]>
Commit | Line | Data |
---|---|---|
a5c32cff HH |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
11c3a366 TA |
20 | #include <errno.h> |
21 | #include <fcntl.h> | |
22 | #include <limits.h> | |
23 | #include <stdarg.h> | |
24 | #include <stdint.h> | |
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
27 | #include <sys/stat.h> | |
28 | #include <sys/types.h> | |
a5c32cff | 29 | #include <unistd.h> |
cda134ab | 30 | |
b5efdb8a | 31 | #include "alloc-util.h" |
4f5dd394 | 32 | #include "ctype.h" |
f4b51a2d | 33 | #include "def.h" |
99003e01 | 34 | #include "env-util.h" |
4f5dd394 | 35 | #include "escape.h" |
3ffd4af2 LP |
36 | #include "fd-util.h" |
37 | #include "fileio.h" | |
f4f15635 | 38 | #include "fs-util.h" |
0d39fa9c | 39 | #include "hexdecoct.h" |
93cc7779 TA |
40 | #include "log.h" |
41 | #include "macro.h" | |
1d9ed171 | 42 | #include "missing.h" |
33d52ab9 | 43 | #include "parse-util.h" |
0d39fa9c | 44 | #include "path-util.h" |
df0ff127 | 45 | #include "process-util.h" |
0d39fa9c | 46 | #include "random-util.h" |
33d52ab9 | 47 | #include "stdio-util.h" |
07630cea | 48 | #include "string-util.h" |
a5c32cff | 49 | #include "strv.h" |
93cc7779 | 50 | #include "time-util.h" |
affb60b1 | 51 | #include "umask-util.h" |
335c46b5 | 52 | #include "utf8.h" |
a5c32cff | 53 | |
c2d11a63 VC |
54 | #define READ_FULL_BYTES_MAX (4U*1024U*1024U) |
55 | ||
39c38d77 | 56 | int write_string_stream_ts(FILE *f, const char *line, bool enforce_newline, struct timespec *ts) { |
dacd6cee | 57 | |
717603e3 LP |
58 | assert(f); |
59 | assert(line); | |
60 | ||
fec6fc6b | 61 | fputs(line, f); |
40beecdb | 62 | if (enforce_newline && !endswith(line, "\n")) |
a5c32cff HH |
63 | fputc('\n', f); |
64 | ||
39c38d77 ZJS |
65 | if (ts) { |
66 | struct timespec twice[2] = {*ts, *ts}; | |
67 | ||
68 | if (futimens(fileno(f), twice) < 0) | |
69 | return -errno; | |
70 | } | |
71 | ||
dacd6cee | 72 | return fflush_and_check(f); |
a5c32cff HH |
73 | } |
74 | ||
265710c2 | 75 | static int write_string_file_atomic(const char *fn, const char *line, bool enforce_newline, bool do_fsync) { |
a5c32cff HH |
76 | _cleanup_fclose_ FILE *f = NULL; |
77 | _cleanup_free_ char *p = NULL; | |
78 | int r; | |
79 | ||
80 | assert(fn); | |
81 | assert(line); | |
82 | ||
83 | r = fopen_temporary(fn, &f, &p); | |
84 | if (r < 0) | |
85 | return r; | |
86 | ||
0d39fa9c | 87 | (void) fchmod_umask(fileno(f), 0644); |
a5c32cff | 88 | |
4c1fc3e4 | 89 | r = write_string_stream(f, line, enforce_newline); |
265710c2 | 90 | if (r >= 0 && do_fsync) |
0675e94a AJ |
91 | r = fflush_sync_and_check(f); |
92 | ||
f2997962 | 93 | if (r >= 0) { |
a5c32cff HH |
94 | if (rename(p, fn) < 0) |
95 | r = -errno; | |
a5c32cff HH |
96 | } |
97 | ||
a5c32cff | 98 | if (r < 0) |
0d39fa9c | 99 | (void) unlink(p); |
a5c32cff HH |
100 | |
101 | return r; | |
102 | } | |
103 | ||
39c38d77 | 104 | int write_string_file_ts(const char *fn, const char *line, WriteStringFileFlags flags, struct timespec *ts) { |
4c1fc3e4 | 105 | _cleanup_fclose_ FILE *f = NULL; |
eb3da901 | 106 | int q, r; |
4c1fc3e4 DM |
107 | |
108 | assert(fn); | |
109 | assert(line); | |
110 | ||
265710c2 AJ |
111 | /* We don't know how to verify whether the file contents was already on-disk. */ |
112 | assert(!((flags & WRITE_STRING_FILE_VERIFY_ON_FAILURE) && (flags & WRITE_STRING_FILE_SYNC))); | |
0675e94a | 113 | |
4c1fc3e4 DM |
114 | if (flags & WRITE_STRING_FILE_ATOMIC) { |
115 | assert(flags & WRITE_STRING_FILE_CREATE); | |
116 | ||
0675e94a AJ |
117 | r = write_string_file_atomic(fn, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE), |
118 | flags & WRITE_STRING_FILE_SYNC); | |
eb3da901 LP |
119 | if (r < 0) |
120 | goto fail; | |
121 | ||
122 | return r; | |
39c38d77 ZJS |
123 | } else |
124 | assert(ts == NULL); | |
4c1fc3e4 DM |
125 | |
126 | if (flags & WRITE_STRING_FILE_CREATE) { | |
127 | f = fopen(fn, "we"); | |
eb3da901 LP |
128 | if (!f) { |
129 | r = -errno; | |
130 | goto fail; | |
131 | } | |
4c1fc3e4 DM |
132 | } else { |
133 | int fd; | |
134 | ||
135 | /* We manually build our own version of fopen(..., "we") that | |
136 | * works without O_CREAT */ | |
137 | fd = open(fn, O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
eb3da901 LP |
138 | if (fd < 0) { |
139 | r = -errno; | |
140 | goto fail; | |
141 | } | |
4c1fc3e4 DM |
142 | |
143 | f = fdopen(fd, "we"); | |
144 | if (!f) { | |
eb3da901 | 145 | r = -errno; |
4c1fc3e4 | 146 | safe_close(fd); |
eb3da901 | 147 | goto fail; |
4c1fc3e4 DM |
148 | } |
149 | } | |
150 | ||
39c38d77 | 151 | r = write_string_stream_ts(f, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE), ts); |
eb3da901 LP |
152 | if (r < 0) |
153 | goto fail; | |
154 | ||
0675e94a AJ |
155 | if (flags & WRITE_STRING_FILE_SYNC) { |
156 | r = fflush_sync_and_check(f); | |
157 | if (r < 0) | |
158 | return r; | |
159 | } | |
160 | ||
eb3da901 LP |
161 | return 0; |
162 | ||
163 | fail: | |
164 | if (!(flags & WRITE_STRING_FILE_VERIFY_ON_FAILURE)) | |
165 | return r; | |
166 | ||
167 | f = safe_fclose(f); | |
168 | ||
169 | /* OK, the operation failed, but let's see if the right | |
170 | * contents in place already. If so, eat up the error. */ | |
171 | ||
172 | q = verify_file(fn, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE)); | |
173 | if (q <= 0) | |
174 | return r; | |
175 | ||
176 | return 0; | |
4c1fc3e4 DM |
177 | } |
178 | ||
a5c32cff HH |
179 | int read_one_line_file(const char *fn, char **line) { |
180 | _cleanup_fclose_ FILE *f = NULL; | |
a5c32cff HH |
181 | |
182 | assert(fn); | |
183 | assert(line); | |
184 | ||
185 | f = fopen(fn, "re"); | |
186 | if (!f) | |
187 | return -errno; | |
188 | ||
f4b51a2d | 189 | return read_line(f, LONG_LINE_MAX, line); |
a5c32cff HH |
190 | } |
191 | ||
eb3da901 LP |
192 | int verify_file(const char *fn, const char *blob, bool accept_extra_nl) { |
193 | _cleanup_fclose_ FILE *f = NULL; | |
