]>
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 LP |
32 | #include "ctype.h" |
33 | #include "escape.h" | |
3ffd4af2 LP |
34 | #include "fd-util.h" |
35 | #include "fileio.h" | |
f4f15635 | 36 | #include "fs-util.h" |
0d39fa9c | 37 | #include "hexdecoct.h" |
93cc7779 TA |
38 | #include "log.h" |
39 | #include "macro.h" | |
33d52ab9 | 40 | #include "parse-util.h" |
0d39fa9c LP |
41 | #include "path-util.h" |
42 | #include "random-util.h" | |
33d52ab9 | 43 | #include "stdio-util.h" |
07630cea | 44 | #include "string-util.h" |
a5c32cff | 45 | #include "strv.h" |
93cc7779 | 46 | #include "time-util.h" |
affb60b1 | 47 | #include "umask-util.h" |
335c46b5 | 48 | #include "utf8.h" |
a5c32cff | 49 | |
40beecdb | 50 | int write_string_stream(FILE *f, const char *line, bool enforce_newline) { |
dacd6cee | 51 | |
717603e3 LP |
52 | assert(f); |
53 | assert(line); | |
54 | ||
fec6fc6b | 55 | fputs(line, f); |
40beecdb | 56 | if (enforce_newline && !endswith(line, "\n")) |
a5c32cff HH |
57 | fputc('\n', f); |
58 | ||
dacd6cee | 59 | return fflush_and_check(f); |
a5c32cff HH |
60 | } |
61 | ||
4c1fc3e4 | 62 | static int write_string_file_atomic(const char *fn, const char *line, bool enforce_newline) { |
a5c32cff HH |
63 | _cleanup_fclose_ FILE *f = NULL; |
64 | _cleanup_free_ char *p = NULL; | |
65 | int r; | |
66 | ||
67 | assert(fn); | |
68 | assert(line); | |
69 | ||
70 | r = fopen_temporary(fn, &f, &p); | |
71 | if (r < 0) | |
72 | return r; | |
73 | ||
0d39fa9c | 74 | (void) fchmod_umask(fileno(f), 0644); |
a5c32cff | 75 | |
4c1fc3e4 | 76 | r = write_string_stream(f, line, enforce_newline); |
f2997962 | 77 | if (r >= 0) { |
a5c32cff HH |
78 | if (rename(p, fn) < 0) |
79 | r = -errno; | |
a5c32cff HH |
80 | } |
81 | ||
a5c32cff | 82 | if (r < 0) |
0d39fa9c | 83 | (void) unlink(p); |
a5c32cff HH |
84 | |
85 | return r; | |
86 | } | |
87 | ||
4c1fc3e4 DM |
88 | int write_string_file(const char *fn, const char *line, WriteStringFileFlags flags) { |
89 | _cleanup_fclose_ FILE *f = NULL; | |
eb3da901 | 90 | int q, r; |
4c1fc3e4 DM |
91 | |
92 | assert(fn); | |
93 | assert(line); | |
94 | ||
95 | if (flags & WRITE_STRING_FILE_ATOMIC) { | |
96 | assert(flags & WRITE_STRING_FILE_CREATE); | |
97 | ||
eb3da901 LP |
98 | r = write_string_file_atomic(fn, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE)); |
99 | if (r < 0) | |
100 | goto fail; | |
101 | ||
102 | return r; | |
4c1fc3e4 DM |
103 | } |
104 | ||
105 | if (flags & WRITE_STRING_FILE_CREATE) { | |
106 | f = fopen(fn, "we"); | |
eb3da901 LP |
107 | if (!f) { |
108 | r = -errno; | |
109 | goto fail; | |
110 | } | |
4c1fc3e4 DM |
111 | } else { |
112 | int fd; | |
113 | ||
114 | /* We manually build our own version of fopen(..., "we") that | |
115 | * works without O_CREAT */ | |
116 | fd = open(fn, O_WRONLY|O_CLOEXEC|O_NOCTTY); | |
eb3da901 LP |
117 | if (fd < 0) { |
118 | r = -errno; | |
119 | goto fail; | |
120 | } | |
4c1fc3e4 DM |
121 | |
122 | f = fdopen(fd, "we"); | |
123 | if (!f) { | |
eb3da901 | 124 | r = -errno; |
4c1fc3e4 | 125 | safe_close(fd); |
eb3da901 | 126 | goto fail; |
4c1fc3e4 DM |
127 | } |
128 | } | |
129 | ||
eb3da901 LP |
130 | r = write_string_stream(f, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE)); |
131 | if (r < 0) | |
132 | goto fail; | |
133 | ||
134 | return 0; | |
135 | ||
136 | fail: | |
137 | if (!(flags & WRITE_STRING_FILE_VERIFY_ON_FAILURE)) | |
138 | return r; | |
139 | ||
140 | f = safe_fclose(f); | |
141 | ||
142 | /* OK, the operation failed, but let's see if the right | |
143 | * contents in place already. If so, eat up the error. */ | |
144 | ||
145 | q = verify_file(fn, line, !(flags & WRITE_STRING_FILE_AVOID_NEWLINE)); | |
146 | if (q <= 0) | |
147 | return r; | |
148 | ||
149 | return 0; | |
4c1fc3e4 DM |
150 | } |
151 | ||
a5c32cff HH |
152 | int read_one_line_file(const char *fn, char **line) { |
153 | _cleanup_fclose_ FILE *f = NULL; | |
154 | char t[LINE_MAX], *c; | |
155 | ||
156 | assert(fn); | |
157 | assert(line); | |
158 | ||
159 | f = fopen(fn, "re"); | |
160 | if (!f) | |
161 | return -errno; | |
162 | ||
163 | if (!fgets(t, sizeof(t), f)) { | |
164 | ||
165 | if (ferror(f)) | |
f5e5c28f | 166 | return errno > 0 ? -errno : -EIO; |
a5c32cff HH |
167 | |
168 | t[0] = 0; | |
169 | } | |
170 | ||
171 | c = strdup(t); | |
172 | if (!c) | |
173 | return -ENOMEM; | |
174 | truncate_nl(c); | |
175 | ||
176 | *line = c; | |
177 | return 0; | |
178 | } | |
179 | ||
eb3da901 LP |
180 | int verify_file(const char *fn, const char *blob, bool accept_extra_nl) { |
181 | _cleanup_fclose_ FILE *f = NULL; | |
182 | _cleanup_free_ char *buf = NULL; | |
183 | size_t l, k; | |
15dee3f0 | 184 | |
eb3da901 LP |
185 | assert(fn); |
186 | assert(blob); | |
187 | ||
188 | l = strlen(blob); | |
189 | ||
190 | if (accept_extra_nl && endswith(blob, "\n")) | |
191 | accept_extra_nl = false; | |
192 | ||
193 | buf = malloc(l + accept_extra_nl + 1); | |
194 | if (!buf) | |
195 | return -ENOMEM; | |
196 | ||
197 | f = fopen(fn, "re"); | |
198 | if (!f) | |
