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util: fix switching to console unicode mode
[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>
7948c4df
KS		 54#include <sys/time.h>
55#include <linux/rtc.h>
8092a428 56#include <glob.h>
4b67834e 57#include <grp.h>
87d2c1ff 58#include <sys/mman.h>
60918275
LP		 59
60#include "macro.h"
61#include "util.h"
1dccbe19
LP		 62#include "ioprio.h"
63#include "missing.h"
a9f5d454 64#include "log.h"
65d2ebdc 65#include "strv.h"
e51bc1a2 66#include "label.h"
d06dacd0 67#include "exit-status.h"
83cc030f 68#include "hashmap.h"
56cf987f 69
9a0e6896
LP		 70int saved_argc = 0;
71char **saved_argv = NULL;
72
37f85e66 73size_t page_size(void) {
74 static __thread size_t pgsz = 0;
75 long r;
76
87d2c1ff 77 if (_likely_(pgsz > 0))
37f85e66 78 return pgsz;
79
80 assert_se((r = sysconf(_SC_PAGESIZE)) > 0);
81
82 pgsz = (size_t) r;
83
84 return pgsz;
85}
86
e05797fb
LP		 87bool streq_ptr(const char *a, const char *b) {
88
89 /* Like streq(), but tries to make sense of NULL pointers */
90
91 if (a && b)
92 return streq(a, b);
93
94 if (!a && !b)
95 return true;
96
97 return false;
98}
99
47be870b 100usec_t now(clockid_t clock_id) {
60918275
LP		 101 struct timespec ts;
102
47be870b 103 assert_se(clock_gettime(clock_id, &ts) == 0);
60918275
LP		 104
105 return timespec_load(&ts);
106}
107
63983207 108dual_timestamp* dual_timestamp_get(dual_timestamp *ts) {
871d7de4
LP		 109 assert(ts);
110
111 ts->realtime = now(CLOCK_REALTIME);
112 ts->monotonic = now(CLOCK_MONOTONIC);
113
114 return ts;
115}
116
a185c5aa
LP		 117dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) {
118 int64_t delta;
119 assert(ts);
120
121 ts->realtime = u;
122
123 if (u == 0)
124 ts->monotonic = 0;
125 else {
126 delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u;
127
128 ts->monotonic = now(CLOCK_MONOTONIC);
129
130 if ((int64_t) ts->monotonic > delta)
131 ts->monotonic -= delta;
132 else
133 ts->monotonic = 0;
134 }
135
136 return ts;
137}
138
60918275
LP		 139usec_t timespec_load(const struct timespec *ts) {
140 assert(ts);
141
142 return
143 (usec_t) ts->tv_sec * USEC_PER_SEC +
144 (usec_t) ts->tv_nsec / NSEC_PER_USEC;
145}
146
147struct timespec *timespec_store(struct timespec *ts, usec_t u) {
148 assert(ts);
149
150 ts->tv_sec = (time_t) (u / USEC_PER_SEC);
151 ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
152
153 return ts;
154}
155
156usec_t timeval_load(const struct timeval *tv) {
157 assert(tv);
158
159 return
160 (usec_t) tv->tv_sec * USEC_PER_SEC +
161 (usec_t) tv->tv_usec;
162}
163
164struct timeval *timeval_store(struct timeval *tv, usec_t u) {
165 assert(tv);
166
167 tv->tv_sec = (time_t) (u / USEC_PER_SEC);
168 tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
169
170 return tv;
171}
172
173bool endswith(const char *s, const char *postfix) {
174 size_t sl, pl;
175
176 assert(s);
177 assert(postfix);
178
179 sl = strlen(s);
180 pl = strlen(postfix);
181
d4d0d4db
LP		 182 if (pl == 0)
183 return true;
184
60918275
LP		 185 if (sl < pl)
186 return false;
187
188 return memcmp(s + sl - pl, postfix, pl) == 0;
189}
190
191bool startswith(const char *s, const char *prefix) {
192 size_t sl, pl;
193
194 assert(s);
195 assert(prefix);
196
197 sl = strlen(s);
198 pl = strlen(prefix);
199
d4d0d4db
LP		 200 if (pl == 0)
201 return true;
202
60918275
LP		 203 if (sl < pl)
204 return false;
205
206 return memcmp(s, prefix, pl) == 0;
207}
208
3177a7fa
MAP		 209bool startswith_no_case(const char *s, const char *prefix) {
210 size_t sl, pl;
211 unsigned i;
212
213 assert(s);
214 assert(prefix);
215
216 sl = strlen(s);
217 pl = strlen(prefix);
218
219 if (pl == 0)
220 return true;
221
222 if (sl < pl)
223 return false;
224
225 for(i = 0; i < pl; ++i) {
226 if (tolower(s[i]) != tolower(prefix[i]))
227 return false;
228 }
229
230 return true;
231}
232
79d6d816
LP		 233bool first_word(const char *s, const char *word) {
234 size_t sl, wl;
235
236 assert(s);
237 assert(word);
238
239 sl = strlen(s);
240 wl = strlen(word);
241
242 if (sl < wl)
243 return false;
244
d4d0d4db
LP		 245 if (wl == 0)
246 return true;
247
79d6d816
LP		 248 if (memcmp(s, word, wl) != 0)
249 return false;
250
d4d0d4db
LP		 251 return s[wl] == 0 ||
252 strchr(WHITESPACE, s[wl]);
79d6d816
LP		 253}
254
42f4e3c4 255int close_nointr(int fd) {
60918275
LP		 256 assert(fd >= 0);
257
258 for (;;) {
259 int r;
260
48f82119
LP		 261 r = close(fd);
262 if (r >= 0)
60918275
LP		 263 return r;
264
265 if (errno != EINTR)
48f82119 266 return -errno;
60918275
LP		 267 }
268}
85261803 269
85f136b5 270void close_nointr_nofail(int fd) {
80876c20 271 int saved_errno = errno;
85f136b5
LP		 272
273 /* like close_nointr() but cannot fail, and guarantees errno
274 * is unchanged */
275
276 assert_se(close_nointr(fd) == 0);
80876c20
LP		 277
278 errno = saved_errno;
85f136b5
LP		 279}
280
5b6319dc
LP		 281void close_many(const int fds[], unsigned n_fd) {
282 unsigned i;
283
284 for (i = 0; i < n_fd; i++)
285 close_nointr_nofail(fds[i]);
286}
287
85261803
LP		 288int parse_boolean(const char *v) {
289 assert(v);
290
44d8db9e 291 if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
85261803 292 return 1;
44d8db9e 293 else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
85261803
LP		 294 return 0;
295
296 return -EINVAL;
297}
298
3ba686c1 299int parse_pid(const char *s, pid_t* ret_pid) {
0b172489 300 unsigned long ul = 0;
3ba686c1
LP		 301 pid_t pid;
302 int r;
303
304 assert(s);
305 assert(ret_pid);
306
307 if ((r = safe_atolu(s, &ul)) < 0)
308 return r;
309
310 pid = (pid_t) ul;
311
312 if ((unsigned long) pid != ul)
313 return -ERANGE;
314
315 if (pid <= 0)
316 return -ERANGE;
317
318 *ret_pid = pid;
319 return 0;
320}
321
034a2a52
LP		 322int parse_uid(const char *s, uid_t* ret_uid) {
323 unsigned long ul = 0;
324 uid_t uid;
325 int r;
326
327 assert(s);
328 assert(ret_uid);
329
330 if ((r = safe_atolu(s, &ul)) < 0)
331 return r;
332
333 uid = (uid_t) ul;
334
335 if ((unsigned long) uid != ul)
336 return -ERANGE;
337
338 *ret_uid = uid;
339 return 0;
340}
341
85261803
LP		 342int safe_atou(const char *s, unsigned *ret_u) {
343 char *x = NULL;
034c6ed7 344 unsigned long l;
85261803
LP		 345
346 assert(s);
347 assert(ret_u);
348
349 errno = 0;
350 l = strtoul(s, &x, 0);
351
352 if (!x || *x || errno)
353 return errno ? -errno : -EINVAL;
354
034c6ed7 355 if ((unsigned long) (unsigned) l != l)
85261803
LP		 356 return -ERANGE;
357
358 *ret_u = (unsigned) l;
359 return 0;
360}
361
362int safe_atoi(const char *s, int *ret_i) {
363 char *x = NULL;
034c6ed7 364 long l;
85261803
LP		 365
366 assert(s);
367 assert(ret_i);
368
369 errno = 0;
370 l = strtol(s, &x, 0);
371
372 if (!x || *x || errno)
373 return errno ? -errno : -EINVAL;
374
034c6ed7 375 if ((long) (int) l != l)
85261803
LP		 376 return -ERANGE;
377
034c6ed7
LP		 378 *ret_i = (int) l;
379 return 0;
380}
381
034c6ed7
LP		 382int safe_atollu(const char *s, long long unsigned *ret_llu) {
383 char *x = NULL;
384 unsigned long long l;
385
386 assert(s);
387 assert(ret_llu);
388
389 errno = 0;
390 l = strtoull(s, &x, 0);
391
392 if (!x || *x || errno)
393 return errno ? -errno : -EINVAL;
394
395 *ret_llu = l;
396 return 0;
397}
398
399int safe_atolli(const char *s, long long int *ret_lli) {
400 char *x = NULL;
401 long long l;
402
403 assert(s);
404 assert(ret_lli);
405
406 errno = 0;
407 l = strtoll(s, &x, 0);
408
409 if (!x || *x || errno)
410 return errno ? -errno : -EINVAL;
411
412 *ret_lli = l;
85261803
LP		 413 return 0;
414}
a41e8209 415
a41e8209 416/* Split a string into words. */
65d2ebdc 417char *split(const char *c, size_t *l, const char *separator, char **state) {
a41e8209
LP		 418 char *current;
419
420 current = *state ? *state : (char*) c;
421
422 if (!*current || *c == 0)
423 return NULL;
424
65d2ebdc
LP		 425 current += strspn(current, separator);
426 *l = strcspn(current, separator);
82919e3d
LP		 427 *state = current+*l;
428
429 return (char*) current;
430}
431
034c6ed7
LP		 432/* Split a string into words, but consider strings enclosed in '' and
433 * "" as words even if they include spaces. */
434char *split_quoted(const char *c, size_t *l, char **state) {
0bab36f2
LP		 435 char *current, *e;
436 bool escaped = false;
034c6ed7
LP		 437
438 current = *state ? *state : (char*) c;
439
440 if (!*current || *c == 0)
441 return NULL;
442
443 current += strspn(current, WHITESPACE);
444
445 if (*current == '\'') {
446 current ++;
034c6ed7 447
0bab36f2
LP		 448 for (e = current; *e; e++) {
449 if (escaped)
450 escaped = false;
451 else if (*e == '\\')
452 escaped = true;
453 else if (*e == '\'')
454 break;
455 }
456
457 *l = e-current;
458 *state = *e == 0 ? e : e+1;
034c6ed7
LP		 459 } else if (*current == '\"') {
460 current ++;
034c6ed7 461
0bab36f2
LP		 462 for (e = current; *e; e++) {
463 if (escaped)
464 escaped = false;
465 else if (*e == '\\')
466 escaped = true;
467 else if (*e == '\"')
468 break;
469 }
470
471 *l = e-current;
472 *state = *e == 0 ? e : e+1;
034c6ed7 473 } else {
0bab36f2
LP		 474 for (e = current; *e; e++) {
475 if (escaped)
476 escaped = false;
477 else if (*e == '\\')
478 escaped = true;
479 else if (strchr(WHITESPACE, *e))
480 break;
481 }
482 *l = e-current;
483 *state = e;
034c6ed7
LP		 484 }
485
486 return (char*) current;
487}
488
65d2ebdc
LP		 489char **split_path_and_make_absolute(const char *p) {
490 char **l;
491 assert(p);
492
493 if (!(l = strv_split(p, ":")))
494 return NULL;
495
496 if (!strv_path_make_absolute_cwd(l)) {
497 strv_free(l);
498 return NULL;
499 }
500
501 return l;
502}
503
034c6ed7
LP		 504int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
505 int r;
506 FILE *f;
20c03b7b 507 char fn[PATH_MAX], line[LINE_MAX], *p;
bb00e604 508 long unsigned ppid;
034c6ed7 509
8480e784 510 assert(pid > 0);
034c6ed7
LP		 511 assert(_ppid);
512
bb00e604 513 assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1));
8480e784 514 char_array_0(fn);
034c6ed7 515
ccaa6149 516 if (!(f = fopen(fn, "re")))
034c6ed7
LP		 517 return -errno;
518
519 if (!(fgets(line, sizeof(line), f))) {
35d50f55 520 r = feof(f) ? -EIO : -errno;
034c6ed7
LP		 521 fclose(f);
522 return r;
523 }
524
525 fclose(f);
526
527 /* Let's skip the pid and comm fields. The latter is enclosed
528 * in () but does not escape any () in its value, so let's
529 * skip over it manually */
530
531 if (!(p = strrchr(line, ')')))
532 return -EIO;
533
534 p++;
535
536 if (sscanf(p, " "
537 "%*c " /* state */
bb00e604 538 "%lu ", /* ppid */
034c6ed7
LP		 539 &ppid) != 1)
540 return -EIO;
541
bb00e604 542 if ((long unsigned) (pid_t) ppid != ppid)
034c6ed7
LP		 543 return -ERANGE;
544
545 *_ppid = (pid_t) ppid;
546
547 return 0;
548}
549
7640a5de
LP		 550int get_starttime_of_pid(pid_t pid, unsigned long long *st) {
551 int r;
552 FILE *f;
553 char fn[PATH_MAX], line[LINE_MAX], *p;
554
555 assert(pid > 0);
556 assert(st);
557
558 assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1));
559 char_array_0(fn);
560
ccaa6149 561 if (!(f = fopen(fn, "re")))
7640a5de
LP		 562 return -errno;
563
564 if (!(fgets(line, sizeof(line), f))) {
35d50f55 565 r = feof(f) ? -EIO : -errno;
7640a5de
LP		 566 fclose(f);
567 return r;
568 }
569
570 fclose(f);
571
572 /* Let's skip the pid and comm fields. The latter is enclosed
573 * in () but does not escape any () in its value, so let's
574 * skip over it manually */
575
576 if (!(p = strrchr(line, ')')))
577 return -EIO;
578
579 p++;
580
581 if (sscanf(p, " "
582 "%*c " /* state */
583 "%*d " /* ppid */
584 "%*d " /* pgrp */
585 "%*d " /* session */
586 "%*d " /* tty_nr */
587 "%*d " /* tpgid */
588 "%*u " /* flags */
589 "%*u " /* minflt */
590 "%*u " /* cminflt */
591 "%*u " /* majflt */
592 "%*u " /* cmajflt */
593 "%*u " /* utime */
594 "%*u " /* stime */
595 "%*d " /* cutime */
596 "%*d " /* cstime */
597 "%*d " /* priority */
598 "%*d " /* nice */
599 "%*d " /* num_threads */
600 "%*d " /* itrealvalue */
601 "%llu " /* starttime */,
602 st) != 1)
603 return -EIO;
604
605 return 0;
606}
607
034c6ed7
LP		 608int write_one_line_file(const char *fn, const char *line) {
609 FILE *f;
610 int r;
611
612 assert(fn);
613 assert(line);
614
615 if (!(f = fopen(fn, "we")))
616 return -errno;
617
34ca941c 618 errno = 0;
034c6ed7
LP		 619 if (fputs(line, f) < 0) {
620 r = -errno;
621 goto finish;
622 }
623
8e1bd70d
LP		 624 if (!endswith(line, "\n"))
625 fputc('\n', f);
626
151b190e
LP		 627 fflush(f);
628
629 if (ferror(f)) {
630 if (errno != 0)
631 r = -errno;
632 else
633 r = -EIO;
634 } else
635 r = 0;
636
034c6ed7
LP		 637finish:
638 fclose(f);
639 return r;
640}
641
34ca941c
LP		 642int fchmod_umask(int fd, mode_t m) {
643 mode_t u;
644 int r;
645
646 u = umask(0777);
647 r = fchmod(fd, m & (~u)) < 0 ? -errno : 0;
648 umask(u);
649
650 return r;
651}
652
653int write_one_line_file_atomic(const char *fn, const char *line) {
654 FILE *f;
655 int r;
656 char *p;
657
658 assert(fn);
659 assert(line);
660
661 r = fopen_temporary(fn, &f, &p);
662 if (r < 0)
663 return r;
664
665 fchmod_umask(fileno(f), 0644);
666
667 errno = 0;
668 if (fputs(line, f) < 0) {
669 r = -errno;
670 goto finish;
671 }
672
673 if (!endswith(line, "\n"))
674 fputc('\n', f);
675
676 fflush(f);
677
678 if (ferror(f)) {
679 if (errno != 0)
680 r = -errno;
681 else
682 r = -EIO;
683 } else {
684 if (rename(p, fn) < 0)
685 r = -errno;
686 else
687 r = 0;
688 }
689
690finish:
691 if (r < 0)
692 unlink(p);
693
694 fclose(f);
695 free(p);
696
697 return r;
698}
699
034c6ed7
LP		 700int read_one_line_file(const char *fn, char **line) {
701 FILE *f;
702 int r;
97c4a07d 703 char t[LINE_MAX], *c;
034c6ed7
LP		 704
705 assert(fn);
706 assert(line);
707
708 if (!(f = fopen(fn, "re")))
709 return -errno;
710
711 if (!(fgets(t, sizeof(t), f))) {
35d50f55 712 r = feof(f) ? -EIO : -errno;
034c6ed7
LP		 713 goto finish;
714 }
715
716 if (!(c = strdup(t))) {
717 r = -ENOMEM;
718 goto finish;
719 }
720
6f9a471a
LP		 721 truncate_nl(c);
722
034c6ed7
LP		 723 *line = c;
724 r = 0;
725
726finish:
727 fclose(f);
728 return r;
729}
44d8db9e 730
34ca941c 731int read_full_file(const char *fn, char **contents, size_t *size) {
97c4a07d
LP		 732 FILE *f;
733 int r;
734 size_t n, l;
735 char *buf = NULL;
736 struct stat st;
737
738 if (!(f = fopen(fn, "re")))
739 return -errno;
740
741 if (fstat(fileno(f), &st) < 0) {
742 r = -errno;
743 goto finish;
744 }
745
34ca941c
LP		 746 /* Safety check */
747 if (st.st_size > 4*1024*1024) {
748 r = -E2BIG;
749 goto finish;
750 }
751
97c4a07d
LP		 752 n = st.st_size > 0 ? st.st_size : LINE_MAX;
753 l = 0;
754
755 for (;;) {
756 char *t;
757 size_t k;
758
759 if (!(t = realloc(buf, n+1))) {
760 r = -ENOMEM;
761 goto finish;
762 }
763
764 buf = t;
765 k = fread(buf + l, 1, n - l, f);
766
767 if (k <= 0) {
768 if (ferror(f)) {
769 r = -errno;
770 goto finish;
771 }
772
773 break;
774 }
775
776 l += k;
777 n *= 2;
778
779 /* Safety check */
780 if (n > 4*1024*1024) {
781 r = -E2BIG;
782 goto finish;
783 }
784 }
785
f8440af5 786 buf[l] = 0;
97c4a07d
LP		 787 *contents = buf;
788 buf = NULL;
789
34ca941c
LP		 790 if (size)
791 *size = l;
792
97c4a07d
LP		 793 r = 0;
794
795finish:
796 fclose(f);
797 free(buf);
798
799 return r;
800}
801
802int parse_env_file(
803 const char *fname,
c899f8c6 804 const char *separator, ...) {
97c4a07d 805
ce8a6aa1 806 int r = 0;
44d91056 807 char *contents = NULL, *p;
97c4a07d
LP		 808
809 assert(fname);
c899f8c6 810 assert(separator);
97c4a07d 811
34ca941c 812 if ((r = read_full_file(fname, &contents, NULL)) < 0)
97c4a07d
LP		 813 return r;
814
815 p = contents;
816 for (;;) {
817 const char *key = NULL;
818
c899f8c6 819 p += strspn(p, separator);
97c4a07d
LP		 820 p += strspn(p, WHITESPACE);
821
822 if (!*p)
823 break;
824
825 if (!strchr(COMMENTS, *p)) {
826 va_list ap;
827 char **value;
828
c899f8c6 829 va_start(ap, separator);
97c4a07d
LP		 830 while ((key = va_arg(ap, char *))) {
831 size_t n;
832 char *v;
833
834 value = va_arg(ap, char **);
835
836 n = strlen(key);
837 if (strncmp(p, key, n) != 0 ||
838 p[n] != '=')
839 continue;
840
841 p += n + 1;
c899f8c6 842 n = strcspn(p, separator);
97c4a07d
LP		 843
844 if (n >= 2 &&
e7db37dd
LP		 845 strchr(QUOTES, p[0]) &&
846 p[n-1] == p[0])
97c4a07d
LP		 847 v = strndup(p+1, n-2);
848 else
849 v = strndup(p, n);
850
851 if (!v) {
852 r = -ENOMEM;
853 va_end(ap);
854 goto fail;
855 }
856
dd36de4d
KS		 857 if (v[0] == '\0') {
858 /* return empty value strings as NULL */
859 free(v);
860 v = NULL;
861 }
862
97c4a07d
LP		 863 free(*value);
864 *value = v;
865
866 p += n;
ce8a6aa1
LP		 867
868 r ++;
97c4a07d
LP		 869 break;
870 }
871 va_end(ap);
872 }
873
874 if (!key)
c899f8c6 875 p += strcspn(p, separator);
97c4a07d
LP		 876 }
877
97c4a07d
LP		 878fail:
879 free(contents);
880 return r;
881}
882
8c7be95e
LP		 883int load_env_file(
884 const char *fname,
885 char ***rl) {
886
887 FILE *f;
888 char **m = 0;
889 int r;
890
891 assert(fname);
892 assert(rl);
893
894 if (!(f = fopen(fname, "re")))
895 return -errno;
896
897 while (!feof(f)) {
898 char l[LINE_MAX], *p, *u;
899 char **t;
900
901 if (!fgets(l, sizeof(l), f)) {
902 if (feof(f))
