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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> |
60918275 LP |
60 | |
61 | #include "macro.h" | |
62 | #include "util.h" | |
1dccbe19 LP |
63 | #include "ioprio.h" |
64 | #include "missing.h" | |
a9f5d454 | 65 | #include "log.h" |
65d2ebdc | 66 | #include "strv.h" |
e51bc1a2 | 67 | #include "label.h" |
9eb977db | 68 | #include "path-util.h" |
d06dacd0 | 69 | #include "exit-status.h" |
83cc030f | 70 | #include "hashmap.h" |
56cf987f | 71 | |
9a0e6896 LP |
72 | int saved_argc = 0; |
73 | char **saved_argv = NULL; | |
9086e840 | 74 | |
28917d7d | 75 | static volatile unsigned cached_columns = 0; |
ed757c0c | 76 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 77 | |
37f85e66 | 78 | size_t page_size(void) { |
79 | static __thread size_t pgsz = 0; | |
80 | long r; | |
81 | ||
87d2c1ff | 82 | if (_likely_(pgsz > 0)) |
37f85e66 | 83 | return pgsz; |
84 | ||
e67f47e5 LP |
85 | r = sysconf(_SC_PAGESIZE); |
86 | assert(r > 0); | |
37f85e66 | 87 | |
88 | pgsz = (size_t) r; | |
37f85e66 | 89 | return pgsz; |
90 | } | |
91 | ||
e05797fb LP |
92 | bool streq_ptr(const char *a, const char *b) { |
93 | ||
94 | /* Like streq(), but tries to make sense of NULL pointers */ | |
95 | ||
96 | if (a && b) | |
97 | return streq(a, b); | |
98 | ||
99 | if (!a && !b) | |
100 | return true; | |
101 | ||
102 | return false; | |
103 | } | |
104 | ||
47be870b | 105 | usec_t now(clockid_t clock_id) { |
60918275 LP |
106 | struct timespec ts; |
107 | ||
47be870b | 108 | assert_se(clock_gettime(clock_id, &ts) == 0); |
60918275 LP |
109 | |
110 | return timespec_load(&ts); | |
111 | } | |
112 | ||
63983207 | 113 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { |
871d7de4 LP |
114 | assert(ts); |
115 | ||
116 | ts->realtime = now(CLOCK_REALTIME); | |
117 | ts->monotonic = now(CLOCK_MONOTONIC); | |
118 | ||
119 | return ts; | |
120 | } | |
121 | ||
a185c5aa LP |
122 | dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) { |
123 | int64_t delta; | |
124 | assert(ts); | |
125 | ||
126 | ts->realtime = u; | |
127 | ||
128 | if (u == 0) | |
129 | ts->monotonic = 0; | |
130 | else { | |
131 | delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; | |
132 | ||
133 | ts->monotonic = now(CLOCK_MONOTONIC); | |
134 | ||
135 | if ((int64_t) ts->monotonic > delta) | |
136 | ts->monotonic -= delta; | |
137 | else | |
138 | ts->monotonic = 0; | |
139 | } | |
140 | ||
141 | return ts; | |
142 | } | |
143 | ||
60918275 LP |
144 | usec_t timespec_load(const struct timespec *ts) { |
145 | assert(ts); | |
146 | ||
b1c80623 LP |
147 | if (ts->tv_sec == (time_t) -1 && |
148 | ts->tv_nsec == (long) -1) | |
149 | return (usec_t) -1; | |
150 | ||
fd09c93d | 151 | if ((usec_t) ts->tv_sec > (UINT64_MAX - (ts->tv_nsec / NSEC_PER_USEC)) / USEC_PER_SEC) |
3dd8ee8f MS |
152 | return (usec_t) -1; |
153 | ||
60918275 LP |
154 | return |
155 | (usec_t) ts->tv_sec * USEC_PER_SEC + | |
156 | (usec_t) ts->tv_nsec / NSEC_PER_USEC; | |
157 | } | |
158 | ||
159 | struct timespec *timespec_store(struct timespec *ts, usec_t u) { | |
160 | assert(ts); | |
161 | ||
b1c80623 LP |
162 | if (u == (usec_t) -1) { |
163 | ts->tv_sec = (time_t) -1; | |
164 | ts->tv_nsec = (long) -1; | |
165 | return ts; | |
166 | } | |
167 | ||
60918275 LP |
168 | ts->tv_sec = (time_t) (u / USEC_PER_SEC); |
169 | ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); | |
170 | ||
171 | return ts; | |
172 | } | |
173 | ||
174 | usec_t timeval_load(const struct timeval *tv) { | |
175 | assert(tv); | |
176 | ||
b1c80623 LP |
177 | if (tv->tv_sec == (time_t) -1 && |
178 | tv->tv_usec == (suseconds_t) -1) | |
179 | return (usec_t) -1; | |
180 | ||
fd09c93d | 181 | if ((usec_t) tv->tv_sec > (UINT64_MAX - tv->tv_usec) / USEC_PER_SEC) |
3dd8ee8f MS |
182 | return (usec_t) -1; |
183 | ||
60918275 LP |
184 | return |
185 | (usec_t) tv->tv_sec * USEC_PER_SEC + | |
186 | (usec_t) tv->tv_usec; | |
187 | } | |
188 | ||
189 | struct timeval *timeval_store(struct timeval *tv, usec_t u) { | |
190 | assert(tv); | |
191 | ||
b1c80623 LP |
192 | if (u == (usec_t) -1) { |
193 | tv->tv_sec = (time_t) -1; | |
194 | tv->tv_usec = (suseconds_t) -1; | |
195 | return tv; | |
196 | } | |
197 | ||
60918275 LP |
198 | tv->tv_sec = (time_t) (u / USEC_PER_SEC); |
199 | tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); | |
200 | ||
201 | return tv; | |
202 | } | |
203 | ||
8c7c140f | 204 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
205 | size_t sl, pl; |
206 | ||
207 | assert(s); | |
208 | assert(postfix); | |
209 | ||
210 | sl = strlen(s); | |
211 | pl = strlen(postfix); | |
212 | ||
d4d0d4db | 213 | if (pl == 0) |
8c7c140f | 214 | return (char*) s + sl; |
d4d0d4db | 215 | |
60918275 | 216 | if (sl < pl) |
8c7c140f LP |
217 | return NULL; |
218 | ||
219 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
220 | return NULL; | |
60918275 | 221 | |
8c7c140f | 222 | return (char*) s + sl - pl; |
60918275 LP |
223 | } |
224 | ||
e8988fc2 LP |
225 | char* startswith(const char *s, const char *prefix) { |
226 | const char *a, *b; | |
60918275 LP |
227 | |
228 | assert(s); | |
229 | assert(prefix); | |
230 | ||
e8988fc2 LP |
231 | a = s, b = prefix; |
232 | for (;;) { | |
233 | if (*b == 0) | |
234 | return (char*) a; | |
235 | if (*a != *b) | |
236 | return NULL; | |
60918275 | 237 | |
e8988fc2 LP |
238 | a++, b++; |
239 | } | |
60918275 LP |
240 | } |
241 | ||
e8988fc2 LP |
242 | char* startswith_no_case(const char *s, const char *prefix) { |
243 | const char *a, *b; | |
3177a7fa MAP |
244 | |
245 | assert(s); | |
246 | assert(prefix); | |
247 | ||
e8988fc2 LP |
248 | a = s, b = prefix; |
249 | for (;;) { | |
250 | if (*b == 0) | |
251 | return (char*) a; | |
252 | if (tolower(*a) != tolower(*b)) | |
253 | return NULL; | |
3177a7fa | 254 | |
e8988fc2 LP |
255 | a++, b++; |
256 | } | |
3177a7fa MAP |
257 | } |
258 | ||
79d6d816 LP |
259 | bool first_word(const char *s, const char *word) { |
260 | size_t sl, wl; | |
261 | ||
262 | assert(s); | |
263 | assert(word); | |
264 | ||
265 | sl = strlen(s); | |
266 | wl = strlen(word); | |
267 | ||
268 | if (sl < wl) | |
269 | return false; | |
270 | ||
d4d0d4db LP |
271 | if (wl == 0) |
272 | return true; | |
273 | ||
79d6d816 LP |
274 | if (memcmp(s, word, wl) != 0) |
275 | return false; | |
276 | ||
d4d0d4db LP |
277 | return s[wl] == 0 || |
278 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
279 | } |
280 | ||
42f4e3c4 | 281 | int close_nointr(int fd) { |
60918275 LP |
282 | assert(fd >= 0); |
283 | ||
284 | for (;;) { | |
285 | int r; | |
286 | ||
48f82119 LP |
287 | r = close(fd); |
288 | if (r >= 0) | |
60918275 LP |
289 | return r; |
290 | ||
291 | if (errno != EINTR) | |
48f82119 | 292 | return -errno; |
60918275 LP |
293 | } |
294 | } | |
85261803 | 295 | |
85f136b5 | 296 | void close_nointr_nofail(int fd) { |
80876c20 | 297 | int saved_errno = errno; |
85f136b5 LP |
298 | |
299 | /* like close_nointr() but cannot fail, and guarantees errno | |
300 | * is unchanged */ | |
301 | ||
302 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
303 | |
304 | errno = saved_errno; | |
85f136b5 LP |
305 | } |
306 | ||
5b6319dc LP |
307 | void close_many(const int fds[], unsigned n_fd) { |
308 | unsigned i; | |
309 | ||
310 | for (i = 0; i < n_fd; i++) | |
311 | close_nointr_nofail(fds[i]); | |
312 | } | |
313 | ||
85261803 LP |
314 | int parse_boolean(const char *v) { |
315 | assert(v); | |
316 | ||
44d8db9e | 317 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on")) |
85261803 | 318 | return 1; |
44d8db9e | 319 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off")) |
85261803 LP |
320 | return 0; |
321 | ||
322 | return -EINVAL; | |
323 | } | |
324 | ||
3ba686c1 | 325 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 326 | unsigned long ul = 0; |
3ba686c1 LP |
327 | pid_t pid; |
328 | int r; | |
329 | ||
330 | assert(s); | |
331 | assert(ret_pid); | |
332 | ||
e67f47e5 LP |
333 | r = safe_atolu(s, &ul); |
334 | if (r < 0) | |
3ba686c1 LP |
335 | return r; |
336 | ||
337 | pid = (pid_t) ul; | |
338 | ||
339 | if ((unsigned long) pid != ul) | |
340 | return -ERANGE; | |
341 | ||
342 | if (pid <= 0) | |
343 | return -ERANGE; | |
344 | ||
345 | *ret_pid = pid; | |
346 | return 0; | |
347 | } | |
348 | ||
034a2a52 LP |
349 | int parse_uid(const char *s, uid_t* ret_uid) { |
350 | unsigned long ul = 0; | |
351 | uid_t uid; | |
352 | int r; | |
353 | ||
354 | assert(s); | |
355 | assert(ret_uid); | |
356 | ||
e67f47e5 LP |
357 | r = safe_atolu(s, &ul); |
358 | if (r < 0) | |
034a2a52 LP |
359 | return r; |
360 | ||
361 | uid = (uid_t) ul; | |
362 | ||
363 | if ((unsigned long) uid != ul) | |
364 | return -ERANGE; | |
365 | ||
366 | *ret_uid = uid; | |
367 | return 0; | |
368 | } | |
369 | ||
85261803 LP |
370 | int safe_atou(const char *s, unsigned *ret_u) { |
371 | char *x = NULL; | |
034c6ed7 | 372 | unsigned long l; |
85261803 LP |
373 | |
374 | assert(s); | |
375 | assert(ret_u); | |
376 | ||
377 | errno = 0; | |
378 | l = strtoul(s, &x, 0); | |
379 | ||
f3910003 | 380 | if (!x || x == s || *x || errno) |
85261803 LP |
381 | return errno ? -errno : -EINVAL; |
382 | ||
034c6ed7 | 383 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
384 | return -ERANGE; |
385 | ||
386 | *ret_u = (unsigned) l; | |
387 | return 0; | |
388 | } | |
389 | ||
390 | int safe_atoi(const char *s, int *ret_i) { | |
391 | char *x = NULL; | |
034c6ed7 | 392 | long l; |
85261803 LP |
393 | |
394 | assert(s); | |
395 | assert(ret_i); | |
396 | ||
397 | errno = 0; | |
398 | l = strtol(s, &x, 0); | |
399 | ||
f3910003 | 400 | if (!x || x == s || *x || errno) |
85261803 LP |
401 | return errno ? -errno : -EINVAL; |
402 | ||
034c6ed7 | 403 | if ((long) (int) l != l) |
85261803 LP |
404 | return -ERANGE; |
405 | ||
034c6ed7 LP |
406 | *ret_i = (int) l; |
407 | return 0; | |
408 | } | |
409 | ||
034c6ed7 LP |
410 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
411 | char *x = NULL; | |
412 | unsigned long long l; | |
413 | ||
414 | assert(s); | |
415 | assert(ret_llu); | |
416 | ||
417 | errno = 0; | |
418 | l = strtoull(s, &x, 0); | |
419 | ||
f3910003 | 420 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
421 | return errno ? -errno : -EINVAL; |
422 | ||
423 | *ret_llu = l; | |
424 | return 0; | |
425 | } | |
426 | ||
427 | int safe_atolli(const char *s, long long int *ret_lli) { | |
428 | char *x = NULL; | |
429 | long long l; | |
430 | ||
431 | assert(s); | |
432 | assert(ret_lli); | |
433 | ||
434 | errno = 0; | |
435 | l = strtoll(s, &x, 0); | |
436 | ||
f3910003 | 437 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
438 | return errno ? -errno : -EINVAL; |
439 | ||
440 | *ret_lli = l; | |
85261803 LP |
441 | return 0; |
442 | } | |
a41e8209 | 443 | |
a41e8209 | 444 | /* Split a string into words. */ |
65d2ebdc | 445 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
446 | char *current; |
447 | ||
448 | current = *state ? *state : (char*) c; | |
449 | ||
450 | if (!*current || *c == 0) | |
451 | return NULL; | |
452 | ||
65d2ebdc LP |
453 | current += strspn(current, separator); |
454 | *l = strcspn(current, separator); | |
82919e3d LP |
455 | *state = current+*l; |
456 | ||
457 | return (char*) current; | |
458 | } | |
459 | ||
034c6ed7 LP |
460 | /* Split a string into words, but consider strings enclosed in '' and |
461 | * "" as words even if they include spaces. */ | |
462 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
463 | char *current, *e; |
464 | bool escaped = false; | |
034c6ed7 LP |
465 | |
466 | current = *state ? *state : (char*) c; | |
467 | ||
468 | if (!*current || *c == 0) | |
469 | return NULL; | |
470 | ||
471 | current += strspn(current, WHITESPACE); | |
472 | ||
473 | if (*current == '\'') { | |
474 | current ++; | |
034c6ed7 | 475 | |
0bab36f2 LP |
476 | for (e = current; *e; e++) { |
477 | if (escaped) | |
478 | escaped = false; | |
479 | else if (*e == '\\') | |
480 | escaped = true; | |
481 | else if (*e == '\'') | |
482 | break; | |
483 | } | |
484 | ||
485 | *l = e-current; | |
486 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
487 | } else if (*current == '\"') { |
488 | current ++; | |
034c6ed7 | 489 | |
0bab36f2 LP |
490 | for (e = current; *e; e++) { |
491 | if (escaped) | |
492 | escaped = false; | |
493 | else if (*e == '\\') | |
494 | escaped = true; | |
495 | else if (*e == '\"') | |
496 | break; | |
497 | } | |
498 | ||
499 | *l = e-current; | |
500 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 501 | } else { |
0bab36f2 LP |
502 | for (e = current; *e; e++) { |
503 | if (escaped) | |
504 | escaped = false; | |
505 | else if (*e == '\\') | |
506 | escaped = true; | |
507 | else if (strchr(WHITESPACE, *e)) | |
508 | break; | |
509 | } | |
510 | *l = e-current; | |
511 | *state = e; | |
034c6ed7 LP |
512 | } |
513 | ||
514 | return (char*) current; | |
515 | } | |
516 | ||
034c6ed7 LP |
517 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
518 | int r; | |
2fbe635a | 519 | _cleanup_fclose_ FILE *f = NULL; |
20c03b7b | 520 | char fn[PATH_MAX], line[LINE_MAX], *p; |
bb00e604 | 521 | long unsigned ppid; |
034c6ed7 | 522 | |
8480e784 | 523 | assert(pid > 0); |
034c6ed7 LP |
524 | assert(_ppid); |
525 | ||
bb00e604 | 526 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
8480e784 | 527 | char_array_0(fn); |
034c6ed7 | 528 | |
2fbe635a LP |
529 | f = fopen(fn, "re"); |
530 | if (!f) | |
034c6ed7 LP |
531 | return -errno; |
532 | ||
2fbe635a | 533 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 534 | r = feof(f) ? -EIO : -errno; |
034c6ed7 LP |
535 | fclose(f); |
536 | return r; | |
537 | } | |
538 | ||
034c6ed7 LP |
539 | /* Let's skip the pid and comm fields. The latter is enclosed |
540 | * in () but does not escape any () in its value, so let's | |
541 | * skip over it manually */ | |
542 | ||
2fbe635a LP |
543 | p = strrchr(line, ')'); |
544 | if (!p) | |
034c6ed7 LP |
545 | return -EIO; |
546 | ||
547 | p++; | |
548 | ||
549 | if (sscanf(p, " " | |
550 | "%*c " /* state */ | |
bb00e604 | 551 | "%lu ", /* ppid */ |
034c6ed7 LP |
552 | &ppid) != 1) |
553 | return -EIO; | |
554 | ||
bb00e604 | 555 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
556 | return -ERANGE; |
557 | ||
558 | *_ppid = (pid_t) ppid; | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
7640a5de | 563 | int get_starttime_of_pid(pid_t pid, unsigned long long *st) { |
e67f47e5 | 564 | _cleanup_fclose_ FILE *f = NULL; |
7640a5de LP |
565 | char fn[PATH_MAX], line[LINE_MAX], *p; |
566 | ||
567 | assert(pid > 0); | |
568 | assert(st); | |
569 | ||
570 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); | |
571 | char_array_0(fn); | |
572 | ||
e67f47e5 LP |
573 | f = fopen(fn, "re"); |
574 | if (!f) | |
7640a5de LP |
575 | return -errno; |
576 | ||
e67f47e5 LP |
577 | if (!fgets(line, sizeof(line), f)) { |
578 | if (ferror(f)) | |
579 | return -errno; | |
7640a5de | 580 | |
e67f47e5 LP |
581 | return -EIO; |
582 | } | |
7640a5de LP |
583 | |
584 | /* Let's skip the pid and comm fields. The latter is enclosed | |
585 | * in () but does not escape any () in its value, so let's | |
586 | * skip over it manually */ | |
587 | ||
e67f47e5 LP |
588 | p = strrchr(line, ')'); |
589 | if (!p) | |
7640a5de LP |
590 | return -EIO; |
591 | ||
592 | p++; | |
593 | ||
594 | if (sscanf(p, " " | |
595 | "%*c " /* state */ | |
596 | "%*d " /* ppid */ | |
597 | "%*d " /* pgrp */ | |
598 | "%*d " /* session */ | |
599 | "%*d " /* tty_nr */ | |
600 | "%*d " /* tpgid */ | |
601 | "%*u " /* flags */ | |
602 | "%*u " /* minflt */ | |
603 | "%*u " /* cminflt */ | |
604 | "%*u " /* majflt */ | |
605 | "%*u " /* cmajflt */ | |
606 | "%*u " /* utime */ | |
607 | "%*u " /* stime */ | |
608 | "%*d " /* cutime */ | |
609 | "%*d " /* cstime */ | |
610 | "%*d " /* priority */ | |
611 | "%*d " /* nice */ | |
612 | "%*d " /* num_threads */ | |
613 | "%*d " /* itrealvalue */ | |
614 | "%llu " /* starttime */, | |
615 | st) != 1) | |
616 | return -EIO; | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
034c6ed7 | 621 | int write_one_line_file(const char *fn, const char *line) { |
e67f47e5 | 622 | _cleanup_fclose_ FILE *f = NULL; |
034c6ed7 LP |
623 | |
624 | assert(fn); | |
625 | assert(line); | |
626 | ||
03ad1136 LP |
627 | f = fopen(fn, "we"); |
628 | if (!f) | |
034c6ed7 LP |
629 | return -errno; |
630 | ||
34ca941c | 631 | errno = 0; |
e67f47e5 LP |
632 | if (fputs(line, f) < 0) |
633 | return errno ? -errno : -EIO; | |
034c6ed7 | 634 | |
8e1bd70d LP |
635 | if (!endswith(line, "\n")) |
636 | fputc('\n', f); | |
637 | ||
151b190e LP |
638 | fflush(f); |
639 | ||
e67f47e5 LP |
640 | if (ferror(f)) |
641 | return errno ? -errno : -EIO; | |
151b190e | 642 | |
e67f47e5 | 643 | return 0; |
034c6ed7 LP |
644 | } |
645 | ||
34ca941c LP |
646 | int fchmod_umask(int fd, mode_t m) { |
647 | mode_t u; | |
648 | int r; | |
649 | ||
650 | u = umask(0777); | |
651 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
652 | umask(u); | |
653 | ||
654 | return r; | |
655 | } | |
656 | ||
657 | int write_one_line_file_atomic(const char *fn, const char *line) { | |
658 | FILE *f; | |
659 | int r; | |
660 | char *p; | |
661 | ||
662 | assert(fn); | |
663 | assert(line); | |
664 | ||
665 | r = fopen_temporary(fn, &f, &p); | |
666 | if (r < 0) | |
667 | return r; | |
668 | ||
669 | fchmod_umask(fileno(f), 0644); | |
670 | ||
671 | errno = 0; | |
672 | if (fputs(line, f) < 0) { | |
673 | r = -errno; | |
674 | goto finish; | |
675 | } | |
676 | ||
677 | if (!endswith(line, "\n")) | |
678 | fputc('\n', f); | |
679 | ||
680 | fflush(f); | |
681 | ||
682 | if (ferror(f)) { | |
683 | if (errno != 0) | |
684 | r = -errno; | |
685 | else | |
686 | r = -EIO; | |
687 | } else { | |
688 | if (rename(p, fn) < 0) | |
689 | r = -errno; | |
690 | else | |
691 | r = 0; | |
692 | } | |
693 | ||
694 | finish: | |
695 | if (r < 0) | |
696 | unlink(p); | |
697 | ||
698 | fclose(f); | |
699 | free(p); | |
700 | ||
701 | return r; | |
702 | } | |
703 | ||
034c6ed7 | 704 | int read_one_line_file(const char *fn, char **line) { |
2fbe635a | 705 | _cleanup_fclose_ FILE *f = NULL; |
97c4a07d | 706 | char t[LINE_MAX], *c; |
034c6ed7 LP |
707 | |
708 | assert(fn); | |
709 | assert(line); | |
710 | ||
4099a281 LP |
711 | f = fopen(fn, "re"); |
712 | if (!f) | |
034c6ed7 LP |
713 | return -errno; |
714 | ||
4099a281 LP |
715 | if (!fgets(t, sizeof(t), f)) { |
716 | ||
2fbe635a | 717 | if (ferror(f)) |
e67f47e5 | 718 | return errno ? -errno : -EIO; |
4099a281 LP |
719 | |
720 | t[0] = 0; | |
034c6ed7 LP |
721 | } |
722 | ||
4099a281 | 723 | c = strdup(t); |
2fbe635a LP |
724 | if (!c) |
725 | return -ENOMEM; | |
6f9a471a LP |
726 | truncate_nl(c); |
727 | ||
034c6ed7 | 728 | *line = c; |
2fbe635a | 729 | return 0; |
034c6ed7 | 730 | } |
44d8db9e | 731 | |
34ca941c | 732 | int read_full_file(const char *fn, char **contents, size_t *size) { |
2fbe635a | 733 | _cleanup_fclose_ FILE *f = NULL; |
97c4a07d | 734 | size_t n, l; |
2fbe635a | 735 | _cleanup_free_ char *buf = NULL; |
97c4a07d LP |
736 | struct stat st; |
737 | ||
2fbe635a LP |
738 | f = fopen(fn, "re"); |
739 | if (!f) | |
97c4a07d LP |
740 | return -errno; |
741 | ||
2fbe635a LP |
742 | if (fstat(fileno(f), &st) < 0) |
743 | return -errno; | |
97c4a07d | 744 | |
34ca941c | 745 | /* Safety check */ |
2fbe635a LP |
746 | if (st.st_size > 4*1024*1024) |
747 | return -E2BIG; | |
34ca941c | 748 | |
97c4a07d LP |
749 | n = st.st_size > 0 ? st.st_size : LINE_MAX; |
750 | l = 0; | |
751 | ||
752 | for (;;) { | |
753 | char *t; | |
754 | size_t k; | |
755 | ||
2fbe635a LP |
756 | t = realloc(buf, n+1); |
757 | if (!t) | |
758 | return -ENOMEM; | |
97c4a07d LP |
759 | |
760 | buf = t; | |
761 | k = fread(buf + l, 1, n - l, f); | |
762 | ||
763 | if (k <= 0) { | |
2fbe635a LP |
764 | if (ferror(f)) |
765 | return -errno; | |
97c4a07d LP |
766 | |
767 | break; | |
768 | } | |
769 | ||
770 | l += k; | |
771 | n *= 2; | |
772 | ||
773 | /* Safety check */ | |
2fbe635a LP |
774 | if (n > 4*1024*1024) |
775 | return -E2BIG; | |
97c4a07d LP |
776 | } |
777 | ||
f8440af5 | 778 | buf[l] = 0; |
97c4a07d LP |
779 | *contents = buf; |
780 | buf = NULL; | |
781 | ||
34ca941c LP |
782 | if (size) |
783 | *size = l; | |
784 | ||
2fbe635a | 785 | return 0; |
97c4a07d LP |
786 | } |
787 | ||
788 | int parse_env_file( | |
789 | const char *fname, | |
c899f8c6 | 790 | const char *separator, ...) { |
97c4a07d | 791 | |
ce8a6aa1 | 792 | int r = 0; |
44d91056 | 793 | char *contents = NULL, *p; |
97c4a07d LP |
794 | |
795 | assert(fname); | |
c899f8c6 | 796 | assert(separator); |
97c4a07d | 797 | |
34ca941c | 798 | if ((r = read_full_file(fname, &contents, NULL)) < 0) |
97c4a07d LP |
799 | return r; |
800 | ||
801 | p = contents; | |
802 | for (;;) { | |
803 | const char *key = NULL; | |
804 | ||
c899f8c6 | 805 | p += strspn(p, separator); |
97c4a07d LP |
806 | p += strspn(p, WHITESPACE); |
807 | ||
808 | if (!*p) | |
809 | break; | |
810 | ||
811 | if (!strchr(COMMENTS, *p)) { | |
812 | va_list ap; | |
813 | char **value; | |
814 | ||
c899f8c6 | 815 | va_start(ap, separator); |
97c4a07d LP |
816 | while ((key = va_arg(ap, char *))) { |
817 | size_t n; | |
818 | char *v; | |
819 | ||
820 | value = va_arg(ap, char **); | |
821 | ||
822 | n = strlen(key); | |
823 | if (strncmp(p, key, n) != 0 || | |
824 | p[n] != '=') | |
