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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
ed5bcfbe | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
ed5bcfbe LP |
22 | #include <string.h> |
23 | #include <stdio.h> | |
24 | #include <errno.h> | |
25 | #include <assert.h> | |
26 | #include <stdlib.h> | |
27 | ||
28 | #include "conf-parser.h" | |
29 | #include "util.h" | |
30 | #include "macro.h" | |
57d42a5f | 31 | #include "strv.h" |
16354eff | 32 | #include "log.h" |
ed5bcfbe | 33 | |
ed5bcfbe LP |
34 | /* Run the user supplied parser for an assignment */ |
35 | static int next_assignment( | |
36 | const char *filename, | |
37 | unsigned line, | |
38 | const char *section, | |
39 | const ConfigItem *t, | |
10e87ee7 | 40 | bool relaxed, |
ed5bcfbe LP |
41 | const char *lvalue, |
42 | const char *rvalue, | |
43 | void *userdata) { | |
44 | ||
45 | assert(filename); | |
46 | assert(t); | |
47 | assert(lvalue); | |
48 | assert(rvalue); | |
49 | ||
827119a9 | 50 | for (; t->parse || t->lvalue; t++) { |
ed5bcfbe LP |
51 | |
52 | if (t->lvalue && !streq(lvalue, t->lvalue)) | |
53 | continue; | |
54 | ||
55 | if (t->section && !section) | |
56 | continue; | |
57 | ||
58 | if (t->section && !streq(section, t->section)) | |
59 | continue; | |
60 | ||
10e87ee7 LP |
61 | if (!t->parse) |
62 | return 0; | |
63 | ||
2b583ce6 | 64 | return t->parse(filename, line, section, lvalue, t->ltype, rvalue, t->data, userdata); |
ed5bcfbe LP |
65 | } |
66 | ||
46205bb6 | 67 | /* Warn about unknown non-extension fields. */ |
10e87ee7 | 68 | if (!relaxed && !startswith(lvalue, "X-")) |
46205bb6 LP |
69 | log_info("[%s:%u] Unknown lvalue '%s' in section '%s'. Ignoring.", filename, line, lvalue, strna(section)); |
70 | ||
f1857be0 | 71 | return 0; |
ed5bcfbe LP |
72 | } |
73 | ||
ed5bcfbe | 74 | /* Parse a variable assignment line */ |
10e87ee7 | 75 | static int parse_line(const char *filename, unsigned line, char **section, const char* const * sections, const ConfigItem *t, bool relaxed, char *l, void *userdata) { |
b2aa81ef | 76 | char *e; |
ed5bcfbe | 77 | |
b2aa81ef | 78 | l = strstrip(l); |
ed5bcfbe | 79 | |
b2aa81ef | 80 | if (!*l) |
ed5bcfbe | 81 | return 0; |
1ea86b18 | 82 | |
b2aa81ef | 83 | if (strchr(COMMENTS, *l)) |
1ea86b18 | 84 | return 0; |
ed5bcfbe | 85 | |
b2aa81ef LP |
86 | if (startswith(l, ".include ")) { |
87 | char *fn; | |
ed5bcfbe LP |
88 | int r; |
89 | ||
b2aa81ef LP |
90 | if (!(fn = file_in_same_dir(filename, strstrip(l+9)))) |
91 | return -ENOMEM; | |
ed5bcfbe | 92 | |
10e87ee7 | 93 | r = config_parse(fn, NULL, sections, t, relaxed, userdata); |
b2aa81ef LP |
94 | free(fn); |
95 | ||
ed5bcfbe LP |
96 | return r; |
97 | } | |
98 | ||
b2aa81ef | 99 | if (*l == '[') { |
ed5bcfbe LP |
100 | size_t k; |
101 | char *n; | |
102 | ||
b2aa81ef | 103 | k = strlen(l); |
ed5bcfbe LP |
104 | assert(k > 0); |
105 | ||
b2aa81ef | 106 | if (l[k-1] != ']') { |
16354eff | 107 | log_error("[%s:%u] Invalid section header.", filename, line); |
ed5bcfbe LP |
108 | return -EBADMSG; |
109 | } | |
110 | ||
b2aa81ef | 111 | if (!(n = strndup(l+1, k-2))) |
ed5bcfbe LP |
112 | return -ENOMEM; |
113 | ||
10e87ee7 LP |
114 | if (!relaxed && sections && !strv_contains((char**) sections, n)) |
115 | log_info("[%s:%u] Unknown section '%s'. Ignoring.", filename, line, n); | |
42f4e3c4 | 116 | |
ed5bcfbe LP |
117 | free(*section); |
118 | *section = n; | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
449648c4 | 123 | if (sections && (!*section || !strv_contains((char**) sections, *section))) |
10e87ee7 LP |
