]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/util.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
service: check whether sysv scripts where changed
[thirdparty/systemd.git] / src / util.c
CommitLineData
d6c9574f 1/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
60918275 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>
3fe5e5d4 50#include <linux/kd.h>
afea26ad 51#include <dlfcn.h>
2e78aa99 52#include <sys/wait.h>
ac123445 53#include <sys/capability.h>
7948c4df
KS		 54#include <sys/time.h>
55#include <linux/rtc.h>
60918275
LP		 56
57#include "macro.h"
58#include "util.h"
1dccbe19
LP		 59#include "ioprio.h"
60#include "missing.h"
a9f5d454 61#include "log.h"
65d2ebdc 62#include "strv.h"
e51bc1a2 63#include "label.h"
d06dacd0 64#include "exit-status.h"
83cc030f 65#include "hashmap.h"
56cf987f 66
37f85e66 67size_t page_size(void) {
68 static __thread size_t pgsz = 0;
69 long r;
70
71 if (pgsz)
72 return pgsz;
73
74 assert_se((r = sysconf(_SC_PAGESIZE)) > 0);
75
76 pgsz = (size_t) r;
77
78 return pgsz;
79}
80
e05797fb
LP		 81bool streq_ptr(const char *a, const char *b) {
82
83 /* Like streq(), but tries to make sense of NULL pointers */
84
85 if (a && b)
86 return streq(a, b);
87
88 if (!a && !b)
89 return true;
90
91 return false;
92}
93
47be870b 94usec_t now(clockid_t clock_id) {
60918275
LP		 95 struct timespec ts;
96
47be870b 97 assert_se(clock_gettime(clock_id, &ts) == 0);
60918275
LP		 98
99 return timespec_load(&ts);
100}
101
63983207 102dual_timestamp* dual_timestamp_get(dual_timestamp *ts) {
871d7de4
LP		 103 assert(ts);
104
105 ts->realtime = now(CLOCK_REALTIME);
106 ts->monotonic = now(CLOCK_MONOTONIC);
107
108 return ts;
109}
110
60918275
LP		 111usec_t timespec_load(const struct timespec *ts) {
112 assert(ts);
113
114 return
115 (usec_t) ts->tv_sec * USEC_PER_SEC +
116 (usec_t) ts->tv_nsec / NSEC_PER_USEC;
117}
118
119struct timespec *timespec_store(struct timespec *ts, usec_t u) {
120 assert(ts);
121
122 ts->tv_sec = (time_t) (u / USEC_PER_SEC);
123 ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
124
125 return ts;
126}
127
128usec_t timeval_load(const struct timeval *tv) {
129 assert(tv);
130
131 return
132 (usec_t) tv->tv_sec * USEC_PER_SEC +
133 (usec_t) tv->tv_usec;
134}
135
136struct timeval *timeval_store(struct timeval *tv, usec_t u) {
137 assert(tv);
138
139 tv->tv_sec = (time_t) (u / USEC_PER_SEC);
140 tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
141
142 return tv;
143}
144
145bool endswith(const char *s, const char *postfix) {
146 size_t sl, pl;
147
148 assert(s);
149 assert(postfix);
150
151 sl = strlen(s);
152 pl = strlen(postfix);
153
d4d0d4db
LP		 154 if (pl == 0)
155 return true;
156
60918275
LP		 157 if (sl < pl)
158 return false;
159
160 return memcmp(s + sl - pl, postfix, pl) == 0;
161}
162
163bool startswith(const char *s, const char *prefix) {
164 size_t sl, pl;
165
166 assert(s);
167 assert(prefix);
168
169 sl = strlen(s);
170 pl = strlen(prefix);
171
d4d0d4db
LP		 172 if (pl == 0)
173 return true;
174
60918275
LP		 175 if (sl < pl)
176 return false;
177
178 return memcmp(s, prefix, pl) == 0;
179}
180
3177a7fa
MAP		 181bool startswith_no_case(const char *s, const char *prefix) {
182 size_t sl, pl;
183 unsigned i;
184
185 assert(s);
186 assert(prefix);
187
188 sl = strlen(s);
189 pl = strlen(prefix);
190
191 if (pl == 0)
192 return true;
193
194 if (sl < pl)
195 return false;
196
197 for(i = 0; i < pl; ++i) {
198 if (tolower(s[i]) != tolower(prefix[i]))
199 return false;
200 }
201
202 return true;
203}
204
79d6d816
LP		 205bool first_word(const char *s, const char *word) {
206 size_t sl, wl;
207
208 assert(s);
209 assert(word);
210
211 sl = strlen(s);
212 wl = strlen(word);
213
214 if (sl < wl)
215 return false;
216
d4d0d4db
LP		 217 if (wl == 0)
218 return true;
219
79d6d816
LP		 220 if (memcmp(s, word, wl) != 0)
221 return false;
222
d4d0d4db
LP		 223 return s[wl] == 0 ||
224 strchr(WHITESPACE, s[wl]);
79d6d816
LP		 225}
226
42f4e3c4 227int close_nointr(int fd) {
60918275
LP		 228 assert(fd >= 0);
229
230 for (;;) {
231 int r;
232
48f82119
LP		 233 r = close(fd);
234 if (r >= 0)
60918275
LP		 235 return r;
236
237 if (errno != EINTR)
48f82119 238 return -errno;
60918275
LP		 239 }
240}
85261803 241
85f136b5 242void close_nointr_nofail(int fd) {
80876c20 243 int saved_errno = errno;
85f136b5
LP		 244
245 /* like close_nointr() but cannot fail, and guarantees errno
246 * is unchanged */
247
248 assert_se(close_nointr(fd) == 0);
80876c20
LP		 249
250 errno = saved_errno;
85f136b5
LP		 251}
252
5b6319dc
LP		 253void close_many(const int fds[], unsigned n_fd) {
254 unsigned i;
255
256 for (i = 0; i < n_fd; i++)
257 close_nointr_nofail(fds[i]);
258}
259
85261803
LP		 260int parse_boolean(const char *v) {
261 assert(v);
262
44d8db9e 263 if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
85261803 264 return 1;
44d8db9e 265 else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
85261803
LP		 266 return 0;
267
268 return -EINVAL;
269}
270
3ba686c1 271int parse_pid(const char *s, pid_t* ret_pid) {
0b172489 272 unsigned long ul = 0;
3ba686c1
LP		 273 pid_t pid;
274 int r;
275
276 assert(s);
277 assert(ret_pid);
278
279 if ((r = safe_atolu(s, &ul)) < 0)
280 return r;
281
282 pid = (pid_t) ul;
283
284 if ((unsigned long) pid != ul)
285 return -ERANGE;
286
287 if (pid <= 0)
288 return -ERANGE;
289
290 *ret_pid = pid;
291 return 0;
292}
293
85261803
LP		 294int safe_atou(const char *s, unsigned *ret_u) {
295 char *x = NULL;
034c6ed7 296 unsigned long l;
85261803
LP		 297
298 assert(s);
299 assert(ret_u);
300
301 errno = 0;
302 l = strtoul(s, &x, 0);
303
304 if (!x || *x || errno)
305 return errno ? -errno : -EINVAL;
306
034c6ed7 307 if ((unsigned long) (unsigned) l != l)
85261803
LP		 308 return -ERANGE;
309
310 *ret_u = (unsigned) l;
311 return 0;
312}
313
314int safe_atoi(const char *s, int *ret_i) {
315 char *x = NULL;
034c6ed7 316 long l;
85261803
LP		 317
318 assert(s);
319 assert(ret_i);
320
321 errno = 0;
322 l = strtol(s, &x, 0);
323
324 if (!x || *x || errno)
325 return errno ? -errno : -EINVAL;
326
034c6ed7 327 if ((long) (int) l != l)
85261803
LP		 328 return -ERANGE;
329
034c6ed7
LP		 330 *ret_i = (int) l;
331 return 0;
332}
333
034c6ed7
LP		 334int safe_atollu(const char *s, long long unsigned *ret_llu) {
335 char *x = NULL;
336 unsigned long long l;
337
338 assert(s);
339 assert(ret_llu);
340
341 errno = 0;
342 l = strtoull(s, &x, 0);
343
344 if (!x || *x || errno)
345 return errno ? -errno : -EINVAL;
346
347 *ret_llu = l;
348 return 0;
349}
350
351int safe_atolli(const char *s, long long int *ret_lli) {
352 char *x = NULL;
353 long long l;
354
355 assert(s);
356 assert(ret_lli);
357
358 errno = 0;
359 l = strtoll(s, &x, 0);
360
361 if (!x || *x || errno)
362 return errno ? -errno : -EINVAL;
363
364 *ret_lli = l;
85261803
LP		 365 return 0;
366}
a41e8209 367
a41e8209 368/* Split a string into words. */
65d2ebdc 369char *split(const char *c, size_t *l, const char *separator, char **state) {
a41e8209
LP		 370 char *current;
371
372 current = *state ? *state : (char*) c;
373
374 if (!*current || *c == 0)
375 return NULL;
376
65d2ebdc
LP		 377 current += strspn(current, separator);
378 *l = strcspn(current, separator);
82919e3d
LP		 379 *state = current+*l;
380
381 return (char*) current;
382}
383
034c6ed7
LP		 384/* Split a string into words, but consider strings enclosed in '' and
385 * "" as words even if they include spaces. */
386char *split_quoted(const char *c, size_t *l, char **state) {
0bab36f2
LP		 387 char *current, *e;
388 bool escaped = false;
034c6ed7
LP		 389
390 current = *state ? *state : (char*) c;
391
392 if (!*current || *c == 0)
393 return NULL;
394
395 current += strspn(current, WHITESPACE);
396
397 if (*current == '\'') {
398 current ++;
034c6ed7 399
0bab36f2
LP		 400 for (e = current; *e; e++) {
401 if (escaped)
402 escaped = false;
403 else if (*e == '\\')
404 escaped = true;
405 else if (*e == '\'')
406 break;
407 }
408
409 *l = e-current;
410 *state = *e == 0 ? e : e+1;
034c6ed7
LP		 411 } else if (*current == '\"') {
412 current ++;
034c6ed7 413
0bab36f2
LP		 414 for (e = current; *e; e++) {
415 if (escaped)
416 escaped = false;
417 else if (*e == '\\')
418 escaped = true;
419 else if (*e == '\"')
420 break;
421 }
422
423 *l = e-current;
424 *state = *e == 0 ? e : e+1;
034c6ed7 425 } else {
0bab36f2
LP		 426 for (e = current; *e; e++) {
427 if (escaped)
428 escaped = false;
429 else if (*e == '\\')
430 escaped = true;
431 else if (strchr(WHITESPACE, *e))
432 break;
433 }
434 *l = e-current;
435 *state = e;
034c6ed7
LP		 436 }
437
438 return (char*) current;
439}
440
65d2ebdc
LP		 441char **split_path_and_make_absolute(const char *p) {
442 char **l;
443 assert(p);
444
445 if (!(l = strv_split(p, ":")))
446 return NULL;
447
448 if (!strv_path_make_absolute_cwd(l)) {
449 strv_free(l);
450 return NULL;
451 }
452
453 return l;
454}
455
034c6ed7
LP		 456int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
457 int r;
458 FILE *f;
20c03b7b 459 char fn[PATH_MAX], line[LINE_MAX], *p;
bb00e604 460 long unsigned ppid;
034c6ed7 461
8480e784 462 assert(pid > 0);
034c6ed7
LP		 463 assert(_ppid);
464
bb00e604 465 assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1));
8480e784 466 char_array_0(fn);
034c6ed7
LP		 467
468 if (!(f = fopen(fn, "r")))
469 return -errno;
470
471 if (!(fgets(line, sizeof(line), f))) {
472 r = -errno;
473 fclose(f);
474 return r;
475 }
476
477 fclose(f);
478
479 /* Let's skip the pid and comm fields. The latter is enclosed
480 * in () but does not escape any () in its value, so let's
481 * skip over it manually */
482
483 if (!(p = strrchr(line, ')')))
484 return -EIO;
485
486 p++;
487
488 if (sscanf(p, " "
489 "%*c " /* state */
bb00e604 490 "%lu ", /* ppid */
034c6ed7
LP		 491 &ppid) != 1)
492 return -EIO;
493
bb00e604 494 if ((long unsigned) (pid_t) ppid != ppid)
034c6ed7
LP		 495 return -ERANGE;
496
497 *_ppid = (pid_t) ppid;
498
499 return 0;
500}
501
7640a5de
LP		 502int get_starttime_of_pid(pid_t pid, unsigned long long *st) {
503 int r;
504 FILE *f;
505 char fn[PATH_MAX], line[LINE_MAX], *p;
506
507 assert(pid > 0);
508 assert(st);
509
510 assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1));
511 char_array_0(fn);
512
513 if (!(f = fopen(fn, "r")))
514 return -errno;
515
516 if (!(fgets(line, sizeof(line), f))) {
517 r = -errno;
518 fclose(f);
519 return r;
520 }
521
522 fclose(f);
523
524 /* Let's skip the pid and comm fields. The latter is enclosed
525 * in () but does not escape any () in its value, so let's
526 * skip over it manually */
527
528 if (!(p = strrchr(line, ')')))
529 return -EIO;
530
531 p++;
532
533 if (sscanf(p, " "
534 "%*c " /* state */
535 "%*d " /* ppid */
536 "%*d " /* pgrp */
537 "%*d " /* session */
538 "%*d " /* tty_nr */
539 "%*d " /* tpgid */
540 "%*u " /* flags */
541 "%*u " /* minflt */
542 "%*u " /* cminflt */
543 "%*u " /* majflt */
544 "%*u " /* cmajflt */
545 "%*u " /* utime */
546 "%*u " /* stime */
547 "%*d " /* cutime */
548 "%*d " /* cstime */
549 "%*d " /* priority */
550 "%*d " /* nice */
551 "%*d " /* num_threads */
552 "%*d " /* itrealvalue */
553 "%llu " /* starttime */,
554 st) != 1)
555 return -EIO;
556
557 return 0;
558}
559
034c6ed7
LP		 560int write_one_line_file(const char *fn, const char *line) {
561 FILE *f;
562 int r;
563
564 assert(fn);
565 assert(line);
566
567 if (!(f = fopen(fn, "we")))
568 return -errno;
569
570 if (fputs(line, f) < 0) {
571 r = -errno;
572 goto finish;
573 }
574
8e1bd70d
LP		 575 if (!endswith(line, "\n"))
576 fputc('\n', f);
577
151b190e
LP		 578 fflush(f);
579
580 if (ferror(f)) {
581 if (errno != 0)
582 r = -errno;
583 else
584 r = -EIO;
585 } else
586 r = 0;
587
034c6ed7
LP		 588finish:
589 fclose(f);
590 return r;
591}
592
593int read_one_line_file(const char *fn, char **line) {
594 FILE *f;
595 int r;
97c4a07d 596 char t[LINE_MAX], *c;
034c6ed7
LP		 597
598 assert(fn);
599 assert(line);
600
601 if (!(f = fopen(fn, "re")))
602 return -errno;
603
604 if (!(fgets(t, sizeof(t), f))) {
605 r = -errno;
606 goto finish;
607 }
608
609 if (!(c = strdup(t))) {
610 r = -ENOMEM;
611 goto finish;
612 }
613
6f9a471a
LP		 614 truncate_nl(c);
615
034c6ed7
LP		 616 *line = c;
617 r = 0;
618
619finish:
620 fclose(f);
621 return r;
622}
44d8db9e 623
97c4a07d
LP		 624int read_full_file(const char *fn, char **contents) {
625 FILE *f;
626 int r;
627 size_t n, l;
628 char *buf = NULL;
629 struct stat st;
630
631 if (!(f = fopen(fn, "re")))
632 return -errno;
633
634 if (fstat(fileno(f), &st) < 0) {
635 r = -errno;
636 goto finish;
637 }
638
639 n = st.st_size > 0 ? st.st_size : LINE_MAX;
640 l = 0;
641
642 for (;;) {
643 char *t;
644 size_t k;
645
646 if (!(t = realloc(buf, n+1))) {
647 r = -ENOMEM;
648 goto finish;
649 }
650
651 buf = t;
652 k = fread(buf + l, 1, n - l, f);
653
654 if (k <= 0) {
655 if (ferror(f)) {
656 r = -errno;
657 goto finish;
658 }
659
660 break;
661 }
662
663 l += k;
