]>
Commit | Line | Data |
---|---|---|
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> |
ac123445 | 53 | #include <sys/capability.h> |
7948c4df | 54 | #include <sys/time.h> |
8092a428 | 55 | #include <glob.h> |
4b67834e | 56 | #include <grp.h> |
87d2c1ff | 57 | #include <sys/mman.h> |
60918275 LP |
58 | |
59 | #include "macro.h" | |
60 | #include "util.h" | |
1dccbe19 LP |
61 | #include "ioprio.h" |
62 | #include "missing.h" | |
a9f5d454 | 63 | #include "log.h" |
65d2ebdc | 64 | #include "strv.h" |
e51bc1a2 | 65 | #include "label.h" |
9eb977db | 66 | #include "path-util.h" |
d06dacd0 | 67 | #include "exit-status.h" |
83cc030f | 68 | #include "hashmap.h" |
56cf987f | 69 | |
9a0e6896 LP |
70 | int saved_argc = 0; |
71 | char **saved_argv = NULL; | |
72 | ||
37f85e66 | 73 | size_t page_size(void) { |
74 | static __thread size_t pgsz = 0; | |
75 | long r; | |
76 | ||
87d2c1ff | 77 | if (_likely_(pgsz > 0)) |
37f85e66 | 78 | return pgsz; |
79 | ||
80 | assert_se((r = sysconf(_SC_PAGESIZE)) > 0); | |
81 | ||
82 | pgsz = (size_t) r; | |
83 | ||
84 | return pgsz; | |
85 | } | |
86 | ||
e05797fb LP |
87 | bool streq_ptr(const char *a, const char *b) { |
88 | ||
89 | /* Like streq(), but tries to make sense of NULL pointers */ | |
90 | ||
91 | if (a && b) | |
92 | return streq(a, b); | |
93 | ||
94 | if (!a && !b) | |
95 | return true; | |
96 | ||
97 | return false; | |
98 | } | |
99 | ||
47be870b | 100 | usec_t now(clockid_t clock_id) { |
60918275 LP |
101 | struct timespec ts; |
102 | ||
47be870b | 103 | assert_se(clock_gettime(clock_id, &ts) == 0); |
60918275 LP |
104 | |
105 | return timespec_load(&ts); | |
106 | } | |
107 | ||
63983207 | 108 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { |
871d7de4 LP |
109 | assert(ts); |
110 | ||
111 | ts->realtime = now(CLOCK_REALTIME); | |
112 | ts->monotonic = now(CLOCK_MONOTONIC); | |
113 | ||
114 | return ts; | |
115 | } | |
116 | ||
a185c5aa LP |
117 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) { |
118 | int64_t delta; | |
119 | assert(ts); | |
120 | ||
121 | ts->realtime = u; | |
122 | ||
123 | if (u == 0) | |
124 | ts->monotonic = 0; | |
125 | else { | |
126 | delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; | |
127 | ||
128 | ts->monotonic = now(CLOCK_MONOTONIC); | |
129 | ||
130 | if ((int64_t) ts->monotonic > delta) | |
131 | ts->monotonic -= delta; | |
132 | else | |
133 | ts->monotonic = 0; | |
134 | } | |
135 | ||
136 | return ts; | |
137 | } | |
138 | ||
60918275 LP |
139 | usec_t timespec_load(const struct timespec *ts) { |
140 | assert(ts); | |
141 | ||
142 | return | |
143 | (usec_t) ts->tv_sec * USEC_PER_SEC + | |
144 | (usec_t) ts->tv_nsec / NSEC_PER_USEC; | |
145 | } | |
146 | ||
147 | struct timespec *timespec_store(struct timespec *ts, usec_t u) { | |
148 | assert(ts); | |
149 | ||
150 | ts->tv_sec = (time_t) (u / USEC_PER_SEC); | |
151 | ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); | |
152 | ||
153 | return ts; | |
154 | } | |
155 | ||
156 | usec_t timeval_load(const struct timeval *tv) { | |
157 | assert(tv); | |
158 | ||
159 | return | |
160 | (usec_t) tv->tv_sec * USEC_PER_SEC + | |
161 | (usec_t) tv->tv_usec; | |
162 | } | |
163 | ||
164 | struct timeval *timeval_store(struct timeval *tv, usec_t u) { | |
165 | assert(tv); | |
166 | ||
167 | tv->tv_sec = (time_t) (u / USEC_PER_SEC); | |
168 | tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); | |
169 | ||
170 | return tv; | |
171 | } | |
172 | ||
173 | bool endswith(const char *s, const char *postfix) { | |
174 | size_t sl, pl; | |
175 | ||
176 | assert(s); | |
177 | assert(postfix); | |
178 | ||
179 | sl = strlen(s); | |
180 | pl = strlen(postfix); | |
181 | ||
d4d0d4db LP |
182 | if (pl == 0) |
183 | return true; | |
184 | ||
60918275 LP |
185 | if (sl < pl) |
186 | return false; | |
187 | ||
188 | return memcmp(s + sl - pl, postfix, pl) == 0; | |
189 | } | |
190 | ||
191 | bool startswith(const char *s, const char *prefix) { | |
192 | size_t sl, pl; | |
193 | ||
194 | assert(s); | |
195 | assert(prefix); | |
196 | ||
197 | sl = strlen(s); | |
198 | pl = strlen(prefix); | |
199 | ||
d4d0d4db LP |
200 | if (pl == 0) |
201 | return true; | |
202 | ||
60918275 LP |
203 | if (sl < pl) |
204 | return false; | |
205 | ||
206 | return memcmp(s, prefix, pl) == 0; | |
207 | } | |
208 | ||
3177a7fa MAP |
209 | bool startswith_no_case(const char *s, const char *prefix) { |
210 | size_t sl, pl; | |
211 | unsigned i; | |
212 | ||
213 | assert(s); | |
214 | assert(prefix); | |
215 | ||
216 | sl = strlen(s); | |
217 | pl = strlen(prefix); | |
218 | ||
219 | if (pl == 0) | |
220 | return true; | |
221 | ||
222 | if (sl < pl) | |
223 | return false; | |
224 | ||
225 | for(i = 0; i < pl; ++i) { | |
226 | if (tolower(s[i]) != tolower(prefix[i])) | |
227 | return false; | |
228 | } | |
229 | ||
230 | return true; | |
231 | } | |
232 | ||
79d6d816 LP |
233 | bool first_word(const char *s, const char *word) { |
234 | size_t sl, wl; | |
235 | ||
236 | assert(s); | |
237 | assert(word); | |
238 | ||
239 | sl = strlen(s); | |
240 | wl = strlen(word); | |
241 | ||
242 | if (sl < wl) | |
243 | return false; | |
244 | ||
d4d0d4db LP |
245 | if (wl == 0) |
246 | return true; | |
247 | ||
79d6d816 LP |
248 | if (memcmp(s, word, wl) != 0) |
249 | return false; | |
250 | ||
d4d0d4db LP |
251 | return s[wl] == 0 || |
252 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
253 | } |
254 | ||
42f4e3c4 | 255 | int close_nointr(int fd) { |
60918275 LP |
256 | assert(fd >= 0); |
257 | ||
258 | for (;;) { | |
259 | int r; | |
260 | ||
48f82119 LP |
261 | r = close(fd); |
262 | if (r >= 0) | |
60918275 LP |
263 | return r; |
264 | ||
265 | if (errno != EINTR) | |
48f82119 | 266 | return -errno; |
60918275 LP |
267 | } |
268 | } | |
85261803 | 269 | |
85f136b5 | 270 | void close_nointr_nofail(int fd) { |
80876c20 | 271 | int saved_errno = errno; |
85f136b5 LP |
272 | |
273 | /* like close_nointr() but cannot fail, and guarantees errno | |
274 | * is unchanged */ | |
275 | ||
276 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
277 | |
278 | errno = saved_errno; | |
85f136b5 LP |
279 | } |
280 | ||
5b6319dc LP |
281 | void close_many(const int fds[], unsigned n_fd) { |
282 | unsigned i; | |
283 | ||
284 | for (i = 0; i < n_fd; i++) | |
285 | close_nointr_nofail(fds[i]); | |
286 | } | |
287 | ||
85261803 LP |
288 | int parse_boolean(const char *v) { |
289 | assert(v); | |
290 | ||
44d8db9e | 291 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on")) |
85261803 | 292 | return 1; |
44d8db9e | 293 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off")) |
85261803 LP |
294 | return 0; |
295 | ||
296 | return -EINVAL; | |
297 | } | |
298 | ||
3ba686c1 | 299 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 300 | unsigned long ul = 0; |
3ba686c1 LP |
301 | pid_t pid; |
302 | int r; | |
303 | ||
304 | assert(s); | |
305 | assert(ret_pid); | |
306 | ||
307 | if ((r = safe_atolu(s, &ul)) < 0) | |
308 | return r; | |
309 | ||
310 | pid = (pid_t) ul; | |
311 | ||
312 | if ((unsigned long) pid != ul) | |
313 | return -ERANGE; | |
314 | ||
315 | if (pid <= 0) | |
316 | return -ERANGE; | |
317 | ||
318 | *ret_pid = pid; | |
319 | return 0; | |
320 | } | |
321 | ||
034a2a52 LP |
322 | int parse_uid(const char *s, uid_t* ret_uid) { |
323 | unsigned long ul = 0; | |
324 | uid_t uid; | |
325 | int r; | |
326 | ||
327 | assert(s); | |
328 | assert(ret_uid); | |
329 | ||
330 | if ((r = safe_atolu(s, &ul)) < 0) | |
331 | return r; | |
332 | ||
333 | uid = (uid_t) ul; | |
334 | ||
335 | if ((unsigned long) uid != ul) | |
336 | return -ERANGE; | |
337 | ||
338 | *ret_uid = uid; | |
339 | return 0; | |
340 | } | |
341 | ||
85261803 LP |
342 | int safe_atou(const char *s, unsigned *ret_u) { |
343 | char *x = NULL; | |
034c6ed7 | 344 | unsigned long l; |
85261803 LP |
345 | |
346 | assert(s); | |
347 | assert(ret_u); | |
348 | ||
349 | errno = 0; | |
350 | l = strtoul(s, &x, 0); | |
351 | ||
352 | if (!x || *x || errno) | |
353 | return errno ? -errno : -EINVAL; | |
354 | ||
034c6ed7 | 355 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
356 | return -ERANGE; |
357 | ||
358 | *ret_u = (unsigned) l; | |
359 | return 0; | |
360 | } | |
361 | ||
362 | int safe_atoi(const char *s, int *ret_i) { | |
363 | char *x = NULL; | |
034c6ed7 | 364 | long l; |
85261803 LP |
365 | |
366 | assert(s); | |
367 | assert(ret_i); | |
368 | ||
369 | errno = 0; | |
370 | l = strtol(s, &x, 0); | |
371 | ||
372 | if (!x || *x || errno) | |
373 | return errno ? -errno : -EINVAL; | |
374 | ||
034c6ed7 | 375 | if ((long) (int) l != l) |
85261803 LP |
376 | return -ERANGE; |
377 | ||
034c6ed7 LP |
378 | *ret_i = (int) l; |
379 | return 0; | |
380 | } | |
381 | ||
034c6ed7 LP |
382 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
383 | char *x = NULL; | |
384 | unsigned long long l; | |
385 | ||
386 | assert(s); | |
387 | assert(ret_llu); | |
388 | ||
389 | errno = 0; | |
390 | l = strtoull(s, &x, 0); | |
391 | ||
392 | if (!x || *x || errno) | |
393 | return errno ? -errno : -EINVAL; | |
394 | ||
395 | *ret_llu = l; | |
396 | return 0; | |
397 | } | |
398 | ||
399 | int safe_atolli(const char *s, long long int *ret_lli) { | |
400 | char *x = NULL; | |
401 | long long l; | |
402 | ||
403 | assert(s); | |
404 | assert(ret_lli); | |
405 | ||
406 | errno = 0; | |
407 | l = strtoll(s, &x, 0); | |
408 | ||
409 | if (!x || *x || errno) | |
410 | return errno ? -errno : -EINVAL; | |
411 | ||
412 | *ret_lli = l; | |
85261803 LP |
413 | return 0; |
414 | } | |
a41e8209 | 415 | |
a41e8209 | 416 | /* Split a string into words. */ |
65d2ebdc | 417 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
418 | char *current; |
419 | ||
420 | current = *state ? *state : (char*) c; | |
421 | ||
422 | if (!*current || *c == 0) | |
423 | return NULL; | |
424 | ||
65d2ebdc LP |
425 | current += strspn(current, separator); |
426 | *l = strcspn(current, separator); | |
82919e3d LP |
427 | *state = current+*l; |
428 | ||
429 | return (char*) current; | |
430 | } | |
431 | ||
034c6ed7 LP |
432 | /* Split a string into words, but consider strings enclosed in '' and |
433 | * "" as words even if they include spaces. */ | |
434 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
435 | char *current, *e; |
436 | bool escaped = false; | |
034c6ed7 LP |
437 | |
438 | current = *state ? *state : (char*) c; | |
439 | ||
440 | if (!*current || *c == 0) | |
441 | return NULL; | |
442 | ||
443 | current += strspn(current, WHITESPACE); | |
444 | ||
445 | if (*current == '\'') { | |
446 | current ++; | |
034c6ed7 | 447 | |
0bab36f2 LP |
448 | for (e = current; *e; e++) { |
449 | if (escaped) | |
450 | escaped = false; | |
451 | else if (*e == '\\') | |
452 | escaped = true; | |
453 | else if (*e == '\'') | |
454 | break; | |
455 | } | |
456 | ||
457 | *l = e-current; | |
458 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
459 | } else if (*current == '\"') { |
460 | current ++; | |
034c6ed7 | 461 | |
0bab36f2 LP |
462 | for (e = current; *e; e++) { |
463 | if (escaped) | |
464 | escaped = false; | |
465 | else if (*e == '\\') | |
466 | escaped = true; | |
467 | else if (*e == '\"') | |
468 | break; | |
469 | } | |
470 | ||
471 | *l = e-current; | |
472 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 473 | } else { |
0bab36f2 LP |
474 | for (e = current; *e; e++) { |
475 | if (escaped) | |
476 | escaped = false; | |
477 | else if (*e == '\\') | |
478 | escaped = true; | |
479 | else if (strchr(WHITESPACE, *e)) | |
480 | break; | |
481 | } | |
482 | *l = e-current; | |
483 | *state = e; | |
034c6ed7 LP |
484 | } |
485 | ||
486 | return (char*) current; | |
487 | } | |
488 | ||
034c6ed7 LP |
489 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
490 | int r; | |
491 | FILE *f; | |
20c03b7b | 492 | char fn[PATH_MAX], line[LINE_MAX], *p; |
bb00e604 | 493 | long unsigned ppid; |
034c6ed7 | 494 | |
8480e784 | 495 | assert(pid > 0); |
034c6ed7 LP |
496 | assert(_ppid); |
497 | ||
bb00e604 | 498 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
8480e784 | 499 | char_array_0(fn); |
034c6ed7 | 500 | |
ccaa6149 | 501 | if (!(f = fopen(fn, "re"))) |
034c6ed7 LP |
502 | return -errno; |
503 | ||
504 | if (!(fgets(line, sizeof(line), f))) { | |
35d50f55 | 505 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
506 | fclose(f); |
507 | return r; | |
508 | } | |
509 | ||
510 | fclose(f); | |
511 | ||
512 | /* Let's skip the pid and comm fields. The latter is enclosed | |
513 | * in () but does not escape any () in its value, so let's | |
514 | * skip over it manually */ | |
515 | ||
516 | if (!(p = strrchr(line, ')'))) | |
517 | return -EIO; | |
518 | ||
519 | p++; | |
520 | ||
521 | if (sscanf(p, " " | |
522 | "%*c " /* state */ | |
bb00e604 | 523 | "%lu ", /* ppid */ |
034c6ed7 LP |
524 | &ppid) != 1) |
525 | return -EIO; | |
526 | ||
bb00e604 | 527 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
528 | return -ERANGE; |
529 | ||
530 | *_ppid = (pid_t) ppid; | |
531 | ||
532 | return 0; | |
533 | } | |
534 | ||
7640a5de LP |
535 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
536 | int r; | |
537 | FILE *f; | |
538 | char fn[PATH_MAX], line[LINE_MAX], *p; | |
539 | ||
540 | assert(pid > 0); | |
541 | assert(st); | |
542 | ||
543 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); | |
544 | char_array_0(fn); | |
545 | ||
ccaa6149 | 546 | if (!(f = fopen(fn, "re"))) |
7640a5de LP |
547 | return -errno; |
548 | ||
549 | if (!(fgets(line, sizeof(line), f))) { | |
35d50f55 | 550 | r = feof(f) ? -EIO : -errno; |
7640a5de LP |
551 | fclose(f); |
552 | return r; | |
553 | } | |
554 | ||
555 | fclose(f); | |
556 | ||
557 | /* Let's skip the pid and comm fields. The latter is enclosed | |
558 | * in () but does not escape any () in its value, so let's | |
559 | * skip over it manually */ | |
560 | ||
561 | if (!(p = strrchr(line, ')'))) | |
562 | return -EIO; | |
563 | ||
564 | p++; | |
565 | ||
566 | if (sscanf(p, " " | |
567 | "%*c " /* state */ | |
568 | "%*d " /* ppid */ | |
569 | "%*d " /* pgrp */ | |
570 | "%*d " /* session */ | |
571 | "%*d " /* tty_nr */ | |
572 | "%*d " /* tpgid */ | |
573 | "%*u " /* flags */ | |
574 | "%*u " /* minflt */ | |
575 | "%*u " /* cminflt */ | |
576 | "%*u " /* majflt */ | |
577 | "%*u " /* cmajflt */ | |
578 | "%*u " /* utime */ | |
579 | "%*u " /* stime */ | |
580 | "%*d " /* cutime */ | |
581 | "%*d " /* cstime */ | |
582 | "%*d " /* priority */ | |
583 | "%*d " /* nice */ | |
584 | "%*d " /* num_threads */ | |
585 | "%*d " /* itrealvalue */ | |
586 | "%llu " /* starttime */, | |
587 | st) != 1) | |
588 | return -EIO; | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
034c6ed7 LP |
593 | int write_one_line_file(const char *fn, const char *line) { |
594 | FILE *f; | |
595 | int r; | |
596 | ||
597 | assert(fn); | |
598 | assert(line); | |
599 | ||
03ad1136 LP |
600 | f = fopen(fn, "we"); |
601 | if (!f) | |
034c6ed7 LP |
602 | return -errno; |
603 | ||
34ca941c | 604 | errno = 0; |
034c6ed7 LP |
605 | if (fputs(line, f) < 0) { |
606 | r = -errno; | |
607 | goto finish; | |
608 | } | |
609 | ||
8e1bd70d LP |
610 | if (!endswith(line, "\n")) |
611 | fputc('\n', f); | |
612 | ||
151b190e LP |
613 | fflush(f); |
614 | ||
615 | if (ferror(f)) { | |
616 | if (errno != 0) | |
617 | r = -errno; | |
618 | else | |
619 | r = -EIO; | |
620 | } else | |
621 | r = 0; | |
622 | ||
034c6ed7 LP |
623 | finish: |
624 | fclose(f); | |
625 | return r; | |
626 | } | |
627 | ||
34ca941c LP |
628 | int fchmod_umask(int fd, mode_t m) { |
629 | mode_t u; | |
630 | int r; | |
631 | ||
632 | u = umask(0777); | |
633 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
634 | umask(u); | |
635 | ||
636 | return r; | |
637 | } | |
638 | ||
639 | int write_one_line_file_atomic(const char *fn, const char *line) { | |
640 | FILE *f; | |
641 | int r; | |
642 | char *p; | |
643 | ||
644 | assert(fn); | |
645 | assert(line); | |
646 | ||
647 | r = fopen_temporary(fn, &f, &p); | |
648 | if (r < 0) | |
649 | return r; | |
650 | ||
651 | fchmod_umask(fileno(f), 0644); | |
652 | ||
653 | errno = 0; | |
654 | if (fputs(line, f) < 0) { | |
655 | r = -errno; | |
656 | goto finish; | |
657 | } | |
658 | ||
659 | if (!endswith(line, "\n")) | |
660 | fputc('\n', f); | |
661 | ||
662 | fflush(f); | |
663 | ||
664 | if (ferror(f)) { | |
665 | if (errno != 0) | |
666 | r = -errno; | |
667 | else | |
668 | r = -EIO; | |
669 | } else { | |
670 | if (rename(p, fn) < 0) | |
671 | r = -errno; | |
672 | else | |
673 | r = 0; | |
674 | } | |
675 | ||
676 | finish: | |
677 | if (r < 0) | |
678 | unlink(p); | |
679 | ||
680 | fclose(f); | |
681 | free(p); | |
682 | ||
683 | return r; | |
684 | } | |
685 | ||
034c6ed7 LP |
686 | int read_one_line_file(const char *fn, char **line) { |
687 | FILE *f; | |
688 | int r; | |
97c4a07d | 689 | char t[LINE_MAX], *c; |
034c6ed7 LP |
690 | |
691 | assert(fn); | |
692 | assert(line); | |
693 | ||
4099a281 LP |
694 | f = fopen(fn, "re"); |
695 | if (!f) | |
034c6ed7 LP |
696 | return -errno; |
697 | ||
4099a281 LP |
698 | if (!fgets(t, sizeof(t), f)) { |
699 | ||
700 | if (ferror(f)) { | |
701 | r = -errno; | |
702 | goto finish; | |
703 | } | |
704 | ||
705 | t[0] = 0; | |
034c6ed7 LP |
706 | } |
707 | ||
4099a281 LP |
708 | c = strdup(t); |
709 | if (!c) { | |
034c6ed7 LP |
710 | r = -ENOMEM; |
711 | goto finish; | |
712 | } | |
713 | ||
6f9a471a LP |
714 | truncate_nl(c); |
715 | ||
034c6ed7 LP |
716 | *line = c; |
717 | r = 0; | |
718 | ||
719 | finish: | |
720 | fclose(f); | |
721 | return r; | |
722 | } | |
44d8db9e | 723 | |
34ca941c | 724 | int read_full_file(const char *fn, char **contents, size_t *size) { |
97c4a07d LP |
725 | FILE *f; |
726 | int r; | |
727 | size_t n, l; | |
728 | char *buf = NULL; | |
729 | struct stat st; | |
730 | ||
731 | if (!(f = fopen(fn, "re"))) | |
732 | return -errno; | |
733 | ||
734 | if (fstat(fileno(f), &st) < 0) { | |
735 | r = -errno; | |
