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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> | |
0b507b17 | 59 | #include <limits.h> |
60918275 LP |
60 | |
61 | #include "macro.h" | |
62 | #include "util.h" | |
1dccbe19 LP |
63 | #include "ioprio.h" |
64 | #include "missing.h" | |
a9f5d454 | 65 | #include "log.h" |
65d2ebdc | 66 | #include "strv.h" |
e51bc1a2 | 67 | #include "label.h" |
9eb977db | 68 | #include "path-util.h" |
d06dacd0 | 69 | #include "exit-status.h" |
83cc030f | 70 | #include "hashmap.h" |
56cf987f | 71 | |
9a0e6896 LP |
72 | int saved_argc = 0; |
73 | char **saved_argv = NULL; | |
9086e840 | 74 | |
28917d7d | 75 | static volatile unsigned cached_columns = 0; |
ed757c0c | 76 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 77 | |
37f85e66 | 78 | size_t page_size(void) { |
79 | static __thread size_t pgsz = 0; | |
80 | long r; | |
81 | ||
87d2c1ff | 82 | if (_likely_(pgsz > 0)) |
37f85e66 | 83 | return pgsz; |
84 | ||
e67f47e5 LP |
85 | r = sysconf(_SC_PAGESIZE); |
86 | assert(r > 0); | |
37f85e66 | 87 | |
88 | pgsz = (size_t) r; | |
37f85e66 | 89 | return pgsz; |
90 | } | |
91 | ||
e05797fb LP |
92 | bool streq_ptr(const char *a, const char *b) { |
93 | ||
94 | /* Like streq(), but tries to make sense of NULL pointers */ | |
95 | ||
96 | if (a && b) | |
97 | return streq(a, b); | |
98 | ||
99 | if (!a && !b) | |
100 | return true; | |
101 | ||
102 | return false; | |
103 | } | |
104 | ||
47be870b | 105 | usec_t now(clockid_t clock_id) { |
60918275 LP |
106 | struct timespec ts; |
107 | ||
47be870b | 108 | assert_se(clock_gettime(clock_id, &ts) == 0); |
60918275 LP |
109 | |
110 | return timespec_load(&ts); | |
111 | } | |
112 | ||
63983207 | 113 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { |
871d7de4 LP |
114 | assert(ts); |
115 | ||
116 | ts->realtime = now(CLOCK_REALTIME); | |
117 | ts->monotonic = now(CLOCK_MONOTONIC); | |
118 | ||
119 | return ts; | |
120 | } | |
121 | ||
a185c5aa LP |
122 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) { |
123 | int64_t delta; | |
124 | assert(ts); | |
125 | ||
126 | ts->realtime = u; | |
127 | ||
128 | if (u == 0) | |
129 | ts->monotonic = 0; | |
130 | else { | |
131 | delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; | |
132 | ||
133 | ts->monotonic = now(CLOCK_MONOTONIC); | |
134 | ||
135 | if ((int64_t) ts->monotonic > delta) | |
136 | ts->monotonic -= delta; | |
137 | else | |
138 | ts->monotonic = 0; | |
139 | } | |
140 | ||
141 | return ts; | |
142 | } | |
143 | ||
60918275 LP |
144 | usec_t timespec_load(const struct timespec *ts) { |
145 | assert(ts); | |
146 | ||
b1c80623 LP |
147 | if (ts->tv_sec == (time_t) -1 && |
148 | ts->tv_nsec == (long) -1) | |
149 | return (usec_t) -1; | |
150 | ||
60918275 LP |
151 | return |
152 | (usec_t) ts->tv_sec * USEC_PER_SEC + | |
153 | (usec_t) ts->tv_nsec / NSEC_PER_USEC; | |
154 | } | |
155 | ||
156 | struct timespec *timespec_store(struct timespec *ts, usec_t u) { | |
157 | assert(ts); | |
158 | ||
b1c80623 LP |
159 | if (u == (usec_t) -1) { |
160 | ts->tv_sec = (time_t) -1; | |
161 | ts->tv_nsec = (long) -1; | |
162 | return ts; | |
163 | } | |
164 | ||
60918275 LP |
165 | ts->tv_sec = (time_t) (u / USEC_PER_SEC); |
166 | ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); | |
167 | ||
168 | return ts; | |
169 | } | |
170 | ||
171 | usec_t timeval_load(const struct timeval *tv) { | |
172 | assert(tv); | |
173 | ||
b1c80623 LP |
174 | if (tv->tv_sec == (time_t) -1 && |
175 | tv->tv_usec == (suseconds_t) -1) | |
176 | return (usec_t) -1; | |
177 | ||
60918275 LP |
178 | return |
179 | (usec_t) tv->tv_sec * USEC_PER_SEC + | |
180 | (usec_t) tv->tv_usec; | |
181 | } | |
182 | ||
183 | struct timeval *timeval_store(struct timeval *tv, usec_t u) { | |
184 | assert(tv); | |
185 | ||
b1c80623 LP |
186 | if (u == (usec_t) -1) { |
187 | tv->tv_sec = (time_t) -1; | |
188 | tv->tv_usec = (suseconds_t) -1; | |
189 | return tv; | |
190 | } | |
191 | ||
60918275 LP |
192 | tv->tv_sec = (time_t) (u / USEC_PER_SEC); |
193 | tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); | |
194 | ||
195 | return tv; | |
196 | } | |
197 | ||
198 | bool endswith(const char *s, const char *postfix) { | |
199 | size_t sl, pl; | |
200 | ||
201 | assert(s); | |
202 | assert(postfix); | |
203 | ||
204 | sl = strlen(s); | |
205 | pl = strlen(postfix); | |
206 | ||
d4d0d4db LP |
207 | if (pl == 0) |
208 | return true; | |
209 | ||
60918275 LP |
210 | if (sl < pl) |
211 | return false; | |
212 | ||
213 | return memcmp(s + sl - pl, postfix, pl) == 0; | |
214 | } | |
215 | ||
216 | bool startswith(const char *s, const char *prefix) { | |
217 | size_t sl, pl; | |
218 | ||
219 | assert(s); | |
220 | assert(prefix); | |
221 | ||
222 | sl = strlen(s); | |
223 | pl = strlen(prefix); | |
224 | ||
d4d0d4db LP |
225 | if (pl == 0) |
226 | return true; | |
227 | ||
60918275 LP |
228 | if (sl < pl) |
229 | return false; | |
230 | ||
231 | return memcmp(s, prefix, pl) == 0; | |
232 | } | |
233 | ||
3177a7fa MAP |
234 | bool startswith_no_case(const char *s, const char *prefix) { |
235 | size_t sl, pl; | |
236 | unsigned i; | |
237 | ||
238 | assert(s); | |
239 | assert(prefix); | |
240 | ||
241 | sl = strlen(s); | |
242 | pl = strlen(prefix); | |
243 | ||
244 | if (pl == 0) | |
245 | return true; | |
246 | ||
247 | if (sl < pl) | |
248 | return false; | |
249 | ||
e67f47e5 | 250 | for(i = 0; i < pl; ++i) |
3177a7fa MAP |
251 | if (tolower(s[i]) != tolower(prefix[i])) |
252 | return false; | |
3177a7fa MAP |
253 | |
254 | return true; | |
255 | } | |
256 | ||
79d6d816 LP |
257 | bool first_word(const char *s, const char *word) { |
258 | size_t sl, wl; | |
259 | ||
260 | assert(s); | |
261 | assert(word); | |
262 | ||
263 | sl = strlen(s); | |
264 | wl = strlen(word); | |
265 | ||
266 | if (sl < wl) | |
267 | return false; | |
268 | ||
d4d0d4db LP |
269 | if (wl == 0) |
270 | return true; | |
271 | ||
79d6d816 LP |
272 | if (memcmp(s, word, wl) != 0) |
273 | return false; | |
274 | ||
d4d0d4db LP |
275 | return s[wl] == 0 || |
276 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
277 | } |
278 | ||
42f4e3c4 | 279 | int close_nointr(int fd) { |
60918275 LP |
280 | assert(fd >= 0); |
281 | ||
282 | for (;;) { | |
283 | int r; | |
284 | ||
48f82119 LP |
285 | r = close(fd); |
286 | if (r >= 0) | |
60918275 LP |
287 | return r; |
288 | ||
289 | if (errno != EINTR) | |
48f82119 | 290 | return -errno; |
60918275 LP |
291 | } |
292 | } | |
85261803 | 293 | |
85f136b5 | 294 | void close_nointr_nofail(int fd) { |
80876c20 | 295 | int saved_errno = errno; |
85f136b5 LP |
296 | |
297 | /* like close_nointr() but cannot fail, and guarantees errno | |
298 | * is unchanged */ | |
299 | ||
300 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
301 | |
302 | errno = saved_errno; | |
85f136b5 LP |
303 | } |
304 | ||
5b6319dc LP |
305 | void close_many(const int fds[], unsigned n_fd) { |
306 | unsigned i; | |
307 | ||
308 | for (i = 0; i < n_fd; i++) | |
309 | close_nointr_nofail(fds[i]); | |
310 | } | |
311 | ||
85261803 LP |
312 | int parse_boolean(const char *v) { |
313 | assert(v); | |
314 | ||
44d8db9e | 315 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on")) |
85261803 | 316 | return 1; |
44d8db9e | 317 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off")) |
85261803 LP |
318 | return 0; |
319 | ||
320 | return -EINVAL; | |
321 | } | |
322 | ||
3ba686c1 | 323 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 324 | unsigned long ul = 0; |
3ba686c1 LP |
325 | pid_t pid; |
326 | int r; | |
327 | ||
328 | assert(s); | |
329 | assert(ret_pid); | |
330 | ||
e67f47e5 LP |
331 | r = safe_atolu(s, &ul); |
332 | if (r < 0) | |
3ba686c1 LP |
333 | return r; |
334 | ||
335 | pid = (pid_t) ul; | |
336 | ||
337 | if ((unsigned long) pid != ul) | |
338 | return -ERANGE; | |
339 | ||
340 | if (pid <= 0) | |
341 | return -ERANGE; | |
342 | ||
343 | *ret_pid = pid; | |
344 | return 0; | |
345 | } | |
346 | ||
034a2a52 LP |
347 | int parse_uid(const char *s, uid_t* ret_uid) { |
348 | unsigned long ul = 0; | |
349 | uid_t uid; | |
350 | int r; | |
351 | ||
352 | assert(s); | |
353 | assert(ret_uid); | |
354 | ||
e67f47e5 LP |
355 | r = safe_atolu(s, &ul); |
356 | if (r < 0) | |
034a2a52 LP |
357 | return r; |
358 | ||
359 | uid = (uid_t) ul; | |
360 | ||
361 | if ((unsigned long) uid != ul) | |
362 | return -ERANGE; | |
363 | ||
364 | *ret_uid = uid; | |
365 | return 0; | |
366 | } | |
367 | ||
85261803 LP |
368 | int safe_atou(const char *s, unsigned *ret_u) { |
369 | char *x = NULL; | |
034c6ed7 | 370 | unsigned long l; |
85261803 LP |
371 | |
372 | assert(s); | |
373 | assert(ret_u); | |
374 | ||
375 | errno = 0; | |
376 | l = strtoul(s, &x, 0); | |
377 | ||
378 | if (!x || *x || errno) | |
379 | return errno ? -errno : -EINVAL; | |
380 | ||
034c6ed7 | 381 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
382 | return -ERANGE; |
383 | ||
384 | *ret_u = (unsigned) l; | |
385 | return 0; | |
386 | } | |
387 | ||
388 | int safe_atoi(const char *s, int *ret_i) { | |
389 | char *x = NULL; | |
034c6ed7 | 390 | long l; |
85261803 LP |
391 | |
392 | assert(s); | |
393 | assert(ret_i); | |
394 | ||
395 | errno = 0; | |
396 | l = strtol(s, &x, 0); | |
397 | ||
398 | if (!x || *x || errno) | |
399 | return errno ? -errno : -EINVAL; | |
400 | ||
034c6ed7 | 401 | if ((long) (int) l != l) |
85261803 LP |
402 | return -ERANGE; |
403 | ||
034c6ed7 LP |
404 | *ret_i = (int) l; |
405 | return 0; | |
406 | } | |
407 | ||
034c6ed7 LP |
408 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
409 | char *x = NULL; | |
410 | unsigned long long l; | |
411 | ||
412 | assert(s); | |
413 | assert(ret_llu); | |
414 | ||
415 | errno = 0; | |
416 | l = strtoull(s, &x, 0); | |
417 | ||
418 | if (!x || *x || errno) | |
419 | return errno ? -errno : -EINVAL; | |
420 | ||
421 | *ret_llu = l; | |
422 | return 0; | |
423 | } | |
424 | ||
425 | int safe_atolli(const char *s, long long int *ret_lli) { | |
426 | char *x = NULL; | |
427 | long long l; | |
428 | ||
429 | assert(s); | |
430 | assert(ret_lli); | |
431 | ||
432 | errno = 0; | |
433 | l = strtoll(s, &x, 0); | |
434 | ||
435 | if (!x || *x || errno) | |
436 | return errno ? -errno : -EINVAL; | |
437 | ||
438 | *ret_lli = l; | |
85261803 LP |
439 | return 0; |
440 | } | |
a41e8209 | 441 | |
a41e8209 | 442 | /* Split a string into words. */ |
65d2ebdc | 443 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
444 | char *current; |
445 | ||
446 | current = *state ? *state : (char*) c; | |
447 | ||
448 | if (!*current || *c == 0) | |
449 | return NULL; | |
450 | ||
65d2ebdc LP |
451 | current += strspn(current, separator); |
452 | *l = strcspn(current, separator); | |
82919e3d LP |
453 | *state = current+*l; |
454 | ||
455 | return (char*) current; | |
456 | } | |
457 | ||
034c6ed7 LP |
458 | /* Split a string into words, but consider strings enclosed in '' and |
459 | * "" as words even if they include spaces. */ | |
460 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
461 | char *current, *e; |
462 | bool escaped = false; | |
034c6ed7 LP |
463 | |
464 | current = *state ? *state : (char*) c; | |
465 | ||
466 | if (!*current || *c == 0) | |
467 | return NULL; | |
468 | ||
469 | current += strspn(current, WHITESPACE); | |
470 | ||
471 | if (*current == '\'') { | |
472 | current ++; | |
034c6ed7 | 473 | |
0bab36f2 LP |
474 | for (e = current; *e; e++) { |
475 | if (escaped) | |
476 | escaped = false; | |
477 | else if (*e == '\\') | |
478 | escaped = true; | |
479 | else if (*e == '\'') | |
480 | break; | |
481 | } | |
482 | ||
483 | *l = e-current; | |
484 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
485 | } else if (*current == '\"') { |
486 | current ++; | |
034c6ed7 | 487 | |
0bab36f2 LP |
488 | for (e = current; *e; e++) { |
489 | if (escaped) | |
490 | escaped = false; | |
491 | else if (*e == '\\') | |
492 | escaped = true; | |
493 | else if (*e == '\"') | |
494 | break; | |
495 | } | |
496 | ||
497 | *l = e-current; | |
498 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 499 | } else { |
0bab36f2 LP |
500 | for (e = current; *e; e++) { |
501 | if (escaped) | |
502 | escaped = false; | |
503 | else if (*e == '\\') | |
504 | escaped = true; | |
505 | else if (strchr(WHITESPACE, *e)) | |
506 | break; | |
507 | } | |
508 | *l = e-current; | |
509 | *state = e; | |
034c6ed7 LP |
510 | } |
511 | ||
512 | return (char*) current; | |
513 | } | |
514 | ||
034c6ed7 LP |
515 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
516 | int r; | |
2fbe635a | 517 | _cleanup_fclose_ FILE *f = NULL; |
20c03b7b | 518 | char fn[PATH_MAX], line[LINE_MAX], *p; |
bb00e604 | 519 | long unsigned ppid; |
034c6ed7 | 520 | |
8480e784 | 521 | assert(pid > 0); |
034c6ed7 LP |
522 | assert(_ppid); |
523 | ||
bb00e604 | 524 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
8480e784 | 525 | char_array_0(fn); |
034c6ed7 | 526 | |
2fbe635a LP |
527 | f = fopen(fn, "re"); |
528 | if (!f) | |
034c6ed7 LP |
529 | return -errno; |
530 | ||
2fbe635a | 531 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 532 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
533 | fclose(f); |
534 | return r; | |
535 | } | |
536 | ||
034c6ed7 LP |
537 | /* Let's skip the pid and comm fields. The latter is enclosed |
538 | * in () but does not escape any () in its value, so let's | |
539 | * skip over it manually */ | |
540 | ||
2fbe635a LP |
541 | p = strrchr(line, ')'); |
542 | if (!p) | |
034c6ed7 LP |
543 | return -EIO; |
544 | ||
545 | p++; | |
546 | ||
547 | if (sscanf(p, " " | |
548 | "%*c " /* state */ | |
bb00e604 | 549 | "%lu ", /* ppid */ |
034c6ed7 LP |
550 | &ppid) != 1) |
551 | return -EIO; | |
552 | ||
bb00e604 | 553 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
554 | return -ERANGE; |
555 | ||
556 | *_ppid = (pid_t) ppid; | |
557 | ||
558 | return 0; | |
559 | } | |
560 | ||
7640a5de | 561 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
e67f47e5 | 562 | _cleanup_fclose_ FILE *f = NULL; |
7640a5de LP |
563 | char fn[PATH_MAX], line[LINE_MAX], *p; |
564 | ||
565 | assert(pid > 0); | |
566 | assert(st); | |
567 | ||
568 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); | |
569 | char_array_0(fn); | |
570 | ||
e67f47e5 LP |
571 | f = fopen(fn, "re"); |
572 | if (!f) | |
7640a5de LP |
573 | return -errno; |
574 | ||
e67f47e5 LP |
575 | if (!fgets(line, sizeof(line), f)) { |
576 | if (ferror(f)) | |
577 | return -errno; | |
7640a5de | 578 | |
e67f47e5 LP |
579 | return -EIO; |
580 | } | |
7640a5de LP |
581 | |
582 | /* Let's skip the pid and comm fields. The latter is enclosed | |
583 | * in () but does not escape any () in its value, so let's | |
584 | * skip over it manually */ | |
585 | ||
e67f47e5 LP |
586 | p = strrchr(line, ')'); |
587 | if (!p) | |
7640a5de LP |
588 | return -EIO; |
589 | ||
590 | p++; | |
591 | ||
592 | if (sscanf(p, " " | |
593 | "%*c " /* state */ | |
594 | "%*d " /* ppid */ | |
595 | "%*d " /* pgrp */ | |
596 | "%*d " /* session */ | |
597 | "%*d " /* tty_nr */ | |
598 | "%*d " /* tpgid */ | |
599 | "%*u " /* flags */ | |
600 | "%*u " /* minflt */ | |
601 | "%*u " /* cminflt */ | |
602 | "%*u " /* majflt */ | |
603 | "%*u " /* cmajflt */ | |
604 | "%*u " /* utime */ | |
605 | "%*u " /* stime */ | |
606 | "%*d " /* cutime */ | |
607 | "%*d " /* cstime */ | |
608 | "%*d " /* priority */ | |
609 | "%*d " /* nice */ | |
610 | "%*d " /* num_threads */ | |
611 | "%*d " /* itrealvalue */ | |
612 | "%llu " /* starttime */, | |
613 | st) != 1) | |
614 | return -EIO; | |
615 | ||
616 | return 0; | |
617 | } | |
618 | ||
034c6ed7 | 619 | int write_one_line_file(const char *fn, const char *line) { |
e67f47e5 | 620 | _cleanup_fclose_ FILE *f = NULL; |
034c6ed7 LP |
621 | |
622 | assert(fn); | |
623 | assert(line); | |
624 | ||
03ad1136 LP |
625 | f = fopen(fn, "we"); |
626 | if (!f) | |
034c6ed7 LP |
627 | return -errno; |
628 | ||
34ca941c | 629 | errno = 0; |
e67f47e5 LP |
630 | if (fputs(line, f) < 0) |
631 | return errno ? -errno : -EIO; | |
034c6ed7 | 632 | |
8e1bd70d LP |
633 | if (!endswith(line, "\n")) |
634 | fputc('\n', f); | |
635 | ||
151b190e LP |
636 | fflush(f); |
637 | ||
e67f47e5 LP |
638 | if (ferror(f)) |
639 | return errno ? -errno : -EIO; | |
151b190e | 640 | |
e67f47e5 | 641 | return 0; |
034c6ed7 LP |
642 | } |
643 | ||
34ca941c LP |
644 | int fchmod_umask(int fd, mode_t m) { |
645 | mode_t u; | |
646 | int r; | |
647 | ||
648 | u = umask(0777); | |
649 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
650 | umask(u); | |
651 | ||
652 | return r; | |
653 | } | |
654 | ||
655 | int write_one_line_file_atomic(const char *fn, const char *line) { | |
656 | FILE *f; | |
657 | int r; | |
658 | char *p; | |
659 | ||
660 | assert(fn); | |
661 | assert(line); | |
662 | ||
663 | r = fopen_temporary(fn, &f, &p); | |
664 | if (r < 0) | |
665 | return r; | |
666 | ||
667 | fchmod_umask(fileno(f), 0644); | |
668 | ||
669 | errno = 0; | |
670 | if (fputs(line, f) < 0) { | |
671 | r = -errno; | |
672 | goto finish; | |
673 | } | |
674 | ||
675 | if (!endswith(line, "\n")) | |
676 | fputc('\n', f); | |
677 | ||
678 | fflush(f); | |
679 | ||
680 | if (ferror(f)) { | |
681 | if (errno != 0) | |
682 | r = -errno; | |
683 | else | |
684 | r = -EIO; | |
685 | } else { | |
686 | if (rename(p, fn) < 0) | |
687 | r = -errno; | |
688 | else | |
689 | r = 0; | |
690 | } | |
691 | ||
692 | finish: | |
693 | if (r < 0) | |
694 | unlink(p); | |
695 | ||
696 | fclose(f); | |
697 | free(p); | |
698 | ||
699 | return r; | |
700 | } | |
701 | ||
034c6ed7 | 702 | int read_one_line_file(const char *fn, char **line) { |
2fbe635a | 703 | _cleanup_fclose_ FILE *f = NULL; |
97c4a07d | 704 | char t[LINE_MAX], *c; |
034c6ed7 LP |
705 | |
706 | assert(fn); | |
707 | assert(line); | |
708 | ||
4099a281 LP |
709 | f = fopen(fn, "re"); |
710 | if (!f) | |
034c6ed7 LP |
711 | return -errno; |
712 | ||
4099a281 LP |
713 | if (!fgets(t, sizeof(t), f)) { |
714 | ||
2fbe635a | 715 | if (ferror(f)) |
e67f47e5 | 716 | return errno ? -errno : -EIO; |
4099a281 LP |
717 | |
718 | t[0] = 0; | |
034c6ed7 LP |
719 | } |
720 | ||
4099a281 | 721 | c = strdup(t); |
2fbe635a LP |
722 | if (!c) |
723 | return -ENOMEM; | |
6f9a471a LP |
724 | truncate_nl(c); |
725 | ||
034c6ed7 | 726 | *line = c; |
2fbe635a | 727 | return 0; |
034c6ed7 | 728 | } |
44d8db9e | 729 | |
34ca941c | 730 | int read_full_file(const char *fn, char **contents, size_t *size) { |
2fbe635a | 731 | _cleanup_fclose_ FILE *f = NULL; |
97c4a07d | 732 | size_t n, l; |
2fbe635a | 733 | _cleanup_free_ char *buf = NULL; |
97c4a07d LP |
734 | struct stat st; |
735 | ||
2fbe635a LP |
736 | f = fopen(fn, "re"); |
737 | if (!f) | |
97c4a07d LP |
738 | return -errno; |
739 | ||
2fbe635a LP |
740 | if (fstat(fileno(f), &st) < 0) |
741 | return -errno; | |
97c4a07d | 742 | |
34ca941c | 743 | /* Safety check */ |
2fbe635a LP |
744 | if (st.st_size > 4*1024*1024) |
745 | return -E2BIG; | |
34ca941c | 746 | |
97c4a07d LP |
747 | n = st.st_size > 0 ? st.st_size : LINE_MAX; |
748 | l = 0; | |
749 | ||
750 | for (;;) { | |
751 | char *t; | |
752 | size_t k; | |
753 | ||
2fbe635a LP |
754 | t = realloc(buf, n+1); |
755 | if (!t) | |
756 | return -ENOMEM; | |
97c4a07d LP |
757 | |
758 | buf = t; | |
759 | k = fread(buf + l, 1, n - l, f); | |
760 | ||
761 | if (k <= 0) { | |
2fbe635a LP |
762 | if (ferror(f)) |
763 | return -errno; | |
97c4a07d LP |
764 | |
765 | break; | |
766 | } | |
767 | ||
768 | l += k; | |
769 | n *= 2; | |
770 | ||
771 | /* Safety check */ | |
2fbe635a LP |
772 | if (n > 4*1024*1024) |
773 | return -E2BIG; | |
97c4a07d LP |
774 | } |
775 | ||
f8440af5 | 776 | buf[l] = 0; |
97c4a07d LP |
777 | *contents = buf; |
778 | buf = NULL; | |
779 | ||
34ca941c LP |
780 | if (size) |
781 | *size = l; | |
782 | ||
2fbe635a | 783 | return 0; |
97c4a07d LP |
784 | } |
785 | ||
786 | int parse_env_file( | |
787 | const char *fname, | |
c899f8c6 | 788 | const char *separator, ...) { |
97c4a07d | 789 | |
ce8a6aa1 | 790 | int r = 0; |
44d91056 | 791 | char *contents = NULL, *p; |
97c4a07d LP |
792 | |
793 | assert(fname); | |
c899f8c6 | 794 | assert(separator); |
97c4a07d | 795 | |
34ca941c | 796 | if ((r = read_full_file(fname, &contents, NULL)) < 0) |
97c4a07d LP |
797 | return r; |
798 | ||
799 | p = contents; | |
800 | for (;;) { | |
801 | const char *key = NULL; | |
802 | ||
c899f8c6 | 803 | p += strspn(p, separator); |
97c4a07d LP |
804 | p += strspn(p, WHITESPACE); |
805 | ||
806 | if (!*p) | |
807 | break; | |
808 | ||
809 | if (!strchr(COMMENTS, *p)) { | |
810 | va_list ap; | |
811 | char **value; | |
812 | ||
c899f8c6 | 813 | va_start(ap, separator); |
97c4a07d LP |
814 | while ((key = va_arg(ap, char *))) { |
815 | size_t n; | |
816 | char *v; | |
817 | ||
818 | value = va_arg(ap, char **); | |
819 | ||
820 | n = strlen(key); | |
821 | if (strncmp(p, key, n) != 0 || | |
822 | p[n] != '=') | |
823 | continue; | |
824 | ||
825 | p += n + 1; | |
c899f8c6 | 826 | n = strcspn(p, separator); |
97c4a07d LP |
827 | |
828 | if (n >= 2 && | |