664 n *= 2;
665
666 /* Safety check */
667 if (n > 4*1024*1024) {
668 r = -E2BIG;
669 goto finish;
670 }
671 }
672
673 if (buf)
674 buf[l] = 0;
675 else if (!(buf = calloc(1, 1))) {
676 r = -errno;
677 goto finish;
678 }
679
680 *contents = buf;
681 buf = NULL;
682
683 r = 0;
684
685finish:
686 fclose(f);
687 free(buf);
688
689 return r;
690}
691
692int parse_env_file(
693 const char *fname,
c899f8c6 694 const char *separator, ...) {
97c4a07d 695
ce8a6aa1 696 int r = 0;
97c4a07d
LP		 697 char *contents, *p;
698
699 assert(fname);
c899f8c6 700 assert(separator);
97c4a07d
LP		 701
702 if ((r = read_full_file(fname, &contents)) < 0)
703 return r;
704
705 p = contents;
706 for (;;) {
707 const char *key = NULL;
708
c899f8c6 709 p += strspn(p, separator);
97c4a07d
LP		 710 p += strspn(p, WHITESPACE);
711
712 if (!*p)
713 break;
714
715 if (!strchr(COMMENTS, *p)) {
716 va_list ap;
717 char **value;
718
c899f8c6 719 va_start(ap, separator);
97c4a07d
LP		 720 while ((key = va_arg(ap, char *))) {
721 size_t n;
722 char *v;
723
724 value = va_arg(ap, char **);
725
726 n = strlen(key);
727 if (strncmp(p, key, n) != 0 ||
728 p[n] != '=')
729 continue;
730
731 p += n + 1;
c899f8c6 732 n = strcspn(p, separator);
97c4a07d
LP		 733
734 if (n >= 2 &&
e7db37dd
LP		 735 strchr(QUOTES, p[0]) &&
736 p[n-1] == p[0])
97c4a07d
LP		 737 v = strndup(p+1, n-2);
738 else
739 v = strndup(p, n);
740
741 if (!v) {
742 r = -ENOMEM;
743 va_end(ap);
744 goto fail;
745 }
746
dd36de4d
KS		 747 if (v[0] == '\0') {
748 /* return empty value strings as NULL */
749 free(v);
750 v = NULL;
751 }
752
97c4a07d
LP		 753 free(*value);
754 *value = v;
755
756 p += n;
ce8a6aa1
LP		 757
758 r ++;
97c4a07d
LP		 759 break;
760 }
761 va_end(ap);
762 }
763
764 if (!key)
c899f8c6 765 p += strcspn(p, separator);
97c4a07d
LP		 766 }
767
97c4a07d
LP		 768fail:
769 free(contents);
770 return r;
771}
772
8c7be95e
LP		 773int load_env_file(
774 const char *fname,
775 char ***rl) {
776
777 FILE *f;
778 char **m = 0;
779 int r;
780
781 assert(fname);
782 assert(rl);
783
784 if (!(f = fopen(fname, "re")))
785 return -errno;
786
787 while (!feof(f)) {
788 char l[LINE_MAX], *p, *u;
789 char **t;
790
791 if (!fgets(l, sizeof(l), f)) {
792 if (feof(f))
793 break;
794
795 r = -errno;
796 goto finish;
797 }
798
799 p = strstrip(l);
800
801 if (!*p)
802 continue;
803
804 if (strchr(COMMENTS, *p))
805 continue;
806
807 if (!(u = normalize_env_assignment(p))) {
808 log_error("Out of memory");
809 r = -ENOMEM;
810 goto finish;
811 }
812
813 t = strv_append(m, u);
814 free(u);
815
816 if (!t) {
817 log_error("Out of memory");
818 r = -ENOMEM;
819 goto finish;
820 }
821
822 strv_free(m);
823 m = t;
824 }
825
826 r = 0;
827
828 *rl = m;
829 m = NULL;
830
831finish:
832 if (f)
833 fclose(f);
834
835 strv_free(m);
836
837 return r;
838}
839
7640a5de
LP		 840int write_env_file(const char *fname, char **l) {
841
842 char **i;
843 FILE *f;
844 int r;
845
846 f = fopen(fname, "we");
847 if (!f)
848 return -errno;
849
850 STRV_FOREACH(i, l) {
851 fputs(*i, f);
852 fputc('\n', f);
853 }
854
855 fflush(f);
856
857 r = ferror(f) ? -errno : 0;
858 fclose(f);
859
860 return r;
861}
862
7072ced8
LP		 863char *truncate_nl(char *s) {
864 assert(s);
865
866 s[strcspn(s, NEWLINE)] = 0;
867 return s;
868}
869
870int get_process_name(pid_t pid, char **name) {
871 char *p;
872 int r;
873
874 assert(pid >= 1);
875 assert(name);
876
bb00e604 877 if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0)
7072ced8
LP		 878 return -ENOMEM;
879
880 r = read_one_line_file(p, name);
881 free(p);
882
883 if (r < 0)
884 return r;
885
7072ced8
LP		 886 return 0;
887}
888
c59760ee
LP		 889int get_process_cmdline(pid_t pid, size_t max_length, char **line) {
890 char *p, *r, *k;
891 int c;
892 bool space = false;
893 size_t left;
894 FILE *f;
895
896 assert(pid >= 1);
897 assert(max_length > 0);
898 assert(line);
899
900 if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0)
901 return -ENOMEM;
902
903 f = fopen(p, "r");
904 free(p);
905
906 if (!f)
907 return -errno;
908
909 if (!(r = new(char, max_length))) {
910 fclose(f);
911 return -ENOMEM;
912 }
913
914 k = r;
915 left = max_length;
916 while ((c = getc(f)) != EOF) {
917
918 if (isprint(c)) {
919 if (space) {
920 if (left <= 4)
921 break;
922
923 *(k++) = ' ';
057fbb58 924 left--;
c59760ee
LP		 925 space = false;
926 }
927
928 if (left <= 4)
929 break;
930
931 *(k++) = (char) c;
057fbb58 932 left--;
c59760ee
LP		 933 } else
934 space = true;
935 }
936
937 if (left <= 4) {
938 size_t n = MIN(left-1, 3U);
939 memcpy(k, "...", n);
940 k[n] = 0;
941 } else
942 *k = 0;
943
944 fclose(f);
945
35d2e7ec
LP		 946 /* Kernel threads have no argv[] */
947 if (r[0] == 0) {
948 char *t;
949 int h;
950
951 free(r);
952
953 if ((h = get_process_name(pid, &t)) < 0)
954 return h;
955
956 h = asprintf(&r, "[%s]", t);
957 free(t);
958
959 if (h < 0)
960 return -ENOMEM;
961 }
fa776d8e 962
c59760ee
LP		 963 *line = r;
964 return 0;
965}
966
fab56fc5
LP		 967char *strnappend(const char *s, const char *suffix, size_t b) {
968 size_t a;
44d8db9e
LP		 969 char *r;
970
fab56fc5
LP		 971 if (!s && !suffix)
972 return strdup("");
973
974 if (!s)
975 return strndup(suffix, b);
976
977 if (!suffix)
978 return strdup(s);
979
44d8db9e
LP		 980 assert(s);
981 assert(suffix);
982
983 a = strlen(s);
44d8db9e
LP		 984
985 if (!(r = new(char, a+b+1)))
986 return NULL;
987
988 memcpy(r, s, a);
989 memcpy(r+a, suffix, b);
990 r[a+b] = 0;
991
992 return r;
993}
87f0e418 994
fab56fc5
LP		 995char *strappend(const char *s, const char *suffix) {
996 return strnappend(s, suffix, suffix ? strlen(suffix) : 0);
997}
998
87f0e418
LP		 999int readlink_malloc(const char *p, char **r) {
1000 size_t l = 100;
1001
1002 assert(p);
1003 assert(r);
1004
1005 for (;;) {
1006 char *c;
1007 ssize_t n;
1008
1009 if (!(c = new(char, l)))
1010 return -ENOMEM;
1011
1012 if ((n = readlink(p, c, l-1)) < 0) {
1013 int ret = -errno;
1014 free(c);
1015 return ret;
1016 }
1017
1018 if ((size_t) n < l-1) {
1019 c[n] = 0;
1020 *r = c;
1021 return 0;
1022 }
1023
1024 free(c);
1025 l *= 2;
1026 }
1027}
1028
2c7108c4
LP		 1029int readlink_and_make_absolute(const char *p, char **r) {
1030 char *target, *k;
1031 int j;
1032
1033 assert(p);
1034 assert(r);
1035
1036 if ((j = readlink_malloc(p, &target)) < 0)
1037 return j;
1038
1039 k = file_in_same_dir(p, target);
1040 free(target);
1041
1042 if (!k)
1043 return -ENOMEM;
1044
1045 *r = k;
1046 return 0;
1047}
1048
35d2e7ec
LP		 1049int parent_of_path(const char *path, char **_r) {
1050 const char *e, *a = NULL, *b = NULL, *p;
1051 char *r;
1052 bool slash = false;
1053
1054 assert(path);
1055 assert(_r);
1056
1057 if (!*path)
1058 return -EINVAL;
1059
1060 for (e = path; *e; e++) {
1061
1062 if (!slash && *e == '/') {
1063 a = b;
1064 b = e;
1065 slash = true;
1066 } else if (slash && *e != '/')
1067 slash = false;
1068 }
1069
1070 if (*(e-1) == '/')
1071 p = a;
1072 else
1073 p = b;
1074
1075 if (!p)
1076 return -EINVAL;
1077
1078 if (p == path)
1079 r = strdup("/");
1080 else
1081 r = strndup(path, p-path);
1082
1083 if (!r)
1084 return -ENOMEM;
1085
1086 *_r = r;
1087 return 0;
1088}
1089
1090
87f0e418
LP		 1091char *file_name_from_path(const char *p) {
1092 char *r;
1093
1094 assert(p);
1095
1096 if ((r = strrchr(p, '/')))
1097 return r + 1;
1098
1099 return (char*) p;
1100}
0301abf4
LP		 1101
1102bool path_is_absolute(const char *p) {
1103 assert(p);
1104
1105 return p[0] == '/';
1106}
1107
1108bool is_path(const char *p) {
1109
1110 return !!strchr(p, '/');
1111}
1112
1113char *path_make_absolute(const char *p, const char *prefix) {
1114 char *r;
1115
1116 assert(p);
1117
65d2ebdc
LP		 1118 /* Makes every item in the list an absolute path by prepending
1119 * the prefix, if specified and necessary */
1120
0301abf4
LP		 1121 if (path_is_absolute(p) || !prefix)
1122 return strdup(p);
1123
1124 if (asprintf(&r, "%s/%s", prefix, p) < 0)
1125 return NULL;
1126
1127 return r;
1128}
2a987ee8 1129
65d2ebdc
LP		 1130char *path_make_absolute_cwd(const char *p) {
1131 char *cwd, *r;
1132
1133 assert(p);
1134
1135 /* Similar to path_make_absolute(), but prefixes with the
1136 * current working directory. */
1137
1138 if (path_is_absolute(p))
1139 return strdup(p);
1140
1141 if (!(cwd = get_current_dir_name()))
1142 return NULL;
1143
1144 r = path_make_absolute(p, cwd);
1145 free(cwd);
1146
1147 return r;
1148}
1149
1150char **strv_path_make_absolute_cwd(char **l) {
1151 char **s;
1152
1153 /* Goes through every item in the string list and makes it
1154 * absolute. This works in place and won't rollback any
1155 * changes on failure. */
1156
1157 STRV_FOREACH(s, l) {
1158 char *t;
1159
1160 if (!(t = path_make_absolute_cwd(*s)))
1161 return NULL;
1162
1163 free(*s);
1164 *s = t;
1165 }
1166
1167 return l;
1168}
1169
c3f6d675
LP		 1170char **strv_path_canonicalize(char **l) {
1171 char **s;
1172 unsigned k = 0;
1173 bool enomem = false;
1174
1175 if (strv_isempty(l))
1176 return l;
1177
1178 /* Goes through every item in the string list and canonicalize
1179 * the path. This works in place and won't rollback any
1180 * changes on failure. */
1181
1182 STRV_FOREACH(s, l) {
1183 char *t, *u;
1184
1185 t = path_make_absolute_cwd(*s);
1186 free(*s);
1187
1188 if (!t) {
1189 enomem = true;
1190 continue;
1191 }
1192
1193 errno = 0;
1194 u = canonicalize_file_name(t);
1195 free(t);
1196
1197 if (!u) {
1198 if (errno == ENOMEM || !errno)
1199 enomem = true;
1200
1201 continue;
1202 }
1203
1204 l[k++] = u;
1205 }
1206
1207 l[k] = NULL;
1208
1209 if (enomem)
1210 return NULL;
1211
1212 return l;
a9dd2082
LP		 1213}
1214
1215char **strv_path_remove_empty(char **l) {
1216 char **f, **t;
1217
1218 if (!l)
1219 return NULL;
1220
1221 for (f = t = l; *f; f++) {
1222
1223 if (dir_is_empty(*f) > 0) {
1224 free(*f);
1225 continue;
1226 }
1227
1228 *(t++) = *f;
1229 }
1230
1231 *t = NULL;
1232 return l;
c3f6d675
LP		 1233}
1234
2a987ee8
LP		 1235int reset_all_signal_handlers(void) {
1236 int sig;
1237
1238 for (sig = 1; sig < _NSIG; sig++) {
1239 struct sigaction sa;
1240
1241 if (sig == SIGKILL || sig == SIGSTOP)
1242 continue;
1243
1244 zero(sa);
1245 sa.sa_handler = SIG_DFL;
431c32bf 1246 sa.sa_flags = SA_RESTART;
2a987ee8
LP		 1247
1248 /* On Linux the first two RT signals are reserved by
1249 * glibc, and sigaction() will return EINVAL for them. */
1250 if ((sigaction(sig, &sa, NULL) < 0))
1251 if (errno != EINVAL)
1252 return -errno;
1253 }
1254
8e274523 1255 return 0;
2a987ee8 1256}
4a72ff34
LP		 1257
1258char *strstrip(char *s) {
1259 char *e, *l = NULL;
1260
1261 /* Drops trailing whitespace. Modifies the string in
1262 * place. Returns pointer to first non-space character */
1263
1264 s += strspn(s, WHITESPACE);
1265
1266 for (e = s; *e; e++)
1267 if (!strchr(WHITESPACE, *e))
1268 l = e;
1269
1270 if (l)
1271 *(l+1) = 0;
1272 else
1273 *s = 0;
1274
1275 return s;
4a72ff34
LP		 1276}
1277
ee9b5e01
LP		 1278char *delete_chars(char *s, const char *bad) {
1279 char *f, *t;
1280
1281 /* Drops all whitespace, regardless where in the string */
1282
1283 for (f = s, t = s; *f; f++) {
1284 if (strchr(bad, *f))
1285 continue;
1286
1287 *(t++) = *f;
1288 }
1289
1290 *t = 0;
1291
1292 return s;
1293}
1294
4a72ff34
LP		 1295char *file_in_same_dir(const char *path, const char *filename) {
1296 char *e, *r;
1297 size_t k;
1298
1299 assert(path);
1300 assert(filename);
1301
1302 /* This removes the last component of path and appends
1303 * filename, unless the latter is absolute anyway or the
1304 * former isn't */
1305
1306 if (path_is_absolute(filename))
1307 return strdup(filename);
1308
1309 if (!(e = strrchr(path, '/')))
1310 return strdup(filename);
1311
1312 k = strlen(filename);
1313 if (!(r = new(char, e-path+1+k+1)))
1314 return NULL;
1315
1316 memcpy(r, path, e-path+1);
1317 memcpy(r+(e-path)+1, filename, k+1);
1318
1319 return r;
1320}
fb624d04 1321
8c6db833
LP		 1322int safe_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) {
1323 struct stat st;
1324
56cf987f 1325 if (label_mkdir(path, mode) >= 0)
8c6db833
LP		 1326 if (chmod_and_chown(path, mode, uid, gid) < 0)
1327 return -errno;
1328
1329 if (lstat(path, &st) < 0)
1330 return -errno;
1331
1332 if ((st.st_mode & 0777) != mode ||
1333 st.st_uid != uid ||
1334 st.st_gid != gid ||
1335 !S_ISDIR(st.st_mode)) {
1336 errno = EEXIST;
1337 return -errno;
1338 }
1339
1340 return 0;
1341}
1342
1343
a9f5d454
LP		 1344int mkdir_parents(const char *path, mode_t mode) {
1345 const char *p, *e;
1346
1347 assert(path);
1348
1349 /* Creates every parent directory in the path except the last
1350 * component. */
1351
1352 p = path + strspn(path, "/");
1353 for (;;) {
1354 int r;
1355 char *t;
1356
1357 e = p + strcspn(p, "/");
1358 p = e + strspn(e, "/");
1359
1360 /* Is this the last component? If so, then we're
1361 * done */
1362 if (*p == 0)
1363 return 0;
1364
1365 if (!(t = strndup(path, e - path)))
1366 return -ENOMEM;
1367
