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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" |
4d1a6904 | 73 | #include "env-util.h" |
56cf987f | 74 | |
9a0e6896 LP |
75 | int saved_argc = 0; |
76 | char **saved_argv = NULL; | |
9086e840 | 77 | |
28917d7d | 78 | static volatile unsigned cached_columns = 0; |
ed757c0c | 79 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 80 | |
37f85e66 | 81 | size_t page_size(void) { |
82 | static __thread size_t pgsz = 0; | |
83 | long r; | |
84 | ||
87d2c1ff | 85 | if (_likely_(pgsz > 0)) |
37f85e66 | 86 | return pgsz; |
87 | ||
e67f47e5 LP |
88 | r = sysconf(_SC_PAGESIZE); |
89 | assert(r > 0); | |
37f85e66 | 90 | |
91 | pgsz = (size_t) r; | |
37f85e66 | 92 | return pgsz; |
93 | } | |
94 | ||
e05797fb LP |
95 | bool streq_ptr(const char *a, const char *b) { |
96 | ||
97 | /* Like streq(), but tries to make sense of NULL pointers */ | |
98 | ||
99 | if (a && b) | |
100 | return streq(a, b); | |
101 | ||
102 | if (!a && !b) | |
103 | return true; | |
104 | ||
105 | return false; | |
106 | } | |
107 | ||
8c7c140f | 108 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
109 | size_t sl, pl; |
110 | ||
111 | assert(s); | |
112 | assert(postfix); | |
113 | ||
114 | sl = strlen(s); | |
115 | pl = strlen(postfix); | |
116 | ||
d4d0d4db | 117 | if (pl == 0) |
8c7c140f | 118 | return (char*) s + sl; |
d4d0d4db | 119 | |
60918275 | 120 | if (sl < pl) |
8c7c140f LP |
121 | return NULL; |
122 | ||
123 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
124 | return NULL; | |
60918275 | 125 | |
8c7c140f | 126 | return (char*) s + sl - pl; |
60918275 LP |
127 | } |
128 | ||
e8988fc2 LP |
129 | char* startswith(const char *s, const char *prefix) { |
130 | const char *a, *b; | |
60918275 LP |
131 | |
132 | assert(s); | |
133 | assert(prefix); | |
134 | ||
e8988fc2 LP |
135 | a = s, b = prefix; |
136 | for (;;) { | |
137 | if (*b == 0) | |
138 | return (char*) a; | |
139 | if (*a != *b) | |
140 | return NULL; | |
60918275 | 141 | |
e8988fc2 LP |
142 | a++, b++; |
143 | } | |
60918275 LP |
144 | } |
145 | ||
e8988fc2 LP |
146 | char* startswith_no_case(const char *s, const char *prefix) { |
147 | const char *a, *b; | |
3177a7fa MAP |
148 | |
149 | assert(s); | |
150 | assert(prefix); | |
151 | ||
e8988fc2 LP |
152 | a = s, b = prefix; |
153 | for (;;) { | |
154 | if (*b == 0) | |
155 | return (char*) a; | |
156 | if (tolower(*a) != tolower(*b)) | |
157 | return NULL; | |
3177a7fa | 158 | |
e8988fc2 LP |
159 | a++, b++; |
160 | } | |
3177a7fa MAP |
161 | } |
162 | ||
79d6d816 LP |
163 | bool first_word(const char *s, const char *word) { |
164 | size_t sl, wl; | |
165 | ||
166 | assert(s); | |
167 | assert(word); | |
168 | ||
169 | sl = strlen(s); | |
170 | wl = strlen(word); | |
171 | ||
172 | if (sl < wl) | |
173 | return false; | |
174 | ||
d4d0d4db LP |
175 | if (wl == 0) |
176 | return true; | |
177 | ||
79d6d816 LP |
178 | if (memcmp(s, word, wl) != 0) |
179 | return false; | |
180 | ||
d4d0d4db LP |
181 | return s[wl] == 0 || |
182 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
183 | } |
184 | ||
42f4e3c4 | 185 | int close_nointr(int fd) { |
b0ee8068 | 186 | int r; |
60918275 | 187 | |
b0ee8068 CW |
188 | assert(fd >= 0); |
189 | r = close(fd); | |
190 | ||
191 | /* Just ignore EINTR; a retry loop is the wrong | |
192 | * thing to do on Linux. | |
193 | * | |
194 | * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html | |
195 | * https://bugzilla.gnome.org/show_bug.cgi?id=682819 | |
196 | * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR | |
197 | * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain | |
198 | */ | |
199 | if (_unlikely_(r < 0 && errno == EINTR)) | |
200 | return 0; | |
201 | else if (r >= 0) | |
202 | return r; | |
203 | else | |
204 | return -errno; | |
60918275 | 205 | } |
85261803 | 206 | |
85f136b5 | 207 | void close_nointr_nofail(int fd) { |
80876c20 | 208 | int saved_errno = errno; |
85f136b5 LP |
209 | |
210 | /* like close_nointr() but cannot fail, and guarantees errno | |
211 | * is unchanged */ | |
212 | ||
213 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
214 | |
215 | errno = saved_errno; | |
85f136b5 LP |
216 | } |
217 | ||
5b6319dc LP |
218 | void close_many(const int fds[], unsigned n_fd) { |
219 | unsigned i; | |
220 | ||
221 | for (i = 0; i < n_fd; i++) | |
222 | close_nointr_nofail(fds[i]); | |
223 | } | |
224 | ||
85261803 LP |
225 | int parse_boolean(const char *v) { |
226 | assert(v); | |
227 | ||
b43d1d01 | 228 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || strcaseeq(v, "on")) |
85261803 | 229 | return 1; |
b43d1d01 | 230 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || strcaseeq(v, "off")) |
85261803 LP |
231 | return 0; |
232 | ||
233 | return -EINVAL; | |
234 | } | |
235 | ||
3ba686c1 | 236 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 237 | unsigned long ul = 0; |
3ba686c1 LP |
238 | pid_t pid; |
239 | int r; | |
240 | ||
241 | assert(s); | |
242 | assert(ret_pid); | |
243 | ||
e67f47e5 LP |
244 | r = safe_atolu(s, &ul); |
245 | if (r < 0) | |
3ba686c1 LP |
246 | return r; |
247 | ||
248 | pid = (pid_t) ul; | |
249 | ||
250 | if ((unsigned long) pid != ul) | |
251 | return -ERANGE; | |
252 | ||
253 | if (pid <= 0) | |
254 | return -ERANGE; | |
255 | ||
256 | *ret_pid = pid; | |
257 | return 0; | |
258 | } | |
259 | ||
034a2a52 LP |
260 | int parse_uid(const char *s, uid_t* ret_uid) { |
261 | unsigned long ul = 0; | |
262 | uid_t uid; | |
263 | int r; | |
264 | ||
265 | assert(s); | |
266 | assert(ret_uid); | |
267 | ||
e67f47e5 LP |
268 | r = safe_atolu(s, &ul); |
269 | if (r < 0) | |
034a2a52 LP |
270 | return r; |
271 | ||
272 | uid = (uid_t) ul; | |
273 | ||
274 | if ((unsigned long) uid != ul) | |
275 | return -ERANGE; | |
276 | ||
277 | *ret_uid = uid; | |
278 | return 0; | |
279 | } | |
280 | ||
85261803 LP |
281 | int safe_atou(const char *s, unsigned *ret_u) { |
282 | char *x = NULL; | |
034c6ed7 | 283 | unsigned long l; |
85261803 LP |
284 | |
285 | assert(s); | |
286 | assert(ret_u); | |
287 | ||
288 | errno = 0; | |
289 | l = strtoul(s, &x, 0); | |
290 | ||
f3910003 | 291 | if (!x || x == s || *x || errno) |
85261803 LP |
292 | return errno ? -errno : -EINVAL; |
293 | ||
034c6ed7 | 294 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
295 | return -ERANGE; |
296 | ||
297 | *ret_u = (unsigned) l; | |
298 | return 0; | |
299 | } | |
300 | ||
301 | int safe_atoi(const char *s, int *ret_i) { | |
302 | char *x = NULL; | |
034c6ed7 | 303 | long l; |
85261803 LP |
304 | |
305 | assert(s); | |
306 | assert(ret_i); | |
307 | ||
308 | errno = 0; | |
309 | l = strtol(s, &x, 0); | |
310 | ||
f3910003 | 311 | if (!x || x == s || *x || errno) |
85261803 LP |
312 | return errno ? -errno : -EINVAL; |
313 | ||
034c6ed7 | 314 | if ((long) (int) l != l) |
85261803 LP |
315 | return -ERANGE; |
316 | ||
034c6ed7 LP |
317 | *ret_i = (int) l; |
318 | return 0; | |
319 | } | |
320 | ||
034c6ed7 LP |
321 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
322 | char *x = NULL; | |
323 | unsigned long long l; | |
324 | ||
325 | assert(s); | |
326 | assert(ret_llu); | |
327 | ||
328 | errno = 0; | |
329 | l = strtoull(s, &x, 0); | |
330 | ||
f3910003 | 331 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
332 | return errno ? -errno : -EINVAL; |
333 | ||
334 | *ret_llu = l; | |
335 | return 0; | |
336 | } | |
337 | ||
338 | int safe_atolli(const char *s, long long int *ret_lli) { | |
339 | char *x = NULL; | |
340 | long long l; | |
341 | ||
342 | assert(s); | |
343 | assert(ret_lli); | |
344 | ||
345 | errno = 0; | |
346 | l = strtoll(s, &x, 0); | |
347 | ||
f3910003 | 348 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
349 | return errno ? -errno : -EINVAL; |
350 | ||
351 | *ret_lli = l; | |
85261803 LP |
352 | return 0; |
353 | } | |
a41e8209 | 354 | |
a41e8209 | 355 | /* Split a string into words. */ |
65d2ebdc | 356 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
357 | char *current; |
358 | ||
359 | current = *state ? *state : (char*) c; | |
360 | ||
361 | if (!*current || *c == 0) | |
362 | return NULL; | |
363 | ||
65d2ebdc LP |
364 | current += strspn(current, separator); |
365 | *l = strcspn(current, separator); | |
82919e3d LP |
366 | *state = current+*l; |
367 | ||
368 | return (char*) current; | |
369 | } | |
370 | ||
034c6ed7 LP |
371 | /* Split a string into words, but consider strings enclosed in '' and |
372 | * "" as words even if they include spaces. */ | |
373 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
374 | char *current, *e; |
375 | bool escaped = false; | |
034c6ed7 LP |
376 | |
377 | current = *state ? *state : (char*) c; | |
378 | ||
379 | if (!*current || *c == 0) | |
380 | return NULL; | |
381 | ||
382 | current += strspn(current, WHITESPACE); | |
383 | ||
384 | if (*current == '\'') { | |
385 | current ++; | |
034c6ed7 | 386 | |
0bab36f2 LP |
387 | for (e = current; *e; e++) { |
388 | if (escaped) | |
389 | escaped = false; | |
390 | else if (*e == '\\') | |
391 | escaped = true; | |
392 | else if (*e == '\'') | |
393 | break; | |
394 | } | |
395 | ||
396 | *l = e-current; | |
397 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
398 | } else if (*current == '\"') { |
399 | current ++; | |
034c6ed7 | 400 | |
0bab36f2 LP |
401 | for (e = current; *e; e++) { |
402 | if (escaped) | |
403 | escaped = false; | |
404 | else if (*e == '\\') | |
405 | escaped = true; | |
406 | else if (*e == '\"') | |
407 | break; | |
408 | } | |
409 | ||
410 | *l = e-current; | |
411 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 412 | } else { |
0bab36f2 LP |
413 | for (e = current; *e; e++) { |
414 | if (escaped) | |
415 | escaped = false; | |
416 | else if (*e == '\\') | |
417 | escaped = true; | |
418 | else if (strchr(WHITESPACE, *e)) | |
419 | break; | |
420 | } | |
421 | *l = e-current; | |
422 | *state = e; | |
034c6ed7 LP |
423 | } |
424 | ||
425 | return (char*) current; | |
426 | } | |
427 | ||
034c6ed7 LP |
428 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
429 | int r; | |
2fbe635a | 430 | _cleanup_fclose_ FILE *f = NULL; |
20c03b7b | 431 | char fn[PATH_MAX], line[LINE_MAX], *p; |
bb00e604 | 432 | long unsigned ppid; |
034c6ed7 | 433 | |
8480e784 | 434 | assert(pid > 0); |
034c6ed7 LP |
435 | assert(_ppid); |
436 | ||
bb00e604 | 437 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
8480e784 | 438 | char_array_0(fn); |
034c6ed7 | 439 | |
2fbe635a LP |
440 | f = fopen(fn, "re"); |
441 | if (!f) | |
034c6ed7 LP |
442 | return -errno; |
443 | ||
2fbe635a | 444 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 445 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
446 | return r; |
447 | } | |
448 | ||
034c6ed7 LP |
449 | /* Let's skip the pid and comm fields. The latter is enclosed |
450 | * in () but does not escape any () in its value, so let's | |
451 | * skip over it manually */ | |
452 | ||
2fbe635a LP |
453 | p = strrchr(line, ')'); |
454 | if (!p) | |
034c6ed7 LP |
455 | return -EIO; |
456 | ||
457 | p++; | |
458 | ||
459 | if (sscanf(p, " " | |
460 | "%*c " /* state */ | |
bb00e604 | 461 | "%lu ", /* ppid */ |
034c6ed7 LP |
462 | &ppid) != 1) |
463 | return -EIO; | |
464 | ||
bb00e604 | 465 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
466 | return -ERANGE; |
467 | ||
468 | *_ppid = (pid_t) ppid; | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
7640a5de | 473 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
e67f47e5 | 474 | _cleanup_fclose_ FILE *f = NULL; |
7640a5de LP |
475 | char fn[PATH_MAX], line[LINE_MAX], *p; |
476 | ||
477 | assert(pid > 0); | |
478 | assert(st); | |
479 | ||
480 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); | |
481 | char_array_0(fn); | |
482 | ||
e67f47e5 LP |
483 | f = fopen(fn, "re"); |
484 | if (!f) | |
7640a5de LP |
485 | return -errno; |
486 | ||
e67f47e5 LP |
487 | if (!fgets(line, sizeof(line), f)) { |
488 | if (ferror(f)) | |
489 | return -errno; | |
7640a5de | 490 | |
e67f47e5 LP |
491 | return -EIO; |
492 | } | |
7640a5de LP |
493 | |
494 | /* Let's skip the pid and comm fields. The latter is enclosed | |
495 | * in () but does not escape any () in its value, so let's | |
496 | * skip over it manually */ | |
497 | ||
e67f47e5 LP |
498 | p = strrchr(line, ')'); |
499 | if (!p) | |
7640a5de LP |
500 | return -EIO; |
501 | ||
502 | p++; | |
503 | ||
504 | if (sscanf(p, " " | |
505 | "%*c " /* state */ | |
506 | "%*d " /* ppid */ | |
507 | "%*d " /* pgrp */ | |
508 | "%*d " /* session */ | |
509 | "%*d " /* tty_nr */ | |
510 | "%*d " /* tpgid */ | |
511 | "%*u " /* flags */ | |
512 | "%*u " /* minflt */ | |
513 | "%*u " /* cminflt */ | |
514 | "%*u " /* majflt */ | |
515 | "%*u " /* cmajflt */ | |
516 | "%*u " /* utime */ | |
517 | "%*u " /* stime */ | |
518 | "%*d " /* cutime */ | |
519 | "%*d " /* cstime */ | |
520 | "%*d " /* priority */ | |
521 | "%*d " /* nice */ | |
522 | "%*d " /* num_threads */ | |
523 | "%*d " /* itrealvalue */ | |
524 | "%llu " /* starttime */, | |
525 | st) != 1) | |
526 | return -EIO; | |
527 | ||
528 | return 0; | |
529 | } | |
530 | ||
034c6ed7 | 531 | int write_one_line_file(const char *fn, const char *line) { |
e67f47e5 | 532 | _cleanup_fclose_ FILE *f = NULL; |
034c6ed7 LP |
533 | |
534 | assert(fn); | |
535 | assert(line); | |
536 | ||
03ad1136 LP |
537 | f = fopen(fn, "we"); |
538 | if (!f) | |
034c6ed7 LP |
539 | return -errno; |
540 | ||
34ca941c | 541 | errno = 0; |
e67f47e5 LP |
542 | if (fputs(line, f) < 0) |
543 | return errno ? -errno : -EIO; | |
034c6ed7 | 544 | |
8e1bd70d LP |
545 | if (!endswith(line, "\n")) |
546 | fputc('\n', f); | |
547 | ||
151b190e LP |
548 | fflush(f); |
549 | ||
e67f47e5 LP |
550 | if (ferror(f)) |
551 | return errno ? -errno : -EIO; | |
151b190e | 552 | |
e67f47e5 | 553 | return 0; |
034c6ed7 LP |
554 | } |
555 | ||
34ca941c LP |
556 | int fchmod_umask(int fd, mode_t m) { |
557 | mode_t u; | |
558 | int r; | |
559 | ||
560 | u = umask(0777); | |
561 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
562 | umask(u); | |
563 | ||
564 | return r; | |
565 | } | |
566 | ||
567 | int write_one_line_file_atomic(const char *fn, const char *line) { | |
e884315e LP |
568 | _cleanup_fclose_ FILE *f = NULL; |
569 | _cleanup_free_ char *p = NULL; | |
34ca941c | 570 | int r; |
34ca941c LP |
571 | |
572 | assert(fn); | |
573 | assert(line); | |
574 | ||
575 | r = fopen_temporary(fn, &f, &p); | |
576 | if (r < 0) | |
577 | return r; | |
578 | ||
579 | fchmod_umask(fileno(f), 0644); | |
580 | ||
581 | errno = 0; | |
582 | if (fputs(line, f) < 0) { | |
583 | r = -errno; | |
584 | goto finish; | |
585 | } | |
586 | ||
587 | if (!endswith(line, "\n")) | |
588 | fputc('\n', f); | |
589 | ||
590 | fflush(f); | |
591 | ||
e884315e LP |
592 | if (ferror(f)) |
593 | r = errno ? -errno : -EIO; | |
594 | else { | |
34ca941c LP |
595 | if (rename(p, fn) < 0) |
596 | r = -errno; | |
597 | else | |
598 | r = 0; | |
599 | } | |
600 | ||
601 | finish: | |
602 | if (r < 0) | |
603 | unlink(p); | |
604 | ||
34ca941c LP |
605 | return r; |
606 | } | |
607 | ||
034c6ed7 | 608 | int read_one_line_file(const char *fn, char **line) { |
2fbe635a | 609 | _cleanup_fclose_ FILE *f = NULL; |
97c4a07d | 610 | char t[LINE_MAX], *c; |
034c6ed7 LP |
611 | |
612 | assert(fn); | |
613 | assert(line); | |
614 | ||
4099a281 LP |
615 | f = fopen(fn, "re"); |
616 | if (!f) | |
034c6ed7 LP |
617 | return -errno; |
618 | ||
4099a281 LP |
619 | if (!fgets(t, sizeof(t), f)) { |
620 | ||
2fbe635a | 621 | if (ferror(f)) |
e67f47e5 | 622 | return errno ? -errno : -EIO; |
4099a281 LP |
623 | |
624 | t[0] = 0; | |
034c6ed7 LP |
625 | } |
626 | ||
4099a281 | 627 | c = strdup(t); |
2fbe635a LP |
628 | if (!c) |
629 | return -ENOMEM; | |
6f9a471a LP |
630 | truncate_nl(c); |
631 | ||
034c6ed7 | 632 | *line = c; |
2fbe635a | 633 | return 0; |
034c6ed7 | 634 | } |
44d8db9e | 635 | |
34ca941c | 636 | int read_full_file(const char *fn, char **contents, size_t *size) { |
2fbe635a | 637 | _cleanup_fclose_ FILE *f = NULL; |
97c4a07d | 638 | size_t n, l; |
2fbe635a | 639 | _cleanup_free_ char *buf = NULL; |
97c4a07d LP |
640 | struct stat st; |
641 | ||
d2a30975 LP |
642 | assert(fn); |
643 | assert(contents); | |
644 | ||
2fbe635a LP |
645 | f = fopen(fn, "re"); |
646 | if (!f) | |
97c4a07d LP |
647 | return -errno; |
648 | ||
2fbe635a LP |
649 | if (fstat(fileno(f), &st) < 0) |
650 | return -errno; | |
97c4a07d | 651 | |
34ca941c | 652 | /* Safety check */ |
2fbe635a LP |
653 | if (st.st_size > 4*1024*1024) |
654 | return -E2BIG; | |
34ca941c | 655 | |
97c4a07d LP |
656 | n = st.st_size > 0 ? st.st_size : LINE_MAX; |
657 | l = 0; | |
658 | ||
659 | for (;;) { | |
660 | char *t; | |
661 | size_t k; | |
662 | ||
2fbe635a LP |
663 | t = realloc(buf, n+1); |
664 | if (!t) | |
665 | return -ENOMEM; | |
97c4a07d LP |
666 | |
667 | buf = t; | |
668 | k = fread(buf + l, 1, n - l, f); | |
669 | ||
670 | if (k <= 0) { | |
2fbe635a LP |
671 | if (ferror(f)) |
672 | return -errno; | |
97c4a07d LP |
673 | |
674 | break; | |
675 | } | |
676 | ||
677 | l += k; | |
678 | n *= 2; | |
679 | ||
680 | /* Safety check */ | |
2fbe635a LP |
681 | if (n > 4*1024*1024) |
682 | return -E2BIG; | |
97c4a07d LP |
683 | } |
684 | ||
f8440af5 | 685 | buf[l] = 0; |
97c4a07d LP |
686 | *contents = buf; |
687 | buf = NULL; | |
688 | ||
34ca941c LP |
689 | if (size) |
690 | *size = l; | |
691 | ||
2fbe635a | 692 | return 0; |
97c4a07d LP |
693 | } |
694 | ||
695 | int parse_env_file( | |
696 | const char *fname, | |
c899f8c6 | 697 | const char *separator, ...) { |
97c4a07d | 698 | |
ce8a6aa1 | 699 | int r = 0; |
44d91056 | 700 | char *contents = NULL, *p; |
97c4a07d LP |
701 | |
702 | assert(fname); | |
c899f8c6 | 703 | assert(separator); |
97c4a07d | 704 | |
34ca941c | 705 | if ((r = read_full_file(fname, &contents, NULL)) < 0) |
97c4a07d LP |
706 | return r; |
707 | ||
708 | p = contents; | |
709 | for (;;) { | |
710 | const char *key = NULL; | |
711 | ||
c899f8c6 | 712 | p += strspn(p, separator); |
97c4a07d LP |
713 | p += strspn(p, WHITESPACE); |
714 | ||
715 | if (!*p) | |
716 | break; | |
717 | ||
718 | if (!strchr(COMMENTS, *p)) { | |
719 | va_list ap; | |
720 | char **value; | |
721 | ||
c899f8c6 | 722 | va_start(ap, separator); |
97c4a07d LP |
723 | while ((key = va_arg(ap, char *))) { |
724 | size_t n; | |
725 | char *v; | |
726 | ||
727 | value = va_arg(ap, char **); | |
728 | ||
729 | n = strlen(key); | |
641906e9 | 730 | if (!strneq(p, key, n) || |
97c4a07d LP |
731 | p[n] != '=') |
732 | continue; | |
733 | ||
734 | p += n + 1; | |
c899f8c6 | 735 | n = strcspn(p, separator); |
97c4a07d LP |
736 | |
737 | if (n >= 2 && | |
e7db37dd LP |
738 | strchr(QUOTES, p[0]) && |
739 | p[n-1] == p[0]) | |
97c4a07d LP |
740 | v = strndup(p+1, n-2); |
741 | else | |
742 | v = strndup(p, n); | |
743 | ||
744 | if (!v) { | |
745 | r = -ENOMEM; | |
746 | va_end(ap); | |
747 | goto fail; | |
748 | } | |
749 | ||
dd36de4d KS |
750 | if (v[0] == '\0') { |
751 | /* return empty value strings as NULL */ | |
752 | free(v); | |
753 | v = NULL; | |
754 | } | |
755 | ||
97c4a07d LP |
756 | free(*value); |
757 | *value = v; | |
758 | ||
759 | p += n; | |
ce8a6aa1 LP |
760 | |
761 | r ++; | |
97c4a07d LP |
762 | break; |
763 | } | |
764 | va_end(ap); | |
765 | } | |
766 | ||
767 | if (!key) | |
c899f8c6 | 768 | p += strcspn(p, separator); |
97c4a07d LP |
769 | } |
770 | ||
97c4a07d LP |
771 | fail: |
772 | free(contents); | |
773 | return r; | |
774 | } | |
775 | ||
dfbacb6f | 776 | int load_env_file(const char *fname, char ***rl) { |
8c7be95e | 777 | |
dfbacb6f LP |
778 | _cleanup_fclose_ FILE *f; |
779 | _cleanup_strv_free_ char **m = NULL; | |
780 | _cleanup_free_ char *c = NULL; | |
8c7be95e LP |
781 | |
782 | assert(fname); | |
783 | assert(rl); | |
784 | ||
dfbacb6f LP |
785 | /* This reads an environment file, but will not complain about |
786 | * any invalid assignments, that needs to be done by the | |
787 | * caller */ | |
788 | ||
b9893505 ZJS |
789 | f = fopen(fname, "re"); |
790 | if (!f) | |
8c7be95e LP |
791 | return -errno; |
792 | ||
793 | while (!feof(f)) { | |
dfbacb6f | 794 | char l[LINE_MAX], *p, *cs, *b; |
8c7be95e LP |
795 | |
796 | if (!fgets(l, sizeof(l), f)) { | |
dfbacb6f | 797 | if (ferror(f)) |
b9893505 | 798 | return -errno; |
dfbacb6f LP |
799 | |
800 | /* The previous line was a continuation line? | |
801 | * Let's process it now, before we leave the | |
802 | * loop */ | |
803 | if (c) | |
804 | goto process; | |
805 | ||
806 | break; | |
8c7be95e LP |
807 | } |
808 | ||
dfbacb6f LP |
809 | /* Is this a continuation line? If so, just append |
810 | * this to c, and go to next line right-away */ | |
565d91fd MV |
811 | cs = endswith(l, "\\\n"); |
812 | if (cs) { | |
565d91fd MV |
813 | *cs = '\0'; |
