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Commit | Line | Data |
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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
60918275 LP |
22 | #include <assert.h> |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
85261803 | 26 | #include <stdlib.h> |
034c6ed7 LP |
27 | #include <signal.h> |
28 | #include <stdio.h> | |
1dccbe19 LP |
29 | #include <syslog.h> |
30 | #include <sched.h> | |
31 | #include <sys/resource.h> | |
ef886c6a | 32 | #include <linux/sched.h> |
a9f5d454 LP |
33 | #include <sys/types.h> |
34 | #include <sys/stat.h> | |
3a0ecb08 | 35 | #include <fcntl.h> |
a0d40ac5 | 36 | #include <dirent.h> |
601f6a1e LP |
37 | #include <sys/ioctl.h> |
38 | #include <linux/vt.h> | |
39 | #include <linux/tiocl.h> | |
80876c20 LP |
40 | #include <termios.h> |
41 | #include <stdarg.h> | |
42 | #include <sys/inotify.h> | |
43 | #include <sys/poll.h> | |
8d567588 | 44 | #include <libgen.h> |
3177a7fa | 45 | #include <ctype.h> |
5b6319dc | 46 | #include <sys/prctl.h> |
ef2f1067 LP |
47 | #include <sys/utsname.h> |
48 | #include <pwd.h> | |
4fd5948e | 49 | #include <netinet/ip.h> |
3fe5e5d4 | 50 | #include <linux/kd.h> |
afea26ad | 51 | #include <dlfcn.h> |
2e78aa99 | 52 | #include <sys/wait.h> |
ac123445 | 53 | #include <sys/capability.h> |
7948c4df KS |
54 | #include <sys/time.h> |
55 | #include <linux/rtc.h> | |
8092a428 | 56 | #include <glob.h> |
60918275 LP |
57 | |
58 | #include "macro.h" | |
59 | #include "util.h" | |
1dccbe19 LP |
60 | #include "ioprio.h" |
61 | #include "missing.h" | |
a9f5d454 | 62 | #include "log.h" |
65d2ebdc | 63 | #include "strv.h" |
e51bc1a2 | 64 | #include "label.h" |
d06dacd0 | 65 | #include "exit-status.h" |
83cc030f | 66 | #include "hashmap.h" |
56cf987f | 67 | |
9a0e6896 LP |
68 | int saved_argc = 0; |
69 | char **saved_argv = NULL; | |
70 | ||
37f85e66 | 71 | size_t page_size(void) { |
72 | static __thread size_t pgsz = 0; | |
73 | long r; | |
74 | ||
75 | if (pgsz) | |
76 | return pgsz; | |
77 | ||
78 | assert_se((r = sysconf(_SC_PAGESIZE)) > 0); | |
79 | ||
80 | pgsz = (size_t) r; | |
81 | ||
82 | return pgsz; | |
83 | } | |
84 | ||
e05797fb LP |
85 | bool streq_ptr(const char *a, const char *b) { |
86 | ||
87 | /* Like streq(), but tries to make sense of NULL pointers */ | |
88 | ||
89 | if (a && b) | |
90 | return streq(a, b); | |
91 | ||
92 | if (!a && !b) | |
93 | return true; | |
94 | ||
95 | return false; | |
96 | } | |
97 | ||
47be870b | 98 | usec_t now(clockid_t clock_id) { |
60918275 LP |
99 | struct timespec ts; |
100 | ||
47be870b | 101 | assert_se(clock_gettime(clock_id, &ts) == 0); |
60918275 LP |
102 | |
103 | return timespec_load(&ts); | |
104 | } | |
105 | ||
63983207 | 106 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { |
871d7de4 LP |
107 | assert(ts); |
108 | ||
109 | ts->realtime = now(CLOCK_REALTIME); | |
110 | ts->monotonic = now(CLOCK_MONOTONIC); | |
111 | ||
112 | return ts; | |
113 | } | |
114 | ||
a185c5aa LP |
115 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) { |
116 | int64_t delta; | |
117 | assert(ts); | |
118 | ||
119 | ts->realtime = u; | |
120 | ||
121 | if (u == 0) | |
122 | ts->monotonic = 0; | |
123 | else { | |
124 | delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; | |
125 | ||
126 | ts->monotonic = now(CLOCK_MONOTONIC); | |
127 | ||
128 | if ((int64_t) ts->monotonic > delta) | |
129 | ts->monotonic -= delta; | |
130 | else | |
131 | ts->monotonic = 0; | |
132 | } | |
133 | ||
134 | return ts; | |
135 | } | |
136 | ||
60918275 LP |
137 | usec_t timespec_load(const struct timespec *ts) { |
138 | assert(ts); | |
139 | ||
140 | return | |
141 | (usec_t) ts->tv_sec * USEC_PER_SEC + | |
142 | (usec_t) ts->tv_nsec / NSEC_PER_USEC; | |
143 | } | |
144 | ||
145 | struct timespec *timespec_store(struct timespec *ts, usec_t u) { | |
146 | assert(ts); | |
147 | ||
148 | ts->tv_sec = (time_t) (u / USEC_PER_SEC); | |
149 | ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); | |
150 | ||
151 | return ts; | |
152 | } | |
153 | ||
154 | usec_t timeval_load(const struct timeval *tv) { | |
155 | assert(tv); | |
156 | ||
157 | return | |
158 | (usec_t) tv->tv_sec * USEC_PER_SEC + | |
159 | (usec_t) tv->tv_usec; | |
160 | } | |
161 | ||
162 | struct timeval *timeval_store(struct timeval *tv, usec_t u) { | |
163 | assert(tv); | |
164 | ||
165 | tv->tv_sec = (time_t) (u / USEC_PER_SEC); | |
166 | tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); | |
167 | ||
168 | return tv; | |
169 | } | |
170 | ||
171 | bool endswith(const char *s, const char *postfix) { | |
172 | size_t sl, pl; | |
173 | ||
174 | assert(s); | |
175 | assert(postfix); | |
176 | ||
177 | sl = strlen(s); | |
178 | pl = strlen(postfix); | |
179 | ||
d4d0d4db LP |
180 | if (pl == 0) |
181 | return true; | |
182 | ||
60918275 LP |
183 | if (sl < pl) |
184 | return false; | |
185 | ||
186 | return memcmp(s + sl - pl, postfix, pl) == 0; | |
187 | } | |
188 | ||
189 | bool startswith(const char *s, const char *prefix) { | |
190 | size_t sl, pl; | |
191 | ||
192 | assert(s); | |
193 | assert(prefix); | |
194 | ||
195 | sl = strlen(s); | |
196 | pl = strlen(prefix); | |
197 | ||
d4d0d4db LP |
198 | if (pl == 0) |
199 | return true; | |
200 | ||
60918275 LP |
201 | if (sl < pl) |
202 | return false; | |
203 | ||
204 | return memcmp(s, prefix, pl) == 0; | |
205 | } | |
206 | ||
3177a7fa MAP |
207 | bool startswith_no_case(const char *s, const char *prefix) { |
208 | size_t sl, pl; | |
209 | unsigned i; | |
210 | ||
211 | assert(s); | |
212 | assert(prefix); | |
213 | ||
214 | sl = strlen(s); | |
215 | pl = strlen(prefix); | |
216 | ||
217 | if (pl == 0) | |
218 | return true; | |
219 | ||
220 | if (sl < pl) | |
221 | return false; | |
222 | ||
223 | for(i = 0; i < pl; ++i) { | |
224 | if (tolower(s[i]) != tolower(prefix[i])) | |
225 | return false; | |
226 | } | |
227 | ||
228 | return true; | |
229 | } | |
230 | ||
79d6d816 LP |
231 | bool first_word(const char *s, const char *word) { |
232 | size_t sl, wl; | |
233 | ||
234 | assert(s); | |
235 | assert(word); | |
236 | ||
237 | sl = strlen(s); | |
238 | wl = strlen(word); | |
239 | ||
240 | if (sl < wl) | |
241 | return false; | |
242 | ||
d4d0d4db LP |
243 | if (wl == 0) |
244 | return true; | |
245 | ||
79d6d816 LP |
246 | if (memcmp(s, word, wl) != 0) |
247 | return false; | |
248 | ||
d4d0d4db LP |
249 | return s[wl] == 0 || |
250 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
251 | } |
252 | ||
42f4e3c4 | 253 | int close_nointr(int fd) { |
60918275 LP |
254 | assert(fd >= 0); |
255 | ||
256 | for (;;) { | |
257 | int r; | |
258 | ||
48f82119 LP |
259 | r = close(fd); |
260 | if (r >= 0) | |
60918275 LP |
261 | return r; |
262 | ||
263 | if (errno != EINTR) | |
48f82119 | 264 | return -errno; |
60918275 LP |
265 | } |
266 | } | |
85261803 | 267 | |
85f136b5 | 268 | void close_nointr_nofail(int fd) { |
80876c20 | 269 | int saved_errno = errno; |
85f136b5 LP |
270 | |
271 | /* like close_nointr() but cannot fail, and guarantees errno | |
272 | * is unchanged */ | |
273 | ||
274 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
275 | |
276 | errno = saved_errno; | |
85f136b5 LP |
277 | } |
278 | ||
5b6319dc LP |
279 | void close_many(const int fds[], unsigned n_fd) { |
280 | unsigned i; | |
281 | ||
282 | for (i = 0; i < n_fd; i++) | |
283 | close_nointr_nofail(fds[i]); | |
284 | } | |
285 | ||
85261803 LP |
286 | int parse_boolean(const char *v) { |
287 | assert(v); | |
288 | ||
44d8db9e | 289 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on")) |
85261803 | 290 | return 1; |
44d8db9e | 291 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off")) |
85261803 LP |
292 | return 0; |
293 | ||
294 | return -EINVAL; | |
295 | } | |
296 | ||
3ba686c1 | 297 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 298 | unsigned long ul = 0; |
3ba686c1 LP |
299 | pid_t pid; |
300 | int r; | |
301 | ||
302 | assert(s); | |
303 | assert(ret_pid); | |
304 | ||
305 | if ((r = safe_atolu(s, &ul)) < 0) | |
306 | return r; | |
307 | ||
308 | pid = (pid_t) ul; | |
309 | ||
310 | if ((unsigned long) pid != ul) | |
311 | return -ERANGE; | |
312 | ||
313 | if (pid <= 0) | |
314 | return -ERANGE; | |
315 | ||
316 | *ret_pid = pid; | |
317 | return 0; | |
318 | } | |
319 | ||
85261803 LP |
320 | int safe_atou(const char *s, unsigned *ret_u) { |
321 | char *x = NULL; | |
034c6ed7 | 322 | unsigned long l; |
85261803 LP |
323 | |
324 | assert(s); | |
325 | assert(ret_u); | |
326 | ||
327 | errno = 0; | |
328 | l = strtoul(s, &x, 0); | |
329 | ||
330 | if (!x || *x || errno) | |
331 | return errno ? -errno : -EINVAL; | |
332 | ||
034c6ed7 | 333 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
334 | return -ERANGE; |
335 | ||
336 | *ret_u = (unsigned) l; | |
337 | return 0; | |
338 | } | |
339 | ||
340 | int safe_atoi(const char *s, int *ret_i) { | |
341 | char *x = NULL; | |
034c6ed7 | 342 | long l; |
85261803 LP |
343 | |
344 | assert(s); | |
345 | assert(ret_i); | |
346 | ||
347 | errno = 0; | |
348 | l = strtol(s, &x, 0); | |
349 | ||
350 | if (!x || *x || errno) | |
351 | return errno ? -errno : -EINVAL; | |
352 | ||
034c6ed7 | 353 | if ((long) (int) l != l) |
85261803 LP |
354 | return -ERANGE; |
355 | ||
034c6ed7 LP |
356 | *ret_i = (int) l; |
357 | return 0; | |
358 | } | |
359 | ||
034c6ed7 LP |
360 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
361 | char *x = NULL; | |
362 | unsigned long long l; | |
363 | ||
364 | assert(s); | |
365 | assert(ret_llu); | |
366 | ||
367 | errno = 0; | |
368 | l = strtoull(s, &x, 0); | |
369 | ||
370 | if (!x || *x || errno) | |
371 | return errno ? -errno : -EINVAL; | |
372 | ||
373 | *ret_llu = l; | |
374 | return 0; | |
375 | } | |
376 | ||
377 | int safe_atolli(const char *s, long long int *ret_lli) { | |
378 | char *x = NULL; | |
379 | long long l; | |
380 | ||
381 | assert(s); | |
382 | assert(ret_lli); | |
383 | ||
384 | errno = 0; | |
385 | l = strtoll(s, &x, 0); | |
386 | ||
387 | if (!x || *x || errno) | |
388 | return errno ? -errno : -EINVAL; | |
389 | ||
390 | *ret_lli = l; | |
85261803 LP |
391 | return 0; |
392 | } | |
a41e8209 | 393 | |
a41e8209 | 394 | /* Split a string into words. */ |
65d2ebdc | 395 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
396 | char *current; |
397 | ||
398 | current = *state ? *state : (char*) c; | |
399 | ||
400 | if (!*current || *c == 0) | |
401 | return NULL; | |
402 | ||
65d2ebdc LP |
403 | current += strspn(current, separator); |
404 | *l = strcspn(current, separator); | |
82919e3d LP |
405 | *state = current+*l; |
406 | ||
407 | return (char*) current; | |
408 | } | |
409 | ||
034c6ed7 LP |
410 | /* Split a string into words, but consider strings enclosed in '' and |
411 | * "" as words even if they include spaces. */ | |
412 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
413 | char *current, *e; |
414 | bool escaped = false; | |
034c6ed7 LP |
415 | |
416 | current = *state ? *state : (char*) c; | |
417 | ||
418 | if (!*current || *c == 0) | |
419 | return NULL; | |
420 | ||
421 | current += strspn(current, WHITESPACE); | |
422 | ||
423 | if (*current == '\'') { | |
424 | current ++; | |
034c6ed7 | 425 | |
0bab36f2 LP |
426 | for (e = current; *e; e++) { |
427 | if (escaped) | |
428 | escaped = false; | |
429 | else if (*e == '\\') | |
430 | escaped = true; | |
431 | else if (*e == '\'') | |
432 | break; | |
433 | } | |
434 | ||
435 | *l = e-current; | |
436 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
437 | } else if (*current == '\"') { |
438 | current ++; | |
034c6ed7 | 439 | |
0bab36f2 LP |
440 | for (e = current; *e; e++) { |
441 | if (escaped) | |
442 | escaped = false; | |
443 | else if (*e == '\\') | |
444 | escaped = true; | |
445 | else if (*e == '\"') | |
446 | break; | |
447 | } | |
448 | ||
449 | *l = e-current; | |
450 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 451 | } else { |
0bab36f2 LP |
452 | for (e = current; *e; e++) { |
453 | if (escaped) | |
454 | escaped = false; | |
455 | else if (*e == '\\') | |
456 | escaped = true; | |
457 | else if (strchr(WHITESPACE, *e)) | |
458 | break; | |
459 | } | |
460 | *l = e-current; | |
461 | *state = e; | |
034c6ed7 LP |
462 | } |
463 | ||
464 | return (char*) current; | |
465 | } | |
466 | ||
65d2ebdc LP |
467 | char **split_path_and_make_absolute(const char *p) { |
468 | char **l; | |
469 | assert(p); | |
470 | ||
471 | if (!(l = strv_split(p, ":"))) | |
472 | return NULL; | |
473 | ||
474 | if (!strv_path_make_absolute_cwd(l)) { | |
475 | strv_free(l); | |
476 | return NULL; | |
477 | } | |
478 | ||
479 | return l; | |
480 | } | |
481 | ||
034c6ed7 LP |
482 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
483 | int r; | |
484 | FILE *f; | |
20c03b7b | 485 | char fn[PATH_MAX], line[LINE_MAX], *p; |
bb00e604 | 486 | long unsigned ppid; |
034c6ed7 | 487 | |
8480e784 | 488 | assert(pid > 0); |
034c6ed7 LP |
489 | assert(_ppid); |
490 | ||
bb00e604 | 491 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
8480e784 | 492 | char_array_0(fn); |
034c6ed7 | 493 | |
ccaa6149 | 494 | if (!(f = fopen(fn, "re"))) |
034c6ed7 LP |
495 | return -errno; |
496 | ||
497 | if (!(fgets(line, sizeof(line), f))) { | |
498 | r = -errno; | |
499 | fclose(f); | |
500 | return r; | |
501 | } | |
502 | ||
503 | fclose(f); | |
504 | ||
505 | /* Let's skip the pid and comm fields. The latter is enclosed | |
506 | * in () but does not escape any () in its value, so let's | |
507 | * skip over it manually */ | |
508 | ||
509 | if (!(p = strrchr(line, ')'))) | |
510 | return -EIO; | |
511 | ||
512 | p++; | |
513 | ||
514 | if (sscanf(p, " " | |
515 | "%*c " /* state */ | |
bb00e604 | 516 | "%lu ", /* ppid */ |
034c6ed7 LP |
517 | &ppid) != 1) |
518 | return -EIO; | |
519 | ||
bb00e604 | 520 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
521 | return -ERANGE; |
522 | ||
523 | *_ppid = (pid_t) ppid; | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
7640a5de LP |
528 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
529 | int r; | |
530 | FILE *f; | |
531 | char fn[PATH_MAX], line[LINE_MAX], *p; | |
532 | ||
533 | assert(pid > 0); | |
534 | assert(st); | |
535 | ||
536 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); | |
537 | char_array_0(fn); | |
538 | ||
ccaa6149 | 539 | if (!(f = fopen(fn, "re"))) |
7640a5de LP |
540 | return -errno; |
541 | ||
542 | if (!(fgets(line, sizeof(line), f))) { | |
543 | r = -errno; | |
544 | fclose(f); | |
545 | return r; | |
546 | } | |
547 | ||
548 | fclose(f); | |
549 | ||
550 | /* Let's skip the pid and comm fields. The latter is enclosed | |
551 | * in () but does not escape any () in its value, so let's | |
552 | * skip over it manually */ | |
553 | ||
554 | if (!(p = strrchr(line, ')'))) | |
555 | return -EIO; | |
556 | ||
557 | p++; | |
558 | ||
559 | if (sscanf(p, " " | |
560 | "%*c " /* state */ | |
561 | "%*d " /* ppid */ | |
562 | "%*d " /* pgrp */ | |
563 | "%*d " /* session */ | |
564 | "%*d " /* tty_nr */ | |
565 | "%*d " /* tpgid */ | |
566 | "%*u " /* flags */ | |
567 | "%*u " /* minflt */ | |
568 | "%*u " /* cminflt */ | |
569 | "%*u " /* majflt */ | |
570 | "%*u " /* cmajflt */ | |
571 | "%*u " /* utime */ | |
572 | "%*u " /* stime */ | |
573 | "%*d " /* cutime */ | |
574 | "%*d " /* cstime */ | |
575 | "%*d " /* priority */ | |
576 | "%*d " /* nice */ | |
577 | "%*d " /* num_threads */ | |
578 | "%*d " /* itrealvalue */ | |
579 | "%llu " /* starttime */, | |
580 | st) != 1) | |
581 | return -EIO; | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
034c6ed7 LP |
586 | int write_one_line_file(const char *fn, const char *line) { |
587 | FILE *f; | |
588 | int r; | |
589 | ||
590 | assert(fn); | |
591 | assert(line); | |
592 | ||
593 | if (!(f = fopen(fn, "we"))) | |
594 | return -errno; | |
595 | ||
34ca941c | 596 | errno = 0; |
034c6ed7 LP |
597 | if (fputs(line, f) < 0) { |
598 | r = -errno; | |
599 | goto finish; | |
600 | } | |
601 | ||
8e1bd70d LP |
602 | if (!endswith(line, "\n")) |
603 | fputc('\n', f); | |
604 | ||
151b190e LP |
605 | fflush(f); |
606 | ||
607 | if (ferror(f)) { | |
608 | if (errno != 0) | |
609 | r = -errno; | |
610 | else | |
611 | r = -EIO; | |
612 | } else | |
613 | r = 0; | |
614 | ||
034c6ed7 LP |
615 | finish: |
616 | fclose(f); | |
617 | return r; | |
618 | } | |
619 | ||
34ca941c LP |
620 | int fchmod_umask(int fd, mode_t m) { |
621 | mode_t u; | |
622 | int r; | |
623 | ||
624 | u = umask(0777); | |
625 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
626 | umask(u); | |
627 | ||
628 | return r; | |
629 | } | |
630 | ||
631 | int write_one_line_file_atomic(const char *fn, const char *line) { | |
632 | FILE *f; | |
633 | int r; | |
634 | char *p; | |
635 | ||
636 | assert(fn); | |
637 | assert(line); | |
638 | ||
639 | r = fopen_temporary(fn, &f, &p); | |
640 | if (r < 0) | |
641 | return r; | |
642 | ||
643 | fchmod_umask(fileno(f), 0644); | |
644 | ||
645 | errno = 0; | |
646 | if (fputs(line, f) < 0) { | |
647 | r = -errno; | |
648 | goto finish; | |
649 | } | |
650 | ||
651 | if (!endswith(line, "\n")) | |
652 | fputc('\n', f); | |
653 | ||
654 | fflush(f); | |
655 | ||
656 | if (ferror(f)) { | |
657 | if (errno != 0) | |
658 | r = -errno; | |
659 | else | |
660 | r = -EIO; | |
661 | } else { | |
662 | if (rename(p, fn) < 0) | |
663 | r = -errno; | |
664 | else | |
665 | r = 0; | |
666 | } | |
667 | ||
668 | finish: | |
669 | if (r < 0) | |
670 | unlink(p); | |
671 | ||
672 | fclose(f); | |
673 | free(p); | |
674 | ||
675 | return r; | |
676 | } | |
677 | ||
034c6ed7 LP |
678 | int read_one_line_file(const char *fn, char **line) { |
679 | FILE *f; | |
680 | int r; | |
97c4a07d | 681 | char t[LINE_MAX], *c; |
034c6ed7 LP |
682 | |
683 | assert(fn); | |
684 | assert(line); | |
685 | ||
686 | if (!(f = fopen(fn, "re"))) | |
687 | return -errno; | |
688 | ||
689 | if (!(fgets(t, sizeof(t), f))) { | |
690 | r = -errno; | |
691 | goto finish; | |
692 | } | |
693 | ||
694 | if (!(c = strdup(t))) { | |
695 | r = -ENOMEM; | |
696 | goto finish; | |
697 | } | |
698 | ||
6f9a471a LP |
699 | truncate_nl(c); |
700 | ||
034c6ed7 LP |
701 | *line = c; |
702 | r = 0; | |
703 | ||
704 | finish: | |
705 | fclose(f); | |
706 | return r; | |
707 | } | |
44d8db9e | 708 | |
34ca941c | 709 | int read_full_file(const char *fn, char **contents, size_t *size) { |
97c4a07d LP |
710 | FILE *f; |
711 | int r; | |
712 | size_t n, l; | |
713 | char *buf = NULL; | |
714 | struct stat st; | |
715 | ||
716 | if (!(f = fopen(fn, "re"))) | |
717 | return -errno; | |
718 | ||
719 | if (fstat(fileno(f), &st) < 0) { | |
720 | r = -errno; | |
721 | goto finish; | |
722 | } | |
723 | ||
34ca941c LP |
724 | /* Safety check */ |
725 | if (st.st_size > 4*1024*1024) { | |