194 | _cleanup_free_ char *buf = NULL; | |
195 | size_t l, k; | |
15dee3f0 | 196 | |
eb3da901 LP |
197 | assert(fn); |
198 | assert(blob); | |
199 | ||
200 | l = strlen(blob); | |
201 | ||
202 | if (accept_extra_nl && endswith(blob, "\n")) | |
203 | accept_extra_nl = false; | |
204 | ||
205 | buf = malloc(l + accept_extra_nl + 1); | |
206 | if (!buf) | |
207 | return -ENOMEM; | |
208 | ||
209 | f = fopen(fn, "re"); | |
210 | if (!f) | |
211 | return -errno; | |
212 | ||
213 | /* We try to read one byte more than we need, so that we know whether we hit eof */ | |
214 | errno = 0; | |
215 | k = fread(buf, 1, l + accept_extra_nl + 1, f); | |
216 | if (ferror(f)) | |
217 | return errno > 0 ? -errno : -EIO; | |
218 | ||
219 | if (k != l && k != l + accept_extra_nl) | |
220 | return 0; | |
221 | if (memcmp(buf, blob, l) != 0) | |
222 | return 0; | |
223 | if (k > l && buf[l] != '\n') | |
224 | return 0; | |
15dee3f0 | 225 | |
eb3da901 | 226 | return 1; |
15dee3f0 LP |
227 | } |
228 | ||
717603e3 | 229 | int read_full_stream(FILE *f, char **contents, size_t *size) { |
a5c32cff HH |
230 | size_t n, l; |
231 | _cleanup_free_ char *buf = NULL; | |
232 | struct stat st; | |
233 | ||
717603e3 | 234 | assert(f); |
a5c32cff HH |
235 | assert(contents); |
236 | ||
a5c32cff HH |
237 | if (fstat(fileno(f), &st) < 0) |
238 | return -errno; | |
239 | ||
717603e3 | 240 | n = LINE_MAX; |
a5c32cff | 241 | |
717603e3 LP |
242 | if (S_ISREG(st.st_mode)) { |
243 | ||
244 | /* Safety check */ | |
c2d11a63 | 245 | if (st.st_size > READ_FULL_BYTES_MAX) |
717603e3 LP |
246 | return -E2BIG; |
247 | ||
248 | /* Start with the right file size, but be prepared for | |
249 | * files from /proc which generally report a file size | |
250 | * of 0 */ | |
251 | if (st.st_size > 0) | |
252 | n = st.st_size; | |
253 | } | |
a5c32cff | 254 | |
717603e3 | 255 | l = 0; |
a5c32cff HH |
256 | for (;;) { |
257 | char *t; | |
258 | size_t k; | |
259 | ||
c2d11a63 | 260 | t = realloc(buf, n + 1); |
a5c32cff HH |
261 | if (!t) |
262 | return -ENOMEM; | |
263 | ||
264 | buf = t; | |
265 | k = fread(buf + l, 1, n - l, f); | |
c2d11a63 VC |
266 | if (k > 0) |
267 | l += k; | |
a5c32cff | 268 | |
c2d11a63 VC |
269 | if (ferror(f)) |
270 | return -errno; | |
a5c32cff | 271 | |
c2d11a63 | 272 | if (feof(f)) |
a5c32cff | 273 | break; |
a5c32cff | 274 | |
c2d11a63 VC |
275 | /* We aren't expecting fread() to return a short read outside |
276 | * of (error && eof), assert buffer is full and enlarge buffer. | |
277 | */ | |
278 | assert(l == n); | |
a5c32cff HH |
279 | |
280 | /* Safety check */ | |
c2d11a63 | 281 | if (n >= READ_FULL_BYTES_MAX) |
a5c32cff | 282 | return -E2BIG; |
c2d11a63 | 283 | |
82b103a7 | 284 | n = MIN(n * 2, READ_FULL_BYTES_MAX); |
a5c32cff HH |
285 | } |
286 | ||
287 | buf[l] = 0; | |
288 | *contents = buf; | |
d78a28e3 | 289 | buf = NULL; /* do not free */ |
a5c32cff HH |
290 | |
291 | if (size) | |
292 | *size = l; | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
717603e3 LP |
297 | int read_full_file(const char *fn, char **contents, size_t *size) { |
298 | _cleanup_fclose_ FILE *f = NULL; | |
299 | ||
300 | assert(fn); | |
301 | assert(contents); | |
302 | ||
303 | f = fopen(fn, "re"); | |
304 | if (!f) | |
305 | return -errno; | |
306 | ||
307 | return read_full_stream(f, contents, size); | |
308 | } | |
309 | ||
f73141d7 | 310 | static int parse_env_file_internal( |
717603e3 | 311 | FILE *f, |
a5c32cff | 312 | const char *fname, |
f73141d7 | 313 | const char *newline, |
335c46b5 | 314 | int (*push) (const char *filename, unsigned line, |
a5f6c30d MS |
315 | const char *key, char *value, void *userdata, int *n_pushed), |
316 | void *userdata, | |
317 | int *n_pushed) { | |
f73141d7 LP |
318 | |
319 | _cleanup_free_ char *contents = NULL, *key = NULL; | |
2b77f67e | 320 | size_t key_alloc = 0, n_key = 0, value_alloc = 0, n_value = 0, last_value_whitespace = (size_t) -1, last_key_whitespace = (size_t) -1; |
f73141d7 LP |
321 | char *p, *value = NULL; |
322 | int r; | |
335c46b5 | 323 | unsigned line = 1; |
a5c32cff | 324 | |
f73141d7 LP |
325 | enum { |
326 | PRE_KEY, | |
327 | KEY, | |
f73141d7 LP |
328 | PRE_VALUE, |
329 | VALUE, | |
330 | VALUE_ESCAPE, | |
331 | SINGLE_QUOTE_VALUE, | |
332 | SINGLE_QUOTE_VALUE_ESCAPE, | |
333 | DOUBLE_QUOTE_VALUE, | |
334 | DOUBLE_QUOTE_VALUE_ESCAPE, | |
335 | COMMENT, | |
336 | COMMENT_ESCAPE | |
337 | } state = PRE_KEY; | |
a5c32cff | 338 | |
f73141d7 | 339 | assert(newline); |
a5c32cff | 340 | |
717603e3 LP |
341 | if (f) |
342 | r = read_full_stream(f, &contents, NULL); | |
343 | else | |
344 | r = read_full_file(fname, &contents, NULL); | |
1c17cbed | 345 | if (r < 0) |
a5c32cff HH |
346 | return r; |
347 | ||
f73141d7 LP |
348 | for (p = contents; *p; p++) { |
349 | char c = *p; | |
350 | ||
351 | switch (state) { | |
352 | ||
353 | case PRE_KEY: | |
ebc05a09 | 354 | if (strchr(COMMENTS, c)) |
f73141d7 LP |
355 | state = COMMENT; |
356 | else if (!strchr(WHITESPACE, c)) { | |
357 | state = KEY; | |
2b77f67e LP |
358 | last_key_whitespace = (size_t) -1; |
359 | ||
ca2d3784 | 360 | if (!GREEDY_REALLOC(key, key_alloc, n_key+2)) { |
f73141d7 LP |
361 | r = -ENOMEM; |
362 | goto fail; | |
363 | } | |
364 | ||
365 | key[n_key++] = c; | |
366 | } | |
367 | break; | |
368 | ||
369 | case KEY: | |
370 | if (strchr(newline, c)) { | |
371 | state = PRE_KEY; | |
313cefa1 | 372 | line++; |
f73141d7 | 373 | n_key = 0; |
2b77f67e | 374 | } else if (c == '=') { |
f73141d7 | 375 | state = PRE_VALUE; |
2b77f67e LP |
376 | last_value_whitespace = (size_t) -1; |
377 | } else { | |
378 | if (!strchr(WHITESPACE, c)) | |
379 | last_key_whitespace = (size_t) -1; | |
380 | else if (last_key_whitespace == (size_t) -1) | |
381 | last_key_whitespace = n_key; | |
382 | ||
ca2d3784 | 383 | if (!GREEDY_REALLOC(key, key_alloc, n_key+2)) { |
f73141d7 LP |
384 | r = -ENOMEM; |
