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Commit | Line | Data |
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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
60918275 LP |
22 | #include <assert.h> |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
85261803 | 26 | #include <stdlib.h> |
034c6ed7 LP |
27 | #include <signal.h> |
28 | #include <stdio.h> | |
1dccbe19 LP |
29 | #include <syslog.h> |
30 | #include <sched.h> | |
31 | #include <sys/resource.h> | |
ef886c6a | 32 | #include <linux/sched.h> |
a9f5d454 LP |
33 | #include <sys/types.h> |
34 | #include <sys/stat.h> | |
3a0ecb08 | 35 | #include <fcntl.h> |
a0d40ac5 | 36 | #include <dirent.h> |
601f6a1e LP |
37 | #include <sys/ioctl.h> |
38 | #include <linux/vt.h> | |
39 | #include <linux/tiocl.h> | |
80876c20 LP |
40 | #include <termios.h> |
41 | #include <stdarg.h> | |
42 | #include <sys/inotify.h> | |
43 | #include <sys/poll.h> | |
8d567588 | 44 | #include <libgen.h> |
3177a7fa | 45 | #include <ctype.h> |
5b6319dc | 46 | #include <sys/prctl.h> |
ef2f1067 LP |
47 | #include <sys/utsname.h> |
48 | #include <pwd.h> | |
4fd5948e | 49 | #include <netinet/ip.h> |
3fe5e5d4 | 50 | #include <linux/kd.h> |
afea26ad | 51 | #include <dlfcn.h> |
2e78aa99 | 52 | #include <sys/wait.h> |
7948c4df | 53 | #include <sys/time.h> |
8092a428 | 54 | #include <glob.h> |
4b67834e | 55 | #include <grp.h> |
87d2c1ff | 56 | #include <sys/mman.h> |
825c6fe5 LP |
57 | #include <sys/vfs.h> |
58 | #include <linux/magic.h> | |
60918275 LP |
59 | |
60 | #include "macro.h" | |
61 | #include "util.h" | |
1dccbe19 LP |
62 | #include "ioprio.h" |
63 | #include "missing.h" | |
a9f5d454 | 64 | #include "log.h" |
65d2ebdc | 65 | #include "strv.h" |
e51bc1a2 | 66 | #include "label.h" |
9eb977db | 67 | #include "path-util.h" |
d06dacd0 | 68 | #include "exit-status.h" |
83cc030f | 69 | #include "hashmap.h" |
56cf987f | 70 | |
9a0e6896 LP |
71 | int saved_argc = 0; |
72 | char **saved_argv = NULL; | |
73 | ||
37f85e66 | 74 | size_t page_size(void) { |
75 | static __thread size_t pgsz = 0; | |
76 | long r; | |
77 | ||
87d2c1ff | 78 | if (_likely_(pgsz > 0)) |
37f85e66 | 79 | return pgsz; |
80 | ||
81 | assert_se((r = sysconf(_SC_PAGESIZE)) > 0); | |
82 | ||
83 | pgsz = (size_t) r; | |
84 | ||
85 | return pgsz; | |
86 | } | |
87 | ||
e05797fb LP |
88 | bool streq_ptr(const char *a, const char *b) { |
89 | ||
90 | /* Like streq(), but tries to make sense of NULL pointers */ | |
91 | ||
92 | if (a && b) | |
93 | return streq(a, b); | |
94 | ||
95 | if (!a && !b) | |
96 | return true; | |
97 | ||
98 | return false; | |
99 | } | |
100 | ||
47be870b | 101 | usec_t now(clockid_t clock_id) { |
60918275 LP |
102 | struct timespec ts; |
103 | ||
47be870b | 104 | assert_se(clock_gettime(clock_id, &ts) == 0); |
60918275 LP |
105 | |
106 | return timespec_load(&ts); | |
107 | } | |
108 | ||
63983207 | 109 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { |
871d7de4 LP |
110 | assert(ts); |
111 | ||
112 | ts->realtime = now(CLOCK_REALTIME); | |
113 | ts->monotonic = now(CLOCK_MONOTONIC); | |
114 | ||
115 | return ts; | |
116 | } | |
117 | ||
a185c5aa LP |
118 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) { |
119 | int64_t delta; | |
120 | assert(ts); | |
121 | ||
122 | ts->realtime = u; | |
123 | ||
124 | if (u == 0) | |
125 | ts->monotonic = 0; | |
126 | else { | |
127 | delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; | |
128 | ||
129 | ts->monotonic = now(CLOCK_MONOTONIC); | |
130 | ||
131 | if ((int64_t) ts->monotonic > delta) | |
132 | ts->monotonic -= delta; | |
133 | else | |
134 | ts->monotonic = 0; | |
135 | } | |
136 | ||
137 | return ts; | |
138 | } | |
139 | ||
60918275 LP |
140 | usec_t timespec_load(const struct timespec *ts) { |
141 | assert(ts); | |
142 | ||
143 | return | |
144 | (usec_t) ts->tv_sec * USEC_PER_SEC + | |
145 | (usec_t) ts->tv_nsec / NSEC_PER_USEC; | |
146 | } | |
147 | ||
148 | struct timespec *timespec_store(struct timespec *ts, usec_t u) { | |
149 | assert(ts); | |
150 | ||
151 | ts->tv_sec = (time_t) (u / USEC_PER_SEC); | |
152 | ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); | |
153 | ||
154 | return ts; | |
155 | } | |
156 | ||
157 | usec_t timeval_load(const struct timeval *tv) { | |
158 | assert(tv); | |
159 | ||
160 | return | |
161 | (usec_t) tv->tv_sec * USEC_PER_SEC + | |
162 | (usec_t) tv->tv_usec; | |
163 | } | |
164 | ||
165 | struct timeval *timeval_store(struct timeval *tv, usec_t u) { | |
166 | assert(tv); | |
167 | ||
168 | tv->tv_sec = (time_t) (u / USEC_PER_SEC); | |
169 | tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); | |
170 | ||
171 | return tv; | |
172 | } | |
173 | ||
174 | bool endswith(const char *s, const char *postfix) { | |
175 | size_t sl, pl; | |
176 | ||
177 | assert(s); | |
178 | assert(postfix); | |
179 | ||
180 | sl = strlen(s); | |
181 | pl = strlen(postfix); | |
182 | ||
d4d0d4db LP |
183 | if (pl == 0) |
184 | return true; | |
185 | ||
60918275 LP |
186 | if (sl < pl) |
187 | return false; | |
188 | ||
189 | return memcmp(s + sl - pl, postfix, pl) == 0; | |
190 | } | |
191 | ||
192 | bool startswith(const char *s, const char *prefix) { | |
193 | size_t sl, pl; | |
194 | ||
195 | assert(s); | |
196 | assert(prefix); | |
197 | ||
198 | sl = strlen(s); | |
199 | pl = strlen(prefix); | |
200 | ||
d4d0d4db LP |
201 | if (pl == 0) |
202 | return true; | |
203 | ||
60918275 LP |
204 | if (sl < pl) |
205 | return false; | |
206 | ||
207 | return memcmp(s, prefix, pl) == 0; | |
208 | } | |
209 | ||
3177a7fa MAP |
210 | bool startswith_no_case(const char *s, const char *prefix) { |
211 | size_t sl, pl; | |
212 | unsigned i; | |
213 | ||
214 | assert(s); | |
215 | assert(prefix); | |
216 | ||
217 | sl = strlen(s); | |
218 | pl = strlen(prefix); | |
219 | ||
220 | if (pl == 0) | |
221 | return true; | |
222 | ||
223 | if (sl < pl) | |
224 | return false; | |
225 | ||
226 | for(i = 0; i < pl; ++i) { | |
227 | if (tolower(s[i]) != tolower(prefix[i])) | |
228 | return false; | |
229 | } | |
230 | ||
231 | return true; | |
232 | } | |
233 | ||
79d6d816 LP |
234 | bool first_word(const char *s, const char *word) { |
235 | size_t sl, wl; | |
236 | ||
237 | assert(s); | |
238 | assert(word); | |
239 | ||
240 | sl = strlen(s); | |
241 | wl = strlen(word); | |
242 | ||
243 | if (sl < wl) | |
244 | return false; | |
245 | ||
d4d0d4db LP |
246 | if (wl == 0) |
247 | return true; | |
248 | ||
79d6d816 LP |
249 | if (memcmp(s, word, wl) != 0) |
250 | return false; | |
251 | ||
d4d0d4db LP |
252 | return s[wl] == 0 || |
253 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
254 | } |
255 | ||
42f4e3c4 | 256 | int close_nointr(int fd) { |
60918275 LP |
257 | assert(fd >= 0); |
258 | ||
259 | for (;;) { | |
260 | int r; | |
261 | ||
48f82119 LP |
262 | r = close(fd); |
263 | if (r >= 0) | |
60918275 LP |
264 | return r; |
265 | ||
266 | if (errno != EINTR) | |
48f82119 | 267 | return -errno; |
60918275 LP |
268 | } |
269 | } | |
85261803 | 270 | |
85f136b5 | 271 | void close_nointr_nofail(int fd) { |
80876c20 | 272 | int saved_errno = errno; |
85f136b5 LP |
273 | |
274 | /* like close_nointr() but cannot fail, and guarantees errno | |
275 | * is unchanged */ | |
276 | ||
277 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
278 | |
279 | errno = saved_errno; | |
85f136b5 LP |
280 | } |
281 | ||
5b6319dc LP |
282 | void close_many(const int fds[], unsigned n_fd) { |
283 | unsigned i; | |
284 | ||
285 | for (i = 0; i < n_fd; i++) | |
286 | close_nointr_nofail(fds[i]); | |
287 | } | |
288 | ||
85261803 LP |
289 | int parse_boolean(const char *v) { |
290 | assert(v); | |
291 | ||
44d8db9e | 292 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on")) |
85261803 | 293 | return 1; |
44d8db9e | 294 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off")) |
85261803 LP |
295 | return 0; |
296 | ||
297 | return -EINVAL; | |
298 | } | |
299 | ||
3ba686c1 | 300 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 301 | unsigned long ul = 0; |
3ba686c1 LP |
302 | pid_t pid; |
303 | int r; | |
304 | ||
305 | assert(s); | |
306 | assert(ret_pid); | |
307 | ||
308 | if ((r = safe_atolu(s, &ul)) < 0) | |
309 | return r; | |
310 | ||
311 | pid = (pid_t) ul; | |
312 | ||
313 | if ((unsigned long) pid != ul) | |
314 | return -ERANGE; | |
315 | ||
316 | if (pid <= 0) | |
317 | return -ERANGE; | |
318 | ||
319 | *ret_pid = pid; | |
320 | return 0; | |
321 | } | |
322 | ||
034a2a52 LP |
323 | int parse_uid(const char *s, uid_t* ret_uid) { |
324 | unsigned long ul = 0; | |
325 | uid_t uid; | |
326 | int r; | |
327 | ||
328 | assert(s); | |
329 | assert(ret_uid); | |
330 | ||
331 | if ((r = safe_atolu(s, &ul)) < 0) | |
332 | return r; | |
333 | ||
334 | uid = (uid_t) ul; | |
335 | ||
336 | if ((unsigned long) uid != ul) | |
337 | return -ERANGE; | |
338 | ||
339 | *ret_uid = uid; | |
340 | return 0; | |
341 | } | |
342 | ||
85261803 LP |
343 | int safe_atou(const char *s, unsigned *ret_u) { |
344 | char *x = NULL; | |
034c6ed7 | 345 | unsigned long l; |
85261803 LP |
346 | |
347 | assert(s); | |
348 | assert(ret_u); | |
349 | ||
350 | errno = 0; | |
351 | l = strtoul(s, &x, 0); | |
352 | ||
353 | if (!x || *x || errno) | |
354 | return errno ? -errno : -EINVAL; | |
355 | ||
034c6ed7 | 356 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
357 | return -ERANGE; |
358 | ||
359 | *ret_u = (unsigned) l; | |
360 | return 0; | |
361 | } | |
362 | ||
363 | int safe_atoi(const char *s, int *ret_i) { | |
364 | char *x = NULL; | |
034c6ed7 | 365 | long l; |
85261803 LP |
366 | |
367 | assert(s); | |
368 | assert(ret_i); | |
369 | ||
370 | errno = 0; | |
371 | l = strtol(s, &x, 0); | |
372 | ||
373 | if (!x || *x || errno) | |
374 | return errno ? -errno : -EINVAL; | |
375 | ||
034c6ed7 | 376 | if ((long) (int) l != l) |
85261803 LP |
377 | return -ERANGE; |
378 | ||
034c6ed7 LP |
379 | *ret_i = (int) l; |
380 | return 0; | |
381 | } | |
382 | ||
034c6ed7 LP |
383 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
384 | char *x = NULL; | |
385 | unsigned long long l; | |
386 | ||
387 | assert(s); | |
388 | assert(ret_llu); | |
389 | ||
390 | errno = 0; | |
391 | l = strtoull(s, &x, 0); | |
392 | ||
393 | if (!x || *x || errno) | |
394 | return errno ? -errno : -EINVAL; | |
395 | ||
396 | *ret_llu = l; | |
397 | return 0; | |
398 | } | |
399 | ||
400 | int safe_atolli(const char *s, long long int *ret_lli) { | |
401 | char *x = NULL; | |
402 | long long l; | |
403 | ||
404 | assert(s); | |
405 | assert(ret_lli); | |
406 | ||
407 | errno = 0; | |
408 | l = strtoll(s, &x, 0); | |
409 | ||
410 | if (!x || *x || errno) | |
411 | return errno ? -errno : -EINVAL; | |
412 | ||
413 | *ret_lli = l; | |
85261803 LP |
414 | return 0; |
415 | } | |
a41e8209 | 416 | |
a41e8209 | 417 | /* Split a string into words. */ |
65d2ebdc | 418 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
419 | char *current; |
420 | ||
421 | current = *state ? *state : (char*) c; | |
422 | ||
423 | if (!*current || *c == 0) | |
424 | return NULL; | |
425 | ||
65d2ebdc LP |
426 | current += strspn(current, separator); |
427 | *l = strcspn(current, separator); | |
82919e3d LP |
428 | *state = current+*l; |
429 | ||
430 | return (char*) current; | |
431 | } | |
432 | ||
034c6ed7 LP |
433 | /* Split a string into words, but consider strings enclosed in '' and |
434 | * "" as words even if they include spaces. */ | |
435 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
436 | char *current, *e; |
437 | bool escaped = false; | |
034c6ed7 LP |
438 | |
439 | current = *state ? *state : (char*) c; | |
440 | ||
441 | if (!*current || *c == 0) | |
442 | return NULL; | |
443 | ||
444 | current += strspn(current, WHITESPACE); | |
445 | ||
446 | if (*current == '\'') { | |
447 | current ++; | |
034c6ed7 | 448 | |
0bab36f2 LP |
449 | for (e = current; *e; e++) { |
450 | if (escaped) | |
451 | escaped = false; | |
452 | else if (*e == '\\') | |
453 | escaped = true; | |
454 | else if (*e == '\'') | |
455 | break; | |
456 | } | |
457 | ||
458 | *l = e-current; | |
459 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
460 | } else if (*current == '\"') { |
461 | current ++; | |
034c6ed7 | 462 | |
0bab36f2 LP |
463 | for (e = current; *e; e++) { |
464 | if (escaped) | |
465 | escaped = false; | |
466 | else if (*e == '\\') | |
467 | escaped = true; | |
468 | else if (*e == '\"') | |
469 | break; | |
470 | } | |
471 | ||
472 | *l = e-current; | |
473 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 474 | } else { |
0bab36f2 LP |
475 | for (e = current; *e; e++) { |
476 | if (escaped) | |
477 | escaped = false; | |
478 | else if (*e == '\\') | |
479 | escaped = true; | |
480 | else if (strchr(WHITESPACE, *e)) | |
481 | break; | |
482 | } | |
483 | *l = e-current; | |
484 | *state = e; | |
034c6ed7 LP |
485 | } |
486 | ||
487 | return (char*) current; | |
488 | } | |
489 | ||
034c6ed7 LP |
490 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
491 | int r; | |
492 | FILE *f; | |
20c03b7b | 493 | char fn[PATH_MAX], line[LINE_MAX], *p; |
bb00e604 | 494 | long unsigned ppid; |
034c6ed7 | 495 | |
8480e784 | 496 | assert(pid > 0); |
034c6ed7 LP |
497 | assert(_ppid); |
498 | ||
bb00e604 | 499 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
8480e784 | 500 | char_array_0(fn); |
034c6ed7 | 501 | |
ccaa6149 | 502 | if (!(f = fopen(fn, "re"))) |
034c6ed7 LP |
503 | return -errno; |
504 | ||
505 | if (!(fgets(line, sizeof(line), f))) { | |
35d50f55 | 506 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
507 | fclose(f); |
508 | return r; | |
509 | } | |
510 | ||
511 | fclose(f); | |
512 | ||
513 | /* Let's skip the pid and comm fields. The latter is enclosed | |
514 | * in () but does not escape any () in its value, so let's | |
515 | * skip over it manually */ | |
516 | ||
517 | if (!(p = strrchr(line, ')'))) | |
518 | return -EIO; | |
519 | ||
520 | p++; | |
521 | ||
522 | if (sscanf(p, " " | |
523 | "%*c " /* state */ | |
bb00e604 | 524 | "%lu ", /* ppid */ |
034c6ed7 LP |
525 | &ppid) != 1) |
526 | return -EIO; | |
527 | ||
bb00e604 | 528 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
529 | return -ERANGE; |
530 | ||
531 | *_ppid = (pid_t) ppid; | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
7640a5de LP |
536 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
537 | int r; | |
538 | FILE *f; | |
539 | char fn[PATH_MAX], line[LINE_MAX], *p; | |
540 | ||
541 | assert(pid > 0); | |
542 | assert(st); | |
543 | ||
544 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); | |
545 | char_array_0(fn); | |
546 | ||
ccaa6149 | 547 | if (!(f = fopen(fn, "re"))) |
7640a5de LP |
548 | return -errno; |
549 | ||
550 | if (!(fgets(line, sizeof(line), f))) { | |
35d50f55 | 551 | r = feof(f) ? -EIO : -errno; |
7640a5de LP |
552 | fclose(f); |
553 | return r; | |
554 | } | |
555 | ||
556 | fclose(f); | |
557 | ||
558 | /* Let's skip the pid and comm fields. The latter is enclosed | |
559 | * in () but does not escape any () in its value, so let's | |
560 | * skip over it manually */ | |
561 | ||
562 | if (!(p = strrchr(line, ')'))) | |
563 | return -EIO; | |
564 | ||
565 | p++; | |
566 | ||
567 | if (sscanf(p, " " | |
568 | "%*c " /* state */ | |
569 | "%*d " /* ppid */ | |
570 | "%*d " /* pgrp */ | |
571 | "%*d " /* session */ | |
572 | "%*d " /* tty_nr */ | |
573 | "%*d " /* tpgid */ | |
574 | "%*u " /* flags */ | |
575 | "%*u " /* minflt */ | |
576 | "%*u " /* cminflt */ | |
577 | "%*u " /* majflt */ | |
578 | "%*u " /* cmajflt */ | |
579 | "%*u " /* utime */ | |
580 | "%*u " /* stime */ | |
581 | "%*d " /* cutime */ | |
582 | "%*d " /* cstime */ | |
583 | "%*d " /* priority */ | |
584 | "%*d " /* nice */ | |
585 | "%*d " /* num_threads */ | |
586 | "%*d " /* itrealvalue */ | |
587 | "%llu " /* starttime */, | |
588 | st) != 1) | |
589 | return -EIO; | |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
034c6ed7 LP |
594 | int write_one_line_file(const char *fn, const char *line) { |
595 | FILE *f; | |
596 | int r; | |
597 | ||
598 | assert(fn); | |
599 | assert(line); | |
600 | ||
03ad1136 LP |
601 | f = fopen(fn, "we"); |
602 | if (!f) | |
034c6ed7 LP |
603 | return -errno; |
604 | ||
34ca941c | 605 | errno = 0; |
034c6ed7 LP |
606 | if (fputs(line, f) < 0) { |
607 | r = -errno; | |
608 | goto finish; | |
609 | } | |
610 | ||
8e1bd70d LP |
611 | if (!endswith(line, "\n")) |
612 | fputc('\n', f); | |
613 | ||
151b190e LP |
614 | fflush(f); |
615 | ||
616 | if (ferror(f)) { | |
617 | if (errno != 0) | |
618 | r = -errno; | |
619 | else | |
620 | r = -EIO; | |
621 | } else | |
622 | r = 0; | |
623 | ||
034c6ed7 LP |
624 | finish: |
625 | fclose(f); | |
626 | return r; | |
627 | } | |
628 | ||
34ca941c LP |
629 | int fchmod_umask(int fd, mode_t m) { |
630 | mode_t u; | |
631 | int r; | |
632 | ||
633 | u = umask(0777); | |
634 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
635 | umask(u); | |
636 | ||
637 | return r; | |
638 | } | |
639 | ||
640 | int write_one_line_file_atomic(const char *fn, const char *line) { | |
641 | FILE *f; | |
642 | int r; | |
643 | char *p; | |
644 | ||
645 | assert(fn); | |
646 | assert(line); | |
647 | ||
648 | r = fopen_temporary(fn, &f, &p); | |
649 | if (r < 0) | |
650 | return r; | |
651 | ||
652 | fchmod_umask(fileno(f), 0644); | |
653 | ||
654 | errno = 0; | |
655 | if (fputs(line, f) < 0) { | |
656 | r = -errno; | |
657 | goto finish; | |
658 | } | |
659 | ||
660 | if (!endswith(line, "\n")) | |
661 | fputc('\n', f); | |
662 | ||
663 | fflush(f); | |
664 | ||
665 | if (ferror(f)) { | |
666 | if (errno != 0) | |
667 | r = -errno; | |
668 | else | |
669 | r = -EIO; | |
670 | } else { | |
671 | if (rename(p, fn) < 0) | |
672 | r = -errno; | |
673 | else | |
674 | r = 0; | |
675 | } | |
676 | ||
677 | finish: | |
678 | if (r < 0) | |
679 | unlink(p); | |
680 | ||
681 | fclose(f); | |
682 | free(p); | |
683 | ||
684 | return r; | |
685 | } | |
686 | ||
034c6ed7 LP |
687 | int read_one_line_file(const char *fn, char **line) { |
688 | FILE *f; | |
689 | int r; | |
97c4a07d | 690 | char t[LINE_MAX], *c; |
034c6ed7 LP |
691 | |
692 | assert(fn); | |
693 | assert(line); | |
694 | ||
4099a281 LP |
695 | f = fopen(fn, "re"); |
696 | if (!f) | |
034c6ed7 LP |
697 | return -errno; |
698 | ||
4099a281 LP |
699 | if (!fgets(t, sizeof(t), f)) { |
700 | ||
701 | if (ferror(f)) { | |
702 | r = -errno; | |
703 | goto finish; | |
704 | } | |
705 | ||
706 | t[0] = 0; | |
034c6ed7 LP |
707 | } |
708 | ||
4099a281 LP |
709 | c = strdup(t); |
710 | if (!c) { | |
034c6ed7 LP |
711 | r = -ENOMEM; |
712 | goto finish; | |
713 | } | |
714 | ||
6f9a471a LP |
715 | truncate_nl(c); |
716 | ||
034c6ed7 LP |
717 | *line = c; |
718 | r = 0; | |
719 | ||
720 | finish: | |
721 | fclose(f); | |
722 | return r; | |
723 | } | |
44d8db9e | 724 | |
34ca941c | 725 | int read_full_file(const char *fn, char **contents, size_t *size) { |
97c4a07d LP |
726 | FILE *f; |
727 | int r; | |
728 | size_t n, l; | |
729 | char *buf = NULL; | |
730 | struct stat st; | |
731 | ||
732 | if (!(f = fopen(fn, "re"))) | |
733 | return -errno; | |
734 | ||
735 | if (fstat(fileno(f), &st) < 0) { | |
736 | r = -errno; | |
737 | goto finish; | |
738 | } | |
739 | ||
34ca941c LP |
740 | /* Safety check */ |
741 | if (st.st_size > 4*1024*1024) { | |
742 | r = -E2BIG; | |
743 | goto finish; | |
744 | } | |
745 | ||
97c4a07d LP |
746 | n = st.st_size > 0 ? st.st_size : LINE_MAX; |
747 | l = 0; | |
748 | ||
749 | for (;;) { | |
750 | char *t; | |
751 | size_t k; | |
752 | ||
753 | if (!(t = realloc(buf, n+1))) { | |
754 | r = -ENOMEM; | |
755 | goto finish; | |
756 | } | |
757 | ||
758 | buf = t; | |
759 | k = fread(buf + l, 1, n - l, f); | |
760 | ||
761 | if (k <= 0) { | |
762 | if (ferror(f)) { | |
763 | r = -errno; | |
764 | goto finish; | |
765 | } | |
766 | ||
767 | break; | |
768 | } | |
769 | ||
770 | l += k; | |
771 | n *= 2; | |
772 | ||
773 | /* Safety check */ | |
774 | if (n > 4*1024*1024) { | |
775 | r = -E2BIG; | |
776 | goto finish; | |
777 | } | |
778 | } | |
779 | ||
f8440af5 | 780 | buf[l] = 0; |
97c4a07d LP |
781 | *contents = buf; |
782 | buf = NULL; | |
783 | ||
34ca941c LP |
784 | if (size) |
785 | *size = l; | |
786 | ||
97c4a07d LP |
787 | r = 0; |
788 | ||
789 | finish: | |
790 | fclose(f); | |
791 | free(buf); | |
792 | ||
793 | return r; | |
794 | } | |
795 | ||
796 | int parse_env_file( | |
797 | const char *fname, | |
c899f8c6 | 798 | const char *separator, ...) { |
97c4a07d | 799 | |
ce8a6aa1 | 800 | int r = 0; |
44d91056 | 801 | char *contents = NULL, *p; |
