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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 | 27 | #include <libintl.h> |
034c6ed7 | 28 | #include <stdio.h> |
1dccbe19 LP |
29 | #include <syslog.h> |
30 | #include <sched.h> | |
31 | #include <sys/resource.h> | |
ef886c6a | 32 | #include <linux/sched.h> |
a9f5d454 LP |
33 | #include <sys/types.h> |
34 | #include <sys/stat.h> | |
3a0ecb08 | 35 | #include <fcntl.h> |
a0d40ac5 | 36 | #include <dirent.h> |
601f6a1e | 37 | #include <sys/ioctl.h> |
80876c20 | 38 | #include <stdarg.h> |
0a6f50c0 | 39 | #include <poll.h> |
3177a7fa | 40 | #include <ctype.h> |
5b6319dc | 41 | #include <sys/prctl.h> |
ef2f1067 LP |
42 | #include <sys/utsname.h> |
43 | #include <pwd.h> | |
4fd5948e | 44 | #include <netinet/ip.h> |
2e78aa99 | 45 | #include <sys/wait.h> |
7948c4df | 46 | #include <sys/time.h> |
8092a428 | 47 | #include <glob.h> |
4b67834e | 48 | #include <grp.h> |
87d2c1ff | 49 | #include <sys/mman.h> |
825c6fe5 | 50 | #include <sys/vfs.h> |
6d313367 | 51 | #include <sys/mount.h> |
825c6fe5 | 52 | #include <linux/magic.h> |
0b507b17 | 53 | #include <limits.h> |
09017585 MS |
54 | #include <langinfo.h> |
55 | #include <locale.h> | |
6afc95b7 | 56 | #include <sys/personality.h> |
4a4d89b6 | 57 | #include <sys/xattr.h> |
abe4aa14 | 58 | #include <sys/statvfs.h> |
30535c16 | 59 | #include <sys/file.h> |
11689d2a | 60 | #include <linux/fs.h> |
eef46c37 LP |
61 | |
62 | /* When we include libgen.h because we need dirname() we immediately | |
63 | * undefine basename() since libgen.h defines it as a macro to the XDG | |
64 | * version which is really broken. */ | |
65 | #include <libgen.h> | |
2b6bf07d | 66 | #undef basename |
60918275 | 67 | |
9bf3b535 LP |
68 | #ifdef HAVE_SYS_AUXV_H |
69 | #include <sys/auxv.h> | |
70 | #endif | |
71 | ||
20f56fdd | 72 | #include "config.h" |
60918275 LP |
73 | #include "macro.h" |
74 | #include "util.h" | |
1dccbe19 LP |
75 | #include "ioprio.h" |
76 | #include "missing.h" | |
a9f5d454 | 77 | #include "log.h" |
65d2ebdc | 78 | #include "strv.h" |
c38dfac9 | 79 | #include "mkdir.h" |
9eb977db | 80 | #include "path-util.h" |
d06dacd0 | 81 | #include "exit-status.h" |
83cc030f | 82 | #include "hashmap.h" |
4d1a6904 | 83 | #include "env-util.h" |
a5c32cff | 84 | #include "fileio.h" |
8f6ce71f | 85 | #include "device-nodes.h" |
f405e86d SL |
86 | #include "utf8.h" |
87 | #include "gunicode.h" | |
295edddf | 88 | #include "virt.h" |
477def80 | 89 | #include "def.h" |
4a4d89b6 | 90 | #include "sparse-endian.h" |
6482f626 | 91 | #include "formats-util.h" |
0b452006 | 92 | #include "process-util.h" |
3df3e884 | 93 | #include "random-util.h" |
288a74cc | 94 | #include "terminal-util.h" |
958b66ea | 95 | #include "hostname-util.h" |
56cf987f | 96 | |
012d7b42 ZJS |
97 | /* Put this test here for a lack of better place */ |
98 | assert_cc(EAGAIN == EWOULDBLOCK); | |
99 | ||
9a0e6896 LP |
100 | int saved_argc = 0; |
101 | char **saved_argv = NULL; | |
9086e840 | 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 | ||
d3226d77 ZJS |
151 | char* endswith_no_case(const char *s, const char *postfix) { |
152 | size_t sl, pl; | |
153 | ||
154 | assert(s); | |
155 | assert(postfix); | |
156 | ||
157 | sl = strlen(s); | |
158 | pl = strlen(postfix); | |
159 | ||
160 | if (pl == 0) | |
161 | return (char*) s + sl; | |
162 | ||
163 | if (sl < pl) | |
164 | return NULL; | |
165 | ||
166 | if (strcasecmp(s + sl - pl, postfix) != 0) | |
167 | return NULL; | |
168 | ||
169 | return (char*) s + sl - pl; | |
170 | } | |
171 | ||
5cb36f41 | 172 | char* first_word(const char *s, const char *word) { |
79d6d816 | 173 | size_t sl, wl; |
5cb36f41 | 174 | const char *p; |
79d6d816 LP |
175 | |
176 | assert(s); | |
177 | assert(word); | |
178 | ||
5cb36f41 LP |
179 | /* Checks if the string starts with the specified word, either |
180 | * followed by NUL or by whitespace. Returns a pointer to the | |
181 | * NUL or the first character after the whitespace. */ | |
182 | ||
79d6d816 LP |
183 | sl = strlen(s); |
184 | wl = strlen(word); | |
185 | ||
186 | if (sl < wl) | |
5cb36f41 | 187 | return NULL; |
79d6d816 | 188 | |
d4d0d4db | 189 | if (wl == 0) |
5cb36f41 | 190 | return (char*) s; |
d4d0d4db | 191 | |
79d6d816 | 192 | if (memcmp(s, word, wl) != 0) |
5cb36f41 LP |
193 | return NULL; |
194 | ||
195 | p = s + wl; | |
196 | if (*p == 0) | |
197 | return (char*) p; | |
198 | ||
199 | if (!strchr(WHITESPACE, *p)) | |
200 | return NULL; | |
79d6d816 | 201 | |
5cb36f41 LP |
202 | p += strspn(p, WHITESPACE); |
203 | return (char*) p; | |
79d6d816 LP |
204 | } |
205 | ||
0b452006 | 206 | size_t cescape_char(char c, char *buf) { |
c593bb36 JF |
207 | char * buf_old = buf; |
208 | ||
209 | switch (c) { | |
210 | ||
211 | case '\a': | |
212 | *(buf++) = '\\'; | |
213 | *(buf++) = 'a'; | |
214 | break; | |
215 | case '\b': | |
216 | *(buf++) = '\\'; | |
217 | *(buf++) = 'b'; | |
218 | break; | |
219 | case '\f': | |
220 | *(buf++) = '\\'; | |
221 | *(buf++) = 'f'; | |
222 | break; | |
223 | case '\n': | |
224 | *(buf++) = '\\'; | |
225 | *(buf++) = 'n'; | |
226 | break; | |
227 | case '\r': | |
228 | *(buf++) = '\\'; | |
229 | *(buf++) = 'r'; | |
230 | break; | |
231 | case '\t': | |
232 | *(buf++) = '\\'; | |
233 | *(buf++) = 't'; | |
234 | break; | |
235 | case '\v': | |
236 | *(buf++) = '\\'; | |
237 | *(buf++) = 'v'; | |
238 | break; | |
239 | case '\\': | |
240 | *(buf++) = '\\'; | |
241 | *(buf++) = '\\'; | |
242 | break; | |
243 | case '"': | |
244 | *(buf++) = '\\'; | |
245 | *(buf++) = '"'; | |
246 | break; | |
247 | case '\'': | |
248 | *(buf++) = '\\'; | |
249 | *(buf++) = '\''; | |
250 | break; | |
251 | ||
252 | default: | |
253 | /* For special chars we prefer octal over | |
254 | * hexadecimal encoding, simply because glib's | |
255 | * g_strescape() does the same */ | |
256 | if ((c < ' ') || (c >= 127)) { | |
257 | *(buf++) = '\\'; | |
258 | *(buf++) = octchar((unsigned char) c >> 6); | |
259 | *(buf++) = octchar((unsigned char) c >> 3); | |
260 | *(buf++) = octchar((unsigned char) c); | |
261 | } else | |
262 | *(buf++) = c; | |
263 | break; | |
264 | } | |
265 | ||
266 | return buf - buf_old; | |
267 | } | |
268 | ||
42f4e3c4 | 269 | int close_nointr(int fd) { |
b0ee8068 | 270 | assert(fd >= 0); |
a9f85faf LP |
271 | |
272 | if (close(fd) >= 0) | |
273 | return 0; | |
274 | ||
275 | /* | |
276 | * Just ignore EINTR; a retry loop is the wrong thing to do on | |
277 | * Linux. | |
278 | * | |
279 | * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html | |
280 | * https://bugzilla.gnome.org/show_bug.cgi?id=682819 | |
281 | * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR | |
282 | * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain | |
283 | */ | |
284 | if (errno == EINTR) | |
d96ea504 | 285 | return 0; |
a9f85faf LP |
286 | |
287 | return -errno; | |
60918275 | 288 | } |
85261803 | 289 | |
03e334a1 LP |
290 | int safe_close(int fd) { |
291 | ||
292 | /* | |
293 | * Like close_nointr() but cannot fail. Guarantees errno is | |
294 | * unchanged. Is a NOP with negative fds passed, and returns | |
295 | * -1, so that it can be used in this syntax: | |
296 | * | |
297 | * fd = safe_close(fd); | |
298 | */ | |
85f136b5 | 299 | |
03e334a1 LP |
300 | if (fd >= 0) { |
301 | PROTECT_ERRNO; | |
d96ea504 LP |
302 | |
303 | /* The kernel might return pretty much any error code | |
304 | * via close(), but the fd will be closed anyway. The | |
305 | * only condition we want to check for here is whether | |
306 | * the fd was invalid at all... */ | |
307 | ||
308 | assert_se(close_nointr(fd) != -EBADF); | |
03e334a1 | 309 | } |
85f136b5 | 310 | |
03e334a1 | 311 | return -1; |
85f136b5 LP |
312 | } |
313 | ||
5b6319dc LP |
314 | void close_many(const int fds[], unsigned n_fd) { |
315 | unsigned i; | |
316 | ||
2c93b4ef LP |
317 | assert(fds || n_fd <= 0); |
318 | ||
5b6319dc | 319 | for (i = 0; i < n_fd; i++) |
03e334a1 | 320 | safe_close(fds[i]); |
5b6319dc LP |
321 | } |
322 | ||
4b73a0c0 LP |
323 | int unlink_noerrno(const char *path) { |
324 | PROTECT_ERRNO; | |
325 | int r; | |
326 | ||
327 | r = unlink(path); | |
328 | if (r < 0) | |
329 | return -errno; | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
85261803 LP |
334 | int parse_boolean(const char *v) { |
335 | assert(v); | |
336 | ||
0f625d0b | 337 | if (streq(v, "1") || strcaseeq(v, "yes") || strcaseeq(v, "y") || strcaseeq(v, "true") || strcaseeq(v, "t") || strcaseeq(v, "on")) |
85261803 | 338 | return 1; |
0f625d0b | 339 | else if (streq(v, "0") || strcaseeq(v, "no") || strcaseeq(v, "n") || strcaseeq(v, "false") || strcaseeq(v, "f") || strcaseeq(v, "off")) |
85261803 LP |
340 | return 0; |
341 | ||
342 | return -EINVAL; | |
343 | } | |
344 | ||
3ba686c1 | 345 | int parse_pid(const char *s, pid_t* ret_pid) { |
0b172489 | 346 | unsigned long ul = 0; |
3ba686c1 LP |
347 | pid_t pid; |
348 | int r; | |
349 | ||
350 | assert(s); | |
351 | assert(ret_pid); | |
352 | ||
e67f47e5 LP |
353 | r = safe_atolu(s, &ul); |
354 | if (r < 0) | |
3ba686c1 LP |
355 | return r; |
356 | ||
357 | pid = (pid_t) ul; | |
358 | ||
359 | if ((unsigned long) pid != ul) | |
360 | return -ERANGE; | |
361 | ||
362 | if (pid <= 0) | |
363 | return -ERANGE; | |
364 | ||
365 | *ret_pid = pid; | |
366 | return 0; | |
367 | } | |
368 | ||
034a2a52 LP |
369 | int parse_uid(const char *s, uid_t* ret_uid) { |
370 | unsigned long ul = 0; | |
371 | uid_t uid; | |
372 | int r; | |
373 | ||
374 | assert(s); | |
034a2a52 | 375 | |
e67f47e5 LP |
376 | r = safe_atolu(s, &ul); |
377 | if (r < 0) | |
034a2a52 LP |
378 | return r; |
379 | ||
380 | uid = (uid_t) ul; | |
381 | ||
382 | if ((unsigned long) uid != ul) | |
383 | return -ERANGE; | |
384 | ||
fed1e721 | 385 | /* Some libc APIs use UID_INVALID as special placeholder */ |
306a55c8 | 386 | if (uid == (uid_t) 0xFFFFFFFF) |
f841a154 | 387 | return -ENXIO; |
306a55c8 | 388 | |
6afeb1cf | 389 | /* A long time ago UIDs where 16bit, hence explicitly avoid the 16bit -1 too */ |
306a55c8 | 390 | if (uid == (uid_t) 0xFFFF) |
f841a154 | 391 | return -ENXIO; |
306a55c8 | 392 | |
8b0849e9 LP |
393 | if (ret_uid) |
394 | *ret_uid = uid; | |
395 | ||
034a2a52 LP |
396 | return 0; |
397 | } | |
398 | ||
85261803 LP |
399 | int safe_atou(const char *s, unsigned *ret_u) { |
400 | char *x = NULL; | |
034c6ed7 | 401 | unsigned long l; |
85261803 LP |
402 | |
403 | assert(s); | |
404 | assert(ret_u); | |
405 | ||
406 | errno = 0; | |
407 | l = strtoul(s, &x, 0); | |
408 | ||
f3910003 | 409 | if (!x || x == s || *x || errno) |
48deb058 | 410 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 411 | |
034c6ed7 | 412 | if ((unsigned long) (unsigned) l != l) |
85261803 LP |
413 | return -ERANGE; |
414 | ||
415 | *ret_u = (unsigned) l; | |
416 | return 0; | |
417 | } | |
418 | ||
419 | int safe_atoi(const char *s, int *ret_i) { | |
420 | char *x = NULL; | |
034c6ed7 | 421 | long l; |
85261803 LP |
422 | |
423 | assert(s); | |
424 | assert(ret_i); | |
425 | ||
426 | errno = 0; | |
427 | l = strtol(s, &x, 0); | |
428 | ||
f3910003 | 429 | if (!x || x == s || *x || errno) |
48deb058 | 430 | return errno > 0 ? -errno : -EINVAL; |
85261803 | 431 | |
034c6ed7 | 432 | if ((long) (int) l != l) |
85261803 LP |
433 | return -ERANGE; |
434 | ||
034c6ed7 LP |
435 | *ret_i = (int) l; |
436 | return 0; | |
437 | } | |
438 | ||
b914e211 LP |
439 | int safe_atou8(const char *s, uint8_t *ret) { |
440 | char *x = NULL; | |
441 | unsigned long l; | |
442 | ||
443 | assert(s); | |
444 | assert(ret); | |
445 | ||
446 | errno = 0; | |
447 | l = strtoul(s, &x, 0); | |
448 | ||
449 | if (!x || x == s || *x || errno) | |
450 | return errno > 0 ? -errno : -EINVAL; | |
451 | ||
452 | if ((unsigned long) (uint8_t) l != l) | |
453 | return -ERANGE; | |
454 | ||
455 | *ret = (uint8_t) l; | |
456 | return 0; | |
457 | } | |
458 | ||
781fa938 LP |
459 | int safe_atou16(const char *s, uint16_t *ret) { |
460 | char *x = NULL; | |
461 | unsigned long l; | |
462 | ||
463 | assert(s); | |
464 | assert(ret); | |
465 | ||
466 | errno = 0; | |
467 | l = strtoul(s, &x, 0); | |
468 | ||
469 | if (!x || x == s || *x || errno) | |
470 | return errno > 0 ? -errno : -EINVAL; | |
471 | ||
472 | if ((unsigned long) (uint16_t) l != l) | |
473 | return -ERANGE; | |
474 | ||
475 | *ret = (uint16_t) l; | |
476 | return 0; | |
477 | } | |
478 | ||
479 | int safe_atoi16(const char *s, int16_t *ret) { | |
480 | char *x = NULL; | |
481 | long l; | |
482 | ||
483 | assert(s); | |
484 | assert(ret); | |
485 | ||
486 | errno = 0; | |
487 | l = strtol(s, &x, 0); | |
488 | ||
489 | if (!x || x == s || *x || errno) | |
490 | return errno > 0 ? -errno : -EINVAL; | |
491 | ||
492 | if ((long) (int16_t) l != l) | |
493 | return -ERANGE; | |
494 | ||
495 | *ret = (int16_t) l; | |
496 | return 0; | |
497 | } | |
498 | ||
034c6ed7 LP |
499 | int safe_atollu(const char *s, long long unsigned *ret_llu) { |
500 | char *x = NULL; | |
501 | unsigned long long l; | |
502 | ||
503 | assert(s); | |
504 | assert(ret_llu); | |
505 | ||
506 | errno = 0; | |
507 | l = strtoull(s, &x, 0); | |
508 | ||
f3910003 | 509 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
510 | return errno ? -errno : -EINVAL; |
511 | ||
512 | *ret_llu = l; | |
513 | return 0; | |
514 | } | |
515 | ||
516 | int safe_atolli(const char *s, long long int *ret_lli) { | |
517 | char *x = NULL; | |
518 | long long l; | |
519 | ||
520 | assert(s); | |
521 | assert(ret_lli); | |
522 | ||
523 | errno = 0; | |
524 | l = strtoll(s, &x, 0); | |
525 | ||
f3910003 | 526 | if (!x || x == s || *x || errno) |
034c6ed7 LP |
527 | return errno ? -errno : -EINVAL; |
528 | ||
529 | *ret_lli = l; | |
85261803 LP |
530 | return 0; |
531 | } | |
a41e8209 | 532 | |
f7900e25 TA |
533 | int safe_atod(const char *s, double *ret_d) { |
534 | char *x = NULL; | |
32b2634e | 535 | double d = 0; |
0193ad26 | 536 | locale_t loc; |
f7900e25 TA |
537 | |
538 | assert(s); | |
539 | assert(ret_d); | |
540 | ||
0193ad26 CR |
541 | loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0); |
542 | if (loc == (locale_t) 0) | |
543 | return -errno; | |
f7900e25 | 544 | |
0193ad26 CR |
545 | errno = 0; |
546 | d = strtod_l(s, &x, loc); | |
547 | ||
548 | if (!x || x == s || *x || errno) { | |
549 | freelocale(loc); | |
f7900e25 | 550 | return errno ? -errno : -EINVAL; |
0193ad26 | 551 | } |
f7900e25 | 552 | |
0193ad26 | 553 | freelocale(loc); |
f7900e25 TA |
554 | *ret_d = (double) d; |
555 | return 0; | |
556 | } | |
557 | ||
bf85c24d SP |
558 | static size_t strcspn_escaped(const char *s, const char *reject) { |
559 | bool escaped = false; | |
ba774317 | 560 | int n; |
bf85c24d SP |
561 | |
562 | for (n=0; s[n]; n++) { | |
563 | if (escaped) | |
564 | escaped = false; | |
565 | else if (s[n] == '\\') | |
566 | escaped = true; | |
567 | else if (strchr(reject, s[n])) | |
a2a5291b | 568 | break; |
bf85c24d | 569 | } |
ba774317 | 570 | |
a2a5291b ZJS |
571 | /* if s ends in \, return index of previous char */ |
572 | return n - escaped; | |
bf85c24d SP |
573 | } |
574 | ||
a41e8209 | 575 | /* Split a string into words. */ |
a2a5291b ZJS |
576 | const char* split(const char **state, size_t *l, const char *separator, bool quoted) { |
577 | const char *current; | |
a41e8209 | 578 | |
a2a5291b | 579 | current = *state; |
a41e8209 | 580 | |
a2a5291b ZJS |
581 | if (!*current) { |
582 | assert(**state == '\0'); | |
a41e8209 | 583 | return NULL; |
a2a5291b | 584 | } |
a41e8209 | 585 | |
65d2ebdc | 586 | current += strspn(current, separator); |
a2a5291b ZJS |
587 | if (!*current) { |
588 | *state = current; | |
70f75a52 | 589 | return NULL; |
a2a5291b | 590 | } |
70f75a52 | 591 | |
bf85c24d | 592 | if (quoted && strchr("\'\"", *current)) { |
a2a5291b ZJS |
593 | char quotechars[2] = {*current, '\0'}; |
594 | ||
595 | *l = strcspn_escaped(current + 1, quotechars); | |
470dca63 | 596 | if (current[*l + 1] == '\0' || current[*l + 1] != quotechars[0] || |
a2a5291b | 597 | (current[*l + 2] && !strchr(separator, current[*l + 2]))) { |
cc13b327 | 598 | /* right quote missing or garbage at the end */ |
a2a5291b ZJS |
599 | *state = current; |
600 | return NULL; | |
601 | } | |
a2a5291b | 602 | *state = current++ + *l + 2; |
bf85c24d SP |
603 | } else if (quoted) { |
604 | *l = strcspn_escaped(current, separator); | |
ba774317 ZJS |
605 | if (current[*l] && !strchr(separator, current[*l])) { |
606 | /* unfinished escape */ | |
607 | *state = current; | |
608 | return NULL; | |
609 | } | |
a2a5291b | 610 | *state = current + *l; |
034c6ed7 | 611 | } else { |
bf85c24d | 612 | *l = strcspn(current, separator); |
a2a5291b | 613 | *state = current + *l; |
034c6ed7 LP |
614 | } |
615 | ||
a2a5291b | 616 | return current; |
034c6ed7 LP |
617 | } |
618 | ||
34ca941c LP |
619 | int fchmod_umask(int fd, mode_t m) { |
620 | mode_t u; | |
621 | int r; | |
622 | ||
623 | u = umask(0777); | |
624 | r = fchmod(fd, m & (~u)) < 0 ? -errno : 0; | |
625 | umask(u); | |
626 | ||
627 | return r; | |
628 | } | |
629 | ||
7072ced8 LP |
630 | char *truncate_nl(char *s) { |
631 | assert(s); | |
632 | ||
633 | s[strcspn(s, NEWLINE)] = 0; | |
634 | return s; | |
635 | } | |
636 | ||
fab56fc5 LP |
637 | char *strnappend(const char *s, const char *suffix, size_t b) { |
638 | size_t a; | |
44d8db9e LP |
639 | char *r; |
640 | ||
fab56fc5 LP |
641 | if (!s && !suffix) |
642 | return strdup(""); | |
643 | ||
644 | if (!s) | |
645 | return strndup(suffix, b); | |
646 | ||
647 | if (!suffix) | |
648 | return strdup(s); | |
649 | ||
44d8db9e LP |
650 | assert(s); |
651 | assert(suffix); | |
652 | ||
653 | a = strlen(s); | |
aa408e77 | 654 | if (b > ((size_t) -1) - a) |
040f18ea | 655 | return NULL; |
44d8db9e | 656 | |
040f18ea LP |
657 | r = new(char, a+b+1); |
658 | if (!r) | |
44d8db9e LP |
659 | return NULL; |
660 | ||
661 | memcpy(r, s, a); | |
662 | memcpy(r+a, suffix, b); | |
663 | r[a+b] = 0; | |
664 | ||
665 | return r; | |
666 | } | |
87f0e418 | 667 | |
fab56fc5 LP |
668 | char *strappend(const char *s, const char *suffix) { |
669 | return strnappend(s, suffix, suffix ? strlen(suffix) : 0); | |
670 | } | |
671 | ||
849958d1 | 672 | int readlinkat_malloc(int fd, const char *p, char **ret) { |
87f0e418 | 673 | size_t l = 100; |
2d2ebd6b | 674 | int r; |
87f0e418 LP |
675 | |
676 | assert(p); | |
2d2ebd6b | 677 | assert(ret); |
87f0e418 LP |
678 | |
679 | for (;;) { | |
680 | char *c; | |
681 | ssize_t n; | |
682 | ||
2d2ebd6b LP |
683 | c = new(char, l); |
684 | if (!c) | |
87f0e418 LP |
685 | return -ENOMEM; |
686 | ||
849958d1 | 687 | n = readlinkat(fd, p, c, l-1); |
2d2ebd6b LP |
688 | if (n < 0) { |
689 | r = -errno; | |
87f0e418 | 690 | free(c); |
2d2ebd6b | 691 | return r; |
87f0e418 LP |
692 | } |
693 | ||
694 | if ((size_t) n < l-1) { | |
695 | c[n] = 0; | |
2d2ebd6b | 696 | *ret = c; |
87f0e418 LP |
697 | return 0; |
698 | } | |
699 | ||
700 | free(c); | |
701 | l *= 2; | |
702 | } | |
703 | } | |
704 | ||
849958d1 LP |
705 | int readlink_malloc(const char *p, char **ret) { |
706 | return readlinkat_malloc(AT_FDCWD, p, ret); | |
707 | } | |
708 | ||
9a67bcf2 TG |
709 | int readlink_value(const char *p, char **ret) { |
710 | _cleanup_free_ char *link = NULL; | |
711 | char *value; | |
712 | int r; | |
713 | ||
714 | r = readlink_malloc(p, &link); | |
715 | if (r < 0) | |
716 | return r; | |
717 | ||
718 | value = basename(link); | |
719 | if (!value) | |
720 | return -ENOENT; | |
721 | ||
722 | value = strdup(value); | |
723 | if (!value) | |
724 | return -ENOMEM; | |
725 | ||
726 | *ret = value; | |
727 | ||
728 | return 0; | |
729 | } | |
730 | ||
2c7108c4 | 731 | int readlink_and_make_absolute(const char *p, char **r) { |
1058cbf2 ZJS |
732 | _cleanup_free_ char *target = NULL; |
733 | char *k; | |
2c7108c4 LP |
734 | int j; |
735 | ||
736 | assert(p); | |
737 | assert(r); | |
738 | ||
1058cbf2 ZJS |
739 | j = readlink_malloc(p, &target); |
740 | if (j < 0) | |
2c7108c4 LP |
741 | return j; |
742 | ||
743 | k = file_in_same_dir(p, target); | |
2c7108c4 LP |
744 | if (!k) |
745 | return -ENOMEM; | |
746 | ||
747 | *r = k; | |
748 | return 0; | |
749 | } | |
750 | ||
83096483 LP |
751 | int readlink_and_canonicalize(const char *p, char **r) { |
752 | char *t, *s; | |
753 | int j; | |
754 | ||
755 | assert(p); | |
756 | assert(r); | |
757 | ||
758 | j = readlink_and_make_absolute(p, &t); | |
759 | if (j < 0) | |
760 | return j; | |
761 | ||
762 | s = canonicalize_file_name(t); | |
763 | if (s) { | |
764 | free(t); | |
765 | *r = s; | |
766 | } else | |
767 | *r = t; | |
768 | ||
769 | path_kill_slashes(*r); | |
770 | ||
771 | return 0; | |
772 | } | |
773 | ||
2a987ee8 | 774 | int reset_all_signal_handlers(void) { |
24a5d6b0 | 775 | int sig, r = 0; |
2a987ee8 LP |
776 | |
777 | for (sig = 1; sig < _NSIG; sig++) { | |
b92bea5d ZJS |
778 | struct sigaction sa = { |
779 | .sa_handler = SIG_DFL, | |
780 | .sa_flags = SA_RESTART, | |
781 | }; | |
2a987ee8 | 782 | |
24a5d6b0 | 783 | /* These two cannot be caught... */ |
2a987ee8 LP |
784 | if (sig == SIGKILL || sig == SIGSTOP) |
785 | continue; | |
786 | ||
2a987ee8 LP |
787 | /* On Linux the first two RT signals are reserved by |
788 | * glibc, and sigaction() will return EINVAL for them. */ | |
789 | if ((sigaction(sig, &sa, NULL) < 0)) | |
24a5d6b0 LP |
790 | if (errno != EINVAL && r == 0) |
791 | r = -errno; | |
2a987ee8 LP |
792 | } |
793 | ||
24a5d6b0 | 794 | return r; |
2a987ee8 | 795 | } |
4a72ff34 | 796 | |
1dedb74a LP |
797 | int reset_signal_mask(void) { |
798 | sigset_t ss; | |
799 | ||
800 | if (sigemptyset(&ss) < 0) | |
801 | return -errno; | |
802 | ||
803 | if (sigprocmask(SIG_SETMASK, &ss, NULL) < 0) | |
804 | return -errno; | |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
4a72ff34 | 809 | char *strstrip(char *s) { |
57a8eca8 | 810 | char *e; |
4a72ff34 LP |
811 | |
812 | /* Drops trailing whitespace. Modifies the string in | |
813 | * place. Returns pointer to first non-space character */ | |
814 | ||
815 | s += strspn(s, WHITESPACE); | |
816 | ||
57a8eca8 LP |
817 | for (e = strchr(s, 0); e > s; e --) |
818 | if (!strchr(WHITESPACE, e[-1])) | |
819 | break; | |
4a72ff34 | 820 | |
57a8eca8 | 821 | *e = 0; |
4a72ff34 LP |
822 | |
823 | return s; | |
4a72ff34 LP |
824 | } |
825 | ||
ee9b5e01 LP |
826 | char *delete_chars(char *s, const char *bad) { |
827 | char *f, *t; | |
828 | ||
829 | /* Drops all whitespace, regardless where in the string */ | |
830 | ||
831 | for (f = s, t = s; *f; f++) { | |
832 | if (strchr(bad, *f)) | |
833 | continue; | |
834 | ||
835 | *(t++) = *f; | |
836 | } | |
837 | ||
838 | *t = 0; | |
839 | ||
840 | return s; | |
841 | } | |
842 | ||
4a72ff34 | 843 | char *file_in_same_dir(const char *path, const char *filename) { |
ebd93cb6 | 844 | char *e, *ret; |
4a72ff34 LP |
845 | size_t k; |
846 | ||
847 | assert(path); | |
848 | assert(filename); | |
849 | ||
850 | /* This removes the last component of path and appends | |
