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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 | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
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> |
7948c4df | 53 | #include <sys/time.h> |
8092a428 | 54 | #include <glob.h> |
4b67834e | 55 | #include <grp.h> |
87d2c1ff | 56 | #include <sys/mman.h> |
825c6fe5 LP |
57 | #include <sys/vfs.h> |
58 | #include <linux/magic.h> | |
0b507b17 | 59 | #include <limits.h> |
09017585 MS |
60 | #include <langinfo.h> |
61 | #include <locale.h> | |
60918275 LP |
62 | |
63 | #include "macro.h" | |
64 | #include "util.h" | |
1dccbe19 LP |
65 | #include "ioprio.h" |
66 | #include "missing.h" | |
a9f5d454 | 67 | #include "log.h" |
65d2ebdc | 68 | #include "strv.h" |
e51bc1a2 | 69 | #include "label.h" |
9eb977db | 70 | #include "path-util.h" |
d06dacd0 | 71 | #include "exit-status.h" |
83cc030f | 72 | #include "hashmap.h" |
4d1a6904 | 73 | #include "env-util.h" |
a5c32cff | 74 | #include "fileio.h" |
56cf987f | 75 | |
9a0e6896 LP |
76 | int saved_argc = 0; |
77 | char **saved_argv = NULL; | |
9086e840 | 78 | |
28917d7d | 79 | static volatile unsigned cached_columns = 0; |
ed757c0c | 80 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 81 | |
37f85e66 | 82 | size_t page_size(void) { |
83 | static __thread size_t pgsz = 0; | |
84 | long r; | |
85 | ||
87d2c1ff | 86 | if (_likely_(pgsz > 0)) |
37f85e66 | 87 | return pgsz; |
88 | ||
e67f47e5 LP |
89 | r = sysconf(_SC_PAGESIZE); |
90 | assert(r > 0); | |
37f85e66 | 91 | |
92 | pgsz = (size_t) r; | |
37f85e66 | 93 | return pgsz; |
94 | } | |
95 | ||
e05797fb LP |
96 | bool streq_ptr(const char *a, const char *b) { |
97 | ||
98 | /* Like streq(), but tries to make sense of NULL pointers */ | |
99 | ||
100 | if (a && b) | |
101 | return streq(a, b); | |
102 | ||
103 | if (!a && !b) | |
104 | return true; | |
105 | ||
106 | return false; | |
107 | } | |
108 | ||
8c7c140f | 109 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
110 | size_t sl, pl; |
111 | ||
112 | assert(s); | |
113 | assert(postfix); | |
114 | ||
115 | sl = strlen(s); | |
116 | pl = strlen(postfix); | |
117 | ||
d4d0d4db | 118 | if (pl == 0) |
8c7c140f | 119 | return (char*) s + sl; |
d4d0d4db | 120 | |
60918275 | 121 | if (sl < pl) |
8c7c140f LP |
122 | return NULL; |
123 | ||
124 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
125 | return NULL; | |
60918275 | 126 | |
8c7c140f | 127 | return (char*) s + sl - pl; |
60918275 LP |
128 | } |
129 | ||
e8988fc2 LP |
130 | char* startswith(const char *s, const char *prefix) { |
131 | const char *a, *b; | |
60918275 LP |
132 | |
133 | assert(s); | |
134 | assert(prefix); | |
135 | ||
e8988fc2 LP |
136 | a = s, b = prefix; |
137 | for (;;) { | |
138 | if (*b == 0) | |
139 | return (char*) a; | |
140 | if (*a != *b) | |
141 | return NULL; | |
60918275 | 142 | |
e8988fc2 LP |
143 | a++, b++; |
144 | } | |
60918275 LP |
145 | } |
146 | ||
e8988fc2 LP |
147 | char* startswith_no_case(const char *s, const char *prefix) { |
148 | const char *a, *b; | |
3177a7fa MAP |
149 | |
150 | assert(s); | |
151 | assert(prefix); | |
152 | ||
e8988fc2 LP |
153 | a = s, b = prefix; |
154 | for (;;) { | |
155 | if (*b == 0) | |
156 | return (char*) a; | |
157 | if (tolower(*a) != tolower(*b)) | |
158 | return NULL; | |
3177a7fa | 159 | |
e8988fc2 LP |
160 | a++, b++; |
161 | } | |
3177a7fa MAP |
162 | } |
163 | ||
79d6d816 LP |
164 | bool first_word(const char *s, const char *word) { |
165 | size_t sl, wl; | |
166 | ||
167 | assert(s); | |
168 | assert(word); | |
169 | ||
170 | sl = strlen(s); | |
171 | wl = strlen(word); | |
172 | ||
173 | if (sl < wl) | |
174 | return false; | |
175 | ||
d4d0d4db LP |
176 | if (wl == 0) |
177 | return true; | |
178 | ||
79d6d816 LP |
179 | if (memcmp(s, word, wl) != 0) |
180 | return false; | |
181 | ||
d4d0d4db LP |
182 | return s[wl] == 0 || |
183 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
184 | } |
185 | ||
42f4e3c4 | 186 | int close_nointr(int fd) { |
b0ee8068 | 187 | int r; |
60918275 | 188 | |
b0ee8068 CW |
189 | assert(fd >= 0); |
190 | r = close(fd); | |
191 | ||
192 | /* Just ignore EINTR; a retry loop is the wrong | |
193 | * thing to do on Linux. | |
194 | * | |
195 | * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html | |
196 | * https://bugzilla.gnome.org/show_bug.cgi?id=682819 | |
197 | * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR | |
198 | * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain | |
199 | */ | |
200 | if (_unlikely_(r < 0 && errno == EINTR)) | |
201 | return 0; | |
202 | else if (r >= 0) | |
203 | return r; | |
204 | else | |
205 | return -errno; | |
60918275 | 206 | } |
85261803 | 207 | |
85f136b5 | 208 | void close_nointr_nofail(int fd) { |
80876c20 | 209 | int saved_errno = errno; |
85f136b5 LP |
210 | |
211 | /* like close_nointr() but cannot fail, and guarantees errno | |
212 | * is unchanged */ | |
213 | ||
214 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
215 | |
216 | errno = saved_errno; | |
85f136b5 LP |
217 | } |
218 | ||
5b6319dc LP |
219 | void close_many(const int fds[], unsigned n_fd) { |
220 | unsigned i; | |
221 | ||
222 | for (i = 0; i < n_fd; i++) | |
223 | close_nointr_nofail(fds[i]); | |
224 | } | |
225 | ||
85261803 LP |
226 | int parse_boolean(const char *v) { |
227 | assert(v); | |
228 | ||
b43d1d01 | 229 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || strcaseeq(v, "on")) |
85261803 | 230 | return 1; |
b43d1d01 | 231 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || strcaseeq(v, "off")) |
85261803 LP |
232 | return 0; |
233 | ||
234 | return -EINVAL; | |
235 | } | |
236 | ||
3ba686c1 | 237 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 238 | unsigned long ul = 0; |
3ba686c1 LP |
239 | pid_t pid; |
240 | int r; | |
241 | ||
242 | assert(s); | |
243 | assert(ret_pid); | |
244 | ||
e67f47e5 LP |
245 | r = safe_atolu(s, &ul); |
246 | if (r < 0) | |
3ba686c1 LP |
247 | return r; |
248 | ||
249 | pid = (pid_t) ul; | |
250 | ||
251 | if ((unsigned long) pid != ul) | |
252 | return -ERANGE; | |
253 | ||
254 | if (pid <= 0) | |
255 | return -ERANGE; | |
256 | ||
257 | *ret_pid = pid; | |
258 | return 0; | |
259 | } | |
260 | ||
034a2a52 LP |
261 | int parse_uid(const char *s, uid_t* ret_uid) { |
262 | unsigned long ul = 0; | |
263 | uid_t uid; | |
264 | int r; | |
265 | ||
266 | assert(s); | |
267 | assert(ret_uid); | |
268 | ||
e67f47e5 LP |
269 | r = safe_atolu(s, &ul); |
270 | if (r < 0) | |
034a2a52 LP |
271 | return r; |
272 | ||
273 | uid = (uid_t) ul; | |
274 | ||
275 | if ((unsigned long) uid != ul) | |
276 | return -ERANGE; | |
277 | ||
278 | *ret_uid = uid; | |
279 | return 0; | |
280 | } | |
281 | ||
85261803 LP |
282 | int safe_atou(const char *s, unsigned *ret_u) { |
283 | char *x = NULL; | |
034c6ed7 | 284 | unsigned long l; |
85261803 LP |
285 | |
286 | assert(s); | |
287 | assert(ret_u); | |
288 | ||
289 | errno = 0; | |
290 | l = strtoul(s, &x, 0); | |
291 | ||
f3910003 | 292 | if (!x || x == s || *x || errno) |
85261803 LP |
293 | return errno ? -errno : -EINVAL; |
294 | ||
034c6ed7 | 295 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
296 | return -ERANGE; |
297 | ||
298 | *ret_u = (unsigned) l; | |
299 | return 0; | |
300 | } | |
301 | ||
302 | int safe_atoi(const char *s, int *ret_i) { | |
303 | char *x = NULL; | |
034c6ed7 | 304 | long l; |
85261803 LP |
305 | |
306 | assert(s); | |
307 | assert(ret_i); | |
308 | ||
309 | errno = 0; | |
310 | l = strtol(s, &x, 0); | |
311 | ||
f3910003 | 312 | if (!x || x == s || *x || errno) |
85261803 LP |
313 | return errno ? -errno : -EINVAL; |
314 | ||
034c6ed7 | 315 | if ((long) (int) l != l) |
85261803 LP |
316 | return -ERANGE; |
317 | ||
034c6ed7 LP |
318 | *ret_i = (int) l; |
319 | return 0; | |
320 | } | |
321 | ||
034c6ed7 LP |
322 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
323 | char *x = NULL; | |
324 | unsigned long long l; | |
325 | ||
326 | assert(s); | |
327 | assert(ret_llu); | |
328 | ||
329 | errno = 0; | |
330 | l = strtoull(s, &x, 0); | |
331 | ||
f3910003 | 332 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
333 | return errno ? -errno : -EINVAL; |
334 | ||
335 | *ret_llu = l; | |
336 | return 0; | |
337 | } | |
338 | ||
339 | int safe_atolli(const char *s, long long int *ret_lli) { | |
340 | char *x = NULL; | |
341 | long long l; | |
342 | ||
343 | assert(s); | |
344 | assert(ret_lli); | |
345 | ||
346 | errno = 0; | |
347 | l = strtoll(s, &x, 0); | |
348 | ||
f3910003 | 349 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
350 | return errno ? -errno : -EINVAL; |
351 | ||
352 | *ret_lli = l; | |
85261803 LP |
353 | return 0; |
354 | } | |
a41e8209 | 355 | |
f7900e25 TA |
356 | int safe_atod(const char *s, double *ret_d) { |
357 | char *x = NULL; | |
358 | double d; | |
359 | ||
360 | assert(s); | |
361 | assert(ret_d); | |
362 | ||
363 | errno = 0; | |
364 | d = strtod(s, &x); | |
365 | ||
366 | if (!x || x == s || *x || errno) | |
367 | return errno ? -errno : -EINVAL; | |
368 | ||
369 | *ret_d = (double) d; | |
370 | return 0; | |
371 | } | |
372 | ||
a41e8209 | 373 | /* Split a string into words. */ |
65d2ebdc | 374 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
375 | char *current; |
376 | ||
377 | current = *state ? *state : (char*) c; | |
378 | ||
379 | if (!*current || *c == 0) | |
380 | return NULL; | |
381 | ||
65d2ebdc LP |
382 | current += strspn(current, separator); |
383 | *l = strcspn(current, separator); | |
82919e3d LP |
384 | *state = current+*l; |
385 | ||
386 | return (char*) current; | |
387 | } | |
388 | ||
034c6ed7 LP |
389 | /* Split a string into words, but consider strings enclosed in '' and |
390 | * "" as words even if they include spaces. */ | |
391 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
392 | char *current, *e; |
393 | bool escaped = false; | |
034c6ed7 LP |
394 | |
395 | current = *state ? *state : (char*) c; | |
396 | ||
397 | if (!*current || *c == 0) | |
398 | return NULL; | |
399 | ||
400 | current += strspn(current, WHITESPACE); | |
401 | ||
402 | if (*current == '\'') { | |
403 | current ++; | |
034c6ed7 | 404 | |
0bab36f2 LP |
405 | for (e = current; *e; e++) { |
406 | if (escaped) | |
407 | escaped = false; | |
408 | else if (*e == '\\') | |
409 | escaped = true; | |
410 | else if (*e == '\'') | |
411 | break; | |
412 | } | |
413 | ||
414 | *l = e-current; | |
415 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
416 | } else if (*current == '\"') { |
417 | current ++; | |
034c6ed7 | 418 | |
0bab36f2 LP |
419 | for (e = current; *e; e++) { |
420 | if (escaped) | |
421 | escaped = false; | |
422 | else if (*e == '\\') | |
423 | escaped = true; | |
424 | else if (*e == '\"') | |
425 | break; | |
426 | } | |
427 | ||
428 | *l = e-current; | |
429 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 430 | } else { |
0bab36f2 LP |
431 | for (e = current; *e; e++) { |
432 | if (escaped) | |
433 | escaped = false; | |
434 | else if (*e == '\\') | |
435 | escaped = true; | |
436 | else if (strchr(WHITESPACE, *e)) | |
437 | break; | |
438 | } | |
439 | *l = e-current; | |
440 | *state = e; | |
034c6ed7 LP |
441 | } |
442 | ||
443 | return (char*) current; | |
444 | } | |
445 | ||
034c6ed7 LP |
446 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
447 | int r; | |
2fbe635a | 448 | _cleanup_fclose_ FILE *f = NULL; |
20c03b7b | 449 | char fn[PATH_MAX], line[LINE_MAX], *p; |
bb00e604 | 450 | long unsigned ppid; |
034c6ed7 | 451 | |
8480e784 | 452 | assert(pid > 0); |
034c6ed7 LP |
453 | assert(_ppid); |
454 | ||
bb00e604 | 455 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
8480e784 | 456 | char_array_0(fn); |
034c6ed7 | 457 | |
2fbe635a LP |
458 | f = fopen(fn, "re"); |
459 | if (!f) | |
034c6ed7 LP |
460 | return -errno; |
461 | ||
2fbe635a | 462 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 463 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
464 | return r; |
465 | } | |
466 | ||
034c6ed7 LP |
467 | /* Let's skip the pid and comm fields. The latter is enclosed |
468 | * in () but does not escape any () in its value, so let's | |
469 | * skip over it manually */ | |
470 | ||
2fbe635a LP |
471 | p = strrchr(line, ')'); |
472 | if (!p) | |
034c6ed7 LP |
473 | return -EIO; |
474 | ||
475 | p++; | |
476 | ||
477 | if (sscanf(p, " " | |
478 | "%*c " /* state */ | |
bb00e604 | 479 | "%lu ", /* ppid */ |
034c6ed7 LP |
480 | &ppid) != 1) |
481 | return -EIO; | |
482 | ||
bb00e604 | 483 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
484 | return -ERANGE; |
485 | ||
486 | *_ppid = (pid_t) ppid; | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
7640a5de | 491 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
e67f47e5 | 492 | _cleanup_fclose_ FILE *f = NULL; |
7640a5de LP |
493 | char fn[PATH_MAX], line[LINE_MAX], *p; |
494 | ||
495 | assert(pid > 0); | |
496 | assert(st); | |
497 | ||
498 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); | |
499 | char_array_0(fn); | |
500 | ||
e67f47e5 LP |
501 | f = fopen(fn, "re"); |
502 | if (!f) | |
7640a5de LP |
503 | return -errno; |
504 | ||
e67f47e5 LP |
505 | if (!fgets(line, sizeof(line), f)) { |
506 | if (ferror(f)) | |
507 | return -errno; | |
7640a5de | 508 | |
e67f47e5 LP |
509 | return -EIO; |
510 | } | |
7640a5de LP |
511 | |
512 | /* Let's skip the pid and comm fields. The latter is enclosed | |
513 | * in () but does not escape any () in its value, so let's | |
514 | * skip over it manually */ | |
515 | ||
e67f47e5 LP |
516 | p = strrchr(line, ')'); |
517 | if (!p) | |
7640a5de LP |
518 | return -EIO; |
519 | ||
520 | p++; | |
521 | ||
522 | if (sscanf(p, " " | |
523 | "%*c " /* state */ | |
524 | "%*d " /* ppid */ | |
525 | "%*d " /* pgrp */ | |
526 | "%*d " /* session */ | |
527 | "%*d " /* tty_nr */ | |
528 | "%*d " /* tpgid */ | |
529 | "%*u " /* flags */ | |
530 | "%*u " /* minflt */ | |
531 | "%*u " /* cminflt */ | |
532 | "%*u " /* majflt */ | |
533 | "%*u " /* cmajflt */ | |
534 | "%*u " /* utime */ | |
535 | "%*u " /* stime */ | |
536 | "%*d " /* cutime */ | |
537 | "%*d " /* cstime */ | |
538 | "%*d " /* priority */ | |
539 | "%*d " /* nice */ | |
540 | "%*d " /* num_threads */ | |
541 | "%*d " /* itrealvalue */ | |
542 | "%llu " /* starttime */, | |
543 | st) != 1) | |
544 | return -EIO; | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
34ca941c LP |
549 | int fchmod_umask(int fd, mode_t m) { |
550 | mode_t u; | |
551 | int r; | |
552 | ||
553 | u = umask(0777); | |
554 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
555 | umask(u); | |
556 | ||
557 | return r; | |
558 | } | |
559 | ||
7072ced8 LP |
560 | char *truncate_nl(char *s) { |
561 | assert(s); | |
562 | ||
563 | s[strcspn(s, NEWLINE)] = 0; | |
564 | return s; | |
565 | } | |
566 | ||
87d2c1ff | 567 | int get_process_comm(pid_t pid, char **name) { |
7072ced8 LP |
568 | int r; |
569 | ||
7072ced8 LP |
570 | assert(name); |
571 | ||
87d2c1ff LP |
572 | if (pid == 0) |
573 | r = read_one_line_file("/proc/self/comm", name); | |
574 | else { | |
575 | char *p; | |
576 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) | |
577 | return -ENOMEM; | |
7072ced8 | 578 | |
87d2c1ff LP |
579 | r = read_one_line_file(p, name); |
580 | free(p); | |
581 | } | |
7072ced8 | 582 | |
87d2c1ff | 583 | return r; |
7072ced8 LP |
584 | } |
585 | ||
87d2c1ff | 586 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
9bdbc2e2 | 587 | char *r = NULL, *k; |
c59760ee | 588 | int c; |
c59760ee LP |
589 | FILE *f; |
590 | ||
c59760ee LP |
591 | assert(line); |
592 | ||
87d2c1ff LP |
593 | if (pid == 0) |
594 | f = fopen("/proc/self/cmdline", "re"); | |
595 | else { | |
596 | char *p; | |
597 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
598 | return -ENOMEM; | |
c59760ee | 599 | |
87d2c1ff LP |
600 | f = fopen(p, "re"); |
601 | free(p); | |
602 | } | |
c59760ee LP |
603 | |
604 | if (!f) | |
605 | return -errno; | |
9bdbc2e2 LN |
606 | if (max_length == 0) { |
607 | size_t len = 1; | |
608 | while ((c = getc(f)) != EOF) { | |
609 | k = realloc(r, len+1); | |
610 | if (k == NULL) { | |
611 | free(r); | |
612 | fclose(f); | |
613 | return -ENOMEM; | |
614 | } | |
615 | r = k; | |
616 | r[len-1] = isprint(c) ? c : ' '; | |
617 | r[len] = 0; | |
618 | len++; | |
619 | } | |
620 | } else { | |
621 | bool space = false; | |
622 | size_t left; | |
623 | r = new(char, max_length); | |
624 | if (!r) { | |
625 | fclose(f); | |
626 | return -ENOMEM; | |
627 | } | |
c59760ee | 628 | |
9bdbc2e2 LN |
629 | k = r; |
630 | left = max_length; | |
631 | while ((c = getc(f)) != EOF) { | |
c59760ee | 632 | |
9bdbc2e2 LN |
633 | if (isprint(c)) { |
634 | if (space) { | |
635 | if (left <= 4) | |
636 | break; | |
637 | ||
638 | *(k++) = ' '; | |
639 | left--; | |
640 | space = false; | |
641 | } | |
c59760ee | 642 | |
c59760ee LP |
643 | if (left <= 4) |
644 | break; | |
645 | ||
9bdbc2e2 | 646 | *(k++) = (char) c; |
057fbb58 | 647 | left--; |
9bdbc2e2 LN |
648 | } else |
649 | space = true; | |
650 | } | |
c59760ee | 651 | |
9bdbc2e2 LN |
652 | if (left <= 4) { |
653 | size_t n = MIN(left-1, 3U); | |
654 | memcpy(k, "...", n); | |
655 | k[n] = 0; | |
656 | } else | |
657 | *k = 0; | |
c59760ee LP |
658 | } |
659 | ||
c59760ee LP |
660 | fclose(f); |
661 | ||
35d2e7ec | 662 | /* Kernel threads have no argv[] */ |
9bdbc2e2 | 663 | if (r == NULL || r[0] == 0) { |
35d2e7ec LP |
664 | char *t; |
665 | int h; | |
666 | ||
667 | free(r); | |
668 | ||
87d2c1ff LP |
669 | if (!comm_fallback) |
670 | return -ENOENT; | |
671 | ||
672 | h = get_process_comm(pid, &t); | |
673 | if (h < 0) | |
35d2e7ec LP |
674 | return h; |
675 | ||
b7def684 | 676 | r = strjoin("[", t, "]", NULL); |
35d2e7ec LP |
677 | free(t); |
678 | ||
87d2c1ff | 679 | if (!r) |
35d2e7ec LP |
680 | return -ENOMEM; |
681 | } | |
fa776d8e | 682 | |
c59760ee LP |
683 | *line = r; |
684 | return 0; | |
685 | } | |
686 | ||
1e5678d0 LP |
687 | int is_kernel_thread(pid_t pid) { |
688 | char *p; | |
689 | size_t count; | |
690 | char c; | |
691 | bool eof; | |
692 | FILE *f; | |
693 | ||
694 | if (pid == 0) | |
695 | return 0; | |
696 | ||
697 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
698 | return -ENOMEM; | |
699 | ||
700 | f = fopen(p, "re"); | |
701 | free(p); | |
702 | ||
703 | if (!f) | |
704 | return -errno; | |
705 | ||
706 | count = fread(&c, 1, 1, f); | |
707 | eof = feof(f); | |
708 | fclose(f); | |
709 | ||
710 | /* Kernel threads have an empty cmdline */ | |
711 | ||
712 | if (count <= 0) | |
713 | return eof ? 1 : -errno; | |
714 | ||
715 | return 0; | |
716 | } | |
717 | ||
87d2c1ff LP |
718 | int get_process_exe(pid_t pid, char **name) { |
719 | int r; | |
720 | ||
721 | assert(name); | |
722 | ||
723 | if (pid == 0) | |
724 | r = readlink_malloc("/proc/self/exe", name); | |
725 | else { | |
726 | char *p; | |
727 | if (asprintf(&p, "/proc/%lu/exe", (unsigned long) pid) < 0) | |
728 | return -ENOMEM; | |
729 | ||
730 | r = readlink_malloc(p, name); | |
731 | free(p); | |
732 | } | |
733 | ||
734 | return r; | |
735 | } | |
736 | ||
901c3d0d | 737 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
f74e605f LP |
738 | _cleanup_fclose_ FILE *f = NULL; |
739 | _cleanup_free_ char *p = NULL; | |
9db11a99 | 740 | char line[LINE_MAX]; |
7e4ab3c5 | 741 | |
f74e605f | 742 | assert(field); |
7e4ab3c5 LP |
743 | assert(uid); |
744 | ||
745 | if (pid == 0) | |
746 | return getuid(); | |
747 | ||
748 | if (asprintf(&p, "/proc/%lu/status", (unsigned long) pid) < 0) | |
749 | return -ENOMEM; | |
750 | ||
751 | f = fopen(p, "re"); | |
7e4ab3c5 LP |
752 | if (!f) |
753 | return -errno; | |
754 | ||
9db11a99 | 755 | FOREACH_LINE(line, f, return -errno) { |
f74e605f | 756 | char *l; |
