]>
Commit | Line | Data |
---|---|---|
d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
60918275 LP |
22 | #include <assert.h> |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
85261803 | 26 | #include <stdlib.h> |
034c6ed7 LP |
27 | #include <signal.h> |
28 | #include <stdio.h> | |
1dccbe19 LP |
29 | #include <syslog.h> |
30 | #include <sched.h> | |
31 | #include <sys/resource.h> | |
ef886c6a | 32 | #include <linux/sched.h> |
a9f5d454 LP |
33 | #include <sys/types.h> |
34 | #include <sys/stat.h> | |
3a0ecb08 | 35 | #include <fcntl.h> |
a0d40ac5 | 36 | #include <dirent.h> |
601f6a1e LP |
37 | #include <sys/ioctl.h> |
38 | #include <linux/vt.h> | |
39 | #include <linux/tiocl.h> | |
80876c20 LP |
40 | #include <termios.h> |
41 | #include <stdarg.h> | |
42 | #include <sys/inotify.h> | |
43 | #include <sys/poll.h> | |
8d567588 | 44 | #include <libgen.h> |
3177a7fa | 45 | #include <ctype.h> |
5b6319dc | 46 | #include <sys/prctl.h> |
ef2f1067 LP |
47 | #include <sys/utsname.h> |
48 | #include <pwd.h> | |
4fd5948e | 49 | #include <netinet/ip.h> |
3fe5e5d4 | 50 | #include <linux/kd.h> |
afea26ad | 51 | #include <dlfcn.h> |
2e78aa99 | 52 | #include <sys/wait.h> |
60918275 LP |
53 | |
54 | #include "macro.h" | |
55 | #include "util.h" | |
1dccbe19 LP |
56 | #include "ioprio.h" |
57 | #include "missing.h" | |
a9f5d454 | 58 | #include "log.h" |
65d2ebdc | 59 | #include "strv.h" |
e51bc1a2 | 60 | #include "label.h" |
d06dacd0 | 61 | #include "exit-status.h" |
56cf987f | 62 | |
e05797fb LP |
63 | bool streq_ptr(const char *a, const char *b) { |
64 | ||
65 | /* Like streq(), but tries to make sense of NULL pointers */ | |
66 | ||
67 | if (a && b) | |
68 | return streq(a, b); | |
69 | ||
70 | if (!a && !b) | |
71 | return true; | |
72 | ||
73 | return false; | |
74 | } | |
75 | ||
47be870b | 76 | usec_t now(clockid_t clock_id) { |
60918275 LP |
77 | struct timespec ts; |
78 | ||
47be870b | 79 | assert_se(clock_gettime(clock_id, &ts) == 0); |
60918275 LP |
80 | |
81 | return timespec_load(&ts); | |
82 | } | |
83 | ||
63983207 | 84 | dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { |
871d7de4 LP |
85 | assert(ts); |
86 | ||
87 | ts->realtime = now(CLOCK_REALTIME); | |
88 | ts->monotonic = now(CLOCK_MONOTONIC); | |
89 | ||
90 | return ts; | |
91 | } | |
92 | ||
60918275 LP |
93 | usec_t timespec_load(const struct timespec *ts) { |
94 | assert(ts); | |
95 | ||
96 | return | |
97 | (usec_t) ts->tv_sec * USEC_PER_SEC + | |
98 | (usec_t) ts->tv_nsec / NSEC_PER_USEC; | |
99 | } | |
100 | ||
101 | struct timespec *timespec_store(struct timespec *ts, usec_t u) { | |
102 | assert(ts); | |
103 | ||
104 | ts->tv_sec = (time_t) (u / USEC_PER_SEC); | |
105 | ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); | |
106 | ||
107 | return ts; | |
108 | } | |
109 | ||
110 | usec_t timeval_load(const struct timeval *tv) { | |
111 | assert(tv); | |
112 | ||
113 | return | |
114 | (usec_t) tv->tv_sec * USEC_PER_SEC + | |
115 | (usec_t) tv->tv_usec; | |
116 | } | |
117 | ||
118 | struct timeval *timeval_store(struct timeval *tv, usec_t u) { | |
119 | assert(tv); | |
120 | ||
121 | tv->tv_sec = (time_t) (u / USEC_PER_SEC); | |
122 | tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); | |
123 | ||
124 | return tv; | |
125 | } | |
126 | ||
127 | bool endswith(const char *s, const char *postfix) { | |
128 | size_t sl, pl; | |
129 | ||
130 | assert(s); | |
131 | assert(postfix); | |
132 | ||
133 | sl = strlen(s); | |
134 | pl = strlen(postfix); | |
135 | ||
d4d0d4db LP |
136 | if (pl == 0) |
137 | return true; | |
138 | ||
60918275 LP |
139 | if (sl < pl) |
140 | return false; | |
141 | ||
142 | return memcmp(s + sl - pl, postfix, pl) == 0; | |
143 | } | |
144 | ||
145 | bool startswith(const char *s, const char *prefix) { | |
146 | size_t sl, pl; | |
147 | ||
148 | assert(s); | |
149 | assert(prefix); | |
150 | ||
151 | sl = strlen(s); | |
152 | pl = strlen(prefix); | |
153 | ||
d4d0d4db LP |
154 | if (pl == 0) |
155 | return true; | |
156 | ||
60918275 LP |
157 | if (sl < pl) |
158 | return false; | |
159 | ||
160 | return memcmp(s, prefix, pl) == 0; | |
161 | } | |
162 | ||
3177a7fa MAP |
163 | bool startswith_no_case(const char *s, const char *prefix) { |
164 | size_t sl, pl; | |
165 | unsigned i; | |
166 | ||
167 | assert(s); | |
168 | assert(prefix); | |
169 | ||
170 | sl = strlen(s); | |
171 | pl = strlen(prefix); | |
172 | ||
173 | if (pl == 0) | |
174 | return true; | |
175 | ||
176 | if (sl < pl) | |
177 | return false; | |
178 | ||
179 | for(i = 0; i < pl; ++i) { | |
180 | if (tolower(s[i]) != tolower(prefix[i])) | |
181 | return false; | |
182 | } | |
183 | ||
184 | return true; | |
185 | } | |
186 | ||
79d6d816 LP |
187 | bool first_word(const char *s, const char *word) { |
188 | size_t sl, wl; | |
189 | ||
190 | assert(s); | |
191 | assert(word); | |
192 | ||
193 | sl = strlen(s); | |
194 | wl = strlen(word); | |
195 | ||
196 | if (sl < wl) | |
197 | return false; | |
198 | ||
d4d0d4db LP |
199 | if (wl == 0) |
200 | return true; | |
201 | ||
79d6d816 LP |
202 | if (memcmp(s, word, wl) != 0) |
203 | return false; | |
204 | ||
d4d0d4db LP |
205 | return s[wl] == 0 || |
206 | strchr(WHITESPACE, s[wl]); | |
79d6d816 LP |
207 | } |
208 | ||
42f4e3c4 | 209 | int close_nointr(int fd) { |
60918275 LP |
210 | assert(fd >= 0); |
211 | ||
212 | for (;;) { | |
213 | int r; | |
214 | ||
215 | if ((r = close(fd)) >= 0) | |
216 | return r; | |
217 | ||
218 | if (errno != EINTR) | |
219 | return r; | |
220 | } | |
221 | } | |
85261803 | 222 | |
85f136b5 | 223 | void close_nointr_nofail(int fd) { |
80876c20 | 224 | int saved_errno = errno; |
85f136b5 LP |
225 | |
226 | /* like close_nointr() but cannot fail, and guarantees errno | |
227 | * is unchanged */ | |
228 | ||
229 | assert_se(close_nointr(fd) == 0); | |
80876c20 LP |
230 | |
231 | errno = saved_errno; | |
85f136b5 LP |
232 | } |
233 | ||
5b6319dc LP |
234 | void close_many(const int fds[], unsigned n_fd) { |
235 | unsigned i; | |
236 | ||
237 | for (i = 0; i < n_fd; i++) | |
238 | close_nointr_nofail(fds[i]); | |
239 | } | |
240 | ||
85261803 LP |
241 | int parse_boolean(const char *v) { |
242 | assert(v); | |
243 | ||
44d8db9e | 244 | if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on")) |
85261803 | 245 | return 1; |
44d8db9e | 246 | else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off")) |
85261803 LP |
247 | return 0; |
248 | ||
249 | return -EINVAL; | |
250 | } | |
251 | ||
3ba686c1 LP |
252 | int parse_pid(const char *s, pid_t* ret_pid) { |
253 | unsigned long ul; | |
254 | pid_t pid; | |
255 | int r; | |
256 | ||
257 | assert(s); | |
258 | assert(ret_pid); | |
259 | ||
260 | if ((r = safe_atolu(s, &ul)) < 0) | |
261 | return r; | |
262 | ||
263 | pid = (pid_t) ul; | |
264 | ||
265 | if ((unsigned long) pid != ul) | |
266 | return -ERANGE; | |
267 | ||
268 | if (pid <= 0) | |
269 | return -ERANGE; | |
270 | ||
271 | *ret_pid = pid; | |
272 | return 0; | |
273 | } | |
274 | ||
85261803 LP |
275 | int safe_atou(const char *s, unsigned *ret_u) { |
276 | char *x = NULL; | |
034c6ed7 | 277 | unsigned long l; |
85261803 LP |
278 | |
279 | assert(s); | |
280 | assert(ret_u); | |
281 | ||
282 | errno = 0; | |
283 | l = strtoul(s, &x, 0); | |
284 | ||
285 | if (!x || *x || errno) | |
286 | return errno ? -errno : -EINVAL; | |
287 | ||
034c6ed7 | 288 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
289 | return -ERANGE; |
290 | ||
291 | *ret_u = (unsigned) l; | |
292 | return 0; | |
293 | } | |
294 | ||
295 | int safe_atoi(const char *s, int *ret_i) { | |
296 | char *x = NULL; | |
034c6ed7 | 297 | long l; |
85261803 LP |
298 | |
299 | assert(s); | |
300 | assert(ret_i); | |
301 | ||
302 | errno = 0; | |
303 | l = strtol(s, &x, 0); | |
304 | ||
305 | if (!x || *x || errno) | |
306 | return errno ? -errno : -EINVAL; | |
307 | ||
034c6ed7 | 308 | if ((long) (int) l != l) |
85261803 LP |
309 | return -ERANGE; |
310 | ||
034c6ed7 LP |
311 | *ret_i = (int) l; |
312 | return 0; | |
313 | } | |
314 | ||
034c6ed7 LP |
315 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
316 | char *x = NULL; | |
317 | unsigned long long l; | |
318 | ||
319 | assert(s); | |
320 | assert(ret_llu); | |
321 | ||
322 | errno = 0; | |
323 | l = strtoull(s, &x, 0); | |
324 | ||
325 | if (!x || *x || errno) | |
326 | return errno ? -errno : -EINVAL; | |
327 | ||
328 | *ret_llu = l; | |
329 | return 0; | |
330 | } | |
331 | ||
332 | int safe_atolli(const char *s, long long int *ret_lli) { | |
333 | char *x = NULL; | |
334 | long long l; | |
335 | ||
336 | assert(s); | |
337 | assert(ret_lli); | |
338 | ||
339 | errno = 0; | |
340 | l = strtoll(s, &x, 0); | |
341 | ||
342 | if (!x || *x || errno) | |
343 | return errno ? -errno : -EINVAL; | |
344 | ||
345 | *ret_lli = l; | |
85261803 LP |
346 | return 0; |
347 | } | |
a41e8209 | 348 | |
a41e8209 | 349 | /* Split a string into words. */ |
65d2ebdc | 350 | char *split(const char *c, size_t *l, const char *separator, char **state) { |
a41e8209 LP |
351 | char *current; |
352 | ||
353 | current = *state ? *state : (char*) c; | |
354 | ||
355 | if (!*current || *c == 0) | |
356 | return NULL; | |
357 | ||
65d2ebdc LP |
358 | current += strspn(current, separator); |
359 | *l = strcspn(current, separator); | |
82919e3d LP |
360 | *state = current+*l; |
361 | ||
362 | return (char*) current; | |
363 | } | |
364 | ||
034c6ed7 LP |
365 | /* Split a string into words, but consider strings enclosed in '' and |
366 | * "" as words even if they include spaces. */ | |
367 | char *split_quoted(const char *c, size_t *l, char **state) { | |
0bab36f2 LP |
368 | char *current, *e; |
369 | bool escaped = false; | |
034c6ed7 LP |
370 | |
371 | current = *state ? *state : (char*) c; | |
372 | ||
373 | if (!*current || *c == 0) | |
374 | return NULL; | |
375 | ||
376 | current += strspn(current, WHITESPACE); | |
377 | ||
378 | if (*current == '\'') { | |
379 | current ++; | |
034c6ed7 | 380 | |
0bab36f2 LP |
381 | for (e = current; *e; e++) { |
382 | if (escaped) | |
383 | escaped = false; | |
384 | else if (*e == '\\') | |
385 | escaped = true; | |
386 | else if (*e == '\'') | |
387 | break; | |
388 | } | |
389 | ||
390 | *l = e-current; | |
391 | *state = *e == 0 ? e : e+1; | |
034c6ed7 LP |
392 | } else if (*current == '\"') { |
393 | current ++; | |
034c6ed7 | 394 | |
0bab36f2 LP |
395 | for (e = current; *e; e++) { |
396 | if (escaped) | |
397 | escaped = false; | |
398 | else if (*e == '\\') | |
399 | escaped = true; | |
400 | else if (*e == '\"') | |
401 | break; | |
402 | } | |
403 | ||
404 | *l = e-current; | |
405 | *state = *e == 0 ? e : e+1; | |
034c6ed7 | 406 | } else { |
0bab36f2 LP |
407 | for (e = current; *e; e++) { |
408 | if (escaped) | |
409 | escaped = false; | |
410 | else if (*e == '\\') | |
411 | escaped = true; | |
412 | else if (strchr(WHITESPACE, *e)) | |
413 | break; | |
414 | } | |
415 | *l = e-current; | |
416 | *state = e; | |
034c6ed7 LP |
417 | } |
418 | ||
419 | return (char*) current; | |
420 | } | |