736 | goto finish; | |
737 | } | |
738 | ||
34ca941c LP |
739 | /* Safety check */ |
740 | if (st.st_size > 4*1024*1024) { | |
741 | r = -E2BIG; | |
742 | goto finish; | |
743 | } | |
744 | ||
97c4a07d LP |
745 | n = st.st_size > 0 ? st.st_size : LINE_MAX; |
746 | l = 0; | |
747 | ||
748 | for (;;) { | |
749 | char *t; | |
750 | size_t k; | |
751 | ||
752 | if (!(t = realloc(buf, n+1))) { | |
753 | r = -ENOMEM; | |
754 | goto finish; | |
755 | } | |
756 | ||
757 | buf = t; | |
758 | k = fread(buf + l, 1, n - l, f); | |
759 | ||
760 | if (k <= 0) { | |
761 | if (ferror(f)) { | |
762 | r = -errno; | |
763 | goto finish; | |
764 | } | |
765 | ||
766 | break; | |
767 | } | |
768 | ||
769 | l += k; | |
770 | n *= 2; | |
771 | ||
772 | /* Safety check */ | |
773 | if (n > 4*1024*1024) { | |
774 | r = -E2BIG; | |
775 | goto finish; | |
776 | } | |
777 | } | |
778 | ||
f8440af5 | 779 | buf[l] = 0; |
97c4a07d LP |
780 | *contents = buf; |
781 | buf = NULL; | |
782 | ||
34ca941c LP |
783 | if (size) |
784 | *size = l; | |
785 | ||
97c4a07d LP |
786 | r = 0; |
787 | ||
788 | finish: | |
789 | fclose(f); | |
790 | free(buf); | |
791 | ||
792 | return r; | |
793 | } | |
794 | ||
795 | int parse_env_file( | |
796 | const char *fname, | |
c899f8c6 | 797 | const char *separator, ...) { |
97c4a07d | 798 | |
ce8a6aa1 | 799 | int r = 0; |
44d91056 | 800 | char *contents = NULL, *p; |
97c4a07d LP |
801 | |
802 | assert(fname); | |
c899f8c6 | 803 | assert(separator); |
97c4a07d | 804 | |
34ca941c | 805 | if ((r = read_full_file(fname, &contents, NULL)) < 0) |
97c4a07d LP |
806 | return r; |
807 | ||
808 | p = contents; | |
809 | for (;;) { | |
810 | const char *key = NULL; | |
811 | ||
c899f8c6 | 812 | p += strspn(p, separator); |
97c4a07d LP |
813 | p += strspn(p, WHITESPACE); |
814 | ||
815 | if (!*p) | |
816 | break; | |
817 | ||
818 | if (!strchr(COMMENTS, *p)) { | |
819 | va_list ap; | |
820 | char **value; | |
821 | ||
c899f8c6 | 822 | va_start(ap, separator); |
97c4a07d LP |
823 | while ((key = va_arg(ap, char *))) { |
824 | size_t n; | |
825 | char *v; | |
826 | ||
827 | value = va_arg(ap, char **); | |
828 | ||
829 | n = strlen(key); | |
830 | if (strncmp(p, key, n) != 0 || | |
831 | p[n] != '=') | |
832 | continue; | |
833 | ||
834 | p += n + 1; | |
c899f8c6 | 835 | n = strcspn(p, separator); |
97c4a07d LP |
836 | |
837 | if (n >= 2 && | |
e7db37dd LP |
838 | strchr(QUOTES, p[0]) && |
839 | p[n-1] == p[0]) | |
97c4a07d LP |
840 | v = strndup(p+1, n-2); |
841 | else | |
842 | v = strndup(p, n); | |
843 | ||
844 | if (!v) { | |
845 | r = -ENOMEM; | |
846 | va_end(ap); | |
847 | goto fail; | |
848 | } | |
849 | ||
dd36de4d KS |
850 | if (v[0] == '\0') { |
851 | /* return empty value strings as NULL */ | |
852 | free(v); | |
853 | v = NULL; | |
854 | } | |
855 | ||
97c4a07d LP |
856 | free(*value); |
857 | *value = v; | |
858 | ||
859 | p += n; | |
ce8a6aa1 LP |
860 | |
861 | r ++; | |
97c4a07d LP |
862 | break; |
863 | } | |
864 | va_end(ap); | |
865 | } | |
866 | ||
867 | if (!key) | |
c899f8c6 | 868 | p += strcspn(p, separator); |
97c4a07d LP |
869 | } |
870 | ||
97c4a07d LP |
871 | fail: |
872 | free(contents); | |
873 | return r; | |
874 | } | |
875 | ||
8c7be95e LP |
876 | int load_env_file( |
877 | const char *fname, | |
878 | char ***rl) { | |
879 | ||
880 | FILE *f; | |
6a39419f | 881 | char **m = NULL; |
8c7be95e LP |
882 | int r; |
883 | ||
884 | assert(fname); | |
885 | assert(rl); | |
886 | ||
887 | if (!(f = fopen(fname, "re"))) | |
888 | return -errno; | |
889 | ||
890 | while (!feof(f)) { | |
891 | char l[LINE_MAX], *p, *u; | |
892 | char **t; | |
893 | ||
894 | if (!fgets(l, sizeof(l), f)) { | |
895 | if (feof(f)) | |
896 | break; | |
897 | ||
898 | r = -errno; | |
899 | goto finish; | |
900 | } | |
901 | ||
902 | p = strstrip(l); | |
903 | ||
904 | if (!*p) | |
905 | continue; | |
906 | ||
907 | if (strchr(COMMENTS, *p)) | |
908 | continue; | |
909 | ||
910 | if (!(u = normalize_env_assignment(p))) { | |
911 | log_error("Out of memory"); | |
912 | r = -ENOMEM; | |
913 | goto finish; | |
914 | } | |
915 | ||
916 | t = strv_append(m, u); | |
917 | free(u); | |
918 | ||
919 | if (!t) { | |
920 | log_error("Out of memory"); | |
921 | r = -ENOMEM; | |
922 | goto finish; | |
923 | } | |
924 | ||
925 | strv_free(m); | |
926 | m = t; | |
927 | } | |
928 | ||
929 | r = 0; | |
930 | ||
931 | *rl = m; | |
932 | m = NULL; | |
933 | ||
934 | finish: | |
935 | if (f) | |
936 | fclose(f); | |
937 | ||
938 | strv_free(m); | |
939 | ||
940 | return r; | |
941 | } | |
942 | ||
7640a5de | 943 | int write_env_file(const char *fname, char **l) { |
34ca941c | 944 | char **i, *p; |
7640a5de LP |
945 | FILE *f; |
946 | int r; | |
947 | ||
34ca941c LP |
948 | r = fopen_temporary(fname, &f, &p); |
949 | if (r < 0) | |
950 | return r; | |
7640a5de | 951 | |
34ca941c LP |
952 | fchmod_umask(fileno(f), 0644); |
953 | ||
954 | errno = 0; | |
7640a5de LP |
955 | STRV_FOREACH(i, l) { |
956 | fputs(*i, f); | |
957 | fputc('\n', f); | |
958 | } | |
959 | ||
960 | fflush(f); | |
961 | ||
34ca941c LP |
962 | if (ferror(f)) { |
963 | if (errno != 0) | |
964 | r = -errno; | |
965 | else | |
966 | r = -EIO; | |
967 | } else { | |
968 | if (rename(p, fname) < 0) | |
969 | r = -errno; | |
970 | else | |
971 | r = 0; | |
972 | } | |
973 | ||
974 | if (r < 0) | |
975 | unlink(p); | |
976 | ||
7640a5de | 977 | fclose(f); |
34ca941c | 978 | free(p); |
7640a5de LP |
979 | |
980 | return r; | |
981 | } | |
982 | ||
7072ced8 LP |
983 | char *truncate_nl(char *s) { |
984 | assert(s); | |
985 | ||
986 | s[strcspn(s, NEWLINE)] = 0; | |
987 | return s; | |
988 | } | |
989 | ||
87d2c1ff | 990 | int get_process_comm(pid_t pid, char **name) { |
7072ced8 LP |
991 | int r; |
992 | ||
7072ced8 LP |
993 | assert(name); |
994 | ||
87d2c1ff LP |
995 | if (pid == 0) |
996 | r = read_one_line_file("/proc/self/comm", name); | |
997 | else { | |
998 | char *p; | |
999 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) | |
1000 | return -ENOMEM; | |
7072ced8 | 1001 | |
87d2c1ff LP |
1002 | r = read_one_line_file(p, name); |
1003 | free(p); | |
1004 | } | |
7072ced8 | 1005 | |
87d2c1ff | 1006 | return r; |
7072ced8 LP |
1007 | } |
1008 | ||
87d2c1ff LP |
1009 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
1010 | char *r, *k; | |
c59760ee LP |
1011 | int c; |
1012 | bool space = false; | |
1013 | size_t left; | |
1014 | FILE *f; | |
1015 | ||
c59760ee LP |
1016 | assert(max_length > 0); |
1017 | assert(line); | |
1018 | ||
87d2c1ff LP |
1019 | if (pid == 0) |
1020 | f = fopen("/proc/self/cmdline", "re"); | |
1021 | else { | |
1022 | char *p; | |
1023 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1024 | return -ENOMEM; | |
c59760ee | 1025 | |
87d2c1ff LP |
1026 | f = fopen(p, "re"); |
1027 | free(p); | |
1028 | } | |
c59760ee LP |
1029 | |
1030 | if (!f) | |
1031 | return -errno; | |
1032 | ||
87d2c1ff LP |
1033 | r = new(char, max_length); |
1034 | if (!r) { | |
c59760ee LP |
1035 | fclose(f); |
1036 | return -ENOMEM; | |
1037 | } | |
1038 | ||
1039 | k = r; | |
1040 | left = max_length; | |
1041 | while ((c = getc(f)) != EOF) { | |
1042 | ||
1043 | if (isprint(c)) { | |
1044 | if (space) { | |
1045 | if (left <= 4) | |
1046 | break; | |
1047 | ||
1048 | *(k++) = ' '; | |
057fbb58 | 1049 | left--; |
c59760ee LP |
1050 | space = false; |
1051 | } | |
1052 | ||
1053 | if (left <= 4) | |
1054 | break; | |
1055 | ||
1056 | *(k++) = (char) c; | |
057fbb58 | 1057 | left--; |
c59760ee LP |
1058 | } else |
1059 | space = true; | |
1060 | } | |
1061 | ||
1062 | if (left <= 4) { | |
1063 | size_t n = MIN(left-1, 3U); | |
1064 | memcpy(k, "...", n); | |
1065 | k[n] = 0; | |
1066 | } else | |
1067 | *k = 0; | |
1068 | ||
1069 | fclose(f); | |
1070 | ||
35d2e7ec LP |
1071 | /* Kernel threads have no argv[] */ |
1072 | if (r[0] == 0) { | |
1073 | char *t; | |
1074 | int h; | |
1075 | ||
1076 | free(r); | |
1077 | ||
87d2c1ff LP |
1078 | if (!comm_fallback) |
1079 | return -ENOENT; | |
1080 | ||
1081 | h = get_process_comm(pid, &t); | |
1082 | if (h < 0) | |
35d2e7ec LP |
1083 | return h; |
1084 | ||
87d2c1ff | 1085 | r = join("[", t, "]", NULL); |
35d2e7ec LP |
1086 | free(t); |
1087 | ||
87d2c1ff | 1088 | if (!r) |
35d2e7ec LP |
1089 | return -ENOMEM; |
1090 | } | |
fa776d8e | 1091 | |
c59760ee LP |
1092 | *line = r; |
1093 | return 0; | |
1094 | } | |
1095 | ||
1e5678d0 LP |
1096 | int is_kernel_thread(pid_t pid) { |
1097 | char *p; | |
1098 | size_t count; | |
1099 | char c; | |
1100 | bool eof; | |
1101 | FILE *f; | |
1102 | ||
1103 | if (pid == 0) | |
1104 | return 0; | |
1105 | ||
1106 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1107 | return -ENOMEM; | |
1108 | ||
1109 | f = fopen(p, "re"); | |
1110 | free(p); | |
1111 | ||
1112 | if (!f) | |
1113 | return -errno; | |
1114 | ||
1115 | count = fread(&c, 1, 1, f); | |
1116 | eof = feof(f); | |
1117 | fclose(f); | |
1118 | ||
1119 | /* Kernel threads have an empty cmdline */ | |
1120 | ||
1121 | if (count <= 0) | |
1122 | return eof ? 1 : -errno; | |
1123 | ||
1124 | return 0; | |
1125 | } | |
1126 | ||
87d2c1ff LP |
1127 | int get_process_exe(pid_t pid, char **name) { |
1128 | int r; | |
1129 | ||
1130 | assert(name); | |
1131 | ||
1132 | if (pid == 0) | |
1133 | r = readlink_malloc("/proc/self/exe", name); | |
1134 | else { | |
1135 | char *p; | |
1136 | if (asprintf(&p, "/proc/%lu/exe", (unsigned long) pid) < 0) | |
1137 | return -ENOMEM; | |
1138 | ||
1139 | r = readlink_malloc(p, name); | |
1140 | free(p); | |
1141 | } | |
1142 | ||
1143 | return r; | |
1144 | } | |
1145 | ||
7e4ab3c5 LP |
1146 | int get_process_uid(pid_t pid, uid_t *uid) { |
1147 | char *p; | |
1148 | FILE *f; | |
1149 | int r; | |
1150 | ||
1151 | assert(uid); | |
1152 | ||
1153 | if (pid == 0) | |
1154 | return getuid(); | |
1155 | ||
1156 | if (asprintf(&p, "/proc/%lu/status", (unsigned long) pid) < 0) | |
1157 | return -ENOMEM; | |
1158 | ||
1159 | f = fopen(p, "re"); | |
1160 | free(p); | |
1161 | ||
1162 | if (!f) | |
1163 | return -errno; | |
1164 | ||
1165 | while (!feof(f)) { | |
1166 | char line[LINE_MAX], *l; | |
1167 | ||
1168 | if (!fgets(line, sizeof(line), f)) { | |
1169 | if (feof(f)) | |
1170 | break; | |
1171 | ||
1172 | r = -errno; | |
1173 | goto finish; | |
1174 | } | |
1175 | ||
1176 | l = strstrip(line); | |
1177 | ||
1178 | if (startswith(l, "Uid:")) { | |
1179 | l += 4; | |
1180 | l += strspn(l, WHITESPACE); | |
1181 | ||
1182 | l[strcspn(l, WHITESPACE)] = 0; | |
1183 | ||
1184 | r = parse_uid(l, uid); | |
1185 | goto finish; | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | r = -EIO; | |
1190 | ||
1191 | finish: | |
1192 | fclose(f); | |
1193 | ||
1194 | return r; | |
1195 | } | |
1196 | ||
fab56fc5 LP |
1197 | char *strnappend(const char *s, const char *suffix, size_t b) { |
1198 | size_t a; | |
44d8db9e LP |
1199 | char *r; |
1200 | ||
fab56fc5 LP |
1201 | if (!s && !suffix) |
1202 | return strdup(""); | |
1203 | ||
1204 | if (!s) | |
1205 | return strndup(suffix, b); | |
1206 | ||
1207 | if (!suffix) | |
1208 | return strdup(s); | |
1209 | ||
44d8db9e LP |
1210 | assert(s); |
1211 | assert(suffix); | |
1212 | ||
1213 | a = strlen(s); | |
44d8db9e LP |
1214 | |
1215 | if (!(r = new(char, a+b+1))) | |
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 | ||
6febfd0d | 1566 | char *cunescape_length(const char *s, size_t length) { |
4fe88d28 LP |
1567 | char *r, *t; |
1568 | const char *f; | |
1569 | ||
1570 | assert(s); | |
1571 | ||
1572 | /* Undoes C style string escaping */ | |
1573 | ||
7f110ff9 LP |
1574 | r = new(char, length+1); |
1575 | if (!r) | |
4fe88d28 LP |
1576 | return r; |
1577 | ||
6febfd0d | 1578 | for (f = s, t = r; f < s + length; f++) { |
4fe88d28 LP |
1579 | |
1580 | if (*f != '\\') { | |
1581 | *(t++) = *f; | |
1582 | continue; | |
1583 | } | |
1584 | ||
1585 | f++; | |
1586 | ||
1587 | switch (*f) { | |
1588 | ||
1589 | case 'a': | |
1590 | *(t++) = '\a'; | |
1591 | break; | |
1592 | case 'b': | |
1593 | *(t++) = '\b'; | |
1594 | break; | |
1595 | case 'f': | |
1596 | *(t++) = '\f'; | |
1597 | break; | |
1598 | case 'n': | |
1599 | *(t++) = '\n'; | |
1600 | break; | |
1601 | case 'r': | |
1602 | *(t++) = '\r'; | |
1603 | break; | |
1604 | case 't': | |
1605 | *(t++) = '\t'; | |
1606 | break; | |
1607 | case 'v': | |
1608 | *(t++) = '\v'; | |
1609 | break; | |
1610 | case '\\': | |
1611 | *(t++) = '\\'; | |
1612 | break; | |
1613 | case '"': | |
1614 | *(t++) = '"'; | |
1615 | break; | |
1616 | case '\'': | |
1617 | *(t++) = '\''; | |
1618 | break; | |
1619 | ||
e167fb86 LP |
1620 | case 's': |
1621 | /* This is an extension of the XDG syntax files */ | |
1622 | *(t++) = ' '; | |
1623 | break; | |
1624 | ||
4fe88d28 LP |
1625 | case 'x': { |
1626 | /* hexadecimal encoding */ | |
1627 | int a, b; | |
1628 | ||
7f110ff9 LP |
1629 | a = unhexchar(f[1]); |
1630 | b = unhexchar(f[2]); | |
1631 | ||
1632 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1633 | /* Invalid escape code, let's take it literal then */ |
1634 | *(t++) = '\\'; | |
1635 | *(t++) = 'x'; | |
1636 | } else { | |
1637 | *(t++) = (char) ((a << 4) | b); | |
1638 | f += 2; | |
1639 | } | |
1640 | ||
1641 | break; | |
1642 | } | |
1643 | ||
1644 | case '0': | |
1645 | case '1': | |
1646 | case '2': | |
1647 | case '3': | |
1648 | case '4': | |
1649 | case '5': | |
1650 | case '6': | |
1651 | case '7': { | |
1652 | /* octal encoding */ | |
1653 | int a, b, c; | |
1654 | ||
7f110ff9 LP |
1655 | a = unoctchar(f[0]); |
1656 | b = unoctchar(f[1]); | |
1657 | c = unoctchar(f[2]); | |
1658 | ||
1659 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1660 | /* Invalid escape code, let's take it literal then */ |
1661 | *(t++) = '\\'; | |
1662 | *(t++) = f[0]; | |
1663 | } else { | |
1664 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1665 | f += 2; | |
1666 | } | |
1667 | ||
1668 | break; | |
1669 | } | |
1670 | ||
1671 | case 0: | |
1672 | /* premature end of string.*/ | |
1673 | *(t++) = '\\'; | |
1674 | goto finish; | |
1675 | ||
1676 | default: | |
1677 | /* Invalid escape code, let's take it literal then */ | |
1678 | *(t++) = '\\'; | |
f3d4cc01 | 1679 | *(t++) = *f; |
4fe88d28 LP |
1680 | break; |
1681 | } | |
1682 | } | |
1683 | ||
1684 | finish: | |
1685 | *t = 0; | |
1686 | return r; | |
1687 | } | |
1688 | ||
6febfd0d LP |
1689 | char *cunescape(const char *s) { |
1690 | return cunescape_length(s, strlen(s)); | |
1691 | } | |
4fe88d28 LP |
1692 | |
1693 | char *xescape(const char *s, const char *bad) { | |
1694 | char *r, *t; | |
1695 | const char *f; | |
1696 | ||
1697 | /* Escapes all chars in bad, in addition to \ and all special | |
1698 | * chars, in \xFF style escaping. May be reversed with | |
1699 | * cunescape. */ | |
1700 | ||
1701 | if (!(r = new(char, strlen(s)*4+1))) | |
1702 | return NULL; | |
1703 | ||
1704 | for (f = s, t = r; *f; f++) { | |
1705 | ||
b866264a LP |
1706 | if ((*f < ' ') || (*f >= 127) || |
1707 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1708 | *(t++) = '\\'; |
1709 | *(t++) = 'x'; | |
1710 | *(t++) = hexchar(*f >> 4); | |
1711 | *(t++) = hexchar(*f); | |
1712 | } else | |
1713 | *(t++) = *f; | |
1714 | } | |
1715 | ||
1716 | *t = 0; | |
1717 | ||
1718 | return r; | |
1719 | } | |
1720 | ||
ea430986 | 1721 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1722 | char *r, *t; |
1723 | const char *f; | |
1724 | ||
47be870b LP |
1725 | assert(s); |
1726 | ||
ea430986 LP |
1727 | /* Escapes all chars that D-Bus' object path cannot deal |
1728 | * with. Can be reverse with bus_path_unescape() */ | |
1729 | ||
1730 | if (!(r = new(char, strlen(s)*3+1))) | |
1731 | return NULL; | |
1732 | ||
1733 | for (f = s, t = r; *f; f++) { | |
1734 | ||
1735 | if (!(*f >= 'A' && *f <= 'Z') && | |
1736 | !(*f >= 'a' && *f <= 'z') && | |
1737 | !(*f >= '0' && *f <= '9')) { | |
1738 | *(t++) = '_'; | |
1739 | *(t++) = hexchar(*f >> 4); | |
1740 | *(t++) = hexchar(*f); | |
1741 | } else | |
1742 | *(t++) = *f; | |
1743 | } | |
1744 | ||
1745 | *t = 0; | |
1746 | ||
1747 | return r; | |
1748 | } | |
1749 | ||
9e2f7c11 | 1750 | char *bus_path_unescape(const char *f) { |
ea430986 | 1751 | char *r, *t; |
ea430986 | 1752 | |
9e2f7c11 | 1753 | assert(f); |
47be870b | 1754 | |
9e2f7c11 | 1755 | if (!(r = strdup(f))) |
ea430986 LP |
1756 | return NULL; |
1757 | ||
9e2f7c11 | 1758 | for (t = r; *f; f++) { |
ea430986 LP |
1759 | |
1760 | if (*f == '_') { | |
1761 | int a, b; | |
1762 | ||
1763 | if ((a = unhexchar(f[1])) < 0 || | |
1764 | (b = unhexchar(f[2])) < 0) { | |
1765 | /* Invalid escape code, let's take it literal then */ | |
1766 | *(t++) = '_'; | |
1767 | } else { | |
1768 | *(t++) = (char) ((a << 4) | b); | |
1769 | f += 2; | |
1770 | } | |
1771 | } else | |
1772 | *(t++) = *f; | |
1773 | } | |
1774 | ||
1775 | *t = 0; | |
1776 | ||
1777 | return r; | |
1778 | } | |
1779 | ||
67d51650 | 1780 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1781 | char *p; |
1782 | ||
67d51650 | 1783 | assert(t); |
4fe88d28 | 1784 | |
67d51650 | 1785 | for (p = t; *p; p++) |
4fe88d28 LP |
1786 | if (*p >= 'A' && *p <= 'Z') |
1787 | *p = *p - 'A' + 'a'; | |
1788 | ||
67d51650 | 1789 | return t; |
4fe88d28 | 1790 | } |
1dccbe19 | 1791 | |
c85dc17b LP |
1792 | bool ignore_file(const char *filename) { |
1793 | assert(filename); | |
1794 | ||
1795 | return | |
1796 | filename[0] == '.' || | |
6c78be3c | 1797 | streq(filename, "lost+found") || |
e472d476 LP |
1798 | streq(filename, "aquota.user") || |
1799 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1800 | endswith(filename, "~") || |
1801 | endswith(filename, ".rpmnew") || | |
1802 | endswith(filename, ".rpmsave") || | |
1803 | endswith(filename, ".rpmorig") || | |
1804 | endswith(filename, ".dpkg-old") || | |
1805 | endswith(filename, ".dpkg-new") || | |
1806 | endswith(filename, ".swp"); | |
1807 | } | |
1808 | ||
3a0ecb08 LP |
1809 | int fd_nonblock(int fd, bool nonblock) { |
1810 | int flags; | |