825 | continue; | |
826 | ||
827 | p += n + 1; | |
c899f8c6 | 828 | n = strcspn(p, separator); |
97c4a07d LP |
829 | |
830 | if (n >= 2 && | |
e7db37dd LP |
831 | strchr(QUOTES, p[0]) && |
832 | p[n-1] == p[0]) | |
97c4a07d LP |
833 | v = strndup(p+1, n-2); |
834 | else | |
835 | v = strndup(p, n); | |
836 | ||
837 | if (!v) { | |
838 | r = -ENOMEM; | |
839 | va_end(ap); | |
840 | goto fail; | |
841 | } | |
842 | ||
dd36de4d KS |
843 | if (v[0] == '\0') { |
844 | /* return empty value strings as NULL */ | |
845 | free(v); | |
846 | v = NULL; | |
847 | } | |
848 | ||
97c4a07d LP |
849 | free(*value); |
850 | *value = v; | |
851 | ||
852 | p += n; | |
ce8a6aa1 LP |
853 | |
854 | r ++; | |
97c4a07d LP |
855 | break; |
856 | } | |
857 | va_end(ap); | |
858 | } | |
859 | ||
860 | if (!key) | |
c899f8c6 | 861 | p += strcspn(p, separator); |
97c4a07d LP |
862 | } |
863 | ||
97c4a07d LP |
864 | fail: |
865 | free(contents); | |
866 | return r; | |
867 | } | |
868 | ||
8c7be95e LP |
869 | int load_env_file( |
870 | const char *fname, | |
871 | char ***rl) { | |
872 | ||
873 | FILE *f; | |
6a39419f | 874 | char **m = NULL; |
8c7be95e LP |
875 | int r; |
876 | ||
877 | assert(fname); | |
878 | assert(rl); | |
879 | ||
880 | if (!(f = fopen(fname, "re"))) | |
881 | return -errno; | |
882 | ||
883 | while (!feof(f)) { | |
884 | char l[LINE_MAX], *p, *u; | |
885 | char **t; | |
886 | ||
887 | if (!fgets(l, sizeof(l), f)) { | |
888 | if (feof(f)) | |
889 | break; | |
890 | ||
891 | r = -errno; | |
892 | goto finish; | |
893 | } | |
894 | ||
895 | p = strstrip(l); | |
896 | ||
897 | if (!*p) | |
898 | continue; | |
899 | ||
900 | if (strchr(COMMENTS, *p)) | |
901 | continue; | |
902 | ||
903 | if (!(u = normalize_env_assignment(p))) { | |
0d0f0c50 | 904 | r = log_oom(); |
8c7be95e LP |
905 | goto finish; |
906 | } | |
907 | ||
908 | t = strv_append(m, u); | |
909 | free(u); | |
910 | ||
911 | if (!t) { | |
0d0f0c50 | 912 | r = log_oom(); |
8c7be95e LP |
913 | goto finish; |
914 | } | |
915 | ||
916 | strv_free(m); | |
917 | m = t; | |
918 | } | |
919 | ||
920 | r = 0; | |
921 | ||
922 | *rl = m; | |
923 | m = NULL; | |
924 | ||
925 | finish: | |
926 | if (f) | |
927 | fclose(f); | |
928 | ||
929 | strv_free(m); | |
930 | ||
931 | return r; | |
932 | } | |
933 | ||
7640a5de | 934 | int write_env_file(const char *fname, char **l) { |
34ca941c | 935 | char **i, *p; |
7640a5de LP |
936 | FILE *f; |
937 | int r; | |
938 | ||
34ca941c LP |
939 | r = fopen_temporary(fname, &f, &p); |
940 | if (r < 0) | |
941 | return r; | |
7640a5de | 942 | |
34ca941c LP |
943 | fchmod_umask(fileno(f), 0644); |
944 | ||
945 | errno = 0; | |
7640a5de LP |
946 | STRV_FOREACH(i, l) { |
947 | fputs(*i, f); | |
948 | fputc('\n', f); | |
949 | } | |
950 | ||
951 | fflush(f); | |
952 | ||
34ca941c LP |
953 | if (ferror(f)) { |
954 | if (errno != 0) | |
955 | r = -errno; | |
956 | else | |
957 | r = -EIO; | |
958 | } else { | |
959 | if (rename(p, fname) < 0) | |
960 | r = -errno; | |
961 | else | |
962 | r = 0; | |
963 | } | |
964 | ||
965 | if (r < 0) | |
966 | unlink(p); | |
967 | ||
7640a5de | 968 | fclose(f); |
34ca941c | 969 | free(p); |
7640a5de LP |
970 | |
971 | return r; | |
972 | } | |
973 | ||
7072ced8 LP |
974 | char *truncate_nl(char *s) { |
975 | assert(s); | |
976 | ||
977 | s[strcspn(s, NEWLINE)] = 0; | |
978 | return s; | |
979 | } | |
980 | ||
87d2c1ff | 981 | int get_process_comm(pid_t pid, char **name) { |
7072ced8 LP |
982 | int r; |
983 | ||
7072ced8 LP |
984 | assert(name); |
985 | ||
87d2c1ff LP |
986 | if (pid == 0) |
987 | r = read_one_line_file("/proc/self/comm", name); | |
988 | else { | |
989 | char *p; | |
990 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) | |
991 | return -ENOMEM; | |
7072ced8 | 992 | |
87d2c1ff LP |
993 | r = read_one_line_file(p, name); |
994 | free(p); | |
995 | } | |
7072ced8 | 996 | |
87d2c1ff | 997 | return r; |
7072ced8 LP |
998 | } |
999 | ||
87d2c1ff LP |
1000 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
1001 | char *r, *k; | |
c59760ee LP |
1002 | int c; |
1003 | bool space = false; | |
1004 | size_t left; | |
1005 | FILE *f; | |
1006 | ||
c59760ee LP |
1007 | assert(max_length > 0); |
1008 | assert(line); | |
1009 | ||
87d2c1ff LP |
1010 | if (pid == 0) |
1011 | f = fopen("/proc/self/cmdline", "re"); | |
1012 | else { | |
1013 | char *p; | |
1014 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1015 | return -ENOMEM; | |
c59760ee | 1016 | |
87d2c1ff LP |
1017 | f = fopen(p, "re"); |
1018 | free(p); | |
1019 | } | |
c59760ee LP |
1020 | |
1021 | if (!f) | |
1022 | return -errno; | |
1023 | ||
87d2c1ff LP |
1024 | r = new(char, max_length); |
1025 | if (!r) { | |
c59760ee LP |
1026 | fclose(f); |
1027 | return -ENOMEM; | |
1028 | } | |
1029 | ||
1030 | k = r; | |
1031 | left = max_length; | |
1032 | while ((c = getc(f)) != EOF) { | |
1033 | ||
1034 | if (isprint(c)) { | |
1035 | if (space) { | |
1036 | if (left <= 4) | |
1037 | break; | |
1038 | ||
1039 | *(k++) = ' '; | |
057fbb58 | 1040 | left--; |
c59760ee LP |
1041 | space = false; |
1042 | } | |
1043 | ||
1044 | if (left <= 4) | |
1045 | break; | |
1046 | ||
1047 | *(k++) = (char) c; | |
057fbb58 | 1048 | left--; |
c59760ee LP |
1049 | } else |
1050 | space = true; | |
1051 | } | |
1052 | ||
1053 | if (left <= 4) { | |
1054 | size_t n = MIN(left-1, 3U); | |
1055 | memcpy(k, "...", n); | |
1056 | k[n] = 0; | |
1057 | } else | |
1058 | *k = 0; | |
1059 | ||
1060 | fclose(f); | |
1061 | ||
35d2e7ec LP |
1062 | /* Kernel threads have no argv[] */ |
1063 | if (r[0] == 0) { | |
1064 | char *t; | |
1065 | int h; | |
1066 | ||
1067 | free(r); | |
1068 | ||
87d2c1ff LP |
1069 | if (!comm_fallback) |
1070 | return -ENOENT; | |
1071 | ||
1072 | h = get_process_comm(pid, &t); | |
1073 | if (h < 0) | |
35d2e7ec LP |
1074 | return h; |
1075 | ||
b7def684 | 1076 | r = strjoin("[", t, "]", NULL); |
35d2e7ec LP |
1077 | free(t); |
1078 | ||
87d2c1ff | 1079 | if (!r) |
35d2e7ec LP |
1080 | return -ENOMEM; |
1081 | } | |
fa776d8e | 1082 | |
c59760ee LP |
1083 | *line = r; |
1084 | return 0; | |
1085 | } | |
1086 | ||
1e5678d0 LP |
1087 | int is_kernel_thread(pid_t pid) { |
1088 | char *p; | |
1089 | size_t count; | |
1090 | char c; | |
1091 | bool eof; | |
1092 | FILE *f; | |
1093 | ||
1094 | if (pid == 0) | |
1095 | return 0; | |
1096 | ||
1097 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
1098 | return -ENOMEM; | |
1099 | ||
1100 | f = fopen(p, "re"); | |
1101 | free(p); | |
1102 | ||
1103 | if (!f) | |
1104 | return -errno; | |
1105 | ||
1106 | count = fread(&c, 1, 1, f); | |
1107 | eof = feof(f); | |
1108 | fclose(f); | |
1109 | ||
1110 | /* Kernel threads have an empty cmdline */ | |
1111 | ||
1112 | if (count <= 0) | |
1113 | return eof ? 1 : -errno; | |
1114 | ||
1115 | return 0; | |
1116 | } | |
1117 | ||
87d2c1ff LP |
1118 | int get_process_exe(pid_t pid, char **name) { |
1119 | int r; | |
1120 | ||
1121 | assert(name); | |
1122 | ||
1123 | if (pid == 0) | |
1124 | r = readlink_malloc("/proc/self/exe", name); | |
1125 | else { | |
1126 | char *p; | |
1127 | if (asprintf(&p, "/proc/%lu/exe", (unsigned long) pid) < 0) | |
1128 | return -ENOMEM; | |
1129 | ||
1130 | r = readlink_malloc(p, name); | |
1131 | free(p); | |
1132 | } | |
1133 | ||
1134 | return r; | |
1135 | } | |
1136 | ||
901c3d0d | 1137 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
7e4ab3c5 LP |
1138 | char *p; |
1139 | FILE *f; | |
1140 | int r; | |
1141 | ||
1142 | assert(uid); | |
1143 | ||
1144 | if (pid == 0) | |
1145 | return getuid(); | |
1146 | ||
1147 | if (asprintf(&p, "/proc/%lu/status", (unsigned long) pid) < 0) | |
1148 | return -ENOMEM; | |
1149 | ||
1150 | f = fopen(p, "re"); | |
1151 | free(p); | |
1152 | ||
1153 | if (!f) | |
1154 | return -errno; | |
1155 | ||
1156 | while (!feof(f)) { | |
1157 | char line[LINE_MAX], *l; | |
1158 | ||
1159 | if (!fgets(line, sizeof(line), f)) { | |
1160 | if (feof(f)) | |
1161 | break; | |
1162 | ||
1163 | r = -errno; | |
1164 | goto finish; | |
1165 | } | |
1166 | ||
1167 | l = strstrip(line); | |
1168 | ||
901c3d0d LP |
1169 | if (startswith(l, field)) { |
1170 | l += strlen(field); | |
7e4ab3c5 LP |
1171 | l += strspn(l, WHITESPACE); |
1172 | ||
1173 | l[strcspn(l, WHITESPACE)] = 0; | |
1174 | ||
1175 | r = parse_uid(l, uid); | |
1176 | goto finish; | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | r = -EIO; | |
1181 | ||
1182 | finish: | |
1183 | fclose(f); | |
1184 | ||
1185 | return r; | |
1186 | } | |
1187 | ||
901c3d0d LP |
1188 | int get_process_uid(pid_t pid, uid_t *uid) { |
1189 | return get_process_id(pid, "Uid:", uid); | |
1190 | } | |
1191 | ||
1192 | int get_process_gid(pid_t pid, gid_t *gid) { | |
1193 | return get_process_id(pid, "Gid:", gid); | |
1194 | } | |
1195 | ||
fab56fc5 LP |
1196 | char *strnappend(const char *s, const char *suffix, size_t b) { |
1197 | size_t a; | |
44d8db9e LP |
1198 | char *r; |
1199 | ||
fab56fc5 LP |
1200 | if (!s && !suffix) |
1201 | return strdup(""); | |
1202 | ||
1203 | if (!s) | |
1204 | return strndup(suffix, b); | |
1205 | ||
1206 | if (!suffix) | |
1207 | return strdup(s); | |
1208 | ||
44d8db9e LP |
1209 | assert(s); |
1210 | assert(suffix); | |
1211 | ||
1212 | a = strlen(s); | |
aa408e77 | 1213 | if (b > ((size_t) -1) - a) |
040f18ea | 1214 | return NULL; |
44d8db9e | 1215 | |
040f18ea LP |
1216 | r = new(char, a+b+1); |
1217 | if (!r) | |
44d8db9e LP |
1218 | return NULL; |
1219 | ||
1220 | memcpy(r, s, a); | |
1221 | memcpy(r+a, suffix, b); | |
1222 | r[a+b] = 0; | |
1223 | ||
1224 | return r; | |
1225 | } | |
87f0e418 | 1226 | |
fab56fc5 LP |
1227 | char *strappend(const char *s, const char *suffix) { |
1228 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
1229 | } | |
1230 | ||
87f0e418 LP |
1231 | int readlink_malloc(const char *p, char **r) { |
1232 | size_t l = 100; | |
1233 | ||
1234 | assert(p); | |
1235 | assert(r); | |
1236 | ||
1237 | for (;;) { | |
1238 | char *c; | |
1239 | ssize_t n; | |
1240 | ||
1241 | if (!(c = new(char, l))) | |
1242 | return -ENOMEM; | |
1243 | ||
1244 | if ((n = readlink(p, c, l-1)) < 0) { | |
1245 | int ret = -errno; | |
1246 | free(c); | |
1247 | return ret; | |
1248 | } | |
1249 | ||
1250 | if ((size_t) n < l-1) { | |
1251 | c[n] = 0; | |
1252 | *r = c; | |
1253 | return 0; | |
1254 | } | |
1255 | ||
1256 | free(c); | |
1257 | l *= 2; | |
1258 | } | |
1259 | } | |
1260 | ||
2c7108c4 LP |
1261 | int readlink_and_make_absolute(const char *p, char **r) { |
1262 | char *target, *k; | |
1263 | int j; | |
1264 | ||
1265 | assert(p); | |
1266 | assert(r); | |
1267 | ||
1268 | if ((j = readlink_malloc(p, &target)) < 0) | |
1269 | return j; | |
1270 | ||
1271 | k = file_in_same_dir(p, target); | |
1272 | free(target); | |
1273 | ||
1274 | if (!k) | |
1275 | return -ENOMEM; | |
1276 | ||
1277 | *r = k; | |
1278 | return 0; | |
1279 | } | |
1280 | ||
83096483 LP |
1281 | int readlink_and_canonicalize(const char *p, char **r) { |
1282 | char *t, *s; | |
1283 | int j; | |
1284 | ||
1285 | assert(p); | |
1286 | assert(r); | |
1287 | ||
1288 | j = readlink_and_make_absolute(p, &t); | |
1289 | if (j < 0) | |
1290 | return j; | |
1291 | ||
1292 | s = canonicalize_file_name(t); | |
1293 | if (s) { | |
1294 | free(t); | |
1295 | *r = s; | |
1296 | } else | |
1297 | *r = t; | |
1298 | ||
1299 | path_kill_slashes(*r); | |
1300 | ||
1301 | return 0; | |
1302 | } | |
1303 | ||
2a987ee8 LP |
1304 | int reset_all_signal_handlers(void) { |
1305 | int sig; | |
1306 | ||
1307 | for (sig = 1; sig < _NSIG; sig++) { | |
1308 | struct sigaction sa; | |
1309 | ||
1310 | if (sig == SIGKILL || sig == SIGSTOP) | |
1311 | continue; | |
1312 | ||
1313 | zero(sa); | |
1314 | sa.sa_handler = SIG_DFL; | |
431c32bf | 1315 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
1316 | |
1317 | /* On Linux the first two RT signals are reserved by | |
1318 | * glibc, and sigaction() will return EINVAL for them. */ | |
1319 | if ((sigaction(sig, &sa, NULL) < 0)) | |
1320 | if (errno != EINVAL) | |
1321 | return -errno; | |
1322 | } | |
1323 | ||
8e274523 | 1324 | return 0; |
2a987ee8 | 1325 | } |
4a72ff34 LP |
1326 | |
1327 | char *strstrip(char *s) { | |
57a8eca8 | 1328 | char *e; |
4a72ff34 LP |
1329 | |
1330 | /* Drops trailing whitespace. Modifies the string in | |
1331 | * place. Returns pointer to first non-space character */ | |
1332 | ||
1333 | s += strspn(s, WHITESPACE); | |
1334 | ||
57a8eca8 LP |
1335 | for (e = strchr(s, 0); e > s; e --) |
1336 | if (!strchr(WHITESPACE, e[-1])) | |
1337 | break; | |
4a72ff34 | 1338 | |
57a8eca8 | 1339 | *e = 0; |
4a72ff34 LP |
1340 | |
1341 | return s; | |
4a72ff34 LP |
1342 | } |
1343 | ||
ee9b5e01 LP |
1344 | char *delete_chars(char *s, const char *bad) { |
1345 | char *f, *t; | |
1346 | ||
1347 | /* Drops all whitespace, regardless where in the string */ | |
1348 | ||
1349 | for (f = s, t = s; *f; f++) { | |
1350 | if (strchr(bad, *f)) | |
1351 | continue; | |
1352 | ||
1353 | *(t++) = *f; | |
1354 | } | |
1355 | ||
1356 | *t = 0; | |
1357 | ||
1358 | return s; | |
1359 | } | |
1360 | ||
ab1f0633 LP |
1361 | bool in_charset(const char *s, const char* charset) { |
1362 | const char *i; | |
1363 | ||
1364 | assert(s); | |
1365 | assert(charset); | |
1366 | ||
1367 | for (i = s; *i; i++) | |
1368 | if (!strchr(charset, *i)) | |
1369 | return false; | |
1370 | ||
1371 | return true; | |
1372 | } | |
1373 | ||
4a72ff34 LP |
1374 | char *file_in_same_dir(const char *path, const char *filename) { |
1375 | char *e, *r; | |
1376 | size_t k; | |
1377 | ||
1378 | assert(path); | |
1379 | assert(filename); | |
1380 | ||
1381 | /* This removes the last component of path and appends | |
1382 | * filename, unless the latter is absolute anyway or the | |
1383 | * former isn't */ | |
1384 | ||
1385 | if (path_is_absolute(filename)) | |
1386 | return strdup(filename); | |
1387 | ||
1388 | if (!(e = strrchr(path, '/'))) | |
1389 | return strdup(filename); | |
1390 | ||
1391 | k = strlen(filename); | |
1392 | if (!(r = new(char, e-path+1+k+1))) | |
1393 | return NULL; | |
1394 | ||
1395 | memcpy(r, path, e-path+1); | |
1396 | memcpy(r+(e-path)+1, filename, k+1); | |
1397 | ||
1398 | return r; | |
1399 | } | |
fb624d04 | 1400 | |
c32dd69b LP |
1401 | int rmdir_parents(const char *path, const char *stop) { |
1402 | size_t l; | |
1403 | int r = 0; | |
1404 | ||
1405 | assert(path); | |
1406 | assert(stop); | |
1407 | ||
1408 | l = strlen(path); | |
1409 | ||
1410 | /* Skip trailing slashes */ | |
1411 | while (l > 0 && path[l-1] == '/') | |
1412 | l--; | |
1413 | ||
1414 | while (l > 0) { | |
1415 | char *t; | |
1416 | ||
1417 | /* Skip last component */ | |
1418 | while (l > 0 && path[l-1] != '/') | |
1419 | l--; | |
1420 | ||
1421 | /* Skip trailing slashes */ | |
1422 | while (l > 0 && path[l-1] == '/') | |
1423 | l--; | |
1424 | ||
1425 | if (l <= 0) | |
1426 | break; | |
1427 | ||
1428 | if (!(t = strndup(path, l))) | |
1429 | return -ENOMEM; | |
1430 | ||
1431 | if (path_startswith(stop, t)) { | |
1432 | free(t); | |
1433 | return 0; | |
1434 | } | |
1435 | ||
1436 | r = rmdir(t); | |
1437 | free(t); | |
1438 | ||
1439 | if (r < 0) | |
1440 | if (errno != ENOENT) | |
1441 | return -errno; | |
1442 | } | |
1443 | ||
1444 | return 0; | |
1445 | } | |
1446 | ||
1447 | ||
fb624d04 LP |
1448 | char hexchar(int x) { |
1449 | static const char table[16] = "0123456789abcdef"; | |
1450 | ||
1451 | return table[x & 15]; | |
1452 | } | |
4fe88d28 LP |
1453 | |
1454 | int unhexchar(char c) { | |
1455 | ||
1456 | if (c >= '0' && c <= '9') | |
1457 | return c - '0'; | |
1458 | ||
1459 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1460 | return c - 'a' + 10; |
4fe88d28 LP |
1461 | |
1462 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1463 | return c - 'A' + 10; |
4fe88d28 LP |
1464 | |
1465 | return -1; | |
1466 | } | |
1467 | ||
1468 | char octchar(int x) { | |
1469 | return '0' + (x & 7); | |
1470 | } | |
1471 | ||
1472 | int unoctchar(char c) { | |
1473 | ||
1474 | if (c >= '0' && c <= '7') | |
1475 | return c - '0'; | |
1476 | ||
1477 | return -1; | |
1478 | } | |
1479 | ||
5af98f82 LP |
1480 | char decchar(int x) { |
1481 | return '0' + (x % 10); | |
1482 | } | |
1483 | ||
1484 | int undecchar(char c) { | |
1485 | ||
1486 | if (c >= '0' && c <= '9') | |
1487 | return c - '0'; | |
1488 | ||
1489 | return -1; | |
1490 | } | |
1491 | ||
4fe88d28 LP |
1492 | char *cescape(const char *s) { |
1493 | char *r, *t; | |
1494 | const char *f; | |
1495 | ||
1496 | assert(s); | |
1497 | ||
1498 | /* Does C style string escaping. */ | |
1499 | ||
f8e2fb7b LP |
1500 | r = new(char, strlen(s)*4 + 1); |
1501 | if (!r) | |
4fe88d28 LP |
1502 | return NULL; |
1503 | ||
1504 | for (f = s, t = r; *f; f++) | |
1505 | ||
1506 | switch (*f) { | |
1507 | ||
1508 | case '\a': | |
1509 | *(t++) = '\\'; | |
1510 | *(t++) = 'a'; | |
1511 | break; | |
1512 | case '\b': | |
1513 | *(t++) = '\\'; | |
1514 | *(t++) = 'b'; | |
1515 | break; | |
1516 | case '\f': | |
1517 | *(t++) = '\\'; | |
1518 | *(t++) = 'f'; | |
1519 | break; | |
1520 | case '\n': | |
1521 | *(t++) = '\\'; | |
1522 | *(t++) = 'n'; | |
1523 | break; | |
1524 | case '\r': | |
1525 | *(t++) = '\\'; | |
1526 | *(t++) = 'r'; | |
1527 | break; | |
1528 | case '\t': | |
1529 | *(t++) = '\\'; | |
1530 | *(t++) = 't'; | |
1531 | break; | |
1532 | case '\v': | |
1533 | *(t++) = '\\'; | |
1534 | *(t++) = 'v'; | |
1535 | break; | |
1536 | case '\\': | |
1537 | *(t++) = '\\'; | |
1538 | *(t++) = '\\'; | |
1539 | break; | |
1540 | case '"': | |
1541 | *(t++) = '\\'; | |
1542 | *(t++) = '"'; | |
1543 | break; | |
1544 | case '\'': | |
1545 | *(t++) = '\\'; | |
1546 | *(t++) = '\''; | |
1547 | break; | |
1548 | ||
1549 | default: | |
1550 | /* For special chars we prefer octal over | |
1551 | * hexadecimal encoding, simply because glib's | |
1552 | * g_strescape() does the same */ | |
1553 | if ((*f < ' ') || (*f >= 127)) { | |
1554 | *(t++) = '\\'; | |
1555 | *(t++) = octchar((unsigned char) *f >> 6); | |
1556 | *(t++) = octchar((unsigned char) *f >> 3); | |
1557 | *(t++) = octchar((unsigned char) *f); | |
1558 | } else | |
1559 | *(t++) = *f; | |
1560 | break; | |
1561 | } | |
1562 | ||
1563 | *t = 0; | |
1564 | ||
1565 | return r; | |
1566 | } | |
1567 | ||
5b4c61cd | 1568 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1569 | char *r, *t; |
1570 | const char *f; | |
5b4c61cd | 1571 | size_t pl; |
4fe88d28 LP |
1572 | |
1573 | assert(s); | |
1574 | ||
5b4c61cd LP |
1575 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1576 | ||
1577 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1578 | |
5b4c61cd | 1579 | r = new(char, pl+length+1); |
7f110ff9 | 1580 | if (!r) |
4fe88d28 LP |
1581 | return r; |
1582 | ||
5b4c61cd LP |
1583 | if (prefix) |
1584 | memcpy(r, prefix, pl); | |
1585 | ||
1586 | for (f = s, t = r + pl; f < s + length; f++) { | |
4fe88d28 LP |
1587 | |
1588 | if (*f != '\\') { | |
1589 | *(t++) = *f; | |
1590 | continue; | |
1591 | } | |
1592 | ||
1593 | f++; | |
1594 | ||
1595 | switch (*f) { | |
1596 | ||
1597 | case 'a': | |
1598 | *(t++) = '\a'; | |
1599 | break; | |
1600 | case 'b': | |
1601 | *(t++) = '\b'; | |
1602 | break; | |
1603 | case 'f': | |
1604 | *(t++) = '\f'; | |
1605 | break; | |
1606 | case 'n': | |
1607 | *(t++) = '\n'; | |
1608 | break; | |
1609 | case 'r': | |
1610 | *(t++) = '\r'; | |
1611 | break; | |
1612 | case 't': | |
1613 | *(t++) = '\t'; | |
1614 | break; | |
1615 | case 'v': | |
1616 | *(t++) = '\v'; | |
1617 | break; | |
1618 | case '\\': | |
1619 | *(t++) = '\\'; | |
1620 | break; | |
1621 | case '"': | |
1622 | *(t++) = '"'; | |
1623 | break; | |
1624 | case '\'': | |
1625 | *(t++) = '\''; | |
1626 | break; | |
1627 | ||
e167fb86 LP |
1628 | case 's': |
1629 | /* This is an extension of the XDG syntax files */ | |
1630 | *(t++) = ' '; | |
1631 | break; | |
1632 | ||
4fe88d28 LP |
1633 | case 'x': { |
1634 | /* hexadecimal encoding */ | |
1635 | int a, b; | |
1636 | ||
7f110ff9 LP |
1637 | a = unhexchar(f[1]); |
1638 | b = unhexchar(f[2]); | |
1639 | ||
1640 | if (a < 0 || b < 0) { | |
4fe88d28 LP |
1641 | /* Invalid escape code, let's take it literal then */ |
1642 | *(t++) = '\\'; | |
1643 | *(t++) = 'x'; | |
1644 | } else { | |
1645 | *(t++) = (char) ((a << 4) | b); | |
1646 | f += 2; | |
1647 | } | |
1648 | ||
1649 | break; | |
1650 | } | |
1651 | ||
1652 | case '0': | |
1653 | case '1': | |
1654 | case '2': | |
1655 | case '3': | |
1656 | case '4': | |
1657 | case '5': | |
1658 | case '6': | |
1659 | case '7': { | |
1660 | /* octal encoding */ | |
1661 | int a, b, c; | |
1662 | ||
7f110ff9 LP |
1663 | a = unoctchar(f[0]); |
1664 | b = unoctchar(f[1]); | |
1665 | c = unoctchar(f[2]); | |
1666 | ||
1667 | if (a < 0 || b < 0 || c < 0) { | |
4fe88d28 LP |
1668 | /* Invalid escape code, let's take it literal then */ |
1669 | *(t++) = '\\'; | |
1670 | *(t++) = f[0]; | |
1671 | } else { | |
1672 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1673 | f += 2; | |
1674 | } | |
1675 | ||
1676 | break; | |
1677 | } | |
1678 | ||
1679 | case 0: | |
1680 | /* premature end of string.*/ | |
1681 | *(t++) = '\\'; | |
1682 | goto finish; | |
1683 | ||
1684 | default: | |
1685 | /* Invalid escape code, let's take it literal then */ | |
1686 | *(t++) = '\\'; | |
f3d4cc01 | 1687 | *(t++) = *f; |
4fe88d28 LP |
1688 | break; |
1689 | } | |
1690 | } | |
