]> git.ipfire.org Git - thirdparty/systemd.git/blame - util.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
main: introduce configurable crash shell
[thirdparty/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>
60918275
LP		 37
38#include "macro.h"
39#include "util.h"
1dccbe19
LP		 40#include "ioprio.h"
41#include "missing.h"
a9f5d454 42#include "log.h"
65d2ebdc 43#include "strv.h"
60918275 44
e05797fb
LP		 45bool streq_ptr(const char *a, const char *b) {
46
47 /* Like streq(), but tries to make sense of NULL pointers */
48
49 if (a && b)
50 return streq(a, b);
51
52 if (!a && !b)
53 return true;
54
55 return false;
56}
57
47be870b 58usec_t now(clockid_t clock_id) {
60918275
LP		 59 struct timespec ts;
60
47be870b 61 assert_se(clock_gettime(clock_id, &ts) == 0);
60918275
LP		 62
63 return timespec_load(&ts);
64}
65
66usec_t timespec_load(const struct timespec *ts) {
67 assert(ts);
68
69 return
70 (usec_t) ts->tv_sec * USEC_PER_SEC +
71 (usec_t) ts->tv_nsec / NSEC_PER_USEC;
72}
73
74struct timespec *timespec_store(struct timespec *ts, usec_t u) {
75 assert(ts);
76
77 ts->tv_sec = (time_t) (u / USEC_PER_SEC);
78 ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
79
80 return ts;
81}
82
83usec_t timeval_load(const struct timeval *tv) {
84 assert(tv);
85
86 return
87 (usec_t) tv->tv_sec * USEC_PER_SEC +
88 (usec_t) tv->tv_usec;
89}
90
91struct timeval *timeval_store(struct timeval *tv, usec_t u) {
92 assert(tv);
93
94 tv->tv_sec = (time_t) (u / USEC_PER_SEC);
95 tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
96
97 return tv;
98}
99
100bool endswith(const char *s, const char *postfix) {
101 size_t sl, pl;
102
103 assert(s);
104 assert(postfix);
105
106 sl = strlen(s);
107 pl = strlen(postfix);
108
109 if (sl < pl)
110 return false;
111
112 return memcmp(s + sl - pl, postfix, pl) == 0;
113}
114
115bool startswith(const char *s, const char *prefix) {
116 size_t sl, pl;
117
118 assert(s);
119 assert(prefix);
120
121 sl = strlen(s);
122 pl = strlen(prefix);
123
124 if (sl < pl)
125 return false;
126
127 return memcmp(s, prefix, pl) == 0;
128}
129
79d6d816
LP		 130bool first_word(const char *s, const char *word) {
131 size_t sl, wl;
132
133 assert(s);
134 assert(word);
135
136 sl = strlen(s);
137 wl = strlen(word);
138
139 if (sl < wl)
140 return false;
141
142 if (memcmp(s, word, wl) != 0)
143 return false;
144
145 return (s[wl] == 0 ||
146 strchr(WHITESPACE, s[wl]));
147}
148
42f4e3c4 149int close_nointr(int fd) {
60918275
LP		 150 assert(fd >= 0);
151
152 for (;;) {
153 int r;
154
155 if ((r = close(fd)) >= 0)
156 return r;
157
158 if (errno != EINTR)
159 return r;
160 }
161}
85261803 162
85f136b5
LP		 163void close_nointr_nofail(int fd) {
164
165 /* like close_nointr() but cannot fail, and guarantees errno
166 * is unchanged */
167
168 assert_se(close_nointr(fd) == 0);
169}
170
85261803
LP		 171int parse_boolean(const char *v) {
172 assert(v);
173
44d8db9e 174 if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
85261803 175 return 1;
44d8db9e 176 else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
85261803
LP		 177 return 0;
178
179 return -EINVAL;
180}
181
182int safe_atou(const char *s, unsigned *ret_u) {
183 char *x = NULL;
034c6ed7 184 unsigned long l;
85261803
LP		 185
186 assert(s);
187 assert(ret_u);
188
189 errno = 0;
190 l = strtoul(s, &x, 0);
191
