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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>
60918275
LP		 53
54#include "macro.h"
55#include "util.h"
1dccbe19
LP		 56#include "ioprio.h"
57#include "missing.h"
a9f5d454 58#include "log.h"
65d2ebdc 59#include "strv.h"
e51bc1a2 60#include "label.h"
d06dacd0 61#include "exit-status.h"
83cc030f 62#include "hashmap.h"
56cf987f 63
37f85e66 64size_t page_size(void) {
65 static __thread size_t pgsz = 0;
66 long r;
67
68 if (pgsz)
69 return pgsz;
70
71 assert_se((r = sysconf(_SC_PAGESIZE)) > 0);
72
73 pgsz = (size_t) r;
74
75 return pgsz;
76}
77
e05797fb
LP		 78bool streq_ptr(const char *a, const char *b) {
79
80 /* Like streq(), but tries to make sense of NULL pointers */
81
82 if (a && b)
83 return streq(a, b);
84
85 if (!a && !b)
86 return true;
87
88 return false;
89}
90
47be870b 91usec_t now(clockid_t clock_id) {
60918275
LP		 92 struct timespec ts;
93
47be870b 94 assert_se(clock_gettime(clock_id, &ts) == 0);
60918275
LP		 95
96 return timespec_load(&ts);
97}
98
63983207 99dual_timestamp* dual_timestamp_get(dual_timestamp *ts) {
871d7de4
LP		 100 assert(ts);
101
102 ts->realtime = now(CLOCK_REALTIME);
103 ts->monotonic = now(CLOCK_MONOTONIC);
104
105 return ts;
106}
107
60918275
LP		 108usec_t timespec_load(const struct timespec *ts) {
109 assert(ts);
110
111 return
112 (usec_t) ts->tv_sec * USEC_PER_SEC +
113 (usec_t) ts->tv_nsec / NSEC_PER_USEC;
114}
115
116struct timespec *timespec_store(struct timespec *ts, usec_t u) {
117 assert(ts);
118
119 ts->tv_sec = (time_t) (u / USEC_PER_SEC);
120 ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
121
122 return ts;
123}
124
125usec_t timeval_load(const struct timeval *tv) {
126 assert(tv);
127
128 return
129 (usec_t) tv->tv_sec * USEC_PER_SEC +
130 (usec_t) tv->tv_usec;
131}
132
133struct timeval *timeval_store(struct timeval *tv, usec_t u) {
134 assert(tv);
135
136 tv->tv_sec = (time_t) (u / USEC_PER_SEC);
137 tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
138
139 return tv;
140}
141
142bool endswith(const char *s, const char *postfix) {
143 size_t sl, pl;
144
145 assert(s);
146 assert(postfix);
147
148 sl = strlen(s);
149 pl = strlen(postfix);
150
d4d0d4db
LP		 151 if (pl == 0)
152 return true;
153
60918275
LP		 154 if (sl < pl)
155 return false;
156
157 return memcmp(s + sl - pl, postfix, pl) == 0;
158}
159
160bool startswith(const char *s, const char *prefix) {
161 size_t sl, pl;
162
163 assert(s);
164 assert(prefix);
165
166 sl = strlen(s);
167 pl = strlen(prefix);
168
d4d0d4db
LP		 169 if (pl == 0)
170 return true;
171
60918275
LP		 172 if (sl < pl)
173 return false;
174
175 return memcmp(s, prefix, pl) == 0;
176}
177
3177a7fa
MAP		 178bool startswith_no_case(const char *s, const char *prefix) {
179 size_t sl, pl;
180 unsigned i;
181
182 assert(s);
183 assert(prefix);
184
185 sl = strlen(s);
186 pl = strlen(prefix);
187
188 if (pl == 0)
189 return true;
190
191 if (sl < pl)
192 return false;
193
194 for(i = 0; i < pl; ++i) {
195 if (tolower(s[i]) != tolower(prefix[i]))
196 return false;
197 }
198
199 return true;
200}
201
79d6d816
LP		 202bool first_word(const char *s, const char *word) {
203 size_t sl, wl;
204
205 assert(s);
206 assert(word);
207
208 sl = strlen(s);
209 wl = strlen(word);
210
211 if (sl < wl)
212 return false;
213
d4d0d4db
LP		 214 if (wl == 0)
215 return true;
216
79d6d816
LP		 217 if (memcmp(s, word, wl) != 0)
218 return false;
219
d4d0d4db
LP		 220 return s[wl] == 0 ||
221 strchr(WHITESPACE, s[wl]);
79d6d816
LP		 222}
223
42f4e3c4 224int close_nointr(int fd) {
60918275
LP		 225 assert(fd >= 0);
226
227 for (;;) {
228 int r;
229
230 if ((r = close(fd)) >= 0)
231 return r;
232
233 if (errno != EINTR)
234 return r;
235 }
236}
85261803 237
85f136b5 238void close_nointr_nofail(int fd) {
80876c20 239 int saved_errno = errno;
85f136b5
LP		 240
241 /* like close_nointr() but cannot fail, and guarantees errno
242 * is unchanged */
243
244 assert_se(close_nointr(fd) == 0);
80876c20
LP		 245
246 errno = saved_errno;
85f136b5
LP		 247}
248
5b6319dc
LP		 249void close_many(const int fds[], unsigned n_fd) {
250 unsigned i;
251
252 for (i = 0; i < n_fd; i++)
253 close_nointr_nofail(fds[i]);
254}
255
85261803
LP		 256int parse_boolean(const char *v) {
257 assert(v);
258
44d8db9e 259 if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
85261803 260 return 1;
44d8db9e 261 else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
85261803
LP		 262 return 0;
263
264 return -EINVAL;
265}
266
3ba686c1 267int parse_pid(const char *s, pid_t* ret_pid) {
0b172489 268 unsigned long ul = 0;
3ba686c1
LP		 269 pid_t pid;
270 int r;
271
272 assert(s);
273 assert(ret_pid);
274
275 if ((r = safe_atolu(s, &ul)) < 0)
276 return r;
277
278 pid = (pid_t) ul;
279
280 if ((unsigned long) pid != ul)
281 return -ERANGE;
282
283 if (pid <= 0)
284 return -ERANGE;
285
286 *ret_pid = pid;
287 return 0;
288}
289
85261803
LP		 290int safe_atou(const char *s, unsigned *ret_u) {
291 char *x = NULL;
034c6ed7 292 unsigned long l;
85261803
LP		 293
294 assert(s);
295 assert(ret_u);
296
297 errno = 0;
298 l = strtoul(s, &x, 0);
299
300 if (!x || *x || errno)
301 return errno ? -errno : -EINVAL;
302
034c6ed7 303 if ((unsigned long) (unsigned) l != l)
85261803
LP		 304 return -ERANGE;
305
306 *ret_u = (unsigned) l;
307 return 0;
308}
309
310int safe_atoi(const char *s, int *ret_i) {
311 char *x = NULL;
034c6ed7 312 long l;
85261803
LP		 313
314 assert(s);
315 assert(ret_i);
316
317 errno = 0;
318 l = strtol(s, &x, 0);
319
320 if (!x || *x || errno)
321 return errno ? -errno : -EINVAL;
322
034c6ed7 323 if ((long) (int) l != l)
85261803
LP		 324 return -ERANGE;
325
034c6ed7
LP		 326 *ret_i = (int) l;
327 return 0;
328}
329
034c6ed7
LP		 330int safe_atollu(const char *s, long long unsigned *ret_llu) {
331 char *x = NULL;
332 unsigned long long l;
333
334 assert(s);
335 assert(ret_llu);
336
337 errno = 0;
338 l = strtoull(s, &x, 0);
339
340 if (!x || *x || errno)
341 return errno ? -errno : -EINVAL;
342
343 *ret_llu = l;
344 return 0;
345}
346
347int safe_atolli(const char *s, long long int *ret_lli) {
348 char *x = NULL;
349 long long l;
350
351 assert(s);
352 assert(ret_lli);
353
354 errno = 0;
355 l = strtoll(s, &x, 0);
356
357 if (!x || *x || errno)
358 return errno ? -errno : -EINVAL;
359
360 *ret_lli = l;
85261803
LP		 361 return 0;
362}
a41e8209 363
a41e8209 364/* Split a string into words. */
65d2ebdc 365char *split(const char *c, size_t *l, const char *separator, char **state) {
a41e8209
LP		 366 char *current;
367
368 current = *state ? *state : (char*) c;
369
370 if (!*current || *c == 0)
371 return NULL;
372
65d2ebdc
LP		 373 current += strspn(current, separator);
374 *l = strcspn(current, separator);
82919e3d
LP		 375 *state = current+*l;
376
377 return (char*) current;
378}
379
034c6ed7
LP		 380/* Split a string into words, but consider strings enclosed in '' and
381 * "" as words even if they include spaces. */
382char *split_quoted(const char *c, size_t *l, char **state) {
0bab36f2
LP		 383 char *current, *e;
384 bool escaped = false;
034c6ed7
LP		 385
386 current = *state ? *state : (char*) c;
387
388 if (!*current || *c == 0)
389 return NULL;
390
391 current += strspn(current, WHITESPACE);
392
393 if (*current == '\'') {
394 current ++;
034c6ed7 395
0bab36f2
LP		 396 for (e = current; *e; e++) {
397 if (escaped)
398 escaped = false;
399 else if (*e == '\\')
400 escaped = true;
401 else if (*e == '\'')
402 break;
403 }
404
405 *l = e-current;
406 *state = *e == 0 ? e : e+1;
034c6ed7
LP		 407 } else if (*current == '\"') {
408 current ++;
034c6ed7 409
0bab36f2
LP		 410 for (e = current; *e; e++) {
411 if (escaped)
412 escaped = false;
413 else if (*e == '\\')
414 escaped = true;
415 else if (*e == '\"')
416 break;
417 }
418
419 *l = e-current;
420 *state = *e == 0 ? e : e+1;
034c6ed7 421 } else {
0bab36f2
LP		 422 for (e = current; *e; e++) {
423 if (escaped)
424 escaped = false;
425 else if (*e == '\\')
426 escaped = true;
427 else if (strchr(WHITESPACE, *e))
428 break;
429 }
430 *l = e-current;
431 *state = e;
034c6ed7
LP		 432 }
433
434 return (char*) current;
435}
436
65d2ebdc
LP		 437char **split_path_and_make_absolute(const char *p) {
438 char **l;
439 assert(p);
440
441 if (!(l = strv_split(p, ":")))
442 return NULL;
443
444 if (!strv_path_make_absolute_cwd(l)) {
445 strv_free(l);
446 return NULL;
447 }
448
449 return l;
450}
451
034c6ed7
LP		 452int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
453 int r;
454 FILE *f;
455 char fn[132], line[256], *p;
bb00e604 456 long unsigned ppid;
034c6ed7
LP		 457
458 assert(pid >= 0);
459 assert(_ppid);
460
bb00e604 461 assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1));
034c6ed7
LP		 462 fn[sizeof(fn)-1] = 0;
463
464 if (!(f = fopen(fn, "r")))
465 return -errno;
466
467 if (!(fgets(line, sizeof(line), f))) {
468 r = -errno;
469 fclose(f);
470 return r;
471 }
472
473 fclose(f);
474
475 /* Let's skip the pid and comm fields. The latter is enclosed
476 * in () but does not escape any () in its value, so let's
477 * skip over it manually */
478
479 if (!(p = strrchr(line, ')')))
480 return -EIO;
481
482 p++;
483
484 if (sscanf(p, " "
485 "%*c " /* state */
bb00e604 486 "%lu ", /* ppid */
034c6ed7
LP		 487 &ppid) != 1)
488 return -EIO;
489
bb00e604 490 if ((long unsigned) (pid_t) ppid != ppid)
034c6ed7
LP		 491 return -ERANGE;
492
493 *_ppid = (pid_t) ppid;
494
495 return 0;
496}
497
498int write_one_line_file(const char *fn, const char *line) {
499 FILE *f;
500 int r;
501
502 assert(fn);
503 assert(line);
504
505 if (!(f = fopen(fn, "we")))
506 return -errno;
507
508 if (fputs(line, f) < 0) {
509 r = -errno;
510 goto finish;
511 }
512
8e1bd70d
LP		 513 if (!endswith(line, "\n"))
514 fputc('\n', f);
515
034c6ed7
LP		 516 r = 0;
517finish:
518 fclose(f);
519 return r;
520}
521
522int read_one_line_file(const char *fn, char **line) {
523 FILE *f;
524 int r;
97c4a07d 525 char t[LINE_MAX], *c;
034c6ed7
LP		 526
527 assert(fn);
528 assert(line);
529
530 if (!(f = fopen(fn, "re")))
531 return -errno;
532
533 if (!(fgets(t, sizeof(t), f))) {
534 r = -errno;
535 goto finish;
536 }
537
538 if (!(c = strdup(t))) {
539 r = -ENOMEM;
540 goto finish;
541 }
542
543 *line = c;
544 r = 0;
545
546finish:
547 fclose(f);
548 return r;
549}
44d8db9e 550
97c4a07d
LP		 551int read_full_file(const char *fn, char **contents) {
552 FILE *f;
553 int r;
554 size_t n, l;
555 char *buf = NULL;
556 struct stat st;
557
558 if (!(f = fopen(fn, "re")))
559 return -errno;
560
561 if (fstat(fileno(f), &st) < 0) {
562 r = -errno;
563 goto finish;
564 }
565
566 n = st.st_size > 0 ? st.st_size : LINE_MAX;
567 l = 0;
568
569 for (;;) {
570 char *t;
571 size_t k;
572
573 if (!(t = realloc(buf, n+1))) {
574 r = -ENOMEM;
575 goto finish;
576 }
577
578 buf = t;
579 k = fread(buf + l, 1, n - l, f);
580
581 if (k <= 0) {
582 if (ferror(f)) {
583 r = -errno;
584 goto finish;
585 }
586
587 break;
588 }
589
590 l += k;
591 n *= 2;
592
593 /* Safety check */
594 if (n > 4*1024*1024) {
595 r = -E2BIG;
596 goto finish;
597 }
598 }
599
600 if (buf)
601 buf[l] = 0;
602 else if (!(buf = calloc(1, 1))) {
603 r = -errno;
604 goto finish;
605 }
606
607 *contents = buf;
608 buf = NULL;
609
610 r = 0;
611
612finish:
613 fclose(f);
614 free(buf);
615
616 return r;
617}
618
619int parse_env_file(
620 const char *fname,
c899f8c6 621 const char *separator, ...) {
97c4a07d 622
ce8a6aa1 623 int r = 0;
97c4a07d
LP		 624 char *contents, *p;
