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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; | |
9086e840 LP |
73 | |
74 | static int parsed_columns = 0; | |
9a0e6896 | 75 | |
37f85e66 | 76 | size_t page_size(void) { |
77 | static __thread size_t pgsz = 0; | |
78 | long r; | |
79 | ||
87d2c1ff | 80 | if (_likely_(pgsz > 0)) |
37f85e66 | 81 | return pgsz; |
82 | ||
e67f47e5 LP |
83 | r = sysconf(_SC_PAGESIZE); |
84 | assert(r > 0); | |
37f85e66 | 85 | |
86 | pgsz = (size_t) r; | |
37f85e66 | 87 | return pgsz; |
88 | } | |
89 | ||
e05797fb LP |
90 | bool streq_ptr(const char *a, const char *b) { |
91 | ||
92 | /* Like streq(), but tries to make sense of NULL pointers */ | |
93 | ||
94 | if (a && b) | |
95 | return streq(a, b); | |
96 | ||
97 | if (!a && !b) | |
98 | return true; | |
99 | ||
100 | return false; | |
101 | } | |
102 | ||
47be870b | 103 | usec_t now(clockid_t clock_id) { |
60918275 LP |
104 | struct timespec ts; |
105 | ||
47be870b | 106 | assert_se(clock_gettime(clock_id, &ts) == 0); |
60918275 LP |
107 | |
108 | return timespec_load(&ts); | |
109 | } | |
110 | ||
63983207 | 111 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { |
871d7de4 LP |
112 | assert(ts); |
113 | ||
114 | ts->realtime = now(CLOCK_REALTIME); | |
115 | ts->monotonic = now(CLOCK_MONOTONIC); | |
116 | ||
117 | return ts; | |
118 | } | |
119 | ||
a185c5aa LP |
120 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) { |
121 | int64_t delta; | |
122 | assert(ts); | |
123 | ||
124 | ts->realtime = u; | |
125 | ||
126 | if (u == 0) | |
127 | ts->monotonic = 0; | |
128 | else { | |
129 | delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; | |
130 | ||
131 | ts->monotonic = now(CLOCK_MONOTONIC); | |
132 | ||
133 | if ((int64_t) ts->monotonic > delta) | |
134 | ts->monotonic -= delta; | |
135 | else | |
136 | ts->monotonic = 0; | |
137 | } | |
138 | ||
139 | return ts; | |
140 | } | |
141 | ||
60918275 LP |
142 | usec_t timespec_load(const struct timespec *ts) { |
143 | assert(ts); | |
144 | ||
145 | return | |
146 | (usec_t) ts->tv_sec * USEC_PER_SEC + | |
147 | (usec_t) ts->tv_nsec / NSEC_PER_USEC; | |
148 | } | |
149 | ||
150 | struct timespec *timespec_store(struct timespec *ts, usec_t u) { | |
151 | assert(ts); | |
152 | ||
153 | ts->tv_sec = (time_t) (u / USEC_PER_SEC); | |
154 | ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); | |
155 | ||
156 | return ts; | |
157 | } | |
158 | ||
159 | usec_t timeval_load(const struct timeval *tv) { | |
160 | assert(tv); | |
161 | ||
162 | return | |
163 | (usec_t) tv->tv_sec * USEC_PER_SEC + | |
164 | (usec_t) tv->tv_usec; | |
165 | } | |
166 | ||
167 | struct timeval *timeval_store(struct timeval *tv, usec_t u) { | |
168 | assert(tv); | |
169 | ||
170 | tv->tv_sec = (time_t) (u / USEC_PER_SEC); | |
171 | tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); | |
172 | ||
173 | return tv; | |
174 | } | |
175 | ||
176 | bool endswith(const char *s, const char *postfix) { | |
177 | size_t sl, pl; | |
178 | ||
179 | assert(s); | |
180 | assert(postfix); | |
181 | ||
182 | sl = strlen(s); | |
183 | pl = strlen(postfix); | |
184 | ||
d4d0d4db LP |
185 | if (pl == 0) |
186 | return true; | |
187 | ||
60918275 LP |
188 | if (sl < pl) |
189 | return false; | |
190 | ||
191 | return memcmp(s + sl - pl, postfix, pl) == 0; | |
192 | } | |
193 | ||
194 | bool startswith(const char *s, const char *prefix) { | |
195 | size_t sl, pl; | |
196 | ||
197 | assert(s); | |
198 | assert(prefix); | |
199 | ||
200 | sl = strlen(s); | |
201 | pl = strlen(prefix); | |
202 | ||
d4d0d4db LP |
203 | if (pl == 0) |
204 | return true; | |
205 | ||
60918275 LP |
206 | if (sl < pl) |
207 | return false; | |
208 | ||
209 | return memcmp(s, prefix, pl) == 0; | |
210 | } | |
211 | ||
3177a7fa MAP |
212 | bool startswith_no_case(const char *s, const char *prefix) { |
213 | size_t sl, pl; | |
214 | unsigned i; | |
215 | ||
216 | assert(s); | |
217 | assert(prefix); | |
218 | ||
219 | sl = strlen(s); | |
220 | pl = strlen(prefix); | |
221 | ||
222 | if (pl == 0) | |
223 | return true; | |
224 | ||
225 | if (sl < pl) | |
226 | return false; | |
227 | ||
e67f47e5 | 228 | for(i = 0; i < pl; ++i) |
3177a7fa MAP |
229 | if (tolower(s[i]) != tolower(prefix[i])) |
230 | return false; | |
3177a7fa MAP |
231 | |
232 | return true; | |
233 | } | |
234 | ||
79d6d816 LP |
235 | bool first_word(const char *s, const char *word) { |
236 | size_t sl, wl; | |
237 | ||
238 | assert(s); | |
239 | assert(word); | |
240 | ||
241 | sl = strlen(s); | |
242 | wl = strlen(word); | |
243 | ||
244 | if (sl < wl) | |
245 | return false; | |
246 | ||
d4d0d4db LP |
247 | if (wl == 0) |
248 | return true; | |
249 | ||
79d6d816 LP |
250 | if (memcmp(s, word, wl) != 0) |
251 | return false; | |
252 | ||
d4d0d4db LP |
253 | return s[wl] == 0 || |
254 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
255 | } |
256 | ||
42f4e3c4 | 257 | int close_nointr(int fd) { |
60918275 LP |
258 | assert(fd >= 0); |
259 | ||
260 | for (;;) { | |
261 | int r; | |
262 | ||
48f82119 LP |
263 | r = close(fd); |
264 | if (r >= 0) | |
60918275 LP |
265 | return r; |
266 | ||
267 | if (errno != EINTR) | |
48f82119 | 268 | return -errno; |
60918275 LP |
269 | } |
270 | } | |
85261803 | 271 | |
85f136b5 | 272 | void close_nointr_nofail(int fd) { |
80876c20 | 273 | int saved_errno = errno; |
85f136b5 LP |
274 | |
275 | /* like close_nointr() but cannot fail, and guarantees errno | |
276 | * is unchanged */ | |
277 | ||
278 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
279 | |
280 | errno = saved_errno; | |
85f136b5 LP |
281 | } |
282 | ||
5b6319dc LP |
283 | void close_many(const int fds[], unsigned n_fd) { |
284 | unsigned i; | |
285 | ||
286 | for (i = 0; i < n_fd; i++) | |
287 | close_nointr_nofail(fds[i]); | |
288 | } | |
289 | ||
85261803 LP |
290 | int parse_boolean(const char *v) { |
291 | assert(v); | |
292 | ||
44d8db9e | 293 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on")) |
85261803 | 294 | return 1; |
44d8db9e | 295 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off")) |
85261803 LP |
296 | return 0; |
297 | ||
298 | return -EINVAL; | |
299 | } | |
300 | ||
3ba686c1 | 301 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 302 | unsigned long ul = 0; |
3ba686c1 LP |
303 | pid_t pid; |
304 | int r; | |
305 | ||
306 | assert(s); | |
307 | assert(ret_pid); | |
308 | ||
e67f47e5 LP |
309 | r = safe_atolu(s, &ul); |
310 | if (r < 0) | |
3ba686c1 LP |
311 | return r; |
312 | ||
313 | pid = (pid_t) ul; | |
314 | ||
315 | if ((unsigned long) pid != ul) | |
316 | return -ERANGE; | |
317 | ||
318 | if (pid <= 0) | |
319 | return -ERANGE; | |
320 | ||
321 | *ret_pid = pid; | |
322 | return 0; | |
323 | } | |
324 | ||
034a2a52 LP |
325 | int parse_uid(const char *s, uid_t* ret_uid) { |
326 | unsigned long ul = 0; | |
327 | uid_t uid; | |
328 | int r; | |
329 | ||
330 | assert(s); | |
331 | assert(ret_uid); | |
332 | ||
e67f47e5 LP |
333 | r = safe_atolu(s, &ul); |
334 | if (r < 0) | |
034a2a52 LP |
335 | return r; |
336 | ||
337 | uid = (uid_t) ul; | |
338 | ||
339 | if ((unsigned long) uid != ul) | |
340 | return -ERANGE; | |
341 | ||
342 | *ret_uid = uid; | |
343 | return 0; | |
344 | } | |
345 | ||
85261803 LP |
346 | int safe_atou(const char *s, unsigned *ret_u) { |
347 | char *x = NULL; | |
034c6ed7 | 348 | unsigned long l; |
85261803 LP |
349 | |
350 | assert(s); | |
351 | assert(ret_u); | |
352 | ||
353 | errno = 0; | |
354 | l = strtoul(s, &x, 0); | |
355 | ||
356 | if (!x || *x || errno) | |
357 | return errno ? -errno : -EINVAL; | |
358 | ||
034c6ed7 | 359 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
360 | return -ERANGE; |
361 | ||
362 | *ret_u = (unsigned) l; | |
363 | return 0; | |
364 | } | |
365 | ||
366 | int safe_atoi(const char *s, int *ret_i) { | |
367 | char *x = NULL; | |
034c6ed7 | 368 | long l; |
85261803 LP |
369 | |
370 | assert(s); | |
371 | assert(ret_i); | |
372 | ||
373 | errno = 0; | |
374 | l = strtol(s, &x, 0); | |
375 | ||
376 | if (!x || *x || errno) | |
377 | return errno ? -errno : -EINVAL; | |
378 | ||
034c6ed7 | 379 | if ((long) (int) l != l) |
85261803 LP |
380 | return -ERANGE; |
381 | ||
034c6ed7 LP |
382 | *ret_i = (int) l; |
383 | return 0; | |
384 | } | |
385 | ||
034c6ed7 LP |
386 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
387 | char *x = NULL; | |
388 | unsigned long long l; | |
389 | ||
390 | assert(s); | |
391 | assert(ret_llu); | |
392 | ||
393 | errno = 0; | |
394 | l = strtoull(s, &x, 0); | |
395 | ||
396 | if (!x || *x || errno) | |
397 | return errno ? -errno : -EINVAL; | |
398 | ||
399 | *ret_llu = l; | |
400 | return 0; | |
401 | } | |
402 | ||
403 | int safe_atolli(const char *s, long long int *ret_lli) { | |
404 | char *x = NULL; | |
405 | long long l; | |
406 | ||
407 | assert(s); | |
408 | assert(ret_lli); | |
409 | ||
410 | errno = 0; | |
411 | l = strtoll(s, &x, 0); | |
412 | ||
413 | if (!x || *x || errno) | |
414 | return errno ? -errno : -EINVAL; | |
415 | ||
416 | *ret_lli = l; | |
85261803 LP |
417 | return 0; |
418 | } | |
a41e8209 | 419 | |
a41e8209 | 420 | /* Split a string into words. */ |
65d2ebdc | 421 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
422 | char *current; |
423 | ||
424 | current = *state ? *state : (char*) c; | |
425 | ||
426 | if (!*current || *c == 0) | |
427 | return NULL; | |
428 | ||
65d2ebdc LP |
429 | current += strspn(current, separator); |
430 | *l = strcspn(current, separator); | |
82919e3d LP |
431 | *state = current+*l; |
432 | ||
433 | return (char*) current; | |
434 | } | |
435 | ||
034c6ed7 LP |
436 | /* Split a string into words, but consider strings enclosed in '' and |
437 | * "" as words even if they include spaces. */ | |
438 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
439 | char *current, *e; |
440 | bool escaped = false; | |
034c6ed7 LP |
441 | |
442 | current = *state ? *state : (char*) c; | |
443 | ||
444 | if (!*current || *c == 0) | |
445 | return NULL; | |
446 | ||
447 | current += strspn(current, WHITESPACE); | |
448 | ||
449 | if (*current == '\'') { | |
450 | current ++; | |
034c6ed7 | 451 | |
0bab36f2 LP |
452 | for (e = current; *e; e++) { |
453 | if (escaped) | |
454 | escaped = false; | |
455 | else if (*e == '\\') | |
456 | escaped = true; | |
457 | else if (*e == '\'') | |
458 | break; | |
459 | } | |
460 | ||
461 | *l = e-current; | |
462 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
463 | } else if (*current == '\"') { |
464 | current ++; | |
034c6ed7 | 465 | |
0bab36f2 LP |
466 | for (e = current; *e; e++) { |
467 | if (escaped) | |
468 | escaped = false; | |
469 | else if (*e == '\\') | |
470 | escaped = true; | |
471 | else if (*e == '\"') | |
472 | break; | |
473 | } | |
474 | ||
475 | *l = e-current; | |
476 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 477 | } else { |
0bab36f2 LP |
478 | for (e = current; *e; e++) { |
479 | if (escaped) | |
480 | escaped = false; | |
481 | else if (*e == '\\') | |
482 | escaped = true; | |
483 | else if (strchr(WHITESPACE, *e)) | |
484 | break; | |
485 | } | |
486 | *l = e-current; | |
487 | *state = e; | |
034c6ed7 LP |
488 | } |
489 | ||
490 | return (char*) current; | |
491 | } | |
492 | ||
034c6ed7 LP |
493 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
494 | int r; | |
2fbe635a | 495 | _cleanup_fclose_ FILE *f = NULL; |
20c03b7b | 496 | char fn[PATH_MAX], line[LINE_MAX], *p; |
bb00e604 | 497 | long unsigned ppid; |
034c6ed7 | 498 | |
8480e784 | 499 | assert(pid > 0); |
034c6ed7 LP |
500 | assert(_ppid); |
501 | ||
bb00e604 | 502 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
8480e784 | 503 | char_array_0(fn); |
034c6ed7 | 504 | |
2fbe635a LP |
505 | f = fopen(fn, "re"); |
506 | if (!f) | |
034c6ed7 LP |
507 | return -errno; |
508 | ||
2fbe635a | 509 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 510 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
511 | fclose(f); |
512 | return r; | |
513 | } | |
514 | ||
034c6ed7 LP |
515 | /* Let's skip the pid and comm fields. The latter is enclosed |
516 | * in () but does not escape any () in its value, so let's | |
517 | * skip over it manually */ | |
518 | ||
2fbe635a LP |
519 | p = strrchr(line, ')'); |
520 | if (!p) | |
034c6ed7 LP |
521 | return -EIO; |
522 | ||
523 | p++; | |
524 | ||
525 | if (sscanf(p, " " | |
526 | "%*c " /* state */ | |
bb00e604 | 527 | "%lu ", /* ppid */ |
034c6ed7 LP |
528 | &ppid) != 1) |
529 | return -EIO; | |
530 | ||
bb00e604 | 531 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
532 | return -ERANGE; |
533 | ||
534 | *_ppid = (pid_t) ppid; | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
7640a5de | 539 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
e67f47e5 | 540 | _cleanup_fclose_ FILE *f = NULL; |
7640a5de LP |
541 | char fn[PATH_MAX], line[LINE_MAX], *p; |
542 | ||
543 | assert(pid > 0); | |
544 | assert(st); | |
545 | ||
546 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); | |
547 | char_array_0(fn); | |
548 | ||
e67f47e5 LP |
549 | f = fopen(fn, "re"); |
550 | if (!f) | |
7640a5de LP |
551 | return -errno; |
552 | ||
e67f47e5 LP |
553 | if (!fgets(line, sizeof(line), f)) { |
554 | if (ferror(f)) | |
555 | return -errno; | |
7640a5de | 556 | |
e67f47e5 LP |
557 | return -EIO; |
558 | } | |
7640a5de LP |
559 | |
560 | /* Let's skip the pid and comm fields. The latter is enclosed | |
561 | * in () but does not escape any () in its value, so let's | |
562 | * skip over it manually */ | |
563 | ||
e67f47e5 LP |
564 | p = strrchr(line, ')'); |
565 | if (!p) | |
7640a5de LP |
566 | return -EIO; |
567 | ||
568 | p++; | |
569 | ||
570 | if (sscanf(p, " " | |
571 | "%*c " /* state */ | |
572 | "%*d " /* ppid */ | |
573 | "%*d " /* pgrp */ | |
574 | "%*d " /* session */ | |
575 | "%*d " /* tty_nr */ | |
576 | "%*d " /* tpgid */ | |
577 | "%*u " /* flags */ | |
578 | "%*u " /* minflt */ | |
579 | "%*u " /* cminflt */ | |
580 | "%*u " /* majflt */ | |
581 | "%*u " /* cmajflt */ | |
582 | "%*u " /* utime */ | |
583 | "%*u " /* stime */ | |
584 | "%*d " /* cutime */ | |
585 | "%*d " /* cstime */ | |
586 | "%*d " /* priority */ | |
587 | "%*d " /* nice */ | |
588 | "%*d " /* num_threads */ | |
589 | "%*d " /* itrealvalue */ | |
590 | "%llu " /* starttime */, | |
591 | st) != 1) | |
592 | return -EIO; | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
034c6ed7 | 597 | int write_one_line_file(const char *fn, const char *line) { |
e67f47e5 | 598 | _cleanup_fclose_ FILE *f = NULL; |
034c6ed7 LP |
599 | |
600 | assert(fn); | |
601 | assert(line); | |
602 | ||
03ad1136 LP |
603 | f = fopen(fn, "we"); |
604 | if (!f) | |
034c6ed7 LP |
605 | return -errno; |
606 | ||
34ca941c | 607 | errno = 0; |
e67f47e5 LP |
608 | if (fputs(line, f) < 0) |
609 | return errno ? -errno : -EIO; | |
034c6ed7 | 610 | |
8e1bd70d LP |
611 | if (!endswith(line, "\n")) |
612 | fputc('\n', f); | |
613 | ||
151b190e LP |
614 | fflush(f); |
615 | ||
e67f47e5 LP |
616 | if (ferror(f)) |
617 | return errno ? -errno : -EIO; | |
151b190e | 618 | |
e67f47e5 | 619 | return 0; |
034c6ed7 LP |
620 | } |
621 | ||
34ca941c LP |
622 | int fchmod_umask(int fd, mode_t m) { |
623 | mode_t u; | |
624 | int r; | |
625 | ||
626 | u = umask(0777); | |
627 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
628 | umask(u); | |
629 | ||
630 | return r; | |
631 | } | |
632 | ||
633 | int write_one_line_file_atomic(const char *fn, const char *line) { | |
634 | FILE *f; | |
635 | int r; | |
636 | char *p; | |
637 | ||
638 | assert(fn); | |
639 | assert(line); | |
640 | ||
641 | r = fopen_temporary(fn, &f, &p); | |
642 | if (r < 0) | |
643 | return r; | |
644 | ||
645 | fchmod_umask(fileno(f), 0644); | |
646 | ||
647 | errno = 0; | |
648 | if (fputs(line, f) < 0) { | |
649 | r = -errno; | |
650 | goto finish; | |
651 | } | |
652 | ||
653 | if (!endswith(line, "\n")) | |
654 | fputc('\n', f); | |
655 | ||
656 | fflush(f); | |
657 | ||
658 | if (ferror(f)) { | |
659 | if (errno != 0) | |
660 | r = -errno; | |
661 | else | |
662 | r = -EIO; | |
663 | } else { | |
664 | if (rename(p, fn) < 0) | |
665 | r = -errno; | |
666 | else | |
667 | r = 0; | |
668 | } | |
669 | ||
670 | finish: | |
671 | if (r < 0) | |
672 | unlink(p); | |
673 | ||
674 | fclose(f); | |
675 | free(p); | |
676 | ||
677 | return r; | |
678 | } | |
679 | ||
034c6ed7 | 680 | int read_one_line_file(const char *fn, char **line) { |
2fbe635a | 681 | _cleanup_fclose_ FILE *f = NULL; |
97c4a07d | 682 | char t[LINE_MAX], *c; |
034c6ed7 LP |
683 | |
684 | assert(fn); | |
685 | assert(line); | |
686 | ||
4099a281 LP |
687 | f = fopen(fn, "re"); |
688 | if (!f) | |
034c6ed7 LP |
689 | return -errno; |
690 | ||
4099a281 LP |
691 | if (!fgets(t, sizeof(t), f)) { |
692 | ||
2fbe635a | 693 | if (ferror(f)) |
e67f47e5 | 694 | return errno ? -errno : -EIO; |
4099a281 LP |
695 | |
696 | t[0] = 0; | |
034c6ed7 LP |
697 | } |
698 | ||
4099a281 | 699 | c = strdup(t); |
2fbe635a LP |
700 | if (!c) |
701 | return -ENOMEM; | |
6f9a471a LP |
702 | truncate_nl(c); |
703 | ||
034c6ed7 | 704 | *line = c; |
2fbe635a | 705 | return 0; |
034c6ed7 | 706 | } |
44d8db9e | 707 | |
34ca941c | 708 | int read_full_file(const char *fn, char **contents, size_t *size) { |
2fbe635a | 709 | _cleanup_fclose_ FILE *f = NULL; |
97c4a07d | 710 | size_t n, l; |
2fbe635a | 711 | _cleanup_free_ char *buf = NULL; |
97c4a07d LP |
712 | struct stat st; |
713 | ||
2fbe635a LP |
714 | f = fopen(fn, "re"); |
715 | if (!f) | |
97c4a07d LP |
716 | return -errno; |
717 | ||
2fbe635a LP |
718 | if (fstat(fileno(f), &st) < 0) |
719 | return -errno; | |
97c4a07d | 720 | |
34ca941c | 721 | /* Safety check */ |
2fbe635a LP |
722 | if (st.st_size > 4*1024*1024) |
723 | return -E2BIG; | |
34ca941c | 724 | |
97c4a07d LP |
725 | n = st.st_size > 0 ? st.st_size : LINE_MAX; |
726 | l = 0; | |
727 | ||
728 | for (;;) { | |
729 | char *t; | |
730 | size_t k; | |
731 | ||
2fbe635a LP |
732 | t = realloc(buf, n+1); |
733 | if (!t) | |
734 | return -ENOMEM; | |
97c4a07d LP |
735 | |
736 | buf = t; | |
737 | k = fread(buf + l, 1, n - l, f); | |
738 | ||
739 | if (k <= 0) { | |
2fbe635a LP |
740 | if (ferror(f)) |
741 | return -errno; | |
97c4a07d LP |
742 | |
743 | break; | |
744 | } | |
745 | ||
746 | l += k; | |
747 | n *= 2; | |
748 | ||
749 | /* Safety check */ | |
2fbe635a LP |
750 | if (n > 4*1024*1024) |
751 | return -E2BIG; | |
97c4a07d LP |
752 | } |
753 | ||
f8440af5 | 754 | buf[l] = 0; |
97c4a07d LP |
755 | *contents = buf; |
756 | buf = NULL; | |
757 | ||
34ca941c LP |
758 | if (size) |
759 | *size = l; | |
760 | ||
2fbe635a | 761 | return 0; |
97c4a07d LP |
762 | } |
763 | ||
764 | int parse_env_file( | |
765 | const char *fname, | |
c899f8c6 | 766 | const char *separator, ...) { |
97c4a07d | 767 | |
ce8a6aa1 | 768 | int r = 0; |
44d91056 | 769 | char *contents = NULL, *p; |
97c4a07d LP |
770 | |
771 | assert(fname); | |
c899f8c6 | 772 | assert(separator); |
97c4a07d | 773 | |
34ca941c | 774 | if ((r = read_full_file(fname, &contents, NULL)) < 0) |
97c4a07d LP |
775 | return r; |
776 | ||
777 | p = contents; | |
778 | for (;;) { | |
779 | const char *key = NULL; | |
780 | ||
c899f8c6 | 781 | p += strspn(p, separator); |
97c4a07d LP |
782 | p += strspn(p, WHITESPACE); |
783 | ||
784 | if (!*p) | |
785 | break; | |
786 | ||
787 | if (!strchr(COMMENTS, *p)) { | |
788 | va_list ap; | |
789 | char **value; | |
790 | ||
c899f8c6 | 791 | va_start(ap, separator); |
97c4a07d LP |
792 | while ((key = va_arg(ap, char *))) { |
793 | size_t n; | |
794 | char *v; | |
795 | ||
796 | value = va_arg(ap, char **); | |
797 | ||
798 | n = strlen(key); | |
799 | if (strncmp(p, key, n) != 0 || | |
800 | p[n] != '=') | |
801 | continue; | |
802 | ||
803 | p += n + 1; | |
c899f8c6 | 804 | n = strcspn(p, separator); |
97c4a07d LP |
805 | |
806 | if (n >= 2 && | |
e7db37dd LP |
807 | strchr(QUOTES, p[0]) && |
808 | p[n-1] == p[0]) | |
97c4a07d LP |
809 | v = strndup(p+1, n-2); |
810 | else | |
811 | v = strndup(p, n); | |
812 | ||
813 | if (!v) { | |
814 | r = -ENOMEM; | |
815 | va_end(ap); | |
816 | goto fail; | |
817 | } | |
818 | ||
dd36de4d KS |
819 | if (v[0] == '\0') { |
820 | /* return empty value strings as NULL */ | |