192 if (!x || *x || errno)
193 return errno ? -errno : -EINVAL;
194
034c6ed7 195 if ((unsigned long) (unsigned) l != l)
85261803
LP		 196 return -ERANGE;
197
198 *ret_u = (unsigned) l;
199 return 0;
200}
201
202int safe_atoi(const char *s, int *ret_i) {
203 char *x = NULL;
034c6ed7 204 long l;
85261803
LP		 205
206 assert(s);
207 assert(ret_i);
208
209 errno = 0;
210 l = strtol(s, &x, 0);
211
212 if (!x || *x || errno)
213 return errno ? -errno : -EINVAL;
214
034c6ed7 215 if ((long) (int) l != l)
85261803
LP		 216 return -ERANGE;
217
034c6ed7
LP		 218 *ret_i = (int) l;
219 return 0;
220}
221
222int safe_atolu(const char *s, long unsigned *ret_lu) {
223 char *x = NULL;
224 unsigned long l;
225
226 assert(s);
227 assert(ret_lu);
228
229 errno = 0;
230 l = strtoul(s, &x, 0);
231
232 if (!x || *x || errno)
233 return errno ? -errno : -EINVAL;
234
235 *ret_lu = l;
236 return 0;
237}
238
239int safe_atoli(const char *s, long int *ret_li) {
240 char *x = NULL;
241 long l;
242
243 assert(s);
244 assert(ret_li);
245
246 errno = 0;
247 l = strtol(s, &x, 0);
248
249 if (!x || *x || errno)
250 return errno ? -errno : -EINVAL;
251
252 *ret_li = l;
253 return 0;
254}
255
256int safe_atollu(const char *s, long long unsigned *ret_llu) {
257 char *x = NULL;
258 unsigned long long l;
259
260 assert(s);
261 assert(ret_llu);
262
263 errno = 0;
264 l = strtoull(s, &x, 0);
265
266 if (!x || *x || errno)
267 return errno ? -errno : -EINVAL;
268
269 *ret_llu = l;
270 return 0;
271}
272
273int safe_atolli(const char *s, long long int *ret_lli) {
274 char *x = NULL;
275 long long l;
276
277 assert(s);
278 assert(ret_lli);
279
280 errno = 0;
281 l = strtoll(s, &x, 0);
282
283 if (!x || *x || errno)
284 return errno ? -errno : -EINVAL;
285
286 *ret_lli = l;
85261803
LP		 287 return 0;
288}
a41e8209 289
a41e8209 290/* Split a string into words. */
65d2ebdc 291char *split(const char *c, size_t *l, const char *separator, char **state) {
a41e8209
LP		 292 char *current;
293
294 current = *state ? *state : (char*) c;
295
296 if (!*current || *c == 0)
297 return NULL;
298
65d2ebdc
LP		 299 current += strspn(current, separator);
300 *l = strcspn(current, separator);
82919e3d
LP		 301 *state = current+*l;
302
303 return (char*) current;
304}
305
034c6ed7
LP		 306/* Split a string into words, but consider strings enclosed in '' and
307 * "" as words even if they include spaces. */
308char *split_quoted(const char *c, size_t *l, char **state) {
309 char *current;
310
311 current = *state ? *state : (char*) c;
312
313 if (!*current || *c == 0)
314 return NULL;
315
316 current += strspn(current, WHITESPACE);
317
318 if (*current == '\'') {
319 current ++;
320 *l = strcspn(current, "'");
321 *state = current+*l;
322
323 if (**state == '\'')
324 (*state)++;
325 } else if (*current == '\"') {
326 current ++;
b858b600 327 *l = strcspn(current, "\"");
034c6ed7
LP		 328 *state = current+*l;
329
330 if (**state == '\"')
331 (*state)++;
332 } else {
333 *l = strcspn(current, WHITESPACE);
334 *state = current+*l;
335 }
336
44d8db9e
LP		 337 /* FIXME: Cannot deal with strings that have spaces AND ticks
338 * in them */
339
034c6ed7
LP		 340 return (char*) current;
341}
342
65d2ebdc
LP		 343char **split_path_and_make_absolute(const char *p) {
344 char **l;
345 assert(p);
346
347 if (!(l = strv_split(p, ":")))
348 return NULL;
349
350 if (!strv_path_make_absolute_cwd(l)) {