124 | return 0; |
125 | ||
b2aa81ef | 126 | if (!(e = strchr(l, '='))) { |
16354eff | 127 | log_error("[%s:%u] Missing '='.", filename, line); |
ed5bcfbe LP |
128 | return -EBADMSG; |
129 | } | |
130 | ||
131 | *e = 0; | |
132 | e++; | |
133 | ||
10e87ee7 | 134 | return next_assignment(filename, line, *section, t, relaxed, strstrip(l), strstrip(e), userdata); |
ed5bcfbe LP |
135 | } |
136 | ||
137 | /* Go through the file and parse each line */ | |
10e87ee7 | 138 | int config_parse(const char *filename, FILE *f, const char* const * sections, const ConfigItem *t, bool relaxed, void *userdata) { |
ed5bcfbe LP |
139 | unsigned line = 0; |
140 | char *section = NULL; | |
ed5bcfbe | 141 | int r; |
63ad1ab4 | 142 | bool ours = false; |
3dab2943 | 143 | char *continuation = NULL; |
ed5bcfbe LP |
144 | |
145 | assert(filename); | |
146 | assert(t); | |
147 | ||
87f0e418 LP |
148 | if (!f) { |
149 | if (!(f = fopen(filename, "re"))) { | |
150 | r = -errno; | |
151 | log_error("Failed to open configuration file '%s': %s", filename, strerror(-r)); | |
152 | goto finish; | |
153 | } | |
63ad1ab4 LP |
154 | |
155 | ours = true; | |
ed5bcfbe LP |
156 | } |
157 | ||
158 | while (!feof(f)) { | |
3dab2943 LP |
159 | char l[LINE_MAX], *p, *c = NULL, *e; |
160 | bool escaped = false; | |
ed5bcfbe LP |
161 | |
162 | if (!fgets(l, sizeof(l), f)) { | |
163 | if (feof(f)) | |
164 | break; | |
165 | ||
166 | r = -errno; | |
16354eff | 167 | log_error("Failed to read configuration file '%s': %s", filename, strerror(-r)); |
ed5bcfbe LP |
168 | goto finish; |
169 | } | |
170 | ||
3dab2943 LP |
171 | truncate_nl(l); |
172 | ||
173 | if (continuation) { | |
174 | if (!(c = strappend(continuation, l))) { | |
175 | r = -ENOMEM; | |
176 | goto finish; | |
177 | } | |
178 | ||
179 | free(continuation); | |
180 | continuation = NULL; | |
181 | p = c; | |
182 | } else | |
183 | p = l; | |
184 | ||
185 | for (e = p; *e; e++) { | |
186 | if (escaped) | |
187 | escaped = false; | |
188 | else if (*e == '\\') | |
189 | escaped = true; | |
190 | } | |
191 | ||
192 | if (escaped) { | |
193 | *(e-1) = ' '; | |
194 | ||
195 | if (c) | |
196 | continuation = c; | |
197 | else if (!(continuation = strdup(l))) { | |
198 | r = -ENOMEM; | |
199 | goto finish; | |
200 | } | |
201 | ||
202 | continue; | |
203 | } | |
204 | ||
205 | r = parse_line(filename, ++line, §ion, sections, t, relaxed, p, userdata); | |
206 | free(c); | |
207 | ||
208 | if (r < 0) | |
ed5bcfbe LP |
209 | goto finish; |
210 | } | |
211 | ||
212 | r = 0; | |
213 | ||
214 | finish: | |
215 | free(section); | |
3dab2943 | 216 | free(continuation); |
ed5bcfbe | 217 | |
63ad1ab4 | 218 | if (f && ours) |
ed5bcfbe LP |
219 | fclose(f); |
220 | ||
221 | return r; | |
222 | } | |
223 | ||
224 | int config_parse_int( | |
225 | const char *filename, | |
226 | unsigned line, | |
227 | const char *section, | |
228 | const char *lvalue, | |
2b583ce6 | 229 | int ltype, |
ed5bcfbe LP |
230 | const char *rvalue, |
231 | void *data, | |
232 | void *userdata) { | |
233 | ||
234 | int *i = data; | |
235 | int r; | |
236 | ||
237 | assert(filename); | |
238 | assert(lvalue); | |
239 | assert(rvalue); | |
240 | assert(data); | |
241 | ||
242 | if ((r = safe_atoi(rvalue, i)) < 0) { | |
16354eff | 243 | log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue); |
ed5bcfbe LP |
244 | return r; |
245 | } | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
ec863ba6 LP |
250 | int config_parse_uint64( |
251 | const char *filename, | |
252 | unsigned line, | |
253 | const char *section, | |