385 | goto fail; | |
386 | } | |
387 | ||
388 | key[n_key++] = c; | |
389 | } | |
a5c32cff | 390 | |
f73141d7 LP |
391 | break; |
392 | ||
f73141d7 | 393 | case PRE_VALUE: |
98f59e59 | 394 | if (strchr(newline, c)) { |
f73141d7 | 395 | state = PRE_KEY; |
313cefa1 | 396 | line++; |
f73141d7 | 397 | key[n_key] = 0; |
a5c32cff | 398 | |
f73141d7 LP |
399 | if (value) |
400 | value[n_value] = 0; | |
a5c32cff | 401 | |
ebc05a09 | 402 | /* strip trailing whitespace from key */ |
2b77f67e LP |
403 | if (last_key_whitespace != (size_t) -1) |
404 | key[last_key_whitespace] = 0; | |
ebc05a09 | 405 | |
a5f6c30d | 406 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 LP |
407 | if (r < 0) |
408 | goto fail; | |
409 | ||
410 | n_key = 0; | |
411 | value = NULL; | |
412 | value_alloc = n_value = 0; | |
2b77f67e | 413 | |
f73141d7 LP |
414 | } else if (c == '\'') |
415 | state = SINGLE_QUOTE_VALUE; | |
416 | else if (c == '\"') | |
417 | state = DOUBLE_QUOTE_VALUE; | |
418 | else if (c == '\\') | |
419 | state = VALUE_ESCAPE; | |
420 | else if (!strchr(WHITESPACE, c)) { | |
421 | state = VALUE; | |
422 | ||
ca2d3784 | 423 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
424 | r = -ENOMEM; |
425 | goto fail; | |
426 | } | |
427 | ||
428 | value[n_value++] = c; | |
429 | } | |
430 | ||
431 | break; | |
432 | ||
433 | case VALUE: | |
434 | if (strchr(newline, c)) { | |
435 | state = PRE_KEY; | |
313cefa1 | 436 | line++; |
98f59e59 | 437 | |
f73141d7 LP |
438 | key[n_key] = 0; |
439 | ||
440 | if (value) | |
441 | value[n_value] = 0; | |
442 | ||
2b77f67e LP |
443 | /* Chomp off trailing whitespace from value */ |
444 | if (last_value_whitespace != (size_t) -1) | |
445 | value[last_value_whitespace] = 0; | |
f73141d7 | 446 | |
ebc05a09 | 447 | /* strip trailing whitespace from key */ |
2b77f67e LP |
448 | if (last_key_whitespace != (size_t) -1) |
449 | key[last_key_whitespace] = 0; | |
ebc05a09 | 450 | |
a5f6c30d | 451 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 LP |
452 | if (r < 0) |
453 | goto fail; | |
454 | ||
455 | n_key = 0; | |
456 | value = NULL; | |
457 | value_alloc = n_value = 0; | |
2b77f67e | 458 | |
f73141d7 LP |
459 | } else if (c == '\\') { |
460 | state = VALUE_ESCAPE; | |
2b77f67e | 461 | last_value_whitespace = (size_t) -1; |
f73141d7 LP |
462 | } else { |
463 | if (!strchr(WHITESPACE, c)) | |
2b77f67e LP |
464 | last_value_whitespace = (size_t) -1; |
465 | else if (last_value_whitespace == (size_t) -1) | |
466 | last_value_whitespace = n_value; | |
f73141d7 | 467 | |
ca2d3784 | 468 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
469 | r = -ENOMEM; |
470 | goto fail; | |
471 | } | |
472 | ||
473 | value[n_value++] = c; | |
474 | } | |
475 | ||
476 | break; | |
477 | ||
478 | case VALUE_ESCAPE: | |
479 | state = VALUE; | |
480 | ||
481 | if (!strchr(newline, c)) { | |
482 | /* Escaped newlines we eat up entirely */ | |
ca2d3784 | 483 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
484 | r = -ENOMEM; |
485 | goto fail; | |
486 | } | |
487 | ||
488 | value[n_value++] = c; | |
489 | } | |
490 | break; | |
491 | ||
492 | case SINGLE_QUOTE_VALUE: | |
493 | if (c == '\'') | |
494 | state = PRE_VALUE; | |
495 | else if (c == '\\') | |
496 | state = SINGLE_QUOTE_VALUE_ESCAPE; | |
497 | else { | |
ca2d3784 | 498 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
499 | r = -ENOMEM; |
500 | goto fail; | |
501 | } | |
a5c32cff | 502 | |
f73141d7 LP |
503 | value[n_value++] = c; |
504 | } | |
a5c32cff | 505 | |
f73141d7 | 506 | break; |
a5c32cff | 507 | |
f73141d7 LP |
508 | case SINGLE_QUOTE_VALUE_ESCAPE: |
509 | state = SINGLE_QUOTE_VALUE; | |
a5c32cff | 510 | |
f73141d7 | 511 | if (!strchr(newline, c)) { |
ca2d3784 | 512 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
a5c32cff | 513 | r = -ENOMEM; |
a5c32cff HH |
514 | goto fail; |
515 | } | |
516 | ||
f73141d7 LP |
517 | value[n_value++] = c; |
518 | } | |
519 | break; | |
520 | ||
521 | case DOUBLE_QUOTE_VALUE: | |
522 | if (c == '\"') | |
523 | state = PRE_VALUE; | |
524 | else if (c == '\\') | |
525 | state = DOUBLE_QUOTE_VALUE_ESCAPE; | |
526 | else { | |
ca2d3784 | 527 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
528 | r = -ENOMEM; |
529 | goto fail; | |
a5c32cff HH |
530 | } |
531 | ||
f73141d7 LP |
532 | value[n_value++] = c; |
533 | } | |
534 | ||
535 | break; | |
536 | ||
537 | case DOUBLE_QUOTE_VALUE_ESCAPE: | |
538 | state = DOUBLE_QUOTE_VALUE; | |
a5c32cff | 539 | |
f73141d7 | 540 | if (!strchr(newline, c)) { |
ca2d3784 | 541 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
542 | r = -ENOMEM; |
543 | goto fail; | |
544 | } | |
a5c32cff | 545 | |
f73141d7 | 546 | value[n_value++] = c; |
a5c32cff | 547 | } |
f73141d7 LP |
548 | break; |
549 | ||
550 | case COMMENT: | |
551 | if (c == '\\') | |
552 | state = COMMENT_ESCAPE; | |
335c46b5 | 553 | else if (strchr(newline, c)) { |
f73141d7 | 554 | state = PRE_KEY; |
313cefa1 | 555 | line++; |
335c46b5 | 556 | } |
f73141d7 LP |
557 | break; |
558 | ||
559 | case COMMENT_ESCAPE: | |
560 | state = COMMENT; | |
561 | break; | |
a5c32cff | 562 | } |
f73141d7 LP |
563 | } |
564 | ||
371328dc ZJS |
565 | if (IN_SET(state, |
566 | PRE_VALUE, | |
567 | VALUE, | |
568 | VALUE_ESCAPE, | |
569 | SINGLE_QUOTE_VALUE, | |
570 | SINGLE_QUOTE_VALUE_ESCAPE, | |
571 | DOUBLE_QUOTE_VALUE, | |
572 | DOUBLE_QUOTE_VALUE_ESCAPE)) { | |
a5c32cff | 573 | |
f73141d7 LP |
574 | key[n_key] = 0; |
575 | ||
576 | if (value) | |
577 | value[n_value] = 0; | |
578 | ||
2b77f67e LP |
579 | if (state == VALUE) |
580 | if (last_value_whitespace != (size_t) -1) | |
581 | value[last_value_whitespace] = 0; | |
582 | ||
ebc05a09 | 583 | /* strip trailing whitespace from key */ |
2b77f67e LP |
584 | if (last_key_whitespace != (size_t) -1) |
585 | key[last_key_whitespace] = 0; | |
ebc05a09 | 586 | |
a5f6c30d | 587 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 LP |
