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Commit | Line | Data |
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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" |
56cf987f | 73 | |
9a0e6896 LP |
74 | int saved_argc = 0; |
75 | char **saved_argv = NULL; | |
9086e840 | 76 | |
28917d7d | 77 | static volatile unsigned cached_columns = 0; |
ed757c0c | 78 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 79 | |
37f85e66 | 80 | size_t page_size(void) { |
81 | static __thread size_t pgsz = 0; | |
82 | long r; | |
83 | ||
87d2c1ff | 84 | if (_likely_(pgsz > 0)) |
37f85e66 | 85 | return pgsz; |
86 | ||
e67f47e5 LP |
87 | r = sysconf(_SC_PAGESIZE); |
88 | assert(r > 0); | |
37f85e66 | 89 | |
90 | pgsz = (size_t) r; | |
37f85e66 | 91 | return pgsz; |
92 | } | |
93 | ||
e05797fb LP |
94 | bool streq_ptr(const char *a, const char *b) { |
95 | ||
96 | /* Like streq(), but tries to make sense of NULL pointers */ | |
97 | ||
98 | if (a && b) | |
99 | return streq(a, b); | |
100 | ||
101 | if (!a && !b) | |
102 | return true; | |
103 | ||
104 | return false; | |
105 | } | |
106 | ||
8c7c140f | 107 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
108 | size_t sl, pl; |
109 | ||
110 | assert(s); | |
111 | assert(postfix); | |
112 | ||
113 | sl = strlen(s); | |
114 | pl = strlen(postfix); | |
115 | ||
d4d0d4db | 116 | if (pl == 0) |
8c7c140f | 117 | return (char*) s + sl; |
d4d0d4db | 118 | |
60918275 | 119 | if (sl < pl) |
8c7c140f LP |
120 | return NULL; |
121 | ||
122 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
123 | return NULL; | |
60918275 | 124 | |
8c7c140f | 125 | return (char*) s + sl - pl; |
60918275 LP |
126 | } |
127 | ||
e8988fc2 LP |
128 | char* startswith(const char *s, const char *prefix) { |
129 | const char *a, *b; | |
60918275 LP |
130 | |
131 | assert(s); | |
132 | assert(prefix); | |
133 | ||
e8988fc2 LP |
134 | a = s, b = prefix; |
135 | for (;;) { | |
136 | if (*b == 0) | |
137 | return (char*) a; | |
138 | if (*a != *b) | |
139 | return NULL; | |
60918275 | 140 | |
e8988fc2 LP |
141 | a++, b++; |
142 | } | |
60918275 LP |
143 | } |
144 | ||
e8988fc2 LP |
145 | char* startswith_no_case(const char *s, const char *prefix) { |
146 | const char *a, *b; | |
3177a7fa MAP |
147 | |
148 | assert(s); | |
149 | assert(prefix); | |
150 | ||
e8988fc2 LP |
151 | a = s, b = prefix; |
152 | for (;;) { | |
153 | if (*b == 0) | |
154 | return (char*) a; | |
155 | if (tolower(*a) != tolower(*b)) | |
156 | return NULL; | |
3177a7fa | 157 | |
e8988fc2 LP |
158 | a++, b++; |
159 | } | |
3177a7fa MAP |
160 | } |
161 | ||
79d6d816 LP |
162 | bool first_word(const char *s, const char *word) { |
163 | size_t sl, wl; | |
164 | ||
165 | assert(s); | |
166 | assert(word); | |
167 | ||
168 | sl = strlen(s); | |
169 | wl = strlen(word); | |
170 | ||
171 | if (sl < wl) | |
172 | return false; | |
173 | ||
d4d0d4db LP |
174 | if (wl == 0) |
175 | return true; | |
176 | ||
79d6d816 LP |
177 | if (memcmp(s, word, wl) != 0) |
178 | return false; | |
179 | ||
d4d0d4db LP |
180 | return s[wl] == 0 || |
181 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
182 | } |
183 | ||
42f4e3c4 | 184 | int close_nointr(int fd) { |
60918275 LP |
185 | assert(fd >= 0); |
186 | ||
187 | for (;;) { | |
188 | int r; | |
189 | ||
48f82119 LP |
190 | r = close(fd); |
191 | if (r >= 0) | |
60918275 LP |
192 | return r; |
193 | ||
194 | if (errno != EINTR) | |
48f82119 | 195 | return -errno; |
60918275 LP |
196 | } |
197 | } | |
85261803 | 198 | |
85f136b5 | 199 | void close_nointr_nofail(int fd) { |
80876c20 | 200 | int saved_errno = errno; |
85f136b5 LP |
201 | |
202 | /* like close_nointr() but cannot fail, and guarantees errno | |
203 | * is unchanged */ | |
204 | ||
205 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
206 | |
207 | errno = saved_errno; | |
85f136b5 LP |
208 | } |
209 | ||
5b6319dc LP |
210 | void close_many(const int fds[], unsigned n_fd) { |
211 | unsigned i; | |
212 | ||
213 | for (i = 0; i < n_fd; i++) | |
214 | close_nointr_nofail(fds[i]); | |
215 | } | |
216 | ||
85261803 LP |
217 | int parse_boolean(const char *v) { |
218 | assert(v); | |
219 | ||
44d8db9e | 220 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on")) |
85261803 | 221 | return 1; |
44d8db9e | 222 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off")) |
85261803 LP |
223 | return 0; |
224 | ||
225 | return -EINVAL; | |
226 | } | |
227 | ||
3ba686c1 | 228 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 229 | unsigned long ul = 0; |
3ba686c1 LP |
230 | pid_t pid; |
231 | int r; | |
232 | ||
233 | assert(s); | |
234 | assert(ret_pid); | |
235 | ||
e67f47e5 LP |
236 | r = safe_atolu(s, &ul); |
237 | if (r < 0) | |
3ba686c1 LP |
238 | return r; |
239 | ||
240 | pid = (pid_t) ul; | |
241 | ||
242 | if ((unsigned long) pid != ul) | |
243 | return -ERANGE; | |
244 | ||
245 | if (pid <= 0) | |
246 | return -ERANGE; | |
247 | ||
248 | *ret_pid = pid; | |
249 | return 0; | |
250 | } | |
251 | ||
034a2a52 LP |
252 | int parse_uid(const char *s, uid_t* ret_uid) { |
253 | unsigned long ul = 0; | |
254 | uid_t uid; | |
255 | int r; | |
256 | ||
257 | assert(s); | |
258 | assert(ret_uid); | |
259 | ||
e67f47e5 LP |
260 | r = safe_atolu(s, &ul); |
261 | if (r < 0) | |
034a2a52 LP |
262 | return r; |
263 | ||
264 | uid = (uid_t) ul; | |
265 | ||
266 | if ((unsigned long) uid != ul) | |
267 | return -ERANGE; | |
268 | ||
269 | *ret_uid = uid; | |
270 | return 0; | |
271 | } | |
272 | ||
85261803 LP |
273 | int safe_atou(const char *s, unsigned *ret_u) { |
274 | char *x = NULL; | |
034c6ed7 | 275 | unsigned long l; |
85261803 LP |
276 | |
277 | assert(s); | |
278 | assert(ret_u); | |
279 | ||
280 | errno = 0; | |
281 | l = strtoul(s, &x, 0); | |
282 | ||
f3910003 | 283 | if (!x || x == s || *x || errno) |
85261803 LP |
284 | return errno ? -errno : -EINVAL; |
285 | ||
034c6ed7 | 286 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
287 | return -ERANGE; |
288 | ||
289 | *ret_u = (unsigned) l; | |
290 | return 0; | |
291 | } | |
292 | ||
293 | int safe_atoi(const char *s, int *ret_i) { | |
294 | char *x = NULL; | |
034c6ed7 | 295 | long l; |
85261803 LP |
296 | |
297 | assert(s); | |
298 | assert(ret_i); | |
299 | ||
300 | errno = 0; | |
301 | l = strtol(s, &x, 0); | |
302 | ||
f3910003 | 303 | if (!x || x == s || *x || errno) |
85261803 LP |
304 | return errno ? -errno : -EINVAL; |
305 | ||
034c6ed7 | 306 | if ((long) (int) l != l) |
85261803 LP |
307 | return -ERANGE; |
308 | ||
034c6ed7 LP |
309 | *ret_i = (int) l; |
310 | return 0; | |
311 | } | |
312 | ||
034c6ed7 LP |
313 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
314 | char *x = NULL; | |
315 | unsigned long long l; | |
316 | ||
317 | assert(s); | |
318 | assert(ret_llu); | |
319 | ||
320 | errno = 0; | |
321 | l = strtoull(s, &x, 0); | |
322 | ||
f3910003 | 323 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
324 | return errno ? -errno : -EINVAL; |
325 | ||
326 | *ret_llu = l; | |
327 | return 0; | |
328 | } | |
329 | ||
330 | int safe_atolli(const char *s, long long int *ret_lli) { | |
331 | char *x = NULL; | |
332 | long long l; | |
333 | ||
334 | assert(s); | |
335 | assert(ret_lli); | |
336 | ||
337 | errno = 0; | |
338 | l = strtoll(s, &x, 0); | |
339 | ||
f3910003 | 340 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
341 | return errno ? -errno : -EINVAL; |
342 | ||
343 | *ret_lli = l; | |
85261803 LP |
344 | return 0; |
345 | } | |
a41e8209 | 346 | |
a41e8209 | 347 | /* Split a string into words. */ |
65d2ebdc | 348 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
349 | char *current; |
350 | ||
351 | current = *state ? *state : (char*) c; | |
352 | ||
353 | if (!*current || *c == 0) | |
354 | return NULL; | |
355 | ||
65d2ebdc LP |
356 | current += strspn(current, separator); |
357 | *l = strcspn(current, separator); | |
82919e3d LP |
358 | *state = current+*l; |
359 | ||
360 | return (char*) current; | |
361 | } | |
362 | ||
034c6ed7 LP |
363 | /* Split a string into words, but consider strings enclosed in '' and |
364 | * "" as words even if they include spaces. */ | |
365 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
366 | char *current, *e; |
367 | bool escaped = false; | |
034c6ed7 LP |
368 | |
369 | current = *state ? *state : (char*) c; | |
370 | ||
371 | if (!*current || *c == 0) | |
372 | return NULL; | |
373 | ||
374 | current += strspn(current, WHITESPACE); | |
375 | ||
376 | if (*current == '\'') { | |
377 | current ++; | |
034c6ed7 | 378 | |
0bab36f2 LP |
379 | for (e = current; *e; e++) { |
380 | if (escaped) | |
381 | escaped = false; | |
382 | else if (*e == '\\') | |
383 | escaped = true; | |
384 | else if (*e == '\'') | |
385 | break; | |
386 | } | |
387 | ||
388 | *l = e-current; | |
389 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
390 | } else if (*current == '\"') { |
391 | current ++; | |
034c6ed7 | 392 | |
0bab36f2 LP |
393 | for (e = current; *e; e++) { |
394 | if (escaped) | |
395 | escaped = false; | |
396 | else if (*e == '\\') | |
397 | escaped = true; | |
398 | else if (*e == '\"') | |
399 | break; | |
400 | } | |
401 | ||
402 | *l = e-current; | |
403 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 404 | } else { |
0bab36f2 LP |
405 | for (e = current; *e; e++) { |
406 | if (escaped) | |
407 | escaped = false; | |
408 | else if (*e == '\\') | |
409 | escaped = true; | |
410 | else if (strchr(WHITESPACE, *e)) | |
411 | break; | |
412 | } | |
413 | *l = e-current; | |
414 | *state = e; | |
034c6ed7 LP |
415 | } |
416 | ||
417 | return (char*) current; | |
418 | } | |
419 | ||
034c6ed7 LP |
420 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
421 | int r; | |
2fbe635a | 422 | _cleanup_fclose_ FILE *f = NULL; |
20c03b7b | 423 | char fn[PATH_MAX], line[LINE_MAX], *p; |
bb00e604 | 424 | long unsigned ppid; |
034c6ed7 | 425 | |
8480e784 | 426 | assert(pid > 0); |
034c6ed7 LP |
427 | assert(_ppid); |
428 | ||
bb00e604 | 429 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
8480e784 | 430 | char_array_0(fn); |
034c6ed7 | 431 | |
2fbe635a LP |
432 | f = fopen(fn, "re"); |
433 | if (!f) | |
034c6ed7 LP |
434 | return -errno; |
435 | ||
2fbe635a | 436 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 437 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
438 | return r; |
439 | } | |
440 | ||
034c6ed7 LP |
441 | /* Let's skip the pid and comm fields. The latter is enclosed |
442 | * in () but does not escape any () in its value, so let's | |
443 | * skip over it manually */ | |
444 | ||
2fbe635a LP |
445 | p = strrchr(line, ')'); |
446 | if (!p) | |
034c6ed7 LP |
447 | return -EIO; |
448 | ||
449 | p++; | |
450 | ||
451 | if (sscanf(p, " " | |
452 | "%*c " /* state */ | |
bb00e604 | 453 | "%lu ", /* ppid */ |
034c6ed7 LP |
454 | &ppid) != 1) |
455 | return -EIO; | |
456 | ||
bb00e604 | 457 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
458 | return -ERANGE; |
459 | ||
460 | *_ppid = (pid_t) ppid; | |
461 | ||
462 | return 0; | |
463 | } | |
464 | ||
7640a5de | 465 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
e67f47e5 | 466 | _cleanup_fclose_ FILE *f = NULL; |
7640a5de LP |
467 | char fn[PATH_MAX], line[LINE_MAX], *p; |
468 | ||
469 | assert(pid > 0); | |
470 | assert(st); | |
471 | ||
472 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); | |
473 | char_array_0(fn); | |
474 | ||
e67f47e5 LP |
475 | f = fopen(fn, "re"); |
476 | if (!f) | |
7640a5de LP |
477 | return -errno; |
478 | ||
e67f47e5 LP |
479 | if (!fgets(line, sizeof(line), f)) { |
480 | if (ferror(f)) | |
481 | return -errno; | |
7640a5de | 482 | |
e67f47e5 LP |
483 | return -EIO; |
484 | } | |
7640a5de LP |
485 | |
486 | /* Let's skip the pid and comm fields. The latter is enclosed | |
487 | * in () but does not escape any () in its value, so let's | |
488 | * skip over it manually */ | |
489 | ||
e67f47e5 LP |
490 | p = strrchr(line, ')'); |
491 | if (!p) | |
7640a5de LP |
492 | return -EIO; |
493 | ||
494 | p++; | |
495 | ||
496 | if (sscanf(p, " " | |
497 | "%*c " /* state */ | |
498 | "%*d " /* ppid */ | |
499 | "%*d " /* pgrp */ | |
500 | "%*d " /* session */ | |
501 | "%*d " /* tty_nr */ | |
502 | "%*d " /* tpgid */ | |
503 | "%*u " /* flags */ | |
504 | "%*u " /* minflt */ | |
505 | "%*u " /* cminflt */ | |
506 | "%*u " /* majflt */ | |
507 | "%*u " /* cmajflt */ | |
508 | "%*u " /* utime */ | |
509 | "%*u " /* stime */ | |
510 | "%*d " /* cutime */ | |
511 | "%*d " /* cstime */ | |
512 | "%*d " /* priority */ | |
513 | "%*d " /* nice */ | |
514 | "%*d " /* num_threads */ | |
515 | "%*d " /* itrealvalue */ | |
516 | "%llu " /* starttime */, | |
517 | st) != 1) | |
518 | return -EIO; | |
519 | ||
520 | return 0; | |
521 | } | |
522 | ||
034c6ed7 | 523 | int write_one_line_file(const char *fn, const char *line) { |
e67f47e5 | 524 | _cleanup_fclose_ FILE *f = NULL; |
034c6ed7 LP |
525 | |
526 | assert(fn); | |
527 | assert(line); | |
528 | ||
03ad1136 LP |
529 | f = fopen(fn, "we"); |
530 | if (!f) | |
034c6ed7 LP |
531 | return -errno; |
532 | ||
34ca941c | 533 | errno = 0; |
e67f47e5 LP |
534 | if (fputs(line, f) < 0) |
535 | return errno ? -errno : -EIO; | |
034c6ed7 | 536 | |
8e1bd70d LP |
537 | if (!endswith(line, "\n")) |
538 | fputc('\n', f); | |
539 | ||
151b190e LP |
540 | fflush(f); |
541 | ||
e67f47e5 LP |
542 | if (ferror(f)) |
543 | return errno ? -errno : -EIO; | |
151b190e | 544 | |
e67f47e5 | 545 | return 0; |
034c6ed7 LP |
546 | } |
547 | ||
34ca941c LP |
548 | int fchmod_umask(int fd, mode_t m) { |
549 | mode_t u; | |
550 | int r; | |
551 | ||
552 | u = umask(0777); | |
553 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
554 | umask(u); | |
555 | ||
556 | return r; | |
557 | } | |
558 | ||
559 | int write_one_line_file_atomic(const char *fn, const char *line) { | |
e884315e LP |
560 | _cleanup_fclose_ FILE *f = NULL; |
561 | _cleanup_free_ char *p = NULL; | |
34ca941c | 562 | int r; |
34ca941c LP |
563 | |
564 | assert(fn); | |
565 | assert(line); | |
566 | ||
567 | r = fopen_temporary(fn, &f, &p); | |
568 | if (r < 0) | |
569 | return r; | |
570 | ||
571 | fchmod_umask(fileno(f), 0644); | |
572 | ||
573 | errno = 0; | |
574 | if (fputs(line, f) < 0) { | |
575 | r = -errno; | |
576 | goto finish; | |
577 | } | |
578 | ||
579 | if (!endswith(line, "\n")) | |
580 | fputc('\n', f); | |
581 | ||
582 | fflush(f); | |
583 | ||
e884315e LP |
584 | if (ferror(f)) |
585 | r = errno ? -errno : -EIO; | |
586 | else { | |
34ca941c LP |
587 | if (rename(p, fn) < 0) |
588 | r = -errno; | |
589 | else | |
590 | r = 0; | |
591 | } | |
592 | ||
593 | finish: | |
594 | if (r < 0) | |
595 | unlink(p); | |
596 | ||
34ca941c LP |
597 | return r; |
598 | } | |
599 | ||
034c6ed7 | 600 | int read_one_line_file(const char *fn, char **line) { |
2fbe635a | 601 | _cleanup_fclose_ FILE *f = NULL; |
97c4a07d | 602 | char t[LINE_MAX], *c; |
034c6ed7 LP |
603 | |
604 | assert(fn); | |
605 | assert(line); | |
606 | ||
4099a281 LP |
607 | f = fopen(fn, "re"); |
608 | if (!f) | |
034c6ed7 LP |
609 | return -errno; |
610 | ||
4099a281 LP |
611 | if (!fgets(t, sizeof(t), f)) { |
612 | ||
2fbe635a | 613 | if (ferror(f)) |
e67f47e5 | 614 | return errno ? -errno : -EIO; |
4099a281 LP |
615 | |
616 | t[0] = 0; | |
034c6ed7 LP |
617 | } |
618 | ||
4099a281 | 619 | c = strdup(t); |
2fbe635a LP |
620 | if (!c) |
621 | return -ENOMEM; | |
6f9a471a LP |
622 | truncate_nl(c); |
623 | ||
034c6ed7 | 624 | *line = c; |
2fbe635a | 625 | return 0; |
034c6ed7 | 626 | } |
44d8db9e | 627 | |
34ca941c | 628 | int read_full_file(const char *fn, char **contents, size_t *size) { |
2fbe635a | 629 | _cleanup_fclose_ FILE *f = NULL; |
97c4a07d | 630 | size_t n, l; |
2fbe635a | 631 | _cleanup_free_ char *buf = NULL; |
97c4a07d LP |
632 | struct stat st; |
633 | ||
d2a30975 LP |
634 | assert(fn); |
635 | assert(contents); | |
636 | ||
2fbe635a LP |
637 | f = fopen(fn, "re"); |
638 | if (!f) | |
97c4a07d LP |
639 | return -errno; |
640 | ||
2fbe635a LP |
641 | if (fstat(fileno(f), &st) < 0) |
642 | return -errno; | |
97c4a07d | 643 | |
34ca941c | 644 | /* Safety check */ |
2fbe635a LP |
645 | if (st.st_size > 4*1024*1024) |
646 | return -E2BIG; | |
34ca941c | 647 | |
97c4a07d LP |
648 | n = st.st_size > 0 ? st.st_size : LINE_MAX; |
649 | l = 0; | |
650 | ||
651 | for (;;) { | |
652 | char *t; | |
653 | size_t k; | |
654 | ||
2fbe635a LP |
655 | t = realloc(buf, n+1); |
656 | if (!t) | |
657 | return -ENOMEM; | |
97c4a07d LP |
658 | |
659 | buf = t; | |
660 | k = fread(buf + l, 1, n - l, f); | |
661 | ||
662 | if (k <= 0) { | |
2fbe635a LP |
663 | if (ferror(f)) |
664 | return -errno; | |
97c4a07d LP |
665 | |
666 | break; | |
667 | } | |
668 | ||
669 | l += k; | |
670 | n *= 2; | |
671 | ||
672 | /* Safety check */ | |
2fbe635a LP |
673 | if (n > 4*1024*1024) |
674 | return -E2BIG; | |
97c4a07d LP |
675 | } |
676 | ||
f8440af5 | 677 | buf[l] = 0; |
97c4a07d LP |
678 | *contents = buf; |
679 | buf = NULL; | |
680 | ||
34ca941c LP |
681 | if (size) |
682 | *size = l; | |
683 | ||
2fbe635a | 684 | return 0; |
97c4a07d LP |
685 | } |
686 | ||
687 | int parse_env_file( | |
688 | const char *fname, | |
c899f8c6 | 689 | const char *separator, ...) { |
97c4a07d | 690 | |
ce8a6aa1 | 691 | int r = 0; |
44d91056 | 692 | char *contents = NULL, *p; |
97c4a07d LP |
693 | |
694 | assert(fname); | |
c899f8c6 | 695 | assert(separator); |
97c4a07d | 696 | |
34ca941c | 697 | if ((r = read_full_file(fname, &contents, NULL)) < 0) |
97c4a07d LP |
698 | return r; |
699 | ||
700 | p = contents; | |
701 | for (;;) { | |
702 | const char *key = NULL; | |
703 | ||
c899f8c6 | 704 | p += strspn(p, separator); |
97c4a07d LP |
705 | p += strspn(p, WHITESPACE); |
706 | ||
707 | if (!*p) | |
708 | break; | |
709 | ||
710 | if (!strchr(COMMENTS, *p)) { | |
711 | va_list ap; | |
712 | char **value; | |
713 | ||
c899f8c6 | 714 | va_start(ap, separator); |
97c4a07d LP |
715 | while ((key = va_arg(ap, char *))) { |
716 | size_t n; | |
717 | char *v; | |
718 | ||
719 | value = va_arg(ap, char **); | |
720 | ||
721 | n = strlen(key); | |
722 | if (strncmp(p, key, n) != 0 || | |
723 | p[n] != '=') | |
724 | continue; | |
725 | ||
726 | p += n + 1; | |
c899f8c6 | 727 | n = strcspn(p, separator); |
97c4a07d LP |
728 | |
729 | if (n >= 2 && | |
e7db37dd LP |
730 | strchr(QUOTES, p[0]) && |
731 | p[n-1] == p[0]) | |
97c4a07d LP |
732 | v = strndup(p+1, n-2); |
733 | else | |
734 | v = strndup(p, n); | |
735 | ||
736 | if (!v) { | |
737 | r = -ENOMEM; | |
738 | va_end(ap); | |
739 | goto fail; | |
740 | } | |
741 | ||
dd36de4d KS |
742 | if (v[0] == '\0') { |
743 | /* return empty value strings as NULL */ | |
744 | free(v); | |
745 | v = NULL; | |
746 | } | |
747 | ||
97c4a07d LP |
748 | free(*value); |
749 | *value = v; | |
750 | ||
751 | p += n; | |
ce8a6aa1 LP |
752 | |
753 | r ++; | |
97c4a07d LP |
754 | break; |
755 | } | |
756 | va_end(ap); | |
757 | } | |
758 | ||
759 | if (!key) | |
c899f8c6 | 760 | p += strcspn(p, separator); |
97c4a07d LP |
761 | } |
762 | ||
97c4a07d LP |
763 | fail: |
764 | free(contents); | |
765 | return r; | |
766 | } | |
767 | ||
b9893505 ZJS |
768 | int load_env_file(const char *fname, |
769 | char ***rl) { | |
8c7be95e | 770 | |
b9893505 | 771 | FILE _cleanup_fclose_ *f; |
565d91fd | 772 | char *b; |
b9893505 ZJS |
773 | char _cleanup_free_ *c = NULL; |
774 | char _cleanup_strv_free_ **m = NULL; | |
8c7be95e LP |
775 | |
776 | assert(fname); | |
777 | assert(rl); | |
778 | ||
b9893505 ZJS |
779 | f = fopen(fname, "re"); |
780 | if (!f) | |
8c7be95e LP |
781 | return -errno; |
782 | ||
783 | while (!feof(f)) { | |
565d91fd | 784 | char l[LINE_MAX], *p, *u, *cs; |
8c7be95e LP |
785 | char **t; |
786 | ||
787 | if (!fgets(l, sizeof(l), f)) { | |
b9893505 ZJS |
788 | if (!feof(f)) |
789 | return -errno; | |
565d91fd | 790 | else if (!c) |
8c7be95e | 791 | break; |
8c7be95e LP |
792 | } |
793 | ||
565d91fd MV |
794 | cs = endswith(l, "\\\n"); |
795 | if (cs) { | |
565d91fd MV |
796 | *cs = '\0'; |
797 | b = strappend(c, l); | |
b9893505 ZJS |
798 | if (!b) |
799 | return log_oom(); | |
800 | ||
565d91fd MV |
801 | free(c); |
802 | c = b; | |
803 | *l = '\0'; | |
804 | continue; | |
805 | } | |
806 | ||
807 | if (c) { | |
808 | b = strappend(c, l); | |
b9893505 ZJS |
809 | if (!b) |
810 | return log_oom(); | |
811 | ||
565d91fd MV |
812 | free(c); |
813 | c = b; | |
814 | } | |
815 | ||
816 | p = strstrip(c ? c : l); | |
8c7be95e LP |