1691 | ||
1692 | finish: | |
1693 | *t = 0; | |
1694 | return r; | |
1695 | } | |
1696 | ||
5b4c61cd LP |
1697 | char *cunescape_length(const char *s, size_t length) { |
1698 | return cunescape_length_with_prefix(s, length, NULL); | |
1699 | } | |
1700 | ||
6febfd0d | 1701 | char *cunescape(const char *s) { |
5b4c61cd LP |
1702 | assert(s); |
1703 | ||
6febfd0d LP |
1704 | return cunescape_length(s, strlen(s)); |
1705 | } | |
4fe88d28 LP |
1706 | |
1707 | char *xescape(const char *s, const char *bad) { | |
1708 | char *r, *t; | |
1709 | const char *f; | |
1710 | ||
1711 | /* Escapes all chars in bad, in addition to \ and all special | |
1712 | * chars, in \xFF style escaping. May be reversed with | |
1713 | * cunescape. */ | |
1714 | ||
08ace05b LP |
1715 | r = new(char, strlen(s) * 4 + 1); |
1716 | if (!r) | |
4fe88d28 LP |
1717 | return NULL; |
1718 | ||
1719 | for (f = s, t = r; *f; f++) { | |
1720 | ||
b866264a LP |
1721 | if ((*f < ' ') || (*f >= 127) || |
1722 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1723 | *(t++) = '\\'; |
1724 | *(t++) = 'x'; | |
1725 | *(t++) = hexchar(*f >> 4); | |
1726 | *(t++) = hexchar(*f); | |
1727 | } else | |
1728 | *(t++) = *f; | |
1729 | } | |
1730 | ||
1731 | *t = 0; | |
1732 | ||
1733 | return r; | |
1734 | } | |
1735 | ||
ea430986 | 1736 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1737 | char *r, *t; |
1738 | const char *f; | |
1739 | ||
47be870b LP |
1740 | assert(s); |
1741 | ||
ea430986 LP |
1742 | /* Escapes all chars that D-Bus' object path cannot deal |
1743 | * with. Can be reverse with bus_path_unescape() */ | |
1744 | ||
1745 | if (!(r = new(char, strlen(s)*3+1))) | |
1746 | return NULL; | |
1747 | ||
1748 | for (f = s, t = r; *f; f++) { | |
1749 | ||
1750 | if (!(*f >= 'A' && *f <= 'Z') && | |
1751 | !(*f >= 'a' && *f <= 'z') && | |
1752 | !(*f >= '0' && *f <= '9')) { | |
1753 | *(t++) = '_'; | |
1754 | *(t++) = hexchar(*f >> 4); | |
1755 | *(t++) = hexchar(*f); | |
1756 | } else | |
1757 | *(t++) = *f; | |
1758 | } | |
1759 | ||
1760 | *t = 0; | |
1761 | ||
1762 | return r; | |
1763 | } | |
1764 | ||
9e2f7c11 | 1765 | char *bus_path_unescape(const char *f) { |
ea430986 | 1766 | char *r, *t; |
ea430986 | 1767 | |
9e2f7c11 | 1768 | assert(f); |
47be870b | 1769 | |
9e2f7c11 | 1770 | if (!(r = strdup(f))) |
ea430986 LP |
1771 | return NULL; |
1772 | ||
9e2f7c11 | 1773 | for (t = r; *f; f++) { |
ea430986 LP |
1774 | |
1775 | if (*f == '_') { | |
1776 | int a, b; | |
1777 | ||
1778 | if ((a = unhexchar(f[1])) < 0 || | |
1779 | (b = unhexchar(f[2])) < 0) { | |
1780 | /* Invalid escape code, let's take it literal then */ | |
1781 | *(t++) = '_'; | |
1782 | } else { | |
1783 | *(t++) = (char) ((a << 4) | b); | |
1784 | f += 2; | |
1785 | } | |
1786 | } else | |
1787 | *(t++) = *f; | |
1788 | } | |
1789 | ||
1790 | *t = 0; | |
1791 | ||
1792 | return r; | |
1793 | } | |
1794 | ||
67d51650 | 1795 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1796 | char *p; |
1797 | ||
67d51650 | 1798 | assert(t); |
4fe88d28 | 1799 | |
67d51650 | 1800 | for (p = t; *p; p++) |
4fe88d28 LP |
1801 | if (*p >= 'A' && *p <= 'Z') |
1802 | *p = *p - 'A' + 'a'; | |
1803 | ||
67d51650 | 1804 | return t; |
4fe88d28 | 1805 | } |
1dccbe19 | 1806 | |
a228a22f | 1807 | static bool ignore_file_allow_backup(const char *filename) { |
c85dc17b LP |
1808 | assert(filename); |
1809 | ||
1810 | return | |
1811 | filename[0] == '.' || | |
6c78be3c | 1812 | streq(filename, "lost+found") || |
e472d476 LP |
1813 | streq(filename, "aquota.user") || |
1814 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1815 | endswith(filename, ".rpmnew") || |
1816 | endswith(filename, ".rpmsave") || | |
1817 | endswith(filename, ".rpmorig") || | |
1818 | endswith(filename, ".dpkg-old") || | |
1819 | endswith(filename, ".dpkg-new") || | |
1820 | endswith(filename, ".swp"); | |
1821 | } | |
1822 | ||
a228a22f LP |
1823 | bool ignore_file(const char *filename) { |
1824 | assert(filename); | |
1825 | ||
1826 | if (endswith(filename, "~")) | |
1827 | return false; | |
1828 | ||
1829 | return ignore_file_allow_backup(filename); | |
1830 | } | |
1831 | ||
3a0ecb08 LP |
1832 | int fd_nonblock(int fd, bool nonblock) { |
1833 | int flags; | |
1834 | ||
1835 | assert(fd >= 0); | |
1836 | ||
1837 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1838 | return -errno; | |
1839 | ||
1840 | if (nonblock) | |
1841 | flags |= O_NONBLOCK; | |
1842 | else | |
1843 | flags &= ~O_NONBLOCK; | |
1844 | ||
1845 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1846 | return -errno; | |
1847 | ||
1848 | return 0; | |
1849 | } | |
1850 | ||
1851 | int fd_cloexec(int fd, bool cloexec) { | |
1852 | int flags; | |
1853 | ||
1854 | assert(fd >= 0); | |
1855 | ||
1856 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1857 | return -errno; | |
1858 | ||
1859 | if (cloexec) | |
1860 | flags |= FD_CLOEXEC; | |
1861 | else | |
1862 | flags &= ~FD_CLOEXEC; | |
1863 | ||
1864 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1865 | return -errno; | |
1866 | ||
1867 | return 0; | |
1868 | } | |
1869 | ||
b19be9eb LP |
1870 | static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
1871 | unsigned i; | |
1872 | ||
1873 | assert(n_fdset == 0 || fdset); | |
1874 | ||
1875 | for (i = 0; i < n_fdset; i++) | |
1876 | if (fdset[i] == fd) | |
1877 | return true; | |
1878 | ||
1879 | return false; | |
1880 | } | |
1881 | ||
a0d40ac5 LP |
1882 | int close_all_fds(const int except[], unsigned n_except) { |
1883 | DIR *d; | |
1884 | struct dirent *de; | |
1885 | int r = 0; | |
1886 | ||
b19be9eb LP |
1887 | assert(n_except == 0 || except); |
1888 | ||
1889 | d = opendir("/proc/self/fd"); | |
1890 | if (!d) { | |
1891 | int fd; | |
1892 | struct rlimit rl; | |
1893 | ||
1894 | /* When /proc isn't available (for example in chroots) | |
1895 | * the fallback is brute forcing through the fd | |
1896 | * table */ | |
1897 | ||
1898 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1899 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1900 | ||
1901 | if (fd_in_set(fd, except, n_except)) | |
1902 | continue; | |
1903 | ||
1904 | if (close_nointr(fd) < 0) | |
1905 | if (errno != EBADF && r == 0) | |
1906 | r = -errno; | |
1907 | } | |
1908 | ||
1909 | return r; | |
1910 | } | |
a0d40ac5 LP |
1911 | |
1912 | while ((de = readdir(d))) { | |
a7610064 | 1913 | int fd = -1; |
a0d40ac5 | 1914 | |
a16e1123 | 1915 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1916 | continue; |
1917 | ||
720ce21d LP |
1918 | if (safe_atoi(de->d_name, &fd) < 0) |
1919 | /* Let's better ignore this, just in case */ | |
1920 | continue; | |
a0d40ac5 LP |
1921 | |
1922 | if (fd < 3) | |
1923 | continue; | |
1924 | ||
1925 | if (fd == dirfd(d)) | |
1926 | continue; | |
1927 | ||
b19be9eb LP |
1928 | if (fd_in_set(fd, except, n_except)) |
1929 | continue; | |
a0d40ac5 | 1930 | |
720ce21d | 1931 | if (close_nointr(fd) < 0) { |
2f357920 | 1932 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1933 | if (errno != EBADF && r == 0) |
1934 | r = -errno; | |
2f357920 | 1935 | } |
a0d40ac5 LP |
1936 | } |
1937 | ||
a0d40ac5 LP |
1938 | closedir(d); |
1939 | return r; | |
1940 | } | |
1941 | ||
db12775d LP |
1942 | bool chars_intersect(const char *a, const char *b) { |
1943 | const char *p; | |
1944 | ||
1945 | /* Returns true if any of the chars in a are in b. */ | |
1946 | for (p = a; *p; p++) | |
1947 | if (strchr(b, *p)) | |
1948 | return true; | |
1949 | ||
1950 | return false; | |
1951 | } | |
1952 | ||
8b6c7120 LP |
1953 | char *format_timestamp(char *buf, size_t l, usec_t t) { |
1954 | struct tm tm; | |
1955 | time_t sec; | |
1956 | ||
1957 | assert(buf); | |
1958 | assert(l > 0); | |
1959 | ||
1960 | if (t <= 0) | |
1961 | return NULL; | |
1962 | ||
f872ec33 | 1963 | sec = (time_t) (t / USEC_PER_SEC); |
8b6c7120 | 1964 | |
6d0274f1 | 1965 | if (strftime(buf, l, "%a, %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm)) <= 0) |
8b6c7120 LP |
1966 | return NULL; |
1967 | ||
1968 | return buf; | |
1969 | } | |
1970 | ||
584be568 LP |
1971 | char *format_timestamp_pretty(char *buf, size_t l, usec_t t) { |
1972 | usec_t n, d; | |
1973 | ||
1974 | n = now(CLOCK_REALTIME); | |
1975 | ||
1976 | if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) | |
1977 | return NULL; | |
1978 | ||
1979 | d = n - t; | |
1980 | ||
1981 | if (d >= USEC_PER_YEAR) | |
1982 | snprintf(buf, l, "%llu years and %llu months ago", | |
1983 | (unsigned long long) (d / USEC_PER_YEAR), | |
1984 | (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); | |
1985 | else if (d >= USEC_PER_MONTH) | |
1986 | snprintf(buf, l, "%llu months and %llu days ago", | |
1987 | (unsigned long long) (d / USEC_PER_MONTH), | |
1988 | (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); | |
1989 | else if (d >= USEC_PER_WEEK) | |
1990 | snprintf(buf, l, "%llu weeks and %llu days ago", | |
1991 | (unsigned long long) (d / USEC_PER_WEEK), | |
1992 | (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); | |
1993 | else if (d >= 2*USEC_PER_DAY) | |
1994 | snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); | |
1995 | else if (d >= 25*USEC_PER_HOUR) | |
1996 | snprintf(buf, l, "1 day and %lluh ago", | |
1997 | (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); | |
1998 | else if (d >= 6*USEC_PER_HOUR) | |
1999 | snprintf(buf, l, "%lluh ago", | |
2000 | (unsigned long long) (d / USEC_PER_HOUR)); | |
2001 | else if (d >= USEC_PER_HOUR) | |
2002 | snprintf(buf, l, "%lluh %llumin ago", | |
2003 | (unsigned long long) (d / USEC_PER_HOUR), | |
2004 | (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); | |
2005 | else if (d >= 5*USEC_PER_MINUTE) | |
2006 | snprintf(buf, l, "%llumin ago", | |
2007 | (unsigned long long) (d / USEC_PER_MINUTE)); | |
2008 | else if (d >= USEC_PER_MINUTE) | |
2009 | snprintf(buf, l, "%llumin %llus ago", | |
2010 | (unsigned long long) (d / USEC_PER_MINUTE), | |
2011 | (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); | |
2012 | else if (d >= USEC_PER_SEC) | |
2013 | snprintf(buf, l, "%llus ago", | |
2014 | (unsigned long long) (d / USEC_PER_SEC)); | |
2015 | else if (d >= USEC_PER_MSEC) | |
2016 | snprintf(buf, l, "%llums ago", | |
2017 | (unsigned long long) (d / USEC_PER_MSEC)); | |
2018 | else if (d > 0) | |
2019 | snprintf(buf, l, "%lluus ago", | |
2020 | (unsigned long long) d); | |
2021 | else | |
2022 | snprintf(buf, l, "now"); | |
2023 | ||
2024 | buf[l-1] = 0; | |
2025 | return buf; | |
2026 | } | |
2027 | ||
871d7de4 LP |
2028 | char *format_timespan(char *buf, size_t l, usec_t t) { |
2029 | static const struct { | |
2030 | const char *suffix; | |
2031 | usec_t usec; | |
2032 | } table[] = { | |
2033 | { "w", USEC_PER_WEEK }, | |
2034 | { "d", USEC_PER_DAY }, | |
2035 | { "h", USEC_PER_HOUR }, | |
2036 | { "min", USEC_PER_MINUTE }, | |
2037 | { "s", USEC_PER_SEC }, | |
2038 | { "ms", USEC_PER_MSEC }, | |
2039 | { "us", 1 }, | |
2040 | }; | |
2041 | ||
2042 | unsigned i; | |
2043 | char *p = buf; | |
2044 | ||
2045 | assert(buf); | |
2046 | assert(l > 0); | |
2047 | ||
2048 | if (t == (usec_t) -1) | |
2049 | return NULL; | |
2050 | ||
4502d22c LP |
2051 | if (t == 0) { |
2052 | snprintf(p, l, "0"); | |
2053 | p[l-1] = 0; | |
2054 | return p; | |
2055 | } | |
2056 | ||
871d7de4 LP |
2057 | /* The result of this function can be parsed with parse_usec */ |
2058 | ||
2059 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
2060 | int k; | |
2061 | size_t n; | |
2062 | ||
2063 | if (t < table[i].usec) | |
2064 | continue; | |
2065 | ||
2066 | if (l <= 1) | |
2067 | break; | |
2068 | ||
2069 | k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix); | |
2070 | n = MIN((size_t) k, l); | |
2071 | ||
2072 | l -= n; | |
2073 | p += n; | |
2074 | ||
2075 | t %= table[i].usec; | |
2076 | } | |
2077 | ||
2078 | *p = 0; | |
2079 | ||
2080 | return buf; | |
2081 | } | |
2082 | ||
42856c10 | 2083 | bool fstype_is_network(const char *fstype) { |
a05f97b3 LP |
2084 | static const char table[] = |
2085 | "cifs\0" | |
2086 | "smbfs\0" | |
2087 | "ncpfs\0" | |
2088 | "nfs\0" | |
2089 | "nfs4\0" | |
2090 | "gfs\0" | |
73836c5c | 2091 | "gfs2\0"; |
42856c10 | 2092 | |
a05f97b3 | 2093 | return nulstr_contains(table, fstype); |
42856c10 LP |
2094 | } |
2095 | ||
601f6a1e | 2096 | int chvt(int vt) { |
a05f97b3 | 2097 | _cleanup_close_ int fd; |
601f6a1e | 2098 | |
a05f97b3 LP |
2099 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
2100 | if (fd < 0) | |
601f6a1e LP |
2101 | return -errno; |
2102 | ||
2103 | if (vt < 0) { | |
2104 | int tiocl[2] = { | |
2105 | TIOCL_GETKMSGREDIRECT, | |
2106 | 0 | |
2107 | }; | |
2108 | ||
a05f97b3 LP |
2109 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
2110 | return -errno; | |
601f6a1e LP |
2111 | |
2112 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
2113 | } | |
2114 | ||
2115 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 2116 | return -errno; |
601f6a1e | 2117 | |
a05f97b3 | 2118 | return 0; |
601f6a1e LP |
2119 | } |
2120 | ||
8f2d43a0 | 2121 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 LP |
2122 | struct termios old_termios, new_termios; |
2123 | char c; | |
20c03b7b | 2124 | char line[LINE_MAX]; |
80876c20 LP |
2125 | |
2126 | assert(f); | |
2127 | assert(ret); | |
2128 | ||
2129 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
2130 | new_termios = old_termios; | |
2131 | ||
2132 | new_termios.c_lflag &= ~ICANON; | |
2133 | new_termios.c_cc[VMIN] = 1; | |
2134 | new_termios.c_cc[VTIME] = 0; | |
2135 | ||
2136 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
2137 | size_t k; | |
2138 | ||
8f2d43a0 LP |
2139 | if (t != (usec_t) -1) { |
2140 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { | |
2141 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2142 | return -ETIMEDOUT; | |
2143 | } | |
2144 | } | |
2145 | ||
80876c20 LP |
2146 | k = fread(&c, 1, 1, f); |
2147 | ||
2148 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
2149 | ||
2150 | if (k <= 0) | |
2151 | return -EIO; | |
2152 | ||
2153 | if (need_nl) | |
2154 | *need_nl = c != '\n'; | |
2155 | ||
2156 | *ret = c; | |
2157 | return 0; | |
2158 | } | |
2159 | } | |
2160 | ||
8f2d43a0 LP |
2161 | if (t != (usec_t) -1) |
2162 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) | |
2163 | return -ETIMEDOUT; | |
2164 | ||
2165 | if (!fgets(line, sizeof(line), f)) | |
80876c20 LP |
2166 | return -EIO; |
2167 | ||
2168 | truncate_nl(line); | |
2169 | ||
2170 | if (strlen(line) != 1) | |
2171 | return -EBADMSG; | |
2172 | ||
2173 | if (need_nl) | |
2174 | *need_nl = false; | |
2175 | ||
2176 | *ret = line[0]; | |
2177 | return 0; | |
2178 | } | |
2179 | ||
2180 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1b39d4b9 | 2181 | |
80876c20 LP |
2182 | assert(ret); |
2183 | assert(replies); | |
2184 | assert(text); | |
2185 | ||
2186 | for (;;) { | |
2187 | va_list ap; | |
2188 | char c; | |
2189 | int r; | |
2190 | bool need_nl = true; | |
2191 | ||
8481248b | 2192 | if (on_tty()) |
c1072ea0 | 2193 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 2194 | |
80876c20 LP |
2195 | va_start(ap, text); |
2196 | vprintf(text, ap); | |
2197 | va_end(ap); | |
2198 | ||
8481248b | 2199 | if (on_tty()) |
c1072ea0 | 2200 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 2201 | |
80876c20 LP |
2202 | fflush(stdout); |
2203 | ||
8f2d43a0 LP |
2204 | r = read_one_char(stdin, &c, (usec_t) -1, &need_nl); |
2205 | if (r < 0) { | |
80876c20 LP |
2206 | |
2207 | if (r == -EBADMSG) { | |
2208 | puts("Bad input, please try again."); | |
2209 | continue; | |
2210 | } | |
2211 | ||
2212 | putchar('\n'); | |
2213 | return r; | |
2214 | } | |
2215 | ||
2216 | if (need_nl) | |
2217 | putchar('\n'); | |
2218 | ||
2219 | if (strchr(replies, c)) { | |
2220 | *ret = c; | |
2221 | return 0; | |
2222 | } | |
2223 | ||
2224 | puts("Read unexpected character, please try again."); | |
2225 | } | |
2226 | } | |
2227 | ||
512947d4 | 2228 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
2229 | struct termios termios; |
2230 | int r = 0; | |
3fe5e5d4 LP |
2231 | |
2232 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
2233 | |
2234 | assert(fd >= 0); | |
2235 | ||
eed1d0e3 LP |
2236 | /* We leave locked terminal attributes untouched, so that |
2237 | * Plymouth may set whatever it wants to set, and we don't | |
2238 | * interfere with that. */ | |
3fe5e5d4 LP |
2239 | |
2240 | /* Disable exclusive mode, just in case */ | |
2241 | ioctl(fd, TIOCNXCL); | |
2242 | ||
5c0100a5 | 2243 | /* Switch to text mode */ |
512947d4 MS |
2244 | if (switch_to_text) |
2245 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 2246 | |
3fe5e5d4 | 2247 | /* Enable console unicode mode */ |
df465b3f | 2248 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
2249 | |
2250 | if (tcgetattr(fd, &termios) < 0) { | |
2251 | r = -errno; | |
2252 | goto finish; | |
2253 | } | |
2254 | ||
aaf694ca LP |
2255 | /* We only reset the stuff that matters to the software. How |
2256 | * hardware is set up we don't touch assuming that somebody | |
2257 | * else will do that for us */ | |
2258 | ||
2259 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
2260 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
2261 | termios.c_oflag |= ONLCR; | |
2262 | termios.c_cflag |= CREAD; | |
2263 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
2264 | ||
2265 | termios.c_cc[VINTR] = 03; /* ^C */ | |
2266 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
2267 | termios.c_cc[VERASE] = 0177; | |
2268 | termios.c_cc[VKILL] = 025; /* ^X */ | |
2269 | termios.c_cc[VEOF] = 04; /* ^D */ | |
2270 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
2271 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
2272 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
2273 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
2274 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
2275 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
2276 | termios.c_cc[VEOL] = 0; |
2277 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
2278 | |
2279 | termios.c_cc[VTIME] = 0; | |
2280 | termios.c_cc[VMIN] = 1; | |
2281 | ||
2282 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
2283 | r = -errno; | |
2284 | ||
2285 | finish: | |
2286 | /* Just in case, flush all crap out */ | |
2287 | tcflush(fd, TCIOFLUSH); | |
2288 | ||
2289 | return r; | |
2290 | } | |
2291 | ||
6ea832a2 LP |
2292 | int reset_terminal(const char *name) { |
2293 | int fd, r; | |
2294 | ||
2295 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
2296 | if (fd < 0) | |
2297 | return fd; | |
2298 | ||
512947d4 | 2299 | r = reset_terminal_fd(fd, true); |
6ea832a2 LP |
2300 | close_nointr_nofail(fd); |
2301 | ||
2302 | return r; | |
2303 | } | |
2304 | ||
80876c20 LP |
2305 | int open_terminal(const char *name, int mode) { |
2306 | int fd, r; | |
f73f76ac | 2307 | unsigned c = 0; |
80876c20 | 2308 | |
f73f76ac LP |
2309 | /* |
2310 | * If a TTY is in the process of being closed opening it might | |
2311 | * cause EIO. This is horribly awful, but unlikely to be | |
2312 | * changed in the kernel. Hence we work around this problem by | |
2313 | * retrying a couple of times. | |
2314 | * | |
2315 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
2316 | */ | |
2317 | ||
2318 | for (;;) { | |
af6da548 LP |
2319 | fd = open(name, mode); |
2320 | if (fd >= 0) | |
f73f76ac LP |
2321 | break; |
2322 | ||
2323 | if (errno != EIO) | |
2324 | return -errno; | |
2325 | ||
af6da548 | 2326 | /* Max 1s in total */ |
f73f76ac LP |
2327 | if (c >= 20) |
2328 | return -errno; | |
2329 | ||
2330 | usleep(50 * USEC_PER_MSEC); | |
2331 | c++; | |
2332 | } | |
2333 | ||
2334 | if (fd < 0) | |
80876c20 LP |
2335 | return -errno; |
2336 | ||
af6da548 LP |
2337 | r = isatty(fd); |
2338 | if (r < 0) { | |
80876c20 LP |
2339 | close_nointr_nofail(fd); |
2340 | return -errno; | |
2341 | } | |
2342 | ||
2343 | if (!r) { | |
2344 | close_nointr_nofail(fd); | |
2345 | return -ENOTTY; | |
2346 | } | |
2347 | ||
2348 | return fd; | |
2349 | } | |
2350 | ||
2351 | int flush_fd(int fd) { | |
2352 | struct pollfd pollfd; | |
2353 | ||
2354 | zero(pollfd); | |
2355 | pollfd.fd = fd; | |
2356 | pollfd.events = POLLIN; | |
2357 | ||
2358 | for (;;) { | |
20c03b7b | 2359 | char buf[LINE_MAX]; |
80876c20 LP |
2360 | ssize_t l; |
2361 | int r; | |
2362 | ||
2363 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2364 | ||
2365 | if (errno == EINTR) | |
2366 | continue; | |
2367 | ||
2368 | return -errno; | |
2369 | } | |
2370 | ||
2371 | if (r == 0) | |
2372 | return 0; | |
2373 | ||
2374 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2375 | ||
2376 | if (errno == EINTR) | |
2377 | continue; | |
2378 | ||
2379 | if (errno == EAGAIN) | |
2380 | return 0; | |
2381 | ||
2382 | return -errno; | |
2383 | } | |
2384 | ||
2385 | if (l <= 0) | |
2386 | return 0; | |
2387 | } | |
2388 | } | |
2389 | ||
af6da548 LP |
2390 | int acquire_terminal( |
2391 | const char *name, | |
2392 | bool fail, | |
2393 | bool force, | |
2394 | bool ignore_tiocstty_eperm, | |
2395 | usec_t timeout) { | |
2396 | ||
4a0ff478 | 2397 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 2398 | usec_t ts = 0; |
32c4bef8 | 2399 | struct sigaction sa_old, sa_new; |
80876c20 LP |
2400 | |
2401 | assert(name); | |
2402 | ||
2403 | /* We use inotify to be notified when the tty is closed. We | |