851 | * filename, unless the latter is absolute anyway or the | |
852 | * former isn't */ | |
853 | ||
854 | if (path_is_absolute(filename)) | |
855 | return strdup(filename); | |
856 | ||
ebd93cb6 LP |
857 | e = strrchr(path, '/'); |
858 | if (!e) | |
4a72ff34 LP |
859 | return strdup(filename); |
860 | ||
861 | k = strlen(filename); | |
ebd93cb6 LP |
862 | ret = new(char, (e + 1 - path) + k + 1); |
863 | if (!ret) | |
4a72ff34 LP |
864 | return NULL; |
865 | ||
ebd93cb6 LP |
866 | memcpy(mempcpy(ret, path, e + 1 - path), filename, k + 1); |
867 | return ret; | |
4a72ff34 | 868 | } |
fb624d04 | 869 | |
c32dd69b LP |
870 | int rmdir_parents(const char *path, const char *stop) { |
871 | size_t l; | |
872 | int r = 0; | |
873 | ||
874 | assert(path); | |
875 | assert(stop); | |
876 | ||
877 | l = strlen(path); | |
878 | ||
879 | /* Skip trailing slashes */ | |
880 | while (l > 0 && path[l-1] == '/') | |
881 | l--; | |
882 | ||
883 | while (l > 0) { | |
884 | char *t; | |
885 | ||
886 | /* Skip last component */ | |
887 | while (l > 0 && path[l-1] != '/') | |
888 | l--; | |
889 | ||
890 | /* Skip trailing slashes */ | |
891 | while (l > 0 && path[l-1] == '/') | |
892 | l--; | |
893 | ||
894 | if (l <= 0) | |
895 | break; | |
896 | ||
897 | if (!(t = strndup(path, l))) | |
898 | return -ENOMEM; | |
899 | ||
900 | if (path_startswith(stop, t)) { | |
901 | free(t); | |
902 | return 0; | |
903 | } | |
904 | ||
905 | r = rmdir(t); | |
906 | free(t); | |
907 | ||
908 | if (r < 0) | |
909 | if (errno != ENOENT) | |
910 | return -errno; | |
911 | } | |
912 | ||
913 | return 0; | |
914 | } | |
915 | ||
fb624d04 LP |
916 | char hexchar(int x) { |
917 | static const char table[16] = "0123456789abcdef"; | |
918 | ||
919 | return table[x & 15]; | |
920 | } | |
4fe88d28 LP |
921 | |
922 | int unhexchar(char c) { | |
923 | ||
924 | if (c >= '0' && c <= '9') | |
925 | return c - '0'; | |
926 | ||
927 | if (c >= 'a' && c <= 'f') | |
ea430986 | 928 | return c - 'a' + 10; |
4fe88d28 LP |
929 | |
930 | if (c >= 'A' && c <= 'F') | |
ea430986 | 931 | return c - 'A' + 10; |
4fe88d28 | 932 | |
7e8185ef | 933 | return -EINVAL; |
4fe88d28 LP |
934 | } |
935 | ||
66e35261 LP |
936 | char *hexmem(const void *p, size_t l) { |
937 | char *r, *z; | |
938 | const uint8_t *x; | |
939 | ||
940 | z = r = malloc(l * 2 + 1); | |
941 | if (!r) | |
942 | return NULL; | |
943 | ||
944 | for (x = p; x < (const uint8_t*) p + l; x++) { | |
945 | *(z++) = hexchar(*x >> 4); | |
946 | *(z++) = hexchar(*x & 15); | |
947 | } | |
948 | ||
949 | *z = 0; | |
950 | return r; | |
951 | } | |
952 | ||
2181a7f5 LP |
953 | void *unhexmem(const char *p, size_t l) { |
954 | uint8_t *r, *z; | |
955 | const char *x; | |
956 | ||
957 | assert(p); | |
958 | ||
959 | z = r = malloc((l + 1) / 2 + 1); | |
960 | if (!r) | |
961 | return NULL; | |
962 | ||
963 | for (x = p; x < p + l; x += 2) { | |
964 | int a, b; | |
965 | ||
966 | a = unhexchar(x[0]); | |
967 | if (x+1 < p + l) | |
968 | b = unhexchar(x[1]); | |
969 | else | |
970 | b = 0; | |
971 | ||
972 | *(z++) = (uint8_t) a << 4 | (uint8_t) b; | |
973 | } | |
974 | ||
975 | *z = 0; | |
976 | return r; | |
977 | } | |
978 | ||
4fe88d28 LP |
979 | char octchar(int x) { |
980 | return '0' + (x & 7); | |
981 | } | |
982 | ||
983 | int unoctchar(char c) { | |
984 | ||
985 | if (c >= '0' && c <= '7') | |
986 | return c - '0'; | |
987 | ||
7e8185ef | 988 | return -EINVAL; |
4fe88d28 LP |
989 | } |
990 | ||
5af98f82 LP |
991 | char decchar(int x) { |
992 | return '0' + (x % 10); | |
993 | } | |
994 | ||
995 | int undecchar(char c) { | |
996 | ||
997 | if (c >= '0' && c <= '9') | |
998 | return c - '0'; | |
999 | ||
7e8185ef | 1000 | return -EINVAL; |
5af98f82 LP |
1001 | } |
1002 | ||
4fe88d28 LP |
1003 | char *cescape(const char *s) { |
1004 | char *r, *t; | |
1005 | const char *f; | |
1006 | ||
1007 | assert(s); | |
1008 | ||
96406c1a | 1009 | /* Does C style string escaping. May be reversed with |
019c7fba | 1010 | * cunescape(). */ |
4fe88d28 | 1011 | |
f8e2fb7b LP |
1012 | r = new(char, strlen(s)*4 + 1); |
1013 | if (!r) | |
4fe88d28 LP |
1014 | return NULL; |
1015 | ||
1016 | for (f = s, t = r; *f; f++) | |
c593bb36 | 1017 | t += cescape_char(*f, t); |
4fe88d28 LP |
1018 | |
1019 | *t = 0; | |
1020 | ||
1021 | return r; | |
1022 | } | |
1023 | ||
f3ee6297 | 1024 | static int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode) { |
4034a06d LP |
1025 | int r = 1; |
1026 | ||
1027 | assert(p); | |
1028 | assert(*p); | |
1029 | assert(ret); | |
1030 | ||
f3ee6297 LP |
1031 | /* Unescapes C style. Returns the unescaped character in ret, |
1032 | * unless we encountered a \u sequence in which case the full | |
1033 | * unicode character is returned in ret_unicode, instead. */ | |
1034 | ||
4034a06d LP |
1035 | if (length != (size_t) -1 && length < 1) |
1036 | return -EINVAL; | |
1037 | ||
1038 | switch (p[0]) { | |
1039 | ||
1040 | case 'a': | |
1041 | *ret = '\a'; | |
1042 | break; | |
1043 | case 'b': | |
1044 | *ret = '\b'; | |
1045 | break; | |
1046 | case 'f': | |
1047 | *ret = '\f'; | |
1048 | break; | |
1049 | case 'n': | |
1050 | *ret = '\n'; | |
1051 | break; | |
1052 | case 'r': | |
1053 | *ret = '\r'; | |
1054 | break; | |
1055 | case 't': | |
1056 | *ret = '\t'; | |
1057 | break; | |
1058 | case 'v': | |
1059 | *ret = '\v'; | |
1060 | break; | |
1061 | case '\\': | |
1062 | *ret = '\\'; | |
1063 | break; | |
1064 | case '"': | |
1065 | *ret = '"'; | |
1066 | break; | |
1067 | case '\'': | |
1068 | *ret = '\''; | |
1069 | break; | |
1070 | ||
1071 | case 's': | |
1072 | /* This is an extension of the XDG syntax files */ | |
1073 | *ret = ' '; | |
1074 | break; | |
1075 | ||
1076 | case 'x': { | |
1077 | /* hexadecimal encoding */ | |
1078 | int a, b; | |
1079 | ||
1080 | if (length != (size_t) -1 && length < 3) | |
1081 | return -EINVAL; | |
1082 | ||
1083 | a = unhexchar(p[1]); | |
1084 | if (a < 0) | |
1085 | return -EINVAL; | |
1086 | ||
1087 | b = unhexchar(p[2]); | |
1088 | if (b < 0) | |
1089 | return -EINVAL; | |
1090 | ||
f3ee6297 | 1091 | /* Don't allow NUL bytes */ |
4034a06d LP |
1092 | if (a == 0 && b == 0) |
1093 | return -EINVAL; | |
1094 | ||
f3ee6297 | 1095 | *ret = (char) ((a << 4U) | b); |
4034a06d LP |
1096 | r = 3; |
1097 | break; | |
1098 | } | |
1099 | ||
f3ee6297 LP |
1100 | case 'u': { |
1101 | /* C++11 style 16bit unicode */ | |
1102 | ||
1103 | int a[4]; | |
1104 | unsigned i; | |
1105 | uint32_t c; | |
1106 | ||
1107 | if (length != (size_t) -1 && length < 5) | |
1108 | return -EINVAL; | |
1109 | ||
1110 | for (i = 0; i < 4; i++) { | |
1111 | a[i] = unhexchar(p[1 + i]); | |
1112 | if (a[i] < 0) | |
1113 | return a[i]; | |
1114 | } | |
1115 | ||
1116 | c = ((uint32_t) a[0] << 12U) | ((uint32_t) a[1] << 8U) | ((uint32_t) a[2] << 4U) | (uint32_t) a[3]; | |
1117 | ||
1118 | /* Don't allow 0 chars */ | |
1119 | if (c == 0) | |
1120 | return -EINVAL; | |
1121 | ||
1122 | if (c < 128) | |
1123 | *ret = c; | |
1124 | else { | |
1125 | if (!ret_unicode) | |
1126 | return -EINVAL; | |
1127 | ||
1128 | *ret = 0; | |
1129 | *ret_unicode = c; | |
1130 | } | |
1131 | ||
1132 | r = 5; | |
1133 | break; | |
1134 | } | |
1135 | ||
1136 | case 'U': { | |
1137 | /* C++11 style 32bit unicode */ | |
1138 | ||
1139 | int a[8]; | |
1140 | unsigned i; | |
1141 | uint32_t c; | |
1142 | ||
1143 | if (length != (size_t) -1 && length < 9) | |
1144 | return -EINVAL; | |
1145 | ||
1146 | for (i = 0; i < 8; i++) { | |
1147 | a[i] = unhexchar(p[1 + i]); | |
1148 | if (a[i] < 0) | |
1149 | return a[i]; | |
1150 | } | |
1151 | ||
1152 | c = ((uint32_t) a[0] << 28U) | ((uint32_t) a[1] << 24U) | ((uint32_t) a[2] << 20U) | ((uint32_t) a[3] << 16U) | | |
1153 | ((uint32_t) a[4] << 12U) | ((uint32_t) a[5] << 8U) | ((uint32_t) a[6] << 4U) | (uint32_t) a[7]; | |
1154 | ||
1155 | /* Don't allow 0 chars */ | |
1156 | if (c == 0) | |
1157 | return -EINVAL; | |
1158 | ||
1159 | /* Don't allow invalid code points */ | |
1160 | if (!unichar_is_valid(c)) | |
1161 | return -EINVAL; | |
1162 | ||
1163 | if (c < 128) | |
1164 | *ret = c; | |
1165 | else { | |
1166 | if (!ret_unicode) | |
1167 | return -EINVAL; | |
1168 | ||
1169 | *ret = 0; | |
1170 | *ret_unicode = c; | |
1171 | } | |
1172 | ||
1173 | r = 9; | |
1174 | break; | |
1175 | } | |
1176 | ||
4034a06d LP |
1177 | case '0': |
1178 | case '1': | |
1179 | case '2': | |
1180 | case '3': | |
1181 | case '4': | |
1182 | case '5': | |
1183 | case '6': | |
1184 | case '7': { | |
1185 | /* octal encoding */ | |
f3ee6297 LP |
1186 | int a, b, c; |
1187 | uint32_t m; | |
4034a06d LP |
1188 | |
1189 | if (length != (size_t) -1 && length < 4) | |
1190 | return -EINVAL; | |
1191 | ||
1192 | a = unoctchar(p[0]); | |
1193 | if (a < 0) | |
1194 | return -EINVAL; | |
1195 | ||
1196 | b = unoctchar(p[1]); | |
1197 | if (b < 0) | |
1198 | return -EINVAL; | |
1199 | ||
1200 | c = unoctchar(p[2]); | |
1201 | if (c < 0) | |
1202 | return -EINVAL; | |
1203 | ||
1204 | /* don't allow NUL bytes */ | |
1205 | if (a == 0 && b == 0 && c == 0) | |
1206 | return -EINVAL; | |
1207 | ||
1208 | /* Don't allow bytes above 255 */ | |
f3ee6297 | 1209 | m = ((uint32_t) a << 6U) | ((uint32_t) b << 3U) | (uint32_t) c; |
4034a06d LP |
1210 | if (m > 255) |
1211 | return -EINVAL; | |
1212 | ||
f3ee6297 | 1213 | *ret = m; |
4034a06d LP |
1214 | r = 3; |
1215 | break; | |
1216 | } | |
1217 | ||
1218 | default: | |
1219 | return -EINVAL; | |
1220 | } | |
1221 | ||
1222 | return r; | |
1223 | } | |
1224 | ||
527b7a42 | 1225 | int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret) { |
4fe88d28 LP |
1226 | char *r, *t; |
1227 | const char *f; | |
5b4c61cd | 1228 | size_t pl; |
4fe88d28 LP |
1229 | |
1230 | assert(s); | |
527b7a42 | 1231 | assert(ret); |
4fe88d28 | 1232 | |
5b4c61cd LP |
1233 | /* Undoes C style string escaping, and optionally prefixes it. */ |
1234 | ||
1235 | pl = prefix ? strlen(prefix) : 0; | |
4fe88d28 | 1236 | |
5b4c61cd | 1237 | r = new(char, pl+length+1); |
7f110ff9 | 1238 | if (!r) |
527b7a42 | 1239 | return -ENOMEM; |
4fe88d28 | 1240 | |
5b4c61cd LP |
1241 | if (prefix) |
1242 | memcpy(r, prefix, pl); | |
1243 | ||
1244 | for (f = s, t = r + pl; f < s + length; f++) { | |
4034a06d | 1245 | size_t remaining; |
f3ee6297 LP |
1246 | uint32_t u; |
1247 | char c; | |
4034a06d LP |
1248 | int k; |
1249 | ||
1250 | remaining = s + length - f; | |
7f769619 | 1251 | assert(remaining > 0); |
4fe88d28 | 1252 | |
527b7a42 LP |
1253 | if (*f != '\\') { |
1254 | /* A literal literal, copy verbatim */ | |
4fe88d28 LP |
1255 | *(t++) = *f; |
1256 | continue; | |
1257 | } | |
1258 | ||
527b7a42 LP |
1259 | if (remaining == 1) { |
1260 | if (flags & UNESCAPE_RELAX) { | |
1261 | /* A trailing backslash, copy verbatim */ | |
1262 | *(t++) = *f; | |
1263 | continue; | |
1264 | } | |
1265 | ||
cd977dca | 1266 | free(r); |
527b7a42 LP |
1267 | return -EINVAL; |
1268 | } | |
1269 | ||
f3ee6297 | 1270 | k = cunescape_one(f + 1, remaining - 1, &c, &u); |
4034a06d | 1271 | if (k < 0) { |
527b7a42 LP |
1272 | if (flags & UNESCAPE_RELAX) { |
1273 | /* Invalid escape code, let's take it literal then */ | |
1274 | *(t++) = '\\'; | |
1275 | continue; | |
1276 | } | |
1277 | ||
cd977dca | 1278 | free(r); |
527b7a42 | 1279 | return k; |
4fe88d28 | 1280 | } |
4034a06d | 1281 | |
f3ee6297 LP |
1282 | if (c != 0) |
1283 | /* Non-Unicode? Let's encode this directly */ | |
1284 | *(t++) = c; | |
1285 | else | |
1286 | /* Unicode? Then let's encode this in UTF-8 */ | |
1287 | t += utf8_encode_unichar(t, u); | |
1288 | ||
4034a06d | 1289 | f += k; |
4fe88d28 LP |
1290 | } |
1291 | ||
4fe88d28 | 1292 | *t = 0; |
4fe88d28 | 1293 | |
527b7a42 LP |
1294 | *ret = r; |
1295 | return t - r; | |
5b4c61cd LP |
1296 | } |
1297 | ||
527b7a42 LP |
1298 | int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret) { |
1299 | return cunescape_length_with_prefix(s, length, NULL, flags, ret); | |
1300 | } | |
5b4c61cd | 1301 | |
527b7a42 LP |
1302 | int cunescape(const char *s, UnescapeFlags flags, char **ret) { |
1303 | return cunescape_length(s, strlen(s), flags, ret); | |
6febfd0d | 1304 | } |
4fe88d28 LP |
1305 | |
1306 | char *xescape(const char *s, const char *bad) { | |
1307 | char *r, *t; | |
1308 | const char *f; | |
1309 | ||
1310 | /* Escapes all chars in bad, in addition to \ and all special | |
1311 | * chars, in \xFF style escaping. May be reversed with | |
019c7fba | 1312 | * cunescape(). */ |
4fe88d28 | 1313 | |
08ace05b LP |
1314 | r = new(char, strlen(s) * 4 + 1); |
1315 | if (!r) | |
4fe88d28 LP |
1316 | return NULL; |
1317 | ||
1318 | for (f = s, t = r; *f; f++) { | |
1319 | ||
b866264a LP |
1320 | if ((*f < ' ') || (*f >= 127) || |
1321 | (*f == '\\') || strchr(bad, *f)) { | |
4fe88d28 LP |
1322 | *(t++) = '\\'; |
1323 | *(t++) = 'x'; | |
1324 | *(t++) = hexchar(*f >> 4); | |
1325 | *(t++) = hexchar(*f); | |
1326 | } else | |
1327 | *(t++) = *f; | |
1328 | } | |
1329 | ||
1330 | *t = 0; | |
1331 | ||
1332 | return r; | |
1333 | } | |
1334 | ||
67d51650 | 1335 | char *ascii_strlower(char *t) { |
4fe88d28 LP |
1336 | char *p; |
1337 | ||
67d51650 | 1338 | assert(t); |
4fe88d28 | 1339 | |
67d51650 | 1340 | for (p = t; *p; p++) |
4fe88d28 LP |
1341 | if (*p >= 'A' && *p <= 'Z') |
1342 | *p = *p - 'A' + 'a'; | |
1343 | ||
67d51650 | 1344 | return t; |
4fe88d28 | 1345 | } |
1dccbe19 | 1346 | |
a34bf9db | 1347 | _pure_ static bool hidden_file_allow_backup(const char *filename) { |
c85dc17b LP |
1348 | assert(filename); |
1349 | ||
1350 | return | |
1351 | filename[0] == '.' || | |
6c78be3c | 1352 | streq(filename, "lost+found") || |
e472d476 LP |
1353 | streq(filename, "aquota.user") || |
1354 | streq(filename, "aquota.group") || | |
c85dc17b LP |
1355 | endswith(filename, ".rpmnew") || |
1356 | endswith(filename, ".rpmsave") || | |
1357 | endswith(filename, ".rpmorig") || | |
1358 | endswith(filename, ".dpkg-old") || | |
1359 | endswith(filename, ".dpkg-new") || | |
0cdfd26e | 1360 | endswith(filename, ".dpkg-tmp") || |
c7088e49 MP |
1361 | endswith(filename, ".dpkg-dist") || |
1362 | endswith(filename, ".dpkg-bak") || | |
1363 | endswith(filename, ".dpkg-backup") || | |
1364 | endswith(filename, ".dpkg-remove") || | |
c85dc17b LP |
1365 | endswith(filename, ".swp"); |
1366 | } | |
1367 | ||
a34bf9db | 1368 | bool hidden_file(const char *filename) { |
a228a22f LP |
1369 | assert(filename); |
1370 | ||
1371 | if (endswith(filename, "~")) | |
93f1a063 | 1372 | return true; |
a228a22f | 1373 | |
a34bf9db | 1374 | return hidden_file_allow_backup(filename); |
a228a22f LP |
1375 | } |
1376 | ||
3a0ecb08 | 1377 | int fd_nonblock(int fd, bool nonblock) { |
be8f4e9e | 1378 | int flags, nflags; |
3a0ecb08 LP |
1379 | |
1380 | assert(fd >= 0); | |
1381 | ||
be8f4e9e LP |
1382 | flags = fcntl(fd, F_GETFL, 0); |
1383 | if (flags < 0) | |
3a0ecb08 LP |
1384 | return -errno; |
1385 | ||
1386 | if (nonblock) | |
be8f4e9e | 1387 | nflags = flags | O_NONBLOCK; |
3a0ecb08 | 1388 | else |
be8f4e9e LP |
1389 | nflags = flags & ~O_NONBLOCK; |
1390 | ||
1391 | if (nflags == flags) | |
1392 | return 0; | |
3a0ecb08 | 1393 | |
34b42c96 | 1394 | if (fcntl(fd, F_SETFL, nflags) < 0) |
3a0ecb08 LP |
1395 | return -errno; |
1396 | ||
1397 | return 0; | |
1398 | } | |
1399 | ||
1400 | int fd_cloexec(int fd, bool cloexec) { | |
be8f4e9e | 1401 | int flags, nflags; |
3a0ecb08 LP |
1402 | |
1403 | assert(fd >= 0); | |
1404 | ||
be8f4e9e LP |
1405 | flags = fcntl(fd, F_GETFD, 0); |
1406 | if (flags < 0) | |
3a0ecb08 LP |
1407 | return -errno; |
1408 | ||
1409 | if (cloexec) | |
be8f4e9e | 1410 | nflags = flags | FD_CLOEXEC; |
3a0ecb08 | 1411 | else |
be8f4e9e LP |
1412 | nflags = flags & ~FD_CLOEXEC; |
1413 | ||
1414 | if (nflags == flags) | |
1415 | return 0; | |
3a0ecb08 | 1416 | |
34b42c96 | 1417 | if (fcntl(fd, F_SETFD, nflags) < 0) |
3a0ecb08 LP |
1418 | return -errno; |
1419 | ||
1420 | return 0; | |
1421 | } | |
1422 | ||
44a6b1b6 | 1423 | _pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) { |
b19be9eb LP |
1424 | unsigned i; |
1425 | ||
1426 | assert(n_fdset == 0 || fdset); | |
1427 | ||
1428 | for (i = 0; i < n_fdset; i++) | |
1429 | if (fdset[i] == fd) | |
1430 | return true; | |
1431 | ||
1432 | return false; | |
1433 | } | |
1434 | ||
a0d40ac5 | 1435 | int close_all_fds(const int except[], unsigned n_except) { |
e1d75803 | 1436 | _cleanup_closedir_ DIR *d = NULL; |
a0d40ac5 LP |
1437 | struct dirent *de; |
1438 | int r = 0; | |
1439 | ||
b19be9eb LP |
1440 | assert(n_except == 0 || except); |
1441 | ||
1442 | d = opendir("/proc/self/fd"); | |
1443 | if (!d) { | |
1444 | int fd; | |
1445 | struct rlimit rl; | |
1446 | ||
1447 | /* When /proc isn't available (for example in chroots) | |
1448 | * the fallback is brute forcing through the fd | |
1449 | * table */ | |
1450 | ||
1451 | assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0); | |
1452 | for (fd = 3; fd < (int) rl.rlim_max; fd ++) { | |
1453 | ||
1454 | if (fd_in_set(fd, except, n_except)) | |
1455 | continue; | |
1456 | ||
1457 | if (close_nointr(fd) < 0) | |
1458 | if (errno != EBADF && r == 0) | |
1459 | r = -errno; | |
1460 | } | |
1461 | ||
1462 | return r; | |
1463 | } | |
a0d40ac5 LP |
1464 | |
1465 | while ((de = readdir(d))) { | |
a7610064 | 1466 | int fd = -1; |
a0d40ac5 | 1467 | |
a34bf9db | 1468 | if (hidden_file(de->d_name)) |
a0d40ac5 LP |
1469 | continue; |
1470 | ||
720ce21d LP |
1471 | if (safe_atoi(de->d_name, &fd) < 0) |
1472 | /* Let's better ignore this, just in case */ | |
1473 | continue; | |
a0d40ac5 LP |
1474 | |
1475 | if (fd < 3) | |
1476 | continue; | |
1477 | ||
1478 | if (fd == dirfd(d)) | |
1479 | continue; | |
1480 | ||
b19be9eb LP |
1481 | if (fd_in_set(fd, except, n_except)) |
1482 | continue; | |
a0d40ac5 | 1483 | |
720ce21d | 1484 | if (close_nointr(fd) < 0) { |
2f357920 | 1485 | /* Valgrind has its own FD and doesn't want to have it closed */ |
720ce21d LP |
1486 | if (errno != EBADF && r == 0) |
1487 | r = -errno; | |
2f357920 | 1488 | } |
a0d40ac5 LP |
1489 | } |
1490 | ||
a0d40ac5 LP |
1491 | return r; |
1492 | } | |
1493 | ||
db12775d LP |
1494 | bool chars_intersect(const char *a, const char *b) { |
1495 | const char *p; | |
1496 | ||
1497 | /* Returns true if any of the chars in a are in b. */ | |
1498 | for (p = a; *p; p++) | |
1499 | if (strchr(b, *p)) | |
1500 | return true; | |
1501 | ||
1502 | return false; | |
1503 | } | |
1504 | ||
42856c10 | 1505 | bool fstype_is_network(const char *fstype) { |
a05f97b3 | 1506 | static const char table[] = |
ba89821c | 1507 | "afs\0" |
a05f97b3 LP |
1508 | "cifs\0" |
1509 | "smbfs\0" | |
da92ca5e | 1510 | "sshfs\0" |
a05f97b3 | 1511 | "ncpfs\0" |
dac70dc7 | 1512 | "ncp\0" |
a05f97b3 LP |
1513 | "nfs\0" |
1514 | "nfs4\0" | |
1515 | "gfs\0" | |
67608cad LP |
1516 | "gfs2\0" |
1517 | "glusterfs\0"; | |
1518 | ||
1519 | const char *x; | |
1520 | ||
1521 | x = startswith(fstype, "fuse."); | |
1522 | if (x) | |
1523 | fstype = x; | |
42856c10 | 1524 | |
a05f97b3 | 1525 | return nulstr_contains(table, fstype); |
42856c10 LP |
1526 | } |
1527 | ||
80876c20 | 1528 | int flush_fd(int fd) { |
b92bea5d ZJS |
1529 | struct pollfd pollfd = { |
1530 | .fd = fd, | |
1531 | .events = POLLIN, | |
1532 | }; | |
80876c20 LP |
1533 | |
1534 | for (;;) { | |
20c03b7b | 1535 | char buf[LINE_MAX]; |
80876c20 LP |
1536 | ssize_t l; |
1537 | int r; | |
1538 | ||
e62d8c39 ZJS |
1539 | r = poll(&pollfd, 1, 0); |
1540 | if (r < 0) { | |
80876c20 LP |
1541 | if (errno == EINTR) |
1542 | continue; | |
1543 | ||
1544 | return -errno; | |
80876c20 | 1545 | |
e62d8c39 | 1546 | } else if (r == 0) |
80876c20 LP |
1547 | return 0; |
1548 | ||
e62d8c39 ZJS |
1549 | l = read(fd, buf, sizeof(buf)); |
1550 | if (l < 0) { | |
80876c20 LP |
1551 | |
1552 | if (errno == EINTR) | |
1553 | continue; | |
1554 | ||
1555 | if (errno == EAGAIN) | |
1556 | return 0; | |
1557 | ||
1558 | return -errno; | |
e62d8c39 | 1559 | } else if (l == 0) |
80876c20 LP |
1560 | return 0; |
1561 | } | |
1562 | } | |
1563 | ||
9a34ec5f LP |
1564 | int sigaction_many(const struct sigaction *sa, ...) { |
1565 | va_list ap; | |
1566 | int r = 0, sig; | |
1567 | ||
1568 | va_start(ap, sa); | |
1569 | while ((sig = va_arg(ap, int)) > 0) | |
1570 | if (sigaction(sig, sa, NULL) < 0) | |
1571 | r = -errno; | |
1572 | va_end(ap); | |
1573 | ||
1574 | return r; | |
1575 | } | |
1576 | ||
1577 | int ignore_signals(int sig, ...) { | |
b92bea5d ZJS |
1578 | struct sigaction sa = { |
1579 | .sa_handler = SIG_IGN, | |
1580 | .sa_flags = SA_RESTART, | |
1581 | }; | |
9a34ec5f LP |
1582 | va_list ap; |
1583 | int r = 0; | |
a337c6fc | 1584 | |
9a34ec5f LP |
1585 | if (sigaction(sig, &sa, NULL) < 0) |
1586 | r = -errno; | |
1587 | ||
1588 | va_start(ap, sig); | |
1589 | while ((sig = va_arg(ap, int)) > 0) | |
1590 | if (sigaction(sig, &sa, NULL) < 0) | |
1591 | r = -errno; | |
1592 | va_end(ap); | |
1593 | ||
1594 | return r; | |
1595 | } | |
1596 | ||
1597 | int default_signals(int sig, ...) { | |
b92bea5d ZJS |
1598 | struct sigaction sa = { |
1599 | .sa_handler = SIG_DFL, | |
1600 | .sa_flags = SA_RESTART, | |
1601 | }; | |
9a34ec5f LP |
1602 | va_list ap; |
1603 | int r = 0; | |
1604 | ||
9a34ec5f LP |
1605 | if (sigaction(sig, &sa, NULL) < 0) |
1606 | r = -errno; | |
1607 | ||
1608 | va_start(ap, sig); | |
1609 | while ((sig = va_arg(ap, int)) > 0) | |
1610 | if (sigaction(sig, &sa, NULL) < 0) | |
1611 | r = -errno; | |
1612 | va_end(ap); | |
1613 | ||
1614 | return r; | |
a337c6fc LP |
1615 | } |
1616 | ||
3d94f76c | 1617 | void safe_close_pair(int p[]) { |
8d567588 LP |
1618 | assert(p); |
1619 | ||
3d94f76c LP |
1620 | if (p[0] == p[1]) { |
1621 | /* Special case pairs which use the same fd in both | |
1622 | * directions... */ | |
1623 | p[0] = p[1] = safe_close(p[0]); | |
1624 | return; | |
8d567588 LP |
1625 | } |
1626 | ||
3d94f76c LP |
1627 | p[0] = safe_close(p[0]); |
1628 | p[1] = safe_close(p[1]); | |
8d567588 LP |
1629 | } |
1630 | ||
eb22ac37 | 1631 | ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 1632 | uint8_t *p = buf; |
8d567588 LP |
1633 | ssize_t n = 0; |
1634 | ||
1635 | assert(fd >= 0); | |
1636 | assert(buf); | |
1637 | ||
8d567588 LP |
1638 | while (nbytes > 0) { |
1639 | ssize_t k; | |
1640 | ||
7d5dd5e0 | 1641 | k = read(fd, p, nbytes); |
6ce830fa LP |
1642 | if (k < 0) { |
1643 | if (errno == EINTR) | |
1644 | continue; | |
8d567588 | 1645 | |
6ce830fa | 1646 | if (errno == EAGAIN && do_poll) { |
8d567588 | 1647 | |
6ce830fa LP |
1648 | /* We knowingly ignore any return value here, |
1649 | * and expect that any error/EOF is reported | |
1650 | * via read() */ | |
8d567588 | 1651 | |
6ce830fa LP |
1652 | fd_wait_for_event(fd, POLLIN, USEC_INFINITY); |
1653 | continue; | |
1654 | } | |
1655 | ||
1656 | return n > 0 ? n : -errno; | |
7d5dd5e0 | 1657 | } |
8d567588 | 1658 | |
6ce830fa LP |
1659 | if (k == 0) |
1660 | return n; | |
8d567588 LP |
1661 | |
1662 | p += k; | |
1663 | nbytes -= k; | |
1664 | n += k; | |
1665 | } | |
