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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> | |
8092a428 | 56 | #include <glob.h> |
4b67834e | 57 | #include <grp.h> |
60918275 LP |
58 | |
59 | #include "macro.h" | |
60 | #include "util.h" | |
1dccbe19 LP |
61 | #include "ioprio.h" |
62 | #include "missing.h" | |
a9f5d454 | 63 | #include "log.h" |
65d2ebdc | 64 | #include "strv.h" |
e51bc1a2 | 65 | #include "label.h" |
d06dacd0 | 66 | #include "exit-status.h" |
83cc030f | 67 | #include "hashmap.h" |
56cf987f | 68 | |
9a0e6896 LP |
69 | int saved_argc = 0; |
70 | char **saved_argv = NULL; | |
71 | ||
37f85e66 | 72 | size_t page_size(void) { |
73 | static __thread size_t pgsz = 0; | |
74 | long r; | |
75 | ||
3bfc7184 | 76 | if (_likely_(pgsz)) |
37f85e66 | 77 | return pgsz; |
78 | ||
79 | assert_se((r = sysconf(_SC_PAGESIZE)) > 0); | |
80 | ||
81 | pgsz = (size_t) r; | |
82 | ||
83 | return pgsz; | |
84 | } | |
85 | ||
e05797fb LP |
86 | bool streq_ptr(const char *a, const char *b) { |
87 | ||
88 | /* Like streq(), but tries to make sense of NULL pointers */ | |
89 | ||
90 | if (a && b) | |
91 | return streq(a, b); | |
92 | ||
93 | if (!a && !b) | |
94 | return true; | |
95 | ||
96 | return false; | |
97 | } | |
98 | ||
47be870b | 99 | usec_t now(clockid_t clock_id) { |
60918275 LP |
100 | struct timespec ts; |
101 | ||
47be870b | 102 | assert_se(clock_gettime(clock_id, &ts) == 0); |
60918275 LP |
103 | |
104 | return timespec_load(&ts); | |
105 | } | |
106 | ||
63983207 | 107 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { |
871d7de4 LP |
108 | assert(ts); |
109 | ||
110 | ts->realtime = now(CLOCK_REALTIME); | |
111 | ts->monotonic = now(CLOCK_MONOTONIC); | |
112 | ||
113 | return ts; | |
114 | } | |
115 | ||
a185c5aa LP |
116 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) { |
117 | int64_t delta; | |
118 | assert(ts); | |
119 | ||
120 | ts->realtime = u; | |
121 | ||
122 | if (u == 0) | |
123 | ts->monotonic = 0; | |
124 | else { | |
125 | delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; | |
126 | ||
127 | ts->monotonic = now(CLOCK_MONOTONIC); | |
128 | ||
129 | if ((int64_t) ts->monotonic > delta) | |
130 | ts->monotonic -= delta; | |
131 | else | |
132 | ts->monotonic = 0; | |
133 | } | |
134 | ||
135 | return ts; | |
136 | } | |
137 | ||
60918275 LP |
138 | usec_t timespec_load(const struct timespec *ts) { |
139 | assert(ts); | |
140 | ||
141 | return | |
142 | (usec_t) ts->tv_sec * USEC_PER_SEC + | |
143 | (usec_t) ts->tv_nsec / NSEC_PER_USEC; | |
144 | } | |
145 | ||
146 | struct timespec *timespec_store(struct timespec *ts, usec_t u) { | |
147 | assert(ts); | |
148 | ||
149 | ts->tv_sec = (time_t) (u / USEC_PER_SEC); | |
150 | ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); | |
151 | ||
152 | return ts; | |
153 | } | |
154 | ||
155 | usec_t timeval_load(const struct timeval *tv) { | |
156 | assert(tv); | |
157 | ||
158 | return | |
159 | (usec_t) tv->tv_sec * USEC_PER_SEC + | |
160 | (usec_t) tv->tv_usec; | |
161 | } | |
162 | ||
163 | struct timeval *timeval_store(struct timeval *tv, usec_t u) { | |
164 | assert(tv); | |
165 | ||
166 | tv->tv_sec = (time_t) (u / USEC_PER_SEC); | |
167 | tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); | |
168 | ||
169 | return tv; | |
170 | } | |
171 | ||
172 | bool endswith(const char *s, const char *postfix) { | |
173 | size_t sl, pl; | |
174 | ||
175 | assert(s); | |
176 | assert(postfix); | |
177 | ||
178 | sl = strlen(s); | |
179 | pl = strlen(postfix); | |
180 | ||
d4d0d4db LP |
181 | if (pl == 0) |
182 | return true; | |
183 | ||
60918275 LP |
184 | if (sl < pl) |
185 | return false; | |
186 | ||
187 | return memcmp(s + sl - pl, postfix, pl) == 0; | |
188 | } | |
189 | ||
190 | bool startswith(const char *s, const char *prefix) { | |
191 | size_t sl, pl; | |
192 | ||
193 | assert(s); | |
194 | assert(prefix); | |
195 | ||
196 | sl = strlen(s); | |
197 | pl = strlen(prefix); | |
198 | ||
d4d0d4db LP |
199 | if (pl == 0) |
200 | return true; | |
201 | ||
60918275 LP |
202 | if (sl < pl) |
203 | return false; | |
204 | ||
205 | return memcmp(s, prefix, pl) == 0; | |
206 | } | |
207 | ||
3177a7fa MAP |
208 | bool startswith_no_case(const char *s, const char *prefix) { |
209 | size_t sl, pl; | |
210 | unsigned i; | |
211 | ||
212 | assert(s); | |
213 | assert(prefix); | |
214 | ||
215 | sl = strlen(s); | |
216 | pl = strlen(prefix); | |
217 | ||
218 | if (pl == 0) | |
219 | return true; | |
220 | ||
221 | if (sl < pl) | |
222 | return false; | |
223 | ||
224 | for(i = 0; i < pl; ++i) { | |
225 | if (tolower(s[i]) != tolower(prefix[i])) | |
226 | return false; | |
227 | } | |
228 | ||
229 | return true; | |
230 | } | |
231 | ||
79d6d816 LP |
232 | bool first_word(const char *s, const char *word) { |
233 | size_t sl, wl; | |
234 | ||
235 | assert(s); | |
236 | assert(word); | |
237 | ||
238 | sl = strlen(s); | |
239 | wl = strlen(word); | |
240 | ||
241 | if (sl < wl) | |
242 | return false; | |
243 | ||
d4d0d4db LP |
244 | if (wl == 0) |
245 | return true; | |
246 | ||
79d6d816 LP |
247 | if (memcmp(s, word, wl) != 0) |
248 | return false; | |
249 | ||
d4d0d4db LP |
250 | return s[wl] == 0 || |
251 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
252 | } |
253 | ||
42f4e3c4 | 254 | int close_nointr(int fd) { |
60918275 LP |
255 | assert(fd >= 0); |
256 | ||
257 | for (;;) { | |
258 | int r; | |
259 | ||
48f82119 LP |
260 | r = close(fd); |
261 | if (r >= 0) | |
60918275 LP |
262 | return r; |
263 | ||
264 | if (errno != EINTR) | |
48f82119 | 265 | return -errno; |
60918275 LP |
266 | } |
267 | } | |
85261803 | 268 | |
85f136b5 | 269 | void close_nointr_nofail(int fd) { |
80876c20 | 270 | int saved_errno = errno; |
85f136b5 LP |
271 | |
272 | /* like close_nointr() but cannot fail, and guarantees errno | |
273 | * is unchanged */ | |
274 | ||
275 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
276 | |
277 | errno = saved_errno; | |
85f136b5 LP |
278 | } |
279 | ||
5b6319dc LP |
280 | void close_many(const int fds[], unsigned n_fd) { |
281 | unsigned i; | |
282 | ||
283 | for (i = 0; i < n_fd; i++) | |
284 | close_nointr_nofail(fds[i]); | |
285 | } | |
286 | ||
85261803 LP |
287 | int parse_boolean(const char *v) { |
288 | assert(v); | |
289 | ||
44d8db9e | 290 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on")) |
85261803 | 291 | return 1; |
44d8db9e | 292 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off")) |
85261803 LP |
293 | return 0; |
294 | ||
295 | return -EINVAL; | |
296 | } | |
297 | ||
3ba686c1 | 298 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 299 | unsigned long ul = 0; |
3ba686c1 LP |
300 | pid_t pid; |
301 | int r; | |
302 | ||
303 | assert(s); | |
304 | assert(ret_pid); | |
305 | ||
306 | if ((r = safe_atolu(s, &ul)) < 0) | |
307 | return r; | |
308 | ||
309 | pid = (pid_t) ul; | |
310 | ||
311 | if ((unsigned long) pid != ul) | |
312 | return -ERANGE; | |
313 | ||
314 | if (pid <= 0) | |
315 | return -ERANGE; | |
316 | ||
317 | *ret_pid = pid; | |
318 | return 0; | |
319 | } | |
320 | ||
034a2a52 LP |
321 | int parse_uid(const char *s, uid_t* ret_uid) { |
322 | unsigned long ul = 0; | |
323 | uid_t uid; | |
324 | int r; | |
325 | ||
326 | assert(s); | |
327 | assert(ret_uid); | |
328 | ||
329 | if ((r = safe_atolu(s, &ul)) < 0) | |
330 | return r; | |
331 | ||
332 | uid = (uid_t) ul; | |
333 | ||
334 | if ((unsigned long) uid != ul) | |
335 | return -ERANGE; | |
336 | ||
337 | *ret_uid = uid; | |
338 | return 0; | |
339 | } | |
340 | ||
85261803 LP |
341 | int safe_atou(const char *s, unsigned *ret_u) { |
342 | char *x = NULL; | |
034c6ed7 | 343 | unsigned long l; |
85261803 LP |
344 | |
345 | assert(s); | |
346 | assert(ret_u); | |
347 | ||
348 | errno = 0; | |
349 | l = strtoul(s, &x, 0); | |
350 | ||
351 | if (!x || *x || errno) | |
352 | return errno ? -errno : -EINVAL; | |
353 | ||
034c6ed7 | 354 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
355 | return -ERANGE; |
356 | ||
357 | *ret_u = (unsigned) l; | |
358 | return 0; | |
359 | } | |
360 | ||
361 | int safe_atoi(const char *s, int *ret_i) { | |
362 | char *x = NULL; | |
034c6ed7 | 363 | long l; |
85261803 LP |
364 | |
365 | assert(s); | |
366 | assert(ret_i); | |
367 | ||
368 | errno = 0; | |
369 | l = strtol(s, &x, 0); | |
370 | ||
371 | if (!x || *x || errno) | |
372 | return errno ? -errno : -EINVAL; | |
373 | ||
034c6ed7 | 374 | if ((long) (int) l != l) |
85261803 LP |
375 | return -ERANGE; |
376 | ||
034c6ed7 LP |
377 | *ret_i = (int) l; |
378 | return 0; | |
379 | } | |
380 | ||
034c6ed7 LP |
381 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
382 | char *x = NULL; | |
383 | unsigned long long l; | |
384 | ||
385 | assert(s); | |
386 | assert(ret_llu); | |
387 | ||
388 | errno = 0; | |
389 | l = strtoull(s, &x, 0); | |
390 | ||
391 | if (!x || *x || errno) | |
392 | return errno ? -errno : -EINVAL; | |
393 | ||
394 | *ret_llu = l; | |
395 | return 0; | |
396 | } | |
397 | ||
398 | int safe_atolli(const char *s, long long int *ret_lli) { | |
399 | char *x = NULL; | |
400 | long long l; | |
401 | ||
402 | assert(s); | |
403 | assert(ret_lli); | |
404 | ||
405 | errno = 0; | |
406 | l = strtoll(s, &x, 0); | |
407 | ||
408 | if (!x || *x || errno) | |
409 | return errno ? -errno : -EINVAL; | |
410 | ||
411 | *ret_lli = l; | |
85261803 LP |
412 | return 0; |
413 | } | |
a41e8209 | 414 | |
a41e8209 | 415 | /* Split a string into words. */ |
65d2ebdc | 416 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
417 | char *current; |
418 | ||
419 | current = *state ? *state : (char*) c; | |
420 | ||
421 | if (!*current || *c == 0) | |
422 | return NULL; | |
423 | ||
65d2ebdc LP |
424 | current += strspn(current, separator); |
425 | *l = strcspn(current, separator); | |
82919e3d LP |
426 | *state = current+*l; |
427 | ||
428 | return (char*) current; | |
429 | } | |
430 | ||
034c6ed7 LP |
431 | /* Split a string into words, but consider strings enclosed in '' and |
432 | * "" as words even if they include spaces. */ | |
433 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
434 | char *current, *e; |
435 | bool escaped = false; | |
034c6ed7 LP |
436 | |
437 | current = *state ? *state : (char*) c; | |
438 | ||
439 | if (!*current || *c == 0) | |
440 | return NULL; | |
441 | ||
442 | current += strspn(current, WHITESPACE); | |
443 | ||
444 | if (*current == '\'') { | |
445 | current ++; | |
034c6ed7 | 446 | |
0bab36f2 LP |
447 | for (e = current; *e; e++) { |
448 | if (escaped) | |
449 | escaped = false; | |
450 | else if (*e == '\\') | |
451 | escaped = true; | |
452 | else if (*e == '\'') | |
453 | break; | |
454 | } | |
455 | ||
456 | *l = e-current; | |
457 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
458 | } else if (*current == '\"') { |
459 | current ++; | |
034c6ed7 | 460 | |
0bab36f2 LP |
461 | for (e = current; *e; e++) { |
462 | if (escaped) | |
463 | escaped = false; | |
464 | else if (*e == '\\') | |
465 | escaped = true; | |
466 | else if (*e == '\"') | |
467 | break; | |
468 | } | |
469 | ||
470 | *l = e-current; | |
471 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 472 | } else { |
0bab36f2 LP |
473 | for (e = current; *e; e++) { |
474 | if (escaped) | |
475 | escaped = false; | |
476 | else if (*e == '\\') | |
477 | escaped = true; | |
478 | else if (strchr(WHITESPACE, *e)) | |
479 | break; | |
480 | } | |
481 | *l = e-current; | |
482 | *state = e; | |
034c6ed7 LP |
483 | } |
484 | ||
485 | return (char*) current; | |
486 | } | |
487 | ||
65d2ebdc LP |
488 | char **split_path_and_make_absolute(const char *p) { |
489 | char **l; | |
490 | assert(p); | |
491 | ||
492 | if (!(l = strv_split(p, ":"))) | |
493 | return NULL; | |
494 | ||
495 | if (!strv_path_make_absolute_cwd(l)) { | |
496 | strv_free(l); | |
497 | return NULL; | |
498 | } | |
499 | ||
500 | return l; | |
501 | } | |
502 | ||
034c6ed7 LP |
503 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
504 | int r; | |
505 | FILE *f; | |
20c03b7b | 506 | char fn[PATH_MAX], line[LINE_MAX], *p; |
bb00e604 | 507 | long unsigned ppid; |
034c6ed7 | 508 | |
8480e784 | 509 | assert(pid > 0); |
034c6ed7 LP |
510 | assert(_ppid); |
511 | ||
bb00e604 | 512 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
8480e784 | 513 | char_array_0(fn); |
034c6ed7 | 514 | |
ccaa6149 | 515 | if (!(f = fopen(fn, "re"))) |
034c6ed7 LP |
516 | return -errno; |
517 | ||
518 | if (!(fgets(line, sizeof(line), f))) { | |
519 | r = -errno; | |
520 | fclose(f); | |
521 | return r; | |
522 | } | |
523 | ||
524 | fclose(f); | |
525 | ||
526 | /* Let's skip the pid and comm fields. The latter is enclosed | |
527 | * in () but does not escape any () in its value, so let's | |
528 | * skip over it manually */ | |
529 | ||
530 | if (!(p = strrchr(line, ')'))) | |
531 | return -EIO; | |
532 | ||
533 | p++; | |
534 | ||
535 | if (sscanf(p, " " | |
536 | "%*c " /* state */ | |
bb00e604 | 537 | "%lu ", /* ppid */ |
034c6ed7 LP |
538 | &ppid) != 1) |
539 | return -EIO; | |
540 | ||
bb00e604 | 541 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
542 | return -ERANGE; |
543 | ||
544 | *_ppid = (pid_t) ppid; | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
7640a5de LP |
549 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
550 | int r; | |
551 | FILE *f; | |
552 | char fn[PATH_MAX], line[LINE_MAX], *p; | |
553 | ||
554 | assert(pid > 0); | |
555 | assert(st); | |
556 | ||
557 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); | |
558 | char_array_0(fn); | |
559 | ||
ccaa6149 | 560 | if (!(f = fopen(fn, "re"))) |
7640a5de LP |
561 | return -errno; |
562 | ||
563 | if (!(fgets(line, sizeof(line), f))) { | |
564 | r = -errno; | |
565 | fclose(f); | |
566 | return r; | |
567 | } | |
568 | ||
569 | fclose(f); | |
570 | ||
571 | /* Let's skip the pid and comm fields. The latter is enclosed | |
572 | * in () but does not escape any () in its value, so let's | |
573 | * skip over it manually */ | |
574 | ||
575 | if (!(p = strrchr(line, ')'))) | |
576 | return -EIO; | |
577 | ||
578 | p++; | |
579 | ||
580 | if (sscanf(p, " " | |
581 | "%*c " /* state */ | |
582 | "%*d " /* ppid */ | |
583 | "%*d " /* pgrp */ | |
584 | "%*d " /* session */ | |
585 | "%*d " /* tty_nr */ | |
586 | "%*d " /* tpgid */ | |
587 | "%*u " /* flags */ | |
588 | "%*u " /* minflt */ | |
589 | "%*u " /* cminflt */ | |
590 | "%*u " /* majflt */ | |
591 | "%*u " /* cmajflt */ | |
592 | "%*u " /* utime */ | |
593 | "%*u " /* stime */ | |
594 | "%*d " /* cutime */ | |
595 | "%*d " /* cstime */ | |
596 | "%*d " /* priority */ | |
597 | "%*d " /* nice */ | |
598 | "%*d " /* num_threads */ | |
599 | "%*d " /* itrealvalue */ | |
600 | "%llu " /* starttime */, | |
601 | st) != 1) | |
602 | return -EIO; | |
603 | ||
604 | return 0; | |
605 | } | |
606 | ||
034c6ed7 LP |
607 | int write_one_line_file(const char *fn, const char *line) { |
608 | FILE *f; | |
609 | int r; | |
610 | ||
611 | assert(fn); | |
612 | assert(line); | |
613 | ||
614 | if (!(f = fopen(fn, "we"))) | |
615 | return -errno; | |
616 | ||
34ca941c | 617 | errno = 0; |
034c6ed7 LP |
618 | if (fputs(line, f) < 0) { |
619 | r = -errno; | |
620 | goto finish; | |
621 | } | |
622 | ||
8e1bd70d LP |
623 | if (!endswith(line, "\n")) |
624 | fputc('\n', f); | |
625 | ||
151b190e LP |
626 | fflush(f); |
627 | ||
628 | if (ferror(f)) { | |
629 | if (errno != 0) | |
630 | r = -errno; | |
631 | else | |
632 | r = -EIO; | |
633 | } else | |
634 | r = 0; | |
635 | ||
034c6ed7 LP |
636 | finish: |
637 | fclose(f); | |
638 | return r; | |
639 | } | |
640 | ||
34ca941c LP |
641 | int fchmod_umask(int fd, mode_t m) { |
642 | mode_t u; | |
643 | int r; | |
644 | ||
645 | u = umask(0777); | |
646 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
647 | umask(u); | |
648 | ||
649 | return r; | |
650 | } | |
651 | ||
652 | int write_one_line_file_atomic(const char *fn, const char *line) { | |
653 | FILE *f; | |
654 | int r; | |
655 | char *p; | |
656 | ||
657 | assert(fn); | |
658 | assert(line); | |
659 | ||
660 | r = fopen_temporary(fn, &f, &p); | |
661 | if (r < 0) | |
662 | return r; | |
663 | ||
664 | fchmod_umask(fileno(f), 0644); | |
665 | ||
666 | errno = 0; | |
667 | if (fputs(line, f) < 0) { | |
668 | r = -errno; | |
669 | goto finish; | |
670 | } | |
671 | ||
672 | if (!endswith(line, "\n")) | |
673 | fputc('\n', f); | |
674 | ||
675 | fflush(f); | |
676 | ||
677 | if (ferror(f)) { | |
678 | if (errno != 0) | |
679 | r = -errno; | |
680 | else | |
681 | r = -EIO; | |
682 | } else { | |
683 | if (rename(p, fn) < 0) | |
684 | r = -errno; | |
685 | else | |
686 | r = 0; | |
687 | } | |
688 | ||
689 | finish: | |
690 | if (r < 0) | |
691 | unlink(p); | |
692 | ||
693 | fclose(f); | |
694 | free(p); | |
695 | ||
696 | return r; | |
697 | } | |
698 | ||
034c6ed7 LP |
699 | int read_one_line_file(const char *fn, char **line) { |
700 | FILE *f; | |
701 | int r; | |
97c4a07d | 702 | char t[LINE_MAX], *c; |
034c6ed7 LP |
703 | |
704 | assert(fn); | |
705 | assert(line); | |
706 | ||
707 | if (!(f = fopen(fn, "re"))) | |
708 | return -errno; | |
709 | ||
710 | if (!(fgets(t, sizeof(t), f))) { | |
711 | r = -errno; | |
712 | goto finish; | |
713 | } | |
714 | ||
715 | if (!(c = strdup(t))) { | |
716 | r = -ENOMEM; | |
717 | goto finish; | |
718 | } | |
719 | ||
6f9a471a LP |
720 | truncate_nl(c); |
721 | ||
034c6ed7 LP |
722 | *line = c; |
723 | r = 0; | |
724 | ||
725 | finish: | |
726 | fclose(f); | |
727 | return r; | |
728 | } | |
44d8db9e | 729 | |
34ca941c | 730 | int read_full_file(const char *fn, char **contents, size_t *size) { |
97c4a07d LP |
731 | FILE *f; |
732 | int r; | |
733 | size_t n, l; | |
734 | char *buf = NULL; | |
735 | struct stat st; | |
736 | ||
737 | if (!(f = fopen(fn, "re"))) | |
738 | return -errno; | |
739 | ||
740 | if (fstat(fileno(f), &st) < 0) { | |
741 | r = -errno; | |
742 | goto finish; | |
743 | } | |
744 | ||
34ca941c LP |
745 | /* Safety check */ |
746 | if (st.st_size > 4*1024*1024) { | |
747 | r = -E2BIG; | |
748 | goto finish; | |
749 | } | |
750 | ||
97c4a07d LP |
751 | n = st.st_size > 0 ? st.st_size : LINE_MAX; |
752 | l = 0; | |
753 | ||
754 | for (;;) { | |
755 | char *t; | |
756 | size_t k; | |
757 | ||
758 | if (!(t = realloc(buf, n+1))) { | |
759 | r = -ENOMEM; | |
760 | goto finish; | |
761 | } | |
762 | ||
763 | buf = t; | |
764 | k = fread(buf + l, 1, n - l, f); | |
765 | ||
766 | if (k <= 0) { | |
767 | if (ferror(f)) { | |
768 | r = -errno; | |
769 | goto finish; | |
770 | } | |
771 | ||
772 | break; | |
773 | } | |
774 | ||
775 | l += k; | |
776 | n *= 2; | |
777 | ||
778 | /* Safety check */ | |
779 | if (n > 4*1024*1024) { | |
780 | r = -E2BIG; | |
781 | goto finish; | |
782 | } | |
783 | } | |
784 | ||
785 | if (buf) | |
786 | buf[l] = 0; | |
787 | else if (!(buf = calloc(1, 1))) { | |
788 | r = -errno; | |
789 | goto finish; | |
790 | } | |
791 | ||
792 | *contents = buf; | |
793 | buf = NULL; | |
794 | ||
34ca941c LP |
795 | if (size) |
796 | *size = l; | |
797 | ||
97c4a07d LP |
798 | r = 0; |
799 | ||
800 | finish: | |
801 | fclose(f); | |
802 | free(buf); | |
803 | ||
804 | return r; | |
805 | } | |
806 | ||
807 | int parse_env_file( | |
808 | const char *fname, | |
c899f8c6 | 809 | const char *separator, ...) { |
97c4a07d | 810 | |
ce8a6aa1 | 811 | int r = 0; |
44d91056 | 812 | char *contents = NULL, *p; |
97c4a07d LP |
813 | |
814 | assert(fname); | |
c899f8c6 | 815 | assert(separator); |
97c4a07d | 816 | |
34ca941c | 817 | if ((r = read_full_file(fname, &contents, NULL)) < 0) |
97c4a07d LP |
818 | return r; |
819 | ||
