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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 | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
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> |
ac123445 | 53 | #include <sys/capability.h> |
7948c4df KS |
54 | #include <sys/time.h> |
55 | #include <linux/rtc.h> | |
60918275 LP |
56 | |
57 | #include "macro.h" | |
58 | #include "util.h" | |
1dccbe19 LP |
59 | #include "ioprio.h" |
60 | #include "missing.h" | |
a9f5d454 | 61 | #include "log.h" |
65d2ebdc | 62 | #include "strv.h" |
e51bc1a2 | 63 | #include "label.h" |
d06dacd0 | 64 | #include "exit-status.h" |
83cc030f | 65 | #include "hashmap.h" |
56cf987f | 66 | |
37f85e66 | 67 | size_t page_size(void) { |
68 | static __thread size_t pgsz = 0; | |
69 | long r; | |
70 | ||
71 | if (pgsz) | |
72 | return pgsz; | |
73 | ||
74 | assert_se((r = sysconf(_SC_PAGESIZE)) > 0); | |
75 | ||
76 | pgsz = (size_t) r; | |
77 | ||
78 | return pgsz; | |
79 | } | |
80 | ||
e05797fb LP |
81 | bool streq_ptr(const char *a, const char *b) { |
82 | ||
83 | /* Like streq(), but tries to make sense of NULL pointers */ | |
84 | ||
85 | if (a && b) | |
86 | return streq(a, b); | |
87 | ||
88 | if (!a && !b) | |
89 | return true; | |
90 | ||
91 | return false; | |
92 | } | |
93 | ||
47be870b | 94 | usec_t now(clockid_t clock_id) { |
60918275 LP |
95 | struct timespec ts; |
96 | ||
47be870b | 97 | assert_se(clock_gettime(clock_id, &ts) == 0); |
60918275 LP |
98 | |
99 | return timespec_load(&ts); | |
100 | } | |
101 | ||
63983207 | 102 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { |
871d7de4 LP |
103 | assert(ts); |
104 | ||
105 | ts->realtime = now(CLOCK_REALTIME); | |
106 | ts->monotonic = now(CLOCK_MONOTONIC); | |
107 | ||
108 | return ts; | |
109 | } | |
110 | ||
60918275 LP |
111 | usec_t timespec_load(const struct timespec *ts) { |
112 | assert(ts); | |
113 | ||
114 | return | |
115 | (usec_t) ts->tv_sec * USEC_PER_SEC + | |
116 | (usec_t) ts->tv_nsec / NSEC_PER_USEC; | |
117 | } | |
118 | ||
119 | struct timespec *timespec_store(struct timespec *ts, usec_t u) { | |
120 | assert(ts); | |
121 | ||
122 | ts->tv_sec = (time_t) (u / USEC_PER_SEC); | |
123 | ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); | |
124 | ||
125 | return ts; | |
126 | } | |
127 | ||
128 | usec_t timeval_load(const struct timeval *tv) { | |
129 | assert(tv); | |
130 | ||
131 | return | |
132 | (usec_t) tv->tv_sec * USEC_PER_SEC + | |
133 | (usec_t) tv->tv_usec; | |
134 | } | |
135 | ||
136 | struct timeval *timeval_store(struct timeval *tv, usec_t u) { | |
137 | assert(tv); | |
138 | ||
139 | tv->tv_sec = (time_t) (u / USEC_PER_SEC); | |
140 | tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); | |
141 | ||
142 | return tv; | |
143 | } | |
144 | ||
145 | bool endswith(const char *s, const char *postfix) { | |
146 | size_t sl, pl; | |
147 | ||
148 | assert(s); | |
149 | assert(postfix); | |
150 | ||
151 | sl = strlen(s); | |
152 | pl = strlen(postfix); | |
153 | ||
d4d0d4db LP |
154 | if (pl == 0) |
155 | return true; | |
156 | ||
60918275 LP |
157 | if (sl < pl) |
158 | return false; | |
159 | ||
160 | return memcmp(s + sl - pl, postfix, pl) == 0; | |
161 | } | |
162 | ||
163 | bool startswith(const char *s, const char *prefix) { | |
164 | size_t sl, pl; | |
165 | ||
166 | assert(s); | |
167 | assert(prefix); | |
168 | ||
169 | sl = strlen(s); | |
170 | pl = strlen(prefix); | |
171 | ||
d4d0d4db LP |
172 | if (pl == 0) |
173 | return true; | |
174 | ||
60918275 LP |
175 | if (sl < pl) |
176 | return false; | |
177 | ||
178 | return memcmp(s, prefix, pl) == 0; | |
179 | } | |
180 | ||
3177a7fa MAP |
181 | bool startswith_no_case(const char *s, const char *prefix) { |
182 | size_t sl, pl; | |
183 | unsigned i; | |
184 | ||
185 | assert(s); | |
186 | assert(prefix); | |
187 | ||
188 | sl = strlen(s); | |
189 | pl = strlen(prefix); | |
190 | ||
191 | if (pl == 0) | |
192 | return true; | |
193 | ||
194 | if (sl < pl) | |
195 | return false; | |
196 | ||
197 | for(i = 0; i < pl; ++i) { | |
198 | if (tolower(s[i]) != tolower(prefix[i])) | |
199 | return false; | |
200 | } | |
201 | ||
202 | return true; | |
203 | } | |
204 | ||
79d6d816 LP |
205 | bool first_word(const char *s, const char *word) { |
206 | size_t sl, wl; | |
207 | ||
208 | assert(s); | |
209 | assert(word); | |
210 | ||
211 | sl = strlen(s); | |
212 | wl = strlen(word); | |
213 | ||
214 | if (sl < wl) | |
215 | return false; | |
216 | ||
d4d0d4db LP |
217 | if (wl == 0) |
218 | return true; | |
219 | ||
79d6d816 LP |
220 | if (memcmp(s, word, wl) != 0) |
221 | return false; | |
222 | ||
d4d0d4db LP |
223 | return s[wl] == 0 || |
224 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
225 | } |
226 | ||
42f4e3c4 | 227 | int close_nointr(int fd) { |
60918275 LP |
228 | assert(fd >= 0); |
229 | ||
230 | for (;;) { | |
231 | int r; | |
232 | ||
48f82119 LP |
233 | r = close(fd); |
234 | if (r >= 0) | |
60918275 LP |
235 | return r; |
236 | ||
237 | if (errno != EINTR) | |
48f82119 | 238 | return -errno; |
60918275 LP |
239 | } |
240 | } | |
85261803 | 241 | |
85f136b5 | 242 | void close_nointr_nofail(int fd) { |
80876c20 | 243 | int saved_errno = errno; |
85f136b5 LP |
244 | |
245 | /* like close_nointr() but cannot fail, and guarantees errno | |
246 | * is unchanged */ | |
247 | ||
248 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
249 | |
250 | errno = saved_errno; | |
85f136b5 LP |
251 | } |
252 | ||
5b6319dc LP |
253 | void close_many(const int fds[], unsigned n_fd) { |
254 | unsigned i; | |
255 | ||
256 | for (i = 0; i < n_fd; i++) | |
257 | close_nointr_nofail(fds[i]); | |
258 | } | |
259 | ||
85261803 LP |
260 | int parse_boolean(const char *v) { |
261 | assert(v); | |
262 | ||
44d8db9e | 263 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on")) |
85261803 | 264 | return 1; |
44d8db9e | 265 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off")) |
85261803 LP |
266 | return 0; |
267 | ||
268 | return -EINVAL; | |
269 | } | |
270 | ||
3ba686c1 | 271 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 272 | unsigned long ul = 0; |
3ba686c1 LP |
273 | pid_t pid; |
274 | int r; | |
275 | ||
276 | assert(s); | |
277 | assert(ret_pid); | |
278 | ||
279 | if ((r = safe_atolu(s, &ul)) < 0) | |
280 | return r; | |
281 | ||
282 | pid = (pid_t) ul; | |
283 | ||
284 | if ((unsigned long) pid != ul) | |
285 | return -ERANGE; | |
286 | ||
287 | if (pid <= 0) | |
288 | return -ERANGE; | |
289 | ||
290 | *ret_pid = pid; | |
291 | return 0; | |
292 | } | |
293 | ||
85261803 LP |
294 | int safe_atou(const char *s, unsigned *ret_u) { |
295 | char *x = NULL; | |
034c6ed7 | 296 | unsigned long l; |
85261803 LP |
297 | |
298 | assert(s); | |
299 | assert(ret_u); | |
300 | ||
301 | errno = 0; | |
302 | l = strtoul(s, &x, 0); | |
303 | ||
304 | if (!x || *x || errno) | |
305 | return errno ? -errno : -EINVAL; | |
306 | ||
034c6ed7 | 307 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
308 | return -ERANGE; |
309 | ||
310 | *ret_u = (unsigned) l; | |
311 | return 0; | |
312 | } | |
313 | ||
314 | int safe_atoi(const char *s, int *ret_i) { | |
315 | char *x = NULL; | |
034c6ed7 | 316 | long l; |
85261803 LP |
317 | |
318 | assert(s); | |
319 | assert(ret_i); | |
320 | ||
321 | errno = 0; | |
322 | l = strtol(s, &x, 0); | |
323 | ||
324 | if (!x || *x || errno) | |
325 | return errno ? -errno : -EINVAL; | |
326 | ||
034c6ed7 | 327 | if ((long) (int) l != l) |
85261803 LP |
328 | return -ERANGE; |
329 | ||
034c6ed7 LP |
330 | *ret_i = (int) l; |
331 | return 0; | |
332 | } | |
333 | ||
034c6ed7 LP |
334 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
335 | char *x = NULL; | |
336 | unsigned long long l; | |
337 | ||
338 | assert(s); | |
339 | assert(ret_llu); | |
340 | ||
341 | errno = 0; | |
342 | l = strtoull(s, &x, 0); | |
343 | ||
344 | if (!x || *x || errno) | |
345 | return errno ? -errno : -EINVAL; | |
346 | ||
347 | *ret_llu = l; | |
348 | return 0; | |
349 | } | |
350 | ||
351 | int safe_atolli(const char *s, long long int *ret_lli) { | |
352 | char *x = NULL; | |
353 | long long l; | |
354 | ||
355 | assert(s); | |
356 | assert(ret_lli); | |
357 | ||
358 | errno = 0; | |
359 | l = strtoll(s, &x, 0); | |
360 | ||
361 | if (!x || *x || errno) | |
362 | return errno ? -errno : -EINVAL; | |
363 | ||
364 | *ret_lli = l; | |
85261803 LP |
365 | return 0; |
366 | } | |
a41e8209 | 367 | |
a41e8209 | 368 | /* Split a string into words. */ |
65d2ebdc | 369 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
370 | char *current; |
371 | ||
372 | current = *state ? *state : (char*) c; | |
373 | ||
374 | if (!*current || *c == 0) | |
375 | return NULL; | |
376 | ||
65d2ebdc LP |
377 | current += strspn(current, separator); |
378 | *l = strcspn(current, separator); | |
82919e3d LP |
379 | *state = current+*l; |
380 | ||
381 | return (char*) current; | |
382 | } | |
383 | ||
034c6ed7 LP |
384 | /* Split a string into words, but consider strings enclosed in '' and |
385 | * "" as words even if they include spaces. */ | |
386 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
387 | char *current, *e; |
388 | bool escaped = false; | |
034c6ed7 LP |
389 | |
390 | current = *state ? *state : (char*) c; | |
391 | ||
392 | if (!*current || *c == 0) | |
393 | return NULL; | |
394 | ||
395 | current += strspn(current, WHITESPACE); | |
396 | ||
397 | if (*current == '\'') { | |
398 | current ++; | |
034c6ed7 | 399 | |
0bab36f2 LP |
400 | for (e = current; *e; e++) { |
401 | if (escaped) | |
402 | escaped = false; | |
403 | else if (*e == '\\') | |
404 | escaped = true; | |
405 | else if (*e == '\'') | |
406 | break; | |
407 | } | |
408 | ||
409 | *l = e-current; | |
410 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
411 | } else if (*current == '\"') { |
412 | current ++; | |
034c6ed7 | 413 | |
0bab36f2 LP |
414 | for (e = current; *e; e++) { |
415 | if (escaped) | |
416 | escaped = false; | |
417 | else if (*e == '\\') | |
418 | escaped = true; | |
419 | else if (*e == '\"') | |
420 | break; | |
421 | } | |
422 | ||
423 | *l = e-current; | |
424 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 425 | } else { |
0bab36f2 LP |
426 | for (e = current; *e; e++) { |
427 | if (escaped) | |
428 | escaped = false; | |
429 | else if (*e == '\\') | |
430 | escaped = true; | |
431 | else if (strchr(WHITESPACE, *e)) | |
432 | break; | |
433 | } | |
434 | *l = e-current; | |
435 | *state = e; | |
034c6ed7 LP |
436 | } |
437 | ||
438 | return (char*) current; | |
439 | } | |
440 | ||
65d2ebdc LP |
441 | char **split_path_and_make_absolute(const char *p) { |
442 | char **l; | |
443 | assert(p); | |
444 | ||
445 | if (!(l = strv_split(p, ":"))) | |
446 | return NULL; | |
447 | ||
448 | if (!strv_path_make_absolute_cwd(l)) { | |
449 | strv_free(l); | |
450 | return NULL; | |
451 | } | |
452 | ||
453 | return l; | |
454 | } | |
455 | ||
034c6ed7 LP |
456 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
457 | int r; | |
458 | FILE *f; | |
20c03b7b | 459 | char fn[PATH_MAX], line[LINE_MAX], *p; |
bb00e604 | 460 | long unsigned ppid; |
034c6ed7 | 461 | |
8480e784 | 462 | assert(pid > 0); |
034c6ed7 LP |
463 | assert(_ppid); |
464 | ||
bb00e604 | 465 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
8480e784 | 466 | char_array_0(fn); |
034c6ed7 LP |
467 | |
468 | if (!(f = fopen(fn, "r"))) | |
469 | return -errno; | |
470 | ||
471 | if (!(fgets(line, sizeof(line), f))) { | |
472 | r = -errno; | |
473 | fclose(f); | |
474 | return r; | |
475 | } | |
476 | ||
477 | fclose(f); | |
478 | ||
479 | /* Let's skip the pid and comm fields. The latter is enclosed | |
480 | * in () but does not escape any () in its value, so let's | |
481 | * skip over it manually */ | |
482 | ||
483 | if (!(p = strrchr(line, ')'))) | |
484 | return -EIO; | |
485 | ||
486 | p++; | |
487 | ||
488 | if (sscanf(p, " " | |
489 | "%*c " /* state */ | |
bb00e604 | 490 | "%lu ", /* ppid */ |
034c6ed7 LP |
491 | &ppid) != 1) |
492 | return -EIO; | |
493 | ||
bb00e604 | 494 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
495 | return -ERANGE; |
496 | ||
497 | *_ppid = (pid_t) ppid; | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
7640a5de LP |
502 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
503 | int r; | |
504 | FILE *f; | |
505 | char fn[PATH_MAX], line[LINE_MAX], *p; | |
506 | ||
507 | assert(pid > 0); | |
508 | assert(st); | |
509 | ||
510 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); | |
511 | char_array_0(fn); | |
512 | ||
513 | if (!(f = fopen(fn, "r"))) | |
514 | return -errno; | |
515 | ||
516 | if (!(fgets(line, sizeof(line), f))) { | |
517 | r = -errno; | |
518 | fclose(f); | |
519 | return r; | |
520 | } | |
521 | ||
522 | fclose(f); | |
523 | ||
524 | /* Let's skip the pid and comm fields. The latter is enclosed | |
525 | * in () but does not escape any () in its value, so let's | |
526 | * skip over it manually */ | |
527 | ||
528 | if (!(p = strrchr(line, ')'))) | |
529 | return -EIO; | |
530 | ||
531 | p++; | |
532 | ||
533 | if (sscanf(p, " " | |
534 | "%*c " /* state */ | |
535 | "%*d " /* ppid */ | |
536 | "%*d " /* pgrp */ | |
537 | "%*d " /* session */ | |
538 | "%*d " /* tty_nr */ | |
539 | "%*d " /* tpgid */ | |
540 | "%*u " /* flags */ | |
541 | "%*u " /* minflt */ | |
542 | "%*u " /* cminflt */ | |
543 | "%*u " /* majflt */ | |
544 | "%*u " /* cmajflt */ | |
545 | "%*u " /* utime */ | |
546 | "%*u " /* stime */ | |
547 | "%*d " /* cutime */ | |
548 | "%*d " /* cstime */ | |
549 | "%*d " /* priority */ | |
550 | "%*d " /* nice */ | |
551 | "%*d " /* num_threads */ | |
552 | "%*d " /* itrealvalue */ | |
553 | "%llu " /* starttime */, | |
554 | st) != 1) | |
555 | return -EIO; | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
034c6ed7 LP |
560 | int write_one_line_file(const char *fn, const char *line) { |
561 | FILE *f; | |
562 | int r; | |
563 | ||
564 | assert(fn); | |
565 | assert(line); | |
566 | ||
567 | if (!(f = fopen(fn, "we"))) | |
568 | return -errno; | |
569 | ||
34ca941c | 570 | errno = 0; |
034c6ed7 LP |
571 | if (fputs(line, f) < 0) { |
572 | r = -errno; | |
573 | goto finish; | |
574 | } | |
575 | ||
8e1bd70d LP |
576 | if (!endswith(line, "\n")) |
577 | fputc('\n', f); | |
578 | ||
151b190e LP |
579 | fflush(f); |
580 | ||
581 | if (ferror(f)) { | |
582 | if (errno != 0) | |
583 | r = -errno; | |
584 | else | |
585 | r = -EIO; | |
586 | } else | |
587 | r = 0; | |
588 | ||
034c6ed7 LP |
589 | finish: |
590 | fclose(f); | |
591 | return r; | |
592 | } | |
593 | ||
34ca941c LP |
594 | int fchmod_umask(int fd, mode_t m) { |
595 | mode_t u; | |
596 | int r; | |
597 | ||
598 | u = umask(0777); | |
599 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
600 | umask(u); | |
601 | ||
602 | return r; | |
603 | } | |
604 | ||
605 | int write_one_line_file_atomic(const char *fn, const char *line) { | |
606 | FILE *f; | |
607 | int r; | |
608 | char *p; | |
609 | ||
610 | assert(fn); | |
611 | assert(line); | |
612 | ||
613 | r = fopen_temporary(fn, &f, &p); | |
614 | if (r < 0) | |
615 | return r; | |
616 | ||
617 | fchmod_umask(fileno(f), 0644); | |
618 | ||
619 | errno = 0; | |
620 | if (fputs(line, f) < 0) { | |
621 | r = -errno; | |
622 | goto finish; | |
623 | } | |
624 | ||
625 | if (!endswith(line, "\n")) | |
626 | fputc('\n', f); | |
627 | ||
628 | fflush(f); | |
629 | ||
630 | if (ferror(f)) { | |
631 | if (errno != 0) | |
632 | r = -errno; | |
633 | else | |
634 | r = -EIO; | |
635 | } else { | |
636 | if (rename(p, fn) < 0) | |
637 | r = -errno; | |
638 | else | |
639 | r = 0; | |
640 | } | |
641 | ||
642 | finish: | |
643 | if (r < 0) | |
644 | unlink(p); | |
645 | ||
646 | fclose(f); | |
647 | free(p); | |
648 | ||
649 | return r; | |
650 | } | |
651 | ||
034c6ed7 LP |
652 | int read_one_line_file(const char *fn, char **line) { |
653 | FILE *f; | |
654 | int r; | |
97c4a07d | 655 | char t[LINE_MAX], *c; |
034c6ed7 LP |
656 | |
657 | assert(fn); | |
658 | assert(line); | |
659 | ||
660 | if (!(f = fopen(fn, "re"))) | |
661 | return -errno; | |
662 | ||
663 | if (!(fgets(t, sizeof(t), f))) { | |
664 | r = -errno; | |
665 | goto finish; | |
666 | } | |
667 | ||
668 | if (!(c = strdup(t))) { | |
669 | r = -ENOMEM; | |
670 | goto finish; | |
671 | } | |
672 | ||
6f9a471a LP |
673 | truncate_nl(c); |
674 | ||
034c6ed7 LP |
675 | *line = c; |
676 | r = 0; | |
677 | ||
678 | finish: | |
679 | fclose(f); | |
680 | return r; | |
681 | } | |
44d8db9e | 682 | |
34ca941c | 683 | int read_full_file(const char *fn, char **contents, size_t *size) { |
97c4a07d LP |
684 | FILE *f; |
685 | int r; | |
686 | size_t n, l; | |
687 | char *buf = NULL; | |
688 | struct stat st; | |
689 | ||
690 | if (!(f = fopen(fn, "re"))) | |
691 | return -errno; | |
692 | ||
693 | if (fstat(fileno(f), &st) < 0) { | |
694 | r = -errno; | |
695 | goto finish; | |
696 | } | |
697 | ||
34ca941c LP |
698 | /* Safety check */ |
699 | if (st.st_size > 4*1024*1024) { | |
700 | r = -E2BIG; | |
701 | goto finish; | |
702 | } | |
703 | ||
97c4a07d LP |
704 | n = st.st_size > 0 ? st.st_size : LINE_MAX; |
705 | l = 0; | |
706 | ||
707 | for (;;) { | |
708 | char *t; | |
709 | size_t k; | |
710 | ||
711 | if (!(t = realloc(buf, n+1))) { | |
712 | r = -ENOMEM; | |
713 | goto finish; | |
714 | } | |
715 | ||
716 | buf = t; | |
717 | k = fread(buf + l, 1, n - l, f); | |
718 | ||
719 | if (k <= 0) { | |