903 break;
904
905 r = -errno;
906 goto finish;
907 }
908
909 p = strstrip(l);
910
911 if (!*p)
912 continue;
913
914 if (strchr(COMMENTS, *p))
915 continue;
916
917 if (!(u = normalize_env_assignment(p))) {
918 log_error("Out of memory");
919 r = -ENOMEM;
920 goto finish;
921 }
922
923 t = strv_append(m, u);
924 free(u);
925
926 if (!t) {
927 log_error("Out of memory");
928 r = -ENOMEM;
929 goto finish;
930 }
931
932 strv_free(m);
933 m = t;
934 }
935
936 r = 0;
937
938 *rl = m;
939 m = NULL;
940
941finish:
942 if (f)
943 fclose(f);
944
945 strv_free(m);
946
947 return r;
948}
949
7640a5de 950int write_env_file(const char *fname, char **l) {
34ca941c 951 char **i, *p;
7640a5de
LP		 952 FILE *f;
953 int r;
954
34ca941c
LP		 955 r = fopen_temporary(fname, &f, &p);
956 if (r < 0)
957 return r;
7640a5de 958
34ca941c
LP		 959 fchmod_umask(fileno(f), 0644);
960
961 errno = 0;
7640a5de
LP		 962 STRV_FOREACH(i, l) {
963 fputs(*i, f);
964 fputc('\n', f);
965 }
966
967 fflush(f);
968
34ca941c
LP		 969 if (ferror(f)) {
970 if (errno != 0)
971 r = -errno;
972 else
973 r = -EIO;
974 } else {
975 if (rename(p, fname) < 0)
976 r = -errno;
977 else
978 r = 0;
979 }
980
981 if (r < 0)
982 unlink(p);
983
7640a5de 984 fclose(f);
34ca941c 985 free(p);
7640a5de
LP		 986
987 return r;
988}
989
7072ced8
LP		 990char *truncate_nl(char *s) {
991 assert(s);
992
993 s[strcspn(s, NEWLINE)] = 0;
994 return s;
995}
996
87d2c1ff 997int get_process_comm(pid_t pid, char **name) {
7072ced8
LP		 998 int r;
999
7072ced8
LP		 1000 assert(name);
1001
87d2c1ff
LP		 1002 if (pid == 0)
1003 r = read_one_line_file("/proc/self/comm", name);
1004 else {
1005 char *p;
1006 if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0)
1007 return -ENOMEM;
7072ced8 1008
87d2c1ff
LP		 1009 r = read_one_line_file(p, name);
1010 free(p);
1011 }
7072ced8 1012
87d2c1ff 1013 return r;
7072ced8
LP		 1014}
1015
87d2c1ff
LP		 1016int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) {
1017 char *r, *k;
c59760ee
LP		 1018 int c;
1019 bool space = false;
1020 size_t left;
1021 FILE *f;
1022
c59760ee
LP		 1023 assert(max_length > 0);
1024 assert(line);
1025
87d2c1ff
LP		 1026 if (pid == 0)
1027 f = fopen("/proc/self/cmdline", "re");
1028 else {
1029 char *p;
1030 if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0)
1031 return -ENOMEM;
c59760ee 1032
87d2c1ff
LP		 1033 f = fopen(p, "re");
1034 free(p);
1035 }
c59760ee
LP		 1036
1037 if (!f)
1038 return -errno;
1039
87d2c1ff
LP		 1040 r = new(char, max_length);
1041 if (!r) {
c59760ee
LP		 1042 fclose(f);
1043 return -ENOMEM;
1044 }
1045
1046 k = r;
1047 left = max_length;
1048 while ((c = getc(f)) != EOF) {
1049
1050 if (isprint(c)) {
1051 if (space) {
1052 if (left <= 4)
1053 break;
1054
1055 *(k++) = ' ';
057fbb58 1056 left--;
c59760ee
LP		 1057 space = false;
1058 }
1059
1060 if (left <= 4)
1061 break;
1062
1063 *(k++) = (char) c;
057fbb58 1064 left--;
c59760ee
LP		 1065 } else
1066 space = true;
1067 }
1068
1069 if (left <= 4) {
1070 size_t n = MIN(left-1, 3U);
1071 memcpy(k, "...", n);
1072 k[n] = 0;
1073 } else
1074 *k = 0;
1075
1076 fclose(f);
1077
35d2e7ec
LP		 1078 /* Kernel threads have no argv[] */
1079 if (r[0] == 0) {
1080 char *t;
1081 int h;
1082
1083 free(r);
1084
87d2c1ff
LP		 1085 if (!comm_fallback)
1086 return -ENOENT;
1087
1088 h = get_process_comm(pid, &t);
1089 if (h < 0)
35d2e7ec
LP		 1090 return h;
1091
87d2c1ff 1092 r = join("[", t, "]", NULL);
35d2e7ec
LP		 1093 free(t);
1094
87d2c1ff 1095 if (!r)
35d2e7ec
LP		 1096 return -ENOMEM;
1097 }
fa776d8e 1098
c59760ee
LP		 1099 *line = r;
1100 return 0;
1101}
1102
87d2c1ff
LP		 1103int get_process_exe(pid_t pid, char **name) {
1104 int r;
1105
1106 assert(name);
1107
1108 if (pid == 0)
1109 r = readlink_malloc("/proc/self/exe", name);
1110 else {
1111 char *p;
1112 if (asprintf(&p, "/proc/%lu/exe", (unsigned long) pid) < 0)
1113 return -ENOMEM;
1114
1115 r = readlink_malloc(p, name);
1116 free(p);
1117 }
1118
1119 return r;
1120}
1121
fab56fc5
LP		 1122char *strnappend(const char *s, const char *suffix, size_t b) {
1123 size_t a;
44d8db9e
LP		 1124 char *r;
1125
fab56fc5
LP		 1126 if (!s && !suffix)
1127 return strdup("");
1128
1129 if (!s)
1130 return strndup(suffix, b);
1131
1132 if (!suffix)
1133 return strdup(s);
1134
44d8db9e
LP		 1135 assert(s);
1136 assert(suffix);
1137
1138 a = strlen(s);
44d8db9e
LP		 1139
1140 if (!(r = new(char, a+b+1)))
1141 return NULL;
1142
1143 memcpy(r, s, a);
1144 memcpy(r+a, suffix, b);
1145 r[a+b] = 0;
1146
1147 return r;
1148}
87f0e418 1149
fab56fc5
LP		 1150char *strappend(const char *s, const char *suffix) {
1151 return strnappend(s, suffix, suffix ? strlen(suffix) : 0);
1152}
1153
87f0e418
LP		 1154int readlink_malloc(const char *p, char **r) {
1155 size_t l = 100;
1156
1157 assert(p);
1158 assert(r);
1159
1160 for (;;) {
1161 char *c;
1162 ssize_t n;
1163
1164 if (!(c = new(char, l)))
1165 return -ENOMEM;
1166
1167 if ((n = readlink(p, c, l-1)) < 0) {
1168 int ret = -errno;
1169 free(c);
1170 return ret;
1171 }
1172
1173 if ((size_t) n < l-1) {
1174 c[n] = 0;
1175 *r = c;
1176 return 0;
1177 }
1178
1179 free(c);
1180 l *= 2;
1181 }
1182}
1183
2c7108c4
LP		 1184int readlink_and_make_absolute(const char *p, char **r) {
1185 char *target, *k;
1186 int j;
1187
1188 assert(p);
1189 assert(r);
1190
1191 if ((j = readlink_malloc(p, &target)) < 0)
1192 return j;
1193
1194 k = file_in_same_dir(p, target);
1195 free(target);
1196
1197 if (!k)
1198 return -ENOMEM;
1199
1200 *r = k;
1201 return 0;
1202}
1203
83096483
LP		 1204int readlink_and_canonicalize(const char *p, char **r) {
1205 char *t, *s;
1206 int j;
1207
1208 assert(p);
1209 assert(r);
1210
1211 j = readlink_and_make_absolute(p, &t);
1212 if (j < 0)
1213 return j;
1214
1215 s = canonicalize_file_name(t);
1216 if (s) {
1217 free(t);
1218 *r = s;
1219 } else
1220 *r = t;
1221
1222 path_kill_slashes(*r);
1223
1224 return 0;
1225}
1226
35d2e7ec
LP		 1227int parent_of_path(const char *path, char **_r) {
1228 const char *e, *a = NULL, *b = NULL, *p;
1229 char *r;
1230 bool slash = false;
1231
1232 assert(path);
1233 assert(_r);
1234
1235 if (!*path)
1236 return -EINVAL;
1237
1238 for (e = path; *e; e++) {
1239
1240 if (!slash && *e == '/') {
1241 a = b;
1242 b = e;
1243 slash = true;
1244 } else if (slash && *e != '/')
1245 slash = false;
1246 }
1247
1248 if (*(e-1) == '/')
1249 p = a;
1250 else
1251 p = b;
1252
1253 if (!p)
1254 return -EINVAL;
1255
1256 if (p == path)
1257 r = strdup("/");
1258 else
1259 r = strndup(path, p-path);
1260
1261 if (!r)
1262 return -ENOMEM;
1263
1264 *_r = r;
1265 return 0;
1266}
1267
1268
87f0e418
LP		 1269char *file_name_from_path(const char *p) {
1270 char *r;
1271
1272 assert(p);
1273
1274 if ((r = strrchr(p, '/')))
1275 return r + 1;
1276
1277 return (char*) p;
1278}
0301abf4
LP		 1279
1280bool path_is_absolute(const char *p) {
1281 assert(p);
1282
1283 return p[0] == '/';
1284}
1285
1286bool is_path(const char *p) {
1287
1288 return !!strchr(p, '/');
1289}
1290
1291char *path_make_absolute(const char *p, const char *prefix) {
0301abf4
LP		 1292 assert(p);
1293
65d2ebdc
LP		 1294 /* Makes every item in the list an absolute path by prepending
1295 * the prefix, if specified and necessary */
1296
0301abf4
LP		 1297 if (path_is_absolute(p) || !prefix)
1298 return strdup(p);
1299
44d91056 1300 return join(prefix, "/", p, NULL);
0301abf4 1301}
2a987ee8 1302
65d2ebdc
LP		 1303char *path_make_absolute_cwd(const char *p) {
1304 char *cwd, *r;
1305
1306 assert(p);
1307
1308 /* Similar to path_make_absolute(), but prefixes with the
1309 * current working directory. */
1310
1311 if (path_is_absolute(p))
1312 return strdup(p);
1313
1314 if (!(cwd = get_current_dir_name()))
1315 return NULL;
1316
1317 r = path_make_absolute(p, cwd);
1318 free(cwd);
1319
1320 return r;
1321}
1322
1323char **strv_path_make_absolute_cwd(char **l) {
1324 char **s;
1325
1326 /* Goes through every item in the string list and makes it
1327 * absolute. This works in place and won't rollback any
1328 * changes on failure. */
1329
1330 STRV_FOREACH(s, l) {
1331 char *t;
1332
1333 if (!(t = path_make_absolute_cwd(*s)))
1334 return NULL;
1335
1336 free(*s);
1337 *s = t;
1338 }
1339
1340 return l;
1341}
1342
c3f6d675
LP		 1343char **strv_path_canonicalize(char **l) {
1344 char **s;
1345 unsigned k = 0;
1346 bool enomem = false;
1347
1348 if (strv_isempty(l))
1349 return l;
1350
1351 /* Goes through every item in the string list and canonicalize
1352 * the path. This works in place and won't rollback any
1353 * changes on failure. */
1354
1355 STRV_FOREACH(s, l) {
1356 char *t, *u;
1357
1358 t = path_make_absolute_cwd(*s);
1359 free(*s);
1360
1361 if (!t) {
1362 enomem = true;
1363 continue;
1364 }
1365
1366 errno = 0;
1367 u = canonicalize_file_name(t);
1368 free(t);
1369
1370 if (!u) {
1371 if (errno == ENOMEM || !errno)
1372 enomem = true;
1373
1374 continue;
1375 }
1376
1377 l[k++] = u;
1378 }
1379
1380 l[k] = NULL;
1381
1382 if (enomem)
1383 return NULL;
1384
1385 return l;
a9dd2082
LP		 1386}
1387
1388char **strv_path_remove_empty(char **l) {
1389 char **f, **t;
1390
1391 if (!l)
1392 return NULL;
1393
1394 for (f = t = l; *f; f++) {
1395
1396 if (dir_is_empty(*f) > 0) {
1397 free(*f);
1398 continue;
1399 }
1400
1401 *(t++) = *f;
1402 }
1403
1404 *t = NULL;
1405 return l;
c3f6d675
LP		 1406}
1407
2a987ee8
LP		 1408int reset_all_signal_handlers(void) {
1409 int sig;
1410
1411 for (sig = 1; sig < _NSIG; sig++) {
1412 struct sigaction sa;
1413
1414 if (sig == SIGKILL || sig == SIGSTOP)
1415 continue;
1416
1417 zero(sa);
1418 sa.sa_handler = SIG_DFL;
431c32bf 1419 sa.sa_flags = SA_RESTART;
2a987ee8
LP		 1420
1421 /* On Linux the first two RT signals are reserved by
1422 * glibc, and sigaction() will return EINVAL for them. */
1423 if ((sigaction(sig, &sa, NULL) < 0))
1424 if (errno != EINVAL)
1425 return -errno;
1426 }
1427
8e274523 1428 return 0;
2a987ee8 1429}
4a72ff34
LP		 1430
1431char *strstrip(char *s) {
57a8eca8 1432 char *e;
4a72ff34
LP		 1433
1434 /* Drops trailing whitespace. Modifies the string in
1435 * place. Returns pointer to first non-space character */
1436
1437 s += strspn(s, WHITESPACE);
1438
57a8eca8
LP		 1439 for (e = strchr(s, 0); e > s; e --)
1440 if (!strchr(WHITESPACE, e[-1]))
1441 break;
4a72ff34 1442
57a8eca8 1443 *e = 0;
4a72ff34
LP		 1444
1445 return s;
4a72ff34
LP		 1446}
1447
ee9b5e01
LP		 1448char *delete_chars(char *s, const char *bad) {
1449 char *f, *t;
1450
1451 /* Drops all whitespace, regardless where in the string */
1452
1453 for (f = s, t = s; *f; f++) {
1454 if (strchr(bad, *f))
1455 continue;
1456
1457 *(t++) = *f;
1458 }
1459
1460 *t = 0;
1461
1462 return s;
1463}
1464
ab1f0633
LP		 1465bool in_charset(const char *s, const char* charset) {
1466 const char *i;
1467
1468 assert(s);
1469 assert(charset);
1470
1471 for (i = s; *i; i++)
1472 if (!strchr(charset, *i))
1473 return false;
1474
1475 return true;
1476}
1477
4a72ff34
LP		 1478char *file_in_same_dir(const char *path, const char *filename) {
1479 char *e, *r;
1480 size_t k;
1481
1482 assert(path);
1483 assert(filename);
1484
1485 /* This removes the last component of path and appends
1486 * filename, unless the latter is absolute anyway or the
1487 * former isn't */
1488
1489 if (path_is_absolute(filename))
1490 return strdup(filename);
1491
1492 if (!(e = strrchr(path, '/')))
1493 return strdup(filename);
1494
1495 k = strlen(filename);
1496 if (!(r = new(char, e-path+1+k+1)))
1497 return NULL;
1498
1499 memcpy(r, path, e-path+1);
1500 memcpy(r+(e-path)+1, filename, k+1);
1501
1502 return r;
1503}
fb624d04 1504
8c6db833
LP		 1505int safe_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) {
1506 struct stat st;
1507
56cf987f 1508 if (label_mkdir(path, mode) >= 0)
8c6db833
LP		 1509 if (chmod_and_chown(path, mode, uid, gid) < 0)
1510 return -errno;
1511
1512 if (lstat(path, &st) < 0)
1513 return -errno;
1514
1515 if ((st.st_mode & 0777) != mode ||
1516 st.st_uid != uid ||
1517 st.st_gid != gid ||
1518 !S_ISDIR(st.st_mode)) {
1519 errno = EEXIST;
1520 return -errno;
1521 }
1522
1523 return 0;
1524}
1525
1526
a9f5d454
LP		 1527int mkdir_parents(const char *path, mode_t mode) {
1528 const char *p, *e;
1529
1530 assert(path);
1531
1532 /* Creates every parent directory in the path except the last
1533 * component. */
1534
1535 p = path + strspn(path, "/");
1536 for (;;) {
1537 int r;
1538 char *t;
1539
1540 e = p + strcspn(p, "/");
1541 p = e + strspn(e, "/");
1542
1543 /* Is this the last component? If so, then we're
1544 * done */
1545 if (*p == 0)
1546 return 0;
1547
1548 if (!(t = strndup(path, e - path)))
1549 return -ENOMEM;
1550
56cf987f 1551 r = label_mkdir(t, mode);
a9f5d454
LP		 1552 free(t);
1553
1554 if (r < 0 && errno != EEXIST)
1555 return -errno;
1556 }
1557}
1558
bbd67135
LP		 1559int mkdir_p(const char *path, mode_t mode) {
1560 int r;
1561
1562 /* Like mkdir -p */
1563
1564 if ((r = mkdir_parents(path, mode)) < 0)
1565 return r;
1566
56cf987f 1567 if (label_mkdir(path, mode) < 0 && errno != EEXIST)
bbd67135
LP		 1568 return -errno;
1569
1570 return 0;
1571}
1572
c32dd69b
LP		 1573int rmdir_parents(const char *path, const char *stop) {
1574 size_t l;
1575 int r = 0;
1576
1577 assert(path);
1578 assert(stop);
1579
1580 l = strlen(path);
1581
1582 /* Skip trailing slashes */
1583 while (l > 0 && path[l-1] == '/')
1584 l--;
1585
1586 while (l > 0) {
1587 char *t;
1588
1589 /* Skip last component */
1590 while (l > 0 && path[l-1] != '/')
1591 l--;
1592
1593 /* Skip trailing slashes */
1594 while (l > 0 && path[l-1] == '/')
1595 l--;
1596
1597 if (l <= 0)
1598 break;
1599
1600 if (!(t = strndup(path, l)))
1601 return -ENOMEM;
1602
1603 if (path_startswith(stop, t)) {
1604 free(t);
1605 return 0;
1606 }
1607
1608 r = rmdir(t);
1609 free(t);
1610
1611 if (r < 0)
1612 if (errno != ENOENT)
1613 return -errno;
1614 }
1615
1616 return 0;
1617}
1618
1619
fb624d04
LP		 1620char hexchar(int x) {
1621 static const char table[16] = "0123456789abcdef";
1622
1623 return table[x & 15];
1624}
4fe88d28
LP		 1625
1626int unhexchar(char c) {
1627
1628 if (c >= '0' && c <= '9')
1629 return c - '0';
1630
1631 if (c >= 'a' && c <= 'f')
ea430986 1632 return c - 'a' + 10;
4fe88d28
LP		 1633
1634 if (c >= 'A' && c <= 'F')
ea430986 1635 return c - 'A' + 10;
4fe88d28
LP		 1636
1637 return -1;
1638}
1639
1640char octchar(int x) {
1641 return '0' + (x & 7);
1642}
1643
1644int unoctchar(char c) {
1645
1646 if (c >= '0' && c <= '7')
1647 return c - '0';
1648
1649 return -1;
1650}
1651
5af98f82
LP		 1652char decchar(int x) {
1653 return '0' + (x % 10);
1654}
1655
1656int undecchar(char c) {
1657
1658 if (c >= '0' && c <= '9')
1659 return c - '0';
1660
1661 return -1;
1662}
1663
4fe88d28
LP		 1664char *cescape(const char *s) {
1665 char *r, *t;
1666 const char *f;
1667
1668 assert(s);
1669
1670 /* Does C style string escaping. */
1671
1672 if (!(r = new(char, strlen(s)*4 + 1)))
1673 return NULL;
1674
1675 for (f = s, t = r; *f; f++)
1676
1677 switch (*f) {
1678
1679 case '\a':
1680 *(t++) = '\\';
1681 *(t++) = 'a';
1682 break;
1683 case '\b':
1684 *(t++) = '\\';
1685 *(t++) = 'b';
1686 break;
1687 case '\f':
1688 *(t++) = '\\';
1689 *(t++) = 'f';
1690 break;
1691 case '\n':
1692 *(t++) = '\\';
1693 *(t++) = 'n';
1694 break;
1695 case '\r':
1696 *(t++) = '\\';
1697 *(t++) = 'r';
1698 break;
1699 case '\t':
1700 *(t++) = '\\';
1701 *(t++) = 't';
1702 break;
1703 case '\v':
1704 *(t++) = '\\';
1705 *(t++) = 'v';
1706 break;
1707 case '\\':
1708 *(t++) = '\\';
1709 *(t++) = '\\';
1710 break;
1711 case '"':
1712 *(t++) = '\\';
1713 *(t++) = '"';
1714 break;
1715 case '\'':
1716 *(t++) = '\\';
1717 *(t++) = '\'';
1718 break;
1719
1720 default:
1721 /* For special chars we prefer octal over
1722 * hexadecimal encoding, simply because glib's
1723 * g_strescape() does the same */
1724 if ((*f < ' ') || (*f >= 127)) {
1725 *(t++) = '\\';
1726 *(t++) = octchar((unsigned char) *f >> 6);
1727 *(t++) = octchar((unsigned char) *f >> 3);
1728 *(t++) = octchar((unsigned char) *f);
1729 } else
1730 *(t++) = *f;
1731 break;
1732 }
1733
1734 *t = 0;
1735
1736 return r;
1737}
1738
6febfd0d 1739char *cunescape_length(const char *s, size_t length) {
4fe88d28
LP		 1740 char *r, *t;
1741 const char *f;
1742
1743 assert(s);
1744
1745 /* Undoes C style string escaping */
1746
6febfd0d 1747 if (!(r = new(char, length+1)))
4fe88d28
LP		 1748 return r;
1749
6febfd0d 1750 for (f = s, t = r; f < s + length; f++) {
4fe88d28
LP		 1751
1752 if (*f != '\\') {
1753 *(t++) = *f;
1754 continue;
1755 }
1756
1757 f++;
1758
1759 switch (*f) {
1760
1761 case 'a':
1762 *(t++) = '\a';
1763 break;
1764 case 'b':
1765 *(t++) = '\b';
1766 break;
1767 case 'f':
1768 *(t++) = '\f';
1769 break;
1770 case 'n':
1771 *(t++) = '\n';
1772 break;
1773 case 'r':
1774 *(t++) = '\r';
1775 break;
1776 case 't':
1777 *(t++) = '\t';
1778 break;
1779 case 'v':
1780 *(t++) = '\v';
1781 break;
1782 case '\\':
1783 *(t++) = '\\';
1784 break;
1785 case '"':
1786 *(t++) = '"';
1787 break;
1788 case '\'':
1789 *(t++) = '\'';
1790 break;
1791
e167fb86
LP		 1792 case 's':
1793 /* This is an extension of the XDG syntax files */