97c4a07d LP |
802 | |
803 | assert(fname); | |
c899f8c6 | 804 | assert(separator); |
97c4a07d | 805 | |
34ca941c | 806 | if ((r = read_full_file(fname, &contents, NULL)) < 0) |
97c4a07d LP |
807 | return r; |
808 | ||
809 | p = contents; | |
810 | for (;;) { | |
811 | const char *key = NULL; | |
812 | ||
c899f8c6 | 813 | p += strspn(p, separator); |
97c4a07d LP |
814 | p += strspn(p, WHITESPACE); |
815 | ||
816 | if (!*p) | |
817 | break; | |
818 | ||
819 | if (!strchr(COMMENTS, *p)) { | |
820 | va_list ap; | |
821 | char **value; | |
822 | ||
c899f8c6 | 823 | va_start(ap, separator); |
97c4a07d LP |
824 | while ((key = va_arg(ap, char *))) { |
825 | size_t n; | |
826 | char *v; | |
827 | ||
828 | value = va_arg(ap, char **); | |
829 | ||
830 | n = strlen(key); | |
831 | if (strncmp(p, key, n) != 0 || | |
832 | p[n] != '=') | |
833 | continue; | |
834 | ||
835 | p += n + 1; | |
c899f8c6 | 836 | n = strcspn(p, separator); |
97c4a07d LP |
837 | |
838 | if (n >= 2 && | |
e7db37dd LP |
839 | strchr(QUOTES, p[0]) && |
840 | p[n-1] == p[0]) | |
97c4a07d LP |
841 | v = strndup(p+1, n-2); |
842 | else | |
843 | v = strndup(p, n); | |
844 | ||
845 | if (!v) { | |
846 | r = -ENOMEM; | |
847 | va_end(ap); | |
848 | goto fail; | |
849 | } | |
850 | ||
dd36de4d KS |
851 | if (v[0] == '\0') { |
852 | /* return empty value strings as NULL */ | |
853 | free(v); | |
854 | v = NULL; | |
855 | } | |
856 | ||
97c4a07d LP |
857 | free(*value); |
858 | *value = v; | |
859 | ||
860 | p += n; | |
ce8a6aa1 LP |
861 | |
862 | r ++; | |
97c4a07d LP |
863 | break; |
864 | } | |
865 | va_end(ap); | |
866 | } | |
867 | ||
868 | if (!key) | |
c899f8c6 | 869 | p += strcspn(p, separator); |
97c4a07d LP |
870 | } |
871 | ||
97c4a07d LP |
872 | fail: |
873 | free(contents); | |
874 | return r; | |
875 | } | |
876 | ||
8c7be95e LP |
877 | int load_env_file( |
878 | const char *fname, | |
879 | char ***rl) { | |
880 | ||
881 | FILE *f; | |
6a39419f | 882 | char **m = NULL; |
8c7be95e LP |
883 | int r; |
884 | ||
885 | assert(fname); | |
886 | assert(rl); | |
887 | ||
888 | if (!(f = fopen(fname, "re"))) | |
889 | return -errno; | |
890 | ||
891 | while (!feof(f)) { | |
892 | char l[LINE_MAX], *p, *u; | |
893 | char **t; | |
894 | ||
895 | if (!fgets(l, sizeof(l), f)) { | |
896 | if (feof(f)) | |
897 | break; | |
898 | ||
899 | r = -errno; | |
900 | goto finish; | |
901 | } | |
902 | ||
903 | p = strstrip(l); | |
904 | ||
905 | if (!*p) | |
906 | continue; | |
907 | ||
908 | if (strchr(COMMENTS, *p)) | |
909 | continue; | |
910 | ||
911 | if (!(u = normalize_env_assignment(p))) { | |
0d0f0c50 | 912 | r = log_oom(); |
8c7be95e LP |
913 | goto finish; |
914 | } | |
915 | ||
916 | t = strv_append(m, u); | |
917 | free(u); | |
918 | ||
919 | if (!t) { | |
0d0f0c50 | 920 | r = log_oom(); |
8c7be95e LP |
921 | goto finish; |
922 | } | |
923 | ||
924 | strv_free(m); | |
925 | m = t; | |
926 | } | |
927 | ||
928 | r = 0; | |
929 | ||
930 | *rl = m; | |
931 | m = NULL; | |
932 | ||
933 | finish: | |
934 | if (f) | |
935 | fclose(f); | |
936 | ||
937 | strv_free(m); | |
938 | ||
939 | return r; | |
940 | } | |
941 | ||
7640a5de | 942 | int write_env_file(const char *fname, char **l) { |
34ca941c | 943 | char **i, *p; |
7640a5de LP |
944 | FILE *f; |
945 | int r; | |
946 | ||
34ca941c LP |
947 | r = fopen_temporary(fname, &f, &p); |
948 | if (r < 0) | |
949 | return r; | |
7640a5de | 950 | |
34ca941c LP |
951 | fchmod_umask(fileno(f), 0644); |
952 | ||
953 | errno = 0; | |
7640a5de LP |
954 | STRV_FOREACH(i, l) { |
955 | fputs(*i, f); | |
956 | fputc('\n', f); | |
957 | } | |
958 | ||
959 | fflush(f); | |
960 | ||
34ca941c LP |
961 | if (ferror(f)) { |
962 | if (errno != 0) | |
963 | r = -errno; | |
964 | else | |
965 | r = -EIO; | |
966 | } else { | |
967 | if (rename(p, fname) < 0) | |
968 | r = -errno; | |
969 | else | |
970 | r = 0; | |
971 | } | |
972 | ||
973 | if (r < 0) | |
974 | unlink(p); | |
975 | ||
7640a5de | 976 | fclose(f); |
34ca941c | 977 | free(p); |
7640a5de LP |
978 | |
979 | return r; | |
980 | } | |
981 | ||
7072ced8 LP |
982 | char *truncate_nl(char *s) { |
983 | assert(s); | |
984 | ||
985 | s[strcspn(s, NEWLINE)] = 0; | |
986 | return s; | |
987 | } | |
988 | ||
87d2c1ff | 989 | int get_process_comm(pid_t pid, char **name) { |
7072ced8 LP |
990 | int r; |
991 | ||
7072ced8 LP |
992 | assert(name); |
993 | ||
87d2c1ff LP |
994 | if (pid == 0) |
995 | r = read_one_line_file("/proc/self/comm", name); | |
996 | else { | |
997 | char *p; | |
998 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) | |
999 | return -ENOMEM; | |
7072ced8 | 1000 | |
87d2c1ff LP |
1001 | r = read_one_line_file(p, name); |
1002 | free(p); | |
1003 | } | |
7072ced8 | 1004 | |
87d2c1ff | 1005 | return r; |
7072ced8 LP |
1006 | } |
1007 | ||
87d2c1ff LP |
1008 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
1009 | char *r, *k; | |
c59760ee LP |
1010 | int c; |
1011 | bool space = false; | |
1012 | size_t left; | |
1013 | FILE *f; | |
1014 | ||
c59760ee LP |
1015 | assert(max_length > 0); |
1016 | assert(line); | |
1017 | ||
87d2c1ff LP |
1018 | if (pid == 0) |
1019 | f = fopen("/proc/self/cmdline", "re"); | |
1020 | else { | |
1021 | char *p; | |
1022 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1023 | return -ENOMEM; | |
c59760ee | 1024 | |
87d2c1ff LP |
1025 | f = fopen(p, "re"); |
1026 | free(p); | |
1027 | } | |
c59760ee LP |
1028 | |
1029 | if (!f) | |
1030 | return -errno; | |
1031 | ||
87d2c1ff LP |
1032 | r = new(char, max_length); |
1033 | if (!r) { | |
c59760ee LP |
1034 | fclose(f); |
1035 | return -ENOMEM; | |
1036 | } | |
1037 | ||
1038 | k = r; | |
1039 | left = max_length; | |
1040 | while ((c = getc(f)) != EOF) { | |
1041 | ||
1042 | if (isprint(c)) { | |
1043 | if (space) { | |
1044 | if (left <= 4) | |
1045 | break; | |
1046 | ||
1047 | *(k++) = ' '; | |
057fbb58 | 1048 | left--; |
c59760ee LP |
1049 | space = false; |
1050 | } | |
1051 | ||
1052 | if (left <= 4) | |
1053 | break; | |
1054 | ||
1055 | *(k++) = (char) c; | |
057fbb58 | 1056 | left--; |
c59760ee LP |
1057 | } else |
1058 | space = true; | |
1059 | } | |
1060 | ||
1061 | if (left <= 4) { | |
1062 | size_t n = MIN(left-1, 3U); | |
1063 | memcpy(k, "...", n); | |
1064 | k[n] = 0; | |
1065 | } else | |
1066 | *k = 0; | |
1067 | ||
1068 | fclose(f); | |
1069 | ||
35d2e7ec LP |
1070 | /* Kernel threads have no argv[] */ |
1071 | if (r[0] == 0) { | |
1072 | char *t; | |
1073 | int h; | |
1074 | ||
1075 | free(r); | |
1076 | ||
87d2c1ff LP |
1077 | if (!comm_fallback) |
1078 | return -ENOENT; | |
1079 | ||
1080 | h = get_process_comm(pid, &t); | |
1081 | if (h < 0) | |
35d2e7ec LP |
1082 | return h; |
1083 | ||
b7def684 | 1084 | r = strjoin("[", t, "]", NULL); |
35d2e7ec LP |
1085 | free(t); |
1086 | ||
87d2c1ff | 1087 | if (!r) |
35d2e7ec LP |
1088 | return -ENOMEM; |
1089 | } | |
fa776d8e | 1090 | |
c59760ee LP |
1091 | *line = r; |
1092 | return 0; | |
1093 | } | |
1094 | ||
1e5678d0 LP |
1095 | int is_kernel_thread(pid_t pid) { |
1096 | char *p; | |
1097 | size_t count; | |
1098 | char c; | |
1099 | bool eof; | |
1100 | FILE *f; | |
1101 | ||
1102 | if (pid == 0) | |
1103 | return 0; | |
1104 | ||
1105 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1106 | return -ENOMEM; | |
1107 | ||
1108 | f = fopen(p, "re"); | |
1109 | free(p); | |
1110 | ||
1111 | if (!f) | |
1112 | return -errno; | |
1113 | ||
1114 | count = fread(&c, 1, 1, f); | |
1115 | eof = feof(f); | |
1116 | fclose(f); | |
1117 | ||
1118 | /* Kernel threads have an empty cmdline */ | |
1119 | ||
1120 | if (count <= 0) | |
1121 | return eof ? 1 : -errno; | |
1122 | ||
1123 | return 0; | |
1124 | } | |
1125 | ||
87d2c1ff LP |
1126 | int get_process_exe(pid_t pid, char **name) { |
1127 | int r; | |
1128 | ||
1129 | assert(name); | |
1130 | ||
1131 | if (pid == 0) | |
1132 | r = readlink_malloc("/proc/self/exe", name); | |
1133 | else { | |
1134 | char *p; | |
1135 | if (asprintf(&p, "/proc/%lu/exe", (unsigned long) pid) < 0) | |
1136 | return -ENOMEM; | |
1137 | ||
1138 | r = readlink_malloc(p, name); | |
1139 | free(p); | |
1140 | } | |
1141 | ||
1142 | return r; | |
1143 | } | |
1144 | ||
7e4ab3c5 LP |
1145 | int get_process_uid(pid_t pid, uid_t *uid) { |
1146 | char *p; | |
1147 | FILE *f; | |
1148 | int r; | |
1149 | ||
1150 | assert(uid); | |
1151 | ||
1152 | if (pid == 0) | |
1153 | return getuid(); | |
1154 | ||
1155 | if (asprintf(&p, "/proc/%lu/status", (unsigned long) pid) < 0) | |
1156 | return -ENOMEM; | |
1157 | ||
1158 | f = fopen(p, "re"); | |
1159 | free(p); | |
1160 | ||
1161 | if (!f) | |
1162 | return -errno; | |
1163 | ||
1164 | while (!feof(f)) { | |
1165 | char line[LINE_MAX], *l; | |
1166 | ||
1167 | if (!fgets(line, sizeof(line), f)) { | |
1168 | if (feof(f)) | |
1169 | break; | |
1170 | ||
1171 | r = -errno; | |
1172 | goto finish; | |
1173 | } | |
1174 | ||
1175 | l = strstrip(line); | |
1176 | ||
1177 | if (startswith(l, "Uid:")) { | |
1178 | l += 4; | |
1179 | l += strspn(l, WHITESPACE); | |
1180 | ||
1181 | l[strcspn(l, WHITESPACE)] = 0; | |
1182 | ||
1183 | r = parse_uid(l, uid); | |
1184 | goto finish; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | r = -EIO; | |
1189 | ||
1190 | finish: | |
1191 | fclose(f); | |
1192 | ||
1193 | return r; | |
1194 | } | |
1195 | ||
fab56fc5 LP |
1196 | char *strnappend(const char *s, const char *suffix, size_t b) { |
1197 | size_t a; | |
44d8db9e LP |
1198 | char *r; |
1199 | ||
fab56fc5 LP |
1200 | if (!s && !suffix) |
1201 | return strdup(""); | |
1202 | ||
1203 | if (!s) | |
1204 | return strndup(suffix, b); | |
1205 | ||
1206 | if (!suffix) | |
1207 | return strdup(s); | |
1208 | ||
44d8db9e LP |
1209 | assert(s); |
1210 | assert(suffix); | |
1211 | ||
1212 | a = strlen(s); | |
44d8db9e LP |
1213 | |
1214 | if (!(r = new(char, a+b+1))) | |
1215 | return NULL; | |
1216 | ||
1217 | memcpy(r, s, a); | |
1218 | memcpy(r+a, suffix, b); | |
1219 | r[a+b] = 0; | |
1220 | ||
1221 | return r; | |
1222 | } | |
87f0e418 | 1223 | |
fab56fc5 LP |
1224 | char *strappend(const char *s, const char *suffix) { |
1225 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
1226 | } | |
1227 | ||
87f0e418 LP |
1228 | int readlink_malloc(const char *p, char **r) { |
1229 | size_t l = 100; | |
1230 | ||
1231 | assert(p); | |
1232 | assert(r); | |
1233 | ||
1234 | for (;;) { | |
1235 | char *c; | |
1236 | ssize_t n; | |
1237 | ||
1238 | if (!(c = new(char, l))) | |
1239 | return -ENOMEM; | |
1240 | ||
1241 | if ((n = readlink(p, c, l-1)) < 0) { | |
1242 | int ret = -errno; | |
1243 | free(c); | |
1244 | return ret; | |
1245 | } | |
1246 | ||
1247 | if ((size_t) n < l-1) { | |
1248 | c[n] = 0; | |
1249 | *r = c; | |
1250 | return 0; | |
1251 | } | |
1252 | ||
1253 | free(c); | |
1254 | l *= 2; | |
1255 | } | |
1256 | } | |
1257 | ||
2c7108c4 LP |
1258 | int readlink_and_make_absolute(const char *p, char **r) { |
1259 | char *target, *k; | |
1260 | int j; | |
1261 | ||
1262 | assert(p); | |
1263 | assert(r); | |
1264 | ||
1265 | if ((j = readlink_malloc(p, &target)) < 0) | |
1266 | return j; | |
1267 | ||
1268 | k = file_in_same_dir(p, target); | |
1269 | free(target); | |
1270 | ||
1271 | if (!k) | |
1272 | return -ENOMEM; | |
1273 | ||
1274 | *r = k; | |
1275 | return 0; | |
1276 | } | |
1277 | ||
83096483 LP |
1278 | int readlink_and_canonicalize(const char *p, char **r) { |
1279 | char *t, *s; | |
1280 | int j; | |
1281 | ||
1282 | assert(p); | |
1283 | assert(r); | |
1284 | ||
1285 | j = readlink_and_make_absolute(p, &t); | |
1286 | if (j < 0) | |
1287 | return j; | |
1288 | ||
1289 | s = canonicalize_file_name(t); | |
1290 | if (s) { | |
1291 | free(t); | |
1292 | *r = s; | |
1293 | } else | |
1294 | *r = t; | |
1295 | ||
1296 | path_kill_slashes(*r); | |
1297 | ||
1298 | return 0; | |
1299 | } | |
1300 | ||
2a987ee8 LP |
1301 | int reset_all_signal_handlers(void) { |
1302 | int sig; | |
1303 | ||
1304 | for (sig = 1; sig < _NSIG; sig++) { | |
1305 | struct sigaction sa; | |
1306 | ||
1307 | if (sig == SIGKILL || sig == SIGSTOP) | |
1308 | continue; | |
1309 | ||
1310 | zero(sa); | |
1311 | sa.sa_handler = SIG_DFL; | |
431c32bf | 1312 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
1313 | |
1314 | /* On Linux the first two RT signals are reserved by | |
1315 | * glibc, and sigaction() will return EINVAL for them. */ | |
1316 | if ((sigaction(sig, &sa, NULL) < 0)) | |
1317 | if (errno != EINVAL) | |
1318 | return -errno; | |
1319 | } | |
1320 | ||
8e274523 | 1321 | return 0; |
2a987ee8 | 1322 | } |
4a72ff34 LP |
1323 | |
1324 | char *strstrip(char *s) { | |
57a8eca8 | 1325 | char *e; |
4a72ff34 LP |
1326 | |
1327 | /* Drops trailing whitespace. Modifies the string in | |
1328 | * place. Returns pointer to first non-space character */ | |
1329 | ||
1330 | s += strspn(s, WHITESPACE); | |
1331 | ||
57a8eca8 LP |
1332 | for (e = strchr(s, 0); e > s; e --) |
1333 | if (!strchr(WHITESPACE, e[-1])) | |
1334 | break; | |
4a72ff34 | 1335 | |
57a8eca8 | 1336 | *e = 0; |
4a72ff34 LP |
1337 | |
1338 | return s; | |
4a72ff34 LP |
1339 | } |
1340 | ||
ee9b5e01 LP |
1341 | char *delete_chars(char *s, const char *bad) { |
1342 | char *f, *t; | |
1343 | ||
1344 | /* Drops all whitespace, regardless where in the string */ | |
1345 | ||
1346 | for (f = s, t = s; *f; f++) { | |
1347 | if (strchr(bad, *f)) | |
1348 | continue; | |
1349 | ||
1350 | *(t++) = *f; | |
1351 | } | |
1352 | ||
1353 | *t = 0; | |
1354 | ||
1355 | return s; | |
1356 | } | |
1357 | ||
ab1f0633 LP |
1358 | bool in_charset(const char *s, const char* charset) { |
1359 | const char *i; | |
1360 | ||
1361 | assert(s); | |
1362 | assert(charset); | |
1363 | ||
1364 | for (i = s; *i; i++) | |
1365 | if (!strchr(charset, *i)) | |
1366 | return false; | |
1367 | ||
1368 | return true; | |
1369 | } | |
1370 | ||
4a72ff34 LP |
1371 | char *file_in_same_dir(const char *path, const char *filename) { |
1372 | char *e, *r; | |
1373 | size_t k; | |
1374 | ||
1375 | assert(path); | |
1376 | assert(filename); | |
1377 | ||
1378 | /* This removes the last component of path and appends | |
1379 | * filename, unless the latter is absolute anyway or the | |
1380 | * former isn't */ | |
1381 | ||
1382 | if (path_is_absolute(filename)) | |
1383 | return strdup(filename); | |
1384 | ||
1385 | if (!(e = strrchr(path, '/'))) | |
1386 | return strdup(filename); | |
1387 | ||
1388 | k = strlen(filename); | |
1389 | if (!(r = new(char, e-path+1+k+1))) | |
1390 | return NULL; | |
1391 | ||
1392 | memcpy(r, path, e-path+1); | |
1393 | memcpy(r+(e-path)+1, filename, k+1); | |
1394 | ||
1395 | return r; | |
1396 | } | |
fb624d04 | 1397 | |
c32dd69b LP |
1398 | int rmdir_parents(const char *path, const char *stop) { |
1399 | size_t l; | |
1400 | int r = 0; | |
1401 | ||
1402 | assert(path); | |
1403 | assert(stop); | |
1404 | ||
1405 | l = strlen(path); | |
1406 | ||
1407 | /* Skip trailing slashes */ | |
1408 | while (l > 0 && path[l-1] == '/') | |
1409 | l--; | |
1410 | ||
1411 | while (l > 0) { | |
1412 | char *t; | |
1413 | ||
1414 | /* Skip last component */ | |
1415 | while (l > 0 && path[l-1] != '/') | |
1416 | l--; | |
1417 | ||
1418 | /* Skip trailing slashes */ | |
1419 | while (l > 0 && path[l-1] == '/') | |
1420 | l--; | |
1421 | ||
1422 | if (l <= 0) | |
1423 | break; | |
1424 | ||
1425 | if (!(t = strndup(path, l))) | |
1426 | return -ENOMEM; | |
1427 | ||
1428 | if (path_startswith(stop, t)) { | |
1429 | free(t); | |
1430 | return 0; | |
1431 | } | |
1432 | ||
1433 | r = rmdir(t); | |
1434 | free(t); | |
1435 | ||
1436 | if (r < 0) | |
1437 | if (errno != ENOENT) | |
1438 | return -errno; | |
1439 | } | |
1440 | ||
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | ||
fb624d04 LP |
1445 | char hexchar(int x) { |
1446 | static const char table[16] = "0123456789abcdef"; | |
1447 | ||
1448 | return table[x & 15]; | |
1449 | } | |
4fe88d28 LP |
1450 | |
1451 | int unhexchar(char c) { | |
1452 | ||
1453 | if (c >= '0' && c <= '9') | |
1454 | return c - '0'; | |
1455 | ||
1456 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1457 | return c - 'a' + 10; |
4fe88d28 LP |
1458 | |
1459 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1460 | return c - 'A' + 10; |
4fe88d28 LP |
1461 | |
1462 | return -1; | |
1463 | } | |
1464 | ||
1465 | char octchar(int x) { | |
1466 | return '0' + (x & 7); | |
1467 | } | |
1468 | ||
1469 | int unoctchar(char c) { | |
1470 | ||
1471 | if (c >= '0' && c <= '7') | |
1472 | return c - '0'; | |
1473 | ||
1474 | return -1; | |
1475 | } | |
1476 | ||
5af98f82 LP |
1477 | char decchar(int x) { |
1478 | return '0' + (x % 10); | |
1479 | } | |
1480 | ||
1481 | int undecchar(char c) { | |
1482 | ||
1483 | if (c >= '0' && c <= '9') | |
1484 | return c - '0'; | |
1485 | ||
1486 | return -1; | |
1487 | } | |
1488 | ||
4fe88d28 LP |
1489 | char *cescape(const char *s) { |
1490 | char *r, *t; | |
1491 | const char *f; | |
1492 | ||
1493 | assert(s); | |
1494 | ||
1495 | /* Does C style string escaping. */ | |
1496 | ||
f8e2fb7b LP |
1497 | r = new(char, strlen(s)*4 + 1); |
1498 | if (!r) | |
4fe88d28 LP |
1499 | return NULL; |
1500 | ||
1501 | for (f = s, t = r; *f; f++) | |
1502 | ||
1503 | switch (*f) { | |
1504 | ||
1505 | case '\a': | |
1506 | *(t++) = '\\'; | |
1507 | *(t++) = 'a'; | |
1508 | break; | |
1509 | case '\b': | |
1510 | *(t++) = '\\'; | |
1511 | *(t++) = 'b'; | |
1512 | break; | |
1513 | case '\f': | |
1514 | *(t++) = '\\'; | |
1515 | *(t++) = 'f'; | |
1516 | break; | |
1517 | case '\n': | |
1518 | *(t++) = '\\'; | |
1519 | *(t++) = 'n'; | |
1520 | break; | |
1521 | case '\r': | |
1522 | *(t++) = '\\'; | |
1523 | *(t++) = 'r'; | |
1524 | break; | |
1525 | case '\t': | |
1526 | *(t++) = '\\'; | |
1527 | *(t++) = 't'; | |
1528 | break; | |
1529 | case '\v': | |
1530 | *(t++) = '\\'; | |
1531 | *(t++) = 'v'; | |
1532 | break; | |
1533 | case '\\': | |
1534 | *(t++) = '\\'; | |
1535 | *(t++) = '\\'; | |
1536 | break; | |
1537 | case '"': | |
1538 | *(t++) = '\\'; | |
1539 | *(t++) = '"'; | |
1540 | break; | |
1541 | case '\'': | |
1542 | *(t++) = '\\'; | |
1543 | *(t++) = '\''; | |
1544 | break; | |
1545 | ||
1546 | default: | |
1547 | /* For special chars we prefer octal over | |
1548 | * hexadecimal encoding, simply because glib's | |
1549 | * g_strescape() does the same */ | |
1550 | if ((*f < ' ') || (*f >= 127)) { | |
1551 | *(t++) = '\\'; | |
1552 | *(t++) = octchar((unsigned char) *f >> 6); | |
1553 | *(t++) = octchar((unsigned char) *f >> 3); | |
1554 | *(t++) = octchar((unsigned char) *f); | |
1555 | } else | |
1556 | *(t++) = *f; | |
1557 | break; | |
1558 | } | |
1559 | ||
1560 | *t = 0; | |
1561 | ||
1562 | return r; | |
1563 | } | |
1564 | ||
5b4c61cd | 1565 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1566 | char *r, *t; |
1567 | const char *f; | |
5b4c61cd | 1568 | size_t pl; |
4fe88d28 LP |
1569 | |
1570 | assert(s); | |
1571 | ||
5b4c61cd LP |
1572 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1573 | ||
1574 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1575 | |
5b4c61cd | 1576 | r = new(char, pl+length+1); |
7f110ff9 | 1577 | if (!r) |
4fe88d28 LP |
1578 | return r; |
1579 | ||
5b4c61cd LP |
1580 | if (prefix) |
1581 | memcpy(r, prefix, pl); | |
1582 | ||
1583 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1584 | |
1585 | if (*f != '\\') { | |
1586 | *(t++) = *f; | |
1587 | continue; | |
1588 | } | |
1589 | ||
1590 | f++; | |
1591 | ||
1592 | switch (*f) { | |
1593 | ||
1594 | case 'a': | |
1595 | *(t++) = '\a'; | |
1596 | break; | |
1597 | case 'b': | |
1598 | *(t++) = '\b'; | |
1599 | break; | |
1600 | case 'f': | |
1601 | *(t++) = '\f'; | |
1602 | break; | |
1603 | case 'n': | |
1604 | *(t++) = '\n'; | |
1605 | break; | |
1606 | case 'r': | |
1607 | *(t++) = '\r'; | |
1608 | break; | |
1609 | case 't': | |
1610 | *(t++) = '\t'; | |
1611 | break; | |
1612 | case 'v': | |
1613 | *(t++) = '\v'; | |
1614 | break; | |
1615 | case '\\': | |
1616 | *(t++) = '\\'; | |
1617 | break; | |
1618 | case '"': | |
1619 | *(t++) = '"'; | |
1620 | break; | |
1621 | case '\'': | |
1622 | *(t++) = '\''; | |
1623 | break; | |
1624 | ||
e167fb86 LP |
1625 | case 's': |
1626 | /* This is an extension of the XDG syntax files */ | |
1627 | *(t++) = ' '; | |
1628 | break; | |
1629 | ||
4fe88d28 LP |
1630 | case 'x': { |
1631 | /* hexadecimal encoding */ | |
1632 | int a, b; | |
1633 | ||
7f110ff9 LP |
1634 | a = unhexchar(f[1]); |
1635 | b = unhexchar(f[2]); | |
1636 | ||
1637 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1638 | /* Invalid escape code, let's take it literal then */ |
