]> git.ipfire.org Git - people/ms/systemd.git/blame - util.c
projects / people / ms / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
execute: typo fix
[people/ms/systemd.git] / util.c
CommitLineData
60918275
LP		 1/*-*- Mode: C; c-basic-offset: 8 -*-*/
2
a7334b09
LP		 3/***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20***/
21
60918275
LP		 22#include <assert.h>
23#include <string.h>
24#include <unistd.h>
25#include <errno.h>
85261803 26#include <stdlib.h>
034c6ed7
LP		 27#include <signal.h>
28#include <stdio.h>
1dccbe19
LP		 29#include <syslog.h>
30#include <sched.h>
31#include <sys/resource.h>
ef886c6a 32#include <linux/sched.h>
a9f5d454
LP		 33#include <sys/types.h>
34#include <sys/stat.h>
3a0ecb08 35#include <fcntl.h>
a0d40ac5 36#include <dirent.h>
601f6a1e
LP		 37#include <sys/ioctl.h>
38#include <linux/vt.h>
39#include <linux/tiocl.h>
80876c20
LP		 40#include <termios.h>
41#include <stdarg.h>
42#include <sys/inotify.h>
43#include <sys/poll.h>
8d567588 44#include <libgen.h>
60918275
LP		 45
46#include "macro.h"
47#include "util.h"
1dccbe19
LP		 48#include "ioprio.h"
49#include "missing.h"
a9f5d454 50#include "log.h"
65d2ebdc 51#include "strv.h"
60918275 52
e05797fb
LP		 53bool streq_ptr(const char *a, const char *b) {
54
55 /* Like streq(), but tries to make sense of NULL pointers */
56
57 if (a && b)
58 return streq(a, b);
59
60 if (!a && !b)
61 return true;
62
63 return false;
64}
65
47be870b 66usec_t now(clockid_t clock_id) {
60918275
LP		 67 struct timespec ts;
68
47be870b 69 assert_se(clock_gettime(clock_id, &ts) == 0);
60918275
LP		 70
71 return timespec_load(&ts);
72}
73
74usec_t timespec_load(const struct timespec *ts) {
75 assert(ts);
76
77 return
78 (usec_t) ts->tv_sec * USEC_PER_SEC +
79 (usec_t) ts->tv_nsec / NSEC_PER_USEC;
80}
81
82struct timespec *timespec_store(struct timespec *ts, usec_t u) {
83 assert(ts);
84
85 ts->tv_sec = (time_t) (u / USEC_PER_SEC);
86 ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
87
88 return ts;
89}
90
91usec_t timeval_load(const struct timeval *tv) {
92 assert(tv);
93
94 return
95 (usec_t) tv->tv_sec * USEC_PER_SEC +
96 (usec_t) tv->tv_usec;
97}
98
99struct timeval *timeval_store(struct timeval *tv, usec_t u) {
100 assert(tv);
101
102 tv->tv_sec = (time_t) (u / USEC_PER_SEC);
103 tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
104
105 return tv;
106}
107
108bool endswith(const char *s, const char *postfix) {
109 size_t sl, pl;
110
111 assert(s);
112 assert(postfix);
113
114 sl = strlen(s);
115 pl = strlen(postfix);
116
d4d0d4db
LP		 117 if (pl == 0)
118 return true;
119
60918275
LP		 120 if (sl < pl)
121 return false;
122
123 return memcmp(s + sl - pl, postfix, pl) == 0;
124}
125
126bool startswith(const char *s, const char *prefix) {
127 size_t sl, pl;
128
129 assert(s);
130 assert(prefix);
131
132 sl = strlen(s);
133 pl = strlen(prefix);
134
d4d0d4db
LP		 135 if (pl == 0)
136 return true;
137
60918275
LP		 138 if (sl < pl)
139 return false;
140
141 return memcmp(s, prefix, pl) == 0;
142}
143
79d6d816
LP		 144bool first_word(const char *s, const char *word) {
145 size_t sl, wl;
146
147 assert(s);
148 assert(word);
149
150 sl = strlen(s);
151 wl = strlen(word);
152
153 if (sl < wl)
154 return false;
155
d4d0d4db
LP		 156 if (wl == 0)
157 return true;
158
79d6d816
LP		 159 if (memcmp(s, word, wl) != 0)
160 return false;
161
d4d0d4db
LP		 162 return s[wl] == 0 ||
163 strchr(WHITESPACE, s[wl]);
79d6d816
LP		 164}
165
42f4e3c4 166int close_nointr(int fd) {
60918275
LP		 167 assert(fd >= 0);
168
169 for (;;) {
170 int r;
171
172 if ((r = close(fd)) >= 0)
173 return r;
174
175 if (errno != EINTR)
176 return r;
177 }
178}
85261803 179
85f136b5 180void close_nointr_nofail(int fd) {
80876c20 181 int saved_errno = errno;
85f136b5
LP		 182
183 /* like close_nointr() but cannot fail, and guarantees errno
184 * is unchanged */
185
186 assert_se(close_nointr(fd) == 0);
80876c20
LP		 187
188 errno = saved_errno;
85f136b5
LP		 189}
190
85261803
LP		 191int parse_boolean(const char *v) {
192 assert(v);
193
44d8db9e 194 if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
85261803 195 return 1;
44d8db9e 196 else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
85261803
LP		 197 return 0;
198
199 return -EINVAL;
200}
201
202int safe_atou(const char *s, unsigned *ret_u) {
203 char *x = NULL;
034c6ed7 204 unsigned long l;
85261803
LP		 205
206 assert(s);
207 assert(ret_u);
208
209 errno = 0;
210 l = strtoul(s, &x, 0);
211
212 if (!x || *x || errno)
213 return errno ? -errno : -EINVAL;
214
034c6ed7 215 if ((unsigned long) (unsigned) l != l)
85261803
LP		 216 return -ERANGE;
217
218 *ret_u = (unsigned) l;
219 return 0;
220}
221
222int safe_atoi(const char *s, int *ret_i) {
223 char *x = NULL;
034c6ed7 224 long l;
85261803
LP		 225
226 assert(s);
227 assert(ret_i);
228
229 errno = 0;
230 l = strtol(s, &x, 0);
231
232 if (!x || *x || errno)
233 return errno ? -errno : -EINVAL;
234
034c6ed7 235 if ((long) (int) l != l)
85261803
LP		 236 return -ERANGE;
237
034c6ed7
LP		 238 *ret_i = (int) l;
239 return 0;
240}
241
242int safe_atolu(const char *s, long unsigned *ret_lu) {
243 char *x = NULL;
244 unsigned long l;
245
246 assert(s);
247 assert(ret_lu);
248
249 errno = 0;
250 l = strtoul(s, &x, 0);
251
252 if (!x || *x || errno)
253 return errno ? -errno : -EINVAL;
254