254 | const char *lvalue, | |
2b583ce6 | 255 | int ltype, |
ec863ba6 LP |
256 | const char *rvalue, |
257 | void *data, | |
258 | void *userdata) { | |
259 | ||
260 | uint64_t *u = data; | |
261 | int r; | |
262 | ||
263 | assert(filename); | |
264 | assert(lvalue); | |
265 | assert(rvalue); | |
266 | assert(data); | |
267 | ||
268 | if ((r = safe_atou64(rvalue, u)) < 0) { | |
269 | log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue); | |
270 | return r; | |
271 | } | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
ed5bcfbe LP |
276 | int config_parse_unsigned( |
277 | const char *filename, | |
278 | unsigned line, | |
279 | const char *section, | |
280 | const char *lvalue, | |
2b583ce6 | 281 | int ltype, |
ed5bcfbe LP |
282 | const char *rvalue, |
283 | void *data, | |
284 | void *userdata) { | |
285 | ||
286 | unsigned *u = data; | |
287 | int r; | |
288 | ||
289 | assert(filename); | |
290 | assert(lvalue); | |
291 | assert(rvalue); | |
292 | assert(data); | |
293 | ||
294 | if ((r = safe_atou(rvalue, u)) < 0) { | |
16354eff | 295 | log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue); |
ed5bcfbe LP |
296 | return r; |
297 | } | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | int config_parse_size( | |
303 | const char *filename, | |
304 | unsigned line, | |
305 | const char *section, | |
306 | const char *lvalue, | |
2b583ce6 | 307 | int ltype, |
ed5bcfbe LP |
308 | const char *rvalue, |
309 | void *data, | |
310 | void *userdata) { | |
311 | ||
312 | size_t *sz = data; | |
313 | unsigned u; | |
314 | int r; | |
315 | ||
316 | assert(filename); | |
317 | assert(lvalue); | |
318 | assert(rvalue); | |
319 | assert(data); | |
320 | ||
321 | if ((r = safe_atou(rvalue, &u)) < 0) { | |
16354eff | 322 | log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue); |
ed5bcfbe LP |
323 | return r; |
324 | } | |
325 | ||
326 | *sz = (size_t) u; | |
327 | return 0; | |
328 | } | |
329 | ||
330 | int config_parse_bool( | |
331 | const char *filename, | |
332 | unsigned line, | |
333 | const char *section, | |
334 | const char *lvalue, | |
2b583ce6 | 335 | int ltype, |
ed5bcfbe LP |
336 | const char *rvalue, |
337 | void *data, | |
338 | void *userdata) { | |
339 | ||
340 | int k; | |
341 | bool *b = data; | |
342 | ||
343 | assert(filename); | |
344 | assert(lvalue); | |
345 | assert(rvalue); | |
346 | assert(data); | |
347 | ||
348 | if ((k = parse_boolean(rvalue)) < 0) { | |
16354eff | 349 | log_error("[%s:%u] Failed to parse boolean value: %s", filename, line, rvalue); |
ed5bcfbe LP |
350 | return k; |
351 | } | |
352 | ||
353 | *b = !!k; | |
354 | return 0; | |
355 | } | |
356 | ||
357 | int config_parse_string( | |
358 | const char *filename, | |
359 | unsigned line, | |
360 | const char *section, | |
361 | const char *lvalue, | |
2b583ce6 | 362 | int ltype, |
ed5bcfbe LP |
363 | const char *rvalue, |
364 | void *data, | |
365 | void *userdata) { | |
366 | ||
367 | char **s = data; | |
368 | char *n; | |
369 | ||
370 | assert(filename); | |
371 | assert(lvalue); | |
372 | assert(rvalue); | |
373 | assert(data); | |
374 | ||
375 | if (*rvalue) { | |
376 | if (!(n = strdup(rvalue))) | |
377 | return -ENOMEM; | |
378 | } else | |
379 | n = NULL; | |
380 | ||
381 | free(*s); | |
382 | *s = n; | |
383 | ||
384 | return 0; | |
385 | } | |
57d42a5f | 386 | |
034c6ed7 LP |
387 | int config_parse_path( |
388 | const char *filename, | |
389 | unsigned line, | |
390 | const char *section, | |
391 | const char *lvalue, | |
2b583ce6 | 392 | int ltype, |
034c6ed7 LP |
393 | const char *rvalue, |