814 | b = strappend(c, l); | |
b9893505 | 815 | if (!b) |
dfbacb6f | 816 | return -ENOMEM; |
b9893505 | 817 | |
565d91fd MV |
818 | free(c); |
819 | c = b; | |
565d91fd MV |
820 | continue; |
821 | } | |
822 | ||
dfbacb6f LP |
823 | /* If the previous line was a continuation line, |
824 | * append the current line to it */ | |
565d91fd MV |
825 | if (c) { |
826 | b = strappend(c, l); | |
b9893505 | 827 | if (!b) |
dfbacb6f | 828 | return -ENOMEM; |
b9893505 | 829 | |
565d91fd MV |
830 | free(c); |
831 | c = b; | |
832 | } | |
833 | ||
dfbacb6f | 834 | process: |
565d91fd | 835 | p = strstrip(c ? c : l); |
8c7be95e | 836 | |
dfbacb6f LP |
837 | if (*p && !strchr(COMMENTS, *p)) { |
838 | _cleanup_free_ char *u; | |
839 | int k; | |
8c7be95e | 840 | |
dfbacb6f LP |
841 | u = normalize_env_assignment(p); |
842 | if (!u) | |
843 | return -ENOMEM; | |
8c7be95e | 844 | |
dfbacb6f LP |
845 | k = strv_extend(&m, u); |
846 | if (k < 0) | |
847 | return -ENOMEM; | |
848 | } | |
b9893505 | 849 | |
565d91fd MV |
850 | free(c); |
851 | c = NULL; | |
8c7be95e LP |
852 | } |
853 | ||
8c7be95e LP |
854 | *rl = m; |
855 | m = NULL; | |
856 | ||
b9893505 | 857 | return 0; |
8c7be95e LP |
858 | } |
859 | ||
7640a5de | 860 | int write_env_file(const char *fname, char **l) { |
34ca941c | 861 | char **i, *p; |
7640a5de LP |
862 | FILE *f; |
863 | int r; | |
864 | ||
34ca941c LP |
865 | r = fopen_temporary(fname, &f, &p); |
866 | if (r < 0) | |
867 | return r; | |
7640a5de | 868 | |
34ca941c LP |
869 | fchmod_umask(fileno(f), 0644); |
870 | ||
871 | errno = 0; | |
7640a5de LP |
872 | STRV_FOREACH(i, l) { |
873 | fputs(*i, f); | |
874 | fputc('\n', f); | |
875 | } | |
876 | ||
877 | fflush(f); | |
878 | ||
34ca941c LP |
879 | if (ferror(f)) { |
880 | if (errno != 0) | |
881 | r = -errno; | |
882 | else | |
883 | r = -EIO; | |
884 | } else { | |
885 | if (rename(p, fname) < 0) | |
886 | r = -errno; | |
887 | else | |
888 | r = 0; | |
889 | } | |
890 | ||
891 | if (r < 0) | |
892 | unlink(p); | |
893 | ||
7640a5de | 894 | fclose(f); |
34ca941c | 895 | free(p); |
7640a5de LP |
896 | |
897 | return r; | |
898 | } | |
899 | ||
7072ced8 LP |
900 | char *truncate_nl(char *s) { |
901 | assert(s); | |
902 | ||
903 | s[strcspn(s, NEWLINE)] = 0; | |
904 | return s; | |
905 | } | |
906 | ||
87d2c1ff | 907 | int get_process_comm(pid_t pid, char **name) { |
7072ced8 LP |
908 | int r; |
909 | ||
7072ced8 LP |
910 | assert(name); |
911 | ||
87d2c1ff LP |
912 | if (pid == 0) |
913 | r = read_one_line_file("/proc/self/comm", name); | |
914 | else { | |
915 | char *p; | |
916 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) | |
917 | return -ENOMEM; | |
7072ced8 | 918 | |
87d2c1ff LP |
919 | r = read_one_line_file(p, name); |
920 | free(p); | |
921 | } | |
7072ced8 | 922 | |
87d2c1ff | 923 | return r; |
7072ced8 LP |
924 | } |
925 | ||
87d2c1ff | 926 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
9bdbc2e2 | 927 | char *r = NULL, *k; |
c59760ee | 928 | int c; |
c59760ee LP |
929 | FILE *f; |
930 | ||
c59760ee LP |
931 | assert(line); |
932 | ||
87d2c1ff LP |
933 | if (pid == 0) |
934 | f = fopen("/proc/self/cmdline", "re"); | |
935 | else { | |
936 | char *p; | |
937 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
938 | return -ENOMEM; | |
c59760ee | 939 | |
87d2c1ff LP |
940 | f = fopen(p, "re"); |
941 | free(p); | |
942 | } | |
c59760ee LP |
943 | |
944 | if (!f) | |
945 | return -errno; | |
9bdbc2e2 LN |
946 | if (max_length == 0) { |
947 | size_t len = 1; | |
948 | while ((c = getc(f)) != EOF) { | |
949 | k = realloc(r, len+1); | |
950 | if (k == NULL) { | |
951 | free(r); | |
952 | fclose(f); | |
953 | return -ENOMEM; | |
954 | } | |
955 | r = k; | |
956 | r[len-1] = isprint(c) ? c : ' '; | |
957 | r[len] = 0; | |
958 | len++; | |
959 | } | |
960 | } else { | |
961 | bool space = false; | |
962 | size_t left; | |
963 | r = new(char, max_length); | |
964 | if (!r) { | |
965 | fclose(f); | |
966 | return -ENOMEM; | |
967 | } | |
c59760ee | 968 | |
9bdbc2e2 LN |
969 | k = r; |
970 | left = max_length; | |
971 | while ((c = getc(f)) != EOF) { | |
c59760ee | 972 | |
9bdbc2e2 LN |
973 | if (isprint(c)) { |
974 | if (space) { | |
975 | if (left <= 4) | |
976 | break; | |
977 | ||
978 | *(k++) = ' '; | |
979 | left--; | |
980 | space = false; | |
981 | } | |
c59760ee | 982 | |
c59760ee LP |
983 | if (left <= 4) |
984 | break; | |
985 | ||
9bdbc2e2 | 986 | *(k++) = (char) c; |
057fbb58 | 987 | left--; |
9bdbc2e2 LN |
988 | } else |
989 | space = true; | |
990 | } | |
c59760ee | 991 | |
9bdbc2e2 LN |
992 | if (left <= 4) { |
993 | size_t n = MIN(left-1, 3U); | |
994 | memcpy(k, "...", n); | |
995 | k[n] = 0; | |
996 | } else | |
997 | *k = 0; | |
c59760ee LP |
998 | } |
999 | ||
c59760ee LP |
1000 | fclose(f); |
1001 | ||
35d2e7ec | 1002 | /* Kernel threads have no argv[] */ |
9bdbc2e2 | 1003 | if (r == NULL || r[0] == 0) { |
35d2e7ec LP |
1004 | char *t; |
1005 | int h; | |
1006 | ||
1007 | free(r); | |
1008 | ||
87d2c1ff LP |
1009 | if (!comm_fallback) |
1010 | return -ENOENT; | |
1011 | ||
1012 | h = get_process_comm(pid, &t); | |
1013 | if (h < 0) | |
35d2e7ec LP |
1014 | return h; |
1015 | ||
b7def684 | 1016 | r = strjoin("[", t, "]", NULL); |
35d2e7ec LP |
1017 | free(t); |
1018 | ||
87d2c1ff | 1019 | if (!r) |
35d2e7ec LP |
1020 | return -ENOMEM; |
1021 | } | |
fa776d8e | 1022 | |
c59760ee LP |
1023 | *line = r; |
1024 | return 0; | |
1025 | } | |
1026 | ||
1e5678d0 LP |
1027 | int is_kernel_thread(pid_t pid) { |
1028 | char *p; | |
1029 | size_t count; | |
1030 | char c; | |
1031 | bool eof; | |
1032 | FILE *f; | |
1033 | ||
1034 | if (pid == 0) | |
1035 | return 0; | |
1036 | ||
1037 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1038 | return -ENOMEM; | |
1039 | ||
1040 | f = fopen(p, "re"); | |
1041 | free(p); | |
1042 | ||
1043 | if (!f) | |
1044 | return -errno; | |
1045 | ||
1046 | count = fread(&c, 1, 1, f); | |
1047 | eof = feof(f); | |
1048 | fclose(f); | |
1049 | ||
1050 | /* Kernel threads have an empty cmdline */ | |
1051 | ||
1052 | if (count <= 0) | |
1053 | return eof ? 1 : -errno; | |
1054 | ||
1055 | return 0; | |
1056 | } | |
1057 | ||
87d2c1ff LP |
1058 | int get_process_exe(pid_t pid, char **name) { |
1059 | int r; | |
1060 | ||
1061 | assert(name); | |
1062 | ||
1063 | if (pid == 0) | |
1064 | r = readlink_malloc("/proc/self/exe", name); | |
1065 | else { | |
1066 | char *p; | |
1067 | if (asprintf(&p, "/proc/%lu/exe", (unsigned long) pid) < 0) | |
1068 | return -ENOMEM; | |
1069 | ||
1070 | r = readlink_malloc(p, name); | |
1071 | free(p); | |
1072 | } | |
1073 | ||
1074 | return r; | |
1075 | } | |
1076 | ||
901c3d0d | 1077 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
f74e605f LP |
1078 | _cleanup_fclose_ FILE *f = NULL; |
1079 | _cleanup_free_ char *p = NULL; | |
7e4ab3c5 | 1080 | |
f74e605f | 1081 | assert(field); |
7e4ab3c5 LP |
1082 | assert(uid); |
1083 | ||
1084 | if (pid == 0) | |
1085 | return getuid(); | |
1086 | ||
1087 | if (asprintf(&p, "/proc/%lu/status", (unsigned long) pid) < 0) | |
1088 | return -ENOMEM; | |
1089 | ||
1090 | f = fopen(p, "re"); | |
7e4ab3c5 LP |
1091 | if (!f) |
1092 | return -errno; | |
1093 | ||
f74e605f LP |
1094 | FOREACH_LINE(f, line, return -errno) { |
1095 | char *l; | |
7e4ab3c5 LP |
1096 | |
1097 | l = strstrip(line); | |
1098 | ||
901c3d0d LP |
1099 | if (startswith(l, field)) { |
1100 | l += strlen(field); | |
7e4ab3c5 LP |
1101 | l += strspn(l, WHITESPACE); |
1102 | ||
1103 | l[strcspn(l, WHITESPACE)] = 0; | |
1104 | ||
f74e605f | 1105 | return parse_uid(l, uid); |
7e4ab3c5 LP |
1106 | } |
1107 | } | |
1108 | ||
f74e605f | 1109 | return -EIO; |
7e4ab3c5 LP |
1110 | } |
1111 | ||
901c3d0d LP |
1112 | int get_process_uid(pid_t pid, uid_t *uid) { |
1113 | return get_process_id(pid, "Uid:", uid); | |
1114 | } | |
1115 | ||
1116 | int get_process_gid(pid_t pid, gid_t *gid) { | |
1117 | return get_process_id(pid, "Gid:", gid); | |
1118 | } | |
1119 | ||
fab56fc5 LP |
1120 | char *strnappend(const char *s, const char *suffix, size_t b) { |
1121 | size_t a; | |
44d8db9e LP |
1122 | char *r; |
1123 | ||
fab56fc5 LP |
1124 | if (!s && !suffix) |
1125 | return strdup(""); | |
1126 | ||
1127 | if (!s) | |
1128 | return strndup(suffix, b); | |
1129 | ||
1130 | if (!suffix) | |
1131 | return strdup(s); | |
1132 | ||
44d8db9e LP |
1133 | assert(s); |
1134 | assert(suffix); | |
1135 | ||
1136 | a = strlen(s); | |
aa408e77 | 1137 | if (b > ((size_t) -1) - a) |
040f18ea | 1138 | return NULL; |
44d8db9e | 1139 | |
040f18ea LP |
1140 | r = new(char, a+b+1); |
1141 | if (!r) | |
44d8db9e LP |
1142 | return NULL; |
1143 | ||
1144 | memcpy(r, s, a); | |
1145 | memcpy(r+a, suffix, b); | |
1146 | r[a+b] = 0; | |
1147 | ||
1148 | return r; | |
1149 | } | |
87f0e418 | 1150 | |
fab56fc5 LP |
1151 | char *strappend(const char *s, const char *suffix) { |
1152 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
1153 | } | |
1154 | ||
87f0e418 LP |
1155 | int readlink_malloc(const char *p, char **r) { |
1156 | size_t l = 100; | |
1157 | ||
1158 | assert(p); | |
1159 | assert(r); | |
1160 | ||
1161 | for (;;) { | |
1162 | char *c; | |
1163 | ssize_t n; | |
1164 | ||
1165 | if (!(c = new(char, l))) | |
1166 | return -ENOMEM; | |
1167 | ||
1168 | if ((n = readlink(p, c, l-1)) < 0) { | |
1169 | int ret = -errno; | |
1170 | free(c); | |
1171 | return ret; | |
1172 | } | |
1173 | ||
1174 | if ((size_t) n < l-1) { | |
1175 | c[n] = 0; | |
1176 | *r = c; | |
1177 | return 0; | |
1178 | } | |
1179 | ||
1180 | free(c); | |
1181 | l *= 2; | |
1182 | } | |
1183 | } | |
1184 | ||
2c7108c4 LP |
1185 | int readlink_and_make_absolute(const char *p, char **r) { |
1186 | char *target, *k; | |
1187 | int j; | |
1188 | ||
1189 | assert(p); | |
1190 | assert(r); | |
1191 | ||
1192 | if ((j = readlink_malloc(p, &target)) < 0) | |
1193 | return j; | |
1194 | ||
1195 | k = file_in_same_dir(p, target); | |
1196 | free(target); | |
1197 | ||
1198 | if (!k) | |
1199 | return -ENOMEM; | |
1200 | ||
1201 | *r = k; | |
1202 | return 0; | |
1203 | } | |
1204 | ||
83096483 LP |
1205 | int readlink_and_canonicalize(const char *p, char **r) { |
1206 | char *t, *s; | |
1207 | int j; | |
1208 | ||
1209 | assert(p); | |
1210 | assert(r); | |
1211 | ||
1212 | j = readlink_and_make_absolute(p, &t); | |
1213 | if (j < 0) | |
1214 | return j; | |
1215 | ||
1216 | s = canonicalize_file_name(t); | |
1217 | if (s) { | |
1218 | free(t); | |
1219 | *r = s; | |
1220 | } else | |
1221 | *r = t; | |
1222 | ||
1223 | path_kill_slashes(*r); | |
1224 | ||
1225 | return 0; | |
1226 | } | |
1227 | ||
2a987ee8 LP |
1228 | int reset_all_signal_handlers(void) { |
1229 | int sig; | |
1230 | ||
1231 | for (sig = 1; sig < _NSIG; sig++) { | |
1232 | struct sigaction sa; | |
1233 | ||
1234 | if (sig == SIGKILL || sig == SIGSTOP) | |
1235 | continue; | |
1236 | ||
1237 | zero(sa); | |
1238 | sa.sa_handler = SIG_DFL; | |
431c32bf | 1239 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
1240 | |
1241 | /* On Linux the first two RT signals are reserved by | |
1242 | * glibc, and sigaction() will return EINVAL for them. */ | |
1243 | if ((sigaction(sig, &sa, NULL) < 0)) | |
1244 | if (errno != EINVAL) | |
1245 | return -errno; | |
1246 | } | |
1247 | ||
8e274523 | 1248 | return 0; |
2a987ee8 | 1249 | } |
4a72ff34 LP |
1250 | |
1251 | char *strstrip(char *s) { | |
57a8eca8 | 1252 | char *e; |
4a72ff34 LP |
1253 | |
1254 | /* Drops trailing whitespace. Modifies the string in | |
1255 | * place. Returns pointer to first non-space character */ | |
1256 | ||
1257 | s += strspn(s, WHITESPACE); | |
1258 | ||
57a8eca8 LP |
1259 | for (e = strchr(s, 0); e > s; e --) |
1260 | if (!strchr(WHITESPACE, e[-1])) | |
1261 | break; | |
4a72ff34 | 1262 | |
57a8eca8 | 1263 | *e = 0; |
4a72ff34 LP |
1264 | |
1265 | return s; | |
4a72ff34 LP |
1266 | } |
1267 | ||
ee9b5e01 LP |
1268 | char *delete_chars(char *s, const char *bad) { |
1269 | char *f, *t; | |
1270 | ||
1271 | /* Drops all whitespace, regardless where in the string */ | |
1272 | ||
1273 | for (f = s, t = s; *f; f++) { | |
1274 | if (strchr(bad, *f)) | |
1275 | continue; | |
1276 | ||
1277 | *(t++) = *f; | |
1278 | } | |
1279 | ||
1280 | *t = 0; | |
1281 | ||
1282 | return s; | |
1283 | } | |
1284 | ||
ab1f0633 LP |
1285 | bool in_charset(const char *s, const char* charset) { |
1286 | const char *i; | |
1287 | ||
1288 | assert(s); | |
1289 | assert(charset); | |
1290 | ||
1291 | for (i = s; *i; i++) | |
1292 | if (!strchr(charset, *i)) | |
1293 | return false; | |
1294 | ||
1295 | return true; | |
1296 | } | |
1297 | ||
4a72ff34 LP |
1298 | char *file_in_same_dir(const char *path, const char *filename) { |
1299 | char *e, *r; | |
1300 | size_t k; | |
1301 | ||
1302 | assert(path); | |
1303 | assert(filename); | |
1304 | ||
1305 | /* This removes the last component of path and appends | |
1306 | * filename, unless the latter is absolute anyway or the | |
1307 | * former isn't */ | |
1308 | ||
1309 | if (path_is_absolute(filename)) | |
1310 | return strdup(filename); | |
1311 | ||
1312 | if (!(e = strrchr(path, '/'))) | |
1313 | return strdup(filename); | |
1314 | ||
1315 | k = strlen(filename); | |
1316 | if (!(r = new(char, e-path+1+k+1))) | |
1317 | return NULL; | |
1318 | ||
1319 | memcpy(r, path, e-path+1); | |
1320 | memcpy(r+(e-path)+1, filename, k+1); | |
1321 | ||
1322 | return r; | |
1323 | } | |
fb624d04 | 1324 | |
c32dd69b LP |
1325 | int rmdir_parents(const char *path, const char *stop) { |
1326 | size_t l; | |
1327 | int r = 0; | |
1328 | ||
1329 | assert(path); | |
1330 | assert(stop); | |
1331 | ||
1332 | l = strlen(path); | |
1333 | ||
1334 | /* Skip trailing slashes */ | |
1335 | while (l > 0 && path[l-1] == '/') | |
1336 | l--; | |
1337 | ||
1338 | while (l > 0) { | |
1339 | char *t; | |
1340 | ||
1341 | /* Skip last component */ | |
1342 | while (l > 0 && path[l-1] != '/') | |
1343 | l--; | |
1344 | ||
1345 | /* Skip trailing slashes */ | |
1346 | while (l > 0 && path[l-1] == '/') | |
1347 | l--; | |
1348 | ||
1349 | if (l <= 0) | |
1350 | break; | |
1351 | ||
1352 | if (!(t = strndup(path, l))) | |
1353 | return -ENOMEM; | |
1354 | ||
1355 | if (path_startswith(stop, t)) { | |
1356 | free(t); | |
1357 | return 0; | |
1358 | } | |
1359 | ||
1360 | r = rmdir(t); | |
1361 | free(t); | |
1362 | ||
1363 | if (r < 0) | |
1364 | if (errno != ENOENT) | |
1365 | return -errno; | |
1366 | } | |
1367 | ||
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | ||
fb624d04 LP |
1372 | char hexchar(int x) { |
1373 | static const char table[16] = "0123456789abcdef"; | |
1374 | ||
1375 | return table[x & 15]; | |
1376 | } | |
4fe88d28 LP |
1377 | |
1378 | int unhexchar(char c) { | |
1379 | ||
1380 | if (c >= '0' && c <= '9') | |
1381 | return c - '0'; | |
1382 | ||
1383 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1384 | return c - 'a' + 10; |
4fe88d28 LP |
1385 | |
1386 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1387 | return c - 'A' + 10; |
4fe88d28 LP |
1388 | |
1389 | return -1; | |
1390 | } | |
1391 | ||
1392 | char octchar(int x) { | |
1393 | return '0' + (x & 7); | |
1394 | } | |
1395 | ||
1396 | int unoctchar(char c) { | |
1397 | ||
1398 | if (c >= '0' && c <= '7') | |
1399 | return c - '0'; | |
1400 | ||
1401 | return -1; | |
1402 | } | |
1403 | ||
5af98f82 LP |
1404 | char decchar(int x) { |
1405 | return '0' + (x % 10); | |
1406 | } | |
1407 | ||
1408 | int undecchar(char c) { | |
1409 | ||
1410 | if (c >= '0' && c <= '9') | |
1411 | return c - '0'; | |
1412 | ||
1413 | return -1; | |
1414 | } | |
1415 | ||
4fe88d28 LP |
1416 | char *cescape(const char *s) { |
1417 | char *r, *t; | |
1418 | const char *f; | |
1419 | ||
1420 | assert(s); | |
1421 | ||
1422 | /* Does C style string escaping. */ | |
1423 | ||
f8e2fb7b LP |
1424 | r = new(char, strlen(s)*4 + 1); |
1425 | if (!r) | |
4fe88d28 LP |
1426 | return NULL; |
1427 | ||
1428 | for (f = s, t = r; *f; f++) | |
1429 | ||
1430 | switch (*f) { | |
1431 | ||
1432 | case '\a': | |
1433 | *(t++) = '\\'; | |
1434 | *(t++) = 'a'; | |
1435 | break; | |
1436 | case '\b': | |
1437 | *(t++) = '\\'; | |
1438 | *(t++) = 'b'; | |
1439 | break; | |
1440 | case '\f': | |
1441 | *(t++) = '\\'; | |
1442 | *(t++) = 'f'; | |
1443 | break; | |
1444 | case '\n': | |
1445 | *(t++) = '\\'; | |
1446 | *(t++) = 'n'; | |
1447 | break; | |
1448 | case '\r': | |
1449 | *(t++) = '\\'; | |
1450 | *(t++) = 'r'; | |
1451 | break; | |
1452 | case '\t': | |
1453 | *(t++) = '\\'; | |
1454 | *(t++) = 't'; | |
1455 | break; | |
1456 | case '\v': | |
1457 | *(t++) = '\\'; | |
1458 | *(t++) = 'v'; | |
1459 | break; | |
1460 | case '\\': | |
1461 | *(t++) = '\\'; | |
1462 | *(t++) = '\\'; | |
1463 | break; | |
1464 | case '"': | |
1465 | *(t++) = '\\'; | |
1466 | *(t++) = '"'; | |
1467 | break; | |
1468 | case '\'': | |
1469 | *(t++) = '\\'; | |
1470 | *(t++) = '\''; | |
1471 | break; | |
1472 | ||
1473 | default: | |
1474 | /* For special chars we prefer octal over | |
1475 | * hexadecimal encoding, simply because glib's | |
1476 | * g_strescape() does the same */ | |
1477 | if ((*f < ' ') || (*f >= 127)) { | |
1478 | *(t++) = '\\'; | |
1479 | *(t++) = octchar((unsigned char) *f >> 6); | |
1480 | *(t++) = octchar((unsigned char) *f >> 3); | |
1481 | *(t++) = octchar((unsigned char) *f); | |
1482 | } else | |
1483 | *(t++) = *f; | |
1484 | break; | |
1485 | } | |
1486 | ||
1487 | *t = 0; | |
1488 | ||
1489 | return r; | |
1490 | } | |
1491 | ||
5b4c61cd | 1492 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1493 | char *r, *t; |
1494 | const char *f; | |
5b4c61cd | 1495 | size_t pl; |
4fe88d28 LP |
1496 | |
1497 | assert(s); | |
1498 | ||
5b4c61cd LP |
1499 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1500 | ||
1501 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1502 | |
5b4c61cd | 1503 | r = new(char, pl+length+1); |
7f110ff9 | 1504 | if (!r) |
4fe88d28 LP |
1505 | return r; |
1506 | ||
5b4c61cd LP |
1507 | if (prefix) |
1508 | memcpy(r, prefix, pl); | |
1509 | ||
1510 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1511 | |
1512 | if (*f != '\\') { | |
1513 | *(t++) = *f; | |
1514 | continue; | |
1515 | } | |
1516 | ||
1517 | f++; | |
1518 | ||
1519 | switch (*f) { | |
1520 | ||
1521 | case 'a': | |
1522 | *(t++) = '\a'; | |
1523 | break; | |
1524 | case 'b': | |
1525 | *(t++) = '\b'; | |
1526 | break; | |
1527 | case 'f': | |
1528 | *(t++) = '\f'; | |
1529 | break; | |
1530 | case 'n': | |
1531 | *(t++) = '\n'; | |
1532 | break; | |
1533 | case 'r': | |
1534 | *(t++) = '\r'; | |
1535 | break; | |
1536 | case 't': | |
1537 | *(t++) = '\t'; | |
1538 | break; | |
1539 | case 'v': | |
1540 | *(t++) = '\v'; | |
1541 | break; | |
1542 | case '\\': | |
1543 | *(t++) = '\\'; | |
1544 | break; | |
1545 | case '"': | |
1546 | *(t++) = '"'; | |
1547 | break; | |
1548 | case '\'': | |
1549 | *(t++) = '\''; | |
1550 | break; | |
1551 | ||
e167fb86 LP |
1552 | case 's': |
1553 | /* This is an extension of the XDG syntax files */ | |
1554 | *(t++) = ' '; | |
1555 | break; | |
1556 | ||
4fe88d28 LP |
1557 | case 'x': { |
1558 | /* hexadecimal encoding */ | |
1559 | int a, b; | |
1560 | ||
7f110ff9 LP |
1561 | a = unhexchar(f[1]); |
1562 | b = unhexchar(f[2]); | |
1563 | ||
1564 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1565 | /* Invalid escape code, let's take it literal then */ |
1566 | *(t++) = '\\'; | |
1567 | *(t++) = 'x'; | |
1568 | } else { | |
1569 | *(t++) = (char) ((a << 4) | b); | |
1570 | f += 2; | |
1571 | } | |
1572 | ||
1573 | break; | |
1574 | } | |
1575 | ||
1576 | case '0': | |
1577 | case '1': | |
1578 | case '2': | |
1579 | case '3': | |
1580 | case '4': | |
1581 | case '5': | |
1582 | case '6': | |
1583 | case '7': { | |
1584 | /* octal encoding */ | |
1585 | int a, b, c; | |
1586 | ||
7f110ff9 LP |
1587 | a = unoctchar(f[0]); |
1588 | b = unoctchar(f[1]); | |
1589 | c = unoctchar(f[2]); | |
1590 | ||
1591 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1592 | /* Invalid escape code, let's take it literal then */ |
1593 | *(t++) = '\\'; | |
1594 | *(t++) = f[0]; | |
1595 | } else { | |
1596 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1597 | f += 2; | |
1598 | } | |
1599 | ||
1600 | break; | |
1601 | } | |
1602 | ||
1603 | case 0: | |
1604 | /* premature end of string.*/ | |
1605 | *(t++) = '\\'; | |
1606 | goto finish; | |
1607 | ||
1608 | default: | |
1609 | /* Invalid escape code, let's take it literal then */ | |
1610 | *(t++) = '\\'; | |
f3d4cc01 | 1611 | *(t++) = *f; |
4fe88d28 LP |
1612 | break; |
1613 | } | |
1614 | } | |
1615 | ||
1616 | finish: | |
1617 | *t = 0; | |
1618 | return r; | |
1619 | } | |
1620 | ||
5b4c61cd LP |
1621 | char *cunescape_length(const char *s, size_t length) { |
1622 | return cunescape_length_with_prefix(s, length, NULL); | |