720 | if (ferror(f)) { | |
721 | r = -errno; | |
722 | goto finish; | |
723 | } | |
724 | ||
725 | break; | |
726 | } | |
727 | ||
728 | l += k; | |
729 | n *= 2; | |
730 | ||
731 | /* Safety check */ | |
732 | if (n > 4*1024*1024) { | |
733 | r = -E2BIG; | |
734 | goto finish; | |
735 | } | |
736 | } | |
737 | ||
738 | if (buf) | |
739 | buf[l] = 0; | |
740 | else if (!(buf = calloc(1, 1))) { | |
741 | r = -errno; | |
742 | goto finish; | |
743 | } | |
744 | ||
745 | *contents = buf; | |
746 | buf = NULL; | |
747 | ||
34ca941c LP |
748 | if (size) |
749 | *size = l; | |
750 | ||
97c4a07d LP |
751 | r = 0; |
752 | ||
753 | finish: | |
754 | fclose(f); | |
755 | free(buf); | |
756 | ||
757 | return r; | |
758 | } | |
759 | ||
760 | int parse_env_file( | |
761 | const char *fname, | |
c899f8c6 | 762 | const char *separator, ...) { |
97c4a07d | 763 | |
ce8a6aa1 | 764 | int r = 0; |
97c4a07d LP |
765 | char *contents, *p; |
766 | ||
767 | assert(fname); | |
c899f8c6 | 768 | assert(separator); |
97c4a07d | 769 | |
34ca941c | 770 | if ((r = read_full_file(fname, &contents, NULL)) < 0) |
97c4a07d LP |
771 | return r; |
772 | ||
773 | p = contents; | |
774 | for (;;) { | |
775 | const char *key = NULL; | |
776 | ||
c899f8c6 | 777 | p += strspn(p, separator); |
97c4a07d LP |
778 | p += strspn(p, WHITESPACE); |
779 | ||
780 | if (!*p) | |
781 | break; | |
782 | ||
783 | if (!strchr(COMMENTS, *p)) { | |
784 | va_list ap; | |
785 | char **value; | |
786 | ||
c899f8c6 | 787 | va_start(ap, separator); |
97c4a07d LP |
788 | while ((key = va_arg(ap, char *))) { |
789 | size_t n; | |
790 | char *v; | |
791 | ||
792 | value = va_arg(ap, char **); | |
793 | ||
794 | n = strlen(key); | |
795 | if (strncmp(p, key, n) != 0 || | |
796 | p[n] != '=') | |
797 | continue; | |
798 | ||
799 | p += n + 1; | |
c899f8c6 | 800 | n = strcspn(p, separator); |
97c4a07d LP |
801 | |
802 | if (n >= 2 && | |
e7db37dd LP |
803 | strchr(QUOTES, p[0]) && |
804 | p[n-1] == p[0]) | |
97c4a07d LP |
805 | v = strndup(p+1, n-2); |
806 | else | |
807 | v = strndup(p, n); | |
808 | ||
809 | if (!v) { | |
810 | r = -ENOMEM; | |
811 | va_end(ap); | |
812 | goto fail; | |
813 | } | |
814 | ||
dd36de4d KS |
815 | if (v[0] == '\0') { |
816 | /* return empty value strings as NULL */ | |
817 | free(v); | |
818 | v = NULL; | |
819 | } | |
820 | ||
97c4a07d LP |
821 | free(*value); |
822 | *value = v; | |
823 | ||
824 | p += n; | |
ce8a6aa1 LP |
825 | |
826 | r ++; | |
97c4a07d LP |
827 | break; |
828 | } | |
829 | va_end(ap); | |
830 | } | |
831 | ||
832 | if (!key) | |
c899f8c6 | 833 | p += strcspn(p, separator); |
97c4a07d LP |
834 | } |
835 | ||
97c4a07d LP |
836 | fail: |
837 | free(contents); | |
838 | return r; | |
839 | } | |
840 | ||
8c7be95e LP |
841 | int load_env_file( |
842 | const char *fname, | |
843 | char ***rl) { | |
844 | ||
845 | FILE *f; | |
846 | char **m = 0; | |
847 | int r; | |
848 | ||
849 | assert(fname); | |
850 | assert(rl); | |
851 | ||
852 | if (!(f = fopen(fname, "re"))) | |
853 | return -errno; | |
854 | ||
855 | while (!feof(f)) { | |
856 | char l[LINE_MAX], *p, *u; | |
857 | char **t; | |
858 | ||
859 | if (!fgets(l, sizeof(l), f)) { | |
860 | if (feof(f)) | |
861 | break; | |
862 | ||
863 | r = -errno; | |
864 | goto finish; | |
865 | } | |
866 | ||
867 | p = strstrip(l); | |
868 | ||
869 | if (!*p) | |
870 | continue; | |
871 | ||
872 | if (strchr(COMMENTS, *p)) | |
873 | continue; | |
874 | ||
875 | if (!(u = normalize_env_assignment(p))) { | |
876 | log_error("Out of memory"); | |
877 | r = -ENOMEM; | |
878 | goto finish; | |
879 | } | |
880 | ||
881 | t = strv_append(m, u); | |
882 | free(u); | |
883 | ||
884 | if (!t) { | |
885 | log_error("Out of memory"); | |
886 | r = -ENOMEM; | |
887 | goto finish; | |
888 | } | |
889 | ||
890 | strv_free(m); | |
891 | m = t; | |
892 | } | |
893 | ||
894 | r = 0; | |
895 | ||
896 | *rl = m; | |
897 | m = NULL; | |
898 | ||
899 | finish: | |
900 | if (f) | |
901 | fclose(f); | |
902 | ||
903 | strv_free(m); | |
904 | ||
905 | return r; | |
906 | } | |
907 | ||
7640a5de | 908 | int write_env_file(const char *fname, char **l) { |
34ca941c | 909 | char **i, *p; |
7640a5de LP |
910 | FILE *f; |
911 | int r; | |
912 | ||
34ca941c LP |
913 | r = fopen_temporary(fname, &f, &p); |
914 | if (r < 0) | |
915 | return r; | |
7640a5de | 916 | |
34ca941c LP |
917 | fchmod_umask(fileno(f), 0644); |
918 | ||
919 | errno = 0; | |
7640a5de LP |
920 | STRV_FOREACH(i, l) { |
921 | fputs(*i, f); | |
922 | fputc('\n', f); | |
923 | } | |
924 | ||
925 | fflush(f); | |
926 | ||
34ca941c LP |
927 | if (ferror(f)) { |
928 | if (errno != 0) | |
929 | r = -errno; | |
930 | else | |
931 | r = -EIO; | |
932 | } else { | |
933 | if (rename(p, fname) < 0) | |
934 | r = -errno; | |
935 | else | |
936 | r = 0; | |
937 | } | |
938 | ||
939 | if (r < 0) | |
940 | unlink(p); | |
941 | ||
7640a5de | 942 | fclose(f); |
34ca941c | 943 | free(p); |
7640a5de LP |
944 | |
945 | return r; | |
946 | } | |
947 | ||
7072ced8 LP |
948 | char *truncate_nl(char *s) { |
949 | assert(s); | |
950 | ||
951 | s[strcspn(s, NEWLINE)] = 0; | |
952 | return s; | |
953 | } | |
954 | ||
955 | int get_process_name(pid_t pid, char **name) { | |
956 | char *p; | |
957 | int r; | |
958 | ||
959 | assert(pid >= 1); | |
960 | assert(name); | |
961 | ||
bb00e604 | 962 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) |
7072ced8 LP |
963 | return -ENOMEM; |
964 | ||
965 | r = read_one_line_file(p, name); | |
966 | free(p); | |
967 | ||
968 | if (r < 0) | |
969 | return r; | |
970 | ||
7072ced8 LP |
971 | return 0; |
972 | } | |
973 | ||
c59760ee LP |
974 | int get_process_cmdline(pid_t pid, size_t max_length, char **line) { |
975 | char *p, *r, *k; | |
976 | int c; | |
977 | bool space = false; | |
978 | size_t left; | |
979 | FILE *f; | |
980 | ||
981 | assert(pid >= 1); | |
982 | assert(max_length > 0); | |
983 | assert(line); | |
984 | ||
985 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
986 | return -ENOMEM; | |
987 | ||
988 | f = fopen(p, "r"); | |
989 | free(p); | |
990 | ||
991 | if (!f) | |
992 | return -errno; | |
993 | ||
994 | if (!(r = new(char, max_length))) { | |
995 | fclose(f); | |
996 | return -ENOMEM; | |
997 | } | |
998 | ||
999 | k = r; | |
1000 | left = max_length; | |
1001 | while ((c = getc(f)) != EOF) { | |
1002 | ||
1003 | if (isprint(c)) { | |
1004 | if (space) { | |
1005 | if (left <= 4) | |
1006 | break; | |
1007 | ||
1008 | *(k++) = ' '; | |
057fbb58 | 1009 | left--; |
c59760ee LP |
1010 | space = false; |
1011 | } | |
1012 | ||
1013 | if (left <= 4) | |
1014 | break; | |
1015 | ||
1016 | *(k++) = (char) c; | |
057fbb58 | 1017 | left--; |
c59760ee LP |
1018 | } else |
1019 | space = true; | |
1020 | } | |
1021 | ||
1022 | if (left <= 4) { | |
1023 | size_t n = MIN(left-1, 3U); | |
1024 | memcpy(k, "...", n); | |
1025 | k[n] = 0; | |
1026 | } else | |
1027 | *k = 0; | |
1028 | ||
1029 | fclose(f); | |
1030 | ||
35d2e7ec LP |
1031 | /* Kernel threads have no argv[] */ |
1032 | if (r[0] == 0) { | |
1033 | char *t; | |
1034 | int h; | |
1035 | ||
1036 | free(r); | |
1037 | ||
1038 | if ((h = get_process_name(pid, &t)) < 0) | |
1039 | return h; | |
1040 | ||
1041 | h = asprintf(&r, "[%s]", t); | |
1042 | free(t); | |
1043 | ||
1044 | if (h < 0) | |
1045 | return -ENOMEM; | |
1046 | } | |
fa776d8e | 1047 | |
c59760ee LP |
1048 | *line = r; |
1049 | return 0; | |
1050 | } | |
1051 | ||
fab56fc5 LP |
1052 | char *strnappend(const char *s, const char *suffix, size_t b) { |
1053 | size_t a; | |
44d8db9e LP |
1054 | char *r; |
1055 | ||
fab56fc5 LP |
1056 | if (!s && !suffix) |
1057 | return strdup(""); | |
1058 | ||
1059 | if (!s) | |
1060 | return strndup(suffix, b); | |
1061 | ||
1062 | if (!suffix) | |
1063 | return strdup(s); | |
1064 | ||
44d8db9e LP |
1065 | assert(s); |
1066 | assert(suffix); | |
1067 | ||
1068 | a = strlen(s); | |
44d8db9e LP |
1069 | |
1070 | if (!(r = new(char, a+b+1))) | |
1071 | return NULL; | |
1072 | ||
1073 | memcpy(r, s, a); | |
1074 | memcpy(r+a, suffix, b); | |
1075 | r[a+b] = 0; | |
1076 | ||
1077 | return r; | |
1078 | } | |
87f0e418 | 1079 | |
fab56fc5 LP |
1080 | char *strappend(const char *s, const char *suffix) { |
1081 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
1082 | } | |
1083 | ||
87f0e418 LP |
1084 | int readlink_malloc(const char *p, char **r) { |
1085 | size_t l = 100; | |
1086 | ||
1087 | assert(p); | |
1088 | assert(r); | |
1089 | ||
1090 | for (;;) { | |
1091 | char *c; | |
1092 | ssize_t n; | |
1093 | ||
1094 | if (!(c = new(char, l))) | |
1095 | return -ENOMEM; | |
1096 | ||
1097 | if ((n = readlink(p, c, l-1)) < 0) { | |
1098 | int ret = -errno; | |
1099 | free(c); | |
1100 | return ret; | |
1101 | } | |
1102 | ||
1103 | if ((size_t) n < l-1) { | |
1104 | c[n] = 0; | |
1105 | *r = c; | |
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | free(c); | |
1110 | l *= 2; | |
1111 | } | |
1112 | } | |
1113 | ||
2c7108c4 LP |
1114 | int readlink_and_make_absolute(const char *p, char **r) { |
1115 | char *target, *k; | |
1116 | int j; | |
1117 | ||
1118 | assert(p); | |
1119 | assert(r); | |
1120 | ||
1121 | if ((j = readlink_malloc(p, &target)) < 0) | |
1122 | return j; | |
1123 | ||
1124 | k = file_in_same_dir(p, target); | |
1125 | free(target); | |
1126 | ||
1127 | if (!k) | |
1128 | return -ENOMEM; | |
1129 | ||
1130 | *r = k; | |
1131 | return 0; | |
1132 | } | |
1133 | ||
35d2e7ec LP |
1134 | int parent_of_path(const char *path, char **_r) { |
1135 | const char *e, *a = NULL, *b = NULL, *p; | |
1136 | char *r; | |
1137 | bool slash = false; | |
1138 | ||
1139 | assert(path); | |
1140 | assert(_r); | |
1141 | ||
1142 | if (!*path) | |
1143 | return -EINVAL; | |
1144 | ||
1145 | for (e = path; *e; e++) { | |
1146 | ||
1147 | if (!slash && *e == '/') { | |
1148 | a = b; | |
1149 | b = e; | |
1150 | slash = true; | |
1151 | } else if (slash && *e != '/') | |
1152 | slash = false; | |
1153 | } | |
1154 | ||
1155 | if (*(e-1) == '/') | |
1156 | p = a; | |
1157 | else | |
1158 | p = b; | |
1159 | ||
1160 | if (!p) | |
1161 | return -EINVAL; | |
1162 | ||
1163 | if (p == path) | |
1164 | r = strdup("/"); | |
1165 | else | |
1166 | r = strndup(path, p-path); | |
1167 | ||
1168 | if (!r) | |
1169 | return -ENOMEM; | |
1170 | ||
1171 | *_r = r; | |
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | ||
87f0e418 LP |
1176 | char *file_name_from_path(const char *p) { |
1177 | char *r; | |
1178 | ||
1179 | assert(p); | |
1180 | ||
1181 | if ((r = strrchr(p, '/'))) | |
1182 | return r + 1; | |
1183 | ||
1184 | return (char*) p; | |
1185 | } | |
0301abf4 LP |
1186 | |
1187 | bool path_is_absolute(const char *p) { | |
1188 | assert(p); | |
1189 | ||
1190 | return p[0] == '/'; | |
1191 | } | |
1192 | ||
1193 | bool is_path(const char *p) { | |
1194 | ||
1195 | return !!strchr(p, '/'); | |
1196 | } | |
1197 | ||
1198 | char *path_make_absolute(const char *p, const char *prefix) { | |
1199 | char *r; | |
1200 | ||
1201 | assert(p); | |
1202 | ||
65d2ebdc LP |
1203 | /* Makes every item in the list an absolute path by prepending |
1204 | * the prefix, if specified and necessary */ | |
1205 | ||
0301abf4 LP |
1206 | if (path_is_absolute(p) || !prefix) |
1207 | return strdup(p); | |
1208 | ||
1209 | if (asprintf(&r, "%s/%s", prefix, p) < 0) | |
1210 | return NULL; | |
1211 | ||
1212 | return r; | |
1213 | } | |
2a987ee8 | 1214 | |
65d2ebdc LP |
1215 | char *path_make_absolute_cwd(const char *p) { |
1216 | char *cwd, *r; | |
1217 | ||
1218 | assert(p); | |
1219 | ||
1220 | /* Similar to path_make_absolute(), but prefixes with the | |
1221 | * current working directory. */ | |
1222 | ||
1223 | if (path_is_absolute(p)) | |
1224 | return strdup(p); | |
1225 | ||
1226 | if (!(cwd = get_current_dir_name())) | |
1227 | return NULL; | |
1228 | ||
1229 | r = path_make_absolute(p, cwd); | |
1230 | free(cwd); | |
1231 | ||
1232 | return r; | |
1233 | } | |
1234 | ||
1235 | char **strv_path_make_absolute_cwd(char **l) { | |
1236 | char **s; | |
1237 | ||
1238 | /* Goes through every item in the string list and makes it | |
1239 | * absolute. This works in place and won't rollback any | |
1240 | * changes on failure. */ | |
1241 | ||
1242 | STRV_FOREACH(s, l) { | |
1243 | char *t; | |
1244 | ||
1245 | if (!(t = path_make_absolute_cwd(*s))) | |
1246 | return NULL; | |
1247 | ||
1248 | free(*s); | |
1249 | *s = t; | |
1250 | } | |
1251 | ||
1252 | return l; | |
1253 | } | |
1254 | ||
c3f6d675 LP |
1255 | char **strv_path_canonicalize(char **l) { |
1256 | char **s; | |
1257 | unsigned k = 0; | |
1258 | bool enomem = false; | |
1259 | ||
1260 | if (strv_isempty(l)) | |
1261 | return l; | |
1262 | ||
1263 | /* Goes through every item in the string list and canonicalize | |
1264 | * the path. This works in place and won't rollback any | |
1265 | * changes on failure. */ | |
1266 | ||
1267 | STRV_FOREACH(s, l) { | |
1268 | char *t, *u; | |
1269 | ||
1270 | t = path_make_absolute_cwd(*s); | |
1271 | free(*s); | |
1272 | ||
1273 | if (!t) { | |
1274 | enomem = true; | |
1275 | continue; | |
1276 | } | |
1277 | ||
1278 | errno = 0; | |
1279 | u = canonicalize_file_name(t); | |
1280 | free(t); | |
1281 | ||
1282 | if (!u) { | |
1283 | if (errno == ENOMEM || !errno) | |
1284 | enomem = true; | |
1285 | ||
1286 | continue; | |
1287 | } | |
1288 | ||
1289 | l[k++] = u; | |
1290 | } | |
1291 | ||
1292 | l[k] = NULL; | |
1293 | ||
1294 | if (enomem) | |
1295 | return NULL; | |
1296 | ||
1297 | return l; | |
a9dd2082 LP |
1298 | } |
1299 | ||
1300 | char **strv_path_remove_empty(char **l) { | |
1301 | char **f, **t; | |
1302 | ||
1303 | if (!l) | |
1304 | return NULL; | |
1305 | ||
1306 | for (f = t = l; *f; f++) { | |
1307 | ||
1308 | if (dir_is_empty(*f) > 0) { | |
1309 | free(*f); | |
1310 | continue; | |
1311 | } | |
1312 | ||
1313 | *(t++) = *f; | |
1314 | } | |
1315 | ||
1316 | *t = NULL; | |
1317 | return l; | |
c3f6d675 LP |
1318 | } |
1319 | ||
2a987ee8 LP |
1320 | int reset_all_signal_handlers(void) { |
1321 | int sig; | |
1322 | ||
1323 | for (sig = 1; sig < _NSIG; sig++) { | |
1324 | struct sigaction sa; | |
1325 | ||
1326 | if (sig == SIGKILL || sig == SIGSTOP) | |
1327 | continue; | |
1328 | ||
1329 | zero(sa); | |
1330 | sa.sa_handler = SIG_DFL; | |
431c32bf | 1331 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
1332 | |
1333 | /* On Linux the first two RT signals are reserved by | |
1334 | * glibc, and sigaction() will return EINVAL for them. */ | |
1335 | if ((sigaction(sig, &sa, NULL) < 0)) | |
1336 | if (errno != EINVAL) | |
1337 | return -errno; | |
1338 | } | |
1339 | ||
8e274523 | 1340 | return 0; |
2a987ee8 | 1341 | } |
4a72ff34 LP |
1342 | |
1343 | char *strstrip(char *s) { | |
1344 | char *e, *l = NULL; | |
1345 | ||
1346 | /* Drops trailing whitespace. Modifies the string in | |
1347 | * place. Returns pointer to first non-space character */ | |
1348 | ||
1349 | s += strspn(s, WHITESPACE); | |
1350 | ||
1351 | for (e = s; *e; e++) | |
1352 | if (!strchr(WHITESPACE, *e)) | |
1353 | l = e; | |
1354 | ||
1355 | if (l) | |
1356 | *(l+1) = 0; | |
1357 | else | |
1358 | *s = 0; | |
1359 | ||
1360 | return s; | |
4a72ff34 LP |
1361 | } |
1362 | ||
ee9b5e01 LP |
1363 | char *delete_chars(char *s, const char *bad) { |
1364 | char *f, *t; | |
1365 | ||
1366 | /* Drops all whitespace, regardless where in the string */ | |
1367 | ||
1368 | for (f = s, t = s; *f; f++) { | |
1369 | if (strchr(bad, *f)) | |
1370 | continue; | |
1371 | ||
1372 | *(t++) = *f; | |
1373 | } | |
1374 | ||
1375 | *t = 0; | |
1376 | ||
1377 | return s; | |
1378 | } | |
1379 | ||
4a72ff34 LP |
1380 | char *file_in_same_dir(const char *path, const char *filename) { |
1381 | char *e, *r; | |
1382 | size_t k; | |
1383 | ||
1384 | assert(path); | |
1385 | assert(filename); | |
1386 | ||
1387 | /* This removes the last component of path and appends | |
1388 | * filename, unless the latter is absolute anyway or the | |
1389 | * former isn't */ | |
1390 | ||
1391 | if (path_is_absolute(filename)) | |
1392 | return strdup(filename); | |
1393 | ||
1394 | if (!(e = strrchr(path, '/'))) | |
1395 | return strdup(filename); | |
1396 | ||
1397 | k = strlen(filename); | |
1398 | if (!(r = new(char, e-path+1+k+1))) | |
1399 | return NULL; | |
1400 | ||
1401 | memcpy(r, path, e-path+1); | |
1402 | memcpy(r+(e-path)+1, filename, k+1); | |
1403 | ||
1404 | return r; | |
1405 | } | |
fb624d04 | 1406 | |
8c6db833 LP |
1407 | int safe_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
1408 | struct stat st; | |
1409 | ||
56cf987f | 1410 | if (label_mkdir(path, mode) >= 0) |
8c6db833 LP |
1411 | if (chmod_and_chown(path, mode, uid, gid) < 0) |
1412 | return -errno; | |
1413 | ||
1414 | if (lstat(path, &st) < 0) | |
1415 | return -errno; | |
1416 | ||
1417 | if ((st.st_mode & 0777) != mode || | |
1418 | st.st_uid != uid || | |
1419 | st.st_gid != gid || | |
1420 | !S_ISDIR(st.st_mode)) { | |
1421 | errno = EEXIST; | |
1422 | return -errno; | |
1423 | } | |
1424 | ||
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | ||
a9f5d454 LP |
1429 | int mkdir_parents(const char *path, mode_t mode) { |
1430 | const char *p, *e; | |
1431 | ||
1432 | assert(path); | |
1433 | ||
1434 | /* Creates every parent directory in the path except the last | |
1435 | * component. */ | |
1436 | ||
1437 | p = path + strspn(path, "/"); | |
1438 | for (;;) { | |
1439 | int r; | |
