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Commit | Line | Data |
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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> | |
60918275 LP |
59 | |
60 | #include "macro.h" | |
61 | #include "util.h" | |
1dccbe19 LP |
62 | #include "ioprio.h" |
63 | #include "missing.h" | |
a9f5d454 | 64 | #include "log.h" |
65d2ebdc | 65 | #include "strv.h" |
e51bc1a2 | 66 | #include "label.h" |
9eb977db | 67 | #include "path-util.h" |
d06dacd0 | 68 | #include "exit-status.h" |
83cc030f | 69 | #include "hashmap.h" |
56cf987f | 70 | |
9a0e6896 LP |
71 | int saved_argc = 0; |
72 | char **saved_argv = NULL; | |
73 | ||
37f85e66 | 74 | size_t page_size(void) { |
75 | static __thread size_t pgsz = 0; | |
76 | long r; | |
77 | ||
87d2c1ff | 78 | if (_likely_(pgsz > 0)) |
37f85e66 | 79 | return pgsz; |
80 | ||
81 | assert_se((r = sysconf(_SC_PAGESIZE)) > 0); | |
82 | ||
83 | pgsz = (size_t) r; | |
84 | ||
85 | return pgsz; | |
86 | } | |
87 | ||
e05797fb LP |
88 | bool streq_ptr(const char *a, const char *b) { |
89 | ||
90 | /* Like streq(), but tries to make sense of NULL pointers */ | |
91 | ||
92 | if (a && b) | |
93 | return streq(a, b); | |
94 | ||
95 | if (!a && !b) | |
96 | return true; | |
97 | ||
98 | return false; | |
99 | } | |
100 | ||
47be870b | 101 | usec_t now(clockid_t clock_id) { |
60918275 LP |
102 | struct timespec ts; |
103 | ||
47be870b | 104 | assert_se(clock_gettime(clock_id, &ts) == 0); |
60918275 LP |
105 | |
106 | return timespec_load(&ts); | |
107 | } | |
108 | ||
63983207 | 109 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { |
871d7de4 LP |
110 | assert(ts); |
111 | ||
112 | ts->realtime = now(CLOCK_REALTIME); | |
113 | ts->monotonic = now(CLOCK_MONOTONIC); | |
114 | ||
115 | return ts; | |
116 | } | |
117 | ||
a185c5aa LP |
118 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) { |
119 | int64_t delta; | |
120 | assert(ts); | |
121 | ||
122 | ts->realtime = u; | |
123 | ||
124 | if (u == 0) | |
125 | ts->monotonic = 0; | |
126 | else { | |
127 | delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; | |
128 | ||
129 | ts->monotonic = now(CLOCK_MONOTONIC); | |
130 | ||
131 | if ((int64_t) ts->monotonic > delta) | |
132 | ts->monotonic -= delta; | |
133 | else | |
134 | ts->monotonic = 0; | |
135 | } | |
136 | ||
137 | return ts; | |
138 | } | |
139 | ||
60918275 LP |
140 | usec_t timespec_load(const struct timespec *ts) { |
141 | assert(ts); | |
142 | ||
143 | return | |
144 | (usec_t) ts->tv_sec * USEC_PER_SEC + | |
145 | (usec_t) ts->tv_nsec / NSEC_PER_USEC; | |
146 | } | |
147 | ||
148 | struct timespec *timespec_store(struct timespec *ts, usec_t u) { | |
149 | assert(ts); | |
150 | ||
151 | ts->tv_sec = (time_t) (u / USEC_PER_SEC); | |
152 | ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); | |
153 | ||
154 | return ts; | |
155 | } | |
156 | ||
157 | usec_t timeval_load(const struct timeval *tv) { | |
158 | assert(tv); | |
159 | ||
160 | return | |
161 | (usec_t) tv->tv_sec * USEC_PER_SEC + | |
162 | (usec_t) tv->tv_usec; | |
163 | } | |
164 | ||
165 | struct timeval *timeval_store(struct timeval *tv, usec_t u) { | |
166 | assert(tv); | |
167 | ||
168 | tv->tv_sec = (time_t) (u / USEC_PER_SEC); | |
169 | tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); | |
170 | ||
171 | return tv; | |
172 | } | |
173 | ||
174 | bool endswith(const char *s, const char *postfix) { | |
175 | size_t sl, pl; | |
176 | ||
177 | assert(s); | |
178 | assert(postfix); | |
179 | ||
180 | sl = strlen(s); | |
181 | pl = strlen(postfix); | |
182 | ||
d4d0d4db LP |
183 | if (pl == 0) |
184 | return true; | |
185 | ||
60918275 LP |
186 | if (sl < pl) |
187 | return false; | |
188 | ||
189 | return memcmp(s + sl - pl, postfix, pl) == 0; | |
190 | } | |
191 | ||
192 | bool startswith(const char *s, const char *prefix) { | |
193 | size_t sl, pl; | |
194 | ||
195 | assert(s); | |
196 | assert(prefix); | |
197 | ||
198 | sl = strlen(s); | |
199 | pl = strlen(prefix); | |
200 | ||
d4d0d4db LP |
201 | if (pl == 0) |
202 | return true; | |
203 | ||
60918275 LP |
204 | if (sl < pl) |
205 | return false; | |
206 | ||
207 | return memcmp(s, prefix, pl) == 0; | |
208 | } | |
209 | ||
3177a7fa MAP |
210 | bool startswith_no_case(const char *s, const char *prefix) { |
211 | size_t sl, pl; | |
212 | unsigned i; | |
213 | ||
214 | assert(s); | |
215 | assert(prefix); | |
216 | ||
217 | sl = strlen(s); | |
218 | pl = strlen(prefix); | |
219 | ||
220 | if (pl == 0) | |
221 | return true; | |
222 | ||
223 | if (sl < pl) | |
224 | return false; | |
225 | ||
226 | for(i = 0; i < pl; ++i) { | |
227 | if (tolower(s[i]) != tolower(prefix[i])) | |
228 | return false; | |
229 | } | |
230 | ||
231 | return true; | |
232 | } | |
233 | ||
79d6d816 LP |
234 | bool first_word(const char *s, const char *word) { |
235 | size_t sl, wl; | |
236 | ||
237 | assert(s); | |
238 | assert(word); | |
239 | ||
240 | sl = strlen(s); | |
241 | wl = strlen(word); | |
242 | ||
243 | if (sl < wl) | |
244 | return false; | |
245 | ||
d4d0d4db LP |
246 | if (wl == 0) |
247 | return true; | |
248 | ||
79d6d816 LP |
249 | if (memcmp(s, word, wl) != 0) |
250 | return false; | |
251 | ||
d4d0d4db LP |
252 | return s[wl] == 0 || |
253 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
254 | } |
255 | ||
42f4e3c4 | 256 | int close_nointr(int fd) { |
60918275 LP |
257 | assert(fd >= 0); |
258 | ||
259 | for (;;) { | |
260 | int r; | |
261 | ||
48f82119 LP |
262 | r = close(fd); |
263 | if (r >= 0) | |
60918275 LP |
264 | return r; |
265 | ||
266 | if (errno != EINTR) | |
48f82119 | 267 | return -errno; |
60918275 LP |
268 | } |
269 | } | |
85261803 | 270 | |
85f136b5 | 271 | void close_nointr_nofail(int fd) { |
80876c20 | 272 | int saved_errno = errno; |
85f136b5 LP |
273 | |
274 | /* like close_nointr() but cannot fail, and guarantees errno | |
275 | * is unchanged */ | |
276 | ||
277 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
278 | |
279 | errno = saved_errno; | |
85f136b5 LP |
280 | } |
281 | ||
5b6319dc LP |
282 | void close_many(const int fds[], unsigned n_fd) { |
283 | unsigned i; | |
284 | ||
285 | for (i = 0; i < n_fd; i++) | |
286 | close_nointr_nofail(fds[i]); | |
287 | } | |
288 | ||
85261803 LP |
289 | int parse_boolean(const char *v) { |
290 | assert(v); | |
291 | ||
44d8db9e | 292 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on")) |
85261803 | 293 | return 1; |
44d8db9e | 294 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off")) |
85261803 LP |
295 | return 0; |
296 | ||
297 | return -EINVAL; | |
298 | } | |
299 | ||
3ba686c1 | 300 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 301 | unsigned long ul = 0; |
3ba686c1 LP |
302 | pid_t pid; |
303 | int r; | |
304 | ||
305 | assert(s); | |
306 | assert(ret_pid); | |
307 | ||
308 | if ((r = safe_atolu(s, &ul)) < 0) | |
309 | return r; | |
310 | ||
311 | pid = (pid_t) ul; | |
312 | ||
313 | if ((unsigned long) pid != ul) | |
314 | return -ERANGE; | |
315 | ||
316 | if (pid <= 0) | |
317 | return -ERANGE; | |
318 | ||
319 | *ret_pid = pid; | |
320 | return 0; | |
321 | } | |
322 | ||
034a2a52 LP |
323 | int parse_uid(const char *s, uid_t* ret_uid) { |
324 | unsigned long ul = 0; | |
325 | uid_t uid; | |
326 | int r; | |
327 | ||
328 | assert(s); | |
329 | assert(ret_uid); | |
330 | ||
331 | if ((r = safe_atolu(s, &ul)) < 0) | |
332 | return r; | |
333 | ||
334 | uid = (uid_t) ul; | |
335 | ||
336 | if ((unsigned long) uid != ul) | |
337 | return -ERANGE; | |
338 | ||
339 | *ret_uid = uid; | |
340 | return 0; | |
341 | } | |
342 | ||
85261803 LP |
343 | int safe_atou(const char *s, unsigned *ret_u) { |
344 | char *x = NULL; | |
034c6ed7 | 345 | unsigned long l; |
85261803 LP |
346 | |
347 | assert(s); | |
348 | assert(ret_u); | |
349 | ||
350 | errno = 0; | |
351 | l = strtoul(s, &x, 0); | |
352 | ||
353 | if (!x || *x || errno) | |
354 | return errno ? -errno : -EINVAL; | |
355 | ||
034c6ed7 | 356 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
357 | return -ERANGE; |
358 | ||
359 | *ret_u = (unsigned) l; | |
360 | return 0; | |
361 | } | |
362 | ||
363 | int safe_atoi(const char *s, int *ret_i) { | |
364 | char *x = NULL; | |
034c6ed7 | 365 | long l; |
85261803 LP |
366 | |
367 | assert(s); | |
368 | assert(ret_i); | |
369 | ||
370 | errno = 0; | |
371 | l = strtol(s, &x, 0); | |
372 | ||
373 | if (!x || *x || errno) | |
374 | return errno ? -errno : -EINVAL; | |
375 | ||
034c6ed7 | 376 | if ((long) (int) l != l) |
85261803 LP |
377 | return -ERANGE; |
378 | ||
034c6ed7 LP |
379 | *ret_i = (int) l; |
380 | return 0; | |
381 | } | |
382 | ||
034c6ed7 LP |
383 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
384 | char *x = NULL; | |
385 | unsigned long long l; | |
386 | ||
387 | assert(s); | |
388 | assert(ret_llu); | |
389 | ||
390 | errno = 0; | |
391 | l = strtoull(s, &x, 0); | |
392 | ||
393 | if (!x || *x || errno) | |
394 | return errno ? -errno : -EINVAL; | |
395 | ||
396 | *ret_llu = l; | |
397 | return 0; | |
398 | } | |
399 | ||
400 | int safe_atolli(const char *s, long long int *ret_lli) { | |
401 | char *x = NULL; | |
402 | long long l; | |
403 | ||
404 | assert(s); | |
405 | assert(ret_lli); | |
406 | ||
407 | errno = 0; | |
408 | l = strtoll(s, &x, 0); | |
409 | ||
410 | if (!x || *x || errno) | |
411 | return errno ? -errno : -EINVAL; | |
412 | ||
413 | *ret_lli = l; | |
85261803 LP |
414 | return 0; |
415 | } | |
a41e8209 | 416 | |
a41e8209 | 417 | /* Split a string into words. */ |
65d2ebdc | 418 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
419 | char *current; |
420 | ||
421 | current = *state ? *state : (char*) c; | |
422 | ||
423 | if (!*current || *c == 0) | |
424 | return NULL; | |
425 | ||
65d2ebdc LP |
426 | current += strspn(current, separator); |
427 | *l = strcspn(current, separator); | |
82919e3d LP |
428 | *state = current+*l; |
429 | ||
430 | return (char*) current; | |
431 | } | |
432 | ||
034c6ed7 LP |
433 | /* Split a string into words, but consider strings enclosed in '' and |
434 | * "" as words even if they include spaces. */ | |
435 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
436 | char *current, *e; |
437 | bool escaped = false; | |
034c6ed7 LP |
438 | |
439 | current = *state ? *state : (char*) c; | |
440 | ||
441 | if (!*current || *c == 0) | |
442 | return NULL; | |
443 | ||
444 | current += strspn(current, WHITESPACE); | |
445 | ||
446 | if (*current == '\'') { | |
447 | current ++; | |
034c6ed7 | 448 | |
0bab36f2 LP |
449 | for (e = current; *e; e++) { |
450 | if (escaped) | |
451 | escaped = false; | |
452 | else if (*e == '\\') | |
453 | escaped = true; | |
454 | else if (*e == '\'') | |
455 | break; | |
456 | } | |
457 | ||
458 | *l = e-current; | |
459 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
460 | } else if (*current == '\"') { |
461 | current ++; | |
034c6ed7 | 462 | |
0bab36f2 LP |
463 | for (e = current; *e; e++) { |
464 | if (escaped) | |
465 | escaped = false; | |
466 | else if (*e == '\\') | |
467 | escaped = true; | |
468 | else if (*e == '\"') | |
469 | break; | |
470 | } | |
471 | ||
472 | *l = e-current; | |
473 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 474 | } else { |
0bab36f2 LP |
475 | for (e = current; *e; e++) { |
476 | if (escaped) | |
477 | escaped = false; | |
478 | else if (*e == '\\') | |
479 | escaped = true; | |
480 | else if (strchr(WHITESPACE, *e)) | |
481 | break; | |
482 | } | |
483 | *l = e-current; | |
484 | *state = e; | |
034c6ed7 LP |
485 | } |
486 | ||
487 | return (char*) current; | |
488 | } | |
489 | ||
034c6ed7 LP |
490 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
491 | int r; | |
492 | FILE *f; | |
20c03b7b | 493 | char fn[PATH_MAX], line[LINE_MAX], *p; |
bb00e604 | 494 | long unsigned ppid; |
034c6ed7 | 495 | |
8480e784 | 496 | assert(pid > 0); |
034c6ed7 LP |
497 | assert(_ppid); |
498 | ||
bb00e604 | 499 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
8480e784 | 500 | char_array_0(fn); |
034c6ed7 | 501 | |
ccaa6149 | 502 | if (!(f = fopen(fn, "re"))) |
034c6ed7 LP |
503 | return -errno; |
504 | ||
505 | if (!(fgets(line, sizeof(line), f))) { | |
35d50f55 | 506 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
507 | fclose(f); |
508 | return r; | |
509 | } | |
510 | ||
511 | fclose(f); | |
512 | ||
513 | /* Let's skip the pid and comm fields. The latter is enclosed | |
514 | * in () but does not escape any () in its value, so let's | |
515 | * skip over it manually */ | |
516 | ||
517 | if (!(p = strrchr(line, ')'))) | |
518 | return -EIO; | |
519 | ||
520 | p++; | |
521 | ||
522 | if (sscanf(p, " " | |
523 | "%*c " /* state */ | |
bb00e604 | 524 | "%lu ", /* ppid */ |
034c6ed7 LP |
525 | &ppid) != 1) |
526 | return -EIO; | |
527 | ||
bb00e604 | 528 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
529 | return -ERANGE; |
530 | ||
531 | *_ppid = (pid_t) ppid; | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
7640a5de LP |
536 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
537 | int r; | |
538 | FILE *f; | |
539 | char fn[PATH_MAX], line[LINE_MAX], *p; | |
540 | ||
541 | assert(pid > 0); | |
542 | assert(st); | |
543 | ||
544 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); | |
545 | char_array_0(fn); | |
546 | ||
ccaa6149 | 547 | if (!(f = fopen(fn, "re"))) |
7640a5de LP |
548 | return -errno; |
549 | ||
550 | if (!(fgets(line, sizeof(line), f))) { | |
35d50f55 | 551 | r = feof(f) ? -EIO : -errno; |
7640a5de LP |
552 | fclose(f); |
553 | return r; | |
554 | } | |
555 | ||
556 | fclose(f); | |
557 | ||
558 | /* Let's skip the pid and comm fields. The latter is enclosed | |
559 | * in () but does not escape any () in its value, so let's | |
560 | * skip over it manually */ | |
561 | ||
562 | if (!(p = strrchr(line, ')'))) | |
563 | return -EIO; | |
564 | ||
565 | p++; | |
566 | ||
567 | if (sscanf(p, " " | |
568 | "%*c " /* state */ | |
569 | "%*d " /* ppid */ | |
570 | "%*d " /* pgrp */ | |
571 | "%*d " /* session */ | |
572 | "%*d " /* tty_nr */ | |
573 | "%*d " /* tpgid */ | |
574 | "%*u " /* flags */ | |
575 | "%*u " /* minflt */ | |
576 | "%*u " /* cminflt */ | |
577 | "%*u " /* majflt */ | |
578 | "%*u " /* cmajflt */ | |
579 | "%*u " /* utime */ | |
580 | "%*u " /* stime */ | |
581 | "%*d " /* cutime */ | |
582 | "%*d " /* cstime */ | |
583 | "%*d " /* priority */ | |
584 | "%*d " /* nice */ | |
585 | "%*d " /* num_threads */ | |
586 | "%*d " /* itrealvalue */ | |
587 | "%llu " /* starttime */, | |
588 | st) != 1) | |
589 | return -EIO; | |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
034c6ed7 LP |
594 | int write_one_line_file(const char *fn, const char *line) { |
595 | FILE *f; | |
596 | int r; | |
597 | ||
598 | assert(fn); | |
599 | assert(line); | |
600 | ||
03ad1136 LP |
601 | f = fopen(fn, "we"); |
602 | if (!f) | |
034c6ed7 LP |
603 | return -errno; |
604 | ||
34ca941c | 605 | errno = 0; |
034c6ed7 LP |
606 | if (fputs(line, f) < 0) { |
607 | r = -errno; | |
608 | goto finish; | |
609 | } | |
610 | ||
8e1bd70d LP |
611 | if (!endswith(line, "\n")) |
612 | fputc('\n', f); | |
613 | ||
151b190e LP |
614 | fflush(f); |
615 | ||
616 | if (ferror(f)) { | |
617 | if (errno != 0) | |
618 | r = -errno; | |
619 | else | |
620 | r = -EIO; | |
621 | } else | |
622 | r = 0; | |
623 | ||
034c6ed7 LP |
624 | finish: |
625 | fclose(f); | |
626 | return r; | |
627 | } | |
628 | ||
34ca941c LP |
629 | int fchmod_umask(int fd, mode_t m) { |
630 | mode_t u; | |
631 | int r; | |
632 | ||
633 | u = umask(0777); | |
634 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
635 | umask(u); | |
636 | ||
637 | return r; | |
638 | } | |
639 | ||
640 | int write_one_line_file_atomic(const char *fn, const char *line) { | |
641 | FILE *f; | |
642 | int r; | |
643 | char *p; | |
644 | ||
645 | assert(fn); | |
646 | assert(line); | |
647 | ||
648 | r = fopen_temporary(fn, &f, &p); | |
649 | if (r < 0) | |
650 | return r; | |
651 | ||
652 | fchmod_umask(fileno(f), 0644); | |
653 | ||
654 | errno = 0; | |
655 | if (fputs(line, f) < 0) { | |
656 | r = -errno; | |
657 | goto finish; | |
658 | } | |
659 | ||
660 | if (!endswith(line, "\n")) | |
661 | fputc('\n', f); | |
662 | ||
663 | fflush(f); | |
664 | ||
665 | if (ferror(f)) { | |
666 | if (errno != 0) | |
667 | r = -errno; | |
668 | else | |
669 | r = -EIO; | |
670 | } else { | |
671 | if (rename(p, fn) < 0) | |
672 | r = -errno; | |
673 | else | |
674 | r = 0; | |
675 | } | |
676 | ||
677 | finish: | |
678 | if (r < 0) | |
679 | unlink(p); | |
680 | ||
681 | fclose(f); | |
682 | free(p); | |
683 | ||
684 | return r; | |
685 | } | |
686 | ||
034c6ed7 LP |
687 | int read_one_line_file(const char *fn, char **line) { |
688 | FILE *f; | |
689 | int r; | |
97c4a07d | 690 | char t[LINE_MAX], *c; |
034c6ed7 LP |
691 | |
692 | assert(fn); | |
693 | assert(line); | |
694 | ||
4099a281 LP |
695 | f = fopen(fn, "re"); |
696 | if (!f) | |
034c6ed7 LP |
697 | return -errno; |
698 | ||
4099a281 LP |
699 | if (!fgets(t, sizeof(t), f)) { |
700 | ||
701 | if (ferror(f)) { | |
702 | r = -errno; | |
703 | goto finish; | |
704 | } | |
705 | ||
706 | t[0] = 0; | |
034c6ed7 LP |
707 | } |
708 | ||
4099a281 LP |
709 | c = strdup(t); |
710 | if (!c) { | |
034c6ed7 LP |
711 | r = -ENOMEM; |
712 | goto finish; | |
713 | } | |
714 | ||
6f9a471a LP |
715 | truncate_nl(c); |
716 | ||
034c6ed7 LP |
717 | *line = c; |
718 | r = 0; | |
719 | ||
720 | finish: | |
721 | fclose(f); | |
722 | return r; | |
723 | } | |
44d8db9e | 724 | |
34ca941c | 725 | int read_full_file(const char *fn, char **contents, size_t *size) { |
97c4a07d LP |
726 | FILE *f; |
727 | int r; | |
728 | size_t n, l; | |
729 | char *buf = NULL; | |
730 | struct stat st; | |
731 | ||
732 | if (!(f = fopen(fn, "re"))) | |
733 | return -errno; | |
734 | ||
735 | if (fstat(fileno(f), &st) < 0) { | |
736 | r = -errno; | |
737 | goto finish; | |
738 | } | |
739 | ||
34ca941c LP |
740 | /* Safety check */ |
741 | if (st.st_size > 4*1024*1024) { | |
742 | r = -E2BIG; | |
743 | goto finish; | |
744 | } | |
745 | ||
97c4a07d LP |
746 | n = st.st_size > 0 ? st.st_size : LINE_MAX; |
747 | l = 0; | |
748 | ||
749 | for (;;) { | |
750 | char *t; | |
751 | size_t k; | |
752 | ||
753 | if (!(t = realloc(buf, n+1))) { | |
754 | r = -ENOMEM; | |
755 | goto finish; | |
756 | } | |
757 | ||
758 | buf = t; | |
759 | k = fread(buf + l, 1, n - l, f); | |
760 | ||
761 | if (k <= 0) { | |
762 | if (ferror(f)) { | |
763 | r = -errno; | |
764 | goto finish; | |
765 | } | |
766 | ||
767 | break; | |
768 | } | |
769 | ||
770 | l += k; | |
771 | n *= 2; | |
772 | ||
773 | /* Safety check */ | |
774 | if (n > 4*1024*1024) { | |
775 | r = -E2BIG; | |
776 | goto finish; | |
777 | } | |
778 | } | |
779 | ||
f8440af5 | 780 | buf[l] = 0; |
97c4a07d LP |
781 | *contents = buf; |
782 | buf = NULL; | |
783 | ||
34ca941c LP |
784 | if (size) |
785 | *size = l; | |
786 | ||
97c4a07d LP |
787 | r = 0; |
788 | ||
789 | finish: | |
790 | fclose(f); | |
791 | free(buf); | |
792 | ||
793 | return r; | |
794 | } | |
795 | ||
796 | int parse_env_file( | |
797 | const char *fname, | |
c899f8c6 | 798 | const char *separator, ...) { |
97c4a07d | 799 | |
ce8a6aa1 | 800 | int r = 0; |
44d91056 | 801 | char *contents = NULL, *p; |
97c4a07d LP |
802 | |
803 | assert(fname); | |
c899f8c6 | 804 | assert(separator); |
97c4a07d | 805 | |
34ca941c | 806 | if ((r = read_full_file(fname, &contents, NULL)) < 0) |
97c4a07d LP |
807 | return r; |
808 | ||
809 | p = contents; | |
810 | for (;;) { | |
811 | const char *key = NULL; | |
812 | ||
c899f8c6 | 813 | p += strspn(p, separator); |
97c4a07d LP |
814 | p += strspn(p, WHITESPACE); |
815 | ||
816 | if (!*p) | |
817 | break; | |
818 | ||
819 | if (!strchr(COMMENTS, *p)) { | |
820 | va_list ap; | |
821 | char **value; | |
822 | ||
c899f8c6 | 823 | va_start(ap, separator); |
97c4a07d LP |
824 | while ((key = va_arg(ap, char *))) { |
825 | size_t n; | |
826 | char *v; | |
827 | ||
828 | value = va_arg(ap, char **); | |
829 | ||
830 | n = strlen(key); | |
831 | if (strncmp(p, key, n) != 0 || | |
832 | p[n] != '=') | |
833 | continue; | |
834 | ||