1794 *(t++) = ' ';
1795 break;
1796
4fe88d28
LP		 1797 case 'x': {
1798 /* hexadecimal encoding */
1799 int a, b;
1800
1801 if ((a = unhexchar(f[1])) < 0 ||
1802 (b = unhexchar(f[2])) < 0) {
1803 /* Invalid escape code, let's take it literal then */
1804 *(t++) = '\\';
1805 *(t++) = 'x';
1806 } else {
1807 *(t++) = (char) ((a << 4) | b);
1808 f += 2;
1809 }
1810
1811 break;
1812 }
1813
1814 case '0':
1815 case '1':
1816 case '2':
1817 case '3':
1818 case '4':
1819 case '5':
1820 case '6':
1821 case '7': {
1822 /* octal encoding */
1823 int a, b, c;
1824
1825 if ((a = unoctchar(f[0])) < 0 ||
1826 (b = unoctchar(f[1])) < 0 ||
1827 (c = unoctchar(f[2])) < 0) {
1828 /* Invalid escape code, let's take it literal then */
1829 *(t++) = '\\';
1830 *(t++) = f[0];
1831 } else {
1832 *(t++) = (char) ((a << 6) | (b << 3) | c);
1833 f += 2;
1834 }
1835
1836 break;
1837 }
1838
1839 case 0:
1840 /* premature end of string.*/
1841 *(t++) = '\\';
1842 goto finish;
1843
1844 default:
1845 /* Invalid escape code, let's take it literal then */
1846 *(t++) = '\\';
f3d4cc01 1847 *(t++) = *f;
4fe88d28
LP		 1848 break;
1849 }
1850 }
1851
1852finish:
1853 *t = 0;
1854 return r;
1855}
1856
6febfd0d
LP		 1857char *cunescape(const char *s) {
1858 return cunescape_length(s, strlen(s));
1859}
4fe88d28
LP		 1860
1861char *xescape(const char *s, const char *bad) {
1862 char *r, *t;
1863 const char *f;
1864
1865 /* Escapes all chars in bad, in addition to \ and all special
1866 * chars, in \xFF style escaping. May be reversed with
1867 * cunescape. */
1868
1869 if (!(r = new(char, strlen(s)*4+1)))
1870 return NULL;
1871
1872 for (f = s, t = r; *f; f++) {
1873
b866264a
LP		 1874 if ((*f < ' ') || (*f >= 127) ||
1875 (*f == '\\') || strchr(bad, *f)) {
4fe88d28
LP		 1876 *(t++) = '\\';
1877 *(t++) = 'x';
1878 *(t++) = hexchar(*f >> 4);
1879 *(t++) = hexchar(*f);
1880 } else
1881 *(t++) = *f;
1882 }
1883
1884 *t = 0;
1885
1886 return r;
1887}
1888
ea430986 1889char *bus_path_escape(const char *s) {
ea430986
LP		 1890 char *r, *t;
1891 const char *f;
1892
47be870b
LP		 1893 assert(s);
1894
ea430986
LP		 1895 /* Escapes all chars that D-Bus' object path cannot deal
1896 * with. Can be reverse with bus_path_unescape() */
1897
1898 if (!(r = new(char, strlen(s)*3+1)))
1899 return NULL;
1900
1901 for (f = s, t = r; *f; f++) {
1902
1903 if (!(*f >= 'A' && *f <= 'Z') &&
1904 !(*f >= 'a' && *f <= 'z') &&
1905 !(*f >= '0' && *f <= '9')) {
1906 *(t++) = '_';
1907 *(t++) = hexchar(*f >> 4);
1908 *(t++) = hexchar(*f);
1909 } else
1910 *(t++) = *f;
1911 }
1912
1913 *t = 0;
1914
1915 return r;
1916}
1917
9e2f7c11 1918char *bus_path_unescape(const char *f) {
ea430986 1919 char *r, *t;
ea430986 1920
9e2f7c11 1921 assert(f);
47be870b 1922
9e2f7c11 1923 if (!(r = strdup(f)))
ea430986
LP		 1924 return NULL;
1925
9e2f7c11 1926 for (t = r; *f; f++) {
ea430986
LP		 1927
1928 if (*f == '_') {
1929 int a, b;
1930
1931 if ((a = unhexchar(f[1])) < 0 ||
1932 (b = unhexchar(f[2])) < 0) {
1933 /* Invalid escape code, let's take it literal then */
1934 *(t++) = '_';
1935 } else {
1936 *(t++) = (char) ((a << 4) | b);
1937 f += 2;
1938 }
1939 } else
1940 *(t++) = *f;
1941 }
1942
1943 *t = 0;
1944
1945 return r;
1946}
1947
4fe88d28
LP		 1948char *path_kill_slashes(char *path) {
1949 char *f, *t;
1950 bool slash = false;
1951
1952 /* Removes redundant inner and trailing slashes. Modifies the
1953 * passed string in-place.
1954 *
1955 * ///foo///bar/ becomes /foo/bar
1956 */
1957
1958 for (f = path, t = path; *f; f++) {
1959
1960 if (*f == '/') {
1961 slash = true;
1962 continue;
1963 }
1964
1965 if (slash) {
1966 slash = false;
1967 *(t++) = '/';
1968 }
1969
1970 *(t++) = *f;
1971 }
1972
1973 /* Special rule, if we are talking of the root directory, a
1974 trailing slash is good */
1975
1976 if (t == path && slash)
1977 *(t++) = '/';
1978
1979 *t = 0;
1980 return path;
1981}
1982
1983bool path_startswith(const char *path, const char *prefix) {
1984 assert(path);
1985 assert(prefix);
1986
1987 if ((path[0] == '/') != (prefix[0] == '/'))
1988 return false;
1989
1990 for (;;) {
1991 size_t a, b;
1992
1993 path += strspn(path, "/");
1994 prefix += strspn(prefix, "/");
1995
1996 if (*prefix == 0)
1997 return true;
1998
1999 if (*path == 0)
2000 return false;
2001
2002 a = strcspn(path, "/");
2003 b = strcspn(prefix, "/");
2004
2005 if (a != b)
2006 return false;
2007
2008 if (memcmp(path, prefix, a) != 0)
2009 return false;
2010
2011 path += a;
2012 prefix += b;
2013 }
2014}
2015
15ae422b
LP		 2016bool path_equal(const char *a, const char *b) {
2017 assert(a);
2018 assert(b);
2019
2020 if ((a[0] == '/') != (b[0] == '/'))
2021 return false;
2022
2023 for (;;) {
2024 size_t j, k;
2025
2026 a += strspn(a, "/");
2027 b += strspn(b, "/");
2028
2029 if (*a == 0 && *b == 0)
2030 return true;
2031
2032 if (*a == 0 || *b == 0)
2033 return false;
2034
2035 j = strcspn(a, "/");
2036 k = strcspn(b, "/");
2037
2038 if (j != k)
2039 return false;
2040
2041 if (memcmp(a, b, j) != 0)
2042 return false;
2043
2044 a += j;
2045 b += k;
2046 }
2047}
2048
67d51650 2049char *ascii_strlower(char *t) {
4fe88d28
LP		 2050 char *p;
2051
67d51650 2052 assert(t);
4fe88d28 2053
67d51650 2054 for (p = t; *p; p++)
4fe88d28
LP		 2055 if (*p >= 'A' && *p <= 'Z')
2056 *p = *p - 'A' + 'a';
2057
67d51650 2058 return t;
4fe88d28 2059}
1dccbe19 2060
c85dc17b
LP		 2061bool ignore_file(const char *filename) {
2062 assert(filename);
2063
2064 return
2065 filename[0] == '.' ||
6c78be3c 2066 streq(filename, "lost+found") ||
e472d476
LP		 2067 streq(filename, "aquota.user") ||
2068 streq(filename, "aquota.group") ||
c85dc17b
LP		 2069 endswith(filename, "~") ||
2070 endswith(filename, ".rpmnew") ||
2071 endswith(filename, ".rpmsave") ||
2072 endswith(filename, ".rpmorig") ||
2073 endswith(filename, ".dpkg-old") ||
2074 endswith(filename, ".dpkg-new") ||
2075 endswith(filename, ".swp");
2076}
2077
3a0ecb08
LP		 2078int fd_nonblock(int fd, bool nonblock) {
2079 int flags;
2080
2081 assert(fd >= 0);
2082
2083 if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
2084 return -errno;
2085
2086 if (nonblock)
2087 flags |= O_NONBLOCK;
2088 else
2089 flags &= ~O_NONBLOCK;
2090
2091 if (fcntl(fd, F_SETFL, flags) < 0)
2092 return -errno;
2093
2094 return 0;
2095}
2096
2097int fd_cloexec(int fd, bool cloexec) {
2098 int flags;
2099
2100 assert(fd >= 0);
2101
2102 if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
2103 return -errno;
2104
2105 if (cloexec)
2106 flags |= FD_CLOEXEC;
2107 else
2108 flags &= ~FD_CLOEXEC;
2109
2110 if (fcntl(fd, F_SETFD, flags) < 0)
2111 return -errno;
2112
2113 return 0;
2114}
2115
a0d40ac5
LP		 2116int close_all_fds(const int except[], unsigned n_except) {
2117 DIR *d;
2118 struct dirent *de;
2119 int r = 0;
2120
2121 if (!(d = opendir("/proc/self/fd")))
2122 return -errno;
2123
2124 while ((de = readdir(d))) {
a7610064 2125 int fd = -1;
a0d40ac5 2126
a16e1123 2127 if (ignore_file(de->d_name))
a0d40ac5
LP		 2128 continue;
2129
720ce21d
LP		 2130 if (safe_atoi(de->d_name, &fd) < 0)
2131 /* Let's better ignore this, just in case */
2132 continue;
a0d40ac5
LP		 2133
2134 if (fd < 3)
2135 continue;
2136
2137 if (fd == dirfd(d))
2138 continue;
2139
2140 if (except) {
2141 bool found;
2142 unsigned i;
2143
2144 found = false;
2145 for (i = 0; i < n_except; i++)
2146 if (except[i] == fd) {
2147 found = true;
2148 break;
2149 }
2150
2151 if (found)
2152 continue;
2153 }
2154
720ce21d 2155 if (close_nointr(fd) < 0) {
2f357920 2156 /* Valgrind has its own FD and doesn't want to have it closed */
720ce21d
LP		 2157 if (errno != EBADF && r == 0)
2158 r = -errno;
2f357920 2159 }
a0d40ac5
LP		 2160 }
2161
a0d40ac5
LP		 2162 closedir(d);
2163 return r;
2164}
2165
db12775d
LP		 2166bool chars_intersect(const char *a, const char *b) {
2167 const char *p;
2168
2169 /* Returns true if any of the chars in a are in b. */
2170 for (p = a; *p; p++)
2171 if (strchr(b, *p))
2172 return true;
2173
2174 return false;
2175}
2176
8b6c7120
LP		 2177char *format_timestamp(char *buf, size_t l, usec_t t) {
2178 struct tm tm;
2179 time_t sec;
2180
2181 assert(buf);
2182 assert(l > 0);
2183
2184 if (t <= 0)
2185 return NULL;
2186
f872ec33 2187 sec = (time_t) (t / USEC_PER_SEC);
8b6c7120
LP		 2188
2189 if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
2190 return NULL;
2191
2192 return buf;
2193}
2194
584be568
LP		 2195char *format_timestamp_pretty(char *buf, size_t l, usec_t t) {
2196 usec_t n, d;
2197
2198 n = now(CLOCK_REALTIME);
2199
2200 if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t)
2201 return NULL;
2202
2203 d = n - t;
2204
2205 if (d >= USEC_PER_YEAR)
2206 snprintf(buf, l, "%llu years and %llu months ago",
2207 (unsigned long long) (d / USEC_PER_YEAR),
2208 (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH));
2209 else if (d >= USEC_PER_MONTH)
2210 snprintf(buf, l, "%llu months and %llu days ago",
2211 (unsigned long long) (d / USEC_PER_MONTH),
2212 (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY));
2213 else if (d >= USEC_PER_WEEK)
2214 snprintf(buf, l, "%llu weeks and %llu days ago",
2215 (unsigned long long) (d / USEC_PER_WEEK),
2216 (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY));
2217 else if (d >= 2*USEC_PER_DAY)
2218 snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY));
2219 else if (d >= 25*USEC_PER_HOUR)
2220 snprintf(buf, l, "1 day and %lluh ago",
2221 (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR));
2222 else if (d >= 6*USEC_PER_HOUR)
2223 snprintf(buf, l, "%lluh ago",
2224 (unsigned long long) (d / USEC_PER_HOUR));
2225 else if (d >= USEC_PER_HOUR)
2226 snprintf(buf, l, "%lluh %llumin ago",
2227 (unsigned long long) (d / USEC_PER_HOUR),
2228 (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE));
2229 else if (d >= 5*USEC_PER_MINUTE)
2230 snprintf(buf, l, "%llumin ago",
2231 (unsigned long long) (d / USEC_PER_MINUTE));
2232 else if (d >= USEC_PER_MINUTE)
2233 snprintf(buf, l, "%llumin %llus ago",
2234 (unsigned long long) (d / USEC_PER_MINUTE),
2235 (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC));
2236 else if (d >= USEC_PER_SEC)
2237 snprintf(buf, l, "%llus ago",
2238 (unsigned long long) (d / USEC_PER_SEC));
2239 else if (d >= USEC_PER_MSEC)
2240 snprintf(buf, l, "%llums ago",
2241 (unsigned long long) (d / USEC_PER_MSEC));
2242 else if (d > 0)
2243 snprintf(buf, l, "%lluus ago",
2244 (unsigned long long) d);
2245 else
2246 snprintf(buf, l, "now");
2247
2248 buf[l-1] = 0;
2249 return buf;
2250}
2251
871d7de4
LP		 2252char *format_timespan(char *buf, size_t l, usec_t t) {
2253 static const struct {
2254 const char *suffix;
2255 usec_t usec;
2256 } table[] = {
2257 { "w", USEC_PER_WEEK },
2258 { "d", USEC_PER_DAY },
2259 { "h", USEC_PER_HOUR },
2260 { "min", USEC_PER_MINUTE },
2261 { "s", USEC_PER_SEC },
2262 { "ms", USEC_PER_MSEC },
2263 { "us", 1 },
2264 };
2265
2266 unsigned i;
2267 char *p = buf;
2268
2269 assert(buf);
2270 assert(l > 0);
2271
2272 if (t == (usec_t) -1)
2273 return NULL;
2274
4502d22c
LP		 2275 if (t == 0) {
2276 snprintf(p, l, "0");
2277 p[l-1] = 0;
2278 return p;
2279 }
2280
871d7de4
LP		 2281 /* The result of this function can be parsed with parse_usec */
2282
2283 for (i = 0; i < ELEMENTSOF(table); i++) {
2284 int k;
2285 size_t n;
2286
2287 if (t < table[i].usec)
2288 continue;
2289
2290 if (l <= 1)
2291 break;
2292
2293 k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix);
2294 n = MIN((size_t) k, l);
2295
2296 l -= n;
2297 p += n;
2298
2299 t %= table[i].usec;
2300 }
2301
2302 *p = 0;
2303
2304 return buf;
2305}
2306
42856c10
LP		 2307bool fstype_is_network(const char *fstype) {
2308 static const char * const table[] = {
2309 "cifs",
2310 "smbfs",
2311 "ncpfs",
2312 "nfs",
ca139f94
LP		 2313 "nfs4",
2314 "gfs",
2315 "gfs2"
42856c10
LP		 2316 };
2317
2318 unsigned i;
2319
2320 for (i = 0; i < ELEMENTSOF(table); i++)
2321 if (streq(table[i], fstype))
2322 return true;
2323
2324 return false;
2325}
2326
601f6a1e
LP		 2327int chvt(int vt) {
2328 int fd, r = 0;
2329
74bc3bdc 2330 if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
601f6a1e
LP		 2331 return -errno;
2332
2333 if (vt < 0) {
2334 int tiocl[2] = {
2335 TIOCL_GETKMSGREDIRECT,
2336 0
2337 };
2338
678abaf9
TJ		 2339 if (ioctl(fd, TIOCLINUX, tiocl) < 0) {
2340 r = -errno;
2341 goto fail;
2342 }
601f6a1e
LP		 2343
2344 vt = tiocl[0] <= 0 ? 1 : tiocl[0];
2345 }
2346
2347 if (ioctl(fd, VT_ACTIVATE, vt) < 0)
2348 r = -errno;
2349
678abaf9
TJ		 2350fail:
2351 close_nointr_nofail(fd);
601f6a1e
LP		 2352 return r;
2353}
2354
80876c20
LP		 2355int read_one_char(FILE *f, char *ret, bool *need_nl) {
2356 struct termios old_termios, new_termios;
2357 char c;
20c03b7b 2358 char line[LINE_MAX];
80876c20
LP		 2359
2360 assert(f);
2361 assert(ret);
2362
2363 if (tcgetattr(fileno(f), &old_termios) >= 0) {
2364 new_termios = old_termios;
2365
2366 new_termios.c_lflag &= ~ICANON;
2367 new_termios.c_cc[VMIN] = 1;
2368 new_termios.c_cc[VTIME] = 0;
2369
2370 if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
2371 size_t k;
2372
2373 k = fread(&c, 1, 1, f);
2374
2375 tcsetattr(fileno(f), TCSADRAIN, &old_termios);
2376
2377 if (k <= 0)
2378 return -EIO;
2379
2380 if (need_nl)
2381 *need_nl = c != '\n';
2382
2383 *ret = c;
2384 return 0;
2385 }
2386 }
2387
2388 if (!(fgets(line, sizeof(line), f)))
2389 return -EIO;
2390
2391 truncate_nl(line);
2392
2393 if (strlen(line) != 1)
2394 return -EBADMSG;
2395
2396 if (need_nl)
2397 *need_nl = false;
2398
2399 *ret = line[0];
2400 return 0;
2401}
2402
2403int ask(char *ret, const char *replies, const char *text, ...) {
1b39d4b9
LP		 2404 bool on_tty;
2405
80876c20
LP		 2406 assert(ret);
2407 assert(replies);
2408 assert(text);
2409
1b39d4b9
LP		 2410 on_tty = isatty(STDOUT_FILENO);
2411
80876c20
LP		 2412 for (;;) {
2413 va_list ap;
2414 char c;
2415 int r;
2416 bool need_nl = true;
2417
1b39d4b9
LP		 2418 if (on_tty)
2419 fputs("\x1B[1m", stdout);
b1b2dc0c 2420
80876c20
LP		 2421 va_start(ap, text);
2422 vprintf(text, ap);
2423 va_end(ap);
2424
1b39d4b9
LP		 2425 if (on_tty)
2426 fputs("\x1B[0m", stdout);
b1b2dc0c 2427
80876c20
LP		 2428 fflush(stdout);
2429
2430 if ((r = read_one_char(stdin, &c, &need_nl)) < 0) {
2431
2432 if (r == -EBADMSG) {
2433 puts("Bad input, please try again.");
2434 continue;
2435 }
2436
2437 putchar('\n');
2438 return r;
2439 }
2440
2441 if (need_nl)
2442 putchar('\n');
2443
2444 if (strchr(replies, c)) {
2445 *ret = c;
2446 return 0;
2447 }
2448
2449 puts("Read unexpected character, please try again.");
2450 }
2451}
2452
6ea832a2 2453int reset_terminal_fd(int fd) {
80876c20
LP		 2454 struct termios termios;
2455 int r = 0;
3fe5e5d4
LP		 2456
2457 /* Set terminal to some sane defaults */
80876c20
LP		 2458
2459 assert(fd >= 0);
2460
eed1d0e3
LP		 2461 /* We leave locked terminal attributes untouched, so that
2462 * Plymouth may set whatever it wants to set, and we don't
2463 * interfere with that. */
3fe5e5d4
LP		 2464
2465 /* Disable exclusive mode, just in case */
2466 ioctl(fd, TIOCNXCL);
2467
2468 /* Enable console unicode mode */
df465b3f 2469 ioctl(fd, KDSKBMODE, K_UNICODE);
80876c20
LP		 2470
2471 if (tcgetattr(fd, &termios) < 0) {
2472 r = -errno;
2473 goto finish;
2474 }
2475
aaf694ca
LP		 2476 /* We only reset the stuff that matters to the software. How
2477 * hardware is set up we don't touch assuming that somebody
2478 * else will do that for us */
2479
2480 termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
80876c20
LP		 2481 termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
2482 termios.c_oflag |= ONLCR;
2483 termios.c_cflag |= CREAD;
2484 termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
2485
2486 termios.c_cc[VINTR] = 03; /* ^C */
2487 termios.c_cc[VQUIT] = 034; /* ^\ */
2488 termios.c_cc[VERASE] = 0177;
2489 termios.c_cc[VKILL] = 025; /* ^X */
2490 termios.c_cc[VEOF] = 04; /* ^D */
2491 termios.c_cc[VSTART] = 021; /* ^Q */
2492 termios.c_cc[VSTOP] = 023; /* ^S */
2493 termios.c_cc[VSUSP] = 032; /* ^Z */
2494 termios.c_cc[VLNEXT] = 026; /* ^V */
2495 termios.c_cc[VWERASE] = 027; /* ^W */
2496 termios.c_cc[VREPRINT] = 022; /* ^R */
aaf694ca
LP		 2497 termios.c_cc[VEOL] = 0;
2498 termios.c_cc[VEOL2] = 0;
80876c20
LP		 2499
2500 termios.c_cc[VTIME] = 0;
2501 termios.c_cc[VMIN] = 1;
2502
2503 if (tcsetattr(fd, TCSANOW, &termios) < 0)
2504 r = -errno;
2505
2506finish:
2507 /* Just in case, flush all crap out */
2508 tcflush(fd, TCIOFLUSH);
2509
2510 return r;
2511}
2512
6ea832a2
LP		 2513int reset_terminal(const char *name) {
2514 int fd, r;
2515
2516 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
2517 if (fd < 0)
2518 return fd;
2519
2520 r = reset_terminal_fd(fd);
2521 close_nointr_nofail(fd);
2522
2523 return r;
2524}
2525
80876c20
LP		 2526int open_terminal(const char *name, int mode) {
2527 int fd, r;
f73f76ac 2528 unsigned c = 0;
80876c20 2529
f73f76ac
LP		 2530 /*
2531 * If a TTY is in the process of being closed opening it might
2532 * cause EIO. This is horribly awful, but unlikely to be
2533 * changed in the kernel. Hence we work around this problem by
2534 * retrying a couple of times.