1639 | *(t++) = '\\'; | |
1640 | *(t++) = 'x'; | |
1641 | } else { | |
1642 | *(t++) = (char) ((a << 4) | b); | |
1643 | f += 2; | |
1644 | } | |
1645 | ||
1646 | break; | |
1647 | } | |
1648 | ||
1649 | case '0': | |
1650 | case '1': | |
1651 | case '2': | |
1652 | case '3': | |
1653 | case '4': | |
1654 | case '5': | |
1655 | case '6': | |
1656 | case '7': { | |
1657 | /* octal encoding */ | |
1658 | int a, b, c; | |
1659 | ||
7f110ff9 LP |
1660 | a = unoctchar(f[0]); |
1661 | b = unoctchar(f[1]); | |
1662 | c = unoctchar(f[2]); | |
1663 | ||
1664 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1665 | /* Invalid escape code, let's take it literal then */ |
1666 | *(t++) = '\\'; | |
1667 | *(t++) = f[0]; | |
1668 | } else { | |
1669 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1670 | f += 2; | |
1671 | } | |
1672 | ||
1673 | break; | |
1674 | } | |
1675 | ||
1676 | case 0: | |
1677 | /* premature end of string.*/ | |
1678 | *(t++) = '\\'; | |
1679 | goto finish; | |
1680 | ||
1681 | default: | |
1682 | /* Invalid escape code, let's take it literal then */ | |
1683 | *(t++) = '\\'; | |
f3d4cc01 | 1684 | *(t++) = *f; |
4fe88d28 LP |
1685 | break; |
1686 | } | |
1687 | } | |
1688 | ||
1689 | finish: | |
1690 | *t = 0; | |
1691 | return r; | |
1692 | } | |
1693 | ||
5b4c61cd LP |
1694 | char *cunescape_length(const char *s, size_t length) { |
1695 | return cunescape_length_with_prefix(s, length, NULL); | |
1696 | } | |
1697 | ||
6febfd0d | 1698 | char *cunescape(const char *s) { |
5b4c61cd LP |
1699 | assert(s); |
1700 | ||
6febfd0d LP |
1701 | return cunescape_length(s, strlen(s)); |
1702 | } | |
4fe88d28 LP |
1703 | |
1704 | char *xescape(const char *s, const char *bad) { | |
1705 | char *r, *t; | |
1706 | const char *f; | |
1707 | ||
1708 | /* Escapes all chars in bad, in addition to \ and all special | |
1709 | * chars, in \xFF style escaping. May be reversed with | |
1710 | * cunescape. */ | |
1711 | ||
1712 | if (!(r = new(char, strlen(s)*4+1))) | |
1713 | return NULL; | |
1714 | ||
1715 | for (f = s, t = r; *f; f++) { | |
1716 | ||
b866264a LP |
1717 | if ((*f < ' ') || (*f >= 127) || |
1718 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1719 | *(t++) = '\\'; |
1720 | *(t++) = 'x'; | |
1721 | *(t++) = hexchar(*f >> 4); | |
1722 | *(t++) = hexchar(*f); | |
1723 | } else | |
1724 | *(t++) = *f; | |
1725 | } | |
1726 | ||
1727 | *t = 0; | |
1728 | ||
1729 | return r; | |
1730 | } | |
1731 | ||
ea430986 | 1732 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1733 | char *r, *t; |
1734 | const char *f; | |
1735 | ||
47be870b LP |
1736 | assert(s); |
1737 | ||
ea430986 LP |
1738 | /* Escapes all chars that D-Bus' object path cannot deal |
1739 | * with. Can be reverse with bus_path_unescape() */ | |
1740 | ||
1741 | if (!(r = new(char, strlen(s)*3+1))) | |
1742 | return NULL; | |
1743 | ||
1744 | for (f = s, t = r; *f; f++) { | |
1745 | ||
1746 | if (!(*f >= 'A' && *f <= 'Z') && | |
1747 | !(*f >= 'a' && *f <= 'z') && | |
1748 | !(*f >= '0' && *f <= '9')) { | |
1749 | *(t++) = '_'; | |
1750 | *(t++) = hexchar(*f >> 4); | |
1751 | *(t++) = hexchar(*f); | |
1752 | } else | |
1753 | *(t++) = *f; | |
1754 | } | |
1755 | ||
1756 | *t = 0; | |
1757 | ||
1758 | return r; | |
1759 | } | |
1760 | ||
9e2f7c11 | 1761 | char *bus_path_unescape(const char *f) { |
ea430986 | 1762 | char *r, *t; |
ea430986 | 1763 | |
9e2f7c11 | 1764 | assert(f); |
47be870b | 1765 | |
9e2f7c11 | 1766 | if (!(r = strdup(f))) |
ea430986 LP |
1767 | return NULL; |
1768 | ||
9e2f7c11 | 1769 | for (t = r; *f; f++) { |
ea430986 LP |
1770 | |
1771 | if (*f == '_') { | |
1772 | int a, b; | |
1773 | ||
1774 | if ((a = unhexchar(f[1])) < 0 || | |
1775 | (b = unhexchar(f[2])) < 0) { | |
1776 | /* Invalid escape code, let's take it literal then */ | |
1777 | *(t++) = '_'; | |
1778 | } else { | |
1779 | *(t++) = (char) ((a << 4) | b); | |
1780 | f += 2; | |
1781 | } | |
1782 | } else | |
1783 | *(t++) = *f; | |
1784 | } | |
1785 | ||
1786 | *t = 0; | |
1787 | ||
1788 | return r; | |
1789 | } | |
1790 | ||
67d51650 | 1791 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1792 | char *p; |
1793 | ||
67d51650 | 1794 | assert(t); |
4fe88d28 | 1795 | |
67d51650 | 1796 | for (p = t; *p; p++) |
4fe88d28 LP |
1797 | if (*p >= 'A' && *p <= 'Z') |
1798 | *p = *p - 'A' + 'a'; | |
1799 | ||
67d51650 | 1800 | return t; |
4fe88d28 | 1801 | } |
1dccbe19 | 1802 | |
c85dc17b LP |
1803 | bool ignore_file(const char *filename) { |
1804 | assert(filename); | |
1805 | ||
1806 | return | |
1807 | filename[0] == '.' || | |
6c78be3c | 1808 | streq(filename, "lost+found") || |
e472d476 LP |
1809 | streq(filename, "aquota.user") || |
1810 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1811 | endswith(filename, "~") || |
1812 | endswith(filename, ".rpmnew") || | |
1813 | endswith(filename, ".rpmsave") || | |
1814 | endswith(filename, ".rpmorig") || | |
1815 | endswith(filename, ".dpkg-old") || | |
1816 | endswith(filename, ".dpkg-new") || | |
1817 | endswith(filename, ".swp"); | |
1818 | } | |
1819 | ||
3a0ecb08 LP |
1820 | int fd_nonblock(int fd, bool nonblock) { |
1821 | int flags; | |
1822 | ||
1823 | assert(fd >= 0); | |
1824 | ||
1825 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1826 | return -errno; | |
1827 | ||
1828 | if (nonblock) | |
1829 | flags |= O_NONBLOCK; | |
1830 | else | |
1831 | flags &= ~O_NONBLOCK; | |
1832 | ||
1833 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1834 | return -errno; | |
1835 | ||
1836 | return 0; | |
1837 | } | |
1838 | ||
1839 | int fd_cloexec(int fd, bool cloexec) { | |
1840 | int flags; | |
1841 | ||
1842 | assert(fd >= 0); | |
1843 | ||
1844 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1845 | return -errno; | |
1846 | ||
1847 | if (cloexec) | |
1848 | flags |= FD_CLOEXEC; | |
1849 | else | |
1850 | flags &= ~FD_CLOEXEC; | |
1851 | ||
1852 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1853 | return -errno; | |
1854 | ||
1855 | return 0; | |
1856 | } | |
1857 | ||
b19be9eb LP |
1858 | static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
1859 | unsigned i; | |
1860 | ||
1861 | assert(n_fdset == 0 || fdset); | |
1862 | ||
1863 | for (i = 0; i < n_fdset; i++) | |
1864 | if (fdset[i] == fd) | |
1865 | return true; | |
1866 | ||
1867 | return false; | |
1868 | } | |
1869 | ||
a0d40ac5 LP |
1870 | int close_all_fds(const int except[], unsigned n_except) { |
1871 | DIR *d; | |
1872 | struct dirent *de; | |
1873 | int r = 0; | |
1874 | ||
b19be9eb LP |
1875 | assert(n_except == 0 || except); |
1876 | ||
1877 | d = opendir("/proc/self/fd"); | |
1878 | if (!d) { | |
1879 | int fd; | |
1880 | struct rlimit rl; | |
1881 | ||
1882 | /* When /proc isn't available (for example in chroots) | |
1883 | * the fallback is brute forcing through the fd | |
1884 | * table */ | |
1885 | ||
1886 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1887 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1888 | ||
1889 | if (fd_in_set(fd, except, n_except)) | |
1890 | continue; | |
1891 | ||
1892 | if (close_nointr(fd) < 0) | |
1893 | if (errno != EBADF && r == 0) | |
1894 | r = -errno; | |
1895 | } | |
1896 | ||
1897 | return r; | |
1898 | } | |
a0d40ac5 LP |
1899 | |
1900 | while ((de = readdir(d))) { | |
a7610064 | 1901 | int fd = -1; |
a0d40ac5 | 1902 | |
a16e1123 | 1903 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1904 | continue; |
1905 | ||
720ce21d LP |
1906 | if (safe_atoi(de->d_name, &fd) < 0) |
1907 | /* Let's better ignore this, just in case */ | |
1908 | continue; | |
a0d40ac5 LP |
1909 | |
1910 | if (fd < 3) | |
1911 | continue; | |
1912 | ||
1913 | if (fd == dirfd(d)) | |
1914 | continue; | |
1915 | ||
b19be9eb LP |
1916 | if (fd_in_set(fd, except, n_except)) |
1917 | continue; | |
a0d40ac5 | 1918 | |
720ce21d | 1919 | if (close_nointr(fd) < 0) { |
2f357920 | 1920 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1921 | if (errno != EBADF && r == 0) |
1922 | r = -errno; | |
2f357920 | 1923 | } |
a0d40ac5 LP |
1924 | } |
1925 | ||
a0d40ac5 LP |
1926 | closedir(d); |
1927 | return r; | |
1928 | } | |
1929 | ||
db12775d LP |
1930 | bool chars_intersect(const char *a, const char *b) { |
1931 | const char *p; | |
1932 | ||
1933 | /* Returns true if any of the chars in a are in b. */ | |
1934 | for (p = a; *p; p++) | |
1935 | if (strchr(b, *p)) | |
1936 | return true; | |
1937 | ||
1938 | return false; | |
1939 | } | |
1940 | ||
8b6c7120 LP |
1941 | char *format_timestamp(char *buf, size_t l, usec_t t) { |
1942 | struct tm tm; | |
1943 | time_t sec; | |
1944 | ||
1945 | assert(buf); | |
1946 | assert(l > 0); | |
1947 | ||
1948 | if (t <= 0) | |
1949 | return NULL; | |
1950 | ||
f872ec33 | 1951 | sec = (time_t) (t / USEC_PER_SEC); |
8b6c7120 LP |
1952 | |
1953 | if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0) | |
1954 | return NULL; | |
1955 | ||
1956 | return buf; | |
1957 | } | |
1958 | ||
584be568 LP |
1959 | char *format_timestamp_pretty(char *buf, size_t l, usec_t t) { |
1960 | usec_t n, d; | |
1961 | ||
1962 | n = now(CLOCK_REALTIME); | |
1963 | ||
1964 | if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) | |
1965 | return NULL; | |
1966 | ||
1967 | d = n - t; | |
1968 | ||
1969 | if (d >= USEC_PER_YEAR) | |
1970 | snprintf(buf, l, "%llu years and %llu months ago", | |
1971 | (unsigned long long) (d / USEC_PER_YEAR), | |
1972 | (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); | |
1973 | else if (d >= USEC_PER_MONTH) | |
1974 | snprintf(buf, l, "%llu months and %llu days ago", | |
1975 | (unsigned long long) (d / USEC_PER_MONTH), | |
1976 | (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); | |
1977 | else if (d >= USEC_PER_WEEK) | |
1978 | snprintf(buf, l, "%llu weeks and %llu days ago", | |
1979 | (unsigned long long) (d / USEC_PER_WEEK), | |
1980 | (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); | |
1981 | else if (d >= 2*USEC_PER_DAY) | |
1982 | snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); | |
1983 | else if (d >= 25*USEC_PER_HOUR) | |
1984 | snprintf(buf, l, "1 day and %lluh ago", | |
1985 | (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); | |
1986 | else if (d >= 6*USEC_PER_HOUR) | |
1987 | snprintf(buf, l, "%lluh ago", | |
1988 | (unsigned long long) (d / USEC_PER_HOUR)); | |
1989 | else if (d >= USEC_PER_HOUR) | |
1990 | snprintf(buf, l, "%lluh %llumin ago", | |
1991 | (unsigned long long) (d / USEC_PER_HOUR), | |
1992 | (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); | |
1993 | else if (d >= 5*USEC_PER_MINUTE) | |
1994 | snprintf(buf, l, "%llumin ago", | |
1995 | (unsigned long long) (d / USEC_PER_MINUTE)); | |
1996 | else if (d >= USEC_PER_MINUTE) | |
1997 | snprintf(buf, l, "%llumin %llus ago", | |
1998 | (unsigned long long) (d / USEC_PER_MINUTE), | |
1999 | (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); | |
2000 | else if (d >= USEC_PER_SEC) | |
2001 | snprintf(buf, l, "%llus ago", | |
2002 | (unsigned long long) (d / USEC_PER_SEC)); | |
2003 | else if (d >= USEC_PER_MSEC) | |
2004 | snprintf(buf, l, "%llums ago", | |
2005 | (unsigned long long) (d / USEC_PER_MSEC)); | |
2006 | else if (d > 0) | |
2007 | snprintf(buf, l, "%lluus ago", | |
2008 | (unsigned long long) d); | |
2009 | else | |
2010 | snprintf(buf, l, "now"); | |
2011 | ||
2012 | buf[l-1] = 0; | |
2013 | return buf; | |
2014 | } | |
2015 | ||
871d7de4 LP |
2016 | char *format_timespan(char *buf, size_t l, usec_t t) { |
2017 | static const struct { | |
2018 | const char *suffix; | |
2019 | usec_t usec; | |
2020 | } table[] = { | |
2021 | { "w", USEC_PER_WEEK }, | |
2022 | { "d", USEC_PER_DAY }, | |
2023 | { "h", USEC_PER_HOUR }, | |
2024 | { "min", USEC_PER_MINUTE }, | |
2025 | { "s", USEC_PER_SEC }, | |
2026 | { "ms", USEC_PER_MSEC }, | |
2027 | { "us", 1 }, | |
2028 | }; | |
2029 | ||
2030 | unsigned i; | |
2031 | char *p = buf; | |
2032 | ||
2033 | assert(buf); | |
2034 | assert(l > 0); | |
2035 | ||
2036 | if (t == (usec_t) -1) | |
2037 | return NULL; | |
2038 | ||
4502d22c LP |
2039 | if (t == 0) { |
2040 | snprintf(p, l, "0"); | |
2041 | p[l-1] = 0; | |
2042 | return p; | |
2043 | } | |
2044 | ||
871d7de4 LP |
2045 | /* The result of this function can be parsed with parse_usec */ |
2046 | ||
2047 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
2048 | int k; | |
2049 | size_t n; | |
2050 | ||
2051 | if (t < table[i].usec) | |
2052 | continue; | |
2053 | ||
2054 | if (l <= 1) | |
2055 | break; | |
2056 | ||
2057 | k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix); | |
2058 | n = MIN((size_t) k, l); | |
2059 | ||
2060 | l -= n; | |
2061 | p += n; | |
2062 | ||
2063 | t %= table[i].usec; | |
2064 | } | |
2065 | ||
2066 | *p = 0; | |
2067 | ||
2068 | return buf; | |
2069 | } | |
2070 | ||
42856c10 LP |
2071 | bool fstype_is_network(const char *fstype) { |
2072 | static const char * const table[] = { | |
2073 | "cifs", | |
2074 | "smbfs", | |
2075 | "ncpfs", | |
2076 | "nfs", | |
ca139f94 LP |
2077 | "nfs4", |
2078 | "gfs", | |
2079 | "gfs2" | |
42856c10 LP |
2080 | }; |
2081 | ||
2082 | unsigned i; | |
2083 | ||
2084 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2085 | if (streq(table[i], fstype)) | |
2086 | return true; | |
2087 | ||
2088 | return false; | |
2089 | } | |
2090 | ||
601f6a1e LP |
2091 | int chvt(int vt) { |
2092 | int fd, r = 0; | |
2093 | ||
74bc3bdc | 2094 | if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) |
601f6a1e LP |
2095 | return -errno; |
2096 | ||
2097 | if (vt < 0) { | |
2098 | int tiocl[2] = { | |
2099 | TIOCL_GETKMSGREDIRECT, | |
2100 | 0 | |
2101 | }; | |
2102 | ||
678abaf9 TJ |
2103 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) { |
2104 | r = -errno; | |
2105 | goto fail; | |
2106 | } | |
601f6a1e LP |
2107 | |
2108 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
2109 | } | |
2110 | ||
2111 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
2112 | r = -errno; | |
2113 | ||
678abaf9 TJ |
2114 | fail: |
2115 | close_nointr_nofail(fd); | |
601f6a1e LP |
2116 | return r; |
2117 | } | |
2118 | ||
8f2d43a0 | 2119 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
2120 | struct termios old_termios, new_termios; |
2121 | char c; | |
20c03b7b | 2122 | char line[LINE_MAX]; |
80876c20 LP |
2123 | |
2124 | assert(f); | |
2125 | assert(ret); | |
2126 | ||
2127 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
2128 | new_termios = old_termios; | |
2129 | ||
2130 | new_termios.c_lflag &= ~ICANON; | |
2131 | new_termios.c_cc[VMIN] = 1; | |
2132 | new_termios.c_cc[VTIME] = 0; | |
2133 | ||
2134 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
2135 | size_t k; | |
2136 | ||
8f2d43a0 LP |
2137 | if (t != (usec_t) -1) { |
2138 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
2139 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2140 | return -ETIMEDOUT; | |
2141 | } | |
2142 | } | |
2143 | ||
80876c20 LP |
2144 | k = fread(&c, 1, 1, f); |
2145 | ||
2146 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2147 | ||
2148 | if (k <= 0) | |
2149 | return -EIO; | |
2150 | ||
2151 | if (need_nl) | |
2152 | *need_nl = c != '\n'; | |
2153 | ||
2154 | *ret = c; | |
2155 | return 0; | |
2156 | } | |
2157 | } | |
2158 | ||
8f2d43a0 LP |
2159 | if (t != (usec_t) -1) |
2160 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
2161 | return -ETIMEDOUT; | |
2162 | ||
2163 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
2164 | return -EIO; |
2165 | ||
2166 | truncate_nl(line); | |
2167 | ||
2168 | if (strlen(line) != 1) | |
2169 | return -EBADMSG; | |
2170 | ||
2171 | if (need_nl) | |
2172 | *need_nl = false; | |
2173 | ||
2174 | *ret = line[0]; | |
2175 | return 0; | |
2176 | } | |
2177 | ||
2178 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 LP |
2179 | bool on_tty; |
2180 | ||
80876c20 LP |
2181 | assert(ret); |
2182 | assert(replies); | |
2183 | assert(text); | |
2184 | ||
1b39d4b9 LP |
2185 | on_tty = isatty(STDOUT_FILENO); |
2186 | ||
80876c20 LP |
2187 | for (;;) { |
2188 | va_list ap; | |
2189 | char c; | |
2190 | int r; | |
2191 | bool need_nl = true; | |
2192 | ||
1b39d4b9 | 2193 | if (on_tty) |
c1072ea0 | 2194 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 2195 | |
80876c20 LP |
2196 | va_start(ap, text); |
2197 | vprintf(text, ap); | |
2198 | va_end(ap); | |
2199 | ||
1b39d4b9 | 2200 | if (on_tty) |
c1072ea0 | 2201 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 2202 | |
80876c20 LP |
2203 | fflush(stdout); |
2204 | ||
8f2d43a0 LP |
2205 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
2206 | if (r < 0) { | |
80876c20 LP |
2207 | |
2208 | if (r == -EBADMSG) { | |
2209 | puts("Bad input, please try again."); | |
2210 | continue; | |
2211 | } | |
2212 | ||
2213 | putchar('\n'); | |
2214 | return r; | |
2215 | } | |
2216 | ||
2217 | if (need_nl) | |
2218 | putchar('\n'); | |
2219 | ||
2220 | if (strchr(replies, c)) { | |
2221 | *ret = c; | |
2222 | return 0; | |
2223 | } | |
2224 | ||
2225 | puts("Read unexpected character, please try again."); | |
2226 | } | |
2227 | } | |
2228 | ||
512947d4 | 2229 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
2230 | struct termios termios; |
2231 | int r = 0; | |
3fe5e5d4 LP |
2232 | |
2233 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
2234 | |
2235 | assert(fd >= 0); | |
2236 | ||
eed1d0e3 LP |
2237 | /* We leave locked terminal attributes untouched, so that |
2238 | * Plymouth may set whatever it wants to set, and we don't | |
2239 | * interfere with that. */ | |
3fe5e5d4 LP |
2240 | |
2241 | /* Disable exclusive mode, just in case */ | |
2242 | ioctl(fd, TIOCNXCL); | |
2243 | ||
5c0100a5 | 2244 | /* Switch to text mode */ |
512947d4 MS |
2245 | if (switch_to_text) |
2246 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 2247 | |
3fe5e5d4 | 2248 | /* Enable console unicode mode */ |
df465b3f | 2249 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
2250 | |
2251 | if (tcgetattr(fd, &termios) < 0) { | |
2252 | r = -errno; | |
2253 | goto finish; | |
2254 | } | |
2255 | ||
aaf694ca LP |
2256 | /* We only reset the stuff that matters to the software. How |
2257 | * hardware is set up we don't touch assuming that somebody | |
2258 | * else will do that for us */ | |
2259 | ||
2260 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
2261 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
2262 | termios.c_oflag |= ONLCR; | |
2263 | termios.c_cflag |= CREAD; | |
2264 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
2265 | ||
2266 | termios.c_cc[VINTR] = 03; /* ^C */ | |
2267 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
2268 | termios.c_cc[VERASE] = 0177; | |
2269 | termios.c_cc[VKILL] = 025; /* ^X */ | |
2270 | termios.c_cc[VEOF] = 04; /* ^D */ | |
2271 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
2272 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
2273 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
2274 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
2275 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
2276 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
2277 | termios.c_cc[VEOL] = 0; |
2278 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
2279 | |
2280 | termios.c_cc[VTIME] = 0; | |
2281 | termios.c_cc[VMIN] = 1; | |
2282 | ||
2283 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
2284 | r = -errno; | |
2285 | ||
2286 | finish: | |
2287 | /* Just in case, flush all crap out */ | |
2288 | tcflush(fd, TCIOFLUSH); | |
2289 | ||
2290 | return r; | |
2291 | } | |
2292 | ||
6ea832a2 LP |
2293 | int reset_terminal(const char *name) { |
2294 | int fd, r; | |
2295 | ||
2296 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
2297 | if (fd < 0) | |
2298 | return fd; | |
2299 | ||
512947d4 | 2300 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
2301 | close_nointr_nofail(fd); |
2302 | ||
2303 | return r; | |
2304 | } | |
2305 | ||
80876c20 LP |
2306 | int open_terminal(const char *name, int mode) { |
2307 | int fd, r; | |
f73f76ac | 2308 | unsigned c = 0; |
80876c20 | 2309 | |
f73f76ac LP |
2310 | /* |
2311 | * If a TTY is in the process of being closed opening it might | |
2312 | * cause EIO. This is horribly awful, but unlikely to be | |
2313 | * changed in the kernel. Hence we work around this problem by | |
2314 | * retrying a couple of times. | |
2315 | * | |
2316 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
2317 | */ | |
2318 | ||
2319 | for (;;) { | |
af6da548 LP |
2320 | fd = open(name, mode); |
2321 | if (fd >= 0) | |
