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socket: use 666 socket mode by default since neither fifos, nor sockets, nor mqueues...
[thirdparty/systemd.git] / src / util.c
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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>
ac123445 53#include <sys/capability.h>
60918275
LP		 54
55#include "macro.h"
56#include "util.h"
1dccbe19
LP		 57#include "ioprio.h"
58#include "missing.h"
a9f5d454 59#include "log.h"
65d2ebdc 60#include "strv.h"
e51bc1a2 61#include "label.h"
d06dacd0 62#include "exit-status.h"
83cc030f 63#include "hashmap.h"
56cf987f 64
37f85e66 65size_t page_size(void) {
66 static __thread size_t pgsz = 0;
67 long r;
68
69 if (pgsz)
70 return pgsz;
71
72 assert_se((r = sysconf(_SC_PAGESIZE)) > 0);
73
74 pgsz = (size_t) r;
75
76 return pgsz;
77}
78
e05797fb
LP		 79bool streq_ptr(const char *a, const char *b) {
80
81 /* Like streq(), but tries to make sense of NULL pointers */
82
83 if (a && b)
84 return streq(a, b);
85
86 if (!a && !b)
87 return true;
88
89 return false;
90}
91
47be870b 92usec_t now(clockid_t clock_id) {
60918275
LP		 93 struct timespec ts;
94
47be870b 95 assert_se(clock_gettime(clock_id, &ts) == 0);
60918275
LP		 96
97 return timespec_load(&ts);
98}
99
63983207 100dual_timestamp* dual_timestamp_get(dual_timestamp *ts) {
871d7de4
LP		 101 assert(ts);
102
103 ts->realtime = now(CLOCK_REALTIME);
104 ts->monotonic = now(CLOCK_MONOTONIC);
105
106 return ts;
107}
108
60918275
LP		 109usec_t timespec_load(const struct timespec *ts) {
110 assert(ts);
111
112 return
113 (usec_t) ts->tv_sec * USEC_PER_SEC +
114 (usec_t) ts->tv_nsec / NSEC_PER_USEC;
115}
116
117struct timespec *timespec_store(struct timespec *ts, usec_t u) {
118 assert(ts);
119
120 ts->tv_sec = (time_t) (u / USEC_PER_SEC);
121 ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
122
123 return ts;
124}
125
126usec_t timeval_load(const struct timeval *tv) {
127 assert(tv);
128
129 return
130 (usec_t) tv->tv_sec * USEC_PER_SEC +
131 (usec_t) tv->tv_usec;
132}
133
134struct timeval *timeval_store(struct timeval *tv, usec_t u) {
135 assert(tv);
136
137 tv->tv_sec = (time_t) (u / USEC_PER_SEC);
138 tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
139
140 return tv;
141}
142
143bool endswith(const char *s, const char *postfix) {
144 size_t sl, pl;
145
146 assert(s);
147 assert(postfix);
148
149 sl = strlen(s);
150 pl = strlen(postfix);
151
d4d0d4db
LP		 152 if (pl == 0)
153 return true;
154
60918275
LP		 155 if (sl < pl)
156 return false;
157
158 return memcmp(s + sl - pl, postfix, pl) == 0;
159}
160
161bool startswith(const char *s, const char *prefix) {
162 size_t sl, pl;
163
164 assert(s);
165 assert(prefix);
166
167 sl = strlen(s);
168 pl = strlen(prefix);
169
d4d0d4db
LP		 170 if (pl == 0)
171 return true;
172
60918275
LP		 173 if (sl < pl)
174 return false;
175
176 return memcmp(s, prefix, pl) == 0;
177}
178
3177a7fa
MAP		 179bool startswith_no_case(const char *s, const char *prefix) {
180 size_t sl, pl;
181 unsigned i;
182
183 assert(s);
184 assert(prefix);
185
186 sl = strlen(s);
187 pl = strlen(prefix);
188
189 if (pl == 0)
190 return true;
191
192 if (sl < pl)
193 return false;
194
195 for(i = 0; i < pl; ++i) {
196 if (tolower(s[i]) != tolower(prefix[i]))
197 return false;
198 }
199
200 return true;
201}
202
79d6d816
LP		 203bool first_word(const char *s, const char *word) {
204 size_t sl, wl;
205
206 assert(s);
207 assert(word);
208
209 sl = strlen(s);
210 wl = strlen(word);
211
212 if (sl < wl)
213 return false;
214
d4d0d4db
LP		 215 if (wl == 0)
216 return true;
217
79d6d816
LP		 218 if (memcmp(s, word, wl) != 0)
219 return false;
220
d4d0d4db
LP		 221 return s[wl] == 0 ||
222 strchr(WHITESPACE, s[wl]);
79d6d816
LP		 223}
224
42f4e3c4 225int close_nointr(int fd) {
60918275
LP		 226 assert(fd >= 0);
227
228 for (;;) {
229 int r;
230
231 if ((r = close(fd)) >= 0)
232 return r;
233
234 if (errno != EINTR)
235 return r;
236 }
237}
85261803 238
85f136b5 239void close_nointr_nofail(int fd) {
80876c20 240 int saved_errno = errno;
85f136b5
LP		 241
242 /* like close_nointr() but cannot fail, and guarantees errno
243 * is unchanged */
244
245 assert_se(close_nointr(fd) == 0);
80876c20
LP		 246
247 errno = saved_errno;
85f136b5
LP		 248}
249
5b6319dc
LP		 250void close_many(const int fds[], unsigned n_fd) {
251 unsigned i;
252
253 for (i = 0; i < n_fd; i++)
254 close_nointr_nofail(fds[i]);
255}
256
85261803
LP		 257int parse_boolean(const char *v) {
258 assert(v);
259
44d8db9e 260 if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
85261803 261 return 1;
44d8db9e 262 else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
85261803
LP		 263 return 0;
264
265 return -EINVAL;
266}
267
3ba686c1 268int parse_pid(const char *s, pid_t* ret_pid) {
0b172489 269 unsigned long ul = 0;
3ba686c1
LP		 270 pid_t pid;
271 int r;
272
273 assert(s);
274 assert(ret_pid);
275
276 if ((r = safe_atolu(s, &ul)) < 0)
277 return r;
278
279 pid = (pid_t) ul;
280
281 if ((unsigned long) pid != ul)
282 return -ERANGE;
283
284 if (pid <= 0)
285 return -ERANGE;
286
287 *ret_pid = pid;
288 return 0;
289}
290
85261803
LP		 291int safe_atou(const char *s, unsigned *ret_u) {
292 char *x = NULL;
034c6ed7 293 unsigned long l;
85261803
LP		 294
295 assert(s);
296 assert(ret_u);
297
298 errno = 0;
299 l = strtoul(s, &x, 0);
300
301 if (!x || *x || errno)
302 return errno ? -errno : -EINVAL;
303
034c6ed7 304 if ((unsigned long) (unsigned) l != l)
85261803
LP		 305 return -ERANGE;
306
307 *ret_u = (unsigned) l;
308 return 0;
309}
310
311int safe_atoi(const char *s, int *ret_i) {
312 char *x = NULL;
034c6ed7 313 long l;
85261803
LP		 314
315 assert(s);
316 assert(ret_i);
317
318 errno = 0;
319 l = strtol(s, &x, 0);
320
321 if (!x || *x || errno)
322 return errno ? -errno : -EINVAL;
323
034c6ed7 324 if ((long) (int) l != l)
85261803
LP		 325 return -ERANGE;
326
034c6ed7
LP		 327 *ret_i = (int) l;
328 return 0;
329}
330
034c6ed7
LP		 331int safe_atollu(const char *s, long long unsigned *ret_llu) {
332 char *x = NULL;
333 unsigned long long l;
334
335 assert(s);
336 assert(ret_llu);
337
338 errno = 0;
339 l = strtoull(s, &x, 0);
340
341 if (!x || *x || errno)
342 return errno ? -errno : -EINVAL;
343
344 *ret_llu = l;
345 return 0;
346}
347
348int safe_atolli(const char *s, long long int *ret_lli) {
349 char *x = NULL;
350 long long l;
351
352 assert(s);
353 assert(ret_lli);
354
355 errno = 0;
356 l = strtoll(s, &x, 0);
357
358 if (!x || *x || errno)
359 return errno ? -errno : -EINVAL;
360
361 *ret_lli = l;
85261803
LP		 362 return 0;
363}
a41e8209 364
a41e8209 365/* Split a string into words. */
65d2ebdc 366char *split(const char *c, size_t *l, const char *separator, char **state) {
a41e8209
LP		 367 char *current;
368
369 current = *state ? *state : (char*) c;
370
371 if (!*current || *c == 0)
372 return NULL;
373
65d2ebdc
LP		 374 current += strspn(current, separator);
375 *l = strcspn(current, separator);
82919e3d
LP		 376 *state = current+*l;
377
378 return (char*) current;
379}
380
034c6ed7
LP		 381/* Split a string into words, but consider strings enclosed in '' and
382 * "" as words even if they include spaces. */
383char *split_quoted(const char *c, size_t *l, char **state) {
0bab36f2
LP		 384 char *current, *e;
385 bool escaped = false;
034c6ed7
LP		 386
387 current = *state ? *state : (char*) c;
388
389 if (!*current || *c == 0)
390 return NULL;
391
392 current += strspn(current, WHITESPACE);
393
394 if (*current == '\'') {
395 current ++;
034c6ed7 396
0bab36f2
LP		 397 for (e = current; *e; e++) {
398 if (escaped)
399 escaped = false;
400 else if (*e == '\\')
401 escaped = true;
402 else if (*e == '\'')
403 break;
404 }
405
406 *l = e-current;
407 *state = *e == 0 ? e : e+1;
034c6ed7
LP		 408 } else if (*current == '\"') {
409 current ++;
034c6ed7 410
0bab36f2
LP		 411 for (e = current; *e; e++) {
412 if (escaped)
413 escaped = false;
414 else if (*e == '\\')
415 escaped = true;
416 else if (*e == '\"')
417 break;
418 }
419
420 *l = e-current;
421 *state = *e == 0 ? e : e+1;
034c6ed7 422 } else {
0bab36f2
LP		 423 for (e = current; *e; e++) {
424 if (escaped)
425 escaped = false;
426 else if (*e == '\\')
427 escaped = true;
428 else if (strchr(WHITESPACE, *e))
429 break;
430 }
431 *l = e-current;
432 *state = e;
034c6ed7
LP		 433 }
434
435 return (char*) current;
436}
437
65d2ebdc
LP		 438char **split_path_and_make_absolute(const char *p) {
439 char **l;
440 assert(p);
441
442 if (!(l = strv_split(p, ":")))
443 return NULL;
444
445 if (!strv_path_make_absolute_cwd(l)) {
446 strv_free(l);
447 return NULL;
448 }
449
450 return l;
451}
452
034c6ed7
LP		 453int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
454 int r;
455 FILE *f;
20c03b7b 456 char fn[PATH_MAX], line[LINE_MAX], *p;
bb00e604 457 long unsigned ppid;
034c6ed7 458
8480e784 459 assert(pid > 0);
034c6ed7
LP		 460 assert(_ppid);
461
bb00e604 462 assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1));
8480e784 463 char_array_0(fn);
034c6ed7
LP		 464
465 if (!(f = fopen(fn, "r")))
466 return -errno;
467
468 if (!(fgets(line, sizeof(line), f))) {
469 r = -errno;
470 fclose(f);
471 return r;
472 }
473
474 fclose(f);
475
476 /* Let's skip the pid and comm fields. The latter is enclosed
477 * in () but does not escape any () in its value, so let's
478 * skip over it manually */
479
480 if (!(p = strrchr(line, ')')))
481 return -EIO;
482
483 p++;
484
485 if (sscanf(p, " "
486 "%*c " /* state */
bb00e604 487 "%lu ", /* ppid */
034c6ed7
LP		 488 &ppid) != 1)
489 return -EIO;
490
bb00e604 491 if ((long unsigned) (pid_t) ppid != ppid)
034c6ed7
LP		 492 return -ERANGE;
493
494 *_ppid = (pid_t) ppid;
495
496 return 0;
497}
498
7640a5de
LP		 499int get_starttime_of_pid(pid_t pid, unsigned long long *st) {
500 int r;
501 FILE *f;
502 char fn[PATH_MAX], line[LINE_MAX], *p;
503
504 assert(pid > 0);
505 assert(st);
506
507 assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1));
508 char_array_0(fn);
509
510 if (!(f = fopen(fn, "r")))
511 return -errno;
512
513 if (!(fgets(line, sizeof(line), f))) {
514 r = -errno;
515 fclose(f);
516 return r;
517 }
518
519 fclose(f);
520
521 /* Let's skip the pid and comm fields. The latter is enclosed
522 * in () but does not escape any () in its value, so let's
523 * skip over it manually */
524
525 if (!(p = strrchr(line, ')')))
526 return -EIO;
527
528 p++;
529
530 if (sscanf(p, " "
531 "%*c " /* state */
532 "%*d " /* ppid */
533 "%*d " /* pgrp */
534 "%*d " /* session */
535 "%*d " /* tty_nr */
536 "%*d " /* tpgid */
537 "%*u " /* flags */
538 "%*u " /* minflt */
539 "%*u " /* cminflt */
540 "%*u " /* majflt */
541 "%*u " /* cmajflt */
542 "%*u " /* utime */
543 "%*u " /* stime */
544 "%*d " /* cutime */
545 "%*d " /* cstime */
546 "%*d " /* priority */
547 "%*d " /* nice */
548 "%*d " /* num_threads */
549 "%*d " /* itrealvalue */
550 "%llu " /* starttime */,
551 st) != 1)
552 return -EIO;
553
554 return 0;
555}
556
034c6ed7
LP		 557int write_one_line_file(const char *fn, const char *line) {
558 FILE *f;
559 int r;
560
561 assert(fn);
562 assert(line);
563
564 if (!(f = fopen(fn, "we")))
565 return -errno;
566
567 if (fputs(line, f) < 0) {
568 r = -errno;
569 goto finish;
570 }
571
8e1bd70d
LP		 572 if (!endswith(line, "\n"))
573 fputc('\n', f);
574
151b190e
LP		 575 fflush(f);
576
577 if (ferror(f)) {
578 if (errno != 0)
579 r = -errno;
580 else
581 r = -EIO;
582 } else
583 r = 0;
584
034c6ed7
LP		 585finish:
586 fclose(f);
587 return r;
588}
589
590int read_one_line_file(const char *fn, char **line) {
591 FILE *f;
592 int r;
97c4a07d 593 char t[LINE_MAX], *c;
034c6ed7
LP		 594
595 assert(fn);
596 assert(line);
597
598 if (!(f = fopen(fn, "re")))
599 return -errno;
600
601 if (!(fgets(t, sizeof(t), f))) {
602 r = -errno;
603 goto finish;
604 }
605
606 if (!(c = strdup(t))) {
607 r = -ENOMEM;
608 goto finish;
609 }
610
6f9a471a
LP		 611 truncate_nl(c);
612
034c6ed7
LP		 613 *line = c;
614 r = 0;
615
616finish:
617 fclose(f);
618 return r;
619}
44d8db9e 620
97c4a07d
LP		 621int read_full_file(const char *fn, char **contents) {