835 | p += n + 1; | |
c899f8c6 | 836 | n = strcspn(p, separator); |
97c4a07d LP |
837 | |
838 | if (n >= 2 && | |
e7db37dd LP |
839 | strchr(QUOTES, p[0]) && |
840 | p[n-1] == p[0]) | |
97c4a07d LP |
841 | v = strndup(p+1, n-2); |
842 | else | |
843 | v = strndup(p, n); | |
844 | ||
845 | if (!v) { | |
846 | r = -ENOMEM; | |
847 | va_end(ap); | |
848 | goto fail; | |
849 | } | |
850 | ||
dd36de4d KS |
851 | if (v[0] == '\0') { |
852 | /* return empty value strings as NULL */ | |
853 | free(v); | |
854 | v = NULL; | |
855 | } | |
856 | ||
97c4a07d LP |
857 | free(*value); |
858 | *value = v; | |
859 | ||
860 | p += n; | |
ce8a6aa1 LP |
861 | |
862 | r ++; | |
97c4a07d LP |
863 | break; |
864 | } | |
865 | va_end(ap); | |
866 | } | |
867 | ||
868 | if (!key) | |
c899f8c6 | 869 | p += strcspn(p, separator); |
97c4a07d LP |
870 | } |
871 | ||
97c4a07d LP |
872 | fail: |
873 | free(contents); | |
874 | return r; | |
875 | } | |
876 | ||
8c7be95e LP |
877 | int load_env_file( |
878 | const char *fname, | |
879 | char ***rl) { | |
880 | ||
881 | FILE *f; | |
6a39419f | 882 | char **m = NULL; |
8c7be95e LP |
883 | int r; |
884 | ||
885 | assert(fname); | |
886 | assert(rl); | |
887 | ||
888 | if (!(f = fopen(fname, "re"))) | |
889 | return -errno; | |
890 | ||
891 | while (!feof(f)) { | |
892 | char l[LINE_MAX], *p, *u; | |
893 | char **t; | |
894 | ||
895 | if (!fgets(l, sizeof(l), f)) { | |
896 | if (feof(f)) | |
897 | break; | |
898 | ||
899 | r = -errno; | |
900 | goto finish; | |
901 | } | |
902 | ||
903 | p = strstrip(l); | |
904 | ||
905 | if (!*p) | |
906 | continue; | |
907 | ||
908 | if (strchr(COMMENTS, *p)) | |
909 | continue; | |
910 | ||
911 | if (!(u = normalize_env_assignment(p))) { | |
0d0f0c50 | 912 | r = log_oom(); |
8c7be95e LP |
913 | goto finish; |
914 | } | |
915 | ||
916 | t = strv_append(m, u); | |
917 | free(u); | |
918 | ||
919 | if (!t) { | |
0d0f0c50 | 920 | r = log_oom(); |
8c7be95e LP |
921 | goto finish; |
922 | } | |
923 | ||
924 | strv_free(m); | |
925 | m = t; | |
926 | } | |
927 | ||
928 | r = 0; | |
929 | ||
930 | *rl = m; | |
931 | m = NULL; | |
932 | ||
933 | finish: | |
934 | if (f) | |
935 | fclose(f); | |
936 | ||
937 | strv_free(m); | |
938 | ||
939 | return r; | |
940 | } | |
941 | ||
7640a5de | 942 | int write_env_file(const char *fname, char **l) { |
34ca941c | 943 | char **i, *p; |
7640a5de LP |
944 | FILE *f; |
945 | int r; | |
946 | ||
34ca941c LP |
947 | r = fopen_temporary(fname, &f, &p); |
948 | if (r < 0) | |
949 | return r; | |
7640a5de | 950 | |
34ca941c LP |
951 | fchmod_umask(fileno(f), 0644); |
952 | ||
953 | errno = 0; | |
7640a5de LP |
954 | STRV_FOREACH(i, l) { |
955 | fputs(*i, f); | |
956 | fputc('\n', f); | |
957 | } | |
958 | ||
959 | fflush(f); | |
960 | ||
34ca941c LP |
961 | if (ferror(f)) { |
962 | if (errno != 0) | |
963 | r = -errno; | |
964 | else | |
965 | r = -EIO; | |
966 | } else { | |
967 | if (rename(p, fname) < 0) | |
968 | r = -errno; | |
969 | else | |
970 | r = 0; | |
971 | } | |
972 | ||
973 | if (r < 0) | |
974 | unlink(p); | |
975 | ||
7640a5de | 976 | fclose(f); |
34ca941c | 977 | free(p); |
7640a5de LP |
978 | |
979 | return r; | |
980 | } | |
981 | ||
7072ced8 LP |
982 | char *truncate_nl(char *s) { |
983 | assert(s); | |
984 | ||
985 | s[strcspn(s, NEWLINE)] = 0; | |
986 | return s; | |
987 | } | |
988 | ||
87d2c1ff | 989 | int get_process_comm(pid_t pid, char **name) { |
7072ced8 LP |
990 | int r; |
991 | ||
7072ced8 LP |
992 | assert(name); |
993 | ||
87d2c1ff LP |
994 | if (pid == 0) |
995 | r = read_one_line_file("/proc/self/comm", name); | |
996 | else { | |
997 | char *p; | |
998 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) | |
999 | return -ENOMEM; | |
7072ced8 | 1000 | |
87d2c1ff LP |
1001 | r = read_one_line_file(p, name); |
1002 | free(p); | |
1003 | } | |
7072ced8 | 1004 | |
87d2c1ff | 1005 | return r; |
7072ced8 LP |
1006 | } |
1007 | ||
87d2c1ff LP |
1008 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
1009 | char *r, *k; | |
c59760ee LP |
1010 | int c; |
1011 | bool space = false; | |
1012 | size_t left; | |
1013 | FILE *f; | |
1014 | ||
c59760ee LP |
1015 | assert(max_length > 0); |
1016 | assert(line); | |
1017 | ||
87d2c1ff LP |
1018 | if (pid == 0) |
1019 | f = fopen("/proc/self/cmdline", "re"); | |
1020 | else { | |
1021 | char *p; | |
1022 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1023 | return -ENOMEM; | |
c59760ee | 1024 | |
87d2c1ff LP |
1025 | f = fopen(p, "re"); |
1026 | free(p); | |
1027 | } | |
c59760ee LP |
1028 | |
1029 | if (!f) | |
1030 | return -errno; | |
1031 | ||
87d2c1ff LP |
1032 | r = new(char, max_length); |
1033 | if (!r) { | |
c59760ee LP |
1034 | fclose(f); |
1035 | return -ENOMEM; | |
1036 | } | |
1037 | ||
1038 | k = r; | |
1039 | left = max_length; | |
1040 | while ((c = getc(f)) != EOF) { | |
1041 | ||
1042 | if (isprint(c)) { | |
1043 | if (space) { | |
1044 | if (left <= 4) | |
1045 | break; | |
1046 | ||
1047 | *(k++) = ' '; | |
057fbb58 | 1048 | left--; |
c59760ee LP |
1049 | space = false; |
1050 | } | |
1051 | ||
1052 | if (left <= 4) | |
1053 | break; | |
1054 | ||
1055 | *(k++) = (char) c; | |
057fbb58 | 1056 | left--; |
c59760ee LP |
1057 | } else |
1058 | space = true; | |
1059 | } | |
1060 | ||
1061 | if (left <= 4) { | |
1062 | size_t n = MIN(left-1, 3U); | |
1063 | memcpy(k, "...", n); | |
1064 | k[n] = 0; | |
1065 | } else | |
1066 | *k = 0; | |
1067 | ||
1068 | fclose(f); | |
1069 | ||
35d2e7ec LP |
1070 | /* Kernel threads have no argv[] */ |
1071 | if (r[0] == 0) { | |
1072 | char *t; | |
1073 | int h; | |
1074 | ||
1075 | free(r); | |
1076 | ||
87d2c1ff LP |
1077 | if (!comm_fallback) |
1078 | return -ENOENT; | |
1079 | ||
1080 | h = get_process_comm(pid, &t); | |
1081 | if (h < 0) | |
35d2e7ec LP |
1082 | return h; |
1083 | ||
b7def684 | 1084 | r = strjoin("[", t, "]", NULL); |
35d2e7ec LP |
1085 | free(t); |
1086 | ||
87d2c1ff | 1087 | if (!r) |
35d2e7ec LP |
1088 | return -ENOMEM; |
1089 | } | |
fa776d8e | 1090 | |
c59760ee LP |
1091 | *line = r; |
1092 | return 0; | |
1093 | } | |
1094 | ||
1e5678d0 LP |
1095 | int is_kernel_thread(pid_t pid) { |
1096 | char *p; | |
1097 | size_t count; | |
1098 | char c; | |
1099 | bool eof; | |
1100 | FILE *f; | |
1101 | ||
1102 | if (pid == 0) | |
1103 | return 0; | |
1104 | ||
1105 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1106 | return -ENOMEM; | |
1107 | ||
1108 | f = fopen(p, "re"); | |
1109 | free(p); | |
1110 | ||
1111 | if (!f) | |
1112 | return -errno; | |
1113 | ||
1114 | count = fread(&c, 1, 1, f); | |
1115 | eof = feof(f); | |
1116 | fclose(f); | |
1117 | ||
1118 | /* Kernel threads have an empty cmdline */ | |
1119 | ||
1120 | if (count <= 0) | |
1121 | return eof ? 1 : -errno; | |
1122 | ||
1123 | return 0; | |
1124 | } | |
1125 | ||
87d2c1ff LP |
1126 | int get_process_exe(pid_t pid, char **name) { |
1127 | int r; | |
1128 | ||
1129 | assert(name); | |
1130 | ||
1131 | if (pid == 0) | |
1132 | r = readlink_malloc("/proc/self/exe", name); | |
1133 | else { | |
1134 | char *p; | |
1135 | if (asprintf(&p, "/proc/%lu/exe", (unsigned long) pid) < 0) | |
1136 | return -ENOMEM; | |
1137 | ||
1138 | r = readlink_malloc(p, name); | |
1139 | free(p); | |
1140 | } | |
1141 | ||
1142 | return r; | |
1143 | } | |
1144 | ||
7e4ab3c5 LP |
1145 | int get_process_uid(pid_t pid, uid_t *uid) { |
1146 | char *p; | |
1147 | FILE *f; | |
1148 | int r; | |
1149 | ||
1150 | assert(uid); | |
1151 | ||
1152 | if (pid == 0) | |
1153 | return getuid(); | |
1154 | ||
1155 | if (asprintf(&p, "/proc/%lu/status", (unsigned long) pid) < 0) | |
1156 | return -ENOMEM; | |
1157 | ||
1158 | f = fopen(p, "re"); | |
1159 | free(p); | |
1160 | ||
1161 | if (!f) | |
1162 | return -errno; | |
1163 | ||
1164 | while (!feof(f)) { | |
1165 | char line[LINE_MAX], *l; | |
1166 | ||
1167 | if (!fgets(line, sizeof(line), f)) { | |
1168 | if (feof(f)) | |
1169 | break; | |
1170 | ||
1171 | r = -errno; | |
1172 | goto finish; | |
1173 | } | |
1174 | ||
1175 | l = strstrip(line); | |
1176 | ||
1177 | if (startswith(l, "Uid:")) { | |
1178 | l += 4; | |
1179 | l += strspn(l, WHITESPACE); | |
1180 | ||
1181 | l[strcspn(l, WHITESPACE)] = 0; | |
1182 | ||
1183 | r = parse_uid(l, uid); | |
1184 | goto finish; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | r = -EIO; | |
1189 | ||
1190 | finish: | |
1191 | fclose(f); | |
1192 | ||
1193 | return r; | |
1194 | } | |
1195 | ||
fab56fc5 LP |
1196 | char *strnappend(const char *s, const char *suffix, size_t b) { |
1197 | size_t a; | |
44d8db9e LP |
1198 | char *r; |
1199 | ||
fab56fc5 LP |
1200 | if (!s && !suffix) |
1201 | return strdup(""); | |
1202 | ||
1203 | if (!s) | |
1204 | return strndup(suffix, b); | |
1205 | ||
1206 | if (!suffix) | |
1207 | return strdup(s); | |
1208 | ||
44d8db9e LP |
1209 | assert(s); |
1210 | assert(suffix); | |
1211 | ||
1212 | a = strlen(s); | |
44d8db9e LP |
1213 | |
1214 | if (!(r = new(char, a+b+1))) | |
1215 | return NULL; | |
1216 | ||
1217 | memcpy(r, s, a); | |
1218 | memcpy(r+a, suffix, b); | |
1219 | r[a+b] = 0; | |
1220 | ||
1221 | return r; | |
1222 | } | |
87f0e418 | 1223 | |
fab56fc5 LP |
1224 | char *strappend(const char *s, const char *suffix) { |
1225 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
1226 | } | |
1227 | ||
87f0e418 LP |
1228 | int readlink_malloc(const char *p, char **r) { |
1229 | size_t l = 100; | |
1230 | ||
1231 | assert(p); | |
1232 | assert(r); | |
1233 | ||
1234 | for (;;) { | |
1235 | char *c; | |
1236 | ssize_t n; | |
1237 | ||
1238 | if (!(c = new(char, l))) | |
1239 | return -ENOMEM; | |
1240 | ||
1241 | if ((n = readlink(p, c, l-1)) < 0) { | |
1242 | int ret = -errno; | |
1243 | free(c); | |
1244 | return ret; | |
1245 | } | |
1246 | ||
1247 | if ((size_t) n < l-1) { | |
1248 | c[n] = 0; | |
1249 | *r = c; | |
1250 | return 0; | |
1251 | } | |
1252 | ||
1253 | free(c); | |
1254 | l *= 2; | |
1255 | } | |
1256 | } | |
1257 | ||
2c7108c4 LP |
1258 | int readlink_and_make_absolute(const char *p, char **r) { |
1259 | char *target, *k; | |
1260 | int j; | |
1261 | ||
1262 | assert(p); | |
1263 | assert(r); | |
1264 | ||
1265 | if ((j = readlink_malloc(p, &target)) < 0) | |
1266 | return j; | |
1267 | ||
1268 | k = file_in_same_dir(p, target); | |
1269 | free(target); | |
1270 | ||
1271 | if (!k) | |
1272 | return -ENOMEM; | |
1273 | ||
1274 | *r = k; | |
1275 | return 0; | |
1276 | } | |
1277 | ||
83096483 LP |
1278 | int readlink_and_canonicalize(const char *p, char **r) { |
1279 | char *t, *s; | |
1280 | int j; | |
1281 | ||
1282 | assert(p); | |
1283 | assert(r); | |
1284 | ||
1285 | j = readlink_and_make_absolute(p, &t); | |
1286 | if (j < 0) | |
1287 | return j; | |
1288 | ||
1289 | s = canonicalize_file_name(t); | |
1290 | if (s) { | |
1291 | free(t); | |
1292 | *r = s; | |
1293 | } else | |
1294 | *r = t; | |
1295 | ||
1296 | path_kill_slashes(*r); | |
1297 | ||
1298 | return 0; | |
1299 | } | |
1300 | ||
2a987ee8 LP |
1301 | int reset_all_signal_handlers(void) { |
1302 | int sig; | |
1303 | ||
1304 | for (sig = 1; sig < _NSIG; sig++) { | |
1305 | struct sigaction sa; | |
1306 | ||
1307 | if (sig == SIGKILL || sig == SIGSTOP) | |
1308 | continue; | |
1309 | ||
1310 | zero(sa); | |
1311 | sa.sa_handler = SIG_DFL; | |
431c32bf | 1312 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
1313 | |
1314 | /* On Linux the first two RT signals are reserved by | |
1315 | * glibc, and sigaction() will return EINVAL for them. */ | |
1316 | if ((sigaction(sig, &sa, NULL) < 0)) | |
1317 | if (errno != EINVAL) | |
1318 | return -errno; | |
1319 | } | |
1320 | ||
8e274523 | 1321 | return 0; |
2a987ee8 | 1322 | } |
4a72ff34 LP |
1323 | |
1324 | char *strstrip(char *s) { | |
57a8eca8 | 1325 | char *e; |
4a72ff34 LP |
1326 | |
1327 | /* Drops trailing whitespace. Modifies the string in | |
1328 | * place. Returns pointer to first non-space character */ | |
1329 | ||
1330 | s += strspn(s, WHITESPACE); | |
1331 | ||
57a8eca8 LP |
1332 | for (e = strchr(s, 0); e > s; e --) |
1333 | if (!strchr(WHITESPACE, e[-1])) | |
1334 | break; | |
4a72ff34 | 1335 | |
57a8eca8 | 1336 | *e = 0; |
4a72ff34 LP |
1337 | |
1338 | return s; | |
4a72ff34 LP |
1339 | } |
1340 | ||
ee9b5e01 LP |
1341 | char *delete_chars(char *s, const char *bad) { |
1342 | char *f, *t; | |
1343 | ||
1344 | /* Drops all whitespace, regardless where in the string */ | |
1345 | ||
1346 | for (f = s, t = s; *f; f++) { | |
1347 | if (strchr(bad, *f)) | |
1348 | continue; | |
1349 | ||
1350 | *(t++) = *f; | |
1351 | } | |
1352 | ||
1353 | *t = 0; | |
1354 | ||
1355 | return s; | |
1356 | } | |
1357 | ||
ab1f0633 LP |
1358 | bool in_charset(const char *s, const char* charset) { |
1359 | const char *i; | |
1360 | ||
1361 | assert(s); | |
1362 | assert(charset); | |
1363 | ||
1364 | for (i = s; *i; i++) | |
1365 | if (!strchr(charset, *i)) | |
1366 | return false; | |
1367 | ||
1368 | return true; | |
1369 | } | |
1370 | ||
4a72ff34 LP |
1371 | char *file_in_same_dir(const char *path, const char *filename) { |
1372 | char *e, *r; | |
1373 | size_t k; | |
1374 | ||
1375 | assert(path); | |
1376 | assert(filename); | |
1377 | ||
1378 | /* This removes the last component of path and appends | |
1379 | * filename, unless the latter is absolute anyway or the | |
1380 | * former isn't */ | |
1381 | ||
1382 | if (path_is_absolute(filename)) | |
1383 | return strdup(filename); | |
1384 | ||
1385 | if (!(e = strrchr(path, '/'))) | |
1386 | return strdup(filename); | |
1387 | ||
1388 | k = strlen(filename); | |
1389 | if (!(r = new(char, e-path+1+k+1))) | |
1390 | return NULL; | |
1391 | ||
1392 | memcpy(r, path, e-path+1); | |
1393 | memcpy(r+(e-path)+1, filename, k+1); | |
1394 | ||
1395 | return r; | |
1396 | } | |
fb624d04 | 1397 | |
c32dd69b LP |
1398 | int rmdir_parents(const char *path, const char *stop) { |
1399 | size_t l; | |
1400 | int r = 0; | |
1401 | ||
1402 | assert(path); | |
1403 | assert(stop); | |
1404 | ||
1405 | l = strlen(path); | |
1406 | ||
1407 | /* Skip trailing slashes */ | |
1408 | while (l > 0 && path[l-1] == '/') | |
1409 | l--; | |
1410 | ||
1411 | while (l > 0) { | |
1412 | char *t; | |
1413 | ||
1414 | /* Skip last component */ | |
1415 | while (l > 0 && path[l-1] != '/') | |
1416 | l--; | |
1417 | ||
1418 | /* Skip trailing slashes */ | |
1419 | while (l > 0 && path[l-1] == '/') | |
1420 | l--; | |
1421 | ||
1422 | if (l <= 0) | |
1423 | break; | |
1424 | ||
1425 | if (!(t = strndup(path, l))) | |
1426 | return -ENOMEM; | |
1427 | ||
1428 | if (path_startswith(stop, t)) { | |
1429 | free(t); | |
1430 | return 0; | |
1431 | } | |
1432 | ||
1433 | r = rmdir(t); | |
1434 | free(t); | |
1435 | ||
1436 | if (r < 0) | |
1437 | if (errno != ENOENT) | |
1438 | return -errno; | |
1439 | } | |
1440 | ||
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | ||
fb624d04 LP |
1445 | char hexchar(int x) { |
1446 | static const char table[16] = "0123456789abcdef"; | |
1447 | ||
1448 | return table[x & 15]; | |
1449 | } | |
4fe88d28 LP |
1450 | |
1451 | int unhexchar(char c) { | |
1452 | ||
1453 | if (c >= '0' && c <= '9') | |
1454 | return c - '0'; | |
1455 | ||
1456 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1457 | return c - 'a' + 10; |
4fe88d28 LP |
1458 | |
1459 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1460 | return c - 'A' + 10; |
4fe88d28 LP |
1461 | |
1462 | return -1; | |
1463 | } | |
1464 | ||
1465 | char octchar(int x) { | |
1466 | return '0' + (x & 7); | |
1467 | } | |
1468 | ||
1469 | int unoctchar(char c) { | |
1470 | ||
1471 | if (c >= '0' && c <= '7') | |
1472 | return c - '0'; | |
1473 | ||
1474 | return -1; | |
1475 | } | |
1476 | ||
5af98f82 LP |
1477 | char decchar(int x) { |
1478 | return '0' + (x % 10); | |
1479 | } | |
1480 | ||
1481 | int undecchar(char c) { | |
1482 | ||
1483 | if (c >= '0' && c <= '9') | |
1484 | return c - '0'; | |
1485 | ||
1486 | return -1; | |
1487 | } | |
1488 | ||
4fe88d28 LP |
1489 | char *cescape(const char *s) { |
1490 | char *r, *t; | |
1491 | const char *f; | |
1492 | ||
1493 | assert(s); | |
1494 | ||
1495 | /* Does C style string escaping. */ | |
1496 | ||
f8e2fb7b LP |
1497 | r = new(char, strlen(s)*4 + 1); |
1498 | if (!r) | |
4fe88d28 LP |
1499 | return NULL; |
1500 | ||
1501 | for (f = s, t = r; *f; f++) | |
1502 | ||
1503 | switch (*f) { | |
1504 | ||
1505 | case '\a': | |
1506 | *(t++) = '\\'; | |
1507 | *(t++) = 'a'; | |
1508 | break; | |
1509 | case '\b': | |
1510 | *(t++) = '\\'; | |
1511 | *(t++) = 'b'; | |
1512 | break; | |
1513 | case '\f': | |
1514 | *(t++) = '\\'; | |
1515 | *(t++) = 'f'; | |
1516 | break; | |
1517 | case '\n': | |
1518 | *(t++) = '\\'; | |
1519 | *(t++) = 'n'; | |
1520 | break; | |
1521 | case '\r': | |
1522 | *(t++) = '\\'; | |
1523 | *(t++) = 'r'; | |
1524 | break; | |
1525 | case '\t': | |
1526 | *(t++) = '\\'; | |
1527 | *(t++) = 't'; | |
1528 | break; | |
1529 | case '\v': | |
1530 | *(t++) = '\\'; | |
1531 | *(t++) = 'v'; | |
1532 | break; | |
1533 | case '\\': | |
1534 | *(t++) = '\\'; | |
1535 | *(t++) = '\\'; | |
1536 | break; | |
1537 | case '"': | |
1538 | *(t++) = '\\'; | |
1539 | *(t++) = '"'; | |
1540 | break; | |
1541 | case '\'': | |
1542 | *(t++) = '\\'; | |
1543 | *(t++) = '\''; | |
1544 | break; | |
1545 | ||
1546 | default: | |
1547 | /* For special chars we prefer octal over | |
1548 | * hexadecimal encoding, simply because glib's | |
1549 | * g_strescape() does the same */ | |
1550 | if ((*f < ' ') || (*f >= 127)) { | |
1551 | *(t++) = '\\'; | |
1552 | *(t++) = octchar((unsigned char) *f >> 6); | |
1553 | *(t++) = octchar((unsigned char) *f >> 3); | |
1554 | *(t++) = octchar((unsigned char) *f); | |
1555 | } else | |
1556 | *(t++) = *f; | |
1557 | break; | |
1558 | } | |
1559 | ||
1560 | *t = 0; | |
1561 | ||
1562 | return r; | |
1563 | } | |
1564 | ||
5b4c61cd | 1565 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1566 | char *r, *t; |
1567 | const char *f; | |
5b4c61cd | 1568 | size_t pl; |
4fe88d28 LP |
1569 | |
1570 | assert(s); | |
1571 | ||
5b4c61cd LP |
1572 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1573 | ||
1574 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1575 | |
5b4c61cd | 1576 | r = new(char, pl+length+1); |
7f110ff9 | 1577 | if (!r) |
4fe88d28 LP |
1578 | return r; |
1579 | ||
5b4c61cd LP |
1580 | if (prefix) |
1581 | memcpy(r, prefix, pl); | |
1582 | ||
1583 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1584 | |
1585 | if (*f != '\\') { | |
1586 | *(t++) = *f; | |
1587 | continue; | |
1588 | } | |
1589 | ||
1590 | f++; | |
1591 | ||
1592 | switch (*f) { | |
1593 | ||
1594 | case 'a': | |
1595 | *(t++) = '\a'; | |
1596 | break; | |
1597 | case 'b': | |
1598 | *(t++) = '\b'; | |
1599 | break; | |
1600 | case 'f': | |
1601 | *(t++) = '\f'; | |
1602 | break; | |
1603 | case 'n': | |
1604 | *(t++) = '\n'; | |
1605 | break; | |
1606 | case 'r': | |
1607 | *(t++) = '\r'; | |
1608 | break; | |
1609 | case 't': | |
1610 | *(t++) = '\t'; | |
1611 | break; | |
1612 | case 'v': | |
1613 | *(t++) = '\v'; | |
1614 | break; | |
1615 | case '\\': | |
1616 | *(t++) = '\\'; | |
1617 | break; | |
1618 | case '"': | |
1619 | *(t++) = '"'; | |
1620 | break; | |
1621 | case '\'': | |
1622 | *(t++) = '\''; | |
1623 | break; | |
1624 | ||
e167fb86 LP |
1625 | case 's': |
1626 | /* This is an extension of the XDG syntax files */ | |
1627 | *(t++) = ' '; | |
1628 | break; | |
1629 | ||
4fe88d28 LP |
1630 | case 'x': { |
1631 | /* hexadecimal encoding */ | |
1632 | int a, b; | |
1633 | ||
7f110ff9 LP |
1634 | a = unhexchar(f[1]); |
1635 | b = unhexchar(f[2]); | |
1636 | ||
1637 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1638 | /* Invalid escape code, let's take it literal then */ |
1639 | *(t++) = '\\'; | |
1640 | *(t++) = 'x'; | |
1641 | } else { | |
1642 | *(t++) = (char) ((a << 4) | b); | |
1643 | f += 2; | |
1644 | } | |
1645 | ||
1646 | break; | |
1647 | } | |
1648 | ||
1649 | case '0': | |
1650 | case '1': | |
1651 | case '2': | |
1652 | case '3': | |
1653 | case '4': | |
1654 | case '5': | |
1655 | case '6': | |
1656 | case '7': { | |
1657 | /* octal encoding */ | |