421 | ||
65d2ebdc LP |
422 | char **split_path_and_make_absolute(const char *p) { |
423 | char **l; | |
424 | assert(p); | |
425 | ||
426 | if (!(l = strv_split(p, ":"))) | |
427 | return NULL; | |
428 | ||
429 | if (!strv_path_make_absolute_cwd(l)) { | |
430 | strv_free(l); | |
431 | return NULL; | |
432 | } | |
433 | ||
434 | return l; | |
435 | } | |
436 | ||
034c6ed7 LP |
437 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
438 | int r; | |
439 | FILE *f; | |
440 | char fn[132], line[256], *p; | |
bb00e604 | 441 | long unsigned ppid; |
034c6ed7 LP |
442 | |
443 | assert(pid >= 0); | |
444 | assert(_ppid); | |
445 | ||
bb00e604 | 446 | assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1)); |
034c6ed7 LP |
447 | fn[sizeof(fn)-1] = 0; |
448 | ||
449 | if (!(f = fopen(fn, "r"))) | |
450 | return -errno; | |
451 | ||
452 | if (!(fgets(line, sizeof(line), f))) { | |
453 | r = -errno; | |
454 | fclose(f); | |
455 | return r; | |
456 | } | |
457 | ||
458 | fclose(f); | |
459 | ||
460 | /* Let's skip the pid and comm fields. The latter is enclosed | |
461 | * in () but does not escape any () in its value, so let's | |
462 | * skip over it manually */ | |
463 | ||
464 | if (!(p = strrchr(line, ')'))) | |
465 | return -EIO; | |
466 | ||
467 | p++; | |
468 | ||
469 | if (sscanf(p, " " | |
470 | "%*c " /* state */ | |
bb00e604 | 471 | "%lu ", /* ppid */ |
034c6ed7 LP |
472 | &ppid) != 1) |
473 | return -EIO; | |
474 | ||
bb00e604 | 475 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
476 | return -ERANGE; |
477 | ||
478 | *_ppid = (pid_t) ppid; | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
483 | int write_one_line_file(const char *fn, const char *line) { | |
484 | FILE *f; | |
485 | int r; | |
486 | ||
487 | assert(fn); | |
488 | assert(line); | |
489 | ||
490 | if (!(f = fopen(fn, "we"))) | |
491 | return -errno; | |
492 | ||
493 | if (fputs(line, f) < 0) { | |
494 | r = -errno; | |
495 | goto finish; | |
496 | } | |
497 | ||
498 | r = 0; | |
499 | finish: | |
500 | fclose(f); | |
501 | return r; | |
502 | } | |
503 | ||
504 | int read_one_line_file(const char *fn, char **line) { | |
505 | FILE *f; | |
506 | int r; | |
11316633 | 507 | char t[2048], *c; |
034c6ed7 LP |
508 | |
509 | assert(fn); | |
510 | assert(line); | |
511 | ||
512 | if (!(f = fopen(fn, "re"))) | |
513 | return -errno; | |
514 | ||
515 | if (!(fgets(t, sizeof(t), f))) { | |
516 | r = -errno; | |
517 | goto finish; | |
518 | } | |
519 | ||
520 | if (!(c = strdup(t))) { | |
521 | r = -ENOMEM; | |
522 | goto finish; | |
523 | } | |
524 | ||
525 | *line = c; | |
526 | r = 0; | |
527 | ||
528 | finish: | |
529 | fclose(f); | |
530 | return r; | |
531 | } | |
44d8db9e | 532 | |
7072ced8 LP |
533 | char *truncate_nl(char *s) { |
534 | assert(s); | |
535 | ||
536 | s[strcspn(s, NEWLINE)] = 0; | |
537 | return s; | |
538 | } | |
539 | ||
540 | int get_process_name(pid_t pid, char **name) { | |
541 | char *p; | |
542 | int r; | |
543 | ||
544 | assert(pid >= 1); | |
545 | assert(name); | |
546 | ||
bb00e604 | 547 | if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0) |
7072ced8 LP |
548 | return -ENOMEM; |
549 | ||
550 | r = read_one_line_file(p, name); | |
551 | free(p); | |
552 | ||
553 | if (r < 0) | |
554 | return r; | |
555 | ||
556 | truncate_nl(*name); | |
557 | return 0; | |
558 | } | |
559 | ||
c59760ee LP |
560 | int get_process_cmdline(pid_t pid, size_t max_length, char **line) { |
561 | char *p, *r, *k; | |
562 | int c; | |
563 | bool space = false; | |
564 | size_t left; | |
565 | FILE *f; | |
566 | ||
567 | assert(pid >= 1); | |
568 | assert(max_length > 0); | |
569 | assert(line); | |
570 | ||
571 | if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0) | |
572 | return -ENOMEM; | |
573 | ||
574 | f = fopen(p, "r"); | |
575 | free(p); | |
576 | ||
577 | if (!f) | |
578 | return -errno; | |
579 | ||
580 | if (!(r = new(char, max_length))) { | |
581 | fclose(f); | |
582 | return -ENOMEM; | |
583 | } | |
584 | ||
585 | k = r; | |
586 | left = max_length; | |
587 | while ((c = getc(f)) != EOF) { | |
588 | ||
589 | if (isprint(c)) { | |
590 | if (space) { | |
591 | if (left <= 4) | |
592 | break; | |
593 | ||
594 | *(k++) = ' '; | |
057fbb58 | 595 | left--; |
c59760ee LP |
596 | space = false; |
597 | } | |
598 | ||
599 | if (left <= 4) | |
600 | break; | |
601 | ||
602 | *(k++) = (char) c; | |
057fbb58 | 603 | left--; |
c59760ee LP |
604 | } else |
605 | space = true; | |
606 | } | |
607 | ||
608 | if (left <= 4) { | |
609 | size_t n = MIN(left-1, 3U); | |
610 | memcpy(k, "...", n); | |
611 | k[n] = 0; | |
612 | } else | |
613 | *k = 0; | |
614 | ||
615 | fclose(f); | |
616 | ||
35d2e7ec LP |
617 | /* Kernel threads have no argv[] */ |
618 | if (r[0] == 0) { | |
619 | char *t; | |
620 | int h; | |
621 | ||
622 | free(r); | |
623 | ||
624 | if ((h = get_process_name(pid, &t)) < 0) | |
625 | return h; | |
626 | ||
627 | h = asprintf(&r, "[%s]", t); | |
628 | free(t); | |
629 | ||
630 | if (h < 0) | |
631 | return -ENOMEM; | |
632 | } | |
fa776d8e | 633 | |
c59760ee LP |
634 | *line = r; |
635 | return 0; | |
636 | } | |
637 | ||
fab56fc5 LP |
638 | char *strnappend(const char *s, const char *suffix, size_t b) { |
639 | size_t a; | |
44d8db9e LP |
640 | char *r; |
641 | ||
fab56fc5 LP |
642 | if (!s && !suffix) |
643 | return strdup(""); | |
644 | ||
645 | if (!s) | |
646 | return strndup(suffix, b); | |
647 | ||
648 | if (!suffix) | |
649 | return strdup(s); | |
650 | ||
44d8db9e LP |
651 | assert(s); |
652 | assert(suffix); | |
653 | ||
654 | a = strlen(s); | |
44d8db9e LP |
655 | |
656 | if (!(r = new(char, a+b+1))) | |
657 | return NULL; | |
658 | ||
659 | memcpy(r, s, a); | |
660 | memcpy(r+a, suffix, b); | |
661 | r[a+b] = 0; | |
662 | ||
663 | return r; | |
664 | } | |
87f0e418 | 665 | |
fab56fc5 LP |
666 | char *strappend(const char *s, const char *suffix) { |
667 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
668 | } | |
669 | ||
87f0e418 LP |
670 | int readlink_malloc(const char *p, char **r) { |
671 | size_t l = 100; | |
672 | ||
673 | assert(p); | |
674 | assert(r); | |
675 | ||
676 | for (;;) { | |
677 | char *c; | |
678 | ssize_t n; | |
679 | ||
680 | if (!(c = new(char, l))) | |
681 | return -ENOMEM; | |
682 | ||
683 | if ((n = readlink(p, c, l-1)) < 0) { | |
684 | int ret = -errno; | |
685 | free(c); | |
686 | return ret; | |
687 | } | |
688 | ||
689 | if ((size_t) n < l-1) { | |
690 | c[n] = 0; | |
691 | *r = c; | |
692 | return 0; | |
693 | } | |
694 | ||
695 | free(c); | |
696 | l *= 2; | |
697 | } | |
698 | } | |
699 | ||
2c7108c4 LP |
700 | int readlink_and_make_absolute(const char *p, char **r) { |
701 | char *target, *k; | |
702 | int j; | |
703 | ||
704 | assert(p); | |
705 | assert(r); | |
706 | ||
707 | if ((j = readlink_malloc(p, &target)) < 0) | |
708 | return j; | |
709 | ||
710 | k = file_in_same_dir(p, target); | |
711 | free(target); | |
712 | ||
713 | if (!k) | |
714 | return -ENOMEM; | |
715 | ||
716 | *r = k; | |
717 | return 0; | |
718 | } | |
719 | ||
35d2e7ec LP |
720 | int parent_of_path(const char *path, char **_r) { |
721 | const char *e, *a = NULL, *b = NULL, *p; | |
722 | char *r; | |
723 | bool slash = false; | |
724 | ||
725 | assert(path); | |
726 | assert(_r); | |
727 | ||
728 | if (!*path) | |
729 | return -EINVAL; | |
730 | ||
731 | for (e = path; *e; e++) { | |
732 | ||
733 | if (!slash && *e == '/') { | |
734 | a = b; | |
735 | b = e; | |
736 | slash = true; | |
737 | } else if (slash && *e != '/') | |
738 | slash = false; | |
739 | } | |
740 | ||
741 | if (*(e-1) == '/') | |
742 | p = a; | |
743 | else | |
744 | p = b; | |
745 | ||
746 | if (!p) | |
747 | return -EINVAL; | |
748 | ||
749 | if (p == path) | |
750 | r = strdup("/"); | |
751 | else | |
752 | r = strndup(path, p-path); | |
753 | ||
754 | if (!r) | |
755 | return -ENOMEM; | |
756 | ||
757 | *_r = r; | |
758 | return 0; | |
759 | } | |
760 | ||
761 | ||
87f0e418 LP |
762 | char *file_name_from_path(const char *p) { |
763 | char *r; | |
764 | ||
765 | assert(p); | |
766 | ||
767 | if ((r = strrchr(p, '/'))) | |
768 | return r + 1; | |
769 | ||
770 | return (char*) p; | |
771 | } | |
0301abf4 LP |
772 | |
773 | bool path_is_absolute(const char *p) { | |
774 | assert(p); | |
775 | ||
776 | return p[0] == '/'; | |
777 | } | |
778 | ||
779 | bool is_path(const char *p) { | |
780 | ||
781 | return !!strchr(p, '/'); | |
782 | } | |
783 | ||
784 | char *path_make_absolute(const char *p, const char *prefix) { | |
785 | char *r; | |
786 | ||
787 | assert(p); | |
788 | ||
65d2ebdc LP |
789 | /* Makes every item in the list an absolute path by prepending |
790 | * the prefix, if specified and necessary */ | |
791 | ||
0301abf4 LP |
792 | if (path_is_absolute(p) || !prefix) |
793 | return strdup(p); | |
794 | ||
795 | if (asprintf(&r, "%s/%s", prefix, p) < 0) | |
796 | return NULL; | |
797 | ||
798 | return r; | |
799 | } | |
2a987ee8 | 800 | |
65d2ebdc LP |
801 | char *path_make_absolute_cwd(const char *p) { |
802 | char *cwd, *r; | |
803 | ||
804 | assert(p); | |
805 | ||
806 | /* Similar to path_make_absolute(), but prefixes with the | |
807 | * current working directory. */ | |
808 | ||
809 | if (path_is_absolute(p)) | |
810 | return strdup(p); | |
811 | ||
812 | if (!(cwd = get_current_dir_name())) | |
813 | return NULL; | |
814 | ||
815 | r = path_make_absolute(p, cwd); | |
816 | free(cwd); | |
817 | ||
818 | return r; | |
819 | } | |
820 | ||
821 | char **strv_path_make_absolute_cwd(char **l) { | |
822 | char **s; | |
823 | ||
824 | /* Goes through every item in the string list and makes it | |
825 | * absolute. This works in place and won't rollback any | |
826 | * changes on failure. */ | |
827 | ||
828 | STRV_FOREACH(s, l) { | |
829 | char *t; | |
830 | ||
831 | if (!(t = path_make_absolute_cwd(*s))) | |
832 | return NULL; | |
833 | ||
834 | free(*s); | |
835 | *s = t; | |
836 | } | |
837 | ||
838 | return l; | |
839 | } | |
840 | ||
c3f6d675 LP |
841 | char **strv_path_canonicalize(char **l) { |
842 | char **s; | |
843 | unsigned k = 0; | |
844 | bool enomem = false; | |
845 | ||
846 | if (strv_isempty(l)) | |
847 | return l; | |
848 | ||
849 | /* Goes through every item in the string list and canonicalize | |
850 | * the path. This works in place and won't rollback any | |
851 | * changes on failure. */ | |
852 | ||
853 | STRV_FOREACH(s, l) { | |
854 | char *t, *u; | |
855 | ||
856 | t = path_make_absolute_cwd(*s); | |
857 | free(*s); | |
858 | ||
859 | if (!t) { | |
860 | enomem = true; | |
861 | continue; | |
862 | } | |
863 | ||
864 | errno = 0; | |
865 | u = canonicalize_file_name(t); | |
866 | free(t); | |
867 | ||
868 | if (!u) { | |
869 | if (errno == ENOMEM || !errno) | |
870 | enomem = true; | |
871 | ||
872 | continue; | |
873 | } | |
874 | ||
875 | l[k++] = u; | |
876 | } | |
877 | ||
878 | l[k] = NULL; | |
879 | ||
880 | if (enomem) | |
881 | return NULL; | |
882 | ||
883 | return l; | |
884 | } | |
885 | ||
2a987ee8 LP |
886 | int reset_all_signal_handlers(void) { |