2535 *
2536 * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245
2537 */
2538
2539 for (;;) {
2540 if ((fd = open(name, mode)) >= 0)
2541 break;
2542
2543 if (errno != EIO)
2544 return -errno;
2545
2546 if (c >= 20)
2547 return -errno;
2548
2549 usleep(50 * USEC_PER_MSEC);
2550 c++;
2551 }
2552
2553 if (fd < 0)
80876c20
LP		 2554 return -errno;
2555
2556 if ((r = isatty(fd)) < 0) {
2557 close_nointr_nofail(fd);
2558 return -errno;
2559 }
2560
2561 if (!r) {
2562 close_nointr_nofail(fd);
2563 return -ENOTTY;
2564 }
2565
2566 return fd;
2567}
2568
2569int flush_fd(int fd) {
2570 struct pollfd pollfd;
2571
2572 zero(pollfd);
2573 pollfd.fd = fd;
2574 pollfd.events = POLLIN;
2575
2576 for (;;) {
20c03b7b 2577 char buf[LINE_MAX];
80876c20
LP		 2578 ssize_t l;
2579 int r;
2580
2581 if ((r = poll(&pollfd, 1, 0)) < 0) {
2582
2583 if (errno == EINTR)
2584 continue;
2585
2586 return -errno;
2587 }
2588
2589 if (r == 0)
2590 return 0;
2591
2592 if ((l = read(fd, buf, sizeof(buf))) < 0) {
2593
2594 if (errno == EINTR)
2595 continue;
2596
2597 if (errno == EAGAIN)
2598 return 0;
2599
2600 return -errno;
2601 }
2602
2603 if (l <= 0)
2604 return 0;
2605 }
2606}
2607
21de3988 2608int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm) {
bab45044 2609 int fd = -1, notify = -1, r, wd = -1;
80876c20
LP		 2610
2611 assert(name);
2612
2613 /* We use inotify to be notified when the tty is closed. We
2614 * create the watch before checking if we can actually acquire
2615 * it, so that we don't lose any event.
2616 *
2617 * Note: strictly speaking this actually watches for the
2618 * device being closed, it does *not* really watch whether a
2619 * tty loses its controlling process. However, unless some
2620 * rogue process uses TIOCNOTTY on /dev/tty *after* closing
2621 * its tty otherwise this will not become a problem. As long
2622 * as the administrator makes sure not configure any service
2623 * on the same tty as an untrusted user this should not be a
2624 * problem. (Which he probably should not do anyway.) */
2625
2626 if (!fail && !force) {
2627 if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
2628 r = -errno;
2629 goto fail;
2630 }
2631
2632 if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) {
2633 r = -errno;
2634 goto fail;
2635 }
2636 }
2637
2638 for (;;) {
e3d1855b
LP		 2639 if (notify >= 0)
2640 if ((r = flush_fd(notify)) < 0)
2641 goto fail;
80876c20
LP		 2642
2643 /* We pass here O_NOCTTY only so that we can check the return
2644 * value TIOCSCTTY and have a reliable way to figure out if we
2645 * successfully became the controlling process of the tty */
6ea832a2
LP		 2646 if ((fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
2647 return fd;
80876c20
LP		 2648
2649 /* First, try to get the tty */
21de3988
LP		 2650 r = ioctl(fd, TIOCSCTTY, force);
2651
2652 /* Sometimes it makes sense to ignore TIOCSCTTY
2653 * returning EPERM, i.e. when very likely we already
2654 * are have this controlling terminal. */
2655 if (r < 0 && errno == EPERM && ignore_tiocstty_eperm)
2656 r = 0;
2657
2658 if (r < 0 && (force || fail || errno != EPERM)) {
80876c20
LP		 2659 r = -errno;
2660 goto fail;
2661 }
2662
2663 if (r >= 0)
2664 break;
2665
2666 assert(!fail);
2667 assert(!force);
2668 assert(notify >= 0);
2669
2670 for (;;) {
f601daa7 2671 uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX];
80876c20 2672 ssize_t l;
f601daa7 2673 struct inotify_event *e;
80876c20 2674
50f20cfd 2675 if ((l = read(notify, inotify_buffer, sizeof(inotify_buffer))) < 0) {
80876c20 2676
f601daa7
LP		 2677 if (errno == EINTR)
2678 continue;
2679
2680 r = -errno;
2681 goto fail;
2682 }
2683
2684 e = (struct inotify_event*) inotify_buffer;
80876c20 2685
f601daa7
LP		 2686 while (l > 0) {
2687 size_t step;
80876c20 2688
f601daa7 2689 if (e->wd != wd || !(e->mask & IN_CLOSE)) {
80876c20 2690 r = -EIO;
f601daa7
LP		 2691 goto fail;
2692 }
80876c20 2693
f601daa7
LP		 2694 step = sizeof(struct inotify_event) + e->len;
2695 assert(step <= (size_t) l);
80876c20 2696
f601daa7
LP		 2697 e = (struct inotify_event*) ((uint8_t*) e + step);
2698 l -= step;
80876c20
LP		 2699 }
2700
2701 break;
2702 }
2703
2704 /* We close the tty fd here since if the old session
2705 * ended our handle will be dead. It's important that
2706 * we do this after sleeping, so that we don't enter
2707 * an endless loop. */
2708 close_nointr_nofail(fd);
2709 }
2710
2711 if (notify >= 0)
a16e1123 2712 close_nointr_nofail(notify);
80876c20 2713
6ea832a2 2714 if ((r = reset_terminal_fd(fd)) < 0)
80876c20
LP		 2715 log_warning("Failed to reset terminal: %s", strerror(-r));
2716
2717 return fd;
2718
2719fail:
2720 if (fd >= 0)
a16e1123 2721 close_nointr_nofail(fd);
80876c20
LP		 2722
2723 if (notify >= 0)
a16e1123 2724 close_nointr_nofail(notify);
80876c20
LP		 2725
2726 return r;
2727}
2728
2729int release_terminal(void) {
2730 int r = 0, fd;
57cd2192 2731 struct sigaction sa_old, sa_new;
80876c20 2732
ccaa6149 2733 if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0)
80876c20
LP		 2734 return -errno;
2735
57cd2192
LP		 2736 /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
2737 * by our own TIOCNOTTY */
2738
2739 zero(sa_new);
2740 sa_new.sa_handler = SIG_IGN;
2741 sa_new.sa_flags = SA_RESTART;
2742 assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
2743
80876c20
LP		 2744 if (ioctl(fd, TIOCNOTTY) < 0)
2745 r = -errno;
2746
57cd2192
LP		 2747 assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
2748
80876c20
LP		 2749 close_nointr_nofail(fd);
2750 return r;
2751}
2752
9a34ec5f
LP		 2753int sigaction_many(const struct sigaction *sa, ...) {
2754 va_list ap;
2755 int r = 0, sig;
2756
2757 va_start(ap, sa);
2758 while ((sig = va_arg(ap, int)) > 0)
2759 if (sigaction(sig, sa, NULL) < 0)
2760 r = -errno;
2761 va_end(ap);
2762
2763 return r;
2764}
2765
2766int ignore_signals(int sig, ...) {
a337c6fc 2767 struct sigaction sa;
9a34ec5f
LP		 2768 va_list ap;
2769 int r = 0;
a337c6fc
LP		 2770
2771 zero(sa);
2772 sa.sa_handler = SIG_IGN;
2773 sa.sa_flags = SA_RESTART;
2774
9a34ec5f
LP		 2775 if (sigaction(sig, &sa, NULL) < 0)
2776 r = -errno;
2777
2778 va_start(ap, sig);
2779 while ((sig = va_arg(ap, int)) > 0)
2780 if (sigaction(sig, &sa, NULL) < 0)
2781 r = -errno;
2782 va_end(ap);
2783
2784 return r;
2785}
2786
2787int default_signals(int sig, ...) {
2788 struct sigaction sa;
2789 va_list ap;
2790 int r = 0;
2791
2792 zero(sa);
2793 sa.sa_handler = SIG_DFL;
2794 sa.sa_flags = SA_RESTART;
2795
2796 if (sigaction(sig, &sa, NULL) < 0)
2797 r = -errno;
2798
2799 va_start(ap, sig);
2800 while ((sig = va_arg(ap, int)) > 0)
2801 if (sigaction(sig, &sa, NULL) < 0)
2802 r = -errno;
2803 va_end(ap);
2804
2805 return r;
a337c6fc
LP		 2806}
2807
8d567588
LP		 2808int close_pipe(int p[]) {
2809 int a = 0, b = 0;
2810
2811 assert(p);
2812
2813 if (p[0] >= 0) {
2814 a = close_nointr(p[0]);
2815 p[0] = -1;
2816 }
2817
2818 if (p[1] >= 0) {
2819 b = close_nointr(p[1]);
2820 p[1] = -1;
2821 }
2822
2823 return a < 0 ? a : b;
2824}
2825
eb22ac37 2826ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
8d567588
LP		 2827 uint8_t *p;
2828 ssize_t n = 0;
2829
2830 assert(fd >= 0);
2831 assert(buf);
2832
2833 p = buf;
2834
2835 while (nbytes > 0) {
2836 ssize_t k;
2837
2838 if ((k = read(fd, p, nbytes)) <= 0) {
2839
eb22ac37 2840 if (k < 0 && errno == EINTR)
8d567588
LP		 2841 continue;
2842
eb22ac37 2843 if (k < 0 && errno == EAGAIN && do_poll) {
8d567588
LP		 2844 struct pollfd pollfd;
2845
2846 zero(pollfd);
2847 pollfd.fd = fd;
2848 pollfd.events = POLLIN;
2849
2850 if (poll(&pollfd, 1, -1) < 0) {
2851 if (errno == EINTR)
2852 continue;
2853
2854 return n > 0 ? n : -errno;
2855 }
2856
2857 if (pollfd.revents != POLLIN)
2858 return n > 0 ? n : -EIO;
2859
2860 continue;
2861 }
2862
2863 return n > 0 ? n : (k < 0 ? -errno : 0);
2864 }
2865
2866 p += k;
2867 nbytes -= k;
2868 n += k;
2869 }
2870
2871 return n;
2872}
2873
eb22ac37
LP		 2874ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
2875 const uint8_t *p;
2876 ssize_t n = 0;
2877
2878 assert(fd >= 0);
2879 assert(buf);
2880
2881 p = buf;
2882
2883 while (nbytes > 0) {
2884 ssize_t k;
2885
fe652127
LP		 2886 k = write(fd, p, nbytes);
2887 if (k <= 0) {
eb22ac37
LP		 2888
2889 if (k < 0 && errno == EINTR)
2890 continue;
2891
2892 if (k < 0 && errno == EAGAIN && do_poll) {
2893 struct pollfd pollfd;
2894
2895 zero(pollfd);
2896 pollfd.fd = fd;
2897 pollfd.events = POLLOUT;
2898
2899 if (poll(&pollfd, 1, -1) < 0) {
2900 if (errno == EINTR)
2901 continue;
2902
2903 return n > 0 ? n : -errno;
2904 }
2905
2906 if (pollfd.revents != POLLOUT)
2907 return n > 0 ? n : -EIO;
2908
2909 continue;
2910 }
2911
2912 return n > 0 ? n : (k < 0 ? -errno : 0);
2913 }
2914
2915 p += k;
2916 nbytes -= k;
2917 n += k;
2918 }
2919
2920 return n;
2921}
2922
0c85a4f3 2923int path_is_mount_point(const char *t, bool allow_symlink) {
8d567588 2924 struct stat a, b;
35d2e7ec
LP		 2925 char *parent;
2926 int r;
8d567588 2927
0c85a4f3
LP		 2928 if (allow_symlink)
2929 r = stat(t, &a);
2930 else
2931 r = lstat(t, &a);
2932
2933 if (r < 0) {
8d567588
LP		 2934 if (errno == ENOENT)
2935 return 0;
2936
2937 return -errno;
2938 }
2939
0c85a4f3
LP		 2940 r = parent_of_path(t, &parent);
2941 if (r < 0)
35d2e7ec 2942 return r;
8d567588 2943
35d2e7ec
LP		 2944 r = lstat(parent, &b);
2945 free(parent);
8d567588 2946
35d2e7ec
LP		 2947 if (r < 0)
2948 return -errno;
8d567588
LP		 2949
2950 return a.st_dev != b.st_dev;
2951}
2952
24a6e4a4
LP		 2953int parse_usec(const char *t, usec_t *usec) {
2954 static const struct {
2955 const char *suffix;
2956 usec_t usec;
2957 } table[] = {
2958 { "sec", USEC_PER_SEC },
2959 { "s", USEC_PER_SEC },
2960 { "min", USEC_PER_MINUTE },
2961 { "hr", USEC_PER_HOUR },
2962 { "h", USEC_PER_HOUR },
2963 { "d", USEC_PER_DAY },
2964 { "w", USEC_PER_WEEK },
2965 { "msec", USEC_PER_MSEC },
2966 { "ms", USEC_PER_MSEC },
2967 { "m", USEC_PER_MINUTE },
2968 { "usec", 1ULL },
2969 { "us", 1ULL },
2970 { "", USEC_PER_SEC },
2971 };
2972
2973 const char *p;
2974 usec_t r = 0;
2975
2976 assert(t);
2977 assert(usec);
2978
2979 p = t;
2980 do {
2981 long long l;
2982 char *e;
2983 unsigned i;
2984
2985 errno = 0;
2986 l = strtoll(p, &e, 10);
2987
2988 if (errno != 0)
2989 return -errno;
2990
2991 if (l < 0)
2992 return -ERANGE;
2993
2994 if (e == p)
2995 return -EINVAL;
2996
2997 e += strspn(e, WHITESPACE);
2998
2999 for (i = 0; i < ELEMENTSOF(table); i++)
3000 if (startswith(e, table[i].suffix)) {
3001 r += (usec_t) l * table[i].usec;
3002 p = e + strlen(table[i].suffix);
3003 break;
3004 }
3005
3006 if (i >= ELEMENTSOF(table))
3007 return -EINVAL;
3008
3009 } while (*p != 0);
3010
3011 *usec = r;
3012
3013 return 0;
3014}
3015
ab1f0633
LP		 3016int parse_bytes(const char *t, off_t *bytes) {
3017 static const struct {
3018 const char *suffix;
3019 off_t factor;
3020 } table[] = {
3021 { "B", 1 },
3022 { "K", 1024ULL },
3023 { "M", 1024ULL*1024ULL },
3024 { "G", 1024ULL*1024ULL*1024ULL },
3025 { "T", 1024ULL*1024ULL*1024ULL*1024ULL },
3026 { "", 1 },
3027 };
3028
3029 const char *p;
3030 off_t r = 0;
3031
3032 assert(t);
3033 assert(bytes);
3034
3035 p = t;
3036 do {
3037 long long l;
3038 char *e;
3039 unsigned i;
3040
3041 errno = 0;
3042 l = strtoll(p, &e, 10);
3043
3044 if (errno != 0)
3045 return -errno;
3046
3047 if (l < 0)
3048 return -ERANGE;
3049
3050 if (e == p)
3051 return -EINVAL;
3052
3053 e += strspn(e, WHITESPACE);
3054
3055 for (i = 0; i < ELEMENTSOF(table); i++)
3056 if (startswith(e, table[i].suffix)) {
3057 r += (off_t) l * table[i].factor;
3058 p = e + strlen(table[i].suffix);
3059 break;
3060 }
3061
3062 if (i >= ELEMENTSOF(table))
3063 return -EINVAL;
3064
3065 } while (*p != 0);
3066
3067 *bytes = r;
3068
3069 return 0;
3070}
3071
843d2643
LP		 3072int make_stdio(int fd) {
3073 int r, s, t;
3074
3075 assert(fd >= 0);
3076
3077 r = dup2(fd, STDIN_FILENO);
3078 s = dup2(fd, STDOUT_FILENO);
3079 t = dup2(fd, STDERR_FILENO);
3080
3081 if (fd >= 3)
3082 close_nointr_nofail(fd);
3083
3084 if (r < 0 || s < 0 || t < 0)
3085 return -errno;
3086
7862f62d
LP		 3087 fd_cloexec(STDIN_FILENO, false);
3088 fd_cloexec(STDOUT_FILENO, false);
3089 fd_cloexec(STDERR_FILENO, false);
3090
843d2643
LP		 3091 return 0;
3092}
3093
ade509ce
LP		 3094int make_null_stdio(void) {
3095 int null_fd;
3096
3097 if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0)
3098 return -errno;
3099
3100 return make_stdio(null_fd);
3101}
3102
8407a5d0
LP		 3103bool is_device_path(const char *path) {
3104
3105 /* Returns true on paths that refer to a device, either in
3106 * sysfs or in /dev */
3107
3108 return
3109 path_startswith(path, "/dev/") ||
3110 path_startswith(path, "/sys/");
3111}
3112
01f78473
LP		 3113int dir_is_empty(const char *path) {
3114 DIR *d;
3115 int r;
3116 struct dirent buf, *de;
3117
3118 if (!(d = opendir(path)))
3119 return -errno;
3120
3121 for (;;) {
3122 if ((r = readdir_r(d, &buf, &de)) > 0) {
3123 r = -r;
3124 break;
3125 }
3126
3127 if (!de) {
3128 r = 1;
3129 break;
3130 }
3131
3132 if (!ignore_file(de->d_name)) {
3133 r = 0;
3134 break;
3135 }
3136 }
3137
3138 closedir(d);
3139 return r;
3140}
3141
d3782d60
LP		 3142unsigned long long random_ull(void) {
3143 int fd;
3144 uint64_t ull;
3145 ssize_t r;
3146
3147 if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0)
3148 goto fallback;
3149
eb22ac37 3150 r = loop_read(fd, &ull, sizeof(ull), true);
d3782d60
LP		 3151 close_nointr_nofail(fd);
3152
3153 if (r != sizeof(ull))
3154 goto fallback;
3155
3156 return ull;
3157
3158fallback:
3159 return random() * RAND_MAX + random();
3160}
3161
5b6319dc
LP		 3162void rename_process(const char name[8]) {
3163 assert(name);
3164
3165 prctl(PR_SET_NAME, name);
3166
3167 /* This is a like a poor man's setproctitle(). The string
3168 * passed should fit in 7 chars (i.e. the length of
3169 * "systemd") */
3170
3171 if (program_invocation_name)
3172 strncpy(program_invocation_name, name, strlen(program_invocation_name));
9a0e6896
LP		 3173
3174 if (saved_argc > 0) {
3175 int i;
3176
3177 if (saved_argv[0])
3178 strncpy(saved_argv[0], name, strlen(saved_argv[0]));
3179
3180 for (i = 1; i < saved_argc; i++) {
3181 if (!saved_argv[i])
3182 break;
3183
3184 memset(saved_argv[i], 0, strlen(saved_argv[i]));
3185 }
3186 }
5b6319dc
LP		 3187}
3188
7d793605
LP		 3189void sigset_add_many(sigset_t *ss, ...) {
3190 va_list ap;
3191 int sig;
3192
3193 assert(ss);
3194
3195 va_start(ap, ss);
3196 while ((sig = va_arg(ap, int)) > 0)
3197 assert_se(sigaddset(ss, sig) == 0);
3198 va_end(ap);
3199}
3200
ef2f1067
LP		 3201char* gethostname_malloc(void) {
3202 struct utsname u;
3203
3204 assert_se(uname(&u) >= 0);
3205
3206 if (u.nodename[0])
3207 return strdup(u.nodename);
3208
3209 return strdup(u.sysname);
3210}
3211
3212char* getlogname_malloc(void) {
3213 uid_t uid;
3214 long bufsize;
3215 char *buf, *name;
3216 struct passwd pwbuf, *pw = NULL;
3217 struct stat st;
3218
3219 if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
3220 uid = st.st_uid;
3221 else
3222 uid = getuid();
3223
3224 /* Shortcut things to avoid NSS lookups */
3225 if (uid == 0)
3226 return strdup("root");
3227
3228 if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0)
3229 bufsize = 4096;
3230
3231 if (!(buf = malloc(bufsize)))
3232 return NULL;
3233
3234 if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) {
3235 name = strdup(pw->pw_name);
3236 free(buf);
3237 return name;
3238 }
3239
3240 free(buf);
3241
3242 if (asprintf(&name, "%lu", (unsigned long) uid) < 0)
3243 return NULL;
3244
3245 return name;
3246}
3247
fc116c6a
LP		 3248int getttyname_malloc(int fd, char **r) {
3249 char path[PATH_MAX], *c;
618e02c7 3250 int k;
8c6db833
LP		 3251
3252 assert(r);
ef2f1067 3253
fc116c6a 3254 if ((k = ttyname_r(fd, path, sizeof(path))) != 0)
618e02c7 3255 return -k;
ef2f1067
LP		 3256
3257 char_array_0(path);
3258
fc116c6a 3259 if (!(c = strdup(startswith(path, "/dev/") ? path + 5 : path)))
8c6db833
LP		 3260 return -ENOMEM;
3261
3262 *r = c;
3263 return 0;
3264}
3265
fc116c6a
LP		 3266int getttyname_harder(int fd, char **r) {
3267 int k;
3268 char *s;
3269
3270 if ((k = getttyname_malloc(fd, &s)) < 0)
3271 return k;
3272
3273 if (streq(s, "tty")) {
3274 free(s);
4d6d6518 3275 return get_ctty(0, NULL, r);
fc116c6a
LP		 3276 }
3277
3278 *r = s;
3279 return 0;
3280}
3281
4d6d6518 3282int get_ctty_devnr(pid_t pid, dev_t *d) {