817 | |
818 | if (!*p) | |
819 | continue; | |
820 | ||
821 | if (strchr(COMMENTS, *p)) | |
822 | continue; | |
823 | ||
b9893505 ZJS |
824 | u = normalize_env_assignment(p); |
825 | if (!u) | |
826 | return log_oom(); | |
827 | ||
565d91fd MV |
828 | free(c); |
829 | c = NULL; | |
8c7be95e LP |
830 | |
831 | t = strv_append(m, u); | |
832 | free(u); | |
833 | ||
b9893505 ZJS |
834 | if (!t) |
835 | return log_oom(); | |
8c7be95e LP |
836 | |
837 | strv_free(m); | |
838 | m = t; | |
839 | } | |
840 | ||
8c7be95e LP |
841 | *rl = m; |
842 | m = NULL; | |
843 | ||
b9893505 | 844 | return 0; |
8c7be95e LP |
845 | } |
846 | ||
7640a5de | 847 | int write_env_file(const char *fname, char **l) { |
34ca941c | 848 | char **i, *p; |
7640a5de LP |
849 | FILE *f; |
850 | int r; | |
851 | ||
34ca941c LP |
852 | r = fopen_temporary(fname, &f, &p); |
853 | if (r < 0) | |
854 | return r; | |
7640a5de | 855 | |
34ca941c LP |
856 | fchmod_umask(fileno(f), 0644); |
857 | ||
858 | errno = 0; | |
7640a5de LP |
859 | STRV_FOREACH(i, l) { |
860 | fputs(*i, f); | |
861 | fputc('\n', f); | |
862 | } | |
863 | ||
864 | fflush(f); | |
865 | ||
34ca941c LP |
866 | if (ferror(f)) { |
867 | if (errno != 0) | |
868 | r = -errno; | |
869 | else | |
870 | r = -EIO; | |
871 | } else { | |
872 | if (rename(p, fname) < 0) | |
873 | r = -errno; | |
874 | else | |
875 | r = 0; | |
876 | } | |
877 | ||
878 | if (r < 0) | |
879 | unlink(p); | |
880 | ||
7640a5de | 881 | fclose(f); |
34ca941c | 882 | free(p); |
7640a5de LP |
883 | |
884 | return r; | |
885 | } | |
886 | ||
7072ced8 LP |
887 | char *truncate_nl(char *s) { |
888 | assert(s); | |
889 | ||
890 | s[strcspn(s, NEWLINE)] = 0; | |
891 | return s; | |
892 | } | |
893 | ||
87d2c1ff | 894 | int get_process_comm(pid_t pid, char **name) { |
7072ced8 LP |
895 | int r; |
896 | ||
7072ced8 LP |
897 | assert(name); |
898 | ||
87d2c1ff LP |
899 | if (pid == 0) |
900 | r = read_one_line_file("/proc/self/comm", name); | |
901 | else { | |
902 | char *p; | |
903 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) | |
904 | return -ENOMEM; | |
7072ced8 | 905 | |
87d2c1ff LP |
906 | r = read_one_line_file(p, name); |
907 | free(p); | |
908 | } | |
7072ced8 | 909 | |
87d2c1ff | 910 | return r; |
7072ced8 LP |
911 | } |
912 | ||
87d2c1ff | 913 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
9bdbc2e2 | 914 | char *r = NULL, *k; |
c59760ee | 915 | int c; |
c59760ee LP |
916 | FILE *f; |
917 | ||
c59760ee LP |
918 | assert(line); |
919 | ||
87d2c1ff LP |
920 | if (pid == 0) |
921 | f = fopen("/proc/self/cmdline", "re"); | |
922 | else { | |
923 | char *p; | |
924 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
925 | return -ENOMEM; | |
c59760ee | 926 | |
87d2c1ff LP |
927 | f = fopen(p, "re"); |
928 | free(p); | |
929 | } | |
c59760ee LP |
930 | |
931 | if (!f) | |
932 | return -errno; | |
9bdbc2e2 LN |
933 | if (max_length == 0) { |
934 | size_t len = 1; | |
935 | while ((c = getc(f)) != EOF) { | |
936 | k = realloc(r, len+1); | |
937 | if (k == NULL) { | |
938 | free(r); | |
939 | fclose(f); | |
940 | return -ENOMEM; | |
941 | } | |
942 | r = k; | |
943 | r[len-1] = isprint(c) ? c : ' '; | |
944 | r[len] = 0; | |
945 | len++; | |
946 | } | |
947 | } else { | |
948 | bool space = false; | |
949 | size_t left; | |
950 | r = new(char, max_length); | |
951 | if (!r) { | |
952 | fclose(f); | |
953 | return -ENOMEM; | |
954 | } | |
c59760ee | 955 | |
9bdbc2e2 LN |
956 | k = r; |
957 | left = max_length; | |
958 | while ((c = getc(f)) != EOF) { | |
c59760ee | 959 | |
9bdbc2e2 LN |
960 | if (isprint(c)) { |
961 | if (space) { | |
962 | if (left <= 4) | |
963 | break; | |
964 | ||
965 | *(k++) = ' '; | |
966 | left--; | |
967 | space = false; | |
968 | } | |
c59760ee | 969 | |
c59760ee LP |
970 | if (left <= 4) |
971 | break; | |
972 | ||
9bdbc2e2 | 973 | *(k++) = (char) c; |
057fbb58 | 974 | left--; |
9bdbc2e2 LN |
975 | } else |
976 | space = true; | |
977 | } | |
c59760ee | 978 | |
9bdbc2e2 LN |
979 | if (left <= 4) { |
980 | size_t n = MIN(left-1, 3U); | |
981 | memcpy(k, "...", n); | |
982 | k[n] = 0; | |
983 | } else | |
984 | *k = 0; | |
c59760ee LP |
985 | } |
986 | ||
c59760ee LP |
987 | fclose(f); |
988 | ||
35d2e7ec | 989 | /* Kernel threads have no argv[] */ |
9bdbc2e2 | 990 | if (r == NULL || r[0] == 0) { |
35d2e7ec LP |
991 | char *t; |
992 | int h; | |
993 | ||
994 | free(r); | |
995 | ||
87d2c1ff LP |
996 | if (!comm_fallback) |
997 | return -ENOENT; | |
998 | ||
999 | h = get_process_comm(pid, &t); | |
1000 | if (h < 0) | |
35d2e7ec LP |
1001 | return h; |
1002 | ||
b7def684 | 1003 | r = strjoin("[", t, "]", NULL); |
35d2e7ec LP |
1004 | free(t); |
1005 | ||
87d2c1ff | 1006 | if (!r) |
35d2e7ec LP |
1007 | return -ENOMEM; |
1008 | } | |
fa776d8e | 1009 | |
c59760ee LP |
1010 | *line = r; |
1011 | return 0; | |
1012 | } | |
1013 | ||
1e5678d0 LP |
1014 | int is_kernel_thread(pid_t pid) { |
1015 | char *p; | |
1016 | size_t count; | |
1017 | char c; | |
1018 | bool eof; | |
1019 | FILE *f; | |
1020 | ||
1021 | if (pid == 0) | |
1022 | return 0; | |
1023 | ||
1024 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1025 | return -ENOMEM; | |
1026 | ||
1027 | f = fopen(p, "re"); | |
1028 | free(p); | |
1029 | ||
1030 | if (!f) | |
1031 | return -errno; | |
1032 | ||
1033 | count = fread(&c, 1, 1, f); | |
1034 | eof = feof(f); | |
1035 | fclose(f); | |
1036 | ||
1037 | /* Kernel threads have an empty cmdline */ | |
1038 | ||
1039 | if (count <= 0) | |
1040 | return eof ? 1 : -errno; | |
1041 | ||
1042 | return 0; | |
1043 | } | |
1044 | ||
87d2c1ff LP |
1045 | int get_process_exe(pid_t pid, char **name) { |
1046 | int r; | |
1047 | ||
1048 | assert(name); | |
1049 | ||
1050 | if (pid == 0) | |
1051 | r = readlink_malloc("/proc/self/exe", name); | |
1052 | else { | |
1053 | char *p; | |
1054 | if (asprintf(&p, "/proc/%lu/exe", (unsigned long) pid) < 0) | |
1055 | return -ENOMEM; | |
1056 | ||
1057 | r = readlink_malloc(p, name); | |
1058 | free(p); | |
1059 | } | |
1060 | ||
1061 | return r; | |
1062 | } | |
1063 | ||
901c3d0d | 1064 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
7e4ab3c5 LP |
1065 | char *p; |
1066 | FILE *f; | |
1067 | int r; | |
1068 | ||
1069 | assert(uid); | |
1070 | ||
1071 | if (pid == 0) | |
1072 | return getuid(); | |
1073 | ||
1074 | if (asprintf(&p, "/proc/%lu/status", (unsigned long) pid) < 0) | |
1075 | return -ENOMEM; | |
1076 | ||
1077 | f = fopen(p, "re"); | |
1078 | free(p); | |
1079 | ||
1080 | if (!f) | |
1081 | return -errno; | |
1082 | ||
1083 | while (!feof(f)) { | |
1084 | char line[LINE_MAX], *l; | |
1085 | ||
1086 | if (!fgets(line, sizeof(line), f)) { | |
1087 | if (feof(f)) | |
1088 | break; | |
1089 | ||
1090 | r = -errno; | |
1091 | goto finish; | |
1092 | } | |
1093 | ||
1094 | l = strstrip(line); | |
1095 | ||
901c3d0d LP |
1096 | if (startswith(l, field)) { |
1097 | l += strlen(field); | |
7e4ab3c5 LP |
1098 | l += strspn(l, WHITESPACE); |
1099 | ||
1100 | l[strcspn(l, WHITESPACE)] = 0; | |
1101 | ||
1102 | r = parse_uid(l, uid); | |
1103 | goto finish; | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | r = -EIO; | |
1108 | ||
1109 | finish: | |
1110 | fclose(f); | |
1111 | ||
1112 | return r; | |
1113 | } | |
1114 | ||
901c3d0d LP |
1115 | int get_process_uid(pid_t pid, uid_t *uid) { |
1116 | return get_process_id(pid, "Uid:", uid); | |
1117 | } | |
1118 | ||
1119 | int get_process_gid(pid_t pid, gid_t *gid) { | |
1120 | return get_process_id(pid, "Gid:", gid); | |
1121 | } | |
1122 | ||
fab56fc5 LP |
1123 | char *strnappend(const char *s, const char *suffix, size_t b) { |
1124 | size_t a; | |
44d8db9e LP |
1125 | char *r; |
1126 | ||
fab56fc5 LP |
1127 | if (!s && !suffix) |
1128 | return strdup(""); | |
1129 | ||
1130 | if (!s) | |
1131 | return strndup(suffix, b); | |
1132 | ||
1133 | if (!suffix) | |
1134 | return strdup(s); | |
1135 | ||
44d8db9e LP |
1136 | assert(s); |
1137 | assert(suffix); | |
1138 | ||
1139 | a = strlen(s); | |
aa408e77 | 1140 | if (b > ((size_t) -1) - a) |
040f18ea | 1141 | return NULL; |
44d8db9e | 1142 | |
040f18ea LP |
1143 | r = new(char, a+b+1); |
1144 | if (!r) | |
44d8db9e LP |
1145 | return NULL; |
1146 | ||
1147 | memcpy(r, s, a); | |
1148 | memcpy(r+a, suffix, b); | |
1149 | r[a+b] = 0; | |
1150 | ||
1151 | return r; | |
1152 | } | |
87f0e418 | 1153 | |
fab56fc5 LP |
1154 | char *strappend(const char *s, const char *suffix) { |
1155 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
1156 | } | |
1157 | ||
87f0e418 LP |
1158 | int readlink_malloc(const char *p, char **r) { |
1159 | size_t l = 100; | |
1160 | ||
1161 | assert(p); | |
1162 | assert(r); | |
1163 | ||
1164 | for (;;) { | |
1165 | char *c; | |
1166 | ssize_t n; | |
1167 | ||
1168 | if (!(c = new(char, l))) | |
1169 | return -ENOMEM; | |
1170 | ||
1171 | if ((n = readlink(p, c, l-1)) < 0) { | |
1172 | int ret = -errno; | |
1173 | free(c); | |
1174 | return ret; | |
1175 | } | |
1176 | ||
1177 | if ((size_t) n < l-1) { | |
1178 | c[n] = 0; | |
1179 | *r = c; | |
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | free(c); | |
1184 | l *= 2; | |
1185 | } | |
1186 | } | |
1187 | ||
2c7108c4 LP |
1188 | int readlink_and_make_absolute(const char *p, char **r) { |
1189 | char *target, *k; | |
1190 | int j; | |
1191 | ||
1192 | assert(p); | |
1193 | assert(r); | |
1194 | ||
1195 | if ((j = readlink_malloc(p, &target)) < 0) | |
1196 | return j; | |
1197 | ||
1198 | k = file_in_same_dir(p, target); | |
1199 | free(target); | |
1200 | ||
1201 | if (!k) | |
1202 | return -ENOMEM; | |
1203 | ||
1204 | *r = k; | |
1205 | return 0; | |
1206 | } | |
1207 | ||
83096483 LP |
1208 | int readlink_and_canonicalize(const char *p, char **r) { |
1209 | char *t, *s; | |
1210 | int j; | |
1211 | ||
1212 | assert(p); | |
1213 | assert(r); | |
1214 | ||
1215 | j = readlink_and_make_absolute(p, &t); | |
1216 | if (j < 0) | |
1217 | return j; | |
1218 | ||
1219 | s = canonicalize_file_name(t); | |
1220 | if (s) { | |
1221 | free(t); | |
1222 | *r = s; | |
1223 | } else | |
1224 | *r = t; | |
1225 | ||
1226 | path_kill_slashes(*r); | |
1227 | ||
1228 | return 0; | |
1229 | } | |
1230 | ||
2a987ee8 LP |
1231 | int reset_all_signal_handlers(void) { |
1232 | int sig; | |
1233 | ||
1234 | for (sig = 1; sig < _NSIG; sig++) { | |
1235 | struct sigaction sa; | |
1236 | ||
1237 | if (sig == SIGKILL || sig == SIGSTOP) | |
1238 | continue; | |
1239 | ||
1240 | zero(sa); | |
1241 | sa.sa_handler = SIG_DFL; | |
431c32bf | 1242 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
1243 | |
1244 | /* On Linux the first two RT signals are reserved by | |
1245 | * glibc, and sigaction() will return EINVAL for them. */ | |
1246 | if ((sigaction(sig, &sa, NULL) < 0)) | |
1247 | if (errno != EINVAL) | |
1248 | return -errno; | |
1249 | } | |
1250 | ||
8e274523 | 1251 | return 0; |
2a987ee8 | 1252 | } |
4a72ff34 LP |
1253 | |
1254 | char *strstrip(char *s) { | |
57a8eca8 | 1255 | char *e; |
4a72ff34 LP |
1256 | |
1257 | /* Drops trailing whitespace. Modifies the string in | |
1258 | * place. Returns pointer to first non-space character */ | |
1259 | ||
1260 | s += strspn(s, WHITESPACE); | |
1261 | ||
57a8eca8 LP |
1262 | for (e = strchr(s, 0); e > s; e --) |
1263 | if (!strchr(WHITESPACE, e[-1])) | |
1264 | break; | |
4a72ff34 | 1265 | |
57a8eca8 | 1266 | *e = 0; |
4a72ff34 LP |
1267 | |
1268 | return s; | |
4a72ff34 LP |
1269 | } |
1270 | ||
ee9b5e01 LP |
1271 | char *delete_chars(char *s, const char *bad) { |
1272 | char *f, *t; | |
1273 | ||
1274 | /* Drops all whitespace, regardless where in the string */ | |
1275 | ||
1276 | for (f = s, t = s; *f; f++) { | |
1277 | if (strchr(bad, *f)) | |
1278 | continue; | |
1279 | ||
1280 | *(t++) = *f; | |
1281 | } | |
1282 | ||
1283 | *t = 0; | |
1284 | ||
1285 | return s; | |
1286 | } | |
1287 | ||
ab1f0633 LP |
1288 | bool in_charset(const char *s, const char* charset) { |
1289 | const char *i; | |
1290 | ||
1291 | assert(s); | |
1292 | assert(charset); | |
1293 | ||
1294 | for (i = s; *i; i++) | |
1295 | if (!strchr(charset, *i)) | |
1296 | return false; | |
1297 | ||
1298 | return true; | |
1299 | } | |
1300 | ||
4a72ff34 LP |
1301 | char *file_in_same_dir(const char *path, const char *filename) { |
1302 | char *e, *r; | |
1303 | size_t k; | |
1304 | ||
1305 | assert(path); | |
1306 | assert(filename); | |
1307 | ||
1308 | /* This removes the last component of path and appends | |
1309 | * filename, unless the latter is absolute anyway or the | |
1310 | * former isn't */ | |
1311 | ||
1312 | if (path_is_absolute(filename)) | |
1313 | return strdup(filename); | |
1314 | ||
1315 | if (!(e = strrchr(path, '/'))) | |
1316 | return strdup(filename); | |
1317 | ||
1318 | k = strlen(filename); | |
1319 | if (!(r = new(char, e-path+1+k+1))) | |
1320 | return NULL; | |
1321 | ||
1322 | memcpy(r, path, e-path+1); | |
1323 | memcpy(r+(e-path)+1, filename, k+1); | |
1324 | ||
1325 | return r; | |
1326 | } | |
fb624d04 | 1327 | |
c32dd69b LP |
1328 | int rmdir_parents(const char *path, const char *stop) { |
1329 | size_t l; | |
1330 | int r = 0; | |
1331 | ||
1332 | assert(path); | |
1333 | assert(stop); | |
1334 | ||
1335 | l = strlen(path); | |
1336 | ||
1337 | /* Skip trailing slashes */ | |
1338 | while (l > 0 && path[l-1] == '/') | |
1339 | l--; | |
1340 | ||
1341 | while (l > 0) { | |
1342 | char *t; | |
1343 | ||
1344 | /* Skip last component */ | |
1345 | while (l > 0 && path[l-1] != '/') | |
1346 | l--; | |
1347 | ||
1348 | /* Skip trailing slashes */ | |
1349 | while (l > 0 && path[l-1] == '/') | |
1350 | l--; | |
1351 | ||
1352 | if (l <= 0) | |
1353 | break; | |
1354 | ||
1355 | if (!(t = strndup(path, l))) | |
1356 | return -ENOMEM; | |
1357 | ||
1358 | if (path_startswith(stop, t)) { | |
1359 | free(t); | |
1360 | return 0; | |
1361 | } | |
1362 | ||
1363 | r = rmdir(t); | |
1364 | free(t); | |
1365 | ||
1366 | if (r < 0) | |
1367 | if (errno != ENOENT) | |
1368 | return -errno; | |
1369 | } | |
1370 | ||
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | ||
fb624d04 LP |
1375 | char hexchar(int x) { |
1376 | static const char table[16] = "0123456789abcdef"; | |
1377 | ||
1378 | return table[x & 15]; | |
1379 | } | |
4fe88d28 LP |
1380 | |
1381 | int unhexchar(char c) { | |
1382 | ||
1383 | if (c >= '0' && c <= '9') | |
1384 | return c - '0'; | |
1385 | ||
1386 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1387 | return c - 'a' + 10; |
4fe88d28 LP |
1388 | |
1389 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1390 | return c - 'A' + 10; |
4fe88d28 LP |
1391 | |
1392 | return -1; | |
1393 | } | |
1394 | ||
1395 | char octchar(int x) { | |
1396 | return '0' + (x & 7); | |
1397 | } | |
1398 | ||
1399 | int unoctchar(char c) { | |
1400 | ||
1401 | if (c >= '0' && c <= '7') | |
1402 | return c - '0'; | |
1403 | ||
1404 | return -1; | |
1405 | } | |
1406 | ||
5af98f82 LP |
1407 | char decchar(int x) { |
1408 | return '0' + (x % 10); | |
1409 | } | |
1410 | ||
1411 | int undecchar(char c) { | |
1412 | ||
1413 | if (c >= '0' && c <= '9') | |
1414 | return c - '0'; | |
1415 | ||
1416 | return -1; | |
1417 | } | |
1418 | ||
4fe88d28 LP |
1419 | char *cescape(const char *s) { |
1420 | char *r, *t; | |
1421 | const char *f; | |
1422 | ||
1423 | assert(s); | |
1424 | ||
1425 | /* Does C style string escaping. */ | |
1426 | ||
f8e2fb7b LP |
1427 | r = new(char, strlen(s)*4 + 1); |
1428 | if (!r) | |
4fe88d28 LP |
1429 | return NULL; |
1430 | ||
1431 | for (f = s, t = r; *f; f++) | |
1432 | ||
1433 | switch (*f) { | |
1434 | ||
1435 | case '\a': | |
1436 | *(t++) = '\\'; | |
1437 | *(t++) = 'a'; | |
1438 | break; | |
1439 | case '\b': | |
1440 | *(t++) = '\\'; | |
1441 | *(t++) = 'b'; | |
1442 | break; | |
1443 | case '\f': | |
1444 | *(t++) = '\\'; | |
1445 | *(t++) = 'f'; | |
1446 | break; | |
1447 | case '\n': | |
1448 | *(t++) = '\\'; | |
1449 | *(t++) = 'n'; | |
1450 | break; | |
1451 | case '\r': | |
1452 | *(t++) = '\\'; | |
1453 | *(t++) = 'r'; | |
1454 | break; | |
1455 | case '\t': | |
1456 | *(t++) = '\\'; | |
1457 | *(t++) = 't'; | |
1458 | break; | |
1459 | case '\v': | |
1460 | *(t++) = '\\'; | |
1461 | *(t++) = 'v'; | |
1462 | break; | |
1463 | case '\\': | |
1464 | *(t++) = '\\'; | |
1465 | *(t++) = '\\'; | |
1466 | break; | |
1467 | case '"': | |
1468 | *(t++) = '\\'; | |
1469 | *(t++) = '"'; | |
1470 | break; | |
1471 | case '\'': | |
1472 | *(t++) = '\\'; | |
1473 | *(t++) = '\''; | |
1474 | break; | |
1475 | ||
1476 | default: | |
1477 | /* For special chars we prefer octal over | |
1478 | * hexadecimal encoding, simply because glib's | |
1479 | * g_strescape() does the same */ | |
1480 | if ((*f < ' ') || (*f >= 127)) { | |
1481 | *(t++) = '\\'; | |
1482 | *(t++) = octchar((unsigned char) *f >> 6); | |
1483 | *(t++) = octchar((unsigned char) *f >> 3); | |
1484 | *(t++) = octchar((unsigned char) *f); | |
1485 | } else | |
1486 | *(t++) = *f; | |
1487 | break; | |
1488 | } | |
1489 | ||
1490 | *t = 0; | |
1491 | ||
1492 | return r; | |
1493 | } | |
1494 | ||
5b4c61cd | 1495 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1496 | char *r, *t; |
1497 | const char *f; | |
5b4c61cd | 1498 | size_t pl; |
4fe88d28 LP |
1499 | |
1500 | assert(s); | |
1501 | ||
5b4c61cd LP |
1502 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1503 | ||
1504 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1505 | |
5b4c61cd | 1506 | r = new(char, pl+length+1); |
7f110ff9 | 1507 | if (!r) |
4fe88d28 LP |
1508 | return r; |
1509 | ||
5b4c61cd LP |
1510 | if (prefix) |
1511 | memcpy(r, prefix, pl); | |
1512 | ||
1513 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1514 | |
1515 | if (*f != '\\') { | |
1516 | *(t++) = *f; | |
1517 | continue; | |
1518 | } | |
1519 | ||
1520 | f++; | |
1521 | ||
1522 | switch (*f) { | |
1523 | ||
1524 | case 'a': | |
1525 | *(t++) = '\a'; | |
1526 | break; | |
1527 | case 'b': | |
1528 | *(t++) = '\b'; | |
1529 | break; | |
1530 | case 'f': | |
1531 | *(t++) = '\f'; | |
1532 | break; | |
1533 | case 'n': | |
1534 | *(t++) = '\n'; | |
1535 | break; | |
1536 | case 'r': | |
1537 | *(t++) = '\r'; | |
1538 | break; | |
1539 | case 't': | |
1540 | *(t++) = '\t'; | |
1541 | break; | |
1542 | case 'v': | |
1543 | *(t++) = '\v'; | |
1544 | break; | |
1545 | case '\\': | |
1546 | *(t++) = '\\'; | |
1547 | break; | |
1548 | case '"': | |
1549 | *(t++) = '"'; | |
1550 | break; | |
1551 | case '\'': | |
1552 | *(t++) = '\''; | |
1553 | break; | |
1554 | ||
e167fb86 LP |
1555 | case 's': |
1556 | /* This is an extension of the XDG syntax files */ | |
1557 | *(t++) = ' '; | |
1558 | break; | |
1559 | ||
4fe88d28 LP |
1560 | case 'x': { |
1561 | /* hexadecimal encoding */ | |
1562 | int a, b; | |
1563 | ||
7f110ff9 LP |
1564 | a = unhexchar(f[1]); |
1565 | b = unhexchar(f[2]); | |
1566 | ||
1567 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1568 | /* Invalid escape code, let's take it literal then */ |
1569 | *(t++) = '\\'; | |
1570 | *(t++) = 'x'; | |
1571 | } else { | |
1572 | *(t++) = (char) ((a << 4) | b); | |
1573 | f += 2; | |
1574 | } | |
1575 | ||
1576 | break; | |
1577 | } | |
1578 | ||
1579 | case '0': | |
1580 | case '1': | |
1581 | case '2': | |
1582 | case '3': | |
1583 | case '4': | |
1584 | case '5': | |
1585 | case '6': | |
1586 | case '7': { | |
1587 | /* octal encoding */ | |
1588 | int a, b, c; | |
1589 | ||
7f110ff9 LP |
1590 | a = unoctchar(f[0]); |
1591 | b = unoctchar(f[1]); | |
1592 | c = unoctchar(f[2]); | |
1593 | ||
1594 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1595 | /* Invalid escape code, let's take it literal then */ |
1596 | *(t++) = '\\'; | |
1597 | *(t++) = f[0]; | |
1598 | } else { | |
1599 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1600 | f += 2; | |
1601 | } | |
1602 | ||
1603 | break; | |
1604 | } | |
1605 | ||
1606 | case 0: | |
1607 | /* premature end of string.*/ | |
1608 | *(t++) = '\\'; | |
1609 | goto finish; | |
1610 | ||
1611 | default: | |
1612 | /* Invalid escape code, let's take it literal then */ | |
1613 | *(t++) = '\\'; | |
f3d4cc01 | 1614 | *(t++) = *f; |
4fe88d28 LP |
1615 | break; |
1616 | } | |
1617 | } | |
1618 | ||
1619 | finish: | |
1620 | *t = 0; | |
1621 | return r; | |
1622 | } | |
1623 | ||
5b4c61cd LP |
1624 | char *cunescape_length(const char *s, size_t length) { |
1625 | return cunescape_length_with_prefix(s, length, NULL); | |
1626 | } | |
1627 | ||
6febfd0d | 1628 | char *cunescape(const char *s) { |
