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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))) { | |
912 | log_error("Out of memory"); | |
913 | r = -ENOMEM; | |
914 | goto finish; | |
915 | } | |
916 | ||
917 | t = strv_append(m, u); | |
918 | free(u); | |
919 | ||
920 | if (!t) { | |
921 | log_error("Out of memory"); | |
922 | r = -ENOMEM; | |
923 | goto finish; | |
924 | } | |
925 | ||
926 | strv_free(m); | |
927 | m = t; | |
928 | } | |
929 | ||
930 | r = 0; | |
931 | ||
932 | *rl = m; | |
933 | m = NULL; | |
934 | ||
935 | finish: | |
936 | if (f) | |
937 | fclose(f); | |
938 | ||
939 | strv_free(m); | |
940 | ||
941 | return r; | |
942 | } | |
943 | ||
7640a5de | 944 | int write_env_file(const char *fname, char **l) { |
34ca941c | 945 | char **i, *p; |
7640a5de LP |
946 | FILE *f; |
947 | int r; | |
948 | ||
34ca941c LP |
949 | r = fopen_temporary(fname, &f, &p); |
950 | if (r < 0) | |
951 | return r; | |
7640a5de | 952 | |
34ca941c LP |
953 | fchmod_umask(fileno(f), 0644); |
954 | ||
955 | errno = 0; | |
7640a5de LP |
956 | STRV_FOREACH(i, l) { |
957 | fputs(*i, f); | |
958 | fputc('\n', f); | |
959 | } | |
960 | ||
961 | fflush(f); | |
962 | ||
34ca941c LP |
963 | if (ferror(f)) { |
964 | if (errno != 0) | |
965 | r = -errno; | |
966 | else | |
967 | r = -EIO; | |
968 | } else { | |
969 | if (rename(p, fname) < 0) | |
970 | r = -errno; | |
971 | else | |
972 | r = 0; | |
973 | } | |
974 | ||
975 | if (r < 0) | |
976 | unlink(p); | |
977 | ||
7640a5de | 978 | fclose(f); |
34ca941c | 979 | free(p); |
7640a5de LP |
980 | |
981 | return r; | |
982 | } | |
983 | ||
7072ced8 LP |
984 | char *truncate_nl(char *s) { |
985 | assert(s); | |
986 | ||
987 | s[strcspn(s, NEWLINE)] = 0; | |
988 | return s; | |
989 | } | |
990 | ||
87d2c1ff | 991 | int get_process_comm(pid_t pid, char **name) { |
7072ced8 LP |
992 | int r; |
993 | ||
7072ced8 LP |
994 | assert(name); |
995 | ||
87d2c1ff LP |
996 | if (pid == 0) |
997 | r = read_one_line_file("/proc/self/comm", name); | |
998 | else { | |
999 | char *p; | |
1000 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) | |
1001 | return -ENOMEM; | |
7072ced8 | 1002 | |
87d2c1ff LP |
1003 | r = read_one_line_file(p, name); |
1004 | free(p); | |
1005 | } | |
7072ced8 | 1006 | |
87d2c1ff | 1007 | return r; |
7072ced8 LP |
1008 | } |
1009 | ||
87d2c1ff LP |
1010 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
1011 | char *r, *k; | |
c59760ee LP |
1012 | int c; |
1013 | bool space = false; | |
1014 | size_t left; | |
1015 | FILE *f; | |
1016 | ||
c59760ee LP |
1017 | assert(max_length > 0); |
1018 | assert(line); | |
1019 | ||
87d2c1ff LP |
1020 | if (pid == 0) |
1021 | f = fopen("/proc/self/cmdline", "re"); | |
1022 | else { | |
1023 | char *p; | |
1024 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1025 | return -ENOMEM; | |
c59760ee | 1026 | |
87d2c1ff LP |
1027 | f = fopen(p, "re"); |
1028 | free(p); | |
1029 | } | |
c59760ee LP |
1030 | |
1031 | if (!f) | |
1032 | return -errno; | |
1033 | ||
87d2c1ff LP |
1034 | r = new(char, max_length); |
1035 | if (!r) { | |
c59760ee LP |
1036 | fclose(f); |
1037 | return -ENOMEM; | |
1038 | } | |
1039 | ||
1040 | k = r; | |
1041 | left = max_length; | |
1042 | while ((c = getc(f)) != EOF) { | |
1043 | ||
1044 | if (isprint(c)) { | |
1045 | if (space) { | |
1046 | if (left <= 4) | |
1047 | break; | |
1048 | ||
1049 | *(k++) = ' '; | |
057fbb58 | 1050 | left--; |
c59760ee LP |
1051 | space = false; |
1052 | } | |
1053 | ||
1054 | if (left <= 4) | |
1055 | break; | |
1056 | ||
1057 | *(k++) = (char) c; | |
057fbb58 | 1058 | left--; |
c59760ee LP |
1059 | } else |
1060 | space = true; | |
1061 | } | |
1062 | ||
1063 | if (left <= 4) { | |
1064 | size_t n = MIN(left-1, 3U); | |
1065 | memcpy(k, "...", n); | |
1066 | k[n] = 0; | |
1067 | } else | |
1068 | *k = 0; | |
1069 | ||
1070 | fclose(f); | |
1071 | ||
35d2e7ec LP |
1072 | /* Kernel threads have no argv[] */ |
1073 | if (r[0] == 0) { | |
1074 | char *t; | |
1075 | int h; | |
1076 | ||
1077 | free(r); | |
1078 | ||
87d2c1ff LP |
1079 | if (!comm_fallback) |
1080 | return -ENOENT; | |
1081 | ||
1082 | h = get_process_comm(pid, &t); | |
1083 | if (h < 0) | |
35d2e7ec LP |
1084 | return h; |
1085 | ||
b7def684 | 1086 | r = strjoin("[", t, "]", NULL); |
35d2e7ec LP |
1087 | free(t); |
1088 | ||
87d2c1ff | 1089 | if (!r) |
35d2e7ec LP |
1090 | return -ENOMEM; |
1091 | } | |
fa776d8e | 1092 | |
c59760ee LP |
1093 | *line = r; |
1094 | return 0; | |
1095 | } | |
1096 | ||
1e5678d0 LP |
1097 | int is_kernel_thread(pid_t pid) { |
1098 | char *p; | |
1099 | size_t count; | |
1100 | char c; | |
1101 | bool eof; | |
1102 | FILE *f; | |
1103 | ||
1104 | if (pid == 0) | |
1105 | return 0; | |
1106 | ||
1107 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1108 | return -ENOMEM; | |
1109 | ||
1110 | f = fopen(p, "re"); | |
1111 | free(p); | |
1112 | ||
1113 | if (!f) | |
1114 | return -errno; | |
1115 | ||
1116 | count = fread(&c, 1, 1, f); | |
1117 | eof = feof(f); | |
1118 | fclose(f); | |
1119 | ||
1120 | /* Kernel threads have an empty cmdline */ | |
1121 | ||
1122 | if (count <= 0) | |
1123 | return eof ? 1 : -errno; | |
1124 | ||
1125 | return 0; | |
1126 | } | |
1127 | ||
87d2c1ff LP |
1128 | int get_process_exe(pid_t pid, char **name) { |
1129 | int r; | |
1130 | ||
1131 | assert(name); | |
1132 | ||
1133 | if (pid == 0) | |
1134 | r = readlink_malloc("/proc/self/exe", name); | |
1135 | else { | |
1136 | char *p; | |
1137 | if (asprintf(&p, "/proc/%lu/exe", (unsigned long) pid) < 0) | |
1138 | return -ENOMEM; | |
1139 | ||
1140 | r = readlink_malloc(p, name); | |
1141 | free(p); | |
1142 | } | |
1143 | ||
1144 | return r; | |
1145 | } | |
1146 | ||
7e4ab3c5 LP |
1147 | int get_process_uid(pid_t pid, uid_t *uid) { |
1148 | char *p; | |
1149 | FILE *f; | |
1150 | int r; | |
1151 | ||
1152 | assert(uid); | |
1153 | ||
1154 | if (pid == 0) | |
1155 | return getuid(); | |
1156 | ||
1157 | if (asprintf(&p, "/proc/%lu/status", (unsigned long) pid) < 0) | |
1158 | return -ENOMEM; | |
1159 | ||
1160 | f = fopen(p, "re"); | |
1161 | free(p); | |
1162 | ||
1163 | if (!f) | |
1164 | return -errno; | |
1165 | ||
1166 | while (!feof(f)) { | |
1167 | char line[LINE_MAX], *l; | |
1168 | ||
1169 | if (!fgets(line, sizeof(line), f)) { | |
1170 | if (feof(f)) | |
1171 | break; | |
1172 | ||
1173 | r = -errno; | |
1174 | goto finish; | |
1175 | } | |
1176 | ||
1177 | l = strstrip(line); | |
1178 | ||
1179 | if (startswith(l, "Uid:")) { | |
1180 | l += 4; | |
1181 | l += strspn(l, WHITESPACE); | |
1182 | ||
1183 | l[strcspn(l, WHITESPACE)] = 0; | |
1184 | ||
1185 | r = parse_uid(l, uid); | |
1186 | goto finish; | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | r = -EIO; | |
1191 | ||
1192 | finish: | |
1193 | fclose(f); | |
1194 | ||
1195 | return r; | |
1196 | } | |
1197 | ||
fab56fc5 LP |
1198 | char *strnappend(const char *s, const char *suffix, size_t b) { |
1199 | size_t a; | |
44d8db9e LP |
1200 | char *r; |
1201 | ||
fab56fc5 LP |
1202 | if (!s && !suffix) |
1203 | return strdup(""); | |
1204 | ||
1205 | if (!s) | |
1206 | return strndup(suffix, b); | |
1207 | ||
1208 | if (!suffix) | |
1209 | return strdup(s); | |
1210 | ||
44d8db9e LP |
1211 | assert(s); |
1212 | assert(suffix); | |
1213 | ||
1214 | a = strlen(s); | |
44d8db9e LP |
1215 | |
1216 | if (!(r = new(char, a+b+1))) | |
1217 | return NULL; | |
1218 | ||
1219 | memcpy(r, s, a); | |
1220 | memcpy(r+a, suffix, b); | |
1221 | r[a+b] = 0; | |
1222 | ||
1223 | return r; | |
1224 | } | |
87f0e418 | 1225 | |
fab56fc5 LP |
1226 | char *strappend(const char *s, const char *suffix) { |
1227 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
1228 | } | |
1229 | ||
87f0e418 LP |
1230 | int readlink_malloc(const char *p, char **r) { |
1231 | size_t l = 100; | |
1232 | ||
1233 | assert(p); | |
1234 | assert(r); | |
1235 | ||
1236 | for (;;) { | |
1237 | char *c; | |
1238 | ssize_t n; | |
1239 | ||
1240 | if (!(c = new(char, l))) | |
1241 | return -ENOMEM; | |
1242 | ||
1243 | if ((n = readlink(p, c, l-1)) < 0) { | |
1244 | int ret = -errno; | |
1245 | free(c); | |
1246 | return ret; | |
1247 | } | |
1248 | ||
1249 | if ((size_t) n < l-1) { | |
1250 | c[n] = 0; | |
1251 | *r = c; | |
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | free(c); | |
1256 | l *= 2; | |
1257 | } | |
1258 | } | |
1259 | ||
2c7108c4 LP |
1260 | int readlink_and_make_absolute(const char *p, char **r) { |
1261 | char *target, *k; | |
1262 | int j; | |
1263 | ||
1264 | assert(p); | |
1265 | assert(r); | |
1266 | ||
1267 | if ((j = readlink_malloc(p, &target)) < 0) | |
1268 | return j; | |
1269 | ||
1270 | k = file_in_same_dir(p, target); | |
1271 | free(target); | |
1272 | ||
1273 | if (!k) | |
1274 | return -ENOMEM; | |
1275 | ||
1276 | *r = k; | |
1277 | return 0; | |
1278 | } | |
1279 | ||
83096483 LP |
1280 | int readlink_and_canonicalize(const char *p, char **r) { |
1281 | char *t, *s; | |
1282 | int j; | |
1283 | ||
1284 | assert(p); | |
1285 | assert(r); | |
1286 | ||
1287 | j = readlink_and_make_absolute(p, &t); | |
1288 | if (j < 0) | |
1289 | return j; | |
1290 | ||
1291 | s = canonicalize_file_name(t); | |
1292 | if (s) { | |
1293 | free(t); | |
1294 | *r = s; | |
1295 | } else | |
1296 | *r = t; | |
1297 | ||
1298 | path_kill_slashes(*r); | |
1299 | ||
1300 | return 0; | |
1301 | } | |
1302 | ||
2a987ee8 LP |
1303 | int reset_all_signal_handlers(void) { |
1304 | int sig; | |
1305 | ||
1306 | for (sig = 1; sig < _NSIG; sig++) { | |
1307 | struct sigaction sa; | |
1308 | ||
1309 | if (sig == SIGKILL || sig == SIGSTOP) | |
1310 | continue; | |
1311 | ||
1312 | zero(sa); | |
1313 | sa.sa_handler = SIG_DFL; | |
431c32bf | 1314 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
1315 | |
1316 | /* On Linux the first two RT signals are reserved by | |
1317 | * glibc, and sigaction() will return EINVAL for them. */ | |
1318 | if ((sigaction(sig, &sa, NULL) < 0)) | |
1319 | if (errno != EINVAL) | |
1320 | return -errno; | |
1321 | } | |
1322 | ||
8e274523 | 1323 | return 0; |
2a987ee8 | 1324 | } |
4a72ff34 LP |
1325 | |
1326 | char *strstrip(char *s) { | |
57a8eca8 | 1327 | char *e; |
4a72ff34 LP |
1328 | |
1329 | /* Drops trailing whitespace. Modifies the string in | |
1330 | * place. Returns pointer to first non-space character */ | |
1331 | ||
1332 | s += strspn(s, WHITESPACE); | |
1333 | ||
57a8eca8 LP |
1334 | for (e = strchr(s, 0); e > s; e --) |
1335 | if (!strchr(WHITESPACE, e[-1])) | |
1336 | break; | |
4a72ff34 | 1337 | |
57a8eca8 | 1338 | *e = 0; |
4a72ff34 LP |
1339 | |
1340 | return s; | |
4a72ff34 LP |
1341 | } |
1342 | ||
ee9b5e01 LP |
1343 | char *delete_chars(char *s, const char *bad) { |
1344 | char *f, *t; | |
1345 | ||
1346 | /* Drops all whitespace, regardless where in the string */ | |
1347 | ||
1348 | for (f = s, t = s; *f; f++) { | |
1349 | if (strchr(bad, *f)) | |
1350 | continue; | |
1351 | ||
1352 | *(t++) = *f; | |
1353 | } | |
1354 | ||
1355 | *t = 0; | |
1356 | ||
1357 | return s; | |
1358 | } | |
1359 | ||
ab1f0633 LP |
1360 | bool in_charset(const char *s, const char* charset) { |
1361 | const char *i; | |
1362 | ||
1363 | assert(s); | |
1364 | assert(charset); | |
1365 | ||
1366 | for (i = s; *i; i++) | |
1367 | if (!strchr(charset, *i)) | |
1368 | return false; | |
1369 | ||
1370 | return true; | |
1371 | } | |
1372 | ||
4a72ff34 LP |
1373 | char *file_in_same_dir(const char *path, const char *filename) { |
1374 | char *e, *r; | |
1375 | size_t k; | |
1376 | ||
1377 | assert(path); | |
1378 | assert(filename); | |
1379 | ||
1380 | /* This removes the last component of path and appends | |
1381 | * filename, unless the latter is absolute anyway or the | |
1382 | * former isn't */ | |
1383 | ||
1384 | if (path_is_absolute(filename)) | |
1385 | return strdup(filename); | |
1386 | ||
1387 | if (!(e = strrchr(path, '/'))) | |
1388 | return strdup(filename); | |
1389 | ||
1390 | k = strlen(filename); | |
1391 | if (!(r = new(char, e-path+1+k+1))) | |
1392 | return NULL; | |
1393 | ||
1394 | memcpy(r, path, e-path+1); | |
1395 | memcpy(r+(e-path)+1, filename, k+1); | |
1396 | ||
1397 | return r; | |
1398 | } | |
fb624d04 | 1399 | |
c32dd69b LP |
1400 | int rmdir_parents(const char *path, const char *stop) { |
1401 | size_t l; | |
1402 | int r = 0; | |
1403 | ||
1404 | assert(path); | |
1405 | assert(stop); | |
1406 | ||
1407 | l = strlen(path); | |
1408 | ||
1409 | /* Skip trailing slashes */ | |
1410 | while (l > 0 && path[l-1] == '/') | |
1411 | l--; | |
1412 | ||
1413 | while (l > 0) { | |
1414 | char *t; | |
1415 | ||
1416 | /* Skip last component */ | |
1417 | while (l > 0 && path[l-1] != '/') | |
1418 | l--; | |
1419 | ||
1420 | /* Skip trailing slashes */ | |
1421 | while (l > 0 && path[l-1] == '/') | |
1422 | l--; | |
1423 | ||
1424 | if (l <= 0) | |
1425 | break; | |
1426 | ||
1427 | if (!(t = strndup(path, l))) | |
1428 | return -ENOMEM; | |
1429 | ||
1430 | if (path_startswith(stop, t)) { | |
1431 | free(t); | |
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | r = rmdir(t); | |
1436 | free(t); | |
1437 | ||
1438 | if (r < 0) | |
1439 | if (errno != ENOENT) | |
1440 | return -errno; | |
1441 | } | |
1442 | ||
1443 | return 0; | |
1444 | } | |
1445 | ||
1446 | ||
fb624d04 LP |
1447 | char hexchar(int x) { |
1448 | static const char table[16] = "0123456789abcdef"; | |
1449 | ||
1450 | return table[x & 15]; | |
1451 | } | |
4fe88d28 LP |
1452 | |
1453 | int unhexchar(char c) { | |
1454 | ||
1455 | if (c >= '0' && c <= '9') | |
1456 | return c - '0'; | |
1457 | ||
1458 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1459 | return c - 'a' + 10; |
4fe88d28 LP |
1460 | |
1461 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1462 | return c - 'A' + 10; |
4fe88d28 LP |
1463 | |
1464 | return -1; | |
1465 | } | |
1466 | ||
1467 | char octchar(int x) { | |
1468 | return '0' + (x & 7); | |
1469 | } | |
1470 | ||
1471 | int unoctchar(char c) { | |
1472 | ||
1473 | if (c >= '0' && c <= '7') | |
1474 | return c - '0'; | |
1475 | ||
1476 | return -1; | |
1477 | } | |
1478 | ||
5af98f82 LP |
1479 | char decchar(int x) { |
1480 | return '0' + (x % 10); | |
1481 | } | |
1482 | ||
1483 | int undecchar(char c) { | |
1484 | ||
1485 | if (c >= '0' && c <= '9') | |
1486 | return c - '0'; | |
1487 | ||
1488 | return -1; | |
1489 | } | |
1490 | ||
4fe88d28 LP |
1491 | char *cescape(const char *s) { |
1492 | char *r, *t; | |
1493 | const char *f; | |
1494 | ||
1495 | assert(s); | |
1496 | ||
1497 | /* Does C style string escaping. */ | |
1498 | ||
f8e2fb7b LP |
1499 | r = new(char, strlen(s)*4 + 1); |
1500 | if (!r) | |
4fe88d28 LP |
1501 | return NULL; |
1502 | ||
1503 | for (f = s, t = r; *f; f++) | |
1504 | ||
1505 | switch (*f) { | |
1506 | ||
1507 | case '\a': | |
1508 | *(t++) = '\\'; | |
1509 | *(t++) = 'a'; | |
1510 | break; | |
1511 | case '\b': | |
1512 | *(t++) = '\\'; | |
1513 | *(t++) = 'b'; | |
1514 | break; | |
1515 | case '\f': | |
1516 | *(t++) = '\\'; | |
1517 | *(t++) = 'f'; | |
1518 | break; | |
1519 | case '\n': | |
1520 | *(t++) = '\\'; | |
1521 | *(t++) = 'n'; | |
1522 | break; | |
1523 | case '\r': | |
1524 | *(t++) = '\\'; | |
1525 | *(t++) = 'r'; | |
1526 | break; | |
1527 | case '\t': | |
1528 | *(t++) = '\\'; | |
1529 | *(t++) = 't'; | |
1530 | break; | |
1531 | case '\v': | |
1532 | *(t++) = '\\'; | |
1533 | *(t++) = 'v'; | |
1534 | break; | |
1535 | case '\\': | |
1536 | *(t++) = '\\'; | |
1537 | *(t++) = '\\'; | |
1538 | break; | |
1539 | case '"': | |
1540 | *(t++) = '\\'; | |
1541 | *(t++) = '"'; | |
1542 | break; | |
1543 | case '\'': | |
1544 | *(t++) = '\\'; | |
1545 | *(t++) = '\''; | |
1546 | break; | |
1547 | ||
1548 | default: | |
1549 | /* For special chars we prefer octal over | |
1550 | * hexadecimal encoding, simply because glib's | |
1551 | * g_strescape() does the same */ | |
1552 | if ((*f < ' ') || (*f >= 127)) { | |
1553 | *(t++) = '\\'; | |
1554 | *(t++) = octchar((unsigned char) *f >> 6); | |
1555 | *(t++) = octchar((unsigned char) *f >> 3); | |
1556 | *(t++) = octchar((unsigned char) *f); | |
1557 | } else | |
1558 | *(t++) = *f; | |
1559 | break; | |
1560 | } | |
1561 | ||
1562 | *t = 0; | |
1563 | ||
1564 | return r; | |
1565 | } | |
1566 | ||
6febfd0d | 1567 | char *cunescape_length(const char *s, size_t length) { |
4fe88d28 LP |
1568 | char *r, *t; |
1569 | const char *f; | |
1570 | ||
1571 | assert(s); | |
1572 | ||
1573 | /* Undoes C style string escaping */ | |
1574 | ||
7f110ff9 LP |
1575 | r = new(char, length+1); |
1576 | if (!r) | |
4fe88d28 LP |
1577 | return r; |
1578 | ||
6febfd0d | 1579 | for (f = s, t = r; f < s + length; f++) { |
4fe88d28 LP |
1580 | |
1581 | if (*f != '\\') { | |
1582 | *(t++) = *f; | |
1583 | continue; | |
1584 | } | |
1585 | ||
1586 | f++; | |
1587 | ||
1588 | switch (*f) { | |
1589 | ||
1590 | case 'a': | |
1591 | *(t++) = '\a'; | |
1592 | break; | |
1593 | case 'b': | |
1594 | *(t++) = '\b'; | |
1595 | break; | |
1596 | case 'f': | |
1597 | *(t++) = '\f'; | |
1598 | break; | |
1599 | case 'n': | |
1600 | *(t++) = '\n'; | |
1601 | break; | |
1602 | case 'r': | |
1603 | *(t++) = '\r'; | |
1604 | break; | |
1605 | case 't': | |
1606 | *(t++) = '\t'; | |
1607 | break; | |
1608 | case 'v': | |
1609 | *(t++) = '\v'; | |
1610 | break; | |
1611 | case '\\': | |
1612 | *(t++) = '\\'; | |
1613 | break; | |
1614 | case '"': | |
1615 | *(t++) = '"'; | |
1616 | break; | |
1617 | case '\'': | |
1618 | *(t++) = '\''; | |
1619 | break; | |
1620 | ||