726 | r = -E2BIG; | |
727 | goto finish; | |
728 | } | |
729 | ||
97c4a07d LP |
730 | n = st.st_size > 0 ? st.st_size : LINE_MAX; |
731 | l = 0; | |
732 | ||
733 | for (;;) { | |
734 | char *t; | |
735 | size_t k; | |
736 | ||
737 | if (!(t = realloc(buf, n+1))) { | |
738 | r = -ENOMEM; | |
739 | goto finish; | |
740 | } | |
741 | ||
742 | buf = t; | |
743 | k = fread(buf + l, 1, n - l, f); | |
744 | ||
745 | if (k <= 0) { | |
746 | if (ferror(f)) { | |
747 | r = -errno; | |
748 | goto finish; | |
749 | } | |
750 | ||
751 | break; | |
752 | } | |
753 | ||
754 | l += k; | |
755 | n *= 2; | |
756 | ||
757 | /* Safety check */ | |
758 | if (n > 4*1024*1024) { | |
759 | r = -E2BIG; | |
760 | goto finish; | |
761 | } | |
762 | } | |
763 | ||
764 | if (buf) | |
765 | buf[l] = 0; | |
766 | else if (!(buf = calloc(1, 1))) { | |
767 | r = -errno; | |
768 | goto finish; | |
769 | } | |
770 | ||
771 | *contents = buf; | |
772 | buf = NULL; | |
773 | ||
34ca941c LP |
774 | if (size) |
775 | *size = l; | |
776 | ||
97c4a07d LP |
777 | r = 0; |
778 | ||
779 | finish: | |
780 | fclose(f); | |
781 | free(buf); | |
782 | ||
783 | return r; | |
784 | } | |
785 | ||
786 | int parse_env_file( | |
787 | const char *fname, | |
c899f8c6 | 788 | const char *separator, ...) { |
97c4a07d | 789 | |
ce8a6aa1 | 790 | int r = 0; |
97c4a07d LP |
791 | char *contents, *p; |
792 | ||
793 | assert(fname); | |
c899f8c6 | 794 | assert(separator); |
97c4a07d | 795 | |
34ca941c | 796 | if ((r = read_full_file(fname, &contents, NULL)) < 0) |
97c4a07d LP |
797 | return r; |
798 | ||
799 | p = contents; | |
800 | for (;;) { | |
801 | const char *key = NULL; | |
802 | ||
c899f8c6 | 803 | p += strspn(p, separator); |
97c4a07d LP |
804 | p += strspn(p, WHITESPACE); |
805 | ||
806 | if (!*p) | |
807 | break; | |
808 | ||
809 | if (!strchr(COMMENTS, *p)) { | |
810 | va_list ap; | |
811 | char **value; | |
812 | ||
c899f8c6 | 813 | va_start(ap, separator); |
97c4a07d LP |
814 | while ((key = va_arg(ap, char *))) { |
815 | size_t n; | |
816 | char *v; | |
817 | ||
818 | value = va_arg(ap, char **); | |
819 | ||
820 | n = strlen(key); | |
821 | if (strncmp(p, key, n) != 0 || | |
822 | p[n] != '=') | |
823 | continue; | |
824 | ||
825 | p += n + 1; | |
c899f8c6 | 826 | n = strcspn(p, separator); |
97c4a07d LP |
827 | |
828 | if (n >= 2 && | |
e7db37dd LP |
829 | strchr(QUOTES, p[0]) && |
830 | p[n-1] == p[0]) | |
97c4a07d LP |
831 | v = strndup(p+1, n-2); |
832 | else | |
833 | v = strndup(p, n); | |
834 | ||
835 | if (!v) { | |
836 | r = -ENOMEM; | |
837 | va_end(ap); | |
838 | goto fail; | |
839 | } | |
840 | ||
dd36de4d KS |
841 | if (v[0] == '\0') { |
842 | /* return empty value strings as NULL */ | |
843 | free(v); | |
844 | v = NULL; | |
845 | } | |
846 | ||
97c4a07d LP |
847 | free(*value); |
848 | *value = v; | |
849 | ||
850 | p += n; | |
ce8a6aa1 LP |
851 | |
852 | r ++; | |
97c4a07d LP |
853 | break; |
854 | } | |
855 | va_end(ap); | |
856 | } | |
857 | ||
858 | if (!key) | |
c899f8c6 | 859 | p += strcspn(p, separator); |
97c4a07d LP |
860 | } |
861 | ||
97c4a07d LP |
862 | fail: |
863 | free(contents); | |
864 | return r; | |
865 | } | |
866 | ||
8c7be95e LP |
867 | int load_env_file( |
868 | const char *fname, | |
869 | char ***rl) { | |
870 | ||
871 | FILE *f; | |
872 | char **m = 0; | |
873 | int r; | |
874 | ||
875 | assert(fname); | |
876 | assert(rl); | |
877 | ||
878 | if (!(f = fopen(fname, "re"))) | |
879 | return -errno; | |
880 | ||
881 | while (!feof(f)) { | |
882 | char l[LINE_MAX], *p, *u; | |
883 | char **t; | |
884 | ||
885 | if (!fgets(l, sizeof(l), f)) { | |
886 | if (feof(f)) | |
887 | break; | |
888 | ||
889 | r = -errno; | |
890 | goto finish; | |
891 | } | |
892 | ||
893 | p = strstrip(l); | |
894 | ||
895 | if (!*p) | |
896 | continue; | |
897 | ||
898 | if (strchr(COMMENTS, *p)) | |
899 | continue; | |
900 | ||
901 | if (!(u = normalize_env_assignment(p))) { | |
902 | log_error("Out of memory"); | |
903 | r = -ENOMEM; | |
904 | goto finish; | |
905 | } | |
906 | ||
907 | t = strv_append(m, u); | |
908 | free(u); | |
909 | ||
910 | if (!t) { | |
911 | log_error("Out of memory"); | |
912 | r = -ENOMEM; | |
913 | goto finish; | |
914 | } | |
915 | ||
916 | strv_free(m); | |
917 | m = t; | |
918 | } | |
919 | ||
920 | r = 0; | |
921 | ||
922 | *rl = m; | |
923 | m = NULL; | |
924 | ||
925 | finish: | |
926 | if (f) | |
927 | fclose(f); | |
928 | ||
929 | strv_free(m); | |
930 | ||
931 | return r; | |
932 | } | |
933 | ||
7640a5de | 934 | int write_env_file(const char *fname, char **l) { |
34ca941c | 935 | char **i, *p; |
7640a5de LP |
936 | FILE *f; |
937 | int r; | |
938 | ||
34ca941c LP |
939 | r = fopen_temporary(fname, &f, &p); |
940 | if (r < 0) | |
941 | return r; | |
7640a5de | 942 | |
34ca941c LP |
943 | fchmod_umask(fileno(f), 0644); |
944 | ||
945 | errno = 0; | |
7640a5de LP |
946 | STRV_FOREACH(i, l) { |
947 | fputs(*i, f); | |
948 | fputc('\n', f); | |
949 | } | |
950 | ||
951 | fflush(f); | |
952 | ||
34ca941c LP |
953 | if (ferror(f)) { |
954 | if (errno != 0) | |
955 | r = -errno; | |
956 | else | |
957 | r = -EIO; | |
958 | } else { | |
959 | if (rename(p, fname) < 0) | |
960 | r = -errno; | |
961 | else | |
962 | r = 0; | |
963 | } | |
964 | ||
965 | if (r < 0) | |
966 | unlink(p); | |
967 | ||
7640a5de | 968 | fclose(f); |
34ca941c | 969 | free(p); |
7640a5de LP |
970 | |
971 | return r; | |
972 | } | |
973 | ||
7072ced8 LP |
974 | char *truncate_nl(char *s) { |
975 | assert(s); | |
976 | ||
977 | s[strcspn(s, NEWLINE)] = 0; | |
978 | return s; | |
979 | } | |
980 | ||
981 | int get_process_name(pid_t pid, char **name) { | |
982 | char *p; | |
983 | int r; | |
984 | ||
985 | assert(pid >= 1); | |
986 | assert(name); | |
987 | ||
bb00e604 | 988 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) |
7072ced8 LP |
989 | return -ENOMEM; |
990 | ||
991 | r = read_one_line_file(p, name); | |
992 | free(p); | |
993 | ||
994 | if (r < 0) | |
995 | return r; | |
996 | ||
7072ced8 LP |
997 | return 0; |
998 | } | |
999 | ||
c59760ee LP |
1000 | int get_process_cmdline(pid_t pid, size_t max_length, char **line) { |
1001 | char *p, *r, *k; | |
1002 | int c; | |
1003 | bool space = false; | |
1004 | size_t left; | |
1005 | FILE *f; | |
1006 | ||
1007 | assert(pid >= 1); | |
1008 | assert(max_length > 0); | |
1009 | assert(line); | |
1010 | ||
1011 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1012 | return -ENOMEM; | |
1013 | ||
ccaa6149 | 1014 | f = fopen(p, "re"); |
c59760ee LP |
1015 | free(p); |
1016 | ||
1017 | if (!f) | |
1018 | return -errno; | |
1019 | ||
1020 | if (!(r = new(char, max_length))) { | |
1021 | fclose(f); | |
1022 | return -ENOMEM; | |
1023 | } | |
1024 | ||
1025 | k = r; | |
1026 | left = max_length; | |
1027 | while ((c = getc(f)) != EOF) { | |
1028 | ||
1029 | if (isprint(c)) { | |
1030 | if (space) { | |
1031 | if (left <= 4) | |
1032 | break; | |
1033 | ||
1034 | *(k++) = ' '; | |
057fbb58 | 1035 | left--; |
c59760ee LP |
1036 | space = false; |
1037 | } | |
1038 | ||
1039 | if (left <= 4) | |
1040 | break; | |
1041 | ||
1042 | *(k++) = (char) c; | |
057fbb58 | 1043 | left--; |
c59760ee LP |
1044 | } else |
1045 | space = true; | |
1046 | } | |
1047 | ||
1048 | if (left <= 4) { | |
1049 | size_t n = MIN(left-1, 3U); | |
1050 | memcpy(k, "...", n); | |
1051 | k[n] = 0; | |
1052 | } else | |
1053 | *k = 0; | |
1054 | ||
1055 | fclose(f); | |
1056 | ||
35d2e7ec LP |
1057 | /* Kernel threads have no argv[] */ |
1058 | if (r[0] == 0) { | |
1059 | char *t; | |
1060 | int h; | |
1061 | ||
1062 | free(r); | |
1063 | ||
1064 | if ((h = get_process_name(pid, &t)) < 0) | |
1065 | return h; | |
1066 | ||
1067 | h = asprintf(&r, "[%s]", t); | |
1068 | free(t); | |
1069 | ||
1070 | if (h < 0) | |
1071 | return -ENOMEM; | |
1072 | } | |
fa776d8e | 1073 | |
c59760ee LP |
1074 | *line = r; |
1075 | return 0; | |
1076 | } | |
1077 | ||
fab56fc5 LP |
1078 | char *strnappend(const char *s, const char *suffix, size_t b) { |
1079 | size_t a; | |
44d8db9e LP |
1080 | char *r; |
1081 | ||
fab56fc5 LP |
1082 | if (!s && !suffix) |
1083 | return strdup(""); | |
1084 | ||
1085 | if (!s) | |
1086 | return strndup(suffix, b); | |
1087 | ||
1088 | if (!suffix) | |
1089 | return strdup(s); | |
1090 | ||
44d8db9e LP |
1091 | assert(s); |
1092 | assert(suffix); | |
1093 | ||
1094 | a = strlen(s); | |
44d8db9e LP |
1095 | |
1096 | if (!(r = new(char, a+b+1))) | |
1097 | return NULL; | |
1098 | ||
1099 | memcpy(r, s, a); | |
1100 | memcpy(r+a, suffix, b); | |
1101 | r[a+b] = 0; | |
1102 | ||
1103 | return r; | |
1104 | } | |
87f0e418 | 1105 | |
fab56fc5 LP |
1106 | char *strappend(const char *s, const char *suffix) { |
1107 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
1108 | } | |
1109 | ||
87f0e418 LP |
1110 | int readlink_malloc(const char *p, char **r) { |
1111 | size_t l = 100; | |
1112 | ||
1113 | assert(p); | |
1114 | assert(r); | |
1115 | ||
1116 | for (;;) { | |
1117 | char *c; | |
1118 | ssize_t n; | |
1119 | ||
1120 | if (!(c = new(char, l))) | |
1121 | return -ENOMEM; | |
1122 | ||
1123 | if ((n = readlink(p, c, l-1)) < 0) { | |
1124 | int ret = -errno; | |
1125 | free(c); | |
1126 | return ret; | |
1127 | } | |
1128 | ||
1129 | if ((size_t) n < l-1) { | |
1130 | c[n] = 0; | |
1131 | *r = c; | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | free(c); | |
1136 | l *= 2; | |
1137 | } | |
1138 | } | |
1139 | ||
2c7108c4 LP |
1140 | int readlink_and_make_absolute(const char *p, char **r) { |
1141 | char *target, *k; | |
1142 | int j; | |
1143 | ||
1144 | assert(p); | |
1145 | assert(r); | |
1146 | ||
1147 | if ((j = readlink_malloc(p, &target)) < 0) | |
1148 | return j; | |
1149 | ||
1150 | k = file_in_same_dir(p, target); | |
1151 | free(target); | |
1152 | ||
1153 | if (!k) | |
1154 | return -ENOMEM; | |
1155 | ||
1156 | *r = k; | |
1157 | return 0; | |
1158 | } | |
1159 | ||
83096483 LP |
1160 | int readlink_and_canonicalize(const char *p, char **r) { |
1161 | char *t, *s; | |
1162 | int j; | |
1163 | ||
1164 | assert(p); | |
1165 | assert(r); | |
1166 | ||
1167 | j = readlink_and_make_absolute(p, &t); | |
1168 | if (j < 0) | |
1169 | return j; | |
1170 | ||
1171 | s = canonicalize_file_name(t); | |
1172 | if (s) { | |
1173 | free(t); | |
1174 | *r = s; | |
1175 | } else | |
1176 | *r = t; | |
1177 | ||
1178 | path_kill_slashes(*r); | |
1179 | ||
1180 | return 0; | |
1181 | } | |
1182 | ||
35d2e7ec LP |
1183 | int parent_of_path(const char *path, char **_r) { |
1184 | const char *e, *a = NULL, *b = NULL, *p; | |
1185 | char *r; | |
1186 | bool slash = false; | |
1187 | ||
1188 | assert(path); | |
1189 | assert(_r); | |
1190 | ||
1191 | if (!*path) | |
1192 | return -EINVAL; | |
1193 | ||
1194 | for (e = path; *e; e++) { | |
1195 | ||
1196 | if (!slash && *e == '/') { | |
1197 | a = b; | |
1198 | b = e; | |
1199 | slash = true; | |
1200 | } else if (slash && *e != '/') | |
1201 | slash = false; | |
1202 | } | |
1203 | ||
1204 | if (*(e-1) == '/') | |
1205 | p = a; | |
1206 | else | |
1207 | p = b; | |
1208 | ||
1209 | if (!p) | |
1210 | return -EINVAL; | |
1211 | ||
1212 | if (p == path) | |
1213 | r = strdup("/"); | |
1214 | else | |
1215 | r = strndup(path, p-path); | |
1216 | ||
1217 | if (!r) | |
1218 | return -ENOMEM; | |
1219 | ||
1220 | *_r = r; | |
1221 | return 0; | |
1222 | } | |
1223 | ||
1224 | ||
87f0e418 LP |
1225 | char *file_name_from_path(const char *p) { |
1226 | char *r; | |
1227 | ||
1228 | assert(p); | |
1229 | ||
1230 | if ((r = strrchr(p, '/'))) | |
1231 | return r + 1; | |
1232 | ||
1233 | return (char*) p; | |
1234 | } | |
0301abf4 LP |
1235 | |
1236 | bool path_is_absolute(const char *p) { | |
1237 | assert(p); | |
1238 | ||
1239 | return p[0] == '/'; | |
1240 | } | |
1241 | ||
1242 | bool is_path(const char *p) { | |
1243 | ||
1244 | return !!strchr(p, '/'); | |
1245 | } | |
1246 | ||
1247 | char *path_make_absolute(const char *p, const char *prefix) { | |
1248 | char *r; | |
1249 | ||
1250 | assert(p); | |
1251 | ||
65d2ebdc LP |
1252 | /* Makes every item in the list an absolute path by prepending |
1253 | * the prefix, if specified and necessary */ | |
1254 | ||
0301abf4 LP |
1255 | if (path_is_absolute(p) || !prefix) |
1256 | return strdup(p); | |
1257 | ||
1258 | if (asprintf(&r, "%s/%s", prefix, p) < 0) | |
1259 | return NULL; | |
1260 | ||
1261 | return r; | |
1262 | } | |
2a987ee8 | 1263 | |
65d2ebdc LP |
1264 | char *path_make_absolute_cwd(const char *p) { |
1265 | char *cwd, *r; | |
1266 | ||
1267 | assert(p); | |
1268 | ||
1269 | /* Similar to path_make_absolute(), but prefixes with the | |
1270 | * current working directory. */ | |
1271 | ||
1272 | if (path_is_absolute(p)) | |
1273 | return strdup(p); | |
1274 | ||
1275 | if (!(cwd = get_current_dir_name())) | |
1276 | return NULL; | |
1277 | ||
1278 | r = path_make_absolute(p, cwd); | |
1279 | free(cwd); | |
1280 | ||
1281 | return r; | |
1282 | } | |
1283 | ||
1284 | char **strv_path_make_absolute_cwd(char **l) { | |
1285 | char **s; | |
1286 | ||
1287 | /* Goes through every item in the string list and makes it | |
1288 | * absolute. This works in place and won't rollback any | |
1289 | * changes on failure. */ | |
1290 | ||
1291 | STRV_FOREACH(s, l) { | |
1292 | char *t; | |
1293 | ||
1294 | if (!(t = path_make_absolute_cwd(*s))) | |
1295 | return NULL; | |
1296 | ||
1297 | free(*s); | |
1298 | *s = t; | |
1299 | } | |
1300 | ||
1301 | return l; | |
1302 | } | |
1303 | ||
c3f6d675 LP |
1304 | char **strv_path_canonicalize(char **l) { |
1305 | char **s; | |
1306 | unsigned k = 0; | |
1307 | bool enomem = false; | |
1308 | ||
1309 | if (strv_isempty(l)) | |
1310 | return l; | |
1311 | ||
1312 | /* Goes through every item in the string list and canonicalize | |
1313 | * the path. This works in place and won't rollback any | |
1314 | * changes on failure. */ | |
1315 | ||
1316 | STRV_FOREACH(s, l) { | |
1317 | char *t, *u; | |
1318 | ||
1319 | t = path_make_absolute_cwd(*s); | |
1320 | free(*s); | |
1321 | ||
1322 | if (!t) { | |
1323 | enomem = true; | |
1324 | continue; | |
1325 | } | |
1326 | ||
1327 | errno = 0; | |
1328 | u = canonicalize_file_name(t); | |
1329 | free(t); | |
1330 | ||
1331 | if (!u) { | |
1332 | if (errno == ENOMEM || !errno) | |
1333 | enomem = true; | |
1334 | ||
1335 | continue; | |
1336 | } | |
1337 | ||
1338 | l[k++] = u; | |
1339 | } | |
1340 | ||
1341 | l[k] = NULL; | |
1342 | ||
1343 | if (enomem) | |
1344 | return NULL; | |
1345 | ||
1346 | return l; | |
a9dd2082 LP |
1347 | } |
1348 | ||
1349 | char **strv_path_remove_empty(char **l) { | |
1350 | char **f, **t; | |
1351 | ||
1352 | if (!l) | |
1353 | return NULL; | |
1354 | ||
1355 | for (f = t = l; *f; f++) { | |
1356 | ||
1357 | if (dir_is_empty(*f) > 0) { | |
1358 | free(*f); | |
1359 | continue; | |
1360 | } | |
1361 | ||
1362 | *(t++) = *f; | |
1363 | } | |
1364 | ||
1365 | *t = NULL; | |
1366 | return l; | |
c3f6d675 LP |
1367 | } |
1368 | ||
2a987ee8 LP |
1369 | int reset_all_signal_handlers(void) { |
1370 | int sig; | |
1371 | ||
1372 | for (sig = 1; sig < _NSIG; sig++) { | |
1373 | struct sigaction sa; | |
1374 | ||
1375 | if (sig == SIGKILL || sig == SIGSTOP) | |
1376 | continue; | |
1377 | ||
1378 | zero(sa); | |
1379 | sa.sa_handler = SIG_DFL; | |
431c32bf | 1380 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
1381 | |
1382 | /* On Linux the first two RT signals are reserved by | |
1383 | * glibc, and sigaction() will return EINVAL for them. */ | |
1384 | if ((sigaction(sig, &sa, NULL) < 0)) | |
1385 | if (errno != EINVAL) | |
1386 | return -errno; | |
1387 | } | |
1388 | ||
8e274523 | 1389 | return 0; |
2a987ee8 | 1390 | } |
4a72ff34 LP |
1391 | |
1392 | char *strstrip(char *s) { | |
1393 | char *e, *l = NULL; | |
1394 | ||
1395 | /* Drops trailing whitespace. Modifies the string in | |
1396 | * place. Returns pointer to first non-space character */ | |
1397 | ||
1398 | s += strspn(s, WHITESPACE); | |
1399 | ||
1400 | for (e = s; *e; e++) | |
1401 | if (!strchr(WHITESPACE, *e)) | |
1402 | l = e; | |
1403 | ||
1404 | if (l) | |
1405 | *(l+1) = 0; | |
1406 | else | |
1407 | *s = 0; | |
1408 | ||
1409 | return s; | |
4a72ff34 LP |
1410 | } |
1411 | ||
ee9b5e01 LP |
1412 | char *delete_chars(char *s, const char *bad) { |
1413 | char *f, *t; | |
1414 | ||
1415 | /* Drops all whitespace, regardless where in the string */ | |
1416 | ||
1417 | for (f = s, t = s; *f; f++) { | |
1418 | if (strchr(bad, *f)) | |
1419 | continue; | |
1420 | ||
1421 | *(t++) = *f; | |
1422 | } | |
1423 | ||
1424 | *t = 0; | |
1425 | ||
1426 | return s; | |
1427 | } | |
1428 | ||
4a72ff34 LP |
1429 | char *file_in_same_dir(const char *path, const char *filename) { |
1430 | char *e, *r; | |
1431 | size_t k; | |
1432 | ||
1433 | assert(path); | |
1434 | assert(filename); | |
1435 | ||
1436 | /* This removes the last component of path and appends | |
1437 | * filename, unless the latter is absolute anyway or the | |
1438 | * former isn't */ | |
1439 | ||
1440 | if (path_is_absolute(filename)) | |
1441 | return strdup(filename); | |
1442 | ||
1443 | if (!(e = strrchr(path, '/'))) | |
1444 | return strdup(filename); | |
1445 | ||
1446 | k = strlen(filename); | |
1447 | if (!(r = new(char, e-path+1+k+1))) | |
1448 | return NULL; | |
1449 | ||
1450 | memcpy(r, path, e-path+1); | |
1451 | memcpy(r+(e-path)+1, filename, k+1); | |
1452 | ||
1453 | return r; | |
1454 | } | |
fb624d04 | 1455 | |
8c6db833 LP |
1456 | int safe_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
1457 | struct stat st; | |
1458 | ||
56cf987f | 1459 | if (label_mkdir(path, mode) >= 0) |
8c6db833 LP |
1460 | if (chmod_and_chown(path, mode, uid, gid) < 0) |
1461 | return -errno; | |
1462 | ||
1463 | if (lstat(path, &st) < 0) | |
1464 | return -errno; | |
1465 | ||
1466 | if ((st.st_mode & 0777) != mode || | |
1467 | st.st_uid != uid || | |
1468 | st.st_gid != gid || | |
1469 | !S_ISDIR(st.st_mode)) { | |
1470 | errno = EEXIST; | |
1471 | return -errno; | |
1472 | } | |
1473 | ||
1474 | return 0; | |
1475 | } | |
1476 | ||
1477 | ||
a9f5d454 LP |
1478 | int mkdir_parents(const char *path, mode_t mode) { |
1479 | const char *p, *e; | |
1480 | ||
1481 | assert(path); | |
1482 | ||
1483 | /* Creates every parent directory in the path except the last | |
1484 | * component. */ | |
1485 | ||
1486 | p = path + strspn(path, "/"); | |
1487 | for (;;) { | |
1488 | int r; | |
1489 | char *t; | |
1490 | ||
1491 | e = p + strcspn(p, "/"); | |
1492 | p = e + strspn(e, "/"); | |
1493 | ||
1494 | /* Is this the last component? If so, then we're | |
1495 | * done */ | |
1496 | if (*p == 0) | |
1497 | return 0; | |
1498 | ||
1499 | if (!(t = strndup(path, e - path))) | |
1500 | return -ENOMEM; | |
1501 | ||