f73f76ac LP |
2322 | break; |
2323 | ||
2324 | if (errno != EIO) | |
2325 | return -errno; | |
2326 | ||
af6da548 | 2327 | /* Max 1s in total */ |
f73f76ac LP |
2328 | if (c >= 20) |
2329 | return -errno; | |
2330 | ||
2331 | usleep(50 * USEC_PER_MSEC); | |
2332 | c++; | |
2333 | } | |
2334 | ||
2335 | if (fd < 0) | |
80876c20 LP |
2336 | return -errno; |
2337 | ||
af6da548 LP |
2338 | r = isatty(fd); |
2339 | if (r < 0) { | |
80876c20 LP |
2340 | close_nointr_nofail(fd); |
2341 | return -errno; | |
2342 | } | |
2343 | ||
2344 | if (!r) { | |
2345 | close_nointr_nofail(fd); | |
2346 | return -ENOTTY; | |
2347 | } | |
2348 | ||
2349 | return fd; | |
2350 | } | |
2351 | ||
2352 | int flush_fd(int fd) { | |
2353 | struct pollfd pollfd; | |
2354 | ||
2355 | zero(pollfd); | |
2356 | pollfd.fd = fd; | |
2357 | pollfd.events = POLLIN; | |
2358 | ||
2359 | for (;;) { | |
20c03b7b | 2360 | char buf[LINE_MAX]; |
80876c20 LP |
2361 | ssize_t l; |
2362 | int r; | |
2363 | ||
2364 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2365 | ||
2366 | if (errno == EINTR) | |
2367 | continue; | |
2368 | ||
2369 | return -errno; | |
2370 | } | |
2371 | ||
2372 | if (r == 0) | |
2373 | return 0; | |
2374 | ||
2375 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2376 | ||
2377 | if (errno == EINTR) | |
2378 | continue; | |
2379 | ||
2380 | if (errno == EAGAIN) | |
2381 | return 0; | |
2382 | ||
2383 | return -errno; | |
2384 | } | |
2385 | ||
2386 | if (l <= 0) | |
2387 | return 0; | |
2388 | } | |
2389 | } | |
2390 | ||
af6da548 LP |
2391 | int acquire_terminal( |
2392 | const char *name, | |
2393 | bool fail, | |
2394 | bool force, | |
2395 | bool ignore_tiocstty_eperm, | |
2396 | usec_t timeout) { | |
2397 | ||
4a0ff478 | 2398 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 2399 | usec_t ts = 0; |
32c4bef8 | 2400 | struct sigaction sa_old, sa_new; |
80876c20 LP |
2401 | |
2402 | assert(name); | |
2403 | ||
2404 | /* We use inotify to be notified when the tty is closed. We | |
2405 | * create the watch before checking if we can actually acquire | |
2406 | * it, so that we don't lose any event. | |
2407 | * | |
2408 | * Note: strictly speaking this actually watches for the | |
2409 | * device being closed, it does *not* really watch whether a | |
2410 | * tty loses its controlling process. However, unless some | |
2411 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2412 | * its tty otherwise this will not become a problem. As long | |
2413 | * as the administrator makes sure not configure any service | |
2414 | * on the same tty as an untrusted user this should not be a | |
2415 | * problem. (Which he probably should not do anyway.) */ | |
2416 | ||
af6da548 LP |
2417 | if (timeout != (usec_t) -1) |
2418 | ts = now(CLOCK_MONOTONIC); | |
2419 | ||
80876c20 | 2420 | if (!fail && !force) { |
af6da548 LP |
2421 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
2422 | if (notify < 0) { | |
80876c20 LP |
2423 | r = -errno; |
2424 | goto fail; | |
2425 | } | |
2426 | ||
af6da548 LP |
2427 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
2428 | if (wd < 0) { | |
80876c20 LP |
2429 | r = -errno; |
2430 | goto fail; | |
2431 | } | |
2432 | } | |
2433 | ||
2434 | for (;;) { | |
af6da548 LP |
2435 | if (notify >= 0) { |
2436 | r = flush_fd(notify); | |
2437 | if (r < 0) | |
e3d1855b | 2438 | goto fail; |
af6da548 | 2439 | } |
80876c20 LP |
2440 | |
2441 | /* We pass here O_NOCTTY only so that we can check the return | |
2442 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2443 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
2444 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
2445 | if (fd < 0) | |
6ea832a2 | 2446 | return fd; |
80876c20 | 2447 | |
32c4bef8 LP |
2448 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2449 | * if we already own the tty. */ | |
2450 | zero(sa_new); | |
2451 | sa_new.sa_handler = SIG_IGN; | |
2452 | sa_new.sa_flags = SA_RESTART; | |
2453 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2454 | ||
80876c20 | 2455 | /* First, try to get the tty */ |
32c4bef8 LP |
2456 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
2457 | r = -errno; | |
2458 | ||
2459 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
2460 | |
2461 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2462 | * returning EPERM, i.e. when very likely we already | |
2463 | * are have this controlling terminal. */ | |
32c4bef8 | 2464 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
2465 | r = 0; |
2466 | ||
32c4bef8 | 2467 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
2468 | goto fail; |
2469 | } | |
2470 | ||
2471 | if (r >= 0) | |
2472 | break; | |
2473 | ||
2474 | assert(!fail); | |
2475 | assert(!force); | |
2476 | assert(notify >= 0); | |
2477 | ||
2478 | for (;;) { | |
f601daa7 | 2479 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 2480 | ssize_t l; |
f601daa7 | 2481 | struct inotify_event *e; |
80876c20 | 2482 | |
af6da548 LP |
2483 | if (timeout != (usec_t) -1) { |
2484 | usec_t n; | |
2485 | ||
2486 | n = now(CLOCK_MONOTONIC); | |
2487 | if (ts + timeout < n) { | |
2488 | r = -ETIMEDOUT; | |
2489 | goto fail; | |
2490 | } | |
2491 | ||
2492 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
2493 | if (r < 0) | |
2494 | goto fail; | |
2495 | ||
2496 | if (r == 0) { | |
2497 | r = -ETIMEDOUT; | |
2498 | goto fail; | |
2499 | } | |
2500 | } | |
2501 | ||
2502 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
2503 | if (l < 0) { | |
80876c20 | 2504 | |
af6da548 | 2505 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
2506 | continue; |
2507 | ||
2508 | r = -errno; | |
2509 | goto fail; | |
2510 | } | |
2511 | ||
2512 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2513 | |
f601daa7 LP |
2514 | while (l > 0) { |
2515 | size_t step; | |
80876c20 | 2516 | |
f601daa7 | 2517 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2518 | r = -EIO; |
f601daa7 LP |
2519 | goto fail; |
2520 | } | |
80876c20 | 2521 | |
f601daa7 LP |
2522 | step = sizeof(struct inotify_event) + e->len; |
2523 | assert(step <= (size_t) l); | |
80876c20 | 2524 | |
f601daa7 LP |
2525 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2526 | l -= step; | |
80876c20 LP |
2527 | } |
2528 | ||
2529 | break; | |
2530 | } | |
2531 | ||
2532 | /* We close the tty fd here since if the old session | |
2533 | * ended our handle will be dead. It's important that | |
2534 | * we do this after sleeping, so that we don't enter | |
2535 | * an endless loop. */ | |
2536 | close_nointr_nofail(fd); | |
2537 | } | |
2538 | ||
2539 | if (notify >= 0) | |
a16e1123 | 2540 | close_nointr_nofail(notify); |
80876c20 | 2541 | |
512947d4 MS |
2542 | r = reset_terminal_fd(fd, true); |
2543 | if (r < 0) | |
80876c20 LP |
2544 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2545 | ||
2546 | return fd; | |
2547 | ||
2548 | fail: | |
2549 | if (fd >= 0) | |
a16e1123 | 2550 | close_nointr_nofail(fd); |
80876c20 LP |
2551 | |
2552 | if (notify >= 0) | |
a16e1123 | 2553 | close_nointr_nofail(notify); |
80876c20 LP |
2554 | |
2555 | return r; | |
2556 | } | |
2557 | ||
2558 | int release_terminal(void) { | |
2559 | int r = 0, fd; | |
57cd2192 | 2560 | struct sigaction sa_old, sa_new; |
80876c20 | 2561 | |
ccaa6149 | 2562 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0) |
80876c20 LP |
2563 | return -errno; |
2564 | ||
57cd2192 LP |
2565 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2566 | * by our own TIOCNOTTY */ | |
2567 | ||
2568 | zero(sa_new); | |
2569 | sa_new.sa_handler = SIG_IGN; | |
2570 | sa_new.sa_flags = SA_RESTART; | |
2571 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2572 | ||
80876c20 LP |
2573 | if (ioctl(fd, TIOCNOTTY) < 0) |
2574 | r = -errno; | |
2575 | ||
57cd2192 LP |
2576 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2577 | ||
80876c20 LP |
2578 | close_nointr_nofail(fd); |
2579 | return r; | |
2580 | } | |
2581 | ||
9a34ec5f LP |
2582 | int sigaction_many(const struct sigaction *sa, ...) { |
2583 | va_list ap; | |
2584 | int r = 0, sig; | |
2585 | ||
2586 | va_start(ap, sa); | |
2587 | while ((sig = va_arg(ap, int)) > 0) | |
2588 | if (sigaction(sig, sa, NULL) < 0) | |
2589 | r = -errno; | |
2590 | va_end(ap); | |
2591 | ||
2592 | return r; | |
2593 | } | |
2594 | ||
2595 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2596 | struct sigaction sa; |
9a34ec5f LP |
2597 | va_list ap; |
2598 | int r = 0; | |
a337c6fc LP |
2599 | |
2600 | zero(sa); | |
2601 | sa.sa_handler = SIG_IGN; | |
2602 | sa.sa_flags = SA_RESTART; | |
2603 | ||
9a34ec5f LP |
2604 | if (sigaction(sig, &sa, NULL) < 0) |
2605 | r = -errno; | |
2606 | ||
2607 | va_start(ap, sig); | |
2608 | while ((sig = va_arg(ap, int)) > 0) | |
2609 | if (sigaction(sig, &sa, NULL) < 0) | |
2610 | r = -errno; | |
2611 | va_end(ap); | |
2612 | ||
2613 | return r; | |
2614 | } | |
2615 | ||
2616 | int default_signals(int sig, ...) { | |
2617 | struct sigaction sa; | |
2618 | va_list ap; | |
2619 | int r = 0; | |
2620 | ||
2621 | zero(sa); | |
2622 | sa.sa_handler = SIG_DFL; | |
2623 | sa.sa_flags = SA_RESTART; | |
2624 | ||
2625 | if (sigaction(sig, &sa, NULL) < 0) | |
2626 | r = -errno; | |
2627 | ||
2628 | va_start(ap, sig); | |
2629 | while ((sig = va_arg(ap, int)) > 0) | |
2630 | if (sigaction(sig, &sa, NULL) < 0) | |
2631 | r = -errno; | |
2632 | va_end(ap); | |
2633 | ||
2634 | return r; | |
a337c6fc LP |
2635 | } |
2636 | ||
8d567588 LP |
2637 | int close_pipe(int p[]) { |
2638 | int a = 0, b = 0; | |
2639 | ||
2640 | assert(p); | |
2641 | ||
2642 | if (p[0] >= 0) { | |
2643 | a = close_nointr(p[0]); | |
2644 | p[0] = -1; | |
2645 | } | |
2646 | ||
2647 | if (p[1] >= 0) { | |
2648 | b = close_nointr(p[1]); | |
2649 | p[1] = -1; | |
2650 | } | |
2651 | ||
2652 | return a < 0 ? a : b; | |
2653 | } | |
2654 | ||
eb22ac37 | 2655 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2656 | uint8_t *p; |
2657 | ssize_t n = 0; | |
2658 | ||
2659 | assert(fd >= 0); | |
2660 | assert(buf); | |
2661 | ||
2662 | p = buf; | |
2663 | ||
2664 | while (nbytes > 0) { | |
2665 | ssize_t k; | |
2666 | ||
2667 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2668 | ||
eb22ac37 | 2669 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2670 | continue; |
2671 | ||
eb22ac37 | 2672 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2673 | struct pollfd pollfd; |
2674 | ||
2675 | zero(pollfd); | |
2676 | pollfd.fd = fd; | |
2677 | pollfd.events = POLLIN; | |
2678 | ||
2679 | if (poll(&pollfd, 1, -1) < 0) { | |
2680 | if (errno == EINTR) | |
2681 | continue; | |
2682 | ||
2683 | return n > 0 ? n : -errno; | |
2684 | } | |
2685 | ||
2686 | if (pollfd.revents != POLLIN) | |
2687 | return n > 0 ? n : -EIO; | |
2688 | ||
2689 | continue; | |
2690 | } | |
2691 | ||
2692 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2693 | } | |
2694 | ||
2695 | p += k; | |
2696 | nbytes -= k; | |
2697 | n += k; | |
2698 | } | |
2699 | ||
2700 | return n; | |
2701 | } | |
2702 | ||
eb22ac37 LP |
2703 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2704 | const uint8_t *p; | |
2705 | ssize_t n = 0; | |
2706 | ||
2707 | assert(fd >= 0); | |
2708 | assert(buf); | |
2709 | ||
2710 | p = buf; | |
2711 | ||
2712 | while (nbytes > 0) { | |
2713 | ssize_t k; | |
2714 | ||
fe652127 LP |
2715 | k = write(fd, p, nbytes); |
2716 | if (k <= 0) { | |
eb22ac37 LP |
2717 | |
2718 | if (k < 0 && errno == EINTR) | |
2719 | continue; | |
2720 | ||
2721 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2722 | struct pollfd pollfd; | |
2723 | ||
2724 | zero(pollfd); | |
2725 | pollfd.fd = fd; | |
2726 | pollfd.events = POLLOUT; | |
2727 | ||
2728 | if (poll(&pollfd, 1, -1) < 0) { | |
2729 | if (errno == EINTR) | |
2730 | continue; | |
2731 | ||
2732 | return n > 0 ? n : -errno; | |
2733 | } | |
2734 | ||
2735 | if (pollfd.revents != POLLOUT) | |
2736 | return n > 0 ? n : -EIO; | |
2737 | ||
2738 | continue; | |
2739 | } | |
2740 | ||
2741 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2742 | } | |
2743 | ||
2744 | p += k; | |
2745 | nbytes -= k; | |
2746 | n += k; | |
2747 | } | |
2748 | ||
2749 | return n; | |
2750 | } | |
2751 | ||
24a6e4a4 LP |
2752 | int parse_usec(const char *t, usec_t *usec) { |
2753 | static const struct { | |
2754 | const char *suffix; | |
2755 | usec_t usec; | |
2756 | } table[] = { | |
2757 | { "sec", USEC_PER_SEC }, | |
2758 | { "s", USEC_PER_SEC }, | |
2759 | { "min", USEC_PER_MINUTE }, | |
2760 | { "hr", USEC_PER_HOUR }, | |
2761 | { "h", USEC_PER_HOUR }, | |
2762 | { "d", USEC_PER_DAY }, | |
2763 | { "w", USEC_PER_WEEK }, | |
2764 | { "msec", USEC_PER_MSEC }, | |
2765 | { "ms", USEC_PER_MSEC }, | |
2766 | { "m", USEC_PER_MINUTE }, | |
2767 | { "usec", 1ULL }, | |
2768 | { "us", 1ULL }, | |
d88a251b | 2769 | { "", USEC_PER_SEC }, /* default is sec */ |
24a6e4a4 LP |
2770 | }; |
2771 | ||
2772 | const char *p; | |
2773 | usec_t r = 0; | |
2774 | ||
2775 | assert(t); | |
2776 | assert(usec); | |
2777 | ||
2778 | p = t; | |
2779 | do { | |
2780 | long long l; | |
2781 | char *e; | |
2782 | unsigned i; | |
2783 | ||
2784 | errno = 0; | |
2785 | l = strtoll(p, &e, 10); | |
2786 | ||
2787 | if (errno != 0) | |
2788 | return -errno; | |
2789 | ||
2790 | if (l < 0) | |
2791 | return -ERANGE; | |
2792 | ||
2793 | if (e == p) | |
2794 | return -EINVAL; | |
2795 | ||
2796 | e += strspn(e, WHITESPACE); | |
2797 | ||
2798 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2799 | if (startswith(e, table[i].suffix)) { | |
2800 | r += (usec_t) l * table[i].usec; | |
2801 | p = e + strlen(table[i].suffix); | |
2802 | break; | |
2803 | } | |
2804 | ||
2805 | if (i >= ELEMENTSOF(table)) | |
2806 | return -EINVAL; | |
2807 | ||
2808 | } while (*p != 0); | |
2809 | ||
2810 | *usec = r; | |
2811 | ||
2812 | return 0; | |
2813 | } | |
2814 | ||
d88a251b LP |
2815 | int parse_nsec(const char *t, nsec_t *nsec) { |
2816 | static const struct { | |
2817 | const char *suffix; | |
2818 | nsec_t nsec; | |
2819 | } table[] = { | |
2820 | { "sec", NSEC_PER_SEC }, | |
2821 | { "s", NSEC_PER_SEC }, | |
2822 | { "min", NSEC_PER_MINUTE }, | |
2823 | { "hr", NSEC_PER_HOUR }, | |
2824 | { "h", NSEC_PER_HOUR }, | |
2825 | { "d", NSEC_PER_DAY }, | |
2826 | { "w", NSEC_PER_WEEK }, | |
2827 | { "msec", NSEC_PER_MSEC }, | |
2828 | { "ms", NSEC_PER_MSEC }, | |
2829 | { "m", NSEC_PER_MINUTE }, | |
2830 | { "usec", NSEC_PER_USEC }, | |
2831 | { "us", NSEC_PER_USEC }, | |
2832 | { "nsec", 1ULL }, | |
2833 | { "ns", 1ULL }, | |
2834 | { "", 1ULL }, /* default is nsec */ | |
2835 | }; | |
2836 | ||
2837 | const char *p; | |
2838 | nsec_t r = 0; | |
2839 | ||
2840 | assert(t); | |
2841 | assert(nsec); | |
2842 | ||
2843 | p = t; | |
2844 | do { | |
2845 | long long l; | |
2846 | char *e; | |
2847 | unsigned i; | |
2848 | ||
2849 | errno = 0; | |
2850 | l = strtoll(p, &e, 10); | |
2851 | ||
2852 | if (errno != 0) | |
2853 | return -errno; | |
2854 | ||
2855 | if (l < 0) | |
2856 | return -ERANGE; | |
2857 | ||
2858 | if (e == p) | |
2859 | return -EINVAL; | |
2860 | ||
2861 | e += strspn(e, WHITESPACE); | |
2862 | ||
2863 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2864 | if (startswith(e, table[i].suffix)) { | |
2865 | r += (nsec_t) l * table[i].nsec; | |
2866 | p = e + strlen(table[i].suffix); | |
2867 | break; | |
2868 | } | |
2869 | ||
2870 | if (i >= ELEMENTSOF(table)) | |
2871 | return -EINVAL; | |
2872 | ||
2873 | } while (*p != 0); | |
2874 | ||
2875 | *nsec = r; | |
2876 | ||
2877 | return 0; | |
2878 | } | |
2879 | ||
ab1f0633 LP |
2880 | int parse_bytes(const char *t, off_t *bytes) { |
2881 | static const struct { | |
2882 | const char *suffix; | |
2883 | off_t factor; | |
2884 | } table[] = { | |
2885 | { "B", 1 }, | |
2886 | { "K", 1024ULL }, | |
2887 | { "M", 1024ULL*1024ULL }, | |
2888 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2889 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2890 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2891 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2892 | { "", 1 }, |
2893 | }; | |
2894 | ||
2895 | const char *p; | |
2896 | off_t r = 0; | |
2897 | ||
2898 | assert(t); | |
2899 | assert(bytes); | |
2900 | ||
2901 | p = t; | |
2902 | do { | |
2903 | long long l; | |
2904 | char *e; | |
2905 | unsigned i; | |
2906 | ||
2907 | errno = 0; | |
2908 | l = strtoll(p, &e, 10); | |
2909 | ||
2910 | if (errno != 0) | |
2911 | return -errno; | |
2912 | ||
2913 | if (l < 0) | |
2914 | return -ERANGE; | |
2915 | ||
2916 | if (e == p) | |
2917 | return -EINVAL; | |
2918 | ||
2919 | e += strspn(e, WHITESPACE); | |
2920 | ||
2921 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2922 | if (startswith(e, table[i].suffix)) { | |
2923 | r += (off_t) l * table[i].factor; | |
2924 | p = e + strlen(table[i].suffix); | |
2925 | break; | |
2926 | } | |
2927 | ||
2928 | if (i >= ELEMENTSOF(table)) | |
2929 | return -EINVAL; | |
2930 | ||
2931 | } while (*p != 0); | |
2932 | ||
2933 | *bytes = r; | |
2934 | ||
2935 | return 0; | |
2936 | } | |
2937 | ||
843d2643 LP |
2938 | int make_stdio(int fd) { |
2939 | int r, s, t; | |
2940 | ||
2941 | assert(fd >= 0); | |
2942 | ||
2943 | r = dup2(fd, STDIN_FILENO); | |
2944 | s = dup2(fd, STDOUT_FILENO); | |
2945 | t = dup2(fd, STDERR_FILENO); | |
2946 | ||
2947 | if (fd >= 3) | |
2948 | close_nointr_nofail(fd); | |
2949 | ||
2950 | if (r < 0 || s < 0 || t < 0) | |
2951 | return -errno; | |
2952 | ||
7862f62d LP |
2953 | fd_cloexec(STDIN_FILENO, false); |
2954 | fd_cloexec(STDOUT_FILENO, false); | |
2955 | fd_cloexec(STDERR_FILENO, false); | |
2956 | ||
843d2643 LP |
2957 | return 0; |
2958 | } | |
2959 | ||
ade509ce LP |
2960 | int make_null_stdio(void) { |
2961 | int null_fd; | |
2962 | ||
cd3bd60a LP |
2963 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2964 | if (null_fd < 0) | |
ade509ce LP |
2965 | return -errno; |
2966 | ||
2967 | return make_stdio(null_fd); | |
2968 | } | |
2969 | ||
8407a5d0 LP |
2970 | bool is_device_path(const char *path) { |
2971 | ||
2972 | /* Returns true on paths that refer to a device, either in | |
2973 | * sysfs or in /dev */ | |
2974 | ||
2975 | return | |
2976 | path_startswith(path, "/dev/") || | |
2977 | path_startswith(path, "/sys/"); | |
2978 | } | |
2979 | ||
01f78473 LP |
2980 | int dir_is_empty(const char *path) { |
2981 | DIR *d; | |
2982 | int r; | |
2983 | struct dirent buf, *de; | |
2984 | ||
2985 | if (!(d = opendir(path))) | |
2986 | return -errno; | |
2987 | ||
2988 | for (;;) { | |
2989 | if ((r = readdir_r(d, &buf, &de)) > 0) { | |
2990 | r = -r; | |
2991 | break; | |
2992 | } | |
2993 | ||
2994 | if (!de) { | |
2995 | r = 1; | |
2996 | break; | |
2997 | } | |
2998 | ||
2999 | if (!ignore_file(de->d_name)) { | |
3000 | r = 0; | |
3001 | break; | |
3002 | } | |
3003 | } | |
3004 | ||
3005 | closedir(d); | |
3006 | return r; | |
3007 | } | |
3008 | ||
d3782d60 LP |
3009 | unsigned long long random_ull(void) { |
3010 | int fd; | |
3011 | uint64_t ull; | |
3012 | ssize_t r; | |
3013 | ||
ac0930c8 LP |
3014 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
3015 | if (fd < 0) | |
d3782d60 LP |
3016 | goto fallback; |
3017 | ||
eb22ac37 | 3018 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
3019 | close_nointr_nofail(fd); |
3020 | ||
3021 | if (r != sizeof(ull)) | |
3022 | goto fallback; | |
3023 | ||
3024 | return ull; | |
3025 | ||
3026 | fallback: | |
3027 | return random() * RAND_MAX + random(); | |
3028 | } | |
3029 | ||
5b6319dc LP |
3030 | void rename_process(const char name[8]) { |
3031 | assert(name); | |
3032 | ||
5d6b1584 LP |
3033 | /* This is a like a poor man's setproctitle(). It changes the |
3034 | * comm field, argv[0], and also the glibc's internally used | |
3035 | * name of the process. For the first one a limit of 16 chars | |
3036 | * applies, to the second one usually one of 10 (i.e. length | |
3037 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
3038 | * "systemd"). If you pass a longer string it will be | |
3039 | * truncated */ | |
5b6319dc | 3040 | |
5d6b1584 | 3041 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
3042 | |
3043 | if (program_invocation_name) | |
3044 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
3045 | |
3046 | if (saved_argc > 0) { | |
3047 | int i; | |
3048 | ||
3049 | if (saved_argv[0]) | |
3050 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
3051 | ||
3052 | for (i = 1; i < saved_argc; i++) { | |
3053 | if (!saved_argv[i]) | |
3054 | break; | |
3055 | ||
3056 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
3057 | } | |
3058 | } | |
