 | de->d_type = | |
4402 | S_ISREG(st.st_mode) ? DT_REG : | |
4403 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4404 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4405 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4406 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4407 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4408 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4409 | DT_UNKNOWN; | |
4410 | ||
4411 | return 0; | |
4412 | } | |
4413 | ||
4414 | int in_search_path(const char *path, char **search) { | |
4415 | char **i, *parent; | |
4416 | int r; | |
4417 | ||
9eb977db | 4418 | r = path_get_parent(path, &parent); |
83096483 LP |
4419 | if (r < 0) |
4420 | return r; | |
4421 | ||
4422 | r = 0; | |
4423 | ||
4424 | STRV_FOREACH(i, search) { | |
4425 | if (path_equal(parent, *i)) { | |
4426 | r = 1; | |
4427 | break; | |
4428 | } | |
4429 | } | |
4430 | ||
4431 | free(parent); | |
4432 | ||
4433 | return r; | |
4434 | } | |
4435 | ||
034a2a52 LP |
4436 | int get_files_in_directory(const char *path, char ***list) { |
4437 | DIR *d; | |
4438 | int r = 0; | |
4439 | unsigned n = 0; | |
4440 | char **l = NULL; | |
4441 | ||
4442 | assert(path); | |
d60ef526 LP |
4443 | |
4444 | /* Returns all files in a directory in *list, and the number | |
4445 | * of files as return value. If list is NULL returns only the | |
4446 | * number */ | |
034a2a52 LP |
4447 | |
4448 | d = opendir(path); | |
8ea913b2 LP |
4449 | if (!d) |
4450 | return -errno; | |
4451 | ||
034a2a52 | 4452 | for (;;) { |
7d5e9c0f LP |
4453 | struct dirent *de; |
4454 | union dirent_storage buf; | |
034a2a52 LP |
4455 | int k; |
4456 | ||
7d5e9c0f | 4457 | k = readdir_r(d, &buf.de, &de); |
034a2a52 LP |
4458 | if (k != 0) { |
4459 | r = -k; | |
4460 | goto finish; | |
4461 | } | |
4462 | ||
4463 | if (!de) | |
4464 | break; | |
4465 | ||
4466 | dirent_ensure_type(d, de); | |
4467 | ||
4468 | if (!dirent_is_file(de)) | |
4469 | continue; | |
4470 | ||
d60ef526 LP |
4471 | if (list) { |
4472 | if ((unsigned) r >= n) { | |
4473 | char **t; | |
034a2a52 | 4474 | |
d60ef526 LP |
4475 | n = MAX(16, 2*r); |
4476 | t = realloc(l, sizeof(char*) * n); | |
4477 | if (!t) { | |
4478 | r = -ENOMEM; | |
4479 | goto finish; | |
4480 | } | |
034a2a52 | 4481 | |
d60ef526 LP |
4482 | l = t; |
4483 | } | |
034a2a52 | 4484 | |
d60ef526 | 4485 | assert((unsigned) r < n); |
034a2a52 | 4486 | |
d60ef526 LP |
4487 | l[r] = strdup(de->d_name); |
4488 | if (!l[r]) { | |
4489 | r = -ENOMEM; | |
4490 | goto finish; | |
4491 | } | |
034a2a52 | 4492 | |
d60ef526 LP |
4493 | l[++r] = NULL; |
4494 | } else | |
4495 | r++; | |
034a2a52 LP |
4496 | } |
4497 | ||
4498 | finish: | |
4499 | if (d) | |
4500 | closedir(d); | |
4501 | ||
d60ef526 LP |
4502 | if (r >= 0) { |
4503 | if (list) | |
4504 | *list = l; | |
4505 | } else | |
034a2a52 LP |
4506 | strv_free(l); |
4507 | ||
4508 | return r; | |
4509 | } | |
4510 | ||
b7def684 | 4511 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4512 | va_list ap; |
4513 | size_t l; | |
4514 | char *r, *p; | |
4515 | ||
4516 | va_start(ap, x); | |
4517 | ||
4518 | if (x) { | |
4519 | l = strlen(x); | |
4520 | ||
4521 | for (;;) { | |
4522 | const char *t; | |
040f18ea | 4523 | size_t n; |
911a4828 LP |
4524 | |
4525 | t = va_arg(ap, const char *); | |
4526 | if (!t) | |
4527 | break; | |
4528 | ||
040f18ea | 4529 | n = strlen(t); |
e98055de LN |
4530 | if (n > ((size_t) -1) - l) { |
4531 | va_end(ap); | |
040f18ea | 4532 | return NULL; |
e98055de | 4533 | } |
040f18ea LP |
4534 | |
4535 | l += n; | |
911a4828 LP |
4536 | } |
4537 | } else | |
4538 | l = 0; | |
4539 | ||
4540 | va_end(ap); | |
4541 | ||
4542 | r = new(char, l+1); | |
4543 | if (!r) | |
4544 | return NULL; | |
4545 | ||
4546 | if (x) { | |
4547 | p = stpcpy(r, x); | |
4548 | ||
4549 | va_start(ap, x); | |
4550 | ||
4551 | for (;;) { | |
4552 | const char *t; | |
4553 | ||
4554 | t = va_arg(ap, const char *); | |
4555 | if (!t) | |
4556 | break; | |
4557 | ||
4558 | p = stpcpy(p, t); | |
4559 | } | |
8ea913b2 LP |
4560 | |
4561 | va_end(ap); | |
911a4828 LP |
4562 | } else |
4563 | r[0] = 0; | |
4564 | ||
4565 | return r; | |
4566 | } | |
4567 | ||
b636465b LP |
4568 | bool is_main_thread(void) { |
4569 | static __thread int cached = 0; | |
4570 | ||
4571 | if (_unlikely_(cached == 0)) | |
4572 | cached = getpid() == gettid() ? 1 : -1; | |
4573 | ||
4574 | return cached > 0; | |
4575 | } | |
4576 | ||
94959f0f LP |
4577 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4578 | char *p, *s; | |
4579 | int r; | |
4580 | unsigned n, m; | |
4581 | ||
4582 | assert(ret); | |
4583 | ||
4584 | /* If it has a queue this is good enough for us */ | |
4585 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4586 | return -ENOMEM; | |
4587 | ||
4588 | r = access(p, F_OK); | |
4589 | free(p); | |
4590 | ||
4591 | if (r >= 0) { | |
4592 | *ret = d; | |
4593 | return 0; | |
4594 | } | |
4595 | ||
4596 | /* If it is a partition find the originating device */ | |
4597 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4598 | return -ENOMEM; | |
4599 | ||
4600 | r = access(p, F_OK); | |
4601 | free(p); | |
4602 | ||
4603 | if (r < 0) | |
4604 | return -ENOENT; | |
4605 | ||
4606 | /* Get parent dev_t */ | |
4607 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4608 | return -ENOMEM; | |
