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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>
3177a7fa 45#include <ctype.h>
5b6319dc 46#include <sys/prctl.h>
ef2f1067
LP		 47#include <sys/utsname.h>
48#include <pwd.h>
4fd5948e 49#include <netinet/ip.h>
60918275
LP		 50
51#include "macro.h"
52#include "util.h"
1dccbe19
LP		 53#include "ioprio.h"
54#include "missing.h"
a9f5d454 55#include "log.h"
65d2ebdc 56#include "strv.h"
60918275 57
e05797fb
LP		 58bool streq_ptr(const char *a, const char *b) {
59
60 /* Like streq(), but tries to make sense of NULL pointers */
61
62 if (a && b)
63 return streq(a, b);
64
65 if (!a && !b)
66 return true;
67
68 return false;
69}
70
47be870b 71usec_t now(clockid_t clock_id) {
60918275
LP		 72 struct timespec ts;
73
47be870b 74 assert_se(clock_gettime(clock_id, &ts) == 0);
60918275
LP		 75
76 return timespec_load(&ts);
77}
78
63983207 79dual_timestamp* dual_timestamp_get(dual_timestamp *ts) {
871d7de4
LP		 80 assert(ts);
81
82 ts->realtime = now(CLOCK_REALTIME);
83 ts->monotonic = now(CLOCK_MONOTONIC);
84
85 return ts;
86}
87
60918275
LP		 88usec_t timespec_load(const struct timespec *ts) {
89 assert(ts);
90
91 return
92 (usec_t) ts->tv_sec * USEC_PER_SEC +
93 (usec_t) ts->tv_nsec / NSEC_PER_USEC;
94}
95
96struct timespec *timespec_store(struct timespec *ts, usec_t u) {
97 assert(ts);
98
99 ts->tv_sec = (time_t) (u / USEC_PER_SEC);
100 ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
101
102 return ts;
103}
104
105usec_t timeval_load(const struct timeval *tv) {
106 assert(tv);
107
108 return
109 (usec_t) tv->tv_sec * USEC_PER_SEC +
110 (usec_t) tv->tv_usec;
111}
112
113struct timeval *timeval_store(struct timeval *tv, usec_t u) {
114 assert(tv);
115
116 tv->tv_sec = (time_t) (u / USEC_PER_SEC);
117 tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
118
119 return tv;
120}
121
122bool endswith(const char *s, const char *postfix) {
123 size_t sl, pl;
124
125 assert(s);
126 assert(postfix);
127
128 sl = strlen(s);
129 pl = strlen(postfix);
130
d4d0d4db
LP		 131 if (pl == 0)
132 return true;
133
60918275
LP		 134 if (sl < pl)
135 return false;
136
137 return memcmp(s + sl - pl, postfix, pl) == 0;
138}
139
140bool startswith(const char *s, const char *prefix) {
141 size_t sl, pl;
142
143 assert(s);
144 assert(prefix);
145
146 sl = strlen(s);
147 pl = strlen(prefix);
148
d4d0d4db
LP		 149 if (pl == 0)
150 return true;
151
60918275
LP		 152 if (sl < pl)
153 return false;
154
155 return memcmp(s, prefix, pl) == 0;
156}
157
3177a7fa
MAP		 158bool startswith_no_case(const char *s, const char *prefix) {
159 size_t sl, pl;
160 unsigned i;
161
162 assert(s);
163 assert(prefix);
164
165 sl = strlen(s);
166 pl = strlen(prefix);
167
168 if (pl == 0)
169 return true;
170
171 if (sl < pl)
172 return false;
173
174 for(i = 0; i < pl; ++i) {
175 if (tolower(s[i]) != tolower(prefix[i]))
176 return false;
177 }
178
179 return true;
180}
181
79d6d816
LP		 182bool first_word(const char *s, const char *word) {
183 size_t sl, wl;
184
185 assert(s);
186 assert(word);
187
188 sl = strlen(s);
189 wl = strlen(word);
190
191 if (sl < wl)
192 return false;
193
d4d0d4db
LP		 194 if (wl == 0)
195 return true;
196
79d6d816
LP		 197 if (memcmp(s, word, wl) != 0)
198 return false;
199
d4d0d4db
LP		 200 return s[wl] == 0 ||
201 strchr(WHITESPACE, s[wl]);
79d6d816
LP		 202}
203
42f4e3c4 204int close_nointr(int fd) {
60918275
LP		 205 assert(fd >= 0);
206
207 for (;;) {
208 int r;
209
210 if ((r = close(fd)) >= 0)
211 return r;
212
213 if (errno != EINTR)
214 return r;
215 }
216}
85261803 217
85f136b5 218void close_nointr_nofail(int fd) {
80876c20 219 int saved_errno = errno;
85f136b5
LP		 220
221 /* like close_nointr() but cannot fail, and guarantees errno
222 * is unchanged */
223
224 assert_se(close_nointr(fd) == 0);
80876c20
LP		 225
226 errno = saved_errno;
85f136b5
LP		 227}
228
5b6319dc
LP		 229void close_many(const int fds[], unsigned n_fd) {
230 unsigned i;
231
232 for (i = 0; i < n_fd; i++)
233 close_nointr_nofail(fds[i]);
234}
235
85261803
LP		 236int parse_boolean(const char *v) {
237 assert(v);
238
44d8db9e 239 if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
85261803 240 return 1;
44d8db9e 241 else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
85261803
LP		 242 return 0;
243
244 return -EINVAL;
245}
246
3ba686c1
LP		 247int parse_pid(const char *s, pid_t* ret_pid) {
248 unsigned long ul;
249 pid_t pid;
250 int r;
251
252 assert(s);
253 assert(ret_pid);
254
255 if ((r = safe_atolu(s, &ul)) < 0)
256 return r;
257
258 pid = (pid_t) ul;
259
260 if ((unsigned long) pid != ul)
261 return -ERANGE;
262
263 if (pid <= 0)
264 return -ERANGE;
265
266 *ret_pid = pid;
267 return 0;
268}
269
85261803
LP		 270int safe_atou(const char *s, unsigned *ret_u) {
271 char *x = NULL;
034c6ed7 272 unsigned long l;
85261803
LP		 273
274 assert(s);
275 assert(ret_u);
276
277 errno = 0;
278 l = strtoul(s, &x, 0);
279
280 if (!x || *x || errno)
281 return errno ? -errno : -EINVAL;
282
034c6ed7 283 if ((unsigned long) (unsigned) l != l)
85261803
LP		 284 return -ERANGE;
285
286 *ret_u = (unsigned) l;
287 return 0;
288}
289
290int safe_atoi(const char *s, int *ret_i) {
291 char *x = NULL;
034c6ed7 292 long l;
85261803
LP		 293
294 assert(s);
295 assert(ret_i);
296
297 errno = 0;
298 l = strtol(s, &x, 0);
299
300 if (!x || *x || errno)
301 return errno ? -errno : -EINVAL;
302
034c6ed7 303 if ((long) (int) l != l)
85261803
LP		 304 return -ERANGE;
305
034c6ed7
LP		 306 *ret_i = (int) l;
307 return 0;
308}
309
310int safe_atolu(const char *s, long unsigned *ret_lu) {
311 char *x = NULL;
312 unsigned long l;
313
314 assert(s);
315 assert(ret_lu);
316
317 errno = 0;
318 l = strtoul(s, &x, 0);
319
320 if (!x || *x || errno)
321 return errno ? -errno : -EINVAL;
322
323 *ret_lu = l;
324 return 0;
325}
326
327int safe_atoli(const char *s, long int *ret_li) {
328 char *x = NULL;
329 long l;
330
331 assert(s);
332 assert(ret_li);
333
334 errno = 0;
335 l = strtol(s, &x, 0);
336
337 if (!x || *x || errno)
338 return errno ? -errno : -EINVAL;
339
340 *ret_li = l;
341 return 0;
342}
343
344int safe_atollu(const char *s, long long unsigned *ret_llu) {
345 char *x = NULL;
346 unsigned long long l;
347
348 assert(s);
349 assert(ret_llu);
350
351 errno = 0;
352 l = strtoull(s, &x, 0);
353
354 if (!x || *x || errno)
355 return errno ? -errno : -EINVAL;
356
357 *ret_llu = l;
358 return 0;
359}
360
361int safe_atolli(const char *s, long long int *ret_lli) {
362 char *x = NULL;
363 long long l;
364
365 assert(s);
366 assert(ret_lli);
367
368 errno = 0;
369 l = strtoll(s, &x, 0);
370
371 if (!x || *x || errno)
372 return errno ? -errno : -EINVAL;
373
374 *ret_lli = l;
85261803
LP		 375 return 0;
376}
a41e8209 377
a41e8209 378/* Split a string into words. */
65d2ebdc 379char *split(const char *c, size_t *l, const char *separator, char **state) {
a41e8209
LP		 380 char *current;
381
382 current = *state ? *state : (char*) c;
383
384 if (!*current || *c == 0)
385 return NULL;
386
65d2ebdc
LP		 387 current += strspn(current, separator);
388 *l = strcspn(current, separator);
82919e3d