588 | if (r < 0) |
589 | goto fail; | |
a5c32cff HH |
590 | } |
591 | ||
f73141d7 LP |
592 | return 0; |
593 | ||
a5c32cff | 594 | fail: |
f73141d7 | 595 | free(value); |
a5c32cff HH |
596 | return r; |
597 | } | |
598 | ||
ac466818 | 599 | static int check_utf8ness_and_warn( |
717603e3 | 600 | const char *filename, unsigned line, |
ac466818 | 601 | const char *key, char *value) { |
f27f0e21 GB |
602 | |
603 | if (!utf8_is_valid(key)) { | |
3587161a | 604 | _cleanup_free_ char *p = NULL; |
550a40ec | 605 | |
717603e3 LP |
606 | p = utf8_escape_invalid(key); |
607 | log_error("%s:%u: invalid UTF-8 in key '%s', ignoring.", strna(filename), line, p); | |
f27f0e21 GB |
608 | return -EINVAL; |
609 | } | |
610 | ||
611 | if (value && !utf8_is_valid(value)) { | |
3587161a | 612 | _cleanup_free_ char *p = NULL; |
550a40ec | 613 | |
717603e3 LP |
614 | p = utf8_escape_invalid(value); |
615 | log_error("%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.", strna(filename), line, key, p); | |
f27f0e21 GB |
616 | return -EINVAL; |
617 | } | |
a5c32cff | 618 | |
ac466818 ZJS |
619 | return 0; |
620 | } | |
621 | ||
622 | static int parse_env_file_push( | |
623 | const char *filename, unsigned line, | |
624 | const char *key, char *value, | |
625 | void *userdata, | |
626 | int *n_pushed) { | |
627 | ||
628 | const char *k; | |
629 | va_list aq, *ap = userdata; | |
630 | int r; | |
631 | ||
632 | r = check_utf8ness_and_warn(filename, line, key, value); | |
633 | if (r < 0) | |
634 | return r; | |
635 | ||
f27f0e21 | 636 | va_copy(aq, *ap); |
a5c32cff | 637 | |
f27f0e21 GB |
638 | while ((k = va_arg(aq, const char *))) { |
639 | char **v; | |
a5c32cff | 640 | |
f27f0e21 | 641 | v = va_arg(aq, char **); |
a5c32cff | 642 | |
f27f0e21 GB |
643 | if (streq(key, k)) { |
644 | va_end(aq); | |
645 | free(*v); | |
646 | *v = value; | |
a5f6c30d MS |
647 | |
648 | if (n_pushed) | |
649 | (*n_pushed)++; | |
650 | ||
f27f0e21 | 651 | return 1; |
f73141d7 | 652 | } |
335c46b5 | 653 | } |
a5c32cff | 654 | |
f27f0e21 | 655 | va_end(aq); |
f73141d7 | 656 | free(value); |
717603e3 | 657 | |
f73141d7 LP |
658 | return 0; |
659 | } | |
a5c32cff | 660 | |
f73141d7 LP |
661 | int parse_env_file( |
662 | const char *fname, | |
663 | const char *newline, ...) { | |
a5c32cff | 664 | |
f73141d7 | 665 | va_list ap; |
a5f6c30d | 666 | int r, n_pushed = 0; |
a5c32cff | 667 | |
f73141d7 LP |
668 | if (!newline) |
669 | newline = NEWLINE; | |
a5c32cff | 670 | |
f73141d7 | 671 | va_start(ap, newline); |
a5f6c30d | 672 | r = parse_env_file_internal(NULL, fname, newline, parse_env_file_push, &ap, &n_pushed); |
f73141d7 | 673 | va_end(ap); |
a5c32cff | 674 | |
a5f6c30d | 675 | return r < 0 ? r : n_pushed; |
f73141d7 | 676 | } |
a5c32cff | 677 | |
717603e3 LP |
678 | static int load_env_file_push( |
679 | const char *filename, unsigned line, | |
680 | const char *key, char *value, | |
a5f6c30d MS |
681 | void *userdata, |
682 | int *n_pushed) { | |
f27f0e21 GB |
683 | char ***m = userdata; |
684 | char *p; | |
685 | int r; | |
a5c32cff | 686 | |
ac466818 ZJS |
687 | r = check_utf8ness_and_warn(filename, line, key, value); |
688 | if (r < 0) | |
689 | return r; | |
a5c32cff | 690 | |
99003e01 | 691 | p = strjoin(key, "=", value); |
f27f0e21 GB |
692 | if (!p) |
693 | return -ENOMEM; | |
335c46b5 | 694 | |
99003e01 ZJS |
695 | r = strv_env_replace(m, p); |
696 | if (r < 0) { | |
697 | free(p); | |
f27f0e21 | 698 | return r; |
99003e01 | 699 | } |
a5c32cff | 700 | |
a5f6c30d MS |
701 | if (n_pushed) |
702 | (*n_pushed)++; | |
703 | ||
f73141d7 LP |
704 | free(value); |
705 | return 0; | |
706 | } | |
707 | ||
717603e3 LP |
708 | int load_env_file(FILE *f, const char *fname, const char *newline, char ***rl) { |
709 | char **m = NULL; | |
710 | int r; | |
711 | ||
712 | if (!newline) | |
713 | newline = NEWLINE; | |
714 | ||
a5f6c30d | 715 | r = parse_env_file_internal(f, fname, newline, load_env_file_push, &m, NULL); |
717603e3 LP |
716 | if (r < 0) { |
717 | strv_free(m); | |
718 | return r; | |
719 | } | |
720 | ||
721 | *rl = m; | |
722 | return 0; | |
723 | } | |
724 | ||
725 | static int load_env_file_push_pairs( | |
726 | const char *filename, unsigned line, | |
727 | const char *key, char *value, | |
a5f6c30d MS |
728 | void *userdata, |
729 | int *n_pushed) { | |
717603e3 LP |
730 | char ***m = userdata; |
731 | int r; | |
732 | ||
ac466818 ZJS |
733 | r = check_utf8ness_and_warn(filename, line, key, value); |
734 | if (r < 0) | |
735 | return r; | |
717603e3 LP |
736 | |
737 | r = strv_extend(m, key); | |
738 | if (r < 0) | |
739 | return -ENOMEM; | |
740 | ||
741 | if (!value) { | |
742 | r = strv_extend(m, ""); | |
743 | if (r < 0) | |
744 | return -ENOMEM; | |
745 | } else { | |
746 | r = strv_push(m, value); | |
747 | if (r < 0) | |
748 | return r; | |
749 | } | |
750 | ||
a5f6c30d MS |
751 | if (n_pushed) |
752 | (*n_pushed)++; | |
753 | ||
717603e3 LP |
754 | return 0; |
755 | } | |
756 | ||
757 | int load_env_file_pairs(FILE *f, const char *fname, const char *newline, char ***rl) { | |
f73141d7 LP |
758 | char **m = NULL; |
759 | int r; | |
a5c32cff | 760 | |
f73141d7 LP |
761 | if (!newline) |
762 | newline = NEWLINE; | |
763 | ||
a5f6c30d | 764 | r = parse_env_file_internal(f, fname, newline, load_env_file_push_pairs, &m, NULL); |
f73141d7 LP |
765 | if (r < 0) { |
766 | strv_free(m); | |
767 | return r; | |
a5c32cff HH |
768 | } |
769 | ||
770 | *rl = m; | |
a5c32cff HH |
771 | return 0; |
772 | } | |
773 | ||
37f3ffca RS |
774 | static int merge_env_file_push( |
775 | const char *filename, unsigned line, | |
776 | const char *key, char *value, | |
777 | void *userdata, | |
778 | int *n_pushed) { | |
779 | ||
780 | char ***env = userdata; | |
781 | char *expanded_value; | |
782 | ||
783 | assert(env); | |
784 | ||
184d1904 ZJS |
785 | if (!value) { |
786 | log_error("%s:%u: invalid syntax (around \"%s\"), ignoring.", strna(filename), line, key); | |