1811 | ||
1812 | assert(fd >= 0); | |
1813 | ||
1814 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1815 | return -errno; | |
1816 | ||
1817 | if (nonblock) | |
1818 | flags |= O_NONBLOCK; | |
1819 | else | |
1820 | flags &= ~O_NONBLOCK; | |
1821 | ||
1822 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1823 | return -errno; | |
1824 | ||
1825 | return 0; | |
1826 | } | |
1827 | ||
1828 | int fd_cloexec(int fd, bool cloexec) { | |
1829 | int flags; | |
1830 | ||
1831 | assert(fd >= 0); | |
1832 | ||
1833 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1834 | return -errno; | |
1835 | ||
1836 | if (cloexec) | |
1837 | flags |= FD_CLOEXEC; | |
1838 | else | |
1839 | flags &= ~FD_CLOEXEC; | |
1840 | ||
1841 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1842 | return -errno; | |
1843 | ||
1844 | return 0; | |
1845 | } | |
1846 | ||
b19be9eb LP |
1847 | static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
1848 | unsigned i; | |
1849 | ||
1850 | assert(n_fdset == 0 || fdset); | |
1851 | ||
1852 | for (i = 0; i < n_fdset; i++) | |
1853 | if (fdset[i] == fd) | |
1854 | return true; | |
1855 | ||
1856 | return false; | |
1857 | } | |
1858 | ||
a0d40ac5 LP |
1859 | int close_all_fds(const int except[], unsigned n_except) { |
1860 | DIR *d; | |
1861 | struct dirent *de; | |
1862 | int r = 0; | |
1863 | ||
b19be9eb LP |
1864 | assert(n_except == 0 || except); |
1865 | ||
1866 | d = opendir("/proc/self/fd"); | |
1867 | if (!d) { | |
1868 | int fd; | |
1869 | struct rlimit rl; | |
1870 | ||
1871 | /* When /proc isn't available (for example in chroots) | |
1872 | * the fallback is brute forcing through the fd | |
1873 | * table */ | |
1874 | ||
1875 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1876 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1877 | ||
1878 | if (fd_in_set(fd, except, n_except)) | |
1879 | continue; | |
1880 | ||
1881 | if (close_nointr(fd) < 0) | |
1882 | if (errno != EBADF && r == 0) | |
1883 | r = -errno; | |
1884 | } | |
1885 | ||
1886 | return r; | |
1887 | } | |
a0d40ac5 LP |
1888 | |
1889 | while ((de = readdir(d))) { | |
a7610064 | 1890 | int fd = -1; |
a0d40ac5 | 1891 | |
a16e1123 | 1892 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1893 | continue; |
1894 | ||
720ce21d LP |
1895 | if (safe_atoi(de->d_name, &fd) < 0) |
1896 | /* Let's better ignore this, just in case */ | |
1897 | continue; | |
a0d40ac5 LP |
1898 | |
1899 | if (fd < 3) | |
1900 | continue; | |
1901 | ||
1902 | if (fd == dirfd(d)) | |
1903 | continue; | |
1904 | ||
b19be9eb LP |
1905 | if (fd_in_set(fd, except, n_except)) |
1906 | continue; | |
a0d40ac5 | 1907 | |
720ce21d | 1908 | if (close_nointr(fd) < 0) { |
2f357920 | 1909 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1910 | if (errno != EBADF && r == 0) |
1911 | r = -errno; | |
2f357920 | 1912 | } |
a0d40ac5 LP |
1913 | } |
1914 | ||
a0d40ac5 LP |
1915 | closedir(d); |
1916 | return r; | |
1917 | } | |
1918 | ||
db12775d LP |
1919 | bool chars_intersect(const char *a, const char *b) { |
1920 | const char *p; | |
1921 | ||
1922 | /* Returns true if any of the chars in a are in b. */ | |
1923 | for (p = a; *p; p++) | |
1924 | if (strchr(b, *p)) | |
1925 | return true; | |
1926 | ||
1927 | return false; | |
1928 | } | |
1929 | ||
8b6c7120 LP |
1930 | char *format_timestamp(char *buf, size_t l, usec_t t) { |
1931 | struct tm tm; | |
1932 | time_t sec; | |
1933 | ||
1934 | assert(buf); | |
1935 | assert(l > 0); | |
1936 | ||
1937 | if (t <= 0) | |
1938 | return NULL; | |
1939 | ||
f872ec33 | 1940 | sec = (time_t) (t / USEC_PER_SEC); |
8b6c7120 LP |
1941 | |
1942 | if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0) | |
1943 | return NULL; | |
1944 | ||
1945 | return buf; | |
1946 | } | |
1947 | ||
584be568 LP |
1948 | char *format_timestamp_pretty(char *buf, size_t l, usec_t t) { |
1949 | usec_t n, d; | |
1950 | ||
1951 | n = now(CLOCK_REALTIME); | |
1952 | ||
1953 | if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) | |
1954 | return NULL; | |
1955 | ||
1956 | d = n - t; | |
1957 | ||
1958 | if (d >= USEC_PER_YEAR) | |
1959 | snprintf(buf, l, "%llu years and %llu months ago", | |
1960 | (unsigned long long) (d / USEC_PER_YEAR), | |
1961 | (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); | |
1962 | else if (d >= USEC_PER_MONTH) | |
1963 | snprintf(buf, l, "%llu months and %llu days ago", | |
1964 | (unsigned long long) (d / USEC_PER_MONTH), | |
1965 | (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); | |
1966 | else if (d >= USEC_PER_WEEK) | |
1967 | snprintf(buf, l, "%llu weeks and %llu days ago", | |
1968 | (unsigned long long) (d / USEC_PER_WEEK), | |
1969 | (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); | |
1970 | else if (d >= 2*USEC_PER_DAY) | |
1971 | snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); | |
1972 | else if (d >= 25*USEC_PER_HOUR) | |
1973 | snprintf(buf, l, "1 day and %lluh ago", | |
1974 | (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); | |
1975 | else if (d >= 6*USEC_PER_HOUR) | |
1976 | snprintf(buf, l, "%lluh ago", | |
1977 | (unsigned long long) (d / USEC_PER_HOUR)); | |
1978 | else if (d >= USEC_PER_HOUR) | |
1979 | snprintf(buf, l, "%lluh %llumin ago", | |
1980 | (unsigned long long) (d / USEC_PER_HOUR), | |
1981 | (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); | |
1982 | else if (d >= 5*USEC_PER_MINUTE) | |
1983 | snprintf(buf, l, "%llumin ago", | |
1984 | (unsigned long long) (d / USEC_PER_MINUTE)); | |
1985 | else if (d >= USEC_PER_MINUTE) | |
1986 | snprintf(buf, l, "%llumin %llus ago", | |
1987 | (unsigned long long) (d / USEC_PER_MINUTE), | |
1988 | (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); | |
1989 | else if (d >= USEC_PER_SEC) | |
1990 | snprintf(buf, l, "%llus ago", | |
1991 | (unsigned long long) (d / USEC_PER_SEC)); | |
1992 | else if (d >= USEC_PER_MSEC) | |
1993 | snprintf(buf, l, "%llums ago", | |
1994 | (unsigned long long) (d / USEC_PER_MSEC)); | |
1995 | else if (d > 0) | |
1996 | snprintf(buf, l, "%lluus ago", | |
1997 | (unsigned long long) d); | |
1998 | else | |
1999 | snprintf(buf, l, "now"); | |
2000 | ||
2001 | buf[l-1] = 0; | |
2002 | return buf; | |
2003 | } | |
2004 | ||
871d7de4 LP |
2005 | char *format_timespan(char *buf, size_t l, usec_t t) { |
2006 | static const struct { | |
2007 | const char *suffix; | |
2008 | usec_t usec; | |
2009 | } table[] = { | |
2010 | { "w", USEC_PER_WEEK }, | |
2011 | { "d", USEC_PER_DAY }, | |
2012 | { "h", USEC_PER_HOUR }, | |
2013 | { "min", USEC_PER_MINUTE }, | |
2014 | { "s", USEC_PER_SEC }, | |
2015 | { "ms", USEC_PER_MSEC }, | |
2016 | { "us", 1 }, | |
2017 | }; | |
2018 | ||
2019 | unsigned i; | |
2020 | char *p = buf; | |
2021 | ||
2022 | assert(buf); | |
2023 | assert(l > 0); | |
2024 | ||
2025 | if (t == (usec_t) -1) | |
2026 | return NULL; | |
2027 | ||
4502d22c LP |
2028 | if (t == 0) { |
2029 | snprintf(p, l, "0"); | |
2030 | p[l-1] = 0; | |
2031 | return p; | |
2032 | } | |
2033 | ||
871d7de4 LP |
2034 | /* The result of this function can be parsed with parse_usec */ |
2035 | ||
2036 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
2037 | int k; | |
2038 | size_t n; | |
2039 | ||
2040 | if (t < table[i].usec) | |
2041 | continue; | |
2042 | ||
2043 | if (l <= 1) | |
2044 | break; | |
2045 | ||
2046 | k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix); | |
2047 | n = MIN((size_t) k, l); | |
2048 | ||
2049 | l -= n; | |
2050 | p += n; | |
2051 | ||
2052 | t %= table[i].usec; | |
2053 | } | |
2054 | ||
2055 | *p = 0; | |
2056 | ||
2057 | return buf; | |
2058 | } | |
2059 | ||
42856c10 LP |
2060 | bool fstype_is_network(const char *fstype) { |
2061 | static const char * const table[] = { | |
2062 | "cifs", | |
2063 | "smbfs", | |
2064 | "ncpfs", | |
2065 | "nfs", | |
ca139f94 LP |
2066 | "nfs4", |
2067 | "gfs", | |
2068 | "gfs2" | |
42856c10 LP |
2069 | }; |
2070 | ||
2071 | unsigned i; | |
2072 | ||
2073 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2074 | if (streq(table[i], fstype)) | |
2075 | return true; | |
2076 | ||
2077 | return false; | |
2078 | } | |
2079 | ||
601f6a1e LP |
2080 | int chvt(int vt) { |
2081 | int fd, r = 0; | |
2082 | ||
74bc3bdc | 2083 | if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) |
601f6a1e LP |
2084 | return -errno; |
2085 | ||
2086 | if (vt < 0) { | |
2087 | int tiocl[2] = { | |
2088 | TIOCL_GETKMSGREDIRECT, | |
2089 | 0 | |
2090 | }; | |
2091 | ||
678abaf9 TJ |
2092 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) { |
2093 | r = -errno; | |
2094 | goto fail; | |
2095 | } | |
601f6a1e LP |
2096 | |
2097 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
2098 | } | |
2099 | ||
2100 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
2101 | r = -errno; | |
2102 | ||
678abaf9 TJ |
2103 | fail: |
2104 | close_nointr_nofail(fd); | |
601f6a1e LP |
2105 | return r; |
2106 | } | |
2107 | ||
8f2d43a0 | 2108 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
2109 | struct termios old_termios, new_termios; |
2110 | char c; | |
20c03b7b | 2111 | char line[LINE_MAX]; |
80876c20 LP |
2112 | |
2113 | assert(f); | |
2114 | assert(ret); | |
2115 | ||
2116 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
2117 | new_termios = old_termios; | |
2118 | ||
2119 | new_termios.c_lflag &= ~ICANON; | |
2120 | new_termios.c_cc[VMIN] = 1; | |
2121 | new_termios.c_cc[VTIME] = 0; | |
2122 | ||
2123 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
2124 | size_t k; | |
2125 | ||
8f2d43a0 LP |
2126 | if (t != (usec_t) -1) { |
2127 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
2128 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2129 | return -ETIMEDOUT; | |
2130 | } | |
2131 | } | |
2132 | ||
80876c20 LP |
2133 | k = fread(&c, 1, 1, f); |
2134 | ||
2135 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2136 | ||
2137 | if (k <= 0) | |
2138 | return -EIO; | |
2139 | ||
2140 | if (need_nl) | |
2141 | *need_nl = c != '\n'; | |
2142 | ||
2143 | *ret = c; | |
2144 | return 0; | |
2145 | } | |
2146 | } | |
2147 | ||
8f2d43a0 LP |
2148 | if (t != (usec_t) -1) |
2149 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
2150 | return -ETIMEDOUT; | |
2151 | ||
2152 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
2153 | return -EIO; |
2154 | ||
2155 | truncate_nl(line); | |
2156 | ||
2157 | if (strlen(line) != 1) | |
2158 | return -EBADMSG; | |
2159 | ||
2160 | if (need_nl) | |
2161 | *need_nl = false; | |
2162 | ||
2163 | *ret = line[0]; | |
2164 | return 0; | |
2165 | } | |
2166 | ||
2167 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 LP |
2168 | bool on_tty; |
2169 | ||
80876c20 LP |
2170 | assert(ret); |
2171 | assert(replies); | |
2172 | assert(text); | |
2173 | ||
1b39d4b9 LP |
2174 | on_tty = isatty(STDOUT_FILENO); |
2175 | ||
80876c20 LP |
2176 | for (;;) { |
2177 | va_list ap; | |
2178 | char c; | |
2179 | int r; | |
2180 | bool need_nl = true; | |
2181 | ||
1b39d4b9 | 2182 | if (on_tty) |
c1072ea0 | 2183 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 2184 | |
80876c20 LP |
2185 | va_start(ap, text); |
2186 | vprintf(text, ap); | |
2187 | va_end(ap); | |
2188 | ||
1b39d4b9 | 2189 | if (on_tty) |
c1072ea0 | 2190 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 2191 | |
80876c20 LP |
2192 | fflush(stdout); |
2193 | ||
8f2d43a0 LP |
2194 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
2195 | if (r < 0) { | |
80876c20 LP |
2196 | |
2197 | if (r == -EBADMSG) { | |
2198 | puts("Bad input, please try again."); | |
2199 | continue; | |
2200 | } | |
2201 | ||
2202 | putchar('\n'); | |
2203 | return r; | |
2204 | } | |
2205 | ||
2206 | if (need_nl) | |
2207 | putchar('\n'); | |
2208 | ||
2209 | if (strchr(replies, c)) { | |
2210 | *ret = c; | |
2211 | return 0; | |
2212 | } | |
2213 | ||
2214 | puts("Read unexpected character, please try again."); | |
2215 | } | |
2216 | } | |
2217 | ||
512947d4 | 2218 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
2219 | struct termios termios; |
2220 | int r = 0; | |
3fe5e5d4 LP |
2221 | |
2222 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
2223 | |
2224 | assert(fd >= 0); | |
2225 | ||
eed1d0e3 LP |
2226 | /* We leave locked terminal attributes untouched, so that |
2227 | * Plymouth may set whatever it wants to set, and we don't | |
2228 | * interfere with that. */ | |
3fe5e5d4 LP |
2229 | |
2230 | /* Disable exclusive mode, just in case */ | |
2231 | ioctl(fd, TIOCNXCL); | |
2232 | ||
5c0100a5 | 2233 | /* Switch to text mode */ |
512947d4 MS |
2234 | if (switch_to_text) |
2235 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 2236 | |
3fe5e5d4 | 2237 | /* Enable console unicode mode */ |
df465b3f | 2238 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
2239 | |
2240 | if (tcgetattr(fd, &termios) < 0) { | |
2241 | r = -errno; | |
2242 | goto finish; | |
2243 | } | |
2244 | ||
aaf694ca LP |
2245 | /* We only reset the stuff that matters to the software. How |
2246 | * hardware is set up we don't touch assuming that somebody | |
2247 | * else will do that for us */ | |
2248 | ||
2249 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
2250 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
2251 | termios.c_oflag |= ONLCR; | |
2252 | termios.c_cflag |= CREAD; | |
2253 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
2254 | ||
2255 | termios.c_cc[VINTR] = 03; /* ^C */ | |
2256 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
2257 | termios.c_cc[VERASE] = 0177; | |
2258 | termios.c_cc[VKILL] = 025; /* ^X */ | |
2259 | termios.c_cc[VEOF] = 04; /* ^D */ | |
2260 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
2261 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
2262 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
2263 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
2264 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
2265 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
2266 | termios.c_cc[VEOL] = 0; |
2267 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
2268 | |
2269 | termios.c_cc[VTIME] = 0; | |
2270 | termios.c_cc[VMIN] = 1; | |
2271 | ||
2272 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
2273 | r = -errno; | |
2274 | ||
2275 | finish: | |
2276 | /* Just in case, flush all crap out */ | |
2277 | tcflush(fd, TCIOFLUSH); | |
2278 | ||
2279 | return r; | |
2280 | } | |
2281 | ||
6ea832a2 LP |
2282 | int reset_terminal(const char *name) { |
2283 | int fd, r; | |
2284 | ||
2285 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
2286 | if (fd < 0) | |
2287 | return fd; | |
2288 | ||
512947d4 | 2289 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
2290 | close_nointr_nofail(fd); |
2291 | ||
2292 | return r; | |
2293 | } | |
2294 | ||
80876c20 LP |
2295 | int open_terminal(const char *name, int mode) { |
2296 | int fd, r; | |
f73f76ac | 2297 | unsigned c = 0; |
80876c20 | 2298 | |
f73f76ac LP |
2299 | /* |
2300 | * If a TTY is in the process of being closed opening it might | |
2301 | * cause EIO. This is horribly awful, but unlikely to be | |
2302 | * changed in the kernel. Hence we work around this problem by | |
2303 | * retrying a couple of times. | |
2304 | * | |
2305 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
2306 | */ | |
2307 | ||
2308 | for (;;) { | |
2309 | if ((fd = open(name, mode)) >= 0) | |
2310 | break; | |
2311 | ||
2312 | if (errno != EIO) | |
2313 | return -errno; | |
2314 | ||
2315 | if (c >= 20) | |
2316 | return -errno; | |
2317 | ||
2318 | usleep(50 * USEC_PER_MSEC); | |
2319 | c++; | |
2320 | } | |
2321 | ||
2322 | if (fd < 0) | |
80876c20 LP |
2323 | return -errno; |
2324 | ||
2325 | if ((r = isatty(fd)) < 0) { | |
2326 | close_nointr_nofail(fd); | |
2327 | return -errno; | |
2328 | } | |
2329 | ||
2330 | if (!r) { | |
2331 | close_nointr_nofail(fd); | |
2332 | return -ENOTTY; | |
2333 | } | |
2334 | ||
2335 | return fd; | |
2336 | } | |
2337 | ||
2338 | int flush_fd(int fd) { | |
2339 | struct pollfd pollfd; | |
2340 | ||
2341 | zero(pollfd); | |
2342 | pollfd.fd = fd; | |
2343 | pollfd.events = POLLIN; | |
2344 | ||
2345 | for (;;) { | |
20c03b7b | 2346 | char buf[LINE_MAX]; |
80876c20 LP |
2347 | ssize_t l; |
2348 | int r; | |
2349 | ||
2350 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2351 | ||
2352 | if (errno == EINTR) | |
2353 | continue; | |
2354 | ||
2355 | return -errno; | |
2356 | } | |
2357 | ||
2358 | if (r == 0) | |
2359 | return 0; | |
2360 | ||
2361 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2362 | ||
2363 | if (errno == EINTR) | |
2364 | continue; | |
2365 | ||
2366 | if (errno == EAGAIN) | |
2367 | return 0; | |
2368 | ||
2369 | return -errno; | |
2370 | } | |
2371 | ||
2372 | if (l <= 0) | |
2373 | return 0; | |
2374 | } | |
2375 | } | |
2376 | ||
21de3988 | 2377 | int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm) { |
bab45044 | 2378 | int fd = -1, notify = -1, r, wd = -1; |
80876c20 LP |
2379 | |
2380 | assert(name); | |
2381 | ||
2382 | /* We use inotify to be notified when the tty is closed. We | |
2383 | * create the watch before checking if we can actually acquire | |
2384 | * it, so that we don't lose any event. | |
2385 | * | |
2386 | * Note: strictly speaking this actually watches for the | |
2387 | * device being closed, it does *not* really watch whether a | |
2388 | * tty loses its controlling process. However, unless some | |
2389 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2390 | * its tty otherwise this will not become a problem. As long | |
2391 | * as the administrator makes sure not configure any service | |
2392 | * on the same tty as an untrusted user this should not be a | |
2393 | * problem. (Which he probably should not do anyway.) */ | |
2394 | ||
2395 | if (!fail && !force) { | |
2396 | if ((notify = inotify_init1(IN_CLOEXEC)) < 0) { | |
2397 | r = -errno; | |
2398 | goto fail; | |
2399 | } | |
2400 | ||
2401 | if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) { | |
2402 | r = -errno; | |