e167fb86 LP |
1621 | case 's': |
1622 | /* This is an extension of the XDG syntax files */ | |
1623 | *(t++) = ' '; | |
1624 | break; | |
1625 | ||
4fe88d28 LP |
1626 | case 'x': { |
1627 | /* hexadecimal encoding */ | |
1628 | int a, b; | |
1629 | ||
7f110ff9 LP |
1630 | a = unhexchar(f[1]); |
1631 | b = unhexchar(f[2]); | |
1632 | ||
1633 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1634 | /* Invalid escape code, let's take it literal then */ |
1635 | *(t++) = '\\'; | |
1636 | *(t++) = 'x'; | |
1637 | } else { | |
1638 | *(t++) = (char) ((a << 4) | b); | |
1639 | f += 2; | |
1640 | } | |
1641 | ||
1642 | break; | |
1643 | } | |
1644 | ||
1645 | case '0': | |
1646 | case '1': | |
1647 | case '2': | |
1648 | case '3': | |
1649 | case '4': | |
1650 | case '5': | |
1651 | case '6': | |
1652 | case '7': { | |
1653 | /* octal encoding */ | |
1654 | int a, b, c; | |
1655 | ||
7f110ff9 LP |
1656 | a = unoctchar(f[0]); |
1657 | b = unoctchar(f[1]); | |
1658 | c = unoctchar(f[2]); | |
1659 | ||
1660 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1661 | /* Invalid escape code, let's take it literal then */ |
1662 | *(t++) = '\\'; | |
1663 | *(t++) = f[0]; | |
1664 | } else { | |
1665 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1666 | f += 2; | |
1667 | } | |
1668 | ||
1669 | break; | |
1670 | } | |
1671 | ||
1672 | case 0: | |
1673 | /* premature end of string.*/ | |
1674 | *(t++) = '\\'; | |
1675 | goto finish; | |
1676 | ||
1677 | default: | |
1678 | /* Invalid escape code, let's take it literal then */ | |
1679 | *(t++) = '\\'; | |
f3d4cc01 | 1680 | *(t++) = *f; |
4fe88d28 LP |
1681 | break; |
1682 | } | |
1683 | } | |
1684 | ||
1685 | finish: | |
1686 | *t = 0; | |
1687 | return r; | |
1688 | } | |
1689 | ||
6febfd0d LP |
1690 | char *cunescape(const char *s) { |
1691 | return cunescape_length(s, strlen(s)); | |
1692 | } | |
4fe88d28 LP |
1693 | |
1694 | char *xescape(const char *s, const char *bad) { | |
1695 | char *r, *t; | |
1696 | const char *f; | |
1697 | ||
1698 | /* Escapes all chars in bad, in addition to \ and all special | |
1699 | * chars, in \xFF style escaping. May be reversed with | |
1700 | * cunescape. */ | |
1701 | ||
1702 | if (!(r = new(char, strlen(s)*4+1))) | |
1703 | return NULL; | |
1704 | ||
1705 | for (f = s, t = r; *f; f++) { | |
1706 | ||
b866264a LP |
1707 | if ((*f < ' ') || (*f >= 127) || |
1708 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1709 | *(t++) = '\\'; |
1710 | *(t++) = 'x'; | |
1711 | *(t++) = hexchar(*f >> 4); | |
1712 | *(t++) = hexchar(*f); | |
1713 | } else | |
1714 | *(t++) = *f; | |
1715 | } | |
1716 | ||
1717 | *t = 0; | |
1718 | ||
1719 | return r; | |
1720 | } | |
1721 | ||
ea430986 | 1722 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1723 | char *r, *t; |
1724 | const char *f; | |
1725 | ||
47be870b LP |
1726 | assert(s); |
1727 | ||
ea430986 LP |
1728 | /* Escapes all chars that D-Bus' object path cannot deal |
1729 | * with. Can be reverse with bus_path_unescape() */ | |
1730 | ||
1731 | if (!(r = new(char, strlen(s)*3+1))) | |
1732 | return NULL; | |
1733 | ||
1734 | for (f = s, t = r; *f; f++) { | |
1735 | ||
1736 | if (!(*f >= 'A' && *f <= 'Z') && | |
1737 | !(*f >= 'a' && *f <= 'z') && | |
1738 | !(*f >= '0' && *f <= '9')) { | |
1739 | *(t++) = '_'; | |
1740 | *(t++) = hexchar(*f >> 4); | |
1741 | *(t++) = hexchar(*f); | |
1742 | } else | |
1743 | *(t++) = *f; | |
1744 | } | |
1745 | ||
1746 | *t = 0; | |
1747 | ||
1748 | return r; | |
1749 | } | |
1750 | ||
9e2f7c11 | 1751 | char *bus_path_unescape(const char *f) { |
ea430986 | 1752 | char *r, *t; |
ea430986 | 1753 | |
9e2f7c11 | 1754 | assert(f); |
47be870b | 1755 | |
9e2f7c11 | 1756 | if (!(r = strdup(f))) |
ea430986 LP |
1757 | return NULL; |
1758 | ||
9e2f7c11 | 1759 | for (t = r; *f; f++) { |
ea430986 LP |
1760 | |
1761 | if (*f == '_') { | |
1762 | int a, b; | |
1763 | ||
1764 | if ((a = unhexchar(f[1])) < 0 || | |
1765 | (b = unhexchar(f[2])) < 0) { | |
1766 | /* Invalid escape code, let's take it literal then */ | |
1767 | *(t++) = '_'; | |
1768 | } else { | |
1769 | *(t++) = (char) ((a << 4) | b); | |
1770 | f += 2; | |
1771 | } | |
1772 | } else | |
1773 | *(t++) = *f; | |
1774 | } | |
1775 | ||
1776 | *t = 0; | |
1777 | ||
1778 | return r; | |
1779 | } | |
1780 | ||
67d51650 | 1781 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1782 | char *p; |
1783 | ||
67d51650 | 1784 | assert(t); |
4fe88d28 | 1785 | |
67d51650 | 1786 | for (p = t; *p; p++) |
4fe88d28 LP |
1787 | if (*p >= 'A' && *p <= 'Z') |
1788 | *p = *p - 'A' + 'a'; | |
1789 | ||
67d51650 | 1790 | return t; |
4fe88d28 | 1791 | } |
1dccbe19 | 1792 | |
c85dc17b LP |
1793 | bool ignore_file(const char *filename) { |
1794 | assert(filename); | |
1795 | ||
1796 | return | |
1797 | filename[0] == '.' || | |
6c78be3c | 1798 | streq(filename, "lost+found") || |
e472d476 LP |
1799 | streq(filename, "aquota.user") || |
1800 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1801 | endswith(filename, "~") || |
1802 | endswith(filename, ".rpmnew") || | |
1803 | endswith(filename, ".rpmsave") || | |
1804 | endswith(filename, ".rpmorig") || | |
1805 | endswith(filename, ".dpkg-old") || | |
1806 | endswith(filename, ".dpkg-new") || | |
1807 | endswith(filename, ".swp"); | |
1808 | } | |
1809 | ||
3a0ecb08 LP |
1810 | int fd_nonblock(int fd, bool nonblock) { |
1811 | int flags; | |
1812 | ||
1813 | assert(fd >= 0); | |
1814 | ||
1815 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1816 | return -errno; | |
1817 | ||
1818 | if (nonblock) | |
1819 | flags |= O_NONBLOCK; | |
1820 | else | |
1821 | flags &= ~O_NONBLOCK; | |
1822 | ||
1823 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1824 | return -errno; | |
1825 | ||
1826 | return 0; | |
1827 | } | |
1828 | ||
1829 | int fd_cloexec(int fd, bool cloexec) { | |
1830 | int flags; | |
1831 | ||
1832 | assert(fd >= 0); | |
1833 | ||
1834 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1835 | return -errno; | |
1836 | ||
1837 | if (cloexec) | |
1838 | flags |= FD_CLOEXEC; | |
1839 | else | |
1840 | flags &= ~FD_CLOEXEC; | |
1841 | ||
1842 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1843 | return -errno; | |
1844 | ||
1845 | return 0; | |
1846 | } | |
1847 | ||
b19be9eb LP |
1848 | static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
1849 | unsigned i; | |
1850 | ||
1851 | assert(n_fdset == 0 || fdset); | |
1852 | ||
1853 | for (i = 0; i < n_fdset; i++) | |
1854 | if (fdset[i] == fd) | |
1855 | return true; | |
1856 | ||
1857 | return false; | |
1858 | } | |
1859 | ||
a0d40ac5 LP |
1860 | int close_all_fds(const int except[], unsigned n_except) { |
1861 | DIR *d; | |
1862 | struct dirent *de; | |
1863 | int r = 0; | |
1864 | ||
b19be9eb LP |
1865 | assert(n_except == 0 || except); |
1866 | ||
1867 | d = opendir("/proc/self/fd"); | |
1868 | if (!d) { | |
1869 | int fd; | |
1870 | struct rlimit rl; | |
1871 | ||
1872 | /* When /proc isn't available (for example in chroots) | |
1873 | * the fallback is brute forcing through the fd | |
1874 | * table */ | |
1875 | ||
1876 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1877 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1878 | ||
1879 | if (fd_in_set(fd, except, n_except)) | |
1880 | continue; | |
1881 | ||
1882 | if (close_nointr(fd) < 0) | |
1883 | if (errno != EBADF && r == 0) | |
1884 | r = -errno; | |
1885 | } | |
1886 | ||
1887 | return r; | |
1888 | } | |
a0d40ac5 LP |
1889 | |
1890 | while ((de = readdir(d))) { | |
a7610064 | 1891 | int fd = -1; |
a0d40ac5 | 1892 | |
a16e1123 | 1893 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1894 | continue; |
1895 | ||
720ce21d LP |
1896 | if (safe_atoi(de->d_name, &fd) < 0) |
1897 | /* Let's better ignore this, just in case */ | |
1898 | continue; | |
a0d40ac5 LP |
1899 | |
1900 | if (fd < 3) | |
1901 | continue; | |
1902 | ||
1903 | if (fd == dirfd(d)) | |
1904 | continue; | |
1905 | ||
b19be9eb LP |
1906 | if (fd_in_set(fd, except, n_except)) |
1907 | continue; | |
a0d40ac5 | 1908 | |
720ce21d | 1909 | if (close_nointr(fd) < 0) { |
2f357920 | 1910 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1911 | if (errno != EBADF && r == 0) |
1912 | r = -errno; | |
2f357920 | 1913 | } |
a0d40ac5 LP |
1914 | } |
1915 | ||
a0d40ac5 LP |
1916 | closedir(d); |
1917 | return r; | |
1918 | } | |
1919 | ||
db12775d LP |
1920 | bool chars_intersect(const char *a, const char *b) { |
1921 | const char *p; | |
1922 | ||
1923 | /* Returns true if any of the chars in a are in b. */ | |
1924 | for (p = a; *p; p++) | |
1925 | if (strchr(b, *p)) | |
1926 | return true; | |
1927 | ||
1928 | return false; | |
1929 | } | |
1930 | ||
8b6c7120 LP |
1931 | char *format_timestamp(char *buf, size_t l, usec_t t) { |
1932 | struct tm tm; | |
1933 | time_t sec; | |
1934 | ||
1935 | assert(buf); | |
1936 | assert(l > 0); | |
1937 | ||
1938 | if (t <= 0) | |
1939 | return NULL; | |
1940 | ||
f872ec33 | 1941 | sec = (time_t) (t / USEC_PER_SEC); |
8b6c7120 LP |
1942 | |
1943 | if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0) | |
1944 | return NULL; | |
1945 | ||
1946 | return buf; | |
1947 | } | |
1948 | ||
584be568 LP |
1949 | char *format_timestamp_pretty(char *buf, size_t l, usec_t t) { |
1950 | usec_t n, d; | |
1951 | ||
1952 | n = now(CLOCK_REALTIME); | |
1953 | ||
1954 | if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) | |
1955 | return NULL; | |
1956 | ||
1957 | d = n - t; | |
1958 | ||
1959 | if (d >= USEC_PER_YEAR) | |
1960 | snprintf(buf, l, "%llu years and %llu months ago", | |
1961 | (unsigned long long) (d / USEC_PER_YEAR), | |
1962 | (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); | |
1963 | else if (d >= USEC_PER_MONTH) | |
1964 | snprintf(buf, l, "%llu months and %llu days ago", | |
1965 | (unsigned long long) (d / USEC_PER_MONTH), | |
1966 | (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); | |
1967 | else if (d >= USEC_PER_WEEK) | |
1968 | snprintf(buf, l, "%llu weeks and %llu days ago", | |
1969 | (unsigned long long) (d / USEC_PER_WEEK), | |
1970 | (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); | |
1971 | else if (d >= 2*USEC_PER_DAY) | |
1972 | snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); | |
1973 | else if (d >= 25*USEC_PER_HOUR) | |
1974 | snprintf(buf, l, "1 day and %lluh ago", | |
1975 | (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); | |
1976 | else if (d >= 6*USEC_PER_HOUR) | |
1977 | snprintf(buf, l, "%lluh ago", | |
1978 | (unsigned long long) (d / USEC_PER_HOUR)); | |
1979 | else if (d >= USEC_PER_HOUR) | |
1980 | snprintf(buf, l, "%lluh %llumin ago", | |
1981 | (unsigned long long) (d / USEC_PER_HOUR), | |
1982 | (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); | |
1983 | else if (d >= 5*USEC_PER_MINUTE) | |
1984 | snprintf(buf, l, "%llumin ago", | |
1985 | (unsigned long long) (d / USEC_PER_MINUTE)); | |
1986 | else if (d >= USEC_PER_MINUTE) | |
1987 | snprintf(buf, l, "%llumin %llus ago", | |
1988 | (unsigned long long) (d / USEC_PER_MINUTE), | |
1989 | (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); | |
1990 | else if (d >= USEC_PER_SEC) | |
1991 | snprintf(buf, l, "%llus ago", | |
1992 | (unsigned long long) (d / USEC_PER_SEC)); | |
1993 | else if (d >= USEC_PER_MSEC) | |
1994 | snprintf(buf, l, "%llums ago", | |
1995 | (unsigned long long) (d / USEC_PER_MSEC)); | |
1996 | else if (d > 0) | |
1997 | snprintf(buf, l, "%lluus ago", | |
1998 | (unsigned long long) d); | |
1999 | else | |
2000 | snprintf(buf, l, "now"); | |
2001 | ||
2002 | buf[l-1] = 0; | |
2003 | return buf; | |
2004 | } | |
2005 | ||
871d7de4 LP |
2006 | char *format_timespan(char *buf, size_t l, usec_t t) { |
2007 | static const struct { | |
2008 | const char *suffix; | |
2009 | usec_t usec; | |
2010 | } table[] = { | |
2011 | { "w", USEC_PER_WEEK }, | |
2012 | { "d", USEC_PER_DAY }, | |
2013 | { "h", USEC_PER_HOUR }, | |
2014 | { "min", USEC_PER_MINUTE }, | |
2015 | { "s", USEC_PER_SEC }, | |
2016 | { "ms", USEC_PER_MSEC }, | |
2017 | { "us", 1 }, | |
2018 | }; | |
2019 | ||
2020 | unsigned i; | |
2021 | char *p = buf; | |
2022 | ||
2023 | assert(buf); | |
2024 | assert(l > 0); | |
2025 | ||
2026 | if (t == (usec_t) -1) | |
2027 | return NULL; | |
2028 | ||
4502d22c LP |
2029 | if (t == 0) { |
2030 | snprintf(p, l, "0"); | |
2031 | p[l-1] = 0; | |
2032 | return p; | |
2033 | } | |
2034 | ||
871d7de4 LP |
2035 | /* The result of this function can be parsed with parse_usec */ |
2036 | ||
2037 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
2038 | int k; | |
2039 | size_t n; | |
2040 | ||
2041 | if (t < table[i].usec) | |
2042 | continue; | |
2043 | ||
2044 | if (l <= 1) | |
2045 | break; | |
2046 | ||
2047 | k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix); | |
2048 | n = MIN((size_t) k, l); | |
2049 | ||
2050 | l -= n; | |
2051 | p += n; | |
2052 | ||
2053 | t %= table[i].usec; | |
2054 | } | |
2055 | ||
2056 | *p = 0; | |
2057 | ||
2058 | return buf; | |
2059 | } | |
2060 | ||
42856c10 LP |
2061 | bool fstype_is_network(const char *fstype) { |
2062 | static const char * const table[] = { | |
2063 | "cifs", | |
2064 | "smbfs", | |
2065 | "ncpfs", | |
2066 | "nfs", | |
ca139f94 LP |
2067 | "nfs4", |
2068 | "gfs", | |
2069 | "gfs2" | |
42856c10 LP |
2070 | }; |
2071 | ||
2072 | unsigned i; | |
2073 | ||
2074 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2075 | if (streq(table[i], fstype)) | |
2076 | return true; | |
2077 | ||
2078 | return false; | |
2079 | } | |
2080 | ||
601f6a1e LP |
2081 | int chvt(int vt) { |
2082 | int fd, r = 0; | |
2083 | ||
74bc3bdc | 2084 | if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) |
601f6a1e LP |
2085 | return -errno; |
2086 | ||
2087 | if (vt < 0) { | |
2088 | int tiocl[2] = { | |
2089 | TIOCL_GETKMSGREDIRECT, | |
2090 | 0 | |
2091 | }; | |
2092 | ||
678abaf9 TJ |
2093 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) { |
2094 | r = -errno; | |
2095 | goto fail; | |
2096 | } | |
601f6a1e LP |
2097 | |
2098 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
2099 | } | |
2100 | ||
2101 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
2102 | r = -errno; | |
2103 | ||
678abaf9 TJ |
2104 | fail: |
2105 | close_nointr_nofail(fd); | |
601f6a1e LP |
2106 | return r; |
2107 | } | |
2108 | ||
8f2d43a0 | 2109 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
2110 | struct termios old_termios, new_termios; |
2111 | char c; | |
20c03b7b | 2112 | char line[LINE_MAX]; |
80876c20 LP |
2113 | |
2114 | assert(f); | |
2115 | assert(ret); | |
2116 | ||
2117 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
2118 | new_termios = old_termios; | |
2119 | ||
2120 | new_termios.c_lflag &= ~ICANON; | |
2121 | new_termios.c_cc[VMIN] = 1; | |
2122 | new_termios.c_cc[VTIME] = 0; | |
2123 | ||
2124 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
2125 | size_t k; | |
2126 | ||
8f2d43a0 LP |
2127 | if (t != (usec_t) -1) { |
2128 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
2129 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2130 | return -ETIMEDOUT; | |
2131 | } | |
2132 | } | |
2133 | ||
80876c20 LP |
2134 | k = fread(&c, 1, 1, f); |
2135 | ||
2136 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2137 | ||
2138 | if (k <= 0) | |
2139 | return -EIO; | |
2140 | ||
2141 | if (need_nl) | |
2142 | *need_nl = c != '\n'; | |
2143 | ||
2144 | *ret = c; | |
2145 | return 0; | |
2146 | } | |
2147 | } | |
2148 | ||
8f2d43a0 LP |
2149 | if (t != (usec_t) -1) |
2150 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
2151 | return -ETIMEDOUT; | |
2152 | ||
2153 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
2154 | return -EIO; |
2155 | ||
2156 | truncate_nl(line); | |
2157 | ||
2158 | if (strlen(line) != 1) | |
2159 | return -EBADMSG; | |
2160 | ||
2161 | if (need_nl) | |
2162 | *need_nl = false; | |
2163 | ||
2164 | *ret = line[0]; | |
2165 | return 0; | |
2166 | } | |
2167 | ||
2168 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 LP |
2169 | bool on_tty; |
2170 | ||
80876c20 LP |
2171 | assert(ret); |
2172 | assert(replies); | |
2173 | assert(text); | |
2174 | ||
1b39d4b9 LP |
2175 | on_tty = isatty(STDOUT_FILENO); |
2176 | ||
80876c20 LP |
2177 | for (;;) { |
2178 | va_list ap; | |
2179 | char c; | |
2180 | int r; | |
2181 | bool need_nl = true; | |
2182 | ||
1b39d4b9 | 2183 | if (on_tty) |
c1072ea0 | 2184 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 2185 | |
80876c20 LP |
2186 | va_start(ap, text); |
2187 | vprintf(text, ap); | |
2188 | va_end(ap); | |
2189 | ||
1b39d4b9 | 2190 | if (on_tty) |
c1072ea0 | 2191 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 2192 | |
80876c20 LP |
2193 | fflush(stdout); |
2194 | ||
8f2d43a0 LP |
2195 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
2196 | if (r < 0) { | |
80876c20 LP |
2197 | |
2198 | if (r == -EBADMSG) { | |
2199 | puts("Bad input, please try again."); | |
2200 | continue; | |
2201 | } | |
2202 | ||
2203 | putchar('\n'); | |
2204 | return r; | |
2205 | } | |
2206 | ||
2207 | if (need_nl) | |
2208 | putchar('\n'); | |
2209 | ||
2210 | if (strchr(replies, c)) { | |
2211 | *ret = c; | |
2212 | return 0; | |
2213 | } | |
2214 | ||
2215 | puts("Read unexpected character, please try again."); | |
2216 | } | |
2217 | } | |
2218 | ||
512947d4 | 2219 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
2220 | struct termios termios; |
2221 | int r = 0; | |
3fe5e5d4 LP |
2222 | |
2223 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
2224 | |