787 | return 0; | |
788 | } | |
789 | ||
790 | if (!env_name_is_valid(key)) { | |
791 | log_error("%s:%u: invalid variable name \"%s\", ignoring.", strna(filename), line, key); | |
2ea8081a | 792 | free(value); |
184d1904 ZJS |
793 | return 0; |
794 | } | |
795 | ||
ccad1fd0 | 796 | expanded_value = replace_env(value, *env, |
b82f58bf RS |
797 | REPLACE_ENV_USE_ENVIRONMENT| |
798 | REPLACE_ENV_ALLOW_BRACELESS| | |
799 | REPLACE_ENV_ALLOW_EXTENDED); | |
37f3ffca RS |
800 | if (!expanded_value) |
801 | return -ENOMEM; | |
802 | ||
803 | free_and_replace(value, expanded_value); | |
804 | ||
805 | return load_env_file_push(filename, line, key, value, env, n_pushed); | |
806 | } | |
807 | ||
808 | int merge_env_file( | |
809 | char ***env, | |
810 | FILE *f, | |
811 | const char *fname) { | |
812 | ||
ccad1fd0 | 813 | /* NOTE: this function supports braceful and braceless variable expansions, |
b82f58bf | 814 | * plus "extended" substitutions, unlike other exported parsing functions. |
ccad1fd0 ZJS |
815 | */ |
816 | ||
37f3ffca RS |
817 | return parse_env_file_internal(f, fname, NEWLINE, merge_env_file_push, env, NULL); |
818 | } | |
819 | ||
768100ef LP |
820 | static void write_env_var(FILE *f, const char *v) { |
821 | const char *p; | |
822 | ||
823 | p = strchr(v, '='); | |
824 | if (!p) { | |
825 | /* Fallback */ | |
4b61c875 LP |
826 | fputs_unlocked(v, f); |
827 | fputc_unlocked('\n', f); | |
768100ef LP |
828 | return; |
829 | } | |
830 | ||
831 | p++; | |
4b61c875 | 832 | fwrite_unlocked(v, 1, p-v, f); |
768100ef | 833 | |
0ce5a806 | 834 | if (string_has_cc(p, NULL) || chars_intersect(p, WHITESPACE SHELL_NEED_QUOTES)) { |
4b61c875 | 835 | fputc_unlocked('\"', f); |
768100ef LP |
836 | |
837 | for (; *p; p++) { | |
0ce5a806 | 838 | if (strchr(SHELL_NEED_ESCAPE, *p)) |
4b61c875 | 839 | fputc_unlocked('\\', f); |
768100ef | 840 | |
4b61c875 | 841 | fputc_unlocked(*p, f); |
768100ef LP |
842 | } |
843 | ||
4b61c875 | 844 | fputc_unlocked('\"', f); |
768100ef | 845 | } else |
4b61c875 | 846 | fputs_unlocked(p, f); |
768100ef | 847 | |
4b61c875 | 848 | fputc_unlocked('\n', f); |
768100ef LP |
849 | } |
850 | ||
a5c32cff | 851 | int write_env_file(const char *fname, char **l) { |
7fd1b19b | 852 | _cleanup_fclose_ FILE *f = NULL; |
736937e5 LP |
853 | _cleanup_free_ char *p = NULL; |
854 | char **i; | |
a5c32cff HH |
855 | int r; |
856 | ||
736937e5 LP |
857 | assert(fname); |
858 | ||
a5c32cff HH |
859 | r = fopen_temporary(fname, &f, &p); |
860 | if (r < 0) | |
861 | return r; | |
862 | ||
863 | fchmod_umask(fileno(f), 0644); | |
864 | ||
768100ef LP |
865 | STRV_FOREACH(i, l) |
866 | write_env_var(f, *i); | |
a5c32cff | 867 | |
736937e5 LP |
868 | r = fflush_and_check(f); |
869 | if (r >= 0) { | |
870 | if (rename(p, fname) >= 0) | |
871 | return 0; | |
a5c32cff | 872 | |
736937e5 | 873 | r = -errno; |
a5c32cff HH |
874 | } |
875 | ||
736937e5 | 876 | unlink(p); |
a5c32cff HH |
877 | return r; |
878 | } | |
68fee104 ZJS |
879 | |
880 | int executable_is_script(const char *path, char **interpreter) { | |
881 | int r; | |
c8b32e11 | 882 | _cleanup_free_ char *line = NULL; |
68fee104 ZJS |
883 | int len; |
884 | char *ans; | |
885 | ||
886 | assert(path); | |
887 | ||
888 | r = read_one_line_file(path, &line); | |
889 | if (r < 0) | |
890 | return r; | |
891 | ||
892 | if (!startswith(line, "#!")) | |
893 | return 0; | |
894 | ||
895 | ans = strstrip(line + 2); | |
896 | len = strcspn(ans, " \t"); | |
897 | ||
898 | if (len == 0) | |
899 | return 0; | |
900 | ||
901 | ans = strndup(ans, len); | |
902 | if (!ans) | |
903 | return -ENOMEM; | |
904 | ||
905 | *interpreter = ans; | |
906 | return 1; | |
907 | } | |
69ab8088 ZJS |
908 | |
909 | /** | |
0a7b53bd | 910 | * Retrieve one field from a file like /proc/self/status. pattern |
c4cd1d4d AK |
911 | * should not include whitespace or the delimiter (':'). pattern matches only |
912 | * the beginning of a line. Whitespace before ':' is skipped. Whitespace and | |
913 | * zeros after the ':' will be skipped. field must be freed afterwards. | |
914 | * terminator specifies the terminating characters of the field value (not | |
915 | * included in the value). | |
69ab8088 | 916 | */ |
c4cd1d4d | 917 | int get_proc_field(const char *filename, const char *pattern, const char *terminator, char **field) { |
69ab8088 | 918 | _cleanup_free_ char *status = NULL; |
90110825 | 919 | char *t, *f; |
69ab8088 ZJS |
920 | size_t len; |
921 | int r; | |
922 | ||
c4cd1d4d | 923 | assert(terminator); |
69ab8088 | 924 | assert(filename); |
7ff7394d | 925 | assert(pattern); |
69ab8088 ZJS |
926 | assert(field); |
927 | ||
928 | r = read_full_file(filename, &status, NULL); | |
929 | if (r < 0) | |
930 | return r; | |
931 | ||
c4cd1d4d AK |
932 | t = status; |
933 | ||
934 | do { | |
935 | bool pattern_ok; | |
936 | ||
937 | do { | |
938 | t = strstr(t, pattern); | |
939 | if (!t) | |
940 | return -ENOENT; | |
941 | ||
942 | /* Check that pattern occurs in beginning of line. */ | |
943 | pattern_ok = (t == status || t[-1] == '\n'); | |
944 | ||
945 | t += strlen(pattern); | |
946 | ||
947 | } while (!pattern_ok); | |
948 | ||
949 | t += strspn(t, " \t"); | |
950 | if (!*t) | |
951 | return -ENOENT; | |
952 | ||
953 | } while (*t != ':'); | |
954 | ||
955 | t++; | |
69ab8088 | 956 | |
4ec29144 | 957 | if (*t) { |
1e5413f7 ZJS |
958 | t += strspn(t, " \t"); |
959 | ||
960 | /* Also skip zeros, because when this is used for | |
961 | * capabilities, we don't want the zeros. This way the | |
962 | * same capability set always maps to the same string, | |
963 | * irrespective of the total capability set size. For | |
964 | * other numbers it shouldn't matter. */ | |
965 | t += strspn(t, "0"); | |
4ec29144 ZJS |
966 | /* Back off one char if there's nothing but whitespace |
967 | and zeros */ | |