4609 | ||
4610 | r = read_one_line_file(p, &s); | |
4611 | free(p); | |
4612 | ||
4613 | if (r < 0) | |
4614 | return r; | |
4615 | ||
4616 | r = sscanf(s, "%u:%u", &m, &n); | |
4617 | free(s); | |
4618 | ||
4619 | if (r != 2) | |
4620 | return -EINVAL; | |
4621 | ||
4622 | /* Only return this if it is really good enough for us. */ | |
4623 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4624 | return -ENOMEM; | |
4625 | ||
4626 | r = access(p, F_OK); | |
4627 | free(p); | |
4628 | ||
4629 | if (r >= 0) { | |
4630 | *ret = makedev(m, n); | |
4631 | return 0; | |
4632 | } | |
4633 | ||
4634 | return -ENOENT; | |
4635 | } | |
4636 | ||
8d53b453 | 4637 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4638 | struct stat st; |
4639 | ||
4640 | assert(p); | |
4641 | ||
4642 | if (lstat(p, &st) < 0) | |
4643 | return -errno; | |
4644 | ||
4645 | return | |
8d53b453 | 4646 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4647 | (st.st_mode & S_ISVTX); |
4648 | } | |
94959f0f | 4649 | |
f41607a6 LP |
4650 | static const char *const ioprio_class_table[] = { |
4651 | [IOPRIO_CLASS_NONE] = "none", | |
4652 | [IOPRIO_CLASS_RT] = "realtime", | |
4653 | [IOPRIO_CLASS_BE] = "best-effort", | |
4654 | [IOPRIO_CLASS_IDLE] = "idle" | |
4655 | }; | |
4656 | ||
f8b69d1d | 4657 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4658 | |
4659 | static const char *const sigchld_code_table[] = { | |
4660 | [CLD_EXITED] = "exited", | |
4661 | [CLD_KILLED] = "killed", | |
4662 | [CLD_DUMPED] = "dumped", | |
4663 | [CLD_TRAPPED] = "trapped", | |
4664 | [CLD_STOPPED] = "stopped", | |
4665 | [CLD_CONTINUED] = "continued", | |
4666 | }; | |
4667 | ||
4668 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4669 | ||
4670 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4671 | [LOG_FAC(LOG_KERN)] = "kern", | |
4672 | [LOG_FAC(LOG_USER)] = "user", | |
4673 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4674 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4675 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4676 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4677 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4678 | [LOG_FAC(LOG_NEWS)] = "news", | |
4679 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4680 | [LOG_FAC(LOG_CRON)] = "cron", | |
4681 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4682 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4683 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4684 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4685 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4686 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4687 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4688 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4689 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4690 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4691 | }; | |
4692 | ||
f8b69d1d | 4693 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4694 | |
4695 | static const char *const log_level_table[] = { | |
4696 | [LOG_EMERG] = "emerg", | |
4697 | [LOG_ALERT] = "alert", | |
4698 | [LOG_CRIT] = "crit", | |
4699 | [LOG_ERR] = "err", | |
4700 | [LOG_WARNING] = "warning", | |
4701 | [LOG_NOTICE] = "notice", | |
4702 | [LOG_INFO] = "info", | |
4703 | [LOG_DEBUG] = "debug" | |
4704 | }; | |
4705 | ||
f8b69d1d | 4706 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4707 | |
4708 | static const char* const sched_policy_table[] = { | |
4709 | [SCHED_OTHER] = "other", | |
4710 | [SCHED_BATCH] = "batch", | |
4711 | [SCHED_IDLE] = "idle", | |
4712 | [SCHED_FIFO] = "fifo", | |
4713 | [SCHED_RR] = "rr" | |
4714 | }; | |
4715 | ||
f8b69d1d | 4716 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 LP |
4717 | |
4718 | static const char* const rlimit_table[] = { | |
4719 | [RLIMIT_CPU] = "LimitCPU", | |
4720 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4721 | [RLIMIT_DATA] = "LimitDATA", | |
4722 | [RLIMIT_STACK] = "LimitSTACK", | |
4723 | [RLIMIT_CORE] = "LimitCORE", | |
4724 | [RLIMIT_RSS] = "LimitRSS", | |
4725 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4726 | [RLIMIT_AS] = "LimitAS", | |
4727 | [RLIMIT_NPROC] = "LimitNPROC", | |
4728 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4729 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4730 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4731 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4732 | [RLIMIT_NICE] = "LimitNICE", | |
4733 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4734 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4735 | }; | |
4736 | ||
4737 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4738 | ||
4739 | static const char* const ip_tos_table[] = { | |
4740 | [IPTOS_LOWDELAY] = "low-delay", | |
4741 | [IPTOS_THROUGHPUT] = "throughput", | |
4742 | [IPTOS_RELIABILITY] = "reliability", | |
4743 | [IPTOS_LOWCOST] = "low-cost", | |
4744 | }; | |
4745 | ||
f8b69d1d | 4746 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4747 | |
4e240ab0 | 4748 | static const char *const __signal_table[] = { |
f41607a6 LP |
4749 | [SIGHUP] = "HUP", |
4750 | [SIGINT] = "INT", | |
4751 | [SIGQUIT] = "QUIT", | |
4752 | [SIGILL] = "ILL", | |
4753 | [SIGTRAP] = "TRAP", | |
4754 | [SIGABRT] = "ABRT", | |