2225 | assert(fd >= 0); | |
2226 | ||
eed1d0e3 LP |
2227 | /* We leave locked terminal attributes untouched, so that |
2228 | * Plymouth may set whatever it wants to set, and we don't | |
2229 | * interfere with that. */ | |
3fe5e5d4 LP |
2230 | |
2231 | /* Disable exclusive mode, just in case */ | |
2232 | ioctl(fd, TIOCNXCL); | |
2233 | ||
5c0100a5 | 2234 | /* Switch to text mode */ |
512947d4 MS |
2235 | if (switch_to_text) |
2236 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 2237 | |
3fe5e5d4 | 2238 | /* Enable console unicode mode */ |
df465b3f | 2239 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
2240 | |
2241 | if (tcgetattr(fd, &termios) < 0) { | |
2242 | r = -errno; | |
2243 | goto finish; | |
2244 | } | |
2245 | ||
aaf694ca LP |
2246 | /* We only reset the stuff that matters to the software. How |
2247 | * hardware is set up we don't touch assuming that somebody | |
2248 | * else will do that for us */ | |
2249 | ||
2250 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
2251 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
2252 | termios.c_oflag |= ONLCR; | |
2253 | termios.c_cflag |= CREAD; | |
2254 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
2255 | ||
2256 | termios.c_cc[VINTR] = 03; /* ^C */ | |
2257 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
2258 | termios.c_cc[VERASE] = 0177; | |
2259 | termios.c_cc[VKILL] = 025; /* ^X */ | |
2260 | termios.c_cc[VEOF] = 04; /* ^D */ | |
2261 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
2262 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
2263 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
2264 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
2265 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
2266 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
2267 | termios.c_cc[VEOL] = 0; |
2268 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
2269 | |
2270 | termios.c_cc[VTIME] = 0; | |
2271 | termios.c_cc[VMIN] = 1; | |
2272 | ||
2273 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
2274 | r = -errno; | |
2275 | ||
2276 | finish: | |
2277 | /* Just in case, flush all crap out */ | |
2278 | tcflush(fd, TCIOFLUSH); | |
2279 | ||
2280 | return r; | |
2281 | } | |
2282 | ||
6ea832a2 LP |
2283 | int reset_terminal(const char *name) { |
2284 | int fd, r; | |
2285 | ||
2286 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
2287 | if (fd < 0) | |
2288 | return fd; | |
2289 | ||
512947d4 | 2290 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
2291 | close_nointr_nofail(fd); |
2292 | ||
2293 | return r; | |
2294 | } | |
2295 | ||
80876c20 LP |
2296 | int open_terminal(const char *name, int mode) { |
2297 | int fd, r; | |
f73f76ac | 2298 | unsigned c = 0; |
80876c20 | 2299 | |
f73f76ac LP |
2300 | /* |
2301 | * If a TTY is in the process of being closed opening it might | |
2302 | * cause EIO. This is horribly awful, but unlikely to be | |
2303 | * changed in the kernel. Hence we work around this problem by | |
2304 | * retrying a couple of times. | |
2305 | * | |
2306 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
2307 | */ | |
2308 | ||
2309 | for (;;) { | |
af6da548 LP |
2310 | fd = open(name, mode); |
2311 | if (fd >= 0) | |
f73f76ac LP |
2312 | break; |
2313 | ||
2314 | if (errno != EIO) | |
2315 | return -errno; | |
2316 | ||
af6da548 | 2317 | /* Max 1s in total */ |
f73f76ac LP |
2318 | if (c >= 20) |
2319 | return -errno; | |
2320 | ||
2321 | usleep(50 * USEC_PER_MSEC); | |
2322 | c++; | |
2323 | } | |
2324 | ||
2325 | if (fd < 0) | |
80876c20 LP |
2326 | return -errno; |
2327 | ||
af6da548 LP |
2328 | r = isatty(fd); |
2329 | if (r < 0) { | |
80876c20 LP |
2330 | close_nointr_nofail(fd); |
2331 | return -errno; | |
2332 | } | |
2333 | ||
2334 | if (!r) { | |
2335 | close_nointr_nofail(fd); | |
2336 | return -ENOTTY; | |
2337 | } | |
2338 | ||
2339 | return fd; | |
2340 | } | |
2341 | ||
2342 | int flush_fd(int fd) { | |
2343 | struct pollfd pollfd; | |
2344 | ||
2345 | zero(pollfd); | |
2346 | pollfd.fd = fd; | |
2347 | pollfd.events = POLLIN; | |
2348 | ||
2349 | for (;;) { | |
20c03b7b | 2350 | char buf[LINE_MAX]; |
80876c20 LP |
2351 | ssize_t l; |
2352 | int r; | |
2353 | ||
2354 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2355 | ||
2356 | if (errno == EINTR) | |
2357 | continue; | |
2358 | ||
2359 | return -errno; | |
2360 | } | |
2361 | ||
2362 | if (r == 0) | |
2363 | return 0; | |
2364 | ||
2365 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2366 | ||
2367 | if (errno == EINTR) | |
2368 | continue; | |
2369 | ||
2370 | if (errno == EAGAIN) | |
2371 | return 0; | |
2372 | ||
2373 | return -errno; | |
2374 | } | |
2375 | ||
2376 | if (l <= 0) | |
2377 | return 0; | |
2378 | } | |
2379 | } | |
2380 | ||
af6da548 LP |
2381 | int acquire_terminal( |
2382 | const char *name, | |
2383 | bool fail, | |
2384 | bool force, | |
2385 | bool ignore_tiocstty_eperm, | |
2386 | usec_t timeout) { | |
2387 | ||
4a0ff478 | 2388 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 2389 | usec_t ts = 0; |
32c4bef8 | 2390 | struct sigaction sa_old, sa_new; |
80876c20 LP |
2391 | |
2392 | assert(name); | |
2393 | ||
2394 | /* We use inotify to be notified when the tty is closed. We | |
2395 | * create the watch before checking if we can actually acquire | |
2396 | * it, so that we don't lose any event. | |
2397 | * | |
2398 | * Note: strictly speaking this actually watches for the | |
2399 | * device being closed, it does *not* really watch whether a | |
2400 | * tty loses its controlling process. However, unless some | |
2401 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2402 | * its tty otherwise this will not become a problem. As long | |
2403 | * as the administrator makes sure not configure any service | |
2404 | * on the same tty as an untrusted user this should not be a | |
2405 | * problem. (Which he probably should not do anyway.) */ | |
2406 | ||
af6da548 LP |
2407 | if (timeout != (usec_t) -1) |
2408 | ts = now(CLOCK_MONOTONIC); | |
2409 | ||
80876c20 | 2410 | if (!fail && !force) { |
af6da548 LP |
2411 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
2412 | if (notify < 0) { | |
80876c20 LP |
2413 | r = -errno; |
2414 | goto fail; | |
2415 | } | |
2416 | ||
af6da548 LP |
2417 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
2418 | if (wd < 0) { | |
80876c20 LP |
2419 | r = -errno; |
2420 | goto fail; | |
2421 | } | |
2422 | } | |
2423 | ||
2424 | for (;;) { | |
af6da548 LP |
2425 | if (notify >= 0) { |
2426 | r = flush_fd(notify); | |
2427 | if (r < 0) | |
e3d1855b | 2428 | goto fail; |
af6da548 | 2429 | } |
80876c20 LP |
2430 | |
2431 | /* We pass here O_NOCTTY only so that we can check the return | |
2432 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2433 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
2434 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
2435 | if (fd < 0) | |
6ea832a2 | 2436 | return fd; |
80876c20 | 2437 | |
32c4bef8 LP |
2438 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2439 | * if we already own the tty. */ | |
2440 | zero(sa_new); | |
2441 | sa_new.sa_handler = SIG_IGN; | |
2442 | sa_new.sa_flags = SA_RESTART; | |
2443 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2444 | ||
80876c20 | 2445 | /* First, try to get the tty */ |
32c4bef8 LP |
2446 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
2447 | r = -errno; | |
2448 | ||
2449 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
2450 | |
2451 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2452 | * returning EPERM, i.e. when very likely we already | |
2453 | * are have this controlling terminal. */ | |
32c4bef8 | 2454 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
2455 | r = 0; |
2456 | ||
32c4bef8 | 2457 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
2458 | goto fail; |
2459 | } | |
2460 | ||
2461 | if (r >= 0) | |
2462 | break; | |
2463 | ||
2464 | assert(!fail); | |
2465 | assert(!force); | |
2466 | assert(notify >= 0); | |
2467 | ||
2468 | for (;;) { | |
f601daa7 | 2469 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 2470 | ssize_t l; |
f601daa7 | 2471 | struct inotify_event *e; |
80876c20 | 2472 | |
af6da548 LP |
2473 | if (timeout != (usec_t) -1) { |
2474 | usec_t n; | |
2475 | ||
2476 | n = now(CLOCK_MONOTONIC); | |
2477 | if (ts + timeout < n) { | |
2478 | r = -ETIMEDOUT; | |
2479 | goto fail; | |
2480 | } | |
2481 | ||
2482 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
2483 | if (r < 0) | |
2484 | goto fail; | |
2485 | ||
2486 | if (r == 0) { | |
2487 | r = -ETIMEDOUT; | |
2488 | goto fail; | |
2489 | } | |
2490 | } | |
2491 | ||
2492 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
2493 | if (l < 0) { | |
80876c20 | 2494 | |
af6da548 | 2495 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
2496 | continue; |
2497 | ||
2498 | r = -errno; | |
2499 | goto fail; | |
2500 | } | |
2501 | ||
2502 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2503 | |
f601daa7 LP |
2504 | while (l > 0) { |
2505 | size_t step; | |
80876c20 | 2506 | |
f601daa7 | 2507 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2508 | r = -EIO; |
f601daa7 LP |
2509 | goto fail; |
2510 | } | |
80876c20 | 2511 | |
f601daa7 LP |
2512 | step = sizeof(struct inotify_event) + e->len; |
2513 | assert(step <= (size_t) l); | |
80876c20 | 2514 | |
f601daa7 LP |
2515 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2516 | l -= step; | |
80876c20 LP |
2517 | } |
2518 | ||
2519 | break; | |
2520 | } | |
2521 | ||
2522 | /* We close the tty fd here since if the old session | |
2523 | * ended our handle will be dead. It's important that | |
2524 | * we do this after sleeping, so that we don't enter | |
2525 | * an endless loop. */ | |
2526 | close_nointr_nofail(fd); | |
2527 | } | |
2528 | ||
2529 | if (notify >= 0) | |
a16e1123 | 2530 | close_nointr_nofail(notify); |
80876c20 | 2531 | |
512947d4 MS |
2532 | r = reset_terminal_fd(fd, true); |
2533 | if (r < 0) | |
80876c20 LP |
2534 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2535 | ||
2536 | return fd; | |
2537 | ||
2538 | fail: | |
2539 | if (fd >= 0) | |
a16e1123 | 2540 | close_nointr_nofail(fd); |
80876c20 LP |
2541 | |
2542 | if (notify >= 0) | |
a16e1123 | 2543 | close_nointr_nofail(notify); |
80876c20 LP |
2544 | |
2545 | return r; | |
2546 | } | |
2547 | ||
2548 | int release_terminal(void) { | |
2549 | int r = 0, fd; | |
57cd2192 | 2550 | struct sigaction sa_old, sa_new; |
80876c20 | 2551 | |
ccaa6149 | 2552 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0) |
80876c20 LP |
2553 | return -errno; |
2554 | ||
57cd2192 LP |
2555 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2556 | * by our own TIOCNOTTY */ | |
2557 | ||
2558 | zero(sa_new); | |
2559 | sa_new.sa_handler = SIG_IGN; | |
2560 | sa_new.sa_flags = SA_RESTART; | |
2561 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2562 | ||
80876c20 LP |
2563 | if (ioctl(fd, TIOCNOTTY) < 0) |
2564 | r = -errno; | |
2565 | ||
57cd2192 LP |
2566 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2567 | ||
80876c20 LP |
2568 | close_nointr_nofail(fd); |
2569 | return r; | |
2570 | } | |
2571 | ||
9a34ec5f LP |
2572 | int sigaction_many(const struct sigaction *sa, ...) { |
2573 | va_list ap; | |
2574 | int r = 0, sig; | |
2575 | ||
2576 | va_start(ap, sa); | |
2577 | while ((sig = va_arg(ap, int)) > 0) | |
2578 | if (sigaction(sig, sa, NULL) < 0) | |
2579 | r = -errno; | |
2580 | va_end(ap); | |
2581 | ||
2582 | return r; | |
2583 | } | |
2584 | ||
2585 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2586 | struct sigaction sa; |
9a34ec5f LP |
2587 | va_list ap; |
2588 | int r = 0; | |
a337c6fc LP |
2589 | |
2590 | zero(sa); | |
2591 | sa.sa_handler = SIG_IGN; | |
2592 | sa.sa_flags = SA_RESTART; | |
2593 | ||
9a34ec5f LP |
2594 | if (sigaction(sig, &sa, NULL) < 0) |
2595 | r = -errno; | |
2596 | ||
2597 | va_start(ap, sig); | |
2598 | while ((sig = va_arg(ap, int)) > 0) | |
2599 | if (sigaction(sig, &sa, NULL) < 0) | |
2600 | r = -errno; | |
2601 | va_end(ap); | |
2602 | ||
2603 | return r; | |
2604 | } | |
2605 | ||
2606 | int default_signals(int sig, ...) { | |
2607 | struct sigaction sa; | |
2608 | va_list ap; | |
2609 | int r = 0; | |
2610 | ||
2611 | zero(sa); | |
2612 | sa.sa_handler = SIG_DFL; | |
2613 | sa.sa_flags = SA_RESTART; | |
2614 | ||
2615 | if (sigaction(sig, &sa, NULL) < 0) | |
2616 | r = -errno; | |
2617 | ||
2618 | va_start(ap, sig); | |
2619 | while ((sig = va_arg(ap, int)) > 0) | |
2620 | if (sigaction(sig, &sa, NULL) < 0) | |
2621 | r = -errno; | |
2622 | va_end(ap); | |
2623 | ||
2624 | return r; | |
a337c6fc LP |
2625 | } |
2626 | ||
8d567588 LP |
2627 | int close_pipe(int p[]) { |
2628 | int a = 0, b = 0; | |
2629 | ||
2630 | assert(p); | |
2631 | ||
2632 | if (p[0] >= 0) { | |
2633 | a = close_nointr(p[0]); | |
2634 | p[0] = -1; | |
2635 | } | |
2636 | ||
2637 | if (p[1] >= 0) { | |
2638 | b = close_nointr(p[1]); | |
2639 | p[1] = -1; | |
2640 | } | |
2641 | ||
2642 | return a < 0 ? a : b; | |
2643 | } | |
2644 | ||
eb22ac37 | 2645 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2646 | uint8_t *p; |
2647 | ssize_t n = 0; | |
2648 | ||
2649 | assert(fd >= 0); | |
2650 | assert(buf); | |
2651 | ||
2652 | p = buf; | |
2653 | ||
2654 | while (nbytes > 0) { | |
2655 | ssize_t k; | |
2656 | ||
2657 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2658 | ||
eb22ac37 | 2659 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2660 | continue; |
2661 | ||
eb22ac37 | 2662 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2663 | struct pollfd pollfd; |
2664 | ||
2665 | zero(pollfd); | |
2666 | pollfd.fd = fd; | |
2667 | pollfd.events = POLLIN; | |
2668 | ||
2669 | if (poll(&pollfd, 1, -1) < 0) { | |
2670 | if (errno == EINTR) | |
2671 | continue; | |
2672 | ||
2673 | return n > 0 ? n : -errno; | |
2674 | } | |
2675 | ||
2676 | if (pollfd.revents != POLLIN) | |
2677 | return n > 0 ? n : -EIO; | |
2678 | ||
2679 | continue; | |
2680 | } | |
2681 | ||
2682 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2683 | } | |
2684 | ||
2685 | p += k; | |
2686 | nbytes -= k; | |
2687 | n += k; | |
2688 | } | |
2689 | ||
2690 | return n; | |
2691 | } | |
2692 | ||
eb22ac37 LP |
2693 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2694 | const uint8_t *p; | |
2695 | ssize_t n = 0; | |
2696 | ||
2697 | assert(fd >= 0); | |
2698 | assert(buf); | |
2699 | ||
2700 | p = buf; | |
2701 | ||
2702 | while (nbytes > 0) { | |
2703 | ssize_t k; | |
2704 | ||
fe652127 LP |
2705 | k = write(fd, p, nbytes); |
2706 | if (k <= 0) { | |
eb22ac37 LP |
2707 | |
2708 | if (k < 0 && errno == EINTR) | |
2709 | continue; | |
2710 | ||
2711 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2712 | struct pollfd pollfd; | |
2713 | ||
2714 | zero(pollfd); | |
2715 | pollfd.fd = fd; | |
2716 | pollfd.events = POLLOUT; | |
2717 | ||
2718 | if (poll(&pollfd, 1, -1) < 0) { | |
2719 | if (errno == EINTR) | |
2720 | continue; | |
2721 | ||
2722 | return n > 0 ? n : -errno; | |
2723 | } | |
2724 | ||
2725 | if (pollfd.revents != POLLOUT) | |
2726 | return n > 0 ? n : -EIO; | |
2727 | ||
2728 | continue; | |
2729 | } | |
2730 | ||
2731 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2732 | } | |
2733 | ||
2734 | p += k; | |
2735 | nbytes -= k; | |
2736 | n += k; | |
2737 | } | |
2738 | ||
2739 | return n; | |
2740 | } | |
2741 | ||
24a6e4a4 LP |
2742 | int parse_usec(const char *t, usec_t *usec) { |
2743 | static const struct { | |
2744 | const char *suffix; | |
2745 | usec_t usec; | |
2746 | } table[] = { | |
2747 | { "sec", USEC_PER_SEC }, | |
2748 | { "s", USEC_PER_SEC }, | |
2749 | { "min", USEC_PER_MINUTE }, | |
2750 | { "hr", USEC_PER_HOUR }, | |
2751 | { "h", USEC_PER_HOUR }, | |
2752 | { "d", USEC_PER_DAY }, | |
2753 | { "w", USEC_PER_WEEK }, | |
2754 | { "msec", USEC_PER_MSEC }, | |
2755 | { "ms", USEC_PER_MSEC }, | |
2756 | { "m", USEC_PER_MINUTE }, | |
2757 | { "usec", 1ULL }, | |
2758 | { "us", 1ULL }, | |
d88a251b | 2759 | { "", USEC_PER_SEC }, /* default is sec */ |
24a6e4a4 LP |
2760 | }; |
2761 | ||
2762 | const char *p; | |
2763 | usec_t r = 0; | |
2764 | ||
2765 | assert(t); | |
2766 | assert(usec); | |
2767 | ||
2768 | p = t; | |
2769 | do { | |
2770 | long long l; | |
2771 | char *e; | |
2772 | unsigned i; | |
2773 | ||
2774 | errno = 0; | |
2775 | l = strtoll(p, &e, 10); | |
2776 | ||
2777 | if (errno != 0) | |
2778 | return -errno; | |
2779 | ||
2780 | if (l < 0) | |
2781 | return -ERANGE; | |
2782 | ||
2783 | if (e == p) | |
2784 | return -EINVAL; | |
2785 | ||
2786 | e += strspn(e, WHITESPACE); | |
2787 | ||
2788 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2789 | if (startswith(e, table[i].suffix)) { | |
2790 | r += (usec_t) l * table[i].usec; | |
2791 | p = e + strlen(table[i].suffix); | |
2792 | break; | |
2793 | } | |
2794 | ||
2795 | if (i >= ELEMENTSOF(table)) | |
2796 | return -EINVAL; | |
2797 | ||
2798 | } while (*p != 0); | |
2799 | ||
2800 | *usec = r; | |
2801 | ||
2802 | return 0; | |
2803 | } | |
2804 | ||
d88a251b LP |
2805 | int parse_nsec(const char *t, nsec_t *nsec) { |
2806 | static const struct { | |
2807 | const char *suffix; | |
2808 | nsec_t nsec; | |
2809 | } table[] = { | |
2810 | { "sec", NSEC_PER_SEC }, | |
2811 | { "s", NSEC_PER_SEC }, | |
2812 | { "min", NSEC_PER_MINUTE }, | |
2813 | { "hr", NSEC_PER_HOUR }, | |
2814 | { "h", NSEC_PER_HOUR }, | |
2815 | { "d", NSEC_PER_DAY }, | |
2816 | { "w", NSEC_PER_WEEK }, | |
2817 | { "msec", NSEC_PER_MSEC }, | |