2404 | * create the watch before checking if we can actually acquire | |
2405 | * it, so that we don't lose any event. | |
2406 | * | |
2407 | * Note: strictly speaking this actually watches for the | |
2408 | * device being closed, it does *not* really watch whether a | |
2409 | * tty loses its controlling process. However, unless some | |
2410 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2411 | * its tty otherwise this will not become a problem. As long | |
2412 | * as the administrator makes sure not configure any service | |
2413 | * on the same tty as an untrusted user this should not be a | |
2414 | * problem. (Which he probably should not do anyway.) */ | |
2415 | ||
af6da548 LP |
2416 | if (timeout != (usec_t) -1) |
2417 | ts = now(CLOCK_MONOTONIC); | |
2418 | ||
80876c20 | 2419 | if (!fail && !force) { |
af6da548 LP |
2420 | notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0)); |
2421 | if (notify < 0) { | |
80876c20 LP |
2422 | r = -errno; |
2423 | goto fail; | |
2424 | } | |
2425 | ||
af6da548 LP |
2426 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
2427 | if (wd < 0) { | |
80876c20 LP |
2428 | r = -errno; |
2429 | goto fail; | |
2430 | } | |
2431 | } | |
2432 | ||
2433 | for (;;) { | |
af6da548 LP |
2434 | if (notify >= 0) { |
2435 | r = flush_fd(notify); | |
2436 | if (r < 0) | |
e3d1855b | 2437 | goto fail; |
af6da548 | 2438 | } |
80876c20 LP |
2439 | |
2440 | /* We pass here O_NOCTTY only so that we can check the return | |
2441 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2442 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
2443 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
2444 | if (fd < 0) | |
6ea832a2 | 2445 | return fd; |
80876c20 | 2446 | |
32c4bef8 LP |
2447 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2448 | * if we already own the tty. */ | |
2449 | zero(sa_new); | |
2450 | sa_new.sa_handler = SIG_IGN; | |
2451 | sa_new.sa_flags = SA_RESTART; | |
2452 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2453 | ||
80876c20 | 2454 | /* First, try to get the tty */ |
32c4bef8 LP |
2455 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
2456 | r = -errno; | |
2457 | ||
2458 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
2459 | |
2460 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2461 | * returning EPERM, i.e. when very likely we already | |
2462 | * are have this controlling terminal. */ | |
32c4bef8 | 2463 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
2464 | r = 0; |
2465 | ||
32c4bef8 | 2466 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
2467 | goto fail; |
2468 | } | |
2469 | ||
2470 | if (r >= 0) | |
2471 | break; | |
2472 | ||
2473 | assert(!fail); | |
2474 | assert(!force); | |
2475 | assert(notify >= 0); | |
2476 | ||
2477 | for (;;) { | |
f601daa7 | 2478 | uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX]; |
80876c20 | 2479 | ssize_t l; |
f601daa7 | 2480 | struct inotify_event *e; |
80876c20 | 2481 | |
af6da548 LP |
2482 | if (timeout != (usec_t) -1) { |
2483 | usec_t n; | |
2484 | ||
2485 | n = now(CLOCK_MONOTONIC); | |
2486 | if (ts + timeout < n) { | |
2487 | r = -ETIMEDOUT; | |
2488 | goto fail; | |
2489 | } | |
2490 | ||
2491 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
2492 | if (r < 0) | |
2493 | goto fail; | |
2494 | ||
2495 | if (r == 0) { | |
2496 | r = -ETIMEDOUT; | |
2497 | goto fail; | |
2498 | } | |
2499 | } | |
2500 | ||
2501 | l = read(notify, inotify_buffer, sizeof(inotify_buffer)); | |
2502 | if (l < 0) { | |
80876c20 | 2503 | |
af6da548 | 2504 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
2505 | continue; |
2506 | ||
2507 | r = -errno; | |
2508 | goto fail; | |
2509 | } | |
2510 | ||
2511 | e = (struct inotify_event*) inotify_buffer; | |
80876c20 | 2512 | |
f601daa7 LP |
2513 | while (l > 0) { |
2514 | size_t step; | |
80876c20 | 2515 | |
f601daa7 | 2516 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2517 | r = -EIO; |
f601daa7 LP |
2518 | goto fail; |
2519 | } | |
80876c20 | 2520 | |
f601daa7 LP |
2521 | step = sizeof(struct inotify_event) + e->len; |
2522 | assert(step <= (size_t) l); | |
80876c20 | 2523 | |
f601daa7 LP |
2524 | e = (struct inotify_event*) ((uint8_t*) e + step); |
2525 | l -= step; | |
80876c20 LP |
2526 | } |
2527 | ||
2528 | break; | |
2529 | } | |
2530 | ||
2531 | /* We close the tty fd here since if the old session | |
2532 | * ended our handle will be dead. It's important that | |
2533 | * we do this after sleeping, so that we don't enter | |
2534 | * an endless loop. */ | |
2535 | close_nointr_nofail(fd); | |
2536 | } | |
2537 | ||
2538 | if (notify >= 0) | |
a16e1123 | 2539 | close_nointr_nofail(notify); |
80876c20 | 2540 | |
512947d4 MS |
2541 | r = reset_terminal_fd(fd, true); |
2542 | if (r < 0) | |
80876c20 LP |
2543 | log_warning("Failed to reset terminal: %s", strerror(-r)); |
2544 | ||
2545 | return fd; | |
2546 | ||
2547 | fail: | |
2548 | if (fd >= 0) | |
a16e1123 | 2549 | close_nointr_nofail(fd); |
80876c20 LP |
2550 | |
2551 | if (notify >= 0) | |
a16e1123 | 2552 | close_nointr_nofail(notify); |
80876c20 LP |
2553 | |
2554 | return r; | |
2555 | } | |
2556 | ||
2557 | int release_terminal(void) { | |
2558 | int r = 0, fd; | |
57cd2192 | 2559 | struct sigaction sa_old, sa_new; |
80876c20 | 2560 | |
ccaa6149 | 2561 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0) |
80876c20 LP |
2562 | return -errno; |
2563 | ||
57cd2192 LP |
2564 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2565 | * by our own TIOCNOTTY */ | |
2566 | ||
2567 | zero(sa_new); | |
2568 | sa_new.sa_handler = SIG_IGN; | |
2569 | sa_new.sa_flags = SA_RESTART; | |
2570 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2571 | ||
80876c20 LP |
2572 | if (ioctl(fd, TIOCNOTTY) < 0) |
2573 | r = -errno; | |
2574 | ||
57cd2192 LP |
2575 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2576 | ||
80876c20 LP |
2577 | close_nointr_nofail(fd); |
2578 | return r; | |
2579 | } | |
2580 | ||
9a34ec5f LP |
2581 | int sigaction_many(const struct sigaction *sa, ...) { |
2582 | va_list ap; | |
2583 | int r = 0, sig; | |
2584 | ||
2585 | va_start(ap, sa); | |
2586 | while ((sig = va_arg(ap, int)) > 0) | |
2587 | if (sigaction(sig, sa, NULL) < 0) | |
2588 | r = -errno; | |
2589 | va_end(ap); | |
2590 | ||
2591 | return r; | |
2592 | } | |
2593 | ||
2594 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2595 | struct sigaction sa; |
9a34ec5f LP |
2596 | va_list ap; |
2597 | int r = 0; | |
a337c6fc LP |
2598 | |
2599 | zero(sa); | |
2600 | sa.sa_handler = SIG_IGN; | |
2601 | sa.sa_flags = SA_RESTART; | |
2602 | ||
9a34ec5f LP |
2603 | if (sigaction(sig, &sa, NULL) < 0) |
2604 | r = -errno; | |
2605 | ||
2606 | va_start(ap, sig); | |
2607 | while ((sig = va_arg(ap, int)) > 0) | |
2608 | if (sigaction(sig, &sa, NULL) < 0) | |
2609 | r = -errno; | |
2610 | va_end(ap); | |
2611 | ||
2612 | return r; | |
2613 | } | |
2614 | ||
2615 | int default_signals(int sig, ...) { | |
2616 | struct sigaction sa; | |
2617 | va_list ap; | |
2618 | int r = 0; | |
2619 | ||
2620 | zero(sa); | |
2621 | sa.sa_handler = SIG_DFL; | |
2622 | sa.sa_flags = SA_RESTART; | |
2623 | ||
2624 | if (sigaction(sig, &sa, NULL) < 0) | |
2625 | r = -errno; | |
2626 | ||
2627 | va_start(ap, sig); | |
2628 | while ((sig = va_arg(ap, int)) > 0) | |
2629 | if (sigaction(sig, &sa, NULL) < 0) | |
2630 | r = -errno; | |
2631 | va_end(ap); | |
2632 | ||
2633 | return r; | |
a337c6fc LP |
2634 | } |
2635 | ||
8d567588 LP |
2636 | int close_pipe(int p[]) { |
2637 | int a = 0, b = 0; | |
2638 | ||
2639 | assert(p); | |
2640 | ||
2641 | if (p[0] >= 0) { | |
2642 | a = close_nointr(p[0]); | |
2643 | p[0] = -1; | |
2644 | } | |
2645 | ||
2646 | if (p[1] >= 0) { | |
2647 | b = close_nointr(p[1]); | |
2648 | p[1] = -1; | |
2649 | } | |
2650 | ||
2651 | return a < 0 ? a : b; | |
2652 | } | |
2653 | ||
eb22ac37 | 2654 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2655 | uint8_t *p; |
2656 | ssize_t n = 0; | |
2657 | ||
2658 | assert(fd >= 0); | |
2659 | assert(buf); | |
2660 | ||
2661 | p = buf; | |
2662 | ||
2663 | while (nbytes > 0) { | |
2664 | ssize_t k; | |
2665 | ||
2666 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2667 | ||
eb22ac37 | 2668 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2669 | continue; |
2670 | ||
eb22ac37 | 2671 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2672 | struct pollfd pollfd; |
2673 | ||
2674 | zero(pollfd); | |
2675 | pollfd.fd = fd; | |
2676 | pollfd.events = POLLIN; | |
2677 | ||
2678 | if (poll(&pollfd, 1, -1) < 0) { | |
2679 | if (errno == EINTR) | |
2680 | continue; | |
2681 | ||
2682 | return n > 0 ? n : -errno; | |
2683 | } | |
2684 | ||
2685 | if (pollfd.revents != POLLIN) | |
2686 | return n > 0 ? n : -EIO; | |
2687 | ||
2688 | continue; | |
2689 | } | |
2690 | ||
2691 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2692 | } | |
2693 | ||
2694 | p += k; | |
2695 | nbytes -= k; | |
2696 | n += k; | |
2697 | } | |
2698 | ||
2699 | return n; | |
2700 | } | |
2701 | ||
eb22ac37 LP |
2702 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2703 | const uint8_t *p; | |
2704 | ssize_t n = 0; | |
2705 | ||
2706 | assert(fd >= 0); | |
2707 | assert(buf); | |
2708 | ||
2709 | p = buf; | |
2710 | ||
2711 | while (nbytes > 0) { | |
2712 | ssize_t k; | |
2713 | ||
fe652127 LP |
2714 | k = write(fd, p, nbytes); |
2715 | if (k <= 0) { | |
eb22ac37 LP |
2716 | |
2717 | if (k < 0 && errno == EINTR) | |
2718 | continue; | |
2719 | ||
2720 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2721 | struct pollfd pollfd; | |
2722 | ||
2723 | zero(pollfd); | |
2724 | pollfd.fd = fd; | |
2725 | pollfd.events = POLLOUT; | |
2726 | ||
2727 | if (poll(&pollfd, 1, -1) < 0) { | |
2728 | if (errno == EINTR) | |
2729 | continue; | |
2730 | ||
2731 | return n > 0 ? n : -errno; | |
2732 | } | |
2733 | ||
2734 | if (pollfd.revents != POLLOUT) | |
2735 | return n > 0 ? n : -EIO; | |
2736 | ||
2737 | continue; | |
2738 | } | |
2739 | ||
2740 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2741 | } | |
2742 | ||
2743 | p += k; | |
2744 | nbytes -= k; | |
2745 | n += k; | |
2746 | } | |
2747 | ||
2748 | return n; | |
2749 | } | |
2750 | ||
24a6e4a4 LP |
2751 | int parse_usec(const char *t, usec_t *usec) { |
2752 | static const struct { | |
2753 | const char *suffix; | |
2754 | usec_t usec; | |
2755 | } table[] = { | |
cfbc22ab LP |
2756 | { "seconds", USEC_PER_SEC }, |
2757 | { "second", USEC_PER_SEC }, | |
24a6e4a4 LP |
2758 | { "sec", USEC_PER_SEC }, |
2759 | { "s", USEC_PER_SEC }, | |
cfbc22ab LP |
2760 | { "minutes", USEC_PER_MINUTE }, |
2761 | { "minute", USEC_PER_MINUTE }, | |
24a6e4a4 | 2762 | { "min", USEC_PER_MINUTE }, |
cfbc22ab LP |
2763 | { "months", USEC_PER_MONTH }, |
2764 | { "month", USEC_PER_MONTH }, | |
2765 | { "msec", USEC_PER_MSEC }, | |
2766 | { "ms", USEC_PER_MSEC }, | |
2767 | { "m", USEC_PER_MINUTE }, | |
2768 | { "hours", USEC_PER_HOUR }, | |
2769 | { "hour", USEC_PER_HOUR }, | |
24a6e4a4 LP |
2770 | { "hr", USEC_PER_HOUR }, |
2771 | { "h", USEC_PER_HOUR }, | |
cfbc22ab LP |
2772 | { "days", USEC_PER_DAY }, |
2773 | { "day", USEC_PER_DAY }, | |
24a6e4a4 | 2774 | { "d", USEC_PER_DAY }, |
cfbc22ab LP |
2775 | { "weeks", USEC_PER_WEEK }, |
2776 | { "week", USEC_PER_WEEK }, | |
24a6e4a4 | 2777 | { "w", USEC_PER_WEEK }, |
cfbc22ab LP |
2778 | { "years", USEC_PER_YEAR }, |
2779 | { "year", USEC_PER_YEAR }, | |
2780 | { "y", USEC_PER_YEAR }, | |
24a6e4a4 LP |
2781 | { "usec", 1ULL }, |
2782 | { "us", 1ULL }, | |
d88a251b | 2783 | { "", USEC_PER_SEC }, /* default is sec */ |
24a6e4a4 LP |
2784 | }; |
2785 | ||
2786 | const char *p; | |
2787 | usec_t r = 0; | |
2788 | ||
2789 | assert(t); | |
2790 | assert(usec); | |
2791 | ||
2792 | p = t; | |
2793 | do { | |
2794 | long long l; | |
2795 | char *e; | |
2796 | unsigned i; | |
2797 | ||
2798 | errno = 0; | |
2799 | l = strtoll(p, &e, 10); | |
2800 | ||
2801 | if (errno != 0) | |
2802 | return -errno; | |
2803 | ||
2804 | if (l < 0) | |
2805 | return -ERANGE; | |
2806 | ||
2807 | if (e == p) | |
2808 | return -EINVAL; | |
2809 | ||
2810 | e += strspn(e, WHITESPACE); | |
2811 | ||
2812 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2813 | if (startswith(e, table[i].suffix)) { | |
2814 | r += (usec_t) l * table[i].usec; | |
2815 | p = e + strlen(table[i].suffix); | |
2816 | break; | |
2817 | } | |
2818 | ||
2819 | if (i >= ELEMENTSOF(table)) | |
2820 | return -EINVAL; | |
2821 | ||
2822 | } while (*p != 0); | |
2823 | ||
2824 | *usec = r; | |
2825 | ||
2826 | return 0; | |
2827 | } | |
2828 | ||
d88a251b LP |
2829 | int parse_nsec(const char *t, nsec_t *nsec) { |
2830 | static const struct { | |
2831 | const char *suffix; | |
2832 | nsec_t nsec; | |
2833 | } table[] = { | |
cfbc22ab LP |
2834 | { "seconds", NSEC_PER_SEC }, |
2835 | { "second", NSEC_PER_SEC }, | |
d88a251b LP |
2836 | { "sec", NSEC_PER_SEC }, |
2837 | { "s", NSEC_PER_SEC }, | |
cfbc22ab LP |
2838 | { "minutes", NSEC_PER_MINUTE }, |
2839 | { "minute", NSEC_PER_MINUTE }, | |
d88a251b | 2840 | { "min", NSEC_PER_MINUTE }, |
cfbc22ab LP |
2841 | { "months", NSEC_PER_MONTH }, |
2842 | { "month", NSEC_PER_MONTH }, | |
2843 | { "msec", NSEC_PER_MSEC }, | |
2844 | { "ms", NSEC_PER_MSEC }, | |
2845 | { "m", NSEC_PER_MINUTE }, | |
2846 | { "hours", NSEC_PER_HOUR }, | |
2847 | { "hour", NSEC_PER_HOUR }, | |
d88a251b LP |
2848 | { "hr", NSEC_PER_HOUR }, |
2849 | { "h", NSEC_PER_HOUR }, | |
cfbc22ab LP |
2850 | { "days", NSEC_PER_DAY }, |
2851 | { "day", NSEC_PER_DAY }, | |
d88a251b | 2852 | { "d", NSEC_PER_DAY }, |
cfbc22ab LP |
2853 | { "weeks", NSEC_PER_WEEK }, |
2854 | { "week", NSEC_PER_WEEK }, | |
d88a251b | 2855 | { "w", NSEC_PER_WEEK }, |
cfbc22ab LP |
2856 | { "years", NSEC_PER_YEAR }, |
2857 | { "year", NSEC_PER_YEAR }, | |
2858 | { "y", NSEC_PER_YEAR }, | |
d88a251b LP |
2859 | { "usec", NSEC_PER_USEC }, |
2860 | { "us", NSEC_PER_USEC }, | |
2861 | { "nsec", 1ULL }, | |
2862 | { "ns", 1ULL }, | |
2863 | { "", 1ULL }, /* default is nsec */ | |
2864 | }; | |
2865 | ||
2866 | const char *p; | |
2867 | nsec_t r = 0; | |
2868 | ||
2869 | assert(t); | |
2870 | assert(nsec); | |
2871 | ||
2872 | p = t; | |
2873 | do { | |
2874 | long long l; | |
2875 | char *e; | |
2876 | unsigned i; | |
2877 | ||
2878 | errno = 0; | |
2879 | l = strtoll(p, &e, 10); | |
2880 | ||
2881 | if (errno != 0) | |
2882 | return -errno; | |
2883 | ||
2884 | if (l < 0) | |
2885 | return -ERANGE; | |
2886 | ||
2887 | if (e == p) | |
2888 | return -EINVAL; | |
2889 | ||
2890 | e += strspn(e, WHITESPACE); | |
2891 | ||
2892 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2893 | if (startswith(e, table[i].suffix)) { | |
2894 | r += (nsec_t) l * table[i].nsec; | |
2895 | p = e + strlen(table[i].suffix); | |
2896 | break; | |
2897 | } | |
2898 | ||
2899 | if (i >= ELEMENTSOF(table)) | |
2900 | return -EINVAL; | |
2901 | ||
2902 | } while (*p != 0); | |
2903 | ||
2904 | *nsec = r; | |
2905 | ||
2906 | return 0; | |
2907 | } | |
2908 | ||
ab1f0633 LP |
2909 | int parse_bytes(const char *t, off_t *bytes) { |
2910 | static const struct { | |
2911 | const char *suffix; | |
2912 | off_t factor; | |
2913 | } table[] = { | |
2914 | { "B", 1 }, | |
2915 | { "K", 1024ULL }, | |
2916 | { "M", 1024ULL*1024ULL }, | |
2917 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2918 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
32895bb3 LP |
2919 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2920 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
ab1f0633 LP |
2921 | { "", 1 }, |
2922 | }; | |
2923 | ||
2924 | const char *p; | |
2925 | off_t r = 0; | |
2926 | ||
2927 | assert(t); | |
2928 | assert(bytes); | |
2929 | ||
2930 | p = t; | |
2931 | do { | |
2932 | long long l; | |
2933 | char *e; | |
2934 | unsigned i; | |
2935 | ||
2936 | errno = 0; | |
2937 | l = strtoll(p, &e, 10); | |
2938 | ||
2939 | if (errno != 0) | |
2940 | return -errno; | |
2941 | ||
2942 | if (l < 0) | |
2943 | return -ERANGE; | |
2944 | ||
2945 | if (e == p) | |
2946 | return -EINVAL; | |
2947 | ||
2948 | e += strspn(e, WHITESPACE); | |
2949 | ||
2950 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2951 | if (startswith(e, table[i].suffix)) { | |
2952 | r += (off_t) l * table[i].factor; | |
2953 | p = e + strlen(table[i].suffix); | |
2954 | break; | |
2955 | } | |
2956 | ||
2957 | if (i >= ELEMENTSOF(table)) | |
2958 | return -EINVAL; | |
2959 | ||
2960 | } while (*p != 0); | |
2961 | ||
2962 | *bytes = r; | |
2963 | ||
2964 | return 0; | |
2965 | } | |
2966 | ||
843d2643 LP |
2967 | int make_stdio(int fd) { |
2968 | int r, s, t; | |
2969 | ||
2970 | assert(fd >= 0); | |
2971 | ||
73836c5c LP |
2972 | r = dup3(fd, STDIN_FILENO, 0); |
2973 | s = dup3(fd, STDOUT_FILENO, 0); | |
2974 | t = dup3(fd, STDERR_FILENO, 0); | |
843d2643 LP |
2975 | |
2976 | if (fd >= 3) | |
2977 | close_nointr_nofail(fd); | |
2978 | ||
2979 | if (r < 0 || s < 0 || t < 0) | |
2980 | return -errno; | |
2981 | ||
73836c5c | 2982 | /* We rely here that the new fd has O_CLOEXEC not set */ |
7862f62d | 2983 | |
843d2643 LP |
2984 | return 0; |
2985 | } | |
2986 | ||
ade509ce LP |
2987 | int make_null_stdio(void) { |
2988 | int null_fd; | |
2989 | ||
cd3bd60a LP |
2990 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2991 | if (null_fd < 0) | |
ade509ce LP |
2992 | return -errno; |
2993 | ||
2994 | return make_stdio(null_fd); | |
2995 | } | |
2996 | ||
8407a5d0 LP |
2997 | bool is_device_path(const char *path) { |
2998 | ||
2999 | /* Returns true on paths that refer to a device, either in | |
3000 | * sysfs or in /dev */ | |
3001 | ||
3002 | return | |
3003 | path_startswith(path, "/dev/") || | |
3004 | path_startswith(path, "/sys/"); | |
3005 | } | |
3006 | ||
01f78473 | 3007 | int dir_is_empty(const char *path) { |
a05f97b3 | 3008 | _cleanup_closedir_ DIR *d; |
01f78473 | 3009 | int r; |
01f78473 | 3010 | |
a05f97b3 LP |
3011 | d = opendir(path); |
3012 | if (!d) | |
01f78473 LP |
3013 | return -errno; |
3014 | ||
3015 | for (;;) { | |
7d5e9c0f LP |
3016 | struct dirent *de; |
3017 | union dirent_storage buf; | |
01f78473 | 3018 | |
7d5e9c0f | 3019 | r = readdir_r(d, &buf.de, &de); |
a05f97b3 LP |
3020 | if (r > 0) |
3021 | return -r; | |
01f78473 | 3022 | |
a05f97b3 LP |
3023 | if (!de) |
3024 | return 1; | |
01f78473 | 3025 | |
a05f97b3 LP |
3026 | if (!ignore_file(de->d_name)) |
3027 | return 0; | |
3028 | } | |
01f78473 LP |
3029 | } |
3030 | ||
d3782d60 | 3031 | unsigned long long random_ull(void) { |
a05f97b3 | 3032 | _cleanup_close_ int fd; |
d3782d60 LP |
3033 | uint64_t ull; |
3034 | ssize_t r; | |
3035 | ||
ac0930c8 LP |
3036 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
3037 | if (fd < 0) | |
d3782d60 LP |
3038 | goto fallback; |
3039 | ||
eb22ac37 | 3040 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
3041 | if (r != sizeof(ull)) |
3042 | goto fallback; | |
3043 | ||
3044 | return ull; | |
3045 | ||
3046 | fallback: | |
3047 | return random() * RAND_MAX + random(); | |
3048 | } | |
3049 | ||
5b6319dc LP |
3050 | void rename_process(const char name[8]) { |
3051 | assert(name); | |
3052 | ||
5d6b1584 LP |
3053 | /* This is a like a poor man's setproctitle(). It changes the |
3054 | * comm field, argv[0], and also the glibc's internally used | |
3055 | * name of the process. For the first one a limit of 16 chars | |
3056 | * applies, to the second one usually one of 10 (i.e. length | |
3057 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
3058 | * "systemd"). If you pass a longer string it will be | |
3059 | * truncated */ | |
5b6319dc | 3060 | |
5d6b1584 | 3061 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
3062 | |
3063 | if (program_invocation_name) | |
3064 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
3065 | |
3066 | if (saved_argc > 0) { | |
3067 | int i; | |
3068 | ||
3069 | if (saved_argv[0]) | |
3070 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
3071 | ||
3072 | for (i = 1; i < saved_argc; i++) { | |
3073 | if (!saved_argv[i]) | |
3074 | break; | |
3075 | ||
3076 | memset(saved_argv[i], 0, strlen(saved_argv[i])); | |
3077 | } | |
3078 | } | |
5b6319dc LP |
3079 | } |
3080 | ||
7d793605 LP |
3081 | void sigset_add_many(sigset_t *ss, ...) { |
3082 | va_list ap; | |
3083 | int sig; | |
3084 | ||
3085 | assert(ss); | |
3086 | ||
3087 | va_start(ap, ss); | |
3088 | while ((sig = va_arg(ap, int)) > 0) | |
3089 | assert_se(sigaddset(ss, sig) == 0); | |
3090 | va_end(ap); | |
3091 | } | |
3092 | ||
ef2f1067 LP |
3093 | char* gethostname_malloc(void) { |
3094 | struct utsname u; | |
3095 | ||
3096 | assert_se(uname(&u) >= 0); | |
3097 | ||
344de609 | 3098 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
3099 | return strdup(u.nodename); |
3100 | ||
3101 | return strdup(u.sysname); | |
3102 | } | |
3103 | ||
344de609 LP |
3104 | bool hostname_is_set(void) { |
3105 | struct utsname u; | |
3106 | ||
3107 | assert_se(uname(&u) >= 0); | |
3108 | ||
3109 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
3110 | } | |
3111 | ||
7c5f152a | 3112 | static char *lookup_uid(uid_t uid) { |
ef2f1067 | 3113 | long bufsize; |
a05f97b3 LP |
3114 | char *name; |
3115 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 3116 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
3117 | |
3118 | /* Shortcut things to avoid NSS lookups */ | |
3119 | if (uid == 0) | |
3120 | return strdup("root"); | |