56cf987f 1368 r = label_mkdir(t, mode);
a9f5d454
LP		 1369 free(t);
1370
1371 if (r < 0 && errno != EEXIST)
1372 return -errno;
1373 }
1374}
1375
bbd67135
LP		 1376int mkdir_p(const char *path, mode_t mode) {
1377 int r;
1378
1379 /* Like mkdir -p */
1380
1381 if ((r = mkdir_parents(path, mode)) < 0)
1382 return r;
1383
56cf987f 1384 if (label_mkdir(path, mode) < 0 && errno != EEXIST)
bbd67135
LP		 1385 return -errno;
1386
1387 return 0;
1388}
1389
c32dd69b
LP		 1390int rmdir_parents(const char *path, const char *stop) {
1391 size_t l;
1392 int r = 0;
1393
1394 assert(path);
1395 assert(stop);
1396
1397 l = strlen(path);
1398
1399 /* Skip trailing slashes */
1400 while (l > 0 && path[l-1] == '/')
1401 l--;
1402
1403 while (l > 0) {
1404 char *t;
1405
1406 /* Skip last component */
1407 while (l > 0 && path[l-1] != '/')
1408 l--;
1409
1410 /* Skip trailing slashes */
1411 while (l > 0 && path[l-1] == '/')
1412 l--;
1413
1414 if (l <= 0)
1415 break;
1416
1417 if (!(t = strndup(path, l)))
1418 return -ENOMEM;
1419
1420 if (path_startswith(stop, t)) {
1421 free(t);
1422 return 0;
1423 }
1424
1425 r = rmdir(t);
1426 free(t);
1427
1428 if (r < 0)
1429 if (errno != ENOENT)
1430 return -errno;
1431 }
1432
1433 return 0;
1434}
1435
1436
fb624d04
LP		 1437char hexchar(int x) {
1438 static const char table[16] = "0123456789abcdef";
1439
1440 return table[x & 15];
1441}
4fe88d28
LP		 1442
1443int unhexchar(char c) {
1444
1445 if (c >= '0' && c <= '9')
1446 return c - '0';
1447
1448 if (c >= 'a' && c <= 'f')
ea430986 1449 return c - 'a' + 10;
4fe88d28
LP		 1450
1451 if (c >= 'A' && c <= 'F')
ea430986 1452 return c - 'A' + 10;
4fe88d28
LP		 1453
1454 return -1;
1455}
1456
1457char octchar(int x) {
1458 return '0' + (x & 7);
1459}
1460
1461int unoctchar(char c) {
1462
1463 if (c >= '0' && c <= '7')
1464 return c - '0';
1465
1466 return -1;
1467}
1468
5af98f82
LP		 1469char decchar(int x) {
1470 return '0' + (x % 10);
1471}
1472
1473int undecchar(char c) {
1474
1475 if (c >= '0' && c <= '9')
1476 return c - '0';
1477
1478 return -1;
1479}
1480
4fe88d28
LP		 1481char *cescape(const char *s) {
1482 char *r, *t;
1483 const char *f;
1484
1485 assert(s);
1486
1487 /* Does C style string escaping. */
1488
1489 if (!(r = new(char, strlen(s)*4 + 1)))
1490 return NULL;
1491
1492 for (f = s, t = r; *f; f++)
1493
1494 switch (*f) {
1495
1496 case '\a':
1497 *(t++) = '\\';
1498 *(t++) = 'a';
1499 break;
1500 case '\b':
1501 *(t++) = '\\';
1502 *(t++) = 'b';
1503 break;
1504 case '\f':
1505 *(t++) = '\\';
1506 *(t++) = 'f';
1507 break;
1508 case '\n':
1509 *(t++) = '\\';
1510 *(t++) = 'n';
1511 break;
1512 case '\r':
1513 *(t++) = '\\';
1514 *(t++) = 'r';
1515 break;
1516 case '\t':
1517 *(t++) = '\\';
1518 *(t++) = 't';
1519 break;
1520 case '\v':
1521 *(t++) = '\\';
1522 *(t++) = 'v';
1523 break;
1524 case '\\':
1525 *(t++) = '\\';
1526 *(t++) = '\\';
1527 break;
1528 case '"':
1529 *(t++) = '\\';
1530 *(t++) = '"';
1531 break;
1532 case '\'':
1533 *(t++) = '\\';
1534 *(t++) = '\'';
1535 break;
1536
1537 default:
1538 /* For special chars we prefer octal over
1539 * hexadecimal encoding, simply because glib's
1540 * g_strescape() does the same */
1541 if ((*f < ' ') || (*f >= 127)) {
1542 *(t++) = '\\';
1543 *(t++) = octchar((unsigned char) *f >> 6);
1544 *(t++) = octchar((unsigned char) *f >> 3);
1545 *(t++) = octchar((unsigned char) *f);
1546 } else
1547 *(t++) = *f;
1548 break;
1549 }
1550
1551 *t = 0;
1552
1553 return r;
1554}
1555
6febfd0d 1556char *cunescape_length(const char *s, size_t length) {
4fe88d28
LP		 1557 char *r, *t;
1558 const char *f;
1559
1560 assert(s);
1561
1562 /* Undoes C style string escaping */
1563
6febfd0d 1564 if (!(r = new(char, length+1)))
4fe88d28
LP		 1565 return r;
1566
6febfd0d 1567 for (f = s, t = r; f < s + length; f++) {
4fe88d28
LP		 1568
1569 if (*f != '\\') {
1570 *(t++) = *f;
1571 continue;
1572 }
1573
1574 f++;
1575
1576 switch (*f) {
1577
1578 case 'a':
1579 *(t++) = '\a';
1580 break;
1581 case 'b':
1582 *(t++) = '\b';
1583 break;
1584 case 'f':
1585 *(t++) = '\f';
1586 break;
1587 case 'n':
1588 *(t++) = '\n';
1589 break;
1590 case 'r':
1591 *(t++) = '\r';
1592 break;
1593 case 't':
1594 *(t++) = '\t';
1595 break;
1596 case 'v':
1597 *(t++) = '\v';
1598 break;
1599 case '\\':
1600 *(t++) = '\\';
1601 break;
1602 case '"':
1603 *(t++) = '"';
1604 break;
1605 case '\'':
1606 *(t++) = '\'';
1607 break;
1608
e167fb86
LP		 1609 case 's':
1610 /* This is an extension of the XDG syntax files */
1611 *(t++) = ' ';
1612 break;
1613
4fe88d28
LP		 1614 case 'x': {
1615 /* hexadecimal encoding */
1616 int a, b;
1617
1618 if ((a = unhexchar(f[1])) < 0 ||
1619 (b = unhexchar(f[2])) < 0) {
1620 /* Invalid escape code, let's take it literal then */
1621 *(t++) = '\\';
1622 *(t++) = 'x';
1623 } else {
1624 *(t++) = (char) ((a << 4) | b);
1625 f += 2;
1626 }
1627
1628 break;
1629 }
1630
1631 case '0':
1632 case '1':
1633 case '2':
1634 case '3':
1635 case '4':
1636 case '5':
1637 case '6':
1638 case '7': {
1639 /* octal encoding */
1640 int a, b, c;
1641
1642 if ((a = unoctchar(f[0])) < 0 ||
1643 (b = unoctchar(f[1])) < 0 ||
1644 (c = unoctchar(f[2])) < 0) {
1645 /* Invalid escape code, let's take it literal then */
1646 *(t++) = '\\';
1647 *(t++) = f[0];
1648 } else {
1649 *(t++) = (char) ((a << 6) | (b << 3) | c);
1650 f += 2;
1651 }
1652
1653 break;
1654 }
1655
1656 case 0:
1657 /* premature end of string.*/
1658 *(t++) = '\\';
1659 goto finish;
1660
1661 default:
1662 /* Invalid escape code, let's take it literal then */
1663 *(t++) = '\\';
f3d4cc01 1664 *(t++) = *f;
4fe88d28
LP		 1665 break;
1666 }
1667 }
1668
1669finish:
1670 *t = 0;
1671 return r;
1672}
1673
6febfd0d
LP		 1674char *cunescape(const char *s) {
1675 return cunescape_length(s, strlen(s));
1676}
4fe88d28
LP		 1677
1678char *xescape(const char *s, const char *bad) {
1679 char *r, *t;
1680 const char *f;
1681
1682 /* Escapes all chars in bad, in addition to \ and all special
1683 * chars, in \xFF style escaping. May be reversed with
1684 * cunescape. */
1685
1686 if (!(r = new(char, strlen(s)*4+1)))
1687 return NULL;
1688
1689 for (f = s, t = r; *f; f++) {
1690
b866264a
LP		 1691 if ((*f < ' ') || (*f >= 127) ||
1692 (*f == '\\') || strchr(bad, *f)) {
4fe88d28
LP		 1693 *(t++) = '\\';
1694 *(t++) = 'x';
1695 *(t++) = hexchar(*f >> 4);
1696 *(t++) = hexchar(*f);
1697 } else
1698 *(t++) = *f;
1699 }
1700
1701 *t = 0;
1702
1703 return r;
1704}
1705
ea430986 1706char *bus_path_escape(const char *s) {
ea430986
LP		 1707 char *r, *t;
1708 const char *f;
1709
47be870b
LP		 1710 assert(s);
1711
ea430986
LP		 1712 /* Escapes all chars that D-Bus' object path cannot deal
1713 * with. Can be reverse with bus_path_unescape() */
1714
1715 if (!(r = new(char, strlen(s)*3+1)))
1716 return NULL;
1717
1718 for (f = s, t = r; *f; f++) {
1719
1720 if (!(*f >= 'A' && *f <= 'Z') &&
1721 !(*f >= 'a' && *f <= 'z') &&
1722 !(*f >= '0' && *f <= '9')) {
1723 *(t++) = '_';
1724 *(t++) = hexchar(*f >> 4);
1725 *(t++) = hexchar(*f);
1726 } else
1727 *(t++) = *f;
1728 }
1729
1730 *t = 0;
1731
1732 return r;
1733}
1734
9e2f7c11 1735char *bus_path_unescape(const char *f) {
ea430986 1736 char *r, *t;
ea430986 1737
9e2f7c11 1738 assert(f);
47be870b 1739
9e2f7c11 1740 if (!(r = strdup(f)))
ea430986
LP		 1741 return NULL;
1742
9e2f7c11 1743 for (t = r; *f; f++) {
ea430986
LP		 1744
1745 if (*f == '_') {
1746 int a, b;
1747
1748 if ((a = unhexchar(f[1])) < 0 ||
1749 (b = unhexchar(f[2])) < 0) {
1750 /* Invalid escape code, let's take it literal then */
1751 *(t++) = '_';
1752 } else {
1753 *(t++) = (char) ((a << 4) | b);
1754 f += 2;
1755 }
1756 } else
1757 *(t++) = *f;
1758 }
1759
1760 *t = 0;
1761
1762 return r;
1763}
1764
4fe88d28
LP		 1765char *path_kill_slashes(char *path) {
1766 char *f, *t;
1767 bool slash = false;
1768
1769 /* Removes redundant inner and trailing slashes. Modifies the
1770 * passed string in-place.
1771 *
1772 * ///foo///bar/ becomes /foo/bar
1773 */
1774
1775 for (f = path, t = path; *f; f++) {
1776
1777 if (*f == '/') {
1778 slash = true;
1779 continue;
1780 }
1781
1782 if (slash) {
1783 slash = false;
1784 *(t++) = '/';
1785 }
1786
1787 *(t++) = *f;
1788 }
1789
1790 /* Special rule, if we are talking of the root directory, a
1791 trailing slash is good */
1792
1793 if (t == path && slash)
1794 *(t++) = '/';
1795
1796 *t = 0;
1797 return path;
1798}
1799
1800bool path_startswith(const char *path, const char *prefix) {
1801 assert(path);
1802 assert(prefix);
1803
1804 if ((path[0] == '/') != (prefix[0] == '/'))
1805 return false;
1806
1807 for (;;) {
1808 size_t a, b;
1809
1810 path += strspn(path, "/");
1811 prefix += strspn(prefix, "/");
1812
1813 if (*prefix == 0)
1814 return true;
1815
1816 if (*path == 0)
1817 return false;
1818
1819 a = strcspn(path, "/");
1820 b = strcspn(prefix, "/");
1821
1822 if (a != b)
1823 return false;
1824
1825 if (memcmp(path, prefix, a) != 0)
1826 return false;
1827
1828 path += a;
1829 prefix += b;
1830 }
1831}
1832
15ae422b
LP		 1833bool path_equal(const char *a, const char *b) {
1834 assert(a);
1835 assert(b);
1836
1837 if ((a[0] == '/') != (b[0] == '/'))
1838 return false;
1839
1840 for (;;) {
1841 size_t j, k;
1842
1843 a += strspn(a, "/");
1844 b += strspn(b, "/");
1845
1846 if (*a == 0 && *b == 0)
1847 return true;
1848
1849 if (*a == 0 || *b == 0)
1850 return false;
1851
1852 j = strcspn(a, "/");
1853 k = strcspn(b, "/");
1854
1855 if (j != k)
1856 return false;
1857
1858 if (memcmp(a, b, j) != 0)
1859 return false;
1860
1861 a += j;
1862 b += k;
1863 }
1864}
1865
67d51650 1866char *ascii_strlower(char *t) {
4fe88d28
LP		 1867 char *p;
1868
67d51650 1869 assert(t);
4fe88d28 1870
67d51650 1871 for (p = t; *p; p++)
4fe88d28
LP		 1872 if (*p >= 'A' && *p <= 'Z')
1873 *p = *p - 'A' + 'a';
1874
67d51650 1875 return t;
4fe88d28 1876}
1dccbe19 1877
c85dc17b
LP		 1878bool ignore_file(const char *filename) {
1879 assert(filename);
1880
1881 return
1882 filename[0] == '.' ||
6c78be3c 1883 streq(filename, "lost+found") ||
e472d476
LP		 1884 streq(filename, "aquota.user") ||
1885 streq(filename, "aquota.group") ||
c85dc17b
LP		 1886 endswith(filename, "~") ||
1887 endswith(filename, ".rpmnew") ||
1888 endswith(filename, ".rpmsave") ||
1889 endswith(filename, ".rpmorig") ||
1890 endswith(filename, ".dpkg-old") ||
1891 endswith(filename, ".dpkg-new") ||
1892 endswith(filename, ".swp");
1893}
1894
3a0ecb08
LP		 1895int fd_nonblock(int fd, bool nonblock) {
1896 int flags;
1897
1898 assert(fd >= 0);
1899
1900 if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
1901 return -errno;
1902
1903 if (nonblock)
1904 flags |= O_NONBLOCK;
1905 else
1906 flags &= ~O_NONBLOCK;
1907
1908 if (fcntl(fd, F_SETFL, flags) < 0)
1909 return -errno;
1910
1911 return 0;
1912}
1913
1914int fd_cloexec(int fd, bool cloexec) {
1915 int flags;
1916
1917 assert(fd >= 0);
1918
1919 if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
1920 return -errno;
1921
1922 if (cloexec)
1923 flags |= FD_CLOEXEC;
1924 else
1925 flags &= ~FD_CLOEXEC;
1926
1927 if (fcntl(fd, F_SETFD, flags) < 0)
1928 return -errno;
1929
1930 return 0;
1931}
1932
a0d40ac5
LP		 1933int close_all_fds(const int except[], unsigned n_except) {
1934 DIR *d;
1935 struct dirent *de;
1936 int r = 0;
1937
1938 if (!(d = opendir("/proc/self/fd")))
1939 return -errno;
1940
1941 while ((de = readdir(d))) {
a7610064 1942 int fd = -1;
a0d40ac5 1943
a16e1123 1944 if (ignore_file(de->d_name))
a0d40ac5
LP		 1945 continue;
1946
720ce21d
LP		 1947 if (safe_atoi(de->d_name, &fd) < 0)
1948 /* Let's better ignore this, just in case */
1949 continue;
a0d40ac5
LP		 1950
1951 if (fd < 3)
1952 continue;
1953
1954 if (fd == dirfd(d))
1955 continue;
1956
1957 if (except) {
1958 bool found;
1959 unsigned i;
1960
1961 found = false;
1962 for (i = 0; i < n_except; i++)
1963 if (except[i] == fd) {
1964 found = true;
1965 break;
1966 }
1967
1968 if (found)
1969 continue;
1970 }
1971
720ce21d 1972 if (close_nointr(fd) < 0) {
2f357920 1973 /* Valgrind has its own FD and doesn't want to have it closed */
720ce21d
LP		 1974 if (errno != EBADF && r == 0)
1975 r = -errno;
2f357920 1976 }
a0d40ac5
LP		 1977 }
1978
a0d40ac5
LP		 1979 closedir(d);
1980 return r;
1981}
1982
db12775d
LP		 1983bool chars_intersect(const char *a, const char *b) {
1984 const char *p;
1985
1986 /* Returns true if any of the chars in a are in b. */
1987 for (p = a; *p; p++)
1988 if (strchr(b, *p))
1989 return true;
1990
1991 return false;
1992}
1993
8b6c7120
LP		 1994char *format_timestamp(char *buf, size_t l, usec_t t) {
1995 struct tm tm;
1996 time_t sec;
1997
1998 assert(buf);
1999 assert(l > 0);
2000
2001 if (t <= 0)
2002 return NULL;
2003
f872ec33 2004 sec = (time_t) (t / USEC_PER_SEC);
8b6c7120
LP		 2005
2006 if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
2007 return NULL;
2008
2009 return buf;
2010}
2011
584be568
LP		 2012char *format_timestamp_pretty(char *buf, size_t l, usec_t t) {
2013 usec_t n, d;
2014