e7db37dd LP |
829 | strchr(QUOTES, p[0]) && |
830 | p[n-1] == p[0]) | |
97c4a07d LP |
831 | v = strndup(p+1, n-2); |
832 | else | |
833 | v = strndup(p, n); | |
834 | ||
835 | if (!v) { | |
836 | r = -ENOMEM; | |
837 | va_end(ap); | |
838 | goto fail; | |
839 | } | |
840 | ||
dd36de4d KS |
841 | if (v[0] == '\0') { |
842 | /* return empty value strings as NULL */ | |
843 | free(v); | |
844 | v = NULL; | |
845 | } | |
846 | ||
97c4a07d LP |
847 | free(*value); |
848 | *value = v; | |
849 | ||
850 | p += n; | |
ce8a6aa1 LP |
851 | |
852 | r ++; | |
97c4a07d LP |
853 | break; |
854 | } | |
855 | va_end(ap); | |
856 | } | |
857 | ||
858 | if (!key) | |
c899f8c6 | 859 | p += strcspn(p, separator); |
97c4a07d LP |
860 | } |
861 | ||
97c4a07d LP |
862 | fail: |
863 | free(contents); | |
864 | return r; | |
865 | } | |
866 | ||
8c7be95e LP |
867 | int load_env_file( |
868 | const char *fname, | |
869 | char ***rl) { | |
870 | ||
871 | FILE *f; | |
6a39419f | 872 | char **m = NULL; |
8c7be95e LP |
873 | int r; |
874 | ||
875 | assert(fname); | |
876 | assert(rl); | |
877 | ||
878 | if (!(f = fopen(fname, "re"))) | |
879 | return -errno; | |
880 | ||
881 | while (!feof(f)) { | |
882 | char l[LINE_MAX], *p, *u; | |
883 | char **t; | |
884 | ||
885 | if (!fgets(l, sizeof(l), f)) { | |
886 | if (feof(f)) | |
887 | break; | |
888 | ||
889 | r = -errno; | |
890 | goto finish; | |
891 | } | |
892 | ||
893 | p = strstrip(l); | |
894 | ||
895 | if (!*p) | |
896 | continue; | |
897 | ||
898 | if (strchr(COMMENTS, *p)) | |
899 | continue; | |
900 | ||
901 | if (!(u = normalize_env_assignment(p))) { | |
0d0f0c50 | 902 | r = log_oom(); |
8c7be95e LP |
903 | goto finish; |
904 | } | |
905 | ||
906 | t = strv_append(m, u); | |
907 | free(u); | |
908 | ||
909 | if (!t) { | |
0d0f0c50 | 910 | r = log_oom(); |
8c7be95e LP |
911 | goto finish; |
912 | } | |
913 | ||
914 | strv_free(m); | |
915 | m = t; | |
916 | } | |
917 | ||
918 | r = 0; | |
919 | ||
920 | *rl = m; | |
921 | m = NULL; | |
922 | ||
923 | finish: | |
924 | if (f) | |
925 | fclose(f); | |
926 | ||
927 | strv_free(m); | |
928 | ||
929 | return r; | |
930 | } | |
931 | ||
7640a5de | 932 | int write_env_file(const char *fname, char **l) { |
34ca941c | 933 | char **i, *p; |
7640a5de LP |
934 | FILE *f; |
935 | int r; | |
936 | ||
34ca941c LP |
937 | r = fopen_temporary(fname, &f, &p); |
938 | if (r < 0) | |
939 | return r; | |
7640a5de | 940 | |
34ca941c LP |
941 | fchmod_umask(fileno(f), 0644); |
942 | ||
943 | errno = 0; | |
7640a5de LP |
944 | STRV_FOREACH(i, l) { |
945 | fputs(*i, f); | |
946 | fputc('\n', f); | |
947 | } | |
948 | ||
949 | fflush(f); | |
950 | ||
34ca941c LP |
951 | if (ferror(f)) { |
952 | if (errno != 0) | |
953 | r = -errno; | |
954 | else | |
955 | r = -EIO; | |
956 | } else { | |
957 | if (rename(p, fname) < 0) | |
958 | r = -errno; | |
959 | else | |
960 | r = 0; | |
961 | } | |
962 | ||
963 | if (r < 0) | |
964 | unlink(p); | |
965 | ||
7640a5de | 966 | fclose(f); |
34ca941c | 967 | free(p); |
7640a5de LP |
968 | |
969 | return r; | |
970 | } | |
971 | ||
7072ced8 LP |
972 | char *truncate_nl(char *s) { |
973 | assert(s); | |
974 | ||
975 | s[strcspn(s, NEWLINE)] = 0; | |
976 | return s; | |
977 | } | |
978 | ||
87d2c1ff | 979 | int get_process_comm(pid_t pid, char **name) { |
7072ced8 LP |
980 | int r; |
981 | ||
7072ced8 LP |
982 | assert(name); |
983 | ||
87d2c1ff LP |
984 | if (pid == 0) |
985 | r = read_one_line_file("/proc/self/comm", name); | |
986 | else { | |
987 | char *p; | |
988 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) | |
989 | return -ENOMEM; | |
7072ced8 | 990 | |
87d2c1ff LP |
991 | r = read_one_line_file(p, name); |
992 | free(p); | |
993 | } | |
7072ced8 | 994 | |
87d2c1ff | 995 | return r; |
7072ced8 LP |
996 | } |
997 | ||
87d2c1ff LP |
998 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
999 | char *r, *k; | |
c59760ee LP |
1000 | int c; |
1001 | bool space = false; | |
1002 | size_t left; | |
1003 | FILE *f; | |
1004 | ||
c59760ee LP |
1005 | assert(max_length > 0); |
1006 | assert(line); | |
1007 | ||
87d2c1ff LP |
1008 | if (pid == 0) |
1009 | f = fopen("/proc/self/cmdline", "re"); | |
1010 | else { | |
1011 | char *p; | |
1012 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1013 | return -ENOMEM; | |
c59760ee | 1014 | |
87d2c1ff LP |
1015 | f = fopen(p, "re"); |
1016 | free(p); | |
1017 | } | |
c59760ee LP |
1018 | |
1019 | if (!f) | |
1020 | return -errno; | |
1021 | ||
87d2c1ff LP |
1022 | r = new(char, max_length); |
1023 | if (!r) { | |
c59760ee LP |
1024 | fclose(f); |
1025 | return -ENOMEM; | |
1026 | } | |
1027 | ||
1028 | k = r; | |
1029 | left = max_length; | |
1030 | while ((c = getc(f)) != EOF) { | |
1031 | ||
1032 | if (isprint(c)) { | |
1033 | if (space) { | |
1034 | if (left <= 4) | |
1035 | break; | |
1036 | ||
1037 | *(k++) = ' '; | |
057fbb58 | 1038 | left--; |
c59760ee LP |
1039 | space = false; |
1040 | } | |
1041 | ||
1042 | if (left <= 4) | |
1043 | break; | |
1044 | ||
1045 | *(k++) = (char) c; | |
057fbb58 | 1046 | left--; |
c59760ee LP |
1047 | } else |
1048 | space = true; | |
1049 | } | |
1050 | ||
1051 | if (left <= 4) { | |
1052 | size_t n = MIN(left-1, 3U); | |
1053 | memcpy(k, "...", n); | |
1054 | k[n] = 0; | |
1055 | } else | |
1056 | *k = 0; | |
1057 | ||
1058 | fclose(f); | |
1059 | ||
35d2e7ec LP |
1060 | /* Kernel threads have no argv[] */ |
1061 | if (r[0] == 0) { | |
1062 | char *t; | |
1063 | int h; | |
1064 | ||
1065 | free(r); | |
1066 | ||
87d2c1ff LP |
1067 | if (!comm_fallback) |
1068 | return -ENOENT; | |
1069 | ||
1070 | h = get_process_comm(pid, &t); | |
1071 | if (h < 0) | |
35d2e7ec LP |
1072 | return h; |
1073 | ||
b7def684 | 1074 | r = strjoin("[", t, "]", NULL); |
35d2e7ec LP |
1075 | free(t); |
1076 | ||
87d2c1ff | 1077 | if (!r) |
35d2e7ec LP |
1078 | return -ENOMEM; |
1079 | } | |
fa776d8e | 1080 | |
c59760ee LP |
1081 | *line = r; |
1082 | return 0; | |
1083 | } | |
1084 | ||
1e5678d0 LP |
1085 | int is_kernel_thread(pid_t pid) { |
1086 | char *p; | |
1087 | size_t count; | |
1088 | char c; | |
1089 | bool eof; | |
1090 | FILE *f; | |
1091 | ||
1092 | if (pid == 0) | |
1093 | return 0; | |
1094 | ||
1095 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1096 | return -ENOMEM; | |
1097 | ||
1098 | f = fopen(p, "re"); | |
1099 | free(p); | |
1100 | ||
1101 | if (!f) | |
1102 | return -errno; | |
1103 | ||
1104 | count = fread(&c, 1, 1, f); | |
1105 | eof = feof(f); | |
1106 | fclose(f); | |
1107 | ||
1108 | /* Kernel threads have an empty cmdline */ | |
1109 | ||
1110 | if (count <= 0) | |
1111 | return eof ? 1 : -errno; | |
1112 | ||
1113 | return 0; | |
1114 | } | |
1115 | ||
87d2c1ff LP |
1116 | int get_process_exe(pid_t pid, char **name) { |
1117 | int r; | |
1118 | ||
1119 | assert(name); | |
1120 | ||
1121 | if (pid == 0) | |
1122 | r = readlink_malloc("/proc/self/exe", name); | |
1123 | else { | |
1124 | char *p; | |
1125 | if (asprintf(&p, "/proc/%lu/exe", (unsigned long) pid) < 0) | |
1126 | return -ENOMEM; | |
1127 | ||
1128 | r = readlink_malloc(p, name); | |
1129 | free(p); | |
1130 | } | |
1131 | ||
1132 | return r; | |
1133 | } | |
1134 | ||
901c3d0d | 1135 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
7e4ab3c5 LP |
1136 | char *p; |
1137 | FILE *f; | |
1138 | int r; | |
1139 | ||
1140 | assert(uid); | |
1141 | ||
1142 | if (pid == 0) | |
1143 | return getuid(); | |
1144 | ||
1145 | if (asprintf(&p, "/proc/%lu/status", (unsigned long) pid) < 0) | |
1146 | return -ENOMEM; | |
1147 | ||
1148 | f = fopen(p, "re"); | |
1149 | free(p); | |
1150 | ||
1151 | if (!f) | |
1152 | return -errno; | |
1153 | ||
1154 | while (!feof(f)) { | |
1155 | char line[LINE_MAX], *l; | |
1156 | ||
1157 | if (!fgets(line, sizeof(line), f)) { | |
1158 | if (feof(f)) | |
1159 | break; | |
1160 | ||
1161 | r = -errno; | |
1162 | goto finish; | |
1163 | } | |
1164 | ||
1165 | l = strstrip(line); | |
1166 | ||
901c3d0d LP |
1167 | if (startswith(l, field)) { |
1168 | l += strlen(field); | |
7e4ab3c5 LP |
1169 | l += strspn(l, WHITESPACE); |
1170 | ||
1171 | l[strcspn(l, WHITESPACE)] = 0; | |
1172 | ||
1173 | r = parse_uid(l, uid); | |
1174 | goto finish; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | r = -EIO; | |
1179 | ||
1180 | finish: | |
1181 | fclose(f); | |
1182 | ||
1183 | return r; | |
1184 | } | |
1185 | ||
901c3d0d LP |
1186 | int get_process_uid(pid_t pid, uid_t *uid) { |
1187 | return get_process_id(pid, "Uid:", uid); | |
1188 | } | |
1189 | ||
1190 | int get_process_gid(pid_t pid, gid_t *gid) { | |
1191 | return get_process_id(pid, "Gid:", gid); | |
1192 | } | |
1193 | ||
fab56fc5 LP |
1194 | char *strnappend(const char *s, const char *suffix, size_t b) { |
1195 | size_t a; | |
44d8db9e LP |
1196 | char *r; |
1197 | ||
fab56fc5 LP |
1198 | if (!s && !suffix) |
1199 | return strdup(""); | |
1200 | ||
1201 | if (!s) | |
1202 | return strndup(suffix, b); | |
1203 | ||
1204 | if (!suffix) | |
1205 | return strdup(s); | |
1206 | ||
44d8db9e LP |
1207 | assert(s); |
1208 | assert(suffix); | |
1209 | ||
1210 | a = strlen(s); | |
aa408e77 | 1211 | if (b > ((size_t) -1) - a) |
040f18ea | 1212 | return NULL; |
44d8db9e | 1213 | |
040f18ea LP |
1214 | r = new(char, a+b+1); |
1215 | if (!r) | |
44d8db9e LP |
1216 | return NULL; |
1217 | ||
1218 | memcpy(r, s, a); | |
1219 | memcpy(r+a, suffix, b); | |
1220 | r[a+b] = 0; | |
1221 | ||
1222 | return r; | |
1223 | } | |
87f0e418 | 1224 | |
fab56fc5 LP |
1225 | char *strappend(const char *s, const char *suffix) { |
1226 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
1227 | } | |
1228 | ||
87f0e418 LP |
1229 | int readlink_malloc(const char *p, char **r) { |
1230 | size_t l = 100; | |
1231 | ||
1232 | assert(p); | |
1233 | assert(r); | |
1234 | ||
1235 | for (;;) { | |
1236 | char *c; | |
1237 | ssize_t n; | |
1238 | ||
1239 | if (!(c = new(char, l))) | |
1240 | return -ENOMEM; | |
1241 | ||
1242 | if ((n = readlink(p, c, l-1)) < 0) { | |
1243 | int ret = -errno; | |
1244 | free(c); | |
1245 | return ret; | |
1246 | } | |
1247 | ||
1248 | if ((size_t) n < l-1) { | |
1249 | c[n] = 0; | |
1250 | *r = c; | |
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | free(c); | |
1255 | l *= 2; | |
1256 | } | |
1257 | } | |
1258 | ||
2c7108c4 LP |
1259 | int readlink_and_make_absolute(const char *p, char **r) { |
1260 | char *target, *k; | |
1261 | int j; | |
1262 | ||
1263 | assert(p); | |
1264 | assert(r); | |
1265 | ||
1266 | if ((j = readlink_malloc(p, &target)) < 0) | |
1267 | return j; | |
1268 | ||
1269 | k = file_in_same_dir(p, target); | |
1270 | free(target); | |
1271 | ||
1272 | if (!k) | |
1273 | return -ENOMEM; | |
1274 | ||
1275 | *r = k; | |
1276 | return 0; | |
1277 | } | |
1278 | ||
83096483 LP |
1279 | int readlink_and_canonicalize(const char *p, char **r) { |
1280 | char *t, *s; | |
1281 | int j; | |
1282 | ||
1283 | assert(p); | |
1284 | assert(r); | |
1285 | ||
1286 | j = readlink_and_make_absolute(p, &t); | |
1287 | if (j < 0) | |
1288 | return j; | |
1289 | ||
1290 | s = canonicalize_file_name(t); | |
1291 | if (s) { | |
1292 | free(t); | |
1293 | *r = s; | |
1294 | } else | |
1295 | *r = t; | |
1296 | ||
1297 | path_kill_slashes(*r); | |
1298 | ||
1299 | return 0; | |
1300 | } | |
1301 | ||
2a987ee8 LP |
1302 | int reset_all_signal_handlers(void) { |
1303 | int sig; | |
1304 | ||
1305 | for (sig = 1; sig < _NSIG; sig++) { | |
1306 | struct sigaction sa; | |
1307 | ||
1308 | if (sig == SIGKILL || sig == SIGSTOP) | |
1309 | continue; | |
1310 | ||
1311 | zero(sa); | |
1312 | sa.sa_handler = SIG_DFL; | |
431c32bf | 1313 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
1314 | |
1315 | /* On Linux the first two RT signals are reserved by | |
1316 | * glibc, and sigaction() will return EINVAL for them. */ | |
1317 | if ((sigaction(sig, &sa, NULL) < 0)) | |
1318 | if (errno != EINVAL) | |
1319 | return -errno; | |
1320 | } | |
1321 | ||
8e274523 | 1322 | return 0; |
2a987ee8 | 1323 | } |
4a72ff34 LP |
1324 | |
1325 | char *strstrip(char *s) { | |
57a8eca8 | 1326 | char *e; |
4a72ff34 LP |
1327 | |
1328 | /* Drops trailing whitespace. Modifies the string in | |
1329 | * place. Returns pointer to first non-space character */ | |
1330 | ||
1331 | s += strspn(s, WHITESPACE); | |
1332 | ||
57a8eca8 LP |
1333 | for (e = strchr(s, 0); e > s; e --) |
1334 | if (!strchr(WHITESPACE, e[-1])) | |
1335 | break; | |
4a72ff34 | 1336 | |
57a8eca8 | 1337 | *e = 0; |
4a72ff34 LP |
1338 | |
1339 | return s; | |
4a72ff34 LP |
1340 | } |
1341 | ||
ee9b5e01 LP |
1342 | char *delete_chars(char *s, const char *bad) { |
1343 | char *f, *t; | |
1344 | ||
1345 | /* Drops all whitespace, regardless where in the string */ | |
1346 | ||
1347 | for (f = s, t = s; *f; f++) { | |
1348 | if (strchr(bad, *f)) | |
1349 | continue; | |
1350 | ||
1351 | *(t++) = *f; | |
1352 | } | |
1353 | ||
1354 | *t = 0; | |
1355 | ||
1356 | return s; | |
1357 | } | |
1358 | ||
ab1f0633 LP |
1359 | bool in_charset(const char *s, const char* charset) { |
1360 | const char *i; | |
1361 | ||
1362 | assert(s); | |
1363 | assert(charset); | |
1364 | ||
1365 | for (i = s; *i; i++) | |
1366 | if (!strchr(charset, *i)) | |
1367 | return false; | |
1368 | ||
1369 | return true; | |
1370 | } | |
1371 | ||
4a72ff34 LP |
1372 | char *file_in_same_dir(const char *path, const char *filename) { |
1373 | char *e, *r; | |
1374 | size_t k; | |
1375 | ||
1376 | assert(path); | |
1377 | assert(filename); | |
1378 | ||
1379 | /* This removes the last component of path and appends | |
1380 | * filename, unless the latter is absolute anyway or the | |
1381 | * former isn't */ | |
1382 | ||
1383 | if (path_is_absolute(filename)) | |
1384 | return strdup(filename); | |
1385 | ||
1386 | if (!(e = strrchr(path, '/'))) | |
1387 | return strdup(filename); | |
1388 | ||
1389 | k = strlen(filename); | |
1390 | if (!(r = new(char, e-path+1+k+1))) | |
1391 | return NULL; | |
1392 | ||
1393 | memcpy(r, path, e-path+1); | |
1394 | memcpy(r+(e-path)+1, filename, k+1); | |
1395 | ||
1396 | return r; | |
1397 | } | |
fb624d04 | 1398 | |
c32dd69b LP |
1399 | int rmdir_parents(const char *path, const char *stop) { |
1400 | size_t l; | |
1401 | int r = 0; | |
1402 | ||
1403 | assert(path); | |
1404 | assert(stop); | |
1405 | ||
1406 | l = strlen(path); | |
1407 | ||
1408 | /* Skip trailing slashes */ | |
1409 | while (l > 0 && path[l-1] == '/') | |
1410 | l--; | |
1411 | ||
1412 | while (l > 0) { | |
1413 | char *t; | |
1414 | ||
1415 | /* Skip last component */ | |
1416 | while (l > 0 && path[l-1] != '/') | |
1417 | l--; | |
1418 | ||
1419 | /* Skip trailing slashes */ | |
1420 | while (l > 0 && path[l-1] == '/') | |
1421 | l--; | |
1422 | ||
1423 | if (l <= 0) | |
1424 | break; | |
1425 | ||
1426 | if (!(t = strndup(path, l))) | |
1427 | return -ENOMEM; | |
1428 | ||
1429 | if (path_startswith(stop, t)) { | |
1430 | free(t); | |
1431 | return 0; | |
1432 | } | |
1433 | ||
1434 | r = rmdir(t); | |
1435 | free(t); | |
1436 | ||
1437 | if (r < 0) | |
1438 | if (errno != ENOENT) | |
1439 | return -errno; | |
1440 | } | |
1441 | ||
1442 | return 0; | |
1443 | } | |
1444 | ||
1445 | ||
fb624d04 LP |
1446 | char hexchar(int x) { |
1447 | static const char table[16] = "0123456789abcdef"; | |
1448 | ||
1449 | return table[x & 15]; | |
1450 | } | |
4fe88d28 LP |
1451 | |
1452 | int unhexchar(char c) { | |
1453 | ||
1454 | if (c >= '0' && c <= '9') | |
1455 | return c - '0'; | |
1456 | ||
1457 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1458 | return c - 'a' + 10; |
4fe88d28 LP |
1459 | |
1460 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1461 | return c - 'A' + 10; |
4fe88d28 LP |
1462 | |
1463 | return -1; | |
1464 | } | |
1465 | ||
1466 | char octchar(int x) { | |
1467 | return '0' + (x & 7); | |
1468 | } | |
1469 | ||
1470 | int unoctchar(char c) { | |
1471 | ||
1472 | if (c >= '0' && c <= '7') | |
1473 | return c - '0'; | |
1474 | ||
1475 | return -1; | |
1476 | } | |
1477 | ||
5af98f82 LP |
1478 | char decchar(int x) { |
1479 | return '0' + (x % 10); | |
1480 | } | |
1481 | ||
1482 | int undecchar(char c) { | |
1483 | ||
1484 | if (c >= '0' && c <= '9') | |
1485 | return c - '0'; | |
1486 | ||
1487 | return -1; | |
1488 | } | |
1489 | ||
4fe88d28 LP |
1490 | char *cescape(const char *s) { |
1491 | char *r, *t; | |
1492 | const char *f; | |
1493 | ||
1494 | assert(s); | |
1495 | ||
1496 | /* Does C style string escaping. */ | |
1497 | ||
f8e2fb7b LP |
1498 | r = new(char, strlen(s)*4 + 1); |
1499 | if (!r) | |
4fe88d28 LP |
1500 | return NULL; |
1501 | ||
1502 | for (f = s, t = r; *f; f++) | |
1503 | ||
1504 | switch (*f) { | |
1505 | ||
1506 | case '\a': | |
1507 | *(t++) = '\\'; | |
1508 | *(t++) = 'a'; | |
1509 | break; | |
1510 | case '\b': | |
1511 | *(t++) = '\\'; | |
1512 | *(t++) = 'b'; | |
1513 | break; | |
1514 | case '\f': | |
1515 | *(t++) = '\\'; | |
1516 | *(t++) = 'f'; | |
1517 | break; | |
1518 | case '\n': | |
1519 | *(t++) = '\\'; | |
1520 | *(t++) = 'n'; | |
1521 | break; | |
1522 | case '\r': | |
1523 | *(t++) = '\\'; | |
1524 | *(t++) = 'r'; | |
1525 | break; | |
1526 | case '\t': | |
1527 | *(t++) = '\\'; | |
1528 | *(t++) = 't'; | |
1529 | break; | |
1530 | case '\v': | |
1531 | *(t++) = '\\'; | |
1532 | *(t++) = 'v'; | |
1533 | break; | |
1534 | case '\\': | |
1535 | *(t++) = '\\'; | |
1536 | *(t++) = '\\'; | |
1537 | break; | |
1538 | case '"': | |
1539 | *(t++) = '\\'; | |
1540 | *(t++) = '"'; | |
1541 | break; | |
1542 | case '\'': | |
1543 | *(t++) = '\\'; | |
1544 | *(t++) = '\''; | |
1545 | break; | |
1546 | ||
1547 | default: | |
1548 | /* For special chars we prefer octal over | |
1549 | * hexadecimal encoding, simply because glib's | |
1550 | * g_strescape() does the same */ | |
1551 | if ((*f < ' ') || (*f >= 127)) { | |
1552 | *(t++) = '\\'; | |
1553 | *(t++) = octchar((unsigned char) *f >> 6); | |
1554 | *(t++) = octchar((unsigned char) *f >> 3); | |
1555 | *(t++) = octchar((unsigned char) *f); | |
1556 | } else | |
1557 | *(t++) = *f; | |
1558 | break; | |
1559 | } | |
1560 | ||
1561 | *t = 0; | |
1562 | ||
1563 | return r; | |
1564 | } | |
1565 | ||
5b4c61cd | 1566 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1567 | char *r, *t; |
1568 | const char *f; | |
5b4c61cd | 1569 | size_t pl; |
4fe88d28 LP |
1570 | |
1571 | assert(s); | |
1572 | ||
5b4c61cd LP |
1573 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1574 | ||
1575 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1576 | |
5b4c61cd | 1577 | r = new(char, pl+length+1); |
7f110ff9 | 1578 | if (!r) |
4fe88d28 LP |
1579 | return r; |
1580 | ||
5b4c61cd LP |
1581 | if (prefix) |
1582 | memcpy(r, prefix, pl); | |
1583 | ||
1584 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1585 | |
1586 | if (*f != '\\') { | |
1587 | *(t++) = *f; | |
1588 | continue; | |
1589 | } | |
1590 | ||
1591 | f++; | |
1592 | ||
1593 | switch (*f) { | |
1594 | ||
1595 | case 'a': | |
1596 | *(t++) = '\a'; | |
1597 | break; | |
1598 | case 'b': | |
1599 | *(t++) = '\b'; | |
1600 | break; | |
1601 | case 'f': | |
1602 | *(t++) = '\f'; | |
1603 | break; | |
1604 | case 'n': | |
1605 | *(t++) = '\n'; | |
1606 | break; | |
1607 | case 'r': | |
1608 | *(t++) = '\r'; | |
1609 | break; | |
1610 | case 't': | |
1611 | *(t++) = '\t'; | |
1612 | break; | |
1613 | case 'v': | |
1614 | *(t++) = '\v'; | |
1615 | break; | |
1616 | case '\\': | |
1617 | *(t++) = '\\'; | |
1618 | break; | |
1619 | case '"': | |
1620 | *(t++) = '"'; | |
1621 | break; | |
1622 | case '\'': | |
1623 | *(t++) = '\''; | |
1624 | break; | |
1625 | ||
e167fb86 LP |
1626 | case 's': |
1627 | /* This is an extension of the XDG syntax files */ | |
1628 | *(t++) = ' '; | |
1629 | break; | |
1630 | ||
4fe88d28 LP |
1631 | case 'x': { |
1632 | /* hexadecimal encoding */ | |
1633 | int a, b; | |
1634 | ||
7f110ff9 LP |
1635 | a = unhexchar(f[1]); |
1636 | b = unhexchar(f[2]); | |
1637 | ||
1638 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1639 | /* Invalid escape code, let's take it literal then */ |
1640 | *(t++) = '\\'; | |
1641 | *(t++) = 'x'; | |
1642 | } else { | |
1643 | *(t++) = (char) ((a << 4) | b); | |
1644 | f += 2; | |
1645 | } | |
1646 | ||
1647 | break; | |
1648 | } | |
1649 | ||
1650 | case '0': | |
1651 | case '1': | |
1652 | case '2': | |
1653 | case '3': | |
1654 | case '4': | |
1655 | case '5': | |
1656 | case '6': | |
1657 | case '7': { | |
1658 | /* octal encoding */ | |
1659 | int a, b, c; | |
1660 | ||
7f110ff9 LP |
1661 | a = unoctchar(f[0]); |
1662 | b = unoctchar(f[1]); | |
1663 | c = unoctchar(f[2]); | |
1664 | ||
1665 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1666 | /* Invalid escape code, let's take it literal then */ |
1667 | *(t++) = '\\'; | |
1668 | *(t++) = f[0]; | |
1669 | } else { | |
1670 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1671 | f += 2; | |
1672 | } | |
1673 | ||
1674 | break; | |
1675 | } | |
1676 | ||
1677 | case 0: | |
1678 | /* premature end of string.*/ | |
1679 | *(t++) = '\\'; | |
1680 | goto finish; | |
1681 | ||
1682 | default: | |