fc116c6a 3283 int k;
4d6d6518 3284 char line[LINE_MAX], *p, *fn;
fc116c6a
LP		 3285 unsigned long ttynr;
3286 FILE *f;
3287
4d6d6518
LP		 3288 if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0)
3289 return -ENOMEM;
3290
3291 f = fopen(fn, "re");
3292 free(fn);
3293 if (!f)
fc116c6a
LP		 3294 return -errno;
3295
4d6d6518 3296 if (!fgets(line, sizeof(line), f)) {
35d50f55 3297 k = feof(f) ? -EIO : -errno;
fc116c6a
LP		 3298 fclose(f);
3299 return k;
3300 }
3301
3302 fclose(f);
3303
4d6d6518
LP		 3304 p = strrchr(line, ')');
3305 if (!p)
fc116c6a
LP		 3306 return -EIO;
3307
3308 p++;
3309
3310 if (sscanf(p, " "
3311 "%*c " /* state */
3312 "%*d " /* ppid */
3313 "%*d " /* pgrp */
3314 "%*d " /* session */
3315 "%lu ", /* ttynr */
3316 &ttynr) != 1)
3317 return -EIO;
3318
3319 *d = (dev_t) ttynr;
3320 return 0;
3321}
3322
4d6d6518 3323int get_ctty(pid_t pid, dev_t *_devnr, char **r) {
fc116c6a 3324 int k;
20c03b7b 3325 char fn[PATH_MAX], *s, *b, *p;
fc116c6a
LP		 3326 dev_t devnr;
3327
3328 assert(r);
3329
4d6d6518
LP		 3330 k = get_ctty_devnr(pid, &devnr);
3331 if (k < 0)
fc116c6a
LP		 3332 return k;
3333
3334 snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr));
3335 char_array_0(fn);
3336
3337 if ((k = readlink_malloc(fn, &s)) < 0) {
3338
3339 if (k != -ENOENT)
3340 return k;
3341
46824d0e
LP		 3342 /* This is an ugly hack */
3343 if (major(devnr) == 136) {
3344 if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0)
3345 return -ENOMEM;
3346
3347 *r = b;
3348 if (_devnr)
3349 *_devnr = devnr;
3350
3351 return 0;
3352 }
3353
fc116c6a
LP		 3354 /* Probably something like the ptys which have no
3355 * symlink in /dev/char. Let's return something
3356 * vaguely useful. */
3357
3358 if (!(b = strdup(fn + 5)))
3359 return -ENOMEM;
3360
3361 *r = b;
46824d0e
LP		 3362 if (_devnr)
3363 *_devnr = devnr;
3364
fc116c6a
LP		 3365 return 0;
3366 }
3367
3368 if (startswith(s, "/dev/"))
3369 p = s + 5;
3370 else if (startswith(s, "../"))
3371 p = s + 3;
3372 else
3373 p = s;
3374
3375 b = strdup(p);
3376 free(s);
3377
3378 if (!b)
3379 return -ENOMEM;
3380
3381 *r = b;
46824d0e
LP		 3382 if (_devnr)
3383 *_devnr = devnr;
3384
fc116c6a
LP		 3385 return 0;
3386}
3387
ad293f5a 3388static int rm_rf_children(int fd, bool only_dirs, bool honour_sticky) {
8c6db833
LP		 3389 DIR *d;
3390 int ret = 0;
3391
3392 assert(fd >= 0);
3393
3394 /* This returns the first error we run into, but nevertheless
3395 * tries to go on */
3396
3397 if (!(d = fdopendir(fd))) {
3398 close_nointr_nofail(fd);
4c633005
LP		 3399
3400 return errno == ENOENT ? 0 : -errno;
8c6db833
LP		 3401 }
3402
3403 for (;;) {
3404 struct dirent buf, *de;
ad293f5a 3405 bool is_dir, keep_around = false;
8c6db833
LP		 3406 int r;
3407
3408 if ((r = readdir_r(d, &buf, &de)) != 0) {
3409 if (ret == 0)
3410 ret = -r;
3411 break;
3412 }
3413
3414 if (!de)
3415 break;
3416
3417 if (streq(de->d_name, ".") || streq(de->d_name, ".."))
3418 continue;
3419
3420 if (de->d_type == DT_UNKNOWN) {
3421 struct stat st;
3422
3423 if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
4c633005 3424 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3425 ret = -errno;
3426 continue;
3427 }
3428
ad293f5a
LP		 3429 if (honour_sticky)
3430 keep_around = st.st_uid == 0 && (st.st_mode & S_ISVTX);
3431
8c6db833 3432 is_dir = S_ISDIR(st.st_mode);
ad293f5a
LP		 3433
3434 } else {
3435 if (honour_sticky) {
3436 struct stat st;
3437
3438 if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
3439 if (ret == 0 && errno != ENOENT)
3440 ret = -errno;
3441 continue;
3442 }
3443
3444 keep_around = st.st_uid == 0 && (st.st_mode & S_ISVTX);
3445 }
3446
8c6db833 3447 is_dir = de->d_type == DT_DIR;
ad293f5a 3448 }
8c6db833
LP		 3449
3450 if (is_dir) {
3451 int subdir_fd;
3452
3453 if ((subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
4c633005 3454 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3455 ret = -errno;
3456 continue;
3457 }
3458
ad293f5a 3459 if ((r = rm_rf_children(subdir_fd, only_dirs, honour_sticky)) < 0) {
8c6db833
LP		 3460 if (ret == 0)
3461 ret = r;
3462 }
3463
ad293f5a
LP		 3464 if (!keep_around)
3465 if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
3466 if (ret == 0 && errno != ENOENT)
3467 ret = -errno;
3468 }
3469
3470 } else if (!only_dirs && !keep_around) {
8c6db833
LP		 3471
3472 if (unlinkat(fd, de->d_name, 0) < 0) {
4c633005 3473 if (ret == 0 && errno != ENOENT)
8c6db833
LP		 3474 ret = -errno;
3475 }
3476 }
3477 }
3478
3479 closedir(d);
3480
3481 return ret;
3482}
3483
ad293f5a 3484int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) {
8c6db833
LP		 3485 int fd;
3486 int r;
3487
3488 assert(path);
3489
3490 if ((fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
3491
3492 if (errno != ENOTDIR)
3493 return -errno;
3494
3495 if (delete_root && !only_dirs)
3496 if (unlink(path) < 0)
3497 return -errno;
3498
3499 return 0;
3500 }
3501
ad293f5a
LP		 3502 r = rm_rf_children(fd, only_dirs, honour_sticky);
3503
3504 if (delete_root) {
3505
3506 if (honour_sticky && file_is_sticky(path) > 0)
3507 return r;
8c6db833 3508
e27796a0 3509 if (rmdir(path) < 0 && errno != ENOENT) {
8c6db833
LP		 3510 if (r == 0)
3511 r = -errno;
3512 }
ad293f5a 3513 }
8c6db833
LP		 3514
3515 return r;
3516}
3517
3518int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
3519 assert(path);
3520
3521 /* Under the assumption that we are running privileged we
3522 * first change the access mode and only then hand out
3523 * ownership to avoid a window where access is too open. */
3524
3525 if (chmod(path, mode) < 0)
3526 return -errno;
3527
3528 if (chown(path, uid, gid) < 0)
3529 return -errno;
3530
3531 return 0;
ef2f1067
LP		 3532}
3533
f4b47811
LP		 3534int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) {
3535 assert(fd >= 0);
3536
3537 /* Under the assumption that we are running privileged we
3538 * first change the access mode and only then hand out
3539 * ownership to avoid a window where access is too open. */
3540
3541 if (fchmod(fd, mode) < 0)
3542 return -errno;
3543
3544 if (fchown(fd, uid, gid) < 0)
3545 return -errno;
3546
3547 return 0;
3548}
3549
82c121a4
LP		 3550cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
3551 cpu_set_t *r;
3552 unsigned n = 1024;
3553
3554 /* Allocates the cpuset in the right size */
3555
3556 for (;;) {
3557 if (!(r = CPU_ALLOC(n)))
3558 return NULL;
3559
3560 if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) {
3561 CPU_ZERO_S(CPU_ALLOC_SIZE(n), r);
3562
3563 if (ncpus)
3564 *ncpus = n;
3565
3566 return r;
3567 }
3568
3569 CPU_FREE(r);
3570
3571 if (errno != EINVAL)
3572 return NULL;
3573
3574 n *= 2;
3575 }
3576}
3577
67e5cc4f 3578void status_vprintf(const char *status, bool ellipse, const char *format, va_list ap) {
81beb750
LP		 3579 char *s = NULL, *spaces = NULL, *e;
3580 int fd = -1, c;
3581 size_t emax, sl, left;
3582 struct iovec iovec[5];
3583 int n = 0;
9e58ff9c
LP		 3584
3585 assert(format);
3586
3587 /* This independent of logging, as status messages are
3588 * optional and go exclusively to the console. */
3589
3590 if (vasprintf(&s, format, ap) < 0)
3591 goto finish;
3592
67e5cc4f 3593 fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
81beb750 3594 if (fd < 0)
9e58ff9c
LP		 3595 goto finish;
3596
67e5cc4f
LP		 3597 if (ellipse) {
3598 c = fd_columns(fd);
3599 if (c <= 0)
3600 c = 80;
81beb750 3601
67e5cc4f
LP		 3602 if (status) {
3603 sl = 2 + 6 + 1; /* " [" status "]" */
3604 emax = (size_t) c > sl ? c - sl - 1 : 0;
3605 } else
3606 emax = c - 1;
81beb750 3607
67e5cc4f
LP		 3608 e = ellipsize(s, emax, 75);
3609 if (e) {
3610 free(s);
3611 s = e;
3612 }
81beb750
LP		 3613 }
3614
3615 zero(iovec);
3616 IOVEC_SET_STRING(iovec[n++], s);
3617
67e5cc4f
LP		 3618 if (ellipse) {
3619 sl = strlen(s);
3620 left = emax > sl ? emax - sl : 0;
3621 if (left > 0) {
3622 spaces = malloc(left);
3623 if (spaces) {
3624 memset(spaces, ' ', left);
3625 iovec[n].iov_base = spaces;
3626 iovec[n].iov_len = left;
3627 n++;
3628 }
81beb750
LP		 3629 }
3630 }
3631
3632 if (status) {
3633 IOVEC_SET_STRING(iovec[n++], " [");
3634 IOVEC_SET_STRING(iovec[n++], status);
3635 IOVEC_SET_STRING(iovec[n++], "]\n");
3636 } else
3637 IOVEC_SET_STRING(iovec[n++], "\n");
3638
3639 writev(fd, iovec, n);
9e58ff9c
LP		 3640
3641finish:
3642 free(s);
81beb750 3643 free(spaces);
9e58ff9c
LP		 3644
3645 if (fd >= 0)
3646 close_nointr_nofail(fd);
3647}
3648
67e5cc4f 3649void status_printf(const char *status, bool ellipse, const char *format, ...) {
c846ff47
LP		 3650 va_list ap;
3651
3652 assert(format);
3653
3654 va_start(ap, format);
67e5cc4f 3655 status_vprintf(status, ellipse, format, ap);
c846ff47
LP		 3656 va_end(ap);
3657}
3658
3659void status_welcome(void) {
10aa7034
LP		 3660 char *pretty_name = NULL, *ansi_color = NULL;
3661 const char *const_pretty = NULL, *const_color = NULL;
3662 int r;
c846ff47 3663
10aa7034
LP		 3664 if ((r = parse_env_file("/etc/os-release", NEWLINE,
3665 "PRETTY_NAME", &pretty_name,
3666 "ANSI_COLOR", &ansi_color,
3667 NULL)) < 0) {
c846ff47 3668
10aa7034
LP		 3669 if (r != -ENOENT)
3670 log_warning("Failed to read /etc/os-release: %s", strerror(-r));
3671 }
c846ff47 3672
10aa7034
LP		 3673#if defined(TARGET_FEDORA)
3674 if (!pretty_name) {
3675 if ((r = read_one_line_file("/etc/system-release", &pretty_name)) < 0) {
c846ff47 3676
10aa7034
LP		 3677 if (r != -ENOENT)
3678 log_warning("Failed to read /etc/system-release: %s", strerror(-r));
6f9a471a 3679 }
10aa7034 3680 }
c846ff47 3681
10aa7034 3682 if (!ansi_color && pretty_name) {
c846ff47 3683
10aa7034
LP		 3684 /* This tries to mimic the color magic the old Red Hat sysinit
3685 * script did. */
3686
3687 if (startswith(pretty_name, "Red Hat"))
3688 const_color = "0;31"; /* Red for RHEL */
3689 else if (startswith(pretty_name, "Fedora"))
3690 const_color = "0;34"; /* Blue for Fedora */
3691 }
c846ff47
LP		 3692
3693#elif defined(TARGET_SUSE)
c846ff47 3694
10aa7034
LP		 3695 if (!pretty_name) {
3696 if ((r = read_one_line_file("/etc/SuSE-release", &pretty_name)) < 0) {
c846ff47 3697
10aa7034
LP		 3698 if (r != -ENOENT)
3699 log_warning("Failed to read /etc/SuSE-release: %s", strerror(-r));
6f9a471a 3700 }
10aa7034 3701 }
c846ff47 3702
10aa7034
LP		 3703 if (!ansi_color)
3704 const_color = "0;32"; /* Green for openSUSE */
5a6225fd 3705
0d37b36b 3706#elif defined(TARGET_GENTOO)
0d37b36b 3707
10aa7034
LP		 3708 if (!pretty_name) {
3709 if ((r = read_one_line_file("/etc/gentoo-release", &pretty_name)) < 0) {
0d37b36b 3710
10aa7034
LP		 3711 if (r != -ENOENT)
3712 log_warning("Failed to read /etc/gentoo-release: %s", strerror(-r));
6f9a471a 3713 }
10aa7034 3714 }
0d37b36b 3715
10aa7034
LP		 3716 if (!ansi_color)
3717 const_color = "1;34"; /* Light Blue for Gentoo */
5a6225fd 3718
a338bab5
AS		 3719#elif defined(TARGET_ALTLINUX)
3720
3721 if (!pretty_name) {
3722 if ((r = read_one_line_file("/etc/altlinux-release", &pretty_name)) < 0) {
3723
3724 if (r != -ENOENT)
3725 log_warning("Failed to read /etc/altlinux-release: %s", strerror(-r));
6f9a471a 3726 }
a338bab5
AS		 3727 }
3728
3729 if (!ansi_color)
3730 const_color = "0;36"; /* Cyan for ALTLinux */
3731
3732
5a6225fd 3733#elif defined(TARGET_DEBIAN)
5a6225fd 3734
10aa7034 3735 if (!pretty_name) {
22927a36 3736 char *version;
c8bffa43 3737
22927a36 3738 if ((r = read_one_line_file("/etc/debian_version", &version)) < 0) {
5a6225fd 3739
10aa7034
LP		 3740 if (r != -ENOENT)
3741 log_warning("Failed to read /etc/debian_version: %s", strerror(-r));
22927a36 3742 } else {
22927a36
MB		 3743 pretty_name = strappend("Debian ", version);
3744 free(version);
c8bffa43
LP		 3745
3746 if (!pretty_name)
3747 log_warning("Failed to allocate Debian version string.");
22927a36 3748 }
10aa7034 3749 }
5a6225fd 3750
10aa7034
LP		 3751 if (!ansi_color)
3752 const_color = "1;31"; /* Light Red for Debian */
5a6225fd 3753
274914f9 3754#elif defined(TARGET_UBUNTU)
10aa7034
LP		 3755
3756 if ((r = parse_env_file("/etc/lsb-release", NEWLINE,
3757 "DISTRIB_DESCRIPTION", &pretty_name,
3758 NULL)) < 0) {
3759
3760 if (r != -ENOENT)
3761 log_warning("Failed to read /etc/lsb-release: %s", strerror(-r));
3762 }
3763
3764 if (!ansi_color)
3765 const_color = "0;33"; /* Orange/Brown for Ubuntu */
3766
1de4d79b
AB		 3767#elif defined(TARGET_MANDRIVA)
3768
3769 if (!pretty_name) {
3770 char *s, *p;
3771
3772 if ((r = read_one_line_file("/etc/mandriva-release", &s) < 0)) {
3773 if (r != -ENOENT)
3774 log_warning("Failed to read /etc/mandriva-release: %s", strerror(-r));
3775 } else {
3776 p = strstr(s, " release ");
3777 if (p) {
3778 *p = '\0';
3779 p += 9;
3780 p[strcspn(p, " ")] = '\0';
3781
3782 /* This corresponds to standard rc.sysinit */
3783 if (asprintf(&pretty_name, "%s\x1B[0;39m %s", s, p) > 0)
3784 const_color = "1;36";
3785 else
3786 log_warning("Failed to allocate Mandriva version string.");
3787 } else
3788 log_warning("Failed to parse /etc/mandriva-release");
3789 free(s);
3790 }
3791 }
54e4fdef 3792#elif defined(TARGET_MEEGO)
1de4d79b 3793
54e4fdef
CF		 3794 if (!pretty_name) {
3795 if ((r = read_one_line_file("/etc/meego-release", &pretty_name)) < 0) {
3796
3797 if (r != -ENOENT)
3798 log_warning("Failed to read /etc/meego-release: %s", strerror(-r));
3799 }
3800 }
3801
3802 if (!ansi_color)
3803 const_color = "1;35"; /* Bright Magenta for MeeGo */
c846ff47 3804#endif
10aa7034
LP		 3805
3806 if (!pretty_name && !const_pretty)
3807 const_pretty = "Linux";
3808
3809 if (!ansi_color && !const_color)
3810 const_color = "1";
3811
81beb750 3812 status_printf(NULL,
67e5cc4f 3813 false,
81beb750 3814 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
10aa7034
LP		 3815 const_color ? const_color : ansi_color,
3816 const_pretty ? const_pretty : pretty_name);
86a3475b
LP		 3817
3818 free(ansi_color);
3819 free(pretty_name);
c846ff47
LP		 3820}
3821
fab56fc5
LP		 3822char *replace_env(const char *format, char **env) {
3823 enum {
3824 WORD,
c24eb49e 3825 CURLY,
fab56fc5
LP		 3826 VARIABLE
3827 } state = WORD;
3828
3829 const char *e, *word = format;
3830 char *r = NULL, *k;
3831
3832 assert(format);
3833
3834 for (e = format; *e; e ++) {
3835
3836 switch (state) {
3837
3838 case WORD:
3839 if (*e == '$')
c24eb49e 3840 state = CURLY;
fab56fc5
LP		 3841 break;
3842
c24eb49e
LP		 3843 case CURLY:
3844 if (*e == '{') {
fab56fc5
LP		 3845 if (!(k = strnappend(r, word, e-word-1)))
3846 goto fail;
3847
3848 free(r);
3849 r = k;
3850
3851 word = e-1;
3852 state = VARIABLE;
3853
3854 } else if (*e == '$') {
3855 if (!(k = strnappend(r, word, e-word)))
3856 goto fail;
3857
3858 free(r);
3859 r = k;
3860
3861 word = e+1;
3862 state = WORD;
3863 } else
3864 state = WORD;
3865 break;
3866
3867 case VARIABLE:
c24eb49e 3868 if (*e == '}') {
b95cf362 3869 const char *t;
fab56fc5 3870
b95cf362
LP		 3871 if (!(t = strv_env_get_with_length(env, word+2, e-word-2)))
3872 t = "";
fab56fc5 3873
b95cf362
LP		 3874 if (!(k = strappend(r, t)))
3875 goto fail;
fab56fc5 3876
b95cf362
LP		 3877 free(r);
3878 r = k;
fab56fc5 3879
b95cf362 3880 word = e+1;
fab56fc5
LP		 3881 state = WORD;
3882 }
3883 break;
3884 }
3885 }
3886
3887 if (!(k = strnappend(r, word, e-word)))
3888 goto fail;
3889
3890 free(r);
3891 return k;
3892
3893fail:
3894 free(r);
3895 return NULL;
3896}
3897
3898char **replace_env_argv(char **argv, char **env) {
3899 char **r, **i;
c24eb49e
LP		 3900 unsigned k = 0, l = 0;
3901
3902 l = strv_length(argv);
fab56fc5 3903
c24eb49e 3904 if (!(r = new(char*, l+1)))
fab56fc5
LP		 3905 return NULL;
3906
3907 STRV_FOREACH(i, argv) {
c24eb49e
LP		 3908
3909 /* If $FOO appears as single word, replace it by the split up variable */
b95cf362
LP		 3910 if ((*i)[0] == '$' && (*i)[1] != '{') {
3911 char *e;
3912 char **w, **m;
3913 unsigned q;
c24eb49e 3914
b95cf362 3915 if ((e = strv_env_get(env, *i+1))) {
c24eb49e
LP		 3916
3917 if (!(m = strv_split_quoted(e))) {
3918 r[k] = NULL;
3919 strv_free(r);
3920 return NULL;
3921 }
b95cf362
LP		 3922 } else
3923 m = NULL;
c24eb49e 3924
b95cf362
LP		 3925 q = strv_length(m);
3926 l = l + q - 1;
c24eb49e 3927
b95cf362
LP		 3928 if (!(w = realloc(r, sizeof(char*) * (l+1)))) {
3929 r[k] = NULL;
3930 strv_free(r);
3931 strv_free(m);
3932 return NULL;
3933 }
c24eb49e 3934
b95cf362
LP		 3935 r = w;
3936 if (m) {
c24eb49e
LP		 3937 memcpy(r + k, m, q * sizeof(char*));
3938 free(m);
c24eb49e 3939 }
b95cf362
LP		 3940
3941 k += q;
3942 continue;
c24eb49e
LP		 3943 }