820 | p = contents; | |
821 | for (;;) { | |
822 | const char *key = NULL; | |
823 | ||
c899f8c6 | 824 | p += strspn(p, separator); |
97c4a07d LP |
825 | p += strspn(p, WHITESPACE); |
826 | ||
827 | if (!*p) | |
828 | break; | |
829 | ||
830 | if (!strchr(COMMENTS, *p)) { | |
831 | va_list ap; | |
832 | char **value; | |
833 | ||
c899f8c6 | 834 | va_start(ap, separator); |
97c4a07d LP |
835 | while ((key = va_arg(ap, char *))) { |
836 | size_t n; | |
837 | char *v; | |
838 | ||
839 | value = va_arg(ap, char **); | |
840 | ||
841 | n = strlen(key); | |
842 | if (strncmp(p, key, n) != 0 || | |
843 | p[n] != '=') | |
844 | continue; | |
845 | ||
846 | p += n + 1; | |
c899f8c6 | 847 | n = strcspn(p, separator); |
97c4a07d LP |
848 | |
849 | if (n >= 2 && | |
e7db37dd LP |
850 | strchr(QUOTES, p[0]) && |
851 | p[n-1] == p[0]) | |
97c4a07d LP |
852 | v = strndup(p+1, n-2); |
853 | else | |
854 | v = strndup(p, n); | |
855 | ||
856 | if (!v) { | |
857 | r = -ENOMEM; | |
858 | va_end(ap); | |
859 | goto fail; | |
860 | } | |
861 | ||
dd36de4d KS |
862 | if (v[0] == '\0') { |
863 | /* return empty value strings as NULL */ | |
864 | free(v); | |
865 | v = NULL; | |
866 | } | |
867 | ||
97c4a07d LP |
868 | free(*value); |
869 | *value = v; | |
870 | ||
871 | p += n; | |
ce8a6aa1 LP |
872 | |
873 | r ++; | |
97c4a07d LP |
874 | break; |
875 | } | |
876 | va_end(ap); | |
877 | } | |
878 | ||
879 | if (!key) | |
c899f8c6 | 880 | p += strcspn(p, separator); |
97c4a07d LP |
881 | } |
882 | ||
97c4a07d LP |
883 | fail: |
884 | free(contents); | |
885 | return r; | |
886 | } | |
887 | ||
8c7be95e LP |
888 | int load_env_file( |
889 | const char *fname, | |
890 | char ***rl) { | |
891 | ||
892 | FILE *f; | |
893 | char **m = 0; | |
894 | int r; | |
895 | ||
896 | assert(fname); | |
897 | assert(rl); | |
898 | ||
899 | if (!(f = fopen(fname, "re"))) | |
900 | return -errno; | |
901 | ||
902 | while (!feof(f)) { | |
903 | char l[LINE_MAX], *p, *u; | |
904 | char **t; | |
905 | ||
906 | if (!fgets(l, sizeof(l), f)) { | |
907 | if (feof(f)) | |
908 | break; | |
909 | ||
910 | r = -errno; | |
911 | goto finish; | |
912 | } | |
913 | ||
914 | p = strstrip(l); | |
915 | ||
916 | if (!*p) | |
917 | continue; | |
918 | ||
919 | if (strchr(COMMENTS, *p)) | |
920 | continue; | |
921 | ||
922 | if (!(u = normalize_env_assignment(p))) { | |
923 | log_error("Out of memory"); | |
924 | r = -ENOMEM; | |
925 | goto finish; | |
926 | } | |
927 | ||
928 | t = strv_append(m, u); | |
929 | free(u); | |
930 | ||
931 | if (!t) { | |
932 | log_error("Out of memory"); | |
933 | r = -ENOMEM; | |
934 | goto finish; | |
935 | } | |
936 | ||
937 | strv_free(m); | |
938 | m = t; | |
939 | } | |
940 | ||
941 | r = 0; | |
942 | ||
943 | *rl = m; | |
944 | m = NULL; | |
945 | ||
946 | finish: | |
947 | if (f) | |
948 | fclose(f); | |
949 | ||
950 | strv_free(m); | |
951 | ||
952 | return r; | |
953 | } | |
954 | ||
7640a5de | 955 | int write_env_file(const char *fname, char **l) { |
34ca941c | 956 | char **i, *p; |
7640a5de LP |
957 | FILE *f; |
958 | int r; | |
959 | ||
34ca941c LP |
960 | r = fopen_temporary(fname, &f, &p); |
961 | if (r < 0) | |
962 | return r; | |
7640a5de | 963 | |
34ca941c LP |
964 | fchmod_umask(fileno(f), 0644); |
965 | ||
966 | errno = 0; | |
7640a5de LP |
967 | STRV_FOREACH(i, l) { |
968 | fputs(*i, f); | |
969 | fputc('\n', f); | |
970 | } | |
971 | ||
972 | fflush(f); | |
973 | ||
34ca941c LP |
974 | if (ferror(f)) { |
975 | if (errno != 0) | |
976 | r = -errno; | |
977 | else | |
978 | r = -EIO; | |
979 | } else { | |
980 | if (rename(p, fname) < 0) | |
981 | r = -errno; | |
982 | else | |
983 | r = 0; | |
984 | } | |
985 | ||
986 | if (r < 0) | |
987 | unlink(p); | |
988 | ||
7640a5de | 989 | fclose(f); |
34ca941c | 990 | free(p); |
7640a5de LP |
991 | |
992 | return r; | |
993 | } | |
994 | ||
7072ced8 LP |
995 | char *truncate_nl(char *s) { |
996 | assert(s); | |
997 | ||
998 | s[strcspn(s, NEWLINE)] = 0; | |
999 | return s; | |
1000 | } | |
1001 | ||
1002 | int get_process_name(pid_t pid, char **name) { | |
1003 | char *p; | |
1004 | int r; | |
1005 | ||
1006 | assert(pid >= 1); | |
1007 | assert(name); | |
1008 | ||
bb00e604 | 1009 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) |
7072ced8 LP |
1010 | return -ENOMEM; |
1011 | ||
1012 | r = read_one_line_file(p, name); | |
1013 | free(p); | |
1014 | ||
1015 | if (r < 0) | |
1016 | return r; | |
1017 | ||
7072ced8 LP |
1018 | return 0; |
1019 | } | |
1020 | ||
c59760ee LP |
1021 | int get_process_cmdline(pid_t pid, size_t max_length, char **line) { |
1022 | char *p, *r, *k; | |
1023 | int c; | |
1024 | bool space = false; | |
1025 | size_t left; | |
1026 | FILE *f; | |
1027 | ||
1028 | assert(pid >= 1); | |
1029 | assert(max_length > 0); | |
1030 | assert(line); | |
1031 | ||
1032 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1033 | return -ENOMEM; | |
1034 | ||
ccaa6149 | 1035 | f = fopen(p, "re"); |
c59760ee LP |
1036 | free(p); |
1037 | ||
1038 | if (!f) | |
1039 | return -errno; | |
1040 | ||
1041 | if (!(r = new(char, max_length))) { | |
1042 | fclose(f); | |
1043 | return -ENOMEM; | |
1044 | } | |
1045 | ||
1046 | k = r; | |
1047 | left = max_length; | |
1048 | while ((c = getc(f)) != EOF) { | |
1049 | ||
1050 | if (isprint(c)) { | |
1051 | if (space) { | |
1052 | if (left <= 4) | |
1053 | break; | |
1054 | ||
1055 | *(k++) = ' '; | |
057fbb58 | 1056 | left--; |
c59760ee LP |
1057 | space = false; |
1058 | } | |
1059 | ||
1060 | if (left <= 4) | |
1061 | break; | |
1062 | ||
1063 | *(k++) = (char) c; | |
057fbb58 | 1064 | left--; |
c59760ee LP |
1065 | } else |
1066 | space = true; | |
1067 | } | |
1068 | ||
1069 | if (left <= 4) { | |
1070 | size_t n = MIN(left-1, 3U); | |
1071 | memcpy(k, "...", n); | |
1072 | k[n] = 0; | |
1073 | } else | |
1074 | *k = 0; | |
1075 | ||
1076 | fclose(f); | |
1077 | ||
35d2e7ec LP |
1078 | /* Kernel threads have no argv[] */ |
1079 | if (r[0] == 0) { | |
1080 | char *t; | |
1081 | int h; | |
1082 | ||
1083 | free(r); | |
1084 | ||
1085 | if ((h = get_process_name(pid, &t)) < 0) | |
1086 | return h; | |
1087 | ||
1088 | h = asprintf(&r, "[%s]", t); | |
1089 | free(t); | |
1090 | ||
1091 | if (h < 0) | |
1092 | return -ENOMEM; | |
1093 | } | |
fa776d8e | 1094 | |
c59760ee LP |
1095 | *line = r; |
1096 | return 0; | |
1097 | } | |
1098 | ||
fab56fc5 LP |
1099 | char *strnappend(const char *s, const char *suffix, size_t b) { |
1100 | size_t a; | |
44d8db9e LP |
1101 | char *r; |
1102 | ||
fab56fc5 LP |
1103 | if (!s && !suffix) |
1104 | return strdup(""); | |
1105 | ||
1106 | if (!s) | |
1107 | return strndup(suffix, b); | |
1108 | ||
1109 | if (!suffix) | |
1110 | return strdup(s); | |
1111 | ||
44d8db9e LP |
1112 | assert(s); |
1113 | assert(suffix); | |
1114 | ||
1115 | a = strlen(s); | |
44d8db9e LP |
1116 | |
1117 | if (!(r = new(char, a+b+1))) | |
1118 | return NULL; | |
1119 | ||
1120 | memcpy(r, s, a); | |
1121 | memcpy(r+a, suffix, b); | |
1122 | r[a+b] = 0; | |
1123 | ||
1124 | return r; | |
1125 | } | |
87f0e418 | 1126 | |
fab56fc5 LP |
1127 | char *strappend(const char *s, const char *suffix) { |
1128 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
1129 | } | |
1130 | ||
87f0e418 LP |
1131 | int readlink_malloc(const char *p, char **r) { |
1132 | size_t l = 100; | |
1133 | ||
1134 | assert(p); | |
1135 | assert(r); | |
1136 | ||
1137 | for (;;) { | |
1138 | char *c; | |
1139 | ssize_t n; | |
1140 | ||
1141 | if (!(c = new(char, l))) | |
1142 | return -ENOMEM; | |
1143 | ||
1144 | if ((n = readlink(p, c, l-1)) < 0) { | |
1145 | int ret = -errno; | |
1146 | free(c); | |
1147 | return ret; | |
1148 | } | |
1149 | ||
1150 | if ((size_t) n < l-1) { | |
1151 | c[n] = 0; | |
1152 | *r = c; | |
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | free(c); | |
1157 | l *= 2; | |
1158 | } | |
1159 | } | |
1160 | ||
2c7108c4 LP |
1161 | int readlink_and_make_absolute(const char *p, char **r) { |
1162 | char *target, *k; | |
1163 | int j; | |
1164 | ||
1165 | assert(p); | |
1166 | assert(r); | |
1167 | ||
1168 | if ((j = readlink_malloc(p, &target)) < 0) | |
1169 | return j; | |
1170 | ||
1171 | k = file_in_same_dir(p, target); | |
1172 | free(target); | |
1173 | ||
1174 | if (!k) | |
1175 | return -ENOMEM; | |
1176 | ||
1177 | *r = k; | |
1178 | return 0; | |
1179 | } | |
1180 | ||
83096483 LP |
1181 | int readlink_and_canonicalize(const char *p, char **r) { |
1182 | char *t, *s; | |
1183 | int j; | |
1184 | ||
1185 | assert(p); | |
1186 | assert(r); | |
1187 | ||
1188 | j = readlink_and_make_absolute(p, &t); | |
1189 | if (j < 0) | |
1190 | return j; | |
1191 | ||
1192 | s = canonicalize_file_name(t); | |
1193 | if (s) { | |
1194 | free(t); | |
1195 | *r = s; | |
1196 | } else | |
1197 | *r = t; | |
1198 | ||
1199 | path_kill_slashes(*r); | |
1200 | ||
1201 | return 0; | |
1202 | } | |
1203 | ||
35d2e7ec LP |
1204 | int parent_of_path(const char *path, char **_r) { |
1205 | const char *e, *a = NULL, *b = NULL, *p; | |
1206 | char *r; | |
1207 | bool slash = false; | |
1208 | ||
1209 | assert(path); | |
1210 | assert(_r); | |
1211 | ||
1212 | if (!*path) | |
1213 | return -EINVAL; | |
1214 | ||
1215 | for (e = path; *e; e++) { | |
1216 | ||
1217 | if (!slash && *e == '/') { | |
1218 | a = b; | |
1219 | b = e; | |
1220 | slash = true; | |
1221 | } else if (slash && *e != '/') | |
1222 | slash = false; | |
1223 | } | |
1224 | ||
1225 | if (*(e-1) == '/') | |
1226 | p = a; | |
1227 | else | |
1228 | p = b; | |
1229 | ||
1230 | if (!p) | |
1231 | return -EINVAL; | |
1232 | ||
1233 | if (p == path) | |
1234 | r = strdup("/"); | |
1235 | else | |
1236 | r = strndup(path, p-path); | |
1237 | ||
1238 | if (!r) | |
1239 | return -ENOMEM; | |
1240 | ||
1241 | *_r = r; | |
1242 | return 0; | |
1243 | } | |
1244 | ||
1245 | ||
87f0e418 LP |
1246 | char *file_name_from_path(const char *p) { |
1247 | char *r; | |
1248 | ||
1249 | assert(p); | |
1250 | ||
1251 | if ((r = strrchr(p, '/'))) | |
1252 | return r + 1; | |
1253 | ||
1254 | return (char*) p; | |
1255 | } | |
0301abf4 LP |
1256 | |
1257 | bool path_is_absolute(const char *p) { | |
1258 | assert(p); | |
1259 | ||
1260 | return p[0] == '/'; | |
1261 | } | |
1262 | ||
1263 | bool is_path(const char *p) { | |
1264 | ||
1265 | return !!strchr(p, '/'); | |
1266 | } | |
1267 | ||
1268 | char *path_make_absolute(const char *p, const char *prefix) { | |
0301abf4 LP |
1269 | assert(p); |
1270 | ||
65d2ebdc LP |
1271 | /* Makes every item in the list an absolute path by prepending |
1272 | * the prefix, if specified and necessary */ | |
1273 | ||
0301abf4 LP |
1274 | if (path_is_absolute(p) || !prefix) |
1275 | return strdup(p); | |
1276 | ||
44d91056 | 1277 | return join(prefix, "/", p, NULL); |
0301abf4 | 1278 | } |
2a987ee8 | 1279 | |
65d2ebdc LP |
1280 | char *path_make_absolute_cwd(const char *p) { |
1281 | char *cwd, *r; | |
1282 | ||
1283 | assert(p); | |
1284 | ||
1285 | /* Similar to path_make_absolute(), but prefixes with the | |
1286 | * current working directory. */ | |
1287 | ||
1288 | if (path_is_absolute(p)) | |
1289 | return strdup(p); | |
1290 | ||
1291 | if (!(cwd = get_current_dir_name())) | |
1292 | return NULL; | |
1293 | ||
1294 | r = path_make_absolute(p, cwd); | |
1295 | free(cwd); | |
1296 | ||
1297 | return r; | |
1298 | } | |
1299 | ||
1300 | char **strv_path_make_absolute_cwd(char **l) { | |
1301 | char **s; | |
1302 | ||
1303 | /* Goes through every item in the string list and makes it | |
1304 | * absolute. This works in place and won't rollback any | |
1305 | * changes on failure. */ | |
1306 | ||
1307 | STRV_FOREACH(s, l) { | |
1308 | char *t; | |
1309 | ||
1310 | if (!(t = path_make_absolute_cwd(*s))) | |
1311 | return NULL; | |
1312 | ||
1313 | free(*s); | |
1314 | *s = t; | |
1315 | } | |
1316 | ||
1317 | return l; | |
1318 | } | |
1319 | ||
c3f6d675 LP |
1320 | char **strv_path_canonicalize(char **l) { |
1321 | char **s; | |
1322 | unsigned k = 0; | |
1323 | bool enomem = false; | |
1324 | ||
1325 | if (strv_isempty(l)) | |
1326 | return l; | |
1327 | ||
1328 | /* Goes through every item in the string list and canonicalize | |
1329 | * the path. This works in place and won't rollback any | |
1330 | * changes on failure. */ | |
1331 | ||
1332 | STRV_FOREACH(s, l) { | |
1333 | char *t, *u; | |
1334 | ||
1335 | t = path_make_absolute_cwd(*s); | |
1336 | free(*s); | |
1337 | ||
1338 | if (!t) { | |
1339 | enomem = true; | |
1340 | continue; | |
1341 | } | |
1342 | ||
1343 | errno = 0; | |
1344 | u = canonicalize_file_name(t); | |
1345 | free(t); | |
1346 | ||
1347 | if (!u) { | |
1348 | if (errno == ENOMEM || !errno) | |
1349 | enomem = true; | |
1350 | ||
1351 | continue; | |
1352 | } | |
1353 | ||
1354 | l[k++] = u; | |
1355 | } | |
1356 | ||
1357 | l[k] = NULL; | |
1358 | ||
1359 | if (enomem) | |
1360 | return NULL; | |
1361 | ||
1362 | return l; | |
a9dd2082 LP |
1363 | } |
1364 | ||
1365 | char **strv_path_remove_empty(char **l) { | |
1366 | char **f, **t; | |
1367 | ||
1368 | if (!l) | |
1369 | return NULL; | |
1370 | ||
1371 | for (f = t = l; *f; f++) { | |
1372 | ||
1373 | if (dir_is_empty(*f) > 0) { | |
1374 | free(*f); | |
1375 | continue; | |
1376 | } | |
1377 | ||
1378 | *(t++) = *f; | |
1379 | } | |
1380 | ||
1381 | *t = NULL; | |
1382 | return l; | |
c3f6d675 LP |
1383 | } |
1384 | ||
2a987ee8 LP |
1385 | int reset_all_signal_handlers(void) { |
1386 | int sig; | |
1387 | ||
1388 | for (sig = 1; sig < _NSIG; sig++) { | |
1389 | struct sigaction sa; | |
1390 | ||
1391 | if (sig == SIGKILL || sig == SIGSTOP) | |
1392 | continue; | |
1393 | ||
1394 | zero(sa); | |
1395 | sa.sa_handler = SIG_DFL; | |
431c32bf | 1396 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
1397 | |
1398 | /* On Linux the first two RT signals are reserved by | |
1399 | * glibc, and sigaction() will return EINVAL for them. */ | |
1400 | if ((sigaction(sig, &sa, NULL) < 0)) | |
1401 | if (errno != EINVAL) | |
1402 | return -errno; | |
1403 | } | |
1404 | ||
8e274523 | 1405 | return 0; |
2a987ee8 | 1406 | } |
4a72ff34 LP |
1407 | |
1408 | char *strstrip(char *s) { | |
57a8eca8 | 1409 | char *e; |
4a72ff34 LP |
1410 | |
1411 | /* Drops trailing whitespace. Modifies the string in | |
1412 | * place. Returns pointer to first non-space character */ | |
1413 | ||
1414 | s += strspn(s, WHITESPACE); | |
1415 | ||
57a8eca8 LP |
1416 | for (e = strchr(s, 0); e > s; e --) |
1417 | if (!strchr(WHITESPACE, e[-1])) | |
1418 | break; | |
4a72ff34 | 1419 | |
57a8eca8 | 1420 | *e = 0; |
4a72ff34 LP |
1421 | |
1422 | return s; | |
4a72ff34 LP |
1423 | } |
1424 | ||
ee9b5e01 LP |
1425 | char *delete_chars(char *s, const char *bad) { |
1426 | char *f, *t; | |
1427 | ||
1428 | /* Drops all whitespace, regardless where in the string */ | |
1429 | ||
1430 | for (f = s, t = s; *f; f++) { | |
1431 | if (strchr(bad, *f)) | |
1432 | continue; | |
1433 | ||
1434 | *(t++) = *f; | |
1435 | } | |
1436 | ||
1437 | *t = 0; | |
1438 | ||
1439 | return s; | |
1440 | } | |
1441 | ||
ab1f0633 LP |
1442 | bool in_charset(const char *s, const char* charset) { |
1443 | const char *i; | |
1444 | ||
1445 | assert(s); | |
1446 | assert(charset); | |
1447 | ||
1448 | for (i = s; *i; i++) | |
1449 | if (!strchr(charset, *i)) | |
1450 | return false; | |
1451 | ||
1452 | return true; | |
1453 | } | |
1454 | ||
4a72ff34 LP |
1455 | char *file_in_same_dir(const char *path, const char *filename) { |
1456 | char *e, *r; | |
1457 | size_t k; | |
1458 | ||
1459 | assert(path); | |
1460 | assert(filename); | |
1461 | ||
1462 | /* This removes the last component of path and appends | |
1463 | * filename, unless the latter is absolute anyway or the | |
1464 | * former isn't */ | |
1465 | ||
1466 | if (path_is_absolute(filename)) | |
1467 | return strdup(filename); | |
1468 | ||
1469 | if (!(e = strrchr(path, '/'))) | |
1470 | return strdup(filename); | |
1471 | ||
1472 | k = strlen(filename); | |
1473 | if (!(r = new(char, e-path+1+k+1))) | |
1474 | return NULL; | |
1475 | ||
1476 | memcpy(r, path, e-path+1); | |
1477 | memcpy(r+(e-path)+1, filename, k+1); | |
1478 | ||
1479 | return r; | |
1480 | } | |
fb624d04 | 1481 | |
8c6db833 LP |
1482 | int safe_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
1483 | struct stat st; | |
1484 | ||
56cf987f | 1485 | if (label_mkdir(path, mode) >= 0) |
8c6db833 LP |
1486 | if (chmod_and_chown(path, mode, uid, gid) < 0) |
1487 | return -errno; | |
1488 | ||
1489 | if (lstat(path, &st) < 0) | |
1490 | return -errno; | |
1491 | ||
1492 | if ((st.st_mode & 0777) != mode || | |
1493 | st.st_uid != uid || | |
1494 | st.st_gid != gid || | |
1495 | !S_ISDIR(st.st_mode)) { | |
1496 | errno = EEXIST; | |
1497 | return -errno; | |
1498 | } | |
1499 | ||
1500 | return 0; | |
1501 | } | |
1502 | ||
1503 | ||
a9f5d454 LP |
1504 | int mkdir_parents(const char *path, mode_t mode) { |
1505 | const char *p, *e; | |
1506 | ||
1507 | assert(path); | |
1508 | ||
1509 | /* Creates every parent directory in the path except the last | |
1510 | * component. */ | |
1511 | ||
1512 | p = path + strspn(path, "/"); | |
1513 | for (;;) { | |
1514 | int r; | |
1515 | char *t; | |
1516 | ||
1517 | e = p + strcspn(p, "/"); | |
1518 | p = e + strspn(e, "/"); | |
1519 | ||
1520 | /* Is this the last component? If so, then we're | |
1521 | * done */ | |
1522 | if (*p == 0) | |
1523 | return 0; | |
1524 | ||
1525 | if (!(t = strndup(path, e - path))) | |
1526 | return -ENOMEM; | |
1527 | ||
56cf987f | 1528 | r = label_mkdir(t, mode); |
a9f5d454 LP |
1529 | free(t); |
1530 | ||
1531 | if (r < 0 && errno != EEXIST) | |
1532 | return -errno; | |
1533 | } | |
1534 | } | |
1535 | ||
bbd67135 LP |
1536 | int mkdir_p(const char *path, mode_t mode) { |
1537 | int r; | |
1538 | ||
1539 | /* Like mkdir -p */ | |
1540 | ||
1541 | if ((r = mkdir_parents(path, mode)) < 0) | |
1542 | return r; | |
1543 | ||
56cf987f | 1544 | if (label_mkdir(path, mode) < 0 && errno != EEXIST) |
bbd67135 LP |
1545 | return -errno; |
1546 | ||
1547 | return 0; | |
1548 | } | |
1549 | ||
c32dd69b LP |
1550 | int rmdir_parents(const char *path, const char *stop) { |
1551 | size_t l; | |
1552 | int r = 0; | |
1553 | ||
1554 | assert(path); | |
1555 | assert(stop); | |
1556 | ||
1557 | l = strlen(path); | |
1558 | ||
1559 | /* Skip trailing slashes */ | |
1560 | while (l > 0 && path[l-1] == '/') | |
1561 | l--; | |
1562 | ||
1563 | while (l > 0) { | |
1564 | char *t; | |
1565 | ||
1566 | /* Skip last component */ | |
1567 | while (l > 0 && path[l-1] != '/') | |
1568 | l--; | |
1569 | ||
1570 | /* Skip trailing slashes */ | |
1571 | while (l > 0 && path[l-1] == '/') | |
1572 | l--; | |
1573 | ||
1574 | if (l <= 0) | |
1575 | break; | |
1576 | ||
1577 | if (!(t = strndup(path, l))) | |
1578 | return -ENOMEM; | |
1579 | ||
1580 | if (path_startswith(stop, t)) { | |
1581 | free(t); | |
1582 | return 0; | |
1583 | } | |
1584 | ||
1585 | r = rmdir(t); | |
1586 | free(t); | |
1587 | ||
1588 | if (r < 0) | |
1589 | if (errno != ENOENT) | |
1590 | return -errno; | |
1591 | } | |
1592 | ||
1593 | return 0; | |
1594 | } | |
1595 | ||
1596 | ||
fb624d04 LP |
1597 | char hexchar(int x) { |
1598 | static const char table[16] = "0123456789abcdef"; | |
1599 | ||
1600 | return table[x & 15]; | |
1601 | } | |
4fe88d28 LP |
1602 | |
1603 | int unhexchar(char c) { | |
1604 | ||
1605 | if (c >= '0' && c <= '9') | |
1606 | return c - '0'; | |
1607 | ||
1608 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1609 | return c - 'a' + 10; |
4fe88d28 LP |
1610 | |
1611 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1612 | return c - 'A' + 10; |
