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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] == '.' ||
6c78be3c 1202 streq(filename, "lost+found") ||
c85dc17b
LP		 1203 endswith(filename, "~") ||
1204 endswith(filename, ".rpmnew") ||
1205 endswith(filename, ".rpmsave") ||
1206 endswith(filename, ".rpmorig") ||
1207 endswith(filename, ".dpkg-old") ||
1208 endswith(filename, ".dpkg-new") ||
1209 endswith(filename, ".swp");
1210}
1211
3a0ecb08
LP		 1212int fd_nonblock(int fd, bool nonblock) {
1213 int flags;
1214
1215 assert(fd >= 0);
1216
1217 if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
1218 return -errno;
1219
1220 if (nonblock)
1221 flags |= O_NONBLOCK;
1222 else
1223 flags &= ~O_NONBLOCK;
1224
1225 if (fcntl(fd, F_SETFL, flags) < 0)
1226 return -errno;
1227
1228 return 0;
1229}
1230
1231int fd_cloexec(int fd, bool cloexec) {
1232 int flags;
1233
1234 assert(fd >= 0);
1235
1236 if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
1237 return -errno;
1238
1239 if (cloexec)
1240 flags |= FD_CLOEXEC;
1241 else
1242 flags &= ~FD_CLOEXEC;
1243
1244 if (fcntl(fd, F_SETFD, flags) < 0)
1245 return -errno;
1246
1247 return 0;
1248}
1249
a0d40ac5
LP		 1250int close_all_fds(const int except[], unsigned n_except) {
1251 DIR *d;
1252 struct dirent *de;
1253 int r = 0;
1254
1255 if (!(d = opendir("/proc/self/fd")))
1256 return -errno;
1257
1258 while ((de = readdir(d))) {
a7610064 1259 int fd = -1;
a0d40ac5 1260
a16e1123 1261 if (ignore_file(de->d_name))
a0d40ac5
LP		 1262 continue;
1263
1264 if ((r = safe_atoi(de->d_name, &fd)) < 0)
1265 goto finish;
1266
1267 if (fd < 3)
1268 continue;
1269
1270 if (fd == dirfd(d))
1271 continue;
1272
1273 if (except) {
1274 bool found;
1275 unsigned i;
1276
1277 found = false;
1278 for (i = 0; i < n_except; i++)
1279 if (except[i] == fd) {
1280 found = true;
1281 break;
1282 }
1283
1284 if (found)
1285 continue;
1286 }
1287
2f357920
LP		 1288 if ((r = close_nointr(fd)) < 0) {
1289 /* Valgrind has its own FD and doesn't want to have it closed */
1290 if (errno != EBADF)
1291 goto finish;
1292 }
a0d40ac5
LP		 1293 }
1294
2f357920
LP		 1295 r = 0;
1296
a0d40ac5
LP		 1297finish:
1298 closedir(d);
1299 return r;
1300}
1301
db12775d
LP		 1302bool chars_intersect(const char *a, const char *b) {
1303 const char *p;
1304
1305 /* Returns true if any of the chars in a are in b. */
1306 for (p = a; *p; p++)
1307 if (strchr(b, *p))
1308 return true;
1309
1310 return false;
1311}
1312
8b6c7120
LP		 1313char *format_timestamp(char *buf, size_t l, usec_t t) {
1314 struct tm tm;
1315 time_t sec;
1316
1317 assert(buf);
1318 assert(l > 0);
1319
1320 if (t <= 0)
1321 return NULL;
1322
1323 sec = (time_t) t / USEC_PER_SEC;
1324