2015 n = now(CLOCK_REALTIME);
2016
2017 if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t)
2018 return NULL;
2019
2020 d = n - t;
2021
2022 if (d >= USEC_PER_YEAR)
2023 snprintf(buf, l, "%llu years and %llu months ago",
2024 (unsigned long long) (d / USEC_PER_YEAR),
2025 (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH));
2026 else if (d >= USEC_PER_MONTH)
2027 snprintf(buf, l, "%llu months and %llu days ago",
2028 (unsigned long long) (d / USEC_PER_MONTH),
2029 (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY));
2030 else if (d >= USEC_PER_WEEK)
2031 snprintf(buf, l, "%llu weeks and %llu days ago",
2032 (unsigned long long) (d / USEC_PER_WEEK),
2033 (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY));
2034 else if (d >= 2*USEC_PER_DAY)
2035 snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY));
2036 else if (d >= 25*USEC_PER_HOUR)
2037 snprintf(buf, l, "1 day and %lluh ago",
2038 (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR));
2039 else if (d >= 6*USEC_PER_HOUR)
2040 snprintf(buf, l, "%lluh ago",
2041 (unsigned long long) (d / USEC_PER_HOUR));
2042 else if (d >= USEC_PER_HOUR)
2043 snprintf(buf, l, "%lluh %llumin ago",
2044 (unsigned long long) (d / USEC_PER_HOUR),
2045 (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE));
2046 else if (d >= 5*USEC_PER_MINUTE)
2047 snprintf(buf, l, "%llumin ago",
2048 (unsigned long long) (d / USEC_PER_MINUTE));
2049 else if (d >= USEC_PER_MINUTE)
2050 snprintf(buf, l, "%llumin %llus ago",
2051 (unsigned long long) (d / USEC_PER_MINUTE),
2052 (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC));
2053 else if (d >= USEC_PER_SEC)
2054 snprintf(buf, l, "%llus ago",
2055 (unsigned long long) (d / USEC_PER_SEC));
2056 else if (d >= USEC_PER_MSEC)
2057 snprintf(buf, l, "%llums ago",
2058 (unsigned long long) (d / USEC_PER_MSEC));
2059 else if (d > 0)
2060 snprintf(buf, l, "%lluus ago",
2061 (unsigned long long) d);
2062 else
2063 snprintf(buf, l, "now");
2064
2065 buf[l-1] = 0;
2066 return buf;
2067}
2068
871d7de4
LP		 2069char *format_timespan(char *buf, size_t l, usec_t t) {
2070 static const struct {
2071 const char *suffix;
2072 usec_t usec;
2073 } table[] = {
2074 { "w", USEC_PER_WEEK },
2075 { "d", USEC_PER_DAY },
2076 { "h", USEC_PER_HOUR },
2077 { "min", USEC_PER_MINUTE },
2078 { "s", USEC_PER_SEC },
2079 { "ms", USEC_PER_MSEC },
2080 { "us", 1 },
2081 };
2082
2083 unsigned i;
2084 char *p = buf;
2085
2086 assert(buf);
2087 assert(l > 0);
2088
2089 if (t == (usec_t) -1)
2090 return NULL;
2091
4502d22c
LP		 2092 if (t == 0) {
2093 snprintf(p, l, "0");
2094 p[l-1] = 0;
2095 return p;
2096 }
2097
871d7de4
LP		 2098 /* The result of this function can be parsed with parse_usec */
2099
2100 for (i = 0; i < ELEMENTSOF(table); i++) {
2101 int k;
2102 size_t n;
2103
2104 if (t < table[i].usec)
2105 continue;
2106
2107 if (l <= 1)
2108 break;
2109
2110 k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix);
2111 n = MIN((size_t) k, l);
2112
2113 l -= n;
2114 p += n;
2115
2116 t %= table[i].usec;
2117 }
2118
2119 *p = 0;
2120
2121 return buf;
2122}
2123
42856c10
LP		 2124bool fstype_is_network(const char *fstype) {
2125 static const char * const table[] = {
2126 "cifs",
2127 "smbfs",
2128 "ncpfs",
2129 "nfs",
ca139f94
LP		 2130 "nfs4",
2131 "gfs",
2132 "gfs2"
42856c10
LP		 2133 };
2134
2135 unsigned i;
2136
2137 for (i = 0; i < ELEMENTSOF(table); i++)
2138 if (streq(table[i], fstype))
2139 return true;
2140
2141 return false;
2142}
2143
601f6a1e
LP		 2144int chvt(int vt) {
2145 int fd, r = 0;
2146
74bc3bdc 2147 if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
601f6a1e
LP		 2148 return -errno;
2149
2150 if (vt < 0) {
2151 int tiocl[2] = {
2152 TIOCL_GETKMSGREDIRECT,
2153 0
2154 };
2155
2156 if (ioctl(fd, TIOCLINUX, tiocl) < 0)
2157 return -errno;
2158
2159 vt = tiocl[0] <= 0 ? 1 : tiocl[0];
2160 }
2161
2162 if (ioctl(fd, VT_ACTIVATE, vt) < 0)
2163 r = -errno;
2164
a16e1123 2165 close_nointr_nofail(r);
601f6a1e
LP		 2166 return r;
2167}
2168
80876c20
LP		 2169int read_one_char(FILE *f, char *ret, bool *need_nl) {
2170 struct termios old_termios, new_termios;
2171 char c;
20c03b7b 2172 char line[LINE_MAX];
80876c20
LP		 2173
2174 assert(f);
2175 assert(ret);
2176
2177 if (tcgetattr(fileno(f), &old_termios) >= 0) {
2178 new_termios = old_termios;
2179
2180 new_termios.c_lflag &= ~ICANON;
2181 new_termios.c_cc[VMIN] = 1;
2182 new_termios.c_cc[VTIME] = 0;
2183
2184 if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
2185 size_t k;
2186
2187 k = fread(&c, 1, 1, f);
2188
2189 tcsetattr(fileno(f), TCSADRAIN, &old_termios);
2190
2191 if (k <= 0)
2192 return -EIO;
2193
2194 if (need_nl)
2195 *need_nl = c != '\n';
2196
2197 *ret = c;
2198 return 0;
2199 }
2200 }
2201
2202 if (!(fgets(line, sizeof(line), f)))
2203 return -EIO;
2204
2205 truncate_nl(line);
2206
2207 if (strlen(line) != 1)
2208 return -EBADMSG;
2209
2210 if (need_nl)
2211 *need_nl = false;
2212
2213 *ret = line[0];
2214 return 0;
2215}
2216
2217int ask(char *ret, const char *replies, const char *text, ...) {
1b39d4b9
LP		 2218 bool on_tty;
2219
80876c20
LP		 2220 assert(ret);
2221 assert(replies);
2222 assert(text);
2223
1b39d4b9
LP		 2224 on_tty = isatty(STDOUT_FILENO);
2225
80876c20
LP		 2226 for (;;) {
2227 va_list ap;
2228 char c;
2229 int r;
2230 bool need_nl = true;
2231
1b39d4b9
LP		 2232 if (on_tty)
2233 fputs("\x1B[1m", stdout);
b1b2dc0c 2234
80876c20
LP		 2235 va_start(ap, text);
2236 vprintf(text, ap);
2237 va_end(ap);
2238
1b39d4b9
LP		 2239 if (on_tty)
2240 fputs("\x1B[0m", stdout);
b1b2dc0c 2241
80876c20
LP		 2242 fflush(stdout);
2243
2244 if ((r = read_one_char(stdin, &c, &need_nl)) < 0) {
2245
2246 if (r == -EBADMSG) {
2247 puts("Bad input, please try again.");
2248 continue;
2249 }
2250
2251 putchar('\n');
2252 return r;
2253 }
2254
2255 if (need_nl)
2256 putchar('\n');
2257
2258 if (strchr(replies, c)) {
2259 *ret = c;
2260 return 0;
2261 }
2262
2263 puts("Read unexpected character, please try again.");
2264 }
2265}
2266
6ea832a2 2267int reset_terminal_fd(int fd) {
80876c20
LP		 2268 struct termios termios;
2269 int r = 0;
3fe5e5d4
LP		 2270 long arg;
2271
2272 /* Set terminal to some sane defaults */
80876c20
LP		 2273
2274 assert(fd >= 0);
2275
eed1d0e3
LP		 2276 /* We leave locked terminal attributes untouched, so that
2277 * Plymouth may set whatever it wants to set, and we don't
2278 * interfere with that. */
3fe5e5d4
LP		 2279
2280 /* Disable exclusive mode, just in case */
2281 ioctl(fd, TIOCNXCL);
2282
2283 /* Enable console unicode mode */
2284 arg = K_UNICODE;
2285 ioctl(fd, KDSKBMODE, &arg);
80876c20
LP		 2286
2287 if (tcgetattr(fd, &termios) < 0) {
2288 r = -errno;
2289 goto finish;
2290 }
2291
aaf694ca
LP		 2292 /* We only reset the stuff that matters to the software. How
2293 * hardware is set up we don't touch assuming that somebody
2294 * else will do that for us */
2295
2296 termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
80876c20
LP		 2297 termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
2298 termios.c_oflag |= ONLCR;
2299 termios.c_cflag |= CREAD;
2300 termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
2301
2302 termios.c_cc[VINTR] = 03; /* ^C */
2303 termios.c_cc[VQUIT] = 034; /* ^\ */
2304 termios.c_cc[VERASE] = 0177;
2305 termios.c_cc[VKILL] = 025; /* ^X */
2306 termios.c_cc[VEOF] = 04; /* ^D */
2307 termios.c_cc[VSTART] = 021; /* ^Q */
2308 termios.c_cc[VSTOP] = 023; /* ^S */
2309 termios.c_cc[VSUSP] = 032; /* ^Z */
2310 termios.c_cc[VLNEXT] = 026; /* ^V */
2311 termios.c_cc[VWERASE] = 027; /* ^W */
2312 termios.c_cc[VREPRINT] = 022; /* ^R */
aaf694ca
LP		 2313 termios.c_cc[VEOL] = 0;
2314 termios.c_cc[VEOL2] = 0;
80876c20
LP		 2315
2316 termios.c_cc[VTIME] = 0;
2317 termios.c_cc[VMIN] = 1;
2318
2319 if (tcsetattr(fd, TCSANOW, &termios) < 0)
2320 r = -errno;
2321
2322finish:
2323 /* Just in case, flush all crap out */
2324 tcflush(fd, TCIOFLUSH);
2325
2326 return r;
2327}
2328
6ea832a2
LP		 2329int reset_terminal(const char *name) {
2330 int fd, r;
2331
2332 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
2333 if (fd < 0)
2334 return fd;
2335
2336 r = reset_terminal_fd(fd);
2337 close_nointr_nofail(fd);
2338
2339 return r;
2340}
2341
80876c20
LP		 2342int open_terminal(const char *name, int mode) {
2343 int fd, r;
f73f76ac 2344 unsigned c = 0;
80876c20 2345
f73f76ac
LP		 2346 /*
2347 * If a TTY is in the process of being closed opening it might
2348 * cause EIO. This is horribly awful, but unlikely to be
2349 * changed in the kernel. Hence we work around this problem by
2350 * retrying a couple of times.
2351 *
2352 * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245
2353 */
2354
2355 for (;;) {
2356 if ((fd = open(name, mode)) >= 0)
2357 break;
2358
2359 if (errno != EIO)
2360 return -errno;
2361
2362 if (c >= 20)
2363 return -errno;
2364
2365 usleep(50 * USEC_PER_MSEC);
2366 c++;
2367 }
2368
2369 if (fd < 0)
80876c20
LP		 2370 return -errno;
2371
2372 if ((r = isatty(fd)) < 0) {
2373 close_nointr_nofail(fd);
2374 return -errno;
2375 }
2376
2377 if (!r) {
2378 close_nointr_nofail(fd);
2379 return -ENOTTY;
2380 }
2381
2382 return fd;
2383}
2384
2385int flush_fd(int fd) {
2386 struct pollfd pollfd;
2387
2388 zero(pollfd);
2389 pollfd.fd = fd;
2390 pollfd.events = POLLIN;
2391
2392 for (;;) {
20c03b7b 2393 char buf[LINE_MAX];
80876c20
LP		 2394 ssize_t l;
2395 int r;
2396
2397 if ((r = poll(&pollfd, 1, 0)) < 0) {
2398
2399 if (errno == EINTR)
2400 continue;
2401
2402 return -errno;
2403 }
2404
2405 if (r == 0)
2406 return 0;
2407
2408 if ((l = read(fd, buf, sizeof(buf))) < 0) {
2409
2410 if (errno == EINTR)
2411 continue;
2412
2413 if (errno == EAGAIN)
2414 return 0;
2415
2416 return -errno;
2417 }
2418
2419 if (l <= 0)
2420 return 0;
2421 }
2422}
2423
21de3988 2424int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm) {
bab45044 2425 int fd = -1, notify = -1, r, wd = -1;
80876c20
LP		 2426
2427 assert(name);
2428
2429 /* We use inotify to be notified when the tty is closed. We
2430 * create the watch before checking if we can actually acquire
2431 * it, so that we don't lose any event.
2432 *
2433 * Note: strictly speaking this actually watches for the
2434 * device being closed, it does *not* really watch whether a
2435 * tty loses its controlling process. However, unless some
2436 * rogue process uses TIOCNOTTY on /dev/tty *after* closing
2437 * its tty otherwise this will not become a problem. As long
2438 * as the administrator makes sure not configure any service
2439 * on the same tty as an untrusted user this should not be a
2440 * problem. (Which he probably should not do anyway.) */
2441
2442 if (!fail && !force) {
2443 if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
2444 r = -errno;
2445 goto fail;
2446 }
2447
2448 if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) {
2449 r = -errno;
2450 goto fail;
2451 }
2452 }
2453
2454 for (;;) {
e3d1855b
LP		 2455 if (notify >= 0)
2456 if ((r = flush_fd(notify)) < 0)
2457 goto fail;
80876c20
LP		 2458
2459 /* We pass here O_NOCTTY only so that we can check the return
2460 * value TIOCSCTTY and have a reliable way to figure out if we
2461 * successfully became the controlling process of the tty */
6ea832a2
LP		 2462 if ((fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
2463 return fd;
80876c20
LP		 2464
2465 /* First, try to get the tty */
21de3988
LP		 2466 r = ioctl(fd, TIOCSCTTY, force);
2467
2468 /* Sometimes it makes sense to ignore TIOCSCTTY
2469 * returning EPERM, i.e. when very likely we already
2470 * are have this controlling terminal. */
2471 if (r < 0 && errno == EPERM && ignore_tiocstty_eperm)
2472 r = 0;
2473
2474 if (r < 0 && (force || fail || errno != EPERM)) {
80876c20
LP		 2475 r = -errno;
2476 goto fail;
2477 }
2478
2479 if (r >= 0)
2480 break;
2481
2482 assert(!fail);
2483 assert(!force);
2484 assert(notify >= 0);
2485
2486 for (;;) {
f601daa7 2487 uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX];
80876c20 2488 ssize_t l;
f601daa7 2489 struct inotify_event *e;
80876c20 2490
f601daa7 2491 if ((l = read(notify, &inotify_buffer, sizeof(inotify_buffer))) < 0) {
80876c20 2492
f601daa7
LP		 2493 if (errno == EINTR)
2494 continue;
2495
2496 r = -errno;
2497 goto fail;
2498 }
2499
2500 e = (struct inotify_event*) inotify_buffer;
80876c20 2501
f601daa7
LP		 2502 while (l > 0) {
2503 size_t step;
80876c20 2504
f601daa7 2505 if (e->wd != wd || !(e->mask & IN_CLOSE)) {
80876c20 2506 r = -EIO;
f601daa7
LP		 2507 goto fail;
2508 }
80876c20 2509
f601daa7
LP		 2510 step = sizeof(struct inotify_event) + e->len;
2511 assert(step <= (size_t) l);
80876c20 2512
f601daa7
LP		 2513 e = (struct inotify_event*) ((uint8_t*) e + step);
2514 l -= step;
80876c20
LP		 2515 }
2516
2517 break;
2518 }
2519
2520 /* We close the tty fd here since if the old session
2521 * ended our handle will be dead. It's important that
2522 * we do this after sleeping, so that we don't enter
2523 * an endless loop. */