625
626 assert(fname);
c899f8c6 627 assert(separator);
97c4a07d
LP		 628
629 if ((r = read_full_file(fname, &contents)) < 0)
630 return r;
631
632 p = contents;
633 for (;;) {
634 const char *key = NULL;
635
c899f8c6 636 p += strspn(p, separator);
97c4a07d
LP		 637 p += strspn(p, WHITESPACE);
638
639 if (!*p)
640 break;
641
642 if (!strchr(COMMENTS, *p)) {
643 va_list ap;
644 char **value;
645
c899f8c6 646 va_start(ap, separator);
97c4a07d
LP		 647 while ((key = va_arg(ap, char *))) {
648 size_t n;
649 char *v;
650
651 value = va_arg(ap, char **);
652
653 n = strlen(key);
654 if (strncmp(p, key, n) != 0 ||
655 p[n] != '=')
656 continue;
657
658 p += n + 1;
c899f8c6 659 n = strcspn(p, separator);
97c4a07d
LP		 660
661 if (n >= 2 &&
e7db37dd
LP		 662 strchr(QUOTES, p[0]) &&
663 p[n-1] == p[0])
97c4a07d
LP		 664 v = strndup(p+1, n-2);
665 else
666 v = strndup(p, n);
667
668 if (!v) {
669 r = -ENOMEM;
670 va_end(ap);
671 goto fail;
672 }
673
dd36de4d
KS		 674 if (v[0] == '\0') {
675 /* return empty value strings as NULL */
676 free(v);
677 v = NULL;
678 }
679
97c4a07d
LP		 680 free(*value);
681 *value = v;
682
683 p += n;
ce8a6aa1
LP		 684
685 r ++;
97c4a07d
LP		 686 break;
687 }
688 va_end(ap);
689 }
690
691 if (!key)
c899f8c6 692 p += strcspn(p, separator);
97c4a07d
LP		 693 }
694
97c4a07d
LP		 695fail:
696 free(contents);
697 return r;
698}
699
8c7be95e
LP		 700int load_env_file(
701 const char *fname,
702 char ***rl) {
703
704 FILE *f;
705 char **m = 0;
706 int r;
707
708 assert(fname);
709 assert(rl);
710
711 if (!(f = fopen(fname, "re")))
712 return -errno;
713
714 while (!feof(f)) {
715 char l[LINE_MAX], *p, *u;
716 char **t;
717
718 if (!fgets(l, sizeof(l), f)) {
719 if (feof(f))
720 break;
721
722 r = -errno;
723 goto finish;
724 }
725
726 p = strstrip(l);
727
728 if (!*p)
729 continue;
730
731 if (strchr(COMMENTS, *p))
732 continue;
733
734 if (!(u = normalize_env_assignment(p))) {
735 log_error("Out of memory");
736 r = -ENOMEM;
737 goto finish;
738 }
739
740 t = strv_append(m, u);
741 free(u);
742
743 if (!t) {
744 log_error("Out of memory");
745 r = -ENOMEM;
746 goto finish;
747 }
748
749 strv_free(m);
750 m = t;
751 }
752
753 r = 0;
754
755 *rl = m;
756 m = NULL;
757
758finish:
759 if (f)
760 fclose(f);
761
762 strv_free(m);
763
764 return r;
765}
766
7072ced8
LP		 767char *truncate_nl(char *s) {
768 assert(s);
769
770 s[strcspn(s, NEWLINE)] = 0;
771 return s;
772}
773
774int get_process_name(pid_t pid, char **name) {
775 char *p;
776 int r;
777
778 assert(pid >= 1);
779 assert(name);
780
bb00e604 781 if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0)
7072ced8
LP		 782 return -ENOMEM;
783
784 r = read_one_line_file(p, name);
785 free(p);
786
787 if (r < 0)
788 return r;
789
790 truncate_nl(*name);
791 return 0;
792}
793
c59760ee
LP		 794int get_process_cmdline(pid_t pid, size_t max_length, char **line) {
795 char *p, *r, *k;
796 int c;
797 bool space = false;
798 size_t left;
799 FILE *f;
800
801 assert(pid >= 1);
802 assert(max_length > 0);
803 assert(line);
804
805 if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0)
806 return -ENOMEM;
807
808 f = fopen(p, "r");
809 free(p);
810
811 if (!f)
812 return -errno;
813
814 if (!(r = new(char, max_length))) {
815 fclose(f);
816 return -ENOMEM;
817 }
818
819 k = r;
820 left = max_length;
821 while ((c = getc(f)) != EOF) {
822
823 if (isprint(c)) {
824 if (space) {
825 if (left <= 4)
826 break;
827
828 *(k++) = ' ';
057fbb58 829 left--;
c59760ee
LP		 830 space = false;
831 }
832
833 if (left <= 4)
834 break;
835
836 *(k++) = (char) c;
057fbb58 837 left--;
c59760ee
LP		 838 } else
839 space = true;
840 }
841
842 if (left <= 4) {
843 size_t n = MIN(left-1, 3U);
844 memcpy(k, "...", n);
845 k[n] = 0;
846 } else
847 *k = 0;
848
849 fclose(f);
850
35d2e7ec
LP		 851 /* Kernel threads have no argv[] */
852 if (r[0] == 0) {
853 char *t;
854 int h;
855
856 free(r);
857
858 if ((h = get_process_name(pid, &t)) < 0)
859 return h;
860
861 h = asprintf(&r, "[%s]", t);
862 free(t);
863
864 if (h < 0)
865 return -ENOMEM;
866 }
fa776d8e 867
c59760ee
LP		 868 *line = r;
869 return 0;
870}
871
fab56fc5
LP		 872char *strnappend(const char *s, const char *suffix, size_t b) {
873 size_t a;
44d8db9e
LP		 874 char *r;
875
fab56fc5
LP		 876 if (!s && !suffix)
877 return strdup("");
878
879 if (!s)
880 return strndup(suffix, b);
881
882 if (!suffix)
883 return strdup(s);
884
44d8db9e
LP		 885 assert(s);
886 assert(suffix);
887
888 a = strlen(s);
44d8db9e
LP		 889
890 if (!(r = new(char, a+b+1)))
891 return NULL;
892
893 memcpy(r, s, a);
894 memcpy(r+a, suffix, b);
895 r[a+b] = 0;
896
897 return r;
898}
87f0e418 899
fab56fc5
LP		 900char *strappend(const char *s, const char *suffix) {
901 return strnappend(s, suffix, suffix ? strlen(suffix) : 0);
902}
903
87f0e418
LP		 904int readlink_malloc(const char *p, char **r) {
905 size_t l = 100;
906
907 assert(p);
908 assert(r);
909
910 for (;;) {
911 char *c;
912 ssize_t n;
913
914 if (!(c = new(char, l)))
915 return -ENOMEM;
916
917 if ((n = readlink(p, c, l-1)) < 0) {
918 int ret = -errno;
919 free(c);
920 return ret;
921 }
922
923 if ((size_t) n < l-1) {
924 c[n] = 0;
925 *r = c;
926 return 0;
927 }
928
929 free(c);
930 l *= 2;
931 }
932}
933
2c7108c4
LP		 934int readlink_and_make_absolute(const char *p, char **r) {
935 char *target, *k;
936 int j;
937
938 assert(p);
939 assert(r);
940
941 if ((j = readlink_malloc(p, &target)) < 0)
942 return j;
943
944 k = file_in_same_dir(p, target);
945 free(target);
946
947 if (!k)
948 return -ENOMEM;
949
950 *r = k;
951 return 0;
952}
953
35d2e7ec
LP		 954int parent_of_path(const char *path, char **_r) {
955 const char *e, *a = NULL, *b = NULL, *p;
956 char *r;
957 bool slash = false;
958
959 assert(path);
960 assert(_r);
961
962 if (!*path)
963 return -EINVAL;
964
965 for (e = path; *e; e++) {
966
967 if (!slash && *e == '/') {
968 a = b;
969 b = e;
970 slash = true;
971 } else if (slash && *e != '/')
972 slash = false;
973 }
974
975 if (*(e-1) == '/')
976 p = a;
977 else
978 p = b;
979
980 if (!p)
981 return -EINVAL;
982
983 if (p == path)
984 r = strdup("/");
985 else
986 r = strndup(path, p-path);
987
988 if (!r)
989 return -ENOMEM;
990
991 *_r = r;
992 return 0;
993}
994
995
87f0e418
LP		 996char *file_name_from_path(const char *p) {
997 char *r;
998
999 assert(p);
1000
1001 if ((r = strrchr(p, '/')))
1002 return r + 1;
1003
1004 return (char*) p;
1005}
0301abf4
LP		 1006
1007bool path_is_absolute(const char *p) {
1008 assert(p);
1009
1010 return p[0] == '/';
1011}
1012
1013bool is_path(const char *p) {
1014
1015 return !!strchr(p, '/');
1016}
1017
1018char *path_make_absolute(const char *p, const char *prefix) {
1019 char *r;
1020
1021 assert(p);
1022
65d2ebdc
LP		 1023 /* Makes every item in the list an absolute path by prepending
1024 * the prefix, if specified and necessary */
1025
0301abf4
LP		 1026 if (path_is_absolute(p) || !prefix)
1027 return strdup(p);
1028
1029 if (asprintf(&r, "%s/%s", prefix, p) < 0)
1030 return NULL;
1031
1032 return r;
1033}
2a987ee8 1034
65d2ebdc
LP		 1035char *path_make_absolute_cwd(const char *p) {
1036 char *cwd, *r;
1037
1038 assert(p);
1039
1040 /* Similar to path_make_absolute(), but prefixes with the
1041 * current working directory. */
1042
1043 if (path_is_absolute(p))
1044 return strdup(p);
1045
1046 if (!(cwd = get_current_dir_name()))
1047 return NULL;
1048
1049 r = path_make_absolute(p, cwd);
1050 free(cwd);
1051
1052 return r;
1053}
1054
1055char **strv_path_make_absolute_cwd(char **l) {
1056 char **s;
1057
1058 /* Goes through every item in the string list and makes it
1059 * absolute. This works in place and won't rollback any
1060 * changes on failure. */
1061
1062 STRV_FOREACH(s, l) {
1063 char *t;
1064
1065 if (!(t = path_make_absolute_cwd(*s)))
1066 return NULL;
1067
1068 free(*s);
1069 *s = t;
1070 }
1071
1072 return l;
1073}
1074
c3f6d675
LP		 1075char **strv_path_canonicalize(char **l) {
1076 char **s;
1077 unsigned k = 0;
1078 bool enomem = false;
1079
1080 if (strv_isempty(l))
1081 return l;
1082
1083 /* Goes through every item in the string list and canonicalize
1084 * the path. This works in place and won't rollback any
1085 * changes on failure. */
1086
1087 STRV_FOREACH(s, l) {
1088 char *t, *u;
1089
1090 t = path_make_absolute_cwd(*s);
1091 free(*s);
1092
1093 if (!t) {
1094 enomem = true;
1095 continue;
1096 }
1097
1098 errno = 0;
1099 u = canonicalize_file_name(t);
1100 free(t);
1101
1102 if (!u) {
1103 if (errno == ENOMEM || !errno)
1104 enomem = true;
1105
1106 continue;
1107 }
1108
1109 l[k++] = u;
1110 }
1111
1112 l[k] = NULL;
1113
1114 if (enomem)
1115 return NULL;
1116
1117 return l;
1118}
1119
2a987ee8
LP		 1120int reset_all_signal_handlers(void) {
1121 int sig;
1122
1123 for (sig = 1; sig < _NSIG; sig++) {
1124 struct sigaction sa;
1125
1126 if (sig == SIGKILL || sig == SIGSTOP)
1127 continue;
1128
1129 zero(sa);
1130 sa.sa_handler = SIG_DFL;
431c32bf 1131 sa.sa_flags = SA_RESTART;
2a987ee8
LP		 1132
1133 /* On Linux the first two RT signals are reserved by
1134 * glibc, and sigaction() will return EINVAL for them. */
1135 if ((sigaction(sig, &sa, NULL) < 0))
1136 if (errno != EINVAL)
1137 return -errno;
1138 }
1139
8e274523 1140 return 0;
2a987ee8 1141}
4a72ff34
LP		 1142
1143char *strstrip(char *s) {
1144 char *e, *l = NULL;
1145
1146 /* Drops trailing whitespace. Modifies the string in
1147 * place. Returns pointer to first non-space character */
1148
1149 s += strspn(s, WHITESPACE);
1150
1151 for (e = s; *e; e++)
1152 if (!strchr(WHITESPACE, *e))
1153 l = e;
1154
1155 if (l)
1156 *(l+1) = 0;
1157 else
1158 *s = 0;
1159
1160 return s;
4a72ff34
LP		 1161}
1162
ee9b5e01
LP		 1163char *delete_chars(char *s, const char *bad) {
1164 char *f, *t;
1165
1166 /* Drops all whitespace, regardless where in the string */
1167
1168 for (f = s, t = s; *f; f++) {
1169 if (strchr(bad, *f))
1170 continue;
1171
1172 *(t++) = *f;
1173 }
1174
1175 *t = 0;
1176
1177 return s;
1178}
1179
4a72ff34
LP		 1180char *file_in_same_dir(const char *path, const char *filename) {
1181 char *e, *r;
1182 size_t k;
1183
1184 assert(path);
1185 assert(filename);
1186
1187 /* This removes the last component of path and appends
1188 * filename, unless the latter is absolute anyway or the
1189 * former isn't */
1190
1191 if (path_is_absolute(filename))
1192 return strdup(filename);
1193
1194 if (!(e = strrchr(path, '/')))
1195 return strdup(filename);
1196
1197 k = strlen(filename);
1198 if (!(r = new(char, e-path+1+k+1)))
1199 return NULL;
1200
1201 memcpy(r, path, e-path+1);
1202 memcpy(r+(e-path)+1, filename, k+1);
1203
1204 return r;
1205}
fb624d04 1206
8c6db833
LP		 1207int safe_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) {
1208 struct stat st;
1209
56cf987f 1210 if (label_mkdir(path, mode) >= 0)
8c6db833
LP		 1211 if (chmod_and_chown(path, mode, uid, gid) < 0)
1212 return -errno;
1213
1214 if (lstat(path, &st) < 0)
1215 return -errno;
1216
1217 if ((st.st_mode & 0777) != mode ||
1218 st.st_uid != uid ||
1219 st.st_gid != gid ||
1220 !S_ISDIR(st.st_mode)) {
1221 errno = EEXIST;
1222 return -errno;
1223 }
1224
1225 return 0;
1226}
1227
1228
a9f5d454
LP		 1229int mkdir_parents(const char *path, mode_t mode) {
1230 const char *p, *e;
1231
1232 assert(path);
1233
1234 /* Creates every parent directory in the path except the last
1235 * component. */
1236
1237 p = path + strspn(path, "/");
1238 for (;;) {
1239 int r;
1240 char *t;
1241