1325 if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
1326 return NULL;
1327
1328 return buf;
1329}
1330
42856c10
LP		 1331bool fstype_is_network(const char *fstype) {
1332 static const char * const table[] = {
1333 "cifs",
1334 "smbfs",
1335 "ncpfs",
1336 "nfs",
1337 "nfs4"
1338 };
1339
1340 unsigned i;
1341
1342 for (i = 0; i < ELEMENTSOF(table); i++)
1343 if (streq(table[i], fstype))
1344 return true;
1345
1346 return false;
1347}
1348
601f6a1e
LP		 1349int chvt(int vt) {
1350 int fd, r = 0;
1351
1352 if ((fd = open("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
1353 return -errno;
1354
1355 if (vt < 0) {
1356 int tiocl[2] = {
1357 TIOCL_GETKMSGREDIRECT,
1358 0
1359 };
1360
1361 if (ioctl(fd, TIOCLINUX, tiocl) < 0)
1362 return -errno;
1363
1364 vt = tiocl[0] <= 0 ? 1 : tiocl[0];
1365 }
1366
1367 if (ioctl(fd, VT_ACTIVATE, vt) < 0)
1368 r = -errno;
1369
a16e1123 1370 close_nointr_nofail(r);
601f6a1e
LP		 1371 return r;
1372}
1373
80876c20
LP		 1374int read_one_char(FILE *f, char *ret, bool *need_nl) {
1375 struct termios old_termios, new_termios;
1376 char c;
1377 char line[1024];
1378
1379 assert(f);
1380 assert(ret);
1381
1382 if (tcgetattr(fileno(f), &old_termios) >= 0) {
1383 new_termios = old_termios;
1384
1385 new_termios.c_lflag &= ~ICANON;
1386 new_termios.c_cc[VMIN] = 1;
1387 new_termios.c_cc[VTIME] = 0;
1388
1389 if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
1390 size_t k;
1391
1392 k = fread(&c, 1, 1, f);
1393
1394 tcsetattr(fileno(f), TCSADRAIN, &old_termios);
1395
1396 if (k <= 0)
1397 return -EIO;
1398
1399 if (need_nl)
1400 *need_nl = c != '\n';
1401
1402 *ret = c;
1403 return 0;
1404 }
1405 }
1406
1407 if (!(fgets(line, sizeof(line), f)))
1408 return -EIO;
1409
1410 truncate_nl(line);
1411
1412 if (strlen(line) != 1)
1413 return -EBADMSG;
1414
1415 if (need_nl)
1416 *need_nl = false;
1417
1418 *ret = line[0];
1419 return 0;
1420}
1421
1422int ask(char *ret, const char *replies, const char *text, ...) {
1423 assert(ret);
1424 assert(replies);
1425 assert(text);
1426
1427 for (;;) {
1428 va_list ap;
1429 char c;
1430 int r;
1431 bool need_nl = true;
1432
b1b2dc0c
LP		 1433 fputs("\x1B[1m", stdout);
1434
80876c20
LP		 1435 va_start(ap, text);
1436 vprintf(text, ap);
1437 va_end(ap);
1438
b1b2dc0c
LP		 1439 fputs("\x1B[0m", stdout);
1440
80876c20
LP		 1441 fflush(stdout);
1442
1443 if ((r = read_one_char(stdin, &c, &need_nl)) < 0) {
1444
1445 if (r == -EBADMSG) {
1446 puts("Bad input, please try again.");
1447 continue;
1448 }
1449
1450 putchar('\n');
1451 return r;
1452 }
1453
1454 if (need_nl)
1455 putchar('\n');
1456
1457 if (strchr(replies, c)) {
1458 *ret = c;
1459 return 0;
1460 }
1461
1462 puts("Read unexpected character, please try again.");
1463 }
1464}
1465