2524 close_nointr_nofail(fd);
2525 }
2526
2527 if (notify >= 0)
a16e1123 2528 close_nointr_nofail(notify);
80876c20 2529
6ea832a2 2530 if ((r = reset_terminal_fd(fd)) < 0)
80876c20
LP		 2531 log_warning("Failed to reset terminal: %s", strerror(-r));
2532
2533 return fd;
2534
2535fail:
2536 if (fd >= 0)
a16e1123 2537 close_nointr_nofail(fd);
80876c20
LP		 2538
2539 if (notify >= 0)
a16e1123 2540 close_nointr_nofail(notify);
80876c20
LP		 2541
2542 return r;
2543}
2544
2545int release_terminal(void) {
2546 int r = 0, fd;
57cd2192 2547 struct sigaction sa_old, sa_new;
80876c20 2548
57cd2192 2549 if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY)) < 0)
80876c20
LP		 2550 return -errno;
2551
57cd2192
LP		 2552 /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
2553 * by our own TIOCNOTTY */
2554
2555 zero(sa_new);
2556 sa_new.sa_handler = SIG_IGN;
2557 sa_new.sa_flags = SA_RESTART;
2558 assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
2559
80876c20
LP		 2560 if (ioctl(fd, TIOCNOTTY) < 0)
2561 r = -errno;
2562
57cd2192
LP		 2563 assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
2564
80876c20
LP		 2565 close_nointr_nofail(fd);
2566 return r;
2567}
2568
9a34ec5f
LP		 2569int sigaction_many(const struct sigaction *sa, ...) {
2570 va_list ap;
2571 int r = 0, sig;
2572
2573 va_start(ap, sa);
2574 while ((sig = va_arg(ap, int)) > 0)
2575 if (sigaction(sig, sa, NULL) < 0)
2576 r = -errno;
2577 va_end(ap);
2578
2579 return r;
2580}
2581
2582int ignore_signals(int sig, ...) {
a337c6fc 2583 struct sigaction sa;
9a34ec5f
LP		 2584 va_list ap;
2585 int r = 0;
a337c6fc
LP		 2586
2587 zero(sa);
2588 sa.sa_handler = SIG_IGN;
2589 sa.sa_flags = SA_RESTART;
2590
9a34ec5f
LP		 2591 if (sigaction(sig, &sa, NULL) < 0)
2592 r = -errno;
2593
2594 va_start(ap, sig);
2595 while ((sig = va_arg(ap, int)) > 0)
2596 if (sigaction(sig, &sa, NULL) < 0)
2597 r = -errno;
2598 va_end(ap);
2599
2600 return r;
2601}
2602
2603int default_signals(int sig, ...) {
2604 struct sigaction sa;
2605 va_list ap;
2606 int r = 0;
2607
2608 zero(sa);
2609 sa.sa_handler = SIG_DFL;
2610 sa.sa_flags = SA_RESTART;
2611
2612 if (sigaction(sig, &sa, NULL) < 0)
2613 r = -errno;
2614
2615 va_start(ap, sig);
2616 while ((sig = va_arg(ap, int)) > 0)
2617 if (sigaction(sig, &sa, NULL) < 0)
2618 r = -errno;
2619 va_end(ap);
2620
2621 return r;
a337c6fc
LP		 2622}
2623
8d567588
LP		 2624int close_pipe(int p[]) {
2625 int a = 0, b = 0;
2626
2627 assert(p);
2628
2629 if (p[0] >= 0) {
2630 a = close_nointr(p[0]);
2631 p[0] = -1;
2632 }
2633
2634 if (p[1] >= 0) {
2635 b = close_nointr(p[1]);
2636 p[1] = -1;
2637 }
2638
2639 return a < 0 ? a : b;
2640}
2641
eb22ac37 2642ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
8d567588
LP		 2643 uint8_t *p;
2644 ssize_t n = 0;
2645
2646 assert(fd >= 0);
2647 assert(buf);
2648
2649 p = buf;
2650
2651 while (nbytes > 0) {
2652 ssize_t k;
2653
2654 if ((k = read(fd, p, nbytes)) <= 0) {
2655
eb22ac37 2656 if (k < 0 && errno == EINTR)
8d567588
LP		 2657 continue;
2658
eb22ac37 2659 if (k < 0 && errno == EAGAIN && do_poll) {
8d567588
LP		 2660 struct pollfd pollfd;
2661
2662 zero(pollfd);
2663 pollfd.fd = fd;
2664 pollfd.events = POLLIN;
2665
2666 if (poll(&pollfd, 1, -1) < 0) {
2667 if (errno == EINTR)
2668 continue;
2669
2670 return n > 0 ? n : -errno;
2671 }
2672
2673 if (pollfd.revents != POLLIN)
2674 return n > 0 ? n : -EIO;
2675
2676 continue;
2677 }
2678
2679 return n > 0 ? n : (k < 0 ? -errno : 0);
2680 }
2681
2682 p += k;
2683 nbytes -= k;
2684 n += k;
2685 }
2686
2687 return n;
2688}
2689
eb22ac37
LP		 2690ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
2691 const uint8_t *p;
2692 ssize_t n = 0;
2693
2694 assert(fd >= 0);
2695 assert(buf);
2696
2697 p = buf;
2698
2699 while (nbytes > 0) {
2700 ssize_t k;
2701
2702 if ((k = write(fd, p, nbytes)) <= 0) {
2703
2704 if (k < 0 && errno == EINTR)
2705 continue;
2706
2707 if (k < 0 && errno == EAGAIN && do_poll) {
2708 struct pollfd pollfd;
2709
2710 zero(pollfd);
2711 pollfd.fd = fd;
2712 pollfd.events = POLLOUT;
2713
2714 if (poll(&pollfd, 1, -1) < 0) {
2715 if (errno == EINTR)
2716 continue;
2717
2718 return n > 0 ? n : -errno;
2719 }
2720
2721 if (pollfd.revents != POLLOUT)
2722 return n > 0 ? n : -EIO;
2723
2724 continue;
2725 }
2726
2727 return n > 0 ? n : (k < 0 ? -errno : 0);
2728 }
2729
2730 p += k;
2731 nbytes -= k;
2732 n += k;
2733 }
2734
2735 return n;
2736}
2737
8d567588
LP		 2738int path_is_mount_point(const char *t) {
2739 struct stat a, b;
35d2e7ec
LP		 2740 char *parent;
2741 int r;
8d567588
LP		 2742
2743 if (lstat(t, &a) < 0) {
8d567588
LP		 2744 if (errno == ENOENT)
2745 return 0;
2746
2747 return -errno;
2748 }
2749
35d2e7ec
LP		 2750 if ((r = parent_of_path(t, &parent)) < 0)
2751 return r;
8d567588 2752
35d2e7ec
LP		 2753 r = lstat(parent, &b);
2754 free(parent);
8d567588 2755
35d2e7ec
LP		 2756 if (r < 0)
2757 return -errno;
8d567588
LP		 2758
2759 return a.st_dev != b.st_dev;
2760}
2761
24a6e4a4
LP		 2762int parse_usec(const char *t, usec_t *usec) {
2763 static const struct {
2764 const char *suffix;
2765 usec_t usec;
2766 } table[] = {
2767 { "sec", USEC_PER_SEC },
2768 { "s", USEC_PER_SEC },
2769 { "min", USEC_PER_MINUTE },
2770 { "hr", USEC_PER_HOUR },
2771 { "h", USEC_PER_HOUR },
2772 { "d", USEC_PER_DAY },
2773 { "w", USEC_PER_WEEK },
2774 { "msec", USEC_PER_MSEC },
2775 { "ms", USEC_PER_MSEC },
2776 { "m", USEC_PER_MINUTE },
2777 { "usec", 1ULL },
2778 { "us", 1ULL },
2779 { "", USEC_PER_SEC },
2780 };
2781
2782 const char *p;
2783 usec_t r = 0;
2784
2785 assert(t);
2786 assert(usec);
2787
2788 p = t;
2789 do {
2790 long long l;
2791 char *e;
2792 unsigned i;
2793
2794 errno = 0;
2795 l = strtoll(p, &e, 10);
2796
2797 if (errno != 0)
2798 return -errno;
2799
2800 if (l < 0)
2801 return -ERANGE;
2802
2803 if (e == p)
2804 return -EINVAL;
2805
2806 e += strspn(e, WHITESPACE);
2807
2808 for (i = 0; i < ELEMENTSOF(table); i++)
2809 if (startswith(e, table[i].suffix)) {
2810 r += (usec_t) l * table[i].usec;
2811 p = e + strlen(table[i].suffix);
2812 break;
2813 }
2814
2815 if (i >= ELEMENTSOF(table))
2816 return -EINVAL;
2817
2818 } while (*p != 0);
2819
2820 *usec = r;
2821
2822 return 0;
2823}
2824
843d2643
LP		 2825int make_stdio(int fd) {
2826 int r, s, t;
2827
2828 assert(fd >= 0);
2829
2830 r = dup2(fd, STDIN_FILENO);
2831 s = dup2(fd, STDOUT_FILENO);
2832 t = dup2(fd, STDERR_FILENO);
2833
2834 if (fd >= 3)
2835 close_nointr_nofail(fd);
2836
2837 if (r < 0 || s < 0 || t < 0)
2838 return -errno;
2839
2840 return 0;
2841}
2842
ade509ce
LP		 2843int make_null_stdio(void) {
2844 int null_fd;
2845
2846 if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0)
2847 return -errno;
2848
2849 return make_stdio(null_fd);
2850}
2851
8407a5d0
LP		 2852bool is_device_path(const char *path) {
2853
2854 /* Returns true on paths that refer to a device, either in
2855 * sysfs or in /dev */
2856
2857 return
2858 path_startswith(path, "/dev/") ||
2859 path_startswith(path, "/sys/");
2860}
2861
01f78473
LP		 2862int dir_is_empty(const char *path) {
2863 DIR *d;
2864 int r;
2865 struct dirent buf, *de;
2866
2867 if (!(d = opendir(path)))
2868 return -errno;
2869
2870 for (;;) {
2871 if ((r = readdir_r(d, &buf, &de)) > 0) {
2872 r = -r;
2873 break;
2874 }
2875
2876 if (!de) {
2877 r = 1;
2878 break;
2879 }
2880
2881 if (!ignore_file(de->d_name)) {
2882 r = 0;
2883 break;
2884 }
2885 }
2886
2887 closedir(d);
2888 return r;
2889}
2890
d3782d60
LP		 2891unsigned long long random_ull(void) {
2892 int fd;
2893 uint64_t ull;
2894 ssize_t r;
2895
2896 if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0)
2897 goto fallback;
2898
eb22ac37 2899 r = loop_read(fd, &ull, sizeof(ull), true);
d3782d60
LP		 2900 close_nointr_nofail(fd);
2901
2902 if (r != sizeof(ull))
2903 goto fallback;
2904
2905 return ull;
2906
2907fallback:
2908 return random() * RAND_MAX + random();
2909}
2910
5b6319dc
LP		 2911void rename_process(const char name[8]) {
2912 assert(name);
2913
2914 prctl(PR_SET_NAME, name);
2915
2916 /* This is a like a poor man's setproctitle(). The string
2917 * passed should fit in 7 chars (i.e. the length of
2918 * "systemd") */
2919
2920 if (program_invocation_name)
2921 strncpy(program_invocation_name, name, strlen(program_invocation_name));
2922}
2923
7d793605
LP		 2924void sigset_add_many(sigset_t *ss, ...) {
2925 va_list ap;
2926 int sig;
2927
2928 assert(ss);
2929
2930 va_start(ap, ss);
2931 while ((sig = va_arg(ap, int)) > 0)
2932 assert_se(sigaddset(ss, sig) == 0);
2933 va_end(ap);
2934}
2935
ef2f1067
LP		 2936char* gethostname_malloc(void) {
2937 struct utsname u;
2938
2939 assert_se(uname(&u) >= 0);
2940
2941 if (u.nodename[0])
2942 return strdup(u.nodename);
2943
2944 return strdup(u.sysname);
2945}
2946
2947char* getlogname_malloc(void) {
2948 uid_t uid;
2949 long bufsize;
2950 char *buf, *name;
2951 struct passwd pwbuf, *pw = NULL;
2952 struct stat st;
2953
2954 if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
2955 uid = st.st_uid;
2956 else
2957 uid = getuid();
2958
2959 /* Shortcut things to avoid NSS lookups */
2960 if (uid == 0)
2961 return strdup("root");
2962
2963 if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0)
2964 bufsize = 4096;
2965
2966 if (!(buf = malloc(bufsize)))
2967 return NULL;
2968
2969 if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) {
2970 name = strdup(pw->pw_name);
2971 free(buf);
2972 return name;
2973 }
2974
2975 free(buf);
2976
2977 if (asprintf(&name, "%lu", (unsigned long) uid) < 0)
2978 return NULL;
2979
2980 return name;
2981}
2982
fc116c6a
LP		 2983int getttyname_malloc(int fd, char **r) {
2984 char path[PATH_MAX], *c;
618e02c7 2985 int k;
8c6db833
LP		 2986
2987 assert(r);
ef2f1067 2988
fc116c6a 2989 if ((k = ttyname_r(fd, path, sizeof(path))) != 0)
618e02c7 2990 return -k;
ef2f1067
LP		 2991
2992 char_array_0(path);
2993
fc116c6a 2994 if (!(c = strdup(startswith(path, "/dev/") ? path + 5 : path)))
8c6db833
LP		 2995 return -ENOMEM;
2996
2997 *r = c;
2998 return 0;
2999}
3000
fc116c6a
LP		 3001int getttyname_harder(int fd, char **r) {
3002 int k;
3003 char *s;
3004
3005 if ((k = getttyname_malloc(fd, &s)) < 0)
3006 return k;
3007
3008 if (streq(s, "tty")) {
3009 free(s);
46824d0e 3010 return get_ctty(r, NULL);
fc116c6a
LP		 3011 }
3012
3013 *r = s;
3014 return 0;
3015}
3016
3017int get_ctty_devnr(dev_t *d) {
3018 int k;
20c03b7b 3019 char line[LINE_MAX], *p;
fc116c6a
LP		 3020 unsigned long ttynr;
3021 FILE *f;
3022
3023 if (!(f = fopen("/proc/self/stat", "r")))
3024 return -errno;
3025
3026 if (!(fgets(line, sizeof(line), f))) {
3027 k = -errno;
3028 fclose(f);
3029 return k;
3030 }
3031
3032 fclose(f);
3033
3034 if (!(p = strrchr(line, ')')))
3035 return -EIO;
3036
3037 p++;
3038
3039 if (sscanf(p, " "
3040 "%*c " /* state */
3041 "%*d " /* ppid */
3042 "%*d " /* pgrp */
3043 "%*d " /* session */
3044 "%lu ", /* ttynr */
3045 &ttynr) != 1)
3046 return -EIO;
3047
3048 *d = (dev_t) ttynr;
3049 return 0;
3050}
3051
46824d0e 3052int get_ctty(char **r, dev_t *_devnr) {
fc116c6a 3053 int k;
20c03b7b 3054 char fn[PATH_MAX], *s, *b, *p;
fc116c6a
LP		 3055 dev_t devnr;
3056
3057 assert(r);
3058
3059 if ((k = get_ctty_devnr(&devnr)) < 0)
3060 return k;
3061
3062 snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr));
3063 char_array_0(fn);
3064
3065 if ((k = readlink_malloc(fn, &s)) < 0) {
3066
3067 if (k != -ENOENT)
3068 return k;
3069
46824d0e
LP		 3070 /* This is an ugly hack */
3071 if (major(devnr) == 136) {
3072 if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0)
3073 return -ENOMEM;
3074
3075 *r = b;
3076 if (_devnr)
3077 *_devnr = devnr;
3078
3079 return 0;
3080 }
3081
fc116c6a
LP		 3082 /* Probably something like the ptys which have no
3083 * symlink in /dev/char. Let's return something
3084 * vaguely useful. */
3085
3086 if (!(b = strdup(fn + 5)))
3087 return -ENOMEM;
3088
3089 *r = b;
46824d0e
LP		 3090 if (_devnr)
3091 *_devnr = devnr;
3092
fc116c6a
LP		 3093 return 0;
3094 }
3095
3096 if (startswith(s, "/dev/"))
3097 p = s + 5;
3098 else if (startswith(s, "../"))
3099 p = s + 3;
3100 else
3101 p = s;
3102
3103 b = strdup(p);
3104 free(s);
3105
3106 if (!b)
3107 return -ENOMEM;
3108
3109 *r = b;
46824d0e
LP		 3110 if (_devnr)
3111 *_devnr = devnr;
3112
fc116c6a
LP		 3113 return 0;
3114}
3115
8c6db833
LP		 3116static int rm_rf_children(int fd, bool only_dirs) {
3117 DIR *d;
3118 int ret = 0;
3119
3120 assert(fd >= 0);
3121
3122 /* This returns the first error we run into, but nevertheless
3123 * tries to go on */
3124
3125 if (!(d = fdopendir(fd))) {
3126 close_nointr_nofail(fd);
4c633005
LP		 3127
3128 return errno == ENOENT ? 0 : -errno;
8c6db833
LP		 3129 }
3130
3131 for (;;) {
3132 struct dirent buf, *de;
3133 bool is_dir;
3134 int r;
3135
3136 if ((r = readdir_r(d, &buf, &de)) != 0) {
3137 if (ret == 0)
3138 ret = -r;
3139 break;
3140 }
3141
3142 if (!de)
3143 break;
3144
3145 if (streq(de->d_name, ".") || streq(de->d_name, ".."))