351 strv_free(l);
352 return NULL;
353 }
354
355 return l;
356}
357
034c6ed7
LP		 358int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
359 int r;
360 FILE *f;
361 char fn[132], line[256], *p;
362 long long unsigned ppid;
363
364 assert(pid >= 0);
365 assert(_ppid);
366
367 assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%llu/stat", (unsigned long long) pid) < (int) (sizeof(fn)-1));
368 fn[sizeof(fn)-1] = 0;
369
370 if (!(f = fopen(fn, "r")))
371 return -errno;
372
373 if (!(fgets(line, sizeof(line), f))) {
374 r = -errno;
375 fclose(f);
376 return r;
377 }
378
379 fclose(f);
380
381 /* Let's skip the pid and comm fields. The latter is enclosed
382 * in () but does not escape any () in its value, so let's
383 * skip over it manually */
384
385 if (!(p = strrchr(line, ')')))
386 return -EIO;
387
388 p++;
389
390 if (sscanf(p, " "
391 "%*c " /* state */
392 "%llu ", /* ppid */
393 &ppid) != 1)
394 return -EIO;
395
396 if ((long long unsigned) (pid_t) ppid != ppid)
397 return -ERANGE;
398
399 *_ppid = (pid_t) ppid;
400
401 return 0;
402}
403
404int write_one_line_file(const char *fn, const char *line) {
405 FILE *f;
406 int r;
407
408 assert(fn);
409 assert(line);
410
411 if (!(f = fopen(fn, "we")))
412 return -errno;
413
414 if (fputs(line, f) < 0) {
415 r = -errno;
416 goto finish;
417 }
418
419 r = 0;
420finish:
421 fclose(f);
422 return r;
423}
424
425int read_one_line_file(const char *fn, char **line) {
426 FILE *f;
427 int r;
11316633 428 char t[2048], *c;
034c6ed7
LP		 429
430 assert(fn);
431 assert(line);
432
433 if (!(f = fopen(fn, "re")))
434 return -errno;
435
436 if (!(fgets(t, sizeof(t), f))) {
437 r = -errno;
438 goto finish;
439 }
440
441 if (!(c = strdup(t))) {
442 r = -ENOMEM;
443 goto finish;
444 }
445
446 *line = c;
447 r = 0;
448
449finish:
450 fclose(f);
451 return r;
452}
44d8db9e 453
7072ced8
LP		 454char *truncate_nl(char *s) {
455 assert(s);
456
457 s[strcspn(s, NEWLINE)] = 0;
458 return s;
459}
460
461int get_process_name(pid_t pid, char **name) {
462 char *p;
463 int r;
464
465 assert(pid >= 1);
466 assert(name);
467
468 if (asprintf(&p, "/proc/%llu/comm", (unsigned long long) pid) < 0)
469 return -ENOMEM;
470
471 r = read_one_line_file(p, name);
472 free(p);
473
474 if (r < 0)
475 return r;
476
477 truncate_nl(*name);
478 return 0;
479}
480
44d8db9e
LP		 481char *strappend(const char *s, const char *suffix) {
482 size_t a, b;
483 char *r;
484
485 assert(s);
486 assert(suffix);
487
488 a = strlen(s);
489 b = strlen(suffix);
490
491 if (!(r = new(char, a+b+1)))
492 return NULL;
493
494 memcpy(r, s, a);
495 memcpy(r+a, suffix, b);
496 r[a+b] = 0;
497
498 return r;
499}
87f0e418
LP		 500
501int readlink_malloc(const char *p, char **r) {
502 size_t l = 100;
503
504 assert(p);
505 assert(r);
506
507 for (;;) {
508 char *c;
509 ssize_t n;
510
511 if (!(c = new(char, l)))
512 return -ENOMEM;
513
514 if ((n = readlink(p, c, l-1)) < 0) {
515 int ret = -errno;
516 free(c);
517 return ret;
518 }
519
520 if ((size_t) n < l-1) {
521 c[n] = 0;
522 *r = c;
523 return 0;
524 }
525
526 free(c);
527 l *= 2;
528 }
529}
530
531char *file_name_from_path(const char *p) {
532 char *r;
533
534 assert(p);
535
536 if ((r = strrchr(p, '/')))
537 return r + 1;
538
539 return (char*) p;
540}
0301abf4
LP		 541
542bool path_is_absolute(const char *p) {
543 assert(p);
544