3121 | ||
7c5f152a LP |
3122 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
3123 | if (bufsize <= 0) | |
ef2f1067 LP |
3124 | bufsize = 4096; |
3125 | ||
7c5f152a LP |
3126 | buf = malloc(bufsize); |
3127 | if (!buf) | |
ef2f1067 LP |
3128 | return NULL; |
3129 | ||
a05f97b3 LP |
3130 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
3131 | return strdup(pw->pw_name); | |
ef2f1067 LP |
3132 | |
3133 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
3134 | return NULL; | |
3135 | ||
3136 | return name; | |
3137 | } | |
3138 | ||
7c5f152a LP |
3139 | char* getlogname_malloc(void) { |
3140 | uid_t uid; | |
3141 | struct stat st; | |
3142 | ||
3143 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
3144 | uid = st.st_uid; | |
3145 | else | |
3146 | uid = getuid(); | |
3147 | ||
3148 | return lookup_uid(uid); | |
3149 | } | |
3150 | ||
3151 | char *getusername_malloc(void) { | |
3152 | const char *e; | |
3153 | ||
3154 | e = getenv("USER"); | |
3155 | if (e) | |
3156 | return strdup(e); | |
3157 | ||
3158 | return lookup_uid(getuid()); | |
3159 | } | |
3160 | ||
fc116c6a LP |
3161 | int getttyname_malloc(int fd, char **r) { |
3162 | char path[PATH_MAX], *c; | |
618e02c7 | 3163 | int k; |
8c6db833 LP |
3164 | |
3165 | assert(r); | |
ef2f1067 | 3166 | |
a05f97b3 LP |
3167 | k = ttyname_r(fd, path, sizeof(path)); |
3168 | if (k != 0) | |
618e02c7 | 3169 | return -k; |
ef2f1067 LP |
3170 | |
3171 | char_array_0(path); | |
3172 | ||
a05f97b3 LP |
3173 | c = strdup(startswith(path, "/dev/") ? path + 5 : path); |
3174 | if (!c) | |
8c6db833 LP |
3175 | return -ENOMEM; |
3176 | ||
3177 | *r = c; | |
3178 | return 0; | |
3179 | } | |
3180 | ||
fc116c6a LP |
3181 | int getttyname_harder(int fd, char **r) { |
3182 | int k; | |
3183 | char *s; | |
3184 | ||
a05f97b3 LP |
3185 | k = getttyname_malloc(fd, &s); |
3186 | if (k < 0) | |
fc116c6a LP |
3187 | return k; |
3188 | ||
3189 | if (streq(s, "tty")) { | |
3190 | free(s); | |
4d6d6518 | 3191 | return get_ctty(0, NULL, r); |
fc116c6a LP |
3192 | } |
3193 | ||
3194 | *r = s; | |
3195 | return 0; | |
3196 | } | |
3197 | ||
4d6d6518 | 3198 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
fc116c6a | 3199 | int k; |
4d6d6518 | 3200 | char line[LINE_MAX], *p, *fn; |
fc116c6a LP |
3201 | unsigned long ttynr; |
3202 | FILE *f; | |
3203 | ||
4d6d6518 LP |
3204 | if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0) |
3205 | return -ENOMEM; | |
3206 | ||
3207 | f = fopen(fn, "re"); | |
3208 | free(fn); | |
3209 | if (!f) | |
fc116c6a LP |
3210 | return -errno; |
3211 | ||
4d6d6518 | 3212 | if (!fgets(line, sizeof(line), f)) { |
35d50f55 | 3213 | k = feof(f) ? -EIO : -errno; |
fc116c6a LP |
3214 | fclose(f); |
3215 | return k; | |
3216 | } | |
3217 | ||
3218 | fclose(f); | |
3219 | ||
4d6d6518 LP |
3220 | p = strrchr(line, ')'); |
3221 | if (!p) | |
fc116c6a LP |
3222 | return -EIO; |
3223 | ||
3224 | p++; | |
3225 | ||
3226 | if (sscanf(p, " " | |
3227 | "%*c " /* state */ | |
3228 | "%*d " /* ppid */ | |
3229 | "%*d " /* pgrp */ | |
3230 | "%*d " /* session */ | |
3231 | "%lu ", /* ttynr */ | |
3232 | &ttynr) != 1) | |
3233 | return -EIO; | |
3234 | ||
3235 | *d = (dev_t) ttynr; | |
3236 | return 0; | |
3237 | } | |
3238 | ||
4d6d6518 | 3239 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
fc116c6a | 3240 | int k; |
20c03b7b | 3241 | char fn[PATH_MAX], *s, *b, *p; |
fc116c6a LP |
3242 | dev_t devnr; |
3243 | ||
3244 | assert(r); | |
3245 | ||
4d6d6518 LP |
3246 | k = get_ctty_devnr(pid, &devnr); |
3247 | if (k < 0) | |
fc116c6a LP |
3248 | return k; |
3249 | ||
3250 | snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr)); | |
3251 | char_array_0(fn); | |
3252 | ||
3253 | if ((k = readlink_malloc(fn, &s)) < 0) { | |
3254 | ||
3255 | if (k != -ENOENT) | |
3256 | return k; | |
3257 | ||
46824d0e LP |
3258 | /* This is an ugly hack */ |
3259 | if (major(devnr) == 136) { | |
3260 | if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0) | |
3261 | return -ENOMEM; | |
3262 | ||
3263 | *r = b; | |
3264 | if (_devnr) | |
3265 | *_devnr = devnr; | |
3266 | ||
3267 | return 0; | |
3268 | } | |
3269 | ||
fc116c6a LP |
3270 | /* Probably something like the ptys which have no |
3271 | * symlink in /dev/char. Let's return something | |
3272 | * vaguely useful. */ | |
3273 | ||
3274 | if (!(b = strdup(fn + 5))) | |
3275 | return -ENOMEM; | |
3276 | ||
3277 | *r = b; | |
46824d0e LP |
3278 | if (_devnr) |
3279 | *_devnr = devnr; | |
3280 | ||
fc116c6a LP |
3281 | return 0; |
3282 | } | |
3283 | ||
3284 | if (startswith(s, "/dev/")) | |
3285 | p = s + 5; | |
3286 | else if (startswith(s, "../")) | |
3287 | p = s + 3; | |
3288 | else | |
3289 | p = s; | |
3290 | ||
3291 | b = strdup(p); | |
3292 | free(s); | |
3293 | ||
3294 | if (!b) | |
3295 | return -ENOMEM; | |
3296 | ||
3297 | *r = b; | |
46824d0e LP |
3298 | if (_devnr) |
3299 | *_devnr = devnr; | |
3300 | ||
fc116c6a LP |
3301 | return 0; |
3302 | } | |
3303 | ||
f56d5db9 | 3304 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
8c6db833 LP |
3305 | DIR *d; |
3306 | int ret = 0; | |
3307 | ||
3308 | assert(fd >= 0); | |
3309 | ||
3310 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 3311 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 3312 | |
d4d046e3 LP |
3313 | d = fdopendir(fd); |
3314 | if (!d) { | |
8c6db833 | 3315 | close_nointr_nofail(fd); |
4c633005 LP |
3316 | |
3317 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
3318 | } |
3319 | ||
3320 | for (;;) { | |
7d5e9c0f LP |
3321 | struct dirent *de; |
3322 | union dirent_storage buf; | |
7925c22a LP |
3323 | bool is_dir, keep_around; |
3324 | struct stat st; | |
8c6db833 LP |
3325 | int r; |
3326 | ||
7d5e9c0f | 3327 | r = readdir_r(d, &buf.de, &de); |
d4d046e3 LP |
3328 | if (r != 0 && ret == 0) { |
3329 | ret = -r; | |
8c6db833 LP |
3330 | break; |
3331 | } | |
3332 | ||
3333 | if (!de) | |
3334 | break; | |
3335 | ||
3336 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
3337 | continue; | |
3338 | ||
7925c22a LP |
3339 | if (de->d_type == DT_UNKNOWN || |
3340 | honour_sticky || | |
3341 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 3342 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 3343 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3344 | ret = -errno; |
3345 | continue; | |
3346 | } | |
3347 | ||
3348 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
3349 | keep_around = |
3350 | honour_sticky && | |
3351 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
3352 | (st.st_mode & S_ISVTX); | |
ad293f5a | 3353 | } else { |
8c6db833 | 3354 | is_dir = de->d_type == DT_DIR; |
7925c22a | 3355 | keep_around = false; |
ad293f5a | 3356 | } |
8c6db833 LP |
3357 | |
3358 | if (is_dir) { | |
3359 | int subdir_fd; | |
8c6db833 | 3360 | |
597f43c7 | 3361 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
3362 | if (root_dev && st.st_dev != root_dev->st_dev) |
3363 | continue; | |
8c6db833 | 3364 | |
7925c22a LP |
3365 | subdir_fd = openat(fd, de->d_name, |
3366 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
3367 | if (subdir_fd < 0) { | |
3368 | if (ret == 0 && errno != ENOENT) | |
3369 | ret = -errno; | |
3370 | continue; | |
3371 | } | |
3372 | ||
b3d28469 | 3373 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
3374 | if (r < 0 && ret == 0) |
3375 | ret = r; | |
3376 | ||
3377 | if (!keep_around) | |
3378 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
3379 | if (ret == 0 && errno != ENOENT) |
3380 | ret = -errno; | |
3381 | } | |
3382 | ||
3383 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
3384 | |
3385 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3386 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3387 | ret = -errno; |
3388 | } | |
3389 | } | |
3390 | } | |
3391 | ||
3392 | closedir(d); | |
3393 | ||
3394 | return ret; | |
3395 | } | |
3396 | ||
f56d5db9 LP |
3397 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
3398 | struct statfs s; | |
3399 | ||
3400 | assert(fd >= 0); | |
3401 | ||
3402 | if (fstatfs(fd, &s) < 0) { | |
3403 | close_nointr_nofail(fd); | |
3404 | return -errno; | |
3405 | } | |
3406 | ||
3407 | /* We refuse to clean disk file systems with this call. This | |
3408 | * is extra paranoia just to be sure we never ever remove | |
3409 | * non-state data */ | |
3410 | ||
3411 | if (s.f_type != TMPFS_MAGIC && | |
3412 | s.f_type != RAMFS_MAGIC) { | |
3413 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3414 | close_nointr_nofail(fd); | |
3415 | return -EPERM; | |
3416 | } | |
3417 | ||
3418 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
3419 | } | |
3420 | ||
3421 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { | |
3422 | int fd, r; | |
3423 | struct statfs s; | |
8c6db833 LP |
3424 | |
3425 | assert(path); | |
3426 | ||
f56d5db9 LP |
3427 | /* We refuse to clean the root file system with this |
3428 | * call. This is extra paranoia to never cause a really | |
3429 | * seriously broken system. */ | |
3430 | if (path_equal(path, "/")) { | |
3431 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
3432 | return -EPERM; | |
3433 | } | |
461b1822 | 3434 | |
d4d046e3 LP |
3435 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
3436 | if (fd < 0) { | |
8c6db833 LP |
3437 | |
3438 | if (errno != ENOTDIR) | |
3439 | return -errno; | |
3440 | ||
f56d5db9 LP |
3441 | if (!dangerous) { |
3442 | if (statfs(path, &s) < 0) | |
3443 | return -errno; | |
3444 | ||
3445 | if (s.f_type != TMPFS_MAGIC && | |
3446 | s.f_type != RAMFS_MAGIC) { | |
3447 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3448 | return -EPERM; | |
3449 | } | |
3450 | } | |
3451 | ||
8c6db833 | 3452 | if (delete_root && !only_dirs) |
d4d046e3 | 3453 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
3454 | return -errno; |
3455 | ||
3456 | return 0; | |
3457 | } | |
3458 | ||
f56d5db9 LP |
3459 | if (!dangerous) { |
3460 | if (fstatfs(fd, &s) < 0) { | |
3461 | close_nointr_nofail(fd); | |
3462 | return -errno; | |
3463 | } | |
ad293f5a | 3464 | |
f56d5db9 LP |
3465 | if (s.f_type != TMPFS_MAGIC && |
3466 | s.f_type != RAMFS_MAGIC) { | |
3467 | log_error("Attempted to remove disk file system, and we can't allow that."); | |
3468 | close_nointr_nofail(fd); | |
3469 | return -EPERM; | |
3470 | } | |
3471 | } | |
3472 | ||
3473 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
3474 | if (delete_root) { |
3475 | ||
8d53b453 | 3476 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 3477 | return r; |
8c6db833 | 3478 | |
e27796a0 | 3479 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
3480 | if (r == 0) |
3481 | r = -errno; | |
3482 | } | |
ad293f5a | 3483 | } |
8c6db833 LP |
3484 | |
3485 | return r; | |
3486 | } | |
3487 | ||
f56d5db9 LP |
3488 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
3489 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
3490 | } | |
3491 | ||
3492 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
3493 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
3494 | } | |
3495 | ||
8c6db833 LP |
3496 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
3497 | assert(path); | |
3498 | ||
3499 | /* Under the assumption that we are running privileged we | |
3500 | * first change the access mode and only then hand out | |
3501 | * ownership to avoid a window where access is too open. */ | |
3502 | ||
8d53b453 LP |
3503 | if (mode != (mode_t) -1) |
3504 | if (chmod(path, mode) < 0) | |
3505 | return -errno; | |
8c6db833 | 3506 | |
8d53b453 LP |
3507 | if (uid != (uid_t) -1 || gid != (gid_t) -1) |
3508 | if (chown(path, uid, gid) < 0) | |
3509 | return -errno; | |
8c6db833 LP |
3510 | |
3511 | return 0; | |
ef2f1067 LP |
3512 | } |
3513 | ||
f4b47811 LP |
3514 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
3515 | assert(fd >= 0); | |
3516 | ||
3517 | /* Under the assumption that we are running privileged we | |
3518 | * first change the access mode and only then hand out | |
3519 | * ownership to avoid a window where access is too open. */ | |
3520 | ||
3521 | if (fchmod(fd, mode) < 0) | |
3522 | return -errno; | |
3523 | ||
3524 | if (fchown(fd, uid, gid) < 0) | |
3525 | return -errno; | |
3526 | ||
3527 | return 0; | |
3528 | } | |
3529 | ||
82c121a4 LP |
3530 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3531 | cpu_set_t *r; | |
3532 | unsigned n = 1024; | |
3533 | ||
3534 | /* Allocates the cpuset in the right size */ | |
3535 | ||
3536 | for (;;) { | |
3537 | if (!(r = CPU_ALLOC(n))) | |
3538 | return NULL; | |
3539 | ||
3540 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3541 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3542 | ||
3543 | if (ncpus) | |
3544 | *ncpus = n; | |
3545 | ||
3546 | return r; | |
3547 | } | |
3548 | ||
3549 | CPU_FREE(r); | |
3550 | ||
3551 | if (errno != EINVAL) | |
3552 | return NULL; | |
3553 | ||
3554 | n *= 2; | |
3555 | } | |
3556 | } | |
3557 | ||
669bec5d | 3558 | int status_vprintf(const char *status, bool ellipse, const char *format, va_list ap) { |
9ab7a8d2 | 3559 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
3560 | _cleanup_free_ char *s = NULL; |
3561 | _cleanup_close_ int fd = -1; | |
81beb750 LP |
3562 | struct iovec iovec[5]; |
3563 | int n = 0; | |
9e58ff9c LP |
3564 | |
3565 | assert(format); | |
3566 | ||
9ab7a8d2 | 3567 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
3568 | * optional and go exclusively to the console. */ |
3569 | ||
3570 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 3571 | return log_oom(); |
9e58ff9c | 3572 | |
67e5cc4f | 3573 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 3574 | if (fd < 0) |
669bec5d | 3575 | return fd; |
9e58ff9c | 3576 | |
67e5cc4f | 3577 | if (ellipse) { |
9ab7a8d2 MS |
3578 | char *e; |
3579 | size_t emax, sl; | |
3580 | int c; | |
3581 | ||
67e5cc4f LP |
3582 | c = fd_columns(fd); |
3583 | if (c <= 0) | |
3584 | c = 80; | |
81beb750 | 3585 | |
669bec5d | 3586 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
3587 | |
3588 | emax = c - sl - 1; | |
3589 | if (emax < 3) | |
3590 | emax = 3; | |
81beb750 | 3591 | |
67e5cc4f LP |
3592 | e = ellipsize(s, emax, 75); |
3593 | if (e) { | |
3594 | free(s); | |
3595 | s = e; | |
3596 | } | |
81beb750 LP |
3597 | } |
3598 | ||
3599 | zero(iovec); | |
81beb750 | 3600 | |
9ab7a8d2 MS |
3601 | if (status) { |
3602 | if (!isempty(status)) { | |
3603 | IOVEC_SET_STRING(iovec[n++], "["); | |
3604 | IOVEC_SET_STRING(iovec[n++], status); | |
3605 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3606 | } else | |
3607 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3608 | } |
3609 | ||
9ab7a8d2 MS |
3610 | IOVEC_SET_STRING(iovec[n++], s); |
3611 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 3612 | |
669bec5d LP |
3613 | if (writev(fd, iovec, n) < 0) |
3614 | return -errno; | |
9e58ff9c | 3615 | |
669bec5d | 3616 | return 0; |
9e58ff9c LP |
3617 | } |
3618 | ||
669bec5d | 3619 | int status_printf(const char *status, bool ellipse, const char *format, ...) { |
c846ff47 | 3620 | va_list ap; |
669bec5d | 3621 | int r; |
c846ff47 LP |
3622 | |
3623 | assert(format); | |
3624 | ||
3625 | va_start(ap, format); | |
669bec5d | 3626 | r = status_vprintf(status, ellipse, format, ap); |
c846ff47 | 3627 | va_end(ap); |
669bec5d LP |
3628 | |
3629 | return r; | |
c846ff47 LP |
3630 | } |
3631 | ||
669bec5d | 3632 | int status_welcome(void) { |
10aa7034 | 3633 | int r; |
669bec5d LP |
3634 | _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL; |
3635 | ||
3636 | r = parse_env_file("/etc/os-release", NEWLINE, | |
3637 | "PRETTY_NAME", &pretty_name, | |
3638 | "ANSI_COLOR", &ansi_color, | |
3639 | NULL); | |
3640 | if (r < 0 && r != -ENOENT) | |
3641 | log_warning("Failed to read /etc/os-release: %s", strerror(-r)); | |
3642 | ||
3643 | return status_printf(NULL, false, | |
3644 | "\nWelcome to \x1B[%sm%s\x1B[0m!\n", | |
3645 | isempty(ansi_color) ? "1" : ansi_color, | |
3646 | isempty(pretty_name) ? "Linux" : pretty_name); | |
c846ff47 LP |
3647 | } |
3648 | ||
fab56fc5 LP |
3649 | char *replace_env(const char *format, char **env) { |
3650 | enum { | |
3651 | WORD, | |
c24eb49e | 3652 | CURLY, |
fab56fc5 LP |
3653 | VARIABLE |
3654 | } state = WORD; | |
3655 | ||
3656 | const char *e, *word = format; | |
3657 | char *r = NULL, *k; | |
3658 | ||
3659 | assert(format); | |
3660 | ||
3661 | for (e = format; *e; e ++) { | |
3662 | ||
3663 | switch (state) { | |
3664 | ||
3665 | case WORD: | |
3666 | if (*e == '$') | |
c24eb49e | 3667 | state = CURLY; |
fab56fc5 LP |
3668 | break; |
3669 | ||
c24eb49e LP |
3670 | case CURLY: |
3671 | if (*e == '{') { | |
fab56fc5 LP |
3672 | if (!(k = strnappend(r, word, e-word-1))) |
3673 | goto fail; | |
3674 | ||
3675 | free(r); | |
3676 | r = k; | |
3677 | ||
3678 | word = e-1; | |
3679 | state = VARIABLE; | |
3680 | ||
3681 | } else if (*e == '$') { | |
3682 | if (!(k = strnappend(r, word, e-word))) | |
3683 | goto fail; | |
3684 | ||
3685 | free(r); | |
3686 | r = k; | |
3687 | ||
3688 | word = e+1; | |
3689 | state = WORD; | |
3690 | } else | |
3691 | state = WORD; | |
3692 | break; | |
3693 | ||
3694 | case VARIABLE: | |
c24eb49e | 3695 | if (*e == '}') { |
b95cf362 | 3696 | const char *t; |
fab56fc5 | 3697 | |
b95cf362 LP |
3698 | if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) |
3699 | t = ""; | |
fab56fc5 | 3700 | |
b95cf362 LP |
3701 | if (!(k = strappend(r, t))) |
3702 | goto fail; | |
fab56fc5 | 3703 | |
b95cf362 LP |
3704 | free(r); |
3705 | r = k; | |
fab56fc5 | 3706 | |
b95cf362 | 3707 | word = e+1; |
fab56fc5 LP |
3708 | state = WORD; |
3709 | } | |
3710 | break; | |
3711 | } | |
3712 | } | |
3713 | ||
3714 | if (!(k = strnappend(r, word, e-word))) | |
3715 | goto fail; | |
3716 | ||
3717 | free(r); | |
3718 | return k; | |
3719 | ||
3720 | fail: | |
3721 | free(r); | |
3722 | return NULL; | |
3723 | } | |
3724 | ||
3725 | char **replace_env_argv(char **argv, char **env) { | |
3726 | char **r, **i; | |
c24eb49e LP |
3727 | unsigned k = 0, l = 0; |
3728 | ||
3729 | l = strv_length(argv); | |
fab56fc5 | 3730 | |
c24eb49e | 3731 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
3732 | return NULL; |
3733 | ||
3734 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3735 | |
3736 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3737 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3738 | char *e; | |
3739 | char **w, **m; | |
3740 | unsigned q; | |
c24eb49e | 3741 | |
b95cf362 | 3742 | if ((e = strv_env_get(env, *i+1))) { |
c24eb49e LP |
3743 | |
3744 | if (!(m = strv_split_quoted(e))) { | |
3745 | r[k] = NULL; | |
3746 | strv_free(r); | |
3747 | return NULL; | |
3748 | } | |
b95cf362 LP |
3749 | } else |
3750 | m = NULL; | |
c24eb49e | 3751 | |
b95cf362 LP |
3752 | q = strv_length(m); |
3753 | l = l + q - 1; | |
c24eb49e | 3754 | |
b95cf362 LP |
3755 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
3756 | r[k] = NULL; | |
3757 | strv_free(r); | |
3758 | strv_free(m); | |
3759 | return NULL; | |
3760 | } | |
c24eb49e | 3761 | |
b95cf362 LP |
3762 | r = w; |
3763 | if (m) { | |
c24eb49e LP |
3764 | memcpy(r + k, m, q * sizeof(char*)); |
3765 | free(m); | |
c24eb49e | 3766 | } |
b95cf362 LP |
3767 | |
3768 | k += q; | |
3769 | continue; | |
c24eb49e LP |
3770 | } |
3771 | ||
3772 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
3773 | if (!(r[k++] = replace_env(*i, env))) { |
3774 | strv_free(r); | |
3775 | return NULL; | |
3776 | } | |
3777 | } | |
3778 | ||
3779 | r[k] = NULL; | |
3780 | return r; | |
3781 | } | |
3782 | ||
81beb750 LP |
3783 | int fd_columns(int fd) { |
3784 | struct winsize ws; | |
3785 | zero(ws); | |
3786 | ||
3787 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3788 | return -errno; | |
3789 | ||
3790 | if (ws.ws_col <= 0) | |
3791 | return -EIO; | |
3792 | ||
3793 | return ws.ws_col; | |
3794 | } | |
3795 | ||
28917d7d | 3796 | unsigned columns(void) { |
fa776d8e | 3797 | const char *e; |
28917d7d | 3798 | unsigned c; |
fa776d8e | 3799 | |
28917d7d LP |
3800 | if (_likely_(cached_columns > 0)) |
3801 | return cached_columns; | |
11f96fac | 3802 | |
28917d7d LP |
3803 | c = 0; |
3804 | e = getenv("COLUMNS"); | |
3805 | if (e) | |
3806 | safe_atou(e, &c); | |
fa776d8e | 3807 | |
28917d7d LP |
3808 | if (c <= 0) |
3809 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3810 | |
28917d7d LP |
3811 | if (c <= 0) |
3812 | c = 80; | |
11f96fac | 3813 | |
28917d7d LP |
3814 | cached_columns = c; |
3815 | return c; | |
11f96fac ZJS |
3816 | } |
3817 | ||
8f2d43a0 LP |
3818 | int fd_lines(int fd) { |
3819 | struct winsize ws; | |
3820 | zero(ws); | |
3821 | ||
3822 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3823 | return -errno; | |
3824 | ||
3825 | if (ws.ws_row <= 0) | |
3826 | return -EIO; | |
3827 | ||
3828 | return ws.ws_row; | |
3829 | } | |
3830 | ||
3831 | unsigned lines(void) { | |
8f2d43a0 | 3832 | const char *e; |
ed757c0c | 3833 | unsigned l; |
8f2d43a0 | 3834 | |
ed757c0c LP |
3835 | if (_likely_(cached_lines > 0)) |
3836 | return cached_lines; | |
8f2d43a0 | 3837 | |
ed757c0c | 3838 | l = 0; |
8f2d43a0 LP |
3839 | e = getenv("LINES"); |
3840 | if (e) | |
ed757c0c | 3841 | safe_atou(e, &l); |
8f2d43a0 | 3842 | |
ed757c0c LP |
3843 | if (l <= 0) |
3844 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3845 | |
ed757c0c LP |
3846 | if (l <= 0) |
3847 | l = 24; | |
8f2d43a0 | 3848 | |
ed757c0c LP |
3849 | cached_lines = l; |