5b4c61cd LP |
1629 | assert(s); |
1630 | ||
6febfd0d LP |
1631 | return cunescape_length(s, strlen(s)); |
1632 | } | |
4fe88d28 LP |
1633 | |
1634 | char *xescape(const char *s, const char *bad) { | |
1635 | char *r, *t; | |
1636 | const char *f; | |
1637 | ||
1638 | /* Escapes all chars in bad, in addition to \ and all special | |
1639 | * chars, in \xFF style escaping. May be reversed with | |
1640 | * cunescape. */ | |
1641 | ||
08ace05b LP |
1642 | r = new(char, strlen(s) * 4 + 1); |
1643 | if (!r) | |
4fe88d28 LP |
1644 | return NULL; |
1645 | ||
1646 | for (f = s, t = r; *f; f++) { | |
1647 | ||
b866264a LP |
1648 | if ((*f < ' ') || (*f >= 127) || |
1649 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1650 | *(t++) = '\\'; |
1651 | *(t++) = 'x'; | |
1652 | *(t++) = hexchar(*f >> 4); | |
1653 | *(t++) = hexchar(*f); | |
1654 | } else | |
1655 | *(t++) = *f; | |
1656 | } | |
1657 | ||
1658 | *t = 0; | |
1659 | ||
1660 | return r; | |
1661 | } | |
1662 | ||
ea430986 | 1663 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1664 | char *r, *t; |
1665 | const char *f; | |
1666 | ||
47be870b LP |
1667 | assert(s); |
1668 | ||
ea430986 LP |
1669 | /* Escapes all chars that D-Bus' object path cannot deal |
1670 | * with. Can be reverse with bus_path_unescape() */ | |
1671 | ||
1672 | if (!(r = new(char, strlen(s)*3+1))) | |
1673 | return NULL; | |
1674 | ||
1675 | for (f = s, t = r; *f; f++) { | |
1676 | ||
1677 | if (!(*f >= 'A' && *f <= 'Z') && | |
1678 | !(*f >= 'a' && *f <= 'z') && | |
1679 | !(*f >= '0' && *f <= '9')) { | |
1680 | *(t++) = '_'; | |
1681 | *(t++) = hexchar(*f >> 4); | |
1682 | *(t++) = hexchar(*f); | |
1683 | } else | |
1684 | *(t++) = *f; | |
1685 | } | |
1686 | ||
1687 | *t = 0; | |
1688 | ||
1689 | return r; | |
1690 | } | |
1691 | ||
9e2f7c11 | 1692 | char *bus_path_unescape(const char *f) { |
ea430986 | 1693 | char *r, *t; |
ea430986 | 1694 | |
9e2f7c11 | 1695 | assert(f); |
47be870b | 1696 | |
9e2f7c11 | 1697 | if (!(r = strdup(f))) |
ea430986 LP |
1698 | return NULL; |
1699 | ||
9e2f7c11 | 1700 | for (t = r; *f; f++) { |
ea430986 LP |
1701 | |
1702 | if (*f == '_') { | |
1703 | int a, b; | |
1704 | ||
1705 | if ((a = unhexchar(f[1])) < 0 || | |
1706 | (b = unhexchar(f[2])) < 0) { | |
1707 | /* Invalid escape code, let's take it literal then */ | |
1708 | *(t++) = '_'; | |
1709 | } else { | |
1710 | *(t++) = (char) ((a << 4) | b); | |
1711 | f += 2; | |
1712 | } | |
1713 | } else | |
1714 | *(t++) = *f; | |
1715 | } | |
1716 | ||
1717 | *t = 0; | |
1718 | ||
1719 | return r; | |
1720 | } | |
1721 | ||
67d51650 | 1722 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1723 | char *p; |
1724 | ||
67d51650 | 1725 | assert(t); |
4fe88d28 | 1726 | |
67d51650 | 1727 | for (p = t; *p; p++) |
4fe88d28 LP |
1728 | if (*p >= 'A' && *p <= 'Z') |
1729 | *p = *p - 'A' + 'a'; | |
1730 | ||
67d51650 | 1731 | return t; |
4fe88d28 | 1732 | } |
1dccbe19 | 1733 | |
a228a22f | 1734 | static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1735 | assert(filename); |
1736 | ||
1737 | return | |
1738 | filename[0] == '.' || | |
6c78be3c | 1739 | streq(filename, "lost+found") || |
e472d476 LP |
1740 | streq(filename, "aquota.user") || |
1741 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1742 | endswith(filename, ".rpmnew") || |
1743 | endswith(filename, ".rpmsave") || | |
1744 | endswith(filename, ".rpmorig") || | |
1745 | endswith(filename, ".dpkg-old") || | |
1746 | endswith(filename, ".dpkg-new") || | |
1747 | endswith(filename, ".swp"); | |
1748 | } | |
1749 | ||
a228a22f LP |
1750 | bool ignore_file(const char *filename) { |
1751 | assert(filename); | |
1752 | ||
1753 | if (endswith(filename, "~")) | |
1754 | return false; | |
1755 | ||
1756 | return ignore_file_allow_backup(filename); | |
1757 | } | |
1758 | ||
3a0ecb08 LP |
1759 | int fd_nonblock(int fd, bool nonblock) { |
1760 | int flags; | |
1761 | ||
1762 | assert(fd >= 0); | |
1763 | ||
1764 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1765 | return -errno; | |
1766 | ||
1767 | if (nonblock) | |
1768 | flags |= O_NONBLOCK; | |
1769 | else | |
1770 | flags &= ~O_NONBLOCK; | |
1771 | ||
1772 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1773 | return -errno; | |
1774 | ||
1775 | return 0; | |
1776 | } | |
1777 | ||
1778 | int fd_cloexec(int fd, bool cloexec) { | |
1779 | int flags; | |
1780 | ||
1781 | assert(fd >= 0); | |
1782 | ||
1783 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1784 | return -errno; | |
1785 | ||
1786 | if (cloexec) | |
1787 | flags |= FD_CLOEXEC; | |
1788 | else | |
1789 | flags &= ~FD_CLOEXEC; | |
1790 | ||
1791 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1792 | return -errno; | |
1793 | ||
1794 | return 0; | |
1795 | } | |
1796 | ||
b19be9eb LP |
1797 | static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
1798 | unsigned i; | |
1799 | ||
1800 | assert(n_fdset == 0 || fdset); | |
1801 | ||
1802 | for (i = 0; i < n_fdset; i++) | |
1803 | if (fdset[i] == fd) | |
1804 | return true; | |
1805 | ||
1806 | return false; | |
1807 | } | |
1808 | ||
a0d40ac5 LP |
1809 | int close_all_fds(const int except[], unsigned n_except) { |
1810 | DIR *d; | |
1811 | struct dirent *de; | |
1812 | int r = 0; | |
1813 | ||
b19be9eb LP |
1814 | assert(n_except == 0 || except); |
1815 | ||
1816 | d = opendir("/proc/self/fd"); | |
1817 | if (!d) { | |
1818 | int fd; | |
1819 | struct rlimit rl; | |
1820 | ||
1821 | /* When /proc isn't available (for example in chroots) | |
1822 | * the fallback is brute forcing through the fd | |
1823 | * table */ | |
1824 | ||
1825 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1826 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1827 | ||
1828 | if (fd_in_set(fd, except, n_except)) | |
1829 | continue; | |
1830 | ||
1831 | if (close_nointr(fd) < 0) | |
1832 | if (errno != EBADF && r == 0) | |
1833 | r = -errno; | |
1834 | } | |
1835 | ||
1836 | return r; | |
1837 | } | |
a0d40ac5 LP |
1838 | |
1839 | while ((de = readdir(d))) { | |
a7610064 | 1840 | int fd = -1; |
a0d40ac5 | 1841 | |
a16e1123 | 1842 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1843 | continue; |
1844 | ||
720ce21d LP |
1845 | if (safe_atoi(de->d_name, &fd) < 0) |
1846 | /* Let's better ignore this, just in case */ | |
1847 | continue; | |
a0d40ac5 LP |
1848 | |
1849 | if (fd < 3) | |
1850 | continue; | |
1851 | ||
1852 | if (fd == dirfd(d)) | |
1853 | continue; | |
1854 | ||
b19be9eb LP |
1855 | if (fd_in_set(fd, except, n_except)) |
1856 | continue; | |
a0d40ac5 | 1857 | |
720ce21d | 1858 | if (close_nointr(fd) < 0) { |
2f357920 | 1859 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1860 | if (errno != EBADF && r == 0) |
1861 | r = -errno; | |
2f357920 | 1862 | } |
a0d40ac5 LP |
1863 | } |
1864 | ||
a0d40ac5 LP |
1865 | closedir(d); |
1866 | return r; | |
1867 | } | |
1868 | ||
db12775d LP |
1869 | bool chars_intersect(const char *a, const char *b) { |
1870 | const char *p; | |
1871 | ||
1872 | /* Returns true if any of the chars in a are in b. */ | |
1873 | for (p = a; *p; p++) | |
1874 | if (strchr(b, *p)) | |
1875 | return true; | |
1876 | ||
1877 | return false; | |
1878 | } | |
1879 | ||
42856c10 | 1880 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
1881 | static const char table[] = |
1882 | "cifs\0" | |
1883 | "smbfs\0" | |
1884 | "ncpfs\0" | |
1885 | "nfs\0" | |
1886 | "nfs4\0" | |
1887 | "gfs\0" | |
73836c5c | 1888 | "gfs2\0"; |
42856c10 | 1889 | |
a05f97b3 | 1890 | return nulstr_contains(table, fstype); |
42856c10 LP |
1891 | } |
1892 | ||
601f6a1e | 1893 | int chvt(int vt) { |
a05f97b3 | 1894 | _cleanup_close_ int fd; |
601f6a1e | 1895 | |
a05f97b3 LP |
1896 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1897 | if (fd < 0) | |
601f6a1e LP |
1898 | return -errno; |
1899 | ||
1900 | if (vt < 0) { | |
1901 | int tiocl[2] = { | |
1902 | TIOCL_GETKMSGREDIRECT, | |
1903 | 0 | |
1904 | }; | |
1905 | ||
a05f97b3 LP |
1906 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1907 | return -errno; | |
601f6a1e LP |
1908 | |
1909 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1910 | } | |
1911 | ||
1912 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1913 | return -errno; |
601f6a1e | 1914 | |
a05f97b3 | 1915 | return 0; |
601f6a1e LP |
1916 | } |
1917 | ||
8f2d43a0 | 1918 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
1919 | struct termios old_termios, new_termios; |
1920 | char c; | |
20c03b7b | 1921 | char line[LINE_MAX]; |
80876c20 LP |
1922 | |
1923 | assert(f); | |
1924 | assert(ret); | |
1925 | ||
1926 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1927 | new_termios = old_termios; | |
1928 | ||
1929 | new_termios.c_lflag &= ~ICANON; | |
1930 | new_termios.c_cc[VMIN] = 1; | |
1931 | new_termios.c_cc[VTIME] = 0; | |
1932 | ||
1933 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1934 | size_t k; | |
1935 | ||
8f2d43a0 LP |
1936 | if (t != (usec_t) -1) { |
1937 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
1938 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1939 | return -ETIMEDOUT; | |
1940 | } | |
1941 | } | |
1942 | ||
80876c20 LP |
1943 | k = fread(&c, 1, 1, f); |
1944 | ||
1945 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1946 | ||
1947 | if (k <= 0) | |
1948 | return -EIO; | |
1949 | ||
1950 | if (need_nl) | |
1951 | *need_nl = c != '\n'; | |
1952 | ||
1953 | *ret = c; | |
1954 | return 0; | |
1955 | } | |
1956 | } | |
1957 | ||
8f2d43a0 LP |
1958 | if (t != (usec_t) -1) |
1959 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
1960 | return -ETIMEDOUT; | |
1961 | ||
1962 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
1963 | return -EIO; |
1964 | ||
1965 | truncate_nl(line); | |
1966 | ||
1967 | if (strlen(line) != 1) | |
1968 | return -EBADMSG; | |
1969 | ||
1970 | if (need_nl) | |
1971 | *need_nl = false; | |
1972 | ||
1973 | *ret = line[0]; | |
1974 | return 0; | |
1975 | } | |
1976 | ||
1977 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 | 1978 | |
80876c20 LP |
1979 | assert(ret); |
1980 | assert(replies); | |
1981 | assert(text); | |
1982 | ||
1983 | for (;;) { | |
1984 | va_list ap; | |
1985 | char c; | |
1986 | int r; | |
1987 | bool need_nl = true; | |
1988 | ||
8481248b | 1989 | if (on_tty()) |
c1072ea0 | 1990 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1991 | |
80876c20 LP |
1992 | va_start(ap, text); |
1993 | vprintf(text, ap); | |
1994 | va_end(ap); | |
1995 | ||
8481248b | 1996 | if (on_tty()) |
c1072ea0 | 1997 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1998 | |
80876c20 LP |
1999 | fflush(stdout); |
2000 | ||
8f2d43a0 LP |
2001 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
2002 | if (r < 0) { | |
80876c20 LP |
2003 | |
2004 | if (r == -EBADMSG) { | |
2005 | puts("Bad input, please try again."); | |
2006 | continue; | |
2007 | } | |
2008 | ||
2009 | putchar('\n'); | |
2010 | return r; | |
2011 | } | |
2012 | ||
2013 | if (need_nl) | |
2014 | putchar('\n'); | |
2015 | ||
2016 | if (strchr(replies, c)) { | |
2017 | *ret = c; | |
2018 | return 0; | |
2019 | } | |
2020 | ||
2021 | puts("Read unexpected character, please try again."); | |
2022 | } | |
2023 | } | |
2024 | ||
512947d4 | 2025 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
2026 | struct termios termios; |
2027 | int r = 0; | |
3fe5e5d4 LP |
2028 | |
2029 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
2030 | |
2031 | assert(fd >= 0); | |
2032 | ||
eed1d0e3 LP |
2033 | /* We leave locked terminal attributes untouched, so that |
2034 | * Plymouth may set whatever it wants to set, and we don't | |
2035 | * interfere with that. */ | |
3fe5e5d4 LP |
2036 | |
2037 | /* Disable exclusive mode, just in case */ | |
2038 | ioctl(fd, TIOCNXCL); | |
2039 | ||
5c0100a5 | 2040 | /* Switch to text mode */ |
512947d4 MS |
2041 | if (switch_to_text) |
2042 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 2043 | |
3fe5e5d4 | 2044 | /* Enable console unicode mode */ |
df465b3f | 2045 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
2046 | |
2047 | if (tcgetattr(fd, &termios) < 0) { | |
2048 | r = -errno; | |
2049 | goto finish; | |
2050 | } | |
2051 | ||
aaf694ca LP |
2052 | /* We only reset the stuff that matters to the software. How |
2053 | * hardware is set up we don't touch assuming that somebody | |
2054 | * else will do that for us */ | |
2055 | ||
2056 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
2057 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
2058 | termios.c_oflag |= ONLCR; | |
2059 | termios.c_cflag |= CREAD; | |
2060 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
2061 | ||
2062 | termios.c_cc[VINTR] = 03; /* ^C */ | |
2063 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
2064 | termios.c_cc[VERASE] = 0177; | |
2065 | termios.c_cc[VKILL] = 025; /* ^X */ | |
2066 | termios.c_cc[VEOF] = 04; /* ^D */ | |
2067 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
2068 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
2069 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
2070 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
2071 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
2072 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
2073 | termios.c_cc[VEOL] = 0; |
2074 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
2075 | |
2076 | termios.c_cc[VTIME] = 0; | |
2077 | termios.c_cc[VMIN] = 1; | |
2078 | ||
2079 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
2080 | r = -errno; | |
2081 | ||
2082 | finish: | |
2083 | /* Just in case, flush all crap out */ | |
2084 | tcflush(fd, TCIOFLUSH); | |
2085 | ||
2086 | return r; | |
2087 | } | |
2088 | ||
6ea832a2 LP |
2089 | int reset_terminal(const char *name) { |
2090 | int fd, r; | |
2091 | ||
2092 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
2093 | if (fd < 0) | |
2094 | return fd; | |
2095 | ||
512947d4 | 2096 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
2097 | close_nointr_nofail(fd); |
2098 | ||
2099 | return r; | |
2100 | } | |
2101 | ||
80876c20 LP |
2102 | int open_terminal(const char *name, int mode) { |
2103 | int fd, r; | |
f73f76ac | 2104 | unsigned c = 0; |
80876c20 | 2105 | |
f73f76ac LP |
2106 | /* |
2107 | * If a TTY is in the process of being closed opening it might | |
2108 | * cause EIO. This is horribly awful, but unlikely to be | |
2109 | * changed in the kernel. Hence we work around this problem by | |
2110 | * retrying a couple of times. | |
2111 | * | |
2112 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
2113 | */ | |
2114 | ||
2115 | for (;;) { | |
af6da548 LP |
2116 | fd = open(name, mode); |
2117 | if (fd >= 0) | |
f73f76ac LP |
2118 | break; |
2119 | ||
2120 | if (errno != EIO) | |
2121 | return -errno; | |
2122 | ||
af6da548 | 2123 | /* Max 1s in total */ |
f73f76ac LP |
2124 | if (c >= 20) |
2125 | return -errno; | |
2126 | ||
2127 | usleep(50 * USEC_PER_MSEC); | |
2128 | c++; | |
2129 | } | |
2130 | ||
2131 | if (fd < 0) | |
80876c20 LP |
2132 | return -errno; |
2133 | ||
af6da548 LP |
2134 | r = isatty(fd); |
2135 | if (r < 0) { | |
80876c20 LP |
2136 | close_nointr_nofail(fd); |
2137 | return -errno; | |
2138 | } | |
2139 | ||
2140 | if (!r) { | |
2141 | close_nointr_nofail(fd); | |
2142 | return -ENOTTY; | |
2143 | } | |
2144 | ||
2145 | return fd; | |
2146 | } | |
2147 | ||
2148 | int flush_fd(int fd) { | |
2149 | struct pollfd pollfd; | |
2150 | ||
2151 | zero(pollfd); | |
2152 | pollfd.fd = fd; | |
2153 | pollfd.events = POLLIN; | |
2154 | ||
2155 | for (;;) { | |
20c03b7b | 2156 | char buf[LINE_MAX]; |
80876c20 LP |
2157 | ssize_t l; |
2158 | int r; | |
2159 | ||
2160 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2161 | ||
2162 | if (errno == EINTR) | |
2163 | continue; | |
2164 | ||
2165 | return -errno; | |
2166 | } | |
2167 | ||
2168 | if (r == 0) | |
2169 | return 0; | |
2170 | ||
2171 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2172 | ||
2173 | if (errno == EINTR) | |
2174 | continue; | |
2175 | ||
2176 | if (errno == EAGAIN) | |
2177 | return 0; | |
2178 | ||
2179 | return -errno; | |
2180 | } | |
2181 | ||
2182 | if (l <= 0) | |
2183 | return 0; | |
2184 | } | |
2185 | } | |
2186 | ||
af6da548 LP |
2187 | int acquire_terminal( |
2188 | const char *name, | |
2189 | bool fail, | |
2190 | bool force, | |
2191 | bool ignore_tiocstty_eperm, | |
2192 | usec_t timeout) { | |
2193 | ||
4a0ff478 | 2194 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 2195 | usec_t ts = 0; |
32c4bef8 | 2196 | struct sigaction sa_old, sa_new; |
80876c20 LP |
2197 | |
2198 | assert(name); | |
2199 | ||
2200 | /* We use inotify to be notified when the tty is closed. We | |
2201 | * create the watch before checking if we can actually acquire | |
2202 | * it, so that we don't lose any event. | |
2203 | * | |
2204 | * Note: strictly speaking this actually watches for the | |
2205 | * device being closed, it does *not* really watch whether a | |
2206 | * tty loses its controlling process. However, unless some | |
2207 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2208 | * its tty otherwise this will not become a problem. As long | |
2209 | * as the administrator makes sure not configure any service | |
2210 | * on the same tty as an untrusted user this should not be a | |
2211 | * problem. (Which he probably should not do anyway.) */ | |
2212 | ||
af6da548 LP |
2213 | if (timeout != (usec_t) -1) |
2214 | ts = now(CLOCK_MONOTONIC); | |
2215 | ||
80876c20 | 2216 | if (!fail && !force) { |
af6da548 LP |
2217 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
2218 | if (notify < 0) { | |
80876c20 LP |
2219 | r = -errno; |
2220 | goto fail; | |
2221 | } | |
2222 | ||
af6da548 LP |
2223 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
2224 | if (wd < 0) { | |
80876c20 LP |
2225 | r = -errno; |
2226 | goto fail; | |
2227 | } | |
2228 | } | |
2229 | ||
2230 | for (;;) { | |
af6da548 LP |
2231 | if (notify >= 0) { |
2232 | r = flush_fd(notify); | |
2233 | if (r < 0) | |
e3d1855b | 2234 | goto fail; |
af6da548 | 2235 | } |
80876c20 LP |
2236 | |
2237 | /* We pass here O_NOCTTY only so that we can check the return | |
2238 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2239 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
2240 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
2241 | if (fd < 0) | |
6ea832a2 | 2242 | return fd; |
80876c20 | 2243 | |
32c4bef8 LP |
2244 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2245 | * if we already own the tty. */ | |
2246 | zero(sa_new); | |
2247 | sa_new.sa_handler = SIG_IGN; | |
2248 | sa_new.sa_flags = SA_RESTART; | |
2249 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2250 | ||
80876c20 | 2251 | /* First, try to get the tty */ |
32c4bef8 LP |
2252 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
2253 | r = -errno; | |
2254 | ||
2255 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
2256 | |
2257 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2258 | * returning EPERM, i.e. when very likely we already | |
2259 | * are have this controlling terminal. */ | |
32c4bef8 | 2260 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
2261 | r = 0; |
2262 | ||
32c4bef8 | 2263 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
2264 | goto fail; |
2265 | } | |
2266 | ||
2267 | if (r >= 0) | |
2268 | break; | |
2269 | ||
2270 | assert(!fail); | |
2271 | assert(!force); | |
2272 | assert(notify >= 0); | |
2273 | ||
2274 | for (;;) { | |
f601daa7 | 2275 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 2276 | ssize_t l; |
f601daa7 | 2277 | struct inotify_event *e; |
80876c20 | 2278 | |
af6da548 LP |
2279 | if (timeout != (usec_t) -1) { |
2280 | usec_t n; | |
2281 | ||
2282 | n = now(CLOCK_MONOTONIC); | |
2283 | if (ts + timeout < n) { | |
2284 | r = -ETIMEDOUT; | |
2285 | goto fail; | |
2286 | } | |
2287 | ||
2288 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
2289 | if (r < 0) | |
2290 | goto fail; | |
2291 | ||
2292 | if (r == 0) { | |
2293 | r = -ETIMEDOUT; | |
2294 | goto fail; | |
2295 | } | |
2296 | } | |
2297 | ||
2298 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
2299 | if (l < 0) { | |
80876c20 | 2300 | |
af6da548 | 2301 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
2302 | continue; |
2303 | ||
2304 | r = -errno; | |
2305 | goto fail; | |
2306 | } | |
2307 | ||
2308 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2309 | |
f601daa7 LP |
2310 | while (l > 0) { |