7e4ab3c5 LP |
757 | |
758 | l = strstrip(line); | |
759 | ||
901c3d0d LP |
760 | if (startswith(l, field)) { |
761 | l += strlen(field); | |
7e4ab3c5 LP |
762 | l += strspn(l, WHITESPACE); |
763 | ||
764 | l[strcspn(l, WHITESPACE)] = 0; | |
765 | ||
f74e605f | 766 | return parse_uid(l, uid); |
7e4ab3c5 LP |
767 | } |
768 | } | |
769 | ||
f74e605f | 770 | return -EIO; |
7e4ab3c5 LP |
771 | } |
772 | ||
901c3d0d LP |
773 | int get_process_uid(pid_t pid, uid_t *uid) { |
774 | return get_process_id(pid, "Uid:", uid); | |
775 | } | |
776 | ||
777 | int get_process_gid(pid_t pid, gid_t *gid) { | |
778 | return get_process_id(pid, "Gid:", gid); | |
779 | } | |
780 | ||
fab56fc5 LP |
781 | char *strnappend(const char *s, const char *suffix, size_t b) { |
782 | size_t a; | |
44d8db9e LP |
783 | char *r; |
784 | ||
fab56fc5 LP |
785 | if (!s && !suffix) |
786 | return strdup(""); | |
787 | ||
788 | if (!s) | |
789 | return strndup(suffix, b); | |
790 | ||
791 | if (!suffix) | |
792 | return strdup(s); | |
793 | ||
44d8db9e LP |
794 | assert(s); |
795 | assert(suffix); | |
796 | ||
797 | a = strlen(s); | |
aa408e77 | 798 | if (b > ((size_t) -1) - a) |
040f18ea | 799 | return NULL; |
44d8db9e | 800 | |
040f18ea LP |
801 | r = new(char, a+b+1); |
802 | if (!r) | |
44d8db9e LP |
803 | return NULL; |
804 | ||
805 | memcpy(r, s, a); | |
806 | memcpy(r+a, suffix, b); | |
807 | r[a+b] = 0; | |
808 | ||
809 | return r; | |
810 | } | |
87f0e418 | 811 | |
fab56fc5 LP |
812 | char *strappend(const char *s, const char *suffix) { |
813 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
814 | } | |
815 | ||
87f0e418 LP |
816 | int readlink_malloc(const char *p, char **r) { |
817 | size_t l = 100; | |
818 | ||
819 | assert(p); | |
820 | assert(r); | |
821 | ||
822 | for (;;) { | |
823 | char *c; | |
824 | ssize_t n; | |
825 | ||
826 | if (!(c = new(char, l))) | |
827 | return -ENOMEM; | |
828 | ||
829 | if ((n = readlink(p, c, l-1)) < 0) { | |
830 | int ret = -errno; | |
831 | free(c); | |
832 | return ret; | |
833 | } | |
834 | ||
835 | if ((size_t) n < l-1) { | |
836 | c[n] = 0; | |
837 | *r = c; | |
838 | return 0; | |
839 | } | |
840 | ||
841 | free(c); | |
842 | l *= 2; | |
843 | } | |
844 | } | |
845 | ||
2c7108c4 LP |
846 | int readlink_and_make_absolute(const char *p, char **r) { |
847 | char *target, *k; | |
848 | int j; | |
849 | ||
850 | assert(p); | |
851 | assert(r); | |
852 | ||
853 | if ((j = readlink_malloc(p, &target)) < 0) | |
854 | return j; | |
855 | ||
856 | k = file_in_same_dir(p, target); | |
857 | free(target); | |
858 | ||
859 | if (!k) | |
860 | return -ENOMEM; | |
861 | ||
862 | *r = k; | |
863 | return 0; | |
864 | } | |
865 | ||
83096483 LP |
866 | int readlink_and_canonicalize(const char *p, char **r) { |
867 | char *t, *s; | |
868 | int j; | |
869 | ||
870 | assert(p); | |
871 | assert(r); | |
872 | ||
873 | j = readlink_and_make_absolute(p, &t); | |
874 | if (j < 0) | |
875 | return j; | |
876 | ||
877 | s = canonicalize_file_name(t); | |
878 | if (s) { | |
879 | free(t); | |
880 | *r = s; | |
881 | } else | |
882 | *r = t; | |
883 | ||
884 | path_kill_slashes(*r); | |
885 | ||
886 | return 0; | |
887 | } | |
888 | ||
2a987ee8 LP |
889 | int reset_all_signal_handlers(void) { |
890 | int sig; | |
891 | ||
892 | for (sig = 1; sig < _NSIG; sig++) { | |
893 | struct sigaction sa; | |
894 | ||
895 | if (sig == SIGKILL || sig == SIGSTOP) | |
896 | continue; | |
897 | ||
898 | zero(sa); | |
899 | sa.sa_handler = SIG_DFL; | |
431c32bf | 900 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
901 | |
902 | /* On Linux the first two RT signals are reserved by | |
903 | * glibc, and sigaction() will return EINVAL for them. */ | |
904 | if ((sigaction(sig, &sa, NULL) < 0)) | |
905 | if (errno != EINVAL) | |
906 | return -errno; | |
907 | } | |
908 | ||
8e274523 | 909 | return 0; |
2a987ee8 | 910 | } |
4a72ff34 LP |
911 | |
912 | char *strstrip(char *s) { | |
57a8eca8 | 913 | char *e; |
4a72ff34 LP |
914 | |
915 | /* Drops trailing whitespace. Modifies the string in | |
916 | * place. Returns pointer to first non-space character */ | |
917 | ||
918 | s += strspn(s, WHITESPACE); | |
919 | ||
57a8eca8 LP |
920 | for (e = strchr(s, 0); e > s; e --) |
921 | if (!strchr(WHITESPACE, e[-1])) | |
922 | break; | |
4a72ff34 | 923 | |
57a8eca8 | 924 | *e = 0; |
4a72ff34 LP |
925 | |
926 | return s; | |
4a72ff34 LP |
927 | } |
928 | ||
ee9b5e01 LP |
929 | char *delete_chars(char *s, const char *bad) { |
930 | char *f, *t; | |
931 | ||
932 | /* Drops all whitespace, regardless where in the string */ | |
933 | ||
934 | for (f = s, t = s; *f; f++) { | |
935 | if (strchr(bad, *f)) | |
936 | continue; | |
937 | ||
938 | *(t++) = *f; | |
939 | } | |
940 | ||
941 | *t = 0; | |
942 | ||
943 | return s; | |
944 | } | |
945 | ||
ab1f0633 LP |
946 | bool in_charset(const char *s, const char* charset) { |
947 | const char *i; | |
948 | ||
949 | assert(s); | |
950 | assert(charset); | |
951 | ||
952 | for (i = s; *i; i++) | |
953 | if (!strchr(charset, *i)) | |
954 | return false; | |
955 | ||
956 | return true; | |
957 | } | |
958 | ||
4a72ff34 LP |
959 | char *file_in_same_dir(const char *path, const char *filename) { |
960 | char *e, *r; | |
961 | size_t k; | |
962 | ||
963 | assert(path); | |
964 | assert(filename); | |
965 | ||
966 | /* This removes the last component of path and appends | |
967 | * filename, unless the latter is absolute anyway or the | |
968 | * former isn't */ | |
969 | ||
970 | if (path_is_absolute(filename)) | |
971 | return strdup(filename); | |
972 | ||
973 | if (!(e = strrchr(path, '/'))) | |
974 | return strdup(filename); | |
975 | ||
976 | k = strlen(filename); | |
977 | if (!(r = new(char, e-path+1+k+1))) | |
978 | return NULL; | |
979 | ||
980 | memcpy(r, path, e-path+1); | |
981 | memcpy(r+(e-path)+1, filename, k+1); | |
982 | ||
983 | return r; | |
984 | } | |
fb624d04 | 985 | |
c32dd69b LP |
986 | int rmdir_parents(const char *path, const char *stop) { |
987 | size_t l; | |
988 | int r = 0; | |
989 | ||
990 | assert(path); | |
991 | assert(stop); | |
992 | ||
993 | l = strlen(path); | |
994 | ||
995 | /* Skip trailing slashes */ | |
996 | while (l > 0 && path[l-1] == '/') | |
997 | l--; | |
998 | ||
999 | while (l > 0) { | |
1000 | char *t; | |
1001 | ||
1002 | /* Skip last component */ | |
1003 | while (l > 0 && path[l-1] != '/') | |
1004 | l--; | |
1005 | ||
1006 | /* Skip trailing slashes */ | |
1007 | while (l > 0 && path[l-1] == '/') | |
1008 | l--; | |
1009 | ||
1010 | if (l <= 0) | |
1011 | break; | |
1012 | ||
1013 | if (!(t = strndup(path, l))) | |
1014 | return -ENOMEM; | |
1015 | ||
1016 | if (path_startswith(stop, t)) { | |
1017 | free(t); | |
1018 | return 0; | |
1019 | } | |
1020 | ||
1021 | r = rmdir(t); | |
1022 | free(t); | |
1023 | ||
1024 | if (r < 0) | |
1025 | if (errno != ENOENT) | |
1026 | return -errno; | |
1027 | } | |
1028 | ||
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | ||
fb624d04 LP |
1033 | char hexchar(int x) { |
1034 | static const char table[16] = "0123456789abcdef"; | |
1035 | ||
1036 | return table[x & 15]; | |
1037 | } | |
4fe88d28 LP |
1038 | |
1039 | int unhexchar(char c) { | |
1040 | ||
1041 | if (c >= '0' && c <= '9') | |
1042 | return c - '0'; | |
1043 | ||
1044 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1045 | return c - 'a' + 10; |
4fe88d28 LP |
1046 | |
1047 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1048 | return c - 'A' + 10; |
4fe88d28 LP |
1049 | |
1050 | return -1; | |
1051 | } | |
1052 | ||
1053 | char octchar(int x) { | |
1054 | return '0' + (x & 7); | |
1055 | } | |
1056 | ||
1057 | int unoctchar(char c) { | |
1058 | ||
1059 | if (c >= '0' && c <= '7') | |
1060 | return c - '0'; | |
1061 | ||
1062 | return -1; | |
1063 | } | |
1064 | ||
5af98f82 LP |
1065 | char decchar(int x) { |
1066 | return '0' + (x % 10); | |
1067 | } | |
1068 | ||
1069 | int undecchar(char c) { | |
1070 | ||
1071 | if (c >= '0' && c <= '9') | |
1072 | return c - '0'; | |
1073 | ||
1074 | return -1; | |
1075 | } | |
1076 | ||
4fe88d28 LP |
1077 | char *cescape(const char *s) { |
1078 | char *r, *t; | |
1079 | const char *f; | |
1080 | ||
1081 | assert(s); | |
1082 | ||
1083 | /* Does C style string escaping. */ | |
1084 | ||
f8e2fb7b LP |
1085 | r = new(char, strlen(s)*4 + 1); |
1086 | if (!r) | |
4fe88d28 LP |
1087 | return NULL; |
1088 | ||
1089 | for (f = s, t = r; *f; f++) | |
1090 | ||
1091 | switch (*f) { | |
1092 | ||
1093 | case '\a': | |
1094 | *(t++) = '\\'; | |
1095 | *(t++) = 'a'; | |
1096 | break; | |
1097 | case '\b': | |
1098 | *(t++) = '\\'; | |
1099 | *(t++) = 'b'; | |
1100 | break; | |
1101 | case '\f': | |
1102 | *(t++) = '\\'; | |
1103 | *(t++) = 'f'; | |
1104 | break; | |
1105 | case '\n': | |
1106 | *(t++) = '\\'; | |
1107 | *(t++) = 'n'; | |
1108 | break; | |
1109 | case '\r': | |
1110 | *(t++) = '\\'; | |
1111 | *(t++) = 'r'; | |
1112 | break; | |
1113 | case '\t': | |
1114 | *(t++) = '\\'; | |
1115 | *(t++) = 't'; | |
1116 | break; | |
1117 | case '\v': | |
1118 | *(t++) = '\\'; | |
1119 | *(t++) = 'v'; | |
1120 | break; | |
1121 | case '\\': | |
1122 | *(t++) = '\\'; | |
1123 | *(t++) = '\\'; | |
1124 | break; | |
1125 | case '"': | |
1126 | *(t++) = '\\'; | |
1127 | *(t++) = '"'; | |
1128 | break; | |
1129 | case '\'': | |
1130 | *(t++) = '\\'; | |
1131 | *(t++) = '\''; | |
1132 | break; | |
1133 | ||
1134 | default: | |
1135 | /* For special chars we prefer octal over | |
1136 | * hexadecimal encoding, simply because glib's | |
1137 | * g_strescape() does the same */ | |
1138 | if ((*f < ' ') || (*f >= 127)) { | |
1139 | *(t++) = '\\'; | |
1140 | *(t++) = octchar((unsigned char) *f >> 6); | |
1141 | *(t++) = octchar((unsigned char) *f >> 3); | |
1142 | *(t++) = octchar((unsigned char) *f); | |
1143 | } else | |
1144 | *(t++) = *f; | |
1145 | break; | |
1146 | } | |
1147 | ||
1148 | *t = 0; | |
1149 | ||
1150 | return r; | |
1151 | } | |
1152 | ||
5b4c61cd | 1153 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1154 | char *r, *t; |
1155 | const char *f; | |
5b4c61cd | 1156 | size_t pl; |
4fe88d28 LP |
1157 | |
1158 | assert(s); | |
1159 | ||
5b4c61cd LP |
1160 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1161 | ||
1162 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1163 | |
5b4c61cd | 1164 | r = new(char, pl+length+1); |
7f110ff9 | 1165 | if (!r) |
4fe88d28 LP |
1166 | return r; |
1167 | ||
5b4c61cd LP |
1168 | if (prefix) |
1169 | memcpy(r, prefix, pl); | |
1170 | ||
1171 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1172 | |
1173 | if (*f != '\\') { | |
1174 | *(t++) = *f; | |
1175 | continue; | |
1176 | } | |
1177 | ||
1178 | f++; | |
1179 | ||
1180 | switch (*f) { | |
1181 | ||
1182 | case 'a': | |
1183 | *(t++) = '\a'; | |
1184 | break; | |
1185 | case 'b': | |
1186 | *(t++) = '\b'; | |
1187 | break; | |
1188 | case 'f': | |
1189 | *(t++) = '\f'; | |
1190 | break; | |
1191 | case 'n': | |
1192 | *(t++) = '\n'; | |
1193 | break; | |
1194 | case 'r': | |
1195 | *(t++) = '\r'; | |
1196 | break; | |
1197 | case 't': | |
1198 | *(t++) = '\t'; | |
1199 | break; | |
1200 | case 'v': | |
1201 | *(t++) = '\v'; | |
1202 | break; | |
1203 | case '\\': | |
1204 | *(t++) = '\\'; | |
1205 | break; | |
1206 | case '"': | |
1207 | *(t++) = '"'; | |
1208 | break; | |
1209 | case '\'': | |
1210 | *(t++) = '\''; | |
1211 | break; | |
1212 | ||
e167fb86 LP |
1213 | case 's': |
1214 | /* This is an extension of the XDG syntax files */ | |
1215 | *(t++) = ' '; | |
1216 | break; | |
1217 | ||
4fe88d28 LP |
1218 | case 'x': { |
1219 | /* hexadecimal encoding */ | |
1220 | int a, b; | |
1221 | ||
7f110ff9 LP |
1222 | a = unhexchar(f[1]); |
1223 | b = unhexchar(f[2]); | |
1224 | ||
1225 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1226 | /* Invalid escape code, let's take it literal then */ |
1227 | *(t++) = '\\'; | |
1228 | *(t++) = 'x'; | |
1229 | } else { | |
1230 | *(t++) = (char) ((a << 4) | b); | |
1231 | f += 2; | |
1232 | } | |
1233 | ||
1234 | break; | |
1235 | } | |
1236 | ||
1237 | case '0': | |
1238 | case '1': | |
1239 | case '2': | |
1240 | case '3': | |
1241 | case '4': | |
1242 | case '5': | |
1243 | case '6': | |
1244 | case '7': { | |
1245 | /* octal encoding */ | |
1246 | int a, b, c; | |
1247 | ||
7f110ff9 LP |
1248 | a = unoctchar(f[0]); |
1249 | b = unoctchar(f[1]); | |
1250 | c = unoctchar(f[2]); | |
1251 | ||
1252 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1253 | /* Invalid escape code, let's take it literal then */ |
1254 | *(t++) = '\\'; | |
1255 | *(t++) = f[0]; | |
1256 | } else { | |
1257 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1258 | f += 2; | |
1259 | } | |
1260 | ||
1261 | break; | |
1262 | } | |
1263 | ||
1264 | case 0: | |
1265 | /* premature end of string.*/ | |
1266 | *(t++) = '\\'; | |
1267 | goto finish; | |
1268 | ||
1269 | default: | |
1270 | /* Invalid escape code, let's take it literal then */ | |
1271 | *(t++) = '\\'; | |
f3d4cc01 | 1272 | *(t++) = *f; |
4fe88d28 LP |
1273 | break; |
1274 | } | |
1275 | } | |
1276 | ||
1277 | finish: | |
1278 | *t = 0; | |
1279 | return r; | |
1280 | } | |
1281 | ||
5b4c61cd LP |
1282 | char *cunescape_length(const char *s, size_t length) { |
1283 | return cunescape_length_with_prefix(s, length, NULL); | |
1284 | } | |
1285 | ||
6febfd0d | 1286 | char *cunescape(const char *s) { |
5b4c61cd LP |
1287 | assert(s); |
1288 | ||
6febfd0d LP |
1289 | return cunescape_length(s, strlen(s)); |
1290 | } | |
4fe88d28 LP |
1291 | |
1292 | char *xescape(const char *s, const char *bad) { | |
1293 | char *r, *t; | |
1294 | const char *f; | |
1295 | ||
1296 | /* Escapes all chars in bad, in addition to \ and all special | |
1297 | * chars, in \xFF style escaping. May be reversed with | |
1298 | * cunescape. */ | |
1299 | ||
08ace05b LP |
1300 | r = new(char, strlen(s) * 4 + 1); |
1301 | if (!r) | |
4fe88d28 LP |
1302 | return NULL; |
1303 | ||
1304 | for (f = s, t = r; *f; f++) { | |
1305 | ||
b866264a LP |
1306 | if ((*f < ' ') || (*f >= 127) || |
1307 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1308 | *(t++) = '\\'; |
1309 | *(t++) = 'x'; | |
1310 | *(t++) = hexchar(*f >> 4); | |
1311 | *(t++) = hexchar(*f); | |
1312 | } else | |
1313 | *(t++) = *f; | |
1314 | } | |
1315 | ||
1316 | *t = 0; | |
1317 | ||
1318 | return r; | |
1319 | } | |
1320 | ||
ea430986 | 1321 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1322 | char *r, *t; |
1323 | const char *f; | |
1324 | ||
47be870b LP |
1325 | assert(s); |
1326 | ||
ea430986 LP |
1327 | /* Escapes all chars that D-Bus' object path cannot deal |
1328 | * with. Can be reverse with bus_path_unescape() */ | |
1329 | ||
1330 | if (!(r = new(char, strlen(s)*3+1))) | |
1331 | return NULL; | |
1332 | ||
1333 | for (f = s, t = r; *f; f++) { | |
1334 | ||
1335 | if (!(*f >= 'A' && *f <= 'Z') && | |
1336 | !(*f >= 'a' && *f <= 'z') && | |
1337 | !(*f >= '0' && *f <= '9')) { | |
1338 | *(t++) = '_'; | |
1339 | *(t++) = hexchar(*f >> 4); | |
1340 | *(t++) = hexchar(*f); | |
1341 | } else | |
1342 | *(t++) = *f; | |
1343 | } | |
1344 | ||
1345 | *t = 0; | |
1346 | ||
1347 | return r; | |
1348 | } | |
1349 | ||
9e2f7c11 | 1350 | char *bus_path_unescape(const char *f) { |
ea430986 | 1351 | char *r, *t; |
ea430986 | 1352 | |
9e2f7c11 | 1353 | assert(f); |
47be870b | 1354 | |
9e2f7c11 | 1355 | if (!(r = strdup(f))) |
ea430986 LP |
1356 | return NULL; |
1357 | ||
9e2f7c11 | 1358 | for (t = r; *f; f++) { |
ea430986 LP |
1359 | |
1360 | if (*f == '_') { | |
1361 | int a, b; | |
1362 | ||
1363 | if ((a = unhexchar(f[1])) < 0 || | |
1364 | (b = unhexchar(f[2])) < 0) { | |
1365 | /* Invalid escape code, let's take it literal then */ | |
1366 | *(t++) = '_'; | |
1367 | } else { | |
1368 | *(t++) = (char) ((a << 4) | b); | |
1369 | f += 2; | |
1370 | } | |
1371 | } else | |
1372 | *(t++) = *f; | |
1373 | } | |
1374 | ||
1375 | *t = 0; | |
1376 | ||
1377 | return r; | |
1378 | } | |
1379 | ||
67d51650 | 1380 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1381 | char *p; |
1382 | ||
67d51650 | 1383 | assert(t); |
4fe88d28 | 1384 | |
67d51650 | 1385 | for (p = t; *p; p++) |
4fe88d28 LP |
1386 | if (*p >= 'A' && *p <= 'Z') |
1387 | *p = *p - 'A' + 'a'; | |
1388 | ||
67d51650 | 1389 | return t; |
4fe88d28 | 1390 | } |
1dccbe19 | 1391 | |
a228a22f | 1392 | static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1393 | assert(filename); |
1394 | ||
1395 | return | |
1396 | filename[0] == '.' || | |
6c78be3c | 1397 | streq(filename, "lost+found") || |
e472d476 LP |
1398 | streq(filename, "aquota.user") || |
1399 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1400 | endswith(filename, ".rpmnew") || |
1401 | endswith(filename, ".rpmsave") || | |
1402 | endswith(filename, ".rpmorig") || | |
1403 | endswith(filename, ".dpkg-old") || | |
1404 | endswith(filename, ".dpkg-new") || | |
1405 | endswith(filename, ".swp"); | |
1406 | } | |
1407 | ||
a228a22f LP |
1408 | bool ignore_file(const char *filename) { |
1409 | assert(filename); | |
1410 | ||
1411 | if (endswith(filename, "~")) | |
1412 | return false; | |
1413 | ||
1414 | return ignore_file_allow_backup(filename); | |
1415 | } | |
1416 | ||
3a0ecb08 LP |
1417 | int fd_nonblock(int fd, bool nonblock) { |
1418 | int flags; | |
1419 | ||
1420 | assert(fd >= 0); | |
1421 | ||
1422 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1423 | return -errno; | |
1424 | ||
1425 | if (nonblock) | |
1426 | flags |= O_NONBLOCK; | |
1427 | else | |
1428 | flags &= ~O_NONBLOCK; | |
1429 | ||
1430 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1431 | return -errno; | |
1432 | ||
1433 | return 0; | |
1434 | } | |
1435 | ||
1436 | int fd_cloexec(int fd, bool cloexec) { | |
1437 | int flags; | |
1438 | ||
1439 | assert(fd >= 0); | |
1440 | ||
1441 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1442 | return -errno; | |
1443 | ||
1444 | if (cloexec) | |
1445 | flags |= FD_CLOEXEC; | |
1446 | else | |
1447 | flags &= ~FD_CLOEXEC; | |
1448 | ||
1449 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1450 | return -errno; | |
1451 | ||
1452 | return 0; | |
1453 | } | |
1454 | ||
b19be9eb LP |
1455 | static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
1456 | unsigned i; | |
1457 | ||
1458 | assert(n_fdset == 0 || fdset); | |
1459 | ||
1460 | for (i = 0; i < n_fdset; i++) | |
1461 | if (fdset[i] == fd) | |
1462 | return true; | |
1463 | ||
1464 | return false; | |
1465 | } | |
1466 | ||
a0d40ac5 LP |
1467 | int close_all_fds(const int except[], unsigned n_except) { |
1468 | DIR *d; | |
1469 | struct dirent *de; | |
1470 | int r = 0; | |
1471 | ||
b19be9eb LP |
1472 | assert(n_except == 0 || except); |
1473 | ||
1474 | d = opendir("/proc/self/fd"); | |
1475 | if (!d) { | |
1476 | int fd; | |
1477 | struct rlimit rl; | |
1478 | ||
1479 | /* When /proc isn't available (for example in chroots) | |
1480 | * the fallback is brute forcing through the fd | |
1481 | * table */ | |
1482 | ||
1483 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1484 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1485 | ||
1486 | if (fd_in_set(fd, except, n_except)) | |
1487 | continue; | |
1488 | ||
1489 | if (close_nointr(fd) < 0) | |
1490 | if (errno != EBADF && r == 0) | |
1491 | r = -errno; | |
1492 | } | |
1493 | ||
1494 | return r; | |
1495 | } | |
a0d40ac5 LP |
1496 | |
1497 | while ((de = readdir(d))) { | |
a7610064 | 1498 | int fd = -1; |
a0d40ac5 | 1499 | |
a16e1123 | 1500 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1501 | continue; |
1502 | ||
720ce21d LP |
1503 | if (safe_atoi(de->d_name, &fd) < 0) |
1504 | /* Let's better ignore this, just in case */ | |
1505 | continue; | |
a0d40ac5 LP |
1506 | |
1507 | if (fd < 3) | |