4755 | [SIGBUS] = "BUS", | |
4756 | [SIGFPE] = "FPE", | |
4757 | [SIGKILL] = "KILL", | |
4758 | [SIGUSR1] = "USR1", | |
4759 | [SIGSEGV] = "SEGV", | |
4760 | [SIGUSR2] = "USR2", | |
4761 | [SIGPIPE] = "PIPE", | |
4762 | [SIGALRM] = "ALRM", | |
4763 | [SIGTERM] = "TERM", | |
4764 | #ifdef SIGSTKFLT | |
4765 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4766 | #endif | |
4767 | [SIGCHLD] = "CHLD", | |
4768 | [SIGCONT] = "CONT", | |
4769 | [SIGSTOP] = "STOP", | |
4770 | [SIGTSTP] = "TSTP", | |
4771 | [SIGTTIN] = "TTIN", | |
4772 | [SIGTTOU] = "TTOU", | |
4773 | [SIGURG] = "URG", | |
4774 | [SIGXCPU] = "XCPU", | |
4775 | [SIGXFSZ] = "XFSZ", | |
4776 | [SIGVTALRM] = "VTALRM", | |
4777 | [SIGPROF] = "PROF", | |
4778 | [SIGWINCH] = "WINCH", | |
4779 | [SIGIO] = "IO", | |
4780 | [SIGPWR] = "PWR", | |
4781 | [SIGSYS] = "SYS" | |
4782 | }; | |
4783 | ||
4e240ab0 MS |
4784 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4785 | ||
4786 | const char *signal_to_string(int signo) { | |
fa70beaa | 4787 | static __thread char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1]; |
4e240ab0 MS |
4788 | const char *name; |
4789 | ||
4790 | name = __signal_to_string(signo); | |
4791 | if (name) | |
4792 | return name; | |
4793 | ||
4794 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
fa70beaa | 4795 | snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN); |
4e240ab0 | 4796 | else |
fa70beaa LP |
4797 | snprintf(buf, sizeof(buf), "%d", signo); |
4798 | ||
4e240ab0 MS |
4799 | return buf; |
4800 | } | |
4801 | ||
4802 | int signal_from_string(const char *s) { | |
4803 | int signo; | |
4804 | int offset = 0; | |
4805 | unsigned u; | |
4806 | ||
040f18ea | 4807 | signo = __signal_from_string(s); |
4e240ab0 MS |
4808 | if (signo > 0) |
4809 | return signo; | |
4810 | ||
4811 | if (startswith(s, "RTMIN+")) { | |
4812 | s += 6; | |
4813 | offset = SIGRTMIN; | |
4814 | } | |
4815 | if (safe_atou(s, &u) >= 0) { | |
4816 | signo = (int) u + offset; | |
4817 | if (signo > 0 && signo < _NSIG) | |
4818 | return signo; | |
4819 | } | |
4820 | return -1; | |
4821 | } | |
65457142 FC |
4822 | |
4823 | bool kexec_loaded(void) { | |
4824 | bool loaded = false; | |
4825 | char *s; | |
4826 | ||
4827 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
4828 | if (s[0] == '1') | |
4829 | loaded = true; | |
4830 | free(s); | |
4831 | } | |
4832 | return loaded; | |
4833 | } | |
fb9de93d LP |
4834 | |
4835 | int strdup_or_null(const char *a, char **b) { | |
4836 | char *c; | |
4837 | ||
4838 | assert(b); | |
4839 | ||
4840 | if (!a) { | |
4841 | *b = NULL; | |
4842 | return 0; | |
4843 | } | |
4844 | ||
4845 | c = strdup(a); | |
4846 | if (!c) | |
4847 | return -ENOMEM; | |
4848 | ||
4849 | *b = c; | |
4850 | return 0; | |
4851 | } | |
64685e0c | 4852 | |
87d2c1ff LP |
4853 | int prot_from_flags(int flags) { |
4854 | ||
4855 | switch (flags & O_ACCMODE) { | |
4856 | ||
4857 | case O_RDONLY: | |
4858 | return PROT_READ; | |
4859 | ||
4860 | case O_WRONLY: | |
4861 | return PROT_WRITE; | |
4862 | ||
4863 | case O_RDWR: | |
4864 | return PROT_READ|PROT_WRITE; | |
4865 | ||
4866 | default: | |
4867 | return -EINVAL; | |
4868 | } | |
7c99e0c1 | 4869 | } |
689b9a22 | 4870 | |
babfc091 | 4871 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 4872 | unsigned i; |
babfc091 LP |
4873 | |
4874 | static const struct { | |
4875 | const char *suffix; | |
4876 | off_t factor; | |
4877 | } table[] = { | |
32895bb3 LP |
4878 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
4879 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
4880 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
4881 | { "G", 1024ULL*1024ULL*1024ULL }, | |
4882 | { "M", 1024ULL*1024ULL }, | |
4883 | { "K", 1024ULL }, | |
4884 | }; | |
4885 | ||
4886 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
4887 | ||
4888 | if (t >= table[i].factor) { | |
4889 | snprintf(buf, l, | |
4890 | "%llu.%llu%s", | |
4891 | (unsigned long long) (t / table[i].factor), | |
4892 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
4893 | table[i].suffix); | |
4894 | ||
4895 | goto finish; | |
4896 | } | |
4897 | } | |
4898 | ||
4899 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
4900 | ||
4901 | finish: | |
4902 | buf[l-1] = 0; | |
4903 | return buf; | |
4904 | ||
4905 | } | |
55d7bfc1 LP |
4906 | |
4907 | void* memdup(const void *p, size_t l) { | |
4908 | void *r; | |
4909 | ||
4910 | assert(p); | |
4911 | ||
4912 | r = malloc(l); | |
4913 | if (!r) | |
4914 | return NULL; | |
4915 | ||
4916 | memcpy(r, p, l); | |
4917 | return r; | |
4918 | } | |
bb99a35a LP |
4919 | |
4920 | int fd_inc_sndbuf(int fd, size_t n) { | |
4921 | int r, value; | |
4922 | socklen_t l = sizeof(value); | |
4923 | ||
4924 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
4925 | if (r >= 0 && | |
4926 | l == sizeof(value) && | |
4927 | (size_t) value >= n*2) | |
4928 | return 0; | |
4929 | ||
4930 | value = (int) n; | |
4931 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
4932 | if (r < 0) | |
4933 | return -errno; | |
4934 | ||
4935 | return 1; | |
4936 | } | |
4937 | ||
4938 | int fd_inc_rcvbuf(int fd, size_t n) { | |
4939 | int r, value; | |
4940 | socklen_t l = sizeof(value); | |
4941 | ||
4942 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
4943 | if (r >= 0 && | |
4944 | l == sizeof(value) && | |