821 | free(v); | |
822 | v = NULL; | |
823 | } | |
824 | ||
97c4a07d LP |
825 | free(*value); |
826 | *value = v; | |
827 | ||
828 | p += n; | |
ce8a6aa1 LP |
829 | |
830 | r ++; | |
97c4a07d LP |
831 | break; |
832 | } | |
833 | va_end(ap); | |
834 | } | |
835 | ||
836 | if (!key) | |
c899f8c6 | 837 | p += strcspn(p, separator); |
97c4a07d LP |
838 | } |
839 | ||
97c4a07d LP |
840 | fail: |
841 | free(contents); | |
842 | return r; | |
843 | } | |
844 | ||
8c7be95e LP |
845 | int load_env_file( |
846 | const char *fname, | |
847 | char ***rl) { | |
848 | ||
849 | FILE *f; | |
6a39419f | 850 | char **m = NULL; |
8c7be95e LP |
851 | int r; |
852 | ||
853 | assert(fname); | |
854 | assert(rl); | |
855 | ||
856 | if (!(f = fopen(fname, "re"))) | |
857 | return -errno; | |
858 | ||
859 | while (!feof(f)) { | |
860 | char l[LINE_MAX], *p, *u; | |
861 | char **t; | |
862 | ||
863 | if (!fgets(l, sizeof(l), f)) { | |
864 | if (feof(f)) | |
865 | break; | |
866 | ||
867 | r = -errno; | |
868 | goto finish; | |
869 | } | |
870 | ||
871 | p = strstrip(l); | |
872 | ||
873 | if (!*p) | |
874 | continue; | |
875 | ||
876 | if (strchr(COMMENTS, *p)) | |
877 | continue; | |
878 | ||
879 | if (!(u = normalize_env_assignment(p))) { | |
0d0f0c50 | 880 | r = log_oom(); |
8c7be95e LP |
881 | goto finish; |
882 | } | |
883 | ||
884 | t = strv_append(m, u); | |
885 | free(u); | |
886 | ||
887 | if (!t) { | |
0d0f0c50 | 888 | r = log_oom(); |
8c7be95e LP |
889 | goto finish; |
890 | } | |
891 | ||
892 | strv_free(m); | |
893 | m = t; | |
894 | } | |
895 | ||
896 | r = 0; | |
897 | ||
898 | *rl = m; | |
899 | m = NULL; | |
900 | ||
901 | finish: | |
902 | if (f) | |
903 | fclose(f); | |
904 | ||
905 | strv_free(m); | |
906 | ||
907 | return r; | |
908 | } | |
909 | ||
7640a5de | 910 | int write_env_file(const char *fname, char **l) { |
34ca941c | 911 | char **i, *p; |
7640a5de LP |
912 | FILE *f; |
913 | int r; | |
914 | ||
34ca941c LP |
915 | r = fopen_temporary(fname, &f, &p); |
916 | if (r < 0) | |
917 | return r; | |
7640a5de | 918 | |
34ca941c LP |
919 | fchmod_umask(fileno(f), 0644); |
920 | ||
921 | errno = 0; | |
7640a5de LP |
922 | STRV_FOREACH(i, l) { |
923 | fputs(*i, f); | |
924 | fputc('\n', f); | |
925 | } | |
926 | ||
927 | fflush(f); | |
928 | ||
34ca941c LP |
929 | if (ferror(f)) { |
930 | if (errno != 0) | |
931 | r = -errno; | |
932 | else | |
933 | r = -EIO; | |
934 | } else { | |
935 | if (rename(p, fname) < 0) | |
936 | r = -errno; | |
937 | else | |
938 | r = 0; | |
939 | } | |
940 | ||
941 | if (r < 0) | |
942 | unlink(p); | |
943 | ||
7640a5de | 944 | fclose(f); |
34ca941c | 945 | free(p); |
7640a5de LP |
946 | |
947 | return r; | |
948 | } | |
949 | ||
7072ced8 LP |
950 | char *truncate_nl(char *s) { |
951 | assert(s); | |
952 | ||
953 | s[strcspn(s, NEWLINE)] = 0; | |
954 | return s; | |
955 | } | |
956 | ||
87d2c1ff | 957 | int get_process_comm(pid_t pid, char **name) { |
7072ced8 LP |
958 | int r; |
959 | ||
7072ced8 LP |
960 | assert(name); |
961 | ||
87d2c1ff LP |
962 | if (pid == 0) |
963 | r = read_one_line_file("/proc/self/comm", name); | |
964 | else { | |
965 | char *p; | |
966 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) | |
967 | return -ENOMEM; | |
7072ced8 | 968 | |
87d2c1ff LP |
969 | r = read_one_line_file(p, name); |
970 | free(p); | |
971 | } | |
7072ced8 | 972 | |
87d2c1ff | 973 | return r; |
7072ced8 LP |
974 | } |
975 | ||
87d2c1ff LP |
976 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
977 | char *r, *k; | |
c59760ee LP |
978 | int c; |
979 | bool space = false; | |
980 | size_t left; | |
981 | FILE *f; | |
982 | ||
c59760ee LP |
983 | assert(max_length > 0); |
984 | assert(line); | |
985 | ||
87d2c1ff LP |
986 | if (pid == 0) |
987 | f = fopen("/proc/self/cmdline", "re"); | |
988 | else { | |
989 | char *p; | |
990 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
991 | return -ENOMEM; | |
c59760ee | 992 | |
87d2c1ff LP |
993 | f = fopen(p, "re"); |
994 | free(p); | |
995 | } | |
c59760ee LP |
996 | |
997 | if (!f) | |
998 | return -errno; | |
999 | ||
87d2c1ff LP |
1000 | r = new(char, max_length); |
1001 | if (!r) { | |
c59760ee LP |
1002 | fclose(f); |
1003 | return -ENOMEM; | |
1004 | } | |
1005 | ||
1006 | k = r; | |
1007 | left = max_length; | |
1008 | while ((c = getc(f)) != EOF) { | |
1009 | ||
1010 | if (isprint(c)) { | |
1011 | if (space) { | |
1012 | if (left <= 4) | |
1013 | break; | |
1014 | ||
1015 | *(k++) = ' '; | |
057fbb58 | 1016 | left--; |
c59760ee LP |
1017 | space = false; |
1018 | } | |
1019 | ||
1020 | if (left <= 4) | |
1021 | break; | |
1022 | ||
1023 | *(k++) = (char) c; | |
057fbb58 | 1024 | left--; |
c59760ee LP |
1025 | } else |
1026 | space = true; | |
1027 | } | |
1028 | ||
1029 | if (left <= 4) { | |
1030 | size_t n = MIN(left-1, 3U); | |
1031 | memcpy(k, "...", n); | |
1032 | k[n] = 0; | |
1033 | } else | |
1034 | *k = 0; | |
1035 | ||
1036 | fclose(f); | |
1037 | ||
35d2e7ec LP |
1038 | /* Kernel threads have no argv[] */ |
1039 | if (r[0] == 0) { | |
1040 | char *t; | |
1041 | int h; | |
1042 | ||
1043 | free(r); | |
1044 | ||
87d2c1ff LP |
1045 | if (!comm_fallback) |
1046 | return -ENOENT; | |
1047 | ||
1048 | h = get_process_comm(pid, &t); | |
1049 | if (h < 0) | |
35d2e7ec LP |
1050 | return h; |
1051 | ||
b7def684 | 1052 | r = strjoin("[", t, "]", NULL); |
35d2e7ec LP |
1053 | free(t); |
1054 | ||
87d2c1ff | 1055 | if (!r) |
35d2e7ec LP |
1056 | return -ENOMEM; |
1057 | } | |
fa776d8e | 1058 | |
c59760ee LP |
1059 | *line = r; |
1060 | return 0; | |
1061 | } | |
1062 | ||
1e5678d0 LP |
1063 | int is_kernel_thread(pid_t pid) { |
1064 | char *p; | |
1065 | size_t count; | |
1066 | char c; | |
1067 | bool eof; | |
1068 | FILE *f; | |
1069 | ||
1070 | if (pid == 0) | |
1071 | return 0; | |
1072 | ||
1073 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1074 | return -ENOMEM; | |
1075 | ||
1076 | f = fopen(p, "re"); | |
1077 | free(p); | |
1078 | ||
1079 | if (!f) | |
1080 | return -errno; | |
1081 | ||
1082 | count = fread(&c, 1, 1, f); | |
1083 | eof = feof(f); | |
1084 | fclose(f); | |
1085 | ||
1086 | /* Kernel threads have an empty cmdline */ | |
1087 | ||
1088 | if (count <= 0) | |
1089 | return eof ? 1 : -errno; | |
1090 | ||
1091 | return 0; | |
1092 | } | |
1093 | ||
87d2c1ff LP |
1094 | int get_process_exe(pid_t pid, char **name) { |
1095 | int r; | |
1096 | ||
1097 | assert(name); | |
1098 | ||
1099 | if (pid == 0) | |
1100 | r = readlink_malloc("/proc/self/exe", name); | |
1101 | else { | |
1102 | char *p; | |
1103 | if (asprintf(&p, "/proc/%lu/exe", (unsigned long) pid) < 0) | |
1104 | return -ENOMEM; | |
1105 | ||
1106 | r = readlink_malloc(p, name); | |
1107 | free(p); | |
1108 | } | |
1109 | ||
1110 | return r; | |
1111 | } | |
1112 | ||
901c3d0d | 1113 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
7e4ab3c5 LP |
1114 | char *p; |
1115 | FILE *f; | |
1116 | int r; | |
1117 | ||
1118 | assert(uid); | |
1119 | ||
1120 | if (pid == 0) | |
1121 | return getuid(); | |
1122 | ||
1123 | if (asprintf(&p, "/proc/%lu/status", (unsigned long) pid) < 0) | |
1124 | return -ENOMEM; | |
1125 | ||
1126 | f = fopen(p, "re"); | |
1127 | free(p); | |
1128 | ||
1129 | if (!f) | |
1130 | return -errno; | |
1131 | ||
1132 | while (!feof(f)) { | |
1133 | char line[LINE_MAX], *l; | |
1134 | ||
1135 | if (!fgets(line, sizeof(line), f)) { | |
1136 | if (feof(f)) | |
1137 | break; | |
1138 | ||
1139 | r = -errno; | |
1140 | goto finish; | |
1141 | } | |
1142 | ||
1143 | l = strstrip(line); | |
1144 | ||
901c3d0d LP |
1145 | if (startswith(l, field)) { |
1146 | l += strlen(field); | |
7e4ab3c5 LP |
1147 | l += strspn(l, WHITESPACE); |
1148 | ||
1149 | l[strcspn(l, WHITESPACE)] = 0; | |
1150 | ||
1151 | r = parse_uid(l, uid); | |
1152 | goto finish; | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | r = -EIO; | |
1157 | ||
1158 | finish: | |
1159 | fclose(f); | |
1160 | ||
1161 | return r; | |
1162 | } | |
1163 | ||
901c3d0d LP |
1164 | int get_process_uid(pid_t pid, uid_t *uid) { |
1165 | return get_process_id(pid, "Uid:", uid); | |
1166 | } | |
1167 | ||
1168 | int get_process_gid(pid_t pid, gid_t *gid) { | |
1169 | return get_process_id(pid, "Gid:", gid); | |
1170 | } | |
1171 | ||
fab56fc5 LP |
1172 | char *strnappend(const char *s, const char *suffix, size_t b) { |
1173 | size_t a; | |
44d8db9e LP |
1174 | char *r; |
1175 | ||
fab56fc5 LP |
1176 | if (!s && !suffix) |
1177 | return strdup(""); | |
1178 | ||
1179 | if (!s) | |
1180 | return strndup(suffix, b); | |
1181 | ||
1182 | if (!suffix) | |
1183 | return strdup(s); | |
1184 | ||
44d8db9e LP |
1185 | assert(s); |
1186 | assert(suffix); | |
1187 | ||
1188 | a = strlen(s); | |
aa408e77 | 1189 | if (b > ((size_t) -1) - a) |
040f18ea | 1190 | return NULL; |
44d8db9e | 1191 | |
040f18ea LP |
1192 | r = new(char, a+b+1); |
1193 | if (!r) | |
44d8db9e LP |
1194 | return NULL; |
1195 | ||
1196 | memcpy(r, s, a); | |
1197 | memcpy(r+a, suffix, b); | |
1198 | r[a+b] = 0; | |
1199 | ||
1200 | return r; | |
1201 | } | |
87f0e418 | 1202 | |
fab56fc5 LP |
1203 | char *strappend(const char *s, const char *suffix) { |
1204 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
1205 | } | |
1206 | ||
87f0e418 LP |
1207 | int readlink_malloc(const char *p, char **r) { |
1208 | size_t l = 100; | |
1209 | ||
1210 | assert(p); | |
1211 | assert(r); | |
1212 | ||
1213 | for (;;) { | |
1214 | char *c; | |
1215 | ssize_t n; | |
1216 | ||
1217 | if (!(c = new(char, l))) | |
1218 | return -ENOMEM; | |
1219 | ||
1220 | if ((n = readlink(p, c, l-1)) < 0) { | |
1221 | int ret = -errno; | |
1222 | free(c); | |
1223 | return ret; | |
1224 | } | |
1225 | ||
1226 | if ((size_t) n < l-1) { | |
1227 | c[n] = 0; | |
1228 | *r = c; | |
1229 | return 0; | |
1230 | } | |
1231 | ||
1232 | free(c); | |
1233 | l *= 2; | |
1234 | } | |
1235 | } | |
1236 | ||
2c7108c4 LP |
1237 | int readlink_and_make_absolute(const char *p, char **r) { |
1238 | char *target, *k; | |
1239 | int j; | |
1240 | ||
1241 | assert(p); | |
1242 | assert(r); | |
1243 | ||
1244 | if ((j = readlink_malloc(p, &target)) < 0) | |
1245 | return j; | |
1246 | ||
1247 | k = file_in_same_dir(p, target); | |
1248 | free(target); | |
1249 | ||
1250 | if (!k) | |
1251 | return -ENOMEM; | |
1252 | ||
1253 | *r = k; | |
1254 | return 0; | |
1255 | } | |
1256 | ||
83096483 LP |
1257 | int readlink_and_canonicalize(const char *p, char **r) { |
1258 | char *t, *s; | |
1259 | int j; | |
1260 | ||
1261 | assert(p); | |
1262 | assert(r); | |
1263 | ||
1264 | j = readlink_and_make_absolute(p, &t); | |
1265 | if (j < 0) | |
1266 | return j; | |
1267 | ||
1268 | s = canonicalize_file_name(t); | |
1269 | if (s) { | |
1270 | free(t); | |
1271 | *r = s; | |
1272 | } else | |
1273 | *r = t; | |
1274 | ||
1275 | path_kill_slashes(*r); | |
1276 | ||
1277 | return 0; | |
1278 | } | |
1279 | ||
2a987ee8 LP |
1280 | int reset_all_signal_handlers(void) { |
1281 | int sig; | |
1282 | ||
1283 | for (sig = 1; sig < _NSIG; sig++) { | |
1284 | struct sigaction sa; | |
1285 | ||
1286 | if (sig == SIGKILL || sig == SIGSTOP) | |
1287 | continue; | |
1288 | ||
1289 | zero(sa); | |
1290 | sa.sa_handler = SIG_DFL; | |
431c32bf | 1291 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
1292 | |
1293 | /* On Linux the first two RT signals are reserved by | |
1294 | * glibc, and sigaction() will return EINVAL for them. */ | |
1295 | if ((sigaction(sig, &sa, NULL) < 0)) | |
1296 | if (errno != EINVAL) | |
1297 | return -errno; | |
1298 | } | |
1299 | ||
8e274523 | 1300 | return 0; |
2a987ee8 | 1301 | } |
4a72ff34 LP |
1302 | |
1303 | char *strstrip(char *s) { | |
57a8eca8 | 1304 | char *e; |
4a72ff34 LP |
1305 | |
1306 | /* Drops trailing whitespace. Modifies the string in | |
1307 | * place. Returns pointer to first non-space character */ | |
1308 | ||
1309 | s += strspn(s, WHITESPACE); | |
1310 | ||
57a8eca8 LP |
1311 | for (e = strchr(s, 0); e > s; e --) |
1312 | if (!strchr(WHITESPACE, e[-1])) | |
1313 | break; | |
4a72ff34 | 1314 | |
57a8eca8 | 1315 | *e = 0; |
4a72ff34 LP |
1316 | |
1317 | return s; | |
4a72ff34 LP |
1318 | } |
1319 | ||
ee9b5e01 LP |
1320 | char *delete_chars(char *s, const char *bad) { |
1321 | char *f, *t; | |
1322 | ||
1323 | /* Drops all whitespace, regardless where in the string */ | |
1324 | ||
1325 | for (f = s, t = s; *f; f++) { | |
1326 | if (strchr(bad, *f)) | |
1327 | continue; | |
1328 | ||
1329 | *(t++) = *f; | |
1330 | } | |
1331 | ||
1332 | *t = 0; | |
1333 | ||
1334 | return s; | |
1335 | } | |
1336 | ||
ab1f0633 LP |
1337 | bool in_charset(const char *s, const char* charset) { |
1338 | const char *i; | |
1339 | ||
1340 | assert(s); | |
1341 | assert(charset); | |
1342 | ||
1343 | for (i = s; *i; i++) | |
1344 | if (!strchr(charset, *i)) | |
1345 | return false; | |
1346 | ||
1347 | return true; | |
1348 | } | |
1349 | ||
4a72ff34 LP |
1350 | char *file_in_same_dir(const char *path, const char *filename) { |
1351 | char *e, *r; | |
1352 | size_t k; | |
1353 | ||
1354 | assert(path); | |
1355 | assert(filename); | |
1356 | ||
1357 | /* This removes the last component of path and appends | |
1358 | * filename, unless the latter is absolute anyway or the | |
1359 | * former isn't */ | |
1360 | ||
1361 | if (path_is_absolute(filename)) | |
1362 | return strdup(filename); | |
1363 | ||
1364 | if (!(e = strrchr(path, '/'))) | |
1365 | return strdup(filename); | |
1366 | ||
1367 | k = strlen(filename); | |
1368 | if (!(r = new(char, e-path+1+k+1))) | |
1369 | return NULL; | |
1370 | ||
1371 | memcpy(r, path, e-path+1); | |
1372 | memcpy(r+(e-path)+1, filename, k+1); | |
1373 | ||
1374 | return r; | |
1375 | } | |
fb624d04 | 1376 | |
c32dd69b LP |
1377 | int rmdir_parents(const char *path, const char *stop) { |
1378 | size_t l; | |
1379 | int r = 0; | |
1380 | ||
1381 | assert(path); | |
1382 | assert(stop); | |
1383 | ||
1384 | l = strlen(path); | |
1385 | ||
1386 | /* Skip trailing slashes */ | |
1387 | while (l > 0 && path[l-1] == '/') | |
1388 | l--; | |
1389 | ||
1390 | while (l > 0) { | |
1391 | char *t; | |
1392 | ||
1393 | /* Skip last component */ | |
1394 | while (l > 0 && path[l-1] != '/') | |
1395 | l--; | |
1396 | ||
1397 | /* Skip trailing slashes */ | |
1398 | while (l > 0 && path[l-1] == '/') | |
1399 | l--; | |
1400 | ||
1401 | if (l <= 0) | |
1402 | break; | |
1403 | ||
1404 | if (!(t = strndup(path, l))) | |
1405 | return -ENOMEM; | |
1406 | ||
1407 | if (path_startswith(stop, t)) { | |
1408 | free(t); | |
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | r = rmdir(t); | |
1413 | free(t); | |
1414 | ||
1415 | if (r < 0) | |
1416 | if (errno != ENOENT) | |
1417 | return -errno; | |
1418 | } | |
1419 | ||
1420 | return 0; | |
1421 | } | |
1422 | ||
1423 | ||
fb624d04 LP |
1424 | char hexchar(int x) { |
1425 | static const char table[16] = "0123456789abcdef"; | |
1426 | ||
1427 | return table[x & 15]; | |
1428 | } | |
4fe88d28 LP |
1429 | |
1430 | int unhexchar(char c) { | |
1431 | ||
1432 | if (c >= '0' && c <= '9') | |
1433 | return c - '0'; | |
1434 | ||
1435 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1436 | return c - 'a' + 10; |
4fe88d28 LP |
1437 | |
1438 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1439 | return c - 'A' + 10; |
4fe88d28 LP |
1440 | |
1441 | return -1; | |
1442 | } | |
1443 | ||
1444 | char octchar(int x) { | |
1445 | return '0' + (x & 7); | |
1446 | } | |
1447 | ||
1448 | int unoctchar(char c) { | |
1449 | ||
1450 | if (c >= '0' && c <= '7') | |
1451 | return c - '0'; | |
1452 | ||
1453 | return -1; | |
1454 | } | |
1455 | ||
5af98f82 LP |
1456 | char decchar(int x) { |
1457 | return '0' + (x % 10); | |
1458 | } | |
1459 | ||
1460 | int undecchar(char c) { | |
1461 | ||
1462 | if (c >= '0' && c <= '9') | |
1463 | return c - '0'; | |
1464 | ||
1465 | return -1; | |
1466 | } | |
1467 | ||
4fe88d28 LP |
1468 | char *cescape(const char *s) { |
1469 | char *r, *t; | |
1470 | const char *f; | |
1471 | ||
1472 | assert(s); | |
1473 | ||
1474 | /* Does C style string escaping. */ | |
1475 | ||
f8e2fb7b LP |
1476 | r = new(char, strlen(s)*4 + 1); |
1477 | if (!r) | |
4fe88d28 LP |
1478 | return NULL; |
1479 | ||
1480 | for (f = s, t = r; *f; f++) | |
1481 | ||
1482 | switch (*f) { | |
1483 | ||
1484 | case '\a': | |
1485 | *(t++) = '\\'; | |
1486 | *(t++) = 'a'; | |
1487 | break; | |
1488 | case '\b': | |
1489 | *(t++) = '\\'; | |
1490 | *(t++) = 'b'; | |
1491 | break; | |
1492 | case '\f': | |
1493 | *(t++) = '\\'; | |
1494 | *(t++) = 'f'; | |
1495 | break; | |
1496 | case '\n': | |
1497 | *(t++) = '\\'; | |
1498 | *(t++) = 'n'; | |
1499 | break; | |
1500 | case '\r': | |
1501 | *(t++) = '\\'; | |
1502 | *(t++) = 'r'; | |
1503 | break; | |
1504 | case '\t': | |
1505 | *(t++) = '\\'; | |
1506 | *(t++) = 't'; | |
1507 | break; | |
1508 | case '\v': | |
1509 | *(t++) = '\\'; | |
1510 | *(t++) = 'v'; | |
1511 | break; | |
1512 | case '\\': | |
1513 | *(t++) = '\\'; | |
1514 | *(t++) = '\\'; | |
1515 | break; | |
1516 | case '"': | |
1517 | *(t++) = '\\'; | |
1518 | *(t++) = '"'; | |
1519 | break; | |
1520 | case '\'': | |
1521 | *(t++) = '\\'; | |
1522 | *(t++) = '\''; | |
1523 | break; | |
1524 | ||
1525 | default: | |
1526 | /* For special chars we prefer octal over | |
1527 | * hexadecimal encoding, simply because glib's | |
1528 | * g_strescape() does the same */ | |
1529 | if ((*f < ' ') || (*f >= 127)) { | |
1530 | *(t++) = '\\'; | |
1531 | *(t++) = octchar((unsigned char) *f >> 6); | |
1532 | *(t++) = octchar((unsigned char) *f >> 3); | |
1533 | *(t++) = octchar((unsigned char) *f); | |
1534 | } else | |
1535 | *(t++) = *f; | |
1536 | break; | |
1537 | } | |
1538 | ||
1539 | *t = 0; | |
1540 | ||
1541 | return r; | |
1542 | } | |
1543 | ||
5b4c61cd | 1544 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1545 | char *r, *t; |
1546 | const char *f; | |
5b4c61cd | 1547 | size_t pl; |
4fe88d28 LP |
1548 | |
1549 | assert(s); | |
1550 | ||
5b4c61cd LP |
1551 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1552 | ||
1553 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1554 | |
5b4c61cd | 1555 | r = new(char, pl+length+1); |
7f110ff9 | 1556 | if (!r) |
4fe88d28 LP |
1557 | return r; |
1558 | ||
5b4c61cd LP |
1559 | if (prefix) |
1560 | memcpy(r, prefix, pl); | |
1561 | ||
1562 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1563 | |
1564 | if (*f != '\\') { | |
1565 | *(t++) = *f; | |
1566 | continue; | |
1567 | } | |
1568 | ||
1569 | f++; | |
1570 | ||
1571 | switch (*f) { | |
1572 | ||
1573 | case 'a': | |
1574 | *(t++) = '\a'; | |
1575 | break; | |
1576 | case 'b': | |
1577 | *(t++) = '\b'; | |
1578 | break; | |
1579 | case 'f': | |
1580 | *(t++) = '\f'; | |
1581 | break; | |
1582 | case 'n': | |
1583 | *(t++) = '\n'; | |
1584 | break; | |
1585 | case 'r': | |
1586 | *(t++) = '\r'; | |
1587 | break; | |
1588 | case 't': | |
1589 | *(t++) = '\t'; | |
1590 | break; | |
1591 | case 'v': | |
1592 | *(t++) = '\v'; | |
1593 | break; | |
1594 | case '\\': | |
1595 | *(t++) = '\\'; | |
1596 | break; | |
1597 | case '"': | |
1598 | *(t++) = '"'; | |
1599 | break; | |
1600 | case '\'': | |
1601 | *(t++) = '\''; | |
1602 | break; | |
1603 | ||
e167fb86 LP |
1604 | case 's': |
1605 | /* This is an extension of the XDG syntax files */ | |
1606 | *(t++) = ' '; | |
1607 | break; | |
1608 | ||
4fe88d28 LP |
1609 | case 'x': { |
1610 | /* hexadecimal encoding */ | |
1611 | int a, b; | |
1612 | ||
7f110ff9 LP |
1613 | a = unhexchar(f[1]); |
1614 | b = unhexchar(f[2]); | |
1615 | ||
1616 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1617 | /* Invalid escape code, let's take it literal then */ |
1618 | *(t++) = '\\'; | |
1619 | *(t++) = 'x'; | |
1620 | } else { | |
1621 | *(t++) = (char) ((a << 4) | b); | |
1622 | f += 2; | |
1623 | } | |
1624 | ||
1625 | break; | |
1626 | } | |
1627 | ||
1628 | case '0': | |
1629 | case '1': | |
1630 | case '2': | |
1631 | case '3': | |
1632 | case '4': | |
1633 | case '5': | |
1634 | case '6': | |
1635 | case '7': { | |
1636 | /* octal encoding */ | |
1637 | int a, b, c; | |
1638 | ||
7f110ff9 LP |
1639 | a = unoctchar(f[0]); |
1640 | b = unoctchar(f[1]); | |
1641 | c = unoctchar(f[2]); | |
1642 | ||