199 | return -errno; | |
200 | ||
201 | /* We try to read one byte more than we need, so that we know whether we hit eof */ | |
202 | errno = 0; | |
203 | k = fread(buf, 1, l + accept_extra_nl + 1, f); | |
204 | if (ferror(f)) | |
205 | return errno > 0 ? -errno : -EIO; | |
206 | ||
207 | if (k != l && k != l + accept_extra_nl) | |
208 | return 0; | |
209 | if (memcmp(buf, blob, l) != 0) | |
210 | return 0; | |
211 | if (k > l && buf[l] != '\n') | |
212 | return 0; | |
15dee3f0 | 213 | |
eb3da901 | 214 | return 1; |
15dee3f0 LP |
215 | } |
216 | ||
717603e3 | 217 | int read_full_stream(FILE *f, char **contents, size_t *size) { |
a5c32cff HH |
218 | size_t n, l; |
219 | _cleanup_free_ char *buf = NULL; | |
220 | struct stat st; | |
221 | ||
717603e3 | 222 | assert(f); |
a5c32cff HH |
223 | assert(contents); |
224 | ||
a5c32cff HH |
225 | if (fstat(fileno(f), &st) < 0) |
226 | return -errno; | |
227 | ||
717603e3 | 228 | n = LINE_MAX; |
a5c32cff | 229 | |
717603e3 LP |
230 | if (S_ISREG(st.st_mode)) { |
231 | ||
232 | /* Safety check */ | |
233 | if (st.st_size > 4*1024*1024) | |
234 | return -E2BIG; | |
235 | ||
236 | /* Start with the right file size, but be prepared for | |
237 | * files from /proc which generally report a file size | |
238 | * of 0 */ | |
239 | if (st.st_size > 0) | |
240 | n = st.st_size; | |
241 | } | |
a5c32cff | 242 | |
717603e3 | 243 | l = 0; |
a5c32cff HH |
244 | for (;;) { |
245 | char *t; | |
246 | size_t k; | |
247 | ||
248 | t = realloc(buf, n+1); | |
249 | if (!t) | |
250 | return -ENOMEM; | |
251 | ||
252 | buf = t; | |
253 | k = fread(buf + l, 1, n - l, f); | |
254 | ||
255 | if (k <= 0) { | |
256 | if (ferror(f)) | |
257 | return -errno; | |
258 | ||
259 | break; | |
260 | } | |
261 | ||
262 | l += k; | |
263 | n *= 2; | |
264 | ||
265 | /* Safety check */ | |
266 | if (n > 4*1024*1024) | |
267 | return -E2BIG; | |
268 | } | |
269 | ||
270 | buf[l] = 0; | |
271 | *contents = buf; | |
d78a28e3 | 272 | buf = NULL; /* do not free */ |
a5c32cff HH |
273 | |
274 | if (size) | |
275 | *size = l; | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
717603e3 LP |
280 | int read_full_file(const char *fn, char **contents, size_t *size) { |
281 | _cleanup_fclose_ FILE *f = NULL; | |
282 | ||
283 | assert(fn); | |
284 | assert(contents); | |
285 | ||
286 | f = fopen(fn, "re"); | |
287 | if (!f) | |
288 | return -errno; | |
289 | ||
290 | return read_full_stream(f, contents, size); | |
291 | } | |
292 | ||
f73141d7 | 293 | static int parse_env_file_internal( |
717603e3 | 294 | FILE *f, |
a5c32cff | 295 | const char *fname, |
f73141d7 | 296 | const char *newline, |
335c46b5 | 297 | int (*push) (const char *filename, unsigned line, |
a5f6c30d MS |
298 | const char *key, char *value, void *userdata, int *n_pushed), |
299 | void *userdata, | |
300 | int *n_pushed) { | |
f73141d7 LP |
301 | |
302 | _cleanup_free_ char *contents = NULL, *key = NULL; | |
2b77f67e | 303 | 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 |
304 | char *p, *value = NULL; |
305 | int r; | |
335c46b5 | 306 | unsigned line = 1; |
a5c32cff | 307 | |
f73141d7 LP |
308 | enum { |
309 | PRE_KEY, | |
310 | KEY, | |
f73141d7 LP |
311 | PRE_VALUE, |
312 | VALUE, | |
313 | VALUE_ESCAPE, | |
314 | SINGLE_QUOTE_VALUE, | |
315 | SINGLE_QUOTE_VALUE_ESCAPE, | |
316 | DOUBLE_QUOTE_VALUE, | |
317 | DOUBLE_QUOTE_VALUE_ESCAPE, | |
318 | COMMENT, | |
319 | COMMENT_ESCAPE | |
320 | } state = PRE_KEY; | |
a5c32cff | 321 | |
f73141d7 | 322 | assert(newline); |
a5c32cff | 323 | |
717603e3 LP |
324 | if (f) |
325 | r = read_full_stream(f, &contents, NULL); | |
326 | else | |
327 | r = read_full_file(fname, &contents, NULL); | |
1c17cbed | 328 | if (r < 0) |
a5c32cff HH |
329 | return r; |
330 | ||
f73141d7 LP |
331 | for (p = contents; *p; p++) { |
332 | char c = *p; | |
333 | ||
334 | switch (state) { | |
335 | ||
336 | case PRE_KEY: | |
ebc05a09 | 337 | if (strchr(COMMENTS, c)) |
f73141d7 LP |
338 | state = COMMENT; |
339 | else if (!strchr(WHITESPACE, c)) { | |
340 | state = KEY; | |
2b77f67e LP |
341 | last_key_whitespace = (size_t) -1; |
342 | ||
ca2d3784 | 343 | if (!GREEDY_REALLOC(key, key_alloc, n_key+2)) { |
f73141d7 LP |
344 | r = -ENOMEM; |
345 | goto fail; | |
346 | } | |
347 | ||
348 | key[n_key++] = c; | |
349 | } | |
350 | break; | |
351 | ||
352 | case KEY: | |
353 | if (strchr(newline, c)) { | |
354 | state = PRE_KEY; | |
313cefa1 | 355 | line++; |
f73141d7 | 356 | n_key = 0; |
2b77f67e | 357 | } else if (c == '=') { |
f73141d7 | 358 | state = PRE_VALUE; |
2b77f67e LP |
359 | last_value_whitespace = (size_t) -1; |
360 | } else { | |
361 | if (!strchr(WHITESPACE, c)) | |
362 | last_key_whitespace = (size_t) -1; | |
363 | else if (last_key_whitespace == (size_t) -1) | |
364 | last_key_whitespace = n_key; | |
365 | ||
ca2d3784 | 366 | if (!GREEDY_REALLOC(key, key_alloc, n_key+2)) { |
f73141d7 LP |
367 | r = -ENOMEM; |
368 | goto fail; | |
369 | } | |
370 | ||
371 | key[n_key++] = c; | |
372 | } | |
a5c32cff | 373 | |
f73141d7 LP |
374 | break; |
375 | ||