1658 | int a, b, c; | |
1659 | ||
7f110ff9 LP |
1660 | a = unoctchar(f[0]); |
1661 | b = unoctchar(f[1]); | |
1662 | c = unoctchar(f[2]); | |
1663 | ||
1664 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1665 | /* Invalid escape code, let's take it literal then */ |
1666 | *(t++) = '\\'; | |
1667 | *(t++) = f[0]; | |
1668 | } else { | |
1669 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1670 | f += 2; | |
1671 | } | |
1672 | ||
1673 | break; | |
1674 | } | |
1675 | ||
1676 | case 0: | |
1677 | /* premature end of string.*/ | |
1678 | *(t++) = '\\'; | |
1679 | goto finish; | |
1680 | ||
1681 | default: | |
1682 | /* Invalid escape code, let's take it literal then */ | |
1683 | *(t++) = '\\'; | |
f3d4cc01 | 1684 | *(t++) = *f; |
4fe88d28 LP |
1685 | break; |
1686 | } | |
1687 | } | |
1688 | ||
1689 | finish: | |
1690 | *t = 0; | |
1691 | return r; | |
1692 | } | |
1693 | ||
5b4c61cd LP |
1694 | char *cunescape_length(const char *s, size_t length) { |
1695 | return cunescape_length_with_prefix(s, length, NULL); | |
1696 | } | |
1697 | ||
6febfd0d | 1698 | char *cunescape(const char *s) { |
5b4c61cd LP |
1699 | assert(s); |
1700 | ||
6febfd0d LP |
1701 | return cunescape_length(s, strlen(s)); |
1702 | } | |
4fe88d28 LP |
1703 | |
1704 | char *xescape(const char *s, const char *bad) { | |
1705 | char *r, *t; | |
1706 | const char *f; | |
1707 | ||
1708 | /* Escapes all chars in bad, in addition to \ and all special | |
1709 | * chars, in \xFF style escaping. May be reversed with | |
1710 | * cunescape. */ | |
1711 | ||
1712 | if (!(r = new(char, strlen(s)*4+1))) | |
1713 | return NULL; | |
1714 | ||
1715 | for (f = s, t = r; *f; f++) { | |
1716 | ||
b866264a LP |
1717 | if ((*f < ' ') || (*f >= 127) || |
1718 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1719 | *(t++) = '\\'; |
1720 | *(t++) = 'x'; | |
1721 | *(t++) = hexchar(*f >> 4); | |
1722 | *(t++) = hexchar(*f); | |
1723 | } else | |
1724 | *(t++) = *f; | |
1725 | } | |
1726 | ||
1727 | *t = 0; | |
1728 | ||
1729 | return r; | |
1730 | } | |
1731 | ||
ea430986 | 1732 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1733 | char *r, *t; |
1734 | const char *f; | |
1735 | ||
47be870b LP |
1736 | assert(s); |
1737 | ||
ea430986 LP |
1738 | /* Escapes all chars that D-Bus' object path cannot deal |
1739 | * with. Can be reverse with bus_path_unescape() */ | |
1740 | ||
1741 | if (!(r = new(char, strlen(s)*3+1))) | |
1742 | return NULL; | |
1743 | ||
1744 | for (f = s, t = r; *f; f++) { | |
1745 | ||
1746 | if (!(*f >= 'A' && *f <= 'Z') && | |
1747 | !(*f >= 'a' && *f <= 'z') && | |
1748 | !(*f >= '0' && *f <= '9')) { | |
1749 | *(t++) = '_'; | |
1750 | *(t++) = hexchar(*f >> 4); | |
1751 | *(t++) = hexchar(*f); | |
1752 | } else | |
1753 | *(t++) = *f; | |
1754 | } | |
1755 | ||
1756 | *t = 0; | |
1757 | ||
1758 | return r; | |
1759 | } | |
1760 | ||
9e2f7c11 | 1761 | char *bus_path_unescape(const char *f) { |
ea430986 | 1762 | char *r, *t; |
ea430986 | 1763 | |
9e2f7c11 | 1764 | assert(f); |
47be870b | 1765 | |
9e2f7c11 | 1766 | if (!(r = strdup(f))) |
ea430986 LP |
1767 | return NULL; |
1768 | ||
9e2f7c11 | 1769 | for (t = r; *f; f++) { |
ea430986 LP |
1770 | |
1771 | if (*f == '_') { | |
1772 | int a, b; | |
1773 | ||
1774 | if ((a = unhexchar(f[1])) < 0 || | |
1775 | (b = unhexchar(f[2])) < 0) { | |
1776 | /* Invalid escape code, let's take it literal then */ | |
1777 | *(t++) = '_'; | |
1778 | } else { | |
1779 | *(t++) = (char) ((a << 4) | b); | |
1780 | f += 2; | |
1781 | } | |
1782 | } else | |
1783 | *(t++) = *f; | |
1784 | } | |
1785 | ||
1786 | *t = 0; | |
1787 | ||
1788 | return r; | |
1789 | } | |
1790 | ||
67d51650 | 1791 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1792 | char *p; |
1793 | ||
67d51650 | 1794 | assert(t); |
4fe88d28 | 1795 | |
67d51650 | 1796 | for (p = t; *p; p++) |
4fe88d28 LP |
1797 | if (*p >= 'A' && *p <= 'Z') |
1798 | *p = *p - 'A' + 'a'; | |
1799 | ||
67d51650 | 1800 | return t; |
4fe88d28 | 1801 | } |
1dccbe19 | 1802 | |
a228a22f | 1803 | static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1804 | assert(filename); |
1805 | ||
1806 | return | |
1807 | filename[0] == '.' || | |
6c78be3c | 1808 | streq(filename, "lost+found") || |
e472d476 LP |
1809 | streq(filename, "aquota.user") || |
1810 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1811 | endswith(filename, ".rpmnew") || |
1812 | endswith(filename, ".rpmsave") || | |
1813 | endswith(filename, ".rpmorig") || | |
1814 | endswith(filename, ".dpkg-old") || | |
1815 | endswith(filename, ".dpkg-new") || | |
1816 | endswith(filename, ".swp"); | |
1817 | } | |
1818 | ||
a228a22f LP |
1819 | bool ignore_file(const char *filename) { |
1820 | assert(filename); | |
1821 | ||
1822 | if (endswith(filename, "~")) | |
1823 | return false; | |
1824 | ||
1825 | return ignore_file_allow_backup(filename); | |
1826 | } | |
1827 | ||
3a0ecb08 LP |
1828 | int fd_nonblock(int fd, bool nonblock) { |
1829 | int flags; | |
1830 | ||
1831 | assert(fd >= 0); | |
1832 | ||
1833 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1834 | return -errno; | |
1835 | ||
1836 | if (nonblock) | |
1837 | flags |= O_NONBLOCK; | |
1838 | else | |
1839 | flags &= ~O_NONBLOCK; | |
1840 | ||
1841 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1842 | return -errno; | |
1843 | ||
1844 | return 0; | |
1845 | } | |
1846 | ||
1847 | int fd_cloexec(int fd, bool cloexec) { | |
1848 | int flags; | |
1849 | ||
1850 | assert(fd >= 0); | |
1851 | ||
1852 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1853 | return -errno; | |
1854 | ||
1855 | if (cloexec) | |
1856 | flags |= FD_CLOEXEC; | |
1857 | else | |
1858 | flags &= ~FD_CLOEXEC; | |
1859 | ||
1860 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1861 | return -errno; | |
1862 | ||
1863 | return 0; | |
1864 | } | |
1865 | ||
b19be9eb LP |
1866 | static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
1867 | unsigned i; | |
1868 | ||
1869 | assert(n_fdset == 0 || fdset); | |
1870 | ||
1871 | for (i = 0; i < n_fdset; i++) | |
1872 | if (fdset[i] == fd) | |
1873 | return true; | |
1874 | ||
1875 | return false; | |
1876 | } | |
1877 | ||
a0d40ac5 LP |
1878 | int close_all_fds(const int except[], unsigned n_except) { |
1879 | DIR *d; | |
1880 | struct dirent *de; | |
1881 | int r = 0; | |
1882 | ||
b19be9eb LP |
1883 | assert(n_except == 0 || except); |
1884 | ||
1885 | d = opendir("/proc/self/fd"); | |
1886 | if (!d) { | |
1887 | int fd; | |
1888 | struct rlimit rl; | |
1889 | ||
1890 | /* When /proc isn't available (for example in chroots) | |
1891 | * the fallback is brute forcing through the fd | |
1892 | * table */ | |
1893 | ||
1894 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1895 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1896 | ||
1897 | if (fd_in_set(fd, except, n_except)) | |
1898 | continue; | |
1899 | ||
1900 | if (close_nointr(fd) < 0) | |
1901 | if (errno != EBADF && r == 0) | |
1902 | r = -errno; | |
1903 | } | |
1904 | ||
1905 | return r; | |
1906 | } | |
a0d40ac5 LP |
1907 | |
1908 | while ((de = readdir(d))) { | |
a7610064 | 1909 | int fd = -1; |
a0d40ac5 | 1910 | |
a16e1123 | 1911 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1912 | continue; |
1913 | ||
720ce21d LP |
1914 | if (safe_atoi(de->d_name, &fd) < 0) |
1915 | /* Let's better ignore this, just in case */ | |
1916 | continue; | |
a0d40ac5 LP |
1917 | |
1918 | if (fd < 3) | |
1919 | continue; | |
1920 | ||
1921 | if (fd == dirfd(d)) | |
1922 | continue; | |
1923 | ||
b19be9eb LP |
1924 | if (fd_in_set(fd, except, n_except)) |
1925 | continue; | |
a0d40ac5 | 1926 | |
720ce21d | 1927 | if (close_nointr(fd) < 0) { |
2f357920 | 1928 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1929 | if (errno != EBADF && r == 0) |
1930 | r = -errno; | |
2f357920 | 1931 | } |
a0d40ac5 LP |
1932 | } |
1933 | ||
a0d40ac5 LP |
1934 | closedir(d); |
1935 | return r; | |
1936 | } | |
1937 | ||
db12775d LP |
1938 | bool chars_intersect(const char *a, const char *b) { |
1939 | const char *p; | |
1940 | ||
1941 | /* Returns true if any of the chars in a are in b. */ | |
1942 | for (p = a; *p; p++) | |
1943 | if (strchr(b, *p)) | |
1944 | return true; | |
1945 | ||
1946 | return false; | |
1947 | } | |
1948 | ||
8b6c7120 LP |
1949 | char *format_timestamp(char *buf, size_t l, usec_t t) { |
1950 | struct tm tm; | |
1951 | time_t sec; | |
1952 | ||
1953 | assert(buf); | |
1954 | assert(l > 0); | |
1955 | ||
1956 | if (t <= 0) | |
1957 | return NULL; | |
1958 | ||
f872ec33 | 1959 | sec = (time_t) (t / USEC_PER_SEC); |
8b6c7120 LP |
1960 | |
1961 | if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0) | |
1962 | return NULL; | |
1963 | ||
1964 | return buf; | |
1965 | } | |
1966 | ||
584be568 LP |
1967 | char *format_timestamp_pretty(char *buf, size_t l, usec_t t) { |
1968 | usec_t n, d; | |
1969 | ||
1970 | n = now(CLOCK_REALTIME); | |
1971 | ||
1972 | if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) | |
1973 | return NULL; | |
1974 | ||
1975 | d = n - t; | |
1976 | ||
1977 | if (d >= USEC_PER_YEAR) | |
1978 | snprintf(buf, l, "%llu years and %llu months ago", | |
1979 | (unsigned long long) (d / USEC_PER_YEAR), | |
1980 | (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); | |
1981 | else if (d >= USEC_PER_MONTH) | |
1982 | snprintf(buf, l, "%llu months and %llu days ago", | |
1983 | (unsigned long long) (d / USEC_PER_MONTH), | |
1984 | (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); | |
1985 | else if (d >= USEC_PER_WEEK) | |
1986 | snprintf(buf, l, "%llu weeks and %llu days ago", | |
1987 | (unsigned long long) (d / USEC_PER_WEEK), | |
1988 | (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); | |
1989 | else if (d >= 2*USEC_PER_DAY) | |
1990 | snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); | |
1991 | else if (d >= 25*USEC_PER_HOUR) | |
1992 | snprintf(buf, l, "1 day and %lluh ago", | |
1993 | (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); | |
1994 | else if (d >= 6*USEC_PER_HOUR) | |
1995 | snprintf(buf, l, "%lluh ago", | |
1996 | (unsigned long long) (d / USEC_PER_HOUR)); | |
1997 | else if (d >= USEC_PER_HOUR) | |
1998 | snprintf(buf, l, "%lluh %llumin ago", | |
1999 | (unsigned long long) (d / USEC_PER_HOUR), | |
2000 | (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); | |
2001 | else if (d >= 5*USEC_PER_MINUTE) | |
2002 | snprintf(buf, l, "%llumin ago", | |
2003 | (unsigned long long) (d / USEC_PER_MINUTE)); | |
2004 | else if (d >= USEC_PER_MINUTE) | |
2005 | snprintf(buf, l, "%llumin %llus ago", | |
2006 | (unsigned long long) (d / USEC_PER_MINUTE), | |
2007 | (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); | |
2008 | else if (d >= USEC_PER_SEC) | |
2009 | snprintf(buf, l, "%llus ago", | |
2010 | (unsigned long long) (d / USEC_PER_SEC)); | |
2011 | else if (d >= USEC_PER_MSEC) | |
2012 | snprintf(buf, l, "%llums ago", | |
2013 | (unsigned long long) (d / USEC_PER_MSEC)); | |
2014 | else if (d > 0) | |
2015 | snprintf(buf, l, "%lluus ago", | |
2016 | (unsigned long long) d); | |
2017 | else | |
2018 | snprintf(buf, l, "now"); | |
2019 | ||
2020 | buf[l-1] = 0; | |
2021 | return buf; | |
2022 | } | |
2023 | ||
871d7de4 LP |
2024 | char *format_timespan(char *buf, size_t l, usec_t t) { |
2025 | static const struct { | |
2026 | const char *suffix; | |
2027 | usec_t usec; | |
2028 | } table[] = { | |
2029 | { "w", USEC_PER_WEEK }, | |
2030 | { "d", USEC_PER_DAY }, | |
2031 | { "h", USEC_PER_HOUR }, | |
2032 | { "min", USEC_PER_MINUTE }, | |
2033 | { "s", USEC_PER_SEC }, | |
2034 | { "ms", USEC_PER_MSEC }, | |
2035 | { "us", 1 }, | |
2036 | }; | |
2037 | ||
2038 | unsigned i; | |
2039 | char *p = buf; | |
2040 | ||
2041 | assert(buf); | |
2042 | assert(l > 0); | |
2043 | ||
2044 | if (t == (usec_t) -1) | |
2045 | return NULL; | |
2046 | ||
4502d22c LP |
2047 | if (t == 0) { |
2048 | snprintf(p, l, "0"); | |
2049 | p[l-1] = 0; | |
2050 | return p; | |
2051 | } | |
2052 | ||
871d7de4 LP |
2053 | /* The result of this function can be parsed with parse_usec */ |
2054 | ||
2055 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
2056 | int k; | |
2057 | size_t n; | |
2058 | ||
2059 | if (t < table[i].usec) | |
2060 | continue; | |
2061 | ||
2062 | if (l <= 1) | |
2063 | break; | |
2064 | ||
2065 | k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix); | |
2066 | n = MIN((size_t) k, l); | |
2067 | ||
2068 | l -= n; | |
2069 | p += n; | |
2070 | ||
2071 | t %= table[i].usec; | |
2072 | } | |
2073 | ||
2074 | *p = 0; | |
2075 | ||
2076 | return buf; | |
2077 | } | |
2078 | ||
42856c10 LP |
2079 | bool fstype_is_network(const char *fstype) { |
2080 | static const char * const table[] = { | |
2081 | "cifs", | |
2082 | "smbfs", | |
2083 | "ncpfs", | |
2084 | "nfs", | |
ca139f94 LP |
2085 | "nfs4", |
2086 | "gfs", | |
2087 | "gfs2" | |
42856c10 LP |
2088 | }; |
2089 | ||
2090 | unsigned i; | |
2091 | ||
2092 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2093 | if (streq(table[i], fstype)) | |
2094 | return true; | |
2095 | ||
2096 | return false; | |
2097 | } | |
2098 | ||
601f6a1e LP |
2099 | int chvt(int vt) { |
2100 | int fd, r = 0; | |
2101 | ||
74bc3bdc | 2102 | if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) |
601f6a1e LP |
2103 | return -errno; |
2104 | ||
2105 | if (vt < 0) { | |
2106 | int tiocl[2] = { | |
2107 | TIOCL_GETKMSGREDIRECT, | |
2108 | 0 | |
2109 | }; | |
2110 | ||
678abaf9 TJ |
2111 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) { |
2112 | r = -errno; | |
2113 | goto fail; | |
2114 | } | |
601f6a1e LP |
2115 | |
2116 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
2117 | } | |
2118 | ||
2119 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
2120 | r = -errno; | |
2121 | ||
678abaf9 TJ |
2122 | fail: |
2123 | close_nointr_nofail(fd); | |
601f6a1e LP |
2124 | return r; |
2125 | } | |
2126 | ||
8f2d43a0 | 2127 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
2128 | struct termios old_termios, new_termios; |
2129 | char c; | |
20c03b7b | 2130 | char line[LINE_MAX]; |
80876c20 LP |
2131 | |
2132 | assert(f); | |
2133 | assert(ret); | |
2134 | ||
2135 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
2136 | new_termios = old_termios; | |
2137 | ||
2138 | new_termios.c_lflag &= ~ICANON; | |
2139 | new_termios.c_cc[VMIN] = 1; | |
2140 | new_termios.c_cc[VTIME] = 0; | |
2141 | ||
2142 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
2143 | size_t k; | |
2144 | ||
8f2d43a0 LP |
2145 | if (t != (usec_t) -1) { |
2146 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
2147 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2148 | return -ETIMEDOUT; | |
2149 | } | |
2150 | } | |
2151 | ||
80876c20 LP |
2152 | k = fread(&c, 1, 1, f); |
2153 | ||
2154 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2155 | ||
2156 | if (k <= 0) | |
2157 | return -EIO; | |
2158 | ||
2159 | if (need_nl) | |
2160 | *need_nl = c != '\n'; | |
2161 | ||
2162 | *ret = c; | |
2163 | return 0; | |
2164 | } | |
2165 | } | |
2166 | ||
8f2d43a0 LP |
2167 | if (t != (usec_t) -1) |
2168 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
2169 | return -ETIMEDOUT; | |
2170 | ||
2171 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
2172 | return -EIO; |
2173 | ||
2174 | truncate_nl(line); | |
2175 | ||
2176 | if (strlen(line) != 1) | |
2177 | return -EBADMSG; | |
2178 | ||
2179 | if (need_nl) | |
2180 | *need_nl = false; | |
2181 | ||
2182 | *ret = line[0]; | |
2183 | return 0; | |
2184 | } | |
2185 | ||
2186 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 LP |
2187 | bool on_tty; |
2188 | ||
80876c20 LP |
2189 | assert(ret); |
2190 | assert(replies); | |
2191 | assert(text); | |
2192 | ||
1b39d4b9 LP |
2193 | on_tty = isatty(STDOUT_FILENO); |
2194 | ||
80876c20 LP |
2195 | for (;;) { |
2196 | va_list ap; | |
2197 | char c; | |
2198 | int r; | |
2199 | bool need_nl = true; | |
2200 | ||
1b39d4b9 | 2201 | if (on_tty) |
c1072ea0 | 2202 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 2203 | |
80876c20 LP |
2204 | va_start(ap, text); |
2205 | vprintf(text, ap); | |
2206 | va_end(ap); | |
2207 | ||
1b39d4b9 | 2208 | if (on_tty) |
c1072ea0 | 2209 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 2210 | |
80876c20 LP |
2211 | fflush(stdout); |
2212 | ||
8f2d43a0 LP |
2213 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
2214 | if (r < 0) { | |
80876c20 LP |
2215 | |
2216 | if (r == -EBADMSG) { | |
2217 | puts("Bad input, please try again."); | |
2218 | continue; | |
2219 | } | |
2220 | ||
2221 | putchar('\n'); | |
2222 | return r; | |
2223 | } | |
2224 | ||
2225 | if (need_nl) | |
2226 | putchar('\n'); | |
2227 | ||
2228 | if (strchr(replies, c)) { | |
2229 | *ret = c; | |
2230 | return 0; | |
2231 | } | |
2232 | ||
2233 | puts("Read unexpected character, please try again."); | |
2234 | } | |
2235 | } | |
2236 | ||
512947d4 | 2237 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
2238 | struct termios termios; |
2239 | int r = 0; | |
3fe5e5d4 LP |
2240 | |
2241 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
2242 | |
2243 | assert(fd >= 0); | |
2244 | ||
eed1d0e3 LP |
2245 | /* We leave locked terminal attributes untouched, so that |
2246 | * Plymouth may set whatever it wants to set, and we don't | |
2247 | * interfere with that. */ | |
3fe5e5d4 LP |
2248 | |
2249 | /* Disable exclusive mode, just in case */ | |
2250 | ioctl(fd, TIOCNXCL); | |
2251 | ||
5c0100a5 | 2252 | /* Switch to text mode */ |
512947d4 MS |
2253 | if (switch_to_text) |
2254 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 2255 | |
3fe5e5d4 | 2256 | /* Enable console unicode mode */ |
df465b3f | 2257 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
2258 | |
2259 | if (tcgetattr(fd, &termios) < 0) { | |
2260 | r = -errno; | |
2261 | goto finish; | |
2262 | } | |
2263 | ||
aaf694ca LP |
2264 | /* We only reset the stuff that matters to the software. How |
2265 | * hardware is set up we don't touch assuming that somebody | |
2266 | * else will do that for us */ | |
2267 | ||
2268 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
2269 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
2270 | termios.c_oflag |= ONLCR; | |
2271 | termios.c_cflag |= CREAD; | |
2272 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
2273 | ||
2274 | termios.c_cc[VINTR] = 03; /* ^C */ | |
2275 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
2276 | termios.c_cc[VERASE] = 0177; | |
2277 | termios.c_cc[VKILL] = 025; /* ^X */ | |
2278 | termios.c_cc[VEOF] = 04; /* ^D */ | |
2279 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
2280 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
2281 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
2282 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
2283 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
2284 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
2285 | termios.c_cc[VEOL] = 0; |
2286 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
2287 | |
2288 | termios.c_cc[VTIME] = 0; | |
2289 | termios.c_cc[VMIN] = 1; | |
2290 | ||
2291 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
2292 | r = -errno; | |
2293 | ||
2294 | finish: | |
2295 | /* Just in case, flush all crap out */ | |
2296 | tcflush(fd, TCIOFLUSH); | |
2297 | ||
2298 | return r; | |
2299 | } | |
2300 | ||
6ea832a2 LP |
2301 | int reset_terminal(const char *name) { |
2302 | int fd, r; | |
2303 | ||
2304 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
2305 | if (fd < 0) | |
2306 | return fd; | |
2307 | ||
512947d4 | 2308 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
2309 | close_nointr_nofail(fd); |
2310 | ||
2311 | return r; | |
2312 | } | |
2313 | ||
80876c20 LP |
2314 | int open_terminal(const char *name, int mode) { |
2315 | int fd, r; | |
f73f76ac | 2316 | unsigned c = 0; |
80876c20 | 2317 | |
f73f76ac LP |
2318 | /* |
2319 | * If a TTY is in the process of being closed opening it might | |
2320 | * cause EIO. This is horribly awful, but unlikely to be | |
2321 | * changed in the kernel. Hence we work around this problem by | |
2322 | * retrying a couple of times. | |