4fe88d28 LP |
1613 | |
1614 | return -1; | |
1615 | } | |
1616 | ||
1617 | char octchar(int x) { | |
1618 | return '0' + (x & 7); | |
1619 | } | |
1620 | ||
1621 | int unoctchar(char c) { | |
1622 | ||
1623 | if (c >= '0' && c <= '7') | |
1624 | return c - '0'; | |
1625 | ||
1626 | return -1; | |
1627 | } | |
1628 | ||
5af98f82 LP |
1629 | char decchar(int x) { |
1630 | return '0' + (x % 10); | |
1631 | } | |
1632 | ||
1633 | int undecchar(char c) { | |
1634 | ||
1635 | if (c >= '0' && c <= '9') | |
1636 | return c - '0'; | |
1637 | ||
1638 | return -1; | |
1639 | } | |
1640 | ||
4fe88d28 LP |
1641 | char *cescape(const char *s) { |
1642 | char *r, *t; | |
1643 | const char *f; | |
1644 | ||
1645 | assert(s); | |
1646 | ||
1647 | /* Does C style string escaping. */ | |
1648 | ||
1649 | if (!(r = new(char, strlen(s)*4 + 1))) | |
1650 | return NULL; | |
1651 | ||
1652 | for (f = s, t = r; *f; f++) | |
1653 | ||
1654 | switch (*f) { | |
1655 | ||
1656 | case '\a': | |
1657 | *(t++) = '\\'; | |
1658 | *(t++) = 'a'; | |
1659 | break; | |
1660 | case '\b': | |
1661 | *(t++) = '\\'; | |
1662 | *(t++) = 'b'; | |
1663 | break; | |
1664 | case '\f': | |
1665 | *(t++) = '\\'; | |
1666 | *(t++) = 'f'; | |
1667 | break; | |
1668 | case '\n': | |
1669 | *(t++) = '\\'; | |
1670 | *(t++) = 'n'; | |
1671 | break; | |
1672 | case '\r': | |
1673 | *(t++) = '\\'; | |
1674 | *(t++) = 'r'; | |
1675 | break; | |
1676 | case '\t': | |
1677 | *(t++) = '\\'; | |
1678 | *(t++) = 't'; | |
1679 | break; | |
1680 | case '\v': | |
1681 | *(t++) = '\\'; | |
1682 | *(t++) = 'v'; | |
1683 | break; | |
1684 | case '\\': | |
1685 | *(t++) = '\\'; | |
1686 | *(t++) = '\\'; | |
1687 | break; | |
1688 | case '"': | |
1689 | *(t++) = '\\'; | |
1690 | *(t++) = '"'; | |
1691 | break; | |
1692 | case '\'': | |
1693 | *(t++) = '\\'; | |
1694 | *(t++) = '\''; | |
1695 | break; | |
1696 | ||
1697 | default: | |
1698 | /* For special chars we prefer octal over | |
1699 | * hexadecimal encoding, simply because glib's | |
1700 | * g_strescape() does the same */ | |
1701 | if ((*f < ' ') || (*f >= 127)) { | |
1702 | *(t++) = '\\'; | |
1703 | *(t++) = octchar((unsigned char) *f >> 6); | |
1704 | *(t++) = octchar((unsigned char) *f >> 3); | |
1705 | *(t++) = octchar((unsigned char) *f); | |
1706 | } else | |
1707 | *(t++) = *f; | |
1708 | break; | |
1709 | } | |
1710 | ||
1711 | *t = 0; | |
1712 | ||
1713 | return r; | |
1714 | } | |
1715 | ||
6febfd0d | 1716 | char *cunescape_length(const char *s, size_t length) { |
4fe88d28 LP |
1717 | char *r, *t; |
1718 | const char *f; | |
1719 | ||
1720 | assert(s); | |
1721 | ||
1722 | /* Undoes C style string escaping */ | |
1723 | ||
6febfd0d | 1724 | if (!(r = new(char, length+1))) |
4fe88d28 LP |
1725 | return r; |
1726 | ||
6febfd0d | 1727 | for (f = s, t = r; f < s + length; f++) { |
4fe88d28 LP |
1728 | |
1729 | if (*f != '\\') { | |
1730 | *(t++) = *f; | |
1731 | continue; | |
1732 | } | |
1733 | ||
1734 | f++; | |
1735 | ||
1736 | switch (*f) { | |
1737 | ||
1738 | case 'a': | |
1739 | *(t++) = '\a'; | |
1740 | break; | |
1741 | case 'b': | |
1742 | *(t++) = '\b'; | |
1743 | break; | |
1744 | case 'f': | |
1745 | *(t++) = '\f'; | |
1746 | break; | |
1747 | case 'n': | |
1748 | *(t++) = '\n'; | |
1749 | break; | |
1750 | case 'r': | |
1751 | *(t++) = '\r'; | |
1752 | break; | |
1753 | case 't': | |
1754 | *(t++) = '\t'; | |
1755 | break; | |
1756 | case 'v': | |
1757 | *(t++) = '\v'; | |
1758 | break; | |
1759 | case '\\': | |
1760 | *(t++) = '\\'; | |
1761 | break; | |
1762 | case '"': | |
1763 | *(t++) = '"'; | |
1764 | break; | |
1765 | case '\'': | |
1766 | *(t++) = '\''; | |
1767 | break; | |
1768 | ||
e167fb86 LP |
1769 | case 's': |
1770 | /* This is an extension of the XDG syntax files */ | |
1771 | *(t++) = ' '; | |
1772 | break; | |
1773 | ||
4fe88d28 LP |
1774 | case 'x': { |
1775 | /* hexadecimal encoding */ | |
1776 | int a, b; | |
1777 | ||
1778 | if ((a = unhexchar(f[1])) < 0 || | |
1779 | (b = unhexchar(f[2])) < 0) { | |
1780 | /* Invalid escape code, let's take it literal then */ | |
1781 | *(t++) = '\\'; | |
1782 | *(t++) = 'x'; | |
1783 | } else { | |
1784 | *(t++) = (char) ((a << 4) | b); | |
1785 | f += 2; | |
1786 | } | |
1787 | ||
1788 | break; | |
1789 | } | |
1790 | ||
1791 | case '0': | |
1792 | case '1': | |
1793 | case '2': | |
1794 | case '3': | |
1795 | case '4': | |
1796 | case '5': | |
1797 | case '6': | |
1798 | case '7': { | |
1799 | /* octal encoding */ | |
1800 | int a, b, c; | |
1801 | ||
1802 | if ((a = unoctchar(f[0])) < 0 || | |
1803 | (b = unoctchar(f[1])) < 0 || | |
1804 | (c = unoctchar(f[2])) < 0) { | |
1805 | /* Invalid escape code, let's take it literal then */ | |
1806 | *(t++) = '\\'; | |
1807 | *(t++) = f[0]; | |
1808 | } else { | |
1809 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1810 | f += 2; | |
1811 | } | |
1812 | ||
1813 | break; | |
1814 | } | |
1815 | ||
1816 | case 0: | |
1817 | /* premature end of string.*/ | |
1818 | *(t++) = '\\'; | |
1819 | goto finish; | |
1820 | ||
1821 | default: | |
1822 | /* Invalid escape code, let's take it literal then */ | |
1823 | *(t++) = '\\'; | |
f3d4cc01 | 1824 | *(t++) = *f; |
4fe88d28 LP |
1825 | break; |
1826 | } | |
1827 | } | |
1828 | ||
1829 | finish: | |
1830 | *t = 0; | |
1831 | return r; | |
1832 | } | |
1833 | ||
6febfd0d LP |
1834 | char *cunescape(const char *s) { |
1835 | return cunescape_length(s, strlen(s)); | |
1836 | } | |
4fe88d28 LP |
1837 | |
1838 | char *xescape(const char *s, const char *bad) { | |
1839 | char *r, *t; | |
1840 | const char *f; | |
1841 | ||
1842 | /* Escapes all chars in bad, in addition to \ and all special | |
1843 | * chars, in \xFF style escaping. May be reversed with | |
1844 | * cunescape. */ | |
1845 | ||
1846 | if (!(r = new(char, strlen(s)*4+1))) | |
1847 | return NULL; | |
1848 | ||
1849 | for (f = s, t = r; *f; f++) { | |
1850 | ||
b866264a LP |
1851 | if ((*f < ' ') || (*f >= 127) || |
1852 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1853 | *(t++) = '\\'; |
1854 | *(t++) = 'x'; | |
1855 | *(t++) = hexchar(*f >> 4); | |
1856 | *(t++) = hexchar(*f); | |
1857 | } else | |
1858 | *(t++) = *f; | |
1859 | } | |
1860 | ||
1861 | *t = 0; | |
1862 | ||
1863 | return r; | |
1864 | } | |
1865 | ||
ea430986 | 1866 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1867 | char *r, *t; |
1868 | const char *f; | |
1869 | ||
47be870b LP |
1870 | assert(s); |
1871 | ||
ea430986 LP |
1872 | /* Escapes all chars that D-Bus' object path cannot deal |
1873 | * with. Can be reverse with bus_path_unescape() */ | |
1874 | ||
1875 | if (!(r = new(char, strlen(s)*3+1))) | |
1876 | return NULL; | |
1877 | ||
1878 | for (f = s, t = r; *f; f++) { | |
1879 | ||
1880 | if (!(*f >= 'A' && *f <= 'Z') && | |
1881 | !(*f >= 'a' && *f <= 'z') && | |
1882 | !(*f >= '0' && *f <= '9')) { | |
1883 | *(t++) = '_'; | |
1884 | *(t++) = hexchar(*f >> 4); | |
1885 | *(t++) = hexchar(*f); | |
1886 | } else | |
1887 | *(t++) = *f; | |
1888 | } | |
1889 | ||
1890 | *t = 0; | |
1891 | ||
1892 | return r; | |
1893 | } | |
1894 | ||
9e2f7c11 | 1895 | char *bus_path_unescape(const char *f) { |
ea430986 | 1896 | char *r, *t; |
ea430986 | 1897 | |
9e2f7c11 | 1898 | assert(f); |
47be870b | 1899 | |
9e2f7c11 | 1900 | if (!(r = strdup(f))) |
ea430986 LP |
1901 | return NULL; |
1902 | ||
9e2f7c11 | 1903 | for (t = r; *f; f++) { |
ea430986 LP |
1904 | |
1905 | if (*f == '_') { | |
1906 | int a, b; | |
1907 | ||
1908 | if ((a = unhexchar(f[1])) < 0 || | |
1909 | (b = unhexchar(f[2])) < 0) { | |
1910 | /* Invalid escape code, let's take it literal then */ | |
1911 | *(t++) = '_'; | |
1912 | } else { | |
1913 | *(t++) = (char) ((a << 4) | b); | |
1914 | f += 2; | |
1915 | } | |
1916 | } else | |
1917 | *(t++) = *f; | |
1918 | } | |
1919 | ||
1920 | *t = 0; | |
1921 | ||
1922 | return r; | |
1923 | } | |
1924 | ||
4fe88d28 LP |
1925 | char *path_kill_slashes(char *path) { |
1926 | char *f, *t; | |
1927 | bool slash = false; | |
1928 | ||
1929 | /* Removes redundant inner and trailing slashes. Modifies the | |
1930 | * passed string in-place. | |
1931 | * | |
1932 | * ///foo///bar/ becomes /foo/bar | |
1933 | */ | |
1934 | ||
1935 | for (f = path, t = path; *f; f++) { | |
1936 | ||
1937 | if (*f == '/') { | |
1938 | slash = true; | |
1939 | continue; | |
1940 | } | |
1941 | ||
1942 | if (slash) { | |
1943 | slash = false; | |
1944 | *(t++) = '/'; | |
1945 | } | |
1946 | ||
1947 | *(t++) = *f; | |
1948 | } | |
1949 | ||
1950 | /* Special rule, if we are talking of the root directory, a | |
1951 | trailing slash is good */ | |
1952 | ||
1953 | if (t == path && slash) | |
1954 | *(t++) = '/'; | |
1955 | ||
1956 | *t = 0; | |
1957 | return path; | |
1958 | } | |
1959 | ||
1960 | bool path_startswith(const char *path, const char *prefix) { | |
1961 | assert(path); | |
1962 | assert(prefix); | |
1963 | ||
1964 | if ((path[0] == '/') != (prefix[0] == '/')) | |
1965 | return false; | |
1966 | ||
1967 | for (;;) { | |
1968 | size_t a, b; | |
1969 | ||
1970 | path += strspn(path, "/"); | |
1971 | prefix += strspn(prefix, "/"); | |
1972 | ||
1973 | if (*prefix == 0) | |
1974 | return true; | |
1975 | ||
1976 | if (*path == 0) | |
1977 | return false; | |
1978 | ||
1979 | a = strcspn(path, "/"); | |
1980 | b = strcspn(prefix, "/"); | |
1981 | ||
1982 | if (a != b) | |
1983 | return false; | |
1984 | ||
1985 | if (memcmp(path, prefix, a) != 0) | |
1986 | return false; | |
1987 | ||
1988 | path += a; | |
1989 | prefix += b; | |
1990 | } | |
1991 | } | |
1992 | ||
15ae422b LP |
1993 | bool path_equal(const char *a, const char *b) { |
1994 | assert(a); | |
1995 | assert(b); | |
1996 | ||
1997 | if ((a[0] == '/') != (b[0] == '/')) | |
1998 | return false; | |
1999 | ||
2000 | for (;;) { | |
2001 | size_t j, k; | |
2002 | ||
2003 | a += strspn(a, "/"); | |
2004 | b += strspn(b, "/"); | |
2005 | ||
2006 | if (*a == 0 && *b == 0) | |
2007 | return true; | |
2008 | ||
2009 | if (*a == 0 || *b == 0) | |
2010 | return false; | |
2011 | ||
2012 | j = strcspn(a, "/"); | |
2013 | k = strcspn(b, "/"); | |
2014 | ||
2015 | if (j != k) | |
2016 | return false; | |
2017 | ||
2018 | if (memcmp(a, b, j) != 0) | |
2019 | return false; | |
2020 | ||
2021 | a += j; | |
2022 | b += k; | |
2023 | } | |
2024 | } | |
2025 | ||
67d51650 | 2026 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
2027 | char *p; |
2028 | ||
67d51650 | 2029 | assert(t); |
4fe88d28 | 2030 | |
67d51650 | 2031 | for (p = t; *p; p++) |
4fe88d28 LP |
2032 | if (*p >= 'A' && *p <= 'Z') |
2033 | *p = *p - 'A' + 'a'; | |
2034 | ||
67d51650 | 2035 | return t; |
4fe88d28 | 2036 | } |
1dccbe19 | 2037 | |
c85dc17b LP |
2038 | bool ignore_file(const char *filename) { |
2039 | assert(filename); | |
2040 | ||
2041 | return | |
2042 | filename[0] == '.' || | |
6c78be3c | 2043 | streq(filename, "lost+found") || |
e472d476 LP |
2044 | streq(filename, "aquota.user") || |
2045 | streq(filename, "aquota.group") || | |
c85dc17b LP |
2046 | endswith(filename, "~") || |
2047 | endswith(filename, ".rpmnew") || | |
2048 | endswith(filename, ".rpmsave") || | |
2049 | endswith(filename, ".rpmorig") || | |
2050 | endswith(filename, ".dpkg-old") || | |
2051 | endswith(filename, ".dpkg-new") || | |
2052 | endswith(filename, ".swp"); | |
2053 | } | |
2054 | ||
3a0ecb08 LP |
2055 | int fd_nonblock(int fd, bool nonblock) { |
2056 | int flags; | |
2057 | ||
2058 | assert(fd >= 0); | |
2059 | ||
2060 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
2061 | return -errno; | |
2062 | ||
2063 | if (nonblock) | |
2064 | flags |= O_NONBLOCK; | |
2065 | else | |
2066 | flags &= ~O_NONBLOCK; | |
2067 | ||
2068 | if (fcntl(fd, F_SETFL, flags) < 0) | |
2069 | return -errno; | |
2070 | ||
2071 | return 0; | |
2072 | } | |
2073 | ||
2074 | int fd_cloexec(int fd, bool cloexec) { | |
2075 | int flags; | |
2076 | ||
2077 | assert(fd >= 0); | |
2078 | ||
2079 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
2080 | return -errno; | |
2081 | ||
2082 | if (cloexec) | |
2083 | flags |= FD_CLOEXEC; | |
2084 | else | |
2085 | flags &= ~FD_CLOEXEC; | |
2086 | ||
2087 | if (fcntl(fd, F_SETFD, flags) < 0) | |
2088 | return -errno; | |
2089 | ||
2090 | return 0; | |
2091 | } | |
2092 | ||
a0d40ac5 LP |
2093 | int close_all_fds(const int except[], unsigned n_except) { |
2094 | DIR *d; | |
2095 | struct dirent *de; | |
2096 | int r = 0; | |
2097 | ||
2098 | if (!(d = opendir("/proc/self/fd"))) | |
2099 | return -errno; | |
2100 | ||
2101 | while ((de = readdir(d))) { | |
a7610064 | 2102 | int fd = -1; |
a0d40ac5 | 2103 | |
a16e1123 | 2104 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
2105 | continue; |
2106 | ||
720ce21d LP |
2107 | if (safe_atoi(de->d_name, &fd) < 0) |
2108 | /* Let's better ignore this, just in case */ | |
2109 | continue; | |
a0d40ac5 LP |
2110 | |
2111 | if (fd < 3) | |
2112 | continue; | |
2113 | ||
2114 | if (fd == dirfd(d)) | |
2115 | continue; | |
2116 | ||
2117 | if (except) { | |
2118 | bool found; | |
2119 | unsigned i; | |
2120 | ||
2121 | found = false; | |
2122 | for (i = 0; i < n_except; i++) | |
2123 | if (except[i] == fd) { | |
2124 | found = true; | |
2125 | break; | |
2126 | } | |
2127 | ||
2128 | if (found) | |
2129 | continue; | |
2130 | } | |
2131 | ||
720ce21d | 2132 | if (close_nointr(fd) < 0) { |
2f357920 | 2133 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
2134 | if (errno != EBADF && r == 0) |
2135 | r = -errno; | |
2f357920 | 2136 | } |
a0d40ac5 LP |
2137 | } |
2138 | ||
a0d40ac5 LP |
2139 | closedir(d); |
2140 | return r; | |
2141 | } | |
2142 | ||
db12775d LP |
2143 | bool chars_intersect(const char *a, const char *b) { |
2144 | const char *p; | |
2145 | ||
2146 | /* Returns true if any of the chars in a are in b. */ | |
2147 | for (p = a; *p; p++) | |
2148 | if (strchr(b, *p)) | |
2149 | return true; | |
2150 | ||
2151 | return false; | |
2152 | } | |
2153 | ||
8b6c7120 LP |
2154 | char *format_timestamp(char *buf, size_t l, usec_t t) { |
2155 | struct tm tm; | |
2156 | time_t sec; | |
2157 | ||
2158 | assert(buf); | |
2159 | assert(l > 0); | |
2160 | ||
2161 | if (t <= 0) | |
2162 | return NULL; | |
2163 | ||
f872ec33 | 2164 | sec = (time_t) (t / USEC_PER_SEC); |
8b6c7120 LP |
2165 | |
2166 | if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0) | |
2167 | return NULL; | |
2168 | ||
2169 | return buf; | |
2170 | } | |
2171 | ||
584be568 LP |
2172 | char *format_timestamp_pretty(char *buf, size_t l, usec_t t) { |
2173 | usec_t n, d; | |
2174 | ||
2175 | n = now(CLOCK_REALTIME); | |
2176 | ||
2177 | if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) | |
2178 | return NULL; | |
2179 | ||
2180 | d = n - t; | |
2181 | ||
2182 | if (d >= USEC_PER_YEAR) | |
2183 | snprintf(buf, l, "%llu years and %llu months ago", | |
2184 | (unsigned long long) (d / USEC_PER_YEAR), | |
2185 | (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); | |
2186 | else if (d >= USEC_PER_MONTH) | |
2187 | snprintf(buf, l, "%llu months and %llu days ago", | |
2188 | (unsigned long long) (d / USEC_PER_MONTH), | |
2189 | (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); | |
2190 | else if (d >= USEC_PER_WEEK) | |
2191 | snprintf(buf, l, "%llu weeks and %llu days ago", | |
2192 | (unsigned long long) (d / USEC_PER_WEEK), | |
2193 | (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); | |
2194 | else if (d >= 2*USEC_PER_DAY) | |
2195 | snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); | |
2196 | else if (d >= 25*USEC_PER_HOUR) | |
2197 | snprintf(buf, l, "1 day and %lluh ago", | |
2198 | (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); | |
2199 | else if (d >= 6*USEC_PER_HOUR) | |
2200 | snprintf(buf, l, "%lluh ago", | |
2201 | (unsigned long long) (d / USEC_PER_HOUR)); | |
2202 | else if (d >= USEC_PER_HOUR) | |
2203 | snprintf(buf, l, "%lluh %llumin ago", | |
2204 | (unsigned long long) (d / USEC_PER_HOUR), | |
2205 | (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); | |
2206 | else if (d >= 5*USEC_PER_MINUTE) | |
2207 | snprintf(buf, l, "%llumin ago", | |
2208 | (unsigned long long) (d / USEC_PER_MINUTE)); | |
2209 | else if (d >= USEC_PER_MINUTE) | |
2210 | snprintf(buf, l, "%llumin %llus ago", | |
2211 | (unsigned long long) (d / USEC_PER_MINUTE), | |
2212 | (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); | |
2213 | else if (d >= USEC_PER_SEC) | |
2214 | snprintf(buf, l, "%llus ago", | |
2215 | (unsigned long long) (d / USEC_PER_SEC)); | |
2216 | else if (d >= USEC_PER_MSEC) | |
2217 | snprintf(buf, l, "%llums ago", | |
2218 | (unsigned long long) (d / USEC_PER_MSEC)); | |
2219 | else if (d > 0) | |
2220 | snprintf(buf, l, "%lluus ago", | |
2221 | (unsigned long long) d); | |
2222 | else | |
2223 | snprintf(buf, l, "now"); | |
2224 | ||
2225 | buf[l-1] = 0; | |
2226 | return buf; | |
2227 | } | |
2228 | ||
871d7de4 LP |
2229 | char *format_timespan(char *buf, size_t l, usec_t t) { |
2230 | static const struct { | |
2231 | const char *suffix; | |
2232 | usec_t usec; | |
2233 | } table[] = { | |
2234 | { "w", USEC_PER_WEEK }, | |
2235 | { "d", USEC_PER_DAY }, | |
2236 | { "h", USEC_PER_HOUR }, | |
2237 | { "min", USEC_PER_MINUTE }, | |
2238 | { "s", USEC_PER_SEC }, | |
2239 | { "ms", USEC_PER_MSEC }, | |
2240 | { "us", 1 }, | |
2241 | }; | |
2242 | ||
2243 | unsigned i; | |
2244 | char *p = buf; | |
2245 | ||
2246 | assert(buf); | |
2247 | assert(l > 0); | |
2248 | ||
2249 | if (t == (usec_t) -1) | |
2250 | return NULL; | |
2251 | ||
4502d22c LP |
2252 | if (t == 0) { |
2253 | snprintf(p, l, "0"); | |
2254 | p[l-1] = 0; | |
2255 | return p; | |
2256 | } | |
2257 | ||
871d7de4 LP |
2258 | /* The result of this function can be parsed with parse_usec */ |
2259 | ||
2260 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
2261 | int k; | |
2262 | size_t n; | |
2263 | ||
2264 | if (t < table[i].usec) | |
2265 | continue; | |
2266 | ||
2267 | if (l <= 1) | |
2268 | break; | |
2269 | ||
2270 | k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix); | |
2271 | n = MIN((size_t) k, l); | |
2272 | ||
2273 | l -= n; | |
2274 | p += n; | |
2275 | ||
2276 | t %= table[i].usec; | |
2277 | } | |
2278 | ||
2279 | *p = 0; | |
2280 | ||
2281 | return buf; | |
2282 | } | |
2283 | ||
42856c10 LP |
2284 | bool fstype_is_network(const char *fstype) { |
2285 | static const char * const table[] = { | |
2286 | "cifs", | |
2287 | "smbfs", | |
2288 | "ncpfs", | |
2289 | "nfs", | |
ca139f94 LP |
2290 | "nfs4", |
2291 | "gfs", | |
2292 | "gfs2" | |
42856c10 LP |
2293 | }; |
2294 | ||
2295 | unsigned i; | |
2296 | ||
2297 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2298 | if (streq(table[i], fstype)) | |
2299 | return true; | |
2300 | ||
2301 | return false; | |
2302 | } | |
2303 | ||
601f6a1e LP |
2304 | int chvt(int vt) { |
2305 | int fd, r = 0; | |
2306 | ||
74bc3bdc | 2307 | if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) |
601f6a1e LP |
2308 | return -errno; |
2309 | ||
2310 | if (vt < 0) { | |
2311 | int tiocl[2] = { | |
2312 | TIOCL_GETKMSGREDIRECT, | |
2313 | 0 | |
2314 | }; | |
2315 | ||
2316 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) | |
2317 | return -errno; | |
2318 | ||
2319 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
2320 | } | |
2321 | ||
2322 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
2323 | r = -errno; | |
2324 | ||
a16e1123 | 2325 | close_nointr_nofail(r); |
601f6a1e LP |
2326 | return r; |
2327 | } | |
2328 | ||
80876c20 LP |
2329 | int read_one_char(FILE *f, char *ret, bool *need_nl) { |
2330 | struct termios old_termios, new_termios; | |