1466int reset_terminal(int fd) {
1467 struct termios termios;
1468 int r = 0;
1469
1470 assert(fd >= 0);
1471
aaf694ca 1472 /* Set terminal to some sane defaults */
80876c20
LP		 1473
1474 if (tcgetattr(fd, &termios) < 0) {
1475 r = -errno;
1476 goto finish;
1477 }
1478
aaf694ca
LP		 1479 /* We only reset the stuff that matters to the software. How
1480 * hardware is set up we don't touch assuming that somebody
1481 * else will do that for us */
1482
1483 termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
80876c20
LP		 1484 termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
1485 termios.c_oflag |= ONLCR;
1486 termios.c_cflag |= CREAD;
1487 termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
1488
1489 termios.c_cc[VINTR] = 03; /* ^C */
1490 termios.c_cc[VQUIT] = 034; /* ^\ */
1491 termios.c_cc[VERASE] = 0177;
1492 termios.c_cc[VKILL] = 025; /* ^X */
1493 termios.c_cc[VEOF] = 04; /* ^D */
1494 termios.c_cc[VSTART] = 021; /* ^Q */
1495 termios.c_cc[VSTOP] = 023; /* ^S */
1496 termios.c_cc[VSUSP] = 032; /* ^Z */
1497 termios.c_cc[VLNEXT] = 026; /* ^V */
1498 termios.c_cc[VWERASE] = 027; /* ^W */
1499 termios.c_cc[VREPRINT] = 022; /* ^R */
aaf694ca
LP		 1500 termios.c_cc[VEOL] = 0;
1501 termios.c_cc[VEOL2] = 0;
80876c20
LP		 1502
1503 termios.c_cc[VTIME] = 0;
1504 termios.c_cc[VMIN] = 1;
1505
1506 if (tcsetattr(fd, TCSANOW, &termios) < 0)
1507 r = -errno;
1508
1509finish:
1510 /* Just in case, flush all crap out */
1511 tcflush(fd, TCIOFLUSH);
1512
1513 return r;
1514}
1515
1516int open_terminal(const char *name, int mode) {
1517 int fd, r;
1518
1519 if ((fd = open(name, mode)) < 0)
1520 return -errno;
1521
1522 if ((r = isatty(fd)) < 0) {
1523 close_nointr_nofail(fd);
1524 return -errno;
1525 }
1526
1527 if (!r) {
1528 close_nointr_nofail(fd);
1529 return -ENOTTY;
1530 }
1531
1532 return fd;
1533}
1534
1535int flush_fd(int fd) {
1536 struct pollfd pollfd;
1537
1538 zero(pollfd);
1539 pollfd.fd = fd;
1540 pollfd.events = POLLIN;
1541
1542 for (;;) {
1543 char buf[1024];
1544 ssize_t l;
1545 int r;
1546
1547 if ((r = poll(&pollfd, 1, 0)) < 0) {
1548
1549 if (errno == EINTR)
1550 continue;
1551
1552 return -errno;
1553 }
1554
1555 if (r == 0)
1556 return 0;
1557
1558 if ((l = read(fd, buf, sizeof(buf))) < 0) {
1559
1560 if (errno == EINTR)
1561 continue;
1562
1563 if (errno == EAGAIN)
1564 return 0;
1565
1566 return -errno;
1567 }
1568
1569 if (l <= 0)
1570 return 0;
1571 }
1572}
1573
1574int acquire_terminal(const char *name, bool fail, bool force) {
1575 int fd = -1, notify = -1, r, wd;
1576
1577 assert(name);
1578
1579 /* We use inotify to be notified when the tty is closed. We
1580 * create the watch before checking if we can actually acquire
1581 * it, so that we don't lose any event.
