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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
60918275 LP |
22 | #include <string.h> |
23 | #include <unistd.h> | |
24 | #include <errno.h> | |
85261803 | 25 | #include <stdlib.h> |
034c6ed7 | 26 | #include <signal.h> |
20f56fdd DR |
27 | #include <libintl.h> |
28 | #include <locale.h> | |
034c6ed7 | 29 | #include <stdio.h> |
1dccbe19 LP |
30 | #include <syslog.h> |
31 | #include <sched.h> | |
32 | #include <sys/resource.h> | |
ef886c6a | 33 | #include <linux/sched.h> |
a9f5d454 LP |
34 | #include <sys/types.h> |
35 | #include <sys/stat.h> | |
3a0ecb08 | 36 | #include <fcntl.h> |
a0d40ac5 | 37 | #include <dirent.h> |
601f6a1e LP |
38 | #include <sys/ioctl.h> |
39 | #include <linux/vt.h> | |
40 | #include <linux/tiocl.h> | |
80876c20 LP |
41 | #include <termios.h> |
42 | #include <stdarg.h> | |
0a6f50c0 | 43 | #include <poll.h> |
3177a7fa | 44 | #include <ctype.h> |
5b6319dc | 45 | #include <sys/prctl.h> |
ef2f1067 LP |
46 | #include <sys/utsname.h> |
47 | #include <pwd.h> | |
4fd5948e | 48 | #include <netinet/ip.h> |
3fe5e5d4 | 49 | #include <linux/kd.h> |
2e78aa99 | 50 | #include <sys/wait.h> |
7948c4df | 51 | #include <sys/time.h> |
8092a428 | 52 | #include <glob.h> |
4b67834e | 53 | #include <grp.h> |
87d2c1ff | 54 | #include <sys/mman.h> |
825c6fe5 | 55 | #include <sys/vfs.h> |
6d313367 | 56 | #include <sys/mount.h> |
825c6fe5 | 57 | #include <linux/magic.h> |
0b507b17 | 58 | #include <limits.h> |
09017585 MS |
59 | #include <langinfo.h> |
60 | #include <locale.h> | |
6afc95b7 | 61 | #include <sys/personality.h> |
4a4d89b6 | 62 | #include <sys/xattr.h> |
abe4aa14 | 63 | #include <sys/statvfs.h> |
30535c16 | 64 | #include <sys/file.h> |
11689d2a | 65 | #include <linux/fs.h> |
eef46c37 LP |
66 | |
67 | /* When we include libgen.h because we need dirname() we immediately | |
68 | * undefine basename() since libgen.h defines it as a macro to the XDG | |
69 | * version which is really broken. */ | |
70 | #include <libgen.h> | |
2b6bf07d | 71 | #undef basename |
60918275 | 72 | |
9bf3b535 LP |
73 | #ifdef HAVE_SYS_AUXV_H |
74 | #include <sys/auxv.h> | |
75 | #endif | |
76 | ||
20f56fdd | 77 | #include "config.h" |
60918275 LP |
78 | #include "macro.h" |
79 | #include "util.h" | |
1dccbe19 LP |
80 | #include "ioprio.h" |
81 | #include "missing.h" | |
a9f5d454 | 82 | #include "log.h" |
65d2ebdc | 83 | #include "strv.h" |
c38dfac9 | 84 | #include "mkdir.h" |
9eb977db | 85 | #include "path-util.h" |
d06dacd0 | 86 | #include "exit-status.h" |
83cc030f | 87 | #include "hashmap.h" |
4d1a6904 | 88 | #include "env-util.h" |
a5c32cff | 89 | #include "fileio.h" |
8f6ce71f | 90 | #include "device-nodes.h" |
f405e86d SL |
91 | #include "utf8.h" |
92 | #include "gunicode.h" | |
295edddf | 93 | #include "virt.h" |
477def80 | 94 | #include "def.h" |
4a4d89b6 | 95 | #include "sparse-endian.h" |
56cf987f | 96 | |
9a0e6896 LP |
97 | int saved_argc = 0; |
98 | char **saved_argv = NULL; | |
9086e840 | 99 | |
28917d7d | 100 | static volatile unsigned cached_columns = 0; |
ed757c0c | 101 | static volatile unsigned cached_lines = 0; |
9a0e6896 | 102 | |
37f85e66 | 103 | size_t page_size(void) { |
ec202eae | 104 | static thread_local size_t pgsz = 0; |
37f85e66 | 105 | long r; |
106 | ||
87d2c1ff | 107 | if (_likely_(pgsz > 0)) |
37f85e66 | 108 | return pgsz; |
109 | ||
e67f47e5 LP |
110 | r = sysconf(_SC_PAGESIZE); |
111 | assert(r > 0); | |
37f85e66 | 112 | |
113 | pgsz = (size_t) r; | |
37f85e66 | 114 | return pgsz; |
115 | } | |
116 | ||
e05797fb LP |
117 | bool streq_ptr(const char *a, const char *b) { |
118 | ||
119 | /* Like streq(), but tries to make sense of NULL pointers */ | |
120 | ||
121 | if (a && b) | |
122 | return streq(a, b); | |
123 | ||
124 | if (!a && !b) | |
125 | return true; | |
126 | ||
127 | return false; | |
128 | } | |
129 | ||
8c7c140f | 130 | char* endswith(const char *s, const char *postfix) { |
60918275 LP |
131 | size_t sl, pl; |
132 | ||
133 | assert(s); | |
134 | assert(postfix); | |
135 | ||
136 | sl = strlen(s); | |
137 | pl = strlen(postfix); | |
138 | ||
d4d0d4db | 139 | if (pl == 0) |
8c7c140f | 140 | return (char*) s + sl; |
d4d0d4db | 141 | |
60918275 | 142 | if (sl < pl) |
8c7c140f LP |
143 | return NULL; |
144 | ||
145 | if (memcmp(s + sl - pl, postfix, pl) != 0) | |
146 | return NULL; | |
60918275 | 147 | |
8c7c140f | 148 | return (char*) s + sl - pl; |
60918275 LP |
149 | } |
150 | ||
5cb36f41 | 151 | char* first_word(const char *s, const char *word) { |
79d6d816 | 152 | size_t sl, wl; |
5cb36f41 | 153 | const char *p; |
79d6d816 LP |
154 | |
155 | assert(s); | |
156 | assert(word); | |
157 | ||
5cb36f41 LP |
158 | /* Checks if the string starts with the specified word, either |
159 | * followed by NUL or by whitespace. Returns a pointer to the | |
160 | * NUL or the first character after the whitespace. */ | |
161 | ||
79d6d816 LP |
162 | sl = strlen(s); |
163 | wl = strlen(word); | |
164 | ||
165 | if (sl < wl) | |
5cb36f41 | 166 | return NULL; |
79d6d816 | 167 | |
d4d0d4db | 168 | if (wl == 0) |
5cb36f41 | 169 | return (char*) s; |
d4d0d4db | 170 | |
79d6d816 | 171 | if (memcmp(s, word, wl) != 0) |
5cb36f41 LP |
172 | return NULL; |
173 | ||
174 | p = s + wl; | |
175 | if (*p == 0) | |
176 | return (char*) p; | |
177 | ||
178 | if (!strchr(WHITESPACE, *p)) | |
179 | return NULL; | |
79d6d816 | 180 | |
5cb36f41 LP |
181 | p += strspn(p, WHITESPACE); |
182 | return (char*) p; | |
79d6d816 LP |
183 | } |
184 | ||
c593bb36 JF |
185 | static size_t cescape_char(char c, char *buf) { |
186 | char * buf_old = buf; | |
187 | ||
188 | switch (c) { | |
189 | ||
190 | case '\a': | |
191 | *(buf++) = '\\'; | |
192 | *(buf++) = 'a'; | |
193 | break; | |
194 | case '\b': | |
195 | *(buf++) = '\\'; | |
196 | *(buf++) = 'b'; | |
197 | break; | |
198 | case '\f': | |
199 | *(buf++) = '\\'; | |
200 | *(buf++) = 'f'; | |
201 | break; | |
202 | case '\n': | |
203 | *(buf++) = '\\'; | |
204 | *(buf++) = 'n'; | |
205 | break; | |
206 | case '\r': | |
207 | *(buf++) = '\\'; | |
208 | *(buf++) = 'r'; | |
209 | break; | |
210 | case '\t': | |
211 | *(buf++) = '\\'; | |
212 | *(buf++) = 't'; | |
213 | break; | |
214 | case '\v': | |
215 | *(buf++) = '\\'; | |
216 | *(buf++) = 'v'; | |
217 | break; | |
218 | case '\\': | |
219 | *(buf++) = '\\'; | |
220 | *(buf++) = '\\'; | |
221 | break; | |
222 | case '"': | |
223 | *(buf++) = '\\'; | |
224 | *(buf++) = '"'; | |
225 | break; | |
226 | case '\'': | |
227 | *(buf++) = '\\'; | |
228 | *(buf++) = '\''; | |
229 | break; | |
230 | ||
231 | default: | |
232 | /* For special chars we prefer octal over | |
233 | * hexadecimal encoding, simply because glib's | |
234 | * g_strescape() does the same */ | |
235 | if ((c < ' ') || (c >= 127)) { | |
236 | *(buf++) = '\\'; | |
237 | *(buf++) = octchar((unsigned char) c >> 6); | |
238 | *(buf++) = octchar((unsigned char) c >> 3); | |
239 | *(buf++) = octchar((unsigned char) c); | |
240 | } else | |
241 | *(buf++) = c; | |
242 | break; | |
243 | } | |
244 | ||
245 | return buf - buf_old; | |
246 | } | |
247 | ||
42f4e3c4 | 248 | int close_nointr(int fd) { |
b0ee8068 | 249 | assert(fd >= 0); |
a9f85faf LP |
250 | |
251 | if (close(fd) >= 0) | |
252 | return 0; | |
253 | ||
254 | /* | |
255 | * Just ignore EINTR; a retry loop is the wrong thing to do on | |
256 | * Linux. | |
257 | * | |
258 | * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html | |
259 | * https://bugzilla.gnome.org/show_bug.cgi?id=682819 | |
260 | * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR | |
261 | * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain | |
262 | */ | |
263 | if (errno == EINTR) | |
d96ea504 | 264 | return 0; |
a9f85faf LP |
265 | |
266 | return -errno; | |
60918275 | 267 | } |
85261803 | 268 | |
03e334a1 LP |
269 | int safe_close(int fd) { |
270 | ||
271 | /* | |
272 | * Like close_nointr() but cannot fail. Guarantees errno is | |
273 | * unchanged. Is a NOP with negative fds passed, and returns | |
274 | * -1, so that it can be used in this syntax: | |
275 | * | |
276 | * fd = safe_close(fd); | |
277 | */ | |
85f136b5 | 278 | |
03e334a1 LP |
279 | if (fd >= 0) { |
280 | PROTECT_ERRNO; | |
d96ea504 LP |
281 | |
282 | /* The kernel might return pretty much any error code | |
283 | * via close(), but the fd will be closed anyway. The | |
284 | * only condition we want to check for here is whether | |
285 | * the fd was invalid at all... */ | |
286 | ||
287 | assert_se(close_nointr(fd) != -EBADF); | |
03e334a1 | 288 | } |
85f136b5 | 289 | |
03e334a1 | 290 | return -1; |
85f136b5 LP |
291 | } |
292 | ||
5b6319dc LP |
293 | void close_many(const int fds[], unsigned n_fd) { |
294 | unsigned i; | |
295 | ||
2c93b4ef LP |
296 | assert(fds || n_fd <= 0); |
297 | ||
5b6319dc | 298 | for (i = 0; i < n_fd; i++) |
03e334a1 | 299 | safe_close(fds[i]); |
5b6319dc LP |
300 | } |
301 | ||
4b73a0c0 LP |
302 | int unlink_noerrno(const char *path) { |
303 | PROTECT_ERRNO; | |
304 | int r; | |
305 | ||
306 | r = unlink(path); | |
307 | if (r < 0) | |
308 | return -errno; | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
85261803 LP |
313 | int parse_boolean(const char *v) { |
314 | assert(v); | |
315 | ||
0f625d0b | 316 | if (streq(v, "1") || strcaseeq(v, "yes") || strcaseeq(v, "y") || strcaseeq(v, "true") || strcaseeq(v, "t") || strcaseeq(v, "on")) |
85261803 | 317 | return 1; |
0f625d0b | 318 | else if (streq(v, "0") || strcaseeq(v, "no") || strcaseeq(v, "n") || strcaseeq(v, "false") || strcaseeq(v, "f") || strcaseeq(v, "off")) |
85261803 LP |
319 | return 0; |
320 | ||
321 | return -EINVAL; | |
322 | } | |
323 | ||
3ba686c1 | 324 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 325 | unsigned long ul = 0; |
3ba686c1 LP |
326 | pid_t pid; |
327 | int r; | |
328 | ||
329 | assert(s); | |
330 | assert(ret_pid); | |
331 | ||
e67f47e5 LP |
332 | r = safe_atolu(s, &ul); |
333 | if (r < 0) | |
3ba686c1 LP |
334 | return r; |
335 | ||
336 | pid = (pid_t) ul; | |
337 | ||
338 | if ((unsigned long) pid != ul) | |
339 | return -ERANGE; | |
340 | ||
341 | if (pid <= 0) | |
342 | return -ERANGE; | |
343 | ||
344 | *ret_pid = pid; | |
345 | return 0; | |
346 | } | |
347 | ||
034a2a52 LP |
348 | int parse_uid(const char *s, uid_t* ret_uid) { |
349 | unsigned long ul = 0; | |
350 | uid_t uid; | |
351 | int r; | |
352 | ||
353 | assert(s); | |
354 | assert(ret_uid); | |
355 | ||
e67f47e5 LP |
356 | r = safe_atolu(s, &ul); |
357 | if (r < 0) | |
034a2a52 LP |
358 | return r; |
359 | ||
360 | uid = (uid_t) ul; | |
361 | ||
362 | if ((unsigned long) uid != ul) | |
363 | return -ERANGE; | |
364 | ||
fed1e721 | 365 | /* Some libc APIs use UID_INVALID as special placeholder */ |
306a55c8 | 366 | if (uid == (uid_t) 0xFFFFFFFF) |
f841a154 | 367 | return -ENXIO; |
306a55c8 | 368 | |
6afeb1cf | 369 | /* A long time ago UIDs where 16bit, hence explicitly avoid the 16bit -1 too */ |
306a55c8 | 370 | if (uid == (uid_t) 0xFFFF) |
f841a154 | 371 | return -ENXIO; |
306a55c8 | 372 | |
034a2a52 LP |
373 | *ret_uid = uid; |
374 | return 0; | |
375 | } | |
376 | ||
85261803 LP |
377 | int safe_atou(const char *s, unsigned *ret_u) { |
378 | char *x = NULL; | |
034c6ed7 | 379 | unsigned long l; |
85261803 LP |
380 | |
381 | assert(s); | |
382 | assert(ret_u); | |
383 | ||
384 | errno = 0; | |
385 | l = strtoul(s, &x, 0); | |
386 | ||
f3910003 | 387 | if (!x || x == s || *x || errno) |
48deb058 | 388 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 389 | |
034c6ed7 | 390 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
391 | return -ERANGE; |
392 | ||
393 | *ret_u = (unsigned) l; | |
394 | return 0; | |
395 | } | |
396 | ||
397 | int safe_atoi(const char *s, int *ret_i) { | |
398 | char *x = NULL; | |
034c6ed7 | 399 | long l; |
85261803 LP |
400 | |
401 | assert(s); | |
402 | assert(ret_i); | |
403 | ||
404 | errno = 0; | |
405 | l = strtol(s, &x, 0); | |
406 | ||
f3910003 | 407 | if (!x || x == s || *x || errno) |
48deb058 | 408 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 409 | |
034c6ed7 | 410 | if ((long) (int) l != l) |
85261803 LP |
411 | return -ERANGE; |
412 | ||
034c6ed7 LP |
413 | *ret_i = (int) l; |
414 | return 0; | |
415 | } | |
416 | ||
b914e211 LP |
417 | int safe_atou8(const char *s, uint8_t *ret) { |
418 | char *x = NULL; | |
419 | unsigned long l; | |
420 | ||
421 | assert(s); | |
422 | assert(ret); | |
423 | ||
424 | errno = 0; | |
425 | l = strtoul(s, &x, 0); | |
426 | ||
427 | if (!x || x == s || *x || errno) | |
428 | return errno > 0 ? -errno : -EINVAL; | |
429 | ||
430 | if ((unsigned long) (uint8_t) l != l) | |
431 | return -ERANGE; | |
432 | ||
433 | *ret = (uint8_t) l; | |
434 | return 0; | |
435 | } | |
436 | ||
781fa938 LP |
437 | int safe_atou16(const char *s, uint16_t *ret) { |
438 | char *x = NULL; | |
439 | unsigned long l; | |
440 | ||
441 | assert(s); | |
442 | assert(ret); | |
443 | ||
444 | errno = 0; | |
445 | l = strtoul(s, &x, 0); | |
446 | ||
447 | if (!x || x == s || *x || errno) | |
448 | return errno > 0 ? -errno : -EINVAL; | |
449 | ||
450 | if ((unsigned long) (uint16_t) l != l) | |
451 | return -ERANGE; | |
452 | ||
453 | *ret = (uint16_t) l; | |
454 | return 0; | |
455 | } | |
456 | ||
457 | int safe_atoi16(const char *s, int16_t *ret) { | |
458 | char *x = NULL; | |
459 | long l; | |
460 | ||
461 | assert(s); | |
462 | assert(ret); | |
463 | ||
464 | errno = 0; | |
465 | l = strtol(s, &x, 0); | |
466 | ||
467 | if (!x || x == s || *x || errno) | |
468 | return errno > 0 ? -errno : -EINVAL; | |
469 | ||
470 | if ((long) (int16_t) l != l) | |
471 | return -ERANGE; | |
472 | ||
473 | *ret = (int16_t) l; | |
474 | return 0; | |
475 | } | |
476 | ||
034c6ed7 LP |
477 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
478 | char *x = NULL; | |
479 | unsigned long long l; | |
480 | ||
481 | assert(s); | |
482 | assert(ret_llu); | |
483 | ||
484 | errno = 0; | |
485 | l = strtoull(s, &x, 0); | |
486 | ||
f3910003 | 487 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
488 | return errno ? -errno : -EINVAL; |
489 | ||
490 | *ret_llu = l; | |
491 | return 0; | |
492 | } | |
493 | ||
494 | int safe_atolli(const char *s, long long int *ret_lli) { | |
495 | char *x = NULL; | |
496 | long long l; | |
497 | ||
498 | assert(s); | |
499 | assert(ret_lli); | |
500 | ||
501 | errno = 0; | |
502 | l = strtoll(s, &x, 0); | |
503 | ||
f3910003 | 504 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
505 | return errno ? -errno : -EINVAL; |
506 | ||
507 | *ret_lli = l; | |
85261803 LP |
508 | return 0; |
509 | } | |
a41e8209 | 510 | |
f7900e25 TA |
511 | int safe_atod(const char *s, double *ret_d) { |
512 | char *x = NULL; | |
32b2634e | 513 | double d = 0; |
0193ad26 | 514 | locale_t loc; |
f7900e25 TA |
515 | |
516 | assert(s); | |
517 | assert(ret_d); | |
518 | ||
0193ad26 CR |
519 | loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0); |
520 | if (loc == (locale_t) 0) | |
521 | return -errno; | |
f7900e25 | 522 | |
0193ad26 CR |
523 | errno = 0; |
524 | d = strtod_l(s, &x, loc); | |
525 | ||
526 | if (!x || x == s || *x || errno) { | |
527 | freelocale(loc); | |
f7900e25 | 528 | return errno ? -errno : -EINVAL; |
0193ad26 | 529 | } |
f7900e25 | 530 | |
0193ad26 | 531 | freelocale(loc); |
f7900e25 TA |
532 | *ret_d = (double) d; |
533 | return 0; | |
534 | } | |
535 | ||
bf85c24d SP |
536 | static size_t strcspn_escaped(const char *s, const char *reject) { |
537 | bool escaped = false; | |
ba774317 | 538 | int n; |
bf85c24d SP |
539 | |
540 | for (n=0; s[n]; n++) { | |
541 | if (escaped) | |
542 | escaped = false; | |
543 | else if (s[n] == '\\') | |
544 | escaped = true; | |
545 | else if (strchr(reject, s[n])) | |
a2a5291b | 546 | break; |
bf85c24d | 547 | } |
ba774317 | 548 | |
a2a5291b ZJS |
549 | /* if s ends in \, return index of previous char */ |
550 | return n - escaped; | |
bf85c24d SP |
551 | } |
552 | ||
a41e8209 | 553 | /* Split a string into words. */ |
a2a5291b ZJS |
554 | const char* split(const char **state, size_t *l, const char *separator, bool quoted) { |
555 | const char *current; | |
a41e8209 | 556 | |
a2a5291b | 557 | current = *state; |
a41e8209 | 558 | |
a2a5291b ZJS |
559 | if (!*current) { |
560 | assert(**state == '\0'); | |
a41e8209 | 561 | return NULL; |
a2a5291b | 562 | } |
a41e8209 | 563 | |
65d2ebdc | 564 | current += strspn(current, separator); |
a2a5291b ZJS |
565 | if (!*current) { |
566 | *state = current; | |
70f75a52 | 567 | return NULL; |
a2a5291b | 568 | } |
70f75a52 | 569 | |
bf85c24d | 570 | if (quoted && strchr("\'\"", *current)) { |
a2a5291b ZJS |
571 | char quotechars[2] = {*current, '\0'}; |
572 | ||
573 | *l = strcspn_escaped(current + 1, quotechars); | |
574 | if (current[*l + 1] == '\0' || | |
575 | (current[*l + 2] && !strchr(separator, current[*l + 2]))) { | |
cc13b327 | 576 | /* right quote missing or garbage at the end */ |
a2a5291b ZJS |
577 | *state = current; |
578 | return NULL; | |
579 | } | |
580 | assert(current[*l + 1] == quotechars[0]); | |
581 | *state = current++ + *l + 2; | |
bf85c24d SP |
582 | } else if (quoted) { |
583 | *l = strcspn_escaped(current, separator); | |
ba774317 ZJS |
584 | if (current[*l] && !strchr(separator, current[*l])) { |
585 | /* unfinished escape */ | |
586 | *state = current; | |
587 | return NULL; | |
588 | } | |
a2a5291b | 589 | *state = current + *l; |
034c6ed7 | 590 | } else { |
bf85c24d | 591 | *l = strcspn(current, separator); |
a2a5291b | 592 | *state = current + *l; |
034c6ed7 LP |
593 | } |
594 | ||
a2a5291b | 595 | return current; |
034c6ed7 LP |
596 | } |
597 | ||
034c6ed7 LP |
598 | int get_parent_of_pid(pid_t pid, pid_t *_ppid) { |
599 | int r; | |
b4696bce | 600 | _cleanup_free_ char *line = NULL; |
bb00e604 | 601 | long unsigned ppid; |
49aa47c7 | 602 | const char *p; |
034c6ed7 | 603 | |
49aa47c7 | 604 | assert(pid >= 0); |
034c6ed7 LP |
605 | assert(_ppid); |
606 | ||
49aa47c7 LP |
607 | if (pid == 0) { |
608 | *_ppid = getppid(); | |
609 | return 0; | |
610 | } | |
034c6ed7 | 611 | |
49aa47c7 | 612 | p = procfs_file_alloca(pid, "stat"); |
b4696bce SP |
613 | r = read_one_line_file(p, &line); |
614 | if (r < 0) | |
034c6ed7 | 615 | return r; |
034c6ed7 | 616 | |
034c6ed7 LP |
617 | /* Let's skip the pid and comm fields. The latter is enclosed |
618 | * in () but does not escape any () in its value, so let's | |
619 | * skip over it manually */ | |
620 | ||
2fbe635a LP |
621 | p = strrchr(line, ')'); |
622 | if (!p) | |
034c6ed7 LP |
623 | return -EIO; |
624 | ||
625 | p++; | |
626 | ||
627 | if (sscanf(p, " " | |
628 | "%*c " /* state */ | |
bb00e604 | 629 | "%lu ", /* ppid */ |
034c6ed7 LP |
630 | &ppid) != 1) |
631 | return -EIO; | |
632 | ||
bb00e604 | 633 | if ((long unsigned) (pid_t) ppid != ppid) |
034c6ed7 LP |
634 | return -ERANGE; |
635 | ||
636 | *_ppid = (pid_t) ppid; | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
34ca941c LP |
641 | int fchmod_umask(int fd, mode_t m) { |
642 | mode_t u; | |
643 | int r; | |
644 | ||
645 | u = umask(0777); | |
646 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
647 | umask(u); | |
648 | ||
649 | return r; | |
650 | } | |
651 | ||
7072ced8 LP |
652 | char *truncate_nl(char *s) { |
653 | assert(s); | |
654 | ||
655 | s[strcspn(s, NEWLINE)] = 0; | |
656 | return s; | |
657 | } | |
658 | ||
93b5eaec | 659 | int get_process_state(pid_t pid) { |
e10c9985 YS |
660 | const char *p; |
661 | char state; | |
662 | int r; | |
663 | _cleanup_free_ char *line = NULL; | |
664 | ||
665 | assert(pid >= 0); | |
666 | ||
667 | p = procfs_file_alloca(pid, "stat"); | |
668 | r = read_one_line_file(p, &line); | |
669 | if (r < 0) | |
670 | return r; | |
671 | ||
672 | p = strrchr(line, ')'); | |
673 | if (!p) | |
674 | return -EIO; | |
675 | ||
676 | p++; | |
677 | ||
678 | if (sscanf(p, " %c", &state) != 1) | |
679 | return -EIO; | |
680 | ||
681 | return (unsigned char) state; | |
682 | } | |
683 | ||
87d2c1ff | 684 | int get_process_comm(pid_t pid, char **name) { |
49aa47c7 | 685 | const char *p; |
5b12334d | 686 | int r; |
7072ced8 | 687 | |
7072ced8 | 688 | assert(name); |
49aa47c7 | 689 | assert(pid >= 0); |
7072ced8 | 690 | |
b68fa010 | 691 | p = procfs_file_alloca(pid, "comm"); |
7072ced8 | 692 | |
5b12334d LP |
693 | r = read_one_line_file(p, name); |
694 | if (r == -ENOENT) | |
695 | return -ESRCH; | |
696 | ||
697 | return r; | |
7072ced8 LP |
698 | } |
699 | ||
87d2c1ff | 700 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) { |
49aa47c7 | 701 | _cleanup_fclose_ FILE *f = NULL; |
9bdbc2e2 | 702 | char *r = NULL, *k; |
49aa47c7 | 703 | const char *p; |
c59760ee | 704 | int c; |
c59760ee | 705 | |
c59760ee | 706 | assert(line); |
49aa47c7 | 707 | assert(pid >= 0); |
c59760ee | 708 | |
b68fa010 | 709 | p = procfs_file_alloca(pid, "cmdline"); |
c59760ee | 710 | |
49aa47c7 | 711 | f = fopen(p, "re"); |
c59760ee LP |
712 | if (!f) |
713 | return -errno; | |
49aa47c7 | 714 | |
9bdbc2e2 | 715 | if (max_length == 0) { |
49aa47c7 LP |
716 | size_t len = 0, allocated = 0; |
717 | ||
9bdbc2e2 | 718 | while ((c = getc(f)) != EOF) { |
49aa47c7 LP |
719 | |
720 | if (!GREEDY_REALLOC(r, allocated, len+2)) { | |
9bdbc2e2 | 721 | free(r); |
9bdbc2e2 LN |
722 | return -ENOMEM; |
723 | } | |
49aa47c7 LP |
724 | |
725 | r[len++] = isprint(c) ? c : ' '; | |
9bdbc2e2 | 726 | } |
49aa47c7 LP |
727 | |
728 | if (len > 0) | |
729 | r[len-1] = 0; | |
730 | ||
9bdbc2e2 LN |
731 | } else { |
732 | bool space = false; | |
733 | size_t left; | |
49aa47c7 | 734 | |
9bdbc2e2 | 735 | r = new(char, max_length); |
49aa47c7 | 736 | if (!r) |
9bdbc2e2 | 737 | return -ENOMEM; |
c59760ee | 738 | |
9bdbc2e2 LN |
739 | k = r; |
740 | left = max_length; | |
741 | while ((c = getc(f)) != EOF) { | |
c59760ee | 742 | |
9bdbc2e2 LN |
743 | if (isprint(c)) { |
744 | if (space) { | |
745 | if (left <= 4) | |
746 | break; | |
747 | ||
748 | *(k++) = ' '; | |
749 | left--; | |
750 | space = false; | |
751 | } | |
c59760ee | 752 | |
c59760ee LP |
753 | if (left <= 4) |
754 | break; | |
755 | ||
9bdbc2e2 | 756 | *(k++) = (char) c; |
057fbb58 | 757 | left--; |
9bdbc2e2 LN |
758 | } else |
759 | space = true; | |
760 | } | |
c59760ee | 761 | |
9bdbc2e2 LN |
762 | if (left <= 4) { |
763 | size_t n = MIN(left-1, 3U); | |
764 | memcpy(k, "...", n); | |
765 | k[n] = 0; | |
766 | } else | |
767 | *k = 0; | |
c59760ee LP |
768 | } |
769 | ||
35d2e7ec | 770 | /* Kernel threads have no argv[] */ |
0c2576ef | 771 | if (isempty(r)) { |
b47d419c | 772 | _cleanup_free_ char *t = NULL; |
35d2e7ec LP |
773 | int h; |
774 | ||
775 | free(r); | |
776 | ||
87d2c1ff LP |
777 | if (!comm_fallback) |
778 | return -ENOENT; | |
779 | ||
780 | h = get_process_comm(pid, &t); | |
781 | if (h < 0) | |
35d2e7ec LP |
782 | return h; |
783 | ||
b7def684 | 784 | r = strjoin("[", t, "]", NULL); |
87d2c1ff | 785 | if (!r) |
35d2e7ec LP |
786 | return -ENOMEM; |
787 | } | |
fa776d8e | 788 | |
c59760ee LP |
789 | *line = r; |
790 | return 0; | |
791 | } | |
792 | ||
1e5678d0 | 793 | int is_kernel_thread(pid_t pid) { |
49aa47c7 | 794 | const char *p; |
1e5678d0 LP |
795 | size_t count; |
796 | char c; | |
797 | bool eof; | |
798 | FILE *f; | |
799 | ||
800 | if (pid == 0) | |
801 | return 0; | |
802 | ||
49aa47c7 | 803 | assert(pid > 0); |
1e5678d0 | 804 | |
49aa47c7 LP |
805 | p = procfs_file_alloca(pid, "cmdline"); |
806 | f = fopen(p, "re"); | |
1e5678d0 LP |
807 | if (!f) |
808 | return -errno; | |
809 | ||
810 | count = fread(&c, 1, 1, f); | |
811 | eof = feof(f); | |
812 | fclose(f); | |
813 | ||
814 | /* Kernel threads have an empty cmdline */ | |
815 | ||
816 | if (count <= 0) | |
817 | return eof ? 1 : -errno; | |
818 | ||
819 | return 0; | |
820 | } | |
821 | ||
3a832116 SL |
822 | int get_process_capeff(pid_t pid, char **capeff) { |
823 | const char *p; | |
3a832116 SL |
824 | |
825 | assert(capeff); | |
826 | assert(pid >= 0); | |
827 | ||
b68fa010 | 828 | p = procfs_file_alloca(pid, "status"); |
3a832116 | 829 | |
69ab8088 | 830 | return get_status_field(p, "\nCapEff:", capeff); |
3a832116 | 831 | } |
49aa47c7 | 832 | |
ad450c3e JF |
833 | static int get_process_link_contents(const char *proc_file, char **name) { |
834 | int r; | |
835 | ||
836 | assert(proc_file); | |
837 | assert(name); | |
838 | ||
839 | r = readlink_malloc(proc_file, name); | |
840 | if (r < 0) | |
841 | return r == -ENOENT ? -ESRCH : r; | |
842 | ||
843 | return 0; | |
844 | } | |
845 | ||
87d2c1ff | 846 | int get_process_exe(pid_t pid, char **name) { |
49aa47c7 | 847 | const char *p; |
e79f68d1 ZJS |
848 | char *d; |
849 | int r; | |
87d2c1ff | 850 | |
49aa47c7 | 851 | assert(pid >= 0); |
87d2c1ff | 852 | |
b68fa010 | 853 | p = procfs_file_alloca(pid, "exe"); |
ad450c3e | 854 | r = get_process_link_contents(p, name); |
e79f68d1 | 855 | if (r < 0) |
ad450c3e | 856 | return r; |
e79f68d1 ZJS |
857 | |
858 | d = endswith(*name, " (deleted)"); | |
859 | if (d) | |
860 | *d = '\0'; | |
861 | ||
862 | return 0; | |
87d2c1ff LP |
863 | } |
864 | ||
901c3d0d | 865 | static int get_process_id(pid_t pid, const char *field, uid_t *uid) { |
f74e605f | 866 | _cleanup_fclose_ FILE *f = NULL; |
9db11a99 | 867 | char line[LINE_MAX]; |
49aa47c7 | 868 | const char *p; |
7e4ab3c5 | 869 | |
f74e605f | 870 | assert(field); |
7e4ab3c5 LP |
871 | assert(uid); |
872 | ||
873 | if (pid == 0) | |
874 | return getuid(); | |
875 | ||
49aa47c7 LP |
876 | p = procfs_file_alloca(pid, "status"); |
877 | f = fopen(p, "re"); | |
7e4ab3c5 LP |
878 | if (!f) |
879 | return -errno; | |
880 | ||
9db11a99 | 881 | FOREACH_LINE(line, f, return -errno) { |
f74e605f | 882 | char *l; |
7e4ab3c5 LP |
883 | |
884 | l = strstrip(line); | |
885 | ||
901c3d0d LP |
886 | if (startswith(l, field)) { |
887 | l += strlen(field); | |
7e4ab3c5 LP |
888 | l += strspn(l, WHITESPACE); |
889 | ||
890 | l[strcspn(l, WHITESPACE)] = 0; | |
891 | ||
f74e605f | 892 | return parse_uid(l, uid); |
7e4ab3c5 LP |
893 | } |
894 | } | |
895 | ||
f74e605f | 896 | return -EIO; |
7e4ab3c5 LP |
897 | } |
898 | ||
901c3d0d LP |
899 | int get_process_uid(pid_t pid, uid_t *uid) { |
900 | return get_process_id(pid, "Uid:", uid); | |
901 | } | |
902 | ||
903 | int get_process_gid(pid_t pid, gid_t *gid) { | |
49aa47c7 | 904 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); |
901c3d0d LP |
905 | return get_process_id(pid, "Gid:", gid); |
906 | } | |
907 | ||
ad450c3e JF |
908 | int get_process_cwd(pid_t pid, char **cwd) { |
909 | const char *p; | |
910 | ||
911 | assert(pid >= 0); | |
912 | ||
913 | p = procfs_file_alloca(pid, "cwd"); | |
914 | ||
915 | return get_process_link_contents(p, cwd); | |
916 | } | |
917 | ||
918 | int get_process_root(pid_t pid, char **root) { | |
919 | const char *p; | |
920 | ||
921 | assert(pid >= 0); | |
922 | ||
923 | p = procfs_file_alloca(pid, "root"); | |
924 | ||
925 | return get_process_link_contents(p, root); | |
926 | } | |
927 | ||
e706d931 | 928 | int get_process_environ(pid_t pid, char **env) { |
c593bb36 JF |
929 | _cleanup_fclose_ FILE *f = NULL; |
930 | _cleanup_free_ char *outcome = NULL; | |
931 | int c; | |
932 | const char *p; | |
933 | size_t allocated = 0, sz = 0; | |
934 | ||
935 | assert(pid >= 0); | |
e706d931 | 936 | assert(env); |
c593bb36 JF |
937 | |
938 | p = procfs_file_alloca(pid, "environ"); | |
939 | ||
940 | f = fopen(p, "re"); | |
941 | if (!f) | |
942 | return -errno; | |
943 | ||
944 | while ((c = fgetc(f)) != EOF) { | |
945 | if (!GREEDY_REALLOC(outcome, allocated, sz + 5)) | |
946 | return -ENOMEM; | |
947 | ||
948 | if (c == '\0') | |
949 | outcome[sz++] = '\n'; | |
950 | else | |
951 | sz += cescape_char(c, outcome + sz); | |
952 | } | |
953 | ||
954 | outcome[sz] = '\0'; | |
e706d931 | 955 | *env = outcome; |
c593bb36 JF |
956 | outcome = NULL; |
957 | ||
958 | return 0; | |
959 | } | |
960 | ||
fab56fc5 LP |
961 | char *strnappend(const char *s, const char *suffix, size_t b) { |
962 | size_t a; | |
44d8db9e LP |
963 | char *r; |
964 | ||
fab56fc5 LP |
965 | if (!s && !suffix) |
966 | return strdup(""); | |
967 | ||
968 | if (!s) | |
969 | return strndup(suffix, b); | |
970 | ||
971 | if (!suffix) | |
972 | return strdup(s); | |
973 | ||
44d8db9e LP |
974 | assert(s); |
975 | assert(suffix); | |
976 | ||
977 | a = strlen(s); | |
aa408e77 | 978 | if (b > ((size_t) -1) - a) |
040f18ea | 979 | return NULL; |
44d8db9e | 980 | |
040f18ea LP |
981 | r = new(char, a+b+1); |
982 | if (!r) | |
44d8db9e LP |
983 | return NULL; |
984 | ||
985 | memcpy(r, s, a); | |
986 | memcpy(r+a, suffix, b); | |
987 | r[a+b] = 0; | |
988 | ||
989 | return r; | |
990 | } | |
87f0e418 | 991 | |
fab56fc5 LP |
992 | char *strappend(const char *s, const char *suffix) { |
993 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
994 | } | |
995 | ||
849958d1 | 996 | int readlinkat_malloc(int fd, const char *p, char **ret) { |
87f0e418 | 997 | size_t l = 100; |
2d2ebd6b | 998 | int r; |
87f0e418 LP |
999 | |
1000 | assert(p); | |
2d2ebd6b | 1001 | assert(ret); |
87f0e418 LP |
1002 | |
1003 | for (;;) { | |
1004 | char *c; | |
1005 | ssize_t n; | |
1006 | ||
2d2ebd6b LP |
1007 | c = new(char, l); |
1008 | if (!c) | |
87f0e418 LP |
1009 | return -ENOMEM; |
1010 | ||
849958d1 | 1011 | n = readlinkat(fd, p, c, l-1); |
2d2ebd6b LP |
1012 | if (n < 0) { |
1013 | r = -errno; | |
87f0e418 | 1014 | free(c); |
2d2ebd6b | 1015 | return r; |
87f0e418 LP |
1016 | } |
1017 | ||
1018 | if ((size_t) n < l-1) { | |
1019 | c[n] = 0; | |
2d2ebd6b | 1020 | *ret = c; |
87f0e418 LP |
1021 | return 0; |
1022 | } | |
1023 | ||
1024 | free(c); | |
1025 | l *= 2; | |
1026 | } | |
1027 | } | |
1028 | ||
849958d1 LP |
1029 | int readlink_malloc(const char *p, char **ret) { |
1030 | return readlinkat_malloc(AT_FDCWD, p, ret); | |
1031 | } | |
1032 | ||
9a67bcf2 TG |
1033 | int readlink_value(const char *p, char **ret) { |
1034 | _cleanup_free_ char *link = NULL; | |
1035 | char *value; | |
1036 | int r; | |
1037 | ||
1038 | r = readlink_malloc(p, &link); | |
1039 | if (r < 0) | |
1040 | return r; | |
1041 | ||
1042 | value = basename(link); | |
1043 | if (!value) | |
1044 | return -ENOENT; | |
1045 | ||
1046 | value = strdup(value); | |
1047 | if (!value) | |
1048 | return -ENOMEM; | |
1049 | ||
1050 | *ret = value; | |
1051 | ||
1052 | return 0; | |
1053 | } | |
1054 | ||
2c7108c4 | 1055 | int readlink_and_make_absolute(const char *p, char **r) { |