1440 | char *t; | |
1441 | ||
1442 | e = p + strcspn(p, "/"); | |
1443 | p = e + strspn(e, "/"); | |
1444 | ||
1445 | /* Is this the last component? If so, then we're | |
1446 | * done */ | |
1447 | if (*p == 0) | |
1448 | return 0; | |
1449 | ||
1450 | if (!(t = strndup(path, e - path))) | |
1451 | return -ENOMEM; | |
1452 | ||
56cf987f | 1453 | r = label_mkdir(t, mode); |
a9f5d454 LP |
1454 | free(t); |
1455 | ||
1456 | if (r < 0 && errno != EEXIST) | |
1457 | return -errno; | |
1458 | } | |
1459 | } | |
1460 | ||
bbd67135 LP |
1461 | int mkdir_p(const char *path, mode_t mode) { |
1462 | int r; | |
1463 | ||
1464 | /* Like mkdir -p */ | |
1465 | ||
1466 | if ((r = mkdir_parents(path, mode)) < 0) | |
1467 | return r; | |
1468 | ||
56cf987f | 1469 | if (label_mkdir(path, mode) < 0 && errno != EEXIST) |
bbd67135 LP |
1470 | return -errno; |
1471 | ||
1472 | return 0; | |
1473 | } | |
1474 | ||
c32dd69b LP |
1475 | int rmdir_parents(const char *path, const char *stop) { |
1476 | size_t l; | |
1477 | int r = 0; | |
1478 | ||
1479 | assert(path); | |
1480 | assert(stop); | |
1481 | ||
1482 | l = strlen(path); | |
1483 | ||
1484 | /* Skip trailing slashes */ | |
1485 | while (l > 0 && path[l-1] == '/') | |
1486 | l--; | |
1487 | ||
1488 | while (l > 0) { | |
1489 | char *t; | |
1490 | ||
1491 | /* Skip last component */ | |
1492 | while (l > 0 && path[l-1] != '/') | |
1493 | l--; | |
1494 | ||
1495 | /* Skip trailing slashes */ | |
1496 | while (l > 0 && path[l-1] == '/') | |
1497 | l--; | |
1498 | ||
1499 | if (l <= 0) | |
1500 | break; | |
1501 | ||
1502 | if (!(t = strndup(path, l))) | |
1503 | return -ENOMEM; | |
1504 | ||
1505 | if (path_startswith(stop, t)) { | |
1506 | free(t); | |
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | r = rmdir(t); | |
1511 | free(t); | |
1512 | ||
1513 | if (r < 0) | |
1514 | if (errno != ENOENT) | |
1515 | return -errno; | |
1516 | } | |
1517 | ||
1518 | return 0; | |
1519 | } | |
1520 | ||
1521 | ||
fb624d04 LP |
1522 | char hexchar(int x) { |
1523 | static const char table[16] = "0123456789abcdef"; | |
1524 | ||
1525 | return table[x & 15]; | |
1526 | } | |
4fe88d28 LP |
1527 | |
1528 | int unhexchar(char c) { | |
1529 | ||
1530 | if (c >= '0' && c <= '9') | |
1531 | return c - '0'; | |
1532 | ||
1533 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1534 | return c - 'a' + 10; |
4fe88d28 LP |
1535 | |
1536 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1537 | return c - 'A' + 10; |
4fe88d28 LP |
1538 | |
1539 | return -1; | |
1540 | } | |
1541 | ||
1542 | char octchar(int x) { | |
1543 | return '0' + (x & 7); | |
1544 | } | |
1545 | ||
1546 | int unoctchar(char c) { | |
1547 | ||
1548 | if (c >= '0' && c <= '7') | |
1549 | return c - '0'; | |
1550 | ||
1551 | return -1; | |
1552 | } | |
1553 | ||
5af98f82 LP |
1554 | char decchar(int x) { |
1555 | return '0' + (x % 10); | |
1556 | } | |
1557 | ||
1558 | int undecchar(char c) { | |
1559 | ||
1560 | if (c >= '0' && c <= '9') | |
1561 | return c - '0'; | |
1562 | ||
1563 | return -1; | |
1564 | } | |
1565 | ||
4fe88d28 LP |
1566 | char *cescape(const char *s) { |
1567 | char *r, *t; | |
1568 | const char *f; | |
1569 | ||
1570 | assert(s); | |
1571 | ||
1572 | /* Does C style string escaping. */ | |
1573 | ||
1574 | if (!(r = new(char, strlen(s)*4 + 1))) | |
1575 | return NULL; | |
1576 | ||
1577 | for (f = s, t = r; *f; f++) | |
1578 | ||
1579 | switch (*f) { | |
1580 | ||
1581 | case '\a': | |
1582 | *(t++) = '\\'; | |
1583 | *(t++) = 'a'; | |
1584 | break; | |
1585 | case '\b': | |
1586 | *(t++) = '\\'; | |
1587 | *(t++) = 'b'; | |
1588 | break; | |
1589 | case '\f': | |
1590 | *(t++) = '\\'; | |
1591 | *(t++) = 'f'; | |
1592 | break; | |
1593 | case '\n': | |
1594 | *(t++) = '\\'; | |
1595 | *(t++) = 'n'; | |
1596 | break; | |
1597 | case '\r': | |
1598 | *(t++) = '\\'; | |
1599 | *(t++) = 'r'; | |
1600 | break; | |
1601 | case '\t': | |
1602 | *(t++) = '\\'; | |
1603 | *(t++) = 't'; | |
1604 | break; | |
1605 | case '\v': | |
1606 | *(t++) = '\\'; | |
1607 | *(t++) = 'v'; | |
1608 | break; | |
1609 | case '\\': | |
1610 | *(t++) = '\\'; | |
1611 | *(t++) = '\\'; | |
1612 | break; | |
1613 | case '"': | |
1614 | *(t++) = '\\'; | |
1615 | *(t++) = '"'; | |
1616 | break; | |
1617 | case '\'': | |
1618 | *(t++) = '\\'; | |
1619 | *(t++) = '\''; | |
1620 | break; | |
1621 | ||
1622 | default: | |
1623 | /* For special chars we prefer octal over | |
1624 | * hexadecimal encoding, simply because glib's | |
1625 | * g_strescape() does the same */ | |
1626 | if ((*f < ' ') || (*f >= 127)) { | |
1627 | *(t++) = '\\'; | |
1628 | *(t++) = octchar((unsigned char) *f >> 6); | |
1629 | *(t++) = octchar((unsigned char) *f >> 3); | |
1630 | *(t++) = octchar((unsigned char) *f); | |
1631 | } else | |
1632 | *(t++) = *f; | |
1633 | break; | |
1634 | } | |
1635 | ||
1636 | *t = 0; | |
1637 | ||
1638 | return r; | |
1639 | } | |
1640 | ||
6febfd0d | 1641 | char *cunescape_length(const char *s, size_t length) { |
4fe88d28 LP |
1642 | char *r, *t; |
1643 | const char *f; | |
1644 | ||
1645 | assert(s); | |
1646 | ||
1647 | /* Undoes C style string escaping */ | |
1648 | ||
6febfd0d | 1649 | if (!(r = new(char, length+1))) |
4fe88d28 LP |
1650 | return r; |
1651 | ||
6febfd0d | 1652 | for (f = s, t = r; f < s + length; f++) { |
4fe88d28 LP |
1653 | |
1654 | if (*f != '\\') { | |
1655 | *(t++) = *f; | |
1656 | continue; | |
1657 | } | |
1658 | ||
1659 | f++; | |
1660 | ||
1661 | switch (*f) { | |
1662 | ||
1663 | case 'a': | |
1664 | *(t++) = '\a'; | |
1665 | break; | |
1666 | case 'b': | |
1667 | *(t++) = '\b'; | |
1668 | break; | |
1669 | case 'f': | |
1670 | *(t++) = '\f'; | |
1671 | break; | |
1672 | case 'n': | |
1673 | *(t++) = '\n'; | |
1674 | break; | |
1675 | case 'r': | |
1676 | *(t++) = '\r'; | |
1677 | break; | |
1678 | case 't': | |
1679 | *(t++) = '\t'; | |
1680 | break; | |
1681 | case 'v': | |
1682 | *(t++) = '\v'; | |
1683 | break; | |
1684 | case '\\': | |
1685 | *(t++) = '\\'; | |
1686 | break; | |
1687 | case '"': | |
1688 | *(t++) = '"'; | |
1689 | break; | |
1690 | case '\'': | |
1691 | *(t++) = '\''; | |
1692 | break; | |
1693 | ||
e167fb86 LP |
1694 | case 's': |
1695 | /* This is an extension of the XDG syntax files */ | |
1696 | *(t++) = ' '; | |
1697 | break; | |
1698 | ||
4fe88d28 LP |
1699 | case 'x': { |
1700 | /* hexadecimal encoding */ | |
1701 | int a, b; | |
1702 | ||
1703 | if ((a = unhexchar(f[1])) < 0 || | |
1704 | (b = unhexchar(f[2])) < 0) { | |
1705 | /* Invalid escape code, let's take it literal then */ | |
1706 | *(t++) = '\\'; | |
1707 | *(t++) = 'x'; | |
1708 | } else { | |
1709 | *(t++) = (char) ((a << 4) | b); | |
1710 | f += 2; | |
1711 | } | |
1712 | ||
1713 | break; | |
1714 | } | |
1715 | ||
1716 | case '0': | |
1717 | case '1': | |
1718 | case '2': | |
1719 | case '3': | |
1720 | case '4': | |
1721 | case '5': | |
1722 | case '6': | |
1723 | case '7': { | |
1724 | /* octal encoding */ | |
1725 | int a, b, c; | |
1726 | ||
1727 | if ((a = unoctchar(f[0])) < 0 || | |
1728 | (b = unoctchar(f[1])) < 0 || | |
1729 | (c = unoctchar(f[2])) < 0) { | |
1730 | /* Invalid escape code, let's take it literal then */ | |
1731 | *(t++) = '\\'; | |
1732 | *(t++) = f[0]; | |
1733 | } else { | |
1734 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1735 | f += 2; | |
1736 | } | |
1737 | ||
1738 | break; | |
1739 | } | |
1740 | ||
1741 | case 0: | |
1742 | /* premature end of string.*/ | |
1743 | *(t++) = '\\'; | |
1744 | goto finish; | |
1745 | ||
1746 | default: | |
1747 | /* Invalid escape code, let's take it literal then */ | |
1748 | *(t++) = '\\'; | |
f3d4cc01 | 1749 | *(t++) = *f; |
4fe88d28 LP |
1750 | break; |
1751 | } | |
1752 | } | |
1753 | ||
1754 | finish: | |
1755 | *t = 0; | |
1756 | return r; | |
1757 | } | |
1758 | ||
6febfd0d LP |
1759 | char *cunescape(const char *s) { |
1760 | return cunescape_length(s, strlen(s)); | |
1761 | } | |
4fe88d28 LP |
1762 | |
1763 | char *xescape(const char *s, const char *bad) { | |
1764 | char *r, *t; | |
1765 | const char *f; | |
1766 | ||
1767 | /* Escapes all chars in bad, in addition to \ and all special | |
1768 | * chars, in \xFF style escaping. May be reversed with | |
1769 | * cunescape. */ | |
1770 | ||
1771 | if (!(r = new(char, strlen(s)*4+1))) | |
1772 | return NULL; | |
1773 | ||
1774 | for (f = s, t = r; *f; f++) { | |
1775 | ||
b866264a LP |
1776 | if ((*f < ' ') || (*f >= 127) || |
1777 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1778 | *(t++) = '\\'; |
1779 | *(t++) = 'x'; | |
1780 | *(t++) = hexchar(*f >> 4); | |
1781 | *(t++) = hexchar(*f); | |
1782 | } else | |
1783 | *(t++) = *f; | |
1784 | } | |
1785 | ||
1786 | *t = 0; | |
1787 | ||
1788 | return r; | |
1789 | } | |
1790 | ||
ea430986 | 1791 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1792 | char *r, *t; |
1793 | const char *f; | |
1794 | ||
47be870b LP |
1795 | assert(s); |
1796 | ||
ea430986 LP |
1797 | /* Escapes all chars that D-Bus' object path cannot deal |
1798 | * with. Can be reverse with bus_path_unescape() */ | |
1799 | ||
1800 | if (!(r = new(char, strlen(s)*3+1))) | |
1801 | return NULL; | |
1802 | ||
1803 | for (f = s, t = r; *f; f++) { | |
1804 | ||
1805 | if (!(*f >= 'A' && *f <= 'Z') && | |
1806 | !(*f >= 'a' && *f <= 'z') && | |
1807 | !(*f >= '0' && *f <= '9')) { | |
1808 | *(t++) = '_'; | |
1809 | *(t++) = hexchar(*f >> 4); | |
1810 | *(t++) = hexchar(*f); | |
1811 | } else | |
1812 | *(t++) = *f; | |
1813 | } | |
1814 | ||
1815 | *t = 0; | |
1816 | ||
1817 | return r; | |
1818 | } | |
1819 | ||
9e2f7c11 | 1820 | char *bus_path_unescape(const char *f) { |
ea430986 | 1821 | char *r, *t; |
ea430986 | 1822 | |
9e2f7c11 | 1823 | assert(f); |
47be870b | 1824 | |
9e2f7c11 | 1825 | if (!(r = strdup(f))) |
ea430986 LP |
1826 | return NULL; |
1827 | ||
9e2f7c11 | 1828 | for (t = r; *f; f++) { |
ea430986 LP |
1829 | |
1830 | if (*f == '_') { | |
1831 | int a, b; | |
1832 | ||
1833 | if ((a = unhexchar(f[1])) < 0 || | |
1834 | (b = unhexchar(f[2])) < 0) { | |
1835 | /* Invalid escape code, let's take it literal then */ | |
1836 | *(t++) = '_'; | |
1837 | } else { | |
1838 | *(t++) = (char) ((a << 4) | b); | |
1839 | f += 2; | |
1840 | } | |
1841 | } else | |
1842 | *(t++) = *f; | |
1843 | } | |
1844 | ||
1845 | *t = 0; | |
1846 | ||
1847 | return r; | |
1848 | } | |
1849 | ||
4fe88d28 LP |
1850 | char *path_kill_slashes(char *path) { |
1851 | char *f, *t; | |
1852 | bool slash = false; | |
1853 | ||
1854 | /* Removes redundant inner and trailing slashes. Modifies the | |
1855 | * passed string in-place. | |
1856 | * | |
1857 | * ///foo///bar/ becomes /foo/bar | |
1858 | */ | |
1859 | ||
1860 | for (f = path, t = path; *f; f++) { | |
1861 | ||
1862 | if (*f == '/') { | |
1863 | slash = true; | |
1864 | continue; | |
1865 | } | |
1866 | ||
1867 | if (slash) { | |
1868 | slash = false; | |
1869 | *(t++) = '/'; | |
1870 | } | |
1871 | ||
1872 | *(t++) = *f; | |
1873 | } | |
1874 | ||
1875 | /* Special rule, if we are talking of the root directory, a | |
1876 | trailing slash is good */ | |
1877 | ||
1878 | if (t == path && slash) | |
1879 | *(t++) = '/'; | |
1880 | ||
1881 | *t = 0; | |
1882 | return path; | |
1883 | } | |
1884 | ||
1885 | bool path_startswith(const char *path, const char *prefix) { | |
1886 | assert(path); | |
1887 | assert(prefix); | |
1888 | ||
1889 | if ((path[0] == '/') != (prefix[0] == '/')) | |
1890 | return false; | |
1891 | ||
1892 | for (;;) { | |
1893 | size_t a, b; | |
1894 | ||
1895 | path += strspn(path, "/"); | |
1896 | prefix += strspn(prefix, "/"); | |
1897 | ||
1898 | if (*prefix == 0) | |
1899 | return true; | |
1900 | ||
1901 | if (*path == 0) | |
1902 | return false; | |
1903 | ||
1904 | a = strcspn(path, "/"); | |
1905 | b = strcspn(prefix, "/"); | |
1906 | ||
1907 | if (a != b) | |
1908 | return false; | |
1909 | ||
1910 | if (memcmp(path, prefix, a) != 0) | |
1911 | return false; | |
1912 | ||
1913 | path += a; | |
1914 | prefix += b; | |
1915 | } | |
1916 | } | |
1917 | ||
15ae422b LP |
1918 | bool path_equal(const char *a, const char *b) { |
1919 | assert(a); | |
1920 | assert(b); | |
1921 | ||
1922 | if ((a[0] == '/') != (b[0] == '/')) | |
1923 | return false; | |
1924 | ||
1925 | for (;;) { | |
1926 | size_t j, k; | |
1927 | ||
1928 | a += strspn(a, "/"); | |
1929 | b += strspn(b, "/"); | |
1930 | ||
1931 | if (*a == 0 && *b == 0) | |
1932 | return true; | |
1933 | ||
1934 | if (*a == 0 || *b == 0) | |
1935 | return false; | |
1936 | ||
1937 | j = strcspn(a, "/"); | |
1938 | k = strcspn(b, "/"); | |
1939 | ||
1940 | if (j != k) | |
1941 | return false; | |
1942 | ||
1943 | if (memcmp(a, b, j) != 0) | |
1944 | return false; | |
1945 | ||
1946 | a += j; | |
1947 | b += k; | |
1948 | } | |
1949 | } | |
1950 | ||
67d51650 | 1951 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1952 | char *p; |
1953 | ||
67d51650 | 1954 | assert(t); |
4fe88d28 | 1955 | |
67d51650 | 1956 | for (p = t; *p; p++) |
4fe88d28 LP |
1957 | if (*p >= 'A' && *p <= 'Z') |
1958 | *p = *p - 'A' + 'a'; | |
1959 | ||
67d51650 | 1960 | return t; |
4fe88d28 | 1961 | } |
1dccbe19 | 1962 | |
c85dc17b LP |
1963 | bool ignore_file(const char *filename) { |
1964 | assert(filename); | |
1965 | ||
1966 | return | |
1967 | filename[0] == '.' || | |
6c78be3c | 1968 | streq(filename, "lost+found") || |
e472d476 LP |
1969 | streq(filename, "aquota.user") || |
1970 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1971 | endswith(filename, "~") || |
1972 | endswith(filename, ".rpmnew") || | |
1973 | endswith(filename, ".rpmsave") || | |
1974 | endswith(filename, ".rpmorig") || | |
1975 | endswith(filename, ".dpkg-old") || | |
1976 | endswith(filename, ".dpkg-new") || | |
1977 | endswith(filename, ".swp"); | |
1978 | } | |
1979 | ||
3a0ecb08 LP |
1980 | int fd_nonblock(int fd, bool nonblock) { |
1981 | int flags; | |
1982 | ||
1983 | assert(fd >= 0); | |
1984 | ||
1985 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1986 | return -errno; | |
1987 | ||
1988 | if (nonblock) | |
1989 | flags |= O_NONBLOCK; | |
1990 | else | |
1991 | flags &= ~O_NONBLOCK; | |
1992 | ||
1993 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1994 | return -errno; | |
1995 | ||
1996 | return 0; | |
1997 | } | |
1998 | ||
1999 | int fd_cloexec(int fd, bool cloexec) { | |
2000 | int flags; | |
2001 | ||
2002 | assert(fd >= 0); | |
2003 | ||
2004 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
2005 | return -errno; | |
2006 | ||
2007 | if (cloexec) | |
2008 | flags |= FD_CLOEXEC; | |
2009 | else | |
2010 | flags &= ~FD_CLOEXEC; | |
2011 | ||
2012 | if (fcntl(fd, F_SETFD, flags) < 0) | |
2013 | return -errno; | |
2014 | ||
2015 | return 0; | |
2016 | } | |
2017 | ||
a0d40ac5 LP |
2018 | int close_all_fds(const int except[], unsigned n_except) { |
2019 | DIR *d; | |
2020 | struct dirent *de; | |
2021 | int r = 0; | |
2022 | ||
2023 | if (!(d = opendir("/proc/self/fd"))) | |
2024 | return -errno; | |
2025 | ||
2026 | while ((de = readdir(d))) { | |
a7610064 | 2027 | int fd = -1; |
a0d40ac5 | 2028 | |
a16e1123 | 2029 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
2030 | continue; |
2031 | ||
720ce21d LP |
2032 | if (safe_atoi(de->d_name, &fd) < 0) |
2033 | /* Let's better ignore this, just in case */ | |
2034 | continue; | |
a0d40ac5 LP |
2035 | |
2036 | if (fd < 3) | |
2037 | continue; | |
2038 | ||
2039 | if (fd == dirfd(d)) | |
2040 | continue; | |
2041 | ||
2042 | if (except) { | |
2043 | bool found; | |
2044 | unsigned i; | |
2045 | ||
2046 | found = false; | |
2047 | for (i = 0; i < n_except; i++) | |
2048 | if (except[i] == fd) { | |
2049 | found = true; | |
2050 | break; | |
2051 | } | |
2052 | ||
2053 | if (found) | |
2054 | continue; | |
2055 | } | |
2056 | ||
720ce21d | 2057 | if (close_nointr(fd) < 0) { |
2f357920 | 2058 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
2059 | if (errno != EBADF && r == 0) |
2060 | r = -errno; | |
2f357920 | 2061 | } |
a0d40ac5 LP |
2062 | } |
2063 | ||
a0d40ac5 LP |
2064 | closedir(d); |
2065 | return r; | |
2066 | } | |
2067 | ||
db12775d LP |
2068 | bool chars_intersect(const char *a, const char *b) { |
2069 | const char *p; | |
2070 | ||
2071 | /* Returns true if any of the chars in a are in b. */ | |
2072 | for (p = a; *p; p++) | |
2073 | if (strchr(b, *p)) | |
2074 | return true; | |
2075 | ||
2076 | return false; | |
2077 | } | |
2078 | ||
8b6c7120 LP |
2079 | char *format_timestamp(char *buf, size_t l, usec_t t) { |
2080 | struct tm tm; | |
2081 | time_t sec; | |
2082 | ||
2083 | assert(buf); | |
2084 | assert(l > 0); | |
2085 | ||
2086 | if (t <= 0) | |
2087 | return NULL; | |
2088 | ||
f872ec33 | 2089 | sec = (time_t) (t / USEC_PER_SEC); |
8b6c7120 LP |
2090 | |
2091 | if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0) | |
2092 | return NULL; | |
2093 | ||
2094 | return buf; | |
2095 | } | |
2096 | ||
584be568 LP |
2097 | char *format_timestamp_pretty(char *buf, size_t l, usec_t t) { |
2098 | usec_t n, d; | |
2099 | ||
2100 | n = now(CLOCK_REALTIME); | |
2101 | ||
2102 | if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) | |
2103 | return NULL; | |
2104 | ||
2105 | d = n - t; | |
2106 | ||
2107 | if (d >= USEC_PER_YEAR) | |
2108 | snprintf(buf, l, "%llu years and %llu months ago", | |
2109 | (unsigned long long) (d / USEC_PER_YEAR), | |
2110 | (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); | |