1508 | continue; | |
1509 | ||
1510 | if (fd == dirfd(d)) | |
1511 | continue; | |
1512 | ||
b19be9eb LP |
1513 | if (fd_in_set(fd, except, n_except)) |
1514 | continue; | |
a0d40ac5 | 1515 | |
720ce21d | 1516 | if (close_nointr(fd) < 0) { |
2f357920 | 1517 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1518 | if (errno != EBADF && r == 0) |
1519 | r = -errno; | |
2f357920 | 1520 | } |
a0d40ac5 LP |
1521 | } |
1522 | ||
a0d40ac5 LP |
1523 | closedir(d); |
1524 | return r; | |
1525 | } | |
1526 | ||
db12775d LP |
1527 | bool chars_intersect(const char *a, const char *b) { |
1528 | const char *p; | |
1529 | ||
1530 | /* Returns true if any of the chars in a are in b. */ | |
1531 | for (p = a; *p; p++) | |
1532 | if (strchr(b, *p)) | |
1533 | return true; | |
1534 | ||
1535 | return false; | |
1536 | } | |
1537 | ||
42856c10 | 1538 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
1539 | static const char table[] = |
1540 | "cifs\0" | |
1541 | "smbfs\0" | |
1542 | "ncpfs\0" | |
1543 | "nfs\0" | |
1544 | "nfs4\0" | |
1545 | "gfs\0" | |
73836c5c | 1546 | "gfs2\0"; |
42856c10 | 1547 | |
a05f97b3 | 1548 | return nulstr_contains(table, fstype); |
42856c10 LP |
1549 | } |
1550 | ||
601f6a1e | 1551 | int chvt(int vt) { |
a05f97b3 | 1552 | _cleanup_close_ int fd; |
601f6a1e | 1553 | |
a05f97b3 LP |
1554 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1555 | if (fd < 0) | |
601f6a1e LP |
1556 | return -errno; |
1557 | ||
1558 | if (vt < 0) { | |
1559 | int tiocl[2] = { | |
1560 | TIOCL_GETKMSGREDIRECT, | |
1561 | 0 | |
1562 | }; | |
1563 | ||
a05f97b3 LP |
1564 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1565 | return -errno; | |
601f6a1e LP |
1566 | |
1567 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1568 | } | |
1569 | ||
1570 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1571 | return -errno; |
601f6a1e | 1572 | |
a05f97b3 | 1573 | return 0; |
601f6a1e LP |
1574 | } |
1575 | ||
8f2d43a0 | 1576 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
1577 | struct termios old_termios, new_termios; |
1578 | char c; | |
20c03b7b | 1579 | char line[LINE_MAX]; |
80876c20 LP |
1580 | |
1581 | assert(f); | |
1582 | assert(ret); | |
1583 | ||
1584 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1585 | new_termios = old_termios; | |
1586 | ||
1587 | new_termios.c_lflag &= ~ICANON; | |
1588 | new_termios.c_cc[VMIN] = 1; | |
1589 | new_termios.c_cc[VTIME] = 0; | |
1590 | ||
1591 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1592 | size_t k; | |
1593 | ||
8f2d43a0 LP |
1594 | if (t != (usec_t) -1) { |
1595 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
1596 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1597 | return -ETIMEDOUT; | |
1598 | } | |
1599 | } | |
1600 | ||
80876c20 LP |
1601 | k = fread(&c, 1, 1, f); |
1602 | ||
1603 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1604 | ||
1605 | if (k <= 0) | |
1606 | return -EIO; | |
1607 | ||
1608 | if (need_nl) | |
1609 | *need_nl = c != '\n'; | |
1610 | ||
1611 | *ret = c; | |
1612 | return 0; | |
1613 | } | |
1614 | } | |
1615 | ||
8f2d43a0 LP |
1616 | if (t != (usec_t) -1) |
1617 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
1618 | return -ETIMEDOUT; | |
1619 | ||
1620 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
1621 | return -EIO; |
1622 | ||
1623 | truncate_nl(line); | |
1624 | ||
1625 | if (strlen(line) != 1) | |
1626 | return -EBADMSG; | |
1627 | ||
1628 | if (need_nl) | |
1629 | *need_nl = false; | |
1630 | ||
1631 | *ret = line[0]; | |
1632 | return 0; | |
1633 | } | |
1634 | ||
1635 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 | 1636 | |
80876c20 LP |
1637 | assert(ret); |
1638 | assert(replies); | |
1639 | assert(text); | |
1640 | ||
1641 | for (;;) { | |
1642 | va_list ap; | |
1643 | char c; | |
1644 | int r; | |
1645 | bool need_nl = true; | |
1646 | ||
8481248b | 1647 | if (on_tty()) |
c1072ea0 | 1648 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1649 | |
80876c20 LP |
1650 | va_start(ap, text); |
1651 | vprintf(text, ap); | |
1652 | va_end(ap); | |
1653 | ||
8481248b | 1654 | if (on_tty()) |
c1072ea0 | 1655 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1656 | |
80876c20 LP |
1657 | fflush(stdout); |
1658 | ||
8f2d43a0 LP |
1659 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
1660 | if (r < 0) { | |
80876c20 LP |
1661 | |
1662 | if (r == -EBADMSG) { | |
1663 | puts("Bad input, please try again."); | |
1664 | continue; | |
1665 | } | |
1666 | ||
1667 | putchar('\n'); | |
1668 | return r; | |
1669 | } | |
1670 | ||
1671 | if (need_nl) | |
1672 | putchar('\n'); | |
1673 | ||
1674 | if (strchr(replies, c)) { | |
1675 | *ret = c; | |
1676 | return 0; | |
1677 | } | |
1678 | ||
1679 | puts("Read unexpected character, please try again."); | |
1680 | } | |
1681 | } | |
1682 | ||
512947d4 | 1683 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
1684 | struct termios termios; |
1685 | int r = 0; | |
3fe5e5d4 LP |
1686 | |
1687 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
1688 | |
1689 | assert(fd >= 0); | |
1690 | ||
eed1d0e3 LP |
1691 | /* We leave locked terminal attributes untouched, so that |
1692 | * Plymouth may set whatever it wants to set, and we don't | |
1693 | * interfere with that. */ | |
3fe5e5d4 LP |
1694 | |
1695 | /* Disable exclusive mode, just in case */ | |
1696 | ioctl(fd, TIOCNXCL); | |
1697 | ||
5c0100a5 | 1698 | /* Switch to text mode */ |
512947d4 MS |
1699 | if (switch_to_text) |
1700 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 1701 | |
3fe5e5d4 | 1702 | /* Enable console unicode mode */ |
df465b3f | 1703 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
1704 | |
1705 | if (tcgetattr(fd, &termios) < 0) { | |
1706 | r = -errno; | |
1707 | goto finish; | |
1708 | } | |
1709 | ||
aaf694ca LP |
1710 | /* We only reset the stuff that matters to the software. How |
1711 | * hardware is set up we don't touch assuming that somebody | |
1712 | * else will do that for us */ | |
1713 | ||
1714 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
1715 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
1716 | termios.c_oflag |= ONLCR; | |
1717 | termios.c_cflag |= CREAD; | |
1718 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
1719 | ||
1720 | termios.c_cc[VINTR] = 03; /* ^C */ | |
1721 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
1722 | termios.c_cc[VERASE] = 0177; | |
1723 | termios.c_cc[VKILL] = 025; /* ^X */ | |
1724 | termios.c_cc[VEOF] = 04; /* ^D */ | |
1725 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
1726 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
1727 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
1728 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
1729 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
1730 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
1731 | termios.c_cc[VEOL] = 0; |
1732 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
1733 | |
1734 | termios.c_cc[VTIME] = 0; | |
1735 | termios.c_cc[VMIN] = 1; | |
1736 | ||
1737 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
1738 | r = -errno; | |
1739 | ||
1740 | finish: | |
1741 | /* Just in case, flush all crap out */ | |
1742 | tcflush(fd, TCIOFLUSH); | |
1743 | ||
1744 | return r; | |
1745 | } | |
1746 | ||
6ea832a2 LP |
1747 | int reset_terminal(const char *name) { |
1748 | int fd, r; | |
1749 | ||
1750 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
1751 | if (fd < 0) | |
1752 | return fd; | |
1753 | ||
512947d4 | 1754 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
1755 | close_nointr_nofail(fd); |
1756 | ||
1757 | return r; | |
1758 | } | |
1759 | ||
80876c20 LP |
1760 | int open_terminal(const char *name, int mode) { |
1761 | int fd, r; | |
f73f76ac | 1762 | unsigned c = 0; |
80876c20 | 1763 | |
f73f76ac LP |
1764 | /* |
1765 | * If a TTY is in the process of being closed opening it might | |
1766 | * cause EIO. This is horribly awful, but unlikely to be | |
1767 | * changed in the kernel. Hence we work around this problem by | |
1768 | * retrying a couple of times. | |
1769 | * | |
1770 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
1771 | */ | |
1772 | ||
1773 | for (;;) { | |
af6da548 LP |
1774 | fd = open(name, mode); |
1775 | if (fd >= 0) | |
f73f76ac LP |
1776 | break; |
1777 | ||
1778 | if (errno != EIO) | |
1779 | return -errno; | |
1780 | ||
af6da548 | 1781 | /* Max 1s in total */ |
f73f76ac LP |
1782 | if (c >= 20) |
1783 | return -errno; | |
1784 | ||
1785 | usleep(50 * USEC_PER_MSEC); | |
1786 | c++; | |
1787 | } | |
1788 | ||
1789 | if (fd < 0) | |
80876c20 LP |
1790 | return -errno; |
1791 | ||
af6da548 LP |
1792 | r = isatty(fd); |
1793 | if (r < 0) { | |
80876c20 LP |
1794 | close_nointr_nofail(fd); |
1795 | return -errno; | |
1796 | } | |
1797 | ||
1798 | if (!r) { | |
1799 | close_nointr_nofail(fd); | |
1800 | return -ENOTTY; | |
1801 | } | |
1802 | ||
1803 | return fd; | |
1804 | } | |
1805 | ||
1806 | int flush_fd(int fd) { | |
1807 | struct pollfd pollfd; | |
1808 | ||
1809 | zero(pollfd); | |
1810 | pollfd.fd = fd; | |
1811 | pollfd.events = POLLIN; | |
1812 | ||
1813 | for (;;) { | |
20c03b7b | 1814 | char buf[LINE_MAX]; |
80876c20 LP |
1815 | ssize_t l; |
1816 | int r; | |
1817 | ||
1818 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
1819 | ||
1820 | if (errno == EINTR) | |
1821 | continue; | |
1822 | ||
1823 | return -errno; | |
1824 | } | |
1825 | ||
1826 | if (r == 0) | |
1827 | return 0; | |
1828 | ||
1829 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
1830 | ||
1831 | if (errno == EINTR) | |
1832 | continue; | |
1833 | ||
1834 | if (errno == EAGAIN) | |
1835 | return 0; | |
1836 | ||
1837 | return -errno; | |
1838 | } | |
1839 | ||
1840 | if (l <= 0) | |
1841 | return 0; | |
1842 | } | |
1843 | } | |
1844 | ||
af6da548 LP |
1845 | int acquire_terminal( |
1846 | const char *name, | |
1847 | bool fail, | |
1848 | bool force, | |
1849 | bool ignore_tiocstty_eperm, | |
1850 | usec_t timeout) { | |
1851 | ||
4a0ff478 | 1852 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 1853 | usec_t ts = 0; |
32c4bef8 | 1854 | struct sigaction sa_old, sa_new; |
80876c20 LP |
1855 | |
1856 | assert(name); | |
1857 | ||
1858 | /* We use inotify to be notified when the tty is closed. We | |
1859 | * create the watch before checking if we can actually acquire | |
1860 | * it, so that we don't lose any event. | |
1861 | * | |
1862 | * Note: strictly speaking this actually watches for the | |
1863 | * device being closed, it does *not* really watch whether a | |
1864 | * tty loses its controlling process. However, unless some | |
1865 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
1866 | * its tty otherwise this will not become a problem. As long | |
1867 | * as the administrator makes sure not configure any service | |
1868 | * on the same tty as an untrusted user this should not be a | |
1869 | * problem. (Which he probably should not do anyway.) */ | |
1870 | ||
af6da548 LP |
1871 | if (timeout != (usec_t) -1) |
1872 | ts = now(CLOCK_MONOTONIC); | |
1873 | ||
80876c20 | 1874 | if (!fail && !force) { |
af6da548 LP |
1875 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
1876 | if (notify < 0) { | |
80876c20 LP |
1877 | r = -errno; |
1878 | goto fail; | |
1879 | } | |
1880 | ||
af6da548 LP |
1881 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
1882 | if (wd < 0) { | |
80876c20 LP |
1883 | r = -errno; |
1884 | goto fail; | |
1885 | } | |
1886 | } | |
1887 | ||
1888 | for (;;) { | |
af6da548 LP |
1889 | if (notify >= 0) { |
1890 | r = flush_fd(notify); | |
1891 | if (r < 0) | |
e3d1855b | 1892 | goto fail; |
af6da548 | 1893 | } |
80876c20 LP |
1894 | |
1895 | /* We pass here O_NOCTTY only so that we can check the return | |
1896 | * value TIOCSCTTY and have a reliable way to figure out if we | |
1897 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
1898 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
1899 | if (fd < 0) | |
6ea832a2 | 1900 | return fd; |
80876c20 | 1901 | |
32c4bef8 LP |
1902 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
1903 | * if we already own the tty. */ | |
1904 | zero(sa_new); | |
1905 | sa_new.sa_handler = SIG_IGN; | |
1906 | sa_new.sa_flags = SA_RESTART; | |
1907 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
1908 | ||
80876c20 | 1909 | /* First, try to get the tty */ |
32c4bef8 LP |
1910 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
1911 | r = -errno; | |
1912 | ||
1913 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
1914 | |
1915 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
1916 | * returning EPERM, i.e. when very likely we already | |
1917 | * are have this controlling terminal. */ | |
32c4bef8 | 1918 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
1919 | r = 0; |
1920 | ||
32c4bef8 | 1921 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
1922 | goto fail; |
1923 | } | |
1924 | ||
1925 | if (r >= 0) | |
1926 | break; | |
1927 | ||
1928 | assert(!fail); | |
1929 | assert(!force); | |
1930 | assert(notify >= 0); | |
1931 | ||
1932 | for (;;) { | |
f601daa7 | 1933 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 1934 | ssize_t l; |
f601daa7 | 1935 | struct inotify_event *e; |
80876c20 | 1936 | |
af6da548 LP |
1937 | if (timeout != (usec_t) -1) { |
1938 | usec_t n; | |
1939 | ||
1940 | n = now(CLOCK_MONOTONIC); | |
1941 | if (ts + timeout < n) { | |
1942 | r = -ETIMEDOUT; | |
1943 | goto fail; | |
1944 | } | |
1945 | ||
1946 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
1947 | if (r < 0) | |
1948 | goto fail; | |
1949 | ||
1950 | if (r == 0) { | |
1951 | r = -ETIMEDOUT; | |
1952 | goto fail; | |
1953 | } | |
1954 | } | |
1955 | ||
1956 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
1957 | if (l < 0) { | |
80876c20 | 1958 | |
af6da548 | 1959 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
1960 | continue; |
1961 | ||
1962 | r = -errno; | |
1963 | goto fail; | |
1964 | } | |
1965 | ||
1966 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 1967 | |
f601daa7 LP |
1968 | while (l > 0) { |
1969 | size_t step; | |
80876c20 | 1970 | |
f601daa7 | 1971 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 1972 | r = -EIO; |
f601daa7 LP |
1973 | goto fail; |
1974 | } | |
80876c20 | 1975 | |
f601daa7 LP |
1976 | step = sizeof(struct inotify_event) + e->len; |
1977 | assert(step <= (size_t) l); | |
80876c20 | 1978 | |
f601daa7 LP |
1979 | e = (struct inotify_event*) ((uint8_t*) e + step); |
1980 | l -= step; | |
80876c20 LP |
1981 | } |
1982 | ||
1983 | break; | |
1984 | } | |
1985 | ||
1986 | /* We close the tty fd here since if the old session | |
1987 | * ended our handle will be dead. It's important that | |
1988 | * we do this after sleeping, so that we don't enter | |
1989 | * an endless loop. */ | |
1990 | close_nointr_nofail(fd); | |
1991 | } | |
1992 | ||
1993 | if (notify >= 0) | |
a16e1123 | 1994 | close_nointr_nofail(notify); |
80876c20 | 1995 | |
512947d4 MS |
1996 | r = reset_terminal_fd(fd, true); |
1997 | if (r < 0) | |
80876c20 LP |
1998 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
1999 | ||
2000 | return fd; | |
2001 | ||
2002 | fail: | |
2003 | if (fd >= 0) | |
a16e1123 | 2004 | close_nointr_nofail(fd); |
80876c20 LP |
2005 | |
2006 | if (notify >= 0) | |
a16e1123 | 2007 | close_nointr_nofail(notify); |
80876c20 LP |
2008 | |
2009 | return r; | |
2010 | } | |
2011 | ||
2012 | int release_terminal(void) { | |
2013 | int r = 0, fd; | |
57cd2192 | 2014 | struct sigaction sa_old, sa_new; |
80876c20 | 2015 | |
ccaa6149 | 2016 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0) |
80876c20 LP |
2017 | return -errno; |
2018 | ||
57cd2192 LP |
2019 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2020 | * by our own TIOCNOTTY */ | |
2021 | ||
2022 | zero(sa_new); | |
2023 | sa_new.sa_handler = SIG_IGN; | |
2024 | sa_new.sa_flags = SA_RESTART; | |
2025 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2026 | ||
80876c20 LP |
2027 | if (ioctl(fd, TIOCNOTTY) < 0) |
2028 | r = -errno; | |
2029 | ||
57cd2192 LP |
2030 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2031 | ||
80876c20 LP |
2032 | close_nointr_nofail(fd); |
2033 | return r; | |
2034 | } | |
2035 | ||
9a34ec5f LP |
2036 | int sigaction_many(const struct sigaction *sa, ...) { |
2037 | va_list ap; | |
2038 | int r = 0, sig; | |
2039 | ||
2040 | va_start(ap, sa); | |
2041 | while ((sig = va_arg(ap, int)) > 0) | |
2042 | if (sigaction(sig, sa, NULL) < 0) | |
2043 | r = -errno; | |
2044 | va_end(ap); | |
2045 | ||
2046 | return r; | |
2047 | } | |
2048 | ||
2049 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2050 | struct sigaction sa; |
9a34ec5f LP |
2051 | va_list ap; |
2052 | int r = 0; | |
a337c6fc LP |
2053 | |
2054 | zero(sa); | |
2055 | sa.sa_handler = SIG_IGN; | |
2056 | sa.sa_flags = SA_RESTART; | |
2057 | ||
9a34ec5f LP |
2058 | if (sigaction(sig, &sa, NULL) < 0) |
2059 | r = -errno; | |
2060 | ||
2061 | va_start(ap, sig); | |
2062 | while ((sig = va_arg(ap, int)) > 0) | |
2063 | if (sigaction(sig, &sa, NULL) < 0) | |
2064 | r = -errno; | |
2065 | va_end(ap); | |
2066 | ||
2067 | return r; | |
2068 | } | |
2069 | ||
2070 | int default_signals(int sig, ...) { | |
2071 | struct sigaction sa; | |
2072 | va_list ap; | |
2073 | int r = 0; | |
2074 | ||
2075 | zero(sa); | |
2076 | sa.sa_handler = SIG_DFL; | |
2077 | sa.sa_flags = SA_RESTART; | |
2078 | ||
2079 | if (sigaction(sig, &sa, NULL) < 0) | |
2080 | r = -errno; | |
2081 | ||
2082 | va_start(ap, sig); | |
2083 | while ((sig = va_arg(ap, int)) > 0) | |
2084 | if (sigaction(sig, &sa, NULL) < 0) | |
2085 | r = -errno; | |
2086 | va_end(ap); | |
2087 | ||
2088 | return r; | |
a337c6fc LP |
2089 | } |
2090 | ||
8d567588 LP |
2091 | int close_pipe(int p[]) { |
2092 | int a = 0, b = 0; | |
2093 | ||
2094 | assert(p); | |
2095 | ||
2096 | if (p[0] >= 0) { | |
2097 | a = close_nointr(p[0]); | |
2098 | p[0] = -1; | |
2099 | } | |
2100 | ||
2101 | if (p[1] >= 0) { | |
2102 | b = close_nointr(p[1]); | |
2103 | p[1] = -1; | |
2104 | } | |
2105 | ||
2106 | return a < 0 ? a : b; | |
2107 | } | |
2108 | ||
eb22ac37 | 2109 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2110 | uint8_t *p; |
2111 | ssize_t n = 0; | |
2112 | ||
2113 | assert(fd >= 0); | |
2114 | assert(buf); | |
2115 | ||
2116 | p = buf; | |
2117 | ||
2118 | while (nbytes > 0) { | |
2119 | ssize_t k; | |
2120 | ||
2121 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2122 | ||
eb22ac37 | 2123 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2124 | continue; |
2125 | ||
eb22ac37 | 2126 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2127 | struct pollfd pollfd; |
2128 | ||
2129 | zero(pollfd); | |
2130 | pollfd.fd = fd; | |
2131 | pollfd.events = POLLIN; | |
2132 | ||
2133 | if (poll(&pollfd, 1, -1) < 0) { | |
2134 | if (errno == EINTR) | |
2135 | continue; | |
2136 | ||
2137 | return n > 0 ? n : -errno; | |
2138 | } | |
2139 | ||
2140 | if (pollfd.revents != POLLIN) | |
2141 | return n > 0 ? n : -EIO; | |
2142 | ||
2143 | continue; | |
2144 | } | |
2145 | ||
2146 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2147 | } | |
2148 | ||
2149 | p += k; | |
2150 | nbytes -= k; | |
2151 | n += k; | |
2152 | } | |
2153 | ||
2154 | return n; | |
2155 | } | |
2156 | ||
eb22ac37 LP |
2157 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2158 | const uint8_t *p; | |
2159 | ssize_t n = 0; | |
2160 | ||
2161 | assert(fd >= 0); | |
2162 | assert(buf); | |
2163 | ||
2164 | p = buf; | |
2165 | ||
2166 | while (nbytes > 0) { | |
2167 | ssize_t k; | |
2168 | ||
fe652127 LP |
2169 | k = write(fd, p, nbytes); |
2170 | if (k <= 0) { | |
eb22ac37 LP |
2171 | |
2172 | if (k < 0 && errno == EINTR) | |
2173 | continue; | |
2174 | ||