1058cbf2 ZJS |
1056 | _cleanup_free_ char *target = NULL; |
1057 | char *k; | |
2c7108c4 LP |
1058 | int j; |
1059 | ||
1060 | assert(p); | |
1061 | assert(r); | |
1062 | ||
1058cbf2 ZJS |
1063 | j = readlink_malloc(p, &target); |
1064 | if (j < 0) | |
2c7108c4 LP |
1065 | return j; |
1066 | ||
1067 | k = file_in_same_dir(p, target); | |
2c7108c4 LP |
1068 | if (!k) |
1069 | return -ENOMEM; | |
1070 | ||
1071 | *r = k; | |
1072 | return 0; | |
1073 | } | |
1074 | ||
83096483 LP |
1075 | int readlink_and_canonicalize(const char *p, char **r) { |
1076 | char *t, *s; | |
1077 | int j; | |
1078 | ||
1079 | assert(p); | |
1080 | assert(r); | |
1081 | ||
1082 | j = readlink_and_make_absolute(p, &t); | |
1083 | if (j < 0) | |
1084 | return j; | |
1085 | ||
1086 | s = canonicalize_file_name(t); | |
1087 | if (s) { | |
1088 | free(t); | |
1089 | *r = s; | |
1090 | } else | |
1091 | *r = t; | |
1092 | ||
1093 | path_kill_slashes(*r); | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
2a987ee8 | 1098 | int reset_all_signal_handlers(void) { |
24a5d6b0 | 1099 | int sig, r = 0; |
2a987ee8 LP |
1100 | |
1101 | for (sig = 1; sig < _NSIG; sig++) { | |
b92bea5d ZJS |
1102 | struct sigaction sa = { |
1103 | .sa_handler = SIG_DFL, | |
1104 | .sa_flags = SA_RESTART, | |
1105 | }; | |
2a987ee8 | 1106 | |
24a5d6b0 | 1107 | /* These two cannot be caught... */ |
2a987ee8 LP |
1108 | if (sig == SIGKILL || sig == SIGSTOP) |
1109 | continue; | |
1110 | ||
2a987ee8 LP |
1111 | /* On Linux the first two RT signals are reserved by |
1112 | * glibc, and sigaction() will return EINVAL for them. */ | |
1113 | if ((sigaction(sig, &sa, NULL) < 0)) | |
24a5d6b0 LP |
1114 | if (errno != EINVAL && r == 0) |
1115 | r = -errno; | |
2a987ee8 LP |
1116 | } |
1117 | ||
24a5d6b0 | 1118 | return r; |
2a987ee8 | 1119 | } |
4a72ff34 | 1120 | |
1dedb74a LP |
1121 | int reset_signal_mask(void) { |
1122 | sigset_t ss; | |
1123 | ||
1124 | if (sigemptyset(&ss) < 0) | |
1125 | return -errno; | |
1126 | ||
1127 | if (sigprocmask(SIG_SETMASK, &ss, NULL) < 0) | |
1128 | return -errno; | |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | ||
4a72ff34 | 1133 | char *strstrip(char *s) { |
57a8eca8 | 1134 | char *e; |
4a72ff34 LP |
1135 | |
1136 | /* Drops trailing whitespace. Modifies the string in | |
1137 | * place. Returns pointer to first non-space character */ | |
1138 | ||
1139 | s += strspn(s, WHITESPACE); | |
1140 | ||
57a8eca8 LP |
1141 | for (e = strchr(s, 0); e > s; e --) |
1142 | if (!strchr(WHITESPACE, e[-1])) | |
1143 | break; | |
4a72ff34 | 1144 | |
57a8eca8 | 1145 | *e = 0; |
4a72ff34 LP |
1146 | |
1147 | return s; | |
4a72ff34 LP |
1148 | } |
1149 | ||
ee9b5e01 LP |
1150 | char *delete_chars(char *s, const char *bad) { |
1151 | char *f, *t; | |
1152 | ||
1153 | /* Drops all whitespace, regardless where in the string */ | |
1154 | ||
1155 | for (f = s, t = s; *f; f++) { | |
1156 | if (strchr(bad, *f)) | |
1157 | continue; | |
1158 | ||
1159 | *(t++) = *f; | |
1160 | } | |
1161 | ||
1162 | *t = 0; | |
1163 | ||
1164 | return s; | |
1165 | } | |
1166 | ||
4a72ff34 | 1167 | char *file_in_same_dir(const char *path, const char *filename) { |
ebd93cb6 | 1168 | char *e, *ret; |
4a72ff34 LP |
1169 | size_t k; |
1170 | ||
1171 | assert(path); | |
1172 | assert(filename); | |
1173 | ||
1174 | /* This removes the last component of path and appends | |
1175 | * filename, unless the latter is absolute anyway or the | |
1176 | * former isn't */ | |
1177 | ||
1178 | if (path_is_absolute(filename)) | |
1179 | return strdup(filename); | |
1180 | ||
ebd93cb6 LP |
1181 | e = strrchr(path, '/'); |
1182 | if (!e) | |
4a72ff34 LP |
1183 | return strdup(filename); |
1184 | ||
1185 | k = strlen(filename); | |
ebd93cb6 LP |
1186 | ret = new(char, (e + 1 - path) + k + 1); |
1187 | if (!ret) | |
4a72ff34 LP |
1188 | return NULL; |
1189 | ||
ebd93cb6 LP |
1190 | memcpy(mempcpy(ret, path, e + 1 - path), filename, k + 1); |
1191 | return ret; | |
4a72ff34 | 1192 | } |
fb624d04 | 1193 | |
c32dd69b LP |
1194 | int rmdir_parents(const char *path, const char *stop) { |
1195 | size_t l; | |
1196 | int r = 0; | |
1197 | ||
1198 | assert(path); | |
1199 | assert(stop); | |
1200 | ||
1201 | l = strlen(path); | |
1202 | ||
1203 | /* Skip trailing slashes */ | |
1204 | while (l > 0 && path[l-1] == '/') | |
1205 | l--; | |
1206 | ||
1207 | while (l > 0) { | |
1208 | char *t; | |
1209 | ||
1210 | /* Skip last component */ | |
1211 | while (l > 0 && path[l-1] != '/') | |
1212 | l--; | |
1213 | ||
1214 | /* Skip trailing slashes */ | |
1215 | while (l > 0 && path[l-1] == '/') | |
1216 | l--; | |
1217 | ||
1218 | if (l <= 0) | |
1219 | break; | |
1220 | ||
1221 | if (!(t = strndup(path, l))) | |
1222 | return -ENOMEM; | |
1223 | ||
1224 | if (path_startswith(stop, t)) { | |
1225 | free(t); | |
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | r = rmdir(t); | |
1230 | free(t); | |
1231 | ||
1232 | if (r < 0) | |
1233 | if (errno != ENOENT) | |
1234 | return -errno; | |
1235 | } | |
1236 | ||
1237 | return 0; | |
1238 | } | |
1239 | ||
fb624d04 LP |
1240 | char hexchar(int x) { |
1241 | static const char table[16] = "0123456789abcdef"; | |
1242 | ||
1243 | return table[x & 15]; | |
1244 | } | |
4fe88d28 LP |
1245 | |
1246 | int unhexchar(char c) { | |
1247 | ||
1248 | if (c >= '0' && c <= '9') | |
1249 | return c - '0'; | |
1250 | ||
1251 | if (c >= 'a' && c <= 'f') | |
ea430986 | 1252 | return c - 'a' + 10; |
4fe88d28 LP |
1253 | |
1254 | if (c >= 'A' && c <= 'F') | |
ea430986 | 1255 | return c - 'A' + 10; |
4fe88d28 | 1256 | |
7e8185ef | 1257 | return -EINVAL; |
4fe88d28 LP |
1258 | } |
1259 | ||
66e35261 LP |
1260 | char *hexmem(const void *p, size_t l) { |
1261 | char *r, *z; | |
1262 | const uint8_t *x; | |
1263 | ||
1264 | z = r = malloc(l * 2 + 1); | |
1265 | if (!r) | |
1266 | return NULL; | |
1267 | ||
1268 | for (x = p; x < (const uint8_t*) p + l; x++) { | |
1269 | *(z++) = hexchar(*x >> 4); | |
1270 | *(z++) = hexchar(*x & 15); | |
1271 | } | |
1272 | ||
1273 | *z = 0; | |
1274 | return r; | |
1275 | } | |
1276 | ||
2181a7f5 LP |
1277 | void *unhexmem(const char *p, size_t l) { |
1278 | uint8_t *r, *z; | |
1279 | const char *x; | |
1280 | ||
1281 | assert(p); | |
1282 | ||
1283 | z = r = malloc((l + 1) / 2 + 1); | |
1284 | if (!r) | |
1285 | return NULL; | |
1286 | ||
1287 | for (x = p; x < p + l; x += 2) { | |
1288 | int a, b; | |
1289 | ||
1290 | a = unhexchar(x[0]); | |
1291 | if (x+1 < p + l) | |
1292 | b = unhexchar(x[1]); | |
1293 | else | |
1294 | b = 0; | |
1295 | ||
1296 | *(z++) = (uint8_t) a << 4 | (uint8_t) b; | |
1297 | } | |
1298 | ||
1299 | *z = 0; | |
1300 | return r; | |
1301 | } | |
1302 | ||
4fe88d28 LP |
1303 | char octchar(int x) { |
1304 | return '0' + (x & 7); | |
1305 | } | |
1306 | ||
1307 | int unoctchar(char c) { | |
1308 | ||
1309 | if (c >= '0' && c <= '7') | |
1310 | return c - '0'; | |
1311 | ||
7e8185ef | 1312 | return -EINVAL; |
4fe88d28 LP |
1313 | } |
1314 | ||
5af98f82 LP |
1315 | char decchar(int x) { |
1316 | return '0' + (x % 10); | |
1317 | } | |
1318 | ||
1319 | int undecchar(char c) { | |
1320 | ||
1321 | if (c >= '0' && c <= '9') | |
1322 | return c - '0'; | |
1323 | ||
7e8185ef | 1324 | return -EINVAL; |
5af98f82 LP |
1325 | } |
1326 | ||
4fe88d28 LP |
1327 | char *cescape(const char *s) { |
1328 | char *r, *t; | |
1329 | const char *f; | |
1330 | ||
1331 | assert(s); | |
1332 | ||
1333 | /* Does C style string escaping. */ | |
1334 | ||
f8e2fb7b LP |
1335 | r = new(char, strlen(s)*4 + 1); |
1336 | if (!r) | |
4fe88d28 LP |
1337 | return NULL; |
1338 | ||
1339 | for (f = s, t = r; *f; f++) | |
c593bb36 | 1340 | t += cescape_char(*f, t); |
4fe88d28 LP |
1341 | |
1342 | *t = 0; | |
1343 | ||
1344 | return r; | |
1345 | } | |
1346 | ||
5b4c61cd | 1347 | char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) { |
4fe88d28 LP |
1348 | char *r, *t; |
1349 | const char *f; | |
5b4c61cd | 1350 | size_t pl; |
4fe88d28 LP |
1351 | |
1352 | assert(s); | |
1353 | ||
5b4c61cd LP |
1354 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1355 | ||
1356 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1357 | |
5b4c61cd | 1358 | r = new(char, pl+length+1); |
7f110ff9 | 1359 | if (!r) |
1e2fd62d | 1360 | return NULL; |
4fe88d28 | 1361 | |
5b4c61cd LP |
1362 | if (prefix) |
1363 | memcpy(r, prefix, pl); | |
1364 | ||
1365 | for (f = s, t = r + pl; f < s + length; f++) { | |
7f769619 ZJS |
1366 | size_t remaining = s + length - f; |
1367 | assert(remaining > 0); | |
4fe88d28 | 1368 | |
7f769619 | 1369 | if (*f != '\\') { /* a literal literal */ |
4fe88d28 LP |
1370 | *(t++) = *f; |
1371 | continue; | |
1372 | } | |
1373 | ||
7f769619 ZJS |
1374 | if (--remaining == 0) { /* copy trailing backslash verbatim */ |
1375 | *(t++) = *f; | |
1376 | break; | |
1377 | } | |
1378 | ||
4fe88d28 LP |
1379 | f++; |
1380 | ||
1381 | switch (*f) { | |
1382 | ||
1383 | case 'a': | |
1384 | *(t++) = '\a'; | |
1385 | break; | |
1386 | case 'b': | |
1387 | *(t++) = '\b'; | |
1388 | break; | |
1389 | case 'f': | |
1390 | *(t++) = '\f'; | |
1391 | break; | |
1392 | case 'n': | |
1393 | *(t++) = '\n'; | |
1394 | break; | |
1395 | case 'r': | |
1396 | *(t++) = '\r'; | |
1397 | break; | |
1398 | case 't': | |
1399 | *(t++) = '\t'; | |
1400 | break; | |
1401 | case 'v': | |
1402 | *(t++) = '\v'; | |
1403 | break; | |
1404 | case '\\': | |
1405 | *(t++) = '\\'; | |
1406 | break; | |
1407 | case '"': | |
1408 | *(t++) = '"'; | |
1409 | break; | |
1410 | case '\'': | |
1411 | *(t++) = '\''; | |
1412 | break; | |
1413 | ||
e167fb86 LP |
1414 | case 's': |
1415 | /* This is an extension of the XDG syntax files */ | |
1416 | *(t++) = ' '; | |
1417 | break; | |
1418 | ||
4fe88d28 LP |
1419 | case 'x': { |
1420 | /* hexadecimal encoding */ | |
7f769619 | 1421 | int a = -1, b = -1; |
4fe88d28 | 1422 | |
7f769619 ZJS |
1423 | if (remaining >= 2) { |
1424 | a = unhexchar(f[1]); | |
1425 | b = unhexchar(f[2]); | |
1426 | } | |
7f110ff9 | 1427 | |
e0a33e7b | 1428 | if (a < 0 || b < 0 || (a == 0 && b == 0)) { |
4fe88d28 LP |
1429 | /* Invalid escape code, let's take it literal then */ |
1430 | *(t++) = '\\'; | |
1431 | *(t++) = 'x'; | |
1432 | } else { | |
1433 | *(t++) = (char) ((a << 4) | b); | |
1434 | f += 2; | |
1435 | } | |
1436 | ||
1437 | break; | |
1438 | } | |
1439 | ||
1440 | case '0': | |
1441 | case '1': | |
1442 | case '2': | |
1443 | case '3': | |
1444 | case '4': | |
1445 | case '5': | |
1446 | case '6': | |
1447 | case '7': { | |
1448 | /* octal encoding */ | |
7f769619 | 1449 | int a = -1, b = -1, c = -1; |
4fe88d28 | 1450 | |
7f769619 ZJS |
1451 | if (remaining >= 3) { |
1452 | a = unoctchar(f[0]); | |
1453 | b = unoctchar(f[1]); | |
1454 | c = unoctchar(f[2]); | |
1455 | } | |
7f110ff9 | 1456 | |
e0a33e7b | 1457 | if (a < 0 || b < 0 || c < 0 || (a == 0 && b == 0 && c == 0)) { |
4fe88d28 LP |
1458 | /* Invalid escape code, let's take it literal then */ |
1459 | *(t++) = '\\'; | |
1460 | *(t++) = f[0]; | |
1461 | } else { | |
1462 | *(t++) = (char) ((a << 6) | (b << 3) | c); | |
1463 | f += 2; | |
1464 | } | |
1465 | ||
1466 | break; | |
1467 | } | |
1468 | ||
4fe88d28 LP |
1469 | default: |
1470 | /* Invalid escape code, let's take it literal then */ | |
1471 | *(t++) = '\\'; | |
f3d4cc01 | 1472 | *(t++) = *f; |
4fe88d28 LP |
1473 | break; |
1474 | } | |
1475 | } | |
1476 | ||
4fe88d28 LP |
1477 | *t = 0; |
1478 | return r; | |
1479 | } | |
1480 | ||
5b4c61cd LP |
1481 | char *cunescape_length(const char *s, size_t length) { |
1482 | return cunescape_length_with_prefix(s, length, NULL); | |
1483 | } | |
1484 | ||
6febfd0d | 1485 | char *cunescape(const char *s) { |
5b4c61cd LP |
1486 | assert(s); |
1487 | ||
6febfd0d LP |
1488 | return cunescape_length(s, strlen(s)); |
1489 | } | |
4fe88d28 LP |
1490 | |
1491 | char *xescape(const char *s, const char *bad) { | |
1492 | char *r, *t; | |
1493 | const char *f; | |
1494 | ||
1495 | /* Escapes all chars in bad, in addition to \ and all special | |
1496 | * chars, in \xFF style escaping. May be reversed with | |
1497 | * cunescape. */ | |
1498 | ||
08ace05b LP |
1499 | r = new(char, strlen(s) * 4 + 1); |
1500 | if (!r) | |
4fe88d28 LP |
1501 | return NULL; |
1502 | ||
1503 | for (f = s, t = r; *f; f++) { | |
1504 | ||
b866264a LP |
1505 | if ((*f < ' ') || (*f >= 127) || |
1506 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1507 | *(t++) = '\\'; |
1508 | *(t++) = 'x'; | |
1509 | *(t++) = hexchar(*f >> 4); | |
1510 | *(t++) = hexchar(*f); | |
1511 | } else | |
1512 | *(t++) = *f; | |
1513 | } | |
1514 | ||
1515 | *t = 0; | |
1516 | ||
1517 | return r; | |
1518 | } | |
1519 | ||
67d51650 | 1520 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1521 | char *p; |
1522 | ||
67d51650 | 1523 | assert(t); |
4fe88d28 | 1524 | |
67d51650 | 1525 | for (p = t; *p; p++) |
4fe88d28 LP |
1526 | if (*p >= 'A' && *p <= 'Z') |
1527 | *p = *p - 'A' + 'a'; | |
1528 | ||
67d51650 | 1529 | return t; |
4fe88d28 | 1530 | } |
1dccbe19 | 1531 | |
a34bf9db | 1532 | _pure_ static bool hidden_file_allow_backup(const char *filename) { |
c85dc17b LP |
1533 | assert(filename); |
1534 | ||
1535 | return | |
1536 | filename[0] == '.' || | |
6c78be3c | 1537 | streq(filename, "lost+found") || |
e472d476 LP |
1538 | streq(filename, "aquota.user") || |
1539 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1540 | endswith(filename, ".rpmnew") || |
1541 | endswith(filename, ".rpmsave") || | |
1542 | endswith(filename, ".rpmorig") || | |
1543 | endswith(filename, ".dpkg-old") || | |
1544 | endswith(filename, ".dpkg-new") || | |
0cdfd26e | 1545 | endswith(filename, ".dpkg-tmp") || |
c7088e49 MP |
1546 | endswith(filename, ".dpkg-dist") || |
1547 | endswith(filename, ".dpkg-bak") || | |
1548 | endswith(filename, ".dpkg-backup") || | |
1549 | endswith(filename, ".dpkg-remove") || | |
c85dc17b LP |
1550 | endswith(filename, ".swp"); |
1551 | } | |
1552 | ||
a34bf9db | 1553 | bool hidden_file(const char *filename) { |
a228a22f LP |
1554 | assert(filename); |
1555 | ||
1556 | if (endswith(filename, "~")) | |
93f1a063 | 1557 | return true; |
a228a22f | 1558 | |
a34bf9db | 1559 | return hidden_file_allow_backup(filename); |
a228a22f LP |
1560 | } |
1561 | ||
3a0ecb08 | 1562 | int fd_nonblock(int fd, bool nonblock) { |
be8f4e9e | 1563 | int flags, nflags; |
3a0ecb08 LP |
1564 | |
1565 | assert(fd >= 0); | |
1566 | ||
be8f4e9e LP |
1567 | flags = fcntl(fd, F_GETFL, 0); |
1568 | if (flags < 0) | |
3a0ecb08 LP |
1569 | return -errno; |
1570 | ||
1571 | if (nonblock) | |
be8f4e9e | 1572 | nflags = flags | O_NONBLOCK; |
3a0ecb08 | 1573 | else |
be8f4e9e LP |
1574 | nflags = flags & ~O_NONBLOCK; |
1575 | ||
1576 | if (nflags == flags) | |
1577 | return 0; | |
3a0ecb08 | 1578 | |
34b42c96 | 1579 | if (fcntl(fd, F_SETFL, nflags) < 0) |
3a0ecb08 LP |
1580 | return -errno; |
1581 | ||
1582 | return 0; | |
1583 | } | |
1584 | ||
1585 | int fd_cloexec(int fd, bool cloexec) { | |
be8f4e9e | 1586 | int flags, nflags; |
3a0ecb08 LP |
1587 | |
1588 | assert(fd >= 0); | |
1589 | ||
be8f4e9e LP |
1590 | flags = fcntl(fd, F_GETFD, 0); |
1591 | if (flags < 0) | |
3a0ecb08 LP |
1592 | return -errno; |
1593 | ||
1594 | if (cloexec) | |
be8f4e9e | 1595 | nflags = flags | FD_CLOEXEC; |
3a0ecb08 | 1596 | else |
be8f4e9e LP |
1597 | nflags = flags & ~FD_CLOEXEC; |
1598 | ||
1599 | if (nflags == flags) | |
1600 | return 0; | |
3a0ecb08 | 1601 | |
34b42c96 | 1602 | if (fcntl(fd, F_SETFD, nflags) < 0) |
3a0ecb08 LP |
1603 | return -errno; |
1604 | ||
1605 | return 0; | |
1606 | } | |
1607 | ||
44a6b1b6 | 1608 | _pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
b19be9eb LP |
1609 | unsigned i; |
1610 | ||
1611 | assert(n_fdset == 0 || fdset); | |
1612 | ||
1613 | for (i = 0; i < n_fdset; i++) | |
1614 | if (fdset[i] == fd) | |
1615 | return true; | |
1616 | ||
1617 | return false; | |
1618 | } | |
1619 | ||
a0d40ac5 | 1620 | int close_all_fds(const int except[], unsigned n_except) { |
e1d75803 | 1621 | _cleanup_closedir_ DIR *d = NULL; |
a0d40ac5 LP |
1622 | struct dirent *de; |
1623 | int r = 0; | |
1624 | ||
b19be9eb LP |
1625 | assert(n_except == 0 || except); |
1626 | ||
1627 | d = opendir("/proc/self/fd"); | |
1628 | if (!d) { | |
1629 | int fd; | |
1630 | struct rlimit rl; | |
1631 | ||
1632 | /* When /proc isn't available (for example in chroots) | |
1633 | * the fallback is brute forcing through the fd | |
1634 | * table */ | |
1635 | ||
1636 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1637 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1638 | ||
1639 | if (fd_in_set(fd, except, n_except)) | |
1640 | continue; | |
1641 | ||
1642 | if (close_nointr(fd) < 0) | |
1643 | if (errno != EBADF && r == 0) | |
1644 | r = -errno; | |
1645 | } | |
1646 | ||
1647 | return r; | |
1648 | } | |
a0d40ac5 LP |
1649 | |
1650 | while ((de = readdir(d))) { | |
a7610064 | 1651 | int fd = -1; |
a0d40ac5 | 1652 | |
a34bf9db | 1653 | if (hidden_file(de->d_name)) |
a0d40ac5 LP |
1654 | continue; |
1655 | ||
720ce21d LP |
1656 | if (safe_atoi(de->d_name, &fd) < 0) |
1657 | /* Let's better ignore this, just in case */ | |
1658 | continue; | |
a0d40ac5 LP |
1659 | |
1660 | if (fd < 3) | |
1661 | continue; | |
1662 | ||
1663 | if (fd == dirfd(d)) | |
1664 | continue; | |
1665 | ||
b19be9eb LP |
1666 | if (fd_in_set(fd, except, n_except)) |
1667 | continue; | |
a0d40ac5 | 1668 | |
720ce21d | 1669 | if (close_nointr(fd) < 0) { |
2f357920 | 1670 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1671 | if (errno != EBADF && r == 0) |
1672 | r = -errno; | |
2f357920 | 1673 | } |
a0d40ac5 LP |
1674 | } |
1675 | ||
a0d40ac5 LP |
1676 | return r; |
1677 | } | |
1678 | ||
db12775d LP |
1679 | bool chars_intersect(const char *a, const char *b) { |
1680 | const char *p; | |
1681 | ||
1682 | /* Returns true if any of the chars in a are in b. */ | |
1683 | for (p = a; *p; p++) | |
1684 | if (strchr(b, *p)) | |
1685 | return true; | |
1686 | ||
1687 | return false; | |
1688 | } | |
1689 | ||
42856c10 | 1690 | bool fstype_is_network(const char *fstype) { |
a05f97b3 | 1691 | static const char table[] = |
ba89821c | 1692 | "afs\0" |
a05f97b3 LP |
1693 | "cifs\0" |
1694 | "smbfs\0" | |
da92ca5e | 1695 | "sshfs\0" |
a05f97b3 | 1696 | "ncpfs\0" |
dac70dc7 | 1697 | "ncp\0" |
a05f97b3 LP |
1698 | "nfs\0" |
1699 | "nfs4\0" | |
1700 | "gfs\0" | |
67608cad LP |
1701 | "gfs2\0" |
1702 | "glusterfs\0"; | |
1703 | ||
1704 | const char *x; | |
1705 | ||
1706 | x = startswith(fstype, "fuse."); | |
1707 | if (x) | |
1708 | fstype = x; | |
42856c10 | 1709 | |
a05f97b3 | 1710 | return nulstr_contains(table, fstype); |
42856c10 LP |
1711 | } |
1712 | ||
601f6a1e | 1713 | int chvt(int vt) { |
a05f97b3 | 1714 | _cleanup_close_ int fd; |
601f6a1e | 1715 | |
a05f97b3 LP |
1716 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
1717 | if (fd < 0) | |
601f6a1e LP |
1718 | return -errno; |
1719 | ||
1720 | if (vt < 0) { | |
1721 | int tiocl[2] = { | |
1722 | TIOCL_GETKMSGREDIRECT, | |
1723 | 0 | |
1724 | }; | |
1725 | ||
a05f97b3 LP |
1726 | if (ioctl(fd, TIOCLINUX, tiocl) < 0) |
1727 | return -errno; | |
601f6a1e LP |
1728 | |
1729 | vt = tiocl[0] <= 0 ? 1 : tiocl[0]; | |
1730 | } | |
1731 | ||
1732 | if (ioctl(fd, VT_ACTIVATE, vt) < 0) | |
a05f97b3 | 1733 | return -errno; |
601f6a1e | 1734 | |
a05f97b3 | 1735 | return 0; |
601f6a1e LP |
1736 | } |
1737 | ||
8f2d43a0 | 1738 | int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) { |
80876c20 | 1739 | struct termios old_termios, new_termios; |
e0a33e7b | 1740 | char c, line[LINE_MAX]; |
80876c20 LP |
1741 | |
1742 | assert(f); | |
1743 | assert(ret); | |
1744 | ||
1745 | if (tcgetattr(fileno(f), &old_termios) >= 0) { | |
1746 | new_termios = old_termios; | |
1747 | ||
1748 | new_termios.c_lflag &= ~ICANON; | |
1749 | new_termios.c_cc[VMIN] = 1; | |
1750 | new_termios.c_cc[VTIME] = 0; | |
1751 | ||
1752 | if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) { | |
1753 | size_t k; | |
1754 | ||
3a43da28 | 1755 | if (t != USEC_INFINITY) { |
8f2d43a0 LP |
1756 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) { |
1757 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1758 | return -ETIMEDOUT; | |
1759 | } | |
1760 | } | |
1761 | ||
80876c20 LP |
1762 | k = fread(&c, 1, 1, f); |
1763 | ||
1764 | tcsetattr(fileno(f), TCSADRAIN, &old_termios); | |
1765 | ||
1766 | if (k <= 0) | |
1767 | return -EIO; | |
1768 | ||
1769 | if (need_nl) | |
1770 | *need_nl = c != '\n'; | |
1771 | ||
1772 | *ret = c; | |
1773 | return 0; | |
1774 | } | |
1775 | } | |
1776 | ||
3a43da28 | 1777 | if (t != USEC_INFINITY) { |
8f2d43a0 LP |
1778 | if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) |
1779 | return -ETIMEDOUT; | |
e0a33e7b | 1780 | } |
8f2d43a0 | 1781 | |
3a8a9163 | 1782 | errno = 0; |
8f2d43a0 | 1783 | if (!fgets(line, sizeof(line), f)) |
3a8a9163 | 1784 | return errno ? -errno : -EIO; |
80876c20 LP |
1785 | |
1786 | truncate_nl(line); | |
1787 | ||
1788 | if (strlen(line) != 1) | |
1789 | return -EBADMSG; | |
1790 | ||
1791 | if (need_nl) | |
1792 | *need_nl = false; | |
1793 | ||
1794 | *ret = line[0]; | |
1795 | return 0; | |
1796 | } | |
1797 | ||
418b9be5 | 1798 | int ask_char(char *ret, const char *replies, const char *text, ...) { |
e0a33e7b | 1799 | int r; |
1b39d4b9 | 1800 | |
80876c20 LP |
1801 | assert(ret); |
1802 | assert(replies); | |
1803 | assert(text); | |
1804 | ||
1805 | for (;;) { | |
1806 | va_list ap; | |
1807 | char c; | |
80876c20 LP |
1808 | bool need_nl = true; |
1809 | ||
8481248b | 1810 | if (on_tty()) |
c1072ea0 | 1811 | fputs(ANSI_HIGHLIGHT_ON, stdout); |
b1b2dc0c | 1812 | |
80876c20 LP |
1813 | va_start(ap, text); |
1814 | vprintf(text, ap); | |
1815 | va_end(ap); | |
1816 | ||
8481248b | 1817 | if (on_tty()) |
c1072ea0 | 1818 | fputs(ANSI_HIGHLIGHT_OFF, stdout); |
b1b2dc0c | 1819 | |
80876c20 LP |
1820 | fflush(stdout); |
1821 | ||
3a43da28 | 1822 | r = read_one_char(stdin, &c, USEC_INFINITY, &need_nl); |
8f2d43a0 | 1823 | if (r < 0) { |
80876c20 LP |
1824 | |
1825 | if (r == -EBADMSG) { | |
1826 | puts("Bad input, please try again."); | |
1827 | continue; | |
1828 | } | |
1829 | ||
1830 | putchar('\n'); | |
1831 | return r; | |
1832 | } | |
1833 | ||
1834 | if (need_nl) | |
1835 | putchar('\n'); | |
1836 | ||
1837 | if (strchr(replies, c)) { | |
1838 | *ret = c; | |
1839 | return 0; | |
1840 | } | |
1841 | ||
1842 | puts("Read unexpected character, please try again."); | |
1843 | } | |
1844 | } | |
1845 | ||
418b9be5 LP |
1846 | int ask_string(char **ret, const char *text, ...) { |
1847 | assert(ret); | |
1848 | assert(text); | |
1849 | ||
1850 | for (;;) { | |
1851 | char line[LINE_MAX]; | |
1852 | va_list ap; | |
1853 | ||
1854 | if (on_tty()) | |
1855 | fputs(ANSI_HIGHLIGHT_ON, stdout); | |
1856 | ||
1857 | va_start(ap, text); | |
1858 | vprintf(text, ap); | |
1859 | va_end(ap); | |
1860 | ||
1861 | if (on_tty()) | |
1862 | fputs(ANSI_HIGHLIGHT_OFF, stdout); | |
1863 | ||
1864 | fflush(stdout); | |
1865 | ||
1866 | errno = 0; | |
1867 | if (!fgets(line, sizeof(line), stdin)) | |
1868 | return errno ? -errno : -EIO; | |
1869 | ||
1870 | if (!endswith(line, "\n")) | |
1871 | putchar('\n'); | |
1872 | else { | |
1873 | char *s; | |
1874 | ||
1875 | if (isempty(line)) | |
1876 | continue; | |
1877 | ||
1878 | truncate_nl(line); | |
1879 | s = strdup(line); | |
1880 | if (!s) | |
1881 | return -ENOMEM; | |
1882 | ||
1883 | *ret = s; | |
1884 | return 0; | |
1885 | } | |
1886 | } | |
1887 | } | |
1888 | ||
512947d4 | 1889 | int reset_terminal_fd(int fd, bool switch_to_text) { |
80876c20 LP |
1890 | struct termios termios; |
1891 | int r = 0; | |
3fe5e5d4 LP |
1892 | |
1893 | /* Set terminal to some sane defaults */ | |
80876c20 LP |
1894 | |
1895 | assert(fd >= 0); | |
1896 | ||
eed1d0e3 LP |
1897 | /* We leave locked terminal attributes untouched, so that |
1898 | * Plymouth may set whatever it wants to set, and we don't | |
1899 | * interfere with that. */ | |
3fe5e5d4 LP |
1900 | |
1901 | /* Disable exclusive mode, just in case */ | |
1902 | ioctl(fd, TIOCNXCL); | |
1903 | ||
5c0100a5 | 1904 | /* Switch to text mode */ |
512947d4 MS |
1905 | if (switch_to_text) |
1906 | ioctl(fd, KDSETMODE, KD_TEXT); | |
5c0100a5 | 1907 | |
3fe5e5d4 | 1908 | /* Enable console unicode mode */ |
df465b3f | 1909 | ioctl(fd, KDSKBMODE, K_UNICODE); |
80876c20 LP |
1910 | |
1911 | if (tcgetattr(fd, &termios) < 0) { | |
1912 | r = -errno; | |
1913 | goto finish; | |
1914 | } | |
1915 | ||
aaf694ca LP |
1916 | /* We only reset the stuff that matters to the software. How |
1917 | * hardware is set up we don't touch assuming that somebody | |
1918 | * else will do that for us */ | |
1919 | ||
1920 | termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC); | |
80876c20 LP |
1921 | termios.c_iflag |= ICRNL | IMAXBEL | IUTF8; |
1922 | termios.c_oflag |= ONLCR; | |
1923 | termios.c_cflag |= CREAD; | |
1924 | termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE; | |
1925 | ||
1926 | termios.c_cc[VINTR] = 03; /* ^C */ | |
1927 | termios.c_cc[VQUIT] = 034; /* ^\ */ | |
1928 | termios.c_cc[VERASE] = 0177; | |
1929 | termios.c_cc[VKILL] = 025; /* ^X */ | |
1930 | termios.c_cc[VEOF] = 04; /* ^D */ | |
1931 | termios.c_cc[VSTART] = 021; /* ^Q */ | |
1932 | termios.c_cc[VSTOP] = 023; /* ^S */ | |
1933 | termios.c_cc[VSUSP] = 032; /* ^Z */ | |
1934 | termios.c_cc[VLNEXT] = 026; /* ^V */ | |
1935 | termios.c_cc[VWERASE] = 027; /* ^W */ | |
1936 | termios.c_cc[VREPRINT] = 022; /* ^R */ | |
aaf694ca LP |
1937 | termios.c_cc[VEOL] = 0; |
1938 | termios.c_cc[VEOL2] = 0; | |
80876c20 LP |
1939 | |
1940 | termios.c_cc[VTIME] = 0; | |
1941 | termios.c_cc[VMIN] = 1; | |
1942 | ||
1943 | if (tcsetattr(fd, TCSANOW, &termios) < 0) | |
1944 | r = -errno; | |
1945 | ||
1946 | finish: | |
1947 | /* Just in case, flush all crap out */ | |
1948 | tcflush(fd, TCIOFLUSH); | |
1949 | ||
1950 | return r; | |
1951 | } | |
1952 | ||
6ea832a2 | 1953 | int reset_terminal(const char *name) { |
03e334a1 | 1954 | _cleanup_close_ int fd = -1; |
6ea832a2 LP |
1955 | |
1956 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
1957 | if (fd < 0) | |
1958 | return fd; | |
1959 | ||
03e334a1 | 1960 | return reset_terminal_fd(fd, true); |
6ea832a2 LP |
1961 | } |
1962 | ||
80876c20 LP |
1963 | int open_terminal(const char *name, int mode) { |
1964 | int fd, r; | |
f73f76ac | 1965 | unsigned c = 0; |
80876c20 | 1966 | |
f73f76ac LP |
1967 | /* |
1968 | * If a TTY is in the process of being closed opening it might | |
1969 | * cause EIO. This is horribly awful, but unlikely to be | |
1970 | * changed in the kernel. Hence we work around this problem by | |
1971 | * retrying a couple of times. | |
1972 | * | |
1973 | * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245 | |
1974 | */ | |
1975 | ||
dd94c17e LP |
1976 | assert(!(mode & O_CREAT)); |
1977 | ||
f73f76ac | 1978 | for (;;) { |
dd94c17e | 1979 | fd = open(name, mode, 0); |
af6da548 | 1980 | if (fd >= 0) |
f73f76ac LP |
1981 | break; |
1982 | ||
1983 | if (errno != EIO) | |
1984 | return -errno; | |
1985 | ||
af6da548 | 1986 | /* Max 1s in total */ |
f73f76ac LP |
1987 | if (c >= 20) |
1988 | return -errno; | |
1989 | ||
1990 | usleep(50 * USEC_PER_MSEC); | |
1991 | c++; | |
1992 | } | |
1993 | ||
af6da548 LP |
1994 | r = isatty(fd); |
1995 | if (r < 0) { | |
03e334a1 | 1996 | safe_close(fd); |
80876c20 LP |
1997 | return -errno; |
1998 | } | |
1999 | ||
2000 | if (!r) { | |
03e334a1 | 2001 | safe_close(fd); |
80876c20 LP |
2002 | return -ENOTTY; |
2003 | } | |
2004 | ||
2005 | return fd; | |
2006 | } | |
2007 | ||
2008 | int flush_fd(int fd) { | |
b92bea5d ZJS |
2009 | struct pollfd pollfd = { |
2010 | .fd = fd, | |
2011 | .events = POLLIN, | |
2012 | }; | |
80876c20 LP |
2013 | |
2014 | for (;;) { | |
20c03b7b | 2015 | char buf[LINE_MAX]; |
80876c20 LP |
2016 | ssize_t l; |
2017 | int r; | |
2018 | ||
e62d8c39 ZJS |
2019 | r = poll(&pollfd, 1, 0); |
2020 | if (r < 0) { | |
80876c20 LP |
2021 | if (errno == EINTR) |
2022 | continue; | |
2023 | ||
2024 | return -errno; | |
80876c20 | 2025 | |
e62d8c39 | 2026 | } else if (r == 0) |
80876c20 LP |
2027 | return 0; |
2028 | ||
e62d8c39 ZJS |
2029 | l = read(fd, buf, sizeof(buf)); |
2030 | if (l < 0) { | |
80876c20 LP |
2031 | |
2032 | if (errno == EINTR) | |
2033 | continue; | |
2034 | ||
2035 | if (errno == EAGAIN) | |
2036 | return 0; | |
2037 | ||
2038 | return -errno; | |
e62d8c39 | 2039 | } else if (l == 0) |
80876c20 LP |
2040 | return 0; |
2041 | } | |
2042 | } | |
2043 | ||
af6da548 LP |
2044 | int acquire_terminal( |
2045 | const char *name, | |
2046 | bool fail, | |
2047 | bool force, | |
2048 | bool ignore_tiocstty_eperm, | |
2049 | usec_t timeout) { | |
2050 | ||
4a0ff478 | 2051 | int fd = -1, notify = -1, r = 0, wd = -1; |
af6da548 | 2052 | usec_t ts = 0; |
80876c20 LP |
2053 | |
2054 | assert(name); | |
2055 | ||
2056 | /* We use inotify to be notified when the tty is closed. We | |
2057 | * create the watch before checking if we can actually acquire | |
2058 | * it, so that we don't lose any event. | |
2059 | * | |
2060 | * Note: strictly speaking this actually watches for the | |
2061 | * device being closed, it does *not* really watch whether a | |
2062 | * tty loses its controlling process. However, unless some | |
2063 | * rogue process uses TIOCNOTTY on /dev/tty *after* closing | |
2064 | * its tty otherwise this will not become a problem. As long | |
2065 | * as the administrator makes sure not configure any service | |
2066 | * on the same tty as an untrusted user this should not be a | |
2067 | * problem. (Which he probably should not do anyway.) */ | |
2068 | ||
3a43da28 | 2069 | if (timeout != USEC_INFINITY) |
af6da548 LP |
2070 | ts = now(CLOCK_MONOTONIC); |
2071 | ||
80876c20 | 2072 | if (!fail && !force) { |
3a43da28 | 2073 | notify = inotify_init1(IN_CLOEXEC | (timeout != USEC_INFINITY ? IN_NONBLOCK : 0)); |
af6da548 | 2074 | if (notify < 0) { |
80876c20 LP |
2075 | r = -errno; |
2076 | goto fail; | |
2077 | } | |
2078 | ||
af6da548 LP |
2079 | wd = inotify_add_watch(notify, name, IN_CLOSE); |
2080 | if (wd < 0) { | |
80876c20 LP |
2081 | r = -errno; |
2082 | goto fail; | |
2083 | } | |
2084 | } | |
2085 | ||
2086 | for (;;) { | |
b92bea5d ZJS |
2087 | struct sigaction sa_old, sa_new = { |
2088 | .sa_handler = SIG_IGN, | |
2089 | .sa_flags = SA_RESTART, | |