255 *ret_lu = l;
256 return 0;
257}
258
259int safe_atoli(const char *s, long int *ret_li) {
260 char *x = NULL;
261 long l;
262
263 assert(s);
264 assert(ret_li);
265
266 errno = 0;
267 l = strtol(s, &x, 0);
268
269 if (!x || *x || errno)
270 return errno ? -errno : -EINVAL;
271
272 *ret_li = l;
273 return 0;
274}
275
276int safe_atollu(const char *s, long long unsigned *ret_llu) {
277 char *x = NULL;
278 unsigned long long l;
279
280 assert(s);
281 assert(ret_llu);
282
283 errno = 0;
284 l = strtoull(s, &x, 0);
285
286 if (!x || *x || errno)
287 return errno ? -errno : -EINVAL;
288
289 *ret_llu = l;
290 return 0;
291}
292
293int safe_atolli(const char *s, long long int *ret_lli) {
294 char *x = NULL;
295 long long l;
296
297 assert(s);
298 assert(ret_lli);
299
300 errno = 0;
301 l = strtoll(s, &x, 0);
302
303 if (!x || *x || errno)
304 return errno ? -errno : -EINVAL;
305
306 *ret_lli = l;
85261803
LP		 307 return 0;
308}
a41e8209 309
a41e8209 310/* Split a string into words. */
65d2ebdc 311char *split(const char *c, size_t *l, const char *separator, char **state) {
a41e8209
LP		 312 char *current;
313
314 current = *state ? *state : (char*) c;
315
316 if (!*current || *c == 0)
317 return NULL;
318
65d2ebdc
LP		 319 current += strspn(current, separator);
320 *l = strcspn(current, separator);
82919e3d
LP		 321 *state = current+*l;
322
323 return (char*) current;
324}
325
034c6ed7
LP		 326/* Split a string into words, but consider strings enclosed in '' and
327 * "" as words even if they include spaces. */
328char *split_quoted(const char *c, size_t *l, char **state) {
329 char *current;
330
331 current = *state ? *state : (char*) c;
332
333 if (!*current || *c == 0)
334 return NULL;
335
336 current += strspn(current, WHITESPACE);
337
338 if (*current == '\'') {
339 current ++;
340 *l = strcspn(current, "'");
341 *state = current+*l;
342
343 if (**state == '\'')
344 (*state)++;
345 } else if (*current == '\"') {
346 current ++;
b858b600 347 *l = strcspn(current, "\"");
034c6ed7
LP		 348 *state = current+*l;
349
350 if (**state == '\"')
351 (*state)++;
352 } else {
353 *l = strcspn(current, WHITESPACE);
354 *state = current+*l;
355 }
356
44d8db9e
LP		 357 /* FIXME: Cannot deal with strings that have spaces AND ticks
358 * in them */
359
034c6ed7
LP		 360 return (char*) current;
361}
362
65d2ebdc
LP		 363char **split_path_and_make_absolute(const char *p) {
364 char **l;
365 assert(p);
366
367 if (!(l = strv_split(p, ":")))
368 return NULL;
369
370 if (!strv_path_make_absolute_cwd(l)) {
371 strv_free(l);
372 return NULL;
373 }
374
375 return l;
376}
377
034c6ed7
LP		 378int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
379 int r;
380 FILE *f;
381 char fn[132], line[256], *p;
382 long long unsigned ppid;
383
384 assert(pid >= 0);
385 assert(_ppid);
386
387 assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%llu/stat", (unsigned long long) pid) < (int) (sizeof(fn)-1));
388 fn[sizeof(fn)-1] = 0;
389
390 if (!(f = fopen(fn, "r")))
391 return -errno;
392
393 if (!(fgets(line, sizeof(line), f))) {
394 r = -errno;
395 fclose(f);
396 return r;
397 }
398
399 fclose(f);
400
401 /* Let's skip the pid and comm fields. The latter is enclosed
402 * in () but does not escape any () in its value, so let's
403 * skip over it manually */
404
405 if (!(p = strrchr(line, ')')))
406 return -EIO;
407
408 p++;
409
410 if (sscanf(p, " "
411 "%*c " /* state */
412 "%llu ", /* ppid */
413 &ppid) != 1)
414 return -EIO;
415
416 if ((long long unsigned) (pid_t) ppid != ppid)
417 return -ERANGE;
418
419 *_ppid = (pid_t) ppid;
420
421 return 0;
422}
423
424int write_one_line_file(const char *fn, const char *line) {
425 FILE *f;
426 int r;
427
428 assert(fn);
429 assert(line);
430
431 if (!(f = fopen(fn, "we")))
432 return -errno;
433
434 if (fputs(line, f) < 0) {
435 r = -errno;
436 goto finish;
437 }
438
439 r = 0;
440finish:
441 fclose(f);
442 return r;
443}
444
445int read_one_line_file(const char *fn, char **line) {
446 FILE *f;
447 int r;
11316633 448 char t[2048], *c;
034c6ed7
LP		 449
450 assert(fn);
451 assert(line);
452
453 if (!(f = fopen(fn, "re")))
454 return -errno;
455
456 if (!(fgets(t, sizeof(t), f))) {
457 r = -errno;
458 goto finish;
459 }
460
461 if (!(c = strdup(t))) {
462 r = -ENOMEM;
463 goto finish;
464 }
465
466 *line = c;
467 r = 0;
468
469finish:
470 fclose(f);
471 return r;
472}
44d8db9e 473
7072ced8
LP		 474char *truncate_nl(char *s) {
475 assert(s);
476
477 s[strcspn(s, NEWLINE)] = 0;
478 return s;
479}
480
481int get_process_name(pid_t pid, char **name) {
482 char *p;
483 int r;
484
485 assert(pid >= 1);
486 assert(name);
487
488 if (asprintf(&p, "/proc/%llu/comm", (unsigned long long) pid) < 0)
489 return -ENOMEM;
490
491 r = read_one_line_file(p, name);
492 free(p);
493
494 if (r < 0)
495 return r;
496
497 truncate_nl(*name);
498 return 0;
499}
500
44d8db9e
LP		 501char *strappend(const char *s, const char *suffix) {
502 size_t a, b;
503 char *r;
504
505 assert(s);
506 assert(suffix);
507
508 a = strlen(s);
509 b = strlen(suffix);
510
511 if (!(r = new(char, a+b+1)))
512 return NULL;
513
514 memcpy(r, s, a);
515 memcpy(r+a, suffix, b);
516 r[a+b] = 0;
517
518 return r;
519}
87f0e418
LP		 520
521int readlink_malloc(const char *p, char **r) {
522 size_t l = 100;
523
524 assert(p);
525 assert(r);
526
527 for (;;) {