2175 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2176 | struct pollfd pollfd; | |
2177 | ||
2178 | zero(pollfd); | |
2179 | pollfd.fd = fd; | |
2180 | pollfd.events = POLLOUT; | |
2181 | ||
2182 | if (poll(&pollfd, 1, -1) < 0) { | |
2183 | if (errno == EINTR) | |
2184 | continue; | |
2185 | ||
2186 | return n > 0 ? n : -errno; | |
2187 | } | |
2188 | ||
2189 | if (pollfd.revents != POLLOUT) | |
2190 | return n > 0 ? n : -EIO; | |
2191 | ||
2192 | continue; | |
2193 | } | |
2194 | ||
2195 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2196 | } | |
2197 | ||
2198 | p += k; | |
2199 | nbytes -= k; | |
2200 | n += k; | |
2201 | } | |
2202 | ||
2203 | return n; | |
2204 | } | |
2205 | ||
ab1f0633 LP |
2206 | int parse_bytes(const char *t, off_t *bytes) { |
2207 | static const struct { | |
2208 | const char *suffix; | |
2209 | off_t factor; | |
2210 | } table[] = { | |
2211 | { "B", 1 }, | |
2212 | { "K", 1024ULL }, | |
2213 | { "M", 1024ULL*1024ULL }, | |
2214 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2215 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2216 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2217 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2218 | { "", 1 }, |
2219 | }; | |
2220 | ||
2221 | const char *p; | |
2222 | off_t r = 0; | |
2223 | ||
2224 | assert(t); | |
2225 | assert(bytes); | |
2226 | ||
2227 | p = t; | |
2228 | do { | |
2229 | long long l; | |
2230 | char *e; | |
2231 | unsigned i; | |
2232 | ||
2233 | errno = 0; | |
2234 | l = strtoll(p, &e, 10); | |
2235 | ||
2236 | if (errno != 0) | |
2237 | return -errno; | |
2238 | ||
2239 | if (l < 0) | |
2240 | return -ERANGE; | |
2241 | ||
2242 | if (e == p) | |
2243 | return -EINVAL; | |
2244 | ||
2245 | e += strspn(e, WHITESPACE); | |
2246 | ||
2247 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2248 | if (startswith(e, table[i].suffix)) { | |
2249 | r += (off_t) l * table[i].factor; | |
2250 | p = e + strlen(table[i].suffix); | |
2251 | break; | |
2252 | } | |
2253 | ||
2254 | if (i >= ELEMENTSOF(table)) | |
2255 | return -EINVAL; | |
2256 | ||
2257 | } while (*p != 0); | |
2258 | ||
2259 | *bytes = r; | |
2260 | ||
2261 | return 0; | |
2262 | } | |
2263 | ||
843d2643 LP |
2264 | int make_stdio(int fd) { |
2265 | int r, s, t; | |
2266 | ||
2267 | assert(fd >= 0); | |
2268 | ||
73836c5c LP |
2269 | r = dup3(fd, STDIN_FILENO, 0); |
2270 | s = dup3(fd, STDOUT_FILENO, 0); | |
2271 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2272 | |
2273 | if (fd >= 3) | |
2274 | close_nointr_nofail(fd); | |
2275 | ||
2276 | if (r < 0 || s < 0 || t < 0) | |
2277 | return -errno; | |
2278 | ||
73836c5c | 2279 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2280 | |
843d2643 LP |
2281 | return 0; |
2282 | } | |
2283 | ||
ade509ce LP |
2284 | int make_null_stdio(void) { |
2285 | int null_fd; | |
2286 | ||
cd3bd60a LP |
2287 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2288 | if (null_fd < 0) | |
ade509ce LP |
2289 | return -errno; |
2290 | ||
2291 | return make_stdio(null_fd); | |
2292 | } | |
2293 | ||
8407a5d0 LP |
2294 | bool is_device_path(const char *path) { |
2295 | ||
2296 | /* Returns true on paths that refer to a device, either in | |
2297 | * sysfs or in /dev */ | |
2298 | ||
2299 | return | |
2300 | path_startswith(path, "/dev/") || | |
2301 | path_startswith(path, "/sys/"); | |
2302 | } | |
2303 | ||
01f78473 | 2304 | int dir_is_empty(const char *path) { |
a05f97b3 | 2305 | _cleanup_closedir_ DIR *d; |
01f78473 | 2306 | int r; |
01f78473 | 2307 | |
a05f97b3 LP |
2308 | d = opendir(path); |
2309 | if (!d) | |
01f78473 LP |
2310 | return -errno; |
2311 | ||
2312 | for (;;) { | |
7d5e9c0f LP |
2313 | struct dirent *de; |
2314 | union dirent_storage buf; | |
01f78473 | 2315 | |
7d5e9c0f | 2316 | r = readdir_r(d, &buf.de, &de); |
a05f97b3 LP |
2317 | if (r > 0) |
2318 | return -r; | |
01f78473 | 2319 | |
a05f97b3 LP |
2320 | if (!de) |
2321 | return 1; | |
01f78473 | 2322 | |
a05f97b3 LP |
2323 | if (!ignore_file(de->d_name)) |
2324 | return 0; | |
2325 | } | |
01f78473 LP |
2326 | } |
2327 | ||
d3782d60 | 2328 | unsigned long long random_ull(void) { |
a05f97b3 | 2329 | _cleanup_close_ int fd; |
d3782d60 LP |
2330 | uint64_t ull; |
2331 | ssize_t r; | |
2332 | ||
ac0930c8 LP |
2333 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2334 | if (fd < 0) | |
d3782d60 LP |
2335 | goto fallback; |
2336 | ||
eb22ac37 | 2337 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
2338 | if (r != sizeof(ull)) |
2339 | goto fallback; | |
2340 | ||
2341 | return ull; | |
2342 | ||
2343 | fallback: | |
2344 | return random() * RAND_MAX + random(); | |
2345 | } | |
2346 | ||
5b6319dc LP |
2347 | void rename_process(const char name[8]) { |
2348 | assert(name); | |
2349 | ||
5d6b1584 LP |
2350 | /* This is a like a poor man's setproctitle(). It changes the |
2351 | * comm field, argv[0], and also the glibc's internally used | |
2352 | * name of the process. For the first one a limit of 16 chars | |
2353 | * applies, to the second one usually one of 10 (i.e. length | |
2354 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2355 | * "systemd"). If you pass a longer string it will be | |
2356 | * truncated */ | |
5b6319dc | 2357 | |
5d6b1584 | 2358 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2359 | |
2360 | if (program_invocation_name) | |
2361 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2362 | |
2363 | if (saved_argc > 0) { | |
2364 | int i; | |
2365 | ||
2366 | if (saved_argv[0]) | |
2367 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2368 | ||
2369 | for (i = 1; i < saved_argc; i++) { | |
2370 | if (!saved_argv[i]) | |
2371 | break; | |
2372 | ||
2373 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
2374 | } | |
2375 | } | |
5b6319dc LP |
2376 | } |
2377 | ||
7d793605 LP |
2378 | void sigset_add_many(sigset_t *ss, ...) { |
2379 | va_list ap; | |
2380 | int sig; | |
2381 | ||
2382 | assert(ss); | |
2383 | ||
2384 | va_start(ap, ss); | |
2385 | while ((sig = va_arg(ap, int)) > 0) | |
2386 | assert_se(sigaddset(ss, sig) == 0); | |
2387 | va_end(ap); | |
2388 | } | |
2389 | ||
ef2f1067 LP |
2390 | char* gethostname_malloc(void) { |
2391 | struct utsname u; | |
2392 | ||
2393 | assert_se(uname(&u) >= 0); | |
2394 | ||
344de609 | 2395 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2396 | return strdup(u.nodename); |
2397 | ||
2398 | return strdup(u.sysname); | |
2399 | } | |
2400 | ||
344de609 LP |
2401 | bool hostname_is_set(void) { |
2402 | struct utsname u; | |
2403 | ||
2404 | assert_se(uname(&u) >= 0); | |
2405 | ||
2406 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2407 | } | |
2408 | ||
7c5f152a | 2409 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2410 | long bufsize; |
a05f97b3 LP |
2411 | char *name; |
2412 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2413 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2414 | |
2415 | /* Shortcut things to avoid NSS lookups */ | |
2416 | if (uid == 0) | |
2417 | return strdup("root"); | |
2418 | ||
7c5f152a LP |
2419 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2420 | if (bufsize <= 0) | |
ef2f1067 LP |
2421 | bufsize = 4096; |
2422 | ||
7c5f152a LP |
2423 | buf = malloc(bufsize); |
2424 | if (!buf) | |
ef2f1067 LP |
2425 | return NULL; |
2426 | ||
a05f97b3 LP |
2427 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2428 | return strdup(pw->pw_name); | |
ef2f1067 LP |
2429 | |
2430 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
2431 | return NULL; | |
2432 | ||
2433 | return name; | |
2434 | } | |
2435 | ||
7c5f152a LP |
2436 | char* getlogname_malloc(void) { |
2437 | uid_t uid; | |
2438 | struct stat st; | |
2439 | ||
2440 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2441 | uid = st.st_uid; | |
2442 | else | |
2443 | uid = getuid(); | |
2444 | ||
2445 | return lookup_uid(uid); | |
2446 | } | |
2447 | ||
2448 | char *getusername_malloc(void) { | |
2449 | const char *e; | |
2450 | ||
2451 | e = getenv("USER"); | |
2452 | if (e) | |
2453 | return strdup(e); | |
2454 | ||
2455 | return lookup_uid(getuid()); | |
2456 | } | |
2457 | ||
fc116c6a LP |
2458 | int getttyname_malloc(int fd, char **r) { |
2459 | char path[PATH_MAX], *c; | |
618e02c7 | 2460 | int k; |
8c6db833 LP |
2461 | |
2462 | assert(r); | |
ef2f1067 | 2463 | |
a05f97b3 LP |
2464 | k = ttyname_r(fd, path, sizeof(path)); |
2465 | if (k != 0) | |
618e02c7 | 2466 | return -k; |
ef2f1067 LP |
2467 | |
2468 | char_array_0(path); | |
2469 | ||
a05f97b3 LP |
2470 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2471 | if (!c) | |
8c6db833 LP |
2472 | return -ENOMEM; |
2473 | ||
2474 | *r = c; | |
2475 | return 0; | |
2476 | } | |
2477 | ||
fc116c6a LP |
2478 | int getttyname_harder(int fd, char **r) { |
2479 | int k; | |
2480 | char *s; | |
2481 | ||
a05f97b3 LP |
2482 | k = getttyname_malloc(fd, &s); |
2483 | if (k < 0) | |
fc116c6a LP |
2484 | return k; |
2485 | ||
2486 | if (streq(s, "tty")) { | |
2487 | free(s); | |
4d6d6518 | 2488 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2489 | } |
2490 | ||
2491 | *r = s; | |
2492 | return 0; | |
2493 | } | |
2494 | ||
4d6d6518 | 2495 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
fc116c6a | 2496 | int k; |
4d6d6518 | 2497 | char line[LINE_MAX], *p, *fn; |
fc116c6a LP |
2498 | unsigned long ttynr; |
2499 | FILE *f; | |
2500 | ||
4d6d6518 LP |
2501 | if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0) |
2502 | return -ENOMEM; | |
2503 | ||
2504 | f = fopen(fn, "re"); | |
2505 | free(fn); | |
2506 | if (!f) | |
fc116c6a LP |
2507 | return -errno; |
2508 | ||
4d6d6518 | 2509 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 2510 | k = feof(f) ? -EIO : -errno; |
fc116c6a LP |
2511 | fclose(f); |
2512 | return k; | |
2513 | } | |
2514 | ||
2515 | fclose(f); | |
2516 | ||
4d6d6518 LP |
2517 | p = strrchr(line, ')'); |
2518 | if (!p) | |
fc116c6a LP |
2519 | return -EIO; |
2520 | ||
2521 | p++; | |
2522 | ||
2523 | if (sscanf(p, " " | |
2524 | "%*c " /* state */ | |
2525 | "%*d " /* ppid */ | |
2526 | "%*d " /* pgrp */ | |
2527 | "%*d " /* session */ | |
2528 | "%lu ", /* ttynr */ | |
2529 | &ttynr) != 1) | |
2530 | return -EIO; | |
2531 | ||
11dc5d2b LP |
2532 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2533 | return -ENOENT; | |
2534 | ||
fc116c6a LP |
2535 | *d = (dev_t) ttynr; |
2536 | return 0; | |
2537 | } | |
2538 | ||
4d6d6518 | 2539 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 2540 | int k; |
20c03b7b | 2541 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
2542 | dev_t devnr; |
2543 | ||
2544 | assert(r); | |
2545 | ||
4d6d6518 LP |
2546 | k = get_ctty_devnr(pid, &devnr); |
2547 | if (k < 0) | |
fc116c6a LP |
2548 | return k; |
2549 | ||
2550 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
2551 | char_array_0(fn); | |
2552 | ||
23406ce5 LP |
2553 | k = readlink_malloc(fn, &s); |
2554 | if (k < 0) { | |
fc116c6a LP |
2555 | |
2556 | if (k != -ENOENT) | |
2557 | return k; | |
2558 | ||
46824d0e LP |
2559 | /* This is an ugly hack */ |
2560 | if (major(devnr) == 136) { | |
2561 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
2562 | return -ENOMEM; | |
2563 | ||
2564 | *r = b; | |
2565 | if (_devnr) | |
2566 | *_devnr = devnr; | |
2567 | ||
2568 | return 0; | |
2569 | } | |
2570 | ||
fc116c6a LP |
2571 | /* Probably something like the ptys which have no |
2572 | * symlink in /dev/char. Let's return something | |
2573 | * vaguely useful. */ | |
2574 | ||
23406ce5 LP |
2575 | b = strdup(fn + 5); |
2576 | if (!b) | |
fc116c6a LP |
2577 | return -ENOMEM; |
2578 | ||
2579 | *r = b; | |
46824d0e LP |
2580 | if (_devnr) |
2581 | *_devnr = devnr; | |
2582 | ||
fc116c6a LP |
2583 | return 0; |
2584 | } | |
2585 | ||
2586 | if (startswith(s, "/dev/")) | |
2587 | p = s + 5; | |
2588 | else if (startswith(s, "../")) | |
2589 | p = s + 3; | |
2590 | else | |
2591 | p = s; | |
2592 | ||
2593 | b = strdup(p); | |
2594 | free(s); | |
2595 | ||
2596 | if (!b) | |
2597 | return -ENOMEM; | |
2598 | ||
2599 | *r = b; | |
46824d0e LP |
2600 | if (_devnr) |
2601 | *_devnr = devnr; | |
2602 | ||
fc116c6a LP |
2603 | return 0; |
2604 | } | |
2605 | ||
f56d5db9 | 2606 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
2607 | DIR *d; |
2608 | int ret = 0; | |
2609 | ||
2610 | assert(fd >= 0); | |
2611 | ||
2612 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2613 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2614 | |
d4d046e3 LP |
2615 | d = fdopendir(fd); |
2616 | if (!d) { | |
8c6db833 | 2617 | close_nointr_nofail(fd); |
4c633005 LP |
2618 | |
2619 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2620 | } |
2621 | ||
2622 | for (;;) { | |
7d5e9c0f LP |
2623 | struct dirent *de; |
2624 | union dirent_storage buf; | |
7925c22a LP |
2625 | bool is_dir, keep_around; |
2626 | struct stat st; | |
8c6db833 LP |
2627 | int r; |
2628 | ||
7d5e9c0f | 2629 | r = readdir_r(d, &buf.de, &de); |
d4d046e3 LP |
2630 | if (r != 0 && ret == 0) { |
2631 | ret = -r; | |
8c6db833 LP |
2632 | break; |
2633 | } | |
2634 | ||
2635 | if (!de) | |
2636 | break; | |
2637 | ||
2638 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
2639 | continue; | |
2640 | ||
7925c22a LP |
2641 | if (de->d_type == DT_UNKNOWN || |
2642 | honour_sticky || | |
2643 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2644 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2645 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2646 | ret = -errno; |
2647 | continue; | |
2648 | } | |
2649 | ||
2650 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2651 | keep_around = |
2652 | honour_sticky && | |
2653 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2654 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2655 | } else { |
8c6db833 | 2656 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2657 | keep_around = false; |
ad293f5a | 2658 | } |
8c6db833 LP |
2659 | |
2660 | if (is_dir) { | |
2661 | int subdir_fd; | |
8c6db833 | 2662 | |
597f43c7 | 2663 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
2664 | if (root_dev && st.st_dev != root_dev->st_dev) |
2665 | continue; | |
8c6db833 | 2666 | |
7925c22a LP |
2667 | subdir_fd = openat(fd, de->d_name, |
2668 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
2669 | if (subdir_fd < 0) { | |
2670 | if (ret == 0 && errno != ENOENT) | |
2671 | ret = -errno; | |
2672 | continue; | |
2673 | } | |
2674 | ||
b3d28469 | 2675 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
2676 | if (r < 0 && ret == 0) |
2677 | ret = r; | |
2678 | ||
2679 | if (!keep_around) | |
2680 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
2681 | if (ret == 0 && errno != ENOENT) |
2682 | ret = -errno; | |
2683 | } | |
2684 | ||
2685 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
2686 | |
2687 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 2688 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2689 | ret = -errno; |
2690 | } | |
2691 | } | |
2692 | } | |
2693 | ||
2694 | closedir(d); | |
2695 | ||
2696 | return ret; | |
2697 | } | |
2698 | ||
943aad8c ZJS |
2699 | static int is_temporary_fs(struct statfs *s) { |
2700 | assert(s); | |
2701 | return s->f_type == TMPFS_MAGIC || | |
2702 | (long)s->f_type == (long)RAMFS_MAGIC; | |
2703 | } | |
2704 | ||
f56d5db9 LP |
2705 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
2706 | struct statfs s; | |
2707 | ||
2708 | assert(fd >= 0); | |
2709 | ||
2710 | if (fstatfs(fd, &s) < 0) { | |
2711 | close_nointr_nofail(fd); | |
2712 | return -errno; | |
2713 | } | |
2714 | ||
2715 | /* We refuse to clean disk file systems with this call. This | |
2716 | * is extra paranoia just to be sure we never ever remove | |
2717 | * non-state data */ | |
943aad8c | 2718 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2719 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2720 | close_nointr_nofail(fd); | |
2721 | return -EPERM; | |
2722 | } | |
2723 | ||
2724 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
2725 | } | |
2726 | ||
2727 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
2728 | int fd, r; | |
2729 | struct statfs s; | |
8c6db833 LP |
2730 | |
2731 | assert(path); | |
2732 | ||
f56d5db9 LP |
2733 | /* We refuse to clean the root file system with this |
2734 | * call. This is extra paranoia to never cause a really | |
2735 | * seriously broken system. */ | |
2736 | if (path_equal(path, "/")) { | |
2737 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
2738 | return -EPERM; | |
2739 | } | |
461b1822 | 2740 | |
d4d046e3 LP |
2741 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
2742 | if (fd < 0) { | |
8c6db833 LP |
2743 | |
2744 | if (errno != ENOTDIR) | |
2745 | return -errno; | |
2746 | ||
f56d5db9 LP |
2747 | if (!dangerous) { |
2748 | if (statfs(path, &s) < 0) | |
2749 | return -errno; | |
2750 | ||
943aad8c | 2751 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2752 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2753 | return -EPERM; | |
2754 | } | |
2755 | } | |
2756 | ||
8c6db833 | 2757 | if (delete_root && !only_dirs) |
d4d046e3 | 2758 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
2759 | return -errno; |
2760 | ||
2761 | return 0; | |
2762 | } | |
2763 | ||
f56d5db9 LP |
2764 | if (!dangerous) { |
2765 | if (fstatfs(fd, &s) < 0) { | |
2766 | close_nointr_nofail(fd); | |
2767 | return -errno; | |
2768 | } | |
ad293f5a | 2769 | |
943aad8c | 2770 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
2771 | log_error("Attempted to remove disk file system, and we can't allow that."); |
2772 | close_nointr_nofail(fd); | |
2773 | return -EPERM; | |
2774 | } | |
2775 | } | |
2776 | ||
2777 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
2778 | if (delete_root) { |
2779 | ||
8d53b453 | 2780 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 2781 | return r; |
8c6db833 | 2782 | |
e27796a0 | 2783 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
2784 | if (r == 0) |
2785 | r = -errno; | |
2786 | } | |
ad293f5a | 2787 | } |
8c6db833 LP |
2788 | |
2789 | return r; | |
2790 | } | |
2791 | ||
f56d5db9 LP |
2792 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
2793 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
2794 | } | |
2795 | ||
2796 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
2797 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
2798 | } | |
2799 | ||
8c6db833 LP |
2800 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
2801 | assert(path); | |
2802 | ||
2803 | /* Under the assumption that we are running privileged we | |
2804 | * first change the access mode and only then hand out | |
2805 | * ownership to avoid a window where access is too open. */ | |
2806 | ||
8d53b453 LP |
2807 | if (mode != (mode_t) -1) |
2808 | if (chmod(path, mode) < 0) | |
2809 | return -errno; | |
8c6db833 | 2810 | |
8d53b453 LP |
2811 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
2812 | if (chown(path, uid, gid) < 0) | |
2813 | return -errno; | |
8c6db833 LP |
2814 | |
2815 | return 0; | |
ef2f1067 LP |
2816 | } |
2817 | ||
f4b47811 LP |
2818 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
2819 | assert(fd >= 0); | |
2820 | ||
2821 | /* Under the assumption that we are running privileged we | |
2822 | * first change the access mode and only then hand out | |
2823 | * ownership to avoid a window where access is too open. */ | |
2824 | ||
2825 | if (fchmod(fd, mode) < 0) | |
2826 | return -errno; | |
2827 | ||
2828 | if (fchown(fd, uid, gid) < 0) | |
2829 | return -errno; | |
2830 | ||
2831 | return 0; | |
2832 | } | |
2833 | ||
82c121a4 LP |
2834 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2835 | cpu_set_t *r; | |
2836 | unsigned n = 1024; | |
2837 | ||
2838 | /* Allocates the cpuset in the right size */ | |