2090 | }; | |
2091 | ||
af6da548 LP |
2092 | if (notify >= 0) { |
2093 | r = flush_fd(notify); | |
2094 | if (r < 0) | |
e3d1855b | 2095 | goto fail; |
af6da548 | 2096 | } |
80876c20 LP |
2097 | |
2098 | /* We pass here O_NOCTTY only so that we can check the return | |
2099 | * value TIOCSCTTY and have a reliable way to figure out if we | |
2100 | * successfully became the controlling process of the tty */ | |
af6da548 LP |
2101 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); |
2102 | if (fd < 0) | |
6ea832a2 | 2103 | return fd; |
80876c20 | 2104 | |
32c4bef8 LP |
2105 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2106 | * if we already own the tty. */ | |
32c4bef8 LP |
2107 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
2108 | ||
80876c20 | 2109 | /* First, try to get the tty */ |
32c4bef8 LP |
2110 | if (ioctl(fd, TIOCSCTTY, force) < 0) |
2111 | r = -errno; | |
2112 | ||
2113 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); | |
21de3988 LP |
2114 | |
2115 | /* Sometimes it makes sense to ignore TIOCSCTTY | |
2116 | * returning EPERM, i.e. when very likely we already | |
2117 | * are have this controlling terminal. */ | |
32c4bef8 | 2118 | if (r < 0 && r == -EPERM && ignore_tiocstty_eperm) |
21de3988 LP |
2119 | r = 0; |
2120 | ||
32c4bef8 | 2121 | if (r < 0 && (force || fail || r != -EPERM)) { |
80876c20 LP |
2122 | goto fail; |
2123 | } | |
2124 | ||
2125 | if (r >= 0) | |
2126 | break; | |
2127 | ||
2128 | assert(!fail); | |
2129 | assert(!force); | |
2130 | assert(notify >= 0); | |
2131 | ||
2132 | for (;;) { | |
0254e944 | 2133 | union inotify_event_buffer buffer; |
f601daa7 | 2134 | struct inotify_event *e; |
f7c1ad4f | 2135 | ssize_t l; |
80876c20 | 2136 | |
3a43da28 | 2137 | if (timeout != USEC_INFINITY) { |
af6da548 LP |
2138 | usec_t n; |
2139 | ||
2140 | n = now(CLOCK_MONOTONIC); | |
2141 | if (ts + timeout < n) { | |
2142 | r = -ETIMEDOUT; | |
2143 | goto fail; | |
2144 | } | |
2145 | ||
2146 | r = fd_wait_for_event(fd, POLLIN, ts + timeout - n); | |
2147 | if (r < 0) | |
2148 | goto fail; | |
2149 | ||
2150 | if (r == 0) { | |
2151 | r = -ETIMEDOUT; | |
2152 | goto fail; | |
2153 | } | |
2154 | } | |
2155 | ||
0254e944 | 2156 | l = read(notify, &buffer, sizeof(buffer)); |
af6da548 | 2157 | if (l < 0) { |
af6da548 | 2158 | if (errno == EINTR || errno == EAGAIN) |
f601daa7 LP |
2159 | continue; |
2160 | ||
2161 | r = -errno; | |
2162 | goto fail; | |
2163 | } | |
2164 | ||
f7c1ad4f | 2165 | FOREACH_INOTIFY_EVENT(e, buffer, l) { |
f601daa7 | 2166 | if (e->wd != wd || !(e->mask & IN_CLOSE)) { |
80876c20 | 2167 | r = -EIO; |
f601daa7 LP |
2168 | goto fail; |
2169 | } | |
80876c20 LP |
2170 | } |
2171 | ||
2172 | break; | |
2173 | } | |
2174 | ||
2175 | /* We close the tty fd here since if the old session | |
2176 | * ended our handle will be dead. It's important that | |
2177 | * we do this after sleeping, so that we don't enter | |
2178 | * an endless loop. */ | |
6f53e671 | 2179 | fd = safe_close(fd); |
80876c20 LP |
2180 | } |
2181 | ||
03e334a1 | 2182 | safe_close(notify); |
80876c20 | 2183 | |
512947d4 MS |
2184 | r = reset_terminal_fd(fd, true); |
2185 | if (r < 0) | |
da927ba9 | 2186 | log_warning_errno(r, "Failed to reset terminal: %m"); |
80876c20 LP |
2187 | |
2188 | return fd; | |
2189 | ||
2190 | fail: | |
03e334a1 LP |
2191 | safe_close(fd); |
2192 | safe_close(notify); | |
80876c20 LP |
2193 | |
2194 | return r; | |
2195 | } | |
2196 | ||
2197 | int release_terminal(void) { | |
56d96fc0 | 2198 | static const struct sigaction sa_new = { |
b92bea5d ZJS |
2199 | .sa_handler = SIG_IGN, |
2200 | .sa_flags = SA_RESTART, | |
2201 | }; | |
56d96fc0 LP |
2202 | |
2203 | _cleanup_close_ int fd = -1; | |
2204 | struct sigaction sa_old; | |
2205 | int r = 0; | |
80876c20 | 2206 | |
e62d8c39 ZJS |
2207 | fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC); |
2208 | if (fd < 0) | |
80876c20 LP |
2209 | return -errno; |
2210 | ||
57cd2192 LP |
2211 | /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed |
2212 | * by our own TIOCNOTTY */ | |
57cd2192 LP |
2213 | assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0); |
2214 | ||
80876c20 LP |
2215 | if (ioctl(fd, TIOCNOTTY) < 0) |
2216 | r = -errno; | |
2217 | ||
57cd2192 LP |
2218 | assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0); |
2219 | ||
80876c20 LP |
2220 | return r; |
2221 | } | |
2222 | ||
9a34ec5f LP |
2223 | int sigaction_many(const struct sigaction *sa, ...) { |
2224 | va_list ap; | |
2225 | int r = 0, sig; | |
2226 | ||
2227 | va_start(ap, sa); | |
2228 | while ((sig = va_arg(ap, int)) > 0) | |
2229 | if (sigaction(sig, sa, NULL) < 0) | |
2230 | r = -errno; | |
2231 | va_end(ap); | |
2232 | ||
2233 | return r; | |
2234 | } | |
2235 | ||
2236 | int ignore_signals(int sig, ...) { | |
b92bea5d ZJS |
2237 | struct sigaction sa = { |
2238 | .sa_handler = SIG_IGN, | |
2239 | .sa_flags = SA_RESTART, | |
2240 | }; | |
9a34ec5f LP |
2241 | va_list ap; |
2242 | int r = 0; | |
a337c6fc | 2243 | |
9a34ec5f LP |
2244 | if (sigaction(sig, &sa, NULL) < 0) |
2245 | r = -errno; | |
2246 | ||
2247 | va_start(ap, sig); | |
2248 | while ((sig = va_arg(ap, int)) > 0) | |
2249 | if (sigaction(sig, &sa, NULL) < 0) | |
2250 | r = -errno; | |
2251 | va_end(ap); | |
2252 | ||
2253 | return r; | |
2254 | } | |
2255 | ||
2256 | int default_signals(int sig, ...) { | |
b92bea5d ZJS |
2257 | struct sigaction sa = { |
2258 | .sa_handler = SIG_DFL, | |
2259 | .sa_flags = SA_RESTART, | |
2260 | }; | |
9a34ec5f LP |
2261 | va_list ap; |
2262 | int r = 0; | |
2263 | ||
9a34ec5f LP |
2264 | if (sigaction(sig, &sa, NULL) < 0) |
2265 | r = -errno; | |
2266 | ||
2267 | va_start(ap, sig); | |
2268 | while ((sig = va_arg(ap, int)) > 0) | |
2269 | if (sigaction(sig, &sa, NULL) < 0) | |
2270 | r = -errno; | |
2271 | va_end(ap); | |
2272 | ||
2273 | return r; | |
a337c6fc LP |
2274 | } |
2275 | ||
3d94f76c | 2276 | void safe_close_pair(int p[]) { |
8d567588 LP |
2277 | assert(p); |
2278 | ||
3d94f76c LP |
2279 | if (p[0] == p[1]) { |
2280 | /* Special case pairs which use the same fd in both | |
2281 | * directions... */ | |
2282 | p[0] = p[1] = safe_close(p[0]); | |
2283 | return; | |
8d567588 LP |
2284 | } |
2285 | ||
3d94f76c LP |
2286 | p[0] = safe_close(p[0]); |
2287 | p[1] = safe_close(p[1]); | |
8d567588 LP |
2288 | } |
2289 | ||
eb22ac37 | 2290 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2291 | uint8_t *p = buf; |
8d567588 LP |
2292 | ssize_t n = 0; |
2293 | ||
2294 | assert(fd >= 0); | |
2295 | assert(buf); | |
2296 | ||
8d567588 LP |
2297 | while (nbytes > 0) { |
2298 | ssize_t k; | |
2299 | ||
7d5dd5e0 | 2300 | k = read(fd, p, nbytes); |
6ce830fa LP |
2301 | if (k < 0) { |
2302 | if (errno == EINTR) | |
2303 | continue; | |
8d567588 | 2304 | |
6ce830fa | 2305 | if (errno == EAGAIN && do_poll) { |
8d567588 | 2306 | |
6ce830fa LP |
2307 | /* We knowingly ignore any return value here, |
2308 | * and expect that any error/EOF is reported | |
2309 | * via read() */ | |
8d567588 | 2310 | |
6ce830fa LP |
2311 | fd_wait_for_event(fd, POLLIN, USEC_INFINITY); |
2312 | continue; | |
2313 | } | |
2314 | ||
2315 | return n > 0 ? n : -errno; | |
7d5dd5e0 | 2316 | } |
8d567588 | 2317 | |
6ce830fa LP |
2318 | if (k == 0) |
2319 | return n; | |
8d567588 LP |
2320 | |
2321 | p += k; | |
2322 | nbytes -= k; | |
2323 | n += k; | |
2324 | } | |
2325 | ||
2326 | return n; | |
2327 | } | |
2328 | ||
553acb7b | 2329 | int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 2330 | const uint8_t *p = buf; |
eb22ac37 LP |
2331 | |
2332 | assert(fd >= 0); | |
2333 | assert(buf); | |
2334 | ||
553acb7b ZJS |
2335 | errno = 0; |
2336 | ||
eb22ac37 LP |
2337 | while (nbytes > 0) { |
2338 | ssize_t k; | |
2339 | ||
fe652127 | 2340 | k = write(fd, p, nbytes); |
6ce830fa LP |
2341 | if (k < 0) { |
2342 | if (errno == EINTR) | |
2343 | continue; | |
eb22ac37 | 2344 | |
6ce830fa LP |
2345 | if (errno == EAGAIN && do_poll) { |
2346 | /* We knowingly ignore any return value here, | |
2347 | * and expect that any error/EOF is reported | |
2348 | * via write() */ | |
eb22ac37 | 2349 | |
6ce830fa LP |
2350 | fd_wait_for_event(fd, POLLOUT, USEC_INFINITY); |
2351 | continue; | |
2352 | } | |
eb22ac37 | 2353 | |
6ce830fa | 2354 | return -errno; |
7d5dd5e0 | 2355 | } |
eb22ac37 | 2356 | |
6ce830fa LP |
2357 | if (k == 0) /* Can't really happen */ |
2358 | return -EIO; | |
eb22ac37 LP |
2359 | |
2360 | p += k; | |
2361 | nbytes -= k; | |
eb22ac37 LP |
2362 | } |
2363 | ||
553acb7b | 2364 | return 0; |
eb22ac37 LP |
2365 | } |
2366 | ||
5556b5fe LP |
2367 | int parse_size(const char *t, off_t base, off_t *size) { |
2368 | ||
2369 | /* Soo, sometimes we want to parse IEC binary suffxies, and | |
2370 | * sometimes SI decimal suffixes. This function can parse | |
2371 | * both. Which one is the right way depends on the | |
2372 | * context. Wikipedia suggests that SI is customary for | |
2373 | * hardrware metrics and network speeds, while IEC is | |
2374 | * customary for most data sizes used by software and volatile | |
2375 | * (RAM) memory. Hence be careful which one you pick! | |
2376 | * | |
2377 | * In either case we use just K, M, G as suffix, and not Ki, | |
2378 | * Mi, Gi or so (as IEC would suggest). That's because that's | |
2379 | * frickin' ugly. But this means you really need to make sure | |
2380 | * to document which base you are parsing when you use this | |
2381 | * call. */ | |
2382 | ||
2383 | struct table { | |
ab1f0633 | 2384 | const char *suffix; |
b32ff512 | 2385 | unsigned long long factor; |
5556b5fe LP |
2386 | }; |
2387 | ||
2388 | static const struct table iec[] = { | |
32895bb3 | 2389 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
840292be ZJS |
2390 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
2391 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
2392 | { "G", 1024ULL*1024ULL*1024ULL }, | |
2393 | { "M", 1024ULL*1024ULL }, | |
2394 | { "K", 1024ULL }, | |
2395 | { "B", 1 }, | |
ab1f0633 LP |
2396 | { "", 1 }, |
2397 | }; | |
2398 | ||
5556b5fe | 2399 | static const struct table si[] = { |
5556b5fe | 2400 | { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
840292be ZJS |
2401 | { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
2402 | { "T", 1000ULL*1000ULL*1000ULL*1000ULL }, | |
2403 | { "G", 1000ULL*1000ULL*1000ULL }, | |
2404 | { "M", 1000ULL*1000ULL }, | |
2405 | { "K", 1000ULL }, | |
2406 | { "B", 1 }, | |
5556b5fe LP |
2407 | { "", 1 }, |
2408 | }; | |
2409 | ||
2410 | const struct table *table; | |
ab1f0633 | 2411 | const char *p; |
b32ff512 | 2412 | unsigned long long r = 0; |
840292be | 2413 | unsigned n_entries, start_pos = 0; |
ab1f0633 LP |
2414 | |
2415 | assert(t); | |
5556b5fe LP |
2416 | assert(base == 1000 || base == 1024); |
2417 | assert(size); | |
2418 | ||
2419 | if (base == 1000) { | |
2420 | table = si; | |
2421 | n_entries = ELEMENTSOF(si); | |
2422 | } else { | |
2423 | table = iec; | |
2424 | n_entries = ELEMENTSOF(iec); | |
2425 | } | |
ab1f0633 LP |
2426 | |
2427 | p = t; | |
2428 | do { | |
2429 | long long l; | |
9480794b ZJS |
2430 | unsigned long long l2; |
2431 | double frac = 0; | |
ab1f0633 LP |
2432 | char *e; |
2433 | unsigned i; | |
2434 | ||
2435 | errno = 0; | |
2436 | l = strtoll(p, &e, 10); | |
2437 | ||
8333c77e | 2438 | if (errno > 0) |
ab1f0633 LP |
2439 | return -errno; |
2440 | ||
2441 | if (l < 0) | |
2442 | return -ERANGE; | |
2443 | ||
2444 | if (e == p) | |
2445 | return -EINVAL; | |
2446 | ||
9480794b ZJS |
2447 | if (*e == '.') { |
2448 | e++; | |
2449 | if (*e >= '0' && *e <= '9') { | |
2450 | char *e2; | |
2451 | ||
2452 | /* strotoull itself would accept space/+/- */ | |
2453 | l2 = strtoull(e, &e2, 10); | |
2454 | ||
2455 | if (errno == ERANGE) | |
2456 | return -errno; | |
2457 | ||
2458 | /* Ignore failure. E.g. 10.M is valid */ | |
2459 | frac = l2; | |
2460 | for (; e < e2; e++) | |
2461 | frac /= 10; | |
2462 | } | |
2463 | } | |
2464 | ||
ab1f0633 LP |
2465 | e += strspn(e, WHITESPACE); |
2466 | ||
840292be | 2467 | for (i = start_pos; i < n_entries; i++) |
ab1f0633 | 2468 | if (startswith(e, table[i].suffix)) { |
b32ff512 | 2469 | unsigned long long tmp; |
9480794b | 2470 | if ((unsigned long long) l + (frac > 0) > ULLONG_MAX / table[i].factor) |
b32ff512 | 2471 | return -ERANGE; |
9480794b | 2472 | tmp = l * table[i].factor + (unsigned long long) (frac * table[i].factor); |
b32ff512 ZJS |
2473 | if (tmp > ULLONG_MAX - r) |
2474 | return -ERANGE; | |
2475 | ||
2476 | r += tmp; | |
2477 | if ((unsigned long long) (off_t) r != r) | |
2478 | return -ERANGE; | |
2479 | ||
ab1f0633 | 2480 | p = e + strlen(table[i].suffix); |
840292be ZJS |
2481 | |
2482 | start_pos = i + 1; | |
ab1f0633 LP |
2483 | break; |
2484 | } | |
2485 | ||
5556b5fe | 2486 | if (i >= n_entries) |
ab1f0633 LP |
2487 | return -EINVAL; |
2488 | ||
b32ff512 | 2489 | } while (*p); |
ab1f0633 | 2490 | |
5556b5fe | 2491 | *size = r; |
ab1f0633 LP |
2492 | |
2493 | return 0; | |
2494 | } | |
2495 | ||
843d2643 LP |
2496 | int make_stdio(int fd) { |
2497 | int r, s, t; | |
2498 | ||
2499 | assert(fd >= 0); | |
2500 | ||
20b63d12 LP |
2501 | r = dup2(fd, STDIN_FILENO); |
2502 | s = dup2(fd, STDOUT_FILENO); | |
2503 | t = dup2(fd, STDERR_FILENO); | |
843d2643 LP |
2504 | |
2505 | if (fd >= 3) | |
03e334a1 | 2506 | safe_close(fd); |
843d2643 LP |
2507 | |
2508 | if (r < 0 || s < 0 || t < 0) | |
2509 | return -errno; | |
2510 | ||
20b63d12 LP |
2511 | /* Explicitly unset O_CLOEXEC, since if fd was < 3, then |
2512 | * dup2() was a NOP and the bit hence possibly set. */ | |
2513 | fd_cloexec(STDIN_FILENO, false); | |
2514 | fd_cloexec(STDOUT_FILENO, false); | |
2515 | fd_cloexec(STDERR_FILENO, false); | |
7862f62d | 2516 | |
843d2643 LP |
2517 | return 0; |
2518 | } | |
2519 | ||
ade509ce LP |
2520 | int make_null_stdio(void) { |
2521 | int null_fd; | |
2522 | ||
cd3bd60a LP |
2523 | null_fd = open("/dev/null", O_RDWR|O_NOCTTY); |
2524 | if (null_fd < 0) | |
ade509ce LP |
2525 | return -errno; |
2526 | ||
2527 | return make_stdio(null_fd); | |
2528 | } | |
2529 | ||
8407a5d0 LP |
2530 | bool is_device_path(const char *path) { |
2531 | ||
2532 | /* Returns true on paths that refer to a device, either in | |
2533 | * sysfs or in /dev */ | |
2534 | ||
2535 | return | |
2536 | path_startswith(path, "/dev/") || | |
2537 | path_startswith(path, "/sys/"); | |
2538 | } | |
2539 | ||
01f78473 | 2540 | int dir_is_empty(const char *path) { |
a05f97b3 | 2541 | _cleanup_closedir_ DIR *d; |
01f78473 | 2542 | |
a05f97b3 LP |
2543 | d = opendir(path); |
2544 | if (!d) | |
01f78473 LP |
2545 | return -errno; |
2546 | ||
2547 | for (;;) { | |
7d5e9c0f | 2548 | struct dirent *de; |
01f78473 | 2549 | |
3fd11280 FW |
2550 | errno = 0; |
2551 | de = readdir(d); | |
2552 | if (!de && errno != 0) | |
2553 | return -errno; | |
01f78473 | 2554 | |
a05f97b3 LP |
2555 | if (!de) |
2556 | return 1; | |
01f78473 | 2557 | |
a34bf9db | 2558 | if (!hidden_file(de->d_name)) |
a05f97b3 LP |
2559 | return 0; |
2560 | } | |
01f78473 LP |
2561 | } |
2562 | ||
844ec79b ZJS |
2563 | char* dirname_malloc(const char *path) { |
2564 | char *d, *dir, *dir2; | |
2565 | ||
2566 | d = strdup(path); | |
2567 | if (!d) | |
2568 | return NULL; | |
2569 | dir = dirname(d); | |
2570 | assert(dir); | |
2571 | ||
2572 | if (dir != d) { | |
2573 | dir2 = strdup(dir); | |
2574 | free(d); | |
2575 | return dir2; | |
2576 | } | |
2577 | ||
2578 | return dir; | |
2579 | } | |
2580 | ||
b89446bb | 2581 | int dev_urandom(void *p, size_t n) { |
539618a0 LP |
2582 | static int have_syscall = -1; |
2583 | int r, fd; | |
9bf3b535 | 2584 | ssize_t k; |
d3782d60 | 2585 | |
97768fc5 LP |
2586 | /* Gathers some randomness from the kernel. This call will |
2587 | * never block, and will always return some data from the | |
2588 | * kernel, regardless if the random pool is fully initialized | |
2589 | * or not. It thus makes no guarantee for the quality of the | |
2590 | * returned entropy, but is good enough for or usual usecases | |
2591 | * of seeding the hash functions for hashtable */ | |
2592 | ||
2593 | /* Use the getrandom() syscall unless we know we don't have | |
2594 | * it, or when the requested size is too large for it. */ | |
539618a0 | 2595 | if (have_syscall != 0 || (size_t) (int) n != n) { |
97768fc5 | 2596 | r = getrandom(p, n, GRND_NONBLOCK); |
539618a0 LP |
2597 | if (r == (int) n) { |
2598 | have_syscall = true; | |
2599 | return 0; | |
2600 | } | |
2601 | ||
2602 | if (r < 0) { | |
2603 | if (errno == ENOSYS) | |
97768fc5 LP |
2604 | /* we lack the syscall, continue with |
2605 | * reading from /dev/urandom */ | |
539618a0 | 2606 | have_syscall = false; |
97768fc5 LP |
2607 | else if (errno == EAGAIN) |
2608 | /* not enough entropy for now. Let's | |
2609 | * remember to use the syscall the | |
2610 | * next time, again, but also read | |
2611 | * from /dev/urandom for now, which | |
2612 | * doesn't care about the current | |
2613 | * amount of entropy. */ | |
2614 | have_syscall = true; | |
539618a0 LP |
2615 | else |
2616 | return -errno; | |
2617 | } else | |
2618 | /* too short read? */ | |
2619 | return -EIO; | |
2620 | } | |
2621 | ||
ac0930c8 LP |
2622 | fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
2623 | if (fd < 0) | |
b89446bb | 2624 | return errno == ENOENT ? -ENOSYS : -errno; |
d3782d60 | 2625 | |
9bf3b535 | 2626 | k = loop_read(fd, p, n, true); |
539618a0 LP |
2627 | safe_close(fd); |
2628 | ||
b89446bb LP |
2629 | if (k < 0) |
2630 | return (int) k; | |
2631 | if ((size_t) k != n) | |
2632 | return -EIO; | |
2633 | ||
2634 | return 0; | |
2635 | } | |
2636 | ||
ef309a68 | 2637 | void initialize_srand(void) { |
b89446bb | 2638 | static bool srand_called = false; |
ef309a68 LP |
2639 | unsigned x; |
2640 | #ifdef HAVE_SYS_AUXV_H | |
2641 | void *auxv; | |
2642 | #endif | |
2643 | ||
2644 | if (srand_called) | |
2645 | return; | |
2646 | ||
2647 | x = 0; | |
2648 | ||
2649 | #ifdef HAVE_SYS_AUXV_H | |
2650 | /* The kernel provides us with a bit of entropy in auxv, so | |
2651 | * let's try to make use of that to seed the pseudo-random | |
2652 | * generator. It's better than nothing... */ | |
2653 | ||
2654 | auxv = (void*) getauxval(AT_RANDOM); | |
2655 | if (auxv) | |
2656 | x ^= *(unsigned*) auxv; | |
2657 | #endif | |
2658 | ||
2659 | x ^= (unsigned) now(CLOCK_REALTIME); | |
2660 | x ^= (unsigned) gettid(); | |
2661 | ||
2662 | srand(x); | |
2663 | srand_called = true; | |
2664 | } | |
2665 | ||
2666 | void random_bytes(void *p, size_t n) { | |
b89446bb LP |
2667 | uint8_t *q; |
2668 | int r; | |
d3782d60 | 2669 | |
b89446bb LP |
2670 | r = dev_urandom(p, n); |
2671 | if (r >= 0) | |
2672 | return; | |
d3782d60 | 2673 | |
b89446bb LP |
2674 | /* If some idiot made /dev/urandom unavailable to us, he'll |
2675 | * get a PRNG instead. */ | |
d3782d60 | 2676 | |
ef309a68 | 2677 | initialize_srand(); |
a3b6fafe | 2678 | |
9bf3b535 LP |
2679 | for (q = p; q < (uint8_t*) p + n; q ++) |
2680 | *q = rand(); | |
a3b6fafe LP |
2681 | } |
2682 | ||
5b6319dc LP |
2683 | void rename_process(const char name[8]) { |
2684 | assert(name); | |
2685 | ||
5d6b1584 LP |
2686 | /* This is a like a poor man's setproctitle(). It changes the |
2687 | * comm field, argv[0], and also the glibc's internally used | |
2688 | * name of the process. For the first one a limit of 16 chars | |
2689 | * applies, to the second one usually one of 10 (i.e. length | |
2690 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
2691 | * "systemd"). If you pass a longer string it will be | |
2692 | * truncated */ | |
5b6319dc | 2693 | |
5d6b1584 | 2694 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
2695 | |
2696 | if (program_invocation_name) | |
2697 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
2698 | |
2699 | if (saved_argc > 0) { | |
2700 | int i; | |
2701 | ||
2702 | if (saved_argv[0]) | |
2703 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
2704 | ||
2705 | for (i = 1; i < saved_argc; i++) { | |
2706 | if (!saved_argv[i]) | |
2707 | break; | |
2708 | ||
29804cc1 | 2709 | memzero(saved_argv[i], strlen(saved_argv[i])); |
9a0e6896 LP |
2710 | } |
2711 | } | |
5b6319dc LP |
2712 | } |
2713 | ||
7d793605 LP |
2714 | void sigset_add_many(sigset_t *ss, ...) { |
2715 | va_list ap; | |
2716 | int sig; | |
2717 | ||
2718 | assert(ss); | |
2719 | ||
2720 | va_start(ap, ss); | |
2721 | while ((sig = va_arg(ap, int)) > 0) | |
2722 | assert_se(sigaddset(ss, sig) == 0); | |
2723 | va_end(ap); | |
2724 | } | |
2725 | ||
856a5a7d LP |
2726 | int sigprocmask_many(int how, ...) { |
2727 | va_list ap; | |
2728 | sigset_t ss; | |
2729 | int sig; | |
2730 | ||
2731 | assert_se(sigemptyset(&ss) == 0); | |
2732 | ||
2733 | va_start(ap, how); | |
2734 | while ((sig = va_arg(ap, int)) > 0) | |
2735 | assert_se(sigaddset(&ss, sig) == 0); | |
2736 | va_end(ap); | |
2737 | ||
2738 | if (sigprocmask(how, &ss, NULL) < 0) | |
2739 | return -errno; | |
2740 | ||
2741 | return 0; | |
2742 | } | |
2743 | ||
ef2f1067 LP |
2744 | char* gethostname_malloc(void) { |
2745 | struct utsname u; | |
2746 | ||
2747 | assert_se(uname(&u) >= 0); | |
2748 | ||
344de609 | 2749 | if (!isempty(u.nodename) && !streq(u.nodename, "(none)")) |
ef2f1067 LP |
2750 | return strdup(u.nodename); |
2751 | ||
2752 | return strdup(u.sysname); | |
2753 | } | |
2754 | ||
344de609 LP |
2755 | bool hostname_is_set(void) { |
2756 | struct utsname u; | |
2757 | ||
2758 | assert_se(uname(&u) >= 0); | |
2759 | ||
2760 | return !isempty(u.nodename) && !streq(u.nodename, "(none)"); | |
2761 | } | |
2762 | ||
f1566e63 | 2763 | char *lookup_uid(uid_t uid) { |
ef2f1067 | 2764 | long bufsize; |
a05f97b3 LP |
2765 | char *name; |
2766 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 2767 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
2768 | |
2769 | /* Shortcut things to avoid NSS lookups */ | |
2770 | if (uid == 0) | |
2771 | return strdup("root"); | |
2772 | ||
7c5f152a LP |
2773 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
2774 | if (bufsize <= 0) | |
ef2f1067 LP |
2775 | bufsize = 4096; |
2776 | ||
7c5f152a LP |
2777 | buf = malloc(bufsize); |
2778 | if (!buf) | |
ef2f1067 LP |
2779 | return NULL; |
2780 | ||
a05f97b3 LP |
2781 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
2782 | return strdup(pw->pw_name); | |
ef2f1067 | 2783 | |
de0671ee | 2784 | if (asprintf(&name, UID_FMT, uid) < 0) |
ef2f1067 LP |
2785 | return NULL; |
2786 | ||
2787 | return name; | |
2788 | } | |
2789 | ||
7c5f152a LP |
2790 | char* getlogname_malloc(void) { |
2791 | uid_t uid; | |
2792 | struct stat st; | |
2793 | ||
2794 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
2795 | uid = st.st_uid; | |
2796 | else | |
2797 | uid = getuid(); | |
2798 | ||
2799 | return lookup_uid(uid); | |
2800 | } | |
2801 | ||
2802 | char *getusername_malloc(void) { | |
2803 | const char *e; | |
2804 | ||
2805 | e = getenv("USER"); | |
2806 | if (e) | |
2807 | return strdup(e); | |
2808 | ||
2809 | return lookup_uid(getuid()); | |
2810 | } | |
2811 | ||
9d8c4979 LP |
2812 | int getttyname_malloc(int fd, char **ret) { |
2813 | size_t l = 100; | |
2814 | int r; | |
8c6db833 | 2815 | |
9d8c4979 LP |
2816 | assert(fd >= 0); |
2817 | assert(ret); | |
ef2f1067 | 2818 | |
9d8c4979 LP |
2819 | for (;;) { |
2820 | char path[l]; | |
ef2f1067 | 2821 | |
9d8c4979 LP |
2822 | r = ttyname_r(fd, path, sizeof(path)); |
2823 | if (r == 0) { | |
2824 | const char *p; | |
2825 | char *c; | |
ef2f1067 | 2826 | |
9d8c4979 LP |
2827 | p = startswith(path, "/dev/"); |
2828 | c = strdup(p ?: path); | |
2829 | if (!c) | |
2830 | return -ENOMEM; | |
2831 | ||
2832 | *ret = c; | |
2833 | return 0; | |
2834 | } | |
2835 | ||
2836 | if (r != ERANGE) | |
2837 | return -r; | |
2838 | ||
2839 | l *= 2; | |
2840 | } | |
8c6db833 | 2841 | |
8c6db833 LP |
2842 | return 0; |
2843 | } | |
2844 | ||
fc116c6a LP |
2845 | int getttyname_harder(int fd, char **r) { |
2846 | int k; | |
2847 | char *s; | |
2848 | ||
a05f97b3 LP |
2849 | k = getttyname_malloc(fd, &s); |
2850 | if (k < 0) | |
fc116c6a LP |
2851 | return k; |
2852 | ||
2853 | if (streq(s, "tty")) { | |
2854 | free(s); | |
4d6d6518 | 2855 | return get_ctty(0, NULL, r); |
fc116c6a LP |
2856 | } |
2857 | ||
2858 | *r = s; | |
2859 | return 0; | |
2860 | } | |
2861 | ||
4d6d6518 | 2862 | int get_ctty_devnr(pid_t pid, dev_t *d) { |
b4696bce SP |
2863 | int r; |
2864 | _cleanup_free_ char *line = NULL; | |
2865 | const char *p; | |
fc116c6a | 2866 | unsigned long ttynr; |
fc116c6a | 2867 | |
49aa47c7 | 2868 | assert(pid >= 0); |
49aa47c7 | 2869 | |
b4696bce SP |
2870 | p = procfs_file_alloca(pid, "stat"); |
2871 | r = read_one_line_file(p, &line); | |
2872 | if (r < 0) | |
2873 | return r; | |
fc116c6a | 2874 | |
4d6d6518 LP |
2875 | p = strrchr(line, ')'); |
2876 | if (!p) | |
fc116c6a LP |
2877 | return -EIO; |
2878 | ||
2879 | p++; | |
2880 | ||
2881 | if (sscanf(p, " " | |
2882 | "%*c " /* state */ | |
2883 | "%*d " /* ppid */ | |
2884 | "%*d " /* pgrp */ | |
2885 | "%*d " /* session */ | |
2886 | "%lu ", /* ttynr */ | |
2887 | &ttynr) != 1) | |
2888 | return -EIO; | |
2889 | ||
11dc5d2b LP |
2890 | if (major(ttynr) == 0 && minor(ttynr) == 0) |
2891 | return -ENOENT; | |
2892 | ||
0bee65f0 LP |
2893 | if (d) |
2894 | *d = (dev_t) ttynr; | |
2895 | ||
fc116c6a LP |
2896 | return 0; |
2897 | } | |
2898 | ||
4d6d6518 | 2899 | int get_ctty(pid_t pid, dev_t *_devnr, char **r) { |
833fce28 LP |
2900 | char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *b = NULL; |
2901 | _cleanup_free_ char *s = NULL; | |
2902 | const char *p; | |
fc116c6a | 2903 | dev_t devnr; |
833fce28 | 2904 | int k; |
fc116c6a LP |
2905 | |
2906 | assert(r); | |
2907 | ||
4d6d6518 LP |
2908 | k = get_ctty_devnr(pid, &devnr); |
2909 | if (k < 0) | |
fc116c6a LP |
2910 | return k; |
2911 | ||
f4934dfa | 2912 | sprintf(fn, "/dev/char/%u:%u", major(devnr), minor(devnr)); |
fc116c6a | 2913 | |
23406ce5 LP |
2914 | k = readlink_malloc(fn, &s); |
2915 | if (k < 0) { | |
fc116c6a LP |
2916 | |
2917 | if (k != -ENOENT) | |
2918 | return k; | |
2919 | ||
46824d0e LP |
2920 | /* This is an ugly hack */ |
2921 | if (major(devnr) == 136) { | |
de0671ee | 2922 | asprintf(&b, "pts/%u", minor(devnr)); |
833fce28 | 2923 | goto finish; |
46824d0e LP |
2924 | } |
2925 | ||
fc116c6a LP |
2926 | /* Probably something like the ptys which have no |
2927 | * symlink in /dev/char. Let's return something | |
2928 | * vaguely useful. */ | |
2929 | ||
23406ce5 | 2930 | b = strdup(fn + 5); |
833fce28 | 2931 | goto finish; |
fc116c6a LP |
2932 | } |
2933 | ||
2934 | if (startswith(s, "/dev/")) | |
2935 | p = s + 5; | |
2936 | else if (startswith(s, "../")) | |
2937 | p = s + 3; | |
2938 | else | |
2939 | p = s; | |
2940 | ||
2941 | b = strdup(p); | |
fc116c6a | 2942 | |
833fce28 | 2943 | finish: |
fc116c6a LP |
2944 | if (!b) |
2945 | return -ENOMEM; | |
2946 | ||
2947 | *r = b; | |
46824d0e LP |
2948 | if (_devnr) |
2949 | *_devnr = devnr; | |
2950 | ||
fc116c6a LP |
2951 | return 0; |
2952 | } | |
2953 | ||
f56d5db9 | 2954 | int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
dede0e33 | 2955 | _cleanup_closedir_ DIR *d = NULL; |
8c6db833 LP |
2956 | int ret = 0; |
2957 | ||
2958 | assert(fd >= 0); | |
2959 | ||
2960 | /* This returns the first error we run into, but nevertheless | |
7925c22a | 2961 | * tries to go on. This closes the passed fd. */ |
8c6db833 | 2962 | |
d4d046e3 LP |
2963 | d = fdopendir(fd); |
2964 | if (!d) { | |
03e334a1 | 2965 | safe_close(fd); |
4c633005 LP |
2966 | |
2967 | return errno == ENOENT ? 0 : -errno; | |
8c6db833 LP |
2968 | } |
2969 | ||
2970 | for (;;) { | |
7d5e9c0f | 2971 | struct dirent *de; |
7925c22a LP |
2972 | bool is_dir, keep_around; |
2973 | struct stat st; | |
8c6db833 LP |
2974 | int r; |
2975 | ||
3fd11280 FW |
2976 | errno = 0; |
2977 | de = readdir(d); | |
dede0e33 ZJS |
2978 | if (!de) { |
2979 | if (errno != 0 && ret == 0) | |
3fd11280 | 2980 | ret = -errno; |
dede0e33 | 2981 | return ret; |
8c6db833 LP |
2982 | } |
2983 | ||
8c6db833 LP |
2984 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) |
2985 | continue; | |
2986 | ||
7925c22a LP |
2987 | if (de->d_type == DT_UNKNOWN || |
2988 | honour_sticky || | |
2989 | (de->d_type == DT_DIR && root_dev)) { | |
8c6db833 | 2990 | if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { |
4c633005 | 2991 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
2992 | ret = -errno; |
2993 | continue; | |
2994 | } | |
2995 | ||
2996 | is_dir = S_ISDIR(st.st_mode); | |
7925c22a LP |
2997 | keep_around = |
2998 | honour_sticky && | |
2999 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
3000 | (st.st_mode & S_ISVTX); | |
ad293f5a | 3001 | } else { |
8c6db833 | 3002 | is_dir = de->d_type == DT_DIR; |
7925c22a | 3003 | keep_around = false; |
ad293f5a | 3004 | } |
8c6db833 LP |
3005 | |
3006 | if (is_dir) { | |
3007 | int subdir_fd; | |
8c6db833 | 3008 | |
597f43c7 | 3009 | /* if root_dev is set, remove subdirectories only, if device is same as dir */ |
7925c22a LP |
3010 | if (root_dev && st.st_dev != root_dev->st_dev) |
3011 | continue; | |
8c6db833 | 3012 | |
7925c22a LP |
3013 | subdir_fd = openat(fd, de->d_name, |
3014 | O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); | |
3015 | if (subdir_fd < 0) { | |
3016 | if (ret == 0 && errno != ENOENT) | |
3017 | ret = -errno; | |
3018 | continue; | |
3019 | } | |
3020 | ||
b3d28469 | 3021 | r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev); |
7925c22a LP |
3022 | if (r < 0 && ret == 0) |
3023 | ret = r; | |
3024 | ||
3025 | if (!keep_around) | |
3026 | if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) { | |
ad293f5a LP |
3027 | if (ret == 0 && errno != ENOENT) |
3028 | ret = -errno; | |
3029 | } | |
3030 | ||
3031 | } else if (!only_dirs && !keep_around) { | |
8c6db833 LP |
3032 | |
3033 | if (unlinkat(fd, de->d_name, 0) < 0) { | |
4c633005 | 3034 | if (ret == 0 && errno != ENOENT) |
8c6db833 LP |
3035 | ret = -errno; |
3036 | } | |
3037 | } | |
3038 | } | |
8c6db833 LP |
3039 | } |
3040 | ||
44a6b1b6 | 3041 | _pure_ static int is_temporary_fs(struct statfs *s) { |
943aad8c | 3042 | assert(s); |
73020ab2 SL |
3043 | |
3044 | return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) || | |
3045 | F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC); | |