2111 | else if (d >= USEC_PER_MONTH) | |
2112 | snprintf(buf, l, "%llu months and %llu days ago", | |
2113 | (unsigned long long) (d / USEC_PER_MONTH), | |
2114 | (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); | |
2115 | else if (d >= USEC_PER_WEEK) | |
2116 | snprintf(buf, l, "%llu weeks and %llu days ago", | |
2117 | (unsigned long long) (d / USEC_PER_WEEK), | |
2118 | (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); | |
2119 | else if (d >= 2*USEC_PER_DAY) | |
2120 | snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); | |
2121 | else if (d >= 25*USEC_PER_HOUR) | |
2122 | snprintf(buf, l, "1 day and %lluh ago", | |
2123 | (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); | |
2124 | else if (d >= 6*USEC_PER_HOUR) | |
2125 | snprintf(buf, l, "%lluh ago", | |
2126 | (unsigned long long) (d / USEC_PER_HOUR)); | |
2127 | else if (d >= USEC_PER_HOUR) | |
2128 | snprintf(buf, l, "%lluh %llumin ago", | |
2129 | (unsigned long long) (d / USEC_PER_HOUR), | |
2130 | (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); | |
2131 | else if (d >= 5*USEC_PER_MINUTE) | |
2132 | snprintf(buf, l, "%llumin ago", | |
2133 | (unsigned long long) (d / USEC_PER_MINUTE)); | |
2134 | else if (d >= USEC_PER_MINUTE) | |
2135 | snprintf(buf, l, "%llumin %llus ago", | |
2136 | (unsigned long long) (d / USEC_PER_MINUTE), | |
2137 | (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); | |
2138 | else if (d >= USEC_PER_SEC) | |
2139 | snprintf(buf, l, "%llus ago", | |
2140 | (unsigned long long) (d / USEC_PER_SEC)); | |
2141 | else if (d >= USEC_PER_MSEC) | |
2142 | snprintf(buf, l, "%llums ago", | |
2143 | (unsigned long long) (d / USEC_PER_MSEC)); | |
2144 | else if (d > 0) | |
2145 | snprintf(buf, l, "%lluus ago", | |
2146 | (unsigned long long) d); | |
2147 | else | |
2148 | snprintf(buf, l, "now"); | |
2149 | ||
2150 | buf[l-1] = 0; | |
2151 | return buf; | |
2152 | } | |
2153 | ||
871d7de4 LP |
2154 | char *format_timespan(char *buf, size_t l, usec_t t) { |
2155 | static const struct { | |
2156 | const char *suffix; | |
2157 | usec_t usec; | |
2158 | } table[] = { | |
2159 | { "w", USEC_PER_WEEK }, | |
2160 | { "d", USEC_PER_DAY }, | |
2161 | { "h", USEC_PER_HOUR }, | |
2162 | { "min", USEC_PER_MINUTE }, | |
2163 | { "s", USEC_PER_SEC }, | |
2164 | { "ms", USEC_PER_MSEC }, | |
2165 | { "us", 1 }, | |
2166 | }; | |
2167 | ||
2168 | unsigned i; | |
2169 | char *p = buf; | |
2170 | ||
2171 | assert(buf); | |
2172 | assert(l > 0); | |
2173 | ||
2174 | if (t == (usec_t) -1) | |
2175 | return NULL; | |
2176 | ||
4502d22c LP |
2177 | if (t == 0) { |
2178 | snprintf(p, l, "0"); | |
2179 | p[l-1] = 0; | |
2180 | return p; | |
2181 | } | |
2182 | ||
871d7de4 LP |
2183 | /* The result of this function can be parsed with parse_usec */ |
2184 | ||
2185 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
2186 | int k; | |
2187 | size_t n; | |
2188 | ||
2189 | if (t < table[i].usec) | |
2190 | continue; | |
2191 | ||
2192 | if (l <= 1) | |
2193 | break; | |
2194 | ||
2195 | k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix); | |
2196 | n = MIN((size_t) k, l); | |
2197 | ||
2198 | l -= n; | |
2199 | p += n; | |
2200 | ||
2201 | t %= table[i].usec; | |
2202 | } | |
2203 | ||
2204 | *p = 0; | |
2205 | ||
2206 | return buf; | |
2207 | } | |
2208 | ||
42856c10 LP |
2209 | bool fstype_is_network(const char *fstype) { |
2210 | static const char * const table[] = { | |
2211 | "cifs", | |
2212 | "smbfs", | |
2213 | "ncpfs", | |
2214 | "nfs", | |
ca139f94 LP |
2215 | "nfs4", |
2216 | "gfs", | |
2217 | "gfs2" | |
42856c10 LP |
2218 | }; |
2219 | ||
2220 | unsigned i; | |
2221 | ||
2222 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2223 | if (streq(table[i], fstype)) | |
2224 | return true; | |
2225 | ||
2226 | return false; | |
2227 | } | |
2228 | ||
601f6a1e LP |
2229 | int chvt(int vt) { |
2230 | int fd, r = 0; | |
2231 | ||
74bc3bdc | 2232 | if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) |
601f6a1e LP |
2233 | return -errno; |
2234 | ||
2235 | if (vt < 0) { | |
2236 | int tiocl[2] = { | |
2237 | TIOCL_GETKMSGREDIRECT, | |
2238 | 0 | |
2239 | }; | |
2240 | ||
2241 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) | |
2242 | return -errno; | |
2243 | ||
2244 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
2245 | } | |
2246 | ||
2247 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
2248 | r = -errno; | |
2249 | ||
a16e1123 | 2250 | close_nointr_nofail(r); |
601f6a1e LP |
2251 | return r; |
2252 | } | |
2253 | ||
80876c20 LP |
2254 | int read_one_char(FILE *f, char *ret, bool *need_nl) { |
2255 | struct termios old_termios, new_termios; | |
2256 | char c; | |
20c03b7b | 2257 | char line[LINE_MAX]; |
80876c20 LP |
2258 | |
2259 | assert(f); | |
2260 | assert(ret); | |
2261 | ||
2262 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
2263 | new_termios = old_termios; | |
2264 | ||
2265 | new_termios.c_lflag &= ~ICANON; | |
2266 | new_termios.c_cc[VMIN] = 1; | |
2267 | new_termios.c_cc[VTIME] = 0; | |
2268 | ||
2269 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
2270 | size_t k; | |
2271 | ||
2272 | k = fread(&c, 1, 1, f); | |
2273 | ||
2274 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2275 | ||
2276 | if (k <= 0) | |
2277 | return -EIO; | |
2278 | ||
2279 | if (need_nl) | |
2280 | *need_nl = c != '\n'; | |
2281 | ||
2282 | *ret = c; | |
2283 | return 0; | |
2284 | } | |
2285 | } | |
2286 | ||
2287 | if (!(fgets(line, sizeof(line), f))) | |
2288 | return -EIO; | |
2289 | ||
2290 | truncate_nl(line); | |
2291 | ||
2292 | if (strlen(line) != 1) | |
2293 | return -EBADMSG; | |
2294 | ||
2295 | if (need_nl) | |
2296 | *need_nl = false; | |
2297 | ||
2298 | *ret = line[0]; | |
2299 | return 0; | |
2300 | } | |
2301 | ||
2302 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 LP |
2303 | bool on_tty; |
2304 | ||
80876c20 LP |
2305 | assert(ret); |
2306 | assert(replies); | |
2307 | assert(text); | |
2308 | ||
1b39d4b9 LP |
2309 | on_tty = isatty(STDOUT_FILENO); |
2310 | ||
80876c20 LP |
2311 | for (;;) { |
2312 | va_list ap; | |
2313 | char c; | |
2314 | int r; | |
2315 | bool need_nl = true; | |
2316 | ||
1b39d4b9 LP |
2317 | if (on_tty) |
2318 | fputs("\x1B[1m", stdout); | |
b1b2dc0c | 2319 | |
80876c20 LP |
2320 | va_start(ap, text); |
2321 | vprintf(text, ap); | |
2322 | va_end(ap); | |
2323 | ||
1b39d4b9 LP |
2324 | if (on_tty) |
2325 | fputs("\x1B[0m", stdout); | |
b1b2dc0c | 2326 | |
80876c20 LP |
2327 | fflush(stdout); |
2328 | ||
2329 | if ((r = read_one_char(stdin, &c, &need_nl)) < 0) { | |
2330 | ||
2331 | if (r == -EBADMSG) { | |
2332 | puts("Bad input, please try again."); | |
2333 | continue; | |
2334 | } | |
2335 | ||
2336 | putchar('\n'); | |
2337 | return r; | |
2338 | } | |
2339 | ||
2340 | if (need_nl) | |
2341 | putchar('\n'); | |
2342 | ||
2343 | if (strchr(replies, c)) { | |
2344 | *ret = c; | |
2345 | return 0; | |
2346 | } | |
2347 | ||
2348 | puts("Read unexpected character, please try again."); | |
2349 | } | |
2350 | } | |
2351 | ||
6ea832a2 | 2352 | int reset_terminal_fd(int fd) { |
80876c20 LP |
2353 | struct termios termios; |
2354 | int r = 0; | |
3fe5e5d4 LP |
2355 | long arg; |
2356 | ||
2357 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
2358 | |
2359 | assert(fd >= 0); | |
2360 | ||
eed1d0e3 LP |
2361 | /* We leave locked terminal attributes untouched, so that |
2362 | * Plymouth may set whatever it wants to set, and we don't | |
2363 | * interfere with that. */ | |
3fe5e5d4 LP |
2364 | |
2365 | /* Disable exclusive mode, just in case */ | |
2366 | ioctl(fd, TIOCNXCL); | |
2367 | ||
2368 | /* Enable console unicode mode */ | |
2369 | arg = K_UNICODE; | |
2370 | ioctl(fd, KDSKBMODE, &arg); | |
80876c20 LP |
2371 | |
2372 | if (tcgetattr(fd, &termios) < 0) { | |
2373 | r = -errno; | |
2374 | goto finish; | |
2375 | } | |
2376 | ||
aaf694ca LP |
2377 | /* We only reset the stuff that matters to the software. How |
2378 | * hardware is set up we don't touch assuming that somebody | |
2379 | * else will do that for us */ | |
2380 | ||
2381 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
2382 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
2383 | termios.c_oflag |= ONLCR; | |
2384 | termios.c_cflag |= CREAD; | |
2385 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
2386 | ||
2387 | termios.c_cc[VINTR] = 03; /* ^C */ | |
2388 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
2389 | termios.c_cc[VERASE] = 0177; | |
2390 | termios.c_cc[VKILL] = 025; /* ^X */ | |
2391 | termios.c_cc[VEOF] = 04; /* ^D */ | |
2392 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
2393 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
2394 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
2395 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
2396 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
2397 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
2398 | termios.c_cc[VEOL] = 0; |
2399 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
2400 | |
2401 | termios.c_cc[VTIME] = 0; | |
2402 | termios.c_cc[VMIN] = 1; | |
2403 | ||
2404 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
2405 | r = -errno; | |
2406 | ||
2407 | finish: | |
2408 | /* Just in case, flush all crap out */ | |
2409 | tcflush(fd, TCIOFLUSH); | |
2410 | ||
2411 | return r; | |
2412 | } | |
2413 | ||
6ea832a2 LP |
2414 | int reset_terminal(const char *name) { |
2415 | int fd, r; | |
2416 | ||
2417 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
2418 | if (fd < 0) | |
2419 | return fd; | |
2420 | ||
2421 | r = reset_terminal_fd(fd); | |
2422 | close_nointr_nofail(fd); | |
2423 | ||
2424 | return r; | |
2425 | } | |
2426 | ||
80876c20 LP |
2427 | int open_terminal(const char *name, int mode) { |
2428 | int fd, r; | |
f73f76ac | 2429 | unsigned c = 0; |
80876c20 | 2430 | |
f73f76ac LP |
2431 | /* |
2432 | * If a TTY is in the process of being closed opening it might | |
2433 | * cause EIO. This is horribly awful, but unlikely to be | |
2434 | * changed in the kernel. Hence we work around this problem by | |
2435 | * retrying a couple of times. | |
2436 | * | |
2437 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
2438 | */ | |
2439 | ||
2440 | for (;;) { | |
2441 | if ((fd = open(name, mode)) >= 0) | |
2442 | break; | |
2443 | ||
2444 | if (errno != EIO) | |
2445 | return -errno; | |
2446 | ||
2447 | if (c >= 20) | |
2448 | return -errno; | |
2449 | ||
2450 | usleep(50 * USEC_PER_MSEC); | |
2451 | c++; | |
2452 | } | |
2453 | ||
2454 | if (fd < 0) | |
80876c20 LP |
2455 | return -errno; |
2456 | ||
2457 | if ((r = isatty(fd)) < 0) { | |
2458 | close_nointr_nofail(fd); | |
2459 | return -errno; | |
2460 | } | |
2461 | ||
2462 | if (!r) { | |
2463 | close_nointr_nofail(fd); | |
2464 | return -ENOTTY; | |
2465 | } | |
2466 | ||
2467 | return fd; | |
2468 | } | |
2469 | ||
2470 | int flush_fd(int fd) { | |
2471 | struct pollfd pollfd; | |
2472 | ||
2473 | zero(pollfd); | |
2474 | pollfd.fd = fd; | |
2475 | pollfd.events = POLLIN; | |
2476 | ||
2477 | for (;;) { | |
20c03b7b | 2478 | char buf[LINE_MAX]; |
80876c20 LP |
2479 | ssize_t l; |
2480 | int r; | |
2481 | ||
2482 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2483 | ||
2484 | if (errno == EINTR) | |
2485 | continue; | |
2486 | ||
2487 | return -errno; | |
2488 | } | |
2489 | ||
2490 | if (r == 0) | |
2491 | return 0; | |
2492 | ||
2493 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2494 | ||
2495 | if (errno == EINTR) | |
2496 | continue; | |
2497 | ||
2498 | if (errno == EAGAIN) | |
2499 | return 0; | |
2500 | ||
2501 | return -errno; | |
2502 | } | |
2503 | ||
2504 | if (l <= 0) | |
2505 | return 0; | |
2506 | } | |
2507 | } | |
2508 | ||
21de3988 | 2509 | int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm) { |
bab45044 | 2510 | int fd = -1, notify = -1, r, wd = -1; |
80876c20 LP |
2511 | |
2512 | assert(name); | |
2513 | ||
2514 | /* We use inotify to be notified when the tty is closed. We | |
2515 | * create the watch before checking if we can actually acquire | |
2516 | * it, so that we don't lose any event. | |
2517 | * | |
2518 | * Note: strictly speaking this actually watches for the | |
2519 | * device being closed, it does *not* really watch whether a | |
2520 | * tty loses its controlling process. However, unless some | |
2521 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2522 | * its tty otherwise this will not become a problem. As long | |
2523 | * as the administrator makes sure not configure any service | |
2524 | * on the same tty as an untrusted user this should not be a | |
2525 | * problem. (Which he probably should not do anyway.) */ | |
2526 | ||
2527 | if (!fail && !force) { | |
2528 | if ((notify = inotify_init1(IN_CLOEXEC)) < 0) { | |
2529 | r = -errno; | |
2530 | goto fail; | |
2531 | } | |
2532 | ||
2533 | if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) { | |
2534 | r = -errno; | |
2535 | goto fail; | |
2536 | } | |
2537 | } | |
2538 | ||
2539 | for (;;) { | |
e3d1855b LP |
2540 | if (notify >= 0) |
2541 | if ((r = flush_fd(notify)) < 0) | |
2542 | goto fail; | |
80876c20 LP |
2543 | |
2544 | /* We pass here O_NOCTTY only so that we can check the return | |
2545 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2546 | * successfully became the controlling process of the tty */ | |
6ea832a2 LP |
2547 | if ((fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) |
2548 | return fd; | |
80876c20 LP |
2549 | |
2550 | /* First, try to get the tty */ | |
21de3988 LP |
2551 | r = ioctl(fd, TIOCSCTTY, force); |
2552 | ||
2553 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2554 | * returning EPERM, i.e. when very likely we already | |
2555 | * are have this controlling terminal. */ | |
2556 | if (r < 0 && errno == EPERM && ignore_tiocstty_eperm) | |
2557 | r = 0; | |
2558 | ||
2559 | if (r < 0 && (force || fail || errno != EPERM)) { | |
80876c20 LP |
2560 | r = -errno; |
2561 | goto fail; | |
2562 | } | |
2563 | ||
2564 | if (r >= 0) | |
2565 | break; | |
2566 | ||
2567 | assert(!fail); | |
2568 | assert(!force); | |
2569 | assert(notify >= 0); | |
2570 | ||
2571 | for (;;) { | |
f601daa7 | 2572 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 2573 | ssize_t l; |
f601daa7 | 2574 | struct inotify_event *e; |
80876c20 | 2575 | |
f601daa7 | 2576 | if ((l = read(notify, &inotify_buffer, sizeof(inotify_buffer))) < 0) { |
80876c20 | 2577 | |
f601daa7 LP |
2578 | if (errno == EINTR) |
2579 | continue; | |
2580 | ||
2581 | r = -errno; | |
2582 | goto fail; | |
2583 | } | |
2584 | ||
2585 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2586 | |
f601daa7 LP |
2587 | while (l > 0) { |
2588 | size_t step; | |
80876c20 | 2589 | |
f601daa7 | 2590 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2591 | r = -EIO; |
f601daa7 LP |
2592 | goto fail; |
2593 | } | |
80876c20 | 2594 | |
f601daa7 LP |
2595 | step = sizeof(struct inotify_event) + e->len; |
2596 | assert(step <= (size_t) l); | |
80876c20 | 2597 | |
f601daa7 LP |
2598 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2599 | l -= step; | |
80876c20 LP |
2600 | } |
2601 | ||
2602 | break; | |
2603 | } | |
2604 | ||
2605 | /* We close the tty fd here since if the old session | |
2606 | * ended our handle will be dead. It's important that | |
2607 | * we do this after sleeping, so that we don't enter | |
2608 | * an endless loop. */ | |
2609 | close_nointr_nofail(fd); | |
2610 | } | |
2611 | ||
2612 | if (notify >= 0) | |
a16e1123 | 2613 | close_nointr_nofail(notify); |
80876c20 | 2614 | |
6ea832a2 | 2615 | if ((r = reset_terminal_fd(fd)) < 0) |
80876c20 LP |
2616 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2617 | ||
2618 | return fd; | |
2619 | ||
2620 | fail: | |
2621 | if (fd >= 0) | |
a16e1123 | 2622 | close_nointr_nofail(fd); |
80876c20 LP |
2623 | |
2624 | if (notify >= 0) | |
a16e1123 | 2625 | close_nointr_nofail(notify); |
80876c20 LP |
2626 | |
2627 | return r; | |
2628 | } | |
2629 | ||
2630 | int release_terminal(void) { | |
2631 | int r = 0, fd; | |
57cd2192 | 2632 | struct sigaction sa_old, sa_new; |
80876c20 | 2633 | |
57cd2192 | 2634 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY)) < 0) |
80876c20 LP |
2635 | return -errno; |
2636 | ||
57cd2192 LP |
2637 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2638 | * by our own TIOCNOTTY */ | |
2639 | ||
2640 | zero(sa_new); | |
2641 | sa_new.sa_handler = SIG_IGN; | |
2642 | sa_new.sa_flags = SA_RESTART; | |
2643 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2644 | ||
80876c20 LP |
2645 | if (ioctl(fd, TIOCNOTTY) < 0) |
2646 | r = -errno; | |
2647 | ||
57cd2192 LP |
2648 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2649 | ||
80876c20 LP |
2650 | close_nointr_nofail(fd); |
2651 | return r; | |
2652 | } | |
2653 | ||
9a34ec5f LP |
2654 | int sigaction_many(const struct sigaction *sa, ...) { |
2655 | va_list ap; | |
2656 | int r = 0, sig; | |
2657 | ||
2658 | va_start(ap, sa); | |
2659 | while ((sig = va_arg(ap, int)) > 0) | |
2660 | if (sigaction(sig, sa, NULL) < 0) | |
2661 | r = -errno; | |
2662 | va_end(ap); | |
2663 | ||
2664 | return r; | |
2665 | } | |
2666 | ||
2667 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2668 | struct sigaction sa; |
9a34ec5f LP |
2669 | va_list ap; |
2670 | int r = 0; | |
a337c6fc LP |
2671 | |
2672 | zero(sa); | |
2673 | sa.sa_handler = SIG_IGN; | |