2323 | * | |
2324 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
2325 | */ | |
2326 | ||
2327 | for (;;) { | |
af6da548 LP |
2328 | fd = open(name, mode); |
2329 | if (fd >= 0) | |
f73f76ac LP |
2330 | break; |
2331 | ||
2332 | if (errno != EIO) | |
2333 | return -errno; | |
2334 | ||
af6da548 | 2335 | /* Max 1s in total */ |
f73f76ac LP |
2336 | if (c >= 20) |
2337 | return -errno; | |
2338 | ||
2339 | usleep(50 * USEC_PER_MSEC); | |
2340 | c++; | |
2341 | } | |
2342 | ||
2343 | if (fd < 0) | |
80876c20 LP |
2344 | return -errno; |
2345 | ||
af6da548 LP |
2346 | r = isatty(fd); |
2347 | if (r < 0) { | |
80876c20 LP |
2348 | close_nointr_nofail(fd); |
2349 | return -errno; | |
2350 | } | |
2351 | ||
2352 | if (!r) { | |
2353 | close_nointr_nofail(fd); | |
2354 | return -ENOTTY; | |
2355 | } | |
2356 | ||
2357 | return fd; | |
2358 | } | |
2359 | ||
2360 | int flush_fd(int fd) { | |
2361 | struct pollfd pollfd; | |
2362 | ||
2363 | zero(pollfd); | |
2364 | pollfd.fd = fd; | |
2365 | pollfd.events = POLLIN; | |
2366 | ||
2367 | for (;;) { | |
20c03b7b | 2368 | char buf[LINE_MAX]; |
80876c20 LP |
2369 | ssize_t l; |
2370 | int r; | |
2371 | ||
2372 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2373 | ||
2374 | if (errno == EINTR) | |
2375 | continue; | |
2376 | ||
2377 | return -errno; | |
2378 | } | |
2379 | ||
2380 | if (r == 0) | |
2381 | return 0; | |
2382 | ||
2383 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2384 | ||
2385 | if (errno == EINTR) | |
2386 | continue; | |
2387 | ||
2388 | if (errno == EAGAIN) | |
2389 | return 0; | |
2390 | ||
2391 | return -errno; | |
2392 | } | |
2393 | ||
2394 | if (l <= 0) | |
2395 | return 0; | |
2396 | } | |
2397 | } | |
2398 | ||
af6da548 LP |
2399 | int acquire_terminal( |
2400 | const char *name, | |
2401 | bool fail, | |
2402 | bool force, | |
2403 | bool ignore_tiocstty_eperm, | |
2404 | usec_t timeout) { | |
2405 | ||
4a0ff478 | 2406 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 2407 | usec_t ts = 0; |
32c4bef8 | 2408 | struct sigaction sa_old, sa_new; |
80876c20 LP |
2409 | |
2410 | assert(name); | |
2411 | ||
2412 | /* We use inotify to be notified when the tty is closed. We | |
2413 | * create the watch before checking if we can actually acquire | |
2414 | * it, so that we don't lose any event. | |
2415 | * | |
2416 | * Note: strictly speaking this actually watches for the | |
2417 | * device being closed, it does *not* really watch whether a | |
2418 | * tty loses its controlling process. However, unless some | |
2419 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2420 | * its tty otherwise this will not become a problem. As long | |
2421 | * as the administrator makes sure not configure any service | |
2422 | * on the same tty as an untrusted user this should not be a | |
2423 | * problem. (Which he probably should not do anyway.) */ | |
2424 | ||
af6da548 LP |
2425 | if (timeout != (usec_t) -1) |
2426 | ts = now(CLOCK_MONOTONIC); | |
2427 | ||
80876c20 | 2428 | if (!fail && !force) { |
af6da548 LP |
2429 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
2430 | if (notify < 0) { | |
80876c20 LP |
2431 | r = -errno; |
2432 | goto fail; | |
2433 | } | |
2434 | ||
af6da548 LP |
2435 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
2436 | if (wd < 0) { | |
80876c20 LP |
2437 | r = -errno; |
2438 | goto fail; | |
2439 | } | |
2440 | } | |
2441 | ||
2442 | for (;;) { | |
af6da548 LP |
2443 | if (notify >= 0) { |
2444 | r = flush_fd(notify); | |
2445 | if (r < 0) | |
e3d1855b | 2446 | goto fail; |
af6da548 | 2447 | } |
80876c20 LP |
2448 | |
2449 | /* We pass here O_NOCTTY only so that we can check the return | |
2450 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2451 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
2452 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
2453 | if (fd < 0) | |
6ea832a2 | 2454 | return fd; |
80876c20 | 2455 | |
32c4bef8 LP |
2456 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2457 | * if we already own the tty. */ | |
2458 | zero(sa_new); | |
2459 | sa_new.sa_handler = SIG_IGN; | |
2460 | sa_new.sa_flags = SA_RESTART; | |
2461 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2462 | ||
80876c20 | 2463 | /* First, try to get the tty */ |
32c4bef8 LP |
2464 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
2465 | r = -errno; | |
2466 | ||
2467 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
2468 | |
2469 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2470 | * returning EPERM, i.e. when very likely we already | |
2471 | * are have this controlling terminal. */ | |
32c4bef8 | 2472 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
2473 | r = 0; |
2474 | ||
32c4bef8 | 2475 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
2476 | goto fail; |
2477 | } | |
2478 | ||
2479 | if (r >= 0) | |
2480 | break; | |
2481 | ||
2482 | assert(!fail); | |
2483 | assert(!force); | |
2484 | assert(notify >= 0); | |
2485 | ||
2486 | for (;;) { | |
f601daa7 | 2487 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 2488 | ssize_t l; |
f601daa7 | 2489 | struct inotify_event *e; |
80876c20 | 2490 | |
af6da548 LP |
2491 | if (timeout != (usec_t) -1) { |
2492 | usec_t n; | |
2493 | ||
2494 | n = now(CLOCK_MONOTONIC); | |
2495 | if (ts + timeout < n) { | |
2496 | r = -ETIMEDOUT; | |
2497 | goto fail; | |
2498 | } | |
2499 | ||
2500 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
2501 | if (r < 0) | |
2502 | goto fail; | |
2503 | ||
2504 | if (r == 0) { | |
2505 | r = -ETIMEDOUT; | |
2506 | goto fail; | |
2507 | } | |
2508 | } | |
2509 | ||
2510 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
2511 | if (l < 0) { | |
80876c20 | 2512 | |
af6da548 | 2513 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
2514 | continue; |
2515 | ||
2516 | r = -errno; | |
2517 | goto fail; | |
2518 | } | |
2519 | ||
2520 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2521 | |
f601daa7 LP |
2522 | while (l > 0) { |
2523 | size_t step; | |
80876c20 | 2524 | |
f601daa7 | 2525 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2526 | r = -EIO; |
f601daa7 LP |
2527 | goto fail; |
2528 | } | |
80876c20 | 2529 | |
f601daa7 LP |
2530 | step = sizeof(struct inotify_event) + e->len; |
2531 | assert(step <= (size_t) l); | |
80876c20 | 2532 | |
f601daa7 LP |
2533 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2534 | l -= step; | |
80876c20 LP |
2535 | } |
2536 | ||
2537 | break; | |
2538 | } | |
2539 | ||
2540 | /* We close the tty fd here since if the old session | |
2541 | * ended our handle will be dead. It's important that | |
2542 | * we do this after sleeping, so that we don't enter | |
2543 | * an endless loop. */ | |
2544 | close_nointr_nofail(fd); | |
2545 | } | |
2546 | ||
2547 | if (notify >= 0) | |
a16e1123 | 2548 | close_nointr_nofail(notify); |
80876c20 | 2549 | |
512947d4 MS |
2550 | r = reset_terminal_fd(fd, true); |
2551 | if (r < 0) | |
80876c20 LP |
2552 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2553 | ||
2554 | return fd; | |
2555 | ||
2556 | fail: | |
2557 | if (fd >= 0) | |
a16e1123 | 2558 | close_nointr_nofail(fd); |
80876c20 LP |
2559 | |
2560 | if (notify >= 0) | |
a16e1123 | 2561 | close_nointr_nofail(notify); |
80876c20 LP |
2562 | |
2563 | return r; | |
2564 | } | |
2565 | ||
2566 | int release_terminal(void) { | |
2567 | int r = 0, fd; | |
57cd2192 | 2568 | struct sigaction sa_old, sa_new; |
80876c20 | 2569 | |
ccaa6149 | 2570 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0) |
80876c20 LP |
2571 | return -errno; |
2572 | ||
57cd2192 LP |
2573 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2574 | * by our own TIOCNOTTY */ | |
2575 | ||
2576 | zero(sa_new); | |
2577 | sa_new.sa_handler = SIG_IGN; | |
2578 | sa_new.sa_flags = SA_RESTART; | |
2579 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2580 | ||
80876c20 LP |
2581 | if (ioctl(fd, TIOCNOTTY) < 0) |
2582 | r = -errno; | |
2583 | ||
57cd2192 LP |
2584 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2585 | ||
80876c20 LP |
2586 | close_nointr_nofail(fd); |
2587 | return r; | |
2588 | } | |
2589 | ||
9a34ec5f LP |
2590 | int sigaction_many(const struct sigaction *sa, ...) { |
2591 | va_list ap; | |
2592 | int r = 0, sig; | |
2593 | ||
2594 | va_start(ap, sa); | |
2595 | while ((sig = va_arg(ap, int)) > 0) | |
2596 | if (sigaction(sig, sa, NULL) < 0) | |
2597 | r = -errno; | |
2598 | va_end(ap); | |
2599 | ||
2600 | return r; | |
2601 | } | |
2602 | ||
2603 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2604 | struct sigaction sa; |
9a34ec5f LP |
2605 | va_list ap; |
2606 | int r = 0; | |
a337c6fc LP |
2607 | |
2608 | zero(sa); | |
2609 | sa.sa_handler = SIG_IGN; | |
2610 | sa.sa_flags = SA_RESTART; | |
2611 | ||
9a34ec5f LP |
2612 | if (sigaction(sig, &sa, NULL) < 0) |
2613 | r = -errno; | |
2614 | ||
2615 | va_start(ap, sig); | |
2616 | while ((sig = va_arg(ap, int)) > 0) | |
2617 | if (sigaction(sig, &sa, NULL) < 0) | |
2618 | r = -errno; | |
2619 | va_end(ap); | |
2620 | ||
2621 | return r; | |
2622 | } | |
2623 | ||
2624 | int default_signals(int sig, ...) { | |
2625 | struct sigaction sa; | |
2626 | va_list ap; | |
2627 | int r = 0; | |
2628 | ||
2629 | zero(sa); | |
2630 | sa.sa_handler = SIG_DFL; | |
2631 | sa.sa_flags = SA_RESTART; | |
2632 | ||
2633 | if (sigaction(sig, &sa, NULL) < 0) | |
2634 | r = -errno; | |
2635 | ||
2636 | va_start(ap, sig); | |
2637 | while ((sig = va_arg(ap, int)) > 0) | |
2638 | if (sigaction(sig, &sa, NULL) < 0) | |
2639 | r = -errno; | |
2640 | va_end(ap); | |
2641 | ||
2642 | return r; | |
a337c6fc LP |
2643 | } |
2644 | ||
8d567588 LP |
2645 | int close_pipe(int p[]) { |
2646 | int a = 0, b = 0; | |
2647 | ||
2648 | assert(p); | |
2649 | ||
2650 | if (p[0] >= 0) { | |
2651 | a = close_nointr(p[0]); | |
2652 | p[0] = -1; | |
2653 | } | |
2654 | ||
2655 | if (p[1] >= 0) { | |
2656 | b = close_nointr(p[1]); | |
2657 | p[1] = -1; | |
2658 | } | |
2659 | ||
2660 | return a < 0 ? a : b; | |
2661 | } | |
2662 | ||
eb22ac37 | 2663 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2664 | uint8_t *p; |
2665 | ssize_t n = 0; | |
2666 | ||
2667 | assert(fd >= 0); | |
2668 | assert(buf); | |
2669 | ||
2670 | p = buf; | |
2671 | ||
2672 | while (nbytes > 0) { | |
2673 | ssize_t k; | |
2674 | ||
2675 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2676 | ||
eb22ac37 | 2677 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2678 | continue; |
2679 | ||
eb22ac37 | 2680 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2681 | struct pollfd pollfd; |
2682 | ||
2683 | zero(pollfd); | |
2684 | pollfd.fd = fd; | |
2685 | pollfd.events = POLLIN; | |
2686 | ||
2687 | if (poll(&pollfd, 1, -1) < 0) { | |
2688 | if (errno == EINTR) | |
2689 | continue; | |
2690 | ||
2691 | return n > 0 ? n : -errno; | |
2692 | } | |
2693 | ||
2694 | if (pollfd.revents != POLLIN) | |
2695 | return n > 0 ? n : -EIO; | |
2696 | ||
2697 | continue; | |
2698 | } | |
2699 | ||
2700 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2701 | } | |
2702 | ||
2703 | p += k; | |
2704 | nbytes -= k; | |
2705 | n += k; | |
2706 | } | |
2707 | ||
2708 | return n; | |
2709 | } | |
2710 | ||
eb22ac37 LP |
2711 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2712 | const uint8_t *p; | |
2713 | ssize_t n = 0; | |
2714 | ||
2715 | assert(fd >= 0); | |
2716 | assert(buf); | |
2717 | ||
2718 | p = buf; | |
2719 | ||
2720 | while (nbytes > 0) { | |
2721 | ssize_t k; | |
2722 | ||
fe652127 LP |
2723 | k = write(fd, p, nbytes); |
2724 | if (k <= 0) { | |
eb22ac37 LP |
2725 | |
2726 | if (k < 0 && errno == EINTR) | |
2727 | continue; | |
2728 | ||
2729 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2730 | struct pollfd pollfd; | |
2731 | ||
2732 | zero(pollfd); | |
2733 | pollfd.fd = fd; | |
2734 | pollfd.events = POLLOUT; | |
2735 | ||
2736 | if (poll(&pollfd, 1, -1) < 0) { | |
2737 | if (errno == EINTR) | |
2738 | continue; | |
2739 | ||
2740 | return n > 0 ? n : -errno; | |
2741 | } | |
2742 | ||
2743 | if (pollfd.revents != POLLOUT) | |
2744 | return n > 0 ? n : -EIO; | |
2745 | ||
2746 | continue; | |
2747 | } | |
2748 | ||
2749 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2750 | } | |
2751 | ||
2752 | p += k; | |
2753 | nbytes -= k; | |
2754 | n += k; | |
2755 | } | |
2756 | ||
2757 | return n; | |
2758 | } | |
2759 | ||
24a6e4a4 LP |
2760 | int parse_usec(const char *t, usec_t *usec) { |
2761 | static const struct { | |
2762 | const char *suffix; | |
2763 | usec_t usec; | |
2764 | } table[] = { | |
2765 | { "sec", USEC_PER_SEC }, | |
2766 | { "s", USEC_PER_SEC }, | |
2767 | { "min", USEC_PER_MINUTE }, | |
2768 | { "hr", USEC_PER_HOUR }, | |
2769 | { "h", USEC_PER_HOUR }, | |
2770 | { "d", USEC_PER_DAY }, | |
2771 | { "w", USEC_PER_WEEK }, | |
2772 | { "msec", USEC_PER_MSEC }, | |
2773 | { "ms", USEC_PER_MSEC }, | |
2774 | { "m", USEC_PER_MINUTE }, | |
2775 | { "usec", 1ULL }, | |
2776 | { "us", 1ULL }, | |
d88a251b | 2777 | { "", USEC_PER_SEC }, /* default is sec */ |
24a6e4a4 LP |
2778 | }; |
2779 | ||
2780 | const char *p; | |
2781 | usec_t r = 0; | |
2782 | ||
2783 | assert(t); | |
2784 | assert(usec); | |
2785 | ||
2786 | p = t; | |
2787 | do { | |
2788 | long long l; | |
2789 | char *e; | |
2790 | unsigned i; | |
2791 | ||
2792 | errno = 0; | |
2793 | l = strtoll(p, &e, 10); | |
2794 | ||
2795 | if (errno != 0) | |
2796 | return -errno; | |
2797 | ||
2798 | if (l < 0) | |
2799 | return -ERANGE; | |
2800 | ||
2801 | if (e == p) | |
2802 | return -EINVAL; | |
2803 | ||
2804 | e += strspn(e, WHITESPACE); | |
2805 | ||
2806 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2807 | if (startswith(e, table[i].suffix)) { | |
2808 | r += (usec_t) l * table[i].usec; | |
2809 | p = e + strlen(table[i].suffix); | |
2810 | break; | |
2811 | } | |
2812 | ||
2813 | if (i >= ELEMENTSOF(table)) | |
2814 | return -EINVAL; | |
2815 | ||
2816 | } while (*p != 0); | |
2817 | ||
2818 | *usec = r; | |
2819 | ||
2820 | return 0; | |
2821 | } | |
2822 | ||
d88a251b LP |
2823 | int parse_nsec(const char *t, nsec_t *nsec) { |
2824 | static const struct { | |
2825 | const char *suffix; | |
2826 | nsec_t nsec; | |
2827 | } table[] = { | |
2828 | { "sec", NSEC_PER_SEC }, | |
2829 | { "s", NSEC_PER_SEC }, | |
2830 | { "min", NSEC_PER_MINUTE }, | |
2831 | { "hr", NSEC_PER_HOUR }, | |
2832 | { "h", NSEC_PER_HOUR }, | |
2833 | { "d", NSEC_PER_DAY }, | |
2834 | { "w", NSEC_PER_WEEK }, | |
2835 | { "msec", NSEC_PER_MSEC }, | |
2836 | { "ms", NSEC_PER_MSEC }, | |
2837 | { "m", NSEC_PER_MINUTE }, | |
2838 | { "usec", NSEC_PER_USEC }, | |
2839 | { "us", NSEC_PER_USEC }, | |
2840 | { "nsec", 1ULL }, | |
2841 | { "ns", 1ULL }, | |
2842 | { "", 1ULL }, /* default is nsec */ | |
2843 | }; | |
2844 | ||
2845 | const char *p; | |
2846 | nsec_t r = 0; | |
2847 | ||
2848 | assert(t); | |
2849 | assert(nsec); | |
2850 | ||
2851 | p = t; | |
2852 | do { | |
2853 | long long l; | |
2854 | char *e; | |
2855 | unsigned i; | |
2856 | ||
2857 | errno = 0; | |
2858 | l = strtoll(p, &e, 10); | |
2859 | ||
2860 | if (errno != 0) | |
2861 | return -errno; | |
2862 | ||
2863 | if (l < 0) | |
2864 | return -ERANGE; | |
2865 | ||
2866 | if (e == p) | |
2867 | return -EINVAL; | |
2868 | ||
2869 | e += strspn(e, WHITESPACE); | |
2870 | ||
2871 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2872 | if (startswith(e, table[i].suffix)) { | |
2873 | r += (nsec_t) l * table[i].nsec; | |
2874 | p = e + strlen(table[i].suffix); | |
2875 | break; | |
2876 | } | |
2877 | ||
2878 | if (i >= ELEMENTSOF(table)) | |
2879 | return -EINVAL; | |
2880 | ||
2881 | } while (*p != 0); | |
2882 | ||
2883 | *nsec = r; | |
2884 | ||
2885 | return 0; | |
2886 | } | |
2887 | ||
ab1f0633 LP |
2888 | int parse_bytes(const char *t, off_t *bytes) { |
2889 | static const struct { | |
2890 | const char *suffix; | |
2891 | off_t factor; | |
2892 | } table[] = { | |
2893 | { "B", 1 }, | |
2894 | { "K", 1024ULL }, | |
2895 | { "M", 1024ULL*1024ULL }, | |
2896 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2897 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2898 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2899 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2900 | { "", 1 }, |
2901 | }; | |
2902 | ||
2903 | const char *p; | |
2904 | off_t r = 0; | |
2905 | ||
2906 | assert(t); | |
2907 | assert(bytes); | |
2908 | ||
2909 | p = t; | |
2910 | do { | |
2911 | long long l; | |
2912 | char *e; | |
2913 | unsigned i; | |
2914 | ||
2915 | errno = 0; | |
2916 | l = strtoll(p, &e, 10); | |
2917 | ||
2918 | if (errno != 0) | |
2919 | return -errno; | |
2920 | ||
2921 | if (l < 0) | |
2922 | return -ERANGE; | |
2923 | ||
2924 | if (e == p) | |
2925 | return -EINVAL; | |
2926 | ||
2927 | e += strspn(e, WHITESPACE); | |
2928 | ||
2929 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2930 | if (startswith(e, table[i].suffix)) { | |
2931 | r += (off_t) l * table[i].factor; | |
2932 | p = e + strlen(table[i].suffix); | |
2933 | break; | |
2934 | } | |
2935 | ||
2936 | if (i >= ELEMENTSOF(table)) | |
2937 | return -EINVAL; | |
2938 | ||
2939 | } while (*p != 0); | |
2940 | ||
2941 | *bytes = r; | |
2942 | ||
2943 | return 0; | |
2944 | } | |
2945 | ||
843d2643 LP |
2946 | int make_stdio(int fd) { |
2947 | int r, s, t; | |
2948 | ||
2949 | assert(fd >= 0); | |
2950 | ||
2951 | r = dup2(fd, STDIN_FILENO); | |
2952 | s = dup2(fd, STDOUT_FILENO); | |
2953 | t = dup2(fd, STDERR_FILENO); | |
2954 | ||
2955 | if (fd >= 3) | |
2956 | close_nointr_nofail(fd); | |
2957 | ||
2958 | if (r < 0 || s < 0 || t < 0) | |
2959 | return -errno; | |
2960 | ||
7862f62d LP |
2961 | fd_cloexec(STDIN_FILENO, false); |
2962 | fd_cloexec(STDOUT_FILENO, false); | |
2963 | fd_cloexec(STDERR_FILENO, false); | |
2964 | ||
843d2643 LP |
2965 | return 0; |
2966 | } | |
2967 | ||
ade509ce LP |
2968 | int make_null_stdio(void) { |
2969 | int null_fd; | |
2970 | ||
cd3bd60a LP |
2971 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2972 | if (null_fd < 0) | |
ade509ce LP |
2973 | return -errno; |
2974 | ||
2975 | return make_stdio(null_fd); | |
2976 | } | |
2977 | ||
8407a5d0 LP |
2978 | bool is_device_path(const char *path) { |
2979 | ||
2980 | /* Returns true on paths that refer to a device, either in | |
2981 | * sysfs or in /dev */ | |
2982 | ||
2983 | return | |
2984 | path_startswith(path, "/dev/") || | |
2985 | path_startswith(path, "/sys/"); | |
2986 | } | |
2987 | ||
01f78473 LP |
2988 | int dir_is_empty(const char *path) { |
2989 | DIR *d; | |
2990 | int r; | |
2991 | struct dirent buf, *de; | |
2992 | ||
2993 | if (!(d = opendir(path))) | |
2994 | return -errno; | |
2995 | ||
2996 | for (;;) { | |
2997 | if ((r = readdir_r(d, &buf, &de)) > 0) { | |
2998 | r = -r; | |
2999 | break; | |
3000 | } | |
3001 | ||
3002 | if (!de) { | |
3003 | r = 1; | |
3004 | break; | |
3005 | } | |
3006 | ||
3007 | if (!ignore_file(de->d_name)) { | |
3008 | r = 0; | |
3009 | break; | |
3010 | } | |
3011 | } | |
3012 | ||
3013 | closedir(d); | |
3014 | return r; | |
3015 | } | |
3016 | ||
d3782d60 LP |
3017 | unsigned long long random_ull(void) { |
3018 | int fd; | |
3019 | uint64_t ull; | |
3020 | ssize_t r; | |
3021 | ||
ac0930c8 LP |
3022 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
3023 | if (fd < 0) | |
d3782d60 LP |
3024 | goto fallback; |
3025 | ||
eb22ac37 | 3026 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
3027 | close_nointr_nofail(fd); |
3028 | ||
3029 | if (r != sizeof(ull)) | |
3030 | goto fallback; | |
3031 | ||
3032 | return ull; | |
3033 | ||
3034 | fallback: | |
3035 | return random() * RAND_MAX + random(); | |
3036 | } | |
3037 | ||
5b6319dc LP |
3038 | void rename_process(const char name[8]) { |
3039 | assert(name); | |
3040 | ||
5d6b1584 LP |
3041 | /* This is a like a poor man's setproctitle(). It changes the |
3042 | * comm field, argv[0], and also the glibc's internally used | |
3043 | * name of the process. For the first one a limit of 16 chars | |
3044 | * applies, to the second one usually one of 10 (i.e. length | |
3045 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