943aad8c ZJS |
3046 | } |
3047 | ||
979ef53a DR |
3048 | int is_fd_on_temporary_fs(int fd) { |
3049 | struct statfs s; | |
3050 | ||
3051 | if (fstatfs(fd, &s) < 0) | |
3052 | return -errno; | |
3053 | ||
3054 | return is_temporary_fs(&s); | |
3055 | } | |
3056 | ||
f56d5db9 LP |
3057 | int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) { |
3058 | struct statfs s; | |
3059 | ||
3060 | assert(fd >= 0); | |
3061 | ||
3062 | if (fstatfs(fd, &s) < 0) { | |
03e334a1 | 3063 | safe_close(fd); |
f56d5db9 LP |
3064 | return -errno; |
3065 | } | |
3066 | ||
3067 | /* We refuse to clean disk file systems with this call. This | |
3068 | * is extra paranoia just to be sure we never ever remove | |
3069 | * non-state data */ | |
943aad8c | 3070 | if (!is_temporary_fs(&s)) { |
f56d5db9 | 3071 | log_error("Attempted to remove disk file system, and we can't allow that."); |
03e334a1 | 3072 | safe_close(fd); |
f56d5db9 LP |
3073 | return -EPERM; |
3074 | } | |
3075 | ||
3076 | return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev); | |
3077 | } | |
3078 | ||
b5e1fad5 LP |
3079 | static int file_is_priv_sticky(const char *p) { |
3080 | struct stat st; | |
3081 | ||
3082 | assert(p); | |
3083 | ||
3084 | if (lstat(p, &st) < 0) | |
3085 | return -errno; | |
3086 | ||
3087 | return | |
3088 | (st.st_uid == 0 || st.st_uid == getuid()) && | |
3089 | (st.st_mode & S_ISVTX); | |
3090 | } | |
3091 | ||
f56d5db9 LP |
3092 | static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) { |
3093 | int fd, r; | |
3094 | struct statfs s; | |
8c6db833 LP |
3095 | |
3096 | assert(path); | |
3097 | ||
f56d5db9 LP |
3098 | /* We refuse to clean the root file system with this |
3099 | * call. This is extra paranoia to never cause a really | |
3100 | * seriously broken system. */ | |
3101 | if (path_equal(path, "/")) { | |
3102 | log_error("Attempted to remove entire root file system, and we can't allow that."); | |
3103 | return -EPERM; | |
3104 | } | |
461b1822 | 3105 | |
d4d046e3 LP |
3106 | fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); |
3107 | if (fd < 0) { | |
8c6db833 | 3108 | |
e02d225b | 3109 | if (errno != ENOTDIR && errno != ELOOP) |
8c6db833 LP |
3110 | return -errno; |
3111 | ||
f56d5db9 LP |
3112 | if (!dangerous) { |
3113 | if (statfs(path, &s) < 0) | |
3114 | return -errno; | |
3115 | ||
943aad8c | 3116 | if (!is_temporary_fs(&s)) { |
f56d5db9 LP |
3117 | log_error("Attempted to remove disk file system, and we can't allow that."); |
3118 | return -EPERM; | |
3119 | } | |
3120 | } | |
3121 | ||
8c6db833 | 3122 | if (delete_root && !only_dirs) |
d4d046e3 | 3123 | if (unlink(path) < 0 && errno != ENOENT) |
8c6db833 LP |
3124 | return -errno; |
3125 | ||
3126 | return 0; | |
3127 | } | |
3128 | ||
f56d5db9 LP |
3129 | if (!dangerous) { |
3130 | if (fstatfs(fd, &s) < 0) { | |
03e334a1 | 3131 | safe_close(fd); |
f56d5db9 LP |
3132 | return -errno; |
3133 | } | |
ad293f5a | 3134 | |
943aad8c | 3135 | if (!is_temporary_fs(&s)) { |
f56d5db9 | 3136 | log_error("Attempted to remove disk file system, and we can't allow that."); |
03e334a1 | 3137 | safe_close(fd); |
f56d5db9 LP |
3138 | return -EPERM; |
3139 | } | |
3140 | } | |
3141 | ||
3142 | r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL); | |
ad293f5a LP |
3143 | if (delete_root) { |
3144 | ||
8d53b453 | 3145 | if (honour_sticky && file_is_priv_sticky(path) > 0) |
ad293f5a | 3146 | return r; |
8c6db833 | 3147 | |
e27796a0 | 3148 | if (rmdir(path) < 0 && errno != ENOENT) { |
8c6db833 LP |
3149 | if (r == 0) |
3150 | r = -errno; | |
3151 | } | |
ad293f5a | 3152 | } |
8c6db833 LP |
3153 | |
3154 | return r; | |
3155 | } | |
3156 | ||
f56d5db9 LP |
3157 | int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { |
3158 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false); | |
3159 | } | |
3160 | ||
3161 | int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) { | |
3162 | return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true); | |
3163 | } | |
3164 | ||
8c6db833 LP |
3165 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
3166 | assert(path); | |
3167 | ||
3168 | /* Under the assumption that we are running privileged we | |
3169 | * first change the access mode and only then hand out | |
3170 | * ownership to avoid a window where access is too open. */ | |
3171 | ||
fed1e721 | 3172 | if (mode != MODE_INVALID) |
8d53b453 LP |
3173 | if (chmod(path, mode) < 0) |
3174 | return -errno; | |
8c6db833 | 3175 | |
fed1e721 | 3176 | if (uid != UID_INVALID || gid != GID_INVALID) |
8d53b453 LP |
3177 | if (chown(path, uid, gid) < 0) |
3178 | return -errno; | |
8c6db833 LP |
3179 | |
3180 | return 0; | |
ef2f1067 LP |
3181 | } |
3182 | ||
f4b47811 LP |
3183 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
3184 | assert(fd >= 0); | |
3185 | ||
3186 | /* Under the assumption that we are running privileged we | |
3187 | * first change the access mode and only then hand out | |
3188 | * ownership to avoid a window where access is too open. */ | |
3189 | ||
fed1e721 | 3190 | if (mode != MODE_INVALID) |
9588bc32 LP |
3191 | if (fchmod(fd, mode) < 0) |
3192 | return -errno; | |
f4b47811 | 3193 | |
fed1e721 | 3194 | if (uid != UID_INVALID || gid != GID_INVALID) |
9588bc32 LP |
3195 | if (fchown(fd, uid, gid) < 0) |
3196 | return -errno; | |
f4b47811 LP |
3197 | |
3198 | return 0; | |
3199 | } | |
3200 | ||
82c121a4 LP |
3201 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
3202 | cpu_set_t *r; | |
3203 | unsigned n = 1024; | |
3204 | ||
3205 | /* Allocates the cpuset in the right size */ | |
3206 | ||
3207 | for (;;) { | |
3208 | if (!(r = CPU_ALLOC(n))) | |
3209 | return NULL; | |
3210 | ||
3211 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
3212 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
3213 | ||
3214 | if (ncpus) | |
3215 | *ncpus = n; | |
3216 | ||
3217 | return r; | |
3218 | } | |
3219 | ||
3220 | CPU_FREE(r); | |
3221 | ||
3222 | if (errno != EINVAL) | |
3223 | return NULL; | |
3224 | ||
3225 | n *= 2; | |
3226 | } | |
3227 | } | |
3228 | ||
984a2be4 | 3229 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) { |
9ab7a8d2 | 3230 | static const char status_indent[] = " "; /* "[" STATUS "] " */ |
669bec5d LP |
3231 | _cleanup_free_ char *s = NULL; |
3232 | _cleanup_close_ int fd = -1; | |
b92bea5d | 3233 | struct iovec iovec[6] = {}; |
81beb750 | 3234 | int n = 0; |
984a2be4 | 3235 | static bool prev_ephemeral; |
9e58ff9c LP |
3236 | |
3237 | assert(format); | |
3238 | ||
9ab7a8d2 | 3239 | /* This is independent of logging, as status messages are |
9e58ff9c LP |
3240 | * optional and go exclusively to the console. */ |
3241 | ||
3242 | if (vasprintf(&s, format, ap) < 0) | |
669bec5d | 3243 | return log_oom(); |
9e58ff9c | 3244 | |
67e5cc4f | 3245 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
81beb750 | 3246 | if (fd < 0) |
669bec5d | 3247 | return fd; |
9e58ff9c | 3248 | |
67e5cc4f | 3249 | if (ellipse) { |
9ab7a8d2 MS |
3250 | char *e; |
3251 | size_t emax, sl; | |
3252 | int c; | |
3253 | ||
67e5cc4f LP |
3254 | c = fd_columns(fd); |
3255 | if (c <= 0) | |
3256 | c = 80; | |
81beb750 | 3257 | |
669bec5d | 3258 | sl = status ? sizeof(status_indent)-1 : 0; |
9ab7a8d2 MS |
3259 | |
3260 | emax = c - sl - 1; | |
3261 | if (emax < 3) | |
3262 | emax = 3; | |
81beb750 | 3263 | |
58d61742 | 3264 | e = ellipsize(s, emax, 50); |
67e5cc4f LP |
3265 | if (e) { |
3266 | free(s); | |
3267 | s = e; | |
3268 | } | |
81beb750 LP |
3269 | } |
3270 | ||
984a2be4 MS |
3271 | if (prev_ephemeral) |
3272 | IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE); | |
3273 | prev_ephemeral = ephemeral; | |
3274 | ||
9ab7a8d2 MS |
3275 | if (status) { |
3276 | if (!isempty(status)) { | |
3277 | IOVEC_SET_STRING(iovec[n++], "["); | |
3278 | IOVEC_SET_STRING(iovec[n++], status); | |
3279 | IOVEC_SET_STRING(iovec[n++], "] "); | |
3280 | } else | |
3281 | IOVEC_SET_STRING(iovec[n++], status_indent); | |
81beb750 LP |
3282 | } |
3283 | ||
9ab7a8d2 | 3284 | IOVEC_SET_STRING(iovec[n++], s); |
984a2be4 MS |
3285 | if (!ephemeral) |
3286 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
81beb750 | 3287 | |
669bec5d LP |
3288 | if (writev(fd, iovec, n) < 0) |
3289 | return -errno; | |
9e58ff9c | 3290 | |
669bec5d | 3291 | return 0; |
9e58ff9c LP |
3292 | } |
3293 | ||
984a2be4 | 3294 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) { |
c846ff47 | 3295 | va_list ap; |
669bec5d | 3296 | int r; |
c846ff47 LP |
3297 | |
3298 | assert(format); | |
3299 | ||
3300 | va_start(ap, format); | |
984a2be4 | 3301 | r = status_vprintf(status, ellipse, ephemeral, format, ap); |
c846ff47 | 3302 | va_end(ap); |
669bec5d LP |
3303 | |
3304 | return r; | |
c846ff47 LP |
3305 | } |
3306 | ||
fab56fc5 LP |
3307 | char *replace_env(const char *format, char **env) { |
3308 | enum { | |
3309 | WORD, | |
c24eb49e | 3310 | CURLY, |
fab56fc5 LP |
3311 | VARIABLE |
3312 | } state = WORD; | |
3313 | ||
3314 | const char *e, *word = format; | |
3315 | char *r = NULL, *k; | |
3316 | ||
3317 | assert(format); | |
3318 | ||
3319 | for (e = format; *e; e ++) { | |
3320 | ||
3321 | switch (state) { | |
3322 | ||
3323 | case WORD: | |
3324 | if (*e == '$') | |
c24eb49e | 3325 | state = CURLY; |
fab56fc5 LP |
3326 | break; |
3327 | ||
c24eb49e LP |
3328 | case CURLY: |
3329 | if (*e == '{') { | |
4a6ca457 LP |
3330 | k = strnappend(r, word, e-word-1); |
3331 | if (!k) | |
fab56fc5 LP |
3332 | goto fail; |
3333 | ||
3334 | free(r); | |
3335 | r = k; | |
3336 | ||
3337 | word = e-1; | |
3338 | state = VARIABLE; | |
3339 | ||
3340 | } else if (*e == '$') { | |
4a6ca457 LP |
3341 | k = strnappend(r, word, e-word); |
3342 | if (!k) | |
fab56fc5 LP |
3343 | goto fail; |
3344 | ||
3345 | free(r); | |
3346 | r = k; | |
3347 | ||
3348 | word = e+1; | |
3349 | state = WORD; | |
3350 | } else | |
3351 | state = WORD; | |
3352 | break; | |
3353 | ||
3354 | case VARIABLE: | |
c24eb49e | 3355 | if (*e == '}') { |
b95cf362 | 3356 | const char *t; |
fab56fc5 | 3357 | |
4d1a6904 | 3358 | t = strempty(strv_env_get_n(env, word+2, e-word-2)); |
fab56fc5 | 3359 | |
4d1a6904 LP |
3360 | k = strappend(r, t); |
3361 | if (!k) | |
b95cf362 | 3362 | goto fail; |
fab56fc5 | 3363 | |
b95cf362 LP |
3364 | free(r); |
3365 | r = k; | |
fab56fc5 | 3366 | |
b95cf362 | 3367 | word = e+1; |
fab56fc5 LP |
3368 | state = WORD; |
3369 | } | |
3370 | break; | |
3371 | } | |
3372 | } | |
3373 | ||
4a6ca457 LP |
3374 | k = strnappend(r, word, e-word); |
3375 | if (!k) | |
fab56fc5 LP |
3376 | goto fail; |
3377 | ||
3378 | free(r); | |
3379 | return k; | |
3380 | ||
3381 | fail: | |
3382 | free(r); | |
3383 | return NULL; | |
3384 | } | |
3385 | ||
3386 | char **replace_env_argv(char **argv, char **env) { | |
b2fadec6 | 3387 | char **ret, **i; |
c24eb49e LP |
3388 | unsigned k = 0, l = 0; |
3389 | ||
3390 | l = strv_length(argv); | |
fab56fc5 | 3391 | |
b2fadec6 ZJS |
3392 | ret = new(char*, l+1); |
3393 | if (!ret) | |
fab56fc5 LP |
3394 | return NULL; |
3395 | ||
3396 | STRV_FOREACH(i, argv) { | |
c24eb49e LP |
3397 | |
3398 | /* If $FOO appears as single word, replace it by the split up variable */ | |
b95cf362 LP |
3399 | if ((*i)[0] == '$' && (*i)[1] != '{') { |
3400 | char *e; | |
3401 | char **w, **m; | |
3402 | unsigned q; | |
c24eb49e | 3403 | |
4d1a6904 LP |
3404 | e = strv_env_get(env, *i+1); |
3405 | if (e) { | |
b2fadec6 | 3406 | int r; |
c24eb49e | 3407 | |
f88e6be5 | 3408 | r = strv_split_quoted(&m, e, true); |
b2fadec6 ZJS |
3409 | if (r < 0) { |
3410 | ret[k] = NULL; | |
3411 | strv_free(ret); | |
c24eb49e LP |
3412 | return NULL; |
3413 | } | |
b95cf362 LP |
3414 | } else |
3415 | m = NULL; | |
c24eb49e | 3416 | |
b95cf362 LP |
3417 | q = strv_length(m); |
3418 | l = l + q - 1; | |
c24eb49e | 3419 | |
b2fadec6 ZJS |
3420 | w = realloc(ret, sizeof(char*) * (l+1)); |
3421 | if (!w) { | |
3422 | ret[k] = NULL; | |
3423 | strv_free(ret); | |
b95cf362 LP |
3424 | strv_free(m); |
3425 | return NULL; | |
3426 | } | |
c24eb49e | 3427 | |
b2fadec6 | 3428 | ret = w; |
b95cf362 | 3429 | if (m) { |
b2fadec6 | 3430 | memcpy(ret + k, m, q * sizeof(char*)); |
c24eb49e | 3431 | free(m); |
c24eb49e | 3432 | } |
b95cf362 LP |
3433 | |
3434 | k += q; | |
3435 | continue; | |
c24eb49e LP |
3436 | } |
3437 | ||
3438 | /* If ${FOO} appears as part of a word, replace it by the variable as-is */ | |
b2fadec6 ZJS |
3439 | ret[k] = replace_env(*i, env); |
3440 | if (!ret[k]) { | |
3441 | strv_free(ret); | |
fab56fc5 LP |
3442 | return NULL; |
3443 | } | |
b2fadec6 | 3444 | k++; |
fab56fc5 LP |
3445 | } |
3446 | ||
b2fadec6 ZJS |
3447 | ret[k] = NULL; |
3448 | return ret; | |
fab56fc5 LP |
3449 | } |
3450 | ||
81beb750 | 3451 | int fd_columns(int fd) { |
b92bea5d | 3452 | struct winsize ws = {}; |
81beb750 LP |
3453 | |
3454 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3455 | return -errno; | |
3456 | ||
3457 | if (ws.ws_col <= 0) | |
3458 | return -EIO; | |
3459 | ||
3460 | return ws.ws_col; | |
3461 | } | |
3462 | ||
28917d7d | 3463 | unsigned columns(void) { |
fa776d8e | 3464 | const char *e; |
7009eec2 | 3465 | int c; |
fa776d8e | 3466 | |
28917d7d LP |
3467 | if (_likely_(cached_columns > 0)) |
3468 | return cached_columns; | |
11f96fac | 3469 | |
28917d7d LP |
3470 | c = 0; |
3471 | e = getenv("COLUMNS"); | |
c6828d27 TG |
3472 | if (e) |
3473 | (void) safe_atoi(e, &c); | |
fa776d8e | 3474 | |
28917d7d LP |
3475 | if (c <= 0) |
3476 | c = fd_columns(STDOUT_FILENO); | |
fa776d8e | 3477 | |
28917d7d LP |
3478 | if (c <= 0) |
3479 | c = 80; | |
11f96fac | 3480 | |
28917d7d | 3481 | cached_columns = c; |
9bc5cd6d | 3482 | return cached_columns; |
11f96fac ZJS |
3483 | } |
3484 | ||
8f2d43a0 | 3485 | int fd_lines(int fd) { |
b92bea5d | 3486 | struct winsize ws = {}; |
8f2d43a0 LP |
3487 | |
3488 | if (ioctl(fd, TIOCGWINSZ, &ws) < 0) | |
3489 | return -errno; | |
3490 | ||
3491 | if (ws.ws_row <= 0) | |
3492 | return -EIO; | |
3493 | ||
3494 | return ws.ws_row; | |
3495 | } | |
3496 | ||
3497 | unsigned lines(void) { | |
8f2d43a0 | 3498 | const char *e; |
9bc5cd6d | 3499 | int l; |
8f2d43a0 | 3500 | |
ed757c0c LP |
3501 | if (_likely_(cached_lines > 0)) |
3502 | return cached_lines; | |
8f2d43a0 | 3503 | |
ed757c0c | 3504 | l = 0; |
8f2d43a0 | 3505 | e = getenv("LINES"); |
acb3b3dd | 3506 | if (e) |
9bc5cd6d | 3507 | (void) safe_atoi(e, &l); |
8f2d43a0 | 3508 | |
ed757c0c LP |
3509 | if (l <= 0) |
3510 | l = fd_lines(STDOUT_FILENO); | |
8f2d43a0 | 3511 | |
ed757c0c LP |
3512 | if (l <= 0) |
3513 | l = 24; | |
8f2d43a0 | 3514 | |
ed757c0c LP |
3515 | cached_lines = l; |
3516 | return cached_lines; | |
3517 | } | |
3518 | ||
3519 | /* intended to be used as a SIGWINCH sighandler */ | |
3520 | void columns_lines_cache_reset(int signum) { | |
3521 | cached_columns = 0; | |
3522 | cached_lines = 0; | |
3523 | } | |
3524 | ||
3525 | bool on_tty(void) { | |
3526 | static int cached_on_tty = -1; | |
3527 | ||
3528 | if (_unlikely_(cached_on_tty < 0)) | |
3529 | cached_on_tty = isatty(STDOUT_FILENO) > 0; | |
3530 | ||
3531 | return cached_on_tty; | |
8f2d43a0 LP |
3532 | } |
3533 | ||
9d9951a4 HH |
3534 | int files_same(const char *filea, const char *fileb) { |
3535 | struct stat a, b; | |
b4f10a5e | 3536 | |
9d9951a4 | 3537 | if (stat(filea, &a) < 0) |
b4f10a5e LP |
3538 | return -errno; |
3539 | ||
9d9951a4 | 3540 | if (stat(fileb, &b) < 0) |
b4f10a5e LP |
3541 | return -errno; |
3542 | ||
9d9951a4 HH |
3543 | return a.st_dev == b.st_dev && |
3544 | a.st_ino == b.st_ino; | |
3545 | } | |
3546 | ||
3547 | int running_in_chroot(void) { | |
3548 | int ret; | |
3549 | ||
3550 | ret = files_same("/proc/1/root", "/"); | |
3551 | if (ret < 0) | |
3552 | return ret; | |
3553 | ||
3554 | return ret == 0; | |
b4f10a5e LP |
3555 | } |
3556 | ||
f405e86d | 3557 | static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
72f59706 | 3558 | size_t x; |
8fe914ec LP |
3559 | char *r; |
3560 | ||
3561 | assert(s); | |
3562 | assert(percent <= 100); | |
72f59706 | 3563 | assert(new_length >= 3); |
8fe914ec | 3564 | |
72f59706 LP |
3565 | if (old_length <= 3 || old_length <= new_length) |
3566 | return strndup(s, old_length); | |
8fe914ec | 3567 | |
72f59706 LP |
3568 | r = new0(char, new_length+1); |
3569 | if (!r) | |
a6f0104a | 3570 | return NULL; |
8fe914ec | 3571 | |
72f59706 | 3572 | x = (new_length * percent) / 100; |
8fe914ec | 3573 | |
72f59706 LP |
3574 | if (x > new_length - 3) |
3575 | x = new_length - 3; | |
8fe914ec LP |
3576 | |
3577 | memcpy(r, s, x); | |
3578 | r[x] = '.'; | |
3579 | r[x+1] = '.'; | |
3580 | r[x+2] = '.'; | |
3581 | memcpy(r + x + 3, | |
72f59706 LP |
3582 | s + old_length - (new_length - x - 3), |
3583 | new_length - x - 3); | |
8fe914ec LP |
3584 | |
3585 | return r; | |
3586 | } | |
3587 | ||
f405e86d SL |
3588 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
3589 | size_t x; | |
3590 | char *e; | |
3591 | const char *i, *j; | |
3592 | unsigned k, len, len2; | |
3593 | ||
3594 | assert(s); | |
3595 | assert(percent <= 100); | |
3596 | assert(new_length >= 3); | |
3597 | ||
3598 | /* if no multibyte characters use ascii_ellipsize_mem for speed */ | |
3599 | if (ascii_is_valid(s)) | |
3600 | return ascii_ellipsize_mem(s, old_length, new_length, percent); | |
3601 | ||
3602 | if (old_length <= 3 || old_length <= new_length) | |
3603 | return strndup(s, old_length); | |
3604 | ||
3605 | x = (new_length * percent) / 100; | |
3606 | ||
3607 | if (x > new_length - 3) | |
3608 | x = new_length - 3; | |
3609 | ||
3610 | k = 0; | |
3611 | for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) { | |
3612 | int c; | |
3613 | ||
3614 | c = utf8_encoded_to_unichar(i); | |
3615 | if (c < 0) | |
3616 | return NULL; | |
3617 | k += unichar_iswide(c) ? 2 : 1; | |
3618 | } | |
3619 | ||
3620 | if (k > x) /* last character was wide and went over quota */ | |
3621 | x ++; | |
3622 | ||
3623 | for (j = s + old_length; k < new_length && j > i; ) { | |
3624 | int c; | |
3625 | ||
3626 | j = utf8_prev_char(j); | |
3627 | c = utf8_encoded_to_unichar(j); | |
3628 | if (c < 0) | |
3629 | return NULL; | |
3630 | k += unichar_iswide(c) ? 2 : 1; | |
3631 | } | |
3632 | assert(i <= j); | |
3633 | ||
3634 | /* we don't actually need to ellipsize */ | |
3635 | if (i == j) | |
3636 | return memdup(s, old_length + 1); | |
3637 | ||
3638 | /* make space for ellipsis */ | |
3639 | j = utf8_next_char(j); | |
3640 | ||
3641 | len = i - s; | |
3642 | len2 = s + old_length - j; | |
3643 | e = new(char, len + 3 + len2 + 1); | |
3644 | if (!e) | |
3645 | return NULL; | |
3646 | ||
3647 | /* | |
3648 | printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n", | |
3649 | old_length, new_length, x, len, len2, k); | |
3650 | */ | |
3651 | ||
3652 | memcpy(e, s, len); | |
3653 | e[len] = 0xe2; /* tri-dot ellipsis: … */ | |
3654 | e[len + 1] = 0x80; | |
3655 | e[len + 2] = 0xa6; | |
3656 | ||
3657 | memcpy(e + len + 3, j, len2 + 1); | |
3658 | ||
3659 | return e; | |
3660 | } | |
3661 | ||
72f59706 LP |
3662 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
3663 | return ellipsize_mem(s, strlen(s), length, percent); | |
3664 | } | |
3665 | ||
c38dfac9 | 3666 | int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode) { |
03e334a1 | 3667 | _cleanup_close_ int fd; |
c38dfac9 | 3668 | int r; |
f6144808 LP |
3669 | |
3670 | assert(path); | |
3671 | ||
c38dfac9 KS |
3672 | if (parents) |
3673 | mkdir_parents(path, 0755); | |
73836c5c | 3674 | |
c38dfac9 | 3675 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, mode > 0 ? mode : 0644); |
73836c5c | 3676 | if (fd < 0) |
f6144808 LP |
3677 | return -errno; |
3678 | ||
c38dfac9 KS |
3679 | if (mode > 0) { |
3680 | r = fchmod(fd, mode); | |
3681 | if (r < 0) | |
3682 | return -errno; | |
3683 | } | |
3684 | ||
fed1e721 | 3685 | if (uid != UID_INVALID || gid != GID_INVALID) { |
c38dfac9 KS |
3686 | r = fchown(fd, uid, gid); |
3687 | if (r < 0) | |
3688 | return -errno; | |
3689 | } | |
3690 | ||
3a43da28 | 3691 | if (stamp != USEC_INFINITY) { |
c38dfac9 KS |
3692 | struct timespec ts[2]; |
3693 | ||
3694 | timespec_store(&ts[0], stamp); | |
359efc59 | 3695 | ts[1] = ts[0]; |
c38dfac9 KS |
3696 | r = futimens(fd, ts); |
3697 | } else | |
3698 | r = futimens(fd, NULL); | |
3699 | if (r < 0) | |
3700 | return -errno; | |
3701 | ||
f6144808 LP |
3702 | return 0; |
3703 | } | |
afea26ad | 3704 | |
c38dfac9 | 3705 | int touch(const char *path) { |
fed1e721 | 3706 | return touch_file(path, false, USEC_INFINITY, UID_INVALID, GID_INVALID, 0); |
c38dfac9 KS |
3707 | } |
3708 | ||
97c4a07d | 3709 | char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
3710 | size_t l; |
3711 | assert(s); | |
3712 | ||
73836c5c LP |
3713 | /* This is rather stupid, simply removes the heading and |
3714 | * trailing quotes if there is one. Doesn't care about | |
57f30678 | 3715 | * escaping or anything. We should make this smarter one |
cc13b327 | 3716 | * day... */ |
73836c5c | 3717 | |
31ed59c5 LP |
3718 | l = strlen(s); |
3719 | if (l < 2) | |
11ce3427 LP |
3720 | return strdup(s); |
3721 | ||
97c4a07d | 3722 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
3723 | return strndup(s+1, l-2); |
3724 | ||
3725 | return strdup(s); | |
3726 | } | |
3727 | ||
5f7c426e | 3728 | char *normalize_env_assignment(const char *s) { |
f4934dfa LP |
3729 | _cleanup_free_ char *value = NULL; |
3730 | const char *eq; | |
3731 | char *p, *name; | |
5f7c426e | 3732 | |
57f30678 LP |
3733 | eq = strchr(s, '='); |
3734 | if (!eq) { | |
f4934dfa | 3735 | char *r, *t; |
5f7c426e | 3736 | |
57f30678 LP |
3737 | r = strdup(s); |
3738 | if (!r) | |
5f7c426e LP |
3739 | return NULL; |
3740 | ||
57f30678 | 3741 | t = strstrip(r); |
f4934dfa LP |
3742 | if (t != r) |
3743 | memmove(r, t, strlen(t) + 1); | |
57f30678 | 3744 | |
57f30678 | 3745 | return r; |
5f7c426e LP |
3746 | } |
3747 | ||
f4934dfa LP |
3748 | name = strndupa(s, eq - s); |
3749 | p = strdupa(eq + 1); | |
5f7c426e LP |
3750 | |
3751 | value = unquote(strstrip(p), QUOTES); | |
57f30678 | 3752 | if (!value) |
5f7c426e | 3753 | return NULL; |
5f7c426e | 3754 | |
f4934dfa | 3755 | return strjoin(strstrip(name), "=", value, NULL); |
5f7c426e LP |
3756 | } |
3757 | ||
8e12a6ae | 3758 | int wait_for_terminate(pid_t pid, siginfo_t *status) { |
1968a360 LP |
3759 | siginfo_t dummy; |
3760 | ||
2e78aa99 | 3761 | assert(pid >= 1); |
1968a360 LP |
3762 | |
3763 | if (!status) | |
3764 | status = &dummy; | |
2e78aa99 LP |
3765 | |
3766 | for (;;) { | |
8e12a6ae LP |
3767 | zero(*status); |
3768 | ||
3769 | if (waitid(P_PID, pid, status, WEXITED) < 0) { | |
2e78aa99 LP |
3770 | |
3771 | if (errno == EINTR) | |
3772 | continue; | |
3773 | ||
3774 | return -errno; | |
3775 | } | |
3776 | ||
3777 | return 0; | |
3778 | } | |
3779 | } | |
3780 | ||
0659e8ba LS |
3781 | /* |
3782 | * Return values: | |
3783 | * < 0 : wait_for_terminate() failed to get the state of the | |
3784 | * process, the process was terminated by a signal, or | |
3785 | * failed for an unknown reason. | |
3786 | * >=0 : The process terminated normally, and its exit code is | |
3787 | * returned. | |
3788 | * | |
3789 | * That is, success is indicated by a return value of zero, and an | |
3790 | * error is indicated by a non-zero value. | |
820d3acf ZJS |
3791 | * |
3792 | * A warning is emitted if the process terminates abnormally, | |
3793 | * and also if it returns non-zero unless check_exit_code is true. | |
0659e8ba | 3794 | */ |
820d3acf | 3795 | int wait_for_terminate_and_warn(const char *name, pid_t pid, bool check_exit_code) { |
97c4a07d LP |
3796 | int r; |
3797 | siginfo_t status; | |
3798 | ||
3799 | assert(name); | |
3800 | assert(pid > 1); | |
3801 | ||
d87be9b0 | 3802 | r = wait_for_terminate(pid, &status); |
f647962d MS |
3803 | if (r < 0) |
3804 | return log_warning_errno(r, "Failed to wait for %s: %m", name); | |
97c4a07d LP |
3805 | |
3806 | if (status.si_code == CLD_EXITED) { | |
820d3acf ZJS |
3807 | if (status.si_status != 0) |
3808 | log_full(check_exit_code ? LOG_WARNING : LOG_DEBUG, | |
3809 | "%s failed with error code %i.", name, status.si_status); | |
3810 | else | |
3811 | log_debug("%s succeeded.", name); | |
97c4a07d | 3812 | |
820d3acf | 3813 | return status.si_status; |
97c4a07d LP |
3814 | } else if (status.si_code == CLD_KILLED || |
3815 | status.si_code == CLD_DUMPED) { | |
3816 | ||
3817 | log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status)); | |
3818 | return -EPROTO; | |
3819 | } | |
3820 | ||
3821 | log_warning("%s failed due to unknown reason.", name); | |
3822 | return -EPROTO; | |
97c4a07d LP |
3823 | } |
3824 | ||
919ce0b7 | 3825 | noreturn void freeze(void) { |
720ce21d LP |
3826 | |
3827 | /* Make sure nobody waits for us on a socket anymore */ | |
3828 | close_all_fds(NULL, 0); | |
3829 | ||
c29597a1 LP |
3830 | sync(); |
3831 | ||
3c14d26c LP |
3832 | for (;;) |
3833 | pause(); | |
3834 | } | |
3835 | ||
00dc5d76 LP |
3836 | bool null_or_empty(struct stat *st) { |
3837 | assert(st); | |
3838 | ||
3839 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
3840 | return true; | |
3841 | ||
c8f26f42 | 3842 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
3843 | return true; |
3844 | ||
3845 | return false; | |
3846 | } | |
3847 | ||
83096483 LP |
3848 | int null_or_empty_path(const char *fn) { |
3849 | struct stat st; | |
3850 | ||
3851 | assert(fn); | |
3852 | ||
3853 | if (stat(fn, &st) < 0) | |
3854 | return -errno; | |
3855 | ||
3856 | return null_or_empty(&st); | |
3857 | } | |
3858 | ||
ed88bcfb ZJS |
3859 | int null_or_empty_fd(int fd) { |
3860 | struct stat st; | |
3861 | ||
3862 | assert(fd >= 0); | |
3863 | ||
3864 | if (fstat(fd, &st) < 0) | |
3865 | return -errno; | |
3866 | ||
3867 | return null_or_empty(&st); | |
3868 | } | |
3869 | ||
a247755d | 3870 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
3871 | int nfd; |
3872 | DIR *d; | |
3873 | ||
dd94c17e LP |
3874 | assert(!(flags & O_CREAT)); |
3875 | ||
3876 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
73836c5c | 3877 | if (nfd < 0) |
c4731d11 LP |
3878 | return NULL; |
3879 | ||
73836c5c LP |
3880 | d = fdopendir(nfd); |
3881 | if (!d) { | |
03e334a1 | 3882 | safe_close(nfd); |
c4731d11 LP |
3883 | return NULL; |
3884 | } | |
3885 | ||
3886 | return d; | |
3b63d2d3 LP |
3887 | } |
3888 | ||
8a0867d6 LP |
3889 | int signal_from_string_try_harder(const char *s) { |
3890 | int signo; | |
3891 | assert(s); | |
3892 | ||
73836c5c LP |
3893 | signo = signal_from_string(s); |
3894 | if (signo <= 0) | |
8a0867d6 LP |
3895 | if (startswith(s, "SIG")) |
3896 | return signal_from_string(s+3); | |
3897 | ||
3898 | return signo; | |
3899 | } | |
3900 | ||
383182b5 | 3901 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
22f5f628 | 3902 | _cleanup_free_ char *t = NULL, *u = NULL; |
22f5f628 | 3903 | size_t enc_len; |
e23a0ce8 | 3904 | |
383182b5 | 3905 | u = unquote(tagvalue, "\"\'"); |
6db615c1 | 3906 | if (!u) |
383182b5 | 3907 | return NULL; |
e23a0ce8 | 3908 | |
1d5989fd | 3909 | enc_len = strlen(u) * 4 + 1; |
22f5f628 | 3910 | t = new(char, enc_len); |
6db615c1 | 3911 | if (!t) |
383182b5 | 3912 | return NULL; |
e23a0ce8 | 3913 | |
8f6ce71f | 3914 | if (encode_devnode_name(u, t, enc_len) < 0) |
22f5f628 | 3915 | return NULL; |
e23a0ce8 | 3916 | |
6db615c1 | 3917 | return strjoin("/dev/disk/by-", by, "/", t, NULL); |
383182b5 | 3918 | } |
e23a0ce8 | 3919 | |
383182b5 | 3920 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
3921 | assert(p); |
3922 | ||
383182b5 DR |
3923 | if (startswith(p, "LABEL=")) |
3924 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 3925 | |
383182b5 DR |
3926 | if (startswith(p, "UUID=")) |
3927 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 3928 | |
84cc2abf DR |
3929 | if (startswith(p, "PARTUUID=")) |
3930 | return tag_to_udev_node(p+9, "partuuid"); | |
3931 | ||
3932 | if (startswith(p, "PARTLABEL=")) | |
3933 | return tag_to_udev_node(p+10, "partlabel"); | |
3934 | ||
e23a0ce8 LP |
3935 | return strdup(p); |
3936 | } | |
3937 | ||
f212ac12 LP |
3938 | bool tty_is_vc(const char *tty) { |
3939 | assert(tty); | |
3940 | ||
98a28fef LP |
3941 | return vtnr_from_tty(tty) >= 0; |
3942 | } | |
3943 | ||
d1122ad5 LP |
3944 | bool tty_is_console(const char *tty) { |
3945 | assert(tty); | |
3946 | ||
3947 | if (startswith(tty, "/dev/")) | |
3948 | tty += 5; | |
3949 | ||
3950 | return streq(tty, "console"); | |
3951 | } | |
3952 | ||
98a28fef LP |
3953 | int vtnr_from_tty(const char *tty) { |
3954 | int i, r; | |
3955 | ||
3956 | assert(tty); | |
3957 | ||
3958 | if (startswith(tty, "/dev/")) | |
3959 | tty += 5; | |
3960 | ||
3961 | if (!startswith(tty, "tty") ) | |
3962 | return -EINVAL; | |
3963 | ||
3964 | if (tty[3] < '0' || tty[3] > '9') | |
3965 | return -EINVAL; | |
3966 | ||
3967 | r = safe_atoi(tty+3, &i); | |
3968 | if (r < 0) | |
3969 | return r; | |
3970 | ||
3971 | if (i < 0 || i > 63) | |
3972 | return -EINVAL; | |
3973 | ||
3974 | return i; | |
f212ac12 LP |
3975 | } |
3976 | ||
21baf21a MS |
3977 | char *resolve_dev_console(char **active) { |
3978 | char *tty; | |
3979 | ||
3980 | /* Resolve where /dev/console is pointing to, if /sys is actually ours | |
3981 | * (i.e. not read-only-mounted which is a sign for container setups) */ | |
3982 | ||
3983 | if (path_is_read_only_fs("/sys") > 0) | |
3984 | return NULL; | |
3985 | ||
3986 | if (read_one_line_file("/sys/class/tty/console/active", active) < 0) | |
3987 | return NULL; | |
3988 | ||
3989 | /* If multiple log outputs are configured the last one is what | |
3990 | * /dev/console points to */ | |
3991 | tty = strrchr(*active, ' '); | |
3992 | if (tty) | |
3993 | tty++; | |
3994 | else | |
3995 | tty = *active; | |
3996 | ||
8aa5429a OB |
3997 | if (streq(tty, "tty0")) { |
3998 | char *tmp; | |
3999 | ||
4000 | /* Get the active VC (e.g. tty1) */ | |
4001 | if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) { | |
4002 | free(*active); | |
4003 | tty = *active = tmp; | |
4004 | } | |
4005 | } | |
4006 | ||
21baf21a MS |
4007 | return tty; |
4008 | } | |
4009 | ||
3043935f | 4010 | bool tty_is_vc_resolve(const char *tty) { |
9588bc32 | 4011 | _cleanup_free_ char *active = NULL; |
3030ccd7 | 4012 | |
e3aa71c3 LP |
4013 | assert(tty); |
4014 | ||
4015 | if (startswith(tty, "/dev/")) | |
4016 | tty += 5; | |
4017 | ||
21baf21a MS |
4018 | if (streq(tty, "console")) { |