2818 | { "ms", NSEC_PER_MSEC }, | |
2819 | { "m", NSEC_PER_MINUTE }, | |
2820 | { "usec", NSEC_PER_USEC }, | |
2821 | { "us", NSEC_PER_USEC }, | |
2822 | { "nsec", 1ULL }, | |
2823 | { "ns", 1ULL }, | |
2824 | { "", 1ULL }, /* default is nsec */ | |
2825 | }; | |
2826 | ||
2827 | const char *p; | |
2828 | nsec_t r = 0; | |
2829 | ||
2830 | assert(t); | |
2831 | assert(nsec); | |
2832 | ||
2833 | p = t; | |
2834 | do { | |
2835 | long long l; | |
2836 | char *e; | |
2837 | unsigned i; | |
2838 | ||
2839 | errno = 0; | |
2840 | l = strtoll(p, &e, 10); | |
2841 | ||
2842 | if (errno != 0) | |
2843 | return -errno; | |
2844 | ||
2845 | if (l < 0) | |
2846 | return -ERANGE; | |
2847 | ||
2848 | if (e == p) | |
2849 | return -EINVAL; | |
2850 | ||
2851 | e += strspn(e, WHITESPACE); | |
2852 | ||
2853 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2854 | if (startswith(e, table[i].suffix)) { | |
2855 | r += (nsec_t) l * table[i].nsec; | |
2856 | p = e + strlen(table[i].suffix); | |
2857 | break; | |
2858 | } | |
2859 | ||
2860 | if (i >= ELEMENTSOF(table)) | |
2861 | return -EINVAL; | |
2862 | ||
2863 | } while (*p != 0); | |
2864 | ||
2865 | *nsec = r; | |
2866 | ||
2867 | return 0; | |
2868 | } | |
2869 | ||
ab1f0633 LP |
2870 | int parse_bytes(const char *t, off_t *bytes) { |
2871 | static const struct { | |
2872 | const char *suffix; | |
2873 | off_t factor; | |
2874 | } table[] = { | |
2875 | { "B", 1 }, | |
2876 | { "K", 1024ULL }, | |
2877 | { "M", 1024ULL*1024ULL }, | |
2878 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2879 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2880 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2881 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2882 | { "", 1 }, |
2883 | }; | |
2884 | ||
2885 | const char *p; | |
2886 | off_t r = 0; | |
2887 | ||
2888 | assert(t); | |
2889 | assert(bytes); | |
2890 | ||
2891 | p = t; | |
2892 | do { | |
2893 | long long l; | |
2894 | char *e; | |
2895 | unsigned i; | |
2896 | ||
2897 | errno = 0; | |
2898 | l = strtoll(p, &e, 10); | |
2899 | ||
2900 | if (errno != 0) | |
2901 | return -errno; | |
2902 | ||
2903 | if (l < 0) | |
2904 | return -ERANGE; | |
2905 | ||
2906 | if (e == p) | |
2907 | return -EINVAL; | |
2908 | ||
2909 | e += strspn(e, WHITESPACE); | |
2910 | ||
2911 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2912 | if (startswith(e, table[i].suffix)) { | |
2913 | r += (off_t) l * table[i].factor; | |
2914 | p = e + strlen(table[i].suffix); | |
2915 | break; | |
2916 | } | |
2917 | ||
2918 | if (i >= ELEMENTSOF(table)) | |
2919 | return -EINVAL; | |
2920 | ||
2921 | } while (*p != 0); | |
2922 | ||
2923 | *bytes = r; | |
2924 | ||
2925 | return 0; | |
2926 | } | |
2927 | ||
843d2643 LP |
2928 | int make_stdio(int fd) { |
2929 | int r, s, t; | |
2930 | ||
2931 | assert(fd >= 0); | |
2932 | ||
2933 | r = dup2(fd, STDIN_FILENO); | |
2934 | s = dup2(fd, STDOUT_FILENO); | |
2935 | t = dup2(fd, STDERR_FILENO); | |
2936 | ||
2937 | if (fd >= 3) | |
2938 | close_nointr_nofail(fd); | |
2939 | ||
2940 | if (r < 0 || s < 0 || t < 0) | |
2941 | return -errno; | |
2942 | ||
7862f62d LP |
2943 | fd_cloexec(STDIN_FILENO, false); |
2944 | fd_cloexec(STDOUT_FILENO, false); | |
2945 | fd_cloexec(STDERR_FILENO, false); | |
2946 | ||
843d2643 LP |
2947 | return 0; |
2948 | } | |
2949 | ||
ade509ce LP |
2950 | int make_null_stdio(void) { |
2951 | int null_fd; | |
2952 | ||
cd3bd60a LP |
2953 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2954 | if (null_fd < 0) | |
ade509ce LP |
2955 | return -errno; |
2956 | ||
2957 | return make_stdio(null_fd); | |
2958 | } | |
2959 | ||
8407a5d0 LP |
2960 | bool is_device_path(const char *path) { |
2961 | ||
2962 | /* Returns true on paths that refer to a device, either in | |
2963 | * sysfs or in /dev */ | |
2964 | ||
2965 | return | |
2966 | path_startswith(path, "/dev/") || | |
2967 | path_startswith(path, "/sys/"); | |
2968 | } | |
2969 | ||
01f78473 LP |
2970 | int dir_is_empty(const char *path) { |
2971 | DIR *d; | |
2972 | int r; | |
2973 | struct dirent buf, *de; | |
2974 | ||
2975 | if (!(d = opendir(path))) | |
2976 | return -errno; | |
2977 | ||
2978 | for (;;) { | |
2979 | if ((r = readdir_r(d, &buf, &de)) > 0) { | |
2980 | r = -r; | |
2981 | break; | |
2982 | } | |
2983 | ||
2984 | if (!de) { | |
2985 | r = 1; | |
2986 | break; | |
2987 | } | |
2988 | ||
2989 | if (!ignore_file(de->d_name)) { | |
2990 | r = 0; | |
2991 | break; | |
2992 | } | |
2993 | } | |
2994 | ||
2995 | closedir(d); | |
2996 | return r; | |
2997 | } | |
2998 | ||
d3782d60 LP |
2999 | unsigned long long random_ull(void) { |
3000 | int fd; | |
3001 | uint64_t ull; | |
3002 | ssize_t r; | |
3003 | ||
3004 | if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0) | |
3005 | goto fallback; | |
3006 | ||
eb22ac37 | 3007 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
3008 | close_nointr_nofail(fd); |
3009 | ||
3010 | if (r != sizeof(ull)) | |
3011 | goto fallback; | |
3012 | ||
3013 | return ull; | |
3014 | ||
3015 | fallback: | |
3016 | return random() * RAND_MAX + random(); | |
3017 | } | |
3018 | ||
5b6319dc LP |
3019 | void rename_process(const char name[8]) { |
3020 | assert(name); | |
3021 | ||
5d6b1584 LP |
3022 | /* This is a like a poor man's setproctitle(). It changes the |
3023 | * comm field, argv[0], and also the glibc's internally used | |
3024 | * name of the process. For the first one a limit of 16 chars | |
3025 | * applies, to the second one usually one of 10 (i.e. length | |
3026 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
3027 | * "systemd"). If you pass a longer string it will be | |
3028 | * truncated */ | |
5b6319dc | 3029 | |
5d6b1584 | 3030 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
3031 | |
3032 | if (program_invocation_name) | |
3033 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
3034 | |
3035 | if (saved_argc > 0) { | |
3036 | int i; | |
3037 | ||
3038 | if (saved_argv[0]) | |
3039 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
3040 | ||
3041 | for (i = 1; i < saved_argc; i++) { | |
3042 | if (!saved_argv[i]) | |
3043 | break; | |
3044 | ||
3045 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
3046 | } | |
3047 | } | |
5b6319dc LP |
3048 | } |
3049 | ||
7d793605 LP |
3050 | void sigset_add_many(sigset_t *ss, ...) { |
3051 | va_list ap; | |
3052 | int sig; | |
3053 | ||
3054 | assert(ss); | |
3055 | ||
3056 | va_start(ap, ss); | |
3057 | while ((sig = va_arg(ap, int)) > 0) | |
3058 | assert_se(sigaddset(ss, sig) == 0); | |
3059 | va_end(ap); | |
3060 | } | |
3061 | ||
ef2f1067 LP |
3062 | char* gethostname_malloc(void) { |
3063 | struct utsname u; | |
3064 | ||
3065 | assert_se(uname(&u) >= 0); | |
3066 | ||
344de609 | 3067 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
3068 | return strdup(u.nodename); |
3069 | ||
3070 | return strdup(u.sysname); | |
3071 | } | |
3072 | ||
344de609 LP |
3073 | bool hostname_is_set(void) { |
3074 | struct utsname u; | |
3075 | ||
3076 | assert_se(uname(&u) >= 0); | |
3077 | ||
3078 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
3079 | } | |
3080 | ||
7c5f152a LP |
3081 | |
3082 | static char *lookup_uid(uid_t uid) { | |
ef2f1067 LP |
3083 | long bufsize; |
3084 | char *buf, *name; | |
3085 | struct passwd pwbuf, *pw = NULL; | |
ef2f1067 LP |
3086 | |
3087 | /* Shortcut things to avoid NSS lookups */ | |
3088 | if (uid == 0) | |
3089 | return strdup("root"); | |
3090 | ||
7c5f152a LP |
3091 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
3092 | if (bufsize <= 0) | |
ef2f1067 LP |
3093 | bufsize = 4096; |
3094 | ||
7c5f152a LP |
3095 | buf = malloc(bufsize); |
3096 | if (!buf) | |
ef2f1067 LP |
3097 | return NULL; |
3098 | ||
3099 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) { | |
3100 | name = strdup(pw->pw_name); | |
3101 | free(buf); | |
3102 | return name; | |
3103 | } | |
3104 | ||
3105 | free(buf); | |
3106 | ||
3107 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
3108 | return NULL; | |
3109 | ||
3110 | return name; | |
3111 | } | |
3112 | ||
7c5f152a LP |
3113 | char* getlogname_malloc(void) { |
3114 | uid_t uid; | |
3115 | struct stat st; | |
3116 | ||
3117 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
3118 | uid = st.st_uid; | |
3119 | else | |
3120 | uid = getuid(); | |
3121 | ||
3122 | return lookup_uid(uid); | |
3123 | } | |
3124 | ||
3125 | char *getusername_malloc(void) { | |
3126 | const char *e; | |
3127 | ||
3128 | e = getenv("USER"); | |
3129 | if (e) | |
3130 | return strdup(e); | |
3131 | ||
3132 | return lookup_uid(getuid()); | |
3133 | } | |
3134 | ||
fc116c6a LP |
3135 | int getttyname_malloc(int fd, char **r) { |
3136 | char path[PATH_MAX], *c; | |
618e02c7 | 3137 | int k; |
8c6db833 LP |
3138 | |
3139 | assert(r); | |
ef2f1067 | 3140 | |
fc116c6a | 3141 | if ((k = ttyname_r(fd, path, sizeof(path))) != 0) |
618e02c7 | 3142 | return -k; |
ef2f1067 LP |
3143 | |
3144 | char_array_0(path); | |
3145 | ||
fc116c6a | 3146 | if (!(c = strdup(startswith(path, "/dev/") ? path + 5 : path))) |
8c6db833 LP |
3147 | return -ENOMEM; |
3148 | ||
3149 | *r = c; | |
3150 | return 0; | |
3151 | } | |
3152 | ||
fc116c6a LP |
3153 | int getttyname_harder(int fd, char **r) { |
3154 | int k; | |
3155 | char *s; | |
3156 | ||
3157 | if ((k = getttyname_malloc(fd, &s)) < 0) | |
3158 | return k; | |
3159 | ||
3160 | if (streq(s, "tty")) { | |
3161 | free(s); | |
4d6d6518 | 3162 | return get_ctty(0, NULL, r); |
fc116c6a LP |
3163 | } |
3164 | ||
3165 | *r = s; | |
3166 | return 0; | |
3167 | } | |
3168 | ||
4d6d6518 | 3169 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
fc116c6a | 3170 | int k; |
4d6d6518 | 3171 | char line[LINE_MAX], *p, *fn; |
fc116c6a LP |
3172 | unsigned long ttynr; |
3173 | FILE *f; | |
3174 | ||
4d6d6518 LP |
3175 | if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0) |
3176 | return -ENOMEM; | |
3177 | ||
3178 | f = fopen(fn, "re"); | |
3179 | free(fn); | |
3180 | if (!f) | |
fc116c6a LP |
3181 | return -errno; |
3182 | ||
4d6d6518 | 3183 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 3184 | k = feof(f) ? -EIO : -errno; |
fc116c6a LP |
3185 | fclose(f); |
3186 | return k; | |
3187 | } | |
3188 | ||
3189 | fclose(f); | |
3190 | ||
4d6d6518 LP |
3191 | p = strrchr(line, ')'); |
3192 | if (!p) | |
fc116c6a LP |
3193 | return -EIO; |
3194 | ||
3195 | p++; | |
3196 | ||
3197 | if (sscanf(p, " " | |
3198 | "%*c " /* state */ | |
3199 | "%*d " /* ppid */ | |
3200 | "%*d " /* pgrp */ | |
3201 | "%*d " /* session */ | |
3202 | "%lu ", /* ttynr */ | |
3203 | &ttynr) != 1) | |
3204 | return -EIO; | |
3205 | ||
3206 | *d = (dev_t) ttynr; | |
3207 | return 0; | |
3208 | } | |
3209 | ||
4d6d6518 | 3210 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 3211 | int k; |
20c03b7b | 3212 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
3213 | dev_t devnr; |
3214 | ||
3215 | assert(r); | |
3216 | ||
4d6d6518 LP |
3217 | k = get_ctty_devnr(pid, &devnr); |
3218 | if (k < 0) | |
fc116c6a LP |
3219 | return k; |
3220 | ||
3221 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
3222 | char_array_0(fn); | |
3223 | ||
3224 | if ((k = readlink_malloc(fn, &s)) < 0) { | |
3225 | ||
3226 | if (k != -ENOENT) | |
3227 | return k; | |
3228 | ||
46824d0e LP |
3229 | /* This is an ugly hack */ |
3230 | if (major(devnr) == 136) { | |
3231 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
3232 | return -ENOMEM; | |
3233 | ||
3234 | *r = b; | |
3235 | if (_devnr) | |
3236 | *_devnr = devnr; | |
3237 | ||
3238 | return 0; | |
3239 | } | |
3240 | ||
fc116c6a LP |
3241 | /* Probably something like the ptys which have no |
3242 | * symlink in /dev/char. Let's return something | |
3243 | * vaguely useful. */ | |
3244 | ||
3245 | if (!(b = strdup(fn + 5))) | |
3246 | return -ENOMEM; | |
3247 | ||
3248 | *r = b; | |
46824d0e LP |
3249 | if (_devnr) |
3250 | *_devnr = devnr; | |
3251 | ||
fc116c6a LP |
3252 | return 0; |
3253 | } | |
3254 | ||
3255 | if (startswith(s, "/dev/")) | |
3256 | p = s + 5; | |
3257 | else if (startswith(s, "../")) | |
3258 | p = s + 3; | |
3259 | else | |
3260 | p = s; | |
3261 | ||
3262 | b = strdup(p); | |
3263 | free(s); | |
3264 | ||
3265 | if (!b) | |
3266 | return -ENOMEM; | |
3267 | ||
3268 | *r = b; | |
46824d0e LP |
3269 | if (_devnr) |
3270 | *_devnr = devnr; | |
3271 | ||
fc116c6a LP |
3272 | return 0; |
3273 | } | |
3274 | ||
f56d5db9 | 3275 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
3276 | DIR *d; |
3277 | int ret = 0; | |
3278 | ||
3279 | assert(fd >= 0); | |
3280 | ||
3281 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 3282 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 3283 | |
d4d046e3 LP |
3284 | d = fdopendir(fd); |
3285 | if (!d) { | |
8c6db833 | 3286 | close_nointr_nofail(fd); |
4c633005 LP |
3287 | |
3288 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
3289 | } |
3290 | ||
3291 | for (;;) { | |
3292 | struct dirent buf, *de; | |
7925c22a LP |
3293 | bool is_dir, keep_around; |
3294 | struct stat st; | |
8c6db833 LP |
3295 | int r; |
3296 | ||
d4d046e3 LP |
3297 | r = readdir_r(d, &buf, &de); |
3298 | if (r != 0 && ret == 0) { | |
3299 | ret = -r; | |
8c6db833 LP |
3300 | break; |
3301 | } | |
3302 | ||
3303 | if (!de) | |
3304 | break; | |
3305 | ||
3306 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
3307 | continue; | |
3308 | ||
7925c22a LP |
3309 | if (de->d_type == DT_UNKNOWN || |
3310 | honour_sticky || | |
3311 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 3312 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 3313 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3314 | ret = -errno; |
3315 | continue; | |
3316 | } | |
3317 | ||
3318 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
3319 | keep_around = |
3320 | honour_sticky && | |
3321 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
3322 | (st.st_mode & S_ISVTX); | |
ad293f5a | 3323 | } else { |
8c6db833 | 3324 | is_dir = de->d_type == DT_DIR; |
7925c22a | 3325 | keep_around = false; |
ad293f5a | 3326 | } |
8c6db833 LP |
3327 | |
3328 | if (is_dir) { | |
3329 | int subdir_fd; | |
8c6db833 | 3330 | |
597f43c7 | 3331 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
3332 | if (root_dev && st.st_dev != root_dev->st_dev) |
3333 | continue; | |
8c6db833 | 3334 | |
7925c22a LP |
3335 | subdir_fd = openat(fd, de->d_name, |
3336 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
3337 | if (subdir_fd < 0) { | |
3338 | if (ret == 0 && errno != ENOENT) | |
3339 | ret = -errno; | |
3340 | continue; | |
3341 | } | |
3342 | ||
3343 | r = rm_rf_children(subdir_fd, only_dirs, honour_sticky, root_dev); | |
3344 | if (r < 0 && ret == 0) | |
3345 | ret = r; | |
3346 | ||
3347 | if (!keep_around) | |
3348 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
3349 | if (ret == 0 && errno != ENOENT) |
3350 | ret = -errno; | |
3351 | } | |
3352 | ||
3353 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
3354 | |
3355 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3356 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3357 | ret = -errno; |
3358 | } | |
3359 | } | |
3360 | } | |
3361 | ||
3362 | closedir(d); | |
3363 | ||
3364 | return ret; | |
3365 | } | |
3366 | ||
f56d5db9 LP |
3367 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
3368 | struct statfs s; | |
3369 | ||
3370 | assert(fd >= 0); | |
3371 | ||
3372 | if (fstatfs(fd, &s) < 0) { | |
3373 | close_nointr_nofail(fd); | |
3374 | return -errno; | |
3375 | } | |
3376 | ||
3377 | /* We refuse to clean disk file systems with this call. This | |
3378 | * is extra paranoia just to be sure we never ever remove | |
3379 | * non-state data */ | |
3380 | ||
3381 | if (s.f_type != TMPFS_MAGIC && | |
3382 | s.f_type != RAMFS_MAGIC) { | |
3383 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3384 | close_nointr_nofail(fd); | |
3385 | return -EPERM; | |
3386 | } | |
3387 | ||
3388 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
3389 | } | |
3390 | ||
3391 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
3392 | int fd, r; | |
3393 | struct statfs s; | |
8c6db833 LP |
3394 | |
3395 | assert(path); | |
3396 | ||
f56d5db9 LP |
3397 | /* We refuse to clean the root file system with this |
3398 | * call. This is extra paranoia to never cause a really | |
3399 | * seriously broken system. */ | |
3400 | if (path_equal(path, "/")) { | |
3401 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
3402 | return -EPERM; | |
3403 | } | |
461b1822 | 3404 | |
d4d046e3 LP |
3405 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
3406 | if (fd < 0) { | |
8c6db833 LP |
3407 | |
3408 | if (errno != ENOTDIR) | |
3409 | return -errno; | |
3410 | ||
f56d5db9 LP |
3411 | if (!dangerous) { |
3412 | if (statfs(path, &s) < 0) | |
3413 | return -errno; | |
3414 | ||
3415 | if (s.f_type != TMPFS_MAGIC && | |
3416 | s.f_type != RAMFS_MAGIC) { | |
3417 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3418 | return -EPERM; | |
3419 | } | |
3420 | } | |
3421 | ||
8c6db833 | 3422 | if (delete_root && !only_dirs) |
d4d046e3 | 3423 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
3424 | return -errno; |
3425 | ||
3426 | return 0; | |
3427 | } | |
3428 | ||
f56d5db9 LP |
3429 | if (!dangerous) { |
3430 | if (fstatfs(fd, &s) < 0) { | |
3431 | close_nointr_nofail(fd); | |
3432 | return -errno; | |
3433 | } | |
ad293f5a | 3434 | |
f56d5db9 LP |
3435 | if (s.f_type != TMPFS_MAGIC && |
3436 | s.f_type != RAMFS_MAGIC) { | |