LP		 389 *state = current+*l;
390
391 return (char*) current;
392}
393
034c6ed7
LP		 394/* Split a string into words, but consider strings enclosed in '' and
395 * "" as words even if they include spaces. */
396char *split_quoted(const char *c, size_t *l, char **state) {
397 char *current;
398
399 current = *state ? *state : (char*) c;
400
401 if (!*current || *c == 0)
402 return NULL;
403
404 current += strspn(current, WHITESPACE);
405
406 if (*current == '\'') {
407 current ++;
408 *l = strcspn(current, "'");
409 *state = current+*l;
410
411 if (**state == '\'')
412 (*state)++;
413 } else if (*current == '\"') {
414 current ++;
b858b600 415 *l = strcspn(current, "\"");
034c6ed7
LP		 416 *state = current+*l;
417
418 if (**state == '\"')
419 (*state)++;
420 } else {
421 *l = strcspn(current, WHITESPACE);
422 *state = current+*l;
423 }
424
44d8db9e
LP		 425 /* FIXME: Cannot deal with strings that have spaces AND ticks
426 * in them */
427
034c6ed7
LP		 428 return (char*) current;
429}
430
65d2ebdc
LP		 431char **split_path_and_make_absolute(const char *p) {
432 char **l;
433 assert(p);
434
435 if (!(l = strv_split(p, ":")))
436 return NULL;
437
438 if (!strv_path_make_absolute_cwd(l)) {
439 strv_free(l);
440 return NULL;
441 }
442
443 return l;
444}
445
034c6ed7
LP		 446int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
447 int r;
448 FILE *f;
449 char fn[132], line[256], *p;
bb00e604 450 long unsigned ppid;
034c6ed7
LP		 451
452 assert(pid >= 0);
453 assert(_ppid);
454
bb00e604 455 assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1));
034c6ed7
LP		 456 fn[sizeof(fn)-1] = 0;
457
458 if (!(f = fopen(fn, "r")))
459 return -errno;
460
461 if (!(fgets(line, sizeof(line), f))) {
462 r = -errno;
463 fclose(f);
464 return r;
465 }
466
467 fclose(f);
468
469 /* Let's skip the pid and comm fields. The latter is enclosed
470 * in () but does not escape any () in its value, so let's
471 * skip over it manually */
472
473 if (!(p = strrchr(line, ')')))
474 return -EIO;
475
476 p++;
477
478 if (sscanf(p, " "
479 "%*c " /* state */
bb00e604 480 "%lu ", /* ppid */
034c6ed7
LP		 481 &ppid) != 1)
482 return -EIO;
483
bb00e604 484 if ((long unsigned) (pid_t) ppid != ppid)
034c6ed7
LP		 485 return -ERANGE;
486
487 *_ppid = (pid_t) ppid;
488
489 return 0;
490}
491
492int write_one_line_file(const char *fn, const char *line) {
493 FILE *f;
494 int r;
495
496 assert(fn);
497 assert(line);
498
499 if (!(f = fopen(fn, "we")))
500 return -errno;
501
502 if (fputs(line, f) < 0) {
503 r = -errno;
504 goto finish;
505 }
506
507 r = 0;
508finish:
509 fclose(f);
510 return r;
511}
512
513int read_one_line_file(const char *fn, char **line) {
514 FILE *f;
515 int r;
11316633 516 char t[2048], *c;
034c6ed7
LP		 517
518 assert(fn);
519 assert(line);
520
521 if (!(f = fopen(fn, "re")))
522 return -errno;
523
524 if (!(fgets(t, sizeof(t), f))) {
525 r = -errno;
526 goto finish;
527 }
528
529 if (!(c = strdup(t))) {
530 r = -ENOMEM;
531 goto finish;
532 }
533
534 *line = c;
535 r = 0;
536
537finish:
538 fclose(f);
539 return r;
540}
44d8db9e 541
7072ced8
LP		 542char *truncate_nl(char *s) {
543 assert(s);
544
545 s[strcspn(s, NEWLINE)] = 0;
546 return s;
547}
548
549int get_process_name(pid_t pid, char **name) {
550 char *p;
551 int r;
552
553 assert(pid >= 1);
554 assert(name);
555
bb00e604 556 if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0)
7072ced8
LP		 557 return -ENOMEM;
558
559 r = read_one_line_file(p, name);
560 free(p);
561
562 if (r < 0)
563 return r;
564
565 truncate_nl(*name);
566 return 0;
567}
568
44d8db9e
LP		 569char *strappend(const char *s, const char *suffix) {
570 size_t a, b;
571 char *r;
572
573 assert(s);
574 assert(suffix);
575
576 a = strlen(s);
577 b = strlen(suffix);
578
579 if (!(r = new(char, a+b+1)))
580 return NULL;
581
582 memcpy(r, s, a);
583 memcpy(r+a, suffix, b);
584 r[a+b] = 0;
585
586 return r;
587}
87f0e418
LP		 588
589int readlink_malloc(const char *p, char **r) {
590 size_t l = 100;
591
592 assert(p);
593 assert(r);
594
595 for (;;) {
596 char *c;
597 ssize_t n;
598
599 if (!(c = new(char, l)))
600 return -ENOMEM;
601
602 if ((n = readlink(p, c, l-1)) < 0) {
603 int ret = -errno;
604 free(c);
605 return ret;
606 }
607
608 if ((size_t) n < l-1) {
609 c[n] = 0;
610 *r = c;
611 return 0;
612 }
613
614 free(c);
615 l *= 2;
616 }
617}
618
2c7108c4
LP		 619int readlink_and_make_absolute(const char *p, char **r) {
620 char *target, *k;
621 int j;
622
623 assert(p);
624 assert(r);
625
626 if ((j = readlink_malloc(p, &target)) < 0)
627 return j;
628
629 k = file_in_same_dir(p, target);
630 free(target);
631
632 if (!k)
633 return -ENOMEM;
634
635 *r = k;
636 return 0;
637}
638
87f0e418
LP		 639char *file_name_from_path(const char *p) {
640 char *r;
641
642 assert(p);
643
644 if ((r = strrchr(p, '/')))
645 return r + 1;
646
647 return (char*) p;
648}
0301abf4
LP		 649
650bool path_is_absolute(const char *p) {
651 assert(p);
652
653 return p[0] == '/';
654}
655
656bool is_path(const char *p) {
657
658 return !!strchr(p, '/');
659}
660
661char *path_make_absolute(const char *p, const char *prefix) {
662 char *r;
663
664 assert(p);
665
65d2ebdc
LP		 666 /* Makes every item in the list an absolute path by prepending
667 * the prefix, if specified and necessary */
668
0301abf4
LP		 669 if (path_is_absolute(p) || !prefix)
670 return strdup(p);
671
672 if (asprintf(&r, "%s/%s", prefix, p) < 0)
673 return NULL;
674
675 return r;
676}
2a987ee8 677
65d2ebdc
LP		 678char *path_make_absolute_cwd(const char *p) {
679 char *cwd, *r;
680
681 assert(p);
682
683 /* Similar to path_make_absolute(), but prefixes with the
684 * current working directory. */
685
686 if (path_is_absolute(p))
687 return strdup(p);
688
689 if (!(cwd = get_current_dir_name()))
690 return NULL;
691
692 r = path_make_absolute(p, cwd);
693 free(cwd);
694
695 return r;
696}
697
698char **strv_path_make_absolute_cwd(char **l) {
699 char **s;
700
701 /* Goes through every item in the string list and makes it
702 * absolute. This works in place and won't rollback any
703 * changes on failure. */
704
705 STRV_FOREACH(s, l) {
706 char *t;
707
708 if (!(t = path_make_absolute_cwd(*s)))
709 return NULL;
710
711 free(*s);
712 *s = t;
713 }
714
715 return l;
716}
717
c3f6d675
LP		 718char **strv_path_canonicalize(char **l) {
719 char **s;
720 unsigned k = 0;
721 bool enomem = false;
722
723 if (strv_isempty(l))
724 return l;
725
726 /* Goes through every item in the string list and canonicalize
727 * the path. This works in place and won't rollback any
728 * changes on failure. */
729
730 STRV_FOREACH(s, l) {
731 char *t, *u;
732
733 t = path_make_absolute_cwd(*s);
734 free(*s);
735
736 if (!t) {
737 enomem = true;
738 continue;
739 }
740
741 errno = 0;
742 u = canonicalize_file_name(t);
743 free(t);
744
745 if (!u) {
746 if (errno == ENOMEM || !errno)
747 enomem = true;
748
749 continue;
750 }
751
752 l[k++] = u;
753 }
754
755 l[k] = NULL;
756
757 if (enomem)
758 return NULL;
759
760 return l;
761}
762
2a987ee8
LP		 763int reset_all_signal_handlers(void) {
764 int sig;
765
766 for (sig = 1; sig < _NSIG; sig++) {