4019 | tty = resolve_dev_console(&active); | |
4020 | if (!tty) | |
4021 | return false; | |
4022 | } | |
3030ccd7 | 4023 | |
9588bc32 | 4024 | return tty_is_vc(tty); |
3043935f LP |
4025 | } |
4026 | ||
4027 | const char *default_term_for_tty(const char *tty) { | |
4028 | assert(tty); | |
4029 | ||
3c4230a5 | 4030 | return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt220"; |
e3aa71c3 LP |
4031 | } |
4032 | ||
87d2c1ff | 4033 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
4034 | assert(de); |
4035 | ||
a34bf9db | 4036 | if (hidden_file(de->d_name)) |
fb19a739 LP |
4037 | return false; |
4038 | ||
4039 | if (de->d_type != DT_REG && | |
4040 | de->d_type != DT_LNK && | |
4041 | de->d_type != DT_UNKNOWN) | |
4042 | return false; | |
4043 | ||
4044 | return true; | |
4045 | } | |
4046 | ||
87d2c1ff LP |
4047 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
4048 | assert(de); | |
4049 | ||
a228a22f LP |
4050 | if (de->d_type != DT_REG && |
4051 | de->d_type != DT_LNK && | |
4052 | de->d_type != DT_UNKNOWN) | |
4053 | return false; | |
4054 | ||
a34bf9db | 4055 | if (hidden_file_allow_backup(de->d_name)) |
87d2c1ff LP |
4056 | return false; |
4057 | ||
4058 | return endswith(de->d_name, suffix); | |
4059 | } | |
4060 | ||
e801700e | 4061 | static int do_execute(char **directories, usec_t timeout, char *argv[]) { |
49681057 | 4062 | _cleanup_hashmap_free_free_ Hashmap *pids = NULL; |
e801700e ZJS |
4063 | _cleanup_set_free_free_ Set *seen = NULL; |
4064 | char **directory; | |
83cc030f | 4065 | |
49681057 ZJS |
4066 | /* We fork this all off from a child process so that we can |
4067 | * somewhat cleanly make use of SIGALRM to set a time limit */ | |
83cc030f | 4068 | |
49681057 ZJS |
4069 | reset_all_signal_handlers(); |
4070 | reset_signal_mask(); | |
83cc030f | 4071 | |
49681057 | 4072 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 4073 | |
49681057 ZJS |
4074 | pids = hashmap_new(NULL); |
4075 | if (!pids) | |
4076 | return log_oom(); | |
83cc030f | 4077 | |
e801700e ZJS |
4078 | seen = set_new(&string_hash_ops); |
4079 | if (!seen) | |
4080 | return log_oom(); | |
83cc030f | 4081 | |
e801700e ZJS |
4082 | STRV_FOREACH(directory, directories) { |
4083 | _cleanup_closedir_ DIR *d; | |
4084 | struct dirent *de; | |
83cc030f | 4085 | |
e801700e ZJS |
4086 | d = opendir(*directory); |
4087 | if (!d) { | |
4088 | if (errno == ENOENT) | |
4089 | continue; | |
83cc030f | 4090 | |
e801700e ZJS |
4091 | return log_error_errno(errno, "Failed to open directory %s: %m", *directory); |
4092 | } | |
83cc030f | 4093 | |
e801700e ZJS |
4094 | FOREACH_DIRENT(de, d, break) { |
4095 | _cleanup_free_ char *path = NULL; | |
4096 | pid_t pid; | |
4097 | int r; | |
4098 | ||
4099 | if (!dirent_is_file(de)) | |
4100 | continue; | |
83cc030f | 4101 | |
e801700e ZJS |
4102 | if (set_contains(seen, de->d_name)) { |
4103 | log_debug("%1$s/%2$s skipped (%2$s was already seen).", *directory, de->d_name); | |
4104 | continue; | |
4105 | } | |
4106 | ||
4107 | r = set_put_strdup(seen, de->d_name); | |
4108 | if (r < 0) | |
4109 | return log_oom(); | |
4110 | ||
4111 | path = strjoin(*directory, "/", de->d_name, NULL); | |
4112 | if (!path) | |
4113 | return log_oom(); | |
4114 | ||
4115 | if (null_or_empty_path(path)) { | |
4116 | log_debug("%s is empty (a mask).", path); | |
4117 | continue; | |
49681057 | 4118 | } else |
e801700e | 4119 | log_debug("%s will be executed.", path); |
83cc030f | 4120 | |
e801700e ZJS |
4121 | pid = fork(); |
4122 | if (pid < 0) { | |
4123 | log_error_errno(errno, "Failed to fork: %m"); | |
4124 | continue; | |
4125 | } else if (pid == 0) { | |
4126 | char *_argv[2]; | |
83cc030f | 4127 | |
e801700e | 4128 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 4129 | |
e801700e ZJS |
4130 | if (!argv) { |
4131 | _argv[0] = path; | |
4132 | _argv[1] = NULL; | |
4133 | argv = _argv; | |
4134 | } else | |
4135 | argv[0] = path; | |
4136 | ||
4137 | execv(path, argv); | |
4138 | return log_error_errno(errno, "Failed to execute %s: %m", path); | |
4139 | } | |
4140 | ||
4141 | log_debug("Spawned %s as " PID_FMT ".", path, pid); | |
83cc030f | 4142 | |
e801700e ZJS |
4143 | r = hashmap_put(pids, UINT_TO_PTR(pid), path); |
4144 | if (r < 0) | |
4145 | return log_oom(); | |
4146 | path = NULL; | |
4147 | } | |
49681057 | 4148 | } |
83cc030f | 4149 | |
49681057 ZJS |
4150 | /* Abort execution of this process after the timout. We simply |
4151 | * rely on SIGALRM as default action terminating the process, | |
4152 | * and turn on alarm(). */ | |
83cc030f | 4153 | |
49681057 ZJS |
4154 | if (timeout != USEC_INFINITY) |
4155 | alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC); | |
83cc030f | 4156 | |
49681057 ZJS |
4157 | while (!hashmap_isempty(pids)) { |
4158 | _cleanup_free_ char *path = NULL; | |
4159 | pid_t pid; | |
aa62a893 | 4160 | |
49681057 ZJS |
4161 | pid = PTR_TO_UINT(hashmap_first_key(pids)); |
4162 | assert(pid > 0); | |
83cc030f | 4163 | |
49681057 ZJS |
4164 | path = hashmap_remove(pids, UINT_TO_PTR(pid)); |
4165 | assert(path); | |
aa62a893 | 4166 | |
49681057 ZJS |
4167 | wait_for_terminate_and_warn(path, pid, true); |
4168 | } | |
aa62a893 | 4169 | |
49681057 ZJS |
4170 | return 0; |
4171 | } | |
aa62a893 | 4172 | |
e801700e | 4173 | void execute_directories(const char* const* directories, usec_t timeout, char *argv[]) { |
49681057 ZJS |
4174 | pid_t executor_pid; |
4175 | int r; | |
e801700e ZJS |
4176 | char *name; |
4177 | char **dirs = (char**) directories; | |
4178 | ||
4179 | assert(!strv_isempty(dirs)); | |
83cc030f | 4180 | |
e801700e ZJS |
4181 | name = basename(dirs[0]); |
4182 | assert(!isempty(name)); | |
aa62a893 | 4183 | |
e801700e ZJS |
4184 | /* Executes all binaries in the directories in parallel and waits |
4185 | * for them to finish. Optionally a timeout is applied. If a file | |
4186 | * with the same name exists in more than one directory, the | |
4187 | * earliest one wins. */ | |
83cc030f | 4188 | |
49681057 ZJS |
4189 | executor_pid = fork(); |
4190 | if (executor_pid < 0) { | |
4191 | log_error_errno(errno, "Failed to fork: %m"); | |
4192 | return; | |
4193 | ||
4194 | } else if (executor_pid == 0) { | |
e801700e | 4195 | r = do_execute(dirs, timeout, argv); |
49681057 | 4196 | _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS); |
aa62a893 | 4197 | } |
83cc030f | 4198 | |
e801700e | 4199 | wait_for_terminate_and_warn(name, executor_pid, true); |
83cc030f LP |
4200 | } |
4201 | ||
430c18ed LP |
4202 | int kill_and_sigcont(pid_t pid, int sig) { |
4203 | int r; | |
4204 | ||
4205 | r = kill(pid, sig) < 0 ? -errno : 0; | |
4206 | ||
4207 | if (r >= 0) | |
4208 | kill(pid, SIGCONT); | |
4209 | ||
4210 | return r; | |
4211 | } | |
4212 | ||
05feefe0 LP |
4213 | bool nulstr_contains(const char*nulstr, const char *needle) { |
4214 | const char *i; | |
4215 | ||
4216 | if (!nulstr) | |
4217 | return false; | |
4218 | ||
4219 | NULSTR_FOREACH(i, nulstr) | |
4220 | if (streq(i, needle)) | |
4221 | return true; | |
4222 | ||
4223 | return false; | |
4224 | } | |
4225 | ||
6faa1114 | 4226 | bool plymouth_running(void) { |
9408a2d2 | 4227 | return access("/run/plymouth/pid", F_OK) >= 0; |
6faa1114 LP |
4228 | } |
4229 | ||
9beb3f4d LP |
4230 | char* strshorten(char *s, size_t l) { |
4231 | assert(s); | |
4232 | ||
4233 | if (l < strlen(s)) | |
4234 | s[l] = 0; | |
4235 | ||
4236 | return s; | |
4237 | } | |
4238 | ||
4239 | static bool hostname_valid_char(char c) { | |
4240 | return | |
4241 | (c >= 'a' && c <= 'z') || | |
4242 | (c >= 'A' && c <= 'Z') || | |
4243 | (c >= '0' && c <= '9') || | |
4244 | c == '-' || | |
4245 | c == '_' || | |
4246 | c == '.'; | |
4247 | } | |
4248 | ||
4249 | bool hostname_is_valid(const char *s) { | |
4250 | const char *p; | |
aa3c5cf8 | 4251 | bool dot; |
9beb3f4d LP |
4252 | |
4253 | if (isempty(s)) | |
4254 | return false; | |
4255 | ||
40672b99 LP |
4256 | /* Doesn't accept empty hostnames, hostnames with trailing or |
4257 | * leading dots, and hostnames with multiple dots in a | |
4258 | * sequence. Also ensures that the length stays below | |
4259 | * HOST_NAME_MAX. */ | |
4260 | ||
aa3c5cf8 LP |
4261 | for (p = s, dot = true; *p; p++) { |
4262 | if (*p == '.') { | |
4263 | if (dot) | |
4264 | return false; | |
4265 | ||
4266 | dot = true; | |
4267 | } else { | |
4268 | if (!hostname_valid_char(*p)) | |
4269 | return false; | |
4270 | ||
4271 | dot = false; | |
4272 | } | |
4273 | } | |
4274 | ||
4275 | if (dot) | |
4276 | return false; | |
9beb3f4d LP |
4277 | |
4278 | if (p-s > HOST_NAME_MAX) | |
4279 | return false; | |
4280 | ||
4281 | return true; | |
4282 | } | |
4283 | ||
e724b063 | 4284 | char* hostname_cleanup(char *s, bool lowercase) { |
9beb3f4d | 4285 | char *p, *d; |
cec4ead9 LP |
4286 | bool dot; |
4287 | ||
4288 | for (p = s, d = s, dot = true; *p; p++) { | |
4289 | if (*p == '.') { | |
e724b063 | 4290 | if (dot) |
cec4ead9 | 4291 | continue; |
9beb3f4d | 4292 | |
e724b063 | 4293 | *(d++) = '.'; |
cec4ead9 | 4294 | dot = true; |
e724b063 LP |
4295 | } else if (hostname_valid_char(*p)) { |
4296 | *(d++) = lowercase ? tolower(*p) : *p; | |
cec4ead9 | 4297 | dot = false; |
e724b063 | 4298 | } |
cec4ead9 | 4299 | |
cec4ead9 | 4300 | } |
9beb3f4d | 4301 | |
e724b063 LP |
4302 | if (dot && d > s) |
4303 | d[-1] = 0; | |
4304 | else | |
4305 | *d = 0; | |
4306 | ||
9beb3f4d | 4307 | strshorten(s, HOST_NAME_MAX); |
cec4ead9 | 4308 | |
9beb3f4d LP |
4309 | return s; |
4310 | } | |
4311 | ||
7f0d207d LP |
4312 | bool machine_name_is_valid(const char *s) { |
4313 | ||
4314 | if (!hostname_is_valid(s)) | |
4315 | return false; | |
4316 | ||
4317 | /* Machine names should be useful hostnames, but also be | |
4318 | * useful in unit names, hence we enforce a stricter length | |
4319 | * limitation. */ | |
4320 | ||
4321 | if (strlen(s) > 64) | |
4322 | return false; | |
4323 | ||
4324 | return true; | |
4325 | } | |
4326 | ||
1325aa42 | 4327 | int pipe_eof(int fd) { |
b92bea5d ZJS |
4328 | struct pollfd pollfd = { |
4329 | .fd = fd, | |
4330 | .events = POLLIN|POLLHUP, | |
4331 | }; | |
1325aa42 | 4332 | |
d37a91e8 LP |
4333 | int r; |
4334 | ||
1325aa42 LP |
4335 | r = poll(&pollfd, 1, 0); |
4336 | if (r < 0) | |
4337 | return -errno; | |
4338 | ||
4339 | if (r == 0) | |
4340 | return 0; | |
4341 | ||
4342 | return pollfd.revents & POLLHUP; | |
4343 | } | |
4344 | ||
8f2d43a0 | 4345 | int fd_wait_for_event(int fd, int event, usec_t t) { |
968d3d24 | 4346 | |
b92bea5d ZJS |
4347 | struct pollfd pollfd = { |
4348 | .fd = fd, | |
4349 | .events = event, | |
4350 | }; | |
df50185b | 4351 | |
968d3d24 LP |
4352 | struct timespec ts; |
4353 | int r; | |
4354 | ||
3a43da28 | 4355 | r = ppoll(&pollfd, 1, t == USEC_INFINITY ? NULL : timespec_store(&ts, t), NULL); |
df50185b LP |
4356 | if (r < 0) |
4357 | return -errno; | |
4358 | ||
4359 | if (r == 0) | |
4360 | return 0; | |
4361 | ||
4362 | return pollfd.revents; | |
4363 | } | |
4364 | ||
5a3ab509 LP |
4365 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
4366 | FILE *f; | |
4367 | char *t; | |
ae6c3cc0 | 4368 | int r, fd; |
5a3ab509 LP |
4369 | |
4370 | assert(path); | |
4371 | assert(_f); | |
4372 | assert(_temp_path); | |
4373 | ||
ae6c3cc0 LP |
4374 | r = tempfn_xxxxxx(path, &t); |
4375 | if (r < 0) | |
4376 | return r; | |
5a3ab509 | 4377 | |
2d5bdf5b | 4378 | fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC); |
5a3ab509 LP |
4379 | if (fd < 0) { |
4380 | free(t); | |
4381 | return -errno; | |
4382 | } | |
4383 | ||
4384 | f = fdopen(fd, "we"); | |
4385 | if (!f) { | |
4386 | unlink(t); | |
4387 | free(t); | |
4388 | return -errno; | |
4389 | } | |
4390 | ||
4391 | *_f = f; | |
4392 | *_temp_path = t; | |
4393 | ||
4394 | return 0; | |
4395 | } | |
4396 | ||
6ea832a2 | 4397 | int terminal_vhangup_fd(int fd) { |
5a3ab509 LP |
4398 | assert(fd >= 0); |
4399 | ||
6ea832a2 LP |
4400 | if (ioctl(fd, TIOCVHANGUP) < 0) |
4401 | return -errno; | |
4402 | ||
4403 | return 0; | |
4404 | } | |
4405 | ||
4406 | int terminal_vhangup(const char *name) { | |
03e334a1 | 4407 | _cleanup_close_ int fd; |
6ea832a2 LP |
4408 | |
4409 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4410 | if (fd < 0) | |
4411 | return fd; | |
4412 | ||
03e334a1 | 4413 | return terminal_vhangup_fd(fd); |
6ea832a2 LP |
4414 | } |
4415 | ||
4416 | int vt_disallocate(const char *name) { | |
4417 | int fd, r; | |
4418 | unsigned u; | |
6ea832a2 LP |
4419 | |
4420 | /* Deallocate the VT if possible. If not possible | |
4421 | * (i.e. because it is the active one), at least clear it | |
4422 | * entirely (including the scrollback buffer) */ | |
4423 | ||
b83bc4e9 LP |
4424 | if (!startswith(name, "/dev/")) |
4425 | return -EINVAL; | |
4426 | ||
4427 | if (!tty_is_vc(name)) { | |
4428 | /* So this is not a VT. I guess we cannot deallocate | |
4429 | * it then. But let's at least clear the screen */ | |
4430 | ||
4431 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
4432 | if (fd < 0) | |
4433 | return fd; | |
4434 | ||
8585357a LP |
4435 | loop_write(fd, |
4436 | "\033[r" /* clear scrolling region */ | |
4437 | "\033[H" /* move home */ | |
4438 | "\033[2J", /* clear screen */ | |
4439 | 10, false); | |
03e334a1 | 4440 | safe_close(fd); |
b83bc4e9 LP |
4441 | |
4442 | return 0; | |
4443 | } | |
6ea832a2 LP |
4444 | |
4445 | if (!startswith(name, "/dev/tty")) | |
4446 | return -EINVAL; | |
4447 | ||
4448 | r = safe_atou(name+8, &u); | |
4449 | if (r < 0) | |
4450 | return r; | |
4451 | ||
4452 | if (u <= 0) | |
b83bc4e9 | 4453 | return -EINVAL; |
6ea832a2 | 4454 | |
b83bc4e9 | 4455 | /* Try to deallocate */ |
6ea832a2 LP |
4456 | fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC); |
4457 | if (fd < 0) | |
4458 | return fd; | |
4459 | ||
4460 | r = ioctl(fd, VT_DISALLOCATE, u); | |
03e334a1 | 4461 | safe_close(fd); |
6ea832a2 | 4462 | |
b83bc4e9 LP |
4463 | if (r >= 0) |
4464 | return 0; | |
6ea832a2 | 4465 | |
b83bc4e9 | 4466 | if (errno != EBUSY) |
6ea832a2 | 4467 | return -errno; |
6ea832a2 | 4468 | |
b83bc4e9 LP |
4469 | /* Couldn't deallocate, so let's clear it fully with |
4470 | * scrollback */ | |
4471 | fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC); | |
6ea832a2 | 4472 | if (fd < 0) |
b83bc4e9 | 4473 | return fd; |
6ea832a2 | 4474 | |
8585357a LP |
4475 | loop_write(fd, |
4476 | "\033[r" /* clear scrolling region */ | |
4477 | "\033[H" /* move home */ | |
4478 | "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */ | |
4479 | 10, false); | |
03e334a1 | 4480 | safe_close(fd); |
6ea832a2 | 4481 | |
b83bc4e9 | 4482 | return 0; |
6ea832a2 LP |
4483 | } |
4484 | ||
424a19f8 | 4485 | int symlink_atomic(const char *from, const char *to) { |
2e78fa79 | 4486 | _cleanup_free_ char *t = NULL; |
ae6c3cc0 | 4487 | int r; |
34ca941c LP |
4488 | |
4489 | assert(from); | |
4490 | assert(to); | |
4491 | ||
ae6c3cc0 LP |
4492 | r = tempfn_random(to, &t); |
4493 | if (r < 0) | |
4494 | return r; | |
34ca941c | 4495 | |
424a19f8 LP |
4496 | if (symlink(from, t) < 0) |
4497 | return -errno; | |
34ca941c LP |
4498 | |
4499 | if (rename(t, to) < 0) { | |
2e78fa79 LP |
4500 | unlink_noerrno(t); |
4501 | return -errno; | |
34ca941c LP |
4502 | } |
4503 | ||
424a19f8 | 4504 | return 0; |
34ca941c LP |
4505 | } |
4506 | ||
1554afae LP |
4507 | int mknod_atomic(const char *path, mode_t mode, dev_t dev) { |
4508 | _cleanup_free_ char *t = NULL; | |
ae6c3cc0 | 4509 | int r; |
1554afae LP |
4510 | |
4511 | assert(path); | |
4512 | ||
ae6c3cc0 LP |
4513 | r = tempfn_random(path, &t); |
4514 | if (r < 0) | |
4515 | return r; | |
1554afae LP |
4516 | |
4517 | if (mknod(t, mode, dev) < 0) | |
4518 | return -errno; | |
4519 | ||
4520 | if (rename(t, path) < 0) { | |
4521 | unlink_noerrno(t); | |
4522 | return -errno; | |
4523 | } | |
4524 | ||
4525 | return 0; | |
4526 | } | |
4527 | ||
4528 | int mkfifo_atomic(const char *path, mode_t mode) { | |
4529 | _cleanup_free_ char *t = NULL; | |
ae6c3cc0 | 4530 | int r; |
1554afae LP |
4531 | |
4532 | assert(path); | |
4533 | ||
ae6c3cc0 LP |
4534 | r = tempfn_random(path, &t); |
4535 | if (r < 0) | |
4536 | return r; | |
1554afae LP |
4537 | |
4538 | if (mkfifo(t, mode) < 0) | |
4539 | return -errno; | |
4540 | ||
4541 | if (rename(t, path) < 0) { | |
4542 | unlink_noerrno(t); | |
4543 | return -errno; | |
4544 | } | |
4545 | ||
4546 | return 0; | |
4547 | } | |
4548 | ||
4d6d6518 LP |
4549 | bool display_is_local(const char *display) { |
4550 | assert(display); | |
4551 | ||
4552 | return | |
4553 | display[0] == ':' && | |
4554 | display[1] >= '0' && | |
4555 | display[1] <= '9'; | |
4556 | } | |
4557 | ||
4558 | int socket_from_display(const char *display, char **path) { | |
4559 | size_t k; | |
4560 | char *f, *c; | |
4561 | ||
4562 | assert(display); | |
4563 | assert(path); | |
4564 | ||
4565 | if (!display_is_local(display)) | |
4566 | return -EINVAL; | |
4567 | ||
4568 | k = strspn(display+1, "0123456789"); | |
4569 | ||
f8294e41 | 4570 | f = new(char, strlen("/tmp/.X11-unix/X") + k + 1); |
4d6d6518 LP |
4571 | if (!f) |
4572 | return -ENOMEM; | |
4573 | ||
4574 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
4575 | memcpy(c, display+1, k); | |
4576 | c[k] = 0; | |
4577 | ||
4578 | *path = f; | |
4579 | ||
4580 | return 0; | |
4581 | } | |
4582 | ||
d05c5031 LP |
4583 | int get_user_creds( |
4584 | const char **username, | |
4585 | uid_t *uid, gid_t *gid, | |
4586 | const char **home, | |
4587 | const char **shell) { | |
4588 | ||
1cccf435 | 4589 | struct passwd *p; |
ddd88763 | 4590 | uid_t u; |
1cccf435 MV |
4591 | |
4592 | assert(username); | |
4593 | assert(*username); | |
1cccf435 MV |
4594 | |
4595 | /* We enforce some special rules for uid=0: in order to avoid | |
4596 | * NSS lookups for root we hardcode its data. */ | |
4597 | ||
4598 | if (streq(*username, "root") || streq(*username, "0")) { | |
4599 | *username = "root"; | |
4b67834e LP |
4600 | |
4601 | if (uid) | |
4602 | *uid = 0; | |
4603 | ||
4604 | if (gid) | |
4605 | *gid = 0; | |
4606 | ||
4607 | if (home) | |
4608 | *home = "/root"; | |
d05c5031 LP |
4609 | |
4610 | if (shell) | |
4611 | *shell = "/bin/sh"; | |
4612 | ||
1cccf435 MV |
4613 | return 0; |
4614 | } | |
4615 | ||
ddd88763 | 4616 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 4617 | errno = 0; |
ddd88763 | 4618 | p = getpwuid(u); |
1cccf435 MV |
4619 | |
4620 | /* If there are multiple users with the same id, make | |
4621 | * sure to leave $USER to the configured value instead | |
4622 | * of the first occurrence in the database. However if | |
4623 | * the uid was configured by a numeric uid, then let's | |
4624 | * pick the real username from /etc/passwd. */ | |
4625 | if (p) | |
4626 | *username = p->pw_name; | |
4627 | } else { | |
4628 | errno = 0; | |
4629 | p = getpwnam(*username); | |
4630 | } | |
4631 | ||
4632 | if (!p) | |
8333c77e | 4633 | return errno > 0 ? -errno : -ESRCH; |
1cccf435 | 4634 | |
4b67834e LP |
4635 | if (uid) |
4636 | *uid = p->pw_uid; | |
4637 | ||
4638 | if (gid) | |
4639 | *gid = p->pw_gid; | |
4640 | ||
4641 | if (home) | |
4642 | *home = p->pw_dir; | |
4643 | ||
d05c5031 LP |
4644 | if (shell) |
4645 | *shell = p->pw_shell; | |
4646 | ||
4b67834e LP |
4647 | return 0; |
4648 | } | |
4649 | ||
59164be4 LP |
4650 | char* uid_to_name(uid_t uid) { |
4651 | struct passwd *p; | |
4652 | char *r; | |
4653 | ||
4654 | if (uid == 0) | |
4655 | return strdup("root"); | |
4656 | ||
4657 | p = getpwuid(uid); | |
4658 | if (p) | |
4659 | return strdup(p->pw_name); | |
4660 | ||
de0671ee | 4661 | if (asprintf(&r, UID_FMT, uid) < 0) |
59164be4 LP |
4662 | return NULL; |
4663 | ||
4664 | return r; | |
4665 | } | |
4666 | ||
4468addc LP |
4667 | char* gid_to_name(gid_t gid) { |
4668 | struct group *p; | |
4669 | char *r; | |
4670 | ||
4671 | if (gid == 0) | |
4672 | return strdup("root"); | |
4673 | ||
4674 | p = getgrgid(gid); | |
4675 | if (p) | |
4676 | return strdup(p->gr_name); | |
4677 | ||
de0671ee | 4678 | if (asprintf(&r, GID_FMT, gid) < 0) |
4468addc LP |
4679 | return NULL; |
4680 | ||
4681 | return r; | |
4682 | } | |
4683 | ||
4b67834e LP |
4684 | int get_group_creds(const char **groupname, gid_t *gid) { |
4685 | struct group *g; | |
4686 | gid_t id; | |
4687 | ||
4688 | assert(groupname); | |
4689 | ||
4690 | /* We enforce some special rules for gid=0: in order to avoid | |
4691 | * NSS lookups for root we hardcode its data. */ | |
4692 | ||
4693 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
4694 | *groupname = "root"; | |
4695 | ||
4696 | if (gid) | |
4697 | *gid = 0; | |
4698 | ||
4699 | return 0; | |
4700 | } | |
4701 | ||
4702 | if (parse_gid(*groupname, &id) >= 0) { | |
4703 | errno = 0; | |
4704 | g = getgrgid(id); | |
4705 | ||
4706 | if (g) | |
4707 | *groupname = g->gr_name; | |
4708 | } else { | |
4709 | errno = 0; | |
4710 | g = getgrnam(*groupname); | |
4711 | } | |
4712 | ||
4713 | if (!g) | |
8333c77e | 4714 | return errno > 0 ? -errno : -ESRCH; |
4b67834e LP |
4715 | |
4716 | if (gid) | |
4717 | *gid = g->gr_gid; | |
4718 | ||
1cccf435 MV |
4719 | return 0; |
4720 | } | |
4721 | ||
4468addc LP |
4722 | int in_gid(gid_t gid) { |
4723 | gid_t *gids; | |
43673799 LP |
4724 | int ngroups_max, r, i; |
4725 | ||
43673799 LP |
4726 | if (getgid() == gid) |
4727 | return 1; | |
4728 | ||
4729 | if (getegid() == gid) | |
4730 | return 1; | |
4731 | ||
4732 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
4733 | assert(ngroups_max > 0); | |
4734 | ||
4735 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
4736 | ||
4737 | r = getgroups(ngroups_max, gids); | |
4738 | if (r < 0) | |
4739 | return -errno; | |
4740 | ||
4741 | for (i = 0; i < r; i++) | |
4742 | if (gids[i] == gid) | |
4743 | return 1; | |
4744 | ||
4745 | return 0; | |
4746 | } | |
4747 | ||
4468addc LP |
4748 | int in_group(const char *name) { |
4749 | int r; | |
4750 | gid_t gid; | |
4751 | ||
4752 | r = get_group_creds(&name, &gid); | |
4753 | if (r < 0) | |
4754 | return r; | |
4755 | ||
4756 | return in_gid(gid); | |
4757 | } | |
4758 | ||
8092a428 | 4759 | int glob_exists(const char *path) { |
7fd1b19b | 4760 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 4761 | int k; |
8092a428 LP |
4762 | |
4763 | assert(path); | |
4764 | ||
8092a428 LP |
4765 | errno = 0; |
4766 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
4767 | ||
4768 | if (k == GLOB_NOMATCH) | |
8d98da3f | 4769 | return 0; |
8092a428 | 4770 | else if (k == GLOB_NOSPACE) |
8d98da3f | 4771 | return -ENOMEM; |
8092a428 | 4772 | else if (k == 0) |
8d98da3f | 4773 | return !strv_isempty(g.gl_pathv); |
8092a428 | 4774 | else |
8d98da3f ZJS |
4775 | return errno ? -errno : -EIO; |
4776 | } | |
8092a428 | 4777 | |
8d98da3f ZJS |
4778 | int glob_extend(char ***strv, const char *path) { |
4779 | _cleanup_globfree_ glob_t g = {}; | |
4780 | int k; | |
4781 | char **p; | |
4782 | ||
4783 | errno = 0; | |
a8ccacf5 | 4784 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
4785 | |
4786 | if (k == GLOB_NOMATCH) | |
4787 | return -ENOENT; | |
4788 | else if (k == GLOB_NOSPACE) | |
4789 | return -ENOMEM; | |
4790 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
4791 | return errno ? -errno : -EIO; | |
4792 | ||
4793 | STRV_FOREACH(p, g.gl_pathv) { | |
4794 | k = strv_extend(strv, *p); | |
4795 | if (k < 0) | |
4796 | break; | |
4797 | } | |
4798 | ||
4799 | return k; | |
8092a428 LP |
4800 | } |
4801 | ||
83096483 LP |
4802 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
4803 | struct stat st; | |
4804 | ||
4805 | assert(d); | |
4806 | assert(de); | |
4807 | ||
4808 | if (de->d_type != DT_UNKNOWN) | |
4809 | return 0; | |
4810 | ||
4811 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
4812 | return -errno; | |
4813 | ||
4814 | de->d_type = | |
4815 | S_ISREG(st.st_mode) ? DT_REG : | |
4816 | S_ISDIR(st.st_mode) ? DT_DIR : | |
4817 | S_ISLNK(st.st_mode) ? DT_LNK : | |
4818 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
4819 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
4820 | S_ISCHR(st.st_mode) ? DT_CHR : | |
4821 | S_ISBLK(st.st_mode) ? DT_BLK : | |
4822 | DT_UNKNOWN; | |
4823 | ||
4824 | return 0; | |
4825 | } | |
4826 | ||
034a2a52 | 4827 | int get_files_in_directory(const char *path, char ***list) { |
893fa014 ZJS |
4828 | _cleanup_closedir_ DIR *d = NULL; |
4829 | size_t bufsize = 0, n = 0; | |
4830 | _cleanup_strv_free_ char **l = NULL; | |
034a2a52 LP |
4831 | |
4832 | assert(path); | |
d60ef526 LP |
4833 | |
4834 | /* Returns all files in a directory in *list, and the number | |
4835 | * of files as return value. If list is NULL returns only the | |
893fa014 | 4836 | * number. */ |
034a2a52 LP |
4837 | |
4838 | d = opendir(path); | |
8ea913b2 LP |
4839 | if (!d) |
4840 | return -errno; | |
4841 | ||
034a2a52 | 4842 | for (;;) { |
7d5e9c0f | 4843 | struct dirent *de; |
034a2a52 | 4844 | |
3fd11280 FW |
4845 | errno = 0; |
4846 | de = readdir(d); | |
4847 | if (!de && errno != 0) | |
4848 | return -errno; | |
034a2a52 LP |
4849 | if (!de) |
4850 | break; | |
4851 | ||
4852 | dirent_ensure_type(d, de); | |
4853 | ||
4854 | if (!dirent_is_file(de)) | |
4855 | continue; | |
4856 | ||
d60ef526 | 4857 | if (list) { |
893fa014 ZJS |
4858 | /* one extra slot is needed for the terminating NULL */ |
4859 | if (!GREEDY_REALLOC(l, bufsize, n + 2)) | |
4860 | return -ENOMEM; | |
034a2a52 | 4861 | |
893fa014 ZJS |
4862 | l[n] = strdup(de->d_name); |
4863 | if (!l[n]) | |
4864 | return -ENOMEM; | |
034a2a52 | 4865 | |
893fa014 | 4866 | l[++n] = NULL; |
d60ef526 | 4867 | } else |
893fa014 | 4868 | n++; |
034a2a52 LP |
4869 | } |
4870 | ||
893fa014 ZJS |
4871 | if (list) { |
4872 | *list = l; | |
4873 | l = NULL; /* avoid freeing */ | |
4874 | } | |
034a2a52 | 4875 | |
893fa014 | 4876 | return n; |
034a2a52 LP |
4877 | } |
4878 | ||
b7def684 | 4879 | char *strjoin(const char *x, ...) { |
911a4828 LP |
4880 | va_list ap; |
4881 | size_t l; | |
4882 | char *r, *p; | |
4883 | ||
4884 | va_start(ap, x); | |
4885 | ||
4886 | if (x) { | |
4887 | l = strlen(x); | |
4888 | ||
4889 | for (;;) { | |
4890 | const char *t; | |
040f18ea | 4891 | size_t n; |
911a4828 LP |
4892 | |
4893 | t = va_arg(ap, const char *); | |
4894 | if (!t) | |
4895 | break; | |
4896 | ||
040f18ea | 4897 | n = strlen(t); |
e98055de LN |
4898 | if (n > ((size_t) -1) - l) { |
4899 | va_end(ap); | |
040f18ea | 4900 | return NULL; |
e98055de | 4901 | } |
040f18ea LP |
4902 | |
4903 | l += n; | |
911a4828 LP |
4904 | } |
4905 | } else | |
4906 | l = 0; | |
4907 | ||
4908 | va_end(ap); | |
4909 | ||
4910 | r = new(char, l+1); | |
4911 | if (!r) | |
4912 | return NULL; | |
4913 | ||
4914 | if (x) { | |
4915 | p = stpcpy(r, x); | |
4916 | ||
4917 | va_start(ap, x); | |
4918 | ||
4919 | for (;;) { | |
4920 | const char *t; | |
4921 | ||
4922 | t = va_arg(ap, const char *); | |
4923 | if (!t) | |
4924 | break; | |
4925 | ||
4926 | p = stpcpy(p, t); | |
4927 | } | |
8ea913b2 LP |
4928 | |
4929 | va_end(ap); | |
911a4828 LP |
4930 | } else |
4931 | r[0] = 0; | |
4932 | ||
4933 | return r; | |
4934 | } | |
4935 | ||
b636465b | 4936 | bool is_main_thread(void) { |
ec202eae | 4937 | static thread_local int cached = 0; |
b636465b LP |
4938 | |
4939 | if (_unlikely_(cached == 0)) | |
4940 | cached = getpid() == gettid() ? 1 : -1; | |
4941 | ||
4942 | return cached > 0; | |
4943 | } | |
4944 | ||
94959f0f LP |
4945 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
4946 | char *p, *s; | |
4947 | int r; | |
4948 | unsigned n, m; | |
4949 | ||
4950 | assert(ret); | |
4951 | ||
4952 | /* If it has a queue this is good enough for us */ | |
4953 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
4954 | return -ENOMEM; | |
4955 | ||
4956 | r = access(p, F_OK); | |
4957 | free(p); | |
4958 | ||
4959 | if (r >= 0) { | |
4960 | *ret = d; | |
4961 | return 0; | |
4962 | } | |
4963 | ||
4964 | /* If it is a partition find the originating device */ | |
4965 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
4966 | return -ENOMEM; | |
4967 | ||
4968 | r = access(p, F_OK); | |
4969 | free(p); | |
4970 | ||
4971 | if (r < 0) | |
4972 | return -ENOENT; | |
4973 | ||
4974 | /* Get parent dev_t */ | |
4975 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
4976 | return -ENOMEM; | |
4977 | ||
4978 | r = read_one_line_file(p, &s); | |
4979 | free(p); | |
4980 | ||
4981 | if (r < 0) | |
4982 | return r; | |
4983 | ||
4984 | r = sscanf(s, "%u:%u", &m, &n); | |
4985 | free(s); | |
4986 | ||
4987 | if (r != 2) | |
4988 | return -EINVAL; | |
4989 | ||
4990 | /* Only return this if it is really good enough for us. */ | |
4991 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
4992 | return -ENOMEM; | |
4993 | ||
4994 | r = access(p, F_OK); | |
4995 | free(p); | |
4996 | ||
4997 | if (r >= 0) { | |
4998 | *ret = makedev(m, n); | |
4999 | return 0; | |
5000 | } | |
5001 | ||
5002 | return -ENOENT; | |
5003 | } | |
5004 | ||
f41607a6 LP |
5005 | static const char *const ioprio_class_table[] = { |
5006 | [IOPRIO_CLASS_NONE] = "none", | |
5007 | [IOPRIO_CLASS_RT] = "realtime", | |
5008 | [IOPRIO_CLASS_BE] = "best-effort", | |
5009 | [IOPRIO_CLASS_IDLE] = "idle" | |
5010 | }; | |
5011 | ||
f8b69d1d | 5012 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
5013 | |
5014 | static const char *const sigchld_code_table[] = { | |
5015 | [CLD_EXITED] = "exited", | |
5016 | [CLD_KILLED] = "killed", | |
5017 | [CLD_DUMPED] = "dumped", | |
5018 | [CLD_TRAPPED] = "trapped", | |
5019 | [CLD_STOPPED] = "stopped", | |
5020 | [CLD_CONTINUED] = "continued", | |
5021 | }; | |
5022 | ||
5023 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
5024 | ||
5025 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
5026 | [LOG_FAC(LOG_KERN)] = "kern", | |
5027 | [LOG_FAC(LOG_USER)] = "user", | |
5028 | [LOG_FAC(LOG_MAIL)] = "mail", | |
5029 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
5030 | [LOG_FAC(LOG_AUTH)] = "auth", | |
5031 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
5032 | [LOG_FAC(LOG_LPR)] = "lpr", | |
5033 | [LOG_FAC(LOG_NEWS)] = "news", | |
5034 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
5035 | [LOG_FAC(LOG_CRON)] = "cron", | |
5036 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
5037 | [LOG_FAC(LOG_FTP)] = "ftp", | |
5038 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
5039 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