f73141d7 | 376 | case PRE_VALUE: |
98f59e59 | 377 | if (strchr(newline, c)) { |
f73141d7 | 378 | state = PRE_KEY; |
313cefa1 | 379 | line++; |
f73141d7 | 380 | key[n_key] = 0; |
a5c32cff | 381 | |
f73141d7 LP |
382 | if (value) |
383 | value[n_value] = 0; | |
a5c32cff | 384 | |
ebc05a09 | 385 | /* strip trailing whitespace from key */ |
2b77f67e LP |
386 | if (last_key_whitespace != (size_t) -1) |
387 | key[last_key_whitespace] = 0; | |
ebc05a09 | 388 | |
a5f6c30d | 389 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 LP |
390 | if (r < 0) |
391 | goto fail; | |
392 | ||
393 | n_key = 0; | |
394 | value = NULL; | |
395 | value_alloc = n_value = 0; | |
2b77f67e | 396 | |
f73141d7 LP |
397 | } else if (c == '\'') |
398 | state = SINGLE_QUOTE_VALUE; | |
399 | else if (c == '\"') | |
400 | state = DOUBLE_QUOTE_VALUE; | |
401 | else if (c == '\\') | |
402 | state = VALUE_ESCAPE; | |
403 | else if (!strchr(WHITESPACE, c)) { | |
404 | state = VALUE; | |
405 | ||
ca2d3784 | 406 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
407 | r = -ENOMEM; |
408 | goto fail; | |
409 | } | |
410 | ||
411 | value[n_value++] = c; | |
412 | } | |
413 | ||
414 | break; | |
415 | ||
416 | case VALUE: | |
417 | if (strchr(newline, c)) { | |
418 | state = PRE_KEY; | |
313cefa1 | 419 | line++; |
98f59e59 | 420 | |
f73141d7 LP |
421 | key[n_key] = 0; |
422 | ||
423 | if (value) | |
424 | value[n_value] = 0; | |
425 | ||
2b77f67e LP |
426 | /* Chomp off trailing whitespace from value */ |
427 | if (last_value_whitespace != (size_t) -1) | |
428 | value[last_value_whitespace] = 0; | |
f73141d7 | 429 | |
ebc05a09 | 430 | /* strip trailing whitespace from key */ |
2b77f67e LP |
431 | if (last_key_whitespace != (size_t) -1) |
432 | key[last_key_whitespace] = 0; | |
ebc05a09 | 433 | |
a5f6c30d | 434 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 LP |
435 | if (r < 0) |
436 | goto fail; | |
437 | ||
438 | n_key = 0; | |
439 | value = NULL; | |
440 | value_alloc = n_value = 0; | |
2b77f67e | 441 | |
f73141d7 LP |
442 | } else if (c == '\\') { |
443 | state = VALUE_ESCAPE; | |
2b77f67e | 444 | last_value_whitespace = (size_t) -1; |
f73141d7 LP |
445 | } else { |
446 | if (!strchr(WHITESPACE, c)) | |
2b77f67e LP |
447 | last_value_whitespace = (size_t) -1; |
448 | else if (last_value_whitespace == (size_t) -1) | |
449 | last_value_whitespace = n_value; | |
f73141d7 | 450 | |
ca2d3784 | 451 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
452 | r = -ENOMEM; |
453 | goto fail; | |
454 | } | |
455 | ||
456 | value[n_value++] = c; | |
457 | } | |
458 | ||
459 | break; | |
460 | ||
461 | case VALUE_ESCAPE: | |
462 | state = VALUE; | |
463 | ||
464 | if (!strchr(newline, c)) { | |
465 | /* Escaped newlines we eat up entirely */ | |
ca2d3784 | 466 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
467 | r = -ENOMEM; |
468 | goto fail; | |
469 | } | |
470 | ||
471 | value[n_value++] = c; | |
472 | } | |
473 | break; | |
474 | ||
475 | case SINGLE_QUOTE_VALUE: | |
476 | if (c == '\'') | |
477 | state = PRE_VALUE; | |
478 | else if (c == '\\') | |
479 | state = SINGLE_QUOTE_VALUE_ESCAPE; | |
480 | else { | |
ca2d3784 | 481 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
482 | r = -ENOMEM; |
483 | goto fail; | |
484 | } | |
a5c32cff | 485 | |
f73141d7 LP |
486 | value[n_value++] = c; |
487 | } | |
a5c32cff | 488 | |
f73141d7 | 489 | break; |
a5c32cff | 490 | |
f73141d7 LP |
491 | case SINGLE_QUOTE_VALUE_ESCAPE: |
492 | state = SINGLE_QUOTE_VALUE; | |
a5c32cff | 493 | |
f73141d7 | 494 | if (!strchr(newline, c)) { |
ca2d3784 | 495 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
a5c32cff | 496 | r = -ENOMEM; |
a5c32cff HH |
497 | goto fail; |
498 | } | |
499 | ||
f73141d7 LP |
500 | value[n_value++] = c; |
501 | } | |
502 | break; | |
503 | ||
504 | case DOUBLE_QUOTE_VALUE: | |
505 | if (c == '\"') | |
506 | state = PRE_VALUE; | |
507 | else if (c == '\\') | |
508 | state = DOUBLE_QUOTE_VALUE_ESCAPE; | |
509 | else { | |
ca2d3784 | 510 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
511 | r = -ENOMEM; |
512 | goto fail; | |
a5c32cff HH |
513 | } |
514 | ||
f73141d7 LP |
515 | value[n_value++] = c; |
516 | } | |
517 | ||
518 | break; | |
519 | ||
520 | case DOUBLE_QUOTE_VALUE_ESCAPE: | |
521 | state = DOUBLE_QUOTE_VALUE; | |
a5c32cff | 522 | |
f73141d7 | 523 | if (!strchr(newline, c)) { |
ca2d3784 | 524 | if (!GREEDY_REALLOC(value, value_alloc, n_value+2)) { |
f73141d7 LP |
525 | r = -ENOMEM; |
526 | goto fail; | |
527 | } | |
a5c32cff | 528 | |
f73141d7 | 529 | value[n_value++] = c; |
a5c32cff | 530 | } |
f73141d7 LP |
531 | break; |
532 | ||
533 | case COMMENT: | |
534 | if (c == '\\') | |
535 | state = COMMENT_ESCAPE; | |
335c46b5 | 536 | else if (strchr(newline, c)) { |
f73141d7 | 537 | state = PRE_KEY; |
313cefa1 | 538 | line++; |
335c46b5 | 539 | } |
f73141d7 LP |
540 | break; |
541 | ||
542 | case COMMENT_ESCAPE: | |
543 | state = COMMENT; | |
544 | break; | |
a5c32cff | 545 | } |
f73141d7 LP |
546 | } |
547 | ||
548 | if (state == PRE_VALUE || | |