767 struct sigaction sa;
768
769 if (sig == SIGKILL || sig == SIGSTOP)
770 continue;
771
772 zero(sa);
773 sa.sa_handler = SIG_DFL;
431c32bf 774 sa.sa_flags = SA_RESTART;
2a987ee8
LP		 775
776 /* On Linux the first two RT signals are reserved by
777 * glibc, and sigaction() will return EINVAL for them. */
778 if ((sigaction(sig, &sa, NULL) < 0))
779 if (errno != EINVAL)
780 return -errno;
781 }
782
8e274523 783 return 0;
2a987ee8 784}
4a72ff34
LP		 785
786char *strstrip(char *s) {
787 char *e, *l = NULL;
788
789 /* Drops trailing whitespace. Modifies the string in
790 * place. Returns pointer to first non-space character */
791
792 s += strspn(s, WHITESPACE);
793
794 for (e = s; *e; e++)
795 if (!strchr(WHITESPACE, *e))
796 l = e;
797
798 if (l)
799 *(l+1) = 0;
800 else
801 *s = 0;
802
803 return s;
4a72ff34
LP		 804}
805
ee9b5e01
LP		 806char *delete_chars(char *s, const char *bad) {
807 char *f, *t;
808
809 /* Drops all whitespace, regardless where in the string */
810
811 for (f = s, t = s; *f; f++) {
812 if (strchr(bad, *f))
813 continue;
814
815 *(t++) = *f;
816 }
817
818 *t = 0;
819
820 return s;
821}
822
4a72ff34
LP		 823char *file_in_same_dir(const char *path, const char *filename) {
824 char *e, *r;
825 size_t k;
826
827 assert(path);
828 assert(filename);
829
830 /* This removes the last component of path and appends
831 * filename, unless the latter is absolute anyway or the
832 * former isn't */
833
834 if (path_is_absolute(filename))
835 return strdup(filename);
836
837 if (!(e = strrchr(path, '/')))
838 return strdup(filename);
839
840 k = strlen(filename);
841 if (!(r = new(char, e-path+1+k+1)))
842 return NULL;
843
844 memcpy(r, path, e-path+1);
845 memcpy(r+(e-path)+1, filename, k+1);
846
847 return r;
848}
fb624d04 849
8c6db833
LP		 850int safe_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) {
851 struct stat st;
852
853 if (mkdir(path, mode) >= 0)
854 if (chmod_and_chown(path, mode, uid, gid) < 0)
855 return -errno;
856
857 if (lstat(path, &st) < 0)
858 return -errno;
859
860 if ((st.st_mode & 0777) != mode ||
861 st.st_uid != uid ||
862 st.st_gid != gid ||
863 !S_ISDIR(st.st_mode)) {
864 errno = EEXIST;
865 return -errno;
866 }
867
868 return 0;
869}
870
871
a9f5d454
LP		 872int mkdir_parents(const char *path, mode_t mode) {
873 const char *p, *e;
874
875 assert(path);
876
877 /* Creates every parent directory in the path except the last
878 * component. */
879
880 p = path + strspn(path, "/");
881 for (;;) {
882 int r;
883 char *t;
884
885 e = p + strcspn(p, "/");
886 p = e + strspn(e, "/");
887
888 /* Is this the last component? If so, then we're
889 * done */
890 if (*p == 0)
891 return 0;
892
893 if (!(t = strndup(path, e - path)))
894 return -ENOMEM;
895
896 r = mkdir(t, mode);
897
898 free(t);
899
900 if (r < 0 && errno != EEXIST)
901 return -errno;
902 }
903}
904
bbd67135
LP		 905int mkdir_p(const char *path, mode_t mode) {
906 int r;
907
908 /* Like mkdir -p */
909
910 if ((r = mkdir_parents(path, mode)) < 0)
911 return r;
912
913 if (mkdir(path, mode) < 0)
914 return -errno;
915
916 return 0;
917}
918
c32dd69b
LP		 919int rmdir_parents(const char *path, const char *stop) {
920 size_t l;
921 int r = 0;
922
923 assert(path);
924 assert(stop);
925
926 l = strlen(path);
927
928 /* Skip trailing slashes */
929 while (l > 0 && path[l-1] == '/')
930 l--;
931
932 while (l > 0) {
933 char *t;
934
935 /* Skip last component */
936 while (l > 0 && path[l-1] != '/')
937 l--;
938
939 /* Skip trailing slashes */
940 while (l > 0 && path[l-1] == '/')
941 l--;
942
943 if (l <= 0)
944 break;
945
946 if (!(t = strndup(path, l)))
947 return -ENOMEM;
948
949 if (path_startswith(stop, t)) {
950 free(t);
951 return 0;
952 }
953
954 r = rmdir(t);
955 free(t);
956
957 if (r < 0)
958 if (errno != ENOENT)
959 return -errno;
960 }
961
962 return 0;
963}
964
965
fb624d04
LP		 966char hexchar(int x) {
967 static const char table[16] = "0123456789abcdef";
968
969 return table[x & 15];
970}
4fe88d28
LP		 971
972int unhexchar(char c) {
973
974 if (c >= '0' && c <= '9')
975 return c - '0';
976
977 if (c >= 'a' && c <= 'f')
ea430986 978 return c - 'a' + 10;
4fe88d28
LP		 979
980 if (c >= 'A' && c <= 'F')
ea430986 981 return c - 'A' + 10;
4fe88d28
LP		 982
983 return -1;
984}
985
986char octchar(int x) {
987 return '0' + (x & 7);
988}
989
990int unoctchar(char c) {
991
992 if (c >= '0' && c <= '7')
993 return c - '0';
994
995 return -1;
996}
997
5af98f82
LP		 998char decchar(int x) {
999 return '0' + (x % 10);
1000}
1001
1002int undecchar(char c) {
1003
1004 if (c >= '0' && c <= '9')
1005 return c - '0';
1006
1007 return -1;
1008}
1009
4fe88d28
LP		 1010char *cescape(const char *s) {
1011 char *r, *t;
1012 const char *f;
1013
1014 assert(s);
1015
1016 /* Does C style string escaping. */
1017
1018 if (!(r = new(char, strlen(s)*4 + 1)))
1019 return NULL;
1020
1021 for (f = s, t = r; *f; f++)
1022
1023 switch (*f) {
1024
1025 case '\a':
1026 *(t++) = '\\';
1027 *(t++) = 'a';
1028 break;
1029 case '\b':
1030 *(t++) = '\\';
1031 *(t++) = 'b';
1032 break;
1033 case '\f':
1034 *(t++) = '\\';
1035 *(t++) = 'f';
1036 break;
1037 case '\n':
1038 *(t++) = '\\';
1039 *(t++) = 'n';
1040 break;
1041 case '\r':
1042 *(t++) = '\\';
1043 *(t++) = 'r';
1044 break;
1045 case '\t':
1046 *(t++) = '\\';
1047 *(t++) = 't';
1048 break;
1049 case '\v':
1050 *(t++) = '\\';
1051 *(t++) = 'v';
1052 break;
1053 case '\\':
1054 *(t++) = '\\';
1055 *(t++) = '\\';
1056 break;
1057 case '"':
1058 *(t++) = '\\';
1059 *(t++) = '"';
1060 break;
1061 case '\'':
1062 *(t++) = '\\';
1063 *(t++) = '\'';
1064 break;
1065
1066 default:
1067 /* For special chars we prefer octal over
1068 * hexadecimal encoding, simply because glib's
1069 * g_strescape() does the same */
1070 if ((*f < ' ') || (*f >= 127)) {
1071 *(t++) = '\\';
1072 *(t++) = octchar((unsigned char) *f >> 6);
1073 *(t++) = octchar((unsigned char) *f >> 3);
1074 *(t++) = octchar((unsigned char) *f);
1075 } else
1076 *(t++) = *f;
1077 break;
1078 }
1079
1080 *t = 0;
1081
1082 return r;
1083}
1084
1085char *cunescape(const char *s) {
1086 char *r, *t;
1087 const char *f;
1088
1089 assert(s);
1090
1091 /* Undoes C style string escaping */
1092
1093 if (!(r = new(char, strlen(s)+1)))
1094 return r;
1095
1096 for (f = s, t = r; *f; f++) {
1097
1098 if (*f != '\\') {
1099 *(t++) = *f;
1100 continue;
1101 }
1102
1103 f++;
1104
1105 switch (*f) {
1106
1107 case 'a':
1108 *(t++) = '\a';
1109 break;
1110 case 'b':
1111 *(t++) = '\b';
1112 break;
1113 case 'f':
1114 *(t++) = '\f';
1115 break;
1116 case 'n':
1117 *(t++) = '\n';
1118 break;
1119 case 'r':
1120 *(t++) = '\r';
1121 break;
1122 case 't':
1123 *(t++) = '\t';
1124 break;
1125 case 'v':
1126 *(t++) = '\v';
1127 break;
1128 case '\\':
1129 *(t++) = '\\';
1130 break;
1131 case '"':
1132 *(t++) = '"';
1133 break;
1134 case '\'':
1135 *(t++) = '\'';
1136 break;
1137
1138 case 'x': {
1139 /* hexadecimal encoding */
1140 int a, b;
1141
1142 if ((a = unhexchar(f[1])) < 0 ||
1143 (b = unhexchar(f[2])) < 0) {
1144 /* Invalid escape code, let's take it literal then */
1145 *(t++) = '\\';
1146 *(t++) = 'x';