1683 | /* Invalid escape code, let's take it literal then */ | |
1684 | *(t++) = '\\'; | |
f3d4cc01 | 1685 | *(t++) = *f; |
4fe88d28 LP |
1686 | break; |
1687 | } | |
1688 | } | |
1689 | ||
1690 | finish: | |
1691 | *t = 0; | |
1692 | return r; | |
1693 | } | |
1694 | ||
5b4c61cd LP |
1695 | char *cunescape_length(const char *s, size_t length) { |
1696 | return cunescape_length_with_prefix(s, length, NULL); | |
1697 | } | |
1698 | ||
6febfd0d | 1699 | char *cunescape(const char *s) { |
5b4c61cd LP |
1700 | assert(s); |
1701 | ||
6febfd0d LP |
1702 | return cunescape_length(s, strlen(s)); |
1703 | } | |
4fe88d28 LP |
1704 | |
1705 | char *xescape(const char *s, const char *bad) { | |
1706 | char *r, *t; | |
1707 | const char *f; | |
1708 | ||
1709 | /* Escapes all chars in bad, in addition to \ and all special | |
1710 | * chars, in \xFF style escaping. May be reversed with | |
1711 | * cunescape. */ | |
1712 | ||
08ace05b LP |
1713 | r = new(char, strlen(s) * 4 + 1); |
1714 | if (!r) | |
4fe88d28 LP |
1715 | return NULL; |
1716 | ||
1717 | for (f = s, t = r; *f; f++) { | |
1718 | ||
b866264a LP |
1719 | if ((*f < ' ') || (*f >= 127) || |
1720 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1721 | *(t++) = '\\'; |
1722 | *(t++) = 'x'; | |
1723 | *(t++) = hexchar(*f >> 4); | |
1724 | *(t++) = hexchar(*f); | |
1725 | } else | |
1726 | *(t++) = *f; | |
1727 | } | |
1728 | ||
1729 | *t = 0; | |
1730 | ||
1731 | return r; | |
1732 | } | |
1733 | ||
ea430986 | 1734 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1735 | char *r, *t; |
1736 | const char *f; | |
1737 | ||
47be870b LP |
1738 | assert(s); |
1739 | ||
ea430986 LP |
1740 | /* Escapes all chars that D-Bus' object path cannot deal |
1741 | * with. Can be reverse with bus_path_unescape() */ | |
1742 | ||
1743 | if (!(r = new(char, strlen(s)*3+1))) | |
1744 | return NULL; | |
1745 | ||
1746 | for (f = s, t = r; *f; f++) { | |
1747 | ||
1748 | if (!(*f >= 'A' && *f <= 'Z') && | |
1749 | !(*f >= 'a' && *f <= 'z') && | |
1750 | !(*f >= '0' && *f <= '9')) { | |
1751 | *(t++) = '_'; | |
1752 | *(t++) = hexchar(*f >> 4); | |
1753 | *(t++) = hexchar(*f); | |
1754 | } else | |
1755 | *(t++) = *f; | |
1756 | } | |
1757 | ||
1758 | *t = 0; | |
1759 | ||
1760 | return r; | |
1761 | } | |
1762 | ||
9e2f7c11 | 1763 | char *bus_path_unescape(const char *f) { |
ea430986 | 1764 | char *r, *t; |
ea430986 | 1765 | |
9e2f7c11 | 1766 | assert(f); |
47be870b | 1767 | |
9e2f7c11 | 1768 | if (!(r = strdup(f))) |
ea430986 LP |
1769 | return NULL; |
1770 | ||
9e2f7c11 | 1771 | for (t = r; *f; f++) { |
ea430986 LP |
1772 | |
1773 | if (*f == '_') { | |
1774 | int a, b; | |
1775 | ||
1776 | if ((a = unhexchar(f[1])) < 0 || | |
1777 | (b = unhexchar(f[2])) < 0) { | |
1778 | /* Invalid escape code, let's take it literal then */ | |
1779 | *(t++) = '_'; | |
1780 | } else { | |
1781 | *(t++) = (char) ((a << 4) | b); | |
1782 | f += 2; | |
1783 | } | |
1784 | } else | |
1785 | *(t++) = *f; | |
1786 | } | |
1787 | ||
1788 | *t = 0; | |
1789 | ||
1790 | return r; | |
1791 | } | |
1792 | ||
67d51650 | 1793 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1794 | char *p; |
1795 | ||
67d51650 | 1796 | assert(t); |
4fe88d28 | 1797 | |
67d51650 | 1798 | for (p = t; *p; p++) |
4fe88d28 LP |
1799 | if (*p >= 'A' && *p <= 'Z') |
1800 | *p = *p - 'A' + 'a'; | |
1801 | ||
67d51650 | 1802 | return t; |
4fe88d28 | 1803 | } |
1dccbe19 | 1804 | |
a228a22f | 1805 | static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1806 | assert(filename); |
1807 | ||
1808 | return | |
1809 | filename[0] == '.' || | |
6c78be3c | 1810 | streq(filename, "lost+found") || |
e472d476 LP |
1811 | streq(filename, "aquota.user") || |
1812 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1813 | endswith(filename, ".rpmnew") || |
1814 | endswith(filename, ".rpmsave") || | |
1815 | endswith(filename, ".rpmorig") || | |
1816 | endswith(filename, ".dpkg-old") || | |
1817 | endswith(filename, ".dpkg-new") || | |
1818 | endswith(filename, ".swp"); | |
1819 | } | |
1820 | ||
a228a22f LP |
1821 | bool ignore_file(const char *filename) { |
1822 | assert(filename); | |
1823 | ||
1824 | if (endswith(filename, "~")) | |
1825 | return false; | |
1826 | ||
1827 | return ignore_file_allow_backup(filename); | |
1828 | } | |
1829 | ||
3a0ecb08 LP |
1830 | int fd_nonblock(int fd, bool nonblock) { |
1831 | int flags; | |
1832 | ||
1833 | assert(fd >= 0); | |
1834 | ||
1835 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1836 | return -errno; | |
1837 | ||
1838 | if (nonblock) | |
1839 | flags |= O_NONBLOCK; | |
1840 | else | |
1841 | flags &= ~O_NONBLOCK; | |
1842 | ||
1843 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1844 | return -errno; | |
1845 | ||
1846 | return 0; | |
1847 | } | |
1848 | ||
1849 | int fd_cloexec(int fd, bool cloexec) { | |
1850 | int flags; | |
1851 | ||
1852 | assert(fd >= 0); | |
1853 | ||
1854 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1855 | return -errno; | |
1856 | ||
1857 | if (cloexec) | |
1858 | flags |= FD_CLOEXEC; | |
1859 | else | |
1860 | flags &= ~FD_CLOEXEC; | |
1861 | ||
1862 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1863 | return -errno; | |
1864 | ||
1865 | return 0; | |
1866 | } | |
1867 | ||
b19be9eb LP |
1868 | static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
1869 | unsigned i; | |
1870 | ||
1871 | assert(n_fdset == 0 || fdset); | |
1872 | ||
1873 | for (i = 0; i < n_fdset; i++) | |
1874 | if (fdset[i] == fd) | |
1875 | return true; | |
1876 | ||
1877 | return false; | |
1878 | } | |
1879 | ||
a0d40ac5 LP |
1880 | int close_all_fds(const int except[], unsigned n_except) { |
1881 | DIR *d; | |
1882 | struct dirent *de; | |
1883 | int r = 0; | |
1884 | ||
b19be9eb LP |
1885 | assert(n_except == 0 || except); |
1886 | ||
1887 | d = opendir("/proc/self/fd"); | |
1888 | if (!d) { | |
1889 | int fd; | |
1890 | struct rlimit rl; | |
1891 | ||
1892 | /* When /proc isn't available (for example in chroots) | |
1893 | * the fallback is brute forcing through the fd | |
1894 | * table */ | |
1895 | ||
1896 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1897 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1898 | ||
1899 | if (fd_in_set(fd, except, n_except)) | |
1900 | continue; | |
1901 | ||
1902 | if (close_nointr(fd) < 0) | |
1903 | if (errno != EBADF && r == 0) | |
1904 | r = -errno; | |
1905 | } | |
1906 | ||
1907 | return r; | |
1908 | } | |
a0d40ac5 LP |
1909 | |
1910 | while ((de = readdir(d))) { | |
a7610064 | 1911 | int fd = -1; |
a0d40ac5 | 1912 | |
a16e1123 | 1913 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1914 | continue; |
1915 | ||
720ce21d LP |
1916 | if (safe_atoi(de->d_name, &fd) < 0) |
1917 | /* Let's better ignore this, just in case */ | |
1918 | continue; | |
a0d40ac5 LP |
1919 | |
1920 | if (fd < 3) | |
1921 | continue; | |
1922 | ||
1923 | if (fd == dirfd(d)) | |
1924 | continue; | |
1925 | ||
b19be9eb LP |
1926 | if (fd_in_set(fd, except, n_except)) |
1927 | continue; | |
a0d40ac5 | 1928 | |
720ce21d | 1929 | if (close_nointr(fd) < 0) { |
2f357920 | 1930 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1931 | if (errno != EBADF && r == 0) |
1932 | r = -errno; | |
2f357920 | 1933 | } |
a0d40ac5 LP |
1934 | } |
1935 | ||
a0d40ac5 LP |
1936 | closedir(d); |
1937 | return r; | |
1938 | } | |
1939 | ||
db12775d LP |
1940 | bool chars_intersect(const char *a, const char *b) { |
1941 | const char *p; | |
1942 | ||
1943 | /* Returns true if any of the chars in a are in b. */ | |
1944 | for (p = a; *p; p++) | |
1945 | if (strchr(b, *p)) | |
1946 | return true; | |
1947 | ||
1948 | return false; | |
1949 | } | |
1950 | ||
8b6c7120 LP |
1951 | char *format_timestamp(char *buf, size_t l, usec_t t) { |
1952 | struct tm tm; | |
1953 | time_t sec; | |
1954 | ||
1955 | assert(buf); | |
1956 | assert(l > 0); | |
1957 | ||
1958 | if (t <= 0) | |
1959 | return NULL; | |
1960 | ||
f872ec33 | 1961 | sec = (time_t) (t / USEC_PER_SEC); |
8b6c7120 | 1962 | |
6d0274f1 | 1963 | if (strftime(buf, l, "%a, %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm)) <= 0) |
8b6c7120 LP |
1964 | return NULL; |
1965 | ||
1966 | return buf; | |
1967 | } | |
1968 | ||
584be568 LP |
1969 | char *format_timestamp_pretty(char *buf, size_t l, usec_t t) { |
1970 | usec_t n, d; | |
1971 | ||
1972 | n = now(CLOCK_REALTIME); | |
1973 | ||
1974 | if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) | |
1975 | return NULL; | |
1976 | ||
1977 | d = n - t; | |
1978 | ||
1979 | if (d >= USEC_PER_YEAR) | |
1980 | snprintf(buf, l, "%llu years and %llu months ago", | |
1981 | (unsigned long long) (d / USEC_PER_YEAR), | |
1982 | (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); | |
1983 | else if (d >= USEC_PER_MONTH) | |
1984 | snprintf(buf, l, "%llu months and %llu days ago", | |
1985 | (unsigned long long) (d / USEC_PER_MONTH), | |
1986 | (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); | |
1987 | else if (d >= USEC_PER_WEEK) | |
1988 | snprintf(buf, l, "%llu weeks and %llu days ago", | |
1989 | (unsigned long long) (d / USEC_PER_WEEK), | |
1990 | (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); | |
1991 | else if (d >= 2*USEC_PER_DAY) | |
1992 | snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); | |
1993 | else if (d >= 25*USEC_PER_HOUR) | |
1994 | snprintf(buf, l, "1 day and %lluh ago", | |
1995 | (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); | |
1996 | else if (d >= 6*USEC_PER_HOUR) | |
1997 | snprintf(buf, l, "%lluh ago", | |
1998 | (unsigned long long) (d / USEC_PER_HOUR)); | |
1999 | else if (d >= USEC_PER_HOUR) | |
2000 | snprintf(buf, l, "%lluh %llumin ago", | |
2001 | (unsigned long long) (d / USEC_PER_HOUR), | |
2002 | (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); | |
2003 | else if (d >= 5*USEC_PER_MINUTE) | |
2004 | snprintf(buf, l, "%llumin ago", | |
2005 | (unsigned long long) (d / USEC_PER_MINUTE)); | |
2006 | else if (d >= USEC_PER_MINUTE) | |
2007 | snprintf(buf, l, "%llumin %llus ago", | |
2008 | (unsigned long long) (d / USEC_PER_MINUTE), | |
2009 | (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); | |
2010 | else if (d >= USEC_PER_SEC) | |
2011 | snprintf(buf, l, "%llus ago", | |
2012 | (unsigned long long) (d / USEC_PER_SEC)); | |
2013 | else if (d >= USEC_PER_MSEC) | |
2014 | snprintf(buf, l, "%llums ago", | |
2015 | (unsigned long long) (d / USEC_PER_MSEC)); | |
2016 | else if (d > 0) | |
2017 | snprintf(buf, l, "%lluus ago", | |
2018 | (unsigned long long) d); | |
2019 | else | |
2020 | snprintf(buf, l, "now"); | |
2021 | ||
2022 | buf[l-1] = 0; | |
2023 | return buf; | |
2024 | } | |
2025 | ||
871d7de4 LP |
2026 | char *format_timespan(char *buf, size_t l, usec_t t) { |
2027 | static const struct { | |
2028 | const char *suffix; | |
2029 | usec_t usec; | |
2030 | } table[] = { | |
2031 | { "w", USEC_PER_WEEK }, | |
2032 | { "d", USEC_PER_DAY }, | |
2033 | { "h", USEC_PER_HOUR }, | |
2034 | { "min", USEC_PER_MINUTE }, | |
2035 | { "s", USEC_PER_SEC }, | |
2036 | { "ms", USEC_PER_MSEC }, | |
2037 | { "us", 1 }, | |
2038 | }; | |
2039 | ||
2040 | unsigned i; | |
2041 | char *p = buf; | |
2042 | ||
2043 | assert(buf); | |
2044 | assert(l > 0); | |
2045 | ||
2046 | if (t == (usec_t) -1) | |
2047 | return NULL; | |
2048 | ||
4502d22c LP |
2049 | if (t == 0) { |
2050 | snprintf(p, l, "0"); | |
2051 | p[l-1] = 0; | |
2052 | return p; | |
2053 | } | |
2054 | ||
871d7de4 LP |
2055 | /* The result of this function can be parsed with parse_usec */ |
2056 | ||
2057 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
2058 | int k; | |
2059 | size_t n; | |
2060 | ||
2061 | if (t < table[i].usec) | |
2062 | continue; | |
2063 | ||
2064 | if (l <= 1) | |
2065 | break; | |
2066 | ||
2067 | k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix); | |
2068 | n = MIN((size_t) k, l); | |
2069 | ||
2070 | l -= n; | |
2071 | p += n; | |
2072 | ||
2073 | t %= table[i].usec; | |
2074 | } | |
2075 | ||
2076 | *p = 0; | |
2077 | ||
2078 | return buf; | |
2079 | } | |
2080 | ||
42856c10 | 2081 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
2082 | static const char table[] = |
2083 | "cifs\0" | |
2084 | "smbfs\0" | |
2085 | "ncpfs\0" | |
2086 | "nfs\0" | |
2087 | "nfs4\0" | |
2088 | "gfs\0" | |
73836c5c | 2089 | "gfs2\0"; |
42856c10 | 2090 | |
a05f97b3 | 2091 | return nulstr_contains(table, fstype); |
42856c10 LP |
2092 | } |
2093 | ||
601f6a1e | 2094 | int chvt(int vt) { |
a05f97b3 | 2095 | _cleanup_close_ int fd; |
601f6a1e | 2096 | |
a05f97b3 LP |
2097 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
2098 | if (fd < 0) | |
601f6a1e LP |
2099 | return -errno; |
2100 | ||
2101 | if (vt < 0) { | |
2102 | int tiocl[2] = { | |
2103 | TIOCL_GETKMSGREDIRECT, | |
2104 | 0 | |
2105 | }; | |
2106 | ||
a05f97b3 LP |
2107 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
2108 | return -errno; | |
601f6a1e LP |
2109 | |
2110 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
2111 | } | |
2112 | ||
2113 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 2114 | return -errno; |
601f6a1e | 2115 | |
a05f97b3 | 2116 | return 0; |
601f6a1e LP |
2117 | } |
2118 | ||
8f2d43a0 | 2119 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
2120 | struct termios old_termios, new_termios; |
2121 | char c; | |
20c03b7b | 2122 | char line[LINE_MAX]; |
80876c20 LP |
2123 | |
2124 | assert(f); | |
2125 | assert(ret); | |
2126 | ||
2127 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
2128 | new_termios = old_termios; | |
2129 | ||
2130 | new_termios.c_lflag &= ~ICANON; | |
2131 | new_termios.c_cc[VMIN] = 1; | |
2132 | new_termios.c_cc[VTIME] = 0; | |
2133 | ||
2134 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
2135 | size_t k; | |
2136 | ||
8f2d43a0 LP |
2137 | if (t != (usec_t) -1) { |
2138 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
2139 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2140 | return -ETIMEDOUT; | |
2141 | } | |
2142 | } | |
2143 | ||
80876c20 LP |
2144 | k = fread(&c, 1, 1, f); |
2145 | ||
2146 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2147 | ||
2148 | if (k <= 0) | |
2149 | return -EIO; | |
2150 | ||
2151 | if (need_nl) | |
2152 | *need_nl = c != '\n'; | |
2153 | ||
2154 | *ret = c; | |
2155 | return 0; | |
2156 | } | |
2157 | } | |
2158 | ||
8f2d43a0 LP |
2159 | if (t != (usec_t) -1) |
2160 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
2161 | return -ETIMEDOUT; | |
2162 | ||
2163 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
2164 | return -EIO; |
2165 | ||
2166 | truncate_nl(line); | |
2167 | ||
2168 | if (strlen(line) != 1) | |
2169 | return -EBADMSG; | |
2170 | ||
2171 | if (need_nl) | |
2172 | *need_nl = false; | |
2173 | ||
2174 | *ret = line[0]; | |
2175 | return 0; | |
2176 | } | |
2177 | ||
2178 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 | 2179 | |
80876c20 LP |
2180 | assert(ret); |
2181 | assert(replies); | |
2182 | assert(text); | |
2183 | ||
2184 | for (;;) { | |
2185 | va_list ap; | |
2186 | char c; | |
2187 | int r; | |
2188 | bool need_nl = true; | |
2189 | ||
8481248b | 2190 | if (on_tty()) |
c1072ea0 | 2191 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 2192 | |
80876c20 LP |
2193 | va_start(ap, text); |
2194 | vprintf(text, ap); | |
2195 | va_end(ap); | |
2196 | ||
8481248b | 2197 | if (on_tty()) |
c1072ea0 | 2198 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 2199 | |
80876c20 LP |
2200 | fflush(stdout); |
2201 | ||
8f2d43a0 LP |
2202 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
2203 | if (r < 0) { | |
80876c20 LP |
2204 | |
2205 | if (r == -EBADMSG) { | |
2206 | puts("Bad input, please try again."); | |
2207 | continue; | |
2208 | } | |
2209 | ||
2210 | putchar('\n'); | |
2211 | return r; | |
2212 | } | |
2213 | ||
2214 | if (need_nl) | |
2215 | putchar('\n'); | |
2216 | ||
2217 | if (strchr(replies, c)) { | |
2218 | *ret = c; | |
2219 | return 0; | |
2220 | } | |
2221 | ||
2222 | puts("Read unexpected character, please try again."); | |
2223 | } | |
2224 | } | |
2225 | ||
512947d4 | 2226 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
2227 | struct termios termios; |
2228 | int r = 0; | |
3fe5e5d4 LP |
2229 | |
2230 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
2231 | |
2232 | assert(fd >= 0); | |
2233 | ||
eed1d0e3 LP |
2234 | /* We leave locked terminal attributes untouched, so that |
2235 | * Plymouth may set whatever it wants to set, and we don't | |
2236 | * interfere with that. */ | |
3fe5e5d4 LP |
2237 | |
2238 | /* Disable exclusive mode, just in case */ | |
2239 | ioctl(fd, TIOCNXCL); | |
2240 | ||
5c0100a5 | 2241 | /* Switch to text mode */ |
512947d4 MS |
2242 | if (switch_to_text) |
2243 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 2244 | |
3fe5e5d4 | 2245 | /* Enable console unicode mode */ |
df465b3f | 2246 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
2247 | |
2248 | if (tcgetattr(fd, &termios) < 0) { | |
2249 | r = -errno; | |
2250 | goto finish; | |
2251 | } | |
2252 | ||
aaf694ca LP |
2253 | /* We only reset the stuff that matters to the software. How |
2254 | * hardware is set up we don't touch assuming that somebody | |
2255 | * else will do that for us */ | |
2256 | ||
2257 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
2258 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
2259 | termios.c_oflag |= ONLCR; | |
2260 | termios.c_cflag |= CREAD; | |
2261 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
2262 | ||
2263 | termios.c_cc[VINTR] = 03; /* ^C */ | |
2264 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
2265 | termios.c_cc[VERASE] = 0177; | |
2266 | termios.c_cc[VKILL] = 025; /* ^X */ | |
2267 | termios.c_cc[VEOF] = 04; /* ^D */ | |
2268 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
2269 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
2270 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
2271 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
2272 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
2273 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
2274 | termios.c_cc[VEOL] = 0; |
2275 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
2276 | |
2277 | termios.c_cc[VTIME] = 0; | |
2278 | termios.c_cc[VMIN] = 1; | |
2279 | ||
2280 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
2281 | r = -errno; | |
2282 | ||
2283 | finish: | |
2284 | /* Just in case, flush all crap out */ | |
2285 | tcflush(fd, TCIOFLUSH); | |
2286 | ||
2287 | return r; | |
2288 | } | |
2289 | ||
6ea832a2 LP |
2290 | int reset_terminal(const char *name) { |
2291 | int fd, r; | |
2292 | ||
2293 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
2294 | if (fd < 0) | |
2295 | return fd; | |
2296 | ||
512947d4 | 2297 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
2298 | close_nointr_nofail(fd); |
2299 | ||
2300 | return r; | |
2301 | } | |
2302 | ||
80876c20 LP |
2303 | int open_terminal(const char *name, int mode) { |
2304 | int fd, r; | |
f73f76ac | 2305 | unsigned c = 0; |
80876c20 | 2306 | |
f73f76ac LP |
2307 | /* |
2308 | * If a TTY is in the process of being closed opening it might | |
2309 | * cause EIO. This is horribly awful, but unlikely to be | |
2310 | * changed in the kernel. Hence we work around this problem by | |
2311 | * retrying a couple of times. | |
2312 | * | |
2313 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
2314 | */ | |
2315 | ||
2316 | for (;;) { | |
af6da548 LP |
2317 | fd = open(name, mode); |
2318 | if (fd >= 0) | |
f73f76ac LP |
2319 | break; |
2320 | ||
2321 | if (errno != EIO) | |
2322 | return -errno; | |
2323 | ||
af6da548 | 2324 | /* Max 1s in total */ |
f73f76ac LP |
2325 | if (c >= 20) |
2326 | return -errno; | |
2327 | ||
2328 | usleep(50 * USEC_PER_MSEC); | |
2329 | c++; | |
2330 | } | |
2331 | ||
2332 | if (fd < 0) | |
80876c20 LP |
2333 | return -errno; |
2334 | ||
af6da548 LP |
2335 | r = isatty(fd); |
2336 | if (r < 0) { | |
80876c20 LP |
2337 | close_nointr_nofail(fd); |
2338 | return -errno; | |
2339 | } | |
2340 | ||
2341 | if (!r) { | |
2342 | close_nointr_nofail(fd); | |
2343 | return -ENOTTY; | |
2344 | } | |
2345 | ||
2346 | return fd; | |
2347 | } | |
2348 | ||
2349 | int flush_fd(int fd) { | |
2350 | struct pollfd pollfd; | |
2351 | ||
2352 | zero(pollfd); | |
2353 | pollfd.fd = fd; | |
2354 | pollfd.events = POLLIN; | |
2355 | ||
2356 | for (;;) { | |
20c03b7b | 2357 | char buf[LINE_MAX]; |
80876c20 LP |
2358 | ssize_t l; |
2359 | int r; | |
2360 | ||
2361 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2362 | ||
2363 | if (errno == EINTR) | |
2364 | continue; | |
2365 | ||
2366 | return -errno; | |
2367 | } | |
2368 | ||
2369 | if (r == 0) | |
2370 | return 0; | |
2371 | ||
2372 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2373 | ||
2374 | if (errno == EINTR) | |
2375 | continue; | |
2376 | ||
2377 | if (errno == EAGAIN) | |
2378 | return 0; | |
2379 | ||
2380 | return -errno; | |
2381 | } | |
2382 | ||
2383 | if (l <= 0) | |
2384 | return 0; | |
2385 | } | |
2386 | } | |
2387 | ||
af6da548 LP |
2388 | int acquire_terminal( |