622 FILE *f;
623 int r;
624 size_t n, l;
625 char *buf = NULL;
626 struct stat st;
627
628 if (!(f = fopen(fn, "re")))
629 return -errno;
630
631 if (fstat(fileno(f), &st) < 0) {
632 r = -errno;
633 goto finish;
634 }
635
636 n = st.st_size > 0 ? st.st_size : LINE_MAX;
637 l = 0;
638
639 for (;;) {
640 char *t;
641 size_t k;
642
643 if (!(t = realloc(buf, n+1))) {
644 r = -ENOMEM;
645 goto finish;
646 }
647
648 buf = t;
649 k = fread(buf + l, 1, n - l, f);
650
651 if (k <= 0) {
652 if (ferror(f)) {
653 r = -errno;
654 goto finish;
655 }
656
657 break;
658 }
659
660 l += k;
661 n *= 2;
662
663 /* Safety check */
664 if (n > 4*1024*1024) {
665 r = -E2BIG;
666 goto finish;
667 }
668 }
669
670 if (buf)
671 buf[l] = 0;
672 else if (!(buf = calloc(1, 1))) {
673 r = -errno;
674 goto finish;
675 }
676
677 *contents = buf;
678 buf = NULL;
679
680 r = 0;
681
682finish:
683 fclose(f);
684 free(buf);
685
686 return r;
687}
688
689int parse_env_file(
690 const char *fname,
c899f8c6 691 const char *separator, ...) {
97c4a07d 692
ce8a6aa1 693 int r = 0;
97c4a07d
LP		 694 char *contents, *p;
695
696 assert(fname);
c899f8c6 697 assert(separator);
97c4a07d
LP		 698
699 if ((r = read_full_file(fname, &contents)) < 0)
700 return r;
701
702 p = contents;
703 for (;;) {
704 const char *key = NULL;
705
c899f8c6 706 p += strspn(p, separator);
97c4a07d
LP		 707 p += strspn(p, WHITESPACE);
708
709 if (!*p)
710 break;
711
712 if (!strchr(COMMENTS, *p)) {
713 va_list ap;
714 char **value;
715
c899f8c6 716 va_start(ap, separator);
97c4a07d
LP		 717 while ((key = va_arg(ap, char *))) {
718 size_t n;
719 char *v;
720
721 value = va_arg(ap, char **);
722
723 n = strlen(key);
724 if (strncmp(p, key, n) != 0 ||
725 p[n] != '=')
726 continue;
727
728 p += n + 1;
c899f8c6 729 n = strcspn(p, separator);
97c4a07d
LP		 730
731 if (n >= 2 &&
e7db37dd
LP		 732 strchr(QUOTES, p[0]) &&
733 p[n-1] == p[0])
97c4a07d
LP		 734 v = strndup(p+1, n-2);
735 else
736 v = strndup(p, n);
737
738 if (!v) {
739 r = -ENOMEM;
740 va_end(ap);
741 goto fail;
742 }
743
dd36de4d
KS		 744 if (v[0] == '\0') {
745 /* return empty value strings as NULL */
746 free(v);
747 v = NULL;
748 }
749
97c4a07d
LP		 750 free(*value);
751 *value = v;
752
753 p += n;
ce8a6aa1
LP		 754
755 r ++;
97c4a07d
LP		 756 break;
757 }
758 va_end(ap);
759 }
760
761 if (!key)
c899f8c6 762 p += strcspn(p, separator);
97c4a07d
LP		 763 }
764
97c4a07d
LP		 765fail:
766 free(contents);
767 return r;
768}
769
8c7be95e
LP		 770int load_env_file(
771 const char *fname,
772 char ***rl) {
773
774 FILE *f;
775 char **m = 0;
776 int r;
777
778 assert(fname);
779 assert(rl);
780
781 if (!(f = fopen(fname, "re")))
782 return -errno;
783
784 while (!feof(f)) {
785 char l[LINE_MAX], *p, *u;
786 char **t;
787
788 if (!fgets(l, sizeof(l), f)) {
789 if (feof(f))
790 break;
791
792 r = -errno;
793 goto finish;
794 }
795
796 p = strstrip(l);
797
798 if (!*p)
799 continue;
800
801 if (strchr(COMMENTS, *p))
802 continue;
803
804 if (!(u = normalize_env_assignment(p))) {
805 log_error("Out of memory");
806 r = -ENOMEM;
807 goto finish;
808 }
809
810 t = strv_append(m, u);
811 free(u);
812
813 if (!t) {
814 log_error("Out of memory");
815 r = -ENOMEM;
816 goto finish;
817 }
818
819 strv_free(m);
820 m = t;
821 }
822
823 r = 0;
824
825 *rl = m;
826 m = NULL;
827
828finish:
829 if (f)
830 fclose(f);
831
832 strv_free(m);
833
834 return r;
835}
836
7640a5de
LP		 837int write_env_file(const char *fname, char **l) {
838
839 char **i;
840 FILE *f;
841 int r;
842
843 f = fopen(fname, "we");
844 if (!f)
845 return -errno;
846
847 STRV_FOREACH(i, l) {
848 fputs(*i, f);
849 fputc('\n', f);
850 }
851
852 fflush(f);
853
854 r = ferror(f) ? -errno : 0;
855 fclose(f);
856
857 return r;
858}
859
7072ced8
LP		 860char *truncate_nl(char *s) {
861 assert(s);
862
863 s[strcspn(s, NEWLINE)] = 0;
864 return s;
865}
866
867int get_process_name(pid_t pid, char **name) {
868 char *p;
869 int r;
870
871 assert(pid >= 1);
872 assert(name);
873
bb00e604 874 if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0)
7072ced8
LP		 875 return -ENOMEM;
876
877 r = read_one_line_file(p, name);
878 free(p);
879
880 if (r < 0)
881 return r;
882
7072ced8
LP		 883 return 0;
884}
885
c59760ee
LP		 886int get_process_cmdline(pid_t pid, size_t max_length, char **line) {
887 char *p, *r, *k;
888 int c;
889 bool space = false;
890 size_t left;
891 FILE *f;
892
893 assert(pid >= 1);
894 assert(max_length > 0);
895 assert(line);
896
897 if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0)
898 return -ENOMEM;
899
900 f = fopen(p, "r");
901 free(p);
902
903 if (!f)
904 return -errno;
905
906 if (!(r = new(char, max_length))) {
907 fclose(f);
908 return -ENOMEM;
909 }
910
911 k = r;
912 left = max_length;
913 while ((c = getc(f)) != EOF) {
914
915 if (isprint(c)) {
916 if (space) {
917 if (left <= 4)
918 break;
919
920 *(k++) = ' ';
057fbb58 921 left--;
c59760ee
LP		 922 space = false;
923 }
924
925 if (left <= 4)
926 break;
927
928 *(k++) = (char) c;
057fbb58 929 left--;
c59760ee
LP		 930 } else
931 space = true;
932 }
933
934 if (left <= 4) {
935 size_t n = MIN(left-1, 3U);
936 memcpy(k, "...", n);
937 k[n] = 0;
938 } else
939 *k = 0;
940
941 fclose(f);
942
35d2e7ec
LP		 943 /* Kernel threads have no argv[] */
944 if (r[0] == 0) {
945 char *t;
946 int h;
947
948 free(r);
949
950 if ((h = get_process_name(pid, &t)) < 0)
951 return h;
952
953 h = asprintf(&r, "[%s]", t);
954 free(t);
955
956 if (h < 0)
957 return -ENOMEM;
958 }
fa776d8e 959
c59760ee
LP		 960 *line = r;
961 return 0;
962}
963
fab56fc5
LP		 964char *strnappend(const char *s, const char *suffix, size_t b) {
965 size_t a;
44d8db9e
LP		 966 char *r;
967
fab56fc5
LP		 968 if (!s && !suffix)
969 return strdup("");
970
971 if (!s)
972 return strndup(suffix, b);
973
974 if (!suffix)
975 return strdup(s);
976
44d8db9e
LP		 977 assert(s);
978 assert(suffix);
979
980 a = strlen(s);
44d8db9e
LP		 981
982 if (!(r = new(char, a+b+1)))
983 return NULL;
984
985 memcpy(r, s, a);
986 memcpy(r+a, suffix, b);
987 r[a+b] = 0;
988
989 return r;
990}
87f0e418 991
fab56fc5
LP		 992char *strappend(const char *s, const char *suffix) {
993 return strnappend(s, suffix, suffix ? strlen(suffix) : 0);
994}
995
87f0e418
LP		 996int readlink_malloc(const char *p, char **r) {
997 size_t l = 100;
998
999 assert(p);
1000 assert(r);
1001
1002 for (;;) {
1003 char *c;
1004 ssize_t n;
1005
1006 if (!(c = new(char, l)))
1007 return -ENOMEM;
1008
1009 if ((n = readlink(p, c, l-1)) < 0) {
1010 int ret = -errno;
1011 free(c);
1012 return ret;
1013 }
1014
1015 if ((size_t) n < l-1) {
1016 c[n] = 0;
1017 *r = c;
1018 return 0;
1019 }
1020
1021 free(c);
1022 l *= 2;
1023 }
1024}
1025
2c7108c4
LP		 1026int readlink_and_make_absolute(const char *p, char **r) {
1027 char *target, *k;
1028 int j;
1029
1030 assert(p);
1031 assert(r);
1032
1033 if ((j = readlink_malloc(p, &target)) < 0)
1034 return j;
1035
1036 k = file_in_same_dir(p, target);
1037 free(target);
1038
1039 if (!k)
1040 return -ENOMEM;
1041
1042 *r = k;
1043 return 0;
1044}
1045
35d2e7ec
LP		 1046int parent_of_path(const char *path, char **_r) {
1047 const char *e, *a = NULL, *b = NULL, *p;
1048 char *r;
1049 bool slash = false;
1050
1051 assert(path);
1052 assert(_r);
1053
1054 if (!*path)
1055 return -EINVAL;
1056
1057 for (e = path; *e; e++) {
1058
1059 if (!slash && *e == '/') {
1060 a = b;
1061 b = e;
1062 slash = true;
1063 } else if (slash && *e != '/')
1064 slash = false;
1065 }
1066
1067 if (*(e-1) == '/')
1068 p = a;
1069 else
1070 p = b;
1071
1072 if (!p)
1073 return -EINVAL;
1074
1075 if (p == path)
1076 r = strdup("/");
1077 else
1078 r = strndup(path, p-path);
1079
1080 if (!r)
1081 return -ENOMEM;
1082
1083 *_r = r;
1084 return 0;
1085}
1086
1087
87f0e418
LP		 1088char *file_name_from_path(const char *p) {
1089 char *r;
1090
1091 assert(p);
1092
1093 if ((r = strrchr(p, '/')))
1094 return r + 1;
1095
1096 return (char*) p;
1097}
0301abf4
LP		 1098
1099bool path_is_absolute(const char *p) {
1100 assert(p);
1101
1102 return p[0] == '/';
1103}
1104
1105bool is_path(const char *p) {
1106
1107 return !!strchr(p, '/');
1108}
1109
1110char *path_make_absolute(const char *p, const char *prefix) {
1111 char *r;
1112
1113 assert(p);
1114
65d2ebdc
LP		 1115 /* Makes every item in the list an absolute path by prepending
1116 * the prefix, if specified and necessary */
1117
0301abf4
LP		 1118 if (path_is_absolute(p) || !prefix)
1119 return strdup(p);
1120
1121 if (asprintf(&r, "%s/%s", prefix, p) < 0)
1122 return NULL;
1123
1124 return r;
1125}
2a987ee8 1126
65d2ebdc
LP		 1127char *path_make_absolute_cwd(const char *p) {
1128 char *cwd, *r;
1129
1130 assert(p);
1131
1132 /* Similar to path_make_absolute(), but prefixes with the
1133 * current working directory. */
1134
1135 if (path_is_absolute(p))
1136 return strdup(p);
1137
1138 if (!(cwd = get_current_dir_name()))
1139 return NULL;
1140
1141 r = path_make_absolute(p, cwd);
1142 free(cwd);
1143
1144 return r;
1145}
1146
1147char **strv_path_make_absolute_cwd(char **l) {
1148 char **s;
1149
1150 /* Goes through every item in the string list and makes it
1151 * absolute. This works in place and won't rollback any
1152 * changes on failure. */
1153
1154 STRV_FOREACH(s, l) {
1155 char *t;
1156
1157 if (!(t = path_make_absolute_cwd(*s)))
1158 return NULL;
1159
1160 free(*s);
1161 *s = t;
1162 }
1163
1164 return l;
1165}
1166
c3f6d675
LP		 1167char **strv_path_canonicalize(char **l) {
1168 char **s;
1169 unsigned k = 0;
1170 bool enomem = false;
1171
1172 if (strv_isempty(l))
1173 return l;
1174
1175 /* Goes through every item in the string list and canonicalize
1176 * the path. This works in place and won't rollback any
1177 * changes on failure. */
1178
1179 STRV_FOREACH(s, l) {
1180 char *t, *u;
1181
1182 t = path_make_absolute_cwd(*s);
1183 free(*s);
1184
1185 if (!t) {
1186 enomem = true;
1187 continue;
1188 }
1189
1190 errno = 0;
1191 u = canonicalize_file_name(t);
1192 free(t);
1193
1194 if (!u) {
1195 if (errno == ENOMEM || !errno)
1196 enomem = true;
1197
1198 continue;
1199 }
1200
1201 l[k++] = u;
1202 }
1203
1204 l[k] = NULL;
1205
1206 if (enomem)
1207 return NULL;
1208
1209 return l;
a9dd2082
LP		 1210}
1211
1212char **strv_path_remove_empty(char **l) {
1213 char **f, **t;
1214
1215 if (!l)
1216 return NULL;
1217
1218 for (f = t = l; *f; f++) {
1219
1220 if (dir_is_empty(*f) > 0) {
1221 free(*f);
1222 continue;
1223 }
1224
1225 *(t++) = *f;
1226 }
1227
1228 *t = NULL;
1229 return l;
c3f6d675
LP		 1230}
1231
2a987ee8
LP		 1232int reset_all_signal_handlers(void) {
1233 int sig;
1234
1235 for (sig = 1; sig < _NSIG; sig++) {
1236 struct sigaction sa;
1237
1238 if (sig == SIGKILL || sig == SIGSTOP)
1239 continue;
1240
1241 zero(sa);
1242 sa.sa_handler = SIG_DFL;
431c32bf 1243 sa.sa_flags = SA_RESTART;
2a987ee8
LP		 1244
1245 /* On Linux the first two RT signals are reserved by
1246 * glibc, and sigaction() will return EINVAL for them. */
1247 if ((sigaction(sig, &sa, NULL) < 0))
1248 if (errno != EINVAL)
1249 return -errno;
1250 }
1251
8e274523 1252 return 0;
2a987ee8 1253}
4a72ff34
LP		 1254
1255char *strstrip(char *s) {
1256 char *e, *l = NULL;
1257
1258 /* Drops trailing whitespace. Modifies the string in
1259 * place. Returns pointer to first non-space character */
1260
1261 s += strspn(s, WHITESPACE);
1262
1263 for (e = s; *e; e++)
1264 if (!strchr(WHITESPACE, *e))
1265 l = e;
1266
1267 if (l)
1268 *(l+1) = 0;
1269 else
1270 *s = 0;
1271
1272 return s;
4a72ff34
LP		 1273}
1274
ee9b5e01
LP		 1275char *delete_chars(char *s, const char *bad) {
1276 char *f, *t;
1277
1278 /* Drops all whitespace, regardless where in the string */
1279
1280 for (f = s, t = s; *f; f++) {
1281 if (strchr(bad, *f))
1282 continue;
1283
1284 *(t++) = *f;
1285 }
1286
1287 *t = 0;
1288
1289 return s;
1290}
1291
4a72ff34
LP		 1292char *file_in_same_dir(const char *path, const char *filename) {
1293 char *e, *r;
1294 size_t k;
1295
1296 assert(path);
1297 assert(filename);
1298
1299 /* This removes the last component of path and appends
1300 * filename, unless the latter is absolute anyway or the