2839 | ||
2840 | for (;;) { | |
2841 | if (!(r = CPU_ALLOC(n))) | |
2842 | return NULL; | |
2843 | ||
2844 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2845 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2846 | ||
2847 | if (ncpus) | |
2848 | *ncpus = n; | |
2849 | ||
2850 | return r; | |
2851 | } | |
2852 | ||
2853 | CPU_FREE(r); | |
2854 | ||
2855 | if (errno != EINVAL) | |
2856 | return NULL; | |
2857 | ||
2858 | n *= 2; | |
2859 | } | |
2860 | } | |
2861 | ||
669bec5d | 2862 | int status_vprintf(const char *status, bool ellipse, const char *format, va_list ap) { |
9ab7a8d2 | 2863 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
2864 | _cleanup_free_ char *s = NULL; |
2865 | _cleanup_close_ int fd = -1; | |
81beb750 LP |
2866 | struct iovec iovec[5]; |
2867 | int n = 0; | |
9e58ff9c LP |
2868 | |
2869 | assert(format); | |
2870 | ||
9ab7a8d2 | 2871 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
2872 | * optional and go exclusively to the console. */ |
2873 | ||
2874 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 2875 | return log_oom(); |
9e58ff9c | 2876 | |
67e5cc4f | 2877 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 2878 | if (fd < 0) |
669bec5d | 2879 | return fd; |
9e58ff9c | 2880 | |
67e5cc4f | 2881 | if (ellipse) { |
9ab7a8d2 MS |
2882 | char *e; |
2883 | size_t emax, sl; | |
2884 | int c; | |
2885 | ||
67e5cc4f LP |
2886 | c = fd_columns(fd); |
2887 | if (c <= 0) | |
2888 | c = 80; | |
81beb750 | 2889 | |
669bec5d | 2890 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
2891 | |
2892 | emax = c - sl - 1; | |
2893 | if (emax < 3) | |
2894 | emax = 3; | |
81beb750 | 2895 | |
67e5cc4f LP |
2896 | e = ellipsize(s, emax, 75); |
2897 | if (e) { | |
2898 | free(s); | |
2899 | s = e; | |
2900 | } | |
81beb750 LP |
2901 | } |
2902 | ||
2903 | zero(iovec); | |
81beb750 | 2904 | |
9ab7a8d2 MS |
2905 | if (status) { |
2906 | if (!isempty(status)) { | |
2907 | IOVEC_SET_STRING(iovec[n++], "["); | |
2908 | IOVEC_SET_STRING(iovec[n++], status); | |
2909 | IOVEC_SET_STRING(iovec[n++], "] "); | |
2910 | } else | |
2911 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
2912 | } |
2913 | ||
9ab7a8d2 MS |
2914 | IOVEC_SET_STRING(iovec[n++], s); |
2915 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 2916 | |
669bec5d LP |
2917 | if (writev(fd, iovec, n) < 0) |
2918 | return -errno; | |
9e58ff9c | 2919 | |
669bec5d | 2920 | return 0; |
9e58ff9c LP |
2921 | } |
2922 | ||
669bec5d | 2923 | int status_printf(const char *status, bool ellipse, const char *format, ...) { |
c846ff47 | 2924 | va_list ap; |
669bec5d | 2925 | int r; |
c846ff47 LP |
2926 | |
2927 | assert(format); | |
2928 | ||
2929 | va_start(ap, format); | |
669bec5d | 2930 | r = status_vprintf(status, ellipse, format, ap); |
c846ff47 | 2931 | va_end(ap); |
669bec5d LP |
2932 | |
2933 | return r; | |
c846ff47 LP |
2934 | } |
2935 | ||
669bec5d | 2936 | int status_welcome(void) { |
10aa7034 | 2937 | int r; |
669bec5d LP |
2938 | _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL; |
2939 | ||
2940 | r = parse_env_file("/etc/os-release", NEWLINE, | |
2941 | "PRETTY_NAME", &pretty_name, | |
2942 | "ANSI_COLOR", &ansi_color, | |
2943 | NULL); | |
2944 | if (r < 0 && r != -ENOENT) | |
2945 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
2946 | ||
2947 | return status_printf(NULL, false, | |
2948 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", | |
2949 | isempty(ansi_color) ? "1" : ansi_color, | |
2950 | isempty(pretty_name) ? "Linux" : pretty_name); | |
c846ff47 LP |
2951 | } |
2952 | ||
fab56fc5 LP |
2953 | char *replace_env(const char *format, char **env) { |
2954 | enum { | |
2955 | WORD, | |
c24eb49e | 2956 | CURLY, |
fab56fc5 LP |
2957 | VARIABLE |
2958 | } state = WORD; | |
2959 | ||
2960 | const char *e, *word = format; | |
2961 | char *r = NULL, *k; | |
2962 | ||
2963 | assert(format); | |
2964 | ||
2965 | for (e = format; *e; e ++) { | |
2966 | ||
2967 | switch (state) { | |
2968 | ||
2969 | case WORD: | |
2970 | if (*e == '$') | |
c24eb49e | 2971 | state = CURLY; |
fab56fc5 LP |
2972 | break; |
2973 | ||
c24eb49e LP |
2974 | case CURLY: |
2975 | if (*e == '{') { | |
fab56fc5 LP |
2976 | if (!(k = strnappend(r, word, e-word-1))) |
2977 | goto fail; | |
2978 | ||
2979 | free(r); | |
2980 | r = k; | |
2981 | ||
2982 | word = e-1; | |
2983 | state = VARIABLE; | |
2984 | ||
2985 | } else if (*e == '$') { | |
2986 | if (!(k = strnappend(r, word, e-word))) | |
2987 | goto fail; | |
2988 | ||
2989 | free(r); | |
2990 | r = k; | |
2991 | ||
2992 | word = e+1; | |
2993 | state = WORD; | |
2994 | } else | |
2995 | state = WORD; | |
2996 | break; | |
2997 | ||
2998 | case VARIABLE: | |
c24eb49e | 2999 | if (*e == '}') { |
b95cf362 | 3000 | const char *t; |
fab56fc5 | 3001 | |
4d1a6904 | 3002 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 3003 | |
4d1a6904 LP |
3004 | k = strappend(r, t); |
3005 | if (!k) | |
b95cf362 | 3006 | goto fail; |
fab56fc5 | 3007 | |
b95cf362 LP |
3008 | free(r); |
3009 | r = k; | |
fab56fc5 | 3010 | |
b95cf362 | 3011 | word = e+1; |
fab56fc5 LP |
3012 | state = WORD; |
3013 | } | |
3014 | break; | |
3015 | } | |
3016 | } | |
3017 | ||
3018 | if (!(k = strnappend(r, word, e-word))) | |
3019 | goto fail; | |
3020 | ||
3021 | free(r); | |
3022 | return k; | |
3023 | ||
3024 | fail: | |
3025 | free(r); | |
3026 | return NULL; | |
3027 | } | |
3028 | ||
3029 | char **replace_env_argv(char **argv, char **env) { | |
3030 | char **r, **i; | |
c24eb49e LP |
3031 | unsigned k = 0, l = 0; |
3032 | ||
3033 | l = strv_length(argv); | |
fab56fc5 | 3034 | |
c24eb49e | 3035 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3036 | return NULL; |
3037 | ||
3038 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3039 | |
3040 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3041 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3042 | char *e; | |
3043 | char **w, **m; | |
3044 | unsigned q; | |
c24eb49e | 3045 | |
4d1a6904 LP |
3046 | e = strv_env_get(env, *i+1); |
3047 | if (e) { | |
c24eb49e LP |
3048 | |
3049 | if (!(m = strv_split_quoted(e))) { | |
3050 | r[k] = NULL; | |
3051 | strv_free(r); | |
3052 | return NULL; | |
3053 | } | |
b95cf362 LP |
3054 | } else |
3055 | m = NULL; | |
c24eb49e | 3056 | |
b95cf362 LP |
3057 | q = strv_length(m); |
3058 | l = l + q - 1; | |
c24eb49e | 3059 | |
b95cf362 LP |
3060 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3061 | r[k] = NULL; | |
3062 | strv_free(r); | |
3063 | strv_free(m); | |
3064 | return NULL; | |
3065 | } | |
c24eb49e | 3066 | |
b95cf362 LP |
3067 | r = w; |
3068 | if (m) { | |
c24eb49e LP |
3069 | memcpy(r + k, m, q * sizeof(char*)); |
3070 | free(m); | |
c24eb49e | 3071 | } |
b95cf362 LP |
3072 | |
3073 | k += q; | |
3074 | continue; | |
c24eb49e LP |
3075 | } |
3076 | ||
3077 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3078 | if (!(r[k++] = replace_env(*i, env))) { |
3079 | strv_free(r); | |
3080 | return NULL; | |
3081 | } | |
3082 | } | |
3083 | ||
3084 | r[k] = NULL; | |
3085 | return r; | |
3086 | } | |
3087 | ||
81beb750 LP |
3088 | int fd_columns(int fd) { |
3089 | struct winsize ws; | |
3090 | zero(ws); | |
3091 | ||
3092 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3093 | return -errno; | |
3094 | ||
3095 | if (ws.ws_col <= 0) | |
3096 | return -EIO; | |
3097 | ||
3098 | return ws.ws_col; | |
3099 | } | |
3100 | ||
28917d7d | 3101 | unsigned columns(void) { |
fa776d8e | 3102 | const char *e; |
7009eec2 | 3103 | int c; |
fa776d8e | 3104 | |
28917d7d LP |
3105 | if (_likely_(cached_columns > 0)) |
3106 | return cached_columns; | |
11f96fac | 3107 | |
28917d7d LP |
3108 | c = 0; |
3109 | e = getenv("COLUMNS"); | |
3110 | if (e) | |
7009eec2 | 3111 | safe_atoi(e, &c); |
fa776d8e | 3112 | |
28917d7d LP |
3113 | if (c <= 0) |
3114 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3115 | |
28917d7d LP |
3116 | if (c <= 0) |
3117 | c = 80; | |
11f96fac | 3118 | |
28917d7d LP |
3119 | cached_columns = c; |
3120 | return c; | |
11f96fac ZJS |
3121 | } |
3122 | ||
8f2d43a0 LP |
3123 | int fd_lines(int fd) { |
3124 | struct winsize ws; | |
3125 | zero(ws); | |
3126 | ||
3127 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3128 | return -errno; | |
3129 | ||
3130 | if (ws.ws_row <= 0) | |
3131 | return -EIO; | |
3132 | ||
3133 | return ws.ws_row; | |
3134 | } | |
3135 | ||
3136 | unsigned lines(void) { | |
8f2d43a0 | 3137 | const char *e; |
ed757c0c | 3138 | unsigned l; |
8f2d43a0 | 3139 | |
ed757c0c LP |
3140 | if (_likely_(cached_lines > 0)) |
3141 | return cached_lines; | |
8f2d43a0 | 3142 | |
ed757c0c | 3143 | l = 0; |
8f2d43a0 LP |
3144 | e = getenv("LINES"); |
3145 | if (e) | |
ed757c0c | 3146 | safe_atou(e, &l); |
8f2d43a0 | 3147 | |
ed757c0c LP |
3148 | if (l <= 0) |
3149 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3150 | |
ed757c0c LP |
3151 | if (l <= 0) |
3152 | l = 24; | |
8f2d43a0 | 3153 | |
ed757c0c LP |
3154 | cached_lines = l; |
3155 | return cached_lines; | |
3156 | } | |
3157 | ||
3158 | /* intended to be used as a SIGWINCH sighandler */ | |
3159 | void columns_lines_cache_reset(int signum) { | |
3160 | cached_columns = 0; | |
3161 | cached_lines = 0; | |
3162 | } | |
3163 | ||
3164 | bool on_tty(void) { | |
3165 | static int cached_on_tty = -1; | |
3166 | ||
3167 | if (_unlikely_(cached_on_tty < 0)) | |
3168 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3169 | ||
3170 | return cached_on_tty; | |
8f2d43a0 LP |
3171 | } |
3172 | ||
b4f10a5e LP |
3173 | int running_in_chroot(void) { |
3174 | struct stat a, b; | |
3175 | ||
3176 | zero(a); | |
3177 | zero(b); | |
3178 | ||
3179 | /* Only works as root */ | |
3180 | ||
3181 | if (stat("/proc/1/root", &a) < 0) | |
3182 | return -errno; | |
3183 | ||
3184 | if (stat("/", &b) < 0) | |
3185 | return -errno; | |
3186 | ||
3187 | return | |
3188 | a.st_dev != b.st_dev || | |
3189 | a.st_ino != b.st_ino; | |
3190 | } | |
3191 | ||
72f59706 LP |
3192 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3193 | size_t x; | |
8fe914ec LP |
3194 | char *r; |
3195 | ||
3196 | assert(s); | |
3197 | assert(percent <= 100); | |
72f59706 | 3198 | assert(new_length >= 3); |
8fe914ec | 3199 | |
72f59706 LP |
3200 | if (old_length <= 3 || old_length <= new_length) |
3201 | return strndup(s, old_length); | |
8fe914ec | 3202 | |
72f59706 LP |
3203 | r = new0(char, new_length+1); |
3204 | if (!r) | |
8fe914ec LP |
3205 | return r; |
3206 | ||
72f59706 | 3207 | x = (new_length * percent) / 100; |
8fe914ec | 3208 | |
72f59706 LP |
3209 | if (x > new_length - 3) |
3210 | x = new_length - 3; | |
8fe914ec LP |
3211 | |
3212 | memcpy(r, s, x); | |
3213 | r[x] = '.'; | |
3214 | r[x+1] = '.'; | |
3215 | r[x+2] = '.'; | |
3216 | memcpy(r + x + 3, | |
72f59706 LP |
3217 | s + old_length - (new_length - x - 3), |
3218 | new_length - x - 3); | |
8fe914ec LP |
3219 | |
3220 | return r; | |
3221 | } | |
3222 | ||
72f59706 LP |
3223 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3224 | return ellipsize_mem(s, strlen(s), length, percent); | |
3225 | } | |
3226 | ||
f6144808 LP |
3227 | int touch(const char *path) { |
3228 | int fd; | |
3229 | ||
3230 | assert(path); | |
3231 | ||
73836c5c LP |
3232 | /* This just opens the file for writing, ensuring it |
3233 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3234 | * does it. */ | |
3235 | ||
3236 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3237 | if (fd < 0) | |
f6144808 LP |
3238 | return -errno; |
3239 | ||
3240 | close_nointr_nofail(fd); | |
3241 | return 0; | |
3242 | } | |
afea26ad | 3243 | |
97c4a07d | 3244 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3245 | size_t l; |
3246 | assert(s); | |
3247 | ||
73836c5c LP |
3248 | /* This is rather stupid, simply removes the heading and |
3249 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3250 | * escaping or anything. We should make this smarter one |
3251 | * day...*/ | |
73836c5c | 3252 | |
31ed59c5 LP |
3253 | l = strlen(s); |
3254 | if (l < 2) | |
11ce3427 LP |
3255 | return strdup(s); |
3256 | ||
97c4a07d | 3257 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3258 | return strndup(s+1, l-2); |
3259 | ||
3260 | return strdup(s); | |
3261 | } | |
3262 | ||
5f7c426e | 3263 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3264 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3265 | char *eq, *r; | |
5f7c426e | 3266 | |
57f30678 LP |
3267 | eq = strchr(s, '='); |
3268 | if (!eq) { | |
3269 | char *t; | |
5f7c426e | 3270 | |
57f30678 LP |
3271 | r = strdup(s); |
3272 | if (!r) | |
5f7c426e LP |
3273 | return NULL; |
3274 | ||
57f30678 LP |
3275 | t = strstrip(r); |
3276 | if (t == r) | |
3277 | return r; | |
3278 | ||
3279 | memmove(r, t, strlen(t) + 1); | |
3280 | return r; | |
5f7c426e LP |
3281 | } |
3282 | ||
57f30678 LP |
3283 | name = strndup(s, eq - s); |
3284 | if (!name) | |
5f7c426e LP |
3285 | return NULL; |
3286 | ||
57f30678 LP |
3287 | p = strdup(eq + 1); |
3288 | if (!p) | |
5f7c426e | 3289 | return NULL; |
5f7c426e LP |
3290 | |
3291 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3292 | if (!value) |
5f7c426e | 3293 | return NULL; |
5f7c426e | 3294 | |
57f30678 | 3295 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3296 | r = NULL; |
3297 | ||
5f7c426e LP |
3298 | return r; |
3299 | } | |
3300 | ||
8e12a6ae | 3301 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3302 | siginfo_t dummy; |
3303 | ||
2e78aa99 | 3304 | assert(pid >= 1); |
1968a360 LP |
3305 | |
3306 | if (!status) | |
3307 | status = &dummy; | |
2e78aa99 LP |
3308 | |
3309 | for (;;) { | |
8e12a6ae LP |
3310 | zero(*status); |
3311 | ||
3312 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3313 | |
3314 | if (errno == EINTR) | |
3315 | continue; | |
3316 | ||
3317 | return -errno; | |
3318 | } | |
3319 | ||
3320 | return 0; | |
3321 | } | |
3322 | } | |
3323 | ||
97c4a07d LP |
3324 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3325 | int r; | |
3326 | siginfo_t status; | |
3327 | ||
3328 | assert(name); | |
3329 | assert(pid > 1); | |
3330 | ||
d87be9b0 LP |
3331 | r = wait_for_terminate(pid, &status); |
3332 | if (r < 0) { | |
97c4a07d LP |
3333 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3334 | return r; | |
3335 | } | |
3336 | ||
3337 | if (status.si_code == CLD_EXITED) { | |
3338 | if (status.si_status != 0) { | |
3339 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3340 | return status.si_status; |
97c4a07d LP |
3341 | } |
3342 | ||
3343 | log_debug("%s succeeded.", name); | |
3344 | return 0; | |
3345 | ||
3346 | } else if (status.si_code == CLD_KILLED || | |
3347 | status.si_code == CLD_DUMPED) { | |
3348 | ||
3349 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3350 | return -EPROTO; | |
3351 | } | |
3352 | ||
3353 | log_warning("%s failed due to unknown reason.", name); | |
3354 | return -EPROTO; | |
97c4a07d LP |
3355 | } |
3356 | ||
6a39419f | 3357 | _noreturn_ void freeze(void) { |
720ce21d LP |
3358 | |
3359 | /* Make sure nobody waits for us on a socket anymore */ | |
3360 | close_all_fds(NULL, 0); | |
3361 | ||
c29597a1 LP |
3362 | sync(); |
3363 | ||
3c14d26c LP |
3364 | for (;;) |
3365 | pause(); | |
3366 | } | |
3367 | ||
00dc5d76 LP |
3368 | bool null_or_empty(struct stat *st) { |
3369 | assert(st); | |
3370 | ||
3371 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3372 | return true; | |
3373 | ||
c8f26f42 | 3374 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3375 | return true; |
3376 | ||
3377 | return false; | |
3378 | } | |
3379 | ||
83096483 LP |
3380 | int null_or_empty_path(const char *fn) { |
3381 | struct stat st; | |
3382 | ||
3383 | assert(fn); | |
3384 | ||
3385 | if (stat(fn, &st) < 0) | |
3386 | return -errno; | |
3387 | ||
3388 | return null_or_empty(&st); | |
3389 | } | |
3390 | ||
a247755d | 3391 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3392 | int nfd; |
3393 | DIR *d; | |
3394 | ||
73836c5c LP |
3395 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags); |
3396 | if (nfd < 0) | |
c4731d11 LP |
3397 | return NULL; |
3398 | ||
73836c5c LP |
3399 | d = fdopendir(nfd); |
3400 | if (!d) { | |
c4731d11 LP |
3401 | close_nointr_nofail(nfd); |
3402 | return NULL; | |
3403 | } | |
3404 | ||
3405 | return d; | |
3b63d2d3 LP |
3406 | } |
3407 | ||
8a0867d6 LP |
3408 | int signal_from_string_try_harder(const char *s) { |
3409 | int signo; | |
3410 | assert(s); | |
3411 | ||
73836c5c LP |
3412 | signo = signal_from_string(s); |
3413 | if (signo <= 0) | |
8a0867d6 LP |
3414 | if (startswith(s, "SIG")) |
3415 | return signal_from_string(s+3); | |
3416 | ||
3417 | return signo; | |
3418 | } | |
3419 | ||
383182b5 | 3420 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
e23a0ce8 LP |
3421 | char *dn, *t, *u; |
3422 | int r; | |
3423 | ||
3424 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
3425 | * UTF8 chars unescaped */ | |
3426 | ||
383182b5 DR |
3427 | u = unquote(tagvalue, "\"\'"); |
3428 | if (u == NULL) | |
3429 | return NULL; | |
e23a0ce8 | 3430 | |
383182b5 DR |
3431 | t = xescape(u, "/ "); |
3432 | free(u); | |
e23a0ce8 | 3433 | |
383182b5 DR |
3434 | if (t == NULL) |
3435 | return NULL; | |
e23a0ce8 | 3436 | |
383182b5 DR |
3437 | r = asprintf(&dn, "/dev/disk/by-%s/%s", by, t); |
3438 | free(t); | |
e23a0ce8 | 3439 | |
383182b5 DR |
3440 | if (r < 0) |
3441 | return NULL; | |
e23a0ce8 | 3442 | |
383182b5 DR |
3443 | return dn; |
3444 | } | |
e23a0ce8 | 3445 | |
383182b5 | 3446 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3447 | assert(p); |
3448 | ||
383182b5 DR |
3449 | if (startswith(p, "LABEL=")) |
3450 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3451 | |
383182b5 DR |
3452 | if (startswith(p, "UUID=")) |
3453 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3454 | |
84cc2abf DR |
3455 | if (startswith(p, "PARTUUID=")) |
3456 | return tag_to_udev_node(p+9, "partuuid"); | |
3457 | ||
3458 | if (startswith(p, "PARTLABEL=")) | |
3459 | return tag_to_udev_node(p+10, "partlabel"); | |
3460 | ||
e23a0ce8 LP |
3461 | return strdup(p); |
3462 | } | |
3463 | ||
f212ac12 LP |
3464 | bool tty_is_vc(const char *tty) { |
3465 | assert(tty); | |
3466 | ||
3467 | if (startswith(tty, "/dev/")) | |
3468 | tty += 5; | |
3469 | ||
98a28fef LP |
3470 | return vtnr_from_tty(tty) >= 0; |
3471 | } | |
3472 | ||
d1122ad5 LP |
3473 | bool tty_is_console(const char *tty) { |
3474 | assert(tty); | |
3475 | ||
3476 | if (startswith(tty, "/dev/")) | |
3477 | tty += 5; | |
3478 | ||
3479 | return streq(tty, "console"); | |
3480 | } | |
3481 | ||
98a28fef LP |
3482 | int vtnr_from_tty(const char *tty) { |
3483 | int i, r; | |
3484 | ||
3485 | assert(tty); | |
3486 | ||
3487 | if (startswith(tty, "/dev/")) | |
3488 | tty += 5; | |
3489 | ||
3490 | if (!startswith(tty, "tty") ) | |
3491 | return -EINVAL; | |
3492 | ||
3493 | if (tty[3] < '0' || tty[3] > '9') | |
3494 | return -EINVAL; | |
3495 | ||
3496 | r = safe_atoi(tty+3, &i); | |
3497 | if (r < 0) | |
3498 | return r; | |
3499 | ||
3500 | if (i < 0 || i > 63) | |
3501 | return -EINVAL; | |
3502 | ||
3503 | return i; | |
f212ac12 LP |
3504 | } |
3505 | ||
3043935f | 3506 | bool tty_is_vc_resolve(const char *tty) { |
3030ccd7 | 3507 | char *active = NULL; |
3043935f | 3508 | bool b; |
3030ccd7 | 3509 | |
e3aa71c3 LP |
3510 | assert(tty); |
3511 | ||
3512 | if (startswith(tty, "/dev/")) | |
3513 | tty += 5; | |
3514 | ||
3d9a4122 LP |
3515 | /* Resolve where /dev/console is pointing to, if /sys is |
3516 | * actually ours (i.e. not read-only-mounted which is a sign | |
3517 | * for container setups) */ | |
3518 | if (streq(tty, "console") && path_is_read_only_fs("/sys") <= 0) | |
3030ccd7 | 3519 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { |
079a09fb LP |
3520 | /* If multiple log outputs are configured the |
3521 | * last one is what /dev/console points to */ | |
3043935f LP |
3522 | tty = strrchr(active, ' '); |
3523 | if (tty) | |
079a09fb LP |
3524 | tty++; |
3525 | else | |
3526 | tty = active; | |
3030ccd7 LP |
3527 | } |
3528 | ||
3043935f | 3529 | b = tty_is_vc(tty); |
3030ccd7 | 3530 | free(active); |
e3aa71c3 | 3531 | |
3043935f LP |
3532 | return b; |
3533 | } | |
3534 | ||
3535 | const char *default_term_for_tty(const char *tty) { | |
3536 | assert(tty); | |
3537 | ||
acda6a05 | 3538 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3539 | } |
3540 | ||
87d2c1ff | 3541 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3542 | assert(de); |
3543 | ||
3544 | if (ignore_file(de->d_name)) | |
3545 | return false; | |
3546 | ||
3547 | if (de->d_type != DT_REG && | |
3548 | de->d_type != DT_LNK && | |
3549 | de->d_type != DT_UNKNOWN) | |
3550 | return false; | |
3551 | ||
3552 | return true; | |
3553 | } | |
3554 | ||
87d2c1ff LP |
3555 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3556 | assert(de); | |
3557 | ||
a228a22f LP |
3558 | if (de->d_type != DT_REG && |
3559 | de->d_type != DT_LNK && | |
3560 | de->d_type != DT_UNKNOWN) | |
3561 | return false; | |
3562 | ||
3563 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3564 | return false; |
3565 | ||
3566 | return endswith(de->d_name, suffix); | |
3567 | } | |
3568 | ||
83cc030f LP |
3569 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
3570 | DIR *_d = NULL; | |
3571 | struct dirent *de; | |
3572 | Hashmap *pids = NULL; | |
3573 | ||
3574 | assert(directory); | |
3575 | ||
3576 | /* Executes all binaries in a directory in parallel and waits | |
3577 | * until all they all finished. */ | |
3578 | ||
3579 | if (!d) { | |
3580 | if (!(_d = opendir(directory))) { | |
3581 | ||
3582 | if (errno == ENOENT) | |
3583 | return; | |
3584 | ||
3585 | log_error("Failed to enumerate directory %s: %m", directory); | |
3586 | return; | |
3587 | } | |
3588 | ||
3589 | d = _d; | |
3590 | } | |
3591 | ||
3592 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
3593 | log_error("Failed to allocate set."); | |
3594 | goto finish; | |
3595 | } | |
3596 | ||
3597 | while ((de = readdir(d))) { | |
3598 | char *path; | |
3599 | pid_t pid; | |
3600 | int k; | |
3601 | ||
fb19a739 | 3602 | if (!dirent_is_file(de)) |
83cc030f LP |
3603 | continue; |
3604 | ||
3605 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 3606 | log_oom(); |
83cc030f LP |
3607 | continue; |
3608 | } | |
3609 | ||
3610 | if ((pid = fork()) < 0) { | |
3611 | log_error("Failed to fork: %m"); | |
3612 | free(path); | |
3613 | continue; | |
3614 | } | |
3615 | ||
3616 | if (pid == 0) { | |
3617 | char *_argv[2]; | |
3618 | /* Child */ | |
3619 | ||
3620 | if (!argv) { | |
3621 | _argv[0] = path; | |
3622 | _argv[1] = NULL; | |
3623 | argv = _argv; | |
3624 | } else | |
6edd7d0a | 3625 | argv[0] = path; |
83cc030f LP |
3626 | |
3627 | execv(path, argv); | |
3628 | ||
3629 | log_error("Failed to execute %s: %m", path); | |
3630 | _exit(EXIT_FAILURE); | |
3631 | } | |
3632 | ||
3633 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
3634 | ||
3635 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
3636 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
3637 | free(path); | |
3638 | } | |
3639 | } | |
3640 | ||
3641 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 3642 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
83cc030f LP |
3643 | siginfo_t si; |
3644 | char *path; | |
3645 | ||
3646 | zero(si); | |
ec3f9b53 | 3647 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
3648 | |
3649 | if (errno == EINTR) | |
3650 | continue; | |
3651 | ||
3652 | log_error("waitid() failed: %m"); | |
3653 | goto finish; | |
3654 | } | |
3655 | ||
3656 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 3657 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
3658 | if (si.si_code == CLD_EXITED) |
3659 | log_error("%s exited with exit status %i.", path, si.si_status); | |
3660 | else | |
3661 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
3662 | } else | |
3663 | log_debug("%s exited successfully.", path); | |
3664 | ||
3665 | free(path); | |
3666 | } | |
3667 | } | |
3668 | ||
3669 | finish: | |
3670 | if (_d) | |
3671 | closedir(_d); | |
3672 | ||
3673 | if (pids) | |
3674 | hashmap_free_free(pids); | |
3675 | } | |
3676 | ||
430c18ed LP |
3677 | int kill_and_sigcont(pid_t pid, int sig) { |
3678 | int r; | |
3679 | ||
3680 | r = kill(pid, sig) < 0 ? -errno : 0; | |
3681 | ||
3682 | if (r >= 0) | |
3683 | kill(pid, SIGCONT); | |
3684 | ||
3685 | return r; | |
3686 | } | |
3687 | ||
05feefe0 LP |
3688 | bool nulstr_contains(const char*nulstr, const char *needle) { |
3689 | const char *i; | |
3690 | ||
3691 | if (!nulstr) | |
3692 | return false; | |
3693 | ||
3694 | NULSTR_FOREACH(i, nulstr) | |
3695 | if (streq(i, needle)) | |
3696 | return true; | |
3697 | ||
3698 | return false; | |
3699 | } | |
3700 | ||
6faa1114 | 3701 | bool plymouth_running(void) { |
9408a2d2 | 3702 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
3703 | } |
3704 | ||
9beb3f4d LP |
3705 | char* strshorten(char *s, size_t l) { |
3706 | assert(s); | |
3707 | ||
3708 | if (l < strlen(s)) | |
3709 | s[l] = 0; | |
3710 | ||
3711 | return s; | |
3712 | } | |
3713 | ||
3714 | static bool hostname_valid_char(char c) { | |
3715 | return | |
3716 | (c >= 'a' && c <= 'z') || | |
3717 | (c >= 'A' && c <= 'Z') || | |
3718 | (c >= '0' && c <= '9') || | |
3719 | c == '-' || | |
3720 | c == '_' || | |
3721 | c == '.'; | |
3722 | } | |
3723 | ||
3724 | bool hostname_is_valid(const char *s) { | |
3725 | const char *p; | |
3726 | ||
3727 | if (isempty(s)) | |
3728 | return false; | |
3729 | ||
3730 | for (p = s; *p; p++) | |
3731 | if (!hostname_valid_char(*p)) | |
3732 | return false; | |
3733 | ||
3734 | if (p-s > HOST_NAME_MAX) | |
3735 | return false; | |
3736 | ||
3737 | return true; | |
3738 | } | |
3739 | ||
3740 | char* hostname_cleanup(char *s) { | |
3741 | char *p, *d; | |
3742 | ||
3743 | for (p = s, d = s; *p; p++) | |
3744 | if ((*p >= 'a' && *p <= 'z') || | |
3745 | (*p >= 'A' && *p <= 'Z') || | |
3746 | (*p >= '0' && *p <= '9') || | |
3747 | *p == '-' || | |
3748 | *p == '_' || | |
3749 | *p == '.') | |
3750 | *(d++) = *p; | |
3751 | ||
3752 | *d = 0; | |
3753 | ||
3754 | strshorten(s, HOST_NAME_MAX); | |
3755 | return s; | |
3756 | } | |
3757 | ||
1325aa42 LP |
3758 | int pipe_eof(int fd) { |
3759 | struct pollfd pollfd; | |
3760 | int r; | |
3761 | ||
3762 | zero(pollfd); | |
3763 | pollfd.fd = fd; | |
3764 | pollfd.events = POLLIN|POLLHUP; | |
3765 | ||
3766 | r = poll(&pollfd, 1, 0); | |
3767 | if (r < 0) | |
3768 | return -errno; | |
3769 | ||
3770 | if (r == 0) | |
3771 | return 0; | |
3772 | ||
3773 | return pollfd.revents & POLLHUP; | |
3774 | } | |
3775 | ||
8f2d43a0 | 3776 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b LP |
3777 | struct pollfd pollfd; |
3778 | int r; | |
3779 | ||
3780 | zero(pollfd); | |
3781 | pollfd.fd = fd; | |
3782 | pollfd.events = event; | |
3783 | ||
8f2d43a0 | 3784 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
3785 | if (r < 0) |
3786 | return -errno; | |
3787 | ||
3788 | if (r == 0) | |
3789 | return 0; | |
3790 | ||
3791 | return pollfd.revents; | |
3792 | } | |
3793 | ||
5a3ab509 LP |
3794 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
3795 | FILE *f; | |
3796 | char *t; | |
3797 | const char *fn; | |
3798 | size_t k; | |
3799 | int fd; | |
3800 | ||
3801 | assert(path); | |
3802 | assert(_f); | |
3803 | assert(_temp_path); | |
3804 | ||
3805 | t = new(char, strlen(path) + 1 + 6 + 1); | |
3806 | if (!t) | |
3807 | return -ENOMEM; | |
3808 | ||
9eb977db | 3809 | fn = path_get_file_name(path); |
5a3ab509 LP |
3810 | k = fn-path; |
3811 | memcpy(t, path, k); | |
3812 | t[k] = '.'; | |
3813 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
3814 | ||
3815 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
3816 | if (fd < 0) { | |
3817 | free(t); | |
3818 | return -errno; | |
3819 | } | |
3820 | ||
3821 | f = fdopen(fd, "we"); | |
3822 | if (!f) { | |
3823 | unlink(t); | |
3824 | free(t); | |
3825 | return -errno; | |
3826 | } | |
3827 | ||
3828 | *_f = f; | |
3829 | *_temp_path = t; | |
3830 | ||
3831 | return 0; | |
3832 | } | |
3833 | ||
6ea832a2 | 3834 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
3835 | assert(fd >= 0); |
3836 | ||
6ea832a2 LP |
3837 | if (ioctl(fd, TIOCVHANGUP) < 0) |
3838 | return -errno; | |
3839 | ||
3840 | return 0; | |
3841 | } | |
3842 | ||
3843 | int terminal_vhangup(const char *name) { | |
3844 | int fd, r; | |
3845 | ||
3846 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
3847 | if (fd < 0) | |
3848 | return fd; | |
3849 | ||
3850 | r = terminal_vhangup_fd(fd); | |
3851 | close_nointr_nofail(fd); | |
3852 | ||
3853 | return r; | |
3854 | } | |
3855 | ||
3856 | int vt_disallocate(const char *name) { | |
3857 | int fd, r; | |
3858 | unsigned u; | |
6ea832a2 LP |
3859 | |
3860 | /* Deallocate the VT if possible. If not possible | |
3861 | * (i.e. because it is the active one), at least clear it | |
3862 | * entirely (including the scrollback buffer) */ | |
3863 | ||
b83bc4e9 LP |
3864 | if (!startswith(name, "/dev/")) |
3865 | return -EINVAL; | |
3866 | ||
3867 | if (!tty_is_vc(name)) { | |
3868 | /* So this is not a VT. I guess we cannot deallocate | |
3869 | * it then. But let's at least clear the screen */ | |
3870 | ||
3871 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
3872 | if (fd < 0) | |
3873 | return fd; | |
3874 | ||
8585357a LP |
3875 | loop_write(fd, |
3876 | "\033[r" /* clear scrolling region */ | |
3877 | "\033[H" /* move home */ | |
3878 | "\033[2J", /* clear screen */ | |
3879 | 10, false); | |
b83bc4e9 LP |
3880 | close_nointr_nofail(fd); |
3881 | ||
3882 | return 0; | |
3883 | } | |
6ea832a2 LP |
3884 | |
3885 | if (!startswith(name, "/dev/tty")) | |
3886 | return -EINVAL; | |
3887 | ||
3888 | r = safe_atou(name+8, &u); | |
3889 | if (r < 0) | |
3890 | return r; | |
3891 | ||
3892 | if (u <= 0) | |
b83bc4e9 | 3893 | return -EINVAL; |
6ea832a2 | 3894 | |
b83bc4e9 | 3895 | /* Try to deallocate */ |
6ea832a2 LP |
3896 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
3897 | if (fd < 0) | |
3898 | return fd; | |
3899 | ||
3900 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 3901 | close_nointr_nofail(fd); |
6ea832a2 | 3902 | |
b83bc4e9 LP |
3903 | if (r >= 0) |
3904 | return 0; | |
6ea832a2 | 3905 | |
b83bc4e9 | 3906 | if (errno != EBUSY) |
6ea832a2 | 3907 | return -errno; |
6ea832a2 | 3908 | |
b83bc4e9 LP |
3909 | /* Couldn't deallocate, so let's clear it fully with |
3910 | * scrollback */ | |
3911 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 3912 | if (fd < 0) |
b83bc4e9 | 3913 | return fd; |
6ea832a2 | 3914 | |
8585357a LP |
3915 | loop_write(fd, |
3916 | "\033[r" /* clear scrolling region */ | |
3917 | "\033[H" /* move home */ | |
3918 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
3919 | 10, false); | |
b83bc4e9 | 3920 | close_nointr_nofail(fd); |
6ea832a2 | 3921 | |
b83bc4e9 | 3922 | return 0; |
6ea832a2 LP |
3923 | } |
3924 | ||
34ca941c LP |
3925 | int copy_file(const char *from, const char *to) { |
3926 | int r, fdf, fdt; | |
3927 | ||
3928 | assert(from); | |
3929 | assert(to); | |
3930 | ||
3931 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
3932 | if (fdf < 0) | |
3933 | return -errno; | |
3934 | ||
3935 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
3936 | if (fdt < 0) { | |
3937 | close_nointr_nofail(fdf); | |
3938 | return -errno; | |
3939 | } | |
3940 | ||
3941 | for (;;) { | |
3942 | char buf[PIPE_BUF]; | |
3943 | ssize_t n, k; | |
3944 | ||
3945 | n = read(fdf, buf, sizeof(buf)); | |
3946 | if (n < 0) { | |
3947 | r = -errno; | |
3948 | ||
3949 | close_nointr_nofail(fdf); | |
3950 | close_nointr(fdt); | |
3951 | unlink(to); | |
3952 | ||
3953 | return r; | |
3954 | } | |
3955 | ||
3956 | if (n == 0) | |
3957 | break; | |
3958 | ||
3959 | errno = 0; | |
3960 | k = loop_write(fdt, buf, n, false); | |
3961 | if (n != k) { | |
3962 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
3963 | ||
3964 | close_nointr_nofail(fdf); | |
3965 | close_nointr(fdt); | |
3966 | ||
3967 | unlink(to); | |
3968 | return r; | |
3969 | } | |
3970 | } | |
3971 | ||
3972 | close_nointr_nofail(fdf); | |
3973 | r = close_nointr(fdt); | |
3974 | ||
3975 | if (r < 0) { | |
3976 | unlink(to); | |
3977 | return r; | |
3978 | } | |
3979 | ||
3980 | return 0; | |
3981 | } | |
3982 | ||
424a19f8 LP |
3983 | int symlink_atomic(const char *from, const char *to) { |
3984 | char *x; | |
3985 | _cleanup_free_ char *t; | |
34ca941c LP |
3986 | const char *fn; |
3987 | size_t k; | |
3988 | unsigned long long ull; | |
3989 | unsigned i; | |
3990 | int r; | |
3991 | ||
3992 | assert(from); | |
3993 | assert(to); | |
3994 | ||
3995 | t = new(char, strlen(to) + 1 + 16 + 1); | |
3996 | if (!t) | |
3997 | return -ENOMEM; | |
3998 | ||
9eb977db | 3999 | fn = path_get_file_name(to); |
34ca941c LP |
4000 | k = fn-to; |
4001 | memcpy(t, to, k); | |
4002 | t[k] = '.'; | |
4003 | x = stpcpy(t+k+1, fn); | |
4004 | ||
4005 | ull = random_ull(); | |
4006 | for (i = 0; i < 16; i++) { | |
4007 | *(x++) = hexchar(ull & 0xF); | |
4008 | ull >>= 4; | |
4009 | } | |
4010 | ||
4011 | *x = 0; | |
4012 | ||
424a19f8 LP |
4013 | if (symlink(from, t) < 0) |
4014 | return -errno; | |
34ca941c LP |
4015 | |
4016 | if (rename(t, to) < 0) { | |
4017 | r = -errno; | |
4018 | unlink(t); | |
34ca941c LP |
4019 | return r; |
4020 | } | |
4021 | ||
424a19f8 | 4022 | return 0; |
34ca941c LP |
4023 | } |
4024 | ||
4d6d6518 LP |
4025 | bool display_is_local(const char *display) { |
4026 | assert(display); | |
4027 | ||
4028 | return | |
4029 | display[0] == ':' && | |
4030 | display[1] >= '0' && | |
4031 | display[1] <= '9'; | |
4032 | } | |
4033 | ||
4034 | int socket_from_display(const char *display, char **path) { | |
4035 | size_t k; | |
4036 | char *f, *c; | |
4037 | ||
4038 | assert(display); | |
4039 | assert(path); | |
4040 | ||
4041 | if (!display_is_local(display)) | |
4042 | return -EINVAL; | |
4043 | ||
4044 | k = strspn(display+1, "0123456789"); | |
4045 | ||
4046 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4047 | if (!f) | |
4048 | return -ENOMEM; | |
4049 | ||
4050 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4051 | memcpy(c, display+1, k); | |
4052 | c[k] = 0; | |
4053 | ||
4054 | *path = f; | |
4055 | ||
4056 | return 0; | |
4057 | } | |
4058 | ||
d05c5031 LP |
4059 | int get_user_creds( |
4060 | const char **username, | |
4061 | uid_t *uid, gid_t *gid, | |
4062 | const char **home, | |
4063 | const char **shell) { | |
4064 | ||
1cccf435 | 4065 | struct passwd *p; |
ddd88763 | 4066 | uid_t u; |
1cccf435 MV |
4067 | |
4068 | assert(username); | |
4069 | assert(*username); | |
1cccf435 MV |
4070 | |
4071 | /* We enforce some special rules for uid=0: in order to avoid | |
4072 | * NSS lookups for root we hardcode its data. */ | |
4073 | ||
4074 | if (streq(*username, "root") || streq(*username, "0")) { | |
4075 | *username = "root"; | |
4b67834e LP |
4076 | |
4077 | if (uid) | |
4078 | *uid = 0; | |
4079 | ||
4080 | if (gid) | |
4081 | *gid = 0; | |
4082 | ||
4083 | if (home) | |
4084 | *home = "/root"; | |
d05c5031 LP |
4085 | |
4086 | if (shell) | |
4087 | *shell = "/bin/sh"; | |
4088 | ||
1cccf435 MV |
4089 | return 0; |
4090 | } | |
4091 | ||
ddd88763 | 4092 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4093 | errno = 0; |
ddd88763 | 4094 | p = getpwuid(u); |
1cccf435 MV |
4095 | |
4096 | /* If there are multiple users with the same id, make | |
4097 | * sure to leave $USER to the configured value instead | |
4098 | * of the first occurrence in the database. However if | |
4099 | * the uid was configured by a numeric uid, then let's | |
4100 | * pick the real username from /etc/passwd. */ | |
4101 | if (p) | |
4102 | *username = p->pw_name; | |
4103 | } else { | |
4104 | errno = 0; | |
4105 | p = getpwnam(*username); | |
4106 | } | |
4107 | ||
4108 | if (!p) | |
4109 | return errno != 0 ? -errno : -ESRCH; | |
4110 | ||
4b67834e LP |
4111 | if (uid) |
4112 | *uid = p->pw_uid; | |
4113 | ||
4114 | if (gid) | |
4115 | *gid = p->pw_gid; | |
4116 | ||
4117 | if (home) | |
4118 | *home = p->pw_dir; | |
4119 | ||
d05c5031 LP |
4120 | if (shell) |
4121 | *shell = p->pw_shell; | |
4122 | ||
4b67834e LP |
4123 | return 0; |
4124 | } | |
4125 | ||
59164be4 LP |
4126 | char* uid_to_name(uid_t uid) { |
4127 | struct passwd *p; | |
4128 | char *r; | |
4129 | ||
4130 | if (uid == 0) | |
4131 | return strdup("root"); | |
4132 | ||
4133 | p = getpwuid(uid); | |
4134 | if (p) | |
4135 | return strdup(p->pw_name); | |
4136 | ||
4137 | if (asprintf(&r, "%lu", (unsigned long) uid) < 0) | |
4138 | return NULL; | |
4139 | ||
4140 | return r; | |
4141 | } | |
4142 | ||
4b67834e LP |
4143 | int get_group_creds(const char **groupname, gid_t *gid) { |
4144 | struct group *g; | |
4145 | gid_t id; | |
4146 | ||
4147 | assert(groupname); | |
4148 | ||
4149 | /* We enforce some special rules for gid=0: in order to avoid | |
4150 | * NSS lookups for root we hardcode its data. */ | |
4151 | ||
4152 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4153 | *groupname = "root"; | |
4154 | ||
4155 | if (gid) | |
4156 | *gid = 0; | |
4157 | ||
4158 | return 0; | |
4159 | } | |
4160 | ||
4161 | if (parse_gid(*groupname, &id) >= 0) { | |
4162 | errno = 0; | |
4163 | g = getgrgid(id); | |
4164 | ||
4165 | if (g) | |
4166 | *groupname = g->gr_name; | |
4167 | } else { | |
4168 | errno = 0; | |
4169 | g = getgrnam(*groupname); | |
4170 | } | |
4171 | ||
4172 | if (!g) | |
4173 | return errno != 0 ? -errno : -ESRCH; | |
4174 | ||
4175 | if (gid) | |
4176 | *gid = g->gr_gid; | |
4177 | ||
1cccf435 MV |
4178 | return 0; |
4179 | } | |
4180 | ||
43673799 LP |
4181 | int in_group(const char *name) { |
4182 | gid_t gid, *gids; | |
4183 | int ngroups_max, r, i; | |
4184 | ||
4185 | r = get_group_creds(&name, &gid); | |
4186 | if (r < 0) | |
4187 | return r; | |
4188 | ||
4189 | if (getgid() == gid) | |
4190 | return 1; | |
4191 | ||
4192 | if (getegid() == gid) | |
4193 | return 1; | |
4194 | ||
4195 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4196 | assert(ngroups_max > 0); | |
4197 | ||
4198 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4199 | ||
4200 | r = getgroups(ngroups_max, gids); | |
4201 | if (r < 0) | |
4202 | return -errno; | |
4203 | ||
4204 | for (i = 0; i < r; i++) | |
4205 | if (gids[i] == gid) | |
4206 | return 1; | |
4207 | ||
4208 | return 0; | |
4209 | } | |
4210 | ||
8092a428 LP |
4211 | int glob_exists(const char *path) { |
4212 | glob_t g; | |
4213 | int r, k; | |
4214 | ||
4215 | assert(path); | |
4216 | ||
4217 | zero(g); | |
4218 | errno = 0; | |
4219 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4220 | ||
4221 | if (k == GLOB_NOMATCH) | |
4222 | r = 0; | |
4223 | else if (k == GLOB_NOSPACE) | |
4224 | r = -ENOMEM; | |
4225 | else if (k == 0) | |
4226 | r = !strv_isempty(g.gl_pathv); | |
4227 | else | |
4228 | r = errno ? -errno : -EIO; | |
4229 | ||
4230 | globfree(&g); | |
4231 | ||
4232 | return r; | |
4233 | } | |
4234 | ||
83096483 LP |
4235 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4236 | struct stat st; | |
4237 | ||
4238 | assert(d); | |
4239 | assert(de); | |
4240 | ||
4241 | if (de->d_type != DT_UNKNOWN) | |
4242 | return 0; | |
4243 | ||
4244 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4245 | return -errno; | |
4246 | ||
4247 | de->d_type = | |
4248 | S_ISREG(st.st_mode) ? DT_REG : | |