545 return p[0] == '/';
546}
547
548bool is_path(const char *p) {
549
550 return !!strchr(p, '/');
551}
552
553char *path_make_absolute(const char *p, const char *prefix) {
554 char *r;
555
556 assert(p);
557
65d2ebdc
LP		 558 /* Makes every item in the list an absolute path by prepending
559 * the prefix, if specified and necessary */
560
0301abf4
LP		 561 if (path_is_absolute(p) || !prefix)
562 return strdup(p);
563
564 if (asprintf(&r, "%s/%s", prefix, p) < 0)
565 return NULL;
566
567 return r;
568}
2a987ee8 569
65d2ebdc
LP		 570char *path_make_absolute_cwd(const char *p) {
571 char *cwd, *r;
572
573 assert(p);
574
575 /* Similar to path_make_absolute(), but prefixes with the
576 * current working directory. */
577
578 if (path_is_absolute(p))
579 return strdup(p);
580
581 if (!(cwd = get_current_dir_name()))
582 return NULL;
583
584 r = path_make_absolute(p, cwd);
585 free(cwd);
586
587 return r;
588}
589
590char **strv_path_make_absolute_cwd(char **l) {
591 char **s;
592
593 /* Goes through every item in the string list and makes it
594 * absolute. This works in place and won't rollback any
595 * changes on failure. */
596
597 STRV_FOREACH(s, l) {
598 char *t;
599
600 if (!(t = path_make_absolute_cwd(*s)))
601 return NULL;
602
603 free(*s);
604 *s = t;
605 }
606
607 return l;
608}
609
2a987ee8
LP		 610int reset_all_signal_handlers(void) {
611 int sig;
612
613 for (sig = 1; sig < _NSIG; sig++) {
614 struct sigaction sa;
615
616 if (sig == SIGKILL || sig == SIGSTOP)
617 continue;
618
619 zero(sa);
620 sa.sa_handler = SIG_DFL;
431c32bf 621 sa.sa_flags = SA_RESTART;
2a987ee8
LP		 622
623 /* On Linux the first two RT signals are reserved by
624 * glibc, and sigaction() will return EINVAL for them. */
625 if ((sigaction(sig, &sa, NULL) < 0))
626 if (errno != EINVAL)
627 return -errno;
628 }
629
8e274523 630 return 0;
2a987ee8 631}
4a72ff34
LP		 632
633char *strstrip(char *s) {
634 char *e, *l = NULL;
635
636 /* Drops trailing whitespace. Modifies the string in
637 * place. Returns pointer to first non-space character */
638
639 s += strspn(s, WHITESPACE);
640
641 for (e = s; *e; e++)
642 if (!strchr(WHITESPACE, *e))
643 l = e;
644
645 if (l)
646 *(l+1) = 0;
647 else
648 *s = 0;
649
650 return s;
651
652}
653
ee9b5e01
LP		 654char *delete_chars(char *s, const char *bad) {
655 char *f, *t;
656
657 /* Drops all whitespace, regardless where in the string */
658
659 for (f = s, t = s; *f; f++) {
660 if (strchr(bad, *f))
661 continue;
662
663 *(t++) = *f;
664 }
665
666 *t = 0;
667
668 return s;
669}
670
4a72ff34
LP		 671char *file_in_same_dir(const char *path, const char *filename) {
672 char *e, *r;
673 size_t k;
674
675 assert(path);
676 assert(filename);
677
678 /* This removes the last component of path and appends
679 * filename, unless the latter is absolute anyway or the
680 * former isn't */
681
682 if (path_is_absolute(filename))
683 return strdup(filename);
684
685 if (!(e = strrchr(path, '/')))
686 return strdup(filename);
687
688 k = strlen(filename);
689 if (!(r = new(char, e-path+1+k+1)))
690 return NULL;
691
692 memcpy(r, path, e-path+1);
693 memcpy(r+(e-path)+1, filename, k+1);
694
695 return r;
696}
fb624d04 697
a9f5d454
LP		 698int mkdir_parents(const char *path, mode_t mode) {
699 const char *p, *e;
700
701 assert(path);
702
703 /* Creates every parent directory in the path except the last