1643 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1644 | /* Invalid escape code, let's take it literal then */ |
1645 | *(t++) = '\\'; | |
1646 | *(t++) = f[0]; | |
1647 | } else { | |
1648 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1649 | f += 2; | |
1650 | } | |
1651 | ||
1652 | break; | |
1653 | } | |
1654 | ||
1655 | case 0: | |
1656 | /* premature end of string.*/ | |
1657 | *(t++) = '\\'; | |
1658 | goto finish; | |
1659 | ||
1660 | default: | |
1661 | /* Invalid escape code, let's take it literal then */ | |
1662 | *(t++) = '\\'; | |
f3d4cc01 | 1663 | *(t++) = *f; |
4fe88d28 LP |
1664 | break; |
1665 | } | |
1666 | } | |
1667 | ||
1668 | finish: | |
1669 | *t = 0; | |
1670 | return r; | |
1671 | } | |
1672 | ||
5b4c61cd LP |
1673 | char *cunescape_length(const char *s, size_t length) { |
1674 | return cunescape_length_with_prefix(s, length, NULL); | |
1675 | } | |
1676 | ||
6febfd0d | 1677 | char *cunescape(const char *s) { |
5b4c61cd LP |
1678 | assert(s); |
1679 | ||
6febfd0d LP |
1680 | return cunescape_length(s, strlen(s)); |
1681 | } | |
4fe88d28 LP |
1682 | |
1683 | char *xescape(const char *s, const char *bad) { | |
1684 | char *r, *t; | |
1685 | const char *f; | |
1686 | ||
1687 | /* Escapes all chars in bad, in addition to \ and all special | |
1688 | * chars, in \xFF style escaping. May be reversed with | |
1689 | * cunescape. */ | |
1690 | ||
08ace05b LP |
1691 | r = new(char, strlen(s) * 4 + 1); |
1692 | if (!r) | |
4fe88d28 LP |
1693 | return NULL; |
1694 | ||
1695 | for (f = s, t = r; *f; f++) { | |
1696 | ||
b866264a LP |
1697 | if ((*f < ' ') || (*f >= 127) || |
1698 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1699 | *(t++) = '\\'; |
1700 | *(t++) = 'x'; | |
1701 | *(t++) = hexchar(*f >> 4); | |
1702 | *(t++) = hexchar(*f); | |
1703 | } else | |
1704 | *(t++) = *f; | |
1705 | } | |
1706 | ||
1707 | *t = 0; | |
1708 | ||
1709 | return r; | |
1710 | } | |
1711 | ||
ea430986 | 1712 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1713 | char *r, *t; |
1714 | const char *f; | |
1715 | ||
47be870b LP |
1716 | assert(s); |
1717 | ||
ea430986 LP |
1718 | /* Escapes all chars that D-Bus' object path cannot deal |
1719 | * with. Can be reverse with bus_path_unescape() */ | |
1720 | ||
1721 | if (!(r = new(char, strlen(s)*3+1))) | |
1722 | return NULL; | |
1723 | ||
1724 | for (f = s, t = r; *f; f++) { | |
1725 | ||
1726 | if (!(*f >= 'A' && *f <= 'Z') && | |
1727 | !(*f >= 'a' && *f <= 'z') && | |
1728 | !(*f >= '0' && *f <= '9')) { | |
1729 | *(t++) = '_'; | |
1730 | *(t++) = hexchar(*f >> 4); | |
1731 | *(t++) = hexchar(*f); | |
1732 | } else | |
1733 | *(t++) = *f; | |
1734 | } | |
1735 | ||
1736 | *t = 0; | |
1737 | ||
1738 | return r; | |
1739 | } | |
1740 | ||
9e2f7c11 | 1741 | char *bus_path_unescape(const char *f) { |
ea430986 | 1742 | char *r, *t; |
ea430986 | 1743 | |
9e2f7c11 | 1744 | assert(f); |
47be870b | 1745 | |
9e2f7c11 | 1746 | if (!(r = strdup(f))) |
ea430986 LP |
1747 | return NULL; |
1748 | ||
9e2f7c11 | 1749 | for (t = r; *f; f++) { |
ea430986 LP |
1750 | |
1751 | if (*f == '_') { | |
1752 | int a, b; | |
1753 | ||
1754 | if ((a = unhexchar(f[1])) < 0 || | |
1755 | (b = unhexchar(f[2])) < 0) { | |
1756 | /* Invalid escape code, let's take it literal then */ | |
1757 | *(t++) = '_'; | |
1758 | } else { | |
1759 | *(t++) = (char) ((a << 4) | b); | |
1760 | f += 2; | |
1761 | } | |
1762 | } else | |
1763 | *(t++) = *f; | |
1764 | } | |
1765 | ||
1766 | *t = 0; | |
1767 | ||
1768 | return r; | |
1769 | } | |
1770 | ||
67d51650 | 1771 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1772 | char *p; |
1773 | ||
67d51650 | 1774 | assert(t); |
4fe88d28 | 1775 | |
67d51650 | 1776 | for (p = t; *p; p++) |
4fe88d28 LP |
1777 | if (*p >= 'A' && *p <= 'Z') |
1778 | *p = *p - 'A' + 'a'; | |
1779 | ||
67d51650 | 1780 | return t; |
4fe88d28 | 1781 | } |
1dccbe19 | 1782 | |
a228a22f | 1783 | static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1784 | assert(filename); |
1785 | ||
1786 | return | |
1787 | filename[0] == '.' || | |
6c78be3c | 1788 | streq(filename, "lost+found") || |
e472d476 LP |
1789 | streq(filename, "aquota.user") || |
1790 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1791 | endswith(filename, ".rpmnew") || |
1792 | endswith(filename, ".rpmsave") || | |
1793 | endswith(filename, ".rpmorig") || | |
1794 | endswith(filename, ".dpkg-old") || | |
1795 | endswith(filename, ".dpkg-new") || | |
1796 | endswith(filename, ".swp"); | |
1797 | } | |
1798 | ||
a228a22f LP |
1799 | bool ignore_file(const char *filename) { |
1800 | assert(filename); | |
1801 | ||
1802 | if (endswith(filename, "~")) | |
1803 | return false; | |
1804 | ||
1805 | return ignore_file_allow_backup(filename); | |
1806 | } | |
1807 | ||
3a0ecb08 LP |
1808 | int fd_nonblock(int fd, bool nonblock) { |
1809 | int flags; | |
1810 | ||
1811 | assert(fd >= 0); | |
1812 | ||
1813 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1814 | return -errno; | |
1815 | ||
1816 | if (nonblock) | |
1817 | flags |= O_NONBLOCK; | |
1818 | else | |
1819 | flags &= ~O_NONBLOCK; | |
1820 | ||
1821 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1822 | return -errno; | |
1823 | ||
1824 | return 0; | |
1825 | } | |
1826 | ||
1827 | int fd_cloexec(int fd, bool cloexec) { | |
1828 | int flags; | |
1829 | ||
1830 | assert(fd >= 0); | |
1831 | ||
1832 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1833 | return -errno; | |
1834 | ||
1835 | if (cloexec) | |
1836 | flags |= FD_CLOEXEC; | |
1837 | else | |
1838 | flags &= ~FD_CLOEXEC; | |
1839 | ||
1840 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1841 | return -errno; | |
1842 | ||
1843 | return 0; | |
1844 | } | |
1845 | ||
b19be9eb LP |
1846 | static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
1847 | unsigned i; | |
1848 | ||
1849 | assert(n_fdset == 0 || fdset); | |
1850 | ||
1851 | for (i = 0; i < n_fdset; i++) | |
1852 | if (fdset[i] == fd) | |
1853 | return true; | |
1854 | ||
1855 | return false; | |
1856 | } | |
1857 | ||
a0d40ac5 LP |
1858 | int close_all_fds(const int except[], unsigned n_except) { |
1859 | DIR *d; | |
1860 | struct dirent *de; | |
1861 | int r = 0; | |
1862 | ||
b19be9eb LP |
1863 | assert(n_except == 0 || except); |
1864 | ||
1865 | d = opendir("/proc/self/fd"); | |
1866 | if (!d) { | |
1867 | int fd; | |
1868 | struct rlimit rl; | |
1869 | ||
1870 | /* When /proc isn't available (for example in chroots) | |
1871 | * the fallback is brute forcing through the fd | |
1872 | * table */ | |
1873 | ||
1874 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1875 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1876 | ||
1877 | if (fd_in_set(fd, except, n_except)) | |
1878 | continue; | |
1879 | ||
1880 | if (close_nointr(fd) < 0) | |
1881 | if (errno != EBADF && r == 0) | |
1882 | r = -errno; | |
1883 | } | |
1884 | ||
1885 | return r; | |
1886 | } | |
a0d40ac5 LP |
1887 | |
1888 | while ((de = readdir(d))) { | |
a7610064 | 1889 | int fd = -1; |
a0d40ac5 | 1890 | |
a16e1123 | 1891 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1892 | continue; |
1893 | ||
720ce21d LP |
1894 | if (safe_atoi(de->d_name, &fd) < 0) |
1895 | /* Let's better ignore this, just in case */ | |
1896 | continue; | |
a0d40ac5 LP |
1897 | |
1898 | if (fd < 3) | |
1899 | continue; | |
1900 | ||
1901 | if (fd == dirfd(d)) | |
1902 | continue; | |
1903 | ||
b19be9eb LP |
1904 | if (fd_in_set(fd, except, n_except)) |
1905 | continue; | |
a0d40ac5 | 1906 | |
720ce21d | 1907 | if (close_nointr(fd) < 0) { |
2f357920 | 1908 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1909 | if (errno != EBADF && r == 0) |
1910 | r = -errno; | |
2f357920 | 1911 | } |
a0d40ac5 LP |
1912 | } |
1913 | ||
a0d40ac5 LP |
1914 | closedir(d); |
1915 | return r; | |
1916 | } | |
1917 | ||
db12775d LP |
1918 | bool chars_intersect(const char *a, const char *b) { |
1919 | const char *p; | |
1920 | ||
1921 | /* Returns true if any of the chars in a are in b. */ | |
1922 | for (p = a; *p; p++) | |
1923 | if (strchr(b, *p)) | |
1924 | return true; | |
1925 | ||
1926 | return false; | |
1927 | } | |
1928 | ||
8b6c7120 LP |
1929 | char *format_timestamp(char *buf, size_t l, usec_t t) { |
1930 | struct tm tm; | |
1931 | time_t sec; | |
1932 | ||
1933 | assert(buf); | |
1934 | assert(l > 0); | |
1935 | ||
1936 | if (t <= 0) | |
1937 | return NULL; | |
1938 | ||
f872ec33 | 1939 | sec = (time_t) (t / USEC_PER_SEC); |
8b6c7120 LP |
1940 | |
1941 | if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0) | |
1942 | return NULL; | |
1943 | ||
1944 | return buf; | |
1945 | } | |
1946 | ||
584be568 LP |
1947 | char *format_timestamp_pretty(char *buf, size_t l, usec_t t) { |
1948 | usec_t n, d; | |
1949 | ||
1950 | n = now(CLOCK_REALTIME); | |
1951 | ||
1952 | if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) | |
1953 | return NULL; | |
1954 | ||
1955 | d = n - t; | |
1956 | ||
1957 | if (d >= USEC_PER_YEAR) | |
1958 | snprintf(buf, l, "%llu years and %llu months ago", | |
1959 | (unsigned long long) (d / USEC_PER_YEAR), | |
1960 | (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); | |
1961 | else if (d >= USEC_PER_MONTH) | |
1962 | snprintf(buf, l, "%llu months and %llu days ago", | |
1963 | (unsigned long long) (d / USEC_PER_MONTH), | |
1964 | (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); | |
1965 | else if (d >= USEC_PER_WEEK) | |
1966 | snprintf(buf, l, "%llu weeks and %llu days ago", | |
1967 | (unsigned long long) (d / USEC_PER_WEEK), | |
1968 | (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); | |
1969 | else if (d >= 2*USEC_PER_DAY) | |
1970 | snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); | |
1971 | else if (d >= 25*USEC_PER_HOUR) | |
1972 | snprintf(buf, l, "1 day and %lluh ago", | |
1973 | (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); | |
1974 | else if (d >= 6*USEC_PER_HOUR) | |
1975 | snprintf(buf, l, "%lluh ago", | |
1976 | (unsigned long long) (d / USEC_PER_HOUR)); | |
1977 | else if (d >= USEC_PER_HOUR) | |
1978 | snprintf(buf, l, "%lluh %llumin ago", | |
1979 | (unsigned long long) (d / USEC_PER_HOUR), | |
1980 | (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); | |
1981 | else if (d >= 5*USEC_PER_MINUTE) | |
1982 | snprintf(buf, l, "%llumin ago", | |
1983 | (unsigned long long) (d / USEC_PER_MINUTE)); | |
1984 | else if (d >= USEC_PER_MINUTE) | |
1985 | snprintf(buf, l, "%llumin %llus ago", | |
1986 | (unsigned long long) (d / USEC_PER_MINUTE), | |
1987 | (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); | |
1988 | else if (d >= USEC_PER_SEC) | |
1989 | snprintf(buf, l, "%llus ago", | |
1990 | (unsigned long long) (d / USEC_PER_SEC)); | |
1991 | else if (d >= USEC_PER_MSEC) | |
1992 | snprintf(buf, l, "%llums ago", | |
1993 | (unsigned long long) (d / USEC_PER_MSEC)); | |
1994 | else if (d > 0) | |
1995 | snprintf(buf, l, "%lluus ago", | |
1996 | (unsigned long long) d); | |
1997 | else | |
1998 | snprintf(buf, l, "now"); | |
1999 | ||
2000 | buf[l-1] = 0; | |
2001 | return buf; | |
2002 | } | |
2003 | ||
871d7de4 LP |
2004 | char *format_timespan(char *buf, size_t l, usec_t t) { |
2005 | static const struct { | |
2006 | const char *suffix; | |
2007 | usec_t usec; | |
2008 | } table[] = { | |
2009 | { "w", USEC_PER_WEEK }, | |
2010 | { "d", USEC_PER_DAY }, | |
2011 | { "h", USEC_PER_HOUR }, | |
2012 | { "min", USEC_PER_MINUTE }, | |
2013 | { "s", USEC_PER_SEC }, | |
2014 | { "ms", USEC_PER_MSEC }, | |
2015 | { "us", 1 }, | |
2016 | }; | |
2017 | ||
2018 | unsigned i; | |
2019 | char *p = buf; | |
2020 | ||
2021 | assert(buf); | |
2022 | assert(l > 0); | |
2023 | ||
2024 | if (t == (usec_t) -1) | |
2025 | return NULL; | |
2026 | ||
4502d22c LP |
2027 | if (t == 0) { |
2028 | snprintf(p, l, "0"); | |
2029 | p[l-1] = 0; | |
2030 | return p; | |
2031 | } | |
2032 | ||
871d7de4 LP |
2033 | /* The result of this function can be parsed with parse_usec */ |
2034 | ||
2035 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
2036 | int k; | |
2037 | size_t n; | |
2038 | ||
2039 | if (t < table[i].usec) | |
2040 | continue; | |
2041 | ||
2042 | if (l <= 1) | |
2043 | break; | |
2044 | ||
2045 | k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix); | |
2046 | n = MIN((size_t) k, l); | |
2047 | ||
2048 | l -= n; | |
2049 | p += n; | |
2050 | ||
2051 | t %= table[i].usec; | |
2052 | } | |
2053 | ||
2054 | *p = 0; | |
2055 | ||
2056 | return buf; | |
2057 | } | |
2058 | ||
42856c10 | 2059 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
2060 | static const char table[] = |
2061 | "cifs\0" | |
2062 | "smbfs\0" | |
2063 | "ncpfs\0" | |
2064 | "nfs\0" | |
2065 | "nfs4\0" | |
2066 | "gfs\0" | |
73836c5c | 2067 | "gfs2\0"; |
42856c10 | 2068 | |
a05f97b3 | 2069 | return nulstr_contains(table, fstype); |
42856c10 LP |
2070 | } |
2071 | ||
601f6a1e | 2072 | int chvt(int vt) { |
a05f97b3 | 2073 | _cleanup_close_ int fd; |
601f6a1e | 2074 | |
a05f97b3 LP |
2075 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
2076 | if (fd < 0) | |
601f6a1e LP |
2077 | return -errno; |
2078 | ||
2079 | if (vt < 0) { | |
2080 | int tiocl[2] = { | |
2081 | TIOCL_GETKMSGREDIRECT, | |
2082 | 0 | |
2083 | }; | |
2084 | ||
a05f97b3 LP |
2085 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
2086 | return -errno; | |
601f6a1e LP |
2087 | |
2088 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
2089 | } | |
2090 | ||
2091 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 2092 | return -errno; |
601f6a1e | 2093 | |
a05f97b3 | 2094 | return 0; |
601f6a1e LP |
2095 | } |
2096 | ||
8f2d43a0 | 2097 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
2098 | struct termios old_termios, new_termios; |
2099 | char c; | |
20c03b7b | 2100 | char line[LINE_MAX]; |
80876c20 LP |
2101 | |
2102 | assert(f); | |
2103 | assert(ret); | |
2104 | ||
2105 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
2106 | new_termios = old_termios; | |
2107 | ||
2108 | new_termios.c_lflag &= ~ICANON; | |
2109 | new_termios.c_cc[VMIN] = 1; | |
2110 | new_termios.c_cc[VTIME] = 0; | |
2111 | ||
2112 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
2113 | size_t k; | |
2114 | ||
8f2d43a0 LP |
2115 | if (t != (usec_t) -1) { |
2116 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
2117 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2118 | return -ETIMEDOUT; | |
2119 | } | |
2120 | } | |
2121 | ||
80876c20 LP |
2122 | k = fread(&c, 1, 1, f); |
2123 | ||
2124 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2125 | ||
2126 | if (k <= 0) | |
2127 | return -EIO; | |
2128 | ||
2129 | if (need_nl) | |
2130 | *need_nl = c != '\n'; | |
2131 | ||
2132 | *ret = c; | |
2133 | return 0; | |
2134 | } | |
2135 | } | |
2136 | ||
8f2d43a0 LP |
2137 | if (t != (usec_t) -1) |
2138 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
2139 | return -ETIMEDOUT; | |
2140 | ||
2141 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
2142 | return -EIO; |
2143 | ||
2144 | truncate_nl(line); | |
2145 | ||
2146 | if (strlen(line) != 1) | |
2147 | return -EBADMSG; | |
2148 | ||
2149 | if (need_nl) | |
2150 | *need_nl = false; | |
2151 | ||
2152 | *ret = line[0]; | |
2153 | return 0; | |
2154 | } | |
2155 | ||
2156 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 LP |
2157 | bool on_tty; |
2158 | ||
80876c20 LP |
2159 | assert(ret); |
2160 | assert(replies); | |
2161 | assert(text); | |
2162 | ||
1b39d4b9 LP |
2163 | on_tty = isatty(STDOUT_FILENO); |
2164 | ||
80876c20 LP |
2165 | for (;;) { |
2166 | va_list ap; | |
2167 | char c; | |
2168 | int r; | |
2169 | bool need_nl = true; | |
2170 | ||
1b39d4b9 | 2171 | if (on_tty) |
c1072ea0 | 2172 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 2173 | |
80876c20 LP |
2174 | va_start(ap, text); |
2175 | vprintf(text, ap); | |
2176 | va_end(ap); | |
2177 | ||
1b39d4b9 | 2178 | if (on_tty) |
c1072ea0 | 2179 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 2180 | |
80876c20 LP |
2181 | fflush(stdout); |
2182 | ||
8f2d43a0 LP |
2183 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
2184 | if (r < 0) { | |
80876c20 LP |
2185 | |
2186 | if (r == -EBADMSG) { | |
2187 | puts("Bad input, please try again."); | |
2188 | continue; | |
2189 | } | |
2190 | ||
2191 | putchar('\n'); | |
2192 | return r; | |
2193 | } | |
2194 | ||
2195 | if (need_nl) | |
2196 | putchar('\n'); | |
2197 | ||
2198 | if (strchr(replies, c)) { | |
2199 | *ret = c; | |
2200 | return 0; | |
2201 | } | |
2202 | ||
2203 | puts("Read unexpected character, please try again."); | |
2204 | } | |
2205 | } | |
2206 | ||
512947d4 | 2207 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
2208 | struct termios termios; |
2209 | int r = 0; | |
3fe5e5d4 LP |
2210 | |
2211 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
2212 | |
2213 | assert(fd >= 0); | |
2214 | ||
eed1d0e3 LP |
2215 | /* We leave locked terminal attributes untouched, so that |
2216 | * Plymouth may set whatever it wants to set, and we don't | |
2217 | * interfere with that. */ | |
3fe5e5d4 LP |
2218 | |
2219 | /* Disable exclusive mode, just in case */ | |
2220 | ioctl(fd, TIOCNXCL); | |
2221 | ||
5c0100a5 | 2222 | /* Switch to text mode */ |
512947d4 MS |
2223 | if (switch_to_text) |
2224 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 2225 | |
3fe5e5d4 | 2226 | /* Enable console unicode mode */ |
df465b3f | 2227 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
2228 | |
2229 | if (tcgetattr(fd, &termios) < 0) { | |
2230 | r = -errno; | |
2231 | goto finish; | |
2232 | } | |
2233 | ||
aaf694ca LP |
2234 | /* We only reset the stuff that matters to the software. How |
2235 | * hardware is set up we don't touch assuming that somebody | |
2236 | * else will do that for us */ | |
2237 | ||
2238 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
2239 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
2240 | termios.c_oflag |= ONLCR; | |
2241 | termios.c_cflag |= CREAD; | |
2242 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
2243 | ||
2244 | termios.c_cc[VINTR] = 03; /* ^C */ | |
2245 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
2246 | termios.c_cc[VERASE] = 0177; | |
2247 | termios.c_cc[VKILL] = 025; /* ^X */ | |
2248 | termios.c_cc[VEOF] = 04; /* ^D */ | |
2249 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
2250 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
2251 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
2252 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
2253 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
2254 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
2255 | termios.c_cc[VEOL] = 0; |
2256 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
2257 | |
2258 | termios.c_cc[VTIME] = 0; | |
2259 | termios.c_cc[VMIN] = 1; | |
2260 | ||
2261 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
2262 | r = -errno; | |
2263 | ||
2264 | finish: | |
2265 | /* Just in case, flush all crap out */ | |
2266 | tcflush(fd, TCIOFLUSH); | |
2267 | ||
2268 | return r; | |
2269 | } | |
2270 | ||
6ea832a2 LP |
2271 | int reset_terminal(const char *name) { |
2272 | int fd, r; | |
2273 | ||
2274 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
2275 | if (fd < 0) | |
2276 | return fd; | |
2277 | ||
512947d4 | 2278 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
2279 | close_nointr_nofail(fd); |
2280 | ||
2281 | return r; | |
2282 | } | |
2283 | ||
80876c20 LP |
2284 | int open_terminal(const char *name, int mode) { |
2285 | int fd, r; | |
f73f76ac | 2286 | unsigned c = 0; |
80876c20 | 2287 | |
f73f76ac LP |
2288 | /* |
2289 | * If a TTY is in the process of being closed opening it might | |
2290 | * cause EIO. This is horribly awful, but unlikely to be | |
2291 | * changed in the kernel. Hence we work around this problem by | |
2292 | * retrying a couple of times. | |
2293 | * | |
2294 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
2295 | */ | |
2296 | ||
2297 | for (;;) { | |
af6da548 LP |
2298 | fd = open(name, mode); |
2299 | if (fd >= 0) | |
f73f76ac LP |
2300 | break; |
2301 | ||
2302 | if (errno != EIO) | |
2303 | return -errno; | |
2304 | ||
af6da548 | 2305 | /* Max 1s in total */ |
f73f76ac LP |
2306 | if (c >= 20) |