1e5413f7 | 968 | if (!*t || isspace(*t)) |
313cefa1 | 969 | t--; |
4ec29144 | 970 | } |
69ab8088 | 971 | |
c4cd1d4d | 972 | len = strcspn(t, terminator); |
69ab8088 | 973 | |
90110825 LP |
974 | f = strndup(t, len); |
975 | if (!f) | |
69ab8088 ZJS |
976 | return -ENOMEM; |
977 | ||
90110825 | 978 | *field = f; |
69ab8088 ZJS |
979 | return 0; |
980 | } | |
0d39fa9c LP |
981 | |
982 | DIR *xopendirat(int fd, const char *name, int flags) { | |
983 | int nfd; | |
984 | DIR *d; | |
985 | ||
986 | assert(!(flags & O_CREAT)); | |
987 | ||
988 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
989 | if (nfd < 0) | |
990 | return NULL; | |
991 | ||
992 | d = fdopendir(nfd); | |
993 | if (!d) { | |
994 | safe_close(nfd); | |
995 | return NULL; | |
996 | } | |
997 | ||
998 | return d; | |
999 | } | |
1000 | ||
1001 | static int search_and_fopen_internal(const char *path, const char *mode, const char *root, char **search, FILE **_f) { | |
1002 | char **i; | |
1003 | ||
1004 | assert(path); | |
1005 | assert(mode); | |
1006 | assert(_f); | |
1007 | ||
1008 | if (!path_strv_resolve_uniq(search, root)) | |
1009 | return -ENOMEM; | |
1010 | ||
1011 | STRV_FOREACH(i, search) { | |
1012 | _cleanup_free_ char *p = NULL; | |
1013 | FILE *f; | |
1014 | ||
1015 | if (root) | |
605405c6 | 1016 | p = strjoin(root, *i, "/", path); |
0d39fa9c | 1017 | else |
605405c6 | 1018 | p = strjoin(*i, "/", path); |
0d39fa9c LP |
1019 | if (!p) |
1020 | return -ENOMEM; | |
1021 | ||
1022 | f = fopen(p, mode); | |
1023 | if (f) { | |
1024 | *_f = f; | |
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | if (errno != ENOENT) | |
1029 | return -errno; | |
1030 | } | |
1031 | ||
1032 | return -ENOENT; | |
1033 | } | |
1034 | ||
1035 | int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f) { | |
1036 | _cleanup_strv_free_ char **copy = NULL; | |
1037 | ||
1038 | assert(path); | |
1039 | assert(mode); | |
1040 | assert(_f); | |
1041 | ||
1042 | if (path_is_absolute(path)) { | |
1043 | FILE *f; | |
1044 | ||
1045 | f = fopen(path, mode); | |
1046 | if (f) { | |
1047 | *_f = f; | |
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | return -errno; | |
1052 | } | |
1053 | ||
1054 | copy = strv_copy((char**) search); | |
1055 | if (!copy) | |
1056 | return -ENOMEM; | |
1057 | ||
1058 | return search_and_fopen_internal(path, mode, root, copy, _f); | |
1059 | } | |
1060 | ||
1061 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f) { | |
1062 | _cleanup_strv_free_ char **s = NULL; | |
1063 | ||
1064 | if (path_is_absolute(path)) { | |
1065 | FILE *f; | |
1066 | ||
1067 | f = fopen(path, mode); | |
1068 | if (f) { | |
1069 | *_f = f; | |
1070 | return 0; | |
1071 | } | |
1072 | ||
1073 | return -errno; | |
1074 | } | |
1075 | ||
1076 | s = strv_split_nulstr(search); | |
1077 | if (!s) | |
1078 | return -ENOMEM; | |
1079 | ||
1080 | return search_and_fopen_internal(path, mode, root, s, _f); | |
1081 | } | |
1082 | ||
1083 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { | |
1084 | FILE *f; | |
1085 | char *t; | |
1086 | int r, fd; | |
1087 | ||
1088 | assert(path); | |
1089 | assert(_f); | |
1090 | assert(_temp_path); | |
1091 | ||
1092 | r = tempfn_xxxxxx(path, NULL, &t); | |
1093 | if (r < 0) | |
1094 | return r; | |
1095 | ||
646853bd | 1096 | fd = mkostemp_safe(t); |
0d39fa9c LP |
1097 | if (fd < 0) { |
1098 | free(t); | |
1099 | return -errno; | |
1100 | } | |
1101 | ||
1102 | f = fdopen(fd, "we"); | |
1103 | if (!f) { | |
1104 | unlink_noerrno(t); | |
1105 | free(t); | |
1106 | safe_close(fd); | |
1107 | return -errno; | |
1108 | } | |
1109 | ||
1110 | *_f = f; | |
1111 | *_temp_path = t; | |
1112 | ||
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | int fflush_and_check(FILE *f) { | |
1117 | assert(f); | |
1118 | ||
1119 | errno = 0; | |
1120 | fflush(f); | |
1121 | ||
1122 | if (ferror(f)) | |
f5e5c28f | 1123 | return errno > 0 ? -errno : -EIO; |
0d39fa9c LP |
1124 | |
1125 | return 0; | |
1126 | } | |
1127 | ||
0675e94a AJ |
1128 | int fflush_sync_and_check(FILE *f) { |
1129 | int r; | |
1130 | ||
1131 | assert(f); | |
1132 | ||
1133 | r = fflush_and_check(f); | |
1134 | if (r < 0) | |
1135 | return r; | |
1136 | ||
1137 | if (fsync(fileno(f)) < 0) | |
1138 | return -errno; | |
1139 | ||
1140 | return 0; | |
1141 | } | |
1142 | ||
61233823 | 1143 | /* This is much like mkostemp() but is subject to umask(). */ |
646853bd | 1144 | int mkostemp_safe(char *pattern) { |
3587161a | 1145 | _cleanup_umask_ mode_t u = 0; |
0d39fa9c LP |
1146 | int fd; |
1147 | ||
1148 | assert(pattern); | |
1149 | ||
1150 | u = umask(077); | |
1151 | ||
646853bd | 1152 | fd = mkostemp(pattern, O_CLOEXEC); |
0d39fa9c LP |
1153 | if (fd < 0) |
1154 | return -errno; | |
1155 | ||
1156 | return fd; | |
1157 | } | |
1158 | ||
0d39fa9c LP |
1159 | int tempfn_xxxxxx(const char *p, const char *extra, char **ret) { |
1160 | const char *fn; | |
1161 | char *t; | |
1162 | ||
1163 | assert(p); | |
1164 | assert(ret); | |
1165 | ||
1166 | /* | |
1167 | * Turns this: | |
1168 | * /foo/bar/waldo | |
1169 | * | |
1170 | * Into this: | |
1171 | * /foo/bar/.#<extra>waldoXXXXXX | |
1172 | */ | |
1173 | ||
1174 | fn = basename(p); | |
1175 | if (!filename_is_valid(fn)) | |
1176 | return -EINVAL; | |
1177 | ||
1178 | if (extra == NULL) | |
1179 | extra = ""; | |
1180 | ||
1181 | t = new(char, strlen(p) + 2 + strlen(extra) + 6 + 1); | |
1182 | if (!t) | |
1183 | return -ENOMEM; | |
1184 | ||
1185 | strcpy(stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn), "XXXXXX"); | |
1186 | ||
1187 | *ret = path_kill_slashes(t); | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | int tempfn_random(const char *p, const char *extra, char **ret) { | |
1192 | const char *fn; | |
1193 | char *t, *x; | |
1194 | uint64_t u; | |
1195 | unsigned i; | |
1196 | ||
1197 | assert(p); | |
1198 | assert(ret); | |
1199 | ||
1200 | /* | |
1201 | * Turns this: | |