2389 | const char *name, | |
2390 | bool fail, | |
2391 | bool force, | |
2392 | bool ignore_tiocstty_eperm, | |
2393 | usec_t timeout) { | |
2394 | ||
4a0ff478 | 2395 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 2396 | usec_t ts = 0; |
32c4bef8 | 2397 | struct sigaction sa_old, sa_new; |
80876c20 LP |
2398 | |
2399 | assert(name); | |
2400 | ||
2401 | /* We use inotify to be notified when the tty is closed. We | |
2402 | * create the watch before checking if we can actually acquire | |
2403 | * it, so that we don't lose any event. | |
2404 | * | |
2405 | * Note: strictly speaking this actually watches for the | |
2406 | * device being closed, it does *not* really watch whether a | |
2407 | * tty loses its controlling process. However, unless some | |
2408 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2409 | * its tty otherwise this will not become a problem. As long | |
2410 | * as the administrator makes sure not configure any service | |
2411 | * on the same tty as an untrusted user this should not be a | |
2412 | * problem. (Which he probably should not do anyway.) */ | |
2413 | ||
af6da548 LP |
2414 | if (timeout != (usec_t) -1) |
2415 | ts = now(CLOCK_MONOTONIC); | |
2416 | ||
80876c20 | 2417 | if (!fail && !force) { |
af6da548 LP |
2418 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
2419 | if (notify < 0) { | |
80876c20 LP |
2420 | r = -errno; |
2421 | goto fail; | |
2422 | } | |
2423 | ||
af6da548 LP |
2424 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
2425 | if (wd < 0) { | |
80876c20 LP |
2426 | r = -errno; |
2427 | goto fail; | |
2428 | } | |
2429 | } | |
2430 | ||
2431 | for (;;) { | |
af6da548 LP |
2432 | if (notify >= 0) { |
2433 | r = flush_fd(notify); | |
2434 | if (r < 0) | |
e3d1855b | 2435 | goto fail; |
af6da548 | 2436 | } |
80876c20 LP |
2437 | |
2438 | /* We pass here O_NOCTTY only so that we can check the return | |
2439 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2440 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
2441 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
2442 | if (fd < 0) | |
6ea832a2 | 2443 | return fd; |
80876c20 | 2444 | |
32c4bef8 LP |
2445 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2446 | * if we already own the tty. */ | |
2447 | zero(sa_new); | |
2448 | sa_new.sa_handler = SIG_IGN; | |
2449 | sa_new.sa_flags = SA_RESTART; | |
2450 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2451 | ||
80876c20 | 2452 | /* First, try to get the tty */ |
32c4bef8 LP |
2453 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
2454 | r = -errno; | |
2455 | ||
2456 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
2457 | |
2458 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2459 | * returning EPERM, i.e. when very likely we already | |
2460 | * are have this controlling terminal. */ | |
32c4bef8 | 2461 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
2462 | r = 0; |
2463 | ||
32c4bef8 | 2464 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
2465 | goto fail; |
2466 | } | |
2467 | ||
2468 | if (r >= 0) | |
2469 | break; | |
2470 | ||
2471 | assert(!fail); | |
2472 | assert(!force); | |
2473 | assert(notify >= 0); | |
2474 | ||
2475 | for (;;) { | |
f601daa7 | 2476 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 2477 | ssize_t l; |
f601daa7 | 2478 | struct inotify_event *e; |
80876c20 | 2479 | |
af6da548 LP |
2480 | if (timeout != (usec_t) -1) { |
2481 | usec_t n; | |
2482 | ||
2483 | n = now(CLOCK_MONOTONIC); | |
2484 | if (ts + timeout < n) { | |
2485 | r = -ETIMEDOUT; | |
2486 | goto fail; | |
2487 | } | |
2488 | ||
2489 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
2490 | if (r < 0) | |
2491 | goto fail; | |
2492 | ||
2493 | if (r == 0) { | |
2494 | r = -ETIMEDOUT; | |
2495 | goto fail; | |
2496 | } | |
2497 | } | |
2498 | ||
2499 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
2500 | if (l < 0) { | |
80876c20 | 2501 | |
af6da548 | 2502 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
2503 | continue; |
2504 | ||
2505 | r = -errno; | |
2506 | goto fail; | |
2507 | } | |
2508 | ||
2509 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2510 | |
f601daa7 LP |
2511 | while (l > 0) { |
2512 | size_t step; | |
80876c20 | 2513 | |
f601daa7 | 2514 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2515 | r = -EIO; |
f601daa7 LP |
2516 | goto fail; |
2517 | } | |
80876c20 | 2518 | |
f601daa7 LP |
2519 | step = sizeof(struct inotify_event) + e->len; |
2520 | assert(step <= (size_t) l); | |
80876c20 | 2521 | |
f601daa7 LP |
2522 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2523 | l -= step; | |
80876c20 LP |
2524 | } |
2525 | ||
2526 | break; | |
2527 | } | |
2528 | ||
2529 | /* We close the tty fd here since if the old session | |
2530 | * ended our handle will be dead. It's important that | |
2531 | * we do this after sleeping, so that we don't enter | |
2532 | * an endless loop. */ | |
2533 | close_nointr_nofail(fd); | |
2534 | } | |
2535 | ||
2536 | if (notify >= 0) | |
a16e1123 | 2537 | close_nointr_nofail(notify); |
80876c20 | 2538 | |
512947d4 MS |
2539 | r = reset_terminal_fd(fd, true); |
2540 | if (r < 0) | |
80876c20 LP |
2541 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2542 | ||
2543 | return fd; | |
2544 | ||
2545 | fail: | |
2546 | if (fd >= 0) | |
a16e1123 | 2547 | close_nointr_nofail(fd); |
80876c20 LP |
2548 | |
2549 | if (notify >= 0) | |
a16e1123 | 2550 | close_nointr_nofail(notify); |
80876c20 LP |
2551 | |
2552 | return r; | |
2553 | } | |
2554 | ||
2555 | int release_terminal(void) { | |
2556 | int r = 0, fd; | |
57cd2192 | 2557 | struct sigaction sa_old, sa_new; |
80876c20 | 2558 | |
ccaa6149 | 2559 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0) |
80876c20 LP |
2560 | return -errno; |
2561 | ||
57cd2192 LP |
2562 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2563 | * by our own TIOCNOTTY */ | |
2564 | ||
2565 | zero(sa_new); | |
2566 | sa_new.sa_handler = SIG_IGN; | |
2567 | sa_new.sa_flags = SA_RESTART; | |
2568 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2569 | ||
80876c20 LP |
2570 | if (ioctl(fd, TIOCNOTTY) < 0) |
2571 | r = -errno; | |
2572 | ||
57cd2192 LP |
2573 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2574 | ||
80876c20 LP |
2575 | close_nointr_nofail(fd); |
2576 | return r; | |
2577 | } | |
2578 | ||
9a34ec5f LP |
2579 | int sigaction_many(const struct sigaction *sa, ...) { |
2580 | va_list ap; | |
2581 | int r = 0, sig; | |
2582 | ||
2583 | va_start(ap, sa); | |
2584 | while ((sig = va_arg(ap, int)) > 0) | |
2585 | if (sigaction(sig, sa, NULL) < 0) | |
2586 | r = -errno; | |
2587 | va_end(ap); | |
2588 | ||
2589 | return r; | |
2590 | } | |
2591 | ||
2592 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2593 | struct sigaction sa; |
9a34ec5f LP |
2594 | va_list ap; |
2595 | int r = 0; | |
a337c6fc LP |
2596 | |
2597 | zero(sa); | |
2598 | sa.sa_handler = SIG_IGN; | |
2599 | sa.sa_flags = SA_RESTART; | |
2600 | ||
9a34ec5f LP |
2601 | if (sigaction(sig, &sa, NULL) < 0) |
2602 | r = -errno; | |
2603 | ||
2604 | va_start(ap, sig); | |
2605 | while ((sig = va_arg(ap, int)) > 0) | |
2606 | if (sigaction(sig, &sa, NULL) < 0) | |
2607 | r = -errno; | |
2608 | va_end(ap); | |
2609 | ||
2610 | return r; | |
2611 | } | |
2612 | ||
2613 | int default_signals(int sig, ...) { | |
2614 | struct sigaction sa; | |
2615 | va_list ap; | |
2616 | int r = 0; | |
2617 | ||
2618 | zero(sa); | |
2619 | sa.sa_handler = SIG_DFL; | |
2620 | sa.sa_flags = SA_RESTART; | |
2621 | ||
2622 | if (sigaction(sig, &sa, NULL) < 0) | |
2623 | r = -errno; | |
2624 | ||
2625 | va_start(ap, sig); | |
2626 | while ((sig = va_arg(ap, int)) > 0) | |
2627 | if (sigaction(sig, &sa, NULL) < 0) | |
2628 | r = -errno; | |
2629 | va_end(ap); | |
2630 | ||
2631 | return r; | |
a337c6fc LP |
2632 | } |
2633 | ||
8d567588 LP |
2634 | int close_pipe(int p[]) { |
2635 | int a = 0, b = 0; | |
2636 | ||
2637 | assert(p); | |
2638 | ||
2639 | if (p[0] >= 0) { | |
2640 | a = close_nointr(p[0]); | |
2641 | p[0] = -1; | |
2642 | } | |
2643 | ||
2644 | if (p[1] >= 0) { | |
2645 | b = close_nointr(p[1]); | |
2646 | p[1] = -1; | |
2647 | } | |
2648 | ||
2649 | return a < 0 ? a : b; | |
2650 | } | |
2651 | ||
eb22ac37 | 2652 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2653 | uint8_t *p; |
2654 | ssize_t n = 0; | |
2655 | ||
2656 | assert(fd >= 0); | |
2657 | assert(buf); | |
2658 | ||
2659 | p = buf; | |
2660 | ||
2661 | while (nbytes > 0) { | |
2662 | ssize_t k; | |
2663 | ||
2664 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2665 | ||
eb22ac37 | 2666 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2667 | continue; |
2668 | ||
eb22ac37 | 2669 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2670 | struct pollfd pollfd; |
2671 | ||
2672 | zero(pollfd); | |
2673 | pollfd.fd = fd; | |
2674 | pollfd.events = POLLIN; | |
2675 | ||
2676 | if (poll(&pollfd, 1, -1) < 0) { | |
2677 | if (errno == EINTR) | |
2678 | continue; | |
2679 | ||
2680 | return n > 0 ? n : -errno; | |
2681 | } | |
2682 | ||
2683 | if (pollfd.revents != POLLIN) | |
2684 | return n > 0 ? n : -EIO; | |
2685 | ||
2686 | continue; | |
2687 | } | |
2688 | ||
2689 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2690 | } | |
2691 | ||
2692 | p += k; | |
2693 | nbytes -= k; | |
2694 | n += k; | |
2695 | } | |
2696 | ||
2697 | return n; | |
2698 | } | |
2699 | ||
eb22ac37 LP |
2700 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2701 | const uint8_t *p; | |
2702 | ssize_t n = 0; | |
2703 | ||
2704 | assert(fd >= 0); | |
2705 | assert(buf); | |
2706 | ||
2707 | p = buf; | |
2708 | ||
2709 | while (nbytes > 0) { | |
2710 | ssize_t k; | |
2711 | ||
fe652127 LP |
2712 | k = write(fd, p, nbytes); |
2713 | if (k <= 0) { | |
eb22ac37 LP |
2714 | |
2715 | if (k < 0 && errno == EINTR) | |
2716 | continue; | |
2717 | ||
2718 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2719 | struct pollfd pollfd; | |
2720 | ||
2721 | zero(pollfd); | |
2722 | pollfd.fd = fd; | |
2723 | pollfd.events = POLLOUT; | |
2724 | ||
2725 | if (poll(&pollfd, 1, -1) < 0) { | |
2726 | if (errno == EINTR) | |
2727 | continue; | |
2728 | ||
2729 | return n > 0 ? n : -errno; | |
2730 | } | |
2731 | ||
2732 | if (pollfd.revents != POLLOUT) | |
2733 | return n > 0 ? n : -EIO; | |
2734 | ||
2735 | continue; | |
2736 | } | |
2737 | ||
2738 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2739 | } | |
2740 | ||
2741 | p += k; | |
2742 | nbytes -= k; | |
2743 | n += k; | |
2744 | } | |
2745 | ||
2746 | return n; | |
2747 | } | |
2748 | ||
24a6e4a4 LP |
2749 | int parse_usec(const char *t, usec_t *usec) { |
2750 | static const struct { | |
2751 | const char *suffix; | |
2752 | usec_t usec; | |
2753 | } table[] = { | |
cfbc22ab LP |
2754 | { "seconds", USEC_PER_SEC }, |
2755 | { "second", USEC_PER_SEC }, | |
24a6e4a4 LP |
2756 | { "sec", USEC_PER_SEC }, |
2757 | { "s", USEC_PER_SEC }, | |
cfbc22ab LP |
2758 | { "minutes", USEC_PER_MINUTE }, |
2759 | { "minute", USEC_PER_MINUTE }, | |
24a6e4a4 | 2760 | { "min", USEC_PER_MINUTE }, |
cfbc22ab LP |
2761 | { "months", USEC_PER_MONTH }, |
2762 | { "month", USEC_PER_MONTH }, | |
2763 | { "msec", USEC_PER_MSEC }, | |
2764 | { "ms", USEC_PER_MSEC }, | |
2765 | { "m", USEC_PER_MINUTE }, | |
2766 | { "hours", USEC_PER_HOUR }, | |
2767 | { "hour", USEC_PER_HOUR }, | |
24a6e4a4 LP |
2768 | { "hr", USEC_PER_HOUR }, |
2769 | { "h", USEC_PER_HOUR }, | |
cfbc22ab LP |
2770 | { "days", USEC_PER_DAY }, |
2771 | { "day", USEC_PER_DAY }, | |
24a6e4a4 | 2772 | { "d", USEC_PER_DAY }, |
cfbc22ab LP |
2773 | { "weeks", USEC_PER_WEEK }, |
2774 | { "week", USEC_PER_WEEK }, | |
24a6e4a4 | 2775 | { "w", USEC_PER_WEEK }, |
cfbc22ab LP |
2776 | { "years", USEC_PER_YEAR }, |
2777 | { "year", USEC_PER_YEAR }, | |
2778 | { "y", USEC_PER_YEAR }, | |
24a6e4a4 LP |
2779 | { "usec", 1ULL }, |
2780 | { "us", 1ULL }, | |
d88a251b | 2781 | { "", USEC_PER_SEC }, /* default is sec */ |
24a6e4a4 LP |
2782 | }; |
2783 | ||
2784 | const char *p; | |
2785 | usec_t r = 0; | |
2786 | ||
2787 | assert(t); | |
2788 | assert(usec); | |
2789 | ||
2790 | p = t; | |
2791 | do { | |
2792 | long long l; | |
2793 | char *e; | |
2794 | unsigned i; | |
2795 | ||
2796 | errno = 0; | |
2797 | l = strtoll(p, &e, 10); | |
2798 | ||
2799 | if (errno != 0) | |
2800 | return -errno; | |
2801 | ||
2802 | if (l < 0) | |
2803 | return -ERANGE; | |
2804 | ||
2805 | if (e == p) | |
2806 | return -EINVAL; | |
2807 | ||
2808 | e += strspn(e, WHITESPACE); | |
2809 | ||
2810 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2811 | if (startswith(e, table[i].suffix)) { | |
2812 | r += (usec_t) l * table[i].usec; | |
2813 | p = e + strlen(table[i].suffix); | |
2814 | break; | |
2815 | } | |
2816 | ||
2817 | if (i >= ELEMENTSOF(table)) | |
2818 | return -EINVAL; | |
2819 | ||
2820 | } while (*p != 0); | |
2821 | ||
2822 | *usec = r; | |
2823 | ||
2824 | return 0; | |
2825 | } | |
2826 | ||
d88a251b LP |
2827 | int parse_nsec(const char *t, nsec_t *nsec) { |
2828 | static const struct { | |
2829 | const char *suffix; | |
2830 | nsec_t nsec; | |
2831 | } table[] = { | |
cfbc22ab LP |
2832 | { "seconds", NSEC_PER_SEC }, |
2833 | { "second", NSEC_PER_SEC }, | |
d88a251b LP |
2834 | { "sec", NSEC_PER_SEC }, |
2835 | { "s", NSEC_PER_SEC }, | |
cfbc22ab LP |
2836 | { "minutes", NSEC_PER_MINUTE }, |
2837 | { "minute", NSEC_PER_MINUTE }, | |
d88a251b | 2838 | { "min", NSEC_PER_MINUTE }, |
cfbc22ab LP |
2839 | { "months", NSEC_PER_MONTH }, |
2840 | { "month", NSEC_PER_MONTH }, | |
2841 | { "msec", NSEC_PER_MSEC }, | |
2842 | { "ms", NSEC_PER_MSEC }, | |
2843 | { "m", NSEC_PER_MINUTE }, | |
2844 | { "hours", NSEC_PER_HOUR }, | |
2845 | { "hour", NSEC_PER_HOUR }, | |
d88a251b LP |
2846 | { "hr", NSEC_PER_HOUR }, |
2847 | { "h", NSEC_PER_HOUR }, | |
cfbc22ab LP |
2848 | { "days", NSEC_PER_DAY }, |
2849 | { "day", NSEC_PER_DAY }, | |
d88a251b | 2850 | { "d", NSEC_PER_DAY }, |
cfbc22ab LP |
2851 | { "weeks", NSEC_PER_WEEK }, |
2852 | { "week", NSEC_PER_WEEK }, | |
d88a251b | 2853 | { "w", NSEC_PER_WEEK }, |
cfbc22ab LP |
2854 | { "years", NSEC_PER_YEAR }, |
2855 | { "year", NSEC_PER_YEAR }, | |
2856 | { "y", NSEC_PER_YEAR }, | |
d88a251b LP |
2857 | { "usec", NSEC_PER_USEC }, |
2858 | { "us", NSEC_PER_USEC }, | |
2859 | { "nsec", 1ULL }, | |
2860 | { "ns", 1ULL }, | |
2861 | { "", 1ULL }, /* default is nsec */ | |
2862 | }; | |
2863 | ||
2864 | const char *p; | |
2865 | nsec_t r = 0; | |
2866 | ||
2867 | assert(t); | |
2868 | assert(nsec); | |
2869 | ||
2870 | p = t; | |
2871 | do { | |
2872 | long long l; | |
2873 | char *e; | |
2874 | unsigned i; | |
2875 | ||
2876 | errno = 0; | |
2877 | l = strtoll(p, &e, 10); | |
2878 | ||
2879 | if (errno != 0) | |
2880 | return -errno; | |
2881 | ||
2882 | if (l < 0) | |
2883 | return -ERANGE; | |
2884 | ||
2885 | if (e == p) | |
2886 | return -EINVAL; | |
2887 | ||
2888 | e += strspn(e, WHITESPACE); | |
2889 | ||
2890 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2891 | if (startswith(e, table[i].suffix)) { | |
2892 | r += (nsec_t) l * table[i].nsec; | |
2893 | p = e + strlen(table[i].suffix); | |
2894 | break; | |
2895 | } | |
2896 | ||
2897 | if (i >= ELEMENTSOF(table)) | |
2898 | return -EINVAL; | |
2899 | ||
2900 | } while (*p != 0); | |
2901 | ||
2902 | *nsec = r; | |
2903 | ||
2904 | return 0; | |
2905 | } | |
2906 | ||
ab1f0633 LP |
2907 | int parse_bytes(const char *t, off_t *bytes) { |
2908 | static const struct { | |
2909 | const char *suffix; | |
2910 | off_t factor; | |
2911 | } table[] = { | |
2912 | { "B", 1 }, | |
2913 | { "K", 1024ULL }, | |
2914 | { "M", 1024ULL*1024ULL }, | |
2915 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2916 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2917 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2918 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2919 | { "", 1 }, |
2920 | }; | |
2921 | ||
2922 | const char *p; | |
2923 | off_t r = 0; | |
2924 | ||
2925 | assert(t); | |
2926 | assert(bytes); | |
2927 | ||
2928 | p = t; | |
2929 | do { | |
2930 | long long l; | |
2931 | char *e; | |
2932 | unsigned i; | |
2933 | ||
2934 | errno = 0; | |
2935 | l = strtoll(p, &e, 10); | |
2936 | ||
2937 | if (errno != 0) | |
2938 | return -errno; | |
2939 | ||
2940 | if (l < 0) | |
2941 | return -ERANGE; | |
2942 | ||
2943 | if (e == p) | |
2944 | return -EINVAL; | |
2945 | ||
2946 | e += strspn(e, WHITESPACE); | |
2947 | ||
2948 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2949 | if (startswith(e, table[i].suffix)) { | |
2950 | r += (off_t) l * table[i].factor; | |
2951 | p = e + strlen(table[i].suffix); | |
2952 | break; | |
2953 | } | |
2954 | ||
2955 | if (i >= ELEMENTSOF(table)) | |
2956 | return -EINVAL; | |
2957 | ||
2958 | } while (*p != 0); | |
2959 | ||
2960 | *bytes = r; | |
2961 | ||
2962 | return 0; | |
2963 | } | |
2964 | ||
843d2643 LP |
2965 | int make_stdio(int fd) { |
2966 | int r, s, t; | |
2967 | ||
2968 | assert(fd >= 0); | |
2969 | ||
73836c5c LP |
2970 | r = dup3(fd, STDIN_FILENO, 0); |
2971 | s = dup3(fd, STDOUT_FILENO, 0); | |
2972 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2973 | |
2974 | if (fd >= 3) | |
2975 | close_nointr_nofail(fd); | |
2976 | ||
2977 | if (r < 0 || s < 0 || t < 0) | |
2978 | return -errno; | |
2979 | ||
73836c5c | 2980 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2981 | |
843d2643 LP |
2982 | return 0; |
2983 | } | |
2984 | ||
ade509ce LP |
2985 | int make_null_stdio(void) { |
2986 | int null_fd; | |
2987 | ||
cd3bd60a LP |
2988 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2989 | if (null_fd < 0) | |
ade509ce LP |
2990 | return -errno; |
2991 | ||
2992 | return make_stdio(null_fd); | |
2993 | } | |
2994 | ||
8407a5d0 LP |
2995 | bool is_device_path(const char *path) { |
2996 | ||
2997 | /* Returns true on paths that refer to a device, either in | |
2998 | * sysfs or in /dev */ | |
2999 | ||
3000 | return | |
3001 | path_startswith(path, "/dev/") || | |
3002 | path_startswith(path, "/sys/"); | |
3003 | } | |
3004 | ||
01f78473 | 3005 | int dir_is_empty(const char *path) { |
a05f97b3 | 3006 | _cleanup_closedir_ DIR *d; |
01f78473 | 3007 | int r; |
01f78473 | 3008 | |
a05f97b3 LP |
3009 | d = opendir(path); |
3010 | if (!d) | |
01f78473 LP |
3011 | return -errno; |
3012 | ||
3013 | for (;;) { | |
7d5e9c0f LP |
3014 | struct dirent *de; |
3015 | union dirent_storage buf; | |
01f78473 | 3016 | |
7d5e9c0f | 3017 | r = readdir_r(d, &buf.de, &de); |
a05f97b3 LP |
3018 | if (r > 0) |
3019 | return -r; | |
01f78473 | 3020 | |
a05f97b3 LP |
3021 | if (!de) |
3022 | return 1; | |
01f78473 | 3023 | |
a05f97b3 LP |
3024 | if (!ignore_file(de->d_name)) |
3025 | return 0; | |
3026 | } | |
01f78473 LP |
3027 | } |
3028 | ||
d3782d60 | 3029 | unsigned long long random_ull(void) { |
a05f97b3 | 3030 | _cleanup_close_ int fd; |
d3782d60 LP |
3031 | uint64_t ull; |
3032 | ssize_t r; | |
3033 | ||
ac0930c8 LP |
3034 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
3035 | if (fd < 0) | |
d3782d60 LP |
3036 | goto fallback; |
3037 | ||
eb22ac37 | 3038 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
3039 | if (r != sizeof(ull)) |
3040 | goto fallback; | |
3041 | ||
3042 | return ull; | |
3043 | ||
3044 | fallback: | |
3045 | return random() * RAND_MAX + random(); | |
3046 | } | |
3047 | ||
5b6319dc LP |
3048 | void rename_process(const char name[8]) { |
3049 | assert(name); | |
3050 | ||
5d6b1584 LP |
3051 | /* This is a like a poor man's setproctitle(). It changes the |
3052 | * comm field, argv[0], and also the glibc's internally used | |
3053 | * name of the process. For the first one a limit of 16 chars | |
3054 | * applies, to the second one usually one of 10 (i.e. length | |
3055 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
3056 | * "systemd"). If you pass a longer string it will be | |
3057 | * truncated */ | |
5b6319dc | 3058 | |
5d6b1584 | 3059 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
3060 | |
3061 | if (program_invocation_name) | |
3062 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
3063 | |
3064 | if (saved_argc > 0) { | |
3065 | int i; | |
3066 | ||
3067 | if (saved_argv[0]) | |
3068 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
3069 | ||
3070 | for (i = 1; i < saved_argc; i++) { | |
3071 | if (!saved_argv[i]) | |
3072 | break; | |
3073 | ||
3074 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
3075 | } | |
3076 | } | |
5b6319dc LP |
3077 | } |
3078 | ||
7d793605 LP |
3079 | void sigset_add_many(sigset_t *ss, ...) { |
3080 | va_list ap; | |
3081 | int sig; | |
3082 | ||
3083 | assert(ss); | |
3084 | ||
3085 | va_start(ap, ss); | |
3086 | while ((sig = va_arg(ap, int)) > 0) | |
3087 | assert_se(sigaddset(ss, sig) == 0); | |
3088 | va_end(ap); | |
3089 | } | |
3090 | ||
ef2f1067 LP |
3091 | char* gethostname_malloc(void) { |
3092 | struct utsname u; | |
3093 | ||
3094 | assert_se(uname(&u) >= 0); | |
3095 | ||
344de609 | 3096 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
3097 | return strdup(u.nodename); |
3098 | ||