5b6319dc LP |
3059 | } |
3060 | ||
7d793605 LP |
3061 | void sigset_add_many(sigset_t *ss, ...) { |
3062 | va_list ap; | |
3063 | int sig; | |
3064 | ||
3065 | assert(ss); | |
3066 | ||
3067 | va_start(ap, ss); | |
3068 | while ((sig = va_arg(ap, int)) > 0) | |
3069 | assert_se(sigaddset(ss, sig) == 0); | |
3070 | va_end(ap); | |
3071 | } | |
3072 | ||
ef2f1067 LP |
3073 | char* gethostname_malloc(void) { |
3074 | struct utsname u; | |
3075 | ||
3076 | assert_se(uname(&u) >= 0); | |
3077 | ||
344de609 | 3078 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
3079 | return strdup(u.nodename); |
3080 | ||
3081 | return strdup(u.sysname); | |
3082 | } | |
3083 | ||
344de609 LP |
3084 | bool hostname_is_set(void) { |
3085 | struct utsname u; | |
3086 | ||
3087 | assert_se(uname(&u) >= 0); | |
3088 | ||
3089 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
3090 | } | |
3091 | ||
7c5f152a | 3092 | static char *lookup_uid(uid_t uid) { |
ef2f1067 LP |
3093 | long bufsize; |
3094 | char *buf, *name; | |
3095 | struct passwd pwbuf, *pw = NULL; | |
ef2f1067 LP |
3096 | |
3097 | /* Shortcut things to avoid NSS lookups */ | |
3098 | if (uid == 0) | |
3099 | return strdup("root"); | |
3100 | ||
7c5f152a LP |
3101 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
3102 | if (bufsize <= 0) | |
ef2f1067 LP |
3103 | bufsize = 4096; |
3104 | ||
7c5f152a LP |
3105 | buf = malloc(bufsize); |
3106 | if (!buf) | |
ef2f1067 LP |
3107 | return NULL; |
3108 | ||
3109 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) { | |
3110 | name = strdup(pw->pw_name); | |
3111 | free(buf); | |
3112 | return name; | |
3113 | } | |
3114 | ||
3115 | free(buf); | |
3116 | ||
3117 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
3118 | return NULL; | |
3119 | ||
3120 | return name; | |
3121 | } | |
3122 | ||
7c5f152a LP |
3123 | char* getlogname_malloc(void) { |
3124 | uid_t uid; | |
3125 | struct stat st; | |
3126 | ||
3127 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
3128 | uid = st.st_uid; | |
3129 | else | |
3130 | uid = getuid(); | |
3131 | ||
3132 | return lookup_uid(uid); | |
3133 | } | |
3134 | ||
3135 | char *getusername_malloc(void) { | |
3136 | const char *e; | |
3137 | ||
3138 | e = getenv("USER"); | |
3139 | if (e) | |
3140 | return strdup(e); | |
3141 | ||
3142 | return lookup_uid(getuid()); | |
3143 | } | |
3144 | ||
fc116c6a LP |
3145 | int getttyname_malloc(int fd, char **r) { |
3146 | char path[PATH_MAX], *c; | |
618e02c7 | 3147 | int k; |
8c6db833 LP |
3148 | |
3149 | assert(r); | |
ef2f1067 | 3150 | |
fc116c6a | 3151 | if ((k = ttyname_r(fd, path, sizeof(path))) != 0) |
618e02c7 | 3152 | return -k; |
ef2f1067 LP |
3153 | |
3154 | char_array_0(path); | |
3155 | ||
fc116c6a | 3156 | if (!(c = strdup(startswith(path, "/dev/") ? path + 5 : path))) |
8c6db833 LP |
3157 | return -ENOMEM; |
3158 | ||
3159 | *r = c; | |
3160 | return 0; | |
3161 | } | |
3162 | ||
fc116c6a LP |
3163 | int getttyname_harder(int fd, char **r) { |
3164 | int k; | |
3165 | char *s; | |
3166 | ||
3167 | if ((k = getttyname_malloc(fd, &s)) < 0) | |
3168 | return k; | |
3169 | ||
3170 | if (streq(s, "tty")) { | |
3171 | free(s); | |
4d6d6518 | 3172 | return get_ctty(0, NULL, r); |
fc116c6a LP |
3173 | } |
3174 | ||
3175 | *r = s; | |
3176 | return 0; | |
3177 | } | |
3178 | ||
4d6d6518 | 3179 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
fc116c6a | 3180 | int k; |
4d6d6518 | 3181 | char line[LINE_MAX], *p, *fn; |
fc116c6a LP |
3182 | unsigned long ttynr; |
3183 | FILE *f; | |
3184 | ||
4d6d6518 LP |
3185 | if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0) |
3186 | return -ENOMEM; | |
3187 | ||
3188 | f = fopen(fn, "re"); | |
3189 | free(fn); | |
3190 | if (!f) | |
fc116c6a LP |
3191 | return -errno; |
3192 | ||
4d6d6518 | 3193 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 3194 | k = feof(f) ? -EIO : -errno; |
fc116c6a LP |
3195 | fclose(f); |
3196 | return k; | |
3197 | } | |
3198 | ||
3199 | fclose(f); | |
3200 | ||
4d6d6518 LP |
3201 | p = strrchr(line, ')'); |
3202 | if (!p) | |
fc116c6a LP |
3203 | return -EIO; |
3204 | ||
3205 | p++; | |
3206 | ||
3207 | if (sscanf(p, " " | |
3208 | "%*c " /* state */ | |
3209 | "%*d " /* ppid */ | |
3210 | "%*d " /* pgrp */ | |
3211 | "%*d " /* session */ | |
3212 | "%lu ", /* ttynr */ | |
3213 | &ttynr) != 1) | |
3214 | return -EIO; | |
3215 | ||
3216 | *d = (dev_t) ttynr; | |
3217 | return 0; | |
3218 | } | |
3219 | ||
4d6d6518 | 3220 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 3221 | int k; |
20c03b7b | 3222 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
3223 | dev_t devnr; |
3224 | ||
3225 | assert(r); | |
3226 | ||
4d6d6518 LP |
3227 | k = get_ctty_devnr(pid, &devnr); |
3228 | if (k < 0) | |
fc116c6a LP |
3229 | return k; |
3230 | ||
3231 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
3232 | char_array_0(fn); | |
3233 | ||
3234 | if ((k = readlink_malloc(fn, &s)) < 0) { | |
3235 | ||
3236 | if (k != -ENOENT) | |
3237 | return k; | |
3238 | ||
46824d0e LP |
3239 | /* This is an ugly hack */ |
3240 | if (major(devnr) == 136) { | |
3241 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
3242 | return -ENOMEM; | |
3243 | ||
3244 | *r = b; | |
3245 | if (_devnr) | |
3246 | *_devnr = devnr; | |
3247 | ||
3248 | return 0; | |
3249 | } | |
3250 | ||
fc116c6a LP |
3251 | /* Probably something like the ptys which have no |
3252 | * symlink in /dev/char. Let's return something | |
3253 | * vaguely useful. */ | |
3254 | ||
3255 | if (!(b = strdup(fn + 5))) | |
3256 | return -ENOMEM; | |
3257 | ||
3258 | *r = b; | |
46824d0e LP |
3259 | if (_devnr) |
3260 | *_devnr = devnr; | |
3261 | ||
fc116c6a LP |
3262 | return 0; |
3263 | } | |
3264 | ||
3265 | if (startswith(s, "/dev/")) | |
3266 | p = s + 5; | |
3267 | else if (startswith(s, "../")) | |
3268 | p = s + 3; | |
3269 | else | |
3270 | p = s; | |
3271 | ||
3272 | b = strdup(p); | |
3273 | free(s); | |
3274 | ||
3275 | if (!b) | |
3276 | return -ENOMEM; | |
3277 | ||
3278 | *r = b; | |
46824d0e LP |
3279 | if (_devnr) |
3280 | *_devnr = devnr; | |
3281 | ||
fc116c6a LP |
3282 | return 0; |
3283 | } | |
3284 | ||
f56d5db9 | 3285 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
3286 | DIR *d; |
3287 | int ret = 0; | |
3288 | ||
3289 | assert(fd >= 0); | |
3290 | ||
3291 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 3292 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 3293 | |
d4d046e3 LP |
3294 | d = fdopendir(fd); |
3295 | if (!d) { | |
8c6db833 | 3296 | close_nointr_nofail(fd); |
4c633005 LP |
3297 | |
3298 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
3299 | } |
3300 | ||
3301 | for (;;) { | |
3302 | struct dirent buf, *de; | |
7925c22a LP |
3303 | bool is_dir, keep_around; |
3304 | struct stat st; | |
8c6db833 LP |
3305 | int r; |
3306 | ||
d4d046e3 LP |
3307 | r = readdir_r(d, &buf, &de); |
3308 | if (r != 0 && ret == 0) { | |
3309 | ret = -r; | |
8c6db833 LP |
3310 | break; |
3311 | } | |
3312 | ||
3313 | if (!de) | |
3314 | break; | |
3315 | ||
3316 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
3317 | continue; | |
3318 | ||
7925c22a LP |
3319 | if (de->d_type == DT_UNKNOWN || |
3320 | honour_sticky || | |
3321 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 3322 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 3323 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3324 | ret = -errno; |
3325 | continue; | |
3326 | } | |
3327 | ||
3328 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
3329 | keep_around = |
3330 | honour_sticky && | |
3331 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
3332 | (st.st_mode & S_ISVTX); | |
ad293f5a | 3333 | } else { |
8c6db833 | 3334 | is_dir = de->d_type == DT_DIR; |
7925c22a | 3335 | keep_around = false; |
ad293f5a | 3336 | } |
8c6db833 LP |
3337 | |
3338 | if (is_dir) { | |
3339 | int subdir_fd; | |
8c6db833 | 3340 | |
597f43c7 | 3341 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
3342 | if (root_dev && st.st_dev != root_dev->st_dev) |
3343 | continue; | |
8c6db833 | 3344 | |
7925c22a LP |
3345 | subdir_fd = openat(fd, de->d_name, |
3346 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
3347 | if (subdir_fd < 0) { | |
3348 | if (ret == 0 && errno != ENOENT) | |
3349 | ret = -errno; | |
3350 | continue; | |
3351 | } | |
3352 | ||
3353 | r = rm_rf_children(subdir_fd, only_dirs, honour_sticky, root_dev); | |
3354 | if (r < 0 && ret == 0) | |
3355 | ret = r; | |
3356 | ||
3357 | if (!keep_around) | |
3358 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
3359 | if (ret == 0 && errno != ENOENT) |
3360 | ret = -errno; | |
3361 | } | |
3362 | ||
3363 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
3364 | |
3365 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3366 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3367 | ret = -errno; |
3368 | } | |
3369 | } | |
3370 | } | |
3371 | ||
3372 | closedir(d); | |
3373 | ||
3374 | return ret; | |
3375 | } | |
3376 | ||
f56d5db9 LP |
3377 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
3378 | struct statfs s; | |
3379 | ||
3380 | assert(fd >= 0); | |
3381 | ||
3382 | if (fstatfs(fd, &s) < 0) { | |
3383 | close_nointr_nofail(fd); | |
3384 | return -errno; | |
3385 | } | |
3386 | ||
3387 | /* We refuse to clean disk file systems with this call. This | |
3388 | * is extra paranoia just to be sure we never ever remove | |
3389 | * non-state data */ | |
3390 | ||
3391 | if (s.f_type != TMPFS_MAGIC && | |
3392 | s.f_type != RAMFS_MAGIC) { | |
3393 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3394 | close_nointr_nofail(fd); | |
3395 | return -EPERM; | |
3396 | } | |
3397 | ||
3398 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
3399 | } | |
3400 | ||
3401 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
3402 | int fd, r; | |
3403 | struct statfs s; | |
8c6db833 LP |
3404 | |
3405 | assert(path); | |
3406 | ||
f56d5db9 LP |
3407 | /* We refuse to clean the root file system with this |
3408 | * call. This is extra paranoia to never cause a really | |
3409 | * seriously broken system. */ | |
3410 | if (path_equal(path, "/")) { | |
3411 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
3412 | return -EPERM; | |
3413 | } | |
461b1822 | 3414 | |
d4d046e3 LP |
3415 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
3416 | if (fd < 0) { | |
8c6db833 LP |
3417 | |
3418 | if (errno != ENOTDIR) | |
3419 | return -errno; | |
3420 | ||
f56d5db9 LP |
3421 | if (!dangerous) { |
3422 | if (statfs(path, &s) < 0) | |
3423 | return -errno; | |
3424 | ||
3425 | if (s.f_type != TMPFS_MAGIC && | |
3426 | s.f_type != RAMFS_MAGIC) { | |
3427 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3428 | return -EPERM; | |
3429 | } | |
3430 | } | |
3431 | ||
8c6db833 | 3432 | if (delete_root && !only_dirs) |
d4d046e3 | 3433 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
3434 | return -errno; |
3435 | ||
3436 | return 0; | |
3437 | } | |
3438 | ||
f56d5db9 LP |
3439 | if (!dangerous) { |
3440 | if (fstatfs(fd, &s) < 0) { | |
3441 | close_nointr_nofail(fd); | |
3442 | return -errno; | |
3443 | } | |
ad293f5a | 3444 | |
f56d5db9 LP |
3445 | if (s.f_type != TMPFS_MAGIC && |
3446 | s.f_type != RAMFS_MAGIC) { | |
3447 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3448 | close_nointr_nofail(fd); | |
3449 | return -EPERM; | |
3450 | } | |
3451 | } | |
3452 | ||
3453 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
3454 | if (delete_root) { |
3455 | ||
8d53b453 | 3456 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 3457 | return r; |
8c6db833 | 3458 | |
e27796a0 | 3459 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
3460 | if (r == 0) |
3461 | r = -errno; | |
3462 | } | |
ad293f5a | 3463 | } |
8c6db833 LP |
3464 | |
3465 | return r; | |
3466 | } | |
3467 | ||
f56d5db9 LP |
3468 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
3469 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
3470 | } | |
3471 | ||
3472 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
3473 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
3474 | } | |
3475 | ||
8c6db833 LP |
3476 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
3477 | assert(path); | |
3478 | ||
3479 | /* Under the assumption that we are running privileged we | |
3480 | * first change the access mode and only then hand out | |
3481 | * ownership to avoid a window where access is too open. */ | |
3482 | ||
8d53b453 LP |
3483 | if (mode != (mode_t) -1) |
3484 | if (chmod(path, mode) < 0) | |
3485 | return -errno; | |
8c6db833 | 3486 | |
8d53b453 LP |
3487 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
3488 | if (chown(path, uid, gid) < 0) | |
3489 | return -errno; | |
8c6db833 LP |
3490 | |
3491 | return 0; | |
ef2f1067 LP |
3492 | } |
3493 | ||
f4b47811 LP |
3494 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
3495 | assert(fd >= 0); | |
3496 | ||
3497 | /* Under the assumption that we are running privileged we | |
3498 | * first change the access mode and only then hand out | |
3499 | * ownership to avoid a window where access is too open. */ | |
3500 | ||
3501 | if (fchmod(fd, mode) < 0) | |
3502 | return -errno; | |
3503 | ||
3504 | if (fchown(fd, uid, gid) < 0) | |
3505 | return -errno; | |
3506 | ||
3507 | return 0; | |
3508 | } | |
3509 | ||
82c121a4 LP |
3510 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3511 | cpu_set_t *r; | |
3512 | unsigned n = 1024; | |
3513 | ||
3514 | /* Allocates the cpuset in the right size */ | |
3515 | ||
3516 | for (;;) { | |
3517 | if (!(r = CPU_ALLOC(n))) | |
3518 | return NULL; | |
3519 | ||
3520 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3521 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3522 | ||
3523 | if (ncpus) | |
3524 | *ncpus = n; | |
3525 | ||
3526 | return r; | |
3527 | } | |
3528 | ||
3529 | CPU_FREE(r); | |
3530 | ||
3531 | if (errno != EINVAL) | |
3532 | return NULL; | |
3533 | ||
3534 | n *= 2; | |
3535 | } | |
3536 | } | |
3537 | ||
67e5cc4f | 3538 | void status_vprintf(const char *status, bool ellipse, const char *format, va_list ap) { |
9ab7a8d2 MS |
3539 | char *s = NULL; |
3540 | static const char status_indent[] = " "; /* "[" STATUS "] " */ | |
3541 | int fd = -1; | |
81beb750 LP |
3542 | struct iovec iovec[5]; |
3543 | int n = 0; | |
9e58ff9c LP |
3544 | |
3545 | assert(format); | |
3546 | ||
9ab7a8d2 | 3547 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
3548 | * optional and go exclusively to the console. */ |
3549 | ||
3550 | if (vasprintf(&s, format, ap) < 0) | |
3551 | goto finish; | |
3552 | ||
67e5cc4f | 3553 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 3554 | if (fd < 0) |
9e58ff9c LP |
3555 | goto finish; |
3556 | ||
67e5cc4f | 3557 | if (ellipse) { |
9ab7a8d2 MS |
3558 | char *e; |
3559 | size_t emax, sl; | |
3560 | int c; | |
3561 | ||
67e5cc4f LP |
3562 | c = fd_columns(fd); |
3563 | if (c <= 0) | |
3564 | c = 80; | |
81beb750 | 3565 | |
9ab7a8d2 MS |
3566 | sl = status ? strlen(status_indent) : 0; |
3567 | ||
3568 | emax = c - sl - 1; | |
3569 | if (emax < 3) | |
3570 | emax = 3; | |
81beb750 | 3571 | |
67e5cc4f LP |
3572 | e = ellipsize(s, emax, 75); |
3573 | if (e) { | |
3574 | free(s); | |
3575 | s = e; | |
3576 | } | |
81beb750 LP |
3577 | } |
3578 | ||
3579 | zero(iovec); | |
81beb750 | 3580 | |
9ab7a8d2 MS |
3581 | if (status) { |
3582 | if (!isempty(status)) { | |
3583 | IOVEC_SET_STRING(iovec[n++], "["); | |
3584 | IOVEC_SET_STRING(iovec[n++], status); | |
3585 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3586 | } else | |
3587 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3588 | } |
3589 | ||
9ab7a8d2 MS |
3590 | IOVEC_SET_STRING(iovec[n++], s); |
3591 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 LP |
3592 | |
3593 | writev(fd, iovec, n); | |
9e58ff9c LP |
3594 | |
3595 | finish: | |
3596 | free(s); | |
3597 | ||
3598 | if (fd >= 0) | |
3599 | close_nointr_nofail(fd); | |
3600 | } | |
3601 | ||
67e5cc4f | 3602 | void status_printf(const char *status, bool ellipse, const char *format, ...) { |
c846ff47 LP |
3603 | va_list ap; |
3604 | ||
3605 | assert(format); | |
3606 | ||
3607 | va_start(ap, format); | |
67e5cc4f | 3608 | status_vprintf(status, ellipse, format, ap); |
c846ff47 LP |
3609 | va_end(ap); |
3610 | } | |
3611 | ||
3612 | void status_welcome(void) { | |
10aa7034 LP |
3613 | char *pretty_name = NULL, *ansi_color = NULL; |
3614 | const char *const_pretty = NULL, *const_color = NULL; | |
3615 | int r; | |
c846ff47 | 3616 | |
10aa7034 LP |
3617 | if ((r = parse_env_file("/etc/os-release", NEWLINE, |
3618 | "PRETTY_NAME", &pretty_name, | |
3619 | "ANSI_COLOR", &ansi_color, | |
3620 | NULL)) < 0) { | |
c846ff47 | 3621 | |
10aa7034 LP |
3622 | if (r != -ENOENT) |
3623 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3624 | } | |
c846ff47 | 3625 | |
10aa7034 LP |
3626 | if (!pretty_name && !const_pretty) |
3627 | const_pretty = "Linux"; | |
3628 | ||
3629 | if (!ansi_color && !const_color) | |
3630 | const_color = "1"; | |
3631 | ||
81beb750 | 3632 | status_printf(NULL, |
67e5cc4f | 3633 | false, |
81beb750 | 3634 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", |
10aa7034 LP |
3635 | const_color ? const_color : ansi_color, |
3636 | const_pretty ? const_pretty : pretty_name); | |
86a3475b LP |
3637 | |
3638 | free(ansi_color); | |
3639 | free(pretty_name); | |
c846ff47 LP |
3640 | } |
3641 | ||
fab56fc5 LP |
3642 | char *replace_env(const char *format, char **env) { |
3643 | enum { | |
3644 | WORD, | |
c24eb49e | 3645 | CURLY, |
fab56fc5 LP |
3646 | VARIABLE |
3647 | } state = WORD; | |
3648 | ||
3649 | const char *e, *word = format; | |
3650 | char *r = NULL, *k; | |
3651 | ||
3652 | assert(format); | |
3653 | ||
3654 | for (e = format; *e; e ++) { | |
3655 | ||
3656 | switch (state) { | |
3657 | ||
3658 | case WORD: | |
3659 | if (*e == '$') | |
c24eb49e | 3660 | state = CURLY; |
fab56fc5 LP |
3661 | break; |
3662 | ||
c24eb49e LP |
3663 | case CURLY: |
3664 | if (*e == '{') { | |
fab56fc5 LP |
3665 | if (!(k = strnappend(r, word, e-word-1))) |
3666 | goto fail; | |
3667 | ||
3668 | free(r); | |
3669 | r = k; | |
3670 | ||
3671 | word = e-1; | |
3672 | state = VARIABLE; | |
3673 | ||
3674 | } else if (*e == '$') { | |
3675 | if (!(k = strnappend(r, word, e-word))) | |
3676 | goto fail; | |
3677 | ||
3678 | free(r); | |
3679 | r = k; | |
3680 | ||
3681 | word = e+1; | |
3682 | state = WORD; | |
3683 | } else | |
3684 | state = WORD; | |
3685 | break; | |
3686 | ||
3687 | case VARIABLE: | |
c24eb49e | 3688 | if (*e == '}') { |
b95cf362 | 3689 | const char *t; |
fab56fc5 | 3690 | |
b95cf362 LP |
3691 | if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) |
3692 | t = ""; | |
fab56fc5 | 3693 | |
b95cf362 LP |
3694 | if (!(k = strappend(r, t))) |
3695 | goto fail; | |
fab56fc5 | 3696 | |
b95cf362 LP |
3697 | free(r); |
3698 | r = k; | |
fab56fc5 | 3699 | |
b95cf362 | 3700 | word = e+1; |
fab56fc5 LP |
3701 | state = WORD; |
3702 | } | |
3703 | break; | |
3704 | } | |
3705 | } | |
3706 | ||
3707 | if (!(k = strnappend(r, word, e-word))) | |
3708 | goto fail; | |
3709 | ||
3710 | free(r); | |
3711 | return k; | |
3712 | ||
3713 | fail: | |
3714 | free(r); | |
3715 | return NULL; | |
3716 | } | |
3717 | ||
3718 | char **replace_env_argv(char **argv, char **env) { | |
3719 | char **r, **i; | |
c24eb49e LP |
3720 | unsigned k = 0, l = 0; |
3721 | ||
3722 | l = strv_length(argv); | |
fab56fc5 | 3723 | |
c24eb49e | 3724 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3725 | return NULL; |
3726 | ||
3727 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3728 | |
3729 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3730 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3731 | char *e; | |
3732 | char **w, **m; | |
3733 | unsigned q; | |
c24eb49e | 3734 | |
b95cf362 | 3735 | if ((e = strv_env_get(env, *i+1))) { |
c24eb49e LP |
3736 | |
3737 | if (!(m = strv_split_quoted(e))) { | |
3738 | r[k] = NULL; | |
3739 | strv_free(r); | |
3740 | return NULL; | |
3741 | } | |
b95cf362 LP |
3742 | } else |
3743 | m = NULL; | |
c24eb49e | 3744 | |
b95cf362 LP |
3745 | q = strv_length(m); |
3746 | l = l + q - 1; | |
c24eb49e | 3747 | |
b95cf362 LP |
3748 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3749 | r[k] = NULL; | |
3750 | strv_free(r); | |
3751 | strv_free(m); | |
3752 | return NULL; | |
3753 | } | |
c24eb49e | 3754 | |
b95cf362 LP |
3755 | r = w; |
3756 | if (m) { | |
c24eb49e LP |
3757 | memcpy(r + k, m, q * sizeof(char*)); |
3758 | free(m); | |
c24eb49e | 3759 | } |
b95cf362 LP |