887 | int sig; | |
888 | ||
889 | for (sig = 1; sig < _NSIG; sig++) { | |
890 | struct sigaction sa; | |
891 | ||
892 | if (sig == SIGKILL || sig == SIGSTOP) | |
893 | continue; | |
894 | ||
895 | zero(sa); | |
896 | sa.sa_handler = SIG_DFL; | |
431c32bf | 897 | sa.sa_flags = SA_RESTART; |
2a987ee8 LP |
898 | |
899 | /* On Linux the first two RT signals are reserved by | |
900 | * glibc, and sigaction() will return EINVAL for them. */ | |
901 | if ((sigaction(sig, &sa, NULL) < 0)) | |
902 | if (errno != EINVAL) | |
903 | return -errno; | |
904 | } | |
905 | ||
8e274523 | 906 | return 0; |
2a987ee8 | 907 | } |
4a72ff34 LP |
908 | |
909 | char *strstrip(char *s) { | |
910 | char *e, *l = NULL; | |
911 | ||
912 | /* Drops trailing whitespace. Modifies the string in | |
913 | * place. Returns pointer to first non-space character */ | |
914 | ||
915 | s += strspn(s, WHITESPACE); | |
916 | ||
917 | for (e = s; *e; e++) | |
918 | if (!strchr(WHITESPACE, *e)) | |
919 | l = e; | |
920 | ||
921 | if (l) | |
922 | *(l+1) = 0; | |
923 | else | |
924 | *s = 0; | |
925 | ||
926 | return s; | |
4a72ff34 LP |
927 | } |
928 | ||
ee9b5e01 LP |
929 | char *delete_chars(char *s, const char *bad) { |
930 | char *f, *t; | |
931 | ||
932 | /* Drops all whitespace, regardless where in the string */ | |
933 | ||
934 | for (f = s, t = s; *f; f++) { | |
935 | if (strchr(bad, *f)) | |
936 | continue; | |
937 | ||
938 | *(t++) = *f; | |
939 | } | |
940 | ||
941 | *t = 0; | |
942 | ||
943 | return s; | |
944 | } | |
945 | ||
4a72ff34 LP |
946 | char *file_in_same_dir(const char *path, const char *filename) { |
947 | char *e, *r; | |
948 | size_t k; | |
949 | ||
950 | assert(path); | |
951 | assert(filename); | |
952 | ||
953 | /* This removes the last component of path and appends | |
954 | * filename, unless the latter is absolute anyway or the | |
955 | * former isn't */ | |
956 | ||
957 | if (path_is_absolute(filename)) | |
958 | return strdup(filename); | |
959 | ||
960 | if (!(e = strrchr(path, '/'))) | |
961 | return strdup(filename); | |
962 | ||
963 | k = strlen(filename); | |
964 | if (!(r = new(char, e-path+1+k+1))) | |
965 | return NULL; | |
966 | ||
967 | memcpy(r, path, e-path+1); | |
968 | memcpy(r+(e-path)+1, filename, k+1); | |
969 | ||
970 | return r; | |
971 | } | |
fb624d04 | 972 | |
8c6db833 LP |
973 | int safe_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
974 | struct stat st; | |
975 | ||
56cf987f | 976 | if (label_mkdir(path, mode) >= 0) |
8c6db833 LP |
977 | if (chmod_and_chown(path, mode, uid, gid) < 0) |
978 | return -errno; | |
979 | ||
980 | if (lstat(path, &st) < 0) | |
981 | return -errno; | |
982 | ||
983 | if ((st.st_mode & 0777) != mode || | |
984 | st.st_uid != uid || | |
985 | st.st_gid != gid || | |
986 | !S_ISDIR(st.st_mode)) { | |
987 | errno = EEXIST; | |
988 | return -errno; | |
989 | } | |
990 | ||
991 | return 0; | |
992 | } | |
993 | ||
994 | ||
a9f5d454 LP |
995 | int mkdir_parents(const char *path, mode_t mode) { |
996 | const char *p, *e; | |
997 | ||
998 | assert(path); | |
999 | ||
1000 | /* Creates every parent directory in the path except the last | |
1001 | * component. */ | |
1002 | ||
1003 | p = path + strspn(path, "/"); | |
1004 | for (;;) { | |
1005 | int r; | |
1006 | char *t; | |
1007 | ||
1008 | e = p + strcspn(p, "/"); | |
1009 | p = e + strspn(e, "/"); | |
1010 | ||
1011 | /* Is this the last component? If so, then we're | |
1012 | * done */ | |
1013 | if (*p == 0) | |
1014 | return 0; | |
1015 | ||
1016 | if (!(t = strndup(path, e - path))) | |
1017 | return -ENOMEM; | |
1018 | ||
56cf987f | 1019 | r = label_mkdir(t, mode); |
a9f5d454 LP |
1020 | free(t); |
1021 | ||
1022 | if (r < 0 && errno != EEXIST) | |
1023 | return -errno; | |
1024 | } | |
1025 | } | |
1026 | ||
bbd67135 LP |
1027 | int mkdir_p(const char *path, mode_t mode) { |
1028 | int r; | |
1029 | ||
1030 | /* Like mkdir -p */ | |
1031 | ||
1032 | if ((r = mkdir_parents(path, mode)) < 0) | |
1033 | return r; | |
1034 | ||
56cf987f | 1035 | if (label_mkdir(path, mode) < 0 && errno != EEXIST) |
bbd67135 LP |
1036 | return -errno; |
1037 | ||
1038 | return 0; | |
1039 | } | |
1040 | ||
c32dd69b LP |
1041 | int rmdir_parents(const char *path, const char *stop) { |
1042 | size_t l; | |
1043 | int r = 0; | |
1044 | ||
1045 | assert(path); | |
1046 | assert(stop); | |
1047 | ||
1048 | l = strlen(path); | |
1049 | ||
1050 | /* Skip trailing slashes */ | |
1051 | while (l > 0 && path[l-1] == '/') | |
1052 | l--; | |
1053 | ||
1054 | while (l > 0) { | |
1055 | char *t; | |
1056 | ||
1057 | /* Skip last component */ | |
1058 | while (l > 0 && path[l-1] != '/') | |
1059 | l--; | |
1060 | ||
1061 | /* Skip trailing slashes */ | |
1062 | while (l > 0 && path[l-1] == '/') | |
1063 | l--; | |
1064 | ||
1065 | if (l <= 0) | |
1066 | break; | |
1067 | ||
1068 | if (!(t = strndup(path, l))) | |
1069 | return -ENOMEM; | |
1070 | ||
1071 | if (path_startswith(stop, t)) { | |
1072 | free(t); | |
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | r = rmdir(t); | |
1077 | free(t); | |
1078 | ||
1079 | if (r < 0) | |
1080 | if (errno != ENOENT) | |
1081 | return -errno; | |
1082 | } | |
1083 | ||
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | ||
fb624d04 LP |
1088 | char hexchar(int x) { |
1089 | static const char table[16] = "0123456789abcdef"; | |
1090 | ||
1091 | return table[x & 15]; | |
1092 | } | |
4fe88d28 LP |
1093 | |
1094 | int unhexchar(char c) { | |
1095 | ||
1096 | if (c >= '0' && c <= '9') | |
1097 | return c - '0'; | |
1098 | ||
1099 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1100 | return c - 'a' + 10; |
4fe88d28 LP |
1101 | |
1102 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1103 | return c - 'A' + 10; |
4fe88d28 LP |
1104 | |
1105 | return -1; | |
1106 | } | |
1107 | ||
1108 | char octchar(int x) { | |
1109 | return '0' + (x & 7); | |
1110 | } | |
1111 | ||
1112 | int unoctchar(char c) { | |
1113 | ||
1114 | if (c >= '0' && c <= '7') | |
1115 | return c - '0'; | |
1116 | ||
1117 | return -1; | |
1118 | } | |
1119 | ||
5af98f82 LP |
1120 | char decchar(int x) { |
1121 | return '0' + (x % 10); | |
1122 | } | |
1123 | ||
1124 | int undecchar(char c) { | |
1125 | ||
1126 | if (c >= '0' && c <= '9') | |
1127 | return c - '0'; | |
1128 | ||
1129 | return -1; | |
1130 | } | |
1131 | ||
4fe88d28 LP |
1132 | char *cescape(const char *s) { |
1133 | char *r, *t; | |
1134 | const char *f; | |
1135 | ||
1136 | assert(s); | |
1137 | ||
1138 | /* Does C style string escaping. */ | |
1139 | ||
1140 | if (!(r = new(char, strlen(s)*4 + 1))) | |
1141 | return NULL; | |
1142 | ||
1143 | for (f = s, t = r; *f; f++) | |
1144 | ||
1145 | switch (*f) { | |
1146 | ||
1147 | case '\a': | |
1148 | *(t++) = '\\'; | |
1149 | *(t++) = 'a'; | |
1150 | break; | |
1151 | case '\b': | |
1152 | *(t++) = '\\'; | |
1153 | *(t++) = 'b'; | |
1154 | break; | |
1155 | case '\f': | |
1156 | *(t++) = '\\'; | |
1157 | *(t++) = 'f'; | |
1158 | break; | |
1159 | case '\n': | |
1160 | *(t++) = '\\'; | |
1161 | *(t++) = 'n'; | |
1162 | break; | |
1163 | case '\r': | |
1164 | *(t++) = '\\'; | |
1165 | *(t++) = 'r'; | |
1166 | break; | |
1167 | case '\t': | |
1168 | *(t++) = '\\'; | |
1169 | *(t++) = 't'; | |
1170 | break; | |
1171 | case '\v': | |
1172 | *(t++) = '\\'; | |
1173 | *(t++) = 'v'; | |
1174 | break; | |
1175 | case '\\': | |
1176 | *(t++) = '\\'; | |
1177 | *(t++) = '\\'; | |
1178 | break; | |
1179 | case '"': | |
1180 | *(t++) = '\\'; | |
1181 | *(t++) = '"'; | |
1182 | break; | |
1183 | case '\'': | |
1184 | *(t++) = '\\'; | |
1185 | *(t++) = '\''; | |
1186 | break; | |
1187 | ||
1188 | default: | |
1189 | /* For special chars we prefer octal over | |
1190 | * hexadecimal encoding, simply because glib's | |
1191 | * g_strescape() does the same */ | |
1192 | if ((*f < ' ') || (*f >= 127)) { | |
1193 | *(t++) = '\\'; | |
1194 | *(t++) = octchar((unsigned char) *f >> 6); | |
1195 | *(t++) = octchar((unsigned char) *f >> 3); | |
1196 | *(t++) = octchar((unsigned char) *f); | |
1197 | } else | |
1198 | *(t++) = *f; | |
1199 | break; | |
1200 | } | |
1201 | ||
1202 | *t = 0; | |
1203 | ||
1204 | return r; | |
1205 | } | |
1206 | ||
6febfd0d | 1207 | char *cunescape_length(const char *s, size_t length) { |
4fe88d28 LP |
1208 | char *r, *t; |
1209 | const char *f; | |
1210 | ||
1211 | assert(s); | |
1212 | ||
1213 | /* Undoes C style string escaping */ | |
1214 | ||
6febfd0d | 1215 | if (!(r = new(char, length+1))) |
4fe88d28 LP |
1216 | return r; |
1217 | ||
6febfd0d | 1218 | for (f = s, t = r; f < s + length; f++) { |
4fe88d28 LP |
1219 | |
1220 | if (*f != '\\') { | |
1221 | *(t++) = *f; | |
1222 | continue; | |
1223 | } | |
1224 | ||
1225 | f++; | |
1226 | ||
1227 | switch (*f) { | |
1228 | ||
1229 | case 'a': | |
1230 | *(t++) = '\a'; | |
1231 | break; | |
1232 | case 'b': | |
1233 | *(t++) = '\b'; | |
1234 | break; | |
1235 | case 'f': | |
1236 | *(t++) = '\f'; | |
1237 | break; | |
1238 | case 'n': | |
1239 | *(t++) = '\n'; | |
1240 | break; | |
1241 | case 'r': | |
1242 | *(t++) = '\r'; | |
1243 | break; | |
1244 | case 't': | |
1245 | *(t++) = '\t'; | |
1246 | break; | |
1247 | case 'v': | |
1248 | *(t++) = '\v'; | |
1249 | break; | |
1250 | case '\\': | |
1251 | *(t++) = '\\'; | |
1252 | break; | |
1253 | case '"': | |
1254 | *(t++) = '"'; | |
1255 | break; | |
1256 | case '\'': | |
1257 | *(t++) = '\''; | |
1258 | break; | |
1259 | ||
e167fb86 LP |
1260 | case 's': |
1261 | /* This is an extension of the XDG syntax files */ | |
1262 | *(t++) = ' '; | |
1263 | break; | |
1264 | ||
4fe88d28 LP |
1265 | case 'x': { |
1266 | /* hexadecimal encoding */ | |
1267 | int a, b; | |
1268 | ||
1269 | if ((a = unhexchar(f[1])) < 0 || | |
1270 | (b = unhexchar(f[2])) < 0) { | |
1271 | /* Invalid escape code, let's take it literal then */ | |
1272 | *(t++) = '\\'; | |
1273 | *(t++) = 'x'; | |
1274 | } else { | |
1275 | *(t++) = (char) ((a << 4) | b); | |
1276 | f += 2; | |
1277 | } | |
1278 | ||
1279 | break; | |
1280 | } | |
1281 | ||
1282 | case '0': | |
1283 | case '1': | |
1284 | case '2': | |
1285 | case '3': | |
1286 | case '4': | |
1287 | case '5': | |
1288 | case '6': | |
1289 | case '7': { | |
1290 | /* octal encoding */ | |
1291 | int a, b, c; | |
1292 | ||
1293 | if ((a = unoctchar(f[0])) < 0 || | |
1294 | (b = unoctchar(f[1])) < 0 || | |
1295 | (c = unoctchar(f[2])) < 0) { | |
1296 | /* Invalid escape code, let's take it literal then */ | |
1297 | *(t++) = '\\'; | |
1298 | *(t++) = f[0]; | |
1299 | } else { | |
1300 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1301 | f += 2; | |
1302 | } | |
1303 | ||
1304 | break; | |
1305 | } | |
1306 | ||
1307 | case 0: | |
1308 | /* premature end of string.*/ | |
1309 | *(t++) = '\\'; | |
1310 | goto finish; | |
1311 | ||
1312 | default: | |
1313 | /* Invalid escape code, let's take it literal then */ | |
1314 | *(t++) = '\\'; | |
f3d4cc01 | 1315 | *(t++) = *f; |
4fe88d28 LP |
1316 | break; |
1317 | } | |
1318 | } | |
1319 | ||
1320 | finish: | |
1321 | *t = 0; | |