3099 | return strdup(u.sysname); | |
3100 | } | |
3101 | ||
344de609 LP |
3102 | bool hostname_is_set(void) { |
3103 | struct utsname u; | |
3104 | ||
3105 | assert_se(uname(&u) >= 0); | |
3106 | ||
3107 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
3108 | } | |
3109 | ||
7c5f152a | 3110 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 3111 | long bufsize; |
a05f97b3 LP |
3112 | char *name; |
3113 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 3114 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
3115 | |
3116 | /* Shortcut things to avoid NSS lookups */ | |
3117 | if (uid == 0) | |
3118 | return strdup("root"); | |
3119 | ||
7c5f152a LP |
3120 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
3121 | if (bufsize <= 0) | |
ef2f1067 LP |
3122 | bufsize = 4096; |
3123 | ||
7c5f152a LP |
3124 | buf = malloc(bufsize); |
3125 | if (!buf) | |
ef2f1067 LP |
3126 | return NULL; |
3127 | ||
a05f97b3 LP |
3128 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
3129 | return strdup(pw->pw_name); | |
ef2f1067 LP |
3130 | |
3131 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
3132 | return NULL; | |
3133 | ||
3134 | return name; | |
3135 | } | |
3136 | ||
7c5f152a LP |
3137 | char* getlogname_malloc(void) { |
3138 | uid_t uid; | |
3139 | struct stat st; | |
3140 | ||
3141 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
3142 | uid = st.st_uid; | |
3143 | else | |
3144 | uid = getuid(); | |
3145 | ||
3146 | return lookup_uid(uid); | |
3147 | } | |
3148 | ||
3149 | char *getusername_malloc(void) { | |
3150 | const char *e; | |
3151 | ||
3152 | e = getenv("USER"); | |
3153 | if (e) | |
3154 | return strdup(e); | |
3155 | ||
3156 | return lookup_uid(getuid()); | |
3157 | } | |
3158 | ||
fc116c6a LP |
3159 | int getttyname_malloc(int fd, char **r) { |
3160 | char path[PATH_MAX], *c; | |
618e02c7 | 3161 | int k; |
8c6db833 LP |
3162 | |
3163 | assert(r); | |
ef2f1067 | 3164 | |
a05f97b3 LP |
3165 | k = ttyname_r(fd, path, sizeof(path)); |
3166 | if (k != 0) | |
618e02c7 | 3167 | return -k; |
ef2f1067 LP |
3168 | |
3169 | char_array_0(path); | |
3170 | ||
a05f97b3 LP |
3171 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
3172 | if (!c) | |
8c6db833 LP |
3173 | return -ENOMEM; |
3174 | ||
3175 | *r = c; | |
3176 | return 0; | |
3177 | } | |
3178 | ||
fc116c6a LP |
3179 | int getttyname_harder(int fd, char **r) { |
3180 | int k; | |
3181 | char *s; | |
3182 | ||
a05f97b3 LP |
3183 | k = getttyname_malloc(fd, &s); |
3184 | if (k < 0) | |
fc116c6a LP |
3185 | return k; |
3186 | ||
3187 | if (streq(s, "tty")) { | |
3188 | free(s); | |
4d6d6518 | 3189 | return get_ctty(0, NULL, r); |
fc116c6a LP |
3190 | } |
3191 | ||
3192 | *r = s; | |
3193 | return 0; | |
3194 | } | |
3195 | ||
4d6d6518 | 3196 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
fc116c6a | 3197 | int k; |
4d6d6518 | 3198 | char line[LINE_MAX], *p, *fn; |
fc116c6a LP |
3199 | unsigned long ttynr; |
3200 | FILE *f; | |
3201 | ||
4d6d6518 LP |
3202 | if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0) |
3203 | return -ENOMEM; | |
3204 | ||
3205 | f = fopen(fn, "re"); | |
3206 | free(fn); | |
3207 | if (!f) | |
fc116c6a LP |
3208 | return -errno; |
3209 | ||
4d6d6518 | 3210 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 3211 | k = feof(f) ? -EIO : -errno; |
fc116c6a LP |
3212 | fclose(f); |
3213 | return k; | |
3214 | } | |
3215 | ||
3216 | fclose(f); | |
3217 | ||
4d6d6518 LP |
3218 | p = strrchr(line, ')'); |
3219 | if (!p) | |
fc116c6a LP |
3220 | return -EIO; |
3221 | ||
3222 | p++; | |
3223 | ||
3224 | if (sscanf(p, " " | |
3225 | "%*c " /* state */ | |
3226 | "%*d " /* ppid */ | |
3227 | "%*d " /* pgrp */ | |
3228 | "%*d " /* session */ | |
3229 | "%lu ", /* ttynr */ | |
3230 | &ttynr) != 1) | |
3231 | return -EIO; | |
3232 | ||
3233 | *d = (dev_t) ttynr; | |
3234 | return 0; | |
3235 | } | |
3236 | ||
4d6d6518 | 3237 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 3238 | int k; |
20c03b7b | 3239 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
3240 | dev_t devnr; |
3241 | ||
3242 | assert(r); | |
3243 | ||
4d6d6518 LP |
3244 | k = get_ctty_devnr(pid, &devnr); |
3245 | if (k < 0) | |
fc116c6a LP |
3246 | return k; |
3247 | ||
3248 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
3249 | char_array_0(fn); | |
3250 | ||
3251 | if ((k = readlink_malloc(fn, &s)) < 0) { | |
3252 | ||
3253 | if (k != -ENOENT) | |
3254 | return k; | |
3255 | ||
46824d0e LP |
3256 | /* This is an ugly hack */ |
3257 | if (major(devnr) == 136) { | |
3258 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
3259 | return -ENOMEM; | |
3260 | ||
3261 | *r = b; | |
3262 | if (_devnr) | |
3263 | *_devnr = devnr; | |
3264 | ||
3265 | return 0; | |
3266 | } | |
3267 | ||
fc116c6a LP |
3268 | /* Probably something like the ptys which have no |
3269 | * symlink in /dev/char. Let's return something | |
3270 | * vaguely useful. */ | |
3271 | ||
3272 | if (!(b = strdup(fn + 5))) | |
3273 | return -ENOMEM; | |
3274 | ||
3275 | *r = b; | |
46824d0e LP |
3276 | if (_devnr) |
3277 | *_devnr = devnr; | |
3278 | ||
fc116c6a LP |
3279 | return 0; |
3280 | } | |
3281 | ||
3282 | if (startswith(s, "/dev/")) | |
3283 | p = s + 5; | |
3284 | else if (startswith(s, "../")) | |
3285 | p = s + 3; | |
3286 | else | |
3287 | p = s; | |
3288 | ||
3289 | b = strdup(p); | |
3290 | free(s); | |
3291 | ||
3292 | if (!b) | |
3293 | return -ENOMEM; | |
3294 | ||
3295 | *r = b; | |
46824d0e LP |
3296 | if (_devnr) |
3297 | *_devnr = devnr; | |
3298 | ||
fc116c6a LP |
3299 | return 0; |
3300 | } | |
3301 | ||
f56d5db9 | 3302 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
3303 | DIR *d; |
3304 | int ret = 0; | |
3305 | ||
3306 | assert(fd >= 0); | |
3307 | ||
3308 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 3309 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 3310 | |
d4d046e3 LP |
3311 | d = fdopendir(fd); |
3312 | if (!d) { | |
8c6db833 | 3313 | close_nointr_nofail(fd); |
4c633005 LP |
3314 | |
3315 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
3316 | } |
3317 | ||
3318 | for (;;) { | |
7d5e9c0f LP |
3319 | struct dirent *de; |
3320 | union dirent_storage buf; | |
7925c22a LP |
3321 | bool is_dir, keep_around; |
3322 | struct stat st; | |
8c6db833 LP |
3323 | int r; |
3324 | ||
7d5e9c0f | 3325 | r = readdir_r(d, &buf.de, &de); |
d4d046e3 LP |
3326 | if (r != 0 && ret == 0) { |
3327 | ret = -r; | |
8c6db833 LP |
3328 | break; |
3329 | } | |
3330 | ||
3331 | if (!de) | |
3332 | break; | |
3333 | ||
3334 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
3335 | continue; | |
3336 | ||
7925c22a LP |
3337 | if (de->d_type == DT_UNKNOWN || |
3338 | honour_sticky || | |
3339 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 3340 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 3341 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3342 | ret = -errno; |
3343 | continue; | |
3344 | } | |
3345 | ||
3346 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
3347 | keep_around = |
3348 | honour_sticky && | |
3349 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
3350 | (st.st_mode & S_ISVTX); | |
ad293f5a | 3351 | } else { |
8c6db833 | 3352 | is_dir = de->d_type == DT_DIR; |
7925c22a | 3353 | keep_around = false; |
ad293f5a | 3354 | } |
8c6db833 LP |
3355 | |
3356 | if (is_dir) { | |
3357 | int subdir_fd; | |
8c6db833 | 3358 | |
597f43c7 | 3359 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
3360 | if (root_dev && st.st_dev != root_dev->st_dev) |
3361 | continue; | |
8c6db833 | 3362 | |
7925c22a LP |
3363 | subdir_fd = openat(fd, de->d_name, |
3364 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
3365 | if (subdir_fd < 0) { | |
3366 | if (ret == 0 && errno != ENOENT) | |
3367 | ret = -errno; | |
3368 | continue; | |
3369 | } | |
3370 | ||
b3d28469 | 3371 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
3372 | if (r < 0 && ret == 0) |
3373 | ret = r; | |
3374 | ||
3375 | if (!keep_around) | |
3376 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
3377 | if (ret == 0 && errno != ENOENT) |
3378 | ret = -errno; | |
3379 | } | |
3380 | ||
3381 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
3382 | |
3383 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3384 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3385 | ret = -errno; |
3386 | } | |
3387 | } | |
3388 | } | |
3389 | ||
3390 | closedir(d); | |
3391 | ||
3392 | return ret; | |
3393 | } | |
3394 | ||
f56d5db9 LP |
3395 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
3396 | struct statfs s; | |
3397 | ||
3398 | assert(fd >= 0); | |
3399 | ||
3400 | if (fstatfs(fd, &s) < 0) { | |
3401 | close_nointr_nofail(fd); | |
3402 | return -errno; | |
3403 | } | |
3404 | ||
3405 | /* We refuse to clean disk file systems with this call. This | |
3406 | * is extra paranoia just to be sure we never ever remove | |
3407 | * non-state data */ | |
3408 | ||
3409 | if (s.f_type != TMPFS_MAGIC && | |
3410 | s.f_type != RAMFS_MAGIC) { | |
3411 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3412 | close_nointr_nofail(fd); | |
3413 | return -EPERM; | |
3414 | } | |
3415 | ||
3416 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
3417 | } | |
3418 | ||
3419 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
3420 | int fd, r; | |
3421 | struct statfs s; | |
8c6db833 LP |
3422 | |
3423 | assert(path); | |
3424 | ||
f56d5db9 LP |
3425 | /* We refuse to clean the root file system with this |
3426 | * call. This is extra paranoia to never cause a really | |
3427 | * seriously broken system. */ | |
3428 | if (path_equal(path, "/")) { | |
3429 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
3430 | return -EPERM; | |
3431 | } | |
461b1822 | 3432 | |
d4d046e3 LP |
3433 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
3434 | if (fd < 0) { | |
8c6db833 LP |
3435 | |
3436 | if (errno != ENOTDIR) | |
3437 | return -errno; | |
3438 | ||
f56d5db9 LP |
3439 | if (!dangerous) { |
3440 | if (statfs(path, &s) < 0) | |
3441 | return -errno; | |
3442 | ||
3443 | if (s.f_type != TMPFS_MAGIC && | |
3444 | s.f_type != RAMFS_MAGIC) { | |
3445 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3446 | return -EPERM; | |
3447 | } | |
3448 | } | |
3449 | ||
8c6db833 | 3450 | if (delete_root && !only_dirs) |
d4d046e3 | 3451 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
3452 | return -errno; |
3453 | ||
3454 | return 0; | |
3455 | } | |
3456 | ||
f56d5db9 LP |
3457 | if (!dangerous) { |
3458 | if (fstatfs(fd, &s) < 0) { | |
3459 | close_nointr_nofail(fd); | |
3460 | return -errno; | |
3461 | } | |
ad293f5a | 3462 | |
f56d5db9 LP |
3463 | if (s.f_type != TMPFS_MAGIC && |
3464 | s.f_type != RAMFS_MAGIC) { | |
3465 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3466 | close_nointr_nofail(fd); | |
3467 | return -EPERM; | |
3468 | } | |
3469 | } | |
3470 | ||
3471 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
3472 | if (delete_root) { |
3473 | ||
8d53b453 | 3474 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 3475 | return r; |
8c6db833 | 3476 | |
e27796a0 | 3477 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
3478 | if (r == 0) |
3479 | r = -errno; | |
3480 | } | |
ad293f5a | 3481 | } |
8c6db833 LP |
3482 | |
3483 | return r; | |
3484 | } | |
3485 | ||
f56d5db9 LP |
3486 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
3487 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
3488 | } | |
3489 | ||
3490 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
3491 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
3492 | } | |
3493 | ||
8c6db833 LP |
3494 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
3495 | assert(path); | |
3496 | ||
3497 | /* Under the assumption that we are running privileged we | |
3498 | * first change the access mode and only then hand out | |
3499 | * ownership to avoid a window where access is too open. */ | |
3500 | ||
8d53b453 LP |
3501 | if (mode != (mode_t) -1) |
3502 | if (chmod(path, mode) < 0) | |
3503 | return -errno; | |
8c6db833 | 3504 | |
8d53b453 LP |
3505 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
3506 | if (chown(path, uid, gid) < 0) | |
3507 | return -errno; | |
8c6db833 LP |
3508 | |
3509 | return 0; | |
ef2f1067 LP |
3510 | } |
3511 | ||
f4b47811 LP |
3512 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
3513 | assert(fd >= 0); | |
3514 | ||
3515 | /* Under the assumption that we are running privileged we | |
3516 | * first change the access mode and only then hand out | |
3517 | * ownership to avoid a window where access is too open. */ | |
3518 | ||
3519 | if (fchmod(fd, mode) < 0) | |
3520 | return -errno; | |
3521 | ||
3522 | if (fchown(fd, uid, gid) < 0) | |
3523 | return -errno; | |
3524 | ||
3525 | return 0; | |
3526 | } | |
3527 | ||
82c121a4 LP |
3528 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3529 | cpu_set_t *r; | |
3530 | unsigned n = 1024; | |
3531 | ||
3532 | /* Allocates the cpuset in the right size */ | |
3533 | ||
3534 | for (;;) { | |
3535 | if (!(r = CPU_ALLOC(n))) | |
3536 | return NULL; | |
3537 | ||
3538 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3539 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3540 | ||
3541 | if (ncpus) | |
3542 | *ncpus = n; | |
3543 | ||
3544 | return r; | |
3545 | } | |
3546 | ||
3547 | CPU_FREE(r); | |
3548 | ||
3549 | if (errno != EINVAL) | |
3550 | return NULL; | |
3551 | ||
3552 | n *= 2; | |
3553 | } | |
3554 | } | |
3555 | ||
669bec5d | 3556 | int status_vprintf(const char *status, bool ellipse, const char *format, va_list ap) { |
9ab7a8d2 | 3557 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
3558 | _cleanup_free_ char *s = NULL; |
3559 | _cleanup_close_ int fd = -1; | |
81beb750 LP |
3560 | struct iovec iovec[5]; |
3561 | int n = 0; | |
9e58ff9c LP |
3562 | |
3563 | assert(format); | |
3564 | ||
9ab7a8d2 | 3565 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
3566 | * optional and go exclusively to the console. */ |
3567 | ||
3568 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 3569 | return log_oom(); |
9e58ff9c | 3570 | |
67e5cc4f | 3571 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 3572 | if (fd < 0) |
669bec5d | 3573 | return fd; |
9e58ff9c | 3574 | |
67e5cc4f | 3575 | if (ellipse) { |
9ab7a8d2 MS |
3576 | char *e; |
3577 | size_t emax, sl; | |
3578 | int c; | |
3579 | ||
67e5cc4f LP |
3580 | c = fd_columns(fd); |
3581 | if (c <= 0) | |
3582 | c = 80; | |
81beb750 | 3583 | |
669bec5d | 3584 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
3585 | |
3586 | emax = c - sl - 1; | |
3587 | if (emax < 3) | |
3588 | emax = 3; | |
81beb750 | 3589 | |
67e5cc4f LP |
3590 | e = ellipsize(s, emax, 75); |
3591 | if (e) { | |
3592 | free(s); | |
3593 | s = e; | |
3594 | } | |
81beb750 LP |
3595 | } |
3596 | ||
3597 | zero(iovec); | |
81beb750 | 3598 | |
9ab7a8d2 MS |
3599 | if (status) { |
3600 | if (!isempty(status)) { | |
3601 | IOVEC_SET_STRING(iovec[n++], "["); | |
3602 | IOVEC_SET_STRING(iovec[n++], status); | |
3603 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3604 | } else | |
3605 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3606 | } |
3607 | ||
9ab7a8d2 MS |
3608 | IOVEC_SET_STRING(iovec[n++], s); |
3609 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 3610 | |
669bec5d LP |
3611 | if (writev(fd, iovec, n) < 0) |
3612 | return -errno; | |
9e58ff9c | 3613 | |
669bec5d | 3614 | return 0; |
9e58ff9c LP |
3615 | } |
3616 | ||
669bec5d | 3617 | int status_printf(const char *status, bool ellipse, const char *format, ...) { |
c846ff47 | 3618 | va_list ap; |
669bec5d | 3619 | int r; |
c846ff47 LP |
3620 | |
3621 | assert(format); | |
3622 | ||
3623 | va_start(ap, format); | |
669bec5d | 3624 | r = status_vprintf(status, ellipse, format, ap); |
c846ff47 | 3625 | va_end(ap); |
669bec5d LP |
3626 | |
3627 | return r; | |
c846ff47 LP |
3628 | } |
3629 | ||
669bec5d | 3630 | int status_welcome(void) { |
10aa7034 | 3631 | int r; |
669bec5d LP |
3632 | _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL; |
3633 | ||
3634 | r = parse_env_file("/etc/os-release", NEWLINE, | |
3635 | "PRETTY_NAME", &pretty_name, | |
3636 | "ANSI_COLOR", &ansi_color, | |
3637 | NULL); | |
3638 | if (r < 0 && r != -ENOENT) | |
3639 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3640 | ||
3641 | return status_printf(NULL, false, | |
3642 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", | |
3643 | isempty(ansi_color) ? "1" : ansi_color, | |
3644 | isempty(pretty_name) ? "Linux" : pretty_name); | |
c846ff47 LP |
3645 | } |
3646 | ||
fab56fc5 LP |
3647 | char *replace_env(const char *format, char **env) { |
3648 | enum { | |
3649 | WORD, | |
c24eb49e | 3650 | CURLY, |
fab56fc5 LP |
3651 | VARIABLE |
3652 | } state = WORD; | |
3653 | ||
3654 | const char *e, *word = format; | |
3655 | char *r = NULL, *k; | |
3656 | ||
3657 | assert(format); | |
3658 | ||
3659 | for (e = format; *e; e ++) { | |
3660 | ||
3661 | switch (state) { | |
3662 | ||
3663 | case WORD: | |
3664 | if (*e == '$') | |
c24eb49e | 3665 | state = CURLY; |
fab56fc5 LP |
3666 | break; |
3667 | ||
c24eb49e LP |
3668 | case CURLY: |
3669 | if (*e == '{') { | |
fab56fc5 LP |
3670 | if (!(k = strnappend(r, word, e-word-1))) |
3671 | goto fail; | |
3672 | ||
3673 | free(r); | |
3674 | r = k; | |
3675 | ||
3676 | word = e-1; | |
3677 | state = VARIABLE; | |
3678 | ||
3679 | } else if (*e == '$') { | |
3680 | if (!(k = strnappend(r, word, e-word))) | |
3681 | goto fail; | |
3682 | ||
3683 | free(r); | |
3684 | r = k; | |
3685 | ||
3686 | word = e+1; | |
3687 | state = WORD; | |
3688 | } else | |
3689 | state = WORD; | |
3690 | break; | |
3691 | ||
3692 | case VARIABLE: | |
c24eb49e | 3693 | if (*e == '}') { |
b95cf362 | 3694 | const char *t; |
fab56fc5 | 3695 | |
b95cf362 LP |
3696 | if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) |
3697 | t = ""; | |
fab56fc5 | 3698 | |
b95cf362 LP |
3699 | if (!(k = strappend(r, t))) |
3700 | goto fail; | |
fab56fc5 | 3701 | |
b95cf362 LP |
3702 | free(r); |
3703 | r = k; | |
fab56fc5 | 3704 | |
b95cf362 | 3705 | word = e+1; |
fab56fc5 LP |
3706 | state = WORD; |
3707 | } | |
3708 | break; | |
3709 | } | |
3710 | } | |
3711 | ||
3712 | if (!(k = strnappend(r, word, e-word))) | |
3713 | goto fail; | |
3714 | ||
3715 | free(r); | |
3716 | return k; | |
3717 | ||
3718 | fail: | |
3719 | free(r); | |
3720 | return NULL; | |
3721 | } | |
3722 | ||
3723 | char **replace_env_argv(char **argv, char **env) { | |
3724 | char **r, **i; | |
c24eb49e LP |
3725 | unsigned k = 0, l = 0; |
3726 | ||
3727 | l = strv_length(argv); | |
fab56fc5 | 3728 | |
c24eb49e | 3729 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3730 | return NULL; |
3731 | ||
3732 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3733 | |
3734 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3735 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3736 | char *e; | |
3737 | char **w, **m; | |
3738 | unsigned q; | |
c24eb49e | 3739 | |
b95cf362 | 3740 | if ((e = strv_env_get(env, *i+1))) { |
c24eb49e LP |
3741 | |
3742 | if (!(m = strv_split_quoted(e))) { | |
3743 | r[k] = NULL; | |
3744 | strv_free(r); | |
3745 | return NULL; | |
3746 | } | |
b95cf362 LP |
3747 | } else |
3748 | m = NULL; | |
c24eb49e | 3749 | |
b95cf362 LP |
3750 | q = strv_length(m); |
3751 | l = l + q - 1; | |
c24eb49e | 3752 | |
b95cf362 LP |
3753 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3754 | r[k] = NULL; | |
3755 | strv_free(r); | |
3756 | strv_free(m); | |
3757 | return NULL; | |
3758 | } | |
c24eb49e | 3759 | |
b95cf362 LP |
3760 | r = w; |
3761 | if (m) { | |
c24eb49e LP |
3762 | memcpy(r + k, m, q * sizeof(char*)); |
3763 | free(m); | |
c24eb49e | 3764 | } |
b95cf362 LP |
3765 | |
3766 | k += q; | |
3767 | continue; | |
c24eb49e LP |
3768 | } |
3769 | ||
3770 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3771 | if (!(r[k++] = replace_env(*i, env))) { |
3772 | strv_free(r); | |
3773 | return NULL; | |
3774 | } | |
3775 | } | |
3776 | ||
3777 | r[k] = NULL; | |
3778 | return r; | |
3779 | } | |
3780 | ||
81beb750 LP |
3781 | int fd_columns(int fd) { |
3782 | struct winsize ws; | |
3783 | zero(ws); | |
3784 | ||
3785 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3786 | return -errno; | |
3787 | ||
3788 | if (ws.ws_col <= 0) | |
3789 | return -EIO; | |
3790 | ||
3791 | return ws.ws_col; | |
3792 | } | |
3793 | ||
28917d7d | 3794 | unsigned columns(void) { |
fa776d8e | 3795 | const char *e; |
28917d7d | 3796 | unsigned c; |
fa776d8e | 3797 | |
28917d7d LP |
3798 | if (_likely_(cached_columns > 0)) |
3799 | return cached_columns; | |
11f96fac | 3800 | |
28917d7d LP |
3801 | c = 0; |
3802 | e = getenv("COLUMNS"); | |
3803 | if (e) | |
3804 | safe_atou(e, &c); | |
fa776d8e | 3805 | |
28917d7d LP |
3806 | if (c <= 0) |
3807 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3808 | |
28917d7d LP |
3809 | if (c <= 0) |
3810 | c = 80; | |
11f96fac | 3811 | |
28917d7d LP |
3812 | cached_columns = c; |
3813 | return c; | |
11f96fac ZJS |
3814 | } |
3815 | ||
8f2d43a0 LP |
3816 | int fd_lines(int fd) { |