1147 } else {
1148 *(t++) = (char) ((a << 4) | b);
1149 f += 2;
1150 }
1151
1152 break;
1153 }
1154
1155 case '0':
1156 case '1':
1157 case '2':
1158 case '3':
1159 case '4':
1160 case '5':
1161 case '6':
1162 case '7': {
1163 /* octal encoding */
1164 int a, b, c;
1165
1166 if ((a = unoctchar(f[0])) < 0 ||
1167 (b = unoctchar(f[1])) < 0 ||
1168 (c = unoctchar(f[2])) < 0) {
1169 /* Invalid escape code, let's take it literal then */
1170 *(t++) = '\\';
1171 *(t++) = f[0];
1172 } else {
1173 *(t++) = (char) ((a << 6) | (b << 3) | c);
1174 f += 2;
1175 }
1176
1177 break;
1178 }
1179
1180 case 0:
1181 /* premature end of string.*/
1182 *(t++) = '\\';
1183 goto finish;
1184
1185 default:
1186 /* Invalid escape code, let's take it literal then */
1187 *(t++) = '\\';
1188 *(t++) = 'f';
1189 break;
1190 }
1191 }
1192
1193finish:
1194 *t = 0;
1195 return r;
1196}
1197
1198
1199char *xescape(const char *s, const char *bad) {
1200 char *r, *t;
1201 const char *f;
1202
1203 /* Escapes all chars in bad, in addition to \ and all special
1204 * chars, in \xFF style escaping. May be reversed with
1205 * cunescape. */
1206
1207 if (!(r = new(char, strlen(s)*4+1)))
1208 return NULL;
1209
1210 for (f = s, t = r; *f; f++) {
1211
b866264a
LP		 1212 if ((*f < ' ') || (*f >= 127) ||
1213 (*f == '\\') || strchr(bad, *f)) {
4fe88d28
LP		 1214 *(t++) = '\\';
1215 *(t++) = 'x';
1216 *(t++) = hexchar(*f >> 4);
1217 *(t++) = hexchar(*f);
1218 } else
1219 *(t++) = *f;
1220 }
1221
1222 *t = 0;
1223
1224 return r;
1225}
1226
ea430986 1227char *bus_path_escape(const char *s) {
ea430986
LP		 1228 char *r, *t;
1229 const char *f;
1230
47be870b
LP		 1231 assert(s);
1232
ea430986
LP		 1233 /* Escapes all chars that D-Bus' object path cannot deal
1234 * with. Can be reverse with bus_path_unescape() */
1235
1236 if (!(r = new(char, strlen(s)*3+1)))
1237 return NULL;
1238
1239 for (f = s, t = r; *f; f++) {
1240
1241 if (!(*f >= 'A' && *f <= 'Z') &&
1242 !(*f >= 'a' && *f <= 'z') &&
1243 !(*f >= '0' && *f <= '9')) {
1244 *(t++) = '_';
1245 *(t++) = hexchar(*f >> 4);
1246 *(t++) = hexchar(*f);
1247 } else
1248 *(t++) = *f;
1249 }
1250
1251 *t = 0;
1252
1253 return r;
1254}
1255
9e2f7c11 1256char *bus_path_unescape(const char *f) {
ea430986 1257 char *r, *t;
ea430986 1258
9e2f7c11 1259 assert(f);
47be870b 1260
9e2f7c11 1261 if (!(r = strdup(f)))
ea430986
LP		 1262 return NULL;
1263
9e2f7c11 1264 for (t = r; *f; f++) {
ea430986
LP		 1265
1266 if (*f == '_') {
1267 int a, b;
1268
1269 if ((a = unhexchar(f[1])) < 0 ||
1270 (b = unhexchar(f[2])) < 0) {
1271 /* Invalid escape code, let's take it literal then */
1272 *(t++) = '_';
1273 } else {
1274 *(t++) = (char) ((a << 4) | b);
1275 f += 2;
1276 }
1277 } else
1278 *(t++) = *f;
1279 }
1280
1281 *t = 0;
1282
1283 return r;
1284}
1285
4fe88d28
LP		 1286char *path_kill_slashes(char *path) {
1287 char *f, *t;
1288 bool slash = false;
1289
1290 /* Removes redundant inner and trailing slashes. Modifies the
1291 * passed string in-place.
1292 *
1293 * ///foo///bar/ becomes /foo/bar
1294 */
1295
1296 for (f = path, t = path; *f; f++) {
1297
1298 if (*f == '/') {
1299 slash = true;
1300 continue;
1301 }
1302
1303 if (slash) {
1304 slash = false;
1305 *(t++) = '/';
1306 }
1307
1308 *(t++) = *f;
1309 }
1310
1311 /* Special rule, if we are talking of the root directory, a
1312 trailing slash is good */
1313
1314 if (t == path && slash)
1315 *(t++) = '/';
1316
1317 *t = 0;
1318 return path;
1319}
1320
1321bool path_startswith(const char *path, const char *prefix) {
1322 assert(path);
1323 assert(prefix);
1324
1325 if ((path[0] == '/') != (prefix[0] == '/'))
1326 return false;
1327
1328 for (;;) {
1329 size_t a, b;
1330
1331 path += strspn(path, "/");
1332 prefix += strspn(prefix, "/");
1333
1334 if (*prefix == 0)
1335 return true;
1336
1337 if (*path == 0)
1338 return false;
1339
1340 a = strcspn(path, "/");
1341 b = strcspn(prefix, "/");
1342
1343 if (a != b)
1344 return false;
1345
1346 if (memcmp(path, prefix, a) != 0)
1347 return false;
1348
1349 path += a;
1350 prefix += b;
1351 }
1352}
1353
15ae422b
LP		 1354bool path_equal(const char *a, const char *b) {
1355 assert(a);
1356 assert(b);
1357
1358 if ((a[0] == '/') != (b[0] == '/'))
1359 return false;
1360
1361 for (;;) {
1362 size_t j, k;
1363
1364 a += strspn(a, "/");
1365 b += strspn(b, "/");
1366
1367 if (*a == 0 && *b == 0)
1368 return true;
1369
1370 if (*a == 0 || *b == 0)
1371 return false;
1372
1373 j = strcspn(a, "/");
1374 k = strcspn(b, "/");
1375
1376 if (j != k)
1377 return false;
1378
1379 if (memcmp(a, b, j) != 0)
1380 return false;
1381
1382 a += j;
1383 b += k;
1384 }
1385}
1386
67d51650 1387char *ascii_strlower(char *t) {
4fe88d28
LP		 1388 char *p;
1389
67d51650 1390 assert(t);
4fe88d28 1391
67d51650 1392 for (p = t; *p; p++)
4fe88d28
LP		 1393 if (*p >= 'A' && *p <= 'Z')
1394 *p = *p - 'A' + 'a';
1395
67d51650 1396 return t;
4fe88d28 1397}
1dccbe19 1398
c85dc17b
LP		 1399bool ignore_file(const char *filename) {
1400 assert(filename);
1401
1402 return
1403 filename[0] == '.' ||
6c78be3c 1404 streq(filename, "lost+found") ||
c85dc17b
LP		 1405 endswith(filename, "~") ||
1406 endswith(filename, ".rpmnew") ||
1407 endswith(filename, ".rpmsave") ||
1408 endswith(filename, ".rpmorig") ||
1409 endswith(filename, ".dpkg-old") ||
1410 endswith(filename, ".dpkg-new") ||
1411 endswith(filename, ".swp");
1412}
1413
3a0ecb08
LP		 1414int fd_nonblock(int fd, bool nonblock) {
1415 int flags;
1416
1417 assert(fd >= 0);
1418
1419 if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
1420 return -errno;
1421
1422 if (nonblock)
1423 flags |= O_NONBLOCK;
1424 else
1425 flags &= ~O_NONBLOCK;
1426
1427 if (fcntl(fd, F_SETFL, flags) < 0)
1428 return -errno;
1429
1430 return 0;
1431}
1432
1433int fd_cloexec(int fd, bool cloexec) {
1434 int flags;
1435
1436 assert(fd >= 0);
1437
1438 if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
1439 return -errno;
1440
1441 if (cloexec)
1442 flags |= FD_CLOEXEC;
1443 else
1444 flags &= ~FD_CLOEXEC;
1445
1446 if (fcntl(fd, F_SETFD, flags) < 0)
1447 return -errno;
1448
1449 return 0;
1450}
1451
a0d40ac5
LP		 1452int close_all_fds(const int except[], unsigned n_except) {
1453 DIR *d;
1454 struct dirent *de;
1455 int r = 0;
1456
1457 if (!(d = opendir("/proc/self/fd")))
1458 return -errno;
1459
1460 while ((de = readdir(d))) {
a7610064 1461 int fd = -1;
a0d40ac5 1462
a16e1123 1463 if (ignore_file(de->d_name))
a0d40ac5
LP		 1464 continue;
1465
1466 if ((r = safe_atoi(de->d_name, &fd)) < 0)
1467 goto finish;
1468
1469 if (fd < 3)
1470 continue;
1471
1472 if (fd == dirfd(d))
1473 continue;
1474
1475 if (except) {
1476 bool found;
1477 unsigned i;
1478
1479 found = false;
1480 for (i = 0; i < n_except; i++)
1481 if (except[i] == fd) {
1482 found = true;
1483 break;
1484 }
1485
1486 if (found)
1487 continue;
1488 }
1489
2f357920
LP		 1490 if ((r = close_nointr(fd)) < 0) {
1491 /* Valgrind has its own FD and doesn't want to have it closed */
1492 if (errno != EBADF)
1493 goto finish;
1494 }
a0d40ac5
LP		 1495 }
1496
2f357920
LP		 1497 r = 0;
1498
a0d40ac5
LP		 1499finish:
1500 closedir(d);