3944
3945 /* If ${FOO} appears as part of a word, replace it by the variable as-is */
fab56fc5
LP		 3946 if (!(r[k++] = replace_env(*i, env))) {
3947 strv_free(r);
3948 return NULL;
3949 }
3950 }
3951
3952 r[k] = NULL;
3953 return r;
3954}
3955
81beb750
LP		 3956int fd_columns(int fd) {
3957 struct winsize ws;
3958 zero(ws);
3959
3960 if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
3961 return -errno;
3962
3963 if (ws.ws_col <= 0)
3964 return -EIO;
3965
3966 return ws.ws_col;
3967}
3968
72f59706 3969unsigned columns(void) {
fa776d8e
LP		 3970 static __thread int parsed_columns = 0;
3971 const char *e;
3972
3bfc7184 3973 if (_likely_(parsed_columns > 0))
fa776d8e
LP		 3974 return parsed_columns;
3975
81beb750
LP		 3976 e = getenv("COLUMNS");
3977 if (e)
fa776d8e
LP		 3978 parsed_columns = atoi(e);
3979
81beb750
LP		 3980 if (parsed_columns <= 0)
3981 parsed_columns = fd_columns(STDOUT_FILENO);
fa776d8e
LP		 3982
3983 if (parsed_columns <= 0)
3984 parsed_columns = 80;
3985
3986 return parsed_columns;
3987}
3988
b4f10a5e
LP		 3989int running_in_chroot(void) {
3990 struct stat a, b;
3991
3992 zero(a);
3993 zero(b);
3994
3995 /* Only works as root */
3996
3997 if (stat("/proc/1/root", &a) < 0)
3998 return -errno;
3999
4000 if (stat("/", &b) < 0)
4001 return -errno;
4002
4003 return
4004 a.st_dev != b.st_dev ||
4005 a.st_ino != b.st_ino;
4006}
4007
72f59706
LP		 4008char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) {
4009 size_t x;
8fe914ec
LP		 4010 char *r;
4011
4012 assert(s);
4013 assert(percent <= 100);
72f59706 4014 assert(new_length >= 3);
8fe914ec 4015
72f59706
LP		 4016 if (old_length <= 3 || old_length <= new_length)
4017 return strndup(s, old_length);
8fe914ec 4018
72f59706
LP		 4019 r = new0(char, new_length+1);
4020 if (!r)
8fe914ec
LP		 4021 return r;
4022
72f59706 4023 x = (new_length * percent) / 100;
8fe914ec 4024
72f59706
LP		 4025 if (x > new_length - 3)
4026 x = new_length - 3;
8fe914ec
LP		 4027
4028 memcpy(r, s, x);
4029 r[x] = '.';
4030 r[x+1] = '.';
4031 r[x+2] = '.';
4032 memcpy(r + x + 3,
72f59706
LP		 4033 s + old_length - (new_length - x - 3),
4034 new_length - x - 3);
8fe914ec
LP		 4035
4036 return r;
4037}
4038
72f59706
LP		 4039char *ellipsize(const char *s, size_t length, unsigned percent) {
4040 return ellipsize_mem(s, strlen(s), length, percent);
4041}
4042
f6144808
LP		 4043int touch(const char *path) {
4044 int fd;
4045
4046 assert(path);
4047
14f3c825 4048 if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0)
f6144808
LP		 4049 return -errno;
4050
4051 close_nointr_nofail(fd);
4052 return 0;
4053}
afea26ad 4054
97c4a07d 4055char *unquote(const char *s, const char* quotes) {
11ce3427
LP		 4056 size_t l;
4057 assert(s);
4058
4059 if ((l = strlen(s)) < 2)
4060 return strdup(s);
4061
97c4a07d 4062 if (strchr(quotes, s[0]) && s[l-1] == s[0])
11ce3427
LP		 4063 return strndup(s+1, l-2);
4064
4065 return strdup(s);
4066}
4067
5f7c426e
LP		 4068char *normalize_env_assignment(const char *s) {
4069 char *name, *value, *p, *r;
4070
4071 p = strchr(s, '=');
4072
4073 if (!p) {
4074 if (!(r = strdup(s)))
4075 return NULL;
4076
4077 return strstrip(r);
4078 }
4079
4080 if (!(name = strndup(s, p - s)))
4081 return NULL;
4082
4083 if (!(p = strdup(p+1))) {
4084 free(name);
4085 return NULL;
4086 }
4087
4088 value = unquote(strstrip(p), QUOTES);
4089 free(p);
4090
4091 if (!value) {
5f7c426e
LP		 4092 free(name);
4093 return NULL;
4094 }
4095
4096 if (asprintf(&r, "%s=%s", name, value) < 0)
4097 r = NULL;
4098
4099 free(value);
4100 free(name);
4101
4102 return r;
4103}
4104
8e12a6ae 4105int wait_for_terminate(pid_t pid, siginfo_t *status) {
1968a360
LP		 4106 siginfo_t dummy;
4107
2e78aa99 4108 assert(pid >= 1);
1968a360
LP		 4109
4110 if (!status)
4111 status = &dummy;
2e78aa99
LP		 4112
4113 for (;;) {
8e12a6ae
LP		 4114 zero(*status);
4115
4116 if (waitid(P_PID, pid, status, WEXITED) < 0) {
2e78aa99
LP		 4117
4118 if (errno == EINTR)
4119 continue;
4120
4121 return -errno;
4122 }
4123
4124 return 0;
4125 }
4126}
4127
97c4a07d
LP		 4128int wait_for_terminate_and_warn(const char *name, pid_t pid) {
4129 int r;
4130 siginfo_t status;
4131
4132 assert(name);
4133 assert(pid > 1);
4134
4135 if ((r = wait_for_terminate(pid, &status)) < 0) {
4136 log_warning("Failed to wait for %s: %s", name, strerror(-r));
4137 return r;
4138 }
4139
4140 if (status.si_code == CLD_EXITED) {
4141 if (status.si_status != 0) {
4142 log_warning("%s failed with error code %i.", name, status.si_status);
0a27cf3f 4143 return status.si_status;
97c4a07d
LP		 4144 }
4145
4146 log_debug("%s succeeded.", name);
4147 return 0;
4148
4149 } else if (status.si_code == CLD_KILLED ||
4150 status.si_code == CLD_DUMPED) {
4151
4152 log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status));
4153 return -EPROTO;
4154 }
4155
4156 log_warning("%s failed due to unknown reason.", name);
4157 return -EPROTO;
4158
4159}
4160
3c14d26c 4161void freeze(void) {
720ce21d
LP		 4162
4163 /* Make sure nobody waits for us on a socket anymore */
4164 close_all_fds(NULL, 0);
4165
c29597a1
LP		 4166 sync();
4167
3c14d26c
LP		 4168 for (;;)
4169 pause();
4170}
4171
00dc5d76
LP		 4172bool null_or_empty(struct stat *st) {
4173 assert(st);
4174
4175 if (S_ISREG(st->st_mode) && st->st_size <= 0)
4176 return true;
4177
c8f26f42 4178 if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode))
00dc5d76
LP		 4179 return true;
4180
4181 return false;
4182}
4183
83096483
LP		 4184int null_or_empty_path(const char *fn) {
4185 struct stat st;
4186
4187 assert(fn);
4188
4189 if (stat(fn, &st) < 0)
4190 return -errno;
4191
4192 return null_or_empty(&st);
4193}
4194
a247755d 4195DIR *xopendirat(int fd, const char *name, int flags) {
c4731d11
LP		 4196 int nfd;
4197 DIR *d;
4198
4199 if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0)
4200 return NULL;
4201
4202 if (!(d = fdopendir(nfd))) {
4203 close_nointr_nofail(nfd);
4204 return NULL;
4205 }
4206
4207 return d;
3b63d2d3
LP		 4208}
4209
8a0867d6
LP		 4210int signal_from_string_try_harder(const char *s) {
4211 int signo;
4212 assert(s);
4213
4214 if ((signo = signal_from_string(s)) <= 0)
4215 if (startswith(s, "SIG"))
4216 return signal_from_string(s+3);
4217
4218 return signo;
4219}
4220
10717a1a
LP		 4221void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) {
4222
4223 assert(f);
4224 assert(name);
4225 assert(t);
4226
4227 if (!dual_timestamp_is_set(t))
4228 return;
4229
4230 fprintf(f, "%s=%llu %llu\n",
4231 name,
4232 (unsigned long long) t->realtime,
4233 (unsigned long long) t->monotonic);
4234}
4235
799fd0fd 4236void dual_timestamp_deserialize(const char *value, dual_timestamp *t) {
10717a1a
LP		 4237 unsigned long long a, b;
4238
10717a1a
LP		 4239 assert(value);
4240 assert(t);
4241
4242 if (sscanf(value, "%lli %llu", &a, &b) != 2)
4243 log_debug("Failed to parse finish timestamp value %s", value);
4244 else {
4245 t->realtime = a;
4246 t->monotonic = b;
4247 }
4248}
4249
e23a0ce8
LP		 4250char *fstab_node_to_udev_node(const char *p) {
4251 char *dn, *t, *u;
4252 int r;
4253
4254 /* FIXME: to follow udev's logic 100% we need to leave valid
4255 * UTF8 chars unescaped */
4256
4257 if (startswith(p, "LABEL=")) {
4258
4259 if (!(u = unquote(p+6, "\"\'")))
4260 return NULL;
4261
4262 t = xescape(u, "/ ");
4263 free(u);
4264
4265 if (!t)
4266 return NULL;
4267
4268 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
4269 free(t);
4270
4271 if (r < 0)
4272 return NULL;
4273
4274 return dn;
4275 }
4276
4277 if (startswith(p, "UUID=")) {
4278
4279 if (!(u = unquote(p+5, "\"\'")))
4280 return NULL;
4281
4282 t = xescape(u, "/ ");
4283 free(u);
4284
4285 if (!t)
4286 return NULL;
4287
0058d7b9 4288 r = asprintf(&dn, "/dev/disk/by-uuid/%s", t);
e23a0ce8
LP		 4289 free(t);
4290
4291 if (r < 0)
4292 return NULL;
4293
4294 return dn;
4295 }
4296
4297 return strdup(p);
4298}
4299
e9ddabc2
LP		 4300void filter_environ(const char *prefix) {
4301 int i, j;
4302 assert(prefix);
4303
4304 if (!environ)
4305 return;
4306
4307 for (i = 0, j = 0; environ[i]; i++) {
4308
4309 if (startswith(environ[i], prefix))
4310 continue;
4311
4312 environ[j++] = environ[i];
4313 }
4314
4315 environ[j] = NULL;
4316}
4317
f212ac12
LP		 4318bool tty_is_vc(const char *tty) {
4319 assert(tty);
4320
4321 if (startswith(tty, "/dev/"))
4322 tty += 5;
4323
98a28fef
LP		 4324 return vtnr_from_tty(tty) >= 0;
4325}
4326
4327int vtnr_from_tty(const char *tty) {
4328 int i, r;
4329
4330 assert(tty);
4331
4332 if (startswith(tty, "/dev/"))
4333 tty += 5;
4334
4335 if (!startswith(tty, "tty") )
4336 return -EINVAL;
4337
4338 if (tty[3] < '0' || tty[3] > '9')
4339 return -EINVAL;
4340
4341 r = safe_atoi(tty+3, &i);
4342 if (r < 0)
4343 return r;
4344
4345 if (i < 0 || i > 63)
4346 return -EINVAL;
4347
4348 return i;
f212ac12
LP		 4349}
4350
e3aa71c3 4351const char *default_term_for_tty(const char *tty) {
3030ccd7
LP		 4352 char *active = NULL;
4353 const char *term;
4354
e3aa71c3
LP		 4355 assert(tty);
4356
4357 if (startswith(tty, "/dev/"))
4358 tty += 5;
4359
3030ccd7
LP		 4360 /* Resolve where /dev/console is pointing when determining
4361 * TERM */
4362 if (streq(tty, "console"))
4363 if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) {
079a09fb
LP		 4364 /* If multiple log outputs are configured the
4365 * last one is what /dev/console points to */
4366 if ((tty = strrchr(active, ' ')))
4367 tty++;
4368 else
4369 tty = active;
3030ccd7
LP		 4370 }
4371
f212ac12 4372 term = tty_is_vc(tty) ? "TERM=linux" : "TERM=vt100";
3030ccd7 4373 free(active);
e3aa71c3 4374
3030ccd7 4375 return term;
e3aa71c3
LP		 4376}
4377
87d2c1ff 4378bool dirent_is_file(const struct dirent *de) {
fb19a739
LP		 4379 assert(de);
4380
4381 if (ignore_file(de->d_name))
4382 return false;
4383
4384 if (de->d_type != DT_REG &&
4385 de->d_type != DT_LNK &&
4386 de->d_type != DT_UNKNOWN)
4387 return false;
4388
4389 return true;
4390}
4391
87d2c1ff
LP		 4392bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) {
4393 assert(de);
4394
4395 if (!dirent_is_file(de))
4396 return false;
4397
4398 return endswith(de->d_name, suffix);
4399}
4400
83cc030f
LP		 4401void execute_directory(const char *directory, DIR *d, char *argv[]) {
4402 DIR *_d = NULL;
4403 struct dirent *de;
4404 Hashmap *pids = NULL;
4405
4406 assert(directory);
4407
4408 /* Executes all binaries in a directory in parallel and waits
4409 * until all they all finished. */
4410
4411 if (!d) {
4412 if (!(_d = opendir(directory))) {
4413
4414 if (errno == ENOENT)
4415 return;
4416
4417 log_error("Failed to enumerate directory %s: %m", directory);
4418 return;
4419 }
4420
4421 d = _d;
4422 }
4423
4424 if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) {
4425 log_error("Failed to allocate set.");
4426 goto finish;
4427 }
4428
4429 while ((de = readdir(d))) {
4430 char *path;
4431 pid_t pid;
4432 int k;
4433
fb19a739 4434 if (!dirent_is_file(de))
83cc030f
LP		 4435 continue;
4436
4437 if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) {
4438 log_error("Out of memory");
4439 continue;
4440 }
4441
4442 if ((pid = fork()) < 0) {
4443 log_error("Failed to fork: %m");
4444 free(path);
4445 continue;
4446 }
4447
4448 if (pid == 0) {
4449 char *_argv[2];
4450 /* Child */
4451
4452 if (!argv) {
4453 _argv[0] = path;
4454 _argv[1] = NULL;
4455 argv = _argv;
4456 } else
4457 if (!argv[0])
4458 argv[0] = path;
4459
4460 execv(path, argv);
4461
4462 log_error("Failed to execute %s: %m", path);
4463 _exit(EXIT_FAILURE);
4464 }
4465
4466 log_debug("Spawned %s as %lu", path, (unsigned long) pid);
4467
4468 if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) {
4469 log_error("Failed to add PID to set: %s", strerror(-k));
4470 free(path);
4471 }
4472 }
4473
4474 while (!hashmap_isempty(pids)) {
4475 siginfo_t si;
4476 char *path;
4477
4478 zero(si);
4479 if (waitid(P_ALL, 0, &si, WEXITED) < 0) {
4480
4481 if (errno == EINTR)
4482 continue;
4483
4484 log_error("waitid() failed: %m");
4485 goto finish;
4486 }
4487
4488 if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) {
4489 if (!is_clean_exit(si.si_code, si.si_status)) {
4490 if (si.si_code == CLD_EXITED)
4491 log_error("%s exited with exit status %i.", path, si.si_status);
4492 else
4493 log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status));
4494 } else
4495 log_debug("%s exited successfully.", path);
4496
4497 free(path);
4498 }
4499 }
4500
4501finish:
4502 if (_d)
4503 closedir(_d);
4504
4505 if (pids)
4506 hashmap_free_free(pids);
4507}
4508
430c18ed
LP		 4509int kill_and_sigcont(pid_t pid, int sig) {
4510 int r;
4511
4512 r = kill(pid, sig) < 0 ? -errno : 0;
4513
4514 if (r >= 0)
4515 kill(pid, SIGCONT);
4516
4517 return r;
4518}
4519
05feefe0
LP		 4520bool nulstr_contains(const char*nulstr, const char *needle) {
4521 const char *i;
4522
4523 if (!nulstr)
4524 return false;
4525
4526 NULSTR_FOREACH(i, nulstr)
4527 if (streq(i, needle))
4528 return true;
4529
4530 return false;
4531}
4532
6faa1114 4533bool plymouth_running(void) {
9408a2d2 4534 return access("/run/plymouth/pid", F_OK) >= 0;
6faa1114
LP		 4535}
4536
7c3b203c
LP		 4537void parse_syslog_priority(char **p, int *priority) {
4538 int a = 0, b = 0, c = 0;
4539 int k;
4540
4541 assert(p);
4542 assert(*p);
4543 assert(priority);
4544
4545 if ((*p)[0] != '<')
4546 return;
4547
4548 if (!strchr(*p, '>'))
4549 return;
4550
4551 if ((*p)[2] == '>') {
4552 c = undecchar((*p)[1]);
4553 k = 3;
4554 } else if ((*p)[3] == '>') {
4555 b = undecchar((*p)[1]);
4556 c = undecchar((*p)[2]);
4557 k = 4;
4558 } else if ((*p)[4] == '>') {
4559 a = undecchar((*p)[1]);
4560 b = undecchar((*p)[2]);
4561 c = undecchar((*p)[3]);
4562 k = 5;
4563 } else
4564 return;
4565
4566 if (a < 0 || b < 0 || c < 0)
4567 return;
4568
4569 *priority = a*100+b*10+c;
4570 *p += k;
4571}
4572
87d2c1ff
LP		 4573void skip_syslog_pid(char **buf) {
4574 char *p;
4575
4576 assert(buf);
4577 assert(*buf);
4578
4579 p = *buf;
4580
4581 if (*p != '[')
4582 return;
4583
4584 p++;
4585 p += strspn(p, "0123456789");
4586
4587 if (*p != ']')
4588 return;
4589
4590 p++;
4591
4592 *buf = p;
4593}
4594
4595void skip_syslog_date(char **buf) {
4596 enum {
4597 LETTER,
4598 SPACE,
4599 NUMBER,
4600 SPACE_OR_NUMBER,
4601 COLON
4602 } sequence[] = {
4603 LETTER, LETTER, LETTER,
4604 SPACE,
4605 SPACE_OR_NUMBER, NUMBER,
4606 SPACE,
4607 SPACE_OR_NUMBER, NUMBER,
4608 COLON,
4609 SPACE_OR_NUMBER, NUMBER,
4610 COLON,
4611 SPACE_OR_NUMBER, NUMBER,
4612 SPACE
4613 };
4614
4615 char *p;
4616 unsigned i;
4617
4618 assert(buf);
4619 assert(*buf);
4620
4621 p = *buf;
4622
4623 for (i = 0; i < ELEMENTSOF(sequence); i++, p++) {
4624
4625 if (!*p)
4626 return;
4627
4628 switch (sequence[i]) {
4629
4630 case SPACE:
4631 if (*p != ' ')
4632 return;
4633 break;
4634
4635 case SPACE_OR_NUMBER:
4636 if (*p == ' ')
4637 break;
4638
4639 /* fall through */
4640
4641 case NUMBER:
4642 if (*p < '0' || *p > '9')
4643 return;
4644
4645 break;
4646
4647 case LETTER:
4648 if (!(*p >= 'A' && *p <= 'Z') &&
4649 !(*p >= 'a' && *p <= 'z'))
4650 return;
4651
4652 break;
4653
4654 case COLON:
4655 if (*p != ':')
4656 return;
4657 break;
4658
4659 }
4660 }
4661
4662 *buf = p;
4663}
4664
ac123445
LP		 4665int have_effective_cap(int value) {
4666 cap_t cap;
4667 cap_flag_value_t fv;
4668 int r;
4669
4670 if (!(cap = cap_get_proc()))
4671 return -errno;
4672
4673 if (cap_get_flag(cap, value, CAP_EFFECTIVE, &fv) < 0)
4674 r = -errno;
4675 else
4676 r = fv == CAP_SET;
4677
4678 cap_free(cap);
4679 return r;
4680}
4681
9beb3f4d
LP		 4682char* strshorten(char *s, size_t l) {
4683 assert(s);
4684
4685 if (l < strlen(s))
4686 s[l] = 0;
4687
4688 return s;
4689}
4690
4691static bool hostname_valid_char(char c) {
4692 return
4693 (c >= 'a' && c <= 'z') ||
4694 (c >= 'A' && c <= 'Z') ||
4695 (c >= '0' && c <= '9') ||
4696 c == '-' ||
4697 c == '_' ||
4698 c == '.';
4699}
4700
4701bool hostname_is_valid(const char *s) {
4702 const char *p;
4703
4704 if (isempty(s))
4705 return false;
4706
4707 for (p = s; *p; p++)
4708 if (!hostname_valid_char(*p))
4709 return false;
4710
4711 if (p-s > HOST_NAME_MAX)
4712 return false;
4713
4714 return true;
4715}
4716
4717char* hostname_cleanup(char *s) {
4718 char *p, *d;
4719
4720 for (p = s, d = s; *p; p++)
4721 if ((*p >= 'a' && *p <= 'z') ||
4722 (*p >= 'A' && *p <= 'Z') ||
4723 (*p >= '0' && *p <= '9') ||
4724 *p == '-' ||
4725 *p == '_' ||
4726 *p == '.')