3817 | struct winsize ws; | |
3818 | zero(ws); | |
3819 | ||
3820 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3821 | return -errno; | |
3822 | ||
3823 | if (ws.ws_row <= 0) | |
3824 | return -EIO; | |
3825 | ||
3826 | return ws.ws_row; | |
3827 | } | |
3828 | ||
3829 | unsigned lines(void) { | |
8f2d43a0 | 3830 | const char *e; |
ed757c0c | 3831 | unsigned l; |
8f2d43a0 | 3832 | |
ed757c0c LP |
3833 | if (_likely_(cached_lines > 0)) |
3834 | return cached_lines; | |
8f2d43a0 | 3835 | |
ed757c0c | 3836 | l = 0; |
8f2d43a0 LP |
3837 | e = getenv("LINES"); |
3838 | if (e) | |
ed757c0c | 3839 | safe_atou(e, &l); |
8f2d43a0 | 3840 | |
ed757c0c LP |
3841 | if (l <= 0) |
3842 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3843 | |
ed757c0c LP |
3844 | if (l <= 0) |
3845 | l = 24; | |
8f2d43a0 | 3846 | |
ed757c0c LP |
3847 | cached_lines = l; |
3848 | return cached_lines; | |
3849 | } | |
3850 | ||
3851 | /* intended to be used as a SIGWINCH sighandler */ | |
3852 | void columns_lines_cache_reset(int signum) { | |
3853 | cached_columns = 0; | |
3854 | cached_lines = 0; | |
3855 | } | |
3856 | ||
3857 | bool on_tty(void) { | |
3858 | static int cached_on_tty = -1; | |
3859 | ||
3860 | if (_unlikely_(cached_on_tty < 0)) | |
3861 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3862 | ||
3863 | return cached_on_tty; | |
8f2d43a0 LP |
3864 | } |
3865 | ||
b4f10a5e LP |
3866 | int running_in_chroot(void) { |
3867 | struct stat a, b; | |
3868 | ||
3869 | zero(a); | |
3870 | zero(b); | |
3871 | ||
3872 | /* Only works as root */ | |
3873 | ||
3874 | if (stat("/proc/1/root", &a) < 0) | |
3875 | return -errno; | |
3876 | ||
3877 | if (stat("/", &b) < 0) | |
3878 | return -errno; | |
3879 | ||
3880 | return | |
3881 | a.st_dev != b.st_dev || | |
3882 | a.st_ino != b.st_ino; | |
3883 | } | |
3884 | ||
72f59706 LP |
3885 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3886 | size_t x; | |
8fe914ec LP |
3887 | char *r; |
3888 | ||
3889 | assert(s); | |
3890 | assert(percent <= 100); | |
72f59706 | 3891 | assert(new_length >= 3); |
8fe914ec | 3892 | |
72f59706 LP |
3893 | if (old_length <= 3 || old_length <= new_length) |
3894 | return strndup(s, old_length); | |
8fe914ec | 3895 | |
72f59706 LP |
3896 | r = new0(char, new_length+1); |
3897 | if (!r) | |
8fe914ec LP |
3898 | return r; |
3899 | ||
72f59706 | 3900 | x = (new_length * percent) / 100; |
8fe914ec | 3901 | |
72f59706 LP |
3902 | if (x > new_length - 3) |
3903 | x = new_length - 3; | |
8fe914ec LP |
3904 | |
3905 | memcpy(r, s, x); | |
3906 | r[x] = '.'; | |
3907 | r[x+1] = '.'; | |
3908 | r[x+2] = '.'; | |
3909 | memcpy(r + x + 3, | |
72f59706 LP |
3910 | s + old_length - (new_length - x - 3), |
3911 | new_length - x - 3); | |
8fe914ec LP |
3912 | |
3913 | return r; | |
3914 | } | |
3915 | ||
72f59706 LP |
3916 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3917 | return ellipsize_mem(s, strlen(s), length, percent); | |
3918 | } | |
3919 | ||
f6144808 LP |
3920 | int touch(const char *path) { |
3921 | int fd; | |
3922 | ||
3923 | assert(path); | |
3924 | ||
73836c5c LP |
3925 | /* This just opens the file for writing, ensuring it |
3926 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3927 | * does it. */ | |
3928 | ||
3929 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3930 | if (fd < 0) | |
f6144808 LP |
3931 | return -errno; |
3932 | ||
3933 | close_nointr_nofail(fd); | |
3934 | return 0; | |
3935 | } | |
afea26ad | 3936 | |
97c4a07d | 3937 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3938 | size_t l; |
3939 | assert(s); | |
3940 | ||
73836c5c LP |
3941 | /* This is rather stupid, simply removes the heading and |
3942 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3943 | * escaping or anything. We should make this smarter one |
3944 | * day...*/ | |
73836c5c | 3945 | |
31ed59c5 LP |
3946 | l = strlen(s); |
3947 | if (l < 2) | |
11ce3427 LP |
3948 | return strdup(s); |
3949 | ||
97c4a07d | 3950 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3951 | return strndup(s+1, l-2); |
3952 | ||
3953 | return strdup(s); | |
3954 | } | |
3955 | ||
5f7c426e | 3956 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3957 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3958 | char *eq, *r; | |
5f7c426e | 3959 | |
57f30678 LP |
3960 | eq = strchr(s, '='); |
3961 | if (!eq) { | |
3962 | char *t; | |
5f7c426e | 3963 | |
57f30678 LP |
3964 | r = strdup(s); |
3965 | if (!r) | |
5f7c426e LP |
3966 | return NULL; |
3967 | ||
57f30678 LP |
3968 | t = strstrip(r); |
3969 | if (t == r) | |
3970 | return r; | |
3971 | ||
3972 | memmove(r, t, strlen(t) + 1); | |
3973 | return r; | |
5f7c426e LP |
3974 | } |
3975 | ||
57f30678 LP |
3976 | name = strndup(s, eq - s); |
3977 | if (!name) | |
5f7c426e LP |
3978 | return NULL; |
3979 | ||
57f30678 LP |
3980 | p = strdup(eq + 1); |
3981 | if (!p) | |
5f7c426e | 3982 | return NULL; |
5f7c426e LP |
3983 | |
3984 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3985 | if (!value) |
5f7c426e | 3986 | return NULL; |
5f7c426e | 3987 | |
57f30678 | 3988 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3989 | r = NULL; |
3990 | ||
5f7c426e LP |
3991 | return r; |
3992 | } | |
3993 | ||
8e12a6ae | 3994 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3995 | siginfo_t dummy; |
3996 | ||
2e78aa99 | 3997 | assert(pid >= 1); |
1968a360 LP |
3998 | |
3999 | if (!status) | |
4000 | status = &dummy; | |
2e78aa99 LP |
4001 | |
4002 | for (;;) { | |
8e12a6ae LP |
4003 | zero(*status); |
4004 | ||
4005 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
4006 | |
4007 | if (errno == EINTR) | |
4008 | continue; | |
4009 | ||
4010 | return -errno; | |
4011 | } | |
4012 | ||
4013 | return 0; | |
4014 | } | |
4015 | } | |
4016 | ||
97c4a07d LP |
4017 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
4018 | int r; | |
4019 | siginfo_t status; | |
4020 | ||
4021 | assert(name); | |
4022 | assert(pid > 1); | |
4023 | ||
d87be9b0 LP |
4024 | r = wait_for_terminate(pid, &status); |
4025 | if (r < 0) { | |
97c4a07d LP |
4026 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
4027 | return r; | |
4028 | } | |
4029 | ||
4030 | if (status.si_code == CLD_EXITED) { | |
4031 | if (status.si_status != 0) { | |
4032 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 4033 | return status.si_status; |
97c4a07d LP |
4034 | } |
4035 | ||
4036 | log_debug("%s succeeded.", name); | |
4037 | return 0; | |
4038 | ||
4039 | } else if (status.si_code == CLD_KILLED || | |
4040 | status.si_code == CLD_DUMPED) { | |
4041 | ||
4042 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
4043 | return -EPROTO; | |
4044 | } | |
4045 | ||
4046 | log_warning("%s failed due to unknown reason.", name); | |
4047 | return -EPROTO; | |
97c4a07d LP |
4048 | } |
4049 | ||
6a39419f | 4050 | _noreturn_ void freeze(void) { |
720ce21d LP |
4051 | |
4052 | /* Make sure nobody waits for us on a socket anymore */ | |
4053 | close_all_fds(NULL, 0); | |
4054 | ||
c29597a1 LP |
4055 | sync(); |
4056 | ||
3c14d26c LP |
4057 | for (;;) |
4058 | pause(); | |
4059 | } | |
4060 | ||
00dc5d76 LP |
4061 | bool null_or_empty(struct stat *st) { |
4062 | assert(st); | |
4063 | ||
4064 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
4065 | return true; | |
4066 | ||
c8f26f42 | 4067 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
4068 | return true; |
4069 | ||
4070 | return false; | |
4071 | } | |
4072 | ||
83096483 LP |
4073 | int null_or_empty_path(const char *fn) { |
4074 | struct stat st; | |
4075 | ||
4076 | assert(fn); | |
4077 | ||
4078 | if (stat(fn, &st) < 0) | |
4079 | return -errno; | |
4080 | ||
4081 | return null_or_empty(&st); | |
4082 | } | |
4083 | ||
a247755d | 4084 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
4085 | int nfd; |
4086 | DIR *d; | |
4087 | ||
73836c5c LP |
4088 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags); |
4089 | if (nfd < 0) | |
c4731d11 LP |
4090 | return NULL; |
4091 | ||
73836c5c LP |
4092 | d = fdopendir(nfd); |
4093 | if (!d) { | |
c4731d11 LP |
4094 | close_nointr_nofail(nfd); |
4095 | return NULL; | |
4096 | } | |
4097 | ||
4098 | return d; | |
3b63d2d3 LP |
4099 | } |
4100 | ||
8a0867d6 LP |
4101 | int signal_from_string_try_harder(const char *s) { |
4102 | int signo; | |
4103 | assert(s); | |
4104 | ||
73836c5c LP |
4105 | signo = signal_from_string(s); |
4106 | if (signo <= 0) | |
8a0867d6 LP |
4107 | if (startswith(s, "SIG")) |
4108 | return signal_from_string(s+3); | |
4109 | ||
4110 | return signo; | |
4111 | } | |
4112 | ||
10717a1a LP |
4113 | void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { |
4114 | ||
4115 | assert(f); | |
4116 | assert(name); | |
4117 | assert(t); | |
4118 | ||
4119 | if (!dual_timestamp_is_set(t)) | |
4120 | return; | |
4121 | ||
4122 | fprintf(f, "%s=%llu %llu\n", | |
4123 | name, | |
4124 | (unsigned long long) t->realtime, | |
4125 | (unsigned long long) t->monotonic); | |
4126 | } | |
4127 | ||
799fd0fd | 4128 | void dual_timestamp_deserialize(const char *value, dual_timestamp *t) { |
10717a1a LP |
4129 | unsigned long long a, b; |
4130 | ||
10717a1a LP |
4131 | assert(value); |
4132 | assert(t); | |
4133 | ||
4134 | if (sscanf(value, "%lli %llu", &a, &b) != 2) | |
4135 | log_debug("Failed to parse finish timestamp value %s", value); | |
4136 | else { | |
4137 | t->realtime = a; | |
4138 | t->monotonic = b; | |
4139 | } | |
4140 | } | |
4141 | ||
383182b5 | 4142 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
e23a0ce8 LP |
4143 | char *dn, *t, *u; |
4144 | int r; | |
4145 | ||
4146 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
4147 | * UTF8 chars unescaped */ | |
4148 | ||
383182b5 DR |
4149 | u = unquote(tagvalue, "\"\'"); |
4150 | if (u == NULL) | |
4151 | return NULL; | |
e23a0ce8 | 4152 | |
383182b5 DR |
4153 | t = xescape(u, "/ "); |
4154 | free(u); | |
e23a0ce8 | 4155 | |
383182b5 DR |
4156 | if (t == NULL) |
4157 | return NULL; | |
e23a0ce8 | 4158 | |
383182b5 DR |
4159 | r = asprintf(&dn, "/dev/disk/by-%s/%s", by, t); |
4160 | free(t); | |
e23a0ce8 | 4161 | |
383182b5 DR |
4162 | if (r < 0) |
4163 | return NULL; | |
e23a0ce8 | 4164 | |
383182b5 DR |
4165 | return dn; |
4166 | } | |
e23a0ce8 | 4167 | |
383182b5 | 4168 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
4169 | assert(p); |
4170 | ||
383182b5 DR |
4171 | if (startswith(p, "LABEL=")) |
4172 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 4173 | |
383182b5 DR |
4174 | if (startswith(p, "UUID=")) |
4175 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 4176 | |
84cc2abf DR |
4177 | if (startswith(p, "PARTUUID=")) |
4178 | return tag_to_udev_node(p+9, "partuuid"); | |
4179 | ||
4180 | if (startswith(p, "PARTLABEL=")) | |
4181 | return tag_to_udev_node(p+10, "partlabel"); | |
4182 | ||
e23a0ce8 LP |
4183 | return strdup(p); |
4184 | } | |
4185 | ||
f212ac12 LP |
4186 | bool tty_is_vc(const char *tty) { |
4187 | assert(tty); | |
4188 | ||
4189 | if (startswith(tty, "/dev/")) | |
4190 | tty += 5; | |
4191 | ||
98a28fef LP |
4192 | return vtnr_from_tty(tty) >= 0; |
4193 | } | |
4194 | ||
d1122ad5 LP |
4195 | bool tty_is_console(const char *tty) { |
4196 | assert(tty); | |
4197 | ||
4198 | if (startswith(tty, "/dev/")) | |
4199 | tty += 5; | |
4200 | ||
4201 | return streq(tty, "console"); | |
4202 | } | |
4203 | ||
98a28fef LP |
4204 | int vtnr_from_tty(const char *tty) { |
4205 | int i, r; | |
4206 | ||
4207 | assert(tty); | |
4208 | ||
4209 | if (startswith(tty, "/dev/")) | |
4210 | tty += 5; | |
4211 | ||
4212 | if (!startswith(tty, "tty") ) | |
4213 | return -EINVAL; | |
4214 | ||
4215 | if (tty[3] < '0' || tty[3] > '9') | |
4216 | return -EINVAL; | |
4217 | ||
4218 | r = safe_atoi(tty+3, &i); | |
4219 | if (r < 0) | |
4220 | return r; | |
4221 | ||
4222 | if (i < 0 || i > 63) | |
4223 | return -EINVAL; | |
4224 | ||
4225 | return i; | |
f212ac12 LP |
4226 | } |
4227 | ||
3043935f | 4228 | bool tty_is_vc_resolve(const char *tty) { |
3030ccd7 | 4229 | char *active = NULL; |
3043935f | 4230 | bool b; |
3030ccd7 | 4231 | |
e3aa71c3 LP |
4232 | assert(tty); |
4233 | ||
4234 | if (startswith(tty, "/dev/")) | |
4235 | tty += 5; | |
4236 | ||
3d9a4122 LP |
4237 | /* Resolve where /dev/console is pointing to, if /sys is |
4238 | * actually ours (i.e. not read-only-mounted which is a sign | |
4239 | * for container setups) */ | |
4240 | if (streq(tty, "console") && path_is_read_only_fs("/sys") <= 0) | |
3030ccd7 | 4241 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { |
079a09fb LP |
4242 | /* If multiple log outputs are configured the |
4243 | * last one is what /dev/console points to */ | |
3043935f LP |
4244 | tty = strrchr(active, ' '); |
4245 | if (tty) | |
079a09fb LP |
4246 | tty++; |
4247 | else | |
4248 | tty = active; | |
3030ccd7 LP |
4249 | } |
4250 | ||
3043935f | 4251 | b = tty_is_vc(tty); |
3030ccd7 | 4252 | free(active); |
e3aa71c3 | 4253 | |
3043935f LP |
4254 | return b; |
4255 | } | |
4256 | ||
4257 | const char *default_term_for_tty(const char *tty) { | |
4258 | assert(tty); | |
4259 | ||
acda6a05 | 4260 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
4261 | } |
4262 | ||
87d2c1ff | 4263 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
4264 | assert(de); |
4265 | ||
4266 | if (ignore_file(de->d_name)) | |
4267 | return false; | |
4268 | ||
4269 | if (de->d_type != DT_REG && | |
4270 | de->d_type != DT_LNK && | |
4271 | de->d_type != DT_UNKNOWN) | |
4272 | return false; | |
4273 | ||
4274 | return true; | |
4275 | } | |
4276 | ||
87d2c1ff LP |
4277 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
4278 | assert(de); | |
4279 | ||
a228a22f LP |
4280 | if (de->d_type != DT_REG && |
4281 | de->d_type != DT_LNK && | |
4282 | de->d_type != DT_UNKNOWN) | |
4283 | return false; | |
4284 | ||
4285 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
4286 | return false; |
4287 | ||
4288 | return endswith(de->d_name, suffix); | |
4289 | } | |
4290 | ||
83cc030f LP |
4291 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
4292 | DIR *_d = NULL; | |
4293 | struct dirent *de; | |
4294 | Hashmap *pids = NULL; | |
4295 | ||
4296 | assert(directory); | |
4297 | ||
4298 | /* Executes all binaries in a directory in parallel and waits | |
4299 | * until all they all finished. */ | |
4300 | ||
4301 | if (!d) { | |
4302 | if (!(_d = opendir(directory))) { | |
4303 | ||
4304 | if (errno == ENOENT) | |
4305 | return; | |
4306 | ||
4307 | log_error("Failed to enumerate directory %s: %m", directory); | |
4308 | return; | |
4309 | } | |
4310 | ||
4311 | d = _d; | |
4312 | } | |
4313 | ||
4314 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
4315 | log_error("Failed to allocate set."); | |
4316 | goto finish; | |
4317 | } | |
4318 | ||
4319 | while ((de = readdir(d))) { | |
4320 | char *path; | |
4321 | pid_t pid; | |
4322 | int k; | |
4323 | ||
fb19a739 | 4324 | if (!dirent_is_file(de)) |
83cc030f LP |
4325 | continue; |
4326 | ||
4327 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 4328 | log_oom(); |
83cc030f LP |
4329 | continue; |
4330 | } | |
4331 | ||
4332 | if ((pid = fork()) < 0) { | |
4333 | log_error("Failed to fork: %m"); | |
4334 | free(path); | |
4335 | continue; | |
4336 | } | |
4337 | ||
4338 | if (pid == 0) { | |
4339 | char *_argv[2]; | |
4340 | /* Child */ | |
4341 | ||
4342 | if (!argv) { | |
4343 | _argv[0] = path; | |
4344 | _argv[1] = NULL; | |
4345 | argv = _argv; | |
4346 | } else | |
6edd7d0a | 4347 | argv[0] = path; |
83cc030f LP |
4348 | |
4349 | execv(path, argv); | |
4350 | ||
4351 | log_error("Failed to execute %s: %m", path); | |
4352 | _exit(EXIT_FAILURE); | |
4353 | } | |
4354 | ||
4355 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
4356 | ||
4357 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
4358 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
4359 | free(path); | |
4360 | } | |
4361 | } | |
4362 | ||
4363 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 4364 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
83cc030f LP |
4365 | siginfo_t si; |
4366 | char *path; | |
4367 | ||
4368 | zero(si); | |
ec3f9b53 | 4369 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
4370 | |
4371 | if (errno == EINTR) | |
4372 | continue; | |
4373 | ||
4374 | log_error("waitid() failed: %m"); | |
4375 | goto finish; | |
4376 | } | |
4377 | ||
4378 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 4379 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
4380 | if (si.si_code == CLD_EXITED) |
4381 | log_error("%s exited with exit status %i.", path, si.si_status); | |
4382 | else | |
4383 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
4384 | } else | |
4385 | log_debug("%s exited successfully.", path); | |
4386 | ||
4387 | free(path); | |
4388 | } | |
4389 | } | |
4390 | ||
4391 | finish: | |
4392 | if (_d) | |
4393 | closedir(_d); | |
4394 | ||
4395 | if (pids) | |
4396 | hashmap_free_free(pids); | |
4397 | } | |
4398 | ||
430c18ed LP |
4399 | int kill_and_sigcont(pid_t pid, int sig) { |
4400 | int r; | |
4401 | ||
4402 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4403 | ||
4404 | if (r >= 0) | |
4405 | kill(pid, SIGCONT); | |
4406 | ||
4407 | return r; | |
4408 | } | |
4409 | ||
05feefe0 LP |
4410 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4411 | const char *i; | |
4412 | ||
4413 | if (!nulstr) | |
4414 | return false; | |
4415 | ||
4416 | NULSTR_FOREACH(i, nulstr) | |
4417 | if (streq(i, needle)) | |
4418 | return true; | |
4419 | ||
4420 | return false; | |
4421 | } | |
4422 | ||
6faa1114 | 4423 | bool plymouth_running(void) { |
9408a2d2 | 4424 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4425 | } |
4426 | ||
9beb3f4d LP |
4427 | char* strshorten(char *s, size_t l) { |
4428 | assert(s); | |
4429 | ||
4430 | if (l < strlen(s)) | |
4431 | s[l] = 0; | |
4432 | ||
4433 | return s; | |
4434 | } | |
4435 | ||
4436 | static bool hostname_valid_char(char c) { | |
4437 | return | |
4438 | (c >= 'a' && c <= 'z') || | |
4439 | (c >= 'A' && c <= 'Z') || | |
4440 | (c >= '0' && c <= '9') || | |
4441 | c == '-' || | |
4442 | c == '_' || | |
4443 | c == '.'; | |
4444 | } | |
4445 | ||
4446 | bool hostname_is_valid(const char *s) { | |
4447 | const char *p; | |
4448 | ||
4449 | if (isempty(s)) | |
4450 | return false; | |
4451 | ||
4452 | for (p = s; *p; p++) | |
4453 | if (!hostname_valid_char(*p)) | |
4454 | return false; | |
4455 | ||
4456 | if (p-s > HOST_NAME_MAX) | |
4457 | return false; | |
4458 | ||
4459 | return true; | |
4460 | } | |
4461 | ||
4462 | char* hostname_cleanup(char *s) { | |
4463 | char *p, *d; | |
4464 | ||
4465 | for (p = s, d = s; *p; p++) | |
4466 | if ((*p >= 'a' && *p <= 'z') || | |
4467 | (*p >= 'A' && *p <= 'Z') || | |
4468 | (*p >= '0' && *p <= '9') || | |
4469 | *p == '-' || | |
4470 | *p == '_' || | |
4471 | *p == '.') | |
4472 | *(d++) = *p; | |
4473 | ||
4474 | *d = 0; | |
4475 | ||
4476 | strshorten(s, HOST_NAME_MAX); | |
4477 | return s; | |
4478 | } | |
4479 | ||
1325aa42 LP |
4480 | int pipe_eof(int fd) { |
4481 | struct pollfd pollfd; | |
4482 | int r; | |
4483 | ||
4484 | zero(pollfd); | |
4485 | pollfd.fd = fd; | |
4486 | pollfd.events = POLLIN|POLLHUP; | |
4487 | ||
4488 | r = poll(&pollfd, 1, 0); | |
4489 | if (r < 0) | |
4490 | return -errno; | |
4491 | ||
4492 | if (r == 0) | |
4493 | return 0; | |
4494 | ||
4495 | return pollfd.revents & POLLHUP; | |
4496 | } | |
4497 | ||
8f2d43a0 | 4498 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b LP |
4499 | struct pollfd pollfd; |
4500 | int r; | |
4501 | ||
4502 | zero(pollfd); | |
4503 | pollfd.fd = fd; | |
4504 | pollfd.events = event; | |
4505 | ||
8f2d43a0 | 4506 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
4507 | if (r < 0) |
4508 | return -errno; | |
4509 | ||
4510 | if (r == 0) | |
4511 | return 0; | |
4512 | ||
4513 | return pollfd.revents; | |
4514 | } | |
4515 | ||
5a3ab509 LP |
4516 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4517 | FILE *f; | |
4518 | char *t; | |
4519 | const char *fn; | |
4520 | size_t k; | |
4521 | int fd; | |
4522 | ||
4523 | assert(path); | |
4524 | assert(_f); | |
4525 | assert(_temp_path); | |
4526 | ||
4527 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4528 | if (!t) | |
4529 | return -ENOMEM; | |
4530 | ||
9eb977db | 4531 | fn = path_get_file_name(path); |
5a3ab509 LP |
4532 | k = fn-path; |
4533 | memcpy(t, path, k); | |
4534 | t[k] = '.'; | |
4535 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4536 | ||
4537 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4538 | if (fd < 0) { | |
4539 | free(t); | |
4540 | return -errno; | |
4541 | } | |
4542 | ||
4543 | f = fdopen(fd, "we"); | |
4544 | if (!f) { | |
4545 | unlink(t); | |
4546 | free(t); | |
4547 | return -errno; | |
4548 | } | |
4549 | ||
4550 | *_f = f; | |
4551 | *_temp_path = t; | |
4552 | ||
4553 | return 0; | |
4554 | } | |
4555 | ||
6ea832a2 | 4556 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4557 | assert(fd >= 0); |
4558 | ||
6ea832a2 LP |
4559 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4560 | return -errno; | |
4561 | ||