2307 | return -errno; | |
2308 | ||
2309 | usleep(50 * USEC_PER_MSEC); | |
2310 | c++; | |
2311 | } | |
2312 | ||
2313 | if (fd < 0) | |
80876c20 LP |
2314 | return -errno; |
2315 | ||
af6da548 LP |
2316 | r = isatty(fd); |
2317 | if (r < 0) { | |
80876c20 LP |
2318 | close_nointr_nofail(fd); |
2319 | return -errno; | |
2320 | } | |
2321 | ||
2322 | if (!r) { | |
2323 | close_nointr_nofail(fd); | |
2324 | return -ENOTTY; | |
2325 | } | |
2326 | ||
2327 | return fd; | |
2328 | } | |
2329 | ||
2330 | int flush_fd(int fd) { | |
2331 | struct pollfd pollfd; | |
2332 | ||
2333 | zero(pollfd); | |
2334 | pollfd.fd = fd; | |
2335 | pollfd.events = POLLIN; | |
2336 | ||
2337 | for (;;) { | |
20c03b7b | 2338 | char buf[LINE_MAX]; |
80876c20 LP |
2339 | ssize_t l; |
2340 | int r; | |
2341 | ||
2342 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2343 | ||
2344 | if (errno == EINTR) | |
2345 | continue; | |
2346 | ||
2347 | return -errno; | |
2348 | } | |
2349 | ||
2350 | if (r == 0) | |
2351 | return 0; | |
2352 | ||
2353 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2354 | ||
2355 | if (errno == EINTR) | |
2356 | continue; | |
2357 | ||
2358 | if (errno == EAGAIN) | |
2359 | return 0; | |
2360 | ||
2361 | return -errno; | |
2362 | } | |
2363 | ||
2364 | if (l <= 0) | |
2365 | return 0; | |
2366 | } | |
2367 | } | |
2368 | ||
af6da548 LP |
2369 | int acquire_terminal( |
2370 | const char *name, | |
2371 | bool fail, | |
2372 | bool force, | |
2373 | bool ignore_tiocstty_eperm, | |
2374 | usec_t timeout) { | |
2375 | ||
4a0ff478 | 2376 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 2377 | usec_t ts = 0; |
32c4bef8 | 2378 | struct sigaction sa_old, sa_new; |
80876c20 LP |
2379 | |
2380 | assert(name); | |
2381 | ||
2382 | /* We use inotify to be notified when the tty is closed. We | |
2383 | * create the watch before checking if we can actually acquire | |
2384 | * it, so that we don't lose any event. | |
2385 | * | |
2386 | * Note: strictly speaking this actually watches for the | |
2387 | * device being closed, it does *not* really watch whether a | |
2388 | * tty loses its controlling process. However, unless some | |
2389 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2390 | * its tty otherwise this will not become a problem. As long | |
2391 | * as the administrator makes sure not configure any service | |
2392 | * on the same tty as an untrusted user this should not be a | |
2393 | * problem. (Which he probably should not do anyway.) */ | |
2394 | ||
af6da548 LP |
2395 | if (timeout != (usec_t) -1) |
2396 | ts = now(CLOCK_MONOTONIC); | |
2397 | ||
80876c20 | 2398 | if (!fail && !force) { |
af6da548 LP |
2399 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
2400 | if (notify < 0) { | |
80876c20 LP |
2401 | r = -errno; |
2402 | goto fail; | |
2403 | } | |
2404 | ||
af6da548 LP |
2405 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
2406 | if (wd < 0) { | |
80876c20 LP |
2407 | r = -errno; |
2408 | goto fail; | |
2409 | } | |
2410 | } | |
2411 | ||
2412 | for (;;) { | |
af6da548 LP |
2413 | if (notify >= 0) { |
2414 | r = flush_fd(notify); | |
2415 | if (r < 0) | |
e3d1855b | 2416 | goto fail; |
af6da548 | 2417 | } |
80876c20 LP |
2418 | |
2419 | /* We pass here O_NOCTTY only so that we can check the return | |
2420 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2421 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
2422 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
2423 | if (fd < 0) | |
6ea832a2 | 2424 | return fd; |
80876c20 | 2425 | |
32c4bef8 LP |
2426 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2427 | * if we already own the tty. */ | |
2428 | zero(sa_new); | |
2429 | sa_new.sa_handler = SIG_IGN; | |
2430 | sa_new.sa_flags = SA_RESTART; | |
2431 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2432 | ||
80876c20 | 2433 | /* First, try to get the tty */ |
32c4bef8 LP |
2434 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
2435 | r = -errno; | |
2436 | ||
2437 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
2438 | |
2439 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2440 | * returning EPERM, i.e. when very likely we already | |
2441 | * are have this controlling terminal. */ | |
32c4bef8 | 2442 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
2443 | r = 0; |
2444 | ||
32c4bef8 | 2445 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
2446 | goto fail; |
2447 | } | |
2448 | ||
2449 | if (r >= 0) | |
2450 | break; | |
2451 | ||
2452 | assert(!fail); | |
2453 | assert(!force); | |
2454 | assert(notify >= 0); | |
2455 | ||
2456 | for (;;) { | |
f601daa7 | 2457 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 2458 | ssize_t l; |
f601daa7 | 2459 | struct inotify_event *e; |
80876c20 | 2460 | |
af6da548 LP |
2461 | if (timeout != (usec_t) -1) { |
2462 | usec_t n; | |
2463 | ||
2464 | n = now(CLOCK_MONOTONIC); | |
2465 | if (ts + timeout < n) { | |
2466 | r = -ETIMEDOUT; | |
2467 | goto fail; | |
2468 | } | |
2469 | ||
2470 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
2471 | if (r < 0) | |
2472 | goto fail; | |
2473 | ||
2474 | if (r == 0) { | |
2475 | r = -ETIMEDOUT; | |
2476 | goto fail; | |
2477 | } | |
2478 | } | |
2479 | ||
2480 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
2481 | if (l < 0) { | |
80876c20 | 2482 | |
af6da548 | 2483 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
2484 | continue; |
2485 | ||
2486 | r = -errno; | |
2487 | goto fail; | |
2488 | } | |
2489 | ||
2490 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2491 | |
f601daa7 LP |
2492 | while (l > 0) { |
2493 | size_t step; | |
80876c20 | 2494 | |
f601daa7 | 2495 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2496 | r = -EIO; |
f601daa7 LP |
2497 | goto fail; |
2498 | } | |
80876c20 | 2499 | |
f601daa7 LP |
2500 | step = sizeof(struct inotify_event) + e->len; |
2501 | assert(step <= (size_t) l); | |
80876c20 | 2502 | |
f601daa7 LP |
2503 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2504 | l -= step; | |
80876c20 LP |
2505 | } |
2506 | ||
2507 | break; | |
2508 | } | |
2509 | ||
2510 | /* We close the tty fd here since if the old session | |
2511 | * ended our handle will be dead. It's important that | |
2512 | * we do this after sleeping, so that we don't enter | |
2513 | * an endless loop. */ | |
2514 | close_nointr_nofail(fd); | |
2515 | } | |
2516 | ||
2517 | if (notify >= 0) | |
a16e1123 | 2518 | close_nointr_nofail(notify); |
80876c20 | 2519 | |
512947d4 MS |
2520 | r = reset_terminal_fd(fd, true); |
2521 | if (r < 0) | |
80876c20 LP |
2522 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2523 | ||
2524 | return fd; | |
2525 | ||
2526 | fail: | |
2527 | if (fd >= 0) | |
a16e1123 | 2528 | close_nointr_nofail(fd); |
80876c20 LP |
2529 | |
2530 | if (notify >= 0) | |
a16e1123 | 2531 | close_nointr_nofail(notify); |
80876c20 LP |
2532 | |
2533 | return r; | |
2534 | } | |
2535 | ||
2536 | int release_terminal(void) { | |
2537 | int r = 0, fd; | |
57cd2192 | 2538 | struct sigaction sa_old, sa_new; |
80876c20 | 2539 | |
ccaa6149 | 2540 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0) |
80876c20 LP |
2541 | return -errno; |
2542 | ||
57cd2192 LP |
2543 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2544 | * by our own TIOCNOTTY */ | |
2545 | ||
2546 | zero(sa_new); | |
2547 | sa_new.sa_handler = SIG_IGN; | |
2548 | sa_new.sa_flags = SA_RESTART; | |
2549 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2550 | ||
80876c20 LP |
2551 | if (ioctl(fd, TIOCNOTTY) < 0) |
2552 | r = -errno; | |
2553 | ||
57cd2192 LP |
2554 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2555 | ||
80876c20 LP |
2556 | close_nointr_nofail(fd); |
2557 | return r; | |
2558 | } | |
2559 | ||
9a34ec5f LP |
2560 | int sigaction_many(const struct sigaction *sa, ...) { |
2561 | va_list ap; | |
2562 | int r = 0, sig; | |
2563 | ||
2564 | va_start(ap, sa); | |
2565 | while ((sig = va_arg(ap, int)) > 0) | |
2566 | if (sigaction(sig, sa, NULL) < 0) | |
2567 | r = -errno; | |
2568 | va_end(ap); | |
2569 | ||
2570 | return r; | |
2571 | } | |
2572 | ||
2573 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2574 | struct sigaction sa; |
9a34ec5f LP |
2575 | va_list ap; |
2576 | int r = 0; | |
a337c6fc LP |
2577 | |
2578 | zero(sa); | |
2579 | sa.sa_handler = SIG_IGN; | |
2580 | sa.sa_flags = SA_RESTART; | |
2581 | ||
9a34ec5f LP |
2582 | if (sigaction(sig, &sa, NULL) < 0) |
2583 | r = -errno; | |
2584 | ||
2585 | va_start(ap, sig); | |
2586 | while ((sig = va_arg(ap, int)) > 0) | |
2587 | if (sigaction(sig, &sa, NULL) < 0) | |
2588 | r = -errno; | |
2589 | va_end(ap); | |
2590 | ||
2591 | return r; | |
2592 | } | |
2593 | ||
2594 | int default_signals(int sig, ...) { | |
2595 | struct sigaction sa; | |
2596 | va_list ap; | |
2597 | int r = 0; | |
2598 | ||
2599 | zero(sa); | |
2600 | sa.sa_handler = SIG_DFL; | |
2601 | sa.sa_flags = SA_RESTART; | |
2602 | ||
2603 | if (sigaction(sig, &sa, NULL) < 0) | |
2604 | r = -errno; | |
2605 | ||
2606 | va_start(ap, sig); | |
2607 | while ((sig = va_arg(ap, int)) > 0) | |
2608 | if (sigaction(sig, &sa, NULL) < 0) | |
2609 | r = -errno; | |
2610 | va_end(ap); | |
2611 | ||
2612 | return r; | |
a337c6fc LP |
2613 | } |
2614 | ||
8d567588 LP |
2615 | int close_pipe(int p[]) { |
2616 | int a = 0, b = 0; | |
2617 | ||
2618 | assert(p); | |
2619 | ||
2620 | if (p[0] >= 0) { | |
2621 | a = close_nointr(p[0]); | |
2622 | p[0] = -1; | |
2623 | } | |
2624 | ||
2625 | if (p[1] >= 0) { | |
2626 | b = close_nointr(p[1]); | |
2627 | p[1] = -1; | |
2628 | } | |
2629 | ||
2630 | return a < 0 ? a : b; | |
2631 | } | |
2632 | ||
eb22ac37 | 2633 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2634 | uint8_t *p; |
2635 | ssize_t n = 0; | |
2636 | ||
2637 | assert(fd >= 0); | |
2638 | assert(buf); | |
2639 | ||
2640 | p = buf; | |
2641 | ||
2642 | while (nbytes > 0) { | |
2643 | ssize_t k; | |
2644 | ||
2645 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2646 | ||
eb22ac37 | 2647 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2648 | continue; |
2649 | ||
eb22ac37 | 2650 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2651 | struct pollfd pollfd; |
2652 | ||
2653 | zero(pollfd); | |
2654 | pollfd.fd = fd; | |
2655 | pollfd.events = POLLIN; | |
2656 | ||
2657 | if (poll(&pollfd, 1, -1) < 0) { | |
2658 | if (errno == EINTR) | |
2659 | continue; | |
2660 | ||
2661 | return n > 0 ? n : -errno; | |
2662 | } | |
2663 | ||
2664 | if (pollfd.revents != POLLIN) | |
2665 | return n > 0 ? n : -EIO; | |
2666 | ||
2667 | continue; | |
2668 | } | |
2669 | ||
2670 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2671 | } | |
2672 | ||
2673 | p += k; | |
2674 | nbytes -= k; | |
2675 | n += k; | |
2676 | } | |
2677 | ||
2678 | return n; | |
2679 | } | |
2680 | ||
eb22ac37 LP |
2681 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2682 | const uint8_t *p; | |
2683 | ssize_t n = 0; | |
2684 | ||
2685 | assert(fd >= 0); | |
2686 | assert(buf); | |
2687 | ||
2688 | p = buf; | |
2689 | ||
2690 | while (nbytes > 0) { | |
2691 | ssize_t k; | |
2692 | ||
fe652127 LP |
2693 | k = write(fd, p, nbytes); |
2694 | if (k <= 0) { | |
eb22ac37 LP |
2695 | |
2696 | if (k < 0 && errno == EINTR) | |
2697 | continue; | |
2698 | ||
2699 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2700 | struct pollfd pollfd; | |
2701 | ||
2702 | zero(pollfd); | |
2703 | pollfd.fd = fd; | |
2704 | pollfd.events = POLLOUT; | |
2705 | ||
2706 | if (poll(&pollfd, 1, -1) < 0) { | |
2707 | if (errno == EINTR) | |
2708 | continue; | |
2709 | ||
2710 | return n > 0 ? n : -errno; | |
2711 | } | |
2712 | ||
2713 | if (pollfd.revents != POLLOUT) | |
2714 | return n > 0 ? n : -EIO; | |
2715 | ||
2716 | continue; | |
2717 | } | |
2718 | ||
2719 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2720 | } | |
2721 | ||
2722 | p += k; | |
2723 | nbytes -= k; | |
2724 | n += k; | |
2725 | } | |
2726 | ||
2727 | return n; | |
2728 | } | |
2729 | ||
24a6e4a4 LP |
2730 | int parse_usec(const char *t, usec_t *usec) { |
2731 | static const struct { | |
2732 | const char *suffix; | |
2733 | usec_t usec; | |
2734 | } table[] = { | |
2735 | { "sec", USEC_PER_SEC }, | |
2736 | { "s", USEC_PER_SEC }, | |
2737 | { "min", USEC_PER_MINUTE }, | |
2738 | { "hr", USEC_PER_HOUR }, | |
2739 | { "h", USEC_PER_HOUR }, | |
2740 | { "d", USEC_PER_DAY }, | |
2741 | { "w", USEC_PER_WEEK }, | |
2742 | { "msec", USEC_PER_MSEC }, | |
2743 | { "ms", USEC_PER_MSEC }, | |
2744 | { "m", USEC_PER_MINUTE }, | |
2745 | { "usec", 1ULL }, | |
2746 | { "us", 1ULL }, | |
d88a251b | 2747 | { "", USEC_PER_SEC }, /* default is sec */ |
24a6e4a4 LP |
2748 | }; |
2749 | ||
2750 | const char *p; | |
2751 | usec_t r = 0; | |
2752 | ||
2753 | assert(t); | |
2754 | assert(usec); | |
2755 | ||
2756 | p = t; | |
2757 | do { | |
2758 | long long l; | |
2759 | char *e; | |
2760 | unsigned i; | |
2761 | ||
2762 | errno = 0; | |
2763 | l = strtoll(p, &e, 10); | |
2764 | ||
2765 | if (errno != 0) | |
2766 | return -errno; | |
2767 | ||
2768 | if (l < 0) | |
2769 | return -ERANGE; | |
2770 | ||
2771 | if (e == p) | |
2772 | return -EINVAL; | |
2773 | ||
2774 | e += strspn(e, WHITESPACE); | |
2775 | ||
2776 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2777 | if (startswith(e, table[i].suffix)) { | |
2778 | r += (usec_t) l * table[i].usec; | |
2779 | p = e + strlen(table[i].suffix); | |
2780 | break; | |
2781 | } | |
2782 | ||
2783 | if (i >= ELEMENTSOF(table)) | |
2784 | return -EINVAL; | |
2785 | ||
2786 | } while (*p != 0); | |
2787 | ||
2788 | *usec = r; | |
2789 | ||
2790 | return 0; | |
2791 | } | |
2792 | ||
d88a251b LP |
2793 | int parse_nsec(const char *t, nsec_t *nsec) { |
2794 | static const struct { | |
2795 | const char *suffix; | |
2796 | nsec_t nsec; | |
2797 | } table[] = { | |
2798 | { "sec", NSEC_PER_SEC }, | |
2799 | { "s", NSEC_PER_SEC }, | |
2800 | { "min", NSEC_PER_MINUTE }, | |
2801 | { "hr", NSEC_PER_HOUR }, | |
2802 | { "h", NSEC_PER_HOUR }, | |
2803 | { "d", NSEC_PER_DAY }, | |
2804 | { "w", NSEC_PER_WEEK }, | |
2805 | { "msec", NSEC_PER_MSEC }, | |
2806 | { "ms", NSEC_PER_MSEC }, | |
2807 | { "m", NSEC_PER_MINUTE }, | |
2808 | { "usec", NSEC_PER_USEC }, | |
2809 | { "us", NSEC_PER_USEC }, | |
2810 | { "nsec", 1ULL }, | |
2811 | { "ns", 1ULL }, | |
2812 | { "", 1ULL }, /* default is nsec */ | |
2813 | }; | |
2814 | ||
2815 | const char *p; | |
2816 | nsec_t r = 0; | |
2817 | ||
2818 | assert(t); | |
2819 | assert(nsec); | |
2820 | ||
2821 | p = t; | |
2822 | do { | |
2823 | long long l; | |
2824 | char *e; | |
2825 | unsigned i; | |
2826 | ||
2827 | errno = 0; | |
2828 | l = strtoll(p, &e, 10); | |
2829 | ||
2830 | if (errno != 0) | |
2831 | return -errno; | |
2832 | ||
2833 | if (l < 0) | |
2834 | return -ERANGE; | |
2835 | ||
2836 | if (e == p) | |
2837 | return -EINVAL; | |
2838 | ||
2839 | e += strspn(e, WHITESPACE); | |
2840 | ||
2841 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2842 | if (startswith(e, table[i].suffix)) { | |
2843 | r += (nsec_t) l * table[i].nsec; | |
2844 | p = e + strlen(table[i].suffix); | |
2845 | break; | |
2846 | } | |
2847 | ||
2848 | if (i >= ELEMENTSOF(table)) | |
2849 | return -EINVAL; | |
2850 | ||
2851 | } while (*p != 0); | |
2852 | ||
2853 | *nsec = r; | |
2854 | ||
2855 | return 0; | |
2856 | } | |
2857 | ||
ab1f0633 LP |
2858 | int parse_bytes(const char *t, off_t *bytes) { |
2859 | static const struct { | |
2860 | const char *suffix; | |
2861 | off_t factor; | |
2862 | } table[] = { | |
2863 | { "B", 1 }, | |
2864 | { "K", 1024ULL }, | |
2865 | { "M", 1024ULL*1024ULL }, | |
2866 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2867 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2868 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2869 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2870 | { "", 1 }, |
2871 | }; | |
2872 | ||
2873 | const char *p; | |
2874 | off_t r = 0; | |
2875 | ||
2876 | assert(t); | |
2877 | assert(bytes); | |
2878 | ||
2879 | p = t; | |
2880 | do { | |
2881 | long long l; | |
2882 | char *e; | |
2883 | unsigned i; | |
2884 | ||
2885 | errno = 0; | |
2886 | l = strtoll(p, &e, 10); | |
2887 | ||
2888 | if (errno != 0) | |
2889 | return -errno; | |
2890 | ||
2891 | if (l < 0) | |
2892 | return -ERANGE; | |
2893 | ||
2894 | if (e == p) | |
2895 | return -EINVAL; | |
2896 | ||
2897 | e += strspn(e, WHITESPACE); | |
2898 | ||
2899 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2900 | if (startswith(e, table[i].suffix)) { | |
2901 | r += (off_t) l * table[i].factor; | |
2902 | p = e + strlen(table[i].suffix); | |
2903 | break; | |
2904 | } | |
2905 | ||
2906 | if (i >= ELEMENTSOF(table)) | |
2907 | return -EINVAL; | |
2908 | ||
2909 | } while (*p != 0); | |
2910 | ||
2911 | *bytes = r; | |
2912 | ||
2913 | return 0; | |
2914 | } | |
2915 | ||
843d2643 LP |
2916 | int make_stdio(int fd) { |
2917 | int r, s, t; | |
2918 | ||
2919 | assert(fd >= 0); | |
2920 | ||
73836c5c LP |
2921 | r = dup3(fd, STDIN_FILENO, 0); |
2922 | s = dup3(fd, STDOUT_FILENO, 0); | |
2923 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2924 | |
2925 | if (fd >= 3) | |
2926 | close_nointr_nofail(fd); | |
2927 | ||
2928 | if (r < 0 || s < 0 || t < 0) | |
2929 | return -errno; | |
2930 | ||
73836c5c | 2931 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2932 | |
843d2643 LP |
2933 | return 0; |
2934 | } | |
2935 | ||
ade509ce LP |
2936 | int make_null_stdio(void) { |
2937 | int null_fd; | |
2938 | ||
cd3bd60a LP |
2939 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2940 | if (null_fd < 0) | |
ade509ce LP |
2941 | return -errno; |
2942 | ||
2943 | return make_stdio(null_fd); | |
2944 | } | |
2945 | ||
8407a5d0 LP |
2946 | bool is_device_path(const char *path) { |
2947 | ||
2948 | /* Returns true on paths that refer to a device, either in | |
2949 | * sysfs or in /dev */ | |
2950 | ||
2951 | return | |
2952 | path_startswith(path, "/dev/") || | |
2953 | path_startswith(path, "/sys/"); | |
2954 | } | |
2955 | ||
01f78473 | 2956 | int dir_is_empty(const char *path) { |
a05f97b3 | 2957 | _cleanup_closedir_ DIR *d; |
01f78473 | 2958 | int r; |
01f78473 | 2959 | |
a05f97b3 LP |
2960 | d = opendir(path); |
2961 | if (!d) | |
01f78473 LP |
2962 | return -errno; |
2963 | ||
2964 | for (;;) { | |
7d5e9c0f LP |
2965 | struct dirent *de; |
2966 | union dirent_storage buf; | |
01f78473 | 2967 | |
7d5e9c0f | 2968 | r = readdir_r(d, &buf.de, &de); |
a05f97b3 LP |
2969 | if (r > 0) |
2970 | return -r; | |
01f78473 | 2971 | |
a05f97b3 LP |
2972 | if (!de) |
2973 | return 1; | |
01f78473 | 2974 | |
a05f97b3 LP |
2975 | if (!ignore_file(de->d_name)) |
2976 | return 0; | |
2977 | } | |
01f78473 LP |
2978 | } |
2979 | ||
d3782d60 | 2980 | unsigned long long random_ull(void) { |
a05f97b3 | 2981 | _cleanup_close_ int fd; |
d3782d60 LP |
2982 | uint64_t ull; |
2983 | ssize_t r; | |
2984 | ||
ac0930c8 LP |
2985 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2986 | if (fd < 0) | |
d3782d60 LP |
2987 | goto fallback; |
2988 | ||
eb22ac37 | 2989 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
2990 | if (r != sizeof(ull)) |
2991 | goto fallback; | |
2992 | ||
2993 | return ull; | |
2994 | ||
2995 | fallback: | |
2996 | return random() * RAND_MAX + random(); | |
2997 | } | |
2998 | ||
5b6319dc LP |
2999 | void rename_process(const char name[8]) { |
3000 | assert(name); | |
3001 | ||
5d6b1584 LP |
3002 | /* This is a like a poor man's setproctitle(). It changes the |
3003 | * comm field, argv[0], and also the glibc's internally used | |
3004 | * name of the process. For the first one a limit of 16 chars | |
3005 | * applies, to the second one usually one of 10 (i.e. length | |
3006 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
3007 | * "systemd"). If you pass a longer string it will be | |
3008 | * truncated */ | |
5b6319dc | 3009 | |
5d6b1584 | 3010 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
3011 | |
3012 | if (program_invocation_name) | |
3013 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
3014 | |
3015 | if (saved_argc > 0) { | |
3016 | int i; | |
3017 | ||
3018 | if (saved_argv[0]) | |
3019 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