4945 | (size_t) value >= n*2) | |
4946 | return 0; | |
4947 | ||
4948 | value = (int) n; | |
4949 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
4950 | if (r < 0) | |
4951 | return -errno; | |
4952 | ||
4953 | return 1; | |
4954 | } | |
6bb92a16 | 4955 | |
9bdc770c | 4956 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
4957 | pid_t parent_pid, agent_pid; |
4958 | int fd; | |
4959 | bool stdout_is_tty, stderr_is_tty; | |
4960 | unsigned n, i; | |
4961 | va_list ap; | |
4962 | char **l; | |
4963 | ||
4964 | assert(pid); | |
4965 | assert(path); | |
4966 | ||
4967 | parent_pid = getpid(); | |
4968 | ||
4969 | /* Spawns a temporary TTY agent, making sure it goes away when | |
4970 | * we go away */ | |
4971 | ||
4972 | agent_pid = fork(); | |
4973 | if (agent_pid < 0) | |
4974 | return -errno; | |
4975 | ||
4976 | if (agent_pid != 0) { | |
4977 | *pid = agent_pid; | |
4978 | return 0; | |
4979 | } | |
4980 | ||
4981 | /* In the child: | |
4982 | * | |
4983 | * Make sure the agent goes away when the parent dies */ | |
4984 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
4985 | _exit(EXIT_FAILURE); | |
4986 | ||
4987 | /* Check whether our parent died before we were able | |
4988 | * to set the death signal */ | |
4989 | if (getppid() != parent_pid) | |
4990 | _exit(EXIT_SUCCESS); | |
4991 | ||
4992 | /* Don't leak fds to the agent */ | |
9bdc770c | 4993 | close_all_fds(except, n_except); |
6bb92a16 LP |
4994 | |
4995 | stdout_is_tty = isatty(STDOUT_FILENO); | |
4996 | stderr_is_tty = isatty(STDERR_FILENO); | |
4997 | ||
4998 | if (!stdout_is_tty || !stderr_is_tty) { | |
4999 | /* Detach from stdout/stderr. and reopen | |
5000 | * /dev/tty for them. This is important to | |
5001 | * ensure that when systemctl is started via | |
5002 | * popen() or a similar call that expects to | |
5003 | * read EOF we actually do generate EOF and | |
5004 | * not delay this indefinitely by because we | |
5005 | * keep an unused copy of stdin around. */ | |
5006 | fd = open("/dev/tty", O_WRONLY); | |
5007 | if (fd < 0) { | |
5008 | log_error("Failed to open /dev/tty: %m"); | |
5009 | _exit(EXIT_FAILURE); | |
5010 | } | |
5011 | ||
5012 | if (!stdout_is_tty) | |
5013 | dup2(fd, STDOUT_FILENO); | |
5014 | ||
5015 | if (!stderr_is_tty) | |
5016 | dup2(fd, STDERR_FILENO); | |
5017 | ||
5018 | if (fd > 2) | |
5019 | close(fd); | |
5020 | } | |
5021 | ||
5022 | /* Count arguments */ | |
5023 | va_start(ap, path); | |
5024 | for (n = 0; va_arg(ap, char*); n++) | |
5025 | ; | |
5026 | va_end(ap); | |
5027 | ||
5028 | /* Allocate strv */ | |
5029 | l = alloca(sizeof(char *) * (n + 1)); | |
5030 | ||
5031 | /* Fill in arguments */ | |
5032 | va_start(ap, path); | |
5033 | for (i = 0; i <= n; i++) | |
5034 | l[i] = va_arg(ap, char*); | |
5035 | va_end(ap); | |
5036 | ||
5037 | execv(path, l); | |
5038 | _exit(EXIT_FAILURE); | |
5039 | } | |
68faf98c LP |
5040 | |
5041 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5042 | struct rlimit highest, fixed; | |
5043 | ||
5044 | assert(rlim); | |
5045 | ||
5046 | if (setrlimit(resource, rlim) >= 0) | |
5047 | return 0; | |
5048 | ||
5049 | if (errno != EPERM) | |
5050 | return -errno; | |
5051 | ||
5052 | /* So we failed to set the desired setrlimit, then let's try | |
5053 | * to get as close as we can */ | |
5054 | assert_se(getrlimit(resource, &highest) == 0); | |
5055 | ||
5056 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5057 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5058 | ||
5059 | if (setrlimit(resource, &fixed) < 0) | |
5060 | return -errno; | |
5061 | ||
5062 | return 0; | |
5063 | } | |
3d9a4122 | 5064 | |
ab94af92 | 5065 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
49aa47c7 LP |
5066 | _cleanup_fclose_ FILE *f = NULL; |
5067 | char *value = NULL; | |
ab94af92 | 5068 | int r; |
ab94af92 LP |
5069 | bool done = false; |
5070 | size_t l; | |
49aa47c7 | 5071 | const char *path; |
ab94af92 | 5072 | |
49aa47c7 | 5073 | assert(pid >= 0); |
ab94af92 LP |
5074 | assert(field); |
5075 | assert(_value); | |
5076 | ||
5077 | if (pid == 0) | |
49aa47c7 LP |
5078 | path = "/proc/self/environ"; |
5079 | else | |
5080 | path = procfs_file_alloca(pid, "environ"); | |
ab94af92 LP |
5081 | |
5082 | f = fopen(path, "re"); | |
5083 | if (!f) | |
5084 | return -errno; | |
5085 | ||
5086 | l = strlen(field); | |
5087 | r = 0; | |
5088 | ||
5089 | do { | |
5090 | char line[LINE_MAX]; | |
5091 | unsigned i; | |
5092 | ||
5093 | for (i = 0; i < sizeof(line)-1; i++) { | |
5094 | int c; | |
5095 | ||
5096 | c = getc(f); | |
5097 | if (_unlikely_(c == EOF)) { | |
5098 | done = true; | |
5099 | break; | |
5100 | } else if (c == 0) | |
5101 | break; | |
5102 | ||
5103 | line[i] = c; | |
5104 | } | |
5105 | line[i] = 0; | |
5106 | ||
5107 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5108 | value = strdup(line + l + 1); | |
49aa47c7 LP |
5109 | if (!value) |
5110 | return -ENOMEM; | |
ab94af92 LP |
5111 | |
5112 | r = 1; | |
5113 | break; | |
5114 | } | |
5115 | ||
5116 | } while (!done); | |
5117 | ||
49aa47c7 | 5118 | *_value = value; |
ab94af92 LP |
5119 | return r; |
5120 | } | |
d889a206 | 5121 | |
49dbfa7b LP |
5122 | bool is_valid_documentation_url(const char *url) { |
5123 | assert(url); | |
5124 | ||
5125 | if (startswith(url, "http://") && url[7]) | |