1666 | ||
1667 | return n; | |
1668 | } | |
1669 | ||
a6dcc7e5 ZJS |
1670 | int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll) { |
1671 | ssize_t n; | |
1672 | ||
1673 | n = loop_read(fd, buf, nbytes, do_poll); | |
1674 | if (n < 0) | |
1675 | return n; | |
1676 | if ((size_t) n != nbytes) | |
1677 | return -EIO; | |
1678 | return 0; | |
1679 | } | |
1680 | ||
553acb7b | 1681 | int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) { |
7d5dd5e0 | 1682 | const uint8_t *p = buf; |
eb22ac37 LP |
1683 | |
1684 | assert(fd >= 0); | |
1685 | assert(buf); | |
1686 | ||
553acb7b ZJS |
1687 | errno = 0; |
1688 | ||
8c7e28a1 | 1689 | do { |
eb22ac37 LP |
1690 | ssize_t k; |
1691 | ||
fe652127 | 1692 | k = write(fd, p, nbytes); |
6ce830fa LP |
1693 | if (k < 0) { |
1694 | if (errno == EINTR) | |
1695 | continue; | |
eb22ac37 | 1696 | |
6ce830fa LP |
1697 | if (errno == EAGAIN && do_poll) { |
1698 | /* We knowingly ignore any return value here, | |
1699 | * and expect that any error/EOF is reported | |
1700 | * via write() */ | |
eb22ac37 | 1701 | |
6ce830fa LP |
1702 | fd_wait_for_event(fd, POLLOUT, USEC_INFINITY); |
1703 | continue; | |
1704 | } | |
eb22ac37 | 1705 | |
6ce830fa | 1706 | return -errno; |
7d5dd5e0 | 1707 | } |
eb22ac37 | 1708 | |
8c7e28a1 | 1709 | if (nbytes > 0 && k == 0) /* Can't really happen */ |
6ce830fa | 1710 | return -EIO; |
eb22ac37 LP |
1711 | |
1712 | p += k; | |
1713 | nbytes -= k; | |
8c7e28a1 | 1714 | } while (nbytes > 0); |
eb22ac37 | 1715 | |
553acb7b | 1716 | return 0; |
eb22ac37 LP |
1717 | } |
1718 | ||
5556b5fe LP |
1719 | int parse_size(const char *t, off_t base, off_t *size) { |
1720 | ||
55ede093 | 1721 | /* Soo, sometimes we want to parse IEC binary suffixes, and |
5556b5fe LP |
1722 | * sometimes SI decimal suffixes. This function can parse |
1723 | * both. Which one is the right way depends on the | |
1724 | * context. Wikipedia suggests that SI is customary for | |
30a5b782 | 1725 | * hardware metrics and network speeds, while IEC is |
5556b5fe LP |
1726 | * customary for most data sizes used by software and volatile |
1727 | * (RAM) memory. Hence be careful which one you pick! | |
1728 | * | |
1729 | * In either case we use just K, M, G as suffix, and not Ki, | |
1730 | * Mi, Gi or so (as IEC would suggest). That's because that's | |
1731 | * frickin' ugly. But this means you really need to make sure | |
1732 | * to document which base you are parsing when you use this | |
1733 | * call. */ | |
1734 | ||
1735 | struct table { | |
ab1f0633 | 1736 | const char *suffix; |
b32ff512 | 1737 | unsigned long long factor; |
5556b5fe LP |
1738 | }; |
1739 | ||
1740 | static const struct table iec[] = { | |
32895bb3 | 1741 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
840292be ZJS |
1742 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
1743 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, | |
1744 | { "G", 1024ULL*1024ULL*1024ULL }, | |
1745 | { "M", 1024ULL*1024ULL }, | |
1746 | { "K", 1024ULL }, | |
1747 | { "B", 1 }, | |
ab1f0633 LP |
1748 | { "", 1 }, |
1749 | }; | |
1750 | ||
5556b5fe | 1751 | static const struct table si[] = { |
5556b5fe | 1752 | { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
840292be ZJS |
1753 | { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL }, |
1754 | { "T", 1000ULL*1000ULL*1000ULL*1000ULL }, | |
1755 | { "G", 1000ULL*1000ULL*1000ULL }, | |
1756 | { "M", 1000ULL*1000ULL }, | |
1757 | { "K", 1000ULL }, | |
1758 | { "B", 1 }, | |
5556b5fe LP |
1759 | { "", 1 }, |
1760 | }; | |
1761 | ||
1762 | const struct table *table; | |
ab1f0633 | 1763 | const char *p; |
b32ff512 | 1764 | unsigned long long r = 0; |
840292be | 1765 | unsigned n_entries, start_pos = 0; |
ab1f0633 LP |
1766 | |
1767 | assert(t); | |
5556b5fe LP |
1768 | assert(base == 1000 || base == 1024); |
1769 | assert(size); | |
1770 | ||
1771 | if (base == 1000) { | |
1772 | table = si; | |
1773 | n_entries = ELEMENTSOF(si); | |
1774 | } else { | |
1775 | table = iec; | |
1776 | n_entries = ELEMENTSOF(iec); | |
1777 | } | |
ab1f0633 LP |
1778 | |
1779 | p = t; | |
1780 | do { | |
1781 | long long l; | |
9480794b ZJS |
1782 | unsigned long long l2; |
1783 | double frac = 0; | |
ab1f0633 LP |
1784 | char *e; |
1785 | unsigned i; | |
1786 | ||
1787 | errno = 0; | |
1788 | l = strtoll(p, &e, 10); | |
1789 | ||
8333c77e | 1790 | if (errno > 0) |
ab1f0633 LP |
1791 | return -errno; |
1792 | ||
1793 | if (l < 0) | |
1794 | return -ERANGE; | |
1795 | ||
1796 | if (e == p) | |
1797 | return -EINVAL; | |
1798 | ||
9480794b ZJS |
1799 | if (*e == '.') { |
1800 | e++; | |
1801 | if (*e >= '0' && *e <= '9') { | |
1802 | char *e2; | |
1803 | ||
1804 | /* strotoull itself would accept space/+/- */ | |
1805 | l2 = strtoull(e, &e2, 10); | |
1806 | ||
1807 | if (errno == ERANGE) | |
1808 | return -errno; | |
1809 | ||
1810 | /* Ignore failure. E.g. 10.M is valid */ | |
1811 | frac = l2; | |
1812 | for (; e < e2; e++) | |
1813 | frac /= 10; | |
1814 | } | |
1815 | } | |
1816 | ||
ab1f0633 LP |
1817 | e += strspn(e, WHITESPACE); |
1818 | ||
840292be | 1819 | for (i = start_pos; i < n_entries; i++) |
ab1f0633 | 1820 | if (startswith(e, table[i].suffix)) { |
b32ff512 | 1821 | unsigned long long tmp; |
9480794b | 1822 | if ((unsigned long long) l + (frac > 0) > ULLONG_MAX / table[i].factor) |
b32ff512 | 1823 | return -ERANGE; |
9480794b | 1824 | tmp = l * table[i].factor + (unsigned long long) (frac * table[i].factor); |
b32ff512 ZJS |
1825 | if (tmp > ULLONG_MAX - r) |
1826 | return -ERANGE; | |
1827 | ||
1828 | r += tmp; | |
1829 | if ((unsigned long long) (off_t) r != r) | |
1830 | return -ERANGE; | |
1831 | ||
ab1f0633 | 1832 | p = e + strlen(table[i].suffix); |
840292be ZJS |
1833 | |
1834 | start_pos = i + 1; | |
ab1f0633 LP |
1835 | break; |
1836 | } | |
1837 | ||
5556b5fe | 1838 | if (i >= n_entries) |
ab1f0633 LP |
1839 | return -EINVAL; |
1840 | ||
b32ff512 | 1841 | } while (*p); |
ab1f0633 | 1842 | |
5556b5fe | 1843 | *size = r; |
ab1f0633 LP |
1844 | |
1845 | return 0; | |
1846 | } | |
1847 | ||
8407a5d0 LP |
1848 | bool is_device_path(const char *path) { |
1849 | ||
1850 | /* Returns true on paths that refer to a device, either in | |
1851 | * sysfs or in /dev */ | |
1852 | ||
1853 | return | |
1854 | path_startswith(path, "/dev/") || | |
1855 | path_startswith(path, "/sys/"); | |
1856 | } | |
1857 | ||
01f78473 | 1858 | int dir_is_empty(const char *path) { |
a05f97b3 | 1859 | _cleanup_closedir_ DIR *d; |
01f78473 | 1860 | |
a05f97b3 LP |
1861 | d = opendir(path); |
1862 | if (!d) | |
01f78473 LP |
1863 | return -errno; |
1864 | ||
1865 | for (;;) { | |
7d5e9c0f | 1866 | struct dirent *de; |
01f78473 | 1867 | |
3fd11280 FW |
1868 | errno = 0; |
1869 | de = readdir(d); | |
1870 | if (!de && errno != 0) | |
1871 | return -errno; | |
01f78473 | 1872 | |
a05f97b3 LP |
1873 | if (!de) |
1874 | return 1; | |
01f78473 | 1875 | |
a34bf9db | 1876 | if (!hidden_file(de->d_name)) |
a05f97b3 LP |
1877 | return 0; |
1878 | } | |
01f78473 LP |
1879 | } |
1880 | ||
844ec79b ZJS |
1881 | char* dirname_malloc(const char *path) { |
1882 | char *d, *dir, *dir2; | |
1883 | ||
1884 | d = strdup(path); | |
1885 | if (!d) | |
1886 | return NULL; | |
1887 | dir = dirname(d); | |
1888 | assert(dir); | |
1889 | ||
1890 | if (dir != d) { | |
1891 | dir2 = strdup(dir); | |
1892 | free(d); | |
1893 | return dir2; | |
1894 | } | |
1895 | ||
1896 | return dir; | |
1897 | } | |
1898 | ||
5b6319dc LP |
1899 | void rename_process(const char name[8]) { |
1900 | assert(name); | |
1901 | ||
5d6b1584 LP |
1902 | /* This is a like a poor man's setproctitle(). It changes the |
1903 | * comm field, argv[0], and also the glibc's internally used | |
1904 | * name of the process. For the first one a limit of 16 chars | |
1905 | * applies, to the second one usually one of 10 (i.e. length | |
1906 | * of "/sbin/init"), to the third one one of 7 (i.e. length of | |
1907 | * "systemd"). If you pass a longer string it will be | |
1908 | * truncated */ | |
5b6319dc | 1909 | |
5d6b1584 | 1910 | prctl(PR_SET_NAME, name); |
5b6319dc LP |
1911 | |
1912 | if (program_invocation_name) | |
1913 | strncpy(program_invocation_name, name, strlen(program_invocation_name)); | |
9a0e6896 LP |
1914 | |
1915 | if (saved_argc > 0) { | |
1916 | int i; | |
1917 | ||
1918 | if (saved_argv[0]) | |
1919 | strncpy(saved_argv[0], name, strlen(saved_argv[0])); | |
1920 | ||
1921 | for (i = 1; i < saved_argc; i++) { | |
1922 | if (!saved_argv[i]) | |
1923 | break; | |
1924 | ||
29804cc1 | 1925 | memzero(saved_argv[i], strlen(saved_argv[i])); |
9a0e6896 LP |
1926 | } |
1927 | } | |
5b6319dc LP |
1928 | } |
1929 | ||
7d793605 LP |
1930 | void sigset_add_many(sigset_t *ss, ...) { |
1931 | va_list ap; | |
1932 | int sig; | |
1933 | ||
1934 | assert(ss); | |
1935 | ||
1936 | va_start(ap, ss); | |
1937 | while ((sig = va_arg(ap, int)) > 0) | |
1938 | assert_se(sigaddset(ss, sig) == 0); | |
1939 | va_end(ap); | |
1940 | } | |
1941 | ||
856a5a7d LP |
1942 | int sigprocmask_many(int how, ...) { |
1943 | va_list ap; | |
1944 | sigset_t ss; | |
1945 | int sig; | |
1946 | ||
1947 | assert_se(sigemptyset(&ss) == 0); | |
1948 | ||
1949 | va_start(ap, how); | |
1950 | while ((sig = va_arg(ap, int)) > 0) | |
1951 | assert_se(sigaddset(&ss, sig) == 0); | |
1952 | va_end(ap); | |
1953 | ||
1954 | if (sigprocmask(how, &ss, NULL) < 0) | |
1955 | return -errno; | |
1956 | ||
1957 | return 0; | |
1958 | } | |
f1566e63 | 1959 | char *lookup_uid(uid_t uid) { |
ef2f1067 | 1960 | long bufsize; |
a05f97b3 LP |
1961 | char *name; |
1962 | _cleanup_free_ char *buf = NULL; | |
ef2f1067 | 1963 | struct passwd pwbuf, *pw = NULL; |
ef2f1067 LP |
1964 | |
1965 | /* Shortcut things to avoid NSS lookups */ | |
1966 | if (uid == 0) | |
1967 | return strdup("root"); | |
1968 | ||
7c5f152a LP |
1969 | bufsize = sysconf(_SC_GETPW_R_SIZE_MAX); |
1970 | if (bufsize <= 0) | |
ef2f1067 LP |
1971 | bufsize = 4096; |
1972 | ||
7c5f152a LP |
1973 | buf = malloc(bufsize); |
1974 | if (!buf) | |
ef2f1067 LP |
1975 | return NULL; |
1976 | ||
a05f97b3 LP |
1977 | if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) |
1978 | return strdup(pw->pw_name); | |
ef2f1067 | 1979 | |
de0671ee | 1980 | if (asprintf(&name, UID_FMT, uid) < 0) |
ef2f1067 LP |
1981 | return NULL; |
1982 | ||
1983 | return name; | |
1984 | } | |
1985 | ||
7c5f152a LP |
1986 | char* getlogname_malloc(void) { |
1987 | uid_t uid; | |
1988 | struct stat st; | |
1989 | ||
1990 | if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0) | |
1991 | uid = st.st_uid; | |
1992 | else | |
1993 | uid = getuid(); | |
1994 | ||
1995 | return lookup_uid(uid); | |
1996 | } | |
1997 | ||
1998 | char *getusername_malloc(void) { | |
1999 | const char *e; | |
2000 | ||
2001 | e = getenv("USER"); | |
2002 | if (e) | |
2003 | return strdup(e); | |
2004 | ||
2005 | return lookup_uid(getuid()); | |
2006 | } | |
2007 | ||
c6878637 | 2008 | bool is_temporary_fs(const struct statfs *s) { |
943aad8c | 2009 | assert(s); |
73020ab2 SL |
2010 | |
2011 | return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) || | |
2012 | F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC); | |
943aad8c ZJS |
2013 | } |
2014 | ||
c6878637 | 2015 | int fd_is_temporary_fs(int fd) { |
979ef53a DR |
2016 | struct statfs s; |
2017 | ||
2018 | if (fstatfs(fd, &s) < 0) | |
2019 | return -errno; | |
2020 | ||
2021 | return is_temporary_fs(&s); | |
2022 | } | |
2023 | ||
8c6db833 LP |
2024 | int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
2025 | assert(path); | |
2026 | ||
2027 | /* Under the assumption that we are running privileged we | |
2028 | * first change the access mode and only then hand out | |
2029 | * ownership to avoid a window where access is too open. */ | |
2030 | ||
fed1e721 | 2031 | if (mode != MODE_INVALID) |
8d53b453 LP |
2032 | if (chmod(path, mode) < 0) |
2033 | return -errno; | |
8c6db833 | 2034 | |
fed1e721 | 2035 | if (uid != UID_INVALID || gid != GID_INVALID) |
8d53b453 LP |
2036 | if (chown(path, uid, gid) < 0) |
2037 | return -errno; | |
8c6db833 LP |
2038 | |
2039 | return 0; | |
ef2f1067 LP |
2040 | } |
2041 | ||
f4b47811 LP |
2042 | int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) { |
2043 | assert(fd >= 0); | |
2044 | ||
2045 | /* Under the assumption that we are running privileged we | |
2046 | * first change the access mode and only then hand out | |
2047 | * ownership to avoid a window where access is too open. */ | |
2048 | ||
fed1e721 | 2049 | if (mode != MODE_INVALID) |
9588bc32 LP |
2050 | if (fchmod(fd, mode) < 0) |
2051 | return -errno; | |
f4b47811 | 2052 | |
fed1e721 | 2053 | if (uid != UID_INVALID || gid != GID_INVALID) |
9588bc32 LP |
2054 | if (fchown(fd, uid, gid) < 0) |
2055 | return -errno; | |
f4b47811 LP |
2056 | |
2057 | return 0; | |
2058 | } | |
2059 | ||
82c121a4 LP |
2060 | cpu_set_t* cpu_set_malloc(unsigned *ncpus) { |
2061 | cpu_set_t *r; | |
2062 | unsigned n = 1024; | |
2063 | ||
2064 | /* Allocates the cpuset in the right size */ | |
2065 | ||
2066 | for (;;) { | |
2067 | if (!(r = CPU_ALLOC(n))) | |
2068 | return NULL; | |
2069 | ||
2070 | if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) { | |
2071 | CPU_ZERO_S(CPU_ALLOC_SIZE(n), r); | |
2072 | ||
2073 | if (ncpus) | |
2074 | *ncpus = n; | |
2075 | ||
2076 | return r; | |
2077 | } | |
2078 | ||
2079 | CPU_FREE(r); | |
2080 | ||
2081 | if (errno != EINVAL) | |
2082 | return NULL; | |
2083 | ||
2084 | n *= 2; | |
2085 | } | |
2086 | } | |
2087 | ||
9d9951a4 HH |
2088 | int files_same(const char *filea, const char *fileb) { |
2089 | struct stat a, b; | |
b4f10a5e | 2090 | |
9d9951a4 | 2091 | if (stat(filea, &a) < 0) |
b4f10a5e LP |
2092 | return -errno; |
2093 | ||
9d9951a4 | 2094 | if (stat(fileb, &b) < 0) |
b4f10a5e LP |
2095 | return -errno; |
2096 | ||
9d9951a4 HH |
2097 | return a.st_dev == b.st_dev && |
2098 | a.st_ino == b.st_ino; | |
2099 | } | |
2100 | ||
2101 | int running_in_chroot(void) { | |
2102 | int ret; | |
2103 | ||
2104 | ret = files_same("/proc/1/root", "/"); | |
2105 | if (ret < 0) | |
2106 | return ret; | |
2107 | ||
2108 | return ret == 0; | |
b4f10a5e LP |
2109 | } |
2110 | ||
f405e86d | 2111 | static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
72f59706 | 2112 | size_t x; |
8fe914ec LP |
2113 | char *r; |
2114 | ||
2115 | assert(s); | |
2116 | assert(percent <= 100); | |
72f59706 | 2117 | assert(new_length >= 3); |
8fe914ec | 2118 | |
72f59706 LP |
2119 | if (old_length <= 3 || old_length <= new_length) |
2120 | return strndup(s, old_length); | |
8fe914ec | 2121 | |
72f59706 LP |
2122 | r = new0(char, new_length+1); |
2123 | if (!r) | |
a6f0104a | 2124 | return NULL; |
8fe914ec | 2125 | |
72f59706 | 2126 | x = (new_length * percent) / 100; |
8fe914ec | 2127 | |
72f59706 LP |
2128 | if (x > new_length - 3) |
2129 | x = new_length - 3; | |
8fe914ec LP |
2130 | |
2131 | memcpy(r, s, x); | |
2132 | r[x] = '.'; | |
2133 | r[x+1] = '.'; | |
2134 | r[x+2] = '.'; | |
2135 | memcpy(r + x + 3, | |
72f59706 LP |
2136 | s + old_length - (new_length - x - 3), |
2137 | new_length - x - 3); | |
8fe914ec LP |
2138 | |
2139 | return r; | |
2140 | } | |
2141 | ||
f405e86d SL |
2142 | char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { |
2143 | size_t x; | |
2144 | char *e; | |
2145 | const char *i, *j; | |
2146 | unsigned k, len, len2; | |
2147 | ||
2148 | assert(s); | |
2149 | assert(percent <= 100); | |
2150 | assert(new_length >= 3); | |
2151 | ||
2152 | /* if no multibyte characters use ascii_ellipsize_mem for speed */ | |
2153 | if (ascii_is_valid(s)) | |
2154 | return ascii_ellipsize_mem(s, old_length, new_length, percent); | |
2155 | ||
2156 | if (old_length <= 3 || old_length <= new_length) | |
2157 | return strndup(s, old_length); | |
2158 | ||
2159 | x = (new_length * percent) / 100; | |
2160 | ||
2161 | if (x > new_length - 3) | |
2162 | x = new_length - 3; | |
2163 | ||
2164 | k = 0; | |
2165 | for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) { | |
2166 | int c; | |
2167 | ||
2168 | c = utf8_encoded_to_unichar(i); | |
2169 | if (c < 0) | |
2170 | return NULL; | |
2171 | k += unichar_iswide(c) ? 2 : 1; | |
2172 | } | |
2173 | ||
2174 | if (k > x) /* last character was wide and went over quota */ | |
2175 | x ++; | |
2176 | ||
2177 | for (j = s + old_length; k < new_length && j > i; ) { | |
2178 | int c; | |
2179 | ||
2180 | j = utf8_prev_char(j); | |
2181 | c = utf8_encoded_to_unichar(j); | |
2182 | if (c < 0) | |
2183 | return NULL; | |
2184 | k += unichar_iswide(c) ? 2 : 1; | |
2185 | } | |
2186 | assert(i <= j); | |
2187 | ||
2188 | /* we don't actually need to ellipsize */ | |
2189 | if (i == j) | |
2190 | return memdup(s, old_length + 1); | |
2191 | ||
2192 | /* make space for ellipsis */ | |
2193 | j = utf8_next_char(j); | |
2194 | ||
2195 | len = i - s; | |
2196 | len2 = s + old_length - j; | |
2197 | e = new(char, len + 3 + len2 + 1); | |
2198 | if (!e) | |
2199 | return NULL; | |
2200 | ||
2201 | /* | |
2202 | printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n", | |
2203 | old_length, new_length, x, len, len2, k); | |
2204 | */ | |
2205 | ||
2206 | memcpy(e, s, len); | |
2207 | e[len] = 0xe2; /* tri-dot ellipsis: … */ | |
2208 | e[len + 1] = 0x80; | |
2209 | e[len + 2] = 0xa6; | |
2210 | ||
2211 | memcpy(e + len + 3, j, len2 + 1); | |
2212 | ||
2213 | return e; | |
2214 | } | |
2215 | ||
72f59706 LP |
2216 | char *ellipsize(const char *s, size_t length, unsigned percent) { |
2217 | return ellipsize_mem(s, strlen(s), length, percent); | |
2218 | } | |
2219 | ||
c38dfac9 | 2220 | int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode) { |
03e334a1 | 2221 | _cleanup_close_ int fd; |
c38dfac9 | 2222 | int r; |
f6144808 LP |
2223 | |
2224 | assert(path); | |
2225 | ||
c38dfac9 KS |
2226 | if (parents) |
2227 | mkdir_parents(path, 0755); | |
73836c5c | 2228 | |
c38dfac9 | 2229 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, mode > 0 ? mode : 0644); |
73836c5c | 2230 | if (fd < 0) |
f6144808 LP |
2231 | return -errno; |
2232 | ||
c38dfac9 KS |
2233 | if (mode > 0) { |
2234 | r = fchmod(fd, mode); | |
2235 | if (r < 0) | |
2236 | return -errno; | |
2237 | } | |
2238 | ||
fed1e721 | 2239 | if (uid != UID_INVALID || gid != GID_INVALID) { |
c38dfac9 KS |
2240 | r = fchown(fd, uid, gid); |
2241 | if (r < 0) | |
2242 | return -errno; | |
2243 | } | |
2244 | ||
3a43da28 | 2245 | if (stamp != USEC_INFINITY) { |
c38dfac9 KS |
2246 | struct timespec ts[2]; |
2247 | ||
2248 | timespec_store(&ts[0], stamp); | |
359efc59 | 2249 | ts[1] = ts[0]; |
c38dfac9 KS |
2250 | r = futimens(fd, ts); |
2251 | } else | |
2252 | r = futimens(fd, NULL); | |
2253 | if (r < 0) | |
2254 | return -errno; | |
2255 | ||
f6144808 LP |
2256 | return 0; |
2257 | } | |
afea26ad | 2258 | |
c38dfac9 | 2259 | int touch(const char *path) { |
fed1e721 | 2260 | return touch_file(path, false, USEC_INFINITY, UID_INVALID, GID_INVALID, 0); |
c38dfac9 KS |
2261 | } |
2262 | ||
e1eaca26 | 2263 | static char *unquote(const char *s, const char* quotes) { |
11ce3427 LP |
2264 | size_t l; |
2265 | assert(s); | |
2266 | ||
73836c5c LP |
2267 | /* This is rather stupid, simply removes the heading and |
2268 | * trailing quotes if there is one. Doesn't care about | |
e1eaca26 LP |
2269 | * escaping or anything. |
2270 | * | |
2271 | * DON'T USE THIS FOR NEW CODE ANYMORE!*/ | |
73836c5c | 2272 | |
31ed59c5 LP |
2273 | l = strlen(s); |
2274 | if (l < 2) | |
11ce3427 LP |
2275 | return strdup(s); |
2276 | ||
97c4a07d | 2277 | if (strchr(quotes, s[0]) && s[l-1] == s[0]) |
11ce3427 LP |
2278 | return strndup(s+1, l-2); |
2279 | ||
2280 | return strdup(s); | |
2281 | } | |
2282 | ||
919ce0b7 | 2283 | noreturn void freeze(void) { |
720ce21d LP |
2284 | |
2285 | /* Make sure nobody waits for us on a socket anymore */ | |
2286 | close_all_fds(NULL, 0); | |
2287 | ||
c29597a1 LP |
2288 | sync(); |
2289 | ||
3c14d26c LP |
2290 | for (;;) |
2291 | pause(); | |
2292 | } | |
2293 | ||
00dc5d76 LP |
2294 | bool null_or_empty(struct stat *st) { |
2295 | assert(st); | |
2296 | ||
2297 | if (S_ISREG(st->st_mode) && st->st_size <= 0) | |
2298 | return true; | |
2299 | ||
c8f26f42 | 2300 | if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) |
00dc5d76 LP |
2301 | return true; |
2302 | ||
2303 | return false; | |
2304 | } | |
2305 | ||
83096483 LP |
2306 | int null_or_empty_path(const char *fn) { |
2307 | struct stat st; | |
2308 | ||
2309 | assert(fn); | |
2310 | ||
2311 | if (stat(fn, &st) < 0) | |
2312 | return -errno; | |
2313 | ||
2314 | return null_or_empty(&st); | |
2315 | } | |
2316 | ||
ed88bcfb ZJS |
2317 | int null_or_empty_fd(int fd) { |
2318 | struct stat st; | |
2319 | ||
2320 | assert(fd >= 0); | |
2321 | ||
2322 | if (fstat(fd, &st) < 0) | |
2323 | return -errno; | |
2324 | ||
2325 | return null_or_empty(&st); | |
2326 | } | |
2327 | ||
a247755d | 2328 | DIR *xopendirat(int fd, const char *name, int flags) { |
c4731d11 LP |
2329 | int nfd; |
2330 | DIR *d; | |
2331 | ||
dd94c17e LP |
2332 | assert(!(flags & O_CREAT)); |
2333 | ||
2334 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
73836c5c | 2335 | if (nfd < 0) |
c4731d11 LP |
2336 | return NULL; |
2337 | ||
73836c5c LP |
2338 | d = fdopendir(nfd); |
2339 | if (!d) { | |
03e334a1 | 2340 | safe_close(nfd); |
c4731d11 LP |
2341 | return NULL; |
2342 | } | |
2343 | ||
2344 | return d; | |
3b63d2d3 LP |
2345 | } |
2346 | ||
8a0867d6 LP |
2347 | int signal_from_string_try_harder(const char *s) { |
2348 | int signo; | |
2349 | assert(s); | |
2350 | ||
73836c5c LP |
2351 | signo = signal_from_string(s); |
2352 | if (signo <= 0) | |
8a0867d6 LP |
2353 | if (startswith(s, "SIG")) |
2354 | return signal_from_string(s+3); | |
2355 | ||
2356 | return signo; | |
2357 | } | |
2358 | ||
383182b5 | 2359 | static char *tag_to_udev_node(const char *tagvalue, const char *by) { |
22f5f628 | 2360 | _cleanup_free_ char *t = NULL, *u = NULL; |
22f5f628 | 2361 | size_t enc_len; |
e23a0ce8 | 2362 | |
e1eaca26 | 2363 | u = unquote(tagvalue, QUOTES); |
6db615c1 | 2364 | if (!u) |
383182b5 | 2365 | return NULL; |
e23a0ce8 | 2366 | |
1d5989fd | 2367 | enc_len = strlen(u) * 4 + 1; |
22f5f628 | 2368 | t = new(char, enc_len); |
6db615c1 | 2369 | if (!t) |
383182b5 | 2370 | return NULL; |
e23a0ce8 | 2371 | |
8f6ce71f | 2372 | if (encode_devnode_name(u, t, enc_len) < 0) |
22f5f628 | 2373 | return NULL; |
e23a0ce8 | 2374 | |
6db615c1 | 2375 | return strjoin("/dev/disk/by-", by, "/", t, NULL); |
383182b5 | 2376 | } |
e23a0ce8 | 2377 | |
383182b5 | 2378 | char *fstab_node_to_udev_node(const char *p) { |
faa368e3 LP |
2379 | assert(p); |
2380 | ||
383182b5 DR |
2381 | if (startswith(p, "LABEL=")) |
2382 | return tag_to_udev_node(p+6, "label"); | |
e23a0ce8 | 2383 | |
383182b5 DR |
2384 | if (startswith(p, "UUID=")) |
2385 | return tag_to_udev_node(p+5, "uuid"); | |
e23a0ce8 | 2386 | |
84cc2abf DR |
2387 | if (startswith(p, "PARTUUID=")) |
2388 | return tag_to_udev_node(p+9, "partuuid"); | |