704 * component. */
705
706 p = path + strspn(path, "/");
707 for (;;) {
708 int r;
709 char *t;
710
711 e = p + strcspn(p, "/");
712 p = e + strspn(e, "/");
713
714 /* Is this the last component? If so, then we're
715 * done */
716 if (*p == 0)
717 return 0;
718
719 if (!(t = strndup(path, e - path)))
720 return -ENOMEM;
721
722 r = mkdir(t, mode);
723
724 free(t);
725
726 if (r < 0 && errno != EEXIST)
727 return -errno;
728 }
729}
730
bbd67135
LP		 731int mkdir_p(const char *path, mode_t mode) {
732 int r;
733
734 /* Like mkdir -p */
735
736 if ((r = mkdir_parents(path, mode)) < 0)
737 return r;
738
739 if (mkdir(path, mode) < 0)
740 return -errno;
741
742 return 0;
743}
744
fb624d04
LP		 745char hexchar(int x) {
746 static const char table[16] = "0123456789abcdef";
747
748 return table[x & 15];
749}
4fe88d28
LP		 750
751int unhexchar(char c) {
752
753 if (c >= '0' && c <= '9')
754 return c - '0';
755
756 if (c >= 'a' && c <= 'f')
ea430986 757 return c - 'a' + 10;
4fe88d28
LP		 758
759 if (c >= 'A' && c <= 'F')
ea430986 760 return c - 'A' + 10;
4fe88d28
LP		 761
762 return -1;
763}
764
765char octchar(int x) {
766 return '0' + (x & 7);
767}
768
769int unoctchar(char c) {
770
771 if (c >= '0' && c <= '7')
772 return c - '0';
773
774 return -1;
775}
776
5af98f82
LP		 777char decchar(int x) {
778 return '0' + (x % 10);
779}
780
781int undecchar(char c) {
782
783 if (c >= '0' && c <= '9')
784 return c - '0';
785
786 return -1;
787}
788
4fe88d28
LP		 789char *cescape(const char *s) {
790 char *r, *t;
791 const char *f;
792
793 assert(s);
794
795 /* Does C style string escaping. */
796
797 if (!(r = new(char, strlen(s)*4 + 1)))
798 return NULL;
799
800 for (f = s, t = r; *f; f++)
801
802 switch (*f) {
803
804 case '\a':
805 *(t++) = '\\';
806 *(t++) = 'a';
807 break;
808 case '\b':
809 *(t++) = '\\';
810 *(t++) = 'b';
811 break;
812 case '\f':
813 *(t++) = '\\';
814 *(t++) = 'f';
815 break;
816 case '\n':
817 *(t++) = '\\';
818 *(t++) = 'n';
819 break;
820 case '\r':
821 *(t++) = '\\';
822 *(t++) = 'r';
823 break;
824 case '\t':
825 *(t++) = '\\';
826 *(t++) = 't';
827 break;
828 case '\v':
829 *(t++) = '\\';
830 *(t++) = 'v';
831 break;
832 case '\\':
833 *(t++) = '\\';
834 *(t++) = '\\';
835 break;
836 case '"':
837 *(t++) = '\\';
838 *(t++) = '"';
839 break;
840 case '\'':
841 *(t++) = '\\';
842 *(t++) = '\'';
843 break;
844
845 default:
846 /* For special chars we prefer octal over
847 * hexadecimal encoding, simply because glib's
848 * g_strescape() does the same */
849 if ((*f < ' ') || (*f >= 127)) {
850 *(t++) = '\\';
851 *(t++) = octchar((unsigned char) *f >> 6);
852 *(t++) = octchar((unsigned char) *f >> 3);
853 *(t++) = octchar((unsigned char) *f);
854 } else
855 *(t++) = *f;
856 break;
857 }
858
859 *t = 0;
860
861 return r;
862}
863
864char *cunescape(const char *s) {
865 char *r, *t;
866 const char *f;
867
868 assert(s);
869
870 /* Undoes C style string escaping */
871
872 if (!(r = new(char, strlen(s)+1)))
873 return r;
874
875 for (f = s, t = r; *f; f++) {
876
877 if (*f != '\\') {
878 *(t++) = *f;
879 continue;
880 }
881
882 f++;
883
884 switch (*f) {
885
886 case 'a':
887 *(t++) = '\a';
888 break;
889 case 'b':
890 *(t++) = '\b';
891 break;
892 case 'f':
893 *(t++) = '\f';
894 break;
895 case 'n':
896 *(t++) = '\n';
897 break;
898 case 'r':
899 *(t++) = '\r';
900 break;