56cf987f | 1502 | r = label_mkdir(t, mode); |
a9f5d454 LP |
1503 | free(t); |
1504 | ||
1505 | if (r < 0 && errno != EEXIST) | |
1506 | return -errno; | |
1507 | } | |
1508 | } | |
1509 | ||
bbd67135 LP |
1510 | int mkdir_p(const char *path, mode_t mode) { |
1511 | int r; | |
1512 | ||
1513 | /* Like mkdir -p */ | |
1514 | ||
1515 | if ((r = mkdir_parents(path, mode)) < 0) | |
1516 | return r; | |
1517 | ||
56cf987f | 1518 | if (label_mkdir(path, mode) < 0 && errno != EEXIST) |
bbd67135 LP |
1519 | return -errno; |
1520 | ||
1521 | return 0; | |
1522 | } | |
1523 | ||
c32dd69b LP |
1524 | int rmdir_parents(const char *path, const char *stop) { |
1525 | size_t l; | |
1526 | int r = 0; | |
1527 | ||
1528 | assert(path); | |
1529 | assert(stop); | |
1530 | ||
1531 | l = strlen(path); | |
1532 | ||
1533 | /* Skip trailing slashes */ | |
1534 | while (l > 0 && path[l-1] == '/') | |
1535 | l--; | |
1536 | ||
1537 | while (l > 0) { | |
1538 | char *t; | |
1539 | ||
1540 | /* Skip last component */ | |
1541 | while (l > 0 && path[l-1] != '/') | |
1542 | l--; | |
1543 | ||
1544 | /* Skip trailing slashes */ | |
1545 | while (l > 0 && path[l-1] == '/') | |
1546 | l--; | |
1547 | ||
1548 | if (l <= 0) | |
1549 | break; | |
1550 | ||
1551 | if (!(t = strndup(path, l))) | |
1552 | return -ENOMEM; | |
1553 | ||
1554 | if (path_startswith(stop, t)) { | |
1555 | free(t); | |
1556 | return 0; | |
1557 | } | |
1558 | ||
1559 | r = rmdir(t); | |
1560 | free(t); | |
1561 | ||
1562 | if (r < 0) | |
1563 | if (errno != ENOENT) | |
1564 | return -errno; | |
1565 | } | |
1566 | ||
1567 | return 0; | |
1568 | } | |
1569 | ||
1570 | ||
fb624d04 LP |
1571 | char hexchar(int x) { |
1572 | static const char table[16] = "0123456789abcdef"; | |
1573 | ||
1574 | return table[x & 15]; | |
1575 | } | |
4fe88d28 LP |
1576 | |
1577 | int unhexchar(char c) { | |
1578 | ||
1579 | if (c >= '0' && c <= '9') | |
1580 | return c - '0'; | |
1581 | ||
1582 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1583 | return c - 'a' + 10; |
4fe88d28 LP |
1584 | |
1585 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1586 | return c - 'A' + 10; |
4fe88d28 LP |
1587 | |
1588 | return -1; | |
1589 | } | |
1590 | ||
1591 | char octchar(int x) { | |
1592 | return '0' + (x & 7); | |
1593 | } | |
1594 | ||
1595 | int unoctchar(char c) { | |
1596 | ||
1597 | if (c >= '0' && c <= '7') | |
1598 | return c - '0'; | |
1599 | ||
1600 | return -1; | |
1601 | } | |
1602 | ||
5af98f82 LP |
1603 | char decchar(int x) { |
1604 | return '0' + (x % 10); | |
1605 | } | |
1606 | ||
1607 | int undecchar(char c) { | |
1608 | ||
1609 | if (c >= '0' && c <= '9') | |
1610 | return c - '0'; | |
1611 | ||
1612 | return -1; | |
1613 | } | |
1614 | ||
4fe88d28 LP |
1615 | char *cescape(const char *s) { |
1616 | char *r, *t; | |
1617 | const char *f; | |
1618 | ||
1619 | assert(s); | |
1620 | ||
1621 | /* Does C style string escaping. */ | |
1622 | ||
1623 | if (!(r = new(char, strlen(s)*4 + 1))) | |
1624 | return NULL; | |
1625 | ||
1626 | for (f = s, t = r; *f; f++) | |
1627 | ||
1628 | switch (*f) { | |
1629 | ||
1630 | case '\a': | |
1631 | *(t++) = '\\'; | |
1632 | *(t++) = 'a'; | |
1633 | break; | |
1634 | case '\b': | |
1635 | *(t++) = '\\'; | |
1636 | *(t++) = 'b'; | |
1637 | break; | |
1638 | case '\f': | |
1639 | *(t++) = '\\'; | |
1640 | *(t++) = 'f'; | |
1641 | break; | |
1642 | case '\n': | |
1643 | *(t++) = '\\'; | |
1644 | *(t++) = 'n'; | |
1645 | break; | |
1646 | case '\r': | |
1647 | *(t++) = '\\'; | |
1648 | *(t++) = 'r'; | |
1649 | break; | |
1650 | case '\t': | |
1651 | *(t++) = '\\'; | |
1652 | *(t++) = 't'; | |
1653 | break; | |
1654 | case '\v': | |
1655 | *(t++) = '\\'; | |
1656 | *(t++) = 'v'; | |
1657 | break; | |
1658 | case '\\': | |
1659 | *(t++) = '\\'; | |
1660 | *(t++) = '\\'; | |
1661 | break; | |
1662 | case '"': | |
1663 | *(t++) = '\\'; | |
1664 | *(t++) = '"'; | |
1665 | break; | |
1666 | case '\'': | |
1667 | *(t++) = '\\'; | |
1668 | *(t++) = '\''; | |
1669 | break; | |
1670 | ||
1671 | default: | |
1672 | /* For special chars we prefer octal over | |
1673 | * hexadecimal encoding, simply because glib's | |
1674 | * g_strescape() does the same */ | |
1675 | if ((*f < ' ') || (*f >= 127)) { | |
1676 | *(t++) = '\\'; | |
1677 | *(t++) = octchar((unsigned char) *f >> 6); | |
1678 | *(t++) = octchar((unsigned char) *f >> 3); | |
1679 | *(t++) = octchar((unsigned char) *f); | |
1680 | } else | |
1681 | *(t++) = *f; | |
1682 | break; | |
1683 | } | |
1684 | ||
1685 | *t = 0; | |
1686 | ||
1687 | return r; | |
1688 | } | |
1689 | ||
6febfd0d | 1690 | char *cunescape_length(const char *s, size_t length) { |
4fe88d28 LP |
1691 | char *r, *t; |
1692 | const char *f; | |
1693 | ||
1694 | assert(s); | |
1695 | ||
1696 | /* Undoes C style string escaping */ | |
1697 | ||
6febfd0d | 1698 | if (!(r = new(char, length+1))) |
4fe88d28 LP |
1699 | return r; |
1700 | ||
6febfd0d | 1701 | for (f = s, t = r; f < s + length; f++) { |
4fe88d28 LP |
1702 | |
1703 | if (*f != '\\') { | |
1704 | *(t++) = *f; | |
1705 | continue; | |
1706 | } | |
1707 | ||
1708 | f++; | |
1709 | ||
1710 | switch (*f) { | |
1711 | ||
1712 | case 'a': | |
1713 | *(t++) = '\a'; | |
1714 | break; | |
1715 | case 'b': | |
1716 | *(t++) = '\b'; | |
1717 | break; | |
1718 | case 'f': | |
1719 | *(t++) = '\f'; | |
1720 | break; | |
1721 | case 'n': | |
1722 | *(t++) = '\n'; | |
1723 | break; | |
1724 | case 'r': | |
1725 | *(t++) = '\r'; | |
1726 | break; | |
1727 | case 't': | |
1728 | *(t++) = '\t'; | |
1729 | break; | |
1730 | case 'v': | |
1731 | *(t++) = '\v'; | |
1732 | break; | |
1733 | case '\\': | |
1734 | *(t++) = '\\'; | |
1735 | break; | |
1736 | case '"': | |
1737 | *(t++) = '"'; | |
1738 | break; | |
1739 | case '\'': | |
1740 | *(t++) = '\''; | |
1741 | break; | |
1742 | ||
e167fb86 LP |
1743 | case 's': |
1744 | /* This is an extension of the XDG syntax files */ | |
1745 | *(t++) = ' '; | |
1746 | break; | |
1747 | ||
4fe88d28 LP |
1748 | case 'x': { |
1749 | /* hexadecimal encoding */ | |
1750 | int a, b; | |
1751 | ||
1752 | if ((a = unhexchar(f[1])) < 0 || | |
1753 | (b = unhexchar(f[2])) < 0) { | |
1754 | /* Invalid escape code, let's take it literal then */ | |
1755 | *(t++) = '\\'; | |
1756 | *(t++) = 'x'; | |
1757 | } else { | |
1758 | *(t++) = (char) ((a << 4) | b); | |
1759 | f += 2; | |
1760 | } | |
1761 | ||
1762 | break; | |
1763 | } | |
1764 | ||
1765 | case '0': | |
1766 | case '1': | |
1767 | case '2': | |
1768 | case '3': | |
1769 | case '4': | |
1770 | case '5': | |
1771 | case '6': | |
1772 | case '7': { | |
1773 | /* octal encoding */ | |
1774 | int a, b, c; | |
1775 | ||
1776 | if ((a = unoctchar(f[0])) < 0 || | |
1777 | (b = unoctchar(f[1])) < 0 || | |
1778 | (c = unoctchar(f[2])) < 0) { | |
1779 | /* Invalid escape code, let's take it literal then */ | |
1780 | *(t++) = '\\'; | |
1781 | *(t++) = f[0]; | |
1782 | } else { | |
1783 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1784 | f += 2; | |
1785 | } | |
1786 | ||
1787 | break; | |
1788 | } | |
1789 | ||
1790 | case 0: | |
1791 | /* premature end of string.*/ | |
1792 | *(t++) = '\\'; | |
1793 | goto finish; | |
1794 | ||
1795 | default: | |
1796 | /* Invalid escape code, let's take it literal then */ | |
1797 | *(t++) = '\\'; | |
f3d4cc01 | 1798 | *(t++) = *f; |
4fe88d28 LP |
1799 | break; |
1800 | } | |
1801 | } | |
1802 | ||
1803 | finish: | |
1804 | *t = 0; | |
1805 | return r; | |
1806 | } | |
1807 | ||
6febfd0d LP |
1808 | char *cunescape(const char *s) { |
1809 | return cunescape_length(s, strlen(s)); | |
1810 | } | |
4fe88d28 LP |
1811 | |
1812 | char *xescape(const char *s, const char *bad) { | |
1813 | char *r, *t; | |
1814 | const char *f; | |
1815 | ||
1816 | /* Escapes all chars in bad, in addition to \ and all special | |
1817 | * chars, in \xFF style escaping. May be reversed with | |
1818 | * cunescape. */ | |
1819 | ||
1820 | if (!(r = new(char, strlen(s)*4+1))) | |
1821 | return NULL; | |
1822 | ||
1823 | for (f = s, t = r; *f; f++) { | |
1824 | ||
b866264a LP |
1825 | if ((*f < ' ') || (*f >= 127) || |
1826 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1827 | *(t++) = '\\'; |
1828 | *(t++) = 'x'; | |
1829 | *(t++) = hexchar(*f >> 4); | |
1830 | *(t++) = hexchar(*f); | |
1831 | } else | |
1832 | *(t++) = *f; | |
1833 | } | |
1834 | ||
1835 | *t = 0; | |
1836 | ||
1837 | return r; | |
1838 | } | |
1839 | ||
ea430986 | 1840 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1841 | char *r, *t; |
1842 | const char *f; | |
1843 | ||
47be870b LP |
1844 | assert(s); |
1845 | ||
ea430986 LP |
1846 | /* Escapes all chars that D-Bus' object path cannot deal |
1847 | * with. Can be reverse with bus_path_unescape() */ | |
1848 | ||
1849 | if (!(r = new(char, strlen(s)*3+1))) | |
1850 | return NULL; | |
1851 | ||
1852 | for (f = s, t = r; *f; f++) { | |
1853 | ||
1854 | if (!(*f >= 'A' && *f <= 'Z') && | |
1855 | !(*f >= 'a' && *f <= 'z') && | |
1856 | !(*f >= '0' && *f <= '9')) { | |
1857 | *(t++) = '_'; | |
1858 | *(t++) = hexchar(*f >> 4); | |
1859 | *(t++) = hexchar(*f); | |
1860 | } else | |
1861 | *(t++) = *f; | |
1862 | } | |
1863 | ||
1864 | *t = 0; | |
1865 | ||
1866 | return r; | |
1867 | } | |
1868 | ||
9e2f7c11 | 1869 | char *bus_path_unescape(const char *f) { |
ea430986 | 1870 | char *r, *t; |
ea430986 | 1871 | |
9e2f7c11 | 1872 | assert(f); |
47be870b | 1873 | |
9e2f7c11 | 1874 | if (!(r = strdup(f))) |
ea430986 LP |
1875 | return NULL; |
1876 | ||
9e2f7c11 | 1877 | for (t = r; *f; f++) { |
ea430986 LP |
1878 | |
1879 | if (*f == '_') { | |
1880 | int a, b; | |
1881 | ||
1882 | if ((a = unhexchar(f[1])) < 0 || | |
1883 | (b = unhexchar(f[2])) < 0) { | |
1884 | /* Invalid escape code, let's take it literal then */ | |
1885 | *(t++) = '_'; | |
1886 | } else { | |
1887 | *(t++) = (char) ((a << 4) | b); | |
1888 | f += 2; | |
1889 | } | |
1890 | } else | |
1891 | *(t++) = *f; | |
1892 | } | |
1893 | ||
1894 | *t = 0; | |
1895 | ||
1896 | return r; | |
1897 | } | |
1898 | ||
4fe88d28 LP |
1899 | char *path_kill_slashes(char *path) { |
1900 | char *f, *t; | |
1901 | bool slash = false; | |
1902 | ||
1903 | /* Removes redundant inner and trailing slashes. Modifies the | |
1904 | * passed string in-place. | |
1905 | * | |
1906 | * ///foo///bar/ becomes /foo/bar | |
1907 | */ | |
1908 | ||
1909 | for (f = path, t = path; *f; f++) { | |
1910 | ||
1911 | if (*f == '/') { | |
1912 | slash = true; | |
1913 | continue; | |
1914 | } | |
1915 | ||
1916 | if (slash) { | |
1917 | slash = false; | |
1918 | *(t++) = '/'; | |
1919 | } | |
1920 | ||
1921 | *(t++) = *f; | |
1922 | } | |
1923 | ||
1924 | /* Special rule, if we are talking of the root directory, a | |
1925 | trailing slash is good */ | |
1926 | ||
1927 | if (t == path && slash) | |
1928 | *(t++) = '/'; | |
1929 | ||
1930 | *t = 0; | |
1931 | return path; | |
1932 | } | |
1933 | ||
1934 | bool path_startswith(const char *path, const char *prefix) { | |
1935 | assert(path); | |
1936 | assert(prefix); | |
1937 | ||
1938 | if ((path[0] == '/') != (prefix[0] == '/')) | |
1939 | return false; | |
1940 | ||
1941 | for (;;) { | |
1942 | size_t a, b; | |
1943 | ||
1944 | path += strspn(path, "/"); | |
1945 | prefix += strspn(prefix, "/"); | |
1946 | ||
1947 | if (*prefix == 0) | |
1948 | return true; | |
1949 | ||
1950 | if (*path == 0) | |
1951 | return false; | |
1952 | ||
1953 | a = strcspn(path, "/"); | |
1954 | b = strcspn(prefix, "/"); | |
1955 | ||
1956 | if (a != b) | |
1957 | return false; | |
1958 | ||
1959 | if (memcmp(path, prefix, a) != 0) | |
1960 | return false; | |
1961 | ||
1962 | path += a; | |
1963 | prefix += b; | |
1964 | } | |
1965 | } | |
1966 | ||
15ae422b LP |
1967 | bool path_equal(const char *a, const char *b) { |
1968 | assert(a); | |
1969 | assert(b); | |
1970 | ||
1971 | if ((a[0] == '/') != (b[0] == '/')) | |
1972 | return false; | |
1973 | ||
1974 | for (;;) { | |
1975 | size_t j, k; | |
1976 | ||
1977 | a += strspn(a, "/"); | |
1978 | b += strspn(b, "/"); | |
1979 | ||
1980 | if (*a == 0 && *b == 0) | |
1981 | return true; | |
1982 | ||
1983 | if (*a == 0 || *b == 0) | |
1984 | return false; | |
1985 | ||
1986 | j = strcspn(a, "/"); | |
1987 | k = strcspn(b, "/"); | |
1988 | ||
1989 | if (j != k) | |
1990 | return false; | |
1991 | ||
1992 | if (memcmp(a, b, j) != 0) | |
1993 | return false; | |
1994 | ||
1995 | a += j; | |
1996 | b += k; | |
1997 | } | |
1998 | } | |
1999 | ||
67d51650 | 2000 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
2001 | char *p; |
2002 | ||
67d51650 | 2003 | assert(t); |
4fe88d28 | 2004 | |
67d51650 | 2005 | for (p = t; *p; p++) |
4fe88d28 LP |
2006 | if (*p >= 'A' && *p <= 'Z') |
2007 | *p = *p - 'A' + 'a'; | |
2008 | ||
67d51650 | 2009 | return t; |
4fe88d28 | 2010 | } |
1dccbe19 | 2011 | |
c85dc17b LP |
2012 | bool ignore_file(const char *filename) { |
2013 | assert(filename); | |
2014 | ||
2015 | return | |
2016 | filename[0] == '.' || | |
6c78be3c | 2017 | streq(filename, "lost+found") || |
e472d476 LP |
2018 | streq(filename, "aquota.user") || |
2019 | streq(filename, "aquota.group") || | |
c85dc17b LP |
2020 | endswith(filename, "~") || |
2021 | endswith(filename, ".rpmnew") || | |
2022 | endswith(filename, ".rpmsave") || | |
2023 | endswith(filename, ".rpmorig") || | |
2024 | endswith(filename, ".dpkg-old") || | |
2025 | endswith(filename, ".dpkg-new") || | |
2026 | endswith(filename, ".swp"); | |
2027 | } | |
2028 | ||
3a0ecb08 LP |
2029 | int fd_nonblock(int fd, bool nonblock) { |
2030 | int flags; | |
2031 | ||
2032 | assert(fd >= 0); | |
2033 | ||
2034 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
2035 | return -errno; | |
2036 | ||
2037 | if (nonblock) | |
2038 | flags |= O_NONBLOCK; | |
2039 | else | |
2040 | flags &= ~O_NONBLOCK; | |
2041 | ||
2042 | if (fcntl(fd, F_SETFL, flags) < 0) | |
2043 | return -errno; | |
2044 | ||
2045 | return 0; | |
2046 | } | |
2047 | ||
2048 | int fd_cloexec(int fd, bool cloexec) { | |
2049 | int flags; | |
2050 | ||
2051 | assert(fd >= 0); | |
2052 | ||
2053 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
2054 | return -errno; | |
2055 | ||
2056 | if (cloexec) | |
2057 | flags |= FD_CLOEXEC; | |
2058 | else | |
2059 | flags &= ~FD_CLOEXEC; | |
2060 | ||
2061 | if (fcntl(fd, F_SETFD, flags) < 0) | |
2062 | return -errno; | |
2063 | ||
2064 | return 0; | |
2065 | } | |
2066 | ||
a0d40ac5 LP |
2067 | int close_all_fds(const int except[], unsigned n_except) { |
2068 | DIR *d; | |
2069 | struct dirent *de; | |
2070 | int r = 0; | |
2071 | ||
2072 | if (!(d = opendir("/proc/self/fd"))) | |
2073 | return -errno; | |
2074 | ||
2075 | while ((de = readdir(d))) { | |
a7610064 | 2076 | int fd = -1; |
a0d40ac5 | 2077 | |
a16e1123 | 2078 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
2079 | continue; |
2080 | ||
720ce21d LP |
2081 | if (safe_atoi(de->d_name, &fd) < 0) |
2082 | /* Let's better ignore this, just in case */ | |
2083 | continue; | |
a0d40ac5 LP |
2084 | |
2085 | if (fd < 3) | |
2086 | continue; | |
2087 | ||
2088 | if (fd == dirfd(d)) | |
2089 | continue; | |
2090 | ||
2091 | if (except) { | |
2092 | bool found; | |
2093 | unsigned i; | |
2094 | ||
2095 | found = false; | |
2096 | for (i = 0; i < n_except; i++) | |
2097 | if (except[i] == fd) { | |
2098 | found = true; | |
2099 | break; | |
2100 | } | |
2101 | ||
2102 | if (found) | |
2103 | continue; | |
2104 | } | |
2105 | ||
720ce21d | 2106 | if (close_nointr(fd) < 0) { |
2f357920 | 2107 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
2108 | if (errno != EBADF && r == 0) |
2109 | r = -errno; | |
2f357920 | 2110 | } |
a0d40ac5 LP |
2111 | } |
2112 | ||
a0d40ac5 LP |
2113 | closedir(d); |
2114 | return r; | |
2115 | } | |
2116 | ||
db12775d LP |
2117 | bool chars_intersect(const char *a, const char *b) { |
2118 | const char *p; | |
2119 | ||
2120 | /* Returns true if any of the chars in a are in b. */ | |
2121 | for (p = a; *p; p++) | |
2122 | if (strchr(b, *p)) | |
2123 | return true; | |
2124 | ||
2125 | return false; | |
2126 | } | |
2127 | ||
8b6c7120 LP |
2128 | char *format_timestamp(char *buf, size_t l, usec_t t) { |
2129 | struct tm tm; | |
2130 | time_t sec; | |
2131 | ||
2132 | assert(buf); | |
2133 | assert(l > 0); | |
2134 | ||
2135 | if (t <= 0) | |
2136 | return NULL; | |
2137 | ||
f872ec33 | 2138 | sec = (time_t) (t / USEC_PER_SEC); |
8b6c7120 LP |
2139 | |
2140 | if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0) | |
2141 | return NULL; | |
2142 | ||
2143 | return buf; | |
2144 | } | |
2145 | ||
584be568 LP |
2146 | char *format_timestamp_pretty(char *buf, size_t l, usec_t t) { |
2147 | usec_t n, d; | |
2148 | ||
2149 | n = now(CLOCK_REALTIME); | |
2150 | ||
2151 | if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) | |
2152 | return NULL; | |
2153 | ||
2154 | d = n - t; | |
2155 | ||
2156 | if (d >= USEC_PER_YEAR) | |
2157 | snprintf(buf, l, "%llu years and %llu months ago", | |
2158 | (unsigned long long) (d / USEC_PER_YEAR), | |
2159 | (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); | |
2160 | else if (d >= USEC_PER_MONTH) | |
2161 | snprintf(buf, l, "%llu months and %llu days ago", | |
2162 | (unsigned long long) (d / USEC_PER_MONTH), | |
2163 | (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); | |
2164 | else if (d >= USEC_PER_WEEK) | |
2165 | snprintf(buf, l, "%llu weeks and %llu days ago", | |
2166 | (unsigned long long) (d / USEC_PER_WEEK), | |
2167 | (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); | |
2168 | else if (d >= 2*USEC_PER_DAY) | |
2169 | snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); | |
2170 | else if (d >= 25*USEC_PER_HOUR) | |
2171 | snprintf(buf, l, "1 day and %lluh ago", | |
2172 | (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); | |
2173 | else if (d >= 6*USEC_PER_HOUR) | |
2174 | snprintf(buf, l, "%lluh ago", | |
2175 | (unsigned long long) (d / USEC_PER_HOUR)); | |
2176 | else if (d >= USEC_PER_HOUR) | |
2177 | snprintf(buf, l, "%lluh %llumin ago", | |
2178 | (unsigned long long) (d / USEC_PER_HOUR), | |
2179 | (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); | |
2180 | else if (d >= 5*USEC_PER_MINUTE) | |
2181 | snprintf(buf, l, "%llumin ago", | |
2182 | (unsigned long long) (d / USEC_PER_MINUTE)); | |
2183 | else if (d >= USEC_PER_MINUTE) | |
2184 | snprintf(buf, l, "%llumin %llus ago", | |
2185 | (unsigned long long) (d / USEC_PER_MINUTE), | |
2186 | (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); | |
2187 | else if (d >= USEC_PER_SEC) | |
2188 | snprintf(buf, l, "%llus ago", | |
2189 | (unsigned long long) (d / USEC_PER_SEC)); | |
2190 | else if (d >= USEC_PER_MSEC) | |
2191 | snprintf(buf, l, "%llums ago", | |
2192 | (unsigned long long) (d / USEC_PER_MSEC)); | |