1322 | return r; | |
1323 | } | |
1324 | ||
6febfd0d LP |
1325 | char *cunescape(const char *s) { |
1326 | return cunescape_length(s, strlen(s)); | |
1327 | } | |
4fe88d28 LP |
1328 | |
1329 | char *xescape(const char *s, const char *bad) { | |
1330 | char *r, *t; | |
1331 | const char *f; | |
1332 | ||
1333 | /* Escapes all chars in bad, in addition to \ and all special | |
1334 | * chars, in \xFF style escaping. May be reversed with | |
1335 | * cunescape. */ | |
1336 | ||
1337 | if (!(r = new(char, strlen(s)*4+1))) | |
1338 | return NULL; | |
1339 | ||
1340 | for (f = s, t = r; *f; f++) { | |
1341 | ||
b866264a LP |
1342 | if ((*f < ' ') || (*f >= 127) || |
1343 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1344 | *(t++) = '\\'; |
1345 | *(t++) = 'x'; | |
1346 | *(t++) = hexchar(*f >> 4); | |
1347 | *(t++) = hexchar(*f); | |
1348 | } else | |
1349 | *(t++) = *f; | |
1350 | } | |
1351 | ||
1352 | *t = 0; | |
1353 | ||
1354 | return r; | |
1355 | } | |
1356 | ||
ea430986 | 1357 | char *bus_path_escape(const char *s) { |
ea430986 LP |
1358 | char *r, *t; |
1359 | const char *f; | |
1360 | ||
47be870b LP |
1361 | assert(s); |
1362 | ||
ea430986 LP |
1363 | /* Escapes all chars that D-Bus' object path cannot deal |
1364 | * with. Can be reverse with bus_path_unescape() */ | |
1365 | ||
1366 | if (!(r = new(char, strlen(s)*3+1))) | |
1367 | return NULL; | |
1368 | ||
1369 | for (f = s, t = r; *f; f++) { | |
1370 | ||
1371 | if (!(*f >= 'A' && *f <= 'Z') && | |
1372 | !(*f >= 'a' && *f <= 'z') && | |
1373 | !(*f >= '0' && *f <= '9')) { | |
1374 | *(t++) = '_'; | |
1375 | *(t++) = hexchar(*f >> 4); | |
1376 | *(t++) = hexchar(*f); | |
1377 | } else | |
1378 | *(t++) = *f; | |
1379 | } | |
1380 | ||
1381 | *t = 0; | |
1382 | ||
1383 | return r; | |
1384 | } | |
1385 | ||
9e2f7c11 | 1386 | char *bus_path_unescape(const char *f) { |
ea430986 | 1387 | char *r, *t; |
ea430986 | 1388 | |
9e2f7c11 | 1389 | assert(f); |
47be870b | 1390 | |
9e2f7c11 | 1391 | if (!(r = strdup(f))) |
ea430986 LP |
1392 | return NULL; |
1393 | ||
9e2f7c11 | 1394 | for (t = r; *f; f++) { |
ea430986 LP |
1395 | |
1396 | if (*f == '_') { | |
1397 | int a, b; | |
1398 | ||
1399 | if ((a = unhexchar(f[1])) < 0 || | |
1400 | (b = unhexchar(f[2])) < 0) { | |
1401 | /* Invalid escape code, let's take it literal then */ | |
1402 | *(t++) = '_'; | |
1403 | } else { | |
1404 | *(t++) = (char) ((a << 4) | b); | |
1405 | f += 2; | |
1406 | } | |
1407 | } else | |
1408 | *(t++) = *f; | |
1409 | } | |
1410 | ||
1411 | *t = 0; | |
1412 | ||
1413 | return r; | |
1414 | } | |
1415 | ||
4fe88d28 LP |
1416 | char *path_kill_slashes(char *path) { |
1417 | char *f, *t; | |
1418 | bool slash = false; | |
1419 | ||
1420 | /* Removes redundant inner and trailing slashes. Modifies the | |
1421 | * passed string in-place. | |
1422 | * | |
1423 | * ///foo///bar/ becomes /foo/bar | |
1424 | */ | |
1425 | ||
1426 | for (f = path, t = path; *f; f++) { | |
1427 | ||
1428 | if (*f == '/') { | |
1429 | slash = true; | |
1430 | continue; | |
1431 | } | |
1432 | ||
1433 | if (slash) { | |
1434 | slash = false; | |
1435 | *(t++) = '/'; | |
1436 | } | |
1437 | ||
1438 | *(t++) = *f; | |
1439 | } | |
1440 | ||
1441 | /* Special rule, if we are talking of the root directory, a | |
1442 | trailing slash is good */ | |
1443 | ||
1444 | if (t == path && slash) | |
1445 | *(t++) = '/'; | |
1446 | ||
1447 | *t = 0; | |
1448 | return path; | |
1449 | } | |
1450 | ||
1451 | bool path_startswith(const char *path, const char *prefix) { | |
1452 | assert(path); | |
1453 | assert(prefix); | |
1454 | ||
1455 | if ((path[0] == '/') != (prefix[0] == '/')) | |
1456 | return false; | |
1457 | ||
1458 | for (;;) { | |
1459 | size_t a, b; | |
1460 | ||
1461 | path += strspn(path, "/"); | |
1462 | prefix += strspn(prefix, "/"); | |
1463 | ||
1464 | if (*prefix == 0) | |
1465 | return true; | |
1466 | ||
1467 | if (*path == 0) | |
1468 | return false; | |
1469 | ||
1470 | a = strcspn(path, "/"); | |
1471 | b = strcspn(prefix, "/"); | |
1472 | ||
1473 | if (a != b) | |
1474 | return false; | |
1475 | ||
1476 | if (memcmp(path, prefix, a) != 0) | |
1477 | return false; | |
1478 | ||
1479 | path += a; | |
1480 | prefix += b; | |
1481 | } | |
1482 | } | |
1483 | ||
15ae422b LP |
1484 | bool path_equal(const char *a, const char *b) { |
1485 | assert(a); | |
1486 | assert(b); | |
1487 | ||
1488 | if ((a[0] == '/') != (b[0] == '/')) | |
1489 | return false; | |
1490 | ||
1491 | for (;;) { | |
1492 | size_t j, k; | |
1493 | ||
1494 | a += strspn(a, "/"); | |
1495 | b += strspn(b, "/"); | |
1496 | ||
1497 | if (*a == 0 && *b == 0) | |
1498 | return true; | |
1499 | ||
1500 | if (*a == 0 || *b == 0) | |
1501 | return false; | |
1502 | ||
1503 | j = strcspn(a, "/"); | |
1504 | k = strcspn(b, "/"); | |
1505 | ||
1506 | if (j != k) | |
1507 | return false; | |
1508 | ||
1509 | if (memcmp(a, b, j) != 0) | |
1510 | return false; | |
1511 | ||
1512 | a += j; | |
1513 | b += k; | |
1514 | } | |
1515 | } | |
1516 | ||
67d51650 | 1517 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1518 | char *p; |
1519 | ||
67d51650 | 1520 | assert(t); |
4fe88d28 | 1521 | |
67d51650 | 1522 | for (p = t; *p; p++) |
4fe88d28 LP |
1523 | if (*p >= 'A' && *p <= 'Z') |
1524 | *p = *p - 'A' + 'a'; | |
1525 | ||
67d51650 | 1526 | return t; |
4fe88d28 | 1527 | } |
1dccbe19 | 1528 | |
c85dc17b LP |
1529 | bool ignore_file(const char *filename) { |
1530 | assert(filename); | |
1531 | ||
1532 | return | |
1533 | filename[0] == '.' || | |
6c78be3c | 1534 | streq(filename, "lost+found") || |
c85dc17b LP |
1535 | endswith(filename, "~") || |
1536 | endswith(filename, ".rpmnew") || | |
1537 | endswith(filename, ".rpmsave") || | |
1538 | endswith(filename, ".rpmorig") || | |
1539 | endswith(filename, ".dpkg-old") || | |
1540 | endswith(filename, ".dpkg-new") || | |
1541 | endswith(filename, ".swp"); | |
1542 | } | |
1543 | ||
3a0ecb08 LP |
1544 | int fd_nonblock(int fd, bool nonblock) { |
1545 | int flags; | |
1546 | ||
1547 | assert(fd >= 0); | |
1548 | ||
1549 | if ((flags = fcntl(fd, F_GETFL, 0)) < 0) | |
1550 | return -errno; | |
1551 | ||
1552 | if (nonblock) | |
1553 | flags |= O_NONBLOCK; | |
1554 | else | |
1555 | flags &= ~O_NONBLOCK; | |
1556 | ||
1557 | if (fcntl(fd, F_SETFL, flags) < 0) | |
1558 | return -errno; | |
1559 | ||
1560 | return 0; | |
1561 | } | |
1562 | ||
1563 | int fd_cloexec(int fd, bool cloexec) { | |
1564 | int flags; | |
1565 | ||
1566 | assert(fd >= 0); | |
1567 | ||
1568 | if ((flags = fcntl(fd, F_GETFD, 0)) < 0) | |
1569 | return -errno; | |
1570 | ||
1571 | if (cloexec) | |
1572 | flags |= FD_CLOEXEC; | |
1573 | else | |
1574 | flags &= ~FD_CLOEXEC; | |
1575 | ||
1576 | if (fcntl(fd, F_SETFD, flags) < 0) | |
1577 | return -errno; | |
1578 | ||
1579 | return 0; | |
1580 | } | |
1581 | ||
a0d40ac5 LP |
1582 | int close_all_fds(const int except[], unsigned n_except) { |
1583 | DIR *d; | |
1584 | struct dirent *de; | |
1585 | int r = 0; | |
1586 | ||
1587 | if (!(d = opendir("/proc/self/fd"))) | |
1588 | return -errno; | |
1589 | ||
1590 | while ((de = readdir(d))) { | |
a7610064 | 1591 | int fd = -1; |
a0d40ac5 | 1592 | |
a16e1123 | 1593 | if (ignore_file(de->d_name)) |
a0d40ac5 LP |
1594 | continue; |
1595 | ||
1596 | if ((r = safe_atoi(de->d_name, &fd)) < 0) | |
1597 | goto finish; | |
1598 | ||
1599 | if (fd < 3) | |
1600 | continue; | |
1601 | ||
1602 | if (fd == dirfd(d)) | |
1603 | continue; | |
1604 | ||
1605 | if (except) { | |
1606 | bool found; | |
1607 | unsigned i; | |
1608 | ||
1609 | found = false; | |
1610 | for (i = 0; i < n_except; i++) | |
1611 | if (except[i] == fd) { | |
1612 | found = true; | |
1613 | break; | |
1614 | } | |
1615 | ||
1616 | if (found) | |
1617 | continue; | |
1618 | } | |
1619 | ||
2f357920 LP |
1620 | if ((r = close_nointr(fd)) < 0) { |
1621 | /* Valgrind has its own FD and doesn't want to have it closed */ | |
1622 | if (errno != EBADF) | |
1623 | goto finish; | |
1624 | } | |
a0d40ac5 LP |
1625 | } |
1626 | ||
2f357920 LP |
1627 | r = 0; |
1628 | ||
a0d40ac5 LP |
1629 | finish: |
1630 | closedir(d); | |
1631 | return r; | |
1632 | } | |
1633 | ||
db12775d LP |
1634 | bool chars_intersect(const char *a, const char *b) { |
1635 | const char *p; | |
1636 | ||
1637 | /* Returns true if any of the chars in a are in b. */ | |
1638 | for (p = a; *p; p++) | |
1639 | if (strchr(b, *p)) | |
1640 | return true; | |
1641 | ||
1642 | return false; | |
1643 | } | |
1644 | ||
8b6c7120 LP |
1645 | char *format_timestamp(char *buf, size_t l, usec_t t) { |
1646 | struct tm tm; | |
1647 | time_t sec; | |
1648 | ||
1649 | assert(buf); | |
1650 | assert(l > 0); | |
1651 | ||
1652 | if (t <= 0) | |
1653 | return NULL; | |
1654 | ||
f872ec33 | 1655 | sec = (time_t) (t / USEC_PER_SEC); |
8b6c7120 LP |
1656 | |
1657 | if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0) | |
1658 | return NULL; | |
1659 | ||
1660 | return buf; | |
1661 | } | |
1662 | ||
584be568 LP |
1663 | char *format_timestamp_pretty(char *buf, size_t l, usec_t t) { |
1664 | usec_t n, d; | |
1665 | ||
1666 | n = now(CLOCK_REALTIME); | |
1667 | ||
1668 | if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) | |
1669 | return NULL; | |
1670 | ||
1671 | d = n - t; | |
1672 | ||
1673 | if (d >= USEC_PER_YEAR) | |
1674 | snprintf(buf, l, "%llu years and %llu months ago", | |
1675 | (unsigned long long) (d / USEC_PER_YEAR), | |
1676 | (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); | |
1677 | else if (d >= USEC_PER_MONTH) | |
1678 | snprintf(buf, l, "%llu months and %llu days ago", | |
1679 | (unsigned long long) (d / USEC_PER_MONTH), | |
1680 | (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); | |
1681 | else if (d >= USEC_PER_WEEK) | |
1682 | snprintf(buf, l, "%llu weeks and %llu days ago", | |
1683 | (unsigned long long) (d / USEC_PER_WEEK), | |
1684 | (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); | |
1685 | else if (d >= 2*USEC_PER_DAY) | |
1686 | snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); | |
1687 | else if (d >= 25*USEC_PER_HOUR) | |
1688 | snprintf(buf, l, "1 day and %lluh ago", | |
1689 | (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); | |
1690 | else if (d >= 6*USEC_PER_HOUR) | |
1691 | snprintf(buf, l, "%lluh ago", | |
1692 | (unsigned long long) (d / USEC_PER_HOUR)); | |
1693 | else if (d >= USEC_PER_HOUR) | |
1694 | snprintf(buf, l, "%lluh %llumin ago", | |
1695 | (unsigned long long) (d / USEC_PER_HOUR), | |
1696 | (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); | |
1697 | else if (d >= 5*USEC_PER_MINUTE) | |
1698 | snprintf(buf, l, "%llumin ago", | |
1699 | (unsigned long long) (d / USEC_PER_MINUTE)); | |
1700 | else if (d >= USEC_PER_MINUTE) | |
1701 | snprintf(buf, l, "%llumin %llus ago", | |
1702 | (unsigned long long) (d / USEC_PER_MINUTE), | |
1703 | (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); | |
1704 | else if (d >= USEC_PER_SEC) | |
1705 | snprintf(buf, l, "%llus ago", | |