1202 | * /foo/bar/waldo | |
1203 | * | |
1204 | * Into this: | |
1205 | * /foo/bar/.#<extra>waldobaa2a261115984a9 | |
1206 | */ | |
1207 | ||
1208 | fn = basename(p); | |
1209 | if (!filename_is_valid(fn)) | |
1210 | return -EINVAL; | |
1211 | ||
1212 | if (!extra) | |
1213 | extra = ""; | |
1214 | ||
1215 | t = new(char, strlen(p) + 2 + strlen(extra) + 16 + 1); | |
1216 | if (!t) | |
1217 | return -ENOMEM; | |
1218 | ||
1219 | x = stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn); | |
1220 | ||
1221 | u = random_u64(); | |
1222 | for (i = 0; i < 16; i++) { | |
1223 | *(x++) = hexchar(u & 0xF); | |
1224 | u >>= 4; | |
1225 | } | |
1226 | ||
1227 | *x = 0; | |
1228 | ||
1229 | *ret = path_kill_slashes(t); | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | int tempfn_random_child(const char *p, const char *extra, char **ret) { | |
1234 | char *t, *x; | |
1235 | uint64_t u; | |
1236 | unsigned i; | |
992e8f22 | 1237 | int r; |
0d39fa9c | 1238 | |
0d39fa9c LP |
1239 | assert(ret); |
1240 | ||
1241 | /* Turns this: | |
1242 | * /foo/bar/waldo | |
1243 | * Into this: | |
1244 | * /foo/bar/waldo/.#<extra>3c2b6219aa75d7d0 | |
1245 | */ | |
1246 | ||
992e8f22 LP |
1247 | if (!p) { |
1248 | r = tmp_dir(&p); | |
1249 | if (r < 0) | |
1250 | return r; | |
1251 | } | |
1252 | ||
0d39fa9c LP |
1253 | if (!extra) |
1254 | extra = ""; | |
1255 | ||
1256 | t = new(char, strlen(p) + 3 + strlen(extra) + 16 + 1); | |
1257 | if (!t) | |
1258 | return -ENOMEM; | |
1259 | ||
1260 | x = stpcpy(stpcpy(stpcpy(t, p), "/.#"), extra); | |
1261 | ||
1262 | u = random_u64(); | |
1263 | for (i = 0; i < 16; i++) { | |
1264 | *(x++) = hexchar(u & 0xF); | |
1265 | u >>= 4; | |
1266 | } | |
1267 | ||
1268 | *x = 0; | |
1269 | ||
1270 | *ret = path_kill_slashes(t); | |
1271 | return 0; | |
1272 | } | |
33d52ab9 LP |
1273 | |
1274 | int write_timestamp_file_atomic(const char *fn, usec_t n) { | |
1275 | char ln[DECIMAL_STR_MAX(n)+2]; | |
1276 | ||
1277 | /* Creates a "timestamp" file, that contains nothing but a | |
1278 | * usec_t timestamp, formatted in ASCII. */ | |
1279 | ||
1280 | if (n <= 0 || n >= USEC_INFINITY) | |
1281 | return -ERANGE; | |
1282 | ||
1283 | xsprintf(ln, USEC_FMT "\n", n); | |
1284 | ||
1285 | return write_string_file(fn, ln, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC); | |
1286 | } | |
1287 | ||
1288 | int read_timestamp_file(const char *fn, usec_t *ret) { | |
1289 | _cleanup_free_ char *ln = NULL; | |
1290 | uint64_t t; | |
1291 | int r; | |
1292 | ||
1293 | r = read_one_line_file(fn, &ln); | |
1294 | if (r < 0) | |
1295 | return r; | |
1296 | ||
1297 | r = safe_atou64(ln, &t); | |
1298 | if (r < 0) | |
1299 | return r; | |
1300 | ||
1301 | if (t <= 0 || t >= (uint64_t) USEC_INFINITY) | |
1302 | return -ERANGE; | |
1303 | ||
1304 | *ret = (usec_t) t; | |
1305 | return 0; | |
1306 | } | |
d390f8ef LP |
1307 | |
1308 | int fputs_with_space(FILE *f, const char *s, const char *separator, bool *space) { | |
1309 | int r; | |
1310 | ||
1311 | assert(s); | |
1312 | ||
1313 | /* Outputs the specified string with fputs(), but optionally prefixes it with a separator. The *space parameter | |
1314 | * when specified shall initially point to a boolean variable initialized to false. It is set to true after the | |
1315 | * first invocation. This call is supposed to be use in loops, where a separator shall be inserted between each | |
1316 | * element, but not before the first one. */ | |
1317 | ||
1318 | if (!f) | |
1319 | f = stdout; | |
1320 | ||
1321 | if (space) { | |
1322 | if (!separator) | |
1323 | separator = " "; | |
1324 | ||
1325 | if (*space) { | |
1326 | r = fputs(separator, f); | |
1327 | if (r < 0) | |
1328 | return r; | |
1329 | } | |
1330 | ||
1331 | *space = true; | |
1332 | } | |
1333 | ||
1334 | return fputs(s, f); | |
1335 | } | |
03532f0a LP |
1336 | |
1337 | int open_tmpfile_unlinkable(const char *directory, int flags) { | |
1338 | char *p; | |
992e8f22 | 1339 | int fd, r; |
03532f0a | 1340 | |
992e8f22 LP |
1341 | if (!directory) { |
1342 | r = tmp_dir(&directory); | |
1343 | if (r < 0) | |
1344 | return r; | |
1345 | } | |
03532f0a LP |
1346 | |
1347 | /* Returns an unlinked temporary file that cannot be linked into the file system anymore */ | |
1348 | ||
03532f0a LP |
1349 | /* Try O_TMPFILE first, if it is supported */ |
1350 | fd = open(directory, flags|O_TMPFILE|O_EXCL, S_IRUSR|S_IWUSR); | |
1351 | if (fd >= 0) | |
1352 | return fd; | |
03532f0a LP |
1353 | |
1354 | /* Fall back to unguessable name + unlinking */ | |
1355 | p = strjoina(directory, "/systemd-tmp-XXXXXX"); | |
1356 | ||
646853bd | 1357 | fd = mkostemp_safe(p); |
03532f0a LP |
1358 | if (fd < 0) |
1359 | return fd; | |
1360 | ||
1361 | (void) unlink(p); | |
1362 | ||
1363 | return fd; | |
1364 | } | |
1365 | ||
1366 | int open_tmpfile_linkable(const char *target, int flags, char **ret_path) { | |
1367 | _cleanup_free_ char *tmp = NULL; | |
1368 | int r, fd; | |
1369 | ||
1370 | assert(target); | |
1371 | assert(ret_path); | |
1372 | ||
1373 | /* Don't allow O_EXCL, as that has a special meaning for O_TMPFILE */ | |
1374 | assert((flags & O_EXCL) == 0); | |
1375 | ||
1376 | /* Creates a temporary file, that shall be renamed to "target" later. If possible, this uses O_TMPFILE – in | |
1377 | * which case "ret_path" will be returned as NULL. If not possible a the tempoary path name used is returned in | |
1378 | * "ret_path". Use link_tmpfile() below to rename the result after writing the file in full. */ | |
1379 | ||
03532f0a LP |
1380 | { |
1381 | _cleanup_free_ char *dn = NULL; | |
1382 | ||
1383 | dn = dirname_malloc(target); | |
1384 | if (!dn) | |
1385 | return -ENOMEM; | |
1386 | ||
1387 | fd = open(dn, O_TMPFILE|flags, 0640); | |
1388 | if (fd >= 0) { | |
1389 | *ret_path = NULL; | |
1390 | return fd; | |
1391 | } | |
1392 | ||
1393 | log_debug_errno(errno, "Failed to use O_TMPFILE on %s: %m", dn); | |