394 | void *data, | |
395 | void *userdata) { | |
396 | ||
397 | char **s = data; | |
398 | char *n; | |
399 | ||
400 | assert(filename); | |
401 | assert(lvalue); | |
402 | assert(rvalue); | |
403 | assert(data); | |
404 | ||
15ae422b | 405 | if (!path_is_absolute(rvalue)) { |
034c6ed7 LP |
406 | log_error("[%s:%u] Not an absolute path: %s", filename, line, rvalue); |
407 | return -EINVAL; | |
408 | } | |
409 | ||
410 | if (!(n = strdup(rvalue))) | |
411 | return -ENOMEM; | |
412 | ||
01f78473 LP |
413 | path_kill_slashes(n); |
414 | ||
034c6ed7 LP |
415 | free(*s); |
416 | *s = n; | |
417 | ||
418 | return 0; | |
419 | } | |
57d42a5f LP |
420 | |
421 | int config_parse_strv( | |
422 | const char *filename, | |
423 | unsigned line, | |
424 | const char *section, | |
425 | const char *lvalue, | |
2b583ce6 | 426 | int ltype, |
57d42a5f LP |
427 | const char *rvalue, |
428 | void *data, | |
429 | void *userdata) { | |
430 | ||
431 | char*** sv = data; | |
432 | char **n; | |
433 | char *w; | |
434 | unsigned k; | |
435 | size_t l; | |
436 | char *state; | |
437 | ||
438 | assert(filename); | |
439 | assert(lvalue); | |
440 | assert(rvalue); | |
441 | assert(data); | |
442 | ||
443 | k = strv_length(*sv); | |
034c6ed7 | 444 | FOREACH_WORD_QUOTED(w, l, rvalue, state) |
57d42a5f LP |
445 | k++; |
446 | ||
447 | if (!(n = new(char*, k+1))) | |
448 | return -ENOMEM; | |
449 | ||
3251df7d LP |
450 | if (*sv) |
451 | for (k = 0; (*sv)[k]; k++) | |
452 | n[k] = (*sv)[k]; | |
7418040c LP |
453 | else |
454 | k = 0; | |
3251df7d | 455 | |
034c6ed7 | 456 | FOREACH_WORD_QUOTED(w, l, rvalue, state) |
f60f22df | 457 | if (!(n[k++] = cunescape_length(w, l))) |
57d42a5f LP |
458 | goto fail; |
459 | ||
460 | n[k] = NULL; | |
461 | free(*sv); | |
462 | *sv = n; | |
463 | ||
464 | return 0; | |
465 | ||
466 | fail: | |
467 | for (; k > 0; k--) | |
468 | free(n[k-1]); | |
034c6ed7 | 469 | free(n); |
57d42a5f LP |
470 | |
471 | return -ENOMEM; | |
472 | } | |
15ae422b LP |
473 | |
474 | int config_parse_path_strv( | |
475 | const char *filename, | |
476 | unsigned line, | |
477 | const char *section, | |
478 | const char *lvalue, | |
2b583ce6 | 479 | int ltype, |
15ae422b LP |
480 | const char *rvalue, |
481 | void *data, | |
482 | void *userdata) { | |
483 | ||
484 | char*** sv = data; | |
485 | char **n; | |
486 | char *w; | |
487 | unsigned k; | |
488 | size_t l; | |
489 | char *state; | |
490 | int r; | |
491 | ||
492 | assert(filename); | |
493 | assert(lvalue); | |
494 | assert(rvalue); | |
495 | assert(data); | |
496 | ||
497 | k = strv_length(*sv); | |
498 | FOREACH_WORD_QUOTED(w, l, rvalue, state) | |
499 | k++; | |
500 | ||
501 | if (!(n = new(char*, k+1))) | |
502 | return -ENOMEM; | |
503 | ||
504 | k = 0; | |
505 | if (*sv) | |
506 | for (; (*sv)[k]; k++) | |
507 | n[k] = (*sv)[k]; | |
508 | ||
509 | FOREACH_WORD_QUOTED(w, l, rvalue, state) { | |
f60f22df | 510 | if (!(n[k] = cunescape_length(w, l))) { |
15ae422b LP |
511 | r = -ENOMEM; |
512 | goto fail; | |
513 | } | |
514 | ||
515 | if (!path_is_absolute(n[k])) { | |
516 | log_error("[%s:%u] Not an absolute path: %s", filename, line, rvalue); | |
517 | r = -EINVAL; | |
518 | goto fail; | |
519 | } | |
520 | ||
01f78473 LP |
521 | path_kill_slashes(n[k]); |
522 | ||
15ae422b LP |
523 | k++; |
524 | } | |
525 | ||
526 | n[k] = NULL; | |
527 | free(*sv); | |
528 | *sv = n; | |
529 | ||
530 | return 0; | |
531 | ||
532 | fail: | |
533 | free(n[k]); | |
534 | for (; k > 0; k--) | |
535 | free(n[k-1]); | |
536 | free(n); | |
537 | ||
538 | return r; | |
539 | } |