1623 | } | |
1624 | ||
6febfd0d | 1625 | char *cunescape(const char *s) { |
5b4c61cd LP |
1626 | assert(s); |
1627 | ||
6febfd0d LP |
1628 | return cunescape_length(s, strlen(s)); |
1629 | } | |
4fe88d28 LP |
1630 | |
1631 | char *xescape(const char *s, const char *bad) { | |
1632 | char *r, *t; | |
1633 | const char *f; | |
1634 | ||
1635 | /* Escapes all chars in bad, in addition to \ and all special | |
1636 | * chars, in \xFF style escaping. May be reversed with | |
1637 | * cunescape. */ | |
1638 | ||
08ace05b LP |
1639 | r = new(char, strlen(s) * 4 + 1); |
1640 | if (!r) | |
4fe88d28 LP |
1641 | return NULL; |
1642 | ||
1643 | for (f = s, t = r; *f; f++) { | |
1644 | ||
b866264a LP |
1645 | if ((*f < ' ') || (*f >= 127) || |
1646 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1647 | *(t++) = '\\'; |
1648 | *(t++) = 'x'; | |
1649 | *(t++) = hexchar(*f >> 4); | |
1650 | *(t++) = hexchar(*f); | |
1651 | } else | |
1652 | *(t++) = *f; | |
1653 | } | |
1654 | ||
1655 | *t = 0; | |
1656 | ||
1657 | return r; | |
1658 | } | |
1659 | ||
ea430986 | 1660 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1661 | char *r, *t; |
1662 | const char *f; | |
1663 | ||
47be870b LP |
1664 | assert(s); |
1665 | ||
ea430986 LP |
1666 | /* Escapes all chars that D-Bus' object path cannot deal |
1667 | * with. Can be reverse with bus_path_unescape() */ | |
1668 | ||
1669 | if (!(r = new(char, strlen(s)*3+1))) | |
1670 | return NULL; | |
1671 | ||
1672 | for (f = s, t = r; *f; f++) { | |
1673 | ||
1674 | if (!(*f >= 'A' && *f <= 'Z') && | |
1675 | !(*f >= 'a' && *f <= 'z') && | |
1676 | !(*f >= '0' && *f <= '9')) { | |
1677 | *(t++) = '_'; | |
1678 | *(t++) = hexchar(*f >> 4); | |
1679 | *(t++) = hexchar(*f); | |
1680 | } else | |
1681 | *(t++) = *f; | |
1682 | } | |
1683 | ||
1684 | *t = 0; | |
1685 | ||
1686 | return r; | |
1687 | } | |
1688 | ||
9e2f7c11 | 1689 | char *bus_path_unescape(const char *f) { |
ea430986 | 1690 | char *r, *t; |
ea430986 | 1691 | |
9e2f7c11 | 1692 | assert(f); |
47be870b | 1693 | |
9e2f7c11 | 1694 | if (!(r = strdup(f))) |
ea430986 LP |
1695 | return NULL; |
1696 | ||
9e2f7c11 | 1697 | for (t = r; *f; f++) { |
ea430986 LP |
1698 | |
1699 | if (*f == '_') { | |
1700 | int a, b; | |
1701 | ||
1702 | if ((a = unhexchar(f[1])) < 0 || | |
1703 | (b = unhexchar(f[2])) < 0) { | |
1704 | /* Invalid escape code, let's take it literal then */ | |
1705 | *(t++) = '_'; | |
1706 | } else { | |
1707 | *(t++) = (char) ((a << 4) | b); | |
1708 | f += 2; | |
1709 | } | |
1710 | } else | |
1711 | *(t++) = *f; | |
1712 | } | |
1713 | ||
1714 | *t = 0; | |
1715 | ||
1716 | return r; | |
1717 | } | |
1718 | ||
67d51650 | 1719 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1720 | char *p; |
1721 | ||
67d51650 | 1722 | assert(t); |
4fe88d28 | 1723 | |
67d51650 | 1724 | for (p = t; *p; p++) |
4fe88d28 LP |
1725 | if (*p >= 'A' && *p <= 'Z') |
1726 | *p = *p - 'A' + 'a'; | |
1727 | ||
67d51650 | 1728 | return t; |
4fe88d28 | 1729 | } |
1dccbe19 | 1730 | |
a228a22f | 1731 | static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1732 | assert(filename); |
1733 | ||
1734 | return | |
1735 | filename[0] == '.' || | |
6c78be3c | 1736 | streq(filename, "lost+found") || |
e472d476 LP |
1737 | streq(filename, "aquota.user") || |
1738 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1739 | endswith(filename, ".rpmnew") || |
1740 | endswith(filename, ".rpmsave") || | |
1741 | endswith(filename, ".rpmorig") || | |
1742 | endswith(filename, ".dpkg-old") || | |
1743 | endswith(filename, ".dpkg-new") || | |
1744 | endswith(filename, ".swp"); | |
1745 | } | |
1746 | ||
a228a22f LP |
1747 | bool ignore_file(const char *filename) { |
1748 | assert(filename); | |
1749 | ||
1750 | if (endswith(filename, "~")) | |
1751 | return false; | |
1752 | ||
1753 | return ignore_file_allow_backup(filename); | |
1754 | } | |
1755 | ||
3a0ecb08 LP |
1756 | int fd_nonblock(int fd, bool nonblock) { |
1757 | int flags; | |
1758 | ||
1759 | assert(fd >= 0); | |
1760 | ||
1761 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1762 | return -errno; | |
1763 | ||
1764 | if (nonblock) | |
1765 | flags |= O_NONBLOCK; | |
1766 | else | |
1767 | flags &= ~O_NONBLOCK; | |
1768 | ||
1769 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1770 | return -errno; | |
1771 | ||
1772 | return 0; | |
1773 | } | |
1774 | ||
1775 | int fd_cloexec(int fd, bool cloexec) { | |
1776 | int flags; | |
1777 | ||
1778 | assert(fd >= 0); | |
1779 | ||
1780 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1781 | return -errno; | |
1782 | ||
1783 | if (cloexec) | |
1784 | flags |= FD_CLOEXEC; | |
1785 | else | |
1786 | flags &= ~FD_CLOEXEC; | |
1787 | ||
1788 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1789 | return -errno; | |
1790 | ||
1791 | return 0; | |
1792 | } | |
1793 | ||
b19be9eb LP |
1794 | static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
1795 | unsigned i; | |
1796 | ||
1797 | assert(n_fdset == 0 || fdset); | |
1798 | ||
1799 | for (i = 0; i < n_fdset; i++) | |
1800 | if (fdset[i] == fd) | |
1801 | return true; | |
1802 | ||
1803 | return false; | |
1804 | } | |
1805 | ||
a0d40ac5 LP |
1806 | int close_all_fds(const int except[], unsigned n_except) { |
1807 | DIR *d; | |
1808 | struct dirent *de; | |
1809 | int r = 0; | |
1810 | ||
b19be9eb LP |
1811 | assert(n_except == 0 || except); |
1812 | ||
1813 | d = opendir("/proc/self/fd"); | |
1814 | if (!d) { | |
1815 | int fd; | |
1816 | struct rlimit rl; | |
1817 | ||
1818 | /* When /proc isn't available (for example in chroots) | |
1819 | * the fallback is brute forcing through the fd | |
1820 | * table */ | |
1821 | ||
1822 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1823 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1824 | ||
1825 | if (fd_in_set(fd, except, n_except)) | |
1826 | continue; | |
1827 | ||
1828 | if (close_nointr(fd) < 0) | |
1829 | if (errno != EBADF && r == 0) | |
1830 | r = -errno; | |
1831 | } | |
1832 | ||
1833 | return r; | |
1834 | } | |
a0d40ac5 LP |
1835 | |
1836 | while ((de = readdir(d))) { | |
a7610064 | 1837 | int fd = -1; |
a0d40ac5 | 1838 | |
a16e1123 | 1839 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1840 | continue; |
1841 | ||
720ce21d LP |
1842 | if (safe_atoi(de->d_name, &fd) < 0) |
1843 | /* Let's better ignore this, just in case */ | |
1844 | continue; | |
a0d40ac5 LP |
1845 | |
1846 | if (fd < 3) | |
1847 | continue; | |
1848 | ||
1849 | if (fd == dirfd(d)) | |
1850 | continue; | |
1851 | ||
b19be9eb LP |
1852 | if (fd_in_set(fd, except, n_except)) |
1853 | continue; | |
a0d40ac5 | 1854 | |
720ce21d | 1855 | if (close_nointr(fd) < 0) { |
2f357920 | 1856 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1857 | if (errno != EBADF && r == 0) |
1858 | r = -errno; | |
2f357920 | 1859 | } |
a0d40ac5 LP |
1860 | } |
1861 | ||
a0d40ac5 LP |
1862 | closedir(d); |
1863 | return r; | |
1864 | } | |
1865 | ||
db12775d LP |
1866 | bool chars_intersect(const char *a, const char *b) { |
1867 | const char *p; | |
1868 | ||
1869 | /* Returns true if any of the chars in a are in b. */ | |
1870 | for (p = a; *p; p++) | |
1871 | if (strchr(b, *p)) | |
1872 | return true; | |
1873 | ||
1874 | return false; | |
1875 | } | |
1876 | ||
42856c10 | 1877 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
1878 | static const char table[] = |
1879 | "cifs\0" | |
1880 | "smbfs\0" | |
1881 | "ncpfs\0" | |
1882 | "nfs\0" | |
1883 | "nfs4\0" | |
1884 | "gfs\0" | |
73836c5c | 1885 | "gfs2\0"; |
42856c10 | 1886 | |
a05f97b3 | 1887 | return nulstr_contains(table, fstype); |
42856c10 LP |
1888 | } |
1889 | ||
601f6a1e | 1890 | int chvt(int vt) { |
a05f97b3 | 1891 | _cleanup_close_ int fd; |
601f6a1e | 1892 | |
a05f97b3 LP |
1893 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1894 | if (fd < 0) | |
601f6a1e LP |
1895 | return -errno; |
1896 | ||
1897 | if (vt < 0) { | |
1898 | int tiocl[2] = { | |
1899 | TIOCL_GETKMSGREDIRECT, | |
1900 | 0 | |
1901 | }; | |
1902 | ||
a05f97b3 LP |
1903 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1904 | return -errno; | |
601f6a1e LP |
1905 | |
1906 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1907 | } | |
1908 | ||
1909 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1910 | return -errno; |
601f6a1e | 1911 | |
a05f97b3 | 1912 | return 0; |
601f6a1e LP |
1913 | } |
1914 | ||
8f2d43a0 | 1915 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
1916 | struct termios old_termios, new_termios; |
1917 | char c; | |
20c03b7b | 1918 | char line[LINE_MAX]; |
80876c20 LP |
1919 | |
1920 | assert(f); | |
1921 | assert(ret); | |
1922 | ||
1923 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1924 | new_termios = old_termios; | |
1925 | ||
1926 | new_termios.c_lflag &= ~ICANON; | |
1927 | new_termios.c_cc[VMIN] = 1; | |
1928 | new_termios.c_cc[VTIME] = 0; | |
1929 | ||
1930 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1931 | size_t k; | |
1932 | ||
8f2d43a0 LP |
1933 | if (t != (usec_t) -1) { |
1934 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
1935 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1936 | return -ETIMEDOUT; | |
1937 | } | |
1938 | } | |
1939 | ||
80876c20 LP |
1940 | k = fread(&c, 1, 1, f); |
1941 | ||
1942 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1943 | ||
1944 | if (k <= 0) | |
1945 | return -EIO; | |
1946 | ||
1947 | if (need_nl) | |
1948 | *need_nl = c != '\n'; | |
1949 | ||
1950 | *ret = c; | |
1951 | return 0; | |
1952 | } | |
1953 | } | |
1954 | ||
8f2d43a0 LP |
1955 | if (t != (usec_t) -1) |
1956 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
1957 | return -ETIMEDOUT; | |
1958 | ||
1959 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
1960 | return -EIO; |
1961 | ||
1962 | truncate_nl(line); | |
1963 | ||
1964 | if (strlen(line) != 1) | |
1965 | return -EBADMSG; | |
1966 | ||
1967 | if (need_nl) | |
1968 | *need_nl = false; | |
1969 | ||
1970 | *ret = line[0]; | |
1971 | return 0; | |
1972 | } | |
1973 | ||
1974 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 | 1975 | |
80876c20 LP |
1976 | assert(ret); |
1977 | assert(replies); | |
1978 | assert(text); | |
1979 | ||
1980 | for (;;) { | |
1981 | va_list ap; | |
1982 | char c; | |
1983 | int r; | |
1984 | bool need_nl = true; | |
1985 | ||
8481248b | 1986 | if (on_tty()) |
c1072ea0 | 1987 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1988 | |
80876c20 LP |
1989 | va_start(ap, text); |
1990 | vprintf(text, ap); | |
1991 | va_end(ap); | |
1992 | ||
8481248b | 1993 | if (on_tty()) |
c1072ea0 | 1994 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1995 | |
80876c20 LP |
1996 | fflush(stdout); |
1997 | ||
8f2d43a0 LP |
1998 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
1999 | if (r < 0) { | |
80876c20 LP |
2000 | |
2001 | if (r == -EBADMSG) { | |
2002 | puts("Bad input, please try again."); | |
2003 | continue; | |
2004 | } | |
2005 | ||
2006 | putchar('\n'); | |
2007 | return r; | |
2008 | } | |
2009 | ||
2010 | if (need_nl) | |
2011 | putchar('\n'); | |
2012 | ||
2013 | if (strchr(replies, c)) { | |
2014 | *ret = c; | |
2015 | return 0; | |
2016 | } | |
2017 | ||
2018 | puts("Read unexpected character, please try again."); | |
2019 | } | |
2020 | } | |
2021 | ||
512947d4 | 2022 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
2023 | struct termios termios; |
2024 | int r = 0; | |
3fe5e5d4 LP |
2025 | |
2026 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
2027 | |
2028 | assert(fd >= 0); | |
2029 | ||
eed1d0e3 LP |
2030 | /* We leave locked terminal attributes untouched, so that |
2031 | * Plymouth may set whatever it wants to set, and we don't | |
2032 | * interfere with that. */ | |
3fe5e5d4 LP |
2033 | |
2034 | /* Disable exclusive mode, just in case */ | |
2035 | ioctl(fd, TIOCNXCL); | |
2036 | ||
5c0100a5 | 2037 | /* Switch to text mode */ |
512947d4 MS |
2038 | if (switch_to_text) |
2039 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 2040 | |
3fe5e5d4 | 2041 | /* Enable console unicode mode */ |
df465b3f | 2042 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
2043 | |
2044 | if (tcgetattr(fd, &termios) < 0) { | |
2045 | r = -errno; | |
2046 | goto finish; | |
2047 | } | |
2048 | ||
aaf694ca LP |
2049 | /* We only reset the stuff that matters to the software. How |
2050 | * hardware is set up we don't touch assuming that somebody | |
2051 | * else will do that for us */ | |
2052 | ||
2053 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
2054 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
2055 | termios.c_oflag |= ONLCR; | |
2056 | termios.c_cflag |= CREAD; | |
2057 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
2058 | ||
2059 | termios.c_cc[VINTR] = 03; /* ^C */ | |
2060 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
2061 | termios.c_cc[VERASE] = 0177; | |
2062 | termios.c_cc[VKILL] = 025; /* ^X */ | |
2063 | termios.c_cc[VEOF] = 04; /* ^D */ | |
2064 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
2065 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
2066 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
2067 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
2068 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
2069 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
2070 | termios.c_cc[VEOL] = 0; |
2071 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
2072 | |
2073 | termios.c_cc[VTIME] = 0; | |
2074 | termios.c_cc[VMIN] = 1; | |
2075 | ||
2076 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
2077 | r = -errno; | |
2078 | ||
2079 | finish: | |
2080 | /* Just in case, flush all crap out */ | |
2081 | tcflush(fd, TCIOFLUSH); | |
2082 | ||
2083 | return r; | |
2084 | } | |
2085 | ||
6ea832a2 LP |
2086 | int reset_terminal(const char *name) { |
2087 | int fd, r; | |
2088 | ||
2089 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
2090 | if (fd < 0) | |
2091 | return fd; | |
2092 | ||
512947d4 | 2093 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
2094 | close_nointr_nofail(fd); |
2095 | ||
2096 | return r; | |
2097 | } | |
2098 | ||
80876c20 LP |
2099 | int open_terminal(const char *name, int mode) { |
2100 | int fd, r; | |
f73f76ac | 2101 | unsigned c = 0; |
80876c20 | 2102 | |
f73f76ac LP |
2103 | /* |
2104 | * If a TTY is in the process of being closed opening it might | |
2105 | * cause EIO. This is horribly awful, but unlikely to be | |
2106 | * changed in the kernel. Hence we work around this problem by | |
2107 | * retrying a couple of times. | |
2108 | * | |
2109 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
2110 | */ | |
2111 | ||
2112 | for (;;) { | |
af6da548 LP |
2113 | fd = open(name, mode); |
2114 | if (fd >= 0) | |
f73f76ac LP |
2115 | break; |
2116 | ||
2117 | if (errno != EIO) | |
2118 | return -errno; | |
2119 | ||
af6da548 | 2120 | /* Max 1s in total */ |
f73f76ac LP |
2121 | if (c >= 20) |
2122 | return -errno; | |
2123 | ||
2124 | usleep(50 * USEC_PER_MSEC); | |
2125 | c++; | |
2126 | } | |
2127 | ||
2128 | if (fd < 0) | |
80876c20 LP |
2129 | return -errno; |
2130 | ||
af6da548 LP |
2131 | r = isatty(fd); |
2132 | if (r < 0) { | |
80876c20 LP |
2133 | close_nointr_nofail(fd); |
2134 | return -errno; | |
2135 | } | |
2136 | ||
2137 | if (!r) { | |
2138 | close_nointr_nofail(fd); | |
2139 | return -ENOTTY; | |
2140 | } | |
2141 | ||
2142 | return fd; | |
2143 | } | |
2144 | ||
2145 | int flush_fd(int fd) { | |
2146 | struct pollfd pollfd; | |
2147 | ||
2148 | zero(pollfd); | |
2149 | pollfd.fd = fd; | |
2150 | pollfd.events = POLLIN; | |
2151 | ||
2152 | for (;;) { | |
20c03b7b | 2153 | char buf[LINE_MAX]; |
80876c20 LP |
2154 | ssize_t l; |
2155 | int r; | |
2156 | ||
2157 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2158 | ||
2159 | if (errno == EINTR) | |
2160 | continue; | |
2161 | ||
2162 | return -errno; | |
2163 | } | |
2164 | ||
2165 | if (r == 0) | |
2166 | return 0; | |
2167 | ||
2168 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2169 | ||
2170 | if (errno == EINTR) | |
2171 | continue; | |
2172 | ||
2173 | if (errno == EAGAIN) | |
2174 | return 0; | |
2175 | ||
2176 | return -errno; | |
2177 | } | |
2178 | ||
2179 | if (l <= 0) | |
2180 | return 0; | |
2181 | } | |
2182 | } | |
2183 | ||
af6da548 LP |
2184 | int acquire_terminal( |
2185 | const char *name, | |
2186 | bool fail, | |
2187 | bool force, | |
2188 | bool ignore_tiocstty_eperm, | |
2189 | usec_t timeout) { | |
2190 | ||
4a0ff478 | 2191 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 2192 | usec_t ts = 0; |
32c4bef8 | 2193 | struct sigaction sa_old, sa_new; |
80876c20 LP |
2194 | |
2195 | assert(name); | |
2196 | ||
2197 | /* We use inotify to be notified when the tty is closed. We | |
2198 | * create the watch before checking if we can actually acquire | |
2199 | * it, so that we don't lose any event. | |
2200 | * | |
2201 | * Note: strictly speaking this actually watches for the | |
2202 | * device being closed, it does *not* really watch whether a | |
2203 | * tty loses its controlling process. However, unless some | |
2204 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2205 | * its tty otherwise this will not become a problem. As long | |
2206 | * as the administrator makes sure not configure any service | |
2207 | * on the same tty as an untrusted user this should not be a | |
2208 | * problem. (Which he probably should not do anyway.) */ | |
2209 | ||
af6da548 LP |
2210 | if (timeout != (usec_t) -1) |
2211 | ts = now(CLOCK_MONOTONIC); | |
2212 | ||
80876c20 | 2213 | if (!fail && !force) { |
af6da548 LP |
2214 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
2215 | if (notify < 0) { | |
80876c20 LP |
2216 | r = -errno; |
2217 | goto fail; | |
2218 | } | |
2219 | ||
af6da548 LP |
2220 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
2221 | if (wd < 0) { | |
80876c20 LP |
2222 | r = -errno; |
2223 | goto fail; | |
2224 | } | |
2225 | } | |
2226 | ||
2227 | for (;;) { | |
af6da548 LP |
2228 | if (notify >= 0) { |
2229 | r = flush_fd(notify); | |
2230 | if (r < 0) | |
e3d1855b | 2231 | goto fail; |
af6da548 | 2232 | } |
80876c20 LP |
2233 | |
2234 | /* We pass here O_NOCTTY only so that we can check the return | |
2235 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2236 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
2237 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
2238 | if (fd < 0) | |
6ea832a2 | 2239 | return fd; |
80876c20 | 2240 | |
32c4bef8 LP |
2241 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2242 | * if we already own the tty. */ | |
2243 | zero(sa_new); | |
2244 | sa_new.sa_handler = SIG_IGN; | |
2245 | sa_new.sa_flags = SA_RESTART; | |
2246 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2247 | ||
80876c20 | 2248 | /* First, try to get the tty */ |
32c4bef8 LP |
2249 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
2250 | r = -errno; | |
2251 | ||
2252 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
2253 | |
2254 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2255 | * returning EPERM, i.e. when very likely we already | |
2256 | * are have this controlling terminal. */ | |
32c4bef8 | 2257 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
2258 | r = 0; |
2259 | ||
32c4bef8 | 2260 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
2261 | goto fail; |
2262 | } | |
2263 | ||
2264 | if (r >= 0) | |
2265 | break; | |
2266 | ||
2267 | assert(!fail); | |
2268 | assert(!force); | |
2269 | assert(notify >= 0); | |
2270 | ||
2271 | for (;;) { | |
f601daa7 | 2272 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 2273 | ssize_t l; |
f601daa7 | 2274 | struct inotify_event *e; |
80876c20 | 2275 | |
af6da548 LP |
2276 | if (timeout != (usec_t) -1) { |
2277 | usec_t n; | |
2278 | ||
2279 | n = now(CLOCK_MONOTONIC); | |
2280 | if (ts + timeout < n) { | |
2281 | r = -ETIMEDOUT; | |
2282 | goto fail; | |
2283 | } | |
2284 | ||
2285 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
2286 | if (r < 0) | |
2287 | goto fail; | |
2288 | ||
2289 | if (r == 0) { | |
2290 | r = -ETIMEDOUT; | |
2291 | goto fail; | |
2292 | } | |
2293 | } | |
2294 | ||
2295 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
2296 | if (l < 0) { | |
80876c20 | 2297 | |
af6da548 | 2298 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
2299 | continue; |
2300 | ||
2301 | r = -errno; | |
2302 | goto fail; | |
2303 | } | |
2304 | ||
2305 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2306 | |
f601daa7 LP |
2307 | while (l > 0) { |
2308 | size_t step; | |
80876c20 | 2309 | |
f601daa7 | 2310 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2311 | r = -EIO; |
f601daa7 LP |
2312 | goto fail; |
2313 | } | |
80876c20 | 2314 | |
f601daa7 LP |
2315 | step = sizeof(struct inotify_event) + e->len; |
2316 | assert(step <= (size_t) l); | |
80876c20 | 2317 | |