5126 | return true; | |
5127 | ||
5128 | if (startswith(url, "https://") && url[8]) | |
5129 | return true; | |
5130 | ||
5131 | if (startswith(url, "file:") && url[5]) | |
5132 | return true; | |
5133 | ||
5134 | if (startswith(url, "info:") && url[5]) | |
5135 | return true; | |
5136 | ||
5137 | if (startswith(url, "man:") && url[4]) | |
5138 | return true; | |
5139 | ||
5140 | return false; | |
5141 | } | |
9be346c9 HH |
5142 | |
5143 | bool in_initrd(void) { | |
a05f97b3 | 5144 | static __thread int saved = -1; |
825c6fe5 | 5145 | struct statfs s; |
8f33b5b8 | 5146 | |
825c6fe5 LP |
5147 | if (saved >= 0) |
5148 | return saved; | |
5149 | ||
5150 | /* We make two checks here: | |
5151 | * | |
5152 | * 1. the flag file /etc/initrd-release must exist | |
5153 | * 2. the root file system must be a memory file system | |
5154 | * | |
5155 | * The second check is extra paranoia, since misdetecting an | |
5156 | * initrd can have bad bad consequences due the initrd | |
5157 | * emptying when transititioning to the main systemd. | |
5158 | */ | |
5159 | ||
5160 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5161 | statfs("/", &s) >= 0 && | |
943aad8c | 5162 | is_temporary_fs(&s); |
9be346c9 | 5163 | |
8f33b5b8 | 5164 | return saved; |
9be346c9 | 5165 | } |
069cfc85 LP |
5166 | |
5167 | void warn_melody(void) { | |
e67f47e5 | 5168 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5169 | |
5170 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5171 | if (fd < 0) | |
5172 | return; | |
5173 | ||
040f18ea | 5174 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5175 | |
5176 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5177 | usleep(125*USEC_PER_MSEC); | |
5178 | ||
5179 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5180 | usleep(125*USEC_PER_MSEC); | |
5181 | ||
5182 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5183 | usleep(125*USEC_PER_MSEC); | |
5184 | ||
5185 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5186 | } |
cd3bd60a LP |
5187 | |
5188 | int make_console_stdio(void) { | |
5189 | int fd, r; | |
5190 | ||
5191 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5192 | ||
5193 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5194 | if (fd < 0) { | |
5195 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5196 | return fd; | |
5197 | } | |
5198 | ||
5199 | r = make_stdio(fd); | |
5200 | if (r < 0) { | |
5201 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5202 | return r; | |
5203 | } | |
5204 | ||
5205 | return 0; | |
5206 | } | |
7c5f152a LP |
5207 | |
5208 | int get_home_dir(char **_h) { | |
5209 | char *h; | |
5210 | const char *e; | |
5211 | uid_t u; | |
5212 | struct passwd *p; | |
5213 | ||
5214 | assert(_h); | |
5215 | ||
5216 | /* Take the user specified one */ | |
5217 | e = getenv("HOME"); | |
5218 | if (e) { | |
5219 | h = strdup(e); | |
5220 | if (!h) | |
5221 | return -ENOMEM; | |
5222 | ||
5223 | *_h = h; | |
5224 | return 0; | |
5225 | } | |
5226 | ||
5227 | /* Hardcode home directory for root to avoid NSS */ | |
5228 | u = getuid(); | |
5229 | if (u == 0) { | |
5230 | h = strdup("/root"); | |
5231 | if (!h) | |
5232 | return -ENOMEM; | |
5233 | ||
5234 | *_h = h; | |
5235 | return 0; | |
5236 | } | |
5237 | ||
5238 | /* Check the database... */ | |
5239 | errno = 0; | |
5240 | p = getpwuid(u); | |
5241 | if (!p) | |
bcb161b0 | 5242 | return errno > 0 ? -errno : -ESRCH; |
7c5f152a LP |
5243 | |
5244 | if (!path_is_absolute(p->pw_dir)) | |
5245 | return -EINVAL; | |
5246 | ||
5247 | h = strdup(p->pw_dir); | |
5248 | if (!h) | |
5249 | return -ENOMEM; | |
5250 | ||
5251 | *_h = h; | |
5252 | return 0; | |
5253 | } | |
5254 | ||
0b507b17 LP |
5255 | bool filename_is_safe(const char *p) { |
5256 | ||
5257 | if (isempty(p)) | |
5258 | return false; | |
5259 | ||
5260 | if (strchr(p, '/')) | |
5261 | return false; | |
5262 | ||
5263 | if (streq(p, ".")) | |
5264 | return false; | |
5265 | ||
5266 | if (streq(p, "..")) | |
5267 | return false; | |
5268 | ||
5269 | if (strlen(p) > FILENAME_MAX) | |
5270 | return false; | |
5271 | ||
5272 | return true; | |
5273 | } | |
5274 | ||
5275 | bool string_is_safe(const char *p) { | |
5276 | const char *t; | |
5277 | ||
5278 | assert(p); | |
5279 | ||
5280 | for (t = p; *t; t++) { | |
01539d6e | 5281 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5282 | return false; |
5283 | ||
011afa76 | 5284 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5285 | return false; |
5286 | } | |
5287 | ||
5288 | return true; | |
5289 | } | |
cfbc22ab | 5290 | |
ac4c8d6d ZJS |
5291 | /** |
5292 | * Check if a string contains control characters. | |
5293 | * Spaces and tabs are not considered control characters. | |
5294 | */ | |
4d1a6904 LP |
5295 | bool string_has_cc(const char *p) { |
5296 | const char *t; | |
5297 | ||
5298 | assert(p); | |
5299 | ||
5300 | for (t = p; *t; t++) | |
da2620a5 | 5301 | if (*t > 0 && *t < ' ' && *t != '\t') |
4d1a6904 LP |
5302 | return true; |
5303 | ||
5304 | return false; | |
5305 | } | |
5306 | ||
e884315e LP |
5307 | bool path_is_safe(const char *p) { |
5308 | ||
5309 | if (isempty(p)) | |
5310 | return false; | |
5311 | ||
5312 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5313 | return false; | |
5314 | ||
5315 | if (strlen(p) > PATH_MAX) | |
5316 | return false; | |