1706 | (unsigned long long) (d / USEC_PER_SEC)); | |
1707 | else if (d >= USEC_PER_MSEC) | |
1708 | snprintf(buf, l, "%llums ago", | |
1709 | (unsigned long long) (d / USEC_PER_MSEC)); | |
1710 | else if (d > 0) | |
1711 | snprintf(buf, l, "%lluus ago", | |
1712 | (unsigned long long) d); | |
1713 | else | |
1714 | snprintf(buf, l, "now"); | |
1715 | ||
1716 | buf[l-1] = 0; | |
1717 | return buf; | |
1718 | } | |
1719 | ||
871d7de4 LP |
1720 | char *format_timespan(char *buf, size_t l, usec_t t) { |
1721 | static const struct { | |
1722 | const char *suffix; | |
1723 | usec_t usec; | |
1724 | } table[] = { | |
1725 | { "w", USEC_PER_WEEK }, | |
1726 | { "d", USEC_PER_DAY }, | |
1727 | { "h", USEC_PER_HOUR }, | |
1728 | { "min", USEC_PER_MINUTE }, | |
1729 | { "s", USEC_PER_SEC }, | |
1730 | { "ms", USEC_PER_MSEC }, | |
1731 | { "us", 1 }, | |
1732 | }; | |
1733 | ||
1734 | unsigned i; | |
1735 | char *p = buf; | |
1736 | ||
1737 | assert(buf); | |
1738 | assert(l > 0); | |
1739 | ||
1740 | if (t == (usec_t) -1) | |
1741 | return NULL; | |
1742 | ||
4502d22c LP |
1743 | if (t == 0) { |
1744 | snprintf(p, l, "0"); | |
1745 | p[l-1] = 0; | |
1746 | return p; | |
1747 | } | |
1748 | ||
871d7de4 LP |
1749 | /* The result of this function can be parsed with parse_usec */ |
1750 | ||
1751 | for (i = 0; i < ELEMENTSOF(table); i++) { | |
1752 | int k; | |
1753 | size_t n; | |
1754 | ||
1755 | if (t < table[i].usec) | |
1756 | continue; | |
1757 | ||
1758 | if (l <= 1) | |
1759 | break; | |
1760 | ||
1761 | k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix); | |
1762 | n = MIN((size_t) k, l); | |
1763 | ||
1764 | l -= n; | |
1765 | p += n; | |
1766 | ||
1767 | t %= table[i].usec; | |
1768 | } | |
1769 | ||
1770 | *p = 0; | |
1771 | ||
1772 | return buf; | |
1773 | } | |
1774 | ||
42856c10 LP |
1775 | bool fstype_is_network(const char *fstype) { |
1776 | static const char * const table[] = { | |
1777 | "cifs", | |
1778 | "smbfs", | |
1779 | "ncpfs", | |
1780 | "nfs", | |
ca139f94 LP |
1781 | "nfs4", |
1782 | "gfs", | |
1783 | "gfs2" | |
42856c10 LP |
1784 | }; |
1785 | ||
1786 | unsigned i; | |
1787 | ||
1788 | for (i = 0; i < ELEMENTSOF(table); i++) | |
1789 | if (streq(table[i], fstype)) | |
1790 | return true; | |
1791 | ||
1792 | return false; | |
1793 | } | |
1794 | ||
601f6a1e LP |
1795 | int chvt(int vt) { |
1796 | int fd, r = 0; | |
1797 | ||
1798 | if ((fd = open("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) | |
1799 | return -errno; | |
1800 | ||
1801 | if (vt < 0) { | |
1802 | int tiocl[2] = { | |
1803 | TIOCL_GETKMSGREDIRECT, | |
1804 | 0 | |
1805 | }; | |
1806 | ||
1807 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) | |
1808 | return -errno; | |
1809 | ||
1810 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1811 | } | |
1812 | ||
1813 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
1814 | r = -errno; | |
1815 | ||
a16e1123 | 1816 | close_nointr_nofail(r); |
601f6a1e LP |
1817 | return r; |
1818 | } | |
1819 | ||
80876c20 LP |
1820 | int read_one_char(FILE *f, char *ret, bool *need_nl) { |
1821 | struct termios old_termios, new_termios; | |
1822 | char c; | |
1823 | char line[1024]; | |
1824 | ||
1825 | assert(f); | |
1826 | assert(ret); | |
1827 | ||
1828 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1829 | new_termios = old_termios; | |
1830 | ||
1831 | new_termios.c_lflag &= ~ICANON; | |
1832 | new_termios.c_cc[VMIN] = 1; | |
1833 | new_termios.c_cc[VTIME] = 0; | |
1834 | ||
1835 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1836 | size_t k; | |
1837 | ||
1838 | k = fread(&c, 1, 1, f); | |
1839 | ||
1840 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1841 | ||
1842 | if (k <= 0) | |
1843 | return -EIO; | |
1844 | ||
1845 | if (need_nl) | |
1846 | *need_nl = c != '\n'; | |
1847 | ||
1848 | *ret = c; | |
1849 | return 0; | |
1850 | } | |
1851 | } | |
1852 | ||
1853 | if (!(fgets(line, sizeof(line), f))) | |
1854 | return -EIO; | |
1855 | ||
1856 | truncate_nl(line); | |
1857 | ||
1858 | if (strlen(line) != 1) | |
1859 | return -EBADMSG; | |
1860 | ||
1861 | if (need_nl) | |
1862 | *need_nl = false; | |
1863 | ||
1864 | *ret = line[0]; | |
1865 | return 0; | |
1866 | } | |
1867 | ||
1868 | int ask(char *ret, const char *replies, const char *text, ...) { | |
1869 | assert(ret); | |
1870 | assert(replies); | |
1871 | assert(text); | |
1872 | ||
1873 | for (;;) { | |
1874 | va_list ap; | |
1875 | char c; | |
1876 | int r; | |
1877 | bool need_nl = true; | |
1878 | ||
b1b2dc0c LP |
1879 | fputs("\x1B[1m", stdout); |
1880 | ||
80876c20 LP |
1881 | va_start(ap, text); |
1882 | vprintf(text, ap); | |
1883 | va_end(ap); | |
1884 | ||
b1b2dc0c LP |
1885 | fputs("\x1B[0m", stdout); |
1886 | ||
80876c20 LP |
1887 | fflush(stdout); |
1888 | ||
1889 | if ((r = read_one_char(stdin, &c, &need_nl)) < 0) { | |
1890 | ||
1891 | if (r == -EBADMSG) { | |
1892 | puts("Bad input, please try again."); | |
1893 | continue; | |
1894 | } | |
1895 | ||
1896 | putchar('\n'); | |
1897 | return r; | |
1898 | } | |
1899 | ||
1900 | if (need_nl) | |
1901 | putchar('\n'); | |
1902 | ||
1903 | if (strchr(replies, c)) { | |
1904 | *ret = c; | |
1905 | return 0; | |
1906 | } | |
1907 | ||
1908 | puts("Read unexpected character, please try again."); | |
1909 | } | |
1910 | } | |
1911 | ||
1912 | int reset_terminal(int fd) { | |
1913 | struct termios termios; | |
1914 | int r = 0; | |
3fe5e5d4 LP |
1915 | long arg; |
1916 | ||
1917 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
1918 | |
1919 | assert(fd >= 0); | |
1920 | ||
eed1d0e3 LP |
1921 | /* We leave locked terminal attributes untouched, so that |
1922 | * Plymouth may set whatever it wants to set, and we don't | |
1923 | * interfere with that. */ | |
3fe5e5d4 LP |
1924 | |
1925 | /* Disable exclusive mode, just in case */ | |
1926 | ioctl(fd, TIOCNXCL); | |
1927 | ||
1928 | /* Enable console unicode mode */ | |
1929 | arg = K_UNICODE; | |
1930 | ioctl(fd, KDSKBMODE, &arg); | |
80876c20 LP |
1931 | |
1932 | if (tcgetattr(fd, &termios) < 0) { | |
1933 | r = -errno; | |
1934 | goto finish; | |
1935 | } | |
1936 | ||
aaf694ca LP |
1937 | /* We only reset the stuff that matters to the software. How |
1938 | * hardware is set up we don't touch assuming that somebody | |
1939 | * else will do that for us */ | |
1940 | ||
1941 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
1942 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
1943 | termios.c_oflag |= ONLCR; | |
1944 | termios.c_cflag |= CREAD; | |
1945 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
1946 | ||
1947 | termios.c_cc[VINTR] = 03; /* ^C */ | |
1948 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
1949 | termios.c_cc[VERASE] = 0177; | |
1950 | termios.c_cc[VKILL] = 025; /* ^X */ | |
1951 | termios.c_cc[VEOF] = 04; /* ^D */ | |
1952 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
1953 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
1954 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
1955 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
1956 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
1957 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
1958 | termios.c_cc[VEOL] = 0; |
1959 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
1960 | |
1961 | termios.c_cc[VTIME] = 0; | |
1962 | termios.c_cc[VMIN] = 1; | |
1963 | ||
1964 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
1965 | r = -errno; | |
1966 | ||
1967 | finish: | |
1968 | /* Just in case, flush all crap out */ | |
1969 | tcflush(fd, TCIOFLUSH); | |
1970 | ||
1971 | return r; | |
1972 | } | |
1973 | ||
1974 | int open_terminal(const char *name, int mode) { | |
1975 | int fd, r; | |
1976 | ||
1977 | if ((fd = open(name, mode)) < 0) | |
1978 | return -errno; | |
1979 | ||
1980 | if ((r = isatty(fd)) < 0) { | |
1981 | close_nointr_nofail(fd); | |
1982 | return -errno; | |
1983 | } | |
1984 | ||
1985 | if (!r) { | |
1986 | close_nointr_nofail(fd); | |
1987 | return -ENOTTY; | |
1988 | } | |
1989 | ||
1990 | return fd; | |
1991 | } | |
1992 | ||
1993 | int flush_fd(int fd) { | |
1994 | struct pollfd pollfd; | |
1995 | ||
1996 | zero(pollfd); | |
1997 | pollfd.fd = fd; | |
1998 | pollfd.events = POLLIN; | |
1999 | ||
2000 | for (;;) { | |
2001 | char buf[1024]; | |
2002 | ssize_t l; | |
2003 | int r; | |
2004 | ||
2005 | if ((r = poll(&pollfd, 1, 0)) < 0) { | |
2006 | ||
2007 | if (errno == EINTR) | |
2008 | continue; | |
2009 | ||
2010 | return -errno; | |
2011 | } | |
2012 | ||
2013 | if (r == 0) | |
2014 | return 0; | |
2015 | ||
2016 | if ((l = read(fd, buf, sizeof(buf))) < 0) { | |
2017 | ||
2018 | if (errno == EINTR) | |
2019 | continue; | |
2020 | ||
2021 | if (errno == EAGAIN) | |
2022 | return 0; | |
2023 | ||
2024 | return -errno; | |
2025 | } | |
2026 | ||
2027 | if (l <= 0) | |
2028 | return 0; | |
2029 | } | |
2030 | } | |
2031 | ||
21de3988 | 2032 | int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm) { |
bab45044 | 2033 | int fd = -1, notify = -1, r, wd = -1; |
80876c20 LP |
2034 | |
2035 | assert(name); | |
2036 | ||
2037 | /* We use inotify to be notified when the tty is closed. We | |
2038 | * create the watch before checking if we can actually acquire | |
2039 | * it, so that we don't lose any event. | |
2040 | * | |
2041 | * Note: strictly speaking this actually watches for the | |
2042 | * device being closed, it does *not* really watch whether a | |
2043 | * tty loses its controlling process. However, unless some | |
2044 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2045 | * its tty otherwise this will not become a problem. As long | |
2046 | * as the administrator makes sure not configure any service | |
2047 | * on the same tty as an untrusted user this should not be a | |
2048 | * problem. (Which he probably should not do anyway.) */ | |
2049 | ||
2050 | if (!fail && !force) { | |
2051 | if ((notify = inotify_init1(IN_CLOEXEC)) < 0) { | |
2052 | r = -errno; | |
2053 | goto fail; | |
2054 | } | |
2055 | ||
2056 | if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) { | |
2057 | r = -errno; | |
2058 | goto fail; | |
2059 | } | |
2060 | } | |
2061 | ||
2062 | for (;;) { | |
e3d1855b LP |
2063 | if (notify >= 0) |
2064 | if ((r = flush_fd(notify)) < 0) | |
2065 | goto fail; | |
80876c20 LP |
2066 | |
2067 | /* We pass here O_NOCTTY only so that we can check the return | |
2068 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2069 | * successfully became the controlling process of the tty */ | |
2070 | if ((fd = open_terminal(name, O_RDWR|O_NOCTTY)) < 0) | |
2071 | return -errno; | |
2072 | ||
2073 | /* First, try to get the tty */ | |
21de3988 LP |
2074 | r = ioctl(fd, TIOCSCTTY, force); |
2075 | ||
2076 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2077 | * returning EPERM, i.e. when very likely we already | |
2078 | * are have this controlling terminal. */ | |
2079 | if (r < 0 && errno == EPERM && ignore_tiocstty_eperm) | |
2080 | r = 0; | |
2081 | ||
2082 | if (r < 0 && (force || fail || errno != EPERM)) { | |