2674 | sa.sa_flags = SA_RESTART; | |
2675 | ||
9a34ec5f LP |
2676 | if (sigaction(sig, &sa, NULL) < 0) |
2677 | r = -errno; | |
2678 | ||
2679 | va_start(ap, sig); | |
2680 | while ((sig = va_arg(ap, int)) > 0) | |
2681 | if (sigaction(sig, &sa, NULL) < 0) | |
2682 | r = -errno; | |
2683 | va_end(ap); | |
2684 | ||
2685 | return r; | |
2686 | } | |
2687 | ||
2688 | int default_signals(int sig, ...) { | |
2689 | struct sigaction sa; | |
2690 | va_list ap; | |
2691 | int r = 0; | |
2692 | ||
2693 | zero(sa); | |
2694 | sa.sa_handler = SIG_DFL; | |
2695 | sa.sa_flags = SA_RESTART; | |
2696 | ||
2697 | if (sigaction(sig, &sa, NULL) < 0) | |
2698 | r = -errno; | |
2699 | ||
2700 | va_start(ap, sig); | |
2701 | while ((sig = va_arg(ap, int)) > 0) | |
2702 | if (sigaction(sig, &sa, NULL) < 0) | |
2703 | r = -errno; | |
2704 | va_end(ap); | |
2705 | ||
2706 | return r; | |
a337c6fc LP |
2707 | } |
2708 | ||
8d567588 LP |
2709 | int close_pipe(int p[]) { |
2710 | int a = 0, b = 0; | |
2711 | ||
2712 | assert(p); | |
2713 | ||
2714 | if (p[0] >= 0) { | |
2715 | a = close_nointr(p[0]); | |
2716 | p[0] = -1; | |
2717 | } | |
2718 | ||
2719 | if (p[1] >= 0) { | |
2720 | b = close_nointr(p[1]); | |
2721 | p[1] = -1; | |
2722 | } | |
2723 | ||
2724 | return a < 0 ? a : b; | |
2725 | } | |
2726 | ||
eb22ac37 | 2727 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2728 | uint8_t *p; |
2729 | ssize_t n = 0; | |
2730 | ||
2731 | assert(fd >= 0); | |
2732 | assert(buf); | |
2733 | ||
2734 | p = buf; | |
2735 | ||
2736 | while (nbytes > 0) { | |
2737 | ssize_t k; | |
2738 | ||
2739 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2740 | ||
eb22ac37 | 2741 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2742 | continue; |
2743 | ||
eb22ac37 | 2744 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2745 | struct pollfd pollfd; |
2746 | ||
2747 | zero(pollfd); | |
2748 | pollfd.fd = fd; | |
2749 | pollfd.events = POLLIN; | |
2750 | ||
2751 | if (poll(&pollfd, 1, -1) < 0) { | |
2752 | if (errno == EINTR) | |
2753 | continue; | |
2754 | ||
2755 | return n > 0 ? n : -errno; | |
2756 | } | |
2757 | ||
2758 | if (pollfd.revents != POLLIN) | |
2759 | return n > 0 ? n : -EIO; | |
2760 | ||
2761 | continue; | |
2762 | } | |
2763 | ||
2764 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2765 | } | |
2766 | ||
2767 | p += k; | |
2768 | nbytes -= k; | |
2769 | n += k; | |
2770 | } | |
2771 | ||
2772 | return n; | |
2773 | } | |
2774 | ||
eb22ac37 LP |
2775 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2776 | const uint8_t *p; | |
2777 | ssize_t n = 0; | |
2778 | ||
2779 | assert(fd >= 0); | |
2780 | assert(buf); | |
2781 | ||
2782 | p = buf; | |
2783 | ||
2784 | while (nbytes > 0) { | |
2785 | ssize_t k; | |
2786 | ||
2787 | if ((k = write(fd, p, nbytes)) <= 0) { | |
2788 | ||
2789 | if (k < 0 && errno == EINTR) | |
2790 | continue; | |
2791 | ||
2792 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2793 | struct pollfd pollfd; | |
2794 | ||
2795 | zero(pollfd); | |
2796 | pollfd.fd = fd; | |
2797 | pollfd.events = POLLOUT; | |
2798 | ||
2799 | if (poll(&pollfd, 1, -1) < 0) { | |
2800 | if (errno == EINTR) | |
2801 | continue; | |
2802 | ||
2803 | return n > 0 ? n : -errno; | |
2804 | } | |
2805 | ||
2806 | if (pollfd.revents != POLLOUT) | |
2807 | return n > 0 ? n : -EIO; | |
2808 | ||
2809 | continue; | |
2810 | } | |
2811 | ||
2812 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2813 | } | |
2814 | ||
2815 | p += k; | |
2816 | nbytes -= k; | |
2817 | n += k; | |
2818 | } | |
2819 | ||
2820 | return n; | |
2821 | } | |
2822 | ||
8d567588 LP |
2823 | int path_is_mount_point(const char *t) { |
2824 | struct stat a, b; | |
35d2e7ec LP |
2825 | char *parent; |
2826 | int r; | |
8d567588 LP |
2827 | |
2828 | if (lstat(t, &a) < 0) { | |
8d567588 LP |
2829 | if (errno == ENOENT) |
2830 | return 0; | |
2831 | ||
2832 | return -errno; | |
2833 | } | |
2834 | ||
35d2e7ec LP |
2835 | if ((r = parent_of_path(t, &parent)) < 0) |
2836 | return r; | |
8d567588 | 2837 | |
35d2e7ec LP |
2838 | r = lstat(parent, &b); |
2839 | free(parent); | |
8d567588 | 2840 | |
35d2e7ec LP |
2841 | if (r < 0) |
2842 | return -errno; | |
8d567588 LP |
2843 | |
2844 | return a.st_dev != b.st_dev; | |
2845 | } | |
2846 | ||
24a6e4a4 LP |
2847 | int parse_usec(const char *t, usec_t *usec) { |
2848 | static const struct { | |
2849 | const char *suffix; | |
2850 | usec_t usec; | |
2851 | } table[] = { | |
2852 | { "sec", USEC_PER_SEC }, | |
2853 | { "s", USEC_PER_SEC }, | |
2854 | { "min", USEC_PER_MINUTE }, | |
2855 | { "hr", USEC_PER_HOUR }, | |
2856 | { "h", USEC_PER_HOUR }, | |
2857 | { "d", USEC_PER_DAY }, | |
2858 | { "w", USEC_PER_WEEK }, | |
2859 | { "msec", USEC_PER_MSEC }, | |
2860 | { "ms", USEC_PER_MSEC }, | |
2861 | { "m", USEC_PER_MINUTE }, | |
2862 | { "usec", 1ULL }, | |
2863 | { "us", 1ULL }, | |
2864 | { "", USEC_PER_SEC }, | |
2865 | }; | |
2866 | ||
2867 | const char *p; | |
2868 | usec_t r = 0; | |
2869 | ||
2870 | assert(t); | |
2871 | assert(usec); | |
2872 | ||
2873 | p = t; | |
2874 | do { | |
2875 | long long l; | |
2876 | char *e; | |
2877 | unsigned i; | |
2878 | ||
2879 | errno = 0; | |
2880 | l = strtoll(p, &e, 10); | |
2881 | ||
2882 | if (errno != 0) | |
2883 | return -errno; | |
2884 | ||
2885 | if (l < 0) | |
2886 | return -ERANGE; | |
2887 | ||
2888 | if (e == p) | |
2889 | return -EINVAL; | |
2890 | ||
2891 | e += strspn(e, WHITESPACE); | |
2892 | ||
2893 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2894 | if (startswith(e, table[i].suffix)) { | |
2895 | r += (usec_t) l * table[i].usec; | |
2896 | p = e + strlen(table[i].suffix); | |
2897 | break; | |
2898 | } | |
2899 | ||
2900 | if (i >= ELEMENTSOF(table)) | |
2901 | return -EINVAL; | |
2902 | ||
2903 | } while (*p != 0); | |
2904 | ||
2905 | *usec = r; | |
2906 | ||
2907 | return 0; | |
2908 | } | |
2909 | ||
843d2643 LP |
2910 | int make_stdio(int fd) { |
2911 | int r, s, t; | |
2912 | ||
2913 | assert(fd >= 0); | |
2914 | ||
2915 | r = dup2(fd, STDIN_FILENO); | |
2916 | s = dup2(fd, STDOUT_FILENO); | |
2917 | t = dup2(fd, STDERR_FILENO); | |
2918 | ||
2919 | if (fd >= 3) | |
2920 | close_nointr_nofail(fd); | |
2921 | ||
2922 | if (r < 0 || s < 0 || t < 0) | |
2923 | return -errno; | |
2924 | ||
2925 | return 0; | |
2926 | } | |
2927 | ||
ade509ce LP |
2928 | int make_null_stdio(void) { |
2929 | int null_fd; | |
2930 | ||
2931 | if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) | |
2932 | return -errno; | |
2933 | ||
2934 | return make_stdio(null_fd); | |
2935 | } | |
2936 | ||
8407a5d0 LP |
2937 | bool is_device_path(const char *path) { |
2938 | ||
2939 | /* Returns true on paths that refer to a device, either in | |
2940 | * sysfs or in /dev */ | |
2941 | ||
2942 | return | |
2943 | path_startswith(path, "/dev/") || | |
2944 | path_startswith(path, "/sys/"); | |
2945 | } | |
2946 | ||
01f78473 LP |
2947 | int dir_is_empty(const char *path) { |
2948 | DIR *d; | |
2949 | int r; | |
2950 | struct dirent buf, *de; | |
2951 | ||
2952 | if (!(d = opendir(path))) | |
2953 | return -errno; | |
2954 | ||
2955 | for (;;) { | |
2956 | if ((r = readdir_r(d, &buf, &de)) > 0) { | |
2957 | r = -r; | |
2958 | break; | |
2959 | } | |
2960 | ||
2961 | if (!de) { | |
2962 | r = 1; | |
2963 | break; | |
2964 | } | |
2965 | ||
2966 | if (!ignore_file(de->d_name)) { | |
2967 | r = 0; | |
2968 | break; | |
2969 | } | |
2970 | } | |
2971 | ||
2972 | closedir(d); | |
2973 | return r; | |
2974 | } | |
2975 | ||
d3782d60 LP |
2976 | unsigned long long random_ull(void) { |
2977 | int fd; | |
2978 | uint64_t ull; | |
2979 | ssize_t r; | |
2980 | ||
2981 | if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0) | |
2982 | goto fallback; | |
2983 | ||
eb22ac37 | 2984 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
2985 | close_nointr_nofail(fd); |
2986 | ||
2987 | if (r != sizeof(ull)) | |
2988 | goto fallback; | |
2989 | ||
2990 | return ull; | |
2991 | ||
2992 | fallback: | |
2993 | return random() * RAND_MAX + random(); | |
2994 | } | |
2995 | ||
5b6319dc LP |
2996 | void rename_process(const char name[8]) { |
2997 | assert(name); | |
2998 | ||
2999 | prctl(PR_SET_NAME, name); | |
3000 | ||
3001 | /* This is a like a poor man's setproctitle(). The string | |
3002 | * passed should fit in 7 chars (i.e. the length of | |
3003 | * "systemd") */ | |
3004 | ||
3005 | if (program_invocation_name) | |
3006 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
3007 | } | |
3008 | ||
7d793605 LP |
3009 | void sigset_add_many(sigset_t *ss, ...) { |
3010 | va_list ap; | |
3011 | int sig; | |
3012 | ||
3013 | assert(ss); | |
3014 | ||
3015 | va_start(ap, ss); | |
3016 | while ((sig = va_arg(ap, int)) > 0) | |
3017 | assert_se(sigaddset(ss, sig) == 0); | |
3018 | va_end(ap); | |
3019 | } | |
3020 | ||
ef2f1067 LP |
3021 | char* gethostname_malloc(void) { |
3022 | struct utsname u; | |
3023 | ||
3024 | assert_se(uname(&u) >= 0); | |
3025 | ||
3026 | if (u.nodename[0]) | |
3027 | return strdup(u.nodename); | |
3028 | ||
3029 | return strdup(u.sysname); | |
3030 | } | |
3031 | ||
3032 | char* getlogname_malloc(void) { | |
3033 | uid_t uid; | |
3034 | long bufsize; | |
3035 | char *buf, *name; | |
3036 | struct passwd pwbuf, *pw = NULL; | |
3037 | struct stat st; | |
3038 | ||
3039 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
3040 | uid = st.st_uid; | |
3041 | else | |
3042 | uid = getuid(); | |
3043 | ||
3044 | /* Shortcut things to avoid NSS lookups */ | |
3045 | if (uid == 0) | |
3046 | return strdup("root"); | |
3047 | ||
3048 | if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0) | |
3049 | bufsize = 4096; | |
3050 | ||
3051 | if (!(buf = malloc(bufsize))) | |
3052 | return NULL; | |
3053 | ||
3054 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) { | |
3055 | name = strdup(pw->pw_name); | |
3056 | free(buf); | |
3057 | return name; | |
3058 | } | |
3059 | ||
3060 | free(buf); | |
3061 | ||
3062 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
3063 | return NULL; | |
3064 | ||
3065 | return name; | |
3066 | } | |
3067 | ||
fc116c6a LP |
3068 | int getttyname_malloc(int fd, char **r) { |
3069 | char path[PATH_MAX], *c; | |
618e02c7 | 3070 | int k; |
8c6db833 LP |
3071 | |
3072 | assert(r); | |
ef2f1067 | 3073 | |
fc116c6a | 3074 | if ((k = ttyname_r(fd, path, sizeof(path))) != 0) |
618e02c7 | 3075 | return -k; |
ef2f1067 LP |
3076 | |
3077 | char_array_0(path); | |
3078 | ||
fc116c6a | 3079 | if (!(c = strdup(startswith(path, "/dev/") ? path + 5 : path))) |
8c6db833 LP |
3080 | return -ENOMEM; |
3081 | ||
3082 | *r = c; | |
3083 | return 0; | |
3084 | } | |
3085 | ||
fc116c6a LP |
3086 | int getttyname_harder(int fd, char **r) { |
3087 | int k; | |
3088 | char *s; | |
3089 | ||
3090 | if ((k = getttyname_malloc(fd, &s)) < 0) | |
3091 | return k; | |
3092 | ||
3093 | if (streq(s, "tty")) { | |
3094 | free(s); | |
46824d0e | 3095 | return get_ctty(r, NULL); |
fc116c6a LP |
3096 | } |
3097 | ||
3098 | *r = s; | |
3099 | return 0; | |
3100 | } | |
3101 | ||
3102 | int get_ctty_devnr(dev_t *d) { | |
3103 | int k; | |
20c03b7b | 3104 | char line[LINE_MAX], *p; |
fc116c6a LP |
3105 | unsigned long ttynr; |
3106 | FILE *f; | |
3107 | ||
3108 | if (!(f = fopen("/proc/self/stat", "r"))) | |
3109 | return -errno; | |
3110 | ||
3111 | if (!(fgets(line, sizeof(line), f))) { | |
3112 | k = -errno; | |
3113 | fclose(f); | |
3114 | return k; | |
3115 | } | |
3116 | ||
3117 | fclose(f); | |
3118 | ||
3119 | if (!(p = strrchr(line, ')'))) | |
3120 | return -EIO; | |
3121 | ||
3122 | p++; | |
3123 | ||
3124 | if (sscanf(p, " " | |
3125 | "%*c " /* state */ | |
3126 | "%*d " /* ppid */ | |
3127 | "%*d " /* pgrp */ | |
3128 | "%*d " /* session */ | |
3129 | "%lu ", /* ttynr */ | |
3130 | &ttynr) != 1) | |
3131 | return -EIO; | |
3132 | ||
3133 | *d = (dev_t) ttynr; | |
3134 | return 0; | |
3135 | } | |
3136 | ||
46824d0e | 3137 | int get_ctty(char **r, dev_t *_devnr) { |
fc116c6a | 3138 | int k; |
20c03b7b | 3139 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
3140 | dev_t devnr; |
3141 | ||
3142 | assert(r); | |
3143 | ||
3144 | if ((k = get_ctty_devnr(&devnr)) < 0) | |
3145 | return k; | |
3146 | ||
3147 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
3148 | char_array_0(fn); | |
3149 | ||
3150 | if ((k = readlink_malloc(fn, &s)) < 0) { | |
3151 | ||
3152 | if (k != -ENOENT) | |
3153 | return k; | |
3154 | ||
46824d0e LP |
3155 | /* This is an ugly hack */ |
3156 | if (major(devnr) == 136) { | |
3157 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
3158 | return -ENOMEM; | |
3159 | ||
3160 | *r = b; | |
3161 | if (_devnr) | |
3162 | *_devnr = devnr; | |
3163 | ||
3164 | return 0; | |
3165 | } | |
3166 | ||
fc116c6a LP |
3167 | /* Probably something like the ptys which have no |
3168 | * symlink in /dev/char. Let's return something | |
3169 | * vaguely useful. */ | |
3170 | ||
3171 | if (!(b = strdup(fn + 5))) | |
3172 | return -ENOMEM; | |
3173 | ||
3174 | *r = b; | |
46824d0e LP |
3175 | if (_devnr) |
3176 | *_devnr = devnr; | |
3177 | ||
fc116c6a LP |
3178 | return 0; |
3179 | } | |
3180 | ||
3181 | if (startswith(s, "/dev/")) | |
3182 | p = s + 5; | |
3183 | else if (startswith(s, "../")) | |
3184 | p = s + 3; | |
3185 | else | |
3186 | p = s; | |
3187 | ||
3188 | b = strdup(p); | |
3189 | free(s); | |
3190 | ||
3191 | if (!b) | |
3192 | return -ENOMEM; | |
3193 | ||
3194 | *r = b; | |
46824d0e LP |
3195 | if (_devnr) |
3196 | *_devnr = devnr; | |
3197 | ||
fc116c6a LP |
3198 | return 0; |
3199 | } | |
3200 | ||
8c6db833 LP |
3201 | static int rm_rf_children(int fd, bool only_dirs) { |
3202 | DIR *d; | |
3203 | int ret = 0; | |
3204 | ||
3205 | assert(fd >= 0); | |
3206 | ||
3207 | /* This returns the first error we run into, but nevertheless | |
3208 | * tries to go on */ | |
3209 | ||
3210 | if (!(d = fdopendir(fd))) { | |
3211 | close_nointr_nofail(fd); | |
4c633005 LP |
3212 | |
3213 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
3214 | } |
3215 | ||
3216 | for (;;) { | |
3217 | struct dirent buf, *de; | |
3218 | bool is_dir; | |
3219 | int r; | |
3220 | ||
3221 | if ((r = readdir_r(d, &buf, &de)) != 0) { | |
3222 | if (ret == 0) | |
3223 | ret = -r; | |
3224 | break; | |
3225 | } | |
3226 | ||
3227 | if (!de) | |
3228 | break; | |
3229 | ||
3230 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
3231 | continue; | |
3232 | ||
3233 | if (de->d_type == DT_UNKNOWN) { | |
3234 | struct stat st; | |
3235 | ||
3236 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { | |
4c633005 | 3237 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3238 | ret = -errno; |
3239 | continue; | |
3240 | } | |
3241 | ||
3242 | is_dir = S_ISDIR(st.st_mode); | |
3243 | } else | |
3244 | is_dir = de->d_type == DT_DIR; | |
3245 | ||
3246 | if (is_dir) { | |
3247 | int subdir_fd; | |
3248 | ||
3249 | if ((subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) { | |
4c633005 | 3250 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3251 | ret = -errno; |
3252 | continue; | |
3253 | } | |
3254 | ||
3255 | if ((r = rm_rf_children(subdir_fd, only_dirs)) < 0) { | |
3256 | if (ret == 0) | |
3257 | ret = r; | |
3258 | } | |
3259 | ||
3260 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
4c633005 | 3261 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3262 | ret = -errno; |
3263 | } | |
3264 | } else if (!only_dirs) { | |
3265 | ||
3266 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3267 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3268 | ret = -errno; |
3269 | } | |
3270 | } | |
3271 | } | |
3272 | ||
3273 | closedir(d); | |
3274 | ||
3275 | return ret; | |
3276 | } | |
3277 | ||
3278 | int rm_rf(const char *path, bool only_dirs, bool delete_root) { | |
3279 | int fd; | |
3280 | int r; | |
3281 | ||
3282 | assert(path); | |
3283 | ||
3284 | if ((fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) { | |
3285 | ||
3286 | if (errno != ENOTDIR) | |
3287 | return -errno; | |
3288 | ||
3289 | if (delete_root && !only_dirs) | |
3290 | if (unlink(path) < 0) | |
3291 | return -errno; | |
3292 | ||
3293 | return 0; | |
3294 | } | |
3295 | ||
3296 | r = rm_rf_children(fd, only_dirs); | |
3297 | ||
3298 | if (delete_root) | |
3299 | if (rmdir(path) < 0) { | |
3300 | if (r == 0) | |
3301 | r = -errno; | |
3302 | } | |
3303 | ||
3304 | return r; | |
3305 | } | |
3306 | ||
3307 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { | |
3308 | assert(path); | |
3309 | ||
3310 | /* Under the assumption that we are running privileged we | |
3311 | * first change the access mode and only then hand out | |
3312 | * ownership to avoid a window where access is too open. */ | |
3313 | ||
3314 | if (chmod(path, mode) < 0) | |
3315 | return -errno; | |
3316 | ||
3317 | if (chown(path, uid, gid) < 0) | |
3318 | return -errno; | |
3319 | ||
3320 | return 0; | |
ef2f1067 LP |
3321 | } |
3322 | ||
82c121a4 LP |
3323 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3324 | cpu_set_t *r; | |
3325 | unsigned n = 1024; | |
3326 | ||
3327 | /* Allocates the cpuset in the right size */ | |
3328 | ||
3329 | for (;;) { | |
3330 | if (!(r = CPU_ALLOC(n))) | |
3331 | return NULL; | |
3332 | ||
3333 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3334 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3335 | ||
3336 | if (ncpus) | |
3337 | *ncpus = n; | |
3338 | ||
3339 | return r; | |