528 char *c;
529 ssize_t n;
530
531 if (!(c = new(char, l)))
532 return -ENOMEM;
533
534 if ((n = readlink(p, c, l-1)) < 0) {
535 int ret = -errno;
536 free(c);
537 return ret;
538 }
539
540 if ((size_t) n < l-1) {
541 c[n] = 0;
542 *r = c;
543 return 0;
544 }
545
546 free(c);
547 l *= 2;
548 }
549}
550
551char *file_name_from_path(const char *p) {
552 char *r;
553
554 assert(p);
555
556 if ((r = strrchr(p, '/')))
557 return r + 1;
558
559 return (char*) p;
560}
0301abf4
LP		 561
562bool path_is_absolute(const char *p) {
563 assert(p);
564
565 return p[0] == '/';
566}
567
568bool is_path(const char *p) {
569
570 return !!strchr(p, '/');
571}
572
573char *path_make_absolute(const char *p, const char *prefix) {
574 char *r;
575
576 assert(p);
577
65d2ebdc
LP		 578 /* Makes every item in the list an absolute path by prepending
579 * the prefix, if specified and necessary */
580
0301abf4
LP		 581 if (path_is_absolute(p) || !prefix)
582 return strdup(p);
583
584 if (asprintf(&r, "%s/%s", prefix, p) < 0)
585 return NULL;
586
587 return r;
588}
2a987ee8 589
65d2ebdc
LP		 590char *path_make_absolute_cwd(const char *p) {
591 char *cwd, *r;
592
593 assert(p);
594
595 /* Similar to path_make_absolute(), but prefixes with the
596 * current working directory. */
597
598 if (path_is_absolute(p))
599 return strdup(p);
600
601 if (!(cwd = get_current_dir_name()))
602 return NULL;
603
604 r = path_make_absolute(p, cwd);
605 free(cwd);
606
607 return r;
608}
609
610char **strv_path_make_absolute_cwd(char **l) {
611 char **s;
612
613 /* Goes through every item in the string list and makes it
614 * absolute. This works in place and won't rollback any
615 * changes on failure. */
616
617 STRV_FOREACH(s, l) {
618 char *t;
619
620 if (!(t = path_make_absolute_cwd(*s)))
621 return NULL;
622
623 free(*s);
624 *s = t;
625 }
626
627 return l;
628}
629
2a987ee8
LP		 630int reset_all_signal_handlers(void) {
631 int sig;
632
633 for (sig = 1; sig < _NSIG; sig++) {
634 struct sigaction sa;
635
636 if (sig == SIGKILL || sig == SIGSTOP)
637 continue;
638
639 zero(sa);
640 sa.sa_handler = SIG_DFL;
431c32bf 641 sa.sa_flags = SA_RESTART;
2a987ee8
LP		 642
643 /* On Linux the first two RT signals are reserved by
644 * glibc, and sigaction() will return EINVAL for them. */
645 if ((sigaction(sig, &sa, NULL) < 0))
646 if (errno != EINVAL)
647 return -errno;
648 }
649
8e274523 650 return 0;
2a987ee8 651}
4a72ff34
LP		 652
653char *strstrip(char *s) {
654 char *e, *l = NULL;
655
656 /* Drops trailing whitespace. Modifies the string in
657 * place. Returns pointer to first non-space character */
658
659 s += strspn(s, WHITESPACE);
660
661 for (e = s; *e; e++)
662 if (!strchr(WHITESPACE, *e))
663 l = e;
664
665 if (l)
666 *(l+1) = 0;
667 else
668 *s = 0;
669
670 return s;
4a72ff34
LP		 671}
672
ee9b5e01
LP		 673char *delete_chars(char *s, const char *bad) {
674 char *f, *t;
675
676 /* Drops all whitespace, regardless where in the string */
677
678 for (f = s, t = s; *f; f++) {
679 if (strchr(bad, *f))
680 continue;
681
682 *(t++) = *f;
683 }
684
685 *t = 0;
686
687 return s;
688}
689
4a72ff34
LP		 690char *file_in_same_dir(const char *path, const char *filename) {
691 char *e, *r;
692 size_t k;
693
694 assert(path);
695 assert(filename);
696
697 /* This removes the last component of path and appends
698 * filename, unless the latter is absolute anyway or the
699 * former isn't */
700
701 if (path_is_absolute(filename))
702 return strdup(filename);
703
704 if (!(e = strrchr(path, '/')))
705 return strdup(filename);
706
707 k = strlen(filename);
708 if (!(r = new(char, e-path+1+k+1)))
709 return NULL;
710
711 memcpy(r, path, e-path+1);
712 memcpy(r+(e-path)+1, filename, k+1);
713
714 return r;
715}
fb624d04 716
a9f5d454
LP		 717int mkdir_parents(const char *path, mode_t mode) {
718 const char *p, *e;
719
720 assert(path);
721
722 /* Creates every parent directory in the path except the last
723 * component. */
724
725 p = path + strspn(path, "/");
726 for (;;) {
727 int r;
728 char *t;
729
730 e = p + strcspn(p, "/");
731 p = e + strspn(e, "/");
732
733 /* Is this the last component? If so, then we're
734 * done */
735 if (*p == 0)
736 return 0;
737
738 if (!(t = strndup(path, e - path)))
739 return -ENOMEM;
740
741 r = mkdir(t, mode);
742
743 free(t);
744
745 if (r < 0 && errno != EEXIST)
746 return -errno;
747 }
748}
749
bbd67135
LP		 750int mkdir_p(const char *path, mode_t mode) {
751 int r;
752
753 /* Like mkdir -p */
754
755 if ((r = mkdir_parents(path, mode)) < 0)
756 return r;
757
758 if (mkdir(path, mode) < 0)
759 return -errno;
760
761 return 0;
762}
763
fb624d04
LP		 764char hexchar(int x) {
765 static const char table[16] = "0123456789abcdef";
766
767 return table[x & 15];
768}
4fe88d28
LP		 769
770int unhexchar(char c) {
771
772 if (c >= '0' && c <= '9')
773 return c - '0';
774
775 if (c >= 'a' && c <= 'f')
ea430986 776 return c - 'a' + 10;
4fe88d28
LP		 777
778 if (c >= 'A' && c <= 'F')
ea430986 779 return c - 'A' + 10;
4fe88d28
LP		 780
781 return -1;
782}
783
784char octchar(int x) {
785 return '0' + (x & 7);
786}
787
788int unoctchar(char c) {
789
790 if (c >= '0' && c <= '7')
791 return c - '0';
792
793 return -1;
794}
795
5af98f82
LP		 796char decchar(int x) {
797 return '0' + (x % 10);
798}
799
800int undecchar(char c) {
801
802 if (c >= '0' && c <= '9')