549 | state == VALUE || | |
550 | state == VALUE_ESCAPE || | |
551 | state == SINGLE_QUOTE_VALUE || | |
552 | state == SINGLE_QUOTE_VALUE_ESCAPE || | |
553 | state == DOUBLE_QUOTE_VALUE || | |
554 | state == DOUBLE_QUOTE_VALUE_ESCAPE) { | |
a5c32cff | 555 | |
f73141d7 LP |
556 | key[n_key] = 0; |
557 | ||
558 | if (value) | |
559 | value[n_value] = 0; | |
560 | ||
2b77f67e LP |
561 | if (state == VALUE) |
562 | if (last_value_whitespace != (size_t) -1) | |
563 | value[last_value_whitespace] = 0; | |
564 | ||
ebc05a09 | 565 | /* strip trailing whitespace from key */ |
2b77f67e LP |
566 | if (last_key_whitespace != (size_t) -1) |
567 | key[last_key_whitespace] = 0; | |
ebc05a09 | 568 | |
a5f6c30d | 569 | r = push(fname, line, key, value, userdata, n_pushed); |
f73141d7 LP |
570 | if (r < 0) |
571 | goto fail; | |
a5c32cff HH |
572 | } |
573 | ||
f73141d7 LP |
574 | return 0; |
575 | ||
a5c32cff | 576 | fail: |
f73141d7 | 577 | free(value); |
a5c32cff HH |
578 | return r; |
579 | } | |
580 | ||
717603e3 LP |
581 | static int parse_env_file_push( |
582 | const char *filename, unsigned line, | |
583 | const char *key, char *value, | |
a5f6c30d MS |
584 | void *userdata, |
585 | int *n_pushed) { | |
335c46b5 | 586 | |
f27f0e21 GB |
587 | const char *k; |
588 | va_list aq, *ap = userdata; | |
589 | ||
590 | if (!utf8_is_valid(key)) { | |
3587161a | 591 | _cleanup_free_ char *p = NULL; |
550a40ec | 592 | |
717603e3 LP |
593 | p = utf8_escape_invalid(key); |
594 | log_error("%s:%u: invalid UTF-8 in key '%s', ignoring.", strna(filename), line, p); | |
f27f0e21 GB |
595 | return -EINVAL; |
596 | } | |
597 | ||
598 | if (value && !utf8_is_valid(value)) { | |
3587161a | 599 | _cleanup_free_ char *p = NULL; |
550a40ec | 600 | |
717603e3 LP |
601 | p = utf8_escape_invalid(value); |
602 | log_error("%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.", strna(filename), line, key, p); | |
f27f0e21 GB |
603 | return -EINVAL; |
604 | } | |
a5c32cff | 605 | |
f27f0e21 | 606 | va_copy(aq, *ap); |
a5c32cff | 607 | |
f27f0e21 GB |
608 | while ((k = va_arg(aq, const char *))) { |
609 | char **v; | |
a5c32cff | 610 | |
f27f0e21 | 611 | v = va_arg(aq, char **); |
a5c32cff | 612 | |
f27f0e21 GB |
613 | if (streq(key, k)) { |
614 | va_end(aq); | |
615 | free(*v); | |
616 | *v = value; | |
a5f6c30d MS |
617 | |
618 | if (n_pushed) | |
619 | (*n_pushed)++; | |
620 | ||
f27f0e21 | 621 | return 1; |
f73141d7 | 622 | } |
335c46b5 | 623 | } |
a5c32cff | 624 | |
f27f0e21 | 625 | va_end(aq); |
f73141d7 | 626 | free(value); |
717603e3 | 627 | |
f73141d7 LP |
628 | return 0; |
629 | } | |
a5c32cff | 630 | |
f73141d7 LP |
631 | int parse_env_file( |
632 | const char *fname, | |
633 | const char *newline, ...) { | |
a5c32cff | 634 | |
f73141d7 | 635 | va_list ap; |
a5f6c30d | 636 | int r, n_pushed = 0; |
a5c32cff | 637 | |
f73141d7 LP |
638 | if (!newline) |
639 | newline = NEWLINE; | |
a5c32cff | 640 | |
f73141d7 | 641 | va_start(ap, newline); |
a5f6c30d | 642 | r = parse_env_file_internal(NULL, fname, newline, parse_env_file_push, &ap, &n_pushed); |
f73141d7 | 643 | va_end(ap); |
a5c32cff | 644 | |
a5f6c30d | 645 | return r < 0 ? r : n_pushed; |
f73141d7 | 646 | } |
a5c32cff | 647 | |
717603e3 LP |
648 | static int load_env_file_push( |
649 | const char *filename, unsigned line, | |
650 | const char *key, char *value, | |
a5f6c30d MS |
651 | void *userdata, |
652 | int *n_pushed) { | |
f27f0e21 GB |
653 | char ***m = userdata; |
654 | char *p; | |
655 | int r; | |
a5c32cff | 656 | |
f27f0e21 | 657 | if (!utf8_is_valid(key)) { |
b5d74213 ZJS |
658 | _cleanup_free_ char *t = utf8_escape_invalid(key); |
659 | ||
717603e3 | 660 | log_error("%s:%u: invalid UTF-8 for key '%s', ignoring.", strna(filename), line, t); |
f27f0e21 GB |
661 | return -EINVAL; |
662 | } | |
663 | ||
664 | if (value && !utf8_is_valid(value)) { | |
b5d74213 ZJS |
665 | _cleanup_free_ char *t = utf8_escape_invalid(value); |
666 | ||
717603e3 | 667 | log_error("%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.", strna(filename), line, key, t); |
f27f0e21 GB |
668 | return -EINVAL; |
669 | } | |
a5c32cff | 670 | |
f27f0e21 GB |
671 | p = strjoin(key, "=", strempty(value), NULL); |
672 | if (!p) | |
673 | return -ENOMEM; | |
335c46b5 | 674 | |
6e18964d ZJS |
675 | r = strv_consume(m, p); |
676 | if (r < 0) | |
f27f0e21 | 677 | return r; |
a5c32cff | 678 | |
a5f6c30d MS |
679 | if (n_pushed) |
680 | (*n_pushed)++; | |
681 | ||
f73141d7 LP |
682 | free(value); |
683 | return 0; | |
684 | } | |
685 | ||
717603e3 LP |
686 | int load_env_file(FILE *f, const char *fname, const char *newline, char ***rl) { |
687 | char **m = NULL; | |
688 | int r; | |
689 | ||
690 | if (!newline) | |
691 | newline = NEWLINE; | |
692 | ||
a5f6c30d | 693 | r = parse_env_file_internal(f, fname, newline, load_env_file_push, &m, NULL); |
717603e3 LP |
694 | if (r < 0) { |
695 | strv_free(m); | |
696 | return r; | |
697 | } | |
698 | ||
699 | *rl = m; | |
700 | return 0; | |
701 | } | |
702 | ||
703 | static int load_env_file_push_pairs( | |