5317 | ||
5318 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5319 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5320 | return false; | |
5321 | ||
5322 | if (strstr(p, "//")) | |
5323 | return false; | |
5324 | ||
5325 | return true; | |
5326 | } | |
5327 | ||
a9e12476 KS |
5328 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5329 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5330 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5331 | size_t l, u, idx; |
5332 | const void *p; | |
5333 | int comparison; | |
5334 | ||
5335 | l = 0; | |
5336 | u = nmemb; | |
5337 | while (l < u) { | |
5338 | idx = (l + u) / 2; | |
5339 | p = (void *)(((const char *) base) + (idx * size)); | |
5340 | comparison = compar(key, p, arg); | |
5341 | if (comparison < 0) | |
5342 | u = idx; | |
5343 | else if (comparison > 0) | |
5344 | l = idx + 1; | |
5345 | else | |
5346 | return (void *)p; | |
5347 | } | |
5348 | return NULL; | |
5349 | } | |
09017585 MS |
5350 | |
5351 | bool is_locale_utf8(void) { | |
5352 | const char *set; | |
5353 | static int cached_answer = -1; | |
5354 | ||
5355 | if (cached_answer >= 0) | |
5356 | goto out; | |
5357 | ||
5358 | if (!setlocale(LC_ALL, "")) { | |
5359 | cached_answer = true; | |
5360 | goto out; | |
5361 | } | |
5362 | ||
5363 | set = nl_langinfo(CODESET); | |
5364 | if (!set) { | |
5365 | cached_answer = true; | |
5366 | goto out; | |
5367 | } | |
5368 | ||
fee79e01 HH |
5369 | if(streq(set, "UTF-8")) { |
5370 | cached_answer = true; | |
5371 | goto out; | |
5372 | } | |
5373 | ||
6cf2f1d9 HH |
5374 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
5375 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
5376 | set = setlocale(LC_CTYPE, NULL); |
5377 | if (!set) { | |
5378 | cached_answer = true; | |
5379 | goto out; | |
5380 | } | |
5381 | ||
6cf2f1d9 HH |
5382 | /* Check result, but ignore the result if C was set |
5383 | * explicitly. */ | |
5384 | cached_answer = | |
5385 | streq(set, "C") && | |
5386 | !getenv("LC_ALL") && | |
5387 | !getenv("LC_CTYPE") && | |
5388 | !getenv("LANG"); | |
fee79e01 | 5389 | |
09017585 | 5390 | out: |
6cf2f1d9 | 5391 | return (bool) cached_answer; |
09017585 | 5392 | } |
c339d977 MS |
5393 | |
5394 | const char *draw_special_char(DrawSpecialChar ch) { | |
5395 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
5396 | /* UTF-8 */ { | |
45a5ff0d MS |
5397 | [DRAW_TREE_VERT] = "\342\224\202 ", /* │ */ |
5398 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ | |
5399 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5400 | [DRAW_TREE_SPACE] = " ", /* */ |
45a5ff0d | 5401 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243 ", /* ‣ */ |
c339d977 MS |
5402 | }, |
5403 | /* ASCII fallback */ { | |
45a5ff0d MS |
5404 | [DRAW_TREE_VERT] = "| ", |
5405 | [DRAW_TREE_BRANCH] = "|-", | |
5406 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5407 | [DRAW_TREE_SPACE] = " ", |
45a5ff0d | 5408 | [DRAW_TRIANGULAR_BULLET] = "> ", |
c339d977 MS |
5409 | } |
5410 | }; | |
5411 | ||
5412 | return draw_table[!is_locale_utf8()][ch]; | |
5413 | } | |
409bc9c3 LP |
5414 | |
5415 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5416 | const char *f; | |
5417 | char *t, *r; | |
5418 | size_t l, old_len, new_len; | |
5419 | ||
5420 | assert(text); | |
5421 | assert(old_string); | |
5422 | assert(new_string); | |
5423 | ||
5424 | old_len = strlen(old_string); | |
5425 | new_len = strlen(new_string); | |
5426 | ||
5427 | l = strlen(text); | |
5428 | r = new(char, l+1); | |
5429 | if (!r) | |
5430 | return NULL; | |
5431 | ||
5432 | f = text; | |
5433 | t = r; | |
5434 | while (*f) { | |
5435 | char *a; | |
5436 | size_t d, nl; | |
5437 | ||
5438 | if (!startswith(f, old_string)) { | |
5439 | *(t++) = *(f++); | |
5440 | continue; | |
5441 | } | |
5442 | ||
5443 | d = t - r; | |
5444 | nl = l - old_len + new_len; | |
5445 | a = realloc(r, nl + 1); | |
5446 | if (!a) | |
5447 | goto oom; | |
5448 | ||
5449 | l = nl; | |
5450 | r = a; | |
5451 | t = r + d; | |
5452 | ||
5453 | t = stpcpy(t, new_string); | |
5454 | f += old_len; | |
5455 | } | |
5456 | ||
5457 | *t = 0; | |
5458 | return r; | |
5459 | ||
5460 | oom: | |
5461 | free(r); | |
5462 | return NULL; | |
5463 | } | |
e8bc0ea2 LP |
5464 | |
5465 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5466 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5467 | enum { |
5468 | STATE_OTHER, | |
5469 | STATE_ESCAPE, | |
5470 | STATE_BRACKET | |
5471 | } state = STATE_OTHER; | |
5472 | char *obuf = NULL; | |
5473 | size_t osz = 0, isz; | |
5474 | FILE *f; | |
5475 | ||
5476 | assert(ibuf); | |
5477 | assert(*ibuf); | |
5478 | ||
5479 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5480 | ||
5481 | isz = _isz ? *_isz : strlen(*ibuf); | |
5482 | ||
5483 | f = open_memstream(&obuf, &osz); | |
5484 | if (!f) | |
5485 | return NULL; | |
5486 | ||
5487 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5488 | ||
5489 | switch (state) { | |
5490 | ||
5491 | case STATE_OTHER: | |
5492 | if (i >= *ibuf + isz) /* EOT */ | |
5493 | break; | |
5494 | else if (*i == '\x1B') | |
5495 | state = STATE_ESCAPE; | |
5496 | else if (*i == '\t') | |
5497 | fputs(" ", f); | |
5498 | else | |
5499 | fputc(*i, f); | |
5500 | break; | |
5501 | ||
5502 | case STATE_ESCAPE: | |