2311 | size_t step; | |
80876c20 | 2312 | |
f601daa7 | 2313 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2314 | r = -EIO; |
f601daa7 LP |
2315 | goto fail; |
2316 | } | |
80876c20 | 2317 | |
f601daa7 LP |
2318 | step = sizeof(struct inotify_event) + e->len; |
2319 | assert(step <= (size_t) l); | |
80876c20 | 2320 | |
f601daa7 LP |
2321 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2322 | l -= step; | |
80876c20 LP |
2323 | } |
2324 | ||
2325 | break; | |
2326 | } | |
2327 | ||
2328 | /* We close the tty fd here since if the old session | |
2329 | * ended our handle will be dead. It's important that | |
2330 | * we do this after sleeping, so that we don't enter | |
2331 | * an endless loop. */ | |
2332 | close_nointr_nofail(fd); | |
2333 | } | |
2334 | ||
2335 | if (notify >= 0) | |
a16e1123 | 2336 | close_nointr_nofail(notify); |
80876c20 | 2337 | |
512947d4 MS |
2338 | r = reset_terminal_fd(fd, true); |
2339 | if (r < 0) | |
80876c20 LP |
2340 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2341 | ||
2342 | return fd; | |
2343 | ||
2344 | fail: | |
2345 | if (fd >= 0) | |
a16e1123 | 2346 | close_nointr_nofail(fd); |
80876c20 LP |
2347 | |
2348 | if (notify >= 0) | |
a16e1123 | 2349 | close_nointr_nofail(notify); |
80876c20 LP |
2350 | |
2351 | return r; | |
2352 | } | |
2353 | ||
2354 | int release_terminal(void) { | |
2355 | int r = 0, fd; | |
57cd2192 | 2356 | struct sigaction sa_old, sa_new; |
80876c20 | 2357 | |
ccaa6149 | 2358 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0) |
80876c20 LP |
2359 | return -errno; |
2360 | ||
57cd2192 LP |
2361 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2362 | * by our own TIOCNOTTY */ | |
2363 | ||
2364 | zero(sa_new); | |
2365 | sa_new.sa_handler = SIG_IGN; | |
2366 | sa_new.sa_flags = SA_RESTART; | |
2367 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2368 | ||
80876c20 LP |
2369 | if (ioctl(fd, TIOCNOTTY) < 0) |
2370 | r = -errno; | |
2371 | ||
57cd2192 LP |
2372 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2373 | ||
80876c20 LP |
2374 | close_nointr_nofail(fd); |
2375 | return r; | |
2376 | } | |
2377 | ||
9a34ec5f LP |
2378 | int sigaction_many(const struct sigaction *sa, ...) { |
2379 | va_list ap; | |
2380 | int r = 0, sig; | |
2381 | ||
2382 | va_start(ap, sa); | |
2383 | while ((sig = va_arg(ap, int)) > 0) | |
2384 | if (sigaction(sig, sa, NULL) < 0) | |
2385 | r = -errno; | |
2386 | va_end(ap); | |
2387 | ||
2388 | return r; | |
2389 | } | |
2390 | ||
2391 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2392 | struct sigaction sa; |
9a34ec5f LP |
2393 | va_list ap; |
2394 | int r = 0; | |
a337c6fc LP |
2395 | |
2396 | zero(sa); | |
2397 | sa.sa_handler = SIG_IGN; | |
2398 | sa.sa_flags = SA_RESTART; | |
2399 | ||
9a34ec5f LP |
2400 | if (sigaction(sig, &sa, NULL) < 0) |
2401 | r = -errno; | |
2402 | ||
2403 | va_start(ap, sig); | |
2404 | while ((sig = va_arg(ap, int)) > 0) | |
2405 | if (sigaction(sig, &sa, NULL) < 0) | |
2406 | r = -errno; | |
2407 | va_end(ap); | |
2408 | ||
2409 | return r; | |
2410 | } | |
2411 | ||
2412 | int default_signals(int sig, ...) { | |
2413 | struct sigaction sa; | |
2414 | va_list ap; | |
2415 | int r = 0; | |
2416 | ||
2417 | zero(sa); | |
2418 | sa.sa_handler = SIG_DFL; | |
2419 | sa.sa_flags = SA_RESTART; | |
2420 | ||
2421 | if (sigaction(sig, &sa, NULL) < 0) | |
2422 | r = -errno; | |
2423 | ||
2424 | va_start(ap, sig); | |
2425 | while ((sig = va_arg(ap, int)) > 0) | |
2426 | if (sigaction(sig, &sa, NULL) < 0) | |
2427 | r = -errno; | |
2428 | va_end(ap); | |
2429 | ||
2430 | return r; | |
a337c6fc LP |
2431 | } |
2432 | ||
8d567588 LP |
2433 | int close_pipe(int p[]) { |
2434 | int a = 0, b = 0; | |
2435 | ||
2436 | assert(p); | |
2437 | ||
2438 | if (p[0] >= 0) { | |
2439 | a = close_nointr(p[0]); | |
2440 | p[0] = -1; | |
2441 | } | |
2442 | ||
2443 | if (p[1] >= 0) { | |
2444 | b = close_nointr(p[1]); | |
2445 | p[1] = -1; | |
2446 | } | |
2447 | ||
2448 | return a < 0 ? a : b; | |
2449 | } | |
2450 | ||
eb22ac37 | 2451 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2452 | uint8_t *p; |
2453 | ssize_t n = 0; | |
2454 | ||
2455 | assert(fd >= 0); | |
2456 | assert(buf); | |
2457 | ||
2458 | p = buf; | |
2459 | ||
2460 | while (nbytes > 0) { | |
2461 | ssize_t k; | |
2462 | ||
2463 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2464 | ||
eb22ac37 | 2465 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2466 | continue; |
2467 | ||
eb22ac37 | 2468 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2469 | struct pollfd pollfd; |
2470 | ||
2471 | zero(pollfd); | |
2472 | pollfd.fd = fd; | |
2473 | pollfd.events = POLLIN; | |
2474 | ||
2475 | if (poll(&pollfd, 1, -1) < 0) { | |
2476 | if (errno == EINTR) | |
2477 | continue; | |
2478 | ||
2479 | return n > 0 ? n : -errno; | |
2480 | } | |
2481 | ||
2482 | if (pollfd.revents != POLLIN) | |
2483 | return n > 0 ? n : -EIO; | |
2484 | ||
2485 | continue; | |
2486 | } | |
2487 | ||
2488 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2489 | } | |
2490 | ||
2491 | p += k; | |
2492 | nbytes -= k; | |
2493 | n += k; | |
2494 | } | |
2495 | ||
2496 | return n; | |
2497 | } | |
2498 | ||
eb22ac37 LP |
2499 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2500 | const uint8_t *p; | |
2501 | ssize_t n = 0; | |
2502 | ||
2503 | assert(fd >= 0); | |
2504 | assert(buf); | |
2505 | ||
2506 | p = buf; | |
2507 | ||
2508 | while (nbytes > 0) { | |
2509 | ssize_t k; | |
2510 | ||
fe652127 LP |
2511 | k = write(fd, p, nbytes); |
2512 | if (k <= 0) { | |
eb22ac37 LP |
2513 | |
2514 | if (k < 0 && errno == EINTR) | |
2515 | continue; | |
2516 | ||
2517 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2518 | struct pollfd pollfd; | |
2519 | ||
2520 | zero(pollfd); | |
2521 | pollfd.fd = fd; | |
2522 | pollfd.events = POLLOUT; | |
2523 | ||
2524 | if (poll(&pollfd, 1, -1) < 0) { | |
2525 | if (errno == EINTR) | |
2526 | continue; | |
2527 | ||
2528 | return n > 0 ? n : -errno; | |
2529 | } | |
2530 | ||
2531 | if (pollfd.revents != POLLOUT) | |
2532 | return n > 0 ? n : -EIO; | |
2533 | ||
2534 | continue; | |
2535 | } | |
2536 | ||
2537 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2538 | } | |
2539 | ||
2540 | p += k; | |
2541 | nbytes -= k; | |
2542 | n += k; | |
2543 | } | |
2544 | ||
2545 | return n; | |
2546 | } | |
2547 | ||
ab1f0633 LP |
2548 | int parse_bytes(const char *t, off_t *bytes) { |
2549 | static const struct { | |
2550 | const char *suffix; | |
2551 | off_t factor; | |
2552 | } table[] = { | |
2553 | { "B", 1 }, | |
2554 | { "K", 1024ULL }, | |
2555 | { "M", 1024ULL*1024ULL }, | |
2556 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2557 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2558 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2559 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2560 | { "", 1 }, |
2561 | }; | |
2562 | ||
2563 | const char *p; | |
2564 | off_t r = 0; | |
2565 | ||
2566 | assert(t); | |
2567 | assert(bytes); | |
2568 | ||
2569 | p = t; | |
2570 | do { | |
2571 | long long l; | |
2572 | char *e; | |
2573 | unsigned i; | |
2574 | ||
2575 | errno = 0; | |
2576 | l = strtoll(p, &e, 10); | |
2577 | ||
2578 | if (errno != 0) | |
2579 | return -errno; | |
2580 | ||
2581 | if (l < 0) | |
2582 | return -ERANGE; | |
2583 | ||
2584 | if (e == p) | |
2585 | return -EINVAL; | |
2586 | ||
2587 | e += strspn(e, WHITESPACE); | |
2588 | ||
2589 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2590 | if (startswith(e, table[i].suffix)) { | |
2591 | r += (off_t) l * table[i].factor; | |
2592 | p = e + strlen(table[i].suffix); | |
2593 | break; | |
2594 | } | |
2595 | ||
2596 | if (i >= ELEMENTSOF(table)) | |
2597 | return -EINVAL; | |
2598 | ||
2599 | } while (*p != 0); | |
2600 | ||
2601 | *bytes = r; | |
2602 | ||
2603 | return 0; | |
2604 | } | |
2605 | ||
843d2643 LP |
2606 | int make_stdio(int fd) { |
2607 | int r, s, t; | |
2608 | ||
2609 | assert(fd >= 0); | |
2610 | ||
73836c5c LP |
2611 | r = dup3(fd, STDIN_FILENO, 0); |
2612 | s = dup3(fd, STDOUT_FILENO, 0); | |
2613 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2614 | |
2615 | if (fd >= 3) | |
2616 | close_nointr_nofail(fd); | |
2617 | ||
2618 | if (r < 0 || s < 0 || t < 0) | |
2619 | return -errno; | |
2620 | ||
73836c5c | 2621 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2622 | |
843d2643 LP |
2623 | return 0; |
2624 | } | |
2625 | ||
ade509ce LP |
2626 | int make_null_stdio(void) { |
2627 | int null_fd; | |
2628 | ||
cd3bd60a LP |
2629 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2630 | if (null_fd < 0) | |
ade509ce LP |
2631 | return -errno; |
2632 | ||
2633 | return make_stdio(null_fd); | |
2634 | } | |
2635 | ||
8407a5d0 LP |
2636 | bool is_device_path(const char *path) { |
2637 | ||
2638 | /* Returns true on paths that refer to a device, either in | |
2639 | * sysfs or in /dev */ | |
2640 | ||
2641 | return | |
2642 | path_startswith(path, "/dev/") || | |
2643 | path_startswith(path, "/sys/"); | |
2644 | } | |
2645 | ||
01f78473 | 2646 | int dir_is_empty(const char *path) { |
a05f97b3 | 2647 | _cleanup_closedir_ DIR *d; |
01f78473 | 2648 | int r; |
01f78473 | 2649 | |
a05f97b3 LP |
2650 | d = opendir(path); |
2651 | if (!d) | |
01f78473 LP |
2652 | return -errno; |
2653 | ||
2654 | for (;;) { | |
7d5e9c0f LP |
2655 | struct dirent *de; |
2656 | union dirent_storage buf; | |
01f78473 | 2657 | |
7d5e9c0f | 2658 | r = readdir_r(d, &buf.de, &de); |
a05f97b3 LP |
2659 | if (r > 0) |
2660 | return -r; | |
01f78473 | 2661 | |
a05f97b3 LP |
2662 | if (!de) |
2663 | return 1; | |
01f78473 | 2664 | |
a05f97b3 LP |
2665 | if (!ignore_file(de->d_name)) |
2666 | return 0; | |
2667 | } | |
01f78473 LP |
2668 | } |
2669 | ||
d3782d60 | 2670 | unsigned long long random_ull(void) { |
a05f97b3 | 2671 | _cleanup_close_ int fd; |
d3782d60 LP |
2672 | uint64_t ull; |
2673 | ssize_t r; | |
2674 | ||
ac0930c8 LP |
2675 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2676 | if (fd < 0) | |
d3782d60 LP |
2677 | goto fallback; |
2678 | ||
eb22ac37 | 2679 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
2680 | if (r != sizeof(ull)) |
2681 | goto fallback; | |
2682 | ||
2683 | return ull; | |
2684 | ||
2685 | fallback: | |
2686 | return random() * RAND_MAX + random(); | |
2687 | } | |
2688 | ||
5b6319dc LP |
2689 | void rename_process(const char name[8]) { |
2690 | assert(name); | |
2691 | ||
5d6b1584 LP |
2692 | /* This is a like a poor man's setproctitle(). It changes the |
2693 | * comm field, argv[0], and also the glibc's internally used | |
2694 | * name of the process. For the first one a limit of 16 chars | |
2695 | * applies, to the second one usually one of 10 (i.e. length | |
2696 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2697 | * "systemd"). If you pass a longer string it will be | |
2698 | * truncated */ | |
5b6319dc | 2699 | |
5d6b1584 | 2700 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2701 | |
2702 | if (program_invocation_name) | |
2703 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2704 | |
2705 | if (saved_argc > 0) { | |
2706 | int i; | |
2707 | ||
2708 | if (saved_argv[0]) | |
2709 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2710 | ||
2711 | for (i = 1; i < saved_argc; i++) { | |
2712 | if (!saved_argv[i]) | |
2713 | break; | |
2714 | ||
2715 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
2716 | } | |
2717 | } | |
5b6319dc LP |
2718 | } |
2719 | ||
7d793605 LP |
2720 | void sigset_add_many(sigset_t *ss, ...) { |
2721 | va_list ap; | |
2722 | int sig; | |
2723 | ||
2724 | assert(ss); | |
2725 | ||
2726 | va_start(ap, ss); | |
2727 | while ((sig = va_arg(ap, int)) > 0) | |
2728 | assert_se(sigaddset(ss, sig) == 0); | |
2729 | va_end(ap); | |
2730 | } | |
2731 | ||
ef2f1067 LP |
2732 | char* gethostname_malloc(void) { |
2733 | struct utsname u; | |
2734 | ||
2735 | assert_se(uname(&u) >= 0); | |
2736 | ||
344de609 | 2737 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2738 | return strdup(u.nodename); |
2739 | ||
2740 | return strdup(u.sysname); | |
2741 | } | |
2742 | ||
344de609 LP |
2743 | bool hostname_is_set(void) { |
2744 | struct utsname u; | |
2745 | ||
2746 | assert_se(uname(&u) >= 0); | |
2747 | ||
2748 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2749 | } | |
2750 | ||
7c5f152a | 2751 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2752 | long bufsize; |
a05f97b3 LP |
2753 | char *name; |
2754 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2755 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2756 | |
2757 | /* Shortcut things to avoid NSS lookups */ | |
2758 | if (uid == 0) | |
2759 | return strdup("root"); | |
2760 | ||
7c5f152a LP |
2761 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2762 | if (bufsize <= 0) | |
ef2f1067 LP |
2763 | bufsize = 4096; |
2764 | ||
7c5f152a LP |
2765 | buf = malloc(bufsize); |
2766 | if (!buf) | |
ef2f1067 LP |
2767 | return NULL; |
2768 | ||
a05f97b3 LP |
2769 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2770 | return strdup(pw->pw_name); | |
ef2f1067 LP |
2771 | |
2772 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
2773 | return NULL; | |
2774 | ||
2775 | return name; | |
2776 | } | |
2777 | ||
7c5f152a LP |
2778 | char* getlogname_malloc(void) { |
2779 | uid_t uid; | |
2780 | struct stat st; | |
2781 | ||
2782 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2783 | uid = st.st_uid; | |
2784 | else | |
2785 | uid = getuid(); | |
2786 | ||
2787 | return lookup_uid(uid); | |
2788 | } | |
2789 | ||
2790 | char *getusername_malloc(void) { | |
2791 | const char *e; | |
2792 | ||
2793 | e = getenv("USER"); | |
2794 | if (e) | |
2795 | return strdup(e); | |
2796 | ||
2797 | return lookup_uid(getuid()); | |
2798 | } | |
2799 | ||
fc116c6a LP |
2800 | int getttyname_malloc(int fd, char **r) { |
2801 | char path[PATH_MAX], *c; | |
618e02c7 | 2802 | int k; |
8c6db833 LP |
2803 | |
2804 | assert(r); | |
ef2f1067 | 2805 | |
a05f97b3 LP |
2806 | k = ttyname_r(fd, path, sizeof(path)); |
2807 | if (k != 0) | |
618e02c7 | 2808 | return -k; |
ef2f1067 LP |
2809 | |
2810 | char_array_0(path); | |
2811 | ||
a05f97b3 LP |
2812 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2813 | if (!c) | |
8c6db833 LP |
2814 | return -ENOMEM; |
2815 | ||
2816 | *r = c; | |
2817 | return 0; | |
2818 | } | |
2819 | ||
fc116c6a LP |
2820 | int getttyname_harder(int fd, char **r) { |
2821 | int k; | |
2822 | char *s; | |
2823 | ||
a05f97b3 LP |
2824 | k = getttyname_malloc(fd, &s); |
2825 | if (k < 0) | |
fc116c6a LP |
2826 | return k; |
2827 | ||
2828 | if (streq(s, "tty")) { | |
2829 | free(s); | |
4d6d6518 | 2830 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2831 | } |
2832 | ||
2833 | *r = s; | |
2834 | return 0; | |
2835 | } | |
2836 | ||
4d6d6518 | 2837 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
fc116c6a | 2838 | int k; |
4d6d6518 | 2839 | char line[LINE_MAX], *p, *fn; |
fc116c6a LP |
2840 | unsigned long ttynr; |
2841 | FILE *f; | |
2842 | ||
4d6d6518 LP |
2843 | if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0) |
2844 | return -ENOMEM; | |
2845 | ||
2846 | f = fopen(fn, "re"); | |
2847 | free(fn); | |
2848 | if (!f) | |
fc116c6a LP |
2849 | return -errno; |
2850 | ||
4d6d6518 | 2851 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 2852 | k = feof(f) ? -EIO : -errno; |
fc116c6a LP |
2853 | fclose(f); |
2854 | return k; | |
2855 | } | |
2856 | ||
2857 | fclose(f); | |
2858 | ||
4d6d6518 LP |
2859 | p = strrchr(line, ')'); |
2860 | if (!p) | |
fc116c6a LP |
2861 | return -EIO; |
2862 | ||
2863 | p++; | |
2864 | ||
2865 | if (sscanf(p, " " | |
2866 | "%*c " /* state */ | |
2867 | "%*d " /* ppid */ | |
2868 | "%*d " /* pgrp */ | |
2869 | "%*d " /* session */ | |
2870 | "%lu ", /* ttynr */ | |
2871 | &ttynr) != 1) | |
2872 | return -EIO; | |
2873 | ||
11dc5d2b LP |
2874 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2875 | return -ENOENT; | |
2876 | ||
fc116c6a LP |
2877 | *d = (dev_t) ttynr; |
2878 | return 0; | |
2879 | } | |
2880 | ||
4d6d6518 | 2881 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 2882 | int k; |
20c03b7b | 2883 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
2884 | dev_t devnr; |
2885 | ||
2886 | assert(r); | |
2887 | ||
4d6d6518 LP |
2888 | k = get_ctty_devnr(pid, &devnr); |
2889 | if (k < 0) | |
fc116c6a LP |
2890 | return k; |
2891 | ||
2892 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
2893 | char_array_0(fn); | |
2894 | ||
23406ce5 LP |
2895 | k = readlink_malloc(fn, &s); |
2896 | if (k < 0) { | |
fc116c6a LP |
2897 | |
2898 | if (k != -ENOENT) | |
2899 | return k; | |
2900 | ||
46824d0e LP |
2901 | /* This is an ugly hack */ |
2902 | if (major(devnr) == 136) { | |
2903 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
2904 | return -ENOMEM; | |
2905 | ||
2906 | *r = b; | |
2907 | if (_devnr) | |
2908 | *_devnr = devnr; | |
2909 | ||
2910 | return 0; | |
2911 | } | |
2912 | ||
fc116c6a LP |
2913 | /* Probably something like the ptys which have no |
2914 | * symlink in /dev/char. Let's return something | |
2915 | * vaguely useful. */ | |
2916 | ||
23406ce5 LP |
2917 | b = strdup(fn + 5); |
2918 | if (!b) | |
fc116c6a LP |
2919 | return -ENOMEM; |
2920 | ||
2921 | *r = b; | |
46824d0e LP |
2922 | if (_devnr) |
2923 | *_devnr = devnr; | |
2924 | ||
fc116c6a LP |
2925 | return 0; |
2926 | } | |
2927 | ||
2928 | if (startswith(s, "/dev/")) | |
2929 | p = s + 5; | |
2930 | else if (startswith(s, "../")) | |
2931 | p = s + 3; | |
2932 | else | |
2933 | p = s; | |
2934 | ||
2935 | b = strdup(p); | |
2936 | free(s); | |
2937 | ||
2938 | if (!b) | |
2939 | return -ENOMEM; | |
2940 | ||
2941 | *r = b; | |
46824d0e LP |
2942 | if (_devnr) |
2943 | *_devnr = devnr; | |
2944 | ||
fc116c6a LP |
2945 | return 0; |
2946 | } | |
2947 | ||
f56d5db9 | 2948 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
2949 | DIR *d; |
2950 | int ret = 0; | |
2951 | ||
2952 | assert(fd >= 0); | |
2953 | ||
2954 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2955 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2956 | |
d4d046e3 LP |
2957 | d = fdopendir(fd); |
2958 | if (!d) { | |
8c6db833 | 2959 | close_nointr_nofail(fd); |
4c633005 LP |
2960 | |
2961 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2962 | } |
2963 | ||
2964 | for (;;) { | |
7d5e9c0f LP |
2965 | struct dirent *de; |
2966 | union dirent_storage buf; | |
7925c22a LP |
2967 | bool is_dir, keep_around; |
2968 | struct stat st; | |
8c6db833 LP |
2969 | int r; |
2970 | ||
7d5e9c0f | 2971 | r = readdir_r(d, &buf.de, &de); |
d4d046e3 LP |
2972 | if (r != 0 && ret == 0) { |
2973 | ret = -r; | |
8c6db833 LP |
2974 | break; |
2975 | } | |
2976 | ||
2977 | if (!de) | |
2978 | break; | |
2979 | ||
2980 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
2981 | continue; | |
2982 | ||
7925c22a LP |
2983 | if (de->d_type == DT_UNKNOWN || |
2984 | honour_sticky || | |
2985 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2986 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2987 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2988 | ret = -errno; |
2989 | continue; | |
2990 | } | |
2991 | ||
2992 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2993 | keep_around = |
2994 | honour_sticky && | |
2995 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2996 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2997 | } else { |
8c6db833 | 2998 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2999 | keep_around = false; |
ad293f5a | 3000 | } |
8c6db833 LP |
3001 | |
3002 | if (is_dir) { | |
3003 | int subdir_fd; | |
8c6db833 | 3004 | |
597f43c7 | 3005 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
3006 | if (root_dev && st.st_dev != root_dev->st_dev) |
3007 | continue; | |
8c6db833 | 3008 | |
7925c22a LP |
3009 | subdir_fd = openat(fd, de->d_name, |
3010 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
3011 | if (subdir_fd < 0) { | |
3012 | if (ret == 0 && errno != ENOENT) | |
3013 | ret = -errno; | |
3014 | continue; | |
3015 | } | |
3016 | ||
b3d28469 | 3017 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
3018 | if (r < 0 && ret == 0) |
3019 | ret = r; | |
3020 | ||
3021 | if (!keep_around) | |
3022 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
3023 | if (ret == 0 && errno != ENOENT) |
3024 | ret = -errno; | |
3025 | } | |
3026 | ||
3027 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