1501 return r;
1502}
1503
db12775d
LP		 1504bool chars_intersect(const char *a, const char *b) {
1505 const char *p;
1506
1507 /* Returns true if any of the chars in a are in b. */
1508 for (p = a; *p; p++)
1509 if (strchr(b, *p))
1510 return true;
1511
1512 return false;
1513}
1514
8b6c7120
LP		 1515char *format_timestamp(char *buf, size_t l, usec_t t) {
1516 struct tm tm;
1517 time_t sec;
1518
1519 assert(buf);
1520 assert(l > 0);
1521
1522 if (t <= 0)
1523 return NULL;
1524
f872ec33 1525 sec = (time_t) (t / USEC_PER_SEC);
8b6c7120
LP		 1526
1527 if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
1528 return NULL;
1529
1530 return buf;
1531}
1532
871d7de4
LP		 1533char *format_timespan(char *buf, size_t l, usec_t t) {
1534 static const struct {
1535 const char *suffix;
1536 usec_t usec;
1537 } table[] = {
1538 { "w", USEC_PER_WEEK },
1539 { "d", USEC_PER_DAY },
1540 { "h", USEC_PER_HOUR },
1541 { "min", USEC_PER_MINUTE },
1542 { "s", USEC_PER_SEC },
1543 { "ms", USEC_PER_MSEC },
1544 { "us", 1 },
1545 };
1546
1547 unsigned i;
1548 char *p = buf;
1549
1550 assert(buf);
1551 assert(l > 0);
1552
1553 if (t == (usec_t) -1)
1554 return NULL;
1555
1556 /* The result of this function can be parsed with parse_usec */
1557
1558 for (i = 0; i < ELEMENTSOF(table); i++) {
1559 int k;
1560 size_t n;
1561
1562 if (t < table[i].usec)
1563 continue;
1564
1565 if (l <= 1)
1566 break;
1567
1568 k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix);
1569 n = MIN((size_t) k, l);
1570
1571 l -= n;
1572 p += n;
1573
1574 t %= table[i].usec;
1575 }
1576
1577 *p = 0;
1578
1579 return buf;
1580}
1581
42856c10
LP		 1582bool fstype_is_network(const char *fstype) {
1583 static const char * const table[] = {
1584 "cifs",
1585 "smbfs",
1586 "ncpfs",
1587 "nfs",
ca139f94
LP		 1588 "nfs4",
1589 "gfs",
1590 "gfs2"
42856c10
LP		 1591 };
1592
1593 unsigned i;
1594
1595 for (i = 0; i < ELEMENTSOF(table); i++)
1596 if (streq(table[i], fstype))
1597 return true;
1598
1599 return false;
1600}
1601
601f6a1e
LP		 1602int chvt(int vt) {
1603 int fd, r = 0;
1604
1605 if ((fd = open("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
1606 return -errno;
1607
1608 if (vt < 0) {
1609 int tiocl[2] = {
1610 TIOCL_GETKMSGREDIRECT,
1611 0
1612 };
1613
1614 if (ioctl(fd, TIOCLINUX, tiocl) < 0)
1615 return -errno;
1616
1617 vt = tiocl[0] <= 0 ? 1 : tiocl[0];
1618 }
1619
1620 if (ioctl(fd, VT_ACTIVATE, vt) < 0)
1621 r = -errno;
1622
a16e1123 1623 close_nointr_nofail(r);
601f6a1e
LP		 1624 return r;
1625}
1626
80876c20
LP		 1627int read_one_char(FILE *f, char *ret, bool *need_nl) {
1628 struct termios old_termios, new_termios;
1629 char c;
1630 char line[1024];
1631
1632 assert(f);
1633 assert(ret);
1634
1635 if (tcgetattr(fileno(f), &old_termios) >= 0) {
1636 new_termios = old_termios;
1637
1638 new_termios.c_lflag &= ~ICANON;
1639 new_termios.c_cc[VMIN] = 1;
1640 new_termios.c_cc[VTIME] = 0;
1641
1642 if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
1643 size_t k;
1644
1645 k = fread(&c, 1, 1, f);
1646
1647 tcsetattr(fileno(f), TCSADRAIN, &old_termios);
1648
1649 if (k <= 0)
1650 return -EIO;
1651
1652 if (need_nl)
1653 *need_nl = c != '\n';
1654
1655 *ret = c;
1656 return 0;
1657 }
1658 }
1659
1660 if (!(fgets(line, sizeof(line), f)))
1661 return -EIO;
1662
1663 truncate_nl(line);
1664
1665 if (strlen(line) != 1)
1666 return -EBADMSG;
1667
1668 if (need_nl)
1669 *need_nl = false;
1670
1671 *ret = line[0];
1672 return 0;
1673}
1674
1675int ask(char *ret, const char *replies, const char *text, ...) {
1676 assert(ret);
1677 assert(replies);
1678 assert(text);
1679
1680 for (;;) {
1681 va_list ap;
1682 char c;
1683 int r;
1684 bool need_nl = true;
1685
b1b2dc0c
LP		 1686 fputs("\x1B[1m", stdout);
1687
80876c20
LP		 1688 va_start(ap, text);
1689 vprintf(text, ap);
1690 va_end(ap);
1691
b1b2dc0c
LP		 1692 fputs("\x1B[0m", stdout);
1693
80876c20
LP		 1694 fflush(stdout);
1695
1696 if ((r = read_one_char(stdin, &c, &need_nl)) < 0) {
1697
1698 if (r == -EBADMSG) {
1699 puts("Bad input, please try again.");
1700 continue;
1701 }
1702
1703 putchar('\n');
1704 return r;
1705 }
1706
1707 if (need_nl)
1708 putchar('\n');
1709
1710 if (strchr(replies, c)) {
1711 *ret = c;
1712 return 0;
1713 }
1714
1715 puts("Read unexpected character, please try again.");
1716 }
1717}
1718
1719int reset_terminal(int fd) {
1720 struct termios termios;
1721 int r = 0;
1722
1723 assert(fd >= 0);
1724
aaf694ca 1725 /* Set terminal to some sane defaults */
80876c20
LP		 1726
1727 if (tcgetattr(fd, &termios) < 0) {
1728 r = -errno;
1729 goto finish;
1730 }
1731
aaf694ca
LP		 1732 /* We only reset the stuff that matters to the software. How
1733 * hardware is set up we don't touch assuming that somebody
1734 * else will do that for us */
1735
1736 termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
80876c20
LP		 1737 termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
1738 termios.c_oflag |= ONLCR;
1739 termios.c_cflag |= CREAD;
1740 termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
1741
1742 termios.c_cc[VINTR] = 03; /* ^C */
1743 termios.c_cc[VQUIT] = 034; /* ^\ */
1744 termios.c_cc[VERASE] = 0177;
1745 termios.c_cc[VKILL] = 025; /* ^X */
1746 termios.c_cc[VEOF] = 04; /* ^D */
1747 termios.c_cc[VSTART] = 021; /* ^Q */
1748 termios.c_cc[VSTOP] = 023; /* ^S */
1749 termios.c_cc[VSUSP] = 032; /* ^Z */
1750 termios.c_cc[VLNEXT] = 026; /* ^V */
1751 termios.c_cc[VWERASE] = 027; /* ^W */
1752 termios.c_cc[VREPRINT] = 022; /* ^R */
aaf694ca
LP		 1753 termios.c_cc[VEOL] = 0;
1754 termios.c_cc[VEOL2] = 0;
80876c20
LP		 1755
1756 termios.c_cc[VTIME] = 0;
1757 termios.c_cc[VMIN] = 1;
1758
1759 if (tcsetattr(fd, TCSANOW, &termios) < 0)
1760 r = -errno;
1761
1762finish:
1763 /* Just in case, flush all crap out */
1764 tcflush(fd, TCIOFLUSH);
1765
1766 return r;
1767}
1768
1769int open_terminal(const char *name, int mode) {
1770 int fd, r;
1771
1772 if ((fd = open(name, mode)) < 0)
1773 return -errno;
1774
1775 if ((r = isatty(fd)) < 0) {
1776 close_nointr_nofail(fd);
1777 return -errno;
1778 }
1779
1780 if (!r) {
1781 close_nointr_nofail(fd);
1782 return -ENOTTY;
1783 }
1784
1785 return fd;
1786}
1787
1788int flush_fd(int fd) {
1789 struct pollfd pollfd;
1790
1791 zero(pollfd);
1792 pollfd.fd = fd;
1793 pollfd.events = POLLIN;
1794
1795 for (;;) {
1796 char buf[1024];
1797 ssize_t l;
1798 int r;
1799
1800 if ((r = poll(&pollfd, 1, 0)) < 0) {
1801
1802 if (errno == EINTR)
1803 continue;
1804
1805 return -errno;
1806 }
1807
1808 if (r == 0)
1809 return 0;
1810
1811 if ((l = read(fd, buf, sizeof(buf))) < 0) {
1812
1813 if (errno == EINTR)
1814 continue;
1815
1816 if (errno == EAGAIN)
1817 return 0;
1818
1819 return -errno;
1820 }
1821
1822 if (l <= 0)
1823 return 0;
1824 }
1825}
1826
21de3988 1827int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm) {
bab45044 1828 int fd = -1, notify = -1, r, wd = -1;
80876c20
LP		 1829
1830 assert(name);
1831
1832 /* We use inotify to be notified when the tty is closed. We
1833 * create the watch before checking if we can actually acquire
1834 * it, so that we don't lose any event.