f601daa7 LP |
2318 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2319 | l -= step; | |
80876c20 LP |
2320 | } |
2321 | ||
2322 | break; | |
2323 | } | |
2324 | ||
2325 | /* We close the tty fd here since if the old session | |
2326 | * ended our handle will be dead. It's important that | |
2327 | * we do this after sleeping, so that we don't enter | |
2328 | * an endless loop. */ | |
2329 | close_nointr_nofail(fd); | |
2330 | } | |
2331 | ||
2332 | if (notify >= 0) | |
a16e1123 | 2333 | close_nointr_nofail(notify); |
80876c20 | 2334 | |
512947d4 MS |
2335 | r = reset_terminal_fd(fd, true); |
2336 | if (r < 0) | |
80876c20 LP |
2337 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2338 | ||
2339 | return fd; | |
2340 | ||
2341 | fail: | |
2342 | if (fd >= 0) | |
a16e1123 | 2343 | close_nointr_nofail(fd); |
80876c20 LP |
2344 | |
2345 | if (notify >= 0) | |
a16e1123 | 2346 | close_nointr_nofail(notify); |
80876c20 LP |
2347 | |
2348 | return r; | |
2349 | } | |
2350 | ||
2351 | int release_terminal(void) { | |
2352 | int r = 0, fd; | |
57cd2192 | 2353 | struct sigaction sa_old, sa_new; |
80876c20 | 2354 | |
ccaa6149 | 2355 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0) |
80876c20 LP |
2356 | return -errno; |
2357 | ||
57cd2192 LP |
2358 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2359 | * by our own TIOCNOTTY */ | |
2360 | ||
2361 | zero(sa_new); | |
2362 | sa_new.sa_handler = SIG_IGN; | |
2363 | sa_new.sa_flags = SA_RESTART; | |
2364 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2365 | ||
80876c20 LP |
2366 | if (ioctl(fd, TIOCNOTTY) < 0) |
2367 | r = -errno; | |
2368 | ||
57cd2192 LP |
2369 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2370 | ||
80876c20 LP |
2371 | close_nointr_nofail(fd); |
2372 | return r; | |
2373 | } | |
2374 | ||
9a34ec5f LP |
2375 | int sigaction_many(const struct sigaction *sa, ...) { |
2376 | va_list ap; | |
2377 | int r = 0, sig; | |
2378 | ||
2379 | va_start(ap, sa); | |
2380 | while ((sig = va_arg(ap, int)) > 0) | |
2381 | if (sigaction(sig, sa, NULL) < 0) | |
2382 | r = -errno; | |
2383 | va_end(ap); | |
2384 | ||
2385 | return r; | |
2386 | } | |
2387 | ||
2388 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2389 | struct sigaction sa; |
9a34ec5f LP |
2390 | va_list ap; |
2391 | int r = 0; | |
a337c6fc LP |
2392 | |
2393 | zero(sa); | |
2394 | sa.sa_handler = SIG_IGN; | |
2395 | sa.sa_flags = SA_RESTART; | |
2396 | ||
9a34ec5f LP |
2397 | if (sigaction(sig, &sa, NULL) < 0) |
2398 | r = -errno; | |
2399 | ||
2400 | va_start(ap, sig); | |
2401 | while ((sig = va_arg(ap, int)) > 0) | |
2402 | if (sigaction(sig, &sa, NULL) < 0) | |
2403 | r = -errno; | |
2404 | va_end(ap); | |
2405 | ||
2406 | return r; | |
2407 | } | |
2408 | ||
2409 | int default_signals(int sig, ...) { | |
2410 | struct sigaction sa; | |
2411 | va_list ap; | |
2412 | int r = 0; | |
2413 | ||
2414 | zero(sa); | |
2415 | sa.sa_handler = SIG_DFL; | |
2416 | sa.sa_flags = SA_RESTART; | |
2417 | ||
2418 | if (sigaction(sig, &sa, NULL) < 0) | |
2419 | r = -errno; | |
2420 | ||
2421 | va_start(ap, sig); | |
2422 | while ((sig = va_arg(ap, int)) > 0) | |
2423 | if (sigaction(sig, &sa, NULL) < 0) | |
2424 | r = -errno; | |
2425 | va_end(ap); | |
2426 | ||
2427 | return r; | |
a337c6fc LP |
2428 | } |
2429 | ||
8d567588 LP |
2430 | int close_pipe(int p[]) { |
2431 | int a = 0, b = 0; | |
2432 | ||
2433 | assert(p); | |
2434 | ||
2435 | if (p[0] >= 0) { | |
2436 | a = close_nointr(p[0]); | |
2437 | p[0] = -1; | |
2438 | } | |
2439 | ||
2440 | if (p[1] >= 0) { | |
2441 | b = close_nointr(p[1]); | |
2442 | p[1] = -1; | |
2443 | } | |
2444 | ||
2445 | return a < 0 ? a : b; | |
2446 | } | |
2447 | ||
eb22ac37 | 2448 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2449 | uint8_t *p; |
2450 | ssize_t n = 0; | |
2451 | ||
2452 | assert(fd >= 0); | |
2453 | assert(buf); | |
2454 | ||
2455 | p = buf; | |
2456 | ||
2457 | while (nbytes > 0) { | |
2458 | ssize_t k; | |
2459 | ||
2460 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2461 | ||
eb22ac37 | 2462 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2463 | continue; |
2464 | ||
eb22ac37 | 2465 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2466 | struct pollfd pollfd; |
2467 | ||
2468 | zero(pollfd); | |
2469 | pollfd.fd = fd; | |
2470 | pollfd.events = POLLIN; | |
2471 | ||
2472 | if (poll(&pollfd, 1, -1) < 0) { | |
2473 | if (errno == EINTR) | |
2474 | continue; | |
2475 | ||
2476 | return n > 0 ? n : -errno; | |
2477 | } | |
2478 | ||
2479 | if (pollfd.revents != POLLIN) | |
2480 | return n > 0 ? n : -EIO; | |
2481 | ||
2482 | continue; | |
2483 | } | |
2484 | ||
2485 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2486 | } | |
2487 | ||
2488 | p += k; | |
2489 | nbytes -= k; | |
2490 | n += k; | |
2491 | } | |
2492 | ||
2493 | return n; | |
2494 | } | |
2495 | ||
eb22ac37 LP |
2496 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2497 | const uint8_t *p; | |
2498 | ssize_t n = 0; | |
2499 | ||
2500 | assert(fd >= 0); | |
2501 | assert(buf); | |
2502 | ||
2503 | p = buf; | |
2504 | ||
2505 | while (nbytes > 0) { | |
2506 | ssize_t k; | |
2507 | ||
fe652127 LP |
2508 | k = write(fd, p, nbytes); |
2509 | if (k <= 0) { | |
eb22ac37 LP |
2510 | |
2511 | if (k < 0 && errno == EINTR) | |
2512 | continue; | |
2513 | ||
2514 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2515 | struct pollfd pollfd; | |
2516 | ||
2517 | zero(pollfd); | |
2518 | pollfd.fd = fd; | |
2519 | pollfd.events = POLLOUT; | |
2520 | ||
2521 | if (poll(&pollfd, 1, -1) < 0) { | |
2522 | if (errno == EINTR) | |
2523 | continue; | |
2524 | ||
2525 | return n > 0 ? n : -errno; | |
2526 | } | |
2527 | ||
2528 | if (pollfd.revents != POLLOUT) | |
2529 | return n > 0 ? n : -EIO; | |
2530 | ||
2531 | continue; | |
2532 | } | |
2533 | ||
2534 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2535 | } | |
2536 | ||
2537 | p += k; | |
2538 | nbytes -= k; | |
2539 | n += k; | |
2540 | } | |
2541 | ||
2542 | return n; | |
2543 | } | |
2544 | ||
ab1f0633 LP |
2545 | int parse_bytes(const char *t, off_t *bytes) { |
2546 | static const struct { | |
2547 | const char *suffix; | |
2548 | off_t factor; | |
2549 | } table[] = { | |
2550 | { "B", 1 }, | |
2551 | { "K", 1024ULL }, | |
2552 | { "M", 1024ULL*1024ULL }, | |
2553 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2554 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2555 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2556 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2557 | { "", 1 }, |
2558 | }; | |
2559 | ||
2560 | const char *p; | |
2561 | off_t r = 0; | |
2562 | ||
2563 | assert(t); | |
2564 | assert(bytes); | |
2565 | ||
2566 | p = t; | |
2567 | do { | |
2568 | long long l; | |
2569 | char *e; | |
2570 | unsigned i; | |
2571 | ||
2572 | errno = 0; | |
2573 | l = strtoll(p, &e, 10); | |
2574 | ||
2575 | if (errno != 0) | |
2576 | return -errno; | |
2577 | ||
2578 | if (l < 0) | |
2579 | return -ERANGE; | |
2580 | ||
2581 | if (e == p) | |
2582 | return -EINVAL; | |
2583 | ||
2584 | e += strspn(e, WHITESPACE); | |
2585 | ||
2586 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2587 | if (startswith(e, table[i].suffix)) { | |
2588 | r += (off_t) l * table[i].factor; | |
2589 | p = e + strlen(table[i].suffix); | |
2590 | break; | |
2591 | } | |
2592 | ||
2593 | if (i >= ELEMENTSOF(table)) | |
2594 | return -EINVAL; | |
2595 | ||
2596 | } while (*p != 0); | |
2597 | ||
2598 | *bytes = r; | |
2599 | ||
2600 | return 0; | |
2601 | } | |
2602 | ||
843d2643 LP |
2603 | int make_stdio(int fd) { |
2604 | int r, s, t; | |
2605 | ||
2606 | assert(fd >= 0); | |
2607 | ||
73836c5c LP |
2608 | r = dup3(fd, STDIN_FILENO, 0); |
2609 | s = dup3(fd, STDOUT_FILENO, 0); | |
2610 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2611 | |
2612 | if (fd >= 3) | |
2613 | close_nointr_nofail(fd); | |
2614 | ||
2615 | if (r < 0 || s < 0 || t < 0) | |
2616 | return -errno; | |
2617 | ||
73836c5c | 2618 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2619 | |
843d2643 LP |
2620 | return 0; |
2621 | } | |
2622 | ||
ade509ce LP |
2623 | int make_null_stdio(void) { |
2624 | int null_fd; | |
2625 | ||
cd3bd60a LP |
2626 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2627 | if (null_fd < 0) | |
ade509ce LP |
2628 | return -errno; |
2629 | ||
2630 | return make_stdio(null_fd); | |
2631 | } | |
2632 | ||
8407a5d0 LP |
2633 | bool is_device_path(const char *path) { |
2634 | ||
2635 | /* Returns true on paths that refer to a device, either in | |
2636 | * sysfs or in /dev */ | |
2637 | ||
2638 | return | |
2639 | path_startswith(path, "/dev/") || | |
2640 | path_startswith(path, "/sys/"); | |
2641 | } | |
2642 | ||
01f78473 | 2643 | int dir_is_empty(const char *path) { |
a05f97b3 | 2644 | _cleanup_closedir_ DIR *d; |
01f78473 | 2645 | int r; |
01f78473 | 2646 | |
a05f97b3 LP |
2647 | d = opendir(path); |
2648 | if (!d) | |
01f78473 LP |
2649 | return -errno; |
2650 | ||
2651 | for (;;) { | |
7d5e9c0f LP |
2652 | struct dirent *de; |
2653 | union dirent_storage buf; | |
01f78473 | 2654 | |
7d5e9c0f | 2655 | r = readdir_r(d, &buf.de, &de); |
a05f97b3 LP |
2656 | if (r > 0) |
2657 | return -r; | |
01f78473 | 2658 | |
a05f97b3 LP |
2659 | if (!de) |
2660 | return 1; | |
01f78473 | 2661 | |
a05f97b3 LP |
2662 | if (!ignore_file(de->d_name)) |
2663 | return 0; | |
2664 | } | |
01f78473 LP |
2665 | } |
2666 | ||
d3782d60 | 2667 | unsigned long long random_ull(void) { |
a05f97b3 | 2668 | _cleanup_close_ int fd; |
d3782d60 LP |
2669 | uint64_t ull; |
2670 | ssize_t r; | |
2671 | ||
ac0930c8 LP |
2672 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2673 | if (fd < 0) | |
d3782d60 LP |
2674 | goto fallback; |
2675 | ||
eb22ac37 | 2676 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
2677 | if (r != sizeof(ull)) |
2678 | goto fallback; | |
2679 | ||
2680 | return ull; | |
2681 | ||
2682 | fallback: | |
2683 | return random() * RAND_MAX + random(); | |
2684 | } | |
2685 | ||
5b6319dc LP |
2686 | void rename_process(const char name[8]) { |
2687 | assert(name); | |
2688 | ||
5d6b1584 LP |
2689 | /* This is a like a poor man's setproctitle(). It changes the |
2690 | * comm field, argv[0], and also the glibc's internally used | |
2691 | * name of the process. For the first one a limit of 16 chars | |
2692 | * applies, to the second one usually one of 10 (i.e. length | |
2693 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2694 | * "systemd"). If you pass a longer string it will be | |
2695 | * truncated */ | |
5b6319dc | 2696 | |
5d6b1584 | 2697 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2698 | |
2699 | if (program_invocation_name) | |
2700 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2701 | |
2702 | if (saved_argc > 0) { | |
2703 | int i; | |
2704 | ||
2705 | if (saved_argv[0]) | |
2706 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2707 | ||
2708 | for (i = 1; i < saved_argc; i++) { | |
2709 | if (!saved_argv[i]) | |
2710 | break; | |
2711 | ||
2712 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
2713 | } | |
2714 | } | |
5b6319dc LP |
2715 | } |
2716 | ||
7d793605 LP |
2717 | void sigset_add_many(sigset_t *ss, ...) { |
2718 | va_list ap; | |
2719 | int sig; | |
2720 | ||
2721 | assert(ss); | |
2722 | ||
2723 | va_start(ap, ss); | |
2724 | while ((sig = va_arg(ap, int)) > 0) | |
2725 | assert_se(sigaddset(ss, sig) == 0); | |
2726 | va_end(ap); | |
2727 | } | |
2728 | ||
ef2f1067 LP |
2729 | char* gethostname_malloc(void) { |
2730 | struct utsname u; | |
2731 | ||
2732 | assert_se(uname(&u) >= 0); | |
2733 | ||
344de609 | 2734 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2735 | return strdup(u.nodename); |
2736 | ||
2737 | return strdup(u.sysname); | |
2738 | } | |
2739 | ||
344de609 LP |
2740 | bool hostname_is_set(void) { |
2741 | struct utsname u; | |
2742 | ||
2743 | assert_se(uname(&u) >= 0); | |
2744 | ||
2745 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2746 | } | |
2747 | ||
7c5f152a | 2748 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 2749 | long bufsize; |
a05f97b3 LP |
2750 | char *name; |
2751 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2752 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2753 | |
2754 | /* Shortcut things to avoid NSS lookups */ | |
2755 | if (uid == 0) | |
2756 | return strdup("root"); | |
2757 | ||
7c5f152a LP |
2758 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2759 | if (bufsize <= 0) | |
ef2f1067 LP |
2760 | bufsize = 4096; |
2761 | ||
7c5f152a LP |
2762 | buf = malloc(bufsize); |
2763 | if (!buf) | |
ef2f1067 LP |
2764 | return NULL; |
2765 | ||
a05f97b3 LP |
2766 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2767 | return strdup(pw->pw_name); | |
ef2f1067 LP |
2768 | |
2769 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
2770 | return NULL; | |
2771 | ||
2772 | return name; | |
2773 | } | |
2774 | ||
7c5f152a LP |
2775 | char* getlogname_malloc(void) { |
2776 | uid_t uid; | |
2777 | struct stat st; | |
2778 | ||
2779 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2780 | uid = st.st_uid; | |
2781 | else | |
2782 | uid = getuid(); | |
2783 | ||
2784 | return lookup_uid(uid); | |
2785 | } | |
2786 | ||
2787 | char *getusername_malloc(void) { | |
2788 | const char *e; | |
2789 | ||
2790 | e = getenv("USER"); | |
2791 | if (e) | |
2792 | return strdup(e); | |
2793 | ||
2794 | return lookup_uid(getuid()); | |
2795 | } | |
2796 | ||
fc116c6a LP |
2797 | int getttyname_malloc(int fd, char **r) { |
2798 | char path[PATH_MAX], *c; | |
618e02c7 | 2799 | int k; |
8c6db833 LP |
2800 | |
2801 | assert(r); | |
ef2f1067 | 2802 | |
a05f97b3 LP |
2803 | k = ttyname_r(fd, path, sizeof(path)); |
2804 | if (k != 0) | |
618e02c7 | 2805 | return -k; |
ef2f1067 LP |
2806 | |
2807 | char_array_0(path); | |
2808 | ||
a05f97b3 LP |
2809 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
2810 | if (!c) | |
8c6db833 LP |
2811 | return -ENOMEM; |
2812 | ||
2813 | *r = c; | |
2814 | return 0; | |
2815 | } | |
2816 | ||
fc116c6a LP |
2817 | int getttyname_harder(int fd, char **r) { |
2818 | int k; | |
2819 | char *s; | |
2820 | ||
a05f97b3 LP |
2821 | k = getttyname_malloc(fd, &s); |
2822 | if (k < 0) | |
fc116c6a LP |
2823 | return k; |
2824 | ||
2825 | if (streq(s, "tty")) { | |
2826 | free(s); | |
4d6d6518 | 2827 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2828 | } |
2829 | ||
2830 | *r = s; | |
2831 | return 0; | |
2832 | } | |
2833 | ||
4d6d6518 | 2834 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
fc116c6a | 2835 | int k; |
4d6d6518 | 2836 | char line[LINE_MAX], *p, *fn; |
fc116c6a LP |
2837 | unsigned long ttynr; |
2838 | FILE *f; | |
2839 | ||
4d6d6518 LP |
2840 | if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0) |
2841 | return -ENOMEM; | |
2842 | ||
2843 | f = fopen(fn, "re"); | |
2844 | free(fn); | |
2845 | if (!f) | |
fc116c6a LP |
2846 | return -errno; |
2847 | ||
4d6d6518 | 2848 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 2849 | k = feof(f) ? -EIO : -errno; |
fc116c6a LP |
2850 | fclose(f); |
2851 | return k; | |
2852 | } | |
2853 | ||
2854 | fclose(f); | |
2855 | ||
4d6d6518 LP |
2856 | p = strrchr(line, ')'); |
2857 | if (!p) | |
fc116c6a LP |
2858 | return -EIO; |
2859 | ||
2860 | p++; | |
2861 | ||
2862 | if (sscanf(p, " " | |
2863 | "%*c " /* state */ | |
2864 | "%*d " /* ppid */ | |
2865 | "%*d " /* pgrp */ | |
2866 | "%*d " /* session */ | |
2867 | "%lu ", /* ttynr */ | |
2868 | &ttynr) != 1) | |
2869 | return -EIO; | |
2870 | ||
11dc5d2b LP |
2871 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2872 | return -ENOENT; | |
2873 | ||
fc116c6a LP |
2874 | *d = (dev_t) ttynr; |
2875 | return 0; | |
2876 | } | |
2877 | ||
4d6d6518 | 2878 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 2879 | int k; |
20c03b7b | 2880 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
2881 | dev_t devnr; |
2882 | ||
2883 | assert(r); | |
2884 | ||
4d6d6518 LP |
2885 | k = get_ctty_devnr(pid, &devnr); |
2886 | if (k < 0) | |
fc116c6a LP |
2887 | return k; |
2888 | ||
2889 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
2890 | char_array_0(fn); | |
2891 | ||
23406ce5 LP |
2892 | k = readlink_malloc(fn, &s); |
2893 | if (k < 0) { | |
fc116c6a LP |
2894 | |
2895 | if (k != -ENOENT) | |
2896 | return k; | |
2897 | ||
46824d0e LP |
2898 | /* This is an ugly hack */ |
2899 | if (major(devnr) == 136) { | |
2900 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
2901 | return -ENOMEM; | |
2902 | ||
2903 | *r = b; | |
2904 | if (_devnr) | |
2905 | *_devnr = devnr; | |
2906 | ||
2907 | return 0; | |
2908 | } | |
2909 | ||
fc116c6a LP |
2910 | /* Probably something like the ptys which have no |
2911 | * symlink in /dev/char. Let's return something | |
2912 | * vaguely useful. */ | |
2913 | ||
23406ce5 LP |
2914 | b = strdup(fn + 5); |
2915 | if (!b) | |
fc116c6a LP |
2916 | return -ENOMEM; |
2917 | ||
2918 | *r = b; | |
46824d0e LP |
2919 | if (_devnr) |
2920 | *_devnr = devnr; | |
2921 | ||
fc116c6a LP |
2922 | return 0; |
2923 | } | |
2924 | ||
2925 | if (startswith(s, "/dev/")) | |
2926 | p = s + 5; | |
2927 | else if (startswith(s, "../")) | |
2928 | p = s + 3; | |
2929 | else | |
2930 | p = s; | |
2931 | ||
2932 | b = strdup(p); | |
2933 | free(s); | |
2934 | ||
2935 | if (!b) | |
2936 | return -ENOMEM; | |
2937 | ||
2938 | *r = b; | |
46824d0e LP |
2939 | if (_devnr) |
2940 | *_devnr = devnr; | |
2941 | ||
fc116c6a LP |
2942 | return 0; |
2943 | } | |
2944 | ||
f56d5db9 | 2945 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
2946 | DIR *d; |
2947 | int ret = 0; | |
2948 | ||
2949 | assert(fd >= 0); | |
2950 | ||
2951 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2952 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2953 | |
d4d046e3 LP |
2954 | d = fdopendir(fd); |
2955 | if (!d) { | |
8c6db833 | 2956 | close_nointr_nofail(fd); |
4c633005 LP |
2957 | |
2958 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2959 | } |
2960 | ||
2961 | for (;;) { | |
7d5e9c0f LP |
2962 | struct dirent *de; |
2963 | union dirent_storage buf; | |
7925c22a LP |
2964 | bool is_dir, keep_around; |
2965 | struct stat st; | |
8c6db833 LP |
2966 | int r; |
2967 | ||
7d5e9c0f | 2968 | r = readdir_r(d, &buf.de, &de); |
d4d046e3 LP |
2969 | if (r != 0 && ret == 0) { |
2970 | ret = -r; | |
8c6db833 LP |
2971 | break; |
2972 | } | |
2973 | ||
2974 | if (!de) | |
2975 | break; | |
2976 | ||
2977 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
2978 | continue; | |
2979 | ||
7925c22a LP |
2980 | if (de->d_type == DT_UNKNOWN || |
2981 | honour_sticky || | |
2982 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2983 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2984 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2985 | ret = -errno; |
2986 | continue; | |
2987 | } | |
2988 | ||
2989 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2990 | keep_around = |
2991 | honour_sticky && | |
2992 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
2993 | (st.st_mode & S_ISVTX); | |
ad293f5a | 2994 | } else { |
8c6db833 | 2995 | is_dir = de->d_type == DT_DIR; |
7925c22a | 2996 | keep_around = false; |
ad293f5a | 2997 | } |
8c6db833 LP |
2998 | |
2999 | if (is_dir) { | |
3000 | int subdir_fd; | |
8c6db833 | 3001 | |
597f43c7 | 3002 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
3003 | if (root_dev && st.st_dev != root_dev->st_dev) |
3004 | continue; | |
8c6db833 | 3005 | |
7925c22a LP |
3006 | subdir_fd = openat(fd, de->d_name, |
3007 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
3008 | if (subdir_fd < 0) { | |
3009 | if (ret == 0 && errno != ENOENT) | |
3010 | ret = -errno; | |
3011 | continue; | |
3012 | } | |
3013 | ||
b3d28469 | 3014 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
3015 | if (r < 0 && ret == 0) |
3016 | ret = r; | |
3017 | ||
3018 | if (!keep_around) | |
3019 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
3020 | if (ret == 0 && errno != ENOENT) |
3021 | ret = -errno; | |
3022 | } | |
3023 | ||
3024 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
3025 | |
3026 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3027 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3028 | ret = -errno; |
3029 | } | |
3030 | } | |
3031 | } | |
3032 | ||
3033 | closedir(d); | |
3034 | ||
3035 | return ret; | |
3036 | } | |
3037 | ||
943aad8c ZJS |
3038 | static int is_temporary_fs(struct statfs *s) { |
3039 | assert(s); | |
3040 | return s->f_type == TMPFS_MAGIC || | |
3041 | (long)s->f_type == (long)RAMFS_MAGIC; | |
3042 | } | |
3043 | ||
f56d5db9 LP |
3044 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
3045 | struct statfs s; | |
3046 | ||
3047 | assert(fd >= 0); | |
3048 | ||
3049 | if (fstatfs(fd, &s) < 0) { | |
3050 | close_nointr_nofail(fd); | |