2193 | else if (d > 0) | |
2194 | snprintf(buf, l, "%lluus ago", | |
2195 | (unsigned long long) d); | |
2196 | else | |
2197 | snprintf(buf, l, "now"); | |
2198 | ||
2199 | buf[l-1] = 0; | |
2200 | return buf; | |
2201 | } | |
2202 | ||
871d7de4 LP |
2203 | char *format_timespan(char *buf, size_t l, usec_t t) { |
2204 | static const struct { | |
2205 | const char *suffix; | |
2206 | usec_t usec; | |
2207 | } table[] = { | |
2208 | { "w", USEC_PER_WEEK }, | |
2209 | { "d", USEC_PER_DAY }, | |
2210 | { "h", USEC_PER_HOUR }, | |
2211 | { "min", USEC_PER_MINUTE }, | |
2212 | { "s", USEC_PER_SEC }, | |
2213 | { "ms", USEC_PER_MSEC }, | |
2214 | { "us", 1 }, | |
2215 | }; | |
2216 | ||
2217 | unsigned i; | |
2218 | char *p = buf; | |
2219 | ||
2220 | assert(buf); | |
2221 | assert(l > 0); | |
2222 | ||
2223 | if (t == (usec_t) -1) | |
2224 | return NULL; | |
2225 | ||
4502d22c LP |
2226 | if (t == 0) { |
2227 | snprintf(p, l, "0"); | |
2228 | p[l-1] = 0; | |
2229 | return p; | |
2230 | } | |
2231 | ||
871d7de4 LP |
2232 | /* The result of this function can be parsed with parse_usec */ |
2233 | ||
2234 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
2235 | int k; | |
2236 | size_t n; | |
2237 | ||
2238 | if (t < table[i].usec) | |
2239 | continue; | |
2240 | ||
2241 | if (l <= 1) | |
2242 | break; | |
2243 | ||
2244 | k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix); | |
2245 | n = MIN((size_t) k, l); | |
2246 | ||
2247 | l -= n; | |
2248 | p += n; | |
2249 | ||
2250 | t %= table[i].usec; | |
2251 | } | |
2252 | ||
2253 | *p = 0; | |
2254 | ||
2255 | return buf; | |
2256 | } | |
2257 | ||
42856c10 LP |
2258 | bool fstype_is_network(const char *fstype) { |
2259 | static const char * const table[] = { | |
2260 | "cifs", | |
2261 | "smbfs", | |
2262 | "ncpfs", | |
2263 | "nfs", | |
ca139f94 LP |
2264 | "nfs4", |
2265 | "gfs", | |
2266 | "gfs2" | |
42856c10 LP |
2267 | }; |
2268 | ||
2269 | unsigned i; | |
2270 | ||
2271 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2272 | if (streq(table[i], fstype)) | |
2273 | return true; | |
2274 | ||
2275 | return false; | |
2276 | } | |
2277 | ||
601f6a1e LP |
2278 | int chvt(int vt) { |
2279 | int fd, r = 0; | |
2280 | ||
74bc3bdc | 2281 | if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) |
601f6a1e LP |
2282 | return -errno; |
2283 | ||
2284 | if (vt < 0) { | |
2285 | int tiocl[2] = { | |
2286 | TIOCL_GETKMSGREDIRECT, | |
2287 | 0 | |
2288 | }; | |
2289 | ||
2290 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) | |
2291 | return -errno; | |
2292 | ||
2293 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
2294 | } | |
2295 | ||
2296 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
2297 | r = -errno; | |
2298 | ||
a16e1123 | 2299 | close_nointr_nofail(r); |
601f6a1e LP |
2300 | return r; |
2301 | } | |
2302 | ||
80876c20 LP |
2303 | int read_one_char(FILE *f, char *ret, bool *need_nl) { |
2304 | struct termios old_termios, new_termios; | |
2305 | char c; | |
20c03b7b | 2306 | char line[LINE_MAX]; |
80876c20 LP |
2307 | |
2308 | assert(f); | |
2309 | assert(ret); | |
2310 | ||
2311 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
2312 | new_termios = old_termios; | |
2313 | ||
2314 | new_termios.c_lflag &= ~ICANON; | |
2315 | new_termios.c_cc[VMIN] = 1; | |
2316 | new_termios.c_cc[VTIME] = 0; | |
2317 | ||
2318 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
2319 | size_t k; | |
2320 | ||
2321 | k = fread(&c, 1, 1, f); | |
2322 | ||
2323 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2324 | ||
2325 | if (k <= 0) | |
2326 | return -EIO; | |
2327 | ||
2328 | if (need_nl) | |
2329 | *need_nl = c != '\n'; | |
2330 | ||
2331 | *ret = c; | |
2332 | return 0; | |
2333 | } | |
2334 | } | |
2335 | ||
2336 | if (!(fgets(line, sizeof(line), f))) | |
2337 | return -EIO; | |
2338 | ||
2339 | truncate_nl(line); | |
2340 | ||
2341 | if (strlen(line) != 1) | |
2342 | return -EBADMSG; | |
2343 | ||
2344 | if (need_nl) | |
2345 | *need_nl = false; | |
2346 | ||
2347 | *ret = line[0]; | |
2348 | return 0; | |
2349 | } | |
2350 | ||
2351 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 LP |
2352 | bool on_tty; |
2353 | ||
80876c20 LP |
2354 | assert(ret); |
2355 | assert(replies); | |
2356 | assert(text); | |
2357 | ||
1b39d4b9 LP |
2358 | on_tty = isatty(STDOUT_FILENO); |
2359 | ||
80876c20 LP |
2360 | for (;;) { |
2361 | va_list ap; | |
2362 | char c; | |
2363 | int r; | |
2364 | bool need_nl = true; | |
2365 | ||
1b39d4b9 LP |
2366 | if (on_tty) |
2367 | fputs("\x1B[1m", stdout); | |
b1b2dc0c | 2368 | |
80876c20 LP |
2369 | va_start(ap, text); |
2370 | vprintf(text, ap); | |
2371 | va_end(ap); | |
2372 | ||
1b39d4b9 LP |
2373 | if (on_tty) |
2374 | fputs("\x1B[0m", stdout); | |
b1b2dc0c | 2375 | |
80876c20 LP |
2376 | fflush(stdout); |
2377 | ||
2378 | if ((r = read_one_char(stdin, &c, &need_nl)) < 0) { | |
2379 | ||
2380 | if (r == -EBADMSG) { | |
2381 | puts("Bad input, please try again."); | |
2382 | continue; | |
2383 | } | |
2384 | ||
2385 | putchar('\n'); | |
2386 | return r; | |
2387 | } | |
2388 | ||
2389 | if (need_nl) | |
2390 | putchar('\n'); | |
2391 | ||
2392 | if (strchr(replies, c)) { | |
2393 | *ret = c; | |
2394 | return 0; | |
2395 | } | |
2396 | ||
2397 | puts("Read unexpected character, please try again."); | |
2398 | } | |
2399 | } | |
2400 | ||
6ea832a2 | 2401 | int reset_terminal_fd(int fd) { |
80876c20 LP |
2402 | struct termios termios; |
2403 | int r = 0; | |
3fe5e5d4 LP |
2404 | long arg; |
2405 | ||
2406 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
2407 | |
2408 | assert(fd >= 0); | |
2409 | ||
eed1d0e3 LP |
2410 | /* We leave locked terminal attributes untouched, so that |
2411 | * Plymouth may set whatever it wants to set, and we don't | |
2412 | * interfere with that. */ | |
3fe5e5d4 LP |
2413 | |
2414 | /* Disable exclusive mode, just in case */ | |
2415 | ioctl(fd, TIOCNXCL); | |
2416 | ||
2417 | /* Enable console unicode mode */ | |
2418 | arg = K_UNICODE; | |
2419 | ioctl(fd, KDSKBMODE, &arg); | |
80876c20 LP |
2420 | |
2421 | if (tcgetattr(fd, &termios) < 0) { | |
2422 | r = -errno; | |
2423 | goto finish; | |
2424 | } | |
2425 | ||
aaf694ca LP |
2426 | /* We only reset the stuff that matters to the software. How |
2427 | * hardware is set up we don't touch assuming that somebody | |
2428 | * else will do that for us */ | |
2429 | ||
2430 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
2431 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
2432 | termios.c_oflag |= ONLCR; | |
2433 | termios.c_cflag |= CREAD; | |
2434 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
2435 | ||
2436 | termios.c_cc[VINTR] = 03; /* ^C */ | |
2437 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
2438 | termios.c_cc[VERASE] = 0177; | |
2439 | termios.c_cc[VKILL] = 025; /* ^X */ | |
2440 | termios.c_cc[VEOF] = 04; /* ^D */ | |
2441 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
2442 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
2443 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
2444 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
2445 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
2446 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
2447 | termios.c_cc[VEOL] = 0; |
2448 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
2449 | |
2450 | termios.c_cc[VTIME] = 0; | |
2451 | termios.c_cc[VMIN] = 1; | |
2452 | ||
2453 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
2454 | r = -errno; | |
2455 | ||
2456 | finish: | |
2457 | /* Just in case, flush all crap out */ | |
2458 | tcflush(fd, TCIOFLUSH); | |
2459 | ||
2460 | return r; | |
2461 | } | |
2462 | ||
6ea832a2 LP |
2463 | int reset_terminal(const char *name) { |
2464 | int fd, r; | |
2465 | ||
2466 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
2467 | if (fd < 0) | |
2468 | return fd; | |
2469 | ||
2470 | r = reset_terminal_fd(fd); | |
2471 | close_nointr_nofail(fd); | |
2472 | ||
2473 | return r; | |
2474 | } | |
2475 | ||
80876c20 LP |
2476 | int open_terminal(const char *name, int mode) { |
2477 | int fd, r; | |
f73f76ac | 2478 | unsigned c = 0; |
80876c20 | 2479 | |
f73f76ac LP |
2480 | /* |
2481 | * If a TTY is in the process of being closed opening it might | |
2482 | * cause EIO. This is horribly awful, but unlikely to be | |
2483 | * changed in the kernel. Hence we work around this problem by | |
2484 | * retrying a couple of times. | |
2485 | * | |
2486 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
2487 | */ | |
2488 | ||
2489 | for (;;) { | |
2490 | if ((fd = open(name, mode)) >= 0) | |
2491 | break; | |
2492 | ||
2493 | if (errno != EIO) | |
2494 | return -errno; | |
2495 | ||
2496 | if (c >= 20) | |
2497 | return -errno; | |
2498 | ||
2499 | usleep(50 * USEC_PER_MSEC); | |
2500 | c++; | |
2501 | } | |
2502 | ||
2503 | if (fd < 0) | |
80876c20 LP |
2504 | return -errno; |
2505 | ||
2506 | if ((r = isatty(fd)) < 0) { | |
2507 | close_nointr_nofail(fd); | |
2508 | return -errno; | |
2509 | } | |
2510 | ||
2511 | if (!r) { | |
2512 | close_nointr_nofail(fd); | |
2513 | return -ENOTTY; | |
2514 | } | |
2515 | ||
2516 | return fd; | |
2517 | } | |
2518 | ||
2519 | int flush_fd(int fd) { | |
2520 | struct pollfd pollfd; | |
2521 | ||
2522 | zero(pollfd); | |
2523 | pollfd.fd = fd; | |
2524 | pollfd.events = POLLIN; | |
2525 | ||
2526 | for (;;) { | |
20c03b7b | 2527 | char buf[LINE_MAX]; |
80876c20 LP |
2528 | ssize_t l; |
2529 | int r; | |
2530 | ||
2531 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2532 | ||
2533 | if (errno == EINTR) | |
2534 | continue; | |
2535 | ||
2536 | return -errno; | |
2537 | } | |
2538 | ||
2539 | if (r == 0) | |
2540 | return 0; | |
2541 | ||
2542 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2543 | ||
2544 | if (errno == EINTR) | |
2545 | continue; | |
2546 | ||
2547 | if (errno == EAGAIN) | |
2548 | return 0; | |
2549 | ||
2550 | return -errno; | |
2551 | } | |
2552 | ||
2553 | if (l <= 0) | |
2554 | return 0; | |
2555 | } | |
2556 | } | |
2557 | ||
21de3988 | 2558 | int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm) { |
bab45044 | 2559 | int fd = -1, notify = -1, r, wd = -1; |
80876c20 LP |
2560 | |
2561 | assert(name); | |
2562 | ||
2563 | /* We use inotify to be notified when the tty is closed. We | |
2564 | * create the watch before checking if we can actually acquire | |
2565 | * it, so that we don't lose any event. | |
2566 | * | |
2567 | * Note: strictly speaking this actually watches for the | |
2568 | * device being closed, it does *not* really watch whether a | |
2569 | * tty loses its controlling process. However, unless some | |
2570 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2571 | * its tty otherwise this will not become a problem. As long | |
2572 | * as the administrator makes sure not configure any service | |
2573 | * on the same tty as an untrusted user this should not be a | |
2574 | * problem. (Which he probably should not do anyway.) */ | |
2575 | ||
2576 | if (!fail && !force) { | |
2577 | if ((notify = inotify_init1(IN_CLOEXEC)) < 0) { | |
2578 | r = -errno; | |
2579 | goto fail; | |
2580 | } | |
2581 | ||
2582 | if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) { | |
2583 | r = -errno; | |
2584 | goto fail; | |
2585 | } | |
2586 | } | |
2587 | ||
2588 | for (;;) { | |
e3d1855b LP |
2589 | if (notify >= 0) |
2590 | if ((r = flush_fd(notify)) < 0) | |
2591 | goto fail; | |
80876c20 LP |
2592 | |
2593 | /* We pass here O_NOCTTY only so that we can check the return | |
2594 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2595 | * successfully became the controlling process of the tty */ | |
6ea832a2 LP |
2596 | if ((fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) |
2597 | return fd; | |
80876c20 LP |
2598 | |
2599 | /* First, try to get the tty */ | |
21de3988 LP |
2600 | r = ioctl(fd, TIOCSCTTY, force); |
2601 | ||
2602 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2603 | * returning EPERM, i.e. when very likely we already | |
2604 | * are have this controlling terminal. */ | |
2605 | if (r < 0 && errno == EPERM && ignore_tiocstty_eperm) | |
2606 | r = 0; | |
2607 | ||
2608 | if (r < 0 && (force || fail || errno != EPERM)) { | |
80876c20 LP |
2609 | r = -errno; |
2610 | goto fail; | |
2611 | } | |
2612 | ||
2613 | if (r >= 0) | |
2614 | break; | |
2615 | ||
2616 | assert(!fail); | |
2617 | assert(!force); | |
2618 | assert(notify >= 0); | |
2619 | ||
2620 | for (;;) { | |
f601daa7 | 2621 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 2622 | ssize_t l; |
f601daa7 | 2623 | struct inotify_event *e; |
80876c20 | 2624 | |
f601daa7 | 2625 | if ((l = read(notify, &inotify_buffer, sizeof(inotify_buffer))) < 0) { |
80876c20 | 2626 | |
f601daa7 LP |
2627 | if (errno == EINTR) |
2628 | continue; | |
2629 | ||
2630 | r = -errno; | |
2631 | goto fail; | |
2632 | } | |
2633 | ||
2634 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2635 | |
f601daa7 LP |
2636 | while (l > 0) { |
2637 | size_t step; | |
80876c20 | 2638 | |
f601daa7 | 2639 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2640 | r = -EIO; |
f601daa7 LP |
2641 | goto fail; |
2642 | } | |
80876c20 | 2643 | |
f601daa7 LP |
2644 | step = sizeof(struct inotify_event) + e->len; |
2645 | assert(step <= (size_t) l); | |
80876c20 | 2646 | |
f601daa7 LP |
2647 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2648 | l -= step; | |
80876c20 LP |
2649 | } |
2650 | ||
2651 | break; | |
2652 | } | |
2653 | ||
2654 | /* We close the tty fd here since if the old session | |
2655 | * ended our handle will be dead. It's important that | |
2656 | * we do this after sleeping, so that we don't enter | |
2657 | * an endless loop. */ | |
2658 | close_nointr_nofail(fd); | |
2659 | } | |
2660 | ||
2661 | if (notify >= 0) | |
a16e1123 | 2662 | close_nointr_nofail(notify); |
80876c20 | 2663 | |
6ea832a2 | 2664 | if ((r = reset_terminal_fd(fd)) < 0) |
80876c20 LP |
2665 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2666 | ||
2667 | return fd; | |
2668 | ||
2669 | fail: | |
2670 | if (fd >= 0) | |
a16e1123 | 2671 | close_nointr_nofail(fd); |
80876c20 LP |
2672 | |
2673 | if (notify >= 0) | |
a16e1123 | 2674 | close_nointr_nofail(notify); |
80876c20 LP |
2675 | |
2676 | return r; | |
2677 | } | |
2678 | ||
2679 | int release_terminal(void) { | |
2680 | int r = 0, fd; | |
57cd2192 | 2681 | struct sigaction sa_old, sa_new; |
80876c20 | 2682 | |
ccaa6149 | 2683 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0) |
80876c20 LP |
2684 | return -errno; |
2685 | ||
57cd2192 LP |
2686 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2687 | * by our own TIOCNOTTY */ | |
2688 | ||
2689 | zero(sa_new); | |
2690 | sa_new.sa_handler = SIG_IGN; | |
2691 | sa_new.sa_flags = SA_RESTART; | |
2692 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2693 | ||
80876c20 LP |
2694 | if (ioctl(fd, TIOCNOTTY) < 0) |
2695 | r = -errno; | |
2696 | ||
57cd2192 LP |
2697 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2698 | ||
80876c20 LP |
2699 | close_nointr_nofail(fd); |
2700 | return r; | |
2701 | } | |
2702 | ||
9a34ec5f LP |
2703 | int sigaction_many(const struct sigaction *sa, ...) { |
2704 | va_list ap; | |
2705 | int r = 0, sig; | |
2706 | ||
2707 | va_start(ap, sa); | |
2708 | while ((sig = va_arg(ap, int)) > 0) | |
2709 | if (sigaction(sig, sa, NULL) < 0) | |
2710 | r = -errno; | |
2711 | va_end(ap); | |
2712 | ||
2713 | return r; | |
2714 | } | |
2715 | ||
2716 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2717 | struct sigaction sa; |
9a34ec5f LP |
2718 | va_list ap; |
2719 | int r = 0; | |
a337c6fc LP |
2720 | |
2721 | zero(sa); | |
2722 | sa.sa_handler = SIG_IGN; | |
2723 | sa.sa_flags = SA_RESTART; | |
2724 | ||
9a34ec5f LP |
2725 | if (sigaction(sig, &sa, NULL) < 0) |
2726 | r = -errno; | |
2727 | ||
2728 | va_start(ap, sig); | |
2729 | while ((sig = va_arg(ap, int)) > 0) | |
2730 | if (sigaction(sig, &sa, NULL) < 0) | |
2731 | r = -errno; | |
2732 | va_end(ap); | |
2733 | ||
2734 | return r; | |
2735 | } | |
2736 | ||
2737 | int default_signals(int sig, ...) { | |
2738 | struct sigaction sa; | |
2739 | va_list ap; | |
2740 | int r = 0; | |
2741 | ||
2742 | zero(sa); | |
2743 | sa.sa_handler = SIG_DFL; | |
2744 | sa.sa_flags = SA_RESTART; | |
2745 | ||
2746 | if (sigaction(sig, &sa, NULL) < 0) | |
2747 | r = -errno; | |
2748 | ||
2749 | va_start(ap, sig); | |
2750 | while ((sig = va_arg(ap, int)) > 0) | |
2751 | if (sigaction(sig, &sa, NULL) < 0) | |
2752 | r = -errno; | |
2753 | va_end(ap); | |
2754 | ||
2755 | return r; | |
a337c6fc LP |
2756 | } |
2757 | ||
8d567588 LP |
2758 | int close_pipe(int p[]) { |
2759 | int a = 0, b = 0; | |
2760 | ||
2761 | assert(p); | |
2762 | ||
2763 | if (p[0] >= 0) { | |
2764 | a = close_nointr(p[0]); | |
2765 | p[0] = -1; | |
2766 | } | |
2767 | ||
2768 | if (p[1] >= 0) { | |
2769 | b = close_nointr(p[1]); | |
2770 | p[1] = -1; | |
2771 | } | |
2772 | ||
2773 | return a < 0 ? a : b; | |
2774 | } | |
2775 | ||
eb22ac37 | 2776 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2777 | uint8_t *p; |
2778 | ssize_t n = 0; | |
2779 | ||
2780 | assert(fd >= 0); | |
2781 | assert(buf); | |
2782 | ||
2783 | p = buf; | |
2784 | ||
2785 | while (nbytes > 0) { | |
2786 | ssize_t k; | |
2787 | ||
2788 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2789 | ||
eb22ac37 | 2790 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2791 | continue; |
2792 | ||
eb22ac37 | 2793 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2794 | struct pollfd pollfd; |
2795 | ||
2796 | zero(pollfd); | |
2797 | pollfd.fd = fd; | |
2798 | pollfd.events = POLLIN; | |
2799 | ||
2800 | if (poll(&pollfd, 1, -1) < 0) { | |
2801 | if (errno == EINTR) | |
2802 | continue; | |
2803 | ||
2804 | return n > 0 ? n : -errno; | |
2805 | } | |
2806 | ||
2807 | if (pollfd.revents != POLLIN) | |
2808 | return n > 0 ? n : -EIO; | |
2809 | ||
2810 | continue; | |
2811 | } | |
2812 | ||
2813 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2814 | } | |
2815 | ||
2816 | p += k; | |
2817 | nbytes -= k; | |
2818 | n += k; | |
2819 | } | |
2820 | ||
2821 | return n; | |
2822 | } | |
2823 | ||
eb22ac37 LP |
2824 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2825 | const uint8_t *p; | |
2826 | ssize_t n = 0; | |
2827 | ||
2828 | assert(fd >= 0); | |
2829 | assert(buf); | |
2830 | ||
2831 | p = buf; | |
2832 | ||
2833 | while (nbytes > 0) { | |
2834 | ssize_t k; | |
2835 | ||
2836 | if ((k = write(fd, p, nbytes)) <= 0) { | |
2837 | ||
2838 | if (k < 0 && errno == EINTR) | |
2839 | continue; | |
2840 | ||
2841 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2842 | struct pollfd pollfd; | |
2843 | ||
2844 | zero(pollfd); | |
2845 | pollfd.fd = fd; | |