1242 e = p + strcspn(p, "/");
1243 p = e + strspn(e, "/");
1244
1245 /* Is this the last component? If so, then we're
1246 * done */
1247 if (*p == 0)
1248 return 0;
1249
1250 if (!(t = strndup(path, e - path)))
1251 return -ENOMEM;
1252
56cf987f 1253 r = label_mkdir(t, mode);
a9f5d454
LP		 1254 free(t);
1255
1256 if (r < 0 && errno != EEXIST)
1257 return -errno;
1258 }
1259}
1260
bbd67135
LP		 1261int mkdir_p(const char *path, mode_t mode) {
1262 int r;
1263
1264 /* Like mkdir -p */
1265
1266 if ((r = mkdir_parents(path, mode)) < 0)
1267 return r;
1268
56cf987f 1269 if (label_mkdir(path, mode) < 0 && errno != EEXIST)
bbd67135
LP		 1270 return -errno;
1271
1272 return 0;
1273}
1274
c32dd69b
LP		 1275int rmdir_parents(const char *path, const char *stop) {
1276 size_t l;
1277 int r = 0;
1278
1279 assert(path);
1280 assert(stop);
1281
1282 l = strlen(path);
1283
1284 /* Skip trailing slashes */
1285 while (l > 0 && path[l-1] == '/')
1286 l--;
1287
1288 while (l > 0) {
1289 char *t;
1290
1291 /* Skip last component */
1292 while (l > 0 && path[l-1] != '/')
1293 l--;
1294
1295 /* Skip trailing slashes */
1296 while (l > 0 && path[l-1] == '/')
1297 l--;
1298
1299 if (l <= 0)
1300 break;
1301
1302 if (!(t = strndup(path, l)))
1303 return -ENOMEM;
1304
1305 if (path_startswith(stop, t)) {
1306 free(t);
1307 return 0;
1308 }
1309
1310 r = rmdir(t);
1311 free(t);
1312
1313 if (r < 0)
1314 if (errno != ENOENT)
1315 return -errno;
1316 }
1317
1318 return 0;
1319}
1320
1321
fb624d04
LP		 1322char hexchar(int x) {
1323 static const char table[16] = "0123456789abcdef";
1324
1325 return table[x & 15];
1326}
4fe88d28
LP		 1327
1328int unhexchar(char c) {
1329
1330 if (c >= '0' && c <= '9')
1331 return c - '0';
1332
1333 if (c >= 'a' && c <= 'f')
ea430986 1334 return c - 'a' + 10;
4fe88d28
LP		 1335
1336 if (c >= 'A' && c <= 'F')
ea430986 1337 return c - 'A' + 10;
4fe88d28
LP		 1338
1339 return -1;
1340}
1341
1342char octchar(int x) {
1343 return '0' + (x & 7);
1344}
1345
1346int unoctchar(char c) {
1347
1348 if (c >= '0' && c <= '7')
1349 return c - '0';
1350
1351 return -1;
1352}
1353
5af98f82
LP		 1354char decchar(int x) {
1355 return '0' + (x % 10);
1356}
1357
1358int undecchar(char c) {
1359
1360 if (c >= '0' && c <= '9')
1361 return c - '0';
1362
1363 return -1;
1364}
1365
4fe88d28
LP		 1366char *cescape(const char *s) {
1367 char *r, *t;
1368 const char *f;
1369
1370 assert(s);
1371
1372 /* Does C style string escaping. */
1373
1374 if (!(r = new(char, strlen(s)*4 + 1)))
1375 return NULL;
1376
1377 for (f = s, t = r; *f; f++)
1378
1379 switch (*f) {
1380
1381 case '\a':
1382 *(t++) = '\\';
1383 *(t++) = 'a';
1384 break;
1385 case '\b':
1386 *(t++) = '\\';
1387 *(t++) = 'b';
1388 break;
1389 case '\f':
1390 *(t++) = '\\';
1391 *(t++) = 'f';
1392 break;
1393 case '\n':
1394 *(t++) = '\\';
1395 *(t++) = 'n';
1396 break;
1397 case '\r':
1398 *(t++) = '\\';
1399 *(t++) = 'r';
1400 break;
1401 case '\t':
1402 *(t++) = '\\';
1403 *(t++) = 't';
1404 break;
1405 case '\v':
1406 *(t++) = '\\';
1407 *(t++) = 'v';
1408 break;
1409 case '\\':
1410 *(t++) = '\\';
1411 *(t++) = '\\';
1412 break;
1413 case '"':
1414 *(t++) = '\\';
1415 *(t++) = '"';
1416 break;
1417 case '\'':
1418 *(t++) = '\\';
1419 *(t++) = '\'';
1420 break;
1421
1422 default:
1423 /* For special chars we prefer octal over
1424 * hexadecimal encoding, simply because glib's
1425 * g_strescape() does the same */
1426 if ((*f < ' ') || (*f >= 127)) {
1427 *(t++) = '\\';
1428 *(t++) = octchar((unsigned char) *f >> 6);
1429 *(t++) = octchar((unsigned char) *f >> 3);
1430 *(t++) = octchar((unsigned char) *f);
1431 } else
1432 *(t++) = *f;
1433 break;
1434 }
1435
1436 *t = 0;
1437
1438 return r;
1439}
1440
6febfd0d 1441char *cunescape_length(const char *s, size_t length) {
4fe88d28
LP		 1442 char *r, *t;
1443 const char *f;
1444
1445 assert(s);
1446
1447 /* Undoes C style string escaping */
1448
6febfd0d 1449 if (!(r = new(char, length+1)))
4fe88d28
LP		 1450 return r;
1451
6febfd0d 1452 for (f = s, t = r; f < s + length; f++) {
4fe88d28
LP		 1453
1454 if (*f != '\\') {
1455 *(t++) = *f;
1456 continue;
1457 }
1458
1459 f++;
1460
1461 switch (*f) {
1462
1463 case 'a':
1464 *(t++) = '\a';
1465 break;
1466 case 'b':
1467 *(t++) = '\b';
1468 break;
1469 case 'f':
1470 *(t++) = '\f';
1471 break;
1472 case 'n':
1473 *(t++) = '\n';
1474 break;
1475 case 'r':
1476 *(t++) = '\r';
1477 break;
1478 case 't':
1479 *(t++) = '\t';
1480 break;
1481 case 'v':
1482 *(t++) = '\v';
1483 break;
1484 case '\\':
1485 *(t++) = '\\';
1486 break;
1487 case '"':
1488 *(t++) = '"';
1489 break;
1490 case '\'':
1491 *(t++) = '\'';
1492 break;
1493
e167fb86
LP		 1494 case 's':
1495 /* This is an extension of the XDG syntax files */
1496 *(t++) = ' ';
1497 break;
1498
4fe88d28
LP		 1499 case 'x': {
1500 /* hexadecimal encoding */
1501 int a, b;
1502
1503 if ((a = unhexchar(f[1])) < 0 ||
1504 (b = unhexchar(f[2])) < 0) {
1505 /* Invalid escape code, let's take it literal then */
1506 *(t++) = '\\';
1507 *(t++) = 'x';
1508 } else {
1509 *(t++) = (char) ((a << 4) | b);
1510 f += 2;
1511 }
1512
1513 break;
1514 }
1515
1516 case '0':
1517 case '1':
1518 case '2':
1519 case '3':
1520 case '4':
1521 case '5':
1522 case '6':
1523 case '7': {
1524 /* octal encoding */
1525 int a, b, c;
1526
1527 if ((a = unoctchar(f[0])) < 0 ||
1528 (b = unoctchar(f[1])) < 0 ||
1529 (c = unoctchar(f[2])) < 0) {
1530 /* Invalid escape code, let's take it literal then */
1531 *(t++) = '\\';
1532 *(t++) = f[0];
1533 } else {
1534 *(t++) = (char) ((a << 6) | (b << 3) | c);
1535 f += 2;
1536 }
1537
1538 break;
1539 }
1540
1541 case 0:
1542 /* premature end of string.*/
1543 *(t++) = '\\';
1544 goto finish;
1545
1546 default:
1547 /* Invalid escape code, let's take it literal then */
1548 *(t++) = '\\';
f3d4cc01 1549 *(t++) = *f;
4fe88d28
LP		 1550 break;
1551 }
1552 }
1553
1554finish:
1555 *t = 0;
1556 return r;
1557}
1558
6febfd0d
LP		 1559char *cunescape(const char *s) {
1560 return cunescape_length(s, strlen(s));
1561}
4fe88d28
LP		 1562
1563char *xescape(const char *s, const char *bad) {
1564 char *r, *t;
1565 const char *f;
1566
1567 /* Escapes all chars in bad, in addition to \ and all special
1568 * chars, in \xFF style escaping. May be reversed with
1569 * cunescape. */
1570
1571 if (!(r = new(char, strlen(s)*4+1)))
1572 return NULL;
1573
1574 for (f = s, t = r; *f; f++) {
1575
b866264a
LP		 1576 if ((*f < ' ') || (*f >= 127) ||
1577 (*f == '\\') || strchr(bad, *f)) {
4fe88d28
LP		 1578 *(t++) = '\\';
1579 *(t++) = 'x';
1580 *(t++) = hexchar(*f >> 4);
1581 *(t++) = hexchar(*f);
1582 } else
1583 *(t++) = *f;
1584 }
1585
1586 *t = 0;
1587
1588 return r;
1589}
1590
ea430986 1591char *bus_path_escape(const char *s) {
ea430986
LP		 1592 char *r, *t;
1593 const char *f;
1594
47be870b
LP		 1595 assert(s);
1596
ea430986
LP		 1597 /* Escapes all chars that D-Bus' object path cannot deal
1598 * with. Can be reverse with bus_path_unescape() */
1599
1600 if (!(r = new(char, strlen(s)*3+1)))
1601 return NULL;
1602
1603 for (f = s, t = r; *f; f++) {
1604
1605 if (!(*f >= 'A' && *f <= 'Z') &&
1606 !(*f >= 'a' && *f <= 'z') &&
1607 !(*f >= '0' && *f <= '9')) {
1608 *(t++) = '_';
1609 *(t++) = hexchar(*f >> 4);
1610 *(t++) = hexchar(*f);
1611 } else
1612 *(t++) = *f;
1613 }
1614
1615 *t = 0;
1616
1617 return r;
1618}
1619
9e2f7c11 1620char *bus_path_unescape(const char *f) {
ea430986 1621 char *r, *t;
ea430986 1622
9e2f7c11 1623 assert(f);
47be870b 1624
9e2f7c11 1625 if (!(r = strdup(f)))
ea430986
LP		 1626 return NULL;
1627
9e2f7c11 1628 for (t = r; *f; f++) {
ea430986
LP		 1629
1630 if (*f == '_') {
1631 int a, b;
1632
1633 if ((a = unhexchar(f[1])) < 0 ||
1634 (b = unhexchar(f[2])) < 0) {
1635 /* Invalid escape code, let's take it literal then */
1636 *(t++) = '_';
1637 } else {
1638 *(t++) = (char) ((a << 4) | b);
1639 f += 2;
1640 }
1641 } else
1642 *(t++) = *f;
1643 }
1644
1645 *t = 0;
1646
1647 return r;
1648}
1649
4fe88d28
LP		 1650char *path_kill_slashes(char *path) {
1651 char *f, *t;
1652 bool slash = false;
1653
1654 /* Removes redundant inner and trailing slashes. Modifies the
1655 * passed string in-place.
1656 *
1657 * ///foo///bar/ becomes /foo/bar
1658 */
1659
1660 for (f = path, t = path; *f; f++) {
1661
1662 if (*f == '/') {
1663 slash = true;
1664 continue;
1665 }
1666
1667 if (slash) {
1668 slash = false;
1669 *(t++) = '/';
1670 }
1671
1672 *(t++) = *f;
1673 }
1674
1675 /* Special rule, if we are talking of the root directory, a
1676 trailing slash is good */
1677
1678 if (t == path && slash)
1679 *(t++) = '/';
1680
1681 *t = 0;
1682 return path;
1683}
1684
1685bool path_startswith(const char *path, const char *prefix) {
1686 assert(path);
1687 assert(prefix);
1688
1689 if ((path[0] == '/') != (prefix[0] == '/'))
1690 return false;
1691
1692 for (;;) {
1693 size_t a, b;
1694
1695 path += strspn(path, "/");
1696 prefix += strspn(prefix, "/");
1697
1698 if (*prefix == 0)
1699 return true;
1700
1701 if (*path == 0)
1702 return false;
1703
1704 a = strcspn(path, "/");
1705 b = strcspn(prefix, "/");
1706
1707 if (a != b)
1708 return false;
1709
1710 if (memcmp(path, prefix, a) != 0)
1711 return false;
1712
1713 path += a;
1714 prefix += b;
1715 }
1716}
1717
15ae422b
LP		 1718bool path_equal(const char *a, const char *b) {
1719 assert(a);
1720 assert(b);
1721
1722 if ((a[0] == '/') != (b[0] == '/'))
1723 return false;
1724
1725 for (;;) {
1726 size_t j, k;
1727
1728 a += strspn(a, "/");
1729 b += strspn(b, "/");
1730
1731 if (*a == 0 && *b == 0)
1732 return true;
1733
1734 if (*a == 0 || *b == 0)
1735 return false;
1736
1737 j = strcspn(a, "/");
1738 k = strcspn(b, "/");
1739
1740 if (j != k)
1741 return false;
1742
1743 if (memcmp(a, b, j) != 0)
1744 return false;
1745
1746 a += j;
1747 b += k;
1748 }
1749}
1750
67d51650 1751char *ascii_strlower(char *t) {
4fe88d28
LP		 1752 char *p;
1753
67d51650 1754 assert(t);
4fe88d28 1755
67d51650 1756 for (p = t; *p; p++)
4fe88d28
LP		 1757 if (*p >= 'A' && *p <= 'Z')
1758 *p = *p - 'A' + 'a';
1759
67d51650 1760 return t;
4fe88d28 1761}
1dccbe19 1762
c85dc17b
LP		 1763bool ignore_file(const char *filename) {
1764 assert(filename);
1765
1766 return
1767 filename[0] == '.' ||
6c78be3c 1768 streq(filename, "lost+found") ||
e472d476
LP		 1769 streq(filename, "aquota.user") ||
1770 streq(filename, "aquota.group") ||
c85dc17b
LP		 1771 endswith(filename, "~") ||
1772 endswith(filename, ".rpmnew") ||
1773 endswith(filename, ".rpmsave") ||
1774 endswith(filename, ".rpmorig") ||
1775 endswith(filename, ".dpkg-old") ||
1776 endswith(filename, ".dpkg-new") ||
1777 endswith(filename, ".swp");
1778}
1779
3a0ecb08
LP		 1780int fd_nonblock(int fd, bool nonblock) {
1781 int flags;
1782
1783 assert(fd >= 0);
1784
1785 if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
1786 return -errno;
1787
1788 if (nonblock)
1789 flags |= O_NONBLOCK;
1790 else
1791 flags &= ~O_NONBLOCK;
1792
1793 if (fcntl(fd, F_SETFL, flags) < 0)
1794 return -errno;
1795
1796 return 0;
1797}
1798
1799int fd_cloexec(int fd, bool cloexec) {
1800 int flags;
1801
1802 assert(fd >= 0);
1803
1804 if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
1805 return -errno;
1806
1807 if (cloexec)
1808 flags |= FD_CLOEXEC;
1809 else
1810 flags &= ~FD_CLOEXEC;
1811
1812 if (fcntl(fd, F_SETFD, flags) < 0)
1813 return -errno;
1814
1815 return 0;
1816}
1817
a0d40ac5
LP		 1818int close_all_fds(const int except[], unsigned n_except) {
1819 DIR *d;
1820 struct dirent *de;