1582 *
1583 * Note: strictly speaking this actually watches for the
1584 * device being closed, it does *not* really watch whether a
1585 * tty loses its controlling process. However, unless some
1586 * rogue process uses TIOCNOTTY on /dev/tty *after* closing
1587 * its tty otherwise this will not become a problem. As long
1588 * as the administrator makes sure not configure any service
1589 * on the same tty as an untrusted user this should not be a
1590 * problem. (Which he probably should not do anyway.) */
1591
1592 if (!fail && !force) {
1593 if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
1594 r = -errno;
1595 goto fail;
1596 }
1597
1598 if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) {
1599 r = -errno;
1600 goto fail;
1601 }
1602 }
1603
1604 for (;;) {
1605 if ((r = flush_fd(notify)) < 0)
1606 goto fail;
1607
1608 /* We pass here O_NOCTTY only so that we can check the return
1609 * value TIOCSCTTY and have a reliable way to figure out if we
1610 * successfully became the controlling process of the tty */
1611 if ((fd = open_terminal(name, O_RDWR|O_NOCTTY)) < 0)
1612 return -errno;
1613
1614 /* First, try to get the tty */
1615 if ((r = ioctl(fd, TIOCSCTTY, force)) < 0 &&
1616 (force || fail || errno != EPERM)) {
1617 r = -errno;
1618 goto fail;
1619 }
1620
1621 if (r >= 0)
1622 break;
1623
1624 assert(!fail);
1625 assert(!force);
1626 assert(notify >= 0);
1627
1628 for (;;) {
1629 struct inotify_event e;
1630 ssize_t l;
1631
1632 if ((l = read(notify, &e, sizeof(e))) != sizeof(e)) {
1633
1634 if (l < 0) {
1635
1636 if (errno == EINTR)
1637 continue;
1638
1639 r = -errno;
1640 } else
1641 r = -EIO;
1642
1643 goto fail;
1644 }
1645
1646 if (e.wd != wd || !(e.mask & IN_CLOSE)) {
1647 r = -errno;
1648 goto fail;
1649 }
1650
1651 break;
1652 }
1653
1654 /* We close the tty fd here since if the old session
1655 * ended our handle will be dead. It's important that
1656 * we do this after sleeping, so that we don't enter
1657 * an endless loop. */
1658 close_nointr_nofail(fd);
1659 }
1660
1661 if (notify >= 0)
a16e1123 1662 close_nointr_nofail(notify);
80876c20
LP		 1663
1664 if ((r = reset_terminal(fd)) < 0)
1665 log_warning("Failed to reset terminal: %s", strerror(-r));
1666
1667 return fd;
1668
1669fail:
1670 if (fd >= 0)
a16e1123 1671 close_nointr_nofail(fd);
80876c20
LP		 1672
1673 if (notify >= 0)
a16e1123 1674 close_nointr_nofail(notify);
80876c20
LP		 1675
1676 return r;
1677}
1678
1679int release_terminal(void) {
1680 int r = 0, fd;
57cd2192 1681 struct sigaction sa_old, sa_new;
80876c20 1682
57cd2192 1683 if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY)) < 0)
80876c20
LP		 1684 return -errno;
1685
57cd2192
LP		 1686 /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
1687 * by our own TIOCNOTTY */
1688
1689 zero(sa_new);
1690 sa_new.sa_handler = SIG_IGN;
1691 sa_new.sa_flags = SA_RESTART;
1692 assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
1693
80876c20
LP		 1694 if (ioctl(fd, TIOCNOTTY) < 0)
1695 r = -errno;