1301 * former isn't */
1302
1303 if (path_is_absolute(filename))
1304 return strdup(filename);
1305
1306 if (!(e = strrchr(path, '/')))
1307 return strdup(filename);
1308
1309 k = strlen(filename);
1310 if (!(r = new(char, e-path+1+k+1)))
1311 return NULL;
1312
1313 memcpy(r, path, e-path+1);
1314 memcpy(r+(e-path)+1, filename, k+1);
1315
1316 return r;
1317}
fb624d04 1318
8c6db833
LP		 1319int safe_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) {
1320 struct stat st;
1321
56cf987f 1322 if (label_mkdir(path, mode) >= 0)
8c6db833
LP		 1323 if (chmod_and_chown(path, mode, uid, gid) < 0)
1324 return -errno;
1325
1326 if (lstat(path, &st) < 0)
1327 return -errno;
1328
1329 if ((st.st_mode & 0777) != mode ||
1330 st.st_uid != uid ||
1331 st.st_gid != gid ||
1332 !S_ISDIR(st.st_mode)) {
1333 errno = EEXIST;
1334 return -errno;
1335 }
1336
1337 return 0;
1338}
1339
1340
a9f5d454
LP		 1341int mkdir_parents(const char *path, mode_t mode) {
1342 const char *p, *e;
1343
1344 assert(path);
1345
1346 /* Creates every parent directory in the path except the last
1347 * component. */
1348
1349 p = path + strspn(path, "/");
1350 for (;;) {
1351 int r;
1352 char *t;
1353
1354 e = p + strcspn(p, "/");
1355 p = e + strspn(e, "/");
1356
1357 /* Is this the last component? If so, then we're
1358 * done */
1359 if (*p == 0)
1360 return 0;
1361
1362 if (!(t = strndup(path, e - path)))
1363 return -ENOMEM;
1364
56cf987f 1365 r = label_mkdir(t, mode);
a9f5d454
LP		 1366 free(t);
1367
1368 if (r < 0 && errno != EEXIST)
1369 return -errno;
1370 }
1371}
1372
bbd67135
LP		 1373int mkdir_p(const char *path, mode_t mode) {
1374 int r;
1375
1376 /* Like mkdir -p */
1377
1378 if ((r = mkdir_parents(path, mode)) < 0)
1379 return r;
1380
56cf987f 1381 if (label_mkdir(path, mode) < 0 && errno != EEXIST)
bbd67135
LP		 1382 return -errno;
1383
1384 return 0;
1385}
1386
c32dd69b
LP		 1387int rmdir_parents(const char *path, const char *stop) {
1388 size_t l;
1389 int r = 0;
1390
1391 assert(path);
1392 assert(stop);
1393
1394 l = strlen(path);
1395
1396 /* Skip trailing slashes */
1397 while (l > 0 && path[l-1] == '/')
1398 l--;
1399
1400 while (l > 0) {
1401 char *t;
1402
1403 /* Skip last component */
1404 while (l > 0 && path[l-1] != '/')
1405 l--;
1406
1407 /* Skip trailing slashes */
1408 while (l > 0 && path[l-1] == '/')
1409 l--;
1410
1411 if (l <= 0)
1412 break;
1413
1414 if (!(t = strndup(path, l)))
1415 return -ENOMEM;
1416
1417 if (path_startswith(stop, t)) {
1418 free(t);
1419 return 0;
1420 }
1421
1422 r = rmdir(t);
1423 free(t);
1424
1425 if (r < 0)
1426 if (errno != ENOENT)
1427 return -errno;
1428 }
1429
1430 return 0;
1431}
1432
1433
fb624d04
LP		 1434char hexchar(int x) {
1435 static const char table[16] = "0123456789abcdef";
1436
1437 return table[x & 15];
1438}
4fe88d28
LP		 1439
1440int unhexchar(char c) {
1441
1442 if (c >= '0' && c <= '9')
1443 return c - '0';
1444
1445 if (c >= 'a' && c <= 'f')
ea430986 1446 return c - 'a' + 10;
4fe88d28
LP		 1447
1448 if (c >= 'A' && c <= 'F')
ea430986 1449 return c - 'A' + 10;
4fe88d28
LP		 1450
1451 return -1;
1452}
1453
1454char octchar(int x) {
1455 return '0' + (x & 7);
1456}
1457
1458int unoctchar(char c) {
1459
1460 if (c >= '0' && c <= '7')
1461 return c - '0';
1462
1463 return -1;
1464}
1465
5af98f82
LP		 1466char decchar(int x) {
1467 return '0' + (x % 10);
1468}
1469
1470int undecchar(char c) {
1471
1472 if (c >= '0' && c <= '9')
1473 return c - '0';
1474
1475 return -1;
1476}
1477
4fe88d28
LP		 1478char *cescape(const char *s) {
1479 char *r, *t;
1480 const char *f;
1481
1482 assert(s);
1483
1484 /* Does C style string escaping. */
1485
1486 if (!(r = new(char, strlen(s)*4 + 1)))
1487 return NULL;
1488
1489 for (f = s, t = r; *f; f++)
1490
1491 switch (*f) {
1492
1493 case '\a':
1494 *(t++) = '\\';
1495 *(t++) = 'a';
1496 break;
1497 case '\b':
1498 *(t++) = '\\';
1499 *(t++) = 'b';
1500 break;
1501 case '\f':
1502 *(t++) = '\\';
1503 *(t++) = 'f';
1504 break;
1505 case '\n':
1506 *(t++) = '\\';
1507 *(t++) = 'n';
1508 break;
1509 case '\r':
1510 *(t++) = '\\';
1511 *(t++) = 'r';
1512 break;
1513 case '\t':
1514 *(t++) = '\\';
1515 *(t++) = 't';
1516 break;
1517 case '\v':
1518 *(t++) = '\\';
1519 *(t++) = 'v';
1520 break;
1521 case '\\':
1522 *(t++) = '\\';
1523 *(t++) = '\\';
1524 break;
1525 case '"':
1526 *(t++) = '\\';
1527 *(t++) = '"';
1528 break;
1529 case '\'':
1530 *(t++) = '\\';
1531 *(t++) = '\'';
1532 break;
1533
1534 default:
1535 /* For special chars we prefer octal over
1536 * hexadecimal encoding, simply because glib's
1537 * g_strescape() does the same */
1538 if ((*f < ' ') || (*f >= 127)) {
1539 *(t++) = '\\';
1540 *(t++) = octchar((unsigned char) *f >> 6);
1541 *(t++) = octchar((unsigned char) *f >> 3);
1542 *(t++) = octchar((unsigned char) *f);
1543 } else
1544 *(t++) = *f;
1545 break;
1546 }
1547
1548 *t = 0;
1549
1550 return r;
1551}
1552
6febfd0d 1553char *cunescape_length(const char *s, size_t length) {
4fe88d28
LP		 1554 char *r, *t;
1555 const char *f;
1556
1557 assert(s);
1558
1559 /* Undoes C style string escaping */
1560
6febfd0d 1561 if (!(r = new(char, length+1)))
4fe88d28
LP		 1562 return r;
1563
6febfd0d 1564 for (f = s, t = r; f < s + length; f++) {
4fe88d28
LP		 1565
1566 if (*f != '\\') {
1567 *(t++) = *f;
1568 continue;
1569 }
1570
1571 f++;
1572
1573 switch (*f) {
1574
1575 case 'a':
1576 *(t++) = '\a';
1577 break;
1578 case 'b':
1579 *(t++) = '\b';
1580 break;
1581 case 'f':
1582 *(t++) = '\f';
1583 break;
1584 case 'n':
1585 *(t++) = '\n';
1586 break;
1587 case 'r':
1588 *(t++) = '\r';
1589 break;
1590 case 't':
1591 *(t++) = '\t';
1592 break;
1593 case 'v':
1594 *(t++) = '\v';
1595 break;
1596 case '\\':
1597 *(t++) = '\\';
1598 break;
1599 case '"':
1600 *(t++) = '"';
1601 break;
1602 case '\'':
1603 *(t++) = '\'';
1604 break;
1605
e167fb86
LP		 1606 case 's':
1607 /* This is an extension of the XDG syntax files */
1608 *(t++) = ' ';
1609 break;
1610
4fe88d28
LP		 1611 case 'x': {
1612 /* hexadecimal encoding */
1613 int a, b;
1614
1615 if ((a = unhexchar(f[1])) < 0 ||
1616 (b = unhexchar(f[2])) < 0) {
1617 /* Invalid escape code, let's take it literal then */
1618 *(t++) = '\\';
1619 *(t++) = 'x';
1620 } else {
1621 *(t++) = (char) ((a << 4) | b);
1622 f += 2;
1623 }
1624
1625 break;
1626 }
1627
1628 case '0':
1629 case '1':
1630 case '2':
1631 case '3':
1632 case '4':
1633 case '5':
1634 case '6':
1635 case '7': {
1636 /* octal encoding */
1637 int a, b, c;
1638
1639 if ((a = unoctchar(f[0])) < 0 ||
1640 (b = unoctchar(f[1])) < 0 ||
1641 (c = unoctchar(f[2])) < 0) {
1642 /* Invalid escape code, let's take it literal then */
1643 *(t++) = '\\';
1644 *(t++) = f[0];
1645 } else {
1646 *(t++) = (char) ((a << 6) | (b << 3) | c);
1647 f += 2;
1648 }
1649
1650 break;
1651 }
1652
1653 case 0:
1654 /* premature end of string.*/
1655 *(t++) = '\\';
1656 goto finish;
1657
1658 default:
1659 /* Invalid escape code, let's take it literal then */
1660 *(t++) = '\\';
f3d4cc01 1661 *(t++) = *f;
4fe88d28
LP		 1662 break;
1663 }
1664 }
1665
1666finish:
1667 *t = 0;
1668 return r;
1669}
1670
6febfd0d
LP		 1671char *cunescape(const char *s) {
1672 return cunescape_length(s, strlen(s));
1673}
4fe88d28
LP		 1674
1675char *xescape(const char *s, const char *bad) {
1676 char *r, *t;
1677 const char *f;
1678
1679 /* Escapes all chars in bad, in addition to \ and all special
1680 * chars, in \xFF style escaping. May be reversed with
1681 * cunescape. */
1682
1683 if (!(r = new(char, strlen(s)*4+1)))
1684 return NULL;
1685
1686 for (f = s, t = r; *f; f++) {
1687
b866264a
LP		 1688 if ((*f < ' ') || (*f >= 127) ||
1689 (*f == '\\') || strchr(bad, *f)) {
4fe88d28
LP		 1690 *(t++) = '\\';
1691 *(t++) = 'x';
1692 *(t++) = hexchar(*f >> 4);
1693 *(t++) = hexchar(*f);
1694 } else
1695 *(t++) = *f;
1696 }
1697
1698 *t = 0;
1699
1700 return r;
1701}
1702
ea430986 1703char *bus_path_escape(const char *s) {
ea430986
LP		 1704 char *r, *t;
1705 const char *f;
1706
47be870b
LP		 1707 assert(s);
1708
ea430986
LP		 1709 /* Escapes all chars that D-Bus' object path cannot deal
1710 * with. Can be reverse with bus_path_unescape() */
1711
1712 if (!(r = new(char, strlen(s)*3+1)))
1713 return NULL;
1714
1715 for (f = s, t = r; *f; f++) {
1716
1717 if (!(*f >= 'A' && *f <= 'Z') &&
1718 !(*f >= 'a' && *f <= 'z') &&
1719 !(*f >= '0' && *f <= '9')) {
1720 *(t++) = '_';
1721 *(t++) = hexchar(*f >> 4);
1722 *(t++) = hexchar(*f);
1723 } else
1724 *(t++) = *f;
1725 }
1726
1727 *t = 0;
1728
1729 return r;
1730}
1731
9e2f7c11 1732char *bus_path_unescape(const char *f) {
ea430986 1733 char *r, *t;
ea430986 1734
9e2f7c11 1735 assert(f);
47be870b 1736
9e2f7c11 1737 if (!(r = strdup(f)))
ea430986
LP		 1738 return NULL;
1739
9e2f7c11 1740 for (t = r; *f; f++) {
ea430986
LP		 1741
1742 if (*f == '_') {
1743 int a, b;
1744
1745 if ((a = unhexchar(f[1])) < 0 ||
1746 (b = unhexchar(f[2])) < 0) {
1747 /* Invalid escape code, let's take it literal then */
1748 *(t++) = '_';
1749 } else {
1750 *(t++) = (char) ((a << 4) | b);
1751 f += 2;
1752 }
1753 } else
1754 *(t++) = *f;
1755 }
1756
1757 *t = 0;
1758
1759 return r;
1760}
1761
4fe88d28
LP		 1762char *path_kill_slashes(char *path) {
1763 char *f, *t;
1764 bool slash = false;
1765
1766 /* Removes redundant inner and trailing slashes. Modifies the
1767 * passed string in-place.
1768 *
1769 * ///foo///bar/ becomes /foo/bar
1770 */
1771
1772 for (f = path, t = path; *f; f++) {
1773
1774 if (*f == '/') {
1775 slash = true;
1776 continue;
1777 }
1778
1779 if (slash) {
1780 slash = false;
1781 *(t++) = '/';
1782 }
1783
1784 *(t++) = *f;
1785 }
1786
1787 /* Special rule, if we are talking of the root directory, a
1788 trailing slash is good */
1789
1790 if (t == path && slash)
1791 *(t++) = '/';
1792
1793 *t = 0;
1794 return path;
1795}
1796
1797bool path_startswith(const char *path, const char *prefix) {
1798 assert(path);
1799 assert(prefix);
1800
1801 if ((path[0] == '/') != (prefix[0] == '/'))
1802 return false;
1803
1804 for (;;) {
1805 size_t a, b;
1806
1807 path += strspn(path, "/");
1808 prefix += strspn(prefix, "/");
1809
1810 if (*prefix == 0)
1811 return true;
1812
1813 if (*path == 0)
1814 return false;
1815
1816 a = strcspn(path, "/");
1817 b = strcspn(prefix, "/");
1818
1819 if (a != b)
1820 return false;
1821
1822 if (memcmp(path, prefix, a) != 0)
1823 return false;
1824
1825 path += a;
1826 prefix += b;
1827 }
1828}
1829
15ae422b
LP		 1830bool path_equal(const char *a, const char *b) {
1831 assert(a);
1832 assert(b);
1833
1834 if ((a[0] == '/') != (b[0] == '/'))
1835 return false;
1836
1837 for (;;) {
1838 size_t j, k;
1839
1840 a += strspn(a, "/");
1841 b += strspn(b, "/");
1842
1843 if (*a == 0 && *b == 0)
1844 return true;
1845
1846 if (*a == 0 || *b == 0)
1847 return false;
1848
1849 j = strcspn(a, "/");
1850 k = strcspn(b, "/");
1851
1852 if (j != k)
1853 return false;
1854
1855 if (memcmp(a, b, j) != 0)
1856 return false;
1857
1858 a += j;
1859 b += k;
1860 }
1861}
1862
67d51650 1863char *ascii_strlower(char *t) {
4fe88d28
LP		 1864 char *p;
1865
67d51650 1866 assert(t);
4fe88d28 1867
67d51650 1868 for (p = t; *p; p++)
4fe88d28
LP		 1869 if (*p >= 'A' && *p <= 'Z')
1870 *p = *p - 'A' + 'a';
1871
67d51650 1872 return t;
4fe88d28 1873}
1dccbe19 1874
c85dc17b
LP		 1875bool ignore_file(const char *filename) {
1876 assert(filename);
1877
1878 return
1879 filename[0] == '.' ||
6c78be3c 1880 streq(filename, "lost+found") ||
e472d476
LP		 1881 streq(filename, "aquota.user") ||
1882 streq(filename, "aquota.group") ||
c85dc17b
LP		 1883 endswith(filename, "~") ||
1884 endswith(filename, ".rpmnew") ||
1885 endswith(filename, ".rpmsave") ||
1886 endswith(filename, ".rpmorig") ||
1887 endswith(filename, ".dpkg-old") ||
1888 endswith(filename, ".dpkg-new") ||
1889 endswith(filename, ".swp");
1890}
1891
3a0ecb08
LP		 1892int fd_nonblock(int fd, bool nonblock) {
1893 int flags;
1894
1895 assert(fd >= 0);
1896
1897 if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
1898 return -errno;
1899
1900 if (nonblock)
1901 flags |= O_NONBLOCK;
1902 else
1903 flags &= ~O_NONBLOCK;