3850 | return cached_lines; | |
3851 | } | |
3852 | ||
3853 | /* intended to be used as a SIGWINCH sighandler */ | |
3854 | void columns_lines_cache_reset(int signum) { | |
3855 | cached_columns = 0; | |
3856 | cached_lines = 0; | |
3857 | } | |
3858 | ||
3859 | bool on_tty(void) { | |
3860 | static int cached_on_tty = -1; | |
3861 | ||
3862 | if (_unlikely_(cached_on_tty < 0)) | |
3863 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3864 | ||
3865 | return cached_on_tty; | |
8f2d43a0 LP |
3866 | } |
3867 | ||
b4f10a5e LP |
3868 | int running_in_chroot(void) { |
3869 | struct stat a, b; | |
3870 | ||
3871 | zero(a); | |
3872 | zero(b); | |
3873 | ||
3874 | /* Only works as root */ | |
3875 | ||
3876 | if (stat("/proc/1/root", &a) < 0) | |
3877 | return -errno; | |
3878 | ||
3879 | if (stat("/", &b) < 0) | |
3880 | return -errno; | |
3881 | ||
3882 | return | |
3883 | a.st_dev != b.st_dev || | |
3884 | a.st_ino != b.st_ino; | |
3885 | } | |
3886 | ||
72f59706 LP |
3887 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3888 | size_t x; | |
8fe914ec LP |
3889 | char *r; |
3890 | ||
3891 | assert(s); | |
3892 | assert(percent <= 100); | |
72f59706 | 3893 | assert(new_length >= 3); |
8fe914ec | 3894 | |
72f59706 LP |
3895 | if (old_length <= 3 || old_length <= new_length) |
3896 | return strndup(s, old_length); | |
8fe914ec | 3897 | |
72f59706 LP |
3898 | r = new0(char, new_length+1); |
3899 | if (!r) | |
8fe914ec LP |
3900 | return r; |
3901 | ||
72f59706 | 3902 | x = (new_length * percent) / 100; |
8fe914ec | 3903 | |
72f59706 LP |
3904 | if (x > new_length - 3) |
3905 | x = new_length - 3; | |
8fe914ec LP |
3906 | |
3907 | memcpy(r, s, x); | |
3908 | r[x] = '.'; | |
3909 | r[x+1] = '.'; | |
3910 | r[x+2] = '.'; | |
3911 | memcpy(r + x + 3, | |
72f59706 LP |
3912 | s + old_length - (new_length - x - 3), |
3913 | new_length - x - 3); | |
8fe914ec LP |
3914 | |
3915 | return r; | |
3916 | } | |
3917 | ||
72f59706 LP |
3918 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3919 | return ellipsize_mem(s, strlen(s), length, percent); | |
3920 | } | |
3921 | ||
f6144808 LP |
3922 | int touch(const char *path) { |
3923 | int fd; | |
3924 | ||
3925 | assert(path); | |
3926 | ||
73836c5c LP |
3927 | /* This just opens the file for writing, ensuring it |
3928 | * exists. It doesn't call utimensat() the way /usr/bin/touch | |
3929 | * does it. */ | |
3930 | ||
3931 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644); | |
3932 | if (fd < 0) | |
f6144808 LP |
3933 | return -errno; |
3934 | ||
3935 | close_nointr_nofail(fd); | |
3936 | return 0; | |
3937 | } | |
afea26ad | 3938 | |
97c4a07d | 3939 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3940 | size_t l; |
3941 | assert(s); | |
3942 | ||
73836c5c LP |
3943 | /* This is rather stupid, simply removes the heading and |
3944 | * trailing quotes if there is one. Doesn't care about | |
57f30678 LP |
3945 | * escaping or anything. We should make this smarter one |
3946 | * day...*/ | |
73836c5c | 3947 | |
31ed59c5 LP |
3948 | l = strlen(s); |
3949 | if (l < 2) | |
11ce3427 LP |
3950 | return strdup(s); |
3951 | ||
97c4a07d | 3952 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3953 | return strndup(s+1, l-2); |
3954 | ||
3955 | return strdup(s); | |
3956 | } | |
3957 | ||
5f7c426e | 3958 | char *normalize_env_assignment(const char *s) { |
57f30678 LP |
3959 | _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL; |
3960 | char *eq, *r; | |
5f7c426e | 3961 | |
57f30678 LP |
3962 | eq = strchr(s, '='); |
3963 | if (!eq) { | |
3964 | char *t; | |
5f7c426e | 3965 | |
57f30678 LP |
3966 | r = strdup(s); |
3967 | if (!r) | |
5f7c426e LP |
3968 | return NULL; |
3969 | ||
57f30678 LP |
3970 | t = strstrip(r); |
3971 | if (t == r) | |
3972 | return r; | |
3973 | ||
3974 | memmove(r, t, strlen(t) + 1); | |
3975 | return r; | |
5f7c426e LP |
3976 | } |
3977 | ||
57f30678 LP |
3978 | name = strndup(s, eq - s); |
3979 | if (!name) | |
5f7c426e LP |
3980 | return NULL; |
3981 | ||
57f30678 LP |
3982 | p = strdup(eq + 1); |
3983 | if (!p) | |
5f7c426e | 3984 | return NULL; |
5f7c426e LP |
3985 | |
3986 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3987 | if (!value) |
5f7c426e | 3988 | return NULL; |
5f7c426e | 3989 | |
57f30678 | 3990 | if (asprintf(&r, "%s=%s", strstrip(name), value) < 0) |
5f7c426e LP |
3991 | r = NULL; |
3992 | ||
5f7c426e LP |
3993 | return r; |
3994 | } | |
3995 | ||
8e12a6ae | 3996 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3997 | siginfo_t dummy; |
3998 | ||
2e78aa99 | 3999 | assert(pid >= 1); |
1968a360 LP |
4000 | |
4001 | if (!status) | |
4002 | status = &dummy; | |
2e78aa99 LP |
4003 | |
4004 | for (;;) { | |
8e12a6ae LP |
4005 | zero(*status); |
4006 | ||
4007 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
4008 | |
4009 | if (errno == EINTR) | |
4010 | continue; | |
4011 | ||
4012 | return -errno; | |
4013 | } | |
4014 | ||
4015 | return 0; | |
4016 | } | |
4017 | } | |
4018 | ||
97c4a07d LP |
4019 | int wait_for_terminate_and_warn(const char *name, pid_t pid) { |
4020 | int r; | |
4021 | siginfo_t status; | |
4022 | ||
4023 | assert(name); | |
4024 | assert(pid > 1); | |
4025 | ||
d87be9b0 LP |
4026 | r = wait_for_terminate(pid, &status); |
4027 | if (r < 0) { | |
97c4a07d LP |
4028 | log_warning("Failed to wait for %s: %s", name, strerror(-r)); |
4029 | return r; | |
4030 | } | |
4031 | ||
4032 | if (status.si_code == CLD_EXITED) { | |
4033 | if (status.si_status != 0) { | |
4034 | log_warning("%s failed with error code %i.", name, status.si_status); | |
0a27cf3f | 4035 | return status.si_status; |
97c4a07d LP |
4036 | } |
4037 | ||
4038 | log_debug("%s succeeded.", name); | |
4039 | return 0; | |
4040 | ||
4041 | } else if (status.si_code == CLD_KILLED || | |
4042 | status.si_code == CLD_DUMPED) { | |
4043 | ||
4044 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
4045 | return -EPROTO; | |
4046 | } | |
4047 | ||
4048 | log_warning("%s failed due to unknown reason.", name); | |
4049 | return -EPROTO; | |
97c4a07d LP |
4050 | } |
4051 | ||
6a39419f | 4052 | _noreturn_ void freeze(void) { |
720ce21d LP |
4053 | |
4054 | /* Make sure nobody waits for us on a socket anymore */ | |
4055 | close_all_fds(NULL, 0); | |
4056 | ||
c29597a1 LP |
4057 | sync(); |
4058 | ||
3c14d26c LP |
4059 | for (;;) |
4060 | pause(); | |
4061 | } | |
4062 | ||
00dc5d76 LP |
4063 | bool null_or_empty(struct stat *st) { |
4064 | assert(st); | |
4065 | ||
4066 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
4067 | return true; | |
4068 | ||
c8f26f42 | 4069 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
4070 | return true; |
4071 | ||
4072 | return false; | |
4073 | } | |
4074 | ||
83096483 LP |
4075 | int null_or_empty_path(const char *fn) { |
4076 | struct stat st; | |
4077 | ||
4078 | assert(fn); | |
4079 | ||
4080 | if (stat(fn, &st) < 0) | |
4081 | return -errno; | |
4082 | ||
4083 | return null_or_empty(&st); | |
4084 | } | |
4085 | ||
a247755d | 4086 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
4087 | int nfd; |
4088 | DIR *d; | |
4089 | ||
73836c5c LP |
4090 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags); |
4091 | if (nfd < 0) | |
c4731d11 LP |
4092 | return NULL; |
4093 | ||
73836c5c LP |
4094 | d = fdopendir(nfd); |
4095 | if (!d) { | |
c4731d11 LP |
4096 | close_nointr_nofail(nfd); |
4097 | return NULL; | |
4098 | } | |
4099 | ||
4100 | return d; | |
3b63d2d3 LP |
4101 | } |
4102 | ||
8a0867d6 LP |
4103 | int signal_from_string_try_harder(const char *s) { |
4104 | int signo; | |
4105 | assert(s); | |
4106 | ||
73836c5c LP |
4107 | signo = signal_from_string(s); |
4108 | if (signo <= 0) | |
8a0867d6 LP |
4109 | if (startswith(s, "SIG")) |
4110 | return signal_from_string(s+3); | |
4111 | ||
4112 | return signo; | |
4113 | } | |
4114 | ||
10717a1a LP |
4115 | void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { |
4116 | ||
4117 | assert(f); | |
4118 | assert(name); | |
4119 | assert(t); | |
4120 | ||
4121 | if (!dual_timestamp_is_set(t)) | |
4122 | return; | |
4123 | ||
4124 | fprintf(f, "%s=%llu %llu\n", | |
4125 | name, | |
4126 | (unsigned long long) t->realtime, | |
4127 | (unsigned long long) t->monotonic); | |
4128 | } | |
4129 | ||
799fd0fd | 4130 | void dual_timestamp_deserialize(const char *value, dual_timestamp *t) { |
10717a1a LP |
4131 | unsigned long long a, b; |
4132 | ||
10717a1a LP |
4133 | assert(value); |
4134 | assert(t); | |
4135 | ||
4136 | if (sscanf(value, "%lli %llu", &a, &b) != 2) | |
4137 | log_debug("Failed to parse finish timestamp value %s", value); | |
4138 | else { | |
4139 | t->realtime = a; | |
4140 | t->monotonic = b; | |
4141 | } | |
4142 | } | |
4143 | ||
383182b5 | 4144 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
e23a0ce8 LP |
4145 | char *dn, *t, *u; |
4146 | int r; | |
4147 | ||
4148 | /* FIXME: to follow udev's logic 100% we need to leave valid | |
4149 | * UTF8 chars unescaped */ | |
4150 | ||
383182b5 DR |
4151 | u = unquote(tagvalue, "\"\'"); |
4152 | if (u == NULL) | |
4153 | return NULL; | |
e23a0ce8 | 4154 | |
383182b5 DR |
4155 | t = xescape(u, "/ "); |
4156 | free(u); | |
e23a0ce8 | 4157 | |
383182b5 DR |
4158 | if (t == NULL) |
4159 | return NULL; | |
e23a0ce8 | 4160 | |
383182b5 DR |
4161 | r = asprintf(&dn, "/dev/disk/by-%s/%s", by, t); |
4162 | free(t); | |
e23a0ce8 | 4163 | |
383182b5 DR |
4164 | if (r < 0) |
4165 | return NULL; | |
e23a0ce8 | 4166 | |
383182b5 DR |
4167 | return dn; |
4168 | } | |
e23a0ce8 | 4169 | |
383182b5 | 4170 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
4171 | assert(p); |
4172 | ||
383182b5 DR |
4173 | if (startswith(p, "LABEL=")) |
4174 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 4175 | |
383182b5 DR |
4176 | if (startswith(p, "UUID=")) |
4177 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 4178 | |
84cc2abf DR |
4179 | if (startswith(p, "PARTUUID=")) |
4180 | return tag_to_udev_node(p+9, "partuuid"); | |
4181 | ||
4182 | if (startswith(p, "PARTLABEL=")) | |
4183 | return tag_to_udev_node(p+10, "partlabel"); | |
4184 | ||
e23a0ce8 LP |
4185 | return strdup(p); |
4186 | } | |
4187 | ||
f212ac12 LP |
4188 | bool tty_is_vc(const char *tty) { |
4189 | assert(tty); | |
4190 | ||
4191 | if (startswith(tty, "/dev/")) | |
4192 | tty += 5; | |
4193 | ||
98a28fef LP |
4194 | return vtnr_from_tty(tty) >= 0; |
4195 | } | |
4196 | ||
d1122ad5 LP |
4197 | bool tty_is_console(const char *tty) { |
4198 | assert(tty); | |
4199 | ||
4200 | if (startswith(tty, "/dev/")) | |
4201 | tty += 5; | |
4202 | ||
4203 | return streq(tty, "console"); | |
4204 | } | |
4205 | ||
98a28fef LP |
4206 | int vtnr_from_tty(const char *tty) { |
4207 | int i, r; | |
4208 | ||
4209 | assert(tty); | |
4210 | ||
4211 | if (startswith(tty, "/dev/")) | |
4212 | tty += 5; | |
4213 | ||
4214 | if (!startswith(tty, "tty") ) | |
4215 | return -EINVAL; | |
4216 | ||
4217 | if (tty[3] < '0' || tty[3] > '9') | |
4218 | return -EINVAL; | |
4219 | ||
4220 | r = safe_atoi(tty+3, &i); | |
4221 | if (r < 0) | |
4222 | return r; | |
4223 | ||
4224 | if (i < 0 || i > 63) | |
4225 | return -EINVAL; | |
4226 | ||
4227 | return i; | |
f212ac12 LP |
4228 | } |
4229 | ||
3043935f | 4230 | bool tty_is_vc_resolve(const char *tty) { |
3030ccd7 | 4231 | char *active = NULL; |
3043935f | 4232 | bool b; |
3030ccd7 | 4233 | |
e3aa71c3 LP |
4234 | assert(tty); |
4235 | ||
4236 | if (startswith(tty, "/dev/")) | |
4237 | tty += 5; | |
4238 | ||
3d9a4122 LP |
4239 | /* Resolve where /dev/console is pointing to, if /sys is |
4240 | * actually ours (i.e. not read-only-mounted which is a sign | |
4241 | * for container setups) */ | |
4242 | if (streq(tty, "console") && path_is_read_only_fs("/sys") <= 0) | |
3030ccd7 | 4243 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { |
079a09fb LP |
4244 | /* If multiple log outputs are configured the |
4245 | * last one is what /dev/console points to */ | |
3043935f LP |
4246 | tty = strrchr(active, ' '); |
4247 | if (tty) | |
079a09fb LP |
4248 | tty++; |
4249 | else | |
4250 | tty = active; | |
3030ccd7 LP |
4251 | } |
4252 | ||
3043935f | 4253 | b = tty_is_vc(tty); |
3030ccd7 | 4254 | free(active); |
e3aa71c3 | 4255 | |
3043935f LP |
4256 | return b; |
4257 | } | |
4258 | ||
4259 | const char *default_term_for_tty(const char *tty) { | |
4260 | assert(tty); | |
4261 | ||
acda6a05 | 4262 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102"; |
e3aa71c3 LP |
4263 | } |
4264 | ||
87d2c1ff | 4265 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
4266 | assert(de); |
4267 | ||
4268 | if (ignore_file(de->d_name)) | |
4269 | return false; | |
4270 | ||
4271 | if (de->d_type != DT_REG && | |
4272 | de->d_type != DT_LNK && | |
4273 | de->d_type != DT_UNKNOWN) | |
4274 | return false; | |
4275 | ||
4276 | return true; | |
4277 | } | |
4278 | ||
87d2c1ff LP |
4279 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
4280 | assert(de); | |
4281 | ||
a228a22f LP |
4282 | if (de->d_type != DT_REG && |
4283 | de->d_type != DT_LNK && | |
4284 | de->d_type != DT_UNKNOWN) | |
4285 | return false; | |
4286 | ||
4287 | if (ignore_file_allow_backup(de->d_name)) | |
87d2c1ff LP |
4288 | return false; |
4289 | ||
4290 | return endswith(de->d_name, suffix); | |
4291 | } | |
4292 | ||
83cc030f LP |
4293 | void execute_directory(const char *directory, DIR *d, char *argv[]) { |
4294 | DIR *_d = NULL; | |
4295 | struct dirent *de; | |
4296 | Hashmap *pids = NULL; | |
4297 | ||
4298 | assert(directory); | |
4299 | ||
4300 | /* Executes all binaries in a directory in parallel and waits | |
4301 | * until all they all finished. */ | |
4302 | ||
4303 | if (!d) { | |
4304 | if (!(_d = opendir(directory))) { | |
4305 | ||
4306 | if (errno == ENOENT) | |
4307 | return; | |
4308 | ||
4309 | log_error("Failed to enumerate directory %s: %m", directory); | |
4310 | return; | |
4311 | } | |
4312 | ||
4313 | d = _d; | |
4314 | } | |
4315 | ||
4316 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
4317 | log_error("Failed to allocate set."); | |
4318 | goto finish; | |
4319 | } | |
4320 | ||
4321 | while ((de = readdir(d))) { | |
4322 | char *path; | |
4323 | pid_t pid; | |
4324 | int k; | |
4325 | ||
fb19a739 | 4326 | if (!dirent_is_file(de)) |
83cc030f LP |
4327 | continue; |
4328 | ||
4329 | if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) { | |
0d0f0c50 | 4330 | log_oom(); |
83cc030f LP |
4331 | continue; |
4332 | } | |
4333 | ||
4334 | if ((pid = fork()) < 0) { | |
4335 | log_error("Failed to fork: %m"); | |
4336 | free(path); | |
4337 | continue; | |
4338 | } | |
4339 | ||
4340 | if (pid == 0) { | |
4341 | char *_argv[2]; | |
4342 | /* Child */ | |
4343 | ||
4344 | if (!argv) { | |
4345 | _argv[0] = path; | |
4346 | _argv[1] = NULL; | |
4347 | argv = _argv; | |
4348 | } else | |
6edd7d0a | 4349 | argv[0] = path; |
83cc030f LP |
4350 | |
4351 | execv(path, argv); | |
4352 | ||
4353 | log_error("Failed to execute %s: %m", path); | |
4354 | _exit(EXIT_FAILURE); | |
4355 | } | |
4356 | ||
4357 | log_debug("Spawned %s as %lu", path, (unsigned long) pid); | |
4358 | ||
4359 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) { | |
4360 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
4361 | free(path); | |
4362 | } | |
4363 | } | |
4364 | ||
4365 | while (!hashmap_isempty(pids)) { | |
ec3f9b53 | 4366 | pid_t pid = PTR_TO_UINT(hashmap_first_key(pids)); |
83cc030f LP |
4367 | siginfo_t si; |
4368 | char *path; | |
4369 | ||
4370 | zero(si); | |
ec3f9b53 | 4371 | if (waitid(P_PID, pid, &si, WEXITED) < 0) { |
83cc030f LP |
4372 | |
4373 | if (errno == EINTR) | |
4374 | continue; | |
4375 | ||
4376 | log_error("waitid() failed: %m"); | |
4377 | goto finish; | |
4378 | } | |
4379 | ||
4380 | if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
96342de6 | 4381 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
83cc030f LP |
4382 | if (si.si_code == CLD_EXITED) |
4383 | log_error("%s exited with exit status %i.", path, si.si_status); | |
4384 | else | |
4385 | log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status)); | |
4386 | } else | |
4387 | log_debug("%s exited successfully.", path); | |
4388 | ||
4389 | free(path); | |
4390 | } | |
4391 | } | |
4392 | ||
4393 | finish: | |
4394 | if (_d) | |
4395 | closedir(_d); | |
4396 | ||
4397 | if (pids) | |
4398 | hashmap_free_free(pids); | |
4399 | } | |
4400 | ||
430c18ed LP |
4401 | int kill_and_sigcont(pid_t pid, int sig) { |
4402 | int r; | |
4403 | ||
4404 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4405 | ||
4406 | if (r >= 0) | |
4407 | kill(pid, SIGCONT); | |
4408 | ||
4409 | return r; | |
4410 | } | |
4411 | ||
05feefe0 LP |
4412 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4413 | const char *i; | |
4414 | ||
4415 | if (!nulstr) | |
4416 | return false; | |
4417 | ||
4418 | NULSTR_FOREACH(i, nulstr) | |
4419 | if (streq(i, needle)) | |
4420 | return true; | |
4421 | ||
4422 | return false; | |
4423 | } | |
4424 | ||
6faa1114 | 4425 | bool plymouth_running(void) { |
9408a2d2 | 4426 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4427 | } |
4428 | ||
9beb3f4d LP |
4429 | char* strshorten(char *s, size_t l) { |
4430 | assert(s); | |
4431 | ||
4432 | if (l < strlen(s)) | |
4433 | s[l] = 0; | |
4434 | ||
4435 | return s; | |
4436 | } | |
4437 | ||
4438 | static bool hostname_valid_char(char c) { | |
4439 | return | |
4440 | (c >= 'a' && c <= 'z') || | |
4441 | (c >= 'A' && c <= 'Z') || | |
4442 | (c >= '0' && c <= '9') || | |
4443 | c == '-' || | |
4444 | c == '_' || | |
4445 | c == '.'; | |
4446 | } | |
4447 | ||
4448 | bool hostname_is_valid(const char *s) { | |
4449 | const char *p; | |
4450 | ||
4451 | if (isempty(s)) | |
4452 | return false; | |
4453 | ||
4454 | for (p = s; *p; p++) | |
4455 | if (!hostname_valid_char(*p)) | |
4456 | return false; | |
4457 | ||
4458 | if (p-s > HOST_NAME_MAX) | |
4459 | return false; | |
4460 | ||
4461 | return true; | |
4462 | } | |
4463 | ||
4464 | char* hostname_cleanup(char *s) { | |
4465 | char *p, *d; | |
4466 | ||
4467 | for (p = s, d = s; *p; p++) | |
4468 | if ((*p >= 'a' && *p <= 'z') || | |
4469 | (*p >= 'A' && *p <= 'Z') || | |
4470 | (*p >= '0' && *p <= '9') || | |
4471 | *p == '-' || | |
4472 | *p == '_' || | |
4473 | *p == '.') | |
4474 | *(d++) = *p; | |
4475 | ||
4476 | *d = 0; | |
4477 | ||
4478 | strshorten(s, HOST_NAME_MAX); | |
4479 | return s; | |
4480 | } | |
4481 | ||
1325aa42 LP |
4482 | int pipe_eof(int fd) { |
4483 | struct pollfd pollfd; | |
4484 | int r; | |
4485 | ||
4486 | zero(pollfd); | |
4487 | pollfd.fd = fd; | |
4488 | pollfd.events = POLLIN|POLLHUP; | |
4489 | ||
4490 | r = poll(&pollfd, 1, 0); | |
4491 | if (r < 0) | |
4492 | return -errno; | |
4493 | ||
4494 | if (r == 0) | |
4495 | return 0; | |
4496 | ||
4497 | return pollfd.revents & POLLHUP; | |
4498 | } | |
4499 | ||
8f2d43a0 | 4500 | int fd_wait_for_event(int fd, int event, usec_t t) { |
df50185b LP |
4501 | struct pollfd pollfd; |
4502 | int r; | |
4503 | ||
4504 | zero(pollfd); | |
4505 | pollfd.fd = fd; | |
4506 | pollfd.events = event; | |
4507 | ||
8f2d43a0 | 4508 | r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC)); |
df50185b LP |
4509 | if (r < 0) |
4510 | return -errno; | |
4511 | ||
4512 | if (r == 0) | |
4513 | return 0; | |
4514 | ||
4515 | return pollfd.revents; | |
4516 | } | |
4517 | ||
5a3ab509 LP |
4518 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4519 | FILE *f; | |
4520 | char *t; | |
4521 | const char *fn; | |
4522 | size_t k; | |
4523 | int fd; | |
4524 | ||
4525 | assert(path); | |
4526 | assert(_f); | |
4527 | assert(_temp_path); | |
4528 | ||
4529 | t = new(char, strlen(path) + 1 + 6 + 1); | |
4530 | if (!t) | |
4531 | return -ENOMEM; | |
4532 | ||
9eb977db | 4533 | fn = path_get_file_name(path); |
5a3ab509 LP |
4534 | k = fn-path; |
4535 | memcpy(t, path, k); | |
4536 | t[k] = '.'; | |
4537 | stpcpy(stpcpy(t+k+1, fn), "XXXXXX"); | |
4538 | ||
4539 | fd = mkostemp(t, O_WRONLY|O_CLOEXEC); | |
4540 | if (fd < 0) { | |
4541 | free(t); | |
4542 | return -errno; | |
4543 | } | |
4544 | ||
4545 | f = fdopen(fd, "we"); | |
4546 | if (!f) { | |
4547 | unlink(t); | |
4548 | free(t); | |
4549 | return -errno; | |
4550 | } | |
4551 | ||
4552 | *_f = f; | |
4553 | *_temp_path = t; | |
4554 | ||
4555 | return 0; | |
4556 | } | |
4557 | ||
6ea832a2 | 4558 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4559 | assert(fd >= 0); |
4560 | ||
6ea832a2 LP |
4561 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4562 | return -errno; | |
4563 | ||
4564 | return 0; | |
4565 | } | |
4566 | ||
4567 | int terminal_vhangup(const char *name) { | |
4568 | int fd, r; | |
4569 | ||
4570 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4571 | if (fd < 0) | |
4572 | return fd; | |
4573 | ||
4574 | r = terminal_vhangup_fd(fd); | |
4575 | close_nointr_nofail(fd); | |
4576 | ||
4577 | return r; | |
4578 | } | |
4579 | ||
4580 | int vt_disallocate(const char *name) { | |
4581 | int fd, r; | |
4582 | unsigned u; | |
6ea832a2 LP |
4583 | |
4584 | /* Deallocate the VT if possible. If not possible | |
4585 | * (i.e. because it is the active one), at least clear it | |
4586 | * entirely (including the scrollback buffer) */ | |
4587 | ||
b83bc4e9 LP |
4588 | if (!startswith(name, "/dev/")) |
4589 | return -EINVAL; | |
4590 | ||
4591 | if (!tty_is_vc(name)) { | |
4592 | /* So this is not a VT. I guess we cannot deallocate | |