3046 | * "systemd"). If you pass a longer string it will be | |
3047 | * truncated */ | |
5b6319dc | 3048 | |
5d6b1584 | 3049 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
3050 | |
3051 | if (program_invocation_name) | |
3052 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
3053 | |
3054 | if (saved_argc > 0) { | |
3055 | int i; | |
3056 | ||
3057 | if (saved_argv[0]) | |
3058 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
3059 | ||
3060 | for (i = 1; i < saved_argc; i++) { | |
3061 | if (!saved_argv[i]) | |
3062 | break; | |
3063 | ||
3064 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
3065 | } | |
3066 | } | |
5b6319dc LP |
3067 | } |
3068 | ||
7d793605 LP |
3069 | void sigset_add_many(sigset_t *ss, ...) { |
3070 | va_list ap; | |
3071 | int sig; | |
3072 | ||
3073 | assert(ss); | |
3074 | ||
3075 | va_start(ap, ss); | |
3076 | while ((sig = va_arg(ap, int)) > 0) | |
3077 | assert_se(sigaddset(ss, sig) == 0); | |
3078 | va_end(ap); | |
3079 | } | |
3080 | ||
ef2f1067 LP |
3081 | char* gethostname_malloc(void) { |
3082 | struct utsname u; | |
3083 | ||
3084 | assert_se(uname(&u) >= 0); | |
3085 | ||
344de609 | 3086 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
3087 | return strdup(u.nodename); |
3088 | ||
3089 | return strdup(u.sysname); | |
3090 | } | |
3091 | ||
344de609 LP |
3092 | bool hostname_is_set(void) { |
3093 | struct utsname u; | |
3094 | ||
3095 | assert_se(uname(&u) >= 0); | |
3096 | ||
3097 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
3098 | } | |
3099 | ||
7c5f152a | 3100 | static char *lookup_uid(uid_t uid) { |
ef2f1067 LP |
3101 | long bufsize; |
3102 | char *buf, *name; | |
3103 | struct passwd pwbuf, *pw = NULL; | |
ef2f1067 LP |
3104 | |
3105 | /* Shortcut things to avoid NSS lookups */ | |
3106 | if (uid == 0) | |
3107 | return strdup("root"); | |
3108 | ||
7c5f152a LP |
3109 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
3110 | if (bufsize <= 0) | |
ef2f1067 LP |
3111 | bufsize = 4096; |
3112 | ||
7c5f152a LP |
3113 | buf = malloc(bufsize); |
3114 | if (!buf) | |
ef2f1067 LP |
3115 | return NULL; |
3116 | ||
3117 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) { | |
3118 | name = strdup(pw->pw_name); | |
3119 | free(buf); | |
3120 | return name; | |
3121 | } | |
3122 | ||
3123 | free(buf); | |
3124 | ||
3125 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
3126 | return NULL; | |
3127 | ||
3128 | return name; | |
3129 | } | |
3130 | ||
7c5f152a LP |
3131 | char* getlogname_malloc(void) { |
3132 | uid_t uid; | |
3133 | struct stat st; | |
3134 | ||
3135 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
3136 | uid = st.st_uid; | |
3137 | else | |
3138 | uid = getuid(); | |
3139 | ||
3140 | return lookup_uid(uid); | |
3141 | } | |
3142 | ||
3143 | char *getusername_malloc(void) { | |
3144 | const char *e; | |
3145 | ||
3146 | e = getenv("USER"); | |
3147 | if (e) | |
3148 | return strdup(e); | |
3149 | ||
3150 | return lookup_uid(getuid()); | |
3151 | } | |
3152 | ||
fc116c6a LP |
3153 | int getttyname_malloc(int fd, char **r) { |
3154 | char path[PATH_MAX], *c; | |
618e02c7 | 3155 | int k; |
8c6db833 LP |
3156 | |
3157 | assert(r); | |
ef2f1067 | 3158 | |
fc116c6a | 3159 | if ((k = ttyname_r(fd, path, sizeof(path))) != 0) |
618e02c7 | 3160 | return -k; |
ef2f1067 LP |
3161 | |
3162 | char_array_0(path); | |
3163 | ||
fc116c6a | 3164 | if (!(c = strdup(startswith(path, "/dev/") ? path + 5 : path))) |
8c6db833 LP |
3165 | return -ENOMEM; |
3166 | ||
3167 | *r = c; | |
3168 | return 0; | |
3169 | } | |
3170 | ||
fc116c6a LP |
3171 | int getttyname_harder(int fd, char **r) { |
3172 | int k; | |
3173 | char *s; | |
3174 | ||
3175 | if ((k = getttyname_malloc(fd, &s)) < 0) | |
3176 | return k; | |
3177 | ||
3178 | if (streq(s, "tty")) { | |
3179 | free(s); | |
4d6d6518 | 3180 | return get_ctty(0, NULL, r); |
fc116c6a LP |
3181 | } |
3182 | ||
3183 | *r = s; | |
3184 | return 0; | |
3185 | } | |
3186 | ||
4d6d6518 | 3187 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
fc116c6a | 3188 | int k; |
4d6d6518 | 3189 | char line[LINE_MAX], *p, *fn; |
fc116c6a LP |
3190 | unsigned long ttynr; |
3191 | FILE *f; | |
3192 | ||
4d6d6518 LP |
3193 | if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0) |
3194 | return -ENOMEM; | |
3195 | ||
3196 | f = fopen(fn, "re"); | |
3197 | free(fn); | |
3198 | if (!f) | |
fc116c6a LP |
3199 | return -errno; |
3200 | ||
4d6d6518 | 3201 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 3202 | k = feof(f) ? -EIO : -errno; |
fc116c6a LP |
3203 | fclose(f); |
3204 | return k; | |
3205 | } | |
3206 | ||
3207 | fclose(f); | |
3208 | ||
4d6d6518 LP |
3209 | p = strrchr(line, ')'); |
3210 | if (!p) | |
fc116c6a LP |
3211 | return -EIO; |
3212 | ||
3213 | p++; | |
3214 | ||
3215 | if (sscanf(p, " " | |
3216 | "%*c " /* state */ | |
3217 | "%*d " /* ppid */ | |
3218 | "%*d " /* pgrp */ | |
3219 | "%*d " /* session */ | |
3220 | "%lu ", /* ttynr */ | |
3221 | &ttynr) != 1) | |
3222 | return -EIO; | |
3223 | ||
3224 | *d = (dev_t) ttynr; | |
3225 | return 0; | |
3226 | } | |
3227 | ||
4d6d6518 | 3228 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 3229 | int k; |
20c03b7b | 3230 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
3231 | dev_t devnr; |
3232 | ||
3233 | assert(r); | |
3234 | ||
4d6d6518 LP |
3235 | k = get_ctty_devnr(pid, &devnr); |
3236 | if (k < 0) | |
fc116c6a LP |
3237 | return k; |
3238 | ||
3239 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
3240 | char_array_0(fn); | |
3241 | ||
3242 | if ((k = readlink_malloc(fn, &s)) < 0) { | |
3243 | ||
3244 | if (k != -ENOENT) | |
3245 | return k; | |
3246 | ||
46824d0e LP |
3247 | /* This is an ugly hack */ |
3248 | if (major(devnr) == 136) { | |
3249 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
3250 | return -ENOMEM; | |
3251 | ||
3252 | *r = b; | |
3253 | if (_devnr) | |
3254 | *_devnr = devnr; | |
3255 | ||
3256 | return 0; | |
3257 | } | |
3258 | ||
fc116c6a LP |
3259 | /* Probably something like the ptys which have no |
3260 | * symlink in /dev/char. Let's return something | |
3261 | * vaguely useful. */ | |
3262 | ||
3263 | if (!(b = strdup(fn + 5))) | |
3264 | return -ENOMEM; | |
3265 | ||
3266 | *r = b; | |
46824d0e LP |
3267 | if (_devnr) |
3268 | *_devnr = devnr; | |
3269 | ||
fc116c6a LP |
3270 | return 0; |
3271 | } | |
3272 | ||
3273 | if (startswith(s, "/dev/")) | |
3274 | p = s + 5; | |
3275 | else if (startswith(s, "../")) | |
3276 | p = s + 3; | |
3277 | else | |
3278 | p = s; | |
3279 | ||
3280 | b = strdup(p); | |
3281 | free(s); | |
3282 | ||
3283 | if (!b) | |
3284 | return -ENOMEM; | |
3285 | ||
3286 | *r = b; | |
46824d0e LP |
3287 | if (_devnr) |
3288 | *_devnr = devnr; | |
3289 | ||
fc116c6a LP |
3290 | return 0; |
3291 | } | |
3292 | ||
f56d5db9 | 3293 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
3294 | DIR *d; |
3295 | int ret = 0; | |
3296 | ||
3297 | assert(fd >= 0); | |
3298 | ||
3299 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 3300 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 3301 | |
d4d046e3 LP |
3302 | d = fdopendir(fd); |
3303 | if (!d) { | |
8c6db833 | 3304 | close_nointr_nofail(fd); |
4c633005 LP |
3305 | |
3306 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
3307 | } |
3308 | ||
3309 | for (;;) { | |
3310 | struct dirent buf, *de; | |
7925c22a LP |
3311 | bool is_dir, keep_around; |
3312 | struct stat st; | |
8c6db833 LP |
3313 | int r; |
3314 | ||
d4d046e3 LP |
3315 | r = readdir_r(d, &buf, &de); |
3316 | if (r != 0 && ret == 0) { | |
3317 | ret = -r; | |
8c6db833 LP |
3318 | break; |
3319 | } | |
3320 | ||
3321 | if (!de) | |
3322 | break; | |
3323 | ||
3324 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
3325 | continue; | |
3326 | ||
7925c22a LP |
3327 | if (de->d_type == DT_UNKNOWN || |
3328 | honour_sticky || | |
3329 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 3330 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 3331 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3332 | ret = -errno; |
3333 | continue; | |
3334 | } | |
3335 | ||
3336 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
3337 | keep_around = |
3338 | honour_sticky && | |
3339 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
3340 | (st.st_mode & S_ISVTX); | |
ad293f5a | 3341 | } else { |
8c6db833 | 3342 | is_dir = de->d_type == DT_DIR; |
7925c22a | 3343 | keep_around = false; |
ad293f5a | 3344 | } |
8c6db833 LP |
3345 | |
3346 | if (is_dir) { | |
3347 | int subdir_fd; | |
8c6db833 | 3348 | |
597f43c7 | 3349 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
3350 | if (root_dev && st.st_dev != root_dev->st_dev) |
3351 | continue; | |
8c6db833 | 3352 | |
7925c22a LP |
3353 | subdir_fd = openat(fd, de->d_name, |
3354 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
3355 | if (subdir_fd < 0) { | |
3356 | if (ret == 0 && errno != ENOENT) | |
3357 | ret = -errno; | |
3358 | continue; | |
3359 | } | |
3360 | ||
3361 | r = rm_rf_children(subdir_fd, only_dirs, honour_sticky, root_dev); | |
3362 | if (r < 0 && ret == 0) | |
3363 | ret = r; | |
3364 | ||
3365 | if (!keep_around) | |
3366 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
3367 | if (ret == 0 && errno != ENOENT) |
3368 | ret = -errno; | |
3369 | } | |
3370 | ||
3371 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
3372 | |
3373 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3374 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3375 | ret = -errno; |
3376 | } | |
3377 | } | |
3378 | } | |
3379 | ||
3380 | closedir(d); | |
3381 | ||
3382 | return ret; | |
3383 | } | |
3384 | ||
f56d5db9 LP |
3385 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
3386 | struct statfs s; | |
3387 | ||
3388 | assert(fd >= 0); | |
3389 | ||
3390 | if (fstatfs(fd, &s) < 0) { | |
3391 | close_nointr_nofail(fd); | |
3392 | return -errno; | |
3393 | } | |
3394 | ||
3395 | /* We refuse to clean disk file systems with this call. This | |
3396 | * is extra paranoia just to be sure we never ever remove | |
3397 | * non-state data */ | |
3398 | ||
3399 | if (s.f_type != TMPFS_MAGIC && | |
3400 | s.f_type != RAMFS_MAGIC) { | |
3401 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3402 | close_nointr_nofail(fd); | |
3403 | return -EPERM; | |
3404 | } | |
3405 | ||
3406 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
3407 | } | |
3408 | ||
3409 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
3410 | int fd, r; | |
3411 | struct statfs s; | |
8c6db833 LP |
3412 | |
3413 | assert(path); | |
3414 | ||
f56d5db9 LP |
3415 | /* We refuse to clean the root file system with this |
3416 | * call. This is extra paranoia to never cause a really | |
3417 | * seriously broken system. */ | |
3418 | if (path_equal(path, "/")) { | |
3419 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
3420 | return -EPERM; | |
3421 | } | |
461b1822 | 3422 | |
d4d046e3 LP |
3423 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
3424 | if (fd < 0) { | |
8c6db833 LP |
3425 | |
3426 | if (errno != ENOTDIR) | |
3427 | return -errno; | |
3428 | ||
f56d5db9 LP |
3429 | if (!dangerous) { |
3430 | if (statfs(path, &s) < 0) | |
3431 | return -errno; | |
3432 | ||
3433 | if (s.f_type != TMPFS_MAGIC && | |
3434 | s.f_type != RAMFS_MAGIC) { | |
3435 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3436 | return -EPERM; | |
3437 | } | |
3438 | } | |
3439 | ||
8c6db833 | 3440 | if (delete_root && !only_dirs) |
d4d046e3 | 3441 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
3442 | return -errno; |
3443 | ||
3444 | return 0; | |
3445 | } | |
3446 | ||
f56d5db9 LP |
3447 | if (!dangerous) { |
3448 | if (fstatfs(fd, &s) < 0) { | |
3449 | close_nointr_nofail(fd); | |
3450 | return -errno; | |
3451 | } | |
ad293f5a | 3452 | |
f56d5db9 LP |
3453 | if (s.f_type != TMPFS_MAGIC && |
3454 | s.f_type != RAMFS_MAGIC) { | |
3455 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3456 | close_nointr_nofail(fd); | |
3457 | return -EPERM; | |
3458 | } | |
3459 | } | |
3460 | ||
3461 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
3462 | if (delete_root) { |
3463 | ||
8d53b453 | 3464 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 3465 | return r; |
8c6db833 | 3466 | |
e27796a0 | 3467 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
3468 | if (r == 0) |
3469 | r = -errno; | |
3470 | } | |
ad293f5a | 3471 | } |
8c6db833 LP |
3472 | |
3473 | return r; | |
3474 | } | |
3475 | ||
f56d5db9 LP |
3476 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
3477 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
3478 | } | |
3479 | ||
3480 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
3481 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
3482 | } | |
3483 | ||
8c6db833 LP |
3484 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
3485 | assert(path); | |
3486 | ||
3487 | /* Under the assumption that we are running privileged we | |
3488 | * first change the access mode and only then hand out | |
3489 | * ownership to avoid a window where access is too open. */ | |
3490 | ||
8d53b453 LP |
3491 | if (mode != (mode_t) -1) |
3492 | if (chmod(path, mode) < 0) | |
3493 | return -errno; | |
8c6db833 | 3494 | |
8d53b453 LP |
3495 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
3496 | if (chown(path, uid, gid) < 0) | |
3497 | return -errno; | |
8c6db833 LP |
3498 | |
3499 | return 0; | |
ef2f1067 LP |
3500 | } |
3501 | ||
f4b47811 LP |
3502 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
3503 | assert(fd >= 0); | |
3504 | ||
3505 | /* Under the assumption that we are running privileged we | |
3506 | * first change the access mode and only then hand out | |
3507 | * ownership to avoid a window where access is too open. */ | |
3508 | ||
3509 | if (fchmod(fd, mode) < 0) | |
3510 | return -errno; | |
3511 | ||
3512 | if (fchown(fd, uid, gid) < 0) | |
3513 | return -errno; | |
3514 | ||
3515 | return 0; | |
3516 | } | |
3517 | ||
82c121a4 LP |
3518 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3519 | cpu_set_t *r; | |
3520 | unsigned n = 1024; | |
3521 | ||
3522 | /* Allocates the cpuset in the right size */ | |
3523 | ||
3524 | for (;;) { | |
3525 | if (!(r = CPU_ALLOC(n))) | |
3526 | return NULL; | |
3527 | ||
3528 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3529 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3530 | ||
3531 | if (ncpus) | |
3532 | *ncpus = n; | |
3533 | ||
3534 | return r; | |
3535 | } | |
3536 | ||
3537 | CPU_FREE(r); | |
3538 | ||
3539 | if (errno != EINVAL) | |
3540 | return NULL; | |
3541 | ||
3542 | n *= 2; | |
3543 | } | |
3544 | } | |
3545 | ||
67e5cc4f | 3546 | void status_vprintf(const char *status, bool ellipse, const char *format, va_list ap) { |
9ab7a8d2 MS |
3547 | char *s = NULL; |
3548 | static const char status_indent[] = " "; /* "[" STATUS "] " */ | |
3549 | int fd = -1; | |
81beb750 LP |
3550 | struct iovec iovec[5]; |
3551 | int n = 0; | |
9e58ff9c LP |
3552 | |
3553 | assert(format); | |
3554 | ||
9ab7a8d2 | 3555 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
3556 | * optional and go exclusively to the console. */ |
3557 | ||
3558 | if (vasprintf(&s, format, ap) < 0) | |
3559 | goto finish; | |
3560 | ||
67e5cc4f | 3561 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 3562 | if (fd < 0) |
9e58ff9c LP |
3563 | goto finish; |
3564 | ||
67e5cc4f | 3565 | if (ellipse) { |
9ab7a8d2 MS |
3566 | char *e; |
3567 | size_t emax, sl; | |
3568 | int c; | |
3569 | ||
67e5cc4f LP |
3570 | c = fd_columns(fd); |
3571 | if (c <= 0) | |
3572 | c = 80; | |
81beb750 | 3573 | |
9ab7a8d2 MS |
3574 | sl = status ? strlen(status_indent) : 0; |
3575 | ||
3576 | emax = c - sl - 1; | |
3577 | if (emax < 3) | |
3578 | emax = 3; | |
81beb750 | 3579 | |
67e5cc4f LP |
3580 | e = ellipsize(s, emax, 75); |
3581 | if (e) { | |
3582 | free(s); | |
3583 | s = e; | |
3584 | } | |
81beb750 LP |
3585 | } |
3586 | ||
3587 | zero(iovec); | |
81beb750 | 3588 | |
9ab7a8d2 MS |
3589 | if (status) { |
3590 | if (!isempty(status)) { | |
3591 | IOVEC_SET_STRING(iovec[n++], "["); | |
3592 | IOVEC_SET_STRING(iovec[n++], status); | |
3593 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3594 | } else | |
3595 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3596 | } |
3597 | ||
9ab7a8d2 MS |
3598 | IOVEC_SET_STRING(iovec[n++], s); |
3599 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 LP |
3600 | |
3601 | writev(fd, iovec, n); | |
9e58ff9c LP |
3602 | |
3603 | finish: | |
3604 | free(s); | |
3605 | ||
3606 | if (fd >= 0) | |
3607 | close_nointr_nofail(fd); | |
3608 | } | |
3609 | ||
67e5cc4f | 3610 | void status_printf(const char *status, bool ellipse, const char *format, ...) { |
c846ff47 LP |
3611 | va_list ap; |
3612 | ||
3613 | assert(format); | |
3614 | ||
3615 | va_start(ap, format); | |
67e5cc4f | 3616 | status_vprintf(status, ellipse, format, ap); |
c846ff47 LP |
3617 | va_end(ap); |
3618 | } | |
3619 | ||
3620 | void status_welcome(void) { | |
10aa7034 LP |
3621 | char *pretty_name = NULL, *ansi_color = NULL; |
3622 | const char *const_pretty = NULL, *const_color = NULL; | |
3623 | int r; | |
c846ff47 | 3624 | |
10aa7034 LP |
3625 | if ((r = parse_env_file("/etc/os-release", NEWLINE, |
3626 | "PRETTY_NAME", &pretty_name, | |
3627 | "ANSI_COLOR", &ansi_color, | |
3628 | NULL)) < 0) { | |
c846ff47 | 3629 | |
10aa7034 LP |
3630 | if (r != -ENOENT) |
3631 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3632 | } | |
c846ff47 | 3633 | |
10aa7034 LP |
3634 | if (!pretty_name && !const_pretty) |
3635 | const_pretty = "Linux"; | |
3636 | ||
3637 | if (!ansi_color && !const_color) | |
3638 | const_color = "1"; | |
3639 | ||
81beb750 | 3640 | status_printf(NULL, |
67e5cc4f | 3641 | false, |
81beb750 | 3642 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", |
10aa7034 LP |
3643 | const_color ? const_color : ansi_color, |
3644 | const_pretty ? const_pretty : pretty_name); | |
86a3475b LP |
3645 | |
3646 | free(ansi_color); | |
3647 | free(pretty_name); | |
c846ff47 LP |
3648 | } |
3649 | ||
fab56fc5 LP |
3650 | char *replace_env(const char *format, char **env) { |
3651 | enum { | |
3652 | WORD, | |
c24eb49e | 3653 | CURLY, |
fab56fc5 LP |
3654 | VARIABLE |
3655 | } state = WORD; | |
3656 | ||
3657 | const char *e, *word = format; | |
3658 | char *r = NULL, *k; | |
3659 | ||
3660 | assert(format); | |
3661 | ||
3662 | for (e = format; *e; e ++) { | |
3663 | ||
3664 | switch (state) { | |
3665 | ||
3666 | case WORD: | |
3667 | if (*e == '$') | |
c24eb49e | 3668 | state = CURLY; |
fab56fc5 LP |
3669 | break; |
3670 | ||
c24eb49e LP |
3671 | case CURLY: |
3672 | if (*e == '{') { | |
fab56fc5 LP |
3673 | if (!(k = strnappend(r, word, e-word-1))) |
3674 | goto fail; | |
3675 | ||
3676 | free(r); | |
3677 | r = k; | |
3678 | ||
3679 | word = e-1; | |
3680 | state = VARIABLE; | |
3681 | ||
3682 | } else if (*e == '$') { | |
3683 | if (!(k = strnappend(r, word, e-word))) | |
3684 | goto fail; | |
3685 | ||
3686 | free(r); | |
3687 | r = k; | |
3688 | ||
3689 | word = e+1; | |
3690 | state = WORD; | |
3691 | } else | |
3692 | state = WORD; | |
3693 | break; | |
3694 | ||
3695 | case VARIABLE: | |
c24eb49e | 3696 | if (*e == '}') { |
b95cf362 | 3697 | const char *t; |
fab56fc5 | 3698 | |
b95cf362 LP |
3699 | if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) |
3700 | t = ""; | |
fab56fc5 | 3701 | |
b95cf362 LP |
3702 | if (!(k = strappend(r, t))) |
3703 | goto fail; | |
fab56fc5 | 3704 | |
b95cf362 LP |
3705 | free(r); |
3706 | r = k; | |
fab56fc5 | 3707 | |
b95cf362 | 3708 | word = e+1; |
fab56fc5 LP |
3709 | state = WORD; |
3710 | } | |
3711 | break; | |
3712 | } | |
3713 | } | |
3714 | ||
3715 | if (!(k = strnappend(r, word, e-word))) | |
3716 | goto fail; | |
3717 | ||
3718 | free(r); | |
3719 | return k; | |
3720 | ||
3721 | fail: | |
3722 | free(r); | |
3723 | return NULL; | |
3724 | } | |
3725 | ||
3726 | char **replace_env_argv(char **argv, char **env) { | |
3727 | char **r, **i; | |
c24eb49e LP |
3728 | unsigned k = 0, l = 0; |
3729 | ||
3730 | l = strv_length(argv); | |
fab56fc5 | 3731 | |
c24eb49e | 3732 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3733 | return NULL; |