4727 *(d++) = *p;
4728
4729 *d = 0;
4730
4731 strshorten(s, HOST_NAME_MAX);
4732 return s;
4733}
4734
1325aa42
LP		 4735int pipe_eof(int fd) {
4736 struct pollfd pollfd;
4737 int r;
4738
4739 zero(pollfd);
4740 pollfd.fd = fd;
4741 pollfd.events = POLLIN|POLLHUP;
4742
4743 r = poll(&pollfd, 1, 0);
4744 if (r < 0)
4745 return -errno;
4746
4747 if (r == 0)
4748 return 0;
4749
4750 return pollfd.revents & POLLHUP;
4751}
4752
df50185b
LP		 4753int fd_wait_for_event(int fd, int event) {
4754 struct pollfd pollfd;
4755 int r;
4756
4757 zero(pollfd);
4758 pollfd.fd = fd;
4759 pollfd.events = event;
4760
4761 r = poll(&pollfd, 1, -1);
4762 if (r < 0)
4763 return -errno;
4764
4765 if (r == 0)
4766 return 0;
4767
4768 return pollfd.revents;
4769}
4770
5a3ab509
LP		 4771int fopen_temporary(const char *path, FILE **_f, char **_temp_path) {
4772 FILE *f;
4773 char *t;
4774 const char *fn;
4775 size_t k;
4776 int fd;
4777
4778 assert(path);
4779 assert(_f);
4780 assert(_temp_path);
4781
4782 t = new(char, strlen(path) + 1 + 6 + 1);
4783 if (!t)
4784 return -ENOMEM;
4785
4786 fn = file_name_from_path(path);
4787 k = fn-path;
4788 memcpy(t, path, k);
4789 t[k] = '.';
4790 stpcpy(stpcpy(t+k+1, fn), "XXXXXX");
4791
4792 fd = mkostemp(t, O_WRONLY|O_CLOEXEC);
4793 if (fd < 0) {
4794 free(t);
4795 return -errno;
4796 }
4797
4798 f = fdopen(fd, "we");
4799 if (!f) {
4800 unlink(t);
4801 free(t);
4802 return -errno;
4803 }
4804
4805 *_f = f;
4806 *_temp_path = t;
4807
4808 return 0;
4809}
4810
6ea832a2 4811int terminal_vhangup_fd(int fd) {
5a3ab509
LP		 4812 assert(fd >= 0);
4813
6ea832a2
LP		 4814 if (ioctl(fd, TIOCVHANGUP) < 0)
4815 return -errno;
4816
4817 return 0;
4818}
4819
4820int terminal_vhangup(const char *name) {
4821 int fd, r;
4822
4823 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
4824 if (fd < 0)
4825 return fd;
4826
4827 r = terminal_vhangup_fd(fd);
4828 close_nointr_nofail(fd);
4829
4830 return r;
4831}
4832
4833int vt_disallocate(const char *name) {
4834 int fd, r;
4835 unsigned u;
6ea832a2
LP		 4836
4837 /* Deallocate the VT if possible. If not possible
4838 * (i.e. because it is the active one), at least clear it
4839 * entirely (including the scrollback buffer) */
4840
b83bc4e9
LP		 4841 if (!startswith(name, "/dev/"))
4842 return -EINVAL;
4843
4844 if (!tty_is_vc(name)) {
4845 /* So this is not a VT. I guess we cannot deallocate
4846 * it then. But let's at least clear the screen */
4847
4848 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
4849 if (fd < 0)
4850 return fd;
4851
8585357a
LP		 4852 loop_write(fd,
4853 "\033[r" /* clear scrolling region */
4854 "\033[H" /* move home */
4855 "\033[2J", /* clear screen */
4856 10, false);
b83bc4e9
LP		 4857 close_nointr_nofail(fd);
4858
4859 return 0;
4860 }
6ea832a2
LP		 4861
4862 if (!startswith(name, "/dev/tty"))
4863 return -EINVAL;
4864
4865 r = safe_atou(name+8, &u);
4866 if (r < 0)
4867 return r;
4868
4869 if (u <= 0)
b83bc4e9 4870 return -EINVAL;
6ea832a2 4871
b83bc4e9 4872 /* Try to deallocate */
6ea832a2
LP		 4873 fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
4874 if (fd < 0)
4875 return fd;
4876
4877 r = ioctl(fd, VT_DISALLOCATE, u);
b83bc4e9 4878 close_nointr_nofail(fd);
6ea832a2 4879
b83bc4e9
LP		 4880 if (r >= 0)
4881 return 0;
6ea832a2 4882
b83bc4e9 4883 if (errno != EBUSY)
6ea832a2 4884 return -errno;
6ea832a2 4885
b83bc4e9
LP		 4886 /* Couldn't deallocate, so let's clear it fully with
4887 * scrollback */
4888 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
6ea832a2 4889 if (fd < 0)
b83bc4e9 4890 return fd;
6ea832a2 4891
8585357a
LP		 4892 loop_write(fd,
4893 "\033[r" /* clear scrolling region */
4894 "\033[H" /* move home */
4895 "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */
4896 10, false);
b83bc4e9 4897 close_nointr_nofail(fd);
6ea832a2 4898
b83bc4e9 4899 return 0;
6ea832a2
LP		 4900}
4901
db1413d7
KS		 4902static int files_add(Hashmap *h, const char *path, const char *suffix) {
4903 DIR *dir;
f782b8d0 4904 struct dirent buffer, *de;
db1413d7
KS		 4905 int r = 0;
4906
4907 dir = opendir(path);
4908 if (!dir) {
4909 if (errno == ENOENT)
4910 return 0;
4911 return -errno;
4912 }
4913
f782b8d0
LP		 4914 for (;;) {
4915 int k;
223a3558 4916 char *p, *f;
f782b8d0
LP		 4917
4918 k = readdir_r(dir, &buffer, &de);
4919 if (k != 0) {
4920 r = -k;
4921 goto finish;
4922 }
4923
4924 if (!de)
4925 break;
db1413d7 4926
87d2c1ff 4927 if (!dirent_is_file_with_suffix(de, suffix))
db1413d7
KS		 4928 continue;
4929
223a3558 4930 if (asprintf(&p, "%s/%s", path, de->d_name) < 0) {
db1413d7
KS		 4931 r = -ENOMEM;
4932 goto finish;
4933 }
4934
223a3558
KS		 4935 f = canonicalize_file_name(p);
4936 if (!f) {
4937 log_error("Failed to canonicalize file name '%s': %m", p);
4938 free(p);
4939 continue;
4940 }
4941 free(p);
4942
db1413d7 4943 log_debug("found: %s\n", f);
f782b8d0 4944 if (hashmap_put(h, file_name_from_path(f), f) <= 0)
db1413d7
KS		 4945 free(f);
4946 }
4947
4948finish:
4949 closedir(dir);
4950 return r;
4951}
4952
4953static int base_cmp(const void *a, const void *b) {
4954 const char *s1, *s2;
4955
4956 s1 = *(char * const *)a;
4957 s2 = *(char * const *)b;
4958 return strcmp(file_name_from_path(s1), file_name_from_path(s2));
4959}
4960
44143309 4961int conf_files_list(char ***strv, const char *suffix, const char *dir, ...) {
223a3558
KS		 4962 Hashmap *fh = NULL;
4963 char **dirs = NULL;
db1413d7 4964 char **files = NULL;
223a3558 4965 char **p;
db1413d7 4966 va_list ap;
44143309 4967 int r = 0;
db1413d7 4968
223a3558
KS		 4969 va_start(ap, dir);
4970 dirs = strv_new_ap(dir, ap);
4971 va_end(ap);
4972 if (!dirs) {
4973 r = -ENOMEM;
4974 goto finish;
4975 }
4976 if (!strv_path_canonicalize(dirs)) {
4977 r = -ENOMEM;
4978 goto finish;
4979 }
4980 if (!strv_uniq(dirs)) {
4981 r = -ENOMEM;
4982 goto finish;
4983 }
4984
db1413d7
KS		 4985 fh = hashmap_new(string_hash_func, string_compare_func);
4986 if (!fh) {
44143309 4987 r = -ENOMEM;
db1413d7
KS		 4988 goto finish;
4989 }
4990
223a3558
KS		 4991 STRV_FOREACH(p, dirs) {
4992 if (files_add(fh, *p, suffix) < 0) {
db1413d7 4993 log_error("Failed to search for files.");
44143309 4994 r = -EINVAL;
db1413d7
KS		 4995 goto finish;
4996 }
db1413d7 4997 }
db1413d7
KS		 4998
4999 files = hashmap_get_strv(fh);
5000 if (files == NULL) {
5001 log_error("Failed to compose list of files.");
44143309 5002 r = -ENOMEM;
db1413d7
KS		 5003 goto finish;
5004 }
5005
5006 qsort(files, hashmap_size(fh), sizeof(char *), base_cmp);
8d0e38a2 5007
db1413d7 5008finish:
223a3558 5009 strv_free(dirs);
db1413d7 5010 hashmap_free(fh);
44143309
KS		 5011 *strv = files;
5012 return r;
db1413d7 5013}
7948c4df 5014
2076cf88 5015int hwclock_is_localtime(void) {
7948c4df 5016 FILE *f;
7948c4df
KS		 5017 bool local = false;
5018
5019 /*
5020 * The third line of adjtime is "UTC" or "LOCAL" or nothing.
5021 * # /etc/adjtime
2076cf88 5022 * 0.0 0 0
7948c4df
KS		 5023 * 0
5024 * UTC
5025 */
5026 f = fopen("/etc/adjtime", "re");
5027 if (f) {
2076cf88
LP		 5028 char line[LINE_MAX];
5029 bool b;
5030
5031 b = fgets(line, sizeof(line), f) &&
5032 fgets(line, sizeof(line), f) &&
5033 fgets(line, sizeof(line), f);
5034
7948c4df 5035 fclose(f);
2076cf88
LP		 5036
5037 if (!b)
5038 return -EIO;
5039
5040
5041 truncate_nl(line);
5042 local = streq(line, "LOCAL");
5043
5044 } else if (errno != -ENOENT)
5045 return -errno;
5046
7948c4df
KS		 5047 return local;
5048}
5049
ff4daf5a 5050int hwclock_apply_localtime_delta(int *min) {
7948c4df 5051 const struct timeval *tv_null = NULL;
2076cf88 5052 struct timespec ts;
7948c4df
KS		 5053 struct tm *tm;
5054 int minuteswest;
5055 struct timezone tz;
5056
2076cf88
LP		 5057 assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0);
5058 assert_se(tm = localtime(&ts.tv_sec));
7948c4df
KS		 5059 minuteswest = tm->tm_gmtoff / 60;
5060
5061 tz.tz_minuteswest = -minuteswest;
5062 tz.tz_dsttime = 0; /* DST_NONE*/
5063
5064 /*
5065 * If the hardware clock does not run in UTC, but in local time:
5066 * The very first time we set the kernel's timezone, it will warp
5067 * the clock so that it runs in UTC instead of local time.
5068 */
5069 if (settimeofday(tv_null, &tz) < 0)
5070 return -errno;
ff4daf5a
KS		 5071 if (min)
5072 *min = minuteswest;
5073 return 0;
2076cf88
LP		 5074}
5075
5076int hwclock_reset_localtime_delta(void) {
5077 const struct timeval *tv_null = NULL;
5078 struct timezone tz;
5079
5080 tz.tz_minuteswest = 0;
5081 tz.tz_dsttime = 0; /* DST_NONE*/
5082
5083 if (settimeofday(tv_null, &tz) < 0)
5084 return -errno;
5085
5086 return 0;
7948c4df
KS		 5087}
5088
5089int hwclock_get_time(struct tm *tm) {
5090 int fd;
5091 int err = 0;
5092
2076cf88
LP		 5093 assert(tm);
5094
7948c4df
KS		 5095 fd = open("/dev/rtc0", O_RDONLY|O_CLOEXEC);
5096 if (fd < 0)
5097 return -errno;
2076cf88
LP		 5098
5099 /* This leaves the timezone fields of struct tm
5100 * uninitialized! */
7948c4df
KS		 5101 if (ioctl(fd, RTC_RD_TIME, tm) < 0)
5102 err = -errno;
2076cf88
LP		 5103
5104 /* We don't now daylight saving, so we reset this in order not
5105 * to confused mktime(). */
5106 tm->tm_isdst = -1;
5107
5108 close_nointr_nofail(fd);
7948c4df
KS		 5109
5110 return err;
5111}
5112
5113int hwclock_set_time(const struct tm *tm) {
5114 int fd;
5115 int err = 0;
5116
2076cf88
LP		 5117 assert(tm);
5118
7948c4df
KS		 5119 fd = open("/dev/rtc0", O_RDONLY|O_CLOEXEC);
5120 if (fd < 0)
5121 return -errno;
2076cf88 5122
7948c4df
KS		 5123 if (ioctl(fd, RTC_SET_TIME, tm) < 0)
5124 err = -errno;
2076cf88
LP		 5125
5126 close_nointr_nofail(fd);
7948c4df
KS		 5127
5128 return err;
5129}
f41607a6 5130
34ca941c
LP		 5131int copy_file(const char *from, const char *to) {
5132 int r, fdf, fdt;
5133
5134 assert(from);
5135 assert(to);
5136
5137 fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY);
5138 if (fdf < 0)
5139 return -errno;
5140
5141 fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644);
5142 if (fdt < 0) {
5143 close_nointr_nofail(fdf);
5144 return -errno;
5145 }
5146
5147 for (;;) {
5148 char buf[PIPE_BUF];
5149 ssize_t n, k;
5150
5151 n = read(fdf, buf, sizeof(buf));
5152 if (n < 0) {
5153 r = -errno;
5154
5155 close_nointr_nofail(fdf);
5156 close_nointr(fdt);
5157 unlink(to);
5158
5159 return r;
5160 }
5161
5162 if (n == 0)
5163 break;
5164
5165 errno = 0;
5166 k = loop_write(fdt, buf, n, false);
5167 if (n != k) {
5168 r = k < 0 ? k : (errno ? -errno : -EIO);
5169
5170 close_nointr_nofail(fdf);
5171 close_nointr(fdt);
5172
5173 unlink(to);
5174 return r;
5175 }
5176 }
5177
5178 close_nointr_nofail(fdf);
5179 r = close_nointr(fdt);
5180
5181 if (r < 0) {
5182 unlink(to);
5183 return r;
5184 }
5185
5186 return 0;
5187}
5188
5189int symlink_or_copy(const char *from, const char *to) {
5190 char *pf = NULL, *pt = NULL;
5191 struct stat a, b;
5192 int r;
5193
5194 assert(from);
5195 assert(to);
5196
5197 if (parent_of_path(from, &pf) < 0 ||
5198 parent_of_path(to, &pt) < 0) {
5199 r = -ENOMEM;
5200 goto finish;
5201 }
5202
5203 if (stat(pf, &a) < 0 ||
5204 stat(pt, &b) < 0) {
5205 r = -errno;
5206 goto finish;
5207 }
5208
5209 if (a.st_dev != b.st_dev) {
5210 free(pf);
5211 free(pt);
5212
5213 return copy_file(from, to);
5214 }
5215
5216 if (symlink(from, to) < 0) {
5217 r = -errno;
5218 goto finish;
5219 }
5220
5221 r = 0;
5222
5223finish:
5224 free(pf);
5225 free(pt);
5226
5227 return r;
5228}
5229
5230int symlink_or_copy_atomic(const char *from, const char *to) {
5231 char *t, *x;
5232 const char *fn;
5233 size_t k;
5234 unsigned long long ull;
5235 unsigned i;
5236 int r;
5237
5238 assert(from);
5239 assert(to);
5240
5241 t = new(char, strlen(to) + 1 + 16 + 1);
5242 if (!t)
5243 return -ENOMEM;
5244
5245 fn = file_name_from_path(to);
5246 k = fn-to;
5247 memcpy(t, to, k);
5248 t[k] = '.';
5249 x = stpcpy(t+k+1, fn);
5250
5251 ull = random_ull();
5252 for (i = 0; i < 16; i++) {
5253 *(x++) = hexchar(ull & 0xF);
5254 ull >>= 4;
5255 }
5256
5257 *x = 0;
5258
5259 r = symlink_or_copy(from, t);
5260 if (r < 0) {
5261 unlink(t);
5262 free(t);
5263 return r;
5264 }
5265
5266 if (rename(t, to) < 0) {
5267 r = -errno;
5268 unlink(t);
5269 free(t);
5270 return r;
5271 }
5272
5273 free(t);
5274 return r;
5275}
5276
98a28fef 5277int audit_session_from_pid(pid_t pid, uint32_t *id) {
87d2c1ff 5278 char *s;
98a28fef
LP		 5279 uint32_t u;
5280 int r;
5281
98a28fef
LP		 5282 assert(id);
5283
5284 if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0)
5285 return -ENOENT;
5286
87d2c1ff
LP		 5287 if (pid == 0)
5288 r = read_one_line_file("/proc/self/sessionid", &s);
5289 else {
5290 char *p;
5291
5292 if (asprintf(&p, "/proc/%lu/sessionid", (unsigned long) pid) < 0)
5293 return -ENOMEM;
5294
5295 r = read_one_line_file(p, &s);
5296 free(p);
5297 }
98a28fef 5298
98a28fef
LP		 5299 if (r < 0)
5300 return r;
5301
5302 r = safe_atou32(s, &u);
5303 free(s);
5304
5305 if (r < 0)
5306 return r;
5307
5308 if (u == (uint32_t) -1 || u <= 0)
5309 return -ENOENT;
5310
5311 *id = u;
5312 return 0;
5313}
5314
87d2c1ff
LP		 5315int audit_loginuid_from_pid(pid_t pid, uid_t *uid) {
5316 char *s;
5317 uid_t u;
5318 int r;
5319
5320 assert(uid);
5321
5322 /* Only use audit login uid if we are executed with sufficient
5323 * capabilities so that pam_loginuid could do its job. If we
5324 * are lacking the CAP_AUDIT_CONTROL capabality we most likely
5325 * are being run in a container and /proc/self/loginuid is
5326 * useless since it probably contains a uid of the host
5327 * system. */
5328
5329 if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0)
5330 return -ENOENT;
5331
5332 if (pid == 0)
5333 r = read_one_line_file("/proc/self/loginuid", &s);
5334 else {
5335 char *p;
5336
5337 if (asprintf(&p, "/proc/%lu/loginuid", (unsigned long) pid) < 0)
5338 return -ENOMEM;
5339
5340 r = read_one_line_file(p, &s);
5341 free(p);
5342 }
5343
5344 if (r < 0)
5345 return r;
5346
5347 r = parse_uid(s, &u);
5348 free(s);
5349
5350 if (r < 0)
5351 return r;
5352
5353 if (u == (uid_t) -1)
5354 return -ENOENT;
5355
5356 *uid = (uid_t) u;
5357 return 0;
5358}
5359
4d6d6518
LP		 5360bool display_is_local(const char *display) {
5361 assert(display);
5362
5363 return
5364 display[0] == ':' &&
5365 display[1] >= '0' &&
5366 display[1] <= '9';
5367}
5368
5369int socket_from_display(const char *display, char **path) {
5370 size_t k;
5371 char *f, *c;
5372
5373 assert(display);
5374 assert(path);
5375
5376 if (!display_is_local(display))
5377 return -EINVAL;
5378
5379 k = strspn(display+1, "0123456789");
5380
5381 f = new(char, sizeof("/tmp/.X11-unix/X") + k);
5382 if (!f)
5383 return -ENOMEM;
5384
5385 c = stpcpy(f, "/tmp/.X11-unix/X");
5386 memcpy(c, display+1, k);
5387 c[k] = 0;
5388
5389 *path = f;
5390
5391 return 0;
5392}
5393
1cccf435
MV		 5394int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home) {
5395 struct passwd *p;
ddd88763 5396 uid_t u;
