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