901 case 't':
902 *(t++) = '\t';
903 break;
904 case 'v':
905 *(t++) = '\v';
906 break;
907 case '\\':
908 *(t++) = '\\';
909 break;
910 case '"':
911 *(t++) = '"';
912 break;
913 case '\'':
914 *(t++) = '\'';
915 break;
916
917 case 'x': {
918 /* hexadecimal encoding */
919 int a, b;
920
921 if ((a = unhexchar(f[1])) < 0 ||
922 (b = unhexchar(f[2])) < 0) {
923 /* Invalid escape code, let's take it literal then */
924 *(t++) = '\\';
925 *(t++) = 'x';
926 } else {
927 *(t++) = (char) ((a << 4) | b);
928 f += 2;
929 }
930
931 break;
932 }
933
934 case '0':
935 case '1':
936 case '2':
937 case '3':
938 case '4':
939 case '5':
940 case '6':
941 case '7': {
942 /* octal encoding */
943 int a, b, c;
944
945 if ((a = unoctchar(f[0])) < 0 ||
946 (b = unoctchar(f[1])) < 0 ||
947 (c = unoctchar(f[2])) < 0) {
948 /* Invalid escape code, let's take it literal then */
949 *(t++) = '\\';
950 *(t++) = f[0];
951 } else {
952 *(t++) = (char) ((a << 6) | (b << 3) | c);
953 f += 2;
954 }
955
956 break;
957 }
958
959 case 0:
960 /* premature end of string.*/
961 *(t++) = '\\';
962 goto finish;
963
964 default:
965 /* Invalid escape code, let's take it literal then */
966 *(t++) = '\\';
967 *(t++) = 'f';
968 break;
969 }
970 }
971
972finish:
973 *t = 0;
974 return r;
975}
976
977
978char *xescape(const char *s, const char *bad) {
979 char *r, *t;
980 const char *f;
981
982 /* Escapes all chars in bad, in addition to \ and all special
983 * chars, in \xFF style escaping. May be reversed with
984 * cunescape. */
985
986 if (!(r = new(char, strlen(s)*4+1)))
987 return NULL;
988
989 for (f = s, t = r; *f; f++) {
990
b866264a
LP		 991 if ((*f < ' ') || (*f >= 127) ||
992 (*f == '\\') || strchr(bad, *f)) {
4fe88d28
LP		 993 *(t++) = '\\';
994 *(t++) = 'x';
995 *(t++) = hexchar(*f >> 4);
996 *(t++) = hexchar(*f);
997 } else
998 *(t++) = *f;
999 }
1000
1001 *t = 0;
1002
1003 return r;
1004}
1005
ea430986 1006char *bus_path_escape(const char *s) {
ea430986
LP		 1007 char *r, *t;
1008 const char *f;
1009
47be870b
LP		 1010 assert(s);
1011
ea430986
LP		 1012 /* Escapes all chars that D-Bus' object path cannot deal
1013 * with. Can be reverse with bus_path_unescape() */
1014
1015 if (!(r = new(char, strlen(s)*3+1)))
1016 return NULL;
1017
1018 for (f = s, t = r; *f; f++) {
1019
1020 if (!(*f >= 'A' && *f <= 'Z') &&
1021 !(*f >= 'a' && *f <= 'z') &&
1022 !(*f >= '0' && *f <= '9')) {
1023 *(t++) = '_';
1024 *(t++) = hexchar(*f >> 4);
1025 *(t++) = hexchar(*f);
1026 } else
1027 *(t++) = *f;
1028 }
1029
1030 *t = 0;
1031
1032 return r;
1033}
1034
1035char *bus_path_unescape(const char *s) {
ea430986
LP		 1036 char *r, *t;
1037 const char *f;
1038
47be870b
LP		 1039 assert(s);
1040
ea430986
LP		 1041 if (!(r = new(char, strlen(s)+1)))
1042 return NULL;
1043
1044 for (f = s, t = r; *f; f++) {
1045
1046 if (*f == '_') {
1047 int a, b;
1048
1049 if ((a = unhexchar(f[1])) < 0 ||
1050 (b = unhexchar(f[2])) < 0) {
1051 /* Invalid escape code, let's take it literal then */
1052 *(t++) = '_';
1053 } else {
1054 *(t++) = (char) ((a << 4) | b);
1055 f += 2;
1056 }
1057 } else
1058 *(t++) = *f;
1059 }
1060
1061 *t = 0;
1062
1063 return r;
1064}
1065
4fe88d28
LP		 1066char *path_kill_slashes(char *path) {
1067 char *f, *t;
1068 bool slash = false;
1069
1070 /* Removes redundant inner and trailing slashes. Modifies the
1071 * passed string in-place.