3734 | ||
3735 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3736 | |
3737 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3738 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3739 | char *e; | |
3740 | char **w, **m; | |
3741 | unsigned q; | |
c24eb49e | 3742 | |
b95cf362 | 3743 | if ((e = strv_env_get(env, *i+1))) { |
c24eb49e LP |
3744 | |
3745 | if (!(m = strv_split_quoted(e))) { | |
3746 | r[k] = NULL; | |
3747 | strv_free(r); | |
3748 | return NULL; | |
3749 | } | |
b95cf362 LP |
3750 | } else |
3751 | m = NULL; | |
c24eb49e | 3752 | |
b95cf362 LP |
3753 | q = strv_length(m); |
3754 | l = l + q - 1; | |
c24eb49e | 3755 | |
b95cf362 LP |
3756 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3757 | r[k] = NULL; | |
3758 | strv_free(r); | |
3759 | strv_free(m); | |
3760 | return NULL; | |
3761 | } | |
c24eb49e | 3762 | |
b95cf362 LP |
3763 | r = w; |
3764 | if (m) { | |
c24eb49e LP |
3765 | memcpy(r + k, m, q * sizeof(char*)); |
3766 | free(m); | |
c24eb49e | 3767 | } |
b95cf362 LP |
3768 | |
3769 | k += q; | |
3770 | continue; | |
c24eb49e LP |
3771 | } |
3772 | ||
3773 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3774 | if (!(r[k++] = replace_env(*i, env))) { |
3775 | strv_free(r); | |
3776 | return NULL; | |
3777 | } | |
3778 | } | |
3779 | ||
3780 | r[k] = NULL; | |
3781 | return r; | |
3782 | } | |
3783 | ||
81beb750 LP |
3784 | int fd_columns(int fd) { |
3785 | struct winsize ws; | |
3786 | zero(ws); | |
3787 | ||
3788 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3789 | return -errno; | |
3790 | ||
3791 | if (ws.ws_col <= 0) | |
3792 | return -EIO; | |
3793 | ||
3794 | return ws.ws_col; | |
3795 | } | |
3796 | ||
11f96fac ZJS |
3797 | static unsigned columns_cached(bool cached) { |
3798 | static __thread int parsed_columns = 0, env_columns = -1; | |
fa776d8e LP |
3799 | const char *e; |
3800 | ||
11f96fac | 3801 | if (_likely_(parsed_columns > 0 && cached)) |
fa776d8e LP |
3802 | return parsed_columns; |
3803 | ||
11f96fac ZJS |
3804 | if (_unlikely_(env_columns == -1)) { |
3805 | e = getenv("COLUMNS"); | |
3806 | if (e) | |
3807 | env_columns = atoi(e); | |
3808 | else | |
3809 | env_columns = 0; | |
3810 | } | |
fa776d8e | 3811 | |
11f96fac ZJS |
3812 | if (env_columns > 0) { |
3813 | parsed_columns = env_columns; | |
3814 | return parsed_columns; | |
3815 | } | |
3816 | ||
3817 | if (parsed_columns <= 0 || !cached) | |
81beb750 | 3818 | parsed_columns = fd_columns(STDOUT_FILENO); |
fa776d8e LP |
3819 | |
3820 | if (parsed_columns <= 0) | |
3821 | parsed_columns = 80; | |
3822 | ||
3823 | return parsed_columns; | |
3824 | } | |
3825 | ||
11f96fac ZJS |
3826 | unsigned columns(void) { |
3827 | return columns_cached(true); | |
3828 | } | |
3829 | ||
3830 | unsigned columns_uncached(void) { | |
3831 | return columns_cached(false); | |
3832 | } | |
3833 | ||
8f2d43a0 LP |
3834 | int fd_lines(int fd) { |
3835 | struct winsize ws; | |
3836 | zero(ws); | |
3837 | ||
3838 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3839 | return -errno; | |
3840 | ||
3841 | if (ws.ws_row <= 0) | |
3842 | return -EIO; | |
3843 | ||
3844 | return ws.ws_row; | |
3845 | } | |
3846 | ||
3847 | unsigned lines(void) { | |
3848 | static __thread int parsed_lines = 0; | |
3849 | const char *e; | |
3850 | ||
3851 | if (_likely_(parsed_lines > 0)) | |
3852 | return parsed_lines; | |
3853 | ||
3854 | e = getenv("LINES"); | |
3855 | if (e) | |
3856 | parsed_lines = atoi(e); | |
3857 | ||
3858 | if (parsed_lines <= 0) | |
3859 | parsed_lines = fd_lines(STDOUT_FILENO); | |
3860 | ||
3861 | if (parsed_lines <= 0) | |
3862 | parsed_lines = 25; | |
3863 | ||
3864 | return parsed_lines; | |
3865 | } | |
3866 | ||
b4f10a5e LP |
3867 | int running_in_chroot(void) { |
3868 | struct stat a, b; | |
3869 | ||
3870 | zero(a); | |
3871 | zero(b); | |
3872 | ||
3873 | /* Only works as root */ | |
3874 | ||
3875 | if (stat("/proc/1/root", &a) < 0) | |
3876 | return -errno; | |
3877 | ||
3878 | if (stat("/", &b) < 0) | |
3879 | return -errno; | |
3880 | ||
3881 | return | |
3882 | a.st_dev != b.st_dev || | |
3883 | a.st_ino != b.st_ino; | |
3884 | } | |
3885 | ||
72f59706 LP |
3886 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3887 | size_t x; | |
8fe914ec LP |
3888 | char *r; |
3889 | ||
3890 | assert(s); | |
3891 | assert(percent <= 100); | |
72f59706 | 3892 | assert(new_length >= 3); |
8fe914ec | 3893 | |
72f59706 LP |
3894 | if (old_length <= 3 || old_length <= new_length) |
3895 | return strndup(s, old_length); | |
8fe914ec | 3896 | |
72f59706 LP |
3897 | r = new0(char, new_length+1); |
3898 | if (!r) | |
8fe914ec LP |
3899 | return r; |
3900 | ||
72f59706 | 3901 | x = (new_length * percent) / 100; |
8fe914ec | 3902 | |
72f59706 LP |
3903 | if (x > new_length - 3) |
3904 | x = new_length - 3; | |
8fe914ec LP |
3905 | |
3906 | memcpy(r, s, x); | |
3907 | r[x] = '.'; | |
3908 | r[x+1] = '.'; | |
3909 | r[x+2] = '.'; | |
3910 | memcpy(r + x + 3, | |
72f59706 LP |
3911 | s + old_length - (new_length - x - 3), |
3912 | new_length - x - 3); | |
8fe914ec LP |
3913 | |
3914 | return r; | |
3915 | } | |
3916 | ||
72f59706 LP |
3917 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3918 | return ellipsize_mem(s, strlen(s), length, percent); | |
3919 | } | |
3920 | ||
f6144808 LP |
3921 | int touch(const char *path) { |
3922 | int fd; | |
3923 | ||
3924 | assert(path); | |
3925 | ||
14f3c825 | 3926 | if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0) |
f6144808 LP |
3927 | return -errno; |
3928 | ||
3929 | close_nointr_nofail(fd); | |
3930 | return 0; | |
3931 | } | |
afea26ad | 3932 | |
97c4a07d | 3933 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3934 | size_t l; |
3935 | assert(s); | |
3936 | ||
31ed59c5 LP |
3937 | l = strlen(s); |
3938 | if (l < 2) | |
11ce3427 LP |
3939 | return strdup(s); |
3940 | ||
97c4a07d | 3941 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3942 | return strndup(s+1, l-2); |
3943 | ||
3944 | return strdup(s); | |
3945 | } | |
3946 | ||
5f7c426e LP |
3947 | char *normalize_env_assignment(const char *s) { |
3948 | char *name, *value, *p, *r; | |
3949 | ||
3950 | p = strchr(s, '='); | |
3951 | ||
3952 | if (!p) { | |
3953 | if (!(r = strdup(s))) | |
3954 | return NULL; | |
3955 | ||
3956 | return strstrip(r); | |
3957 | } | |
3958 | ||
3959 | if (!(name = strndup(s, p - s))) | |
3960 | return NULL; | |
3961 | ||
3962 | if (!(p = strdup(p+1))) { | |
3963 | free(name); | |
3964 | return NULL; | |
3965 | } | |
3966 | ||
3967 | value = unquote(strstrip(p), QUOTES); | |
3968 | free(p); | |
3969 | ||
3970 | if (!value) { | |
5f7c426e LP |
3971 | free(name); |
3972 | return NULL; | |
3973 | } | |
3974 | ||
3975 | if (asprintf(&r, "%s=%s", name, value) < 0) | |
3976 | r = NULL; | |
3977 | ||
3978 | free(value); | |
3979 | free(name); | |
3980 | ||
3981 | return r; | |
3982 | } | |
3983 | ||
8e12a6ae | 3984 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3985 | siginfo_t dummy; |
3986 | ||
2e78aa99 | 3987 | assert(pid >= 1); |
1968a360 LP |
3988 | |
3989 | if (!status) | |
3990 | status = &dummy; | |
2e78aa99 LP |
3991 | |
3992 | for (;;) { | |
8e12a6ae LP |
3993 | zero(*status); |
3994 | ||
3995 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3996 | |
3997 | if (errno == EINTR) | |
3998 | continue; | |
3999 | ||
4000 | return -errno; | |
4001 | } | |
4002 | ||
4003 | return 0; | |
4004 | } | |
4005 | } | |
4006 | ||
97c4a07d LP |
4007 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
4008 | int r; | |
4009 | siginfo_t status; | |
4010 | ||
4011 | assert(name); | |
4012 | assert(pid > 1); | |
4013 | ||
d87be9b0 LP |
4014 | r = wait_for_terminate(pid, &status); |
4015 | if (r < 0) { | |
97c4a07d LP |
4016 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
4017 | return r; | |
4018 | } | |
4019 | ||
4020 | if (status.si_code == CLD_EXITED) { | |
4021 | if (status.si_status != 0) { | |
4022 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 4023 | return status.si_status; |
97c4a07d LP |
4024 | } |
4025 | ||
4026 | log_debug("%s succeeded.", name); | |
4027 | return 0; | |
4028 | ||
4029 | } else if (status.si_code == CLD_KILLED || | |
4030 | status.si_code == CLD_DUMPED) { | |
4031 | ||
4032 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
4033 | return -EPROTO; | |
4034 | } | |
4035 | ||
4036 | log_warning("%s failed due to unknown reason.", name); | |
4037 | return -EPROTO; | |
97c4a07d LP |
4038 | } |
4039 | ||
6a39419f | 4040 | _noreturn_ void freeze(void) { |
720ce21d LP |
4041 | |
4042 | /* Make sure nobody waits for us on a socket anymore */ | |
4043 | close_all_fds(NULL, 0); | |
4044 | ||
c29597a1 LP |
4045 | sync(); |
4046 | ||
3c14d26c LP |
4047 | for (;;) |
4048 | pause(); | |
4049 | } | |
4050 | ||
00dc5d76 LP |
4051 | bool null_or_empty(struct stat *st) { |
4052 | assert(st); | |
4053 | ||
4054 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
4055 | return true; | |
4056 | ||
c8f26f42 | 4057 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
4058 | return true; |
4059 | ||
4060 | return false; | |
4061 | } | |
4062 | ||
83096483 LP |
4063 | int null_or_empty_path(const char *fn) { |
4064 | struct stat st; | |
4065 | ||
4066 | assert(fn); | |
4067 | ||
4068 | if (stat(fn, &st) < 0) | |
4069 | return -errno; | |
4070 | ||
4071 | return null_or_empty(&st); | |
4072 | } | |
4073 | ||
a247755d | 4074 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
4075 | int nfd; |
4076 | DIR *d; | |
4077 | ||
4078 | if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0) | |
4079 | return NULL; | |
4080 | ||
4081 | if (!(d = fdopendir(nfd))) { | |
4082 | close_nointr_nofail(nfd); | |
4083 | return NULL; | |
4084 | } | |
4085 | ||
4086 | return d; | |
3b63d2d3 LP |
4087 | } |
4088 | ||
8a0867d6 LP |
4089 | int signal_from_string_try_harder(const char *s) { |
4090 | int signo; | |
4091 | assert(s); | |
4092 | ||
4093 | if ((signo = signal_from_string(s)) <= 0) | |
4094 | if (startswith(s, "SIG")) | |
4095 | return signal_from_string(s+3); | |
4096 | ||
4097 | return signo; | |
4098 | } | |
4099 | ||
10717a1a LP |
4100 | void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { |
4101 | ||
4102 | assert(f); | |
4103 | assert(name); | |
4104 | assert(t); | |
4105 | ||
4106 | if (!dual_timestamp_is_set(t)) | |
4107 | return; | |
4108 | ||
4109 | fprintf(f, "%s=%llu %llu\n", | |
4110 | name, | |
4111 | (unsigned long long) t->realtime, | |
4112 | (unsigned long long) t->monotonic); | |
4113 | } | |
4114 | ||
799fd0fd | 4115 | void dual_timestamp_deserialize(const char *value, dual_timestamp *t) { |
10717a1a LP |
4116 | unsigned long long a, b; |
4117 | ||
10717a1a LP |
4118 | assert(value); |
4119 | assert(t); | |
4120 | ||
4121 | if (sscanf(value, "%lli %llu", &a, &b) != 2) | |
4122 | log_debug("Failed to parse finish timestamp value %s", value); | |
4123 | else { | |
4124 | t->realtime = a; | |
4125 | t->monotonic = b; | |
4126 | } | |
4127 | } | |
4128 | ||
383182b5 | 4129 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
e23a0ce8 LP |
4130 | char *dn, *t, *u; |
4131 | int r; | |
4132 | ||
4133 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
4134 | * UTF8 chars unescaped */ | |
4135 | ||
383182b5 DR |
4136 | u = unquote(tagvalue, "\"\'"); |
4137 | if (u == NULL) | |
4138 | return NULL; | |
e23a0ce8 | 4139 | |
383182b5 DR |
4140 | t = xescape(u, "/ "); |
4141 | free(u); | |
e23a0ce8 | 4142 | |
383182b5 DR |
4143 | if (t == NULL) |
4144 | return NULL; | |
e23a0ce8 | 4145 | |
383182b5 DR |
4146 | r = asprintf(&dn, "/dev/disk/by-%s/%s", by, t); |
4147 | free(t); | |
e23a0ce8 | 4148 | |
383182b5 DR |
4149 | if (r < 0) |
4150 | return NULL; | |
e23a0ce8 | 4151 | |
383182b5 DR |
4152 | return dn; |
4153 | } | |
e23a0ce8 | 4154 | |
383182b5 DR |
4155 | char *fstab_node_to_udev_node(const char *p) { |
4156 | if (startswith(p, "LABEL=")) | |
4157 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 4158 | |
383182b5 DR |
4159 | if (startswith(p, "UUID=")) |
4160 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 4161 | |
84cc2abf DR |
4162 | if (startswith(p, "PARTUUID=")) |
4163 | return tag_to_udev_node(p+9, "partuuid"); | |
4164 | ||
4165 | if (startswith(p, "PARTLABEL=")) | |
4166 | return tag_to_udev_node(p+10, "partlabel"); | |
4167 | ||
e23a0ce8 LP |
4168 | return strdup(p); |
4169 | } | |
4170 | ||
f212ac12 LP |
4171 | bool tty_is_vc(const char *tty) { |
4172 | assert(tty); | |
4173 | ||
4174 | if (startswith(tty, "/dev/")) | |
4175 | tty += 5; | |
4176 | ||
98a28fef LP |
4177 | return vtnr_from_tty(tty) >= 0; |
4178 | } | |
4179 | ||
d1122ad5 LP |
4180 | bool tty_is_console(const char *tty) { |
4181 | assert(tty); | |
4182 | ||
4183 | if (startswith(tty, "/dev/")) | |
4184 | tty += 5; | |
4185 | ||
4186 | return streq(tty, "console"); | |
4187 | } | |
4188 | ||
98a28fef LP |
4189 | int vtnr_from_tty(const char *tty) { |
4190 | int i, r; | |
4191 | ||
4192 | assert(tty); | |
4193 | ||
4194 | if (startswith(tty, "/dev/")) | |
4195 | tty += 5; | |
4196 | ||
4197 | if (!startswith(tty, "tty") ) | |
4198 | return -EINVAL; | |
4199 | ||
4200 | if (tty[3] < '0' || tty[3] > '9') | |
4201 | return -EINVAL; | |
4202 | ||
4203 | r = safe_atoi(tty+3, &i); | |
4204 | if (r < 0) | |
4205 | return r; | |
4206 | ||
4207 | if (i < 0 || i > 63) | |
4208 | return -EINVAL; | |
4209 | ||
4210 | return i; | |
f212ac12 LP |
4211 | } |
4212 | ||
3043935f | 4213 | bool tty_is_vc_resolve(const char *tty) { |
3030ccd7 | 4214 | char *active = NULL; |
3043935f | 4215 | bool b; |
3030ccd7 | 4216 | |
e3aa71c3 LP |
4217 | assert(tty); |
4218 | ||
4219 | if (startswith(tty, "/dev/")) | |
4220 | tty += 5; | |
4221 | ||
3d9a4122 LP |
4222 | /* Resolve where /dev/console is pointing to, if /sys is |
4223 | * actually ours (i.e. not read-only-mounted which is a sign | |
4224 | * for container setups) */ | |
4225 | if (streq(tty, "console") && path_is_read_only_fs("/sys") <= 0) | |
3030ccd7 | 4226 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { |
079a09fb LP |
4227 | /* If multiple log outputs are configured the |
4228 | * last one is what /dev/console points to */ | |
3043935f LP |
4229 | tty = strrchr(active, ' '); |
4230 | if (tty) | |
079a09fb LP |
4231 | tty++; |
4232 | else | |
4233 | tty = active; | |
3030ccd7 LP |
4234 | } |
4235 | ||
3043935f | 4236 | b = tty_is_vc(tty); |
3030ccd7 | 4237 | free(active); |
e3aa71c3 | 4238 | |
3043935f LP |
4239 | return b; |
4240 | } | |
4241 | ||
4242 | const char *default_term_for_tty(const char *tty) { | |
4243 | assert(tty); | |
4244 | ||
acda6a05 | 4245 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
4246 | } |
4247 | ||
87d2c1ff | 4248 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
4249 | assert(de); |
4250 | ||
4251 | if (ignore_file(de->d_name)) | |
4252 | return false; | |
4253 | ||
4254 | if (de->d_type != DT_REG && | |
4255 | de->d_type != DT_LNK && | |
4256 | de->d_type != DT_UNKNOWN) | |
4257 | return false; | |
4258 | ||
4259 | return true; | |
4260 | } | |
4261 | ||
87d2c1ff LP |
4262 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
4263 | assert(de); | |
4264 | ||
a228a22f LP |
4265 | if (de->d_type != DT_REG && |
4266 | de->d_type != DT_LNK && | |
4267 | de->d_type != DT_UNKNOWN) | |
4268 | return false; | |
4269 | ||
4270 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
4271 | return false; |
4272 | ||
4273 | return endswith(de->d_name, suffix); | |
4274 | } | |
4275 | ||
83cc030f LP |
4276 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
4277 | DIR *_d = NULL; | |
4278 | struct dirent *de; | |
4279 | Hashmap *pids = NULL; | |
4280 | ||
4281 | assert(directory); | |
4282 | ||
4283 | /* Executes all binaries in a directory in parallel and waits | |
4284 | * until all they all finished. */ | |
4285 | ||
4286 | if (!d) { | |
4287 | if (!(_d = opendir(directory))) { | |
4288 | ||
4289 | if (errno == ENOENT) | |
4290 | return; | |
4291 | ||
4292 | log_error("Failed to enumerate directory %s: %m", directory); | |
4293 | return; | |
4294 | } | |
4295 | ||
4296 | d = _d; | |
4297 | } | |
4298 | ||
4299 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
4300 | log_error("Failed to allocate set."); | |
4301 | goto finish; | |
4302 | } | |
4303 | ||
4304 | while ((de = readdir(d))) { | |
4305 | char *path; | |
4306 | pid_t pid; | |
4307 | int k; | |
4308 | ||
fb19a739 | 4309 | if (!dirent_is_file(de)) |
83cc030f LP |
4310 | continue; |
4311 | ||
4312 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 4313 | log_oom(); |
83cc030f LP |
4314 | continue; |
4315 | } | |
4316 | ||
4317 | if ((pid = fork()) < 0) { | |
4318 | log_error("Failed to fork: %m"); | |
4319 | free(path); | |
4320 | continue; | |
4321 | } | |
4322 | ||
4323 | if (pid == 0) { | |
4324 | char *_argv[2]; | |
4325 | /* Child */ | |
4326 | ||
4327 | if (!argv) { | |
4328 | _argv[0] = path; | |
4329 | _argv[1] = NULL; | |
4330 | argv = _argv; | |
4331 | } else | |
6edd7d0a | 4332 | argv[0] = path; |
83cc030f LP |
4333 | |
4334 | execv(path, argv); | |
4335 | ||
4336 | log_error("Failed to execute %s: %m", path); | |
4337 | _exit(EXIT_FAILURE); | |
4338 | } | |
4339 | ||
4340 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
4341 | ||
4342 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
4343 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
4344 | free(path); | |
4345 | } | |
4346 | } | |
4347 | ||
4348 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 4349 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
83cc030f LP |
4350 | siginfo_t si; |
4351 | char *path; | |
4352 | ||
4353 | zero(si); | |
ec3f9b53 | 4354 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
4355 | |
4356 | if (errno == EINTR) | |
4357 | continue; | |
4358 | ||
4359 | log_error("waitid() failed: %m"); | |
4360 | goto finish; | |
4361 | } | |
4362 | ||
4363 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 4364 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
4365 | if (si.si_code == CLD_EXITED) |
4366 | log_error("%s exited with exit status %i.", path, si.si_status); | |
4367 | else | |
4368 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
4369 | } else | |
4370 | log_debug("%s exited successfully.", path); | |
4371 | ||
4372 | free(path); | |
4373 | } | |
4374 | } | |
4375 | ||
4376 | finish: | |
4377 | if (_d) | |
4378 | closedir(_d); | |
4379 | ||
4380 | if (pids) | |
4381 | hashmap_free_free(pids); | |
4382 | } | |
4383 | ||
430c18ed LP |
4384 | int kill_and_sigcont(pid_t pid, int sig) { |
4385 | int r; | |
4386 | ||
4387 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4388 | ||
4389 | if (r >= 0) | |
4390 | kill(pid, SIGCONT); | |
4391 | ||
4392 | return r; | |
4393 | } | |
4394 | ||
05feefe0 LP |
4395 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4396 | const char *i; | |
4397 | ||
4398 | if (!nulstr) | |
4399 | return false; | |
4400 | ||
4401 | NULSTR_FOREACH(i, nulstr) | |
4402 | if (streq(i, needle)) | |
4403 | return true; | |
4404 | ||
4405 | return false; | |
4406 | } | |
4407 | ||
6faa1114 | 4408 | bool plymouth_running(void) { |
9408a2d2 | 4409 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4410 | } |
4411 | ||
9beb3f4d LP |
4412 | char* strshorten(char *s, size_t l) { |
4413 | assert(s); | |
4414 | ||
4415 | if (l < strlen(s)) | |
4416 | s[l] = 0; | |
4417 | ||
4418 | return s; | |
4419 | } | |
4420 | ||
4421 | static bool hostname_valid_char(char c) { | |
4422 | return | |
4423 | (c >= 'a' && c <= 'z') || | |
4424 | (c >= 'A' && c <= 'Z') || | |
4425 | (c >= '0' && c <= '9') || | |
4426 | c == '-' || | |
4427 | c == '_' || | |
4428 | c == '.'; | |
4429 | } | |
4430 | ||
4431 | bool hostname_is_valid(const char *s) { | |
4432 | const char *p; | |
4433 | ||
4434 | if (isempty(s)) | |
4435 | return false; | |
4436 | ||
4437 | for (p = s; *p; p++) | |
4438 | if (!hostname_valid_char(*p)) | |
4439 | return false; | |
4440 | ||
4441 | if (p-s > HOST_NAME_MAX) | |
4442 | return false; | |
4443 | ||
4444 | return true; | |
4445 | } | |
4446 | ||
4447 | char* hostname_cleanup(char *s) { | |
4448 | char *p, *d; | |