2331 | char c; | |
20c03b7b | 2332 | char line[LINE_MAX]; |
80876c20 LP |
2333 | |
2334 | assert(f); | |
2335 | assert(ret); | |
2336 | ||
2337 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
2338 | new_termios = old_termios; | |
2339 | ||
2340 | new_termios.c_lflag &= ~ICANON; | |
2341 | new_termios.c_cc[VMIN] = 1; | |
2342 | new_termios.c_cc[VTIME] = 0; | |
2343 | ||
2344 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
2345 | size_t k; | |
2346 | ||
2347 | k = fread(&c, 1, 1, f); | |
2348 | ||
2349 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2350 | ||
2351 | if (k <= 0) | |
2352 | return -EIO; | |
2353 | ||
2354 | if (need_nl) | |
2355 | *need_nl = c != '\n'; | |
2356 | ||
2357 | *ret = c; | |
2358 | return 0; | |
2359 | } | |
2360 | } | |
2361 | ||
2362 | if (!(fgets(line, sizeof(line), f))) | |
2363 | return -EIO; | |
2364 | ||
2365 | truncate_nl(line); | |
2366 | ||
2367 | if (strlen(line) != 1) | |
2368 | return -EBADMSG; | |
2369 | ||
2370 | if (need_nl) | |
2371 | *need_nl = false; | |
2372 | ||
2373 | *ret = line[0]; | |
2374 | return 0; | |
2375 | } | |
2376 | ||
2377 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 LP |
2378 | bool on_tty; |
2379 | ||
80876c20 LP |
2380 | assert(ret); |
2381 | assert(replies); | |
2382 | assert(text); | |
2383 | ||
1b39d4b9 LP |
2384 | on_tty = isatty(STDOUT_FILENO); |
2385 | ||
80876c20 LP |
2386 | for (;;) { |
2387 | va_list ap; | |
2388 | char c; | |
2389 | int r; | |
2390 | bool need_nl = true; | |
2391 | ||
1b39d4b9 LP |
2392 | if (on_tty) |
2393 | fputs("\x1B[1m", stdout); | |
b1b2dc0c | 2394 | |
80876c20 LP |
2395 | va_start(ap, text); |
2396 | vprintf(text, ap); | |
2397 | va_end(ap); | |
2398 | ||
1b39d4b9 LP |
2399 | if (on_tty) |
2400 | fputs("\x1B[0m", stdout); | |
b1b2dc0c | 2401 | |
80876c20 LP |
2402 | fflush(stdout); |
2403 | ||
2404 | if ((r = read_one_char(stdin, &c, &need_nl)) < 0) { | |
2405 | ||
2406 | if (r == -EBADMSG) { | |
2407 | puts("Bad input, please try again."); | |
2408 | continue; | |
2409 | } | |
2410 | ||
2411 | putchar('\n'); | |
2412 | return r; | |
2413 | } | |
2414 | ||
2415 | if (need_nl) | |
2416 | putchar('\n'); | |
2417 | ||
2418 | if (strchr(replies, c)) { | |
2419 | *ret = c; | |
2420 | return 0; | |
2421 | } | |
2422 | ||
2423 | puts("Read unexpected character, please try again."); | |
2424 | } | |
2425 | } | |
2426 | ||
6ea832a2 | 2427 | int reset_terminal_fd(int fd) { |
80876c20 LP |
2428 | struct termios termios; |
2429 | int r = 0; | |
3fe5e5d4 LP |
2430 | long arg; |
2431 | ||
2432 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
2433 | |
2434 | assert(fd >= 0); | |
2435 | ||
eed1d0e3 LP |
2436 | /* We leave locked terminal attributes untouched, so that |
2437 | * Plymouth may set whatever it wants to set, and we don't | |
2438 | * interfere with that. */ | |
3fe5e5d4 LP |
2439 | |
2440 | /* Disable exclusive mode, just in case */ | |
2441 | ioctl(fd, TIOCNXCL); | |
2442 | ||
2443 | /* Enable console unicode mode */ | |
2444 | arg = K_UNICODE; | |
2445 | ioctl(fd, KDSKBMODE, &arg); | |
80876c20 LP |
2446 | |
2447 | if (tcgetattr(fd, &termios) < 0) { | |
2448 | r = -errno; | |
2449 | goto finish; | |
2450 | } | |
2451 | ||
aaf694ca LP |
2452 | /* We only reset the stuff that matters to the software. How |
2453 | * hardware is set up we don't touch assuming that somebody | |
2454 | * else will do that for us */ | |
2455 | ||
2456 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
2457 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
2458 | termios.c_oflag |= ONLCR; | |
2459 | termios.c_cflag |= CREAD; | |
2460 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
2461 | ||
2462 | termios.c_cc[VINTR] = 03; /* ^C */ | |
2463 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
2464 | termios.c_cc[VERASE] = 0177; | |
2465 | termios.c_cc[VKILL] = 025; /* ^X */ | |
2466 | termios.c_cc[VEOF] = 04; /* ^D */ | |
2467 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
2468 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
2469 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
2470 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
2471 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
2472 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
2473 | termios.c_cc[VEOL] = 0; |
2474 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
2475 | |
2476 | termios.c_cc[VTIME] = 0; | |
2477 | termios.c_cc[VMIN] = 1; | |
2478 | ||
2479 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
2480 | r = -errno; | |
2481 | ||
2482 | finish: | |
2483 | /* Just in case, flush all crap out */ | |
2484 | tcflush(fd, TCIOFLUSH); | |
2485 | ||
2486 | return r; | |
2487 | } | |
2488 | ||
6ea832a2 LP |
2489 | int reset_terminal(const char *name) { |
2490 | int fd, r; | |
2491 | ||
2492 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
2493 | if (fd < 0) | |
2494 | return fd; | |
2495 | ||
2496 | r = reset_terminal_fd(fd); | |
2497 | close_nointr_nofail(fd); | |
2498 | ||
2499 | return r; | |
2500 | } | |
2501 | ||
80876c20 LP |
2502 | int open_terminal(const char *name, int mode) { |
2503 | int fd, r; | |
f73f76ac | 2504 | unsigned c = 0; |
80876c20 | 2505 | |
f73f76ac LP |
2506 | /* |
2507 | * If a TTY is in the process of being closed opening it might | |
2508 | * cause EIO. This is horribly awful, but unlikely to be | |
2509 | * changed in the kernel. Hence we work around this problem by | |
2510 | * retrying a couple of times. | |
2511 | * | |
2512 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
2513 | */ | |
2514 | ||
2515 | for (;;) { | |
2516 | if ((fd = open(name, mode)) >= 0) | |
2517 | break; | |
2518 | ||
2519 | if (errno != EIO) | |
2520 | return -errno; | |
2521 | ||
2522 | if (c >= 20) | |
2523 | return -errno; | |
2524 | ||
2525 | usleep(50 * USEC_PER_MSEC); | |
2526 | c++; | |
2527 | } | |
2528 | ||
2529 | if (fd < 0) | |
80876c20 LP |
2530 | return -errno; |
2531 | ||
2532 | if ((r = isatty(fd)) < 0) { | |
2533 | close_nointr_nofail(fd); | |
2534 | return -errno; | |
2535 | } | |
2536 | ||
2537 | if (!r) { | |
2538 | close_nointr_nofail(fd); | |
2539 | return -ENOTTY; | |
2540 | } | |
2541 | ||
2542 | return fd; | |
2543 | } | |
2544 | ||
2545 | int flush_fd(int fd) { | |
2546 | struct pollfd pollfd; | |
2547 | ||
2548 | zero(pollfd); | |
2549 | pollfd.fd = fd; | |
2550 | pollfd.events = POLLIN; | |
2551 | ||
2552 | for (;;) { | |
20c03b7b | 2553 | char buf[LINE_MAX]; |
80876c20 LP |
2554 | ssize_t l; |
2555 | int r; | |
2556 | ||
2557 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2558 | ||
2559 | if (errno == EINTR) | |
2560 | continue; | |
2561 | ||
2562 | return -errno; | |
2563 | } | |
2564 | ||
2565 | if (r == 0) | |
2566 | return 0; | |
2567 | ||
2568 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2569 | ||
2570 | if (errno == EINTR) | |
2571 | continue; | |
2572 | ||
2573 | if (errno == EAGAIN) | |
2574 | return 0; | |
2575 | ||
2576 | return -errno; | |
2577 | } | |
2578 | ||
2579 | if (l <= 0) | |
2580 | return 0; | |
2581 | } | |
2582 | } | |
2583 | ||
21de3988 | 2584 | int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm) { |
bab45044 | 2585 | int fd = -1, notify = -1, r, wd = -1; |
80876c20 LP |
2586 | |
2587 | assert(name); | |
2588 | ||
2589 | /* We use inotify to be notified when the tty is closed. We | |
2590 | * create the watch before checking if we can actually acquire | |
2591 | * it, so that we don't lose any event. | |
2592 | * | |
2593 | * Note: strictly speaking this actually watches for the | |
2594 | * device being closed, it does *not* really watch whether a | |
2595 | * tty loses its controlling process. However, unless some | |
2596 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2597 | * its tty otherwise this will not become a problem. As long | |
2598 | * as the administrator makes sure not configure any service | |
2599 | * on the same tty as an untrusted user this should not be a | |
2600 | * problem. (Which he probably should not do anyway.) */ | |
2601 | ||
2602 | if (!fail && !force) { | |
2603 | if ((notify = inotify_init1(IN_CLOEXEC)) < 0) { | |
2604 | r = -errno; | |
2605 | goto fail; | |
2606 | } | |
2607 | ||
2608 | if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) { | |
2609 | r = -errno; | |
2610 | goto fail; | |
2611 | } | |
2612 | } | |
2613 | ||
2614 | for (;;) { | |
e3d1855b LP |
2615 | if (notify >= 0) |
2616 | if ((r = flush_fd(notify)) < 0) | |
2617 | goto fail; | |
80876c20 LP |
2618 | |
2619 | /* We pass here O_NOCTTY only so that we can check the return | |
2620 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2621 | * successfully became the controlling process of the tty */ | |
6ea832a2 LP |
2622 | if ((fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) |
2623 | return fd; | |
80876c20 LP |
2624 | |
2625 | /* First, try to get the tty */ | |
21de3988 LP |
2626 | r = ioctl(fd, TIOCSCTTY, force); |
2627 | ||
2628 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2629 | * returning EPERM, i.e. when very likely we already | |
2630 | * are have this controlling terminal. */ | |
2631 | if (r < 0 && errno == EPERM && ignore_tiocstty_eperm) | |
2632 | r = 0; | |
2633 | ||
2634 | if (r < 0 && (force || fail || errno != EPERM)) { | |
80876c20 LP |
2635 | r = -errno; |
2636 | goto fail; | |
2637 | } | |
2638 | ||
2639 | if (r >= 0) | |
2640 | break; | |
2641 | ||
2642 | assert(!fail); | |
2643 | assert(!force); | |
2644 | assert(notify >= 0); | |
2645 | ||
2646 | for (;;) { | |
f601daa7 | 2647 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 2648 | ssize_t l; |
f601daa7 | 2649 | struct inotify_event *e; |
80876c20 | 2650 | |
f601daa7 | 2651 | if ((l = read(notify, &inotify_buffer, sizeof(inotify_buffer))) < 0) { |
80876c20 | 2652 | |
f601daa7 LP |
2653 | if (errno == EINTR) |
2654 | continue; | |
2655 | ||
2656 | r = -errno; | |
2657 | goto fail; | |
2658 | } | |
2659 | ||
2660 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2661 | |
f601daa7 LP |
2662 | while (l > 0) { |
2663 | size_t step; | |
80876c20 | 2664 | |
f601daa7 | 2665 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2666 | r = -EIO; |
f601daa7 LP |
2667 | goto fail; |
2668 | } | |
80876c20 | 2669 | |
f601daa7 LP |
2670 | step = sizeof(struct inotify_event) + e->len; |
2671 | assert(step <= (size_t) l); | |
80876c20 | 2672 | |
f601daa7 LP |
2673 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2674 | l -= step; | |
80876c20 LP |
2675 | } |
2676 | ||
2677 | break; | |
2678 | } | |
2679 | ||
2680 | /* We close the tty fd here since if the old session | |
2681 | * ended our handle will be dead. It's important that | |
2682 | * we do this after sleeping, so that we don't enter | |
2683 | * an endless loop. */ | |
2684 | close_nointr_nofail(fd); | |
2685 | } | |
2686 | ||
2687 | if (notify >= 0) | |
a16e1123 | 2688 | close_nointr_nofail(notify); |
80876c20 | 2689 | |
6ea832a2 | 2690 | if ((r = reset_terminal_fd(fd)) < 0) |
80876c20 LP |
2691 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2692 | ||
2693 | return fd; | |
2694 | ||
2695 | fail: | |
2696 | if (fd >= 0) | |
a16e1123 | 2697 | close_nointr_nofail(fd); |
80876c20 LP |
2698 | |
2699 | if (notify >= 0) | |
a16e1123 | 2700 | close_nointr_nofail(notify); |
80876c20 LP |
2701 | |
2702 | return r; | |
2703 | } | |
2704 | ||
2705 | int release_terminal(void) { | |
2706 | int r = 0, fd; | |
57cd2192 | 2707 | struct sigaction sa_old, sa_new; |
80876c20 | 2708 | |
ccaa6149 | 2709 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0) |
80876c20 LP |
2710 | return -errno; |
2711 | ||
57cd2192 LP |
2712 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2713 | * by our own TIOCNOTTY */ | |
2714 | ||
2715 | zero(sa_new); | |
2716 | sa_new.sa_handler = SIG_IGN; | |
2717 | sa_new.sa_flags = SA_RESTART; | |
2718 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2719 | ||
80876c20 LP |
2720 | if (ioctl(fd, TIOCNOTTY) < 0) |
2721 | r = -errno; | |
2722 | ||
57cd2192 LP |
2723 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2724 | ||
80876c20 LP |
2725 | close_nointr_nofail(fd); |
2726 | return r; | |
2727 | } | |
2728 | ||
9a34ec5f LP |
2729 | int sigaction_many(const struct sigaction *sa, ...) { |
2730 | va_list ap; | |
2731 | int r = 0, sig; | |
2732 | ||
2733 | va_start(ap, sa); | |
2734 | while ((sig = va_arg(ap, int)) > 0) | |
2735 | if (sigaction(sig, sa, NULL) < 0) | |
2736 | r = -errno; | |
2737 | va_end(ap); | |
2738 | ||
2739 | return r; | |
2740 | } | |
2741 | ||
2742 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2743 | struct sigaction sa; |
9a34ec5f LP |
2744 | va_list ap; |
2745 | int r = 0; | |
a337c6fc LP |
2746 | |
2747 | zero(sa); | |
2748 | sa.sa_handler = SIG_IGN; | |
2749 | sa.sa_flags = SA_RESTART; | |
2750 | ||
9a34ec5f LP |
2751 | if (sigaction(sig, &sa, NULL) < 0) |
2752 | r = -errno; | |
2753 | ||
2754 | va_start(ap, sig); | |
2755 | while ((sig = va_arg(ap, int)) > 0) | |
2756 | if (sigaction(sig, &sa, NULL) < 0) | |
2757 | r = -errno; | |
2758 | va_end(ap); | |
2759 | ||
2760 | return r; | |
2761 | } | |
2762 | ||
2763 | int default_signals(int sig, ...) { | |
2764 | struct sigaction sa; | |
2765 | va_list ap; | |
2766 | int r = 0; | |
2767 | ||
2768 | zero(sa); | |
2769 | sa.sa_handler = SIG_DFL; | |
2770 | sa.sa_flags = SA_RESTART; | |
2771 | ||
2772 | if (sigaction(sig, &sa, NULL) < 0) | |
2773 | r = -errno; | |
2774 | ||
2775 | va_start(ap, sig); | |
2776 | while ((sig = va_arg(ap, int)) > 0) | |
2777 | if (sigaction(sig, &sa, NULL) < 0) | |
2778 | r = -errno; | |
2779 | va_end(ap); | |
2780 | ||
2781 | return r; | |
a337c6fc LP |
2782 | } |
2783 | ||
8d567588 LP |
2784 | int close_pipe(int p[]) { |
2785 | int a = 0, b = 0; | |
2786 | ||
2787 | assert(p); | |
2788 | ||
2789 | if (p[0] >= 0) { | |
2790 | a = close_nointr(p[0]); | |
2791 | p[0] = -1; | |
2792 | } | |
2793 | ||
2794 | if (p[1] >= 0) { | |
2795 | b = close_nointr(p[1]); | |
2796 | p[1] = -1; | |
2797 | } | |
2798 | ||
2799 | return a < 0 ? a : b; | |
2800 | } | |
2801 | ||
eb22ac37 | 2802 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2803 | uint8_t *p; |
2804 | ssize_t n = 0; | |
2805 | ||
2806 | assert(fd >= 0); | |
2807 | assert(buf); | |
2808 | ||
2809 | p = buf; | |
2810 | ||
2811 | while (nbytes > 0) { | |
2812 | ssize_t k; | |
2813 | ||
2814 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2815 | ||
eb22ac37 | 2816 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2817 | continue; |
2818 | ||
eb22ac37 | 2819 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2820 | struct pollfd pollfd; |
2821 | ||
2822 | zero(pollfd); | |
2823 | pollfd.fd = fd; | |
2824 | pollfd.events = POLLIN; | |
2825 | ||
2826 | if (poll(&pollfd, 1, -1) < 0) { | |
2827 | if (errno == EINTR) | |
2828 | continue; | |
2829 | ||
2830 | return n > 0 ? n : -errno; | |
2831 | } | |
2832 | ||
2833 | if (pollfd.revents != POLLIN) | |
2834 | return n > 0 ? n : -EIO; | |
2835 | ||
2836 | continue; | |
2837 | } | |
2838 | ||
2839 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2840 | } | |
2841 | ||
2842 | p += k; | |
2843 | nbytes -= k; | |
2844 | n += k; | |
2845 | } | |
2846 | ||
2847 | return n; | |
2848 | } | |
2849 | ||
eb22ac37 LP |
2850 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2851 | const uint8_t *p; | |
2852 | ssize_t n = 0; | |
2853 | ||
2854 | assert(fd >= 0); | |
2855 | assert(buf); | |
2856 | ||
2857 | p = buf; | |
2858 | ||
2859 | while (nbytes > 0) { | |
2860 | ssize_t k; | |
2861 | ||
2862 | if ((k = write(fd, p, nbytes)) <= 0) { | |
2863 | ||
2864 | if (k < 0 && errno == EINTR) | |
2865 | continue; | |
2866 | ||
2867 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2868 | struct pollfd pollfd; | |
2869 | ||
2870 | zero(pollfd); | |
2871 | pollfd.fd = fd; | |
2872 | pollfd.events = POLLOUT; | |
2873 | ||
2874 | if (poll(&pollfd, 1, -1) < 0) { | |
2875 | if (errno == EINTR) | |
2876 | continue; | |
2877 | ||
2878 | return n > 0 ? n : -errno; | |
2879 | } | |
2880 | ||
2881 | if (pollfd.revents != POLLOUT) | |
2882 | return n > 0 ? n : -EIO; | |
2883 | ||
2884 | continue; | |
2885 | } | |
2886 | ||
2887 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2888 | } | |
2889 | ||
2890 | p += k; | |
2891 | nbytes -= k; | |
2892 | n += k; | |
2893 | } | |
2894 | ||
2895 | return n; | |
2896 | } | |
2897 | ||
8d567588 LP |
2898 | int path_is_mount_point(const char *t) { |
2899 | struct stat a, b; | |
35d2e7ec LP |
2900 | char *parent; |
2901 | int r; | |
8d567588 LP |
2902 | |
2903 | if (lstat(t, &a) < 0) { | |
8d567588 LP |
2904 | if (errno == ENOENT) |
2905 | return 0; | |
2906 | ||
2907 | return -errno; | |
2908 | } | |
2909 | ||
35d2e7ec LP |
2910 | if ((r = parent_of_path(t, &parent)) < 0) |
2911 | return r; | |
8d567588 | 2912 | |
35d2e7ec LP |
2913 | r = lstat(parent, &b); |
2914 | free(parent); | |
8d567588 | 2915 | |
35d2e7ec LP |
2916 | if (r < 0) |
2917 | return -errno; | |
8d567588 LP |
2918 | |
2919 | return a.st_dev != b.st_dev; | |
2920 | } | |
2921 | ||
24a6e4a4 LP |
2922 | int parse_usec(const char *t, usec_t *usec) { |
2923 | static const struct { | |
2924 | const char *suffix; | |
2925 | usec_t usec; | |
2926 | } table[] = { | |
2927 | { "sec", USEC_PER_SEC }, | |
2928 | { "s", USEC_PER_SEC }, | |
2929 | { "min", USEC_PER_MINUTE }, | |
2930 | { "hr", USEC_PER_HOUR }, | |
2931 | { "h", USEC_PER_HOUR }, | |
2932 | { "d", USEC_PER_DAY }, | |
2933 | { "w", USEC_PER_WEEK }, | |
2934 | { "msec", USEC_PER_MSEC }, | |
2935 | { "ms", USEC_PER_MSEC }, | |
2936 | { "m", USEC_PER_MINUTE }, | |
2937 | { "usec", 1ULL }, | |
2938 | { "us", 1ULL }, | |
2939 | { "", USEC_PER_SEC }, | |
2940 | }; | |
2941 | ||
2942 | const char *p; | |
2943 | usec_t r = 0; | |
2944 | ||
2945 | assert(t); | |
2946 | assert(usec); | |
2947 | ||
2948 | p = t; | |
2949 | do { | |
2950 | long long l; | |
2951 | char *e; | |
2952 | unsigned i; | |
2953 | ||
2954 | errno = 0; | |
2955 | l = strtoll(p, &e, 10); | |
2956 | ||
2957 | if (errno != 0) | |
2958 | return -errno; | |
2959 | ||
2960 | if (l < 0) | |
2961 | return -ERANGE; | |
2962 | ||
2963 | if (e == p) | |
2964 | return -EINVAL; | |
2965 | ||
2966 | e += strspn(e, WHITESPACE); | |
2967 | ||
2968 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2969 | if (startswith(e, table[i].suffix)) { | |
2970 | r += (usec_t) l * table[i].usec; | |
2971 | p = e + strlen(table[i].suffix); | |
2972 | break; | |
2973 | } | |
2974 | ||
2975 | if (i >= ELEMENTSOF(table)) | |
2976 | return -EINVAL; | |
2977 | ||
2978 | } while (*p != 0); | |
2979 | ||
2980 | *usec = r; | |
2981 | ||
2982 | return 0; | |
2983 | } | |
2984 | ||
ab1f0633 LP |
2985 | int parse_bytes(const char *t, off_t *bytes) { |
2986 | static const struct { | |
2987 | const char *suffix; | |
2988 | off_t factor; | |
2989 | } table[] = { | |
2990 | { "B", 1 }, | |
2991 | { "K", 1024ULL }, | |
2992 | { "M", 1024ULL*1024ULL }, | |
2993 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2994 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
2995 | { "", 1 }, | |
2996 | }; | |
2997 | ||
2998 | const char *p; | |
2999 | off_t r = 0; | |
3000 | ||
3001 | assert(t); | |
3002 | assert(bytes); | |
3003 | ||
3004 | p = t; | |
3005 | do { | |
3006 | long long l; | |
3007 | char *e; | |
3008 | unsigned i; | |
3009 | ||
3010 | errno = 0; | |
3011 | l = strtoll(p, &e, 10); | |
3012 | ||
3013 | if (errno != 0) | |
3014 | return -errno; | |
3015 | ||
3016 | if (l < 0) | |
3017 | return -ERANGE; | |
3018 | ||
3019 | if (e == p) | |
3020 | return -EINVAL; | |
3021 | ||
3022 | e += strspn(e, WHITESPACE); | |
3023 | ||