2846 | pollfd.events = POLLOUT; | |
2847 | ||
2848 | if (poll(&pollfd, 1, -1) < 0) { | |
2849 | if (errno == EINTR) | |
2850 | continue; | |
2851 | ||
2852 | return n > 0 ? n : -errno; | |
2853 | } | |
2854 | ||
2855 | if (pollfd.revents != POLLOUT) | |
2856 | return n > 0 ? n : -EIO; | |
2857 | ||
2858 | continue; | |
2859 | } | |
2860 | ||
2861 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2862 | } | |
2863 | ||
2864 | p += k; | |
2865 | nbytes -= k; | |
2866 | n += k; | |
2867 | } | |
2868 | ||
2869 | return n; | |
2870 | } | |
2871 | ||
8d567588 LP |
2872 | int path_is_mount_point(const char *t) { |
2873 | struct stat a, b; | |
35d2e7ec LP |
2874 | char *parent; |
2875 | int r; | |
8d567588 LP |
2876 | |
2877 | if (lstat(t, &a) < 0) { | |
8d567588 LP |
2878 | if (errno == ENOENT) |
2879 | return 0; | |
2880 | ||
2881 | return -errno; | |
2882 | } | |
2883 | ||
35d2e7ec LP |
2884 | if ((r = parent_of_path(t, &parent)) < 0) |
2885 | return r; | |
8d567588 | 2886 | |
35d2e7ec LP |
2887 | r = lstat(parent, &b); |
2888 | free(parent); | |
8d567588 | 2889 | |
35d2e7ec LP |
2890 | if (r < 0) |
2891 | return -errno; | |
8d567588 LP |
2892 | |
2893 | return a.st_dev != b.st_dev; | |
2894 | } | |
2895 | ||
24a6e4a4 LP |
2896 | int parse_usec(const char *t, usec_t *usec) { |
2897 | static const struct { | |
2898 | const char *suffix; | |
2899 | usec_t usec; | |
2900 | } table[] = { | |
2901 | { "sec", USEC_PER_SEC }, | |
2902 | { "s", USEC_PER_SEC }, | |
2903 | { "min", USEC_PER_MINUTE }, | |
2904 | { "hr", USEC_PER_HOUR }, | |
2905 | { "h", USEC_PER_HOUR }, | |
2906 | { "d", USEC_PER_DAY }, | |
2907 | { "w", USEC_PER_WEEK }, | |
2908 | { "msec", USEC_PER_MSEC }, | |
2909 | { "ms", USEC_PER_MSEC }, | |
2910 | { "m", USEC_PER_MINUTE }, | |
2911 | { "usec", 1ULL }, | |
2912 | { "us", 1ULL }, | |
2913 | { "", USEC_PER_SEC }, | |
2914 | }; | |
2915 | ||
2916 | const char *p; | |
2917 | usec_t r = 0; | |
2918 | ||
2919 | assert(t); | |
2920 | assert(usec); | |
2921 | ||
2922 | p = t; | |
2923 | do { | |
2924 | long long l; | |
2925 | char *e; | |
2926 | unsigned i; | |
2927 | ||
2928 | errno = 0; | |
2929 | l = strtoll(p, &e, 10); | |
2930 | ||
2931 | if (errno != 0) | |
2932 | return -errno; | |
2933 | ||
2934 | if (l < 0) | |
2935 | return -ERANGE; | |
2936 | ||
2937 | if (e == p) | |
2938 | return -EINVAL; | |
2939 | ||
2940 | e += strspn(e, WHITESPACE); | |
2941 | ||
2942 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2943 | if (startswith(e, table[i].suffix)) { | |
2944 | r += (usec_t) l * table[i].usec; | |
2945 | p = e + strlen(table[i].suffix); | |
2946 | break; | |
2947 | } | |
2948 | ||
2949 | if (i >= ELEMENTSOF(table)) | |
2950 | return -EINVAL; | |
2951 | ||
2952 | } while (*p != 0); | |
2953 | ||
2954 | *usec = r; | |
2955 | ||
2956 | return 0; | |
2957 | } | |
2958 | ||
843d2643 LP |
2959 | int make_stdio(int fd) { |
2960 | int r, s, t; | |
2961 | ||
2962 | assert(fd >= 0); | |
2963 | ||
2964 | r = dup2(fd, STDIN_FILENO); | |
2965 | s = dup2(fd, STDOUT_FILENO); | |
2966 | t = dup2(fd, STDERR_FILENO); | |
2967 | ||
2968 | if (fd >= 3) | |
2969 | close_nointr_nofail(fd); | |
2970 | ||
2971 | if (r < 0 || s < 0 || t < 0) | |
2972 | return -errno; | |
2973 | ||
7862f62d LP |
2974 | fd_cloexec(STDIN_FILENO, false); |
2975 | fd_cloexec(STDOUT_FILENO, false); | |
2976 | fd_cloexec(STDERR_FILENO, false); | |
2977 | ||
843d2643 LP |
2978 | return 0; |
2979 | } | |
2980 | ||
ade509ce LP |
2981 | int make_null_stdio(void) { |
2982 | int null_fd; | |
2983 | ||
2984 | if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) | |
2985 | return -errno; | |
2986 | ||
2987 | return make_stdio(null_fd); | |
2988 | } | |
2989 | ||
8407a5d0 LP |
2990 | bool is_device_path(const char *path) { |
2991 | ||
2992 | /* Returns true on paths that refer to a device, either in | |
2993 | * sysfs or in /dev */ | |
2994 | ||
2995 | return | |
2996 | path_startswith(path, "/dev/") || | |
2997 | path_startswith(path, "/sys/"); | |
2998 | } | |
2999 | ||
01f78473 LP |
3000 | int dir_is_empty(const char *path) { |
3001 | DIR *d; | |
3002 | int r; | |
3003 | struct dirent buf, *de; | |
3004 | ||
3005 | if (!(d = opendir(path))) | |
3006 | return -errno; | |
3007 | ||
3008 | for (;;) { | |
3009 | if ((r = readdir_r(d, &buf, &de)) > 0) { | |
3010 | r = -r; | |
3011 | break; | |
3012 | } | |
3013 | ||
3014 | if (!de) { | |
3015 | r = 1; | |
3016 | break; | |
3017 | } | |
3018 | ||
3019 | if (!ignore_file(de->d_name)) { | |
3020 | r = 0; | |
3021 | break; | |
3022 | } | |
3023 | } | |
3024 | ||
3025 | closedir(d); | |
3026 | return r; | |
3027 | } | |
3028 | ||
d3782d60 LP |
3029 | unsigned long long random_ull(void) { |
3030 | int fd; | |
3031 | uint64_t ull; | |
3032 | ssize_t r; | |
3033 | ||
3034 | if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0) | |
3035 | goto fallback; | |
3036 | ||
eb22ac37 | 3037 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
3038 | close_nointr_nofail(fd); |
3039 | ||
3040 | if (r != sizeof(ull)) | |
3041 | goto fallback; | |
3042 | ||
3043 | return ull; | |
3044 | ||
3045 | fallback: | |
3046 | return random() * RAND_MAX + random(); | |
3047 | } | |
3048 | ||
5b6319dc LP |
3049 | void rename_process(const char name[8]) { |
3050 | assert(name); | |
3051 | ||
3052 | prctl(PR_SET_NAME, name); | |
3053 | ||
3054 | /* This is a like a poor man's setproctitle(). The string | |
3055 | * passed should fit in 7 chars (i.e. the length of | |
3056 | * "systemd") */ | |
3057 | ||
3058 | if (program_invocation_name) | |
3059 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
3060 | |
3061 | if (saved_argc > 0) { | |
3062 | int i; | |
3063 | ||
3064 | if (saved_argv[0]) | |
3065 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
3066 | ||
3067 | for (i = 1; i < saved_argc; i++) { | |
3068 | if (!saved_argv[i]) | |
3069 | break; | |
3070 | ||
3071 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
3072 | } | |
3073 | } | |
5b6319dc LP |
3074 | } |
3075 | ||
7d793605 LP |
3076 | void sigset_add_many(sigset_t *ss, ...) { |
3077 | va_list ap; | |
3078 | int sig; | |
3079 | ||
3080 | assert(ss); | |
3081 | ||
3082 | va_start(ap, ss); | |
3083 | while ((sig = va_arg(ap, int)) > 0) | |
3084 | assert_se(sigaddset(ss, sig) == 0); | |
3085 | va_end(ap); | |
3086 | } | |
3087 | ||
ef2f1067 LP |
3088 | char* gethostname_malloc(void) { |
3089 | struct utsname u; | |
3090 | ||
3091 | assert_se(uname(&u) >= 0); | |
3092 | ||
3093 | if (u.nodename[0]) | |
3094 | return strdup(u.nodename); | |
3095 | ||
3096 | return strdup(u.sysname); | |
3097 | } | |
3098 | ||
3099 | char* getlogname_malloc(void) { | |
3100 | uid_t uid; | |
3101 | long bufsize; | |
3102 | char *buf, *name; | |
3103 | struct passwd pwbuf, *pw = NULL; | |
3104 | struct stat st; | |
3105 | ||
3106 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
3107 | uid = st.st_uid; | |
3108 | else | |
3109 | uid = getuid(); | |
3110 | ||
3111 | /* Shortcut things to avoid NSS lookups */ | |
3112 | if (uid == 0) | |
3113 | return strdup("root"); | |
3114 | ||
3115 | if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0) | |
3116 | bufsize = 4096; | |
3117 | ||
3118 | if (!(buf = malloc(bufsize))) | |
3119 | return NULL; | |
3120 | ||
3121 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) { | |
3122 | name = strdup(pw->pw_name); | |
3123 | free(buf); | |
3124 | return name; | |
3125 | } | |
3126 | ||
3127 | free(buf); | |
3128 | ||
3129 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
3130 | return NULL; | |
3131 | ||
3132 | return name; | |
3133 | } | |
3134 | ||
fc116c6a LP |
3135 | int getttyname_malloc(int fd, char **r) { |
3136 | char path[PATH_MAX], *c; | |
618e02c7 | 3137 | int k; |
8c6db833 LP |
3138 | |
3139 | assert(r); | |
ef2f1067 | 3140 | |
fc116c6a | 3141 | if ((k = ttyname_r(fd, path, sizeof(path))) != 0) |
618e02c7 | 3142 | return -k; |
ef2f1067 LP |
3143 | |
3144 | char_array_0(path); | |
3145 | ||
fc116c6a | 3146 | if (!(c = strdup(startswith(path, "/dev/") ? path + 5 : path))) |
8c6db833 LP |
3147 | return -ENOMEM; |
3148 | ||
3149 | *r = c; | |
3150 | return 0; | |
3151 | } | |
3152 | ||
fc116c6a LP |
3153 | int getttyname_harder(int fd, char **r) { |
3154 | int k; | |
3155 | char *s; | |
3156 | ||
3157 | if ((k = getttyname_malloc(fd, &s)) < 0) | |
3158 | return k; | |
3159 | ||
3160 | if (streq(s, "tty")) { | |
3161 | free(s); | |
4d6d6518 | 3162 | return get_ctty(0, NULL, r); |
fc116c6a LP |
3163 | } |
3164 | ||
3165 | *r = s; | |
3166 | return 0; | |
3167 | } | |
3168 | ||
4d6d6518 | 3169 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
fc116c6a | 3170 | int k; |
4d6d6518 | 3171 | char line[LINE_MAX], *p, *fn; |
fc116c6a LP |
3172 | unsigned long ttynr; |
3173 | FILE *f; | |
3174 | ||
4d6d6518 LP |
3175 | if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0) |
3176 | return -ENOMEM; | |
3177 | ||
3178 | f = fopen(fn, "re"); | |
3179 | free(fn); | |
3180 | if (!f) | |
fc116c6a LP |
3181 | return -errno; |
3182 | ||
4d6d6518 | 3183 | if (!fgets(line, sizeof(line), f)) { |
fc116c6a LP |
3184 | k = -errno; |
3185 | fclose(f); | |
3186 | return k; | |
3187 | } | |
3188 | ||
3189 | fclose(f); | |
3190 | ||
4d6d6518 LP |
3191 | p = strrchr(line, ')'); |
3192 | if (!p) | |
fc116c6a LP |
3193 | return -EIO; |
3194 | ||
3195 | p++; | |
3196 | ||
3197 | if (sscanf(p, " " | |
3198 | "%*c " /* state */ | |
3199 | "%*d " /* ppid */ | |
3200 | "%*d " /* pgrp */ | |
3201 | "%*d " /* session */ | |
3202 | "%lu ", /* ttynr */ | |
3203 | &ttynr) != 1) | |
3204 | return -EIO; | |
3205 | ||
3206 | *d = (dev_t) ttynr; | |
3207 | return 0; | |
3208 | } | |
3209 | ||
4d6d6518 | 3210 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 3211 | int k; |
20c03b7b | 3212 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
3213 | dev_t devnr; |
3214 | ||
3215 | assert(r); | |
3216 | ||
4d6d6518 LP |
3217 | k = get_ctty_devnr(pid, &devnr); |
3218 | if (k < 0) | |
fc116c6a LP |
3219 | return k; |
3220 | ||
3221 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
3222 | char_array_0(fn); | |
3223 | ||
3224 | if ((k = readlink_malloc(fn, &s)) < 0) { | |
3225 | ||
3226 | if (k != -ENOENT) | |
3227 | return k; | |
3228 | ||
46824d0e LP |
3229 | /* This is an ugly hack */ |
3230 | if (major(devnr) == 136) { | |
3231 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
3232 | return -ENOMEM; | |
3233 | ||
3234 | *r = b; | |
3235 | if (_devnr) | |
3236 | *_devnr = devnr; | |
3237 | ||
3238 | return 0; | |
3239 | } | |
3240 | ||
fc116c6a LP |
3241 | /* Probably something like the ptys which have no |
3242 | * symlink in /dev/char. Let's return something | |
3243 | * vaguely useful. */ | |
3244 | ||
3245 | if (!(b = strdup(fn + 5))) | |
3246 | return -ENOMEM; | |
3247 | ||
3248 | *r = b; | |
46824d0e LP |
3249 | if (_devnr) |
3250 | *_devnr = devnr; | |
3251 | ||
fc116c6a LP |
3252 | return 0; |
3253 | } | |
3254 | ||
3255 | if (startswith(s, "/dev/")) | |
3256 | p = s + 5; | |
3257 | else if (startswith(s, "../")) | |
3258 | p = s + 3; | |
3259 | else | |
3260 | p = s; | |
3261 | ||
3262 | b = strdup(p); | |
3263 | free(s); | |
3264 | ||
3265 | if (!b) | |
3266 | return -ENOMEM; | |
3267 | ||
3268 | *r = b; | |
46824d0e LP |
3269 | if (_devnr) |
3270 | *_devnr = devnr; | |
3271 | ||
fc116c6a LP |
3272 | return 0; |
3273 | } | |
3274 | ||
8c6db833 LP |
3275 | static int rm_rf_children(int fd, bool only_dirs) { |
3276 | DIR *d; | |
3277 | int ret = 0; | |
3278 | ||
3279 | assert(fd >= 0); | |
3280 | ||
3281 | /* This returns the first error we run into, but nevertheless | |
3282 | * tries to go on */ | |
3283 | ||
3284 | if (!(d = fdopendir(fd))) { | |
3285 | close_nointr_nofail(fd); | |
4c633005 LP |
3286 | |
3287 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
3288 | } |
3289 | ||
3290 | for (;;) { | |
3291 | struct dirent buf, *de; | |
3292 | bool is_dir; | |
3293 | int r; | |
3294 | ||
3295 | if ((r = readdir_r(d, &buf, &de)) != 0) { | |
3296 | if (ret == 0) | |
3297 | ret = -r; | |
3298 | break; | |
3299 | } | |
3300 | ||
3301 | if (!de) | |
3302 | break; | |
3303 | ||
3304 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
3305 | continue; | |
3306 | ||
3307 | if (de->d_type == DT_UNKNOWN) { | |
3308 | struct stat st; | |
3309 | ||
3310 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { | |
4c633005 | 3311 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3312 | ret = -errno; |
3313 | continue; | |
3314 | } | |
3315 | ||
3316 | is_dir = S_ISDIR(st.st_mode); | |
3317 | } else | |
3318 | is_dir = de->d_type == DT_DIR; | |
3319 | ||
3320 | if (is_dir) { | |
3321 | int subdir_fd; | |
3322 | ||
3323 | if ((subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) { | |
4c633005 | 3324 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3325 | ret = -errno; |
3326 | continue; | |
3327 | } | |
3328 | ||
3329 | if ((r = rm_rf_children(subdir_fd, only_dirs)) < 0) { | |
3330 | if (ret == 0) | |
3331 | ret = r; | |
3332 | } | |
3333 | ||
3334 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
4c633005 | 3335 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3336 | ret = -errno; |
3337 | } | |
3338 | } else if (!only_dirs) { | |
3339 | ||
3340 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3341 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3342 | ret = -errno; |
3343 | } | |
3344 | } | |
3345 | } | |
3346 | ||
3347 | closedir(d); | |
3348 | ||
3349 | return ret; | |
3350 | } | |
3351 | ||
3352 | int rm_rf(const char *path, bool only_dirs, bool delete_root) { | |
3353 | int fd; | |
3354 | int r; | |
3355 | ||
3356 | assert(path); | |
3357 | ||
3358 | if ((fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) { | |
3359 | ||
3360 | if (errno != ENOTDIR) | |
3361 | return -errno; | |
3362 | ||
3363 | if (delete_root && !only_dirs) | |
3364 | if (unlink(path) < 0) | |
3365 | return -errno; | |
3366 | ||
3367 | return 0; | |
3368 | } | |
3369 | ||
3370 | r = rm_rf_children(fd, only_dirs); | |
3371 | ||
3372 | if (delete_root) | |
3373 | if (rmdir(path) < 0) { | |
3374 | if (r == 0) | |
3375 | r = -errno; | |
3376 | } | |
3377 | ||
3378 | return r; | |
3379 | } | |
3380 | ||
3381 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { | |
3382 | assert(path); | |
3383 | ||
3384 | /* Under the assumption that we are running privileged we | |
3385 | * first change the access mode and only then hand out | |
3386 | * ownership to avoid a window where access is too open. */ | |
3387 | ||
3388 | if (chmod(path, mode) < 0) | |
3389 | return -errno; | |
3390 | ||
3391 | if (chown(path, uid, gid) < 0) | |
3392 | return -errno; | |
3393 | ||
3394 | return 0; | |
ef2f1067 LP |
3395 | } |
3396 | ||
82c121a4 LP |
3397 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3398 | cpu_set_t *r; | |
3399 | unsigned n = 1024; | |
3400 | ||
3401 | /* Allocates the cpuset in the right size */ | |
3402 | ||
3403 | for (;;) { | |
3404 | if (!(r = CPU_ALLOC(n))) | |
3405 | return NULL; | |
3406 | ||
3407 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3408 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3409 | ||
3410 | if (ncpus) | |
3411 | *ncpus = n; | |
3412 | ||
3413 | return r; | |
3414 | } | |
3415 | ||
3416 | CPU_FREE(r); | |
3417 | ||
3418 | if (errno != EINVAL) | |
3419 | return NULL; | |
3420 | ||
3421 | n *= 2; | |
3422 | } | |
3423 | } | |
3424 | ||
9e58ff9c LP |
3425 | void status_vprintf(const char *format, va_list ap) { |
3426 | char *s = NULL; | |
3427 | int fd = -1; | |
3428 | ||
3429 | assert(format); | |
3430 | ||
3431 | /* This independent of logging, as status messages are | |
3432 | * optional and go exclusively to the console. */ | |
3433 | ||
3434 | if (vasprintf(&s, format, ap) < 0) | |
3435 | goto finish; | |
3436 | ||
3437 | if ((fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) | |
3438 | goto finish; | |
3439 | ||
3440 | write(fd, s, strlen(s)); | |
3441 | ||
3442 | finish: | |
3443 | free(s); | |
3444 | ||
3445 | if (fd >= 0) | |
3446 | close_nointr_nofail(fd); | |
3447 | } | |
3448 | ||
c846ff47 LP |
3449 | void status_printf(const char *format, ...) { |
3450 | va_list ap; | |
3451 | ||
3452 | assert(format); | |
3453 | ||
3454 | va_start(ap, format); | |
3455 | status_vprintf(format, ap); | |
3456 | va_end(ap); | |
3457 | } | |
3458 | ||
3459 | void status_welcome(void) { | |
10aa7034 LP |
3460 | char *pretty_name = NULL, *ansi_color = NULL; |
3461 | const char *const_pretty = NULL, *const_color = NULL; | |
3462 | int r; | |
c846ff47 | 3463 | |
10aa7034 LP |
3464 | if ((r = parse_env_file("/etc/os-release", NEWLINE, |
3465 | "PRETTY_NAME", &pretty_name, | |
3466 | "ANSI_COLOR", &ansi_color, | |
3467 | NULL)) < 0) { | |
c846ff47 | 3468 | |
10aa7034 LP |
3469 | if (r != -ENOENT) |
3470 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3471 | } | |
c846ff47 | 3472 | |
10aa7034 LP |
3473 | #if defined(TARGET_FEDORA) |
3474 | if (!pretty_name) { | |
3475 | if ((r = read_one_line_file("/etc/system-release", &pretty_name)) < 0) { | |
c846ff47 | 3476 | |
10aa7034 LP |
3477 | if (r != -ENOENT) |
3478 | log_warning("Failed to read /etc/system-release: %s", strerror(-r)); | |
6f9a471a | 3479 | } |
10aa7034 | 3480 | } |
c846ff47 | 3481 | |
10aa7034 | 3482 | if (!ansi_color && pretty_name) { |
c846ff47 | 3483 | |
10aa7034 LP |
3484 | /* This tries to mimic the color magic the old Red Hat sysinit |
3485 | * script did. */ | |
3486 | ||
3487 | if (startswith(pretty_name, "Red Hat")) | |
3488 | const_color = "0;31"; /* Red for RHEL */ | |
3489 | else if (startswith(pretty_name, "Fedora")) | |
3490 | const_color = "0;34"; /* Blue for Fedora */ | |
3491 | } | |
c846ff47 LP |
3492 | |
3493 | #elif defined(TARGET_SUSE) | |
c846ff47 | 3494 | |
10aa7034 LP |
3495 | if (!pretty_name) { |
3496 | if ((r = read_one_line_file("/etc/SuSE-release", &pretty_name)) < 0) { | |
c846ff47 | 3497 | |
10aa7034 LP |
3498 | if (r != -ENOENT) |
3499 | log_warning("Failed to read /etc/SuSE-release: %s", strerror(-r)); | |
6f9a471a | 3500 | } |
10aa7034 | 3501 | } |
c846ff47 | 3502 | |
10aa7034 LP |
3503 | if (!ansi_color) |
3504 | const_color = "0;32"; /* Green for openSUSE */ | |
5a6225fd | 3505 | |
0d37b36b | 3506 | #elif defined(TARGET_GENTOO) |
0d37b36b | 3507 | |
10aa7034 LP |
3508 | if (!pretty_name) { |
3509 | if ((r = read_one_line_file("/etc/gentoo-release", &pretty_name)) < 0) { | |
0d37b36b | 3510 | |
10aa7034 LP |
3511 | if (r != -ENOENT) |
3512 | log_warning("Failed to read /etc/gentoo-release: %s", strerror(-r)); | |
6f9a471a | 3513 | } |
10aa7034 | 3514 | } |
0d37b36b | 3515 | |
10aa7034 LP |
3516 | if (!ansi_color) |
3517 | const_color = "1;34"; /* Light Blue for Gentoo */ | |
5a6225fd | 3518 | |
a338bab5 AS |
3519 | #elif defined(TARGET_ALTLINUX) |