1821 int r = 0;
1822
1823 if (!(d = opendir("/proc/self/fd")))
1824 return -errno;
1825
1826 while ((de = readdir(d))) {
a7610064 1827 int fd = -1;
a0d40ac5 1828
a16e1123 1829 if (ignore_file(de->d_name))
a0d40ac5
LP		 1830 continue;
1831
720ce21d
LP		 1832 if (safe_atoi(de->d_name, &fd) < 0)
1833 /* Let's better ignore this, just in case */
1834 continue;
a0d40ac5
LP		 1835
1836 if (fd < 3)
1837 continue;
1838
1839 if (fd == dirfd(d))
1840 continue;
1841
1842 if (except) {
1843 bool found;
1844 unsigned i;
1845
1846 found = false;
1847 for (i = 0; i < n_except; i++)
1848 if (except[i] == fd) {
1849 found = true;
1850 break;
1851 }
1852
1853 if (found)
1854 continue;
1855 }
1856
720ce21d 1857 if (close_nointr(fd) < 0) {
2f357920 1858 /* Valgrind has its own FD and doesn't want to have it closed */
720ce21d
LP		 1859 if (errno != EBADF && r == 0)
1860 r = -errno;
2f357920 1861 }
a0d40ac5
LP		 1862 }
1863
a0d40ac5
LP		 1864 closedir(d);
1865 return r;
1866}
1867
db12775d
LP		 1868bool chars_intersect(const char *a, const char *b) {
1869 const char *p;
1870
1871 /* Returns true if any of the chars in a are in b. */
1872 for (p = a; *p; p++)
1873 if (strchr(b, *p))
1874 return true;
1875
1876 return false;
1877}
1878
8b6c7120
LP		 1879char *format_timestamp(char *buf, size_t l, usec_t t) {
1880 struct tm tm;
1881 time_t sec;
1882
1883 assert(buf);
1884 assert(l > 0);
1885
1886 if (t <= 0)
1887 return NULL;
1888
f872ec33 1889 sec = (time_t) (t / USEC_PER_SEC);
8b6c7120
LP		 1890
1891 if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
1892 return NULL;
1893
1894 return buf;
1895}
1896
584be568
LP		 1897char *format_timestamp_pretty(char *buf, size_t l, usec_t t) {
1898 usec_t n, d;
1899
1900 n = now(CLOCK_REALTIME);
1901
1902 if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t)
1903 return NULL;
1904
1905 d = n - t;
1906
1907 if (d >= USEC_PER_YEAR)
1908 snprintf(buf, l, "%llu years and %llu months ago",
1909 (unsigned long long) (d / USEC_PER_YEAR),
1910 (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH));
1911 else if (d >= USEC_PER_MONTH)
1912 snprintf(buf, l, "%llu months and %llu days ago",
1913 (unsigned long long) (d / USEC_PER_MONTH),
1914 (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY));
1915 else if (d >= USEC_PER_WEEK)
1916 snprintf(buf, l, "%llu weeks and %llu days ago",
1917 (unsigned long long) (d / USEC_PER_WEEK),
1918 (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY));
1919 else if (d >= 2*USEC_PER_DAY)
1920 snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY));
1921 else if (d >= 25*USEC_PER_HOUR)
1922 snprintf(buf, l, "1 day and %lluh ago",
1923 (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR));
1924 else if (d >= 6*USEC_PER_HOUR)
1925 snprintf(buf, l, "%lluh ago",
1926 (unsigned long long) (d / USEC_PER_HOUR));
1927 else if (d >= USEC_PER_HOUR)
1928 snprintf(buf, l, "%lluh %llumin ago",
1929 (unsigned long long) (d / USEC_PER_HOUR),
1930 (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE));
1931 else if (d >= 5*USEC_PER_MINUTE)
1932 snprintf(buf, l, "%llumin ago",
1933 (unsigned long long) (d / USEC_PER_MINUTE));
1934 else if (d >= USEC_PER_MINUTE)
1935 snprintf(buf, l, "%llumin %llus ago",
1936 (unsigned long long) (d / USEC_PER_MINUTE),
1937 (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC));
1938 else if (d >= USEC_PER_SEC)
1939 snprintf(buf, l, "%llus ago",
1940 (unsigned long long) (d / USEC_PER_SEC));
1941 else if (d >= USEC_PER_MSEC)
1942 snprintf(buf, l, "%llums ago",
1943 (unsigned long long) (d / USEC_PER_MSEC));
1944 else if (d > 0)
1945 snprintf(buf, l, "%lluus ago",
1946 (unsigned long long) d);
1947 else
1948 snprintf(buf, l, "now");
1949
1950 buf[l-1] = 0;
1951 return buf;
1952}
1953
871d7de4
LP		 1954char *format_timespan(char *buf, size_t l, usec_t t) {
1955 static const struct {
1956 const char *suffix;
1957 usec_t usec;
1958 } table[] = {
1959 { "w", USEC_PER_WEEK },
1960 { "d", USEC_PER_DAY },
1961 { "h", USEC_PER_HOUR },
1962 { "min", USEC_PER_MINUTE },
1963 { "s", USEC_PER_SEC },
1964 { "ms", USEC_PER_MSEC },
1965 { "us", 1 },
1966 };
1967
1968 unsigned i;
1969 char *p = buf;
1970
1971 assert(buf);
1972 assert(l > 0);
1973
1974 if (t == (usec_t) -1)
1975 return NULL;
1976
4502d22c
LP		 1977 if (t == 0) {
1978 snprintf(p, l, "0");
1979 p[l-1] = 0;
1980 return p;
1981 }
1982
871d7de4
LP		 1983 /* The result of this function can be parsed with parse_usec */
1984
1985 for (i = 0; i < ELEMENTSOF(table); i++) {
1986 int k;
1987 size_t n;
1988
1989 if (t < table[i].usec)
1990 continue;
1991
1992 if (l <= 1)
1993 break;
1994
1995 k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix);
1996 n = MIN((size_t) k, l);
1997
1998 l -= n;
1999 p += n;
2000
2001 t %= table[i].usec;
2002 }
2003
2004 *p = 0;
2005
2006 return buf;
2007}
2008
42856c10
LP		 2009bool fstype_is_network(const char *fstype) {
2010 static const char * const table[] = {
2011 "cifs",
2012 "smbfs",
2013 "ncpfs",
2014 "nfs",
ca139f94
LP		 2015 "nfs4",
2016 "gfs",
2017 "gfs2"
42856c10
LP		 2018 };
2019
2020 unsigned i;
2021
2022 for (i = 0; i < ELEMENTSOF(table); i++)
2023 if (streq(table[i], fstype))
2024 return true;
2025
2026 return false;
2027}
2028
601f6a1e
LP		 2029int chvt(int vt) {
2030 int fd, r = 0;
2031
2032 if ((fd = open("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
2033 return -errno;
2034
2035 if (vt < 0) {
2036 int tiocl[2] = {
2037 TIOCL_GETKMSGREDIRECT,
2038 0
2039 };
2040
2041 if (ioctl(fd, TIOCLINUX, tiocl) < 0)
2042 return -errno;
2043
2044 vt = tiocl[0] <= 0 ? 1 : tiocl[0];
2045 }
2046
2047 if (ioctl(fd, VT_ACTIVATE, vt) < 0)
2048 r = -errno;
2049
a16e1123 2050 close_nointr_nofail(r);
601f6a1e
LP		 2051 return r;
2052}
2053
80876c20
LP		 2054int read_one_char(FILE *f, char *ret, bool *need_nl) {
2055 struct termios old_termios, new_termios;
2056 char c;
2057 char line[1024];
2058
2059 assert(f);
2060 assert(ret);
2061
2062 if (tcgetattr(fileno(f), &old_termios) >= 0) {
2063 new_termios = old_termios;
2064
2065 new_termios.c_lflag &= ~ICANON;
2066 new_termios.c_cc[VMIN] = 1;
2067 new_termios.c_cc[VTIME] = 0;
2068
2069 if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
2070 size_t k;
2071
2072 k = fread(&c, 1, 1, f);
2073
2074 tcsetattr(fileno(f), TCSADRAIN, &old_termios);
2075
2076 if (k <= 0)
2077 return -EIO;
2078
2079 if (need_nl)
2080 *need_nl = c != '\n';
2081
2082 *ret = c;
2083 return 0;
2084 }
2085 }
2086
2087 if (!(fgets(line, sizeof(line), f)))
2088 return -EIO;
2089
2090 truncate_nl(line);
2091
2092 if (strlen(line) != 1)
2093 return -EBADMSG;
2094
2095 if (need_nl)
2096 *need_nl = false;
2097
2098 *ret = line[0];
2099 return 0;
2100}
2101
2102int ask(char *ret, const char *replies, const char *text, ...) {
1b39d4b9
LP		 2103 bool on_tty;
2104
80876c20
LP		 2105 assert(ret);
2106 assert(replies);
2107 assert(text);
2108
1b39d4b9
LP		 2109 on_tty = isatty(STDOUT_FILENO);
2110
80876c20
LP		 2111 for (;;) {
2112 va_list ap;
2113 char c;
2114 int r;
2115 bool need_nl = true;
2116
1b39d4b9
LP		 2117 if (on_tty)
2118 fputs("\x1B[1m", stdout);
b1b2dc0c 2119
80876c20
LP		 2120 va_start(ap, text);
2121 vprintf(text, ap);
2122 va_end(ap);
2123
1b39d4b9
LP		 2124 if (on_tty)
2125 fputs("\x1B[0m", stdout);
b1b2dc0c 2126
80876c20
LP		 2127 fflush(stdout);
2128
2129 if ((r = read_one_char(stdin, &c, &need_nl)) < 0) {
2130
2131 if (r == -EBADMSG) {
2132 puts("Bad input, please try again.");
2133 continue;
2134 }
2135
2136 putchar('\n');
2137 return r;
2138 }
2139
2140 if (need_nl)
2141 putchar('\n');
2142
2143 if (strchr(replies, c)) {
2144 *ret = c;
2145 return 0;
2146 }
2147
2148 puts("Read unexpected character, please try again.");
2149 }
2150}
2151
2152int reset_terminal(int fd) {
2153 struct termios termios;
2154 int r = 0;
3fe5e5d4
LP		 2155 long arg;
2156
2157 /* Set terminal to some sane defaults */
80876c20
LP		 2158
2159 assert(fd >= 0);
2160
eed1d0e3
LP		 2161 /* We leave locked terminal attributes untouched, so that
2162 * Plymouth may set whatever it wants to set, and we don't
2163 * interfere with that. */
3fe5e5d4
LP		 2164
2165 /* Disable exclusive mode, just in case */
2166 ioctl(fd, TIOCNXCL);
2167
2168 /* Enable console unicode mode */
2169 arg = K_UNICODE;
2170 ioctl(fd, KDSKBMODE, &arg);
80876c20
LP		 2171
2172 if (tcgetattr(fd, &termios) < 0) {
2173 r = -errno;
2174 goto finish;
2175 }
2176
aaf694ca
LP		 2177 /* We only reset the stuff that matters to the software. How
2178 * hardware is set up we don't touch assuming that somebody
2179 * else will do that for us */
2180
2181 termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
80876c20
LP		 2182 termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
2183 termios.c_oflag |= ONLCR;
2184 termios.c_cflag |= CREAD;
2185 termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
2186
2187 termios.c_cc[VINTR] = 03; /* ^C */
2188 termios.c_cc[VQUIT] = 034; /* ^\ */
2189 termios.c_cc[VERASE] = 0177;
2190 termios.c_cc[VKILL] = 025; /* ^X */
2191 termios.c_cc[VEOF] = 04; /* ^D */
2192 termios.c_cc[VSTART] = 021; /* ^Q */
2193 termios.c_cc[VSTOP] = 023; /* ^S */
2194 termios.c_cc[VSUSP] = 032; /* ^Z */
2195 termios.c_cc[VLNEXT] = 026; /* ^V */
2196 termios.c_cc[VWERASE] = 027; /* ^W */
2197 termios.c_cc[VREPRINT] = 022; /* ^R */
aaf694ca
LP		 2198 termios.c_cc[VEOL] = 0;
2199 termios.c_cc[VEOL2] = 0;
80876c20
LP		 2200
2201 termios.c_cc[VTIME] = 0;
2202 termios.c_cc[VMIN] = 1;
2203
2204 if (tcsetattr(fd, TCSANOW, &termios) < 0)
2205 r = -errno;
2206
2207finish:
2208 /* Just in case, flush all crap out */
2209 tcflush(fd, TCIOFLUSH);
2210
2211 return r;
2212}
2213
2214int open_terminal(const char *name, int mode) {
2215 int fd, r;
f73f76ac 2216 unsigned c = 0;
80876c20 2217
f73f76ac
LP		 2218 /*
2219 * If a TTY is in the process of being closed opening it might
2220 * cause EIO. This is horribly awful, but unlikely to be
2221 * changed in the kernel. Hence we work around this problem by
2222 * retrying a couple of times.
2223 *
2224 * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245
2225 */
2226
2227 for (;;) {
2228 if ((fd = open(name, mode)) >= 0)
2229 break;
2230
2231 if (errno != EIO)
2232 return -errno;
2233
2234 if (c >= 20)
2235 return -errno;
2236
2237 usleep(50 * USEC_PER_MSEC);
2238 c++;
2239 }
2240
2241 if (fd < 0)
80876c20
LP		 2242 return -errno;
2243
2244 if ((r = isatty(fd)) < 0) {
2245 close_nointr_nofail(fd);
2246 return -errno;
2247 }
2248
2249 if (!r) {
2250 close_nointr_nofail(fd);
2251 return -ENOTTY;
2252 }
2253
2254 return fd;
2255}
2256
2257int flush_fd(int fd) {
2258 struct pollfd pollfd;
2259
2260 zero(pollfd);
2261 pollfd.fd = fd;
2262 pollfd.events = POLLIN;
2263
2264 for (;;) {
2265 char buf[1024];
2266 ssize_t l;
2267 int r;
2268
2269 if ((r = poll(&pollfd, 1, 0)) < 0) {
2270
2271 if (errno == EINTR)
2272 continue;
2273
2274 return -errno;
2275 }
2276
2277 if (r == 0)
2278 return 0;
2279
2280 if ((l = read(fd, buf, sizeof(buf))) < 0) {
2281
2282 if (errno == EINTR)
2283 continue;
2284
2285 if (errno == EAGAIN)
2286 return 0;
2287
2288 return -errno;
2289 }
2290
2291 if (l <= 0)
2292 return 0;
2293 }
2294}
2295
21de3988 2296int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm) {
bab45044 2297 int fd = -1, notify = -1, r, wd = -1;
80876c20
LP		 2298
2299 assert(name);
2300
2301 /* We use inotify to be notified when the tty is closed. We
2302 * create the watch before checking if we can actually acquire
2303 * it, so that we don't lose any event.