704 | const char *filename, unsigned line, | |
705 | const char *key, char *value, | |
a5f6c30d MS |
706 | void *userdata, |
707 | int *n_pushed) { | |
717603e3 LP |
708 | char ***m = userdata; |
709 | int r; | |
710 | ||
711 | if (!utf8_is_valid(key)) { | |
712 | _cleanup_free_ char *t = utf8_escape_invalid(key); | |
713 | ||
714 | log_error("%s:%u: invalid UTF-8 for key '%s', ignoring.", strna(filename), line, t); | |
715 | return -EINVAL; | |
716 | } | |
717 | ||
718 | if (value && !utf8_is_valid(value)) { | |
719 | _cleanup_free_ char *t = utf8_escape_invalid(value); | |
720 | ||
721 | log_error("%s:%u: invalid UTF-8 value for key %s: '%s', ignoring.", strna(filename), line, key, t); | |
722 | return -EINVAL; | |
723 | } | |
724 | ||
725 | r = strv_extend(m, key); | |
726 | if (r < 0) | |
727 | return -ENOMEM; | |
728 | ||
729 | if (!value) { | |
730 | r = strv_extend(m, ""); | |
731 | if (r < 0) | |
732 | return -ENOMEM; | |
733 | } else { | |
734 | r = strv_push(m, value); | |
735 | if (r < 0) | |
736 | return r; | |
737 | } | |
738 | ||
a5f6c30d MS |
739 | if (n_pushed) |
740 | (*n_pushed)++; | |
741 | ||
717603e3 LP |
742 | return 0; |
743 | } | |
744 | ||
745 | int load_env_file_pairs(FILE *f, const char *fname, const char *newline, char ***rl) { | |
f73141d7 LP |
746 | char **m = NULL; |
747 | int r; | |
a5c32cff | 748 | |
f73141d7 LP |
749 | if (!newline) |
750 | newline = NEWLINE; | |
751 | ||
a5f6c30d | 752 | r = parse_env_file_internal(f, fname, newline, load_env_file_push_pairs, &m, NULL); |
f73141d7 LP |
753 | if (r < 0) { |
754 | strv_free(m); | |
755 | return r; | |
a5c32cff HH |
756 | } |
757 | ||
758 | *rl = m; | |
a5c32cff HH |
759 | return 0; |
760 | } | |
761 | ||
768100ef LP |
762 | static void write_env_var(FILE *f, const char *v) { |
763 | const char *p; | |
764 | ||
765 | p = strchr(v, '='); | |
766 | if (!p) { | |
767 | /* Fallback */ | |
768 | fputs(v, f); | |
769 | fputc('\n', f); | |
770 | return; | |
771 | } | |
772 | ||
773 | p++; | |
774 | fwrite(v, 1, p-v, f); | |
775 | ||
0ce5a806 | 776 | if (string_has_cc(p, NULL) || chars_intersect(p, WHITESPACE SHELL_NEED_QUOTES)) { |
768100ef LP |
777 | fputc('\"', f); |
778 | ||
779 | for (; *p; p++) { | |
0ce5a806 | 780 | if (strchr(SHELL_NEED_ESCAPE, *p)) |
768100ef LP |
781 | fputc('\\', f); |
782 | ||
783 | fputc(*p, f); | |
784 | } | |
785 | ||
786 | fputc('\"', f); | |
787 | } else | |
788 | fputs(p, f); | |
789 | ||
790 | fputc('\n', f); | |
791 | } | |
792 | ||
a5c32cff | 793 | int write_env_file(const char *fname, char **l) { |
7fd1b19b | 794 | _cleanup_fclose_ FILE *f = NULL; |
736937e5 LP |
795 | _cleanup_free_ char *p = NULL; |
796 | char **i; | |
a5c32cff HH |
797 | int r; |
798 | ||
736937e5 LP |
799 | assert(fname); |
800 | ||
a5c32cff HH |
801 | r = fopen_temporary(fname, &f, &p); |
802 | if (r < 0) | |
803 | return r; | |
804 | ||
805 | fchmod_umask(fileno(f), 0644); | |
806 | ||
768100ef LP |
807 | STRV_FOREACH(i, l) |
808 | write_env_var(f, *i); | |
a5c32cff | 809 | |
736937e5 LP |
810 | r = fflush_and_check(f); |
811 | if (r >= 0) { | |
812 | if (rename(p, fname) >= 0) | |
813 | return 0; | |
a5c32cff | 814 | |
736937e5 | 815 | r = -errno; |
a5c32cff HH |
816 | } |
817 | ||
736937e5 | 818 | unlink(p); |
a5c32cff HH |
819 | return r; |
820 | } | |
68fee104 ZJS |
821 | |
822 | int executable_is_script(const char *path, char **interpreter) { | |
823 | int r; | |
c8b32e11 | 824 | _cleanup_free_ char *line = NULL; |
68fee104 ZJS |
825 | int len; |
826 | char *ans; | |
827 | ||
828 | assert(path); | |
829 | ||
830 | r = read_one_line_file(path, &line); | |
831 | if (r < 0) | |
832 | return r; | |
833 | ||
834 | if (!startswith(line, "#!")) | |
835 | return 0; | |
836 | ||
837 | ans = strstrip(line + 2); | |
838 | len = strcspn(ans, " \t"); | |
839 | ||
840 | if (len == 0) | |
841 | return 0; | |
842 | ||
843 | ans = strndup(ans, len); | |
844 | if (!ans) | |
845 | return -ENOMEM; | |
846 | ||
847 | *interpreter = ans; | |
848 | return 1; | |
849 | } | |
69ab8088 ZJS |
850 | |
851 | /** | |
0a7b53bd | 852 | * Retrieve one field from a file like /proc/self/status. pattern |
c4cd1d4d AK |
853 | * should not include whitespace or the delimiter (':'). pattern matches only |
854 | * the beginning of a line. Whitespace before ':' is skipped. Whitespace and | |
855 | * zeros after the ':' will be skipped. field must be freed afterwards. | |
856 | * terminator specifies the terminating characters of the field value (not | |
857 | * included in the value). | |
69ab8088 | 858 | */ |
c4cd1d4d | 859 | int get_proc_field(const char *filename, const char *pattern, const char *terminator, char **field) { |
69ab8088 | 860 | _cleanup_free_ char *status = NULL; |
90110825 | 861 | char *t, *f; |
69ab8088 ZJS |
862 | size_t len; |
863 | int r; | |
864 | ||
c4cd1d4d | 865 | assert(terminator); |
69ab8088 | 866 | assert(filename); |
7ff7394d | 867 | assert(pattern); |
69ab8088 ZJS |
868 | assert(field); |
869 | ||
870 | r = read_full_file(filename, &status, NULL); | |
871 | if (r < 0) | |