3051 | return -errno; | |
3052 | } | |
3053 | ||
3054 | /* We refuse to clean disk file systems with this call. This | |
3055 | * is extra paranoia just to be sure we never ever remove | |
3056 | * non-state data */ | |
943aad8c | 3057 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
3058 | log_error("Attempted to remove disk file system, and we can't allow that."); |
3059 | close_nointr_nofail(fd); | |
3060 | return -EPERM; | |
3061 | } | |
3062 | ||
3063 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
3064 | } | |
3065 | ||
3066 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
3067 | int fd, r; | |
3068 | struct statfs s; | |
8c6db833 LP |
3069 | |
3070 | assert(path); | |
3071 | ||
f56d5db9 LP |
3072 | /* We refuse to clean the root file system with this |
3073 | * call. This is extra paranoia to never cause a really | |
3074 | * seriously broken system. */ | |
3075 | if (path_equal(path, "/")) { | |
3076 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
3077 | return -EPERM; | |
3078 | } | |
461b1822 | 3079 | |
d4d046e3 LP |
3080 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
3081 | if (fd < 0) { | |
8c6db833 LP |
3082 | |
3083 | if (errno != ENOTDIR) | |
3084 | return -errno; | |
3085 | ||
f56d5db9 LP |
3086 | if (!dangerous) { |
3087 | if (statfs(path, &s) < 0) | |
3088 | return -errno; | |
3089 | ||
943aad8c | 3090 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
3091 | log_error("Attempted to remove disk file system, and we can't allow that."); |
3092 | return -EPERM; | |
3093 | } | |
3094 | } | |
3095 | ||
8c6db833 | 3096 | if (delete_root && !only_dirs) |
d4d046e3 | 3097 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
3098 | return -errno; |
3099 | ||
3100 | return 0; | |
3101 | } | |
3102 | ||
f56d5db9 LP |
3103 | if (!dangerous) { |
3104 | if (fstatfs(fd, &s) < 0) { | |
3105 | close_nointr_nofail(fd); | |
3106 | return -errno; | |
3107 | } | |
ad293f5a | 3108 | |
943aad8c | 3109 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
3110 | log_error("Attempted to remove disk file system, and we can't allow that."); |
3111 | close_nointr_nofail(fd); | |
3112 | return -EPERM; | |
3113 | } | |
3114 | } | |
3115 | ||
3116 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
3117 | if (delete_root) { |
3118 | ||
8d53b453 | 3119 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 3120 | return r; |
8c6db833 | 3121 | |
e27796a0 | 3122 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
3123 | if (r == 0) |
3124 | r = -errno; | |
3125 | } | |
ad293f5a | 3126 | } |
8c6db833 LP |
3127 | |
3128 | return r; | |
3129 | } | |
3130 | ||
f56d5db9 LP |
3131 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
3132 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
3133 | } | |
3134 | ||
3135 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
3136 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
3137 | } | |
3138 | ||
8c6db833 LP |
3139 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
3140 | assert(path); | |
3141 | ||
3142 | /* Under the assumption that we are running privileged we | |
3143 | * first change the access mode and only then hand out | |
3144 | * ownership to avoid a window where access is too open. */ | |
3145 | ||
8d53b453 LP |
3146 | if (mode != (mode_t) -1) |
3147 | if (chmod(path, mode) < 0) | |
3148 | return -errno; | |
8c6db833 | 3149 | |
8d53b453 LP |
3150 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
3151 | if (chown(path, uid, gid) < 0) | |
3152 | return -errno; | |
8c6db833 LP |
3153 | |
3154 | return 0; | |
ef2f1067 LP |
3155 | } |
3156 | ||
f4b47811 LP |
3157 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
3158 | assert(fd >= 0); | |
3159 | ||
3160 | /* Under the assumption that we are running privileged we | |
3161 | * first change the access mode and only then hand out | |
3162 | * ownership to avoid a window where access is too open. */ | |
3163 | ||
3164 | if (fchmod(fd, mode) < 0) | |
3165 | return -errno; | |
3166 | ||
3167 | if (fchown(fd, uid, gid) < 0) | |
3168 | return -errno; | |
3169 | ||
3170 | return 0; | |
3171 | } | |
3172 | ||
82c121a4 LP |
3173 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3174 | cpu_set_t *r; | |
3175 | unsigned n = 1024; | |
3176 | ||
3177 | /* Allocates the cpuset in the right size */ | |
3178 | ||
3179 | for (;;) { | |
3180 | if (!(r = CPU_ALLOC(n))) | |
3181 | return NULL; | |
3182 | ||
3183 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3184 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3185 | ||
3186 | if (ncpus) | |
3187 | *ncpus = n; | |
3188 | ||
3189 | return r; | |
3190 | } | |
3191 | ||
3192 | CPU_FREE(r); | |
3193 | ||
3194 | if (errno != EINVAL) | |
3195 | return NULL; | |
3196 | ||
3197 | n *= 2; | |
3198 | } | |
3199 | } | |
3200 | ||
669bec5d | 3201 | int status_vprintf(const char *status, bool ellipse, const char *format, va_list ap) { |
9ab7a8d2 | 3202 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
3203 | _cleanup_free_ char *s = NULL; |
3204 | _cleanup_close_ int fd = -1; | |
81beb750 LP |
3205 | struct iovec iovec[5]; |
3206 | int n = 0; | |
9e58ff9c LP |
3207 | |
3208 | assert(format); | |
3209 | ||
9ab7a8d2 | 3210 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
3211 | * optional and go exclusively to the console. */ |
3212 | ||
3213 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 3214 | return log_oom(); |
9e58ff9c | 3215 | |
67e5cc4f | 3216 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 3217 | if (fd < 0) |
669bec5d | 3218 | return fd; |
9e58ff9c | 3219 | |
67e5cc4f | 3220 | if (ellipse) { |
9ab7a8d2 MS |
3221 | char *e; |
3222 | size_t emax, sl; | |
3223 | int c; | |
3224 | ||
67e5cc4f LP |
3225 | c = fd_columns(fd); |
3226 | if (c <= 0) | |
3227 | c = 80; | |
81beb750 | 3228 | |
669bec5d | 3229 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
3230 | |
3231 | emax = c - sl - 1; | |
3232 | if (emax < 3) | |
3233 | emax = 3; | |
81beb750 | 3234 | |
67e5cc4f LP |
3235 | e = ellipsize(s, emax, 75); |
3236 | if (e) { | |
3237 | free(s); | |
3238 | s = e; | |
3239 | } | |
81beb750 LP |
3240 | } |
3241 | ||
3242 | zero(iovec); | |
81beb750 | 3243 | |
9ab7a8d2 MS |
3244 | if (status) { |
3245 | if (!isempty(status)) { | |
3246 | IOVEC_SET_STRING(iovec[n++], "["); | |
3247 | IOVEC_SET_STRING(iovec[n++], status); | |
3248 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3249 | } else | |
3250 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3251 | } |
3252 | ||
9ab7a8d2 MS |
3253 | IOVEC_SET_STRING(iovec[n++], s); |
3254 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 3255 | |
669bec5d LP |
3256 | if (writev(fd, iovec, n) < 0) |
3257 | return -errno; | |
9e58ff9c | 3258 | |
669bec5d | 3259 | return 0; |
9e58ff9c LP |
3260 | } |
3261 | ||
669bec5d | 3262 | int status_printf(const char *status, bool ellipse, const char *format, ...) { |
c846ff47 | 3263 | va_list ap; |
669bec5d | 3264 | int r; |
c846ff47 LP |
3265 | |
3266 | assert(format); | |
3267 | ||
3268 | va_start(ap, format); | |
669bec5d | 3269 | r = status_vprintf(status, ellipse, format, ap); |
c846ff47 | 3270 | va_end(ap); |
669bec5d LP |
3271 | |
3272 | return r; | |
c846ff47 LP |
3273 | } |
3274 | ||
669bec5d | 3275 | int status_welcome(void) { |
10aa7034 | 3276 | int r; |
669bec5d LP |
3277 | _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL; |
3278 | ||
3279 | r = parse_env_file("/etc/os-release", NEWLINE, | |
3280 | "PRETTY_NAME", &pretty_name, | |
3281 | "ANSI_COLOR", &ansi_color, | |
3282 | NULL); | |
3283 | if (r < 0 && r != -ENOENT) | |
3284 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3285 | ||
3286 | return status_printf(NULL, false, | |
3287 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", | |
3288 | isempty(ansi_color) ? "1" : ansi_color, | |
3289 | isempty(pretty_name) ? "Linux" : pretty_name); | |
c846ff47 LP |
3290 | } |
3291 | ||
fab56fc5 LP |
3292 | char *replace_env(const char *format, char **env) { |
3293 | enum { | |
3294 | WORD, | |
c24eb49e | 3295 | CURLY, |
fab56fc5 LP |
3296 | VARIABLE |
3297 | } state = WORD; | |
3298 | ||
3299 | const char *e, *word = format; | |
3300 | char *r = NULL, *k; | |
3301 | ||
3302 | assert(format); | |
3303 | ||
3304 | for (e = format; *e; e ++) { | |
3305 | ||
3306 | switch (state) { | |
3307 | ||
3308 | case WORD: | |
3309 | if (*e == '$') | |
c24eb49e | 3310 | state = CURLY; |
fab56fc5 LP |
3311 | break; |
3312 | ||
c24eb49e LP |
3313 | case CURLY: |
3314 | if (*e == '{') { | |
fab56fc5 LP |
3315 | if (!(k = strnappend(r, word, e-word-1))) |
3316 | goto fail; | |
3317 | ||
3318 | free(r); | |
3319 | r = k; | |
3320 | ||
3321 | word = e-1; | |
3322 | state = VARIABLE; | |
3323 | ||
3324 | } else if (*e == '$') { | |
3325 | if (!(k = strnappend(r, word, e-word))) | |
3326 | goto fail; | |
3327 | ||
3328 | free(r); | |
3329 | r = k; | |
3330 | ||
3331 | word = e+1; | |
3332 | state = WORD; | |
3333 | } else | |
3334 | state = WORD; | |
3335 | break; | |
3336 | ||
3337 | case VARIABLE: | |
c24eb49e | 3338 | if (*e == '}') { |
b95cf362 | 3339 | const char *t; |
fab56fc5 | 3340 | |
4d1a6904 | 3341 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 3342 | |
4d1a6904 LP |
3343 | k = strappend(r, t); |
3344 | if (!k) | |
b95cf362 | 3345 | goto fail; |
fab56fc5 | 3346 | |
b95cf362 LP |
3347 | free(r); |
3348 | r = k; | |
fab56fc5 | 3349 | |
b95cf362 | 3350 | word = e+1; |
fab56fc5 LP |
3351 | state = WORD; |
3352 | } | |
3353 | break; | |
3354 | } | |
3355 | } | |
3356 | ||
3357 | if (!(k = strnappend(r, word, e-word))) | |
3358 | goto fail; | |
3359 | ||
3360 | free(r); | |
3361 | return k; | |
3362 | ||
3363 | fail: | |
3364 | free(r); | |
3365 | return NULL; | |
3366 | } | |
3367 | ||
3368 | char **replace_env_argv(char **argv, char **env) { | |
3369 | char **r, **i; | |
c24eb49e LP |
3370 | unsigned k = 0, l = 0; |
3371 | ||
3372 | l = strv_length(argv); | |
fab56fc5 | 3373 | |
c24eb49e | 3374 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3375 | return NULL; |
3376 | ||
3377 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3378 | |
3379 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3380 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3381 | char *e; | |
3382 | char **w, **m; | |
3383 | unsigned q; | |
c24eb49e | 3384 | |
4d1a6904 LP |
3385 | e = strv_env_get(env, *i+1); |
3386 | if (e) { | |
c24eb49e LP |
3387 | |
3388 | if (!(m = strv_split_quoted(e))) { | |
3389 | r[k] = NULL; | |
3390 | strv_free(r); | |
3391 | return NULL; | |
3392 | } | |
b95cf362 LP |
3393 | } else |
3394 | m = NULL; | |
c24eb49e | 3395 | |
b95cf362 LP |
3396 | q = strv_length(m); |
3397 | l = l + q - 1; | |
c24eb49e | 3398 | |
b95cf362 LP |
3399 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3400 | r[k] = NULL; | |
3401 | strv_free(r); | |
3402 | strv_free(m); | |
3403 | return NULL; | |
3404 | } | |
c24eb49e | 3405 | |
b95cf362 LP |
3406 | r = w; |
3407 | if (m) { | |
c24eb49e LP |
3408 | memcpy(r + k, m, q * sizeof(char*)); |
3409 | free(m); | |
c24eb49e | 3410 | } |
b95cf362 LP |
3411 | |
3412 | k += q; | |
3413 | continue; | |
c24eb49e LP |
3414 | } |
3415 | ||
3416 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3417 | if (!(r[k++] = replace_env(*i, env))) { |
3418 | strv_free(r); | |
3419 | return NULL; | |
3420 | } | |
3421 | } | |
3422 | ||
3423 | r[k] = NULL; | |
3424 | return r; | |
3425 | } | |
3426 | ||
81beb750 LP |
3427 | int fd_columns(int fd) { |
3428 | struct winsize ws; | |
3429 | zero(ws); | |
3430 | ||
3431 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3432 | return -errno; | |
3433 | ||
3434 | if (ws.ws_col <= 0) | |
3435 | return -EIO; | |
3436 | ||
3437 | return ws.ws_col; | |
3438 | } | |
3439 | ||
28917d7d | 3440 | unsigned columns(void) { |
fa776d8e | 3441 | const char *e; |
7009eec2 | 3442 | int c; |
fa776d8e | 3443 | |
28917d7d LP |
3444 | if (_likely_(cached_columns > 0)) |
3445 | return cached_columns; | |
11f96fac | 3446 | |
28917d7d LP |
3447 | c = 0; |
3448 | e = getenv("COLUMNS"); | |
3449 | if (e) | |
7009eec2 | 3450 | safe_atoi(e, &c); |
fa776d8e | 3451 | |
28917d7d LP |
3452 | if (c <= 0) |
3453 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3454 | |
28917d7d LP |
3455 | if (c <= 0) |
3456 | c = 80; | |
11f96fac | 3457 | |
28917d7d LP |
3458 | cached_columns = c; |
3459 | return c; | |
11f96fac ZJS |
3460 | } |
3461 | ||
8f2d43a0 LP |
3462 | int fd_lines(int fd) { |
3463 | struct winsize ws; | |
3464 | zero(ws); | |
3465 | ||
3466 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3467 | return -errno; | |
3468 | ||
3469 | if (ws.ws_row <= 0) | |
3470 | return -EIO; | |
3471 | ||
3472 | return ws.ws_row; | |
3473 | } | |
3474 | ||
3475 | unsigned lines(void) { | |
8f2d43a0 | 3476 | const char *e; |
ed757c0c | 3477 | unsigned l; |
8f2d43a0 | 3478 | |
ed757c0c LP |
3479 | if (_likely_(cached_lines > 0)) |
3480 | return cached_lines; | |
8f2d43a0 | 3481 | |
ed757c0c | 3482 | l = 0; |
8f2d43a0 LP |
3483 | e = getenv("LINES"); |
3484 | if (e) | |
ed757c0c | 3485 | safe_atou(e, &l); |
8f2d43a0 | 3486 | |
ed757c0c LP |
3487 | if (l <= 0) |
3488 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3489 | |
ed757c0c LP |
3490 | if (l <= 0) |
3491 | l = 24; | |
8f2d43a0 | 3492 | |
ed757c0c LP |
3493 | cached_lines = l; |
3494 | return cached_lines; | |
3495 | } | |
3496 | ||
3497 | /* intended to be used as a SIGWINCH sighandler */ | |
3498 | void columns_lines_cache_reset(int signum) { | |
3499 | cached_columns = 0; | |
3500 | cached_lines = 0; | |
3501 | } | |
3502 | ||
3503 | bool on_tty(void) { | |
3504 | static int cached_on_tty = -1; | |
3505 | ||
3506 | if (_unlikely_(cached_on_tty < 0)) | |
3507 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3508 | ||
3509 | return cached_on_tty; | |
8f2d43a0 LP |
3510 | } |
3511 | ||
b4f10a5e LP |
3512 | int running_in_chroot(void) { |
3513 | struct stat a, b; | |
3514 | ||
3515 | zero(a); | |
3516 | zero(b); | |
3517 | ||
3518 | /* Only works as root */ | |
3519 | ||
3520 | if (stat("/proc/1/root", &a) < 0) | |
3521 | return -errno; | |
3522 | ||
3523 | if (stat("/", &b) < 0) | |
3524 | return -errno; | |
3525 | ||
3526 | return | |
3527 | a.st_dev != b.st_dev || | |
3528 | a.st_ino != b.st_ino; | |
3529 | } | |
3530 | ||
72f59706 LP |
3531 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3532 | size_t x; | |
8fe914ec LP |
3533 | char *r; |
3534 | ||
3535 | assert(s); | |
3536 | assert(percent <= 100); | |
72f59706 | 3537 | assert(new_length >= 3); |
8fe914ec | 3538 | |
72f59706 LP |
3539 | if (old_length <= 3 || old_length <= new_length) |
3540 | return strndup(s, old_length); | |
8fe914ec | 3541 | |
72f59706 LP |
3542 | r = new0(char, new_length+1); |
3543 | if (!r) | |
8fe914ec LP |
3544 | return r; |
3545 | ||
72f59706 | 3546 | x = (new_length * percent) / 100; |
8fe914ec | 3547 | |
72f59706 LP |
3548 | if (x > new_length - 3) |
3549 | x = new_length - 3; | |
8fe914ec LP |
3550 | |
3551 | memcpy(r, s, x); | |
3552 | r[x] = '.'; | |
3553 | r[x+1] = '.'; | |
3554 | r[x+2] = '.'; | |
3555 | memcpy(r + x + 3, | |
72f59706 LP |
3556 | s + old_length - (new_length - x - 3), |
3557 | new_length - x - 3); | |
8fe914ec LP |
3558 | |
3559 | return r; | |
3560 | } | |
3561 | ||
72f59706 LP |
3562 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3563 | return ellipsize_mem(s, strlen(s), length, percent); | |
3564 | } | |
3565 | ||
f6144808 LP |
3566 | int touch(const char *path) { |
3567 | int fd; | |
3568 | ||
3569 | assert(path); | |
3570 | ||
73836c5c LP |
3571 | /* This just opens the file for writing, ensuring it |
3572 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3573 | * does it. */ | |
3574 | ||
3575 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3576 | if (fd < 0) | |
f6144808 LP |
3577 | return -errno; |
3578 | ||
3579 | close_nointr_nofail(fd); | |
3580 | return 0; | |
3581 | } | |
afea26ad | 3582 | |
97c4a07d | 3583 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3584 | size_t l; |
3585 | assert(s); | |
3586 | ||
73836c5c LP |
3587 | /* This is rather stupid, simply removes the heading and |
3588 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3589 | * escaping or anything. We should make this smarter one |
3590 | * day...*/ | |
73836c5c | 3591 | |
31ed59c5 LP |
3592 | l = strlen(s); |
3593 | if (l < 2) | |
11ce3427 LP |
3594 | return strdup(s); |
3595 | ||
97c4a07d | 3596 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3597 | return strndup(s+1, l-2); |
3598 | ||
3599 | return strdup(s); | |
3600 | } | |
3601 | ||
5f7c426e | 3602 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3603 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3604 | char *eq, *r; | |
5f7c426e | 3605 | |
57f30678 LP |
3606 | eq = strchr(s, '='); |
3607 | if (!eq) { | |
3608 | char *t; | |
5f7c426e | 3609 | |
57f30678 LP |
3610 | r = strdup(s); |
3611 | if (!r) | |
5f7c426e LP |
3612 | return NULL; |
3613 | ||
57f30678 LP |
3614 | t = strstrip(r); |
3615 | if (t == r) | |
3616 | return r; | |
3617 | ||
3618 | memmove(r, t, strlen(t) + 1); | |
3619 | return r; | |
5f7c426e LP |
3620 | } |
3621 | ||
57f30678 LP |
3622 | name = strndup(s, eq - s); |
3623 | if (!name) | |
5f7c426e LP |
3624 | return NULL; |
3625 | ||
57f30678 LP |
3626 | p = strdup(eq + 1); |
3627 | if (!p) | |
5f7c426e | 3628 | return NULL; |
5f7c426e LP |
3629 | |
3630 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3631 | if (!value) |
5f7c426e | 3632 | return NULL; |
5f7c426e | 3633 | |
57f30678 | 3634 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3635 | r = NULL; |
3636 | ||
5f7c426e LP |
3637 | return r; |
3638 | } | |
3639 | ||
8e12a6ae | 3640 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3641 | siginfo_t dummy; |
3642 | ||
2e78aa99 | 3643 | assert(pid >= 1); |
1968a360 LP |
3644 | |
3645 | if (!status) | |
3646 | status = &dummy; | |
2e78aa99 LP |
3647 | |
3648 | for (;;) { | |
8e12a6ae LP |
3649 | zero(*status); |
3650 | ||
3651 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3652 | |
3653 | if (errno == EINTR) | |
3654 | continue; | |
3655 | ||
3656 | return -errno; | |
3657 | } | |
3658 | ||
3659 | return 0; | |
3660 | } | |
3661 | } | |
3662 | ||
97c4a07d LP |
3663 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
3664 | int r; | |
3665 | siginfo_t status; | |
3666 | ||
3667 | assert(name); | |
3668 | assert(pid > 1); | |
3669 | ||
d87be9b0 LP |
3670 | r = wait_for_terminate(pid, &status); |
3671 | if (r < 0) { | |
97c4a07d LP |
3672 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
3673 | return r; | |
3674 | } | |
3675 | ||
3676 | if (status.si_code == CLD_EXITED) { | |
3677 | if (status.si_status != 0) { | |
3678 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 3679 | return status.si_status; |
97c4a07d LP |
3680 | } |
3681 | ||
3682 | log_debug("%s succeeded.", name); | |
3683 | return 0; | |
3684 | ||
3685 | } else if (status.si_code == CLD_KILLED || | |
3686 | status.si_code == CLD_DUMPED) { | |
3687 | ||
3688 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3689 | return -EPROTO; | |
3690 | } | |
3691 | ||
3692 | log_warning("%s failed due to unknown reason.", name); | |
3693 | return -EPROTO; | |
97c4a07d LP |
3694 | } |
3695 | ||
6a39419f | 3696 | _noreturn_ void freeze(void) { |
720ce21d LP |
3697 | |
3698 | /* Make sure nobody waits for us on a socket anymore */ | |
3699 | close_all_fds(NULL, 0); | |
3700 | ||
c29597a1 LP |
3701 | sync(); |
3702 | ||
3c14d26c LP |
3703 | for (;;) |
3704 | pause(); | |
3705 | } | |
3706 | ||
00dc5d76 LP |
3707 | bool null_or_empty(struct stat *st) { |
3708 | assert(st); | |
3709 | ||
3710 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3711 | return true; | |
3712 | ||
c8f26f42 | 3713 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3714 | return true; |
3715 | ||
3716 | return false; | |
3717 | } | |
3718 | ||
83096483 LP |
3719 | int null_or_empty_path(const char *fn) { |
3720 | struct stat st; | |
3721 | ||
3722 | assert(fn); | |
3723 | ||
3724 | if (stat(fn, &st) < 0) | |
3725 | return -errno; | |
3726 | ||
3727 | return null_or_empty(&st); | |
3728 | } | |
3729 | ||
a247755d | 3730 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3731 | int nfd; |
3732 | DIR *d; | |
3733 | ||
73836c5c LP |
3734 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags); |
3735 | if (nfd < 0) | |
c4731d11 LP |
3736 | return NULL; |
3737 | ||
73836c5c LP |
3738 | d = fdopendir(nfd); |
3739 | if (!d) { | |
c4731d11 LP |
3740 | close_nointr_nofail(nfd); |
3741 | return NULL; | |
3742 | } | |
3743 | ||
3744 | return d; | |
3b63d2d3 LP |
3745 | } |
3746 | ||
8a0867d6 LP |
3747 | int signal_from_string_try_harder(const char *s) { |
3748 | int signo; | |
3749 | assert(s); | |
3750 | ||
73836c5c LP |
3751 | signo = signal_from_string(s); |