1072 *
1073 * ///foo///bar/ becomes /foo/bar
1074 */
1075
1076 for (f = path, t = path; *f; f++) {
1077
1078 if (*f == '/') {
1079 slash = true;
1080 continue;
1081 }
1082
1083 if (slash) {
1084 slash = false;
1085 *(t++) = '/';
1086 }
1087
1088 *(t++) = *f;
1089 }
1090
1091 /* Special rule, if we are talking of the root directory, a
1092 trailing slash is good */
1093
1094 if (t == path && slash)
1095 *(t++) = '/';
1096
1097 *t = 0;
1098 return path;
1099}
1100
1101bool path_startswith(const char *path, const char *prefix) {
1102 assert(path);
1103 assert(prefix);
1104
1105 if ((path[0] == '/') != (prefix[0] == '/'))
1106 return false;
1107
1108 for (;;) {
1109 size_t a, b;
1110
1111 path += strspn(path, "/");
1112 prefix += strspn(prefix, "/");
1113
1114 if (*prefix == 0)
1115 return true;
1116
1117 if (*path == 0)
1118 return false;
1119
1120 a = strcspn(path, "/");
1121 b = strcspn(prefix, "/");
1122
1123 if (a != b)
1124 return false;
1125
1126 if (memcmp(path, prefix, a) != 0)
1127 return false;
1128
1129 path += a;
1130 prefix += b;
1131 }
1132}
1133
67d51650 1134char *ascii_strlower(char *t) {
4fe88d28
LP		 1135 char *p;
1136
67d51650 1137 assert(t);
4fe88d28 1138
67d51650 1139 for (p = t; *p; p++)
4fe88d28
LP		 1140 if (*p >= 'A' && *p <= 'Z')
1141 *p = *p - 'A' + 'a';
1142
67d51650 1143 return t;
4fe88d28 1144}
1dccbe19 1145
c85dc17b
LP		 1146bool ignore_file(const char *filename) {
1147 assert(filename);
1148
1149 return
1150 filename[0] == '.' ||
1151 endswith(filename, "~") ||
1152 endswith(filename, ".rpmnew") ||
1153 endswith(filename, ".rpmsave") ||
1154 endswith(filename, ".rpmorig") ||
1155 endswith(filename, ".dpkg-old") ||
1156 endswith(filename, ".dpkg-new") ||
1157 endswith(filename, ".swp");
1158}
1159
3a0ecb08
LP		 1160int fd_nonblock(int fd, bool nonblock) {
1161 int flags;
1162
1163 assert(fd >= 0);
1164
1165 if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
1166 return -errno;
1167
1168 if (nonblock)
1169 flags |= O_NONBLOCK;
1170 else
1171 flags &= ~O_NONBLOCK;
1172
1173 if (fcntl(fd, F_SETFL, flags) < 0)
1174 return -errno;
1175
1176 return 0;
1177}
1178
1179int fd_cloexec(int fd, bool cloexec) {
1180 int flags;
1181
1182 assert(fd >= 0);
1183
1184 if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
1185 return -errno;
1186
1187 if (cloexec)
1188 flags |= FD_CLOEXEC;
1189 else
1190 flags &= ~FD_CLOEXEC;
1191
1192 if (fcntl(fd, F_SETFD, flags) < 0)
1193 return -errno;
1194
1195 return 0;
1196}
1197
a0d40ac5
LP		 1198int close_all_fds(const int except[], unsigned n_except) {
1199 DIR *d;
1200 struct dirent *de;
1201 int r = 0;
1202
1203 if (!(d = opendir("/proc/self/fd")))
1204 return -errno;
1205
1206 while ((de = readdir(d))) {
a7610064 1207 int fd = -1;
a0d40ac5
LP		 1208
1209 if (de->d_name[0] == '.')
1210 continue;
1211
1212 if ((r = safe_atoi(de->d_name, &fd)) < 0)
1213 goto finish;
1214
1215 if (fd < 3)
1216 continue;
1217
1218 if (fd == dirfd(d))
1219 continue;
1220
1221 if (except) {
1222 bool found;
1223 unsigned i;
1224
1225 found = false;
1226 for (i = 0; i < n_except; i++)
1227 if (except[i] == fd) {
1228 found = true;
1229 break;
1230 }
1231
1232 if (found)
1233 continue;
1234 }
1235
2f357920
LP		 1236 if ((r = close_nointr(fd)) < 0) {
1237 /* Valgrind has its own FD and doesn't want to have it closed */
1238 if (errno != EBADF)
1239 goto finish;
1240 }
a0d40ac5
LP		 1241 }
1242
2f357920
LP		 1243 r = 0;
1244
a0d40ac5
LP		 1245finish:
1246 closedir(d);
1247 return r;
1248}
1249
db12775d
LP		 1250bool chars_intersect(const char *a, const char *b) {
1251 const char *p;
1252
1253 /* Returns true if any of the chars in a are in b. */
1254 for (p = a; *p; p++)
1255 if (strchr(b, *p))