1cccf435
MV		 5397
5398 assert(username);
5399 assert(*username);
1cccf435
MV		 5400
5401 /* We enforce some special rules for uid=0: in order to avoid
5402 * NSS lookups for root we hardcode its data. */
5403
5404 if (streq(*username, "root") || streq(*username, "0")) {
5405 *username = "root";
4b67834e
LP		 5406
5407 if (uid)
5408 *uid = 0;
5409
5410 if (gid)
5411 *gid = 0;
5412
5413 if (home)
5414 *home = "/root";
1cccf435
MV		 5415 return 0;
5416 }
5417
ddd88763 5418 if (parse_uid(*username, &u) >= 0) {
1cccf435 5419 errno = 0;
ddd88763 5420 p = getpwuid(u);
1cccf435
MV		 5421
5422 /* If there are multiple users with the same id, make
5423 * sure to leave $USER to the configured value instead
5424 * of the first occurrence in the database. However if
5425 * the uid was configured by a numeric uid, then let's
5426 * pick the real username from /etc/passwd. */
5427 if (p)
5428 *username = p->pw_name;
5429 } else {
5430 errno = 0;
5431 p = getpwnam(*username);
5432 }
5433
5434 if (!p)
5435 return errno != 0 ? -errno : -ESRCH;
5436
4b67834e
LP		 5437 if (uid)
5438 *uid = p->pw_uid;
5439
5440 if (gid)
5441 *gid = p->pw_gid;
5442
5443 if (home)
5444 *home = p->pw_dir;
5445
5446 return 0;
5447}
5448
5449int get_group_creds(const char **groupname, gid_t *gid) {
5450 struct group *g;
5451 gid_t id;
5452
5453 assert(groupname);
5454
5455 /* We enforce some special rules for gid=0: in order to avoid
5456 * NSS lookups for root we hardcode its data. */
5457
5458 if (streq(*groupname, "root") || streq(*groupname, "0")) {
5459 *groupname = "root";
5460
5461 if (gid)
5462 *gid = 0;
5463
5464 return 0;
5465 }
5466
5467 if (parse_gid(*groupname, &id) >= 0) {
5468 errno = 0;
5469 g = getgrgid(id);
5470
5471 if (g)
5472 *groupname = g->gr_name;
5473 } else {
5474 errno = 0;
5475 g = getgrnam(*groupname);
5476 }
5477
5478 if (!g)
5479 return errno != 0 ? -errno : -ESRCH;
5480
5481 if (gid)
5482 *gid = g->gr_gid;
5483
1cccf435
MV		 5484 return 0;
5485}
5486
8092a428
LP		 5487int glob_exists(const char *path) {
5488 glob_t g;
5489 int r, k;
5490
5491 assert(path);
5492
5493 zero(g);
5494 errno = 0;
5495 k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g);
5496
5497 if (k == GLOB_NOMATCH)
5498 r = 0;
5499 else if (k == GLOB_NOSPACE)
5500 r = -ENOMEM;
5501 else if (k == 0)
5502 r = !strv_isempty(g.gl_pathv);
5503 else
5504 r = errno ? -errno : -EIO;
5505
5506 globfree(&g);
5507
5508 return r;
5509}
5510
83096483
LP		 5511int dirent_ensure_type(DIR *d, struct dirent *de) {
5512 struct stat st;
5513
5514 assert(d);
5515 assert(de);
5516
5517 if (de->d_type != DT_UNKNOWN)
5518 return 0;
5519
5520 if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
5521 return -errno;
5522
5523 de->d_type =
5524 S_ISREG(st.st_mode) ? DT_REG :
5525 S_ISDIR(st.st_mode) ? DT_DIR :
5526 S_ISLNK(st.st_mode) ? DT_LNK :
5527 S_ISFIFO(st.st_mode) ? DT_FIFO :
5528 S_ISSOCK(st.st_mode) ? DT_SOCK :
5529 S_ISCHR(st.st_mode) ? DT_CHR :
5530 S_ISBLK(st.st_mode) ? DT_BLK :
5531 DT_UNKNOWN;
5532
5533 return 0;
5534}
5535
5536int in_search_path(const char *path, char **search) {
5537 char **i, *parent;
5538 int r;
5539
5540 r = parent_of_path(path, &parent);
5541 if (r < 0)
5542 return r;
5543
5544 r = 0;
5545
5546 STRV_FOREACH(i, search) {
5547 if (path_equal(parent, *i)) {
5548 r = 1;
5549 break;
5550 }
5551 }
5552
5553 free(parent);
5554
5555 return r;
5556}
5557
034a2a52
LP		 5558int get_files_in_directory(const char *path, char ***list) {
5559 DIR *d;
5560 int r = 0;
5561 unsigned n = 0;
5562 char **l = NULL;
5563
5564 assert(path);
d60ef526
LP		 5565
5566 /* Returns all files in a directory in *list, and the number
5567 * of files as return value. If list is NULL returns only the
5568 * number */
034a2a52
LP		 5569
5570 d = opendir(path);
8ea913b2
LP		 5571 if (!d)
5572 return -errno;
5573
034a2a52
LP		 5574 for (;;) {
5575 struct dirent buffer, *de;
5576 int k;
5577
5578 k = readdir_r(d, &buffer, &de);
5579 if (k != 0) {
5580 r = -k;
5581 goto finish;
5582 }
5583
5584 if (!de)
5585 break;
5586
5587 dirent_ensure_type(d, de);
5588
5589 if (!dirent_is_file(de))
5590 continue;
5591
d60ef526
LP		 5592 if (list) {
5593 if ((unsigned) r >= n) {
5594 char **t;
034a2a52 5595
d60ef526
LP		 5596 n = MAX(16, 2*r);
5597 t = realloc(l, sizeof(char*) * n);
5598 if (!t) {
5599 r = -ENOMEM;
5600 goto finish;
5601 }
034a2a52 5602
d60ef526
LP		 5603 l = t;
5604 }
034a2a52 5605
d60ef526 5606 assert((unsigned) r < n);
034a2a52 5607
d60ef526
LP		 5608 l[r] = strdup(de->d_name);
5609 if (!l[r]) {
5610 r = -ENOMEM;
5611 goto finish;
5612 }
034a2a52 5613
d60ef526
LP		 5614 l[++r] = NULL;
5615 } else
5616 r++;
034a2a52
LP		 5617 }
5618
5619finish:
5620 if (d)
5621 closedir(d);
5622
d60ef526
LP		 5623 if (r >= 0) {
5624 if (list)
5625 *list = l;
5626 } else
034a2a52
LP		 5627 strv_free(l);
5628
5629 return r;
5630}
5631
911a4828
LP		 5632char *join(const char *x, ...) {
5633 va_list ap;
5634 size_t l;
5635 char *r, *p;
5636
5637 va_start(ap, x);
5638
5639 if (x) {
5640 l = strlen(x);
5641
5642 for (;;) {
5643 const char *t;
5644
5645 t = va_arg(ap, const char *);
5646 if (!t)
5647 break;
5648
5649 l += strlen(t);
5650 }
5651 } else
5652 l = 0;
5653
5654 va_end(ap);
5655
5656 r = new(char, l+1);
5657 if (!r)
5658 return NULL;
5659
5660 if (x) {
5661 p = stpcpy(r, x);
5662
5663 va_start(ap, x);
5664
5665 for (;;) {
5666 const char *t;
5667
5668 t = va_arg(ap, const char *);
5669 if (!t)
5670 break;
5671
5672 p = stpcpy(p, t);
5673 }
8ea913b2
LP		 5674
5675 va_end(ap);
911a4828
LP		 5676 } else
5677 r[0] = 0;
5678
5679 return r;
5680}
5681
b636465b
LP		 5682bool is_main_thread(void) {
5683 static __thread int cached = 0;
5684
5685 if (_unlikely_(cached == 0))
5686 cached = getpid() == gettid() ? 1 : -1;
5687
5688 return cached > 0;
5689}
5690
94959f0f
LP		 5691int block_get_whole_disk(dev_t d, dev_t *ret) {
5692 char *p, *s;
5693 int r;
5694 unsigned n, m;
5695
5696 assert(ret);
5697
5698 /* If it has a queue this is good enough for us */
5699 if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0)
5700 return -ENOMEM;
5701
5702 r = access(p, F_OK);
5703 free(p);
5704
5705 if (r >= 0) {
5706 *ret = d;
5707 return 0;
5708 }
5709
5710 /* If it is a partition find the originating device */
5711 if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0)
5712 return -ENOMEM;
5713
5714 r = access(p, F_OK);
5715 free(p);
5716
5717 if (r < 0)
5718 return -ENOENT;
5719
5720 /* Get parent dev_t */
5721 if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0)
5722 return -ENOMEM;
5723
5724 r = read_one_line_file(p, &s);
5725 free(p);
5726
5727 if (r < 0)
5728 return r;
5729
5730 r = sscanf(s, "%u:%u", &m, &n);
5731 free(s);
5732
5733 if (r != 2)
5734 return -EINVAL;
5735
5736 /* Only return this if it is really good enough for us. */
5737 if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0)
5738 return -ENOMEM;
5739
5740 r = access(p, F_OK);
5741 free(p);
5742
5743 if (r >= 0) {
5744 *ret = makedev(m, n);
5745 return 0;
5746 }
5747
5748 return -ENOENT;
5749}
5750
ad293f5a
LP		 5751int file_is_sticky(const char *p) {
5752 struct stat st;
5753
5754 assert(p);
5755
5756 if (lstat(p, &st) < 0)
5757 return -errno;
5758
5759 return
5760 st.st_uid == 0 &&
5761 (st.st_mode & S_ISVTX);
5762}
94959f0f 5763
f41607a6
LP		 5764static const char *const ioprio_class_table[] = {
5765 [IOPRIO_CLASS_NONE] = "none",
5766 [IOPRIO_CLASS_RT] = "realtime",
5767 [IOPRIO_CLASS_BE] = "best-effort",
5768 [IOPRIO_CLASS_IDLE] = "idle"
5769};
5770
5771DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int);
5772
5773static const char *const sigchld_code_table[] = {
5774 [CLD_EXITED] = "exited",
5775 [CLD_KILLED] = "killed",
5776 [CLD_DUMPED] = "dumped",
5777 [CLD_TRAPPED] = "trapped",
5778 [CLD_STOPPED] = "stopped",
5779 [CLD_CONTINUED] = "continued",
5780};
5781
5782DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
5783
5784static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = {
5785 [LOG_FAC(LOG_KERN)] = "kern",
5786 [LOG_FAC(LOG_USER)] = "user",
5787 [LOG_FAC(LOG_MAIL)] = "mail",
5788 [LOG_FAC(LOG_DAEMON)] = "daemon",
5789 [LOG_FAC(LOG_AUTH)] = "auth",
5790 [LOG_FAC(LOG_SYSLOG)] = "syslog",
5791 [LOG_FAC(LOG_LPR)] = "lpr",
5792 [LOG_FAC(LOG_NEWS)] = "news",
5793 [LOG_FAC(LOG_UUCP)] = "uucp",
5794 [LOG_FAC(LOG_CRON)] = "cron",
5795 [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
5796 [LOG_FAC(LOG_FTP)] = "ftp",
5797 [LOG_FAC(LOG_LOCAL0)] = "local0",
5798 [LOG_FAC(LOG_LOCAL1)] = "local1",
5799 [LOG_FAC(LOG_LOCAL2)] = "local2",
5800 [LOG_FAC(LOG_LOCAL3)] = "local3",
5801 [LOG_FAC(LOG_LOCAL4)] = "local4",
5802 [LOG_FAC(LOG_LOCAL5)] = "local5",
5803 [LOG_FAC(LOG_LOCAL6)] = "local6",
5804 [LOG_FAC(LOG_LOCAL7)] = "local7"
5805};
5806
5807DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int);
5808
5809static const char *const log_level_table[] = {
5810 [LOG_EMERG] = "emerg",
5811 [LOG_ALERT] = "alert",
5812 [LOG_CRIT] = "crit",
5813 [LOG_ERR] = "err",
5814 [LOG_WARNING] = "warning",
5815 [LOG_NOTICE] = "notice",
5816 [LOG_INFO] = "info",
5817 [LOG_DEBUG] = "debug"
5818};
5819
5820DEFINE_STRING_TABLE_LOOKUP(log_level, int);
5821
5822static const char* const sched_policy_table[] = {
5823 [SCHED_OTHER] = "other",
5824 [SCHED_BATCH] = "batch",
5825 [SCHED_IDLE] = "idle",
5826 [SCHED_FIFO] = "fifo",
5827 [SCHED_RR] = "rr"
5828};
5829
5830DEFINE_STRING_TABLE_LOOKUP(sched_policy, int);
5831
5832static const char* const rlimit_table[] = {
5833 [RLIMIT_CPU] = "LimitCPU",
5834 [RLIMIT_FSIZE] = "LimitFSIZE",
5835 [RLIMIT_DATA] = "LimitDATA",
5836 [RLIMIT_STACK] = "LimitSTACK",
5837 [RLIMIT_CORE] = "LimitCORE",
5838 [RLIMIT_RSS] = "LimitRSS",
5839 [RLIMIT_NOFILE] = "LimitNOFILE",
5840 [RLIMIT_AS] = "LimitAS",
5841 [RLIMIT_NPROC] = "LimitNPROC",
5842 [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
5843 [RLIMIT_LOCKS] = "LimitLOCKS",
5844 [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
5845 [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
5846 [RLIMIT_NICE] = "LimitNICE",
5847 [RLIMIT_RTPRIO] = "LimitRTPRIO",
5848 [RLIMIT_RTTIME] = "LimitRTTIME"
5849};
5850
5851DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
5852
5853static const char* const ip_tos_table[] = {
5854 [IPTOS_LOWDELAY] = "low-delay",
5855 [IPTOS_THROUGHPUT] = "throughput",
5856 [IPTOS_RELIABILITY] = "reliability",
5857 [IPTOS_LOWCOST] = "low-cost",
5858};
5859
5860DEFINE_STRING_TABLE_LOOKUP(ip_tos, int);
5861
4e240ab0 5862static const char *const __signal_table[] = {
f41607a6
LP		 5863 [SIGHUP] = "HUP",
5864 [SIGINT] = "INT",
5865 [SIGQUIT] = "QUIT",
5866 [SIGILL] = "ILL",
5867 [SIGTRAP] = "TRAP",
5868 [SIGABRT] = "ABRT",
5869 [SIGBUS] = "BUS",
5870 [SIGFPE] = "FPE",
5871 [SIGKILL] = "KILL",
5872 [SIGUSR1] = "USR1",
5873 [SIGSEGV] = "SEGV",
5874 [SIGUSR2] = "USR2",
5875 [SIGPIPE] = "PIPE",
5876 [SIGALRM] = "ALRM",
5877 [SIGTERM] = "TERM",
5878#ifdef SIGSTKFLT
5879 [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */
5880#endif
5881 [SIGCHLD] = "CHLD",
5882 [SIGCONT] = "CONT",
5883 [SIGSTOP] = "STOP",
5884 [SIGTSTP] = "TSTP",
5885 [SIGTTIN] = "TTIN",
5886 [SIGTTOU] = "TTOU",
5887 [SIGURG] = "URG",
5888 [SIGXCPU] = "XCPU",
5889 [SIGXFSZ] = "XFSZ",
5890 [SIGVTALRM] = "VTALRM",
5891 [SIGPROF] = "PROF",
5892 [SIGWINCH] = "WINCH",
5893 [SIGIO] = "IO",
5894 [SIGPWR] = "PWR",
5895 [SIGSYS] = "SYS"
5896};
5897
4e240ab0
MS		 5898DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int);
5899
5900const char *signal_to_string(int signo) {
5901 static __thread char buf[12];
5902 const char *name;
5903
5904 name = __signal_to_string(signo);
5905 if (name)
5906 return name;
5907
5908 if (signo >= SIGRTMIN && signo <= SIGRTMAX)
5909 snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN);
5910 else
5911 snprintf(buf, sizeof(buf) - 1, "%d", signo);
5912 char_array_0(buf);
5913 return buf;
5914}
5915
5916int signal_from_string(const char *s) {
5917 int signo;
5918 int offset = 0;
5919 unsigned u;
5920
5921 signo =__signal_from_string(s);
5922 if (signo > 0)
5923 return signo;
5924
5925 if (startswith(s, "RTMIN+")) {
5926 s += 6;
5927 offset = SIGRTMIN;
5928 }
5929 if (safe_atou(s, &u) >= 0) {
5930 signo = (int) u + offset;
5931 if (signo > 0 && signo < _NSIG)
5932 return signo;
5933 }
5934 return -1;
5935}
65457142
FC		 5936
5937bool kexec_loaded(void) {
5938 bool loaded = false;
5939 char *s;
5940
5941 if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) {
5942 if (s[0] == '1')
5943 loaded = true;
5944 free(s);
5945 }
5946 return loaded;
5947}
fb9de93d
LP		 5948
5949int strdup_or_null(const char *a, char **b) {
5950 char *c;
5951
5952 assert(b);
5953
5954 if (!a) {
5955 *b = NULL;
5956 return 0;
5957 }
5958
5959 c = strdup(a);
5960 if (!c)
5961 return -ENOMEM;
5962
5963 *b = c;
5964 return 0;
5965}
64685e0c 5966
87d2c1ff
LP		 5967int prot_from_flags(int flags) {
5968
5969 switch (flags & O_ACCMODE) {
5970
5971 case O_RDONLY:
5972 return PROT_READ;
5973
5974 case O_WRONLY:
5975 return PROT_WRITE;
5976
5977 case O_RDWR:
5978 return PROT_READ|PROT_WRITE;
5979
5980 default:
5981 return -EINVAL;
5982 }
7c99e0c1 5983}
689b9a22 5984
64685e0c
LP		 5985unsigned long cap_last_cap(void) {
5986 static __thread unsigned long saved;
5987 static __thread bool valid = false;
5988 unsigned long p;
5989
5990 if (valid)
5991 return saved;
5992
5993 p = (unsigned long) CAP_LAST_CAP;
5994
5995 if (prctl(PR_CAPBSET_READ, p) < 0) {
5996
5997 /* Hmm, look downwards, until we find one that
5998 * works */
5999 for (p--; p > 0; p --)
6000 if (prctl(PR_CAPBSET_READ, p) >= 0)
6001 break;
6002
6003 } else {
6004
6005 /* Hmm, look upwards, until we find one that doesn't
6006 * work */
6007 for (;; p++)
6008 if (prctl(PR_CAPBSET_READ, p+1) < 0)
6009 break;
6010 }
6011
6012 saved = p;
6013 valid = true;
6014
6015 return p;
6016}
babfc091
LP		 6017
6018char *format_bytes(char *buf, size_t l, off_t t) {
c0f99c21 6019 unsigned i;
babfc091
LP		 6020
6021 static const struct {
6022 const char *suffix;
6023 off_t factor;
6024 } table[] = {
6025 { "T", 1024ULL*1024ULL*1024ULL*1024ULL },
6026 { "G", 1024ULL*1024ULL*1024ULL },
6027 { "M", 1024ULL*1024ULL },
6028 { "K", 1024ULL },
6029 };
6030
6031 for (i = 0; i < ELEMENTSOF(table); i++) {
6032
6033 if (t >= table[i].factor) {
6034 snprintf(buf, l,
6035 "%llu.%llu%s",
6036 (unsigned long long) (t / table[i].factor),
6037 (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL),
6038 table[i].suffix);
6039
6040 goto finish;
6041 }
6042 }
6043
6044 snprintf(buf, l, "%lluB", (unsigned long long) t);
6045
6046finish:
6047 buf[l-1] = 0;
6048 return buf;
6049
6050}
55d7bfc1
LP		 6051
6052void* memdup(const void *p, size_t l) {
6053 void *r;
6054
6055 assert(p);
6056
6057 r = malloc(l);
6058 if (!r)
6059 return NULL;
6060
6061 memcpy(r, p, l);
6062 return r;
6063}
Unnamed repository; edit this file 'description' to name the repository.