80876c20 LP |
2083 | r = -errno; |
2084 | goto fail; | |
2085 | } | |
2086 | ||
2087 | if (r >= 0) | |
2088 | break; | |
2089 | ||
2090 | assert(!fail); | |
2091 | assert(!force); | |
2092 | assert(notify >= 0); | |
2093 | ||
2094 | for (;;) { | |
2095 | struct inotify_event e; | |
2096 | ssize_t l; | |
2097 | ||
2098 | if ((l = read(notify, &e, sizeof(e))) != sizeof(e)) { | |
2099 | ||
2100 | if (l < 0) { | |
2101 | ||
2102 | if (errno == EINTR) | |
2103 | continue; | |
2104 | ||
2105 | r = -errno; | |
2106 | } else | |
2107 | r = -EIO; | |
2108 | ||
2109 | goto fail; | |
2110 | } | |
2111 | ||
2112 | if (e.wd != wd || !(e.mask & IN_CLOSE)) { | |
7bc0351d | 2113 | r = -EIO; |
80876c20 LP |
2114 | goto fail; |
2115 | } | |
2116 | ||
2117 | break; | |
2118 | } | |
2119 | ||
2120 | /* We close the tty fd here since if the old session | |
2121 | * ended our handle will be dead. It's important that | |
2122 | * we do this after sleeping, so that we don't enter | |
2123 | * an endless loop. */ | |
2124 | close_nointr_nofail(fd); | |
2125 | } | |
2126 | ||
2127 | if (notify >= 0) | |
a16e1123 | 2128 | close_nointr_nofail(notify); |
80876c20 LP |
2129 | |
2130 | if ((r = reset_terminal(fd)) < 0) | |
2131 | log_warning("Failed to reset terminal: %s", strerror(-r)); | |
2132 | ||
2133 | return fd; | |
2134 | ||
2135 | fail: | |
2136 | if (fd >= 0) | |
a16e1123 | 2137 | close_nointr_nofail(fd); |
80876c20 LP |
2138 | |
2139 | if (notify >= 0) | |
a16e1123 | 2140 | close_nointr_nofail(notify); |
80876c20 LP |
2141 | |
2142 | return r; | |
2143 | } | |
2144 | ||
2145 | int release_terminal(void) { | |
2146 | int r = 0, fd; | |
57cd2192 | 2147 | struct sigaction sa_old, sa_new; |
80876c20 | 2148 | |
57cd2192 | 2149 | if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY)) < 0) |
80876c20 LP |
2150 | return -errno; |
2151 | ||
57cd2192 LP |
2152 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2153 | * by our own TIOCNOTTY */ | |
2154 | ||
2155 | zero(sa_new); | |
2156 | sa_new.sa_handler = SIG_IGN; | |
2157 | sa_new.sa_flags = SA_RESTART; | |
2158 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); | |
2159 | ||
80876c20 LP |
2160 | if (ioctl(fd, TIOCNOTTY) < 0) |
2161 | r = -errno; | |
2162 | ||
57cd2192 LP |
2163 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2164 | ||
80876c20 LP |
2165 | close_nointr_nofail(fd); |
2166 | return r; | |
2167 | } | |
2168 | ||
9a34ec5f LP |
2169 | int sigaction_many(const struct sigaction *sa, ...) { |
2170 | va_list ap; | |
2171 | int r = 0, sig; | |
2172 | ||
2173 | va_start(ap, sa); | |
2174 | while ((sig = va_arg(ap, int)) > 0) | |
2175 | if (sigaction(sig, sa, NULL) < 0) | |
2176 | r = -errno; | |
2177 | va_end(ap); | |
2178 | ||
2179 | return r; | |
2180 | } | |
2181 | ||
2182 | int ignore_signals(int sig, ...) { | |
a337c6fc | 2183 | struct sigaction sa; |
9a34ec5f LP |
2184 | va_list ap; |
2185 | int r = 0; | |
a337c6fc LP |
2186 | |
2187 | zero(sa); | |
2188 | sa.sa_handler = SIG_IGN; | |
2189 | sa.sa_flags = SA_RESTART; | |
2190 | ||
9a34ec5f LP |
2191 | if (sigaction(sig, &sa, NULL) < 0) |
2192 | r = -errno; | |
2193 | ||
2194 | va_start(ap, sig); | |
2195 | while ((sig = va_arg(ap, int)) > 0) | |
2196 | if (sigaction(sig, &sa, NULL) < 0) | |
2197 | r = -errno; | |
2198 | va_end(ap); | |
2199 | ||
2200 | return r; | |
2201 | } | |
2202 | ||
2203 | int default_signals(int sig, ...) { | |
2204 | struct sigaction sa; | |
2205 | va_list ap; | |
2206 | int r = 0; | |
2207 | ||
2208 | zero(sa); | |
2209 | sa.sa_handler = SIG_DFL; | |
2210 | sa.sa_flags = SA_RESTART; | |
2211 | ||
2212 | if (sigaction(sig, &sa, NULL) < 0) | |
2213 | r = -errno; | |
2214 | ||
2215 | va_start(ap, sig); | |
2216 | while ((sig = va_arg(ap, int)) > 0) | |
2217 | if (sigaction(sig, &sa, NULL) < 0) | |
2218 | r = -errno; | |
2219 | va_end(ap); | |
2220 | ||
2221 | return r; | |
a337c6fc LP |
2222 | } |
2223 | ||
8d567588 LP |
2224 | int close_pipe(int p[]) { |
2225 | int a = 0, b = 0; | |
2226 | ||
2227 | assert(p); | |
2228 | ||
2229 | if (p[0] >= 0) { | |
2230 | a = close_nointr(p[0]); | |
2231 | p[0] = -1; | |
2232 | } | |
2233 | ||
2234 | if (p[1] >= 0) { | |
2235 | b = close_nointr(p[1]); | |
2236 | p[1] = -1; | |
2237 | } | |
2238 | ||
2239 | return a < 0 ? a : b; | |
2240 | } | |
2241 | ||
eb22ac37 | 2242 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
8d567588 LP |
2243 | uint8_t *p; |
2244 | ssize_t n = 0; | |
2245 | ||
2246 | assert(fd >= 0); | |
2247 | assert(buf); | |
2248 | ||
2249 | p = buf; | |
2250 | ||
2251 | while (nbytes > 0) { | |
2252 | ssize_t k; | |
2253 | ||
2254 | if ((k = read(fd, p, nbytes)) <= 0) { | |
2255 | ||
eb22ac37 | 2256 | if (k < 0 && errno == EINTR) |
8d567588 LP |
2257 | continue; |
2258 | ||
eb22ac37 | 2259 | if (k < 0 && errno == EAGAIN && do_poll) { |
8d567588 LP |
2260 | struct pollfd pollfd; |
2261 | ||
2262 | zero(pollfd); | |
2263 | pollfd.fd = fd; | |
2264 | pollfd.events = POLLIN; | |
2265 | ||
2266 | if (poll(&pollfd, 1, -1) < 0) { | |
2267 | if (errno == EINTR) | |
2268 | continue; | |
2269 | ||
2270 | return n > 0 ? n : -errno; | |
2271 | } | |
2272 | ||
2273 | if (pollfd.revents != POLLIN) | |
2274 | return n > 0 ? n : -EIO; | |
2275 | ||
2276 | continue; | |
2277 | } | |
2278 | ||
2279 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2280 | } | |
2281 | ||
2282 | p += k; | |
2283 | nbytes -= k; | |
2284 | n += k; | |
2285 | } | |
2286 | ||
2287 | return n; | |
2288 | } | |
2289 | ||
eb22ac37 LP |
2290 | ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
2291 | const uint8_t *p; | |
2292 | ssize_t n = 0; | |
2293 | ||
2294 | assert(fd >= 0); | |
2295 | assert(buf); | |
2296 | ||
2297 | p = buf; | |
2298 | ||
2299 | while (nbytes > 0) { | |
2300 | ssize_t k; | |
2301 | ||
2302 | if ((k = write(fd, p, nbytes)) <= 0) { | |
2303 | ||
2304 | if (k < 0 && errno == EINTR) | |
2305 | continue; | |
2306 | ||
2307 | if (k < 0 && errno == EAGAIN && do_poll) { | |
2308 | struct pollfd pollfd; | |
2309 | ||
2310 | zero(pollfd); | |
2311 | pollfd.fd = fd; | |
2312 | pollfd.events = POLLOUT; | |
2313 | ||
2314 | if (poll(&pollfd, 1, -1) < 0) { | |
2315 | if (errno == EINTR) | |
2316 | continue; | |
2317 | ||
2318 | return n > 0 ? n : -errno; | |
2319 | } | |
2320 | ||
2321 | if (pollfd.revents != POLLOUT) | |
2322 | return n > 0 ? n : -EIO; | |
2323 | ||
2324 | continue; | |
2325 | } | |
2326 | ||
2327 | return n > 0 ? n : (k < 0 ? -errno : 0); | |
2328 | } | |
2329 | ||
2330 | p += k; | |
2331 | nbytes -= k; | |
2332 | n += k; | |
2333 | } | |
2334 | ||
2335 | return n; | |
2336 | } | |
2337 | ||
8d567588 LP |
2338 | int path_is_mount_point(const char *t) { |
2339 | struct stat a, b; | |
35d2e7ec LP |
2340 | char *parent; |
2341 | int r; | |
8d567588 LP |
2342 | |
2343 | if (lstat(t, &a) < 0) { | |
8d567588 LP |
2344 | if (errno == ENOENT) |
2345 | return 0; | |
2346 | ||
2347 | return -errno; | |
2348 | } | |
2349 | ||
35d2e7ec LP |
2350 | if ((r = parent_of_path(t, &parent)) < 0) |
2351 | return r; | |
8d567588 | 2352 | |
35d2e7ec LP |
2353 | r = lstat(parent, &b); |
2354 | free(parent); | |
8d567588 | 2355 | |
35d2e7ec LP |
2356 | if (r < 0) |
2357 | return -errno; | |
8d567588 LP |
2358 | |
2359 | return a.st_dev != b.st_dev; | |
2360 | } | |
2361 | ||
24a6e4a4 LP |
2362 | int parse_usec(const char *t, usec_t *usec) { |
2363 | static const struct { | |
2364 | const char *suffix; | |
2365 | usec_t usec; | |
2366 | } table[] = { | |
2367 | { "sec", USEC_PER_SEC }, | |
2368 | { "s", USEC_PER_SEC }, | |
2369 | { "min", USEC_PER_MINUTE }, | |
2370 | { "hr", USEC_PER_HOUR }, | |
2371 | { "h", USEC_PER_HOUR }, | |
2372 | { "d", USEC_PER_DAY }, | |
2373 | { "w", USEC_PER_WEEK }, | |
2374 | { "msec", USEC_PER_MSEC }, | |
2375 | { "ms", USEC_PER_MSEC }, | |
2376 | { "m", USEC_PER_MINUTE }, | |
2377 | { "usec", 1ULL }, | |
2378 | { "us", 1ULL }, | |
2379 | { "", USEC_PER_SEC }, | |
2380 | }; | |
2381 | ||
2382 | const char *p; | |
2383 | usec_t r = 0; | |
2384 | ||
2385 | assert(t); | |
2386 | assert(usec); | |
2387 | ||
2388 | p = t; | |
2389 | do { | |
2390 | long long l; | |
2391 | char *e; | |
2392 | unsigned i; | |
2393 | ||
2394 | errno = 0; | |
2395 | l = strtoll(p, &e, 10); | |
2396 | ||
2397 | if (errno != 0) | |
2398 | return -errno; | |
2399 | ||
2400 | if (l < 0) | |
2401 | return -ERANGE; | |
2402 | ||
2403 | if (e == p) | |
2404 | return -EINVAL; | |
2405 | ||
2406 | e += strspn(e, WHITESPACE); | |
2407 | ||
2408 | for (i = 0; i < ELEMENTSOF(table); i++) | |
2409 | if (startswith(e, table[i].suffix)) { | |
2410 | r += (usec_t) l * table[i].usec; | |
2411 | p = e + strlen(table[i].suffix); | |
2412 | break; | |
2413 | } | |
2414 | ||
2415 | if (i >= ELEMENTSOF(table)) | |
2416 | return -EINVAL; | |
2417 | ||
2418 | } while (*p != 0); | |
2419 | ||
2420 | *usec = r; | |
2421 | ||
2422 | return 0; | |
2423 | } | |
2424 | ||
843d2643 LP |
2425 | int make_stdio(int fd) { |
2426 | int r, s, t; | |
2427 | ||
2428 | assert(fd >= 0); | |
2429 | ||
2430 | r = dup2(fd, STDIN_FILENO); | |
2431 | s = dup2(fd, STDOUT_FILENO); | |
2432 | t = dup2(fd, STDERR_FILENO); | |
2433 | ||
2434 | if (fd >= 3) | |
2435 | close_nointr_nofail(fd); | |
2436 | ||
2437 | if (r < 0 || s < 0 || t < 0) | |
2438 | return -errno; | |
2439 | ||
2440 | return 0; | |
2441 | } | |
2442 | ||
cb8a8f78 LP |
2443 | bool is_clean_exit(int code, int status) { |
2444 | ||
2445 | if (code == CLD_EXITED) | |
2446 | return status == 0; | |
2447 | ||
2448 | /* If a daemon does not implement handlers for some of the | |
2449 | * signals that's not considered an unclean shutdown */ | |
2450 | if (code == CLD_KILLED) | |
2451 | return | |
2452 | status == SIGHUP || | |
2453 | status == SIGINT || | |
2454 | status == SIGTERM || | |
2455 | status == SIGPIPE; | |
2456 | ||
2457 | return false; | |
2458 | } | |
2459 | ||
d06dacd0 LP |
2460 | bool is_clean_exit_lsb(int code, int status) { |
2461 | ||
2462 | if (is_clean_exit(code, status)) | |
2463 | return true; | |
2464 | ||
2465 | return | |
2466 | code == CLD_EXITED && | |
2467 | (status == EXIT_NOTINSTALLED || status == EXIT_NOTCONFIGURED); | |
2468 | } | |
2469 | ||
8407a5d0 LP |
2470 | bool is_device_path(const char *path) { |
2471 | ||
2472 | /* Returns true on paths that refer to a device, either in | |
2473 | * sysfs or in /dev */ | |
2474 | ||
2475 | return | |
2476 | path_startswith(path, "/dev/") || | |
2477 | path_startswith(path, "/sys/"); | |
2478 | } | |
2479 | ||
01f78473 LP |
2480 | int dir_is_empty(const char *path) { |
2481 | DIR *d; | |
2482 | int r; | |
2483 | struct dirent buf, *de; | |
2484 | ||
2485 | if (!(d = opendir(path))) | |
2486 | return -errno; | |
2487 | ||
2488 | for (;;) { | |
2489 | if ((r = readdir_r(d, &buf, &de)) > 0) { | |
2490 | r = -r; | |
2491 | break; | |
2492 | } | |
2493 | ||
2494 | if (!de) { | |
2495 | r = 1; | |
2496 | break; | |
2497 | } | |
2498 | ||
2499 | if (!ignore_file(de->d_name)) { | |
2500 | r = 0; | |
2501 | break; | |
2502 | } | |
2503 | } | |
2504 | ||