3146 continue;
3147
3148 if (de->d_type == DT_UNKNOWN) {
3149 struct stat st;
3150
3151 if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
4c633005 3152 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3153 ret = -errno;
3154 continue;
3155 }
3156
3157 is_dir = S_ISDIR(st.st_mode);
3158 } else
3159 is_dir = de->d_type == DT_DIR;
3160
3161 if (is_dir) {
3162 int subdir_fd;
3163
3164 if ((subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
4c633005 3165 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3166 ret = -errno;
3167 continue;
3168 }
3169
3170 if ((r = rm_rf_children(subdir_fd, only_dirs)) < 0) {
3171 if (ret == 0)
3172 ret = r;
3173 }
3174
3175 if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
4c633005 3176 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3177 ret = -errno;
3178 }
3179 } else if (!only_dirs) {
3180
3181 if (unlinkat(fd, de->d_name, 0) < 0) {
4c633005 3182 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3183 ret = -errno;
3184 }
3185 }
3186 }
3187
3188 closedir(d);
3189
3190 return ret;
3191}
3192
3193int rm_rf(const char *path, bool only_dirs, bool delete_root) {
3194 int fd;
3195 int r;
3196
3197 assert(path);
3198
3199 if ((fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
3200
3201 if (errno != ENOTDIR)
3202 return -errno;
3203
3204 if (delete_root && !only_dirs)
3205 if (unlink(path) < 0)
3206 return -errno;
3207
3208 return 0;
3209 }
3210
3211 r = rm_rf_children(fd, only_dirs);
3212
3213 if (delete_root)
3214 if (rmdir(path) < 0) {
3215 if (r == 0)
3216 r = -errno;
3217 }
3218
3219 return r;
3220}
3221
3222int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
3223 assert(path);
3224
3225 /* Under the assumption that we are running privileged we
3226 * first change the access mode and only then hand out
3227 * ownership to avoid a window where access is too open. */
3228
3229 if (chmod(path, mode) < 0)
3230 return -errno;
3231
3232 if (chown(path, uid, gid) < 0)
3233 return -errno;
3234
3235 return 0;
ef2f1067
LP		 3236}
3237
82c121a4
LP		 3238cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
3239 cpu_set_t *r;
3240 unsigned n = 1024;
3241
3242 /* Allocates the cpuset in the right size */
3243
3244 for (;;) {
3245 if (!(r = CPU_ALLOC(n)))
3246 return NULL;
3247
3248 if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) {
3249 CPU_ZERO_S(CPU_ALLOC_SIZE(n), r);
3250
3251 if (ncpus)
3252 *ncpus = n;
3253
3254 return r;
3255 }
3256
3257 CPU_FREE(r);
3258
3259 if (errno != EINVAL)
3260 return NULL;
3261
3262 n *= 2;
3263 }
3264}
3265
9e58ff9c
LP		 3266void status_vprintf(const char *format, va_list ap) {
3267 char *s = NULL;
3268 int fd = -1;
3269
3270 assert(format);
3271
3272 /* This independent of logging, as status messages are
3273 * optional and go exclusively to the console. */
3274
3275 if (vasprintf(&s, format, ap) < 0)
3276 goto finish;
3277
3278 if ((fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0)
3279 goto finish;
3280
3281 write(fd, s, strlen(s));
3282
3283finish:
3284 free(s);
3285
3286 if (fd >= 0)
3287 close_nointr_nofail(fd);
3288}
3289
c846ff47
LP		 3290void status_printf(const char *format, ...) {
3291 va_list ap;
3292
3293 assert(format);
3294
3295 va_start(ap, format);
3296 status_vprintf(format, ap);
3297 va_end(ap);
3298}
3299
3300void status_welcome(void) {
10aa7034
LP		 3301 char *pretty_name = NULL, *ansi_color = NULL;
3302 const char *const_pretty = NULL, *const_color = NULL;
3303 int r;
c846ff47 3304
10aa7034
LP		 3305 if ((r = parse_env_file("/etc/os-release", NEWLINE,
3306 "PRETTY_NAME", &pretty_name,
3307 "ANSI_COLOR", &ansi_color,
3308 NULL)) < 0) {
c846ff47 3309
10aa7034
LP		 3310 if (r != -ENOENT)
3311 log_warning("Failed to read /etc/os-release: %s", strerror(-r));
3312 }
c846ff47 3313
10aa7034
LP		 3314#if defined(TARGET_FEDORA)
3315 if (!pretty_name) {
3316 if ((r = read_one_line_file("/etc/system-release", &pretty_name)) < 0) {
c846ff47 3317
10aa7034
LP		 3318 if (r != -ENOENT)
3319 log_warning("Failed to read /etc/system-release: %s", strerror(-r));
6f9a471a 3320 }
10aa7034 3321 }
c846ff47 3322
10aa7034 3323 if (!ansi_color && pretty_name) {
c846ff47 3324
10aa7034
LP		 3325 /* This tries to mimic the color magic the old Red Hat sysinit
3326 * script did. */
3327
3328 if (startswith(pretty_name, "Red Hat"))
3329 const_color = "0;31"; /* Red for RHEL */
3330 else if (startswith(pretty_name, "Fedora"))
3331 const_color = "0;34"; /* Blue for Fedora */
3332 }
c846ff47
LP		 3333
3334#elif defined(TARGET_SUSE)
c846ff47 3335
10aa7034
LP		 3336 if (!pretty_name) {
3337 if ((r = read_one_line_file("/etc/SuSE-release", &pretty_name)) < 0) {
c846ff47 3338
10aa7034
LP		 3339 if (r != -ENOENT)
3340 log_warning("Failed to read /etc/SuSE-release: %s", strerror(-r));
6f9a471a 3341 }
10aa7034 3342 }
c846ff47 3343
10aa7034
LP		 3344 if (!ansi_color)
3345 const_color = "0;32"; /* Green for openSUSE */
5a6225fd 3346
0d37b36b 3347#elif defined(TARGET_GENTOO)
0d37b36b 3348
10aa7034
LP		 3349 if (!pretty_name) {
3350 if ((r = read_one_line_file("/etc/gentoo-release", &pretty_name)) < 0) {
0d37b36b 3351
10aa7034
LP		 3352 if (r != -ENOENT)
3353 log_warning("Failed to read /etc/gentoo-release: %s", strerror(-r));
6f9a471a 3354 }
10aa7034 3355 }
0d37b36b 3356
10aa7034
LP		 3357 if (!ansi_color)
3358 const_color = "1;34"; /* Light Blue for Gentoo */
5a6225fd 3359
a338bab5
AS		 3360#elif defined(TARGET_ALTLINUX)
3361
3362 if (!pretty_name) {
3363 if ((r = read_one_line_file("/etc/altlinux-release", &pretty_name)) < 0) {
3364
3365 if (r != -ENOENT)
3366 log_warning("Failed to read /etc/altlinux-release: %s", strerror(-r));
6f9a471a 3367 }
a338bab5
AS		 3368 }
3369
3370 if (!ansi_color)
3371 const_color = "0;36"; /* Cyan for ALTLinux */
3372
3373
5a6225fd 3374#elif defined(TARGET_DEBIAN)
5a6225fd 3375
10aa7034 3376 if (!pretty_name) {
22927a36 3377 char *version;
c8bffa43 3378
22927a36 3379 if ((r = read_one_line_file("/etc/debian_version", &version)) < 0) {
5a6225fd 3380
10aa7034
LP		 3381 if (r != -ENOENT)
3382 log_warning("Failed to read /etc/debian_version: %s", strerror(-r));
22927a36 3383 } else {
22927a36
MB		 3384 pretty_name = strappend("Debian ", version);
3385 free(version);
c8bffa43
LP		 3386
3387 if (!pretty_name)
3388 log_warning("Failed to allocate Debian version string.");
22927a36 3389 }
10aa7034 3390 }
5a6225fd 3391
10aa7034
LP		 3392 if (!ansi_color)
3393 const_color = "1;31"; /* Light Red for Debian */
5a6225fd 3394
274914f9 3395#elif defined(TARGET_UBUNTU)
10aa7034
LP		 3396
3397 if ((r = parse_env_file("/etc/lsb-release", NEWLINE,
3398 "DISTRIB_DESCRIPTION", &pretty_name,
3399 NULL)) < 0) {
3400
3401 if (r != -ENOENT)
3402 log_warning("Failed to read /etc/lsb-release: %s", strerror(-r));
3403 }
3404
3405 if (!ansi_color)
3406 const_color = "0;33"; /* Orange/Brown for Ubuntu */
3407
1de4d79b
AB		 3408#elif defined(TARGET_MANDRIVA)
3409
3410 if (!pretty_name) {
3411 char *s, *p;
3412
3413 if ((r = read_one_line_file("/etc/mandriva-release", &s) < 0)) {
3414 if (r != -ENOENT)
3415 log_warning("Failed to read /etc/mandriva-release: %s", strerror(-r));
3416 } else {
3417 p = strstr(s, " release ");
3418 if (p) {
3419 *p = '\0';
3420 p += 9;
3421 p[strcspn(p, " ")] = '\0';
3422
3423 /* This corresponds to standard rc.sysinit */
3424 if (asprintf(&pretty_name, "%s\x1B[0;39m %s", s, p) > 0)
3425 const_color = "1;36";
3426 else
3427 log_warning("Failed to allocate Mandriva version string.");
3428 } else
3429 log_warning("Failed to parse /etc/mandriva-release");
3430 free(s);
3431 }
3432 }
54e4fdef 3433#elif defined(TARGET_MEEGO)
1de4d79b 3434
54e4fdef
CF		 3435 if (!pretty_name) {
3436 if ((r = read_one_line_file("/etc/meego-release", &pretty_name)) < 0) {
3437
3438 if (r != -ENOENT)
3439 log_warning("Failed to read /etc/meego-release: %s", strerror(-r));
3440 }
3441 }
3442
3443 if (!ansi_color)
3444 const_color = "1;35"; /* Bright Magenta for MeeGo */
c846ff47 3445#endif
10aa7034
LP		 3446
3447 if (!pretty_name && !const_pretty)
3448 const_pretty = "Linux";
3449
3450 if (!ansi_color && !const_color)
3451 const_color = "1";
3452
da71f23c 3453 status_printf("\nWelcome to \x1B[%sm%s\x1B[0m!\n\n",
10aa7034
LP		 3454 const_color ? const_color : ansi_color,
3455 const_pretty ? const_pretty : pretty_name);
86a3475b
LP		 3456
3457 free(ansi_color);
3458 free(pretty_name);
c846ff47
LP		 3459}
3460
fab56fc5
LP		 3461char *replace_env(const char *format, char **env) {
3462 enum {
3463 WORD,
c24eb49e 3464 CURLY,
fab56fc5
LP		 3465 VARIABLE
3466 } state = WORD;
3467
3468 const char *e, *word = format;
3469 char *r = NULL, *k;
3470
3471 assert(format);
3472
3473 for (e = format; *e; e ++) {
3474
3475 switch (state) {
3476
3477 case WORD:
3478 if (*e == '$')
c24eb49e 3479 state = CURLY;
fab56fc5
LP		 3480 break;
3481
c24eb49e
LP		 3482 case CURLY:
3483 if (*e == '{') {
fab56fc5
LP		 3484 if (!(k = strnappend(r, word, e-word-1)))
3485 goto fail;
3486
3487 free(r);
3488 r = k;
3489
3490 word = e-1;
3491 state = VARIABLE;
3492
3493 } else if (*e == '$') {
3494 if (!(k = strnappend(r, word, e-word)))
3495 goto fail;
3496
3497 free(r);
3498 r = k;
3499
3500 word = e+1;
3501 state = WORD;
3502 } else
3503 state = WORD;
3504 break;
3505
3506 case VARIABLE:
c24eb49e 3507 if (*e == '}') {
b95cf362 3508 const char *t;
fab56fc5 3509
b95cf362
LP		 3510 if (!(t = strv_env_get_with_length(env, word+2, e-word-2)))
3511 t = "";
fab56fc5 3512
b95cf362
LP		 3513 if (!(k = strappend(r, t)))
3514 goto fail;
fab56fc5 3515
b95cf362
LP		 3516 free(r);
3517 r = k;
fab56fc5 3518
b95cf362 3519 word = e+1;
fab56fc5
LP		 3520 state = WORD;
3521 }
3522 break;
3523 }
3524 }
3525
3526 if (!(k = strnappend(r, word, e-word)))
3527 goto fail;
3528
3529 free(r);
3530 return k;
3531
3532fail:
3533 free(r);
3534 return NULL;
3535}
3536
3537char **replace_env_argv(char **argv, char **env) {
3538 char **r, **i;
c24eb49e
LP		 3539 unsigned k = 0, l = 0;
3540
3541 l = strv_length(argv);
fab56fc5 3542
c24eb49e 3543 if (!(r = new(char*, l+1)))
fab56fc5
LP		 3544 return NULL;
3545
3546 STRV_FOREACH(i, argv) {
c24eb49e
LP		 3547
3548 /* If $FOO appears as single word, replace it by the split up variable */
b95cf362
LP		 3549 if ((*i)[0] == '$' && (*i)[1] != '{') {
3550 char *e;
3551 char **w, **m;
3552 unsigned q;
c24eb49e 3553
b95cf362 3554 if ((e = strv_env_get(env, *i+1))) {
c24eb49e
LP		 3555
3556 if (!(m = strv_split_quoted(e))) {
3557 r[k] = NULL;
3558 strv_free(r);
3559 return NULL;
3560 }
b95cf362
LP		 3561 } else
3562 m = NULL;
c24eb49e 3563
b95cf362
LP		 3564 q = strv_length(m);
3565 l = l + q - 1;
c24eb49e 3566
b95cf362
LP		 3567 if (!(w = realloc(r, sizeof(char*) * (l+1)))) {
3568 r[k] = NULL;
3569 strv_free(r);
3570 strv_free(m);
3571 return NULL;
3572 }
c24eb49e 3573
b95cf362
LP		 3574 r = w;
3575 if (m) {
c24eb49e
LP		 3576 memcpy(r + k, m, q * sizeof(char*));
3577 free(m);
c24eb49e 3578 }
b95cf362
LP		 3579
3580 k += q;
3581 continue;
c24eb49e
LP		 3582 }
3583
3584 /* If ${FOO} appears as part of a word, replace it by the variable as-is */
fab56fc5
LP		 3585 if (!(r[k++] = replace_env(*i, env))) {
3586 strv_free(r);
3587 return NULL;
3588 }
3589 }
3590
3591 r[k] = NULL;
3592 return r;
3593}
3594
fa776d8e
LP		 3595int columns(void) {
3596 static __thread int parsed_columns = 0;
3597 const char *e;
3598
3599 if (parsed_columns > 0)
3600 return parsed_columns;
3601
3602 if ((e = getenv("COLUMNS")))
3603 parsed_columns = atoi(e);
3604
3605 if (parsed_columns <= 0) {
3606 struct winsize ws;
3607 zero(ws);
3608
9ed95f43 3609 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) >= 0)
fa776d8e
LP		 3610 parsed_columns = ws.ws_col;
3611 }
3612
3613 if (parsed_columns <= 0)
3614 parsed_columns = 80;
3615
3616 return parsed_columns;
3617}
3618
b4f10a5e
LP		 3619int running_in_chroot(void) {
3620 struct stat a, b;
3621
3622 zero(a);
3623 zero(b);
3624
3625 /* Only works as root */
3626
3627 if (stat("/proc/1/root", &a) < 0)
3628 return -errno;
3629
3630 if (stat("/", &b) < 0)
3631 return -errno;
3632
3633 return
3634 a.st_dev != b.st_dev ||
3635 a.st_ino != b.st_ino;
3636}
3637
8fe914ec
LP		 3638char *ellipsize(const char *s, unsigned length, unsigned percent) {
3639 size_t l, x;
3640 char *r;
3641
3642 assert(s);
3643 assert(percent <= 100);
3644 assert(length >= 3);
3645
3646 l = strlen(s);
3647
3648 if (l <= 3 || l <= length)
3649 return strdup(s);
3650
3651 if (!(r = new0(char, length+1)))
3652 return r;
3653
3654 x = (length * percent) / 100;
3655
3656 if (x > length - 3)
3657 x = length - 3;
3658
3659 memcpy(r, s, x);
3660 r[x] = '.';
3661 r[x+1] = '.';
3662 r[x+2] = '.';
3663 memcpy(r + x + 3,
3664 s + l - (length - x - 3),
3665 length - x - 3);
3666
3667 return r;
3668}
3669
f6144808
LP		 3670int touch(const char *path) {
3671 int fd;
3672
3673 assert(path);
3674
14f3c825 3675 if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0)
f6144808
LP		 3676 return -errno;
3677
3678 close_nointr_nofail(fd);
3679 return 0;
3680}
afea26ad 3681
97c4a07d 3682char *unquote(const char *s, const char* quotes) {
11ce3427
LP		 3683 size_t l;
3684 assert(s);
3685
3686 if ((l = strlen(s)) < 2)
3687 return strdup(s);
3688
97c4a07d 3689 if (strchr(quotes, s[0]) && s[l-1] == s[0])
11ce3427
LP		 3690 return strndup(s+1, l-2);
3691
3692 return strdup(s);
3693}
3694
5f7c426e
LP		 3695char *normalize_env_assignment(const char *s) {
3696 char *name, *value, *p, *r;
3697
3698 p = strchr(s, '=');
3699
3700 if (!p) {
3701 if (!(r = strdup(s)))
3702 return NULL;
3703
3704 return strstrip(r);
3705 }
3706
3707 if (!(name = strndup(s, p - s)))
3708 return NULL;
3709
3710 if (!(p = strdup(p+1))) {
3711 free(name);
3712 return NULL;
3713 }
3714
3715 value = unquote(strstrip(p), QUOTES);
3716 free(p);
3717
3718 if (!value) {
5f7c426e
LP		 3719 free(name);
3720 return NULL;
3721 }
3722
3723 if (asprintf(&r, "%s=%s", name, value) < 0)
3724 r = NULL;
3725
3726 free(value);
3727 free(name);
3728
3729 return r;
3730}
3731
8e12a6ae 3732int wait_for_terminate(pid_t pid, siginfo_t *status) {
2e78aa99
LP		 3733 assert(pid >= 1);
3734 assert(status);
3735
3736 for (;;) {
8e12a6ae
LP		 3737 zero(*status);
3738
3739 if (waitid(P_PID, pid, status, WEXITED) < 0) {
2e78aa99
LP		 3740
3741 if (errno == EINTR)
3742 continue;
3743
3744 return -errno;
3745 }
3746
3747 return 0;
3748 }
3749}
3750
97c4a07d
LP		 3751int wait_for_terminate_and_warn(const char *name, pid_t pid) {
3752 int r;
3753 siginfo_t status;
3754
3755 assert(name);
3756 assert(pid > 1);
3757
3758 if ((r = wait_for_terminate(pid, &status)) < 0) {
3759 log_warning("Failed to wait for %s: %s", name, strerror(-r));
3760 return r;
3761 }
3762
3763 if (status.si_code == CLD_EXITED) {
3764 if (status.si_status != 0) {
3765 log_warning("%s failed with error code %i.", name, status.si_status);
0a27cf3f 3766 return status.si_status;
97c4a07d
LP		 3767 }
3768
3769 log_debug("%s succeeded.", name);
3770 return 0;