1904
1905 if (fcntl(fd, F_SETFL, flags) < 0)
1906 return -errno;
1907
1908 return 0;
1909}
1910
1911int fd_cloexec(int fd, bool cloexec) {
1912 int flags;
1913
1914 assert(fd >= 0);
1915
1916 if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
1917 return -errno;
1918
1919 if (cloexec)
1920 flags |= FD_CLOEXEC;
1921 else
1922 flags &= ~FD_CLOEXEC;
1923
1924 if (fcntl(fd, F_SETFD, flags) < 0)
1925 return -errno;
1926
1927 return 0;
1928}
1929
a0d40ac5
LP		 1930int close_all_fds(const int except[], unsigned n_except) {
1931 DIR *d;
1932 struct dirent *de;
1933 int r = 0;
1934
1935 if (!(d = opendir("/proc/self/fd")))
1936 return -errno;
1937
1938 while ((de = readdir(d))) {
a7610064 1939 int fd = -1;
a0d40ac5 1940
a16e1123 1941 if (ignore_file(de->d_name))
a0d40ac5
LP		 1942 continue;
1943
720ce21d
LP		 1944 if (safe_atoi(de->d_name, &fd) < 0)
1945 /* Let's better ignore this, just in case */
1946 continue;
a0d40ac5
LP		 1947
1948 if (fd < 3)
1949 continue;
1950
1951 if (fd == dirfd(d))
1952 continue;
1953
1954 if (except) {
1955 bool found;
1956 unsigned i;
1957
1958 found = false;
1959 for (i = 0; i < n_except; i++)
1960 if (except[i] == fd) {
1961 found = true;
1962 break;
1963 }
1964
1965 if (found)
1966 continue;
1967 }
1968
720ce21d 1969 if (close_nointr(fd) < 0) {
2f357920 1970 /* Valgrind has its own FD and doesn't want to have it closed */
720ce21d
LP		 1971 if (errno != EBADF && r == 0)
1972 r = -errno;
2f357920 1973 }
a0d40ac5
LP		 1974 }
1975
a0d40ac5
LP		 1976 closedir(d);
1977 return r;
1978}
1979
db12775d
LP		 1980bool chars_intersect(const char *a, const char *b) {
1981 const char *p;
1982
1983 /* Returns true if any of the chars in a are in b. */
1984 for (p = a; *p; p++)
1985 if (strchr(b, *p))
1986 return true;
1987
1988 return false;
1989}
1990
8b6c7120
LP		 1991char *format_timestamp(char *buf, size_t l, usec_t t) {
1992 struct tm tm;
1993 time_t sec;
1994
1995 assert(buf);
1996 assert(l > 0);
1997
1998 if (t <= 0)
1999 return NULL;
2000
f872ec33 2001 sec = (time_t) (t / USEC_PER_SEC);
8b6c7120
LP		 2002
2003 if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
2004 return NULL;
2005
2006 return buf;
2007}
2008
584be568
LP		 2009char *format_timestamp_pretty(char *buf, size_t l, usec_t t) {
2010 usec_t n, d;
2011
2012 n = now(CLOCK_REALTIME);
2013
2014 if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t)
2015 return NULL;
2016
2017 d = n - t;
2018
2019 if (d >= USEC_PER_YEAR)
2020 snprintf(buf, l, "%llu years and %llu months ago",
2021 (unsigned long long) (d / USEC_PER_YEAR),
2022 (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH));
2023 else if (d >= USEC_PER_MONTH)
2024 snprintf(buf, l, "%llu months and %llu days ago",
2025 (unsigned long long) (d / USEC_PER_MONTH),
2026 (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY));
2027 else if (d >= USEC_PER_WEEK)
2028 snprintf(buf, l, "%llu weeks and %llu days ago",
2029 (unsigned long long) (d / USEC_PER_WEEK),
2030 (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY));
2031 else if (d >= 2*USEC_PER_DAY)
2032 snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY));
2033 else if (d >= 25*USEC_PER_HOUR)
2034 snprintf(buf, l, "1 day and %lluh ago",
2035 (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR));
2036 else if (d >= 6*USEC_PER_HOUR)
2037 snprintf(buf, l, "%lluh ago",
2038 (unsigned long long) (d / USEC_PER_HOUR));
2039 else if (d >= USEC_PER_HOUR)
2040 snprintf(buf, l, "%lluh %llumin ago",
2041 (unsigned long long) (d / USEC_PER_HOUR),
2042 (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE));
2043 else if (d >= 5*USEC_PER_MINUTE)
2044 snprintf(buf, l, "%llumin ago",
2045 (unsigned long long) (d / USEC_PER_MINUTE));
2046 else if (d >= USEC_PER_MINUTE)
2047 snprintf(buf, l, "%llumin %llus ago",
2048 (unsigned long long) (d / USEC_PER_MINUTE),
2049 (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC));
2050 else if (d >= USEC_PER_SEC)
2051 snprintf(buf, l, "%llus ago",
2052 (unsigned long long) (d / USEC_PER_SEC));
2053 else if (d >= USEC_PER_MSEC)
2054 snprintf(buf, l, "%llums ago",
2055 (unsigned long long) (d / USEC_PER_MSEC));
2056 else if (d > 0)
2057 snprintf(buf, l, "%lluus ago",
2058 (unsigned long long) d);
2059 else
2060 snprintf(buf, l, "now");
2061
2062 buf[l-1] = 0;
2063 return buf;
2064}
2065
871d7de4
LP		 2066char *format_timespan(char *buf, size_t l, usec_t t) {
2067 static const struct {
2068 const char *suffix;
2069 usec_t usec;
2070 } table[] = {
2071 { "w", USEC_PER_WEEK },
2072 { "d", USEC_PER_DAY },
2073 { "h", USEC_PER_HOUR },
2074 { "min", USEC_PER_MINUTE },
2075 { "s", USEC_PER_SEC },
2076 { "ms", USEC_PER_MSEC },
2077 { "us", 1 },
2078 };
2079
2080 unsigned i;
2081 char *p = buf;
2082
2083 assert(buf);
2084 assert(l > 0);
2085
2086 if (t == (usec_t) -1)
2087 return NULL;
2088
4502d22c
LP		 2089 if (t == 0) {
2090 snprintf(p, l, "0");
2091 p[l-1] = 0;
2092 return p;
2093 }
2094
871d7de4
LP		 2095 /* The result of this function can be parsed with parse_usec */
2096
2097 for (i = 0; i < ELEMENTSOF(table); i++) {
2098 int k;
2099 size_t n;
2100
2101 if (t < table[i].usec)
2102 continue;
2103
2104 if (l <= 1)
2105 break;
2106
2107 k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix);
2108 n = MIN((size_t) k, l);
2109
2110 l -= n;
2111 p += n;
2112
2113 t %= table[i].usec;
2114 }
2115
2116 *p = 0;
2117
2118 return buf;
2119}
2120
42856c10
LP		 2121bool fstype_is_network(const char *fstype) {
2122 static const char * const table[] = {
2123 "cifs",
2124 "smbfs",
2125 "ncpfs",
2126 "nfs",
ca139f94
LP		 2127 "nfs4",
2128 "gfs",
2129 "gfs2"
42856c10
LP		 2130 };
2131
2132 unsigned i;
2133
2134 for (i = 0; i < ELEMENTSOF(table); i++)
2135 if (streq(table[i], fstype))
2136 return true;
2137
2138 return false;
2139}
2140
601f6a1e
LP		 2141int chvt(int vt) {
2142 int fd, r = 0;
2143
2144 if ((fd = open("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
2145 return -errno;
2146
2147 if (vt < 0) {
2148 int tiocl[2] = {
2149 TIOCL_GETKMSGREDIRECT,
2150 0
2151 };
2152
2153 if (ioctl(fd, TIOCLINUX, tiocl) < 0)
2154 return -errno;
2155
2156 vt = tiocl[0] <= 0 ? 1 : tiocl[0];
2157 }
2158
2159 if (ioctl(fd, VT_ACTIVATE, vt) < 0)
2160 r = -errno;
2161
a16e1123 2162 close_nointr_nofail(r);
601f6a1e
LP		 2163 return r;
2164}
2165
80876c20
LP		 2166int read_one_char(FILE *f, char *ret, bool *need_nl) {
2167 struct termios old_termios, new_termios;
2168 char c;
20c03b7b 2169 char line[LINE_MAX];
80876c20
LP		 2170
2171 assert(f);
2172 assert(ret);
2173
2174 if (tcgetattr(fileno(f), &old_termios) >= 0) {
2175 new_termios = old_termios;
2176
2177 new_termios.c_lflag &= ~ICANON;
2178 new_termios.c_cc[VMIN] = 1;
2179 new_termios.c_cc[VTIME] = 0;
2180
2181 if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
2182 size_t k;
2183
2184 k = fread(&c, 1, 1, f);
2185
2186 tcsetattr(fileno(f), TCSADRAIN, &old_termios);
2187
2188 if (k <= 0)
2189 return -EIO;
2190
2191 if (need_nl)
2192 *need_nl = c != '\n';
2193
2194 *ret = c;
2195 return 0;
2196 }
2197 }
2198
2199 if (!(fgets(line, sizeof(line), f)))
2200 return -EIO;
2201
2202 truncate_nl(line);
2203
2204 if (strlen(line) != 1)
2205 return -EBADMSG;
2206
2207 if (need_nl)
2208 *need_nl = false;
2209
2210 *ret = line[0];
2211 return 0;
2212}
2213
2214int ask(char *ret, const char *replies, const char *text, ...) {
1b39d4b9
LP		 2215 bool on_tty;
2216
80876c20
LP		 2217 assert(ret);
2218 assert(replies);
2219 assert(text);
2220
1b39d4b9
LP		 2221 on_tty = isatty(STDOUT_FILENO);
2222
80876c20
LP		 2223 for (;;) {
2224 va_list ap;
2225 char c;
2226 int r;
2227 bool need_nl = true;
2228
1b39d4b9
LP		 2229 if (on_tty)
2230 fputs("\x1B[1m", stdout);
b1b2dc0c 2231
80876c20
LP		 2232 va_start(ap, text);
2233 vprintf(text, ap);
2234 va_end(ap);
2235
1b39d4b9
LP		 2236 if (on_tty)
2237 fputs("\x1B[0m", stdout);
b1b2dc0c 2238
80876c20
LP		 2239 fflush(stdout);
2240
2241 if ((r = read_one_char(stdin, &c, &need_nl)) < 0) {
2242
2243 if (r == -EBADMSG) {
2244 puts("Bad input, please try again.");
2245 continue;
2246 }
2247
2248 putchar('\n');
2249 return r;
2250 }
2251
2252 if (need_nl)
2253 putchar('\n');
2254
2255 if (strchr(replies, c)) {
2256 *ret = c;
2257 return 0;
2258 }
2259
2260 puts("Read unexpected character, please try again.");
2261 }
2262}
2263
2264int reset_terminal(int fd) {
2265 struct termios termios;
2266 int r = 0;
3fe5e5d4
LP		 2267 long arg;
2268
2269 /* Set terminal to some sane defaults */
80876c20
LP		 2270
2271 assert(fd >= 0);
2272
eed1d0e3
LP		 2273 /* We leave locked terminal attributes untouched, so that
2274 * Plymouth may set whatever it wants to set, and we don't
2275 * interfere with that. */
3fe5e5d4
LP		 2276
2277 /* Disable exclusive mode, just in case */
2278 ioctl(fd, TIOCNXCL);
2279
2280 /* Enable console unicode mode */
2281 arg = K_UNICODE;
2282 ioctl(fd, KDSKBMODE, &arg);
80876c20
LP		 2283
2284 if (tcgetattr(fd, &termios) < 0) {
2285 r = -errno;
2286 goto finish;
2287 }
2288
aaf694ca
LP		 2289 /* We only reset the stuff that matters to the software. How
2290 * hardware is set up we don't touch assuming that somebody
2291 * else will do that for us */
2292
2293 termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
80876c20
LP		 2294 termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
2295 termios.c_oflag |= ONLCR;
2296 termios.c_cflag |= CREAD;
2297 termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
2298
2299 termios.c_cc[VINTR] = 03; /* ^C */
2300 termios.c_cc[VQUIT] = 034; /* ^\ */
2301 termios.c_cc[VERASE] = 0177;
2302 termios.c_cc[VKILL] = 025; /* ^X */
2303 termios.c_cc[VEOF] = 04; /* ^D */
2304 termios.c_cc[VSTART] = 021; /* ^Q */
2305 termios.c_cc[VSTOP] = 023; /* ^S */
2306 termios.c_cc[VSUSP] = 032; /* ^Z */
2307 termios.c_cc[VLNEXT] = 026; /* ^V */
2308 termios.c_cc[VWERASE] = 027; /* ^W */
2309 termios.c_cc[VREPRINT] = 022; /* ^R */
aaf694ca
LP		 2310 termios.c_cc[VEOL] = 0;
2311 termios.c_cc[VEOL2] = 0;
80876c20
LP		 2312
2313 termios.c_cc[VTIME] = 0;
2314 termios.c_cc[VMIN] = 1;
2315
2316 if (tcsetattr(fd, TCSANOW, &termios) < 0)
2317 r = -errno;
2318
2319finish:
2320 /* Just in case, flush all crap out */
2321 tcflush(fd, TCIOFLUSH);
2322
2323 return r;
2324}
2325
2326int open_terminal(const char *name, int mode) {
2327 int fd, r;
f73f76ac 2328 unsigned c = 0;
80876c20 2329
f73f76ac
LP		 2330 /*
2331 * If a TTY is in the process of being closed opening it might
2332 * cause EIO. This is horribly awful, but unlikely to be
2333 * changed in the kernel. Hence we work around this problem by
2334 * retrying a couple of times.
2335 *
2336 * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245
2337 */
2338
2339 for (;;) {
2340 if ((fd = open(name, mode)) >= 0)
2341 break;
2342
2343 if (errno != EIO)
2344 return -errno;
2345
2346 if (c >= 20)
2347 return -errno;
2348
2349 usleep(50 * USEC_PER_MSEC);
2350 c++;
2351 }
2352
2353 if (fd < 0)
80876c20
LP		 2354 return -errno;
2355
2356 if ((r = isatty(fd)) < 0) {
2357 close_nointr_nofail(fd);
2358 return -errno;
2359 }
2360
2361 if (!r) {
2362 close_nointr_nofail(fd);
2363 return -ENOTTY;
2364 }
2365
2366 return fd;
2367}
2368
2369int flush_fd(int fd) {
2370 struct pollfd pollfd;
2371
2372 zero(pollfd);
2373 pollfd.fd = fd;
2374 pollfd.events = POLLIN;
2375
2376 for (;;) {
20c03b7b 2377 char buf[LINE_MAX];
80876c20
LP		 2378 ssize_t l;
2379 int r;
2380
2381 if ((r = poll(&pollfd, 1, 0)) < 0) {
2382
2383 if (errno == EINTR)
2384 continue;
2385
2386 return -errno;
2387 }
2388
2389 if (r == 0)
2390 return 0;
2391
2392 if ((l = read(fd, buf, sizeof(buf))) < 0) {
2393
2394 if (errno == EINTR)
2395 continue;
2396
2397 if (errno == EAGAIN)
2398 return 0;
2399
2400 return -errno;
2401 }
2402
2403 if (l <= 0)
2404 return 0;
2405 }
2406}
2407
21de3988 2408int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm) {
bab45044 2409 int fd = -1, notify = -1, r, wd = -1;
80876c20
LP		 2410
2411 assert(name);
2412
2413 /* We use inotify to be notified when the tty is closed. We
2414 * create the watch before checking if we can actually acquire
2415 * it, so that we don't lose any event.