3028 | |
3029 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3030 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3031 | ret = -errno; |
3032 | } | |
3033 | } | |
3034 | } | |
3035 | ||
3036 | closedir(d); | |
3037 | ||
3038 | return ret; | |
3039 | } | |
3040 | ||
943aad8c ZJS |
3041 | static int is_temporary_fs(struct statfs *s) { |
3042 | assert(s); | |
3043 | return s->f_type == TMPFS_MAGIC || | |
3044 | (long)s->f_type == (long)RAMFS_MAGIC; | |
3045 | } | |
3046 | ||
f56d5db9 LP |
3047 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
3048 | struct statfs s; | |
3049 | ||
3050 | assert(fd >= 0); | |
3051 | ||
3052 | if (fstatfs(fd, &s) < 0) { | |
3053 | close_nointr_nofail(fd); | |
3054 | return -errno; | |
3055 | } | |
3056 | ||
3057 | /* We refuse to clean disk file systems with this call. This | |
3058 | * is extra paranoia just to be sure we never ever remove | |
3059 | * non-state data */ | |
943aad8c | 3060 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
3061 | log_error("Attempted to remove disk file system, and we can't allow that."); |
3062 | close_nointr_nofail(fd); | |
3063 | return -EPERM; | |
3064 | } | |
3065 | ||
3066 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
3067 | } | |
3068 | ||
3069 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
3070 | int fd, r; | |
3071 | struct statfs s; | |
8c6db833 LP |
3072 | |
3073 | assert(path); | |
3074 | ||
f56d5db9 LP |
3075 | /* We refuse to clean the root file system with this |
3076 | * call. This is extra paranoia to never cause a really | |
3077 | * seriously broken system. */ | |
3078 | if (path_equal(path, "/")) { | |
3079 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
3080 | return -EPERM; | |
3081 | } | |
461b1822 | 3082 | |
d4d046e3 LP |
3083 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
3084 | if (fd < 0) { | |
8c6db833 LP |
3085 | |
3086 | if (errno != ENOTDIR) | |
3087 | return -errno; | |
3088 | ||
f56d5db9 LP |
3089 | if (!dangerous) { |
3090 | if (statfs(path, &s) < 0) | |
3091 | return -errno; | |
3092 | ||
943aad8c | 3093 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
3094 | log_error("Attempted to remove disk file system, and we can't allow that."); |
3095 | return -EPERM; | |
3096 | } | |
3097 | } | |
3098 | ||
8c6db833 | 3099 | if (delete_root && !only_dirs) |
d4d046e3 | 3100 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
3101 | return -errno; |
3102 | ||
3103 | return 0; | |
3104 | } | |
3105 | ||
f56d5db9 LP |
3106 | if (!dangerous) { |
3107 | if (fstatfs(fd, &s) < 0) { | |
3108 | close_nointr_nofail(fd); | |
3109 | return -errno; | |
3110 | } | |
ad293f5a | 3111 | |
943aad8c | 3112 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
3113 | log_error("Attempted to remove disk file system, and we can't allow that."); |
3114 | close_nointr_nofail(fd); | |
3115 | return -EPERM; | |
3116 | } | |
3117 | } | |
3118 | ||
3119 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
3120 | if (delete_root) { |
3121 | ||
8d53b453 | 3122 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 3123 | return r; |
8c6db833 | 3124 | |
e27796a0 | 3125 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
3126 | if (r == 0) |
3127 | r = -errno; | |
3128 | } | |
ad293f5a | 3129 | } |
8c6db833 LP |
3130 | |
3131 | return r; | |
3132 | } | |
3133 | ||
f56d5db9 LP |
3134 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
3135 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
3136 | } | |
3137 | ||
3138 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
3139 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
3140 | } | |
3141 | ||
8c6db833 LP |
3142 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
3143 | assert(path); | |
3144 | ||
3145 | /* Under the assumption that we are running privileged we | |
3146 | * first change the access mode and only then hand out | |
3147 | * ownership to avoid a window where access is too open. */ | |
3148 | ||
8d53b453 LP |
3149 | if (mode != (mode_t) -1) |
3150 | if (chmod(path, mode) < 0) | |
3151 | return -errno; | |
8c6db833 | 3152 | |
8d53b453 LP |
3153 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
3154 | if (chown(path, uid, gid) < 0) | |
3155 | return -errno; | |
8c6db833 LP |
3156 | |
3157 | return 0; | |
ef2f1067 LP |
3158 | } |
3159 | ||
f4b47811 LP |
3160 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
3161 | assert(fd >= 0); | |
3162 | ||
3163 | /* Under the assumption that we are running privileged we | |
3164 | * first change the access mode and only then hand out | |
3165 | * ownership to avoid a window where access is too open. */ | |
3166 | ||
3167 | if (fchmod(fd, mode) < 0) | |
3168 | return -errno; | |
3169 | ||
3170 | if (fchown(fd, uid, gid) < 0) | |
3171 | return -errno; | |
3172 | ||
3173 | return 0; | |
3174 | } | |
3175 | ||
82c121a4 LP |
3176 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3177 | cpu_set_t *r; | |
3178 | unsigned n = 1024; | |
3179 | ||
3180 | /* Allocates the cpuset in the right size */ | |
3181 | ||
3182 | for (;;) { | |
3183 | if (!(r = CPU_ALLOC(n))) | |
3184 | return NULL; | |
3185 | ||
3186 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3187 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3188 | ||
3189 | if (ncpus) | |
3190 | *ncpus = n; | |
3191 | ||
3192 | return r; | |
3193 | } | |
3194 | ||
3195 | CPU_FREE(r); | |
3196 | ||
3197 | if (errno != EINVAL) | |
3198 | return NULL; | |
3199 | ||
3200 | n *= 2; | |
3201 | } | |
3202 | } | |
3203 | ||
669bec5d | 3204 | int status_vprintf(const char *status, bool ellipse, const char *format, va_list ap) { |
9ab7a8d2 | 3205 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
3206 | _cleanup_free_ char *s = NULL; |
3207 | _cleanup_close_ int fd = -1; | |
81beb750 LP |
3208 | struct iovec iovec[5]; |
3209 | int n = 0; | |
9e58ff9c LP |
3210 | |
3211 | assert(format); | |
3212 | ||
9ab7a8d2 | 3213 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
3214 | * optional and go exclusively to the console. */ |
3215 | ||
3216 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 3217 | return log_oom(); |
9e58ff9c | 3218 | |
67e5cc4f | 3219 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 3220 | if (fd < 0) |
669bec5d | 3221 | return fd; |
9e58ff9c | 3222 | |
67e5cc4f | 3223 | if (ellipse) { |
9ab7a8d2 MS |
3224 | char *e; |
3225 | size_t emax, sl; | |
3226 | int c; | |
3227 | ||
67e5cc4f LP |
3228 | c = fd_columns(fd); |
3229 | if (c <= 0) | |
3230 | c = 80; | |
81beb750 | 3231 | |
669bec5d | 3232 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
3233 | |
3234 | emax = c - sl - 1; | |
3235 | if (emax < 3) | |
3236 | emax = 3; | |
81beb750 | 3237 | |
67e5cc4f LP |
3238 | e = ellipsize(s, emax, 75); |
3239 | if (e) { | |
3240 | free(s); | |
3241 | s = e; | |
3242 | } | |
81beb750 LP |
3243 | } |
3244 | ||
3245 | zero(iovec); | |
81beb750 | 3246 | |
9ab7a8d2 MS |
3247 | if (status) { |
3248 | if (!isempty(status)) { | |
3249 | IOVEC_SET_STRING(iovec[n++], "["); | |
3250 | IOVEC_SET_STRING(iovec[n++], status); | |
3251 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3252 | } else | |
3253 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3254 | } |
3255 | ||
9ab7a8d2 MS |
3256 | IOVEC_SET_STRING(iovec[n++], s); |
3257 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 3258 | |
669bec5d LP |
3259 | if (writev(fd, iovec, n) < 0) |
3260 | return -errno; | |
9e58ff9c | 3261 | |
669bec5d | 3262 | return 0; |
9e58ff9c LP |
3263 | } |
3264 | ||
669bec5d | 3265 | int status_printf(const char *status, bool ellipse, const char *format, ...) { |
c846ff47 | 3266 | va_list ap; |
669bec5d | 3267 | int r; |
c846ff47 LP |
3268 | |
3269 | assert(format); | |
3270 | ||
3271 | va_start(ap, format); | |
669bec5d | 3272 | r = status_vprintf(status, ellipse, format, ap); |
c846ff47 | 3273 | va_end(ap); |
669bec5d LP |
3274 | |
3275 | return r; | |
c846ff47 LP |
3276 | } |
3277 | ||
669bec5d | 3278 | int status_welcome(void) { |
10aa7034 | 3279 | int r; |
669bec5d LP |
3280 | _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL; |
3281 | ||
3282 | r = parse_env_file("/etc/os-release", NEWLINE, | |
3283 | "PRETTY_NAME", &pretty_name, | |
3284 | "ANSI_COLOR", &ansi_color, | |
3285 | NULL); | |
3286 | if (r < 0 && r != -ENOENT) | |
3287 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3288 | ||
3289 | return status_printf(NULL, false, | |
3290 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", | |
3291 | isempty(ansi_color) ? "1" : ansi_color, | |
3292 | isempty(pretty_name) ? "Linux" : pretty_name); | |
c846ff47 LP |
3293 | } |
3294 | ||
fab56fc5 LP |
3295 | char *replace_env(const char *format, char **env) { |
3296 | enum { | |
3297 | WORD, | |
c24eb49e | 3298 | CURLY, |
fab56fc5 LP |
3299 | VARIABLE |
3300 | } state = WORD; | |
3301 | ||
3302 | const char *e, *word = format; | |
3303 | char *r = NULL, *k; | |
3304 | ||
3305 | assert(format); | |
3306 | ||
3307 | for (e = format; *e; e ++) { | |
3308 | ||
3309 | switch (state) { | |
3310 | ||
3311 | case WORD: | |
3312 | if (*e == '$') | |
c24eb49e | 3313 | state = CURLY; |
fab56fc5 LP |
3314 | break; |
3315 | ||
c24eb49e LP |
3316 | case CURLY: |
3317 | if (*e == '{') { | |
fab56fc5 LP |
3318 | if (!(k = strnappend(r, word, e-word-1))) |
3319 | goto fail; | |
3320 | ||
3321 | free(r); | |
3322 | r = k; | |
3323 | ||
3324 | word = e-1; | |
3325 | state = VARIABLE; | |
3326 | ||
3327 | } else if (*e == '$') { | |
3328 | if (!(k = strnappend(r, word, e-word))) | |
3329 | goto fail; | |
3330 | ||
3331 | free(r); | |
3332 | r = k; | |
3333 | ||
3334 | word = e+1; | |
3335 | state = WORD; | |
3336 | } else | |
3337 | state = WORD; | |
3338 | break; | |
3339 | ||
3340 | case VARIABLE: | |
c24eb49e | 3341 | if (*e == '}') { |
b95cf362 | 3342 | const char *t; |
fab56fc5 | 3343 | |
b95cf362 LP |
3344 | if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) |
3345 | t = ""; | |
fab56fc5 | 3346 | |
b95cf362 LP |
3347 | if (!(k = strappend(r, t))) |
3348 | goto fail; | |
fab56fc5 | 3349 | |
b95cf362 LP |
3350 | free(r); |
3351 | r = k; | |
fab56fc5 | 3352 | |
b95cf362 | 3353 | word = e+1; |
fab56fc5 LP |
3354 | state = WORD; |
3355 | } | |
3356 | break; | |
3357 | } | |
3358 | } | |
3359 | ||
3360 | if (!(k = strnappend(r, word, e-word))) | |
3361 | goto fail; | |
3362 | ||
3363 | free(r); | |
3364 | return k; | |
3365 | ||
3366 | fail: | |
3367 | free(r); | |
3368 | return NULL; | |
3369 | } | |
3370 | ||
3371 | char **replace_env_argv(char **argv, char **env) { | |
3372 | char **r, **i; | |
c24eb49e LP |
3373 | unsigned k = 0, l = 0; |
3374 | ||
3375 | l = strv_length(argv); | |
fab56fc5 | 3376 | |
c24eb49e | 3377 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3378 | return NULL; |
3379 | ||
3380 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3381 | |
3382 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3383 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3384 | char *e; | |
3385 | char **w, **m; | |
3386 | unsigned q; | |
c24eb49e | 3387 | |
b95cf362 | 3388 | if ((e = strv_env_get(env, *i+1))) { |
c24eb49e LP |
3389 | |
3390 | if (!(m = strv_split_quoted(e))) { | |
3391 | r[k] = NULL; | |
3392 | strv_free(r); | |
3393 | return NULL; | |
3394 | } | |
b95cf362 LP |
3395 | } else |
3396 | m = NULL; | |
c24eb49e | 3397 | |
b95cf362 LP |
3398 | q = strv_length(m); |
3399 | l = l + q - 1; | |
c24eb49e | 3400 | |
b95cf362 LP |
3401 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3402 | r[k] = NULL; | |
3403 | strv_free(r); | |
3404 | strv_free(m); | |
3405 | return NULL; | |
3406 | } | |
c24eb49e | 3407 | |
b95cf362 LP |
3408 | r = w; |
3409 | if (m) { | |
c24eb49e LP |
3410 | memcpy(r + k, m, q * sizeof(char*)); |
3411 | free(m); | |
c24eb49e | 3412 | } |
b95cf362 LP |
3413 | |
3414 | k += q; | |
3415 | continue; | |
c24eb49e LP |
3416 | } |
3417 | ||
3418 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3419 | if (!(r[k++] = replace_env(*i, env))) { |
3420 | strv_free(r); | |
3421 | return NULL; | |
3422 | } | |
3423 | } | |
3424 | ||
3425 | r[k] = NULL; | |
3426 | return r; | |
3427 | } | |
3428 | ||
81beb750 LP |
3429 | int fd_columns(int fd) { |
3430 | struct winsize ws; | |
3431 | zero(ws); | |
3432 | ||
3433 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3434 | return -errno; | |
3435 | ||
3436 | if (ws.ws_col <= 0) | |
3437 | return -EIO; | |
3438 | ||
3439 | return ws.ws_col; | |
3440 | } | |
3441 | ||
28917d7d | 3442 | unsigned columns(void) { |
fa776d8e | 3443 | const char *e; |
7009eec2 | 3444 | int c; |
fa776d8e | 3445 | |
28917d7d LP |
3446 | if (_likely_(cached_columns > 0)) |
3447 | return cached_columns; | |
11f96fac | 3448 | |
28917d7d LP |
3449 | c = 0; |
3450 | e = getenv("COLUMNS"); | |
3451 | if (e) | |
7009eec2 | 3452 | safe_atoi(e, &c); |
fa776d8e | 3453 | |
28917d7d LP |
3454 | if (c <= 0) |
3455 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3456 | |
28917d7d LP |
3457 | if (c <= 0) |
3458 | c = 80; | |
11f96fac | 3459 | |
28917d7d LP |
3460 | cached_columns = c; |
3461 | return c; | |
11f96fac ZJS |
3462 | } |
3463 | ||
8f2d43a0 LP |
3464 | int fd_lines(int fd) { |
3465 | struct winsize ws; | |
3466 | zero(ws); | |
3467 | ||
3468 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3469 | return -errno; | |
3470 | ||
3471 | if (ws.ws_row <= 0) | |
3472 | return -EIO; | |
3473 | ||
3474 | return ws.ws_row; | |
3475 | } | |
3476 | ||
3477 | unsigned lines(void) { | |
8f2d43a0 | 3478 | const char *e; |
ed757c0c | 3479 | unsigned l; |
8f2d43a0 | 3480 | |
ed757c0c LP |
3481 | if (_likely_(cached_lines > 0)) |
3482 | return cached_lines; | |
8f2d43a0 | 3483 | |
ed757c0c | 3484 | l = 0; |
8f2d43a0 LP |
3485 | e = getenv("LINES"); |
3486 | if (e) | |
ed757c0c | 3487 | safe_atou(e, &l); |
8f2d43a0 | 3488 | |
ed757c0c LP |
3489 | if (l <= 0) |
3490 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3491 | |
ed757c0c LP |
3492 | if (l <= 0) |
3493 | l = 24; | |
8f2d43a0 | 3494 | |
ed757c0c LP |
3495 | cached_lines = l; |
3496 | return cached_lines; | |
3497 | } | |
3498 | ||
3499 | /* intended to be used as a SIGWINCH sighandler */ | |
3500 | void columns_lines_cache_reset(int signum) { | |
3501 | cached_columns = 0; | |
3502 | cached_lines = 0; | |
3503 | } | |
3504 | ||
3505 | bool on_tty(void) { | |
3506 | static int cached_on_tty = -1; | |
3507 | ||
3508 | if (_unlikely_(cached_on_tty < 0)) | |
3509 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3510 | ||
3511 | return cached_on_tty; | |
8f2d43a0 LP |
3512 | } |
3513 | ||
b4f10a5e LP |
3514 | int running_in_chroot(void) { |
3515 | struct stat a, b; | |
3516 | ||
3517 | zero(a); | |
3518 | zero(b); | |
3519 | ||
3520 | /* Only works as root */ | |
3521 | ||
3522 | if (stat("/proc/1/root", &a) < 0) | |
3523 | return -errno; | |
3524 | ||
3525 | if (stat("/", &b) < 0) | |
3526 | return -errno; | |
3527 | ||
3528 | return | |
3529 | a.st_dev != b.st_dev || | |
3530 | a.st_ino != b.st_ino; | |
3531 | } | |
3532 | ||
72f59706 LP |
3533 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3534 | size_t x; | |
8fe914ec LP |
3535 | char *r; |
3536 | ||
3537 | assert(s); | |
3538 | assert(percent <= 100); | |
72f59706 | 3539 | assert(new_length >= 3); |
8fe914ec | 3540 | |
72f59706 LP |
3541 | if (old_length <= 3 || old_length <= new_length) |
3542 | return strndup(s, old_length); | |
8fe914ec | 3543 | |
72f59706 LP |
3544 | r = new0(char, new_length+1); |
3545 | if (!r) | |
8fe914ec LP |
3546 | return r; |
3547 | ||
72f59706 | 3548 | x = (new_length * percent) / 100; |
8fe914ec | 3549 | |
72f59706 LP |
3550 | if (x > new_length - 3) |
3551 | x = new_length - 3; | |
8fe914ec LP |
3552 | |
3553 | memcpy(r, s, x); | |
3554 | r[x] = '.'; | |
3555 | r[x+1] = '.'; | |
3556 | r[x+2] = '.'; | |
3557 | memcpy(r + x + 3, | |
72f59706 LP |
3558 | s + old_length - (new_length - x - 3), |
3559 | new_length - x - 3); | |
8fe914ec LP |
3560 | |
3561 | return r; | |
3562 | } | |
3563 | ||
72f59706 LP |
3564 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3565 | return ellipsize_mem(s, strlen(s), length, percent); | |
3566 | } | |
3567 | ||
f6144808 LP |
3568 | int touch(const char *path) { |
3569 | int fd; | |
3570 | ||
3571 | assert(path); | |
3572 | ||
73836c5c LP |
3573 | /* This just opens the file for writing, ensuring it |
3574 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3575 | * does it. */ | |
3576 | ||
3577 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3578 | if (fd < 0) | |
f6144808 LP |
3579 | return -errno; |
3580 | ||
3581 | close_nointr_nofail(fd); | |
3582 | return 0; | |
3583 | } | |
afea26ad | 3584 | |
97c4a07d | 3585 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3586 | size_t l; |
3587 | assert(s); | |
3588 | ||
73836c5c LP |
3589 | /* This is rather stupid, simply removes the heading and |
3590 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3591 | * escaping or anything. We should make this smarter one |
3592 | * day...*/ | |
73836c5c | 3593 | |
31ed59c5 LP |
3594 | l = strlen(s); |
3595 | if (l < 2) | |
11ce3427 LP |
3596 | return strdup(s); |
3597 | ||
97c4a07d | 3598 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3599 | return strndup(s+1, l-2); |
3600 | ||
3601 | return strdup(s); | |
3602 | } | |
3603 | ||
5f7c426e | 3604 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3605 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3606 | char *eq, *r; | |
5f7c426e | 3607 | |
57f30678 LP |
3608 | eq = strchr(s, '='); |
3609 | if (!eq) { | |
3610 | char *t; | |
5f7c426e | 3611 | |
57f30678 LP |
3612 | r = strdup(s); |
3613 | if (!r) | |
5f7c426e LP |
3614 | return NULL; |
3615 | ||
57f30678 LP |
3616 | t = strstrip(r); |
3617 | if (t == r) | |
3618 | return r; | |
3619 | ||
3620 | memmove(r, t, strlen(t) + 1); | |
3621 | return r; | |
5f7c426e LP |
3622 | } |
3623 | ||
57f30678 LP |
3624 | name = strndup(s, eq - s); |
3625 | if (!name) | |
5f7c426e LP |
3626 | return NULL; |
3627 | ||
57f30678 LP |
3628 | p = strdup(eq + 1); |
3629 | if (!p) | |
5f7c426e | 3630 | return NULL; |
5f7c426e LP |
3631 | |
3632 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3633 | if (!value) |
5f7c426e | 3634 | return NULL; |
5f7c426e | 3635 | |
57f30678 | 3636 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3637 | r = NULL; |
3638 | ||
5f7c426e LP |
3639 | return r; |
3640 | } | |
3641 | ||
8e12a6ae | 3642 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3643 | siginfo_t dummy; |
3644 | ||
2e78aa99 | 3645 | assert(pid >= 1); |
1968a360 LP |
3646 | |
3647 | if (!status) | |
3648 | status = &dummy; | |
2e78aa99 LP |
3649 | |
3650 | for (;;) { | |
8e12a6ae LP |
3651 | zero(*status); |
3652 | ||
3653 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3654 | |
3655 | if (errno == EINTR) | |
3656 | continue; | |
3657 | ||
3658 | return -errno; | |
3659 | } | |
3660 | ||
3661 | return 0; | |
3662 | } | |
3663 | } | |
3664 | ||
97c4a07d LP |
3665 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3666 | int r; | |
3667 | siginfo_t status; | |
3668 | ||
3669 | assert(name); | |
3670 | assert(pid > 1); | |
3671 | ||
d87be9b0 LP |
3672 | r = wait_for_terminate(pid, &status); |
3673 | if (r < 0) { | |
97c4a07d LP |
3674 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3675 | return r; | |
3676 | } | |
3677 | ||
3678 | if (status.si_code == CLD_EXITED) { | |
3679 | if (status.si_status != 0) { | |
3680 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3681 | return status.si_status; |
97c4a07d LP |
3682 | } |
3683 | ||
3684 | log_debug("%s succeeded.", name); | |
3685 | return 0; | |
3686 | ||
3687 | } else if (status.si_code == CLD_KILLED || | |
3688 | status.si_code == CLD_DUMPED) { | |
3689 | ||
3690 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3691 | return -EPROTO; | |
3692 | } | |
3693 | ||
3694 | log_warning("%s failed due to unknown reason.", name); | |
3695 | return -EPROTO; | |
97c4a07d LP |
3696 | } |
3697 | ||
6a39419f | 3698 | _noreturn_ void freeze(void) { |
720ce21d LP |
3699 | |
3700 | /* Make sure nobody waits for us on a socket anymore */ | |
3701 | close_all_fds(NULL, 0); | |
3702 | ||
c29597a1 LP |
3703 | sync(); |
3704 | ||
3c14d26c LP |
3705 | for (;;) |
3706 | pause(); | |
3707 | } | |
3708 | ||
00dc5d76 LP |
3709 | bool null_or_empty(struct stat *st) { |
3710 | assert(st); | |
3711 | ||
3712 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3713 | return true; | |
3714 | ||