3024 | for (i = 0; i < ELEMENTSOF(table); i++) | |
3025 | if (startswith(e, table[i].suffix)) { | |
3026 | r += (off_t) l * table[i].factor; | |
3027 | p = e + strlen(table[i].suffix); | |
3028 | break; | |
3029 | } | |
3030 | ||
3031 | if (i >= ELEMENTSOF(table)) | |
3032 | return -EINVAL; | |
3033 | ||
3034 | } while (*p != 0); | |
3035 | ||
3036 | *bytes = r; | |
3037 | ||
3038 | return 0; | |
3039 | } | |
3040 | ||
843d2643 LP |
3041 | int make_stdio(int fd) { |
3042 | int r, s, t; | |
3043 | ||
3044 | assert(fd >= 0); | |
3045 | ||
3046 | r = dup2(fd, STDIN_FILENO); | |
3047 | s = dup2(fd, STDOUT_FILENO); | |
3048 | t = dup2(fd, STDERR_FILENO); | |
3049 | ||
3050 | if (fd >= 3) | |
3051 | close_nointr_nofail(fd); | |
3052 | ||
3053 | if (r < 0 || s < 0 || t < 0) | |
3054 | return -errno; | |
3055 | ||
7862f62d LP |
3056 | fd_cloexec(STDIN_FILENO, false); |
3057 | fd_cloexec(STDOUT_FILENO, false); | |
3058 | fd_cloexec(STDERR_FILENO, false); | |
3059 | ||
843d2643 LP |
3060 | return 0; |
3061 | } | |
3062 | ||
ade509ce LP |
3063 | int make_null_stdio(void) { |
3064 | int null_fd; | |
3065 | ||
3066 | if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) | |
3067 | return -errno; | |
3068 | ||
3069 | return make_stdio(null_fd); | |
3070 | } | |
3071 | ||
8407a5d0 LP |
3072 | bool is_device_path(const char *path) { |
3073 | ||
3074 | /* Returns true on paths that refer to a device, either in | |
3075 | * sysfs or in /dev */ | |
3076 | ||
3077 | return | |
3078 | path_startswith(path, "/dev/") || | |
3079 | path_startswith(path, "/sys/"); | |
3080 | } | |
3081 | ||
01f78473 LP |
3082 | int dir_is_empty(const char *path) { |
3083 | DIR *d; | |
3084 | int r; | |
3085 | struct dirent buf, *de; | |
3086 | ||
3087 | if (!(d = opendir(path))) | |
3088 | return -errno; | |
3089 | ||
3090 | for (;;) { | |
3091 | if ((r = readdir_r(d, &buf, &de)) > 0) { | |
3092 | r = -r; | |
3093 | break; | |
3094 | } | |
3095 | ||
3096 | if (!de) { | |
3097 | r = 1; | |
3098 | break; | |
3099 | } | |
3100 | ||
3101 | if (!ignore_file(de->d_name)) { | |
3102 | r = 0; | |
3103 | break; | |
3104 | } | |
3105 | } | |
3106 | ||
3107 | closedir(d); | |
3108 | return r; | |
3109 | } | |
3110 | ||
d3782d60 LP |
3111 | unsigned long long random_ull(void) { |
3112 | int fd; | |
3113 | uint64_t ull; | |
3114 | ssize_t r; | |
3115 | ||
3116 | if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0) | |
3117 | goto fallback; | |
3118 | ||
eb22ac37 | 3119 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
3120 | close_nointr_nofail(fd); |
3121 | ||
3122 | if (r != sizeof(ull)) | |
3123 | goto fallback; | |
3124 | ||
3125 | return ull; | |
3126 | ||
3127 | fallback: | |
3128 | return random() * RAND_MAX + random(); | |
3129 | } | |
3130 | ||
5b6319dc LP |
3131 | void rename_process(const char name[8]) { |
3132 | assert(name); | |
3133 | ||
3134 | prctl(PR_SET_NAME, name); | |
3135 | ||
3136 | /* This is a like a poor man's setproctitle(). The string | |
3137 | * passed should fit in 7 chars (i.e. the length of | |
3138 | * "systemd") */ | |
3139 | ||
3140 | if (program_invocation_name) | |
3141 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
3142 | |
3143 | if (saved_argc > 0) { | |
3144 | int i; | |
3145 | ||
3146 | if (saved_argv[0]) | |
3147 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
3148 | ||
3149 | for (i = 1; i < saved_argc; i++) { | |
3150 | if (!saved_argv[i]) | |
3151 | break; | |
3152 | ||
3153 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
3154 | } | |
3155 | } | |
5b6319dc LP |
3156 | } |
3157 | ||
7d793605 LP |
3158 | void sigset_add_many(sigset_t *ss, ...) { |
3159 | va_list ap; | |
3160 | int sig; | |
3161 | ||
3162 | assert(ss); | |
3163 | ||
3164 | va_start(ap, ss); | |
3165 | while ((sig = va_arg(ap, int)) > 0) | |
3166 | assert_se(sigaddset(ss, sig) == 0); | |
3167 | va_end(ap); | |
3168 | } | |
3169 | ||
ef2f1067 LP |
3170 | char* gethostname_malloc(void) { |
3171 | struct utsname u; | |
3172 | ||
3173 | assert_se(uname(&u) >= 0); | |
3174 | ||
3175 | if (u.nodename[0]) | |
3176 | return strdup(u.nodename); | |
3177 | ||
3178 | return strdup(u.sysname); | |
3179 | } | |
3180 | ||
3181 | char* getlogname_malloc(void) { | |
3182 | uid_t uid; | |
3183 | long bufsize; | |
3184 | char *buf, *name; | |
3185 | struct passwd pwbuf, *pw = NULL; | |
3186 | struct stat st; | |
3187 | ||
3188 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
3189 | uid = st.st_uid; | |
3190 | else | |
3191 | uid = getuid(); | |
3192 | ||
3193 | /* Shortcut things to avoid NSS lookups */ | |
3194 | if (uid == 0) | |
3195 | return strdup("root"); | |
3196 | ||
3197 | if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0) | |
3198 | bufsize = 4096; | |
3199 | ||
3200 | if (!(buf = malloc(bufsize))) | |
3201 | return NULL; | |
3202 | ||
3203 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) { | |
3204 | name = strdup(pw->pw_name); | |
3205 | free(buf); | |
3206 | return name; | |
3207 | } | |
3208 | ||
3209 | free(buf); | |
3210 | ||
3211 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
3212 | return NULL; | |
3213 | ||
3214 | return name; | |
3215 | } | |
3216 | ||
fc116c6a LP |
3217 | int getttyname_malloc(int fd, char **r) { |
3218 | char path[PATH_MAX], *c; | |
618e02c7 | 3219 | int k; |
8c6db833 LP |
3220 | |
3221 | assert(r); | |
ef2f1067 | 3222 | |
fc116c6a | 3223 | if ((k = ttyname_r(fd, path, sizeof(path))) != 0) |
618e02c7 | 3224 | return -k; |
ef2f1067 LP |
3225 | |
3226 | char_array_0(path); | |
3227 | ||
fc116c6a | 3228 | if (!(c = strdup(startswith(path, "/dev/") ? path + 5 : path))) |
8c6db833 LP |
3229 | return -ENOMEM; |
3230 | ||
3231 | *r = c; | |
3232 | return 0; | |
3233 | } | |
3234 | ||
fc116c6a LP |
3235 | int getttyname_harder(int fd, char **r) { |
3236 | int k; | |
3237 | char *s; | |
3238 | ||
3239 | if ((k = getttyname_malloc(fd, &s)) < 0) | |
3240 | return k; | |
3241 | ||
3242 | if (streq(s, "tty")) { | |
3243 | free(s); | |
4d6d6518 | 3244 | return get_ctty(0, NULL, r); |
fc116c6a LP |
3245 | } |
3246 | ||
3247 | *r = s; | |
3248 | return 0; | |
3249 | } | |
3250 | ||
4d6d6518 | 3251 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
fc116c6a | 3252 | int k; |
4d6d6518 | 3253 | char line[LINE_MAX], *p, *fn; |
fc116c6a LP |
3254 | unsigned long ttynr; |
3255 | FILE *f; | |
3256 | ||
4d6d6518 LP |
3257 | if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0) |
3258 | return -ENOMEM; | |
3259 | ||
3260 | f = fopen(fn, "re"); | |
3261 | free(fn); | |
3262 | if (!f) | |
fc116c6a LP |
3263 | return -errno; |
3264 | ||
4d6d6518 | 3265 | if (!fgets(line, sizeof(line), f)) { |
fc116c6a LP |
3266 | k = -errno; |
3267 | fclose(f); | |
3268 | return k; | |
3269 | } | |
3270 | ||
3271 | fclose(f); | |
3272 | ||
4d6d6518 LP |
3273 | p = strrchr(line, ')'); |
3274 | if (!p) | |
fc116c6a LP |
3275 | return -EIO; |
3276 | ||
3277 | p++; | |
3278 | ||
3279 | if (sscanf(p, " " | |
3280 | "%*c " /* state */ | |
3281 | "%*d " /* ppid */ | |
3282 | "%*d " /* pgrp */ | |
3283 | "%*d " /* session */ | |
3284 | "%lu ", /* ttynr */ | |
3285 | &ttynr) != 1) | |
3286 | return -EIO; | |
3287 | ||
3288 | *d = (dev_t) ttynr; | |
3289 | return 0; | |
3290 | } | |
3291 | ||
4d6d6518 | 3292 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 3293 | int k; |
20c03b7b | 3294 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
3295 | dev_t devnr; |
3296 | ||
3297 | assert(r); | |
3298 | ||
4d6d6518 LP |
3299 | k = get_ctty_devnr(pid, &devnr); |
3300 | if (k < 0) | |
fc116c6a LP |
3301 | return k; |
3302 | ||
3303 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
3304 | char_array_0(fn); | |
3305 | ||
3306 | if ((k = readlink_malloc(fn, &s)) < 0) { | |
3307 | ||
3308 | if (k != -ENOENT) | |
3309 | return k; | |
3310 | ||
46824d0e LP |
3311 | /* This is an ugly hack */ |
3312 | if (major(devnr) == 136) { | |
3313 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
3314 | return -ENOMEM; | |
3315 | ||
3316 | *r = b; | |
3317 | if (_devnr) | |
3318 | *_devnr = devnr; | |
3319 | ||
3320 | return 0; | |
3321 | } | |
3322 | ||
fc116c6a LP |
3323 | /* Probably something like the ptys which have no |
3324 | * symlink in /dev/char. Let's return something | |
3325 | * vaguely useful. */ | |
3326 | ||
3327 | if (!(b = strdup(fn + 5))) | |
3328 | return -ENOMEM; | |
3329 | ||
3330 | *r = b; | |
46824d0e LP |
3331 | if (_devnr) |
3332 | *_devnr = devnr; | |
3333 | ||
fc116c6a LP |
3334 | return 0; |
3335 | } | |
3336 | ||
3337 | if (startswith(s, "/dev/")) | |
3338 | p = s + 5; | |
3339 | else if (startswith(s, "../")) | |
3340 | p = s + 3; | |
3341 | else | |
3342 | p = s; | |
3343 | ||
3344 | b = strdup(p); | |
3345 | free(s); | |
3346 | ||
3347 | if (!b) | |
3348 | return -ENOMEM; | |
3349 | ||
3350 | *r = b; | |
46824d0e LP |
3351 | if (_devnr) |
3352 | *_devnr = devnr; | |
3353 | ||
fc116c6a LP |
3354 | return 0; |
3355 | } | |
3356 | ||
8c6db833 LP |
3357 | static int rm_rf_children(int fd, bool only_dirs) { |
3358 | DIR *d; | |
3359 | int ret = 0; | |
3360 | ||
3361 | assert(fd >= 0); | |
3362 | ||
3363 | /* This returns the first error we run into, but nevertheless | |
3364 | * tries to go on */ | |
3365 | ||
3366 | if (!(d = fdopendir(fd))) { | |
3367 | close_nointr_nofail(fd); | |
4c633005 LP |
3368 | |
3369 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
3370 | } |
3371 | ||
3372 | for (;;) { | |
3373 | struct dirent buf, *de; | |
3374 | bool is_dir; | |
3375 | int r; | |
3376 | ||
3377 | if ((r = readdir_r(d, &buf, &de)) != 0) { | |
3378 | if (ret == 0) | |
3379 | ret = -r; | |
3380 | break; | |
3381 | } | |
3382 | ||
3383 | if (!de) | |
3384 | break; | |
3385 | ||
3386 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
3387 | continue; | |
3388 | ||
3389 | if (de->d_type == DT_UNKNOWN) { | |
3390 | struct stat st; | |
3391 | ||
3392 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { | |
4c633005 | 3393 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3394 | ret = -errno; |
3395 | continue; | |
3396 | } | |
3397 | ||
3398 | is_dir = S_ISDIR(st.st_mode); | |
3399 | } else | |
3400 | is_dir = de->d_type == DT_DIR; | |
3401 | ||
3402 | if (is_dir) { | |
3403 | int subdir_fd; | |
3404 | ||
3405 | if ((subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) { | |
4c633005 | 3406 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3407 | ret = -errno; |
3408 | continue; | |
3409 | } | |
3410 | ||
3411 | if ((r = rm_rf_children(subdir_fd, only_dirs)) < 0) { | |
3412 | if (ret == 0) | |
3413 | ret = r; | |
3414 | } | |
3415 | ||
3416 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
4c633005 | 3417 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3418 | ret = -errno; |
3419 | } | |
3420 | } else if (!only_dirs) { | |
3421 | ||
3422 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3423 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3424 | ret = -errno; |
3425 | } | |
3426 | } | |
3427 | } | |
3428 | ||
3429 | closedir(d); | |
3430 | ||
3431 | return ret; | |
3432 | } | |
3433 | ||
3434 | int rm_rf(const char *path, bool only_dirs, bool delete_root) { | |
3435 | int fd; | |
3436 | int r; | |
3437 | ||
3438 | assert(path); | |
3439 | ||
3440 | if ((fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) { | |
3441 | ||
3442 | if (errno != ENOTDIR) | |
3443 | return -errno; | |
3444 | ||
3445 | if (delete_root && !only_dirs) | |
3446 | if (unlink(path) < 0) | |
3447 | return -errno; | |
3448 | ||
3449 | return 0; | |
3450 | } | |
3451 | ||
3452 | r = rm_rf_children(fd, only_dirs); | |
3453 | ||
3454 | if (delete_root) | |
3455 | if (rmdir(path) < 0) { | |
3456 | if (r == 0) | |
3457 | r = -errno; | |
3458 | } | |
3459 | ||
3460 | return r; | |
3461 | } | |
3462 | ||
3463 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { | |
3464 | assert(path); | |
3465 | ||
3466 | /* Under the assumption that we are running privileged we | |
3467 | * first change the access mode and only then hand out | |
3468 | * ownership to avoid a window where access is too open. */ | |
3469 | ||
3470 | if (chmod(path, mode) < 0) | |
3471 | return -errno; | |
3472 | ||
3473 | if (chown(path, uid, gid) < 0) | |
3474 | return -errno; | |
3475 | ||
3476 | return 0; | |
ef2f1067 LP |
3477 | } |
3478 | ||
82c121a4 LP |
3479 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3480 | cpu_set_t *r; | |
3481 | unsigned n = 1024; | |
3482 | ||
3483 | /* Allocates the cpuset in the right size */ | |
3484 | ||
3485 | for (;;) { | |
3486 | if (!(r = CPU_ALLOC(n))) | |
3487 | return NULL; | |
3488 | ||
3489 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3490 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3491 | ||
3492 | if (ncpus) | |
3493 | *ncpus = n; | |
3494 | ||
3495 | return r; | |
3496 | } | |
3497 | ||
3498 | CPU_FREE(r); | |
3499 | ||
3500 | if (errno != EINVAL) | |
3501 | return NULL; | |
3502 | ||
3503 | n *= 2; | |
3504 | } | |
3505 | } | |
3506 | ||
9e58ff9c LP |
3507 | void status_vprintf(const char *format, va_list ap) { |
3508 | char *s = NULL; | |
3509 | int fd = -1; | |
3510 | ||
3511 | assert(format); | |
3512 | ||
3513 | /* This independent of logging, as status messages are | |
3514 | * optional and go exclusively to the console. */ | |
3515 | ||
3516 | if (vasprintf(&s, format, ap) < 0) | |
3517 | goto finish; | |
3518 | ||
3519 | if ((fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) | |
3520 | goto finish; | |
3521 | ||
3522 | write(fd, s, strlen(s)); | |
3523 | ||
3524 | finish: | |
3525 | free(s); | |
3526 | ||
3527 | if (fd >= 0) | |
3528 | close_nointr_nofail(fd); | |
3529 | } | |
3530 | ||
c846ff47 LP |
3531 | void status_printf(const char *format, ...) { |
3532 | va_list ap; | |
3533 | ||
3534 | assert(format); | |
3535 | ||
3536 | va_start(ap, format); | |
3537 | status_vprintf(format, ap); | |
3538 | va_end(ap); | |
3539 | } | |
3540 | ||
3541 | void status_welcome(void) { | |
10aa7034 LP |
3542 | char *pretty_name = NULL, *ansi_color = NULL; |
3543 | const char *const_pretty = NULL, *const_color = NULL; | |
3544 | int r; | |
c846ff47 | 3545 | |
10aa7034 LP |
3546 | if ((r = parse_env_file("/etc/os-release", NEWLINE, |
3547 | "PRETTY_NAME", &pretty_name, | |
3548 | "ANSI_COLOR", &ansi_color, | |
3549 | NULL)) < 0) { | |
c846ff47 | 3550 | |
10aa7034 LP |
3551 | if (r != -ENOENT) |
3552 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3553 | } | |
c846ff47 | 3554 | |
10aa7034 LP |
3555 | #if defined(TARGET_FEDORA) |
3556 | if (!pretty_name) { | |
3557 | if ((r = read_one_line_file("/etc/system-release", &pretty_name)) < 0) { | |
c846ff47 | 3558 | |
10aa7034 LP |
3559 | if (r != -ENOENT) |
3560 | log_warning("Failed to read /etc/system-release: %s", strerror(-r)); | |
6f9a471a | 3561 | } |
10aa7034 | 3562 | } |
c846ff47 | 3563 | |
10aa7034 | 3564 | if (!ansi_color && pretty_name) { |
c846ff47 | 3565 | |
10aa7034 LP |
3566 | /* This tries to mimic the color magic the old Red Hat sysinit |
3567 | * script did. */ | |
3568 | ||
3569 | if (startswith(pretty_name, "Red Hat")) | |
3570 | const_color = "0;31"; /* Red for RHEL */ | |
3571 | else if (startswith(pretty_name, "Fedora")) | |
3572 | const_color = "0;34"; /* Blue for Fedora */ | |
3573 | } | |
c846ff47 LP |
3574 | |
3575 | #elif defined(TARGET_SUSE) | |
c846ff47 | 3576 | |
10aa7034 LP |
3577 | if (!pretty_name) { |
3578 | if ((r = read_one_line_file("/etc/SuSE-release", &pretty_name)) < 0) { | |
c846ff47 | 3579 | |
10aa7034 LP |
3580 | if (r != -ENOENT) |
3581 | log_warning("Failed to read /etc/SuSE-release: %s", strerror(-r)); | |
6f9a471a | 3582 | } |
10aa7034 | 3583 | } |
c846ff47 | 3584 | |
10aa7034 LP |
3585 | if (!ansi_color) |
3586 | const_color = "0;32"; /* Green for openSUSE */ | |
5a6225fd | 3587 | |
0d37b36b | 3588 | #elif defined(TARGET_GENTOO) |
0d37b36b | 3589 | |
10aa7034 LP |
3590 | if (!pretty_name) { |
3591 | if ((r = read_one_line_file("/etc/gentoo-release", &pretty_name)) < 0) { | |
0d37b36b | 3592 | |
10aa7034 LP |
3593 | if (r != -ENOENT) |
3594 | log_warning("Failed to read /etc/gentoo-release: %s", strerror(-r)); | |
6f9a471a | 3595 | } |
10aa7034 | 3596 | } |
0d37b36b | 3597 | |
10aa7034 LP |
3598 | if (!ansi_color) |
3599 | const_color = "1;34"; /* Light Blue for Gentoo */ | |
5a6225fd | 3600 | |
a338bab5 AS |
3601 | #elif defined(TARGET_ALTLINUX) |
3602 | ||
3603 | if (!pretty_name) { | |
3604 | if ((r = read_one_line_file("/etc/altlinux-release", &pretty_name)) < 0) { | |
3605 | ||
3606 | if (r != -ENOENT) | |
3607 | log_warning("Failed to read /etc/altlinux-release: %s", strerror(-r)); | |
6f9a471a | 3608 | } |
a338bab5 AS |
3609 | } |
3610 | ||
3611 | if (!ansi_color) | |
3612 | const_color = "0;36"; /* Cyan for ALTLinux */ | |
3613 | ||
3614 | ||
5a6225fd | 3615 | #elif defined(TARGET_DEBIAN) |
5a6225fd | 3616 | |
10aa7034 | 3617 | if (!pretty_name) { |
22927a36 | 3618 | char *version; |
c8bffa43 | 3619 | |
22927a36 | 3620 | if ((r = read_one_line_file("/etc/debian_version", &version)) < 0) { |
5a6225fd | 3621 | |
10aa7034 LP |
3622 | if (r != -ENOENT) |
3623 | log_warning("Failed to read /etc/debian_version: %s", strerror(-r)); | |
22927a36 | 3624 | } else { |
22927a36 MB |
3625 | pretty_name = strappend("Debian ", version); |
3626 | free(version); | |
c8bffa43 LP |
3627 | |
3628 | if (!pretty_name) | |
3629 | log_warning("Failed to allocate Debian version string."); | |
22927a36 | 3630 | } |
10aa7034 | 3631 | } |
5a6225fd | 3632 | |
10aa7034 LP |
3633 | if (!ansi_color) |
3634 | const_color = "1;31"; /* Light Red for Debian */ | |
5a6225fd | 3635 | |
274914f9 | 3636 | #elif defined(TARGET_UBUNTU) |
10aa7034 LP |
3637 | |
3638 | if ((r = parse_env_file("/etc/lsb-release", NEWLINE, | |
3639 | "DISTRIB_DESCRIPTION", &pretty_name, | |
3640 | NULL)) < 0) { | |
3641 | ||
3642 | if (r != -ENOENT) | |
3643 | log_warning("Failed to read /etc/lsb-release: %s", strerror(-r)); | |
3644 | } | |
3645 | ||
3646 | if (!ansi_color) | |
3647 | const_color = "0;33"; /* Orange/Brown for Ubuntu */ | |
3648 | ||
1de4d79b AB |
3649 | #elif defined(TARGET_MANDRIVA) |
3650 | ||
3651 | if (!pretty_name) { | |
3652 | char *s, *p; | |
3653 | ||
3654 | if ((r = read_one_line_file("/etc/mandriva-release", &s) < 0)) { | |
3655 | if (r != -ENOENT) | |
3656 | log_warning("Failed to read /etc/mandriva-release: %s", strerror(-r)); | |
3657 | } else { | |
3658 | p = strstr(s, " release "); | |
3659 | if (p) { | |
3660 | *p = '\0'; | |
3661 | p += 9; | |
3662 | p[strcspn(p, " ")] = '\0'; | |
3663 | ||
3664 | /* This corresponds to standard rc.sysinit */ | |
3665 | if (asprintf(&pretty_name, "%s\x1B[0;39m %s", s, p) > 0) | |
3666 | const_color = "1;36"; | |
3667 | else | |
3668 | log_warning("Failed to allocate Mandriva version string."); | |
3669 | } else | |
3670 | log_warning("Failed to parse /etc/mandriva-release"); | |
3671 | free(s); | |
3672 | } | |
3673 | } | |
54e4fdef | 3674 | #elif defined(TARGET_MEEGO) |
1de4d79b | 3675 | |
54e4fdef CF |
3676 | if (!pretty_name) { |
3677 | if ((r = read_one_line_file("/etc/meego-release", &pretty_name)) < 0) { | |
3678 | ||
3679 | if (r != -ENOENT) | |
3680 | log_warning("Failed to read /etc/meego-release: %s", strerror(-r)); | |
3681 | } | |
3682 | } | |
3683 | ||
3684 | if (!ansi_color) | |
3685 | const_color = "1;35"; /* Bright Magenta for MeeGo */ | |
c846ff47 | 3686 | #endif |
10aa7034 LP |
3687 | |
3688 | if (!pretty_name && !const_pretty) | |
3689 | const_pretty = "Linux"; | |
3690 | ||
3691 | if (!ansi_color && !const_color) | |
3692 | const_color = "1"; | |
3693 | ||
da71f23c | 3694 | status_printf("\nWelcome to \x1B[%sm%s\x1B[0m!\n\n", |