4562 | return 0; | |
4563 | } | |
4564 | ||
4565 | int terminal_vhangup(const char *name) { | |
4566 | int fd, r; | |
4567 | ||
4568 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4569 | if (fd < 0) | |
4570 | return fd; | |
4571 | ||
4572 | r = terminal_vhangup_fd(fd); | |
4573 | close_nointr_nofail(fd); | |
4574 | ||
4575 | return r; | |
4576 | } | |
4577 | ||
4578 | int vt_disallocate(const char *name) { | |
4579 | int fd, r; | |
4580 | unsigned u; | |
6ea832a2 LP |
4581 | |
4582 | /* Deallocate the VT if possible. If not possible | |
4583 | * (i.e. because it is the active one), at least clear it | |
4584 | * entirely (including the scrollback buffer) */ | |
4585 | ||
b83bc4e9 LP |
4586 | if (!startswith(name, "/dev/")) |
4587 | return -EINVAL; | |
4588 | ||
4589 | if (!tty_is_vc(name)) { | |
4590 | /* So this is not a VT. I guess we cannot deallocate | |
4591 | * it then. But let's at least clear the screen */ | |
4592 | ||
4593 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4594 | if (fd < 0) | |
4595 | return fd; | |
4596 | ||
8585357a LP |
4597 | loop_write(fd, |
4598 | "\033[r" /* clear scrolling region */ | |
4599 | "\033[H" /* move home */ | |
4600 | "\033[2J", /* clear screen */ | |
4601 | 10, false); | |
b83bc4e9 LP |
4602 | close_nointr_nofail(fd); |
4603 | ||
4604 | return 0; | |
4605 | } | |
6ea832a2 LP |
4606 | |
4607 | if (!startswith(name, "/dev/tty")) | |
4608 | return -EINVAL; | |
4609 | ||
4610 | r = safe_atou(name+8, &u); | |
4611 | if (r < 0) | |
4612 | return r; | |
4613 | ||
4614 | if (u <= 0) | |
b83bc4e9 | 4615 | return -EINVAL; |
6ea832a2 | 4616 | |
b83bc4e9 | 4617 | /* Try to deallocate */ |
6ea832a2 LP |
4618 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4619 | if (fd < 0) | |
4620 | return fd; | |
4621 | ||
4622 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4623 | close_nointr_nofail(fd); |
6ea832a2 | 4624 | |
b83bc4e9 LP |
4625 | if (r >= 0) |
4626 | return 0; | |
6ea832a2 | 4627 | |
b83bc4e9 | 4628 | if (errno != EBUSY) |
6ea832a2 | 4629 | return -errno; |
6ea832a2 | 4630 | |
b83bc4e9 LP |
4631 | /* Couldn't deallocate, so let's clear it fully with |
4632 | * scrollback */ | |
4633 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4634 | if (fd < 0) |
b83bc4e9 | 4635 | return fd; |
6ea832a2 | 4636 | |
8585357a LP |
4637 | loop_write(fd, |
4638 | "\033[r" /* clear scrolling region */ | |
4639 | "\033[H" /* move home */ | |
4640 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4641 | 10, false); | |
b83bc4e9 | 4642 | close_nointr_nofail(fd); |
6ea832a2 | 4643 | |
b83bc4e9 | 4644 | return 0; |
6ea832a2 LP |
4645 | } |
4646 | ||
34ca941c LP |
4647 | int copy_file(const char *from, const char *to) { |
4648 | int r, fdf, fdt; | |
4649 | ||
4650 | assert(from); | |
4651 | assert(to); | |
4652 | ||
4653 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4654 | if (fdf < 0) | |
4655 | return -errno; | |
4656 | ||
4657 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
4658 | if (fdt < 0) { | |
4659 | close_nointr_nofail(fdf); | |
4660 | return -errno; | |
4661 | } | |
4662 | ||
4663 | for (;;) { | |
4664 | char buf[PIPE_BUF]; | |
4665 | ssize_t n, k; | |
4666 | ||
4667 | n = read(fdf, buf, sizeof(buf)); | |
4668 | if (n < 0) { | |
4669 | r = -errno; | |
4670 | ||
4671 | close_nointr_nofail(fdf); | |
4672 | close_nointr(fdt); | |
4673 | unlink(to); | |
4674 | ||
4675 | return r; | |
4676 | } | |
4677 | ||
4678 | if (n == 0) | |
4679 | break; | |
4680 | ||
4681 | errno = 0; | |
4682 | k = loop_write(fdt, buf, n, false); | |
4683 | if (n != k) { | |
4684 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4685 | ||
4686 | close_nointr_nofail(fdf); | |
4687 | close_nointr(fdt); | |
4688 | ||
4689 | unlink(to); | |
4690 | return r; | |
4691 | } | |
4692 | } | |
4693 | ||
4694 | close_nointr_nofail(fdf); | |
4695 | r = close_nointr(fdt); | |
4696 | ||
4697 | if (r < 0) { | |
4698 | unlink(to); | |
4699 | return r; | |
4700 | } | |
4701 | ||
4702 | return 0; | |
4703 | } | |
4704 | ||
424a19f8 LP |
4705 | int symlink_atomic(const char *from, const char *to) { |
4706 | char *x; | |
4707 | _cleanup_free_ char *t; | |
34ca941c LP |
4708 | const char *fn; |
4709 | size_t k; | |
4710 | unsigned long long ull; | |
4711 | unsigned i; | |
4712 | int r; | |
4713 | ||
4714 | assert(from); | |
4715 | assert(to); | |
4716 | ||
4717 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4718 | if (!t) | |
4719 | return -ENOMEM; | |
4720 | ||
9eb977db | 4721 | fn = path_get_file_name(to); |
34ca941c LP |
4722 | k = fn-to; |
4723 | memcpy(t, to, k); | |
4724 | t[k] = '.'; | |
4725 | x = stpcpy(t+k+1, fn); | |
4726 | ||
4727 | ull = random_ull(); | |
4728 | for (i = 0; i < 16; i++) { | |
4729 | *(x++) = hexchar(ull & 0xF); | |
4730 | ull >>= 4; | |
4731 | } | |
4732 | ||
4733 | *x = 0; | |
4734 | ||
424a19f8 LP |
4735 | if (symlink(from, t) < 0) |
4736 | return -errno; | |
34ca941c LP |
4737 | |
4738 | if (rename(t, to) < 0) { | |
4739 | r = -errno; | |
4740 | unlink(t); | |
34ca941c LP |
4741 | return r; |
4742 | } | |
4743 | ||
424a19f8 | 4744 | return 0; |
34ca941c LP |
4745 | } |
4746 | ||
4d6d6518 LP |
4747 | bool display_is_local(const char *display) { |
4748 | assert(display); | |
4749 | ||
4750 | return | |
4751 | display[0] == ':' && | |
4752 | display[1] >= '0' && | |
4753 | display[1] <= '9'; | |
4754 | } | |
4755 | ||
4756 | int socket_from_display(const char *display, char **path) { | |
4757 | size_t k; | |
4758 | char *f, *c; | |
4759 | ||
4760 | assert(display); | |
4761 | assert(path); | |
4762 | ||
4763 | if (!display_is_local(display)) | |
4764 | return -EINVAL; | |
4765 | ||
4766 | k = strspn(display+1, "0123456789"); | |
4767 | ||
4768 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4769 | if (!f) | |
4770 | return -ENOMEM; | |
4771 | ||
4772 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4773 | memcpy(c, display+1, k); | |
4774 | c[k] = 0; | |
4775 | ||
4776 | *path = f; | |
4777 | ||
4778 | return 0; | |
4779 | } | |
4780 | ||
d05c5031 LP |
4781 | int get_user_creds( |
4782 | const char **username, | |
4783 | uid_t *uid, gid_t *gid, | |
4784 | const char **home, | |
4785 | const char **shell) { | |
4786 | ||
1cccf435 | 4787 | struct passwd *p; |
ddd88763 | 4788 | uid_t u; |
1cccf435 MV |
4789 | |
4790 | assert(username); | |
4791 | assert(*username); | |
1cccf435 MV |
4792 | |
4793 | /* We enforce some special rules for uid=0: in order to avoid | |
4794 | * NSS lookups for root we hardcode its data. */ | |
4795 | ||
4796 | if (streq(*username, "root") || streq(*username, "0")) { | |
4797 | *username = "root"; | |
4b67834e LP |
4798 | |
4799 | if (uid) | |
4800 | *uid = 0; | |
4801 | ||
4802 | if (gid) | |
4803 | *gid = 0; | |
4804 | ||
4805 | if (home) | |
4806 | *home = "/root"; | |
d05c5031 LP |
4807 | |
4808 | if (shell) | |
4809 | *shell = "/bin/sh"; | |
4810 | ||
1cccf435 MV |
4811 | return 0; |
4812 | } | |
4813 | ||
ddd88763 | 4814 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4815 | errno = 0; |
ddd88763 | 4816 | p = getpwuid(u); |
1cccf435 MV |
4817 | |
4818 | /* If there are multiple users with the same id, make | |
4819 | * sure to leave $USER to the configured value instead | |
4820 | * of the first occurrence in the database. However if | |
4821 | * the uid was configured by a numeric uid, then let's | |
4822 | * pick the real username from /etc/passwd. */ | |
4823 | if (p) | |
4824 | *username = p->pw_name; | |
4825 | } else { | |
4826 | errno = 0; | |
4827 | p = getpwnam(*username); | |
4828 | } | |
4829 | ||
4830 | if (!p) | |
4831 | return errno != 0 ? -errno : -ESRCH; | |
4832 | ||
4b67834e LP |
4833 | if (uid) |
4834 | *uid = p->pw_uid; | |
4835 | ||
4836 | if (gid) | |
4837 | *gid = p->pw_gid; | |
4838 | ||
4839 | if (home) | |
4840 | *home = p->pw_dir; | |
4841 | ||
d05c5031 LP |
4842 | if (shell) |
4843 | *shell = p->pw_shell; | |
4844 | ||
4b67834e LP |
4845 | return 0; |
4846 | } | |
4847 | ||
4848 | int get_group_creds(const char **groupname, gid_t *gid) { | |
4849 | struct group *g; | |
4850 | gid_t id; | |
4851 | ||
4852 | assert(groupname); | |
4853 | ||
4854 | /* We enforce some special rules for gid=0: in order to avoid | |
4855 | * NSS lookups for root we hardcode its data. */ | |
4856 | ||
4857 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4858 | *groupname = "root"; | |
4859 | ||
4860 | if (gid) | |
4861 | *gid = 0; | |
4862 | ||
4863 | return 0; | |
4864 | } | |
4865 | ||
4866 | if (parse_gid(*groupname, &id) >= 0) { | |
4867 | errno = 0; | |
4868 | g = getgrgid(id); | |
4869 | ||
4870 | if (g) | |
4871 | *groupname = g->gr_name; | |
4872 | } else { | |
4873 | errno = 0; | |
4874 | g = getgrnam(*groupname); | |
4875 | } | |
4876 | ||
4877 | if (!g) | |
4878 | return errno != 0 ? -errno : -ESRCH; | |
4879 | ||
4880 | if (gid) | |
4881 | *gid = g->gr_gid; | |
4882 | ||
1cccf435 MV |
4883 | return 0; |
4884 | } | |
4885 | ||
43673799 LP |
4886 | int in_group(const char *name) { |
4887 | gid_t gid, *gids; | |
4888 | int ngroups_max, r, i; | |
4889 | ||
4890 | r = get_group_creds(&name, &gid); | |
4891 | if (r < 0) | |
4892 | return r; | |
4893 | ||
4894 | if (getgid() == gid) | |
4895 | return 1; | |
4896 | ||
4897 | if (getegid() == gid) | |
4898 | return 1; | |
4899 | ||
4900 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4901 | assert(ngroups_max > 0); | |
4902 | ||
4903 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4904 | ||
4905 | r = getgroups(ngroups_max, gids); | |
4906 | if (r < 0) | |
4907 | return -errno; | |
4908 | ||
4909 | for (i = 0; i < r; i++) | |
4910 | if (gids[i] == gid) | |
4911 | return 1; | |
4912 | ||
4913 | return 0; | |
4914 | } | |
4915 | ||
8092a428 LP |
4916 | int glob_exists(const char *path) { |
4917 | glob_t g; | |
4918 | int r, k; | |
4919 | ||
4920 | assert(path); | |
4921 | ||
4922 | zero(g); | |
4923 | errno = 0; | |
4924 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4925 | ||
4926 | if (k == GLOB_NOMATCH) | |
4927 | r = 0; | |
4928 | else if (k == GLOB_NOSPACE) | |
4929 | r = -ENOMEM; | |
4930 | else if (k == 0) | |
4931 | r = !strv_isempty(g.gl_pathv); | |
4932 | else | |
4933 | r = errno ? -errno : -EIO; | |
4934 | ||
4935 | globfree(&g); | |
4936 | ||
4937 | return r; | |
4938 | } | |
4939 | ||
83096483 LP |
4940 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4941 | struct stat st; | |
4942 | ||
4943 | assert(d); | |
4944 | assert(de); | |
4945 | ||
4946 | if (de->d_type != DT_UNKNOWN) | |
4947 | return 0; | |
4948 | ||
4949 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4950 | return -errno; | |
4951 | ||
4952 | de->d_type = | |
4953 | S_ISREG(st.st_mode) ? DT_REG : | |
4954 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4955 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4956 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4957 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4958 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4959 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4960 | DT_UNKNOWN; | |
4961 | ||
4962 | return 0; | |
4963 | } | |
4964 | ||
4965 | int in_search_path(const char *path, char **search) { | |
4966 | char **i, *parent; | |
4967 | int r; | |
4968 | ||
9eb977db | 4969 | r = path_get_parent(path, &parent); |
83096483 LP |
4970 | if (r < 0) |
4971 | return r; | |
4972 | ||
4973 | r = 0; | |
4974 | ||
4975 | STRV_FOREACH(i, search) { | |
4976 | if (path_equal(parent, *i)) { | |
4977 | r = 1; | |
4978 | break; | |
4979 | } | |
4980 | } | |
4981 | ||
4982 | free(parent); | |
4983 | ||
4984 | return r; | |
4985 | } | |
4986 | ||
034a2a52 LP |
4987 | int get_files_in_directory(const char *path, char ***list) { |
4988 | DIR *d; | |
4989 | int r = 0; | |
4990 | unsigned n = 0; | |
4991 | char **l = NULL; | |
4992 | ||
4993 | assert(path); | |
d60ef526 LP |
4994 | |
4995 | /* Returns all files in a directory in *list, and the number | |
4996 | * of files as return value. If list is NULL returns only the | |
4997 | * number */ | |
034a2a52 LP |
4998 | |
4999 | d = opendir(path); | |
8ea913b2 LP |
5000 | if (!d) |
5001 | return -errno; | |
5002 | ||
034a2a52 | 5003 | for (;;) { |
7d5e9c0f LP |
5004 | struct dirent *de; |
5005 | union dirent_storage buf; | |
034a2a52 LP |
5006 | int k; |
5007 | ||
7d5e9c0f | 5008 | k = readdir_r(d, &buf.de, &de); |
034a2a52 LP |
5009 | if (k != 0) { |
5010 | r = -k; | |
5011 | goto finish; | |
5012 | } | |
5013 | ||
5014 | if (!de) | |
5015 | break; | |
5016 | ||
5017 | dirent_ensure_type(d, de); | |
5018 | ||
5019 | if (!dirent_is_file(de)) | |
5020 | continue; | |
5021 | ||
d60ef526 LP |
5022 | if (list) { |
5023 | if ((unsigned) r >= n) { | |
5024 | char **t; | |
034a2a52 | 5025 | |
d60ef526 LP |
5026 | n = MAX(16, 2*r); |
5027 | t = realloc(l, sizeof(char*) * n); | |
5028 | if (!t) { | |
5029 | r = -ENOMEM; | |
5030 | goto finish; | |
5031 | } | |
034a2a52 | 5032 | |
d60ef526 LP |
5033 | l = t; |
5034 | } | |
034a2a52 | 5035 | |
d60ef526 | 5036 | assert((unsigned) r < n); |
034a2a52 | 5037 | |
d60ef526 LP |
5038 | l[r] = strdup(de->d_name); |
5039 | if (!l[r]) { | |
5040 | r = -ENOMEM; | |
5041 | goto finish; | |
5042 | } | |
034a2a52 | 5043 | |
d60ef526 LP |
5044 | l[++r] = NULL; |
5045 | } else | |
5046 | r++; | |
034a2a52 LP |
5047 | } |
5048 | ||
5049 | finish: | |
5050 | if (d) | |
5051 | closedir(d); | |
5052 | ||
d60ef526 LP |
5053 | if (r >= 0) { |
5054 | if (list) | |
5055 | *list = l; | |
5056 | } else | |
034a2a52 LP |
5057 | strv_free(l); |
5058 | ||
5059 | return r; | |
5060 | } | |
5061 | ||
b7def684 | 5062 | char *strjoin(const char *x, ...) { |
911a4828 LP |
5063 | va_list ap; |
5064 | size_t l; | |
5065 | char *r, *p; | |
5066 | ||
5067 | va_start(ap, x); | |
5068 | ||
5069 | if (x) { | |
5070 | l = strlen(x); | |
5071 | ||
5072 | for (;;) { | |
5073 | const char *t; | |
040f18ea | 5074 | size_t n; |
911a4828 LP |
5075 | |
5076 | t = va_arg(ap, const char *); | |
5077 | if (!t) | |
5078 | break; | |
5079 | ||
040f18ea | 5080 | n = strlen(t); |
e98055de LN |
5081 | if (n > ((size_t) -1) - l) { |
5082 | va_end(ap); | |
040f18ea | 5083 | return NULL; |
e98055de | 5084 | } |
040f18ea LP |
5085 | |
5086 | l += n; | |
911a4828 LP |
5087 | } |
5088 | } else | |
5089 | l = 0; | |
5090 | ||
5091 | va_end(ap); | |
5092 | ||
5093 | r = new(char, l+1); | |
5094 | if (!r) | |
5095 | return NULL; | |
5096 | ||
5097 | if (x) { | |
5098 | p = stpcpy(r, x); | |
5099 | ||
5100 | va_start(ap, x); | |
5101 | ||
5102 | for (;;) { | |
5103 | const char *t; | |
5104 | ||
5105 | t = va_arg(ap, const char *); | |
5106 | if (!t) | |
5107 | break; | |
5108 | ||
5109 | p = stpcpy(p, t); | |
5110 | } | |
8ea913b2 LP |
5111 | |
5112 | va_end(ap); | |
911a4828 LP |
5113 | } else |
5114 | r[0] = 0; | |
5115 | ||
5116 | return r; | |
5117 | } | |
5118 | ||
b636465b LP |
5119 | bool is_main_thread(void) { |
5120 | static __thread int cached = 0; | |
5121 | ||
5122 | if (_unlikely_(cached == 0)) | |
5123 | cached = getpid() == gettid() ? 1 : -1; | |
5124 | ||
5125 | return cached > 0; | |
5126 | } | |
5127 | ||
94959f0f LP |
5128 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
5129 | char *p, *s; | |
5130 | int r; | |
5131 | unsigned n, m; | |
5132 | ||
5133 | assert(ret); | |
5134 | ||
5135 | /* If it has a queue this is good enough for us */ | |
5136 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
5137 | return -ENOMEM; | |
5138 | ||
5139 | r = access(p, F_OK); | |
5140 | free(p); | |
5141 | ||
5142 | if (r >= 0) { | |
5143 | *ret = d; | |
5144 | return 0; | |
5145 | } | |
5146 | ||
5147 | /* If it is a partition find the originating device */ | |
5148 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
5149 | return -ENOMEM; | |
5150 | ||
5151 | r = access(p, F_OK); | |
5152 | free(p); | |
5153 | ||
5154 | if (r < 0) | |
5155 | return -ENOENT; | |
5156 | ||
5157 | /* Get parent dev_t */ | |
5158 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
5159 | return -ENOMEM; | |
5160 | ||
5161 | r = read_one_line_file(p, &s); | |
5162 | free(p); | |
5163 | ||
5164 | if (r < 0) | |
5165 | return r; | |
5166 | ||
5167 | r = sscanf(s, "%u:%u", &m, &n); | |
5168 | free(s); | |
5169 | ||
5170 | if (r != 2) | |
5171 | return -EINVAL; | |
5172 | ||
5173 | /* Only return this if it is really good enough for us. */ | |
5174 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
5175 | return -ENOMEM; | |
5176 | ||
5177 | r = access(p, F_OK); | |
5178 | free(p); | |
5179 | ||
5180 | if (r >= 0) { | |
5181 | *ret = makedev(m, n); | |
5182 | return 0; | |
5183 | } | |
5184 | ||
5185 | return -ENOENT; | |
5186 | } | |
5187 | ||
8d53b453 | 5188 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
5189 | struct stat st; |
5190 | ||
5191 | assert(p); | |
5192 | ||
5193 | if (lstat(p, &st) < 0) | |
5194 | return -errno; | |
5195 | ||
5196 | return | |
8d53b453 | 5197 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
5198 | (st.st_mode & S_ISVTX); |
5199 | } | |
94959f0f | 5200 | |
f41607a6 LP |
5201 | static const char *const ioprio_class_table[] = { |
5202 | [IOPRIO_CLASS_NONE] = "none", | |
5203 | [IOPRIO_CLASS_RT] = "realtime", | |
5204 | [IOPRIO_CLASS_BE] = "best-effort", | |
5205 | [IOPRIO_CLASS_IDLE] = "idle" | |
5206 | }; | |
5207 | ||
5208 | DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int); | |
5209 | ||
5210 | static const char *const sigchld_code_table[] = { | |
5211 | [CLD_EXITED] = "exited", | |
5212 | [CLD_KILLED] = "killed", | |
5213 | [CLD_DUMPED] = "dumped", | |
5214 | [CLD_TRAPPED] = "trapped", | |
5215 | [CLD_STOPPED] = "stopped", | |
5216 | [CLD_CONTINUED] = "continued", | |
5217 | }; | |
5218 | ||
5219 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
5220 | ||
5221 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
5222 | [LOG_FAC(LOG_KERN)] = "kern", | |
5223 | [LOG_FAC(LOG_USER)] = "user", | |
5224 | [LOG_FAC(LOG_MAIL)] = "mail", | |
5225 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
5226 | [LOG_FAC(LOG_AUTH)] = "auth", | |
5227 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
5228 | [LOG_FAC(LOG_LPR)] = "lpr", | |
5229 | [LOG_FAC(LOG_NEWS)] = "news", | |
5230 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
5231 | [LOG_FAC(LOG_CRON)] = "cron", | |
5232 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
5233 | [LOG_FAC(LOG_FTP)] = "ftp", | |
5234 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
5235 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
5236 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
5237 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
5238 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
5239 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
5240 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
5241 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
5242 | }; | |
5243 | ||
5244 | DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int); | |
5245 | ||
5246 | static const char *const log_level_table[] = { | |
5247 | [LOG_EMERG] = "emerg", | |
5248 | [LOG_ALERT] = "alert", | |
5249 | [LOG_CRIT] = "crit", | |
5250 | [LOG_ERR] = "err", | |
5251 | [LOG_WARNING] = "warning", | |
5252 | [LOG_NOTICE] = "notice", | |
5253 | [LOG_INFO] = "info", | |
5254 | [LOG_DEBUG] = "debug" | |
5255 | }; | |
5256 | ||
5257 | DEFINE_STRING_TABLE_LOOKUP(log_level, int); | |
5258 | ||
5259 | static const char* const sched_policy_table[] = { | |
5260 | [SCHED_OTHER] = "other", | |
5261 | [SCHED_BATCH] = "batch", | |
5262 | [SCHED_IDLE] = "idle", | |
5263 | [SCHED_FIFO] = "fifo", | |
5264 | [SCHED_RR] = "rr" | |
5265 | }; | |
5266 | ||
5267 | DEFINE_STRING_TABLE_LOOKUP(sched_policy, int); | |
5268 | ||
5269 | static const char* const rlimit_table[] = { | |
5270 | [RLIMIT_CPU] = "LimitCPU", | |
5271 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
5272 | [RLIMIT_DATA] = "LimitDATA", | |
5273 | [RLIMIT_STACK] = "LimitSTACK", | |
5274 | [RLIMIT_CORE] = "LimitCORE", | |
5275 | [RLIMIT_RSS] = "LimitRSS", | |
5276 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
5277 | [RLIMIT_AS] = "LimitAS", | |
5278 | [RLIMIT_NPROC] = "LimitNPROC", | |
5279 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
5280 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
5281 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
5282 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
5283 | [RLIMIT_NICE] = "LimitNICE", | |
5284 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
5285 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
5286 | }; | |
5287 | ||
5288 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
5289 | ||
5290 | static const char* const ip_tos_table[] = { | |
5291 | [IPTOS_LOWDELAY] = "low-delay", | |
5292 | [IPTOS_THROUGHPUT] = "throughput", | |
5293 | [IPTOS_RELIABILITY] = "reliability", | |
5294 | [IPTOS_LOWCOST] = "low-cost", | |
5295 | }; | |
5296 | ||
5297 | DEFINE_STRING_TABLE_LOOKUP(ip_tos, int); | |
5298 | ||
4e240ab0 | 5299 | static const char *const __signal_table[] = { |
f41607a6 LP |
5300 | [SIGHUP] = "HUP", |
5301 | [SIGINT] = "INT", | |