c8f26f42 | 3715 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3716 | return true; |
3717 | ||
3718 | return false; | |
3719 | } | |
3720 | ||
83096483 LP |
3721 | int null_or_empty_path(const char *fn) { |
3722 | struct stat st; | |
3723 | ||
3724 | assert(fn); | |
3725 | ||
3726 | if (stat(fn, &st) < 0) | |
3727 | return -errno; | |
3728 | ||
3729 | return null_or_empty(&st); | |
3730 | } | |
3731 | ||
a247755d | 3732 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3733 | int nfd; |
3734 | DIR *d; | |
3735 | ||
73836c5c LP |
3736 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags); |
3737 | if (nfd < 0) | |
c4731d11 LP |
3738 | return NULL; |
3739 | ||
73836c5c LP |
3740 | d = fdopendir(nfd); |
3741 | if (!d) { | |
c4731d11 LP |
3742 | close_nointr_nofail(nfd); |
3743 | return NULL; | |
3744 | } | |
3745 | ||
3746 | return d; | |
3b63d2d3 LP |
3747 | } |
3748 | ||
8a0867d6 LP |
3749 | int signal_from_string_try_harder(const char *s) { |
3750 | int signo; | |
3751 | assert(s); | |
3752 | ||
73836c5c LP |
3753 | signo = signal_from_string(s); |
3754 | if (signo <= 0) | |
8a0867d6 LP |
3755 | if (startswith(s, "SIG")) |
3756 | return signal_from_string(s+3); | |
3757 | ||
3758 | return signo; | |
3759 | } | |
3760 | ||
383182b5 | 3761 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
e23a0ce8 LP |
3762 | char *dn, *t, *u; |
3763 | int r; | |
3764 | ||
3765 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
3766 | * UTF8 chars unescaped */ | |
3767 | ||
383182b5 DR |
3768 | u = unquote(tagvalue, "\"\'"); |
3769 | if (u == NULL) | |
3770 | return NULL; | |
e23a0ce8 | 3771 | |
383182b5 DR |
3772 | t = xescape(u, "/ "); |
3773 | free(u); | |
e23a0ce8 | 3774 | |
383182b5 DR |
3775 | if (t == NULL) |
3776 | return NULL; | |
e23a0ce8 | 3777 | |
383182b5 DR |
3778 | r = asprintf(&dn, "/dev/disk/by-%s/%s", by, t); |
3779 | free(t); | |
e23a0ce8 | 3780 | |
383182b5 DR |
3781 | if (r < 0) |
3782 | return NULL; | |
e23a0ce8 | 3783 | |
383182b5 DR |
3784 | return dn; |
3785 | } | |
e23a0ce8 | 3786 | |
383182b5 | 3787 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3788 | assert(p); |
3789 | ||
383182b5 DR |
3790 | if (startswith(p, "LABEL=")) |
3791 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3792 | |
383182b5 DR |
3793 | if (startswith(p, "UUID=")) |
3794 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3795 | |
84cc2abf DR |
3796 | if (startswith(p, "PARTUUID=")) |
3797 | return tag_to_udev_node(p+9, "partuuid"); | |
3798 | ||
3799 | if (startswith(p, "PARTLABEL=")) | |
3800 | return tag_to_udev_node(p+10, "partlabel"); | |
3801 | ||
e23a0ce8 LP |
3802 | return strdup(p); |
3803 | } | |
3804 | ||
f212ac12 LP |
3805 | bool tty_is_vc(const char *tty) { |
3806 | assert(tty); | |
3807 | ||
3808 | if (startswith(tty, "/dev/")) | |
3809 | tty += 5; | |
3810 | ||
98a28fef LP |
3811 | return vtnr_from_tty(tty) >= 0; |
3812 | } | |
3813 | ||
d1122ad5 LP |
3814 | bool tty_is_console(const char *tty) { |
3815 | assert(tty); | |
3816 | ||
3817 | if (startswith(tty, "/dev/")) | |
3818 | tty += 5; | |
3819 | ||
3820 | return streq(tty, "console"); | |
3821 | } | |
3822 | ||
98a28fef LP |
3823 | int vtnr_from_tty(const char *tty) { |
3824 | int i, r; | |
3825 | ||
3826 | assert(tty); | |
3827 | ||
3828 | if (startswith(tty, "/dev/")) | |
3829 | tty += 5; | |
3830 | ||
3831 | if (!startswith(tty, "tty") ) | |
3832 | return -EINVAL; | |
3833 | ||
3834 | if (tty[3] < '0' || tty[3] > '9') | |
3835 | return -EINVAL; | |
3836 | ||
3837 | r = safe_atoi(tty+3, &i); | |
3838 | if (r < 0) | |
3839 | return r; | |
3840 | ||
3841 | if (i < 0 || i > 63) | |
3842 | return -EINVAL; | |
3843 | ||
3844 | return i; | |
f212ac12 LP |
3845 | } |
3846 | ||
3043935f | 3847 | bool tty_is_vc_resolve(const char *tty) { |
3030ccd7 | 3848 | char *active = NULL; |
3043935f | 3849 | bool b; |
3030ccd7 | 3850 | |
e3aa71c3 LP |
3851 | assert(tty); |
3852 | ||
3853 | if (startswith(tty, "/dev/")) | |
3854 | tty += 5; | |
3855 | ||
3d9a4122 LP |
3856 | /* Resolve where /dev/console is pointing to, if /sys is |
3857 | * actually ours (i.e. not read-only-mounted which is a sign | |
3858 | * for container setups) */ | |
3859 | if (streq(tty, "console") && path_is_read_only_fs("/sys") <= 0) | |
3030ccd7 | 3860 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { |
079a09fb LP |
3861 | /* If multiple log outputs are configured the |
3862 | * last one is what /dev/console points to */ | |
3043935f LP |
3863 | tty = strrchr(active, ' '); |
3864 | if (tty) | |
079a09fb LP |
3865 | tty++; |
3866 | else | |
3867 | tty = active; | |
3030ccd7 LP |
3868 | } |
3869 | ||
3043935f | 3870 | b = tty_is_vc(tty); |
3030ccd7 | 3871 | free(active); |
e3aa71c3 | 3872 | |
3043935f LP |
3873 | return b; |
3874 | } | |
3875 | ||
3876 | const char *default_term_for_tty(const char *tty) { | |
3877 | assert(tty); | |
3878 | ||
acda6a05 | 3879 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3880 | } |
3881 | ||
87d2c1ff | 3882 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3883 | assert(de); |
3884 | ||
3885 | if (ignore_file(de->d_name)) | |
3886 | return false; | |
3887 | ||
3888 | if (de->d_type != DT_REG && | |
3889 | de->d_type != DT_LNK && | |
3890 | de->d_type != DT_UNKNOWN) | |
3891 | return false; | |
3892 | ||
3893 | return true; | |
3894 | } | |
3895 | ||
87d2c1ff LP |
3896 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3897 | assert(de); | |
3898 | ||
a228a22f LP |
3899 | if (de->d_type != DT_REG && |
3900 | de->d_type != DT_LNK && | |
3901 | de->d_type != DT_UNKNOWN) | |
3902 | return false; | |
3903 | ||
3904 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3905 | return false; |
3906 | ||
3907 | return endswith(de->d_name, suffix); | |
3908 | } | |
3909 | ||
83cc030f LP |
3910 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
3911 | DIR *_d = NULL; | |
3912 | struct dirent *de; | |
3913 | Hashmap *pids = NULL; | |
3914 | ||
3915 | assert(directory); | |
3916 | ||
3917 | /* Executes all binaries in a directory in parallel and waits | |
3918 | * until all they all finished. */ | |
3919 | ||
3920 | if (!d) { | |
3921 | if (!(_d = opendir(directory))) { | |
3922 | ||
3923 | if (errno == ENOENT) | |
3924 | return; | |
3925 | ||
3926 | log_error("Failed to enumerate directory %s: %m", directory); | |
3927 | return; | |
3928 | } | |
3929 | ||
3930 | d = _d; | |
3931 | } | |
3932 | ||
3933 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
3934 | log_error("Failed to allocate set."); | |
3935 | goto finish; | |
3936 | } | |
3937 | ||
3938 | while ((de = readdir(d))) { | |
3939 | char *path; | |
3940 | pid_t pid; | |
3941 | int k; | |
3942 | ||
fb19a739 | 3943 | if (!dirent_is_file(de)) |
83cc030f LP |
3944 | continue; |
3945 | ||
3946 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 3947 | log_oom(); |
83cc030f LP |
3948 | continue; |
3949 | } | |
3950 | ||
3951 | if ((pid = fork()) < 0) { | |
3952 | log_error("Failed to fork: %m"); | |
3953 | free(path); | |
3954 | continue; | |
3955 | } | |
3956 | ||
3957 | if (pid == 0) { | |
3958 | char *_argv[2]; | |
3959 | /* Child */ | |
3960 | ||
3961 | if (!argv) { | |
3962 | _argv[0] = path; | |
3963 | _argv[1] = NULL; | |
3964 | argv = _argv; | |
3965 | } else | |
6edd7d0a | 3966 | argv[0] = path; |
83cc030f LP |
3967 | |
3968 | execv(path, argv); | |
3969 | ||
3970 | log_error("Failed to execute %s: %m", path); | |
3971 | _exit(EXIT_FAILURE); | |
3972 | } | |
3973 | ||
3974 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
3975 | ||
3976 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
3977 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
3978 | free(path); | |
3979 | } | |
3980 | } | |
3981 | ||
3982 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 3983 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
83cc030f LP |
3984 | siginfo_t si; |
3985 | char *path; | |
3986 | ||
3987 | zero(si); | |
ec3f9b53 | 3988 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
3989 | |
3990 | if (errno == EINTR) | |
3991 | continue; | |
3992 | ||
3993 | log_error("waitid() failed: %m"); | |
3994 | goto finish; | |
3995 | } | |
3996 | ||
3997 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 3998 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
3999 | if (si.si_code == CLD_EXITED) |
4000 | log_error("%s exited with exit status %i.", path, si.si_status); | |
4001 | else | |
4002 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
4003 | } else | |
4004 | log_debug("%s exited successfully.", path); | |
4005 | ||
4006 | free(path); | |
4007 | } | |
4008 | } | |
4009 | ||
4010 | finish: | |
4011 | if (_d) | |
4012 | closedir(_d); | |
4013 | ||
4014 | if (pids) | |
4015 | hashmap_free_free(pids); | |
4016 | } | |
4017 | ||
430c18ed LP |
4018 | int kill_and_sigcont(pid_t pid, int sig) { |
4019 | int r; | |
4020 | ||
4021 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4022 | ||
4023 | if (r >= 0) | |
4024 | kill(pid, SIGCONT); | |
4025 | ||
4026 | return r; | |
4027 | } | |
4028 | ||
05feefe0 LP |
4029 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4030 | const char *i; | |
4031 | ||
4032 | if (!nulstr) | |
4033 | return false; | |
4034 | ||
4035 | NULSTR_FOREACH(i, nulstr) | |
4036 | if (streq(i, needle)) | |
4037 | return true; | |
4038 | ||
4039 | return false; | |
4040 | } | |
4041 | ||
6faa1114 | 4042 | bool plymouth_running(void) { |
9408a2d2 | 4043 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4044 | } |
4045 | ||
9beb3f4d LP |
4046 | char* strshorten(char *s, size_t l) { |
4047 | assert(s); | |
4048 | ||
4049 | if (l < strlen(s)) | |
4050 | s[l] = 0; | |
4051 | ||
4052 | return s; | |
4053 | } | |
4054 | ||
4055 | static bool hostname_valid_char(char c) { | |
4056 | return | |
4057 | (c >= 'a' && c <= 'z') || | |
4058 | (c >= 'A' && c <= 'Z') || | |
4059 | (c >= '0' && c <= '9') || | |
4060 | c == '-' || | |
4061 | c == '_' || | |
4062 | c == '.'; | |
4063 | } | |
4064 | ||
4065 | bool hostname_is_valid(const char *s) { | |
4066 | const char *p; | |
4067 | ||
4068 | if (isempty(s)) | |
4069 | return false; | |
4070 | ||
4071 | for (p = s; *p; p++) | |
4072 | if (!hostname_valid_char(*p)) | |
4073 | return false; | |
4074 | ||
4075 | if (p-s > HOST_NAME_MAX) | |
4076 | return false; | |
4077 | ||
4078 | return true; | |
4079 | } | |
4080 | ||
4081 | char* hostname_cleanup(char *s) { | |
4082 | char *p, *d; | |
4083 | ||
4084 | for (p = s, d = s; *p; p++) | |
4085 | if ((*p >= 'a' && *p <= 'z') || | |
4086 | (*p >= 'A' && *p <= 'Z') || | |
4087 | (*p >= '0' && *p <= '9') || | |
4088 | *p == '-' || | |
4089 | *p == '_' || | |
4090 | *p == '.') | |
4091 | *(d++) = *p; | |
4092 | ||
4093 | *d = 0; | |
4094 | ||
4095 | strshorten(s, HOST_NAME_MAX); | |
4096 | return s; | |
4097 | } | |
4098 | ||
1325aa42 LP |
4099 | int pipe_eof(int fd) { |
4100 | struct pollfd pollfd; | |
4101 | int r; | |
4102 | ||
4103 | zero(pollfd); | |
4104 | pollfd.fd = fd; | |
4105 | pollfd.events = POLLIN|POLLHUP; | |
4106 | ||
4107 | r = poll(&pollfd, 1, 0); | |
4108 | if (r < 0) | |
4109 | return -errno; | |
4110 | ||
4111 | if (r == 0) | |
4112 | return 0; | |
4113 | ||
4114 | return pollfd.revents & POLLHUP; | |
4115 | } | |
4116 | ||
8f2d43a0 | 4117 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b LP |
4118 | struct pollfd pollfd; |
4119 | int r; | |
4120 | ||
4121 | zero(pollfd); | |
4122 | pollfd.fd = fd; | |
4123 | pollfd.events = event; | |
4124 | ||
8f2d43a0 | 4125 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
4126 | if (r < 0) |
4127 | return -errno; | |
4128 | ||
4129 | if (r == 0) | |
4130 | return 0; | |
4131 | ||
4132 | return pollfd.revents; | |
4133 | } | |
4134 | ||
5a3ab509 LP |
4135 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4136 | FILE *f; | |
4137 | char *t; | |
4138 | const char *fn; | |
4139 | size_t k; | |
4140 | int fd; | |
4141 | ||
4142 | assert(path); | |
4143 | assert(_f); | |
4144 | assert(_temp_path); | |
4145 | ||
4146 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4147 | if (!t) | |
4148 | return -ENOMEM; | |
4149 | ||
9eb977db | 4150 | fn = path_get_file_name(path); |
5a3ab509 LP |
4151 | k = fn-path; |
4152 | memcpy(t, path, k); | |
4153 | t[k] = '.'; | |
4154 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4155 | ||
4156 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4157 | if (fd < 0) { | |
4158 | free(t); | |
4159 | return -errno; | |
4160 | } | |
4161 | ||
4162 | f = fdopen(fd, "we"); | |
4163 | if (!f) { | |
4164 | unlink(t); | |
4165 | free(t); | |
4166 | return -errno; | |
4167 | } | |
4168 | ||
4169 | *_f = f; | |
4170 | *_temp_path = t; | |
4171 | ||
4172 | return 0; | |
4173 | } | |
4174 | ||
6ea832a2 | 4175 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4176 | assert(fd >= 0); |
4177 | ||
6ea832a2 LP |
4178 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4179 | return -errno; | |
4180 | ||
4181 | return 0; | |
4182 | } | |
4183 | ||
4184 | int terminal_vhangup(const char *name) { | |
4185 | int fd, r; | |
4186 | ||
4187 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4188 | if (fd < 0) | |
4189 | return fd; | |
4190 | ||
4191 | r = terminal_vhangup_fd(fd); | |
4192 | close_nointr_nofail(fd); | |
4193 | ||
4194 | return r; | |
4195 | } | |
4196 | ||
4197 | int vt_disallocate(const char *name) { | |
4198 | int fd, r; | |
4199 | unsigned u; | |
6ea832a2 LP |
4200 | |
4201 | /* Deallocate the VT if possible. If not possible | |
4202 | * (i.e. because it is the active one), at least clear it | |
4203 | * entirely (including the scrollback buffer) */ | |
4204 | ||
b83bc4e9 LP |
4205 | if (!startswith(name, "/dev/")) |
4206 | return -EINVAL; | |
4207 | ||
4208 | if (!tty_is_vc(name)) { | |
4209 | /* So this is not a VT. I guess we cannot deallocate | |
4210 | * it then. But let's at least clear the screen */ | |
4211 | ||
4212 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4213 | if (fd < 0) | |
4214 | return fd; | |
4215 | ||
8585357a LP |
4216 | loop_write(fd, |
4217 | "\033[r" /* clear scrolling region */ | |
4218 | "\033[H" /* move home */ | |
4219 | "\033[2J", /* clear screen */ | |
4220 | 10, false); | |
b83bc4e9 LP |
4221 | close_nointr_nofail(fd); |
4222 | ||
4223 | return 0; | |
4224 | } | |
6ea832a2 LP |
4225 | |
4226 | if (!startswith(name, "/dev/tty")) | |
4227 | return -EINVAL; | |
4228 | ||
4229 | r = safe_atou(name+8, &u); | |
4230 | if (r < 0) | |
4231 | return r; | |
4232 | ||
4233 | if (u <= 0) | |
b83bc4e9 | 4234 | return -EINVAL; |
6ea832a2 | 4235 | |
b83bc4e9 | 4236 | /* Try to deallocate */ |
6ea832a2 LP |
4237 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4238 | if (fd < 0) | |
4239 | return fd; | |
4240 | ||
4241 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4242 | close_nointr_nofail(fd); |
6ea832a2 | 4243 | |
b83bc4e9 LP |
4244 | if (r >= 0) |
4245 | return 0; | |
6ea832a2 | 4246 | |
b83bc4e9 | 4247 | if (errno != EBUSY) |
6ea832a2 | 4248 | return -errno; |
6ea832a2 | 4249 | |
b83bc4e9 LP |
4250 | /* Couldn't deallocate, so let's clear it fully with |
4251 | * scrollback */ | |
4252 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4253 | if (fd < 0) |
b83bc4e9 | 4254 | return fd; |
6ea832a2 | 4255 | |
8585357a LP |
4256 | loop_write(fd, |
4257 | "\033[r" /* clear scrolling region */ | |
4258 | "\033[H" /* move home */ | |
4259 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4260 | 10, false); | |
b83bc4e9 | 4261 | close_nointr_nofail(fd); |
6ea832a2 | 4262 | |
b83bc4e9 | 4263 | return 0; |
6ea832a2 LP |
4264 | } |
4265 | ||
34ca941c LP |
4266 | int copy_file(const char *from, const char *to) { |
4267 | int r, fdf, fdt; | |
4268 | ||
4269 | assert(from); | |
4270 | assert(to); | |
4271 | ||
4272 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4273 | if (fdf < 0) | |
4274 | return -errno; | |
4275 | ||
4276 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
4277 | if (fdt < 0) { | |
4278 | close_nointr_nofail(fdf); | |
4279 | return -errno; | |
4280 | } | |
4281 | ||
4282 | for (;;) { | |
4283 | char buf[PIPE_BUF]; | |
4284 | ssize_t n, k; | |
4285 | ||
4286 | n = read(fdf, buf, sizeof(buf)); | |
4287 | if (n < 0) { | |
4288 | r = -errno; | |
4289 | ||
4290 | close_nointr_nofail(fdf); | |
4291 | close_nointr(fdt); | |
4292 | unlink(to); | |
4293 | ||
4294 | return r; | |
4295 | } | |
4296 | ||
4297 | if (n == 0) | |
4298 | break; | |
4299 | ||
4300 | errno = 0; | |
4301 | k = loop_write(fdt, buf, n, false); | |
4302 | if (n != k) { | |
4303 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4304 | ||
4305 | close_nointr_nofail(fdf); | |
4306 | close_nointr(fdt); | |
4307 | ||
4308 | unlink(to); | |
4309 | return r; | |
4310 | } | |
4311 | } | |
4312 | ||
4313 | close_nointr_nofail(fdf); | |
4314 | r = close_nointr(fdt); | |
4315 | ||
4316 | if (r < 0) { | |
4317 | unlink(to); | |
4318 | return r; | |
4319 | } | |
4320 | ||
4321 | return 0; | |
4322 | } | |
4323 | ||
424a19f8 LP |
4324 | int symlink_atomic(const char *from, const char *to) { |
4325 | char *x; | |
4326 | _cleanup_free_ char *t; | |
34ca941c LP |
4327 | const char *fn; |
4328 | size_t k; | |
4329 | unsigned long long ull; | |
4330 | unsigned i; | |
4331 | int r; | |
4332 | ||
4333 | assert(from); | |
4334 | assert(to); | |
4335 | ||
4336 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4337 | if (!t) | |
4338 | return -ENOMEM; | |
4339 | ||
9eb977db | 4340 | fn = path_get_file_name(to); |
34ca941c LP |
4341 | k = fn-to; |
4342 | memcpy(t, to, k); | |
4343 | t[k] = '.'; | |
4344 | x = stpcpy(t+k+1, fn); | |
4345 | ||
4346 | ull = random_ull(); | |
4347 | for (i = 0; i < 16; i++) { | |
4348 | *(x++) = hexchar(ull & 0xF); | |
4349 | ull >>= 4; | |
4350 | } | |
4351 | ||
4352 | *x = 0; | |
4353 | ||
424a19f8 LP |
4354 | if (symlink(from, t) < 0) |
4355 | return -errno; | |
34ca941c LP |
4356 | |
4357 | if (rename(t, to) < 0) { | |
4358 | r = -errno; | |
4359 | unlink(t); | |
34ca941c LP |
4360 | return r; |
4361 | } | |
4362 | ||
424a19f8 | 4363 | return 0; |
34ca941c LP |
4364 | } |
4365 | ||
4d6d6518 LP |
4366 | bool display_is_local(const char *display) { |
4367 | assert(display); | |
4368 | ||
4369 | return | |
4370 | display[0] == ':' && | |
4371 | display[1] >= '0' && | |
4372 | display[1] <= '9'; | |
4373 | } | |
4374 | ||
4375 | int socket_from_display(const char *display, char **path) { | |
4376 | size_t k; | |
4377 | char *f, *c; | |
4378 | ||
4379 | assert(display); | |
4380 | assert(path); | |
4381 | ||
4382 | if (!display_is_local(display)) | |
4383 | return -EINVAL; | |
4384 | ||
4385 | k = strspn(display+1, "0123456789"); | |
4386 | ||
4387 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4388 | if (!f) | |
4389 | return -ENOMEM; | |
4390 | ||
4391 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4392 | memcpy(c, display+1, k); | |
4393 | c[k] = 0; | |
4394 | ||
4395 | *path = f; | |
4396 | ||
4397 | return 0; | |
4398 | } | |
4399 | ||
d05c5031 LP |
4400 | int get_user_creds( |
4401 | const char **username, | |
4402 | uid_t *uid, gid_t *gid, | |
4403 | const char **home, | |
4404 | const char **shell) { | |
4405 | ||
1cccf435 | 4406 | struct passwd *p; |
ddd88763 | 4407 | uid_t u; |
1cccf435 MV |
4408 | |
4409 | assert(username); | |
4410 | assert(*username); | |
1cccf435 MV |
4411 | |
4412 | /* We enforce some special rules for uid=0: in order to avoid | |
4413 | * NSS lookups for root we hardcode its data. */ | |
4414 | ||
4415 | if (streq(*username, "root") || streq(*username, "0")) { | |
4416 | *username = "root"; | |
4b67834e LP |
4417 | |
4418 | if (uid) | |
4419 | *uid = 0; | |
4420 | ||
4421 | if (gid) | |
4422 | *gid = 0; | |
4423 | ||
4424 | if (home) | |
4425 | *home = "/root"; | |
d05c5031 LP |
4426 | |
4427 | if (shell) | |
4428 | *shell = "/bin/sh"; | |
4429 | ||
1cccf435 MV |
4430 | return 0; |
4431 | } | |
4432 | ||
ddd88763 | 4433 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4434 | errno = 0; |
ddd88763 | 4435 | p = getpwuid(u); |
1cccf435 MV |
4436 | |
4437 | /* If there are multiple users with the same id, make | |
4438 | * sure to leave $USER to the configured value instead | |
4439 | * of the first occurrence in the database. However if | |
4440 | * the uid was configured by a numeric uid, then let's | |
4441 | * pick the real username from /etc/passwd. */ | |
4442 | if (p) | |
4443 | *username = p->pw_name; | |
4444 | } else { | |
4445 | errno = 0; | |