5503 | if (i >= *ibuf + isz) { /* EOT */ | |
5504 | fputc('\x1B', f); | |
5505 | break; | |
5506 | } else if (*i == '[') { | |
5507 | state = STATE_BRACKET; | |
5508 | begin = i + 1; | |
5509 | } else { | |
5510 | fputc('\x1B', f); | |
5511 | fputc(*i, f); | |
5512 | state = STATE_OTHER; | |
5513 | } | |
5514 | ||
5515 | break; | |
5516 | ||
5517 | case STATE_BRACKET: | |
5518 | ||
5519 | if (i >= *ibuf + isz || /* EOT */ | |
5520 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5521 | fputc('\x1B', f); | |
5522 | fputc('[', f); | |
5523 | state = STATE_OTHER; | |
5524 | i = begin-1; | |
5525 | } else if (*i == 'm') | |
5526 | state = STATE_OTHER; | |
5527 | break; | |
5528 | } | |
5529 | } | |
5530 | ||
5531 | if (ferror(f)) { | |
5532 | fclose(f); | |
5533 | free(obuf); | |
5534 | return NULL; | |
5535 | } | |
5536 | ||
5537 | fclose(f); | |
5538 | ||
5539 | free(*ibuf); | |
5540 | *ibuf = obuf; | |
5541 | ||
5542 | if (_isz) | |
5543 | *_isz = osz; | |
5544 | ||
5545 | return obuf; | |
5546 | } | |
240dbaa4 LP |
5547 | |
5548 | int on_ac_power(void) { | |
5549 | bool found_offline = false, found_online = false; | |
5550 | _cleanup_closedir_ DIR *d = NULL; | |
5551 | ||
5552 | d = opendir("/sys/class/power_supply"); | |
5553 | if (!d) | |
5554 | return -errno; | |
5555 | ||
5556 | for (;;) { | |
5557 | struct dirent *de; | |
5558 | union dirent_storage buf; | |
240dbaa4 LP |
5559 | _cleanup_close_ int fd = -1, device = -1; |
5560 | char contents[6]; | |
5561 | ssize_t n; | |
5562 | int k; | |
5563 | ||
5564 | k = readdir_r(d, &buf.de, &de); | |
5565 | if (k != 0) | |
5566 | return -k; | |
5567 | ||
5568 | if (!de) | |
5569 | break; | |
5570 | ||
5571 | if (ignore_file(de->d_name)) | |
5572 | continue; | |
5573 | ||
5574 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5575 | if (device < 0) { | |
5576 | if (errno == ENOENT || errno == ENOTDIR) | |
5577 | continue; | |
5578 | ||
5579 | return -errno; | |
5580 | } | |
5581 | ||
5582 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5583 | if (fd < 0) { | |
5584 | if (errno == ENOENT) | |
5585 | continue; | |
5586 | ||
5587 | return -errno; | |
5588 | } | |
5589 | ||
5590 | n = read(fd, contents, sizeof(contents)); | |
5591 | if (n < 0) | |
5592 | return -errno; | |
5593 | ||
5594 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5595 | continue; | |
5596 | ||
5597 | close_nointr_nofail(fd); | |
5598 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5599 | if (fd < 0) { | |
5600 | if (errno == ENOENT) | |
5601 | continue; | |
5602 | ||
5603 | return -errno; | |
5604 | } | |
5605 | ||
5606 | n = read(fd, contents, sizeof(contents)); | |
5607 | if (n < 0) | |
5608 | return -errno; | |
5609 | ||
5610 | if (n != 2 || contents[1] != '\n') | |
5611 | return -EIO; | |
5612 | ||
5613 | if (contents[0] == '1') { | |
5614 | found_online = true; | |
5615 | break; | |
5616 | } else if (contents[0] == '0') | |
5617 | found_offline = true; | |
5618 | else | |
5619 | return -EIO; | |
5620 | } | |
5621 | ||
5622 | return found_online || !found_offline; | |
5623 | } | |
fabe5c0e LP |
5624 | |
5625 | static int search_and_fopen_internal(const char *path, const char *mode, char **search, FILE **_f) { | |
5626 | char **i; | |
5627 | ||
5628 | assert(path); | |
5629 | assert(mode); | |
5630 | assert(_f); | |
5631 | ||
5632 | if (!path_strv_canonicalize_uniq(search)) | |
5633 | return -ENOMEM; | |
5634 | ||
5635 | STRV_FOREACH(i, search) { | |
5636 | _cleanup_free_ char *p = NULL; | |
5637 | FILE *f; | |
5638 | ||
5639 | p = strjoin(*i, "/", path, NULL); | |
5640 | if (!p) | |
5641 | return -ENOMEM; | |
5642 | ||
5643 | f = fopen(p, mode); | |
5644 | if (f) { | |
5645 | *_f = f; | |
5646 | return 0; | |
5647 | } | |
5648 | ||
5649 | if (errno != ENOENT) | |
5650 | return -errno; | |
5651 | } | |
5652 | ||
5653 | return -ENOENT; | |
5654 | } | |
5655 | ||
5656 | int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f) { | |
5657 | _cleanup_strv_free_ char **copy = NULL; | |
5658 | ||
5659 | assert(path); | |
5660 | assert(mode); | |
5661 | assert(_f); | |
5662 | ||
5663 | if (path_is_absolute(path)) { | |
5664 | FILE *f; | |
5665 | ||
5666 | f = fopen(path, mode); | |
5667 | if (f) { | |
5668 | *_f = f; | |
5669 | return 0; | |
5670 | } | |
5671 | ||
5672 | return -errno; | |
5673 | } | |
5674 | ||
5675 | copy = strv_copy((char**) search); | |
5676 | if (!copy) | |
5677 | return -ENOMEM; | |
5678 | ||
5679 | return search_and_fopen_internal(path, mode, copy, _f); | |
5680 | } | |
5681 | ||
5682 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f) { | |
5683 | _cleanup_strv_free_ char **s = NULL; | |
5684 | ||
5685 | if (path_is_absolute(path)) { | |
5686 | FILE *f; | |
5687 | ||
5688 | f = fopen(path, mode); | |
5689 | if (f) { | |
5690 | *_f = f; | |
5691 | return 0; | |
5692 | } | |
5693 | ||
5694 | return -errno; | |
5695 | } | |
5696 | ||
5697 | s = strv_split_nulstr(search); | |
5698 | if (!s) | |
5699 | return -ENOMEM; | |
5700 | ||
5701 | return search_and_fopen_internal(path, mode, s, _f); | |
5702 | } | |
c17ec25e | 5703 | |
d34cd374 | 5704 | int create_tmp_dir(char template[], char** dir_name) { |
c17ec25e | 5705 | int r = 0; |
32b2634e | 5706 | char *d = NULL, *dt; |
c17ec25e MS |
5707 | |
5708 | assert(dir_name); | |
5709 | ||
5c0d398d LP |
5710 | RUN_WITH_UMASK(0077) { |