3437 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3438 | close_nointr_nofail(fd); | |
3439 | return -EPERM; | |
3440 | } | |
3441 | } | |
3442 | ||
3443 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
3444 | if (delete_root) { |
3445 | ||
8d53b453 | 3446 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 3447 | return r; |
8c6db833 | 3448 | |
e27796a0 | 3449 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
3450 | if (r == 0) |
3451 | r = -errno; | |
3452 | } | |
ad293f5a | 3453 | } |
8c6db833 LP |
3454 | |
3455 | return r; | |
3456 | } | |
3457 | ||
f56d5db9 LP |
3458 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
3459 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
3460 | } | |
3461 | ||
3462 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
3463 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
3464 | } | |
3465 | ||
8c6db833 LP |
3466 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
3467 | assert(path); | |
3468 | ||
3469 | /* Under the assumption that we are running privileged we | |
3470 | * first change the access mode and only then hand out | |
3471 | * ownership to avoid a window where access is too open. */ | |
3472 | ||
8d53b453 LP |
3473 | if (mode != (mode_t) -1) |
3474 | if (chmod(path, mode) < 0) | |
3475 | return -errno; | |
8c6db833 | 3476 | |
8d53b453 LP |
3477 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
3478 | if (chown(path, uid, gid) < 0) | |
3479 | return -errno; | |
8c6db833 LP |
3480 | |
3481 | return 0; | |
ef2f1067 LP |
3482 | } |
3483 | ||
f4b47811 LP |
3484 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
3485 | assert(fd >= 0); | |
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 | ||
3491 | if (fchmod(fd, mode) < 0) | |
3492 | return -errno; | |
3493 | ||
3494 | if (fchown(fd, uid, gid) < 0) | |
3495 | return -errno; | |
3496 | ||
3497 | return 0; | |
3498 | } | |
3499 | ||
82c121a4 LP |
3500 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3501 | cpu_set_t *r; | |
3502 | unsigned n = 1024; | |
3503 | ||
3504 | /* Allocates the cpuset in the right size */ | |
3505 | ||
3506 | for (;;) { | |
3507 | if (!(r = CPU_ALLOC(n))) | |
3508 | return NULL; | |
3509 | ||
3510 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3511 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3512 | ||
3513 | if (ncpus) | |
3514 | *ncpus = n; | |
3515 | ||
3516 | return r; | |
3517 | } | |
3518 | ||
3519 | CPU_FREE(r); | |
3520 | ||
3521 | if (errno != EINVAL) | |
3522 | return NULL; | |
3523 | ||
3524 | n *= 2; | |
3525 | } | |
3526 | } | |
3527 | ||
67e5cc4f | 3528 | void status_vprintf(const char *status, bool ellipse, const char *format, va_list ap) { |
9ab7a8d2 MS |
3529 | char *s = NULL; |
3530 | static const char status_indent[] = " "; /* "[" STATUS "] " */ | |
3531 | int fd = -1; | |
81beb750 LP |
3532 | struct iovec iovec[5]; |
3533 | int n = 0; | |
9e58ff9c LP |
3534 | |
3535 | assert(format); | |
3536 | ||
9ab7a8d2 | 3537 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
3538 | * optional and go exclusively to the console. */ |
3539 | ||
3540 | if (vasprintf(&s, format, ap) < 0) | |
3541 | goto finish; | |
3542 | ||
67e5cc4f | 3543 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 3544 | if (fd < 0) |
9e58ff9c LP |
3545 | goto finish; |
3546 | ||
67e5cc4f | 3547 | if (ellipse) { |
9ab7a8d2 MS |
3548 | char *e; |
3549 | size_t emax, sl; | |
3550 | int c; | |
3551 | ||
67e5cc4f LP |
3552 | c = fd_columns(fd); |
3553 | if (c <= 0) | |
3554 | c = 80; | |
81beb750 | 3555 | |
9ab7a8d2 MS |
3556 | sl = status ? strlen(status_indent) : 0; |
3557 | ||
3558 | emax = c - sl - 1; | |
3559 | if (emax < 3) | |
3560 | emax = 3; | |
81beb750 | 3561 | |
67e5cc4f LP |
3562 | e = ellipsize(s, emax, 75); |
3563 | if (e) { | |
3564 | free(s); | |
3565 | s = e; | |
3566 | } | |
81beb750 LP |
3567 | } |
3568 | ||
3569 | zero(iovec); | |
81beb750 | 3570 | |
9ab7a8d2 MS |
3571 | if (status) { |
3572 | if (!isempty(status)) { | |
3573 | IOVEC_SET_STRING(iovec[n++], "["); | |
3574 | IOVEC_SET_STRING(iovec[n++], status); | |
3575 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3576 | } else | |
3577 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3578 | } |
3579 | ||
9ab7a8d2 MS |
3580 | IOVEC_SET_STRING(iovec[n++], s); |
3581 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 LP |
3582 | |
3583 | writev(fd, iovec, n); | |
9e58ff9c LP |
3584 | |
3585 | finish: | |
3586 | free(s); | |
3587 | ||
3588 | if (fd >= 0) | |
3589 | close_nointr_nofail(fd); | |
3590 | } | |
3591 | ||
67e5cc4f | 3592 | void status_printf(const char *status, bool ellipse, const char *format, ...) { |
c846ff47 LP |
3593 | va_list ap; |
3594 | ||
3595 | assert(format); | |
3596 | ||
3597 | va_start(ap, format); | |
67e5cc4f | 3598 | status_vprintf(status, ellipse, format, ap); |
c846ff47 LP |
3599 | va_end(ap); |
3600 | } | |
3601 | ||
3602 | void status_welcome(void) { | |
10aa7034 LP |
3603 | char *pretty_name = NULL, *ansi_color = NULL; |
3604 | const char *const_pretty = NULL, *const_color = NULL; | |
3605 | int r; | |
c846ff47 | 3606 | |
10aa7034 LP |
3607 | if ((r = parse_env_file("/etc/os-release", NEWLINE, |
3608 | "PRETTY_NAME", &pretty_name, | |
3609 | "ANSI_COLOR", &ansi_color, | |
3610 | NULL)) < 0) { | |
c846ff47 | 3611 | |
10aa7034 LP |
3612 | if (r != -ENOENT) |
3613 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3614 | } | |
c846ff47 | 3615 | |
10aa7034 LP |
3616 | if (!pretty_name && !const_pretty) |
3617 | const_pretty = "Linux"; | |
3618 | ||
3619 | if (!ansi_color && !const_color) | |
3620 | const_color = "1"; | |
3621 | ||
81beb750 | 3622 | status_printf(NULL, |
67e5cc4f | 3623 | false, |
81beb750 | 3624 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", |
10aa7034 LP |
3625 | const_color ? const_color : ansi_color, |
3626 | const_pretty ? const_pretty : pretty_name); | |
86a3475b LP |
3627 | |
3628 | free(ansi_color); | |
3629 | free(pretty_name); | |
c846ff47 LP |
3630 | } |
3631 | ||
fab56fc5 LP |
3632 | char *replace_env(const char *format, char **env) { |
3633 | enum { | |
3634 | WORD, | |
c24eb49e | 3635 | CURLY, |
fab56fc5 LP |
3636 | VARIABLE |
3637 | } state = WORD; | |
3638 | ||
3639 | const char *e, *word = format; | |
3640 | char *r = NULL, *k; | |
3641 | ||
3642 | assert(format); | |
3643 | ||
3644 | for (e = format; *e; e ++) { | |
3645 | ||
3646 | switch (state) { | |
3647 | ||
3648 | case WORD: | |
3649 | if (*e == '$') | |
c24eb49e | 3650 | state = CURLY; |
fab56fc5 LP |
3651 | break; |
3652 | ||
c24eb49e LP |
3653 | case CURLY: |
3654 | if (*e == '{') { | |
fab56fc5 LP |
3655 | if (!(k = strnappend(r, word, e-word-1))) |
3656 | goto fail; | |
3657 | ||
3658 | free(r); | |
3659 | r = k; | |
3660 | ||
3661 | word = e-1; | |
3662 | state = VARIABLE; | |
3663 | ||
3664 | } else if (*e == '$') { | |
3665 | if (!(k = strnappend(r, word, e-word))) | |
3666 | goto fail; | |
3667 | ||
3668 | free(r); | |
3669 | r = k; | |
3670 | ||
3671 | word = e+1; | |
3672 | state = WORD; | |
3673 | } else | |
3674 | state = WORD; | |
3675 | break; | |
3676 | ||
3677 | case VARIABLE: | |
c24eb49e | 3678 | if (*e == '}') { |
b95cf362 | 3679 | const char *t; |
fab56fc5 | 3680 | |
b95cf362 LP |
3681 | if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) |
3682 | t = ""; | |
fab56fc5 | 3683 | |
b95cf362 LP |
3684 | if (!(k = strappend(r, t))) |
3685 | goto fail; | |
fab56fc5 | 3686 | |
b95cf362 LP |
3687 | free(r); |
3688 | r = k; | |
fab56fc5 | 3689 | |
b95cf362 | 3690 | word = e+1; |
fab56fc5 LP |
3691 | state = WORD; |
3692 | } | |
3693 | break; | |
3694 | } | |
3695 | } | |
3696 | ||
3697 | if (!(k = strnappend(r, word, e-word))) | |
3698 | goto fail; | |
3699 | ||
3700 | free(r); | |
3701 | return k; | |
3702 | ||
3703 | fail: | |
3704 | free(r); | |
3705 | return NULL; | |
3706 | } | |
3707 | ||
3708 | char **replace_env_argv(char **argv, char **env) { | |
3709 | char **r, **i; | |
c24eb49e LP |
3710 | unsigned k = 0, l = 0; |
3711 | ||
3712 | l = strv_length(argv); | |
fab56fc5 | 3713 | |
c24eb49e | 3714 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3715 | return NULL; |
3716 | ||
3717 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3718 | |
3719 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3720 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3721 | char *e; | |
3722 | char **w, **m; | |
3723 | unsigned q; | |
c24eb49e | 3724 | |
b95cf362 | 3725 | if ((e = strv_env_get(env, *i+1))) { |
c24eb49e LP |
3726 | |
3727 | if (!(m = strv_split_quoted(e))) { | |
3728 | r[k] = NULL; | |
3729 | strv_free(r); | |
3730 | return NULL; | |
3731 | } | |
b95cf362 LP |
3732 | } else |
3733 | m = NULL; | |
c24eb49e | 3734 | |
b95cf362 LP |
3735 | q = strv_length(m); |
3736 | l = l + q - 1; | |
c24eb49e | 3737 | |
b95cf362 LP |
3738 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3739 | r[k] = NULL; | |
3740 | strv_free(r); | |
3741 | strv_free(m); | |
3742 | return NULL; | |
3743 | } | |
c24eb49e | 3744 | |
b95cf362 LP |
3745 | r = w; |
3746 | if (m) { | |
c24eb49e LP |
3747 | memcpy(r + k, m, q * sizeof(char*)); |
3748 | free(m); | |
c24eb49e | 3749 | } |
b95cf362 LP |
3750 | |
3751 | k += q; | |
3752 | continue; | |
c24eb49e LP |
3753 | } |
3754 | ||
3755 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3756 | if (!(r[k++] = replace_env(*i, env))) { |
3757 | strv_free(r); | |
3758 | return NULL; | |
3759 | } | |
3760 | } | |
3761 | ||
3762 | r[k] = NULL; | |
3763 | return r; | |
3764 | } | |
3765 | ||
81beb750 LP |
3766 | int fd_columns(int fd) { |
3767 | struct winsize ws; | |
3768 | zero(ws); | |
3769 | ||
3770 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3771 | return -errno; | |
3772 | ||
3773 | if (ws.ws_col <= 0) | |
3774 | return -EIO; | |
3775 | ||
3776 | return ws.ws_col; | |
3777 | } | |
3778 | ||
72f59706 | 3779 | unsigned columns(void) { |
fa776d8e LP |
3780 | static __thread int parsed_columns = 0; |
3781 | const char *e; | |
3782 | ||
3bfc7184 | 3783 | if (_likely_(parsed_columns > 0)) |
fa776d8e LP |
3784 | return parsed_columns; |
3785 | ||
81beb750 LP |
3786 | e = getenv("COLUMNS"); |
3787 | if (e) | |
fa776d8e LP |
3788 | parsed_columns = atoi(e); |
3789 | ||
81beb750 LP |
3790 | if (parsed_columns <= 0) |
3791 | parsed_columns = fd_columns(STDOUT_FILENO); | |
fa776d8e LP |
3792 | |
3793 | if (parsed_columns <= 0) | |
3794 | parsed_columns = 80; | |
3795 | ||
3796 | return parsed_columns; | |
3797 | } | |
3798 | ||
8f2d43a0 LP |
3799 | int fd_lines(int fd) { |
3800 | struct winsize ws; | |
3801 | zero(ws); | |
3802 | ||
3803 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3804 | return -errno; | |
3805 | ||
3806 | if (ws.ws_row <= 0) | |
3807 | return -EIO; | |
3808 | ||
3809 | return ws.ws_row; | |
3810 | } | |
3811 | ||
3812 | unsigned lines(void) { | |
3813 | static __thread int parsed_lines = 0; | |
3814 | const char *e; | |
3815 | ||
3816 | if (_likely_(parsed_lines > 0)) | |
3817 | return parsed_lines; | |
3818 | ||
3819 | e = getenv("LINES"); | |
3820 | if (e) | |
3821 | parsed_lines = atoi(e); | |
3822 | ||
3823 | if (parsed_lines <= 0) | |
3824 | parsed_lines = fd_lines(STDOUT_FILENO); | |
3825 | ||
3826 | if (parsed_lines <= 0) | |
3827 | parsed_lines = 25; | |
3828 | ||
3829 | return parsed_lines; | |
3830 | } | |
3831 | ||
b4f10a5e LP |
3832 | int running_in_chroot(void) { |
3833 | struct stat a, b; | |
3834 | ||
3835 | zero(a); | |
3836 | zero(b); | |
3837 | ||
3838 | /* Only works as root */ | |
3839 | ||
3840 | if (stat("/proc/1/root", &a) < 0) | |
3841 | return -errno; | |
3842 | ||
3843 | if (stat("/", &b) < 0) | |
3844 | return -errno; | |
3845 | ||
3846 | return | |
3847 | a.st_dev != b.st_dev || | |
3848 | a.st_ino != b.st_ino; | |
3849 | } | |
3850 | ||
72f59706 LP |
3851 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3852 | size_t x; | |
8fe914ec LP |
3853 | char *r; |
3854 | ||
3855 | assert(s); | |
3856 | assert(percent <= 100); | |
72f59706 | 3857 | assert(new_length >= 3); |
8fe914ec | 3858 | |
72f59706 LP |
3859 | if (old_length <= 3 || old_length <= new_length) |
3860 | return strndup(s, old_length); | |
8fe914ec | 3861 | |
72f59706 LP |
3862 | r = new0(char, new_length+1); |
3863 | if (!r) | |
8fe914ec LP |
3864 | return r; |
3865 | ||
72f59706 | 3866 | x = (new_length * percent) / 100; |
8fe914ec | 3867 | |
72f59706 LP |
3868 | if (x > new_length - 3) |
3869 | x = new_length - 3; | |
8fe914ec LP |
3870 | |
3871 | memcpy(r, s, x); | |
3872 | r[x] = '.'; | |
3873 | r[x+1] = '.'; | |
3874 | r[x+2] = '.'; | |
3875 | memcpy(r + x + 3, | |
72f59706 LP |
3876 | s + old_length - (new_length - x - 3), |
3877 | new_length - x - 3); | |
8fe914ec LP |
3878 | |
3879 | return r; | |
3880 | } | |
3881 | ||
72f59706 LP |
3882 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3883 | return ellipsize_mem(s, strlen(s), length, percent); | |
3884 | } | |
3885 | ||
f6144808 LP |
3886 | int touch(const char *path) { |
3887 | int fd; | |
3888 | ||
3889 | assert(path); | |
3890 | ||
14f3c825 | 3891 | if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0) |
f6144808 LP |
3892 | return -errno; |
3893 | ||
3894 | close_nointr_nofail(fd); | |
3895 | return 0; | |
3896 | } | |
afea26ad | 3897 | |
97c4a07d | 3898 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3899 | size_t l; |
3900 | assert(s); | |
3901 | ||
31ed59c5 LP |
3902 | l = strlen(s); |
3903 | if (l < 2) | |
11ce3427 LP |
3904 | return strdup(s); |
3905 | ||
97c4a07d | 3906 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3907 | return strndup(s+1, l-2); |
3908 | ||
3909 | return strdup(s); | |
3910 | } | |
3911 | ||
5f7c426e LP |
3912 | char *normalize_env_assignment(const char *s) { |
3913 | char *name, *value, *p, *r; | |
3914 | ||
3915 | p = strchr(s, '='); | |
3916 | ||
3917 | if (!p) { | |
3918 | if (!(r = strdup(s))) | |
3919 | return NULL; | |
3920 | ||
3921 | return strstrip(r); | |
3922 | } | |
3923 | ||
3924 | if (!(name = strndup(s, p - s))) | |
3925 | return NULL; | |
3926 | ||
3927 | if (!(p = strdup(p+1))) { | |
3928 | free(name); | |
3929 | return NULL; | |
3930 | } | |
3931 | ||
3932 | value = unquote(strstrip(p), QUOTES); | |
3933 | free(p); | |
3934 | ||
3935 | if (!value) { | |
5f7c426e LP |
3936 | free(name); |
3937 | return NULL; | |
3938 | } | |
3939 | ||
3940 | if (asprintf(&r, "%s=%s", name, value) < 0) | |
3941 | r = NULL; | |
3942 | ||
3943 | free(value); | |
3944 | free(name); | |
3945 | ||
3946 | return r; | |
3947 | } | |
3948 | ||
8e12a6ae | 3949 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3950 | siginfo_t dummy; |
3951 | ||
2e78aa99 | 3952 | assert(pid >= 1); |
1968a360 LP |
3953 | |
3954 | if (!status) | |
3955 | status = &dummy; | |
2e78aa99 LP |
3956 | |
3957 | for (;;) { | |
8e12a6ae LP |
3958 | zero(*status); |
3959 | ||
3960 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3961 | |
3962 | if (errno == EINTR) | |
3963 | continue; | |
3964 | ||
3965 | return -errno; | |
3966 | } | |
3967 | ||
3968 | return 0; | |
3969 | } | |
3970 | } | |
3971 | ||
97c4a07d LP |
3972 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3973 | int r; | |
3974 | siginfo_t status; | |
3975 | ||
3976 | assert(name); | |
3977 | assert(pid > 1); | |
3978 | ||
3979 | if ((r = wait_for_terminate(pid, &status)) < 0) { | |
3980 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); | |
3981 | return r; | |
3982 | } | |
3983 | ||
3984 | if (status.si_code == CLD_EXITED) { | |
3985 | if (status.si_status != 0) { | |
3986 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3987 | return status.si_status; |
97c4a07d LP |
3988 | } |
3989 | ||
3990 | log_debug("%s succeeded.", name); | |
3991 | return 0; | |
3992 | ||
3993 | } else if (status.si_code == CLD_KILLED || | |
3994 | status.si_code == CLD_DUMPED) { | |
3995 | ||
3996 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3997 | return -EPROTO; | |
3998 | } | |
3999 | ||
4000 | log_warning("%s failed due to unknown reason.", name); | |
4001 | return -EPROTO; | |
4002 | ||
4003 | } | |
4004 | ||
6a39419f | 4005 | _noreturn_ void freeze(void) { |
720ce21d LP |
4006 | |
4007 | /* Make sure nobody waits for us on a socket anymore */ | |
4008 | close_all_fds(NULL, 0); | |
4009 | ||
c29597a1 LP |
4010 | sync(); |
4011 | ||
3c14d26c LP |
4012 | for (;;) |
4013 | pause(); | |
4014 | } | |
4015 | ||
00dc5d76 LP |
4016 | bool null_or_empty(struct stat *st) { |
4017 | assert(st); | |
4018 | ||
4019 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
4020 | return true; | |
4021 | ||
c8f26f42 | 4022 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
4023 | return true; |
4024 | ||
4025 | return false; | |
4026 | } | |
4027 | ||
83096483 LP |
4028 | int null_or_empty_path(const char *fn) { |
4029 | struct stat st; | |
4030 | ||
4031 | assert(fn); | |
4032 | ||
4033 | if (stat(fn, &st) < 0) | |
4034 | return -errno; | |
4035 | ||
4036 | return null_or_empty(&st); | |
4037 | } | |
4038 | ||
a247755d | 4039 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
4040 | int nfd; |
4041 | DIR *d; | |
4042 | ||
4043 | if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0) | |
4044 | return NULL; | |
4045 | ||
4046 | if (!(d = fdopendir(nfd))) { | |
4047 | close_nointr_nofail(nfd); | |
4048 | return NULL; | |
4049 | } | |
4050 | ||
4051 | return d; | |
3b63d2d3 LP |
4052 | } |
4053 | ||
8a0867d6 LP |
4054 | int signal_from_string_try_harder(const char *s) { |
4055 | int signo; | |
4056 | assert(s); | |
4057 | ||
4058 | if ((signo = signal_from_string(s)) <= 0) | |