4593 | * it then. But let's at least clear the screen */ | |
4594 | ||
4595 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4596 | if (fd < 0) | |
4597 | return fd; | |
4598 | ||
8585357a LP |
4599 | loop_write(fd, |
4600 | "\033[r" /* clear scrolling region */ | |
4601 | "\033[H" /* move home */ | |
4602 | "\033[2J", /* clear screen */ | |
4603 | 10, false); | |
b83bc4e9 LP |
4604 | close_nointr_nofail(fd); |
4605 | ||
4606 | return 0; | |
4607 | } | |
6ea832a2 LP |
4608 | |
4609 | if (!startswith(name, "/dev/tty")) | |
4610 | return -EINVAL; | |
4611 | ||
4612 | r = safe_atou(name+8, &u); | |
4613 | if (r < 0) | |
4614 | return r; | |
4615 | ||
4616 | if (u <= 0) | |
b83bc4e9 | 4617 | return -EINVAL; |
6ea832a2 | 4618 | |
b83bc4e9 | 4619 | /* Try to deallocate */ |
6ea832a2 LP |
4620 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4621 | if (fd < 0) | |
4622 | return fd; | |
4623 | ||
4624 | r = ioctl(fd, VT_DISALLOCATE, u); | |
b83bc4e9 | 4625 | close_nointr_nofail(fd); |
6ea832a2 | 4626 | |
b83bc4e9 LP |
4627 | if (r >= 0) |
4628 | return 0; | |
6ea832a2 | 4629 | |
b83bc4e9 | 4630 | if (errno != EBUSY) |
6ea832a2 | 4631 | return -errno; |
6ea832a2 | 4632 | |
b83bc4e9 LP |
4633 | /* Couldn't deallocate, so let's clear it fully with |
4634 | * scrollback */ | |
4635 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4636 | if (fd < 0) |
b83bc4e9 | 4637 | return fd; |
6ea832a2 | 4638 | |
8585357a LP |
4639 | loop_write(fd, |
4640 | "\033[r" /* clear scrolling region */ | |
4641 | "\033[H" /* move home */ | |
4642 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4643 | 10, false); | |
b83bc4e9 | 4644 | close_nointr_nofail(fd); |
6ea832a2 | 4645 | |
b83bc4e9 | 4646 | return 0; |
6ea832a2 LP |
4647 | } |
4648 | ||
34ca941c LP |
4649 | int copy_file(const char *from, const char *to) { |
4650 | int r, fdf, fdt; | |
4651 | ||
4652 | assert(from); | |
4653 | assert(to); | |
4654 | ||
4655 | fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4656 | if (fdf < 0) | |
4657 | return -errno; | |
4658 | ||
4659 | fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644); | |
4660 | if (fdt < 0) { | |
4661 | close_nointr_nofail(fdf); | |
4662 | return -errno; | |
4663 | } | |
4664 | ||
4665 | for (;;) { | |
4666 | char buf[PIPE_BUF]; | |
4667 | ssize_t n, k; | |
4668 | ||
4669 | n = read(fdf, buf, sizeof(buf)); | |
4670 | if (n < 0) { | |
4671 | r = -errno; | |
4672 | ||
4673 | close_nointr_nofail(fdf); | |
4674 | close_nointr(fdt); | |
4675 | unlink(to); | |
4676 | ||
4677 | return r; | |
4678 | } | |
4679 | ||
4680 | if (n == 0) | |
4681 | break; | |
4682 | ||
4683 | errno = 0; | |
4684 | k = loop_write(fdt, buf, n, false); | |
4685 | if (n != k) { | |
4686 | r = k < 0 ? k : (errno ? -errno : -EIO); | |
4687 | ||
4688 | close_nointr_nofail(fdf); | |
4689 | close_nointr(fdt); | |
4690 | ||
4691 | unlink(to); | |
4692 | return r; | |
4693 | } | |
4694 | } | |
4695 | ||
4696 | close_nointr_nofail(fdf); | |
4697 | r = close_nointr(fdt); | |
4698 | ||
4699 | if (r < 0) { | |
4700 | unlink(to); | |
4701 | return r; | |
4702 | } | |
4703 | ||
4704 | return 0; | |
4705 | } | |
4706 | ||
424a19f8 LP |
4707 | int symlink_atomic(const char *from, const char *to) { |
4708 | char *x; | |
4709 | _cleanup_free_ char *t; | |
34ca941c LP |
4710 | const char *fn; |
4711 | size_t k; | |
4712 | unsigned long long ull; | |
4713 | unsigned i; | |
4714 | int r; | |
4715 | ||
4716 | assert(from); | |
4717 | assert(to); | |
4718 | ||
4719 | t = new(char, strlen(to) + 1 + 16 + 1); | |
4720 | if (!t) | |
4721 | return -ENOMEM; | |
4722 | ||
9eb977db | 4723 | fn = path_get_file_name(to); |
34ca941c LP |
4724 | k = fn-to; |
4725 | memcpy(t, to, k); | |
4726 | t[k] = '.'; | |
4727 | x = stpcpy(t+k+1, fn); | |
4728 | ||
4729 | ull = random_ull(); | |
4730 | for (i = 0; i < 16; i++) { | |
4731 | *(x++) = hexchar(ull & 0xF); | |
4732 | ull >>= 4; | |
4733 | } | |
4734 | ||
4735 | *x = 0; | |
4736 | ||
424a19f8 LP |
4737 | if (symlink(from, t) < 0) |
4738 | return -errno; | |
34ca941c LP |
4739 | |
4740 | if (rename(t, to) < 0) { | |
4741 | r = -errno; | |
4742 | unlink(t); | |
34ca941c LP |
4743 | return r; |
4744 | } | |
4745 | ||
424a19f8 | 4746 | return 0; |
34ca941c LP |
4747 | } |
4748 | ||
4d6d6518 LP |
4749 | bool display_is_local(const char *display) { |
4750 | assert(display); | |
4751 | ||
4752 | return | |
4753 | display[0] == ':' && | |
4754 | display[1] >= '0' && | |
4755 | display[1] <= '9'; | |
4756 | } | |
4757 | ||
4758 | int socket_from_display(const char *display, char **path) { | |
4759 | size_t k; | |
4760 | char *f, *c; | |
4761 | ||
4762 | assert(display); | |
4763 | assert(path); | |
4764 | ||
4765 | if (!display_is_local(display)) | |
4766 | return -EINVAL; | |
4767 | ||
4768 | k = strspn(display+1, "0123456789"); | |
4769 | ||
4770 | f = new(char, sizeof("/tmp/.X11-unix/X") + k); | |
4771 | if (!f) | |
4772 | return -ENOMEM; | |
4773 | ||
4774 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4775 | memcpy(c, display+1, k); | |
4776 | c[k] = 0; | |
4777 | ||
4778 | *path = f; | |
4779 | ||
4780 | return 0; | |
4781 | } | |
4782 | ||
d05c5031 LP |
4783 | int get_user_creds( |
4784 | const char **username, | |
4785 | uid_t *uid, gid_t *gid, | |
4786 | const char **home, | |
4787 | const char **shell) { | |
4788 | ||
1cccf435 | 4789 | struct passwd *p; |
ddd88763 | 4790 | uid_t u; |
1cccf435 MV |
4791 | |
4792 | assert(username); | |
4793 | assert(*username); | |
1cccf435 MV |
4794 | |
4795 | /* We enforce some special rules for uid=0: in order to avoid | |
4796 | * NSS lookups for root we hardcode its data. */ | |
4797 | ||
4798 | if (streq(*username, "root") || streq(*username, "0")) { | |
4799 | *username = "root"; | |
4b67834e LP |
4800 | |
4801 | if (uid) | |
4802 | *uid = 0; | |
4803 | ||
4804 | if (gid) | |
4805 | *gid = 0; | |
4806 | ||
4807 | if (home) | |
4808 | *home = "/root"; | |
d05c5031 LP |
4809 | |
4810 | if (shell) | |
4811 | *shell = "/bin/sh"; | |
4812 | ||
1cccf435 MV |
4813 | return 0; |
4814 | } | |
4815 | ||
ddd88763 | 4816 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4817 | errno = 0; |
ddd88763 | 4818 | p = getpwuid(u); |
1cccf435 MV |
4819 | |
4820 | /* If there are multiple users with the same id, make | |
4821 | * sure to leave $USER to the configured value instead | |
4822 | * of the first occurrence in the database. However if | |
4823 | * the uid was configured by a numeric uid, then let's | |
4824 | * pick the real username from /etc/passwd. */ | |
4825 | if (p) | |
4826 | *username = p->pw_name; | |
4827 | } else { | |
4828 | errno = 0; | |
4829 | p = getpwnam(*username); | |
4830 | } | |
4831 | ||
4832 | if (!p) | |
4833 | return errno != 0 ? -errno : -ESRCH; | |
4834 | ||
4b67834e LP |
4835 | if (uid) |
4836 | *uid = p->pw_uid; | |
4837 | ||
4838 | if (gid) | |
4839 | *gid = p->pw_gid; | |
4840 | ||
4841 | if (home) | |
4842 | *home = p->pw_dir; | |
4843 | ||
d05c5031 LP |
4844 | if (shell) |
4845 | *shell = p->pw_shell; | |
4846 | ||
4b67834e LP |
4847 | return 0; |
4848 | } | |
4849 | ||
4850 | int get_group_creds(const char **groupname, gid_t *gid) { | |
4851 | struct group *g; | |
4852 | gid_t id; | |
4853 | ||
4854 | assert(groupname); | |
4855 | ||
4856 | /* We enforce some special rules for gid=0: in order to avoid | |
4857 | * NSS lookups for root we hardcode its data. */ | |
4858 | ||
4859 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4860 | *groupname = "root"; | |
4861 | ||
4862 | if (gid) | |
4863 | *gid = 0; | |
4864 | ||
4865 | return 0; | |
4866 | } | |
4867 | ||
4868 | if (parse_gid(*groupname, &id) >= 0) { | |
4869 | errno = 0; | |
4870 | g = getgrgid(id); | |
4871 | ||
4872 | if (g) | |
4873 | *groupname = g->gr_name; | |
4874 | } else { | |
4875 | errno = 0; | |
4876 | g = getgrnam(*groupname); | |
4877 | } | |
4878 | ||
4879 | if (!g) | |
4880 | return errno != 0 ? -errno : -ESRCH; | |
4881 | ||
4882 | if (gid) | |
4883 | *gid = g->gr_gid; | |
4884 | ||
1cccf435 MV |
4885 | return 0; |
4886 | } | |
4887 | ||
43673799 LP |
4888 | int in_group(const char *name) { |
4889 | gid_t gid, *gids; | |
4890 | int ngroups_max, r, i; | |
4891 | ||
4892 | r = get_group_creds(&name, &gid); | |
4893 | if (r < 0) | |
4894 | return r; | |
4895 | ||
4896 | if (getgid() == gid) | |
4897 | return 1; | |
4898 | ||
4899 | if (getegid() == gid) | |
4900 | return 1; | |
4901 | ||
4902 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4903 | assert(ngroups_max > 0); | |
4904 | ||
4905 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4906 | ||
4907 | r = getgroups(ngroups_max, gids); | |
4908 | if (r < 0) | |
4909 | return -errno; | |
4910 | ||
4911 | for (i = 0; i < r; i++) | |
4912 | if (gids[i] == gid) | |
4913 | return 1; | |
4914 | ||
4915 | return 0; | |
4916 | } | |
4917 | ||
8092a428 LP |
4918 | int glob_exists(const char *path) { |
4919 | glob_t g; | |
4920 | int r, k; | |
4921 | ||
4922 | assert(path); | |
4923 | ||
4924 | zero(g); | |
4925 | errno = 0; | |
4926 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4927 | ||
4928 | if (k == GLOB_NOMATCH) | |
4929 | r = 0; | |
4930 | else if (k == GLOB_NOSPACE) | |
4931 | r = -ENOMEM; | |
4932 | else if (k == 0) | |
4933 | r = !strv_isempty(g.gl_pathv); | |
4934 | else | |
4935 | r = errno ? -errno : -EIO; | |
4936 | ||
4937 | globfree(&g); | |
4938 | ||
4939 | return r; | |
4940 | } | |
4941 | ||
83096483 LP |
4942 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4943 | struct stat st; | |
4944 | ||
4945 | assert(d); | |
4946 | assert(de); | |
4947 | ||
4948 | if (de->d_type != DT_UNKNOWN) | |
4949 | return 0; | |
4950 | ||
4951 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4952 | return -errno; | |
4953 | ||
4954 | de->d_type = | |
4955 | S_ISREG(st.st_mode) ? DT_REG : | |
4956 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4957 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4958 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4959 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4960 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4961 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4962 | DT_UNKNOWN; | |
4963 | ||
4964 | return 0; | |
4965 | } | |
4966 | ||
4967 | int in_search_path(const char *path, char **search) { | |
4968 | char **i, *parent; | |
4969 | int r; | |
4970 | ||
9eb977db | 4971 | r = path_get_parent(path, &parent); |
83096483 LP |
4972 | if (r < 0) |
4973 | return r; | |
4974 | ||
4975 | r = 0; | |
4976 | ||
4977 | STRV_FOREACH(i, search) { | |
4978 | if (path_equal(parent, *i)) { | |
4979 | r = 1; | |
4980 | break; | |
4981 | } | |
4982 | } | |
4983 | ||
4984 | free(parent); | |
4985 | ||
4986 | return r; | |
4987 | } | |
4988 | ||
034a2a52 LP |
4989 | int get_files_in_directory(const char *path, char ***list) { |
4990 | DIR *d; | |
4991 | int r = 0; | |
4992 | unsigned n = 0; | |
4993 | char **l = NULL; | |
4994 | ||
4995 | assert(path); | |
d60ef526 LP |
4996 | |
4997 | /* Returns all files in a directory in *list, and the number | |
4998 | * of files as return value. If list is NULL returns only the | |
4999 | * number */ | |
034a2a52 LP |
5000 | |
5001 | d = opendir(path); | |
8ea913b2 LP |
5002 | if (!d) |
5003 | return -errno; | |
5004 | ||
034a2a52 | 5005 | for (;;) { |
7d5e9c0f LP |
5006 | struct dirent *de; |
5007 | union dirent_storage buf; | |
034a2a52 LP |
5008 | int k; |
5009 | ||
7d5e9c0f | 5010 | k = readdir_r(d, &buf.de, &de); |
034a2a52 LP |
5011 | if (k != 0) { |
5012 | r = -k; | |
5013 | goto finish; | |
5014 | } | |
5015 | ||
5016 | if (!de) | |
5017 | break; | |
5018 | ||
5019 | dirent_ensure_type(d, de); | |
5020 | ||
5021 | if (!dirent_is_file(de)) | |
5022 | continue; | |
5023 | ||
d60ef526 LP |
5024 | if (list) { |
5025 | if ((unsigned) r >= n) { | |
5026 | char **t; | |
034a2a52 | 5027 | |
d60ef526 LP |
5028 | n = MAX(16, 2*r); |
5029 | t = realloc(l, sizeof(char*) * n); | |
5030 | if (!t) { | |
5031 | r = -ENOMEM; | |
5032 | goto finish; | |
5033 | } | |
034a2a52 | 5034 | |
d60ef526 LP |
5035 | l = t; |
5036 | } | |
034a2a52 | 5037 | |
d60ef526 | 5038 | assert((unsigned) r < n); |
034a2a52 | 5039 | |
d60ef526 LP |
5040 | l[r] = strdup(de->d_name); |
5041 | if (!l[r]) { | |
5042 | r = -ENOMEM; | |
5043 | goto finish; | |
5044 | } | |
034a2a52 | 5045 | |
d60ef526 LP |
5046 | l[++r] = NULL; |
5047 | } else | |
5048 | r++; | |
034a2a52 LP |
5049 | } |
5050 | ||
5051 | finish: | |
5052 | if (d) | |
5053 | closedir(d); | |
5054 | ||
d60ef526 LP |
5055 | if (r >= 0) { |
5056 | if (list) | |
5057 | *list = l; | |
5058 | } else | |
034a2a52 LP |
5059 | strv_free(l); |
5060 | ||
5061 | return r; | |
5062 | } | |
5063 | ||
b7def684 | 5064 | char *strjoin(const char *x, ...) { |
911a4828 LP |
5065 | va_list ap; |
5066 | size_t l; | |
5067 | char *r, *p; | |
5068 | ||
5069 | va_start(ap, x); | |
5070 | ||
5071 | if (x) { | |
5072 | l = strlen(x); | |
5073 | ||
5074 | for (;;) { | |
5075 | const char *t; | |
040f18ea | 5076 | size_t n; |
911a4828 LP |
5077 | |
5078 | t = va_arg(ap, const char *); | |
5079 | if (!t) | |
5080 | break; | |
5081 | ||
040f18ea | 5082 | n = strlen(t); |
e98055de LN |
5083 | if (n > ((size_t) -1) - l) { |
5084 | va_end(ap); | |
040f18ea | 5085 | return NULL; |
e98055de | 5086 | } |
040f18ea LP |
5087 | |
5088 | l += n; | |
911a4828 LP |
5089 | } |
5090 | } else | |
5091 | l = 0; | |
5092 | ||
5093 | va_end(ap); | |
5094 | ||
5095 | r = new(char, l+1); | |
5096 | if (!r) | |
5097 | return NULL; | |
5098 | ||
5099 | if (x) { | |
5100 | p = stpcpy(r, x); | |
5101 | ||
5102 | va_start(ap, x); | |
5103 | ||
5104 | for (;;) { | |
5105 | const char *t; | |
5106 | ||
5107 | t = va_arg(ap, const char *); | |
5108 | if (!t) | |
5109 | break; | |
5110 | ||
5111 | p = stpcpy(p, t); | |
5112 | } | |
8ea913b2 LP |
5113 | |
5114 | va_end(ap); | |
911a4828 LP |
5115 | } else |
5116 | r[0] = 0; | |
5117 | ||
5118 | return r; | |
5119 | } | |
5120 | ||
b636465b LP |
5121 | bool is_main_thread(void) { |
5122 | static __thread int cached = 0; | |
5123 | ||
5124 | if (_unlikely_(cached == 0)) | |
5125 | cached = getpid() == gettid() ? 1 : -1; | |
5126 | ||
5127 | return cached > 0; | |
5128 | } | |
5129 | ||
94959f0f LP |
5130 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
5131 | char *p, *s; | |
5132 | int r; | |
5133 | unsigned n, m; | |
5134 | ||
5135 | assert(ret); | |
5136 | ||
5137 | /* If it has a queue this is good enough for us */ | |
5138 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
5139 | return -ENOMEM; | |
5140 | ||
5141 | r = access(p, F_OK); | |
5142 | free(p); | |
5143 | ||
5144 | if (r >= 0) { | |
5145 | *ret = d; | |
5146 | return 0; | |
5147 | } | |
5148 | ||
5149 | /* If it is a partition find the originating device */ | |
5150 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
5151 | return -ENOMEM; | |
5152 | ||
5153 | r = access(p, F_OK); | |
5154 | free(p); | |
5155 | ||
5156 | if (r < 0) | |
5157 | return -ENOENT; | |
5158 | ||
5159 | /* Get parent dev_t */ | |
5160 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
5161 | return -ENOMEM; | |
5162 | ||
5163 | r = read_one_line_file(p, &s); | |
5164 | free(p); | |
5165 | ||
5166 | if (r < 0) | |
5167 | return r; | |
5168 | ||
5169 | r = sscanf(s, "%u:%u", &m, &n); | |
5170 | free(s); | |
5171 | ||
5172 | if (r != 2) | |
5173 | return -EINVAL; | |
5174 | ||
5175 | /* Only return this if it is really good enough for us. */ | |
5176 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
5177 | return -ENOMEM; | |
5178 | ||
5179 | r = access(p, F_OK); | |
5180 | free(p); | |
5181 | ||
5182 | if (r >= 0) { | |
5183 | *ret = makedev(m, n); | |
5184 | return 0; | |
5185 | } | |
5186 | ||
5187 | return -ENOENT; | |
5188 | } | |
5189 | ||
8d53b453 | 5190 | int file_is_priv_sticky(const char *p) { |
ad293f5a LP |
5191 | struct stat st; |
5192 | ||
5193 | assert(p); | |
5194 | ||
5195 | if (lstat(p, &st) < 0) | |
5196 | return -errno; | |
5197 | ||
5198 | return | |
8d53b453 | 5199 | (st.st_uid == 0 || st.st_uid == getuid()) && |
ad293f5a LP |
5200 | (st.st_mode & S_ISVTX); |
5201 | } | |
94959f0f | 5202 | |
f41607a6 LP |
5203 | static const char *const ioprio_class_table[] = { |
5204 | [IOPRIO_CLASS_NONE] = "none", | |
5205 | [IOPRIO_CLASS_RT] = "realtime", | |
5206 | [IOPRIO_CLASS_BE] = "best-effort", | |
5207 | [IOPRIO_CLASS_IDLE] = "idle" | |
5208 | }; | |
5209 | ||
5210 | DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int); | |
5211 | ||
5212 | static const char *const sigchld_code_table[] = { | |
5213 | [CLD_EXITED] = "exited", | |
5214 | [CLD_KILLED] = "killed", | |
5215 | [CLD_DUMPED] = "dumped", | |
5216 | [CLD_TRAPPED] = "trapped", | |
5217 | [CLD_STOPPED] = "stopped", | |
5218 | [CLD_CONTINUED] = "continued", | |
5219 | }; | |
5220 | ||
5221 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
5222 | ||
5223 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
5224 | [LOG_FAC(LOG_KERN)] = "kern", | |
5225 | [LOG_FAC(LOG_USER)] = "user", | |
5226 | [LOG_FAC(LOG_MAIL)] = "mail", | |
5227 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
5228 | [LOG_FAC(LOG_AUTH)] = "auth", | |
5229 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
5230 | [LOG_FAC(LOG_LPR)] = "lpr", | |
5231 | [LOG_FAC(LOG_NEWS)] = "news", | |
5232 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
5233 | [LOG_FAC(LOG_CRON)] = "cron", | |
5234 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
5235 | [LOG_FAC(LOG_FTP)] = "ftp", | |
5236 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
5237 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
5238 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
5239 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
5240 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
5241 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
5242 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
5243 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
5244 | }; | |
5245 | ||
5246 | DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int); | |
5247 | ||
5248 | static const char *const log_level_table[] = { | |
5249 | [LOG_EMERG] = "emerg", | |
5250 | [LOG_ALERT] = "alert", | |
5251 | [LOG_CRIT] = "crit", | |
5252 | [LOG_ERR] = "err", | |
5253 | [LOG_WARNING] = "warning", | |
5254 | [LOG_NOTICE] = "notice", | |
5255 | [LOG_INFO] = "info", | |
5256 | [LOG_DEBUG] = "debug" | |
5257 | }; | |
5258 | ||
5259 | DEFINE_STRING_TABLE_LOOKUP(log_level, int); | |
5260 | ||
5261 | static const char* const sched_policy_table[] = { | |
5262 | [SCHED_OTHER] = "other", | |
5263 | [SCHED_BATCH] = "batch", | |
5264 | [SCHED_IDLE] = "idle", | |
5265 | [SCHED_FIFO] = "fifo", | |
5266 | [SCHED_RR] = "rr" | |
5267 | }; | |
5268 | ||
5269 | DEFINE_STRING_TABLE_LOOKUP(sched_policy, int); | |
5270 | ||
5271 | static const char* const rlimit_table[] = { | |
5272 | [RLIMIT_CPU] = "LimitCPU", | |
5273 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
5274 | [RLIMIT_DATA] = "LimitDATA", | |
5275 | [RLIMIT_STACK] = "LimitSTACK", | |
5276 | [RLIMIT_CORE] = "LimitCORE", | |
5277 | [RLIMIT_RSS] = "LimitRSS", | |
5278 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
5279 | [RLIMIT_AS] = "LimitAS", | |
5280 | [RLIMIT_NPROC] = "LimitNPROC", | |
5281 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
5282 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
5283 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
5284 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
5285 | [RLIMIT_NICE] = "LimitNICE", | |
5286 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
5287 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
5288 | }; | |
5289 | ||
5290 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
5291 | ||
5292 | static const char* const ip_tos_table[] = { | |
5293 | [IPTOS_LOWDELAY] = "low-delay", | |
5294 | [IPTOS_THROUGHPUT] = "throughput", | |
5295 | [IPTOS_RELIABILITY] = "reliability", | |
5296 | [IPTOS_LOWCOST] = "low-cost", | |
5297 | }; | |
5298 | ||
5299 | DEFINE_STRING_TABLE_LOOKUP(ip_tos, int); | |
5300 | ||
4e240ab0 | 5301 | static const char *const __signal_table[] = { |
f41607a6 LP |
5302 | [SIGHUP] = "HUP", |
5303 | [SIGINT] = "INT", | |
5304 | [SIGQUIT] = "QUIT", | |
5305 | [SIGILL] = "ILL", | |
5306 | [SIGTRAP] = "TRAP", | |
5307 | [SIGABRT] = "ABRT", | |
5308 | [SIGBUS] = "BUS", | |
5309 | [SIGFPE] = "FPE", | |
5310 | [SIGKILL] = "KILL", | |
5311 | [SIGUSR1] = "USR1", | |
5312 | [SIGSEGV] = "SEGV", | |
5313 | [SIGUSR2] = "USR2", | |
5314 | [SIGPIPE] = "PIPE", | |
5315 | [SIGALRM] = "ALRM", | |
5316 | [SIGTERM] = "TERM", | |
5317 | #ifdef SIGSTKFLT | |
5318 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
5319 | #endif | |
5320 | [SIGCHLD] = "CHLD", | |
5321 | [SIGCONT] = "CONT", | |
5322 | [SIGSTOP] = "STOP", | |
5323 | [SIGTSTP] = "TSTP", | |
5324 | [SIGTTIN] = "TTIN", | |
5325 | [SIGTTOU] = "TTOU", | |
5326 | [SIGURG] = "URG", | |
5327 | [SIGXCPU] = "XCPU", | |
5328 | [SIGXFSZ] = "XFSZ", | |
5329 | [SIGVTALRM] = "VTALRM", | |
5330 | [SIGPROF] = "PROF", | |
5331 | [SIGWINCH] = "WINCH", | |
5332 | [SIGIO] = "IO", | |
5333 | [SIGPWR] = "PWR", | |
5334 | [SIGSYS] = "SYS" | |
5335 | }; | |
5336 | ||
4e240ab0 MS |
5337 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
5338 | ||
5339 | const char *signal_to_string(int signo) { | |
5340 | static __thread char buf[12]; | |