3020 | ||
3021 | for (i = 1; i < saved_argc; i++) { | |
3022 | if (!saved_argv[i]) | |
3023 | break; | |
3024 | ||
3025 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
3026 | } | |
3027 | } | |
5b6319dc LP |
3028 | } |
3029 | ||
7d793605 LP |
3030 | void sigset_add_many(sigset_t *ss, ...) { |
3031 | va_list ap; | |
3032 | int sig; | |
3033 | ||
3034 | assert(ss); | |
3035 | ||
3036 | va_start(ap, ss); | |
3037 | while ((sig = va_arg(ap, int)) > 0) | |
3038 | assert_se(sigaddset(ss, sig) == 0); | |
3039 | va_end(ap); | |
3040 | } | |
3041 | ||
ef2f1067 LP |
3042 | char* gethostname_malloc(void) { |
3043 | struct utsname u; | |
3044 | ||
3045 | assert_se(uname(&u) >= 0); | |
3046 | ||
344de609 | 3047 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
3048 | return strdup(u.nodename); |
3049 | ||
3050 | return strdup(u.sysname); | |
3051 | } | |
3052 | ||
344de609 LP |
3053 | bool hostname_is_set(void) { |
3054 | struct utsname u; | |
3055 | ||
3056 | assert_se(uname(&u) >= 0); | |
3057 | ||
3058 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
3059 | } | |
3060 | ||
7c5f152a | 3061 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 3062 | long bufsize; |
a05f97b3 LP |
3063 | char *name; |
3064 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 3065 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
3066 | |
3067 | /* Shortcut things to avoid NSS lookups */ | |
3068 | if (uid == 0) | |
3069 | return strdup("root"); | |
3070 | ||
7c5f152a LP |
3071 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
3072 | if (bufsize <= 0) | |
ef2f1067 LP |
3073 | bufsize = 4096; |
3074 | ||
7c5f152a LP |
3075 | buf = malloc(bufsize); |
3076 | if (!buf) | |
ef2f1067 LP |
3077 | return NULL; |
3078 | ||
a05f97b3 LP |
3079 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
3080 | return strdup(pw->pw_name); | |
ef2f1067 LP |
3081 | |
3082 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
3083 | return NULL; | |
3084 | ||
3085 | return name; | |
3086 | } | |
3087 | ||
7c5f152a LP |
3088 | char* getlogname_malloc(void) { |
3089 | uid_t uid; | |
3090 | struct stat st; | |
3091 | ||
3092 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
3093 | uid = st.st_uid; | |
3094 | else | |
3095 | uid = getuid(); | |
3096 | ||
3097 | return lookup_uid(uid); | |
3098 | } | |
3099 | ||
3100 | char *getusername_malloc(void) { | |
3101 | const char *e; | |
3102 | ||
3103 | e = getenv("USER"); | |
3104 | if (e) | |
3105 | return strdup(e); | |
3106 | ||
3107 | return lookup_uid(getuid()); | |
3108 | } | |
3109 | ||
fc116c6a LP |
3110 | int getttyname_malloc(int fd, char **r) { |
3111 | char path[PATH_MAX], *c; | |
618e02c7 | 3112 | int k; |
8c6db833 LP |
3113 | |
3114 | assert(r); | |
ef2f1067 | 3115 | |
a05f97b3 LP |
3116 | k = ttyname_r(fd, path, sizeof(path)); |
3117 | if (k != 0) | |
618e02c7 | 3118 | return -k; |
ef2f1067 LP |
3119 | |
3120 | char_array_0(path); | |
3121 | ||
a05f97b3 LP |
3122 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
3123 | if (!c) | |
8c6db833 LP |
3124 | return -ENOMEM; |
3125 | ||
3126 | *r = c; | |
3127 | return 0; | |
3128 | } | |
3129 | ||
fc116c6a LP |
3130 | int getttyname_harder(int fd, char **r) { |
3131 | int k; | |
3132 | char *s; | |
3133 | ||
a05f97b3 LP |
3134 | k = getttyname_malloc(fd, &s); |
3135 | if (k < 0) | |
fc116c6a LP |
3136 | return k; |
3137 | ||
3138 | if (streq(s, "tty")) { | |
3139 | free(s); | |
4d6d6518 | 3140 | return get_ctty(0, NULL, r); |
fc116c6a LP |
3141 | } |
3142 | ||
3143 | *r = s; | |
3144 | return 0; | |
3145 | } | |
3146 | ||
4d6d6518 | 3147 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
fc116c6a | 3148 | int k; |
4d6d6518 | 3149 | char line[LINE_MAX], *p, *fn; |
fc116c6a LP |
3150 | unsigned long ttynr; |
3151 | FILE *f; | |
3152 | ||
4d6d6518 LP |
3153 | if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0) |
3154 | return -ENOMEM; | |
3155 | ||
3156 | f = fopen(fn, "re"); | |
3157 | free(fn); | |
3158 | if (!f) | |
fc116c6a LP |
3159 | return -errno; |
3160 | ||
4d6d6518 | 3161 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 3162 | k = feof(f) ? -EIO : -errno; |
fc116c6a LP |
3163 | fclose(f); |
3164 | return k; | |
3165 | } | |
3166 | ||
3167 | fclose(f); | |
3168 | ||
4d6d6518 LP |
3169 | p = strrchr(line, ')'); |
3170 | if (!p) | |
fc116c6a LP |
3171 | return -EIO; |
3172 | ||
3173 | p++; | |
3174 | ||
3175 | if (sscanf(p, " " | |
3176 | "%*c " /* state */ | |
3177 | "%*d " /* ppid */ | |
3178 | "%*d " /* pgrp */ | |
3179 | "%*d " /* session */ | |
3180 | "%lu ", /* ttynr */ | |
3181 | &ttynr) != 1) | |
3182 | return -EIO; | |
3183 | ||
3184 | *d = (dev_t) ttynr; | |
3185 | return 0; | |
3186 | } | |
3187 | ||
4d6d6518 | 3188 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 3189 | int k; |
20c03b7b | 3190 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
3191 | dev_t devnr; |
3192 | ||
3193 | assert(r); | |
3194 | ||
4d6d6518 LP |
3195 | k = get_ctty_devnr(pid, &devnr); |
3196 | if (k < 0) | |
fc116c6a LP |
3197 | return k; |
3198 | ||
3199 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
3200 | char_array_0(fn); | |
3201 | ||
3202 | if ((k = readlink_malloc(fn, &s)) < 0) { | |
3203 | ||
3204 | if (k != -ENOENT) | |
3205 | return k; | |
3206 | ||
46824d0e LP |
3207 | /* This is an ugly hack */ |
3208 | if (major(devnr) == 136) { | |
3209 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
3210 | return -ENOMEM; | |
3211 | ||
3212 | *r = b; | |
3213 | if (_devnr) | |
3214 | *_devnr = devnr; | |
3215 | ||
3216 | return 0; | |
3217 | } | |
3218 | ||
fc116c6a LP |
3219 | /* Probably something like the ptys which have no |
3220 | * symlink in /dev/char. Let's return something | |
3221 | * vaguely useful. */ | |
3222 | ||
3223 | if (!(b = strdup(fn + 5))) | |
3224 | return -ENOMEM; | |
3225 | ||
3226 | *r = b; | |
46824d0e LP |
3227 | if (_devnr) |
3228 | *_devnr = devnr; | |
3229 | ||
fc116c6a LP |
3230 | return 0; |
3231 | } | |
3232 | ||
3233 | if (startswith(s, "/dev/")) | |
3234 | p = s + 5; | |
3235 | else if (startswith(s, "../")) | |
3236 | p = s + 3; | |
3237 | else | |
3238 | p = s; | |
3239 | ||
3240 | b = strdup(p); | |
3241 | free(s); | |
3242 | ||
3243 | if (!b) | |
3244 | return -ENOMEM; | |
3245 | ||
3246 | *r = b; | |
46824d0e LP |
3247 | if (_devnr) |
3248 | *_devnr = devnr; | |
3249 | ||
fc116c6a LP |
3250 | return 0; |
3251 | } | |
3252 | ||
f56d5db9 | 3253 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
3254 | DIR *d; |
3255 | int ret = 0; | |
3256 | ||
3257 | assert(fd >= 0); | |
3258 | ||
3259 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 3260 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 3261 | |
d4d046e3 LP |
3262 | d = fdopendir(fd); |
3263 | if (!d) { | |
8c6db833 | 3264 | close_nointr_nofail(fd); |
4c633005 LP |
3265 | |
3266 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
3267 | } |
3268 | ||
3269 | for (;;) { | |
7d5e9c0f LP |
3270 | struct dirent *de; |
3271 | union dirent_storage buf; | |
7925c22a LP |
3272 | bool is_dir, keep_around; |
3273 | struct stat st; | |
8c6db833 LP |
3274 | int r; |
3275 | ||
7d5e9c0f | 3276 | r = readdir_r(d, &buf.de, &de); |
d4d046e3 LP |
3277 | if (r != 0 && ret == 0) { |
3278 | ret = -r; | |
8c6db833 LP |
3279 | break; |
3280 | } | |
3281 | ||
3282 | if (!de) | |
3283 | break; | |
3284 | ||
3285 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
3286 | continue; | |
3287 | ||
7925c22a LP |
3288 | if (de->d_type == DT_UNKNOWN || |
3289 | honour_sticky || | |
3290 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 3291 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 3292 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3293 | ret = -errno; |
3294 | continue; | |
3295 | } | |
3296 | ||
3297 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
3298 | keep_around = |
3299 | honour_sticky && | |
3300 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
3301 | (st.st_mode & S_ISVTX); | |
ad293f5a | 3302 | } else { |
8c6db833 | 3303 | is_dir = de->d_type == DT_DIR; |
7925c22a | 3304 | keep_around = false; |
ad293f5a | 3305 | } |
8c6db833 LP |
3306 | |
3307 | if (is_dir) { | |
3308 | int subdir_fd; | |
8c6db833 | 3309 | |
597f43c7 | 3310 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
3311 | if (root_dev && st.st_dev != root_dev->st_dev) |
3312 | continue; | |
8c6db833 | 3313 | |
7925c22a LP |
3314 | subdir_fd = openat(fd, de->d_name, |
3315 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
3316 | if (subdir_fd < 0) { | |
3317 | if (ret == 0 && errno != ENOENT) | |
3318 | ret = -errno; | |
3319 | continue; | |
3320 | } | |
3321 | ||
b3d28469 | 3322 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
3323 | if (r < 0 && ret == 0) |
3324 | ret = r; | |
3325 | ||
3326 | if (!keep_around) | |
3327 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
3328 | if (ret == 0 && errno != ENOENT) |
3329 | ret = -errno; | |
3330 | } | |
3331 | ||
3332 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
3333 | |
3334 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3335 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3336 | ret = -errno; |
3337 | } | |
3338 | } | |
3339 | } | |
3340 | ||
3341 | closedir(d); | |
3342 | ||
3343 | return ret; | |
3344 | } | |
3345 | ||
f56d5db9 LP |
3346 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
3347 | struct statfs s; | |
3348 | ||
3349 | assert(fd >= 0); | |
3350 | ||
3351 | if (fstatfs(fd, &s) < 0) { | |
3352 | close_nointr_nofail(fd); | |
3353 | return -errno; | |
3354 | } | |
3355 | ||
3356 | /* We refuse to clean disk file systems with this call. This | |
3357 | * is extra paranoia just to be sure we never ever remove | |
3358 | * non-state data */ | |
3359 | ||
3360 | if (s.f_type != TMPFS_MAGIC && | |
3361 | s.f_type != RAMFS_MAGIC) { | |
3362 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3363 | close_nointr_nofail(fd); | |
3364 | return -EPERM; | |
3365 | } | |
3366 | ||
3367 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
3368 | } | |
3369 | ||
3370 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
3371 | int fd, r; | |
3372 | struct statfs s; | |
8c6db833 LP |
3373 | |
3374 | assert(path); | |
3375 | ||
f56d5db9 LP |
3376 | /* We refuse to clean the root file system with this |
3377 | * call. This is extra paranoia to never cause a really | |
3378 | * seriously broken system. */ | |
3379 | if (path_equal(path, "/")) { | |
3380 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
3381 | return -EPERM; | |
3382 | } | |
461b1822 | 3383 | |
d4d046e3 LP |
3384 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
3385 | if (fd < 0) { | |
8c6db833 LP |
3386 | |
3387 | if (errno != ENOTDIR) | |
3388 | return -errno; | |
3389 | ||
f56d5db9 LP |
3390 | if (!dangerous) { |
3391 | if (statfs(path, &s) < 0) | |
3392 | return -errno; | |
3393 | ||
3394 | if (s.f_type != TMPFS_MAGIC && | |
3395 | s.f_type != RAMFS_MAGIC) { | |
3396 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3397 | return -EPERM; | |
3398 | } | |
3399 | } | |
3400 | ||
8c6db833 | 3401 | if (delete_root && !only_dirs) |
d4d046e3 | 3402 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
3403 | return -errno; |
3404 | ||
3405 | return 0; | |
3406 | } | |
3407 | ||
f56d5db9 LP |
3408 | if (!dangerous) { |
3409 | if (fstatfs(fd, &s) < 0) { | |
3410 | close_nointr_nofail(fd); | |
3411 | return -errno; | |
3412 | } | |
ad293f5a | 3413 | |
f56d5db9 LP |
3414 | if (s.f_type != TMPFS_MAGIC && |
3415 | s.f_type != RAMFS_MAGIC) { | |
3416 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3417 | close_nointr_nofail(fd); | |
3418 | return -EPERM; | |
3419 | } | |
3420 | } | |
3421 | ||
3422 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
3423 | if (delete_root) { |
3424 | ||
8d53b453 | 3425 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 3426 | return r; |
8c6db833 | 3427 | |
e27796a0 | 3428 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
3429 | if (r == 0) |
3430 | r = -errno; | |
3431 | } | |
ad293f5a | 3432 | } |
8c6db833 LP |
3433 | |
3434 | return r; | |
3435 | } | |
3436 | ||
f56d5db9 LP |
3437 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
3438 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
3439 | } | |
3440 | ||
3441 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
3442 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
3443 | } | |
3444 | ||
8c6db833 LP |
3445 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
3446 | assert(path); | |
3447 | ||
3448 | /* Under the assumption that we are running privileged we | |
3449 | * first change the access mode and only then hand out | |
3450 | * ownership to avoid a window where access is too open. */ | |
3451 | ||
8d53b453 LP |
3452 | if (mode != (mode_t) -1) |
3453 | if (chmod(path, mode) < 0) | |
3454 | return -errno; | |
8c6db833 | 3455 | |
8d53b453 LP |
3456 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
3457 | if (chown(path, uid, gid) < 0) | |
3458 | return -errno; | |
8c6db833 LP |
3459 | |
3460 | return 0; | |
ef2f1067 LP |
3461 | } |
3462 | ||
f4b47811 LP |
3463 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
3464 | assert(fd >= 0); | |
3465 | ||
3466 | /* Under the assumption that we are running privileged we | |
3467 | * first change the access mode and only then hand out | |
3468 | * ownership to avoid a window where access is too open. */ | |
3469 | ||
3470 | if (fchmod(fd, mode) < 0) | |
3471 | return -errno; | |
3472 | ||
3473 | if (fchown(fd, uid, gid) < 0) | |
3474 | return -errno; | |
3475 | ||
3476 | return 0; | |
3477 | } | |
3478 | ||
82c121a4 LP |
3479 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3480 | cpu_set_t *r; | |
3481 | unsigned n = 1024; | |
3482 | ||
3483 | /* Allocates the cpuset in the right size */ | |
3484 | ||
3485 | for (;;) { | |
3486 | if (!(r = CPU_ALLOC(n))) | |
3487 | return NULL; | |
3488 | ||
3489 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3490 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3491 | ||
3492 | if (ncpus) | |
3493 | *ncpus = n; | |
3494 | ||
3495 | return r; | |
3496 | } | |
3497 | ||
3498 | CPU_FREE(r); | |
3499 | ||
3500 | if (errno != EINVAL) | |
3501 | return NULL; | |
3502 | ||
3503 | n *= 2; | |
3504 | } | |
3505 | } | |
3506 | ||
669bec5d | 3507 | int status_vprintf(const char *status, bool ellipse, const char *format, va_list ap) { |
9ab7a8d2 | 3508 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
3509 | _cleanup_free_ char *s = NULL; |
3510 | _cleanup_close_ int fd = -1; | |
81beb750 LP |
3511 | struct iovec iovec[5]; |
3512 | int n = 0; | |
9e58ff9c LP |
3513 | |
3514 | assert(format); | |
3515 | ||
9ab7a8d2 | 3516 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
3517 | * optional and go exclusively to the console. */ |
3518 | ||
3519 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 3520 | return log_oom(); |
9e58ff9c | 3521 | |
67e5cc4f | 3522 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 3523 | if (fd < 0) |
669bec5d | 3524 | return fd; |
9e58ff9c | 3525 | |
67e5cc4f | 3526 | if (ellipse) { |
9ab7a8d2 MS |
3527 | char *e; |
3528 | size_t emax, sl; | |
3529 | int c; | |
3530 | ||
67e5cc4f LP |
3531 | c = fd_columns(fd); |
3532 | if (c <= 0) | |
3533 | c = 80; | |
81beb750 | 3534 | |
669bec5d | 3535 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
3536 | |
3537 | emax = c - sl - 1; | |
3538 | if (emax < 3) | |
3539 | emax = 3; | |
81beb750 | 3540 | |
67e5cc4f LP |
3541 | e = ellipsize(s, emax, 75); |
3542 | if (e) { | |
3543 | free(s); | |
3544 | s = e; | |
3545 | } | |
81beb750 LP |
3546 | } |
3547 | ||
3548 | zero(iovec); | |
81beb750 | 3549 | |
9ab7a8d2 MS |
3550 | if (status) { |
3551 | if (!isempty(status)) { | |
3552 | IOVEC_SET_STRING(iovec[n++], "["); | |
3553 | IOVEC_SET_STRING(iovec[n++], status); | |
3554 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3555 | } else | |
3556 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3557 | } |
3558 | ||
9ab7a8d2 MS |
3559 | IOVEC_SET_STRING(iovec[n++], s); |
3560 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 3561 | |
669bec5d LP |
3562 | if (writev(fd, iovec, n) < 0) |
3563 | return -errno; | |
9e58ff9c | 3564 | |
669bec5d | 3565 | return 0; |
9e58ff9c LP |
3566 | } |
3567 | ||
669bec5d | 3568 | int status_printf(const char *status, bool ellipse, const char *format, ...) { |
c846ff47 | 3569 | va_list ap; |
669bec5d | 3570 | int r; |
c846ff47 LP |
3571 | |
3572 | assert(format); | |
3573 | ||
3574 | va_start(ap, format); | |
669bec5d | 3575 | r = status_vprintf(status, ellipse, format, ap); |
c846ff47 | 3576 | va_end(ap); |
669bec5d LP |
3577 | |
3578 | return r; | |
c846ff47 LP |
3579 | } |
3580 | ||
669bec5d | 3581 | int status_welcome(void) { |
10aa7034 | 3582 | int r; |
669bec5d LP |
3583 | _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL; |
3584 | ||
3585 | r = parse_env_file("/etc/os-release", NEWLINE, | |
3586 | "PRETTY_NAME", &pretty_name, | |
3587 | "ANSI_COLOR", &ansi_color, | |
3588 | NULL); | |
3589 | if (r < 0 && r != -ENOENT) | |
3590 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3591 | ||
3592 | return status_printf(NULL, false, | |
3593 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", | |
3594 | isempty(ansi_color) ? "1" : ansi_color, | |
3595 | isempty(pretty_name) ? "Linux" : pretty_name); | |
c846ff47 LP |
3596 | } |
3597 | ||
fab56fc5 LP |
3598 | char *replace_env(const char *format, char **env) { |
3599 | enum { | |
3600 | WORD, | |
c24eb49e | 3601 | CURLY, |
fab56fc5 LP |
3602 | VARIABLE |
3603 | } state = WORD; | |
3604 | ||
3605 | const char *e, *word = format; | |
3606 | char *r = NULL, *k; | |
3607 | ||
3608 | assert(format); | |
3609 | ||
3610 | for (e = format; *e; e ++) { | |
3611 | ||
3612 | switch (state) { | |
3613 | ||
3614 | case WORD: | |
3615 | if (*e == '$') | |
c24eb49e | 3616 | state = CURLY; |
fab56fc5 LP |
3617 | break; |
3618 | ||
c24eb49e LP |
3619 | case CURLY: |
3620 | if (*e == '{') { | |
fab56fc5 LP |
3621 | if (!(k = strnappend(r, word, e-word-1))) |
3622 | goto fail; | |
3623 | ||
3624 | free(r); | |
3625 | r = k; | |
3626 | ||
3627 | word = e-1; | |
3628 | state = VARIABLE; | |
3629 | ||
3630 | } else if (*e == '$') { | |
3631 | if (!(k = strnappend(r, word, e-word))) | |
3632 | goto fail; | |
3633 | ||
3634 | free(r); | |
3635 | r = k; | |
3636 | ||
3637 | word = e+1; | |
3638 | state = WORD; | |
3639 | } else | |
3640 | state = WORD; | |
3641 | break; | |
3642 | ||
3643 | case VARIABLE: | |
c24eb49e | 3644 | if (*e == '}') { |
b95cf362 | 3645 | const char *t; |
fab56fc5 | 3646 | |
b95cf362 LP |
3647 | if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) |
3648 | t = ""; | |
fab56fc5 | 3649 | |
b95cf362 LP |
3650 | if (!(k = strappend(r, t))) |
3651 | goto fail; | |
fab56fc5 | 3652 | |
b95cf362 LP |
3653 | free(r); |
3654 | r = k; | |
fab56fc5 | 3655 | |
b95cf362 | 3656 | word = e+1; |
fab56fc5 LP |
3657 | state = WORD; |
3658 | } | |
3659 | break; | |
3660 | } | |
3661 | } | |
3662 | ||
3663 | if (!(k = strnappend(r, word, e-word))) | |
3664 | goto fail; | |
3665 | ||
3666 | free(r); | |
3667 | return k; | |
3668 | ||
3669 | fail: | |
3670 | free(r); | |
3671 | return NULL; | |
3672 | } | |
3673 | ||
3674 | char **replace_env_argv(char **argv, char **env) { | |
3675 | char **r, **i; | |
c24eb49e LP |
3676 | unsigned k = 0, l = 0; |
3677 | ||
3678 | l = strv_length(argv); | |
fab56fc5 | 3679 | |
c24eb49e | 3680 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3681 | return NULL; |
3682 | ||
3683 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3684 | |
3685 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3686 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3687 | char *e; | |
3688 | char **w, **m; | |
3689 | unsigned q; | |
c24eb49e | 3690 | |
b95cf362 | 3691 | if ((e = strv_env_get(env, *i+1))) { |
c24eb49e LP |
3692 | |
3693 | if (!(m = strv_split_quoted(e))) { | |
3694 | r[k] = NULL; | |
3695 | strv_free(r); | |
3696 | return NULL; | |
3697 | } | |
b95cf362 LP |
3698 | } else |
3699 | m = NULL; | |
c24eb49e | 3700 | |
b95cf362 LP |
3701 | q = strv_length(m); |
3702 | l = l + q - 1; | |
c24eb49e | 3703 | |
b95cf362 LP |