2403 | goto fail; | |
2404 | } | |
2405 | } | |
2406 | ||
2407 | for (;;) { | |
e3d1855b LP |
2408 | if (notify >= 0) |
2409 | if ((r = flush_fd(notify)) < 0) | |
2410 | goto fail; | |
80876c20 LP |
2411 | |
2412 | /* We pass here O_NOCTTY only so that we can check the return | |
2413 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2414 | * successfully became the controlling process of the tty */ | |
6ea832a2 LP |
2415 | if ((fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) |
2416 | return fd; | |
80876c20 LP |
2417 | |
2418 | /* First, try to get the tty */ | |
21de3988 LP |
2419 | r = ioctl(fd, TIOCSCTTY, force); |
2420 | ||
2421 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2422 | * returning EPERM, i.e. when very likely we already | |
2423 | * are have this controlling terminal. */ | |
2424 | if (r < 0 && errno == EPERM && ignore_tiocstty_eperm) | |
2425 | r = 0; | |
2426 | ||
2427 | if (r < 0 && (force || fail || errno != EPERM)) { | |
80876c20 LP |
2428 | r = -errno; |
2429 | goto fail; | |
2430 | } | |
2431 | ||
2432 | if (r >= 0) | |
2433 | break; | |
2434 | ||
2435 | assert(!fail); | |
2436 | assert(!force); | |
2437 | assert(notify >= 0); | |
2438 | ||
2439 | for (;;) { | |
f601daa7 | 2440 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 2441 | ssize_t l; |
f601daa7 | 2442 | struct inotify_event *e; |
80876c20 | 2443 | |
50f20cfd | 2444 | if ((l = read(notify, inotify_buffer, sizeof(inotify_buffer))) < 0) { |
80876c20 | 2445 | |
f601daa7 LP |
2446 | if (errno == EINTR) |
2447 | continue; | |
2448 | ||
2449 | r = -errno; | |
2450 | goto fail; | |
2451 | } | |
2452 | ||
2453 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2454 | |
f601daa7 LP |
2455 | while (l > 0) { |
2456 | size_t step; | |
80876c20 | 2457 | |
f601daa7 | 2458 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2459 | r = -EIO; |
f601daa7 LP |
2460 | goto fail; |
2461 | } | |
80876c20 | 2462 | |
f601daa7 LP |
2463 | step = sizeof(struct inotify_event) + e->len; |
2464 | assert(step <= (size_t) l); | |
80876c20 | 2465 | |
f601daa7 LP |
2466 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2467 | l -= step; | |
80876c20 LP |
2468 | } |
2469 | ||
2470 | break; | |
2471 | } | |
2472 | ||
2473 | /* We close the tty fd here since if the old session | |
2474 | * ended our handle will be dead. It's important that | |
2475 | * we do this after sleeping, so that we don't enter | |
2476 | * an endless loop. */ | |
2477 | close_nointr_nofail(fd); | |
2478 | } | |
2479 | ||
2480 | if (notify >= 0) | |
a16e1123 | 2481 | close_nointr_nofail(notify); |
80876c20 | 2482 | |
512947d4 MS |
2483 | r = reset_terminal_fd(fd, true); |
2484 | if (r < 0) | |
80876c20 LP |
2485 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2486 | ||
2487 | return fd; | |
2488 | ||
2489 | fail: | |
2490 | if (fd >= 0) | |
a16e1123 | 2491 | close_nointr_nofail(fd); |
80876c20 LP |
2492 | |
2493 | if (notify >= 0) | |
a16e1123 | 2494 | close_nointr_nofail(notify); |
80876c20 LP |
2495 | |
2496 | return r; | |
2497 | } | |
2498 | ||
2499 | int release_terminal(void) { | |
2500 | int r = 0, fd; | |
57cd2192 | 2501 | struct sigaction sa_old, sa_new; |
80876c20 | 2502 | |
ccaa6149 | 2503 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0) |
80876c20 LP |
2504 | return -errno; |
2505 | ||
57cd2192 LP |
2506 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2507 | * by our own TIOCNOTTY */ | |
2508 | ||
2509 | zero(sa_new); | |
2510 | sa_new.sa_handler = SIG_IGN; | |
2511 | sa_new.sa_flags = SA_RESTART; | |
2512 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2513 | ||
80876c20 LP |
2514 | if (ioctl(fd, TIOCNOTTY) < 0) |
2515 | r = -errno; | |
2516 | ||
57cd2192 LP |
2517 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2518 | ||
80876c20 LP |
2519 | close_nointr_nofail(fd); |
2520 | return r; | |
2521 | } | |
2522 | ||
9a34ec5f LP |
2523 | int sigaction_many(const struct sigaction *sa, ...) { |
2524 | va_list ap; | |
2525 | int r = 0, sig; | |
2526 | ||
2527 | va_start(ap, sa); | |
2528 | while ((sig = va_arg(ap, int)) > 0) | |
2529 | if (sigaction(sig, sa, NULL) < 0) | |
2530 | r = -errno; | |
2531 | va_end(ap); | |
2532 | ||
2533 | return r; | |
2534 | } | |
2535 | ||
2536 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2537 | struct sigaction sa; |
9a34ec5f LP |
2538 | va_list ap; |
2539 | int r = 0; | |
a337c6fc LP |
2540 | |
2541 | zero(sa); | |
2542 | sa.sa_handler = SIG_IGN; | |
2543 | sa.sa_flags = SA_RESTART; | |
2544 | ||
9a34ec5f LP |
2545 | if (sigaction(sig, &sa, NULL) < 0) |
2546 | r = -errno; | |
2547 | ||
2548 | va_start(ap, sig); | |
2549 | while ((sig = va_arg(ap, int)) > 0) | |
2550 | if (sigaction(sig, &sa, NULL) < 0) | |
2551 | r = -errno; | |
2552 | va_end(ap); | |
2553 | ||
2554 | return r; | |
2555 | } | |
2556 | ||
2557 | int default_signals(int sig, ...) { | |
2558 | struct sigaction sa; | |
2559 | va_list ap; | |
2560 | int r = 0; | |
2561 | ||
2562 | zero(sa); | |
2563 | sa.sa_handler = SIG_DFL; | |
2564 | sa.sa_flags = SA_RESTART; | |
2565 | ||
2566 | if (sigaction(sig, &sa, NULL) < 0) | |
2567 | r = -errno; | |
2568 | ||
2569 | va_start(ap, sig); | |
2570 | while ((sig = va_arg(ap, int)) > 0) | |
2571 | if (sigaction(sig, &sa, NULL) < 0) | |
2572 | r = -errno; | |
2573 | va_end(ap); | |
2574 | ||
2575 | return r; | |
a337c6fc LP |
2576 | } |
2577 | ||
8d567588 LP |
2578 | int close_pipe(int p[]) { |
2579 | int a = 0, b = 0; | |
2580 | ||
2581 | assert(p); | |
2582 | ||
2583 | if (p[0] >= 0) { | |
2584 | a = close_nointr(p[0]); | |
2585 | p[0] = -1; | |
2586 | } | |
2587 | ||
2588 | if (p[1] >= 0) { | |
2589 | b = close_nointr(p[1]); | |
2590 | p[1] = -1; | |
2591 | } | |
2592 | ||
2593 | return a < 0 ? a : b; | |
2594 | } | |
2595 | ||
eb22ac37 | 2596 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2597 | uint8_t *p; |
2598 | ssize_t n = 0; | |
2599 | ||
2600 | assert(fd >= 0); | |
2601 | assert(buf); | |
2602 | ||
2603 | p = buf; | |
2604 | ||
2605 | while (nbytes > 0) { | |
2606 | ssize_t k; | |
2607 | ||
2608 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2609 | ||
eb22ac37 | 2610 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2611 | continue; |
2612 | ||
eb22ac37 | 2613 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2614 | struct pollfd pollfd; |
2615 | ||
2616 | zero(pollfd); | |
2617 | pollfd.fd = fd; | |
2618 | pollfd.events = POLLIN; | |
2619 | ||
2620 | if (poll(&pollfd, 1, -1) < 0) { | |
2621 | if (errno == EINTR) | |
2622 | continue; | |
2623 | ||
2624 | return n > 0 ? n : -errno; | |
2625 | } | |
2626 | ||
2627 | if (pollfd.revents != POLLIN) | |
2628 | return n > 0 ? n : -EIO; | |
2629 | ||
2630 | continue; | |
2631 | } | |
2632 | ||
2633 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2634 | } | |
2635 | ||
2636 | p += k; | |
2637 | nbytes -= k; | |
2638 | n += k; | |
2639 | } | |
2640 | ||
2641 | return n; | |
2642 | } | |
2643 | ||
eb22ac37 LP |
2644 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2645 | const uint8_t *p; | |
2646 | ssize_t n = 0; | |
2647 | ||
2648 | assert(fd >= 0); | |
2649 | assert(buf); | |
2650 | ||
2651 | p = buf; | |
2652 | ||
2653 | while (nbytes > 0) { | |
2654 | ssize_t k; | |
2655 | ||
fe652127 LP |
2656 | k = write(fd, p, nbytes); |
2657 | if (k <= 0) { | |
eb22ac37 LP |
2658 | |
2659 | if (k < 0 && errno == EINTR) | |
2660 | continue; | |
2661 | ||
2662 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2663 | struct pollfd pollfd; | |
2664 | ||
2665 | zero(pollfd); | |
2666 | pollfd.fd = fd; | |
2667 | pollfd.events = POLLOUT; | |
2668 | ||
2669 | if (poll(&pollfd, 1, -1) < 0) { | |
2670 | if (errno == EINTR) | |
2671 | continue; | |
2672 | ||
2673 | return n > 0 ? n : -errno; | |
2674 | } | |
2675 | ||
2676 | if (pollfd.revents != POLLOUT) | |
2677 | return n > 0 ? n : -EIO; | |
2678 | ||
2679 | continue; | |
2680 | } | |
2681 | ||
2682 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2683 | } | |
2684 | ||
2685 | p += k; | |
2686 | nbytes -= k; | |
2687 | n += k; | |
2688 | } | |
2689 | ||
2690 | return n; | |
2691 | } | |
2692 | ||
24a6e4a4 LP |
2693 | int parse_usec(const char *t, usec_t *usec) { |
2694 | static const struct { | |
2695 | const char *suffix; | |
2696 | usec_t usec; | |
2697 | } table[] = { | |
2698 | { "sec", USEC_PER_SEC }, | |
2699 | { "s", USEC_PER_SEC }, | |
2700 | { "min", USEC_PER_MINUTE }, | |
2701 | { "hr", USEC_PER_HOUR }, | |
2702 | { "h", USEC_PER_HOUR }, | |
2703 | { "d", USEC_PER_DAY }, | |
2704 | { "w", USEC_PER_WEEK }, | |
2705 | { "msec", USEC_PER_MSEC }, | |
2706 | { "ms", USEC_PER_MSEC }, | |
2707 | { "m", USEC_PER_MINUTE }, | |
2708 | { "usec", 1ULL }, | |
2709 | { "us", 1ULL }, | |
2710 | { "", USEC_PER_SEC }, | |
2711 | }; | |
2712 | ||
2713 | const char *p; | |
2714 | usec_t r = 0; | |
2715 | ||
2716 | assert(t); | |
2717 | assert(usec); | |
2718 | ||
2719 | p = t; | |
2720 | do { | |
2721 | long long l; | |
2722 | char *e; | |
2723 | unsigned i; | |
2724 | ||
2725 | errno = 0; | |
2726 | l = strtoll(p, &e, 10); | |
2727 | ||
2728 | if (errno != 0) | |
2729 | return -errno; | |
2730 | ||
2731 | if (l < 0) | |
2732 | return -ERANGE; | |
2733 | ||
2734 | if (e == p) | |
2735 | return -EINVAL; | |
2736 | ||
2737 | e += strspn(e, WHITESPACE); | |
2738 | ||
2739 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2740 | if (startswith(e, table[i].suffix)) { | |
2741 | r += (usec_t) l * table[i].usec; | |
2742 | p = e + strlen(table[i].suffix); | |
2743 | break; | |
2744 | } | |
2745 | ||
2746 | if (i >= ELEMENTSOF(table)) | |
2747 | return -EINVAL; | |
2748 | ||
2749 | } while (*p != 0); | |
2750 | ||
2751 | *usec = r; | |
2752 | ||
2753 | return 0; | |
2754 | } | |
2755 | ||
ab1f0633 LP |
2756 | int parse_bytes(const char *t, off_t *bytes) { |
2757 | static const struct { | |
2758 | const char *suffix; | |
2759 | off_t factor; | |
2760 | } table[] = { | |
2761 | { "B", 1 }, | |
2762 | { "K", 1024ULL }, | |
2763 | { "M", 1024ULL*1024ULL }, | |
2764 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2765 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2766 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2767 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2768 | { "", 1 }, |
2769 | }; | |
2770 | ||
2771 | const char *p; | |
2772 | off_t r = 0; | |
2773 | ||
2774 | assert(t); | |
2775 | assert(bytes); | |
2776 | ||
2777 | p = t; | |
2778 | do { | |
2779 | long long l; | |
2780 | char *e; | |
2781 | unsigned i; | |
2782 | ||
2783 | errno = 0; | |
2784 | l = strtoll(p, &e, 10); | |
2785 | ||
2786 | if (errno != 0) | |
2787 | return -errno; | |
2788 | ||
2789 | if (l < 0) | |
2790 | return -ERANGE; | |
2791 | ||
2792 | if (e == p) | |
2793 | return -EINVAL; | |
2794 | ||
2795 | e += strspn(e, WHITESPACE); | |
2796 | ||
2797 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2798 | if (startswith(e, table[i].suffix)) { | |
2799 | r += (off_t) l * table[i].factor; | |
2800 | p = e + strlen(table[i].suffix); | |
2801 | break; | |
2802 | } | |
2803 | ||
2804 | if (i >= ELEMENTSOF(table)) | |
2805 | return -EINVAL; | |
2806 | ||
2807 | } while (*p != 0); | |
2808 | ||
2809 | *bytes = r; | |
2810 | ||
2811 | return 0; | |
2812 | } | |
2813 | ||
843d2643 LP |
2814 | int make_stdio(int fd) { |
2815 | int r, s, t; | |
2816 | ||
2817 | assert(fd >= 0); | |
2818 | ||
2819 | r = dup2(fd, STDIN_FILENO); | |
2820 | s = dup2(fd, STDOUT_FILENO); | |
2821 | t = dup2(fd, STDERR_FILENO); | |
2822 | ||
2823 | if (fd >= 3) | |
2824 | close_nointr_nofail(fd); | |
2825 | ||
2826 | if (r < 0 || s < 0 || t < 0) | |
2827 | return -errno; | |
2828 | ||
7862f62d LP |
2829 | fd_cloexec(STDIN_FILENO, false); |
2830 | fd_cloexec(STDOUT_FILENO, false); | |
2831 | fd_cloexec(STDERR_FILENO, false); | |
2832 | ||
843d2643 LP |
2833 | return 0; |
2834 | } | |
2835 | ||
ade509ce LP |
2836 | int make_null_stdio(void) { |
2837 | int null_fd; | |
2838 | ||
2839 | if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) | |
2840 | return -errno; | |
2841 | ||
2842 | return make_stdio(null_fd); | |
2843 | } | |
2844 | ||
8407a5d0 LP |
2845 | bool is_device_path(const char *path) { |
2846 | ||
2847 | /* Returns true on paths that refer to a device, either in | |
2848 | * sysfs or in /dev */ | |
2849 | ||
2850 | return | |
2851 | path_startswith(path, "/dev/") || | |
2852 | path_startswith(path, "/sys/"); | |
2853 | } | |
2854 | ||
01f78473 LP |
2855 | int dir_is_empty(const char *path) { |
2856 | DIR *d; | |
2857 | int r; | |
2858 | struct dirent buf, *de; | |
2859 | ||
2860 | if (!(d = opendir(path))) | |
2861 | return -errno; | |
2862 | ||
2863 | for (;;) { | |
2864 | if ((r = readdir_r(d, &buf, &de)) > 0) { | |
2865 | r = -r; | |
2866 | break; | |
2867 | } | |
2868 | ||
2869 | if (!de) { | |
2870 | r = 1; | |
2871 | break; | |
2872 | } | |
2873 | ||
2874 | if (!ignore_file(de->d_name)) { | |
2875 | r = 0; | |
2876 | break; | |
2877 | } | |
2878 | } | |
2879 | ||
2880 | closedir(d); | |
2881 | return r; | |
2882 | } | |
2883 | ||
d3782d60 LP |
2884 | unsigned long long random_ull(void) { |
2885 | int fd; | |
2886 | uint64_t ull; | |
2887 | ssize_t r; | |
2888 | ||
2889 | if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0) | |
2890 | goto fallback; | |
2891 | ||
eb22ac37 | 2892 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
2893 | close_nointr_nofail(fd); |
2894 | ||
2895 | if (r != sizeof(ull)) | |
2896 | goto fallback; | |
2897 | ||
2898 | return ull; | |
2899 | ||
2900 | fallback: | |
2901 | return random() * RAND_MAX + random(); | |
2902 | } | |
2903 | ||
5b6319dc LP |
2904 | void rename_process(const char name[8]) { |
2905 | assert(name); | |
2906 | ||
5d6b1584 LP |
2907 | /* This is a like a poor man's setproctitle(). It changes the |
2908 | * comm field, argv[0], and also the glibc's internally used | |
2909 | * name of the process. For the first one a limit of 16 chars | |
2910 | * applies, to the second one usually one of 10 (i.e. length | |
2911 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2912 | * "systemd"). If you pass a longer string it will be | |
2913 | * truncated */ | |
5b6319dc | 2914 | |
5d6b1584 | 2915 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2916 | |
2917 | if (program_invocation_name) | |
2918 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2919 | |
2920 | if (saved_argc > 0) { | |
2921 | int i; | |
2922 | ||
2923 | if (saved_argv[0]) | |
2924 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2925 | ||
2926 | for (i = 1; i < saved_argc; i++) { | |
2927 | if (!saved_argv[i]) | |
2928 | break; | |
2929 | ||
2930 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
2931 | } | |
2932 | } | |
5b6319dc LP |
2933 | } |
2934 | ||
7d793605 LP |
2935 | void sigset_add_many(sigset_t *ss, ...) { |
2936 | va_list ap; | |
2937 | int sig; | |
2938 | ||
2939 | assert(ss); | |
2940 | ||
2941 | va_start(ap, ss); | |
2942 | while ((sig = va_arg(ap, int)) > 0) | |
2943 | assert_se(sigaddset(ss, sig) == 0); | |
2944 | va_end(ap); | |
2945 | } | |
2946 | ||
ef2f1067 LP |
2947 | char* gethostname_malloc(void) { |
2948 | struct utsname u; | |
2949 | ||
2950 | assert_se(uname(&u) >= 0); | |
2951 | ||
344de609 | 2952 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2953 | return strdup(u.nodename); |
2954 | ||
2955 | return strdup(u.sysname); | |
2956 | } | |
2957 | ||
344de609 LP |
2958 | bool hostname_is_set(void) { |
2959 | struct utsname u; | |
2960 | ||
2961 | assert_se(uname(&u) >= 0); | |
2962 | ||
2963 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2964 | } | |
2965 | ||
ef2f1067 LP |
2966 | char* getlogname_malloc(void) { |
2967 | uid_t uid; | |
2968 | long bufsize; | |
2969 | char *buf, *name; | |
2970 | struct passwd pwbuf, *pw = NULL; | |
2971 | struct stat st; | |
2972 | ||
2973 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2974 | uid = st.st_uid; | |
2975 | else | |
2976 | uid = getuid(); | |
2977 | ||
2978 | /* Shortcut things to avoid NSS lookups */ | |
2979 | if (uid == 0) | |
2980 | return strdup("root"); | |
2981 | ||
2982 | if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0) | |
2983 | bufsize = 4096; | |
2984 | ||
2985 | if (!(buf = malloc(bufsize))) | |
2986 | return NULL; | |
2987 | ||
2988 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) { | |
2989 | name = strdup(pw->pw_name); | |
2990 | free(buf); | |
2991 | return name; | |
2992 | } | |
2993 | ||
2994 | free(buf); | |
2995 | ||
2996 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
2997 | return NULL; | |
2998 | ||
2999 | return name; | |
3000 | } | |
3001 | ||
fc116c6a LP |
3002 | int getttyname_malloc(int fd, char **r) { |
3003 | char path[PATH_MAX], *c; | |
618e02c7 | 3004 | int k; |
8c6db833 LP |
3005 | |
3006 | assert(r); | |
ef2f1067 | 3007 | |
fc116c6a | 3008 | if ((k = ttyname_r(fd, path, sizeof(path))) != 0) |
618e02c7 | 3009 | return -k; |
ef2f1067 LP |
3010 | |
3011 | char_array_0(path); | |
3012 | ||
fc116c6a | 3013 | if (!(c = strdup(startswith(path, "/dev/") ? path + 5 : path))) |
8c6db833 LP |
3014 | return -ENOMEM; |
3015 | ||
3016 | *r = c; | |
3017 | return 0; | |
3018 | } | |
3019 | ||
fc116c6a LP |
3020 | int getttyname_harder(int fd, char **r) { |
3021 | int k; | |
3022 | char *s; | |
3023 | ||
3024 | if ((k = getttyname_malloc(fd, &s)) < 0) | |
3025 | return k; | |
3026 | ||
3027 | if (streq(s, "tty")) { | |
3028 | free(s); | |
4d6d6518 | 3029 | return get_ctty(0, NULL, r); |
fc116c6a LP |
3030 | } |
3031 | ||
3032 | *r = s; | |
3033 | return 0; | |
3034 | } | |
3035 | ||
4d6d6518 | 3036 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
fc116c6a | 3037 | int k; |
4d6d6518 | 3038 | char line[LINE_MAX], *p, *fn; |
fc116c6a LP |
3039 | unsigned long ttynr; |
3040 | FILE *f; | |
3041 | ||
4d6d6518 LP |
3042 | if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0) |
3043 | return -ENOMEM; | |
3044 | ||
3045 | f = fopen(fn, "re"); | |
3046 | free(fn); | |
3047 | if (!f) | |
fc116c6a LP |