3520 | ||
3521 | if (!pretty_name) { | |
3522 | if ((r = read_one_line_file("/etc/altlinux-release", &pretty_name)) < 0) { | |
3523 | ||
3524 | if (r != -ENOENT) | |
3525 | log_warning("Failed to read /etc/altlinux-release: %s", strerror(-r)); | |
6f9a471a | 3526 | } |
a338bab5 AS |
3527 | } |
3528 | ||
3529 | if (!ansi_color) | |
3530 | const_color = "0;36"; /* Cyan for ALTLinux */ | |
3531 | ||
3532 | ||
5a6225fd | 3533 | #elif defined(TARGET_DEBIAN) |
5a6225fd | 3534 | |
10aa7034 | 3535 | if (!pretty_name) { |
22927a36 | 3536 | char *version; |
c8bffa43 | 3537 | |
22927a36 | 3538 | if ((r = read_one_line_file("/etc/debian_version", &version)) < 0) { |
5a6225fd | 3539 | |
10aa7034 LP |
3540 | if (r != -ENOENT) |
3541 | log_warning("Failed to read /etc/debian_version: %s", strerror(-r)); | |
22927a36 | 3542 | } else { |
22927a36 MB |
3543 | pretty_name = strappend("Debian ", version); |
3544 | free(version); | |
c8bffa43 LP |
3545 | |
3546 | if (!pretty_name) | |
3547 | log_warning("Failed to allocate Debian version string."); | |
22927a36 | 3548 | } |
10aa7034 | 3549 | } |
5a6225fd | 3550 | |
10aa7034 LP |
3551 | if (!ansi_color) |
3552 | const_color = "1;31"; /* Light Red for Debian */ | |
5a6225fd | 3553 | |
274914f9 | 3554 | #elif defined(TARGET_UBUNTU) |
10aa7034 LP |
3555 | |
3556 | if ((r = parse_env_file("/etc/lsb-release", NEWLINE, | |
3557 | "DISTRIB_DESCRIPTION", &pretty_name, | |
3558 | NULL)) < 0) { | |
3559 | ||
3560 | if (r != -ENOENT) | |
3561 | log_warning("Failed to read /etc/lsb-release: %s", strerror(-r)); | |
3562 | } | |
3563 | ||
3564 | if (!ansi_color) | |
3565 | const_color = "0;33"; /* Orange/Brown for Ubuntu */ | |
3566 | ||
1de4d79b AB |
3567 | #elif defined(TARGET_MANDRIVA) |
3568 | ||
3569 | if (!pretty_name) { | |
3570 | char *s, *p; | |
3571 | ||
3572 | if ((r = read_one_line_file("/etc/mandriva-release", &s) < 0)) { | |
3573 | if (r != -ENOENT) | |
3574 | log_warning("Failed to read /etc/mandriva-release: %s", strerror(-r)); | |
3575 | } else { | |
3576 | p = strstr(s, " release "); | |
3577 | if (p) { | |
3578 | *p = '\0'; | |
3579 | p += 9; | |
3580 | p[strcspn(p, " ")] = '\0'; | |
3581 | ||
3582 | /* This corresponds to standard rc.sysinit */ | |
3583 | if (asprintf(&pretty_name, "%s\x1B[0;39m %s", s, p) > 0) | |
3584 | const_color = "1;36"; | |
3585 | else | |
3586 | log_warning("Failed to allocate Mandriva version string."); | |
3587 | } else | |
3588 | log_warning("Failed to parse /etc/mandriva-release"); | |
3589 | free(s); | |
3590 | } | |
3591 | } | |
54e4fdef | 3592 | #elif defined(TARGET_MEEGO) |
1de4d79b | 3593 | |
54e4fdef CF |
3594 | if (!pretty_name) { |
3595 | if ((r = read_one_line_file("/etc/meego-release", &pretty_name)) < 0) { | |
3596 | ||
3597 | if (r != -ENOENT) | |
3598 | log_warning("Failed to read /etc/meego-release: %s", strerror(-r)); | |
3599 | } | |
3600 | } | |
3601 | ||
3602 | if (!ansi_color) | |
3603 | const_color = "1;35"; /* Bright Magenta for MeeGo */ | |
c846ff47 | 3604 | #endif |
10aa7034 LP |
3605 | |
3606 | if (!pretty_name && !const_pretty) | |
3607 | const_pretty = "Linux"; | |
3608 | ||
3609 | if (!ansi_color && !const_color) | |
3610 | const_color = "1"; | |
3611 | ||
da71f23c | 3612 | status_printf("\nWelcome to \x1B[%sm%s\x1B[0m!\n\n", |
10aa7034 LP |
3613 | const_color ? const_color : ansi_color, |
3614 | const_pretty ? const_pretty : pretty_name); | |
86a3475b LP |
3615 | |
3616 | free(ansi_color); | |
3617 | free(pretty_name); | |
c846ff47 LP |
3618 | } |
3619 | ||
fab56fc5 LP |
3620 | char *replace_env(const char *format, char **env) { |
3621 | enum { | |
3622 | WORD, | |
c24eb49e | 3623 | CURLY, |
fab56fc5 LP |
3624 | VARIABLE |
3625 | } state = WORD; | |
3626 | ||
3627 | const char *e, *word = format; | |
3628 | char *r = NULL, *k; | |
3629 | ||
3630 | assert(format); | |
3631 | ||
3632 | for (e = format; *e; e ++) { | |
3633 | ||
3634 | switch (state) { | |
3635 | ||
3636 | case WORD: | |
3637 | if (*e == '$') | |
c24eb49e | 3638 | state = CURLY; |
fab56fc5 LP |
3639 | break; |
3640 | ||
c24eb49e LP |
3641 | case CURLY: |
3642 | if (*e == '{') { | |
fab56fc5 LP |
3643 | if (!(k = strnappend(r, word, e-word-1))) |
3644 | goto fail; | |
3645 | ||
3646 | free(r); | |
3647 | r = k; | |
3648 | ||
3649 | word = e-1; | |
3650 | state = VARIABLE; | |
3651 | ||
3652 | } else if (*e == '$') { | |
3653 | if (!(k = strnappend(r, word, e-word))) | |
3654 | goto fail; | |
3655 | ||
3656 | free(r); | |
3657 | r = k; | |
3658 | ||
3659 | word = e+1; | |
3660 | state = WORD; | |
3661 | } else | |
3662 | state = WORD; | |
3663 | break; | |
3664 | ||
3665 | case VARIABLE: | |
c24eb49e | 3666 | if (*e == '}') { |
b95cf362 | 3667 | const char *t; |
fab56fc5 | 3668 | |
b95cf362 LP |
3669 | if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) |
3670 | t = ""; | |
fab56fc5 | 3671 | |
b95cf362 LP |
3672 | if (!(k = strappend(r, t))) |
3673 | goto fail; | |
fab56fc5 | 3674 | |
b95cf362 LP |
3675 | free(r); |
3676 | r = k; | |
fab56fc5 | 3677 | |
b95cf362 | 3678 | word = e+1; |
fab56fc5 LP |
3679 | state = WORD; |
3680 | } | |
3681 | break; | |
3682 | } | |
3683 | } | |
3684 | ||
3685 | if (!(k = strnappend(r, word, e-word))) | |
3686 | goto fail; | |
3687 | ||
3688 | free(r); | |
3689 | return k; | |
3690 | ||
3691 | fail: | |
3692 | free(r); | |
3693 | return NULL; | |
3694 | } | |
3695 | ||
3696 | char **replace_env_argv(char **argv, char **env) { | |
3697 | char **r, **i; | |
c24eb49e LP |
3698 | unsigned k = 0, l = 0; |
3699 | ||
3700 | l = strv_length(argv); | |
fab56fc5 | 3701 | |
c24eb49e | 3702 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3703 | return NULL; |
3704 | ||
3705 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3706 | |
3707 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3708 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3709 | char *e; | |
3710 | char **w, **m; | |
3711 | unsigned q; | |
c24eb49e | 3712 | |
b95cf362 | 3713 | if ((e = strv_env_get(env, *i+1))) { |
c24eb49e LP |
3714 | |
3715 | if (!(m = strv_split_quoted(e))) { | |
3716 | r[k] = NULL; | |
3717 | strv_free(r); | |
3718 | return NULL; | |
3719 | } | |
b95cf362 LP |
3720 | } else |
3721 | m = NULL; | |
c24eb49e | 3722 | |
b95cf362 LP |
3723 | q = strv_length(m); |
3724 | l = l + q - 1; | |
c24eb49e | 3725 | |
b95cf362 LP |
3726 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3727 | r[k] = NULL; | |
3728 | strv_free(r); | |
3729 | strv_free(m); | |
3730 | return NULL; | |
3731 | } | |
c24eb49e | 3732 | |
b95cf362 LP |
3733 | r = w; |
3734 | if (m) { | |
c24eb49e LP |
3735 | memcpy(r + k, m, q * sizeof(char*)); |
3736 | free(m); | |
c24eb49e | 3737 | } |
b95cf362 LP |
3738 | |
3739 | k += q; | |
3740 | continue; | |
c24eb49e LP |
3741 | } |
3742 | ||
3743 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3744 | if (!(r[k++] = replace_env(*i, env))) { |
3745 | strv_free(r); | |
3746 | return NULL; | |
3747 | } | |
3748 | } | |
3749 | ||
3750 | r[k] = NULL; | |
3751 | return r; | |
3752 | } | |
3753 | ||
fa776d8e LP |
3754 | int columns(void) { |
3755 | static __thread int parsed_columns = 0; | |
3756 | const char *e; | |
3757 | ||
3758 | if (parsed_columns > 0) | |
3759 | return parsed_columns; | |
3760 | ||
3761 | if ((e = getenv("COLUMNS"))) | |
3762 | parsed_columns = atoi(e); | |
3763 | ||
3764 | if (parsed_columns <= 0) { | |
3765 | struct winsize ws; | |
3766 | zero(ws); | |
3767 | ||
9ed95f43 | 3768 | if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) >= 0) |
fa776d8e LP |
3769 | parsed_columns = ws.ws_col; |
3770 | } | |
3771 | ||
3772 | if (parsed_columns <= 0) | |
3773 | parsed_columns = 80; | |
3774 | ||
3775 | return parsed_columns; | |
3776 | } | |
3777 | ||
b4f10a5e LP |
3778 | int running_in_chroot(void) { |
3779 | struct stat a, b; | |
3780 | ||
3781 | zero(a); | |
3782 | zero(b); | |
3783 | ||
3784 | /* Only works as root */ | |
3785 | ||
3786 | if (stat("/proc/1/root", &a) < 0) | |
3787 | return -errno; | |
3788 | ||
3789 | if (stat("/", &b) < 0) | |
3790 | return -errno; | |
3791 | ||
3792 | return | |
3793 | a.st_dev != b.st_dev || | |
3794 | a.st_ino != b.st_ino; | |
3795 | } | |
3796 | ||
8fe914ec LP |
3797 | char *ellipsize(const char *s, unsigned length, unsigned percent) { |
3798 | size_t l, x; | |
3799 | char *r; | |
3800 | ||
3801 | assert(s); | |
3802 | assert(percent <= 100); | |
3803 | assert(length >= 3); | |
3804 | ||
3805 | l = strlen(s); | |
3806 | ||
3807 | if (l <= 3 || l <= length) | |
3808 | return strdup(s); | |
3809 | ||
3810 | if (!(r = new0(char, length+1))) | |
3811 | return r; | |
3812 | ||
3813 | x = (length * percent) / 100; | |
3814 | ||
3815 | if (x > length - 3) | |
3816 | x = length - 3; | |
3817 | ||
3818 | memcpy(r, s, x); | |
3819 | r[x] = '.'; | |
3820 | r[x+1] = '.'; | |
3821 | r[x+2] = '.'; | |
3822 | memcpy(r + x + 3, | |
3823 | s + l - (length - x - 3), | |
3824 | length - x - 3); | |
3825 | ||
3826 | return r; | |
3827 | } | |
3828 | ||
f6144808 LP |
3829 | int touch(const char *path) { |
3830 | int fd; | |
3831 | ||
3832 | assert(path); | |
3833 | ||
14f3c825 | 3834 | if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0) |
f6144808 LP |
3835 | return -errno; |
3836 | ||
3837 | close_nointr_nofail(fd); | |
3838 | return 0; | |
3839 | } | |
afea26ad | 3840 | |
97c4a07d | 3841 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3842 | size_t l; |
3843 | assert(s); | |
3844 | ||
3845 | if ((l = strlen(s)) < 2) | |
3846 | return strdup(s); | |
3847 | ||
97c4a07d | 3848 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3849 | return strndup(s+1, l-2); |
3850 | ||
3851 | return strdup(s); | |
3852 | } | |
3853 | ||
5f7c426e LP |
3854 | char *normalize_env_assignment(const char *s) { |
3855 | char *name, *value, *p, *r; | |
3856 | ||
3857 | p = strchr(s, '='); | |
3858 | ||
3859 | if (!p) { | |
3860 | if (!(r = strdup(s))) | |
3861 | return NULL; | |
3862 | ||
3863 | return strstrip(r); | |
3864 | } | |
3865 | ||
3866 | if (!(name = strndup(s, p - s))) | |
3867 | return NULL; | |
3868 | ||
3869 | if (!(p = strdup(p+1))) { | |
3870 | free(name); | |
3871 | return NULL; | |
3872 | } | |
3873 | ||
3874 | value = unquote(strstrip(p), QUOTES); | |
3875 | free(p); | |
3876 | ||
3877 | if (!value) { | |
5f7c426e LP |
3878 | free(name); |
3879 | return NULL; | |
3880 | } | |
3881 | ||
3882 | if (asprintf(&r, "%s=%s", name, value) < 0) | |
3883 | r = NULL; | |
3884 | ||
3885 | free(value); | |
3886 | free(name); | |
3887 | ||
3888 | return r; | |
3889 | } | |
3890 | ||
8e12a6ae | 3891 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3892 | siginfo_t dummy; |
3893 | ||
2e78aa99 | 3894 | assert(pid >= 1); |
1968a360 LP |
3895 | |
3896 | if (!status) | |
3897 | status = &dummy; | |
2e78aa99 LP |
3898 | |
3899 | for (;;) { | |
8e12a6ae LP |
3900 | zero(*status); |
3901 | ||
3902 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3903 | |
3904 | if (errno == EINTR) | |
3905 | continue; | |
3906 | ||
3907 | return -errno; | |
3908 | } | |
3909 | ||
3910 | return 0; | |
3911 | } | |
3912 | } | |
3913 | ||
97c4a07d LP |
3914 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3915 | int r; | |
3916 | siginfo_t status; | |
3917 | ||
3918 | assert(name); | |
3919 | assert(pid > 1); | |
3920 | ||
3921 | if ((r = wait_for_terminate(pid, &status)) < 0) { | |
3922 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); | |
3923 | return r; | |
3924 | } | |
3925 | ||
3926 | if (status.si_code == CLD_EXITED) { | |
3927 | if (status.si_status != 0) { | |
3928 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3929 | return status.si_status; |
97c4a07d LP |
3930 | } |
3931 | ||
3932 | log_debug("%s succeeded.", name); | |
3933 | return 0; | |
3934 | ||
3935 | } else if (status.si_code == CLD_KILLED || | |
3936 | status.si_code == CLD_DUMPED) { | |
3937 | ||
3938 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3939 | return -EPROTO; | |
3940 | } | |
3941 | ||
3942 | log_warning("%s failed due to unknown reason.", name); | |
3943 | return -EPROTO; | |
3944 | ||
3945 | } | |
3946 | ||
3c14d26c | 3947 | void freeze(void) { |
720ce21d LP |
3948 | |
3949 | /* Make sure nobody waits for us on a socket anymore */ | |
3950 | close_all_fds(NULL, 0); | |
3951 | ||
c29597a1 LP |
3952 | sync(); |
3953 | ||
3c14d26c LP |
3954 | for (;;) |
3955 | pause(); | |
3956 | } | |
3957 | ||
00dc5d76 LP |
3958 | bool null_or_empty(struct stat *st) { |
3959 | assert(st); | |
3960 | ||
3961 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3962 | return true; | |
3963 | ||
c8f26f42 | 3964 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3965 | return true; |
3966 | ||
3967 | return false; | |
3968 | } | |
3969 | ||
83096483 LP |
3970 | int null_or_empty_path(const char *fn) { |
3971 | struct stat st; | |
3972 | ||
3973 | assert(fn); | |
3974 | ||
3975 | if (stat(fn, &st) < 0) | |
3976 | return -errno; | |
3977 | ||
3978 | return null_or_empty(&st); | |
3979 | } | |
3980 | ||
a247755d | 3981 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3982 | int nfd; |
3983 | DIR *d; | |
3984 | ||
3985 | if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0) | |
3986 | return NULL; | |
3987 | ||
3988 | if (!(d = fdopendir(nfd))) { | |
3989 | close_nointr_nofail(nfd); | |
3990 | return NULL; | |
3991 | } | |
3992 | ||
3993 | return d; | |
3b63d2d3 LP |
3994 | } |
3995 | ||
8a0867d6 LP |
3996 | int signal_from_string_try_harder(const char *s) { |
3997 | int signo; | |
3998 | assert(s); | |
3999 | ||
4000 | if ((signo = signal_from_string(s)) <= 0) | |
4001 | if (startswith(s, "SIG")) | |
4002 | return signal_from_string(s+3); | |
4003 | ||
4004 | return signo; | |
4005 | } | |
4006 | ||
10717a1a LP |
4007 | void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { |
4008 | ||
4009 | assert(f); | |
4010 | assert(name); | |
4011 | assert(t); | |
4012 | ||
4013 | if (!dual_timestamp_is_set(t)) | |
4014 | return; | |
4015 | ||
4016 | fprintf(f, "%s=%llu %llu\n", | |
4017 | name, | |
4018 | (unsigned long long) t->realtime, | |
4019 | (unsigned long long) t->monotonic); | |
4020 | } | |
4021 | ||
799fd0fd | 4022 | void dual_timestamp_deserialize(const char *value, dual_timestamp *t) { |
10717a1a LP |
4023 | unsigned long long a, b; |
4024 | ||
10717a1a LP |
4025 | assert(value); |
4026 | assert(t); | |
4027 | ||
4028 | if (sscanf(value, "%lli %llu", &a, &b) != 2) | |
4029 | log_debug("Failed to parse finish timestamp value %s", value); | |
4030 | else { | |
4031 | t->realtime = a; | |
4032 | t->monotonic = b; | |
4033 | } | |
4034 | } | |
4035 | ||
e23a0ce8 LP |
4036 | char *fstab_node_to_udev_node(const char *p) { |
4037 | char *dn, *t, *u; | |
4038 | int r; | |
4039 | ||
4040 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
4041 | * UTF8 chars unescaped */ | |
4042 | ||
4043 | if (startswith(p, "LABEL=")) { | |
4044 | ||
4045 | if (!(u = unquote(p+6, "\"\'"))) | |
4046 | return NULL; | |
4047 | ||
4048 | t = xescape(u, "/ "); | |
4049 | free(u); | |
4050 | ||
4051 | if (!t) | |
4052 | return NULL; | |
4053 | ||
4054 | r = asprintf(&dn, "/dev/disk/by-label/%s", t); | |
4055 | free(t); | |
4056 | ||
4057 | if (r < 0) | |
4058 | return NULL; | |
4059 | ||
4060 | return dn; | |
4061 | } | |
4062 | ||
4063 | if (startswith(p, "UUID=")) { | |
4064 | ||
4065 | if (!(u = unquote(p+5, "\"\'"))) | |
4066 | return NULL; | |
4067 | ||
4068 | t = xescape(u, "/ "); | |
4069 | free(u); | |
4070 | ||
4071 | if (!t) | |
4072 | return NULL; | |
4073 | ||
0058d7b9 | 4074 | r = asprintf(&dn, "/dev/disk/by-uuid/%s", t); |
e23a0ce8 LP |
4075 | free(t); |
4076 | ||
4077 | if (r < 0) | |
4078 | return NULL; | |
4079 | ||
4080 | return dn; | |
4081 | } | |
4082 | ||
4083 | return strdup(p); | |
4084 | } | |
4085 | ||
e9ddabc2 LP |
4086 | void filter_environ(const char *prefix) { |
4087 | int i, j; | |
4088 | assert(prefix); | |
4089 | ||
4090 | if (!environ) | |
4091 | return; | |
4092 | ||
4093 | for (i = 0, j = 0; environ[i]; i++) { | |
4094 | ||
4095 | if (startswith(environ[i], prefix)) | |
4096 | continue; | |
4097 | ||
4098 | environ[j++] = environ[i]; | |
4099 | } | |
4100 | ||
4101 | environ[j] = NULL; | |
4102 | } | |
4103 | ||
f212ac12 LP |
4104 | bool tty_is_vc(const char *tty) { |
4105 | assert(tty); | |
4106 | ||
4107 | if (startswith(tty, "/dev/")) | |
4108 | tty += 5; | |
4109 | ||
98a28fef LP |
4110 | return vtnr_from_tty(tty) >= 0; |
4111 | } | |
4112 | ||
4113 | int vtnr_from_tty(const char *tty) { | |
4114 | int i, r; | |
4115 | ||
4116 | assert(tty); | |
4117 | ||
4118 | if (startswith(tty, "/dev/")) | |
4119 | tty += 5; | |
4120 | ||
4121 | if (!startswith(tty, "tty") ) | |
4122 | return -EINVAL; | |
4123 | ||
4124 | if (tty[3] < '0' || tty[3] > '9') | |
4125 | return -EINVAL; | |
4126 | ||
4127 | r = safe_atoi(tty+3, &i); | |
4128 | if (r < 0) | |
4129 | return r; | |
4130 | ||
4131 | if (i < 0 || i > 63) | |
4132 | return -EINVAL; | |
4133 | ||
4134 | return i; | |
f212ac12 LP |
4135 | } |
4136 | ||
e3aa71c3 | 4137 | const char *default_term_for_tty(const char *tty) { |
3030ccd7 LP |
4138 | char *active = NULL; |
4139 | const char *term; | |
4140 | ||
e3aa71c3 LP |
4141 | assert(tty); |
4142 | ||
4143 | if (startswith(tty, "/dev/")) | |
4144 | tty += 5; | |
4145 | ||
3030ccd7 LP |
4146 | /* Resolve where /dev/console is pointing when determining |
4147 | * TERM */ | |
4148 | if (streq(tty, "console")) | |
4149 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { | |
079a09fb LP |
4150 | /* If multiple log outputs are configured the |
4151 | * last one is what /dev/console points to */ | |
4152 | if ((tty = strrchr(active, ' '))) | |
4153 | tty++; | |
4154 | else | |
4155 | tty = active; | |
3030ccd7 LP |
4156 | } |
4157 | ||
f212ac12 | 4158 | term = tty_is_vc(tty) ? "TERM=linux" : "TERM=vt100"; |
3030ccd7 | 4159 | free(active); |
e3aa71c3 | 4160 | |
3030ccd7 | 4161 | return term; |
e3aa71c3 LP |
4162 | } |
4163 | ||
07faed4f LP |
4164 | /* Returns a short identifier for the various VM implementations */ |
4165 | int detect_vm(const char **id) { | |
46a08e38 LP |
4166 | |
4167 | #if defined(__i386__) || defined(__x86_64__) | |
4168 | ||
4169 | /* Both CPUID and DMI are x86 specific interfaces... */ | |
4170 | ||
721bca57 | 4171 | static const char *const dmi_vendors[] = { |
46a08e38 LP |
4172 | "/sys/class/dmi/id/sys_vendor", |
4173 | "/sys/class/dmi/id/board_vendor", | |
4174 | "/sys/class/dmi/id/bios_vendor" | |
4175 | }; | |
4176 | ||
4e08da90 | 4177 | static const char dmi_vendor_table[] = |
07faed4f LP |
4178 | "QEMU\0" "qemu\0" |
4179 | /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */ | |
4180 | "VMware\0" "vmware\0" | |
4181 | "VMW\0" "vmware\0" | |
4182 | "Microsoft Corporation\0" "microsoft\0" | |
4183 | "innotek GmbH\0" "oracle\0" | |