4059 | if (startswith(s, "SIG")) | |
4060 | return signal_from_string(s+3); | |
4061 | ||
4062 | return signo; | |
4063 | } | |
4064 | ||
10717a1a LP |
4065 | void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { |
4066 | ||
4067 | assert(f); | |
4068 | assert(name); | |
4069 | assert(t); | |
4070 | ||
4071 | if (!dual_timestamp_is_set(t)) | |
4072 | return; | |
4073 | ||
4074 | fprintf(f, "%s=%llu %llu\n", | |
4075 | name, | |
4076 | (unsigned long long) t->realtime, | |
4077 | (unsigned long long) t->monotonic); | |
4078 | } | |
4079 | ||
799fd0fd | 4080 | void dual_timestamp_deserialize(const char *value, dual_timestamp *t) { |
10717a1a LP |
4081 | unsigned long long a, b; |
4082 | ||
10717a1a LP |
4083 | assert(value); |
4084 | assert(t); | |
4085 | ||
4086 | if (sscanf(value, "%lli %llu", &a, &b) != 2) | |
4087 | log_debug("Failed to parse finish timestamp value %s", value); | |
4088 | else { | |
4089 | t->realtime = a; | |
4090 | t->monotonic = b; | |
4091 | } | |
4092 | } | |
4093 | ||
e23a0ce8 LP |
4094 | char *fstab_node_to_udev_node(const char *p) { |
4095 | char *dn, *t, *u; | |
4096 | int r; | |
4097 | ||
4098 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
4099 | * UTF8 chars unescaped */ | |
4100 | ||
4101 | if (startswith(p, "LABEL=")) { | |
4102 | ||
4103 | if (!(u = unquote(p+6, "\"\'"))) | |
4104 | return NULL; | |
4105 | ||
4106 | t = xescape(u, "/ "); | |
4107 | free(u); | |
4108 | ||
4109 | if (!t) | |
4110 | return NULL; | |
4111 | ||
4112 | r = asprintf(&dn, "/dev/disk/by-label/%s", t); | |
4113 | free(t); | |
4114 | ||
4115 | if (r < 0) | |
4116 | return NULL; | |
4117 | ||
4118 | return dn; | |
4119 | } | |
4120 | ||
4121 | if (startswith(p, "UUID=")) { | |
4122 | ||
4123 | if (!(u = unquote(p+5, "\"\'"))) | |
4124 | return NULL; | |
4125 | ||
4126 | t = xescape(u, "/ "); | |
4127 | free(u); | |
4128 | ||
4129 | if (!t) | |
4130 | return NULL; | |
4131 | ||
0058d7b9 | 4132 | r = asprintf(&dn, "/dev/disk/by-uuid/%s", t); |
e23a0ce8 LP |
4133 | free(t); |
4134 | ||
4135 | if (r < 0) | |
4136 | return NULL; | |
4137 | ||
4138 | return dn; | |
4139 | } | |
4140 | ||
4141 | return strdup(p); | |
4142 | } | |
4143 | ||
f212ac12 LP |
4144 | bool tty_is_vc(const char *tty) { |
4145 | assert(tty); | |
4146 | ||
4147 | if (startswith(tty, "/dev/")) | |
4148 | tty += 5; | |
4149 | ||
98a28fef LP |
4150 | return vtnr_from_tty(tty) >= 0; |
4151 | } | |
4152 | ||
d1122ad5 LP |
4153 | bool tty_is_console(const char *tty) { |
4154 | assert(tty); | |
4155 | ||
4156 | if (startswith(tty, "/dev/")) | |
4157 | tty += 5; | |
4158 | ||
4159 | return streq(tty, "console"); | |
4160 | } | |
4161 | ||
98a28fef LP |
4162 | int vtnr_from_tty(const char *tty) { |
4163 | int i, r; | |
4164 | ||
4165 | assert(tty); | |
4166 | ||
4167 | if (startswith(tty, "/dev/")) | |
4168 | tty += 5; | |
4169 | ||
4170 | if (!startswith(tty, "tty") ) | |
4171 | return -EINVAL; | |
4172 | ||
4173 | if (tty[3] < '0' || tty[3] > '9') | |
4174 | return -EINVAL; | |
4175 | ||
4176 | r = safe_atoi(tty+3, &i); | |
4177 | if (r < 0) | |
4178 | return r; | |
4179 | ||
4180 | if (i < 0 || i > 63) | |
4181 | return -EINVAL; | |
4182 | ||
4183 | return i; | |
f212ac12 LP |
4184 | } |
4185 | ||
3043935f | 4186 | bool tty_is_vc_resolve(const char *tty) { |
3030ccd7 | 4187 | char *active = NULL; |
3043935f | 4188 | bool b; |
3030ccd7 | 4189 | |
e3aa71c3 LP |
4190 | assert(tty); |
4191 | ||
4192 | if (startswith(tty, "/dev/")) | |
4193 | tty += 5; | |
4194 | ||
3d9a4122 LP |
4195 | /* Resolve where /dev/console is pointing to, if /sys is |
4196 | * actually ours (i.e. not read-only-mounted which is a sign | |
4197 | * for container setups) */ | |
4198 | if (streq(tty, "console") && path_is_read_only_fs("/sys") <= 0) | |
3030ccd7 | 4199 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { |
079a09fb LP |
4200 | /* If multiple log outputs are configured the |
4201 | * last one is what /dev/console points to */ | |
3043935f LP |
4202 | tty = strrchr(active, ' '); |
4203 | if (tty) | |
079a09fb LP |
4204 | tty++; |
4205 | else | |
4206 | tty = active; | |
3030ccd7 LP |
4207 | } |
4208 | ||
3043935f | 4209 | b = tty_is_vc(tty); |
3030ccd7 | 4210 | free(active); |
e3aa71c3 | 4211 | |
3043935f LP |
4212 | return b; |
4213 | } | |
4214 | ||
4215 | const char *default_term_for_tty(const char *tty) { | |
4216 | assert(tty); | |
4217 | ||
acda6a05 | 4218 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
4219 | } |
4220 | ||
87d2c1ff | 4221 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
4222 | assert(de); |
4223 | ||
4224 | if (ignore_file(de->d_name)) | |
4225 | return false; | |
4226 | ||
4227 | if (de->d_type != DT_REG && | |
4228 | de->d_type != DT_LNK && | |
4229 | de->d_type != DT_UNKNOWN) | |
4230 | return false; | |
4231 | ||
4232 | return true; | |
4233 | } | |
4234 | ||
87d2c1ff LP |
4235 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
4236 | assert(de); | |
4237 | ||
4238 | if (!dirent_is_file(de)) | |
4239 | return false; | |
4240 | ||
4241 | return endswith(de->d_name, suffix); | |
4242 | } | |
4243 | ||
83cc030f LP |
4244 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
4245 | DIR *_d = NULL; | |
4246 | struct dirent *de; | |
4247 | Hashmap *pids = NULL; | |
4248 | ||
4249 | assert(directory); | |
4250 | ||
4251 | /* Executes all binaries in a directory in parallel and waits | |
4252 | * until all they all finished. */ | |
4253 | ||
4254 | if (!d) { | |
4255 | if (!(_d = opendir(directory))) { | |
4256 | ||
4257 | if (errno == ENOENT) | |
4258 | return; | |
4259 | ||
4260 | log_error("Failed to enumerate directory %s: %m", directory); | |
4261 | return; | |
4262 | } | |
4263 | ||
4264 | d = _d; | |
4265 | } | |
4266 | ||
4267 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
4268 | log_error("Failed to allocate set."); | |
4269 | goto finish; | |
4270 | } | |
4271 | ||
4272 | while ((de = readdir(d))) { | |
4273 | char *path; | |
4274 | pid_t pid; | |
4275 | int k; | |
4276 | ||
fb19a739 | 4277 | if (!dirent_is_file(de)) |
83cc030f LP |
4278 | continue; |
4279 | ||
4280 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
4281 | log_error("Out of memory"); | |
4282 | continue; | |
4283 | } | |
4284 | ||
4285 | if ((pid = fork()) < 0) { | |
4286 | log_error("Failed to fork: %m"); | |
4287 | free(path); | |
4288 | continue; | |
4289 | } | |
4290 | ||
4291 | if (pid == 0) { | |
4292 | char *_argv[2]; | |
4293 | /* Child */ | |
4294 | ||
4295 | if (!argv) { | |
4296 | _argv[0] = path; | |
4297 | _argv[1] = NULL; | |
4298 | argv = _argv; | |
4299 | } else | |
6edd7d0a | 4300 | argv[0] = path; |
83cc030f LP |
4301 | |
4302 | execv(path, argv); | |
4303 | ||
4304 | log_error("Failed to execute %s: %m", path); | |
4305 | _exit(EXIT_FAILURE); | |
4306 | } | |
4307 | ||
4308 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
4309 | ||
4310 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
4311 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
4312 | free(path); | |
4313 | } | |
4314 | } | |
4315 | ||
4316 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 4317 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
83cc030f LP |
4318 | siginfo_t si; |
4319 | char *path; | |
4320 | ||
4321 | zero(si); | |
ec3f9b53 | 4322 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
4323 | |
4324 | if (errno == EINTR) | |
4325 | continue; | |
4326 | ||
4327 | log_error("waitid() failed: %m"); | |
4328 | goto finish; | |
4329 | } | |
4330 | ||
4331 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
4332 | if (!is_clean_exit(si.si_code, si.si_status)) { | |
4333 | if (si.si_code == CLD_EXITED) | |
4334 | log_error("%s exited with exit status %i.", path, si.si_status); | |
4335 | else | |
4336 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
4337 | } else | |
4338 | log_debug("%s exited successfully.", path); | |
4339 | ||
4340 | free(path); | |
4341 | } | |
4342 | } | |
4343 | ||
4344 | finish: | |
4345 | if (_d) | |
4346 | closedir(_d); | |
4347 | ||
4348 | if (pids) | |
4349 | hashmap_free_free(pids); | |
4350 | } | |
4351 | ||
430c18ed LP |
4352 | int kill_and_sigcont(pid_t pid, int sig) { |
4353 | int r; | |
4354 | ||
4355 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4356 | ||
4357 | if (r >= 0) | |
4358 | kill(pid, SIGCONT); | |
4359 | ||
4360 | return r; | |
4361 | } | |
4362 | ||
05feefe0 LP |
4363 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4364 | const char *i; | |
4365 | ||
4366 | if (!nulstr) | |
4367 | return false; | |
4368 | ||
4369 | NULSTR_FOREACH(i, nulstr) | |
4370 | if (streq(i, needle)) | |
4371 | return true; | |
4372 | ||
4373 | return false; | |
4374 | } | |
4375 | ||
6faa1114 | 4376 | bool plymouth_running(void) { |
9408a2d2 | 4377 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4378 | } |
4379 | ||
7c3b203c LP |
4380 | void parse_syslog_priority(char **p, int *priority) { |
4381 | int a = 0, b = 0, c = 0; | |
4382 | int k; | |
4383 | ||
4384 | assert(p); | |
4385 | assert(*p); | |
4386 | assert(priority); | |
4387 | ||
4388 | if ((*p)[0] != '<') | |
4389 | return; | |
4390 | ||
4391 | if (!strchr(*p, '>')) | |
4392 | return; | |
4393 | ||
4394 | if ((*p)[2] == '>') { | |
4395 | c = undecchar((*p)[1]); | |
4396 | k = 3; | |
4397 | } else if ((*p)[3] == '>') { | |
4398 | b = undecchar((*p)[1]); | |
4399 | c = undecchar((*p)[2]); | |
4400 | k = 4; | |
4401 | } else if ((*p)[4] == '>') { | |
4402 | a = undecchar((*p)[1]); | |
4403 | b = undecchar((*p)[2]); | |
4404 | c = undecchar((*p)[3]); | |
4405 | k = 5; | |
4406 | } else | |
4407 | return; | |
4408 | ||
4409 | if (a < 0 || b < 0 || c < 0) | |
4410 | return; | |
4411 | ||
4412 | *priority = a*100+b*10+c; | |
4413 | *p += k; | |
4414 | } | |
4415 | ||
87d2c1ff LP |
4416 | void skip_syslog_pid(char **buf) { |
4417 | char *p; | |
4418 | ||
4419 | assert(buf); | |
4420 | assert(*buf); | |
4421 | ||
4422 | p = *buf; | |
4423 | ||
4424 | if (*p != '[') | |
4425 | return; | |
4426 | ||
4427 | p++; | |
4428 | p += strspn(p, "0123456789"); | |
4429 | ||
4430 | if (*p != ']') | |
4431 | return; | |
4432 | ||
4433 | p++; | |
4434 | ||
4435 | *buf = p; | |
4436 | } | |
4437 | ||
4438 | void skip_syslog_date(char **buf) { | |
4439 | enum { | |
4440 | LETTER, | |
4441 | SPACE, | |
4442 | NUMBER, | |
4443 | SPACE_OR_NUMBER, | |
4444 | COLON | |
4445 | } sequence[] = { | |
4446 | LETTER, LETTER, LETTER, | |
4447 | SPACE, | |
4448 | SPACE_OR_NUMBER, NUMBER, | |
4449 | SPACE, | |
4450 | SPACE_OR_NUMBER, NUMBER, | |
4451 | COLON, | |
4452 | SPACE_OR_NUMBER, NUMBER, | |
4453 | COLON, | |
4454 | SPACE_OR_NUMBER, NUMBER, | |
4455 | SPACE | |
4456 | }; | |
4457 | ||
4458 | char *p; | |
4459 | unsigned i; | |
4460 | ||
4461 | assert(buf); | |
4462 | assert(*buf); | |
4463 | ||
4464 | p = *buf; | |
4465 | ||
4466 | for (i = 0; i < ELEMENTSOF(sequence); i++, p++) { | |
4467 | ||
4468 | if (!*p) | |
4469 | return; | |
4470 | ||
4471 | switch (sequence[i]) { | |
4472 | ||
4473 | case SPACE: | |
4474 | if (*p != ' ') | |
4475 | return; | |
4476 | break; | |
4477 | ||
4478 | case SPACE_OR_NUMBER: | |
4479 | if (*p == ' ') | |
4480 | break; | |
4481 | ||
4482 | /* fall through */ | |
4483 | ||
4484 | case NUMBER: | |
4485 | if (*p < '0' || *p > '9') | |
4486 | return; | |
4487 | ||
4488 | break; | |
4489 | ||
4490 | case LETTER: | |
4491 | if (!(*p >= 'A' && *p <= 'Z') && | |
4492 | !(*p >= 'a' && *p <= 'z')) | |
4493 | return; | |
4494 | ||
4495 | break; | |
4496 | ||
4497 | case COLON: | |
4498 | if (*p != ':') | |
4499 | return; | |
4500 | break; | |
4501 | ||
4502 | } | |
4503 | } | |
4504 | ||
4505 | *buf = p; | |
4506 | } | |
4507 | ||
9beb3f4d LP |
4508 | char* strshorten(char *s, size_t l) { |
4509 | assert(s); | |
4510 | ||
4511 | if (l < strlen(s)) | |
4512 | s[l] = 0; | |
4513 | ||
4514 | return s; | |
4515 | } | |
4516 | ||
4517 | static bool hostname_valid_char(char c) { | |
4518 | return | |
4519 | (c >= 'a' && c <= 'z') || | |
4520 | (c >= 'A' && c <= 'Z') || | |
4521 | (c >= '0' && c <= '9') || | |
4522 | c == '-' || | |
4523 | c == '_' || | |
4524 | c == '.'; | |
4525 | } | |
4526 | ||
4527 | bool hostname_is_valid(const char *s) { | |
4528 | const char *p; | |
4529 | ||
4530 | if (isempty(s)) | |
4531 | return false; | |
4532 | ||
4533 | for (p = s; *p; p++) | |
4534 | if (!hostname_valid_char(*p)) | |
4535 | return false; | |
4536 | ||
4537 | if (p-s > HOST_NAME_MAX) | |
4538 | return false; | |
4539 | ||
4540 | return true; | |
4541 | } | |
4542 | ||
4543 | char* hostname_cleanup(char *s) { | |
4544 | char *p, *d; | |
4545 | ||
4546 | for (p = s, d = s; *p; p++) | |
4547 | if ((*p >= 'a' && *p <= 'z') || | |
4548 | (*p >= 'A' && *p <= 'Z') || | |
4549 | (*p >= '0' && *p <= '9') || | |
4550 | *p == '-' || | |
4551 | *p == '_' || | |
4552 | *p == '.') | |
4553 | *(d++) = *p; | |
4554 | ||
4555 | *d = 0; | |
4556 | ||
4557 | strshorten(s, HOST_NAME_MAX); | |
4558 | return s; | |
4559 | } | |
4560 | ||
1325aa42 LP |
4561 | int pipe_eof(int fd) { |
4562 | struct pollfd pollfd; | |
4563 | int r; | |
4564 | ||
4565 | zero(pollfd); | |
4566 | pollfd.fd = fd; | |
4567 | pollfd.events = POLLIN|POLLHUP; | |
4568 | ||
4569 | r = poll(&pollfd, 1, 0); | |
4570 | if (r < 0) | |
4571 | return -errno; | |
4572 | ||
4573 | if (r == 0) | |
4574 | return 0; | |
4575 | ||
4576 | return pollfd.revents & POLLHUP; | |
4577 | } | |
4578 | ||
8f2d43a0 | 4579 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b LP |
4580 | struct pollfd pollfd; |
4581 | int r; | |
4582 | ||
4583 | zero(pollfd); | |
4584 | pollfd.fd = fd; | |
4585 | pollfd.events = event; | |
4586 | ||
8f2d43a0 | 4587 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
4588 | if (r < 0) |
4589 | return -errno; | |
4590 | ||
4591 | if (r == 0) | |
4592 | return 0; | |
4593 | ||
4594 | return pollfd.revents; | |
4595 | } | |
4596 | ||
5a3ab509 LP |
4597 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4598 | FILE *f; | |
4599 | char *t; | |
4600 | const char *fn; | |
4601 | size_t k; | |
4602 | int fd; | |
4603 | ||
4604 | assert(path); | |
4605 | assert(_f); | |
4606 | assert(_temp_path); | |
4607 | ||
4608 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4609 | if (!t) | |
4610 | return -ENOMEM; | |
4611 | ||
9eb977db | 4612 | fn = path_get_file_name(path); |
5a3ab509 LP |
4613 | k = fn-path; |
4614 | memcpy(t, path, k); | |
4615 | t[k] = '.'; | |
4616 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4617 | ||
4618 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4619 | if (fd < 0) { | |
4620 | free(t); | |
4621 | return -errno; | |
4622 | } | |
4623 | ||
4624 | f = fdopen(fd, "we"); | |
4625 | if (!f) { | |
4626 | unlink(t); | |
4627 | free(t); | |
4628 | return -errno; | |
4629 | } | |
4630 | ||
4631 | *_f = f; | |
4632 | *_temp_path = t; | |
4633 | ||
4634 | return 0; | |
4635 | } | |
4636 | ||
6ea832a2 | 4637 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4638 | assert(fd >= 0); |
4639 | ||
6ea832a2 LP |
4640 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4641 | return -errno; | |
4642 | ||
4643 | return 0; | |
4644 | } | |
4645 | ||
4646 | int terminal_vhangup(const char *name) { | |
4647 | int fd, r; | |
4648 | ||
4649 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4650 | if (fd < 0) | |
4651 | return fd; | |
4652 | ||
4653 | r = terminal_vhangup_fd(fd); | |
4654 | close_nointr_nofail(fd); | |
4655 | ||
4656 | return r; | |
4657 | } | |
4658 | ||
4659 | int vt_disallocate(const char *name) { | |
4660 | int fd, r; | |
4661 | unsigned u; | |
6ea832a2 LP |
4662 | |
4663 | /* Deallocate the VT if possible. If not possible | |
4664 | * (i.e. because it is the active one), at least clear it | |
4665 | * entirely (including the scrollback buffer) */ | |
4666 | ||
b83bc4e9 LP |
4667 | if (!startswith(name, "/dev/")) |
4668 | return -EINVAL; | |
4669 | ||
4670 | if (!tty_is_vc(name)) { | |
4671 | /* So this is not a VT. I guess we cannot deallocate | |
4672 | * it then. But let's at least clear the screen */ | |
4673 | ||
4674 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4675 | if (fd < 0) | |
4676 | return fd; | |
4677 | ||
8585357a LP |
4678 | loop_write(fd, |
4679 | "\033[r" /* clear scrolling region */ | |
4680 | "\033[H" /* move home */ | |
4681 | "\033[2J", /* clear screen */ | |
4682 | 10, false); | |
b83bc4e9 LP |
4683 | close_nointr_nofail(fd); |
4684 | ||
4685 | return 0; | |
4686 | } | |
6ea832a2 LP |
4687 | |
4688 | if (!startswith(name, "/dev/tty")) | |
4689 | return -EINVAL; | |
4690 | ||
4691 | r = safe_atou(name+8, &u); | |
4692 | if (r < 0) | |
4693 | return r; | |
4694 | ||
4695 | if (u <= 0) | |
b83bc4e9 | 4696 | return -EINVAL; |
6ea832a2 | 4697 | |
b83bc4e9 | 4698 | /* Try to deallocate */ |
6ea832a2 LP |
4699 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4700 | if (fd < 0) | |
4701 | return fd; | |
4702 | ||
4703 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4704 | close_nointr_nofail(fd); |
6ea832a2 | 4705 | |
b83bc4e9 LP |
4706 | if (r >= 0) |
4707 | return 0; | |
6ea832a2 | 4708 | |
b83bc4e9 | 4709 | if (errno != EBUSY) |
6ea832a2 | 4710 | return -errno; |
6ea832a2 | 4711 | |
b83bc4e9 LP |
4712 | /* Couldn't deallocate, so let's clear it fully with |
4713 | * scrollback */ | |
4714 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4715 | if (fd < 0) |
b83bc4e9 | 4716 | return fd; |
6ea832a2 | 4717 | |
8585357a LP |
4718 | loop_write(fd, |
4719 | "\033[r" /* clear scrolling region */ | |