3048 | return -errno; |
3049 | ||
4d6d6518 | 3050 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 3051 | k = feof(f) ? -EIO : -errno; |
fc116c6a LP |
3052 | fclose(f); |
3053 | return k; | |
3054 | } | |
3055 | ||
3056 | fclose(f); | |
3057 | ||
4d6d6518 LP |
3058 | p = strrchr(line, ')'); |
3059 | if (!p) | |
fc116c6a LP |
3060 | return -EIO; |
3061 | ||
3062 | p++; | |
3063 | ||
3064 | if (sscanf(p, " " | |
3065 | "%*c " /* state */ | |
3066 | "%*d " /* ppid */ | |
3067 | "%*d " /* pgrp */ | |
3068 | "%*d " /* session */ | |
3069 | "%lu ", /* ttynr */ | |
3070 | &ttynr) != 1) | |
3071 | return -EIO; | |
3072 | ||
3073 | *d = (dev_t) ttynr; | |
3074 | return 0; | |
3075 | } | |
3076 | ||
4d6d6518 | 3077 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 3078 | int k; |
20c03b7b | 3079 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
3080 | dev_t devnr; |
3081 | ||
3082 | assert(r); | |
3083 | ||
4d6d6518 LP |
3084 | k = get_ctty_devnr(pid, &devnr); |
3085 | if (k < 0) | |
fc116c6a LP |
3086 | return k; |
3087 | ||
3088 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
3089 | char_array_0(fn); | |
3090 | ||
3091 | if ((k = readlink_malloc(fn, &s)) < 0) { | |
3092 | ||
3093 | if (k != -ENOENT) | |
3094 | return k; | |
3095 | ||
46824d0e LP |
3096 | /* This is an ugly hack */ |
3097 | if (major(devnr) == 136) { | |
3098 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
3099 | return -ENOMEM; | |
3100 | ||
3101 | *r = b; | |
3102 | if (_devnr) | |
3103 | *_devnr = devnr; | |
3104 | ||
3105 | return 0; | |
3106 | } | |
3107 | ||
fc116c6a LP |
3108 | /* Probably something like the ptys which have no |
3109 | * symlink in /dev/char. Let's return something | |
3110 | * vaguely useful. */ | |
3111 | ||
3112 | if (!(b = strdup(fn + 5))) | |
3113 | return -ENOMEM; | |
3114 | ||
3115 | *r = b; | |
46824d0e LP |
3116 | if (_devnr) |
3117 | *_devnr = devnr; | |
3118 | ||
fc116c6a LP |
3119 | return 0; |
3120 | } | |
3121 | ||
3122 | if (startswith(s, "/dev/")) | |
3123 | p = s + 5; | |
3124 | else if (startswith(s, "../")) | |
3125 | p = s + 3; | |
3126 | else | |
3127 | p = s; | |
3128 | ||
3129 | b = strdup(p); | |
3130 | free(s); | |
3131 | ||
3132 | if (!b) | |
3133 | return -ENOMEM; | |
3134 | ||
3135 | *r = b; | |
46824d0e LP |
3136 | if (_devnr) |
3137 | *_devnr = devnr; | |
3138 | ||
fc116c6a LP |
3139 | return 0; |
3140 | } | |
3141 | ||
f67cc036 | 3142 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky) { |
8c6db833 LP |
3143 | DIR *d; |
3144 | int ret = 0; | |
3145 | ||
3146 | assert(fd >= 0); | |
3147 | ||
3148 | /* This returns the first error we run into, but nevertheless | |
3149 | * tries to go on */ | |
3150 | ||
d4d046e3 LP |
3151 | d = fdopendir(fd); |
3152 | if (!d) { | |
8c6db833 | 3153 | close_nointr_nofail(fd); |
4c633005 LP |
3154 | |
3155 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
3156 | } |
3157 | ||
3158 | for (;;) { | |
3159 | struct dirent buf, *de; | |
ad293f5a | 3160 | bool is_dir, keep_around = false; |
8c6db833 LP |
3161 | int r; |
3162 | ||
d4d046e3 LP |
3163 | r = readdir_r(d, &buf, &de); |
3164 | if (r != 0 && ret == 0) { | |
3165 | ret = -r; | |
8c6db833 LP |
3166 | break; |
3167 | } | |
3168 | ||
3169 | if (!de) | |
3170 | break; | |
3171 | ||
3172 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
3173 | continue; | |
3174 | ||
3175 | if (de->d_type == DT_UNKNOWN) { | |
3176 | struct stat st; | |
3177 | ||
3178 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { | |
4c633005 | 3179 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3180 | ret = -errno; |
3181 | continue; | |
3182 | } | |
3183 | ||
ad293f5a | 3184 | if (honour_sticky) |
8d53b453 LP |
3185 | keep_around = |
3186 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
3187 | (st.st_mode & S_ISVTX); | |
ad293f5a | 3188 | |
8c6db833 | 3189 | is_dir = S_ISDIR(st.st_mode); |
ad293f5a LP |
3190 | |
3191 | } else { | |
3192 | if (honour_sticky) { | |
3193 | struct stat st; | |
3194 | ||
3195 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { | |
3196 | if (ret == 0 && errno != ENOENT) | |
3197 | ret = -errno; | |
3198 | continue; | |
3199 | } | |
3200 | ||
8d53b453 LP |
3201 | keep_around = |
3202 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
3203 | (st.st_mode & S_ISVTX); | |
ad293f5a LP |
3204 | } |
3205 | ||
8c6db833 | 3206 | is_dir = de->d_type == DT_DIR; |
ad293f5a | 3207 | } |
8c6db833 LP |
3208 | |
3209 | if (is_dir) { | |
3210 | int subdir_fd; | |
3211 | ||
d4d046e3 | 3212 | subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
5ebff533 | 3213 | if (subdir_fd < 0) { |
4c633005 | 3214 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3215 | ret = -errno; |
3216 | continue; | |
3217 | } | |
3218 | ||
d4d046e3 LP |
3219 | r = rm_rf_children(subdir_fd, only_dirs, honour_sticky); |
3220 | if (r < 0 && ret == 0) | |
3221 | ret = r; | |
8c6db833 | 3222 | |
ad293f5a LP |
3223 | if (!keep_around) |
3224 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
3225 | if (ret == 0 && errno != ENOENT) | |
3226 | ret = -errno; | |
3227 | } | |
3228 | ||
3229 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
3230 | |
3231 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3232 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3233 | ret = -errno; |
3234 | } | |
3235 | } | |
3236 | } | |
3237 | ||
3238 | closedir(d); | |
3239 | ||
3240 | return ret; | |
3241 | } | |
3242 | ||
ad293f5a | 3243 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
8c6db833 LP |
3244 | int fd; |
3245 | int r; | |
3246 | ||
3247 | assert(path); | |
3248 | ||
d4d046e3 LP |
3249 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
3250 | if (fd < 0) { | |
8c6db833 LP |
3251 | |
3252 | if (errno != ENOTDIR) | |
3253 | return -errno; | |
3254 | ||
3255 | if (delete_root && !only_dirs) | |
d4d046e3 | 3256 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
3257 | return -errno; |
3258 | ||
3259 | return 0; | |
3260 | } | |
3261 | ||
ad293f5a LP |
3262 | r = rm_rf_children(fd, only_dirs, honour_sticky); |
3263 | ||
3264 | if (delete_root) { | |
3265 | ||
8d53b453 | 3266 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 3267 | return r; |
8c6db833 | 3268 | |
e27796a0 | 3269 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
3270 | if (r == 0) |
3271 | r = -errno; | |
3272 | } | |
ad293f5a | 3273 | } |
8c6db833 LP |
3274 | |
3275 | return r; | |
3276 | } | |
3277 | ||
3278 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { | |
3279 | assert(path); | |
3280 | ||
3281 | /* Under the assumption that we are running privileged we | |
3282 | * first change the access mode and only then hand out | |
3283 | * ownership to avoid a window where access is too open. */ | |
3284 | ||
8d53b453 LP |
3285 | if (mode != (mode_t) -1) |
3286 | if (chmod(path, mode) < 0) | |
3287 | return -errno; | |
8c6db833 | 3288 | |
8d53b453 LP |
3289 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
3290 | if (chown(path, uid, gid) < 0) | |
3291 | return -errno; | |
8c6db833 LP |
3292 | |
3293 | return 0; | |
ef2f1067 LP |
3294 | } |
3295 | ||
f4b47811 LP |
3296 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
3297 | assert(fd >= 0); | |
3298 | ||
3299 | /* Under the assumption that we are running privileged we | |
3300 | * first change the access mode and only then hand out | |
3301 | * ownership to avoid a window where access is too open. */ | |
3302 | ||
3303 | if (fchmod(fd, mode) < 0) | |
3304 | return -errno; | |
3305 | ||
3306 | if (fchown(fd, uid, gid) < 0) | |
3307 | return -errno; | |
3308 | ||
3309 | return 0; | |
3310 | } | |
3311 | ||
82c121a4 LP |
3312 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3313 | cpu_set_t *r; | |
3314 | unsigned n = 1024; | |
3315 | ||
3316 | /* Allocates the cpuset in the right size */ | |
3317 | ||
3318 | for (;;) { | |
3319 | if (!(r = CPU_ALLOC(n))) | |
3320 | return NULL; | |
3321 | ||
3322 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3323 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3324 | ||
3325 | if (ncpus) | |
3326 | *ncpus = n; | |
3327 | ||
3328 | return r; | |
3329 | } | |
3330 | ||
3331 | CPU_FREE(r); | |
3332 | ||
3333 | if (errno != EINVAL) | |
3334 | return NULL; | |
3335 | ||
3336 | n *= 2; | |
3337 | } | |
3338 | } | |
3339 | ||
67e5cc4f | 3340 | void status_vprintf(const char *status, bool ellipse, const char *format, va_list ap) { |
9ab7a8d2 MS |
3341 | char *s = NULL; |
3342 | static const char status_indent[] = " "; /* "[" STATUS "] " */ | |
3343 | int fd = -1; | |
81beb750 LP |
3344 | struct iovec iovec[5]; |
3345 | int n = 0; | |
9e58ff9c LP |
3346 | |
3347 | assert(format); | |
3348 | ||
9ab7a8d2 | 3349 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
3350 | * optional and go exclusively to the console. */ |
3351 | ||
3352 | if (vasprintf(&s, format, ap) < 0) | |
3353 | goto finish; | |
3354 | ||
67e5cc4f | 3355 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 3356 | if (fd < 0) |
9e58ff9c LP |
3357 | goto finish; |
3358 | ||
67e5cc4f | 3359 | if (ellipse) { |
9ab7a8d2 MS |
3360 | char *e; |
3361 | size_t emax, sl; | |
3362 | int c; | |
3363 | ||
67e5cc4f LP |
3364 | c = fd_columns(fd); |
3365 | if (c <= 0) | |
3366 | c = 80; | |
81beb750 | 3367 | |
9ab7a8d2 MS |
3368 | sl = status ? strlen(status_indent) : 0; |
3369 | ||
3370 | emax = c - sl - 1; | |
3371 | if (emax < 3) | |
3372 | emax = 3; | |
81beb750 | 3373 | |
67e5cc4f LP |
3374 | e = ellipsize(s, emax, 75); |
3375 | if (e) { | |
3376 | free(s); | |
3377 | s = e; | |
3378 | } | |
81beb750 LP |
3379 | } |
3380 | ||
3381 | zero(iovec); | |
81beb750 | 3382 | |
9ab7a8d2 MS |
3383 | if (status) { |
3384 | if (!isempty(status)) { | |
3385 | IOVEC_SET_STRING(iovec[n++], "["); | |
3386 | IOVEC_SET_STRING(iovec[n++], status); | |
3387 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3388 | } else | |
3389 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3390 | } |
3391 | ||
9ab7a8d2 MS |
3392 | IOVEC_SET_STRING(iovec[n++], s); |
3393 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 LP |
3394 | |
3395 | writev(fd, iovec, n); | |
9e58ff9c LP |
3396 | |
3397 | finish: | |
3398 | free(s); | |
3399 | ||
3400 | if (fd >= 0) | |
3401 | close_nointr_nofail(fd); | |
3402 | } | |
3403 | ||
67e5cc4f | 3404 | void status_printf(const char *status, bool ellipse, const char *format, ...) { |
c846ff47 LP |
3405 | va_list ap; |
3406 | ||
3407 | assert(format); | |
3408 | ||
3409 | va_start(ap, format); | |
67e5cc4f | 3410 | status_vprintf(status, ellipse, format, ap); |
c846ff47 LP |
3411 | va_end(ap); |
3412 | } | |
3413 | ||
3414 | void status_welcome(void) { | |
10aa7034 LP |
3415 | char *pretty_name = NULL, *ansi_color = NULL; |
3416 | const char *const_pretty = NULL, *const_color = NULL; | |
3417 | int r; | |
c846ff47 | 3418 | |
10aa7034 LP |
3419 | if ((r = parse_env_file("/etc/os-release", NEWLINE, |
3420 | "PRETTY_NAME", &pretty_name, | |
3421 | "ANSI_COLOR", &ansi_color, | |
3422 | NULL)) < 0) { | |
c846ff47 | 3423 | |
10aa7034 LP |
3424 | if (r != -ENOENT) |
3425 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3426 | } | |
c846ff47 | 3427 | |
10aa7034 LP |
3428 | if (!pretty_name && !const_pretty) |
3429 | const_pretty = "Linux"; | |
3430 | ||
3431 | if (!ansi_color && !const_color) | |
3432 | const_color = "1"; | |
3433 | ||
81beb750 | 3434 | status_printf(NULL, |
67e5cc4f | 3435 | false, |
81beb750 | 3436 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", |
10aa7034 LP |
3437 | const_color ? const_color : ansi_color, |
3438 | const_pretty ? const_pretty : pretty_name); | |
86a3475b LP |
3439 | |
3440 | free(ansi_color); | |
3441 | free(pretty_name); | |
c846ff47 LP |
3442 | } |
3443 | ||
fab56fc5 LP |
3444 | char *replace_env(const char *format, char **env) { |
3445 | enum { | |
3446 | WORD, | |
c24eb49e | 3447 | CURLY, |
fab56fc5 LP |
3448 | VARIABLE |
3449 | } state = WORD; | |
3450 | ||
3451 | const char *e, *word = format; | |
3452 | char *r = NULL, *k; | |
3453 | ||
3454 | assert(format); | |
3455 | ||
3456 | for (e = format; *e; e ++) { | |
3457 | ||
3458 | switch (state) { | |
3459 | ||
3460 | case WORD: | |
3461 | if (*e == '$') | |
c24eb49e | 3462 | state = CURLY; |
fab56fc5 LP |
3463 | break; |
3464 | ||
c24eb49e LP |
3465 | case CURLY: |
3466 | if (*e == '{') { | |
fab56fc5 LP |
3467 | if (!(k = strnappend(r, word, e-word-1))) |
3468 | goto fail; | |
3469 | ||
3470 | free(r); | |
3471 | r = k; | |
3472 | ||
3473 | word = e-1; | |
3474 | state = VARIABLE; | |
3475 | ||
3476 | } else if (*e == '$') { | |
3477 | if (!(k = strnappend(r, word, e-word))) | |
3478 | goto fail; | |
3479 | ||
3480 | free(r); | |
3481 | r = k; | |
3482 | ||
3483 | word = e+1; | |
3484 | state = WORD; | |
3485 | } else | |
3486 | state = WORD; | |
3487 | break; | |
3488 | ||
3489 | case VARIABLE: | |
c24eb49e | 3490 | if (*e == '}') { |
b95cf362 | 3491 | const char *t; |
fab56fc5 | 3492 | |
b95cf362 LP |
3493 | if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) |
3494 | t = ""; | |
fab56fc5 | 3495 | |
b95cf362 LP |
3496 | if (!(k = strappend(r, t))) |
3497 | goto fail; | |
fab56fc5 | 3498 | |
b95cf362 LP |
3499 | free(r); |
3500 | r = k; | |
fab56fc5 | 3501 | |
b95cf362 | 3502 | word = e+1; |
fab56fc5 LP |
3503 | state = WORD; |
3504 | } | |
3505 | break; | |
3506 | } | |
3507 | } | |
3508 | ||
3509 | if (!(k = strnappend(r, word, e-word))) | |
3510 | goto fail; | |
3511 | ||
3512 | free(r); | |
3513 | return k; | |
3514 | ||
3515 | fail: | |
3516 | free(r); | |
3517 | return NULL; | |
3518 | } | |
3519 | ||
3520 | char **replace_env_argv(char **argv, char **env) { | |
3521 | char **r, **i; | |
c24eb49e LP |
3522 | unsigned k = 0, l = 0; |
3523 | ||
3524 | l = strv_length(argv); | |
fab56fc5 | 3525 | |
c24eb49e | 3526 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3527 | return NULL; |
3528 | ||
3529 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3530 | |
3531 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3532 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3533 | char *e; | |
3534 | char **w, **m; | |
3535 | unsigned q; | |
c24eb49e | 3536 | |
b95cf362 | 3537 | if ((e = strv_env_get(env, *i+1))) { |
c24eb49e LP |
3538 | |
3539 | if (!(m = strv_split_quoted(e))) { | |
3540 | r[k] = NULL; | |
3541 | strv_free(r); | |
3542 | return NULL; | |
3543 | } | |
b95cf362 LP |
3544 | } else |
3545 | m = NULL; | |
c24eb49e | 3546 | |
b95cf362 LP |
3547 | q = strv_length(m); |
3548 | l = l + q - 1; | |
c24eb49e | 3549 | |
b95cf362 LP |
3550 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3551 | r[k] = NULL; | |
3552 | strv_free(r); | |
3553 | strv_free(m); | |
3554 | return NULL; | |
3555 | } | |
c24eb49e | 3556 | |
b95cf362 LP |
3557 | r = w; |
3558 | if (m) { | |
c24eb49e LP |
3559 | memcpy(r + k, m, q * sizeof(char*)); |
3560 | free(m); | |
c24eb49e | 3561 | } |
b95cf362 LP |
3562 | |
3563 | k += q; | |
3564 | continue; | |
c24eb49e LP |
3565 | } |
3566 | ||
3567 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3568 | if (!(r[k++] = replace_env(*i, env))) { |
3569 | strv_free(r); | |
3570 | return NULL; | |
3571 | } | |
3572 | } | |
3573 | ||
3574 | r[k] = NULL; | |
3575 | return r; | |
3576 | } | |
3577 | ||
81beb750 LP |
3578 | int fd_columns(int fd) { |
3579 | struct winsize ws; | |
3580 | zero(ws); | |
3581 | ||
3582 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3583 | return -errno; | |
3584 | ||
3585 | if (ws.ws_col <= 0) | |
3586 | return -EIO; | |
3587 | ||
3588 | return ws.ws_col; | |
3589 | } | |
3590 | ||
72f59706 | 3591 | unsigned columns(void) { |
fa776d8e LP |
3592 | static __thread int parsed_columns = 0; |
3593 | const char *e; | |
3594 | ||
3bfc7184 | 3595 | if (_likely_(parsed_columns > 0)) |
fa776d8e LP |
3596 | return parsed_columns; |
3597 | ||
81beb750 LP |
3598 | e = getenv("COLUMNS"); |
3599 | if (e) | |
fa776d8e LP |
3600 | parsed_columns = atoi(e); |
3601 | ||
81beb750 LP |
3602 | if (parsed_columns <= 0) |
3603 | parsed_columns = fd_columns(STDOUT_FILENO); | |
fa776d8e LP |
3604 | |
3605 | if (parsed_columns <= 0) | |
3606 | parsed_columns = 80; | |
3607 | ||
3608 | return parsed_columns; | |
3609 | } | |
3610 | ||
8f2d43a0 LP |
3611 | int fd_lines(int fd) { |
3612 | struct winsize ws; | |
3613 | zero(ws); | |
3614 | ||
3615 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3616 | return -errno; | |
3617 | ||
3618 | if (ws.ws_row <= 0) | |
3619 | return -EIO; | |
3620 | ||
3621 | return ws.ws_row; | |
3622 | } | |
3623 | ||
3624 | unsigned lines(void) { | |
3625 | static __thread int parsed_lines = 0; | |
3626 | const char *e; | |
3627 | ||
3628 | if (_likely_(parsed_lines > 0)) | |
3629 | return parsed_lines; | |
3630 | ||
3631 | e = getenv("LINES"); | |
3632 | if (e) | |
3633 | parsed_lines = atoi(e); | |
3634 | ||
3635 | if (parsed_lines <= 0) | |
3636 | parsed_lines = fd_lines(STDOUT_FILENO); | |
3637 | ||
3638 | if (parsed_lines <= 0) | |
3639 | parsed_lines = 25; | |
3640 | ||
3641 | return parsed_lines; | |
3642 | } | |
3643 | ||
b4f10a5e LP |
3644 | int running_in_chroot(void) { |
3645 | struct stat a, b; | |
3646 | ||
3647 | zero(a); | |
3648 | zero(b); | |
3649 | ||
3650 | /* Only works as root */ | |
3651 | ||
3652 | if (stat("/proc/1/root", &a) < 0) | |
3653 | return -errno; | |
3654 | ||
3655 | if (stat("/", &b) < 0) | |
3656 | return -errno; | |
3657 | ||
3658 | return | |
3659 | a.st_dev != b.st_dev || | |
3660 | a.st_ino != b.st_ino; | |
3661 | } | |
3662 | ||
72f59706 LP |
3663 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3664 | size_t x; | |
8fe914ec LP |
3665 | char *r; |
3666 | ||
3667 | assert(s); | |
3668 | assert(percent <= 100); | |
72f59706 | 3669 | assert(new_length >= 3); |
8fe914ec | 3670 | |
72f59706 LP |
3671 | if (old_length <= 3 || old_length <= new_length) |
3672 | return strndup(s, old_length); | |
8fe914ec | 3673 | |
72f59706 LP |
3674 | r = new0(char, new_length+1); |
3675 | if (!r) | |
8fe914ec LP |