3771
3772 } else if (status.si_code == CLD_KILLED ||
3773 status.si_code == CLD_DUMPED) {
3774
3775 log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status));
3776 return -EPROTO;
3777 }
3778
3779 log_warning("%s failed due to unknown reason.", name);
3780 return -EPROTO;
3781
3782}
3783
3c14d26c 3784void freeze(void) {
720ce21d
LP		 3785
3786 /* Make sure nobody waits for us on a socket anymore */
3787 close_all_fds(NULL, 0);
3788
c29597a1
LP		 3789 sync();
3790
3c14d26c
LP		 3791 for (;;)
3792 pause();
3793}
3794
00dc5d76
LP		 3795bool null_or_empty(struct stat *st) {
3796 assert(st);
3797
3798 if (S_ISREG(st->st_mode) && st->st_size <= 0)
3799 return true;
3800
c8f26f42 3801 if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode))
00dc5d76
LP		 3802 return true;
3803
3804 return false;
3805}
3806
a247755d 3807DIR *xopendirat(int fd, const char *name, int flags) {
c4731d11
LP		 3808 int nfd;
3809 DIR *d;
3810
3811 if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0)
3812 return NULL;
3813
3814 if (!(d = fdopendir(nfd))) {
3815 close_nointr_nofail(nfd);
3816 return NULL;
3817 }
3818
3819 return d;
3b63d2d3
LP		 3820}
3821
8a0867d6
LP		 3822int signal_from_string_try_harder(const char *s) {
3823 int signo;
3824 assert(s);
3825
3826 if ((signo = signal_from_string(s)) <= 0)
3827 if (startswith(s, "SIG"))
3828 return signal_from_string(s+3);
3829
3830 return signo;
3831}
3832
10717a1a
LP		 3833void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) {
3834
3835 assert(f);
3836 assert(name);
3837 assert(t);
3838
3839 if (!dual_timestamp_is_set(t))
3840 return;
3841
3842 fprintf(f, "%s=%llu %llu\n",
3843 name,
3844 (unsigned long long) t->realtime,
3845 (unsigned long long) t->monotonic);
3846}
3847
799fd0fd 3848void dual_timestamp_deserialize(const char *value, dual_timestamp *t) {
10717a1a
LP		 3849 unsigned long long a, b;
3850
10717a1a
LP		 3851 assert(value);
3852 assert(t);
3853
3854 if (sscanf(value, "%lli %llu", &a, &b) != 2)
3855 log_debug("Failed to parse finish timestamp value %s", value);
3856 else {
3857 t->realtime = a;
3858 t->monotonic = b;
3859 }
3860}
3861
e23a0ce8
LP		 3862char *fstab_node_to_udev_node(const char *p) {
3863 char *dn, *t, *u;
3864 int r;
3865
3866 /* FIXME: to follow udev's logic 100% we need to leave valid
3867 * UTF8 chars unescaped */
3868
3869 if (startswith(p, "LABEL=")) {
3870
3871 if (!(u = unquote(p+6, "\"\'")))
3872 return NULL;
3873
3874 t = xescape(u, "/ ");
3875 free(u);
3876
3877 if (!t)
3878 return NULL;
3879
3880 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
3881 free(t);
3882
3883 if (r < 0)
3884 return NULL;
3885
3886 return dn;
3887 }
3888
3889 if (startswith(p, "UUID=")) {
3890
3891 if (!(u = unquote(p+5, "\"\'")))
3892 return NULL;
3893
3894 t = xescape(u, "/ ");
3895 free(u);
3896
3897 if (!t)
3898 return NULL;
3899
0058d7b9 3900 r = asprintf(&dn, "/dev/disk/by-uuid/%s", t);
e23a0ce8
LP		 3901 free(t);
3902
3903 if (r < 0)
3904 return NULL;
3905
3906 return dn;
3907 }
3908
3909 return strdup(p);
3910}
3911
e9ddabc2
LP		 3912void filter_environ(const char *prefix) {
3913 int i, j;
3914 assert(prefix);
3915
3916 if (!environ)
3917 return;
3918
3919 for (i = 0, j = 0; environ[i]; i++) {
3920
3921 if (startswith(environ[i], prefix))
3922 continue;
3923
3924 environ[j++] = environ[i];
3925 }
3926
3927 environ[j] = NULL;
3928}
3929
f212ac12
LP		 3930bool tty_is_vc(const char *tty) {
3931 assert(tty);
3932
3933 if (startswith(tty, "/dev/"))
3934 tty += 5;
3935
3936 return startswith(tty, "tty") &&
3937 tty[3] >= '0' && tty[3] <= '9';
3938}
3939
e3aa71c3 3940const char *default_term_for_tty(const char *tty) {
3030ccd7
LP		 3941 char *active = NULL;
3942 const char *term;
3943
e3aa71c3
LP		 3944 assert(tty);
3945
3946 if (startswith(tty, "/dev/"))
3947 tty += 5;
3948
3030ccd7
LP		 3949 /* Resolve where /dev/console is pointing when determining
3950 * TERM */
3951 if (streq(tty, "console"))
3952 if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) {
079a09fb
LP		 3953 /* If multiple log outputs are configured the
3954 * last one is what /dev/console points to */
3955 if ((tty = strrchr(active, ' ')))
3956 tty++;
3957 else
3958 tty = active;
3030ccd7
LP		 3959 }
3960
f212ac12 3961 term = tty_is_vc(tty) ? "TERM=linux" : "TERM=vt100";
3030ccd7 3962 free(active);
e3aa71c3 3963
3030ccd7 3964 return term;
e3aa71c3
LP		 3965}
3966
07faed4f
LP		 3967/* Returns a short identifier for the various VM implementations */
3968int detect_vm(const char **id) {
46a08e38
LP		 3969
3970#if defined(__i386__) || defined(__x86_64__)
3971
3972 /* Both CPUID and DMI are x86 specific interfaces... */
3973
721bca57 3974 static const char *const dmi_vendors[] = {
46a08e38
LP		 3975 "/sys/class/dmi/id/sys_vendor",
3976 "/sys/class/dmi/id/board_vendor",
3977 "/sys/class/dmi/id/bios_vendor"
3978 };
3979
4e08da90 3980 static const char dmi_vendor_table[] =
07faed4f
LP		 3981 "QEMU\0" "qemu\0"
3982 /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
3983 "VMware\0" "vmware\0"
3984 "VMW\0" "vmware\0"
3985 "Microsoft Corporation\0" "microsoft\0"
3986 "innotek GmbH\0" "oracle\0"
3987 "Xen\0" "xen\0"
34df5a34 3988 "Bochs\0" "bochs\0";
07faed4f 3989
4e08da90 3990 static const char cpuid_vendor_table[] =
07faed4f
LP		 3991 "XenVMMXenVMM\0" "xen\0"
3992 "KVMKVMKVM\0" "kvm\0"
3993 /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
3994 "VMwareVMware\0" "vmware\0"
3995 /* http://msdn.microsoft.com/en-us/library/ff542428.aspx */
34df5a34 3996 "Microsoft Hv\0" "microsoft\0";
07faed4f
LP		 3997
3998 uint32_t eax, ecx;
46a08e38
LP		 3999 union {
4000 uint32_t sig32[3];
4001 char text[13];
4002 } sig;
46a08e38 4003 unsigned i;
07faed4f 4004 const char *j, *k;
721bca57 4005 bool hypervisor;
46a08e38
LP		 4006
4007 /* http://lwn.net/Articles/301888/ */
4008 zero(sig);
4009
46a08e38
LP		 4010#if defined (__i386__)
4011#define REG_a "eax"
4012#define REG_b "ebx"
4013#elif defined (__amd64__)
4014#define REG_a "rax"
4015#define REG_b "rbx"
4016#endif
4017
07faed4f
LP		 4018 /* First detect whether there is a hypervisor */
4019 eax = 1;
46a08e38
LP		 4020 __asm__ __volatile__ (
4021 /* ebx/rbx is being used for PIC! */
4022 " push %%"REG_b" \n\t"
4023 " cpuid \n\t"
46a08e38
LP		 4024 " pop %%"REG_b" \n\t"
4025
07faed4f 4026 : "=a" (eax), "=c" (ecx)
46a08e38
LP		 4027 : "0" (eax)
4028 );
4029
ec195f55 4030 hypervisor = !!(ecx & 0x80000000U);
721bca57
LP		 4031
4032 if (hypervisor) {
07faed4f
LP		 4033
4034 /* There is a hypervisor, see what it is */
4035 eax = 0x40000000U;
4036 __asm__ __volatile__ (
4037 /* ebx/rbx is being used for PIC! */
4038 " push %%"REG_b" \n\t"
4039 " cpuid \n\t"
4040 " mov %%ebx, %1 \n\t"
4041 " pop %%"REG_b" \n\t"
4042
4043 : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2])
4044 : "0" (eax)
4045 );
4046
4047 NULSTR_FOREACH_PAIR(j, k, cpuid_vendor_table)
4048 if (streq(sig.text, j)) {
4049
4050 if (id)
4051 *id = k;
4052
4053 return 1;
4054 }
721bca57 4055 }
07faed4f 4056
721bca57
LP		 4057 for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) {
4058 char *s;
4059 int r;
4060 const char *found = NULL;
4061
4062 if ((r = read_one_line_file(dmi_vendors[i], &s)) < 0) {
4063 if (r != -ENOENT)
4064 return r;
4065
4066 continue;
4067 }
4068
4069 NULSTR_FOREACH_PAIR(j, k, dmi_vendor_table)
4070 if (startswith(s, j))
4071 found = k;
4072 free(s);
4073
4074 if (found) {
4075 if (id)
4076 *id = found;
4077
4078 return 1;
4079 }
4080 }
4081
4082 if (hypervisor) {
07faed4f
LP		 4083 if (id)
4084 *id = "other";
4085
4086 return 1;
4087 }
46a08e38 4088
721bca57 4089#endif
07faed4f
LP		 4090 return 0;
4091}
4092
ef2df9f4 4093int detect_container(const char **id) {
f9b9232b
LP		 4094 FILE *f;
4095
ef2df9f4
LP		 4096 /* Unfortunately many of these operations require root access
4097 * in one way or another */
f9b9232b 4098
ef2df9f4
LP		 4099 if (geteuid() != 0)
4100 return -EPERM;
4101
4102 if (running_in_chroot() > 0) {
f9b9232b
LP		 4103
4104 if (id)
ef2df9f4 4105 *id = "chroot";
f9b9232b
LP		 4106
4107 return 1;
4108 }
07faed4f 4109
ef2df9f4
LP		 4110 /* /proc/vz exists in container and outside of the container,
4111 * /proc/bc only outside of the container. */
4112 if (access("/proc/vz", F_OK) >= 0 &&
4113 access("/proc/bc", F_OK) < 0) {
07faed4f 4114
ef2df9f4
LP		 4115 if (id)
4116 *id = "openvz";
4117
4118 return 1;
f9b9232b 4119 }
07faed4f 4120
f9b9232b
LP		 4121 if ((f = fopen("/proc/self/cgroup", "r"))) {
4122
4123 for (;;) {
4124 char line[LINE_MAX], *p;
4125
4126 if (!fgets(line, sizeof(line), f))
4127 break;
4128
4129 if (!(p = strchr(strstrip(line), ':')))
4130 continue;
4131
4132 if (strncmp(p, ":ns:", 4))
4133 continue;
4134
4135 if (!streq(p, ":ns:/")) {
4136 fclose(f);
4137
ef2df9f4 4138 if (id)
28cf382a 4139 *id = "pidns";
ef2df9f4
LP		 4140
4141 return 1;
f9b9232b
LP		 4142 }
4143 }
4144
4145 fclose(f);
07faed4f
LP		 4146 }
4147
ef2df9f4
LP		 4148 return 0;
4149}
4150
4151/* Returns a short identifier for the various VM/container implementations */
4152int detect_virtualization(const char **id) {
4153 static __thread const char *cached_id = NULL;
4154 const char *_id;
4155 int r;
4156
4157 if (cached_id) {
4158
4159 if (cached_id == (const char*) -1)
4160 return 0;
4161
4162 if (id)
4163 *id = cached_id;
4164
4165 return 1;
f9b9232b 4166 }
07faed4f 4167
ef2df9f4
LP		 4168 if ((r = detect_container(&_id)) != 0)
4169 goto finish;
4170
f9b9232b 4171 r = detect_vm(&_id);
07faed4f 4172
f9b9232b 4173finish:
ef2df9f4 4174 if (r > 0) {
f9b9232b 4175 cached_id = _id;
07faed4f 4176
ef2df9f4
LP		 4177 if (id)
4178 *id = _id;
4179 } else if (r == 0)
4180 cached_id = (const char*) -1;
f9b9232b
LP		 4181
4182 return r;
46a08e38
LP		 4183}
4184
fb19a739
LP		 4185bool dirent_is_file(struct dirent *de) {
4186 assert(de);
4187
4188 if (ignore_file(de->d_name))
4189 return false;
4190
4191 if (de->d_type != DT_REG &&
4192 de->d_type != DT_LNK &&
4193 de->d_type != DT_UNKNOWN)
4194 return false;
4195
4196 return true;
4197}
4198
83cc030f
LP		 4199void execute_directory(const char *directory, DIR *d, char *argv[]) {
4200 DIR *_d = NULL;
4201 struct dirent *de;
4202 Hashmap *pids = NULL;
4203
4204 assert(directory);
4205
4206 /* Executes all binaries in a directory in parallel and waits
4207 * until all they all finished. */
4208
4209 if (!d) {
4210 if (!(_d = opendir(directory))) {
4211
4212 if (errno == ENOENT)
4213 return;
4214
4215 log_error("Failed to enumerate directory %s: %m", directory);
4216 return;
4217 }
4218
4219 d = _d;
4220 }
4221
4222 if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) {
4223 log_error("Failed to allocate set.");
4224 goto finish;
4225 }
4226
4227 while ((de = readdir(d))) {
4228 char *path;
4229 pid_t pid;
4230 int k;
4231
fb19a739 4232 if (!dirent_is_file(de))
83cc030f
LP		 4233 continue;
4234
4235 if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) {
4236 log_error("Out of memory");
4237 continue;
4238 }
4239
4240 if ((pid = fork()) < 0) {
4241 log_error("Failed to fork: %m");
4242 free(path);
4243 continue;
4244 }
4245
4246 if (pid == 0) {
4247 char *_argv[2];
4248 /* Child */
4249
4250 if (!argv) {
4251 _argv[0] = path;
4252 _argv[1] = NULL;
4253 argv = _argv;
4254 } else
4255 if (!argv[0])
4256 argv[0] = path;
4257
4258 execv(path, argv);
4259
4260 log_error("Failed to execute %s: %m", path);
4261 _exit(EXIT_FAILURE);
4262 }
4263
4264 log_debug("Spawned %s as %lu", path, (unsigned long) pid);
4265
4266 if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) {
4267 log_error("Failed to add PID to set: %s", strerror(-k));
4268 free(path);
4269 }
4270 }
4271
4272 while (!hashmap_isempty(pids)) {
4273 siginfo_t si;
4274 char *path;
4275
4276 zero(si);
4277 if (waitid(P_ALL, 0, &si, WEXITED) < 0) {
4278
4279 if (errno == EINTR)
4280 continue;
4281
4282 log_error("waitid() failed: %m");
4283 goto finish;
4284 }
4285
4286 if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) {
4287 if (!is_clean_exit(si.si_code, si.si_status)) {
4288 if (si.si_code == CLD_EXITED)
4289 log_error("%s exited with exit status %i.", path, si.si_status);
4290 else
4291 log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status));
4292 } else
4293 log_debug("%s exited successfully.", path);
4294
4295 free(path);
4296 }
4297 }
4298
4299finish:
4300 if (_d)
4301 closedir(_d);
4302
4303 if (pids)
4304 hashmap_free_free(pids);
4305}
4306
430c18ed
LP		 4307int kill_and_sigcont(pid_t pid, int sig) {
4308 int r;
4309
4310 r = kill(pid, sig) < 0 ? -errno : 0;
4311
4312 if (r >= 0)
4313 kill(pid, SIGCONT);
4314
4315 return r;
4316}
4317
05feefe0
LP		 4318bool nulstr_contains(const char*nulstr, const char *needle) {
4319 const char *i;
4320
4321 if (!nulstr)
4322 return false;
4323
4324 NULSTR_FOREACH(i, nulstr)
4325 if (streq(i, needle))
4326 return true;
4327
4328 return false;
4329}
4330
6faa1114 4331bool plymouth_running(void) {
9408a2d2 4332 return access("/run/plymouth/pid", F_OK) >= 0;
6faa1114
LP		 4333}
4334
7c3b203c
LP		 4335void parse_syslog_priority(char **p, int *priority) {
4336 int a = 0, b = 0, c = 0;
4337 int k;
4338
4339 assert(p);
4340 assert(*p);
4341 assert(priority);
4342
4343 if ((*p)[0] != '<')
4344 return;
4345
4346 if (!strchr(*p, '>'))
4347 return;
4348
4349 if ((*p)[2] == '>') {
4350 c = undecchar((*p)[1]);
4351 k = 3;
4352 } else if ((*p)[3] == '>') {
4353 b = undecchar((*p)[1]);
4354 c = undecchar((*p)[2]);
4355 k = 4;
4356 } else if ((*p)[4] == '>') {
4357 a = undecchar((*p)[1]);
4358 b = undecchar((*p)[2]);
4359 c = undecchar((*p)[3]);
4360 k = 5;
4361 } else
4362 return;
4363
4364 if (a < 0 || b < 0 || c < 0)
4365 return;
4366
4367 *priority = a*100+b*10+c;
4368 *p += k;
4369}
4370
ac123445
LP		 4371int have_effective_cap(int value) {
4372 cap_t cap;
4373 cap_flag_value_t fv;
4374 int r;
4375
4376 if (!(cap = cap_get_proc()))
4377 return -errno;
4378
4379 if (cap_get_flag(cap, value, CAP_EFFECTIVE, &fv) < 0)
4380 r = -errno;
4381 else
4382 r = fv == CAP_SET;
4383
4384 cap_free(cap);
4385 return r;
4386}
4387
9beb3f4d
LP		 4388char* strshorten(char *s, size_t l) {
4389 assert(s);
4390
4391 if (l < strlen(s))
4392 s[l] = 0;
4393
4394 return s;
4395}
4396
4397static bool hostname_valid_char(char c) {
4398 return
4399 (c >= 'a' && c <= 'z') ||
4400 (c >= 'A' && c <= 'Z') ||
4401 (c >= '0' && c <= '9') ||
4402 c == '-' ||
4403 c == '_' ||
4404 c == '.';
4405}
4406
4407bool hostname_is_valid(const char *s) {
4408 const char *p;
4409
4410 if (isempty(s))
4411 return false;
4412
4413 for (p = s; *p; p++)
4414 if (!hostname_valid_char(*p))
4415 return false;
4416
4417 if (p-s > HOST_NAME_MAX)
4418 return false;
4419
4420 return true;
4421}
4422
4423char* hostname_cleanup(char *s) {
4424 char *p, *d;
4425
4426 for (p = s, d = s; *p; p++)
4427 if ((*p >= 'a' && *p <= 'z') ||
4428 (*p >= 'A' && *p <= 'Z') ||
4429 (*p >= '0' && *p <= '9') ||
4430 *p == '-' ||
4431 *p == '_' ||
4432 *p == '.')