4720 | "\033[H" /* move home */ | |
4721 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4722 | 10, false); | |
b83bc4e9 | 4723 | close_nointr_nofail(fd); |
6ea832a2 | 4724 | |
b83bc4e9 | 4725 | return 0; |
6ea832a2 LP |
4726 | } |
4727 | ||
34ca941c LP |
4728 | int copy_file(const char *from, const char *to) { |
4729 | int r, fdf, fdt; | |
4730 | ||
4731 | assert(from); | |
4732 | assert(to); | |
4733 | ||
4734 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4735 | if (fdf < 0) | |
4736 | return -errno; | |
4737 | ||
4738 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
4739 | if (fdt < 0) { | |
4740 | close_nointr_nofail(fdf); | |
4741 | return -errno; | |
4742 | } | |
4743 | ||
4744 | for (;;) { | |
4745 | char buf[PIPE_BUF]; | |
4746 | ssize_t n, k; | |
4747 | ||
4748 | n = read(fdf, buf, sizeof(buf)); | |
4749 | if (n < 0) { | |
4750 | r = -errno; | |
4751 | ||
4752 | close_nointr_nofail(fdf); | |
4753 | close_nointr(fdt); | |
4754 | unlink(to); | |
4755 | ||
4756 | return r; | |
4757 | } | |
4758 | ||
4759 | if (n == 0) | |
4760 | break; | |
4761 | ||
4762 | errno = 0; | |
4763 | k = loop_write(fdt, buf, n, false); | |
4764 | if (n != k) { | |
4765 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4766 | ||
4767 | close_nointr_nofail(fdf); | |
4768 | close_nointr(fdt); | |
4769 | ||
4770 | unlink(to); | |
4771 | return r; | |
4772 | } | |
4773 | } | |
4774 | ||
4775 | close_nointr_nofail(fdf); | |
4776 | r = close_nointr(fdt); | |
4777 | ||
4778 | if (r < 0) { | |
4779 | unlink(to); | |
4780 | return r; | |
4781 | } | |
4782 | ||
4783 | return 0; | |
4784 | } | |
4785 | ||
4786 | int symlink_or_copy(const char *from, const char *to) { | |
4787 | char *pf = NULL, *pt = NULL; | |
4788 | struct stat a, b; | |
4789 | int r; | |
4790 | ||
4791 | assert(from); | |
4792 | assert(to); | |
4793 | ||
9eb977db KS |
4794 | if (path_get_parent(from, &pf) < 0 || |
4795 | path_get_parent(to, &pt) < 0) { | |
34ca941c LP |
4796 | r = -ENOMEM; |
4797 | goto finish; | |
4798 | } | |
4799 | ||
4800 | if (stat(pf, &a) < 0 || | |
4801 | stat(pt, &b) < 0) { | |
4802 | r = -errno; | |
4803 | goto finish; | |
4804 | } | |
4805 | ||
4806 | if (a.st_dev != b.st_dev) { | |
4807 | free(pf); | |
4808 | free(pt); | |
4809 | ||
4810 | return copy_file(from, to); | |
4811 | } | |
4812 | ||
4813 | if (symlink(from, to) < 0) { | |
4814 | r = -errno; | |
4815 | goto finish; | |
4816 | } | |
4817 | ||
4818 | r = 0; | |
4819 | ||
4820 | finish: | |
4821 | free(pf); | |
4822 | free(pt); | |
4823 | ||
4824 | return r; | |
4825 | } | |
4826 | ||
4827 | int symlink_or_copy_atomic(const char *from, const char *to) { | |
4828 | char *t, *x; | |
4829 | const char *fn; | |
4830 | size_t k; | |
4831 | unsigned long long ull; | |
4832 | unsigned i; | |
4833 | int r; | |
4834 | ||
4835 | assert(from); | |
4836 | assert(to); | |
4837 | ||
4838 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4839 | if (!t) | |
4840 | return -ENOMEM; | |
4841 | ||
9eb977db | 4842 | fn = path_get_file_name(to); |
34ca941c LP |
4843 | k = fn-to; |
4844 | memcpy(t, to, k); | |
4845 | t[k] = '.'; | |
4846 | x = stpcpy(t+k+1, fn); | |
4847 | ||
4848 | ull = random_ull(); | |
4849 | for (i = 0; i < 16; i++) { | |
4850 | *(x++) = hexchar(ull & 0xF); | |
4851 | ull >>= 4; | |
4852 | } | |
4853 | ||
4854 | *x = 0; | |
4855 | ||
4856 | r = symlink_or_copy(from, t); | |
4857 | if (r < 0) { | |
4858 | unlink(t); | |
4859 | free(t); | |
4860 | return r; | |
4861 | } | |
4862 | ||
4863 | if (rename(t, to) < 0) { | |
4864 | r = -errno; | |
4865 | unlink(t); | |
4866 | free(t); | |
4867 | return r; | |
4868 | } | |
4869 | ||
4870 | free(t); | |
4871 | return r; | |
4872 | } | |
4873 | ||
4d6d6518 LP |
4874 | bool display_is_local(const char *display) { |
4875 | assert(display); | |
4876 | ||
4877 | return | |
4878 | display[0] == ':' && | |
4879 | display[1] >= '0' && | |
4880 | display[1] <= '9'; | |
4881 | } | |
4882 | ||
4883 | int socket_from_display(const char *display, char **path) { | |
4884 | size_t k; | |
4885 | char *f, *c; | |
4886 | ||
4887 | assert(display); | |
4888 | assert(path); | |
4889 | ||
4890 | if (!display_is_local(display)) | |
4891 | return -EINVAL; | |
4892 | ||
4893 | k = strspn(display+1, "0123456789"); | |
4894 | ||
4895 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4896 | if (!f) | |
4897 | return -ENOMEM; | |
4898 | ||
4899 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4900 | memcpy(c, display+1, k); | |
4901 | c[k] = 0; | |
4902 | ||
4903 | *path = f; | |
4904 | ||
4905 | return 0; | |
4906 | } | |
4907 | ||
1cccf435 MV |
4908 | int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home) { |
4909 | struct passwd *p; | |
ddd88763 | 4910 | uid_t u; |
1cccf435 MV |
4911 | |
4912 | assert(username); | |
4913 | assert(*username); | |
1cccf435 MV |
4914 | |
4915 | /* We enforce some special rules for uid=0: in order to avoid | |
4916 | * NSS lookups for root we hardcode its data. */ | |
4917 | ||
4918 | if (streq(*username, "root") || streq(*username, "0")) { | |
4919 | *username = "root"; | |
4b67834e LP |
4920 | |
4921 | if (uid) | |
4922 | *uid = 0; | |
4923 | ||
4924 | if (gid) | |
4925 | *gid = 0; | |
4926 | ||
4927 | if (home) | |
4928 | *home = "/root"; | |
1cccf435 MV |
4929 | return 0; |
4930 | } | |
4931 | ||
ddd88763 | 4932 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4933 | errno = 0; |
ddd88763 | 4934 | p = getpwuid(u); |
1cccf435 MV |
4935 | |
4936 | /* If there are multiple users with the same id, make | |
4937 | * sure to leave $USER to the configured value instead | |
4938 | * of the first occurrence in the database. However if | |
4939 | * the uid was configured by a numeric uid, then let's | |
4940 | * pick the real username from /etc/passwd. */ | |
4941 | if (p) | |
4942 | *username = p->pw_name; | |
4943 | } else { | |
4944 | errno = 0; | |
4945 | p = getpwnam(*username); | |
4946 | } | |
4947 | ||
4948 | if (!p) | |
4949 | return errno != 0 ? -errno : -ESRCH; | |
4950 | ||
4b67834e LP |
4951 | if (uid) |
4952 | *uid = p->pw_uid; | |
4953 | ||
4954 | if (gid) | |
4955 | *gid = p->pw_gid; | |
4956 | ||
4957 | if (home) | |
4958 | *home = p->pw_dir; | |
4959 | ||
4960 | return 0; | |
4961 | } | |
4962 | ||
4963 | int get_group_creds(const char **groupname, gid_t *gid) { | |
4964 | struct group *g; | |
4965 | gid_t id; | |
4966 | ||
4967 | assert(groupname); | |
4968 | ||
4969 | /* We enforce some special rules for gid=0: in order to avoid | |
4970 | * NSS lookups for root we hardcode its data. */ | |
4971 | ||
4972 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4973 | *groupname = "root"; | |
4974 | ||
4975 | if (gid) | |
4976 | *gid = 0; | |
4977 | ||
4978 | return 0; | |
4979 | } | |
4980 | ||
4981 | if (parse_gid(*groupname, &id) >= 0) { | |
4982 | errno = 0; | |
4983 | g = getgrgid(id); | |
4984 | ||
4985 | if (g) | |
4986 | *groupname = g->gr_name; | |
4987 | } else { | |
4988 | errno = 0; | |
4989 | g = getgrnam(*groupname); | |
4990 | } | |
4991 | ||
4992 | if (!g) | |
4993 | return errno != 0 ? -errno : -ESRCH; | |
4994 | ||
4995 | if (gid) | |
4996 | *gid = g->gr_gid; | |
4997 | ||
1cccf435 MV |
4998 | return 0; |
4999 | } | |
5000 | ||
43673799 LP |
5001 | int in_group(const char *name) { |
5002 | gid_t gid, *gids; | |
5003 | int ngroups_max, r, i; | |
5004 | ||
5005 | r = get_group_creds(&name, &gid); | |
5006 | if (r < 0) | |
5007 | return r; | |
5008 | ||
5009 | if (getgid() == gid) | |
5010 | return 1; | |
5011 | ||
5012 | if (getegid() == gid) | |
5013 | return 1; | |
5014 | ||
5015 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
5016 | assert(ngroups_max > 0); | |
5017 | ||
5018 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
5019 | ||
5020 | r = getgroups(ngroups_max, gids); | |
5021 | if (r < 0) | |
5022 | return -errno; | |
5023 | ||
5024 | for (i = 0; i < r; i++) | |
5025 | if (gids[i] == gid) | |
5026 | return 1; | |
5027 | ||
5028 | return 0; | |
5029 | } | |
5030 | ||
8092a428 LP |
5031 | int glob_exists(const char *path) { |
5032 | glob_t g; | |
5033 | int r, k; | |
5034 | ||
5035 | assert(path); | |
5036 | ||
5037 | zero(g); | |
5038 | errno = 0; | |
5039 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
5040 | ||
5041 | if (k == GLOB_NOMATCH) | |
5042 | r = 0; | |
5043 | else if (k == GLOB_NOSPACE) | |
5044 | r = -ENOMEM; | |
5045 | else if (k == 0) | |
5046 | r = !strv_isempty(g.gl_pathv); | |
5047 | else | |
5048 | r = errno ? -errno : -EIO; | |
5049 | ||
5050 | globfree(&g); | |
5051 | ||
5052 | return r; | |
5053 | } | |
5054 | ||
83096483 LP |
5055 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
5056 | struct stat st; | |
5057 | ||
5058 | assert(d); | |
5059 | assert(de); | |
5060 | ||
5061 | if (de->d_type != DT_UNKNOWN) | |
5062 | return 0; | |
5063 | ||
5064 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
5065 | return -errno; | |
5066 | ||
5067 | de->d_type = | |
5068 | S_ISREG(st.st_mode) ? DT_REG : | |
5069 | S_ISDIR(st.st_mode) ? DT_DIR : | |
5070 | S_ISLNK(st.st_mode) ? DT_LNK : | |
5071 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
5072 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
5073 | S_ISCHR(st.st_mode) ? DT_CHR : | |
5074 | S_ISBLK(st.st_mode) ? DT_BLK : | |
5075 | DT_UNKNOWN; | |
5076 | ||
5077 | return 0; | |
5078 | } | |
5079 | ||
5080 | int in_search_path(const char *path, char **search) { | |
5081 | char **i, *parent; | |
5082 | int r; | |
5083 | ||
9eb977db | 5084 | r = path_get_parent(path, &parent); |
83096483 LP |
5085 | if (r < 0) |
5086 | return r; | |
5087 | ||
5088 | r = 0; | |
5089 | ||
5090 | STRV_FOREACH(i, search) { | |
5091 | if (path_equal(parent, *i)) { | |
5092 | r = 1; | |
5093 | break; | |
5094 | } | |
5095 | } | |
5096 | ||
5097 | free(parent); | |
5098 | ||
5099 | return r; | |
5100 | } | |
5101 | ||
034a2a52 LP |
5102 | int get_files_in_directory(const char *path, char ***list) { |
5103 | DIR *d; | |
5104 | int r = 0; | |
5105 | unsigned n = 0; | |
5106 | char **l = NULL; | |
5107 | ||
5108 | assert(path); | |
d60ef526 LP |
5109 | |
5110 | /* Returns all files in a directory in *list, and the number | |
5111 | * of files as return value. If list is NULL returns only the | |
5112 | * number */ | |
034a2a52 LP |
5113 | |
5114 | d = opendir(path); | |
8ea913b2 LP |
5115 | if (!d) |
5116 | return -errno; | |
5117 | ||
034a2a52 LP |
5118 | for (;;) { |
5119 | struct dirent buffer, *de; | |
5120 | int k; | |
5121 | ||
5122 | k = readdir_r(d, &buffer, &de); | |
5123 | if (k != 0) { | |
5124 | r = -k; | |
5125 | goto finish; | |
5126 | } | |
5127 | ||
5128 | if (!de) | |
5129 | break; | |
5130 | ||
5131 | dirent_ensure_type(d, de); | |
5132 | ||
5133 | if (!dirent_is_file(de)) | |
5134 | continue; | |
5135 | ||
d60ef526 LP |
5136 | if (list) { |
5137 | if ((unsigned) r >= n) { | |
5138 | char **t; | |
034a2a52 | 5139 | |
d60ef526 LP |
5140 | n = MAX(16, 2*r); |
5141 | t = realloc(l, sizeof(char*) * n); | |
5142 | if (!t) { | |
5143 | r = -ENOMEM; | |
5144 | goto finish; | |
5145 | } | |
034a2a52 | 5146 | |
d60ef526 LP |
5147 | l = t; |
5148 | } | |
034a2a52 | 5149 | |
d60ef526 | 5150 | assert((unsigned) r < n); |
034a2a52 | 5151 | |
d60ef526 LP |
5152 | l[r] = strdup(de->d_name); |
5153 | if (!l[r]) { | |
5154 | r = -ENOMEM; | |
5155 | goto finish; | |
5156 | } | |
034a2a52 | 5157 | |
d60ef526 LP |
5158 | l[++r] = NULL; |
5159 | } else | |
5160 | r++; | |
034a2a52 LP |
5161 | } |
5162 | ||
5163 | finish: | |
5164 | if (d) | |
5165 | closedir(d); | |
5166 | ||
d60ef526 LP |
5167 | if (r >= 0) { |
5168 | if (list) | |
5169 | *list = l; | |
5170 | } else | |
034a2a52 LP |
5171 | strv_free(l); |
5172 | ||
5173 | return r; | |
5174 | } | |
5175 | ||
b7def684 | 5176 | char *strjoin(const char *x, ...) { |
911a4828 LP |
5177 | va_list ap; |
5178 | size_t l; | |
5179 | char *r, *p; | |
5180 | ||
5181 | va_start(ap, x); | |
5182 | ||
5183 | if (x) { | |
5184 | l = strlen(x); | |
5185 | ||
5186 | for (;;) { | |
5187 | const char *t; | |
5188 | ||
5189 | t = va_arg(ap, const char *); | |
5190 | if (!t) | |
5191 | break; | |
5192 | ||
5193 | l += strlen(t); | |
5194 | } | |
5195 | } else | |
5196 | l = 0; | |
5197 | ||
5198 | va_end(ap); | |
5199 | ||
5200 | r = new(char, l+1); | |
5201 | if (!r) | |
5202 | return NULL; | |
5203 | ||
5204 | if (x) { | |
5205 | p = stpcpy(r, x); | |
5206 | ||
5207 | va_start(ap, x); | |
5208 | ||
5209 | for (;;) { | |
5210 | const char *t; | |
5211 | ||
5212 | t = va_arg(ap, const char *); | |
5213 | if (!t) | |
5214 | break; | |
5215 | ||
5216 | p = stpcpy(p, t); | |
5217 | } | |
8ea913b2 LP |
5218 | |
5219 | va_end(ap); | |
911a4828 LP |
5220 | } else |
5221 | r[0] = 0; | |
5222 | ||
5223 | return r; | |
5224 | } | |
5225 | ||
b636465b LP |
5226 | bool is_main_thread(void) { |
5227 | static __thread int cached = 0; | |
5228 | ||
5229 | if (_unlikely_(cached == 0)) | |
5230 | cached = getpid() == gettid() ? 1 : -1; | |
5231 | ||
5232 | return cached > 0; | |
5233 | } | |
5234 | ||
94959f0f LP |
5235 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
5236 | char *p, *s; | |
5237 | int r; | |
5238 | unsigned n, m; | |
5239 | ||
5240 | assert(ret); | |
5241 | ||
5242 | /* If it has a queue this is good enough for us */ | |
5243 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
5244 | return -ENOMEM; | |
5245 | ||
5246 | r = access(p, F_OK); | |
5247 | free(p); | |
5248 | ||
5249 | if (r >= 0) { | |
5250 | *ret = d; | |
5251 | return 0; | |
5252 | } | |
5253 | ||
5254 | /* If it is a partition find the originating device */ | |
5255 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
5256 | return -ENOMEM; | |
5257 | ||
5258 | r = access(p, F_OK); | |
5259 | free(p); | |
5260 | ||
5261 | if (r < 0) | |
5262 | return -ENOENT; | |
5263 | ||
5264 | /* Get parent dev_t */ | |
5265 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
5266 | return -ENOMEM; | |
5267 | ||
5268 | r = read_one_line_file(p, &s); | |
5269 | free(p); | |
5270 | ||
5271 | if (r < 0) | |
5272 | return r; | |
5273 | ||
5274 | r = sscanf(s, "%u:%u", &m, &n); | |
5275 | free(s); | |
5276 | ||
5277 | if (r != 2) | |
5278 | return -EINVAL; | |
5279 | ||
5280 | /* Only return this if it is really good enough for us. */ | |
5281 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
5282 | return -ENOMEM; | |
5283 | ||
5284 | r = access(p, F_OK); | |
5285 | free(p); | |
5286 | ||
5287 | if (r >= 0) { | |
5288 | *ret = makedev(m, n); | |
5289 | return 0; | |
5290 | } | |
5291 | ||
5292 | return -ENOENT; | |
5293 | } | |
5294 | ||
8d53b453 | 5295 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
5296 | struct stat st; |
5297 | ||
5298 | assert(p); | |
5299 | ||
5300 | if (lstat(p, &st) < 0) | |
5301 | return -errno; | |
5302 | ||
5303 | return | |
8d53b453 | 5304 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
5305 | (st.st_mode & S_ISVTX); |
5306 | } | |
94959f0f | 5307 | |
f41607a6 LP |
5308 | static const char *const ioprio_class_table[] = { |
5309 | [IOPRIO_CLASS_NONE] = "none", | |
5310 | [IOPRIO_CLASS_RT] = "realtime", | |
5311 | [IOPRIO_CLASS_BE] = "best-effort", | |
5312 | [IOPRIO_CLASS_IDLE] = "idle" | |
5313 | }; | |
5314 | ||
5315 | DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int); | |
5316 | ||
5317 | static const char *const sigchld_code_table[] = { | |
5318 | [CLD_EXITED] = "exited", | |
5319 | [CLD_KILLED] = "killed", | |
5320 | [CLD_DUMPED] = "dumped", | |
5321 | [CLD_TRAPPED] = "trapped", | |
5322 | [CLD_STOPPED] = "stopped", | |
5323 | [CLD_CONTINUED] = "continued", | |
5324 | }; | |
5325 | ||
5326 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
5327 | ||
5328 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
5329 | [LOG_FAC(LOG_KERN)] = "kern", | |
5330 | [LOG_FAC(LOG_USER)] = "user", | |
5331 | [LOG_FAC(LOG_MAIL)] = "mail", | |
5332 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
5333 | [LOG_FAC(LOG_AUTH)] = "auth", | |
5334 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
5335 | [LOG_FAC(LOG_LPR)] = "lpr", | |
5336 | [LOG_FAC(LOG_NEWS)] = "news", | |
5337 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
5338 | [LOG_FAC(LOG_CRON)] = "cron", | |
5339 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
5340 | [LOG_FAC(LOG_FTP)] = "ftp", | |
5341 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
5342 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
5343 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
5344 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
5345 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
5346 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
5347 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
5348 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
5349 | }; | |
5350 | ||
5351 | DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int); | |
5352 | ||
5353 | static const char *const log_level_table[] = { | |
5354 | [LOG_EMERG] = "emerg", | |
5355 | [LOG_ALERT] = "alert", | |
5356 | [LOG_CRIT] = "crit", | |
5357 | [LOG_ERR] = "err", | |
5358 | [LOG_WARNING] = "warning", | |
5359 | [LOG_NOTICE] = "notice", | |
5360 | [LOG_INFO] = "info", | |
5361 | [LOG_DEBUG] = "debug" | |
5362 | }; | |
5363 | ||
5364 | DEFINE_STRING_TABLE_LOOKUP(log_level, int); | |
5365 | ||
5366 | static const char* const sched_policy_table[] = { | |
5367 | [SCHED_OTHER] = "other", | |
5368 | [SCHED_BATCH] = "batch", | |
5369 | [SCHED_IDLE] = "idle", | |
5370 | [SCHED_FIFO] = "fifo", | |
5371 | [SCHED_RR] = "rr" | |
5372 | }; | |