3676 | return r; |
3677 | ||
72f59706 | 3678 | x = (new_length * percent) / 100; |
8fe914ec | 3679 | |
72f59706 LP |
3680 | if (x > new_length - 3) |
3681 | x = new_length - 3; | |
8fe914ec LP |
3682 | |
3683 | memcpy(r, s, x); | |
3684 | r[x] = '.'; | |
3685 | r[x+1] = '.'; | |
3686 | r[x+2] = '.'; | |
3687 | memcpy(r + x + 3, | |
72f59706 LP |
3688 | s + old_length - (new_length - x - 3), |
3689 | new_length - x - 3); | |
8fe914ec LP |
3690 | |
3691 | return r; | |
3692 | } | |
3693 | ||
72f59706 LP |
3694 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3695 | return ellipsize_mem(s, strlen(s), length, percent); | |
3696 | } | |
3697 | ||
f6144808 LP |
3698 | int touch(const char *path) { |
3699 | int fd; | |
3700 | ||
3701 | assert(path); | |
3702 | ||
14f3c825 | 3703 | if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0) |
f6144808 LP |
3704 | return -errno; |
3705 | ||
3706 | close_nointr_nofail(fd); | |
3707 | return 0; | |
3708 | } | |
afea26ad | 3709 | |
97c4a07d | 3710 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3711 | size_t l; |
3712 | assert(s); | |
3713 | ||
31ed59c5 LP |
3714 | l = strlen(s); |
3715 | if (l < 2) | |
11ce3427 LP |
3716 | return strdup(s); |
3717 | ||
97c4a07d | 3718 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3719 | return strndup(s+1, l-2); |
3720 | ||
3721 | return strdup(s); | |
3722 | } | |
3723 | ||
5f7c426e LP |
3724 | char *normalize_env_assignment(const char *s) { |
3725 | char *name, *value, *p, *r; | |
3726 | ||
3727 | p = strchr(s, '='); | |
3728 | ||
3729 | if (!p) { | |
3730 | if (!(r = strdup(s))) | |
3731 | return NULL; | |
3732 | ||
3733 | return strstrip(r); | |
3734 | } | |
3735 | ||
3736 | if (!(name = strndup(s, p - s))) | |
3737 | return NULL; | |
3738 | ||
3739 | if (!(p = strdup(p+1))) { | |
3740 | free(name); | |
3741 | return NULL; | |
3742 | } | |
3743 | ||
3744 | value = unquote(strstrip(p), QUOTES); | |
3745 | free(p); | |
3746 | ||
3747 | if (!value) { | |
5f7c426e LP |
3748 | free(name); |
3749 | return NULL; | |
3750 | } | |
3751 | ||
3752 | if (asprintf(&r, "%s=%s", name, value) < 0) | |
3753 | r = NULL; | |
3754 | ||
3755 | free(value); | |
3756 | free(name); | |
3757 | ||
3758 | return r; | |
3759 | } | |
3760 | ||
8e12a6ae | 3761 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3762 | siginfo_t dummy; |
3763 | ||
2e78aa99 | 3764 | assert(pid >= 1); |
1968a360 LP |
3765 | |
3766 | if (!status) | |
3767 | status = &dummy; | |
2e78aa99 LP |
3768 | |
3769 | for (;;) { | |
8e12a6ae LP |
3770 | zero(*status); |
3771 | ||
3772 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3773 | |
3774 | if (errno == EINTR) | |
3775 | continue; | |
3776 | ||
3777 | return -errno; | |
3778 | } | |
3779 | ||
3780 | return 0; | |
3781 | } | |
3782 | } | |
3783 | ||
97c4a07d LP |
3784 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3785 | int r; | |
3786 | siginfo_t status; | |
3787 | ||
3788 | assert(name); | |
3789 | assert(pid > 1); | |
3790 | ||
3791 | if ((r = wait_for_terminate(pid, &status)) < 0) { | |
3792 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); | |
3793 | return r; | |
3794 | } | |
3795 | ||
3796 | if (status.si_code == CLD_EXITED) { | |
3797 | if (status.si_status != 0) { | |
3798 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3799 | return status.si_status; |
97c4a07d LP |
3800 | } |
3801 | ||
3802 | log_debug("%s succeeded.", name); | |
3803 | return 0; | |
3804 | ||
3805 | } else if (status.si_code == CLD_KILLED || | |
3806 | status.si_code == CLD_DUMPED) { | |
3807 | ||
3808 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3809 | return -EPROTO; | |
3810 | } | |
3811 | ||
3812 | log_warning("%s failed due to unknown reason.", name); | |
3813 | return -EPROTO; | |
3814 | ||
3815 | } | |
3816 | ||
6a39419f | 3817 | _noreturn_ void freeze(void) { |
720ce21d LP |
3818 | |
3819 | /* Make sure nobody waits for us on a socket anymore */ | |
3820 | close_all_fds(NULL, 0); | |
3821 | ||
c29597a1 LP |
3822 | sync(); |
3823 | ||
3c14d26c LP |
3824 | for (;;) |
3825 | pause(); | |
3826 | } | |
3827 | ||
00dc5d76 LP |
3828 | bool null_or_empty(struct stat *st) { |
3829 | assert(st); | |
3830 | ||
3831 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3832 | return true; | |
3833 | ||
c8f26f42 | 3834 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3835 | return true; |
3836 | ||
3837 | return false; | |
3838 | } | |
3839 | ||
83096483 LP |
3840 | int null_or_empty_path(const char *fn) { |
3841 | struct stat st; | |
3842 | ||
3843 | assert(fn); | |
3844 | ||
3845 | if (stat(fn, &st) < 0) | |
3846 | return -errno; | |
3847 | ||
3848 | return null_or_empty(&st); | |
3849 | } | |
3850 | ||
a247755d | 3851 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3852 | int nfd; |
3853 | DIR *d; | |
3854 | ||
3855 | if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0) | |
3856 | return NULL; | |
3857 | ||
3858 | if (!(d = fdopendir(nfd))) { | |
3859 | close_nointr_nofail(nfd); | |
3860 | return NULL; | |
3861 | } | |
3862 | ||
3863 | return d; | |
3b63d2d3 LP |
3864 | } |
3865 | ||
8a0867d6 LP |
3866 | int signal_from_string_try_harder(const char *s) { |
3867 | int signo; | |
3868 | assert(s); | |
3869 | ||
3870 | if ((signo = signal_from_string(s)) <= 0) | |
3871 | if (startswith(s, "SIG")) | |
3872 | return signal_from_string(s+3); | |
3873 | ||
3874 | return signo; | |
3875 | } | |
3876 | ||
10717a1a LP |
3877 | void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { |
3878 | ||
3879 | assert(f); | |
3880 | assert(name); | |
3881 | assert(t); | |
3882 | ||
3883 | if (!dual_timestamp_is_set(t)) | |
3884 | return; | |
3885 | ||
3886 | fprintf(f, "%s=%llu %llu\n", | |
3887 | name, | |
3888 | (unsigned long long) t->realtime, | |
3889 | (unsigned long long) t->monotonic); | |
3890 | } | |
3891 | ||
799fd0fd | 3892 | void dual_timestamp_deserialize(const char *value, dual_timestamp *t) { |
10717a1a LP |
3893 | unsigned long long a, b; |
3894 | ||
10717a1a LP |
3895 | assert(value); |
3896 | assert(t); | |
3897 | ||
3898 | if (sscanf(value, "%lli %llu", &a, &b) != 2) | |
3899 | log_debug("Failed to parse finish timestamp value %s", value); | |
3900 | else { | |
3901 | t->realtime = a; | |
3902 | t->monotonic = b; | |
3903 | } | |
3904 | } | |
3905 | ||
e23a0ce8 LP |
3906 | char *fstab_node_to_udev_node(const char *p) { |
3907 | char *dn, *t, *u; | |
3908 | int r; | |
3909 | ||
3910 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
3911 | * UTF8 chars unescaped */ | |
3912 | ||
3913 | if (startswith(p, "LABEL=")) { | |
3914 | ||
3915 | if (!(u = unquote(p+6, "\"\'"))) | |
3916 | return NULL; | |
3917 | ||
3918 | t = xescape(u, "/ "); | |
3919 | free(u); | |
3920 | ||
3921 | if (!t) | |
3922 | return NULL; | |
3923 | ||
3924 | r = asprintf(&dn, "/dev/disk/by-label/%s", t); | |
3925 | free(t); | |
3926 | ||
3927 | if (r < 0) | |
3928 | return NULL; | |
3929 | ||
3930 | return dn; | |
3931 | } | |
3932 | ||
3933 | if (startswith(p, "UUID=")) { | |
3934 | ||
3935 | if (!(u = unquote(p+5, "\"\'"))) | |
3936 | return NULL; | |
3937 | ||
3938 | t = xescape(u, "/ "); | |
3939 | free(u); | |
3940 | ||
3941 | if (!t) | |
3942 | return NULL; | |
3943 | ||
0058d7b9 | 3944 | r = asprintf(&dn, "/dev/disk/by-uuid/%s", t); |
e23a0ce8 LP |
3945 | free(t); |
3946 | ||
3947 | if (r < 0) | |
3948 | return NULL; | |
3949 | ||
3950 | return dn; | |
3951 | } | |
3952 | ||
3953 | return strdup(p); | |
3954 | } | |
3955 | ||
f212ac12 LP |
3956 | bool tty_is_vc(const char *tty) { |
3957 | assert(tty); | |
3958 | ||
3959 | if (startswith(tty, "/dev/")) | |
3960 | tty += 5; | |
3961 | ||
98a28fef LP |
3962 | return vtnr_from_tty(tty) >= 0; |
3963 | } | |
3964 | ||
d1122ad5 LP |
3965 | bool tty_is_console(const char *tty) { |
3966 | assert(tty); | |
3967 | ||
3968 | if (startswith(tty, "/dev/")) | |
3969 | tty += 5; | |
3970 | ||
3971 | return streq(tty, "console"); | |
3972 | } | |
3973 | ||
98a28fef LP |
3974 | int vtnr_from_tty(const char *tty) { |
3975 | int i, r; | |
3976 | ||
3977 | assert(tty); | |
3978 | ||
3979 | if (startswith(tty, "/dev/")) | |
3980 | tty += 5; | |
3981 | ||
3982 | if (!startswith(tty, "tty") ) | |
3983 | return -EINVAL; | |
3984 | ||
3985 | if (tty[3] < '0' || tty[3] > '9') | |
3986 | return -EINVAL; | |
3987 | ||
3988 | r = safe_atoi(tty+3, &i); | |
3989 | if (r < 0) | |
3990 | return r; | |
3991 | ||
3992 | if (i < 0 || i > 63) | |
3993 | return -EINVAL; | |
3994 | ||
3995 | return i; | |
f212ac12 LP |
3996 | } |
3997 | ||
3043935f | 3998 | bool tty_is_vc_resolve(const char *tty) { |
3030ccd7 | 3999 | char *active = NULL; |
3043935f | 4000 | bool b; |
3030ccd7 | 4001 | |
e3aa71c3 LP |
4002 | assert(tty); |
4003 | ||
4004 | if (startswith(tty, "/dev/")) | |
4005 | tty += 5; | |
4006 | ||
3d9a4122 LP |
4007 | /* Resolve where /dev/console is pointing to, if /sys is |
4008 | * actually ours (i.e. not read-only-mounted which is a sign | |
4009 | * for container setups) */ | |
4010 | if (streq(tty, "console") && path_is_read_only_fs("/sys") <= 0) | |
3030ccd7 | 4011 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { |
079a09fb LP |
4012 | /* If multiple log outputs are configured the |
4013 | * last one is what /dev/console points to */ | |
3043935f LP |
4014 | tty = strrchr(active, ' '); |
4015 | if (tty) | |
079a09fb LP |
4016 | tty++; |
4017 | else | |
4018 | tty = active; | |
3030ccd7 LP |
4019 | } |
4020 | ||
3043935f | 4021 | b = tty_is_vc(tty); |
3030ccd7 | 4022 | free(active); |
e3aa71c3 | 4023 | |
3043935f LP |
4024 | return b; |
4025 | } | |
4026 | ||
4027 | const char *default_term_for_tty(const char *tty) { | |
4028 | assert(tty); | |
4029 | ||
acda6a05 | 4030 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
4031 | } |
4032 | ||
87d2c1ff | 4033 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
4034 | assert(de); |
4035 | ||
4036 | if (ignore_file(de->d_name)) | |
4037 | return false; | |
4038 | ||
4039 | if (de->d_type != DT_REG && | |
4040 | de->d_type != DT_LNK && | |
4041 | de->d_type != DT_UNKNOWN) | |
4042 | return false; | |
4043 | ||
4044 | return true; | |
4045 | } | |
4046 | ||
87d2c1ff LP |
4047 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
4048 | assert(de); | |
4049 | ||
4050 | if (!dirent_is_file(de)) | |
4051 | return false; | |
4052 | ||
4053 | return endswith(de->d_name, suffix); | |
4054 | } | |
4055 | ||
83cc030f LP |
4056 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
4057 | DIR *_d = NULL; | |
4058 | struct dirent *de; | |
4059 | Hashmap *pids = NULL; | |
4060 | ||
4061 | assert(directory); | |
4062 | ||
4063 | /* Executes all binaries in a directory in parallel and waits | |
4064 | * until all they all finished. */ | |
4065 | ||
4066 | if (!d) { | |
4067 | if (!(_d = opendir(directory))) { | |
4068 | ||
4069 | if (errno == ENOENT) | |
4070 | return; | |
4071 | ||
4072 | log_error("Failed to enumerate directory %s: %m", directory); | |
4073 | return; | |
4074 | } | |
4075 | ||
4076 | d = _d; | |
4077 | } | |
4078 | ||
4079 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
4080 | log_error("Failed to allocate set."); | |
4081 | goto finish; | |
4082 | } | |
4083 | ||
4084 | while ((de = readdir(d))) { | |
4085 | char *path; | |
4086 | pid_t pid; | |
4087 | int k; | |
4088 | ||
fb19a739 | 4089 | if (!dirent_is_file(de)) |
83cc030f LP |
4090 | continue; |
4091 | ||
4092 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
4093 | log_error("Out of memory"); | |
4094 | continue; | |
4095 | } | |
4096 | ||
4097 | if ((pid = fork()) < 0) { | |
4098 | log_error("Failed to fork: %m"); | |
4099 | free(path); | |
4100 | continue; | |
4101 | } | |
4102 | ||
4103 | if (pid == 0) { | |
4104 | char *_argv[2]; | |
4105 | /* Child */ | |
4106 | ||
4107 | if (!argv) { | |
4108 | _argv[0] = path; | |
4109 | _argv[1] = NULL; | |
4110 | argv = _argv; | |
4111 | } else | |
6edd7d0a | 4112 | argv[0] = path; |
83cc030f LP |
4113 | |
4114 | execv(path, argv); | |
4115 | ||
4116 | log_error("Failed to execute %s: %m", path); | |
4117 | _exit(EXIT_FAILURE); | |
4118 | } | |
4119 | ||
4120 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
4121 | ||
4122 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
4123 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
4124 | free(path); | |
4125 | } | |
4126 | } | |
4127 | ||
4128 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 4129 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
83cc030f LP |
4130 | siginfo_t si; |
4131 | char *path; | |
4132 | ||
4133 | zero(si); | |
ec3f9b53 | 4134 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
4135 | |
4136 | if (errno == EINTR) | |
4137 | continue; | |
4138 | ||
4139 | log_error("waitid() failed: %m"); | |
4140 | goto finish; | |
4141 | } | |
4142 | ||
4143 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
4144 | if (!is_clean_exit(si.si_code, si.si_status)) { | |
4145 | if (si.si_code == CLD_EXITED) | |
4146 | log_error("%s exited with exit status %i.", path, si.si_status); | |
4147 | else | |
4148 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
4149 | } else | |
4150 | log_debug("%s exited successfully.", path); | |
4151 | ||
4152 | free(path); | |
4153 | } | |
4154 | } | |
4155 | ||
4156 | finish: | |
4157 | if (_d) | |
4158 | closedir(_d); | |
4159 | ||
4160 | if (pids) | |
4161 | hashmap_free_free(pids); | |
4162 | } | |
4163 | ||
430c18ed LP |
4164 | int kill_and_sigcont(pid_t pid, int sig) { |
4165 | int r; | |
4166 | ||
4167 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4168 | ||
4169 | if (r >= 0) | |
4170 | kill(pid, SIGCONT); | |
4171 | ||
4172 | return r; | |
4173 | } | |
4174 | ||
05feefe0 LP |
4175 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4176 | const char *i; | |
4177 | ||
4178 | if (!nulstr) | |
4179 | return false; | |
4180 | ||
4181 | NULSTR_FOREACH(i, nulstr) | |
4182 | if (streq(i, needle)) | |
4183 | return true; | |
4184 | ||
4185 | return false; | |
4186 | } | |
4187 | ||
6faa1114 | 4188 | bool plymouth_running(void) { |
9408a2d2 | 4189 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4190 | } |
4191 | ||
7c3b203c LP |
4192 | void parse_syslog_priority(char **p, int *priority) { |
4193 | int a = 0, b = 0, c = 0; | |
4194 | int k; | |
4195 | ||
4196 | assert(p); | |
4197 | assert(*p); | |
4198 | assert(priority); | |
4199 | ||
4200 | if ((*p)[0] != '<') | |
4201 | return; | |
4202 | ||
4203 | if (!strchr(*p, '>')) | |
4204 | return; | |
4205 | ||
4206 | if ((*p)[2] == '>') { | |
4207 | c = undecchar((*p)[1]); | |
4208 | k = 3; | |
4209 | } else if ((*p)[3] == '>') { | |
4210 | b = undecchar((*p)[1]); | |
4211 | c = undecchar((*p)[2]); | |
4212 | k = 4; | |
4213 | } else if ((*p)[4] == '>') { | |
4214 | a = undecchar((*p)[1]); | |
4215 | b = undecchar((*p)[2]); | |
4216 | c = undecchar((*p)[3]); | |
4217 | k = 5; | |
4218 | } else | |
4219 | return; | |
4220 | ||
4221 | if (a < 0 || b < 0 || c < 0) | |
4222 | return; | |
4223 | ||
4224 | *priority = a*100+b*10+c; | |
4225 | *p += k; | |
4226 | } | |
4227 | ||
87d2c1ff LP |
4228 | void skip_syslog_pid(char **buf) { |
4229 | char *p; | |
4230 | ||
4231 | assert(buf); | |
4232 | assert(*buf); | |
4233 | ||
4234 | p = *buf; | |
4235 | ||
4236 | if (*p != '[') | |
4237 | return; | |
4238 | ||
4239 | p++; | |
4240 | p += strspn(p, "0123456789"); | |
4241 | ||
4242 | if (*p != ']') | |
4243 | return; | |
4244 | ||
4245 | p++; | |
4246 | ||
4247 | *buf = p; | |
4248 | } | |
4249 | ||
4250 | void skip_syslog_date(char **buf) { | |
4251 | enum { | |
4252 | LETTER, | |
4253 | SPACE, | |
4254 | NUMBER, | |
4255 | SPACE_OR_NUMBER, | |
4256 | COLON | |
4257 | } sequence[] = { | |
4258 | LETTER, LETTER, LETTER, | |
4259 | SPACE, | |
4260 | SPACE_OR_NUMBER, NUMBER, | |
4261 | SPACE, | |
4262 | SPACE_OR_NUMBER, NUMBER, | |
4263 | COLON, | |
4264 | SPACE_OR_NUMBER, NUMBER, | |
4265 | COLON, | |
4266 | SPACE_OR_NUMBER, NUMBER, | |
4267 | SPACE | |
4268 | }; | |
4269 | ||
4270 | char *p; | |
4271 | unsigned i; | |
4272 | ||
4273 | assert(buf); | |
4274 | assert(*buf); | |
4275 | ||
4276 | p = *buf; | |
4277 | ||
4278 | for (i = 0; i < ELEMENTSOF(sequence); i++, p++) { | |
4279 | ||
4280 | if (!*p) | |
4281 | return; | |
4282 | ||
4283 | switch (sequence[i]) { | |
4284 | ||
4285 | case SPACE: | |
4286 | if (*p != ' ') | |
4287 | return; | |
4288 | break; | |
4289 | ||
4290 | case SPACE_OR_NUMBER: | |
4291 | if (*p == ' ') | |
4292 | break; | |
4293 | ||
4294 | /* fall through */ | |
4295 | ||
4296 | case NUMBER: | |
4297 | if (*p < '0' || *p > '9') | |
4298 | return; | |
4299 | ||
4300 | break; | |
4301 | ||
4302 | case LETTER: | |
4303 | if (!(*p >= 'A' && *p <= 'Z') && | |
4304 | !(*p >= 'a' && *p <= 'z')) | |
4305 | return; | |
4306 | ||
4307 | break; | |
4308 | ||
4309 | case COLON: | |
4310 | if (*p != ':') | |
4311 | return; | |
4312 | break; | |
4313 | ||
4314 | } | |
4315 | } | |
4316 | ||
4317 | *buf = p; | |
4318 | } | |
4319 | ||
9beb3f4d LP |
4320 | char* strshorten(char *s, size_t l) { |
4321 | assert(s); | |
4322 | ||
4323 | if (l < strlen(s)) | |
4324 | s[l] = 0; | |
4325 | ||
4326 | return s; | |
4327 | } | |
4328 | ||
4329 | static bool hostname_valid_char(char c) { | |
4330 | return | |
4331 | (c >= 'a' && c <= 'z') || | |
4332 | (c >= 'A' && c <= 'Z') || | |
4333 | (c >= '0' && c <= '9') || | |
4334 | c == '-' || | |
4335 | c == '_' || | |
4336 | c == '.'; | |
4337 | } | |
4338 | ||
4339 | bool hostname_is_valid(const char *s) { | |
4340 | const char *p; | |
4341 | ||
4342 | if (isempty(s)) | |
4343 | return false; | |
4344 | ||
4345 | for (p = s; *p; p++) | |
4346 | if (!hostname_valid_char(*p)) | |
4347 | return false; | |
4348 | ||
4349 | if (p-s > HOST_NAME_MAX) | |
4350 | return false; | |
4351 | ||
4352 | return true; | |
4353 | } | |
4354 | ||
4355 | char* hostname_cleanup(char *s) { | |
4356 | char *p, *d; | |
4357 | ||
4358 | for (p = s, d = s; *p; p++) | |
4359 | if ((*p >= 'a' && *p <= 'z') || | |