3340 | } | |
3341 | ||
3342 | CPU_FREE(r); | |
3343 | ||
3344 | if (errno != EINVAL) | |
3345 | return NULL; | |
3346 | ||
3347 | n *= 2; | |
3348 | } | |
3349 | } | |
3350 | ||
9e58ff9c LP |
3351 | void status_vprintf(const char *format, va_list ap) { |
3352 | char *s = NULL; | |
3353 | int fd = -1; | |
3354 | ||
3355 | assert(format); | |
3356 | ||
3357 | /* This independent of logging, as status messages are | |
3358 | * optional and go exclusively to the console. */ | |
3359 | ||
3360 | if (vasprintf(&s, format, ap) < 0) | |
3361 | goto finish; | |
3362 | ||
3363 | if ((fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) | |
3364 | goto finish; | |
3365 | ||
3366 | write(fd, s, strlen(s)); | |
3367 | ||
3368 | finish: | |
3369 | free(s); | |
3370 | ||
3371 | if (fd >= 0) | |
3372 | close_nointr_nofail(fd); | |
3373 | } | |
3374 | ||
c846ff47 LP |
3375 | void status_printf(const char *format, ...) { |
3376 | va_list ap; | |
3377 | ||
3378 | assert(format); | |
3379 | ||
3380 | va_start(ap, format); | |
3381 | status_vprintf(format, ap); | |
3382 | va_end(ap); | |
3383 | } | |
3384 | ||
3385 | void status_welcome(void) { | |
10aa7034 LP |
3386 | char *pretty_name = NULL, *ansi_color = NULL; |
3387 | const char *const_pretty = NULL, *const_color = NULL; | |
3388 | int r; | |
c846ff47 | 3389 | |
10aa7034 LP |
3390 | if ((r = parse_env_file("/etc/os-release", NEWLINE, |
3391 | "PRETTY_NAME", &pretty_name, | |
3392 | "ANSI_COLOR", &ansi_color, | |
3393 | NULL)) < 0) { | |
c846ff47 | 3394 | |
10aa7034 LP |
3395 | if (r != -ENOENT) |
3396 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3397 | } | |
c846ff47 | 3398 | |
10aa7034 LP |
3399 | #if defined(TARGET_FEDORA) |
3400 | if (!pretty_name) { | |
3401 | if ((r = read_one_line_file("/etc/system-release", &pretty_name)) < 0) { | |
c846ff47 | 3402 | |
10aa7034 LP |
3403 | if (r != -ENOENT) |
3404 | log_warning("Failed to read /etc/system-release: %s", strerror(-r)); | |
6f9a471a | 3405 | } |
10aa7034 | 3406 | } |
c846ff47 | 3407 | |
10aa7034 | 3408 | if (!ansi_color && pretty_name) { |
c846ff47 | 3409 | |
10aa7034 LP |
3410 | /* This tries to mimic the color magic the old Red Hat sysinit |
3411 | * script did. */ | |
3412 | ||
3413 | if (startswith(pretty_name, "Red Hat")) | |
3414 | const_color = "0;31"; /* Red for RHEL */ | |
3415 | else if (startswith(pretty_name, "Fedora")) | |
3416 | const_color = "0;34"; /* Blue for Fedora */ | |
3417 | } | |
c846ff47 LP |
3418 | |
3419 | #elif defined(TARGET_SUSE) | |
c846ff47 | 3420 | |
10aa7034 LP |
3421 | if (!pretty_name) { |
3422 | if ((r = read_one_line_file("/etc/SuSE-release", &pretty_name)) < 0) { | |
c846ff47 | 3423 | |
10aa7034 LP |
3424 | if (r != -ENOENT) |
3425 | log_warning("Failed to read /etc/SuSE-release: %s", strerror(-r)); | |
6f9a471a | 3426 | } |
10aa7034 | 3427 | } |
c846ff47 | 3428 | |
10aa7034 LP |
3429 | if (!ansi_color) |
3430 | const_color = "0;32"; /* Green for openSUSE */ | |
5a6225fd | 3431 | |
0d37b36b | 3432 | #elif defined(TARGET_GENTOO) |
0d37b36b | 3433 | |
10aa7034 LP |
3434 | if (!pretty_name) { |
3435 | if ((r = read_one_line_file("/etc/gentoo-release", &pretty_name)) < 0) { | |
0d37b36b | 3436 | |
10aa7034 LP |
3437 | if (r != -ENOENT) |
3438 | log_warning("Failed to read /etc/gentoo-release: %s", strerror(-r)); | |
6f9a471a | 3439 | } |
10aa7034 | 3440 | } |
0d37b36b | 3441 | |
10aa7034 LP |
3442 | if (!ansi_color) |
3443 | const_color = "1;34"; /* Light Blue for Gentoo */ | |
5a6225fd | 3444 | |
a338bab5 AS |
3445 | #elif defined(TARGET_ALTLINUX) |
3446 | ||
3447 | if (!pretty_name) { | |
3448 | if ((r = read_one_line_file("/etc/altlinux-release", &pretty_name)) < 0) { | |
3449 | ||
3450 | if (r != -ENOENT) | |
3451 | log_warning("Failed to read /etc/altlinux-release: %s", strerror(-r)); | |
6f9a471a | 3452 | } |
a338bab5 AS |
3453 | } |
3454 | ||
3455 | if (!ansi_color) | |
3456 | const_color = "0;36"; /* Cyan for ALTLinux */ | |
3457 | ||
3458 | ||
5a6225fd | 3459 | #elif defined(TARGET_DEBIAN) |
5a6225fd | 3460 | |
10aa7034 | 3461 | if (!pretty_name) { |
22927a36 | 3462 | char *version; |
c8bffa43 | 3463 | |
22927a36 | 3464 | if ((r = read_one_line_file("/etc/debian_version", &version)) < 0) { |
5a6225fd | 3465 | |
10aa7034 LP |
3466 | if (r != -ENOENT) |
3467 | log_warning("Failed to read /etc/debian_version: %s", strerror(-r)); | |
22927a36 | 3468 | } else { |
22927a36 MB |
3469 | pretty_name = strappend("Debian ", version); |
3470 | free(version); | |
c8bffa43 LP |
3471 | |
3472 | if (!pretty_name) | |
3473 | log_warning("Failed to allocate Debian version string."); | |
22927a36 | 3474 | } |
10aa7034 | 3475 | } |
5a6225fd | 3476 | |
10aa7034 LP |
3477 | if (!ansi_color) |
3478 | const_color = "1;31"; /* Light Red for Debian */ | |
5a6225fd | 3479 | |
274914f9 | 3480 | #elif defined(TARGET_UBUNTU) |
10aa7034 LP |
3481 | |
3482 | if ((r = parse_env_file("/etc/lsb-release", NEWLINE, | |
3483 | "DISTRIB_DESCRIPTION", &pretty_name, | |
3484 | NULL)) < 0) { | |
3485 | ||
3486 | if (r != -ENOENT) | |
3487 | log_warning("Failed to read /etc/lsb-release: %s", strerror(-r)); | |
3488 | } | |
3489 | ||
3490 | if (!ansi_color) | |
3491 | const_color = "0;33"; /* Orange/Brown for Ubuntu */ | |
3492 | ||
1de4d79b AB |
3493 | #elif defined(TARGET_MANDRIVA) |
3494 | ||
3495 | if (!pretty_name) { | |
3496 | char *s, *p; | |
3497 | ||
3498 | if ((r = read_one_line_file("/etc/mandriva-release", &s) < 0)) { | |
3499 | if (r != -ENOENT) | |
3500 | log_warning("Failed to read /etc/mandriva-release: %s", strerror(-r)); | |
3501 | } else { | |
3502 | p = strstr(s, " release "); | |
3503 | if (p) { | |
3504 | *p = '\0'; | |
3505 | p += 9; | |
3506 | p[strcspn(p, " ")] = '\0'; | |
3507 | ||
3508 | /* This corresponds to standard rc.sysinit */ | |
3509 | if (asprintf(&pretty_name, "%s\x1B[0;39m %s", s, p) > 0) | |
3510 | const_color = "1;36"; | |
3511 | else | |
3512 | log_warning("Failed to allocate Mandriva version string."); | |
3513 | } else | |
3514 | log_warning("Failed to parse /etc/mandriva-release"); | |
3515 | free(s); | |
3516 | } | |
3517 | } | |
54e4fdef | 3518 | #elif defined(TARGET_MEEGO) |
1de4d79b | 3519 | |
54e4fdef CF |
3520 | if (!pretty_name) { |
3521 | if ((r = read_one_line_file("/etc/meego-release", &pretty_name)) < 0) { | |
3522 | ||
3523 | if (r != -ENOENT) | |
3524 | log_warning("Failed to read /etc/meego-release: %s", strerror(-r)); | |
3525 | } | |
3526 | } | |
3527 | ||
3528 | if (!ansi_color) | |
3529 | const_color = "1;35"; /* Bright Magenta for MeeGo */ | |
c846ff47 | 3530 | #endif |
10aa7034 LP |
3531 | |
3532 | if (!pretty_name && !const_pretty) | |
3533 | const_pretty = "Linux"; | |
3534 | ||
3535 | if (!ansi_color && !const_color) | |
3536 | const_color = "1"; | |
3537 | ||
da71f23c | 3538 | status_printf("\nWelcome to \x1B[%sm%s\x1B[0m!\n\n", |
10aa7034 LP |
3539 | const_color ? const_color : ansi_color, |
3540 | const_pretty ? const_pretty : pretty_name); | |
86a3475b LP |
3541 | |
3542 | free(ansi_color); | |
3543 | free(pretty_name); | |
c846ff47 LP |
3544 | } |
3545 | ||
fab56fc5 LP |
3546 | char *replace_env(const char *format, char **env) { |
3547 | enum { | |
3548 | WORD, | |
c24eb49e | 3549 | CURLY, |
fab56fc5 LP |
3550 | VARIABLE |
3551 | } state = WORD; | |
3552 | ||
3553 | const char *e, *word = format; | |
3554 | char *r = NULL, *k; | |
3555 | ||
3556 | assert(format); | |
3557 | ||
3558 | for (e = format; *e; e ++) { | |
3559 | ||
3560 | switch (state) { | |
3561 | ||
3562 | case WORD: | |
3563 | if (*e == '$') | |
c24eb49e | 3564 | state = CURLY; |
fab56fc5 LP |
3565 | break; |
3566 | ||
c24eb49e LP |
3567 | case CURLY: |
3568 | if (*e == '{') { | |
fab56fc5 LP |
3569 | if (!(k = strnappend(r, word, e-word-1))) |
3570 | goto fail; | |
3571 | ||
3572 | free(r); | |
3573 | r = k; | |
3574 | ||
3575 | word = e-1; | |
3576 | state = VARIABLE; | |
3577 | ||
3578 | } else if (*e == '$') { | |
3579 | if (!(k = strnappend(r, word, e-word))) | |
3580 | goto fail; | |
3581 | ||
3582 | free(r); | |
3583 | r = k; | |
3584 | ||
3585 | word = e+1; | |
3586 | state = WORD; | |
3587 | } else | |
3588 | state = WORD; | |
3589 | break; | |
3590 | ||
3591 | case VARIABLE: | |
c24eb49e | 3592 | if (*e == '}') { |
b95cf362 | 3593 | const char *t; |
fab56fc5 | 3594 | |
b95cf362 LP |
3595 | if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) |
3596 | t = ""; | |
fab56fc5 | 3597 | |
b95cf362 LP |
3598 | if (!(k = strappend(r, t))) |
3599 | goto fail; | |
fab56fc5 | 3600 | |
b95cf362 LP |
3601 | free(r); |
3602 | r = k; | |
fab56fc5 | 3603 | |
b95cf362 | 3604 | word = e+1; |
fab56fc5 LP |
3605 | state = WORD; |
3606 | } | |
3607 | break; | |
3608 | } | |
3609 | } | |
3610 | ||
3611 | if (!(k = strnappend(r, word, e-word))) | |
3612 | goto fail; | |
3613 | ||
3614 | free(r); | |
3615 | return k; | |
3616 | ||
3617 | fail: | |
3618 | free(r); | |
3619 | return NULL; | |
3620 | } | |
3621 | ||
3622 | char **replace_env_argv(char **argv, char **env) { | |
3623 | char **r, **i; | |
c24eb49e LP |
3624 | unsigned k = 0, l = 0; |
3625 | ||
3626 | l = strv_length(argv); | |
fab56fc5 | 3627 | |
c24eb49e | 3628 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3629 | return NULL; |
3630 | ||
3631 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3632 | |
3633 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3634 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3635 | char *e; | |
3636 | char **w, **m; | |
3637 | unsigned q; | |
c24eb49e | 3638 | |
b95cf362 | 3639 | if ((e = strv_env_get(env, *i+1))) { |
c24eb49e LP |
3640 | |
3641 | if (!(m = strv_split_quoted(e))) { | |
3642 | r[k] = NULL; | |
3643 | strv_free(r); | |
3644 | return NULL; | |
3645 | } | |
b95cf362 LP |
3646 | } else |
3647 | m = NULL; | |
c24eb49e | 3648 | |
b95cf362 LP |
3649 | q = strv_length(m); |
3650 | l = l + q - 1; | |
c24eb49e | 3651 | |
b95cf362 LP |
3652 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3653 | r[k] = NULL; | |
3654 | strv_free(r); | |
3655 | strv_free(m); | |
3656 | return NULL; | |
3657 | } | |
c24eb49e | 3658 | |
b95cf362 LP |
3659 | r = w; |
3660 | if (m) { | |
c24eb49e LP |
3661 | memcpy(r + k, m, q * sizeof(char*)); |
3662 | free(m); | |
c24eb49e | 3663 | } |
b95cf362 LP |
3664 | |
3665 | k += q; | |
3666 | continue; | |
c24eb49e LP |
3667 | } |
3668 | ||
3669 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3670 | if (!(r[k++] = replace_env(*i, env))) { |
3671 | strv_free(r); | |
3672 | return NULL; | |
3673 | } | |
3674 | } | |
3675 | ||
3676 | r[k] = NULL; | |
3677 | return r; | |
3678 | } | |
3679 | ||
fa776d8e LP |
3680 | int columns(void) { |
3681 | static __thread int parsed_columns = 0; | |
3682 | const char *e; | |
3683 | ||
3684 | if (parsed_columns > 0) | |
3685 | return parsed_columns; | |
3686 | ||
3687 | if ((e = getenv("COLUMNS"))) | |
3688 | parsed_columns = atoi(e); | |
3689 | ||
3690 | if (parsed_columns <= 0) { | |
3691 | struct winsize ws; | |
3692 | zero(ws); | |
3693 | ||
9ed95f43 | 3694 | if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) >= 0) |
fa776d8e LP |
3695 | parsed_columns = ws.ws_col; |
3696 | } | |
3697 | ||
3698 | if (parsed_columns <= 0) | |
3699 | parsed_columns = 80; | |
3700 | ||
3701 | return parsed_columns; | |
3702 | } | |
3703 | ||
b4f10a5e LP |
3704 | int running_in_chroot(void) { |
3705 | struct stat a, b; | |
3706 | ||
3707 | zero(a); | |
3708 | zero(b); | |
3709 | ||
3710 | /* Only works as root */ | |
3711 | ||
3712 | if (stat("/proc/1/root", &a) < 0) | |
3713 | return -errno; | |
3714 | ||
3715 | if (stat("/", &b) < 0) | |
3716 | return -errno; | |
3717 | ||
3718 | return | |
3719 | a.st_dev != b.st_dev || | |
3720 | a.st_ino != b.st_ino; | |
3721 | } | |
3722 | ||
8fe914ec LP |
3723 | char *ellipsize(const char *s, unsigned length, unsigned percent) { |
3724 | size_t l, x; | |
3725 | char *r; | |
3726 | ||
3727 | assert(s); | |
3728 | assert(percent <= 100); | |
3729 | assert(length >= 3); | |
3730 | ||
3731 | l = strlen(s); | |
3732 | ||
3733 | if (l <= 3 || l <= length) | |
3734 | return strdup(s); | |
3735 | ||
3736 | if (!(r = new0(char, length+1))) | |
3737 | return r; | |
3738 | ||
3739 | x = (length * percent) / 100; | |
3740 | ||
3741 | if (x > length - 3) | |
3742 | x = length - 3; | |
3743 | ||
3744 | memcpy(r, s, x); | |
3745 | r[x] = '.'; | |
3746 | r[x+1] = '.'; | |
3747 | r[x+2] = '.'; | |
3748 | memcpy(r + x + 3, | |
3749 | s + l - (length - x - 3), | |
3750 | length - x - 3); | |
3751 | ||
3752 | return r; | |
3753 | } | |
3754 | ||
f6144808 LP |
3755 | int touch(const char *path) { |
3756 | int fd; | |
3757 | ||
3758 | assert(path); | |
3759 | ||
14f3c825 | 3760 | if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0) |
f6144808 LP |
3761 | return -errno; |
3762 | ||
3763 | close_nointr_nofail(fd); | |
3764 | return 0; | |
3765 | } | |
afea26ad | 3766 | |
97c4a07d | 3767 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3768 | size_t l; |
3769 | assert(s); | |
3770 | ||
3771 | if ((l = strlen(s)) < 2) | |
3772 | return strdup(s); | |
3773 | ||
97c4a07d | 3774 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3775 | return strndup(s+1, l-2); |
3776 | ||
3777 | return strdup(s); | |
3778 | } | |
3779 | ||
5f7c426e LP |
3780 | char *normalize_env_assignment(const char *s) { |
3781 | char *name, *value, *p, *r; | |
3782 | ||
3783 | p = strchr(s, '='); | |
3784 | ||
3785 | if (!p) { | |
3786 | if (!(r = strdup(s))) | |
3787 | return NULL; | |
3788 | ||
3789 | return strstrip(r); | |
3790 | } | |
3791 | ||
3792 | if (!(name = strndup(s, p - s))) | |
3793 | return NULL; | |
3794 | ||
3795 | if (!(p = strdup(p+1))) { | |
3796 | free(name); | |
3797 | return NULL; | |
3798 | } | |
3799 | ||
3800 | value = unquote(strstrip(p), QUOTES); | |
3801 | free(p); | |
3802 | ||
3803 | if (!value) { | |
5f7c426e LP |
3804 | free(name); |
3805 | return NULL; | |
3806 | } | |
3807 | ||
3808 | if (asprintf(&r, "%s=%s", name, value) < 0) | |
3809 | r = NULL; | |
3810 | ||
3811 | free(value); | |
3812 | free(name); | |
3813 | ||
3814 | return r; | |
3815 | } | |
3816 | ||
8e12a6ae | 3817 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
2e78aa99 LP |
3818 | assert(pid >= 1); |
3819 | assert(status); | |
3820 | ||
3821 | for (;;) { | |
8e12a6ae LP |
3822 | zero(*status); |
3823 | ||
3824 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3825 | |
3826 | if (errno == EINTR) | |
3827 | continue; | |
3828 | ||
3829 | return -errno; | |
3830 | } | |
3831 | ||
3832 | return 0; | |
3833 | } | |
3834 | } | |
3835 | ||
97c4a07d LP |
3836 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3837 | int r; | |
3838 | siginfo_t status; | |
3839 | ||
3840 | assert(name); | |
3841 | assert(pid > 1); | |
3842 | ||
3843 | if ((r = wait_for_terminate(pid, &status)) < 0) { | |
3844 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); | |
3845 | return r; | |
3846 | } | |
3847 | ||
3848 | if (status.si_code == CLD_EXITED) { | |
3849 | if (status.si_status != 0) { | |
3850 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3851 | return status.si_status; |
97c4a07d LP |
3852 | } |
3853 | ||
3854 | log_debug("%s succeeded.", name); | |
3855 | return 0; | |
3856 | ||
3857 | } else if (status.si_code == CLD_KILLED || | |
3858 | status.si_code == CLD_DUMPED) { | |
3859 | ||
3860 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3861 | return -EPROTO; | |
3862 | } | |
3863 | ||
3864 | log_warning("%s failed due to unknown reason.", name); | |
3865 | return -EPROTO; | |
3866 | ||
3867 | } | |
3868 | ||
3c14d26c | 3869 | void freeze(void) { |
720ce21d LP |
3870 | |
3871 | /* Make sure nobody waits for us on a socket anymore */ | |
3872 | close_all_fds(NULL, 0); | |
3873 | ||
c29597a1 LP |
3874 | sync(); |
3875 | ||
3c14d26c LP |
3876 | for (;;) |
3877 | pause(); | |
3878 | } | |
3879 | ||
00dc5d76 LP |
3880 | bool null_or_empty(struct stat *st) { |
3881 | assert(st); | |
3882 | ||
3883 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3884 | return true; | |
3885 | ||
c8f26f42 | 3886 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3887 | return true; |
3888 | ||
3889 | return false; | |
3890 | } | |
3891 | ||
a247755d | 3892 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3893 | int nfd; |
3894 | DIR *d; | |
3895 | ||
3896 | if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0) | |
3897 | return NULL; | |
3898 | ||
3899 | if (!(d = fdopendir(nfd))) { | |
3900 | close_nointr_nofail(nfd); | |
3901 | return NULL; | |
3902 | } | |
3903 | ||
3904 | return d; | |
3b63d2d3 LP |
3905 | } |
3906 | ||
8a0867d6 LP |
3907 | int signal_from_string_try_harder(const char *s) { |
3908 | int signo; | |
3909 | assert(s); | |
3910 | ||
3911 | if ((signo = signal_from_string(s)) <= 0) | |
3912 | if (startswith(s, "SIG")) | |
3913 | return signal_from_string(s+3); | |
3914 | ||
3915 | return signo; | |
3916 | } | |
3917 | ||
10717a1a LP |
3918 | void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { |
3919 | ||
3920 | assert(f); | |
3921 | assert(name); | |
3922 | assert(t); | |
3923 | ||
3924 | if (!dual_timestamp_is_set(t)) | |
3925 | return; | |
3926 | ||
3927 | fprintf(f, "%s=%llu %llu\n", | |
3928 | name, | |
3929 | (unsigned long long) t->realtime, | |
3930 | (unsigned long long) t->monotonic); | |
3931 | } | |
3932 | ||
799fd0fd | 3933 | void dual_timestamp_deserialize(const char *value, dual_timestamp *t) { |
10717a1a LP |