2505 | closedir(d); | |
2506 | return r; | |
2507 | } | |
2508 | ||
d3782d60 LP |
2509 | unsigned long long random_ull(void) { |
2510 | int fd; | |
2511 | uint64_t ull; | |
2512 | ssize_t r; | |
2513 | ||
2514 | if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0) | |
2515 | goto fallback; | |
2516 | ||
eb22ac37 | 2517 | r = loop_read(fd, &ull, sizeof(ull), true); |
d3782d60 LP |
2518 | close_nointr_nofail(fd); |
2519 | ||
2520 | if (r != sizeof(ull)) | |
2521 | goto fallback; | |
2522 | ||
2523 | return ull; | |
2524 | ||
2525 | fallback: | |
2526 | return random() * RAND_MAX + random(); | |
2527 | } | |
2528 | ||
5b6319dc LP |
2529 | void rename_process(const char name[8]) { |
2530 | assert(name); | |
2531 | ||
2532 | prctl(PR_SET_NAME, name); | |
2533 | ||
2534 | /* This is a like a poor man's setproctitle(). The string | |
2535 | * passed should fit in 7 chars (i.e. the length of | |
2536 | * "systemd") */ | |
2537 | ||
2538 | if (program_invocation_name) | |
2539 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
2540 | } | |
2541 | ||
7d793605 LP |
2542 | void sigset_add_many(sigset_t *ss, ...) { |
2543 | va_list ap; | |
2544 | int sig; | |
2545 | ||
2546 | assert(ss); | |
2547 | ||
2548 | va_start(ap, ss); | |
2549 | while ((sig = va_arg(ap, int)) > 0) | |
2550 | assert_se(sigaddset(ss, sig) == 0); | |
2551 | va_end(ap); | |
2552 | } | |
2553 | ||
ef2f1067 LP |
2554 | char* gethostname_malloc(void) { |
2555 | struct utsname u; | |
2556 | ||
2557 | assert_se(uname(&u) >= 0); | |
2558 | ||
2559 | if (u.nodename[0]) | |
2560 | return strdup(u.nodename); | |
2561 | ||
2562 | return strdup(u.sysname); | |
2563 | } | |
2564 | ||
2565 | char* getlogname_malloc(void) { | |
2566 | uid_t uid; | |
2567 | long bufsize; | |
2568 | char *buf, *name; | |
2569 | struct passwd pwbuf, *pw = NULL; | |
2570 | struct stat st; | |
2571 | ||
2572 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2573 | uid = st.st_uid; | |
2574 | else | |
2575 | uid = getuid(); | |
2576 | ||
2577 | /* Shortcut things to avoid NSS lookups */ | |
2578 | if (uid == 0) | |
2579 | return strdup("root"); | |
2580 | ||
2581 | if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0) | |
2582 | bufsize = 4096; | |
2583 | ||
2584 | if (!(buf = malloc(bufsize))) | |
2585 | return NULL; | |
2586 | ||
2587 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) { | |
2588 | name = strdup(pw->pw_name); | |
2589 | free(buf); | |
2590 | return name; | |
2591 | } | |
2592 | ||
2593 | free(buf); | |
2594 | ||
2595 | if (asprintf(&name, "%lu", (unsigned long) uid) < 0) | |
2596 | return NULL; | |
2597 | ||
2598 | return name; | |
2599 | } | |
2600 | ||
8c6db833 LP |
2601 | int getttyname_malloc(char **r) { |
2602 | char path[PATH_MAX], *p, *c; | |
618e02c7 | 2603 | int k; |
8c6db833 LP |
2604 | |
2605 | assert(r); | |
ef2f1067 | 2606 | |
618e02c7 LP |
2607 | if ((k = ttyname_r(STDIN_FILENO, path, sizeof(path))) != 0) |
2608 | return -k; | |
ef2f1067 LP |
2609 | |
2610 | char_array_0(path); | |
2611 | ||
2612 | p = path; | |
2613 | if (startswith(path, "/dev/")) | |
2614 | p += 5; | |
2615 | ||
8c6db833 LP |
2616 | if (!(c = strdup(p))) |
2617 | return -ENOMEM; | |
2618 | ||
2619 | *r = c; | |
2620 | return 0; | |
2621 | } | |
2622 | ||
2623 | static int rm_rf_children(int fd, bool only_dirs) { | |
2624 | DIR *d; | |
2625 | int ret = 0; | |
2626 | ||
2627 | assert(fd >= 0); | |
2628 | ||
2629 | /* This returns the first error we run into, but nevertheless | |
2630 | * tries to go on */ | |
2631 | ||
2632 | if (!(d = fdopendir(fd))) { | |
2633 | close_nointr_nofail(fd); | |
4c633005 LP |
2634 | |
2635 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2636 | } |
2637 | ||
2638 | for (;;) { | |
2639 | struct dirent buf, *de; | |
2640 | bool is_dir; | |
2641 | int r; | |
2642 | ||
2643 | if ((r = readdir_r(d, &buf, &de)) != 0) { | |
2644 | if (ret == 0) | |
2645 | ret = -r; | |
2646 | break; | |
2647 | } | |
2648 | ||
2649 | if (!de) | |
2650 | break; | |
2651 | ||
2652 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
2653 | continue; | |
2654 | ||
2655 | if (de->d_type == DT_UNKNOWN) { | |
2656 | struct stat st; | |
2657 | ||
2658 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { | |
4c633005 | 2659 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2660 | ret = -errno; |
2661 | continue; | |
2662 | } | |
2663 | ||
2664 | is_dir = S_ISDIR(st.st_mode); | |
2665 | } else | |
2666 | is_dir = de->d_type == DT_DIR; | |
2667 | ||
2668 | if (is_dir) { | |
2669 | int subdir_fd; | |
2670 | ||
2671 | if ((subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) { | |
4c633005 | 2672 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2673 | ret = -errno; |
2674 | continue; | |
2675 | } | |
2676 | ||
2677 | if ((r = rm_rf_children(subdir_fd, only_dirs)) < 0) { | |
2678 | if (ret == 0) | |
2679 | ret = r; | |
2680 | } | |
2681 | ||
2682 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
4c633005 | 2683 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2684 | ret = -errno; |
2685 | } | |
2686 | } else if (!only_dirs) { | |
2687 | ||
2688 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 2689 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2690 | ret = -errno; |
2691 | } | |
2692 | } | |
2693 | } | |
2694 | ||
2695 | closedir(d); | |
2696 | ||
2697 | return ret; | |
2698 | } | |
2699 | ||
2700 | int rm_rf(const char *path, bool only_dirs, bool delete_root) { | |
2701 | int fd; | |
2702 | int r; | |
2703 | ||
2704 | assert(path); | |
2705 | ||
2706 | if ((fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) { | |
2707 | ||
2708 | if (errno != ENOTDIR) | |
2709 | return -errno; | |
2710 | ||
2711 | if (delete_root && !only_dirs) | |
2712 | if (unlink(path) < 0) | |
2713 | return -errno; | |
2714 | ||
2715 | return 0; | |
2716 | } | |
2717 | ||
2718 | r = rm_rf_children(fd, only_dirs); | |
2719 | ||
2720 | if (delete_root) | |
2721 | if (rmdir(path) < 0) { | |
2722 | if (r == 0) | |
2723 | r = -errno; | |
2724 | } | |
2725 | ||
2726 | return r; | |
2727 | } | |
2728 | ||
2729 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { | |
2730 | assert(path); | |
2731 | ||
2732 | /* Under the assumption that we are running privileged we | |
2733 | * first change the access mode and only then hand out | |
2734 | * ownership to avoid a window where access is too open. */ | |
2735 | ||
2736 | if (chmod(path, mode) < 0) | |
2737 | return -errno; | |
2738 | ||
2739 | if (chown(path, uid, gid) < 0) | |
2740 | return -errno; | |
2741 | ||
2742 | return 0; | |
ef2f1067 LP |
2743 | } |
2744 | ||
82c121a4 LP |
2745 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2746 | cpu_set_t *r; | |
2747 | unsigned n = 1024; | |
2748 | ||
2749 | /* Allocates the cpuset in the right size */ | |
2750 | ||
2751 | for (;;) { | |
2752 | if (!(r = CPU_ALLOC(n))) | |
2753 | return NULL; | |
2754 | ||
2755 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2756 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2757 | ||
2758 | if (ncpus) | |
2759 | *ncpus = n; | |
2760 | ||
2761 | return r; | |
2762 | } | |
2763 | ||
2764 | CPU_FREE(r); | |
2765 | ||
2766 | if (errno != EINVAL) | |
2767 | return NULL; | |
2768 | ||
2769 | n *= 2; | |
2770 | } | |
2771 | } | |
2772 | ||
9e58ff9c LP |
2773 | void status_vprintf(const char *format, va_list ap) { |
2774 | char *s = NULL; | |
2775 | int fd = -1; | |
2776 | ||
2777 | assert(format); | |
2778 | ||
2779 | /* This independent of logging, as status messages are | |
2780 | * optional and go exclusively to the console. */ | |
2781 | ||
2782 | if (vasprintf(&s, format, ap) < 0) | |
2783 | goto finish; | |
2784 | ||
2785 | if ((fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) | |
2786 | goto finish; | |
2787 | ||
2788 | write(fd, s, strlen(s)); | |
2789 | ||
2790 | finish: | |
2791 | free(s); | |
2792 | ||
2793 | if (fd >= 0) | |
2794 | close_nointr_nofail(fd); | |
2795 | } | |
2796 | ||
c846ff47 LP |
2797 | void status_printf(const char *format, ...) { |
2798 | va_list ap; | |
2799 | ||
2800 | assert(format); | |
2801 | ||
2802 | va_start(ap, format); | |
2803 | status_vprintf(format, ap); | |
2804 | va_end(ap); | |
2805 | } | |
2806 | ||
2807 | void status_welcome(void) { | |
2808 | ||
2809 | #if defined(TARGET_FEDORA) | |
2810 | char *r; | |
2811 | ||
2812 | if (read_one_line_file("/etc/system-release", &r) < 0) | |
2813 | return; | |
2814 | ||
2815 | truncate_nl(r); | |
2816 | ||
2817 | /* This tries to mimic the color magic the old Red Hat sysinit | |
2818 | * script did. */ | |
2819 | ||
2820 | if (startswith(r, "Red Hat")) | |
2e54424d | 2821 | status_printf("Welcome to \x1B[0;31m%s\x1B[0m!\n", r); /* Red for RHEL */ |
c846ff47 | 2822 | else if (startswith(r, "Fedora")) |
2e54424d | 2823 | status_printf("Welcome to \x1B[0;34m%s\x1B[0m!\n", r); /* Blue for Fedora */ |
c846ff47 | 2824 | else |
2e54424d | 2825 | status_printf("Welcome to %s!\n", r); |
c846ff47 LP |
2826 | |
2827 | free(r); | |
2828 | ||
2829 | #elif defined(TARGET_SUSE) | |
2830 | char *r; | |
2831 | ||
2832 | if (read_one_line_file("/etc/SuSE-release", &r) < 0) | |
2833 | return; | |
2834 | ||
2835 | truncate_nl(r); | |
2836 | ||
2e54424d | 2837 | status_printf("Welcome to \x1B[0;32m%s\x1B[0m!\n", r); /* Green for SUSE */ |
0d37b36b | 2838 | free(r); |
5a6225fd | 2839 | |
0d37b36b GSB |
2840 | #elif defined(TARGET_GENTOO) |
2841 | char *r; | |
2842 | ||
2843 | if (read_one_line_file("/etc/gentoo-release", &r) < 0) | |
2844 | return; | |
2845 | ||
2846 | truncate_nl(r); | |
2847 | ||
2848 | status_printf("Welcome to \x1B[1;34m%s\x1B[0m!\n", r); /* Light Blue for Gentoo */ | |
2849 | ||
c846ff47 | 2850 | free(r); |
5a6225fd SD |
2851 | |
2852 | #elif defined(TARGET_DEBIAN) | |
2e78aa99 | 2853 | char *r; |
5a6225fd | 2854 | |
2e78aa99 LP |
2855 | if (read_one_line_file("/etc/debian_version", &r) < 0) |
2856 | return; | |
5a6225fd | 2857 | |
2e78aa99 | 2858 | truncate_nl(r); |
5a6225fd | 2859 | |
2e78aa99 | 2860 | status_printf("Welcome to Debian \x1B[1;31m%s\x1B[0m!\n", r); /* Light Red for Debian */ |
5a6225fd | 2861 | |
2e78aa99 | 2862 | free(r); |
17dbb83d | 2863 | #elif defined(TARGET_ARCH) |
2e78aa99 | 2864 | status_printf("Welcome to \x1B[1;36mArch Linux\x1B[0m!\n"); /* Cyan for Arch */ |
c846ff47 LP |
2865 | #else |
2866 | #warning "You probably should add a welcome text logic here." | |
2867 | #endif | |
2868 | } | |
2869 | ||
fab56fc5 LP |
2870 | char *replace_env(const char *format, char **env) { |
2871 | enum { | |
2872 | WORD, | |
c24eb49e | 2873 | CURLY, |
fab56fc5 LP |
2874 | VARIABLE |
2875 | } state = WORD; | |
2876 | ||
2877 | const char *e, *word = format; | |
2878 | char *r = NULL, *k; | |
2879 | ||
2880 | assert(format); | |
2881 | ||
2882 | for (e = format; *e; e ++) { | |
2883 | ||
2884 | switch (state) { | |
2885 | ||
2886 | case WORD: | |
2887 | if (*e == '$') | |
c24eb49e | 2888 | state = CURLY; |
fab56fc5 LP |
2889 | break; |
2890 | ||
c24eb49e LP |
2891 | case CURLY: |
2892 | if (*e == '{') { | |
fab56fc5 LP |