10aa7034 LP |
3695 | const_color ? const_color : ansi_color, |
3696 | const_pretty ? const_pretty : pretty_name); | |
86a3475b LP |
3697 | |
3698 | free(ansi_color); | |
3699 | free(pretty_name); | |
c846ff47 LP |
3700 | } |
3701 | ||
fab56fc5 LP |
3702 | char *replace_env(const char *format, char **env) { |
3703 | enum { | |
3704 | WORD, | |
c24eb49e | 3705 | CURLY, |
fab56fc5 LP |
3706 | VARIABLE |
3707 | } state = WORD; | |
3708 | ||
3709 | const char *e, *word = format; | |
3710 | char *r = NULL, *k; | |
3711 | ||
3712 | assert(format); | |
3713 | ||
3714 | for (e = format; *e; e ++) { | |
3715 | ||
3716 | switch (state) { | |
3717 | ||
3718 | case WORD: | |
3719 | if (*e == '$') | |
c24eb49e | 3720 | state = CURLY; |
fab56fc5 LP |
3721 | break; |
3722 | ||
c24eb49e LP |
3723 | case CURLY: |
3724 | if (*e == '{') { | |
fab56fc5 LP |
3725 | if (!(k = strnappend(r, word, e-word-1))) |
3726 | goto fail; | |
3727 | ||
3728 | free(r); | |
3729 | r = k; | |
3730 | ||
3731 | word = e-1; | |
3732 | state = VARIABLE; | |
3733 | ||
3734 | } else if (*e == '$') { | |
3735 | if (!(k = strnappend(r, word, e-word))) | |
3736 | goto fail; | |
3737 | ||
3738 | free(r); | |
3739 | r = k; | |
3740 | ||
3741 | word = e+1; | |
3742 | state = WORD; | |
3743 | } else | |
3744 | state = WORD; | |
3745 | break; | |
3746 | ||
3747 | case VARIABLE: | |
c24eb49e | 3748 | if (*e == '}') { |
b95cf362 | 3749 | const char *t; |
fab56fc5 | 3750 | |
b95cf362 LP |
3751 | if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) |
3752 | t = ""; | |
fab56fc5 | 3753 | |
b95cf362 LP |
3754 | if (!(k = strappend(r, t))) |
3755 | goto fail; | |
fab56fc5 | 3756 | |
b95cf362 LP |
3757 | free(r); |
3758 | r = k; | |
fab56fc5 | 3759 | |
b95cf362 | 3760 | word = e+1; |
fab56fc5 LP |
3761 | state = WORD; |
3762 | } | |
3763 | break; | |
3764 | } | |
3765 | } | |
3766 | ||
3767 | if (!(k = strnappend(r, word, e-word))) | |
3768 | goto fail; | |
3769 | ||
3770 | free(r); | |
3771 | return k; | |
3772 | ||
3773 | fail: | |
3774 | free(r); | |
3775 | return NULL; | |
3776 | } | |
3777 | ||
3778 | char **replace_env_argv(char **argv, char **env) { | |
3779 | char **r, **i; | |
c24eb49e LP |
3780 | unsigned k = 0, l = 0; |
3781 | ||
3782 | l = strv_length(argv); | |
fab56fc5 | 3783 | |
c24eb49e | 3784 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3785 | return NULL; |
3786 | ||
3787 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3788 | |
3789 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3790 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3791 | char *e; | |
3792 | char **w, **m; | |
3793 | unsigned q; | |
c24eb49e | 3794 | |
b95cf362 | 3795 | if ((e = strv_env_get(env, *i+1))) { |
c24eb49e LP |
3796 | |
3797 | if (!(m = strv_split_quoted(e))) { | |
3798 | r[k] = NULL; | |
3799 | strv_free(r); | |
3800 | return NULL; | |
3801 | } | |
b95cf362 LP |
3802 | } else |
3803 | m = NULL; | |
c24eb49e | 3804 | |
b95cf362 LP |
3805 | q = strv_length(m); |
3806 | l = l + q - 1; | |
c24eb49e | 3807 | |
b95cf362 LP |
3808 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3809 | r[k] = NULL; | |
3810 | strv_free(r); | |
3811 | strv_free(m); | |
3812 | return NULL; | |
3813 | } | |
c24eb49e | 3814 | |
b95cf362 LP |
3815 | r = w; |
3816 | if (m) { | |
c24eb49e LP |
3817 | memcpy(r + k, m, q * sizeof(char*)); |
3818 | free(m); | |
c24eb49e | 3819 | } |
b95cf362 LP |
3820 | |
3821 | k += q; | |
3822 | continue; | |
c24eb49e LP |
3823 | } |
3824 | ||
3825 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3826 | if (!(r[k++] = replace_env(*i, env))) { |
3827 | strv_free(r); | |
3828 | return NULL; | |
3829 | } | |
3830 | } | |
3831 | ||
3832 | r[k] = NULL; | |
3833 | return r; | |
3834 | } | |
3835 | ||
fa776d8e LP |
3836 | int columns(void) { |
3837 | static __thread int parsed_columns = 0; | |
3838 | const char *e; | |
3839 | ||
3bfc7184 | 3840 | if (_likely_(parsed_columns > 0)) |
fa776d8e LP |
3841 | return parsed_columns; |
3842 | ||
3843 | if ((e = getenv("COLUMNS"))) | |
3844 | parsed_columns = atoi(e); | |
3845 | ||
3846 | if (parsed_columns <= 0) { | |
3847 | struct winsize ws; | |
3848 | zero(ws); | |
3849 | ||
9ed95f43 | 3850 | if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) >= 0) |
fa776d8e LP |
3851 | parsed_columns = ws.ws_col; |
3852 | } | |
3853 | ||
3854 | if (parsed_columns <= 0) | |
3855 | parsed_columns = 80; | |
3856 | ||
3857 | return parsed_columns; | |
3858 | } | |
3859 | ||
b4f10a5e LP |
3860 | int running_in_chroot(void) { |
3861 | struct stat a, b; | |
3862 | ||
3863 | zero(a); | |
3864 | zero(b); | |
3865 | ||
3866 | /* Only works as root */ | |
3867 | ||
3868 | if (stat("/proc/1/root", &a) < 0) | |
3869 | return -errno; | |
3870 | ||
3871 | if (stat("/", &b) < 0) | |
3872 | return -errno; | |
3873 | ||
3874 | return | |
3875 | a.st_dev != b.st_dev || | |
3876 | a.st_ino != b.st_ino; | |
3877 | } | |
3878 | ||
8fe914ec LP |
3879 | char *ellipsize(const char *s, unsigned length, unsigned percent) { |
3880 | size_t l, x; | |
3881 | char *r; | |
3882 | ||
3883 | assert(s); | |
3884 | assert(percent <= 100); | |
3885 | assert(length >= 3); | |
3886 | ||
3887 | l = strlen(s); | |
3888 | ||
3889 | if (l <= 3 || l <= length) | |
3890 | return strdup(s); | |
3891 | ||
3892 | if (!(r = new0(char, length+1))) | |
3893 | return r; | |
3894 | ||
3895 | x = (length * percent) / 100; | |
3896 | ||
3897 | if (x > length - 3) | |
3898 | x = length - 3; | |
3899 | ||
3900 | memcpy(r, s, x); | |
3901 | r[x] = '.'; | |
3902 | r[x+1] = '.'; | |
3903 | r[x+2] = '.'; | |
3904 | memcpy(r + x + 3, | |
3905 | s + l - (length - x - 3), | |
3906 | length - x - 3); | |
3907 | ||
3908 | return r; | |
3909 | } | |
3910 | ||
f6144808 LP |
3911 | int touch(const char *path) { |
3912 | int fd; | |
3913 | ||
3914 | assert(path); | |
3915 | ||
14f3c825 | 3916 | if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0) |
f6144808 LP |
3917 | return -errno; |
3918 | ||
3919 | close_nointr_nofail(fd); | |
3920 | return 0; | |
3921 | } | |
afea26ad | 3922 | |
97c4a07d | 3923 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3924 | size_t l; |
3925 | assert(s); | |
3926 | ||
3927 | if ((l = strlen(s)) < 2) | |
3928 | return strdup(s); | |
3929 | ||
97c4a07d | 3930 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3931 | return strndup(s+1, l-2); |
3932 | ||
3933 | return strdup(s); | |
3934 | } | |
3935 | ||
5f7c426e LP |
3936 | char *normalize_env_assignment(const char *s) { |
3937 | char *name, *value, *p, *r; | |
3938 | ||
3939 | p = strchr(s, '='); | |
3940 | ||
3941 | if (!p) { | |
3942 | if (!(r = strdup(s))) | |
3943 | return NULL; | |
3944 | ||
3945 | return strstrip(r); | |
3946 | } | |
3947 | ||
3948 | if (!(name = strndup(s, p - s))) | |
3949 | return NULL; | |
3950 | ||
3951 | if (!(p = strdup(p+1))) { | |
3952 | free(name); | |
3953 | return NULL; | |
3954 | } | |
3955 | ||
3956 | value = unquote(strstrip(p), QUOTES); | |
3957 | free(p); | |
3958 | ||
3959 | if (!value) { | |
5f7c426e LP |
3960 | free(name); |
3961 | return NULL; | |
3962 | } | |
3963 | ||
3964 | if (asprintf(&r, "%s=%s", name, value) < 0) | |
3965 | r = NULL; | |
3966 | ||
3967 | free(value); | |
3968 | free(name); | |
3969 | ||
3970 | return r; | |
3971 | } | |
3972 | ||
8e12a6ae | 3973 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3974 | siginfo_t dummy; |
3975 | ||
2e78aa99 | 3976 | assert(pid >= 1); |
1968a360 LP |
3977 | |
3978 | if (!status) | |
3979 | status = &dummy; | |
2e78aa99 LP |
3980 | |
3981 | for (;;) { | |
8e12a6ae LP |
3982 | zero(*status); |
3983 | ||
3984 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3985 | |
3986 | if (errno == EINTR) | |
3987 | continue; | |
3988 | ||
3989 | return -errno; | |
3990 | } | |
3991 | ||
3992 | return 0; | |
3993 | } | |
3994 | } | |
3995 | ||
97c4a07d LP |
3996 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3997 | int r; | |
3998 | siginfo_t status; | |
3999 | ||
4000 | assert(name); | |
4001 | assert(pid > 1); | |
4002 | ||
4003 | if ((r = wait_for_terminate(pid, &status)) < 0) { | |
4004 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); | |
4005 | return r; | |
4006 | } | |
4007 | ||
4008 | if (status.si_code == CLD_EXITED) { | |
4009 | if (status.si_status != 0) { | |
4010 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 4011 | return status.si_status; |
97c4a07d LP |
4012 | } |
4013 | ||
4014 | log_debug("%s succeeded.", name); | |
4015 | return 0; | |
4016 | ||
4017 | } else if (status.si_code == CLD_KILLED || | |
4018 | status.si_code == CLD_DUMPED) { | |
4019 | ||
4020 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
4021 | return -EPROTO; | |
4022 | } | |
4023 | ||
4024 | log_warning("%s failed due to unknown reason.", name); | |
4025 | return -EPROTO; | |
4026 | ||
4027 | } | |
4028 | ||
3c14d26c | 4029 | void freeze(void) { |
720ce21d LP |
4030 | |
4031 | /* Make sure nobody waits for us on a socket anymore */ | |
4032 | close_all_fds(NULL, 0); | |
4033 | ||
c29597a1 LP |
4034 | sync(); |
4035 | ||
3c14d26c LP |
4036 | for (;;) |
4037 | pause(); | |
4038 | } | |
4039 | ||
00dc5d76 LP |
4040 | bool null_or_empty(struct stat *st) { |
4041 | assert(st); | |
4042 | ||
4043 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
4044 | return true; | |
4045 | ||
c8f26f42 | 4046 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
4047 | return true; |
4048 | ||
4049 | return false; | |
4050 | } | |
4051 | ||
83096483 LP |
4052 | int null_or_empty_path(const char *fn) { |
4053 | struct stat st; | |
4054 | ||
4055 | assert(fn); | |
4056 | ||
4057 | if (stat(fn, &st) < 0) | |
4058 | return -errno; | |
4059 | ||
4060 | return null_or_empty(&st); | |
4061 | } | |
4062 | ||
a247755d | 4063 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
4064 | int nfd; |
4065 | DIR *d; | |
4066 | ||
4067 | if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0) | |
4068 | return NULL; | |
4069 | ||
4070 | if (!(d = fdopendir(nfd))) { | |
4071 | close_nointr_nofail(nfd); | |
4072 | return NULL; | |
4073 | } | |
4074 | ||
4075 | return d; | |
3b63d2d3 LP |
4076 | } |
4077 | ||
8a0867d6 LP |
4078 | int signal_from_string_try_harder(const char *s) { |
4079 | int signo; | |
4080 | assert(s); | |
4081 | ||
4082 | if ((signo = signal_from_string(s)) <= 0) | |
4083 | if (startswith(s, "SIG")) | |
4084 | return signal_from_string(s+3); | |
4085 | ||
4086 | return signo; | |
4087 | } | |
4088 | ||
10717a1a LP |
4089 | void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { |
4090 | ||
4091 | assert(f); | |
4092 | assert(name); | |
4093 | assert(t); | |
4094 | ||
4095 | if (!dual_timestamp_is_set(t)) | |
4096 | return; | |
4097 | ||
4098 | fprintf(f, "%s=%llu %llu\n", | |
4099 | name, | |
4100 | (unsigned long long) t->realtime, | |
4101 | (unsigned long long) t->monotonic); | |
4102 | } | |
4103 | ||
799fd0fd | 4104 | void dual_timestamp_deserialize(const char *value, dual_timestamp *t) { |
10717a1a LP |
4105 | unsigned long long a, b; |
4106 | ||
10717a1a LP |
4107 | assert(value); |
4108 | assert(t); | |
4109 | ||
4110 | if (sscanf(value, "%lli %llu", &a, &b) != 2) | |
4111 | log_debug("Failed to parse finish timestamp value %s", value); | |
4112 | else { | |
4113 | t->realtime = a; | |
4114 | t->monotonic = b; | |
4115 | } | |
4116 | } | |
4117 | ||
e23a0ce8 LP |
4118 | char *fstab_node_to_udev_node(const char *p) { |
4119 | char *dn, *t, *u; | |
4120 | int r; | |
4121 | ||
4122 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
4123 | * UTF8 chars unescaped */ | |
4124 | ||
4125 | if (startswith(p, "LABEL=")) { | |
4126 | ||
4127 | if (!(u = unquote(p+6, "\"\'"))) | |
4128 | return NULL; | |
4129 | ||
4130 | t = xescape(u, "/ "); | |
4131 | free(u); | |
4132 | ||
4133 | if (!t) | |
4134 | return NULL; | |
4135 | ||
4136 | r = asprintf(&dn, "/dev/disk/by-label/%s", t); | |
4137 | free(t); | |
4138 | ||
4139 | if (r < 0) | |
4140 | return NULL; | |
4141 | ||
4142 | return dn; | |
4143 | } | |
4144 | ||
4145 | if (startswith(p, "UUID=")) { | |
4146 | ||
4147 | if (!(u = unquote(p+5, "\"\'"))) | |
4148 | return NULL; | |
4149 | ||
4150 | t = xescape(u, "/ "); | |
4151 | free(u); | |
4152 | ||
4153 | if (!t) | |
4154 | return NULL; | |
4155 | ||
0058d7b9 | 4156 | r = asprintf(&dn, "/dev/disk/by-uuid/%s", t); |
e23a0ce8 LP |
4157 | free(t); |
4158 | ||
4159 | if (r < 0) | |
4160 | return NULL; | |
4161 | ||
4162 | return dn; | |
4163 | } | |
4164 | ||
4165 | return strdup(p); | |
4166 | } | |
4167 | ||
e9ddabc2 LP |
4168 | void filter_environ(const char *prefix) { |
4169 | int i, j; | |
4170 | assert(prefix); | |
4171 | ||
4172 | if (!environ) | |
4173 | return; | |
4174 | ||
4175 | for (i = 0, j = 0; environ[i]; i++) { | |
4176 | ||
4177 | if (startswith(environ[i], prefix)) | |
4178 | continue; | |
4179 | ||
4180 | environ[j++] = environ[i]; | |
4181 | } | |
4182 | ||
4183 | environ[j] = NULL; | |
4184 | } | |
4185 | ||
f212ac12 LP |
4186 | bool tty_is_vc(const char *tty) { |
4187 | assert(tty); | |
4188 | ||
4189 | if (startswith(tty, "/dev/")) | |
4190 | tty += 5; | |
4191 | ||
98a28fef LP |
4192 | return vtnr_from_tty(tty) >= 0; |
4193 | } | |
4194 | ||
4195 | int vtnr_from_tty(const char *tty) { | |
4196 | int i, r; | |
4197 | ||
4198 | assert(tty); | |
4199 | ||
4200 | if (startswith(tty, "/dev/")) | |
4201 | tty += 5; | |
4202 | ||
4203 | if (!startswith(tty, "tty") ) | |
4204 | return -EINVAL; | |
4205 | ||
4206 | if (tty[3] < '0' || tty[3] > '9') | |
4207 | return -EINVAL; | |
4208 | ||
4209 | r = safe_atoi(tty+3, &i); | |
4210 | if (r < 0) | |
4211 | return r; | |
4212 | ||
4213 | if (i < 0 || i > 63) | |
4214 | return -EINVAL; | |
4215 | ||
4216 | return i; | |
f212ac12 LP |
4217 | } |
4218 | ||
e3aa71c3 | 4219 | const char *default_term_for_tty(const char *tty) { |
3030ccd7 LP |
4220 | char *active = NULL; |
4221 | const char *term; | |
4222 | ||
e3aa71c3 LP |
4223 | assert(tty); |
4224 | ||
4225 | if (startswith(tty, "/dev/")) | |
4226 | tty += 5; | |
4227 | ||
3030ccd7 LP |
4228 | /* Resolve where /dev/console is pointing when determining |
4229 | * TERM */ | |
4230 | if (streq(tty, "console")) | |
4231 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { | |
079a09fb LP |
4232 | /* If multiple log outputs are configured the |
4233 | * last one is what /dev/console points to */ | |
4234 | if ((tty = strrchr(active, ' '))) | |
4235 | tty++; | |
4236 | else | |
4237 | tty = active; | |
3030ccd7 LP |
4238 | } |
4239 | ||
f212ac12 | 4240 | term = tty_is_vc(tty) ? "TERM=linux" : "TERM=vt100"; |
3030ccd7 | 4241 | free(active); |
e3aa71c3 | 4242 | |
3030ccd7 | 4243 | return term; |
e3aa71c3 LP |
4244 | } |
4245 | ||
07faed4f LP |
4246 | /* Returns a short identifier for the various VM implementations */ |
4247 | int detect_vm(const char **id) { | |
46a08e38 LP |
4248 | |
4249 | #if defined(__i386__) || defined(__x86_64__) | |
4250 | ||
4251 | /* Both CPUID and DMI are x86 specific interfaces... */ | |
4252 | ||
721bca57 | 4253 | static const char *const dmi_vendors[] = { |
46a08e38 LP |
4254 | "/sys/class/dmi/id/sys_vendor", |
4255 | "/sys/class/dmi/id/board_vendor", | |
4256 | "/sys/class/dmi/id/bios_vendor" | |
4257 | }; | |
4258 | ||
4e08da90 | 4259 | static const char dmi_vendor_table[] = |
07faed4f LP |
4260 | "QEMU\0" "qemu\0" |
4261 | /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */ | |
4262 | "VMware\0" "vmware\0" | |
4263 | "VMW\0" "vmware\0" | |
4264 | "Microsoft Corporation\0" "microsoft\0" | |
4265 | "innotek GmbH\0" "oracle\0" | |
4266 | "Xen\0" "xen\0" | |
34df5a34 | 4267 | "Bochs\0" "bochs\0"; |
07faed4f | 4268 | |
4e08da90 | 4269 | static const char cpuid_vendor_table[] = |
07faed4f LP |
4270 | "XenVMMXenVMM\0" "xen\0" |
4271 | "KVMKVMKVM\0" "kvm\0" | |
4272 | /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */ | |
4273 | "VMwareVMware\0" "vmware\0" | |
4274 | /* http://msdn.microsoft.com/en-us/library/ff542428.aspx */ | |
34df5a34 | 4275 | "Microsoft Hv\0" "microsoft\0"; |
07faed4f LP |
4276 | |
4277 | uint32_t eax, ecx; | |
46a08e38 LP |
4278 | union { |
4279 | uint32_t sig32[3]; | |
4280 | char text[13]; | |
4281 | } sig; | |
46a08e38 | 4282 | unsigned i; |
07faed4f | 4283 | const char *j, *k; |
721bca57 | 4284 | bool hypervisor; |
46a08e38 LP |
4285 | |
4286 | /* http://lwn.net/Articles/301888/ */ | |
4287 | zero(sig); | |
4288 | ||
46a08e38 LP |
4289 | #if defined (__i386__) |
4290 | #define REG_a "eax" | |
4291 | #define REG_b "ebx" | |
4292 | #elif defined (__amd64__) | |
4293 | #define REG_a "rax" | |
4294 | #define REG_b "rbx" | |
4295 | #endif | |
4296 | ||
07faed4f LP |
4297 | /* First detect whether there is a hypervisor */ |
4298 | eax = 1; | |
46a08e38 LP |
4299 | __asm__ __volatile__ ( |
4300 | /* ebx/rbx is being used for PIC! */ | |
4301 | " push %%"REG_b" \n\t" | |
4302 | " cpuid \n\t" | |
46a08e38 LP |
4303 | " pop %%"REG_b" \n\t" |
4304 | ||
07faed4f | 4305 | : "=a" (eax), "=c" (ecx) |
46a08e38 LP |
4306 | : "0" (eax) |
4307 | ); | |
4308 | ||
ec195f55 | 4309 | hypervisor = !!(ecx & 0x80000000U); |
721bca57 LP |
4310 | |
4311 | if (hypervisor) { | |
07faed4f LP |
4312 | |
4313 | /* There is a hypervisor, see what it is */ | |
4314 | eax = 0x40000000U; | |
4315 | __asm__ __volatile__ ( | |
4316 | /* ebx/rbx is being used for PIC! */ | |
4317 | " push %%"REG_b" \n\t" | |
4318 | " cpuid \n\t" | |
4319 | " mov %%ebx, %1 \n\t" | |
4320 | " pop %%"REG_b" \n\t" | |
4321 | ||
4322 | : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2]) | |
4323 | : "0" (eax) | |
4324 | ); | |
4325 | ||
4326 | NULSTR_FOREACH_PAIR(j, k, cpuid_vendor_table) | |
4327 | if (streq(sig.text, j)) { | |
4328 | ||
4329 | if (id) | |
4330 | *id = k; | |
4331 | ||
4332 | return 1; | |
4333 | } | |
721bca57 | 4334 | } |
07faed4f | 4335 | |
721bca57 LP |
4336 | for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) { |
4337 | char *s; | |
4338 | int r; | |
4339 | const char *found = NULL; | |
4340 | ||
4341 | if ((r = read_one_line_file(dmi_vendors[i], &s)) < 0) { | |
4342 | if (r != -ENOENT) | |
4343 | return r; | |
4344 | ||
4345 | continue; | |
4346 | } | |
4347 | ||
4348 | NULSTR_FOREACH_PAIR(j, k, dmi_vendor_table) | |
4349 | if (startswith(s, j)) | |
4350 | found = k; | |
4351 | free(s); | |
4352 | ||
4353 | if (found) { | |
4354 | if (id) | |
4355 | *id = found; | |
4356 | ||
4357 | return 1; | |
4358 | } | |
4359 | } | |
4360 | ||
4361 | if (hypervisor) { | |
07faed4f LP |
4362 | if (id) |
4363 | *id = "other"; | |
4364 | ||
4365 | return 1; | |
4366 | } | |
46a08e38 | 4367 | |
721bca57 | 4368 | #endif |
07faed4f LP |
4369 | return 0; |
4370 | } | |
4371 | ||
ef2df9f4 | 4372 | int detect_container(const char **id) { |
f9b9232b LP |
4373 | FILE *f; |
4374 | ||
ef2df9f4 LP |
4375 | /* Unfortunately many of these operations require root access |
4376 | * in one way or another */ | |
f9b9232b | 4377 | |
ef2df9f4 LP |
4378 | if (geteuid() != 0) |
4379 | return -EPERM; | |
4380 | ||
4381 | if (running_in_chroot() > 0) { | |
f9b9232b LP |
4382 | |
4383 | if (id) | |
ef2df9f4 | 4384 | *id = "chroot"; |
f9b9232b LP |
4385 | |
4386 | return 1; | |
4387 | } | |
07faed4f | 4388 | |
ef2df9f4 LP |
4389 | /* /proc/vz exists in container and outside of the container, |
4390 | * /proc/bc only outside of the container. */ | |
4391 | if (access("/proc/vz", F_OK) >= 0 && | |
4392 | access("/proc/bc", F_OK) < 0) { | |
07faed4f | 4393 | |
ef2df9f4 LP |
4394 | if (id) |
4395 | *id = "openvz"; | |
4396 | ||
4397 | return 1; | |
f9b9232b | 4398 | } |
07faed4f | 4399 | |
ccaa6149 | 4400 | if ((f = fopen("/proc/self/cgroup", "re"))) { |