3934 | unsigned long long a, b; |
3935 | ||
10717a1a LP |
3936 | assert(value); |
3937 | assert(t); | |
3938 | ||
3939 | if (sscanf(value, "%lli %llu", &a, &b) != 2) | |
3940 | log_debug("Failed to parse finish timestamp value %s", value); | |
3941 | else { | |
3942 | t->realtime = a; | |
3943 | t->monotonic = b; | |
3944 | } | |
3945 | } | |
3946 | ||
e23a0ce8 LP |
3947 | char *fstab_node_to_udev_node(const char *p) { |
3948 | char *dn, *t, *u; | |
3949 | int r; | |
3950 | ||
3951 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
3952 | * UTF8 chars unescaped */ | |
3953 | ||
3954 | if (startswith(p, "LABEL=")) { | |
3955 | ||
3956 | if (!(u = unquote(p+6, "\"\'"))) | |
3957 | return NULL; | |
3958 | ||
3959 | t = xescape(u, "/ "); | |
3960 | free(u); | |
3961 | ||
3962 | if (!t) | |
3963 | return NULL; | |
3964 | ||
3965 | r = asprintf(&dn, "/dev/disk/by-label/%s", t); | |
3966 | free(t); | |
3967 | ||
3968 | if (r < 0) | |
3969 | return NULL; | |
3970 | ||
3971 | return dn; | |
3972 | } | |
3973 | ||
3974 | if (startswith(p, "UUID=")) { | |
3975 | ||
3976 | if (!(u = unquote(p+5, "\"\'"))) | |
3977 | return NULL; | |
3978 | ||
3979 | t = xescape(u, "/ "); | |
3980 | free(u); | |
3981 | ||
3982 | if (!t) | |
3983 | return NULL; | |
3984 | ||
0058d7b9 | 3985 | r = asprintf(&dn, "/dev/disk/by-uuid/%s", t); |
e23a0ce8 LP |
3986 | free(t); |
3987 | ||
3988 | if (r < 0) | |
3989 | return NULL; | |
3990 | ||
3991 | return dn; | |
3992 | } | |
3993 | ||
3994 | return strdup(p); | |
3995 | } | |
3996 | ||
e9ddabc2 LP |
3997 | void filter_environ(const char *prefix) { |
3998 | int i, j; | |
3999 | assert(prefix); | |
4000 | ||
4001 | if (!environ) | |
4002 | return; | |
4003 | ||
4004 | for (i = 0, j = 0; environ[i]; i++) { | |
4005 | ||
4006 | if (startswith(environ[i], prefix)) | |
4007 | continue; | |
4008 | ||
4009 | environ[j++] = environ[i]; | |
4010 | } | |
4011 | ||
4012 | environ[j] = NULL; | |
4013 | } | |
4014 | ||
f212ac12 LP |
4015 | bool tty_is_vc(const char *tty) { |
4016 | assert(tty); | |
4017 | ||
4018 | if (startswith(tty, "/dev/")) | |
4019 | tty += 5; | |
4020 | ||
4021 | return startswith(tty, "tty") && | |
4022 | tty[3] >= '0' && tty[3] <= '9'; | |
4023 | } | |
4024 | ||
e3aa71c3 | 4025 | const char *default_term_for_tty(const char *tty) { |
3030ccd7 LP |
4026 | char *active = NULL; |
4027 | const char *term; | |
4028 | ||
e3aa71c3 LP |
4029 | assert(tty); |
4030 | ||
4031 | if (startswith(tty, "/dev/")) | |
4032 | tty += 5; | |
4033 | ||
3030ccd7 LP |
4034 | /* Resolve where /dev/console is pointing when determining |
4035 | * TERM */ | |
4036 | if (streq(tty, "console")) | |
4037 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { | |
079a09fb LP |
4038 | /* If multiple log outputs are configured the |
4039 | * last one is what /dev/console points to */ | |
4040 | if ((tty = strrchr(active, ' '))) | |
4041 | tty++; | |
4042 | else | |
4043 | tty = active; | |
3030ccd7 LP |
4044 | } |
4045 | ||
f212ac12 | 4046 | term = tty_is_vc(tty) ? "TERM=linux" : "TERM=vt100"; |
3030ccd7 | 4047 | free(active); |
e3aa71c3 | 4048 | |
3030ccd7 | 4049 | return term; |
e3aa71c3 LP |
4050 | } |
4051 | ||
07faed4f LP |
4052 | /* Returns a short identifier for the various VM implementations */ |
4053 | int detect_vm(const char **id) { | |
46a08e38 LP |
4054 | |
4055 | #if defined(__i386__) || defined(__x86_64__) | |
4056 | ||
4057 | /* Both CPUID and DMI are x86 specific interfaces... */ | |
4058 | ||
721bca57 | 4059 | static const char *const dmi_vendors[] = { |
46a08e38 LP |
4060 | "/sys/class/dmi/id/sys_vendor", |
4061 | "/sys/class/dmi/id/board_vendor", | |
4062 | "/sys/class/dmi/id/bios_vendor" | |
4063 | }; | |
4064 | ||
4e08da90 | 4065 | static const char dmi_vendor_table[] = |
07faed4f LP |
4066 | "QEMU\0" "qemu\0" |
4067 | /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */ | |
4068 | "VMware\0" "vmware\0" | |
4069 | "VMW\0" "vmware\0" | |
4070 | "Microsoft Corporation\0" "microsoft\0" | |
4071 | "innotek GmbH\0" "oracle\0" | |
4072 | "Xen\0" "xen\0" | |
34df5a34 | 4073 | "Bochs\0" "bochs\0"; |
07faed4f | 4074 | |
4e08da90 | 4075 | static const char cpuid_vendor_table[] = |
07faed4f LP |
4076 | "XenVMMXenVMM\0" "xen\0" |
4077 | "KVMKVMKVM\0" "kvm\0" | |
4078 | /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */ | |
4079 | "VMwareVMware\0" "vmware\0" | |
4080 | /* http://msdn.microsoft.com/en-us/library/ff542428.aspx */ | |
34df5a34 | 4081 | "Microsoft Hv\0" "microsoft\0"; |
07faed4f LP |
4082 | |
4083 | uint32_t eax, ecx; | |
46a08e38 LP |
4084 | union { |
4085 | uint32_t sig32[3]; | |
4086 | char text[13]; | |
4087 | } sig; | |
46a08e38 | 4088 | unsigned i; |
07faed4f | 4089 | const char *j, *k; |
721bca57 | 4090 | bool hypervisor; |
46a08e38 LP |
4091 | |
4092 | /* http://lwn.net/Articles/301888/ */ | |
4093 | zero(sig); | |
4094 | ||
46a08e38 LP |
4095 | #if defined (__i386__) |
4096 | #define REG_a "eax" | |
4097 | #define REG_b "ebx" | |
4098 | #elif defined (__amd64__) | |
4099 | #define REG_a "rax" | |
4100 | #define REG_b "rbx" | |
4101 | #endif | |
4102 | ||
07faed4f LP |
4103 | /* First detect whether there is a hypervisor */ |
4104 | eax = 1; | |
46a08e38 LP |
4105 | __asm__ __volatile__ ( |
4106 | /* ebx/rbx is being used for PIC! */ | |
4107 | " push %%"REG_b" \n\t" | |
4108 | " cpuid \n\t" | |
46a08e38 LP |
4109 | " pop %%"REG_b" \n\t" |
4110 | ||
07faed4f | 4111 | : "=a" (eax), "=c" (ecx) |
46a08e38 LP |
4112 | : "0" (eax) |
4113 | ); | |
4114 | ||
ec195f55 | 4115 | hypervisor = !!(ecx & 0x80000000U); |
721bca57 LP |
4116 | |
4117 | if (hypervisor) { | |
07faed4f LP |
4118 | |
4119 | /* There is a hypervisor, see what it is */ | |
4120 | eax = 0x40000000U; | |
4121 | __asm__ __volatile__ ( | |
4122 | /* ebx/rbx is being used for PIC! */ | |
4123 | " push %%"REG_b" \n\t" | |
4124 | " cpuid \n\t" | |
4125 | " mov %%ebx, %1 \n\t" | |
4126 | " pop %%"REG_b" \n\t" | |
4127 | ||
4128 | : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2]) | |
4129 | : "0" (eax) | |
4130 | ); | |
4131 | ||
4132 | NULSTR_FOREACH_PAIR(j, k, cpuid_vendor_table) | |
4133 | if (streq(sig.text, j)) { | |
4134 | ||
4135 | if (id) | |
4136 | *id = k; | |
4137 | ||
4138 | return 1; | |
4139 | } | |
721bca57 | 4140 | } |
07faed4f | 4141 | |
721bca57 LP |
4142 | for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) { |
4143 | char *s; | |
4144 | int r; | |
4145 | const char *found = NULL; | |
4146 | ||
4147 | if ((r = read_one_line_file(dmi_vendors[i], &s)) < 0) { | |
4148 | if (r != -ENOENT) | |
4149 | return r; | |
4150 | ||
4151 | continue; | |
4152 | } | |
4153 | ||
4154 | NULSTR_FOREACH_PAIR(j, k, dmi_vendor_table) | |
4155 | if (startswith(s, j)) | |
4156 | found = k; | |
4157 | free(s); | |
4158 | ||
4159 | if (found) { | |
4160 | if (id) | |
4161 | *id = found; | |
4162 | ||
4163 | return 1; | |
4164 | } | |
4165 | } | |
4166 | ||
4167 | if (hypervisor) { | |
07faed4f LP |
4168 | if (id) |
4169 | *id = "other"; | |
4170 | ||
4171 | return 1; | |
4172 | } | |
46a08e38 | 4173 | |
721bca57 | 4174 | #endif |
07faed4f LP |
4175 | return 0; |
4176 | } | |
4177 | ||
ef2df9f4 | 4178 | int detect_container(const char **id) { |
f9b9232b LP |
4179 | FILE *f; |
4180 | ||
ef2df9f4 LP |
4181 | /* Unfortunately many of these operations require root access |
4182 | * in one way or another */ | |
f9b9232b | 4183 | |
ef2df9f4 LP |
4184 | if (geteuid() != 0) |
4185 | return -EPERM; | |
4186 | ||
4187 | if (running_in_chroot() > 0) { | |
f9b9232b LP |
4188 | |
4189 | if (id) | |
ef2df9f4 | 4190 | *id = "chroot"; |
f9b9232b LP |
4191 | |
4192 | return 1; | |
4193 | } | |
07faed4f | 4194 | |
ef2df9f4 LP |
4195 | /* /proc/vz exists in container and outside of the container, |
4196 | * /proc/bc only outside of the container. */ | |
4197 | if (access("/proc/vz", F_OK) >= 0 && | |
4198 | access("/proc/bc", F_OK) < 0) { | |
07faed4f | 4199 | |
ef2df9f4 LP |
4200 | if (id) |
4201 | *id = "openvz"; | |
4202 | ||
4203 | return 1; | |
f9b9232b | 4204 | } |
07faed4f | 4205 | |
f9b9232b LP |
4206 | if ((f = fopen("/proc/self/cgroup", "r"))) { |
4207 | ||
4208 | for (;;) { | |
4209 | char line[LINE_MAX], *p; | |
4210 | ||
4211 | if (!fgets(line, sizeof(line), f)) | |
4212 | break; | |
4213 | ||
4214 | if (!(p = strchr(strstrip(line), ':'))) | |
4215 | continue; | |
4216 | ||
4217 | if (strncmp(p, ":ns:", 4)) | |
4218 | continue; | |
4219 | ||
4220 | if (!streq(p, ":ns:/")) { | |
4221 | fclose(f); | |
4222 | ||
ef2df9f4 | 4223 | if (id) |
28cf382a | 4224 | *id = "pidns"; |
ef2df9f4 LP |
4225 | |
4226 | return 1; | |
f9b9232b LP |
4227 | } |
4228 | } | |
4229 | ||
4230 | fclose(f); | |
07faed4f LP |
4231 | } |
4232 | ||
ef2df9f4 LP |
4233 | return 0; |
4234 | } | |
4235 | ||
4236 | /* Returns a short identifier for the various VM/container implementations */ | |
4237 | int detect_virtualization(const char **id) { | |
4238 | static __thread const char *cached_id = NULL; | |
4239 | const char *_id; | |
4240 | int r; | |
4241 | ||
4242 | if (cached_id) { | |
4243 | ||
4244 | if (cached_id == (const char*) -1) | |
4245 | return 0; | |
4246 | ||
4247 | if (id) | |
4248 | *id = cached_id; | |
4249 | ||
4250 | return 1; | |
f9b9232b | 4251 | } |
07faed4f | 4252 | |
ef2df9f4 LP |
4253 | if ((r = detect_container(&_id)) != 0) |
4254 | goto finish; | |
4255 | ||
f9b9232b | 4256 | r = detect_vm(&_id); |
07faed4f | 4257 | |
f9b9232b | 4258 | finish: |
ef2df9f4 | 4259 | if (r > 0) { |
f9b9232b | 4260 | cached_id = _id; |
07faed4f | 4261 | |
ef2df9f4 LP |
4262 | if (id) |
4263 | *id = _id; | |
4264 | } else if (r == 0) | |
4265 | cached_id = (const char*) -1; | |
f9b9232b LP |
4266 | |
4267 | return r; | |
46a08e38 LP |
4268 | } |
4269 | ||
fb19a739 LP |
4270 | bool dirent_is_file(struct dirent *de) { |
4271 | assert(de); | |
4272 | ||
4273 | if (ignore_file(de->d_name)) | |
4274 | return false; | |
4275 | ||
4276 | if (de->d_type != DT_REG && | |
4277 | de->d_type != DT_LNK && | |
4278 | de->d_type != DT_UNKNOWN) | |
4279 | return false; | |
4280 | ||
4281 | return true; | |
4282 | } | |
4283 | ||
83cc030f LP |
4284 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
4285 | DIR *_d = NULL; | |
4286 | struct dirent *de; | |
4287 | Hashmap *pids = NULL; | |
4288 | ||
4289 | assert(directory); | |
4290 | ||
4291 | /* Executes all binaries in a directory in parallel and waits | |
4292 | * until all they all finished. */ | |
4293 | ||
4294 | if (!d) { | |
4295 | if (!(_d = opendir(directory))) { | |
4296 | ||
4297 | if (errno == ENOENT) | |
4298 | return; | |
4299 | ||
4300 | log_error("Failed to enumerate directory %s: %m", directory); | |
4301 | return; | |
4302 | } | |
4303 | ||
4304 | d = _d; | |
4305 | } | |
4306 | ||
4307 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
4308 | log_error("Failed to allocate set."); | |
4309 | goto finish; | |
4310 | } | |
4311 | ||
4312 | while ((de = readdir(d))) { | |
4313 | char *path; | |
4314 | pid_t pid; | |
4315 | int k; | |
4316 | ||
fb19a739 | 4317 | if (!dirent_is_file(de)) |
83cc030f LP |
4318 | continue; |
4319 | ||
4320 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
4321 | log_error("Out of memory"); | |
4322 | continue; | |
4323 | } | |
4324 | ||
4325 | if ((pid = fork()) < 0) { | |
4326 | log_error("Failed to fork: %m"); | |
4327 | free(path); | |
4328 | continue; | |
4329 | } | |
4330 | ||
4331 | if (pid == 0) { | |
4332 | char *_argv[2]; | |
4333 | /* Child */ | |
4334 | ||
4335 | if (!argv) { | |
4336 | _argv[0] = path; | |
4337 | _argv[1] = NULL; | |
4338 | argv = _argv; | |
4339 | } else | |
4340 | if (!argv[0]) | |
4341 | argv[0] = path; | |
4342 | ||
4343 | execv(path, argv); | |
4344 | ||
4345 | log_error("Failed to execute %s: %m", path); | |
4346 | _exit(EXIT_FAILURE); | |
4347 | } | |
4348 | ||
4349 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
4350 | ||
4351 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
4352 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
4353 | free(path); | |
4354 | } | |
4355 | } | |
4356 | ||
4357 | while (!hashmap_isempty(pids)) { | |
4358 | siginfo_t si; | |
4359 | char *path; | |
4360 | ||
4361 | zero(si); | |
4362 | if (waitid(P_ALL, 0, &si, WEXITED) < 0) { | |
4363 | ||
4364 | if (errno == EINTR) | |
4365 | continue; | |
4366 | ||
4367 | log_error("waitid() failed: %m"); | |
4368 | goto finish; | |
4369 | } | |
4370 | ||
4371 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
4372 | if (!is_clean_exit(si.si_code, si.si_status)) { | |
4373 | if (si.si_code == CLD_EXITED) | |
4374 | log_error("%s exited with exit status %i.", path, si.si_status); | |
4375 | else | |
4376 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
4377 | } else | |
4378 | log_debug("%s exited successfully.", path); | |
4379 | ||
4380 | free(path); | |
4381 | } | |
4382 | } | |
4383 | ||
4384 | finish: | |
4385 | if (_d) | |
4386 | closedir(_d); | |
4387 | ||
4388 | if (pids) | |
4389 | hashmap_free_free(pids); | |
4390 | } | |
4391 | ||
430c18ed LP |
4392 | int kill_and_sigcont(pid_t pid, int sig) { |
4393 | int r; | |
4394 | ||
4395 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4396 | ||
4397 | if (r >= 0) | |
4398 | kill(pid, SIGCONT); | |
4399 | ||
4400 | return r; | |
4401 | } | |
4402 | ||
05feefe0 LP |
4403 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4404 | const char *i; | |
4405 | ||
4406 | if (!nulstr) | |
4407 | return false; | |
4408 | ||
4409 | NULSTR_FOREACH(i, nulstr) | |
4410 | if (streq(i, needle)) | |
4411 | return true; | |
4412 | ||
4413 | return false; | |
4414 | } | |
4415 | ||
6faa1114 | 4416 | bool plymouth_running(void) { |
9408a2d2 | 4417 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4418 | } |
4419 | ||
7c3b203c LP |
4420 | void parse_syslog_priority(char **p, int *priority) { |
4421 | int a = 0, b = 0, c = 0; | |
4422 | int k; | |
4423 | ||
4424 | assert(p); | |
4425 | assert(*p); | |
4426 | assert(priority); | |
4427 | ||
4428 | if ((*p)[0] != '<') | |
4429 | return; | |
4430 | ||
4431 | if (!strchr(*p, '>')) | |
4432 | return; | |
4433 | ||
4434 | if ((*p)[2] == '>') { | |
4435 | c = undecchar((*p)[1]); | |
4436 | k = 3; | |
4437 | } else if ((*p)[3] == '>') { | |
4438 | b = undecchar((*p)[1]); | |
4439 | c = undecchar((*p)[2]); | |
4440 | k = 4; | |
4441 | } else if ((*p)[4] == '>') { | |
4442 | a = undecchar((*p)[1]); | |
4443 | b = undecchar((*p)[2]); | |
4444 | c = undecchar((*p)[3]); | |
4445 | k = 5; | |
4446 | } else | |
4447 | return; | |
4448 | ||
4449 | if (a < 0 || b < 0 || c < 0) | |
4450 | return; | |
4451 | ||
4452 | *priority = a*100+b*10+c; | |
4453 | *p += k; | |
4454 | } | |
4455 | ||
ac123445 LP |
4456 | int have_effective_cap(int value) { |
4457 | cap_t cap; | |
4458 | cap_flag_value_t fv; | |
4459 | int r; | |
4460 | ||
4461 | if (!(cap = cap_get_proc())) | |
4462 | return -errno; | |
4463 | ||
4464 | if (cap_get_flag(cap, value, CAP_EFFECTIVE, &fv) < 0) | |
4465 | r = -errno; | |
4466 | else | |
4467 | r = fv == CAP_SET; | |
4468 | ||
4469 | cap_free(cap); | |
4470 | return r; | |
4471 | } | |
4472 | ||
9beb3f4d LP |
4473 | char* strshorten(char *s, size_t l) { |
4474 | assert(s); | |
4475 | ||
4476 | if (l < strlen(s)) | |
4477 | s[l] = 0; | |
4478 | ||
4479 | return s; | |
4480 | } | |
4481 | ||
4482 | static bool hostname_valid_char(char c) { | |
4483 | return | |
4484 | (c >= 'a' && c <= 'z') || | |
4485 | (c >= 'A' && c <= 'Z') || | |
4486 | (c >= '0' && c <= '9') || | |
4487 | c == '-' || | |
4488 | c == '_' || | |
4489 | c == '.'; | |
4490 | } | |
4491 | ||
4492 | bool hostname_is_valid(const char *s) { | |
4493 | const char *p; | |
4494 | ||
4495 | if (isempty(s)) | |
4496 | return false; | |
4497 | ||
4498 | for (p = s; *p; p++) | |
4499 | if (!hostname_valid_char(*p)) | |
4500 | return false; | |
4501 | ||
4502 | if (p-s > HOST_NAME_MAX) | |
4503 | return false; | |
4504 | ||
4505 | return true; | |
4506 | } | |
4507 | ||
4508 | char* hostname_cleanup(char *s) { | |
4509 | char *p, *d; | |
4510 | ||
4511 | for (p = s, d = s; *p; p++) | |
4512 | if ((*p >= 'a' && *p <= 'z') || | |
4513 | (*p >= 'A' && *p <= 'Z') || | |
4514 | (*p >= '0' && *p <= '9') || | |
4515 | *p == '-' || | |
4516 | *p == '_' || | |
4517 | *p == '.') | |
4518 | *(d++) = *p; | |
4519 | ||
4520 | *d = 0; | |
4521 | ||
4522 | strshorten(s, HOST_NAME_MAX); | |
4523 | return s; | |
4524 | } | |
4525 | ||
1325aa42 LP |
4526 | int pipe_eof(int fd) { |
4527 | struct pollfd pollfd; | |
4528 | int r; | |
4529 | ||
4530 | zero(pollfd); | |
4531 | pollfd.fd = fd; | |
4532 | pollfd.events = POLLIN|POLLHUP; | |
4533 | ||
4534 | r = poll(&pollfd, 1, 0); | |
4535 | if (r < 0) | |
4536 | return -errno; | |
4537 | ||
4538 | if (r == 0) | |
4539 | return 0; | |
4540 | ||
4541 | return pollfd.revents & POLLHUP; | |
4542 | } | |
4543 | ||
5a3ab509 LP |
4544 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4545 | FILE *f; | |
4546 | char *t; | |
4547 | const char *fn; | |
4548 | size_t k; | |
4549 | int fd; | |
4550 | ||
4551 | assert(path); | |
4552 | assert(_f); | |
4553 | assert(_temp_path); | |
4554 | ||
4555 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4556 | if (!t) | |
4557 | return -ENOMEM; | |
4558 | ||
4559 | fn = file_name_from_path(path); | |
4560 | k = fn-path; | |
4561 | memcpy(t, path, k); | |
4562 | t[k] = '.'; | |
4563 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4564 | ||