2389 | ||
2390 | if (startswith(p, "PARTLABEL=")) | |
2391 | return tag_to_udev_node(p+10, "partlabel"); | |
2392 | ||
e23a0ce8 LP |
2393 | return strdup(p); |
2394 | } | |
2395 | ||
87d2c1ff | 2396 | bool dirent_is_file(const struct dirent *de) { |
fb19a739 LP |
2397 | assert(de); |
2398 | ||
a34bf9db | 2399 | if (hidden_file(de->d_name)) |
fb19a739 LP |
2400 | return false; |
2401 | ||
2402 | if (de->d_type != DT_REG && | |
2403 | de->d_type != DT_LNK && | |
2404 | de->d_type != DT_UNKNOWN) | |
2405 | return false; | |
2406 | ||
2407 | return true; | |
2408 | } | |
2409 | ||
87d2c1ff LP |
2410 | bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) { |
2411 | assert(de); | |
2412 | ||
a228a22f LP |
2413 | if (de->d_type != DT_REG && |
2414 | de->d_type != DT_LNK && | |
2415 | de->d_type != DT_UNKNOWN) | |
2416 | return false; | |
2417 | ||
a34bf9db | 2418 | if (hidden_file_allow_backup(de->d_name)) |
87d2c1ff LP |
2419 | return false; |
2420 | ||
2421 | return endswith(de->d_name, suffix); | |
2422 | } | |
2423 | ||
e801700e | 2424 | static int do_execute(char **directories, usec_t timeout, char *argv[]) { |
49681057 | 2425 | _cleanup_hashmap_free_free_ Hashmap *pids = NULL; |
e801700e ZJS |
2426 | _cleanup_set_free_free_ Set *seen = NULL; |
2427 | char **directory; | |
83cc030f | 2428 | |
49681057 ZJS |
2429 | /* We fork this all off from a child process so that we can |
2430 | * somewhat cleanly make use of SIGALRM to set a time limit */ | |
83cc030f | 2431 | |
49681057 ZJS |
2432 | reset_all_signal_handlers(); |
2433 | reset_signal_mask(); | |
83cc030f | 2434 | |
49681057 | 2435 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 2436 | |
49681057 ZJS |
2437 | pids = hashmap_new(NULL); |
2438 | if (!pids) | |
2439 | return log_oom(); | |
83cc030f | 2440 | |
e801700e ZJS |
2441 | seen = set_new(&string_hash_ops); |
2442 | if (!seen) | |
2443 | return log_oom(); | |
83cc030f | 2444 | |
e801700e ZJS |
2445 | STRV_FOREACH(directory, directories) { |
2446 | _cleanup_closedir_ DIR *d; | |
2447 | struct dirent *de; | |
83cc030f | 2448 | |
e801700e ZJS |
2449 | d = opendir(*directory); |
2450 | if (!d) { | |
2451 | if (errno == ENOENT) | |
2452 | continue; | |
83cc030f | 2453 | |
e801700e ZJS |
2454 | return log_error_errno(errno, "Failed to open directory %s: %m", *directory); |
2455 | } | |
83cc030f | 2456 | |
e801700e ZJS |
2457 | FOREACH_DIRENT(de, d, break) { |
2458 | _cleanup_free_ char *path = NULL; | |
2459 | pid_t pid; | |
2460 | int r; | |
2461 | ||
2462 | if (!dirent_is_file(de)) | |
2463 | continue; | |
83cc030f | 2464 | |
e801700e ZJS |
2465 | if (set_contains(seen, de->d_name)) { |
2466 | log_debug("%1$s/%2$s skipped (%2$s was already seen).", *directory, de->d_name); | |
2467 | continue; | |
2468 | } | |
2469 | ||
2470 | r = set_put_strdup(seen, de->d_name); | |
2471 | if (r < 0) | |
2472 | return log_oom(); | |
2473 | ||
2474 | path = strjoin(*directory, "/", de->d_name, NULL); | |
2475 | if (!path) | |
2476 | return log_oom(); | |
2477 | ||
2478 | if (null_or_empty_path(path)) { | |
2479 | log_debug("%s is empty (a mask).", path); | |
2480 | continue; | |
7034e9db | 2481 | } |
83cc030f | 2482 | |
e801700e ZJS |
2483 | pid = fork(); |
2484 | if (pid < 0) { | |
2485 | log_error_errno(errno, "Failed to fork: %m"); | |
2486 | continue; | |
2487 | } else if (pid == 0) { | |
2488 | char *_argv[2]; | |
83cc030f | 2489 | |
e801700e | 2490 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
83cc030f | 2491 | |
e801700e ZJS |
2492 | if (!argv) { |
2493 | _argv[0] = path; | |
2494 | _argv[1] = NULL; | |
2495 | argv = _argv; | |
2496 | } else | |
2497 | argv[0] = path; | |
2498 | ||
2499 | execv(path, argv); | |
2500 | return log_error_errno(errno, "Failed to execute %s: %m", path); | |
2501 | } | |
2502 | ||
2503 | log_debug("Spawned %s as " PID_FMT ".", path, pid); | |
83cc030f | 2504 | |
e801700e ZJS |
2505 | r = hashmap_put(pids, UINT_TO_PTR(pid), path); |
2506 | if (r < 0) | |
2507 | return log_oom(); | |
2508 | path = NULL; | |
2509 | } | |
49681057 | 2510 | } |
83cc030f | 2511 | |
49681057 ZJS |
2512 | /* Abort execution of this process after the timout. We simply |
2513 | * rely on SIGALRM as default action terminating the process, | |
2514 | * and turn on alarm(). */ | |
83cc030f | 2515 | |
49681057 ZJS |
2516 | if (timeout != USEC_INFINITY) |
2517 | alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC); | |
83cc030f | 2518 | |
49681057 ZJS |
2519 | while (!hashmap_isempty(pids)) { |
2520 | _cleanup_free_ char *path = NULL; | |
2521 | pid_t pid; | |
aa62a893 | 2522 | |
49681057 ZJS |
2523 | pid = PTR_TO_UINT(hashmap_first_key(pids)); |
2524 | assert(pid > 0); | |
83cc030f | 2525 | |
49681057 ZJS |
2526 | path = hashmap_remove(pids, UINT_TO_PTR(pid)); |
2527 | assert(path); | |
aa62a893 | 2528 | |
49681057 ZJS |
2529 | wait_for_terminate_and_warn(path, pid, true); |
2530 | } | |
aa62a893 | 2531 | |
49681057 ZJS |
2532 | return 0; |
2533 | } | |
aa62a893 | 2534 | |
e801700e | 2535 | void execute_directories(const char* const* directories, usec_t timeout, char *argv[]) { |
49681057 ZJS |
2536 | pid_t executor_pid; |
2537 | int r; | |
e801700e ZJS |
2538 | char *name; |
2539 | char **dirs = (char**) directories; | |
2540 | ||
2541 | assert(!strv_isempty(dirs)); | |
83cc030f | 2542 | |
e801700e ZJS |
2543 | name = basename(dirs[0]); |
2544 | assert(!isempty(name)); | |
aa62a893 | 2545 | |
e801700e ZJS |
2546 | /* Executes all binaries in the directories in parallel and waits |
2547 | * for them to finish. Optionally a timeout is applied. If a file | |
2548 | * with the same name exists in more than one directory, the | |
2549 | * earliest one wins. */ | |
83cc030f | 2550 | |
49681057 ZJS |
2551 | executor_pid = fork(); |
2552 | if (executor_pid < 0) { | |
2553 | log_error_errno(errno, "Failed to fork: %m"); | |
2554 | return; | |
2555 | ||
2556 | } else if (executor_pid == 0) { | |
e801700e | 2557 | r = do_execute(dirs, timeout, argv); |
49681057 | 2558 | _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS); |
aa62a893 | 2559 | } |
83cc030f | 2560 | |
e801700e | 2561 | wait_for_terminate_and_warn(name, executor_pid, true); |
83cc030f LP |
2562 | } |
2563 | ||
05feefe0 LP |
2564 | bool nulstr_contains(const char*nulstr, const char *needle) { |
2565 | const char *i; | |
2566 | ||
2567 | if (!nulstr) | |
2568 | return false; | |
2569 | ||
2570 | NULSTR_FOREACH(i, nulstr) | |
2571 | if (streq(i, needle)) | |
2572 | return true; | |
2573 | ||
2574 | return false; | |
2575 | } | |
2576 | ||
a88c8750 TG |
2577 | bool plymouth_running(void) { |
2578 | return access("/run/plymouth/pid", F_OK) >= 0; | |
2579 | } | |
2580 | ||
9beb3f4d LP |
2581 | char* strshorten(char *s, size_t l) { |
2582 | assert(s); | |
2583 | ||
2584 | if (l < strlen(s)) | |
2585 | s[l] = 0; | |
2586 | ||
2587 | return s; | |
2588 | } | |
2589 | ||
7f0d207d LP |
2590 | bool machine_name_is_valid(const char *s) { |
2591 | ||
2592 | if (!hostname_is_valid(s)) | |
2593 | return false; | |
2594 | ||
2595 | /* Machine names should be useful hostnames, but also be | |
2596 | * useful in unit names, hence we enforce a stricter length | |
2597 | * limitation. */ | |
2598 | ||
2599 | if (strlen(s) > 64) | |
2600 | return false; | |
2601 | ||
2602 | return true; | |
2603 | } | |
2604 | ||
1325aa42 | 2605 | int pipe_eof(int fd) { |
b92bea5d ZJS |
2606 | struct pollfd pollfd = { |
2607 | .fd = fd, | |
2608 | .events = POLLIN|POLLHUP, | |
2609 | }; | |
1325aa42 | 2610 | |
d37a91e8 LP |
2611 | int r; |
2612 | ||
1325aa42 LP |
2613 | r = poll(&pollfd, 1, 0); |
2614 | if (r < 0) | |
2615 | return -errno; | |
2616 | ||
2617 | if (r == 0) | |
2618 | return 0; | |
2619 | ||
2620 | return pollfd.revents & POLLHUP; | |
2621 | } | |
2622 | ||
8f2d43a0 | 2623 | int fd_wait_for_event(int fd, int event, usec_t t) { |
968d3d24 | 2624 | |
b92bea5d ZJS |
2625 | struct pollfd pollfd = { |
2626 | .fd = fd, | |
2627 | .events = event, | |
2628 | }; | |
df50185b | 2629 | |
968d3d24 LP |
2630 | struct timespec ts; |
2631 | int r; | |
2632 | ||
3a43da28 | 2633 | r = ppoll(&pollfd, 1, t == USEC_INFINITY ? NULL : timespec_store(&ts, t), NULL); |
df50185b LP |
2634 | if (r < 0) |
2635 | return -errno; | |
2636 | ||
2637 | if (r == 0) | |
2638 | return 0; | |
2639 | ||
2640 | return pollfd.revents; | |
2641 | } | |
2642 | ||
5a3ab509 LP |
2643 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { |
2644 | FILE *f; | |
2645 | char *t; | |
ae6c3cc0 | 2646 | int r, fd; |
5a3ab509 LP |
2647 | |
2648 | assert(path); | |
2649 | assert(_f); | |
2650 | assert(_temp_path); | |
2651 | ||
ae6c3cc0 LP |
2652 | r = tempfn_xxxxxx(path, &t); |
2653 | if (r < 0) | |
2654 | return r; | |
5a3ab509 | 2655 | |
2d5bdf5b | 2656 | fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC); |
5a3ab509 LP |
2657 | if (fd < 0) { |
2658 | free(t); | |
2659 | return -errno; | |
2660 | } | |
2661 | ||
2662 | f = fdopen(fd, "we"); | |
2663 | if (!f) { | |
2664 | unlink(t); | |
2665 | free(t); | |
2666 | return -errno; | |
2667 | } | |
2668 | ||
2669 | *_f = f; | |
2670 | *_temp_path = t; | |
2671 | ||
2672 | return 0; | |
2673 | } | |
2674 | ||
424a19f8 | 2675 | int symlink_atomic(const char *from, const char *to) { |
2e78fa79 | 2676 | _cleanup_free_ char *t = NULL; |
ae6c3cc0 | 2677 | int r; |
34ca941c LP |
2678 | |
2679 | assert(from); | |
2680 | assert(to); | |
2681 | ||
ae6c3cc0 LP |
2682 | r = tempfn_random(to, &t); |
2683 | if (r < 0) | |
2684 | return r; | |
34ca941c | 2685 | |
424a19f8 LP |
2686 | if (symlink(from, t) < 0) |
2687 | return -errno; | |
34ca941c LP |
2688 | |
2689 | if (rename(t, to) < 0) { | |
2e78fa79 LP |
2690 | unlink_noerrno(t); |
2691 | return -errno; | |
34ca941c LP |
2692 | } |
2693 | ||
424a19f8 | 2694 | return 0; |
34ca941c LP |
2695 | } |
2696 | ||
875e1014 ILG |
2697 | int symlink_idempotent(const char *from, const char *to) { |
2698 | _cleanup_free_ char *p = NULL; | |
2699 | int r; | |
2700 | ||
2701 | assert(from); | |
2702 | assert(to); | |
2703 | ||
2704 | if (symlink(from, to) < 0) { | |
2705 | if (errno != EEXIST) | |
2706 | return -errno; | |
2707 | ||
2708 | r = readlink_malloc(to, &p); | |
2709 | if (r < 0) | |
2710 | return r; | |
2711 | ||
2712 | if (!streq(p, from)) | |
2713 | return -EINVAL; | |
2714 | } | |
2715 | ||
2716 | return 0; | |
2717 | } | |
2718 | ||
1554afae LP |
2719 | int mknod_atomic(const char *path, mode_t mode, dev_t dev) { |
2720 | _cleanup_free_ char *t = NULL; | |
ae6c3cc0 | 2721 | int r; |
1554afae LP |
2722 | |
2723 | assert(path); | |
2724 | ||
ae6c3cc0 LP |
2725 | r = tempfn_random(path, &t); |
2726 | if (r < 0) | |
2727 | return r; | |
1554afae LP |
2728 | |
2729 | if (mknod(t, mode, dev) < 0) | |
2730 | return -errno; | |
2731 | ||
2732 | if (rename(t, path) < 0) { | |
2733 | unlink_noerrno(t); | |
2734 | return -errno; | |
2735 | } | |
2736 | ||
2737 | return 0; | |
2738 | } | |
2739 | ||
2740 | int mkfifo_atomic(const char *path, mode_t mode) { | |
2741 | _cleanup_free_ char *t = NULL; | |
ae6c3cc0 | 2742 | int r; |
1554afae LP |
2743 | |
2744 | assert(path); | |
2745 | ||
ae6c3cc0 LP |
2746 | r = tempfn_random(path, &t); |
2747 | if (r < 0) | |
2748 | return r; | |
1554afae LP |
2749 | |
2750 | if (mkfifo(t, mode) < 0) | |
2751 | return -errno; | |
2752 | ||
2753 | if (rename(t, path) < 0) { | |
2754 | unlink_noerrno(t); | |
2755 | return -errno; | |
2756 | } | |
2757 | ||
2758 | return 0; | |
2759 | } | |
2760 | ||
4d6d6518 LP |
2761 | bool display_is_local(const char *display) { |
2762 | assert(display); | |
2763 | ||
2764 | return | |
2765 | display[0] == ':' && | |
2766 | display[1] >= '0' && | |
2767 | display[1] <= '9'; | |
2768 | } | |
2769 | ||
2770 | int socket_from_display(const char *display, char **path) { | |
2771 | size_t k; | |
2772 | char *f, *c; | |
2773 | ||
2774 | assert(display); | |
2775 | assert(path); | |
2776 | ||
2777 | if (!display_is_local(display)) | |
2778 | return -EINVAL; | |
2779 | ||
2780 | k = strspn(display+1, "0123456789"); | |
2781 | ||
f8294e41 | 2782 | f = new(char, strlen("/tmp/.X11-unix/X") + k + 1); |
4d6d6518 LP |
2783 | if (!f) |
2784 | return -ENOMEM; | |
2785 | ||
2786 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
2787 | memcpy(c, display+1, k); | |
2788 | c[k] = 0; | |
2789 | ||
2790 | *path = f; | |
2791 | ||
2792 | return 0; | |
2793 | } | |
2794 | ||
d05c5031 LP |
2795 | int get_user_creds( |
2796 | const char **username, | |
2797 | uid_t *uid, gid_t *gid, | |
2798 | const char **home, | |
2799 | const char **shell) { | |
2800 | ||
1cccf435 | 2801 | struct passwd *p; |
ddd88763 | 2802 | uid_t u; |
1cccf435 MV |
2803 | |
2804 | assert(username); | |
2805 | assert(*username); | |
1cccf435 MV |
2806 | |
2807 | /* We enforce some special rules for uid=0: in order to avoid | |
2808 | * NSS lookups for root we hardcode its data. */ | |
2809 | ||
2810 | if (streq(*username, "root") || streq(*username, "0")) { | |
2811 | *username = "root"; | |
4b67834e LP |
2812 | |
2813 | if (uid) | |
2814 | *uid = 0; | |
2815 | ||
2816 | if (gid) | |
2817 | *gid = 0; | |
2818 | ||
2819 | if (home) | |
2820 | *home = "/root"; | |
d05c5031 LP |
2821 | |
2822 | if (shell) | |
2823 | *shell = "/bin/sh"; | |
2824 | ||
1cccf435 MV |
2825 | return 0; |
2826 | } | |
2827 | ||
ddd88763 | 2828 | if (parse_uid(*username, &u) >= 0) { |
1cccf435 | 2829 | errno = 0; |
ddd88763 | 2830 | p = getpwuid(u); |
1cccf435 MV |
2831 | |
2832 | /* If there are multiple users with the same id, make | |
2833 | * sure to leave $USER to the configured value instead | |
2834 | * of the first occurrence in the database. However if | |
2835 | * the uid was configured by a numeric uid, then let's | |
2836 | * pick the real username from /etc/passwd. */ | |
2837 | if (p) | |
2838 | *username = p->pw_name; | |
2839 | } else { | |
2840 | errno = 0; | |
2841 | p = getpwnam(*username); | |
2842 | } | |
2843 | ||
2844 | if (!p) | |
8333c77e | 2845 | return errno > 0 ? -errno : -ESRCH; |
1cccf435 | 2846 | |
4b67834e LP |
2847 | if (uid) |
2848 | *uid = p->pw_uid; | |
2849 | ||
2850 | if (gid) | |
2851 | *gid = p->pw_gid; | |
2852 | ||
2853 | if (home) | |
2854 | *home = p->pw_dir; | |
2855 | ||
d05c5031 LP |
2856 | if (shell) |
2857 | *shell = p->pw_shell; | |
2858 | ||
4b67834e LP |
2859 | return 0; |
2860 | } | |
2861 | ||
59164be4 LP |
2862 | char* uid_to_name(uid_t uid) { |
2863 | struct passwd *p; | |
2864 | char *r; | |
2865 | ||
2866 | if (uid == 0) | |
2867 | return strdup("root"); | |
2868 | ||
2869 | p = getpwuid(uid); | |
2870 | if (p) | |
2871 | return strdup(p->pw_name); | |
2872 | ||
de0671ee | 2873 | if (asprintf(&r, UID_FMT, uid) < 0) |
59164be4 LP |
2874 | return NULL; |
2875 | ||
2876 | return r; | |
2877 | } | |
2878 | ||
4468addc LP |
2879 | char* gid_to_name(gid_t gid) { |
2880 | struct group *p; | |
2881 | char *r; | |
2882 | ||
2883 | if (gid == 0) | |
2884 | return strdup("root"); | |
2885 | ||
2886 | p = getgrgid(gid); | |
2887 | if (p) | |
2888 | return strdup(p->gr_name); | |
2889 | ||
de0671ee | 2890 | if (asprintf(&r, GID_FMT, gid) < 0) |
4468addc LP |
2891 | return NULL; |
2892 | ||
2893 | return r; | |
2894 | } | |
2895 | ||
4b67834e LP |
2896 | int get_group_creds(const char **groupname, gid_t *gid) { |
2897 | struct group *g; | |
2898 | gid_t id; | |
2899 | ||
2900 | assert(groupname); | |
2901 | ||
2902 | /* We enforce some special rules for gid=0: in order to avoid | |
2903 | * NSS lookups for root we hardcode its data. */ | |
2904 | ||
2905 | if (streq(*groupname, "root") || streq(*groupname, "0")) { | |
2906 | *groupname = "root"; | |
2907 | ||
2908 | if (gid) | |
2909 | *gid = 0; | |
2910 | ||
2911 | return 0; | |
2912 | } | |
2913 | ||
2914 | if (parse_gid(*groupname, &id) >= 0) { | |
2915 | errno = 0; | |
2916 | g = getgrgid(id); | |
2917 | ||
2918 | if (g) | |
2919 | *groupname = g->gr_name; | |
2920 | } else { | |
2921 | errno = 0; | |
2922 | g = getgrnam(*groupname); | |
2923 | } | |
2924 | ||
2925 | if (!g) | |
8333c77e | 2926 | return errno > 0 ? -errno : -ESRCH; |
4b67834e LP |
2927 | |
2928 | if (gid) | |
2929 | *gid = g->gr_gid; | |
2930 | ||
1cccf435 MV |
2931 | return 0; |
2932 | } | |
2933 | ||
4468addc LP |
2934 | int in_gid(gid_t gid) { |
2935 | gid_t *gids; | |
43673799 LP |
2936 | int ngroups_max, r, i; |
2937 | ||
43673799 LP |
2938 | if (getgid() == gid) |
2939 | return 1; | |
2940 | ||
2941 | if (getegid() == gid) | |
2942 | return 1; | |
2943 | ||
2944 | ngroups_max = sysconf(_SC_NGROUPS_MAX); | |
2945 | assert(ngroups_max > 0); | |
2946 | ||
2947 | gids = alloca(sizeof(gid_t) * ngroups_max); | |
2948 | ||
2949 | r = getgroups(ngroups_max, gids); | |
2950 | if (r < 0) | |
2951 | return -errno; | |
2952 | ||
2953 | for (i = 0; i < r; i++) | |
2954 | if (gids[i] == gid) | |
2955 | return 1; | |
2956 | ||
2957 | return 0; | |
2958 | } | |
2959 | ||
4468addc LP |
2960 | int in_group(const char *name) { |
2961 | int r; | |
2962 | gid_t gid; | |
2963 | ||
2964 | r = get_group_creds(&name, &gid); | |
2965 | if (r < 0) | |
2966 | return r; | |
2967 | ||
2968 | return in_gid(gid); | |
2969 | } | |
2970 | ||
8092a428 | 2971 | int glob_exists(const char *path) { |
7fd1b19b | 2972 | _cleanup_globfree_ glob_t g = {}; |
8d98da3f | 2973 | int k; |
8092a428 LP |
2974 | |
2975 | assert(path); | |
2976 | ||
8092a428 LP |
2977 | errno = 0; |
2978 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); | |
2979 | ||
2980 | if (k == GLOB_NOMATCH) | |
8d98da3f | 2981 | return 0; |
8092a428 | 2982 | else if (k == GLOB_NOSPACE) |
8d98da3f | 2983 | return -ENOMEM; |
8092a428 | 2984 | else if (k == 0) |
8d98da3f | 2985 | return !strv_isempty(g.gl_pathv); |
8092a428 | 2986 | else |
8d98da3f ZJS |
2987 | return errno ? -errno : -EIO; |
2988 | } | |
8092a428 | 2989 | |
8d98da3f ZJS |
2990 | int glob_extend(char ***strv, const char *path) { |
2991 | _cleanup_globfree_ glob_t g = {}; | |
2992 | int k; | |
2993 | char **p; | |
2994 | ||
2995 | errno = 0; | |
a8ccacf5 | 2996 | k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g); |
8d98da3f ZJS |
2997 | |
2998 | if (k == GLOB_NOMATCH) | |
2999 | return -ENOENT; | |
3000 | else if (k == GLOB_NOSPACE) | |
3001 | return -ENOMEM; | |
3002 | else if (k != 0 || strv_isempty(g.gl_pathv)) | |
3003 | return errno ? -errno : -EIO; | |
3004 | ||
3005 | STRV_FOREACH(p, g.gl_pathv) { | |
3006 | k = strv_extend(strv, *p); | |
3007 | if (k < 0) | |
3008 | break; | |
3009 | } | |
3010 | ||
3011 | return k; | |
8092a428 LP |
3012 | } |
3013 | ||
83096483 LP |
3014 | int dirent_ensure_type(DIR *d, struct dirent *de) { |
3015 | struct stat st; | |
3016 | ||
3017 | assert(d); | |
3018 | assert(de); | |
3019 | ||
3020 | if (de->d_type != DT_UNKNOWN) | |
3021 | return 0; | |
3022 | ||
3023 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
3024 | return -errno; | |
3025 | ||
3026 | de->d_type = | |
3027 | S_ISREG(st.st_mode) ? DT_REG : | |
3028 | S_ISDIR(st.st_mode) ? DT_DIR : | |
3029 | S_ISLNK(st.st_mode) ? DT_LNK : | |
3030 | S_ISFIFO(st.st_mode) ? DT_FIFO : | |
3031 | S_ISSOCK(st.st_mode) ? DT_SOCK : | |
3032 | S_ISCHR(st.st_mode) ? DT_CHR : | |
3033 | S_ISBLK(st.st_mode) ? DT_BLK : | |
3034 | DT_UNKNOWN; | |
3035 | ||
3036 | return 0; | |
3037 | } | |
3038 | ||
034a2a52 | 3039 | int get_files_in_directory(const char *path, char ***list) { |
893fa014 ZJS |
3040 | _cleanup_closedir_ DIR *d = NULL; |
3041 | size_t bufsize = 0, n = 0; | |
3042 | _cleanup_strv_free_ char **l = NULL; | |
034a2a52 LP |
3043 | |
3044 | assert(path); | |
d60ef526 LP |
3045 | |
3046 | /* Returns all files in a directory in *list, and the number | |
3047 | * of files as return value. If list is NULL returns only the | |
893fa014 | 3048 | * number. */ |
034a2a52 LP |
3049 | |
3050 | d = opendir(path); | |
8ea913b2 LP |
3051 | if (!d) |
3052 | return -errno; | |
3053 | ||
034a2a52 | 3054 | for (;;) { |
7d5e9c0f | 3055 | struct dirent *de; |
034a2a52 | 3056 | |
3fd11280 FW |
3057 | errno = 0; |
3058 | de = readdir(d); | |
3059 | if (!de && errno != 0) | |
3060 | return -errno; | |
034a2a52 LP |
3061 | if (!de) |
3062 | break; | |
3063 | ||
3064 | dirent_ensure_type(d, de); | |
3065 | ||
3066 | if (!dirent_is_file(de)) | |
3067 | continue; | |
3068 | ||
d60ef526 | 3069 | if (list) { |
893fa014 ZJS |
3070 | /* one extra slot is needed for the terminating NULL */ |
3071 | if (!GREEDY_REALLOC(l, bufsize, n + 2)) | |
3072 | return -ENOMEM; | |
034a2a52 | 3073 | |
893fa014 ZJS |
3074 | l[n] = strdup(de->d_name); |
3075 | if (!l[n]) | |
3076 | return -ENOMEM; | |
034a2a52 | 3077 | |
893fa014 | 3078 | l[++n] = NULL; |
d60ef526 | 3079 | } else |
893fa014 | 3080 | n++; |
034a2a52 LP |
3081 | } |
3082 | ||
893fa014 ZJS |
3083 | if (list) { |
3084 | *list = l; | |
3085 | l = NULL; /* avoid freeing */ | |
3086 | } | |
034a2a52 | 3087 | |
893fa014 | 3088 | return n; |
034a2a52 LP |
3089 | } |
3090 | ||
b7def684 | 3091 | char *strjoin(const char *x, ...) { |
911a4828 LP |
3092 | va_list ap; |
3093 | size_t l; | |
3094 | char *r, *p; | |
3095 | ||
3096 | va_start(ap, x); | |
3097 | ||
3098 | if (x) { | |
3099 | l = strlen(x); | |
3100 | ||
3101 | for (;;) { | |
3102 | const char *t; | |
040f18ea | 3103 | size_t n; |
911a4828 LP |
3104 | |
3105 | t = va_arg(ap, const char *); | |
3106 | if (!t) | |
3107 | break; | |
3108 | ||
040f18ea | 3109 | n = strlen(t); |
e98055de LN |
3110 | if (n > ((size_t) -1) - l) { |
3111 | va_end(ap); | |
040f18ea | 3112 | return NULL; |
e98055de | 3113 | } |
040f18ea LP |
3114 | |
3115 | l += n; | |
911a4828 LP |
3116 | } |
3117 | } else | |
3118 | l = 0; | |
3119 | ||
3120 | va_end(ap); | |
3121 | ||
3122 | r = new(char, l+1); | |
3123 | if (!r) | |
3124 | return NULL; | |
3125 | ||
3126 | if (x) { | |
3127 | p = stpcpy(r, x); | |
3128 | ||
3129 | va_start(ap, x); | |
3130 | ||
3131 | for (;;) { | |
3132 | const char *t; | |
3133 | ||
3134 | t = va_arg(ap, const char *); | |
3135 | if (!t) | |
3136 | break; | |
3137 | ||
3138 | p = stpcpy(p, t); | |
3139 | } | |
8ea913b2 LP |
3140 | |
3141 | va_end(ap); | |
911a4828 LP |
3142 | } else |
3143 | r[0] = 0; | |
3144 | ||
3145 | return r; | |
3146 | } | |
3147 | ||
b636465b | 3148 | bool is_main_thread(void) { |
ec202eae | 3149 | static thread_local int cached = 0; |
b636465b LP |
3150 | |
3151 | if (_unlikely_(cached == 0)) | |
3152 | cached = getpid() == gettid() ? 1 : -1; | |
3153 | ||
3154 | return cached > 0; | |
3155 | } | |
3156 | ||
94959f0f LP |
3157 | int block_get_whole_disk(dev_t d, dev_t *ret) { |
3158 | char *p, *s; | |
3159 | int r; | |
3160 | unsigned n, m; | |
3161 | ||
3162 | assert(ret); | |
3163 | ||
3164 | /* If it has a queue this is good enough for us */ | |
3165 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0) | |
3166 | return -ENOMEM; | |
3167 | ||
3168 | r = access(p, F_OK); | |
3169 | free(p); | |
3170 | ||
3171 | if (r >= 0) { | |
3172 | *ret = d; | |
3173 | return 0; | |
3174 | } | |
3175 | ||
3176 | /* If it is a partition find the originating device */ | |
