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