2416 *
2417 * Note: strictly speaking this actually watches for the
2418 * device being closed, it does *not* really watch whether a
2419 * tty loses its controlling process. However, unless some
2420 * rogue process uses TIOCNOTTY on /dev/tty *after* closing
2421 * its tty otherwise this will not become a problem. As long
2422 * as the administrator makes sure not configure any service
2423 * on the same tty as an untrusted user this should not be a
2424 * problem. (Which he probably should not do anyway.) */
2425
2426 if (!fail && !force) {
2427 if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
2428 r = -errno;
2429 goto fail;
2430 }
2431
2432 if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) {
2433 r = -errno;
2434 goto fail;
2435 }
2436 }
2437
2438 for (;;) {
e3d1855b
LP		 2439 if (notify >= 0)
2440 if ((r = flush_fd(notify)) < 0)
2441 goto fail;
80876c20
LP		 2442
2443 /* We pass here O_NOCTTY only so that we can check the return
2444 * value TIOCSCTTY and have a reliable way to figure out if we
2445 * successfully became the controlling process of the tty */
2446 if ((fd = open_terminal(name, O_RDWR|O_NOCTTY)) < 0)
2447 return -errno;
2448
2449 /* First, try to get the tty */
21de3988
LP		 2450 r = ioctl(fd, TIOCSCTTY, force);
2451
2452 /* Sometimes it makes sense to ignore TIOCSCTTY
2453 * returning EPERM, i.e. when very likely we already
2454 * are have this controlling terminal. */
2455 if (r < 0 && errno == EPERM && ignore_tiocstty_eperm)
2456 r = 0;
2457
2458 if (r < 0 && (force || fail || errno != EPERM)) {
80876c20
LP		 2459 r = -errno;
2460 goto fail;
2461 }
2462
2463 if (r >= 0)
2464 break;
2465
2466 assert(!fail);
2467 assert(!force);
2468 assert(notify >= 0);
2469
2470 for (;;) {
f601daa7 2471 uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX];
80876c20 2472 ssize_t l;
f601daa7 2473 struct inotify_event *e;
80876c20 2474
f601daa7 2475 if ((l = read(notify, &inotify_buffer, sizeof(inotify_buffer))) < 0) {
80876c20 2476
f601daa7
LP		 2477 if (errno == EINTR)
2478 continue;
2479
2480 r = -errno;
2481 goto fail;
2482 }
2483
2484 e = (struct inotify_event*) inotify_buffer;
80876c20 2485
f601daa7
LP		 2486 while (l > 0) {
2487 size_t step;
80876c20 2488
f601daa7 2489 if (e->wd != wd || !(e->mask & IN_CLOSE)) {
80876c20 2490 r = -EIO;
f601daa7
LP		 2491 goto fail;
2492 }
80876c20 2493
f601daa7
LP		 2494 step = sizeof(struct inotify_event) + e->len;
2495 assert(step <= (size_t) l);
80876c20 2496
f601daa7
LP		 2497 e = (struct inotify_event*) ((uint8_t*) e + step);
2498 l -= step;
80876c20
LP		 2499 }
2500
2501 break;
2502 }
2503
2504 /* We close the tty fd here since if the old session
2505 * ended our handle will be dead. It's important that
2506 * we do this after sleeping, so that we don't enter
2507 * an endless loop. */
2508 close_nointr_nofail(fd);
2509 }
2510
2511 if (notify >= 0)
a16e1123 2512 close_nointr_nofail(notify);
80876c20
LP		 2513
2514 if ((r = reset_terminal(fd)) < 0)
2515 log_warning("Failed to reset terminal: %s", strerror(-r));
2516
2517 return fd;
2518
2519fail:
2520 if (fd >= 0)
a16e1123 2521 close_nointr_nofail(fd);
80876c20
LP		 2522
2523 if (notify >= 0)
a16e1123 2524 close_nointr_nofail(notify);
80876c20
LP		 2525
2526 return r;
2527}
2528
2529int release_terminal(void) {
2530 int r = 0, fd;
57cd2192 2531 struct sigaction sa_old, sa_new;
80876c20 2532
57cd2192 2533 if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY)) < 0)
80876c20
LP		 2534 return -errno;
2535
57cd2192
LP		 2536 /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
2537 * by our own TIOCNOTTY */
2538
2539 zero(sa_new);
2540 sa_new.sa_handler = SIG_IGN;
2541 sa_new.sa_flags = SA_RESTART;
2542 assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
2543
80876c20
LP		 2544 if (ioctl(fd, TIOCNOTTY) < 0)
2545 r = -errno;
2546
57cd2192
LP		 2547 assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
2548
80876c20
LP		 2549 close_nointr_nofail(fd);
2550 return r;
2551}
2552
9a34ec5f
LP		 2553int sigaction_many(const struct sigaction *sa, ...) {
2554 va_list ap;
2555 int r = 0, sig;
2556
2557 va_start(ap, sa);
2558 while ((sig = va_arg(ap, int)) > 0)
2559 if (sigaction(sig, sa, NULL) < 0)
2560 r = -errno;
2561 va_end(ap);
2562
2563 return r;
2564}
2565
2566int ignore_signals(int sig, ...) {
a337c6fc 2567 struct sigaction sa;
9a34ec5f
LP		 2568 va_list ap;
2569 int r = 0;
a337c6fc
LP		 2570
2571 zero(sa);
2572 sa.sa_handler = SIG_IGN;
2573 sa.sa_flags = SA_RESTART;
2574
9a34ec5f
LP		 2575 if (sigaction(sig, &sa, NULL) < 0)
2576 r = -errno;
2577
2578 va_start(ap, sig);
2579 while ((sig = va_arg(ap, int)) > 0)
2580 if (sigaction(sig, &sa, NULL) < 0)
2581 r = -errno;
2582 va_end(ap);
2583
2584 return r;
2585}
2586
2587int default_signals(int sig, ...) {
2588 struct sigaction sa;
2589 va_list ap;
2590 int r = 0;
2591
2592 zero(sa);
2593 sa.sa_handler = SIG_DFL;
2594 sa.sa_flags = SA_RESTART;
2595
2596 if (sigaction(sig, &sa, NULL) < 0)
2597 r = -errno;
2598
2599 va_start(ap, sig);
2600 while ((sig = va_arg(ap, int)) > 0)
2601 if (sigaction(sig, &sa, NULL) < 0)
2602 r = -errno;
2603 va_end(ap);
2604
2605 return r;
a337c6fc
LP		 2606}
2607
8d567588
LP		 2608int close_pipe(int p[]) {
2609 int a = 0, b = 0;
2610
2611 assert(p);
2612
2613 if (p[0] >= 0) {
2614 a = close_nointr(p[0]);
2615 p[0] = -1;
2616 }
2617
2618 if (p[1] >= 0) {
2619 b = close_nointr(p[1]);
2620 p[1] = -1;
2621 }
2622
2623 return a < 0 ? a : b;
2624}
2625
eb22ac37 2626ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
8d567588
LP		 2627 uint8_t *p;
2628 ssize_t n = 0;
2629
2630 assert(fd >= 0);
2631 assert(buf);
2632
2633 p = buf;
2634
2635 while (nbytes > 0) {
2636 ssize_t k;
2637
2638 if ((k = read(fd, p, nbytes)) <= 0) {
2639
eb22ac37 2640 if (k < 0 && errno == EINTR)
8d567588
LP		 2641 continue;
2642
eb22ac37 2643 if (k < 0 && errno == EAGAIN && do_poll) {
8d567588
LP		 2644 struct pollfd pollfd;
2645
2646 zero(pollfd);
2647 pollfd.fd = fd;
2648 pollfd.events = POLLIN;
2649
2650 if (poll(&pollfd, 1, -1) < 0) {
2651 if (errno == EINTR)
2652 continue;
2653
2654 return n > 0 ? n : -errno;
2655 }
2656
2657 if (pollfd.revents != POLLIN)
2658 return n > 0 ? n : -EIO;
2659
2660 continue;
2661 }
2662
2663 return n > 0 ? n : (k < 0 ? -errno : 0);
2664 }
2665
2666 p += k;
2667 nbytes -= k;
2668 n += k;
2669 }
2670
2671 return n;
2672}
2673
eb22ac37
LP		 2674ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
2675 const uint8_t *p;
2676 ssize_t n = 0;
2677
2678 assert(fd >= 0);
2679 assert(buf);
2680
2681 p = buf;
2682
2683 while (nbytes > 0) {
2684 ssize_t k;
2685
2686 if ((k = write(fd, p, nbytes)) <= 0) {
2687
2688 if (k < 0 && errno == EINTR)
2689 continue;
2690
2691 if (k < 0 && errno == EAGAIN && do_poll) {
2692 struct pollfd pollfd;
2693
2694 zero(pollfd);
2695 pollfd.fd = fd;
2696 pollfd.events = POLLOUT;
2697
2698 if (poll(&pollfd, 1, -1) < 0) {
2699 if (errno == EINTR)
2700 continue;
2701
2702 return n > 0 ? n : -errno;
2703 }
2704
2705 if (pollfd.revents != POLLOUT)
2706 return n > 0 ? n : -EIO;
2707
2708 continue;
2709 }
2710
2711 return n > 0 ? n : (k < 0 ? -errno : 0);
2712 }
2713
2714 p += k;
2715 nbytes -= k;
2716 n += k;
2717 }
2718
2719 return n;
2720}
2721
8d567588
LP		 2722int path_is_mount_point(const char *t) {
2723 struct stat a, b;
35d2e7ec
LP		 2724 char *parent;
2725 int r;
8d567588
LP		 2726
2727 if (lstat(t, &a) < 0) {
8d567588
LP		 2728 if (errno == ENOENT)
2729 return 0;
2730
2731 return -errno;
2732 }
2733
35d2e7ec
LP		 2734 if ((r = parent_of_path(t, &parent)) < 0)
2735 return r;
8d567588 2736
35d2e7ec
LP		 2737 r = lstat(parent, &b);
2738 free(parent);
8d567588 2739
35d2e7ec
LP		 2740 if (r < 0)
2741 return -errno;
8d567588
LP		 2742
2743 return a.st_dev != b.st_dev;
2744}
2745
24a6e4a4
LP		 2746int parse_usec(const char *t, usec_t *usec) {
2747 static const struct {
2748 const char *suffix;
2749 usec_t usec;
2750 } table[] = {
2751 { "sec", USEC_PER_SEC },
2752 { "s", USEC_PER_SEC },
2753 { "min", USEC_PER_MINUTE },
2754 { "hr", USEC_PER_HOUR },
2755 { "h", USEC_PER_HOUR },
2756 { "d", USEC_PER_DAY },
2757 { "w", USEC_PER_WEEK },
2758 { "msec", USEC_PER_MSEC },
2759 { "ms", USEC_PER_MSEC },
2760 { "m", USEC_PER_MINUTE },
2761 { "usec", 1ULL },
2762 { "us", 1ULL },
2763 { "", USEC_PER_SEC },
2764 };
2765
2766 const char *p;
2767 usec_t r = 0;
2768
2769 assert(t);
2770 assert(usec);
2771
2772 p = t;
2773 do {
2774 long long l;
2775 char *e;
2776 unsigned i;
2777
2778 errno = 0;
2779 l = strtoll(p, &e, 10);
2780
2781 if (errno != 0)
2782 return -errno;
2783
2784 if (l < 0)
2785 return -ERANGE;
2786
2787 if (e == p)
2788 return -EINVAL;
2789
2790 e += strspn(e, WHITESPACE);
2791
2792 for (i = 0; i < ELEMENTSOF(table); i++)
2793 if (startswith(e, table[i].suffix)) {
2794 r += (usec_t) l * table[i].usec;
2795 p = e + strlen(table[i].suffix);
2796 break;
2797 }
2798
2799 if (i >= ELEMENTSOF(table))
2800 return -EINVAL;
2801
2802 } while (*p != 0);
2803
2804 *usec = r;
2805
2806 return 0;
2807}
2808
843d2643
LP		 2809int make_stdio(int fd) {
2810 int r, s, t;
2811
2812 assert(fd >= 0);
2813
2814 r = dup2(fd, STDIN_FILENO);
2815 s = dup2(fd, STDOUT_FILENO);
2816 t = dup2(fd, STDERR_FILENO);
2817
2818 if (fd >= 3)
2819 close_nointr_nofail(fd);
2820
2821 if (r < 0 || s < 0 || t < 0)
2822 return -errno;
2823
2824 return 0;
2825}
2826
ade509ce
LP		 2827int make_null_stdio(void) {
2828 int null_fd;
2829
2830 if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0)
2831 return -errno;
2832
2833 return make_stdio(null_fd);
2834}
2835
8407a5d0
LP		 2836bool is_device_path(const char *path) {
2837
2838 /* Returns true on paths that refer to a device, either in
2839 * sysfs or in /dev */
2840
2841 return
2842 path_startswith(path, "/dev/") ||
2843 path_startswith(path, "/sys/");
2844}
2845
01f78473
LP		 2846int dir_is_empty(const char *path) {
2847 DIR *d;
2848 int r;
2849 struct dirent buf, *de;
2850
2851 if (!(d = opendir(path)))
2852 return -errno;
2853
2854 for (;;) {
2855 if ((r = readdir_r(d, &buf, &de)) > 0) {
2856 r = -r;
2857 break;
2858 }
2859
2860 if (!de) {
2861 r = 1;
2862 break;
2863 }
2864
2865 if (!ignore_file(de->d_name)) {
2866 r = 0;
2867 break;
2868 }
2869 }
2870
2871 closedir(d);
2872 return r;
2873}
2874
d3782d60
LP		 2875unsigned long long random_ull(void) {
2876 int fd;
2877 uint64_t ull;
2878 ssize_t r;
2879
2880 if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0)
2881 goto fallback;
2882
eb22ac37 2883 r = loop_read(fd, &ull, sizeof(ull), true);
d3782d60
LP		 2884 close_nointr_nofail(fd);
2885
2886 if (r != sizeof(ull))
2887 goto fallback;
2888
2889 return ull;
2890
2891fallback:
2892 return random() * RAND_MAX + random();
2893}
2894
5b6319dc
LP		 2895void rename_process(const char name[8]) {
2896 assert(name);
2897
2898 prctl(PR_SET_NAME, name);
2899
2900 /* This is a like a poor man's setproctitle(). The string
2901 * passed should fit in 7 chars (i.e. the length of
2902 * "systemd") */
2903
2904 if (program_invocation_name)
2905 strncpy(program_invocation_name, name, strlen(program_invocation_name));
2906}
2907
7d793605
LP		 2908void sigset_add_many(sigset_t *ss, ...) {
2909 va_list ap;
2910 int sig;
2911
2912 assert(ss);
2913
2914 va_start(ap, ss);
2915 while ((sig = va_arg(ap, int)) > 0)
2916 assert_se(sigaddset(ss, sig) == 0);
2917 va_end(ap);
2918}
2919
ef2f1067
LP		 2920char* gethostname_malloc(void) {
2921 struct utsname u;
2922
2923 assert_se(uname(&u) >= 0);
2924
2925 if (u.nodename[0])
2926 return strdup(u.nodename);
2927
2928 return strdup(u.sysname);
2929}
2930
2931char* getlogname_malloc(void) {
2932 uid_t uid;
2933 long bufsize;
2934 char *buf, *name;
2935 struct passwd pwbuf, *pw = NULL;
2936 struct stat st;
2937
2938 if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
2939 uid = st.st_uid;
2940 else
2941 uid = getuid();
2942
2943 /* Shortcut things to avoid NSS lookups */
2944 if (uid == 0)
2945 return strdup("root");
2946
2947 if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0)
2948 bufsize = 4096;
2949
2950 if (!(buf = malloc(bufsize)))
2951 return NULL;
2952
2953 if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) {
2954 name = strdup(pw->pw_name);
2955 free(buf);
2956 return name;
2957 }
2958
2959 free(buf);
2960
2961 if (asprintf(&name, "%lu", (unsigned long) uid) < 0)
2962 return NULL;
2963
2964 return name;
2965}
2966
fc116c6a
LP		 2967int getttyname_malloc(int fd, char **r) {
2968 char path[PATH_MAX], *c;
618e02c7 2969 int k;
8c6db833
LP		 2970
2971 assert(r);
ef2f1067 2972
fc116c6a 2973 if ((k = ttyname_r(fd, path, sizeof(path))) != 0)
618e02c7 2974 return -k;
ef2f1067
LP		 2975
2976 char_array_0(path);
2977
fc116c6a 2978 if (!(c = strdup(startswith(path, "/dev/") ? path + 5 : path)))
8c6db833
LP		 2979 return -ENOMEM;
2980
2981 *r = c;
2982 return 0;
2983}
2984
fc116c6a
LP		 2985int getttyname_harder(int fd, char **r) {
2986 int k;
2987 char *s;
2988
2989 if ((k = getttyname_malloc(fd, &s)) < 0)
2990 return k;
2991
2992 if (streq(s, "tty")) {
2993 free(s);
46824d0e 2994 return get_ctty(r, NULL);
fc116c6a
LP		 2995 }
2996
2997 *r = s;
2998 return 0;
2999}
3000
3001int get_ctty_devnr(dev_t *d) {
3002 int k;
20c03b7b 3003 char line[LINE_MAX], *p;
fc116c6a
LP		 3004 unsigned long ttynr;
3005 FILE *f;
3006
3007 if (!(f = fopen("/proc/self/stat", "r")))
3008 return -errno;
3009
3010 if (!(fgets(line, sizeof(line), f))) {
3011 k = -errno;
3012 fclose(f);
3013 return k;
3014 }
3015
3016 fclose(f);
3017
3018 if (!(p = strrchr(line, ')')))
3019 return -EIO;
3020
3021 p++;
3022
3023 if (sscanf(p, " "
3024 "%*c " /* state */
3025 "%*d " /* ppid */
3026 "%*d " /* pgrp */
3027 "%*d " /* session */
3028 "%lu ", /* ttynr */
3029 &ttynr) != 1)
3030 return -EIO;
3031
3032 *d = (dev_t) ttynr;
3033 return 0;
3034}
3035
46824d0e 3036int get_ctty(char **r, dev_t *_devnr) {
fc116c6a 3037 int k;
20c03b7b 3038 char fn[PATH_MAX], *s, *b, *p;
fc116c6a
LP		 3039 dev_t devnr;
3040
3041 assert(r);
3042
3043 if ((k = get_ctty_devnr(&devnr)) < 0)
3044 return k;
3045
3046 snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr));
3047 char_array_0(fn);
3048
3049 if ((k = readlink_malloc(fn, &s)) < 0) {
3050
3051 if (k != -ENOENT)
3052 return k;
3053
46824d0e
LP		 3054 /* This is an ugly hack */
3055 if (major(devnr) == 136) {
3056 if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0)
3057 return -ENOMEM;
3058
3059 *r = b;
3060 if (_devnr)
3061 *_devnr = devnr;
3062
3063 return 0;
3064 }
3065
fc116c6a
LP		 3066 /* Probably something like the ptys which have no
3067 * symlink in /dev/char. Let's return something
3068 * vaguely useful. */
3069
3070 if (!(b = strdup(fn + 5)))
3071 return -ENOMEM;
3072
3073 *r = b;
46824d0e
LP		 3074 if (_devnr)
3075 *_devnr = devnr;
3076
fc116c6a
LP		 3077 return 0;
3078 }
3079
3080 if (startswith(s, "/dev/"))
3081 p = s + 5;
3082 else if (startswith(s, "../"))
3083 p = s + 3;
3084 else
3085 p = s;
3086
3087 b = strdup(p);
3088 free(s);
3089
3090 if (!b)
3091 return -ENOMEM;
3092
3093 *r = b;
46824d0e
LP		 3094 if (_devnr)
3095 *_devnr = devnr;
3096
fc116c6a
LP		 3097 return 0;
3098}
3099
8c6db833
LP		 3100static int rm_rf_children(int fd, bool only_dirs) {
3101 DIR *d;
3102 int ret = 0;
3103
3104 assert(fd >= 0);
3105
3106 /* This returns the first error we run into, but nevertheless
3107 * tries to go on */
3108
3109 if (!(d = fdopendir(fd))) {
3110 close_nointr_nofail(fd);
4c633005
LP		 3111
3112 return errno == ENOENT ? 0 : -errno;
8c6db833
LP		 3113 }
3114
3115 for (;;) {
3116 struct dirent buf, *de;
3117 bool is_dir;
3118 int r;
3119
3120 if ((r = readdir_r(d, &buf, &de)) != 0) {
3121 if (ret == 0)
3122 ret = -r;
3123 break;
3124 }
3125
3126 if (!de)
3127 break;
3128
3129 if (streq(de->d_name, ".") || streq(de->d_name, ".."))
