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