3177 | if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0) | |
3178 | return -ENOMEM; | |
3179 | ||
3180 | r = access(p, F_OK); | |
3181 | free(p); | |
3182 | ||
3183 | if (r < 0) | |
3184 | return -ENOENT; | |
3185 | ||
3186 | /* Get parent dev_t */ | |
3187 | if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0) | |
3188 | return -ENOMEM; | |
3189 | ||
3190 | r = read_one_line_file(p, &s); | |
3191 | free(p); | |
3192 | ||
3193 | if (r < 0) | |
3194 | return r; | |
3195 | ||
3196 | r = sscanf(s, "%u:%u", &m, &n); | |
3197 | free(s); | |
3198 | ||
3199 | if (r != 2) | |
3200 | return -EINVAL; | |
3201 | ||
3202 | /* Only return this if it is really good enough for us. */ | |
3203 | if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0) | |
3204 | return -ENOMEM; | |
3205 | ||
3206 | r = access(p, F_OK); | |
3207 | free(p); | |
3208 | ||
3209 | if (r >= 0) { | |
3210 | *ret = makedev(m, n); | |
3211 | return 0; | |
3212 | } | |
3213 | ||
3214 | return -ENOENT; | |
3215 | } | |
3216 | ||
f41607a6 LP |
3217 | static const char *const ioprio_class_table[] = { |
3218 | [IOPRIO_CLASS_NONE] = "none", | |
3219 | [IOPRIO_CLASS_RT] = "realtime", | |
3220 | [IOPRIO_CLASS_BE] = "best-effort", | |
3221 | [IOPRIO_CLASS_IDLE] = "idle" | |
3222 | }; | |
3223 | ||
f8b69d1d | 3224 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX); |
f41607a6 LP |
3225 | |
3226 | static const char *const sigchld_code_table[] = { | |
3227 | [CLD_EXITED] = "exited", | |
3228 | [CLD_KILLED] = "killed", | |
3229 | [CLD_DUMPED] = "dumped", | |
3230 | [CLD_TRAPPED] = "trapped", | |
3231 | [CLD_STOPPED] = "stopped", | |
3232 | [CLD_CONTINUED] = "continued", | |
3233 | }; | |
3234 | ||
3235 | DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int); | |
3236 | ||
3237 | static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = { | |
3238 | [LOG_FAC(LOG_KERN)] = "kern", | |
3239 | [LOG_FAC(LOG_USER)] = "user", | |
3240 | [LOG_FAC(LOG_MAIL)] = "mail", | |
3241 | [LOG_FAC(LOG_DAEMON)] = "daemon", | |
3242 | [LOG_FAC(LOG_AUTH)] = "auth", | |
3243 | [LOG_FAC(LOG_SYSLOG)] = "syslog", | |
3244 | [LOG_FAC(LOG_LPR)] = "lpr", | |
3245 | [LOG_FAC(LOG_NEWS)] = "news", | |
3246 | [LOG_FAC(LOG_UUCP)] = "uucp", | |
3247 | [LOG_FAC(LOG_CRON)] = "cron", | |
3248 | [LOG_FAC(LOG_AUTHPRIV)] = "authpriv", | |
3249 | [LOG_FAC(LOG_FTP)] = "ftp", | |
3250 | [LOG_FAC(LOG_LOCAL0)] = "local0", | |
3251 | [LOG_FAC(LOG_LOCAL1)] = "local1", | |
3252 | [LOG_FAC(LOG_LOCAL2)] = "local2", | |
3253 | [LOG_FAC(LOG_LOCAL3)] = "local3", | |
3254 | [LOG_FAC(LOG_LOCAL4)] = "local4", | |
3255 | [LOG_FAC(LOG_LOCAL5)] = "local5", | |
3256 | [LOG_FAC(LOG_LOCAL6)] = "local6", | |
3257 | [LOG_FAC(LOG_LOCAL7)] = "local7" | |
3258 | }; | |
3259 | ||
f8b69d1d | 3260 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0)); |
f41607a6 LP |
3261 | |
3262 | static const char *const log_level_table[] = { | |
3263 | [LOG_EMERG] = "emerg", | |
3264 | [LOG_ALERT] = "alert", | |
3265 | [LOG_CRIT] = "crit", | |
3266 | [LOG_ERR] = "err", | |
3267 | [LOG_WARNING] = "warning", | |
3268 | [LOG_NOTICE] = "notice", | |
3269 | [LOG_INFO] = "info", | |
3270 | [LOG_DEBUG] = "debug" | |
3271 | }; | |
3272 | ||
f8b69d1d | 3273 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG); |
f41607a6 LP |
3274 | |
3275 | static const char* const sched_policy_table[] = { | |
3276 | [SCHED_OTHER] = "other", | |
3277 | [SCHED_BATCH] = "batch", | |
3278 | [SCHED_IDLE] = "idle", | |
3279 | [SCHED_FIFO] = "fifo", | |
3280 | [SCHED_RR] = "rr" | |
3281 | }; | |
3282 | ||
f8b69d1d | 3283 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX); |
f41607a6 | 3284 | |
517d56b1 | 3285 | static const char* const rlimit_table[_RLIMIT_MAX] = { |
f41607a6 LP |
3286 | [RLIMIT_CPU] = "LimitCPU", |
3287 | [RLIMIT_FSIZE] = "LimitFSIZE", | |
3288 | [RLIMIT_DATA] = "LimitDATA", | |
3289 | [RLIMIT_STACK] = "LimitSTACK", | |
3290 | [RLIMIT_CORE] = "LimitCORE", | |
3291 | [RLIMIT_RSS] = "LimitRSS", | |
3292 | [RLIMIT_NOFILE] = "LimitNOFILE", | |
3293 | [RLIMIT_AS] = "LimitAS", | |
3294 | [RLIMIT_NPROC] = "LimitNPROC", | |
3295 | [RLIMIT_MEMLOCK] = "LimitMEMLOCK", | |
3296 | [RLIMIT_LOCKS] = "LimitLOCKS", | |
3297 | [RLIMIT_SIGPENDING] = "LimitSIGPENDING", | |
3298 | [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE", | |
3299 | [RLIMIT_NICE] = "LimitNICE", | |
3300 | [RLIMIT_RTPRIO] = "LimitRTPRIO", | |
3301 | [RLIMIT_RTTIME] = "LimitRTTIME" | |
3302 | }; | |
3303 | ||
3304 | DEFINE_STRING_TABLE_LOOKUP(rlimit, int); | |
3305 | ||
3306 | static const char* const ip_tos_table[] = { | |
3307 | [IPTOS_LOWDELAY] = "low-delay", | |
3308 | [IPTOS_THROUGHPUT] = "throughput", | |
3309 | [IPTOS_RELIABILITY] = "reliability", | |
3310 | [IPTOS_LOWCOST] = "low-cost", | |
3311 | }; | |
3312 | ||
f8b69d1d | 3313 | DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff); |
f41607a6 | 3314 | |
4e240ab0 | 3315 | static const char *const __signal_table[] = { |
f41607a6 LP |
3316 | [SIGHUP] = "HUP", |
3317 | [SIGINT] = "INT", | |
3318 | [SIGQUIT] = "QUIT", | |
3319 | [SIGILL] = "ILL", | |
3320 | [SIGTRAP] = "TRAP", | |
3321 | [SIGABRT] = "ABRT", | |
3322 | [SIGBUS] = "BUS", | |
3323 | [SIGFPE] = "FPE", | |
3324 | [SIGKILL] = "KILL", | |
3325 | [SIGUSR1] = "USR1", | |
3326 | [SIGSEGV] = "SEGV", | |
3327 | [SIGUSR2] = "USR2", | |
3328 | [SIGPIPE] = "PIPE", | |
3329 | [SIGALRM] = "ALRM", | |
3330 | [SIGTERM] = "TERM", | |
3331 | #ifdef SIGSTKFLT | |
3332 | [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ | |
3333 | #endif | |
3334 | [SIGCHLD] = "CHLD", | |
3335 | [SIGCONT] = "CONT", | |
3336 | [SIGSTOP] = "STOP", | |
3337 | [SIGTSTP] = "TSTP", | |
3338 | [SIGTTIN] = "TTIN", | |
3339 | [SIGTTOU] = "TTOU", | |
3340 | [SIGURG] = "URG", | |
3341 | [SIGXCPU] = "XCPU", | |
3342 | [SIGXFSZ] = "XFSZ", | |
3343 | [SIGVTALRM] = "VTALRM", | |
3344 | [SIGPROF] = "PROF", | |
3345 | [SIGWINCH] = "WINCH", | |
3346 | [SIGIO] = "IO", | |
3347 | [SIGPWR] = "PWR", | |
3348 | [SIGSYS] = "SYS" | |
3349 | }; | |
3350 | ||
4e240ab0 MS |
3351 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); |
3352 | ||
3353 | const char *signal_to_string(int signo) { | |
ec202eae | 3354 | static thread_local char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1]; |
4e240ab0 MS |
3355 | const char *name; |
3356 | ||
3357 | name = __signal_to_string(signo); | |
3358 | if (name) | |
3359 | return name; | |
3360 | ||
3361 | if (signo >= SIGRTMIN && signo <= SIGRTMAX) | |
fa70beaa | 3362 | snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN); |
4e240ab0 | 3363 | else |
fa70beaa LP |
3364 | snprintf(buf, sizeof(buf), "%d", signo); |
3365 | ||
4e240ab0 MS |
3366 | return buf; |
3367 | } | |
3368 | ||
3369 | int signal_from_string(const char *s) { | |
3370 | int signo; | |
3371 | int offset = 0; | |
3372 | unsigned u; | |
3373 | ||
040f18ea | 3374 | signo = __signal_from_string(s); |
4e240ab0 MS |
3375 | if (signo > 0) |
3376 | return signo; | |
3377 | ||
3378 | if (startswith(s, "RTMIN+")) { | |
3379 | s += 6; | |
3380 | offset = SIGRTMIN; | |
3381 | } | |
3382 | if (safe_atou(s, &u) >= 0) { | |
3383 | signo = (int) u + offset; | |
3384 | if (signo > 0 && signo < _NSIG) | |
3385 | return signo; | |
3386 | } | |
7e8185ef | 3387 | return -EINVAL; |
4e240ab0 | 3388 | } |
65457142 FC |
3389 | |
3390 | bool kexec_loaded(void) { | |
3391 | bool loaded = false; | |
3392 | char *s; | |
3393 | ||
3394 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) { | |
3395 | if (s[0] == '1') | |
3396 | loaded = true; | |
3397 | free(s); | |
3398 | } | |
3399 | return loaded; | |
3400 | } | |
fb9de93d | 3401 | |
87d2c1ff LP |
3402 | int prot_from_flags(int flags) { |
3403 | ||
3404 | switch (flags & O_ACCMODE) { | |
3405 | ||
3406 | case O_RDONLY: | |
3407 | return PROT_READ; | |
3408 | ||
3409 | case O_WRONLY: | |
3410 | return PROT_WRITE; | |
3411 | ||
3412 | case O_RDWR: | |
3413 | return PROT_READ|PROT_WRITE; | |
3414 | ||
3415 | default: | |
3416 | return -EINVAL; | |
3417 | } | |
7c99e0c1 | 3418 | } |
689b9a22 | 3419 | |
babfc091 | 3420 | char *format_bytes(char *buf, size_t l, off_t t) { |
c0f99c21 | 3421 | unsigned i; |
babfc091 LP |
3422 | |
3423 | static const struct { | |
3424 | const char *suffix; | |
3425 | off_t factor; | |
3426 | } table[] = { | |
32895bb3 LP |
3427 | { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, |
3428 | { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL }, | |
babfc091 LP |
3429 | { "T", 1024ULL*1024ULL*1024ULL*1024ULL }, |
3430 | { "G", 1024ULL*1024ULL*1024ULL }, | |
3431 | { "M", 1024ULL*1024ULL }, | |
3432 | { "K", 1024ULL }, | |
3433 | }; | |
3434 | ||
f02ca522 LP |
3435 | if (t == (off_t) -1) |
3436 | return NULL; | |
3437 | ||
babfc091 LP |
3438 | for (i = 0; i < ELEMENTSOF(table); i++) { |
3439 | ||
3440 | if (t >= table[i].factor) { | |
3441 | snprintf(buf, l, | |
3442 | "%llu.%llu%s", | |
3443 | (unsigned long long) (t / table[i].factor), | |
3444 | (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL), | |
3445 | table[i].suffix); | |
3446 | ||
3447 | goto finish; | |
3448 | } | |
3449 | } | |
3450 | ||
3451 | snprintf(buf, l, "%lluB", (unsigned long long) t); | |
3452 | ||
3453 | finish: | |
3454 | buf[l-1] = 0; | |
3455 | return buf; | |
3456 | ||
3457 | } | |
55d7bfc1 LP |
3458 | |
3459 | void* memdup(const void *p, size_t l) { | |
3460 | void *r; | |
3461 | ||
3462 | assert(p); | |
3463 | ||
3464 | r = malloc(l); | |
3465 | if (!r) | |
3466 | return NULL; | |
3467 | ||
3468 | memcpy(r, p, l); | |
3469 | return r; | |
3470 | } | |
bb99a35a LP |
3471 | |
3472 | int fd_inc_sndbuf(int fd, size_t n) { | |
3473 | int r, value; | |
3474 | socklen_t l = sizeof(value); | |
3475 | ||
3476 | r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l); | |
92d75ca4 | 3477 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
3478 | return 0; |
3479 | ||
92d75ca4 LP |
3480 | /* If we have the privileges we will ignore the kernel limit. */ |
3481 | ||
bb99a35a | 3482 | value = (int) n; |
92d75ca4 LP |
3483 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) |
3484 | if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) | |
3485 | return -errno; | |
bb99a35a LP |
3486 | |
3487 | return 1; | |
3488 | } | |
3489 | ||
3490 | int fd_inc_rcvbuf(int fd, size_t n) { | |
3491 | int r, value; | |
3492 | socklen_t l = sizeof(value); | |
3493 | ||
3494 | r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l); | |
92d75ca4 | 3495 | if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2) |
bb99a35a LP |
3496 | return 0; |
3497 | ||
92d75ca4 | 3498 | /* If we have the privileges we will ignore the kernel limit. */ |
bb99a35a | 3499 | |
92d75ca4 LP |
3500 | value = (int) n; |
3501 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) | |
3502 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) | |
3503 | return -errno; | |
bb99a35a LP |
3504 | return 1; |
3505 | } | |
6bb92a16 | 3506 | |
9bdc770c | 3507 | int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) { |
6bb92a16 | 3508 | bool stdout_is_tty, stderr_is_tty; |
8a7c93d8 LP |
3509 | pid_t parent_pid, agent_pid; |
3510 | sigset_t ss, saved_ss; | |
6bb92a16 LP |
3511 | unsigned n, i; |
3512 | va_list ap; | |
3513 | char **l; | |
3514 | ||
3515 | assert(pid); | |
3516 | assert(path); | |
3517 | ||
6bb92a16 LP |
3518 | /* Spawns a temporary TTY agent, making sure it goes away when |
3519 | * we go away */ | |
3520 | ||
8a7c93d8 LP |
3521 | parent_pid = getpid(); |
3522 | ||
3523 | /* First we temporarily block all signals, so that the new | |
3524 | * child has them blocked initially. This way, we can be sure | |
3525 | * that SIGTERMs are not lost we might send to the agent. */ | |
3526 | assert_se(sigfillset(&ss) >= 0); | |
3527 | assert_se(sigprocmask(SIG_SETMASK, &ss, &saved_ss) >= 0); | |
3528 | ||
6bb92a16 | 3529 | agent_pid = fork(); |
8a7c93d8 LP |
3530 | if (agent_pid < 0) { |
3531 | assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0); | |
6bb92a16 | 3532 | return -errno; |
8a7c93d8 | 3533 | } |
6bb92a16 LP |
3534 | |
3535 | if (agent_pid != 0) { | |
8a7c93d8 | 3536 | assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0); |
6bb92a16 LP |
3537 | *pid = agent_pid; |
3538 | return 0; | |
3539 | } | |
3540 | ||
3541 | /* In the child: | |
3542 | * | |
3543 | * Make sure the agent goes away when the parent dies */ | |
3544 | if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) | |
3545 | _exit(EXIT_FAILURE); | |
3546 | ||
8a7c93d8 LP |
3547 | /* Make sure we actually can kill the agent, if we need to, in |
3548 | * case somebody invoked us from a shell script that trapped | |
3549 | * SIGTERM or so... */ | |
3550 | reset_all_signal_handlers(); | |
3551 | reset_signal_mask(); | |
3552 | ||
6bb92a16 | 3553 | /* Check whether our parent died before we were able |
8a7c93d8 | 3554 | * to set the death signal and unblock the signals */ |
6bb92a16 LP |
3555 | if (getppid() != parent_pid) |
3556 | _exit(EXIT_SUCCESS); | |
3557 | ||
3558 | /* Don't leak fds to the agent */ | |
9bdc770c | 3559 | close_all_fds(except, n_except); |
6bb92a16 LP |
3560 | |
3561 | stdout_is_tty = isatty(STDOUT_FILENO); | |
3562 | stderr_is_tty = isatty(STDERR_FILENO); | |
3563 | ||
3564 | if (!stdout_is_tty || !stderr_is_tty) { | |
8a7c93d8 LP |
3565 | int fd; |
3566 | ||
6bb92a16 LP |
3567 | /* Detach from stdout/stderr. and reopen |
3568 | * /dev/tty for them. This is important to | |
3569 | * ensure that when systemctl is started via | |
3570 | * popen() or a similar call that expects to | |
3571 | * read EOF we actually do generate EOF and | |
3572 | * not delay this indefinitely by because we | |
3573 | * keep an unused copy of stdin around. */ | |
3574 | fd = open("/dev/tty", O_WRONLY); | |
3575 | if (fd < 0) { | |
56f64d95 | 3576 | log_error_errno(errno, "Failed to open /dev/tty: %m"); |
6bb92a16 LP |
3577 | _exit(EXIT_FAILURE); |
3578 | } | |
3579 | ||
3580 | if (!stdout_is_tty) | |
3581 | dup2(fd, STDOUT_FILENO); | |
3582 | ||
3583 | if (!stderr_is_tty) | |
3584 | dup2(fd, STDERR_FILENO); | |
3585 | ||
3586 | if (fd > 2) | |
3587 | close(fd); | |
3588 | } | |
3589 | ||
3590 | /* Count arguments */ | |
3591 | va_start(ap, path); | |
3592 | for (n = 0; va_arg(ap, char*); n++) | |
3593 | ; | |
3594 | va_end(ap); | |
3595 | ||
3596 | /* Allocate strv */ | |
3597 | l = alloca(sizeof(char *) * (n + 1)); | |
3598 | ||
3599 | /* Fill in arguments */ | |
3600 | va_start(ap, path); | |
3601 | for (i = 0; i <= n; i++) | |
3602 | l[i] = va_arg(ap, char*); | |
3603 | va_end(ap); | |
3604 | ||
3605 | execv(path, l); | |
3606 | _exit(EXIT_FAILURE); | |
3607 | } | |
68faf98c LP |
3608 | |
3609 | int setrlimit_closest(int resource, const struct rlimit *rlim) { | |
3610 | struct rlimit highest, fixed; | |
3611 | ||
3612 | assert(rlim); | |
3613 | ||
3614 | if (setrlimit(resource, rlim) >= 0) | |
3615 | return 0; | |
3616 | ||
3617 | if (errno != EPERM) | |
3618 | return -errno; | |
3619 | ||
3620 | /* So we failed to set the desired setrlimit, then let's try | |
3621 | * to get as close as we can */ | |
3622 | assert_se(getrlimit(resource, &highest) == 0); | |
3623 | ||
3624 | fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max); | |
3625 | fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max); | |
3626 | ||
3627 | if (setrlimit(resource, &fixed) < 0) | |
3628 | return -errno; | |
3629 | ||
3630 | return 0; | |
3631 | } | |
3d9a4122 | 3632 | |
3d7415f4 LP |
3633 | bool http_etag_is_valid(const char *etag) { |
3634 | if (isempty(etag)) | |
3635 | return false; | |
3636 | ||
3637 | if (!endswith(etag, "\"")) | |
3638 | return false; | |
3639 | ||
3640 | if (!startswith(etag, "\"") && !startswith(etag, "W/\"")) | |
3641 | return false; | |
3642 | ||
3643 | return true; | |
3644 | } | |
3645 | ||
a2e03378 LP |
3646 | bool http_url_is_valid(const char *url) { |
3647 | const char *p; | |
49dbfa7b | 3648 | |
a2e03378 LP |
3649 | if (isempty(url)) |
3650 | return false; | |
49dbfa7b | 3651 | |
a2e03378 LP |
3652 | p = startswith(url, "http://"); |
3653 | if (!p) | |
3654 | p = startswith(url, "https://"); | |
3655 | if (!p) | |
3656 | return false; | |
49dbfa7b | 3657 | |
a2e03378 LP |
3658 | if (isempty(p)) |
3659 | return false; | |
49dbfa7b | 3660 | |
a2e03378 LP |
3661 | return ascii_is_valid(p); |
3662 | } | |
49dbfa7b | 3663 | |
a2e03378 LP |
3664 | bool documentation_url_is_valid(const char *url) { |
3665 | const char *p; | |
3666 | ||
3667 | if (isempty(url)) | |
3668 | return false; | |
3669 | ||
3670 | if (http_url_is_valid(url)) | |
49dbfa7b LP |
3671 | return true; |
3672 | ||
a2e03378 LP |
3673 | p = startswith(url, "file:/"); |
3674 | if (!p) | |
3675 | p = startswith(url, "info:"); | |
3676 | if (!p) | |
3677 | p = startswith(url, "man:"); | |
3678 | ||
3679 | if (isempty(p)) | |
3680 | return false; | |
3681 | ||
3682 | return ascii_is_valid(p); | |
49dbfa7b | 3683 | } |
9be346c9 HH |
3684 | |
3685 | bool in_initrd(void) { | |
73020ab2 | 3686 | static int saved = -1; |
825c6fe5 | 3687 | struct statfs s; |
8f33b5b8 | 3688 | |
825c6fe5 LP |
3689 | if (saved >= 0) |
3690 | return saved; | |
3691 | ||
3692 | /* We make two checks here: | |
3693 | * | |
3694 | * 1. the flag file /etc/initrd-release must exist | |
3695 | * 2. the root file system must be a memory file system | |
3696 | * | |
3697 | * The second check is extra paranoia, since misdetecting an | |
3698 | * initrd can have bad bad consequences due the initrd | |
3699 | * emptying when transititioning to the main systemd. | |
3700 | */ | |
3701 | ||
3702 | saved = access("/etc/initrd-release", F_OK) >= 0 && | |
3703 | statfs("/", &s) >= 0 && | |
943aad8c | 3704 | is_temporary_fs(&s); |
9be346c9 | 3705 | |
8f33b5b8 | 3706 | return saved; |
9be346c9 | 3707 | } |
069cfc85 | 3708 | |
7c5f152a | 3709 | int get_home_dir(char **_h) { |
2cfbd749 | 3710 | struct passwd *p; |
7c5f152a | 3711 | const char *e; |
2cfbd749 | 3712 | char *h; |
7c5f152a | 3713 | uid_t u; |
7c5f152a LP |
3714 | |
3715 | assert(_h); | |
3716 | ||
3717 | /* Take the user specified one */ | |
9a00f57a LP |
3718 | e = secure_getenv("HOME"); |
3719 | if (e && path_is_absolute(e)) { | |
7c5f152a LP |
3720 | h = strdup(e); |
3721 | if (!h) | |
3722 | return -ENOMEM; | |
3723 | ||
3724 | *_h = h; | |
3725 | return 0; | |
3726 | } | |
3727 | ||
3728 | /* Hardcode home directory for root to avoid NSS */ | |
3729 | u = getuid(); | |
3730 | if (u == 0) { | |
3731 | h = strdup("/root"); | |
3732 | if (!h) | |
3733 | return -ENOMEM; | |
3734 | ||
3735 | *_h = h; | |
3736 | return 0; | |
3737 | } | |
3738 | ||
3739 | /* Check the database... */ | |
3740 | errno = 0; | |
3741 | p = getpwuid(u); | |
3742 | if (!p) | |
bcb161b0 | 3743 | return errno > 0 ? -errno : -ESRCH; |
7c5f152a LP |
3744 | |
3745 | if (!path_is_absolute(p->pw_dir)) | |
3746 | return -EINVAL; | |
3747 | ||
3748 | h = strdup(p->pw_dir); | |
3749 | if (!h) | |
3750 | return -ENOMEM; | |
3751 | ||
3752 | *_h = h; | |
3753 | return 0; | |
3754 | } | |
3755 | ||
2cfbd749 LP |
3756 | int get_shell(char **_s) { |
3757 | struct passwd *p; | |
3758 | const char *e; | |
3759 | char *s; | |
3760 | uid_t u; | |
3761 | ||
3762 | assert(_s); | |
3763 | ||
3764 | /* Take the user specified one */ | |
3765 | e = getenv("SHELL"); | |
3766 | if (e) { | |
3767 | s = strdup(e); | |
3768 | if (!s) | |
3769 | return -ENOMEM; | |
3770 | ||
3771 | *_s = s; | |
3772 | return 0; | |
3773 | } | |
3774 | ||
3775 | /* Hardcode home directory for root to avoid NSS */ | |
3776 | u = getuid(); | |
3777 | if (u == 0) { | |
3778 | s = strdup("/bin/sh"); | |
3779 | if (!s) | |
3780 | return -ENOMEM; | |
3781 | ||
3782 | *_s = s; | |
3783 | return 0; | |
3784 | } | |
3785 | ||
3786 | /* Check the database... */ | |
3787 | errno = 0; | |
3788 | p = getpwuid(u); | |
3789 | if (!p) | |
3790 | return errno > 0 ? -errno : -ESRCH; | |
3791 | ||
3792 | if (!path_is_absolute(p->pw_shell)) | |
3793 | return -EINVAL; | |
3794 | ||
3795 | s = strdup(p->pw_shell); | |
3796 | if (!s) | |
3797 | return -ENOMEM; | |
3798 | ||
3799 | *_s = s; | |
3800 | return 0; | |
3801 | } | |
3802 | ||
ae6c3cc0 | 3803 | bool filename_is_valid(const char *p) { |
0b507b17 LP |
3804 | |
3805 | if (isempty(p)) | |
3806 | return false; | |
3807 | ||
3808 | if (strchr(p, '/')) | |
3809 | return false; | |
3810 | ||
3811 | if (streq(p, ".")) | |
3812 | return false; | |
3813 | ||
3814 | if (streq(p, "..")) | |
3815 | return false; | |
3816 | ||
3817 | if (strlen(p) > FILENAME_MAX) | |
3818 | return false; | |
3819 | ||
3820 | return true; | |
3821 | } | |
3822 | ||
3823 | bool string_is_safe(const char *p) { | |
3824 | const char *t; | |
3825 | ||
6294aa76 LP |
3826 | if (!p) |
3827 | return false; | |
0b507b17 LP |
3828 | |
3829 | for (t = p; *t; t++) { | |
01539d6e | 3830 | if (*t > 0 && *t < ' ') |
0b507b17 LP |
3831 | return false; |
3832 | ||
6294aa76 | 3833 | if (strchr("\\\"\'\0x7f", *t)) |
0b507b17 LP |
3834 | return false; |
3835 | } | |
3836 | ||
3837 | return true; | |
3838 | } | |
cfbc22ab | 3839 | |
ac4c8d6d | 3840 | /** |
6294aa76 LP |
3841 | * Check if a string contains control characters. If 'ok' is non-NULL |
3842 | * it may be a string containing additional CCs to be considered OK. | |
ac4c8d6d | 3843 | */ |
6294aa76 | 3844 | bool string_has_cc(const char *p, const char *ok) { |
4d1a6904 LP |
3845 | const char *t; |
3846 | ||
3847 | assert(p); | |
3848 | ||
3a8a9163 | 3849 | for (t = p; *t; t++) { |
6294aa76 | 3850 | if (ok && strchr(ok, *t)) |
1cb1767a | 3851 | continue; |
6294aa76 LP |
3852 | |
3853 | if (*t > 0 && *t < ' ') | |
4d1a6904 LP |
3854 | return true; |
3855 | ||
3a8a9163 LP |
3856 | if (*t == 127) |
3857 | return true; | |
3858 | } | |
3859 | ||
4d1a6904 LP |
3860 | return false; |
3861 | } | |
3862 | ||
e884315e LP |
3863 | bool path_is_safe(const char *p) { |
3864 | ||
3865 | if (isempty(p)) | |
3866 | return false; | |
3867 | ||
3868 | if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../")) | |
3869 | return false; | |
3870 | ||
6442185a | 3871 | if (strlen(p)+1 > PATH_MAX) |
e884315e LP |
3872 | return false; |
3873 | ||
3874 | /* The following two checks are not really dangerous, but hey, they still are confusing */ | |
3875 | if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./")) | |
3876 | return false; | |
3877 | ||
3878 | if (strstr(p, "//")) | |
3879 | return false; | |
3880 | ||
3881 | return true; | |
3882 | } | |
3883 | ||
a9e12476 KS |
3884 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
3885 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 3886 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
3887 | size_t l, u, idx; |
3888 | const void *p; | |
3889 | int comparison; | |
3890 | ||
3891 | l = 0; | |
3892 | u = nmemb; | |
3893 | while (l < u) { | |
3894 | idx = (l + u) / 2; | |
3895 | p = (void *)(((const char *) base) + (idx * size)); | |
3896 | comparison = compar(key, p, arg); | |
3897 | if (comparison < 0) | |
3898 | u = idx; | |