3752 | if (signo <= 0) | |
8a0867d6 LP |
3753 | if (startswith(s, "SIG")) |
3754 | return signal_from_string(s+3); | |
3755 | ||
3756 | return signo; | |
3757 | } | |
3758 | ||
383182b5 | 3759 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
e23a0ce8 LP |
3760 | char *dn, *t, *u; |
3761 | int r; | |
3762 | ||
3763 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
3764 | * UTF8 chars unescaped */ | |
3765 | ||
383182b5 DR |
3766 | u = unquote(tagvalue, "\"\'"); |
3767 | if (u == NULL) | |
3768 | return NULL; | |
e23a0ce8 | 3769 | |
383182b5 DR |
3770 | t = xescape(u, "/ "); |
3771 | free(u); | |
e23a0ce8 | 3772 | |
383182b5 DR |
3773 | if (t == NULL) |
3774 | return NULL; | |
e23a0ce8 | 3775 | |
383182b5 DR |
3776 | r = asprintf(&dn, "/dev/disk/by-%s/%s", by, t); |
3777 | free(t); | |
e23a0ce8 | 3778 | |
383182b5 DR |
3779 | if (r < 0) |
3780 | return NULL; | |
e23a0ce8 | 3781 | |
383182b5 DR |
3782 | return dn; |
3783 | } | |
e23a0ce8 | 3784 | |
383182b5 | 3785 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3786 | assert(p); |
3787 | ||
383182b5 DR |
3788 | if (startswith(p, "LABEL=")) |
3789 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3790 | |
383182b5 DR |
3791 | if (startswith(p, "UUID=")) |
3792 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3793 | |
84cc2abf DR |
3794 | if (startswith(p, "PARTUUID=")) |
3795 | return tag_to_udev_node(p+9, "partuuid"); | |
3796 | ||
3797 | if (startswith(p, "PARTLABEL=")) | |
3798 | return tag_to_udev_node(p+10, "partlabel"); | |
3799 | ||
e23a0ce8 LP |
3800 | return strdup(p); |
3801 | } | |
3802 | ||
f212ac12 LP |
3803 | bool tty_is_vc(const char *tty) { |
3804 | assert(tty); | |
3805 | ||
3806 | if (startswith(tty, "/dev/")) | |
3807 | tty += 5; | |
3808 | ||
98a28fef LP |
3809 | return vtnr_from_tty(tty) >= 0; |
3810 | } | |
3811 | ||
d1122ad5 LP |
3812 | bool tty_is_console(const char *tty) { |
3813 | assert(tty); | |
3814 | ||
3815 | if (startswith(tty, "/dev/")) | |
3816 | tty += 5; | |
3817 | ||
3818 | return streq(tty, "console"); | |
3819 | } | |
3820 | ||
98a28fef LP |
3821 | int vtnr_from_tty(const char *tty) { |
3822 | int i, r; | |
3823 | ||
3824 | assert(tty); | |
3825 | ||
3826 | if (startswith(tty, "/dev/")) | |
3827 | tty += 5; | |
3828 | ||
3829 | if (!startswith(tty, "tty") ) | |
3830 | return -EINVAL; | |
3831 | ||
3832 | if (tty[3] < '0' || tty[3] > '9') | |
3833 | return -EINVAL; | |
3834 | ||
3835 | r = safe_atoi(tty+3, &i); | |
3836 | if (r < 0) | |
3837 | return r; | |
3838 | ||
3839 | if (i < 0 || i > 63) | |
3840 | return -EINVAL; | |
3841 | ||
3842 | return i; | |
f212ac12 LP |
3843 | } |
3844 | ||
3043935f | 3845 | bool tty_is_vc_resolve(const char *tty) { |
3030ccd7 | 3846 | char *active = NULL; |
3043935f | 3847 | bool b; |
3030ccd7 | 3848 | |
e3aa71c3 LP |
3849 | assert(tty); |
3850 | ||
3851 | if (startswith(tty, "/dev/")) | |
3852 | tty += 5; | |
3853 | ||
3d9a4122 LP |
3854 | /* Resolve where /dev/console is pointing to, if /sys is |
3855 | * actually ours (i.e. not read-only-mounted which is a sign | |
3856 | * for container setups) */ | |
3857 | if (streq(tty, "console") && path_is_read_only_fs("/sys") <= 0) | |
3030ccd7 | 3858 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { |
079a09fb LP |
3859 | /* If multiple log outputs are configured the |
3860 | * last one is what /dev/console points to */ | |
3043935f LP |
3861 | tty = strrchr(active, ' '); |
3862 | if (tty) | |
079a09fb LP |
3863 | tty++; |
3864 | else | |
3865 | tty = active; | |
3030ccd7 LP |
3866 | } |
3867 | ||
3043935f | 3868 | b = tty_is_vc(tty); |
3030ccd7 | 3869 | free(active); |
e3aa71c3 | 3870 | |
3043935f LP |
3871 | return b; |
3872 | } | |
3873 | ||
3874 | const char *default_term_for_tty(const char *tty) { | |
3875 | assert(tty); | |
3876 | ||
acda6a05 | 3877 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
3878 | } |
3879 | ||
87d2c1ff | 3880 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
3881 | assert(de); |
3882 | ||
3883 | if (ignore_file(de->d_name)) | |
3884 | return false; | |
3885 | ||
3886 | if (de->d_type != DT_REG && | |
3887 | de->d_type != DT_LNK && | |
3888 | de->d_type != DT_UNKNOWN) | |
3889 | return false; | |
3890 | ||
3891 | return true; | |
3892 | } | |
3893 | ||
87d2c1ff LP |
3894 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
3895 | assert(de); | |
3896 | ||
a228a22f LP |
3897 | if (de->d_type != DT_REG && |
3898 | de->d_type != DT_LNK && | |
3899 | de->d_type != DT_UNKNOWN) | |
3900 | return false; | |
3901 | ||
3902 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
3903 | return false; |
3904 | ||
3905 | return endswith(de->d_name, suffix); | |
3906 | } | |
3907 | ||
83cc030f LP |
3908 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
3909 | DIR *_d = NULL; | |
3910 | struct dirent *de; | |
3911 | Hashmap *pids = NULL; | |
3912 | ||
3913 | assert(directory); | |
3914 | ||
3915 | /* Executes all binaries in a directory in parallel and waits | |
3916 | * until all they all finished. */ | |
3917 | ||
3918 | if (!d) { | |
3919 | if (!(_d = opendir(directory))) { | |
3920 | ||
3921 | if (errno == ENOENT) | |
3922 | return; | |
3923 | ||
3924 | log_error("Failed to enumerate directory %s: %m", directory); | |
3925 | return; | |
3926 | } | |
3927 | ||
3928 | d = _d; | |
3929 | } | |
3930 | ||
3931 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
3932 | log_error("Failed to allocate set."); | |
3933 | goto finish; | |
3934 | } | |
3935 | ||
3936 | while ((de = readdir(d))) { | |
3937 | char *path; | |
3938 | pid_t pid; | |
3939 | int k; | |
3940 | ||
fb19a739 | 3941 | if (!dirent_is_file(de)) |
83cc030f LP |
3942 | continue; |
3943 | ||
3944 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 3945 | log_oom(); |
83cc030f LP |
3946 | continue; |
3947 | } | |
3948 | ||
3949 | if ((pid = fork()) < 0) { | |
3950 | log_error("Failed to fork: %m"); | |
3951 | free(path); | |
3952 | continue; | |
3953 | } | |
3954 | ||
3955 | if (pid == 0) { | |
3956 | char *_argv[2]; | |
3957 | /* Child */ | |
3958 | ||
3959 | if (!argv) { | |
3960 | _argv[0] = path; | |
3961 | _argv[1] = NULL; | |
3962 | argv = _argv; | |
3963 | } else | |
6edd7d0a | 3964 | argv[0] = path; |
83cc030f LP |
3965 | |
3966 | execv(path, argv); | |
3967 | ||
3968 | log_error("Failed to execute %s: %m", path); | |
3969 | _exit(EXIT_FAILURE); | |
3970 | } | |
3971 | ||
3972 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
3973 | ||
3974 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
3975 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
3976 | free(path); | |
3977 | } | |
3978 | } | |
3979 | ||
3980 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 3981 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
83cc030f LP |
3982 | siginfo_t si; |
3983 | char *path; | |
3984 | ||
3985 | zero(si); | |
ec3f9b53 | 3986 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
3987 | |
3988 | if (errno == EINTR) | |
3989 | continue; | |
3990 | ||
3991 | log_error("waitid() failed: %m"); | |
3992 | goto finish; | |
3993 | } | |
3994 | ||
3995 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 3996 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
3997 | if (si.si_code == CLD_EXITED) |
3998 | log_error("%s exited with exit status %i.", path, si.si_status); | |
3999 | else | |
4000 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
4001 | } else | |
4002 | log_debug("%s exited successfully.", path); | |
4003 | ||
4004 | free(path); | |
4005 | } | |
4006 | } | |
4007 | ||
4008 | finish: | |
4009 | if (_d) | |
4010 | closedir(_d); | |
4011 | ||
4012 | if (pids) | |
4013 | hashmap_free_free(pids); | |
4014 | } | |
4015 | ||
430c18ed LP |
4016 | int kill_and_sigcont(pid_t pid, int sig) { |
4017 | int r; | |
4018 | ||
4019 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4020 | ||
4021 | if (r >= 0) | |
4022 | kill(pid, SIGCONT); | |
4023 | ||
4024 | return r; | |
4025 | } | |
4026 | ||
05feefe0 LP |
4027 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4028 | const char *i; | |
4029 | ||
4030 | if (!nulstr) | |
4031 | return false; | |
4032 | ||
4033 | NULSTR_FOREACH(i, nulstr) | |
4034 | if (streq(i, needle)) | |
4035 | return true; | |
4036 | ||
4037 | return false; | |
4038 | } | |
4039 | ||
6faa1114 | 4040 | bool plymouth_running(void) { |
9408a2d2 | 4041 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4042 | } |
4043 | ||
9beb3f4d LP |
4044 | char* strshorten(char *s, size_t l) { |
4045 | assert(s); | |
4046 | ||
4047 | if (l < strlen(s)) | |
4048 | s[l] = 0; | |
4049 | ||
4050 | return s; | |
4051 | } | |
4052 | ||
4053 | static bool hostname_valid_char(char c) { | |
4054 | return | |
4055 | (c >= 'a' && c <= 'z') || | |
4056 | (c >= 'A' && c <= 'Z') || | |
4057 | (c >= '0' && c <= '9') || | |
4058 | c == '-' || | |
4059 | c == '_' || | |
4060 | c == '.'; | |
4061 | } | |
4062 | ||
4063 | bool hostname_is_valid(const char *s) { | |
4064 | const char *p; | |
4065 | ||
4066 | if (isempty(s)) | |
4067 | return false; | |
4068 | ||
4069 | for (p = s; *p; p++) | |
4070 | if (!hostname_valid_char(*p)) | |
4071 | return false; | |
4072 | ||
4073 | if (p-s > HOST_NAME_MAX) | |
4074 | return false; | |
4075 | ||
4076 | return true; | |
4077 | } | |
4078 | ||
4079 | char* hostname_cleanup(char *s) { | |
4080 | char *p, *d; | |
4081 | ||
4082 | for (p = s, d = s; *p; p++) | |
4083 | if ((*p >= 'a' && *p <= 'z') || | |
4084 | (*p >= 'A' && *p <= 'Z') || | |
4085 | (*p >= '0' && *p <= '9') || | |
4086 | *p == '-' || | |
4087 | *p == '_' || | |
4088 | *p == '.') | |
4089 | *(d++) = *p; | |
4090 | ||
4091 | *d = 0; | |
4092 | ||
4093 | strshorten(s, HOST_NAME_MAX); | |
4094 | return s; | |
4095 | } | |
4096 | ||
1325aa42 LP |
4097 | int pipe_eof(int fd) { |
4098 | struct pollfd pollfd; | |
4099 | int r; | |
4100 | ||
4101 | zero(pollfd); | |
4102 | pollfd.fd = fd; | |
4103 | pollfd.events = POLLIN|POLLHUP; | |
4104 | ||
4105 | r = poll(&pollfd, 1, 0); | |
4106 | if (r < 0) | |
4107 | return -errno; | |
4108 | ||
4109 | if (r == 0) | |
4110 | return 0; | |
4111 | ||
4112 | return pollfd.revents & POLLHUP; | |
4113 | } | |
4114 | ||
8f2d43a0 | 4115 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b LP |
4116 | struct pollfd pollfd; |
4117 | int r; | |
4118 | ||
4119 | zero(pollfd); | |
4120 | pollfd.fd = fd; | |
4121 | pollfd.events = event; | |
4122 | ||
8f2d43a0 | 4123 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
4124 | if (r < 0) |
4125 | return -errno; | |
4126 | ||
4127 | if (r == 0) | |
4128 | return 0; | |
4129 | ||
4130 | return pollfd.revents; | |
4131 | } | |
4132 | ||
5a3ab509 LP |
4133 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4134 | FILE *f; | |
4135 | char *t; | |
4136 | const char *fn; | |
4137 | size_t k; | |
4138 | int fd; | |
4139 | ||
4140 | assert(path); | |
4141 | assert(_f); | |
4142 | assert(_temp_path); | |
4143 | ||
4144 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4145 | if (!t) | |
4146 | return -ENOMEM; | |
4147 | ||
9eb977db | 4148 | fn = path_get_file_name(path); |
5a3ab509 LP |
4149 | k = fn-path; |
4150 | memcpy(t, path, k); | |
4151 | t[k] = '.'; | |
4152 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4153 | ||
4154 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4155 | if (fd < 0) { | |
4156 | free(t); | |
4157 | return -errno; | |
4158 | } | |
4159 | ||
4160 | f = fdopen(fd, "we"); | |
4161 | if (!f) { | |
4162 | unlink(t); | |
4163 | free(t); | |
4164 | return -errno; | |
4165 | } | |
4166 | ||
4167 | *_f = f; | |
4168 | *_temp_path = t; | |
4169 | ||
4170 | return 0; | |
4171 | } | |
4172 | ||
6ea832a2 | 4173 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4174 | assert(fd >= 0); |
4175 | ||
6ea832a2 LP |
4176 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4177 | return -errno; | |
4178 | ||
4179 | return 0; | |
4180 | } | |
4181 | ||
4182 | int terminal_vhangup(const char *name) { | |
4183 | int fd, r; | |
4184 | ||
4185 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4186 | if (fd < 0) | |
4187 | return fd; | |
4188 | ||
4189 | r = terminal_vhangup_fd(fd); | |
4190 | close_nointr_nofail(fd); | |
4191 | ||
4192 | return r; | |
4193 | } | |
4194 | ||
4195 | int vt_disallocate(const char *name) { | |
4196 | int fd, r; | |
4197 | unsigned u; | |
6ea832a2 LP |
4198 | |
4199 | /* Deallocate the VT if possible. If not possible | |
4200 | * (i.e. because it is the active one), at least clear it | |
4201 | * entirely (including the scrollback buffer) */ | |
4202 | ||
b83bc4e9 LP |
4203 | if (!startswith(name, "/dev/")) |
4204 | return -EINVAL; | |
4205 | ||
4206 | if (!tty_is_vc(name)) { | |
4207 | /* So this is not a VT. I guess we cannot deallocate | |
4208 | * it then. But let's at least clear the screen */ | |
4209 | ||
4210 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4211 | if (fd < 0) | |
4212 | return fd; | |
4213 | ||
8585357a LP |
4214 | loop_write(fd, |
4215 | "\033[r" /* clear scrolling region */ | |
4216 | "\033[H" /* move home */ | |
4217 | "\033[2J", /* clear screen */ | |
4218 | 10, false); | |
b83bc4e9 LP |
4219 | close_nointr_nofail(fd); |
4220 | ||
4221 | return 0; | |
4222 | } | |
6ea832a2 LP |
4223 | |
4224 | if (!startswith(name, "/dev/tty")) | |
4225 | return -EINVAL; | |
4226 | ||
4227 | r = safe_atou(name+8, &u); | |
4228 | if (r < 0) | |
4229 | return r; | |
4230 | ||
4231 | if (u <= 0) | |
b83bc4e9 | 4232 | return -EINVAL; |
6ea832a2 | 4233 | |
b83bc4e9 | 4234 | /* Try to deallocate */ |
6ea832a2 LP |
4235 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4236 | if (fd < 0) | |
4237 | return fd; | |
4238 | ||
4239 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4240 | close_nointr_nofail(fd); |
6ea832a2 | 4241 | |
b83bc4e9 LP |
4242 | if (r >= 0) |
4243 | return 0; | |
6ea832a2 | 4244 | |
b83bc4e9 | 4245 | if (errno != EBUSY) |
6ea832a2 | 4246 | return -errno; |
6ea832a2 | 4247 | |
b83bc4e9 LP |
4248 | /* Couldn't deallocate, so let's clear it fully with |
4249 | * scrollback */ | |
4250 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4251 | if (fd < 0) |
b83bc4e9 | 4252 | return fd; |
6ea832a2 | 4253 | |
8585357a LP |
4254 | loop_write(fd, |
4255 | "\033[r" /* clear scrolling region */ | |
4256 | "\033[H" /* move home */ | |
4257 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4258 | 10, false); | |
b83bc4e9 | 4259 | close_nointr_nofail(fd); |
6ea832a2 | 4260 | |
b83bc4e9 | 4261 | return 0; |
6ea832a2 LP |
4262 | } |
4263 | ||
34ca941c LP |
4264 | int copy_file(const char *from, const char *to) { |
4265 | int r, fdf, fdt; | |
4266 | ||
4267 | assert(from); | |
4268 | assert(to); | |
4269 | ||
4270 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4271 | if (fdf < 0) | |
4272 | return -errno; | |
4273 | ||
4274 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
4275 | if (fdt < 0) { | |
4276 | close_nointr_nofail(fdf); | |
4277 | return -errno; | |
4278 | } | |
4279 | ||
4280 | for (;;) { | |
4281 | char buf[PIPE_BUF]; | |
4282 | ssize_t n, k; | |
4283 | ||
4284 | n = read(fdf, buf, sizeof(buf)); | |
4285 | if (n < 0) { | |
4286 | r = -errno; | |
4287 | ||
4288 | close_nointr_nofail(fdf); | |
4289 | close_nointr(fdt); | |
4290 | unlink(to); | |
4291 | ||
4292 | return r; | |
4293 | } | |
4294 | ||
4295 | if (n == 0) | |
4296 | break; | |
4297 | ||
4298 | errno = 0; | |
4299 | k = loop_write(fdt, buf, n, false); | |
4300 | if (n != k) { | |
4301 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4302 | ||
4303 | close_nointr_nofail(fdf); | |
4304 | close_nointr(fdt); | |
4305 | ||
4306 | unlink(to); | |
4307 | return r; | |
4308 | } | |
4309 | } | |
4310 | ||
4311 | close_nointr_nofail(fdf); | |
4312 | r = close_nointr(fdt); | |
4313 | ||
4314 | if (r < 0) { | |
4315 | unlink(to); | |
4316 | return r; | |
4317 | } | |
4318 | ||
4319 | return 0; | |
4320 | } | |
4321 | ||
424a19f8 LP |
4322 | int symlink_atomic(const char *from, const char *to) { |
4323 | char *x; | |
4324 | _cleanup_free_ char *t; | |
34ca941c LP |
4325 | const char *fn; |
4326 | size_t k; | |
4327 | unsigned long long ull; | |
4328 | unsigned i; | |
4329 | int r; | |
4330 | ||
4331 | assert(from); | |
4332 | assert(to); | |
4333 | ||
4334 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4335 | if (!t) | |
4336 | return -ENOMEM; | |
4337 | ||
9eb977db | 4338 | fn = path_get_file_name(to); |
34ca941c LP |
4339 | k = fn-to; |
4340 | memcpy(t, to, k); | |
4341 | t[k] = '.'; | |
4342 | x = stpcpy(t+k+1, fn); | |
4343 | ||
4344 | ull = random_ull(); | |
4345 | for (i = 0; i < 16; i++) { | |
4346 | *(x++) = hexchar(ull & 0xF); | |
4347 | ull >>= 4; | |
4348 | } | |
4349 | ||
4350 | *x = 0; | |
4351 | ||
424a19f8 LP |
4352 | if (symlink(from, t) < 0) |
4353 | return -errno; | |
34ca941c LP |
4354 | |
4355 | if (rename(t, to) < 0) { | |
4356 | r = -errno; | |
4357 | unlink(t); | |
34ca941c LP |
4358 | return r; |
4359 | } | |
4360 | ||
424a19f8 | 4361 | return 0; |
34ca941c LP |
4362 | } |
4363 | ||
4d6d6518 LP |
4364 | bool display_is_local(const char *display) { |
4365 | assert(display); | |
4366 | ||
4367 | return | |
4368 | display[0] == ':' && | |
4369 | display[1] >= '0' && | |
4370 | display[1] <= '9'; | |
4371 | } | |
4372 | ||
4373 | int socket_from_display(const char *display, char **path) { | |
4374 | size_t k; | |
4375 | char *f, *c; | |
4376 | ||
4377 | assert(display); | |
4378 | assert(path); | |
4379 | ||
4380 | if (!display_is_local(display)) | |
4381 | return -EINVAL; | |
4382 | ||
4383 | k = strspn(display+1, "0123456789"); | |
4384 | ||
4385 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4386 | if (!f) | |
4387 | return -ENOMEM; | |
4388 | ||
4389 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4390 | memcpy(c, display+1, k); | |
4391 | c[k] = 0; | |
4392 | ||
4393 | *path = f; | |
4394 | ||
4395 | return 0; | |
4396 | } | |
4397 | ||
d05c5031 LP |
4398 | int get_user_creds( |
4399 | const char **username, | |
4400 | uid_t *uid, gid_t *gid, | |
4401 | const char **home, | |
4402 | const char **shell) { | |
4403 | ||
1cccf435 | 4404 | struct passwd *p; |
ddd88763 | 4405 | uid_t u; |
1cccf435 MV |
4406 | |
4407 | assert(username); | |
4408 | assert(*username); | |
1cccf435 MV |
4409 | |
4410 | /* We enforce some special rules for uid=0: in order to avoid | |
4411 | * NSS lookups for root we hardcode its data. */ | |
4412 | ||
4413 | if (streq(*username, "root") || streq(*username, "0")) { | |
4414 | *username = "root"; | |
4b67834e LP |
4415 | |
4416 | if (uid) | |
4417 | *uid = 0; | |
4418 | ||
4419 | if (gid) | |
4420 | *gid = 0; | |
4421 | ||
4422 | if (home) | |
4423 | *home = "/root"; | |
d05c5031 LP |
4424 | |
4425 | if (shell) | |
4426 | *shell = "/bin/sh"; | |
4427 | ||
1cccf435 MV |
4428 | return 0; |
4429 | } | |
4430 | ||
ddd88763 | 4431 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4432 | errno = 0; |
ddd88763 | 4433 | p = getpwuid(u); |
1cccf435 MV |
4434 | |
4435 | /* If there are multiple users with the same id, make | |
4436 | * sure to leave $USER to the configured value instead | |
4437 | * of the first occurrence in the database. However if | |
4438 | * the uid was configured by a numeric uid, then let's | |
4439 | * pick the real username from /etc/passwd. */ | |
4440 | if (p) | |
4441 | *username = p->pw_name; | |
4442 | } else { | |
4443 | errno = 0; | |
4444 | p = getpwnam(*username); | |
4445 | } | |
4446 | ||
4447 | if (!p) | |
4448 | return errno != 0 ? -errno : -ESRCH; | |
4449 | ||
4b67834e LP |
4450 | if (uid) |
4451 | *uid = p->pw_uid; | |
4452 | ||
4453 | if (gid) | |
4454 | *gid = p->pw_gid; | |
4455 | ||
4456 | if (home) | |
4457 | *home = p->pw_dir; | |
4458 | ||
d05c5031 LP |
4459 | if (shell) |
4460 | *shell = p->pw_shell; | |
4461 | ||
4b67834e LP |
4462 | return 0; |
4463 | } | |
4464 | ||
59164be4 LP |
4465 | char* uid_to_name(uid_t uid) { |
4466 | struct passwd *p; | |
4467 | char *r; | |
4468 | ||
4469 | if (uid == 0) | |
4470 | return strdup("root"); | |
4471 | ||
4472 | p = getpwuid(uid); | |
4473 | if (p) | |
4474 | return strdup(p->pw_name); | |
4475 | ||
4476 | if (asprintf(&r, "%lu", (unsigned long) uid) < 0) | |
4477 | return NULL; | |
4478 | ||
4479 | return r; | |
4480 | } | |
4481 | ||
4b67834e LP |
4482 | int get_group_creds(const char **groupname, gid_t *gid) { |
4483 | struct group *g; | |
4484 | gid_t id; | |
4485 | ||
4486 | assert(groupname); | |
4487 | ||
4488 | /* We enforce some special rules for gid=0: in order to avoid | |
4489 | * NSS lookups for root we hardcode its data. */ | |
4490 | ||
4491 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4492 | *groupname = "root"; | |
4493 | ||
4494 | if (gid) | |
4495 | *gid = 0; | |
4496 | ||
4497 | return 0; | |
4498 | } | |
4499 | ||
4500 | if (parse_gid(*groupname, &id) >= 0) { | |
4501 | errno = 0; | |
4502 | g = getgrgid(id); | |