872 | return r; | |
873 | ||
c4cd1d4d AK |
874 | t = status; |
875 | ||
876 | do { | |
877 | bool pattern_ok; | |
878 | ||
879 | do { | |
880 | t = strstr(t, pattern); | |
881 | if (!t) | |
882 | return -ENOENT; | |
883 | ||
884 | /* Check that pattern occurs in beginning of line. */ | |
885 | pattern_ok = (t == status || t[-1] == '\n'); | |
886 | ||
887 | t += strlen(pattern); | |
888 | ||
889 | } while (!pattern_ok); | |
890 | ||
891 | t += strspn(t, " \t"); | |
892 | if (!*t) | |
893 | return -ENOENT; | |
894 | ||
895 | } while (*t != ':'); | |
896 | ||
897 | t++; | |
69ab8088 | 898 | |
4ec29144 | 899 | if (*t) { |
1e5413f7 ZJS |
900 | t += strspn(t, " \t"); |
901 | ||
902 | /* Also skip zeros, because when this is used for | |
903 | * capabilities, we don't want the zeros. This way the | |
904 | * same capability set always maps to the same string, | |
905 | * irrespective of the total capability set size. For | |
906 | * other numbers it shouldn't matter. */ | |
907 | t += strspn(t, "0"); | |
4ec29144 ZJS |
908 | /* Back off one char if there's nothing but whitespace |
909 | and zeros */ | |
1e5413f7 | 910 | if (!*t || isspace(*t)) |
313cefa1 | 911 | t--; |
4ec29144 | 912 | } |
69ab8088 | 913 | |
c4cd1d4d | 914 | len = strcspn(t, terminator); |
69ab8088 | 915 | |
90110825 LP |
916 | f = strndup(t, len); |
917 | if (!f) | |
69ab8088 ZJS |
918 | return -ENOMEM; |
919 | ||
90110825 | 920 | *field = f; |
69ab8088 ZJS |
921 | return 0; |
922 | } | |
0d39fa9c LP |
923 | |
924 | DIR *xopendirat(int fd, const char *name, int flags) { | |
925 | int nfd; | |
926 | DIR *d; | |
927 | ||
928 | assert(!(flags & O_CREAT)); | |
929 | ||
930 | nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0); | |
931 | if (nfd < 0) | |
932 | return NULL; | |
933 | ||
934 | d = fdopendir(nfd); | |
935 | if (!d) { | |
936 | safe_close(nfd); | |
937 | return NULL; | |
938 | } | |
939 | ||
940 | return d; | |
941 | } | |
942 | ||
943 | static int search_and_fopen_internal(const char *path, const char *mode, const char *root, char **search, FILE **_f) { | |
944 | char **i; | |
945 | ||
946 | assert(path); | |
947 | assert(mode); | |
948 | assert(_f); | |
949 | ||
950 | if (!path_strv_resolve_uniq(search, root)) | |
951 | return -ENOMEM; | |
952 | ||
953 | STRV_FOREACH(i, search) { | |
954 | _cleanup_free_ char *p = NULL; | |
955 | FILE *f; | |
956 | ||
957 | if (root) | |
958 | p = strjoin(root, *i, "/", path, NULL); | |
959 | else | |
960 | p = strjoin(*i, "/", path, NULL); | |
961 | if (!p) | |
962 | return -ENOMEM; | |
963 | ||
964 | f = fopen(p, mode); | |
965 | if (f) { | |
966 | *_f = f; | |
967 | return 0; | |
968 | } | |
969 | ||
970 | if (errno != ENOENT) | |
971 | return -errno; | |
972 | } | |
973 | ||
974 | return -ENOENT; | |
975 | } | |
976 | ||
977 | int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f) { | |
978 | _cleanup_strv_free_ char **copy = NULL; | |
979 | ||
980 | assert(path); | |
981 | assert(mode); | |
982 | assert(_f); | |
983 | ||
984 | if (path_is_absolute(path)) { | |
985 | FILE *f; | |
986 | ||
987 | f = fopen(path, mode); | |
988 | if (f) { | |
989 | *_f = f; | |
990 | return 0; | |
991 | } | |
992 | ||
993 | return -errno; | |
994 | } | |
995 | ||
996 | copy = strv_copy((char**) search); | |
997 | if (!copy) | |
998 | return -ENOMEM; | |
999 | ||
1000 | return search_and_fopen_internal(path, mode, root, copy, _f); | |
1001 | } | |
1002 | ||
1003 | int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f) { | |
1004 | _cleanup_strv_free_ char **s = NULL; | |
1005 | ||
1006 | if (path_is_absolute(path)) { | |
1007 | FILE *f; | |
1008 | ||
1009 | f = fopen(path, mode); | |
1010 | if (f) { | |
1011 | *_f = f; | |
1012 | return 0; | |
1013 | } | |
1014 | ||
1015 | return -errno; | |
1016 | } | |
1017 | ||
1018 | s = strv_split_nulstr(search); | |
1019 | if (!s) | |
1020 | return -ENOMEM; | |
1021 | ||
1022 | return search_and_fopen_internal(path, mode, root, s, _f); | |
1023 | } | |
1024 | ||
1025 | int fopen_temporary(const char *path, FILE **_f, char **_temp_path) { | |
1026 | FILE *f; | |
1027 | char *t; | |
1028 | int r, fd; | |
1029 | ||
1030 | assert(path); | |
1031 | assert(_f); | |
1032 | assert(_temp_path); | |
1033 | ||
1034 | r = tempfn_xxxxxx(path, NULL, &t); | |
1035 | if (r < 0) | |
1036 | return r; | |
1037 | ||
1038 | fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC); | |
1039 | if (fd < 0) { | |
1040 | free(t); | |
1041 | return -errno; | |
1042 | } | |
1043 | ||
1044 | f = fdopen(fd, "we"); | |
1045 | if (!f) { | |
1046 | unlink_noerrno(t); | |
1047 | free(t); | |
1048 | safe_close(fd); | |
1049 | return -errno; | |
1050 | } | |
1051 | ||
1052 | *_f = f; | |
1053 | *_temp_path = t; | |
1054 | ||
1055 | return 0; | |
1056 | } | |
1057 | ||
1058 | int fflush_and_check(FILE *f) { | |
1059 | assert(f); | |
1060 | ||
1061 | errno = 0; | |
1062 | fflush(f); | |
1063 | ||
1064 | if (ferror(f)) | |
f5e5c28f | 1065 | return errno > 0 ? -errno : -EIO; |
0d39fa9c LP |
1066 | |
1067 | return 0; | |
1068 | } | |
1069 | ||