5302 | [SIGQUIT] = "QUIT", | |
5303 | [SIGILL] = "ILL", | |
5304 | [SIGTRAP] = "TRAP", | |
5305 | [SIGABRT] = "ABRT", | |
5306 | [SIGBUS] = "BUS", | |
5307 | [SIGFPE] = "FPE", | |
5308 | [SIGKILL] = "KILL", | |
5309 | [SIGUSR1] = "USR1", | |
5310 | [SIGSEGV] = "SEGV", | |
5311 | [SIGUSR2] = "USR2", | |
5312 | [SIGPIPE] = "PIPE", | |
5313 | [SIGALRM] = "ALRM", | |
5314 | [SIGTERM] = "TERM", | |
5315 | #ifdef SIGSTKFLT | |
5316 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
5317 | #endif | |
5318 | [SIGCHLD] = "CHLD", | |
5319 | [SIGCONT] = "CONT", | |
5320 | [SIGSTOP] = "STOP", | |
5321 | [SIGTSTP] = "TSTP", | |
5322 | [SIGTTIN] = "TTIN", | |
5323 | [SIGTTOU] = "TTOU", | |
5324 | [SIGURG] = "URG", | |
5325 | [SIGXCPU] = "XCPU", | |
5326 | [SIGXFSZ] = "XFSZ", | |
5327 | [SIGVTALRM] = "VTALRM", | |
5328 | [SIGPROF] = "PROF", | |
5329 | [SIGWINCH] = "WINCH", | |
5330 | [SIGIO] = "IO", | |
5331 | [SIGPWR] = "PWR", | |
5332 | [SIGSYS] = "SYS" | |
5333 | }; | |
5334 | ||
4e240ab0 MS |
5335 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
5336 | ||
5337 | const char *signal_to_string(int signo) { | |
5338 | static __thread char buf[12]; | |
5339 | const char *name; | |
5340 | ||
5341 | name = __signal_to_string(signo); | |
5342 | if (name) | |
5343 | return name; | |
5344 | ||
5345 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
5346 | snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN); | |
5347 | else | |
5348 | snprintf(buf, sizeof(buf) - 1, "%d", signo); | |
5349 | char_array_0(buf); | |
5350 | return buf; | |
5351 | } | |
5352 | ||
5353 | int signal_from_string(const char *s) { | |
5354 | int signo; | |
5355 | int offset = 0; | |
5356 | unsigned u; | |
5357 | ||
040f18ea | 5358 | signo = __signal_from_string(s); |
4e240ab0 MS |
5359 | if (signo > 0) |
5360 | return signo; | |
5361 | ||
5362 | if (startswith(s, "RTMIN+")) { | |
5363 | s += 6; | |
5364 | offset = SIGRTMIN; | |
5365 | } | |
5366 | if (safe_atou(s, &u) >= 0) { | |
5367 | signo = (int) u + offset; | |
5368 | if (signo > 0 && signo < _NSIG) | |
5369 | return signo; | |
5370 | } | |
5371 | return -1; | |
5372 | } | |
65457142 FC |
5373 | |
5374 | bool kexec_loaded(void) { | |
5375 | bool loaded = false; | |
5376 | char *s; | |
5377 | ||
5378 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
5379 | if (s[0] == '1') | |
5380 | loaded = true; | |
5381 | free(s); | |
5382 | } | |
5383 | return loaded; | |
5384 | } | |
fb9de93d LP |
5385 | |
5386 | int strdup_or_null(const char *a, char **b) { | |
5387 | char *c; | |
5388 | ||
5389 | assert(b); | |
5390 | ||
5391 | if (!a) { | |
5392 | *b = NULL; | |
5393 | return 0; | |
5394 | } | |
5395 | ||
5396 | c = strdup(a); | |
5397 | if (!c) | |
5398 | return -ENOMEM; | |
5399 | ||
5400 | *b = c; | |
5401 | return 0; | |
5402 | } | |
64685e0c | 5403 | |
87d2c1ff LP |
5404 | int prot_from_flags(int flags) { |
5405 | ||
5406 | switch (flags & O_ACCMODE) { | |
5407 | ||
5408 | case O_RDONLY: | |
5409 | return PROT_READ; | |
5410 | ||
5411 | case O_WRONLY: | |
5412 | return PROT_WRITE; | |
5413 | ||
5414 | case O_RDWR: | |
5415 | return PROT_READ|PROT_WRITE; | |
5416 | ||
5417 | default: | |
5418 | return -EINVAL; | |
5419 | } | |
7c99e0c1 | 5420 | } |
689b9a22 | 5421 | |
babfc091 | 5422 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 5423 | unsigned i; |
babfc091 LP |
5424 | |
5425 | static const struct { | |
5426 | const char *suffix; | |
5427 | off_t factor; | |
5428 | } table[] = { | |
32895bb3 LP |
5429 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
5430 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
5431 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
5432 | { "G", 1024ULL*1024ULL*1024ULL }, | |
5433 | { "M", 1024ULL*1024ULL }, | |
5434 | { "K", 1024ULL }, | |
5435 | }; | |
5436 | ||
5437 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
5438 | ||
5439 | if (t >= table[i].factor) { | |
5440 | snprintf(buf, l, | |
5441 | "%llu.%llu%s", | |
5442 | (unsigned long long) (t / table[i].factor), | |
5443 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
5444 | table[i].suffix); | |
5445 | ||
5446 | goto finish; | |
5447 | } | |
5448 | } | |
5449 | ||
5450 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
5451 | ||
5452 | finish: | |
5453 | buf[l-1] = 0; | |
5454 | return buf; | |
5455 | ||
5456 | } | |
55d7bfc1 LP |
5457 | |
5458 | void* memdup(const void *p, size_t l) { | |
5459 | void *r; | |
5460 | ||
5461 | assert(p); | |
5462 | ||
5463 | r = malloc(l); | |
5464 | if (!r) | |
5465 | return NULL; | |
5466 | ||
5467 | memcpy(r, p, l); | |
5468 | return r; | |
5469 | } | |
bb99a35a LP |
5470 | |
5471 | int fd_inc_sndbuf(int fd, size_t n) { | |
5472 | int r, value; | |
5473 | socklen_t l = sizeof(value); | |
5474 | ||
5475 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
5476 | if (r >= 0 && | |
5477 | l == sizeof(value) && | |
5478 | (size_t) value >= n*2) | |
5479 | return 0; | |
5480 | ||
5481 | value = (int) n; | |
5482 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
5483 | if (r < 0) | |
5484 | return -errno; | |
5485 | ||
5486 | return 1; | |
5487 | } | |
5488 | ||
5489 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5490 | int r, value; | |
5491 | socklen_t l = sizeof(value); | |
5492 | ||
5493 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
5494 | if (r >= 0 && | |
5495 | l == sizeof(value) && | |
5496 | (size_t) value >= n*2) | |
5497 | return 0; | |
5498 | ||
5499 | value = (int) n; | |
5500 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
5501 | if (r < 0) | |
5502 | return -errno; | |
5503 | ||
5504 | return 1; | |
5505 | } | |
6bb92a16 | 5506 | |
9bdc770c | 5507 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
5508 | pid_t parent_pid, agent_pid; |
5509 | int fd; | |
5510 | bool stdout_is_tty, stderr_is_tty; | |
5511 | unsigned n, i; | |
5512 | va_list ap; | |
5513 | char **l; | |
5514 | ||
5515 | assert(pid); | |
5516 | assert(path); | |
5517 | ||
5518 | parent_pid = getpid(); | |
5519 | ||
5520 | /* Spawns a temporary TTY agent, making sure it goes away when | |
5521 | * we go away */ | |
5522 | ||
5523 | agent_pid = fork(); | |
5524 | if (agent_pid < 0) | |
5525 | return -errno; | |
5526 | ||
5527 | if (agent_pid != 0) { | |
5528 | *pid = agent_pid; | |
5529 | return 0; | |
5530 | } | |
5531 | ||
5532 | /* In the child: | |
5533 | * | |
5534 | * Make sure the agent goes away when the parent dies */ | |
5535 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5536 | _exit(EXIT_FAILURE); | |
5537 | ||
5538 | /* Check whether our parent died before we were able | |
5539 | * to set the death signal */ | |
5540 | if (getppid() != parent_pid) | |
5541 | _exit(EXIT_SUCCESS); | |
5542 | ||
5543 | /* Don't leak fds to the agent */ | |
9bdc770c | 5544 | close_all_fds(except, n_except); |
6bb92a16 LP |
5545 | |
5546 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5547 | stderr_is_tty = isatty(STDERR_FILENO); | |
5548 | ||
5549 | if (!stdout_is_tty || !stderr_is_tty) { | |
5550 | /* Detach from stdout/stderr. and reopen | |
5551 | * /dev/tty for them. This is important to | |
5552 | * ensure that when systemctl is started via | |
5553 | * popen() or a similar call that expects to | |
5554 | * read EOF we actually do generate EOF and | |
5555 | * not delay this indefinitely by because we | |
5556 | * keep an unused copy of stdin around. */ | |
5557 | fd = open("/dev/tty", O_WRONLY); | |
5558 | if (fd < 0) { | |
5559 | log_error("Failed to open /dev/tty: %m"); | |
5560 | _exit(EXIT_FAILURE); | |
5561 | } | |
5562 | ||
5563 | if (!stdout_is_tty) | |
5564 | dup2(fd, STDOUT_FILENO); | |
5565 | ||
5566 | if (!stderr_is_tty) | |
5567 | dup2(fd, STDERR_FILENO); | |
5568 | ||
5569 | if (fd > 2) | |
5570 | close(fd); | |
5571 | } | |
5572 | ||
5573 | /* Count arguments */ | |
5574 | va_start(ap, path); | |
5575 | for (n = 0; va_arg(ap, char*); n++) | |
5576 | ; | |
5577 | va_end(ap); | |
5578 | ||
5579 | /* Allocate strv */ | |
5580 | l = alloca(sizeof(char *) * (n + 1)); | |
5581 | ||
5582 | /* Fill in arguments */ | |
5583 | va_start(ap, path); | |
5584 | for (i = 0; i <= n; i++) | |
5585 | l[i] = va_arg(ap, char*); | |
5586 | va_end(ap); | |
5587 | ||
5588 | execv(path, l); | |
5589 | _exit(EXIT_FAILURE); | |
5590 | } | |
68faf98c LP |
5591 | |
5592 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5593 | struct rlimit highest, fixed; | |
5594 | ||
5595 | assert(rlim); | |
5596 | ||
5597 | if (setrlimit(resource, rlim) >= 0) | |
5598 | return 0; | |
5599 | ||
5600 | if (errno != EPERM) | |
5601 | return -errno; | |
5602 | ||
5603 | /* So we failed to set the desired setrlimit, then let's try | |
5604 | * to get as close as we can */ | |
5605 | assert_se(getrlimit(resource, &highest) == 0); | |
5606 | ||
5607 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5608 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5609 | ||
5610 | if (setrlimit(resource, &fixed) < 0) | |
5611 | return -errno; | |
5612 | ||
5613 | return 0; | |
5614 | } | |
3d9a4122 | 5615 | |
ab94af92 LP |
5616 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
5617 | char path[sizeof("/proc/")-1+10+sizeof("/environ")], *value = NULL; | |
5618 | int r; | |
5619 | FILE *f; | |
5620 | bool done = false; | |
5621 | size_t l; | |
5622 | ||
5623 | assert(field); | |
5624 | assert(_value); | |
5625 | ||
5626 | if (pid == 0) | |
5627 | pid = getpid(); | |
5628 | ||
5629 | snprintf(path, sizeof(path), "/proc/%lu/environ", (unsigned long) pid); | |
5630 | char_array_0(path); | |
5631 | ||
5632 | f = fopen(path, "re"); | |
5633 | if (!f) | |
5634 | return -errno; | |
5635 | ||
5636 | l = strlen(field); | |
5637 | r = 0; | |
5638 | ||
5639 | do { | |
5640 | char line[LINE_MAX]; | |
5641 | unsigned i; | |
5642 | ||
5643 | for (i = 0; i < sizeof(line)-1; i++) { | |
5644 | int c; | |
5645 | ||
5646 | c = getc(f); | |
5647 | if (_unlikely_(c == EOF)) { | |
5648 | done = true; | |
5649 | break; | |
5650 | } else if (c == 0) | |
5651 | break; | |
5652 | ||
5653 | line[i] = c; | |
5654 | } | |
5655 | line[i] = 0; | |
5656 | ||
5657 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5658 | value = strdup(line + l + 1); | |
5659 | if (!value) { | |
5660 | r = -ENOMEM; | |
5661 | break; | |
5662 | } | |
5663 | ||
5664 | r = 1; | |
5665 | break; | |
5666 | } | |
5667 | ||
5668 | } while (!done); | |
5669 | ||
5670 | fclose(f); | |
5671 | ||
5672 | if (r >= 0) | |
5673 | *_value = value; | |
5674 | ||
5675 | return r; | |
5676 | } | |
d889a206 LP |
5677 | |
5678 | int can_sleep(const char *type) { | |
e67f47e5 | 5679 | char *w, *state; |
d889a206 | 5680 | size_t l, k; |
d889a206 | 5681 | int r; |
e67f47e5 | 5682 | _cleanup_free_ char *p = NULL; |
d889a206 LP |
5683 | |
5684 | assert(type); | |
5685 | ||
5686 | r = read_one_line_file("/sys/power/state", &p); | |
5687 | if (r < 0) | |
5688 | return r == -ENOENT ? 0 : r; | |
5689 | ||
5690 | k = strlen(type); | |
e67f47e5 LP |
5691 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) |
5692 | if (l == k && memcmp(w, type, l) == 0) | |
5693 | return true; | |
d889a206 | 5694 | |
e67f47e5 | 5695 | return false; |
d889a206 | 5696 | } |
49dbfa7b LP |
5697 | |
5698 | bool is_valid_documentation_url(const char *url) { | |
5699 | assert(url); | |
5700 | ||
5701 | if (startswith(url, "http://") && url[7]) | |
5702 | return true; | |
5703 | ||
5704 | if (startswith(url, "https://") && url[8]) | |
5705 | return true; | |
5706 | ||
5707 | if (startswith(url, "file:") && url[5]) | |
5708 | return true; | |
5709 | ||
5710 | if (startswith(url, "info:") && url[5]) | |
5711 | return true; | |
5712 | ||
5713 | if (startswith(url, "man:") && url[4]) | |
5714 | return true; | |
5715 | ||
5716 | return false; | |
5717 | } | |
9be346c9 HH |
5718 | |
5719 | bool in_initrd(void) { | |
a05f97b3 | 5720 | static __thread int saved = -1; |
825c6fe5 | 5721 | struct statfs s; |
8f33b5b8 | 5722 | |
825c6fe5 LP |
5723 | if (saved >= 0) |
5724 | return saved; | |
5725 | ||
5726 | /* We make two checks here: | |
5727 | * | |
5728 | * 1. the flag file /etc/initrd-release must exist | |
5729 | * 2. the root file system must be a memory file system | |
5730 | * | |
5731 | * The second check is extra paranoia, since misdetecting an | |
5732 | * initrd can have bad bad consequences due the initrd | |
5733 | * emptying when transititioning to the main systemd. | |
5734 | */ | |
5735 | ||
5736 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5737 | statfs("/", &s) >= 0 && | |
5738 | (s.f_type == TMPFS_MAGIC || s.f_type == RAMFS_MAGIC); | |
9be346c9 | 5739 | |
8f33b5b8 | 5740 | return saved; |
9be346c9 | 5741 | } |
069cfc85 LP |
5742 | |
5743 | void warn_melody(void) { | |
e67f47e5 | 5744 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5745 | |
5746 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5747 | if (fd < 0) | |
5748 | return; | |
5749 | ||
040f18ea | 5750 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5751 | |
5752 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5753 | usleep(125*USEC_PER_MSEC); | |
5754 | ||
5755 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5756 | usleep(125*USEC_PER_MSEC); | |
5757 | ||
5758 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5759 | usleep(125*USEC_PER_MSEC); | |
5760 | ||
5761 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5762 | } |
cd3bd60a LP |
5763 | |
5764 | int make_console_stdio(void) { | |
5765 | int fd, r; | |
5766 | ||
5767 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5768 | ||
5769 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5770 | if (fd < 0) { | |
5771 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5772 | return fd; | |
5773 | } | |
5774 | ||
5775 | r = make_stdio(fd); | |
5776 | if (r < 0) { | |
5777 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5778 | return r; | |
5779 | } | |
5780 | ||
5781 | return 0; | |
5782 | } | |
7c5f152a LP |
5783 | |
5784 | int get_home_dir(char **_h) { | |
5785 | char *h; | |
5786 | const char *e; | |
5787 | uid_t u; | |
5788 | struct passwd *p; | |
5789 | ||
5790 | assert(_h); | |
5791 | ||
5792 | /* Take the user specified one */ | |
5793 | e = getenv("HOME"); | |
5794 | if (e) { | |
5795 | h = strdup(e); | |
5796 | if (!h) | |
5797 | return -ENOMEM; | |
5798 | ||
5799 | *_h = h; | |
5800 | return 0; | |
5801 | } | |
5802 | ||
5803 | /* Hardcode home directory for root to avoid NSS */ | |
5804 | u = getuid(); | |
5805 | if (u == 0) { | |
5806 | h = strdup("/root"); | |
5807 | if (!h) | |
5808 | return -ENOMEM; | |
5809 | ||
5810 | *_h = h; | |
5811 | return 0; | |
5812 | } | |
5813 | ||
5814 | /* Check the database... */ | |
5815 | errno = 0; | |
5816 | p = getpwuid(u); | |
5817 | if (!p) | |
e67f47e5 | 5818 | return errno ? -errno : -ESRCH; |
7c5f152a LP |
5819 | |
5820 | if (!path_is_absolute(p->pw_dir)) | |
5821 | return -EINVAL; | |
5822 | ||
5823 | h = strdup(p->pw_dir); | |
5824 | if (!h) | |
5825 | return -ENOMEM; | |
5826 | ||
5827 | *_h = h; | |
5828 | return 0; | |
5829 | } | |
5830 | ||
5831 | int get_shell(char **_sh) { | |
5832 | char *sh; | |
5833 | const char *e; | |
5834 | uid_t u; | |
5835 | struct passwd *p; | |
5836 | ||
5837 | assert(_sh); | |
5838 | ||
5839 | /* Take the user specified one */ | |
5840 | e = getenv("SHELL"); | |
5841 | if (e) { | |
5842 | sh = strdup(e); | |
5843 | if (!sh) | |
5844 | return -ENOMEM; | |
5845 | ||
5846 | *_sh = sh; | |
5847 | return 0; | |
5848 | } | |
5849 | ||
5850 | /* Hardcode home directory for root to avoid NSS */ | |
5851 | u = getuid(); | |
5852 | if (u == 0) { | |
5853 | sh = strdup("/bin/sh"); | |
5854 | if (!sh) | |
5855 | return -ENOMEM; | |
5856 | ||
5857 | *_sh = sh; | |
5858 | return 0; | |
5859 | } | |
5860 | ||
5861 | /* Check the database... */ | |
5862 | errno = 0; | |
5863 | p = getpwuid(u); | |
5864 | if (!p) | |
5865 | return errno ? -errno : -ESRCH; | |
5866 | ||
5867 | if (!path_is_absolute(p->pw_shell)) | |
5868 | return -EINVAL; | |
5869 | ||
5870 | sh = strdup(p->pw_shell); | |
5871 | if (!sh) | |
5872 | return -ENOMEM; | |
5873 | ||
5874 | *_sh = sh; | |
5875 | return 0; | |
5876 | } | |
2fbe635a LP |
5877 | |
5878 | void freep(void *p) { | |
5879 | free(*(void**) p); | |
5880 | } | |
5881 | ||
5882 | void fclosep(FILE **f) { | |
5883 | if (*f) | |
5884 | fclose(*f); | |
5885 | } | |
e67f47e5 LP |
5886 | |
5887 | void closep(int *fd) { | |
5888 | if (*fd >= 0) | |
5889 | close_nointr_nofail(*fd); | |
5890 | } | |
a05f97b3 LP |
5891 | |
5892 | void closedirp(DIR **d) { | |
5893 | if (*d) | |
5894 | closedir(*d); | |
5895 | } | |
25ea79fe ZJS |
5896 | |
5897 | void umaskp(mode_t *u) { | |
5898 | umask(*u); | |
5899 | } | |
0b507b17 LP |
5900 | |
5901 | bool filename_is_safe(const char *p) { | |
5902 | ||
5903 | if (isempty(p)) | |
5904 | return false; | |
5905 | ||
5906 | if (strchr(p, '/')) | |
5907 | return false; | |
5908 | ||
5909 | if (streq(p, ".")) | |
5910 | return false; | |
5911 | ||
5912 | if (streq(p, "..")) | |
5913 | return false; | |
5914 | ||
5915 | if (strlen(p) > FILENAME_MAX) | |
5916 | return false; | |
5917 | ||
5918 | return true; | |
5919 | } | |
5920 | ||
5921 | bool string_is_safe(const char *p) { | |
5922 | const char *t; | |
5923 | ||
5924 | assert(p); | |
5925 | ||
5926 | for (t = p; *t; t++) { | |
01539d6e | 5927 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5928 | return false; |
5929 | ||
011afa76 | 5930 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5931 | return false; |
5932 | } | |
5933 | ||
5934 | return true; | |
5935 | } | |
cfbc22ab LP |
5936 | |
5937 | int parse_timestamp(const char *t, usec_t *usec) { | |
5938 | const char *k; | |
5939 | struct tm tm, copy; | |
5940 | time_t x; | |
5941 | usec_t plus = 0, minus = 0, ret; | |
5942 | int r; | |
5943 | ||
5944 | /* | |
5945 | * Allowed syntaxes: | |
5946 | * | |
5947 | * 2012-09-22 16:34:22 | |
5948 | * 2012-09-22 16:34 (seconds will be set to 0) | |
5949 | * 2012-09-22 (time will be set to 00:00:00) | |
5950 | * 16:34:22 (date will be set to today) | |
5951 | * 16:34 (date will be set to today, seconds to 0) | |
5952 | * now | |
5953 | * yesterday (time is set to 00:00:00) | |
5954 | * today (time is set to 00:00:00) | |
5955 | * tomorrow (time is set to 00:00:00) | |
5956 | * +5min | |
5957 | * -5days | |
5958 | * | |
5959 | */ | |
5960 | ||
5961 | assert(t); | |
5962 | assert(usec); | |
5963 | ||
5964 | x = time(NULL); | |
5965 | assert_se(localtime_r(&x, &tm)); | |
5966 | ||
5967 | if (streq(t, "now")) | |
5968 | goto finish; | |
5969 | ||
5970 | else if (streq(t, "today")) { | |
5971 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
5972 | goto finish; | |
5973 | ||
5974 | } else if (streq(t, "yesterday")) { | |
5975 | tm.tm_mday --; | |
5976 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
5977 | goto finish; | |
5978 | ||
5979 | } else if (streq(t, "tomorrow")) { | |
5980 | tm.tm_mday ++; | |
5981 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
5982 | goto finish; | |
5983 | ||
5984 | } else if (t[0] == '+') { | |
5985 | ||
5986 | r = parse_usec(t+1, &plus); | |
5987 | if (r < 0) | |
5988 | return r; | |
5989 | ||
5990 | goto finish; | |
5991 | } else if (t[0] == '-') { | |
5992 | ||
5993 | r = parse_usec(t+1, &minus); | |
5994 | if (r < 0) | |
5995 | return r; | |
5996 | ||
5997 | goto finish; | |
5998 | } | |
5999 | ||
6000 | copy = tm; | |
6001 | k = strptime(t, "%y-%m-%d %H:%M:%S", &tm); | |
6002 | if (k && *k == 0) | |
6003 | goto finish; | |
6004 | ||
6005 | tm = copy; | |
6006 | k = strptime(t, "%Y-%m-%d %H:%M:%S", &tm); | |
6007 | if (k && *k == 0) | |
6008 | goto finish; | |
6009 | ||
6010 | tm = copy; | |
6011 | k = strptime(t, "%y-%m-%d %H:%M", &tm); | |
6012 | if (k && *k == 0) { | |
6013 | tm.tm_sec = 0; | |
6014 | goto finish; | |
6015 | } | |
6016 | ||
6017 | tm = copy; | |
6018 | k = strptime(t, "%Y-%m-%d %H:%M", &tm); | |
6019 | if (k && *k == 0) { | |
6020 | tm.tm_sec = 0; | |
6021 | goto finish; | |
6022 | } | |
6023 | ||
6024 | tm = copy; | |
6025 | k = strptime(t, "%y-%m-%d", &tm); | |
6026 | if (k && *k == 0) { | |
6027 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
6028 | goto finish; | |
6029 | } | |
6030 | ||
6031 | tm = copy; | |
6032 | k = strptime(t, "%Y-%m-%d", &tm); | |
6033 | if (k && *k == 0) { | |
6034 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
6035 | goto finish; | |
6036 | } | |
6037 | ||
6038 | tm = copy; | |
6039 | k = strptime(t, "%H:%M:%S", &tm); | |
6040 | if (k && *k == 0) | |
6041 | goto finish; | |
6042 | ||
6043 | tm = copy; | |
6044 | k = strptime(t, "%H:%M", &tm); | |
6045 | if (k && *k == 0) { | |
6046 | tm.tm_sec = 0; | |
6047 | goto finish; | |
6048 | } | |
6049 | ||
6050 | return -EINVAL; | |
6051 | ||
6052 | finish: | |
6053 | x = mktime(&tm); | |
6054 | if (x == (time_t) -1) | |
6055 | return -EINVAL; | |
6056 | ||
6057 | ret = (usec_t) x * USEC_PER_SEC; | |
6058 | ||
6059 | ret += plus; | |
6060 | if (ret > minus) | |
6061 | ret -= minus; | |
6062 | else | |
6063 | ret = 0; | |
6064 | ||
6065 | *usec = ret; | |
6066 | ||
6067 | return 0; | |
6068 | } |