4433 *(d++) = *p;
4434
4435 *d = 0;
4436
4437 strshorten(s, HOST_NAME_MAX);
4438 return s;
4439}
4440
1325aa42
LP		 4441int pipe_eof(int fd) {
4442 struct pollfd pollfd;
4443 int r;
4444
4445 zero(pollfd);
4446 pollfd.fd = fd;
4447 pollfd.events = POLLIN|POLLHUP;
4448
4449 r = poll(&pollfd, 1, 0);
4450 if (r < 0)
4451 return -errno;
4452
4453 if (r == 0)
4454 return 0;
4455
4456 return pollfd.revents & POLLHUP;
4457}
4458
5a3ab509
LP		 4459int fopen_temporary(const char *path, FILE **_f, char **_temp_path) {
4460 FILE *f;
4461 char *t;
4462 const char *fn;
4463 size_t k;
4464 int fd;
4465
4466 assert(path);
4467 assert(_f);
4468 assert(_temp_path);
4469
4470 t = new(char, strlen(path) + 1 + 6 + 1);
4471 if (!t)
4472 return -ENOMEM;
4473
4474 fn = file_name_from_path(path);
4475 k = fn-path;
4476 memcpy(t, path, k);
4477 t[k] = '.';
4478 stpcpy(stpcpy(t+k+1, fn), "XXXXXX");
4479
4480 fd = mkostemp(t, O_WRONLY|O_CLOEXEC);
4481 if (fd < 0) {
4482 free(t);
4483 return -errno;
4484 }
4485
4486 f = fdopen(fd, "we");
4487 if (!f) {
4488 unlink(t);
4489 free(t);
4490 return -errno;
4491 }
4492
4493 *_f = f;
4494 *_temp_path = t;
4495
4496 return 0;
4497}
4498
6ea832a2 4499int terminal_vhangup_fd(int fd) {
5a3ab509
LP		 4500 assert(fd >= 0);
4501
6ea832a2
LP		 4502 if (ioctl(fd, TIOCVHANGUP) < 0)
4503 return -errno;
4504
4505 return 0;
4506}
4507
4508int terminal_vhangup(const char *name) {
4509 int fd, r;
4510
4511 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
4512 if (fd < 0)
4513 return fd;
4514
4515 r = terminal_vhangup_fd(fd);
4516 close_nointr_nofail(fd);
4517
4518 return r;
4519}
4520
4521int vt_disallocate(const char *name) {
4522 int fd, r;
4523 unsigned u;
6ea832a2
LP		 4524
4525 /* Deallocate the VT if possible. If not possible
4526 * (i.e. because it is the active one), at least clear it
4527 * entirely (including the scrollback buffer) */
4528
b83bc4e9
LP		 4529 if (!startswith(name, "/dev/"))
4530 return -EINVAL;
4531
4532 if (!tty_is_vc(name)) {
4533 /* So this is not a VT. I guess we cannot deallocate
4534 * it then. But let's at least clear the screen */
4535
4536 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
4537 if (fd < 0)
4538 return fd;
4539
4540 loop_write(fd, "\033[H\033[2J", 7, false); /* clear screen */
4541 close_nointr_nofail(fd);
4542
4543 return 0;
4544 }
6ea832a2
LP		 4545
4546 if (!startswith(name, "/dev/tty"))
4547 return -EINVAL;
4548
4549 r = safe_atou(name+8, &u);
4550 if (r < 0)
4551 return r;
4552
4553 if (u <= 0)
b83bc4e9 4554 return -EINVAL;
6ea832a2 4555
b83bc4e9 4556 /* Try to deallocate */
6ea832a2
LP		 4557 fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
4558 if (fd < 0)
4559 return fd;
4560
4561 r = ioctl(fd, VT_DISALLOCATE, u);
b83bc4e9 4562 close_nointr_nofail(fd);
6ea832a2 4563
b83bc4e9
LP		 4564 if (r >= 0)
4565 return 0;
6ea832a2 4566
b83bc4e9 4567 if (errno != EBUSY)
6ea832a2 4568 return -errno;
6ea832a2 4569
b83bc4e9
LP		 4570 /* Couldn't deallocate, so let's clear it fully with
4571 * scrollback */
4572 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
6ea832a2 4573 if (fd < 0)
b83bc4e9 4574 return fd;
6ea832a2 4575
b83bc4e9
LP		 4576 /* Requires Linux 2.6.40 */
4577 loop_write(fd, "\033[H\033[3J", 7, false); /* clear screen including scrollback */
4578 close_nointr_nofail(fd);
6ea832a2 4579
b83bc4e9 4580 return 0;
6ea832a2
LP		 4581}
4582
db1413d7
KS		 4583
4584static int file_is_conf(const struct dirent *d, const char *suffix) {
4585 assert(d);
4586
4587 if (ignore_file(d->d_name))
4588 return 0;
4589
4590 if (d->d_type != DT_REG &&
4591 d->d_type != DT_LNK &&
4592 d->d_type != DT_UNKNOWN)
4593 return 0;
4594
4595 return endswith(d->d_name, suffix);
4596}
4597
4598static int files_add(Hashmap *h, const char *path, const char *suffix) {
4599 DIR *dir;
4600 struct dirent *de;
4601 int r = 0;
4602
4603 dir = opendir(path);
4604 if (!dir) {
4605 if (errno == ENOENT)
4606 return 0;
4607 return -errno;
4608 }
4609
4610 for (de = readdir(dir); de; de = readdir(dir)) {
223a3558 4611 char *p, *f;
db1413d7
KS		 4612 const char *base;
4613
4614 if (!file_is_conf(de, suffix))
4615 continue;
4616
223a3558 4617 if (asprintf(&p, "%s/%s", path, de->d_name) < 0) {
db1413d7
KS		 4618 r = -ENOMEM;
4619 goto finish;
4620 }
4621
223a3558
KS		 4622 f = canonicalize_file_name(p);
4623 if (!f) {
4624 log_error("Failed to canonicalize file name '%s': %m", p);
4625 free(p);
4626 continue;
4627 }
4628 free(p);
4629
db1413d7
KS		 4630 log_debug("found: %s\n", f);
4631 base = f + strlen(path) + 1;
4632 if (hashmap_put(h, base, f) <= 0)
4633 free(f);
4634 }
4635
4636finish:
4637 closedir(dir);
4638 return r;
4639}
4640
4641static int base_cmp(const void *a, const void *b) {
4642 const char *s1, *s2;
4643
4644 s1 = *(char * const *)a;
4645 s2 = *(char * const *)b;
4646 return strcmp(file_name_from_path(s1), file_name_from_path(s2));
4647}
4648
44143309 4649int conf_files_list(char ***strv, const char *suffix, const char *dir, ...) {
223a3558
KS		 4650 Hashmap *fh = NULL;
4651 char **dirs = NULL;
db1413d7 4652 char **files = NULL;
223a3558 4653 char **p;
db1413d7 4654 va_list ap;
44143309 4655 int r = 0;
db1413d7 4656
223a3558
KS		 4657 va_start(ap, dir);
4658 dirs = strv_new_ap(dir, ap);
4659 va_end(ap);
4660 if (!dirs) {
4661 r = -ENOMEM;
4662 goto finish;
4663 }
4664 if (!strv_path_canonicalize(dirs)) {
4665 r = -ENOMEM;
4666 goto finish;
4667 }
4668 if (!strv_uniq(dirs)) {
4669 r = -ENOMEM;
4670 goto finish;
4671 }
4672
db1413d7
KS		 4673 fh = hashmap_new(string_hash_func, string_compare_func);
4674 if (!fh) {
44143309 4675 r = -ENOMEM;
db1413d7
KS		 4676 goto finish;
4677 }
4678
223a3558
KS		 4679 STRV_FOREACH(p, dirs) {
4680 if (files_add(fh, *p, suffix) < 0) {
db1413d7 4681 log_error("Failed to search for files.");
44143309 4682 r = -EINVAL;
db1413d7
KS		 4683 goto finish;
4684 }
db1413d7 4685 }
db1413d7
KS		 4686
4687 files = hashmap_get_strv(fh);
4688 if (files == NULL) {
4689 log_error("Failed to compose list of files.");
44143309 4690 r = -ENOMEM;
db1413d7
KS		 4691 goto finish;
4692 }
4693
4694 qsort(files, hashmap_size(fh), sizeof(char *), base_cmp);
8d0e38a2 4695
db1413d7 4696finish:
223a3558 4697 strv_free(dirs);
db1413d7 4698 hashmap_free(fh);
44143309
KS		 4699 *strv = files;
4700 return r;
db1413d7 4701}
7948c4df
KS		 4702
4703bool hwclock_is_localtime(void) {
4704 FILE *f;
4705 char line[LINE_MAX];
4706 bool local = false;
4707
4708 /*
4709 * The third line of adjtime is "UTC" or "LOCAL" or nothing.
4710 * # /etc/adjtime
4711 * 0.0 0 0.0
4712 * 0
4713 * UTC
4714 */
4715 f = fopen("/etc/adjtime", "re");
4716 if (f) {
4717 if (fgets(line, sizeof(line), f) &&
4718 fgets(line, sizeof(line), f) &&
4719 fgets(line, sizeof(line), f) ) {
4720 if (!strcmp(line, "LOCAL\n"))
4721 local = true;
4722 }
4723 fclose(f);
4724 }
4725 return local;
4726}
4727
4728int hwclock_apply_localtime_delta(void) {
4729 const struct timeval *tv_null = NULL;
4730 struct timeval tv;
4731 struct tm *tm;
4732 int minuteswest;
4733 struct timezone tz;
4734
4735 gettimeofday(&tv, NULL);
4736 tm = localtime(&tv.tv_sec);
4737 minuteswest = tm->tm_gmtoff / 60;
4738
4739 tz.tz_minuteswest = -minuteswest;
4740 tz.tz_dsttime = 0; /* DST_NONE*/
4741
4742 /*
4743 * If the hardware clock does not run in UTC, but in local time:
4744 * The very first time we set the kernel's timezone, it will warp
4745 * the clock so that it runs in UTC instead of local time.
4746 */
4747 if (settimeofday(tv_null, &tz) < 0)
4748 return -errno;
4749 else
4750 return minuteswest;
4751}
4752
4753int hwclock_get_time(struct tm *tm) {
4754 int fd;
4755 int err = 0;
4756
4757 fd = open("/dev/rtc0", O_RDONLY|O_CLOEXEC);
4758 if (fd < 0)
4759 return -errno;
4760 if (ioctl(fd, RTC_RD_TIME, tm) < 0)
4761 err = -errno;
4762 close(fd);
4763
4764 return err;
4765}
4766
4767int hwclock_set_time(const struct tm *tm) {
4768 int fd;
4769 int err = 0;
4770
4771 fd = open("/dev/rtc0", O_RDONLY|O_CLOEXEC);
4772 if (fd < 0)
4773 return -errno;
4774 if (ioctl(fd, RTC_SET_TIME, tm) < 0)
4775 err = -errno;
4776 close(fd);
4777
4778 return err;
4779}
f41607a6
LP		 4780
4781static const char *const ioprio_class_table[] = {
4782 [IOPRIO_CLASS_NONE] = "none",
4783 [IOPRIO_CLASS_RT] = "realtime",
4784 [IOPRIO_CLASS_BE] = "best-effort",
4785 [IOPRIO_CLASS_IDLE] = "idle"
4786};
4787
4788DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int);
4789
4790static const char *const sigchld_code_table[] = {
4791 [CLD_EXITED] = "exited",
4792 [CLD_KILLED] = "killed",
4793 [CLD_DUMPED] = "dumped",
4794 [CLD_TRAPPED] = "trapped",
4795 [CLD_STOPPED] = "stopped",
4796 [CLD_CONTINUED] = "continued",
4797};
4798
4799DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
4800
4801static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = {
4802 [LOG_FAC(LOG_KERN)] = "kern",
4803 [LOG_FAC(LOG_USER)] = "user",
4804 [LOG_FAC(LOG_MAIL)] = "mail",
4805 [LOG_FAC(LOG_DAEMON)] = "daemon",
4806 [LOG_FAC(LOG_AUTH)] = "auth",
4807 [LOG_FAC(LOG_SYSLOG)] = "syslog",
4808 [LOG_FAC(LOG_LPR)] = "lpr",
4809 [LOG_FAC(LOG_NEWS)] = "news",
4810 [LOG_FAC(LOG_UUCP)] = "uucp",
4811 [LOG_FAC(LOG_CRON)] = "cron",
4812 [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
4813 [LOG_FAC(LOG_FTP)] = "ftp",
4814 [LOG_FAC(LOG_LOCAL0)] = "local0",
4815 [LOG_FAC(LOG_LOCAL1)] = "local1",
4816 [LOG_FAC(LOG_LOCAL2)] = "local2",
4817 [LOG_FAC(LOG_LOCAL3)] = "local3",
4818 [LOG_FAC(LOG_LOCAL4)] = "local4",
4819 [LOG_FAC(LOG_LOCAL5)] = "local5",
4820 [LOG_FAC(LOG_LOCAL6)] = "local6",
4821 [LOG_FAC(LOG_LOCAL7)] = "local7"
4822};
4823
4824DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int);
4825
4826static const char *const log_level_table[] = {
4827 [LOG_EMERG] = "emerg",
4828 [LOG_ALERT] = "alert",
4829 [LOG_CRIT] = "crit",
4830 [LOG_ERR] = "err",
4831 [LOG_WARNING] = "warning",
4832 [LOG_NOTICE] = "notice",
4833 [LOG_INFO] = "info",
4834 [LOG_DEBUG] = "debug"
4835};
4836
4837DEFINE_STRING_TABLE_LOOKUP(log_level, int);
4838
4839static const char* const sched_policy_table[] = {
4840 [SCHED_OTHER] = "other",
4841 [SCHED_BATCH] = "batch",
4842 [SCHED_IDLE] = "idle",
4843 [SCHED_FIFO] = "fifo",
4844 [SCHED_RR] = "rr"
4845};
4846
4847DEFINE_STRING_TABLE_LOOKUP(sched_policy, int);
4848
4849static const char* const rlimit_table[] = {
4850 [RLIMIT_CPU] = "LimitCPU",
4851 [RLIMIT_FSIZE] = "LimitFSIZE",
4852 [RLIMIT_DATA] = "LimitDATA",
4853 [RLIMIT_STACK] = "LimitSTACK",
4854 [RLIMIT_CORE] = "LimitCORE",
4855 [RLIMIT_RSS] = "LimitRSS",
4856 [RLIMIT_NOFILE] = "LimitNOFILE",
4857 [RLIMIT_AS] = "LimitAS",
4858 [RLIMIT_NPROC] = "LimitNPROC",
4859 [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
4860 [RLIMIT_LOCKS] = "LimitLOCKS",
4861 [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
4862 [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
4863 [RLIMIT_NICE] = "LimitNICE",
4864 [RLIMIT_RTPRIO] = "LimitRTPRIO",
4865 [RLIMIT_RTTIME] = "LimitRTTIME"
4866};
4867
4868DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
4869
4870static const char* const ip_tos_table[] = {
4871 [IPTOS_LOWDELAY] = "low-delay",
4872 [IPTOS_THROUGHPUT] = "throughput",
4873 [IPTOS_RELIABILITY] = "reliability",
4874 [IPTOS_LOWCOST] = "low-cost",
4875};
4876
4877DEFINE_STRING_TABLE_LOOKUP(ip_tos, int);
4878
4879static const char *const signal_table[] = {
4880 [SIGHUP] = "HUP",
4881 [SIGINT] = "INT",
4882 [SIGQUIT] = "QUIT",
4883 [SIGILL] = "ILL",
4884 [SIGTRAP] = "TRAP",
4885 [SIGABRT] = "ABRT",
4886 [SIGBUS] = "BUS",
4887 [SIGFPE] = "FPE",
4888 [SIGKILL] = "KILL",
4889 [SIGUSR1] = "USR1",
4890 [SIGSEGV] = "SEGV",
4891 [SIGUSR2] = "USR2",
4892 [SIGPIPE] = "PIPE",
4893 [SIGALRM] = "ALRM",
4894 [SIGTERM] = "TERM",
4895#ifdef SIGSTKFLT
4896 [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */
4897#endif
4898 [SIGCHLD] = "CHLD",
4899 [SIGCONT] = "CONT",
4900 [SIGSTOP] = "STOP",
4901 [SIGTSTP] = "TSTP",
4902 [SIGTTIN] = "TTIN",
4903 [SIGTTOU] = "TTOU",
4904 [SIGURG] = "URG",
4905 [SIGXCPU] = "XCPU",
4906 [SIGXFSZ] = "XFSZ",
4907 [SIGVTALRM] = "VTALRM",
4908 [SIGPROF] = "PROF",
4909 [SIGWINCH] = "WINCH",
4910 [SIGIO] = "IO",
4911 [SIGPWR] = "PWR",
4912 [SIGSYS] = "SYS"
4913};
4914
4915DEFINE_STRING_TABLE_LOOKUP(signal, int);
Unnamed repository; edit this file 'description' to name the repository.