1696
57cd2192
LP		 1697 assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
1698
80876c20
LP		 1699 close_nointr_nofail(fd);
1700 return r;
1701}
1702
a337c6fc
LP		 1703int ignore_signal(int sig) {
1704 struct sigaction sa;
1705
1706 zero(sa);
1707 sa.sa_handler = SIG_IGN;
1708 sa.sa_flags = SA_RESTART;
1709
1710 return sigaction(sig, &sa, NULL);
1711}
1712
8d567588
LP		 1713int close_pipe(int p[]) {
1714 int a = 0, b = 0;
1715
1716 assert(p);
1717
1718 if (p[0] >= 0) {
1719 a = close_nointr(p[0]);
1720 p[0] = -1;
1721 }
1722
1723 if (p[1] >= 0) {
1724 b = close_nointr(p[1]);
1725 p[1] = -1;
1726 }
1727
1728 return a < 0 ? a : b;
1729}
1730
1731ssize_t loop_read(int fd, void *buf, size_t nbytes) {
1732 uint8_t *p;
1733 ssize_t n = 0;
1734
1735 assert(fd >= 0);
1736 assert(buf);
1737
1738 p = buf;
1739
1740 while (nbytes > 0) {
1741 ssize_t k;
1742
1743 if ((k = read(fd, p, nbytes)) <= 0) {
1744
1745 if (errno == EINTR)
1746 continue;
1747
1748 if (errno == EAGAIN) {
1749 struct pollfd pollfd;
1750
1751 zero(pollfd);
1752 pollfd.fd = fd;
1753 pollfd.events = POLLIN;
1754
1755 if (poll(&pollfd, 1, -1) < 0) {
1756 if (errno == EINTR)
1757 continue;
1758
1759 return n > 0 ? n : -errno;
1760 }
1761
1762 if (pollfd.revents != POLLIN)
1763 return n > 0 ? n : -EIO;
1764
1765 continue;
1766 }
1767
1768 return n > 0 ? n : (k < 0 ? -errno : 0);
1769 }
1770
1771 p += k;
1772 nbytes -= k;
1773 n += k;
1774 }
1775
1776 return n;
1777}
1778
1779int path_is_mount_point(const char *t) {
1780 struct stat a, b;
1781 char *copy;
1782
1783 if (lstat(t, &a) < 0) {
1784
1785 if (errno == ENOENT)
1786 return 0;
1787
1788 return -errno;
1789 }
1790
1791 if (!(copy = strdup(t)))
1792 return -ENOMEM;
1793
1794 if (lstat(dirname(copy), &b) < 0) {
1795 free(copy);
1796 return -errno;
1797 }
1798
1799 free(copy);
1800
1801 return a.st_dev != b.st_dev;
1802}
1803
24a6e4a4
LP		 1804int parse_usec(const char *t, usec_t *usec) {
1805 static const struct {
1806 const char *suffix;
1807 usec_t usec;
1808 } table[] = {
1809 { "sec", USEC_PER_SEC },
1810 { "s", USEC_PER_SEC },
1811 { "min", USEC_PER_MINUTE },
1812 { "hr", USEC_PER_HOUR },
1813 { "h", USEC_PER_HOUR },
1814 { "d", USEC_PER_DAY },
1815 { "w", USEC_PER_WEEK },
1816 { "msec", USEC_PER_MSEC },
1817 { "ms", USEC_PER_MSEC },
1818 { "m", USEC_PER_MINUTE },
1819 { "usec", 1ULL },
1820 { "us", 1ULL },
1821 { "", USEC_PER_SEC },
1822 };
1823
1824 const char *p;
1825 usec_t r = 0;
1826
1827 assert(t);
1828 assert(usec);
1829
1830 p = t;
1831 do {
1832 long long l;
1833 char *e;
1834 unsigned i;
1835
1836 errno = 0;
1837 l = strtoll(p, &e, 10);
1838
1839 if (errno != 0)
1840 return -errno;
1841
1842 if (l < 0)
1843 return -ERANGE;
1844
1845 if (e == p)
1846 return -EINVAL;
1847
1848 e += strspn(e, WHITESPACE);
1849
1850 for (i = 0; i < ELEMENTSOF(table); i++)
1851 if (startswith(e, table[i].suffix)) {
1852 r += (usec_t) l * table[i].usec;
1853 p = e + strlen(table[i].suffix);
1854 break;
1855 }
1856
1857 if (i >= ELEMENTSOF(table))