4446 | p = getpwnam(*username); | |
4447 | } | |
4448 | ||
4449 | if (!p) | |
4450 | return errno != 0 ? -errno : -ESRCH; | |
4451 | ||
4b67834e LP |
4452 | if (uid) |
4453 | *uid = p->pw_uid; | |
4454 | ||
4455 | if (gid) | |
4456 | *gid = p->pw_gid; | |
4457 | ||
4458 | if (home) | |
4459 | *home = p->pw_dir; | |
4460 | ||
d05c5031 LP |
4461 | if (shell) |
4462 | *shell = p->pw_shell; | |
4463 | ||
4b67834e LP |
4464 | return 0; |
4465 | } | |
4466 | ||
59164be4 LP |
4467 | char* uid_to_name(uid_t uid) { |
4468 | struct passwd *p; | |
4469 | char *r; | |
4470 | ||
4471 | if (uid == 0) | |
4472 | return strdup("root"); | |
4473 | ||
4474 | p = getpwuid(uid); | |
4475 | if (p) | |
4476 | return strdup(p->pw_name); | |
4477 | ||
4478 | if (asprintf(&r, "%lu", (unsigned long) uid) < 0) | |
4479 | return NULL; | |
4480 | ||
4481 | return r; | |
4482 | } | |
4483 | ||
4b67834e LP |
4484 | int get_group_creds(const char **groupname, gid_t *gid) { |
4485 | struct group *g; | |
4486 | gid_t id; | |
4487 | ||
4488 | assert(groupname); | |
4489 | ||
4490 | /* We enforce some special rules for gid=0: in order to avoid | |
4491 | * NSS lookups for root we hardcode its data. */ | |
4492 | ||
4493 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4494 | *groupname = "root"; | |
4495 | ||
4496 | if (gid) | |
4497 | *gid = 0; | |
4498 | ||
4499 | return 0; | |
4500 | } | |
4501 | ||
4502 | if (parse_gid(*groupname, &id) >= 0) { | |
4503 | errno = 0; | |
4504 | g = getgrgid(id); | |
4505 | ||
4506 | if (g) | |
4507 | *groupname = g->gr_name; | |
4508 | } else { | |
4509 | errno = 0; | |
4510 | g = getgrnam(*groupname); | |
4511 | } | |
4512 | ||
4513 | if (!g) | |
4514 | return errno != 0 ? -errno : -ESRCH; | |
4515 | ||
4516 | if (gid) | |
4517 | *gid = g->gr_gid; | |
4518 | ||
1cccf435 MV |
4519 | return 0; |
4520 | } | |
4521 | ||
43673799 LP |
4522 | int in_group(const char *name) { |
4523 | gid_t gid, *gids; | |
4524 | int ngroups_max, r, i; | |
4525 | ||
4526 | r = get_group_creds(&name, &gid); | |
4527 | if (r < 0) | |
4528 | return r; | |
4529 | ||
4530 | if (getgid() == gid) | |
4531 | return 1; | |
4532 | ||
4533 | if (getegid() == gid) | |
4534 | return 1; | |
4535 | ||
4536 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4537 | assert(ngroups_max > 0); | |
4538 | ||
4539 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4540 | ||
4541 | r = getgroups(ngroups_max, gids); | |
4542 | if (r < 0) | |
4543 | return -errno; | |
4544 | ||
4545 | for (i = 0; i < r; i++) | |
4546 | if (gids[i] == gid) | |
4547 | return 1; | |
4548 | ||
4549 | return 0; | |
4550 | } | |
4551 | ||
8092a428 LP |
4552 | int glob_exists(const char *path) { |
4553 | glob_t g; | |
4554 | int r, k; | |
4555 | ||
4556 | assert(path); | |
4557 | ||
4558 | zero(g); | |
4559 | errno = 0; | |
4560 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4561 | ||
4562 | if (k == GLOB_NOMATCH) | |
4563 | r = 0; | |
4564 | else if (k == GLOB_NOSPACE) | |
4565 | r = -ENOMEM; | |
4566 | else if (k == 0) | |
4567 | r = !strv_isempty(g.gl_pathv); | |
4568 | else | |
4569 | r = errno ? -errno : -EIO; | |
4570 | ||
4571 | globfree(&g); | |
4572 | ||
4573 | return r; | |
4574 | } | |
4575 | ||
83096483 LP |
4576 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4577 | struct stat st; | |
4578 | ||
4579 | assert(d); | |
4580 | assert(de); | |
4581 | ||
4582 | if (de->d_type != DT_UNKNOWN) | |
4583 | return 0; | |
4584 | ||
4585 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4586 | return -errno; | |
4587 | ||
4588 | de->d_type = | |
4589 | S_ISREG(st.st_mode) ? DT_REG : | |
4590 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4591 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4592 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4593 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4594 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4595 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4596 | DT_UNKNOWN; | |
4597 | ||
4598 | return 0; | |
4599 | } | |
4600 | ||
4601 | int in_search_path(const char *path, char **search) { | |
4602 | char **i, *parent; | |
4603 | int r; | |
4604 | ||
9eb977db | 4605 | r = path_get_parent(path, &parent); |
83096483 LP |
4606 | if (r < 0) |
4607 | return r; | |
4608 | ||
4609 | r = 0; | |
4610 | ||
4611 | STRV_FOREACH(i, search) { | |
4612 | if (path_equal(parent, *i)) { | |
4613 | r = 1; | |
4614 | break; | |
4615 | } | |
4616 | } | |
4617 | ||
4618 | free(parent); | |
4619 | ||
4620 | return r; | |
4621 | } | |
4622 | ||
034a2a52 LP |
4623 | int get_files_in_directory(const char *path, char ***list) { |
4624 | DIR *d; | |
4625 | int r = 0; | |
4626 | unsigned n = 0; | |
4627 | char **l = NULL; | |
4628 | ||
4629 | assert(path); | |
d60ef526 LP |
4630 | |
4631 | /* Returns all files in a directory in *list, and the number | |
4632 | * of files as return value. If list is NULL returns only the | |
4633 | * number */ | |
034a2a52 LP |
4634 | |
4635 | d = opendir(path); | |
8ea913b2 LP |
4636 | if (!d) |
4637 | return -errno; | |
4638 | ||
034a2a52 | 4639 | for (;;) { |
7d5e9c0f LP |
4640 | struct dirent *de; |
4641 | union dirent_storage buf; | |
034a2a52 LP |
4642 | int k; |
4643 | ||
7d5e9c0f | 4644 | k = readdir_r(d, &buf.de, &de); |
034a2a52 LP |
4645 | if (k != 0) { |
4646 | r = -k; | |
4647 | goto finish; | |
4648 | } | |
4649 | ||
4650 | if (!de) | |
4651 | break; | |
4652 | ||
4653 | dirent_ensure_type(d, de); | |
4654 | ||
4655 | if (!dirent_is_file(de)) | |
4656 | continue; | |
4657 | ||
d60ef526 LP |
4658 | if (list) { |
4659 | if ((unsigned) r >= n) { | |
4660 | char **t; | |
034a2a52 | 4661 | |
d60ef526 LP |
4662 | n = MAX(16, 2*r); |
4663 | t = realloc(l, sizeof(char*) * n); | |
4664 | if (!t) { | |
4665 | r = -ENOMEM; | |
4666 | goto finish; | |
4667 | } | |
034a2a52 | 4668 | |
d60ef526 LP |
4669 | l = t; |
4670 | } | |
034a2a52 | 4671 | |
d60ef526 | 4672 | assert((unsigned) r < n); |
034a2a52 | 4673 | |
d60ef526 LP |
4674 | l[r] = strdup(de->d_name); |
4675 | if (!l[r]) { | |
4676 | r = -ENOMEM; | |
4677 | goto finish; | |
4678 | } | |
034a2a52 | 4679 | |
d60ef526 LP |
4680 | l[++r] = NULL; |
4681 | } else | |
4682 | r++; | |
034a2a52 LP |
4683 | } |
4684 | ||
4685 | finish: | |
4686 | if (d) | |
4687 | closedir(d); | |
4688 | ||
d60ef526 LP |
4689 | if (r >= 0) { |
4690 | if (list) | |
4691 | *list = l; | |
4692 | } else | |
034a2a52 LP |
4693 | strv_free(l); |
4694 | ||
4695 | return r; | |
4696 | } | |
4697 | ||
b7def684 | 4698 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4699 | va_list ap; |
4700 | size_t l; | |
4701 | char *r, *p; | |
4702 | ||
4703 | va_start(ap, x); | |
4704 | ||
4705 | if (x) { | |
4706 | l = strlen(x); | |
4707 | ||
4708 | for (;;) { | |
4709 | const char *t; | |
040f18ea | 4710 | size_t n; |
911a4828 LP |
4711 | |
4712 | t = va_arg(ap, const char *); | |
4713 | if (!t) | |
4714 | break; | |
4715 | ||
040f18ea | 4716 | n = strlen(t); |
e98055de LN |
4717 | if (n > ((size_t) -1) - l) { |
4718 | va_end(ap); | |
040f18ea | 4719 | return NULL; |
e98055de | 4720 | } |
040f18ea LP |
4721 | |
4722 | l += n; | |
911a4828 LP |
4723 | } |
4724 | } else | |
4725 | l = 0; | |
4726 | ||
4727 | va_end(ap); | |
4728 | ||
4729 | r = new(char, l+1); | |
4730 | if (!r) | |
4731 | return NULL; | |
4732 | ||
4733 | if (x) { | |
4734 | p = stpcpy(r, x); | |
4735 | ||
4736 | va_start(ap, x); | |
4737 | ||
4738 | for (;;) { | |
4739 | const char *t; | |
4740 | ||
4741 | t = va_arg(ap, const char *); | |
4742 | if (!t) | |
4743 | break; | |
4744 | ||
4745 | p = stpcpy(p, t); | |
4746 | } | |
8ea913b2 LP |
4747 | |
4748 | va_end(ap); | |
911a4828 LP |
4749 | } else |
4750 | r[0] = 0; | |
4751 | ||
4752 | return r; | |
4753 | } | |
4754 | ||
b636465b LP |
4755 | bool is_main_thread(void) { |
4756 | static __thread int cached = 0; | |
4757 | ||
4758 | if (_unlikely_(cached == 0)) | |
4759 | cached = getpid() == gettid() ? 1 : -1; | |
4760 | ||
4761 | return cached > 0; | |
4762 | } | |
4763 | ||
94959f0f LP |
4764 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4765 | char *p, *s; | |
4766 | int r; | |
4767 | unsigned n, m; | |
4768 | ||
4769 | assert(ret); | |
4770 | ||
4771 | /* If it has a queue this is good enough for us */ | |
4772 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4773 | return -ENOMEM; | |
4774 | ||
4775 | r = access(p, F_OK); | |
4776 | free(p); | |
4777 | ||
4778 | if (r >= 0) { | |
4779 | *ret = d; | |
4780 | return 0; | |
4781 | } | |
4782 | ||
4783 | /* If it is a partition find the originating device */ | |
4784 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4785 | return -ENOMEM; | |
4786 | ||
4787 | r = access(p, F_OK); | |
4788 | free(p); | |
4789 | ||
4790 | if (r < 0) | |
4791 | return -ENOENT; | |
4792 | ||
4793 | /* Get parent dev_t */ | |
4794 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4795 | return -ENOMEM; | |
4796 | ||
4797 | r = read_one_line_file(p, &s); | |
4798 | free(p); | |
4799 | ||
4800 | if (r < 0) | |
4801 | return r; | |
4802 | ||
4803 | r = sscanf(s, "%u:%u", &m, &n); | |
4804 | free(s); | |
4805 | ||
4806 | if (r != 2) | |
4807 | return -EINVAL; | |
4808 | ||
4809 | /* Only return this if it is really good enough for us. */ | |
4810 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4811 | return -ENOMEM; | |
4812 | ||
4813 | r = access(p, F_OK); | |
4814 | free(p); | |
4815 | ||
4816 | if (r >= 0) { | |
4817 | *ret = makedev(m, n); | |
4818 | return 0; | |
4819 | } | |
4820 | ||
4821 | return -ENOENT; | |
4822 | } | |
4823 | ||
8d53b453 | 4824 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4825 | struct stat st; |
4826 | ||
4827 | assert(p); | |
4828 | ||
4829 | if (lstat(p, &st) < 0) | |
4830 | return -errno; | |
4831 | ||
4832 | return | |
8d53b453 | 4833 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4834 | (st.st_mode & S_ISVTX); |
4835 | } | |
94959f0f | 4836 | |
f41607a6 LP |
4837 | static const char *const ioprio_class_table[] = { |
4838 | [IOPRIO_CLASS_NONE] = "none", | |
4839 | [IOPRIO_CLASS_RT] = "realtime", | |
4840 | [IOPRIO_CLASS_BE] = "best-effort", | |
4841 | [IOPRIO_CLASS_IDLE] = "idle" | |
4842 | }; | |
4843 | ||
f8b69d1d | 4844 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4845 | |
4846 | static const char *const sigchld_code_table[] = { | |
4847 | [CLD_EXITED] = "exited", | |
4848 | [CLD_KILLED] = "killed", | |
4849 | [CLD_DUMPED] = "dumped", | |
4850 | [CLD_TRAPPED] = "trapped", | |
4851 | [CLD_STOPPED] = "stopped", | |
4852 | [CLD_CONTINUED] = "continued", | |
4853 | }; | |
4854 | ||
4855 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4856 | ||
4857 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4858 | [LOG_FAC(LOG_KERN)] = "kern", | |
4859 | [LOG_FAC(LOG_USER)] = "user", | |
4860 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4861 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4862 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4863 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4864 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4865 | [LOG_FAC(LOG_NEWS)] = "news", | |
4866 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4867 | [LOG_FAC(LOG_CRON)] = "cron", | |
4868 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4869 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4870 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4871 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4872 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4873 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4874 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4875 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4876 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4877 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4878 | }; | |
4879 | ||
f8b69d1d | 4880 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4881 | |
4882 | static const char *const log_level_table[] = { | |
4883 | [LOG_EMERG] = "emerg", | |
4884 | [LOG_ALERT] = "alert", | |
4885 | [LOG_CRIT] = "crit", | |
4886 | [LOG_ERR] = "err", | |
4887 | [LOG_WARNING] = "warning", | |
4888 | [LOG_NOTICE] = "notice", | |
4889 | [LOG_INFO] = "info", | |
4890 | [LOG_DEBUG] = "debug" | |
4891 | }; | |
4892 | ||
f8b69d1d | 4893 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4894 | |
4895 | static const char* const sched_policy_table[] = { | |
4896 | [SCHED_OTHER] = "other", | |
4897 | [SCHED_BATCH] = "batch", | |
4898 | [SCHED_IDLE] = "idle", | |
4899 | [SCHED_FIFO] = "fifo", | |
4900 | [SCHED_RR] = "rr" | |
4901 | }; | |
4902 | ||
f8b69d1d | 4903 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 LP |
4904 | |
4905 | static const char* const rlimit_table[] = { | |
4906 | [RLIMIT_CPU] = "LimitCPU", | |
4907 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4908 | [RLIMIT_DATA] = "LimitDATA", | |
4909 | [RLIMIT_STACK] = "LimitSTACK", | |
4910 | [RLIMIT_CORE] = "LimitCORE", | |
4911 | [RLIMIT_RSS] = "LimitRSS", | |
4912 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4913 | [RLIMIT_AS] = "LimitAS", | |
4914 | [RLIMIT_NPROC] = "LimitNPROC", | |
4915 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4916 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4917 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4918 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4919 | [RLIMIT_NICE] = "LimitNICE", | |
4920 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4921 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4922 | }; | |
4923 | ||
4924 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4925 | ||
4926 | static const char* const ip_tos_table[] = { | |
4927 | [IPTOS_LOWDELAY] = "low-delay", | |
4928 | [IPTOS_THROUGHPUT] = "throughput", | |
4929 | [IPTOS_RELIABILITY] = "reliability", | |
4930 | [IPTOS_LOWCOST] = "low-cost", | |
4931 | }; | |
4932 | ||
f8b69d1d | 4933 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4934 | |
4e240ab0 | 4935 | static const char *const __signal_table[] = { |
f41607a6 LP |
4936 | [SIGHUP] = "HUP", |
4937 | [SIGINT] = "INT", | |
4938 | [SIGQUIT] = "QUIT", | |
4939 | [SIGILL] = "ILL", | |
4940 | [SIGTRAP] = "TRAP", | |
4941 | [SIGABRT] = "ABRT", | |
4942 | [SIGBUS] = "BUS", | |
4943 | [SIGFPE] = "FPE", | |
4944 | [SIGKILL] = "KILL", | |
4945 | [SIGUSR1] = "USR1", | |
4946 | [SIGSEGV] = "SEGV", | |
4947 | [SIGUSR2] = "USR2", | |
4948 | [SIGPIPE] = "PIPE", | |
4949 | [SIGALRM] = "ALRM", | |
4950 | [SIGTERM] = "TERM", | |
4951 | #ifdef SIGSTKFLT | |
4952 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4953 | #endif | |
4954 | [SIGCHLD] = "CHLD", | |
4955 | [SIGCONT] = "CONT", | |
4956 | [SIGSTOP] = "STOP", | |
4957 | [SIGTSTP] = "TSTP", | |
4958 | [SIGTTIN] = "TTIN", | |
4959 | [SIGTTOU] = "TTOU", | |
4960 | [SIGURG] = "URG", | |
4961 | [SIGXCPU] = "XCPU", | |
4962 | [SIGXFSZ] = "XFSZ", | |
4963 | [SIGVTALRM] = "VTALRM", | |
4964 | [SIGPROF] = "PROF", | |
4965 | [SIGWINCH] = "WINCH", | |
4966 | [SIGIO] = "IO", | |
4967 | [SIGPWR] = "PWR", | |
4968 | [SIGSYS] = "SYS" | |
4969 | }; | |
4970 | ||
4e240ab0 MS |
4971 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4972 | ||
4973 | const char *signal_to_string(int signo) { | |
4974 | static __thread char buf[12]; | |
4975 | const char *name; | |
4976 | ||
4977 | name = __signal_to_string(signo); | |
4978 | if (name) | |
4979 | return name; | |
4980 | ||
4981 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
4982 | snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN); | |
4983 | else | |
4984 | snprintf(buf, sizeof(buf) - 1, "%d", signo); | |
4985 | char_array_0(buf); | |
4986 | return buf; | |
4987 | } | |
4988 | ||
4989 | int signal_from_string(const char *s) { | |
4990 | int signo; | |
4991 | int offset = 0; | |
4992 | unsigned u; | |
4993 | ||
040f18ea | 4994 | signo = __signal_from_string(s); |
4e240ab0 MS |
4995 | if (signo > 0) |
4996 | return signo; | |
4997 | ||
4998 | if (startswith(s, "RTMIN+")) { | |
4999 | s += 6; | |
5000 | offset = SIGRTMIN; | |
5001 | } | |
5002 | if (safe_atou(s, &u) >= 0) { | |
5003 | signo = (int) u + offset; | |
5004 | if (signo > 0 && signo < _NSIG) | |
5005 | return signo; | |
5006 | } | |
5007 | return -1; | |
5008 | } | |
65457142 FC |
5009 | |
5010 | bool kexec_loaded(void) { | |
5011 | bool loaded = false; | |
5012 | char *s; | |
5013 | ||
5014 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
5015 | if (s[0] == '1') | |
5016 | loaded = true; | |
5017 | free(s); | |
5018 | } | |
5019 | return loaded; | |
5020 | } | |
fb9de93d LP |
5021 | |
5022 | int strdup_or_null(const char *a, char **b) { | |
5023 | char *c; | |
5024 | ||
5025 | assert(b); | |
5026 | ||
5027 | if (!a) { | |
5028 | *b = NULL; | |
5029 | return 0; | |
5030 | } | |
5031 | ||
5032 | c = strdup(a); | |
5033 | if (!c) | |
5034 | return -ENOMEM; | |
5035 | ||
5036 | *b = c; | |
5037 | return 0; | |
5038 | } | |
64685e0c | 5039 | |
87d2c1ff LP |
5040 | int prot_from_flags(int flags) { |
5041 | ||
5042 | switch (flags & O_ACCMODE) { | |
5043 | ||
5044 | case O_RDONLY: | |
5045 | return PROT_READ; | |
5046 | ||
5047 | case O_WRONLY: | |
5048 | return PROT_WRITE; | |
5049 | ||
5050 | case O_RDWR: | |
5051 | return PROT_READ|PROT_WRITE; | |
5052 | ||
5053 | default: | |
5054 | return -EINVAL; | |
5055 | } | |
7c99e0c1 | 5056 | } |
689b9a22 | 5057 | |
babfc091 | 5058 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 5059 | unsigned i; |
babfc091 LP |
5060 | |
5061 | static const struct { | |
5062 | const char *suffix; | |
5063 | off_t factor; | |
5064 | } table[] = { | |
32895bb3 LP |
5065 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
5066 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
5067 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
5068 | { "G", 1024ULL*1024ULL*1024ULL }, | |
5069 | { "M", 1024ULL*1024ULL }, | |
5070 | { "K", 1024ULL }, | |
5071 | }; | |
5072 | ||
5073 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
5074 | ||
5075 | if (t >= table[i].factor) { | |
5076 | snprintf(buf, l, | |
5077 | "%llu.%llu%s", | |
5078 | (unsigned long long) (t / table[i].factor), | |
5079 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
5080 | table[i].suffix); | |
5081 | ||
5082 | goto finish; | |
5083 | } | |
5084 | } | |
5085 | ||
5086 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
5087 | ||
5088 | finish: | |
5089 | buf[l-1] = 0; | |
5090 | return buf; | |
5091 | ||
5092 | } | |
55d7bfc1 LP |
5093 | |
5094 | void* memdup(const void *p, size_t l) { | |
5095 | void *r; | |
5096 | ||
5097 | assert(p); | |
5098 | ||
5099 | r = malloc(l); | |
5100 | if (!r) | |
5101 | return NULL; | |
5102 | ||
5103 | memcpy(r, p, l); | |
5104 | return r; | |
5105 | } | |
bb99a35a LP |
5106 | |
5107 | int fd_inc_sndbuf(int fd, size_t n) { | |
5108 | int r, value; | |
5109 | socklen_t l = sizeof(value); | |
5110 | ||
5111 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
5112 | if (r >= 0 && | |
5113 | l == sizeof(value) && | |
5114 | (size_t) value >= n*2) | |
5115 | return 0; | |
5116 | ||
5117 | value = (int) n; | |
5118 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
5119 | if (r < 0) | |
5120 | return -errno; | |
5121 | ||
5122 | return 1; | |
5123 | } | |
5124 | ||
5125 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5126 | int r, value; | |
5127 | socklen_t l = sizeof(value); | |
5128 | ||
5129 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
5130 | if (r >= 0 && | |
5131 | l == sizeof(value) && | |
5132 | (size_t) value >= n*2) | |
5133 | return 0; | |
5134 | ||
5135 | value = (int) n; | |
5136 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
5137 | if (r < 0) | |
5138 | return -errno; | |
5139 | ||
5140 | return 1; | |
5141 | } | |
6bb92a16 | 5142 | |
9bdc770c | 5143 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
5144 | pid_t parent_pid, agent_pid; |
5145 | int fd; | |
5146 | bool stdout_is_tty, stderr_is_tty; | |
5147 | unsigned n, i; | |
5148 | va_list ap; | |
5149 | char **l; | |
5150 | ||
5151 | assert(pid); | |
5152 | assert(path); | |
5153 | ||
5154 | parent_pid = getpid(); | |
5155 | ||
5156 | /* Spawns a temporary TTY agent, making sure it goes away when | |
5157 | * we go away */ | |
5158 | ||
5159 | agent_pid = fork(); | |
5160 | if (agent_pid < 0) | |
5161 | return -errno; | |
5162 | ||
5163 | if (agent_pid != 0) { | |
5164 | *pid = agent_pid; | |
5165 | return 0; | |
5166 | } | |
5167 | ||
5168 | /* In the child: | |
5169 | * | |