4249 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4250 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4251 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4252 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4253 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4254 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4255 | DT_UNKNOWN; | |
4256 | ||
4257 | return 0; | |
4258 | } | |
4259 | ||
4260 | int in_search_path(const char *path, char **search) { | |
4261 | char **i, *parent; | |
4262 | int r; | |
4263 | ||
9eb977db | 4264 | r = path_get_parent(path, &parent); |
83096483 LP |
4265 | if (r < 0) |
4266 | return r; | |
4267 | ||
4268 | r = 0; | |
4269 | ||
4270 | STRV_FOREACH(i, search) { | |
4271 | if (path_equal(parent, *i)) { | |
4272 | r = 1; | |
4273 | break; | |
4274 | } | |
4275 | } | |
4276 | ||
4277 | free(parent); | |
4278 | ||
4279 | return r; | |
4280 | } | |
4281 | ||
034a2a52 LP |
4282 | int get_files_in_directory(const char *path, char ***list) { |
4283 | DIR *d; | |
4284 | int r = 0; | |
4285 | unsigned n = 0; | |
4286 | char **l = NULL; | |
4287 | ||
4288 | assert(path); | |
d60ef526 LP |
4289 | |
4290 | /* Returns all files in a directory in *list, and the number | |
4291 | * of files as return value. If list is NULL returns only the | |
4292 | * number */ | |
034a2a52 LP |
4293 | |
4294 | d = opendir(path); | |
8ea913b2 LP |
4295 | if (!d) |
4296 | return -errno; | |
4297 | ||
034a2a52 | 4298 | for (;;) { |
7d5e9c0f LP |
4299 | struct dirent *de; |
4300 | union dirent_storage buf; | |
034a2a52 LP |
4301 | int k; |
4302 | ||
7d5e9c0f | 4303 | k = readdir_r(d, &buf.de, &de); |
034a2a52 LP |
4304 | if (k != 0) { |
4305 | r = -k; | |
4306 | goto finish; | |
4307 | } | |
4308 | ||
4309 | if (!de) | |
4310 | break; | |
4311 | ||
4312 | dirent_ensure_type(d, de); | |
4313 | ||
4314 | if (!dirent_is_file(de)) | |
4315 | continue; | |
4316 | ||
d60ef526 LP |
4317 | if (list) { |
4318 | if ((unsigned) r >= n) { | |
4319 | char **t; | |
034a2a52 | 4320 | |
d60ef526 LP |
4321 | n = MAX(16, 2*r); |
4322 | t = realloc(l, sizeof(char*) * n); | |
4323 | if (!t) { | |
4324 | r = -ENOMEM; | |
4325 | goto finish; | |
4326 | } | |
034a2a52 | 4327 | |
d60ef526 LP |
4328 | l = t; |
4329 | } | |
034a2a52 | 4330 | |
d60ef526 | 4331 | assert((unsigned) r < n); |
034a2a52 | 4332 | |
d60ef526 LP |
4333 | l[r] = strdup(de->d_name); |
4334 | if (!l[r]) { | |
4335 | r = -ENOMEM; | |
4336 | goto finish; | |
4337 | } | |
034a2a52 | 4338 | |
d60ef526 LP |
4339 | l[++r] = NULL; |
4340 | } else | |
4341 | r++; | |
034a2a52 LP |
4342 | } |
4343 | ||
4344 | finish: | |
4345 | if (d) | |
4346 | closedir(d); | |
4347 | ||
d60ef526 LP |
4348 | if (r >= 0) { |
4349 | if (list) | |
4350 | *list = l; | |
4351 | } else | |
034a2a52 LP |
4352 | strv_free(l); |
4353 | ||
4354 | return r; | |
4355 | } | |
4356 | ||
b7def684 | 4357 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4358 | va_list ap; |
4359 | size_t l; | |
4360 | char *r, *p; | |
4361 | ||
4362 | va_start(ap, x); | |
4363 | ||
4364 | if (x) { | |
4365 | l = strlen(x); | |
4366 | ||
4367 | for (;;) { | |
4368 | const char *t; | |
040f18ea | 4369 | size_t n; |
911a4828 LP |
4370 | |
4371 | t = va_arg(ap, const char *); | |
4372 | if (!t) | |
4373 | break; | |
4374 | ||
040f18ea | 4375 | n = strlen(t); |
e98055de LN |
4376 | if (n > ((size_t) -1) - l) { |
4377 | va_end(ap); | |
040f18ea | 4378 | return NULL; |
e98055de | 4379 | } |
040f18ea LP |
4380 | |
4381 | l += n; | |
911a4828 LP |
4382 | } |
4383 | } else | |
4384 | l = 0; | |
4385 | ||
4386 | va_end(ap); | |
4387 | ||
4388 | r = new(char, l+1); | |
4389 | if (!r) | |
4390 | return NULL; | |
4391 | ||
4392 | if (x) { | |
4393 | p = stpcpy(r, x); | |
4394 | ||
4395 | va_start(ap, x); | |
4396 | ||
4397 | for (;;) { | |
4398 | const char *t; | |
4399 | ||
4400 | t = va_arg(ap, const char *); | |
4401 | if (!t) | |
4402 | break; | |
4403 | ||
4404 | p = stpcpy(p, t); | |
4405 | } | |
8ea913b2 LP |
4406 | |
4407 | va_end(ap); | |
911a4828 LP |
4408 | } else |
4409 | r[0] = 0; | |
4410 | ||
4411 | return r; | |
4412 | } | |
4413 | ||
b636465b LP |
4414 | bool is_main_thread(void) { |
4415 | static __thread int cached = 0; | |
4416 | ||
4417 | if (_unlikely_(cached == 0)) | |
4418 | cached = getpid() == gettid() ? 1 : -1; | |
4419 | ||
4420 | return cached > 0; | |
4421 | } | |
4422 | ||
94959f0f LP |
4423 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4424 | char *p, *s; | |
4425 | int r; | |
4426 | unsigned n, m; | |
4427 | ||
4428 | assert(ret); | |
4429 | ||
4430 | /* If it has a queue this is good enough for us */ | |
4431 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4432 | return -ENOMEM; | |
4433 | ||
4434 | r = access(p, F_OK); | |
4435 | free(p); | |
4436 | ||
4437 | if (r >= 0) { | |
4438 | *ret = d; | |
4439 | return 0; | |
4440 | } | |
4441 | ||
4442 | /* If it is a partition find the originating device */ | |
4443 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4444 | return -ENOMEM; | |
4445 | ||
4446 | r = access(p, F_OK); | |
4447 | free(p); | |
4448 | ||
4449 | if (r < 0) | |
4450 | return -ENOENT; | |
4451 | ||
4452 | /* Get parent dev_t */ | |
4453 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4454 | return -ENOMEM; | |
4455 | ||
4456 | r = read_one_line_file(p, &s); | |
4457 | free(p); | |
4458 | ||
4459 | if (r < 0) | |
4460 | return r; | |
4461 | ||
4462 | r = sscanf(s, "%u:%u", &m, &n); | |
4463 | free(s); | |
4464 | ||
4465 | if (r != 2) | |
4466 | return -EINVAL; | |
4467 | ||
4468 | /* Only return this if it is really good enough for us. */ | |
4469 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4470 | return -ENOMEM; | |
4471 | ||
4472 | r = access(p, F_OK); | |
4473 | free(p); | |
4474 | ||
4475 | if (r >= 0) { | |
4476 | *ret = makedev(m, n); | |
4477 | return 0; | |
4478 | } | |
4479 | ||
4480 | return -ENOENT; | |
4481 | } | |
4482 | ||
8d53b453 | 4483 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4484 | struct stat st; |
4485 | ||
4486 | assert(p); | |
4487 | ||
4488 | if (lstat(p, &st) < 0) | |
4489 | return -errno; | |
4490 | ||
4491 | return | |
8d53b453 | 4492 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4493 | (st.st_mode & S_ISVTX); |
4494 | } | |
94959f0f | 4495 | |
f41607a6 LP |
4496 | static const char *const ioprio_class_table[] = { |
4497 | [IOPRIO_CLASS_NONE] = "none", | |
4498 | [IOPRIO_CLASS_RT] = "realtime", | |
4499 | [IOPRIO_CLASS_BE] = "best-effort", | |
4500 | [IOPRIO_CLASS_IDLE] = "idle" | |
4501 | }; | |
4502 | ||
f8b69d1d | 4503 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4504 | |
4505 | static const char *const sigchld_code_table[] = { | |
4506 | [CLD_EXITED] = "exited", | |
4507 | [CLD_KILLED] = "killed", | |
4508 | [CLD_DUMPED] = "dumped", | |
4509 | [CLD_TRAPPED] = "trapped", | |
4510 | [CLD_STOPPED] = "stopped", | |
4511 | [CLD_CONTINUED] = "continued", | |
4512 | }; | |
4513 | ||
4514 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4515 | ||
4516 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4517 | [LOG_FAC(LOG_KERN)] = "kern", | |
4518 | [LOG_FAC(LOG_USER)] = "user", | |
4519 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4520 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4521 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4522 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4523 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4524 | [LOG_FAC(LOG_NEWS)] = "news", | |
4525 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4526 | [LOG_FAC(LOG_CRON)] = "cron", | |
4527 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4528 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4529 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4530 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4531 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4532 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4533 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4534 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4535 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4536 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4537 | }; | |
4538 | ||
f8b69d1d | 4539 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4540 | |
4541 | static const char *const log_level_table[] = { | |
4542 | [LOG_EMERG] = "emerg", | |
4543 | [LOG_ALERT] = "alert", | |
4544 | [LOG_CRIT] = "crit", | |
4545 | [LOG_ERR] = "err", | |
4546 | [LOG_WARNING] = "warning", | |
4547 | [LOG_NOTICE] = "notice", | |
4548 | [LOG_INFO] = "info", | |
4549 | [LOG_DEBUG] = "debug" | |
4550 | }; | |
4551 | ||
f8b69d1d | 4552 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4553 | |
4554 | static const char* const sched_policy_table[] = { | |
4555 | [SCHED_OTHER] = "other", | |
4556 | [SCHED_BATCH] = "batch", | |
4557 | [SCHED_IDLE] = "idle", | |
4558 | [SCHED_FIFO] = "fifo", | |
4559 | [SCHED_RR] = "rr" | |
4560 | }; | |
4561 | ||
f8b69d1d | 4562 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 LP |
4563 | |
4564 | static const char* const rlimit_table[] = { | |
4565 | [RLIMIT_CPU] = "LimitCPU", | |
4566 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4567 | [RLIMIT_DATA] = "LimitDATA", | |
4568 | [RLIMIT_STACK] = "LimitSTACK", | |
4569 | [RLIMIT_CORE] = "LimitCORE", | |
4570 | [RLIMIT_RSS] = "LimitRSS", | |
4571 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4572 | [RLIMIT_AS] = "LimitAS", | |
4573 | [RLIMIT_NPROC] = "LimitNPROC", | |
4574 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4575 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4576 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4577 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4578 | [RLIMIT_NICE] = "LimitNICE", | |
4579 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4580 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4581 | }; | |
4582 | ||
4583 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4584 | ||
4585 | static const char* const ip_tos_table[] = { | |
4586 | [IPTOS_LOWDELAY] = "low-delay", | |
4587 | [IPTOS_THROUGHPUT] = "throughput", | |
4588 | [IPTOS_RELIABILITY] = "reliability", | |
4589 | [IPTOS_LOWCOST] = "low-cost", | |
4590 | }; | |
4591 | ||
f8b69d1d | 4592 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4593 | |
4e240ab0 | 4594 | static const char *const __signal_table[] = { |
f41607a6 LP |
4595 | [SIGHUP] = "HUP", |
4596 | [SIGINT] = "INT", | |
4597 | [SIGQUIT] = "QUIT", | |
4598 | [SIGILL] = "ILL", | |
4599 | [SIGTRAP] = "TRAP", | |
4600 | [SIGABRT] = "ABRT", | |
4601 | [SIGBUS] = "BUS", | |
4602 | [SIGFPE] = "FPE", | |
4603 | [SIGKILL] = "KILL", | |
4604 | [SIGUSR1] = "USR1", | |
4605 | [SIGSEGV] = "SEGV", | |
4606 | [SIGUSR2] = "USR2", | |
4607 | [SIGPIPE] = "PIPE", | |
4608 | [SIGALRM] = "ALRM", | |
4609 | [SIGTERM] = "TERM", | |
4610 | #ifdef SIGSTKFLT | |
4611 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4612 | #endif | |
4613 | [SIGCHLD] = "CHLD", | |
4614 | [SIGCONT] = "CONT", | |
4615 | [SIGSTOP] = "STOP", | |
4616 | [SIGTSTP] = "TSTP", | |
4617 | [SIGTTIN] = "TTIN", | |
4618 | [SIGTTOU] = "TTOU", | |
4619 | [SIGURG] = "URG", | |
4620 | [SIGXCPU] = "XCPU", | |
4621 | [SIGXFSZ] = "XFSZ", | |
4622 | [SIGVTALRM] = "VTALRM", | |
4623 | [SIGPROF] = "PROF", | |
4624 | [SIGWINCH] = "WINCH", | |
4625 | [SIGIO] = "IO", | |
4626 | [SIGPWR] = "PWR", | |
4627 | [SIGSYS] = "SYS" | |
4628 | }; | |
4629 | ||
4e240ab0 MS |
4630 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4631 | ||
4632 | const char *signal_to_string(int signo) { | |
4633 | static __thread char buf[12]; | |
4634 | const char *name; | |
4635 | ||
4636 | name = __signal_to_string(signo); | |
4637 | if (name) | |
4638 | return name; | |
4639 | ||
4640 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
4641 | snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN); | |
4642 | else | |
4643 | snprintf(buf, sizeof(buf) - 1, "%d", signo); | |
4644 | char_array_0(buf); | |
4645 | return buf; | |
4646 | } | |
4647 | ||
4648 | int signal_from_string(const char *s) { | |
4649 | int signo; | |
4650 | int offset = 0; | |
4651 | unsigned u; | |
4652 | ||
040f18ea | 4653 | signo = __signal_from_string(s); |
4e240ab0 MS |
4654 | if (signo > 0) |
4655 | return signo; | |
4656 | ||
4657 | if (startswith(s, "RTMIN+")) { | |
4658 | s += 6; | |
4659 | offset = SIGRTMIN; | |
4660 | } | |
4661 | if (safe_atou(s, &u) >= 0) { | |
4662 | signo = (int) u + offset; | |
4663 | if (signo > 0 && signo < _NSIG) | |
4664 | return signo; | |
4665 | } | |
4666 | return -1; | |
4667 | } | |
65457142 FC |
4668 | |
4669 | bool kexec_loaded(void) { | |
4670 | bool loaded = false; | |
4671 | char *s; | |
4672 | ||
4673 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
4674 | if (s[0] == '1') | |
4675 | loaded = true; | |
4676 | free(s); | |
4677 | } | |
4678 | return loaded; | |
4679 | } | |
fb9de93d LP |
4680 | |
4681 | int strdup_or_null(const char *a, char **b) { | |
4682 | char *c; | |
4683 | ||
4684 | assert(b); | |
4685 | ||
4686 | if (!a) { | |
4687 | *b = NULL; | |
4688 | return 0; | |
4689 | } | |
4690 | ||
4691 | c = strdup(a); | |
4692 | if (!c) | |
4693 | return -ENOMEM; | |
4694 | ||
4695 | *b = c; | |
4696 | return 0; | |
4697 | } | |
64685e0c | 4698 | |
87d2c1ff LP |
4699 | int prot_from_flags(int flags) { |
4700 | ||
4701 | switch (flags & O_ACCMODE) { | |
4702 | ||
4703 | case O_RDONLY: | |
4704 | return PROT_READ; | |
4705 | ||
4706 | case O_WRONLY: | |
4707 | return PROT_WRITE; | |
4708 | ||
4709 | case O_RDWR: | |
4710 | return PROT_READ|PROT_WRITE; | |
4711 | ||
4712 | default: | |
4713 | return -EINVAL; | |
4714 | } | |
7c99e0c1 | 4715 | } |
689b9a22 | 4716 | |
babfc091 | 4717 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 4718 | unsigned i; |
babfc091 LP |
4719 | |
4720 | static const struct { | |
4721 | const char *suffix; | |
4722 | off_t factor; | |
4723 | } table[] = { | |
32895bb3 LP |
4724 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
4725 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
4726 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
4727 | { "G", 1024ULL*1024ULL*1024ULL }, | |
4728 | { "M", 1024ULL*1024ULL }, | |
4729 | { "K", 1024ULL }, | |
4730 | }; | |
4731 | ||
4732 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
4733 | ||
4734 | if (t >= table[i].factor) { | |
4735 | snprintf(buf, l, | |
4736 | "%llu.%llu%s", | |
4737 | (unsigned long long) (t / table[i].factor), | |
4738 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
4739 | table[i].suffix); | |
4740 | ||
4741 | goto finish; | |
4742 | } | |
4743 | } | |
4744 | ||
4745 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
4746 | ||
4747 | finish: | |
4748 | buf[l-1] = 0; | |
4749 | return buf; | |
4750 | ||
4751 | } | |
55d7bfc1 LP |
4752 | |
4753 | void* memdup(const void *p, size_t l) { | |
4754 | void *r; | |
4755 | ||
4756 | assert(p); | |
4757 | ||
4758 | r = malloc(l); | |
4759 | if (!r) | |
4760 | return NULL; | |
4761 | ||
4762 | memcpy(r, p, l); | |
4763 | return r; | |
4764 | } | |
bb99a35a LP |
4765 | |
4766 | int fd_inc_sndbuf(int fd, size_t n) { | |
4767 | int r, value; | |
4768 | socklen_t l = sizeof(value); | |
4769 | ||
4770 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
4771 | if (r >= 0 && | |
4772 | l == sizeof(value) && | |
4773 | (size_t) value >= n*2) | |
4774 | return 0; | |
4775 | ||
4776 | value = (int) n; | |
4777 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
4778 | if (r < 0) | |
4779 | return -errno; | |
4780 | ||
4781 | return 1; | |
4782 | } | |
4783 | ||
4784 | int fd_inc_rcvbuf(int fd, size_t n) { | |
4785 | int r, value; | |
4786 | socklen_t l = sizeof(value); | |
4787 | ||
4788 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
4789 | if (r >= 0 && | |
4790 | l == sizeof(value) && | |
4791 | (size_t) value >= n*2) | |
4792 | return 0; | |
4793 | ||
4794 | value = (int) n; | |
4795 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
4796 | if (r < 0) | |
4797 | return -errno; | |
4798 | ||
4799 | return 1; | |
4800 | } | |
6bb92a16 | 4801 | |
9bdc770c | 4802 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
4803 | pid_t parent_pid, agent_pid; |
4804 | int fd; | |
4805 | bool stdout_is_tty, stderr_is_tty; | |
4806 | unsigned n, i; | |
4807 | va_list ap; | |
4808 | char **l; | |
4809 | ||
4810 | assert(pid); | |
4811 | assert(path); | |
4812 | ||
4813 | parent_pid = getpid(); | |
4814 | ||
4815 | /* Spawns a temporary TTY agent, making sure it goes away when | |
4816 | * we go away */ | |
4817 | ||
4818 | agent_pid = fork(); | |
4819 | if (agent_pid < 0) | |
4820 | return -errno; | |
4821 | ||
4822 | if (agent_pid != 0) { | |
4823 | *pid = agent_pid; | |
4824 | return 0; | |
4825 | } | |
4826 | ||
4827 | /* In the child: | |
4828 | * | |
4829 | * Make sure the agent goes away when the parent dies */ | |
4830 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
4831 | _exit(EXIT_FAILURE); | |
4832 | ||
4833 | /* Check whether our parent died before we were able | |
4834 | * to set the death signal */ | |
4835 | if (getppid() != parent_pid) | |
4836 | _exit(EXIT_SUCCESS); | |
4837 | ||
4838 | /* Don't leak fds to the agent */ | |
9bdc770c | 4839 | close_all_fds(except, n_except); |
6bb92a16 LP |
4840 | |
4841 | stdout_is_tty = isatty(STDOUT_FILENO); | |
4842 | stderr_is_tty = isatty(STDERR_FILENO); | |
4843 | ||
4844 | if (!stdout_is_tty || !stderr_is_tty) { | |
4845 | /* Detach from stdout/stderr. and reopen | |
4846 | * /dev/tty for them. This is important to | |
4847 | * ensure that when systemctl is started via | |
4848 | * popen() or a similar call that expects to | |
4849 | * read EOF we actually do generate EOF and | |
4850 | * not delay this indefinitely by because we | |
4851 | * keep an unused copy of stdin around. */ | |
4852 | fd = open("/dev/tty", O_WRONLY); | |
4853 | if (fd < 0) { | |
4854 | log_error("Failed to open /dev/tty: %m"); | |
4855 | _exit(EXIT_FAILURE); | |
4856 | } | |
4857 | ||
4858 | if (!stdout_is_tty) | |
4859 | dup2(fd, STDOUT_FILENO); | |
4860 | ||
4861 | if (!stderr_is_tty) | |
4862 | dup2(fd, STDERR_FILENO); | |
4863 | ||
4864 | if (fd > 2) | |
4865 | close(fd); | |
4866 | } | |
4867 | ||
4868 | /* Count arguments */ | |
4869 | va_start(ap, path); | |
4870 | for (n = 0; va_arg(ap, char*); n++) | |
4871 | ; | |
4872 | va_end(ap); | |
4873 | ||
4874 | /* Allocate strv */ | |
4875 | l = alloca(sizeof(char *) * (n + 1)); | |
4876 | ||
4877 | /* Fill in arguments */ | |
4878 | va_start(ap, path); | |
4879 | for (i = 0; i <= n; i++) | |
4880 | l[i] = va_arg(ap, char*); | |
4881 | va_end(ap); | |
4882 | ||
4883 | execv(path, l); | |
4884 | _exit(EXIT_FAILURE); | |
4885 | } | |
68faf98c LP |
4886 | |
4887 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
4888 | struct rlimit highest, fixed; | |
4889 | ||
4890 | assert(rlim); | |
4891 | ||
4892 | if (setrlimit(resource, rlim) >= 0) | |
4893 | return 0; | |
4894 | ||
4895 | if (errno != EPERM) | |
4896 | return -errno; | |
4897 | ||
4898 | /* So we failed to set the desired setrlimit, then let's try | |
4899 | * to get as close as we can */ | |
4900 | assert_se(getrlimit(resource, &highest) == 0); | |
4901 | ||
4902 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
4903 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
4904 | ||
4905 | if (setrlimit(resource, &fixed) < 0) | |
4906 | return -errno; | |
4907 | ||
4908 | return 0; | |
4909 | } | |
3d9a4122 | 4910 | |
ab94af92 LP |
4911 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
4912 | char path[sizeof("/proc/")-1+10+sizeof("/environ")], *value = NULL; | |
4913 | int r; | |
4914 | FILE *f; | |
4915 | bool done = false; | |
4916 | size_t l; | |
4917 | ||
4918 | assert(field); | |
4919 | assert(_value); | |