3704 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3705 | r[k] = NULL; | |
3706 | strv_free(r); | |
3707 | strv_free(m); | |
3708 | return NULL; | |
3709 | } | |
c24eb49e | 3710 | |
b95cf362 LP |
3711 | r = w; |
3712 | if (m) { | |
c24eb49e LP |
3713 | memcpy(r + k, m, q * sizeof(char*)); |
3714 | free(m); | |
c24eb49e | 3715 | } |
b95cf362 LP |
3716 | |
3717 | k += q; | |
3718 | continue; | |
c24eb49e LP |
3719 | } |
3720 | ||
3721 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3722 | if (!(r[k++] = replace_env(*i, env))) { |
3723 | strv_free(r); | |
3724 | return NULL; | |
3725 | } | |
3726 | } | |
3727 | ||
3728 | r[k] = NULL; | |
3729 | return r; | |
3730 | } | |
3731 | ||
81beb750 LP |
3732 | int fd_columns(int fd) { |
3733 | struct winsize ws; | |
3734 | zero(ws); | |
3735 | ||
3736 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3737 | return -errno; | |
3738 | ||
3739 | if (ws.ws_col <= 0) | |
3740 | return -EIO; | |
3741 | ||
3742 | return ws.ws_col; | |
3743 | } | |
3744 | ||
11f96fac | 3745 | static unsigned columns_cached(bool cached) { |
585314e8 | 3746 | static __thread int env_columns = -1; |
fa776d8e LP |
3747 | const char *e; |
3748 | ||
11f96fac | 3749 | if (_likely_(parsed_columns > 0 && cached)) |
fa776d8e LP |
3750 | return parsed_columns; |
3751 | ||
11f96fac ZJS |
3752 | if (_unlikely_(env_columns == -1)) { |
3753 | e = getenv("COLUMNS"); | |
3754 | if (e) | |
3755 | env_columns = atoi(e); | |
3756 | else | |
3757 | env_columns = 0; | |
3758 | } | |
fa776d8e | 3759 | |
11f96fac ZJS |
3760 | if (env_columns > 0) { |
3761 | parsed_columns = env_columns; | |
3762 | return parsed_columns; | |
3763 | } | |
3764 | ||
3765 | if (parsed_columns <= 0 || !cached) | |
81beb750 | 3766 | parsed_columns = fd_columns(STDOUT_FILENO); |
fa776d8e LP |
3767 | |
3768 | if (parsed_columns <= 0) | |
3769 | parsed_columns = 80; | |
3770 | ||
3771 | return parsed_columns; | |
3772 | } | |
3773 | ||
11f96fac ZJS |
3774 | unsigned columns(void) { |
3775 | return columns_cached(true); | |
3776 | } | |
3777 | ||
3778 | unsigned columns_uncached(void) { | |
3779 | return columns_cached(false); | |
3780 | } | |
3781 | ||
585314e8 DR |
3782 | /* intended to be used as a SIGWINCH sighandler */ |
3783 | void columns_cache_reset(int signum) { | |
3784 | parsed_columns = 0; | |
3785 | } | |
3786 | ||
8f2d43a0 LP |
3787 | int fd_lines(int fd) { |
3788 | struct winsize ws; | |
3789 | zero(ws); | |
3790 | ||
3791 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3792 | return -errno; | |
3793 | ||
3794 | if (ws.ws_row <= 0) | |
3795 | return -EIO; | |
3796 | ||
3797 | return ws.ws_row; | |
3798 | } | |
3799 | ||
3800 | unsigned lines(void) { | |
3801 | static __thread int parsed_lines = 0; | |
3802 | const char *e; | |
3803 | ||
3804 | if (_likely_(parsed_lines > 0)) | |
3805 | return parsed_lines; | |
3806 | ||
3807 | e = getenv("LINES"); | |
3808 | if (e) | |
3809 | parsed_lines = atoi(e); | |
3810 | ||
3811 | if (parsed_lines <= 0) | |
3812 | parsed_lines = fd_lines(STDOUT_FILENO); | |
3813 | ||
3814 | if (parsed_lines <= 0) | |
3815 | parsed_lines = 25; | |
3816 | ||
3817 | return parsed_lines; | |
3818 | } | |
3819 | ||
b4f10a5e LP |
3820 | int running_in_chroot(void) { |
3821 | struct stat a, b; | |
3822 | ||
3823 | zero(a); | |
3824 | zero(b); | |
3825 | ||
3826 | /* Only works as root */ | |
3827 | ||
3828 | if (stat("/proc/1/root", &a) < 0) | |
3829 | return -errno; | |
3830 | ||
3831 | if (stat("/", &b) < 0) | |
3832 | return -errno; | |
3833 | ||
3834 | return | |
3835 | a.st_dev != b.st_dev || | |
3836 | a.st_ino != b.st_ino; | |
3837 | } | |
3838 | ||
72f59706 LP |
3839 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3840 | size_t x; | |
8fe914ec LP |
3841 | char *r; |
3842 | ||
3843 | assert(s); | |
3844 | assert(percent <= 100); | |
72f59706 | 3845 | assert(new_length >= 3); |
8fe914ec | 3846 | |
72f59706 LP |
3847 | if (old_length <= 3 || old_length <= new_length) |
3848 | return strndup(s, old_length); | |
8fe914ec | 3849 | |
72f59706 LP |
3850 | r = new0(char, new_length+1); |
3851 | if (!r) | |
8fe914ec LP |
3852 | return r; |
3853 | ||
72f59706 | 3854 | x = (new_length * percent) / 100; |
8fe914ec | 3855 | |
72f59706 LP |
3856 | if (x > new_length - 3) |
3857 | x = new_length - 3; | |
8fe914ec LP |
3858 | |
3859 | memcpy(r, s, x); | |
3860 | r[x] = '.'; | |
3861 | r[x+1] = '.'; | |
3862 | r[x+2] = '.'; | |
3863 | memcpy(r + x + 3, | |
72f59706 LP |
3864 | s + old_length - (new_length - x - 3), |
3865 | new_length - x - 3); | |
8fe914ec LP |
3866 | |
3867 | return r; | |
3868 | } | |
3869 | ||
72f59706 LP |
3870 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3871 | return ellipsize_mem(s, strlen(s), length, percent); | |
3872 | } | |
3873 | ||
f6144808 LP |
3874 | int touch(const char *path) { |
3875 | int fd; | |
3876 | ||
3877 | assert(path); | |
3878 | ||
73836c5c LP |
3879 | /* This just opens the file for writing, ensuring it |
3880 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3881 | * does it. */ | |
3882 | ||
3883 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3884 | if (fd < 0) | |
f6144808 LP |
3885 | return -errno; |
3886 | ||
3887 | close_nointr_nofail(fd); | |
3888 | return 0; | |
3889 | } | |
afea26ad | 3890 | |
97c4a07d | 3891 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3892 | size_t l; |
3893 | assert(s); | |
3894 | ||
73836c5c LP |
3895 | /* This is rather stupid, simply removes the heading and |
3896 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3897 | * escaping or anything. We should make this smarter one |
3898 | * day...*/ | |
73836c5c | 3899 | |
31ed59c5 LP |
3900 | l = strlen(s); |
3901 | if (l < 2) | |
11ce3427 LP |
3902 | return strdup(s); |
3903 | ||
97c4a07d | 3904 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3905 | return strndup(s+1, l-2); |
3906 | ||
3907 | return strdup(s); | |
3908 | } | |
3909 | ||
5f7c426e | 3910 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3911 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3912 | char *eq, *r; | |
5f7c426e | 3913 | |
57f30678 LP |
3914 | eq = strchr(s, '='); |
3915 | if (!eq) { | |
3916 | char *t; | |
5f7c426e | 3917 | |
57f30678 LP |
3918 | r = strdup(s); |
3919 | if (!r) | |
5f7c426e LP |
3920 | return NULL; |
3921 | ||
57f30678 LP |
3922 | t = strstrip(r); |
3923 | if (t == r) | |
3924 | return r; | |
3925 | ||
3926 | memmove(r, t, strlen(t) + 1); | |
3927 | return r; | |
5f7c426e LP |
3928 | } |
3929 | ||
57f30678 LP |
3930 | name = strndup(s, eq - s); |
3931 | if (!name) | |
5f7c426e LP |
3932 | return NULL; |
3933 | ||
57f30678 LP |
3934 | p = strdup(eq + 1); |
3935 | if (!p) | |
5f7c426e | 3936 | return NULL; |
5f7c426e LP |
3937 | |
3938 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3939 | if (!value) |
5f7c426e | 3940 | return NULL; |
5f7c426e | 3941 | |
57f30678 | 3942 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3943 | r = NULL; |
3944 | ||
5f7c426e LP |
3945 | return r; |
3946 | } | |
3947 | ||
8e12a6ae | 3948 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3949 | siginfo_t dummy; |
3950 | ||
2e78aa99 | 3951 | assert(pid >= 1); |
1968a360 LP |
3952 | |
3953 | if (!status) | |
3954 | status = &dummy; | |
2e78aa99 LP |
3955 | |
3956 | for (;;) { | |
8e12a6ae LP |
3957 | zero(*status); |
3958 | ||
3959 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3960 | |
3961 | if (errno == EINTR) | |
3962 | continue; | |
3963 | ||
3964 | return -errno; | |
3965 | } | |
3966 | ||
3967 | return 0; | |
3968 | } | |
3969 | } | |
3970 | ||
97c4a07d LP |
3971 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3972 | int r; | |
3973 | siginfo_t status; | |
3974 | ||
3975 | assert(name); | |
3976 | assert(pid > 1); | |
3977 | ||
d87be9b0 LP |
3978 | r = wait_for_terminate(pid, &status); |
3979 | if (r < 0) { | |
97c4a07d LP |
3980 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3981 | return r; | |
3982 | } | |
3983 | ||
3984 | if (status.si_code == CLD_EXITED) { | |
3985 | if (status.si_status != 0) { | |
3986 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3987 | return status.si_status; |
97c4a07d LP |
3988 | } |
3989 | ||
3990 | log_debug("%s succeeded.", name); | |
3991 | return 0; | |
3992 | ||
3993 | } else if (status.si_code == CLD_KILLED || | |
3994 | status.si_code == CLD_DUMPED) { | |
3995 | ||
3996 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3997 | return -EPROTO; | |
3998 | } | |
3999 | ||
4000 | log_warning("%s failed due to unknown reason.", name); | |
4001 | return -EPROTO; | |
97c4a07d LP |
4002 | } |
4003 | ||
6a39419f | 4004 | _noreturn_ void freeze(void) { |
720ce21d LP |
4005 | |
4006 | /* Make sure nobody waits for us on a socket anymore */ | |
4007 | close_all_fds(NULL, 0); | |
4008 | ||
c29597a1 LP |
4009 | sync(); |
4010 | ||
3c14d26c LP |
4011 | for (;;) |
4012 | pause(); | |
4013 | } | |
4014 | ||
00dc5d76 LP |
4015 | bool null_or_empty(struct stat *st) { |
4016 | assert(st); | |
4017 | ||
4018 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
4019 | return true; | |
4020 | ||
c8f26f42 | 4021 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
4022 | return true; |
4023 | ||
4024 | return false; | |
4025 | } | |
4026 | ||
83096483 LP |
4027 | int null_or_empty_path(const char *fn) { |
4028 | struct stat st; | |
4029 | ||
4030 | assert(fn); | |
4031 | ||
4032 | if (stat(fn, &st) < 0) | |
4033 | return -errno; | |
4034 | ||
4035 | return null_or_empty(&st); | |
4036 | } | |
4037 | ||
a247755d | 4038 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
4039 | int nfd; |
4040 | DIR *d; | |
4041 | ||
73836c5c LP |
4042 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags); |
4043 | if (nfd < 0) | |
c4731d11 LP |
4044 | return NULL; |
4045 | ||
73836c5c LP |
4046 | d = fdopendir(nfd); |
4047 | if (!d) { | |
c4731d11 LP |
4048 | close_nointr_nofail(nfd); |
4049 | return NULL; | |
4050 | } | |
4051 | ||
4052 | return d; | |
3b63d2d3 LP |
4053 | } |
4054 | ||
8a0867d6 LP |
4055 | int signal_from_string_try_harder(const char *s) { |
4056 | int signo; | |
4057 | assert(s); | |
4058 | ||
73836c5c LP |
4059 | signo = signal_from_string(s); |
4060 | if (signo <= 0) | |
8a0867d6 LP |
4061 | if (startswith(s, "SIG")) |
4062 | return signal_from_string(s+3); | |
4063 | ||
4064 | return signo; | |
4065 | } | |
4066 | ||
10717a1a LP |
4067 | void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { |
4068 | ||
4069 | assert(f); | |
4070 | assert(name); | |
4071 | assert(t); | |
4072 | ||
4073 | if (!dual_timestamp_is_set(t)) | |
4074 | return; | |
4075 | ||
4076 | fprintf(f, "%s=%llu %llu\n", | |
4077 | name, | |
4078 | (unsigned long long) t->realtime, | |
4079 | (unsigned long long) t->monotonic); | |
4080 | } | |
4081 | ||
799fd0fd | 4082 | void dual_timestamp_deserialize(const char *value, dual_timestamp *t) { |
10717a1a LP |
4083 | unsigned long long a, b; |
4084 | ||
10717a1a LP |
4085 | assert(value); |
4086 | assert(t); | |
4087 | ||
4088 | if (sscanf(value, "%lli %llu", &a, &b) != 2) | |
4089 | log_debug("Failed to parse finish timestamp value %s", value); | |
4090 | else { | |
4091 | t->realtime = a; | |
4092 | t->monotonic = b; | |
4093 | } | |
4094 | } | |
4095 | ||
383182b5 | 4096 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
e23a0ce8 LP |
4097 | char *dn, *t, *u; |
4098 | int r; | |
4099 | ||
4100 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
4101 | * UTF8 chars unescaped */ | |
4102 | ||
383182b5 DR |
4103 | u = unquote(tagvalue, "\"\'"); |
4104 | if (u == NULL) | |
4105 | return NULL; | |
e23a0ce8 | 4106 | |
383182b5 DR |
4107 | t = xescape(u, "/ "); |
4108 | free(u); | |
e23a0ce8 | 4109 | |
383182b5 DR |
4110 | if (t == NULL) |
4111 | return NULL; | |
e23a0ce8 | 4112 | |
383182b5 DR |
4113 | r = asprintf(&dn, "/dev/disk/by-%s/%s", by, t); |
4114 | free(t); | |
e23a0ce8 | 4115 | |
383182b5 DR |
4116 | if (r < 0) |
4117 | return NULL; | |
e23a0ce8 | 4118 | |
383182b5 DR |
4119 | return dn; |
4120 | } | |
e23a0ce8 | 4121 | |
383182b5 | 4122 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
4123 | assert(p); |
4124 | ||
383182b5 DR |
4125 | if (startswith(p, "LABEL=")) |
4126 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 4127 | |
383182b5 DR |
4128 | if (startswith(p, "UUID=")) |
4129 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 4130 | |
84cc2abf DR |
4131 | if (startswith(p, "PARTUUID=")) |
4132 | return tag_to_udev_node(p+9, "partuuid"); | |
4133 | ||
4134 | if (startswith(p, "PARTLABEL=")) | |
4135 | return tag_to_udev_node(p+10, "partlabel"); | |
4136 | ||
e23a0ce8 LP |
4137 | return strdup(p); |
4138 | } | |
4139 | ||
f212ac12 LP |
4140 | bool tty_is_vc(const char *tty) { |
4141 | assert(tty); | |
4142 | ||
4143 | if (startswith(tty, "/dev/")) | |
4144 | tty += 5; | |
4145 | ||
98a28fef LP |
4146 | return vtnr_from_tty(tty) >= 0; |
4147 | } | |
4148 | ||
d1122ad5 LP |
4149 | bool tty_is_console(const char *tty) { |
4150 | assert(tty); | |
4151 | ||
4152 | if (startswith(tty, "/dev/")) | |
4153 | tty += 5; | |
4154 | ||
4155 | return streq(tty, "console"); | |
4156 | } | |
4157 | ||
98a28fef LP |
4158 | int vtnr_from_tty(const char *tty) { |
4159 | int i, r; | |
4160 | ||
4161 | assert(tty); | |
4162 | ||
4163 | if (startswith(tty, "/dev/")) | |
4164 | tty += 5; | |
4165 | ||
4166 | if (!startswith(tty, "tty") ) | |
4167 | return -EINVAL; | |
4168 | ||
4169 | if (tty[3] < '0' || tty[3] > '9') | |
4170 | return -EINVAL; | |
4171 | ||
4172 | r = safe_atoi(tty+3, &i); | |
4173 | if (r < 0) | |
4174 | return r; | |
4175 | ||
4176 | if (i < 0 || i > 63) | |
4177 | return -EINVAL; | |
4178 | ||
4179 | return i; | |
f212ac12 LP |
4180 | } |
4181 | ||
3043935f | 4182 | bool tty_is_vc_resolve(const char *tty) { |
3030ccd7 | 4183 | char *active = NULL; |
3043935f | 4184 | bool b; |
3030ccd7 | 4185 | |
e3aa71c3 LP |
4186 | assert(tty); |
4187 | ||
4188 | if (startswith(tty, "/dev/")) | |
4189 | tty += 5; | |
4190 | ||
3d9a4122 LP |
4191 | /* Resolve where /dev/console is pointing to, if /sys is |
4192 | * actually ours (i.e. not read-only-mounted which is a sign | |
4193 | * for container setups) */ | |
4194 | if (streq(tty, "console") && path_is_read_only_fs("/sys") <= 0) | |
3030ccd7 | 4195 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { |
079a09fb LP |
4196 | /* If multiple log outputs are configured the |
4197 | * last one is what /dev/console points to */ | |
3043935f LP |
4198 | tty = strrchr(active, ' '); |
4199 | if (tty) | |
079a09fb LP |
4200 | tty++; |
4201 | else | |
4202 | tty = active; | |
3030ccd7 LP |
4203 | } |
4204 | ||
3043935f | 4205 | b = tty_is_vc(tty); |
3030ccd7 | 4206 | free(active); |
e3aa71c3 | 4207 | |
3043935f LP |
4208 | return b; |
4209 | } | |
4210 | ||
4211 | const char *default_term_for_tty(const char *tty) { | |
4212 | assert(tty); | |
4213 | ||
acda6a05 | 4214 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
4215 | } |
4216 | ||
87d2c1ff | 4217 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
4218 | assert(de); |
4219 | ||
4220 | if (ignore_file(de->d_name)) | |
4221 | return false; | |
4222 | ||
4223 | if (de->d_type != DT_REG && | |
4224 | de->d_type != DT_LNK && | |
4225 | de->d_type != DT_UNKNOWN) | |
4226 | return false; | |
4227 | ||
4228 | return true; | |
4229 | } | |
4230 | ||
87d2c1ff LP |
4231 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
4232 | assert(de); | |
4233 | ||
a228a22f LP |
4234 | if (de->d_type != DT_REG && |
4235 | de->d_type != DT_LNK && | |
4236 | de->d_type != DT_UNKNOWN) | |
4237 | return false; | |
4238 | ||
4239 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
4240 | return false; |
4241 | ||
4242 | return endswith(de->d_name, suffix); | |
4243 | } | |
4244 | ||
83cc030f LP |
4245 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
4246 | DIR *_d = NULL; | |
4247 | struct dirent *de; | |
4248 | Hashmap *pids = NULL; | |
4249 | ||
4250 | assert(directory); | |
4251 | ||
4252 | /* Executes all binaries in a directory in parallel and waits | |
4253 | * until all they all finished. */ | |
4254 | ||
4255 | if (!d) { | |
4256 | if (!(_d = opendir(directory))) { | |
4257 | ||
4258 | if (errno == ENOENT) | |
4259 | return; | |
4260 | ||
4261 | log_error("Failed to enumerate directory %s: %m", directory); | |
4262 | return; | |
4263 | } | |
4264 | ||
4265 | d = _d; | |
4266 | } | |
4267 | ||
4268 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
4269 | log_error("Failed to allocate set."); | |
4270 | goto finish; | |
4271 | } | |
4272 | ||
4273 | while ((de = readdir(d))) { | |
4274 | char *path; | |
4275 | pid_t pid; | |
4276 | int k; | |
4277 | ||
fb19a739 | 4278 | if (!dirent_is_file(de)) |
83cc030f LP |
4279 | continue; |
4280 | ||
4281 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 4282 | log_oom(); |
83cc030f LP |
4283 | continue; |
4284 | } | |
4285 | ||
4286 | if ((pid = fork()) < 0) { | |
4287 | log_error("Failed to fork: %m"); | |
4288 | free(path); | |
4289 | continue; | |
4290 | } | |
4291 | ||
4292 | if (pid == 0) { | |
4293 | char *_argv[2]; | |
4294 | /* Child */ | |
4295 | ||
4296 | if (!argv) { | |
4297 | _argv[0] = path; | |
4298 | _argv[1] = NULL; | |
4299 | argv = _argv; | |
4300 | } else | |
6edd7d0a | 4301 | argv[0] = path; |
83cc030f LP |
4302 | |
4303 | execv(path, argv); | |
4304 | ||
4305 | log_error("Failed to execute %s: %m", path); | |
4306 | _exit(EXIT_FAILURE); | |
4307 | } | |
4308 | ||
4309 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
4310 | ||
4311 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
4312 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
4313 | free(path); | |
4314 | } | |
4315 | } | |
4316 | ||
4317 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 4318 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
83cc030f LP |
4319 | siginfo_t si; |
4320 | char *path; | |
4321 | ||
4322 | zero(si); | |
ec3f9b53 | 4323 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
4324 | |
4325 | if (errno == EINTR) | |
4326 | continue; | |
4327 | ||
4328 | log_error("waitid() failed: %m"); | |
4329 | goto finish; | |
4330 | } | |
4331 | ||
4332 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 4333 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
4334 | if (si.si_code == CLD_EXITED) |
4335 | log_error("%s exited with exit status %i.", path, si.si_status); | |
4336 | else | |
4337 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
4338 | } else | |
4339 | log_debug("%s exited successfully.", path); | |
4340 | ||
4341 | free(path); | |
4342 | } | |
4343 | } | |
4344 | ||
4345 | finish: | |
4346 | if (_d) | |
4347 | closedir(_d); | |
4348 | ||
4349 | if (pids) | |
4350 | hashmap_free_free(pids); | |
4351 | } | |
4352 | ||
430c18ed LP |
4353 | int kill_and_sigcont(pid_t pid, int sig) { |
4354 | int r; | |
4355 | ||
4356 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4357 | ||
4358 | if (r >= 0) | |
4359 | kill(pid, SIGCONT); | |
4360 | ||
4361 | return r; | |
4362 | } | |
4363 | ||
05feefe0 LP |
4364 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4365 | const char *i; | |
4366 | ||
4367 | if (!nulstr) | |
4368 | return false; | |
4369 | ||
4370 | NULSTR_FOREACH(i, nulstr) | |
4371 | if (streq(i, needle)) | |
4372 | return true; | |
4373 | ||
4374 | return false; | |
4375 | } | |
4376 | ||
6faa1114 | 4377 | bool plymouth_running(void) { |
9408a2d2 | 4378 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4379 | } |
4380 | ||
9beb3f4d LP |
4381 | char* strshorten(char *s, size_t l) { |
4382 | assert(s); | |
4383 | ||
4384 | if (l < strlen(s)) | |
4385 | s[l] = 0; | |
4386 | ||
4387 | return s; | |
4388 | } | |
4389 | ||
4390 | static bool hostname_valid_char(char c) { | |
4391 | return | |
4392 | (c >= 'a' && c <= 'z') || | |
4393 | (c >= 'A' && c <= 'Z') || | |
4394 | (c >= '0' && c <= '9') || | |
4395 | c == '-' || | |
4396 | c == '_' || | |
4397 | c == '.'; | |
4398 | } | |
4399 | ||
4400 | bool hostname_is_valid(const char *s) { | |
4401 | const char *p; | |
4402 | ||
4403 | if (isempty(s)) | |
4404 | return false; | |
4405 | ||
4406 | for (p = s; *p; p++) | |
4407 | if (!hostname_valid_char(*p)) | |
4408 | return false; | |
4409 | ||