3760 | |
3761 | k += q; | |
3762 | continue; | |
c24eb49e LP |
3763 | } |
3764 | ||
3765 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3766 | if (!(r[k++] = replace_env(*i, env))) { |
3767 | strv_free(r); | |
3768 | return NULL; | |
3769 | } | |
3770 | } | |
3771 | ||
3772 | r[k] = NULL; | |
3773 | return r; | |
3774 | } | |
3775 | ||
81beb750 LP |
3776 | int fd_columns(int fd) { |
3777 | struct winsize ws; | |
3778 | zero(ws); | |
3779 | ||
3780 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3781 | return -errno; | |
3782 | ||
3783 | if (ws.ws_col <= 0) | |
3784 | return -EIO; | |
3785 | ||
3786 | return ws.ws_col; | |
3787 | } | |
3788 | ||
11f96fac ZJS |
3789 | static unsigned columns_cached(bool cached) { |
3790 | static __thread int parsed_columns = 0, env_columns = -1; | |
fa776d8e LP |
3791 | const char *e; |
3792 | ||
11f96fac | 3793 | if (_likely_(parsed_columns > 0 && cached)) |
fa776d8e LP |
3794 | return parsed_columns; |
3795 | ||
11f96fac ZJS |
3796 | if (_unlikely_(env_columns == -1)) { |
3797 | e = getenv("COLUMNS"); | |
3798 | if (e) | |
3799 | env_columns = atoi(e); | |
3800 | else | |
3801 | env_columns = 0; | |
3802 | } | |
fa776d8e | 3803 | |
11f96fac ZJS |
3804 | if (env_columns > 0) { |
3805 | parsed_columns = env_columns; | |
3806 | return parsed_columns; | |
3807 | } | |
3808 | ||
3809 | if (parsed_columns <= 0 || !cached) | |
81beb750 | 3810 | parsed_columns = fd_columns(STDOUT_FILENO); |
fa776d8e LP |
3811 | |
3812 | if (parsed_columns <= 0) | |
3813 | parsed_columns = 80; | |
3814 | ||
3815 | return parsed_columns; | |
3816 | } | |
3817 | ||
11f96fac ZJS |
3818 | unsigned columns(void) { |
3819 | return columns_cached(true); | |
3820 | } | |
3821 | ||
3822 | unsigned columns_uncached(void) { | |
3823 | return columns_cached(false); | |
3824 | } | |
3825 | ||
8f2d43a0 LP |
3826 | int fd_lines(int fd) { |
3827 | struct winsize ws; | |
3828 | zero(ws); | |
3829 | ||
3830 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3831 | return -errno; | |
3832 | ||
3833 | if (ws.ws_row <= 0) | |
3834 | return -EIO; | |
3835 | ||
3836 | return ws.ws_row; | |
3837 | } | |
3838 | ||
3839 | unsigned lines(void) { | |
3840 | static __thread int parsed_lines = 0; | |
3841 | const char *e; | |
3842 | ||
3843 | if (_likely_(parsed_lines > 0)) | |
3844 | return parsed_lines; | |
3845 | ||
3846 | e = getenv("LINES"); | |
3847 | if (e) | |
3848 | parsed_lines = atoi(e); | |
3849 | ||
3850 | if (parsed_lines <= 0) | |
3851 | parsed_lines = fd_lines(STDOUT_FILENO); | |
3852 | ||
3853 | if (parsed_lines <= 0) | |
3854 | parsed_lines = 25; | |
3855 | ||
3856 | return parsed_lines; | |
3857 | } | |
3858 | ||
b4f10a5e LP |
3859 | int running_in_chroot(void) { |
3860 | struct stat a, b; | |
3861 | ||
3862 | zero(a); | |
3863 | zero(b); | |
3864 | ||
3865 | /* Only works as root */ | |
3866 | ||
3867 | if (stat("/proc/1/root", &a) < 0) | |
3868 | return -errno; | |
3869 | ||
3870 | if (stat("/", &b) < 0) | |
3871 | return -errno; | |
3872 | ||
3873 | return | |
3874 | a.st_dev != b.st_dev || | |
3875 | a.st_ino != b.st_ino; | |
3876 | } | |
3877 | ||
72f59706 LP |
3878 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3879 | size_t x; | |
8fe914ec LP |
3880 | char *r; |
3881 | ||
3882 | assert(s); | |
3883 | assert(percent <= 100); | |
72f59706 | 3884 | assert(new_length >= 3); |
8fe914ec | 3885 | |
72f59706 LP |
3886 | if (old_length <= 3 || old_length <= new_length) |
3887 | return strndup(s, old_length); | |
8fe914ec | 3888 | |
72f59706 LP |
3889 | r = new0(char, new_length+1); |
3890 | if (!r) | |
8fe914ec LP |
3891 | return r; |
3892 | ||
72f59706 | 3893 | x = (new_length * percent) / 100; |
8fe914ec | 3894 | |
72f59706 LP |
3895 | if (x > new_length - 3) |
3896 | x = new_length - 3; | |
8fe914ec LP |
3897 | |
3898 | memcpy(r, s, x); | |
3899 | r[x] = '.'; | |
3900 | r[x+1] = '.'; | |
3901 | r[x+2] = '.'; | |
3902 | memcpy(r + x + 3, | |
72f59706 LP |
3903 | s + old_length - (new_length - x - 3), |
3904 | new_length - x - 3); | |
8fe914ec LP |
3905 | |
3906 | return r; | |
3907 | } | |
3908 | ||
72f59706 LP |
3909 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3910 | return ellipsize_mem(s, strlen(s), length, percent); | |
3911 | } | |
3912 | ||
f6144808 LP |
3913 | int touch(const char *path) { |
3914 | int fd; | |
3915 | ||
3916 | assert(path); | |
3917 | ||
14f3c825 | 3918 | if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0) |
f6144808 LP |
3919 | return -errno; |
3920 | ||
3921 | close_nointr_nofail(fd); | |
3922 | return 0; | |
3923 | } | |
afea26ad | 3924 | |
97c4a07d | 3925 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3926 | size_t l; |
3927 | assert(s); | |
3928 | ||
31ed59c5 LP |
3929 | l = strlen(s); |
3930 | if (l < 2) | |
11ce3427 LP |
3931 | return strdup(s); |
3932 | ||
97c4a07d | 3933 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3934 | return strndup(s+1, l-2); |
3935 | ||
3936 | return strdup(s); | |
3937 | } | |
3938 | ||
5f7c426e LP |
3939 | char *normalize_env_assignment(const char *s) { |
3940 | char *name, *value, *p, *r; | |
3941 | ||
3942 | p = strchr(s, '='); | |
3943 | ||
3944 | if (!p) { | |
3945 | if (!(r = strdup(s))) | |
3946 | return NULL; | |
3947 | ||
3948 | return strstrip(r); | |
3949 | } | |
3950 | ||
3951 | if (!(name = strndup(s, p - s))) | |
3952 | return NULL; | |
3953 | ||
3954 | if (!(p = strdup(p+1))) { | |
3955 | free(name); | |
3956 | return NULL; | |
3957 | } | |
3958 | ||
3959 | value = unquote(strstrip(p), QUOTES); | |
3960 | free(p); | |
3961 | ||
3962 | if (!value) { | |
5f7c426e LP |
3963 | free(name); |
3964 | return NULL; | |
3965 | } | |
3966 | ||
3967 | if (asprintf(&r, "%s=%s", name, value) < 0) | |
3968 | r = NULL; | |
3969 | ||
3970 | free(value); | |
3971 | free(name); | |
3972 | ||
3973 | return r; | |
3974 | } | |
3975 | ||
8e12a6ae | 3976 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3977 | siginfo_t dummy; |
3978 | ||
2e78aa99 | 3979 | assert(pid >= 1); |
1968a360 LP |
3980 | |
3981 | if (!status) | |
3982 | status = &dummy; | |
2e78aa99 LP |
3983 | |
3984 | for (;;) { | |
8e12a6ae LP |
3985 | zero(*status); |
3986 | ||
3987 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3988 | |
3989 | if (errno == EINTR) | |
3990 | continue; | |
3991 | ||
3992 | return -errno; | |
3993 | } | |
3994 | ||
3995 | return 0; | |
3996 | } | |
3997 | } | |
3998 | ||
97c4a07d LP |
3999 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
4000 | int r; | |
4001 | siginfo_t status; | |
4002 | ||
4003 | assert(name); | |
4004 | assert(pid > 1); | |
4005 | ||
4006 | if ((r = wait_for_terminate(pid, &status)) < 0) { | |
4007 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); | |
4008 | return r; | |
4009 | } | |
4010 | ||
4011 | if (status.si_code == CLD_EXITED) { | |
4012 | if (status.si_status != 0) { | |
4013 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 4014 | return status.si_status; |
97c4a07d LP |
4015 | } |
4016 | ||
4017 | log_debug("%s succeeded.", name); | |
4018 | return 0; | |
4019 | ||
4020 | } else if (status.si_code == CLD_KILLED || | |
4021 | status.si_code == CLD_DUMPED) { | |
4022 | ||
4023 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
4024 | return -EPROTO; | |
4025 | } | |
4026 | ||
4027 | log_warning("%s failed due to unknown reason.", name); | |
4028 | return -EPROTO; | |
4029 | ||
4030 | } | |
4031 | ||
6a39419f | 4032 | _noreturn_ void freeze(void) { |
720ce21d LP |
4033 | |
4034 | /* Make sure nobody waits for us on a socket anymore */ | |
4035 | close_all_fds(NULL, 0); | |
4036 | ||
c29597a1 LP |
4037 | sync(); |
4038 | ||
3c14d26c LP |
4039 | for (;;) |
4040 | pause(); | |
4041 | } | |
4042 | ||
00dc5d76 LP |
4043 | bool null_or_empty(struct stat *st) { |
4044 | assert(st); | |
4045 | ||
4046 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
4047 | return true; | |
4048 | ||
c8f26f42 | 4049 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
4050 | return true; |
4051 | ||
4052 | return false; | |
4053 | } | |
4054 | ||
83096483 LP |
4055 | int null_or_empty_path(const char *fn) { |
4056 | struct stat st; | |
4057 | ||
4058 | assert(fn); | |
4059 | ||
4060 | if (stat(fn, &st) < 0) | |
4061 | return -errno; | |
4062 | ||
4063 | return null_or_empty(&st); | |
4064 | } | |
4065 | ||
a247755d | 4066 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
4067 | int nfd; |
4068 | DIR *d; | |
4069 | ||
4070 | if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0) | |
4071 | return NULL; | |
4072 | ||
4073 | if (!(d = fdopendir(nfd))) { | |
4074 | close_nointr_nofail(nfd); | |
4075 | return NULL; | |
4076 | } | |
4077 | ||
4078 | return d; | |
3b63d2d3 LP |
4079 | } |
4080 | ||
8a0867d6 LP |
4081 | int signal_from_string_try_harder(const char *s) { |
4082 | int signo; | |
4083 | assert(s); | |
4084 | ||
4085 | if ((signo = signal_from_string(s)) <= 0) | |
4086 | if (startswith(s, "SIG")) | |
4087 | return signal_from_string(s+3); | |
4088 | ||
4089 | return signo; | |
4090 | } | |
4091 | ||
10717a1a LP |
4092 | void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { |
4093 | ||
4094 | assert(f); | |
4095 | assert(name); | |
4096 | assert(t); | |
4097 | ||
4098 | if (!dual_timestamp_is_set(t)) | |
4099 | return; | |
4100 | ||
4101 | fprintf(f, "%s=%llu %llu\n", | |
4102 | name, | |
4103 | (unsigned long long) t->realtime, | |
4104 | (unsigned long long) t->monotonic); | |
4105 | } | |
4106 | ||
799fd0fd | 4107 | void dual_timestamp_deserialize(const char *value, dual_timestamp *t) { |
10717a1a LP |
4108 | unsigned long long a, b; |
4109 | ||
10717a1a LP |
4110 | assert(value); |
4111 | assert(t); | |
4112 | ||
4113 | if (sscanf(value, "%lli %llu", &a, &b) != 2) | |
4114 | log_debug("Failed to parse finish timestamp value %s", value); | |
4115 | else { | |
4116 | t->realtime = a; | |
4117 | t->monotonic = b; | |
4118 | } | |
4119 | } | |
4120 | ||
e23a0ce8 LP |
4121 | char *fstab_node_to_udev_node(const char *p) { |
4122 | char *dn, *t, *u; | |
4123 | int r; | |
4124 | ||
4125 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
4126 | * UTF8 chars unescaped */ | |
4127 | ||
4128 | if (startswith(p, "LABEL=")) { | |
4129 | ||
4130 | if (!(u = unquote(p+6, "\"\'"))) | |
4131 | return NULL; | |
4132 | ||
4133 | t = xescape(u, "/ "); | |
4134 | free(u); | |
4135 | ||
4136 | if (!t) | |
4137 | return NULL; | |
4138 | ||
4139 | r = asprintf(&dn, "/dev/disk/by-label/%s", t); | |
4140 | free(t); | |
4141 | ||
4142 | if (r < 0) | |
4143 | return NULL; | |
4144 | ||
4145 | return dn; | |
4146 | } | |
4147 | ||
4148 | if (startswith(p, "UUID=")) { | |
4149 | ||
4150 | if (!(u = unquote(p+5, "\"\'"))) | |
4151 | return NULL; | |
4152 | ||
4153 | t = xescape(u, "/ "); | |
4154 | free(u); | |
4155 | ||
4156 | if (!t) | |
4157 | return NULL; | |
4158 | ||
0058d7b9 | 4159 | r = asprintf(&dn, "/dev/disk/by-uuid/%s", t); |
e23a0ce8 LP |
4160 | free(t); |
4161 | ||
4162 | if (r < 0) | |
4163 | return NULL; | |
4164 | ||
4165 | return dn; | |
4166 | } | |
4167 | ||
4168 | return strdup(p); | |
4169 | } | |
4170 | ||
f212ac12 LP |
4171 | bool tty_is_vc(const char *tty) { |
4172 | assert(tty); | |
4173 | ||
4174 | if (startswith(tty, "/dev/")) | |
4175 | tty += 5; | |
4176 | ||
98a28fef LP |
4177 | return vtnr_from_tty(tty) >= 0; |
4178 | } | |
4179 | ||
d1122ad5 LP |
4180 | bool tty_is_console(const char *tty) { |
4181 | assert(tty); | |
4182 | ||
4183 | if (startswith(tty, "/dev/")) | |
4184 | tty += 5; | |
4185 | ||
4186 | return streq(tty, "console"); | |
4187 | } | |
4188 | ||
98a28fef LP |
4189 | int vtnr_from_tty(const char *tty) { |
4190 | int i, r; | |
4191 | ||
4192 | assert(tty); | |
4193 | ||
4194 | if (startswith(tty, "/dev/")) | |
4195 | tty += 5; | |
4196 | ||
4197 | if (!startswith(tty, "tty") ) | |
4198 | return -EINVAL; | |
4199 | ||
4200 | if (tty[3] < '0' || tty[3] > '9') | |
4201 | return -EINVAL; | |
4202 | ||
4203 | r = safe_atoi(tty+3, &i); | |
4204 | if (r < 0) | |
4205 | return r; | |
4206 | ||
4207 | if (i < 0 || i > 63) | |
4208 | return -EINVAL; | |
4209 | ||
4210 | return i; | |
f212ac12 LP |
4211 | } |
4212 | ||
3043935f | 4213 | bool tty_is_vc_resolve(const char *tty) { |
3030ccd7 | 4214 | char *active = NULL; |
3043935f | 4215 | bool b; |
3030ccd7 | 4216 | |
e3aa71c3 LP |
4217 | assert(tty); |
4218 | ||
4219 | if (startswith(tty, "/dev/")) | |
4220 | tty += 5; | |
4221 | ||
3d9a4122 LP |
4222 | /* Resolve where /dev/console is pointing to, if /sys is |
4223 | * actually ours (i.e. not read-only-mounted which is a sign | |
4224 | * for container setups) */ | |
4225 | if (streq(tty, "console") && path_is_read_only_fs("/sys") <= 0) | |
3030ccd7 | 4226 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { |
079a09fb LP |
4227 | /* If multiple log outputs are configured the |
4228 | * last one is what /dev/console points to */ | |
3043935f LP |
4229 | tty = strrchr(active, ' '); |
4230 | if (tty) | |
079a09fb LP |
4231 | tty++; |
4232 | else | |
4233 | tty = active; | |
3030ccd7 LP |
4234 | } |
4235 | ||
3043935f | 4236 | b = tty_is_vc(tty); |
3030ccd7 | 4237 | free(active); |
e3aa71c3 | 4238 | |
3043935f LP |
4239 | return b; |
4240 | } | |
4241 | ||
4242 | const char *default_term_for_tty(const char *tty) { | |
4243 | assert(tty); | |
4244 | ||
acda6a05 | 4245 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
4246 | } |
4247 | ||
87d2c1ff | 4248 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
4249 | assert(de); |
4250 | ||
4251 | if (ignore_file(de->d_name)) | |
4252 | return false; | |
4253 | ||
4254 | if (de->d_type != DT_REG && | |
4255 | de->d_type != DT_LNK && | |
4256 | de->d_type != DT_UNKNOWN) | |
4257 | return false; | |
4258 | ||
4259 | return true; | |
4260 | } | |
4261 | ||
87d2c1ff LP |
4262 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
4263 | assert(de); | |
4264 | ||
4265 | if (!dirent_is_file(de)) | |
4266 | return false; | |
4267 | ||
4268 | return endswith(de->d_name, suffix); | |
4269 | } | |
4270 | ||
83cc030f LP |
4271 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
4272 | DIR *_d = NULL; | |
4273 | struct dirent *de; | |
4274 | Hashmap *pids = NULL; | |
4275 | ||
4276 | assert(directory); | |
4277 | ||
4278 | /* Executes all binaries in a directory in parallel and waits | |
4279 | * until all they all finished. */ | |
4280 | ||
4281 | if (!d) { | |
4282 | if (!(_d = opendir(directory))) { | |
4283 | ||
4284 | if (errno == ENOENT) | |
4285 | return; | |
4286 | ||
4287 | log_error("Failed to enumerate directory %s: %m", directory); | |
4288 | return; | |
4289 | } | |
4290 | ||
4291 | d = _d; | |
4292 | } | |
4293 | ||
4294 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
4295 | log_error("Failed to allocate set."); | |
4296 | goto finish; | |
4297 | } | |
4298 | ||
4299 | while ((de = readdir(d))) { | |
4300 | char *path; | |
4301 | pid_t pid; | |
4302 | int k; | |
4303 | ||
fb19a739 | 4304 | if (!dirent_is_file(de)) |
83cc030f LP |
4305 | continue; |
4306 | ||
4307 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 4308 | log_oom(); |
83cc030f LP |
4309 | continue; |
4310 | } | |
4311 | ||
4312 | if ((pid = fork()) < 0) { | |
4313 | log_error("Failed to fork: %m"); | |
4314 | free(path); | |
4315 | continue; | |
4316 | } | |
4317 | ||
4318 | if (pid == 0) { | |
4319 | char *_argv[2]; | |
4320 | /* Child */ | |
4321 | ||
4322 | if (!argv) { | |
4323 | _argv[0] = path; | |
4324 | _argv[1] = NULL; | |
4325 | argv = _argv; | |
4326 | } else | |
6edd7d0a | 4327 | argv[0] = path; |
83cc030f LP |
4328 | |
4329 | execv(path, argv); | |
4330 | ||
4331 | log_error("Failed to execute %s: %m", path); | |
4332 | _exit(EXIT_FAILURE); | |
4333 | } | |
4334 | ||
4335 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
4336 | ||
4337 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
4338 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
4339 | free(path); | |
4340 | } | |
4341 | } | |
4342 | ||
4343 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 4344 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
83cc030f LP |
4345 | siginfo_t si; |
4346 | char *path; | |
4347 | ||
4348 | zero(si); | |
ec3f9b53 | 4349 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
4350 | |
4351 | if (errno == EINTR) | |
4352 | continue; | |
4353 | ||
4354 | log_error("waitid() failed: %m"); | |
4355 | goto finish; | |
4356 | } | |
4357 | ||
4358 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 4359 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
4360 | if (si.si_code == CLD_EXITED) |
4361 | log_error("%s exited with exit status %i.", path, si.si_status); | |
4362 | else | |
4363 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
4364 | } else | |
4365 | log_debug("%s exited successfully.", path); | |
4366 | ||
4367 | free(path); | |
4368 | } | |
4369 | } | |
4370 | ||
4371 | finish: | |
4372 | if (_d) | |
4373 | closedir(_d); | |
4374 | ||
4375 | if (pids) | |
4376 | hashmap_free_free(pids); | |
4377 | } | |
4378 | ||
430c18ed LP |
4379 | int kill_and_sigcont(pid_t pid, int sig) { |
4380 | int r; | |
4381 | ||
4382 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4383 | ||
4384 | if (r >= 0) | |
4385 | kill(pid, SIGCONT); | |
4386 | ||
4387 | return r; | |
4388 | } | |
4389 | ||
05feefe0 LP |
4390 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4391 | const char *i; | |
4392 | ||
4393 | if (!nulstr) | |
4394 | return false; | |
4395 | ||
4396 | NULSTR_FOREACH(i, nulstr) | |
4397 | if (streq(i, needle)) | |
4398 | return true; | |
4399 | ||
4400 | return false; | |
4401 | } | |
4402 | ||
6faa1114 | 4403 | bool plymouth_running(void) { |
9408a2d2 | 4404 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4405 | } |
4406 | ||
7c3b203c LP |
4407 | void parse_syslog_priority(char **p, int *priority) { |
4408 | int a = 0, b = 0, c = 0; | |
4409 | int k; | |
4410 | ||
4411 | assert(p); | |
4412 | assert(*p); | |
4413 | assert(priority); | |
4414 | ||
4415 | if ((*p)[0] != '<') | |
4416 | return; | |
4417 | ||
4418 | if (!strchr(*p, '>')) | |
4419 | return; | |
4420 | ||
4421 | if ((*p)[2] == '>') { | |
4422 | c = undecchar((*p)[1]); | |
4423 | k = 3; | |
4424 | } else if ((*p)[3] == '>') { | |
4425 | b = undecchar((*p)[1]); | |
4426 | c = undecchar((*p)[2]); | |
4427 | k = 4; | |
4428 | } else if ((*p)[4] == '>') { | |
4429 | a = undecchar((*p)[1]); | |
4430 | b = undecchar((*p)[2]); | |
4431 | c = undecchar((*p)[3]); | |
4432 | k = 5; | |
4433 | } else | |
4434 | return; | |
4435 | ||
4436 | if (a < 0 || b < 0 || c < 0) | |
4437 | return; | |
4438 | ||
4439 | *priority = a*100+b*10+c; | |
4440 | *p += k; | |
4441 | } | |
4442 | ||
87d2c1ff LP |
4443 | void skip_syslog_pid(char **buf) { |
4444 | char *p; | |
4445 | ||
4446 | assert(buf); | |
4447 | assert(*buf); | |
4448 | ||
4449 | p = *buf; | |
4450 | ||
4451 | if (*p != '[') | |
4452 | return; | |
4453 | ||
4454 | p++; | |
4455 | p += strspn(p, "0123456789"); | |
4456 | ||
4457 | if (*p != ']') | |
4458 | return; | |
4459 | ||
4460 | p++; | |
4461 | ||
4462 | *buf = p; | |
4463 | } | |
4464 | ||
4465 | void skip_syslog_date(char **buf) { | |
4466 | enum { | |
4467 | LETTER, | |
4468 | SPACE, | |
4469 | NUMBER, | |
4470 | SPACE_OR_NUMBER, | |
4471 | COLON | |
4472 | } sequence[] = { | |
4473 | LETTER, LETTER, LETTER, | |
4474 | SPACE, | |
4475 | SPACE_OR_NUMBER, NUMBER, | |
4476 | SPACE, | |
4477 | SPACE_OR_NUMBER, NUMBER, | |
4478 | COLON, | |
4479 | SPACE_OR_NUMBER, NUMBER, | |
4480 | COLON, | |
4481 | SPACE_OR_NUMBER, NUMBER, | |
4482 | SPACE | |
4483 | }; | |
4484 | ||
4485 | char *p; | |
4486 | unsigned i; | |
4487 | ||
4488 | assert(buf); | |
4489 | assert(*buf); | |
4490 | ||
4491 | p = *buf; | |
4492 | ||
4493 | for (i = 0; i < ELEMENTSOF(sequence); i++, p++) { | |
4494 | ||
4495 | if (!*p) | |
4496 | return; | |
4497 | ||
4498 | switch (sequence[i]) { | |
4499 | ||
4500 | case SPACE: | |
4501 | if (*p != ' ') | |
4502 | return; | |
4503 | break; | |
4504 | ||
4505 | case SPACE_OR_NUMBER: | |
4506 | if (*p == ' ') | |
4507 | break; | |
4508 | ||
4509 | /* fall through */ | |
4510 | ||
4511 | case NUMBER: | |
4512 | if (*p < '0' || *p > '9') | |
4513 | return; | |
4514 | ||
4515 | break; | |
4516 | ||
4517 | case LETTER: | |
4518 | if (!(*p >= 'A' && *p <= 'Z') && | |
4519 | !(*p >= 'a' && *p <= 'z')) | |
4520 | return; | |
4521 | ||
4522 | break; | |
4523 | ||
4524 | case COLON: | |
4525 | if (*p != ':') | |
4526 | return; | |
4527 | break; | |
4528 | ||
4529 | } | |
4530 | } | |
4531 | ||
4532 | *buf = p; | |
4533 | } | |
4534 | ||