4449 | ||
4450 | for (p = s, d = s; *p; p++) | |
4451 | if ((*p >= 'a' && *p <= 'z') || | |
4452 | (*p >= 'A' && *p <= 'Z') || | |
4453 | (*p >= '0' && *p <= '9') || | |
4454 | *p == '-' || | |
4455 | *p == '_' || | |
4456 | *p == '.') | |
4457 | *(d++) = *p; | |
4458 | ||
4459 | *d = 0; | |
4460 | ||
4461 | strshorten(s, HOST_NAME_MAX); | |
4462 | return s; | |
4463 | } | |
4464 | ||
1325aa42 LP |
4465 | int pipe_eof(int fd) { |
4466 | struct pollfd pollfd; | |
4467 | int r; | |
4468 | ||
4469 | zero(pollfd); | |
4470 | pollfd.fd = fd; | |
4471 | pollfd.events = POLLIN|POLLHUP; | |
4472 | ||
4473 | r = poll(&pollfd, 1, 0); | |
4474 | if (r < 0) | |
4475 | return -errno; | |
4476 | ||
4477 | if (r == 0) | |
4478 | return 0; | |
4479 | ||
4480 | return pollfd.revents & POLLHUP; | |
4481 | } | |
4482 | ||
8f2d43a0 | 4483 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b LP |
4484 | struct pollfd pollfd; |
4485 | int r; | |
4486 | ||
4487 | zero(pollfd); | |
4488 | pollfd.fd = fd; | |
4489 | pollfd.events = event; | |
4490 | ||
8f2d43a0 | 4491 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
4492 | if (r < 0) |
4493 | return -errno; | |
4494 | ||
4495 | if (r == 0) | |
4496 | return 0; | |
4497 | ||
4498 | return pollfd.revents; | |
4499 | } | |
4500 | ||
5a3ab509 LP |
4501 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4502 | FILE *f; | |
4503 | char *t; | |
4504 | const char *fn; | |
4505 | size_t k; | |
4506 | int fd; | |
4507 | ||
4508 | assert(path); | |
4509 | assert(_f); | |
4510 | assert(_temp_path); | |
4511 | ||
4512 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4513 | if (!t) | |
4514 | return -ENOMEM; | |
4515 | ||
9eb977db | 4516 | fn = path_get_file_name(path); |
5a3ab509 LP |
4517 | k = fn-path; |
4518 | memcpy(t, path, k); | |
4519 | t[k] = '.'; | |
4520 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4521 | ||
4522 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4523 | if (fd < 0) { | |
4524 | free(t); | |
4525 | return -errno; | |
4526 | } | |
4527 | ||
4528 | f = fdopen(fd, "we"); | |
4529 | if (!f) { | |
4530 | unlink(t); | |
4531 | free(t); | |
4532 | return -errno; | |
4533 | } | |
4534 | ||
4535 | *_f = f; | |
4536 | *_temp_path = t; | |
4537 | ||
4538 | return 0; | |
4539 | } | |
4540 | ||
6ea832a2 | 4541 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4542 | assert(fd >= 0); |
4543 | ||
6ea832a2 LP |
4544 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4545 | return -errno; | |
4546 | ||
4547 | return 0; | |
4548 | } | |
4549 | ||
4550 | int terminal_vhangup(const char *name) { | |
4551 | int fd, r; | |
4552 | ||
4553 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4554 | if (fd < 0) | |
4555 | return fd; | |
4556 | ||
4557 | r = terminal_vhangup_fd(fd); | |
4558 | close_nointr_nofail(fd); | |
4559 | ||
4560 | return r; | |
4561 | } | |
4562 | ||
4563 | int vt_disallocate(const char *name) { | |
4564 | int fd, r; | |
4565 | unsigned u; | |
6ea832a2 LP |
4566 | |
4567 | /* Deallocate the VT if possible. If not possible | |
4568 | * (i.e. because it is the active one), at least clear it | |
4569 | * entirely (including the scrollback buffer) */ | |
4570 | ||
b83bc4e9 LP |
4571 | if (!startswith(name, "/dev/")) |
4572 | return -EINVAL; | |
4573 | ||
4574 | if (!tty_is_vc(name)) { | |
4575 | /* So this is not a VT. I guess we cannot deallocate | |
4576 | * it then. But let's at least clear the screen */ | |
4577 | ||
4578 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4579 | if (fd < 0) | |
4580 | return fd; | |
4581 | ||
8585357a LP |
4582 | loop_write(fd, |
4583 | "\033[r" /* clear scrolling region */ | |
4584 | "\033[H" /* move home */ | |
4585 | "\033[2J", /* clear screen */ | |
4586 | 10, false); | |
b83bc4e9 LP |
4587 | close_nointr_nofail(fd); |
4588 | ||
4589 | return 0; | |
4590 | } | |
6ea832a2 LP |
4591 | |
4592 | if (!startswith(name, "/dev/tty")) | |
4593 | return -EINVAL; | |
4594 | ||
4595 | r = safe_atou(name+8, &u); | |
4596 | if (r < 0) | |
4597 | return r; | |
4598 | ||
4599 | if (u <= 0) | |
b83bc4e9 | 4600 | return -EINVAL; |
6ea832a2 | 4601 | |
b83bc4e9 | 4602 | /* Try to deallocate */ |
6ea832a2 LP |
4603 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4604 | if (fd < 0) | |
4605 | return fd; | |
4606 | ||
4607 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4608 | close_nointr_nofail(fd); |
6ea832a2 | 4609 | |
b83bc4e9 LP |
4610 | if (r >= 0) |
4611 | return 0; | |
6ea832a2 | 4612 | |
b83bc4e9 | 4613 | if (errno != EBUSY) |
6ea832a2 | 4614 | return -errno; |
6ea832a2 | 4615 | |
b83bc4e9 LP |
4616 | /* Couldn't deallocate, so let's clear it fully with |
4617 | * scrollback */ | |
4618 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4619 | if (fd < 0) |
b83bc4e9 | 4620 | return fd; |
6ea832a2 | 4621 | |
8585357a LP |
4622 | loop_write(fd, |
4623 | "\033[r" /* clear scrolling region */ | |
4624 | "\033[H" /* move home */ | |
4625 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4626 | 10, false); | |
b83bc4e9 | 4627 | close_nointr_nofail(fd); |
6ea832a2 | 4628 | |
b83bc4e9 | 4629 | return 0; |
6ea832a2 LP |
4630 | } |
4631 | ||
34ca941c LP |
4632 | int copy_file(const char *from, const char *to) { |
4633 | int r, fdf, fdt; | |
4634 | ||
4635 | assert(from); | |
4636 | assert(to); | |
4637 | ||
4638 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4639 | if (fdf < 0) | |
4640 | return -errno; | |
4641 | ||
4642 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
4643 | if (fdt < 0) { | |
4644 | close_nointr_nofail(fdf); | |
4645 | return -errno; | |
4646 | } | |
4647 | ||
4648 | for (;;) { | |
4649 | char buf[PIPE_BUF]; | |
4650 | ssize_t n, k; | |
4651 | ||
4652 | n = read(fdf, buf, sizeof(buf)); | |
4653 | if (n < 0) { | |
4654 | r = -errno; | |
4655 | ||
4656 | close_nointr_nofail(fdf); | |
4657 | close_nointr(fdt); | |
4658 | unlink(to); | |
4659 | ||
4660 | return r; | |
4661 | } | |
4662 | ||
4663 | if (n == 0) | |
4664 | break; | |
4665 | ||
4666 | errno = 0; | |
4667 | k = loop_write(fdt, buf, n, false); | |
4668 | if (n != k) { | |
4669 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4670 | ||
4671 | close_nointr_nofail(fdf); | |
4672 | close_nointr(fdt); | |
4673 | ||
4674 | unlink(to); | |
4675 | return r; | |
4676 | } | |
4677 | } | |
4678 | ||
4679 | close_nointr_nofail(fdf); | |
4680 | r = close_nointr(fdt); | |
4681 | ||
4682 | if (r < 0) { | |
4683 | unlink(to); | |
4684 | return r; | |
4685 | } | |
4686 | ||
4687 | return 0; | |
4688 | } | |
4689 | ||
4690 | int symlink_or_copy(const char *from, const char *to) { | |
4691 | char *pf = NULL, *pt = NULL; | |
4692 | struct stat a, b; | |
4693 | int r; | |
4694 | ||
4695 | assert(from); | |
4696 | assert(to); | |
4697 | ||
9eb977db KS |
4698 | if (path_get_parent(from, &pf) < 0 || |
4699 | path_get_parent(to, &pt) < 0) { | |
34ca941c LP |
4700 | r = -ENOMEM; |
4701 | goto finish; | |
4702 | } | |
4703 | ||
4704 | if (stat(pf, &a) < 0 || | |
4705 | stat(pt, &b) < 0) { | |
4706 | r = -errno; | |
4707 | goto finish; | |
4708 | } | |
4709 | ||
4710 | if (a.st_dev != b.st_dev) { | |
4711 | free(pf); | |
4712 | free(pt); | |
4713 | ||
4714 | return copy_file(from, to); | |
4715 | } | |
4716 | ||
4717 | if (symlink(from, to) < 0) { | |
4718 | r = -errno; | |
4719 | goto finish; | |
4720 | } | |
4721 | ||
4722 | r = 0; | |
4723 | ||
4724 | finish: | |
4725 | free(pf); | |
4726 | free(pt); | |
4727 | ||
4728 | return r; | |
4729 | } | |
4730 | ||
4731 | int symlink_or_copy_atomic(const char *from, const char *to) { | |
4732 | char *t, *x; | |
4733 | const char *fn; | |
4734 | size_t k; | |
4735 | unsigned long long ull; | |
4736 | unsigned i; | |
4737 | int r; | |
4738 | ||
4739 | assert(from); | |
4740 | assert(to); | |
4741 | ||
4742 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4743 | if (!t) | |
4744 | return -ENOMEM; | |
4745 | ||
9eb977db | 4746 | fn = path_get_file_name(to); |
34ca941c LP |
4747 | k = fn-to; |
4748 | memcpy(t, to, k); | |
4749 | t[k] = '.'; | |
4750 | x = stpcpy(t+k+1, fn); | |
4751 | ||
4752 | ull = random_ull(); | |
4753 | for (i = 0; i < 16; i++) { | |
4754 | *(x++) = hexchar(ull & 0xF); | |
4755 | ull >>= 4; | |
4756 | } | |
4757 | ||
4758 | *x = 0; | |
4759 | ||
4760 | r = symlink_or_copy(from, t); | |
4761 | if (r < 0) { | |
4762 | unlink(t); | |
4763 | free(t); | |
4764 | return r; | |
4765 | } | |
4766 | ||
4767 | if (rename(t, to) < 0) { | |
4768 | r = -errno; | |
4769 | unlink(t); | |
4770 | free(t); | |
4771 | return r; | |
4772 | } | |
4773 | ||
4774 | free(t); | |
4775 | return r; | |
4776 | } | |
4777 | ||
4d6d6518 LP |
4778 | bool display_is_local(const char *display) { |
4779 | assert(display); | |
4780 | ||
4781 | return | |
4782 | display[0] == ':' && | |
4783 | display[1] >= '0' && | |
4784 | display[1] <= '9'; | |
4785 | } | |
4786 | ||
4787 | int socket_from_display(const char *display, char **path) { | |
4788 | size_t k; | |
4789 | char *f, *c; | |
4790 | ||
4791 | assert(display); | |
4792 | assert(path); | |
4793 | ||
4794 | if (!display_is_local(display)) | |
4795 | return -EINVAL; | |
4796 | ||
4797 | k = strspn(display+1, "0123456789"); | |
4798 | ||
4799 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4800 | if (!f) | |
4801 | return -ENOMEM; | |
4802 | ||
4803 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4804 | memcpy(c, display+1, k); | |
4805 | c[k] = 0; | |
4806 | ||
4807 | *path = f; | |
4808 | ||
4809 | return 0; | |
4810 | } | |
4811 | ||
d05c5031 LP |
4812 | int get_user_creds( |
4813 | const char **username, | |
4814 | uid_t *uid, gid_t *gid, | |
4815 | const char **home, | |
4816 | const char **shell) { | |
4817 | ||
1cccf435 | 4818 | struct passwd *p; |
ddd88763 | 4819 | uid_t u; |
1cccf435 MV |
4820 | |
4821 | assert(username); | |
4822 | assert(*username); | |
1cccf435 MV |
4823 | |
4824 | /* We enforce some special rules for uid=0: in order to avoid | |
4825 | * NSS lookups for root we hardcode its data. */ | |
4826 | ||
4827 | if (streq(*username, "root") || streq(*username, "0")) { | |
4828 | *username = "root"; | |
4b67834e LP |
4829 | |
4830 | if (uid) | |
4831 | *uid = 0; | |
4832 | ||
4833 | if (gid) | |
4834 | *gid = 0; | |
4835 | ||
4836 | if (home) | |
4837 | *home = "/root"; | |
d05c5031 LP |
4838 | |
4839 | if (shell) | |
4840 | *shell = "/bin/sh"; | |
4841 | ||
1cccf435 MV |
4842 | return 0; |
4843 | } | |
4844 | ||
ddd88763 | 4845 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4846 | errno = 0; |
ddd88763 | 4847 | p = getpwuid(u); |
1cccf435 MV |
4848 | |
4849 | /* If there are multiple users with the same id, make | |
4850 | * sure to leave $USER to the configured value instead | |
4851 | * of the first occurrence in the database. However if | |
4852 | * the uid was configured by a numeric uid, then let's | |
4853 | * pick the real username from /etc/passwd. */ | |
4854 | if (p) | |
4855 | *username = p->pw_name; | |
4856 | } else { | |
4857 | errno = 0; | |
4858 | p = getpwnam(*username); | |
4859 | } | |
4860 | ||
4861 | if (!p) | |
4862 | return errno != 0 ? -errno : -ESRCH; | |
4863 | ||
4b67834e LP |
4864 | if (uid) |
4865 | *uid = p->pw_uid; | |
4866 | ||
4867 | if (gid) | |
4868 | *gid = p->pw_gid; | |
4869 | ||
4870 | if (home) | |
4871 | *home = p->pw_dir; | |
4872 | ||
d05c5031 LP |
4873 | if (shell) |
4874 | *shell = p->pw_shell; | |
4875 | ||
4b67834e LP |
4876 | return 0; |
4877 | } | |
4878 | ||
4879 | int get_group_creds(const char **groupname, gid_t *gid) { | |
4880 | struct group *g; | |
4881 | gid_t id; | |
4882 | ||
4883 | assert(groupname); | |
4884 | ||
4885 | /* We enforce some special rules for gid=0: in order to avoid | |
4886 | * NSS lookups for root we hardcode its data. */ | |
4887 | ||
4888 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4889 | *groupname = "root"; | |
4890 | ||
4891 | if (gid) | |
4892 | *gid = 0; | |
4893 | ||
4894 | return 0; | |
4895 | } | |
4896 | ||
4897 | if (parse_gid(*groupname, &id) >= 0) { | |
4898 | errno = 0; | |
4899 | g = getgrgid(id); | |
4900 | ||
4901 | if (g) | |
4902 | *groupname = g->gr_name; | |
4903 | } else { | |
4904 | errno = 0; | |
4905 | g = getgrnam(*groupname); | |
4906 | } | |
4907 | ||
4908 | if (!g) | |
4909 | return errno != 0 ? -errno : -ESRCH; | |
4910 | ||
4911 | if (gid) | |
4912 | *gid = g->gr_gid; | |
4913 | ||
1cccf435 MV |
4914 | return 0; |
4915 | } | |
4916 | ||
43673799 LP |
4917 | int in_group(const char *name) { |
4918 | gid_t gid, *gids; | |
4919 | int ngroups_max, r, i; | |
4920 | ||
4921 | r = get_group_creds(&name, &gid); | |
4922 | if (r < 0) | |
4923 | return r; | |
4924 | ||
4925 | if (getgid() == gid) | |
4926 | return 1; | |
4927 | ||
4928 | if (getegid() == gid) | |
4929 | return 1; | |
4930 | ||
4931 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4932 | assert(ngroups_max > 0); | |
4933 | ||
4934 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4935 | ||
4936 | r = getgroups(ngroups_max, gids); | |
4937 | if (r < 0) | |
4938 | return -errno; | |
4939 | ||
4940 | for (i = 0; i < r; i++) | |
4941 | if (gids[i] == gid) | |
4942 | return 1; | |
4943 | ||
4944 | return 0; | |
4945 | } | |
4946 | ||
8092a428 LP |
4947 | int glob_exists(const char *path) { |
4948 | glob_t g; | |
4949 | int r, k; | |
4950 | ||
4951 | assert(path); | |
4952 | ||
4953 | zero(g); | |
4954 | errno = 0; | |
4955 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4956 | ||
4957 | if (k == GLOB_NOMATCH) | |
4958 | r = 0; | |
4959 | else if (k == GLOB_NOSPACE) | |
4960 | r = -ENOMEM; | |
4961 | else if (k == 0) | |
4962 | r = !strv_isempty(g.gl_pathv); | |
4963 | else | |
4964 | r = errno ? -errno : -EIO; | |
4965 | ||
4966 | globfree(&g); | |
4967 | ||
4968 | return r; | |
4969 | } | |
4970 | ||
83096483 LP |
4971 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4972 | struct stat st; | |
4973 | ||
4974 | assert(d); | |
4975 | assert(de); | |
4976 | ||
4977 | if (de->d_type != DT_UNKNOWN) | |
4978 | return 0; | |
4979 | ||
4980 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4981 | return -errno; | |
4982 | ||
4983 | de->d_type = | |
4984 | S_ISREG(st.st_mode) ? DT_REG : | |
4985 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4986 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4987 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4988 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4989 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4990 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4991 | DT_UNKNOWN; | |
4992 | ||
4993 | return 0; | |
4994 | } | |
4995 | ||
4996 | int in_search_path(const char *path, char **search) { | |
4997 | char **i, *parent; | |
4998 | int r; | |
4999 | ||
9eb977db | 5000 | r = path_get_parent(path, &parent); |
83096483 LP |
5001 | if (r < 0) |
5002 | return r; | |
5003 | ||
5004 | r = 0; | |
5005 | ||
5006 | STRV_FOREACH(i, search) { | |
5007 | if (path_equal(parent, *i)) { | |
5008 | r = 1; | |
5009 | break; | |
5010 | } | |
5011 | } | |
5012 | ||
5013 | free(parent); | |
5014 | ||
5015 | return r; | |
5016 | } | |
5017 | ||
034a2a52 LP |
5018 | int get_files_in_directory(const char *path, char ***list) { |
5019 | DIR *d; | |
5020 | int r = 0; | |
5021 | unsigned n = 0; | |
5022 | char **l = NULL; | |
5023 | ||
5024 | assert(path); | |
d60ef526 LP |
5025 | |
5026 | /* Returns all files in a directory in *list, and the number | |
5027 | * of files as return value. If list is NULL returns only the | |
5028 | * number */ | |
034a2a52 LP |
5029 | |
5030 | d = opendir(path); | |
8ea913b2 LP |
5031 | if (!d) |
5032 | return -errno; | |
5033 | ||
034a2a52 LP |
5034 | for (;;) { |
5035 | struct dirent buffer, *de; | |
5036 | int k; | |
5037 | ||
5038 | k = readdir_r(d, &buffer, &de); | |
5039 | if (k != 0) { | |
5040 | r = -k; | |
5041 | goto finish; | |
5042 | } | |
5043 | ||
5044 | if (!de) | |
5045 | break; | |
5046 | ||
5047 | dirent_ensure_type(d, de); | |
5048 | ||
5049 | if (!dirent_is_file(de)) | |
5050 | continue; | |
5051 | ||
d60ef526 LP |
5052 | if (list) { |
5053 | if ((unsigned) r >= n) { | |
5054 | char **t; | |
034a2a52 | 5055 | |
d60ef526 LP |
5056 | n = MAX(16, 2*r); |
5057 | t = realloc(l, sizeof(char*) * n); | |
5058 | if (!t) { | |
5059 | r = -ENOMEM; | |
5060 | goto finish; | |
5061 | } | |
034a2a52 | 5062 | |
d60ef526 LP |
5063 | l = t; |
5064 | } | |
034a2a52 | 5065 | |
d60ef526 | 5066 | assert((unsigned) r < n); |
034a2a52 | 5067 | |
d60ef526 LP |
5068 | l[r] = strdup(de->d_name); |
5069 | if (!l[r]) { | |
5070 | r = -ENOMEM; | |
5071 | goto finish; | |
5072 | } | |
034a2a52 | 5073 | |
d60ef526 LP |
5074 | l[++r] = NULL; |
5075 | } else | |
5076 | r++; | |
034a2a52 LP |
5077 | } |
5078 | ||
5079 | finish: | |
5080 | if (d) | |
5081 | closedir(d); | |
5082 | ||
d60ef526 LP |
5083 | if (r >= 0) { |
5084 | if (list) | |
5085 | *list = l; | |
5086 | } else | |
034a2a52 LP |
5087 | strv_free(l); |
5088 | ||
5089 | return r; | |
5090 | } | |
5091 | ||
b7def684 | 5092 | char *strjoin(const char *x, ...) { |
911a4828 LP |
5093 | va_list ap; |
5094 | size_t l; | |
5095 | char *r, *p; | |
5096 | ||
5097 | va_start(ap, x); | |
5098 | ||
5099 | if (x) { | |
5100 | l = strlen(x); | |
5101 | ||
5102 | for (;;) { | |
5103 | const char *t; | |
5104 | ||
5105 | t = va_arg(ap, const char *); | |
5106 | if (!t) | |
5107 | break; | |
5108 | ||
5109 | l += strlen(t); | |
5110 | } | |
5111 | } else | |
5112 | l = 0; | |
5113 | ||
5114 | va_end(ap); | |
5115 | ||
5116 | r = new(char, l+1); | |
5117 | if (!r) | |
5118 | return NULL; | |
5119 | ||
5120 | if (x) { | |
5121 | p = stpcpy(r, x); | |
5122 | ||
5123 | va_start(ap, x); | |
5124 | ||
5125 | for (;;) { | |
5126 | const char *t; | |
5127 | ||
5128 | t = va_arg(ap, const char *); | |
5129 | if (!t) | |
5130 | break; | |
5131 | ||
5132 | p = stpcpy(p, t); | |
5133 | } | |
8ea913b2 LP |
5134 | |
5135 | va_end(ap); | |
911a4828 LP |
5136 | } else |
5137 | r[0] = 0; | |
5138 | ||
5139 | return r; | |
5140 | } | |
5141 | ||
b636465b LP |
5142 | bool is_main_thread(void) { |
5143 | static __thread int cached = 0; | |
5144 | ||
5145 | if (_unlikely_(cached == 0)) | |
5146 | cached = getpid() == gettid() ? 1 : -1; | |
5147 | ||
5148 | return cached > 0; | |
5149 | } | |
5150 | ||
94959f0f LP |
5151 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
5152 | char *p, *s; | |
5153 | int r; | |
5154 | unsigned n, m; | |
5155 | ||
5156 | assert(ret); | |
5157 | ||
5158 | /* If it has a queue this is good enough for us */ | |
5159 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
5160 | return -ENOMEM; | |
5161 | ||
5162 | r = access(p, F_OK); | |
5163 | free(p); | |
5164 | ||
5165 | if (r >= 0) { | |
5166 | *ret = d; | |
5167 | return 0; | |
5168 | } | |
5169 | ||
5170 | /* If it is a partition find the originating device */ | |
5171 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
5172 | return -ENOMEM; | |
5173 | ||
5174 | r = access(p, F_OK); | |
5175 | free(p); | |
5176 | ||
5177 | if (r < 0) | |
5178 | return -ENOENT; | |
5179 | ||
5180 | /* Get parent dev_t */ | |
5181 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
5182 | return -ENOMEM; | |
5183 | ||
5184 | r = read_one_line_file(p, &s); | |
5185 | free(p); | |
5186 | ||
5187 | if (r < 0) | |
5188 | return r; | |
5189 | ||
5190 | r = sscanf(s, "%u:%u", &m, &n); | |
5191 | free(s); | |
5192 | ||
5193 | if (r != 2) | |
5194 | return -EINVAL; | |
5195 | ||
5196 | /* Only return this if it is really good enough for us. */ | |
5197 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
5198 | return -ENOMEM; | |
5199 | ||
5200 | r = access(p, F_OK); | |
5201 | free(p); | |
5202 | ||
5203 | if (r >= 0) { | |
5204 | *ret = makedev(m, n); | |
5205 | return 0; | |
5206 | } | |
5207 | ||
5208 | return -ENOENT; | |
5209 | } | |
5210 | ||
8d53b453 | 5211 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
5212 | struct stat st; |
5213 | ||
5214 | assert(p); | |
5215 | ||
5216 | if (lstat(p, &st) < 0) | |
5217 | return -errno; | |
5218 | ||
5219 | return | |
8d53b453 | 5220 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
5221 | (st.st_mode & S_ISVTX); |