4410 | if (p-s > HOST_NAME_MAX) | |
4411 | return false; | |
4412 | ||
4413 | return true; | |
4414 | } | |
4415 | ||
4416 | char* hostname_cleanup(char *s) { | |
4417 | char *p, *d; | |
4418 | ||
4419 | for (p = s, d = s; *p; p++) | |
4420 | if ((*p >= 'a' && *p <= 'z') || | |
4421 | (*p >= 'A' && *p <= 'Z') || | |
4422 | (*p >= '0' && *p <= '9') || | |
4423 | *p == '-' || | |
4424 | *p == '_' || | |
4425 | *p == '.') | |
4426 | *(d++) = *p; | |
4427 | ||
4428 | *d = 0; | |
4429 | ||
4430 | strshorten(s, HOST_NAME_MAX); | |
4431 | return s; | |
4432 | } | |
4433 | ||
1325aa42 LP |
4434 | int pipe_eof(int fd) { |
4435 | struct pollfd pollfd; | |
4436 | int r; | |
4437 | ||
4438 | zero(pollfd); | |
4439 | pollfd.fd = fd; | |
4440 | pollfd.events = POLLIN|POLLHUP; | |
4441 | ||
4442 | r = poll(&pollfd, 1, 0); | |
4443 | if (r < 0) | |
4444 | return -errno; | |
4445 | ||
4446 | if (r == 0) | |
4447 | return 0; | |
4448 | ||
4449 | return pollfd.revents & POLLHUP; | |
4450 | } | |
4451 | ||
8f2d43a0 | 4452 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b LP |
4453 | struct pollfd pollfd; |
4454 | int r; | |
4455 | ||
4456 | zero(pollfd); | |
4457 | pollfd.fd = fd; | |
4458 | pollfd.events = event; | |
4459 | ||
8f2d43a0 | 4460 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
4461 | if (r < 0) |
4462 | return -errno; | |
4463 | ||
4464 | if (r == 0) | |
4465 | return 0; | |
4466 | ||
4467 | return pollfd.revents; | |
4468 | } | |
4469 | ||
5a3ab509 LP |
4470 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4471 | FILE *f; | |
4472 | char *t; | |
4473 | const char *fn; | |
4474 | size_t k; | |
4475 | int fd; | |
4476 | ||
4477 | assert(path); | |
4478 | assert(_f); | |
4479 | assert(_temp_path); | |
4480 | ||
4481 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4482 | if (!t) | |
4483 | return -ENOMEM; | |
4484 | ||
9eb977db | 4485 | fn = path_get_file_name(path); |
5a3ab509 LP |
4486 | k = fn-path; |
4487 | memcpy(t, path, k); | |
4488 | t[k] = '.'; | |
4489 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4490 | ||
4491 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4492 | if (fd < 0) { | |
4493 | free(t); | |
4494 | return -errno; | |
4495 | } | |
4496 | ||
4497 | f = fdopen(fd, "we"); | |
4498 | if (!f) { | |
4499 | unlink(t); | |
4500 | free(t); | |
4501 | return -errno; | |
4502 | } | |
4503 | ||
4504 | *_f = f; | |
4505 | *_temp_path = t; | |
4506 | ||
4507 | return 0; | |
4508 | } | |
4509 | ||
6ea832a2 | 4510 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4511 | assert(fd >= 0); |
4512 | ||
6ea832a2 LP |
4513 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4514 | return -errno; | |
4515 | ||
4516 | return 0; | |
4517 | } | |
4518 | ||
4519 | int terminal_vhangup(const char *name) { | |
4520 | int fd, r; | |
4521 | ||
4522 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4523 | if (fd < 0) | |
4524 | return fd; | |
4525 | ||
4526 | r = terminal_vhangup_fd(fd); | |
4527 | close_nointr_nofail(fd); | |
4528 | ||
4529 | return r; | |
4530 | } | |
4531 | ||
4532 | int vt_disallocate(const char *name) { | |
4533 | int fd, r; | |
4534 | unsigned u; | |
6ea832a2 LP |
4535 | |
4536 | /* Deallocate the VT if possible. If not possible | |
4537 | * (i.e. because it is the active one), at least clear it | |
4538 | * entirely (including the scrollback buffer) */ | |
4539 | ||
b83bc4e9 LP |
4540 | if (!startswith(name, "/dev/")) |
4541 | return -EINVAL; | |
4542 | ||
4543 | if (!tty_is_vc(name)) { | |
4544 | /* So this is not a VT. I guess we cannot deallocate | |
4545 | * it then. But let's at least clear the screen */ | |
4546 | ||
4547 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4548 | if (fd < 0) | |
4549 | return fd; | |
4550 | ||
8585357a LP |
4551 | loop_write(fd, |
4552 | "\033[r" /* clear scrolling region */ | |
4553 | "\033[H" /* move home */ | |
4554 | "\033[2J", /* clear screen */ | |
4555 | 10, false); | |
b83bc4e9 LP |
4556 | close_nointr_nofail(fd); |
4557 | ||
4558 | return 0; | |
4559 | } | |
6ea832a2 LP |
4560 | |
4561 | if (!startswith(name, "/dev/tty")) | |
4562 | return -EINVAL; | |
4563 | ||
4564 | r = safe_atou(name+8, &u); | |
4565 | if (r < 0) | |
4566 | return r; | |
4567 | ||
4568 | if (u <= 0) | |
b83bc4e9 | 4569 | return -EINVAL; |
6ea832a2 | 4570 | |
b83bc4e9 | 4571 | /* Try to deallocate */ |
6ea832a2 LP |
4572 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4573 | if (fd < 0) | |
4574 | return fd; | |
4575 | ||
4576 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4577 | close_nointr_nofail(fd); |
6ea832a2 | 4578 | |
b83bc4e9 LP |
4579 | if (r >= 0) |
4580 | return 0; | |
6ea832a2 | 4581 | |
b83bc4e9 | 4582 | if (errno != EBUSY) |
6ea832a2 | 4583 | return -errno; |
6ea832a2 | 4584 | |
b83bc4e9 LP |
4585 | /* Couldn't deallocate, so let's clear it fully with |
4586 | * scrollback */ | |
4587 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4588 | if (fd < 0) |
b83bc4e9 | 4589 | return fd; |
6ea832a2 | 4590 | |
8585357a LP |
4591 | loop_write(fd, |
4592 | "\033[r" /* clear scrolling region */ | |
4593 | "\033[H" /* move home */ | |
4594 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4595 | 10, false); | |
b83bc4e9 | 4596 | close_nointr_nofail(fd); |
6ea832a2 | 4597 | |
b83bc4e9 | 4598 | return 0; |
6ea832a2 LP |
4599 | } |
4600 | ||
34ca941c LP |
4601 | int copy_file(const char *from, const char *to) { |
4602 | int r, fdf, fdt; | |
4603 | ||
4604 | assert(from); | |
4605 | assert(to); | |
4606 | ||
4607 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4608 | if (fdf < 0) | |
4609 | return -errno; | |
4610 | ||
4611 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
4612 | if (fdt < 0) { | |
4613 | close_nointr_nofail(fdf); | |
4614 | return -errno; | |
4615 | } | |
4616 | ||
4617 | for (;;) { | |
4618 | char buf[PIPE_BUF]; | |
4619 | ssize_t n, k; | |
4620 | ||
4621 | n = read(fdf, buf, sizeof(buf)); | |
4622 | if (n < 0) { | |
4623 | r = -errno; | |
4624 | ||
4625 | close_nointr_nofail(fdf); | |
4626 | close_nointr(fdt); | |
4627 | unlink(to); | |
4628 | ||
4629 | return r; | |
4630 | } | |
4631 | ||
4632 | if (n == 0) | |
4633 | break; | |
4634 | ||
4635 | errno = 0; | |
4636 | k = loop_write(fdt, buf, n, false); | |
4637 | if (n != k) { | |
4638 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4639 | ||
4640 | close_nointr_nofail(fdf); | |
4641 | close_nointr(fdt); | |
4642 | ||
4643 | unlink(to); | |
4644 | return r; | |
4645 | } | |
4646 | } | |
4647 | ||
4648 | close_nointr_nofail(fdf); | |
4649 | r = close_nointr(fdt); | |
4650 | ||
4651 | if (r < 0) { | |
4652 | unlink(to); | |
4653 | return r; | |
4654 | } | |
4655 | ||
4656 | return 0; | |
4657 | } | |
4658 | ||
424a19f8 LP |
4659 | int symlink_atomic(const char *from, const char *to) { |
4660 | char *x; | |
4661 | _cleanup_free_ char *t; | |
34ca941c LP |
4662 | const char *fn; |
4663 | size_t k; | |
4664 | unsigned long long ull; | |
4665 | unsigned i; | |
4666 | int r; | |
4667 | ||
4668 | assert(from); | |
4669 | assert(to); | |
4670 | ||
4671 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4672 | if (!t) | |
4673 | return -ENOMEM; | |
4674 | ||
9eb977db | 4675 | fn = path_get_file_name(to); |
34ca941c LP |
4676 | k = fn-to; |
4677 | memcpy(t, to, k); | |
4678 | t[k] = '.'; | |
4679 | x = stpcpy(t+k+1, fn); | |
4680 | ||
4681 | ull = random_ull(); | |
4682 | for (i = 0; i < 16; i++) { | |
4683 | *(x++) = hexchar(ull & 0xF); | |
4684 | ull >>= 4; | |
4685 | } | |
4686 | ||
4687 | *x = 0; | |
4688 | ||
424a19f8 LP |
4689 | if (symlink(from, t) < 0) |
4690 | return -errno; | |
34ca941c LP |
4691 | |
4692 | if (rename(t, to) < 0) { | |
4693 | r = -errno; | |
4694 | unlink(t); | |
34ca941c LP |
4695 | return r; |
4696 | } | |
4697 | ||
424a19f8 | 4698 | return 0; |
34ca941c LP |
4699 | } |
4700 | ||
4d6d6518 LP |
4701 | bool display_is_local(const char *display) { |
4702 | assert(display); | |
4703 | ||
4704 | return | |
4705 | display[0] == ':' && | |
4706 | display[1] >= '0' && | |
4707 | display[1] <= '9'; | |
4708 | } | |
4709 | ||
4710 | int socket_from_display(const char *display, char **path) { | |
4711 | size_t k; | |
4712 | char *f, *c; | |
4713 | ||
4714 | assert(display); | |
4715 | assert(path); | |
4716 | ||
4717 | if (!display_is_local(display)) | |
4718 | return -EINVAL; | |
4719 | ||
4720 | k = strspn(display+1, "0123456789"); | |
4721 | ||
4722 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4723 | if (!f) | |
4724 | return -ENOMEM; | |
4725 | ||
4726 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4727 | memcpy(c, display+1, k); | |
4728 | c[k] = 0; | |
4729 | ||
4730 | *path = f; | |
4731 | ||
4732 | return 0; | |
4733 | } | |
4734 | ||
d05c5031 LP |
4735 | int get_user_creds( |
4736 | const char **username, | |
4737 | uid_t *uid, gid_t *gid, | |
4738 | const char **home, | |
4739 | const char **shell) { | |
4740 | ||
1cccf435 | 4741 | struct passwd *p; |
ddd88763 | 4742 | uid_t u; |
1cccf435 MV |
4743 | |
4744 | assert(username); | |
4745 | assert(*username); | |
1cccf435 MV |
4746 | |
4747 | /* We enforce some special rules for uid=0: in order to avoid | |
4748 | * NSS lookups for root we hardcode its data. */ | |
4749 | ||
4750 | if (streq(*username, "root") || streq(*username, "0")) { | |
4751 | *username = "root"; | |
4b67834e LP |
4752 | |
4753 | if (uid) | |
4754 | *uid = 0; | |
4755 | ||
4756 | if (gid) | |
4757 | *gid = 0; | |
4758 | ||
4759 | if (home) | |
4760 | *home = "/root"; | |
d05c5031 LP |
4761 | |
4762 | if (shell) | |
4763 | *shell = "/bin/sh"; | |
4764 | ||
1cccf435 MV |
4765 | return 0; |
4766 | } | |
4767 | ||
ddd88763 | 4768 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4769 | errno = 0; |
ddd88763 | 4770 | p = getpwuid(u); |
1cccf435 MV |
4771 | |
4772 | /* If there are multiple users with the same id, make | |
4773 | * sure to leave $USER to the configured value instead | |
4774 | * of the first occurrence in the database. However if | |
4775 | * the uid was configured by a numeric uid, then let's | |
4776 | * pick the real username from /etc/passwd. */ | |
4777 | if (p) | |
4778 | *username = p->pw_name; | |
4779 | } else { | |
4780 | errno = 0; | |
4781 | p = getpwnam(*username); | |
4782 | } | |
4783 | ||
4784 | if (!p) | |
4785 | return errno != 0 ? -errno : -ESRCH; | |
4786 | ||
4b67834e LP |
4787 | if (uid) |
4788 | *uid = p->pw_uid; | |
4789 | ||
4790 | if (gid) | |
4791 | *gid = p->pw_gid; | |
4792 | ||
4793 | if (home) | |
4794 | *home = p->pw_dir; | |
4795 | ||
d05c5031 LP |
4796 | if (shell) |
4797 | *shell = p->pw_shell; | |
4798 | ||
4b67834e LP |
4799 | return 0; |
4800 | } | |
4801 | ||
4802 | int get_group_creds(const char **groupname, gid_t *gid) { | |
4803 | struct group *g; | |
4804 | gid_t id; | |
4805 | ||
4806 | assert(groupname); | |
4807 | ||
4808 | /* We enforce some special rules for gid=0: in order to avoid | |
4809 | * NSS lookups for root we hardcode its data. */ | |
4810 | ||
4811 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4812 | *groupname = "root"; | |
4813 | ||
4814 | if (gid) | |
4815 | *gid = 0; | |
4816 | ||
4817 | return 0; | |
4818 | } | |
4819 | ||
4820 | if (parse_gid(*groupname, &id) >= 0) { | |
4821 | errno = 0; | |
4822 | g = getgrgid(id); | |
4823 | ||
4824 | if (g) | |
4825 | *groupname = g->gr_name; | |
4826 | } else { | |
4827 | errno = 0; | |
4828 | g = getgrnam(*groupname); | |
4829 | } | |
4830 | ||
4831 | if (!g) | |
4832 | return errno != 0 ? -errno : -ESRCH; | |
4833 | ||
4834 | if (gid) | |
4835 | *gid = g->gr_gid; | |
4836 | ||
1cccf435 MV |
4837 | return 0; |
4838 | } | |
4839 | ||
43673799 LP |
4840 | int in_group(const char *name) { |
4841 | gid_t gid, *gids; | |
4842 | int ngroups_max, r, i; | |
4843 | ||
4844 | r = get_group_creds(&name, &gid); | |
4845 | if (r < 0) | |
4846 | return r; | |
4847 | ||
4848 | if (getgid() == gid) | |
4849 | return 1; | |
4850 | ||
4851 | if (getegid() == gid) | |
4852 | return 1; | |
4853 | ||
4854 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4855 | assert(ngroups_max > 0); | |
4856 | ||
4857 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4858 | ||
4859 | r = getgroups(ngroups_max, gids); | |
4860 | if (r < 0) | |
4861 | return -errno; | |
4862 | ||
4863 | for (i = 0; i < r; i++) | |
4864 | if (gids[i] == gid) | |
4865 | return 1; | |
4866 | ||
4867 | return 0; | |
4868 | } | |
4869 | ||
8092a428 LP |
4870 | int glob_exists(const char *path) { |
4871 | glob_t g; | |
4872 | int r, k; | |
4873 | ||
4874 | assert(path); | |
4875 | ||
4876 | zero(g); | |
4877 | errno = 0; | |
4878 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4879 | ||
4880 | if (k == GLOB_NOMATCH) | |
4881 | r = 0; | |
4882 | else if (k == GLOB_NOSPACE) | |
4883 | r = -ENOMEM; | |
4884 | else if (k == 0) | |
4885 | r = !strv_isempty(g.gl_pathv); | |
4886 | else | |
4887 | r = errno ? -errno : -EIO; | |
4888 | ||
4889 | globfree(&g); | |
4890 | ||
4891 | return r; | |
4892 | } | |
4893 | ||
83096483 LP |
4894 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4895 | struct stat st; | |
4896 | ||
4897 | assert(d); | |
4898 | assert(de); | |
4899 | ||
4900 | if (de->d_type != DT_UNKNOWN) | |
4901 | return 0; | |
4902 | ||
4903 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4904 | return -errno; | |
4905 | ||
4906 | de->d_type = | |
4907 | S_ISREG(st.st_mode) ? DT_REG : | |
4908 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4909 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4910 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4911 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4912 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4913 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4914 | DT_UNKNOWN; | |
4915 | ||
4916 | return 0; | |
4917 | } | |
4918 | ||
4919 | int in_search_path(const char *path, char **search) { | |
4920 | char **i, *parent; | |
4921 | int r; | |
4922 | ||
9eb977db | 4923 | r = path_get_parent(path, &parent); |
83096483 LP |
4924 | if (r < 0) |
4925 | return r; | |
4926 | ||
4927 | r = 0; | |
4928 | ||
4929 | STRV_FOREACH(i, search) { | |
4930 | if (path_equal(parent, *i)) { | |
4931 | r = 1; | |
4932 | break; | |
4933 | } | |
4934 | } | |
4935 | ||
4936 | free(parent); | |
4937 | ||
4938 | return r; | |
4939 | } | |
4940 | ||
034a2a52 LP |
4941 | int get_files_in_directory(const char *path, char ***list) { |
4942 | DIR *d; | |
4943 | int r = 0; | |
4944 | unsigned n = 0; | |
4945 | char **l = NULL; | |
4946 | ||
4947 | assert(path); | |
d60ef526 LP |
4948 | |
4949 | /* Returns all files in a directory in *list, and the number | |
4950 | * of files as return value. If list is NULL returns only the | |
4951 | * number */ | |
034a2a52 LP |
4952 | |
4953 | d = opendir(path); | |
8ea913b2 LP |
4954 | if (!d) |
4955 | return -errno; | |
4956 | ||
034a2a52 | 4957 | for (;;) { |
7d5e9c0f LP |
4958 | struct dirent *de; |
4959 | union dirent_storage buf; | |
034a2a52 LP |
4960 | int k; |
4961 | ||
7d5e9c0f | 4962 | k = readdir_r(d, &buf.de, &de); |
034a2a52 LP |
4963 | if (k != 0) { |
4964 | r = -k; | |
4965 | goto finish; | |
4966 | } | |
4967 | ||
4968 | if (!de) | |
4969 | break; | |
4970 | ||
4971 | dirent_ensure_type(d, de); | |
4972 | ||
4973 | if (!dirent_is_file(de)) | |
4974 | continue; | |
4975 | ||
d60ef526 LP |
4976 | if (list) { |
4977 | if ((unsigned) r >= n) { | |
4978 | char **t; | |
034a2a52 | 4979 | |
d60ef526 LP |
4980 | n = MAX(16, 2*r); |
4981 | t = realloc(l, sizeof(char*) * n); | |
4982 | if (!t) { | |
4983 | r = -ENOMEM; | |
4984 | goto finish; | |
4985 | } | |
034a2a52 | 4986 | |
d60ef526 LP |
4987 | l = t; |
4988 | } | |
034a2a52 | 4989 | |
d60ef526 | 4990 | assert((unsigned) r < n); |
034a2a52 | 4991 | |
d60ef526 LP |
4992 | l[r] = strdup(de->d_name); |
4993 | if (!l[r]) { | |
4994 | r = -ENOMEM; | |
4995 | goto finish; | |
4996 | } | |
034a2a52 | 4997 | |
d60ef526 LP |
4998 | l[++r] = NULL; |
4999 | } else | |
5000 | r++; | |
034a2a52 LP |
5001 | } |
5002 | ||
5003 | finish: | |
5004 | if (d) | |
5005 | closedir(d); | |
5006 | ||
d60ef526 LP |
5007 | if (r >= 0) { |
5008 | if (list) | |
5009 | *list = l; | |
5010 | } else | |
034a2a52 LP |
5011 | strv_free(l); |
5012 | ||
5013 | return r; | |
5014 | } | |
5015 | ||
b7def684 | 5016 | char *strjoin(const char *x, ...) { |
911a4828 LP |
5017 | va_list ap; |
5018 | size_t l; | |
5019 | char *r, *p; | |
5020 | ||
5021 | va_start(ap, x); | |
5022 | ||
5023 | if (x) { | |
5024 | l = strlen(x); | |
5025 | ||
5026 | for (;;) { | |
5027 | const char *t; | |
040f18ea | 5028 | size_t n; |
911a4828 LP |
5029 | |
5030 | t = va_arg(ap, const char *); | |
5031 | if (!t) | |
5032 | break; | |
5033 | ||
040f18ea | 5034 | n = strlen(t); |
e98055de LN |
5035 | if (n > ((size_t) -1) - l) { |
5036 | va_end(ap); | |
040f18ea | 5037 | return NULL; |
e98055de | 5038 | } |
040f18ea LP |
5039 | |
5040 | l += n; | |
911a4828 LP |
5041 | } |
5042 | } else | |
5043 | l = 0; | |
5044 | ||
5045 | va_end(ap); | |
5046 | ||
5047 | r = new(char, l+1); | |
5048 | if (!r) | |
5049 | return NULL; | |
5050 | ||
5051 | if (x) { | |
5052 | p = stpcpy(r, x); | |
5053 | ||
5054 | va_start(ap, x); | |
5055 | ||
5056 | for (;;) { | |
5057 | const char *t; | |
5058 | ||
5059 | t = va_arg(ap, const char *); | |
5060 | if (!t) | |
5061 | break; | |
5062 | ||
5063 | p = stpcpy(p, t); | |
5064 | } | |
8ea913b2 LP |
5065 | |
5066 | va_end(ap); | |
911a4828 LP |
5067 | } else |
5068 | r[0] = 0; | |
5069 | ||
5070 | return r; | |
5071 | } | |
5072 | ||
b636465b LP |
5073 | bool is_main_thread(void) { |
5074 | static __thread int cached = 0; | |
5075 | ||
5076 | if (_unlikely_(cached == 0)) | |
5077 | cached = getpid() == gettid() ? 1 : -1; | |
5078 | ||
5079 | return cached > 0; | |
5080 | } | |
5081 | ||
94959f0f LP |
5082 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
5083 | char *p, *s; | |
5084 | int r; | |
5085 | unsigned n, m; | |
5086 | ||
5087 | assert(ret); | |
5088 | ||
5089 | /* If it has a queue this is good enough for us */ | |
5090 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
5091 | return -ENOMEM; | |
5092 | ||
5093 | r = access(p, F_OK); | |
5094 | free(p); | |
5095 | ||
5096 | if (r >= 0) { | |
5097 | *ret = d; | |
5098 | return 0; | |
5099 | } | |
5100 | ||
5101 | /* If it is a partition find the originating device */ | |
5102 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
5103 | return -ENOMEM; | |
5104 | ||
5105 | r = access(p, F_OK); | |
5106 | free(p); | |
5107 | ||
5108 | if (r < 0) | |
5109 | return -ENOENT; | |
5110 | ||
5111 | /* Get parent dev_t */ | |
5112 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
5113 | return -ENOMEM; | |
5114 | ||
5115 | r = read_one_line_file(p, &s); | |
5116 | free(p); | |
5117 | ||
5118 | if (r < 0) | |
5119 | return r; | |
5120 | ||
5121 | r = sscanf(s, "%u:%u", &m, &n); | |
5122 | free(s); | |
5123 | ||
5124 | if (r != 2) | |
5125 | return -EINVAL; | |
5126 | ||
5127 | /* Only return this if it is really good enough for us. */ | |
5128 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
5129 | return -ENOMEM; | |
5130 | ||
5131 | r = access(p, F_OK); | |
5132 | free(p); | |
5133 | ||
5134 | if (r >= 0) { | |
5135 | *ret = makedev(m, n); | |
5136 | return 0; | |
5137 | } | |
5138 | ||
5139 | return -ENOENT; | |
5140 | } | |
5141 | ||
8d53b453 | 5142 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
5143 | struct stat st; |
5144 | ||
5145 | assert(p); | |
5146 | ||
5147 | if (lstat(p, &st) < 0) | |
5148 | return -errno; | |
5149 | ||
5150 | return | |
8d53b453 | 5151 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
5152 | (st.st_mode & S_ISVTX); |
5153 | } | |
94959f0f | 5154 | |
f41607a6 LP |
5155 | static const char *const ioprio_class_table[] = { |
5156 | [IOPRIO_CLASS_NONE] = "none", | |
5157 | [IOPRIO_CLASS_RT] = "realtime", | |
5158 | [IOPRIO_CLASS_BE] = "best-effort", | |
5159 | [IOPRIO_CLASS_IDLE] = "idle" | |
5160 | }; | |
5161 | ||
5162 | DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int); | |
5163 | ||
5164 | static const char *const sigchld_code_table[] = { | |
5165 | [CLD_EXITED] = "exited", | |
5166 | [CLD_KILLED] = "killed", | |
5167 | [CLD_DUMPED] = "dumped", | |