803 return c - '0';
804
805 return -1;
806}
807
4fe88d28
LP		 808char *cescape(const char *s) {
809 char *r, *t;
810 const char *f;
811
812 assert(s);
813
814 /* Does C style string escaping. */
815
816 if (!(r = new(char, strlen(s)*4 + 1)))
817 return NULL;
818
819 for (f = s, t = r; *f; f++)
820
821 switch (*f) {
822
823 case '\a':
824 *(t++) = '\\';
825 *(t++) = 'a';
826 break;
827 case '\b':
828 *(t++) = '\\';
829 *(t++) = 'b';
830 break;
831 case '\f':
832 *(t++) = '\\';
833 *(t++) = 'f';
834 break;
835 case '\n':
836 *(t++) = '\\';
837 *(t++) = 'n';
838 break;
839 case '\r':
840 *(t++) = '\\';
841 *(t++) = 'r';
842 break;
843 case '\t':
844 *(t++) = '\\';
845 *(t++) = 't';
846 break;
847 case '\v':
848 *(t++) = '\\';
849 *(t++) = 'v';
850 break;
851 case '\\':
852 *(t++) = '\\';
853 *(t++) = '\\';
854 break;
855 case '"':
856 *(t++) = '\\';
857 *(t++) = '"';
858 break;
859 case '\'':
860 *(t++) = '\\';
861 *(t++) = '\'';
862 break;
863
864 default:
865 /* For special chars we prefer octal over
866 * hexadecimal encoding, simply because glib's
867 * g_strescape() does the same */
868 if ((*f < ' ') || (*f >= 127)) {
869 *(t++) = '\\';
870 *(t++) = octchar((unsigned char) *f >> 6);
871 *(t++) = octchar((unsigned char) *f >> 3);
872 *(t++) = octchar((unsigned char) *f);
873 } else
874 *(t++) = *f;
875 break;
876 }
877
878 *t = 0;
879
880 return r;
881}
882
883char *cunescape(const char *s) {
884 char *r, *t;
885 const char *f;
886
887 assert(s);
888
889 /* Undoes C style string escaping */
890
891 if (!(r = new(char, strlen(s)+1)))
892 return r;
893
894 for (f = s, t = r; *f; f++) {
895
896 if (*f != '\\') {
897 *(t++) = *f;
898 continue;
899 }
900
901 f++;
902
903 switch (*f) {
904
905 case 'a':
906 *(t++) = '\a';
907 break;
908 case 'b':
909 *(t++) = '\b';
910 break;
911 case 'f':
912 *(t++) = '\f';
913 break;
914 case 'n':
915 *(t++) = '\n';
916 break;
917 case 'r':
918 *(t++) = '\r';
919 break;
920 case 't':
921 *(t++) = '\t';
922 break;
923 case 'v':
924 *(t++) = '\v';
925 break;
926 case '\\':
927 *(t++) = '\\';
928 break;
929 case '"':
930 *(t++) = '"';
931 break;
932 case '\'':
933 *(t++) = '\'';
934 break;
935
936 case 'x': {
937 /* hexadecimal encoding */
938 int a, b;
939
940 if ((a = unhexchar(f[1])) < 0 ||
941 (b = unhexchar(f[2])) < 0) {
942 /* Invalid escape code, let's take it literal then */
943 *(t++) = '\\';
944 *(t++) = 'x';
945 } else {
946 *(t++) = (char) ((a << 4) | b);
947 f += 2;
948 }
949
950 break;
951 }
952
953 case '0':
954 case '1':
955 case '2':
956 case '3':
957 case '4':
958 case '5':
959 case '6':
960 case '7': {
961 /* octal encoding */
962 int a, b, c;
963
964 if ((a = unoctchar(f[0])) < 0 ||
965 (b = unoctchar(f[1])) < 0 ||
966 (c = unoctchar(f[2])) < 0) {
967 /* Invalid escape code, let's take it literal then */
968 *(t++) = '\\';
969 *(t++) = f[0];
970 } else {
971 *(t++) = (char) ((a << 6) | (b << 3) | c);
972 f += 2;
973 }
974
975 break;
976 }
977
978 case 0:
979 /* premature end of string.*/
980 *(t++) = '\\';
981 goto finish;
982
983 default:
984 /* Invalid escape code, let's take it literal then */
985 *(t++) = '\\';
986 *(t++) = 'f';
987 break;
988 }
989 }
990
991finish:
992 *t = 0;
993 return r;
994}
995
996
997char *xescape(const char *s, const char *bad) {
998 char *r, *t;
999 const char *f;
1000
1001 /* Escapes all chars in bad, in addition to \ and all special
1002 * chars, in \xFF style escaping. May be reversed with
1003 * cunescape. */
1004
1005 if (!(r = new(char, strlen(s)*4+1)))
1006 return NULL;
1007
1008 for (f = s, t = r; *f; f++) {
1009
b866264a
LP		 1010 if ((*f < ' ') || (*f >= 127) ||
1011 (*f == '\\') || strchr(bad, *f)) {
4fe88d28
LP		 1012 *(t++) = '\\';
1013 *(t++) = 'x';
1014 *(t++) = hexchar(*f >> 4);
1015 *(t++) = hexchar(*f);
1016 } else
1017 *(t++) = *f;
1018 }
1019
1020 *t = 0;
1021
1022 return r;
1023}
1024
ea430986 1025char *bus_path_escape(const char *s) {
ea430986
LP		 1026 char *r, *t;
1027 const char *f;
1028
47be870b
LP		 1029 assert(s);
1030
ea430986
LP		 1031 /* Escapes all chars that D-Bus' object path cannot deal
1032 * with. Can be reverse with bus_path_unescape() */
1033
1034 if (!(r = new(char, strlen(s)*3+1)))
1035 return NULL;
1036
1037 for (f = s, t = r; *f; f++) {
1038
1039 if (!(*f >= 'A' && *f <= 'Z') &&
1040 !(*f >= 'a' && *f <= 'z') &&
1041 !(*f >= '0' && *f <= '9')) {
1042 *(t++) = '_';
1043 *(t++) = hexchar(*f >> 4);
1044 *(t++) = hexchar(*f);
1045 } else
1046 *(t++) = *f;
1047 }
1048
1049 *t = 0;
1050
1051 return r;
1052}
1053
9e2f7c11 1054char *bus_path_unescape(const char *f) {
ea430986 1055 char *r, *t;
ea430986 1056
9e2f7c11 1057 assert(f);
47be870b 1058
9e2f7c11 1059 if (!(r = strdup(f)))
ea430986
LP		 1060 return NULL;
1061
9e2f7c11 1062 for (t = r; *f; f++) {
ea430986
LP		 1063
1064 if (*f == '_') {
1065 int a, b;
1066
1067 if ((a = unhexchar(f[1])) < 0 ||
1068 (b = unhexchar(f[2])) < 0) {
1069 /* Invalid escape code, let's take it literal then */
1070 *(t++) = '_';
1071 } else {
1072 *(t++) = (char) ((a << 4) | b);
1073 f += 2;
1074 }
1075 } else
1076 *(t++) = *f;
1077 }
1078
1079 *t = 0;
1080
1081 return r;
1082}
1083
4fe88d28
LP		 1084char *path_kill_slashes(char *path) {
1085 char *f, *t;
1086 bool slash = false;
1087
1088 /* Removes redundant inner and trailing slashes. Modifies the
1089 * passed string in-place.
