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