1835 *
1836 * Note: strictly speaking this actually watches for the
1837 * device being closed, it does *not* really watch whether a
1838 * tty loses its controlling process. However, unless some
1839 * rogue process uses TIOCNOTTY on /dev/tty *after* closing
1840 * its tty otherwise this will not become a problem. As long
1841 * as the administrator makes sure not configure any service
1842 * on the same tty as an untrusted user this should not be a
1843 * problem. (Which he probably should not do anyway.) */
1844
1845 if (!fail && !force) {
1846 if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
1847 r = -errno;
1848 goto fail;
1849 }
1850
1851 if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) {
1852 r = -errno;
1853 goto fail;
1854 }
1855 }
1856
1857 for (;;) {
e3d1855b
LP		 1858 if (notify >= 0)
1859 if ((r = flush_fd(notify)) < 0)
1860 goto fail;
80876c20
LP		 1861
1862 /* We pass here O_NOCTTY only so that we can check the return
1863 * value TIOCSCTTY and have a reliable way to figure out if we
1864 * successfully became the controlling process of the tty */
1865 if ((fd = open_terminal(name, O_RDWR|O_NOCTTY)) < 0)
1866 return -errno;
1867
1868 /* First, try to get the tty */
21de3988
LP		 1869 r = ioctl(fd, TIOCSCTTY, force);
1870
1871 /* Sometimes it makes sense to ignore TIOCSCTTY
1872 * returning EPERM, i.e. when very likely we already
1873 * are have this controlling terminal. */
1874 if (r < 0 && errno == EPERM && ignore_tiocstty_eperm)
1875 r = 0;
1876
1877 if (r < 0 && (force || fail || errno != EPERM)) {
80876c20
LP		 1878 r = -errno;
1879 goto fail;
1880 }
1881
1882 if (r >= 0)
1883 break;
1884
1885 assert(!fail);
1886 assert(!force);
1887 assert(notify >= 0);
1888
1889 for (;;) {
1890 struct inotify_event e;
1891 ssize_t l;
1892
1893 if ((l = read(notify, &e, sizeof(e))) != sizeof(e)) {
1894
1895 if (l < 0) {
1896
1897 if (errno == EINTR)
1898 continue;
1899
1900 r = -errno;
1901 } else
1902 r = -EIO;
1903
1904 goto fail;
1905 }
1906
1907 if (e.wd != wd || !(e.mask & IN_CLOSE)) {
1908 r = -errno;
1909 goto fail;
1910 }
1911
1912 break;
1913 }
1914
1915 /* We close the tty fd here since if the old session
1916 * ended our handle will be dead. It's important that
1917 * we do this after sleeping, so that we don't enter
1918 * an endless loop. */
1919 close_nointr_nofail(fd);
1920 }
1921
1922 if (notify >= 0)
a16e1123 1923 close_nointr_nofail(notify);
80876c20
LP		 1924
1925 if ((r = reset_terminal(fd)) < 0)
1926 log_warning("Failed to reset terminal: %s", strerror(-r));
1927
1928 return fd;
1929
1930fail:
1931 if (fd >= 0)
a16e1123 1932 close_nointr_nofail(fd);
80876c20
LP		 1933
1934 if (notify >= 0)
a16e1123 1935 close_nointr_nofail(notify);
80876c20
LP		 1936
1937 return r;
1938}
1939
1940int release_terminal(void) {
1941 int r = 0, fd;
57cd2192 1942 struct sigaction sa_old, sa_new;
80876c20 1943
57cd2192 1944 if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY)) < 0)
80876c20
LP		 1945 return -errno;
1946
57cd2192
LP		 1947 /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
1948 * by our own TIOCNOTTY */
1949
1950 zero(sa_new);
1951 sa_new.sa_handler = SIG_IGN;
1952 sa_new.sa_flags = SA_RESTART;
1953 assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
1954
80876c20
LP		 1955 if (ioctl(fd, TIOCNOTTY) < 0)
1956 r = -errno;
1957
57cd2192
LP		 1958 assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
1959
80876c20
LP		 1960 close_nointr_nofail(fd);
1961 return r;
1962}
1963
9a34ec5f
LP		 1964int sigaction_many(const struct sigaction *sa, ...) {
1965 va_list ap;
1966 int r = 0, sig;
1967
1968 va_start(ap, sa);
1969 while ((sig = va_arg(ap, int)) > 0)
1970 if (sigaction(sig, sa, NULL) < 0)
1971 r = -errno;
1972 va_end(ap);
1973
1974 return r;
1975}
1976
1977int ignore_signals(int sig, ...) {
a337c6fc 1978 struct sigaction sa;
9a34ec5f
LP		 1979 va_list ap;
1980 int r = 0;
a337c6fc
LP		 1981
1982 zero(sa);
1983 sa.sa_handler = SIG_IGN;
1984 sa.sa_flags = SA_RESTART;
1985
9a34ec5f
LP		 1986 if (sigaction(sig, &sa, NULL) < 0)
1987 r = -errno;
1988
1989 va_start(ap, sig);
1990 while ((sig = va_arg(ap, int)) > 0)
1991 if (sigaction(sig, &sa, NULL) < 0)
1992 r = -errno;
1993 va_end(ap);
1994
1995 return r;
1996}
1997
1998int default_signals(int sig, ...) {
1999 struct sigaction sa;
2000 va_list ap;
2001 int r = 0;
2002
2003 zero(sa);
2004 sa.sa_handler = SIG_DFL;
2005 sa.sa_flags = SA_RESTART;
2006
2007 if (sigaction(sig, &sa, NULL) < 0)
2008 r = -errno;
2009
2010 va_start(ap, sig);
2011 while ((sig = va_arg(ap, int)) > 0)
2012 if (sigaction(sig, &sa, NULL) < 0)
2013 r = -errno;
2014 va_end(ap);
2015
2016 return r;
a337c6fc
LP		 2017}
2018
8d567588
LP		 2019int close_pipe(int p[]) {
2020 int a = 0, b = 0;
2021
2022 assert(p);
2023
2024 if (p[0] >= 0) {
2025 a = close_nointr(p[0]);
2026 p[0] = -1;
2027 }
2028
2029 if (p[1] >= 0) {
2030 b = close_nointr(p[1]);
2031 p[1] = -1;
2032 }
2033
2034 return a < 0 ? a : b;
2035}
2036
eb22ac37 2037ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
8d567588
LP		 2038 uint8_t *p;
2039 ssize_t n = 0;
2040
2041 assert(fd >= 0);
2042 assert(buf);
2043
2044 p = buf;
2045
2046 while (nbytes > 0) {
2047 ssize_t k;
2048
2049 if ((k = read(fd, p, nbytes)) <= 0) {
2050
eb22ac37 2051 if (k < 0 && errno == EINTR)
8d567588
LP		 2052 continue;
2053
eb22ac37 2054 if (k < 0 && errno == EAGAIN && do_poll) {
8d567588
LP		 2055 struct pollfd pollfd;
2056
2057 zero(pollfd);
2058 pollfd.fd = fd;
2059 pollfd.events = POLLIN;
2060
2061 if (poll(&pollfd, 1, -1) < 0) {
2062 if (errno == EINTR)
2063 continue;
2064
2065 return n > 0 ? n : -errno;
2066 }
2067
2068 if (pollfd.revents != POLLIN)
2069 return n > 0 ? n : -EIO;
2070
2071 continue;
2072 }
2073
2074 return n > 0 ? n : (k < 0 ? -errno : 0);
2075 }
2076
2077 p += k;
2078 nbytes -= k;
2079 n += k;
2080 }
2081
2082 return n;
2083}
2084
eb22ac37
LP		 2085ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
2086 const uint8_t *p;
2087 ssize_t n = 0;
2088
2089 assert(fd >= 0);
2090 assert(buf);
2091
2092 p = buf;
2093
2094 while (nbytes > 0) {
2095 ssize_t k;
2096
2097 if ((k = write(fd, p, nbytes)) <= 0) {
2098
2099 if (k < 0 && errno == EINTR)
2100 continue;
2101
2102 if (k < 0 && errno == EAGAIN && do_poll) {
2103 struct pollfd pollfd;
2104
2105 zero(pollfd);
2106 pollfd.fd = fd;
2107 pollfd.events = POLLOUT;
2108
2109 if (poll(&pollfd, 1, -1) < 0) {
2110 if (errno == EINTR)
2111 continue;
2112
2113 return n > 0 ? n : -errno;
2114 }
2115
2116 if (pollfd.revents != POLLOUT)
2117 return n > 0 ? n : -EIO;
2118
2119 continue;
2120 }
2121
2122 return n > 0 ? n : (k < 0 ? -errno : 0);