1090 *
1091 * ///foo///bar/ becomes /foo/bar
1092 */
1093
1094 for (f = path, t = path; *f; f++) {
1095
1096 if (*f == '/') {
1097 slash = true;
1098 continue;
1099 }
1100
1101 if (slash) {
1102 slash = false;
1103 *(t++) = '/';
1104 }
1105
1106 *(t++) = *f;
1107 }
1108
1109 /* Special rule, if we are talking of the root directory, a
1110 trailing slash is good */
1111
1112 if (t == path && slash)
1113 *(t++) = '/';
1114
1115 *t = 0;
1116 return path;
1117}
1118
1119bool path_startswith(const char *path, const char *prefix) {
1120 assert(path);
1121 assert(prefix);
1122
1123 if ((path[0] == '/') != (prefix[0] == '/'))
1124 return false;
1125
1126 for (;;) {
1127 size_t a, b;
1128
1129 path += strspn(path, "/");
1130 prefix += strspn(prefix, "/");
1131
1132 if (*prefix == 0)
1133 return true;
1134
1135 if (*path == 0)
1136 return false;
1137
1138 a = strcspn(path, "/");
1139 b = strcspn(prefix, "/");
1140
1141 if (a != b)
1142 return false;
1143
1144 if (memcmp(path, prefix, a) != 0)
1145 return false;
1146
1147 path += a;
1148 prefix += b;
1149 }
1150}
1151
15ae422b
LP		 1152bool path_equal(const char *a, const char *b) {
1153 assert(a);
1154 assert(b);
1155
1156 if ((a[0] == '/') != (b[0] == '/'))
1157 return false;
1158
1159 for (;;) {
1160 size_t j, k;
1161
1162 a += strspn(a, "/");
1163 b += strspn(b, "/");
1164
1165 if (*a == 0 && *b == 0)
1166 return true;
1167
1168 if (*a == 0 || *b == 0)
1169 return false;
1170
1171 j = strcspn(a, "/");
1172 k = strcspn(b, "/");
1173
1174 if (j != k)
1175 return false;
1176
1177 if (memcmp(a, b, j) != 0)
1178 return false;
1179
1180 a += j;
1181 b += k;
1182 }
1183}
1184
67d51650 1185char *ascii_strlower(char *t) {
4fe88d28
LP		 1186 char *p;
1187
67d51650 1188 assert(t);
4fe88d28 1189
67d51650 1190 for (p = t; *p; p++)
4fe88d28
LP		 1191 if (*p >= 'A' && *p <= 'Z')
1192 *p = *p - 'A' + 'a';
1193
67d51650 1194 return t;
4fe88d28 1195}
1dccbe19 1196
c85dc17b
LP		 1197bool ignore_file(const char *filename) {
1198 assert(filename);
1199
1200 return
1201 filename[0] == '.' ||
1202 endswith(filename, "~") ||
1203 endswith(filename, ".rpmnew") ||
1204 endswith(filename, ".rpmsave") ||
1205 endswith(filename, ".rpmorig") ||
1206 endswith(filename, ".dpkg-old") ||
1207 endswith(filename, ".dpkg-new") ||
1208 endswith(filename, ".swp");
1209}
1210
3a0ecb08
LP		 1211int fd_nonblock(int fd, bool nonblock) {
1212 int flags;
1213
1214 assert(fd >= 0);
1215
1216 if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
1217 return -errno;
1218
1219 if (nonblock)
1220 flags |= O_NONBLOCK;
1221 else
1222 flags &= ~O_NONBLOCK;
1223
1224 if (fcntl(fd, F_SETFL, flags) < 0)
1225 return -errno;
1226
1227 return 0;
1228}
1229
1230int fd_cloexec(int fd, bool cloexec) {
1231 int flags;
1232
1233 assert(fd >= 0);
1234
1235 if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
1236 return -errno;
1237
1238 if (cloexec)
1239 flags |= FD_CLOEXEC;
1240 else
1241 flags &= ~FD_CLOEXEC;
1242
1243 if (fcntl(fd, F_SETFD, flags) < 0)
1244 return -errno;
1245
1246 return 0;
1247}
1248
a0d40ac5
LP		 1249int close_all_fds(const int except[], unsigned n_except) {
1250 DIR *d;
1251 struct dirent *de;
1252 int r = 0;
1253
1254 if (!(d = opendir("/proc/self/fd")))
1255 return -errno;
1256
1257 while ((de = readdir(d))) {
a7610064 1258 int fd = -1;
a0d40ac5 1259
a16e1123 1260 if (ignore_file(de->d_name))
a0d40ac5
LP		 1261 continue;
1262
1263 if ((r = safe_atoi(de->d_name, &fd)) < 0)
1264 goto finish;
1265
1266 if (fd < 3)
1267 continue;
1268
1269 if (fd == dirfd(d))
1270 continue;
1271
1272 if (except) {
1273 bool found;
1274 unsigned i;
1275
1276 found = false;
1277 for (i = 0; i < n_except; i++)
1278 if (except[i] == fd) {
1279 found = true;
1280 break;
1281 }
1282
1283 if (found)
1284 continue;
1285 }
1286
2f357920
LP		 1287 if ((r = close_nointr(fd)) < 0) {
1288 /* Valgrind has its own FD and doesn't want to have it closed */
1289 if (errno != EBADF)
1290 goto finish;
1291 }
a0d40ac5
LP		 1292 }
1293
2f357920
LP		 1294 r = 0;
1295
a0d40ac5
LP		 1296finish:
1297 closedir(d);
1298 return r;
1299}
1300
db12775d
LP		 1301bool chars_intersect(const char *a, const char *b) {
1302 const char *p;
1303
1304 /* Returns true if any of the chars in a are in b. */
1305 for (p = a; *p; p++)
1306 if (strchr(b, *p))
1307 return true;
1308
1309 return false;
1310}
1311
8b6c7120
LP		 1312char *format_timestamp(char *buf, size_t l, usec_t t) {
1313 struct tm tm;
1314 time_t sec;
1315
1316 assert(buf);
1317 assert(l > 0);
1318
1319 if (t <= 0)
1320 return NULL;
1321
1322 sec = (time_t) t / USEC_PER_SEC;
1323
1324 if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
1325 return NULL;
1326
1327 return buf;
1328}
1329
42856c10
LP		 1330bool fstype_is_network(const char *fstype) {
1331 static const char * const table[] = {
1332 "cifs",
1333 "smbfs",
1334 "ncpfs",
1335 "nfs",
1336 "nfs4"
1337 };
1338
1339 unsigned i;
1340
1341 for (i = 0; i < ELEMENTSOF(table); i++)
1342 if (streq(table[i], fstype))
1343 return true;
1344
1345 return false;
1346}
1347
601f6a1e