3899 | else if (comparison > 0) | |
3900 | l = idx + 1; | |
3901 | else | |
3902 | return (void *)p; | |
3903 | } | |
3904 | return NULL; | |
3905 | } | |
09017585 | 3906 | |
20f56fdd DR |
3907 | void init_gettext(void) { |
3908 | setlocale(LC_ALL, ""); | |
3909 | textdomain(GETTEXT_PACKAGE); | |
3910 | } | |
3911 | ||
09017585 MS |
3912 | bool is_locale_utf8(void) { |
3913 | const char *set; | |
3914 | static int cached_answer = -1; | |
3915 | ||
3916 | if (cached_answer >= 0) | |
3917 | goto out; | |
3918 | ||
3919 | if (!setlocale(LC_ALL, "")) { | |
3920 | cached_answer = true; | |
3921 | goto out; | |
3922 | } | |
3923 | ||
3924 | set = nl_langinfo(CODESET); | |
3925 | if (!set) { | |
3926 | cached_answer = true; | |
3927 | goto out; | |
3928 | } | |
3929 | ||
f168c273 | 3930 | if (streq(set, "UTF-8")) { |
fee79e01 HH |
3931 | cached_answer = true; |
3932 | goto out; | |
3933 | } | |
3934 | ||
6cf2f1d9 HH |
3935 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly |
3936 | * unset and everything can do to UTF-8 nowadays. */ | |
fee79e01 HH |
3937 | set = setlocale(LC_CTYPE, NULL); |
3938 | if (!set) { | |
3939 | cached_answer = true; | |
3940 | goto out; | |
3941 | } | |
3942 | ||
6cf2f1d9 HH |
3943 | /* Check result, but ignore the result if C was set |
3944 | * explicitly. */ | |
3945 | cached_answer = | |
3946 | streq(set, "C") && | |
3947 | !getenv("LC_ALL") && | |
3948 | !getenv("LC_CTYPE") && | |
3949 | !getenv("LANG"); | |
fee79e01 | 3950 | |
09017585 | 3951 | out: |
6cf2f1d9 | 3952 | return (bool) cached_answer; |
09017585 | 3953 | } |
c339d977 MS |
3954 | |
3955 | const char *draw_special_char(DrawSpecialChar ch) { | |
3956 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
6b01f1d3 | 3957 | |
c339d977 | 3958 | /* UTF-8 */ { |
6b01f1d3 | 3959 | [DRAW_TREE_VERTICAL] = "\342\224\202 ", /* │ */ |
45a5ff0d MS |
3960 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ |
3961 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
55c0b89c | 3962 | [DRAW_TREE_SPACE] = " ", /* */ |
6b01f1d3 LP |
3963 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243", /* ‣ */ |
3964 | [DRAW_BLACK_CIRCLE] = "\342\227\217", /* ● */ | |
3965 | [DRAW_ARROW] = "\342\206\222", /* → */ | |
13f8b8cb | 3966 | [DRAW_DASH] = "\342\200\223", /* – */ |
c339d977 | 3967 | }, |
6b01f1d3 | 3968 | |
c339d977 | 3969 | /* ASCII fallback */ { |
6b01f1d3 | 3970 | [DRAW_TREE_VERTICAL] = "| ", |
45a5ff0d MS |
3971 | [DRAW_TREE_BRANCH] = "|-", |
3972 | [DRAW_TREE_RIGHT] = "`-", | |
55c0b89c | 3973 | [DRAW_TREE_SPACE] = " ", |
6b01f1d3 LP |
3974 | [DRAW_TRIANGULAR_BULLET] = ">", |
3975 | [DRAW_BLACK_CIRCLE] = "*", | |
3976 | [DRAW_ARROW] = "->", | |
13f8b8cb | 3977 | [DRAW_DASH] = "-", |
c339d977 MS |
3978 | } |
3979 | }; | |
3980 | ||
3981 | return draw_table[!is_locale_utf8()][ch]; | |
3982 | } | |
409bc9c3 LP |
3983 | |
3984 | char *strreplace(const char *text, const char *old_string, const char *new_string) { | |
3985 | const char *f; | |
3986 | char *t, *r; | |
3987 | size_t l, old_len, new_len; | |
3988 | ||
3989 | assert(text); | |
3990 | assert(old_string); | |
3991 | assert(new_string); | |
3992 | ||
3993 | old_len = strlen(old_string); | |
3994 | new_len = strlen(new_string); | |
3995 | ||
3996 | l = strlen(text); | |
3997 | r = new(char, l+1); | |
3998 | if (!r) | |
3999 | return NULL; | |
4000 | ||
4001 | f = text; | |
4002 | t = r; | |
4003 | while (*f) { | |
4004 | char *a; | |
4005 | size_t d, nl; | |
4006 | ||
4007 | if (!startswith(f, old_string)) { | |
4008 | *(t++) = *(f++); | |
4009 | continue; | |
4010 | } | |
4011 | ||
4012 | d = t - r; | |
4013 | nl = l - old_len + new_len; | |
4014 | a = realloc(r, nl + 1); | |
4015 | if (!a) | |
4016 | goto oom; | |
4017 | ||
4018 | l = nl; | |
4019 | r = a; | |
4020 | t = r + d; | |
4021 | ||
4022 | t = stpcpy(t, new_string); | |
4023 | f += old_len; | |
4024 | } | |
4025 | ||
4026 | *t = 0; | |
4027 | return r; | |
4028 | ||
4029 | oom: | |
4030 | free(r); | |
4031 | return NULL; | |
4032 | } | |
e8bc0ea2 LP |
4033 | |
4034 | char *strip_tab_ansi(char **ibuf, size_t *_isz) { | |
660ddc72 | 4035 | const char *i, *begin = NULL; |
e8bc0ea2 LP |
4036 | enum { |
4037 | STATE_OTHER, | |
4038 | STATE_ESCAPE, | |
4039 | STATE_BRACKET | |
4040 | } state = STATE_OTHER; | |
4041 | char *obuf = NULL; | |
4042 | size_t osz = 0, isz; | |
4043 | FILE *f; | |
4044 | ||
4045 | assert(ibuf); | |
4046 | assert(*ibuf); | |
4047 | ||
4048 | /* Strips ANSI color and replaces TABs by 8 spaces */ | |
4049 | ||
4050 | isz = _isz ? *_isz : strlen(*ibuf); | |
4051 | ||
4052 | f = open_memstream(&obuf, &osz); | |
4053 | if (!f) | |
4054 | return NULL; | |
4055 | ||
4056 | for (i = *ibuf; i < *ibuf + isz + 1; i++) { | |
4057 | ||
4058 | switch (state) { | |
4059 | ||
4060 | case STATE_OTHER: | |
4061 | if (i >= *ibuf + isz) /* EOT */ | |
4062 | break; | |
4063 | else if (*i == '\x1B') | |
4064 | state = STATE_ESCAPE; | |
4065 | else if (*i == '\t') | |
4066 | fputs(" ", f); | |
4067 | else | |
4068 | fputc(*i, f); | |
4069 | break; | |
4070 | ||
4071 | case STATE_ESCAPE: | |
4072 | if (i >= *ibuf + isz) { /* EOT */ | |
4073 | fputc('\x1B', f); | |
4074 | break; | |
4075 | } else if (*i == '[') { | |
4076 | state = STATE_BRACKET; | |
4077 | begin = i + 1; | |
4078 | } else { | |
4079 | fputc('\x1B', f); | |
4080 | fputc(*i, f); | |
4081 | state = STATE_OTHER; | |
4082 | } | |
4083 | ||
4084 | break; | |
4085 | ||
4086 | case STATE_BRACKET: | |
4087 | ||
4088 | if (i >= *ibuf + isz || /* EOT */ | |
4089 | (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) { | |
4090 | fputc('\x1B', f); | |
4091 | fputc('[', f); | |
4092 | state = STATE_OTHER; | |
4093 | i = begin-1; | |
4094 | } else if (*i == 'm') | |
4095 | state = STATE_OTHER; | |
4096 | break; | |
4097 | } | |
4098 | } | |
4099 | ||
4100 | if (ferror(f)) { | |
4101 | fclose(f); | |
4102 | free(obuf); | |
4103 | return NULL; | |
4104 | } | |
4105 | ||
4106 | fclose(f); | |
4107 | ||
4108 | free(*ibuf); | |
4109 | *ibuf = obuf; | |
4110 | ||
4111 | if (_isz) | |
4112 | *_isz = osz; | |
4113 | ||
4114 | return obuf; | |
4115 | } | |
240dbaa4 LP |
4116 | |
4117 | int on_ac_power(void) { | |
4118 | bool found_offline = false, found_online = false; | |
4119 | _cleanup_closedir_ DIR *d = NULL; | |
4120 | ||
4121 | d = opendir("/sys/class/power_supply"); | |
4122 | if (!d) | |
6d890034 | 4123 | return errno == ENOENT ? true : -errno; |
240dbaa4 LP |
4124 | |
4125 | for (;;) { | |
4126 | struct dirent *de; | |
240dbaa4 LP |
4127 | _cleanup_close_ int fd = -1, device = -1; |
4128 | char contents[6]; | |
4129 | ssize_t n; | |
240dbaa4 | 4130 | |
3fd11280 FW |
4131 | errno = 0; |
4132 | de = readdir(d); | |
4133 | if (!de && errno != 0) | |
4134 | return -errno; | |
240dbaa4 LP |
4135 | |
4136 | if (!de) | |
4137 | break; | |
4138 | ||
a34bf9db | 4139 | if (hidden_file(de->d_name)) |
240dbaa4 LP |
4140 | continue; |
4141 | ||
4142 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4143 | if (device < 0) { | |
4144 | if (errno == ENOENT || errno == ENOTDIR) | |
4145 | continue; | |
4146 | ||
4147 | return -errno; | |
4148 | } | |
4149 | ||
4150 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
4151 | if (fd < 0) { | |
4152 | if (errno == ENOENT) | |
4153 | continue; | |
4154 | ||
4155 | return -errno; | |
4156 | } | |
4157 | ||
4158 | n = read(fd, contents, sizeof(contents)); | |
4159 | if (n < 0) | |
4160 | return -errno; | |
4161 | ||
4162 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
4163 | continue; | |
4164 | ||
03e334a1 | 4165 | safe_close(fd); |
240dbaa4 LP |
4166 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
4167 | if (fd < 0) { | |
4168 | if (errno == ENOENT) | |
4169 | continue; | |
4170 | ||
4171 | return -errno; | |
4172 | } | |
4173 | ||
4174 | n = read(fd, contents, sizeof(contents)); | |
4175 | if (n < 0) | |
4176 | return -errno; | |
4177 | ||
4178 | if (n != 2 || contents[1] != '\n') | |
4179 | return -EIO; | |
4180 | ||
4181 | if (contents[0] == '1') { | |
4182 | found_online = true; | |
4183 | break; | |
4184 | } else if (contents[0] == '0') | |
4185 | found_offline = true; | |
4186 | else | |
4187 | return -EIO; | |
4188 | } | |
4189 | ||
4190 | return found_online || !found_offline; | |
4191 | } | |
fabe5c0e | 4192 | |
4cf7ea55 | 4193 | static int search_and_fopen_internal(const char *path, const char *mode, const char *root, char **search, FILE **_f) { |
fabe5c0e LP |
4194 | char **i; |
4195 | ||
4196 | assert(path); | |
4197 | assert(mode); | |
4198 | assert(_f); | |
4199 | ||
7d8da2c9 | 4200 | if (!path_strv_resolve_uniq(search, root)) |
fabe5c0e LP |
4201 | return -ENOMEM; |
4202 | ||
4203 | STRV_FOREACH(i, search) { | |
4204 | _cleanup_free_ char *p = NULL; | |
4205 | FILE *f; | |
4206 | ||
375eadd9 MM |
4207 | if (root) |
4208 | p = strjoin(root, *i, "/", path, NULL); | |
4209 | else | |
4210 | p = strjoin(*i, "/", path, NULL); | |
fabe5c0e LP |
4211 | if (!p) |
4212 | return -ENOMEM; | |
4213 | ||
4214 | f = fopen(p, mode); | |
4215 | if (f) { | |
4216 | *_f = f; | |
4217 | return 0; | |
4218 | } | |
4219 | ||
4220 | if (errno != ENOENT) | |
4221 | return -errno; | |
4222 | } | |
4223 | ||
4224 | return -ENOENT; | |
4225 | } | |
4226 | ||
4cf7ea55 | 4227 | int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f) { |
fabe5c0e LP |
4228 | _cleanup_strv_free_ char **copy = NULL; |
4229 | ||
4230 | assert(path); | |
4231 | assert(mode); | |
4232 | assert(_f); | |
4233 | ||
4234 | if (path_is_absolute(path)) { | |
4235 | FILE *f; | |
4236 | ||
4237 | f = fopen(path, mode); | |
4238 | if (f) { | |
4239 | *_f = f; | |
4240 | return 0; | |
4241 | } | |
4242 | ||
4243 | return -errno; | |
4244 | } | |
4245 | ||
4246 | copy = strv_copy((char**) search); | |
4247 | if (!copy) | |
4248 | return -ENOMEM; | |
4249 | ||
4cf7ea55 | 4250 | return search_and_fopen_internal(path, mode, root, copy, _f); |
fabe5c0e LP |
4251 | } |
4252 | ||
4cf7ea55 | 4253 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f) { |
fabe5c0e LP |
4254 | _cleanup_strv_free_ char **s = NULL; |
4255 | ||
4256 | if (path_is_absolute(path)) { | |
4257 | FILE *f; | |
4258 | ||
4259 | f = fopen(path, mode); | |
4260 | if (f) { | |
4261 | *_f = f; | |
4262 | return 0; | |
4263 | } | |
4264 | ||
4265 | return -errno; | |
4266 | } | |
4267 | ||
4268 | s = strv_split_nulstr(search); | |
4269 | if (!s) | |
4270 | return -ENOMEM; | |
4271 | ||
4cf7ea55 | 4272 | return search_and_fopen_internal(path, mode, root, s, _f); |
fabe5c0e | 4273 | } |
c17ec25e | 4274 | |
66e35261 LP |
4275 | char *strextend(char **x, ...) { |
4276 | va_list ap; | |
4277 | size_t f, l; | |
4278 | char *r, *p; | |
4279 | ||
4280 | assert(x); | |
4281 | ||
4282 | l = f = *x ? strlen(*x) : 0; | |
4283 | ||
4284 | va_start(ap, x); | |
4285 | for (;;) { | |
4286 | const char *t; | |
4287 | size_t n; | |
4288 | ||
4289 | t = va_arg(ap, const char *); | |
4290 | if (!t) | |
4291 | break; | |
4292 | ||
4293 | n = strlen(t); | |
4294 | if (n > ((size_t) -1) - l) { | |
4295 | va_end(ap); | |
4296 | return NULL; | |
4297 | } | |
4298 | ||
4299 | l += n; | |
4300 | } | |
4301 | va_end(ap); | |
4302 | ||
4303 | r = realloc(*x, l+1); | |
4304 | if (!r) | |
4305 | return NULL; | |
4306 | ||
4307 | p = r + f; | |
4308 | ||
4309 | va_start(ap, x); | |
4310 | for (;;) { | |
4311 | const char *t; | |
4312 | ||
4313 | t = va_arg(ap, const char *); | |
4314 | if (!t) | |
4315 | break; | |
4316 | ||
4317 | p = stpcpy(p, t); | |
4318 | } | |
4319 | va_end(ap); | |
4320 | ||
4321 | *p = 0; | |
4322 | *x = r; | |
4323 | ||
4324 | return r + l; | |
4325 | } | |
9a17484d LP |
4326 | |
4327 | char *strrep(const char *s, unsigned n) { | |
4328 | size_t l; | |
4329 | char *r, *p; | |
4330 | unsigned i; | |
4331 | ||
4332 | assert(s); | |
4333 | ||
4334 | l = strlen(s); | |
4335 | p = r = malloc(l * n + 1); | |
4336 | if (!r) | |
4337 | return NULL; | |
4338 | ||
4339 | for (i = 0; i < n; i++) | |
4340 | p = stpcpy(p, s); | |
4341 | ||
4342 | *p = 0; | |
4343 | return r; | |
4344 | } | |
392d5b37 | 4345 | |
ca2d3784 ZJS |
4346 | void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) { |
4347 | size_t a, newalloc; | |
392d5b37 LP |
4348 | void *q; |
4349 | ||
98088803 | 4350 | assert(p); |
e93c33d4 SL |
4351 | assert(allocated); |
4352 | ||
392d5b37 LP |
4353 | if (*allocated >= need) |
4354 | return *p; | |
4355 | ||
ca2d3784 ZJS |
4356 | newalloc = MAX(need * 2, 64u / size); |
4357 | a = newalloc * size; | |
98088803 LP |
4358 | |
4359 | /* check for overflows */ | |
ca2d3784 | 4360 | if (a < size * need) |
98088803 LP |
4361 | return NULL; |
4362 | ||
392d5b37 LP |
4363 | q = realloc(*p, a); |
4364 | if (!q) | |
4365 | return NULL; | |
4366 | ||
4367 | *p = q; | |
ca2d3784 | 4368 | *allocated = newalloc; |
392d5b37 LP |
4369 | return q; |
4370 | } | |
aa96c6cb | 4371 | |
ca2d3784 | 4372 | void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) { |
98088803 | 4373 | size_t prev; |
4545a231 DH |
4374 | uint8_t *q; |
4375 | ||
98088803 LP |
4376 | assert(p); |
4377 | assert(allocated); | |
4378 | ||
4379 | prev = *allocated; | |
4380 | ||
ca2d3784 | 4381 | q = greedy_realloc(p, allocated, need, size); |
4545a231 DH |
4382 | if (!q) |
4383 | return NULL; | |
4384 | ||
4385 | if (*allocated > prev) | |
ca2d3784 | 4386 | memzero(q + prev * size, (*allocated - prev) * size); |
4545a231 DH |
4387 | |
4388 | return q; | |
4389 | } | |
4390 | ||
aa96c6cb LP |
4391 | bool id128_is_valid(const char *s) { |
4392 | size_t i, l; | |
4393 | ||
4394 | l = strlen(s); | |
4395 | if (l == 32) { | |
4396 | ||
4397 | /* Simple formatted 128bit hex string */ | |
4398 | ||
4399 | for (i = 0; i < l; i++) { | |
4400 | char c = s[i]; | |
4401 | ||
4402 | if (!(c >= '0' && c <= '9') && | |
4403 | !(c >= 'a' && c <= 'z') && | |
4404 | !(c >= 'A' && c <= 'Z')) | |
4405 | return false; | |
4406 | } | |
4407 | ||
4408 | } else if (l == 36) { | |
4409 | ||
4410 | /* Formatted UUID */ | |
4411 | ||
4412 | for (i = 0; i < l; i++) { | |
4413 | char c = s[i]; | |
4414 | ||
4415 | if ((i == 8 || i == 13 || i == 18 || i == 23)) { | |
4416 | if (c != '-') | |
4417 | return false; | |
4418 | } else { | |
4419 | if (!(c >= '0' && c <= '9') && | |
4420 | !(c >= 'a' && c <= 'z') && | |
4421 | !(c >= 'A' && c <= 'Z')) | |
4422 | return false; | |
4423 | } | |
4424 | } | |
4425 | ||
4426 | } else | |
4427 | return false; | |
4428 | ||
4429 | return true; | |
4430 | } | |
7085053a | 4431 | |
d4ac85c6 LP |
4432 | int split_pair(const char *s, const char *sep, char **l, char **r) { |
4433 | char *x, *a, *b; | |
4434 | ||
4435 | assert(s); | |
4436 | assert(sep); | |
4437 | assert(l); | |
4438 | assert(r); | |
4439 | ||
4440 | if (isempty(sep)) | |
4441 | return -EINVAL; | |
4442 | ||
4443 | x = strstr(s, sep); | |
4444 | if (!x) | |
4445 | return -EINVAL; | |
4446 | ||
4447 | a = strndup(s, x - s); | |
4448 | if (!a) | |
4449 | return -ENOMEM; | |
4450 | ||
4451 | b = strdup(x + strlen(sep)); | |
4452 | if (!b) { | |
4453 | free(a); | |
4454 | return -ENOMEM; | |
4455 | } | |
4456 | ||
4457 | *l = a; | |
4458 | *r = b; | |
4459 | ||
4460 | return 0; | |
4461 | } | |
295edddf | 4462 | |
74df0fca | 4463 | int shall_restore_state(void) { |
1a299299 | 4464 | _cleanup_free_ char *value = NULL; |
74df0fca | 4465 | int r; |
295edddf | 4466 | |
1a299299 | 4467 | r = get_proc_cmdline_key("systemd.restore_state=", &value); |
74df0fca LP |
4468 | if (r < 0) |
4469 | return r; | |
1a299299 LP |
4470 | if (r == 0) |
4471 | return true; | |
295edddf | 4472 | |
1a299299 | 4473 | return parse_boolean(value) != 0; |
74df0fca LP |
4474 | } |
4475 | ||
4476 | int proc_cmdline(char **ret) { | |
b5884878 | 4477 | assert(ret); |
295edddf | 4478 | |
b5884878 LP |
4479 | if (detect_container(NULL) > 0) |
4480 | return get_process_cmdline(1, 0, false, ret); | |
4481 | else | |
4482 | return read_one_line_file("/proc/cmdline", ret); | |
295edddf | 4483 | } |
bc9fd78c | 4484 | |
059cb385 | 4485 | int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) { |
141a79f4 | 4486 | _cleanup_free_ char *line = NULL; |
f32d2db1 | 4487 | const char *p; |
141a79f4 ZJS |
4488 | int r; |
4489 | ||
059cb385 LP |
4490 | assert(parse_item); |
4491 | ||
141a79f4 ZJS |
4492 | r = proc_cmdline(&line); |
4493 | if (r < 0) | |
b5884878 | 4494 | return r; |
141a79f4 | 4495 | |
f32d2db1 LP |
4496 | p = line; |
4497 | for (;;) { | |
4498 | _cleanup_free_ char *word = NULL; | |
4499 | char *value = NULL; | |
141a79f4 | 4500 | |
4034a06d | 4501 | r = unquote_first_word(&p, &word, UNQUOTE_RELAX); |
f32d2db1 LP |
4502 | if (r < 0) |
4503 | return r; | |
4504 | if (r == 0) | |
4505 | break; | |
141a79f4 | 4506 | |
059cb385 LP |
4507 | /* Filter out arguments that are intended only for the |
4508 | * initrd */ | |
4509 | if (!in_initrd() && startswith(word, "rd.")) | |
4510 | continue; | |
4511 | ||
4512 | value = strchr(word, '='); | |
4513 | if (value) | |
4514 | *(value++) = 0; | |
4515 | ||
4516 | r = parse_item(word, value); | |
4517 | if (r < 0) | |
141a79f4 | 4518 | return r; |
141a79f4 ZJS |
4519 | } |
4520 | ||
4521 | return 0; | |
4522 | } | |
4523 | ||
1a299299 LP |
4524 | int get_proc_cmdline_key(const char *key, char **value) { |
4525 | _cleanup_free_ char *line = NULL, *ret = NULL; | |
4526 | bool found = false; | |
4527 | const char *p; | |
4528 | int r; | |
4529 | ||
4530 | assert(key); | |
4531 | ||
4532 | r = proc_cmdline(&line); | |
4533 | if (r < 0) | |
4534 | return r; | |
4535 | ||
4536 | p = line; | |
4537 | for (;;) { | |
4538 | _cleanup_free_ char *word = NULL; | |
4539 | const char *e; | |
4540 | ||
4034a06d | 4541 | r = unquote_first_word(&p, &word, UNQUOTE_RELAX); |
1a299299 LP |
4542 | if (r < 0) |
4543 | return r; | |
4544 | if (r == 0) | |
4545 | break; | |
4546 | ||
4547 | /* Filter out arguments that are intended only for the | |
4548 | * initrd */ | |
4549 | if (!in_initrd() && startswith(word, "rd.")) | |
4550 | continue; | |
4551 | ||
4552 | if (value) { | |
4553 | e = startswith(word, key); | |
4554 | if (!e) | |
4555 | continue; | |
4556 | ||
4557 | r = free_and_strdup(&ret, e); | |
4558 | if (r < 0) | |
4559 | return r; | |
4560 | ||
4561 | found = true; | |
4562 | } else { | |
4563 | if (streq(word, key)) | |
4564 | found = true; | |
4565 | } | |
4566 | } | |
4567 | ||
4568 | if (value) { | |
4569 | *value = ret; | |
4570 | ret = NULL; | |
4571 | } | |
4572 | ||
4573 | return found; | |
4574 | ||
4575 | } | |
4576 | ||
bc9fd78c LP |
4577 | int container_get_leader(const char *machine, pid_t *pid) { |
4578 | _cleanup_free_ char *s = NULL, *class = NULL; | |
4579 | const char *p; | |
4580 | pid_t leader; | |
4581 | int r; | |
4582 | ||
4583 | assert(machine); | |
4584 | assert(pid); | |
4585 | ||
63c372cb | 4586 | p = strjoina("/run/systemd/machines/", machine); |
bc9fd78c LP |
4587 | r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); |
4588 | if (r == -ENOENT) | |
4589 | return -EHOSTDOWN; | |
4590 | if (r < 0) | |
4591 | return r; | |
4592 | if (!s) | |
4593 | return -EIO; | |
4594 | ||
4595 | if (!streq_ptr(class, "container")) | |
4596 | return -EIO; | |
4597 | ||
4598 | r = parse_pid(s, &leader); | |
4599 | if (r < 0) | |
4600 | return r; | |
4601 | if (leader <= 1) | |
4602 | return -EIO; | |
4603 | ||
4604 | *pid = leader; | |
4605 | return 0; | |
4606 | } | |
4607 | ||
878cd7e9 LP |
4608 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd) { |
4609 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1; | |
359a06aa | 4610 | int rfd = -1; |
bc9fd78c LP |
4611 | |
4612 | assert(pid >= 0); | |
bc9fd78c | 4613 | |
878cd7e9 LP |
4614 | if (mntns_fd) { |
4615 | const char *mntns; | |
a4475f57 | 4616 | |
878cd7e9 LP |
4617 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
4618 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
4619 | if (mntnsfd < 0) | |
4620 | return -errno; | |
4621 | } | |
bc9fd78c | 4622 | |
878cd7e9 LP |
4623 | if (pidns_fd) { |
4624 | const char *pidns; | |
4625 | ||
4626 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
4627 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
4628 | if (pidnsfd < 0) | |
4629 | return -errno; | |
4630 | } | |
4631 | ||
4632 | if (netns_fd) { | |
4633 | const char *netns; | |
4634 | ||
4635 | netns = procfs_file_alloca(pid, "ns/net"); | |
4636 | netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
4637 | if (netnsfd < 0) | |
4638 | return -errno; | |
4639 | } | |
4640 | ||
4641 | if (root_fd) { | |
4642 | const char *root; | |
4643 | ||
4644 | root = procfs_file_alloca(pid, "root"); | |
4645 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
4646 | if (rfd < 0) | |
4647 | return -errno; | |
4648 | } | |
4649 | ||
4650 | if (pidns_fd) | |
4651 | *pidns_fd = pidnsfd; | |
bc9fd78c | 4652 | |
878cd7e9 LP |
4653 | if (mntns_fd) |
4654 | *mntns_fd = mntnsfd; | |
4655 | ||
4656 | if (netns_fd) | |
4657 | *netns_fd = netnsfd; | |
4658 | ||
4659 | if (root_fd) | |
4660 | *root_fd = rfd; | |
4661 | ||
4662 | pidnsfd = mntnsfd = netnsfd = -1; | |
bc9fd78c LP |
4663 | |
4664 | return 0; | |
4665 | } | |
4666 | ||
878cd7e9 | 4667 | int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd) { |
bc9fd78c | 4668 | |
878cd7e9 LP |
4669 | if (pidns_fd >= 0) |
4670 | if (setns(pidns_fd, CLONE_NEWPID) < 0) | |
4671 | return -errno; | |
a4475f57 | 4672 | |
878cd7e9 LP |
4673 | if (mntns_fd >= 0) |
4674 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
4675 | return -errno; | |
bc9fd78c | 4676 | |
878cd7e9 LP |
4677 | if (netns_fd >= 0) |
4678 | if (setns(netns_fd, CLONE_NEWNET) < 0) | |
4679 | return -errno; | |
bc9fd78c | 4680 | |
878cd7e9 LP |
4681 | if (root_fd >= 0) { |
4682 | if (fchdir(root_fd) < 0) | |
4683 | return -errno; | |
4684 | ||
4685 | if (chroot(".") < 0) | |
4686 | return -errno; | |
4687 | } | |
bc9fd78c | 4688 | |
b4da6d6b | 4689 | return reset_uid_gid(); |
bc9fd78c | 4690 | } |
bf108e55 | 4691 | |
eff05270 LP |
4692 | int getpeercred(int fd, struct ucred *ucred) { |
4693 | socklen_t n = sizeof(struct ucred); | |
4694 | struct ucred u; | |
4695 | int r; | |
4696 | ||
4697 | assert(fd >= 0); | |
4698 | assert(ucred); | |
4699 | ||
4700 | r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &u, &n); | |
4701 | if (r < 0) | |
4702 | return -errno; | |
4703 | ||
4704 | if (n != sizeof(struct ucred)) | |
4705 | return -EIO; | |
4706 | ||
4707 | /* Check if the data is actually useful and not suppressed due | |
4708 | * to namespacing issues */ | |
4709 | if (u.pid <= 0) | |
4710 | return -ENODATA; | |
fed1e721 | 4711 | if (u.uid == UID_INVALID) |
62028d9c | 4712 | return -ENODATA; |
fed1e721 | 4713 | if (u.gid == GID_INVALID) |
62028d9c | 4714 | return -ENODATA; |
eff05270 LP |
4715 | |
4716 | *ucred = u; | |
4717 | return 0; | |
4718 | } | |
4719 | ||
4720 | int getpeersec(int fd, char **ret) { | |
4721 | socklen_t n = 64; | |
4722 | char *s; | |
4723 | int r; | |
4724 | ||
4725 | assert(fd >= 0); | |
4726 | assert(ret); | |
4727 | ||