4184 | "Xen\0" "xen\0" | |
34df5a34 | 4185 | "Bochs\0" "bochs\0"; |
07faed4f | 4186 | |
4e08da90 | 4187 | static const char cpuid_vendor_table[] = |
07faed4f LP |
4188 | "XenVMMXenVMM\0" "xen\0" |
4189 | "KVMKVMKVM\0" "kvm\0" | |
4190 | /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */ | |
4191 | "VMwareVMware\0" "vmware\0" | |
4192 | /* http://msdn.microsoft.com/en-us/library/ff542428.aspx */ | |
34df5a34 | 4193 | "Microsoft Hv\0" "microsoft\0"; |
07faed4f LP |
4194 | |
4195 | uint32_t eax, ecx; | |
46a08e38 LP |
4196 | union { |
4197 | uint32_t sig32[3]; | |
4198 | char text[13]; | |
4199 | } sig; | |
46a08e38 | 4200 | unsigned i; |
07faed4f | 4201 | const char *j, *k; |
721bca57 | 4202 | bool hypervisor; |
46a08e38 LP |
4203 | |
4204 | /* http://lwn.net/Articles/301888/ */ | |
4205 | zero(sig); | |
4206 | ||
46a08e38 LP |
4207 | #if defined (__i386__) |
4208 | #define REG_a "eax" | |
4209 | #define REG_b "ebx" | |
4210 | #elif defined (__amd64__) | |
4211 | #define REG_a "rax" | |
4212 | #define REG_b "rbx" | |
4213 | #endif | |
4214 | ||
07faed4f LP |
4215 | /* First detect whether there is a hypervisor */ |
4216 | eax = 1; | |
46a08e38 LP |
4217 | __asm__ __volatile__ ( |
4218 | /* ebx/rbx is being used for PIC! */ | |
4219 | " push %%"REG_b" \n\t" | |
4220 | " cpuid \n\t" | |
46a08e38 LP |
4221 | " pop %%"REG_b" \n\t" |
4222 | ||
07faed4f | 4223 | : "=a" (eax), "=c" (ecx) |
46a08e38 LP |
4224 | : "0" (eax) |
4225 | ); | |
4226 | ||
ec195f55 | 4227 | hypervisor = !!(ecx & 0x80000000U); |
721bca57 LP |
4228 | |
4229 | if (hypervisor) { | |
07faed4f LP |
4230 | |
4231 | /* There is a hypervisor, see what it is */ | |
4232 | eax = 0x40000000U; | |
4233 | __asm__ __volatile__ ( | |
4234 | /* ebx/rbx is being used for PIC! */ | |
4235 | " push %%"REG_b" \n\t" | |
4236 | " cpuid \n\t" | |
4237 | " mov %%ebx, %1 \n\t" | |
4238 | " pop %%"REG_b" \n\t" | |
4239 | ||
4240 | : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2]) | |
4241 | : "0" (eax) | |
4242 | ); | |
4243 | ||
4244 | NULSTR_FOREACH_PAIR(j, k, cpuid_vendor_table) | |
4245 | if (streq(sig.text, j)) { | |
4246 | ||
4247 | if (id) | |
4248 | *id = k; | |
4249 | ||
4250 | return 1; | |
4251 | } | |
721bca57 | 4252 | } |
07faed4f | 4253 | |
721bca57 LP |
4254 | for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) { |
4255 | char *s; | |
4256 | int r; | |
4257 | const char *found = NULL; | |
4258 | ||
4259 | if ((r = read_one_line_file(dmi_vendors[i], &s)) < 0) { | |
4260 | if (r != -ENOENT) | |
4261 | return r; | |
4262 | ||
4263 | continue; | |
4264 | } | |
4265 | ||
4266 | NULSTR_FOREACH_PAIR(j, k, dmi_vendor_table) | |
4267 | if (startswith(s, j)) | |
4268 | found = k; | |
4269 | free(s); | |
4270 | ||
4271 | if (found) { | |
4272 | if (id) | |
4273 | *id = found; | |
4274 | ||
4275 | return 1; | |
4276 | } | |
4277 | } | |
4278 | ||
4279 | if (hypervisor) { | |
07faed4f LP |
4280 | if (id) |
4281 | *id = "other"; | |
4282 | ||
4283 | return 1; | |
4284 | } | |
46a08e38 | 4285 | |
721bca57 | 4286 | #endif |
07faed4f LP |
4287 | return 0; |
4288 | } | |
4289 | ||
ef2df9f4 | 4290 | int detect_container(const char **id) { |
f9b9232b LP |
4291 | FILE *f; |
4292 | ||
ef2df9f4 LP |
4293 | /* Unfortunately many of these operations require root access |
4294 | * in one way or another */ | |
f9b9232b | 4295 | |
ef2df9f4 LP |
4296 | if (geteuid() != 0) |
4297 | return -EPERM; | |
4298 | ||
4299 | if (running_in_chroot() > 0) { | |
f9b9232b LP |
4300 | |
4301 | if (id) | |
ef2df9f4 | 4302 | *id = "chroot"; |
f9b9232b LP |
4303 | |
4304 | return 1; | |
4305 | } | |
07faed4f | 4306 | |
ef2df9f4 LP |
4307 | /* /proc/vz exists in container and outside of the container, |
4308 | * /proc/bc only outside of the container. */ | |
4309 | if (access("/proc/vz", F_OK) >= 0 && | |
4310 | access("/proc/bc", F_OK) < 0) { | |
07faed4f | 4311 | |
ef2df9f4 LP |
4312 | if (id) |
4313 | *id = "openvz"; | |
4314 | ||
4315 | return 1; | |
f9b9232b | 4316 | } |
07faed4f | 4317 | |
ccaa6149 | 4318 | if ((f = fopen("/proc/self/cgroup", "re"))) { |
f9b9232b LP |
4319 | |
4320 | for (;;) { | |
4321 | char line[LINE_MAX], *p; | |
4322 | ||
4323 | if (!fgets(line, sizeof(line), f)) | |
4324 | break; | |
4325 | ||
4326 | if (!(p = strchr(strstrip(line), ':'))) | |
4327 | continue; | |
4328 | ||
4329 | if (strncmp(p, ":ns:", 4)) | |
4330 | continue; | |
4331 | ||
4332 | if (!streq(p, ":ns:/")) { | |
4333 | fclose(f); | |
4334 | ||
ef2df9f4 | 4335 | if (id) |
28cf382a | 4336 | *id = "pidns"; |
ef2df9f4 LP |
4337 | |
4338 | return 1; | |
f9b9232b LP |
4339 | } |
4340 | } | |
4341 | ||
4342 | fclose(f); | |
07faed4f LP |
4343 | } |
4344 | ||
ef2df9f4 LP |
4345 | return 0; |
4346 | } | |
4347 | ||
4348 | /* Returns a short identifier for the various VM/container implementations */ | |
4349 | int detect_virtualization(const char **id) { | |
4350 | static __thread const char *cached_id = NULL; | |
4351 | const char *_id; | |
4352 | int r; | |
4353 | ||
4354 | if (cached_id) { | |
4355 | ||
4356 | if (cached_id == (const char*) -1) | |
4357 | return 0; | |
4358 | ||
4359 | if (id) | |
4360 | *id = cached_id; | |
4361 | ||
4362 | return 1; | |
f9b9232b | 4363 | } |
07faed4f | 4364 | |
ef2df9f4 LP |
4365 | if ((r = detect_container(&_id)) != 0) |
4366 | goto finish; | |
4367 | ||
f9b9232b | 4368 | r = detect_vm(&_id); |
07faed4f | 4369 | |
f9b9232b | 4370 | finish: |
ef2df9f4 | 4371 | if (r > 0) { |
f9b9232b | 4372 | cached_id = _id; |
07faed4f | 4373 | |
ef2df9f4 LP |
4374 | if (id) |
4375 | *id = _id; | |
4376 | } else if (r == 0) | |
4377 | cached_id = (const char*) -1; | |
f9b9232b LP |
4378 | |
4379 | return r; | |
46a08e38 LP |
4380 | } |
4381 | ||
fb19a739 LP |
4382 | bool dirent_is_file(struct dirent *de) { |
4383 | assert(de); | |
4384 | ||
4385 | if (ignore_file(de->d_name)) | |
4386 | return false; | |
4387 | ||
4388 | if (de->d_type != DT_REG && | |
4389 | de->d_type != DT_LNK && | |
4390 | de->d_type != DT_UNKNOWN) | |
4391 | return false; | |
4392 | ||
4393 | return true; | |
4394 | } | |
4395 | ||
83cc030f LP |
4396 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
4397 | DIR *_d = NULL; | |
4398 | struct dirent *de; | |
4399 | Hashmap *pids = NULL; | |
4400 | ||
4401 | assert(directory); | |
4402 | ||
4403 | /* Executes all binaries in a directory in parallel and waits | |
4404 | * until all they all finished. */ | |
4405 | ||
4406 | if (!d) { | |
4407 | if (!(_d = opendir(directory))) { | |
4408 | ||
4409 | if (errno == ENOENT) | |
4410 | return; | |
4411 | ||
4412 | log_error("Failed to enumerate directory %s: %m", directory); | |
4413 | return; | |
4414 | } | |
4415 | ||
4416 | d = _d; | |
4417 | } | |
4418 | ||
4419 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
4420 | log_error("Failed to allocate set."); | |
4421 | goto finish; | |
4422 | } | |
4423 | ||
4424 | while ((de = readdir(d))) { | |
4425 | char *path; | |
4426 | pid_t pid; | |
4427 | int k; | |
4428 | ||
fb19a739 | 4429 | if (!dirent_is_file(de)) |
83cc030f LP |
4430 | continue; |
4431 | ||
4432 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
4433 | log_error("Out of memory"); | |
4434 | continue; | |
4435 | } | |
4436 | ||
4437 | if ((pid = fork()) < 0) { | |
4438 | log_error("Failed to fork: %m"); | |
4439 | free(path); | |
4440 | continue; | |
4441 | } | |
4442 | ||
4443 | if (pid == 0) { | |
4444 | char *_argv[2]; | |
4445 | /* Child */ | |
4446 | ||
4447 | if (!argv) { | |
4448 | _argv[0] = path; | |
4449 | _argv[1] = NULL; | |
4450 | argv = _argv; | |
4451 | } else | |
4452 | if (!argv[0]) | |
4453 | argv[0] = path; | |
4454 | ||
4455 | execv(path, argv); | |
4456 | ||
4457 | log_error("Failed to execute %s: %m", path); | |
4458 | _exit(EXIT_FAILURE); | |
4459 | } | |
4460 | ||
4461 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
4462 | ||
4463 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
4464 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
4465 | free(path); | |
4466 | } | |
4467 | } | |
4468 | ||
4469 | while (!hashmap_isempty(pids)) { | |
4470 | siginfo_t si; | |
4471 | char *path; | |
4472 | ||
4473 | zero(si); | |
4474 | if (waitid(P_ALL, 0, &si, WEXITED) < 0) { | |
4475 | ||
4476 | if (errno == EINTR) | |
4477 | continue; | |
4478 | ||
4479 | log_error("waitid() failed: %m"); | |
4480 | goto finish; | |
4481 | } | |
4482 | ||
4483 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
4484 | if (!is_clean_exit(si.si_code, si.si_status)) { | |
4485 | if (si.si_code == CLD_EXITED) | |
4486 | log_error("%s exited with exit status %i.", path, si.si_status); | |
4487 | else | |
4488 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
4489 | } else | |
4490 | log_debug("%s exited successfully.", path); | |
4491 | ||
4492 | free(path); | |
4493 | } | |
4494 | } | |
4495 | ||
4496 | finish: | |
4497 | if (_d) | |
4498 | closedir(_d); | |
4499 | ||
4500 | if (pids) | |
4501 | hashmap_free_free(pids); | |
4502 | } | |
4503 | ||
430c18ed LP |
4504 | int kill_and_sigcont(pid_t pid, int sig) { |
4505 | int r; | |
4506 | ||
4507 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4508 | ||
4509 | if (r >= 0) | |
4510 | kill(pid, SIGCONT); | |
4511 | ||
4512 | return r; | |
4513 | } | |
4514 | ||
05feefe0 LP |
4515 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4516 | const char *i; | |
4517 | ||
4518 | if (!nulstr) | |
4519 | return false; | |
4520 | ||
4521 | NULSTR_FOREACH(i, nulstr) | |
4522 | if (streq(i, needle)) | |
4523 | return true; | |
4524 | ||
4525 | return false; | |
4526 | } | |
4527 | ||
6faa1114 | 4528 | bool plymouth_running(void) { |
9408a2d2 | 4529 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4530 | } |
4531 | ||
7c3b203c LP |
4532 | void parse_syslog_priority(char **p, int *priority) { |
4533 | int a = 0, b = 0, c = 0; | |
4534 | int k; | |
4535 | ||
4536 | assert(p); | |
4537 | assert(*p); | |
4538 | assert(priority); | |
4539 | ||
4540 | if ((*p)[0] != '<') | |
4541 | return; | |
4542 | ||
4543 | if (!strchr(*p, '>')) | |
4544 | return; | |
4545 | ||
4546 | if ((*p)[2] == '>') { | |
4547 | c = undecchar((*p)[1]); | |
4548 | k = 3; | |
4549 | } else if ((*p)[3] == '>') { | |
4550 | b = undecchar((*p)[1]); | |
4551 | c = undecchar((*p)[2]); | |
4552 | k = 4; | |
4553 | } else if ((*p)[4] == '>') { | |
4554 | a = undecchar((*p)[1]); | |
4555 | b = undecchar((*p)[2]); | |
4556 | c = undecchar((*p)[3]); | |
4557 | k = 5; | |
4558 | } else | |
4559 | return; | |
4560 | ||
4561 | if (a < 0 || b < 0 || c < 0) | |
4562 | return; | |
4563 | ||
4564 | *priority = a*100+b*10+c; | |
4565 | *p += k; | |
4566 | } | |
4567 | ||
ac123445 LP |
4568 | int have_effective_cap(int value) { |
4569 | cap_t cap; | |
4570 | cap_flag_value_t fv; | |
4571 | int r; | |
4572 | ||
4573 | if (!(cap = cap_get_proc())) | |
4574 | return -errno; | |
4575 | ||
4576 | if (cap_get_flag(cap, value, CAP_EFFECTIVE, &fv) < 0) | |
4577 | r = -errno; | |
4578 | else | |
4579 | r = fv == CAP_SET; | |
4580 | ||
4581 | cap_free(cap); | |
4582 | return r; | |
4583 | } | |
4584 | ||
9beb3f4d LP |
4585 | char* strshorten(char *s, size_t l) { |
4586 | assert(s); | |
4587 | ||
4588 | if (l < strlen(s)) | |
4589 | s[l] = 0; | |
4590 | ||
4591 | return s; | |
4592 | } | |
4593 | ||
4594 | static bool hostname_valid_char(char c) { | |
4595 | return | |
4596 | (c >= 'a' && c <= 'z') || | |
4597 | (c >= 'A' && c <= 'Z') || | |
4598 | (c >= '0' && c <= '9') || | |
4599 | c == '-' || | |
4600 | c == '_' || | |
4601 | c == '.'; | |
4602 | } | |
4603 | ||
4604 | bool hostname_is_valid(const char *s) { | |
4605 | const char *p; | |
4606 | ||
4607 | if (isempty(s)) | |
4608 | return false; | |
4609 | ||
4610 | for (p = s; *p; p++) | |
4611 | if (!hostname_valid_char(*p)) | |
4612 | return false; | |
4613 | ||
4614 | if (p-s > HOST_NAME_MAX) | |
4615 | return false; | |
4616 | ||
4617 | return true; | |
4618 | } | |
4619 | ||
4620 | char* hostname_cleanup(char *s) { | |
4621 | char *p, *d; | |
4622 | ||
4623 | for (p = s, d = s; *p; p++) | |
4624 | if ((*p >= 'a' && *p <= 'z') || | |
4625 | (*p >= 'A' && *p <= 'Z') || | |
4626 | (*p >= '0' && *p <= '9') || | |
4627 | *p == '-' || | |
4628 | *p == '_' || | |
4629 | *p == '.') | |
4630 | *(d++) = *p; | |
4631 | ||
4632 | *d = 0; | |
4633 | ||
4634 | strshorten(s, HOST_NAME_MAX); | |
4635 | return s; | |
4636 | } | |
4637 | ||
1325aa42 LP |
4638 | int pipe_eof(int fd) { |
4639 | struct pollfd pollfd; | |
4640 | int r; | |
4641 | ||
4642 | zero(pollfd); | |
4643 | pollfd.fd = fd; | |
4644 | pollfd.events = POLLIN|POLLHUP; | |
4645 | ||
4646 | r = poll(&pollfd, 1, 0); | |
4647 | if (r < 0) | |
4648 | return -errno; | |
4649 | ||
4650 | if (r == 0) | |
4651 | return 0; | |
4652 | ||
4653 | return pollfd.revents & POLLHUP; | |
4654 | } | |
4655 | ||
5a3ab509 LP |
4656 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4657 | FILE *f; | |
4658 | char *t; | |
4659 | const char *fn; | |
4660 | size_t k; | |
4661 | int fd; | |
4662 | ||
4663 | assert(path); | |
4664 | assert(_f); | |
4665 | assert(_temp_path); | |
4666 | ||
4667 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4668 | if (!t) | |
4669 | return -ENOMEM; | |
4670 | ||
4671 | fn = file_name_from_path(path); | |
4672 | k = fn-path; | |
4673 | memcpy(t, path, k); | |
4674 | t[k] = '.'; | |
4675 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4676 | ||
4677 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4678 | if (fd < 0) { | |
4679 | free(t); | |
4680 | return -errno; | |
4681 | } | |
4682 | ||
4683 | f = fdopen(fd, "we"); | |
4684 | if (!f) { | |
4685 | unlink(t); | |
4686 | free(t); | |
4687 | return -errno; | |
4688 | } | |
4689 | ||
4690 | *_f = f; | |
4691 | *_temp_path = t; | |
4692 | ||
4693 | return 0; | |
4694 | } | |
4695 | ||
6ea832a2 | 4696 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4697 | assert(fd >= 0); |
4698 | ||
6ea832a2 LP |
4699 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4700 | return -errno; | |
4701 | ||
4702 | return 0; | |
4703 | } | |
4704 | ||
4705 | int terminal_vhangup(const char *name) { | |
4706 | int fd, r; | |
4707 | ||
4708 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4709 | if (fd < 0) | |
4710 | return fd; | |
4711 | ||
4712 | r = terminal_vhangup_fd(fd); | |
4713 | close_nointr_nofail(fd); | |
4714 | ||
4715 | return r; | |
4716 | } | |
4717 | ||
4718 | int vt_disallocate(const char *name) { | |
4719 | int fd, r; | |
4720 | unsigned u; | |
6ea832a2 LP |
4721 | |
4722 | /* Deallocate the VT if possible. If not possible | |
4723 | * (i.e. because it is the active one), at least clear it | |
4724 | * entirely (including the scrollback buffer) */ | |
4725 | ||
b83bc4e9 LP |
4726 | if (!startswith(name, "/dev/")) |
4727 | return -EINVAL; | |
4728 | ||
4729 | if (!tty_is_vc(name)) { | |
4730 | /* So this is not a VT. I guess we cannot deallocate | |
4731 | * it then. But let's at least clear the screen */ | |
4732 | ||
4733 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4734 | if (fd < 0) | |
4735 | return fd; | |
4736 | ||
8585357a LP |
4737 | loop_write(fd, |
4738 | "\033[r" /* clear scrolling region */ | |
4739 | "\033[H" /* move home */ | |
4740 | "\033[2J", /* clear screen */ | |
4741 | 10, false); | |
b83bc4e9 LP |
4742 | close_nointr_nofail(fd); |
4743 | ||
4744 | return 0; | |
4745 | } | |
6ea832a2 LP |
4746 | |
4747 | if (!startswith(name, "/dev/tty")) | |
4748 | return -EINVAL; | |
4749 | ||
4750 | r = safe_atou(name+8, &u); | |
4751 | if (r < 0) | |
4752 | return r; | |
4753 | ||
4754 | if (u <= 0) | |
b83bc4e9 | 4755 | return -EINVAL; |
6ea832a2 | 4756 | |
b83bc4e9 | 4757 | /* Try to deallocate */ |
6ea832a2 LP |
4758 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4759 | if (fd < 0) | |
4760 | return fd; | |
4761 | ||
4762 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4763 | close_nointr_nofail(fd); |
6ea832a2 | 4764 | |
b83bc4e9 LP |
4765 | if (r >= 0) |
4766 | return 0; | |
6ea832a2 | 4767 | |
b83bc4e9 | 4768 | if (errno != EBUSY) |
6ea832a2 | 4769 | return -errno; |
6ea832a2 | 4770 | |
b83bc4e9 LP |
4771 | /* Couldn't deallocate, so let's clear it fully with |
4772 | * scrollback */ | |
4773 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4774 | if (fd < 0) |
b83bc4e9 | 4775 | return fd; |
6ea832a2 | 4776 | |
8585357a LP |
4777 | loop_write(fd, |
4778 | "\033[r" /* clear scrolling region */ | |
4779 | "\033[H" /* move home */ | |
4780 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4781 | 10, false); | |
b83bc4e9 | 4782 | close_nointr_nofail(fd); |
6ea832a2 | 4783 | |
b83bc4e9 | 4784 | return 0; |
6ea832a2 LP |
4785 | } |
4786 | ||
db1413d7 KS |
4787 | |
4788 | static int file_is_conf(const struct dirent *d, const char *suffix) { | |
4789 | assert(d); | |
4790 | ||
4791 | if (ignore_file(d->d_name)) | |
4792 | return 0; | |
4793 | ||
4794 | if (d->d_type != DT_REG && | |
4795 | d->d_type != DT_LNK && | |
4796 | d->d_type != DT_UNKNOWN) | |
4797 | return 0; | |
4798 | ||
4799 | return endswith(d->d_name, suffix); | |
4800 | } | |
4801 | ||
4802 | static int files_add(Hashmap *h, const char *path, const char *suffix) { | |
4803 | DIR *dir; | |
f782b8d0 | 4804 | struct dirent buffer, *de; |
db1413d7 KS |
4805 | int r = 0; |
4806 | ||
4807 | dir = opendir(path); | |
4808 | if (!dir) { | |
4809 | if (errno == ENOENT) | |
4810 | return 0; | |
4811 | return -errno; | |
4812 | } | |
4813 | ||
f782b8d0 LP |
4814 | for (;;) { |
4815 | int k; | |
223a3558 | 4816 | char *p, *f; |
f782b8d0 LP |
4817 | |
4818 | k = readdir_r(dir, &buffer, &de); | |
4819 | if (k != 0) { | |
4820 | r = -k; | |
4821 | goto finish; | |
4822 | } | |
4823 | ||
4824 | if (!de) | |
4825 | break; | |
db1413d7 KS |
4826 | |
4827 | if (!file_is_conf(de, suffix)) | |
4828 | continue; | |
4829 | ||
223a3558 | 4830 | if (asprintf(&p, "%s/%s", path, de->d_name) < 0) { |
db1413d7 KS |
4831 | r = -ENOMEM; |
4832 | goto finish; | |
4833 | } | |
4834 | ||
223a3558 KS |
4835 | f = canonicalize_file_name(p); |
4836 | if (!f) { | |
4837 | log_error("Failed to canonicalize file name '%s': %m", p); | |
4838 | free(p); | |
4839 | continue; | |
4840 | } | |
4841 | free(p); | |
4842 | ||
db1413d7 | 4843 | log_debug("found: %s\n", f); |
f782b8d0 | 4844 | if (hashmap_put(h, file_name_from_path(f), f) <= 0) |
db1413d7 KS |
4845 | free(f); |
4846 | } | |
4847 | ||
4848 | finish: | |
4849 | closedir(dir); | |
4850 | return r; | |
4851 | } | |
4852 | ||
4853 | static int base_cmp(const void *a, const void *b) { | |
4854 | const char *s1, *s2; | |
4855 | ||
4856 | s1 = *(char * const *)a; | |
4857 | s2 = *(char * const *)b; | |
4858 | return strcmp(file_name_from_path(s1), file_name_from_path(s2)); | |
4859 | } | |
4860 | ||