LP		 1348int chvt(int vt) {
1349 int fd, r = 0;
1350
1351 if ((fd = open("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
1352 return -errno;
1353
1354 if (vt < 0) {
1355 int tiocl[2] = {
1356 TIOCL_GETKMSGREDIRECT,
1357 0
1358 };
1359
1360 if (ioctl(fd, TIOCLINUX, tiocl) < 0)
1361 return -errno;
1362
1363 vt = tiocl[0] <= 0 ? 1 : tiocl[0];
1364 }
1365
1366 if (ioctl(fd, VT_ACTIVATE, vt) < 0)
1367 r = -errno;
1368
a16e1123 1369 close_nointr_nofail(r);
601f6a1e
LP		 1370 return r;
1371}
1372
80876c20
LP		 1373int read_one_char(FILE *f, char *ret, bool *need_nl) {
1374 struct termios old_termios, new_termios;
1375 char c;
1376 char line[1024];
1377
1378 assert(f);
1379 assert(ret);
1380
1381 if (tcgetattr(fileno(f), &old_termios) >= 0) {
1382 new_termios = old_termios;
1383
1384 new_termios.c_lflag &= ~ICANON;
1385 new_termios.c_cc[VMIN] = 1;
1386 new_termios.c_cc[VTIME] = 0;
1387
1388 if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
1389 size_t k;
1390
1391 k = fread(&c, 1, 1, f);
1392
1393 tcsetattr(fileno(f), TCSADRAIN, &old_termios);
1394
1395 if (k <= 0)
1396 return -EIO;
1397
1398 if (need_nl)
1399 *need_nl = c != '\n';
1400
1401 *ret = c;
1402 return 0;
1403 }
1404 }
1405
1406 if (!(fgets(line, sizeof(line), f)))
1407 return -EIO;
1408
1409 truncate_nl(line);
1410
1411 if (strlen(line) != 1)
1412 return -EBADMSG;
1413
1414 if (need_nl)
1415 *need_nl = false;
1416
1417 *ret = line[0];
1418 return 0;
1419}
1420
1421int ask(char *ret, const char *replies, const char *text, ...) {
1422 assert(ret);
1423 assert(replies);
1424 assert(text);
1425
1426 for (;;) {
1427 va_list ap;
1428 char c;
1429 int r;
1430 bool need_nl = true;
1431
b1b2dc0c
LP		 1432 fputs("\x1B[1m", stdout);
1433
80876c20
LP		 1434 va_start(ap, text);
1435 vprintf(text, ap);
1436 va_end(ap);
1437
b1b2dc0c
LP		 1438 fputs("\x1B[0m", stdout);
1439
80876c20
LP		 1440 fflush(stdout);
1441
1442 if ((r = read_one_char(stdin, &c, &need_nl)) < 0) {
1443
1444 if (r == -EBADMSG) {
1445 puts("Bad input, please try again.");
1446 continue;
1447 }
1448
1449 putchar('\n');
1450 return r;
1451 }
1452
1453 if (need_nl)
1454 putchar('\n');
1455
1456 if (strchr(replies, c)) {
1457 *ret = c;
1458 return 0;
1459 }
1460
1461 puts("Read unexpected character, please try again.");
1462 }
1463}
1464
1465int reset_terminal(int fd) {
1466 struct termios termios;
1467 int r = 0;
1468
1469 assert(fd >= 0);
1470
aaf694ca 1471 /* Set terminal to some sane defaults */
80876c20
LP		 1472
1473 if (tcgetattr(fd, &termios) < 0) {
1474 r = -errno;
1475 goto finish;
1476 }
1477
aaf694ca
LP		 1478 /* We only reset the stuff that matters to the software. How
1479 * hardware is set up we don't touch assuming that somebody
1480 * else will do that for us */
1481
1482 termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
80876c20
LP		 1483 termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
1484 termios.c_oflag |= ONLCR;
1485 termios.c_cflag |= CREAD;
1486 termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
1487
1488 termios.c_cc[VINTR] = 03; /* ^C */
1489 termios.c_cc[VQUIT] = 034; /* ^\ */
1490 termios.c_cc[VERASE] = 0177;
1491 termios.c_cc[VKILL] = 025; /* ^X */
1492 termios.c_cc[VEOF] = 04; /* ^D */
1493 termios.c_cc[VSTART] = 021; /* ^Q */
1494 termios.c_cc[VSTOP] = 023; /* ^S */
1495 termios.c_cc[VSUSP] = 032; /* ^Z */
1496 termios.c_cc[VLNEXT] = 026; /* ^V */
1497 termios.c_cc[VWERASE] = 027; /* ^W */
1498 termios.c_cc[VREPRINT] = 022; /* ^R */
aaf694ca
LP		 1499 termios.c_cc[VEOL] = 0;
1500 termios.c_cc[VEOL2] = 0;
80876c20
LP		 1501
1502 termios.c_cc[VTIME] = 0;
1503 termios.c_cc[VMIN] = 1;
1504
1505 if (tcsetattr(fd, TCSANOW, &termios) < 0)
1506 r = -errno;
1507
1508finish:
1509 /* Just in case, flush all crap out */
1510 tcflush(fd, TCIOFLUSH);
1511
1512 return r;
1513}
1514
1515int open_terminal(const char *name, int mode) {
1516 int fd, r;
1517
1518 if ((fd = open(name, mode)) < 0)
1519 return -errno;
1520
1521 if ((r = isatty(fd)) < 0) {
1522 close_nointr_nofail(fd);
1523 return -errno;
1524 }
1525
1526 if (!r) {
1527 close_nointr_nofail(fd);
1528 return -ENOTTY;
1529 }
1530
1531 return fd;
1532}
1533
1534int flush_fd(int fd) {
1535 struct pollfd pollfd;
1536
1537 zero(pollfd);
1538 pollfd.fd = fd;
1539 pollfd.events = POLLIN;
1540
1541 for (;;) {
1542 char buf[1024];
1543 ssize_t l;
1544 int r;
1545
1546 if ((r = poll(&pollfd, 1, 0)) < 0) {
1547
1548 if (errno == EINTR)
1549 continue;
1550
1551 return -errno;
1552 }
1553
1554 if (r == 0)
1555 return 0;
1556
1557 if ((l = read(fd, buf, sizeof(buf))) < 0) {
1558
1559 if (errno == EINTR)
1560 continue;
1561
1562 if (errno == EAGAIN)
1563 return 0;
1564
1565 return -errno;
1566 }
1567
1568 if (l <= 0)
1569 return 0;
1570 }
1571}
1572
1573int acquire_terminal(const char *name, bool fail, bool force) {
1574 int fd = -1, notify = -1, r, wd;
1575
1576 assert(name);
1577
1578 /* We use inotify to be notified when the tty is closed. We
1579 * create the watch before checking if we can actually acquire
1580 * it, so that we don't lose any event.