2304 *
2305 * Note: strictly speaking this actually watches for the
2306 * device being closed, it does *not* really watch whether a
2307 * tty loses its controlling process. However, unless some
2308 * rogue process uses TIOCNOTTY on /dev/tty *after* closing
2309 * its tty otherwise this will not become a problem. As long
2310 * as the administrator makes sure not configure any service
2311 * on the same tty as an untrusted user this should not be a
2312 * problem. (Which he probably should not do anyway.) */
2313
2314 if (!fail && !force) {
2315 if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
2316 r = -errno;
2317 goto fail;
2318 }
2319
2320 if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) {
2321 r = -errno;
2322 goto fail;
2323 }
2324 }
2325
2326 for (;;) {
e3d1855b
LP		 2327 if (notify >= 0)
2328 if ((r = flush_fd(notify)) < 0)
2329 goto fail;
80876c20
LP		 2330
2331 /* We pass here O_NOCTTY only so that we can check the return
2332 * value TIOCSCTTY and have a reliable way to figure out if we
2333 * successfully became the controlling process of the tty */
2334 if ((fd = open_terminal(name, O_RDWR|O_NOCTTY)) < 0)
2335 return -errno;
2336
2337 /* First, try to get the tty */
21de3988
LP		 2338 r = ioctl(fd, TIOCSCTTY, force);
2339
2340 /* Sometimes it makes sense to ignore TIOCSCTTY
2341 * returning EPERM, i.e. when very likely we already
2342 * are have this controlling terminal. */
2343 if (r < 0 && errno == EPERM && ignore_tiocstty_eperm)
2344 r = 0;
2345
2346 if (r < 0 && (force || fail || errno != EPERM)) {
80876c20
LP		 2347 r = -errno;
2348 goto fail;
2349 }
2350
2351 if (r >= 0)
2352 break;
2353
2354 assert(!fail);
2355 assert(!force);
2356 assert(notify >= 0);
2357
2358 for (;;) {
f601daa7 2359 uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX];
80876c20 2360 ssize_t l;
f601daa7 2361 struct inotify_event *e;
80876c20 2362
f601daa7 2363 if ((l = read(notify, &inotify_buffer, sizeof(inotify_buffer))) < 0) {
80876c20 2364
f601daa7
LP		 2365 if (errno == EINTR)
2366 continue;
2367
2368 r = -errno;
2369 goto fail;
2370 }
2371
2372 e = (struct inotify_event*) inotify_buffer;
80876c20 2373
f601daa7
LP		 2374 while (l > 0) {
2375 size_t step;
80876c20 2376
f601daa7 2377 if (e->wd != wd || !(e->mask & IN_CLOSE)) {
80876c20 2378 r = -EIO;
f601daa7
LP		 2379 goto fail;
2380 }
80876c20 2381
f601daa7
LP		 2382 step = sizeof(struct inotify_event) + e->len;
2383 assert(step <= (size_t) l);
80876c20 2384
f601daa7
LP		 2385 e = (struct inotify_event*) ((uint8_t*) e + step);
2386 l -= step;
80876c20
LP		 2387 }
2388
2389 break;
2390 }
2391
2392 /* We close the tty fd here since if the old session
2393 * ended our handle will be dead. It's important that
2394 * we do this after sleeping, so that we don't enter
2395 * an endless loop. */
2396 close_nointr_nofail(fd);
2397 }
2398
2399 if (notify >= 0)
a16e1123 2400 close_nointr_nofail(notify);
80876c20
LP		 2401
2402 if ((r = reset_terminal(fd)) < 0)
2403 log_warning("Failed to reset terminal: %s", strerror(-r));
2404
2405 return fd;
2406
2407fail:
2408 if (fd >= 0)
a16e1123 2409 close_nointr_nofail(fd);
80876c20
LP		 2410
2411 if (notify >= 0)
a16e1123 2412 close_nointr_nofail(notify);
80876c20
LP		 2413
2414 return r;
2415}
2416
2417int release_terminal(void) {
2418 int r = 0, fd;
57cd2192 2419 struct sigaction sa_old, sa_new;
80876c20 2420
57cd2192 2421 if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY)) < 0)
80876c20
LP		 2422 return -errno;
2423
57cd2192
LP		 2424 /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
2425 * by our own TIOCNOTTY */
2426
2427 zero(sa_new);
2428 sa_new.sa_handler = SIG_IGN;
2429 sa_new.sa_flags = SA_RESTART;
2430 assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
2431
80876c20
LP		 2432 if (ioctl(fd, TIOCNOTTY) < 0)
2433 r = -errno;
2434
57cd2192
LP		 2435 assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
2436
80876c20
LP		 2437 close_nointr_nofail(fd);
2438 return r;
2439}
2440
9a34ec5f
LP		 2441int sigaction_many(const struct sigaction *sa, ...) {
2442 va_list ap;
2443 int r = 0, sig;
2444
2445 va_start(ap, sa);
2446 while ((sig = va_arg(ap, int)) > 0)
2447 if (sigaction(sig, sa, NULL) < 0)
2448 r = -errno;
2449 va_end(ap);
2450
2451 return r;
2452}
2453
2454int ignore_signals(int sig, ...) {
a337c6fc 2455 struct sigaction sa;
9a34ec5f
LP		 2456 va_list ap;
2457 int r = 0;
a337c6fc
LP		 2458
2459 zero(sa);
2460 sa.sa_handler = SIG_IGN;
2461 sa.sa_flags = SA_RESTART;
2462
9a34ec5f
LP		 2463 if (sigaction(sig, &sa, NULL) < 0)
2464 r = -errno;
2465
2466 va_start(ap, sig);
2467 while ((sig = va_arg(ap, int)) > 0)
2468 if (sigaction(sig, &sa, NULL) < 0)
2469 r = -errno;
2470 va_end(ap);
2471
2472 return r;
2473}
2474
2475int default_signals(int sig, ...) {
2476 struct sigaction sa;
2477 va_list ap;
2478 int r = 0;
2479
2480 zero(sa);
2481 sa.sa_handler = SIG_DFL;
2482 sa.sa_flags = SA_RESTART;
2483
2484 if (sigaction(sig, &sa, NULL) < 0)
2485 r = -errno;
2486
2487 va_start(ap, sig);
2488 while ((sig = va_arg(ap, int)) > 0)
2489 if (sigaction(sig, &sa, NULL) < 0)
2490 r = -errno;
2491 va_end(ap);
2492
2493 return r;
a337c6fc
LP		 2494}
2495
8d567588
LP		 2496int close_pipe(int p[]) {
2497 int a = 0, b = 0;
2498
2499 assert(p);
2500
2501 if (p[0] >= 0) {
2502 a = close_nointr(p[0]);
2503 p[0] = -1;
2504 }
2505
2506 if (p[1] >= 0) {
2507 b = close_nointr(p[1]);
2508 p[1] = -1;
2509 }
2510
2511 return a < 0 ? a : b;
2512}
2513
eb22ac37 2514ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
8d567588
LP		 2515 uint8_t *p;
2516 ssize_t n = 0;
2517
2518 assert(fd >= 0);
2519 assert(buf);
2520
2521 p = buf;
2522
2523 while (nbytes > 0) {
2524 ssize_t k;
2525
2526 if ((k = read(fd, p, nbytes)) <= 0) {
2527
eb22ac37 2528 if (k < 0 && errno == EINTR)
8d567588
LP		 2529 continue;
2530
eb22ac37 2531 if (k < 0 && errno == EAGAIN && do_poll) {
8d567588
LP		 2532 struct pollfd pollfd;
2533
2534 zero(pollfd);
2535 pollfd.fd = fd;
2536 pollfd.events = POLLIN;
2537
2538 if (poll(&pollfd, 1, -1) < 0) {
2539 if (errno == EINTR)
2540 continue;
2541
2542 return n > 0 ? n : -errno;
2543 }
2544
2545 if (pollfd.revents != POLLIN)
2546 return n > 0 ? n : -EIO;
2547
2548 continue;
2549 }
2550
2551 return n > 0 ? n : (k < 0 ? -errno : 0);
2552 }
2553
2554 p += k;
2555 nbytes -= k;
2556 n += k;
2557 }
2558
2559 return n;
2560}
2561
eb22ac37
LP		 2562ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
2563 const uint8_t *p;
2564 ssize_t n = 0;
2565
2566 assert(fd >= 0);
2567 assert(buf);
2568
2569 p = buf;
2570
2571 while (nbytes > 0) {
2572 ssize_t k;
2573
2574 if ((k = write(fd, p, nbytes)) <= 0) {
2575
2576 if (k < 0 && errno == EINTR)
2577 continue;
2578
2579 if (k < 0 && errno == EAGAIN && do_poll) {
2580 struct pollfd pollfd;
2581
2582 zero(pollfd);
2583 pollfd.fd = fd;
2584 pollfd.events = POLLOUT;
2585
2586 if (poll(&pollfd, 1, -1) < 0) {
2587 if (errno == EINTR)
2588 continue;
2589
2590 return n > 0 ? n : -errno;
2591 }
2592
2593 if (pollfd.revents != POLLOUT)
2594 return n > 0 ? n : -EIO;
2595
2596 continue;
2597 }
2598
2599 return n > 0 ? n : (k < 0 ? -errno : 0);
2600 }
2601
2602 p += k;
2603 nbytes -= k;
2604 n += k;
2605 }
2606
2607 return n;
2608}
2609
8d567588
LP		 2610int path_is_mount_point(const char *t) {
2611 struct stat a, b;
35d2e7ec
LP		 2612 char *parent;
2613 int r;
8d567588
LP		 2614
2615 if (lstat(t, &a) < 0) {
8d567588
LP		 2616 if (errno == ENOENT)
2617 return 0;
2618
2619 return -errno;
2620 }
2621
35d2e7ec
LP		 2622 if ((r = parent_of_path(t, &parent)) < 0)
2623 return r;
8d567588 2624
35d2e7ec
LP		 2625 r = lstat(parent, &b);
2626 free(parent);
8d567588 2627
35d2e7ec
LP		 2628 if (r < 0)
2629 return -errno;
8d567588
LP		 2630
2631 return a.st_dev != b.st_dev;
2632}
2633
24a6e4a4
LP		 2634int parse_usec(const char *t, usec_t *usec) {
2635 static const struct {
2636 const char *suffix;
2637 usec_t usec;
2638 } table[] = {
2639 { "sec", USEC_PER_SEC },
2640 { "s", USEC_PER_SEC },
2641 { "min", USEC_PER_MINUTE },
2642 { "hr", USEC_PER_HOUR },
2643 { "h", USEC_PER_HOUR },
2644 { "d", USEC_PER_DAY },
2645 { "w", USEC_PER_WEEK },
2646 { "msec", USEC_PER_MSEC },
2647 { "ms", USEC_PER_MSEC },
2648 { "m", USEC_PER_MINUTE },
2649 { "usec", 1ULL },
2650 { "us", 1ULL },
2651 { "", USEC_PER_SEC },
2652 };
2653
2654 const char *p;
2655 usec_t r = 0;
2656
2657 assert(t);
2658 assert(usec);
2659
2660 p = t;
2661 do {
2662 long long l;
2663 char *e;
2664 unsigned i;
2665
2666 errno = 0;
2667 l = strtoll(p, &e, 10);
2668
2669 if (errno != 0)
2670 return -errno;
2671
2672 if (l < 0)
2673 return -ERANGE;
2674
2675 if (e == p)
2676 return -EINVAL;
2677
2678 e += strspn(e, WHITESPACE);
2679
2680 for (i = 0; i < ELEMENTSOF(table); i++)
2681 if (startswith(e, table[i].suffix)) {
2682 r += (usec_t) l * table[i].usec;
2683 p = e + strlen(table[i].suffix);
2684 break;
2685 }
2686
2687 if (i >= ELEMENTSOF(table))
2688 return -EINVAL;
2689
2690 } while (*p != 0);
2691
2692 *usec = r;
2693
2694 return 0;
2695}
2696
843d2643
LP		 2697int make_stdio(int fd) {
2698 int r, s, t;
2699
2700 assert(fd >= 0);
2701
2702 r = dup2(fd, STDIN_FILENO);
2703 s = dup2(fd, STDOUT_FILENO);
2704 t = dup2(fd, STDERR_FILENO);
2705
2706 if (fd >= 3)
2707 close_nointr_nofail(fd);
2708
2709 if (r < 0 || s < 0 || t < 0)
2710 return -errno;
2711
2712 return 0;
2713}
2714
ade509ce
LP		 2715int make_null_stdio(void) {
2716 int null_fd;
2717
2718 if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0)
2719 return -errno;
2720
2721 return make_stdio(null_fd);
2722}
2723
8407a5d0
LP		 2724bool is_device_path(const char *path) {
2725
2726 /* Returns true on paths that refer to a device, either in
2727 * sysfs or in /dev */
2728
2729 return
2730 path_startswith(path, "/dev/") ||
2731 path_startswith(path, "/sys/");
2732}
2733
01f78473
LP		 2734int dir_is_empty(const char *path) {
2735 DIR *d;
2736 int r;
2737 struct dirent buf, *de;
2738
2739 if (!(d = opendir(path)))
2740 return -errno;
2741
2742 for (;;) {
2743 if ((r = readdir_r(d, &buf, &de)) > 0) {
2744 r = -r;
2745 break;
2746 }
2747
2748 if (!de) {
2749 r = 1;
2750 break;
2751 }
2752
2753 if (!ignore_file(de->d_name)) {
2754 r = 0;
2755 break;
2756 }
2757 }
2758
2759 closedir(d);
2760 return r;
2761}
2762
d3782d60
LP		 2763unsigned long long random_ull(void) {
2764 int fd;
2765 uint64_t ull;
2766 ssize_t r;
2767
2768 if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0)
2769 goto fallback;
2770
eb22ac37 2771 r = loop_read(fd, &ull, sizeof(ull), true);
d3782d60
LP		 2772 close_nointr_nofail(fd);
2773
2774 if (r != sizeof(ull))
2775 goto fallback;
2776
2777 return ull;
2778
2779fallback:
2780 return random() * RAND_MAX + random();
2781}
2782
5b6319dc
LP		 2783void rename_process(const char name[8]) {
2784 assert(name);
2785
2786 prctl(PR_SET_NAME, name);
2787
2788 /* This is a like a poor man's setproctitle(). The string
2789 * passed should fit in 7 chars (i.e. the length of
2790 * "systemd") */
2791
2792 if (program_invocation_name)
2793 strncpy(program_invocation_name, name, strlen(program_invocation_name));
2794}
2795
7d793605
LP		 2796void sigset_add_many(sigset_t *ss, ...) {
2797 va_list ap;
2798 int sig;
2799
2800 assert(ss);
2801
2802 va_start(ap, ss);
2803 while ((sig = va_arg(ap, int)) > 0)
2804 assert_se(sigaddset(ss, sig) == 0);
2805 va_end(ap);
2806}
2807
ef2f1067
LP		 2808char* gethostname_malloc(void) {
2809 struct utsname u;
2810
2811 assert_se(uname(&u) >= 0);
2812
2813 if (u.nodename[0])
2814 return strdup(u.nodename);
2815
2816 return strdup(u.sysname);
2817}
2818
2819char* getlogname_malloc(void) {
2820 uid_t uid;
2821 long bufsize;
2822 char *buf, *name;
2823 struct passwd pwbuf, *pw = NULL;
2824 struct stat st;
2825
2826 if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
2827 uid = st.st_uid;
2828 else
2829 uid = getuid();
2830
2831 /* Shortcut things to avoid NSS lookups */
2832 if (uid == 0)
2833 return strdup("root");
2834
2835 if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0)
2836 bufsize = 4096;
2837
2838 if (!(buf = malloc(bufsize)))
2839 return NULL;
2840
2841 if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) {
2842 name = strdup(pw->pw_name);
2843 free(buf);
2844 return name;
2845 }
2846
2847 free(buf);
2848
2849 if (asprintf(&name, "%lu", (unsigned long) uid) < 0)
2850 return NULL;
2851
2852 return name;
2853}
2854
fc116c6a
LP		 2855int getttyname_malloc(int fd, char **r) {
2856 char path[PATH_MAX], *c;
618e02c7 2857 int k;
8c6db833
LP		 2858
2859 assert(r);
ef2f1067 2860
fc116c6a 2861 if ((k = ttyname_r(fd, path, sizeof(path))) != 0)
618e02c7 2862 return -k;
ef2f1067
LP		 2863
2864 char_array_0(path);
2865
fc116c6a 2866 if (!(c = strdup(startswith(path, "/dev/") ? path + 5 : path)))
8c6db833
LP		 2867 return -ENOMEM;
2868
2869 *r = c;
2870 return 0;
2871}
2872
fc116c6a
LP		 2873int getttyname_harder(int fd, char **r) {
2874 int k;
2875 char *s;
2876
2877 if ((k = getttyname_malloc(fd, &s)) < 0)
2878 return k;
2879
2880 if (streq(s, "tty")) {
2881 free(s);
46824d0e 2882 return get_ctty(r, NULL);
fc116c6a
LP		 2883 }
2884
2885 *r = s;
2886 return 0;
2887}
2888
2889int get_ctty_devnr(dev_t *d) {
2890 int k;
2891 char line[256], *p;
2892 unsigned long ttynr;
2893 FILE *f;
2894
2895 if (!(f = fopen("/proc/self/stat", "r")))
2896 return -errno;
2897
2898 if (!(fgets(line, sizeof(line), f))) {
2899 k = -errno;
2900 fclose(f);
2901 return k;
2902 }
2903
2904 fclose(f);
2905
2906 if (!(p = strrchr(line, ')')))
2907 return -EIO;
2908
2909 p++;
2910
2911 if (sscanf(p, " "
2912 "%*c " /* state */
2913 "%*d " /* ppid */
2914 "%*d " /* pgrp */
2915 "%*d " /* session */
2916 "%lu ", /* ttynr */
2917 &ttynr) != 1)
2918 return -EIO;
2919
2920 *d = (dev_t) ttynr;
2921 return 0;
2922}
2923
46824d0e 2924int get_ctty(char **r, dev_t *_devnr) {
fc116c6a
LP		 2925 int k;
2926 char fn[128], *s, *b, *p;
2927 dev_t devnr;
2928
2929 assert(r);
2930
2931 if ((k = get_ctty_devnr(&devnr)) < 0)
2932 return k;
2933
2934 snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr));
2935 char_array_0(fn);
2936
2937 if ((k = readlink_malloc(fn, &s)) < 0) {
2938
2939 if (k != -ENOENT)
2940 return k;
2941
46824d0e
LP		 2942 /* This is an ugly hack */
2943 if (major(devnr) == 136) {
2944 if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0)
2945 return -ENOMEM;
2946
2947 *r = b;
2948 if (_devnr)
2949 *_devnr = devnr;
2950
2951 return 0;
2952 }
2953
fc116c6a
LP		 2954 /* Probably something like the ptys which have no
2955 * symlink in /dev/char. Let's return something
2956 * vaguely useful. */
2957
2958 if (!(b = strdup(fn + 5)))
2959 return -ENOMEM;
2960
2961 *r = b;
46824d0e
LP		 2962 if (_devnr)
2963 *_devnr = devnr;
2964
fc116c6a
LP		 2965 return 0;
2966 }
2967
2968 if (startswith(s, "/dev/"))
2969 p = s + 5;
2970 else if (startswith(s, "../"))
2971 p = s + 3;
2972 else
2973 p = s;
2974
2975 b = strdup(p);
2976 free(s);
2977
2978 if (!b)
2979 return -ENOMEM;
2980
2981 *r = b;
46824d0e
LP		 2982 if (_devnr)
2983 *_devnr = devnr;
2984
fc116c6a
LP		 2985 return 0;
2986}
2987
8c6db833
LP		 2988static int rm_rf_children(int fd, bool only_dirs) {
2989 DIR *d;
2990 int ret = 0;
2991
2992 assert(fd >= 0);
2993
2994 /* This returns the first error we run into, but nevertheless
2995 * tries to go on */
2996
2997 if (!(d = fdopendir(fd))) {
2998 close_nointr_nofail(fd);
4c633005
LP		 2999
3000 return errno == ENOENT ? 0 : -errno;
8c6db833
LP		 3001 }
3002
3003 for (;;) {
3004 struct dirent buf, *de;
3005 bool is_dir;
3006 int r;
3007
3008 if ((r = readdir_r(d, &buf, &de)) != 0) {
3009 if (ret == 0)
3010 ret = -r;
3011 break;
3012 }
3013
3014 if (!de)
3015 break;
3016
3017 if (streq(de->d_name, ".") || streq(de->d_name, ".."))