5040 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
5041 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
5042 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
5043 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
5044 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
5045 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
5046 | }; | |
5047 | ||
f8b69d1d | 5048 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
5049 | |
5050 | static const char *const log_level_table[] = { | |
5051 | [LOG_EMERG] = "emerg", | |
5052 | [LOG_ALERT] = "alert", | |
5053 | [LOG_CRIT] = "crit", | |
5054 | [LOG_ERR] = "err", | |
5055 | [LOG_WARNING] = "warning", | |
5056 | [LOG_NOTICE] = "notice", | |
5057 | [LOG_INFO] = "info", | |
5058 | [LOG_DEBUG] = "debug" | |
5059 | }; | |
5060 | ||
f8b69d1d | 5061 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
5062 | |
5063 | static const char* const sched_policy_table[] = { | |
5064 | [SCHED_OTHER] = "other", | |
5065 | [SCHED_BATCH] = "batch", | |
5066 | [SCHED_IDLE] = "idle", | |
5067 | [SCHED_FIFO] = "fifo", | |
5068 | [SCHED_RR] = "rr" | |
5069 | }; | |
5070 | ||
f8b69d1d | 5071 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 | 5072 | |
517d56b1 | 5073 | static const char* const rlimit_table[_RLIMIT_MAX] = { |
f41607a6 LP |
5074 | [RLIMIT_CPU] = "LimitCPU", |
5075 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
5076 | [RLIMIT_DATA] = "LimitDATA", | |
5077 | [RLIMIT_STACK] = "LimitSTACK", | |
5078 | [RLIMIT_CORE] = "LimitCORE", | |
5079 | [RLIMIT_RSS] = "LimitRSS", | |
5080 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
5081 | [RLIMIT_AS] = "LimitAS", | |
5082 | [RLIMIT_NPROC] = "LimitNPROC", | |
5083 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
5084 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
5085 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
5086 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
5087 | [RLIMIT_NICE] = "LimitNICE", | |
5088 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
5089 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
5090 | }; | |
5091 | ||
5092 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
5093 | ||
5094 | static const char* const ip_tos_table[] = { | |
5095 | [IPTOS_LOWDELAY] = "low-delay", | |
5096 | [IPTOS_THROUGHPUT] = "throughput", | |
5097 | [IPTOS_RELIABILITY] = "reliability", | |
5098 | [IPTOS_LOWCOST] = "low-cost", | |
5099 | }; | |
5100 | ||
f8b69d1d | 5101 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 5102 | |
4e240ab0 | 5103 | static const char *const __signal_table[] = { |
f41607a6 LP |
5104 | [SIGHUP] = "HUP", |
5105 | [SIGINT] = "INT", | |
5106 | [SIGQUIT] = "QUIT", | |
5107 | [SIGILL] = "ILL", | |
5108 | [SIGTRAP] = "TRAP", | |
5109 | [SIGABRT] = "ABRT", | |
5110 | [SIGBUS] = "BUS", | |
5111 | [SIGFPE] = "FPE", | |
5112 | [SIGKILL] = "KILL", | |
5113 | [SIGUSR1] = "USR1", | |
5114 | [SIGSEGV] = "SEGV", | |
5115 | [SIGUSR2] = "USR2", | |
5116 | [SIGPIPE] = "PIPE", | |
5117 | [SIGALRM] = "ALRM", | |
5118 | [SIGTERM] = "TERM", | |
5119 | #ifdef SIGSTKFLT | |
5120 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
5121 | #endif | |
5122 | [SIGCHLD] = "CHLD", | |
5123 | [SIGCONT] = "CONT", | |
5124 | [SIGSTOP] = "STOP", | |
5125 | [SIGTSTP] = "TSTP", | |
5126 | [SIGTTIN] = "TTIN", | |
5127 | [SIGTTOU] = "TTOU", | |
5128 | [SIGURG] = "URG", | |
5129 | [SIGXCPU] = "XCPU", | |
5130 | [SIGXFSZ] = "XFSZ", | |
5131 | [SIGVTALRM] = "VTALRM", | |
5132 | [SIGPROF] = "PROF", | |
5133 | [SIGWINCH] = "WINCH", | |
5134 | [SIGIO] = "IO", | |
5135 | [SIGPWR] = "PWR", | |
5136 | [SIGSYS] = "SYS" | |
5137 | }; | |
5138 | ||
4e240ab0 MS |
5139 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
5140 | ||
5141 | const char *signal_to_string(int signo) { | |
ec202eae | 5142 | static thread_local char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1]; |
4e240ab0 MS |
5143 | const char *name; |
5144 | ||
5145 | name = __signal_to_string(signo); | |
5146 | if (name) | |
5147 | return name; | |
5148 | ||
5149 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
fa70beaa | 5150 | snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN); |
4e240ab0 | 5151 | else |
fa70beaa LP |
5152 | snprintf(buf, sizeof(buf), "%d", signo); |
5153 | ||
4e240ab0 MS |
5154 | return buf; |
5155 | } | |
5156 | ||
5157 | int signal_from_string(const char *s) { | |
5158 | int signo; | |
5159 | int offset = 0; | |
5160 | unsigned u; | |
5161 | ||
040f18ea | 5162 | signo = __signal_from_string(s); |
4e240ab0 MS |
5163 | if (signo > 0) |
5164 | return signo; | |
5165 | ||
5166 | if (startswith(s, "RTMIN+")) { | |
5167 | s += 6; | |
5168 | offset = SIGRTMIN; | |
5169 | } | |
5170 | if (safe_atou(s, &u) >= 0) { | |
5171 | signo = (int) u + offset; | |
5172 | if (signo > 0 && signo < _NSIG) | |
5173 | return signo; | |
5174 | } | |
7e8185ef | 5175 | return -EINVAL; |
4e240ab0 | 5176 | } |
65457142 FC |
5177 | |
5178 | bool kexec_loaded(void) { | |
5179 | bool loaded = false; | |
5180 | char *s; | |
5181 | ||
5182 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
5183 | if (s[0] == '1') | |
5184 | loaded = true; | |
5185 | free(s); | |
5186 | } | |
5187 | return loaded; | |
5188 | } | |
fb9de93d | 5189 | |
87d2c1ff LP |
5190 | int prot_from_flags(int flags) { |
5191 | ||
5192 | switch (flags & O_ACCMODE) { | |
5193 | ||
5194 | case O_RDONLY: | |
5195 | return PROT_READ; | |
5196 | ||
5197 | case O_WRONLY: | |
5198 | return PROT_WRITE; | |
5199 | ||
5200 | case O_RDWR: | |
5201 | return PROT_READ|PROT_WRITE; | |
5202 | ||
5203 | default: | |
5204 | return -EINVAL; | |
5205 | } | |
7c99e0c1 | 5206 | } |
689b9a22 | 5207 | |
babfc091 | 5208 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 5209 | unsigned i; |
babfc091 LP |
5210 | |
5211 | static const struct { | |
5212 | const char *suffix; | |
5213 | off_t factor; | |
5214 | } table[] = { | |
32895bb3 LP |
5215 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
5216 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
5217 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
5218 | { "G", 1024ULL*1024ULL*1024ULL }, | |
5219 | { "M", 1024ULL*1024ULL }, | |
5220 | { "K", 1024ULL }, | |
5221 | }; | |
5222 | ||
f02ca522 LP |
5223 | if (t == (off_t) -1) |
5224 | return NULL; | |
5225 | ||
babfc091 LP |
5226 | for (i = 0; i < ELEMENTSOF(table); i++) { |
5227 | ||
5228 | if (t >= table[i].factor) { | |
5229 | snprintf(buf, l, | |
5230 | "%llu.%llu%s", | |
5231 | (unsigned long long) (t / table[i].factor), | |
5232 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
5233 | table[i].suffix); | |
5234 | ||
5235 | goto finish; | |
5236 | } | |
5237 | } | |
5238 | ||
5239 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
5240 | ||
5241 | finish: | |
5242 | buf[l-1] = 0; | |
5243 | return buf; | |
5244 | ||
5245 | } | |
55d7bfc1 LP |
5246 | |
5247 | void* memdup(const void *p, size_t l) { | |
5248 | void *r; | |
5249 | ||
5250 | assert(p); | |
5251 | ||
5252 | r = malloc(l); | |
5253 | if (!r) | |
5254 | return NULL; | |
5255 | ||
5256 | memcpy(r, p, l); | |
5257 | return r; | |
5258 | } | |
bb99a35a LP |
5259 | |
5260 | int fd_inc_sndbuf(int fd, size_t n) { | |
5261 | int r, value; | |
5262 | socklen_t l = sizeof(value); | |
5263 | ||
5264 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
92d75ca4 | 5265 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
5266 | return 0; |
5267 | ||
92d75ca4 LP |
5268 | /* If we have the privileges we will ignore the kernel limit. */ |
5269 | ||
bb99a35a | 5270 | value = (int) n; |
92d75ca4 LP |
5271 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) |
5272 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) | |
5273 | return -errno; | |
bb99a35a LP |
5274 | |
5275 | return 1; | |
5276 | } | |
5277 | ||
5278 | int fd_inc_rcvbuf(int fd, size_t n) { | |
5279 | int r, value; | |
5280 | socklen_t l = sizeof(value); | |
5281 | ||
5282 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
92d75ca4 | 5283 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
5284 | return 0; |
5285 | ||
92d75ca4 | 5286 | /* If we have the privileges we will ignore the kernel limit. */ |
bb99a35a | 5287 | |
92d75ca4 LP |
5288 | value = (int) n; |
5289 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) | |
5290 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) | |
5291 | return -errno; | |
bb99a35a LP |
5292 | return 1; |
5293 | } | |
6bb92a16 | 5294 | |
9bdc770c | 5295 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 | 5296 | bool stdout_is_tty, stderr_is_tty; |
8a7c93d8 LP |
5297 | pid_t parent_pid, agent_pid; |
5298 | sigset_t ss, saved_ss; | |
6bb92a16 LP |
5299 | unsigned n, i; |
5300 | va_list ap; | |
5301 | char **l; | |
5302 | ||
5303 | assert(pid); | |
5304 | assert(path); | |
5305 | ||
6bb92a16 LP |
5306 | /* Spawns a temporary TTY agent, making sure it goes away when |
5307 | * we go away */ | |
5308 | ||
8a7c93d8 LP |
5309 | parent_pid = getpid(); |
5310 | ||
5311 | /* First we temporarily block all signals, so that the new | |
5312 | * child has them blocked initially. This way, we can be sure | |
5313 | * that SIGTERMs are not lost we might send to the agent. */ | |
5314 | assert_se(sigfillset(&ss) >= 0); | |
5315 | assert_se(sigprocmask(SIG_SETMASK, &ss, &saved_ss) >= 0); | |
5316 | ||
6bb92a16 | 5317 | agent_pid = fork(); |
8a7c93d8 LP |
5318 | if (agent_pid < 0) { |
5319 | assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0); | |
6bb92a16 | 5320 | return -errno; |
8a7c93d8 | 5321 | } |
6bb92a16 LP |
5322 | |
5323 | if (agent_pid != 0) { | |
8a7c93d8 | 5324 | assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0); |
6bb92a16 LP |
5325 | *pid = agent_pid; |
5326 | return 0; | |
5327 | } | |
5328 | ||
5329 | /* In the child: | |
5330 | * | |
5331 | * Make sure the agent goes away when the parent dies */ | |
5332 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
5333 | _exit(EXIT_FAILURE); | |
5334 | ||
8a7c93d8 LP |
5335 | /* Make sure we actually can kill the agent, if we need to, in |
5336 | * case somebody invoked us from a shell script that trapped | |
5337 | * SIGTERM or so... */ | |
5338 | reset_all_signal_handlers(); | |
5339 | reset_signal_mask(); | |
5340 | ||
6bb92a16 | 5341 | /* Check whether our parent died before we were able |
8a7c93d8 | 5342 | * to set the death signal and unblock the signals */ |
6bb92a16 LP |
5343 | if (getppid() != parent_pid) |
5344 | _exit(EXIT_SUCCESS); | |
5345 | ||
5346 | /* Don't leak fds to the agent */ | |
9bdc770c | 5347 | close_all_fds(except, n_except); |
6bb92a16 LP |
5348 | |
5349 | stdout_is_tty = isatty(STDOUT_FILENO); | |
5350 | stderr_is_tty = isatty(STDERR_FILENO); | |
5351 | ||
5352 | if (!stdout_is_tty || !stderr_is_tty) { | |
8a7c93d8 LP |
5353 | int fd; |
5354 | ||
6bb92a16 LP |
5355 | /* Detach from stdout/stderr. and reopen |
5356 | * /dev/tty for them. This is important to | |
5357 | * ensure that when systemctl is started via | |
5358 | * popen() or a similar call that expects to | |
5359 | * read EOF we actually do generate EOF and | |
5360 | * not delay this indefinitely by because we | |
5361 | * keep an unused copy of stdin around. */ | |
5362 | fd = open("/dev/tty", O_WRONLY); | |
5363 | if (fd < 0) { | |
56f64d95 | 5364 | log_error_errno(errno, "Failed to open /dev/tty: %m"); |
6bb92a16 LP |
5365 | _exit(EXIT_FAILURE); |
5366 | } | |
5367 | ||
5368 | if (!stdout_is_tty) | |
5369 | dup2(fd, STDOUT_FILENO); | |
5370 | ||
5371 | if (!stderr_is_tty) | |
5372 | dup2(fd, STDERR_FILENO); | |
5373 | ||
5374 | if (fd > 2) | |
5375 | close(fd); | |
5376 | } | |
5377 | ||
5378 | /* Count arguments */ | |
5379 | va_start(ap, path); | |
5380 | for (n = 0; va_arg(ap, char*); n++) | |
5381 | ; | |
5382 | va_end(ap); | |
5383 | ||
5384 | /* Allocate strv */ | |
5385 | l = alloca(sizeof(char *) * (n + 1)); | |
5386 | ||
5387 | /* Fill in arguments */ | |
5388 | va_start(ap, path); | |
5389 | for (i = 0; i <= n; i++) | |
5390 | l[i] = va_arg(ap, char*); | |
5391 | va_end(ap); | |
5392 | ||
5393 | execv(path, l); | |
5394 | _exit(EXIT_FAILURE); | |
5395 | } | |
68faf98c LP |
5396 | |
5397 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
5398 | struct rlimit highest, fixed; | |
5399 | ||
5400 | assert(rlim); | |
5401 | ||
5402 | if (setrlimit(resource, rlim) >= 0) | |
5403 | return 0; | |
5404 | ||
5405 | if (errno != EPERM) | |
5406 | return -errno; | |
5407 | ||
5408 | /* So we failed to set the desired setrlimit, then let's try | |
5409 | * to get as close as we can */ | |
5410 | assert_se(getrlimit(resource, &highest) == 0); | |
5411 | ||
5412 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
5413 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
5414 | ||
5415 | if (setrlimit(resource, &fixed) < 0) | |
5416 | return -errno; | |
5417 | ||
5418 | return 0; | |
5419 | } | |
3d9a4122 | 5420 | |
ab94af92 | 5421 | int getenv_for_pid(pid_t pid, const char *field, char **_value) { |
49aa47c7 LP |
5422 | _cleanup_fclose_ FILE *f = NULL; |
5423 | char *value = NULL; | |
ab94af92 | 5424 | int r; |
ab94af92 LP |
5425 | bool done = false; |
5426 | size_t l; | |
49aa47c7 | 5427 | const char *path; |
ab94af92 | 5428 | |
49aa47c7 | 5429 | assert(pid >= 0); |
ab94af92 LP |
5430 | assert(field); |
5431 | assert(_value); | |
5432 | ||
b68fa010 | 5433 | path = procfs_file_alloca(pid, "environ"); |
ab94af92 LP |
5434 | |
5435 | f = fopen(path, "re"); | |
5436 | if (!f) | |
5437 | return -errno; | |
5438 | ||
5439 | l = strlen(field); | |
5440 | r = 0; | |
5441 | ||
5442 | do { | |
5443 | char line[LINE_MAX]; | |
5444 | unsigned i; | |
5445 | ||
5446 | for (i = 0; i < sizeof(line)-1; i++) { | |
5447 | int c; | |
5448 | ||
5449 | c = getc(f); | |
5450 | if (_unlikely_(c == EOF)) { | |
5451 | done = true; | |
5452 | break; | |
5453 | } else if (c == 0) | |
5454 | break; | |
5455 | ||
5456 | line[i] = c; | |
5457 | } | |
5458 | line[i] = 0; | |
5459 | ||
5460 | if (memcmp(line, field, l) == 0 && line[l] == '=') { | |
5461 | value = strdup(line + l + 1); | |
49aa47c7 LP |
5462 | if (!value) |
5463 | return -ENOMEM; | |
ab94af92 LP |
5464 | |
5465 | r = 1; | |
5466 | break; | |
5467 | } | |
5468 | ||
5469 | } while (!done); | |
5470 | ||
49aa47c7 | 5471 | *_value = value; |
ab94af92 LP |
5472 | return r; |
5473 | } | |
d889a206 | 5474 | |
3d7415f4 LP |
5475 | bool http_etag_is_valid(const char *etag) { |
5476 | if (isempty(etag)) | |
5477 | return false; | |
5478 | ||
5479 | if (!endswith(etag, "\"")) | |
5480 | return false; | |
5481 | ||
5482 | if (!startswith(etag, "\"") && !startswith(etag, "W/\"")) | |
5483 | return false; | |
5484 | ||
5485 | return true; | |
5486 | } | |
5487 | ||
a2e03378 LP |
5488 | bool http_url_is_valid(const char *url) { |
5489 | const char *p; | |
49dbfa7b | 5490 | |
a2e03378 LP |
5491 | if (isempty(url)) |
5492 | return false; | |
49dbfa7b | 5493 | |
a2e03378 LP |
5494 | p = startswith(url, "http://"); |
5495 | if (!p) | |
5496 | p = startswith(url, "https://"); | |
5497 | if (!p) | |
5498 | return false; | |
49dbfa7b | 5499 | |
a2e03378 LP |
5500 | if (isempty(p)) |
5501 | return false; | |
49dbfa7b | 5502 | |
a2e03378 LP |
5503 | return ascii_is_valid(p); |
5504 | } | |
49dbfa7b | 5505 | |
a2e03378 LP |
5506 | bool documentation_url_is_valid(const char *url) { |
5507 | const char *p; | |
5508 | ||
5509 | if (isempty(url)) | |
5510 | return false; | |
5511 | ||
5512 | if (http_url_is_valid(url)) | |
49dbfa7b LP |
5513 | return true; |
5514 | ||
a2e03378 LP |
5515 | p = startswith(url, "file:/"); |
5516 | if (!p) | |
5517 | p = startswith(url, "info:"); | |
5518 | if (!p) | |
5519 | p = startswith(url, "man:"); | |
5520 | ||
5521 | if (isempty(p)) | |
5522 | return false; | |
5523 | ||
5524 | return ascii_is_valid(p); | |
49dbfa7b | 5525 | } |
9be346c9 HH |
5526 | |
5527 | bool in_initrd(void) { | |
73020ab2 | 5528 | static int saved = -1; |
825c6fe5 | 5529 | struct statfs s; |
8f33b5b8 | 5530 | |
825c6fe5 LP |
5531 | if (saved >= 0) |
5532 | return saved; | |
5533 | ||
5534 | /* We make two checks here: | |
5535 | * | |
5536 | * 1. the flag file /etc/initrd-release must exist | |
5537 | * 2. the root file system must be a memory file system | |
5538 | * | |
5539 | * The second check is extra paranoia, since misdetecting an | |
5540 | * initrd can have bad bad consequences due the initrd | |
5541 | * emptying when transititioning to the main systemd. | |
5542 | */ | |
5543 | ||
5544 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
5545 | statfs("/", &s) >= 0 && | |
943aad8c | 5546 | is_temporary_fs(&s); |
9be346c9 | 5547 | |
8f33b5b8 | 5548 | return saved; |
9be346c9 | 5549 | } |
069cfc85 LP |
5550 | |
5551 | void warn_melody(void) { | |
e67f47e5 | 5552 | _cleanup_close_ int fd = -1; |
069cfc85 LP |
5553 | |
5554 | fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
5555 | if (fd < 0) | |
5556 | return; | |
5557 | ||
040f18ea | 5558 | /* Yeah, this is synchronous. Kinda sucks. But well... */ |
069cfc85 LP |
5559 | |
5560 | ioctl(fd, KIOCSOUND, (int)(1193180/440)); | |
5561 | usleep(125*USEC_PER_MSEC); | |
5562 | ||
5563 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5564 | usleep(125*USEC_PER_MSEC); | |
5565 | ||
5566 | ioctl(fd, KIOCSOUND, (int)(1193180/220)); | |
5567 | usleep(125*USEC_PER_MSEC); | |
5568 | ||
5569 | ioctl(fd, KIOCSOUND, 0); | |
069cfc85 | 5570 | } |
cd3bd60a LP |
5571 | |
5572 | int make_console_stdio(void) { | |
5573 | int fd, r; | |
5574 | ||
5575 | /* Make /dev/console the controlling terminal and stdin/stdout/stderr */ | |
5576 | ||
3a43da28 | 5577 | fd = acquire_terminal("/dev/console", false, true, true, USEC_INFINITY); |
f647962d MS |
5578 | if (fd < 0) |
5579 | return log_error_errno(fd, "Failed to acquire terminal: %m"); | |
cd3bd60a LP |
5580 | |
5581 | r = make_stdio(fd); | |
f647962d MS |
5582 | if (r < 0) |
5583 | return log_error_errno(r, "Failed to duplicate terminal fd: %m"); | |
cd3bd60a LP |
5584 | |
5585 | return 0; | |
5586 | } | |
7c5f152a LP |
5587 | |
5588 | int get_home_dir(char **_h) { | |
2cfbd749 | 5589 | struct passwd *p; |
7c5f152a | 5590 | const char *e; |
2cfbd749 | 5591 | char *h; |
7c5f152a | 5592 | uid_t u; |
7c5f152a LP |
5593 | |
5594 | assert(_h); | |
5595 | ||
5596 | /* Take the user specified one */ | |
9a00f57a LP |
5597 | e = secure_getenv("HOME"); |
5598 | if (e && path_is_absolute(e)) { | |
7c5f152a LP |
5599 | h = strdup(e); |
5600 | if (!h) | |
5601 | return -ENOMEM; | |
5602 | ||
5603 | *_h = h; | |
5604 | return 0; | |
5605 | } | |
5606 | ||
5607 | /* Hardcode home directory for root to avoid NSS */ | |
5608 | u = getuid(); | |
5609 | if (u == 0) { | |
5610 | h = strdup("/root"); | |
5611 | if (!h) | |
5612 | return -ENOMEM; | |
5613 | ||
5614 | *_h = h; | |
5615 | return 0; | |
5616 | } | |
5617 | ||
5618 | /* Check the database... */ | |
5619 | errno = 0; | |
5620 | p = getpwuid(u); | |
5621 | if (!p) | |
bcb161b0 | 5622 | return errno > 0 ? -errno : -ESRCH; |
7c5f152a LP |
5623 | |
5624 | if (!path_is_absolute(p->pw_dir)) | |
5625 | return -EINVAL; | |
5626 | ||
5627 | h = strdup(p->pw_dir); | |
5628 | if (!h) | |
5629 | return -ENOMEM; | |
5630 | ||
5631 | *_h = h; | |
5632 | return 0; | |
5633 | } | |
5634 | ||
2cfbd749 LP |
5635 | int get_shell(char **_s) { |
5636 | struct passwd *p; | |
5637 | const char *e; | |
5638 | char *s; | |
5639 | uid_t u; | |
5640 | ||
5641 | assert(_s); | |
5642 | ||
5643 | /* Take the user specified one */ | |
5644 | e = getenv("SHELL"); | |
5645 | if (e) { | |
5646 | s = strdup(e); | |
5647 | if (!s) | |
5648 | return -ENOMEM; | |
5649 | ||
5650 | *_s = s; | |
5651 | return 0; | |
5652 | } | |
5653 | ||
5654 | /* Hardcode home directory for root to avoid NSS */ | |
5655 | u = getuid(); | |
5656 | if (u == 0) { | |
5657 | s = strdup("/bin/sh"); | |
5658 | if (!s) | |
5659 | return -ENOMEM; | |
5660 | ||
5661 | *_s = s; | |
5662 | return 0; | |
5663 | } | |
5664 | ||
5665 | /* Check the database... */ | |
5666 | errno = 0; | |
5667 | p = getpwuid(u); | |
5668 | if (!p) | |
5669 | return errno > 0 ? -errno : -ESRCH; | |
5670 | ||
5671 | if (!path_is_absolute(p->pw_shell)) | |
5672 | return -EINVAL; | |
5673 | ||
5674 | s = strdup(p->pw_shell); | |
5675 | if (!s) | |
5676 | return -ENOMEM; | |
5677 | ||
5678 | *_s = s; | |
5679 | return 0; | |
5680 | } | |
5681 | ||
ae6c3cc0 | 5682 | bool filename_is_valid(const char *p) { |
0b507b17 LP |
5683 | |
5684 | if (isempty(p)) | |
5685 | return false; | |
5686 | ||
5687 | if (strchr(p, '/')) | |
5688 | return false; | |
5689 | ||
5690 | if (streq(p, ".")) | |
5691 | return false; | |
5692 | ||
5693 | if (streq(p, "..")) | |
5694 | return false; | |
5695 | ||
5696 | if (strlen(p) > FILENAME_MAX) | |
5697 | return false; | |
5698 | ||
5699 | return true; | |
5700 | } | |
5701 | ||
5702 | bool string_is_safe(const char *p) { | |
5703 | const char *t; | |
5704 | ||
6294aa76 LP |
5705 | if (!p) |
5706 | return false; | |
0b507b17 LP |
5707 | |
5708 | for (t = p; *t; t++) { | |
01539d6e | 5709 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
5710 | return false; |
5711 | ||
6294aa76 | 5712 | if (strchr("\\\"\'\0x7f", *t)) |
0b507b17 LP |
5713 | return false; |
5714 | } | |
5715 | ||
5716 | return true; | |
5717 | } | |
cfbc22ab | 5718 | |
ac4c8d6d | 5719 | /** |
6294aa76 LP |
5720 | * Check if a string contains control characters. If 'ok' is non-NULL |
5721 | * it may be a string containing additional CCs to be considered OK. | |
ac4c8d6d | 5722 | */ |
6294aa76 | 5723 | bool string_has_cc(const char *p, const char *ok) { |
4d1a6904 LP |
5724 | const char *t; |
5725 | ||
5726 | assert(p); | |
5727 | ||
3a8a9163 | 5728 | for (t = p; *t; t++) { |
6294aa76 | 5729 | if (ok && strchr(ok, *t)) |
1cb1767a | 5730 | continue; |
6294aa76 LP |
5731 | |
5732 | if (*t > 0 && *t < ' ') | |
4d1a6904 LP |
5733 | return true; |
5734 | ||
3a8a9163 LP |
5735 | if (*t == 127) |
5736 | return true; | |
5737 | } | |
5738 | ||
4d1a6904 LP |
5739 | return false; |
5740 | } | |
5741 | ||
e884315e LP |
5742 | bool path_is_safe(const char *p) { |
5743 | ||
5744 | if (isempty(p)) | |
5745 | return false; | |
5746 | ||
5747 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
5748 | return false; | |
5749 | ||
5750 | if (strlen(p) > PATH_MAX) | |
5751 | return false; | |
5752 | ||
5753 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
5754 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
5755 | return false; | |
5756 | ||
5757 | if (strstr(p, "//")) | |
5758 | return false; | |
5759 | ||
5760 | return true; | |
5761 | } | |
5762 | ||
a9e12476 KS |
5763 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
5764 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 5765 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
5766 | size_t l, u, idx; |
5767 | const void *p; | |
5768 | int comparison; | |
5769 | ||
5770 | l = 0; | |
5771 | u = nmemb; | |
5772 | while (l < u) { | |
5773 | idx = (l + u) / 2; | |
5774 | p = (void *)(((const char *) base) + (idx * size)); | |
5775 | comparison = compar(key, p, arg); | |
5776 | if (comparison < 0) | |
5777 | u = idx; | |
5778 | else if (comparison > 0) | |
5779 | l = idx + 1; | |
5780 | else | |
5781 | return (void *)p; | |
5782 | } | |
5783 | return NULL; | |
5784 | } | |
09017585 | 5785 | |
20f56fdd DR |
5786 | void init_gettext(void) { |
5787 | setlocale(LC_ALL, ""); | |
5788 | textdomain(GETTEXT_PACKAGE); | |
5789 | } | |
5790 | ||
09017585 MS |
5791 | bool is_locale_utf8(void) { |
5792 | const char *set; | |
5793 | static int cached_answer = -1; | |
5794 | ||
5795 | if (cached_answer >= 0) | |
5796 | goto out; | |
5797 | ||
5798 | if (!setlocale(LC_ALL, "")) { | |
5799 | cached_answer = true; | |
5800 | goto out; | |
5801 | } | |
5802 | ||
5803 | set = nl_langinfo(CODESET); | |
5804 | if (!set) { | |
5805 | cached_answer = true; | |
5806 | goto out; | |
5807 | } | |
5808 | ||
f168c273 | 5809 | if (streq(set, "UTF-8")) { |
fee79e01 HH |
5810 | cached_answer = true; |
5811 | goto out; | |
5812 | } | |
5813 | ||
6cf2f1d9 HH |
5814 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
5815 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
5816 | set = setlocale(LC_CTYPE, NULL); |
5817 | if (!set) { | |
5818 | cached_answer = true; | |
5819 | goto out; | |
5820 | } | |
5821 | ||
6cf2f1d9 HH |
5822 | /* Check result, but ignore the result if C was set |
5823 | * explicitly. */ | |
5824 | cached_answer = | |
5825 | streq(set, "C") && | |
5826 | !getenv("LC_ALL") && | |
5827 | !getenv("LC_CTYPE") && | |
5828 | !getenv("LANG"); | |
fee79e01 | 5829 | |
09017585 | 5830 | out: |
6cf2f1d9 | 5831 | return (bool) cached_answer; |
09017585 | 5832 | } |
c339d977 MS |
5833 | |
5834 | const char *draw_special_char(DrawSpecialChar ch) { | |
5835 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
6b01f1d3 | 5836 | |
c339d977 | 5837 | /* UTF-8 */ { |
6b01f1d3 | 5838 | [DRAW_TREE_VERTICAL] = "\342\224\202 ", /* │ */ |
45a5ff0d MS |
5839 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ |
5840 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 5841 | [DRAW_TREE_SPACE] = " ", /* */ |
6b01f1d3 LP |
5842 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243", /* ‣ */ |
5843 | [DRAW_BLACK_CIRCLE] = "\342\227\217", /* ● */ | |
5844 | [DRAW_ARROW] = "\342\206\222", /* → */ | |
13f8b8cb | 5845 | [DRAW_DASH] = "\342\200\223", /* – */ |
c339d977 | 5846 | }, |
6b01f1d3 | 5847 | |
c339d977 | 5848 | /* ASCII fallback */ { |
6b01f1d3 | 5849 | [DRAW_TREE_VERTICAL] = "| ", |
45a5ff0d MS |
5850 | [DRAW_TREE_BRANCH] = "|-", |
5851 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 5852 | [DRAW_TREE_SPACE] = " ", |
6b01f1d3 LP |
5853 | [DRAW_TRIANGULAR_BULLET] = ">", |
5854 | [DRAW_BLACK_CIRCLE] = "*", | |
5855 | [DRAW_ARROW] = "->", | |
13f8b8cb | 5856 | [DRAW_DASH] = "-", |
c339d977 MS |
5857 | } |
5858 | }; | |
5859 | ||
5860 | return draw_table[!is_locale_utf8()][ch]; | |
5861 | } | |
409bc9c3 LP |
5862 | |
5863 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
5864 | const char *f; | |
5865 | char *t, *r; | |
5866 | size_t l, old_len, new_len; | |
5867 | ||
5868 | assert(text); | |
5869 | assert(old_string); | |
5870 | assert(new_string); | |
5871 | ||
5872 | old_len = strlen(old_string); | |
5873 | new_len = strlen(new_string); | |
5874 | ||
5875 | l = strlen(text); | |
5876 | r = new(char, l+1); | |
5877 | if (!r) | |
5878 | return NULL; | |
5879 | ||
5880 | f = text; | |
5881 | t = r; | |
5882 | while (*f) { | |
5883 | char *a; | |
5884 | size_t d, nl; | |
5885 | ||
5886 | if (!startswith(f, old_string)) { | |
5887 | *(t++) = *(f++); | |
5888 | continue; | |
5889 | } | |
5890 | ||
5891 | d = t - r; | |
5892 | nl = l - old_len + new_len; | |
5893 | a = realloc(r, nl + 1); | |
5894 | if (!a) | |
5895 | goto oom; | |
5896 | ||
5897 | l = nl; | |
5898 | r = a; | |
5899 | t = r + d; | |
5900 | ||
5901 | t = stpcpy(t, new_string); | |
5902 | f += old_len; | |
5903 | } | |
5904 | ||
5905 | *t = 0; | |
5906 | return r; | |
5907 | ||
5908 | oom: | |
5909 | free(r); | |
5910 | return NULL; | |
5911 | } | |
e8bc0ea2 LP |
5912 | |
5913 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 5914 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
5915 | enum { |
5916 | STATE_OTHER, | |
5917 | STATE_ESCAPE, | |
5918 | STATE_BRACKET | |
5919 | } state = STATE_OTHER; | |
5920 | char *obuf = NULL; | |
5921 | size_t osz = 0, isz; | |
5922 | FILE *f; | |
5923 | ||
5924 | assert(ibuf); | |
5925 | assert(*ibuf); | |
5926 | ||
5927 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
5928 | ||
5929 | isz = _isz ? *_isz : strlen(*ibuf); | |
5930 | ||
5931 | f = open_memstream(&obuf, &osz); | |
5932 | if (!f) | |
5933 | return NULL; | |
5934 | ||
5935 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
5936 | ||
5937 | switch (state) { | |
5938 | ||
5939 | case STATE_OTHER: | |
5940 | if (i >= *ibuf + isz) /* EOT */ | |
5941 | break; | |
5942 | else if (*i == '\x1B') | |
5943 | state = STATE_ESCAPE; | |
5944 | else if (*i == '\t') | |
5945 | fputs(" ", f); | |
5946 | else | |
5947 | fputc(*i, f); | |
5948 | break; | |
5949 | ||
5950 | case STATE_ESCAPE: | |
5951 | if (i >= *ibuf + isz) { /* EOT */ | |
5952 | fputc('\x1B', f); | |
5953 | break; | |
5954 | } else if (*i == '[') { | |
5955 | state = STATE_BRACKET; | |
5956 | begin = i + 1; | |
5957 | } else { | |
5958 | fputc('\x1B', f); | |
5959 | fputc(*i, f); | |
5960 | state = STATE_OTHER; | |
5961 | } | |
5962 | ||
5963 | break; | |
5964 | ||
5965 | case STATE_BRACKET: | |
5966 | ||
5967 | if (i >= *ibuf + isz || /* EOT */ | |
5968 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
5969 | fputc('\x1B', f); | |
5970 | fputc('[', f); | |
5971 | state = STATE_OTHER; | |
5972 | i = begin-1; | |
5973 | } else if (*i == 'm') | |
5974 | state = STATE_OTHER; | |
5975 | break; | |
5976 | } | |
5977 | } | |
5978 | ||
5979 | if (ferror(f)) { | |
5980 | fclose(f); | |
5981 | free(obuf); | |
5982 | return NULL; | |
5983 | } | |
5984 | ||
5985 | fclose(f); | |
5986 | ||
5987 | free(*ibuf); | |
5988 | *ibuf = obuf; | |
5989 | ||
5990 | if (_isz) | |
5991 | *_isz = osz; | |
5992 | ||
5993 | return obuf; | |
5994 | } | |
240dbaa4 LP |
5995 | |
5996 | int on_ac_power(void) { | |
5997 | bool found_offline = false, found_online = false; | |
5998 | _cleanup_closedir_ DIR *d = NULL; | |
5999 | ||
6000 | d = opendir("/sys/class/power_supply"); | |
6001 | if (!d) | |
6d890034 | 6002 | return errno == ENOENT ? true : -errno; |
240dbaa4 LP |
6003 | |
6004 | for (;;) { | |
6005 | struct dirent *de; | |
240dbaa4 LP |
6006 | _cleanup_close_ int fd = -1, device = -1; |
6007 | char contents[6]; | |
6008 | ssize_t n; | |
240dbaa4 | 6009 | |
3fd11280 FW |
6010 | errno = 0; |
6011 | de = readdir(d); | |
6012 | if (!de && errno != 0) | |
6013 | return -errno; | |
240dbaa4 LP |
6014 | |
6015 | if (!de) | |
6016 | break; | |
6017 | ||
a34bf9db | 6018 | if (hidden_file(de->d_name)) |
240dbaa4 LP |
6019 | continue; |
6020 | ||
6021 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
6022 | if (device < 0) { | |
6023 | if (errno == ENOENT || errno == ENOTDIR) | |
6024 | continue; | |
6025 | ||
6026 | return -errno; | |
6027 | } | |
6028 | ||
6029 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
6030 | if (fd < 0) { | |
6031 | if (errno == ENOENT) | |
6032 | continue; | |
6033 | ||
6034 | return -errno; | |
6035 | } | |