5170 | * Make sure the agent goes away when the parent dies */ | |
5171 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5172 | _exit(EXIT_FAILURE); | |
5173 | ||
5174 | /* Check whether our parent died before we were able | |
5175 | * to set the death signal */ | |
5176 | if (getppid() != parent_pid) | |
5177 | _exit(EXIT_SUCCESS); | |
5178 | ||
5179 | /* Don't leak fds to the agent */ | |
9bdc770c | 5180 | close_all_fds(except, n_except); |
6bb92a16 LP |
5181 | |
5182 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5183 | stderr_is_tty = isatty(STDERR_FILENO); | |
5184 | ||
5185 | if (!stdout_is_tty || !stderr_is_tty) { | |
5186 | /* Detach from stdout/stderr. and reopen | |
5187 | * /dev/tty for them. This is important to | |
5188 | * ensure that when systemctl is started via | |
5189 | * popen() or a similar call that expects to | |
5190 | * read EOF we actually do generate EOF and | |
5191 | * not delay this indefinitely by because we | |
5192 | * keep an unused copy of stdin around. */ | |
5193 | fd = open("/dev/tty", O_WRONLY); | |
5194 | if (fd < 0) { | |
5195 | log_error("Failed to open /dev/tty: %m"); | |
5196 | _exit(EXIT_FAILURE); | |
5197 | } | |
5198 | ||
5199 | if (!stdout_is_tty) | |
5200 | dup2(fd, STDOUT_FILENO); | |
5201 | ||
5202 | if (!stderr_is_tty) | |
5203 | dup2(fd, STDERR_FILENO); | |
5204 | ||
5205 | if (fd > 2) | |
5206 | close(fd); | |
5207 | } | |
5208 | ||
5209 | /* Count arguments */ | |
5210 | va_start(ap, path); | |
5211 | for (n = 0; va_arg(ap, char*); n++) | |
5212 | ; | |
5213 | va_end(ap); | |
5214 | ||
5215 | /* Allocate strv */ | |
5216 | l = alloca(sizeof(char *) * (n + 1)); | |
5217 | ||
5218 | /* Fill in arguments */ | |
5219 | va_start(ap, path); | |
5220 | for (i = 0; i <= n; i++) | |
5221 | l[i] = va_arg(ap, char*); | |
5222 | va_end(ap); | |
5223 | ||
5224 | execv(path, l); | |
5225 | _exit(EXIT_FAILURE); | |
5226 | } | |
68faf98c LP |
5227 | |
5228 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5229 | struct rlimit highest, fixed; | |
5230 | ||
5231 | assert(rlim); | |
5232 | ||
5233 | if (setrlimit(resource, rlim) >= 0) | |
5234 | return 0; | |
5235 | ||
5236 | if (errno != EPERM) | |
5237 | return -errno; | |
5238 | ||
5239 | /* So we failed to set the desired setrlimit, then let's try | |
5240 | * to get as close as we can */ | |
5241 | assert_se(getrlimit(resource, &highest) == 0); | |
5242 | ||
5243 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5244 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5245 | ||
5246 | if (setrlimit(resource, &fixed) < 0) | |
5247 | return -errno; | |
5248 | ||
5249 | return 0; | |
5250 | } | |
3d9a4122 | 5251 | |
ab94af92 LP |
5252 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
5253 | char path[sizeof("/proc/")-1+10+sizeof("/environ")], *value = NULL; | |
5254 | int r; | |
5255 | FILE *f; | |
5256 | bool done = false; | |
5257 | size_t l; | |
5258 | ||
5259 | assert(field); | |
5260 | assert(_value); | |
5261 | ||
5262 | if (pid == 0) | |
5263 | pid = getpid(); | |
5264 | ||
5265 | snprintf(path, sizeof(path), "/proc/%lu/environ", (unsigned long) pid); | |
5266 | char_array_0(path); | |
5267 | ||
5268 | f = fopen(path, "re"); | |
5269 | if (!f) | |
5270 | return -errno; | |
5271 | ||
5272 | l = strlen(field); | |
5273 | r = 0; | |
5274 | ||
5275 | do { | |
5276 | char line[LINE_MAX]; | |
5277 | unsigned i; | |
5278 | ||
5279 | for (i = 0; i < sizeof(line)-1; i++) { | |
5280 | int c; | |
5281 | ||
5282 | c = getc(f); | |
5283 | if (_unlikely_(c == EOF)) { | |
5284 | done = true; | |
5285 | break; | |
5286 | } else if (c == 0) | |
5287 | break; | |
5288 | ||
5289 | line[i] = c; | |
5290 | } | |
5291 | line[i] = 0; | |
5292 | ||
5293 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5294 | value = strdup(line + l + 1); | |
5295 | if (!value) { | |
5296 | r = -ENOMEM; | |
5297 | break; | |
5298 | } | |
5299 | ||
5300 | r = 1; | |
5301 | break; | |
5302 | } | |
5303 | ||
5304 | } while (!done); | |
5305 | ||
5306 | fclose(f); | |
5307 | ||
5308 | if (r >= 0) | |
5309 | *_value = value; | |
5310 | ||
5311 | return r; | |
5312 | } | |
d889a206 LP |
5313 | |
5314 | int can_sleep(const char *type) { | |
e67f47e5 | 5315 | char *w, *state; |
d889a206 | 5316 | size_t l, k; |
d889a206 | 5317 | int r; |
e67f47e5 | 5318 | _cleanup_free_ char *p = NULL; |
d889a206 LP |
5319 | |
5320 | assert(type); | |
5321 | ||
679b7d79 LP |
5322 | /* If /sys is read-only we cannot sleep */ |
5323 | if (access("/sys/power/state", W_OK) < 0) | |
5324 | return false; | |
5325 | ||
d889a206 LP |
5326 | r = read_one_line_file("/sys/power/state", &p); |
5327 | if (r < 0) | |
679b7d79 | 5328 | return false; |
d889a206 LP |
5329 | |
5330 | k = strlen(type); | |
e67f47e5 LP |
5331 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) |
5332 | if (l == k && memcmp(w, type, l) == 0) | |
5333 | return true; | |
d889a206 | 5334 | |
e67f47e5 | 5335 | return false; |
d889a206 | 5336 | } |
49dbfa7b | 5337 | |
6524990f LP |
5338 | int can_sleep_disk(const char *type) { |
5339 | char *w, *state; | |
5340 | size_t l, k; | |
5341 | int r; | |
5342 | _cleanup_free_ char *p = NULL; | |
5343 | ||
5344 | assert(type); | |
5345 | ||
679b7d79 LP |
5346 | /* If /sys is read-only we cannot sleep */ |
5347 | if (access("/sys/power/state", W_OK) < 0 || | |
5348 | access("/sys/power/disk", W_OK) < 0) | |
5349 | return false; | |
5350 | ||
6524990f LP |
5351 | r = read_one_line_file("/sys/power/disk", &p); |
5352 | if (r < 0) | |
679b7d79 | 5353 | return false; |
6524990f LP |
5354 | |
5355 | k = strlen(type); | |
5356 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) { | |
5357 | if (l == k && memcmp(w, type, l) == 0) | |
5358 | return true; | |
5359 | ||
5360 | if (l == k + 2 && w[0] == '[' && memcmp(w + 1, type, l - 2) == 0 && w[l-1] == ']') | |
5361 | return true; | |
5362 | } | |
5363 | ||
5364 | return false; | |
5365 | } | |
5366 | ||
49dbfa7b LP |
5367 | bool is_valid_documentation_url(const char *url) { |
5368 | assert(url); | |
5369 | ||
5370 | if (startswith(url, "http://") && url[7]) | |
5371 | return true; | |
5372 | ||
5373 | if (startswith(url, "https://") && url[8]) | |
5374 | return true; | |
5375 | ||
5376 | if (startswith(url, "file:") && url[5]) | |
5377 | return true; | |
5378 | ||
5379 | if (startswith(url, "info:") && url[5]) | |
5380 | return true; | |
5381 | ||
5382 | if (startswith(url, "man:") && url[4]) | |
5383 | return true; | |
5384 | ||
5385 | return false; | |
5386 | } | |
9be346c9 HH |
5387 | |
5388 | bool in_initrd(void) { | |
a05f97b3 | 5389 | static __thread int saved = -1; |
825c6fe5 | 5390 | struct statfs s; |
8f33b5b8 | 5391 | |
825c6fe5 LP |
5392 | if (saved >= 0) |
5393 | return saved; | |
5394 | ||
5395 | /* We make two checks here: | |
5396 | * | |
5397 | * 1. the flag file /etc/initrd-release must exist | |
5398 | * 2. the root file system must be a memory file system | |
5399 | * | |
5400 | * The second check is extra paranoia, since misdetecting an | |
5401 | * initrd can have bad bad consequences due the initrd | |
5402 | * emptying when transititioning to the main systemd. | |
5403 | */ | |
5404 | ||
5405 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5406 | statfs("/", &s) >= 0 && | |
943aad8c | 5407 | is_temporary_fs(&s); |
9be346c9 | 5408 | |
8f33b5b8 | 5409 | return saved; |
9be346c9 | 5410 | } |
069cfc85 LP |
5411 | |
5412 | void warn_melody(void) { | |
e67f47e5 | 5413 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5414 | |
5415 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5416 | if (fd < 0) | |
5417 | return; | |
5418 | ||
040f18ea | 5419 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5420 | |
5421 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5422 | usleep(125*USEC_PER_MSEC); | |
5423 | ||
5424 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5425 | usleep(125*USEC_PER_MSEC); | |
5426 | ||
5427 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5428 | usleep(125*USEC_PER_MSEC); | |
5429 | ||
5430 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5431 | } |
cd3bd60a LP |
5432 | |
5433 | int make_console_stdio(void) { | |
5434 | int fd, r; | |
5435 | ||
5436 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5437 | ||
5438 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5439 | if (fd < 0) { | |
5440 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5441 | return fd; | |
5442 | } | |
5443 | ||
5444 | r = make_stdio(fd); | |
5445 | if (r < 0) { | |
5446 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5447 | return r; | |
5448 | } | |
5449 | ||
5450 | return 0; | |
5451 | } | |
7c5f152a LP |
5452 | |
5453 | int get_home_dir(char **_h) { | |
5454 | char *h; | |
5455 | const char *e; | |
5456 | uid_t u; | |
5457 | struct passwd *p; | |
5458 | ||
5459 | assert(_h); | |
5460 | ||
5461 | /* Take the user specified one */ | |
5462 | e = getenv("HOME"); | |
5463 | if (e) { | |
5464 | h = strdup(e); | |
5465 | if (!h) | |
5466 | return -ENOMEM; | |
5467 | ||
5468 | *_h = h; | |
5469 | return 0; | |
5470 | } | |
5471 | ||
5472 | /* Hardcode home directory for root to avoid NSS */ | |
5473 | u = getuid(); | |
5474 | if (u == 0) { | |
5475 | h = strdup("/root"); | |
5476 | if (!h) | |
5477 | return -ENOMEM; | |
5478 | ||
5479 | *_h = h; | |
5480 | return 0; | |
5481 | } | |
5482 | ||
5483 | /* Check the database... */ | |
5484 | errno = 0; | |
5485 | p = getpwuid(u); | |
5486 | if (!p) | |
e67f47e5 | 5487 | return errno ? -errno : -ESRCH; |
7c5f152a LP |
5488 | |
5489 | if (!path_is_absolute(p->pw_dir)) | |
5490 | return -EINVAL; | |
5491 | ||
5492 | h = strdup(p->pw_dir); | |
5493 | if (!h) | |
5494 | return -ENOMEM; | |
5495 | ||
5496 | *_h = h; | |
5497 | return 0; | |
5498 | } | |
5499 | ||
5500 | int get_shell(char **_sh) { | |
5501 | char *sh; | |
5502 | const char *e; | |
5503 | uid_t u; | |
5504 | struct passwd *p; | |
5505 | ||
5506 | assert(_sh); | |
5507 | ||
5508 | /* Take the user specified one */ | |
5509 | e = getenv("SHELL"); | |
5510 | if (e) { | |
5511 | sh = strdup(e); | |
5512 | if (!sh) | |
5513 | return -ENOMEM; | |
5514 | ||
5515 | *_sh = sh; | |
5516 | return 0; | |
5517 | } | |
5518 | ||
5519 | /* Hardcode home directory for root to avoid NSS */ | |
5520 | u = getuid(); | |
5521 | if (u == 0) { | |
5522 | sh = strdup("/bin/sh"); | |
5523 | if (!sh) | |
5524 | return -ENOMEM; | |
5525 | ||
5526 | *_sh = sh; | |
5527 | return 0; | |
5528 | } | |
5529 | ||
5530 | /* Check the database... */ | |
5531 | errno = 0; | |
5532 | p = getpwuid(u); | |
5533 | if (!p) | |
5534 | return errno ? -errno : -ESRCH; | |
5535 | ||
5536 | if (!path_is_absolute(p->pw_shell)) | |
5537 | return -EINVAL; | |
5538 | ||
5539 | sh = strdup(p->pw_shell); | |
5540 | if (!sh) | |
5541 | return -ENOMEM; | |
5542 | ||
5543 | *_sh = sh; | |
5544 | return 0; | |
5545 | } | |
2fbe635a LP |
5546 | |
5547 | void freep(void *p) { | |
5548 | free(*(void**) p); | |
5549 | } | |
5550 | ||
5551 | void fclosep(FILE **f) { | |
5552 | if (*f) | |
5553 | fclose(*f); | |
5554 | } | |
e67f47e5 | 5555 | |
e985665d ZJS |
5556 | void pclosep(FILE **f) { |
5557 | if (*f) | |
5558 | pclose(*f); | |
5559 | } | |
5560 | ||
e67f47e5 LP |
5561 | void closep(int *fd) { |
5562 | if (*fd >= 0) | |
5563 | close_nointr_nofail(*fd); | |
5564 | } | |
a05f97b3 LP |
5565 | |
5566 | void closedirp(DIR **d) { | |
5567 | if (*d) | |
5568 | closedir(*d); | |
5569 | } | |
25ea79fe ZJS |
5570 | |
5571 | void umaskp(mode_t *u) { | |
5572 | umask(*u); | |
5573 | } | |
0b507b17 LP |
5574 | |
5575 | bool filename_is_safe(const char *p) { | |
5576 | ||
5577 | if (isempty(p)) | |
5578 | return false; | |
5579 | ||
5580 | if (strchr(p, '/')) | |
5581 | return false; | |
5582 | ||
5583 | if (streq(p, ".")) | |
5584 | return false; | |
5585 | ||
5586 | if (streq(p, "..")) | |
5587 | return false; | |
5588 | ||
5589 | if (strlen(p) > FILENAME_MAX) | |
5590 | return false; | |
5591 | ||
5592 | return true; | |
5593 | } | |
5594 | ||
5595 | bool string_is_safe(const char *p) { | |
5596 | const char *t; | |
5597 | ||
5598 | assert(p); | |
5599 | ||
5600 | for (t = p; *t; t++) { | |
01539d6e | 5601 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5602 | return false; |
5603 | ||
011afa76 | 5604 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5605 | return false; |
5606 | } | |
5607 | ||
5608 | return true; | |
5609 | } | |
cfbc22ab | 5610 | |
e884315e LP |
5611 | bool path_is_safe(const char *p) { |
5612 | ||
5613 | if (isempty(p)) | |
5614 | return false; | |
5615 | ||
5616 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5617 | return false; | |
5618 | ||
5619 | if (strlen(p) > PATH_MAX) | |
5620 | return false; | |
5621 | ||
5622 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5623 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5624 | return false; | |
5625 | ||
5626 | if (strstr(p, "//")) | |
5627 | return false; | |
5628 | ||
5629 | return true; | |
5630 | } | |
5631 | ||
a9e12476 KS |
5632 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5633 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5634 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5635 | size_t l, u, idx; |
5636 | const void *p; | |
5637 | int comparison; | |
5638 | ||
5639 | l = 0; | |
5640 | u = nmemb; | |
5641 | while (l < u) { | |
5642 | idx = (l + u) / 2; | |
5643 | p = (void *)(((const char *) base) + (idx * size)); | |
5644 | comparison = compar(key, p, arg); | |
5645 | if (comparison < 0) | |
5646 | u = idx; | |
5647 | else if (comparison > 0) | |
5648 | l = idx + 1; | |
5649 | else | |
5650 | return (void *)p; | |
5651 | } | |
5652 | return NULL; | |
5653 | } | |
09017585 MS |
5654 | |
5655 | bool is_locale_utf8(void) { | |
5656 | const char *set; | |
5657 | static int cached_answer = -1; | |
5658 | ||
5659 | if (cached_answer >= 0) | |
5660 | goto out; | |
5661 | ||
5662 | if (!setlocale(LC_ALL, "")) { | |
5663 | cached_answer = true; | |
5664 | goto out; | |
5665 | } | |
5666 | ||
5667 | set = nl_langinfo(CODESET); | |
5668 | if (!set) { | |
5669 | cached_answer = true; | |
5670 | goto out; | |
5671 | } | |
5672 | ||
5673 | cached_answer = streq(set, "UTF-8"); | |
5674 | out: | |
5675 | return (bool)cached_answer; | |
5676 | } | |
c339d977 MS |
5677 | |
5678 | const char *draw_special_char(DrawSpecialChar ch) { | |
5679 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
5680 | /* UTF-8 */ { | |
45a5ff0d MS |
5681 | [DRAW_TREE_VERT] = "\342\224\202 ", /* │ */ |
5682 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ | |
5683 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5684 | [DRAW_TREE_SPACE] = " ", /* */ |
45a5ff0d | 5685 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243 ", /* ‣ */ |
c339d977 MS |
5686 | }, |
5687 | /* ASCII fallback */ { | |
45a5ff0d MS |
5688 | [DRAW_TREE_VERT] = "| ", |
5689 | [DRAW_TREE_BRANCH] = "|-", | |
5690 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5691 | [DRAW_TREE_SPACE] = " ", |
45a5ff0d | 5692 | [DRAW_TRIANGULAR_BULLET] = "> ", |
c339d977 MS |
5693 | } |
5694 | }; | |
5695 | ||
5696 | return draw_table[!is_locale_utf8()][ch]; | |
5697 | } | |
409bc9c3 LP |
5698 | |
5699 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5700 | const char *f; | |
5701 | char *t, *r; | |
5702 | size_t l, old_len, new_len; | |
5703 | ||
5704 | assert(text); | |
5705 | assert(old_string); | |
5706 | assert(new_string); | |
5707 | ||
5708 | old_len = strlen(old_string); | |
5709 | new_len = strlen(new_string); | |
5710 | ||
5711 | l = strlen(text); | |
5712 | r = new(char, l+1); | |
5713 | if (!r) | |
5714 | return NULL; | |
5715 | ||
5716 | f = text; | |
5717 | t = r; | |
5718 | while (*f) { | |
5719 | char *a; | |
5720 | size_t d, nl; | |
5721 | ||
5722 | if (!startswith(f, old_string)) { | |
5723 | *(t++) = *(f++); | |
5724 | continue; | |
5725 | } | |
5726 | ||
5727 | d = t - r; | |
5728 | nl = l - old_len + new_len; | |
5729 | a = realloc(r, nl + 1); | |
5730 | if (!a) | |
5731 | goto oom; | |
5732 | ||
5733 | l = nl; | |
5734 | r = a; | |
5735 | t = r + d; | |
5736 | ||
5737 | t = stpcpy(t, new_string); | |
5738 | f += old_len; | |
5739 | } | |
5740 | ||
5741 | *t = 0; | |
5742 | return r; | |
5743 | ||
5744 | oom: | |
5745 | free(r); | |
5746 | return NULL; | |
5747 | } | |
e8bc0ea2 LP |
5748 | |
5749 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5750 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5751 | enum { |
5752 | STATE_OTHER, | |
5753 | STATE_ESCAPE, | |
5754 | STATE_BRACKET | |
5755 | } state = STATE_OTHER; | |
5756 | char *obuf = NULL; | |
5757 | size_t osz = 0, isz; | |
5758 | FILE *f; | |
5759 | ||
5760 | assert(ibuf); | |
5761 | assert(*ibuf); | |
5762 | ||
5763 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5764 | ||
5765 | isz = _isz ? *_isz : strlen(*ibuf); | |
5766 | ||
5767 | f = open_memstream(&obuf, &osz); | |
5768 | if (!f) | |
5769 | return NULL; | |
5770 | ||
5771 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5772 | ||
5773 | switch (state) { | |
5774 | ||
5775 | case STATE_OTHER: | |
5776 | if (i >= *ibuf + isz) /* EOT */ | |
5777 | break; | |
5778 | else if (*i == '\x1B') | |
5779 | state = STATE_ESCAPE; | |
5780 | else if (*i == '\t') | |
5781 | fputs(" ", f); | |
5782 | else | |
5783 | fputc(*i, f); | |
5784 | break; | |
5785 | ||
5786 | case STATE_ESCAPE: | |
5787 | if (i >= *ibuf + isz) { /* EOT */ | |
5788 | fputc('\x1B', f); | |
5789 | break; | |
5790 | } else if (*i == '[') { | |
5791 | state = STATE_BRACKET; | |
5792 | begin = i + 1; | |
5793 | } else { | |
5794 | fputc('\x1B', f); | |
5795 | fputc(*i, f); | |
5796 | state = STATE_OTHER; | |
5797 | } | |
5798 | ||
5799 | break; | |
5800 | ||
5801 | case STATE_BRACKET: | |
5802 | ||
5803 | if (i >= *ibuf + isz || /* EOT */ | |
5804 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5805 | fputc('\x1B', f); | |
5806 | fputc('[', f); | |
5807 | state = STATE_OTHER; | |
5808 | i = begin-1; | |
5809 | } else if (*i == 'm') | |
5810 | state = STATE_OTHER; | |
5811 | break; | |
5812 | } | |
5813 | } | |
5814 | ||
5815 | if (ferror(f)) { | |
5816 | fclose(f); | |
5817 | free(obuf); | |
5818 | return NULL; | |
5819 | } | |
5820 | ||
5821 | fclose(f); | |
5822 | ||
5823 | free(*ibuf); | |
5824 | *ibuf = obuf; | |
5825 | ||
5826 | if (_isz) | |
5827 | *_isz = osz; | |
5828 | ||
5829 | return obuf; | |
5830 | } | |
240dbaa4 LP |
5831 | |
5832 | int on_ac_power(void) { | |
5833 | bool found_offline = false, found_online = false; | |
5834 | _cleanup_closedir_ DIR *d = NULL; | |
5835 | ||
5836 | d = opendir("/sys/class/power_supply"); | |
5837 | if (!d) | |
5838 | return -errno; | |
5839 | ||
5840 | for (;;) { | |
5841 | struct dirent *de; | |
5842 | union dirent_storage buf; | |
5843 | _cleanup_free_ char *p = NULL; | |
5844 | _cleanup_close_ int fd = -1, device = -1; | |
5845 | char contents[6]; | |
5846 | ssize_t n; | |
5847 | int k; | |
5848 | ||
5849 | k = readdir_r(d, &buf.de, &de); | |
5850 | if (k != 0) | |
5851 | return -k; | |
5852 | ||
5853 | if (!de) | |
5854 | break; | |
5855 | ||
5856 | if (ignore_file(de->d_name)) | |
5857 | continue; | |
5858 | ||
5859 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5860 | if (device < 0) { | |
5861 | if (errno == ENOENT || errno == ENOTDIR) | |
5862 | continue; | |
5863 | ||
5864 | return -errno; | |
5865 | } | |
5866 | ||
5867 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5868 | if (fd < 0) { | |
5869 | if (errno == ENOENT) | |
5870 | continue; | |
5871 | ||
5872 | return -errno; | |
5873 | } | |
5874 | ||
5875 | n = read(fd, contents, sizeof(contents)); | |
5876 | if (n < 0) | |
5877 | return -errno; | |
5878 | ||
5879 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5880 | continue; | |
5881 | ||
5882 | close_nointr_nofail(fd); | |
5883 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5884 | if (fd < 0) { | |
5885 | if (errno == ENOENT) | |
5886 | continue; | |
5887 | ||
5888 | return -errno; | |
5889 | } | |
5890 | ||
5891 | n = read(fd, contents, sizeof(contents)); | |
5892 | if (n < 0) | |
5893 | return -errno; | |
5894 | ||
5895 | if (n != 2 || contents[1] != '\n') | |
5896 | return -EIO; | |
5897 | ||
5898 | if (contents[0] == '1') { | |
5899 | found_online = true; | |
5900 | break; | |
5901 | } else if (contents[0] == '0') | |
5902 | found_offline = true; | |
5903 | else | |
5904 | return -EIO; | |
5905 | } | |
5906 | ||
5907 | return found_online || !found_offline; | |
5908 | } |