4360 | (*p >= 'A' && *p <= 'Z') || | |
4361 | (*p >= '0' && *p <= '9') || | |
4362 | *p == '-' || | |
4363 | *p == '_' || | |
4364 | *p == '.') | |
4365 | *(d++) = *p; | |
4366 | ||
4367 | *d = 0; | |
4368 | ||
4369 | strshorten(s, HOST_NAME_MAX); | |
4370 | return s; | |
4371 | } | |
4372 | ||
1325aa42 LP |
4373 | int pipe_eof(int fd) { |
4374 | struct pollfd pollfd; | |
4375 | int r; | |
4376 | ||
4377 | zero(pollfd); | |
4378 | pollfd.fd = fd; | |
4379 | pollfd.events = POLLIN|POLLHUP; | |
4380 | ||
4381 | r = poll(&pollfd, 1, 0); | |
4382 | if (r < 0) | |
4383 | return -errno; | |
4384 | ||
4385 | if (r == 0) | |
4386 | return 0; | |
4387 | ||
4388 | return pollfd.revents & POLLHUP; | |
4389 | } | |
4390 | ||
8f2d43a0 | 4391 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b LP |
4392 | struct pollfd pollfd; |
4393 | int r; | |
4394 | ||
4395 | zero(pollfd); | |
4396 | pollfd.fd = fd; | |
4397 | pollfd.events = event; | |
4398 | ||
8f2d43a0 | 4399 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
4400 | if (r < 0) |
4401 | return -errno; | |
4402 | ||
4403 | if (r == 0) | |
4404 | return 0; | |
4405 | ||
4406 | return pollfd.revents; | |
4407 | } | |
4408 | ||
5a3ab509 LP |
4409 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4410 | FILE *f; | |
4411 | char *t; | |
4412 | const char *fn; | |
4413 | size_t k; | |
4414 | int fd; | |
4415 | ||
4416 | assert(path); | |
4417 | assert(_f); | |
4418 | assert(_temp_path); | |
4419 | ||
4420 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4421 | if (!t) | |
4422 | return -ENOMEM; | |
4423 | ||
9eb977db | 4424 | fn = path_get_file_name(path); |
5a3ab509 LP |
4425 | k = fn-path; |
4426 | memcpy(t, path, k); | |
4427 | t[k] = '.'; | |
4428 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4429 | ||
4430 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4431 | if (fd < 0) { | |
4432 | free(t); | |
4433 | return -errno; | |
4434 | } | |
4435 | ||
4436 | f = fdopen(fd, "we"); | |
4437 | if (!f) { | |
4438 | unlink(t); | |
4439 | free(t); | |
4440 | return -errno; | |
4441 | } | |
4442 | ||
4443 | *_f = f; | |
4444 | *_temp_path = t; | |
4445 | ||
4446 | return 0; | |
4447 | } | |
4448 | ||
6ea832a2 | 4449 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4450 | assert(fd >= 0); |
4451 | ||
6ea832a2 LP |
4452 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4453 | return -errno; | |
4454 | ||
4455 | return 0; | |
4456 | } | |
4457 | ||
4458 | int terminal_vhangup(const char *name) { | |
4459 | int fd, r; | |
4460 | ||
4461 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4462 | if (fd < 0) | |
4463 | return fd; | |
4464 | ||
4465 | r = terminal_vhangup_fd(fd); | |
4466 | close_nointr_nofail(fd); | |
4467 | ||
4468 | return r; | |
4469 | } | |
4470 | ||
4471 | int vt_disallocate(const char *name) { | |
4472 | int fd, r; | |
4473 | unsigned u; | |
6ea832a2 LP |
4474 | |
4475 | /* Deallocate the VT if possible. If not possible | |
4476 | * (i.e. because it is the active one), at least clear it | |
4477 | * entirely (including the scrollback buffer) */ | |
4478 | ||
b83bc4e9 LP |
4479 | if (!startswith(name, "/dev/")) |
4480 | return -EINVAL; | |
4481 | ||
4482 | if (!tty_is_vc(name)) { | |
4483 | /* So this is not a VT. I guess we cannot deallocate | |
4484 | * it then. But let's at least clear the screen */ | |
4485 | ||
4486 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4487 | if (fd < 0) | |
4488 | return fd; | |
4489 | ||
8585357a LP |
4490 | loop_write(fd, |
4491 | "\033[r" /* clear scrolling region */ | |
4492 | "\033[H" /* move home */ | |
4493 | "\033[2J", /* clear screen */ | |
4494 | 10, false); | |
b83bc4e9 LP |
4495 | close_nointr_nofail(fd); |
4496 | ||
4497 | return 0; | |
4498 | } | |
6ea832a2 LP |
4499 | |
4500 | if (!startswith(name, "/dev/tty")) | |
4501 | return -EINVAL; | |
4502 | ||
4503 | r = safe_atou(name+8, &u); | |
4504 | if (r < 0) | |
4505 | return r; | |
4506 | ||
4507 | if (u <= 0) | |
b83bc4e9 | 4508 | return -EINVAL; |
6ea832a2 | 4509 | |
b83bc4e9 | 4510 | /* Try to deallocate */ |
6ea832a2 LP |
4511 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4512 | if (fd < 0) | |
4513 | return fd; | |
4514 | ||
4515 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4516 | close_nointr_nofail(fd); |
6ea832a2 | 4517 | |
b83bc4e9 LP |
4518 | if (r >= 0) |
4519 | return 0; | |
6ea832a2 | 4520 | |
b83bc4e9 | 4521 | if (errno != EBUSY) |
6ea832a2 | 4522 | return -errno; |
6ea832a2 | 4523 | |
b83bc4e9 LP |
4524 | /* Couldn't deallocate, so let's clear it fully with |
4525 | * scrollback */ | |
4526 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4527 | if (fd < 0) |
b83bc4e9 | 4528 | return fd; |
6ea832a2 | 4529 | |
8585357a LP |
4530 | loop_write(fd, |
4531 | "\033[r" /* clear scrolling region */ | |
4532 | "\033[H" /* move home */ | |
4533 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4534 | 10, false); | |
b83bc4e9 | 4535 | close_nointr_nofail(fd); |
6ea832a2 | 4536 | |
b83bc4e9 | 4537 | return 0; |
6ea832a2 LP |
4538 | } |
4539 | ||
34ca941c LP |
4540 | int copy_file(const char *from, const char *to) { |
4541 | int r, fdf, fdt; | |
4542 | ||
4543 | assert(from); | |
4544 | assert(to); | |
4545 | ||
4546 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4547 | if (fdf < 0) | |
4548 | return -errno; | |
4549 | ||
4550 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
4551 | if (fdt < 0) { | |
4552 | close_nointr_nofail(fdf); | |
4553 | return -errno; | |
4554 | } | |
4555 | ||
4556 | for (;;) { | |
4557 | char buf[PIPE_BUF]; | |
4558 | ssize_t n, k; | |
4559 | ||
4560 | n = read(fdf, buf, sizeof(buf)); | |
4561 | if (n < 0) { | |
4562 | r = -errno; | |
4563 | ||
4564 | close_nointr_nofail(fdf); | |
4565 | close_nointr(fdt); | |
4566 | unlink(to); | |
4567 | ||
4568 | return r; | |
4569 | } | |
4570 | ||
4571 | if (n == 0) | |
4572 | break; | |
4573 | ||
4574 | errno = 0; | |
4575 | k = loop_write(fdt, buf, n, false); | |
4576 | if (n != k) { | |
4577 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4578 | ||
4579 | close_nointr_nofail(fdf); | |
4580 | close_nointr(fdt); | |
4581 | ||
4582 | unlink(to); | |
4583 | return r; | |
4584 | } | |
4585 | } | |
4586 | ||
4587 | close_nointr_nofail(fdf); | |
4588 | r = close_nointr(fdt); | |
4589 | ||
4590 | if (r < 0) { | |
4591 | unlink(to); | |
4592 | return r; | |
4593 | } | |
4594 | ||
4595 | return 0; | |
4596 | } | |
4597 | ||
4598 | int symlink_or_copy(const char *from, const char *to) { | |
4599 | char *pf = NULL, *pt = NULL; | |
4600 | struct stat a, b; | |
4601 | int r; | |
4602 | ||
4603 | assert(from); | |
4604 | assert(to); | |
4605 | ||
9eb977db KS |
4606 | if (path_get_parent(from, &pf) < 0 || |
4607 | path_get_parent(to, &pt) < 0) { | |
34ca941c LP |
4608 | r = -ENOMEM; |
4609 | goto finish; | |
4610 | } | |
4611 | ||
4612 | if (stat(pf, &a) < 0 || | |
4613 | stat(pt, &b) < 0) { | |
4614 | r = -errno; | |
4615 | goto finish; | |
4616 | } | |
4617 | ||
4618 | if (a.st_dev != b.st_dev) { | |
4619 | free(pf); | |
4620 | free(pt); | |
4621 | ||
4622 | return copy_file(from, to); | |
4623 | } | |
4624 | ||
4625 | if (symlink(from, to) < 0) { | |
4626 | r = -errno; | |
4627 | goto finish; | |
4628 | } | |
4629 | ||
4630 | r = 0; | |
4631 | ||
4632 | finish: | |
4633 | free(pf); | |
4634 | free(pt); | |
4635 | ||
4636 | return r; | |
4637 | } | |
4638 | ||
4639 | int symlink_or_copy_atomic(const char *from, const char *to) { | |
4640 | char *t, *x; | |
4641 | const char *fn; | |
4642 | size_t k; | |
4643 | unsigned long long ull; | |
4644 | unsigned i; | |
4645 | int r; | |
4646 | ||
4647 | assert(from); | |
4648 | assert(to); | |
4649 | ||
4650 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4651 | if (!t) | |
4652 | return -ENOMEM; | |
4653 | ||
9eb977db | 4654 | fn = path_get_file_name(to); |
34ca941c LP |
4655 | k = fn-to; |
4656 | memcpy(t, to, k); | |
4657 | t[k] = '.'; | |
4658 | x = stpcpy(t+k+1, fn); | |
4659 | ||
4660 | ull = random_ull(); | |
4661 | for (i = 0; i < 16; i++) { | |
4662 | *(x++) = hexchar(ull & 0xF); | |
4663 | ull >>= 4; | |
4664 | } | |
4665 | ||
4666 | *x = 0; | |
4667 | ||
4668 | r = symlink_or_copy(from, t); | |
4669 | if (r < 0) { | |
4670 | unlink(t); | |
4671 | free(t); | |
4672 | return r; | |
4673 | } | |
4674 | ||
4675 | if (rename(t, to) < 0) { | |
4676 | r = -errno; | |
4677 | unlink(t); | |
4678 | free(t); | |
4679 | return r; | |
4680 | } | |
4681 | ||
4682 | free(t); | |
4683 | return r; | |
4684 | } | |
4685 | ||
4d6d6518 LP |
4686 | bool display_is_local(const char *display) { |
4687 | assert(display); | |
4688 | ||
4689 | return | |
4690 | display[0] == ':' && | |
4691 | display[1] >= '0' && | |
4692 | display[1] <= '9'; | |
4693 | } | |
4694 | ||
4695 | int socket_from_display(const char *display, char **path) { | |
4696 | size_t k; | |
4697 | char *f, *c; | |
4698 | ||
4699 | assert(display); | |
4700 | assert(path); | |
4701 | ||
4702 | if (!display_is_local(display)) | |
4703 | return -EINVAL; | |
4704 | ||
4705 | k = strspn(display+1, "0123456789"); | |
4706 | ||
4707 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4708 | if (!f) | |
4709 | return -ENOMEM; | |
4710 | ||
4711 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4712 | memcpy(c, display+1, k); | |
4713 | c[k] = 0; | |
4714 | ||
4715 | *path = f; | |
4716 | ||
4717 | return 0; | |
4718 | } | |
4719 | ||
1cccf435 MV |
4720 | int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home) { |
4721 | struct passwd *p; | |
ddd88763 | 4722 | uid_t u; |
1cccf435 MV |
4723 | |
4724 | assert(username); | |
4725 | assert(*username); | |
1cccf435 MV |
4726 | |
4727 | /* We enforce some special rules for uid=0: in order to avoid | |
4728 | * NSS lookups for root we hardcode its data. */ | |
4729 | ||
4730 | if (streq(*username, "root") || streq(*username, "0")) { | |
4731 | *username = "root"; | |
4b67834e LP |
4732 | |
4733 | if (uid) | |
4734 | *uid = 0; | |
4735 | ||
4736 | if (gid) | |
4737 | *gid = 0; | |
4738 | ||
4739 | if (home) | |
4740 | *home = "/root"; | |
1cccf435 MV |
4741 | return 0; |
4742 | } | |
4743 | ||
ddd88763 | 4744 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4745 | errno = 0; |
ddd88763 | 4746 | p = getpwuid(u); |
1cccf435 MV |
4747 | |
4748 | /* If there are multiple users with the same id, make | |
4749 | * sure to leave $USER to the configured value instead | |
4750 | * of the first occurrence in the database. However if | |
4751 | * the uid was configured by a numeric uid, then let's | |
4752 | * pick the real username from /etc/passwd. */ | |
4753 | if (p) | |
4754 | *username = p->pw_name; | |
4755 | } else { | |
4756 | errno = 0; | |
4757 | p = getpwnam(*username); | |
4758 | } | |
4759 | ||
4760 | if (!p) | |
4761 | return errno != 0 ? -errno : -ESRCH; | |
4762 | ||
4b67834e LP |
4763 | if (uid) |
4764 | *uid = p->pw_uid; | |
4765 | ||
4766 | if (gid) | |
4767 | *gid = p->pw_gid; | |
4768 | ||
4769 | if (home) | |
4770 | *home = p->pw_dir; | |
4771 | ||
4772 | return 0; | |
4773 | } | |
4774 | ||
4775 | int get_group_creds(const char **groupname, gid_t *gid) { | |
4776 | struct group *g; | |
4777 | gid_t id; | |
4778 | ||
4779 | assert(groupname); | |
4780 | ||
4781 | /* We enforce some special rules for gid=0: in order to avoid | |
4782 | * NSS lookups for root we hardcode its data. */ | |
4783 | ||
4784 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4785 | *groupname = "root"; | |
4786 | ||
4787 | if (gid) | |
4788 | *gid = 0; | |
4789 | ||
4790 | return 0; | |
4791 | } | |
4792 | ||
4793 | if (parse_gid(*groupname, &id) >= 0) { | |
4794 | errno = 0; | |
4795 | g = getgrgid(id); | |
4796 | ||
4797 | if (g) | |
4798 | *groupname = g->gr_name; | |
4799 | } else { | |
4800 | errno = 0; | |
4801 | g = getgrnam(*groupname); | |
4802 | } | |
4803 | ||
4804 | if (!g) | |
4805 | return errno != 0 ? -errno : -ESRCH; | |
4806 | ||
4807 | if (gid) | |
4808 | *gid = g->gr_gid; | |
4809 | ||
1cccf435 MV |
4810 | return 0; |
4811 | } | |
4812 | ||
43673799 LP |
4813 | int in_group(const char *name) { |
4814 | gid_t gid, *gids; | |
4815 | int ngroups_max, r, i; | |
4816 | ||
4817 | r = get_group_creds(&name, &gid); | |
4818 | if (r < 0) | |
4819 | return r; | |
4820 | ||
4821 | if (getgid() == gid) | |
4822 | return 1; | |
4823 | ||
4824 | if (getegid() == gid) | |
4825 | return 1; | |
4826 | ||
4827 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4828 | assert(ngroups_max > 0); | |
4829 | ||
4830 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4831 | ||
4832 | r = getgroups(ngroups_max, gids); | |
4833 | if (r < 0) | |
4834 | return -errno; | |
4835 | ||
4836 | for (i = 0; i < r; i++) | |
4837 | if (gids[i] == gid) | |
4838 | return 1; | |
4839 | ||
4840 | return 0; | |
4841 | } | |
4842 | ||
8092a428 LP |
4843 | int glob_exists(const char *path) { |
4844 | glob_t g; | |
4845 | int r, k; | |
4846 | ||
4847 | assert(path); | |
4848 | ||
4849 | zero(g); | |
4850 | errno = 0; | |
4851 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4852 | ||
4853 | if (k == GLOB_NOMATCH) | |
4854 | r = 0; | |
4855 | else if (k == GLOB_NOSPACE) | |
4856 | r = -ENOMEM; | |
4857 | else if (k == 0) | |
4858 | r = !strv_isempty(g.gl_pathv); | |
4859 | else | |
4860 | r = errno ? -errno : -EIO; | |
4861 | ||
4862 | globfree(&g); | |
4863 | ||
4864 | return r; | |
4865 | } | |
4866 | ||
83096483 LP |
4867 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4868 | struct stat st; | |
4869 | ||
4870 | assert(d); | |
4871 | assert(de); | |
4872 | ||
4873 | if (de->d_type != DT_UNKNOWN) | |
4874 | return 0; | |
4875 | ||
4876 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4877 | return -errno; | |
4878 | ||
4879 | de->d_type = | |
4880 | S_ISREG(st.st_mode) ? DT_REG : | |
4881 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4882 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4883 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4884 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4885 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4886 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4887 | DT_UNKNOWN; | |
4888 | ||
4889 | return 0; | |
4890 | } | |
4891 | ||
4892 | int in_search_path(const char *path, char **search) { | |
4893 | char **i, *parent; | |
4894 | int r; | |
4895 | ||
9eb977db | 4896 | r = path_get_parent(path, &parent); |
83096483 LP |
4897 | if (r < 0) |
4898 | return r; | |
4899 | ||
4900 | r = 0; | |
4901 | ||
4902 | STRV_FOREACH(i, search) { | |
4903 | if (path_equal(parent, *i)) { | |
4904 | r = 1; | |
4905 | break; | |
4906 | } | |
4907 | } | |
4908 | ||
4909 | free(parent); | |
4910 | ||
4911 | return r; | |
4912 | } | |
4913 | ||
034a2a52 LP |
4914 | int get_files_in_directory(const char *path, char ***list) { |
4915 | DIR *d; | |
4916 | int r = 0; | |
4917 | unsigned n = 0; | |
4918 | char **l = NULL; | |
4919 | ||
4920 | assert(path); | |
d60ef526 LP |
4921 | |
4922 | /* Returns all files in a directory in *list, and the number | |
4923 | * of files as return value. If list is NULL returns only the | |
4924 | * number */ | |
034a2a52 LP |
4925 | |
4926 | d = opendir(path); | |
8ea913b2 LP |
4927 | if (!d) |
4928 | return -errno; | |
4929 | ||
034a2a52 LP |
4930 | for (;;) { |
4931 | struct dirent buffer, *de; | |
4932 | int k; | |
4933 | ||
4934 | k = readdir_r(d, &buffer, &de); | |
4935 | if (k != 0) { | |
4936 | r = -k; | |
4937 | goto finish; | |
4938 | } | |
4939 | ||
4940 | if (!de) | |
4941 | break; | |
4942 | ||
4943 | dirent_ensure_type(d, de); | |
4944 | ||
4945 | if (!dirent_is_file(de)) | |
4946 | continue; | |
4947 | ||
d60ef526 LP |
4948 | if (list) { |
4949 | if ((unsigned) r >= n) { | |
4950 | char **t; | |
034a2a52 | 4951 | |
d60ef526 LP |
4952 | n = MAX(16, 2*r); |
4953 | t = realloc(l, sizeof(char*) * n); | |
4954 | if (!t) { | |
4955 | r = -ENOMEM; | |
4956 | goto finish; | |
4957 | } | |
034a2a52 | 4958 | |
d60ef526 LP |
4959 | l = t; |
4960 | } | |
034a2a52 | 4961 | |
d60ef526 | 4962 | assert((unsigned) r < n); |
034a2a52 | 4963 | |
d60ef526 LP |
4964 | l[r] = strdup(de->d_name); |
4965 | if (!l[r]) { | |
4966 | r = -ENOMEM; | |
4967 | goto finish; | |
4968 | } | |
034a2a52 | 4969 | |
d60ef526 LP |
4970 | l[++r] = NULL; |
4971 | } else | |
4972 | r++; | |
034a2a52 LP |
4973 | } |
4974 | ||
4975 | finish: | |
4976 | if (d) | |
4977 | closedir(d); | |
4978 | ||
d60ef526 LP |
4979 | if (r >= 0) { |
4980 | if (list) | |
4981 | *list = l; | |
4982 | } else | |
034a2a52 LP |
4983 | strv_free(l); |
4984 | ||
4985 | return r; | |
4986 | } | |
4987 | ||
911a4828 LP |
4988 | char *join(const char *x, ...) { |
4989 | va_list ap; | |
4990 | size_t l; | |
4991 | char *r, *p; | |
4992 | ||
4993 | va_start(ap, x); | |
4994 | ||
4995 | if (x) { | |
4996 | l = strlen(x); | |
4997 | ||
4998 | for (;;) { | |
4999 | const char *t; | |
5000 | ||
5001 | t = va_arg(ap, const char *); | |
5002 | if (!t) | |
5003 | break; | |
5004 | ||
5005 | l += strlen(t); | |
5006 | } | |
5007 | } else | |
5008 | l = 0; | |
5009 | ||
5010 | va_end(ap); | |
5011 | ||
5012 | r = new(char, l+1); | |
5013 | if (!r) | |
5014 | return NULL; | |
5015 | ||
5016 | if (x) { | |
5017 | p = stpcpy(r, x); | |
5018 | ||
5019 | va_start(ap, x); | |
5020 | ||
5021 | for (;;) { | |
5022 | const char *t; | |
5023 | ||
5024 | t = va_arg(ap, const char *); | |
5025 | if (!t) | |
5026 | break; | |
5027 | ||
5028 | p = stpcpy(p, t); | |
5029 | } | |
8ea913b2 LP |
5030 | |
5031 | va_end(ap); | |
911a4828 LP |
5032 | } else |
5033 | r[0] = 0; | |
5034 | ||
5035 | return r; | |
5036 | } | |
5037 | ||
b636465b LP |
5038 | bool is_main_thread(void) { |
5039 | static __thread int cached = 0; | |
5040 | ||
5041 | if (_unlikely_(cached == 0)) | |
5042 | cached = getpid() == gettid() ? 1 : -1; | |
5043 | ||
5044 | return cached > 0; | |
5045 | } | |
5046 | ||
94959f0f LP |
5047 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
5048 | char *p, *s; | |
5049 | int r; | |