5711 | d = mkdtemp(template); | |
5712 | } | |
c17ec25e | 5713 | if (!d) { |
d34cd374 ZJS |
5714 | log_error("Can't create directory %s: %m", template); |
5715 | return -errno; | |
c17ec25e MS |
5716 | } |
5717 | ||
d34cd374 ZJS |
5718 | dt = strjoin(d, "/tmp", NULL); |
5719 | if (!dt) { | |
c17ec25e | 5720 | r = log_oom(); |
f36a783c | 5721 | goto fail3; |
c17ec25e MS |
5722 | } |
5723 | ||
5c0d398d LP |
5724 | RUN_WITH_UMASK(0000) { |
5725 | r = mkdir(dt, 0777); | |
5726 | } | |
5727 | if (r < 0) { | |
d34cd374 ZJS |
5728 | log_error("Can't create directory %s: %m", dt); |
5729 | r = -errno; | |
f36a783c | 5730 | goto fail2; |
d34cd374 ZJS |
5731 | } |
5732 | log_debug("Created temporary directory %s", dt); | |
5733 | ||
5734 | r = chmod(dt, 0777 | S_ISVTX); | |
5735 | if (r < 0) { | |
5736 | log_error("Failed to chmod %s: %m", dt); | |
5737 | r = -errno; | |
5738 | goto fail1; | |
c17ec25e | 5739 | } |
d34cd374 | 5740 | log_debug("Set sticky bit on %s", dt); |
c17ec25e | 5741 | |
d34cd374 | 5742 | *dir_name = dt; |
c17ec25e MS |
5743 | |
5744 | return 0; | |
d34cd374 ZJS |
5745 | fail1: |
5746 | rmdir(dt); | |
5747 | fail2: | |
f36a783c VP |
5748 | free(dt); |
5749 | fail3: | |
d34cd374 | 5750 | rmdir(template); |
c17ec25e MS |
5751 | return r; |
5752 | } | |
66e35261 LP |
5753 | |
5754 | char *strextend(char **x, ...) { | |
5755 | va_list ap; | |
5756 | size_t f, l; | |
5757 | char *r, *p; | |
5758 | ||
5759 | assert(x); | |
5760 | ||
5761 | l = f = *x ? strlen(*x) : 0; | |
5762 | ||
5763 | va_start(ap, x); | |
5764 | for (;;) { | |
5765 | const char *t; | |
5766 | size_t n; | |
5767 | ||
5768 | t = va_arg(ap, const char *); | |
5769 | if (!t) | |
5770 | break; | |
5771 | ||
5772 | n = strlen(t); | |
5773 | if (n > ((size_t) -1) - l) { | |
5774 | va_end(ap); | |
5775 | return NULL; | |
5776 | } | |
5777 | ||
5778 | l += n; | |
5779 | } | |
5780 | va_end(ap); | |
5781 | ||
5782 | r = realloc(*x, l+1); | |
5783 | if (!r) | |
5784 | return NULL; | |
5785 | ||
5786 | p = r + f; | |
5787 | ||
5788 | va_start(ap, x); | |
5789 | for (;;) { | |
5790 | const char *t; | |
5791 | ||
5792 | t = va_arg(ap, const char *); | |
5793 | if (!t) | |
5794 | break; | |
5795 | ||
5796 | p = stpcpy(p, t); | |
5797 | } | |
5798 | va_end(ap); | |
5799 | ||
5800 | *p = 0; | |
5801 | *x = r; | |
5802 | ||
5803 | return r + l; | |
5804 | } | |
9a17484d LP |
5805 | |
5806 | char *strrep(const char *s, unsigned n) { | |
5807 | size_t l; | |
5808 | char *r, *p; | |
5809 | unsigned i; | |
5810 | ||
5811 | assert(s); | |
5812 | ||
5813 | l = strlen(s); | |
5814 | p = r = malloc(l * n + 1); | |
5815 | if (!r) | |
5816 | return NULL; | |
5817 | ||
5818 | for (i = 0; i < n; i++) | |
5819 | p = stpcpy(p, s); | |
5820 | ||
5821 | *p = 0; | |
5822 | return r; | |
5823 | } | |
392d5b37 LP |
5824 | |
5825 | void* greedy_realloc(void **p, size_t *allocated, size_t need) { | |
5826 | size_t a; | |
5827 | void *q; | |
5828 | ||
5829 | if (*allocated >= need) | |
5830 | return *p; | |
5831 | ||
9607d947 | 5832 | a = MAX(64u, need * 2); |
392d5b37 LP |
5833 | q = realloc(*p, a); |
5834 | if (!q) | |
5835 | return NULL; | |
5836 | ||
5837 | *p = q; | |
5838 | *allocated = a; | |
5839 | return q; | |
5840 | } | |
aa96c6cb LP |
5841 | |
5842 | bool id128_is_valid(const char *s) { | |
5843 | size_t i, l; | |
5844 | ||
5845 | l = strlen(s); | |
5846 | if (l == 32) { | |
5847 | ||
5848 | /* Simple formatted 128bit hex string */ | |
5849 | ||
5850 | for (i = 0; i < l; i++) { | |
5851 | char c = s[i]; | |
5852 | ||
5853 | if (!(c >= '0' && c <= '9') && | |
5854 | !(c >= 'a' && c <= 'z') && | |
5855 | !(c >= 'A' && c <= 'Z')) | |
5856 | return false; | |
5857 | } | |
5858 | ||
5859 | } else if (l == 36) { | |
5860 | ||
5861 | /* Formatted UUID */ | |
5862 | ||
5863 | for (i = 0; i < l; i++) { | |
5864 | char c = s[i]; | |
5865 | ||
5866 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
5867 | if (c != '-') | |
5868 | return false; | |
5869 | } else { | |
5870 | if (!(c >= '0' && c <= '9') && | |
5871 | !(c >= 'a' && c <= 'z') && | |
5872 | !(c >= 'A' && c <= 'Z')) | |
5873 | return false; | |
5874 | } | |
5875 | } | |
5876 | ||
5877 | } else | |
5878 | return false; | |
5879 | ||
5880 | return true; | |
5881 | } | |
7085053a DW |
5882 | |
5883 | void parse_user_at_host(char *arg, char **user, char **host) { | |
5884 | assert(arg); | |
5885 | assert(user); | |
5886 | assert(host); | |
5887 | ||
5888 | *host = strchr(arg, '@'); | |
5889 | if (*host == NULL) | |
5890 | *host = arg; | |
5891 | else { | |
5892 | *host[0]++ = '\0'; | |
5893 | *user = arg; | |
5894 | } | |
5895 | } | |
d4ac85c6 LP |
5896 | |
5897 | int split_pair(const char *s, const char *sep, char **l, char **r) { | |
5898 | char *x, *a, *b; | |
5899 | ||
5900 | assert(s); | |
5901 | assert(sep); | |
5902 | assert(l); | |
5903 | assert(r); | |
5904 | ||
5905 | if (isempty(sep)) | |
5906 | return -EINVAL; | |
5907 | ||
5908 | x = strstr(s, sep); | |
5909 | if (!x) | |
5910 | return -EINVAL; | |
5911 | ||
5912 | a = strndup(s, x - s); | |
5913 | if (!a) | |
5914 | return -ENOMEM; | |
5915 | ||
5916 | b = strdup(x + strlen(sep)); | |
5917 | if (!b) { | |
5918 | free(a); | |
5919 | return -ENOMEM; | |
5920 | } | |
5921 | ||
5922 | *l = a; | |
5923 | *r = b; | |
5924 | ||
5925 | return 0; | |
5926 | } |