6036 | ||
6037 | n = read(fd, contents, sizeof(contents)); | |
6038 | if (n < 0) | |
6039 | return -errno; | |
6040 | ||
6041 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
6042 | continue; | |
6043 | ||
03e334a1 | 6044 | safe_close(fd); |
240dbaa4 LP |
6045 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
6046 | if (fd < 0) { | |
6047 | if (errno == ENOENT) | |
6048 | continue; | |
6049 | ||
6050 | return -errno; | |
6051 | } | |
6052 | ||
6053 | n = read(fd, contents, sizeof(contents)); | |
6054 | if (n < 0) | |
6055 | return -errno; | |
6056 | ||
6057 | if (n != 2 || contents[1] != '\n') | |
6058 | return -EIO; | |
6059 | ||
6060 | if (contents[0] == '1') { | |
6061 | found_online = true; | |
6062 | break; | |
6063 | } else if (contents[0] == '0') | |
6064 | found_offline = true; | |
6065 | else | |
6066 | return -EIO; | |
6067 | } | |
6068 | ||
6069 | return found_online || !found_offline; | |
6070 | } | |
fabe5c0e | 6071 | |
4cf7ea55 | 6072 | static int search_and_fopen_internal(const char *path, const char *mode, const char *root, char **search, FILE **_f) { |
fabe5c0e LP |
6073 | char **i; |
6074 | ||
6075 | assert(path); | |
6076 | assert(mode); | |
6077 | assert(_f); | |
6078 | ||
7d8da2c9 | 6079 | if (!path_strv_resolve_uniq(search, root)) |
fabe5c0e LP |
6080 | return -ENOMEM; |
6081 | ||
6082 | STRV_FOREACH(i, search) { | |
6083 | _cleanup_free_ char *p = NULL; | |
6084 | FILE *f; | |
6085 | ||
375eadd9 MM |
6086 | if (root) |
6087 | p = strjoin(root, *i, "/", path, NULL); | |
6088 | else | |
6089 | p = strjoin(*i, "/", path, NULL); | |
fabe5c0e LP |
6090 | if (!p) |
6091 | return -ENOMEM; | |
6092 | ||
6093 | f = fopen(p, mode); | |
6094 | if (f) { | |
6095 | *_f = f; | |
6096 | return 0; | |
6097 | } | |
6098 | ||
6099 | if (errno != ENOENT) | |
6100 | return -errno; | |
6101 | } | |
6102 | ||
6103 | return -ENOENT; | |
6104 | } | |
6105 | ||
4cf7ea55 | 6106 | int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f) { |
fabe5c0e LP |
6107 | _cleanup_strv_free_ char **copy = NULL; |
6108 | ||
6109 | assert(path); | |
6110 | assert(mode); | |
6111 | assert(_f); | |
6112 | ||
6113 | if (path_is_absolute(path)) { | |
6114 | FILE *f; | |
6115 | ||
6116 | f = fopen(path, mode); | |
6117 | if (f) { | |
6118 | *_f = f; | |
6119 | return 0; | |
6120 | } | |
6121 | ||
6122 | return -errno; | |
6123 | } | |
6124 | ||
6125 | copy = strv_copy((char**) search); | |
6126 | if (!copy) | |
6127 | return -ENOMEM; | |
6128 | ||
4cf7ea55 | 6129 | return search_and_fopen_internal(path, mode, root, copy, _f); |
fabe5c0e LP |
6130 | } |
6131 | ||
4cf7ea55 | 6132 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f) { |
fabe5c0e LP |
6133 | _cleanup_strv_free_ char **s = NULL; |
6134 | ||
6135 | if (path_is_absolute(path)) { | |
6136 | FILE *f; | |
6137 | ||
6138 | f = fopen(path, mode); | |
6139 | if (f) { | |
6140 | *_f = f; | |
6141 | return 0; | |
6142 | } | |
6143 | ||
6144 | return -errno; | |
6145 | } | |
6146 | ||
6147 | s = strv_split_nulstr(search); | |
6148 | if (!s) | |
6149 | return -ENOMEM; | |
6150 | ||
4cf7ea55 | 6151 | return search_and_fopen_internal(path, mode, root, s, _f); |
fabe5c0e | 6152 | } |
c17ec25e | 6153 | |
66e35261 LP |
6154 | char *strextend(char **x, ...) { |
6155 | va_list ap; | |
6156 | size_t f, l; | |
6157 | char *r, *p; | |
6158 | ||
6159 | assert(x); | |
6160 | ||
6161 | l = f = *x ? strlen(*x) : 0; | |
6162 | ||
6163 | va_start(ap, x); | |
6164 | for (;;) { | |
6165 | const char *t; | |
6166 | size_t n; | |
6167 | ||
6168 | t = va_arg(ap, const char *); | |
6169 | if (!t) | |
6170 | break; | |
6171 | ||
6172 | n = strlen(t); | |
6173 | if (n > ((size_t) -1) - l) { | |
6174 | va_end(ap); | |
6175 | return NULL; | |
6176 | } | |
6177 | ||
6178 | l += n; | |
6179 | } | |
6180 | va_end(ap); | |
6181 | ||
6182 | r = realloc(*x, l+1); | |
6183 | if (!r) | |
6184 | return NULL; | |
6185 | ||
6186 | p = r + f; | |
6187 | ||
6188 | va_start(ap, x); | |
6189 | for (;;) { | |
6190 | const char *t; | |
6191 | ||
6192 | t = va_arg(ap, const char *); | |
6193 | if (!t) | |
6194 | break; | |
6195 | ||
6196 | p = stpcpy(p, t); | |
6197 | } | |
6198 | va_end(ap); | |
6199 | ||
6200 | *p = 0; | |
6201 | *x = r; | |
6202 | ||
6203 | return r + l; | |
6204 | } | |
9a17484d LP |
6205 | |
6206 | char *strrep(const char *s, unsigned n) { | |
6207 | size_t l; | |
6208 | char *r, *p; | |
6209 | unsigned i; | |
6210 | ||
6211 | assert(s); | |
6212 | ||
6213 | l = strlen(s); | |
6214 | p = r = malloc(l * n + 1); | |
6215 | if (!r) | |
6216 | return NULL; | |
6217 | ||
6218 | for (i = 0; i < n; i++) | |
6219 | p = stpcpy(p, s); | |
6220 | ||
6221 | *p = 0; | |
6222 | return r; | |
6223 | } | |
392d5b37 | 6224 | |
ca2d3784 ZJS |
6225 | void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) { |
6226 | size_t a, newalloc; | |
392d5b37 LP |
6227 | void *q; |
6228 | ||
98088803 | 6229 | assert(p); |
e93c33d4 SL |
6230 | assert(allocated); |
6231 | ||
392d5b37 LP |
6232 | if (*allocated >= need) |
6233 | return *p; | |
6234 | ||
ca2d3784 ZJS |
6235 | newalloc = MAX(need * 2, 64u / size); |
6236 | a = newalloc * size; | |
98088803 LP |
6237 | |
6238 | /* check for overflows */ | |
ca2d3784 | 6239 | if (a < size * need) |
98088803 LP |
6240 | return NULL; |
6241 | ||
392d5b37 LP |
6242 | q = realloc(*p, a); |
6243 | if (!q) | |
6244 | return NULL; | |
6245 | ||
6246 | *p = q; | |
ca2d3784 | 6247 | *allocated = newalloc; |
392d5b37 LP |
6248 | return q; |
6249 | } | |
aa96c6cb | 6250 | |
ca2d3784 | 6251 | void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) { |
98088803 | 6252 | size_t prev; |
4545a231 DH |
6253 | uint8_t *q; |
6254 | ||
98088803 LP |
6255 | assert(p); |
6256 | assert(allocated); | |
6257 | ||
6258 | prev = *allocated; | |
6259 | ||
ca2d3784 | 6260 | q = greedy_realloc(p, allocated, need, size); |
4545a231 DH |
6261 | if (!q) |
6262 | return NULL; | |
6263 | ||
6264 | if (*allocated > prev) | |
ca2d3784 | 6265 | memzero(q + prev * size, (*allocated - prev) * size); |
4545a231 DH |
6266 | |
6267 | return q; | |
6268 | } | |
6269 | ||
aa96c6cb LP |
6270 | bool id128_is_valid(const char *s) { |
6271 | size_t i, l; | |
6272 | ||
6273 | l = strlen(s); | |
6274 | if (l == 32) { | |
6275 | ||
6276 | /* Simple formatted 128bit hex string */ | |
6277 | ||
6278 | for (i = 0; i < l; i++) { | |
6279 | char c = s[i]; | |
6280 | ||
6281 | if (!(c >= '0' && c <= '9') && | |
6282 | !(c >= 'a' && c <= 'z') && | |
6283 | !(c >= 'A' && c <= 'Z')) | |
6284 | return false; | |
6285 | } | |
6286 | ||
6287 | } else if (l == 36) { | |
6288 | ||
6289 | /* Formatted UUID */ | |
6290 | ||
6291 | for (i = 0; i < l; i++) { | |
6292 | char c = s[i]; | |
6293 | ||
6294 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
6295 | if (c != '-') | |
6296 | return false; | |
6297 | } else { | |
6298 | if (!(c >= '0' && c <= '9') && | |
6299 | !(c >= 'a' && c <= 'z') && | |
6300 | !(c >= 'A' && c <= 'Z')) | |
6301 | return false; | |
6302 | } | |
6303 | } | |
6304 | ||
6305 | } else | |
6306 | return false; | |
6307 | ||
6308 | return true; | |
6309 | } | |
7085053a | 6310 | |
d4ac85c6 LP |
6311 | int split_pair(const char *s, const char *sep, char **l, char **r) { |
6312 | char *x, *a, *b; | |
6313 | ||
6314 | assert(s); | |
6315 | assert(sep); | |
6316 | assert(l); | |
6317 | assert(r); | |
6318 | ||
6319 | if (isempty(sep)) | |
6320 | return -EINVAL; | |
6321 | ||
6322 | x = strstr(s, sep); | |
6323 | if (!x) | |
6324 | return -EINVAL; | |
6325 | ||
6326 | a = strndup(s, x - s); | |
6327 | if (!a) | |
6328 | return -ENOMEM; | |
6329 | ||
6330 | b = strdup(x + strlen(sep)); | |
6331 | if (!b) { | |
6332 | free(a); | |
6333 | return -ENOMEM; | |
6334 | } | |
6335 | ||
6336 | *l = a; | |
6337 | *r = b; | |
6338 | ||
6339 | return 0; | |
6340 | } | |
295edddf | 6341 | |
74df0fca | 6342 | int shall_restore_state(void) { |
1a299299 | 6343 | _cleanup_free_ char *value = NULL; |
74df0fca | 6344 | int r; |
295edddf | 6345 | |
1a299299 | 6346 | r = get_proc_cmdline_key("systemd.restore_state=", &value); |
74df0fca LP |
6347 | if (r < 0) |
6348 | return r; | |
1a299299 LP |
6349 | if (r == 0) |
6350 | return true; | |
295edddf | 6351 | |
1a299299 | 6352 | return parse_boolean(value) != 0; |
74df0fca LP |
6353 | } |
6354 | ||
6355 | int proc_cmdline(char **ret) { | |
b5884878 | 6356 | assert(ret); |
295edddf | 6357 | |
b5884878 LP |
6358 | if (detect_container(NULL) > 0) |
6359 | return get_process_cmdline(1, 0, false, ret); | |
6360 | else | |
6361 | return read_one_line_file("/proc/cmdline", ret); | |
295edddf | 6362 | } |
bc9fd78c | 6363 | |
059cb385 | 6364 | int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) { |
141a79f4 | 6365 | _cleanup_free_ char *line = NULL; |
f32d2db1 | 6366 | const char *p; |
141a79f4 ZJS |
6367 | int r; |
6368 | ||
059cb385 LP |
6369 | assert(parse_item); |
6370 | ||
141a79f4 ZJS |
6371 | r = proc_cmdline(&line); |
6372 | if (r < 0) | |
b5884878 | 6373 | return r; |
141a79f4 | 6374 | |
f32d2db1 LP |
6375 | p = line; |
6376 | for (;;) { | |
6377 | _cleanup_free_ char *word = NULL; | |
6378 | char *value = NULL; | |
141a79f4 | 6379 | |
f32d2db1 LP |
6380 | r = unquote_first_word(&p, &word, true); |
6381 | if (r < 0) | |
6382 | return r; | |
6383 | if (r == 0) | |
6384 | break; | |
141a79f4 | 6385 | |
059cb385 LP |
6386 | /* Filter out arguments that are intended only for the |
6387 | * initrd */ | |
6388 | if (!in_initrd() && startswith(word, "rd.")) | |
6389 | continue; | |
6390 | ||
6391 | value = strchr(word, '='); | |
6392 | if (value) | |
6393 | *(value++) = 0; | |
6394 | ||
6395 | r = parse_item(word, value); | |
6396 | if (r < 0) | |
141a79f4 | 6397 | return r; |
141a79f4 ZJS |
6398 | } |
6399 | ||
6400 | return 0; | |
6401 | } | |
6402 | ||
1a299299 LP |
6403 | int get_proc_cmdline_key(const char *key, char **value) { |
6404 | _cleanup_free_ char *line = NULL, *ret = NULL; | |
6405 | bool found = false; | |
6406 | const char *p; | |
6407 | int r; | |
6408 | ||
6409 | assert(key); | |
6410 | ||
6411 | r = proc_cmdline(&line); | |
6412 | if (r < 0) | |
6413 | return r; | |
6414 | ||
6415 | p = line; | |
6416 | for (;;) { | |
6417 | _cleanup_free_ char *word = NULL; | |
6418 | const char *e; | |
6419 | ||
6420 | r = unquote_first_word(&p, &word, true); | |
6421 | if (r < 0) | |
6422 | return r; | |
6423 | if (r == 0) | |
6424 | break; | |
6425 | ||
6426 | /* Filter out arguments that are intended only for the | |
6427 | * initrd */ | |
6428 | if (!in_initrd() && startswith(word, "rd.")) | |
6429 | continue; | |
6430 | ||
6431 | if (value) { | |
6432 | e = startswith(word, key); | |
6433 | if (!e) | |
6434 | continue; | |
6435 | ||
6436 | r = free_and_strdup(&ret, e); | |
6437 | if (r < 0) | |
6438 | return r; | |
6439 | ||
6440 | found = true; | |
6441 | } else { | |
6442 | if (streq(word, key)) | |
6443 | found = true; | |
6444 | } | |
6445 | } | |
6446 | ||
6447 | if (value) { | |
6448 | *value = ret; | |
6449 | ret = NULL; | |
6450 | } | |
6451 | ||
6452 | return found; | |
6453 | ||
6454 | } | |
6455 | ||
bc9fd78c LP |
6456 | int container_get_leader(const char *machine, pid_t *pid) { |
6457 | _cleanup_free_ char *s = NULL, *class = NULL; | |
6458 | const char *p; | |
6459 | pid_t leader; | |
6460 | int r; | |
6461 | ||
6462 | assert(machine); | |
6463 | assert(pid); | |
6464 | ||
63c372cb | 6465 | p = strjoina("/run/systemd/machines/", machine); |
bc9fd78c LP |
6466 | r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); |
6467 | if (r == -ENOENT) | |
6468 | return -EHOSTDOWN; | |
6469 | if (r < 0) | |
6470 | return r; | |
6471 | if (!s) | |
6472 | return -EIO; | |
6473 | ||
6474 | if (!streq_ptr(class, "container")) | |
6475 | return -EIO; | |
6476 | ||
6477 | r = parse_pid(s, &leader); | |
6478 | if (r < 0) | |
6479 | return r; | |
6480 | if (leader <= 1) | |
6481 | return -EIO; | |
6482 | ||
6483 | *pid = leader; | |
6484 | return 0; | |
6485 | } | |
6486 | ||
878cd7e9 LP |
6487 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd) { |
6488 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1; | |
359a06aa | 6489 | int rfd = -1; |
bc9fd78c LP |
6490 | |
6491 | assert(pid >= 0); | |
bc9fd78c | 6492 | |
878cd7e9 LP |
6493 | if (mntns_fd) { |
6494 | const char *mntns; | |
a4475f57 | 6495 | |
878cd7e9 LP |
6496 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
6497 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6498 | if (mntnsfd < 0) | |
6499 | return -errno; | |
6500 | } | |
bc9fd78c | 6501 | |
878cd7e9 LP |
6502 | if (pidns_fd) { |
6503 | const char *pidns; | |
6504 | ||
6505 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
6506 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6507 | if (pidnsfd < 0) | |
6508 | return -errno; | |
6509 | } | |
6510 | ||
6511 | if (netns_fd) { | |
6512 | const char *netns; | |
6513 | ||
6514 | netns = procfs_file_alloca(pid, "ns/net"); | |
6515 | netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
6516 | if (netnsfd < 0) | |
6517 | return -errno; | |
6518 | } | |
6519 | ||
6520 | if (root_fd) { | |
6521 | const char *root; | |
6522 | ||
6523 | root = procfs_file_alloca(pid, "root"); | |
6524 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
6525 | if (rfd < 0) | |
6526 | return -errno; | |
6527 | } | |
6528 | ||
6529 | if (pidns_fd) | |
6530 | *pidns_fd = pidnsfd; | |
bc9fd78c | 6531 | |
878cd7e9 LP |
6532 | if (mntns_fd) |
6533 | *mntns_fd = mntnsfd; | |
6534 | ||
6535 | if (netns_fd) | |
6536 | *netns_fd = netnsfd; | |
6537 | ||
6538 | if (root_fd) | |
6539 | *root_fd = rfd; | |
6540 | ||
6541 | pidnsfd = mntnsfd = netnsfd = -1; | |
bc9fd78c LP |
6542 | |
6543 | return 0; | |
6544 | } | |
6545 | ||
878cd7e9 | 6546 | int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd) { |
bc9fd78c | 6547 | |
878cd7e9 LP |
6548 | if (pidns_fd >= 0) |
6549 | if (setns(pidns_fd, CLONE_NEWPID) < 0) | |
6550 | return -errno; | |
a4475f57 | 6551 | |
878cd7e9 LP |
6552 | if (mntns_fd >= 0) |
6553 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
6554 | return -errno; | |
bc9fd78c | 6555 | |
878cd7e9 LP |
6556 | if (netns_fd >= 0) |
6557 | if (setns(netns_fd, CLONE_NEWNET) < 0) | |
6558 | return -errno; | |
bc9fd78c | 6559 | |
878cd7e9 LP |
6560 | if (root_fd >= 0) { |
6561 | if (fchdir(root_fd) < 0) | |
6562 | return -errno; | |
6563 | ||
6564 | if (chroot(".") < 0) | |
6565 | return -errno; | |
6566 | } | |
bc9fd78c | 6567 | |
5e2b3214 LP |
6568 | if (setresgid(0, 0, 0) < 0) |
6569 | return -errno; | |
6570 | ||
878cd7e9 LP |
6571 | if (setgroups(0, NULL) < 0) |
6572 | return -errno; | |
6573 | ||
5e2b3214 LP |
6574 | if (setresuid(0, 0, 0) < 0) |
6575 | return -errno; | |
6576 | ||
bc9fd78c LP |
6577 | return 0; |
6578 | } | |
bf108e55 | 6579 | |
9f5650ae LP |
6580 | bool pid_is_unwaited(pid_t pid) { |
6581 | /* Checks whether a PID is still valid at all, including a zombie */ | |
6582 | ||
bf108e55 LP |
6583 | if (pid <= 0) |
6584 | return false; | |
6585 | ||
6586 | if (kill(pid, 0) >= 0) | |
6587 | return true; | |
6588 | ||
6589 | return errno != ESRCH; | |
6590 | } | |
eff05270 | 6591 | |
9f5650ae LP |
6592 | bool pid_is_alive(pid_t pid) { |
6593 | int r; | |
6594 | ||
6595 | /* Checks whether a PID is still valid and not a zombie */ | |
6596 | ||
6597 | if (pid <= 0) | |
6598 | return false; | |
6599 | ||
6600 | r = get_process_state(pid); | |
6601 | if (r == -ENOENT || r == 'Z') | |
6602 | return false; | |
6603 | ||
6604 | return true; | |
6605 | } | |
6606 | ||
eff05270 LP |
6607 | int getpeercred(int fd, struct ucred *ucred) { |
6608 | socklen_t n = sizeof(struct ucred); | |
6609 | struct ucred u; | |
6610 | int r; | |
6611 | ||
6612 | assert(fd >= 0); | |
6613 | assert(ucred); | |
6614 | ||
6615 | r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &u, &n); | |
6616 | if (r < 0) | |
6617 | return -errno; | |
6618 | ||
6619 | if (n != sizeof(struct ucred)) | |
6620 | return -EIO; | |
6621 | ||
6622 | /* Check if the data is actually useful and not suppressed due | |
6623 | * to namespacing issues */ | |
6624 | if (u.pid <= 0) | |
6625 | return -ENODATA; | |
fed1e721 | 6626 | if (u.uid == UID_INVALID) |
62028d9c | 6627 | return -ENODATA; |
fed1e721 | 6628 | if (u.gid == GID_INVALID) |
62028d9c | 6629 | return -ENODATA; |
eff05270 LP |
6630 | |
6631 | *ucred = u; | |
6632 | return 0; | |
6633 | } | |
6634 | ||
6635 | int getpeersec(int fd, char **ret) { | |
6636 | socklen_t n = 64; | |
6637 | char *s; | |
6638 | int r; | |
6639 | ||
6640 | assert(fd >= 0); | |
6641 | assert(ret); | |
6642 | ||
6643 | s = new0(char, n); | |
6644 | if (!s) | |
6645 | return -ENOMEM; | |
6646 | ||
6647 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6648 | if (r < 0) { | |
6649 | free(s); | |
6650 | ||
6651 | if (errno != ERANGE) | |
6652 | return -errno; | |
6653 | ||
6654 | s = new0(char, n); | |
6655 | if (!s) | |
6656 | return -ENOMEM; | |
6657 | ||
6658 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
6659 | if (r < 0) { | |
6660 | free(s); | |
6661 | return -errno; | |
6662 | } | |
6663 | } | |
6664 | ||
ae98841e LP |
6665 | if (isempty(s)) { |
6666 | free(s); | |
6667 | return -ENOTSUP; | |
6668 | } | |
6669 | ||
eff05270 LP |
6670 | *ret = s; |
6671 | return 0; | |
6672 | } | |
8e33886e | 6673 | |
0f010ef2 | 6674 | /* This is much like like mkostemp() but is subject to umask(). */ |
65b3903f | 6675 | int mkostemp_safe(char *pattern, int flags) { |
2d5bdf5b | 6676 | _cleanup_umask_ mode_t u; |
0f010ef2 | 6677 | int fd; |
65b3903f | 6678 | |
d37a91e8 | 6679 | assert(pattern); |
65b3903f | 6680 | |
2d5bdf5b LP |
6681 | u = umask(077); |
6682 | ||
0f010ef2 ZJS |
6683 | fd = mkostemp(pattern, flags); |
6684 | if (fd < 0) | |
6685 | return -errno; | |
65b3903f | 6686 | |
0f010ef2 | 6687 | return fd; |
65b3903f ZJS |
6688 | } |
6689 | ||
8e33886e | 6690 | int open_tmpfile(const char *path, int flags) { |
8e33886e | 6691 | char *p; |
a6afc4ae LP |
6692 | int fd; |
6693 | ||
6694 | assert(path); | |
8e33886e ZJS |
6695 | |
6696 | #ifdef O_TMPFILE | |
7736202c LP |
6697 | /* Try O_TMPFILE first, if it is supported */ |
6698 | fd = open(path, flags|O_TMPFILE, S_IRUSR|S_IWUSR); | |
8e33886e ZJS |
6699 | if (fd >= 0) |
6700 | return fd; | |
6701 | #endif | |
7736202c LP |
6702 | |
6703 | /* Fall back to unguessable name + unlinking */ | |
63c372cb | 6704 | p = strjoina(path, "/systemd-tmp-XXXXXX"); |
8e33886e | 6705 | |
a6afc4ae | 6706 | fd = mkostemp_safe(p, flags); |
8e33886e | 6707 | if (fd < 0) |
65b3903f | 6708 | return fd; |
8e33886e ZJS |
6709 | |
6710 | unlink(p); | |
6711 | return fd; | |
6712 | } | |
fdb9161c LP |
6713 | |
6714 | int fd_warn_permissions(const char *path, int fd) { | |
6715 | struct stat st; | |
6716 | ||
6717 | if (fstat(fd, &st) < 0) | |
6718 | return -errno; | |
6719 | ||
6720 | if (st.st_mode & 0111) | |
6721 | log_warning("Configuration file %s is marked executable. Please remove executable permission bits. Proceeding anyway.", path); | |
6722 | ||
6723 | if (st.st_mode & 0002) | |
6724 | log_warning("Configuration file %s is marked world-writable. Please remove world writability permission bits. Proceeding anyway.", path); | |
6725 | ||
6726 | if (getpid() == 1 && (st.st_mode & 0044) != 0044) | |
6727 | log_warning("Configuration file %s is marked world-inaccessible. This has no effect as configuration data is accessible via APIs without restrictions. Proceeding anyway.", path); | |
6728 | ||
6729 | return 0; | |
6730 | } | |
6afc95b7 | 6731 | |
ac45f971 | 6732 | unsigned long personality_from_string(const char *p) { |
6afc95b7 LP |
6733 | |
6734 | /* Parse a personality specifier. We introduce our own | |
6735 | * identifiers that indicate specific ABIs, rather than just | |
6736 | * hints regarding the register size, since we want to keep | |
6737 | * things open for multiple locally supported ABIs for the | |
6738 | * same register size. We try to reuse the ABI identifiers | |
6739 | * used by libseccomp. */ | |
6740 | ||
6741 | #if defined(__x86_64__) | |
6742 | ||
6743 | if (streq(p, "x86")) | |
6744 | return PER_LINUX32; | |
6745 | ||
6746 | if (streq(p, "x86-64")) | |
6747 | return PER_LINUX; | |
6748 | ||
6749 | #elif defined(__i386__) | |
6750 | ||
6751 | if (streq(p, "x86")) | |
6752 | return PER_LINUX; | |
6753 | #endif | |
6754 | ||
6755 | /* personality(7) documents that 0xffffffffUL is used for | |
6756 | * querying the current personality, hence let's use that here | |
6757 | * as error indicator. */ | |
6758 | return 0xffffffffUL; | |
6759 | } | |
ac45f971 LP |
6760 | |
6761 | const char* personality_to_string(unsigned long p) { | |
6762 | ||
6763 | #if defined(__x86_64__) | |
6764 | ||
6765 | if (p == PER_LINUX32) | |
6766 | return "x86"; | |
6767 | ||
6768 | if (p == PER_LINUX) | |
6769 | return "x86-64"; | |
6770 | ||
6771 | #elif defined(__i386__) | |
6772 | ||
6773 | if (p == PER_LINUX) | |
6774 | return "x86"; | |
6775 | #endif | |
6776 | ||
6777 | return NULL; | |
6778 | } | |
1c231f56 LP |
6779 | |
6780 | uint64_t physical_memory(void) { | |
6781 | long mem; | |
6782 | ||
6783 | /* We return this as uint64_t in case we are running as 32bit | |
6784 | * process on a 64bit kernel with huge amounts of memory */ | |
6785 | ||
6786 | mem = sysconf(_SC_PHYS_PAGES); | |
6787 | assert(mem > 0); | |
6788 | ||
6789 | return (uint64_t) mem * (uint64_t) page_size(); | |
6790 | } | |
6db615c1 | 6791 | |
29bfbcd6 LP |
6792 | void hexdump(FILE *f, const void *p, size_t s) { |
6793 | const uint8_t *b = p; | |
6794 | unsigned n = 0; | |
6795 | ||
6796 | assert(s == 0 || b); | |
6797 | ||
6798 | while (s > 0) { | |
6799 | size_t i; | |
6800 | ||
6801 | fprintf(f, "%04x ", n); | |
6802 | ||
6803 | for (i = 0; i < 16; i++) { | |
6804 | ||
6805 | if (i >= s) | |
6806 | fputs(" ", f); | |
6807 | else | |
6808 | fprintf(f, "%02x ", b[i]); | |
6809 | ||
6810 | if (i == 7) | |
6811 | fputc(' ', f); | |
6812 | } | |
6813 | ||
6814 | fputc(' ', f); | |
6815 | ||
6816 | for (i = 0; i < 16; i++) { | |
6817 | ||
6818 | if (i >= s) | |
6819 | fputc(' ', f); | |
6820 | else | |
6821 | fputc(isprint(b[i]) ? (char) b[i] : '.', f); | |
6822 | } | |
6823 | ||
6824 | fputc('\n', f); | |
6825 | ||
6826 | if (s < 16) | |
6827 | break; | |
6828 | ||
6829 | n += 16; | |
6830 | b += 16; | |
6831 | s -= 16; | |
6832 | } | |
6833 | } | |
c5220a94 | 6834 | |
966bff26 | 6835 | int update_reboot_param_file(const char *param) { |
c5220a94 MO |
6836 | int r = 0; |
6837 | ||
6838 | if (param) { | |
6839 | ||
6840 | r = write_string_file(REBOOT_PARAM_FILE, param); | |
6841 | if (r < 0) | |
6842 | log_error("Failed to write reboot param to " | |
6843 | REBOOT_PARAM_FILE": %s", strerror(-r)); | |
6844 | } else | |
6845 | unlink(REBOOT_PARAM_FILE); | |
6846 | ||
6847 | return r; | |
6848 | } | |
6d313367 LP |
6849 | |
6850 | int umount_recursive(const char *prefix, int flags) { | |
6851 | bool again; | |
6852 | int n = 0, r; | |
6853 | ||
6854 | /* Try to umount everything recursively below a | |
6855 | * directory. Also, take care of stacked mounts, and keep | |
6856 | * unmounting them until they are gone. */ | |
6857 | ||
6858 | do { | |
6859 | _cleanup_fclose_ FILE *proc_self_mountinfo = NULL; | |
6860 | ||
6861 | again = false; | |
6862 | r = 0; | |
6863 | ||
6864 | proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"); | |
6865 | if (!proc_self_mountinfo) | |
6866 | return -errno; | |
6867 | ||
6868 | for (;;) { | |
6869 | _cleanup_free_ char *path = NULL, *p = NULL; | |
6870 | int k; | |
6871 | ||
6872 | k = fscanf(proc_self_mountinfo, | |
6873 | "%*s " /* (1) mount id */ | |
6874 | "%*s " /* (2) parent id */ | |
6875 | "%*s " /* (3) major:minor */ | |
6876 | "%*s " /* (4) root */ | |
6877 | "%ms " /* (5) mount point */ | |
6878 | "%*s" /* (6) mount options */ | |
6879 | "%*[^-]" /* (7) optional fields */ | |
6880 | "- " /* (8) separator */ | |
6881 | "%*s " /* (9) file system type */ | |
6882 | "%*s" /* (10) mount source */ | |
6883 | "%*s" /* (11) mount options 2 */ | |
6884 | "%*[^\n]", /* some rubbish at the end */ | |
6885 | &path); | |
6d313367 LP |
6886 | if (k != 1) { |
6887 | if (k == EOF) | |
6888 | break; | |
6889 | ||
6890 | continue; | |
6891 | } | |
6892 | ||
6893 | p = cunescape(path); | |
6894 | if (!p) | |
6895 | return -ENOMEM; | |
6896 | ||
6897 | if (!path_startswith(p, prefix)) | |
6898 | continue; | |
6899 | ||
6900 | if (umount2(p, flags) < 0) { | |
6901 | r = -errno; | |
6902 | continue; | |
6903 | } | |
6904 | ||
6905 | again = true; | |
6906 | n++; | |
6907 | ||
6908 | break; | |
6909 | } | |
6910 | ||
6911 | } while (again); | |
6912 | ||
6913 | return r ? r : n; | |
6914 | } | |
d6797c92 | 6915 | |
abe4aa14 TM |
6916 | static int get_mount_flags(const char *path, unsigned long *flags) { |
6917 | struct statvfs buf; | |
6918 | ||
6919 | if (statvfs(path, &buf) < 0) | |
6920 | return -errno; | |
6921 | *flags = buf.f_flag; | |
6922 | return 0; | |
6923 | } | |
6924 | ||
d6797c92 LP |
6925 | int bind_remount_recursive(const char *prefix, bool ro) { |
6926 | _cleanup_set_free_free_ Set *done = NULL; | |
6927 | _cleanup_free_ char *cleaned = NULL; | |
6928 | int r; | |
6929 | ||
6930 | /* Recursively remount a directory (and all its submounts) | |
6931 | * read-only or read-write. If the directory is already | |
6932 | * mounted, we reuse the mount and simply mark it | |
6933 | * MS_BIND|MS_RDONLY (or remove the MS_RDONLY for read-write | |
6934 | * operation). If it isn't we first make it one. Afterwards we | |
6935 | * apply MS_BIND|MS_RDONLY (or remove MS_RDONLY) to all | |
6936 | * submounts we can access, too. When mounts are stacked on | |
6937 | * the same mount point we only care for each individual | |
6938 | * "top-level" mount on each point, as we cannot | |
6939 | * influence/access the underlying mounts anyway. We do not | |
6940 | * have any effect on future submounts that might get | |
6941 | * propagated, they migt be writable. This includes future | |
6942 | * submounts that have been triggered via autofs. */ | |
6943 | ||
6944 | cleaned = strdup(prefix); | |
6945 | if (!cleaned) | |
6946 | return -ENOMEM; | |
6947 | ||
6948 | path_kill_slashes(cleaned); | |
6949 | ||
d5099efc | 6950 | done = set_new(&string_hash_ops); |
d6797c92 LP |
6951 | if (!done) |
6952 | return -ENOMEM; | |
6953 | ||
6954 | for (;;) { | |
6955 | _cleanup_fclose_ FILE *proc_self_mountinfo = NULL; | |
6956 | _cleanup_set_free_free_ Set *todo = NULL; | |
6957 | bool top_autofs = false; | |
6958 | char *x; | |
abe4aa14 | 6959 | unsigned long orig_flags; |
d6797c92 | 6960 | |
d5099efc | 6961 | todo = set_new(&string_hash_ops); |
d6797c92 LP |
6962 | if (!todo) |
6963 | return -ENOMEM; | |
6964 | ||
6965 | proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"); | |
6966 | if (!proc_self_mountinfo) | |
6967 | return -errno; | |
6968 | ||
6969 | for (;;) { | |
6970 | _cleanup_free_ char *path = NULL, *p = NULL, *type = NULL; | |
6971 | int k; | |
6972 | ||
6973 | k = fscanf(proc_self_mountinfo, | |
6974 | "%*s " /* (1) mount id */ | |
6975 | "%*s " /* (2) parent id */ | |
6976 | "%*s " /* (3) major:minor */ | |
6977 | "%*s " /* (4) root */ | |
6978 | "%ms " /* (5) mount point */ | |
6979 | "%*s" /* (6) mount options (superblock) */ | |
6980 | "%*[^-]" /* (7) optional fields */ | |
6981 | "- " /* (8) separator */ | |
6982 | "%ms " /* (9) file system type */ | |
6983 | "%*s" /* (10) mount source */ | |
6984 | "%*s" /* (11) mount options (bind mount) */ | |
6985 | "%*[^\n]", /* some rubbish at the end */ | |
6986 | &path, | |
6987 | &type); | |
6988 | if (k != 2) { | |
6989 | if (k == EOF) | |
6990 | break; | |
6991 | ||
6992 | continue; | |
6993 | } | |
6994 | ||
6995 | p = cunescape(path); | |
6996 | if (!p) | |
6997 | return -ENOMEM; | |
6998 | ||
6999 | /* Let's ignore autofs mounts. If they aren't | |
7000 | * triggered yet, we want to avoid triggering | |
7001 | * them, as we don't make any guarantees for | |
7002 | * future submounts anyway. If they are | |
7003 | * already triggered, then we will find | |
7004 | * another entry for this. */ | |
7005 | if (streq(type, "autofs")) { | |
7006 | top_autofs = top_autofs || path_equal(cleaned, p); | |
7007 | continue; | |
7008 | } | |
7009 | ||
7010 | if (path_startswith(p, cleaned) && | |
7011 | !set_contains(done, p)) { | |
7012 | ||
7013 | r = set_consume(todo, p); | |
7014 | p = NULL; | |
7015 | ||
7016 | if (r == -EEXIST) | |
7017 | continue; | |
7018 | if (r < 0) | |
7019 | return r; | |
7020 | } | |
7021 | } | |
7022 | ||
7023 | /* If we have no submounts to process anymore and if | |
7024 | * the root is either already done, or an autofs, we | |
7025 | * are done */ | |
7026 | if (set_isempty(todo) && | |
7027 | (top_autofs || set_contains(done, cleaned))) | |
7028 | return 0; | |
7029 | ||
7030 | if (!set_contains(done, cleaned) && | |
7031 | !set_contains(todo, cleaned)) { | |
7032 | /* The prefix directory itself is not yet a | |
7033 | * mount, make it one. */ | |
7034 | if (mount(cleaned, cleaned, NULL, MS_BIND|MS_REC, NULL) < 0) | |
7035 | return -errno; | |
7036 | ||
a7e07206 LP |
7037 | orig_flags = 0; |
7038 | (void) get_mount_flags(cleaned, &orig_flags); | |
abe4aa14 | 7039 | orig_flags &= ~MS_RDONLY; |
a7e07206 | 7040 | |
abe4aa14 | 7041 | if (mount(NULL, prefix, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) |
d6797c92 LP |
7042 | return -errno; |
7043 | ||
7044 | x = strdup(cleaned); | |
7045 | if (!x) | |
7046 | return -ENOMEM; | |
7047 | ||
7048 | r = set_consume(done, x); | |
7049 | if (r < 0) | |
7050 | return r; | |
7051 | } | |
7052 | ||
7053 | while ((x = set_steal_first(todo))) { | |
7054 | ||
7055 | r = set_consume(done, x); | |
7056 | if (r == -EEXIST) | |
7057 | continue; | |
7058 | if (r < 0) | |
7059 | return r; | |
7060 | ||
a7e07206 LP |
7061 | /* Try to reuse the original flag set, but |
7062 | * don't care for errors, in case of | |
7063 | * obstructed mounts */ | |
7064 | orig_flags = 0; | |
7065 | (void) get_mount_flags(x, &orig_flags); | |
abe4aa14 | 7066 | orig_flags &= ~MS_RDONLY; |
a7e07206 | 7067 | |
abe4aa14 | 7068 | if (mount(NULL, x, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) { |
d6797c92 LP |
7069 | |
7070 | /* Deal with mount points that are | |
7071 | * obstructed by a later mount */ | |
7072 | ||
7073 | if (errno != ENOENT) | |
7074 | return -errno; | |
7075 | } | |