2123 }
2124
2125 p += k;
2126 nbytes -= k;
2127 n += k;
2128 }
2129
2130 return n;
2131}
2132
8d567588
LP		 2133int path_is_mount_point(const char *t) {
2134 struct stat a, b;
2135 char *copy;
2136
2137 if (lstat(t, &a) < 0) {
2138
2139 if (errno == ENOENT)
2140 return 0;
2141
2142 return -errno;
2143 }
2144
2145 if (!(copy = strdup(t)))
2146 return -ENOMEM;
2147
2148 if (lstat(dirname(copy), &b) < 0) {
2149 free(copy);
2150 return -errno;
2151 }
2152
2153 free(copy);
2154
2155 return a.st_dev != b.st_dev;
2156}
2157
24a6e4a4
LP		 2158int parse_usec(const char *t, usec_t *usec) {
2159 static const struct {
2160 const char *suffix;
2161 usec_t usec;
2162 } table[] = {
2163 { "sec", USEC_PER_SEC },
2164 { "s", USEC_PER_SEC },
2165 { "min", USEC_PER_MINUTE },
2166 { "hr", USEC_PER_HOUR },
2167 { "h", USEC_PER_HOUR },
2168 { "d", USEC_PER_DAY },
2169 { "w", USEC_PER_WEEK },
2170 { "msec", USEC_PER_MSEC },
2171 { "ms", USEC_PER_MSEC },
2172 { "m", USEC_PER_MINUTE },
2173 { "usec", 1ULL },
2174 { "us", 1ULL },
2175 { "", USEC_PER_SEC },
2176 };
2177
2178 const char *p;
2179 usec_t r = 0;
2180
2181 assert(t);
2182 assert(usec);
2183
2184 p = t;
2185 do {
2186 long long l;
2187 char *e;
2188 unsigned i;
2189
2190 errno = 0;
2191 l = strtoll(p, &e, 10);
2192
2193 if (errno != 0)
2194 return -errno;
2195
2196 if (l < 0)
2197 return -ERANGE;
2198
2199 if (e == p)
2200 return -EINVAL;
2201
2202 e += strspn(e, WHITESPACE);
2203
2204 for (i = 0; i < ELEMENTSOF(table); i++)
2205 if (startswith(e, table[i].suffix)) {
2206 r += (usec_t) l * table[i].usec;
2207 p = e + strlen(table[i].suffix);
2208 break;
2209 }
2210
2211 if (i >= ELEMENTSOF(table))
2212 return -EINVAL;
2213
2214 } while (*p != 0);
2215
2216 *usec = r;
2217
2218 return 0;
2219}
2220
843d2643
LP		 2221int make_stdio(int fd) {
2222 int r, s, t;
2223
2224 assert(fd >= 0);
2225
2226 r = dup2(fd, STDIN_FILENO);
2227 s = dup2(fd, STDOUT_FILENO);
2228 t = dup2(fd, STDERR_FILENO);
2229
2230 if (fd >= 3)
2231 close_nointr_nofail(fd);
2232
2233 if (r < 0 || s < 0 || t < 0)
2234 return -errno;
2235
2236 return 0;
2237}
2238
cb8a8f78
LP		 2239bool is_clean_exit(int code, int status) {
2240
2241 if (code == CLD_EXITED)
2242 return status == 0;
2243
2244 /* If a daemon does not implement handlers for some of the
2245 * signals that's not considered an unclean shutdown */
2246 if (code == CLD_KILLED)
2247 return
2248 status == SIGHUP ||
2249 status == SIGINT ||
2250 status == SIGTERM ||
2251 status == SIGPIPE;
2252
2253 return false;
2254}
2255
8407a5d0
LP		 2256bool is_device_path(const char *path) {
2257
2258 /* Returns true on paths that refer to a device, either in
2259 * sysfs or in /dev */
2260
2261 return
2262 path_startswith(path, "/dev/") ||
2263 path_startswith(path, "/sys/");
2264}
2265
01f78473
LP		 2266int dir_is_empty(const char *path) {
2267 DIR *d;
2268 int r;
2269 struct dirent buf, *de;
2270
2271 if (!(d = opendir(path)))
2272 return -errno;
2273
2274 for (;;) {
2275 if ((r = readdir_r(d, &buf, &de)) > 0) {
2276 r = -r;
2277 break;
2278 }
2279
2280 if (!de) {
2281 r = 1;
2282 break;
2283 }
2284
2285 if (!ignore_file(de->d_name)) {
2286 r = 0;
2287 break;
2288 }
2289 }
2290
2291 closedir(d);
2292 return r;
2293}
2294
d3782d60
LP		 2295unsigned long long random_ull(void) {
2296 int fd;
2297 uint64_t ull;
2298 ssize_t r;
2299
2300 if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0)
2301 goto fallback;
2302
eb22ac37 2303 r = loop_read(fd, &ull, sizeof(ull), true);
d3782d60
LP		 2304 close_nointr_nofail(fd);
2305
2306 if (r != sizeof(ull))
2307 goto fallback;
2308
2309 return ull;
2310
2311fallback:
2312 return random() * RAND_MAX + random();
2313}
2314
5b6319dc
LP		 2315void rename_process(const char name[8]) {
2316 assert(name);
2317
2318 prctl(PR_SET_NAME, name);
2319
2320 /* This is a like a poor man's setproctitle(). The string
2321 * passed should fit in 7 chars (i.e. the length of
2322 * "systemd") */
2323
2324 if (program_invocation_name)
2325 strncpy(program_invocation_name, name, strlen(program_invocation_name));
2326}
2327
7d793605
LP		 2328void sigset_add_many(sigset_t *ss, ...) {
2329 va_list ap;
2330 int sig;
2331
2332 assert(ss);
2333
2334 va_start(ap, ss);
2335 while ((sig = va_arg(ap, int)) > 0)
2336 assert_se(sigaddset(ss, sig) == 0);
2337 va_end(ap);
2338}
2339
ef2f1067
LP		 2340char* gethostname_malloc(void) {
2341 struct utsname u;
2342
2343 assert_se(uname(&u) >= 0);
2344
2345 if (u.nodename[0])
2346 return strdup(u.nodename);
2347
2348 return strdup(u.sysname);
2349}
2350
8c6db833
LP		 2351int getmachineid_malloc(char **b) {
2352 int r;
2353
2354 assert(b);
2355
2356 if ((r = read_one_line_file("/var/lib/dbus/machine-id", b)) < 0)
2357 return r;
2358
2359 strstrip(*b);
2360 return 0;
2361}
2362
ef2f1067
LP		 2363char* getlogname_malloc(void) {
2364 uid_t uid;
2365 long bufsize;
2366 char *buf, *name;
2367 struct passwd pwbuf, *pw = NULL;
2368 struct stat st;
2369
2370 if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
2371 uid = st.st_uid;
2372 else
2373 uid = getuid();
2374
2375 /* Shortcut things to avoid NSS lookups */
2376 if (uid == 0)
2377 return strdup("root");
2378
2379 if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0)
2380 bufsize = 4096;
2381
2382 if (!(buf = malloc(bufsize)))
2383 return NULL;
2384
2385 if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) {
2386 name = strdup(pw->pw_name);
2387 free(buf);
2388 return name;
2389 }
2390
2391 free(buf);
2392
2393 if (asprintf(&name, "%lu", (unsigned long) uid) < 0)
2394 return NULL;
2395
2396 return name;
2397}
2398
8c6db833
LP		 2399int getttyname_malloc(char **r) {
2400 char path[PATH_MAX], *p, *c;
2401
2402 assert(r);
ef2f1067
LP		 2403
2404 if (ttyname_r(STDIN_FILENO, path, sizeof(path)) < 0)
8c6db833 2405 return -errno;
ef2f1067
LP		 2406
2407 char_array_0(path);
2408
2409 p = path;
2410 if (startswith(path, "/dev/"))
2411 p += 5;
2412
8c6db833
LP		 2413 if (!(c = strdup(p)))
2414 return -ENOMEM;
2415
2416 *r = c;
2417 return 0;
2418}
2419
2420static int rm_rf_children(int fd, bool only_dirs) {
2421 DIR *d;
2422 int ret = 0;
2423
2424 assert(fd >= 0);
2425
2426 /* This returns the first error we run into, but nevertheless
2427 * tries to go on */
2428
2429 if (!(d = fdopendir(fd))) {
2430 close_nointr_nofail(fd);
2431 return -errno;
2432 }
2433
2434 for (;;) {
2435 struct dirent buf, *de;
2436 bool is_dir;
2437 int r;
2438
2439 if ((r = readdir_r(d, &buf, &de)) != 0) {
2440 if (ret == 0)
2441 ret = -r;
2442 break;
2443 }
2444
2445 if (!de)
2446 break;
2447
2448 if (streq(de->d_name, ".") || streq(de->d_name, ".."))