5050 | unsigned n, m; | |
5051 | ||
5052 | assert(ret); | |
5053 | ||
5054 | /* If it has a queue this is good enough for us */ | |
5055 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
5056 | return -ENOMEM; | |
5057 | ||
5058 | r = access(p, F_OK); | |
5059 | free(p); | |
5060 | ||
5061 | if (r >= 0) { | |
5062 | *ret = d; | |
5063 | return 0; | |
5064 | } | |
5065 | ||
5066 | /* If it is a partition find the originating device */ | |
5067 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
5068 | return -ENOMEM; | |
5069 | ||
5070 | r = access(p, F_OK); | |
5071 | free(p); | |
5072 | ||
5073 | if (r < 0) | |
5074 | return -ENOENT; | |
5075 | ||
5076 | /* Get parent dev_t */ | |
5077 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
5078 | return -ENOMEM; | |
5079 | ||
5080 | r = read_one_line_file(p, &s); | |
5081 | free(p); | |
5082 | ||
5083 | if (r < 0) | |
5084 | return r; | |
5085 | ||
5086 | r = sscanf(s, "%u:%u", &m, &n); | |
5087 | free(s); | |
5088 | ||
5089 | if (r != 2) | |
5090 | return -EINVAL; | |
5091 | ||
5092 | /* Only return this if it is really good enough for us. */ | |
5093 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
5094 | return -ENOMEM; | |
5095 | ||
5096 | r = access(p, F_OK); | |
5097 | free(p); | |
5098 | ||
5099 | if (r >= 0) { | |
5100 | *ret = makedev(m, n); | |
5101 | return 0; | |
5102 | } | |
5103 | ||
5104 | return -ENOENT; | |
5105 | } | |
5106 | ||
8d53b453 | 5107 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
5108 | struct stat st; |
5109 | ||
5110 | assert(p); | |
5111 | ||
5112 | if (lstat(p, &st) < 0) | |
5113 | return -errno; | |
5114 | ||
5115 | return | |
8d53b453 | 5116 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
5117 | (st.st_mode & S_ISVTX); |
5118 | } | |
94959f0f | 5119 | |
f41607a6 LP |
5120 | static const char *const ioprio_class_table[] = { |
5121 | [IOPRIO_CLASS_NONE] = "none", | |
5122 | [IOPRIO_CLASS_RT] = "realtime", | |
5123 | [IOPRIO_CLASS_BE] = "best-effort", | |
5124 | [IOPRIO_CLASS_IDLE] = "idle" | |
5125 | }; | |
5126 | ||
5127 | DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int); | |
5128 | ||
5129 | static const char *const sigchld_code_table[] = { | |
5130 | [CLD_EXITED] = "exited", | |
5131 | [CLD_KILLED] = "killed", | |
5132 | [CLD_DUMPED] = "dumped", | |
5133 | [CLD_TRAPPED] = "trapped", | |
5134 | [CLD_STOPPED] = "stopped", | |
5135 | [CLD_CONTINUED] = "continued", | |
5136 | }; | |
5137 | ||
5138 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
5139 | ||
5140 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
5141 | [LOG_FAC(LOG_KERN)] = "kern", | |
5142 | [LOG_FAC(LOG_USER)] = "user", | |
5143 | [LOG_FAC(LOG_MAIL)] = "mail", | |
5144 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
5145 | [LOG_FAC(LOG_AUTH)] = "auth", | |
5146 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
5147 | [LOG_FAC(LOG_LPR)] = "lpr", | |
5148 | [LOG_FAC(LOG_NEWS)] = "news", | |
5149 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
5150 | [LOG_FAC(LOG_CRON)] = "cron", | |
5151 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
5152 | [LOG_FAC(LOG_FTP)] = "ftp", | |
5153 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
5154 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
5155 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
5156 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
5157 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
5158 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
5159 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
5160 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
5161 | }; | |
5162 | ||
5163 | DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int); | |
5164 | ||
5165 | static const char *const log_level_table[] = { | |
5166 | [LOG_EMERG] = "emerg", | |
5167 | [LOG_ALERT] = "alert", | |
5168 | [LOG_CRIT] = "crit", | |
5169 | [LOG_ERR] = "err", | |
5170 | [LOG_WARNING] = "warning", | |
5171 | [LOG_NOTICE] = "notice", | |
5172 | [LOG_INFO] = "info", | |
5173 | [LOG_DEBUG] = "debug" | |
5174 | }; | |
5175 | ||
5176 | DEFINE_STRING_TABLE_LOOKUP(log_level, int); | |
5177 | ||
5178 | static const char* const sched_policy_table[] = { | |
5179 | [SCHED_OTHER] = "other", | |
5180 | [SCHED_BATCH] = "batch", | |
5181 | [SCHED_IDLE] = "idle", | |
5182 | [SCHED_FIFO] = "fifo", | |
5183 | [SCHED_RR] = "rr" | |
5184 | }; | |
5185 | ||
5186 | DEFINE_STRING_TABLE_LOOKUP(sched_policy, int); | |
5187 | ||
5188 | static const char* const rlimit_table[] = { | |
5189 | [RLIMIT_CPU] = "LimitCPU", | |
5190 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
5191 | [RLIMIT_DATA] = "LimitDATA", | |
5192 | [RLIMIT_STACK] = "LimitSTACK", | |
5193 | [RLIMIT_CORE] = "LimitCORE", | |
5194 | [RLIMIT_RSS] = "LimitRSS", | |
5195 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
5196 | [RLIMIT_AS] = "LimitAS", | |
5197 | [RLIMIT_NPROC] = "LimitNPROC", | |
5198 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
5199 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
5200 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
5201 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
5202 | [RLIMIT_NICE] = "LimitNICE", | |
5203 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
5204 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
5205 | }; | |
5206 | ||
5207 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
5208 | ||
5209 | static const char* const ip_tos_table[] = { | |
5210 | [IPTOS_LOWDELAY] = "low-delay", | |
5211 | [IPTOS_THROUGHPUT] = "throughput", | |
5212 | [IPTOS_RELIABILITY] = "reliability", | |
5213 | [IPTOS_LOWCOST] = "low-cost", | |
5214 | }; | |
5215 | ||
5216 | DEFINE_STRING_TABLE_LOOKUP(ip_tos, int); | |
5217 | ||
4e240ab0 | 5218 | static const char *const __signal_table[] = { |
f41607a6 LP |
5219 | [SIGHUP] = "HUP", |
5220 | [SIGINT] = "INT", | |
5221 | [SIGQUIT] = "QUIT", | |
5222 | [SIGILL] = "ILL", | |
5223 | [SIGTRAP] = "TRAP", | |
5224 | [SIGABRT] = "ABRT", | |
5225 | [SIGBUS] = "BUS", | |
5226 | [SIGFPE] = "FPE", | |
5227 | [SIGKILL] = "KILL", | |
5228 | [SIGUSR1] = "USR1", | |
5229 | [SIGSEGV] = "SEGV", | |
5230 | [SIGUSR2] = "USR2", | |
5231 | [SIGPIPE] = "PIPE", | |
5232 | [SIGALRM] = "ALRM", | |
5233 | [SIGTERM] = "TERM", | |
5234 | #ifdef SIGSTKFLT | |
5235 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
5236 | #endif | |
5237 | [SIGCHLD] = "CHLD", | |
5238 | [SIGCONT] = "CONT", | |
5239 | [SIGSTOP] = "STOP", | |
5240 | [SIGTSTP] = "TSTP", | |
5241 | [SIGTTIN] = "TTIN", | |
5242 | [SIGTTOU] = "TTOU", | |
5243 | [SIGURG] = "URG", | |
5244 | [SIGXCPU] = "XCPU", | |
5245 | [SIGXFSZ] = "XFSZ", | |
5246 | [SIGVTALRM] = "VTALRM", | |
5247 | [SIGPROF] = "PROF", | |
5248 | [SIGWINCH] = "WINCH", | |
5249 | [SIGIO] = "IO", | |
5250 | [SIGPWR] = "PWR", | |
5251 | [SIGSYS] = "SYS" | |
5252 | }; | |
5253 | ||
4e240ab0 MS |
5254 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
5255 | ||
5256 | const char *signal_to_string(int signo) { | |
5257 | static __thread char buf[12]; | |
5258 | const char *name; | |
5259 | ||
5260 | name = __signal_to_string(signo); | |
5261 | if (name) | |
5262 | return name; | |
5263 | ||
5264 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
5265 | snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN); | |
5266 | else | |
5267 | snprintf(buf, sizeof(buf) - 1, "%d", signo); | |
5268 | char_array_0(buf); | |
5269 | return buf; | |
5270 | } | |
5271 | ||
5272 | int signal_from_string(const char *s) { | |
5273 | int signo; | |
5274 | int offset = 0; | |
5275 | unsigned u; | |
5276 | ||
5277 | signo =__signal_from_string(s); | |
5278 | if (signo > 0) | |
5279 | return signo; | |
5280 | ||
5281 | if (startswith(s, "RTMIN+")) { | |
5282 | s += 6; | |
5283 | offset = SIGRTMIN; | |
5284 | } | |
5285 | if (safe_atou(s, &u) >= 0) { | |
5286 | signo = (int) u + offset; | |
5287 | if (signo > 0 && signo < _NSIG) | |
5288 | return signo; | |
5289 | } | |
5290 | return -1; | |
5291 | } | |
65457142 FC |
5292 | |
5293 | bool kexec_loaded(void) { | |
5294 | bool loaded = false; | |
5295 | char *s; | |
5296 | ||
5297 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
5298 | if (s[0] == '1') | |
5299 | loaded = true; | |
5300 | free(s); | |
5301 | } | |
5302 | return loaded; | |
5303 | } | |
fb9de93d LP |
5304 | |
5305 | int strdup_or_null(const char *a, char **b) { | |
5306 | char *c; | |
5307 | ||
5308 | assert(b); | |
5309 | ||
5310 | if (!a) { | |
5311 | *b = NULL; | |
5312 | return 0; | |
5313 | } | |
5314 | ||
5315 | c = strdup(a); | |
5316 | if (!c) | |
5317 | return -ENOMEM; | |
5318 | ||
5319 | *b = c; | |
5320 | return 0; | |
5321 | } | |
64685e0c | 5322 | |
87d2c1ff LP |
5323 | int prot_from_flags(int flags) { |
5324 | ||
5325 | switch (flags & O_ACCMODE) { | |
5326 | ||
5327 | case O_RDONLY: | |
5328 | return PROT_READ; | |
5329 | ||
5330 | case O_WRONLY: | |
5331 | return PROT_WRITE; | |
5332 | ||
5333 | case O_RDWR: | |
5334 | return PROT_READ|PROT_WRITE; | |
5335 | ||
5336 | default: | |
5337 | return -EINVAL; | |
5338 | } | |
7c99e0c1 | 5339 | } |
689b9a22 | 5340 | |
babfc091 | 5341 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 5342 | unsigned i; |
babfc091 LP |
5343 | |
5344 | static const struct { | |
5345 | const char *suffix; | |
5346 | off_t factor; | |
5347 | } table[] = { | |
32895bb3 LP |
5348 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
5349 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
5350 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
5351 | { "G", 1024ULL*1024ULL*1024ULL }, | |
5352 | { "M", 1024ULL*1024ULL }, | |
5353 | { "K", 1024ULL }, | |
5354 | }; | |
5355 | ||
5356 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
5357 | ||
5358 | if (t >= table[i].factor) { | |
5359 | snprintf(buf, l, | |
5360 | "%llu.%llu%s", | |
5361 | (unsigned long long) (t / table[i].factor), | |
5362 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
5363 | table[i].suffix); | |
5364 | ||
5365 | goto finish; | |
5366 | } | |
5367 | } | |
5368 | ||
5369 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
5370 | ||
5371 | finish: | |
5372 | buf[l-1] = 0; | |
5373 | return buf; | |
5374 | ||
5375 | } | |
55d7bfc1 LP |
5376 | |
5377 | void* memdup(const void *p, size_t l) { | |
5378 | void *r; | |
5379 | ||
5380 | assert(p); | |
5381 | ||
5382 | r = malloc(l); | |
5383 | if (!r) | |
5384 | return NULL; | |
5385 | ||
5386 | memcpy(r, p, l); | |
5387 | return r; | |
5388 | } | |
bb99a35a LP |
5389 | |
5390 | int fd_inc_sndbuf(int fd, size_t n) { | |
5391 | int r, value; | |
5392 | socklen_t l = sizeof(value); | |
5393 | ||
5394 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
5395 | if (r >= 0 && | |
5396 | l == sizeof(value) && | |
5397 | (size_t) value >= n*2) | |
5398 | return 0; | |
5399 | ||
5400 | value = (int) n; | |
5401 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
5402 | if (r < 0) | |
5403 | return -errno; | |
5404 | ||
5405 | return 1; | |
5406 | } | |
5407 | ||
5408 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5409 | int r, value; | |
5410 | socklen_t l = sizeof(value); | |
5411 | ||
5412 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
5413 | if (r >= 0 && | |
5414 | l == sizeof(value) && | |
5415 | (size_t) value >= n*2) | |
5416 | return 0; | |
5417 | ||
5418 | value = (int) n; | |
5419 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
5420 | if (r < 0) | |
5421 | return -errno; | |
5422 | ||
5423 | return 1; | |
5424 | } | |
6bb92a16 | 5425 | |
9bdc770c | 5426 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
5427 | pid_t parent_pid, agent_pid; |
5428 | int fd; | |
5429 | bool stdout_is_tty, stderr_is_tty; | |
5430 | unsigned n, i; | |
5431 | va_list ap; | |
5432 | char **l; | |
5433 | ||
5434 | assert(pid); | |
5435 | assert(path); | |
5436 | ||
5437 | parent_pid = getpid(); | |
5438 | ||
5439 | /* Spawns a temporary TTY agent, making sure it goes away when | |
5440 | * we go away */ | |
5441 | ||
5442 | agent_pid = fork(); | |
5443 | if (agent_pid < 0) | |
5444 | return -errno; | |
5445 | ||
5446 | if (agent_pid != 0) { | |
5447 | *pid = agent_pid; | |
5448 | return 0; | |
5449 | } | |
5450 | ||
5451 | /* In the child: | |
5452 | * | |
5453 | * Make sure the agent goes away when the parent dies */ | |
5454 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5455 | _exit(EXIT_FAILURE); | |
5456 | ||
5457 | /* Check whether our parent died before we were able | |
5458 | * to set the death signal */ | |
5459 | if (getppid() != parent_pid) | |
5460 | _exit(EXIT_SUCCESS); | |
5461 | ||
5462 | /* Don't leak fds to the agent */ | |
9bdc770c | 5463 | close_all_fds(except, n_except); |
6bb92a16 LP |
5464 | |
5465 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5466 | stderr_is_tty = isatty(STDERR_FILENO); | |
5467 | ||
5468 | if (!stdout_is_tty || !stderr_is_tty) { | |
5469 | /* Detach from stdout/stderr. and reopen | |
5470 | * /dev/tty for them. This is important to | |
5471 | * ensure that when systemctl is started via | |
5472 | * popen() or a similar call that expects to | |
5473 | * read EOF we actually do generate EOF and | |
5474 | * not delay this indefinitely by because we | |
5475 | * keep an unused copy of stdin around. */ | |
5476 | fd = open("/dev/tty", O_WRONLY); | |
5477 | if (fd < 0) { | |
5478 | log_error("Failed to open /dev/tty: %m"); | |
5479 | _exit(EXIT_FAILURE); | |
5480 | } | |
5481 | ||
5482 | if (!stdout_is_tty) | |
5483 | dup2(fd, STDOUT_FILENO); | |
5484 | ||
5485 | if (!stderr_is_tty) | |
5486 | dup2(fd, STDERR_FILENO); | |
5487 | ||
5488 | if (fd > 2) | |
5489 | close(fd); | |
5490 | } | |
5491 | ||
5492 | /* Count arguments */ | |
5493 | va_start(ap, path); | |
5494 | for (n = 0; va_arg(ap, char*); n++) | |
5495 | ; | |
5496 | va_end(ap); | |
5497 | ||
5498 | /* Allocate strv */ | |
5499 | l = alloca(sizeof(char *) * (n + 1)); | |
5500 | ||
5501 | /* Fill in arguments */ | |
5502 | va_start(ap, path); | |
5503 | for (i = 0; i <= n; i++) | |
5504 | l[i] = va_arg(ap, char*); | |
5505 | va_end(ap); | |
5506 | ||
5507 | execv(path, l); | |
5508 | _exit(EXIT_FAILURE); | |
5509 | } | |
68faf98c LP |
5510 | |
5511 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5512 | struct rlimit highest, fixed; | |
5513 | ||
5514 | assert(rlim); | |
5515 | ||
5516 | if (setrlimit(resource, rlim) >= 0) | |
5517 | return 0; | |
5518 | ||
5519 | if (errno != EPERM) | |
5520 | return -errno; | |
5521 | ||
5522 | /* So we failed to set the desired setrlimit, then let's try | |
5523 | * to get as close as we can */ | |
5524 | assert_se(getrlimit(resource, &highest) == 0); | |
5525 | ||
5526 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5527 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5528 | ||
5529 | if (setrlimit(resource, &fixed) < 0) | |
5530 | return -errno; | |
5531 | ||
5532 | return 0; | |
5533 | } | |
3d9a4122 | 5534 | |
ab94af92 LP |
5535 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
5536 | char path[sizeof("/proc/")-1+10+sizeof("/environ")], *value = NULL; | |
5537 | int r; | |
5538 | FILE *f; | |
5539 | bool done = false; | |
5540 | size_t l; | |
5541 | ||
5542 | assert(field); | |
5543 | assert(_value); | |
5544 | ||
5545 | if (pid == 0) | |
5546 | pid = getpid(); | |
5547 | ||
5548 | snprintf(path, sizeof(path), "/proc/%lu/environ", (unsigned long) pid); | |
5549 | char_array_0(path); | |
5550 | ||
5551 | f = fopen(path, "re"); | |
5552 | if (!f) | |
5553 | return -errno; | |
5554 | ||
5555 | l = strlen(field); | |
5556 | r = 0; | |
5557 | ||
5558 | do { | |
5559 | char line[LINE_MAX]; | |
5560 | unsigned i; | |
5561 | ||
5562 | for (i = 0; i < sizeof(line)-1; i++) { | |
5563 | int c; | |
5564 | ||
5565 | c = getc(f); | |
5566 | if (_unlikely_(c == EOF)) { | |
5567 | done = true; | |
5568 | break; | |
5569 | } else if (c == 0) | |
5570 | break; | |
5571 | ||
5572 | line[i] = c; | |
5573 | } | |
5574 | line[i] = 0; | |
5575 | ||
5576 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5577 | value = strdup(line + l + 1); | |
5578 | if (!value) { | |
5579 | r = -ENOMEM; | |
5580 | break; | |
5581 | } | |
5582 | ||
5583 | r = 1; | |
5584 | break; | |
5585 | } | |
5586 | ||
5587 | } while (!done); | |
5588 | ||
5589 | fclose(f); | |
5590 | ||
5591 | if (r >= 0) | |
5592 | *_value = value; | |
5593 | ||
5594 | return r; | |
5595 | } | |
d889a206 LP |
5596 | |
5597 | int can_sleep(const char *type) { | |
5598 | char *p, *w, *state; | |
5599 | size_t l, k; | |
5600 | bool found = false; | |
5601 | int r; | |
5602 | ||
5603 | assert(type); | |
5604 | ||
5605 | r = read_one_line_file("/sys/power/state", &p); | |
5606 | if (r < 0) | |
5607 | return r == -ENOENT ? 0 : r; | |
5608 | ||
5609 | k = strlen(type); | |
5610 | ||
5611 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) { | |
5612 | if (l == k && strncmp(w, type, l) == 0) { | |
5613 | found = true; | |
5614 | break; | |
5615 | } | |
5616 | } | |
5617 | ||
5618 | free(p); | |
5619 | return found; | |
5620 | } | |
49dbfa7b LP |
5621 | |
5622 | bool is_valid_documentation_url(const char *url) { | |
5623 | assert(url); | |
5624 | ||
5625 | if (startswith(url, "http://") && url[7]) | |
5626 | return true; | |
5627 | ||
5628 | if (startswith(url, "https://") && url[8]) | |
5629 | return true; | |
5630 | ||
5631 | if (startswith(url, "file:") && url[5]) | |
5632 | return true; | |
5633 | ||
5634 | if (startswith(url, "info:") && url[5]) | |
5635 | return true; | |
5636 | ||
5637 | if (startswith(url, "man:") && url[4]) | |
5638 | return true; | |
5639 | ||
5640 | return false; | |
5641 | } | |
9be346c9 HH |
5642 | |
5643 | bool in_initrd(void) { | |
5644 | static bool checked=false; | |
5645 | static bool is_in_initrd=false; | |
5646 | ||
5647 | if (!checked) { | |
5648 | struct stat sb; | |
5649 | if (stat("/", &sb) == 0) { | |
5650 | is_in_initrd = (sb.st_dev == 1); | |
5651 | checked = true; | |
5652 | } | |
5653 | } | |
5654 | ||
5655 | return is_in_initrd; | |
5656 | } |