1581 *
1582 * Note: strictly speaking this actually watches for the
1583 * device being closed, it does *not* really watch whether a
1584 * tty loses its controlling process. However, unless some
1585 * rogue process uses TIOCNOTTY on /dev/tty *after* closing
1586 * its tty otherwise this will not become a problem. As long
1587 * as the administrator makes sure not configure any service
1588 * on the same tty as an untrusted user this should not be a
1589 * problem. (Which he probably should not do anyway.) */
1590
1591 if (!fail && !force) {
1592 if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
1593 r = -errno;
1594 goto fail;
1595 }
1596
1597 if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) {
1598 r = -errno;
1599 goto fail;
1600 }
1601 }
1602
1603 for (;;) {
1604 if ((r = flush_fd(notify)) < 0)
1605 goto fail;
1606
1607 /* We pass here O_NOCTTY only so that we can check the return
1608 * value TIOCSCTTY and have a reliable way to figure out if we
1609 * successfully became the controlling process of the tty */
1610 if ((fd = open_terminal(name, O_RDWR|O_NOCTTY)) < 0)
1611 return -errno;
1612
1613 /* First, try to get the tty */
1614 if ((r = ioctl(fd, TIOCSCTTY, force)) < 0 &&
1615 (force || fail || errno != EPERM)) {
1616 r = -errno;
1617 goto fail;
1618 }
1619
1620 if (r >= 0)
1621 break;
1622
1623 assert(!fail);
1624 assert(!force);
1625 assert(notify >= 0);
1626
1627 for (;;) {
1628 struct inotify_event e;
1629 ssize_t l;
1630
1631 if ((l = read(notify, &e, sizeof(e))) != sizeof(e)) {
1632
1633 if (l < 0) {
1634
1635 if (errno == EINTR)
1636 continue;
1637
1638 r = -errno;
1639 } else
1640 r = -EIO;
1641
1642 goto fail;
1643 }
1644
1645 if (e.wd != wd || !(e.mask & IN_CLOSE)) {
1646 r = -errno;
1647 goto fail;
1648 }
1649
1650 break;
1651 }
1652
1653 /* We close the tty fd here since if the old session
1654 * ended our handle will be dead. It's important that
1655 * we do this after sleeping, so that we don't enter
1656 * an endless loop. */
1657 close_nointr_nofail(fd);
1658 }
1659
1660 if (notify >= 0)
a16e1123 1661 close_nointr_nofail(notify);
80876c20
LP		 1662
1663 if ((r = reset_terminal(fd)) < 0)
1664 log_warning("Failed to reset terminal: %s", strerror(-r));
1665
1666 return fd;
1667
1668fail:
1669 if (fd >= 0)
a16e1123 1670 close_nointr_nofail(fd);
80876c20
LP		 1671
1672 if (notify >= 0)
a16e1123 1673 close_nointr_nofail(notify);
80876c20
LP		 1674
1675 return r;
1676}
1677
1678int release_terminal(void) {
1679 int r = 0, fd;
1680
1681 if ((fd = open("/dev/tty", O_RDWR)) < 0)
1682 return -errno;
1683
1684 if (ioctl(fd, TIOCNOTTY) < 0)
1685 r = -errno;
1686
1687 close_nointr_nofail(fd);
1688 return r;
1689}
1690
a337c6fc
LP		 1691int ignore_signal(int sig) {
1692 struct sigaction sa;
1693
1694 zero(sa);
1695 sa.sa_handler = SIG_IGN;
1696 sa.sa_flags = SA_RESTART;
1697
1698 return sigaction(sig, &sa, NULL);
1699}
1700
8d567588
LP		 1701int close_pipe(int p[]) {
1702 int a = 0, b = 0;
1703
1704 assert(p);
1705
1706 if (p[0] >= 0) {
1707 a = close_nointr(p[0]);
1708 p[0] = -1;
1709 }
1710
1711 if (p[1] >= 0) {
1712 b = close_nointr(p[1]);
1713 p[1] = -1;
1714 }
1715
1716 return a < 0 ? a : b;
1717}
1718
1719ssize_t loop_read(int fd, void *buf, size_t nbytes) {
1720 uint8_t *p;
1721 ssize_t n = 0;
1722
1723 assert(fd >= 0);
1724 assert(buf);
1725
1726 p = buf;
1727
1728 while (nbytes > 0) {
1729 ssize_t k;
1730
1731 if ((k = read(fd, p, nbytes)) <= 0) {
1732
1733 if (errno == EINTR)
1734 continue;
1735
1736 if (errno == EAGAIN) {
1737 struct pollfd pollfd;
1738
1739 zero(pollfd);
1740 pollfd.fd = fd;
1741 pollfd.events = POLLIN;
1742
1743 if (poll(&pollfd, 1, -1) < 0) {
1744 if (errno == EINTR)
1745 continue;
1746
1747 return n > 0 ? n : -errno;
1748 }
1749
1750 if (pollfd.revents != POLLIN)
1751 return n > 0 ? n : -EIO;
1752
1753 continue;
1754 }
1755
1756 return n > 0 ? n : (k < 0 ? -errno : 0);
1757 }
1758
1759 p += k;
1760 nbytes -= k;
1761 n += k;
1762 }
1763
1764 return n;
1765}
1766
1767int path_is_mount_point(const char *t) {
1768 struct stat a, b;
1769 char *copy;
1770
1771 if (lstat(t, &a) < 0) {
1772
1773 if (errno == ENOENT)
1774 return 0;
1775
1776 return -errno;
1777 }
1778
1779 if (!(copy = strdup(t)))
1780 return -ENOMEM;
1781