4503 | ||
4504 | if (g) | |
4505 | *groupname = g->gr_name; | |
4506 | } else { | |
4507 | errno = 0; | |
4508 | g = getgrnam(*groupname); | |
4509 | } | |
4510 | ||
4511 | if (!g) | |
4512 | return errno != 0 ? -errno : -ESRCH; | |
4513 | ||
4514 | if (gid) | |
4515 | *gid = g->gr_gid; | |
4516 | ||
1cccf435 MV |
4517 | return 0; |
4518 | } | |
4519 | ||
43673799 LP |
4520 | int in_group(const char *name) { |
4521 | gid_t gid, *gids; | |
4522 | int ngroups_max, r, i; | |
4523 | ||
4524 | r = get_group_creds(&name, &gid); | |
4525 | if (r < 0) | |
4526 | return r; | |
4527 | ||
4528 | if (getgid() == gid) | |
4529 | return 1; | |
4530 | ||
4531 | if (getegid() == gid) | |
4532 | return 1; | |
4533 | ||
4534 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4535 | assert(ngroups_max > 0); | |
4536 | ||
4537 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4538 | ||
4539 | r = getgroups(ngroups_max, gids); | |
4540 | if (r < 0) | |
4541 | return -errno; | |
4542 | ||
4543 | for (i = 0; i < r; i++) | |
4544 | if (gids[i] == gid) | |
4545 | return 1; | |
4546 | ||
4547 | return 0; | |
4548 | } | |
4549 | ||
8092a428 LP |
4550 | int glob_exists(const char *path) { |
4551 | glob_t g; | |
4552 | int r, k; | |
4553 | ||
4554 | assert(path); | |
4555 | ||
4556 | zero(g); | |
4557 | errno = 0; | |
4558 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4559 | ||
4560 | if (k == GLOB_NOMATCH) | |
4561 | r = 0; | |
4562 | else if (k == GLOB_NOSPACE) | |
4563 | r = -ENOMEM; | |
4564 | else if (k == 0) | |
4565 | r = !strv_isempty(g.gl_pathv); | |
4566 | else | |
4567 | r = errno ? -errno : -EIO; | |
4568 | ||
4569 | globfree(&g); | |
4570 | ||
4571 | return r; | |
4572 | } | |
4573 | ||
83096483 LP |
4574 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4575 | struct stat st; | |
4576 | ||
4577 | assert(d); | |
4578 | assert(de); | |
4579 | ||
4580 | if (de->d_type != DT_UNKNOWN) | |
4581 | return 0; | |
4582 | ||
4583 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4584 | return -errno; | |
4585 | ||
4586 | de->d_type = | |
4587 | S_ISREG(st.st_mode) ? DT_REG : | |
4588 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4589 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4590 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4591 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4592 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4593 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4594 | DT_UNKNOWN; | |
4595 | ||
4596 | return 0; | |
4597 | } | |
4598 | ||
4599 | int in_search_path(const char *path, char **search) { | |
4600 | char **i, *parent; | |
4601 | int r; | |
4602 | ||
9eb977db | 4603 | r = path_get_parent(path, &parent); |
83096483 LP |
4604 | if (r < 0) |
4605 | return r; | |
4606 | ||
4607 | r = 0; | |
4608 | ||
4609 | STRV_FOREACH(i, search) { | |
4610 | if (path_equal(parent, *i)) { | |
4611 | r = 1; | |
4612 | break; | |
4613 | } | |
4614 | } | |
4615 | ||
4616 | free(parent); | |
4617 | ||
4618 | return r; | |
4619 | } | |
4620 | ||
034a2a52 LP |
4621 | int get_files_in_directory(const char *path, char ***list) { |
4622 | DIR *d; | |
4623 | int r = 0; | |
4624 | unsigned n = 0; | |
4625 | char **l = NULL; | |
4626 | ||
4627 | assert(path); | |
d60ef526 LP |
4628 | |
4629 | /* Returns all files in a directory in *list, and the number | |
4630 | * of files as return value. If list is NULL returns only the | |
4631 | * number */ | |
034a2a52 LP |
4632 | |
4633 | d = opendir(path); | |
8ea913b2 LP |
4634 | if (!d) |
4635 | return -errno; | |
4636 | ||
034a2a52 | 4637 | for (;;) { |
7d5e9c0f LP |
4638 | struct dirent *de; |
4639 | union dirent_storage buf; | |
034a2a52 LP |
4640 | int k; |
4641 | ||
7d5e9c0f | 4642 | k = readdir_r(d, &buf.de, &de); |
034a2a52 LP |
4643 | if (k != 0) { |
4644 | r = -k; | |
4645 | goto finish; | |
4646 | } | |
4647 | ||
4648 | if (!de) | |
4649 | break; | |
4650 | ||
4651 | dirent_ensure_type(d, de); | |
4652 | ||
4653 | if (!dirent_is_file(de)) | |
4654 | continue; | |
4655 | ||
d60ef526 LP |
4656 | if (list) { |
4657 | if ((unsigned) r >= n) { | |
4658 | char **t; | |
034a2a52 | 4659 | |
d60ef526 LP |
4660 | n = MAX(16, 2*r); |
4661 | t = realloc(l, sizeof(char*) * n); | |
4662 | if (!t) { | |
4663 | r = -ENOMEM; | |
4664 | goto finish; | |
4665 | } | |
034a2a52 | 4666 | |
d60ef526 LP |
4667 | l = t; |
4668 | } | |
034a2a52 | 4669 | |
d60ef526 | 4670 | assert((unsigned) r < n); |
034a2a52 | 4671 | |
d60ef526 LP |
4672 | l[r] = strdup(de->d_name); |
4673 | if (!l[r]) { | |
4674 | r = -ENOMEM; | |
4675 | goto finish; | |
4676 | } | |
034a2a52 | 4677 | |
d60ef526 LP |
4678 | l[++r] = NULL; |
4679 | } else | |
4680 | r++; | |
034a2a52 LP |
4681 | } |
4682 | ||
4683 | finish: | |
4684 | if (d) | |
4685 | closedir(d); | |
4686 | ||
d60ef526 LP |
4687 | if (r >= 0) { |
4688 | if (list) | |
4689 | *list = l; | |
4690 | } else | |
034a2a52 LP |
4691 | strv_free(l); |
4692 | ||
4693 | return r; | |
4694 | } | |
4695 | ||
b7def684 | 4696 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4697 | va_list ap; |
4698 | size_t l; | |
4699 | char *r, *p; | |
4700 | ||
4701 | va_start(ap, x); | |
4702 | ||
4703 | if (x) { | |
4704 | l = strlen(x); | |
4705 | ||
4706 | for (;;) { | |
4707 | const char *t; | |
040f18ea | 4708 | size_t n; |
911a4828 LP |
4709 | |
4710 | t = va_arg(ap, const char *); | |
4711 | if (!t) | |
4712 | break; | |
4713 | ||
040f18ea | 4714 | n = strlen(t); |
e98055de LN |
4715 | if (n > ((size_t) -1) - l) { |
4716 | va_end(ap); | |
040f18ea | 4717 | return NULL; |
e98055de | 4718 | } |
040f18ea LP |
4719 | |
4720 | l += n; | |
911a4828 LP |
4721 | } |
4722 | } else | |
4723 | l = 0; | |
4724 | ||
4725 | va_end(ap); | |
4726 | ||
4727 | r = new(char, l+1); | |
4728 | if (!r) | |
4729 | return NULL; | |
4730 | ||
4731 | if (x) { | |
4732 | p = stpcpy(r, x); | |
4733 | ||
4734 | va_start(ap, x); | |
4735 | ||
4736 | for (;;) { | |
4737 | const char *t; | |
4738 | ||
4739 | t = va_arg(ap, const char *); | |
4740 | if (!t) | |
4741 | break; | |
4742 | ||
4743 | p = stpcpy(p, t); | |
4744 | } | |
8ea913b2 LP |
4745 | |
4746 | va_end(ap); | |
911a4828 LP |
4747 | } else |
4748 | r[0] = 0; | |
4749 | ||
4750 | return r; | |
4751 | } | |
4752 | ||
b636465b LP |
4753 | bool is_main_thread(void) { |
4754 | static __thread int cached = 0; | |
4755 | ||
4756 | if (_unlikely_(cached == 0)) | |
4757 | cached = getpid() == gettid() ? 1 : -1; | |
4758 | ||
4759 | return cached > 0; | |
4760 | } | |
4761 | ||
94959f0f LP |
4762 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4763 | char *p, *s; | |
4764 | int r; | |
4765 | unsigned n, m; | |
4766 | ||
4767 | assert(ret); | |
4768 | ||
4769 | /* If it has a queue this is good enough for us */ | |
4770 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4771 | return -ENOMEM; | |
4772 | ||
4773 | r = access(p, F_OK); | |
4774 | free(p); | |
4775 | ||
4776 | if (r >= 0) { | |
4777 | *ret = d; | |
4778 | return 0; | |
4779 | } | |
4780 | ||
4781 | /* If it is a partition find the originating device */ | |
4782 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4783 | return -ENOMEM; | |
4784 | ||
4785 | r = access(p, F_OK); | |
4786 | free(p); | |
4787 | ||
4788 | if (r < 0) | |
4789 | return -ENOENT; | |
4790 | ||
4791 | /* Get parent dev_t */ | |
4792 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4793 | return -ENOMEM; | |
4794 | ||
4795 | r = read_one_line_file(p, &s); | |
4796 | free(p); | |
4797 | ||
4798 | if (r < 0) | |
4799 | return r; | |
4800 | ||
4801 | r = sscanf(s, "%u:%u", &m, &n); | |
4802 | free(s); | |
4803 | ||
4804 | if (r != 2) | |
4805 | return -EINVAL; | |
4806 | ||
4807 | /* Only return this if it is really good enough for us. */ | |
4808 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4809 | return -ENOMEM; | |
4810 | ||
4811 | r = access(p, F_OK); | |
4812 | free(p); | |
4813 | ||
4814 | if (r >= 0) { | |
4815 | *ret = makedev(m, n); | |
4816 | return 0; | |
4817 | } | |
4818 | ||
4819 | return -ENOENT; | |
4820 | } | |
4821 | ||
8d53b453 | 4822 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
4823 | struct stat st; |
4824 | ||
4825 | assert(p); | |
4826 | ||
4827 | if (lstat(p, &st) < 0) | |
4828 | return -errno; | |
4829 | ||
4830 | return | |
8d53b453 | 4831 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
4832 | (st.st_mode & S_ISVTX); |
4833 | } | |
94959f0f | 4834 | |
f41607a6 LP |
4835 | static const char *const ioprio_class_table[] = { |
4836 | [IOPRIO_CLASS_NONE] = "none", | |
4837 | [IOPRIO_CLASS_RT] = "realtime", | |
4838 | [IOPRIO_CLASS_BE] = "best-effort", | |
4839 | [IOPRIO_CLASS_IDLE] = "idle" | |
4840 | }; | |
4841 | ||
f8b69d1d | 4842 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
4843 | |
4844 | static const char *const sigchld_code_table[] = { | |
4845 | [CLD_EXITED] = "exited", | |
4846 | [CLD_KILLED] = "killed", | |
4847 | [CLD_DUMPED] = "dumped", | |
4848 | [CLD_TRAPPED] = "trapped", | |
4849 | [CLD_STOPPED] = "stopped", | |
4850 | [CLD_CONTINUED] = "continued", | |
4851 | }; | |
4852 | ||
4853 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
4854 | ||
4855 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
4856 | [LOG_FAC(LOG_KERN)] = "kern", | |
4857 | [LOG_FAC(LOG_USER)] = "user", | |
4858 | [LOG_FAC(LOG_MAIL)] = "mail", | |
4859 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
4860 | [LOG_FAC(LOG_AUTH)] = "auth", | |
4861 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
4862 | [LOG_FAC(LOG_LPR)] = "lpr", | |
4863 | [LOG_FAC(LOG_NEWS)] = "news", | |
4864 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
4865 | [LOG_FAC(LOG_CRON)] = "cron", | |
4866 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
4867 | [LOG_FAC(LOG_FTP)] = "ftp", | |
4868 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
4869 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
4870 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
4871 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
4872 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
4873 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
4874 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
4875 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
4876 | }; | |
4877 | ||
f8b69d1d | 4878 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
4879 | |
4880 | static const char *const log_level_table[] = { | |
4881 | [LOG_EMERG] = "emerg", | |
4882 | [LOG_ALERT] = "alert", | |
4883 | [LOG_CRIT] = "crit", | |
4884 | [LOG_ERR] = "err", | |
4885 | [LOG_WARNING] = "warning", | |
4886 | [LOG_NOTICE] = "notice", | |
4887 | [LOG_INFO] = "info", | |
4888 | [LOG_DEBUG] = "debug" | |
4889 | }; | |
4890 | ||
f8b69d1d | 4891 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
4892 | |
4893 | static const char* const sched_policy_table[] = { | |
4894 | [SCHED_OTHER] = "other", | |
4895 | [SCHED_BATCH] = "batch", | |
4896 | [SCHED_IDLE] = "idle", | |
4897 | [SCHED_FIFO] = "fifo", | |
4898 | [SCHED_RR] = "rr" | |
4899 | }; | |
4900 | ||
f8b69d1d | 4901 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 LP |
4902 | |
4903 | static const char* const rlimit_table[] = { | |
4904 | [RLIMIT_CPU] = "LimitCPU", | |
4905 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
4906 | [RLIMIT_DATA] = "LimitDATA", | |
4907 | [RLIMIT_STACK] = "LimitSTACK", | |
4908 | [RLIMIT_CORE] = "LimitCORE", | |
4909 | [RLIMIT_RSS] = "LimitRSS", | |
4910 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
4911 | [RLIMIT_AS] = "LimitAS", | |
4912 | [RLIMIT_NPROC] = "LimitNPROC", | |
4913 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
4914 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
4915 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
4916 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
4917 | [RLIMIT_NICE] = "LimitNICE", | |
4918 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
4919 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
4920 | }; | |
4921 | ||
4922 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4923 | ||
4924 | static const char* const ip_tos_table[] = { | |
4925 | [IPTOS_LOWDELAY] = "low-delay", | |
4926 | [IPTOS_THROUGHPUT] = "throughput", | |
4927 | [IPTOS_RELIABILITY] = "reliability", | |
4928 | [IPTOS_LOWCOST] = "low-cost", | |
4929 | }; | |
4930 | ||
f8b69d1d | 4931 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 4932 | |
4e240ab0 | 4933 | static const char *const __signal_table[] = { |
f41607a6 LP |
4934 | [SIGHUP] = "HUP", |
4935 | [SIGINT] = "INT", | |
4936 | [SIGQUIT] = "QUIT", | |
4937 | [SIGILL] = "ILL", | |
4938 | [SIGTRAP] = "TRAP", | |
4939 | [SIGABRT] = "ABRT", | |
4940 | [SIGBUS] = "BUS", | |
4941 | [SIGFPE] = "FPE", | |
4942 | [SIGKILL] = "KILL", | |
4943 | [SIGUSR1] = "USR1", | |
4944 | [SIGSEGV] = "SEGV", | |
4945 | [SIGUSR2] = "USR2", | |
4946 | [SIGPIPE] = "PIPE", | |
4947 | [SIGALRM] = "ALRM", | |
4948 | [SIGTERM] = "TERM", | |
4949 | #ifdef SIGSTKFLT | |
4950 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
4951 | #endif | |
4952 | [SIGCHLD] = "CHLD", | |
4953 | [SIGCONT] = "CONT", | |
4954 | [SIGSTOP] = "STOP", | |
4955 | [SIGTSTP] = "TSTP", | |
4956 | [SIGTTIN] = "TTIN", | |
4957 | [SIGTTOU] = "TTOU", | |
4958 | [SIGURG] = "URG", | |
4959 | [SIGXCPU] = "XCPU", | |
4960 | [SIGXFSZ] = "XFSZ", | |
4961 | [SIGVTALRM] = "VTALRM", | |
4962 | [SIGPROF] = "PROF", | |
4963 | [SIGWINCH] = "WINCH", | |
4964 | [SIGIO] = "IO", | |
4965 | [SIGPWR] = "PWR", | |
4966 | [SIGSYS] = "SYS" | |
4967 | }; | |
4968 | ||
4e240ab0 MS |
4969 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
4970 | ||
4971 | const char *signal_to_string(int signo) { | |
4972 | static __thread char buf[12]; | |
4973 | const char *name; | |
4974 | ||
4975 | name = __signal_to_string(signo); | |
4976 | if (name) | |
4977 | return name; | |
4978 | ||
4979 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
4980 | snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN); | |
4981 | else | |
4982 | snprintf(buf, sizeof(buf) - 1, "%d", signo); | |
4983 | char_array_0(buf); | |
4984 | return buf; | |
4985 | } | |
4986 | ||
4987 | int signal_from_string(const char *s) { | |
4988 | int signo; | |
4989 | int offset = 0; | |
4990 | unsigned u; | |
4991 | ||
040f18ea | 4992 | signo = __signal_from_string(s); |
4e240ab0 MS |
4993 | if (signo > 0) |
4994 | return signo; | |
4995 | ||
4996 | if (startswith(s, "RTMIN+")) { | |
4997 | s += 6; | |
4998 | offset = SIGRTMIN; | |
4999 | } | |
5000 | if (safe_atou(s, &u) >= 0) { | |
5001 | signo = (int) u + offset; | |
5002 | if (signo > 0 && signo < _NSIG) | |
5003 | return signo; | |
5004 | } | |
5005 | return -1; | |
5006 | } | |
65457142 FC |
5007 | |
5008 | bool kexec_loaded(void) { | |
5009 | bool loaded = false; | |
5010 | char *s; | |
5011 | ||
5012 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
5013 | if (s[0] == '1') | |
5014 | loaded = true; | |
5015 | free(s); | |
5016 | } | |
5017 | return loaded; | |
5018 | } | |
fb9de93d LP |
5019 | |
5020 | int strdup_or_null(const char *a, char **b) { | |
5021 | char *c; | |
5022 | ||
5023 | assert(b); | |
5024 | ||
5025 | if (!a) { | |
5026 | *b = NULL; | |
5027 | return 0; | |
5028 | } | |
5029 | ||
5030 | c = strdup(a); | |
5031 | if (!c) | |
5032 | return -ENOMEM; | |
5033 | ||
5034 | *b = c; | |
5035 | return 0; | |
5036 | } | |
64685e0c | 5037 | |
87d2c1ff LP |
5038 | int prot_from_flags(int flags) { |
5039 | ||
5040 | switch (flags & O_ACCMODE) { | |
5041 | ||
5042 | case O_RDONLY: | |
5043 | return PROT_READ; | |
5044 | ||
5045 | case O_WRONLY: | |
5046 | return PROT_WRITE; | |
5047 | ||
5048 | case O_RDWR: | |
5049 | return PROT_READ|PROT_WRITE; | |
5050 | ||
5051 | default: | |
5052 | return -EINVAL; | |
5053 | } | |
7c99e0c1 | 5054 | } |
689b9a22 | 5055 | |
babfc091 | 5056 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 5057 | unsigned i; |
babfc091 LP |
5058 | |
5059 | static const struct { | |
5060 | const char *suffix; | |
5061 | off_t factor; | |
5062 | } table[] = { | |
32895bb3 LP |
5063 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
5064 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
5065 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
5066 | { "G", 1024ULL*1024ULL*1024ULL }, | |
5067 | { "M", 1024ULL*1024ULL }, | |
5068 | { "K", 1024ULL }, | |
5069 | }; | |
5070 | ||
5071 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
5072 | ||
5073 | if (t >= table[i].factor) { | |
5074 | snprintf(buf, l, | |
5075 | "%llu.%llu%s", | |
5076 | (unsigned long long) (t / table[i].factor), | |
5077 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
5078 | table[i].suffix); | |
5079 | ||
5080 | goto finish; | |
5081 | } | |
5082 | } | |
5083 | ||
5084 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
5085 | ||
5086 | finish: | |
5087 | buf[l-1] = 0; | |
5088 | return buf; | |
5089 | ||
5090 | } | |
55d7bfc1 LP |
5091 | |
5092 | void* memdup(const void *p, size_t l) { | |
5093 | void *r; | |
5094 | ||
5095 | assert(p); | |
5096 | ||
5097 | r = malloc(l); | |
5098 | if (!r) | |
5099 | return NULL; | |
5100 | ||
5101 | memcpy(r, p, l); | |
5102 | return r; | |
5103 | } | |
bb99a35a LP |
5104 | |
5105 | int fd_inc_sndbuf(int fd, size_t n) { | |
5106 | int r, value; | |
5107 | socklen_t l = sizeof(value); | |
5108 | ||
5109 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
5110 | if (r >= 0 && | |
5111 | l == sizeof(value) && | |
5112 | (size_t) value >= n*2) | |
5113 | return 0; | |
5114 | ||
5115 | value = (int) n; | |
5116 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
5117 | if (r < 0) | |
5118 | return -errno; | |
5119 | ||
5120 | return 1; | |
5121 | } | |
5122 | ||
5123 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5124 | int r, value; | |
5125 | socklen_t l = sizeof(value); | |
5126 | ||
5127 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
5128 | if (r >= 0 && | |
5129 | l == sizeof(value) && | |
5130 | (size_t) value >= n*2) | |
5131 | return 0; | |
5132 | ||
5133 | value = (int) n; | |
5134 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
5135 | if (r < 0) | |
5136 | return -errno; | |
5137 | ||
5138 | return 1; | |
5139 | } | |
6bb92a16 | 5140 | |
9bdc770c | 5141 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
5142 | pid_t parent_pid, agent_pid; |
5143 | int fd; | |
5144 | bool stdout_is_tty, stderr_is_tty; | |
5145 | unsigned n, i; | |
5146 | va_list ap; | |
5147 | char **l; | |
5148 | ||
5149 | assert(pid); | |
5150 | assert(path); | |
5151 | ||
5152 | parent_pid = getpid(); | |
5153 | ||
5154 | /* Spawns a temporary TTY agent, making sure it goes away when | |
5155 | * we go away */ | |
5156 | ||
5157 | agent_pid = fork(); | |
5158 | if (agent_pid < 0) | |
5159 | return -errno; | |
5160 | ||
5161 | if (agent_pid != 0) { | |
5162 | *pid = agent_pid; | |
5163 | return 0; | |
5164 | } | |
5165 | ||
5166 | /* In the child: | |
5167 | * | |
5168 | * Make sure the agent goes away when the parent dies */ | |
5169 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5170 | _exit(EXIT_FAILURE); | |
5171 | ||
5172 | /* Check whether our parent died before we were able | |
5173 | * to set the death signal */ | |
5174 | if (getppid() != parent_pid) | |
5175 | _exit(EXIT_SUCCESS); | |
5176 | ||
5177 | /* Don't leak fds to the agent */ | |
9bdc770c | 5178 | close_all_fds(except, n_except); |
6bb92a16 LP |
5179 | |
5180 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5181 | stderr_is_tty = isatty(STDERR_FILENO); | |
5182 | ||
5183 | if (!stdout_is_tty || !stderr_is_tty) { | |
5184 | /* Detach from stdout/stderr. and reopen | |
5185 | * /dev/tty for them. This is important to | |
5186 | * ensure that when systemctl is started via | |
5187 | * popen() or a similar call that expects to | |
5188 | * read EOF we actually do generate EOF and | |
5189 | * not delay this indefinitely by because we | |
5190 | * keep an unused copy of stdin around. */ | |
5191 | fd = open("/dev/tty", O_WRONLY); | |
5192 | if (fd < 0) { | |
5193 | log_error("Failed to open /dev/tty: %m"); | |
5194 | _exit(EXIT_FAILURE); | |
5195 | } | |
5196 | ||
5197 | if (!stdout_is_tty) | |
5198 | dup2(fd, STDOUT_FILENO); | |
5199 | ||
5200 | if (!stderr_is_tty) | |
5201 | dup2(fd, STDERR_FILENO); | |
5202 | ||
5203 | if (fd > 2) | |
5204 | close(fd); | |
5205 | } | |
5206 | ||
5207 | /* Count arguments */ | |
5208 | va_start(ap, path); | |
5209 | for (n = 0; va_arg(ap, char*); n++) | |
5210 | ; | |
5211 | va_end(ap); | |
5212 | ||
5213 | /* Allocate strv */ | |
5214 | l = alloca(sizeof(char *) * (n + 1)); | |
5215 | ||
5216 | /* Fill in arguments */ | |
5217 | va_start(ap, path); | |
5218 | for (i = 0; i <= n; i++) | |
5219 | l[i] = va_arg(ap, char*); | |
5220 | va_end(ap); | |
5221 | ||
5222 | execv(path, l); | |
5223 | _exit(EXIT_FAILURE); | |