3130 continue;
3131
3132 if (de->d_type == DT_UNKNOWN) {
3133 struct stat st;
3134
3135 if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
4c633005 3136 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3137 ret = -errno;
3138 continue;
3139 }
3140
3141 is_dir = S_ISDIR(st.st_mode);
3142 } else
3143 is_dir = de->d_type == DT_DIR;
3144
3145 if (is_dir) {
3146 int subdir_fd;
3147
3148 if ((subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
4c633005 3149 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3150 ret = -errno;
3151 continue;
3152 }
3153
3154 if ((r = rm_rf_children(subdir_fd, only_dirs)) < 0) {
3155 if (ret == 0)
3156 ret = r;
3157 }
3158
3159 if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
4c633005 3160 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3161 ret = -errno;
3162 }
3163 } else if (!only_dirs) {
3164
3165 if (unlinkat(fd, de->d_name, 0) < 0) {
4c633005 3166 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3167 ret = -errno;
3168 }
3169 }
3170 }
3171
3172 closedir(d);
3173
3174 return ret;
3175}
3176
3177int rm_rf(const char *path, bool only_dirs, bool delete_root) {
3178 int fd;
3179 int r;
3180
3181 assert(path);
3182
3183 if ((fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
3184
3185 if (errno != ENOTDIR)
3186 return -errno;
3187
3188 if (delete_root && !only_dirs)
3189 if (unlink(path) < 0)
3190 return -errno;
3191
3192 return 0;
3193 }
3194
3195 r = rm_rf_children(fd, only_dirs);
3196
3197 if (delete_root)
3198 if (rmdir(path) < 0) {
3199 if (r == 0)
3200 r = -errno;
3201 }
3202
3203 return r;
3204}
3205
3206int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
3207 assert(path);
3208
3209 /* Under the assumption that we are running privileged we
3210 * first change the access mode and only then hand out
3211 * ownership to avoid a window where access is too open. */
3212
3213 if (chmod(path, mode) < 0)
3214 return -errno;
3215
3216 if (chown(path, uid, gid) < 0)
3217 return -errno;
3218
3219 return 0;
ef2f1067
LP		 3220}
3221
82c121a4
LP		 3222cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
3223 cpu_set_t *r;
3224 unsigned n = 1024;
3225
3226 /* Allocates the cpuset in the right size */
3227
3228 for (;;) {
3229 if (!(r = CPU_ALLOC(n)))
3230 return NULL;
3231
3232 if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) {
3233 CPU_ZERO_S(CPU_ALLOC_SIZE(n), r);
3234
3235 if (ncpus)
3236 *ncpus = n;
3237
3238 return r;
3239 }
3240
3241 CPU_FREE(r);
3242
3243 if (errno != EINVAL)
3244 return NULL;
3245
3246 n *= 2;
3247 }
3248}
3249
9e58ff9c
LP		 3250void status_vprintf(const char *format, va_list ap) {
3251 char *s = NULL;
3252 int fd = -1;
3253
3254 assert(format);
3255
3256 /* This independent of logging, as status messages are
3257 * optional and go exclusively to the console. */
3258
3259 if (vasprintf(&s, format, ap) < 0)
3260 goto finish;
3261
3262 if ((fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0)
3263 goto finish;
3264
3265 write(fd, s, strlen(s));
3266
3267finish:
3268 free(s);
3269
3270 if (fd >= 0)
3271 close_nointr_nofail(fd);
3272}
3273
c846ff47
LP		 3274void status_printf(const char *format, ...) {
3275 va_list ap;
3276
3277 assert(format);
3278
3279 va_start(ap, format);
3280 status_vprintf(format, ap);
3281 va_end(ap);
3282}
3283
3284void status_welcome(void) {
10aa7034
LP		 3285 char *pretty_name = NULL, *ansi_color = NULL;
3286 const char *const_pretty = NULL, *const_color = NULL;
3287 int r;
c846ff47 3288
10aa7034
LP		 3289 if ((r = parse_env_file("/etc/os-release", NEWLINE,
3290 "PRETTY_NAME", &pretty_name,
3291 "ANSI_COLOR", &ansi_color,
3292 NULL)) < 0) {
c846ff47 3293
10aa7034
LP		 3294 if (r != -ENOENT)
3295 log_warning("Failed to read /etc/os-release: %s", strerror(-r));
3296 }
c846ff47 3297
10aa7034
LP		 3298#if defined(TARGET_FEDORA)
3299 if (!pretty_name) {
3300 if ((r = read_one_line_file("/etc/system-release", &pretty_name)) < 0) {
c846ff47 3301
10aa7034
LP		 3302 if (r != -ENOENT)
3303 log_warning("Failed to read /etc/system-release: %s", strerror(-r));
6f9a471a 3304 }
10aa7034 3305 }
c846ff47 3306
10aa7034 3307 if (!ansi_color && pretty_name) {
c846ff47 3308
10aa7034
LP		 3309 /* This tries to mimic the color magic the old Red Hat sysinit
3310 * script did. */
3311
3312 if (startswith(pretty_name, "Red Hat"))
3313 const_color = "0;31"; /* Red for RHEL */
3314 else if (startswith(pretty_name, "Fedora"))
3315 const_color = "0;34"; /* Blue for Fedora */
3316 }
c846ff47
LP		 3317
3318#elif defined(TARGET_SUSE)
c846ff47 3319
10aa7034
LP		 3320 if (!pretty_name) {
3321 if ((r = read_one_line_file("/etc/SuSE-release", &pretty_name)) < 0) {
c846ff47 3322
10aa7034
LP		 3323 if (r != -ENOENT)
3324 log_warning("Failed to read /etc/SuSE-release: %s", strerror(-r));
6f9a471a 3325 }
10aa7034 3326 }
c846ff47 3327
10aa7034
LP		 3328 if (!ansi_color)
3329 const_color = "0;32"; /* Green for openSUSE */
5a6225fd 3330
0d37b36b 3331#elif defined(TARGET_GENTOO)
0d37b36b 3332
10aa7034
LP		 3333 if (!pretty_name) {
3334 if ((r = read_one_line_file("/etc/gentoo-release", &pretty_name)) < 0) {
0d37b36b 3335
10aa7034
LP		 3336 if (r != -ENOENT)
3337 log_warning("Failed to read /etc/gentoo-release: %s", strerror(-r));
6f9a471a 3338 }
10aa7034 3339 }
0d37b36b 3340
10aa7034
LP		 3341 if (!ansi_color)
3342 const_color = "1;34"; /* Light Blue for Gentoo */
5a6225fd 3343
a338bab5
AS		 3344#elif defined(TARGET_ALTLINUX)
3345
3346 if (!pretty_name) {
3347 if ((r = read_one_line_file("/etc/altlinux-release", &pretty_name)) < 0) {
3348
3349 if (r != -ENOENT)
3350 log_warning("Failed to read /etc/altlinux-release: %s", strerror(-r));
6f9a471a 3351 }
a338bab5
AS		 3352 }
3353
3354 if (!ansi_color)
3355 const_color = "0;36"; /* Cyan for ALTLinux */
3356
3357
5a6225fd 3358#elif defined(TARGET_DEBIAN)
5a6225fd 3359
10aa7034 3360 if (!pretty_name) {
22927a36 3361 char *version;
c8bffa43 3362
22927a36 3363 if ((r = read_one_line_file("/etc/debian_version", &version)) < 0) {
5a6225fd 3364
10aa7034
LP		 3365 if (r != -ENOENT)
3366 log_warning("Failed to read /etc/debian_version: %s", strerror(-r));
22927a36 3367 } else {
22927a36
MB		 3368 pretty_name = strappend("Debian ", version);
3369 free(version);
c8bffa43
LP		 3370
3371 if (!pretty_name)
3372 log_warning("Failed to allocate Debian version string.");
22927a36 3373 }
10aa7034 3374 }
5a6225fd 3375
10aa7034
LP		 3376 if (!ansi_color)
3377 const_color = "1;31"; /* Light Red for Debian */
5a6225fd 3378
274914f9 3379#elif defined(TARGET_UBUNTU)
10aa7034
LP		 3380
3381 if ((r = parse_env_file("/etc/lsb-release", NEWLINE,
3382 "DISTRIB_DESCRIPTION", &pretty_name,
3383 NULL)) < 0) {
3384
3385 if (r != -ENOENT)
3386 log_warning("Failed to read /etc/lsb-release: %s", strerror(-r));
3387 }
3388
3389 if (!ansi_color)
3390 const_color = "0;33"; /* Orange/Brown for Ubuntu */
3391
1de4d79b
AB		 3392#elif defined(TARGET_MANDRIVA)
3393
3394 if (!pretty_name) {
3395 char *s, *p;
3396
3397 if ((r = read_one_line_file("/etc/mandriva-release", &s) < 0)) {
3398 if (r != -ENOENT)
3399 log_warning("Failed to read /etc/mandriva-release: %s", strerror(-r));
3400 } else {
3401 p = strstr(s, " release ");
3402 if (p) {
3403 *p = '\0';
3404 p += 9;
3405 p[strcspn(p, " ")] = '\0';
3406
3407 /* This corresponds to standard rc.sysinit */
3408 if (asprintf(&pretty_name, "%s\x1B[0;39m %s", s, p) > 0)
3409 const_color = "1;36";
3410 else
3411 log_warning("Failed to allocate Mandriva version string.");
3412 } else
3413 log_warning("Failed to parse /etc/mandriva-release");
3414 free(s);
3415 }
3416 }
54e4fdef 3417#elif defined(TARGET_MEEGO)
1de4d79b 3418
54e4fdef
CF		 3419 if (!pretty_name) {
3420 if ((r = read_one_line_file("/etc/meego-release", &pretty_name)) < 0) {
3421
3422 if (r != -ENOENT)
3423 log_warning("Failed to read /etc/meego-release: %s", strerror(-r));
3424 }
3425 }
3426
3427 if (!ansi_color)
3428 const_color = "1;35"; /* Bright Magenta for MeeGo */
c846ff47 3429#endif
10aa7034
LP		 3430
3431 if (!pretty_name && !const_pretty)
3432 const_pretty = "Linux";
3433
3434 if (!ansi_color && !const_color)
3435 const_color = "1";
3436
da71f23c 3437 status_printf("\nWelcome to \x1B[%sm%s\x1B[0m!\n\n",
10aa7034
LP		 3438 const_color ? const_color : ansi_color,
3439 const_pretty ? const_pretty : pretty_name);
86a3475b
LP		 3440
3441 free(ansi_color);
3442 free(pretty_name);
c846ff47
LP		 3443}
3444
fab56fc5
LP		 3445char *replace_env(const char *format, char **env) {
3446 enum {
3447 WORD,
c24eb49e 3448 CURLY,
fab56fc5
LP		 3449 VARIABLE
3450 } state = WORD;
3451
3452 const char *e, *word = format;
3453 char *r = NULL, *k;
3454
3455 assert(format);
3456
3457 for (e = format; *e; e ++) {
3458
3459 switch (state) {
3460
3461 case WORD:
3462 if (*e == '$')
c24eb49e 3463 state = CURLY;
fab56fc5
LP		 3464 break;
3465
c24eb49e
LP		 3466 case CURLY:
3467 if (*e == '{') {
fab56fc5
LP		 3468 if (!(k = strnappend(r, word, e-word-1)))
3469 goto fail;
3470
3471 free(r);
3472 r = k;
3473
3474 word = e-1;
3475 state = VARIABLE;
3476
3477 } else if (*e == '$') {
3478 if (!(k = strnappend(r, word, e-word)))
3479 goto fail;
3480
3481 free(r);
3482 r = k;
3483
3484 word = e+1;
3485 state = WORD;
3486 } else
3487 state = WORD;
3488 break;
3489
3490 case VARIABLE:
c24eb49e 3491 if (*e == '}') {
b95cf362 3492 const char *t;
fab56fc5 3493
b95cf362
LP		 3494 if (!(t = strv_env_get_with_length(env, word+2, e-word-2)))
3495 t = "";
fab56fc5 3496
b95cf362
LP		 3497 if (!(k = strappend(r, t)))
3498 goto fail;
fab56fc5 3499
b95cf362
LP		 3500 free(r);
3501 r = k;
fab56fc5 3502
b95cf362 3503 word = e+1;
fab56fc5
LP		 3504 state = WORD;
3505 }
3506 break;
3507 }
3508 }
3509
3510 if (!(k = strnappend(r, word, e-word)))
3511 goto fail;
3512
3513 free(r);
3514 return k;
3515
3516fail:
3517 free(r);
3518 return NULL;
3519}
3520
3521char **replace_env_argv(char **argv, char **env) {
3522 char **r, **i;
c24eb49e
LP		 3523 unsigned k = 0, l = 0;
3524
3525 l = strv_length(argv);
fab56fc5 3526
c24eb49e 3527 if (!(r = new(char*, l+1)))
fab56fc5
LP		 3528 return NULL;
3529
3530 STRV_FOREACH(i, argv) {
c24eb49e
LP		 3531
3532 /* If $FOO appears as single word, replace it by the split up variable */
b95cf362
LP		 3533 if ((*i)[0] == '$' && (*i)[1] != '{') {
3534 char *e;
3535 char **w, **m;
3536 unsigned q;
c24eb49e 3537
b95cf362 3538 if ((e = strv_env_get(env, *i+1))) {
c24eb49e
LP		 3539
3540 if (!(m = strv_split_quoted(e))) {
3541 r[k] = NULL;
3542 strv_free(r);
3543 return NULL;
3544 }
b95cf362
LP		 3545 } else
3546 m = NULL;
c24eb49e 3547
b95cf362
LP		 3548 q = strv_length(m);
3549 l = l + q - 1;
c24eb49e 3550
b95cf362
LP		 3551 if (!(w = realloc(r, sizeof(char*) * (l+1)))) {
3552 r[k] = NULL;
3553 strv_free(r);
3554 strv_free(m);
3555 return NULL;
3556 }
c24eb49e 3557
b95cf362
LP		 3558 r = w;
3559 if (m) {
c24eb49e
LP		 3560 memcpy(r + k, m, q * sizeof(char*));
3561 free(m);
c24eb49e 3562 }
b95cf362
LP		 3563
3564 k += q;
3565 continue;
c24eb49e
LP		 3566 }
3567
3568 /* If ${FOO} appears as part of a word, replace it by the variable as-is */
fab56fc5
LP		 3569 if (!(r[k++] = replace_env(*i, env))) {
3570 strv_free(r);
3571 return NULL;
3572 }
3573 }
3574
3575 r[k] = NULL;
3576 return r;
3577}
3578
fa776d8e
LP		 3579int columns(void) {
3580 static __thread int parsed_columns = 0;
3581 const char *e;
3582
3583 if (parsed_columns > 0)
3584 return parsed_columns;
3585
3586 if ((e = getenv("COLUMNS")))
3587 parsed_columns = atoi(e);
3588
3589 if (parsed_columns <= 0) {
3590 struct winsize ws;
3591 zero(ws);
3592
9ed95f43 3593 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) >= 0)
fa776d8e
LP		 3594 parsed_columns = ws.ws_col;
3595 }
3596
3597 if (parsed_columns <= 0)
3598 parsed_columns = 80;
3599
3600 return parsed_columns;
3601}
3602
b4f10a5e
LP		 3603int running_in_chroot(void) {
3604 struct stat a, b;
3605
3606 zero(a);
3607 zero(b);
3608
3609 /* Only works as root */
3610
3611 if (stat("/proc/1/root", &a) < 0)
3612 return -errno;
3613
3614 if (stat("/", &b) < 0)
3615 return -errno;
3616
3617 return
3618 a.st_dev != b.st_dev ||
3619 a.st_ino != b.st_ino;
3620}
3621
8fe914ec
LP		 3622char *ellipsize(const char *s, unsigned length, unsigned percent) {
3623 size_t l, x;
3624 char *r;
3625
3626 assert(s);
3627 assert(percent <= 100);
3628 assert(length >= 3);