4728 | s = new0(char, n); | |
4729 | if (!s) | |
4730 | return -ENOMEM; | |
4731 | ||
4732 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
4733 | if (r < 0) { | |
4734 | free(s); | |
4735 | ||
4736 | if (errno != ERANGE) | |
4737 | return -errno; | |
4738 | ||
4739 | s = new0(char, n); | |
4740 | if (!s) | |
4741 | return -ENOMEM; | |
4742 | ||
4743 | r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n); | |
4744 | if (r < 0) { | |
4745 | free(s); | |
4746 | return -errno; | |
4747 | } | |
4748 | } | |
4749 | ||
ae98841e LP |
4750 | if (isempty(s)) { |
4751 | free(s); | |
15411c0c | 4752 | return -EOPNOTSUPP; |
ae98841e LP |
4753 | } |
4754 | ||
eff05270 LP |
4755 | *ret = s; |
4756 | return 0; | |
4757 | } | |
8e33886e | 4758 | |
0f010ef2 | 4759 | /* This is much like like mkostemp() but is subject to umask(). */ |
65b3903f | 4760 | int mkostemp_safe(char *pattern, int flags) { |
2d5bdf5b | 4761 | _cleanup_umask_ mode_t u; |
0f010ef2 | 4762 | int fd; |
65b3903f | 4763 | |
d37a91e8 | 4764 | assert(pattern); |
65b3903f | 4765 | |
2d5bdf5b LP |
4766 | u = umask(077); |
4767 | ||
0f010ef2 ZJS |
4768 | fd = mkostemp(pattern, flags); |
4769 | if (fd < 0) | |
4770 | return -errno; | |
65b3903f | 4771 | |
0f010ef2 | 4772 | return fd; |
65b3903f ZJS |
4773 | } |
4774 | ||
8e33886e | 4775 | int open_tmpfile(const char *path, int flags) { |
8e33886e | 4776 | char *p; |
a6afc4ae LP |
4777 | int fd; |
4778 | ||
4779 | assert(path); | |
8e33886e ZJS |
4780 | |
4781 | #ifdef O_TMPFILE | |
7736202c | 4782 | /* Try O_TMPFILE first, if it is supported */ |
a765f344 | 4783 | fd = open(path, flags|O_TMPFILE|O_EXCL, S_IRUSR|S_IWUSR); |
8e33886e ZJS |
4784 | if (fd >= 0) |
4785 | return fd; | |
4786 | #endif | |
7736202c LP |
4787 | |
4788 | /* Fall back to unguessable name + unlinking */ | |
63c372cb | 4789 | p = strjoina(path, "/systemd-tmp-XXXXXX"); |
8e33886e | 4790 | |
a6afc4ae | 4791 | fd = mkostemp_safe(p, flags); |
8e33886e | 4792 | if (fd < 0) |
65b3903f | 4793 | return fd; |
8e33886e ZJS |
4794 | |
4795 | unlink(p); | |
4796 | return fd; | |
4797 | } | |
fdb9161c LP |
4798 | |
4799 | int fd_warn_permissions(const char *path, int fd) { | |
4800 | struct stat st; | |
4801 | ||
4802 | if (fstat(fd, &st) < 0) | |
4803 | return -errno; | |
4804 | ||
4805 | if (st.st_mode & 0111) | |
4806 | log_warning("Configuration file %s is marked executable. Please remove executable permission bits. Proceeding anyway.", path); | |
4807 | ||
4808 | if (st.st_mode & 0002) | |
4809 | log_warning("Configuration file %s is marked world-writable. Please remove world writability permission bits. Proceeding anyway.", path); | |
4810 | ||
4811 | if (getpid() == 1 && (st.st_mode & 0044) != 0044) | |
4812 | 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); | |
4813 | ||
4814 | return 0; | |
4815 | } | |
6afc95b7 | 4816 | |
ac45f971 | 4817 | unsigned long personality_from_string(const char *p) { |
6afc95b7 LP |
4818 | |
4819 | /* Parse a personality specifier. We introduce our own | |
4820 | * identifiers that indicate specific ABIs, rather than just | |
4821 | * hints regarding the register size, since we want to keep | |
4822 | * things open for multiple locally supported ABIs for the | |
4823 | * same register size. We try to reuse the ABI identifiers | |
4824 | * used by libseccomp. */ | |
4825 | ||
4826 | #if defined(__x86_64__) | |
4827 | ||
4828 | if (streq(p, "x86")) | |
4829 | return PER_LINUX32; | |
4830 | ||
4831 | if (streq(p, "x86-64")) | |
4832 | return PER_LINUX; | |
4833 | ||
4834 | #elif defined(__i386__) | |
4835 | ||
4836 | if (streq(p, "x86")) | |
4837 | return PER_LINUX; | |
4838 | #endif | |
4839 | ||
4840 | /* personality(7) documents that 0xffffffffUL is used for | |
4841 | * querying the current personality, hence let's use that here | |
4842 | * as error indicator. */ | |
4843 | return 0xffffffffUL; | |
4844 | } | |
ac45f971 LP |
4845 | |
4846 | const char* personality_to_string(unsigned long p) { | |
4847 | ||
4848 | #if defined(__x86_64__) | |
4849 | ||
4850 | if (p == PER_LINUX32) | |
4851 | return "x86"; | |
4852 | ||
4853 | if (p == PER_LINUX) | |
4854 | return "x86-64"; | |
4855 | ||
4856 | #elif defined(__i386__) | |
4857 | ||
4858 | if (p == PER_LINUX) | |
4859 | return "x86"; | |
4860 | #endif | |
4861 | ||
4862 | return NULL; | |
4863 | } | |
1c231f56 LP |
4864 | |
4865 | uint64_t physical_memory(void) { | |
4866 | long mem; | |
4867 | ||
4868 | /* We return this as uint64_t in case we are running as 32bit | |
4869 | * process on a 64bit kernel with huge amounts of memory */ | |
4870 | ||
4871 | mem = sysconf(_SC_PHYS_PAGES); | |
4872 | assert(mem > 0); | |
4873 | ||
4874 | return (uint64_t) mem * (uint64_t) page_size(); | |
4875 | } | |
6db615c1 | 4876 | |
29bfbcd6 LP |
4877 | void hexdump(FILE *f, const void *p, size_t s) { |
4878 | const uint8_t *b = p; | |
4879 | unsigned n = 0; | |
4880 | ||
4881 | assert(s == 0 || b); | |
4882 | ||
4883 | while (s > 0) { | |
4884 | size_t i; | |
4885 | ||
4886 | fprintf(f, "%04x ", n); | |
4887 | ||
4888 | for (i = 0; i < 16; i++) { | |
4889 | ||
4890 | if (i >= s) | |
4891 | fputs(" ", f); | |
4892 | else | |
4893 | fprintf(f, "%02x ", b[i]); | |
4894 | ||
4895 | if (i == 7) | |
4896 | fputc(' ', f); | |
4897 | } | |
4898 | ||
4899 | fputc(' ', f); | |
4900 | ||
4901 | for (i = 0; i < 16; i++) { | |
4902 | ||
4903 | if (i >= s) | |
4904 | fputc(' ', f); | |
4905 | else | |
4906 | fputc(isprint(b[i]) ? (char) b[i] : '.', f); | |
4907 | } | |
4908 | ||
4909 | fputc('\n', f); | |
4910 | ||
4911 | if (s < 16) | |
4912 | break; | |
4913 | ||
4914 | n += 16; | |
4915 | b += 16; | |
4916 | s -= 16; | |
4917 | } | |
4918 | } | |
c5220a94 | 4919 | |
966bff26 | 4920 | int update_reboot_param_file(const char *param) { |
c5220a94 MO |
4921 | int r = 0; |
4922 | ||
4923 | if (param) { | |
4924 | ||
4925 | r = write_string_file(REBOOT_PARAM_FILE, param); | |
4926 | if (r < 0) | |
4927 | log_error("Failed to write reboot param to " | |
4928 | REBOOT_PARAM_FILE": %s", strerror(-r)); | |
4929 | } else | |
4930 | unlink(REBOOT_PARAM_FILE); | |
4931 | ||
4932 | return r; | |
4933 | } | |
6d313367 LP |
4934 | |
4935 | int umount_recursive(const char *prefix, int flags) { | |
4936 | bool again; | |
4937 | int n = 0, r; | |
4938 | ||
4939 | /* Try to umount everything recursively below a | |
4940 | * directory. Also, take care of stacked mounts, and keep | |
4941 | * unmounting them until they are gone. */ | |
4942 | ||
4943 | do { | |
4944 | _cleanup_fclose_ FILE *proc_self_mountinfo = NULL; | |
4945 | ||
4946 | again = false; | |
4947 | r = 0; | |
4948 | ||
4949 | proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"); | |
4950 | if (!proc_self_mountinfo) | |
4951 | return -errno; | |
4952 | ||
4953 | for (;;) { | |
4954 | _cleanup_free_ char *path = NULL, *p = NULL; | |
4955 | int k; | |
4956 | ||
4957 | k = fscanf(proc_self_mountinfo, | |
4958 | "%*s " /* (1) mount id */ | |
4959 | "%*s " /* (2) parent id */ | |
4960 | "%*s " /* (3) major:minor */ | |
4961 | "%*s " /* (4) root */ | |
4962 | "%ms " /* (5) mount point */ | |
4963 | "%*s" /* (6) mount options */ | |
4964 | "%*[^-]" /* (7) optional fields */ | |
4965 | "- " /* (8) separator */ | |
4966 | "%*s " /* (9) file system type */ | |
4967 | "%*s" /* (10) mount source */ | |
4968 | "%*s" /* (11) mount options 2 */ | |
4969 | "%*[^\n]", /* some rubbish at the end */ | |
4970 | &path); | |
6d313367 LP |
4971 | if (k != 1) { |
4972 | if (k == EOF) | |
4973 | break; | |
4974 | ||
4975 | continue; | |
4976 | } | |
4977 | ||
527b7a42 LP |
4978 | r = cunescape(path, UNESCAPE_RELAX, &p); |
4979 | if (r < 0) | |
4980 | return r; | |
6d313367 LP |
4981 | |
4982 | if (!path_startswith(p, prefix)) | |
4983 | continue; | |
4984 | ||
4985 | if (umount2(p, flags) < 0) { | |
4986 | r = -errno; | |
4987 | continue; | |
4988 | } | |
4989 | ||
4990 | again = true; | |
4991 | n++; | |
4992 | ||
4993 | break; | |
4994 | } | |
4995 | ||
4996 | } while (again); | |
4997 | ||
4998 | return r ? r : n; | |
4999 | } | |
d6797c92 | 5000 | |
abe4aa14 TM |
5001 | static int get_mount_flags(const char *path, unsigned long *flags) { |
5002 | struct statvfs buf; | |
5003 | ||
5004 | if (statvfs(path, &buf) < 0) | |
5005 | return -errno; | |
5006 | *flags = buf.f_flag; | |
5007 | return 0; | |
5008 | } | |
5009 | ||
d6797c92 LP |
5010 | int bind_remount_recursive(const char *prefix, bool ro) { |
5011 | _cleanup_set_free_free_ Set *done = NULL; | |
5012 | _cleanup_free_ char *cleaned = NULL; | |
5013 | int r; | |
5014 | ||
5015 | /* Recursively remount a directory (and all its submounts) | |
5016 | * read-only or read-write. If the directory is already | |
5017 | * mounted, we reuse the mount and simply mark it | |
5018 | * MS_BIND|MS_RDONLY (or remove the MS_RDONLY for read-write | |
5019 | * operation). If it isn't we first make it one. Afterwards we | |
5020 | * apply MS_BIND|MS_RDONLY (or remove MS_RDONLY) to all | |
5021 | * submounts we can access, too. When mounts are stacked on | |
5022 | * the same mount point we only care for each individual | |
5023 | * "top-level" mount on each point, as we cannot | |
5024 | * influence/access the underlying mounts anyway. We do not | |
5025 | * have any effect on future submounts that might get | |
5026 | * propagated, they migt be writable. This includes future | |
5027 | * submounts that have been triggered via autofs. */ | |
5028 | ||
5029 | cleaned = strdup(prefix); | |
5030 | if (!cleaned) | |
5031 | return -ENOMEM; | |
5032 | ||
5033 | path_kill_slashes(cleaned); | |
5034 | ||
d5099efc | 5035 | done = set_new(&string_hash_ops); |
d6797c92 LP |
5036 | if (!done) |
5037 | return -ENOMEM; | |
5038 | ||
5039 | for (;;) { | |
5040 | _cleanup_fclose_ FILE *proc_self_mountinfo = NULL; | |
5041 | _cleanup_set_free_free_ Set *todo = NULL; | |
5042 | bool top_autofs = false; | |
5043 | char *x; | |
abe4aa14 | 5044 | unsigned long orig_flags; |
d6797c92 | 5045 | |
d5099efc | 5046 | todo = set_new(&string_hash_ops); |
d6797c92 LP |
5047 | if (!todo) |
5048 | return -ENOMEM; | |
5049 | ||
5050 | proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"); | |
5051 | if (!proc_self_mountinfo) | |
5052 | return -errno; | |
5053 | ||
5054 | for (;;) { | |
5055 | _cleanup_free_ char *path = NULL, *p = NULL, *type = NULL; | |
5056 | int k; | |
5057 | ||
5058 | k = fscanf(proc_self_mountinfo, | |
5059 | "%*s " /* (1) mount id */ | |
5060 | "%*s " /* (2) parent id */ | |
5061 | "%*s " /* (3) major:minor */ | |
5062 | "%*s " /* (4) root */ | |
5063 | "%ms " /* (5) mount point */ | |
5064 | "%*s" /* (6) mount options (superblock) */ | |
5065 | "%*[^-]" /* (7) optional fields */ | |
5066 | "- " /* (8) separator */ | |
5067 | "%ms " /* (9) file system type */ | |
5068 | "%*s" /* (10) mount source */ | |
5069 | "%*s" /* (11) mount options (bind mount) */ | |
5070 | "%*[^\n]", /* some rubbish at the end */ | |
5071 | &path, | |
5072 | &type); | |
5073 | if (k != 2) { | |
5074 | if (k == EOF) | |
5075 | break; | |
5076 | ||
5077 | continue; | |
5078 | } | |
5079 | ||
527b7a42 LP |
5080 | r = cunescape(path, UNESCAPE_RELAX, &p); |
5081 | if (r < 0) | |
5082 | return r; | |
d6797c92 LP |
5083 | |
5084 | /* Let's ignore autofs mounts. If they aren't | |
5085 | * triggered yet, we want to avoid triggering | |
5086 | * them, as we don't make any guarantees for | |
5087 | * future submounts anyway. If they are | |
5088 | * already triggered, then we will find | |
5089 | * another entry for this. */ | |
5090 | if (streq(type, "autofs")) { | |
5091 | top_autofs = top_autofs || path_equal(cleaned, p); | |
5092 | continue; | |
5093 | } | |
5094 | ||
5095 | if (path_startswith(p, cleaned) && | |
5096 | !set_contains(done, p)) { | |
5097 | ||
5098 | r = set_consume(todo, p); | |
5099 | p = NULL; | |
5100 | ||
5101 | if (r == -EEXIST) | |
5102 | continue; | |
5103 | if (r < 0) | |
5104 | return r; | |
5105 | } | |
5106 | } | |
5107 | ||
5108 | /* If we have no submounts to process anymore and if | |
5109 | * the root is either already done, or an autofs, we | |
5110 | * are done */ | |
5111 | if (set_isempty(todo) && | |
5112 | (top_autofs || set_contains(done, cleaned))) | |
5113 | return 0; | |
5114 | ||
5115 | if (!set_contains(done, cleaned) && | |
5116 | !set_contains(todo, cleaned)) { | |
5117 | /* The prefix directory itself is not yet a | |
5118 | * mount, make it one. */ | |
5119 | if (mount(cleaned, cleaned, NULL, MS_BIND|MS_REC, NULL) < 0) | |
5120 | return -errno; | |
5121 | ||
a7e07206 LP |
5122 | orig_flags = 0; |
5123 | (void) get_mount_flags(cleaned, &orig_flags); | |
abe4aa14 | 5124 | orig_flags &= ~MS_RDONLY; |
a7e07206 | 5125 | |
abe4aa14 | 5126 | if (mount(NULL, prefix, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) |
d6797c92 LP |
5127 | return -errno; |
5128 | ||
5129 | x = strdup(cleaned); | |
5130 | if (!x) | |
5131 | return -ENOMEM; | |
5132 | ||
5133 | r = set_consume(done, x); | |
5134 | if (r < 0) | |
5135 | return r; | |
5136 | } | |
5137 | ||
5138 | while ((x = set_steal_first(todo))) { | |
5139 | ||
5140 | r = set_consume(done, x); | |
5141 | if (r == -EEXIST) | |
5142 | continue; | |
5143 | if (r < 0) | |
5144 | return r; | |
5145 | ||
a7e07206 LP |
5146 | /* Try to reuse the original flag set, but |
5147 | * don't care for errors, in case of | |
5148 | * obstructed mounts */ | |
5149 | orig_flags = 0; | |
5150 | (void) get_mount_flags(x, &orig_flags); | |
abe4aa14 | 5151 | orig_flags &= ~MS_RDONLY; |
a7e07206 | 5152 | |
abe4aa14 | 5153 | if (mount(NULL, x, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) { |
d6797c92 LP |
5154 | |
5155 | /* Deal with mount points that are | |
5156 | * obstructed by a later mount */ | |
5157 | ||
5158 | if (errno != ENOENT) | |
5159 | return -errno; | |
5160 | } | |
5161 | ||
5162 | } | |
5163 | } | |
5164 | } | |
1b992147 LP |
5165 | |
5166 | int fflush_and_check(FILE *f) { | |
45c196a7 | 5167 | assert(f); |
1b992147 LP |
5168 | |
5169 | errno = 0; | |
5170 | fflush(f); | |
5171 | ||
5172 | if (ferror(f)) | |
5173 | return errno ? -errno : -EIO; | |
5174 | ||
5175 | return 0; | |
5176 | } | |
2e78fa79 | 5177 | |
ae6c3cc0 | 5178 | int tempfn_xxxxxx(const char *p, char **ret) { |
2e78fa79 LP |
5179 | const char *fn; |
5180 | char *t; | |
2e78fa79 LP |
5181 | |
5182 | assert(p); | |
ae6c3cc0 LP |
5183 | assert(ret); |
5184 | ||
c4e34a61 LP |
5185 | /* |
5186 | * Turns this: | |
5187 | * /foo/bar/waldo | |
5188 | * | |
5189 | * Into this: | |
8eebf6ad | 5190 | * /foo/bar/.#waldoXXXXXX |
c4e34a61 LP |
5191 | */ |
5192 | ||
ae6c3cc0 LP |
5193 | fn = basename(p); |
5194 | if (!filename_is_valid(fn)) | |
5195 | return -EINVAL; | |
2e78fa79 | 5196 | |
8eebf6ad | 5197 | t = new(char, strlen(p) + 2 + 6 + 1); |
2e78fa79 | 5198 | if (!t) |
ae6c3cc0 | 5199 | return -ENOMEM; |
2e78fa79 | 5200 | |
8eebf6ad | 5201 | strcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), fn), "XXXXXX"); |
2e78fa79 | 5202 | |
c4e34a61 | 5203 | *ret = path_kill_slashes(t); |
ae6c3cc0 | 5204 | return 0; |
2e78fa79 LP |
5205 | } |
5206 | ||
ae6c3cc0 | 5207 | int tempfn_random(const char *p, char **ret) { |
2e78fa79 LP |
5208 | const char *fn; |
5209 | char *t, *x; | |
5210 | uint64_t u; | |
2e78fa79 LP |
5211 | unsigned i; |
5212 | ||
5213 | assert(p); | |
ae6c3cc0 LP |
5214 | assert(ret); |
5215 | ||
c4e34a61 LP |
5216 | /* |
5217 | * Turns this: | |
5218 | * /foo/bar/waldo | |
5219 | * | |
5220 | * Into this: | |
8eebf6ad | 5221 | * /foo/bar/.#waldobaa2a261115984a9 |
c4e34a61 LP |
5222 | */ |
5223 | ||
ae6c3cc0 LP |
5224 | fn = basename(p); |
5225 | if (!filename_is_valid(fn)) | |
5226 | return -EINVAL; | |
2e78fa79 | 5227 | |
8eebf6ad | 5228 | t = new(char, strlen(p) + 2 + 16 + 1); |
2e78fa79 | 5229 | if (!t) |
ae6c3cc0 | 5230 | return -ENOMEM; |
2e78fa79 | 5231 | |
8eebf6ad | 5232 | x = stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), fn); |
2e78fa79 LP |
5233 | |
5234 | u = random_u64(); | |
5235 | for (i = 0; i < 16; i++) { | |
5236 | *(x++) = hexchar(u & 0xF); | |
5237 | u >>= 4; | |
5238 | } | |
5239 | ||
5240 | *x = 0; | |
5241 | ||
c4e34a61 LP |
5242 | *ret = path_kill_slashes(t); |
5243 | return 0; | |
5244 | } | |
5245 | ||
5246 | int tempfn_random_child(const char *p, char **ret) { | |
5247 | char *t, *x; | |
5248 | uint64_t u; | |
5249 | unsigned i; | |
5250 | ||
5251 | assert(p); | |
5252 | assert(ret); | |
5253 | ||
5254 | /* Turns this: | |
5255 | * /foo/bar/waldo | |
5256 | * Into this: | |
8eebf6ad | 5257 | * /foo/bar/waldo/.#3c2b6219aa75d7d0 |
c4e34a61 LP |
5258 | */ |
5259 | ||
8eebf6ad | 5260 | t = new(char, strlen(p) + 3 + 16 + 1); |
c4e34a61 LP |
5261 | if (!t) |
5262 | return -ENOMEM; | |
5263 | ||
8eebf6ad | 5264 | x = stpcpy(stpcpy(t, p), "/.#"); |
c4e34a61 LP |
5265 | |
5266 | u = random_u64(); | |
5267 | for (i = 0; i < 16; i++) { | |
5268 | *(x++) = hexchar(u & 0xF); | |
5269 | u >>= 4; | |
5270 | } | |
5271 | ||
5272 | *x = 0; | |
5273 | ||
5274 | *ret = path_kill_slashes(t); | |
ae6c3cc0 | 5275 | return 0; |
2e78fa79 | 5276 | } |
fecc80c1 | 5277 | |
45035609 LP |
5278 | int take_password_lock(const char *root) { |
5279 | ||
5280 | struct flock flock = { | |
5281 | .l_type = F_WRLCK, | |
5282 | .l_whence = SEEK_SET, | |
5283 | .l_start = 0, | |
5284 | .l_len = 0, | |
5285 | }; | |
5286 | ||
5287 | const char *path; | |
5288 | int fd, r; | |
5289 | ||
5290 | /* This is roughly the same as lckpwdf(), but not as awful. We | |
5291 | * don't want to use alarm() and signals, hence we implement | |
5292 | * our own trivial version of this. | |
5293 | * | |
5294 | * Note that shadow-utils also takes per-database locks in | |
5295 | * addition to lckpwdf(). However, we don't given that they | |
5296 | * are redundant as they they invoke lckpwdf() first and keep | |
5297 | * it during everything they do. The per-database locks are | |
5298 | * awfully racy, and thus we just won't do them. */ | |
5299 | ||
5300 | if (root) | |
63c372cb | 5301 | path = strjoina(root, "/etc/.pwd.lock"); |
45035609 LP |
5302 | else |
5303 | path = "/etc/.pwd.lock"; | |
5304 | ||
5305 | fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0600); | |
5306 | if (fd < 0) | |
5307 | return -errno; | |
5308 | ||
5309 | r = fcntl(fd, F_SETLKW, &flock); | |
5310 | if (r < 0) { | |
5311 | safe_close(fd); | |
5312 | return -errno; | |
5313 | } | |
5314 | ||
5315 | return fd; | |
5316 | } | |
5261ba90 TT |
5317 | |
5318 | int is_symlink(const char *path) { | |
5319 | struct stat info; | |
5320 | ||
5321 | if (lstat(path, &info) < 0) | |
5322 | return -errno; | |
5323 | ||
be57e297 LP |
5324 | return !!S_ISLNK(info.st_mode); |
5325 | } | |
5261ba90 | 5326 | |
be57e297 LP |
5327 | int is_dir(const char* path, bool follow) { |
5328 | struct stat st; | |
d1bddcec | 5329 | int r; |
be57e297 | 5330 | |
d1bddcec LP |
5331 | if (follow) |
5332 | r = stat(path, &st); | |
5333 | else | |
5334 | r = lstat(path, &st); | |
5335 | if (r < 0) | |
5336 | return -errno; | |
be57e297 LP |
5337 | |
5338 | return !!S_ISDIR(st.st_mode); | |
a0627f82 | 5339 | } |
7629889c | 5340 | |
ce5b3ad4 SJ |
5341 | int is_device_node(const char *path) { |
5342 | struct stat info; | |
5343 | ||
5344 | if (lstat(path, &info) < 0) | |
5345 | return -errno; | |
5346 | ||
5347 | return !!(S_ISBLK(info.st_mode) || S_ISCHR(info.st_mode)); | |
5348 | } | |
5349 | ||
4034a06d | 5350 | int unquote_first_word(const char **p, char **ret, UnquoteFlags flags) { |
7629889c LP |
5351 | _cleanup_free_ char *s = NULL; |
5352 | size_t allocated = 0, sz = 0; | |
4034a06d | 5353 | int r; |
7629889c LP |
5354 | |
5355 | enum { | |
5356 | START, | |
5357 | VALUE, | |
5358 | VALUE_ESCAPE, | |
5359 | SINGLE_QUOTE, | |
5360 | SINGLE_QUOTE_ESCAPE, | |
5361 | DOUBLE_QUOTE, | |
5362 | DOUBLE_QUOTE_ESCAPE, | |
5363 | SPACE, | |
5364 | } state = START; | |
5365 | ||
5366 | assert(p); | |
5367 | assert(*p); | |
5368 | assert(ret); | |
5369 | ||
5370 | /* Parses the first word of a string, and returns it in | |
5371 | * *ret. Removes all quotes in the process. When parsing fails | |
5372 | * (because of an uneven number of quotes or similar), leaves | |
5373 | * the pointer *p at the first invalid character. */ | |
5374 | ||
5375 | for (;;) { | |
5376 | char c = **p; | |
5377 | ||
5378 | switch (state) { | |
5379 | ||
5380 | case START: | |
5381 | if (c == 0) | |
5382 | goto finish; | |
5383 | else if (strchr(WHITESPACE, c)) | |
5384 | break; | |
5385 | ||
5386 | state = VALUE; | |
5387 | /* fallthrough */ | |
5388 | ||
5389 | case VALUE: | |
5390 | if (c == 0) | |
5391 | goto finish; | |
5392 | else if (c == '\'') | |
5393 | state = SINGLE_QUOTE; | |
5394 | else if (c == '\\') | |
5395 | state = VALUE_ESCAPE; | |
5396 | else if (c == '\"') | |
5397 | state = DOUBLE_QUOTE; | |
5398 | else if (strchr(WHITESPACE, c)) | |
5399 | state = SPACE; | |
5400 | else { | |
5401 | if (!GREEDY_REALLOC(s, allocated, sz+2)) | |
5402 | return -ENOMEM; | |
5403 | ||
5404 | s[sz++] = c; | |
5405 | } | |
5406 | ||
5407 | break; | |
5408 | ||
5409 | case VALUE_ESCAPE: | |
f32d2db1 | 5410 | if (c == 0) { |
4034a06d | 5411 | if (flags & UNQUOTE_RELAX) |
f32d2db1 | 5412 | goto finish; |
7629889c | 5413 | return -EINVAL; |
f32d2db1 | 5414 | } |
7629889c | 5415 | |
8ebac1f9 | 5416 | if (!GREEDY_REALLOC(s, allocated, sz+7)) |
7629889c LP |
5417 | return -ENOMEM; |
5418 | ||
4034a06d | 5419 | if (flags & UNQUOTE_CUNESCAPE) { |
f3ee6297 LP |
5420 | uint32_t u; |
5421 | ||
5422 | r = cunescape_one(*p, (size_t) -1, &c, &u); | |
4034a06d LP |
5423 | if (r < 0) |
5424 | return -EINVAL; | |
5425 | ||
5426 | (*p) += r - 1; | |
4034a06d | 5427 | |
f3ee6297 LP |
5428 | if (c != 0) |
5429 | s[sz++] = c; /* normal explicit char */ | |
5430 | else | |
8ebac1f9 | 5431 | sz += utf8_encode_unichar(s + sz, u); /* unicode chars we'll encode as utf8 */ |
f3ee6297 LP |
5432 | } else |
5433 | s[sz++] = c; | |
7629889c | 5434 | |
f3ee6297 | 5435 | state = VALUE; |
7629889c LP |
5436 | break; |
5437 | ||
5438 | case SINGLE_QUOTE: | |
f32d2db1 | 5439 | if (c == 0) { |
4034a06d | 5440 | if (flags & UNQUOTE_RELAX) |
f32d2db1 | 5441 | goto finish; |
7629889c | 5442 | return -EINVAL; |
f32d2db1 | 5443 | } else if (c == '\'') |
7629889c LP |
5444 | state = VALUE; |
5445 | else if (c == '\\') | |
5446 | state = SINGLE_QUOTE_ESCAPE; | |
5447 | else { | |
5448 | if (!GREEDY_REALLOC(s, allocated, sz+2)) | |
5449 | return -ENOMEM; | |
5450 | ||
5451 | s[sz++] = c; | |
5452 | } | |
5453 | ||
5454 | break; | |
5455 | ||
5456 | case SINGLE_QUOTE_ESCAPE: | |
f32d2db1 | 5457 | if (c == 0) { |
4034a06d | 5458 | if (flags & UNQUOTE_RELAX) |
f32d2db1 | 5459 | goto finish; |
7629889c | 5460 | return -EINVAL; |
f32d2db1 | 5461 | } |
7629889c | 5462 | |
8ebac1f9 | 5463 | if (!GREEDY_REALLOC(s, allocated, sz+7)) |
7629889c LP |
5464 | return -ENOMEM; |
5465 | ||
4034a06d | 5466 | if (flags & UNQUOTE_CUNESCAPE) { |
f3ee6297 LP |
5467 | uint32_t u; |
5468 | ||
5469 | r = cunescape_one(*p, (size_t) -1, &c, &u); | |