1394 | } | |
03532f0a LP |
1395 | |
1396 | r = tempfn_random(target, NULL, &tmp); | |
1397 | if (r < 0) | |
1398 | return r; | |
1399 | ||
1400 | fd = open(tmp, O_CREAT|O_EXCL|O_NOFOLLOW|O_NOCTTY|flags, 0640); | |
1401 | if (fd < 0) | |
1402 | return -errno; | |
1403 | ||
1404 | *ret_path = tmp; | |
1405 | tmp = NULL; | |
1406 | ||
1407 | return fd; | |
1408 | } | |
1409 | ||
504afd7c ZJS |
1410 | int open_serialization_fd(const char *ident) { |
1411 | int fd = -1; | |
1412 | ||
1413 | fd = memfd_create(ident, MFD_CLOEXEC); | |
1414 | if (fd < 0) { | |
1415 | const char *path; | |
1416 | ||
df0ff127 | 1417 | path = getpid_cached() == 1 ? "/run/systemd" : "/tmp"; |
504afd7c ZJS |
1418 | fd = open_tmpfile_unlinkable(path, O_RDWR|O_CLOEXEC); |
1419 | if (fd < 0) | |
1420 | return fd; | |
1421 | ||
1422 | log_debug("Serializing %s to %s.", ident, path); | |
1423 | } else | |
1424 | log_debug("Serializing %s to memfd.", ident); | |
1425 | ||
1426 | return fd; | |
1427 | } | |
1428 | ||
03532f0a LP |
1429 | int link_tmpfile(int fd, const char *path, const char *target) { |
1430 | ||
1431 | assert(fd >= 0); | |
1432 | assert(target); | |
1433 | ||
1434 | /* Moves a temporary file created with open_tmpfile() above into its final place. if "path" is NULL an fd | |
1435 | * created with O_TMPFILE is assumed, and linkat() is used. Otherwise it is assumed O_TMPFILE is not supported | |
1436 | * on the directory, and renameat2() is used instead. | |
1437 | * | |
f8e2f4d6 | 1438 | * Note that in both cases we will not replace existing files. This is because linkat() does not support this |
03532f0a LP |
1439 | * operation currently (renameat2() does), and there is no nice way to emulate this. */ |
1440 | ||
1441 | if (path) { | |
1442 | if (rename_noreplace(AT_FDCWD, path, AT_FDCWD, target) < 0) | |
1443 | return -errno; | |
1444 | } else { | |
1445 | char proc_fd_path[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(fd) + 1]; | |
1446 | ||
1447 | xsprintf(proc_fd_path, "/proc/self/fd/%i", fd); | |
1448 | ||
1449 | if (linkat(AT_FDCWD, proc_fd_path, AT_FDCWD, target, AT_SYMLINK_FOLLOW) < 0) | |
1450 | return -errno; | |
1451 | } | |
1452 | ||
1453 | return 0; | |
1454 | } | |
03c2b288 LP |
1455 | |
1456 | int read_nul_string(FILE *f, char **ret) { | |
1457 | _cleanup_free_ char *x = NULL; | |
1458 | size_t allocated = 0, n = 0; | |
1459 | ||
1460 | assert(f); | |
1461 | assert(ret); | |
1462 | ||
1463 | /* Reads a NUL-terminated string from the specified file. */ | |
1464 | ||
1465 | for (;;) { | |
1466 | int c; | |
1467 | ||
1468 | if (!GREEDY_REALLOC(x, allocated, n+2)) | |
1469 | return -ENOMEM; | |
1470 | ||
1471 | c = fgetc(f); | |
1472 | if (c == 0) /* Terminate at NUL byte */ | |
1473 | break; | |
1474 | if (c == EOF) { | |
1475 | if (ferror(f)) | |
1476 | return -errno; | |
1477 | break; /* Terminate at EOF */ | |
1478 | } | |
1479 | ||
1480 | x[n++] = (char) c; | |
1481 | } | |
1482 | ||
1483 | if (x) | |
1484 | x[n] = 0; | |
1485 | else { | |
1486 | x = new0(char, 1); | |
1487 | if (!x) | |
1488 | return -ENOMEM; | |
1489 | } | |
1490 | ||
1491 | *ret = x; | |
1492 | x = NULL; | |
1493 | ||
1494 | return 0; | |
1495 | } | |
676bcb0f LP |
1496 | |
1497 | int mkdtemp_malloc(const char *template, char **ret) { | |
1498 | char *p; | |
1499 | ||
1500 | assert(template); | |
1501 | assert(ret); | |
1502 | ||
1503 | p = strdup(template); | |
1504 | if (!p) | |
1505 | return -ENOMEM; | |
1506 | ||
1507 | if (!mkdtemp(p)) { | |
1508 | free(p); | |
1509 | return -errno; | |
1510 | } | |
1511 | ||
1512 | *ret = p; | |
1513 | return 0; | |
1514 | } | |
4f9a66a3 LP |
1515 | |
1516 | int read_line(FILE *f, size_t limit, char **ret) { | |
1517 | _cleanup_free_ char *buffer = NULL; | |
1518 | size_t n = 0, allocated = 0, count = 0; | |
1519 | int r; | |
1520 | ||
1521 | assert(f); | |
1522 | ||
1523 | /* Something like a bounded version of getline(). | |
1524 | * | |
1525 | * Considers EOF, \n and \0 end of line delimiters, and does not include these delimiters in the string | |
1526 | * returned. | |
1527 | * | |
1528 | * Returns the number of bytes read from the files (i.e. including delimiters — this hence usually differs from | |
1529 | * the number of characters in the returned string). When EOF is hit, 0 is returned. | |
1530 | * | |
1531 | * The input parameter limit is the maximum numbers of characters in the returned string, i.e. excluding | |
1532 | * delimiters. If the limit is hit we fail and return -ENOBUFS. | |
1533 | * | |
1534 | * If a line shall be skipped ret may be initialized as NULL. */ | |
1535 | ||
1536 | if (ret) { | |
1537 | if (!GREEDY_REALLOC(buffer, allocated, 1)) | |
1538 | return -ENOMEM; | |
1539 | } | |
1540 | ||
1541 | flockfile(f); | |
1542 | ||
1543 | for (;;) { | |
1544 | int c; | |
1545 | ||
1546 | if (n >= limit) { | |
1547 | funlockfile(f); | |
1548 | return -ENOBUFS; | |
1549 | } | |
1550 | ||
1551 | errno = 0; | |
1552 | c = fgetc_unlocked(f); | |
1553 | if (c == EOF) { | |
1554 | /* if we read an error, and have no data to return, then propagate the error */ | |
1555 | if (ferror_unlocked(f) && n == 0) { | |
1556 | r = errno > 0 ? -errno : -EIO; | |
1557 | funlockfile(f); | |
1558 | return r; | |
1559 | } | |
1560 | ||
1561 | break; | |
1562 | } | |
1563 | ||
1564 | count++; | |
1565 | ||
1566 | if (IN_SET(c, '\n', 0)) /* Reached a delimiter */ | |
1567 | break; | |
1568 | ||
1569 | if (ret) { | |
1570 | if (!GREEDY_REALLOC(buffer, allocated, n + 2)) { | |
1571 | funlockfile(f); | |
1572 | return -ENOMEM; | |
1573 | } | |
1574 | ||
1575 | buffer[n] = (char) c; | |
1576 | } | |
1577 | ||
1578 | n++; | |
1579 | } | |
1580 | ||
1581 | funlockfile(f); | |
1582 | ||
1583 | if (ret) { | |
1584 | buffer[n] = 0; | |
1585 | ||
1586 | *ret = buffer; | |
1587 | buffer = NULL; | |
1588 | } | |
1589 | ||
1590 | return (int) count; | |
1591 | } |