3629
3630 l = strlen(s);
3631
3632 if (l <= 3 || l <= length)
3633 return strdup(s);
3634
3635 if (!(r = new0(char, length+1)))
3636 return r;
3637
3638 x = (length * percent) / 100;
3639
3640 if (x > length - 3)
3641 x = length - 3;
3642
3643 memcpy(r, s, x);
3644 r[x] = '.';
3645 r[x+1] = '.';
3646 r[x+2] = '.';
3647 memcpy(r + x + 3,
3648 s + l - (length - x - 3),
3649 length - x - 3);
3650
3651 return r;
3652}
3653
f6144808
LP		 3654int touch(const char *path) {
3655 int fd;
3656
3657 assert(path);
3658
14f3c825 3659 if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0)
f6144808
LP		 3660 return -errno;
3661
3662 close_nointr_nofail(fd);
3663 return 0;
3664}
afea26ad 3665
97c4a07d 3666char *unquote(const char *s, const char* quotes) {
11ce3427
LP		 3667 size_t l;
3668 assert(s);
3669
3670 if ((l = strlen(s)) < 2)
3671 return strdup(s);
3672
97c4a07d 3673 if (strchr(quotes, s[0]) && s[l-1] == s[0])
11ce3427
LP		 3674 return strndup(s+1, l-2);
3675
3676 return strdup(s);
3677}
3678
5f7c426e
LP		 3679char *normalize_env_assignment(const char *s) {
3680 char *name, *value, *p, *r;
3681
3682 p = strchr(s, '=');
3683
3684 if (!p) {
3685 if (!(r = strdup(s)))
3686 return NULL;
3687
3688 return strstrip(r);
3689 }
3690
3691 if (!(name = strndup(s, p - s)))
3692 return NULL;
3693
3694 if (!(p = strdup(p+1))) {
3695 free(name);
3696 return NULL;
3697 }
3698
3699 value = unquote(strstrip(p), QUOTES);
3700 free(p);
3701
3702 if (!value) {
5f7c426e
LP		 3703 free(name);
3704 return NULL;
3705 }
3706
3707 if (asprintf(&r, "%s=%s", name, value) < 0)
3708 r = NULL;
3709
3710 free(value);
3711 free(name);
3712
3713 return r;
3714}
3715
8e12a6ae 3716int wait_for_terminate(pid_t pid, siginfo_t *status) {
2e78aa99
LP		 3717 assert(pid >= 1);
3718 assert(status);
3719
3720 for (;;) {
8e12a6ae
LP		 3721 zero(*status);
3722
3723 if (waitid(P_PID, pid, status, WEXITED) < 0) {
2e78aa99
LP		 3724
3725 if (errno == EINTR)
3726 continue;
3727
3728 return -errno;
3729 }
3730
3731 return 0;
3732 }
3733}
3734
97c4a07d
LP		 3735int wait_for_terminate_and_warn(const char *name, pid_t pid) {
3736 int r;
3737 siginfo_t status;
3738
3739 assert(name);
3740 assert(pid > 1);
3741
3742 if ((r = wait_for_terminate(pid, &status)) < 0) {
3743 log_warning("Failed to wait for %s: %s", name, strerror(-r));
3744 return r;
3745 }
3746
3747 if (status.si_code == CLD_EXITED) {
3748 if (status.si_status != 0) {
3749 log_warning("%s failed with error code %i.", name, status.si_status);
0a27cf3f 3750 return status.si_status;
97c4a07d
LP		 3751 }
3752
3753 log_debug("%s succeeded.", name);
3754 return 0;
3755
3756 } else if (status.si_code == CLD_KILLED ||
3757 status.si_code == CLD_DUMPED) {
3758
3759 log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status));
3760 return -EPROTO;
3761 }
3762
3763 log_warning("%s failed due to unknown reason.", name);
3764 return -EPROTO;
3765
3766}
3767
3c14d26c 3768void freeze(void) {
720ce21d
LP		 3769
3770 /* Make sure nobody waits for us on a socket anymore */
3771 close_all_fds(NULL, 0);
3772
c29597a1
LP		 3773 sync();
3774
3c14d26c
LP		 3775 for (;;)
3776 pause();
3777}
3778
00dc5d76
LP		 3779bool null_or_empty(struct stat *st) {
3780 assert(st);
3781
3782 if (S_ISREG(st->st_mode) && st->st_size <= 0)
3783 return true;
3784
c8f26f42 3785 if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode))
00dc5d76
LP		 3786 return true;
3787
3788 return false;
3789}
3790
a247755d 3791DIR *xopendirat(int fd, const char *name, int flags) {
c4731d11
LP		 3792 int nfd;
3793 DIR *d;
3794
3795 if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0)
3796 return NULL;
3797
3798 if (!(d = fdopendir(nfd))) {
3799 close_nointr_nofail(nfd);
3800 return NULL;
3801 }
3802
3803 return d;
3b63d2d3
LP		 3804}
3805
8a0867d6
LP		 3806int signal_from_string_try_harder(const char *s) {
3807 int signo;
3808 assert(s);
3809
3810 if ((signo = signal_from_string(s)) <= 0)
3811 if (startswith(s, "SIG"))
3812 return signal_from_string(s+3);
3813
3814 return signo;
3815}
3816
10717a1a
LP		 3817void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) {
3818
3819 assert(f);
3820 assert(name);
3821 assert(t);
3822
3823 if (!dual_timestamp_is_set(t))
3824 return;
3825
3826 fprintf(f, "%s=%llu %llu\n",
3827 name,
3828 (unsigned long long) t->realtime,
3829 (unsigned long long) t->monotonic);
3830}
3831
799fd0fd 3832void dual_timestamp_deserialize(const char *value, dual_timestamp *t) {
10717a1a
LP		 3833 unsigned long long a, b;
3834
10717a1a
LP		 3835 assert(value);
3836 assert(t);
3837
3838 if (sscanf(value, "%lli %llu", &a, &b) != 2)
3839 log_debug("Failed to parse finish timestamp value %s", value);
3840 else {
3841 t->realtime = a;
3842 t->monotonic = b;
3843 }
3844}
3845
e23a0ce8
LP		 3846char *fstab_node_to_udev_node(const char *p) {
3847 char *dn, *t, *u;
3848 int r;
3849
3850 /* FIXME: to follow udev's logic 100% we need to leave valid
3851 * UTF8 chars unescaped */
3852
3853 if (startswith(p, "LABEL=")) {
3854
3855 if (!(u = unquote(p+6, "\"\'")))
3856 return NULL;
3857
3858 t = xescape(u, "/ ");
3859 free(u);
3860
3861 if (!t)
3862 return NULL;
3863
3864 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
3865 free(t);
3866
3867 if (r < 0)
3868 return NULL;
3869
3870 return dn;
3871 }
3872
3873 if (startswith(p, "UUID=")) {
3874
3875 if (!(u = unquote(p+5, "\"\'")))
3876 return NULL;
3877
3878 t = xescape(u, "/ ");
3879 free(u);
3880
3881 if (!t)
3882 return NULL;
3883
0058d7b9 3884 r = asprintf(&dn, "/dev/disk/by-uuid/%s", t);
e23a0ce8
LP		 3885 free(t);
3886
3887 if (r < 0)
3888 return NULL;
3889
3890 return dn;
3891 }
3892
3893 return strdup(p);
3894}
3895
e9ddabc2
LP		 3896void filter_environ(const char *prefix) {
3897 int i, j;
3898 assert(prefix);
3899
3900 if (!environ)
3901 return;
3902
3903 for (i = 0, j = 0; environ[i]; i++) {
3904
3905 if (startswith(environ[i], prefix))
3906 continue;
3907
3908 environ[j++] = environ[i];
3909 }
3910
3911 environ[j] = NULL;
3912}
3913
f212ac12
LP		 3914bool tty_is_vc(const char *tty) {
3915 assert(tty);
3916
3917 if (startswith(tty, "/dev/"))
3918 tty += 5;
3919
3920 return startswith(tty, "tty") &&
3921 tty[3] >= '0' && tty[3] <= '9';
3922}
3923
e3aa71c3 3924const char *default_term_for_tty(const char *tty) {
3030ccd7
LP		 3925 char *active = NULL;
3926 const char *term;
3927
e3aa71c3
LP		 3928 assert(tty);
3929
3930 if (startswith(tty, "/dev/"))
3931 tty += 5;
3932
3030ccd7
LP		 3933 /* Resolve where /dev/console is pointing when determining
3934 * TERM */
3935 if (streq(tty, "console"))
3936 if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) {
079a09fb
LP		 3937 /* If multiple log outputs are configured the
3938 * last one is what /dev/console points to */
3939 if ((tty = strrchr(active, ' ')))
3940 tty++;
3941 else
3942 tty = active;
3030ccd7
LP		 3943 }
3944
f212ac12 3945 term = tty_is_vc(tty) ? "TERM=linux" : "TERM=vt100";
3030ccd7 3946 free(active);
e3aa71c3 3947
3030ccd7 3948 return term;
e3aa71c3
LP		 3949}
3950
07faed4f
LP		 3951/* Returns a short identifier for the various VM implementations */
3952int detect_vm(const char **id) {
46a08e38
LP		 3953
3954#if defined(__i386__) || defined(__x86_64__)
3955
3956 /* Both CPUID and DMI are x86 specific interfaces... */
3957
721bca57 3958 static const char *const dmi_vendors[] = {
46a08e38
LP		 3959 "/sys/class/dmi/id/sys_vendor",
3960 "/sys/class/dmi/id/board_vendor",
3961 "/sys/class/dmi/id/bios_vendor"
3962 };
3963
4e08da90 3964 static const char dmi_vendor_table[] =
07faed4f
LP		 3965 "QEMU\0" "qemu\0"
3966 /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
3967 "VMware\0" "vmware\0"
3968 "VMW\0" "vmware\0"
3969 "Microsoft Corporation\0" "microsoft\0"
3970 "innotek GmbH\0" "oracle\0"
3971 "Xen\0" "xen\0"
34df5a34 3972 "Bochs\0" "bochs\0";
07faed4f 3973
4e08da90 3974 static const char cpuid_vendor_table[] =
07faed4f
LP		 3975 "XenVMMXenVMM\0" "xen\0"
3976 "KVMKVMKVM\0" "kvm\0"
3977 /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
3978 "VMwareVMware\0" "vmware\0"
3979 /* http://msdn.microsoft.com/en-us/library/ff542428.aspx */
34df5a34 3980 "Microsoft Hv\0" "microsoft\0";
07faed4f
LP		 3981
3982 uint32_t eax, ecx;
46a08e38
LP		 3983 union {
3984 uint32_t sig32[3];
3985 char text[13];
3986 } sig;
46a08e38 3987 unsigned i;
07faed4f 3988 const char *j, *k;
721bca57 3989 bool hypervisor;
46a08e38
LP		 3990
3991 /* http://lwn.net/Articles/301888/ */
3992 zero(sig);
3993
46a08e38
LP		 3994#if defined (__i386__)
3995#define REG_a "eax"
3996#define REG_b "ebx"
3997#elif defined (__amd64__)
3998#define REG_a "rax"
3999#define REG_b "rbx"
4000#endif
4001
07faed4f
LP		 4002 /* First detect whether there is a hypervisor */
4003 eax = 1;
46a08e38
LP		 4004 __asm__ __volatile__ (
4005 /* ebx/rbx is being used for PIC! */
4006 " push %%"REG_b" \n\t"
4007 " cpuid \n\t"
46a08e38
LP		 4008 " pop %%"REG_b" \n\t"
4009
07faed4f 4010 : "=a" (eax), "=c" (ecx)
46a08e38
LP		 4011 : "0" (eax)
4012 );
4013
ec195f55 4014 hypervisor = !!(ecx & 0x80000000U);
721bca57
LP		 4015
4016 if (hypervisor) {
07faed4f
LP		 4017
4018 /* There is a hypervisor, see what it is */
4019 eax = 0x40000000U;
4020 __asm__ __volatile__ (
4021 /* ebx/rbx is being used for PIC! */
4022 " push %%"REG_b" \n\t"
4023 " cpuid \n\t"
4024 " mov %%ebx, %1 \n\t"
4025 " pop %%"REG_b" \n\t"
4026
4027 : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2])
4028 : "0" (eax)
4029 );
4030
4031 NULSTR_FOREACH_PAIR(j, k, cpuid_vendor_table)
4032 if (streq(sig.text, j)) {
4033
4034 if (id)
4035 *id = k;
4036
4037 return 1;
4038 }
721bca57 4039 }
07faed4f 4040
721bca57
LP		 4041 for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) {
4042 char *s;
4043 int r;
4044 const char *found = NULL;
4045
4046 if ((r = read_one_line_file(dmi_vendors[i], &s)) < 0) {
4047 if (r != -ENOENT)
4048 return r;
4049
4050 continue;
4051 }
4052
4053 NULSTR_FOREACH_PAIR(j, k, dmi_vendor_table)
4054 if (startswith(s, j))
4055 found = k;
4056 free(s);
4057
4058 if (found) {
4059 if (id)
4060 *id = found;
4061
4062 return 1;
4063 }
4064 }
4065
4066 if (hypervisor) {
07faed4f
LP		 4067 if (id)
4068 *id = "other";
4069
4070 return 1;
4071 }
46a08e38 4072
721bca57 4073#endif
07faed4f
LP		 4074 return 0;
4075}
4076
ef2df9f4 4077int detect_container(const char **id) {
f9b9232b
LP		 4078 FILE *f;
4079
ef2df9f4
LP		 4080 /* Unfortunately many of these operations require root access
4081 * in one way or another */
f9b9232b 4082
ef2df9f4
LP		 4083 if (geteuid() != 0)
4084 return -EPERM;
4085
4086 if (running_in_chroot() > 0) {
f9b9232b
LP		 4087
4088 if (id)
ef2df9f4 4089 *id = "chroot";
f9b9232b
LP		 4090
4091 return 1;
4092 }
07faed4f 4093
ef2df9f4
LP		 4094 /* /proc/vz exists in container and outside of the container,
4095 * /proc/bc only outside of the container. */
4096 if (access("/proc/vz", F_OK) >= 0 &&
4097 access("/proc/bc", F_OK) < 0) {
07faed4f 4098
ef2df9f4
LP		 4099 if (id)
4100 *id = "openvz";
4101
4102 return 1;
f9b9232b 4103 }
07faed4f 4104
f9b9232b
LP		 4105 if ((f = fopen("/proc/self/cgroup", "r"))) {
4106
4107 for (;;) {
4108 char line[LINE_MAX], *p;
4109
4110 if (!fgets(line, sizeof(line), f))
4111 break;
4112
4113 if (!(p = strchr(strstrip(line), ':')))
4114 continue;
4115
4116 if (strncmp(p, ":ns:", 4))
4117 continue;
4118
4119 if (!streq(p, ":ns:/")) {
4120 fclose(f);
4121
ef2df9f4 4122 if (id)
28cf382a 4123 *id = "pidns";
ef2df9f4
LP		 4124
4125 return 1;
f9b9232b
LP		 4126 }
4127 }
4128
4129 fclose(f);
07faed4f
LP		 4130 }
4131
ef2df9f4
LP		 4132 return 0;
4133}
4134
4135/* Returns a short identifier for the various VM/container implementations */
4136int detect_virtualization(const char **id) {
4137 static __thread const char *cached_id = NULL;
4138 const char *_id;
4139 int r;
4140
4141 if (cached_id) {
4142
4143 if (cached_id == (const char*) -1)
4144 return 0;
4145
4146 if (id)
4147 *id = cached_id;
4148
4149 return 1;
f9b9232b 4150 }
07faed4f 4151
ef2df9f4
LP		 4152 if ((r = detect_container(&_id)) != 0)
4153 goto finish;
4154
f9b9232b 4155 r = detect_vm(&_id);
07faed4f 4156
f9b9232b 4157finish:
ef2df9f4 4158 if (r > 0) {
f9b9232b 4159 cached_id = _id;
07faed4f 4160
ef2df9f4
LP		 4161 if (id)
4162 *id = _id;
4163 } else if (r == 0)
4164 cached_id = (const char*) -1;
f9b9232b
LP		 4165