61233823 | 1070 | /* This is much like mkostemp() but is subject to umask(). */ |
0d39fa9c | 1071 | int mkostemp_safe(char *pattern, int flags) { |
3587161a | 1072 | _cleanup_umask_ mode_t u = 0; |
0d39fa9c LP |
1073 | int fd; |
1074 | ||
1075 | assert(pattern); | |
1076 | ||
1077 | u = umask(077); | |
1078 | ||
1079 | fd = mkostemp(pattern, flags); | |
1080 | if (fd < 0) | |
1081 | return -errno; | |
1082 | ||
1083 | return fd; | |
1084 | } | |
1085 | ||
0d39fa9c LP |
1086 | int tempfn_xxxxxx(const char *p, const char *extra, char **ret) { |
1087 | const char *fn; | |
1088 | char *t; | |
1089 | ||
1090 | assert(p); | |
1091 | assert(ret); | |
1092 | ||
1093 | /* | |
1094 | * Turns this: | |
1095 | * /foo/bar/waldo | |
1096 | * | |
1097 | * Into this: | |
1098 | * /foo/bar/.#<extra>waldoXXXXXX | |
1099 | */ | |
1100 | ||
1101 | fn = basename(p); | |
1102 | if (!filename_is_valid(fn)) | |
1103 | return -EINVAL; | |
1104 | ||
1105 | if (extra == NULL) | |
1106 | extra = ""; | |
1107 | ||
1108 | t = new(char, strlen(p) + 2 + strlen(extra) + 6 + 1); | |
1109 | if (!t) | |
1110 | return -ENOMEM; | |
1111 | ||
1112 | strcpy(stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn), "XXXXXX"); | |
1113 | ||
1114 | *ret = path_kill_slashes(t); | |
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | int tempfn_random(const char *p, const char *extra, char **ret) { | |
1119 | const char *fn; | |
1120 | char *t, *x; | |
1121 | uint64_t u; | |
1122 | unsigned i; | |
1123 | ||
1124 | assert(p); | |
1125 | assert(ret); | |
1126 | ||
1127 | /* | |
1128 | * Turns this: | |
1129 | * /foo/bar/waldo | |
1130 | * | |
1131 | * Into this: | |
1132 | * /foo/bar/.#<extra>waldobaa2a261115984a9 | |
1133 | */ | |
1134 | ||
1135 | fn = basename(p); | |
1136 | if (!filename_is_valid(fn)) | |
1137 | return -EINVAL; | |
1138 | ||
1139 | if (!extra) | |
1140 | extra = ""; | |
1141 | ||
1142 | t = new(char, strlen(p) + 2 + strlen(extra) + 16 + 1); | |
1143 | if (!t) | |
1144 | return -ENOMEM; | |
1145 | ||
1146 | x = stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn); | |
1147 | ||
1148 | u = random_u64(); | |
1149 | for (i = 0; i < 16; i++) { | |
1150 | *(x++) = hexchar(u & 0xF); | |
1151 | u >>= 4; | |
1152 | } | |
1153 | ||
1154 | *x = 0; | |
1155 | ||
1156 | *ret = path_kill_slashes(t); | |
1157 | return 0; | |
1158 | } | |
1159 | ||
1160 | int tempfn_random_child(const char *p, const char *extra, char **ret) { | |
1161 | char *t, *x; | |
1162 | uint64_t u; | |
1163 | unsigned i; | |
992e8f22 | 1164 | int r; |
0d39fa9c | 1165 | |
0d39fa9c LP |
1166 | assert(ret); |
1167 | ||
1168 | /* Turns this: | |
1169 | * /foo/bar/waldo | |
1170 | * Into this: | |
1171 | * /foo/bar/waldo/.#<extra>3c2b6219aa75d7d0 | |
1172 | */ | |
1173 | ||
992e8f22 LP |
1174 | if (!p) { |
1175 | r = tmp_dir(&p); | |
1176 | if (r < 0) | |
1177 | return r; | |
1178 | } | |
1179 | ||
0d39fa9c LP |
1180 | if (!extra) |
1181 | extra = ""; | |
1182 | ||
1183 | t = new(char, strlen(p) + 3 + strlen(extra) + 16 + 1); | |
1184 | if (!t) | |
1185 | return -ENOMEM; | |
1186 | ||
1187 | x = stpcpy(stpcpy(stpcpy(t, p), "/.#"), extra); | |
1188 | ||
1189 | u = random_u64(); | |
1190 | for (i = 0; i < 16; i++) { | |
1191 | *(x++) = hexchar(u & 0xF); | |
1192 | u >>= 4; | |
1193 | } | |
1194 | ||
1195 | *x = 0; | |
1196 | ||
1197 | *ret = path_kill_slashes(t); | |
1198 | return 0; | |
1199 | } | |
33d52ab9 LP |
1200 | |
1201 | int write_timestamp_file_atomic(const char *fn, usec_t n) { | |
1202 | char ln[DECIMAL_STR_MAX(n)+2]; | |
1203 | ||
1204 | /* Creates a "timestamp" file, that contains nothing but a | |
1205 | * usec_t timestamp, formatted in ASCII. */ | |
1206 | ||
1207 | if (n <= 0 || n >= USEC_INFINITY) | |
1208 | return -ERANGE; | |
1209 | ||
1210 | xsprintf(ln, USEC_FMT "\n", n); | |
1211 | ||
1212 | return write_string_file(fn, ln, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC); | |
1213 | } | |
1214 | ||
1215 | int read_timestamp_file(const char *fn, usec_t *ret) { | |
1216 | _cleanup_free_ char *ln = NULL; | |
1217 | uint64_t t; | |
1218 | int r; | |
1219 | ||
1220 | r = read_one_line_file(fn, &ln); | |
1221 | if (r < 0) | |
1222 | return r; | |
1223 | ||
1224 | r = safe_atou64(ln, &t); | |
1225 | if (r < 0) | |
1226 | return r; | |
1227 | ||
1228 | if (t <= 0 || t >= (uint64_t) USEC_INFINITY) | |
1229 | return -ERANGE; | |
1230 | ||
1231 | *ret = (usec_t) t; | |
1232 | return 0; | |
1233 | } | |
d390f8ef LP |
1234 | |
1235 | int fputs_with_space(FILE *f, const char *s, const char *separator, bool *space) { | |
1236 | int r; | |
1237 | ||
1238 | assert(s); | |
1239 | ||
1240 | /* Outputs the specified string with fputs(), but optionally prefixes it with a separator. The *space parameter | |
1241 | * when specified shall initially point to a boolean variable initialized to false. It is set to true after the | |
1242 | * first invocation. This call is supposed to be use in loops, where a separator shall be inserted between each | |
1243 | * element, but not before the first one. */ | |