1256 return true;
1257
1258 return false;
1259}
1260
8b6c7120
LP		 1261char *format_timestamp(char *buf, size_t l, usec_t t) {
1262 struct tm tm;
1263 time_t sec;
1264
1265 assert(buf);
1266 assert(l > 0);
1267
1268 if (t <= 0)
1269 return NULL;
1270
1271 sec = (time_t) t / USEC_PER_SEC;
1272
1273 if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
1274 return NULL;
1275
1276 return buf;
1277}
1278
42856c10
LP		 1279bool fstype_is_network(const char *fstype) {
1280 static const char * const table[] = {
1281 "cifs",
1282 "smbfs",
1283 "ncpfs",
1284 "nfs",
1285 "nfs4"
1286 };
1287
1288 unsigned i;
1289
1290 for (i = 0; i < ELEMENTSOF(table); i++)
1291 if (streq(table[i], fstype))
1292 return true;
1293
1294 return false;
1295}
1296
1dccbe19
LP		 1297static const char *const ioprio_class_table[] = {
1298 [IOPRIO_CLASS_NONE] = "none",
1299 [IOPRIO_CLASS_RT] = "realtime",
1300 [IOPRIO_CLASS_BE] = "best-effort",
1301 [IOPRIO_CLASS_IDLE] = "idle"
1302};
1303
1304DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int);
1305
1306static const char *const sigchld_code_table[] = {
1307 [CLD_EXITED] = "exited",
1308 [CLD_KILLED] = "killed",
1309 [CLD_DUMPED] = "dumped",
1310 [CLD_TRAPPED] = "trapped",
1311 [CLD_STOPPED] = "stopped",
1312 [CLD_CONTINUED] = "continued",
1313};
1314
1315DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
1316
1317static const char *const log_facility_table[LOG_NFACILITIES] = {
1318 [LOG_FAC(LOG_KERN)] = "kern",
1319 [LOG_FAC(LOG_USER)] = "user",
1320 [LOG_FAC(LOG_MAIL)] = "mail",
1321 [LOG_FAC(LOG_DAEMON)] = "daemon",
1322 [LOG_FAC(LOG_AUTH)] = "auth",
1323 [LOG_FAC(LOG_SYSLOG)] = "syslog",
1324 [LOG_FAC(LOG_LPR)] = "lpr",
1325 [LOG_FAC(LOG_NEWS)] = "news",
1326 [LOG_FAC(LOG_UUCP)] = "uucp",
1327 [LOG_FAC(LOG_CRON)] = "cron",
1328 [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
1329 [LOG_FAC(LOG_FTP)] = "ftp",
1330 [LOG_FAC(LOG_LOCAL0)] = "local0",
1331 [LOG_FAC(LOG_LOCAL1)] = "local1",
1332 [LOG_FAC(LOG_LOCAL2)] = "local2",
1333 [LOG_FAC(LOG_LOCAL3)] = "local3",
1334 [LOG_FAC(LOG_LOCAL4)] = "local4",
1335 [LOG_FAC(LOG_LOCAL5)] = "local5",
1336 [LOG_FAC(LOG_LOCAL6)] = "local6",
1337 [LOG_FAC(LOG_LOCAL7)] = "local7"
1338};
1339
1340DEFINE_STRING_TABLE_LOOKUP(log_facility, int);
1341
1342static const char *const log_level_table[] = {
1343 [LOG_EMERG] = "emerg",
1344 [LOG_ALERT] = "alert",
1345 [LOG_CRIT] = "crit",
1346 [LOG_ERR] = "err",
1347 [LOG_WARNING] = "warning",
1348 [LOG_NOTICE] = "notice",
1349 [LOG_INFO] = "info",
1350 [LOG_DEBUG] = "debug"
1351};
1352
1353DEFINE_STRING_TABLE_LOOKUP(log_level, int);
1354
1355static const char* const sched_policy_table[] = {
1356 [SCHED_OTHER] = "other",
1357 [SCHED_BATCH] = "batch",
1358 [SCHED_IDLE] = "idle",
1359 [SCHED_FIFO] = "fifo",
1360 [SCHED_RR] = "rr"
1361};
1362
1363DEFINE_STRING_TABLE_LOOKUP(sched_policy, int);
1364
1365static const char* const rlimit_table[] = {
1366 [RLIMIT_CPU] = "LimitCPU",
1367 [RLIMIT_FSIZE] = "LimitFSIZE",
1368 [RLIMIT_DATA] = "LimitDATA",
1369 [RLIMIT_STACK] = "LimitSTACK",
1370 [RLIMIT_CORE] = "LimitCORE",
1371 [RLIMIT_RSS] = "LimitRSS",
1372 [RLIMIT_NOFILE] = "LimitNOFILE",
1373 [RLIMIT_AS] = "LimitAS",
1374 [RLIMIT_NPROC] = "LimitNPROC",
1375 [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
1376 [RLIMIT_LOCKS] = "LimitLOCKS",
1377 [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
1378 [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
1379 [RLIMIT_NICE] = "LimitNICE",
1380 [RLIMIT_RTPRIO] = "LimitRTPRIO",
1381 [RLIMIT_RTTIME] = "LimitRTTIME"
1382};
1383
1384DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
Unnamed repository; edit this file 'description' to name the repository.