1858 return -EINVAL;
1859
1860 } while (*p != 0);
1861
1862 *usec = r;
1863
1864 return 0;
1865}
1866
1dccbe19
LP		 1867static const char *const ioprio_class_table[] = {
1868 [IOPRIO_CLASS_NONE] = "none",
1869 [IOPRIO_CLASS_RT] = "realtime",
1870 [IOPRIO_CLASS_BE] = "best-effort",
1871 [IOPRIO_CLASS_IDLE] = "idle"
1872};
1873
1874DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int);
1875
1876static const char *const sigchld_code_table[] = {
1877 [CLD_EXITED] = "exited",
1878 [CLD_KILLED] = "killed",
1879 [CLD_DUMPED] = "dumped",
1880 [CLD_TRAPPED] = "trapped",
1881 [CLD_STOPPED] = "stopped",
1882 [CLD_CONTINUED] = "continued",
1883};
1884
1885DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
1886
1887static const char *const log_facility_table[LOG_NFACILITIES] = {
1888 [LOG_FAC(LOG_KERN)] = "kern",
1889 [LOG_FAC(LOG_USER)] = "user",
1890 [LOG_FAC(LOG_MAIL)] = "mail",
1891 [LOG_FAC(LOG_DAEMON)] = "daemon",
1892 [LOG_FAC(LOG_AUTH)] = "auth",
1893 [LOG_FAC(LOG_SYSLOG)] = "syslog",
1894 [LOG_FAC(LOG_LPR)] = "lpr",
1895 [LOG_FAC(LOG_NEWS)] = "news",
1896 [LOG_FAC(LOG_UUCP)] = "uucp",
1897 [LOG_FAC(LOG_CRON)] = "cron",
1898 [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
1899 [LOG_FAC(LOG_FTP)] = "ftp",
1900 [LOG_FAC(LOG_LOCAL0)] = "local0",
1901 [LOG_FAC(LOG_LOCAL1)] = "local1",
1902 [LOG_FAC(LOG_LOCAL2)] = "local2",
1903 [LOG_FAC(LOG_LOCAL3)] = "local3",
1904 [LOG_FAC(LOG_LOCAL4)] = "local4",
1905 [LOG_FAC(LOG_LOCAL5)] = "local5",
1906 [LOG_FAC(LOG_LOCAL6)] = "local6",
1907 [LOG_FAC(LOG_LOCAL7)] = "local7"
1908};
1909
1910DEFINE_STRING_TABLE_LOOKUP(log_facility, int);
1911
1912static const char *const log_level_table[] = {
1913 [LOG_EMERG] = "emerg",
1914 [LOG_ALERT] = "alert",
1915 [LOG_CRIT] = "crit",
1916 [LOG_ERR] = "err",
1917 [LOG_WARNING] = "warning",
1918 [LOG_NOTICE] = "notice",
1919 [LOG_INFO] = "info",
1920 [LOG_DEBUG] = "debug"
1921};
1922
1923DEFINE_STRING_TABLE_LOOKUP(log_level, int);
1924
1925static const char* const sched_policy_table[] = {
1926 [SCHED_OTHER] = "other",
1927 [SCHED_BATCH] = "batch",
1928 [SCHED_IDLE] = "idle",
1929 [SCHED_FIFO] = "fifo",
1930 [SCHED_RR] = "rr"
1931};
1932
1933DEFINE_STRING_TABLE_LOOKUP(sched_policy, int);
1934
1935static const char* const rlimit_table[] = {
1936 [RLIMIT_CPU] = "LimitCPU",
1937 [RLIMIT_FSIZE] = "LimitFSIZE",
1938 [RLIMIT_DATA] = "LimitDATA",
1939 [RLIMIT_STACK] = "LimitSTACK",
1940 [RLIMIT_CORE] = "LimitCORE",
1941 [RLIMIT_RSS] = "LimitRSS",
1942 [RLIMIT_NOFILE] = "LimitNOFILE",
1943 [RLIMIT_AS] = "LimitAS",
1944 [RLIMIT_NPROC] = "LimitNPROC",
1945 [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
1946 [RLIMIT_LOCKS] = "LimitLOCKS",
1947 [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
1948 [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
1949 [RLIMIT_NICE] = "LimitNICE",
1950 [RLIMIT_RTPRIO] = "LimitRTPRIO",
1951 [RLIMIT_RTTIME] = "LimitRTTIME"
1952};
1953
1954DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
Michael's branch of systemd.