2893 | if (!(k = strnappend(r, word, e-word-1))) |
2894 | goto fail; | |
2895 | ||
2896 | free(r); | |
2897 | r = k; | |
2898 | ||
2899 | word = e-1; | |
2900 | state = VARIABLE; | |
2901 | ||
2902 | } else if (*e == '$') { | |
2903 | if (!(k = strnappend(r, word, e-word))) | |
2904 | goto fail; | |
2905 | ||
2906 | free(r); | |
2907 | r = k; | |
2908 | ||
2909 | word = e+1; | |
2910 | state = WORD; | |
2911 | } else | |
2912 | state = WORD; | |
2913 | break; | |
2914 | ||
2915 | case VARIABLE: | |
c24eb49e | 2916 | if (*e == '}') { |
b95cf362 | 2917 | const char *t; |
fab56fc5 | 2918 | |
b95cf362 LP |
2919 | if (!(t = strv_env_get_with_length(env, word+2, e-word-2))) |
2920 | t = ""; | |
fab56fc5 | 2921 | |
b95cf362 LP |
2922 | if (!(k = strappend(r, t))) |
2923 | goto fail; | |
fab56fc5 | 2924 | |
b95cf362 LP |
2925 | free(r); |
2926 | r = k; | |
fab56fc5 | 2927 | |
b95cf362 | 2928 | word = e+1; |
fab56fc5 LP |
2929 | state = WORD; |
2930 | } | |
2931 | break; | |
2932 | } | |
2933 | } | |
2934 | ||
2935 | if (!(k = strnappend(r, word, e-word))) | |
2936 | goto fail; | |
2937 | ||
2938 | free(r); | |
2939 | return k; | |
2940 | ||
2941 | fail: | |
2942 | free(r); | |
2943 | return NULL; | |
2944 | } | |
2945 | ||
2946 | char **replace_env_argv(char **argv, char **env) { | |
2947 | char **r, **i; | |
c24eb49e LP |
2948 | unsigned k = 0, l = 0; |
2949 | ||
2950 | l = strv_length(argv); | |
fab56fc5 | 2951 | |
c24eb49e | 2952 | if (!(r = new(char*, l+1))) |
fab56fc5 LP |
2953 | return NULL; |
2954 | ||
2955 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
2956 | |
2957 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
2958 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
2959 | char *e; | |
2960 | char **w, **m; | |
2961 | unsigned q; | |
c24eb49e | 2962 | |
b95cf362 | 2963 | if ((e = strv_env_get(env, *i+1))) { |
c24eb49e LP |
2964 | |
2965 | if (!(m = strv_split_quoted(e))) { | |
2966 | r[k] = NULL; | |
2967 | strv_free(r); | |
2968 | return NULL; | |
2969 | } | |
b95cf362 LP |
2970 | } else |
2971 | m = NULL; | |
c24eb49e | 2972 | |
b95cf362 LP |
2973 | q = strv_length(m); |
2974 | l = l + q - 1; | |
c24eb49e | 2975 | |
b95cf362 LP |
2976 | if (!(w = realloc(r, sizeof(char*) * (l+1)))) { |
2977 | r[k] = NULL; | |
2978 | strv_free(r); | |
2979 | strv_free(m); | |
2980 | return NULL; | |
2981 | } | |
c24eb49e | 2982 | |
b95cf362 LP |
2983 | r = w; |
2984 | if (m) { | |
c24eb49e LP |
2985 | memcpy(r + k, m, q * sizeof(char*)); |
2986 | free(m); | |
c24eb49e | 2987 | } |
b95cf362 LP |
2988 | |
2989 | k += q; | |
2990 | continue; | |
c24eb49e LP |
2991 | } |
2992 | ||
2993 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
fab56fc5 LP |
2994 | if (!(r[k++] = replace_env(*i, env))) { |
2995 | strv_free(r); | |
2996 | return NULL; | |
2997 | } | |
2998 | } | |
2999 | ||
3000 | r[k] = NULL; | |
3001 | return r; | |
3002 | } | |
3003 | ||
fa776d8e LP |
3004 | int columns(void) { |
3005 | static __thread int parsed_columns = 0; | |
3006 | const char *e; | |
3007 | ||
3008 | if (parsed_columns > 0) | |
3009 | return parsed_columns; | |
3010 | ||
3011 | if ((e = getenv("COLUMNS"))) | |
3012 | parsed_columns = atoi(e); | |
3013 | ||
3014 | if (parsed_columns <= 0) { | |
3015 | struct winsize ws; | |
3016 | zero(ws); | |
3017 | ||
9ed95f43 | 3018 | if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) >= 0) |
fa776d8e LP |
3019 | parsed_columns = ws.ws_col; |
3020 | } | |
3021 | ||
3022 | if (parsed_columns <= 0) | |
3023 | parsed_columns = 80; | |
3024 | ||
3025 | return parsed_columns; | |
3026 | } | |
3027 | ||
b4f10a5e LP |
3028 | int running_in_chroot(void) { |
3029 | struct stat a, b; | |
3030 | ||
3031 | zero(a); | |
3032 | zero(b); | |
3033 | ||
3034 | /* Only works as root */ | |
3035 | ||
3036 | if (stat("/proc/1/root", &a) < 0) | |
3037 | return -errno; | |
3038 | ||
3039 | if (stat("/", &b) < 0) | |
3040 | return -errno; | |
3041 | ||
3042 | return | |
3043 | a.st_dev != b.st_dev || | |
3044 | a.st_ino != b.st_ino; | |
3045 | } | |
3046 | ||
8fe914ec LP |
3047 | char *ellipsize(const char *s, unsigned length, unsigned percent) { |
3048 | size_t l, x; | |
3049 | char *r; | |
3050 | ||
3051 | assert(s); | |
3052 | assert(percent <= 100); | |
3053 | assert(length >= 3); | |
3054 | ||
3055 | l = strlen(s); | |
3056 | ||
3057 | if (l <= 3 || l <= length) | |
3058 | return strdup(s); | |
3059 | ||
3060 | if (!(r = new0(char, length+1))) | |
3061 | return r; | |
3062 | ||
3063 | x = (length * percent) / 100; | |
3064 | ||
3065 | if (x > length - 3) | |
3066 | x = length - 3; | |
3067 | ||
3068 | memcpy(r, s, x); | |
3069 | r[x] = '.'; | |
3070 | r[x+1] = '.'; | |
3071 | r[x+2] = '.'; | |
3072 | memcpy(r + x + 3, | |
3073 | s + l - (length - x - 3), | |
3074 | length - x - 3); | |
3075 | ||
3076 | return r; | |
3077 | } | |
3078 | ||
f6144808 LP |
3079 | int touch(const char *path) { |
3080 | int fd; | |
3081 | ||
3082 | assert(path); | |
3083 | ||
3084 | if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0666)) < 0) | |
3085 | return -errno; | |
3086 | ||
3087 | close_nointr_nofail(fd); | |
3088 | return 0; | |
3089 | } | |
afea26ad | 3090 | |
11ce3427 LP |
3091 | char *unquote(const char *s, const char quote) { |
3092 | size_t l; | |
3093 | assert(s); | |
3094 | ||
3095 | if ((l = strlen(s)) < 2) | |
3096 | return strdup(s); | |
3097 | ||
3098 | if (s[0] == quote && s[l-1] == quote) | |
3099 | return strndup(s+1, l-2); | |
3100 | ||
3101 | return strdup(s); | |
3102 | } | |
3103 | ||
2e78aa99 LP |
3104 | int waitpid_loop(pid_t pid, int *status) { |
3105 | assert(pid >= 1); | |
3106 | assert(status); | |
3107 | ||
3108 | for (;;) { | |
3109 | if (waitpid(pid, status, 0) < 0) { | |
3110 | ||
3111 | if (errno == EINTR) | |
3112 | continue; | |
3113 | ||
3114 | return -errno; | |
3115 | } | |
3116 | ||
3117 | return 0; | |
3118 | } | |
3119 | } | |
3120 | ||
1dccbe19 LP |
3121 | static const char *const ioprio_class_table[] = { |
3122 | [IOPRIO_CLASS_NONE] = "none", | |
3123 | [IOPRIO_CLASS_RT] = "realtime", | |
3124 | [IOPRIO_CLASS_BE] = "best-effort", | |
3125 | [IOPRIO_CLASS_IDLE] = "idle" | |
3126 | }; | |
3127 | ||
3128 | DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int); | |
3129 | ||
3130 | static const char *const sigchld_code_table[] = { | |
3131 | [CLD_EXITED] = "exited", | |
3132 | [CLD_KILLED] = "killed", | |
3133 | [CLD_DUMPED] = "dumped", | |
3134 | [CLD_TRAPPED] = "trapped", | |
3135 | [CLD_STOPPED] = "stopped", | |
3136 | [CLD_CONTINUED] = "continued", | |
3137 | }; | |
3138 | ||
3139 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
3140 | ||
3141 | static const char *const log_facility_table[LOG_NFACILITIES] = { | |
3142 | [LOG_FAC(LOG_KERN)] = "kern", | |
3143 | [LOG_FAC(LOG_USER)] = "user", | |
3144 | [LOG_FAC(LOG_MAIL)] = "mail", | |
3145 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
3146 | [LOG_FAC(LOG_AUTH)] = "auth", | |
3147 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
3148 | [LOG_FAC(LOG_LPR)] = "lpr", | |
3149 | [LOG_FAC(LOG_NEWS)] = "news", | |
3150 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
3151 | [LOG_FAC(LOG_CRON)] = "cron", | |
3152 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
3153 | [LOG_FAC(LOG_FTP)] = "ftp", | |
3154 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
3155 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
3156 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
3157 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
3158 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
3159 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
3160 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
3161 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
3162 | }; | |
3163 | ||
3164 | DEFINE_STRING_TABLE_LOOKUP(log_facility, int); | |
3165 | ||
3166 | static const char *const log_level_table[] = { | |
3167 | [LOG_EMERG] = "emerg", | |
3168 | [LOG_ALERT] = "alert", | |
3169 | [LOG_CRIT] = "crit", | |
3170 | [LOG_ERR] = "err", | |
3171 | [LOG_WARNING] = "warning", | |
3172 | [LOG_NOTICE] = "notice", | |
3173 | [LOG_INFO] = "info", | |
3174 | [LOG_DEBUG] = "debug" | |
3175 | }; | |
3176 | ||
3177 | DEFINE_STRING_TABLE_LOOKUP(log_level, int); | |
3178 | ||
3179 | static const char* const sched_policy_table[] = { | |
3180 | [SCHED_OTHER] = "other", | |
3181 | [SCHED_BATCH] = "batch", | |
3182 | [SCHED_IDLE] = "idle", | |
3183 | [SCHED_FIFO] = "fifo", | |
3184 | [SCHED_RR] = "rr" | |
3185 | }; | |
3186 | ||
3187 | DEFINE_STRING_TABLE_LOOKUP(sched_policy, int); | |
3188 | ||
3189 | static const char* const rlimit_table[] = { | |
3190 | [RLIMIT_CPU] = "LimitCPU", | |
3191 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
3192 | [RLIMIT_DATA] = "LimitDATA", | |
3193 | [RLIMIT_STACK] = "LimitSTACK", | |
3194 | [RLIMIT_CORE] = "LimitCORE", | |
3195 | [RLIMIT_RSS] = "LimitRSS", | |
3196 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
3197 | [RLIMIT_AS] = "LimitAS", | |
3198 | [RLIMIT_NPROC] = "LimitNPROC", | |
3199 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
3200 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
3201 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
3202 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
3203 | [RLIMIT_NICE] = "LimitNICE", | |
3204 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
3205 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
3206 | }; | |
3207 | ||
3208 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
4fd5948e LP |
3209 | |
3210 | static const char* const ip_tos_table[] = { | |
3211 | [IPTOS_LOWDELAY] = "low-delay", | |
3212 | [IPTOS_THROUGHPUT] = "throughput", | |
3213 | [IPTOS_RELIABILITY] = "reliability", | |
3214 | [IPTOS_LOWCOST] = "low-cost", | |
3215 | }; | |
3216 | ||
3217 | DEFINE_STRING_TABLE_LOOKUP(ip_tos, int); | |
2e22afe9 LP |
3218 | |
3219 | static const char *const signal_table[] = { | |
3220 | [SIGHUP] = "HUP", | |
3221 | [SIGINT] = "INT", | |
3222 | [SIGQUIT] = "QUIT", | |
3223 | [SIGILL] = "ILL", | |
3224 | [SIGTRAP] = "TRAP", | |
3225 | [SIGABRT] = "ABRT", | |
3226 | [SIGBUS] = "BUS", | |
3227 | [SIGFPE] = "FPE", | |
3228 | [SIGKILL] = "KILL", | |
3229 | [SIGUSR1] = "USR1", | |
3230 | [SIGSEGV] = "SEGV", | |
3231 | [SIGUSR2] = "USR2", | |
3232 | [SIGPIPE] = "PIPE", | |
3233 | [SIGALRM] = "ALRM", | |
3234 | [SIGTERM] = "TERM", | |
f26ee0b9 LP |
3235 | #ifdef SIGSTKFLT |
3236 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
3237 | #endif | |
2e22afe9 LP |
3238 | [SIGCHLD] = "CHLD", |
3239 | [SIGCONT] = "CONT", | |
3240 | [SIGSTOP] = "STOP", | |
3241 | [SIGTSTP] = "TSTP", | |
3242 | [SIGTTIN] = "TTIN", | |
3243 | [SIGTTOU] = "TTOU", | |
3244 | [SIGURG] = "URG", | |
3245 | [SIGXCPU] = "XCPU", | |
3246 | [SIGXFSZ] = "XFSZ", | |
3247 | [SIGVTALRM] = "VTALRM", | |
3248 | [SIGPROF] = "PROF", | |
3249 | [SIGWINCH] = "WINCH", | |
3250 | [SIGIO] = "IO", | |
3251 | [SIGPWR] = "PWR", | |
3252 | [SIGSYS] = "SYS" | |
3253 | }; | |
3254 | ||
3255 | DEFINE_STRING_TABLE_LOOKUP(signal, int); |