44143309 | 4861 | int conf_files_list(char ***strv, const char *suffix, const char *dir, ...) { |
223a3558 KS |
4862 | Hashmap *fh = NULL; |
4863 | char **dirs = NULL; | |
db1413d7 | 4864 | char **files = NULL; |
223a3558 | 4865 | char **p; |
db1413d7 | 4866 | va_list ap; |
44143309 | 4867 | int r = 0; |
db1413d7 | 4868 | |
223a3558 KS |
4869 | va_start(ap, dir); |
4870 | dirs = strv_new_ap(dir, ap); | |
4871 | va_end(ap); | |
4872 | if (!dirs) { | |
4873 | r = -ENOMEM; | |
4874 | goto finish; | |
4875 | } | |
4876 | if (!strv_path_canonicalize(dirs)) { | |
4877 | r = -ENOMEM; | |
4878 | goto finish; | |
4879 | } | |
4880 | if (!strv_uniq(dirs)) { | |
4881 | r = -ENOMEM; | |
4882 | goto finish; | |
4883 | } | |
4884 | ||
db1413d7 KS |
4885 | fh = hashmap_new(string_hash_func, string_compare_func); |
4886 | if (!fh) { | |
44143309 | 4887 | r = -ENOMEM; |
db1413d7 KS |
4888 | goto finish; |
4889 | } | |
4890 | ||
223a3558 KS |
4891 | STRV_FOREACH(p, dirs) { |
4892 | if (files_add(fh, *p, suffix) < 0) { | |
db1413d7 | 4893 | log_error("Failed to search for files."); |
44143309 | 4894 | r = -EINVAL; |
db1413d7 KS |
4895 | goto finish; |
4896 | } | |
db1413d7 | 4897 | } |
db1413d7 KS |
4898 | |
4899 | files = hashmap_get_strv(fh); | |
4900 | if (files == NULL) { | |
4901 | log_error("Failed to compose list of files."); | |
44143309 | 4902 | r = -ENOMEM; |
db1413d7 KS |
4903 | goto finish; |
4904 | } | |
4905 | ||
4906 | qsort(files, hashmap_size(fh), sizeof(char *), base_cmp); | |
8d0e38a2 | 4907 | |
db1413d7 | 4908 | finish: |
223a3558 | 4909 | strv_free(dirs); |
db1413d7 | 4910 | hashmap_free(fh); |
44143309 KS |
4911 | *strv = files; |
4912 | return r; | |
db1413d7 | 4913 | } |
7948c4df | 4914 | |
2076cf88 | 4915 | int hwclock_is_localtime(void) { |
7948c4df | 4916 | FILE *f; |
7948c4df KS |
4917 | bool local = false; |
4918 | ||
4919 | /* | |
4920 | * The third line of adjtime is "UTC" or "LOCAL" or nothing. | |
4921 | * # /etc/adjtime | |
2076cf88 | 4922 | * 0.0 0 0 |
7948c4df KS |
4923 | * 0 |
4924 | * UTC | |
4925 | */ | |
4926 | f = fopen("/etc/adjtime", "re"); | |
4927 | if (f) { | |
2076cf88 LP |
4928 | char line[LINE_MAX]; |
4929 | bool b; | |
4930 | ||
4931 | b = fgets(line, sizeof(line), f) && | |
4932 | fgets(line, sizeof(line), f) && | |
4933 | fgets(line, sizeof(line), f); | |
4934 | ||
7948c4df | 4935 | fclose(f); |
2076cf88 LP |
4936 | |
4937 | if (!b) | |
4938 | return -EIO; | |
4939 | ||
4940 | ||
4941 | truncate_nl(line); | |
4942 | local = streq(line, "LOCAL"); | |
4943 | ||
4944 | } else if (errno != -ENOENT) | |
4945 | return -errno; | |
4946 | ||
7948c4df KS |
4947 | return local; |
4948 | } | |
4949 | ||
ff4daf5a | 4950 | int hwclock_apply_localtime_delta(int *min) { |
7948c4df | 4951 | const struct timeval *tv_null = NULL; |
2076cf88 | 4952 | struct timespec ts; |
7948c4df KS |
4953 | struct tm *tm; |
4954 | int minuteswest; | |
4955 | struct timezone tz; | |
4956 | ||
2076cf88 LP |
4957 | assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0); |
4958 | assert_se(tm = localtime(&ts.tv_sec)); | |
7948c4df KS |
4959 | minuteswest = tm->tm_gmtoff / 60; |
4960 | ||
4961 | tz.tz_minuteswest = -minuteswest; | |
4962 | tz.tz_dsttime = 0; /* DST_NONE*/ | |
4963 | ||
4964 | /* | |
4965 | * If the hardware clock does not run in UTC, but in local time: | |
4966 | * The very first time we set the kernel's timezone, it will warp | |
4967 | * the clock so that it runs in UTC instead of local time. | |
4968 | */ | |
4969 | if (settimeofday(tv_null, &tz) < 0) | |
4970 | return -errno; | |
ff4daf5a KS |
4971 | if (min) |
4972 | *min = minuteswest; | |
4973 | return 0; | |
2076cf88 LP |
4974 | } |
4975 | ||
4976 | int hwclock_reset_localtime_delta(void) { | |
4977 | const struct timeval *tv_null = NULL; | |
4978 | struct timezone tz; | |
4979 | ||
4980 | tz.tz_minuteswest = 0; | |
4981 | tz.tz_dsttime = 0; /* DST_NONE*/ | |
4982 | ||
4983 | if (settimeofday(tv_null, &tz) < 0) | |
4984 | return -errno; | |
4985 | ||
4986 | return 0; | |
7948c4df KS |
4987 | } |
4988 | ||
4989 | int hwclock_get_time(struct tm *tm) { | |
4990 | int fd; | |
4991 | int err = 0; | |
4992 | ||
2076cf88 LP |
4993 | assert(tm); |
4994 | ||
7948c4df KS |
4995 | fd = open("/dev/rtc0", O_RDONLY|O_CLOEXEC); |
4996 | if (fd < 0) | |
4997 | return -errno; | |
2076cf88 LP |
4998 | |
4999 | /* This leaves the timezone fields of struct tm | |
5000 | * uninitialized! */ | |
7948c4df KS |
5001 | if (ioctl(fd, RTC_RD_TIME, tm) < 0) |
5002 | err = -errno; | |
2076cf88 LP |
5003 | |
5004 | /* We don't now daylight saving, so we reset this in order not | |
5005 | * to confused mktime(). */ | |
5006 | tm->tm_isdst = -1; | |
5007 | ||
5008 | close_nointr_nofail(fd); | |
7948c4df KS |
5009 | |
5010 | return err; | |
5011 | } | |
5012 | ||
5013 | int hwclock_set_time(const struct tm *tm) { | |
5014 | int fd; | |
5015 | int err = 0; | |
5016 | ||
2076cf88 LP |
5017 | assert(tm); |
5018 | ||
7948c4df KS |
5019 | fd = open("/dev/rtc0", O_RDONLY|O_CLOEXEC); |
5020 | if (fd < 0) | |
5021 | return -errno; | |
2076cf88 | 5022 | |
7948c4df KS |
5023 | if (ioctl(fd, RTC_SET_TIME, tm) < 0) |
5024 | err = -errno; | |
2076cf88 LP |
5025 | |
5026 | close_nointr_nofail(fd); | |
7948c4df KS |
5027 | |
5028 | return err; | |
5029 | } | |
f41607a6 | 5030 | |
34ca941c LP |
5031 | int copy_file(const char *from, const char *to) { |
5032 | int r, fdf, fdt; | |
5033 | ||
5034 | assert(from); | |
5035 | assert(to); | |
5036 | ||
5037 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5038 | if (fdf < 0) | |
5039 | return -errno; | |
5040 | ||
5041 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
5042 | if (fdt < 0) { | |
5043 | close_nointr_nofail(fdf); | |
5044 | return -errno; | |
5045 | } | |
5046 | ||
5047 | for (;;) { | |
5048 | char buf[PIPE_BUF]; | |
5049 | ssize_t n, k; | |
5050 | ||
5051 | n = read(fdf, buf, sizeof(buf)); | |
5052 | if (n < 0) { | |
5053 | r = -errno; | |
5054 | ||
5055 | close_nointr_nofail(fdf); | |
5056 | close_nointr(fdt); | |
5057 | unlink(to); | |
5058 | ||
5059 | return r; | |
5060 | } | |
5061 | ||
5062 | if (n == 0) | |
5063 | break; | |
5064 | ||
5065 | errno = 0; | |
5066 | k = loop_write(fdt, buf, n, false); | |
5067 | if (n != k) { | |
5068 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
5069 | ||
5070 | close_nointr_nofail(fdf); | |
5071 | close_nointr(fdt); | |
5072 | ||
5073 | unlink(to); | |
5074 | return r; | |
5075 | } | |
5076 | } | |
5077 | ||
5078 | close_nointr_nofail(fdf); | |
5079 | r = close_nointr(fdt); | |
5080 | ||
5081 | if (r < 0) { | |
5082 | unlink(to); | |
5083 | return r; | |
5084 | } | |
5085 | ||
5086 | return 0; | |
5087 | } | |
5088 | ||
5089 | int symlink_or_copy(const char *from, const char *to) { | |
5090 | char *pf = NULL, *pt = NULL; | |
5091 | struct stat a, b; | |
5092 | int r; | |
5093 | ||
5094 | assert(from); | |
5095 | assert(to); | |
5096 | ||
5097 | if (parent_of_path(from, &pf) < 0 || | |
5098 | parent_of_path(to, &pt) < 0) { | |
5099 | r = -ENOMEM; | |
5100 | goto finish; | |
5101 | } | |
5102 | ||
5103 | if (stat(pf, &a) < 0 || | |
5104 | stat(pt, &b) < 0) { | |
5105 | r = -errno; | |
5106 | goto finish; | |
5107 | } | |
5108 | ||
5109 | if (a.st_dev != b.st_dev) { | |
5110 | free(pf); | |
5111 | free(pt); | |
5112 | ||
5113 | return copy_file(from, to); | |
5114 | } | |
5115 | ||
5116 | if (symlink(from, to) < 0) { | |
5117 | r = -errno; | |
5118 | goto finish; | |
5119 | } | |
5120 | ||
5121 | r = 0; | |
5122 | ||
5123 | finish: | |
5124 | free(pf); | |
5125 | free(pt); | |
5126 | ||
5127 | return r; | |
5128 | } | |
5129 | ||
5130 | int symlink_or_copy_atomic(const char *from, const char *to) { | |
5131 | char *t, *x; | |
5132 | const char *fn; | |
5133 | size_t k; | |
5134 | unsigned long long ull; | |
5135 | unsigned i; | |
5136 | int r; | |
5137 | ||
5138 | assert(from); | |
5139 | assert(to); | |
5140 | ||
5141 | t = new(char, strlen(to) + 1 + 16 + 1); | |
5142 | if (!t) | |
5143 | return -ENOMEM; | |
5144 | ||
5145 | fn = file_name_from_path(to); | |
5146 | k = fn-to; | |
5147 | memcpy(t, to, k); | |
5148 | t[k] = '.'; | |
5149 | x = stpcpy(t+k+1, fn); | |
5150 | ||
5151 | ull = random_ull(); | |
5152 | for (i = 0; i < 16; i++) { | |
5153 | *(x++) = hexchar(ull & 0xF); | |
5154 | ull >>= 4; | |
5155 | } | |
5156 | ||
5157 | *x = 0; | |
5158 | ||
5159 | r = symlink_or_copy(from, t); | |
5160 | if (r < 0) { | |
5161 | unlink(t); | |
5162 | free(t); | |
5163 | return r; | |
5164 | } | |
5165 | ||
5166 | if (rename(t, to) < 0) { | |
5167 | r = -errno; | |
5168 | unlink(t); | |
5169 | free(t); | |
5170 | return r; | |
5171 | } | |
5172 | ||
5173 | free(t); | |
5174 | return r; | |
5175 | } | |
5176 | ||
98a28fef LP |
5177 | int audit_session_from_pid(pid_t pid, uint32_t *id) { |
5178 | char *p, *s; | |
5179 | uint32_t u; | |
5180 | int r; | |
5181 | ||
5182 | assert(pid >= 1); | |
5183 | assert(id); | |
5184 | ||
5185 | if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0) | |
5186 | return -ENOENT; | |
5187 | ||
5188 | if (asprintf(&p, "/proc/%lu/sessionid", (unsigned long) pid) < 0) | |
5189 | return -ENOMEM; | |
5190 | ||
5191 | r = read_one_line_file(p, &s); | |
5192 | free(p); | |
5193 | if (r < 0) | |
5194 | return r; | |
5195 | ||
5196 | r = safe_atou32(s, &u); | |
5197 | free(s); | |
5198 | ||
5199 | if (r < 0) | |
5200 | return r; | |
5201 | ||
5202 | if (u == (uint32_t) -1 || u <= 0) | |
5203 | return -ENOENT; | |
5204 | ||
5205 | *id = u; | |
5206 | return 0; | |
5207 | } | |
5208 | ||
4d6d6518 LP |
5209 | bool display_is_local(const char *display) { |
5210 | assert(display); | |
5211 | ||
5212 | return | |
5213 | display[0] == ':' && | |
5214 | display[1] >= '0' && | |
5215 | display[1] <= '9'; | |
5216 | } | |
5217 | ||
5218 | int socket_from_display(const char *display, char **path) { | |
5219 | size_t k; | |
5220 | char *f, *c; | |
5221 | ||
5222 | assert(display); | |
5223 | assert(path); | |
5224 | ||
5225 | if (!display_is_local(display)) | |
5226 | return -EINVAL; | |
5227 | ||
5228 | k = strspn(display+1, "0123456789"); | |
5229 | ||
5230 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
5231 | if (!f) | |
5232 | return -ENOMEM; | |
5233 | ||
5234 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
5235 | memcpy(c, display+1, k); | |
5236 | c[k] = 0; | |
5237 | ||
5238 | *path = f; | |
5239 | ||
5240 | return 0; | |
5241 | } | |
5242 | ||
1cccf435 MV |
5243 | int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home) { |
5244 | struct passwd *p; | |
5245 | unsigned long lu; | |
5246 | ||
5247 | assert(username); | |
5248 | assert(*username); | |
5249 | assert(uid); | |
5250 | assert(gid); | |
5251 | assert(home); | |
5252 | ||
5253 | /* We enforce some special rules for uid=0: in order to avoid | |
5254 | * NSS lookups for root we hardcode its data. */ | |
5255 | ||
5256 | if (streq(*username, "root") || streq(*username, "0")) { | |
5257 | *username = "root"; | |
5258 | *uid = 0; | |
5259 | *gid = 0; | |
5260 | *home = "/root"; | |
5261 | return 0; | |
5262 | } | |
5263 | ||
5264 | if (safe_atolu(*username, &lu) >= 0) { | |
5265 | errno = 0; | |
5266 | p = getpwuid((uid_t) lu); | |
5267 | ||
5268 | /* If there are multiple users with the same id, make | |
5269 | * sure to leave $USER to the configured value instead | |
5270 | * of the first occurrence in the database. However if | |
5271 | * the uid was configured by a numeric uid, then let's | |
5272 | * pick the real username from /etc/passwd. */ | |
5273 | if (p) | |
5274 | *username = p->pw_name; | |
5275 | } else { | |
5276 | errno = 0; | |
5277 | p = getpwnam(*username); | |
5278 | } | |
5279 | ||
5280 | if (!p) | |
5281 | return errno != 0 ? -errno : -ESRCH; | |
5282 | ||
5283 | *uid = p->pw_uid; | |
5284 | *gid = p->pw_gid; | |
5285 | *home = p->pw_dir; | |
5286 | return 0; | |
5287 | } | |
5288 | ||
8092a428 LP |
5289 | int glob_exists(const char *path) { |
5290 | glob_t g; | |
5291 | int r, k; | |
5292 | ||
5293 | assert(path); | |
5294 | ||
5295 | zero(g); | |
5296 | errno = 0; | |
5297 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
5298 | ||
5299 | if (k == GLOB_NOMATCH) | |
5300 | r = 0; | |
5301 | else if (k == GLOB_NOSPACE) | |
5302 | r = -ENOMEM; | |
5303 | else if (k == 0) | |
5304 | r = !strv_isempty(g.gl_pathv); | |
5305 | else | |
5306 | r = errno ? -errno : -EIO; | |
5307 | ||
5308 | globfree(&g); | |
5309 | ||
5310 | return r; | |
5311 | } | |
5312 | ||
83096483 LP |
5313 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
5314 | struct stat st; | |
5315 | ||
5316 | assert(d); | |
5317 | assert(de); | |
5318 | ||
5319 | if (de->d_type != DT_UNKNOWN) | |
5320 | return 0; | |
5321 | ||
5322 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
5323 | return -errno; | |
5324 | ||
5325 | de->d_type = | |
5326 | S_ISREG(st.st_mode) ? DT_REG : | |
5327 | S_ISDIR(st.st_mode) ? DT_DIR : | |
5328 | S_ISLNK(st.st_mode) ? DT_LNK : | |
5329 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
5330 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
5331 | S_ISCHR(st.st_mode) ? DT_CHR : | |
5332 | S_ISBLK(st.st_mode) ? DT_BLK : | |
5333 | DT_UNKNOWN; | |
5334 | ||
5335 | return 0; | |
5336 | } | |
5337 | ||
5338 | int in_search_path(const char *path, char **search) { | |
5339 | char **i, *parent; | |
5340 | int r; | |
5341 | ||
5342 | r = parent_of_path(path, &parent); | |
5343 | if (r < 0) | |
5344 | return r; | |
5345 | ||
5346 | r = 0; | |
5347 | ||
5348 | STRV_FOREACH(i, search) { | |
5349 | if (path_equal(parent, *i)) { | |
5350 | r = 1; | |
5351 | break; | |
5352 | } | |
5353 | } | |
5354 | ||
5355 | free(parent); | |
5356 | ||
5357 | return r; | |
5358 | } | |
5359 | ||
f41607a6 LP |
5360 | static const char *const ioprio_class_table[] = { |
5361 | [IOPRIO_CLASS_NONE] = "none", | |
5362 | [IOPRIO_CLASS_RT] = "realtime", | |
5363 | [IOPRIO_CLASS_BE] = "best-effort", | |
5364 | [IOPRIO_CLASS_IDLE] = "idle" | |
5365 | }; | |
5366 | ||
5367 | DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int); | |
5368 | ||
5369 | static const char *const sigchld_code_table[] = { | |
5370 | [CLD_EXITED] = "exited", | |
5371 | [CLD_KILLED] = "killed", | |
5372 | [CLD_DUMPED] = "dumped", | |
5373 | [CLD_TRAPPED] = "trapped", | |
5374 | [CLD_STOPPED] = "stopped", | |
5375 | [CLD_CONTINUED] = "continued", | |
5376 | }; | |
5377 | ||
5378 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
5379 | ||
5380 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
5381 | [LOG_FAC(LOG_KERN)] = "kern", | |
5382 | [LOG_FAC(LOG_USER)] = "user", | |
5383 | [LOG_FAC(LOG_MAIL)] = "mail", | |
5384 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
5385 | [LOG_FAC(LOG_AUTH)] = "auth", | |
5386 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
5387 | [LOG_FAC(LOG_LPR)] = "lpr", | |
5388 | [LOG_FAC(LOG_NEWS)] = "news", | |
5389 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
5390 | [LOG_FAC(LOG_CRON)] = "cron", | |
5391 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
5392 | [LOG_FAC(LOG_FTP)] = "ftp", | |
5393 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
5394 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
5395 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
5396 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
5397 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
5398 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
5399 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
5400 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
5401 | }; | |
5402 | ||
5403 | DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int); | |
5404 | ||
5405 | static const char *const log_level_table[] = { | |
5406 | [LOG_EMERG] = "emerg", | |
5407 | [LOG_ALERT] = "alert", | |
5408 | [LOG_CRIT] = "crit", | |
5409 | [LOG_ERR] = "err", | |
5410 | [LOG_WARNING] = "warning", | |
5411 | [LOG_NOTICE] = "notice", | |
5412 | [LOG_INFO] = "info", | |
5413 | [LOG_DEBUG] = "debug" | |
5414 | }; | |
5415 | ||
5416 | DEFINE_STRING_TABLE_LOOKUP(log_level, int); | |
5417 | ||
5418 | static const char* const sched_policy_table[] = { | |
5419 | [SCHED_OTHER] = "other", | |
5420 | [SCHED_BATCH] = "batch", | |
5421 | [SCHED_IDLE] = "idle", | |
5422 | [SCHED_FIFO] = "fifo", | |
5423 | [SCHED_RR] = "rr" | |
5424 | }; | |
5425 | ||
5426 | DEFINE_STRING_TABLE_LOOKUP(sched_policy, int); | |
5427 | ||
5428 | static const char* const rlimit_table[] = { | |
5429 | [RLIMIT_CPU] = "LimitCPU", | |
5430 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
5431 | [RLIMIT_DATA] = "LimitDATA", | |
5432 | [RLIMIT_STACK] = "LimitSTACK", | |
5433 | [RLIMIT_CORE] = "LimitCORE", | |
5434 | [RLIMIT_RSS] = "LimitRSS", | |
5435 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
5436 | [RLIMIT_AS] = "LimitAS", | |
5437 | [RLIMIT_NPROC] = "LimitNPROC", | |
5438 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
5439 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
5440 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
5441 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
5442 | [RLIMIT_NICE] = "LimitNICE", | |
5443 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
5444 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
5445 | }; | |
5446 | ||
5447 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
5448 | ||
5449 | static const char* const ip_tos_table[] = { | |
5450 | [IPTOS_LOWDELAY] = "low-delay", | |
5451 | [IPTOS_THROUGHPUT] = "throughput", | |
5452 | [IPTOS_RELIABILITY] = "reliability", | |
5453 | [IPTOS_LOWCOST] = "low-cost", | |
5454 | }; | |
5455 | ||
5456 | DEFINE_STRING_TABLE_LOOKUP(ip_tos, int); | |
5457 | ||
5458 | static const char *const signal_table[] = { | |
5459 | [SIGHUP] = "HUP", | |
5460 | [SIGINT] = "INT", | |
5461 | [SIGQUIT] = "QUIT", | |
5462 | [SIGILL] = "ILL", | |
5463 | [SIGTRAP] = "TRAP", | |
5464 | [SIGABRT] = "ABRT", | |
5465 | [SIGBUS] = "BUS", | |
5466 | [SIGFPE] = "FPE", | |
5467 | [SIGKILL] = "KILL", | |
5468 | [SIGUSR1] = "USR1", | |
5469 | [SIGSEGV] = "SEGV", | |
5470 | [SIGUSR2] = "USR2", | |
5471 | [SIGPIPE] = "PIPE", | |
5472 | [SIGALRM] = "ALRM", | |
5473 | [SIGTERM] = "TERM", | |
5474 | #ifdef SIGSTKFLT | |
5475 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
5476 | #endif | |
5477 | [SIGCHLD] = "CHLD", | |
5478 | [SIGCONT] = "CONT", | |
5479 | [SIGSTOP] = "STOP", | |
5480 | [SIGTSTP] = "TSTP", | |
5481 | [SIGTTIN] = "TTIN", | |
5482 | [SIGTTOU] = "TTOU", | |
5483 | [SIGURG] = "URG", | |
5484 | [SIGXCPU] = "XCPU", | |
5485 | [SIGXFSZ] = "XFSZ", | |
5486 | [SIGVTALRM] = "VTALRM", | |
5487 | [SIGPROF] = "PROF", | |
5488 | [SIGWINCH] = "WINCH", | |
5489 | [SIGIO] = "IO", | |
5490 | [SIGPWR] = "PWR", | |
5491 | [SIGSYS] = "SYS" | |
5492 | }; | |
5493 | ||
5494 | DEFINE_STRING_TABLE_LOOKUP(signal, int); |