3018 continue;
3019
3020 if (de->d_type == DT_UNKNOWN) {
3021 struct stat st;
3022
3023 if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
4c633005 3024 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3025 ret = -errno;
3026 continue;
3027 }
3028
3029 is_dir = S_ISDIR(st.st_mode);
3030 } else
3031 is_dir = de->d_type == DT_DIR;
3032
3033 if (is_dir) {
3034 int subdir_fd;
3035
3036 if ((subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
4c633005 3037 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3038 ret = -errno;
3039 continue;
3040 }
3041
3042 if ((r = rm_rf_children(subdir_fd, only_dirs)) < 0) {
3043 if (ret == 0)
3044 ret = r;
3045 }
3046
3047 if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
4c633005 3048 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3049 ret = -errno;
3050 }
3051 } else if (!only_dirs) {
3052
3053 if (unlinkat(fd, de->d_name, 0) < 0) {
4c633005 3054 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3055 ret = -errno;
3056 }
3057 }
3058 }
3059
3060 closedir(d);
3061
3062 return ret;
3063}
3064
3065int rm_rf(const char *path, bool only_dirs, bool delete_root) {
3066 int fd;
3067 int r;
3068
3069 assert(path);
3070
3071 if ((fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
3072
3073 if (errno != ENOTDIR)
3074 return -errno;
3075
3076 if (delete_root && !only_dirs)
3077 if (unlink(path) < 0)
3078 return -errno;
3079
3080 return 0;
3081 }
3082
3083 r = rm_rf_children(fd, only_dirs);
3084
3085 if (delete_root)
3086 if (rmdir(path) < 0) {
3087 if (r == 0)
3088 r = -errno;
3089 }
3090
3091 return r;
3092}
3093
3094int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
3095 assert(path);
3096
3097 /* Under the assumption that we are running privileged we
3098 * first change the access mode and only then hand out
3099 * ownership to avoid a window where access is too open. */
3100
3101 if (chmod(path, mode) < 0)
3102 return -errno;
3103
3104 if (chown(path, uid, gid) < 0)
3105 return -errno;
3106
3107 return 0;
ef2f1067
LP		 3108}
3109
82c121a4
LP		 3110cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
3111 cpu_set_t *r;
3112 unsigned n = 1024;
3113
3114 /* Allocates the cpuset in the right size */
3115
3116 for (;;) {
3117 if (!(r = CPU_ALLOC(n)))
3118 return NULL;
3119
3120 if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) {
3121 CPU_ZERO_S(CPU_ALLOC_SIZE(n), r);
3122
3123 if (ncpus)
3124 *ncpus = n;
3125
3126 return r;
3127 }
3128
3129 CPU_FREE(r);
3130
3131 if (errno != EINVAL)
3132 return NULL;
3133
3134 n *= 2;
3135 }
3136}
3137
9e58ff9c
LP		 3138void status_vprintf(const char *format, va_list ap) {
3139 char *s = NULL;
3140 int fd = -1;
3141
3142 assert(format);
3143
3144 /* This independent of logging, as status messages are
3145 * optional and go exclusively to the console. */
3146
3147 if (vasprintf(&s, format, ap) < 0)
3148 goto finish;
3149
3150 if ((fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0)
3151 goto finish;
3152
3153 write(fd, s, strlen(s));
3154
3155finish:
3156 free(s);
3157
3158 if (fd >= 0)
3159 close_nointr_nofail(fd);
3160}
3161
c846ff47
LP		 3162void status_printf(const char *format, ...) {
3163 va_list ap;
3164
3165 assert(format);
3166
3167 va_start(ap, format);
3168 status_vprintf(format, ap);
3169 va_end(ap);
3170}
3171
3172void status_welcome(void) {
10aa7034
LP		 3173 char *pretty_name = NULL, *ansi_color = NULL;
3174 const char *const_pretty = NULL, *const_color = NULL;
3175 int r;
c846ff47 3176
10aa7034
LP		 3177 if ((r = parse_env_file("/etc/os-release", NEWLINE,
3178 "PRETTY_NAME", &pretty_name,
3179 "ANSI_COLOR", &ansi_color,
3180 NULL)) < 0) {
c846ff47 3181
10aa7034
LP		 3182 if (r != -ENOENT)
3183 log_warning("Failed to read /etc/os-release: %s", strerror(-r));
3184 }
c846ff47 3185
10aa7034
LP		 3186#if defined(TARGET_FEDORA)
3187 if (!pretty_name) {
3188 if ((r = read_one_line_file("/etc/system-release", &pretty_name)) < 0) {
c846ff47 3189
10aa7034
LP		 3190 if (r != -ENOENT)
3191 log_warning("Failed to read /etc/system-release: %s", strerror(-r));
3192 } else
3193 truncate_nl(pretty_name);
3194 }
c846ff47 3195
10aa7034 3196 if (!ansi_color && pretty_name) {
c846ff47 3197
10aa7034
LP		 3198 /* This tries to mimic the color magic the old Red Hat sysinit
3199 * script did. */
3200
3201 if (startswith(pretty_name, "Red Hat"))
3202 const_color = "0;31"; /* Red for RHEL */
3203 else if (startswith(pretty_name, "Fedora"))
3204 const_color = "0;34"; /* Blue for Fedora */
3205 }
c846ff47
LP		 3206
3207#elif defined(TARGET_SUSE)
c846ff47 3208
10aa7034
LP		 3209 if (!pretty_name) {
3210 if ((r = read_one_line_file("/etc/SuSE-release", &pretty_name)) < 0) {
c846ff47 3211
10aa7034
LP		 3212 if (r != -ENOENT)
3213 log_warning("Failed to read /etc/SuSE-release: %s", strerror(-r));
3214 } else
3215 truncate_nl(pretty_name);
3216 }
c846ff47 3217
10aa7034
LP		 3218 if (!ansi_color)
3219 const_color = "0;32"; /* Green for openSUSE */
5a6225fd 3220
0d37b36b 3221#elif defined(TARGET_GENTOO)
0d37b36b 3222
10aa7034
LP		 3223 if (!pretty_name) {
3224 if ((r = read_one_line_file("/etc/gentoo-release", &pretty_name)) < 0) {
0d37b36b 3225
10aa7034
LP		 3226 if (r != -ENOENT)
3227 log_warning("Failed to read /etc/gentoo-release: %s", strerror(-r));
3228 } else
3229 truncate_nl(pretty_name);
3230 }
0d37b36b 3231
10aa7034
LP		 3232 if (!ansi_color)
3233 const_color = "1;34"; /* Light Blue for Gentoo */
5a6225fd 3234
a338bab5
AS		 3235#elif defined(TARGET_ALTLINUX)
3236
3237 if (!pretty_name) {
3238 if ((r = read_one_line_file("/etc/altlinux-release", &pretty_name)) < 0) {
3239
3240 if (r != -ENOENT)
3241 log_warning("Failed to read /etc/altlinux-release: %s", strerror(-r));
3242 } else
3243 truncate_nl(pretty_name);
3244 }
3245
3246 if (!ansi_color)
3247 const_color = "0;36"; /* Cyan for ALTLinux */
3248
3249
5a6225fd 3250#elif defined(TARGET_DEBIAN)
5a6225fd 3251
10aa7034 3252 if (!pretty_name) {
22927a36 3253 char *version;
c8bffa43 3254
22927a36 3255 if ((r = read_one_line_file("/etc/debian_version", &version)) < 0) {
5a6225fd 3256
10aa7034
LP		 3257 if (r != -ENOENT)
3258 log_warning("Failed to read /etc/debian_version: %s", strerror(-r));
22927a36
MB		 3259 } else {
3260 truncate_nl(version);
3261 pretty_name = strappend("Debian ", version);
3262 free(version);
c8bffa43
LP		 3263
3264 if (!pretty_name)
3265 log_warning("Failed to allocate Debian version string.");
22927a36 3266 }
10aa7034 3267 }
5a6225fd 3268
10aa7034
LP		 3269 if (!ansi_color)
3270 const_color = "1;31"; /* Light Red for Debian */
5a6225fd 3271
274914f9 3272#elif defined(TARGET_UBUNTU)
10aa7034
LP		 3273
3274 if ((r = parse_env_file("/etc/lsb-release", NEWLINE,
3275 "DISTRIB_DESCRIPTION", &pretty_name,
3276 NULL)) < 0) {
3277
3278 if (r != -ENOENT)
3279 log_warning("Failed to read /etc/lsb-release: %s", strerror(-r));
3280 }
3281
3282 if (!ansi_color)
3283 const_color = "0;33"; /* Orange/Brown for Ubuntu */
3284
1de4d79b
AB		 3285#elif defined(TARGET_MANDRIVA)
3286
3287 if (!pretty_name) {
3288 char *s, *p;
3289
3290 if ((r = read_one_line_file("/etc/mandriva-release", &s) < 0)) {
3291 if (r != -ENOENT)
3292 log_warning("Failed to read /etc/mandriva-release: %s", strerror(-r));
3293 } else {
3294 p = strstr(s, " release ");
3295 if (p) {
3296 *p = '\0';
3297 p += 9;
3298 p[strcspn(p, " ")] = '\0';
3299
3300 /* This corresponds to standard rc.sysinit */
3301 if (asprintf(&pretty_name, "%s\x1B[0;39m %s", s, p) > 0)
3302 const_color = "1;36";
3303 else
3304 log_warning("Failed to allocate Mandriva version string.");
3305 } else
3306 log_warning("Failed to parse /etc/mandriva-release");
3307 free(s);
3308 }
3309 }
3310
c846ff47 3311#endif
10aa7034
LP		 3312
3313 if (!pretty_name && !const_pretty)
3314 const_pretty = "Linux";
3315
3316 if (!ansi_color && !const_color)
3317 const_color = "1";
3318
da71f23c 3319 status_printf("\nWelcome to \x1B[%sm%s\x1B[0m!\n\n",
10aa7034
LP		 3320 const_color ? const_color : ansi_color,
3321 const_pretty ? const_pretty : pretty_name);
86a3475b
LP		 3322
3323 free(ansi_color);
3324 free(pretty_name);
c846ff47
LP		 3325}
3326
fab56fc5
LP		 3327char *replace_env(const char *format, char **env) {
3328 enum {
3329 WORD,
c24eb49e 3330 CURLY,
fab56fc5
LP		 3331 VARIABLE
3332 } state = WORD;
3333
3334 const char *e, *word = format;
3335 char *r = NULL, *k;
3336
3337 assert(format);
3338
3339 for (e = format; *e; e ++) {
3340
3341 switch (state) {
3342
3343 case WORD:
3344 if (*e == '$')
c24eb49e 3345 state = CURLY;
fab56fc5
LP		 3346 break;
3347
c24eb49e
LP		 3348 case CURLY:
3349 if (*e == '{') {
fab56fc5
LP		 3350 if (!(k = strnappend(r, word, e-word-1)))
3351 goto fail;
3352
3353 free(r);
3354 r = k;
3355
3356 word = e-1;
3357 state = VARIABLE;
3358
3359 } else if (*e == '$') {
3360 if (!(k = strnappend(r, word, e-word)))
3361 goto fail;
3362
3363 free(r);
3364 r = k;
3365
3366 word = e+1;
3367 state = WORD;
3368 } else
3369 state = WORD;
3370 break;
3371
3372 case VARIABLE:
c24eb49e 3373 if (*e == '}') {
b95cf362 3374 const char *t;
fab56fc5 3375
b95cf362
LP		 3376 if (!(t = strv_env_get_with_length(env, word+2, e-word-2)))
3377 t = "";
fab56fc5 3378
b95cf362
LP		 3379 if (!(k = strappend(r, t)))
3380 goto fail;
fab56fc5 3381
b95cf362
LP		 3382 free(r);
3383 r = k;
fab56fc5 3384
b95cf362 3385 word = e+1;
fab56fc5
LP		 3386 state = WORD;
3387 }
3388 break;
3389 }
3390 }
3391
3392 if (!(k = strnappend(r, word, e-word)))
3393 goto fail;
3394
3395 free(r);
3396 return k;
3397
3398fail:
3399 free(r);
3400 return NULL;
3401}
3402
3403char **replace_env_argv(char **argv, char **env) {
3404 char **r, **i;
c24eb49e
LP		 3405 unsigned k = 0, l = 0;
3406
3407 l = strv_length(argv);
fab56fc5 3408
c24eb49e 3409 if (!(r = new(char*, l+1)))
fab56fc5
LP		 3410 return NULL;
3411
3412 STRV_FOREACH(i, argv) {
c24eb49e
LP		 3413
3414 /* If $FOO appears as single word, replace it by the split up variable */
b95cf362
LP		 3415 if ((*i)[0] == '$' && (*i)[1] != '{') {
3416 char *e;
3417 char **w, **m;
3418 unsigned q;
c24eb49e 3419
b95cf362 3420 if ((e = strv_env_get(env, *i+1))) {
c24eb49e
LP		 3421
3422 if (!(m = strv_split_quoted(e))) {
3423 r[k] = NULL;
3424 strv_free(r);
3425 return NULL;
3426 }
b95cf362
LP		 3427 } else
3428 m = NULL;
c24eb49e 3429
b95cf362
LP		 3430 q = strv_length(m);
3431 l = l + q - 1;
c24eb49e 3432
b95cf362
LP		 3433 if (!(w = realloc(r, sizeof(char*) * (l+1)))) {
3434 r[k] = NULL;
3435 strv_free(r);
3436 strv_free(m);
3437 return NULL;
3438 }
c24eb49e 3439
b95cf362
LP		 3440 r = w;
3441 if (m) {
c24eb49e