5341 | const char *name; | |
5342 | ||
5343 | name = __signal_to_string(signo); | |
5344 | if (name) | |
5345 | return name; | |
5346 | ||
5347 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
5348 | snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN); | |
5349 | else | |
5350 | snprintf(buf, sizeof(buf) - 1, "%d", signo); | |
5351 | char_array_0(buf); | |
5352 | return buf; | |
5353 | } | |
5354 | ||
5355 | int signal_from_string(const char *s) { | |
5356 | int signo; | |
5357 | int offset = 0; | |
5358 | unsigned u; | |
5359 | ||
040f18ea | 5360 | signo = __signal_from_string(s); |
4e240ab0 MS |
5361 | if (signo > 0) |
5362 | return signo; | |
5363 | ||
5364 | if (startswith(s, "RTMIN+")) { | |
5365 | s += 6; | |
5366 | offset = SIGRTMIN; | |
5367 | } | |
5368 | if (safe_atou(s, &u) >= 0) { | |
5369 | signo = (int) u + offset; | |
5370 | if (signo > 0 && signo < _NSIG) | |
5371 | return signo; | |
5372 | } | |
5373 | return -1; | |
5374 | } | |
65457142 FC |
5375 | |
5376 | bool kexec_loaded(void) { | |
5377 | bool loaded = false; | |
5378 | char *s; | |
5379 | ||
5380 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
5381 | if (s[0] == '1') | |
5382 | loaded = true; | |
5383 | free(s); | |
5384 | } | |
5385 | return loaded; | |
5386 | } | |
fb9de93d LP |
5387 | |
5388 | int strdup_or_null(const char *a, char **b) { | |
5389 | char *c; | |
5390 | ||
5391 | assert(b); | |
5392 | ||
5393 | if (!a) { | |
5394 | *b = NULL; | |
5395 | return 0; | |
5396 | } | |
5397 | ||
5398 | c = strdup(a); | |
5399 | if (!c) | |
5400 | return -ENOMEM; | |
5401 | ||
5402 | *b = c; | |
5403 | return 0; | |
5404 | } | |
64685e0c | 5405 | |
87d2c1ff LP |
5406 | int prot_from_flags(int flags) { |
5407 | ||
5408 | switch (flags & O_ACCMODE) { | |
5409 | ||
5410 | case O_RDONLY: | |
5411 | return PROT_READ; | |
5412 | ||
5413 | case O_WRONLY: | |
5414 | return PROT_WRITE; | |
5415 | ||
5416 | case O_RDWR: | |
5417 | return PROT_READ|PROT_WRITE; | |
5418 | ||
5419 | default: | |
5420 | return -EINVAL; | |
5421 | } | |
7c99e0c1 | 5422 | } |
689b9a22 | 5423 | |
babfc091 | 5424 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 5425 | unsigned i; |
babfc091 LP |
5426 | |
5427 | static const struct { | |
5428 | const char *suffix; | |
5429 | off_t factor; | |
5430 | } table[] = { | |
32895bb3 LP |
5431 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
5432 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
5433 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
5434 | { "G", 1024ULL*1024ULL*1024ULL }, | |
5435 | { "M", 1024ULL*1024ULL }, | |
5436 | { "K", 1024ULL }, | |
5437 | }; | |
5438 | ||
5439 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
5440 | ||
5441 | if (t >= table[i].factor) { | |
5442 | snprintf(buf, l, | |
5443 | "%llu.%llu%s", | |
5444 | (unsigned long long) (t / table[i].factor), | |
5445 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
5446 | table[i].suffix); | |
5447 | ||
5448 | goto finish; | |
5449 | } | |
5450 | } | |
5451 | ||
5452 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
5453 | ||
5454 | finish: | |
5455 | buf[l-1] = 0; | |
5456 | return buf; | |
5457 | ||
5458 | } | |
55d7bfc1 LP |
5459 | |
5460 | void* memdup(const void *p, size_t l) { | |
5461 | void *r; | |
5462 | ||
5463 | assert(p); | |
5464 | ||
5465 | r = malloc(l); | |
5466 | if (!r) | |
5467 | return NULL; | |
5468 | ||
5469 | memcpy(r, p, l); | |
5470 | return r; | |
5471 | } | |
bb99a35a LP |
5472 | |
5473 | int fd_inc_sndbuf(int fd, size_t n) { | |
5474 | int r, value; | |
5475 | socklen_t l = sizeof(value); | |
5476 | ||
5477 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
5478 | if (r >= 0 && | |
5479 | l == sizeof(value) && | |
5480 | (size_t) value >= n*2) | |
5481 | return 0; | |
5482 | ||
5483 | value = (int) n; | |
5484 | r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)); | |
5485 | if (r < 0) | |
5486 | return -errno; | |
5487 | ||
5488 | return 1; | |
5489 | } | |
5490 | ||
5491 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5492 | int r, value; | |
5493 | socklen_t l = sizeof(value); | |
5494 | ||
5495 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
5496 | if (r >= 0 && | |
5497 | l == sizeof(value) && | |
5498 | (size_t) value >= n*2) | |
5499 | return 0; | |
5500 | ||
5501 | value = (int) n; | |
5502 | r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)); | |
5503 | if (r < 0) | |
5504 | return -errno; | |
5505 | ||
5506 | return 1; | |
5507 | } | |
6bb92a16 | 5508 | |
9bdc770c | 5509 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 LP |
5510 | pid_t parent_pid, agent_pid; |
5511 | int fd; | |
5512 | bool stdout_is_tty, stderr_is_tty; | |
5513 | unsigned n, i; | |
5514 | va_list ap; | |
5515 | char **l; | |
5516 | ||
5517 | assert(pid); | |
5518 | assert(path); | |
5519 | ||
5520 | parent_pid = getpid(); | |
5521 | ||
5522 | /* Spawns a temporary TTY agent, making sure it goes away when | |
5523 | * we go away */ | |
5524 | ||
5525 | agent_pid = fork(); | |
5526 | if (agent_pid < 0) | |
5527 | return -errno; | |
5528 | ||
5529 | if (agent_pid != 0) { | |
5530 | *pid = agent_pid; | |
5531 | return 0; | |
5532 | } | |
5533 | ||
5534 | /* In the child: | |
5535 | * | |
5536 | * Make sure the agent goes away when the parent dies */ | |
5537 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5538 | _exit(EXIT_FAILURE); | |
5539 | ||
5540 | /* Check whether our parent died before we were able | |
5541 | * to set the death signal */ | |
5542 | if (getppid() != parent_pid) | |
5543 | _exit(EXIT_SUCCESS); | |
5544 | ||
5545 | /* Don't leak fds to the agent */ | |
9bdc770c | 5546 | close_all_fds(except, n_except); |
6bb92a16 LP |
5547 | |
5548 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5549 | stderr_is_tty = isatty(STDERR_FILENO); | |
5550 | ||
5551 | if (!stdout_is_tty || !stderr_is_tty) { | |
5552 | /* Detach from stdout/stderr. and reopen | |
5553 | * /dev/tty for them. This is important to | |
5554 | * ensure that when systemctl is started via | |
5555 | * popen() or a similar call that expects to | |
5556 | * read EOF we actually do generate EOF and | |
5557 | * not delay this indefinitely by because we | |
5558 | * keep an unused copy of stdin around. */ | |
5559 | fd = open("/dev/tty", O_WRONLY); | |
5560 | if (fd < 0) { | |
5561 | log_error("Failed to open /dev/tty: %m"); | |
5562 | _exit(EXIT_FAILURE); | |
5563 | } | |
5564 | ||
5565 | if (!stdout_is_tty) | |
5566 | dup2(fd, STDOUT_FILENO); | |
5567 | ||
5568 | if (!stderr_is_tty) | |
5569 | dup2(fd, STDERR_FILENO); | |
5570 | ||
5571 | if (fd > 2) | |
5572 | close(fd); | |
5573 | } | |
5574 | ||
5575 | /* Count arguments */ | |
5576 | va_start(ap, path); | |
5577 | for (n = 0; va_arg(ap, char*); n++) | |
5578 | ; | |
5579 | va_end(ap); | |
5580 | ||
5581 | /* Allocate strv */ | |
5582 | l = alloca(sizeof(char *) * (n + 1)); | |
5583 | ||
5584 | /* Fill in arguments */ | |
5585 | va_start(ap, path); | |
5586 | for (i = 0; i <= n; i++) | |
5587 | l[i] = va_arg(ap, char*); | |
5588 | va_end(ap); | |
5589 | ||
5590 | execv(path, l); | |
5591 | _exit(EXIT_FAILURE); | |
5592 | } | |
68faf98c LP |
5593 | |
5594 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5595 | struct rlimit highest, fixed; | |
5596 | ||
5597 | assert(rlim); | |
5598 | ||
5599 | if (setrlimit(resource, rlim) >= 0) | |
5600 | return 0; | |
5601 | ||
5602 | if (errno != EPERM) | |
5603 | return -errno; | |
5604 | ||
5605 | /* So we failed to set the desired setrlimit, then let's try | |
5606 | * to get as close as we can */ | |
5607 | assert_se(getrlimit(resource, &highest) == 0); | |
5608 | ||
5609 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5610 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5611 | ||
5612 | if (setrlimit(resource, &fixed) < 0) | |
5613 | return -errno; | |
5614 | ||
5615 | return 0; | |
5616 | } | |
3d9a4122 | 5617 | |
ab94af92 LP |
5618 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
5619 | char path[sizeof("/proc/")-1+10+sizeof("/environ")], *value = NULL; | |
5620 | int r; | |
5621 | FILE *f; | |
5622 | bool done = false; | |
5623 | size_t l; | |
5624 | ||
5625 | assert(field); | |
5626 | assert(_value); | |
5627 | ||
5628 | if (pid == 0) | |
5629 | pid = getpid(); | |
5630 | ||
5631 | snprintf(path, sizeof(path), "/proc/%lu/environ", (unsigned long) pid); | |
5632 | char_array_0(path); | |
5633 | ||
5634 | f = fopen(path, "re"); | |
5635 | if (!f) | |
5636 | return -errno; | |
5637 | ||
5638 | l = strlen(field); | |
5639 | r = 0; | |
5640 | ||
5641 | do { | |
5642 | char line[LINE_MAX]; | |
5643 | unsigned i; | |
5644 | ||
5645 | for (i = 0; i < sizeof(line)-1; i++) { | |
5646 | int c; | |
5647 | ||
5648 | c = getc(f); | |
5649 | if (_unlikely_(c == EOF)) { | |
5650 | done = true; | |
5651 | break; | |
5652 | } else if (c == 0) | |
5653 | break; | |
5654 | ||
5655 | line[i] = c; | |
5656 | } | |
5657 | line[i] = 0; | |
5658 | ||
5659 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5660 | value = strdup(line + l + 1); | |
5661 | if (!value) { | |
5662 | r = -ENOMEM; | |
5663 | break; | |
5664 | } | |
5665 | ||
5666 | r = 1; | |
5667 | break; | |
5668 | } | |
5669 | ||
5670 | } while (!done); | |
5671 | ||
5672 | fclose(f); | |
5673 | ||
5674 | if (r >= 0) | |
5675 | *_value = value; | |
5676 | ||
5677 | return r; | |
5678 | } | |
d889a206 LP |
5679 | |
5680 | int can_sleep(const char *type) { | |
e67f47e5 | 5681 | char *w, *state; |
d889a206 | 5682 | size_t l, k; |
d889a206 | 5683 | int r; |
e67f47e5 | 5684 | _cleanup_free_ char *p = NULL; |
d889a206 LP |
5685 | |
5686 | assert(type); | |
5687 | ||
5688 | r = read_one_line_file("/sys/power/state", &p); | |
5689 | if (r < 0) | |
5690 | return r == -ENOENT ? 0 : r; | |
5691 | ||
5692 | k = strlen(type); | |
e67f47e5 LP |
5693 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) |
5694 | if (l == k && memcmp(w, type, l) == 0) | |
5695 | return true; | |
d889a206 | 5696 | |
e67f47e5 | 5697 | return false; |
d889a206 | 5698 | } |
49dbfa7b | 5699 | |
6524990f LP |
5700 | int can_sleep_disk(const char *type) { |
5701 | char *w, *state; | |
5702 | size_t l, k; | |
5703 | int r; | |
5704 | _cleanup_free_ char *p = NULL; | |
5705 | ||
5706 | assert(type); | |
5707 | ||
5708 | r = read_one_line_file("/sys/power/disk", &p); | |
5709 | if (r < 0) | |
5710 | return r == -ENOENT ? 0 : r; | |
5711 | ||
5712 | k = strlen(type); | |
5713 | FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) { | |
5714 | if (l == k && memcmp(w, type, l) == 0) | |
5715 | return true; | |
5716 | ||
5717 | if (l == k + 2 && w[0] == '[' && memcmp(w + 1, type, l - 2) == 0 && w[l-1] == ']') | |
5718 | return true; | |
5719 | } | |
5720 | ||
5721 | return false; | |
5722 | } | |
5723 | ||
49dbfa7b LP |
5724 | bool is_valid_documentation_url(const char *url) { |
5725 | assert(url); | |
5726 | ||
5727 | if (startswith(url, "http://") && url[7]) | |
5728 | return true; | |
5729 | ||
5730 | if (startswith(url, "https://") && url[8]) | |
5731 | return true; | |
5732 | ||
5733 | if (startswith(url, "file:") && url[5]) | |
5734 | return true; | |
5735 | ||
5736 | if (startswith(url, "info:") && url[5]) | |
5737 | return true; | |
5738 | ||
5739 | if (startswith(url, "man:") && url[4]) | |
5740 | return true; | |
5741 | ||
5742 | return false; | |
5743 | } | |
9be346c9 HH |
5744 | |
5745 | bool in_initrd(void) { | |
a05f97b3 | 5746 | static __thread int saved = -1; |
825c6fe5 | 5747 | struct statfs s; |
8f33b5b8 | 5748 | |
825c6fe5 LP |
5749 | if (saved >= 0) |
5750 | return saved; | |
5751 | ||
5752 | /* We make two checks here: | |
5753 | * | |
5754 | * 1. the flag file /etc/initrd-release must exist | |
5755 | * 2. the root file system must be a memory file system | |
5756 | * | |
5757 | * The second check is extra paranoia, since misdetecting an | |
5758 | * initrd can have bad bad consequences due the initrd | |
5759 | * emptying when transititioning to the main systemd. | |
5760 | */ | |
5761 | ||
5762 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5763 | statfs("/", &s) >= 0 && | |
5764 | (s.f_type == TMPFS_MAGIC || s.f_type == RAMFS_MAGIC); | |
9be346c9 | 5765 | |
8f33b5b8 | 5766 | return saved; |
9be346c9 | 5767 | } |
069cfc85 LP |
5768 | |
5769 | void warn_melody(void) { | |
e67f47e5 | 5770 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5771 | |
5772 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5773 | if (fd < 0) | |
5774 | return; | |
5775 | ||
040f18ea | 5776 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5777 | |
5778 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5779 | usleep(125*USEC_PER_MSEC); | |
5780 | ||
5781 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5782 | usleep(125*USEC_PER_MSEC); | |
5783 | ||
5784 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5785 | usleep(125*USEC_PER_MSEC); | |
5786 | ||
5787 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5788 | } |
cd3bd60a LP |
5789 | |
5790 | int make_console_stdio(void) { | |
5791 | int fd, r; | |
5792 | ||
5793 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5794 | ||
5795 | fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1); | |
5796 | if (fd < 0) { | |
5797 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
5798 | return fd; | |
5799 | } | |
5800 | ||
5801 | r = make_stdio(fd); | |
5802 | if (r < 0) { | |
5803 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
5804 | return r; | |
5805 | } | |
5806 | ||
5807 | return 0; | |
5808 | } | |
7c5f152a LP |
5809 | |
5810 | int get_home_dir(char **_h) { | |
5811 | char *h; | |
5812 | const char *e; | |
5813 | uid_t u; | |
5814 | struct passwd *p; | |
5815 | ||
5816 | assert(_h); | |
5817 | ||
5818 | /* Take the user specified one */ | |
5819 | e = getenv("HOME"); | |
5820 | if (e) { | |
5821 | h = strdup(e); | |
5822 | if (!h) | |
5823 | return -ENOMEM; | |
5824 | ||
5825 | *_h = h; | |
5826 | return 0; | |
5827 | } | |
5828 | ||
5829 | /* Hardcode home directory for root to avoid NSS */ | |
5830 | u = getuid(); | |
5831 | if (u == 0) { | |
5832 | h = strdup("/root"); | |
5833 | if (!h) | |
5834 | return -ENOMEM; | |
5835 | ||
5836 | *_h = h; | |
5837 | return 0; | |
5838 | } | |
5839 | ||
5840 | /* Check the database... */ | |
5841 | errno = 0; | |
5842 | p = getpwuid(u); | |
5843 | if (!p) | |
e67f47e5 | 5844 | return errno ? -errno : -ESRCH; |
7c5f152a LP |
5845 | |
5846 | if (!path_is_absolute(p->pw_dir)) | |
5847 | return -EINVAL; | |
5848 | ||
5849 | h = strdup(p->pw_dir); | |
5850 | if (!h) | |
5851 | return -ENOMEM; | |
5852 | ||
5853 | *_h = h; | |
5854 | return 0; | |
5855 | } | |
5856 | ||
5857 | int get_shell(char **_sh) { | |
5858 | char *sh; | |
5859 | const char *e; | |
5860 | uid_t u; | |
5861 | struct passwd *p; | |
5862 | ||
5863 | assert(_sh); | |
5864 | ||
5865 | /* Take the user specified one */ | |
5866 | e = getenv("SHELL"); | |
5867 | if (e) { | |
5868 | sh = strdup(e); | |
5869 | if (!sh) | |
5870 | return -ENOMEM; | |
5871 | ||
5872 | *_sh = sh; | |
5873 | return 0; | |
5874 | } | |
5875 | ||
5876 | /* Hardcode home directory for root to avoid NSS */ | |
5877 | u = getuid(); | |
5878 | if (u == 0) { | |
5879 | sh = strdup("/bin/sh"); | |
5880 | if (!sh) | |
5881 | return -ENOMEM; | |
5882 | ||
5883 | *_sh = sh; | |
5884 | return 0; | |
5885 | } | |
5886 | ||
5887 | /* Check the database... */ | |
5888 | errno = 0; | |
5889 | p = getpwuid(u); | |
5890 | if (!p) | |
5891 | return errno ? -errno : -ESRCH; | |
5892 | ||
5893 | if (!path_is_absolute(p->pw_shell)) | |
5894 | return -EINVAL; | |
5895 | ||
5896 | sh = strdup(p->pw_shell); | |
5897 | if (!sh) | |
5898 | return -ENOMEM; | |
5899 | ||
5900 | *_sh = sh; | |
5901 | return 0; | |
5902 | } | |
2fbe635a LP |
5903 | |
5904 | void freep(void *p) { | |
5905 | free(*(void**) p); | |
5906 | } | |
5907 | ||
5908 | void fclosep(FILE **f) { | |
5909 | if (*f) | |
5910 | fclose(*f); | |
5911 | } | |
e67f47e5 LP |
5912 | |
5913 | void closep(int *fd) { | |
5914 | if (*fd >= 0) | |
5915 | close_nointr_nofail(*fd); | |
5916 | } | |
a05f97b3 LP |
5917 | |
5918 | void closedirp(DIR **d) { | |
5919 | if (*d) | |
5920 | closedir(*d); | |
5921 | } | |
25ea79fe ZJS |
5922 | |
5923 | void umaskp(mode_t *u) { | |
5924 | umask(*u); | |
5925 | } | |
0b507b17 LP |
5926 | |
5927 | bool filename_is_safe(const char *p) { | |
5928 | ||
5929 | if (isempty(p)) | |
5930 | return false; | |
5931 | ||
5932 | if (strchr(p, '/')) | |
5933 | return false; | |
5934 | ||
5935 | if (streq(p, ".")) | |
5936 | return false; | |
5937 | ||
5938 | if (streq(p, "..")) | |
5939 | return false; | |
5940 | ||
5941 | if (strlen(p) > FILENAME_MAX) | |
5942 | return false; | |
5943 | ||
5944 | return true; | |
5945 | } | |
5946 | ||
5947 | bool string_is_safe(const char *p) { | |
5948 | const char *t; | |
5949 | ||
5950 | assert(p); | |
5951 | ||
5952 | for (t = p; *t; t++) { | |
01539d6e | 5953 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5954 | return false; |
5955 | ||
011afa76 | 5956 | if (strchr("\\\"\'", *t)) |
0b507b17 LP |
5957 | return false; |
5958 | } | |
5959 | ||
5960 | return true; | |
5961 | } | |
cfbc22ab LP |
5962 | |
5963 | int parse_timestamp(const char *t, usec_t *usec) { | |
5964 | const char *k; | |
5965 | struct tm tm, copy; | |
5966 | time_t x; | |
5967 | usec_t plus = 0, minus = 0, ret; | |
5968 | int r; | |
5969 | ||
5970 | /* | |
5971 | * Allowed syntaxes: | |
5972 | * | |
5973 | * 2012-09-22 16:34:22 | |
5974 | * 2012-09-22 16:34 (seconds will be set to 0) | |
5975 | * 2012-09-22 (time will be set to 00:00:00) | |
5976 | * 16:34:22 (date will be set to today) | |
5977 | * 16:34 (date will be set to today, seconds to 0) | |
5978 | * now | |
5979 | * yesterday (time is set to 00:00:00) | |
5980 | * today (time is set to 00:00:00) | |
5981 | * tomorrow (time is set to 00:00:00) | |
5982 | * +5min | |
5983 | * -5days | |
5984 | * | |
5985 | */ | |
5986 | ||
5987 | assert(t); | |
5988 | assert(usec); | |
5989 | ||
5990 | x = time(NULL); | |
5991 | assert_se(localtime_r(&x, &tm)); | |
5992 | ||
5993 | if (streq(t, "now")) | |
5994 | goto finish; | |
5995 | ||
5996 | else if (streq(t, "today")) { | |
5997 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
5998 | goto finish; | |
5999 | ||
6000 | } else if (streq(t, "yesterday")) { | |
6001 | tm.tm_mday --; | |
6002 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
6003 | goto finish; | |
6004 | ||
6005 | } else if (streq(t, "tomorrow")) { | |
6006 | tm.tm_mday ++; | |
6007 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
6008 | goto finish; | |
6009 | ||
6010 | } else if (t[0] == '+') { | |
6011 | ||
6012 | r = parse_usec(t+1, &plus); | |
6013 | if (r < 0) | |
6014 | return r; | |
6015 | ||
6016 | goto finish; | |
6017 | } else if (t[0] == '-') { | |
6018 | ||
6019 | r = parse_usec(t+1, &minus); | |
6020 | if (r < 0) | |
6021 | return r; | |
6022 | ||
6023 | goto finish; | |
6024 | } | |
6025 | ||
6026 | copy = tm; | |
6027 | k = strptime(t, "%y-%m-%d %H:%M:%S", &tm); | |
6028 | if (k && *k == 0) | |
6029 | goto finish; | |
6030 | ||
6031 | tm = copy; | |
6032 | k = strptime(t, "%Y-%m-%d %H:%M:%S", &tm); | |
6033 | if (k && *k == 0) | |
6034 | goto finish; | |
6035 | ||
6036 | tm = copy; | |
6037 | k = strptime(t, "%y-%m-%d %H:%M", &tm); | |
6038 | if (k && *k == 0) { | |
6039 | tm.tm_sec = 0; | |
6040 | goto finish; | |
6041 | } | |
6042 | ||
6043 | tm = copy; | |
6044 | k = strptime(t, "%Y-%m-%d %H:%M", &tm); | |
6045 | if (k && *k == 0) { | |
6046 | tm.tm_sec = 0; | |
6047 | goto finish; | |
6048 | } | |
6049 | ||
6050 | tm = copy; | |
6051 | k = strptime(t, "%y-%m-%d", &tm); | |
6052 | if (k && *k == 0) { | |
6053 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
6054 | goto finish; | |
6055 | } | |
6056 | ||
6057 | tm = copy; | |
6058 | k = strptime(t, "%Y-%m-%d", &tm); | |
6059 | if (k && *k == 0) { | |
6060 | tm.tm_sec = tm.tm_min = tm.tm_hour = 0; | |
6061 | goto finish; | |
6062 | } | |
6063 | ||
6064 | tm = copy; | |
6065 | k = strptime(t, "%H:%M:%S", &tm); | |
6066 | if (k && *k == 0) | |
6067 | goto finish; | |
6068 | ||
6069 | tm = copy; | |
6070 | k = strptime(t, "%H:%M", &tm); | |
6071 | if (k && *k == 0) { | |
6072 | tm.tm_sec = 0; | |
6073 | goto finish; | |
6074 | } | |
6075 | ||
6076 | return -EINVAL; | |
6077 | ||
6078 | finish: | |
6079 | x = mktime(&tm); | |
6080 | if (x == (time_t) -1) | |
6081 | return -EINVAL; | |
6082 | ||
6083 | ret = (usec_t) x * USEC_PER_SEC; | |
6084 | ||
6085 | ret += plus; | |
6086 | if (ret > minus) | |
6087 | ret -= minus; | |
6088 | else | |
6089 | ret = 0; | |
6090 | ||
6091 | *usec = ret; | |
6092 | ||
6093 | return 0; | |
6094 | } | |
a9e12476 KS |
6095 | |
6096 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ | |
6097 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 6098 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
6099 | size_t l, u, idx; |
6100 | const void *p; | |
6101 | int comparison; | |
6102 | ||
6103 | l = 0; | |
6104 | u = nmemb; | |
6105 | while (l < u) { | |
6106 | idx = (l + u) / 2; | |
6107 | p = (void *)(((const char *) base) + (idx * size)); | |
6108 | comparison = compar(key, p, arg); | |
6109 | if (comparison < 0) | |
6110 | u = idx; | |
6111 | else if (comparison > 0) | |
6112 | l = idx + 1; | |
6113 | else | |
6114 | return (void *)p; | |
6115 | } | |
6116 | return NULL; | |
6117 | } |