1782 if (lstat(dirname(copy), &b) < 0) {
1783 free(copy);
1784 return -errno;
1785 }
1786
1787 free(copy);
1788
1789 return a.st_dev != b.st_dev;
1790}
1791
24a6e4a4
LP		 1792int parse_usec(const char *t, usec_t *usec) {
1793 static const struct {
1794 const char *suffix;
1795 usec_t usec;
1796 } table[] = {
1797 { "sec", USEC_PER_SEC },
1798 { "s", USEC_PER_SEC },
1799 { "min", USEC_PER_MINUTE },
1800 { "hr", USEC_PER_HOUR },
1801 { "h", USEC_PER_HOUR },
1802 { "d", USEC_PER_DAY },
1803 { "w", USEC_PER_WEEK },
1804 { "msec", USEC_PER_MSEC },
1805 { "ms", USEC_PER_MSEC },
1806 { "m", USEC_PER_MINUTE },
1807 { "usec", 1ULL },
1808 { "us", 1ULL },
1809 { "", USEC_PER_SEC },
1810 };
1811
1812 const char *p;
1813 usec_t r = 0;
1814
1815 assert(t);
1816 assert(usec);
1817
1818 p = t;
1819 do {
1820 long long l;
1821 char *e;
1822 unsigned i;
1823
1824 errno = 0;
1825 l = strtoll(p, &e, 10);
1826
1827 if (errno != 0)
1828 return -errno;
1829
1830 if (l < 0)
1831 return -ERANGE;
1832
1833 if (e == p)
1834 return -EINVAL;
1835
1836 e += strspn(e, WHITESPACE);
1837
1838 for (i = 0; i < ELEMENTSOF(table); i++)
1839 if (startswith(e, table[i].suffix)) {
1840 r += (usec_t) l * table[i].usec;
1841 p = e + strlen(table[i].suffix);
1842 break;
1843 }
1844
1845 if (i >= ELEMENTSOF(table))
1846 return -EINVAL;
1847
1848 } while (*p != 0);
1849
1850 *usec = r;
1851
1852 return 0;
1853}
1854
1dccbe19
LP		 1855static const char *const ioprio_class_table[] = {
1856 [IOPRIO_CLASS_NONE] = "none",
1857 [IOPRIO_CLASS_RT] = "realtime",
1858 [IOPRIO_CLASS_BE] = "best-effort",
1859 [IOPRIO_CLASS_IDLE] = "idle"
1860};
1861
1862DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int);
1863
1864static const char *const sigchld_code_table[] = {
1865 [CLD_EXITED] = "exited",
1866 [CLD_KILLED] = "killed",
1867 [CLD_DUMPED] = "dumped",
1868 [CLD_TRAPPED] = "trapped",
1869 [CLD_STOPPED] = "stopped",
1870 [CLD_CONTINUED] = "continued",
1871};
1872
1873DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
1874
1875static const char *const log_facility_table[LOG_NFACILITIES] = {
1876 [LOG_FAC(LOG_KERN)] = "kern",
1877 [LOG_FAC(LOG_USER)] = "user",
1878 [LOG_FAC(LOG_MAIL)] = "mail",
1879 [LOG_FAC(LOG_DAEMON)] = "daemon",
1880 [LOG_FAC(LOG_AUTH)] = "auth",
1881 [LOG_FAC(LOG_SYSLOG)] = "syslog",
1882 [LOG_FAC(LOG_LPR)] = "lpr",
1883 [LOG_FAC(LOG_NEWS)] = "news",
1884 [LOG_FAC(LOG_UUCP)] = "uucp",
1885 [LOG_FAC(LOG_CRON)] = "cron",
1886 [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
1887 [LOG_FAC(LOG_FTP)] = "ftp",
1888 [LOG_FAC(LOG_LOCAL0)] = "local0",
1889 [LOG_FAC(LOG_LOCAL1)] = "local1",
1890 [LOG_FAC(LOG_LOCAL2)] = "local2",
1891 [LOG_FAC(LOG_LOCAL3)] = "local3",
1892 [LOG_FAC(LOG_LOCAL4)] = "local4",
1893 [LOG_FAC(LOG_LOCAL5)] = "local5",
1894 [LOG_FAC(LOG_LOCAL6)] = "local6",
1895 [LOG_FAC(LOG_LOCAL7)] = "local7"
1896};
1897
1898DEFINE_STRING_TABLE_LOOKUP(log_facility, int);
1899
1900static const char *const log_level_table[] = {
1901 [LOG_EMERG] = "emerg",
1902 [LOG_ALERT] = "alert",
1903 [LOG_CRIT] = "crit",
1904 [LOG_ERR] = "err",
1905 [LOG_WARNING] = "warning",
1906 [LOG_NOTICE] = "notice",
1907 [LOG_INFO] = "info",
1908 [LOG_DEBUG] = "debug"
1909};
1910
1911DEFINE_STRING_TABLE_LOOKUP(log_level, int);
1912
1913static const char* const sched_policy_table[] = {
1914 [SCHED_OTHER] = "other",
1915 [SCHED_BATCH] = "batch",
1916 [SCHED_IDLE] = "idle",
1917 [SCHED_FIFO] = "fifo",
1918 [SCHED_RR] = "rr"
1919};
1920
1921DEFINE_STRING_TABLE_LOOKUP(sched_policy, int);
1922
1923static const char* const rlimit_table[] = {
1924 [RLIMIT_CPU] = "LimitCPU",
1925 [RLIMIT_FSIZE] = "LimitFSIZE",
1926 [RLIMIT_DATA] = "LimitDATA",
1927 [RLIMIT_STACK] = "LimitSTACK",
1928 [RLIMIT_CORE] = "LimitCORE",
1929 [RLIMIT_RSS] = "LimitRSS",
1930 [RLIMIT_NOFILE] = "LimitNOFILE",
1931 [RLIMIT_AS] = "LimitAS",
1932 [RLIMIT_NPROC] = "LimitNPROC",
1933 [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
1934 [RLIMIT_LOCKS] = "LimitLOCKS",
1935 [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
1936 [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
1937 [RLIMIT_NICE] = "LimitNICE",
1938 [RLIMIT_RTPRIO] = "LimitRTPRIO",
1939 [RLIMIT_RTTIME] = "LimitRTTIME"
1940};
1941
1942DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
Michael's branch of systemd.