f9b9232b LP |
4401 | |
4402 | for (;;) { | |
4403 | char line[LINE_MAX], *p; | |
4404 | ||
4405 | if (!fgets(line, sizeof(line), f)) | |
4406 | break; | |
4407 | ||
4408 | if (!(p = strchr(strstrip(line), ':'))) | |
4409 | continue; | |
4410 | ||
4411 | if (strncmp(p, ":ns:", 4)) | |
4412 | continue; | |
4413 | ||
4414 | if (!streq(p, ":ns:/")) { | |
4415 | fclose(f); | |
4416 | ||
ef2df9f4 | 4417 | if (id) |
28cf382a | 4418 | *id = "pidns"; |
ef2df9f4 LP |
4419 | |
4420 | return 1; | |
f9b9232b LP |
4421 | } |
4422 | } | |
4423 | ||
4424 | fclose(f); | |
07faed4f LP |
4425 | } |
4426 | ||
ef2df9f4 LP |
4427 | return 0; |
4428 | } | |
4429 | ||
4430 | /* Returns a short identifier for the various VM/container implementations */ | |
4431 | int detect_virtualization(const char **id) { | |
4432 | static __thread const char *cached_id = NULL; | |
4433 | const char *_id; | |
4434 | int r; | |
4435 | ||
3bfc7184 | 4436 | if (_likely_(cached_id)) { |
ef2df9f4 LP |
4437 | |
4438 | if (cached_id == (const char*) -1) | |
4439 | return 0; | |
4440 | ||
4441 | if (id) | |
4442 | *id = cached_id; | |
4443 | ||
4444 | return 1; | |
f9b9232b | 4445 | } |
07faed4f | 4446 | |
ef2df9f4 LP |
4447 | if ((r = detect_container(&_id)) != 0) |
4448 | goto finish; | |
4449 | ||
f9b9232b | 4450 | r = detect_vm(&_id); |
07faed4f | 4451 | |
f9b9232b | 4452 | finish: |
ef2df9f4 | 4453 | if (r > 0) { |
f9b9232b | 4454 | cached_id = _id; |
07faed4f | 4455 | |
ef2df9f4 LP |
4456 | if (id) |
4457 | *id = _id; | |
4458 | } else if (r == 0) | |
4459 | cached_id = (const char*) -1; | |
f9b9232b LP |
4460 | |
4461 | return r; | |
46a08e38 LP |
4462 | } |
4463 | ||
fb19a739 LP |
4464 | bool dirent_is_file(struct dirent *de) { |
4465 | assert(de); | |
4466 | ||
4467 | if (ignore_file(de->d_name)) | |
4468 | return false; | |
4469 | ||
4470 | if (de->d_type != DT_REG && | |
4471 | de->d_type != DT_LNK && | |
4472 | de->d_type != DT_UNKNOWN) | |
4473 | return false; | |
4474 | ||
4475 | return true; | |
4476 | } | |
4477 | ||
83cc030f LP |
4478 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
4479 | DIR *_d = NULL; | |
4480 | struct dirent *de; | |
4481 | Hashmap *pids = NULL; | |
4482 | ||
4483 | assert(directory); | |
4484 | ||
4485 | /* Executes all binaries in a directory in parallel and waits | |
4486 | * until all they all finished. */ | |
4487 | ||
4488 | if (!d) { | |
4489 | if (!(_d = opendir(directory))) { | |
4490 | ||
4491 | if (errno == ENOENT) | |
4492 | return; | |
4493 | ||
4494 | log_error("Failed to enumerate directory %s: %m", directory); | |
4495 | return; | |
4496 | } | |
4497 | ||
4498 | d = _d; | |
4499 | } | |
4500 | ||
4501 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
4502 | log_error("Failed to allocate set."); | |
4503 | goto finish; | |
4504 | } | |
4505 | ||
4506 | while ((de = readdir(d))) { | |
4507 | char *path; | |
4508 | pid_t pid; | |
4509 | int k; | |
4510 | ||
fb19a739 | 4511 | if (!dirent_is_file(de)) |
83cc030f LP |
4512 | continue; |
4513 | ||
4514 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
4515 | log_error("Out of memory"); | |
4516 | continue; | |
4517 | } | |
4518 | ||
4519 | if ((pid = fork()) < 0) { | |
4520 | log_error("Failed to fork: %m"); | |
4521 | free(path); | |
4522 | continue; | |
4523 | } | |
4524 | ||
4525 | if (pid == 0) { | |
4526 | char *_argv[2]; | |
4527 | /* Child */ | |
4528 | ||
4529 | if (!argv) { | |
4530 | _argv[0] = path; | |
4531 | _argv[1] = NULL; | |
4532 | argv = _argv; | |
4533 | } else | |
4534 | if (!argv[0]) | |
4535 | argv[0] = path; | |
4536 | ||
4537 | execv(path, argv); | |
4538 | ||
4539 | log_error("Failed to execute %s: %m", path); | |
4540 | _exit(EXIT_FAILURE); | |
4541 | } | |
4542 | ||
4543 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
4544 | ||
4545 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
4546 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
4547 | free(path); | |
4548 | } | |
4549 | } | |
4550 | ||
4551 | while (!hashmap_isempty(pids)) { | |
4552 | siginfo_t si; | |
4553 | char *path; | |
4554 | ||
4555 | zero(si); | |
4556 | if (waitid(P_ALL, 0, &si, WEXITED) < 0) { | |
4557 | ||
4558 | if (errno == EINTR) | |
4559 | continue; | |
4560 | ||
4561 | log_error("waitid() failed: %m"); | |
4562 | goto finish; | |
4563 | } | |
4564 | ||
4565 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
4566 | if (!is_clean_exit(si.si_code, si.si_status)) { | |
4567 | if (si.si_code == CLD_EXITED) | |
4568 | log_error("%s exited with exit status %i.", path, si.si_status); | |
4569 | else | |
4570 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
4571 | } else | |
4572 | log_debug("%s exited successfully.", path); | |
4573 | ||
4574 | free(path); | |
4575 | } | |
4576 | } | |
4577 | ||
4578 | finish: | |
4579 | if (_d) | |
4580 | closedir(_d); | |
4581 | ||
4582 | if (pids) | |
4583 | hashmap_free_free(pids); | |
4584 | } | |
4585 | ||
430c18ed LP |
4586 | int kill_and_sigcont(pid_t pid, int sig) { |
4587 | int r; | |
4588 | ||
4589 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4590 | ||
4591 | if (r >= 0) | |
4592 | kill(pid, SIGCONT); | |
4593 | ||
4594 | return r; | |
4595 | } | |
4596 | ||
05feefe0 LP |
4597 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4598 | const char *i; | |
4599 | ||
4600 | if (!nulstr) | |
4601 | return false; | |
4602 | ||
4603 | NULSTR_FOREACH(i, nulstr) | |
4604 | if (streq(i, needle)) | |
4605 | return true; | |
4606 | ||
4607 | return false; | |
4608 | } | |
4609 | ||
6faa1114 | 4610 | bool plymouth_running(void) { |
9408a2d2 | 4611 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4612 | } |
4613 | ||
7c3b203c LP |
4614 | void parse_syslog_priority(char **p, int *priority) { |
4615 | int a = 0, b = 0, c = 0; | |
4616 | int k; | |
4617 | ||
4618 | assert(p); | |
4619 | assert(*p); | |
4620 | assert(priority); | |
4621 | ||
4622 | if ((*p)[0] != '<') | |
4623 | return; | |
4624 | ||
4625 | if (!strchr(*p, '>')) | |
4626 | return; | |
4627 | ||
4628 | if ((*p)[2] == '>') { | |
4629 | c = undecchar((*p)[1]); | |
4630 | k = 3; | |
4631 | } else if ((*p)[3] == '>') { | |
4632 | b = undecchar((*p)[1]); | |
4633 | c = undecchar((*p)[2]); | |
4634 | k = 4; | |
4635 | } else if ((*p)[4] == '>') { | |
4636 | a = undecchar((*p)[1]); | |
4637 | b = undecchar((*p)[2]); | |
4638 | c = undecchar((*p)[3]); | |
4639 | k = 5; | |
4640 | } else | |
4641 | return; | |
4642 | ||
4643 | if (a < 0 || b < 0 || c < 0) | |
4644 | return; | |
4645 | ||
4646 | *priority = a*100+b*10+c; | |
4647 | *p += k; | |
4648 | } | |
4649 | ||
ac123445 LP |
4650 | int have_effective_cap(int value) { |
4651 | cap_t cap; | |
4652 | cap_flag_value_t fv; | |
4653 | int r; | |
4654 | ||
4655 | if (!(cap = cap_get_proc())) | |
4656 | return -errno; | |
4657 | ||
4658 | if (cap_get_flag(cap, value, CAP_EFFECTIVE, &fv) < 0) | |
4659 | r = -errno; | |
4660 | else | |
4661 | r = fv == CAP_SET; | |
4662 | ||
4663 | cap_free(cap); | |
4664 | return r; | |
4665 | } | |
4666 | ||
9beb3f4d LP |
4667 | char* strshorten(char *s, size_t l) { |
4668 | assert(s); | |
4669 | ||
4670 | if (l < strlen(s)) | |
4671 | s[l] = 0; | |
4672 | ||
4673 | return s; | |
4674 | } | |
4675 | ||
4676 | static bool hostname_valid_char(char c) { | |
4677 | return | |
4678 | (c >= 'a' && c <= 'z') || | |
4679 | (c >= 'A' && c <= 'Z') || | |
4680 | (c >= '0' && c <= '9') || | |
4681 | c == '-' || | |
4682 | c == '_' || | |
4683 | c == '.'; | |
4684 | } | |
4685 | ||
4686 | bool hostname_is_valid(const char *s) { | |
4687 | const char *p; | |
4688 | ||
4689 | if (isempty(s)) | |
4690 | return false; | |
4691 | ||
4692 | for (p = s; *p; p++) | |
4693 | if (!hostname_valid_char(*p)) | |
4694 | return false; | |
4695 | ||
4696 | if (p-s > HOST_NAME_MAX) | |
4697 | return false; | |
4698 | ||
4699 | return true; | |
4700 | } | |
4701 | ||
4702 | char* hostname_cleanup(char *s) { | |
4703 | char *p, *d; | |
4704 | ||
4705 | for (p = s, d = s; *p; p++) | |
4706 | if ((*p >= 'a' && *p <= 'z') || | |
4707 | (*p >= 'A' && *p <= 'Z') || | |
4708 | (*p >= '0' && *p <= '9') || | |
4709 | *p == '-' || | |
4710 | *p == '_' || | |
4711 | *p == '.') | |
4712 | *(d++) = *p; | |
4713 | ||
4714 | *d = 0; | |
4715 | ||
4716 | strshorten(s, HOST_NAME_MAX); | |
4717 | return s; | |
4718 | } | |
4719 | ||
1325aa42 LP |
4720 | int pipe_eof(int fd) { |
4721 | struct pollfd pollfd; | |
4722 | int r; | |
4723 | ||
4724 | zero(pollfd); | |
4725 | pollfd.fd = fd; | |
4726 | pollfd.events = POLLIN|POLLHUP; | |
4727 | ||
4728 | r = poll(&pollfd, 1, 0); | |
4729 | if (r < 0) | |
4730 | return -errno; | |
4731 | ||
4732 | if (r == 0) | |
4733 | return 0; | |
4734 | ||
4735 | return pollfd.revents & POLLHUP; | |
4736 | } | |
4737 | ||
5a3ab509 LP |
4738 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4739 | FILE *f; | |
4740 | char *t; | |
4741 | const char *fn; | |
4742 | size_t k; | |
4743 | int fd; | |
4744 | ||
4745 | assert(path); | |
4746 | assert(_f); | |
4747 | assert(_temp_path); | |
4748 | ||
4749 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4750 | if (!t) | |
4751 | return -ENOMEM; | |
4752 | ||
4753 | fn = file_name_from_path(path); | |
4754 | k = fn-path; | |
4755 | memcpy(t, path, k); | |
4756 | t[k] = '.'; | |
4757 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4758 | ||
4759 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4760 | if (fd < 0) { | |
4761 | free(t); | |
4762 | return -errno; | |
4763 | } | |
4764 | ||
4765 | f = fdopen(fd, "we"); | |
4766 | if (!f) { | |
4767 | unlink(t); | |
4768 | free(t); | |
4769 | return -errno; | |
4770 | } | |
4771 | ||
4772 | *_f = f; | |
4773 | *_temp_path = t; | |
4774 | ||
4775 | return 0; | |
4776 | } | |
4777 | ||
6ea832a2 | 4778 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4779 | assert(fd >= 0); |
4780 | ||
6ea832a2 LP |
4781 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4782 | return -errno; | |
4783 | ||
4784 | return 0; | |
4785 | } | |
4786 | ||
4787 | int terminal_vhangup(const char *name) { | |
4788 | int fd, r; | |
4789 | ||
4790 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4791 | if (fd < 0) | |
4792 | return fd; | |
4793 | ||
4794 | r = terminal_vhangup_fd(fd); | |
4795 | close_nointr_nofail(fd); | |
4796 | ||
4797 | return r; | |
4798 | } | |
4799 | ||
4800 | int vt_disallocate(const char *name) { | |
4801 | int fd, r; | |
4802 | unsigned u; | |
6ea832a2 LP |
4803 | |
4804 | /* Deallocate the VT if possible. If not possible | |
4805 | * (i.e. because it is the active one), at least clear it | |
4806 | * entirely (including the scrollback buffer) */ | |
4807 | ||
b83bc4e9 LP |
4808 | if (!startswith(name, "/dev/")) |
4809 | return -EINVAL; | |
4810 | ||
4811 | if (!tty_is_vc(name)) { | |
4812 | /* So this is not a VT. I guess we cannot deallocate | |
4813 | * it then. But let's at least clear the screen */ | |
4814 | ||
4815 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4816 | if (fd < 0) | |
4817 | return fd; | |
4818 | ||
8585357a LP |
4819 | loop_write(fd, |
4820 | "\033[r" /* clear scrolling region */ | |
4821 | "\033[H" /* move home */ | |
4822 | "\033[2J", /* clear screen */ | |
4823 | 10, false); | |
b83bc4e9 LP |
4824 | close_nointr_nofail(fd); |
4825 | ||
4826 | return 0; | |
4827 | } | |
6ea832a2 LP |
4828 | |
4829 | if (!startswith(name, "/dev/tty")) | |
4830 | return -EINVAL; | |
4831 | ||
4832 | r = safe_atou(name+8, &u); | |
4833 | if (r < 0) | |
4834 | return r; | |
4835 | ||
4836 | if (u <= 0) | |
b83bc4e9 | 4837 | return -EINVAL; |
6ea832a2 | 4838 | |
b83bc4e9 | 4839 | /* Try to deallocate */ |
6ea832a2 LP |
4840 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4841 | if (fd < 0) | |
4842 | return fd; | |
4843 | ||
4844 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4845 | close_nointr_nofail(fd); |
6ea832a2 | 4846 | |
b83bc4e9 LP |
4847 | if (r >= 0) |
4848 | return 0; | |
6ea832a2 | 4849 | |
b83bc4e9 | 4850 | if (errno != EBUSY) |
6ea832a2 | 4851 | return -errno; |
6ea832a2 | 4852 | |
b83bc4e9 LP |
4853 | /* Couldn't deallocate, so let's clear it fully with |
4854 | * scrollback */ | |
4855 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4856 | if (fd < 0) |
b83bc4e9 | 4857 | return fd; |
6ea832a2 | 4858 | |
8585357a LP |
4859 | loop_write(fd, |
4860 | "\033[r" /* clear scrolling region */ | |
4861 | "\033[H" /* move home */ | |
4862 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4863 | 10, false); | |
b83bc4e9 | 4864 | close_nointr_nofail(fd); |
6ea832a2 | 4865 | |
b83bc4e9 | 4866 | return 0; |
6ea832a2 LP |
4867 | } |
4868 | ||
db1413d7 KS |
4869 | |
4870 | static int file_is_conf(const struct dirent *d, const char *suffix) { | |
4871 | assert(d); | |
4872 | ||
4873 | if (ignore_file(d->d_name)) | |
4874 | return 0; | |
4875 | ||
4876 | if (d->d_type != DT_REG && | |
4877 | d->d_type != DT_LNK && | |
4878 | d->d_type != DT_UNKNOWN) | |
4879 | return 0; | |
4880 | ||
4881 | return endswith(d->d_name, suffix); | |
4882 | } | |
4883 | ||
4884 | static int files_add(Hashmap *h, const char *path, const char *suffix) { | |
4885 | DIR *dir; | |
f782b8d0 | 4886 | struct dirent buffer, *de; |
db1413d7 KS |
4887 | int r = 0; |
4888 | ||
4889 | dir = opendir(path); | |
4890 | if (!dir) { | |
4891 | if (errno == ENOENT) | |
4892 | return 0; | |
4893 | return -errno; | |
4894 | } | |
4895 | ||
f782b8d0 LP |
4896 | for (;;) { |
4897 | int k; | |
223a3558 | 4898 | char *p, *f; |
f782b8d0 LP |
4899 | |
4900 | k = readdir_r(dir, &buffer, &de); | |
4901 | if (k != 0) { | |
4902 | r = -k; | |
4903 | goto finish; | |
4904 | } | |
4905 | ||
4906 | if (!de) | |
4907 | break; | |
db1413d7 KS |
4908 | |
4909 | if (!file_is_conf(de, suffix)) | |
4910 | continue; | |
4911 | ||
223a3558 | 4912 | if (asprintf(&p, "%s/%s", path, de->d_name) < 0) { |
db1413d7 KS |
4913 | r = -ENOMEM; |
4914 | goto finish; | |
4915 | } | |
4916 | ||
223a3558 KS |
4917 | f = canonicalize_file_name(p); |
4918 | if (!f) { | |
4919 | log_error("Failed to canonicalize file name '%s': %m", p); | |
4920 | free(p); | |
4921 | continue; | |
4922 | } | |
4923 | free(p); | |
4924 | ||
db1413d7 | 4925 | log_debug("found: %s\n", f); |
f782b8d0 | 4926 | if (hashmap_put(h, file_name_from_path(f), f) <= 0) |
db1413d7 KS |
4927 | free(f); |
4928 | } | |
4929 | ||
4930 | finish: | |
4931 | closedir(dir); | |
4932 | return r; | |
4933 | } | |
4934 | ||
4935 | static int base_cmp(const void *a, const void *b) { | |
4936 | const char *s1, *s2; | |
4937 | ||
4938 | s1 = *(char * const *)a; | |
4939 | s2 = *(char * const *)b; | |
4940 | return strcmp(file_name_from_path(s1), file_name_from_path(s2)); | |
4941 | } | |
4942 | ||
44143309 | 4943 | int conf_files_list(char ***strv, const char *suffix, const char *dir, ...) { |
223a3558 KS |
4944 | Hashmap *fh = NULL; |
4945 | char **dirs = NULL; | |
db1413d7 | 4946 | char **files = NULL; |
223a3558 | 4947 | char **p; |
db1413d7 | 4948 | va_list ap; |
44143309 | 4949 | int r = 0; |
db1413d7 | 4950 | |
223a3558 KS |
4951 | va_start(ap, dir); |
4952 | dirs = strv_new_ap(dir, ap); | |
4953 | va_end(ap); | |
4954 | if (!dirs) { | |
4955 | r = -ENOMEM; | |
4956 | goto finish; | |
4957 | } | |
4958 | if (!strv_path_canonicalize(dirs)) { | |
4959 | r = -ENOMEM; | |
4960 | goto finish; | |
4961 | } | |
4962 | if (!strv_uniq(dirs)) { | |
4963 | r = -ENOMEM; | |
4964 | goto finish; | |
4965 | } | |
4966 | ||
db1413d7 KS |
4967 | fh = hashmap_new(string_hash_func, string_compare_func); |
4968 | if (!fh) { | |
44143309 | 4969 | r = -ENOMEM; |
db1413d7 KS |
4970 | goto finish; |
4971 | } | |
4972 | ||
223a3558 KS |
4973 | STRV_FOREACH(p, dirs) { |
4974 | if (files_add(fh, *p, suffix) < 0) { | |
db1413d7 | 4975 | log_error("Failed to search for files."); |
44143309 | 4976 | r = -EINVAL; |
db1413d7 KS |
4977 | goto finish; |
4978 | } | |
db1413d7 | 4979 | } |
db1413d7 KS |
4980 | |
4981 | files = hashmap_get_strv(fh); | |
4982 | if (files == NULL) { | |
4983 | log_error("Failed to compose list of files."); | |
44143309 | 4984 | r = -ENOMEM; |
db1413d7 KS |
4985 | goto finish; |
4986 | } | |
4987 | ||
4988 | qsort(files, hashmap_size(fh), sizeof(char *), base_cmp); | |
8d0e38a2 | 4989 | |
db1413d7 | 4990 | finish: |
223a3558 | 4991 | strv_free(dirs); |
db1413d7 | 4992 | hashmap_free(fh); |
44143309 KS |
4993 | *strv = files; |
4994 | return r; | |
db1413d7 | 4995 | } |
7948c4df | 4996 | |
2076cf88 | 4997 | int hwclock_is_localtime(void) { |
7948c4df | 4998 | FILE *f; |
7948c4df KS |
4999 | bool local = false; |
5000 | ||
5001 | /* | |
5002 | * The third line of adjtime is "UTC" or "LOCAL" or nothing. | |
5003 | * # /etc/adjtime | |
2076cf88 | 5004 | * 0.0 0 0 |
7948c4df KS |
5005 | * 0 |
5006 | * UTC | |
5007 | */ | |
5008 | f = fopen("/etc/adjtime", "re"); | |
5009 | if (f) { | |
2076cf88 LP |
5010 | char line[LINE_MAX]; |
5011 | bool b; | |
5012 | ||
5013 | b = fgets(line, sizeof(line), f) && | |
5014 | fgets(line, sizeof(line), f) && | |
5015 | fgets(line, sizeof(line), f); | |
5016 | ||
7948c4df | 5017 | fclose(f); |
2076cf88 LP |
5018 | |
5019 | if (!b) | |
5020 | return -EIO; | |
5021 | ||
5022 | ||
5023 | truncate_nl(line); | |
5024 | local = streq(line, "LOCAL"); | |
5025 | ||
5026 | } else if (errno != -ENOENT) | |
5027 | return -errno; | |
5028 | ||
7948c4df KS |
5029 | return local; |
5030 | } | |
5031 | ||
ff4daf5a | 5032 | int hwclock_apply_localtime_delta(int *min) { |
7948c4df | 5033 | const struct timeval *tv_null = NULL; |
2076cf88 | 5034 | struct timespec ts; |
7948c4df KS |
5035 | struct tm *tm; |
5036 | int minuteswest; | |
5037 | struct timezone tz; | |
5038 | ||
2076cf88 LP |
5039 | assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0); |
5040 | assert_se(tm = localtime(&ts.tv_sec)); | |
7948c4df KS |
5041 | minuteswest = tm->tm_gmtoff / 60; |
5042 | ||
5043 | tz.tz_minuteswest = -minuteswest; | |
5044 | tz.tz_dsttime = 0; /* DST_NONE*/ | |
5045 | ||
5046 | /* | |
5047 | * If the hardware clock does not run in UTC, but in local time: | |
5048 | * The very first time we set the kernel's timezone, it will warp | |
5049 | * the clock so that it runs in UTC instead of local time. | |
5050 | */ | |
5051 | if (settimeofday(tv_null, &tz) < 0) | |
5052 | return -errno; | |
ff4daf5a KS |
5053 | if (min) |
5054 | *min = minuteswest; | |
5055 | return 0; | |
2076cf88 LP |
5056 | } |
5057 | ||
5058 | int hwclock_reset_localtime_delta(void) { | |
5059 | const struct timeval *tv_null = NULL; | |
5060 | struct timezone tz; | |
5061 | ||
5062 | tz.tz_minuteswest = 0; | |
5063 | tz.tz_dsttime = 0; /* DST_NONE*/ | |
5064 | ||
5065 | if (settimeofday(tv_null, &tz) < 0) | |
5066 | return -errno; | |
5067 | ||
5068 | return 0; | |
7948c4df KS |
5069 | } |
5070 | ||
5071 | int hwclock_get_time(struct tm *tm) { | |
5072 | int fd; | |
5073 | int err = 0; | |
5074 | ||
2076cf88 LP |
5075 | assert(tm); |
5076 | ||
7948c4df KS |
5077 | fd = open("/dev/rtc0", O_RDONLY|O_CLOEXEC); |
5078 | if (fd < 0) | |
5079 | return -errno; | |
2076cf88 LP |
5080 | |
5081 | /* This leaves the timezone fields of struct tm | |
5082 | * uninitialized! */ | |
7948c4df KS |
5083 | if (ioctl(fd, RTC_RD_TIME, tm) < 0) |
5084 | err = -errno; | |
2076cf88 LP |
5085 | |
5086 | /* We don't now daylight saving, so we reset this in order not | |
5087 | * to confused mktime(). */ | |
5088 | tm->tm_isdst = -1; | |
5089 | ||
5090 | close_nointr_nofail(fd); | |
7948c4df KS |
5091 | |
5092 | return err; | |
5093 | } | |
5094 | ||
5095 | int hwclock_set_time(const struct tm *tm) { | |
5096 | int fd; | |
5097 | int err = 0; | |
5098 | ||
2076cf88 LP |
5099 | assert(tm); |