5222 | } | |
94959f0f | 5223 | |
f41607a6 LP |
5224 | static const char *const ioprio_class_table[] = { |
5225 | [IOPRIO_CLASS_NONE] = "none", | |
5226 | [IOPRIO_CLASS_RT] = "realtime", | |
5227 | [IOPRIO_CLASS_BE] = "best-effort", | |
5228 | [IOPRIO_CLASS_IDLE] = "idle" | |
5229 | }; | |
5230 | ||
5231 | DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int); | |
5232 | ||
5233 | static const char *const sigchld_code_table[] = { | |
5234 | [CLD_EXITED] = "exited", | |
5235 | [CLD_KILLED] = "killed", | |
5236 | [CLD_DUMPED] = "dumped", | |
5237 | [CLD_TRAPPED] = "trapped", | |
5238 | [CLD_STOPPED] = "stopped", | |
5239 | [CLD_CONTINUED] = "continued", | |
5240 | }; | |
5241 | ||
5242 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
5243 | ||
5244 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
5245 | [LOG_FAC(LOG_KERN)] = "kern", | |
5246 | [LOG_FAC(LOG_USER)] = "user", | |
5247 | [LOG_FAC(LOG_MAIL)] = "mail", | |
5248 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
5249 | [LOG_FAC(LOG_AUTH)] = "auth", | |
5250 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
5251 | [LOG_FAC(LOG_LPR)] = "lpr", | |
5252 | [LOG_FAC(LOG_NEWS)] = "news", | |
5253 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
5254 | [LOG_FAC(LOG_CRON)] = "cron", | |
5255 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
5256 | [LOG_FAC(LOG_FTP)] = "ftp", | |
5257 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
5258 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
5259 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
5260 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
5261 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
5262 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
5263 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
5264 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
5265 | }; | |
5266 | ||
5267 | DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int); | |
5268 | ||
5269 | static const char *const log_level_table[] = { | |
5270 | [LOG_EMERG] = "emerg", | |
5271 | [LOG_ALERT] = "alert", | |
5272 | [LOG_CRIT] = "crit", | |
5273 | [LOG_ERR] = "err", | |
5274 | [LOG_WARNING] = "warning", | |
5275 | [LOG_NOTICE] = "notice", | |
5276 | [LOG_INFO] = "info", | |
5277 | [LOG_DEBUG] = "debug" | |
5278 | }; | |
5279 | ||
5280 | DEFINE_STRING_TABLE_LOOKUP(log_level, int); | |
5281 | ||
5282 | static const char* const sched_policy_table[] = { | |
5283 | [SCHED_OTHER] = "other", | |
5284 | [SCHED_BATCH] = "batch", | |
5285 | [SCHED_IDLE] = "idle", | |
5286 | [SCHED_FIFO] = "fifo", | |
5287 | [SCHED_RR] = "rr" | |
5288 | }; | |
5289 | ||
5290 | DEFINE_STRING_TABLE_LOOKUP(sched_policy, int); | |
5291 | ||
5292 | static const char* const rlimit_table[] = { | |
5293 | [RLIMIT_CPU] = "LimitCPU", | |
5294 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
5295 | [RLIMIT_DATA] = "LimitDATA", | |
5296 | [RLIMIT_STACK] = "LimitSTACK", | |
5297 | [RLIMIT_CORE] = "LimitCORE", | |
5298 | [RLIMIT_RSS] = "LimitRSS", | |
5299 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
5300 | [RLIMIT_AS] = "LimitAS", | |
5301 | [RLIMIT_NPROC] = "LimitNPROC", | |
5302 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
5303 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
5304 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
5305 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
5306 | [RLIMIT_NICE] = "LimitNICE", | |
5307 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
5308 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
5309 | }; | |
5310 | ||
5311 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
5312 | ||
5313 | static const char* const ip_tos_table[] = { | |
5314 | [IPTOS_LOWDELAY] = "low-delay", | |
5315 | [IPTOS_THROUGHPUT] = "throughput", | |
5316 | [IPTOS_RELIABILITY] = "reliability", | |
5317 | [IPTOS_LOWCOST] = "low-cost", | |
5318 | }; | |
5319 | ||
5320 | DEFINE_STRING_TABLE_LOOKUP(ip_tos, int); | |
5321 | ||
4e240ab0 | 5322 | static const char *const __signal_table[] = { |
f41607a6 LP |
5323 | [SIGHUP] = "HUP", |
5324 | [SIGINT] = "INT", | |
5325 | [SIGQUIT] = "QUIT", | |
5326 | [SIGILL] = "ILL", | |
5327 | [SIGTRAP] = "TRAP", | |
5328 | [SIGABRT] = "ABRT", | |
5329 | [SIGBUS] = "BUS", | |
5330 | [SIGFPE] = "FPE", | |
5331 | [SIGKILL] = "KILL", | |
5332 | [SIGUSR1] = "USR1", | |
5333 | [SIGSEGV] = "SEGV", | |
5334 | [SIGUSR2] = "USR2", | |
5335 | [SIGPIPE] = "PIPE", | |
5336 | [SIGALRM] = "ALRM", | |
5337 | [SIGTERM] = "TERM", | |
5338 | #ifdef SIGSTKFLT | |
5339 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
5340 | #endif | |
5341 | [SIGCHLD] = "CHLD", | |
5342 | [SIGCONT] = "CONT", | |
5343 | [SIGSTOP] = "STOP", | |
5344 | [SIGTSTP] = "TSTP", | |
5345 | [SIGTTIN] = "TTIN", | |
5346 | [SIGTTOU] = "TTOU", | |
5347 | [SIGURG] = "URG", | |
5348 | [SIGXCPU] = "XCPU", | |
5349 | [SIGXFSZ] = "XFSZ", | |
5350 | [SIGVTALRM] = "VTALRM", | |
5351 | [SIGPROF] = "PROF", | |
5352 | [SIGWINCH] = "WINCH", | |
5353 | [SIGIO] = "IO", | |
5354 | [SIGPWR] = "PWR", | |
5355 | [SIGSYS] = "SYS" | |
5356 | }; | |
5357 | ||
4e240ab0 MS |
5358 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
5359 | ||
5360 | const char *signal_to_string(int signo) { | |
5361 | static __thread char buf[12]; | |
5362 | const char *name; | |
5363 | ||
5364 | name = __signal_to_string(signo); | |
5365 | if (name) | |
5366 | return name; | |
5367 | ||
5368 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
5369 | snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN); | |
5370 | else | |
5371 | snprintf(buf, sizeof(buf) - 1, "%d", signo); | |
5372 | char_array_0(buf); | |
5373 | return buf; | |
5374 | } | |
5375 | ||
5376 | int signal_from_string(const char *s) { | |
5377 | int signo; | |
5378 | int offset = 0; | |
5379 | unsigned u; | |
5380 | ||
5381 | signo =__signal_from_string(s); | |
5382 | if (signo > 0) | |
5383 | return signo; | |
5384 | ||
5385 | if (startswith(s, "RTMIN+")) { | |
5386 | s += 6; | |
5387 | offset = SIGRTMIN; | |
5388 | } | |
5389 | if (safe_atou(s, &u) >= 0) { | |
5390 | signo = (int) u + offset; | |
5391 | if (signo > 0 && signo < _NSIG) | |
5392 | return signo; | |
5393 | } | |
5394 | return -1; | |
5395 | } | |
65457142 FC |
5396 | |
5397 | bool kexec_loaded(void) { | |
5398 | bool loaded = false; | |
5399 | char *s; | |
5400 | ||
5401 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
5402 | if (s[0] == '1') | |
5403 | loaded = true; | |
5404 | free(s); | |
5405 | } | |
5406 | return loaded; | |
5407 | } | |
fb9de93d LP |
5408 | |
5409 | int strdup_or_null(const char *a, char **b) { | |
5410 | char *c; | |
5411 | ||
5412 | assert(b); | |
5413 | ||
5414 | if (!a) { | |
5415 | *b = NULL; | |
5416 | return 0; | |
5417 | } | |
5418 | ||
5419 | c = strdup(a); | |
5420 | if (!c) | |
5421 | return -ENOMEM; | |
5422 | ||
5423 | *b = c; | |
5424 | return 0; | |
5425 | } | |
64685e0c | 5426 | |
87d2c1ff LP |
5427 | int prot_from_flags(int flags) { |
5428 | ||
5429 | switch (flags & O_ACCMODE) { | |
5430 | ||
5431 | case O_RDONLY: | |
5432 | return PROT_READ; | |
5433 | ||
5434 | case O_WRONLY: | |
5435 | return PROT_WRITE; | |
5436 | ||
5437 | case O_RDWR: | |
5438 | return PROT_READ|PROT_WRITE; | |
5439 | ||
5440 | default: | |
5441 | return -EINVAL; | |
5442 | } | |
7c99e0c1 | 5443 | } |
689b9a22 | 5444 | |
babfc091 | 5445 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 5446 | unsigned i; |
babfc091 LP |
5447 | |
5448 | static const struct { | |
5449 | const char *suffix; | |
5450 | off_t factor; | |
5451 | } table[] = { | |
32895bb3 LP |
5452 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
5453 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
5454 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
5455 | { "G", 1024ULL*1024ULL*1024ULL }, | |
5456 | { "M", 1024ULL*1024ULL }, | |
5457 | { "K", 1024ULL }, | |
5458 | }; | |
5459 | ||
5460 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
5461 | ||
5462 | if (t >= table[i].factor) { | |
5463 | snprintf(buf, l, | |
5464 | "%llu.%llu%s", | |
5465 | (unsigned long long) (t / table[i].factor), | |
5466 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
5467 | table[i].suffix); | |
5468 | ||
5469 | goto finish; | |
5470 | } | |
5471 | } | |
5472 | ||
5473 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
5474 | ||
5475 | finish: | |
5476 | buf[l-1] = 0; | |
5477 | return buf; | |
5478 | ||
5479 | } | |
55d7bfc1 LP |
5480 | |
5481 | void* memdup(const void *p, size_t l) { | |
5482 | void *r; | |
5483 | ||
5484 | assert(p); | |
5485 | ||
5486 | r = malloc(l); | |
5487 | if (!r) | |
5488 | return NULL; | |
5489 | ||
5490 | memcpy(r, p, l); | |
5491 | return r; | |
5492 | } | |
bb99a35a LP |
5493 | |
5494 | int fd_inc_sndbuf(int fd, size_t n) { | |
5495 | int r, value; | |
5496 | socklen_t l = sizeof(value); | |
5497 | ||
5498 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
5499 | if (r >= 0 && | |
5500 | l == sizeof(value) && | |
5501 | (size_t) value >= n*2) | |
5502 | return 0; | |
5503 | ||
5504 | value = (int) n; | |
5505 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
5506 | if (r < 0) | |
5507 | return -errno; | |
5508 | ||
5509 | return 1; | |
5510 | } | |
5511 | ||
5512 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5513 | int r, value; | |
5514 | socklen_t l = sizeof(value); | |
5515 | ||
5516 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
5517 | if (r >= 0 && | |
5518 | l == sizeof(value) && | |
5519 | (size_t) value >= n*2) | |
5520 | return 0; | |
5521 | ||
5522 | value = (int) n; | |
5523 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
5524 | if (r < 0) | |
5525 | return -errno; | |
5526 | ||
5527 | return 1; | |
5528 | } | |
6bb92a16 | 5529 | |
9bdc770c | 5530 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
5531 | pid_t parent_pid, agent_pid; |
5532 | int fd; | |
5533 | bool stdout_is_tty, stderr_is_tty; | |
5534 | unsigned n, i; | |
5535 | va_list ap; | |
5536 | char **l; | |
5537 | ||
5538 | assert(pid); | |
5539 | assert(path); | |
5540 | ||
5541 | parent_pid = getpid(); | |
5542 | ||
5543 | /* Spawns a temporary TTY agent, making sure it goes away when | |
5544 | * we go away */ | |
5545 | ||
5546 | agent_pid = fork(); | |
5547 | if (agent_pid < 0) | |
5548 | return -errno; | |
5549 | ||
5550 | if (agent_pid != 0) { | |
5551 | *pid = agent_pid; | |
5552 | return 0; | |
5553 | } | |
5554 | ||
5555 | /* In the child: | |
5556 | * | |
5557 | * Make sure the agent goes away when the parent dies */ | |
5558 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5559 | _exit(EXIT_FAILURE); | |
5560 | ||
5561 | /* Check whether our parent died before we were able | |
5562 | * to set the death signal */ | |
5563 | if (getppid() != parent_pid) | |
5564 | _exit(EXIT_SUCCESS); | |
5565 | ||
5566 | /* Don't leak fds to the agent */ | |
9bdc770c | 5567 | close_all_fds(except, n_except); |
6bb92a16 LP |
5568 | |
5569 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5570 | stderr_is_tty = isatty(STDERR_FILENO); | |
5571 | ||
5572 | if (!stdout_is_tty || !stderr_is_tty) { | |
5573 | /* Detach from stdout/stderr. and reopen | |
5574 | * /dev/tty for them. This is important to | |
5575 | * ensure that when systemctl is started via | |
5576 | * popen() or a similar call that expects to | |
5577 | * read EOF we actually do generate EOF and | |
5578 | * not delay this indefinitely by because we | |
5579 | * keep an unused copy of stdin around. */ | |
5580 | fd = open("/dev/tty", O_WRONLY); | |
5581 | if (fd < 0) { | |
5582 | log_error("Failed to open /dev/tty: %m"); | |
5583 | _exit(EXIT_FAILURE); | |
5584 | } | |
5585 | ||
5586 | if (!stdout_is_tty) | |
5587 | dup2(fd, STDOUT_FILENO); | |
5588 | ||
5589 | if (!stderr_is_tty) | |
5590 | dup2(fd, STDERR_FILENO); | |
5591 | ||
5592 | if (fd > 2) | |
5593 | close(fd); | |
5594 | } | |
5595 | ||
5596 | /* Count arguments */ | |
5597 | va_start(ap, path); | |
5598 | for (n = 0; va_arg(ap, char*); n++) | |
5599 | ; | |
5600 | va_end(ap); | |
5601 | ||
5602 | /* Allocate strv */ | |
5603 | l = alloca(sizeof(char *) * (n + 1)); | |
5604 | ||
5605 | /* Fill in arguments */ | |
5606 | va_start(ap, path); | |
5607 | for (i = 0; i <= n; i++) | |
5608 | l[i] = va_arg(ap, char*); | |
5609 | va_end(ap); | |
5610 | ||
5611 | execv(path, l); | |
5612 | _exit(EXIT_FAILURE); | |
5613 | } | |
68faf98c LP |
5614 | |
5615 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5616 | struct rlimit highest, fixed; | |
5617 | ||
5618 | assert(rlim); | |
5619 | ||
5620 | if (setrlimit(resource, rlim) >= 0) | |
5621 | return 0; | |
5622 | ||
5623 | if (errno != EPERM) | |
5624 | return -errno; | |
5625 | ||
5626 | /* So we failed to set the desired setrlimit, then let's try | |
5627 | * to get as close as we can */ | |
5628 | assert_se(getrlimit(resource, &highest) == 0); | |
5629 | ||
5630 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5631 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5632 | ||
5633 | if (setrlimit(resource, &fixed) < 0) | |
5634 | return -errno; | |
5635 | ||
5636 | return 0; | |
5637 | } | |
3d9a4122 | 5638 | |
ab94af92 LP |
5639 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
5640 | char path[sizeof("/proc/")-1+10+sizeof("/environ")], *value = NULL; | |
5641 | int r; | |
5642 | FILE *f; | |
5643 | bool done = false; | |
5644 | size_t l; | |
5645 | ||
5646 | assert(field); | |
5647 | assert(_value); | |
5648 | ||
5649 | if (pid == 0) | |
5650 | pid = getpid(); | |
5651 | ||
5652 | snprintf(path, sizeof(path), "/proc/%lu/environ", (unsigned long) pid); | |
5653 | char_array_0(path); | |
5654 | ||
5655 | f = fopen(path, "re"); | |
5656 | if (!f) | |
5657 | return -errno; | |
5658 | ||
5659 | l = strlen(field); | |
5660 | r = 0; | |
5661 | ||
5662 | do { | |
5663 | char line[LINE_MAX]; | |
5664 | unsigned i; | |
5665 | ||
5666 | for (i = 0; i < sizeof(line)-1; i++) { | |
5667 | int c; | |
5668 | ||
5669 | c = getc(f); | |
5670 | if (_unlikely_(c == EOF)) { | |
5671 | done = true; | |
5672 | break; | |
5673 | } else if (c == 0) | |
5674 | break; | |
5675 | ||
5676 | line[i] = c; | |
5677 | } | |
5678 | line[i] = 0; | |
5679 | ||
5680 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5681 | value = strdup(line + l + 1); | |
5682 | if (!value) { | |
5683 | r = -ENOMEM; | |
5684 | break; | |
5685 | } | |
5686 | ||
5687 | r = 1; | |
5688 | break; | |
5689 | } | |
5690 | ||
5691 | } while (!done); | |
5692 | ||
5693 | fclose(f); | |
5694 | ||
5695 | if (r >= 0) | |
5696 | *_value = value; | |
5697 | ||
5698 | return r; | |
5699 | } | |
d889a206 LP |
5700 | |
5701 | int can_sleep(const char *type) { | |
5702 | char *p, *w, *state; | |
5703 | size_t l, k; | |
5704 | bool found = false; | |
5705 | int r; | |
5706 | ||
5707 | assert(type); | |
5708 | ||
5709 | r = read_one_line_file("/sys/power/state", &p); | |
5710 | if (r < 0) | |
5711 | return r == -ENOENT ? 0 : r; | |
5712 | ||
5713 | k = strlen(type); | |
5714 | ||
5715 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) { | |
5716 | if (l == k && strncmp(w, type, l) == 0) { | |
5717 | found = true; | |
5718 | break; | |
5719 | } | |
5720 | } | |
5721 | ||
5722 | free(p); | |
5723 | return found; | |
5724 | } | |
49dbfa7b LP |
5725 | |
5726 | bool is_valid_documentation_url(const char *url) { | |
5727 | assert(url); | |
5728 | ||
5729 | if (startswith(url, "http://") && url[7]) | |
5730 | return true; | |
5731 | ||
5732 | if (startswith(url, "https://") && url[8]) | |
5733 | return true; | |
5734 | ||
5735 | if (startswith(url, "file:") && url[5]) | |
5736 | return true; | |
5737 | ||
5738 | if (startswith(url, "info:") && url[5]) | |
5739 | return true; | |
5740 | ||
5741 | if (startswith(url, "man:") && url[4]) | |
5742 | return true; | |
5743 | ||
5744 | return false; | |
5745 | } | |
9be346c9 HH |
5746 | |
5747 | bool in_initrd(void) { | |
8f33b5b8 | 5748 | static int saved = -1; |
825c6fe5 | 5749 | struct statfs s; |
8f33b5b8 | 5750 | |
825c6fe5 LP |
5751 | if (saved >= 0) |
5752 | return saved; | |
5753 | ||
5754 | /* We make two checks here: | |
5755 | * | |
5756 | * 1. the flag file /etc/initrd-release must exist | |
5757 | * 2. the root file system must be a memory file system | |
5758 | * | |
5759 | * The second check is extra paranoia, since misdetecting an | |
5760 | * initrd can have bad bad consequences due the initrd | |
5761 | * emptying when transititioning to the main systemd. | |
5762 | */ | |
5763 | ||
5764 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5765 | statfs("/", &s) >= 0 && | |
5766 | (s.f_type == TMPFS_MAGIC || s.f_type == RAMFS_MAGIC); | |
9be346c9 | 5767 | |
8f33b5b8 | 5768 | return saved; |
9be346c9 | 5769 | } |
069cfc85 LP |
5770 | |
5771 | void warn_melody(void) { | |
5772 | int fd; | |
5773 | ||
5774 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5775 | if (fd < 0) | |
5776 | return; | |
5777 | ||
5778 | /* Yeah, this is synchronous. Kinda sucks. Bute well... */ | |
5779 | ||
5780 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5781 | usleep(125*USEC_PER_MSEC); | |
5782 | ||
5783 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5784 | usleep(125*USEC_PER_MSEC); | |
5785 | ||
5786 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5787 | usleep(125*USEC_PER_MSEC); | |
5788 | ||
5789 | ioctl(fd, KIOCSOUND, 0); | |
5790 | close_nointr_nofail(fd); | |
5791 | } | |
cd3bd60a LP |
5792 | |
5793 | int make_console_stdio(void) { | |
5794 | int fd, r; | |
5795 | ||
5796 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5797 | ||
5798 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5799 | if (fd < 0) { | |
5800 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5801 | return fd; | |
5802 | } | |
5803 | ||
5804 | r = make_stdio(fd); | |
5805 | if (r < 0) { | |
5806 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5807 | return r; | |
5808 | } | |
5809 | ||
5810 | return 0; | |
5811 | } | |
7c5f152a LP |
5812 | |
5813 | int get_home_dir(char **_h) { | |
5814 | char *h; | |
5815 | const char *e; | |
5816 | uid_t u; | |
5817 | struct passwd *p; | |
5818 | ||
5819 | assert(_h); | |
5820 | ||
5821 | /* Take the user specified one */ | |
5822 | e = getenv("HOME"); | |
5823 | if (e) { | |
5824 | h = strdup(e); | |
5825 | if (!h) | |
5826 | return -ENOMEM; | |
5827 | ||
5828 | *_h = h; | |
5829 | return 0; | |
5830 | } | |
5831 | ||
5832 | /* Hardcode home directory for root to avoid NSS */ | |
5833 | u = getuid(); | |
5834 | if (u == 0) { | |
5835 | h = strdup("/root"); | |
5836 | if (!h) | |
5837 | return -ENOMEM; | |
5838 | ||
5839 | *_h = h; | |
5840 | return 0; | |
5841 | } | |
5842 | ||
5843 | /* Check the database... */ | |
5844 | errno = 0; | |
5845 | p = getpwuid(u); | |
5846 | if (!p) | |
5847 | return errno ? -errno : -ENOENT; | |
5848 | ||
5849 | if (!path_is_absolute(p->pw_dir)) | |
5850 | return -EINVAL; | |
5851 | ||
5852 | h = strdup(p->pw_dir); | |
5853 | if (!h) | |
5854 | return -ENOMEM; | |
5855 | ||
5856 | *_h = h; | |
5857 | return 0; | |
5858 | } | |
5859 | ||
5860 | int get_shell(char **_sh) { | |
5861 | char *sh; | |
5862 | const char *e; | |
5863 | uid_t u; | |
5864 | struct passwd *p; | |
5865 | ||
5866 | assert(_sh); | |
5867 | ||
5868 | /* Take the user specified one */ | |
5869 | e = getenv("SHELL"); | |
5870 | if (e) { | |
5871 | sh = strdup(e); | |
5872 | if (!sh) | |
5873 | return -ENOMEM; | |
5874 | ||
5875 | *_sh = sh; | |
5876 | return 0; | |
5877 | } | |
5878 | ||
5879 | /* Hardcode home directory for root to avoid NSS */ | |
5880 | u = getuid(); | |
5881 | if (u == 0) { | |
5882 | sh = strdup("/bin/sh"); | |
5883 | if (!sh) | |
5884 | return -ENOMEM; | |
5885 | ||
5886 | *_sh = sh; | |
5887 | return 0; | |
5888 | } | |
5889 | ||
5890 | /* Check the database... */ | |
5891 | errno = 0; | |
5892 | p = getpwuid(u); | |
5893 | if (!p) | |
5894 | return errno ? -errno : -ESRCH; | |
5895 | ||
5896 | if (!path_is_absolute(p->pw_shell)) | |
5897 | return -EINVAL; | |
5898 | ||
5899 | sh = strdup(p->pw_shell); | |
5900 | if (!sh) | |
5901 | return -ENOMEM; | |
5902 | ||
5903 | *_sh = sh; | |
5904 | return 0; | |
5905 | } |