9beb3f4d LP |
4535 | char* strshorten(char *s, size_t l) { |
4536 | assert(s); | |
4537 | ||
4538 | if (l < strlen(s)) | |
4539 | s[l] = 0; | |
4540 | ||
4541 | return s; | |
4542 | } | |
4543 | ||
4544 | static bool hostname_valid_char(char c) { | |
4545 | return | |
4546 | (c >= 'a' && c <= 'z') || | |
4547 | (c >= 'A' && c <= 'Z') || | |
4548 | (c >= '0' && c <= '9') || | |
4549 | c == '-' || | |
4550 | c == '_' || | |
4551 | c == '.'; | |
4552 | } | |
4553 | ||
4554 | bool hostname_is_valid(const char *s) { | |
4555 | const char *p; | |
4556 | ||
4557 | if (isempty(s)) | |
4558 | return false; | |
4559 | ||
4560 | for (p = s; *p; p++) | |
4561 | if (!hostname_valid_char(*p)) | |
4562 | return false; | |
4563 | ||
4564 | if (p-s > HOST_NAME_MAX) | |
4565 | return false; | |
4566 | ||
4567 | return true; | |
4568 | } | |
4569 | ||
4570 | char* hostname_cleanup(char *s) { | |
4571 | char *p, *d; | |
4572 | ||
4573 | for (p = s, d = s; *p; p++) | |
4574 | if ((*p >= 'a' && *p <= 'z') || | |
4575 | (*p >= 'A' && *p <= 'Z') || | |
4576 | (*p >= '0' && *p <= '9') || | |
4577 | *p == '-' || | |
4578 | *p == '_' || | |
4579 | *p == '.') | |
4580 | *(d++) = *p; | |
4581 | ||
4582 | *d = 0; | |
4583 | ||
4584 | strshorten(s, HOST_NAME_MAX); | |
4585 | return s; | |
4586 | } | |
4587 | ||
1325aa42 LP |
4588 | int pipe_eof(int fd) { |
4589 | struct pollfd pollfd; | |
4590 | int r; | |
4591 | ||
4592 | zero(pollfd); | |
4593 | pollfd.fd = fd; | |
4594 | pollfd.events = POLLIN|POLLHUP; | |
4595 | ||
4596 | r = poll(&pollfd, 1, 0); | |
4597 | if (r < 0) | |
4598 | return -errno; | |
4599 | ||
4600 | if (r == 0) | |
4601 | return 0; | |
4602 | ||
4603 | return pollfd.revents & POLLHUP; | |
4604 | } | |
4605 | ||
8f2d43a0 | 4606 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b LP |
4607 | struct pollfd pollfd; |
4608 | int r; | |
4609 | ||
4610 | zero(pollfd); | |
4611 | pollfd.fd = fd; | |
4612 | pollfd.events = event; | |
4613 | ||
8f2d43a0 | 4614 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
4615 | if (r < 0) |
4616 | return -errno; | |
4617 | ||
4618 | if (r == 0) | |
4619 | return 0; | |
4620 | ||
4621 | return pollfd.revents; | |
4622 | } | |
4623 | ||
5a3ab509 LP |
4624 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4625 | FILE *f; | |
4626 | char *t; | |
4627 | const char *fn; | |
4628 | size_t k; | |
4629 | int fd; | |
4630 | ||
4631 | assert(path); | |
4632 | assert(_f); | |
4633 | assert(_temp_path); | |
4634 | ||
4635 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4636 | if (!t) | |
4637 | return -ENOMEM; | |
4638 | ||
9eb977db | 4639 | fn = path_get_file_name(path); |
5a3ab509 LP |
4640 | k = fn-path; |
4641 | memcpy(t, path, k); | |
4642 | t[k] = '.'; | |
4643 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4644 | ||
4645 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4646 | if (fd < 0) { | |
4647 | free(t); | |
4648 | return -errno; | |
4649 | } | |
4650 | ||
4651 | f = fdopen(fd, "we"); | |
4652 | if (!f) { | |
4653 | unlink(t); | |
4654 | free(t); | |
4655 | return -errno; | |
4656 | } | |
4657 | ||
4658 | *_f = f; | |
4659 | *_temp_path = t; | |
4660 | ||
4661 | return 0; | |
4662 | } | |
4663 | ||
6ea832a2 | 4664 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4665 | assert(fd >= 0); |
4666 | ||
6ea832a2 LP |
4667 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4668 | return -errno; | |
4669 | ||
4670 | return 0; | |
4671 | } | |
4672 | ||
4673 | int terminal_vhangup(const char *name) { | |
4674 | int fd, r; | |
4675 | ||
4676 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4677 | if (fd < 0) | |
4678 | return fd; | |
4679 | ||
4680 | r = terminal_vhangup_fd(fd); | |
4681 | close_nointr_nofail(fd); | |
4682 | ||
4683 | return r; | |
4684 | } | |
4685 | ||
4686 | int vt_disallocate(const char *name) { | |
4687 | int fd, r; | |
4688 | unsigned u; | |
6ea832a2 LP |
4689 | |
4690 | /* Deallocate the VT if possible. If not possible | |
4691 | * (i.e. because it is the active one), at least clear it | |
4692 | * entirely (including the scrollback buffer) */ | |
4693 | ||
b83bc4e9 LP |
4694 | if (!startswith(name, "/dev/")) |
4695 | return -EINVAL; | |
4696 | ||
4697 | if (!tty_is_vc(name)) { | |
4698 | /* So this is not a VT. I guess we cannot deallocate | |
4699 | * it then. But let's at least clear the screen */ | |
4700 | ||
4701 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4702 | if (fd < 0) | |
4703 | return fd; | |
4704 | ||
8585357a LP |
4705 | loop_write(fd, |
4706 | "\033[r" /* clear scrolling region */ | |
4707 | "\033[H" /* move home */ | |
4708 | "\033[2J", /* clear screen */ | |
4709 | 10, false); | |
b83bc4e9 LP |
4710 | close_nointr_nofail(fd); |
4711 | ||
4712 | return 0; | |
4713 | } | |
6ea832a2 LP |
4714 | |
4715 | if (!startswith(name, "/dev/tty")) | |
4716 | return -EINVAL; | |
4717 | ||
4718 | r = safe_atou(name+8, &u); | |
4719 | if (r < 0) | |
4720 | return r; | |
4721 | ||
4722 | if (u <= 0) | |
b83bc4e9 | 4723 | return -EINVAL; |
6ea832a2 | 4724 | |
b83bc4e9 | 4725 | /* Try to deallocate */ |
6ea832a2 LP |
4726 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4727 | if (fd < 0) | |
4728 | return fd; | |
4729 | ||
4730 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4731 | close_nointr_nofail(fd); |
6ea832a2 | 4732 | |
b83bc4e9 LP |
4733 | if (r >= 0) |
4734 | return 0; | |
6ea832a2 | 4735 | |
b83bc4e9 | 4736 | if (errno != EBUSY) |
6ea832a2 | 4737 | return -errno; |
6ea832a2 | 4738 | |
b83bc4e9 LP |
4739 | /* Couldn't deallocate, so let's clear it fully with |
4740 | * scrollback */ | |
4741 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4742 | if (fd < 0) |
b83bc4e9 | 4743 | return fd; |
6ea832a2 | 4744 | |
8585357a LP |
4745 | loop_write(fd, |
4746 | "\033[r" /* clear scrolling region */ | |
4747 | "\033[H" /* move home */ | |
4748 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4749 | 10, false); | |
b83bc4e9 | 4750 | close_nointr_nofail(fd); |
6ea832a2 | 4751 | |
b83bc4e9 | 4752 | return 0; |
6ea832a2 LP |
4753 | } |
4754 | ||
34ca941c LP |
4755 | int copy_file(const char *from, const char *to) { |
4756 | int r, fdf, fdt; | |
4757 | ||
4758 | assert(from); | |
4759 | assert(to); | |
4760 | ||
4761 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4762 | if (fdf < 0) | |
4763 | return -errno; | |
4764 | ||
4765 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
4766 | if (fdt < 0) { | |
4767 | close_nointr_nofail(fdf); | |
4768 | return -errno; | |
4769 | } | |
4770 | ||
4771 | for (;;) { | |
4772 | char buf[PIPE_BUF]; | |
4773 | ssize_t n, k; | |
4774 | ||
4775 | n = read(fdf, buf, sizeof(buf)); | |
4776 | if (n < 0) { | |
4777 | r = -errno; | |
4778 | ||
4779 | close_nointr_nofail(fdf); | |
4780 | close_nointr(fdt); | |
4781 | unlink(to); | |
4782 | ||
4783 | return r; | |
4784 | } | |
4785 | ||
4786 | if (n == 0) | |
4787 | break; | |
4788 | ||
4789 | errno = 0; | |
4790 | k = loop_write(fdt, buf, n, false); | |
4791 | if (n != k) { | |
4792 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4793 | ||
4794 | close_nointr_nofail(fdf); | |
4795 | close_nointr(fdt); | |
4796 | ||
4797 | unlink(to); | |
4798 | return r; | |
4799 | } | |
4800 | } | |
4801 | ||
4802 | close_nointr_nofail(fdf); | |
4803 | r = close_nointr(fdt); | |
4804 | ||
4805 | if (r < 0) { | |
4806 | unlink(to); | |
4807 | return r; | |
4808 | } | |
4809 | ||
4810 | return 0; | |
4811 | } | |
4812 | ||
4813 | int symlink_or_copy(const char *from, const char *to) { | |
4814 | char *pf = NULL, *pt = NULL; | |
4815 | struct stat a, b; | |
4816 | int r; | |
4817 | ||
4818 | assert(from); | |
4819 | assert(to); | |
4820 | ||
9eb977db KS |
4821 | if (path_get_parent(from, &pf) < 0 || |
4822 | path_get_parent(to, &pt) < 0) { | |
34ca941c LP |
4823 | r = -ENOMEM; |
4824 | goto finish; | |
4825 | } | |
4826 | ||
4827 | if (stat(pf, &a) < 0 || | |
4828 | stat(pt, &b) < 0) { | |
4829 | r = -errno; | |
4830 | goto finish; | |
4831 | } | |
4832 | ||
4833 | if (a.st_dev != b.st_dev) { | |
4834 | free(pf); | |
4835 | free(pt); | |
4836 | ||
4837 | return copy_file(from, to); | |
4838 | } | |
4839 | ||
4840 | if (symlink(from, to) < 0) { | |
4841 | r = -errno; | |
4842 | goto finish; | |
4843 | } | |
4844 | ||
4845 | r = 0; | |
4846 | ||
4847 | finish: | |
4848 | free(pf); | |
4849 | free(pt); | |
4850 | ||
4851 | return r; | |
4852 | } | |
4853 | ||
4854 | int symlink_or_copy_atomic(const char *from, const char *to) { | |
4855 | char *t, *x; | |
4856 | const char *fn; | |
4857 | size_t k; | |
4858 | unsigned long long ull; | |
4859 | unsigned i; | |
4860 | int r; | |
4861 | ||
4862 | assert(from); | |
4863 | assert(to); | |
4864 | ||
4865 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4866 | if (!t) | |
4867 | return -ENOMEM; | |
4868 | ||
9eb977db | 4869 | fn = path_get_file_name(to); |
34ca941c LP |
4870 | k = fn-to; |
4871 | memcpy(t, to, k); | |
4872 | t[k] = '.'; | |
4873 | x = stpcpy(t+k+1, fn); | |
4874 | ||
4875 | ull = random_ull(); | |
4876 | for (i = 0; i < 16; i++) { | |
4877 | *(x++) = hexchar(ull & 0xF); | |
4878 | ull >>= 4; | |
4879 | } | |
4880 | ||
4881 | *x = 0; | |
4882 | ||
4883 | r = symlink_or_copy(from, t); | |
4884 | if (r < 0) { | |
4885 | unlink(t); | |
4886 | free(t); | |
4887 | return r; | |
4888 | } | |
4889 | ||
4890 | if (rename(t, to) < 0) { | |
4891 | r = -errno; | |
4892 | unlink(t); | |
4893 | free(t); | |
4894 | return r; | |
4895 | } | |
4896 | ||
4897 | free(t); | |
4898 | return r; | |
4899 | } | |
4900 | ||
4d6d6518 LP |
4901 | bool display_is_local(const char *display) { |
4902 | assert(display); | |
4903 | ||
4904 | return | |
4905 | display[0] == ':' && | |
4906 | display[1] >= '0' && | |
4907 | display[1] <= '9'; | |
4908 | } | |
4909 | ||
4910 | int socket_from_display(const char *display, char **path) { | |
4911 | size_t k; | |
4912 | char *f, *c; | |
4913 | ||
4914 | assert(display); | |
4915 | assert(path); | |
4916 | ||
4917 | if (!display_is_local(display)) | |
4918 | return -EINVAL; | |
4919 | ||
4920 | k = strspn(display+1, "0123456789"); | |
4921 | ||
4922 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4923 | if (!f) | |
4924 | return -ENOMEM; | |
4925 | ||
4926 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4927 | memcpy(c, display+1, k); | |
4928 | c[k] = 0; | |
4929 | ||
4930 | *path = f; | |
4931 | ||
4932 | return 0; | |
4933 | } | |
4934 | ||
d05c5031 LP |
4935 | int get_user_creds( |
4936 | const char **username, | |
4937 | uid_t *uid, gid_t *gid, | |
4938 | const char **home, | |
4939 | const char **shell) { | |
4940 | ||
1cccf435 | 4941 | struct passwd *p; |
ddd88763 | 4942 | uid_t u; |
1cccf435 MV |
4943 | |
4944 | assert(username); | |
4945 | assert(*username); | |
1cccf435 MV |
4946 | |
4947 | /* We enforce some special rules for uid=0: in order to avoid | |
4948 | * NSS lookups for root we hardcode its data. */ | |
4949 | ||
4950 | if (streq(*username, "root") || streq(*username, "0")) { | |
4951 | *username = "root"; | |
4b67834e LP |
4952 | |
4953 | if (uid) | |
4954 | *uid = 0; | |
4955 | ||
4956 | if (gid) | |
4957 | *gid = 0; | |
4958 | ||
4959 | if (home) | |
4960 | *home = "/root"; | |
d05c5031 LP |
4961 | |
4962 | if (shell) | |
4963 | *shell = "/bin/sh"; | |
4964 | ||
1cccf435 MV |
4965 | return 0; |
4966 | } | |
4967 | ||
ddd88763 | 4968 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4969 | errno = 0; |
ddd88763 | 4970 | p = getpwuid(u); |
1cccf435 MV |
4971 | |
4972 | /* If there are multiple users with the same id, make | |
4973 | * sure to leave $USER to the configured value instead | |
4974 | * of the first occurrence in the database. However if | |
4975 | * the uid was configured by a numeric uid, then let's | |
4976 | * pick the real username from /etc/passwd. */ | |
4977 | if (p) | |
4978 | *username = p->pw_name; | |
4979 | } else { | |
4980 | errno = 0; | |
4981 | p = getpwnam(*username); | |
4982 | } | |
4983 | ||
4984 | if (!p) | |
4985 | return errno != 0 ? -errno : -ESRCH; | |
4986 | ||
4b67834e LP |
4987 | if (uid) |
4988 | *uid = p->pw_uid; | |
4989 | ||
4990 | if (gid) | |
4991 | *gid = p->pw_gid; | |
4992 | ||
4993 | if (home) | |
4994 | *home = p->pw_dir; | |
4995 | ||
d05c5031 LP |
4996 | if (shell) |
4997 | *shell = p->pw_shell; | |
4998 | ||
4b67834e LP |
4999 | return 0; |
5000 | } | |
5001 | ||
5002 | int get_group_creds(const char **groupname, gid_t *gid) { | |
5003 | struct group *g; | |
5004 | gid_t id; | |
5005 | ||
5006 | assert(groupname); | |
5007 | ||
5008 | /* We enforce some special rules for gid=0: in order to avoid | |
5009 | * NSS lookups for root we hardcode its data. */ | |
5010 | ||
5011 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
5012 | *groupname = "root"; | |
5013 | ||
5014 | if (gid) | |
5015 | *gid = 0; | |
5016 | ||
5017 | return 0; | |
5018 | } | |
5019 | ||
5020 | if (parse_gid(*groupname, &id) >= 0) { | |
5021 | errno = 0; | |
5022 | g = getgrgid(id); | |
5023 | ||
5024 | if (g) | |
5025 | *groupname = g->gr_name; | |
5026 | } else { | |
5027 | errno = 0; | |
5028 | g = getgrnam(*groupname); | |
5029 | } | |
5030 | ||
5031 | if (!g) | |
5032 | return errno != 0 ? -errno : -ESRCH; | |
5033 | ||
5034 | if (gid) | |
5035 | *gid = g->gr_gid; | |
5036 | ||
1cccf435 MV |
5037 | return 0; |
5038 | } | |
5039 | ||
43673799 LP |
5040 | int in_group(const char *name) { |
5041 | gid_t gid, *gids; | |
5042 | int ngroups_max, r, i; | |
5043 | ||
5044 | r = get_group_creds(&name, &gid); | |
5045 | if (r < 0) | |
5046 | return r; | |
5047 | ||
5048 | if (getgid() == gid) | |
5049 | return 1; | |
5050 | ||
5051 | if (getegid() == gid) | |
5052 | return 1; | |
5053 | ||
5054 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
5055 | assert(ngroups_max > 0); | |
5056 | ||
5057 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
5058 | ||
5059 | r = getgroups(ngroups_max, gids); | |
5060 | if (r < 0) | |
5061 | return -errno; | |
5062 | ||
5063 | for (i = 0; i < r; i++) | |
5064 | if (gids[i] == gid) | |
5065 | return 1; | |
5066 | ||
5067 | return 0; | |
5068 | } | |
5069 | ||
8092a428 LP |
5070 | int glob_exists(const char *path) { |
5071 | glob_t g; | |
5072 | int r, k; | |
5073 | ||
5074 | assert(path); | |
5075 | ||
5076 | zero(g); | |
5077 | errno = 0; | |
5078 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
5079 | ||
5080 | if (k == GLOB_NOMATCH) | |
5081 | r = 0; | |
5082 | else if (k == GLOB_NOSPACE) | |
5083 | r = -ENOMEM; | |
5084 | else if (k == 0) | |
5085 | r = !strv_isempty(g.gl_pathv); | |
5086 | else | |
5087 | r = errno ? -errno : -EIO; | |
5088 | ||
5089 | globfree(&g); | |
5090 | ||
5091 | return r; | |
5092 | } | |
5093 | ||
83096483 LP |
5094 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
5095 | struct stat st; | |
5096 | ||
5097 | assert(d); | |
5098 | assert(de); | |
5099 | ||
5100 | if (de->d_type != DT_UNKNOWN) | |
5101 | return 0; | |
5102 | ||
5103 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
5104 | return -errno; | |
5105 | ||
5106 | de->d_type = | |
5107 | S_ISREG(st.st_mode) ? DT_REG : | |
5108 | S_ISDIR(st.st_mode) ? DT_DIR : | |
5109 | S_ISLNK(st.st_mode) ? DT_LNK : | |
5110 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
5111 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
5112 | S_ISCHR(st.st_mode) ? DT_CHR : | |
5113 | S_ISBLK(st.st_mode) ? DT_BLK : | |
5114 | DT_UNKNOWN; | |
5115 | ||
5116 | return 0; | |
5117 | } | |
5118 | ||
5119 | int in_search_path(const char *path, char **search) { | |
5120 | char **i, *parent; | |
5121 | int r; | |
5122 | ||
9eb977db | 5123 | r = path_get_parent(path, &parent); |
83096483 LP |
5124 | if (r < 0) |
5125 | return r; | |
5126 | ||
5127 | r = 0; | |
5128 | ||
5129 | STRV_FOREACH(i, search) { | |
5130 | if (path_equal(parent, *i)) { | |
5131 | r = 1; | |
5132 | break; | |
5133 | } | |
5134 | } | |
5135 | ||
5136 | free(parent); | |
5137 | ||
5138 | return r; | |
5139 | } | |
5140 | ||
034a2a52 LP |
5141 | int get_files_in_directory(const char *path, char ***list) { |
5142 | DIR *d; | |
5143 | int r = 0; | |
5144 | unsigned n = 0; | |
5145 | char **l = NULL; | |
5146 | ||
5147 | assert(path); | |
d60ef526 LP |
5148 | |
5149 | /* Returns all files in a directory in *list, and the number | |
5150 | * of files as return value. If list is NULL returns only the | |
5151 | * number */ | |
034a2a52 LP |
5152 | |
5153 | d = opendir(path); | |
8ea913b2 LP |
5154 | if (!d) |
5155 | return -errno; | |
5156 | ||
034a2a52 LP |
5157 | for (;;) { |
5158 | struct dirent buffer, *de; | |
5159 | int k; | |
5160 | ||
5161 | k = readdir_r(d, &buffer, &de); | |
5162 | if (k != 0) { | |
5163 | r = -k; | |
5164 | goto finish; | |
5165 | } | |
5166 | ||
5167 | if (!de) | |
5168 | break; | |
5169 | ||
5170 | dirent_ensure_type(d, de); | |
5171 | ||
5172 | if (!dirent_is_file(de)) | |
5173 | continue; | |
5174 | ||
d60ef526 LP |
5175 | if (list) { |
5176 | if ((unsigned) r >= n) { | |
5177 | char **t; | |
034a2a52 | 5178 | |
d60ef526 LP |
5179 | n = MAX(16, 2*r); |
5180 | t = realloc(l, sizeof(char*) * n); | |
5181 | if (!t) { | |
5182 | r = -ENOMEM; | |
5183 | goto finish; | |
5184 | } | |
034a2a52 | 5185 | |
d60ef526 LP |
5186 | l = t; |
5187 | } | |
034a2a52 | 5188 | |
d60ef526 | 5189 | assert((unsigned) r < n); |
034a2a52 | 5190 | |
d60ef526 LP |
5191 | l[r] = strdup(de->d_name); |
5192 | if (!l[r]) { | |
5193 | r = -ENOMEM; | |
5194 | goto finish; | |
5195 | } | |
034a2a52 | 5196 | |
d60ef526 LP |
5197 | l[++r] = NULL; |
5198 | } else | |
5199 | r++; | |
034a2a52 LP |
5200 | } |
5201 | ||
5202 | finish: | |
5203 | if (d) | |
5204 | closedir(d); | |
5205 | ||
d60ef526 LP |
5206 | if (r >= 0) { |
5207 | if (list) | |
5208 | *list = l; | |
5209 | } else | |
034a2a52 LP |
5210 | strv_free(l); |
5211 | ||
5212 | return r; | |
5213 | } | |
5214 | ||
b7def684 | 5215 | char *strjoin(const char *x, ...) { |
911a4828 LP |
5216 | va_list ap; |
5217 | size_t l; | |
5218 | char *r, *p; | |
5219 | ||
5220 | va_start(ap, x); | |
5221 | ||
5222 | if (x) { | |
5223 | l = strlen(x); | |
5224 | ||
5225 | for (;;) { | |
5226 | const char *t; | |
5227 | ||
5228 | t = va_arg(ap, const char *); | |
5229 | if (!t) | |
5230 | break; | |
5231 | ||
5232 | l += strlen(t); | |
5233 | } | |
5234 | } else | |
5235 | l = 0; | |
5236 | ||
5237 | va_end(ap); | |
5238 | ||
5239 | r = new(char, l+1); | |
5240 | if (!r) | |
5241 | return NULL; | |
5242 | ||
5243 | if (x) { | |
5244 | p = stpcpy(r, x); | |
5245 | ||
5246 | va_start(ap, x); | |
5247 | ||
5248 | for (;;) { | |
5249 | const char *t; | |
5250 | ||
5251 | t = va_arg(ap, const char *); | |
5252 | if (!t) | |
5253 | break; | |
5254 | ||
5255 | p = stpcpy(p, t); | |
5256 | } | |
8ea913b2 LP |
5257 | |
5258 | va_end(ap); | |
911a4828 LP |
5259 | } else |
5260 | r[0] = 0; | |
5261 | ||
5262 | return r; | |
5263 | } | |
5264 | ||
b636465b LP |
5265 | bool is_main_thread(void) { |
5266 | static __thread int cached = 0; | |
5267 | ||
5268 | if (_unlikely_(cached == 0)) | |
5269 | cached = getpid() == gettid() ? 1 : -1; | |
5270 | ||
5271 | return cached > 0; | |
5272 | } | |
5273 | ||
94959f0f LP |
5274 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
5275 | char *p, *s; | |
5276 | int r; | |
5277 | unsigned n, m; | |
5278 | ||
5279 | assert(ret); | |
5280 | ||
5281 | /* If it has a queue this is good enough for us */ | |
5282 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
5283 | return -ENOMEM; | |
5284 | ||
5285 | r = access(p, F_OK); | |
5286 | free(p); | |
5287 | ||
5288 | if (r >= 0) { | |
5289 | *ret = d; | |
5290 | return 0; | |
5291 | } | |
5292 | ||
5293 | /* If it is a partition find the originating device */ | |
5294 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
5295 | return -ENOMEM; | |
5296 | ||
5297 | r = access(p, F_OK); | |
5298 | free(p); | |
5299 | ||
5300 | if (r < 0) | |
5301 | return -ENOENT; | |
5302 | ||
5303 | /* Get parent dev_t */ | |
5304 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
5305 | return -ENOMEM; | |
5306 | ||
5307 | r = read_one_line_file(p, &s); | |
5308 | free(p); | |
5309 | ||
5310 | if (r < 0) | |
5311 | return r; | |
5312 | ||
5313 | r = sscanf(s, "%u:%u", &m, &n); | |
5314 | free(s); | |
5315 | ||
5316 | if (r != 2) | |
5317 | return -EINVAL; | |
5318 | ||
5319 | /* Only return this if it is really good enough for us. */ | |
5320 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
5321 | return -ENOMEM; | |
5322 | ||
5323 | r = access(p, F_OK); | |
5324 | free(p); | |
5325 | ||
5326 | if (r >= 0) { | |
5327 | *ret = makedev(m, n); | |