5100 | ||
7948c4df KS |
5101 | fd = open("/dev/rtc0", O_RDONLY|O_CLOEXEC); |
5102 | if (fd < 0) | |
5103 | return -errno; | |
2076cf88 | 5104 | |
7948c4df KS |
5105 | if (ioctl(fd, RTC_SET_TIME, tm) < 0) |
5106 | err = -errno; | |
2076cf88 LP |
5107 | |
5108 | close_nointr_nofail(fd); | |
7948c4df KS |
5109 | |
5110 | return err; | |
5111 | } | |
f41607a6 | 5112 | |
34ca941c LP |
5113 | int copy_file(const char *from, const char *to) { |
5114 | int r, fdf, fdt; | |
5115 | ||
5116 | assert(from); | |
5117 | assert(to); | |
5118 | ||
5119 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5120 | if (fdf < 0) | |
5121 | return -errno; | |
5122 | ||
5123 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
5124 | if (fdt < 0) { | |
5125 | close_nointr_nofail(fdf); | |
5126 | return -errno; | |
5127 | } | |
5128 | ||
5129 | for (;;) { | |
5130 | char buf[PIPE_BUF]; | |
5131 | ssize_t n, k; | |
5132 | ||
5133 | n = read(fdf, buf, sizeof(buf)); | |
5134 | if (n < 0) { | |
5135 | r = -errno; | |
5136 | ||
5137 | close_nointr_nofail(fdf); | |
5138 | close_nointr(fdt); | |
5139 | unlink(to); | |
5140 | ||
5141 | return r; | |
5142 | } | |
5143 | ||
5144 | if (n == 0) | |
5145 | break; | |
5146 | ||
5147 | errno = 0; | |
5148 | k = loop_write(fdt, buf, n, false); | |
5149 | if (n != k) { | |
5150 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
5151 | ||
5152 | close_nointr_nofail(fdf); | |
5153 | close_nointr(fdt); | |
5154 | ||
5155 | unlink(to); | |
5156 | return r; | |
5157 | } | |
5158 | } | |
5159 | ||
5160 | close_nointr_nofail(fdf); | |
5161 | r = close_nointr(fdt); | |
5162 | ||
5163 | if (r < 0) { | |
5164 | unlink(to); | |
5165 | return r; | |
5166 | } | |
5167 | ||
5168 | return 0; | |
5169 | } | |
5170 | ||
5171 | int symlink_or_copy(const char *from, const char *to) { | |
5172 | char *pf = NULL, *pt = NULL; | |
5173 | struct stat a, b; | |
5174 | int r; | |
5175 | ||
5176 | assert(from); | |
5177 | assert(to); | |
5178 | ||
5179 | if (parent_of_path(from, &pf) < 0 || | |
5180 | parent_of_path(to, &pt) < 0) { | |
5181 | r = -ENOMEM; | |
5182 | goto finish; | |
5183 | } | |
5184 | ||
5185 | if (stat(pf, &a) < 0 || | |
5186 | stat(pt, &b) < 0) { | |
5187 | r = -errno; | |
5188 | goto finish; | |
5189 | } | |
5190 | ||
5191 | if (a.st_dev != b.st_dev) { | |
5192 | free(pf); | |
5193 | free(pt); | |
5194 | ||
5195 | return copy_file(from, to); | |
5196 | } | |
5197 | ||
5198 | if (symlink(from, to) < 0) { | |
5199 | r = -errno; | |
5200 | goto finish; | |
5201 | } | |
5202 | ||
5203 | r = 0; | |
5204 | ||
5205 | finish: | |
5206 | free(pf); | |
5207 | free(pt); | |
5208 | ||
5209 | return r; | |
5210 | } | |
5211 | ||
5212 | int symlink_or_copy_atomic(const char *from, const char *to) { | |
5213 | char *t, *x; | |
5214 | const char *fn; | |
5215 | size_t k; | |
5216 | unsigned long long ull; | |
5217 | unsigned i; | |
5218 | int r; | |
5219 | ||
5220 | assert(from); | |
5221 | assert(to); | |
5222 | ||
5223 | t = new(char, strlen(to) + 1 + 16 + 1); | |
5224 | if (!t) | |
5225 | return -ENOMEM; | |
5226 | ||
5227 | fn = file_name_from_path(to); | |
5228 | k = fn-to; | |
5229 | memcpy(t, to, k); | |
5230 | t[k] = '.'; | |
5231 | x = stpcpy(t+k+1, fn); | |
5232 | ||
5233 | ull = random_ull(); | |
5234 | for (i = 0; i < 16; i++) { | |
5235 | *(x++) = hexchar(ull & 0xF); | |
5236 | ull >>= 4; | |
5237 | } | |
5238 | ||
5239 | *x = 0; | |
5240 | ||
5241 | r = symlink_or_copy(from, t); | |
5242 | if (r < 0) { | |
5243 | unlink(t); | |
5244 | free(t); | |
5245 | return r; | |
5246 | } | |
5247 | ||
5248 | if (rename(t, to) < 0) { | |
5249 | r = -errno; | |
5250 | unlink(t); | |
5251 | free(t); | |
5252 | return r; | |
5253 | } | |
5254 | ||
5255 | free(t); | |
5256 | return r; | |
5257 | } | |
5258 | ||
98a28fef LP |
5259 | int audit_session_from_pid(pid_t pid, uint32_t *id) { |
5260 | char *p, *s; | |
5261 | uint32_t u; | |
5262 | int r; | |
5263 | ||
5264 | assert(pid >= 1); | |
5265 | assert(id); | |
5266 | ||
5267 | if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0) | |
5268 | return -ENOENT; | |
5269 | ||
5270 | if (asprintf(&p, "/proc/%lu/sessionid", (unsigned long) pid) < 0) | |
5271 | return -ENOMEM; | |
5272 | ||
5273 | r = read_one_line_file(p, &s); | |
5274 | free(p); | |
5275 | if (r < 0) | |
5276 | return r; | |
5277 | ||
5278 | r = safe_atou32(s, &u); | |
5279 | free(s); | |
5280 | ||
5281 | if (r < 0) | |
5282 | return r; | |
5283 | ||
5284 | if (u == (uint32_t) -1 || u <= 0) | |
5285 | return -ENOENT; | |
5286 | ||
5287 | *id = u; | |
5288 | return 0; | |
5289 | } | |
5290 | ||
4d6d6518 LP |
5291 | bool display_is_local(const char *display) { |
5292 | assert(display); | |
5293 | ||
5294 | return | |
5295 | display[0] == ':' && | |
5296 | display[1] >= '0' && | |
5297 | display[1] <= '9'; | |
5298 | } | |
5299 | ||
5300 | int socket_from_display(const char *display, char **path) { | |
5301 | size_t k; | |
5302 | char *f, *c; | |
5303 | ||
5304 | assert(display); | |
5305 | assert(path); | |
5306 | ||
5307 | if (!display_is_local(display)) | |
5308 | return -EINVAL; | |
5309 | ||
5310 | k = strspn(display+1, "0123456789"); | |
5311 | ||
5312 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
5313 | if (!f) | |
5314 | return -ENOMEM; | |
5315 | ||
5316 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
5317 | memcpy(c, display+1, k); | |
5318 | c[k] = 0; | |
5319 | ||
5320 | *path = f; | |
5321 | ||
5322 | return 0; | |
5323 | } | |
5324 | ||
1cccf435 MV |
5325 | int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home) { |
5326 | struct passwd *p; | |
ddd88763 | 5327 | uid_t u; |
1cccf435 MV |
5328 | |
5329 | assert(username); | |
5330 | assert(*username); | |
1cccf435 MV |
5331 | |
5332 | /* We enforce some special rules for uid=0: in order to avoid | |
5333 | * NSS lookups for root we hardcode its data. */ | |
5334 | ||
5335 | if (streq(*username, "root") || streq(*username, "0")) { | |
5336 | *username = "root"; | |
4b67834e LP |
5337 | |
5338 | if (uid) | |
5339 | *uid = 0; | |
5340 | ||
5341 | if (gid) | |
5342 | *gid = 0; | |
5343 | ||
5344 | if (home) | |
5345 | *home = "/root"; | |
1cccf435 MV |
5346 | return 0; |
5347 | } | |
5348 | ||
ddd88763 | 5349 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 5350 | errno = 0; |
ddd88763 | 5351 | p = getpwuid(u); |
1cccf435 MV |
5352 | |
5353 | /* If there are multiple users with the same id, make | |
5354 | * sure to leave $USER to the configured value instead | |
5355 | * of the first occurrence in the database. However if | |
5356 | * the uid was configured by a numeric uid, then let's | |
5357 | * pick the real username from /etc/passwd. */ | |
5358 | if (p) | |
5359 | *username = p->pw_name; | |
5360 | } else { | |
5361 | errno = 0; | |
5362 | p = getpwnam(*username); | |
5363 | } | |
5364 | ||
5365 | if (!p) | |
5366 | return errno != 0 ? -errno : -ESRCH; | |
5367 | ||
4b67834e LP |
5368 | if (uid) |
5369 | *uid = p->pw_uid; | |
5370 | ||
5371 | if (gid) | |
5372 | *gid = p->pw_gid; | |
5373 | ||
5374 | if (home) | |
5375 | *home = p->pw_dir; | |
5376 | ||
5377 | return 0; | |
5378 | } | |
5379 | ||
5380 | int get_group_creds(const char **groupname, gid_t *gid) { | |
5381 | struct group *g; | |
5382 | gid_t id; | |
5383 | ||
5384 | assert(groupname); | |
5385 | ||
5386 | /* We enforce some special rules for gid=0: in order to avoid | |
5387 | * NSS lookups for root we hardcode its data. */ | |
5388 | ||
5389 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
5390 | *groupname = "root"; | |
5391 | ||
5392 | if (gid) | |
5393 | *gid = 0; | |
5394 | ||
5395 | return 0; | |
5396 | } | |
5397 | ||
5398 | if (parse_gid(*groupname, &id) >= 0) { | |
5399 | errno = 0; | |
5400 | g = getgrgid(id); | |
5401 | ||
5402 | if (g) | |
5403 | *groupname = g->gr_name; | |
5404 | } else { | |
5405 | errno = 0; | |
5406 | g = getgrnam(*groupname); | |
5407 | } | |
5408 | ||
5409 | if (!g) | |
5410 | return errno != 0 ? -errno : -ESRCH; | |
5411 | ||
5412 | if (gid) | |
5413 | *gid = g->gr_gid; | |
5414 | ||
1cccf435 MV |
5415 | return 0; |
5416 | } | |
5417 | ||
8092a428 LP |
5418 | int glob_exists(const char *path) { |
5419 | glob_t g; | |
5420 | int r, k; | |
5421 | ||
5422 | assert(path); | |
5423 | ||
5424 | zero(g); | |
5425 | errno = 0; | |
5426 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
5427 | ||
5428 | if (k == GLOB_NOMATCH) | |
5429 | r = 0; | |
5430 | else if (k == GLOB_NOSPACE) | |
5431 | r = -ENOMEM; | |
5432 | else if (k == 0) | |
5433 | r = !strv_isempty(g.gl_pathv); | |
5434 | else | |
5435 | r = errno ? -errno : -EIO; | |
5436 | ||
5437 | globfree(&g); | |
5438 | ||
5439 | return r; | |
5440 | } | |
5441 | ||
83096483 LP |
5442 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
5443 | struct stat st; | |
5444 | ||
5445 | assert(d); | |
5446 | assert(de); | |
5447 | ||
5448 | if (de->d_type != DT_UNKNOWN) | |
5449 | return 0; | |
5450 | ||
5451 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
5452 | return -errno; | |
5453 | ||
5454 | de->d_type = | |
5455 | S_ISREG(st.st_mode) ? DT_REG : | |
5456 | S_ISDIR(st.st_mode) ? DT_DIR : | |
5457 | S_ISLNK(st.st_mode) ? DT_LNK : | |
5458 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
5459 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
5460 | S_ISCHR(st.st_mode) ? DT_CHR : | |
5461 | S_ISBLK(st.st_mode) ? DT_BLK : | |
5462 | DT_UNKNOWN; | |
5463 | ||
5464 | return 0; | |
5465 | } | |
5466 | ||
5467 | int in_search_path(const char *path, char **search) { | |
5468 | char **i, *parent; | |
5469 | int r; | |
5470 | ||
5471 | r = parent_of_path(path, &parent); | |
5472 | if (r < 0) | |
5473 | return r; | |
5474 | ||
5475 | r = 0; | |
5476 | ||
5477 | STRV_FOREACH(i, search) { | |
5478 | if (path_equal(parent, *i)) { | |
5479 | r = 1; | |
5480 | break; | |
5481 | } | |
5482 | } | |
5483 | ||
5484 | free(parent); | |
5485 | ||
5486 | return r; | |
5487 | } | |
5488 | ||
034a2a52 LP |
5489 | int get_files_in_directory(const char *path, char ***list) { |
5490 | DIR *d; | |
5491 | int r = 0; | |
5492 | unsigned n = 0; | |
5493 | char **l = NULL; | |
5494 | ||
5495 | assert(path); | |
d60ef526 LP |
5496 | |
5497 | /* Returns all files in a directory in *list, and the number | |
5498 | * of files as return value. If list is NULL returns only the | |
5499 | * number */ | |
034a2a52 LP |
5500 | |
5501 | d = opendir(path); | |
5502 | for (;;) { | |
5503 | struct dirent buffer, *de; | |
5504 | int k; | |
5505 | ||
5506 | k = readdir_r(d, &buffer, &de); | |
5507 | if (k != 0) { | |
5508 | r = -k; | |
5509 | goto finish; | |
5510 | } | |
5511 | ||
5512 | if (!de) | |
5513 | break; | |
5514 | ||
5515 | dirent_ensure_type(d, de); | |
5516 | ||
5517 | if (!dirent_is_file(de)) | |
5518 | continue; | |
5519 | ||
d60ef526 LP |
5520 | if (list) { |
5521 | if ((unsigned) r >= n) { | |
5522 | char **t; | |
034a2a52 | 5523 | |
d60ef526 LP |
5524 | n = MAX(16, 2*r); |
5525 | t = realloc(l, sizeof(char*) * n); | |
5526 | if (!t) { | |
5527 | r = -ENOMEM; | |
5528 | goto finish; | |
5529 | } | |
034a2a52 | 5530 | |
d60ef526 LP |
5531 | l = t; |
5532 | } | |
034a2a52 | 5533 | |
d60ef526 | 5534 | assert((unsigned) r < n); |
034a2a52 | 5535 | |
d60ef526 LP |
5536 | l[r] = strdup(de->d_name); |
5537 | if (!l[r]) { | |
5538 | r = -ENOMEM; | |
5539 | goto finish; | |
5540 | } | |
034a2a52 | 5541 | |
d60ef526 LP |
5542 | l[++r] = NULL; |
5543 | } else | |
5544 | r++; | |
034a2a52 LP |
5545 | } |
5546 | ||
5547 | finish: | |
5548 | if (d) | |
5549 | closedir(d); | |
5550 | ||
d60ef526 LP |
5551 | if (r >= 0) { |
5552 | if (list) | |
5553 | *list = l; | |
5554 | } else | |
034a2a52 LP |
5555 | strv_free(l); |
5556 | ||
5557 | return r; | |
5558 | } | |
5559 | ||
911a4828 LP |
5560 | char *join(const char *x, ...) { |
5561 | va_list ap; | |
5562 | size_t l; | |
5563 | char *r, *p; | |
5564 | ||
5565 | va_start(ap, x); | |
5566 | ||
5567 | if (x) { | |
5568 | l = strlen(x); | |
5569 | ||
5570 | for (;;) { | |
5571 | const char *t; | |
5572 | ||
5573 | t = va_arg(ap, const char *); | |
5574 | if (!t) | |
5575 | break; | |
5576 | ||
5577 | l += strlen(t); | |
5578 | } | |
5579 | } else | |
5580 | l = 0; | |
5581 | ||
5582 | va_end(ap); | |
5583 | ||
5584 | r = new(char, l+1); | |
5585 | if (!r) | |
5586 | return NULL; | |
5587 | ||
5588 | if (x) { | |
5589 | p = stpcpy(r, x); | |
5590 | ||
5591 | va_start(ap, x); | |
5592 | ||
5593 | for (;;) { | |
5594 | const char *t; | |
5595 | ||
5596 | t = va_arg(ap, const char *); | |
5597 | if (!t) | |
5598 | break; | |
5599 | ||
5600 | p = stpcpy(p, t); | |
5601 | } | |
5602 | } else | |
5603 | r[0] = 0; | |
5604 | ||
5605 | return r; | |
5606 | } | |
5607 | ||
b636465b LP |
5608 | bool is_main_thread(void) { |
5609 | static __thread int cached = 0; | |
5610 | ||
5611 | if (_unlikely_(cached == 0)) | |
5612 | cached = getpid() == gettid() ? 1 : -1; | |
5613 | ||
5614 | return cached > 0; | |
5615 | } | |
5616 | ||
94959f0f LP |
5617 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
5618 | char *p, *s; | |
5619 | int r; | |
5620 | unsigned n, m; | |
5621 | ||
5622 | assert(ret); | |
5623 | ||
5624 | /* If it has a queue this is good enough for us */ | |
5625 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
5626 | return -ENOMEM; | |
5627 | ||
5628 | r = access(p, F_OK); | |
5629 | free(p); | |
5630 | ||
5631 | if (r >= 0) { | |
5632 | *ret = d; | |
5633 | return 0; | |
5634 | } | |
5635 | ||
5636 | /* If it is a partition find the originating device */ | |
5637 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
5638 | return -ENOMEM; | |
5639 | ||
5640 | r = access(p, F_OK); | |
5641 | free(p); | |
5642 | ||
5643 | if (r < 0) | |
5644 | return -ENOENT; | |
5645 | ||
5646 | /* Get parent dev_t */ | |
5647 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
5648 | return -ENOMEM; | |
5649 | ||
5650 | r = read_one_line_file(p, &s); | |
5651 | free(p); | |
5652 | ||
5653 | if (r < 0) | |
5654 | return r; | |
5655 | ||
5656 | r = sscanf(s, "%u:%u", &m, &n); | |
5657 | free(s); | |
5658 | ||
5659 | if (r != 2) | |
5660 | return -EINVAL; | |
5661 | ||
5662 | /* Only return this if it is really good enough for us. */ | |
5663 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
5664 | return -ENOMEM; | |
5665 | ||
5666 | r = access(p, F_OK); | |
5667 | free(p); | |
5668 | ||
5669 | if (r >= 0) { | |
5670 | *ret = makedev(m, n); | |
5671 | return 0; | |
5672 | } | |
5673 | ||
5674 | return -ENOENT; | |
5675 | } | |
5676 | ||
5677 | ||
f41607a6 LP |
5678 | static const char *const ioprio_class_table[] = { |
5679 | [IOPRIO_CLASS_NONE] = "none", | |
5680 | [IOPRIO_CLASS_RT] = "realtime", | |
5681 | [IOPRIO_CLASS_BE] = "best-effort", | |
5682 | [IOPRIO_CLASS_IDLE] = "idle" | |
5683 | }; | |
5684 | ||
5685 | DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int); | |
5686 | ||
5687 | static const char *const sigchld_code_table[] = { | |
5688 | [CLD_EXITED] = "exited", | |
5689 | [CLD_KILLED] = "killed", | |
5690 | [CLD_DUMPED] = "dumped", | |
5691 | [CLD_TRAPPED] = "trapped", | |
5692 | [CLD_STOPPED] = "stopped", | |
5693 | [CLD_CONTINUED] = "continued", | |
5694 | }; | |
5695 | ||
5696 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
5697 | ||
5698 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
5699 | [LOG_FAC(LOG_KERN)] = "kern", | |
5700 | [LOG_FAC(LOG_USER)] = "user", | |
5701 | [LOG_FAC(LOG_MAIL)] = "mail", | |
5702 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
5703 | [LOG_FAC(LOG_AUTH)] = "auth", | |
5704 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
5705 | [LOG_FAC(LOG_LPR)] = "lpr", | |
5706 | [LOG_FAC(LOG_NEWS)] = "news", | |
5707 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
5708 | [LOG_FAC(LOG_CRON)] = "cron", | |
5709 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
5710 | [LOG_FAC(LOG_FTP)] = "ftp", | |
5711 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
5712 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
5713 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
5714 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
5715 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
5716 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
5717 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
5718 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
5719 | }; | |
5720 | ||
5721 | DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int); | |
5722 | ||
5723 | static const char *const log_level_table[] = { | |
5724 | [LOG_EMERG] = "emerg", | |
5725 | [LOG_ALERT] = "alert", | |
5726 | [LOG_CRIT] = "crit", | |
5727 | [LOG_ERR] = "err", | |
5728 | [LOG_WARNING] = "warning", | |
5729 | [LOG_NOTICE] = "notice", | |
5730 | [LOG_INFO] = "info", | |
5731 | [LOG_DEBUG] = "debug" | |
5732 | }; | |
5733 | ||
5734 | DEFINE_STRING_TABLE_LOOKUP(log_level, int); | |
5735 | ||
5736 | static const char* const sched_policy_table[] = { | |
5737 | [SCHED_OTHER] = "other", | |
5738 | [SCHED_BATCH] = "batch", | |
5739 | [SCHED_IDLE] = "idle", | |
5740 | [SCHED_FIFO] = "fifo", | |
5741 | [SCHED_RR] = "rr" | |
5742 | }; | |
5743 | ||
5744 | DEFINE_STRING_TABLE_LOOKUP(sched_policy, int); | |
5745 | ||
5746 | static const char* const rlimit_table[] = { | |
5747 | [RLIMIT_CPU] = "LimitCPU", | |
5748 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
5749 | [RLIMIT_DATA] = "LimitDATA", | |
5750 | [RLIMIT_STACK] = "LimitSTACK", | |
5751 | [RLIMIT_CORE] = "LimitCORE", | |
5752 | [RLIMIT_RSS] = "LimitRSS", | |
5753 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
5754 | [RLIMIT_AS] = "LimitAS", | |
5755 | [RLIMIT_NPROC] = "LimitNPROC", | |
5756 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
5757 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
5758 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
5759 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
5760 | [RLIMIT_NICE] = "LimitNICE", | |
5761 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
5762 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
5763 | }; | |
5764 | ||
5765 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
5766 | ||
5767 | static const char* const ip_tos_table[] = { | |
5768 | [IPTOS_LOWDELAY] = "low-delay", | |
5769 | [IPTOS_THROUGHPUT] = "throughput", | |
5770 | [IPTOS_RELIABILITY] = "reliability", | |
5771 | [IPTOS_LOWCOST] = "low-cost", | |
5772 | }; | |
5773 | ||
5774 | DEFINE_STRING_TABLE_LOOKUP(ip_tos, int); | |
5775 | ||
5776 | static const char *const signal_table[] = { | |
5777 | [SIGHUP] = "HUP", | |
5778 | [SIGINT] = "INT", | |
5779 | [SIGQUIT] = "QUIT", | |
5780 | [SIGILL] = "ILL", | |
5781 | [SIGTRAP] = "TRAP", | |
5782 | [SIGABRT] = "ABRT", | |
5783 | [SIGBUS] = "BUS", | |
5784 | [SIGFPE] = "FPE", | |
5785 | [SIGKILL] = "KILL", | |
5786 | [SIGUSR1] = "USR1", | |
5787 | [SIGSEGV] = "SEGV", | |
5788 | [SIGUSR2] = "USR2", | |
5789 | [SIGPIPE] = "PIPE", | |
5790 | [SIGALRM] = "ALRM", | |
5791 | [SIGTERM] = "TERM", | |
5792 | #ifdef SIGSTKFLT | |
5793 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
5794 | #endif | |
5795 | [SIGCHLD] = "CHLD", | |
5796 | [SIGCONT] = "CONT", | |
5797 | [SIGSTOP] = "STOP", | |
5798 | [SIGTSTP] = "TSTP", | |
5799 | [SIGTTIN] = "TTIN", | |
5800 | [SIGTTOU] = "TTOU", | |
5801 | [SIGURG] = "URG", | |
5802 | [SIGXCPU] = "XCPU", | |
5803 | [SIGXFSZ] = "XFSZ", | |
5804 | [SIGVTALRM] = "VTALRM", | |
5805 | [SIGPROF] = "PROF", | |
5806 | [SIGWINCH] = "WINCH", | |
5807 | [SIGIO] = "IO", | |
5808 | [SIGPWR] = "PWR", | |
5809 | [SIGSYS] = "SYS" | |
5810 | }; | |
5811 | ||
5812 | DEFINE_STRING_TABLE_LOOKUP(signal, int); |