1244 | ||
1245 | if (!f) | |
1246 | f = stdout; | |
1247 | ||
1248 | if (space) { | |
1249 | if (!separator) | |
1250 | separator = " "; | |
1251 | ||
1252 | if (*space) { | |
1253 | r = fputs(separator, f); | |
1254 | if (r < 0) | |
1255 | return r; | |
1256 | } | |
1257 | ||
1258 | *space = true; | |
1259 | } | |
1260 | ||
1261 | return fputs(s, f); | |
1262 | } | |
03532f0a LP |
1263 | |
1264 | int open_tmpfile_unlinkable(const char *directory, int flags) { | |
1265 | char *p; | |
992e8f22 | 1266 | int fd, r; |
03532f0a | 1267 | |
992e8f22 LP |
1268 | if (!directory) { |
1269 | r = tmp_dir(&directory); | |
1270 | if (r < 0) | |
1271 | return r; | |
1272 | } | |
03532f0a LP |
1273 | |
1274 | /* Returns an unlinked temporary file that cannot be linked into the file system anymore */ | |
1275 | ||
1276 | #ifdef O_TMPFILE | |
1277 | /* Try O_TMPFILE first, if it is supported */ | |
1278 | fd = open(directory, flags|O_TMPFILE|O_EXCL, S_IRUSR|S_IWUSR); | |
1279 | if (fd >= 0) | |
1280 | return fd; | |
1281 | #endif | |
1282 | ||
1283 | /* Fall back to unguessable name + unlinking */ | |
1284 | p = strjoina(directory, "/systemd-tmp-XXXXXX"); | |
1285 | ||
1286 | fd = mkostemp_safe(p, flags); | |
1287 | if (fd < 0) | |
1288 | return fd; | |
1289 | ||
1290 | (void) unlink(p); | |
1291 | ||
1292 | return fd; | |
1293 | } | |
1294 | ||
1295 | int open_tmpfile_linkable(const char *target, int flags, char **ret_path) { | |
1296 | _cleanup_free_ char *tmp = NULL; | |
1297 | int r, fd; | |
1298 | ||
1299 | assert(target); | |
1300 | assert(ret_path); | |
1301 | ||
1302 | /* Don't allow O_EXCL, as that has a special meaning for O_TMPFILE */ | |
1303 | assert((flags & O_EXCL) == 0); | |
1304 | ||
1305 | /* Creates a temporary file, that shall be renamed to "target" later. If possible, this uses O_TMPFILE – in | |
1306 | * which case "ret_path" will be returned as NULL. If not possible a the tempoary path name used is returned in | |
1307 | * "ret_path". Use link_tmpfile() below to rename the result after writing the file in full. */ | |
1308 | ||
1309 | #ifdef O_TMPFILE | |
1310 | { | |
1311 | _cleanup_free_ char *dn = NULL; | |
1312 | ||
1313 | dn = dirname_malloc(target); | |
1314 | if (!dn) | |
1315 | return -ENOMEM; | |
1316 | ||
1317 | fd = open(dn, O_TMPFILE|flags, 0640); | |
1318 | if (fd >= 0) { | |
1319 | *ret_path = NULL; | |
1320 | return fd; | |
1321 | } | |
1322 | ||
1323 | log_debug_errno(errno, "Failed to use O_TMPFILE on %s: %m", dn); | |
1324 | } | |
1325 | #endif | |
1326 | ||
1327 | r = tempfn_random(target, NULL, &tmp); | |
1328 | if (r < 0) | |
1329 | return r; | |
1330 | ||
1331 | fd = open(tmp, O_CREAT|O_EXCL|O_NOFOLLOW|O_NOCTTY|flags, 0640); | |
1332 | if (fd < 0) | |
1333 | return -errno; | |
1334 | ||
1335 | *ret_path = tmp; | |
1336 | tmp = NULL; | |
1337 | ||
1338 | return fd; | |
1339 | } | |
1340 | ||
1341 | int link_tmpfile(int fd, const char *path, const char *target) { | |
1342 | ||
1343 | assert(fd >= 0); | |
1344 | assert(target); | |
1345 | ||
1346 | /* Moves a temporary file created with open_tmpfile() above into its final place. if "path" is NULL an fd | |
1347 | * created with O_TMPFILE is assumed, and linkat() is used. Otherwise it is assumed O_TMPFILE is not supported | |
1348 | * on the directory, and renameat2() is used instead. | |
1349 | * | |
f8e2f4d6 | 1350 | * Note that in both cases we will not replace existing files. This is because linkat() does not support this |
03532f0a LP |
1351 | * operation currently (renameat2() does), and there is no nice way to emulate this. */ |
1352 | ||
1353 | if (path) { | |
1354 | if (rename_noreplace(AT_FDCWD, path, AT_FDCWD, target) < 0) | |
1355 | return -errno; | |
1356 | } else { | |
1357 | char proc_fd_path[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(fd) + 1]; | |
1358 | ||
1359 | xsprintf(proc_fd_path, "/proc/self/fd/%i", fd); | |
1360 | ||
1361 | if (linkat(AT_FDCWD, proc_fd_path, AT_FDCWD, target, AT_SYMLINK_FOLLOW) < 0) | |
1362 | return -errno; | |
1363 | } | |
1364 | ||
1365 | return 0; | |
1366 | } | |
03c2b288 LP |
1367 | |
1368 | int read_nul_string(FILE *f, char **ret) { | |
1369 | _cleanup_free_ char *x = NULL; | |
1370 | size_t allocated = 0, n = 0; | |
1371 | ||
1372 | assert(f); | |
1373 | assert(ret); | |
1374 | ||
1375 | /* Reads a NUL-terminated string from the specified file. */ | |
1376 | ||
1377 | for (;;) { | |
1378 | int c; | |
1379 | ||
1380 | if (!GREEDY_REALLOC(x, allocated, n+2)) | |
1381 | return -ENOMEM; | |
1382 | ||
1383 | c = fgetc(f); | |
1384 | if (c == 0) /* Terminate at NUL byte */ | |
1385 | break; | |
1386 | if (c == EOF) { | |
1387 | if (ferror(f)) | |
1388 | return -errno; | |
1389 | break; /* Terminate at EOF */ | |
1390 | } | |
1391 | ||
1392 | x[n++] = (char) c; | |
1393 | } | |
1394 | ||
1395 | if (x) | |
1396 | x[n] = 0; | |
1397 | else { | |
1398 | x = new0(char, 1); | |
1399 | if (!x) | |
1400 | return -ENOMEM; | |
1401 | } | |
1402 | ||
1403 | *ret = x; | |
1404 | x = NULL; | |
1405 | ||
1406 | return 0; | |
1407 | } |