2449 continue;
2450
2451 if (de->d_type == DT_UNKNOWN) {
2452 struct stat st;
2453
2454 if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
2455 if (ret == 0)
2456 ret = -errno;
2457 continue;
2458 }
2459
2460 is_dir = S_ISDIR(st.st_mode);
2461 } else
2462 is_dir = de->d_type == DT_DIR;
2463
2464 if (is_dir) {
2465 int subdir_fd;
2466
2467 if ((subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
2468 if (ret == 0)
2469 ret = -errno;
2470 continue;
2471 }
2472
2473 if ((r = rm_rf_children(subdir_fd, only_dirs)) < 0) {
2474 if (ret == 0)
2475 ret = r;
2476 }
2477
2478 if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
2479 if (ret == 0)
2480 ret = -errno;
2481 }
2482 } else if (!only_dirs) {
2483
2484 if (unlinkat(fd, de->d_name, 0) < 0) {
2485 if (ret == 0)
2486 ret = -errno;
2487 }
2488 }
2489 }
2490
2491 closedir(d);
2492
2493 return ret;
2494}
2495
2496int rm_rf(const char *path, bool only_dirs, bool delete_root) {
2497 int fd;
2498 int r;
2499
2500 assert(path);
2501
2502 if ((fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
2503
2504 if (errno != ENOTDIR)
2505 return -errno;
2506
2507 if (delete_root && !only_dirs)
2508 if (unlink(path) < 0)
2509 return -errno;
2510
2511 return 0;
2512 }
2513
2514 r = rm_rf_children(fd, only_dirs);
2515
2516 if (delete_root)
2517 if (rmdir(path) < 0) {
2518 if (r == 0)
2519 r = -errno;
2520 }
2521
2522 return r;
2523}
2524
2525int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
2526 assert(path);
2527
2528 /* Under the assumption that we are running privileged we
2529 * first change the access mode and only then hand out
2530 * ownership to avoid a window where access is too open. */
2531
2532 if (chmod(path, mode) < 0)
2533 return -errno;
2534
2535 if (chown(path, uid, gid) < 0)
2536 return -errno;
2537
2538 return 0;
ef2f1067
LP		 2539}
2540
82c121a4
LP		 2541cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
2542 cpu_set_t *r;
2543 unsigned n = 1024;
2544
2545 /* Allocates the cpuset in the right size */
2546
2547 for (;;) {
2548 if (!(r = CPU_ALLOC(n)))
2549 return NULL;
2550
2551 if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) {
2552 CPU_ZERO_S(CPU_ALLOC_SIZE(n), r);
2553
2554 if (ncpus)
2555 *ncpus = n;
2556
2557 return r;
2558 }
2559
2560 CPU_FREE(r);
2561
2562 if (errno != EINVAL)
2563 return NULL;
2564
2565 n *= 2;
2566 }
2567}
2568
1dccbe19
LP		 2569static const char *const ioprio_class_table[] = {
2570 [IOPRIO_CLASS_NONE] = "none",
2571 [IOPRIO_CLASS_RT] = "realtime",
2572 [IOPRIO_CLASS_BE] = "best-effort",
2573 [IOPRIO_CLASS_IDLE] = "idle"
2574};
2575
2576DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int);
2577
2578static const char *const sigchld_code_table[] = {
2579 [CLD_EXITED] = "exited",
2580 [CLD_KILLED] = "killed",
2581 [CLD_DUMPED] = "dumped",
2582 [CLD_TRAPPED] = "trapped",
2583 [CLD_STOPPED] = "stopped",
2584 [CLD_CONTINUED] = "continued",
2585};
2586
2587DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
2588
2589static const char *const log_facility_table[LOG_NFACILITIES] = {
2590 [LOG_FAC(LOG_KERN)] = "kern",
2591 [LOG_FAC(LOG_USER)] = "user",
2592 [LOG_FAC(LOG_MAIL)] = "mail",
2593 [LOG_FAC(LOG_DAEMON)] = "daemon",
2594 [LOG_FAC(LOG_AUTH)] = "auth",
2595 [LOG_FAC(LOG_SYSLOG)] = "syslog",
2596 [LOG_FAC(LOG_LPR)] = "lpr",
2597 [LOG_FAC(LOG_NEWS)] = "news",
2598 [LOG_FAC(LOG_UUCP)] = "uucp",
2599 [LOG_FAC(LOG_CRON)] = "cron",
2600 [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
2601 [LOG_FAC(LOG_FTP)] = "ftp",
2602 [LOG_FAC(LOG_LOCAL0)] = "local0",
2603 [LOG_FAC(LOG_LOCAL1)] = "local1",
2604 [LOG_FAC(LOG_LOCAL2)] = "local2",
2605 [LOG_FAC(LOG_LOCAL3)] = "local3",
2606 [LOG_FAC(LOG_LOCAL4)] = "local4",
2607 [LOG_FAC(LOG_LOCAL5)] = "local5",
2608 [LOG_FAC(LOG_LOCAL6)] = "local6",
2609 [LOG_FAC(LOG_LOCAL7)] = "local7"
2610};
2611
2612DEFINE_STRING_TABLE_LOOKUP(log_facility, int);
2613
2614static const char *const log_level_table[] = {
2615 [LOG_EMERG] = "emerg",
2616 [LOG_ALERT] = "alert",
2617 [LOG_CRIT] = "crit",
2618 [LOG_ERR] = "err",
2619 [LOG_WARNING] = "warning",
2620 [LOG_NOTICE] = "notice",
2621 [LOG_INFO] = "info",
2622 [LOG_DEBUG] = "debug"
2623};
2624
2625DEFINE_STRING_TABLE_LOOKUP(log_level, int);
2626
2627static const char* const sched_policy_table[] = {
2628 [SCHED_OTHER] = "other",
2629 [SCHED_BATCH] = "batch",
2630 [SCHED_IDLE] = "idle",
2631 [SCHED_FIFO] = "fifo",
2632 [SCHED_RR] = "rr"
2633};
2634
2635DEFINE_STRING_TABLE_LOOKUP(sched_policy, int);
2636
2637static const char* const rlimit_table[] = {
2638 [RLIMIT_CPU] = "LimitCPU",
2639 [RLIMIT_FSIZE] = "LimitFSIZE",
2640 [RLIMIT_DATA] = "LimitDATA",
2641 [RLIMIT_STACK] = "LimitSTACK",
2642 [RLIMIT_CORE] = "LimitCORE",
2643 [RLIMIT_RSS] = "LimitRSS",
2644 [RLIMIT_NOFILE] = "LimitNOFILE",
2645 [RLIMIT_AS] = "LimitAS",
2646 [RLIMIT_NPROC] = "LimitNPROC",
2647 [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
2648 [RLIMIT_LOCKS] = "LimitLOCKS",
2649 [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
2650 [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
2651 [RLIMIT_NICE] = "LimitNICE",
2652 [RLIMIT_RTPRIO] = "LimitRTPRIO",
2653 [RLIMIT_RTTIME] = "LimitRTTIME"
2654};
2655
2656DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
4fd5948e
LP		 2657
2658static const char* const ip_tos_table[] = {
2659 [IPTOS_LOWDELAY] = "low-delay",
2660 [IPTOS_THROUGHPUT] = "throughput",
2661 [IPTOS_RELIABILITY] = "reliability",
2662 [IPTOS_LOWCOST] = "low-cost",
2663};
2664
2665DEFINE_STRING_TABLE_LOOKUP(ip_tos, int);
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