4565 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4566 | if (fd < 0) { | |
4567 | free(t); | |
4568 | return -errno; | |
4569 | } | |
4570 | ||
4571 | f = fdopen(fd, "we"); | |
4572 | if (!f) { | |
4573 | unlink(t); | |
4574 | free(t); | |
4575 | return -errno; | |
4576 | } | |
4577 | ||
4578 | *_f = f; | |
4579 | *_temp_path = t; | |
4580 | ||
4581 | return 0; | |
4582 | } | |
4583 | ||
6ea832a2 | 4584 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4585 | assert(fd >= 0); |
4586 | ||
6ea832a2 LP |
4587 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4588 | return -errno; | |
4589 | ||
4590 | return 0; | |
4591 | } | |
4592 | ||
4593 | int terminal_vhangup(const char *name) { | |
4594 | int fd, r; | |
4595 | ||
4596 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4597 | if (fd < 0) | |
4598 | return fd; | |
4599 | ||
4600 | r = terminal_vhangup_fd(fd); | |
4601 | close_nointr_nofail(fd); | |
4602 | ||
4603 | return r; | |
4604 | } | |
4605 | ||
4606 | int vt_disallocate(const char *name) { | |
4607 | int fd, r; | |
4608 | unsigned u; | |
6ea832a2 LP |
4609 | |
4610 | /* Deallocate the VT if possible. If not possible | |
4611 | * (i.e. because it is the active one), at least clear it | |
4612 | * entirely (including the scrollback buffer) */ | |
4613 | ||
b83bc4e9 LP |
4614 | if (!startswith(name, "/dev/")) |
4615 | return -EINVAL; | |
4616 | ||
4617 | if (!tty_is_vc(name)) { | |
4618 | /* So this is not a VT. I guess we cannot deallocate | |
4619 | * it then. But let's at least clear the screen */ | |
4620 | ||
4621 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4622 | if (fd < 0) | |
4623 | return fd; | |
4624 | ||
4625 | loop_write(fd, "\033[H\033[2J", 7, false); /* clear screen */ | |
4626 | close_nointr_nofail(fd); | |
4627 | ||
4628 | return 0; | |
4629 | } | |
6ea832a2 LP |
4630 | |
4631 | if (!startswith(name, "/dev/tty")) | |
4632 | return -EINVAL; | |
4633 | ||
4634 | r = safe_atou(name+8, &u); | |
4635 | if (r < 0) | |
4636 | return r; | |
4637 | ||
4638 | if (u <= 0) | |
b83bc4e9 | 4639 | return -EINVAL; |
6ea832a2 | 4640 | |
b83bc4e9 | 4641 | /* Try to deallocate */ |
6ea832a2 LP |
4642 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4643 | if (fd < 0) | |
4644 | return fd; | |
4645 | ||
4646 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4647 | close_nointr_nofail(fd); |
6ea832a2 | 4648 | |
b83bc4e9 LP |
4649 | if (r >= 0) |
4650 | return 0; | |
6ea832a2 | 4651 | |
b83bc4e9 | 4652 | if (errno != EBUSY) |
6ea832a2 | 4653 | return -errno; |
6ea832a2 | 4654 | |
b83bc4e9 LP |
4655 | /* Couldn't deallocate, so let's clear it fully with |
4656 | * scrollback */ | |
4657 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4658 | if (fd < 0) |
b83bc4e9 | 4659 | return fd; |
6ea832a2 | 4660 | |
b83bc4e9 LP |
4661 | /* Requires Linux 2.6.40 */ |
4662 | loop_write(fd, "\033[H\033[3J", 7, false); /* clear screen including scrollback */ | |
4663 | close_nointr_nofail(fd); | |
6ea832a2 | 4664 | |
b83bc4e9 | 4665 | return 0; |
6ea832a2 LP |
4666 | } |
4667 | ||
db1413d7 KS |
4668 | |
4669 | static int file_is_conf(const struct dirent *d, const char *suffix) { | |
4670 | assert(d); | |
4671 | ||
4672 | if (ignore_file(d->d_name)) | |
4673 | return 0; | |
4674 | ||
4675 | if (d->d_type != DT_REG && | |
4676 | d->d_type != DT_LNK && | |
4677 | d->d_type != DT_UNKNOWN) | |
4678 | return 0; | |
4679 | ||
4680 | return endswith(d->d_name, suffix); | |
4681 | } | |
4682 | ||
4683 | static int files_add(Hashmap *h, const char *path, const char *suffix) { | |
4684 | DIR *dir; | |
4685 | struct dirent *de; | |
4686 | int r = 0; | |
4687 | ||
4688 | dir = opendir(path); | |
4689 | if (!dir) { | |
4690 | if (errno == ENOENT) | |
4691 | return 0; | |
4692 | return -errno; | |
4693 | } | |
4694 | ||
4695 | for (de = readdir(dir); de; de = readdir(dir)) { | |
223a3558 | 4696 | char *p, *f; |
db1413d7 KS |
4697 | const char *base; |
4698 | ||
4699 | if (!file_is_conf(de, suffix)) | |
4700 | continue; | |
4701 | ||
223a3558 | 4702 | if (asprintf(&p, "%s/%s", path, de->d_name) < 0) { |
db1413d7 KS |
4703 | r = -ENOMEM; |
4704 | goto finish; | |
4705 | } | |
4706 | ||
223a3558 KS |
4707 | f = canonicalize_file_name(p); |
4708 | if (!f) { | |
4709 | log_error("Failed to canonicalize file name '%s': %m", p); | |
4710 | free(p); | |
4711 | continue; | |
4712 | } | |
4713 | free(p); | |
4714 | ||
db1413d7 KS |
4715 | log_debug("found: %s\n", f); |
4716 | base = f + strlen(path) + 1; | |
4717 | if (hashmap_put(h, base, f) <= 0) | |
4718 | free(f); | |
4719 | } | |
4720 | ||
4721 | finish: | |
4722 | closedir(dir); | |
4723 | return r; | |
4724 | } | |
4725 | ||
4726 | static int base_cmp(const void *a, const void *b) { | |
4727 | const char *s1, *s2; | |
4728 | ||
4729 | s1 = *(char * const *)a; | |
4730 | s2 = *(char * const *)b; | |
4731 | return strcmp(file_name_from_path(s1), file_name_from_path(s2)); | |
4732 | } | |
4733 | ||
44143309 | 4734 | int conf_files_list(char ***strv, const char *suffix, const char *dir, ...) { |
223a3558 KS |
4735 | Hashmap *fh = NULL; |
4736 | char **dirs = NULL; | |
db1413d7 | 4737 | char **files = NULL; |
223a3558 | 4738 | char **p; |
db1413d7 | 4739 | va_list ap; |
44143309 | 4740 | int r = 0; |
db1413d7 | 4741 | |
223a3558 KS |
4742 | va_start(ap, dir); |
4743 | dirs = strv_new_ap(dir, ap); | |
4744 | va_end(ap); | |
4745 | if (!dirs) { | |
4746 | r = -ENOMEM; | |
4747 | goto finish; | |
4748 | } | |
4749 | if (!strv_path_canonicalize(dirs)) { | |
4750 | r = -ENOMEM; | |
4751 | goto finish; | |
4752 | } | |
4753 | if (!strv_uniq(dirs)) { | |
4754 | r = -ENOMEM; | |
4755 | goto finish; | |
4756 | } | |
4757 | ||
db1413d7 KS |
4758 | fh = hashmap_new(string_hash_func, string_compare_func); |
4759 | if (!fh) { | |
44143309 | 4760 | r = -ENOMEM; |
db1413d7 KS |
4761 | goto finish; |
4762 | } | |
4763 | ||
223a3558 KS |
4764 | STRV_FOREACH(p, dirs) { |
4765 | if (files_add(fh, *p, suffix) < 0) { | |
db1413d7 | 4766 | log_error("Failed to search for files."); |
44143309 | 4767 | r = -EINVAL; |
db1413d7 KS |
4768 | goto finish; |
4769 | } | |
db1413d7 | 4770 | } |
db1413d7 KS |
4771 | |
4772 | files = hashmap_get_strv(fh); | |
4773 | if (files == NULL) { | |
4774 | log_error("Failed to compose list of files."); | |
44143309 | 4775 | r = -ENOMEM; |
db1413d7 KS |
4776 | goto finish; |
4777 | } | |
4778 | ||
4779 | qsort(files, hashmap_size(fh), sizeof(char *), base_cmp); | |
8d0e38a2 | 4780 | |
db1413d7 | 4781 | finish: |
223a3558 | 4782 | strv_free(dirs); |
db1413d7 | 4783 | hashmap_free(fh); |
44143309 KS |
4784 | *strv = files; |
4785 | return r; | |
db1413d7 | 4786 | } |
7948c4df KS |
4787 | |
4788 | bool hwclock_is_localtime(void) { | |
4789 | FILE *f; | |
4790 | char line[LINE_MAX]; | |
4791 | bool local = false; | |
4792 | ||
4793 | /* | |
4794 | * The third line of adjtime is "UTC" or "LOCAL" or nothing. | |
4795 | * # /etc/adjtime | |
4796 | * 0.0 0 0.0 | |
4797 | * 0 | |
4798 | * UTC | |
4799 | */ | |
4800 | f = fopen("/etc/adjtime", "re"); | |
4801 | if (f) { | |
4802 | if (fgets(line, sizeof(line), f) && | |
4803 | fgets(line, sizeof(line), f) && | |
4804 | fgets(line, sizeof(line), f) ) { | |
4805 | if (!strcmp(line, "LOCAL\n")) | |
4806 | local = true; | |
4807 | } | |
4808 | fclose(f); | |
4809 | } | |
4810 | return local; | |
4811 | } | |
4812 | ||
4813 | int hwclock_apply_localtime_delta(void) { | |
4814 | const struct timeval *tv_null = NULL; | |
4815 | struct timeval tv; | |
4816 | struct tm *tm; | |
4817 | int minuteswest; | |
4818 | struct timezone tz; | |
4819 | ||
4820 | gettimeofday(&tv, NULL); | |
4821 | tm = localtime(&tv.tv_sec); | |
4822 | minuteswest = tm->tm_gmtoff / 60; | |
4823 | ||
4824 | tz.tz_minuteswest = -minuteswest; | |
4825 | tz.tz_dsttime = 0; /* DST_NONE*/ | |
4826 | ||
4827 | /* | |
4828 | * If the hardware clock does not run in UTC, but in local time: | |
4829 | * The very first time we set the kernel's timezone, it will warp | |
4830 | * the clock so that it runs in UTC instead of local time. | |
4831 | */ | |
4832 | if (settimeofday(tv_null, &tz) < 0) | |
4833 | return -errno; | |
4834 | else | |
4835 | return minuteswest; | |
4836 | } | |
4837 | ||
4838 | int hwclock_get_time(struct tm *tm) { | |
4839 | int fd; | |
4840 | int err = 0; | |
4841 | ||
4842 | fd = open("/dev/rtc0", O_RDONLY|O_CLOEXEC); | |
4843 | if (fd < 0) | |
4844 | return -errno; | |
4845 | if (ioctl(fd, RTC_RD_TIME, tm) < 0) | |
4846 | err = -errno; | |
4847 | close(fd); | |
4848 | ||
4849 | return err; | |
4850 | } | |
4851 | ||
4852 | int hwclock_set_time(const struct tm *tm) { | |
4853 | int fd; | |
4854 | int err = 0; | |
4855 | ||
4856 | fd = open("/dev/rtc0", O_RDONLY|O_CLOEXEC); | |
4857 | if (fd < 0) | |
4858 | return -errno; | |
4859 | if (ioctl(fd, RTC_SET_TIME, tm) < 0) | |
4860 | err = -errno; | |
4861 | close(fd); | |
4862 | ||
4863 | return err; | |
4864 | } | |
f41607a6 | 4865 | |
34ca941c LP |
4866 | int copy_file(const char *from, const char *to) { |
4867 | int r, fdf, fdt; | |
4868 | ||
4869 | assert(from); | |
4870 | assert(to); | |
4871 | ||
4872 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4873 | if (fdf < 0) | |
4874 | return -errno; | |
4875 | ||
4876 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
4877 | if (fdt < 0) { | |
4878 | close_nointr_nofail(fdf); | |
4879 | return -errno; | |
4880 | } | |
4881 | ||
4882 | for (;;) { | |
4883 | char buf[PIPE_BUF]; | |
4884 | ssize_t n, k; | |
4885 | ||
4886 | n = read(fdf, buf, sizeof(buf)); | |
4887 | if (n < 0) { | |
4888 | r = -errno; | |
4889 | ||
4890 | close_nointr_nofail(fdf); | |
4891 | close_nointr(fdt); | |
4892 | unlink(to); | |
4893 | ||
4894 | return r; | |
4895 | } | |
4896 | ||
4897 | if (n == 0) | |
4898 | break; | |
4899 | ||
4900 | errno = 0; | |
4901 | k = loop_write(fdt, buf, n, false); | |
4902 | if (n != k) { | |
4903 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4904 | ||
4905 | close_nointr_nofail(fdf); | |
4906 | close_nointr(fdt); | |
4907 | ||
4908 | unlink(to); | |
4909 | return r; | |
4910 | } | |
4911 | } | |
4912 | ||
4913 | close_nointr_nofail(fdf); | |
4914 | r = close_nointr(fdt); | |
4915 | ||
4916 | if (r < 0) { | |
4917 | unlink(to); | |
4918 | return r; | |
4919 | } | |
4920 | ||
4921 | return 0; | |
4922 | } | |
4923 | ||
4924 | int symlink_or_copy(const char *from, const char *to) { | |
4925 | char *pf = NULL, *pt = NULL; | |
4926 | struct stat a, b; | |
4927 | int r; | |
4928 | ||
4929 | assert(from); | |
4930 | assert(to); | |
4931 | ||
4932 | if (parent_of_path(from, &pf) < 0 || | |
4933 | parent_of_path(to, &pt) < 0) { | |
4934 | r = -ENOMEM; | |
4935 | goto finish; | |
4936 | } | |
4937 | ||
4938 | if (stat(pf, &a) < 0 || | |
4939 | stat(pt, &b) < 0) { | |
4940 | r = -errno; | |
4941 | goto finish; | |
4942 | } | |
4943 | ||
4944 | if (a.st_dev != b.st_dev) { | |
4945 | free(pf); | |
4946 | free(pt); | |
4947 | ||
4948 | return copy_file(from, to); | |
4949 | } | |
4950 | ||
4951 | if (symlink(from, to) < 0) { | |
4952 | r = -errno; | |
4953 | goto finish; | |
4954 | } | |
4955 | ||
4956 | r = 0; | |
4957 | ||
4958 | finish: | |
4959 | free(pf); | |
4960 | free(pt); | |
4961 | ||
4962 | return r; | |
4963 | } | |
4964 | ||
4965 | int symlink_or_copy_atomic(const char *from, const char *to) { | |
4966 | char *t, *x; | |
4967 | const char *fn; | |
4968 | size_t k; | |
4969 | unsigned long long ull; | |
4970 | unsigned i; | |
4971 | int r; | |
4972 | ||
4973 | assert(from); | |
4974 | assert(to); | |
4975 | ||
4976 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4977 | if (!t) | |
4978 | return -ENOMEM; | |
4979 | ||
4980 | fn = file_name_from_path(to); | |
4981 | k = fn-to; | |
4982 | memcpy(t, to, k); | |
4983 | t[k] = '.'; | |
4984 | x = stpcpy(t+k+1, fn); | |
4985 | ||
4986 | ull = random_ull(); | |
4987 | for (i = 0; i < 16; i++) { | |
4988 | *(x++) = hexchar(ull & 0xF); | |
4989 | ull >>= 4; | |
4990 | } | |
4991 | ||
4992 | *x = 0; | |
4993 | ||
4994 | r = symlink_or_copy(from, t); | |
4995 | if (r < 0) { | |
4996 | unlink(t); | |
4997 | free(t); | |
4998 | return r; | |
4999 | } | |
5000 | ||
5001 | if (rename(t, to) < 0) { | |
5002 | r = -errno; | |
5003 | unlink(t); | |
5004 | free(t); | |
5005 | return r; | |
5006 | } | |
5007 | ||
5008 | free(t); | |
5009 | return r; | |
5010 | } | |
5011 | ||
f41607a6 LP |
5012 | static const char *const ioprio_class_table[] = { |
5013 | [IOPRIO_CLASS_NONE] = "none", | |
5014 | [IOPRIO_CLASS_RT] = "realtime", | |
5015 | [IOPRIO_CLASS_BE] = "best-effort", | |
5016 | [IOPRIO_CLASS_IDLE] = "idle" | |
5017 | }; | |
5018 | ||
5019 | DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int); | |
5020 | ||
5021 | static const char *const sigchld_code_table[] = { | |
5022 | [CLD_EXITED] = "exited", | |
5023 | [CLD_KILLED] = "killed", | |
5024 | [CLD_DUMPED] = "dumped", | |
5025 | [CLD_TRAPPED] = "trapped", | |
5026 | [CLD_STOPPED] = "stopped", | |
5027 | [CLD_CONTINUED] = "continued", | |
5028 | }; | |
5029 | ||
5030 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
5031 | ||
5032 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
5033 | [LOG_FAC(LOG_KERN)] = "kern", | |
5034 | [LOG_FAC(LOG_USER)] = "user", | |
5035 | [LOG_FAC(LOG_MAIL)] = "mail", | |
5036 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
5037 | [LOG_FAC(LOG_AUTH)] = "auth", | |
5038 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
5039 | [LOG_FAC(LOG_LPR)] = "lpr", | |
5040 | [LOG_FAC(LOG_NEWS)] = "news", | |
5041 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
5042 | [LOG_FAC(LOG_CRON)] = "cron", | |
5043 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
5044 | [LOG_FAC(LOG_FTP)] = "ftp", | |
5045 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
5046 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
5047 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
5048 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
5049 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
5050 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
5051 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
5052 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
5053 | }; | |
5054 | ||
5055 | DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int); | |
5056 | ||
5057 | static const char *const log_level_table[] = { | |
5058 | [LOG_EMERG] = "emerg", | |
5059 | [LOG_ALERT] = "alert", | |
5060 | [LOG_CRIT] = "crit", | |
5061 | [LOG_ERR] = "err", | |
5062 | [LOG_WARNING] = "warning", | |
5063 | [LOG_NOTICE] = "notice", | |
5064 | [LOG_INFO] = "info", | |
5065 | [LOG_DEBUG] = "debug" | |
5066 | }; | |
5067 | ||
5068 | DEFINE_STRING_TABLE_LOOKUP(log_level, int); | |
5069 | ||
5070 | static const char* const sched_policy_table[] = { | |
5071 | [SCHED_OTHER] = "other", | |
5072 | [SCHED_BATCH] = "batch", | |
5073 | [SCHED_IDLE] = "idle", | |
5074 | [SCHED_FIFO] = "fifo", | |
5075 | [SCHED_RR] = "rr" | |
5076 | }; | |
5077 | ||
5078 | DEFINE_STRING_TABLE_LOOKUP(sched_policy, int); | |
5079 | ||
5080 | static const char* const rlimit_table[] = { | |
5081 | [RLIMIT_CPU] = "LimitCPU", | |
5082 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
5083 | [RLIMIT_DATA] = "LimitDATA", | |
5084 | [RLIMIT_STACK] = "LimitSTACK", | |
5085 | [RLIMIT_CORE] = "LimitCORE", | |
5086 | [RLIMIT_RSS] = "LimitRSS", | |
5087 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
5088 | [RLIMIT_AS] = "LimitAS", | |
5089 | [RLIMIT_NPROC] = "LimitNPROC", | |
5090 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
5091 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
5092 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
5093 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
5094 | [RLIMIT_NICE] = "LimitNICE", | |
5095 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
5096 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
5097 | }; | |
5098 | ||
5099 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
5100 | ||
5101 | static const char* const ip_tos_table[] = { | |
5102 | [IPTOS_LOWDELAY] = "low-delay", | |
5103 | [IPTOS_THROUGHPUT] = "throughput", | |
5104 | [IPTOS_RELIABILITY] = "reliability", | |
5105 | [IPTOS_LOWCOST] = "low-cost", | |
5106 | }; | |
5107 | ||
5108 | DEFINE_STRING_TABLE_LOOKUP(ip_tos, int); | |
5109 | ||
5110 | static const char *const signal_table[] = { | |
5111 | [SIGHUP] = "HUP", | |
5112 | [SIGINT] = "INT", | |
5113 | [SIGQUIT] = "QUIT", | |
5114 | [SIGILL] = "ILL", | |
5115 | [SIGTRAP] = "TRAP", | |
5116 | [SIGABRT] = "ABRT", | |
5117 | [SIGBUS] = "BUS", | |
5118 | [SIGFPE] = "FPE", | |
5119 | [SIGKILL] = "KILL", | |
5120 | [SIGUSR1] = "USR1", | |
5121 | [SIGSEGV] = "SEGV", | |
5122 | [SIGUSR2] = "USR2", | |
5123 | [SIGPIPE] = "PIPE", | |
5124 | [SIGALRM] = "ALRM", | |
5125 | [SIGTERM] = "TERM", | |
5126 | #ifdef SIGSTKFLT | |
5127 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
5128 | #endif | |
5129 | [SIGCHLD] = "CHLD", | |
5130 | [SIGCONT] = "CONT", | |
5131 | [SIGSTOP] = "STOP", | |
5132 | [SIGTSTP] = "TSTP", | |
5133 | [SIGTTIN] = "TTIN", | |
5134 | [SIGTTOU] = "TTOU", | |
5135 | [SIGURG] = "URG", | |
5136 | [SIGXCPU] = "XCPU", | |
5137 | [SIGXFSZ] = "XFSZ", | |
5138 | [SIGVTALRM] = "VTALRM", | |
5139 | [SIGPROF] = "PROF", | |
5140 | [SIGWINCH] = "WINCH", | |
5141 | [SIGIO] = "IO", | |
5142 | [SIGPWR] = "PWR", | |
5143 | [SIGSYS] = "SYS" | |
5144 | }; | |
5145 | ||
5146 | DEFINE_STRING_TABLE_LOOKUP(signal, int); |