LP		 3442 memcpy(r + k, m, q * sizeof(char*));
3443 free(m);
c24eb49e 3444 }
b95cf362
LP		 3445
3446 k += q;
3447 continue;
c24eb49e
LP		 3448 }
3449
3450 /* If ${FOO} appears as part of a word, replace it by the variable as-is */
fab56fc5
LP		 3451 if (!(r[k++] = replace_env(*i, env))) {
3452 strv_free(r);
3453 return NULL;
3454 }
3455 }
3456
3457 r[k] = NULL;
3458 return r;
3459}
3460
fa776d8e
LP		 3461int columns(void) {
3462 static __thread int parsed_columns = 0;
3463 const char *e;
3464
3465 if (parsed_columns > 0)
3466 return parsed_columns;
3467
3468 if ((e = getenv("COLUMNS")))
3469 parsed_columns = atoi(e);
3470
3471 if (parsed_columns <= 0) {
3472 struct winsize ws;
3473 zero(ws);
3474
9ed95f43 3475 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) >= 0)
fa776d8e
LP		 3476 parsed_columns = ws.ws_col;
3477 }
3478
3479 if (parsed_columns <= 0)
3480 parsed_columns = 80;
3481
3482 return parsed_columns;
3483}
3484
b4f10a5e
LP		 3485int running_in_chroot(void) {
3486 struct stat a, b;
3487
3488 zero(a);
3489 zero(b);
3490
3491 /* Only works as root */
3492
3493 if (stat("/proc/1/root", &a) < 0)
3494 return -errno;
3495
3496 if (stat("/", &b) < 0)
3497 return -errno;
3498
3499 return
3500 a.st_dev != b.st_dev ||
3501 a.st_ino != b.st_ino;
3502}
3503
8fe914ec
LP		 3504char *ellipsize(const char *s, unsigned length, unsigned percent) {
3505 size_t l, x;
3506 char *r;
3507
3508 assert(s);
3509 assert(percent <= 100);
3510 assert(length >= 3);
3511
3512 l = strlen(s);
3513
3514 if (l <= 3 || l <= length)
3515 return strdup(s);
3516
3517 if (!(r = new0(char, length+1)))
3518 return r;
3519
3520 x = (length * percent) / 100;
3521
3522 if (x > length - 3)
3523 x = length - 3;
3524
3525 memcpy(r, s, x);
3526 r[x] = '.';
3527 r[x+1] = '.';
3528 r[x+2] = '.';
3529 memcpy(r + x + 3,
3530 s + l - (length - x - 3),
3531 length - x - 3);
3532
3533 return r;
3534}
3535
f6144808
LP		 3536int touch(const char *path) {
3537 int fd;
3538
3539 assert(path);
3540
14f3c825 3541 if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0)
f6144808
LP		 3542 return -errno;
3543
3544 close_nointr_nofail(fd);
3545 return 0;
3546}
afea26ad 3547
97c4a07d 3548char *unquote(const char *s, const char* quotes) {
11ce3427
LP		 3549 size_t l;
3550 assert(s);
3551
3552 if ((l = strlen(s)) < 2)
3553 return strdup(s);
3554
97c4a07d 3555 if (strchr(quotes, s[0]) && s[l-1] == s[0])
11ce3427
LP		 3556 return strndup(s+1, l-2);
3557
3558 return strdup(s);
3559}
3560
5f7c426e
LP		 3561char *normalize_env_assignment(const char *s) {
3562 char *name, *value, *p, *r;
3563
3564 p = strchr(s, '=');
3565
3566 if (!p) {
3567 if (!(r = strdup(s)))
3568 return NULL;
3569
3570 return strstrip(r);
3571 }
3572
3573 if (!(name = strndup(s, p - s)))
3574 return NULL;
3575
3576 if (!(p = strdup(p+1))) {
3577 free(name);
3578 return NULL;
3579 }
3580
3581 value = unquote(strstrip(p), QUOTES);
3582 free(p);
3583
3584 if (!value) {
3585 free(p);
3586 free(name);
3587 return NULL;
3588 }
3589
3590 if (asprintf(&r, "%s=%s", name, value) < 0)
3591 r = NULL;
3592
3593 free(value);
3594 free(name);
3595
3596 return r;
3597}
3598
8e12a6ae 3599int wait_for_terminate(pid_t pid, siginfo_t *status) {
2e78aa99
LP		 3600 assert(pid >= 1);
3601 assert(status);
3602
3603 for (;;) {
8e12a6ae
LP		 3604 zero(*status);
3605
3606 if (waitid(P_PID, pid, status, WEXITED) < 0) {
2e78aa99
LP		 3607
3608 if (errno == EINTR)
3609 continue;
3610
3611 return -errno;
3612 }
3613
3614 return 0;
3615 }
3616}
3617
97c4a07d
LP		 3618int wait_for_terminate_and_warn(const char *name, pid_t pid) {
3619 int r;
3620 siginfo_t status;
3621
3622 assert(name);
3623 assert(pid > 1);
3624
3625 if ((r = wait_for_terminate(pid, &status)) < 0) {
3626 log_warning("Failed to wait for %s: %s", name, strerror(-r));
3627 return r;
3628 }
3629
3630 if (status.si_code == CLD_EXITED) {
3631 if (status.si_status != 0) {
3632 log_warning("%s failed with error code %i.", name, status.si_status);
0a27cf3f 3633 return status.si_status;
97c4a07d
LP		 3634 }
3635
3636 log_debug("%s succeeded.", name);
3637 return 0;
3638
3639 } else if (status.si_code == CLD_KILLED ||
3640 status.si_code == CLD_DUMPED) {
3641
3642 log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status));
3643 return -EPROTO;
3644 }
3645
3646 log_warning("%s failed due to unknown reason.", name);
3647 return -EPROTO;
3648
3649}
3650
3c14d26c 3651void freeze(void) {
720ce21d
LP		 3652
3653 /* Make sure nobody waits for us on a socket anymore */
3654 close_all_fds(NULL, 0);
3655
c29597a1
LP		 3656 sync();
3657
3c14d26c
LP		 3658 for (;;)
3659 pause();
3660}
3661
00dc5d76
LP		 3662bool null_or_empty(struct stat *st) {
3663 assert(st);
3664
3665 if (S_ISREG(st->st_mode) && st->st_size <= 0)
3666 return true;
3667
c8f26f42 3668 if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode))
00dc5d76
LP		 3669 return true;
3670
3671 return false;
3672}
3673
a247755d 3674DIR *xopendirat(int fd, const char *name, int flags) {
c4731d11
LP		 3675 int nfd;
3676 DIR *d;
3677
3678 if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0)
3679 return NULL;
3680
3681 if (!(d = fdopendir(nfd))) {
3682 close_nointr_nofail(nfd);
3683 return NULL;
3684 }
3685
3686 return d;
3b63d2d3
LP		 3687}
3688
8a0867d6
LP		 3689int signal_from_string_try_harder(const char *s) {
3690 int signo;
3691 assert(s);
3692
3693 if ((signo = signal_from_string(s)) <= 0)
3694 if (startswith(s, "SIG"))
3695 return signal_from_string(s+3);
3696
3697 return signo;
3698}
3699
10717a1a
LP		 3700void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) {
3701
3702 assert(f);
3703 assert(name);
3704 assert(t);
3705
3706 if (!dual_timestamp_is_set(t))
3707 return;
3708
3709 fprintf(f, "%s=%llu %llu\n",
3710 name,
3711 (unsigned long long) t->realtime,
3712 (unsigned long long) t->monotonic);
3713}
3714
799fd0fd 3715void dual_timestamp_deserialize(const char *value, dual_timestamp *t) {
10717a1a
LP		 3716 unsigned long long a, b;
3717
10717a1a
LP		 3718 assert(value);
3719 assert(t);
3720
3721 if (sscanf(value, "%lli %llu", &a, &b) != 2)
3722 log_debug("Failed to parse finish timestamp value %s", value);
3723 else {
3724 t->realtime = a;
3725 t->monotonic = b;
3726 }
3727}
3728
e23a0ce8
LP		 3729char *fstab_node_to_udev_node(const char *p) {
3730 char *dn, *t, *u;
3731 int r;
3732
3733 /* FIXME: to follow udev's logic 100% we need to leave valid
3734 * UTF8 chars unescaped */
3735
3736 if (startswith(p, "LABEL=")) {
3737
3738 if (!(u = unquote(p+6, "\"\'")))
3739 return NULL;
3740
3741 t = xescape(u, "/ ");
3742 free(u);
3743
3744 if (!t)
3745 return NULL;
3746
3747 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
3748 free(t);
3749
3750 if (r < 0)
3751 return NULL;
3752
3753 return dn;
3754 }
3755
3756 if (startswith(p, "UUID=")) {
3757
3758 if (!(u = unquote(p+5, "\"\'")))
3759 return NULL;
3760
3761 t = xescape(u, "/ ");
3762 free(u);
3763
3764 if (!t)
3765 return NULL;
3766
0058d7b9 3767 r = asprintf(&dn, "/dev/disk/by-uuid/%s", t);
e23a0ce8
LP		 3768 free(t);
3769
3770 if (r < 0)
3771 return NULL;
3772
3773 return dn;
3774 }
3775
3776 return strdup(p);
3777}
3778
e9ddabc2
LP		 3779void filter_environ(const char *prefix) {
3780 int i, j;
3781 assert(prefix);
3782
3783 if (!environ)
3784 return;
3785
3786 for (i = 0, j = 0; environ[i]; i++) {
3787
3788 if (startswith(environ[i], prefix))
3789 continue;
3790
3791 environ[j++] = environ[i];
3792 }
3793
3794 environ[j] = NULL;
3795}
3796
f212ac12
LP		 3797bool tty_is_vc(const char *tty) {
3798 assert(tty);
3799
3800 if (startswith(tty, "/dev/"))
3801 tty += 5;
3802
3803 return startswith(tty, "tty") &&
3804 tty[3] >= '0' && tty[3] <= '9';
3805}
3806
e3aa71c3 3807const char *default_term_for_tty(const char *tty) {
3030ccd7
LP		 3808 char *active = NULL;
3809 const char *term;
3810
e3aa71c3
LP		 3811 assert(tty);
3812
3813 if (startswith(tty, "/dev/"))
3814 tty += 5;
3815
3030ccd7
LP		 3816 /* Resolve where /dev/console is pointing when determining
3817 * TERM */
3818 if (streq(tty, "console"))
3819 if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) {
3820 truncate_nl(active);
079a09fb
LP		 3821
3822 /* If multiple log outputs are configured the
3823 * last one is what /dev/console points to */
3824 if ((tty = strrchr(active, ' ')))
3825 tty++;
3826 else
3827 tty = active;
3030ccd7
LP		 3828 }
3829
f212ac12 3830 term = tty_is_vc(tty) ? "TERM=linux" : "TERM=vt100";
3030ccd7 3831 free(active);
e3aa71c3 3832
3030ccd7 3833 return term;
e3aa71c3
LP		 3834}
3835
07faed4f
LP		 3836/* Returns a short identifier for the various VM implementations */
3837int detect_vm(const char **id) {
46a08e38
LP		 3838
3839#if defined(__i386__) || defined(__x86_64__)
3840
3841 /* Both CPUID and DMI are x86 specific interfaces... */
3842
721bca57 3843 static const char *const dmi_vendors[] = {
46a08e38
LP		 3844 "/sys/class/dmi/id/sys_vendor",
3845 "/sys/class/dmi/id/board_vendor",
3846 "/sys/class/dmi/id/bios_vendor"
3847 };
3848
4e08da90 3849 static const char dmi_vendor_table[] =
07faed4f
LP		 3850 "QEMU\0" "qemu\0"
3851 /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
3852 "VMware\0" "vmware\0"
3853 "VMW\0" "vmware\0"
3854 "Microsoft Corporation\0" "microsoft\0"
3855 "innotek GmbH\0" "oracle\0"
3856 "Xen\0" "xen\0"
34df5a34 3857 "Bochs\0" "bochs\0";
07faed4f 3858
4e08da90 3859 static const char cpuid_vendor_table[] =
07faed4f
LP		 3860 "XenVMMXenVMM\0" "xen\0"
3861 "KVMKVMKVM\0" "kvm\0"
3862 /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
3863 "VMwareVMware\0" "vmware\0"
3864 /* http://msdn.microsoft.com/en-us/library/ff542428.aspx */
34df5a34 3865 "Microsoft Hv\0" "microsoft\0";
07faed4f
LP		 3866
3867 uint32_t eax, ecx;
46a08e38
LP		 3868 union {
3869 uint32_t sig32[3];
3870 char text[13];
3871 } sig;
46a08e38 3872 unsigned i;
07faed4f 3873 const char *j, *k;
721bca57 3874 bool hypervisor;
46a08e38
LP		 3875
3876 /* http://lwn.net/Articles/301888/ */
3877 zero(sig);
3878
46a08e38
LP		 3879#if defined (__i386__)
3880#define REG_a "eax"
3881#define REG_b "ebx"
3882#elif defined (__amd64__)
3883#define REG_a "rax"
3884#define REG_b "rbx"
3885#endif
3886
07faed4f
LP		 3887 /* First detect whether there is a hypervisor */
3888 eax = 1;
46a08e38
LP		 3889 __asm__ __volatile__ (
3890 /* ebx/rbx is being used for PIC! */
3891 " push %%"REG_b" \n\t"
3892 " cpuid \n\t"
46a08e38
LP		 3893 " pop %%"REG_b" \n\t"
3894
07faed4f 3895 : "=a" (eax), "=c" (ecx)
46a08e38
LP		 3896 : "0" (eax)
3897 );
3898
721bca57
LP		 3899 hypervisor = !!(ecx & ecx & 0x80000000U);