7076 | ||
7077 | } | |
7078 | } | |
7079 | } | |
1b992147 LP |
7080 | |
7081 | int fflush_and_check(FILE *f) { | |
45c196a7 | 7082 | assert(f); |
1b992147 LP |
7083 | |
7084 | errno = 0; | |
7085 | fflush(f); | |
7086 | ||
7087 | if (ferror(f)) | |
7088 | return errno ? -errno : -EIO; | |
7089 | ||
7090 | return 0; | |
7091 | } | |
2e78fa79 | 7092 | |
ae6c3cc0 | 7093 | int tempfn_xxxxxx(const char *p, char **ret) { |
2e78fa79 LP |
7094 | const char *fn; |
7095 | char *t; | |
2e78fa79 LP |
7096 | |
7097 | assert(p); | |
ae6c3cc0 LP |
7098 | assert(ret); |
7099 | ||
c4e34a61 LP |
7100 | /* |
7101 | * Turns this: | |
7102 | * /foo/bar/waldo | |
7103 | * | |
7104 | * Into this: | |
8eebf6ad | 7105 | * /foo/bar/.#waldoXXXXXX |
c4e34a61 LP |
7106 | */ |
7107 | ||
ae6c3cc0 LP |
7108 | fn = basename(p); |
7109 | if (!filename_is_valid(fn)) | |
7110 | return -EINVAL; | |
2e78fa79 | 7111 | |
8eebf6ad | 7112 | t = new(char, strlen(p) + 2 + 6 + 1); |
2e78fa79 | 7113 | if (!t) |
ae6c3cc0 | 7114 | return -ENOMEM; |
2e78fa79 | 7115 | |
8eebf6ad | 7116 | strcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), fn), "XXXXXX"); |
2e78fa79 | 7117 | |
c4e34a61 | 7118 | *ret = path_kill_slashes(t); |
ae6c3cc0 | 7119 | return 0; |
2e78fa79 LP |
7120 | } |
7121 | ||
ae6c3cc0 | 7122 | int tempfn_random(const char *p, char **ret) { |
2e78fa79 LP |
7123 | const char *fn; |
7124 | char *t, *x; | |
7125 | uint64_t u; | |
2e78fa79 LP |
7126 | unsigned i; |
7127 | ||
7128 | assert(p); | |
ae6c3cc0 LP |
7129 | assert(ret); |
7130 | ||
c4e34a61 LP |
7131 | /* |
7132 | * Turns this: | |
7133 | * /foo/bar/waldo | |
7134 | * | |
7135 | * Into this: | |
8eebf6ad | 7136 | * /foo/bar/.#waldobaa2a261115984a9 |
c4e34a61 LP |
7137 | */ |
7138 | ||
ae6c3cc0 LP |
7139 | fn = basename(p); |
7140 | if (!filename_is_valid(fn)) | |
7141 | return -EINVAL; | |
2e78fa79 | 7142 | |
8eebf6ad | 7143 | t = new(char, strlen(p) + 2 + 16 + 1); |
2e78fa79 | 7144 | if (!t) |
ae6c3cc0 | 7145 | return -ENOMEM; |
2e78fa79 | 7146 | |
8eebf6ad | 7147 | x = stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), fn); |
2e78fa79 LP |
7148 | |
7149 | u = random_u64(); | |
7150 | for (i = 0; i < 16; i++) { | |
7151 | *(x++) = hexchar(u & 0xF); | |
7152 | u >>= 4; | |
7153 | } | |
7154 | ||
7155 | *x = 0; | |
7156 | ||
c4e34a61 LP |
7157 | *ret = path_kill_slashes(t); |
7158 | return 0; | |
7159 | } | |
7160 | ||
7161 | int tempfn_random_child(const char *p, char **ret) { | |
7162 | char *t, *x; | |
7163 | uint64_t u; | |
7164 | unsigned i; | |
7165 | ||
7166 | assert(p); | |
7167 | assert(ret); | |
7168 | ||
7169 | /* Turns this: | |
7170 | * /foo/bar/waldo | |
7171 | * Into this: | |
8eebf6ad | 7172 | * /foo/bar/waldo/.#3c2b6219aa75d7d0 |
c4e34a61 LP |
7173 | */ |
7174 | ||
8eebf6ad | 7175 | t = new(char, strlen(p) + 3 + 16 + 1); |
c4e34a61 LP |
7176 | if (!t) |
7177 | return -ENOMEM; | |
7178 | ||
8eebf6ad | 7179 | x = stpcpy(stpcpy(t, p), "/.#"); |
c4e34a61 LP |
7180 | |
7181 | u = random_u64(); | |
7182 | for (i = 0; i < 16; i++) { | |
7183 | *(x++) = hexchar(u & 0xF); | |
7184 | u >>= 4; | |
7185 | } | |
7186 | ||
7187 | *x = 0; | |
7188 | ||
7189 | *ret = path_kill_slashes(t); | |
ae6c3cc0 | 7190 | return 0; |
2e78fa79 | 7191 | } |
fecc80c1 LP |
7192 | |
7193 | /* make sure the hostname is not "localhost" */ | |
7194 | bool is_localhost(const char *hostname) { | |
7195 | assert(hostname); | |
7196 | ||
a0627f82 LP |
7197 | /* This tries to identify local host and domain names |
7198 | * described in RFC6761 plus the redhatism of .localdomain */ | |
fecc80c1 LP |
7199 | |
7200 | return streq(hostname, "localhost") || | |
7201 | streq(hostname, "localhost.") || | |
a0627f82 LP |
7202 | streq(hostname, "localdomain.") || |
7203 | streq(hostname, "localdomain") || | |
fecc80c1 LP |
7204 | endswith(hostname, ".localhost") || |
7205 | endswith(hostname, ".localhost.") || | |
7206 | endswith(hostname, ".localdomain") || | |
7207 | endswith(hostname, ".localdomain."); | |
7208 | } | |
45035609 LP |
7209 | |
7210 | int take_password_lock(const char *root) { | |
7211 | ||
7212 | struct flock flock = { | |
7213 | .l_type = F_WRLCK, | |
7214 | .l_whence = SEEK_SET, | |
7215 | .l_start = 0, | |
7216 | .l_len = 0, | |
7217 | }; | |
7218 | ||
7219 | const char *path; | |
7220 | int fd, r; | |
7221 | ||
7222 | /* This is roughly the same as lckpwdf(), but not as awful. We | |
7223 | * don't want to use alarm() and signals, hence we implement | |
7224 | * our own trivial version of this. | |
7225 | * | |
7226 | * Note that shadow-utils also takes per-database locks in | |
7227 | * addition to lckpwdf(). However, we don't given that they | |
7228 | * are redundant as they they invoke lckpwdf() first and keep | |
7229 | * it during everything they do. The per-database locks are | |
7230 | * awfully racy, and thus we just won't do them. */ | |
7231 | ||
7232 | if (root) | |
63c372cb | 7233 | path = strjoina(root, "/etc/.pwd.lock"); |
45035609 LP |
7234 | else |
7235 | path = "/etc/.pwd.lock"; | |
7236 | ||
7237 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0600); | |
7238 | if (fd < 0) | |
7239 | return -errno; | |
7240 | ||
7241 | r = fcntl(fd, F_SETLKW, &flock); | |
7242 | if (r < 0) { | |
7243 | safe_close(fd); | |
7244 | return -errno; | |
7245 | } | |
7246 | ||
7247 | return fd; | |
7248 | } | |
5261ba90 TT |
7249 | |
7250 | int is_symlink(const char *path) { | |
7251 | struct stat info; | |
7252 | ||
7253 | if (lstat(path, &info) < 0) | |
7254 | return -errno; | |
7255 | ||
be57e297 LP |
7256 | return !!S_ISLNK(info.st_mode); |
7257 | } | |
5261ba90 | 7258 | |
be57e297 LP |
7259 | int is_dir(const char* path, bool follow) { |
7260 | struct stat st; | |
d1bddcec | 7261 | int r; |
be57e297 | 7262 | |
d1bddcec LP |
7263 | if (follow) |
7264 | r = stat(path, &st); | |
7265 | else | |
7266 | r = lstat(path, &st); | |
7267 | if (r < 0) | |
7268 | return -errno; | |
be57e297 LP |
7269 | |
7270 | return !!S_ISDIR(st.st_mode); | |
a0627f82 | 7271 | } |
7629889c | 7272 | |
f32d2db1 | 7273 | int unquote_first_word(const char **p, char **ret, bool relax) { |
7629889c LP |
7274 | _cleanup_free_ char *s = NULL; |
7275 | size_t allocated = 0, sz = 0; | |
7276 | ||
7277 | enum { | |
7278 | START, | |
7279 | VALUE, | |
7280 | VALUE_ESCAPE, | |
7281 | SINGLE_QUOTE, | |
7282 | SINGLE_QUOTE_ESCAPE, | |
7283 | DOUBLE_QUOTE, | |
7284 | DOUBLE_QUOTE_ESCAPE, | |
7285 | SPACE, | |
7286 | } state = START; | |
7287 | ||
7288 | assert(p); | |
7289 | assert(*p); | |
7290 | assert(ret); | |
7291 | ||
7292 | /* Parses the first word of a string, and returns it in | |
7293 | * *ret. Removes all quotes in the process. When parsing fails | |
7294 | * (because of an uneven number of quotes or similar), leaves | |
7295 | * the pointer *p at the first invalid character. */ | |
7296 | ||
7297 | for (;;) { | |
7298 | char c = **p; | |
7299 | ||
7300 | switch (state) { | |
7301 | ||
7302 | case START: | |
7303 | if (c == 0) | |
7304 | goto finish; | |
7305 | else if (strchr(WHITESPACE, c)) | |
7306 | break; | |
7307 | ||
7308 | state = VALUE; | |
7309 | /* fallthrough */ | |
7310 | ||
7311 | case VALUE: | |
7312 | if (c == 0) | |
7313 | goto finish; | |
7314 | else if (c == '\'') | |
7315 | state = SINGLE_QUOTE; | |
7316 | else if (c == '\\') | |
7317 | state = VALUE_ESCAPE; | |
7318 | else if (c == '\"') | |
7319 | state = DOUBLE_QUOTE; | |
7320 | else if (strchr(WHITESPACE, c)) | |
7321 | state = SPACE; | |
7322 | else { | |
7323 | if (!GREEDY_REALLOC(s, allocated, sz+2)) | |
7324 | return -ENOMEM; | |
7325 | ||
7326 | s[sz++] = c; | |
7327 | } | |
7328 | ||
7329 | break; | |
7330 | ||
7331 | case VALUE_ESCAPE: | |
f32d2db1 LP |
7332 | if (c == 0) { |
7333 | if (relax) | |
7334 | goto finish; | |
7629889c | 7335 | return -EINVAL; |
f32d2db1 | 7336 | } |
7629889c LP |
7337 | |
7338 | if (!GREEDY_REALLOC(s, allocated, sz+2)) | |
7339 | return -ENOMEM; | |
7340 | ||
7341 | s[sz++] = c; | |
7342 | state = VALUE; | |
7343 | ||
7344 | break; | |
7345 | ||
7346 | case SINGLE_QUOTE: | |
f32d2db1 LP |
7347 | if (c == 0) { |
7348 | if (relax) | |
7349 | goto finish; | |
7629889c | 7350 | return -EINVAL; |
f32d2db1 | 7351 | } else if (c == '\'') |
7629889c LP |
7352 | state = VALUE; |
7353 | else if (c == '\\') | |
7354 | state = SINGLE_QUOTE_ESCAPE; | |
7355 | else { | |
7356 | if (!GREEDY_REALLOC(s, allocated, sz+2)) | |
7357 | return -ENOMEM; | |
7358 | ||
7359 | s[sz++] = c; | |
7360 | } | |
7361 | ||
7362 | break; | |
7363 | ||
7364 | case SINGLE_QUOTE_ESCAPE: | |
f32d2db1 LP |
7365 | if (c == 0) { |
7366 | if (relax) | |
7367 | goto finish; | |
7629889c | 7368 | return -EINVAL; |
f32d2db1 | 7369 | } |
7629889c LP |
7370 | |
7371 | if (!GREEDY_REALLOC(s, allocated, sz+2)) | |
7372 | return -ENOMEM; | |
7373 | ||
7374 | s[sz++] = c; | |
7375 | state = SINGLE_QUOTE; | |
7376 | break; | |
7377 | ||
7378 | case DOUBLE_QUOTE: | |
7379 | if (c == 0) | |
7380 | return -EINVAL; | |
7381 | else if (c == '\"') | |
7382 | state = VALUE; | |
7383 | else if (c == '\\') | |
7384 | state = DOUBLE_QUOTE_ESCAPE; | |
7385 | else { | |
7386 | if (!GREEDY_REALLOC(s, allocated, sz+2)) | |
7387 | return -ENOMEM; | |
7388 | ||
7389 | s[sz++] = c; | |
7390 | } | |
7391 | ||
7392 | break; | |
7393 | ||
7394 | case DOUBLE_QUOTE_ESCAPE: | |
f32d2db1 LP |
7395 | if (c == 0) { |
7396 | if (relax) | |
7397 | goto finish; | |
7629889c | 7398 | return -EINVAL; |
f32d2db1 | 7399 | } |
7629889c LP |
7400 | |
7401 | if (!GREEDY_REALLOC(s, allocated, sz+2)) | |
7402 | return -ENOMEM; | |
7403 | ||
7404 | s[sz++] = c; | |
7405 | state = DOUBLE_QUOTE; | |
7406 | break; | |
7407 | ||
7408 | case SPACE: | |
7409 | if (c == 0) | |
7410 | goto finish; | |
7411 | if (!strchr(WHITESPACE, c)) | |
7412 | goto finish; | |
7413 | ||
7414 | break; | |
7415 | } | |
7416 | ||
7417 | (*p) ++; | |
7418 | } | |
7419 | ||
7420 | finish: | |
7421 | if (!s) { | |
7422 | *ret = NULL; | |
7423 | return 0; | |
7424 | } | |
7425 | ||
7426 | s[sz] = 0; | |
7427 | *ret = s; | |
7428 | s = NULL; | |
7429 | ||
7430 | return 1; | |
7431 | } | |
7432 | ||
7433 | int unquote_many_words(const char **p, ...) { | |
7434 | va_list ap; | |
7435 | char **l; | |
7436 | int n = 0, i, c, r; | |
7437 | ||
7438 | /* Parses a number of words from a string, stripping any | |
7439 | * quotes if necessary. */ | |
7440 | ||
7441 | assert(p); | |
7442 | ||
7443 | /* Count how many words are expected */ | |
7444 | va_start(ap, p); | |
7445 | for (;;) { | |
7446 | if (!va_arg(ap, char **)) | |
7447 | break; | |
7448 | n++; | |
7449 | } | |
7450 | va_end(ap); | |
7451 | ||
7452 | if (n <= 0) | |
7453 | return 0; | |
7454 | ||
7455 | /* Read all words into a temporary array */ | |
7456 | l = newa0(char*, n); | |
7457 | for (c = 0; c < n; c++) { | |
7458 | ||
f32d2db1 | 7459 | r = unquote_first_word(p, &l[c], false); |
7629889c LP |
7460 | if (r < 0) { |
7461 | int j; | |
7462 | ||
081e009b | 7463 | for (j = 0; j < c; j++) |
7629889c | 7464 | free(l[j]); |
081e009b LN |
7465 | |
7466 | return r; | |
7629889c LP |
7467 | } |
7468 | ||
7469 | if (r == 0) | |
7470 | break; | |
7471 | } | |
7472 | ||
7473 | /* If we managed to parse all words, return them in the passed | |
7474 | * in parameters */ | |
7475 | va_start(ap, p); | |
7476 | for (i = 0; i < n; i++) { | |
7477 | char **v; | |
7478 | ||
7479 | v = va_arg(ap, char **); | |
7480 | assert(v); | |
7481 | ||
7482 | *v = l[i]; | |
7483 | } | |
7484 | va_end(ap); | |
7485 | ||
7486 | return c; | |
7487 | } | |
2928b0a8 LP |
7488 | |
7489 | int free_and_strdup(char **p, const char *s) { | |
7490 | char *t; | |
7491 | ||
7492 | assert(p); | |
7493 | ||
7494 | /* Replaces a string pointer with an strdup()ed new string, | |
7495 | * possibly freeing the old one. */ | |
7496 | ||
7497 | if (s) { | |
7498 | t = strdup(s); | |
7499 | if (!t) | |
7500 | return -ENOMEM; | |
7501 | } else | |
7502 | t = NULL; | |
7503 | ||
7504 | free(*p); | |
7505 | *p = t; | |
7506 | ||
7507 | return 0; | |
7508 | } | |
605f81a8 MS |
7509 | |
7510 | int sethostname_idempotent(const char *s) { | |
7511 | int r; | |
7512 | char buf[HOST_NAME_MAX + 1] = {}; | |
7513 | ||
7514 | assert(s); | |
7515 | ||
7516 | r = gethostname(buf, sizeof(buf)); | |
7517 | if (r < 0) | |
7518 | return -errno; | |
7519 | ||
7520 | if (streq(buf, s)) | |
7521 | return 0; | |
7522 | ||
a9169c1c | 7523 | r = sethostname(s, strlen(s)); |
605f81a8 MS |
7524 | if (r < 0) |
7525 | return -errno; | |
7526 | ||
7527 | return 1; | |
7528 | } | |
ee451d76 LP |
7529 | |
7530 | int ptsname_malloc(int fd, char **ret) { | |
7531 | size_t l = 100; | |
7532 | ||
9d8c4979 LP |
7533 | assert(fd >= 0); |
7534 | assert(ret); | |
7535 | ||
ee451d76 LP |
7536 | for (;;) { |
7537 | char *c; | |
7538 | ||
7539 | c = new(char, l); | |
7540 | if (!c) | |
7541 | return -ENOMEM; | |
7542 | ||
7543 | if (ptsname_r(fd, c, l) == 0) { | |
7544 | *ret = c; | |
7545 | return 0; | |
7546 | } | |
7547 | if (errno != ERANGE) { | |
7548 | free(c); | |
7549 | return -errno; | |
7550 | } | |
7551 | ||
7552 | free(c); | |
7553 | l *= 2; | |
7554 | } | |
7555 | } | |
5f8cc96a LP |
7556 | |
7557 | int openpt_in_namespace(pid_t pid, int flags) { | |
7558 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, rootfd = -1; | |
7559 | _cleanup_close_pair_ int pair[2] = { -1, -1 }; | |
7560 | union { | |
7561 | struct cmsghdr cmsghdr; | |
7562 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
7563 | } control = {}; | |
7564 | struct msghdr mh = { | |
7565 | .msg_control = &control, | |
7566 | .msg_controllen = sizeof(control), | |
7567 | }; | |
7568 | struct cmsghdr *cmsg; | |
7569 | siginfo_t si; | |
7570 | pid_t child; | |
7571 | int r; | |
7572 | ||
7573 | assert(pid > 0); | |
7574 | ||
7575 | r = namespace_open(pid, &pidnsfd, &mntnsfd, NULL, &rootfd); | |
7576 | if (r < 0) | |
7577 | return r; | |
7578 | ||
7579 | if (socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) < 0) | |
7580 | return -errno; | |
7581 | ||
7582 | child = fork(); | |
7583 | if (child < 0) | |
7584 | return -errno; | |
7585 | ||
7586 | if (child == 0) { | |
7587 | int master; | |
7588 | ||
7589 | pair[0] = safe_close(pair[0]); | |
7590 | ||
7591 | r = namespace_enter(pidnsfd, mntnsfd, -1, rootfd); | |
7592 | if (r < 0) | |
7593 | _exit(EXIT_FAILURE); | |
7594 | ||
7595 | master = posix_openpt(flags); | |
7596 | if (master < 0) | |
7597 | _exit(EXIT_FAILURE); | |
7598 | ||
7599 | cmsg = CMSG_FIRSTHDR(&mh); | |
7600 | cmsg->cmsg_level = SOL_SOCKET; | |
7601 | cmsg->cmsg_type = SCM_RIGHTS; | |
7602 | cmsg->cmsg_len = CMSG_LEN(sizeof(int)); | |
7603 | memcpy(CMSG_DATA(cmsg), &master, sizeof(int)); | |
7604 | ||
7605 | mh.msg_controllen = cmsg->cmsg_len; | |
7606 | ||
7607 | if (sendmsg(pair[1], &mh, MSG_NOSIGNAL) < 0) | |
7608 | _exit(EXIT_FAILURE); | |
7609 | ||
7610 | _exit(EXIT_SUCCESS); | |
7611 | } | |
7612 | ||
7613 | pair[1] = safe_close(pair[1]); | |
7614 | ||
7615 | r = wait_for_terminate(child, &si); | |
7616 | if (r < 0) | |
7617 | return r; | |
7618 | if (si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS) | |
7619 | return -EIO; | |
7620 | ||
7621 | if (recvmsg(pair[0], &mh, MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) < 0) | |
7622 | return -errno; | |
7623 | ||
7624 | for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) | |
7625 | if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) { | |
7626 | int *fds; | |
7627 | unsigned n_fds; | |
7628 | ||
7629 | fds = (int*) CMSG_DATA(cmsg); | |
7630 | n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int); | |
7631 | ||
7632 | if (n_fds != 1) { | |
7633 | close_many(fds, n_fds); | |
7634 | return -EIO; | |
7635 | } | |
7636 | ||
7637 | return fds[0]; | |
7638 | } | |
7639 | ||
7640 | return -EIO; | |
7641 | } | |
4a4d89b6 | 7642 | |
10f9c755 LP |
7643 | ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags) { |
7644 | _cleanup_close_ int fd = -1; | |
7645 | ssize_t l; | |
7646 | ||
7647 | /* The kernel doesn't have a fgetxattrat() command, hence let's emulate one */ | |
7648 | ||
7649 | fd = openat(dirfd, filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOATIME|(flags & AT_SYMLINK_NOFOLLOW ? O_NOFOLLOW : 0)); | |
7650 | if (fd < 0) | |
7651 | return -errno; | |
7652 | ||
7653 | l = fgetxattr(fd, attribute, value, size); | |
7654 | if (l < 0) | |
7655 | return -errno; | |
7656 | ||
7657 | return l; | |
7658 | } | |
7659 | ||
7660 | static int parse_crtime(le64_t le, usec_t *usec) { | |
4a4d89b6 | 7661 | uint64_t u; |
10f9c755 LP |
7662 | |
7663 | assert(usec); | |
7664 | ||
7665 | u = le64toh(le); | |
7666 | if (u == 0 || u == (uint64_t) -1) | |
7667 | return -EIO; | |
7668 | ||
7669 | *usec = (usec_t) u; | |
7670 | return 0; | |
7671 | } | |
7672 | ||
7673 | int fd_getcrtime(int fd, usec_t *usec) { | |
4a4d89b6 LP |
7674 | le64_t le; |
7675 | ssize_t n; | |
7676 | ||
7677 | assert(fd >= 0); | |
7678 | assert(usec); | |
7679 | ||
7680 | /* Until Linux gets a real concept of birthtime/creation time, | |
7681 | * let's fake one with xattrs */ | |
7682 | ||
7683 | n = fgetxattr(fd, "user.crtime_usec", &le, sizeof(le)); | |
7684 | if (n < 0) | |
7685 | return -errno; | |
7686 | if (n != sizeof(le)) | |
7687 | return -EIO; | |
7688 | ||
10f9c755 LP |
7689 | return parse_crtime(le, usec); |
7690 | } | |
7691 | ||
7692 | int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags) { | |
7693 | le64_t le; | |
7694 | ssize_t n; | |
7695 | ||
7696 | n = fgetxattrat_fake(dirfd, name, "user.crtime_usec", &le, sizeof(le), flags); | |
7697 | if (n < 0) | |
7698 | return -errno; | |
7699 | if (n != sizeof(le)) | |
4a4d89b6 LP |
7700 | return -EIO; |
7701 | ||
10f9c755 | 7702 | return parse_crtime(le, usec); |
4a4d89b6 LP |
7703 | } |
7704 | ||
7705 | int path_getcrtime(const char *p, usec_t *usec) { | |
4a4d89b6 LP |
7706 | le64_t le; |
7707 | ssize_t n; | |
7708 | ||
7709 | assert(p); | |
7710 | assert(usec); | |
7711 | ||
7712 | n = getxattr(p, "user.crtime_usec", &le, sizeof(le)); | |
7713 | if (n < 0) | |
7714 | return -errno; | |
7715 | if (n != sizeof(le)) | |
7716 | return -EIO; | |
7717 | ||
10f9c755 | 7718 | return parse_crtime(le, usec); |
4a4d89b6 LP |
7719 | } |
7720 | ||
7721 | int fd_setcrtime(int fd, usec_t usec) { | |
7722 | le64_t le; | |
7723 | ||
7724 | assert(fd >= 0); | |
7725 | ||
d61b600d LP |
7726 | if (usec <= 0) |
7727 | usec = now(CLOCK_REALTIME); | |
7728 | ||
4a4d89b6 | 7729 | le = htole64((uint64_t) usec); |
2c39ea52 | 7730 | if (fsetxattr(fd, "user.crtime_usec", &le, sizeof(le), 0) < 0) |
4a4d89b6 LP |
7731 | return -errno; |
7732 | ||
7733 | return 0; | |
7734 | } | |
a354329f LP |
7735 | |
7736 | int same_fd(int a, int b) { | |
7737 | struct stat sta, stb; | |
f7ad54a3 LP |
7738 | pid_t pid; |
7739 | int r, fa, fb; | |
a354329f LP |
7740 | |
7741 | assert(a >= 0); | |
7742 | assert(b >= 0); | |
7743 | ||
f7ad54a3 LP |
7744 | /* Compares two file descriptors. Note that semantics are |
7745 | * quite different depending on whether we have kcmp() or we | |
7746 | * don't. If we have kcmp() this will only return true for | |
7747 | * dup()ed file descriptors, but not otherwise. If we don't | |
7748 | * have kcmp() this will also return true for two fds of the same | |
7749 | * file, created by separate open() calls. Since we use this | |
7750 | * call mostly for filtering out duplicates in the fd store | |
7751 | * this difference hopefully doesn't matter too much. */ | |
7752 | ||
a354329f LP |
7753 | if (a == b) |
7754 | return true; | |
7755 | ||
f7ad54a3 LP |
7756 | /* Try to use kcmp() if we have it. */ |
7757 | pid = getpid(); | |
7758 | r = kcmp(pid, pid, KCMP_FILE, a, b); | |
7759 | if (r == 0) | |
7760 | return true; | |
7761 | if (r > 0) | |
7762 | return false; | |
7763 | if (errno != ENOSYS) | |
7764 | return -errno; | |
7765 | ||
7766 | /* We don't have kcmp(), use fstat() instead. */ | |
a354329f LP |
7767 | if (fstat(a, &sta) < 0) |
7768 | return -errno; | |
7769 | ||
7770 | if (fstat(b, &stb) < 0) | |
7771 | return -errno; | |
7772 | ||
7773 | if ((sta.st_mode & S_IFMT) != (stb.st_mode & S_IFMT)) | |
7774 | return false; | |
7775 | ||
f7ad54a3 LP |
7776 | /* We consider all device fds different, since two device fds |
7777 | * might refer to quite different device contexts even though | |
7778 | * they share the same inode and backing dev_t. */ | |
a354329f | 7779 | |
f7ad54a3 LP |
7780 | if (S_ISCHR(sta.st_mode) || S_ISBLK(sta.st_mode)) |
7781 | return false; | |
7782 | ||
7783 | if (sta.st_dev != stb.st_dev || sta.st_ino != stb.st_ino) | |
7784 | return false; | |
7785 | ||
7786 | /* The fds refer to the same inode on disk, let's also check | |
7787 | * if they have the same fd flags. This is useful to | |
7788 | * distuingish the read and write side of a pipe created with | |
7789 | * pipe(). */ | |
7790 | fa = fcntl(a, F_GETFL); | |
7791 | if (fa < 0) | |
7792 | return -errno; | |
7793 | ||
7794 | fb = fcntl(b, F_GETFL); | |
7795 | if (fb < 0) | |
7796 | return -errno; | |
7797 | ||
7798 | return fa == fb; | |
a354329f | 7799 | } |
11689d2a | 7800 | |
45030287 LP |
7801 | int chattr_fd(int fd, bool b, unsigned mask) { |
7802 | unsigned old_attr, new_attr; | |
11689d2a LP |
7803 | |
7804 | assert(fd >= 0); | |
7805 | ||
45030287 LP |
7806 | if (mask == 0) |
7807 | return 0; | |
7808 | ||
11689d2a LP |
7809 | if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0) |
7810 | return -errno; | |
7811 | ||
7812 | if (b) | |
7813 | new_attr = old_attr | mask; | |
7814 | else | |
7815 | new_attr = old_attr & ~mask; | |
7816 | ||
7817 | if (new_attr == old_attr) | |
7818 | return 0; | |
7819 | ||
7820 | if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0) | |
7821 | return -errno; | |
7822 | ||
7823 | return 0; | |
7824 | } | |
7825 | ||
45030287 | 7826 | int chattr_path(const char *p, bool b, unsigned mask) { |
11689d2a LP |
7827 | _cleanup_close_ int fd = -1; |
7828 | ||
45030287 LP |
7829 | assert(p); |
7830 | ||
7831 | if (mask == 0) | |
7832 | return 0; | |
7833 | ||
01b72568 | 7834 | fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW); |
11689d2a LP |
7835 | if (fd < 0) |
7836 | return -errno; | |
7837 | ||
7838 | return chattr_fd(fd, b, mask); | |
7839 | } | |
01b72568 LP |
7840 | |
7841 | int read_attr_fd(int fd, unsigned *ret) { | |
7842 | assert(fd >= 0); | |
7843 | ||
7844 | if (ioctl(fd, FS_IOC_GETFLAGS, ret) < 0) | |
7845 | return -errno; | |
7846 | ||
7847 | return 0; | |
7848 | } | |
7849 | ||
7850 | int read_attr_path(const char *p, unsigned *ret) { | |
7851 | _cleanup_close_ int fd = -1; | |
7852 | ||
7853 | assert(p); | |
7854 | assert(ret); | |
7855 | ||
7856 | fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW); | |
7857 | if (fd < 0) | |
7858 | return -errno; | |
7859 | ||
7860 | return read_attr_fd(fd, ret); | |
7861 | } | |
30535c16 LP |
7862 | |
7863 | int make_lock_file(const char *p, int operation, LockFile *ret) { | |
7864 | _cleanup_close_ int fd = -1; | |
7865 | _cleanup_free_ char *t = NULL; | |
7866 | int r; | |
7867 | ||
7868 | /* | |
7869 | * We use UNPOSIX locks if they are available. They have nice | |
7870 | * semantics, and are mostly compatible with NFS. However, | |
7871 | * they are only available on new kernels. When we detect we | |
7872 | * are running on an older kernel, then we fall back to good | |
7873 | * old BSD locks. They also have nice semantics, but are | |
7874 | * slightly problematic on NFS, where they are upgraded to | |
7875 | * POSIX locks, even though locally they are orthogonal to | |
7876 | * POSIX locks. | |
7877 | */ | |
7878 | ||
7879 | t = strdup(p); | |
7880 | if (!t) | |
7881 | return -ENOMEM; | |
7882 | ||
7883 | for (;;) { | |
7884 | struct flock fl = { | |
7885 | .l_type = (operation & ~LOCK_NB) == LOCK_EX ? F_WRLCK : F_RDLCK, | |
7886 | .l_whence = SEEK_SET, | |
7887 | }; | |
7888 | struct stat st; | |
7889 | ||
7890 | fd = open(p, O_CREAT|O_RDWR|O_NOFOLLOW|O_CLOEXEC|O_NOCTTY, 0600); | |
7891 | if (fd < 0) | |
7892 | return -errno; | |
7893 | ||
7894 | r = fcntl(fd, (operation & LOCK_NB) ? F_OFD_SETLK : F_OFD_SETLKW, &fl); | |
7895 | if (r < 0) { | |
7896 | ||
7897 | /* If the kernel is too old, use good old BSD locks */ | |
7898 | if (errno == EINVAL) | |
7899 | r = flock(fd, operation); | |
7900 | ||
7901 | if (r < 0) | |
7902 | return errno == EAGAIN ? -EBUSY : -errno; | |
7903 | } | |
7904 | ||
7905 | /* If we acquired the lock, let's check if the file | |
7906 | * still exists in the file system. If not, then the | |
7907 | * previous exclusive owner removed it and then closed | |
7908 | * it. In such a case our acquired lock is worthless, | |
7909 | * hence try again. */ | |
7910 | ||
7911 | r = fstat(fd, &st); | |
7912 | if (r < 0) | |
7913 | return -errno; | |
7914 | if (st.st_nlink > 0) | |
7915 | break; | |
7916 | ||
7917 | fd = safe_close(fd); | |
7918 | } | |
7919 | ||
7920 | ret->path = t; | |
7921 | ret->fd = fd; | |
7922 | ret->operation = operation; | |
7923 | ||
7924 | fd = -1; | |
7925 | t = NULL; | |
7926 | ||
7927 | return r; | |
7928 | } | |
7929 | ||
7930 | int make_lock_file_for(const char *p, int operation, LockFile *ret) { | |
7931 | const char *fn; | |
7932 | char *t; | |
7933 | ||
7934 | assert(p); | |
7935 | assert(ret); | |
7936 | ||
7937 | fn = basename(p); | |
7938 | if (!filename_is_valid(fn)) | |
7939 | return -EINVAL; | |
7940 | ||
7941 | t = newa(char, strlen(p) + 2 + 4 + 1); | |
7942 | stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), fn), ".lck"); | |
7943 | ||
7944 | return make_lock_file(t, operation, ret); | |
7945 | } | |
7946 | ||
7947 | void release_lock_file(LockFile *f) { | |
7948 | int r; | |
7949 | ||
7950 | if (!f) | |
7951 | return; | |
7952 | ||
7953 | if (f->path) { | |
7954 | ||
7955 | /* If we are the exclusive owner we can safely delete | |
7956 | * the lock file itself. If we are not the exclusive | |
7957 | * owner, we can try becoming it. */ | |
7958 | ||
7959 | if (f->fd >= 0 && | |
7960 | (f->operation & ~LOCK_NB) == LOCK_SH) { | |
7961 | static const struct flock fl = { | |
7962 | .l_type = F_WRLCK, | |
7963 | .l_whence = SEEK_SET, | |
7964 | }; | |
7965 | ||
7966 | r = fcntl(f->fd, F_OFD_SETLK, &fl); | |
7967 | if (r < 0 && errno == EINVAL) | |
7968 | r = flock(f->fd, LOCK_EX|LOCK_NB); | |
7969 | ||
7970 | if (r >= 0) | |
7971 | f->operation = LOCK_EX|LOCK_NB; | |
7972 | } | |
7973 | ||
7974 | if ((f->operation & ~LOCK_NB) == LOCK_EX) | |
7975 | unlink_noerrno(f->path); | |
7976 | ||
7977 | free(f->path); | |
7978 | f->path = NULL; | |
7979 | } | |
7980 | ||
7981 | f->fd = safe_close(f->fd); | |
7982 | f->operation = 0; | |
7983 | } | |
ff6a7460 LP |
7984 | |
7985 | static size_t nul_length(const uint8_t *p, size_t sz) { | |
7986 | size_t n = 0; | |
7987 | ||
7988 | while (sz > 0) { | |
7989 | if (*p != 0) | |
7990 | break; | |
7991 | ||
7992 | n++; | |
7993 | p++; | |
7994 | sz--; | |
7995 | } | |
7996 | ||
7997 | return n; | |
7998 | } | |
7999 | ||
8000 | ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length) { | |
8001 | const uint8_t *q, *w, *e; | |
8002 | ssize_t l; | |
8003 | ||
8004 | q = w = p; | |
8005 | e = q + sz; | |
8006 | while (q < e) { | |
8007 | size_t n; | |
8008 | ||
8009 | n = nul_length(q, e - q); | |
8010 | ||
8011 | /* If there are more than the specified run length of | |
8012 | * NUL bytes, or if this is the beginning or the end | |
8013 | * of the buffer, then seek instead of write */ | |
8014 | if ((n > run_length) || | |
8015 | (n > 0 && q == p) || | |
8016 | (n > 0 && q + n >= e)) { | |
8017 | if (q > w) { | |
8018 | l = write(fd, w, q - w); | |
8019 | if (l < 0) | |
8020 | return -errno; | |
8021 | if (l != q -w) | |
8022 | return -EIO; | |
8023 | } | |
8024 | ||
8025 | if (lseek(fd, n, SEEK_CUR) == (off_t) -1) | |
8026 | return -errno; | |
8027 | ||
8028 | q += n; | |
8029 | w = q; | |
8030 | } else if (n > 0) | |
8031 | q += n; | |
8032 | else | |
8033 | q ++; | |
8034 | } | |
8035 | ||
8036 | if (q > w) { | |
8037 | l = write(fd, w, q - w); | |
8038 | if (l < 0) | |
8039 | return -errno; | |
8040 | if (l != q - w) | |
8041 | return -EIO; | |
8042 | } | |
8043 | ||
8044 | return q - (const uint8_t*) p; | |
8045 | } | |
3576d631 LP |
8046 | |
8047 | void sigkill_wait(pid_t *pid) { | |
8048 | if (!pid) | |
8049 | return; | |
8050 | if (*pid <= 1) | |
8051 | return; | |
8052 | ||
8053 | if (kill(*pid, SIGKILL) > 0) | |
8054 | (void) wait_for_terminate(*pid, NULL); | |
8055 | } | |
3d7415f4 LP |
8056 | |
8057 | int syslog_parse_priority(const char **p, int *priority, bool with_facility) { | |
8058 | int a = 0, b = 0, c = 0; | |
8059 | int k; | |
8060 | ||
8061 | assert(p); | |
8062 | assert(*p); | |
8063 | assert(priority); | |
8064 | ||
8065 | if ((*p)[0] != '<') | |
8066 | return 0; | |
8067 | ||
8068 | if (!strchr(*p, '>')) | |
8069 | return 0; | |
8070 | ||
8071 | if ((*p)[2] == '>') { | |
8072 | c = undecchar((*p)[1]); | |
8073 | k = 3; | |
8074 | } else if ((*p)[3] == '>') { | |
8075 | b = undecchar((*p)[1]); | |
8076 | c = undecchar((*p)[2]); | |
8077 | k = 4; | |
8078 | } else if ((*p)[4] == '>') { | |
8079 | a = undecchar((*p)[1]); | |
8080 | b = undecchar((*p)[2]); | |
8081 | c = undecchar((*p)[3]); | |
8082 | k = 5; | |
8083 | } else | |
8084 | return 0; | |
8085 | ||
8086 | if (a < 0 || b < 0 || c < 0 || | |
8087 | (!with_facility && (a || b || c > 7))) | |
8088 | return 0; | |
8089 | ||
8090 | if (with_facility) | |
8091 | *priority = a*100 + b*10 + c; | |
8092 | else | |
8093 | *priority = (*priority & LOG_FACMASK) | c; | |
8094 | ||
8095 | *p += k; | |
8096 | return 1; | |
8097 | } | |
9cad100e BB |
8098 | |
8099 | ssize_t string_table_lookup(const char * const *table, size_t len, const char *key) { | |
8100 | size_t i; | |
8101 | ||
8102 | if (!key) | |
8103 | return -1; | |
8104 | ||
8105 | for (i = 0; i < len; ++i) | |
8106 | if (streq_ptr(table[i], key)) | |
8107 | return (ssize_t)i; | |
8108 | ||
8109 | return -1; | |
8110 | } | |
1c8da044 LP |
8111 | |
8112 | void cmsg_close_all(struct msghdr *mh) { | |
8113 | struct cmsghdr *cmsg; | |
8114 | ||
8115 | assert(mh); | |
8116 | ||
8117 | for (cmsg = CMSG_FIRSTHDR(mh); cmsg; cmsg = CMSG_NXTHDR(mh, cmsg)) | |
8118 | if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) | |
8119 | close_many((int*) CMSG_DATA(cmsg), (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int)); | |
8120 | } |