5168 | [CLD_TRAPPED] = "trapped", | |
5169 | [CLD_STOPPED] = "stopped", | |
5170 | [CLD_CONTINUED] = "continued", | |
5171 | }; | |
5172 | ||
5173 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
5174 | ||
5175 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
5176 | [LOG_FAC(LOG_KERN)] = "kern", | |
5177 | [LOG_FAC(LOG_USER)] = "user", | |
5178 | [LOG_FAC(LOG_MAIL)] = "mail", | |
5179 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
5180 | [LOG_FAC(LOG_AUTH)] = "auth", | |
5181 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
5182 | [LOG_FAC(LOG_LPR)] = "lpr", | |
5183 | [LOG_FAC(LOG_NEWS)] = "news", | |
5184 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
5185 | [LOG_FAC(LOG_CRON)] = "cron", | |
5186 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
5187 | [LOG_FAC(LOG_FTP)] = "ftp", | |
5188 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
5189 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
5190 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
5191 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
5192 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
5193 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
5194 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
5195 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
5196 | }; | |
5197 | ||
5198 | DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int); | |
5199 | ||
5200 | static const char *const log_level_table[] = { | |
5201 | [LOG_EMERG] = "emerg", | |
5202 | [LOG_ALERT] = "alert", | |
5203 | [LOG_CRIT] = "crit", | |
5204 | [LOG_ERR] = "err", | |
5205 | [LOG_WARNING] = "warning", | |
5206 | [LOG_NOTICE] = "notice", | |
5207 | [LOG_INFO] = "info", | |
5208 | [LOG_DEBUG] = "debug" | |
5209 | }; | |
5210 | ||
5211 | DEFINE_STRING_TABLE_LOOKUP(log_level, int); | |
5212 | ||
5213 | static const char* const sched_policy_table[] = { | |
5214 | [SCHED_OTHER] = "other", | |
5215 | [SCHED_BATCH] = "batch", | |
5216 | [SCHED_IDLE] = "idle", | |
5217 | [SCHED_FIFO] = "fifo", | |
5218 | [SCHED_RR] = "rr" | |
5219 | }; | |
5220 | ||
5221 | DEFINE_STRING_TABLE_LOOKUP(sched_policy, int); | |
5222 | ||
5223 | static const char* const rlimit_table[] = { | |
5224 | [RLIMIT_CPU] = "LimitCPU", | |
5225 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
5226 | [RLIMIT_DATA] = "LimitDATA", | |
5227 | [RLIMIT_STACK] = "LimitSTACK", | |
5228 | [RLIMIT_CORE] = "LimitCORE", | |
5229 | [RLIMIT_RSS] = "LimitRSS", | |
5230 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
5231 | [RLIMIT_AS] = "LimitAS", | |
5232 | [RLIMIT_NPROC] = "LimitNPROC", | |
5233 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
5234 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
5235 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
5236 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
5237 | [RLIMIT_NICE] = "LimitNICE", | |
5238 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
5239 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
5240 | }; | |
5241 | ||
5242 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
5243 | ||
5244 | static const char* const ip_tos_table[] = { | |
5245 | [IPTOS_LOWDELAY] = "low-delay", | |
5246 | [IPTOS_THROUGHPUT] = "throughput", | |
5247 | [IPTOS_RELIABILITY] = "reliability", | |
5248 | [IPTOS_LOWCOST] = "low-cost", | |
5249 | }; | |
5250 | ||
5251 | DEFINE_STRING_TABLE_LOOKUP(ip_tos, int); | |
5252 | ||
4e240ab0 | 5253 | static const char *const __signal_table[] = { |
f41607a6 LP |
5254 | [SIGHUP] = "HUP", |
5255 | [SIGINT] = "INT", | |
5256 | [SIGQUIT] = "QUIT", | |
5257 | [SIGILL] = "ILL", | |
5258 | [SIGTRAP] = "TRAP", | |
5259 | [SIGABRT] = "ABRT", | |
5260 | [SIGBUS] = "BUS", | |
5261 | [SIGFPE] = "FPE", | |
5262 | [SIGKILL] = "KILL", | |
5263 | [SIGUSR1] = "USR1", | |
5264 | [SIGSEGV] = "SEGV", | |
5265 | [SIGUSR2] = "USR2", | |
5266 | [SIGPIPE] = "PIPE", | |
5267 | [SIGALRM] = "ALRM", | |
5268 | [SIGTERM] = "TERM", | |
5269 | #ifdef SIGSTKFLT | |
5270 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
5271 | #endif | |
5272 | [SIGCHLD] = "CHLD", | |
5273 | [SIGCONT] = "CONT", | |
5274 | [SIGSTOP] = "STOP", | |
5275 | [SIGTSTP] = "TSTP", | |
5276 | [SIGTTIN] = "TTIN", | |
5277 | [SIGTTOU] = "TTOU", | |
5278 | [SIGURG] = "URG", | |
5279 | [SIGXCPU] = "XCPU", | |
5280 | [SIGXFSZ] = "XFSZ", | |
5281 | [SIGVTALRM] = "VTALRM", | |
5282 | [SIGPROF] = "PROF", | |
5283 | [SIGWINCH] = "WINCH", | |
5284 | [SIGIO] = "IO", | |
5285 | [SIGPWR] = "PWR", | |
5286 | [SIGSYS] = "SYS" | |
5287 | }; | |
5288 | ||
4e240ab0 MS |
5289 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
5290 | ||
5291 | const char *signal_to_string(int signo) { | |
5292 | static __thread char buf[12]; | |
5293 | const char *name; | |
5294 | ||
5295 | name = __signal_to_string(signo); | |
5296 | if (name) | |
5297 | return name; | |
5298 | ||
5299 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
5300 | snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN); | |
5301 | else | |
5302 | snprintf(buf, sizeof(buf) - 1, "%d", signo); | |
5303 | char_array_0(buf); | |
5304 | return buf; | |
5305 | } | |
5306 | ||
5307 | int signal_from_string(const char *s) { | |
5308 | int signo; | |
5309 | int offset = 0; | |
5310 | unsigned u; | |
5311 | ||
040f18ea | 5312 | signo = __signal_from_string(s); |
4e240ab0 MS |
5313 | if (signo > 0) |
5314 | return signo; | |
5315 | ||
5316 | if (startswith(s, "RTMIN+")) { | |
5317 | s += 6; | |
5318 | offset = SIGRTMIN; | |
5319 | } | |
5320 | if (safe_atou(s, &u) >= 0) { | |
5321 | signo = (int) u + offset; | |
5322 | if (signo > 0 && signo < _NSIG) | |
5323 | return signo; | |
5324 | } | |
5325 | return -1; | |
5326 | } | |
65457142 FC |
5327 | |
5328 | bool kexec_loaded(void) { | |
5329 | bool loaded = false; | |
5330 | char *s; | |
5331 | ||
5332 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
5333 | if (s[0] == '1') | |
5334 | loaded = true; | |
5335 | free(s); | |
5336 | } | |
5337 | return loaded; | |
5338 | } | |
fb9de93d LP |
5339 | |
5340 | int strdup_or_null(const char *a, char **b) { | |
5341 | char *c; | |
5342 | ||
5343 | assert(b); | |
5344 | ||
5345 | if (!a) { | |
5346 | *b = NULL; | |
5347 | return 0; | |
5348 | } | |
5349 | ||
5350 | c = strdup(a); | |
5351 | if (!c) | |
5352 | return -ENOMEM; | |
5353 | ||
5354 | *b = c; | |
5355 | return 0; | |
5356 | } | |
64685e0c | 5357 | |
87d2c1ff LP |
5358 | int prot_from_flags(int flags) { |
5359 | ||
5360 | switch (flags & O_ACCMODE) { | |
5361 | ||
5362 | case O_RDONLY: | |
5363 | return PROT_READ; | |
5364 | ||
5365 | case O_WRONLY: | |
5366 | return PROT_WRITE; | |
5367 | ||
5368 | case O_RDWR: | |
5369 | return PROT_READ|PROT_WRITE; | |
5370 | ||
5371 | default: | |
5372 | return -EINVAL; | |
5373 | } | |
7c99e0c1 | 5374 | } |
689b9a22 | 5375 | |
babfc091 | 5376 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 5377 | unsigned i; |
babfc091 LP |
5378 | |
5379 | static const struct { | |
5380 | const char *suffix; | |
5381 | off_t factor; | |
5382 | } table[] = { | |
32895bb3 LP |
5383 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
5384 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
5385 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
5386 | { "G", 1024ULL*1024ULL*1024ULL }, | |
5387 | { "M", 1024ULL*1024ULL }, | |
5388 | { "K", 1024ULL }, | |
5389 | }; | |
5390 | ||
5391 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
5392 | ||
5393 | if (t >= table[i].factor) { | |
5394 | snprintf(buf, l, | |
5395 | "%llu.%llu%s", | |
5396 | (unsigned long long) (t / table[i].factor), | |
5397 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
5398 | table[i].suffix); | |
5399 | ||
5400 | goto finish; | |
5401 | } | |
5402 | } | |
5403 | ||
5404 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
5405 | ||
5406 | finish: | |
5407 | buf[l-1] = 0; | |
5408 | return buf; | |
5409 | ||
5410 | } | |
55d7bfc1 LP |
5411 | |
5412 | void* memdup(const void *p, size_t l) { | |
5413 | void *r; | |
5414 | ||
5415 | assert(p); | |
5416 | ||
5417 | r = malloc(l); | |
5418 | if (!r) | |
5419 | return NULL; | |
5420 | ||
5421 | memcpy(r, p, l); | |
5422 | return r; | |
5423 | } | |
bb99a35a LP |
5424 | |
5425 | int fd_inc_sndbuf(int fd, size_t n) { | |
5426 | int r, value; | |
5427 | socklen_t l = sizeof(value); | |
5428 | ||
5429 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
5430 | if (r >= 0 && | |
5431 | l == sizeof(value) && | |
5432 | (size_t) value >= n*2) | |
5433 | return 0; | |
5434 | ||
5435 | value = (int) n; | |
5436 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
5437 | if (r < 0) | |
5438 | return -errno; | |
5439 | ||
5440 | return 1; | |
5441 | } | |
5442 | ||
5443 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5444 | int r, value; | |
5445 | socklen_t l = sizeof(value); | |
5446 | ||
5447 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
5448 | if (r >= 0 && | |
5449 | l == sizeof(value) && | |
5450 | (size_t) value >= n*2) | |
5451 | return 0; | |
5452 | ||
5453 | value = (int) n; | |
5454 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
5455 | if (r < 0) | |
5456 | return -errno; | |
5457 | ||
5458 | return 1; | |
5459 | } | |
6bb92a16 | 5460 | |
9bdc770c | 5461 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
5462 | pid_t parent_pid, agent_pid; |
5463 | int fd; | |
5464 | bool stdout_is_tty, stderr_is_tty; | |
5465 | unsigned n, i; | |
5466 | va_list ap; | |
5467 | char **l; | |
5468 | ||
5469 | assert(pid); | |
5470 | assert(path); | |
5471 | ||
5472 | parent_pid = getpid(); | |
5473 | ||
5474 | /* Spawns a temporary TTY agent, making sure it goes away when | |
5475 | * we go away */ | |
5476 | ||
5477 | agent_pid = fork(); | |
5478 | if (agent_pid < 0) | |
5479 | return -errno; | |
5480 | ||
5481 | if (agent_pid != 0) { | |
5482 | *pid = agent_pid; | |
5483 | return 0; | |
5484 | } | |
5485 | ||
5486 | /* In the child: | |
5487 | * | |
5488 | * Make sure the agent goes away when the parent dies */ | |
5489 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5490 | _exit(EXIT_FAILURE); | |
5491 | ||
5492 | /* Check whether our parent died before we were able | |
5493 | * to set the death signal */ | |
5494 | if (getppid() != parent_pid) | |
5495 | _exit(EXIT_SUCCESS); | |
5496 | ||
5497 | /* Don't leak fds to the agent */ | |
9bdc770c | 5498 | close_all_fds(except, n_except); |
6bb92a16 LP |
5499 | |
5500 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5501 | stderr_is_tty = isatty(STDERR_FILENO); | |
5502 | ||
5503 | if (!stdout_is_tty || !stderr_is_tty) { | |
5504 | /* Detach from stdout/stderr. and reopen | |
5505 | * /dev/tty for them. This is important to | |
5506 | * ensure that when systemctl is started via | |
5507 | * popen() or a similar call that expects to | |
5508 | * read EOF we actually do generate EOF and | |
5509 | * not delay this indefinitely by because we | |
5510 | * keep an unused copy of stdin around. */ | |
5511 | fd = open("/dev/tty", O_WRONLY); | |
5512 | if (fd < 0) { | |
5513 | log_error("Failed to open /dev/tty: %m"); | |
5514 | _exit(EXIT_FAILURE); | |
5515 | } | |
5516 | ||
5517 | if (!stdout_is_tty) | |
5518 | dup2(fd, STDOUT_FILENO); | |
5519 | ||
5520 | if (!stderr_is_tty) | |
5521 | dup2(fd, STDERR_FILENO); | |
5522 | ||
5523 | if (fd > 2) | |
5524 | close(fd); | |
5525 | } | |
5526 | ||
5527 | /* Count arguments */ | |
5528 | va_start(ap, path); | |
5529 | for (n = 0; va_arg(ap, char*); n++) | |
5530 | ; | |
5531 | va_end(ap); | |
5532 | ||
5533 | /* Allocate strv */ | |
5534 | l = alloca(sizeof(char *) * (n + 1)); | |
5535 | ||
5536 | /* Fill in arguments */ | |
5537 | va_start(ap, path); | |
5538 | for (i = 0; i <= n; i++) | |
5539 | l[i] = va_arg(ap, char*); | |
5540 | va_end(ap); | |
5541 | ||
5542 | execv(path, l); | |
5543 | _exit(EXIT_FAILURE); | |
5544 | } | |
68faf98c LP |
5545 | |
5546 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5547 | struct rlimit highest, fixed; | |
5548 | ||
5549 | assert(rlim); | |
5550 | ||
5551 | if (setrlimit(resource, rlim) >= 0) | |
5552 | return 0; | |
5553 | ||
5554 | if (errno != EPERM) | |
5555 | return -errno; | |
5556 | ||
5557 | /* So we failed to set the desired setrlimit, then let's try | |
5558 | * to get as close as we can */ | |
5559 | assert_se(getrlimit(resource, &highest) == 0); | |
5560 | ||
5561 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5562 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5563 | ||
5564 | if (setrlimit(resource, &fixed) < 0) | |
5565 | return -errno; | |
5566 | ||
5567 | return 0; | |
5568 | } | |
3d9a4122 | 5569 | |
ab94af92 LP |
5570 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
5571 | char path[sizeof("/proc/")-1+10+sizeof("/environ")], *value = NULL; | |
5572 | int r; | |
5573 | FILE *f; | |
5574 | bool done = false; | |
5575 | size_t l; | |
5576 | ||
5577 | assert(field); | |
5578 | assert(_value); | |
5579 | ||
5580 | if (pid == 0) | |
5581 | pid = getpid(); | |
5582 | ||
5583 | snprintf(path, sizeof(path), "/proc/%lu/environ", (unsigned long) pid); | |
5584 | char_array_0(path); | |
5585 | ||
5586 | f = fopen(path, "re"); | |
5587 | if (!f) | |
5588 | return -errno; | |
5589 | ||
5590 | l = strlen(field); | |
5591 | r = 0; | |
5592 | ||
5593 | do { | |
5594 | char line[LINE_MAX]; | |
5595 | unsigned i; | |
5596 | ||
5597 | for (i = 0; i < sizeof(line)-1; i++) { | |
5598 | int c; | |
5599 | ||
5600 | c = getc(f); | |
5601 | if (_unlikely_(c == EOF)) { | |
5602 | done = true; | |
5603 | break; | |
5604 | } else if (c == 0) | |
5605 | break; | |
5606 | ||
5607 | line[i] = c; | |
5608 | } | |
5609 | line[i] = 0; | |
5610 | ||
5611 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5612 | value = strdup(line + l + 1); | |
5613 | if (!value) { | |
5614 | r = -ENOMEM; | |
5615 | break; | |
5616 | } | |
5617 | ||
5618 | r = 1; | |
5619 | break; | |
5620 | } | |
5621 | ||
5622 | } while (!done); | |
5623 | ||
5624 | fclose(f); | |
5625 | ||
5626 | if (r >= 0) | |
5627 | *_value = value; | |
5628 | ||
5629 | return r; | |
5630 | } | |
d889a206 LP |
5631 | |
5632 | int can_sleep(const char *type) { | |
e67f47e5 | 5633 | char *w, *state; |
d889a206 | 5634 | size_t l, k; |
d889a206 | 5635 | int r; |
e67f47e5 | 5636 | _cleanup_free_ char *p = NULL; |
d889a206 LP |
5637 | |
5638 | assert(type); | |
5639 | ||
5640 | r = read_one_line_file("/sys/power/state", &p); | |
5641 | if (r < 0) | |
5642 | return r == -ENOENT ? 0 : r; | |
5643 | ||
5644 | k = strlen(type); | |
e67f47e5 LP |
5645 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) |
5646 | if (l == k && memcmp(w, type, l) == 0) | |
5647 | return true; | |
d889a206 | 5648 | |
e67f47e5 | 5649 | return false; |
d889a206 | 5650 | } |
49dbfa7b LP |
5651 | |
5652 | bool is_valid_documentation_url(const char *url) { | |
5653 | assert(url); | |
5654 | ||
5655 | if (startswith(url, "http://") && url[7]) | |
5656 | return true; | |
5657 | ||
5658 | if (startswith(url, "https://") && url[8]) | |
5659 | return true; | |
5660 | ||
5661 | if (startswith(url, "file:") && url[5]) | |
5662 | return true; | |
5663 | ||
5664 | if (startswith(url, "info:") && url[5]) | |
5665 | return true; | |
5666 | ||
5667 | if (startswith(url, "man:") && url[4]) | |
5668 | return true; | |
5669 | ||
5670 | return false; | |
5671 | } | |
9be346c9 HH |
5672 | |
5673 | bool in_initrd(void) { | |
a05f97b3 | 5674 | static __thread int saved = -1; |
825c6fe5 | 5675 | struct statfs s; |
8f33b5b8 | 5676 | |
825c6fe5 LP |
5677 | if (saved >= 0) |
5678 | return saved; | |
5679 | ||
5680 | /* We make two checks here: | |
5681 | * | |
5682 | * 1. the flag file /etc/initrd-release must exist | |
5683 | * 2. the root file system must be a memory file system | |
5684 | * | |
5685 | * The second check is extra paranoia, since misdetecting an | |
5686 | * initrd can have bad bad consequences due the initrd | |
5687 | * emptying when transititioning to the main systemd. | |
5688 | */ | |
5689 | ||
5690 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5691 | statfs("/", &s) >= 0 && | |
5692 | (s.f_type == TMPFS_MAGIC || s.f_type == RAMFS_MAGIC); | |
9be346c9 | 5693 | |
8f33b5b8 | 5694 | return saved; |
9be346c9 | 5695 | } |
069cfc85 LP |
5696 | |
5697 | void warn_melody(void) { | |
e67f47e5 | 5698 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5699 | |
5700 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5701 | if (fd < 0) | |
5702 | return; | |
5703 | ||
040f18ea | 5704 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5705 | |
5706 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5707 | usleep(125*USEC_PER_MSEC); | |
5708 | ||
5709 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5710 | usleep(125*USEC_PER_MSEC); | |
5711 | ||
5712 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5713 | usleep(125*USEC_PER_MSEC); | |
5714 | ||
5715 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5716 | } |
cd3bd60a LP |
5717 | |
5718 | int make_console_stdio(void) { | |
5719 | int fd, r; | |
5720 | ||
5721 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5722 | ||
5723 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5724 | if (fd < 0) { | |
5725 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5726 | return fd; | |
5727 | } | |
5728 | ||
5729 | r = make_stdio(fd); | |
5730 | if (r < 0) { | |
5731 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5732 | return r; | |
5733 | } | |
5734 | ||
5735 | return 0; | |
5736 | } | |
7c5f152a LP |
5737 | |
5738 | int get_home_dir(char **_h) { | |
5739 | char *h; | |
5740 | const char *e; | |
5741 | uid_t u; | |
5742 | struct passwd *p; | |
5743 | ||
5744 | assert(_h); | |
5745 | ||
5746 | /* Take the user specified one */ | |
5747 | e = getenv("HOME"); | |
5748 | if (e) { | |
5749 | h = strdup(e); | |
5750 | if (!h) | |
5751 | return -ENOMEM; | |
5752 | ||
5753 | *_h = h; | |
5754 | return 0; | |
5755 | } | |
5756 | ||
5757 | /* Hardcode home directory for root to avoid NSS */ | |
5758 | u = getuid(); | |
5759 | if (u == 0) { | |
5760 | h = strdup("/root"); | |
5761 | if (!h) | |
5762 | return -ENOMEM; | |
5763 | ||
5764 | *_h = h; | |
5765 | return 0; | |
5766 | } | |
5767 | ||
5768 | /* Check the database... */ | |
5769 | errno = 0; | |
5770 | p = getpwuid(u); | |
5771 | if (!p) | |
e67f47e5 | 5772 | return errno ? -errno : -ESRCH; |
7c5f152a LP |
5773 | |
5774 | if (!path_is_absolute(p->pw_dir)) | |
5775 | return -EINVAL; | |
5776 | ||
5777 | h = strdup(p->pw_dir); | |
5778 | if (!h) | |
5779 | return -ENOMEM; | |
5780 | ||
5781 | *_h = h; | |
5782 | return 0; | |
5783 | } | |
5784 | ||
5785 | int get_shell(char **_sh) { | |
5786 | char *sh; | |
5787 | const char *e; | |
5788 | uid_t u; | |
5789 | struct passwd *p; | |
5790 | ||
5791 | assert(_sh); | |
5792 | ||
5793 | /* Take the user specified one */ | |
5794 | e = getenv("SHELL"); | |
5795 | if (e) { | |
5796 | sh = strdup(e); | |
5797 | if (!sh) | |
5798 | return -ENOMEM; | |
5799 | ||
5800 | *_sh = sh; | |
5801 | return 0; | |
5802 | } | |
5803 | ||
5804 | /* Hardcode home directory for root to avoid NSS */ | |
5805 | u = getuid(); | |
5806 | if (u == 0) { | |
5807 | sh = strdup("/bin/sh"); | |
5808 | if (!sh) | |
5809 | return -ENOMEM; | |
5810 | ||
5811 | *_sh = sh; | |
5812 | return 0; | |
5813 | } | |
5814 | ||
5815 | /* Check the database... */ | |
5816 | errno = 0; | |
5817 | p = getpwuid(u); | |
5818 | if (!p) | |
5819 | return errno ? -errno : -ESRCH; | |
5820 | ||
5821 | if (!path_is_absolute(p->pw_shell)) | |
5822 | return -EINVAL; | |
5823 | ||
5824 | sh = strdup(p->pw_shell); | |
5825 | if (!sh) | |
5826 | return -ENOMEM; | |
5827 | ||
5828 | *_sh = sh; | |
5829 | return 0; | |
5830 | } | |
2fbe635a LP |
5831 | |
5832 | void freep(void *p) { | |
5833 | free(*(void**) p); | |
5834 | } | |
5835 | ||
5836 | void fclosep(FILE **f) { | |
5837 | if (*f) | |
5838 | fclose(*f); | |
5839 | } | |
e67f47e5 LP |
5840 | |
5841 | void closep(int *fd) { | |
5842 | if (*fd >= 0) | |
5843 | close_nointr_nofail(*fd); | |
5844 | } | |
a05f97b3 LP |
5845 | |
5846 | void closedirp(DIR **d) { | |
5847 | if (*d) | |
5848 | closedir(*d); | |
5849 | } | |
25ea79fe ZJS |
5850 | |
5851 | void umaskp(mode_t *u) { | |
5852 | umask(*u); | |
5853 | } |