3900
3901 if (hypervisor) {
07faed4f
LP		 3902
3903 /* There is a hypervisor, see what it is */
3904 eax = 0x40000000U;
3905 __asm__ __volatile__ (
3906 /* ebx/rbx is being used for PIC! */
3907 " push %%"REG_b" \n\t"
3908 " cpuid \n\t"
3909 " mov %%ebx, %1 \n\t"
3910 " pop %%"REG_b" \n\t"
3911
3912 : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2])
3913 : "0" (eax)
3914 );
3915
3916 NULSTR_FOREACH_PAIR(j, k, cpuid_vendor_table)
3917 if (streq(sig.text, j)) {
3918
3919 if (id)
3920 *id = k;
3921
3922 return 1;
3923 }
721bca57 3924 }
07faed4f 3925
721bca57
LP		 3926 for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) {
3927 char *s;
3928 int r;
3929 const char *found = NULL;
3930
3931 if ((r = read_one_line_file(dmi_vendors[i], &s)) < 0) {
3932 if (r != -ENOENT)
3933 return r;
3934
3935 continue;
3936 }
3937
3938 NULSTR_FOREACH_PAIR(j, k, dmi_vendor_table)
3939 if (startswith(s, j))
3940 found = k;
3941 free(s);
3942
3943 if (found) {
3944 if (id)
3945 *id = found;
3946
3947 return 1;
3948 }
3949 }
3950
3951 if (hypervisor) {
07faed4f
LP		 3952 if (id)
3953 *id = "other";
3954
3955 return 1;
3956 }
46a08e38 3957
721bca57 3958#endif
07faed4f
LP		 3959 return 0;
3960}
3961
ef2df9f4 3962int detect_container(const char **id) {
f9b9232b
LP		 3963 FILE *f;
3964
ef2df9f4
LP		 3965 /* Unfortunately many of these operations require root access
3966 * in one way or another */
f9b9232b 3967
ef2df9f4
LP		 3968 if (geteuid() != 0)
3969 return -EPERM;
3970
3971 if (running_in_chroot() > 0) {
f9b9232b
LP		 3972
3973 if (id)
ef2df9f4 3974 *id = "chroot";
f9b9232b
LP		 3975
3976 return 1;
3977 }
07faed4f 3978
ef2df9f4
LP		 3979 /* /proc/vz exists in container and outside of the container,
3980 * /proc/bc only outside of the container. */
3981 if (access("/proc/vz", F_OK) >= 0 &&
3982 access("/proc/bc", F_OK) < 0) {
07faed4f 3983
ef2df9f4
LP		 3984 if (id)
3985 *id = "openvz";
3986
3987 return 1;
f9b9232b 3988 }
07faed4f 3989
f9b9232b
LP		 3990 if ((f = fopen("/proc/self/cgroup", "r"))) {
3991
3992 for (;;) {
3993 char line[LINE_MAX], *p;
3994
3995 if (!fgets(line, sizeof(line), f))
3996 break;
3997
3998 if (!(p = strchr(strstrip(line), ':')))
3999 continue;
4000
4001 if (strncmp(p, ":ns:", 4))
4002 continue;
4003
4004 if (!streq(p, ":ns:/")) {
4005 fclose(f);
4006
ef2df9f4 4007 if (id)
28cf382a 4008 *id = "pidns";
ef2df9f4
LP		 4009
4010 return 1;
f9b9232b
LP		 4011 }
4012 }
4013
4014 fclose(f);
07faed4f
LP		 4015 }
4016
ef2df9f4
LP		 4017 return 0;
4018}
4019
4020/* Returns a short identifier for the various VM/container implementations */
4021int detect_virtualization(const char **id) {
4022 static __thread const char *cached_id = NULL;
4023 const char *_id;
4024 int r;
4025
4026 if (cached_id) {
4027
4028 if (cached_id == (const char*) -1)
4029 return 0;
4030
4031 if (id)
4032 *id = cached_id;
4033
4034 return 1;
f9b9232b 4035 }
07faed4f 4036
ef2df9f4
LP		 4037 if ((r = detect_container(&_id)) != 0)
4038 goto finish;
4039
f9b9232b 4040 r = detect_vm(&_id);
07faed4f 4041
f9b9232b 4042finish:
ef2df9f4 4043 if (r > 0) {
f9b9232b 4044 cached_id = _id;
07faed4f 4045
ef2df9f4
LP		 4046 if (id)
4047 *id = _id;
4048 } else if (r == 0)
4049 cached_id = (const char*) -1;
f9b9232b
LP		 4050
4051 return r;
46a08e38
LP		 4052}
4053
83cc030f
LP		 4054void execute_directory(const char *directory, DIR *d, char *argv[]) {
4055 DIR *_d = NULL;
4056 struct dirent *de;
4057 Hashmap *pids = NULL;
4058
4059 assert(directory);
4060
4061 /* Executes all binaries in a directory in parallel and waits
4062 * until all they all finished. */
4063
4064 if (!d) {
4065 if (!(_d = opendir(directory))) {
4066
4067 if (errno == ENOENT)
4068 return;
4069
4070 log_error("Failed to enumerate directory %s: %m", directory);
4071 return;
4072 }
4073
4074 d = _d;
4075 }
4076
4077 if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) {
4078 log_error("Failed to allocate set.");
4079 goto finish;
4080 }
4081
4082 while ((de = readdir(d))) {
4083 char *path;
4084 pid_t pid;
4085 int k;
4086
4087 if (ignore_file(de->d_name))
4088 continue;
4089
4090 if (de->d_type != DT_REG &&
4091 de->d_type != DT_LNK &&
4092 de->d_type != DT_UNKNOWN)
4093 continue;
4094
4095 if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) {
4096 log_error("Out of memory");
4097 continue;
4098 }
4099
4100 if ((pid = fork()) < 0) {
4101 log_error("Failed to fork: %m");
4102 free(path);
4103 continue;
4104 }
4105
4106 if (pid == 0) {
4107 char *_argv[2];
4108 /* Child */
4109
4110 if (!argv) {
4111 _argv[0] = path;
4112 _argv[1] = NULL;
4113 argv = _argv;
4114 } else
4115 if (!argv[0])
4116 argv[0] = path;
4117
4118 execv(path, argv);
4119
4120 log_error("Failed to execute %s: %m", path);
4121 _exit(EXIT_FAILURE);
4122 }
4123
4124 log_debug("Spawned %s as %lu", path, (unsigned long) pid);
4125
4126 if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) {
4127 log_error("Failed to add PID to set: %s", strerror(-k));
4128 free(path);
4129 }
4130 }
4131
4132 while (!hashmap_isempty(pids)) {
4133 siginfo_t si;
4134 char *path;
4135
4136 zero(si);
4137 if (waitid(P_ALL, 0, &si, WEXITED) < 0) {
4138
4139 if (errno == EINTR)
4140 continue;
4141
4142 log_error("waitid() failed: %m");
4143 goto finish;
4144 }
4145
4146 if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) {
4147 if (!is_clean_exit(si.si_code, si.si_status)) {
4148 if (si.si_code == CLD_EXITED)
4149 log_error("%s exited with exit status %i.", path, si.si_status);
4150 else
4151 log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status));
4152 } else
4153 log_debug("%s exited successfully.", path);
4154
4155 free(path);
4156 }
4157 }
4158
4159finish:
4160 if (_d)
4161 closedir(_d);
4162
4163 if (pids)
4164 hashmap_free_free(pids);
4165}
4166
430c18ed
LP		 4167int kill_and_sigcont(pid_t pid, int sig) {
4168 int r;
4169
4170 r = kill(pid, sig) < 0 ? -errno : 0;
4171
4172 if (r >= 0)
4173 kill(pid, SIGCONT);
4174
4175 return r;
4176}
4177
05feefe0
LP		 4178bool nulstr_contains(const char*nulstr, const char *needle) {
4179 const char *i;
4180
4181 if (!nulstr)
4182 return false;
4183
4184 NULSTR_FOREACH(i, nulstr)
4185 if (streq(i, needle))
4186 return true;
4187
4188 return false;
4189}
4190
6faa1114
LP		 4191bool plymouth_running(void) {
4192 return access("/run/initramfs/plymouth", F_OK) >= 0;
4193}
4194
1dccbe19
LP		 4195static const char *const ioprio_class_table[] = {
4196 [IOPRIO_CLASS_NONE] = "none",
4197 [IOPRIO_CLASS_RT] = "realtime",
4198 [IOPRIO_CLASS_BE] = "best-effort",
4199 [IOPRIO_CLASS_IDLE] = "idle"
4200};
4201
4202DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int);
4203
4204static const char *const sigchld_code_table[] = {
4205 [CLD_EXITED] = "exited",
4206 [CLD_KILLED] = "killed",
4207 [CLD_DUMPED] = "dumped",
4208 [CLD_TRAPPED] = "trapped",
4209 [CLD_STOPPED] = "stopped",
4210 [CLD_CONTINUED] = "continued",
4211};
4212
4213DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
4214
4215static const char *const log_facility_table[LOG_NFACILITIES] = {
4216 [LOG_FAC(LOG_KERN)] = "kern",
4217 [LOG_FAC(LOG_USER)] = "user",
4218 [LOG_FAC(LOG_MAIL)] = "mail",
4219 [LOG_FAC(LOG_DAEMON)] = "daemon",
4220 [LOG_FAC(LOG_AUTH)] = "auth",
4221 [LOG_FAC(LOG_SYSLOG)] = "syslog",
4222 [LOG_FAC(LOG_LPR)] = "lpr",
4223 [LOG_FAC(LOG_NEWS)] = "news",
4224 [LOG_FAC(LOG_UUCP)] = "uucp",
4225 [LOG_FAC(LOG_CRON)] = "cron",
4226 [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
4227 [LOG_FAC(LOG_FTP)] = "ftp",
4228 [LOG_FAC(LOG_LOCAL0)] = "local0",
4229 [LOG_FAC(LOG_LOCAL1)] = "local1",
4230 [LOG_FAC(LOG_LOCAL2)] = "local2",
4231 [LOG_FAC(LOG_LOCAL3)] = "local3",
4232 [LOG_FAC(LOG_LOCAL4)] = "local4",
4233 [LOG_FAC(LOG_LOCAL5)] = "local5",
4234 [LOG_FAC(LOG_LOCAL6)] = "local6",
4235 [LOG_FAC(LOG_LOCAL7)] = "local7"
4236};
4237
4238DEFINE_STRING_TABLE_LOOKUP(log_facility, int);
4239
4240static const char *const log_level_table[] = {
4241 [LOG_EMERG] = "emerg",
4242 [LOG_ALERT] = "alert",
4243 [LOG_CRIT] = "crit",
4244 [LOG_ERR] = "err",
4245 [LOG_WARNING] = "warning",
4246 [LOG_NOTICE] = "notice",
4247 [LOG_INFO] = "info",
4248 [LOG_DEBUG] = "debug"
4249};
4250
4251DEFINE_STRING_TABLE_LOOKUP(log_level, int);
4252
4253static const char* const sched_policy_table[] = {
4254 [SCHED_OTHER] = "other",
4255 [SCHED_BATCH] = "batch",
4256 [SCHED_IDLE] = "idle",
4257 [SCHED_FIFO] = "fifo",
4258 [SCHED_RR] = "rr"
4259};
4260
4261DEFINE_STRING_TABLE_LOOKUP(sched_policy, int);
4262
4263static const char* const rlimit_table[] = {
4264 [RLIMIT_CPU] = "LimitCPU",
4265 [RLIMIT_FSIZE] = "LimitFSIZE",
4266 [RLIMIT_DATA] = "LimitDATA",
4267 [RLIMIT_STACK] = "LimitSTACK",
4268 [RLIMIT_CORE] = "LimitCORE",
4269 [RLIMIT_RSS] = "LimitRSS",
4270 [RLIMIT_NOFILE] = "LimitNOFILE",
4271 [RLIMIT_AS] = "LimitAS",
4272 [RLIMIT_NPROC] = "LimitNPROC",
4273 [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
4274 [RLIMIT_LOCKS] = "LimitLOCKS",
4275 [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
4276 [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
4277 [RLIMIT_NICE] = "LimitNICE",
4278 [RLIMIT_RTPRIO] = "LimitRTPRIO",
4279 [RLIMIT_RTTIME] = "LimitRTTIME"
4280};
4281
4282DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
4fd5948e
LP		 4283
4284static const char* const ip_tos_table[] = {
4285 [IPTOS_LOWDELAY] = "low-delay",
4286 [IPTOS_THROUGHPUT] = "throughput",
4287 [IPTOS_RELIABILITY] = "reliability",
4288 [IPTOS_LOWCOST] = "low-cost",
4289};
4290
4291DEFINE_STRING_TABLE_LOOKUP(ip_tos, int);
2e22afe9
LP		 4292
4293static const char *const signal_table[] = {
4294 [SIGHUP] = "HUP",
4295 [SIGINT] = "INT",
4296 [SIGQUIT] = "QUIT",
4297 [SIGILL] = "ILL",
4298 [SIGTRAP] = "TRAP",
4299 [SIGABRT] = "ABRT",
4300 [SIGBUS] = "BUS",
4301 [SIGFPE] = "FPE",
4302 [SIGKILL] = "KILL",
4303 [SIGUSR1] = "USR1",
4304 [SIGSEGV] = "SEGV",
4305 [SIGUSR2] = "USR2",
4306 [SIGPIPE] = "PIPE",
4307 [SIGALRM] = "ALRM",
4308 [SIGTERM] = "TERM",
f26ee0b9
LP		 4309#ifdef SIGSTKFLT
4310 [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */
4311#endif
2e22afe9
LP		 4312 [SIGCHLD] = "CHLD",
4313 [SIGCONT] = "CONT",
4314 [SIGSTOP] = "STOP",
4315 [SIGTSTP] = "TSTP",
4316 [SIGTTIN] = "TTIN",
4317 [SIGTTOU] = "TTOU",
4318 [SIGURG] = "URG",
4319 [SIGXCPU] = "XCPU",
4320 [SIGXFSZ] = "XFSZ",
4321 [SIGVTALRM] = "VTALRM",
4322 [SIGPROF] = "PROF",
4323 [SIGWINCH] = "WINCH",
4324 [SIGIO] = "IO",
4325 [SIGPWR] = "PWR",
4326 [SIGSYS] = "SYS"
4327};
4328
4329DEFINE_STRING_TABLE_LOOKUP(signal, int);
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