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[thirdparty/systemd.git] / src / shared / conf-parser.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
2 /***
3 This file is part of systemd.
4
5 Copyright 2010 Lennart Poettering
6 ***/
7
8 #include <errno.h>
9 #include <limits.h>
10 #include <stdint.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <sys/types.h>
15
16 #include "alloc-util.h"
17 #include "conf-files.h"
18 #include "conf-parser.h"
19 #include "def.h"
20 #include "extract-word.h"
21 #include "fd-util.h"
22 #include "fileio.h"
23 #include "fs-util.h"
24 #include "log.h"
25 #include "macro.h"
26 #include "parse-util.h"
27 #include "path-util.h"
28 #include "process-util.h"
29 #include "signal-util.h"
30 #include "socket-util.h"
31 #include "string-util.h"
32 #include "strv.h"
33 #include "syslog-util.h"
34 #include "time-util.h"
35 #include "utf8.h"
36 #include "rlimit-util.h"
37
38 int config_item_table_lookup(
39 const void *table,
40 const char *section,
41 const char *lvalue,
42 ConfigParserCallback *func,
43 int *ltype,
44 void **data,
45 void *userdata) {
46
47 const ConfigTableItem *t;
48
49 assert(table);
50 assert(lvalue);
51 assert(func);
52 assert(ltype);
53 assert(data);
54
55 for (t = table; t->lvalue; t++) {
56
57 if (!streq(lvalue, t->lvalue))
58 continue;
59
60 if (!streq_ptr(section, t->section))
61 continue;
62
63 *func = t->parse;
64 *ltype = t->ltype;
65 *data = t->data;
66 return 1;
67 }
68
69 return 0;
70 }
71
72 int config_item_perf_lookup(
73 const void *table,
74 const char *section,
75 const char *lvalue,
76 ConfigParserCallback *func,
77 int *ltype,
78 void **data,
79 void *userdata) {
80
81 ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
82 const ConfigPerfItem *p;
83
84 assert(table);
85 assert(lvalue);
86 assert(func);
87 assert(ltype);
88 assert(data);
89
90 if (!section)
91 p = lookup(lvalue, strlen(lvalue));
92 else {
93 char *key;
94
95 key = strjoin(section, ".", lvalue);
96 if (!key)
97 return -ENOMEM;
98
99 p = lookup(key, strlen(key));
100 free(key);
101 }
102
103 if (!p)
104 return 0;
105
106 *func = p->parse;
107 *ltype = p->ltype;
108 *data = (uint8_t*) userdata + p->offset;
109 return 1;
110 }
111
112 /* Run the user supplied parser for an assignment */
113 static int next_assignment(
114 const char *unit,
115 const char *filename,
116 unsigned line,
117 ConfigItemLookup lookup,
118 const void *table,
119 const char *section,
120 unsigned section_line,
121 const char *lvalue,
122 const char *rvalue,
123 ConfigParseFlags flags,
124 void *userdata) {
125
126 ConfigParserCallback func = NULL;
127 int ltype = 0;
128 void *data = NULL;
129 int r;
130
131 assert(filename);
132 assert(line > 0);
133 assert(lookup);
134 assert(lvalue);
135 assert(rvalue);
136
137 r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
138 if (r < 0)
139 return r;
140
141 if (r > 0) {
142 if (func)
143 return func(unit, filename, line, section, section_line,
144 lvalue, ltype, rvalue, data, userdata);
145
146 return 0;
147 }
148
149 /* Warn about unknown non-extension fields. */
150 if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(lvalue, "X-"))
151 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown lvalue '%s' in section '%s'", lvalue, section);
152
153 return 0;
154 }
155
156 /* Parse a single logical line */
157 static int parse_line(
158 const char* unit,
159 const char *filename,
160 unsigned line,
161 const char *sections,
162 ConfigItemLookup lookup,
163 const void *table,
164 ConfigParseFlags flags,
165 char **section,
166 unsigned *section_line,
167 bool *section_ignored,
168 char *l,
169 void *userdata) {
170
171 char *e, *include;
172
173 assert(filename);
174 assert(line > 0);
175 assert(lookup);
176 assert(l);
177
178 l = strstrip(l);
179 if (!*l)
180 return 0;
181
182 if (strchr(COMMENTS "\n", *l))
183 return 0;
184
185 include = first_word(l, ".include");
186 if (include) {
187 _cleanup_free_ char *fn = NULL;
188
189 /* .includes are a bad idea, we only support them here
190 * for historical reasons. They create cyclic include
191 * problems and make it difficult to detect
192 * configuration file changes with an easy
193 * stat(). Better approaches, such as .d/ drop-in
194 * snippets exist.