4034a06d LP |
5470 | if (r < 0) |
5471 | return -EINVAL; | |
5472 | ||
5473 | (*p) += r - 1; | |
4034a06d | 5474 | |
f3ee6297 LP |
5475 | if (c != 0) |
5476 | s[sz++] = c; | |
5477 | else | |
8ebac1f9 | 5478 | sz += utf8_encode_unichar(s + sz, u); |
f3ee6297 LP |
5479 | } else |
5480 | s[sz++] = c; | |
5481 | ||
7629889c LP |
5482 | state = SINGLE_QUOTE; |
5483 | break; | |
5484 | ||
5485 | case DOUBLE_QUOTE: | |
5486 | if (c == 0) | |
5487 | return -EINVAL; | |
5488 | else if (c == '\"') | |
5489 | state = VALUE; | |
5490 | else if (c == '\\') | |
5491 | state = DOUBLE_QUOTE_ESCAPE; | |
5492 | else { | |
5493 | if (!GREEDY_REALLOC(s, allocated, sz+2)) | |
5494 | return -ENOMEM; | |
5495 | ||
5496 | s[sz++] = c; | |
5497 | } | |
5498 | ||
5499 | break; | |
5500 | ||
5501 | case DOUBLE_QUOTE_ESCAPE: | |
f32d2db1 | 5502 | if (c == 0) { |
4034a06d | 5503 | if (flags & UNQUOTE_RELAX) |
f32d2db1 | 5504 | goto finish; |
7629889c | 5505 | return -EINVAL; |
f32d2db1 | 5506 | } |
7629889c | 5507 | |
8ebac1f9 | 5508 | if (!GREEDY_REALLOC(s, allocated, sz+7)) |
7629889c LP |
5509 | return -ENOMEM; |
5510 | ||
4034a06d | 5511 | if (flags & UNQUOTE_CUNESCAPE) { |
f3ee6297 LP |
5512 | uint32_t u; |
5513 | ||
5514 | r = cunescape_one(*p, (size_t) -1, &c, &u); | |
4034a06d LP |
5515 | if (r < 0) |
5516 | return -EINVAL; | |
5517 | ||
5518 | (*p) += r - 1; | |
4034a06d | 5519 | |
f3ee6297 LP |
5520 | if (c != 0) |
5521 | s[sz++] = c; | |
5522 | else | |
8ebac1f9 | 5523 | sz += utf8_encode_unichar(s + sz, u); |
f3ee6297 LP |
5524 | } else |
5525 | s[sz++] = c; | |
5526 | ||
7629889c LP |
5527 | state = DOUBLE_QUOTE; |
5528 | break; | |
5529 | ||
5530 | case SPACE: | |
5531 | if (c == 0) | |
5532 | goto finish; | |
5533 | if (!strchr(WHITESPACE, c)) | |
5534 | goto finish; | |
5535 | ||
5536 | break; | |
5537 | } | |
5538 | ||
5539 | (*p) ++; | |
5540 | } | |
5541 | ||
5542 | finish: | |
5543 | if (!s) { | |
5544 | *ret = NULL; | |
5545 | return 0; | |
5546 | } | |
5547 | ||
5548 | s[sz] = 0; | |
5549 | *ret = s; | |
5550 | s = NULL; | |
5551 | ||
5552 | return 1; | |
5553 | } | |
5554 | ||
4034a06d | 5555 | int unquote_many_words(const char **p, UnquoteFlags flags, ...) { |
7629889c LP |
5556 | va_list ap; |
5557 | char **l; | |
5558 | int n = 0, i, c, r; | |
5559 | ||
5560 | /* Parses a number of words from a string, stripping any | |
5561 | * quotes if necessary. */ | |
5562 | ||
5563 | assert(p); | |
5564 | ||
5565 | /* Count how many words are expected */ | |
4034a06d | 5566 | va_start(ap, flags); |
7629889c LP |
5567 | for (;;) { |
5568 | if (!va_arg(ap, char **)) | |
5569 | break; | |
5570 | n++; | |
5571 | } | |
5572 | va_end(ap); | |
5573 | ||
5574 | if (n <= 0) | |
5575 | return 0; | |
5576 | ||
5577 | /* Read all words into a temporary array */ | |
5578 | l = newa0(char*, n); | |
5579 | for (c = 0; c < n; c++) { | |
5580 | ||
4034a06d | 5581 | r = unquote_first_word(p, &l[c], flags); |
7629889c LP |
5582 | if (r < 0) { |
5583 | int j; | |
5584 | ||
081e009b | 5585 | for (j = 0; j < c; j++) |
7629889c | 5586 | free(l[j]); |
081e009b LN |
5587 | |
5588 | return r; | |
7629889c LP |
5589 | } |
5590 | ||
5591 | if (r == 0) | |
5592 | break; | |
5593 | } | |
5594 | ||
5595 | /* If we managed to parse all words, return them in the passed | |
5596 | * in parameters */ | |
4034a06d | 5597 | va_start(ap, flags); |
7629889c LP |
5598 | for (i = 0; i < n; i++) { |
5599 | char **v; | |
5600 | ||
5601 | v = va_arg(ap, char **); | |
5602 | assert(v); | |
5603 | ||
5604 | *v = l[i]; | |
5605 | } | |
5606 | va_end(ap); | |
5607 | ||
5608 | return c; | |
5609 | } | |
2928b0a8 LP |
5610 | |
5611 | int free_and_strdup(char **p, const char *s) { | |
5612 | char *t; | |
5613 | ||
5614 | assert(p); | |
5615 | ||
5616 | /* Replaces a string pointer with an strdup()ed new string, | |
5617 | * possibly freeing the old one. */ | |
5618 | ||
4b64536e LP |
5619 | if (streq_ptr(*p, s)) |
5620 | return 0; | |
5621 | ||
2928b0a8 LP |
5622 | if (s) { |
5623 | t = strdup(s); | |
5624 | if (!t) | |
5625 | return -ENOMEM; | |
5626 | } else | |
5627 | t = NULL; | |
5628 | ||
5629 | free(*p); | |
5630 | *p = t; | |
5631 | ||
4b64536e | 5632 | return 1; |
2928b0a8 | 5633 | } |
605f81a8 | 5634 | |
ee451d76 LP |
5635 | int ptsname_malloc(int fd, char **ret) { |
5636 | size_t l = 100; | |
5637 | ||
9d8c4979 LP |
5638 | assert(fd >= 0); |
5639 | assert(ret); | |
5640 | ||
ee451d76 LP |
5641 | for (;;) { |
5642 | char *c; | |
5643 | ||
5644 | c = new(char, l); | |
5645 | if (!c) | |
5646 | return -ENOMEM; | |
5647 | ||
5648 | if (ptsname_r(fd, c, l) == 0) { | |
5649 | *ret = c; | |
5650 | return 0; | |
5651 | } | |
5652 | if (errno != ERANGE) { | |
5653 | free(c); | |
5654 | return -errno; | |
5655 | } | |
5656 | ||
5657 | free(c); | |
5658 | l *= 2; | |
5659 | } | |
5660 | } | |
5f8cc96a LP |
5661 | |
5662 | int openpt_in_namespace(pid_t pid, int flags) { | |
5663 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, rootfd = -1; | |
5664 | _cleanup_close_pair_ int pair[2] = { -1, -1 }; | |
5665 | union { | |
5666 | struct cmsghdr cmsghdr; | |
5667 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
5668 | } control = {}; | |
5669 | struct msghdr mh = { | |
5670 | .msg_control = &control, | |
5671 | .msg_controllen = sizeof(control), | |
5672 | }; | |
5673 | struct cmsghdr *cmsg; | |
5674 | siginfo_t si; | |
5675 | pid_t child; | |
5676 | int r; | |
5677 | ||
5678 | assert(pid > 0); | |
5679 | ||
5680 | r = namespace_open(pid, &pidnsfd, &mntnsfd, NULL, &rootfd); | |
5681 | if (r < 0) | |
5682 | return r; | |
5683 | ||
5684 | if (socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) < 0) | |
5685 | return -errno; | |
5686 | ||
5687 | child = fork(); | |
5688 | if (child < 0) | |
5689 | return -errno; | |
5690 | ||
5691 | if (child == 0) { | |
5692 | int master; | |
5693 | ||
5694 | pair[0] = safe_close(pair[0]); | |
5695 | ||
5696 | r = namespace_enter(pidnsfd, mntnsfd, -1, rootfd); | |
5697 | if (r < 0) | |
5698 | _exit(EXIT_FAILURE); | |
5699 | ||
5700 | master = posix_openpt(flags); | |
5701 | if (master < 0) | |
5702 | _exit(EXIT_FAILURE); | |
5703 | ||
5704 | cmsg = CMSG_FIRSTHDR(&mh); | |
5705 | cmsg->cmsg_level = SOL_SOCKET; | |
5706 | cmsg->cmsg_type = SCM_RIGHTS; | |
5707 | cmsg->cmsg_len = CMSG_LEN(sizeof(int)); | |
5708 | memcpy(CMSG_DATA(cmsg), &master, sizeof(int)); | |
5709 | ||
5710 | mh.msg_controllen = cmsg->cmsg_len; | |
5711 | ||
5712 | if (sendmsg(pair[1], &mh, MSG_NOSIGNAL) < 0) | |
5713 | _exit(EXIT_FAILURE); | |
5714 | ||
5715 | _exit(EXIT_SUCCESS); | |
5716 | } | |
5717 | ||
5718 | pair[1] = safe_close(pair[1]); | |
5719 | ||
5720 | r = wait_for_terminate(child, &si); | |
5721 | if (r < 0) | |
5722 | return r; | |
5723 | if (si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS) | |
5724 | return -EIO; | |
5725 | ||
5726 | if (recvmsg(pair[0], &mh, MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) < 0) | |
5727 | return -errno; | |
5728 | ||
5729 | for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) | |
5730 | if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) { | |
5731 | int *fds; | |
5732 | unsigned n_fds; | |
5733 | ||
5734 | fds = (int*) CMSG_DATA(cmsg); | |
5735 | n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int); | |
5736 | ||
5737 | if (n_fds != 1) { | |
5738 | close_many(fds, n_fds); | |
5739 | return -EIO; | |
5740 | } | |
5741 | ||
5742 | return fds[0]; | |
5743 | } | |
5744 | ||
5745 | return -EIO; | |
5746 | } | |
4a4d89b6 | 5747 | |
10f9c755 LP |
5748 | ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags) { |
5749 | _cleanup_close_ int fd = -1; | |
5750 | ssize_t l; | |
5751 | ||
5752 | /* The kernel doesn't have a fgetxattrat() command, hence let's emulate one */ | |
5753 | ||
5754 | fd = openat(dirfd, filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOATIME|(flags & AT_SYMLINK_NOFOLLOW ? O_NOFOLLOW : 0)); | |
5755 | if (fd < 0) | |
5756 | return -errno; | |
5757 | ||
5758 | l = fgetxattr(fd, attribute, value, size); | |
5759 | if (l < 0) | |
5760 | return -errno; | |
5761 | ||
5762 | return l; | |
5763 | } | |
5764 | ||
5765 | static int parse_crtime(le64_t le, usec_t *usec) { | |
4a4d89b6 | 5766 | uint64_t u; |
10f9c755 LP |
5767 | |
5768 | assert(usec); | |
5769 | ||
5770 | u = le64toh(le); | |
5771 | if (u == 0 || u == (uint64_t) -1) | |
5772 | return -EIO; | |
5773 | ||
5774 | *usec = (usec_t) u; | |
5775 | return 0; | |
5776 | } | |
5777 | ||
5778 | int fd_getcrtime(int fd, usec_t *usec) { | |
4a4d89b6 LP |
5779 | le64_t le; |
5780 | ssize_t n; | |
5781 | ||
5782 | assert(fd >= 0); | |
5783 | assert(usec); | |
5784 | ||
5785 | /* Until Linux gets a real concept of birthtime/creation time, | |
5786 | * let's fake one with xattrs */ | |
5787 | ||
5788 | n = fgetxattr(fd, "user.crtime_usec", &le, sizeof(le)); | |
5789 | if (n < 0) | |
5790 | return -errno; | |
5791 | if (n != sizeof(le)) | |
5792 | return -EIO; | |
5793 | ||
10f9c755 LP |
5794 | return parse_crtime(le, usec); |
5795 | } | |
5796 | ||
5797 | int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags) { | |
5798 | le64_t le; | |
5799 | ssize_t n; | |
5800 | ||
5801 | n = fgetxattrat_fake(dirfd, name, "user.crtime_usec", &le, sizeof(le), flags); | |
5802 | if (n < 0) | |
5803 | return -errno; | |
5804 | if (n != sizeof(le)) | |
4a4d89b6 LP |
5805 | return -EIO; |
5806 | ||
10f9c755 | 5807 | return parse_crtime(le, usec); |
4a4d89b6 LP |
5808 | } |
5809 | ||
5810 | int path_getcrtime(const char *p, usec_t *usec) { | |
4a4d89b6 LP |
5811 | le64_t le; |
5812 | ssize_t n; | |
5813 | ||
5814 | assert(p); | |
5815 | assert(usec); | |
5816 | ||
5817 | n = getxattr(p, "user.crtime_usec", &le, sizeof(le)); | |
5818 | if (n < 0) | |
5819 | return -errno; | |
5820 | if (n != sizeof(le)) | |
5821 | return -EIO; | |
5822 | ||
10f9c755 | 5823 | return parse_crtime(le, usec); |
4a4d89b6 LP |
5824 | } |
5825 | ||
5826 | int fd_setcrtime(int fd, usec_t usec) { | |
5827 | le64_t le; | |
5828 | ||
5829 | assert(fd >= 0); | |
5830 | ||
d61b600d LP |
5831 | if (usec <= 0) |
5832 | usec = now(CLOCK_REALTIME); | |
5833 | ||
4a4d89b6 | 5834 | le = htole64((uint64_t) usec); |
2c39ea52 | 5835 | if (fsetxattr(fd, "user.crtime_usec", &le, sizeof(le), 0) < 0) |
4a4d89b6 LP |
5836 | return -errno; |
5837 | ||
5838 | return 0; | |
5839 | } | |
a354329f LP |
5840 | |
5841 | int same_fd(int a, int b) { | |
5842 | struct stat sta, stb; | |
f7ad54a3 LP |
5843 | pid_t pid; |
5844 | int r, fa, fb; | |
a354329f LP |
5845 | |
5846 | assert(a >= 0); | |
5847 | assert(b >= 0); | |
5848 | ||
f7ad54a3 LP |
5849 | /* Compares two file descriptors. Note that semantics are |
5850 | * quite different depending on whether we have kcmp() or we | |
5851 | * don't. If we have kcmp() this will only return true for | |
5852 | * dup()ed file descriptors, but not otherwise. If we don't | |
5853 | * have kcmp() this will also return true for two fds of the same | |
5854 | * file, created by separate open() calls. Since we use this | |
5855 | * call mostly for filtering out duplicates in the fd store | |
5856 | * this difference hopefully doesn't matter too much. */ | |
5857 | ||
a354329f LP |
5858 | if (a == b) |
5859 | return true; | |
5860 | ||
f7ad54a3 LP |
5861 | /* Try to use kcmp() if we have it. */ |
5862 | pid = getpid(); | |
5863 | r = kcmp(pid, pid, KCMP_FILE, a, b); | |
5864 | if (r == 0) | |
5865 | return true; | |
5866 | if (r > 0) | |
5867 | return false; | |
5868 | if (errno != ENOSYS) | |
5869 | return -errno; | |
5870 | ||
5871 | /* We don't have kcmp(), use fstat() instead. */ | |
a354329f LP |
5872 | if (fstat(a, &sta) < 0) |
5873 | return -errno; | |
5874 | ||
5875 | if (fstat(b, &stb) < 0) | |
5876 | return -errno; | |
5877 | ||
5878 | if ((sta.st_mode & S_IFMT) != (stb.st_mode & S_IFMT)) | |
5879 | return false; | |
5880 | ||
f7ad54a3 LP |
5881 | /* We consider all device fds different, since two device fds |
5882 | * might refer to quite different device contexts even though | |
5883 | * they share the same inode and backing dev_t. */ | |
a354329f | 5884 | |
f7ad54a3 LP |
5885 | if (S_ISCHR(sta.st_mode) || S_ISBLK(sta.st_mode)) |
5886 | return false; | |
5887 | ||
5888 | if (sta.st_dev != stb.st_dev || sta.st_ino != stb.st_ino) | |
5889 | return false; | |
5890 | ||
5891 | /* The fds refer to the same inode on disk, let's also check | |
5892 | * if they have the same fd flags. This is useful to | |
5893 | * distuingish the read and write side of a pipe created with | |
5894 | * pipe(). */ | |
5895 | fa = fcntl(a, F_GETFL); | |
5896 | if (fa < 0) | |
5897 | return -errno; | |
5898 | ||
5899 | fb = fcntl(b, F_GETFL); | |
5900 | if (fb < 0) | |
5901 | return -errno; | |
5902 | ||
5903 | return fa == fb; | |
a354329f | 5904 | } |
11689d2a | 5905 | |
1ed8f8c1 | 5906 | int chattr_fd(int fd, unsigned value, unsigned mask) { |
45030287 | 5907 | unsigned old_attr, new_attr; |
03091baa | 5908 | struct stat st; |
11689d2a LP |
5909 | |
5910 | assert(fd >= 0); | |
5911 | ||
03091baa LP |
5912 | if (fstat(fd, &st) < 0) |
5913 | return -errno; | |
5914 | ||
5915 | /* Explicitly check whether this is a regular file or | |
5916 | * directory. If it is anything else (such as a device node or | |
5917 | * fifo), then the ioctl will not hit the file systems but | |
5918 | * possibly drivers, where the ioctl might have different | |
5919 | * effects. Notably, DRM is using the same ioctl() number. */ | |
5920 | ||
5921 | if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode)) | |
5922 | return -ENOTTY; | |
5923 | ||
45030287 LP |
5924 | if (mask == 0) |
5925 | return 0; | |
5926 | ||
11689d2a LP |
5927 | if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0) |
5928 | return -errno; | |
5929 | ||
1ed8f8c1 | 5930 | new_attr = (old_attr & ~mask) | (value & mask); |
11689d2a LP |
5931 | if (new_attr == old_attr) |
5932 | return 0; | |
5933 | ||
5934 | if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0) | |
5935 | return -errno; | |
5936 | ||
1ed8f8c1 | 5937 | return 1; |
11689d2a LP |
5938 | } |
5939 | ||
1ed8f8c1 | 5940 | int chattr_path(const char *p, unsigned value, unsigned mask) { |
11689d2a LP |
5941 | _cleanup_close_ int fd = -1; |
5942 | ||
45030287 LP |
5943 | assert(p); |
5944 | ||
5945 | if (mask == 0) | |
5946 | return 0; | |
5947 | ||
01b72568 | 5948 | fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW); |
11689d2a LP |
5949 | if (fd < 0) |
5950 | return -errno; | |
5951 | ||
1ed8f8c1 | 5952 | return chattr_fd(fd, value, mask); |
5b9fbd35 GB |
5953 | } |
5954 | ||
01b72568 | 5955 | int read_attr_fd(int fd, unsigned *ret) { |
03091baa LP |
5956 | struct stat st; |
5957 | ||
01b72568 LP |
5958 | assert(fd >= 0); |
5959 | ||
03091baa LP |
5960 | if (fstat(fd, &st) < 0) |
5961 | return -errno; | |
5962 | ||
5963 | if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode)) | |
5964 | return -ENOTTY; | |
5965 | ||
01b72568 LP |
5966 | if (ioctl(fd, FS_IOC_GETFLAGS, ret) < 0) |
5967 | return -errno; | |
5968 | ||
5969 | return 0; | |
5970 | } | |
5971 | ||
5972 | int read_attr_path(const char *p, unsigned *ret) { | |
5973 | _cleanup_close_ int fd = -1; | |
5974 | ||
5975 | assert(p); | |
5976 | assert(ret); | |
5977 | ||
5978 | fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW); | |
5979 | if (fd < 0) | |
5980 | return -errno; | |
5981 | ||
5982 | return read_attr_fd(fd, ret); | |
5983 | } | |
30535c16 | 5984 | |
ff6a7460 LP |
5985 | static size_t nul_length(const uint8_t *p, size_t sz) { |
5986 | size_t n = 0; | |
5987 | ||
5988 | while (sz > 0) { | |
5989 | if (*p != 0) | |
5990 | break; | |
5991 | ||
5992 | n++; | |
5993 | p++; | |
5994 | sz--; | |
5995 | } | |
5996 | ||
5997 | return n; | |
5998 | } | |
5999 | ||
6000 | ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length) { | |
6001 | const uint8_t *q, *w, *e; | |
6002 | ssize_t l; | |
6003 | ||
6004 | q = w = p; | |
6005 | e = q + sz; | |
6006 | while (q < e) { | |
6007 | size_t n; | |
6008 | ||
6009 | n = nul_length(q, e - q); | |
6010 | ||
6011 | /* If there are more than the specified run length of | |
6012 | * NUL bytes, or if this is the beginning or the end | |
6013 | * of the buffer, then seek instead of write */ | |
6014 | if ((n > run_length) || | |
6015 | (n > 0 && q == p) || | |
6016 | (n > 0 && q + n >= e)) { | |
6017 | if (q > w) { | |
6018 | l = write(fd, w, q - w); | |
6019 | if (l < 0) | |
6020 | return -errno; | |
6021 | if (l != q -w) | |
6022 | return -EIO; | |
6023 | } | |
6024 | ||
6025 | if (lseek(fd, n, SEEK_CUR) == (off_t) -1) | |
6026 | return -errno; | |
6027 | ||
6028 | q += n; | |
6029 | w = q; | |
6030 | } else if (n > 0) | |
6031 | q += n; | |
6032 | else | |
6033 | q ++; | |
6034 | } | |
6035 | ||
6036 | if (q > w) { | |
6037 | l = write(fd, w, q - w); | |
6038 | if (l < 0) | |
6039 | return -errno; | |
6040 | if (l != q - w) | |
6041 | return -EIO; | |
6042 | } | |
6043 | ||
6044 | return q - (const uint8_t*) p; | |
6045 | } | |
3576d631 LP |
6046 | |
6047 | void sigkill_wait(pid_t *pid) { | |
6048 | if (!pid) | |
6049 | return; | |
6050 | if (*pid <= 1) | |
6051 | return; | |
6052 | ||
6053 | if (kill(*pid, SIGKILL) > 0) | |
6054 | (void) wait_for_terminate(*pid, NULL); | |
6055 | } | |
3d7415f4 LP |
6056 | |
6057 | int syslog_parse_priority(const char **p, int *priority, bool with_facility) { | |
6058 | int a = 0, b = 0, c = 0; | |
6059 | int k; | |
6060 | ||
6061 | assert(p); | |
6062 | assert(*p); | |
6063 | assert(priority); | |
6064 | ||
6065 | if ((*p)[0] != '<') | |
6066 | return 0; | |
6067 | ||
6068 | if (!strchr(*p, '>')) | |
6069 | return 0; | |
6070 | ||
6071 | if ((*p)[2] == '>') { | |
6072 | c = undecchar((*p)[1]); | |
6073 | k = 3; | |
6074 | } else if ((*p)[3] == '>') { | |
6075 | b = undecchar((*p)[1]); | |
6076 | c = undecchar((*p)[2]); | |
6077 | k = 4; | |
6078 | } else if ((*p)[4] == '>') { | |
6079 | a = undecchar((*p)[1]); | |
6080 | b = undecchar((*p)[2]); | |
6081 | c = undecchar((*p)[3]); | |
6082 | k = 5; | |
6083 | } else | |
6084 | return 0; | |
6085 | ||
6086 | if (a < 0 || b < 0 || c < 0 || | |
6087 | (!with_facility && (a || b || c > 7))) | |
6088 | return 0; | |
6089 | ||
6090 | if (with_facility) | |
6091 | *priority = a*100 + b*10 + c; | |
6092 | else | |
6093 | *priority = (*priority & LOG_FACMASK) | c; | |
6094 | ||
6095 | *p += k; | |
6096 | return 1; | |
6097 | } | |
9cad100e BB |
6098 | |
6099 | ssize_t string_table_lookup(const char * const *table, size_t len, const char *key) { | |
6100 | size_t i; | |
6101 | ||
6102 | if (!key) | |
6103 | return -1; | |
6104 | ||
6105 | for (i = 0; i < len; ++i) | |
6106 | if (streq_ptr(table[i], key)) | |
6107 | return (ssize_t)i; | |
6108 | ||
6109 | return -1; | |
6110 | } | |
1c8da044 LP |
6111 | |
6112 | void cmsg_close_all(struct msghdr *mh) { | |
6113 | struct cmsghdr *cmsg; | |
6114 | ||
6115 | assert(mh); | |
6116 | ||
6117 | for (cmsg = CMSG_FIRSTHDR(mh); cmsg; cmsg = CMSG_NXTHDR(mh, cmsg)) | |
6118 | if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) | |
6119 | close_many((int*) CMSG_DATA(cmsg), (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int)); | |
6120 | } | |
f85ef957 AC |
6121 | |
6122 | int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath) { | |
6123 | struct stat buf; | |
6124 | int ret; | |
6125 | ||
6126 | ret = renameat2(olddirfd, oldpath, newdirfd, newpath, RENAME_NOREPLACE); | |
6127 | if (ret >= 0) | |
6128 | return 0; | |
6129 | ||
6130 | /* Even though renameat2() exists since Linux 3.15, btrfs added | |
6131 | * support for it later. If it is not implemented, fallback to another | |
6132 | * method. */ | |
6133 | if (errno != EINVAL) | |
6134 | return -errno; | |
6135 | ||
6136 | /* The link()/unlink() fallback does not work on directories. But | |
6137 | * renameat() without RENAME_NOREPLACE gives the same semantics on | |
6138 | * directories, except when newpath is an *empty* directory. This is | |
6139 | * good enough. */ | |
6140 | ret = fstatat(olddirfd, oldpath, &buf, AT_SYMLINK_NOFOLLOW); | |
6141 | if (ret >= 0 && S_ISDIR(buf.st_mode)) { | |
6142 | ret = renameat(olddirfd, oldpath, newdirfd, newpath); | |
6143 | return ret >= 0 ? 0 : -errno; | |
6144 | } | |
6145 | ||
6146 | /* If it is not a directory, use the link()/unlink() fallback. */ | |
6147 | ret = linkat(olddirfd, oldpath, newdirfd, newpath, 0); | |
6148 | if (ret < 0) | |
6149 | return -errno; | |
6150 | ||
6151 | ret = unlinkat(olddirfd, oldpath, 0); | |
6152 | if (ret < 0) { | |
6153 | /* backup errno before the following unlinkat() alters it */ | |
6154 | ret = errno; | |
6155 | (void) unlinkat(newdirfd, newpath, 0); | |
6156 | errno = ret; | |
6157 | return -errno; | |
6158 | } | |
6159 | ||
6160 | return 0; | |
6161 | } | |
019c7fba LP |
6162 | |
6163 | char *shell_maybe_quote(const char *s) { | |
6164 | const char *p; | |
6165 | char *r, *t; | |
6166 | ||
6167 | assert(s); | |
6168 | ||
6169 | /* Encloses a string in double quotes if necessary to make it | |
6170 | * OK as shell string. */ | |
6171 | ||
6172 | for (p = s; *p; p++) | |
6173 | if (*p <= ' ' || | |
6174 | *p >= 127 || | |
6175 | strchr(SHELL_NEED_QUOTES, *p)) | |
6176 | break; | |
6177 | ||
6178 | if (!*p) | |
6179 | return strdup(s); | |
6180 | ||
6181 | r = new(char, 1+strlen(s)*2+1+1); | |
6182 | if (!r) | |
6183 | return NULL; | |
6184 | ||
6185 | t = r; | |
6186 | *(t++) = '"'; | |
6187 | t = mempcpy(t, s, p - s); | |
6188 | ||
6189 | for (; *p; p++) { | |
6190 | ||
6191 | if (strchr(SHELL_NEED_ESCAPE, *p)) | |
6192 | *(t++) = '\\'; | |
6193 | ||
6194 | *(t++) = *p; | |
6195 | } | |
6196 | ||
6197 | *(t++)= '"'; | |
6198 | *t = 0; | |
6199 | ||
6200 | return r; | |
6201 | } | |
2ff7b0a5 LP |
6202 | |
6203 | int parse_mode(const char *s, mode_t *ret) { | |
6204 | char *x; | |
6205 | long l; | |
6206 | ||
6207 | assert(s); | |
6208 | assert(ret); | |
6209 | ||
6210 | errno = 0; | |
6211 | l = strtol(s, &x, 8); | |
6212 | if (errno != 0) | |
6213 | return -errno; | |
6214 | ||
6215 | if (!x || x == s || *x) | |
6216 | return -EINVAL; | |
6217 | if (l < 0 || l > 07777) | |
6218 | return -ERANGE; | |
6219 | ||
6220 | *ret = (mode_t) l; | |
6221 | return 0; | |
6222 | } | |
6458ec20 LP |
6223 | |
6224 | int mount_move_root(const char *path) { | |
6225 | assert(path); | |
6226 | ||
6227 | if (chdir(path) < 0) | |
6228 | return -errno; | |
6229 | ||
6230 | if (mount(path, "/", NULL, MS_MOVE, NULL) < 0) | |
6231 | return -errno; | |
6232 | ||
6233 | if (chroot(".") < 0) | |
6234 | return -errno; | |
6235 | ||
6236 | if (chdir("/") < 0) | |
6237 | return -errno; | |
6238 | ||
6239 | return 0; | |
6240 | } | |
b4da6d6b LP |
6241 | |
6242 | int reset_uid_gid(void) { | |
6243 | ||
6244 | if (setgroups(0, NULL) < 0) | |
6245 | return -errno; | |
6246 | ||
6247 | if (setresgid(0, 0, 0) < 0) | |
6248 | return -errno; | |
6249 | ||
6250 | if (setresuid(0, 0, 0) < 0) | |
6251 | return -errno; | |
6252 | ||
6253 | return 0; | |
6254 | } |