4920 | ||
4921 | if (pid == 0) | |
4922 | pid = getpid(); | |
4923 | ||
4924 | snprintf(path, sizeof(path), "/proc/%lu/environ", (unsigned long) pid); | |
4925 | char_array_0(path); | |
4926 | ||
4927 | f = fopen(path, "re"); | |
4928 | if (!f) | |
4929 | return -errno; | |
4930 | ||
4931 | l = strlen(field); | |
4932 | r = 0; | |
4933 | ||
4934 | do { | |
4935 | char line[LINE_MAX]; | |
4936 | unsigned i; | |
4937 | ||
4938 | for (i = 0; i < sizeof(line)-1; i++) { | |
4939 | int c; | |
4940 | ||
4941 | c = getc(f); | |
4942 | if (_unlikely_(c == EOF)) { | |
4943 | done = true; | |
4944 | break; | |
4945 | } else if (c == 0) | |
4946 | break; | |
4947 | ||
4948 | line[i] = c; | |
4949 | } | |
4950 | line[i] = 0; | |
4951 | ||
4952 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
4953 | value = strdup(line + l + 1); | |
4954 | if (!value) { | |
4955 | r = -ENOMEM; | |
4956 | break; | |
4957 | } | |
4958 | ||
4959 | r = 1; | |
4960 | break; | |
4961 | } | |
4962 | ||
4963 | } while (!done); | |
4964 | ||
4965 | fclose(f); | |
4966 | ||
4967 | if (r >= 0) | |
4968 | *_value = value; | |
4969 | ||
4970 | return r; | |
4971 | } | |
d889a206 LP |
4972 | |
4973 | int can_sleep(const char *type) { | |
e67f47e5 | 4974 | char *w, *state; |
d889a206 | 4975 | size_t l, k; |
d889a206 | 4976 | int r; |
e67f47e5 | 4977 | _cleanup_free_ char *p = NULL; |
d889a206 LP |
4978 | |
4979 | assert(type); | |
4980 | ||
679b7d79 LP |
4981 | /* If /sys is read-only we cannot sleep */ |
4982 | if (access("/sys/power/state", W_OK) < 0) | |
4983 | return false; | |
4984 | ||
d889a206 LP |
4985 | r = read_one_line_file("/sys/power/state", &p); |
4986 | if (r < 0) | |
679b7d79 | 4987 | return false; |
d889a206 LP |
4988 | |
4989 | k = strlen(type); | |
e67f47e5 LP |
4990 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) |
4991 | if (l == k && memcmp(w, type, l) == 0) | |
4992 | return true; | |
d889a206 | 4993 | |
e67f47e5 | 4994 | return false; |
d889a206 | 4995 | } |
49dbfa7b | 4996 | |
6524990f LP |
4997 | int can_sleep_disk(const char *type) { |
4998 | char *w, *state; | |
4999 | size_t l, k; | |
5000 | int r; | |
5001 | _cleanup_free_ char *p = NULL; | |
5002 | ||
5003 | assert(type); | |
5004 | ||
679b7d79 LP |
5005 | /* If /sys is read-only we cannot sleep */ |
5006 | if (access("/sys/power/state", W_OK) < 0 || | |
5007 | access("/sys/power/disk", W_OK) < 0) | |
5008 | return false; | |
5009 | ||
6524990f LP |
5010 | r = read_one_line_file("/sys/power/disk", &p); |
5011 | if (r < 0) | |
679b7d79 | 5012 | return false; |
6524990f LP |
5013 | |
5014 | k = strlen(type); | |
5015 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) { | |
5016 | if (l == k && memcmp(w, type, l) == 0) | |
5017 | return true; | |
5018 | ||
5019 | if (l == k + 2 && w[0] == '[' && memcmp(w + 1, type, l - 2) == 0 && w[l-1] == ']') | |
5020 | return true; | |
5021 | } | |
5022 | ||
5023 | return false; | |
5024 | } | |
5025 | ||
49dbfa7b LP |
5026 | bool is_valid_documentation_url(const char *url) { |
5027 | assert(url); | |
5028 | ||
5029 | if (startswith(url, "http://") && url[7]) | |
5030 | return true; | |
5031 | ||
5032 | if (startswith(url, "https://") && url[8]) | |
5033 | return true; | |
5034 | ||
5035 | if (startswith(url, "file:") && url[5]) | |
5036 | return true; | |
5037 | ||
5038 | if (startswith(url, "info:") && url[5]) | |
5039 | return true; | |
5040 | ||
5041 | if (startswith(url, "man:") && url[4]) | |
5042 | return true; | |
5043 | ||
5044 | return false; | |
5045 | } | |
9be346c9 HH |
5046 | |
5047 | bool in_initrd(void) { | |
a05f97b3 | 5048 | static __thread int saved = -1; |
825c6fe5 | 5049 | struct statfs s; |
8f33b5b8 | 5050 | |
825c6fe5 LP |
5051 | if (saved >= 0) |
5052 | return saved; | |
5053 | ||
5054 | /* We make two checks here: | |
5055 | * | |
5056 | * 1. the flag file /etc/initrd-release must exist | |
5057 | * 2. the root file system must be a memory file system | |
5058 | * | |
5059 | * The second check is extra paranoia, since misdetecting an | |
5060 | * initrd can have bad bad consequences due the initrd | |
5061 | * emptying when transititioning to the main systemd. | |
5062 | */ | |
5063 | ||
5064 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5065 | statfs("/", &s) >= 0 && | |
943aad8c | 5066 | is_temporary_fs(&s); |
9be346c9 | 5067 | |
8f33b5b8 | 5068 | return saved; |
9be346c9 | 5069 | } |
069cfc85 LP |
5070 | |
5071 | void warn_melody(void) { | |
e67f47e5 | 5072 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5073 | |
5074 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5075 | if (fd < 0) | |
5076 | return; | |
5077 | ||
040f18ea | 5078 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5079 | |
5080 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5081 | usleep(125*USEC_PER_MSEC); | |
5082 | ||
5083 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5084 | usleep(125*USEC_PER_MSEC); | |
5085 | ||
5086 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5087 | usleep(125*USEC_PER_MSEC); | |
5088 | ||
5089 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5090 | } |
cd3bd60a LP |
5091 | |
5092 | int make_console_stdio(void) { | |
5093 | int fd, r; | |
5094 | ||
5095 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5096 | ||
5097 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5098 | if (fd < 0) { | |
5099 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5100 | return fd; | |
5101 | } | |
5102 | ||
5103 | r = make_stdio(fd); | |
5104 | if (r < 0) { | |
5105 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5106 | return r; | |
5107 | } | |
5108 | ||
5109 | return 0; | |
5110 | } | |
7c5f152a LP |
5111 | |
5112 | int get_home_dir(char **_h) { | |
5113 | char *h; | |
5114 | const char *e; | |
5115 | uid_t u; | |
5116 | struct passwd *p; | |
5117 | ||
5118 | assert(_h); | |
5119 | ||
5120 | /* Take the user specified one */ | |
5121 | e = getenv("HOME"); | |
5122 | if (e) { | |
5123 | h = strdup(e); | |
5124 | if (!h) | |
5125 | return -ENOMEM; | |
5126 | ||
5127 | *_h = h; | |
5128 | return 0; | |
5129 | } | |
5130 | ||
5131 | /* Hardcode home directory for root to avoid NSS */ | |
5132 | u = getuid(); | |
5133 | if (u == 0) { | |
5134 | h = strdup("/root"); | |
5135 | if (!h) | |
5136 | return -ENOMEM; | |
5137 | ||
5138 | *_h = h; | |
5139 | return 0; | |
5140 | } | |
5141 | ||
5142 | /* Check the database... */ | |
5143 | errno = 0; | |
5144 | p = getpwuid(u); | |
5145 | if (!p) | |
e67f47e5 | 5146 | return errno ? -errno : -ESRCH; |
7c5f152a LP |
5147 | |
5148 | if (!path_is_absolute(p->pw_dir)) | |
5149 | return -EINVAL; | |
5150 | ||
5151 | h = strdup(p->pw_dir); | |
5152 | if (!h) | |
5153 | return -ENOMEM; | |
5154 | ||
5155 | *_h = h; | |
5156 | return 0; | |
5157 | } | |
5158 | ||
5159 | int get_shell(char **_sh) { | |
5160 | char *sh; | |
5161 | const char *e; | |
5162 | uid_t u; | |
5163 | struct passwd *p; | |
5164 | ||
5165 | assert(_sh); | |
5166 | ||
5167 | /* Take the user specified one */ | |
5168 | e = getenv("SHELL"); | |
5169 | if (e) { | |
5170 | sh = strdup(e); | |
5171 | if (!sh) | |
5172 | return -ENOMEM; | |
5173 | ||
5174 | *_sh = sh; | |
5175 | return 0; | |
5176 | } | |
5177 | ||
5178 | /* Hardcode home directory for root to avoid NSS */ | |
5179 | u = getuid(); | |
5180 | if (u == 0) { | |
5181 | sh = strdup("/bin/sh"); | |
5182 | if (!sh) | |
5183 | return -ENOMEM; | |
5184 | ||
5185 | *_sh = sh; | |
5186 | return 0; | |
5187 | } | |
5188 | ||
5189 | /* Check the database... */ | |
5190 | errno = 0; | |
5191 | p = getpwuid(u); | |
5192 | if (!p) | |
5193 | return errno ? -errno : -ESRCH; | |
5194 | ||
5195 | if (!path_is_absolute(p->pw_shell)) | |
5196 | return -EINVAL; | |
5197 | ||
5198 | sh = strdup(p->pw_shell); | |
5199 | if (!sh) | |
5200 | return -ENOMEM; | |
5201 | ||
5202 | *_sh = sh; | |
5203 | return 0; | |
5204 | } | |
2fbe635a LP |
5205 | |
5206 | void freep(void *p) { | |
5207 | free(*(void**) p); | |
5208 | } | |
5209 | ||
5210 | void fclosep(FILE **f) { | |
5211 | if (*f) | |
5212 | fclose(*f); | |
5213 | } | |
e67f47e5 | 5214 | |
e985665d ZJS |
5215 | void pclosep(FILE **f) { |
5216 | if (*f) | |
5217 | pclose(*f); | |
5218 | } | |
5219 | ||
e67f47e5 LP |
5220 | void closep(int *fd) { |
5221 | if (*fd >= 0) | |
5222 | close_nointr_nofail(*fd); | |
5223 | } | |
a05f97b3 LP |
5224 | |
5225 | void closedirp(DIR **d) { | |
5226 | if (*d) | |
5227 | closedir(*d); | |
5228 | } | |
25ea79fe ZJS |
5229 | |
5230 | void umaskp(mode_t *u) { | |
5231 | umask(*u); | |
5232 | } | |
0b507b17 LP |
5233 | |
5234 | bool filename_is_safe(const char *p) { | |
5235 | ||
5236 | if (isempty(p)) | |
5237 | return false; | |
5238 | ||
5239 | if (strchr(p, '/')) | |
5240 | return false; | |
5241 | ||
5242 | if (streq(p, ".")) | |
5243 | return false; | |
5244 | ||
5245 | if (streq(p, "..")) | |
5246 | return false; | |
5247 | ||
5248 | if (strlen(p) > FILENAME_MAX) | |
5249 | return false; | |
5250 | ||
5251 | return true; | |
5252 | } | |
5253 | ||
5254 | bool string_is_safe(const char *p) { | |
5255 | const char *t; | |
5256 | ||
5257 | assert(p); | |
5258 | ||
5259 | for (t = p; *t; t++) { | |
01539d6e | 5260 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5261 | return false; |
5262 | ||
011afa76 | 5263 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5264 | return false; |
5265 | } | |
5266 | ||
5267 | return true; | |
5268 | } | |
cfbc22ab | 5269 | |
4d1a6904 LP |
5270 | bool string_has_cc(const char *p) { |
5271 | const char *t; | |
5272 | ||
5273 | assert(p); | |
5274 | ||
5275 | for (t = p; *t; t++) | |
5276 | if (*t > 0 && *t < ' ') | |
5277 | return true; | |
5278 | ||
5279 | return false; | |
5280 | } | |
5281 | ||
e884315e LP |
5282 | bool path_is_safe(const char *p) { |
5283 | ||
5284 | if (isempty(p)) | |
5285 | return false; | |
5286 | ||
5287 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5288 | return false; | |
5289 | ||
5290 | if (strlen(p) > PATH_MAX) | |
5291 | return false; | |
5292 | ||
5293 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5294 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5295 | return false; | |
5296 | ||
5297 | if (strstr(p, "//")) | |
5298 | return false; | |
5299 | ||
5300 | return true; | |
5301 | } | |
5302 | ||
a9e12476 KS |
5303 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5304 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5305 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5306 | size_t l, u, idx; |
5307 | const void *p; | |
5308 | int comparison; | |
5309 | ||
5310 | l = 0; | |
5311 | u = nmemb; | |
5312 | while (l < u) { | |
5313 | idx = (l + u) / 2; | |
5314 | p = (void *)(((const char *) base) + (idx * size)); | |
5315 | comparison = compar(key, p, arg); | |
5316 | if (comparison < 0) | |
5317 | u = idx; | |
5318 | else if (comparison > 0) | |
5319 | l = idx + 1; | |
5320 | else | |
5321 | return (void *)p; | |
5322 | } | |
5323 | return NULL; | |
5324 | } | |
09017585 MS |
5325 | |
5326 | bool is_locale_utf8(void) { | |
5327 | const char *set; | |
5328 | static int cached_answer = -1; | |
5329 | ||
5330 | if (cached_answer >= 0) | |
5331 | goto out; | |
5332 | ||
5333 | if (!setlocale(LC_ALL, "")) { | |
5334 | cached_answer = true; | |
5335 | goto out; | |
5336 | } | |
5337 | ||
5338 | set = nl_langinfo(CODESET); | |
5339 | if (!set) { | |
5340 | cached_answer = true; | |
5341 | goto out; | |
5342 | } | |
5343 | ||
5344 | cached_answer = streq(set, "UTF-8"); | |
5345 | out: | |
5346 | return (bool)cached_answer; | |
5347 | } | |
c339d977 MS |
5348 | |
5349 | const char *draw_special_char(DrawSpecialChar ch) { | |
5350 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
5351 | /* UTF-8 */ { | |
45a5ff0d MS |
5352 | [DRAW_TREE_VERT] = "\342\224\202 ", /* │ */ |
5353 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ | |
5354 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5355 | [DRAW_TREE_SPACE] = " ", /* */ |
45a5ff0d | 5356 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243 ", /* ‣ */ |
c339d977 MS |
5357 | }, |
5358 | /* ASCII fallback */ { | |
45a5ff0d MS |
5359 | [DRAW_TREE_VERT] = "| ", |
5360 | [DRAW_TREE_BRANCH] = "|-", | |
5361 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5362 | [DRAW_TREE_SPACE] = " ", |
45a5ff0d | 5363 | [DRAW_TRIANGULAR_BULLET] = "> ", |
c339d977 MS |
5364 | } |
5365 | }; | |
5366 | ||
5367 | return draw_table[!is_locale_utf8()][ch]; | |
5368 | } | |
409bc9c3 LP |
5369 | |
5370 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5371 | const char *f; | |
5372 | char *t, *r; | |
5373 | size_t l, old_len, new_len; | |
5374 | ||
5375 | assert(text); | |
5376 | assert(old_string); | |
5377 | assert(new_string); | |
5378 | ||
5379 | old_len = strlen(old_string); | |
5380 | new_len = strlen(new_string); | |
5381 | ||
5382 | l = strlen(text); | |
5383 | r = new(char, l+1); | |
5384 | if (!r) | |
5385 | return NULL; | |
5386 | ||
5387 | f = text; | |
5388 | t = r; | |
5389 | while (*f) { | |
5390 | char *a; | |
5391 | size_t d, nl; | |
5392 | ||
5393 | if (!startswith(f, old_string)) { | |
5394 | *(t++) = *(f++); | |
5395 | continue; | |
5396 | } | |
5397 | ||
5398 | d = t - r; | |
5399 | nl = l - old_len + new_len; | |
5400 | a = realloc(r, nl + 1); | |
5401 | if (!a) | |
5402 | goto oom; | |
5403 | ||
5404 | l = nl; | |
5405 | r = a; | |
5406 | t = r + d; | |
5407 | ||
5408 | t = stpcpy(t, new_string); | |
5409 | f += old_len; | |
5410 | } | |
5411 | ||
5412 | *t = 0; | |
5413 | return r; | |
5414 | ||
5415 | oom: | |
5416 | free(r); | |
5417 | return NULL; | |
5418 | } | |
e8bc0ea2 LP |
5419 | |
5420 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5421 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5422 | enum { |
5423 | STATE_OTHER, | |
5424 | STATE_ESCAPE, | |
5425 | STATE_BRACKET | |
5426 | } state = STATE_OTHER; | |
5427 | char *obuf = NULL; | |
5428 | size_t osz = 0, isz; | |
5429 | FILE *f; | |
5430 | ||
5431 | assert(ibuf); | |
5432 | assert(*ibuf); | |
5433 | ||
5434 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5435 | ||
5436 | isz = _isz ? *_isz : strlen(*ibuf); | |
5437 | ||
5438 | f = open_memstream(&obuf, &osz); | |
5439 | if (!f) | |
5440 | return NULL; | |
5441 | ||
5442 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5443 | ||
5444 | switch (state) { | |
5445 | ||
5446 | case STATE_OTHER: | |
5447 | if (i >= *ibuf + isz) /* EOT */ | |
5448 | break; | |
5449 | else if (*i == '\x1B') | |
5450 | state = STATE_ESCAPE; | |
5451 | else if (*i == '\t') | |
5452 | fputs(" ", f); | |
5453 | else | |
5454 | fputc(*i, f); | |
5455 | break; | |
5456 | ||
5457 | case STATE_ESCAPE: | |
5458 | if (i >= *ibuf + isz) { /* EOT */ | |
5459 | fputc('\x1B', f); | |
5460 | break; | |
5461 | } else if (*i == '[') { | |
5462 | state = STATE_BRACKET; | |
5463 | begin = i + 1; | |
5464 | } else { | |
5465 | fputc('\x1B', f); | |
5466 | fputc(*i, f); | |
5467 | state = STATE_OTHER; | |
5468 | } | |
5469 | ||
5470 | break; | |
5471 | ||
5472 | case STATE_BRACKET: | |
5473 | ||
5474 | if (i >= *ibuf + isz || /* EOT */ | |
5475 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5476 | fputc('\x1B', f); | |
5477 | fputc('[', f); | |
5478 | state = STATE_OTHER; | |
5479 | i = begin-1; | |
5480 | } else if (*i == 'm') | |
5481 | state = STATE_OTHER; | |
5482 | break; | |
5483 | } | |
5484 | } | |
5485 | ||
5486 | if (ferror(f)) { | |
5487 | fclose(f); | |
5488 | free(obuf); | |
5489 | return NULL; | |
5490 | } | |
5491 | ||
5492 | fclose(f); | |
5493 | ||
5494 | free(*ibuf); | |
5495 | *ibuf = obuf; | |
5496 | ||
5497 | if (_isz) | |
5498 | *_isz = osz; | |
5499 | ||
5500 | return obuf; | |
5501 | } | |
240dbaa4 LP |
5502 | |
5503 | int on_ac_power(void) { | |
5504 | bool found_offline = false, found_online = false; | |
5505 | _cleanup_closedir_ DIR *d = NULL; | |
5506 | ||
5507 | d = opendir("/sys/class/power_supply"); | |
5508 | if (!d) | |
5509 | return -errno; | |
5510 | ||
5511 | for (;;) { | |
5512 | struct dirent *de; | |
5513 | union dirent_storage buf; | |
5514 | _cleanup_free_ char *p = NULL; | |
5515 | _cleanup_close_ int fd = -1, device = -1; | |
5516 | char contents[6]; | |
5517 | ssize_t n; | |
5518 | int k; | |
5519 | ||
5520 | k = readdir_r(d, &buf.de, &de); | |
5521 | if (k != 0) | |
5522 | return -k; | |
5523 | ||
5524 | if (!de) | |
5525 | break; | |
5526 | ||
5527 | if (ignore_file(de->d_name)) | |
5528 | continue; | |
5529 | ||
5530 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5531 | if (device < 0) { | |
5532 | if (errno == ENOENT || errno == ENOTDIR) | |
5533 | continue; | |
5534 | ||
5535 | return -errno; | |
5536 | } | |
5537 | ||
5538 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5539 | if (fd < 0) { | |
5540 | if (errno == ENOENT) | |
5541 | continue; | |
5542 | ||
5543 | return -errno; | |
5544 | } | |
5545 | ||
5546 | n = read(fd, contents, sizeof(contents)); | |
5547 | if (n < 0) | |
5548 | return -errno; | |
5549 | ||
5550 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5551 | continue; | |
5552 | ||
5553 | close_nointr_nofail(fd); | |
5554 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5555 | if (fd < 0) { | |
5556 | if (errno == ENOENT) | |
5557 | continue; | |
5558 | ||
5559 | return -errno; | |
5560 | } | |
5561 | ||
5562 | n = read(fd, contents, sizeof(contents)); | |
5563 | if (n < 0) | |
5564 | return -errno; | |
5565 | ||
5566 | if (n != 2 || contents[1] != '\n') | |
5567 | return -EIO; | |
5568 | ||
5569 | if (contents[0] == '1') { | |
5570 | found_online = true; | |
5571 | break; | |
5572 | } else if (contents[0] == '0') | |
5573 | found_offline = true; | |
5574 | else | |
5575 | return -EIO; | |
5576 | } | |
5577 | ||
5578 | return found_online || !found_offline; | |
5579 | } | |
fabe5c0e LP |
5580 | |
5581 | static int search_and_fopen_internal(const char *path, const char *mode, char **search, FILE **_f) { | |
5582 | char **i; | |
5583 | ||
5584 | assert(path); | |
5585 | assert(mode); | |
5586 | assert(_f); | |
5587 | ||
5588 | if (!path_strv_canonicalize_uniq(search)) | |
5589 | return -ENOMEM; | |
5590 | ||
5591 | STRV_FOREACH(i, search) { | |
5592 | _cleanup_free_ char *p = NULL; | |
5593 | FILE *f; | |
5594 | ||
5595 | p = strjoin(*i, "/", path, NULL); | |
5596 | if (!p) | |
5597 | return -ENOMEM; | |
5598 | ||
5599 | f = fopen(p, mode); | |
5600 | if (f) { | |
5601 | *_f = f; | |
5602 | return 0; | |
5603 | } | |
5604 | ||
5605 | if (errno != ENOENT) | |
5606 | return -errno; | |
5607 | } | |
5608 | ||
5609 | return -ENOENT; | |
5610 | } | |
5611 | ||
5612 | int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f) { | |
5613 | _cleanup_strv_free_ char **copy = NULL; | |
5614 | ||
5615 | assert(path); | |
5616 | assert(mode); | |
5617 | assert(_f); | |
5618 | ||
5619 | if (path_is_absolute(path)) { | |
5620 | FILE *f; | |
5621 | ||
5622 | f = fopen(path, mode); | |
5623 | if (f) { | |
5624 | *_f = f; | |
5625 | return 0; | |
5626 | } | |
5627 | ||
5628 | return -errno; | |
5629 | } | |
5630 | ||
5631 | copy = strv_copy((char**) search); | |
5632 | if (!copy) | |
5633 | return -ENOMEM; | |
5634 | ||
5635 | return search_and_fopen_internal(path, mode, copy, _f); | |
5636 | } | |
5637 | ||
5638 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f) { | |
5639 | _cleanup_strv_free_ char **s = NULL; | |
5640 | ||
5641 | if (path_is_absolute(path)) { | |
5642 | FILE *f; | |
5643 | ||
5644 | f = fopen(path, mode); | |
5645 | if (f) { | |
5646 | *_f = f; | |
5647 | return 0; | |
5648 | } | |
5649 | ||
5650 | return -errno; | |
5651 | } | |
5652 | ||
5653 | s = strv_split_nulstr(search); | |
5654 | if (!s) | |
5655 | return -ENOMEM; | |
5656 | ||
5657 | return search_and_fopen_internal(path, mode, s, _f); | |
5658 | } |