5224 | } | |
68faf98c LP |
5225 | |
5226 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5227 | struct rlimit highest, fixed; | |
5228 | ||
5229 | assert(rlim); | |
5230 | ||
5231 | if (setrlimit(resource, rlim) >= 0) | |
5232 | return 0; | |
5233 | ||
5234 | if (errno != EPERM) | |
5235 | return -errno; | |
5236 | ||
5237 | /* So we failed to set the desired setrlimit, then let's try | |
5238 | * to get as close as we can */ | |
5239 | assert_se(getrlimit(resource, &highest) == 0); | |
5240 | ||
5241 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5242 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5243 | ||
5244 | if (setrlimit(resource, &fixed) < 0) | |
5245 | return -errno; | |
5246 | ||
5247 | return 0; | |
5248 | } | |
3d9a4122 | 5249 | |
ab94af92 LP |
5250 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
5251 | char path[sizeof("/proc/")-1+10+sizeof("/environ")], *value = NULL; | |
5252 | int r; | |
5253 | FILE *f; | |
5254 | bool done = false; | |
5255 | size_t l; | |
5256 | ||
5257 | assert(field); | |
5258 | assert(_value); | |
5259 | ||
5260 | if (pid == 0) | |
5261 | pid = getpid(); | |
5262 | ||
5263 | snprintf(path, sizeof(path), "/proc/%lu/environ", (unsigned long) pid); | |
5264 | char_array_0(path); | |
5265 | ||
5266 | f = fopen(path, "re"); | |
5267 | if (!f) | |
5268 | return -errno; | |
5269 | ||
5270 | l = strlen(field); | |
5271 | r = 0; | |
5272 | ||
5273 | do { | |
5274 | char line[LINE_MAX]; | |
5275 | unsigned i; | |
5276 | ||
5277 | for (i = 0; i < sizeof(line)-1; i++) { | |
5278 | int c; | |
5279 | ||
5280 | c = getc(f); | |
5281 | if (_unlikely_(c == EOF)) { | |
5282 | done = true; | |
5283 | break; | |
5284 | } else if (c == 0) | |
5285 | break; | |
5286 | ||
5287 | line[i] = c; | |
5288 | } | |
5289 | line[i] = 0; | |
5290 | ||
5291 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5292 | value = strdup(line + l + 1); | |
5293 | if (!value) { | |
5294 | r = -ENOMEM; | |
5295 | break; | |
5296 | } | |
5297 | ||
5298 | r = 1; | |
5299 | break; | |
5300 | } | |
5301 | ||
5302 | } while (!done); | |
5303 | ||
5304 | fclose(f); | |
5305 | ||
5306 | if (r >= 0) | |
5307 | *_value = value; | |
5308 | ||
5309 | return r; | |
5310 | } | |
d889a206 LP |
5311 | |
5312 | int can_sleep(const char *type) { | |
e67f47e5 | 5313 | char *w, *state; |
d889a206 | 5314 | size_t l, k; |
d889a206 | 5315 | int r; |
e67f47e5 | 5316 | _cleanup_free_ char *p = NULL; |
d889a206 LP |
5317 | |
5318 | assert(type); | |
5319 | ||
679b7d79 LP |
5320 | /* If /sys is read-only we cannot sleep */ |
5321 | if (access("/sys/power/state", W_OK) < 0) | |
5322 | return false; | |
5323 | ||
d889a206 LP |
5324 | r = read_one_line_file("/sys/power/state", &p); |
5325 | if (r < 0) | |
679b7d79 | 5326 | return false; |
d889a206 LP |
5327 | |
5328 | k = strlen(type); | |
e67f47e5 LP |
5329 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) |
5330 | if (l == k && memcmp(w, type, l) == 0) | |
5331 | return true; | |
d889a206 | 5332 | |
e67f47e5 | 5333 | return false; |
d889a206 | 5334 | } |
49dbfa7b | 5335 | |
6524990f LP |
5336 | int can_sleep_disk(const char *type) { |
5337 | char *w, *state; | |
5338 | size_t l, k; | |
5339 | int r; | |
5340 | _cleanup_free_ char *p = NULL; | |
5341 | ||
5342 | assert(type); | |
5343 | ||
679b7d79 LP |
5344 | /* If /sys is read-only we cannot sleep */ |
5345 | if (access("/sys/power/state", W_OK) < 0 || | |
5346 | access("/sys/power/disk", W_OK) < 0) | |
5347 | return false; | |
5348 | ||
6524990f LP |
5349 | r = read_one_line_file("/sys/power/disk", &p); |
5350 | if (r < 0) | |
679b7d79 | 5351 | return false; |
6524990f LP |
5352 | |
5353 | k = strlen(type); | |
5354 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) { | |
5355 | if (l == k && memcmp(w, type, l) == 0) | |
5356 | return true; | |
5357 | ||
5358 | if (l == k + 2 && w[0] == '[' && memcmp(w + 1, type, l - 2) == 0 && w[l-1] == ']') | |
5359 | return true; | |
5360 | } | |
5361 | ||
5362 | return false; | |
5363 | } | |
5364 | ||
49dbfa7b LP |
5365 | bool is_valid_documentation_url(const char *url) { |
5366 | assert(url); | |
5367 | ||
5368 | if (startswith(url, "http://") && url[7]) | |
5369 | return true; | |
5370 | ||
5371 | if (startswith(url, "https://") && url[8]) | |
5372 | return true; | |
5373 | ||
5374 | if (startswith(url, "file:") && url[5]) | |
5375 | return true; | |
5376 | ||
5377 | if (startswith(url, "info:") && url[5]) | |
5378 | return true; | |
5379 | ||
5380 | if (startswith(url, "man:") && url[4]) | |
5381 | return true; | |
5382 | ||
5383 | return false; | |
5384 | } | |
9be346c9 HH |
5385 | |
5386 | bool in_initrd(void) { | |
a05f97b3 | 5387 | static __thread int saved = -1; |
825c6fe5 | 5388 | struct statfs s; |
8f33b5b8 | 5389 | |
825c6fe5 LP |
5390 | if (saved >= 0) |
5391 | return saved; | |
5392 | ||
5393 | /* We make two checks here: | |
5394 | * | |
5395 | * 1. the flag file /etc/initrd-release must exist | |
5396 | * 2. the root file system must be a memory file system | |
5397 | * | |
5398 | * The second check is extra paranoia, since misdetecting an | |
5399 | * initrd can have bad bad consequences due the initrd | |
5400 | * emptying when transititioning to the main systemd. | |
5401 | */ | |
5402 | ||
5403 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5404 | statfs("/", &s) >= 0 && | |
943aad8c | 5405 | is_temporary_fs(&s); |
9be346c9 | 5406 | |
8f33b5b8 | 5407 | return saved; |
9be346c9 | 5408 | } |
069cfc85 LP |
5409 | |
5410 | void warn_melody(void) { | |
e67f47e5 | 5411 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5412 | |
5413 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5414 | if (fd < 0) | |
5415 | return; | |
5416 | ||
040f18ea | 5417 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5418 | |
5419 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5420 | usleep(125*USEC_PER_MSEC); | |
5421 | ||
5422 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5423 | usleep(125*USEC_PER_MSEC); | |
5424 | ||
5425 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5426 | usleep(125*USEC_PER_MSEC); | |
5427 | ||
5428 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5429 | } |
cd3bd60a LP |
5430 | |
5431 | int make_console_stdio(void) { | |
5432 | int fd, r; | |
5433 | ||
5434 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5435 | ||
5436 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5437 | if (fd < 0) { | |
5438 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5439 | return fd; | |
5440 | } | |
5441 | ||
5442 | r = make_stdio(fd); | |
5443 | if (r < 0) { | |
5444 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5445 | return r; | |
5446 | } | |
5447 | ||
5448 | return 0; | |
5449 | } | |
7c5f152a LP |
5450 | |
5451 | int get_home_dir(char **_h) { | |
5452 | char *h; | |
5453 | const char *e; | |
5454 | uid_t u; | |
5455 | struct passwd *p; | |
5456 | ||
5457 | assert(_h); | |
5458 | ||
5459 | /* Take the user specified one */ | |
5460 | e = getenv("HOME"); | |
5461 | if (e) { | |
5462 | h = strdup(e); | |
5463 | if (!h) | |
5464 | return -ENOMEM; | |
5465 | ||
5466 | *_h = h; | |
5467 | return 0; | |
5468 | } | |
5469 | ||
5470 | /* Hardcode home directory for root to avoid NSS */ | |
5471 | u = getuid(); | |
5472 | if (u == 0) { | |
5473 | h = strdup("/root"); | |
5474 | if (!h) | |
5475 | return -ENOMEM; | |
5476 | ||
5477 | *_h = h; | |
5478 | return 0; | |
5479 | } | |
5480 | ||
5481 | /* Check the database... */ | |
5482 | errno = 0; | |
5483 | p = getpwuid(u); | |
5484 | if (!p) | |
e67f47e5 | 5485 | return errno ? -errno : -ESRCH; |
7c5f152a LP |
5486 | |
5487 | if (!path_is_absolute(p->pw_dir)) | |
5488 | return -EINVAL; | |
5489 | ||
5490 | h = strdup(p->pw_dir); | |
5491 | if (!h) | |
5492 | return -ENOMEM; | |
5493 | ||
5494 | *_h = h; | |
5495 | return 0; | |
5496 | } | |
5497 | ||
5498 | int get_shell(char **_sh) { | |
5499 | char *sh; | |
5500 | const char *e; | |
5501 | uid_t u; | |
5502 | struct passwd *p; | |
5503 | ||
5504 | assert(_sh); | |
5505 | ||
5506 | /* Take the user specified one */ | |
5507 | e = getenv("SHELL"); | |
5508 | if (e) { | |
5509 | sh = strdup(e); | |
5510 | if (!sh) | |
5511 | return -ENOMEM; | |
5512 | ||
5513 | *_sh = sh; | |
5514 | return 0; | |
5515 | } | |
5516 | ||
5517 | /* Hardcode home directory for root to avoid NSS */ | |
5518 | u = getuid(); | |
5519 | if (u == 0) { | |
5520 | sh = strdup("/bin/sh"); | |
5521 | if (!sh) | |
5522 | return -ENOMEM; | |
5523 | ||
5524 | *_sh = sh; | |
5525 | return 0; | |
5526 | } | |
5527 | ||
5528 | /* Check the database... */ | |
5529 | errno = 0; | |
5530 | p = getpwuid(u); | |
5531 | if (!p) | |
5532 | return errno ? -errno : -ESRCH; | |
5533 | ||
5534 | if (!path_is_absolute(p->pw_shell)) | |
5535 | return -EINVAL; | |
5536 | ||
5537 | sh = strdup(p->pw_shell); | |
5538 | if (!sh) | |
5539 | return -ENOMEM; | |
5540 | ||
5541 | *_sh = sh; | |
5542 | return 0; | |
5543 | } | |
2fbe635a LP |
5544 | |
5545 | void freep(void *p) { | |
5546 | free(*(void**) p); | |
5547 | } | |
5548 | ||
5549 | void fclosep(FILE **f) { | |
5550 | if (*f) | |
5551 | fclose(*f); | |
5552 | } | |
e67f47e5 | 5553 | |
e985665d ZJS |
5554 | void pclosep(FILE **f) { |
5555 | if (*f) | |
5556 | pclose(*f); | |
5557 | } | |
5558 | ||
e67f47e5 LP |
5559 | void closep(int *fd) { |
5560 | if (*fd >= 0) | |
5561 | close_nointr_nofail(*fd); | |
5562 | } | |
a05f97b3 LP |
5563 | |
5564 | void closedirp(DIR **d) { | |
5565 | if (*d) | |
5566 | closedir(*d); | |
5567 | } | |
25ea79fe ZJS |
5568 | |
5569 | void umaskp(mode_t *u) { | |
5570 | umask(*u); | |
5571 | } | |
0b507b17 LP |
5572 | |
5573 | bool filename_is_safe(const char *p) { | |
5574 | ||
5575 | if (isempty(p)) | |
5576 | return false; | |
5577 | ||
5578 | if (strchr(p, '/')) | |
5579 | return false; | |
5580 | ||
5581 | if (streq(p, ".")) | |
5582 | return false; | |
5583 | ||
5584 | if (streq(p, "..")) | |
5585 | return false; | |
5586 | ||
5587 | if (strlen(p) > FILENAME_MAX) | |
5588 | return false; | |
5589 | ||
5590 | return true; | |
5591 | } | |
5592 | ||
5593 | bool string_is_safe(const char *p) { | |
5594 | const char *t; | |
5595 | ||
5596 | assert(p); | |
5597 | ||
5598 | for (t = p; *t; t++) { | |
01539d6e | 5599 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5600 | return false; |
5601 | ||
011afa76 | 5602 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5603 | return false; |
5604 | } | |
5605 | ||
5606 | return true; | |
5607 | } | |
cfbc22ab | 5608 | |
4d1a6904 LP |
5609 | bool string_has_cc(const char *p) { |
5610 | const char *t; | |
5611 | ||
5612 | assert(p); | |
5613 | ||
5614 | for (t = p; *t; t++) | |
5615 | if (*t > 0 && *t < ' ') | |
5616 | return true; | |
5617 | ||
5618 | return false; | |
5619 | } | |
5620 | ||
e884315e LP |
5621 | bool path_is_safe(const char *p) { |
5622 | ||
5623 | if (isempty(p)) | |
5624 | return false; | |
5625 | ||
5626 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5627 | return false; | |
5628 | ||
5629 | if (strlen(p) > PATH_MAX) | |
5630 | return false; | |
5631 | ||
5632 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5633 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5634 | return false; | |
5635 | ||
5636 | if (strstr(p, "//")) | |
5637 | return false; | |
5638 | ||
5639 | return true; | |
5640 | } | |
5641 | ||
a9e12476 KS |
5642 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5643 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5644 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5645 | size_t l, u, idx; |
5646 | const void *p; | |
5647 | int comparison; | |
5648 | ||
5649 | l = 0; | |
5650 | u = nmemb; | |
5651 | while (l < u) { | |
5652 | idx = (l + u) / 2; | |
5653 | p = (void *)(((const char *) base) + (idx * size)); | |
5654 | comparison = compar(key, p, arg); | |
5655 | if (comparison < 0) | |
5656 | u = idx; | |
5657 | else if (comparison > 0) | |
5658 | l = idx + 1; | |
5659 | else | |
5660 | return (void *)p; | |
5661 | } | |
5662 | return NULL; | |
5663 | } | |
09017585 MS |
5664 | |
5665 | bool is_locale_utf8(void) { | |
5666 | const char *set; | |
5667 | static int cached_answer = -1; | |
5668 | ||
5669 | if (cached_answer >= 0) | |
5670 | goto out; | |
5671 | ||
5672 | if (!setlocale(LC_ALL, "")) { | |
5673 | cached_answer = true; | |
5674 | goto out; | |
5675 | } | |
5676 | ||
5677 | set = nl_langinfo(CODESET); | |
5678 | if (!set) { | |
5679 | cached_answer = true; | |
5680 | goto out; | |
5681 | } | |
5682 | ||
5683 | cached_answer = streq(set, "UTF-8"); | |
5684 | out: | |
5685 | return (bool)cached_answer; | |
5686 | } | |
c339d977 MS |
5687 | |
5688 | const char *draw_special_char(DrawSpecialChar ch) { | |
5689 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
5690 | /* UTF-8 */ { | |
45a5ff0d MS |
5691 | [DRAW_TREE_VERT] = "\342\224\202 ", /* │ */ |
5692 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ | |
5693 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5694 | [DRAW_TREE_SPACE] = " ", /* */ |
45a5ff0d | 5695 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243 ", /* ‣ */ |
c339d977 MS |
5696 | }, |
5697 | /* ASCII fallback */ { | |
45a5ff0d MS |
5698 | [DRAW_TREE_VERT] = "| ", |
5699 | [DRAW_TREE_BRANCH] = "|-", | |
5700 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5701 | [DRAW_TREE_SPACE] = " ", |
45a5ff0d | 5702 | [DRAW_TRIANGULAR_BULLET] = "> ", |
c339d977 MS |
5703 | } |
5704 | }; | |
5705 | ||
5706 | return draw_table[!is_locale_utf8()][ch]; | |
5707 | } | |
409bc9c3 LP |
5708 | |
5709 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5710 | const char *f; | |
5711 | char *t, *r; | |
5712 | size_t l, old_len, new_len; | |
5713 | ||
5714 | assert(text); | |
5715 | assert(old_string); | |
5716 | assert(new_string); | |
5717 | ||
5718 | old_len = strlen(old_string); | |
5719 | new_len = strlen(new_string); | |
5720 | ||
5721 | l = strlen(text); | |
5722 | r = new(char, l+1); | |
5723 | if (!r) | |
5724 | return NULL; | |
5725 | ||
5726 | f = text; | |
5727 | t = r; | |
5728 | while (*f) { | |
5729 | char *a; | |
5730 | size_t d, nl; | |
5731 | ||
5732 | if (!startswith(f, old_string)) { | |
5733 | *(t++) = *(f++); | |
5734 | continue; | |
5735 | } | |
5736 | ||
5737 | d = t - r; | |
5738 | nl = l - old_len + new_len; | |
5739 | a = realloc(r, nl + 1); | |
5740 | if (!a) | |
5741 | goto oom; | |
5742 | ||
5743 | l = nl; | |
5744 | r = a; | |
5745 | t = r + d; | |
5746 | ||
5747 | t = stpcpy(t, new_string); | |
5748 | f += old_len; | |
5749 | } | |
5750 | ||
5751 | *t = 0; | |
5752 | return r; | |
5753 | ||
5754 | oom: | |
5755 | free(r); | |
5756 | return NULL; | |
5757 | } | |
e8bc0ea2 LP |
5758 | |
5759 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5760 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5761 | enum { |
5762 | STATE_OTHER, | |
5763 | STATE_ESCAPE, | |
5764 | STATE_BRACKET | |
5765 | } state = STATE_OTHER; | |
5766 | char *obuf = NULL; | |
5767 | size_t osz = 0, isz; | |
5768 | FILE *f; | |
5769 | ||
5770 | assert(ibuf); | |
5771 | assert(*ibuf); | |
5772 | ||
5773 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5774 | ||
5775 | isz = _isz ? *_isz : strlen(*ibuf); | |
5776 | ||
5777 | f = open_memstream(&obuf, &osz); | |
5778 | if (!f) | |
5779 | return NULL; | |
5780 | ||
5781 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5782 | ||
5783 | switch (state) { | |
5784 | ||
5785 | case STATE_OTHER: | |
5786 | if (i >= *ibuf + isz) /* EOT */ | |
5787 | break; | |
5788 | else if (*i == '\x1B') | |
5789 | state = STATE_ESCAPE; | |
5790 | else if (*i == '\t') | |
5791 | fputs(" ", f); | |
5792 | else | |
5793 | fputc(*i, f); | |
5794 | break; | |
5795 | ||
5796 | case STATE_ESCAPE: | |
5797 | if (i >= *ibuf + isz) { /* EOT */ | |
5798 | fputc('\x1B', f); | |
5799 | break; | |
5800 | } else if (*i == '[') { | |
5801 | state = STATE_BRACKET; | |
5802 | begin = i + 1; | |
5803 | } else { | |
5804 | fputc('\x1B', f); | |
5805 | fputc(*i, f); | |
5806 | state = STATE_OTHER; | |
5807 | } | |
5808 | ||
5809 | break; | |
5810 | ||
5811 | case STATE_BRACKET: | |
5812 | ||
5813 | if (i >= *ibuf + isz || /* EOT */ | |
5814 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5815 | fputc('\x1B', f); | |
5816 | fputc('[', f); | |
5817 | state = STATE_OTHER; | |
5818 | i = begin-1; | |
5819 | } else if (*i == 'm') | |
5820 | state = STATE_OTHER; | |
5821 | break; | |
5822 | } | |
5823 | } | |
5824 | ||
5825 | if (ferror(f)) { | |
5826 | fclose(f); | |
5827 | free(obuf); | |
5828 | return NULL; | |
5829 | } | |
5830 | ||
5831 | fclose(f); | |
5832 | ||
5833 | free(*ibuf); | |
5834 | *ibuf = obuf; | |
5835 | ||
5836 | if (_isz) | |
5837 | *_isz = osz; | |
5838 | ||
5839 | return obuf; | |
5840 | } | |
240dbaa4 LP |
5841 | |
5842 | int on_ac_power(void) { | |
5843 | bool found_offline = false, found_online = false; | |
5844 | _cleanup_closedir_ DIR *d = NULL; | |
5845 | ||
5846 | d = opendir("/sys/class/power_supply"); | |
5847 | if (!d) | |
5848 | return -errno; | |
5849 | ||
5850 | for (;;) { | |
5851 | struct dirent *de; | |
5852 | union dirent_storage buf; | |
5853 | _cleanup_free_ char *p = NULL; | |
5854 | _cleanup_close_ int fd = -1, device = -1; | |
5855 | char contents[6]; | |
5856 | ssize_t n; | |
5857 | int k; | |
5858 | ||
5859 | k = readdir_r(d, &buf.de, &de); | |
5860 | if (k != 0) | |
5861 | return -k; | |
5862 | ||
5863 | if (!de) | |
5864 | break; | |
5865 | ||
5866 | if (ignore_file(de->d_name)) | |
5867 | continue; | |
5868 | ||
5869 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5870 | if (device < 0) { | |
5871 | if (errno == ENOENT || errno == ENOTDIR) | |
5872 | continue; | |
5873 | ||
5874 | return -errno; | |
5875 | } | |
5876 | ||
5877 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5878 | if (fd < 0) { | |
5879 | if (errno == ENOENT) | |
5880 | continue; | |
5881 | ||
5882 | return -errno; | |
5883 | } | |
5884 | ||
5885 | n = read(fd, contents, sizeof(contents)); | |
5886 | if (n < 0) | |
5887 | return -errno; | |
5888 | ||
5889 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
5890 | continue; | |
5891 | ||
5892 | close_nointr_nofail(fd); | |
5893 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
5894 | if (fd < 0) { | |
5895 | if (errno == ENOENT) | |
5896 | continue; | |
5897 | ||
5898 | return -errno; | |
5899 | } | |
5900 | ||
5901 | n = read(fd, contents, sizeof(contents)); | |
5902 | if (n < 0) | |
5903 | return -errno; | |
5904 | ||
5905 | if (n != 2 || contents[1] != '\n') | |
5906 | return -EIO; | |
5907 | ||
5908 | if (contents[0] == '1') { | |
5909 | found_online = true; | |
5910 | break; | |
5911 | } else if (contents[0] == '0') | |
5912 | found_offline = true; | |
5913 | else | |
5914 | return -EIO; | |
5915 | } | |
5916 | ||
5917 | return found_online || !found_offline; | |
5918 | } | |
fabe5c0e LP |
5919 | |
5920 | static int search_and_fopen_internal(const char *path, const char *mode, char **search, FILE **_f) { | |
5921 | char **i; | |
5922 | ||
5923 | assert(path); | |
5924 | assert(mode); | |
5925 | assert(_f); | |
5926 | ||
5927 | if (!path_strv_canonicalize_uniq(search)) | |
5928 | return -ENOMEM; | |
5929 | ||
5930 | STRV_FOREACH(i, search) { | |
5931 | _cleanup_free_ char *p = NULL; | |
5932 | FILE *f; | |
5933 | ||
5934 | p = strjoin(*i, "/", path, NULL); | |
5935 | if (!p) | |
5936 | return -ENOMEM; | |
5937 | ||
5938 | f = fopen(p, mode); | |
5939 | if (f) { | |
5940 | *_f = f; | |
5941 | return 0; | |
5942 | } | |
5943 | ||
5944 | if (errno != ENOENT) | |
5945 | return -errno; | |
5946 | } | |
5947 | ||
5948 | return -ENOENT; | |
5949 | } | |
5950 | ||
5951 | int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f) { | |
5952 | _cleanup_strv_free_ char **copy = NULL; | |
5953 | ||
5954 | assert(path); | |
5955 | assert(mode); | |
5956 | assert(_f); | |
5957 | ||
5958 | if (path_is_absolute(path)) { | |
5959 | FILE *f; | |
5960 | ||
5961 | f = fopen(path, mode); | |
5962 | if (f) { | |
5963 | *_f = f; | |
5964 | return 0; | |
5965 | } | |
5966 | ||
5967 | return -errno; | |
5968 | } | |
5969 | ||
5970 | copy = strv_copy((char**) search); | |
5971 | if (!copy) | |
5972 | return -ENOMEM; | |
5973 | ||
5974 | return search_and_fopen_internal(path, mode, copy, _f); | |
5975 | } | |
5976 | ||
5977 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f) { | |
5978 | _cleanup_strv_free_ char **s = NULL; | |
5979 | ||
5980 | if (path_is_absolute(path)) { | |
5981 | FILE *f; | |
5982 | ||
5983 | f = fopen(path, mode); | |
5984 | if (f) { | |
5985 | *_f = f; | |
5986 | return 0; | |
5987 | } | |
5988 | ||
5989 | return -errno; | |
5990 | } | |
5991 | ||
5992 | s = strv_split_nulstr(search); | |
5993 | if (!s) | |
5994 | return -ENOMEM; | |
5995 | ||
5996 | return search_and_fopen_internal(path, mode, s, _f); | |
5997 | } |