5373 | ||
5374 | DEFINE_STRING_TABLE_LOOKUP(sched_policy, int); | |
5375 | ||
5376 | static const char* const rlimit_table[] = { | |
5377 | [RLIMIT_CPU] = "LimitCPU", | |
5378 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
5379 | [RLIMIT_DATA] = "LimitDATA", | |
5380 | [RLIMIT_STACK] = "LimitSTACK", | |
5381 | [RLIMIT_CORE] = "LimitCORE", | |
5382 | [RLIMIT_RSS] = "LimitRSS", | |
5383 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
5384 | [RLIMIT_AS] = "LimitAS", | |
5385 | [RLIMIT_NPROC] = "LimitNPROC", | |
5386 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
5387 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
5388 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
5389 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
5390 | [RLIMIT_NICE] = "LimitNICE", | |
5391 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
5392 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
5393 | }; | |
5394 | ||
5395 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
5396 | ||
5397 | static const char* const ip_tos_table[] = { | |
5398 | [IPTOS_LOWDELAY] = "low-delay", | |
5399 | [IPTOS_THROUGHPUT] = "throughput", | |
5400 | [IPTOS_RELIABILITY] = "reliability", | |
5401 | [IPTOS_LOWCOST] = "low-cost", | |
5402 | }; | |
5403 | ||
5404 | DEFINE_STRING_TABLE_LOOKUP(ip_tos, int); | |
5405 | ||
4e240ab0 | 5406 | static const char *const __signal_table[] = { |
f41607a6 LP |
5407 | [SIGHUP] = "HUP", |
5408 | [SIGINT] = "INT", | |
5409 | [SIGQUIT] = "QUIT", | |
5410 | [SIGILL] = "ILL", | |
5411 | [SIGTRAP] = "TRAP", | |
5412 | [SIGABRT] = "ABRT", | |
5413 | [SIGBUS] = "BUS", | |
5414 | [SIGFPE] = "FPE", | |
5415 | [SIGKILL] = "KILL", | |
5416 | [SIGUSR1] = "USR1", | |
5417 | [SIGSEGV] = "SEGV", | |
5418 | [SIGUSR2] = "USR2", | |
5419 | [SIGPIPE] = "PIPE", | |
5420 | [SIGALRM] = "ALRM", | |
5421 | [SIGTERM] = "TERM", | |
5422 | #ifdef SIGSTKFLT | |
5423 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
5424 | #endif | |
5425 | [SIGCHLD] = "CHLD", | |
5426 | [SIGCONT] = "CONT", | |
5427 | [SIGSTOP] = "STOP", | |
5428 | [SIGTSTP] = "TSTP", | |
5429 | [SIGTTIN] = "TTIN", | |
5430 | [SIGTTOU] = "TTOU", | |
5431 | [SIGURG] = "URG", | |
5432 | [SIGXCPU] = "XCPU", | |
5433 | [SIGXFSZ] = "XFSZ", | |
5434 | [SIGVTALRM] = "VTALRM", | |
5435 | [SIGPROF] = "PROF", | |
5436 | [SIGWINCH] = "WINCH", | |
5437 | [SIGIO] = "IO", | |
5438 | [SIGPWR] = "PWR", | |
5439 | [SIGSYS] = "SYS" | |
5440 | }; | |
5441 | ||
4e240ab0 MS |
5442 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
5443 | ||
5444 | const char *signal_to_string(int signo) { | |
5445 | static __thread char buf[12]; | |
5446 | const char *name; | |
5447 | ||
5448 | name = __signal_to_string(signo); | |
5449 | if (name) | |
5450 | return name; | |
5451 | ||
5452 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
5453 | snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN); | |
5454 | else | |
5455 | snprintf(buf, sizeof(buf) - 1, "%d", signo); | |
5456 | char_array_0(buf); | |
5457 | return buf; | |
5458 | } | |
5459 | ||
5460 | int signal_from_string(const char *s) { | |
5461 | int signo; | |
5462 | int offset = 0; | |
5463 | unsigned u; | |
5464 | ||
5465 | signo =__signal_from_string(s); | |
5466 | if (signo > 0) | |
5467 | return signo; | |
5468 | ||
5469 | if (startswith(s, "RTMIN+")) { | |
5470 | s += 6; | |
5471 | offset = SIGRTMIN; | |
5472 | } | |
5473 | if (safe_atou(s, &u) >= 0) { | |
5474 | signo = (int) u + offset; | |
5475 | if (signo > 0 && signo < _NSIG) | |
5476 | return signo; | |
5477 | } | |
5478 | return -1; | |
5479 | } | |
65457142 FC |
5480 | |
5481 | bool kexec_loaded(void) { | |
5482 | bool loaded = false; | |
5483 | char *s; | |
5484 | ||
5485 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
5486 | if (s[0] == '1') | |
5487 | loaded = true; | |
5488 | free(s); | |
5489 | } | |
5490 | return loaded; | |
5491 | } | |
fb9de93d LP |
5492 | |
5493 | int strdup_or_null(const char *a, char **b) { | |
5494 | char *c; | |
5495 | ||
5496 | assert(b); | |
5497 | ||
5498 | if (!a) { | |
5499 | *b = NULL; | |
5500 | return 0; | |
5501 | } | |
5502 | ||
5503 | c = strdup(a); | |
5504 | if (!c) | |
5505 | return -ENOMEM; | |
5506 | ||
5507 | *b = c; | |
5508 | return 0; | |
5509 | } | |
64685e0c | 5510 | |
87d2c1ff LP |
5511 | int prot_from_flags(int flags) { |
5512 | ||
5513 | switch (flags & O_ACCMODE) { | |
5514 | ||
5515 | case O_RDONLY: | |
5516 | return PROT_READ; | |
5517 | ||
5518 | case O_WRONLY: | |
5519 | return PROT_WRITE; | |
5520 | ||
5521 | case O_RDWR: | |
5522 | return PROT_READ|PROT_WRITE; | |
5523 | ||
5524 | default: | |
5525 | return -EINVAL; | |
5526 | } | |
7c99e0c1 | 5527 | } |
689b9a22 | 5528 | |
babfc091 | 5529 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 5530 | unsigned i; |
babfc091 LP |
5531 | |
5532 | static const struct { | |
5533 | const char *suffix; | |
5534 | off_t factor; | |
5535 | } table[] = { | |
32895bb3 LP |
5536 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
5537 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
5538 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
5539 | { "G", 1024ULL*1024ULL*1024ULL }, | |
5540 | { "M", 1024ULL*1024ULL }, | |
5541 | { "K", 1024ULL }, | |
5542 | }; | |
5543 | ||
5544 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
5545 | ||
5546 | if (t >= table[i].factor) { | |
5547 | snprintf(buf, l, | |
5548 | "%llu.%llu%s", | |
5549 | (unsigned long long) (t / table[i].factor), | |
5550 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
5551 | table[i].suffix); | |
5552 | ||
5553 | goto finish; | |
5554 | } | |
5555 | } | |
5556 | ||
5557 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
5558 | ||
5559 | finish: | |
5560 | buf[l-1] = 0; | |
5561 | return buf; | |
5562 | ||
5563 | } | |
55d7bfc1 LP |
5564 | |
5565 | void* memdup(const void *p, size_t l) { | |
5566 | void *r; | |
5567 | ||
5568 | assert(p); | |
5569 | ||
5570 | r = malloc(l); | |
5571 | if (!r) | |
5572 | return NULL; | |
5573 | ||
5574 | memcpy(r, p, l); | |
5575 | return r; | |
5576 | } | |
bb99a35a LP |
5577 | |
5578 | int fd_inc_sndbuf(int fd, size_t n) { | |
5579 | int r, value; | |
5580 | socklen_t l = sizeof(value); | |
5581 | ||
5582 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
5583 | if (r >= 0 && | |
5584 | l == sizeof(value) && | |
5585 | (size_t) value >= n*2) | |
5586 | return 0; | |
5587 | ||
5588 | value = (int) n; | |
5589 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
5590 | if (r < 0) | |
5591 | return -errno; | |
5592 | ||
5593 | return 1; | |
5594 | } | |
5595 | ||
5596 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5597 | int r, value; | |
5598 | socklen_t l = sizeof(value); | |
5599 | ||
5600 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
5601 | if (r >= 0 && | |
5602 | l == sizeof(value) && | |
5603 | (size_t) value >= n*2) | |
5604 | return 0; | |
5605 | ||
5606 | value = (int) n; | |
5607 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
5608 | if (r < 0) | |
5609 | return -errno; | |
5610 | ||
5611 | return 1; | |
5612 | } | |
6bb92a16 | 5613 | |
9bdc770c | 5614 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
5615 | pid_t parent_pid, agent_pid; |
5616 | int fd; | |
5617 | bool stdout_is_tty, stderr_is_tty; | |
5618 | unsigned n, i; | |
5619 | va_list ap; | |
5620 | char **l; | |
5621 | ||
5622 | assert(pid); | |
5623 | assert(path); | |
5624 | ||
5625 | parent_pid = getpid(); | |
5626 | ||
5627 | /* Spawns a temporary TTY agent, making sure it goes away when | |
5628 | * we go away */ | |
5629 | ||
5630 | agent_pid = fork(); | |
5631 | if (agent_pid < 0) | |
5632 | return -errno; | |
5633 | ||
5634 | if (agent_pid != 0) { | |
5635 | *pid = agent_pid; | |
5636 | return 0; | |
5637 | } | |
5638 | ||
5639 | /* In the child: | |
5640 | * | |
5641 | * Make sure the agent goes away when the parent dies */ | |
5642 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5643 | _exit(EXIT_FAILURE); | |
5644 | ||
5645 | /* Check whether our parent died before we were able | |
5646 | * to set the death signal */ | |
5647 | if (getppid() != parent_pid) | |
5648 | _exit(EXIT_SUCCESS); | |
5649 | ||
5650 | /* Don't leak fds to the agent */ | |
9bdc770c | 5651 | close_all_fds(except, n_except); |
6bb92a16 LP |
5652 | |
5653 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5654 | stderr_is_tty = isatty(STDERR_FILENO); | |
5655 | ||
5656 | if (!stdout_is_tty || !stderr_is_tty) { | |
5657 | /* Detach from stdout/stderr. and reopen | |
5658 | * /dev/tty for them. This is important to | |
5659 | * ensure that when systemctl is started via | |
5660 | * popen() or a similar call that expects to | |
5661 | * read EOF we actually do generate EOF and | |
5662 | * not delay this indefinitely by because we | |
5663 | * keep an unused copy of stdin around. */ | |
5664 | fd = open("/dev/tty", O_WRONLY); | |
5665 | if (fd < 0) { | |
5666 | log_error("Failed to open /dev/tty: %m"); | |
5667 | _exit(EXIT_FAILURE); | |
5668 | } | |
5669 | ||
5670 | if (!stdout_is_tty) | |
5671 | dup2(fd, STDOUT_FILENO); | |
5672 | ||
5673 | if (!stderr_is_tty) | |
5674 | dup2(fd, STDERR_FILENO); | |
5675 | ||
5676 | if (fd > 2) | |
5677 | close(fd); | |
5678 | } | |
5679 | ||
5680 | /* Count arguments */ | |
5681 | va_start(ap, path); | |
5682 | for (n = 0; va_arg(ap, char*); n++) | |
5683 | ; | |
5684 | va_end(ap); | |
5685 | ||
5686 | /* Allocate strv */ | |
5687 | l = alloca(sizeof(char *) * (n + 1)); | |
5688 | ||
5689 | /* Fill in arguments */ | |
5690 | va_start(ap, path); | |
5691 | for (i = 0; i <= n; i++) | |
5692 | l[i] = va_arg(ap, char*); | |
5693 | va_end(ap); | |
5694 | ||
5695 | execv(path, l); | |
5696 | _exit(EXIT_FAILURE); | |
5697 | } | |
68faf98c LP |
5698 | |
5699 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5700 | struct rlimit highest, fixed; | |
5701 | ||
5702 | assert(rlim); | |
5703 | ||
5704 | if (setrlimit(resource, rlim) >= 0) | |
5705 | return 0; | |
5706 | ||
5707 | if (errno != EPERM) | |
5708 | return -errno; | |
5709 | ||
5710 | /* So we failed to set the desired setrlimit, then let's try | |
5711 | * to get as close as we can */ | |
5712 | assert_se(getrlimit(resource, &highest) == 0); | |
5713 | ||
5714 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5715 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5716 | ||
5717 | if (setrlimit(resource, &fixed) < 0) | |
5718 | return -errno; | |
5719 | ||
5720 | return 0; | |
5721 | } | |
3d9a4122 | 5722 | |
ab94af92 LP |
5723 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
5724 | char path[sizeof("/proc/")-1+10+sizeof("/environ")], *value = NULL; | |
5725 | int r; | |
5726 | FILE *f; | |
5727 | bool done = false; | |
5728 | size_t l; | |
5729 | ||
5730 | assert(field); | |
5731 | assert(_value); | |
5732 | ||
5733 | if (pid == 0) | |
5734 | pid = getpid(); | |
5735 | ||
5736 | snprintf(path, sizeof(path), "/proc/%lu/environ", (unsigned long) pid); | |
5737 | char_array_0(path); | |
5738 | ||
5739 | f = fopen(path, "re"); | |
5740 | if (!f) | |
5741 | return -errno; | |
5742 | ||
5743 | l = strlen(field); | |
5744 | r = 0; | |
5745 | ||
5746 | do { | |
5747 | char line[LINE_MAX]; | |
5748 | unsigned i; | |
5749 | ||
5750 | for (i = 0; i < sizeof(line)-1; i++) { | |
5751 | int c; | |
5752 | ||
5753 | c = getc(f); | |
5754 | if (_unlikely_(c == EOF)) { | |
5755 | done = true; | |
5756 | break; | |
5757 | } else if (c == 0) | |
5758 | break; | |
5759 | ||
5760 | line[i] = c; | |
5761 | } | |
5762 | line[i] = 0; | |
5763 | ||
5764 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5765 | value = strdup(line + l + 1); | |
5766 | if (!value) { | |
5767 | r = -ENOMEM; | |
5768 | break; | |
5769 | } | |
5770 | ||
5771 | r = 1; | |
5772 | break; | |
5773 | } | |
5774 | ||
5775 | } while (!done); | |
5776 | ||
5777 | fclose(f); | |
5778 | ||
5779 | if (r >= 0) | |
5780 | *_value = value; | |
5781 | ||
5782 | return r; | |
5783 | } | |
d889a206 LP |
5784 | |
5785 | int can_sleep(const char *type) { | |
5786 | char *p, *w, *state; | |
5787 | size_t l, k; | |
5788 | bool found = false; | |
5789 | int r; | |
5790 | ||
5791 | assert(type); | |
5792 | ||
5793 | r = read_one_line_file("/sys/power/state", &p); | |
5794 | if (r < 0) | |
5795 | return r == -ENOENT ? 0 : r; | |
5796 | ||
5797 | k = strlen(type); | |
5798 | ||
5799 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) { | |
5800 | if (l == k && strncmp(w, type, l) == 0) { | |
5801 | found = true; | |
5802 | break; | |
5803 | } | |
5804 | } | |
5805 | ||
5806 | free(p); | |
5807 | return found; | |
5808 | } | |
49dbfa7b LP |
5809 | |
5810 | bool is_valid_documentation_url(const char *url) { | |
5811 | assert(url); | |
5812 | ||
5813 | if (startswith(url, "http://") && url[7]) | |
5814 | return true; | |
5815 | ||
5816 | if (startswith(url, "https://") && url[8]) | |
5817 | return true; | |
5818 | ||
5819 | if (startswith(url, "file:") && url[5]) | |
5820 | return true; | |
5821 | ||
5822 | if (startswith(url, "info:") && url[5]) | |
5823 | return true; | |
5824 | ||
5825 | if (startswith(url, "man:") && url[4]) | |
5826 | return true; | |
5827 | ||
5828 | return false; | |
5829 | } | |
9be346c9 HH |
5830 | |
5831 | bool in_initrd(void) { | |
8f33b5b8 | 5832 | static int saved = -1; |
825c6fe5 | 5833 | struct statfs s; |
8f33b5b8 | 5834 | |
825c6fe5 LP |
5835 | if (saved >= 0) |
5836 | return saved; | |
5837 | ||
5838 | /* We make two checks here: | |
5839 | * | |
5840 | * 1. the flag file /etc/initrd-release must exist | |
5841 | * 2. the root file system must be a memory file system | |
5842 | * | |
5843 | * The second check is extra paranoia, since misdetecting an | |
5844 | * initrd can have bad bad consequences due the initrd | |
5845 | * emptying when transititioning to the main systemd. | |
5846 | */ | |
5847 | ||
5848 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5849 | statfs("/", &s) >= 0 && | |
5850 | (s.f_type == TMPFS_MAGIC || s.f_type == RAMFS_MAGIC); | |
9be346c9 | 5851 | |
8f33b5b8 | 5852 | return saved; |
9be346c9 | 5853 | } |
069cfc85 LP |
5854 | |
5855 | void warn_melody(void) { | |
5856 | int fd; | |
5857 | ||
5858 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5859 | if (fd < 0) | |
5860 | return; | |
5861 | ||
5862 | /* Yeah, this is synchronous. Kinda sucks. Bute well... */ | |
5863 | ||
5864 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5865 | usleep(125*USEC_PER_MSEC); | |
5866 | ||
5867 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5868 | usleep(125*USEC_PER_MSEC); | |
5869 | ||
5870 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5871 | usleep(125*USEC_PER_MSEC); | |
5872 | ||
5873 | ioctl(fd, KIOCSOUND, 0); | |
5874 | close_nointr_nofail(fd); | |
5875 | } | |
cd3bd60a LP |
5876 | |
5877 | int make_console_stdio(void) { | |
5878 | int fd, r; | |
5879 | ||
5880 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5881 | ||
5882 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5883 | if (fd < 0) { | |
5884 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5885 | return fd; | |
5886 | } | |
5887 | ||
5888 | r = make_stdio(fd); | |
5889 | if (r < 0) { | |
5890 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5891 | return r; | |
5892 | } | |
5893 | ||
5894 | return 0; | |
5895 | } | |
7c5f152a LP |
5896 | |
5897 | int get_home_dir(char **_h) { | |
5898 | char *h; | |
5899 | const char *e; | |
5900 | uid_t u; | |
5901 | struct passwd *p; | |
5902 | ||
5903 | assert(_h); | |
5904 | ||
5905 | /* Take the user specified one */ | |
5906 | e = getenv("HOME"); | |
5907 | if (e) { | |
5908 | h = strdup(e); | |
5909 | if (!h) | |
5910 | return -ENOMEM; | |
5911 | ||
5912 | *_h = h; | |
5913 | return 0; | |
5914 | } | |
5915 | ||
5916 | /* Hardcode home directory for root to avoid NSS */ | |
5917 | u = getuid(); | |
5918 | if (u == 0) { | |
5919 | h = strdup("/root"); | |
5920 | if (!h) | |
5921 | return -ENOMEM; | |
5922 | ||
5923 | *_h = h; | |
5924 | return 0; | |
5925 | } | |
5926 | ||
5927 | /* Check the database... */ | |
5928 | errno = 0; | |
5929 | p = getpwuid(u); | |
5930 | if (!p) | |
5931 | return errno ? -errno : -ENOENT; | |
5932 | ||
5933 | if (!path_is_absolute(p->pw_dir)) | |
5934 | return -EINVAL; | |
5935 | ||
5936 | h = strdup(p->pw_dir); | |
5937 | if (!h) | |
5938 | return -ENOMEM; | |
5939 | ||
5940 | *_h = h; | |
5941 | return 0; | |
5942 | } | |
5943 | ||
5944 | int get_shell(char **_sh) { | |
5945 | char *sh; | |
5946 | const char *e; | |
5947 | uid_t u; | |
5948 | struct passwd *p; | |
5949 | ||
5950 | assert(_sh); | |
5951 | ||
5952 | /* Take the user specified one */ | |
5953 | e = getenv("SHELL"); | |
5954 | if (e) { | |
5955 | sh = strdup(e); | |
5956 | if (!sh) | |
5957 | return -ENOMEM; | |
5958 | ||
5959 | *_sh = sh; | |
5960 | return 0; | |
5961 | } | |
5962 | ||
5963 | /* Hardcode home directory for root to avoid NSS */ | |
5964 | u = getuid(); | |
5965 | if (u == 0) { | |
5966 | sh = strdup("/bin/sh"); | |
5967 | if (!sh) | |
5968 | return -ENOMEM; | |
5969 | ||
5970 | *_sh = sh; | |
5971 | return 0; | |
5972 | } | |
5973 | ||
5974 | /* Check the database... */ | |
5975 | errno = 0; | |
5976 | p = getpwuid(u); | |
5977 | if (!p) | |
5978 | return errno ? -errno : -ESRCH; | |
5979 | ||
5980 | if (!path_is_absolute(p->pw_shell)) | |
5981 | return -EINVAL; | |
5982 | ||
5983 | sh = strdup(p->pw_shell); | |
5984 | if (!sh) | |
5985 | return -ENOMEM; | |
5986 | ||
5987 | *_sh = sh; | |
5988 | return 0; | |
5989 | } |