4166 return r;
46a08e38
LP		 4167}
4168
83cc030f
LP		 4169void execute_directory(const char *directory, DIR *d, char *argv[]) {
4170 DIR *_d = NULL;
4171 struct dirent *de;
4172 Hashmap *pids = NULL;
4173
4174 assert(directory);
4175
4176 /* Executes all binaries in a directory in parallel and waits
4177 * until all they all finished. */
4178
4179 if (!d) {
4180 if (!(_d = opendir(directory))) {
4181
4182 if (errno == ENOENT)
4183 return;
4184
4185 log_error("Failed to enumerate directory %s: %m", directory);
4186 return;
4187 }
4188
4189 d = _d;
4190 }
4191
4192 if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) {
4193 log_error("Failed to allocate set.");
4194 goto finish;
4195 }
4196
4197 while ((de = readdir(d))) {
4198 char *path;
4199 pid_t pid;
4200 int k;
4201
4202 if (ignore_file(de->d_name))
4203 continue;
4204
4205 if (de->d_type != DT_REG &&
4206 de->d_type != DT_LNK &&
4207 de->d_type != DT_UNKNOWN)
4208 continue;
4209
4210 if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) {
4211 log_error("Out of memory");
4212 continue;
4213 }
4214
4215 if ((pid = fork()) < 0) {
4216 log_error("Failed to fork: %m");
4217 free(path);
4218 continue;
4219 }
4220
4221 if (pid == 0) {
4222 char *_argv[2];
4223 /* Child */
4224
4225 if (!argv) {
4226 _argv[0] = path;
4227 _argv[1] = NULL;
4228 argv = _argv;
4229 } else
4230 if (!argv[0])
4231 argv[0] = path;
4232
4233 execv(path, argv);
4234
4235 log_error("Failed to execute %s: %m", path);
4236 _exit(EXIT_FAILURE);
4237 }
4238
4239 log_debug("Spawned %s as %lu", path, (unsigned long) pid);
4240
4241 if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) {
4242 log_error("Failed to add PID to set: %s", strerror(-k));
4243 free(path);
4244 }
4245 }
4246
4247 while (!hashmap_isempty(pids)) {
4248 siginfo_t si;
4249 char *path;
4250
4251 zero(si);
4252 if (waitid(P_ALL, 0, &si, WEXITED) < 0) {
4253
4254 if (errno == EINTR)
4255 continue;
4256
4257 log_error("waitid() failed: %m");
4258 goto finish;
4259 }
4260
4261 if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) {
4262 if (!is_clean_exit(si.si_code, si.si_status)) {
4263 if (si.si_code == CLD_EXITED)
4264 log_error("%s exited with exit status %i.", path, si.si_status);
4265 else
4266 log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status));
4267 } else
4268 log_debug("%s exited successfully.", path);
4269
4270 free(path);
4271 }
4272 }
4273
4274finish:
4275 if (_d)
4276 closedir(_d);
4277
4278 if (pids)
4279 hashmap_free_free(pids);
4280}
4281
430c18ed
LP		 4282int kill_and_sigcont(pid_t pid, int sig) {
4283 int r;
4284
4285 r = kill(pid, sig) < 0 ? -errno : 0;
4286
4287 if (r >= 0)
4288 kill(pid, SIGCONT);
4289
4290 return r;
4291}
4292
05feefe0
LP		 4293bool nulstr_contains(const char*nulstr, const char *needle) {
4294 const char *i;
4295
4296 if (!nulstr)
4297 return false;
4298
4299 NULSTR_FOREACH(i, nulstr)
4300 if (streq(i, needle))
4301 return true;
4302
4303 return false;
4304}
4305
6faa1114 4306bool plymouth_running(void) {
9408a2d2 4307 return access("/run/plymouth/pid", F_OK) >= 0;
6faa1114
LP		 4308}
4309
7c3b203c
LP		 4310void parse_syslog_priority(char **p, int *priority) {
4311 int a = 0, b = 0, c = 0;
4312 int k;
4313
4314 assert(p);
4315 assert(*p);
4316 assert(priority);
4317
4318 if ((*p)[0] != '<')
4319 return;
4320
4321 if (!strchr(*p, '>'))
4322 return;
4323
4324 if ((*p)[2] == '>') {
4325 c = undecchar((*p)[1]);
4326 k = 3;
4327 } else if ((*p)[3] == '>') {
4328 b = undecchar((*p)[1]);
4329 c = undecchar((*p)[2]);
4330 k = 4;
4331 } else if ((*p)[4] == '>') {
4332 a = undecchar((*p)[1]);
4333 b = undecchar((*p)[2]);
4334 c = undecchar((*p)[3]);
4335 k = 5;
4336 } else
4337 return;
4338
4339 if (a < 0 || b < 0 || c < 0)
4340 return;
4341
4342 *priority = a*100+b*10+c;
4343 *p += k;
4344}
4345
ac123445
LP		 4346int have_effective_cap(int value) {
4347 cap_t cap;
4348 cap_flag_value_t fv;
4349 int r;
4350
4351 if (!(cap = cap_get_proc()))
4352 return -errno;
4353
4354 if (cap_get_flag(cap, value, CAP_EFFECTIVE, &fv) < 0)
4355 r = -errno;
4356 else
4357 r = fv == CAP_SET;
4358
4359 cap_free(cap);
4360 return r;
4361}
4362
9beb3f4d
LP		 4363char* strshorten(char *s, size_t l) {
4364 assert(s);
4365
4366 if (l < strlen(s))
4367 s[l] = 0;
4368
4369 return s;
4370}
4371
4372static bool hostname_valid_char(char c) {
4373 return
4374 (c >= 'a' && c <= 'z') ||
4375 (c >= 'A' && c <= 'Z') ||
4376 (c >= '0' && c <= '9') ||
4377 c == '-' ||
4378 c == '_' ||
4379 c == '.';
4380}
4381
4382bool hostname_is_valid(const char *s) {
4383 const char *p;
4384
4385 if (isempty(s))
4386 return false;
4387
4388 for (p = s; *p; p++)
4389 if (!hostname_valid_char(*p))
4390 return false;
4391
4392 if (p-s > HOST_NAME_MAX)
4393 return false;
4394
4395 return true;
4396}
4397
4398char* hostname_cleanup(char *s) {
4399 char *p, *d;
4400
4401 for (p = s, d = s; *p; p++)
4402 if ((*p >= 'a' && *p <= 'z') ||
4403 (*p >= 'A' && *p <= 'Z') ||
4404 (*p >= '0' && *p <= '9') ||
4405 *p == '-' ||
4406 *p == '_' ||
4407 *p == '.')
4408 *(d++) = *p;
4409
4410 *d = 0;
4411
4412 strshorten(s, HOST_NAME_MAX);
4413 return s;
4414}
4415
1dccbe19
LP		 4416static const char *const ioprio_class_table[] = {
4417 [IOPRIO_CLASS_NONE] = "none",
4418 [IOPRIO_CLASS_RT] = "realtime",
4419 [IOPRIO_CLASS_BE] = "best-effort",
4420 [IOPRIO_CLASS_IDLE] = "idle"
4421};
4422
4423DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int);
4424
4425static const char *const sigchld_code_table[] = {
4426 [CLD_EXITED] = "exited",
4427 [CLD_KILLED] = "killed",
4428 [CLD_DUMPED] = "dumped",
4429 [CLD_TRAPPED] = "trapped",
4430 [CLD_STOPPED] = "stopped",
4431 [CLD_CONTINUED] = "continued",
4432};
4433
4434DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
4435
7d76f312 4436static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = {
1dccbe19
LP		 4437 [LOG_FAC(LOG_KERN)] = "kern",
4438 [LOG_FAC(LOG_USER)] = "user",
4439 [LOG_FAC(LOG_MAIL)] = "mail",
4440 [LOG_FAC(LOG_DAEMON)] = "daemon",
4441 [LOG_FAC(LOG_AUTH)] = "auth",
4442 [LOG_FAC(LOG_SYSLOG)] = "syslog",
4443 [LOG_FAC(LOG_LPR)] = "lpr",
4444 [LOG_FAC(LOG_NEWS)] = "news",
4445 [LOG_FAC(LOG_UUCP)] = "uucp",
4446 [LOG_FAC(LOG_CRON)] = "cron",
4447 [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
4448 [LOG_FAC(LOG_FTP)] = "ftp",
4449 [LOG_FAC(LOG_LOCAL0)] = "local0",
4450 [LOG_FAC(LOG_LOCAL1)] = "local1",
4451 [LOG_FAC(LOG_LOCAL2)] = "local2",
4452 [LOG_FAC(LOG_LOCAL3)] = "local3",
4453 [LOG_FAC(LOG_LOCAL4)] = "local4",
4454 [LOG_FAC(LOG_LOCAL5)] = "local5",
4455 [LOG_FAC(LOG_LOCAL6)] = "local6",
4456 [LOG_FAC(LOG_LOCAL7)] = "local7"
4457};
4458
7d76f312 4459DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int);
1dccbe19
LP		 4460
4461static const char *const log_level_table[] = {
4462 [LOG_EMERG] = "emerg",
4463 [LOG_ALERT] = "alert",
4464 [LOG_CRIT] = "crit",
4465 [LOG_ERR] = "err",
4466 [LOG_WARNING] = "warning",
4467 [LOG_NOTICE] = "notice",
4468 [LOG_INFO] = "info",
4469 [LOG_DEBUG] = "debug"
4470};
4471
4472DEFINE_STRING_TABLE_LOOKUP(log_level, int);
4473
4474static const char* const sched_policy_table[] = {
4475 [SCHED_OTHER] = "other",
4476 [SCHED_BATCH] = "batch",
4477 [SCHED_IDLE] = "idle",
4478 [SCHED_FIFO] = "fifo",
4479 [SCHED_RR] = "rr"
4480};
4481
4482DEFINE_STRING_TABLE_LOOKUP(sched_policy, int);
4483
4484static const char* const rlimit_table[] = {
4485 [RLIMIT_CPU] = "LimitCPU",
4486 [RLIMIT_FSIZE] = "LimitFSIZE",
4487 [RLIMIT_DATA] = "LimitDATA",
4488 [RLIMIT_STACK] = "LimitSTACK",
4489 [RLIMIT_CORE] = "LimitCORE",
4490 [RLIMIT_RSS] = "LimitRSS",
4491 [RLIMIT_NOFILE] = "LimitNOFILE",
4492 [RLIMIT_AS] = "LimitAS",
4493 [RLIMIT_NPROC] = "LimitNPROC",
4494 [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
4495 [RLIMIT_LOCKS] = "LimitLOCKS",
4496 [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
4497 [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
4498 [RLIMIT_NICE] = "LimitNICE",
4499 [RLIMIT_RTPRIO] = "LimitRTPRIO",
4500 [RLIMIT_RTTIME] = "LimitRTTIME"
4501};
4502
4503DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
4fd5948e
LP		 4504
4505static const char* const ip_tos_table[] = {
4506 [IPTOS_LOWDELAY] = "low-delay",
4507 [IPTOS_THROUGHPUT] = "throughput",
4508 [IPTOS_RELIABILITY] = "reliability",
4509 [IPTOS_LOWCOST] = "low-cost",
4510};
4511
4512DEFINE_STRING_TABLE_LOOKUP(ip_tos, int);
2e22afe9
LP		 4513
4514static const char *const signal_table[] = {
4515 [SIGHUP] = "HUP",
4516 [SIGINT] = "INT",
4517 [SIGQUIT] = "QUIT",
4518 [SIGILL] = "ILL",
4519 [SIGTRAP] = "TRAP",
4520 [SIGABRT] = "ABRT",
4521 [SIGBUS] = "BUS",
4522 [SIGFPE] = "FPE",
4523 [SIGKILL] = "KILL",
4524 [SIGUSR1] = "USR1",
4525 [SIGSEGV] = "SEGV",
4526 [SIGUSR2] = "USR2",
4527 [SIGPIPE] = "PIPE",
4528 [SIGALRM] = "ALRM",
4529 [SIGTERM] = "TERM",
f26ee0b9
LP		 4530#ifdef SIGSTKFLT
4531 [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */
4532#endif
2e22afe9
LP		 4533 [SIGCHLD] = "CHLD",
4534 [SIGCONT] = "CONT",
4535 [SIGSTOP] = "STOP",
4536 [SIGTSTP] = "TSTP",
4537 [SIGTTIN] = "TTIN",
4538 [SIGTTOU] = "TTOU",
4539 [SIGURG] = "URG",
4540 [SIGXCPU] = "XCPU",
4541 [SIGXFSZ] = "XFSZ",
4542 [SIGVTALRM] = "VTALRM",
4543 [SIGPROF] = "PROF",
4544 [SIGWINCH] = "WINCH",
4545 [SIGIO] = "IO",
4546 [SIGPWR] = "PWR",
4547 [SIGSYS] = "SYS"
4548};
4549
4550DEFINE_STRING_TABLE_LOOKUP(signal, int);
db1413d7
KS		 4551
4552static int file_is_conf(const struct dirent *d, const char *suffix) {
4553 assert(d);
4554
4555 if (ignore_file(d->d_name))
4556 return 0;
4557
4558 if (d->d_type != DT_REG &&
4559 d->d_type != DT_LNK &&
4560 d->d_type != DT_UNKNOWN)
4561 return 0;
4562
4563 return endswith(d->d_name, suffix);
4564}
4565
4566static int files_add(Hashmap *h, const char *path, const char *suffix) {
4567 DIR *dir;
4568 struct dirent *de;
4569 int r = 0;
4570
4571 dir = opendir(path);
4572 if (!dir) {
4573 if (errno == ENOENT)
4574 return 0;
4575 return -errno;
4576 }
4577
4578 for (de = readdir(dir); de; de = readdir(dir)) {
223a3558 4579 char *p, *f;
db1413d7
KS		 4580 const char *base;
4581
4582 if (!file_is_conf(de, suffix))
4583 continue;
4584
223a3558 4585 if (asprintf(&p, "%s/%s", path, de->d_name) < 0) {
db1413d7
KS		 4586 r = -ENOMEM;
4587 goto finish;
4588 }
4589
223a3558
KS		 4590 f = canonicalize_file_name(p);
4591 if (!f) {
4592 log_error("Failed to canonicalize file name '%s': %m", p);
4593 free(p);
4594 continue;
4595 }
4596 free(p);
4597
db1413d7
KS		 4598 log_debug("found: %s\n", f);
4599 base = f + strlen(path) + 1;
4600 if (hashmap_put(h, base, f) <= 0)
4601 free(f);
4602 }
4603
4604finish:
4605 closedir(dir);
4606 return r;
4607}
4608
4609static int base_cmp(const void *a, const void *b) {
4610 const char *s1, *s2;
4611
4612 s1 = *(char * const *)a;
4613 s2 = *(char * const *)b;
4614 return strcmp(file_name_from_path(s1), file_name_from_path(s2));
4615}
4616
44143309 4617int conf_files_list(char ***strv, const char *suffix, const char *dir, ...) {
223a3558
KS		 4618 Hashmap *fh = NULL;
4619 char **dirs = NULL;
db1413d7 4620 char **files = NULL;
223a3558 4621 char **p;
db1413d7 4622 va_list ap;
44143309 4623 int r = 0;
db1413d7 4624
223a3558
KS		 4625 va_start(ap, dir);
4626 dirs = strv_new_ap(dir, ap);
4627 va_end(ap);
4628 if (!dirs) {
4629 r = -ENOMEM;
4630 goto finish;
4631 }
4632 if (!strv_path_canonicalize(dirs)) {
4633 r = -ENOMEM;
4634 goto finish;
4635 }
4636 if (!strv_uniq(dirs)) {
4637 r = -ENOMEM;
4638 goto finish;
4639 }
4640
db1413d7
KS		 4641 fh = hashmap_new(string_hash_func, string_compare_func);
4642 if (!fh) {
44143309 4643 r = -ENOMEM;
db1413d7
KS		 4644 goto finish;
4645 }
4646
223a3558
KS		 4647 STRV_FOREACH(p, dirs) {
4648 if (files_add(fh, *p, suffix) < 0) {
db1413d7 4649 log_error("Failed to search for files.");
44143309 4650 r = -EINVAL;
db1413d7
KS		 4651 goto finish;
4652 }
db1413d7 4653 }
db1413d7
KS		 4654
4655 files = hashmap_get_strv(fh);
4656 if (files == NULL) {
4657 log_error("Failed to compose list of files.");
44143309 4658 r = -ENOMEM;
db1413d7
KS		 4659 goto finish;
4660 }
4661
4662 qsort(files, hashmap_size(fh), sizeof(char *), base_cmp);
4663finish:
223a3558 4664 strv_free(dirs);
db1413d7 4665 hashmap_free(fh);
44143309
KS		 4666 *strv = files;
4667 return r;
db1413d7 4668}
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