5328 | return 0; | |
5329 | } | |
5330 | ||
5331 | return -ENOENT; | |
5332 | } | |
5333 | ||
8d53b453 | 5334 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
5335 | struct stat st; |
5336 | ||
5337 | assert(p); | |
5338 | ||
5339 | if (lstat(p, &st) < 0) | |
5340 | return -errno; | |
5341 | ||
5342 | return | |
8d53b453 | 5343 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
5344 | (st.st_mode & S_ISVTX); |
5345 | } | |
94959f0f | 5346 | |
f41607a6 LP |
5347 | static const char *const ioprio_class_table[] = { |
5348 | [IOPRIO_CLASS_NONE] = "none", | |
5349 | [IOPRIO_CLASS_RT] = "realtime", | |
5350 | [IOPRIO_CLASS_BE] = "best-effort", | |
5351 | [IOPRIO_CLASS_IDLE] = "idle" | |
5352 | }; | |
5353 | ||
5354 | DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int); | |
5355 | ||
5356 | static const char *const sigchld_code_table[] = { | |
5357 | [CLD_EXITED] = "exited", | |
5358 | [CLD_KILLED] = "killed", | |
5359 | [CLD_DUMPED] = "dumped", | |
5360 | [CLD_TRAPPED] = "trapped", | |
5361 | [CLD_STOPPED] = "stopped", | |
5362 | [CLD_CONTINUED] = "continued", | |
5363 | }; | |
5364 | ||
5365 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
5366 | ||
5367 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
5368 | [LOG_FAC(LOG_KERN)] = "kern", | |
5369 | [LOG_FAC(LOG_USER)] = "user", | |
5370 | [LOG_FAC(LOG_MAIL)] = "mail", | |
5371 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
5372 | [LOG_FAC(LOG_AUTH)] = "auth", | |
5373 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
5374 | [LOG_FAC(LOG_LPR)] = "lpr", | |
5375 | [LOG_FAC(LOG_NEWS)] = "news", | |
5376 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
5377 | [LOG_FAC(LOG_CRON)] = "cron", | |
5378 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
5379 | [LOG_FAC(LOG_FTP)] = "ftp", | |
5380 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
5381 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
5382 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
5383 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
5384 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
5385 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
5386 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
5387 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
5388 | }; | |
5389 | ||
5390 | DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int); | |
5391 | ||
5392 | static const char *const log_level_table[] = { | |
5393 | [LOG_EMERG] = "emerg", | |
5394 | [LOG_ALERT] = "alert", | |
5395 | [LOG_CRIT] = "crit", | |
5396 | [LOG_ERR] = "err", | |
5397 | [LOG_WARNING] = "warning", | |
5398 | [LOG_NOTICE] = "notice", | |
5399 | [LOG_INFO] = "info", | |
5400 | [LOG_DEBUG] = "debug" | |
5401 | }; | |
5402 | ||
5403 | DEFINE_STRING_TABLE_LOOKUP(log_level, int); | |
5404 | ||
5405 | static const char* const sched_policy_table[] = { | |
5406 | [SCHED_OTHER] = "other", | |
5407 | [SCHED_BATCH] = "batch", | |
5408 | [SCHED_IDLE] = "idle", | |
5409 | [SCHED_FIFO] = "fifo", | |
5410 | [SCHED_RR] = "rr" | |
5411 | }; | |
5412 | ||
5413 | DEFINE_STRING_TABLE_LOOKUP(sched_policy, int); | |
5414 | ||
5415 | static const char* const rlimit_table[] = { | |
5416 | [RLIMIT_CPU] = "LimitCPU", | |
5417 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
5418 | [RLIMIT_DATA] = "LimitDATA", | |
5419 | [RLIMIT_STACK] = "LimitSTACK", | |
5420 | [RLIMIT_CORE] = "LimitCORE", | |
5421 | [RLIMIT_RSS] = "LimitRSS", | |
5422 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
5423 | [RLIMIT_AS] = "LimitAS", | |
5424 | [RLIMIT_NPROC] = "LimitNPROC", | |
5425 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
5426 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
5427 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
5428 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
5429 | [RLIMIT_NICE] = "LimitNICE", | |
5430 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
5431 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
5432 | }; | |
5433 | ||
5434 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
5435 | ||
5436 | static const char* const ip_tos_table[] = { | |
5437 | [IPTOS_LOWDELAY] = "low-delay", | |
5438 | [IPTOS_THROUGHPUT] = "throughput", | |
5439 | [IPTOS_RELIABILITY] = "reliability", | |
5440 | [IPTOS_LOWCOST] = "low-cost", | |
5441 | }; | |
5442 | ||
5443 | DEFINE_STRING_TABLE_LOOKUP(ip_tos, int); | |
5444 | ||
4e240ab0 | 5445 | static const char *const __signal_table[] = { |
f41607a6 LP |
5446 | [SIGHUP] = "HUP", |
5447 | [SIGINT] = "INT", | |
5448 | [SIGQUIT] = "QUIT", | |
5449 | [SIGILL] = "ILL", | |
5450 | [SIGTRAP] = "TRAP", | |
5451 | [SIGABRT] = "ABRT", | |
5452 | [SIGBUS] = "BUS", | |
5453 | [SIGFPE] = "FPE", | |
5454 | [SIGKILL] = "KILL", | |
5455 | [SIGUSR1] = "USR1", | |
5456 | [SIGSEGV] = "SEGV", | |
5457 | [SIGUSR2] = "USR2", | |
5458 | [SIGPIPE] = "PIPE", | |
5459 | [SIGALRM] = "ALRM", | |
5460 | [SIGTERM] = "TERM", | |
5461 | #ifdef SIGSTKFLT | |
5462 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
5463 | #endif | |
5464 | [SIGCHLD] = "CHLD", | |
5465 | [SIGCONT] = "CONT", | |
5466 | [SIGSTOP] = "STOP", | |
5467 | [SIGTSTP] = "TSTP", | |
5468 | [SIGTTIN] = "TTIN", | |
5469 | [SIGTTOU] = "TTOU", | |
5470 | [SIGURG] = "URG", | |
5471 | [SIGXCPU] = "XCPU", | |
5472 | [SIGXFSZ] = "XFSZ", | |
5473 | [SIGVTALRM] = "VTALRM", | |
5474 | [SIGPROF] = "PROF", | |
5475 | [SIGWINCH] = "WINCH", | |
5476 | [SIGIO] = "IO", | |
5477 | [SIGPWR] = "PWR", | |
5478 | [SIGSYS] = "SYS" | |
5479 | }; | |
5480 | ||
4e240ab0 MS |
5481 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
5482 | ||
5483 | const char *signal_to_string(int signo) { | |
5484 | static __thread char buf[12]; | |
5485 | const char *name; | |
5486 | ||
5487 | name = __signal_to_string(signo); | |
5488 | if (name) | |
5489 | return name; | |
5490 | ||
5491 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
5492 | snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN); | |
5493 | else | |
5494 | snprintf(buf, sizeof(buf) - 1, "%d", signo); | |
5495 | char_array_0(buf); | |
5496 | return buf; | |
5497 | } | |
5498 | ||
5499 | int signal_from_string(const char *s) { | |
5500 | int signo; | |
5501 | int offset = 0; | |
5502 | unsigned u; | |
5503 | ||
5504 | signo =__signal_from_string(s); | |
5505 | if (signo > 0) | |
5506 | return signo; | |
5507 | ||
5508 | if (startswith(s, "RTMIN+")) { | |
5509 | s += 6; | |
5510 | offset = SIGRTMIN; | |
5511 | } | |
5512 | if (safe_atou(s, &u) >= 0) { | |
5513 | signo = (int) u + offset; | |
5514 | if (signo > 0 && signo < _NSIG) | |
5515 | return signo; | |
5516 | } | |
5517 | return -1; | |
5518 | } | |
65457142 FC |
5519 | |
5520 | bool kexec_loaded(void) { | |
5521 | bool loaded = false; | |
5522 | char *s; | |
5523 | ||
5524 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
5525 | if (s[0] == '1') | |
5526 | loaded = true; | |
5527 | free(s); | |
5528 | } | |
5529 | return loaded; | |
5530 | } | |
fb9de93d LP |
5531 | |
5532 | int strdup_or_null(const char *a, char **b) { | |
5533 | char *c; | |
5534 | ||
5535 | assert(b); | |
5536 | ||
5537 | if (!a) { | |
5538 | *b = NULL; | |
5539 | return 0; | |
5540 | } | |
5541 | ||
5542 | c = strdup(a); | |
5543 | if (!c) | |
5544 | return -ENOMEM; | |
5545 | ||
5546 | *b = c; | |
5547 | return 0; | |
5548 | } | |
64685e0c | 5549 | |
87d2c1ff LP |
5550 | int prot_from_flags(int flags) { |
5551 | ||
5552 | switch (flags & O_ACCMODE) { | |
5553 | ||
5554 | case O_RDONLY: | |
5555 | return PROT_READ; | |
5556 | ||
5557 | case O_WRONLY: | |
5558 | return PROT_WRITE; | |
5559 | ||
5560 | case O_RDWR: | |
5561 | return PROT_READ|PROT_WRITE; | |
5562 | ||
5563 | default: | |
5564 | return -EINVAL; | |
5565 | } | |
7c99e0c1 | 5566 | } |
689b9a22 | 5567 | |
babfc091 | 5568 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 5569 | unsigned i; |
babfc091 LP |
5570 | |
5571 | static const struct { | |
5572 | const char *suffix; | |
5573 | off_t factor; | |
5574 | } table[] = { | |
32895bb3 LP |
5575 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
5576 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
5577 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
5578 | { "G", 1024ULL*1024ULL*1024ULL }, | |
5579 | { "M", 1024ULL*1024ULL }, | |
5580 | { "K", 1024ULL }, | |
5581 | }; | |
5582 | ||
5583 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
5584 | ||
5585 | if (t >= table[i].factor) { | |
5586 | snprintf(buf, l, | |
5587 | "%llu.%llu%s", | |
5588 | (unsigned long long) (t / table[i].factor), | |
5589 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
5590 | table[i].suffix); | |
5591 | ||
5592 | goto finish; | |
5593 | } | |
5594 | } | |
5595 | ||
5596 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
5597 | ||
5598 | finish: | |
5599 | buf[l-1] = 0; | |
5600 | return buf; | |
5601 | ||
5602 | } | |
55d7bfc1 LP |
5603 | |
5604 | void* memdup(const void *p, size_t l) { | |
5605 | void *r; | |
5606 | ||
5607 | assert(p); | |
5608 | ||
5609 | r = malloc(l); | |
5610 | if (!r) | |
5611 | return NULL; | |
5612 | ||
5613 | memcpy(r, p, l); | |
5614 | return r; | |
5615 | } | |
bb99a35a LP |
5616 | |
5617 | int fd_inc_sndbuf(int fd, size_t n) { | |
5618 | int r, value; | |
5619 | socklen_t l = sizeof(value); | |
5620 | ||
5621 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
5622 | if (r >= 0 && | |
5623 | l == sizeof(value) && | |
5624 | (size_t) value >= n*2) | |
5625 | return 0; | |
5626 | ||
5627 | value = (int) n; | |
5628 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
5629 | if (r < 0) | |
5630 | return -errno; | |
5631 | ||
5632 | return 1; | |
5633 | } | |
5634 | ||
5635 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5636 | int r, value; | |
5637 | socklen_t l = sizeof(value); | |
5638 | ||
5639 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
5640 | if (r >= 0 && | |
5641 | l == sizeof(value) && | |
5642 | (size_t) value >= n*2) | |
5643 | return 0; | |
5644 | ||
5645 | value = (int) n; | |
5646 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
5647 | if (r < 0) | |
5648 | return -errno; | |
5649 | ||
5650 | return 1; | |
5651 | } | |
6bb92a16 | 5652 | |
9bdc770c | 5653 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
5654 | pid_t parent_pid, agent_pid; |
5655 | int fd; | |
5656 | bool stdout_is_tty, stderr_is_tty; | |
5657 | unsigned n, i; | |
5658 | va_list ap; | |
5659 | char **l; | |
5660 | ||
5661 | assert(pid); | |
5662 | assert(path); | |
5663 | ||
5664 | parent_pid = getpid(); | |
5665 | ||
5666 | /* Spawns a temporary TTY agent, making sure it goes away when | |
5667 | * we go away */ | |
5668 | ||
5669 | agent_pid = fork(); | |
5670 | if (agent_pid < 0) | |
5671 | return -errno; | |
5672 | ||
5673 | if (agent_pid != 0) { | |
5674 | *pid = agent_pid; | |
5675 | return 0; | |
5676 | } | |
5677 | ||
5678 | /* In the child: | |
5679 | * | |
5680 | * Make sure the agent goes away when the parent dies */ | |
5681 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5682 | _exit(EXIT_FAILURE); | |
5683 | ||
5684 | /* Check whether our parent died before we were able | |
5685 | * to set the death signal */ | |
5686 | if (getppid() != parent_pid) | |
5687 | _exit(EXIT_SUCCESS); | |
5688 | ||
5689 | /* Don't leak fds to the agent */ | |
9bdc770c | 5690 | close_all_fds(except, n_except); |
6bb92a16 LP |
5691 | |
5692 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5693 | stderr_is_tty = isatty(STDERR_FILENO); | |
5694 | ||
5695 | if (!stdout_is_tty || !stderr_is_tty) { | |
5696 | /* Detach from stdout/stderr. and reopen | |
5697 | * /dev/tty for them. This is important to | |
5698 | * ensure that when systemctl is started via | |
5699 | * popen() or a similar call that expects to | |
5700 | * read EOF we actually do generate EOF and | |
5701 | * not delay this indefinitely by because we | |
5702 | * keep an unused copy of stdin around. */ | |
5703 | fd = open("/dev/tty", O_WRONLY); | |
5704 | if (fd < 0) { | |
5705 | log_error("Failed to open /dev/tty: %m"); | |
5706 | _exit(EXIT_FAILURE); | |
5707 | } | |
5708 | ||
5709 | if (!stdout_is_tty) | |
5710 | dup2(fd, STDOUT_FILENO); | |
5711 | ||
5712 | if (!stderr_is_tty) | |
5713 | dup2(fd, STDERR_FILENO); | |
5714 | ||
5715 | if (fd > 2) | |
5716 | close(fd); | |
5717 | } | |
5718 | ||
5719 | /* Count arguments */ | |
5720 | va_start(ap, path); | |
5721 | for (n = 0; va_arg(ap, char*); n++) | |
5722 | ; | |
5723 | va_end(ap); | |
5724 | ||
5725 | /* Allocate strv */ | |
5726 | l = alloca(sizeof(char *) * (n + 1)); | |
5727 | ||
5728 | /* Fill in arguments */ | |
5729 | va_start(ap, path); | |
5730 | for (i = 0; i <= n; i++) | |
5731 | l[i] = va_arg(ap, char*); | |
5732 | va_end(ap); | |
5733 | ||
5734 | execv(path, l); | |
5735 | _exit(EXIT_FAILURE); | |
5736 | } | |
68faf98c LP |
5737 | |
5738 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5739 | struct rlimit highest, fixed; | |
5740 | ||
5741 | assert(rlim); | |
5742 | ||
5743 | if (setrlimit(resource, rlim) >= 0) | |
5744 | return 0; | |
5745 | ||
5746 | if (errno != EPERM) | |
5747 | return -errno; | |
5748 | ||
5749 | /* So we failed to set the desired setrlimit, then let's try | |
5750 | * to get as close as we can */ | |
5751 | assert_se(getrlimit(resource, &highest) == 0); | |
5752 | ||
5753 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5754 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5755 | ||
5756 | if (setrlimit(resource, &fixed) < 0) | |
5757 | return -errno; | |
5758 | ||
5759 | return 0; | |
5760 | } | |
3d9a4122 | 5761 | |
ab94af92 LP |
5762 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
5763 | char path[sizeof("/proc/")-1+10+sizeof("/environ")], *value = NULL; | |
5764 | int r; | |
5765 | FILE *f; | |
5766 | bool done = false; | |
5767 | size_t l; | |
5768 | ||
5769 | assert(field); | |
5770 | assert(_value); | |
5771 | ||
5772 | if (pid == 0) | |
5773 | pid = getpid(); | |
5774 | ||
5775 | snprintf(path, sizeof(path), "/proc/%lu/environ", (unsigned long) pid); | |
5776 | char_array_0(path); | |
5777 | ||
5778 | f = fopen(path, "re"); | |
5779 | if (!f) | |
5780 | return -errno; | |
5781 | ||
5782 | l = strlen(field); | |
5783 | r = 0; | |
5784 | ||
5785 | do { | |
5786 | char line[LINE_MAX]; | |
5787 | unsigned i; | |
5788 | ||
5789 | for (i = 0; i < sizeof(line)-1; i++) { | |
5790 | int c; | |
5791 | ||
5792 | c = getc(f); | |
5793 | if (_unlikely_(c == EOF)) { | |
5794 | done = true; | |
5795 | break; | |
5796 | } else if (c == 0) | |
5797 | break; | |
5798 | ||
5799 | line[i] = c; | |
5800 | } | |
5801 | line[i] = 0; | |
5802 | ||
5803 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5804 | value = strdup(line + l + 1); | |
5805 | if (!value) { | |
5806 | r = -ENOMEM; | |
5807 | break; | |
5808 | } | |
5809 | ||
5810 | r = 1; | |
5811 | break; | |
5812 | } | |
5813 | ||
5814 | } while (!done); | |
5815 | ||
5816 | fclose(f); | |
5817 | ||
5818 | if (r >= 0) | |
5819 | *_value = value; | |
5820 | ||
5821 | return r; | |
5822 | } | |
d889a206 LP |
5823 | |
5824 | int can_sleep(const char *type) { | |
5825 | char *p, *w, *state; | |
5826 | size_t l, k; | |
5827 | bool found = false; | |
5828 | int r; | |
5829 | ||
5830 | assert(type); | |
5831 | ||
5832 | r = read_one_line_file("/sys/power/state", &p); | |
5833 | if (r < 0) | |
5834 | return r == -ENOENT ? 0 : r; | |
5835 | ||
5836 | k = strlen(type); | |
5837 | ||
5838 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) { | |
5839 | if (l == k && strncmp(w, type, l) == 0) { | |
5840 | found = true; | |
5841 | break; | |
5842 | } | |
5843 | } | |
5844 | ||
5845 | free(p); | |
5846 | return found; | |
5847 | } | |
49dbfa7b LP |
5848 | |
5849 | bool is_valid_documentation_url(const char *url) { | |
5850 | assert(url); | |
5851 | ||
5852 | if (startswith(url, "http://") && url[7]) | |
5853 | return true; | |
5854 | ||
5855 | if (startswith(url, "https://") && url[8]) | |
5856 | return true; | |
5857 | ||
5858 | if (startswith(url, "file:") && url[5]) | |
5859 | return true; | |
5860 | ||
5861 | if (startswith(url, "info:") && url[5]) | |
5862 | return true; | |
5863 | ||
5864 | if (startswith(url, "man:") && url[4]) | |
5865 | return true; | |
5866 | ||
5867 | return false; | |
5868 | } | |
9be346c9 HH |
5869 | |
5870 | bool in_initrd(void) { | |
8f33b5b8 | 5871 | static int saved = -1; |
825c6fe5 | 5872 | struct statfs s; |
8f33b5b8 | 5873 | |
825c6fe5 LP |
5874 | if (saved >= 0) |
5875 | return saved; | |
5876 | ||
5877 | /* We make two checks here: | |
5878 | * | |
5879 | * 1. the flag file /etc/initrd-release must exist | |
5880 | * 2. the root file system must be a memory file system | |
5881 | * | |
5882 | * The second check is extra paranoia, since misdetecting an | |
5883 | * initrd can have bad bad consequences due the initrd | |
5884 | * emptying when transititioning to the main systemd. | |
5885 | */ | |
5886 | ||
5887 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5888 | statfs("/", &s) >= 0 && | |
5889 | (s.f_type == TMPFS_MAGIC || s.f_type == RAMFS_MAGIC); | |
9be346c9 | 5890 | |
8f33b5b8 | 5891 | return saved; |
9be346c9 | 5892 | } |
069cfc85 LP |
5893 | |
5894 | void warn_melody(void) { | |
5895 | int fd; | |
5896 | ||
5897 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5898 | if (fd < 0) | |
5899 | return; | |
5900 | ||
5901 | /* Yeah, this is synchronous. Kinda sucks. Bute well... */ | |
5902 | ||
5903 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5904 | usleep(125*USEC_PER_MSEC); | |
5905 | ||
5906 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5907 | usleep(125*USEC_PER_MSEC); | |
5908 | ||
5909 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5910 | usleep(125*USEC_PER_MSEC); | |
5911 | ||
5912 | ioctl(fd, KIOCSOUND, 0); | |
5913 | close_nointr_nofail(fd); | |
5914 | } | |
cd3bd60a LP |
5915 | |
5916 | int make_console_stdio(void) { | |
5917 | int fd, r; | |
5918 | ||
5919 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5920 | ||
5921 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5922 | if (fd < 0) { | |
5923 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5924 | return fd; | |
5925 | } | |
5926 | ||
5927 | r = make_stdio(fd); | |
5928 | if (r < 0) { | |
5929 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5930 | return r; | |
5931 | } | |
5932 | ||
5933 | return 0; | |
5934 | } | |
7c5f152a LP |
5935 | |
5936 | int get_home_dir(char **_h) { | |
5937 | char *h; | |
5938 | const char *e; | |
5939 | uid_t u; | |
5940 | struct passwd *p; | |
5941 | ||
5942 | assert(_h); | |
5943 | ||
5944 | /* Take the user specified one */ | |
5945 | e = getenv("HOME"); | |
5946 | if (e) { | |
5947 | h = strdup(e); | |
5948 | if (!h) | |
5949 | return -ENOMEM; | |
5950 | ||
5951 | *_h = h; | |
5952 | return 0; | |
5953 | } | |
5954 | ||
5955 | /* Hardcode home directory for root to avoid NSS */ | |
5956 | u = getuid(); | |
5957 | if (u == 0) { | |
5958 | h = strdup("/root"); | |
5959 | if (!h) | |
5960 | return -ENOMEM; | |
5961 | ||
5962 | *_h = h; | |
5963 | return 0; | |
5964 | } | |
5965 | ||
5966 | /* Check the database... */ | |
5967 | errno = 0; | |
5968 | p = getpwuid(u); | |
5969 | if (!p) | |
5970 | return errno ? -errno : -ENOENT; | |
5971 | ||
5972 | if (!path_is_absolute(p->pw_dir)) | |
5973 | return -EINVAL; | |
5974 | ||
5975 | h = strdup(p->pw_dir); | |
5976 | if (!h) | |
5977 | return -ENOMEM; | |
5978 | ||
5979 | *_h = h; | |
5980 | return 0; | |
5981 | } | |
5982 | ||
5983 | int get_shell(char **_sh) { | |
5984 | char *sh; | |
5985 | const char *e; | |
5986 | uid_t u; | |
5987 | struct passwd *p; | |
5988 | ||
5989 | assert(_sh); | |
5990 | ||
5991 | /* Take the user specified one */ | |
5992 | e = getenv("SHELL"); | |
5993 | if (e) { | |
5994 | sh = strdup(e); | |
5995 | if (!sh) | |
5996 | return -ENOMEM; | |
5997 | ||
5998 | *_sh = sh; | |
5999 | return 0; | |
6000 | } | |
6001 | ||
6002 | /* Hardcode home directory for root to avoid NSS */ | |
6003 | u = getuid(); | |
6004 | if (u == 0) { | |
6005 | sh = strdup("/bin/sh"); | |
6006 | if (!sh) | |
6007 | return -ENOMEM; | |
6008 | ||
6009 | *_sh = sh; | |
6010 | return 0; | |
6011 | } | |
6012 | ||
6013 | /* Check the database... */ | |
6014 | errno = 0; | |
6015 | p = getpwuid(u); | |
6016 | if (!p) | |
6017 | return errno ? -errno : -ESRCH; | |
6018 | ||
6019 | if (!path_is_absolute(p->pw_shell)) | |
6020 | return -EINVAL; | |
6021 | ||
6022 | sh = strdup(p->pw_shell); | |
6023 | if (!sh) | |
6024 | return -ENOMEM; | |
6025 | ||
6026 | *_sh = sh; | |
6027 | return 0; | |
6028 | } |