195 *
196 * Support for them should be eventually removed. */
197
198 if (!(flags & CONFIG_PARSE_ALLOW_INCLUDE)) {
199 log_syntax(unit, LOG_ERR, filename, line, 0, ".include not allowed here. Ignoring.");
200 return 0;
201 }
202
203 log_syntax(unit, LOG_WARNING, filename, line, 0,
204 ".include directives are deprecated, and support for them will be removed in a future version of systemd. "
205 "Please use drop-in files instead.");
206
207 fn = file_in_same_dir(filename, strstrip(include));
208 if (!fn)
209 return -ENOMEM;
210
211 return config_parse(unit, fn, NULL, sections, lookup, table, flags, userdata);
212 }
213
214 if (!utf8_is_valid(l))
215 return log_syntax_invalid_utf8(unit, LOG_WARNING, filename, line, l);
216
217 if (*l == '[') {
218 size_t k;
219 char *n;
220
221 k = strlen(l);
222 assert(k > 0);
223
224 if (l[k-1] != ']') {
225 log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid section header '%s'", l);
226 return -EBADMSG;
227 }
228
229 n = strndup(l+1, k-2);
230 if (!n)
231 return -ENOMEM;
232
233 if (sections && !nulstr_contains(sections, n)) {
234
235 if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(n, "X-"))
236 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n);
237
238 free(n);
239 *section = mfree(*section);
240 *section_line = 0;
241 *section_ignored = true;
242 } else {
243 free_and_replace(*section, n);
244 *section_line = line;
245 *section_ignored = false;
246 }
247
248 return 0;
249 }
250
251 if (sections && !*section) {
252
253 if (!(flags & CONFIG_PARSE_RELAXED) && !*section_ignored)
254 log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring.");
255
256 return 0;
257 }
258
259 e = strchr(l, '=');
260 if (!e) {
261 log_syntax(unit, LOG_WARNING, filename, line, 0, "Missing '='.");
262 return -EINVAL;
263 }
264
265 *e = 0;
266 e++;
267
268 return next_assignment(unit,
269 filename,
270 line,
271 lookup,
272 table,
273 *section,
274 *section_line,
275 strstrip(l),
276 strstrip(e),
277 flags,
278 userdata);
279 }
280
281 /* Go through the file and parse each line */
282 int config_parse(const char *unit,
283 const char *filename,
284 FILE *f,
285 const char *sections,
286 ConfigItemLookup lookup,
287 const void *table,
288 ConfigParseFlags flags,
289 void *userdata) {
290
291 _cleanup_free_ char *section = NULL, *continuation = NULL;
292 _cleanup_fclose_ FILE *ours = NULL;
293 unsigned line = 0, section_line = 0;
294 bool section_ignored = false;
295 int r;
296
297 assert(filename);
298 assert(lookup);
299
300 if (!f) {
301 f = ours = fopen(filename, "re");
302 if (!f) {
303 /* Only log on request, except for ENOENT,
304 * since we return 0 to the caller. */
305 if ((flags & CONFIG_PARSE_WARN) || errno == ENOENT)
306 log_full(errno == ENOENT ? LOG_DEBUG : LOG_ERR,
307 "Failed to open configuration file '%s': %m", filename);
308 return errno == ENOENT ? 0 : -errno;
309 }
310 }
311
312 fd_warn_permissions(filename, fileno(f));
313
314 for (;;) {
315 _cleanup_free_ char *buf = NULL;
316 bool escaped = false;
317 char *l, *p, *e;
318
319 r = read_line(f, LONG_LINE_MAX, &buf);
320 if (r == 0)
321 break;
322 if (r == -ENOBUFS) {
323 if (flags & CONFIG_PARSE_WARN)
324 log_error_errno(r, "%s:%u: Line too long", filename, line);
325
326 return r;
327 }
328 if (r < 0) {
329 if (CONFIG_PARSE_WARN)
330 log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
331
332 return r;
333 }
334
335 l = buf;
336 if (!(flags & CONFIG_PARSE_REFUSE_BOM)) {
337 char *q;
338
339 q = startswith(buf, UTF8_BYTE_ORDER_MARK);
340 if (q) {
341 l = q;
342 flags |= CONFIG_PARSE_REFUSE_BOM;
343 }
344 }
345
346 if (continuation) {
347 if (strlen(continuation) + strlen(l) > LONG_LINE_MAX) {
348 if (flags & CONFIG_PARSE_WARN)
349 log_error("%s:%u: Continuation line too long", filename, line);
350 return -ENOBUFS;
351 }
352
353 if (!strextend(&continuation, l, NULL)) {
354 if (flags & CONFIG_PARSE_WARN)
355 log_oom();
356 return -ENOMEM;
357 }
358
359 p = continuation;
360 } else
361 p = l;
362
363 for (e = p; *e; e++) {
364 if (escaped)
365 escaped = false;
366 else if (*e == '\\')
367 escaped = true;
368 }
369
370 if (escaped) {
371 *(e-1) = ' ';
372
373 if (!continuation) {
374 continuation = strdup(l);
375 if (!continuation) {
376 if (flags & CONFIG_PARSE_WARN)
377 log_oom();
378 return -ENOMEM;
379 }
380 }
381
382 continue;
383 }
384
385 r = parse_line(unit,
386 filename,
387 ++line,
388 sections,
389 lookup,
390 table,
391 flags,
392 &section,
393 &section_line,
394 &section_ignored,
395 p,
396 userdata);
397 if (r < 0) {
398 if (flags & CONFIG_PARSE_WARN)
399 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
400 return r;
401 }
402
403 continuation = mfree(continuation);
404 }
405
406 if (continuation) {
407 r = parse_line(unit,
408 filename,
409 ++line,
410 sections,
411 lookup,
412 table,
413 flags,
414 &section,
415 &section_line,
416 &section_ignored,
417 continuation,
418 userdata);
419 if (r < 0) {
420 if (flags & CONFIG_PARSE_WARN)
421 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
422 return r;
423 }
424 }
425
426 return 0;
427 }
428
429 static int config_parse_many_files(
430 const char *conf_file,
431 char **files,
432 const char *sections,
433 ConfigItemLookup lookup,
434 const void *table,
435 ConfigParseFlags flags,
436 void *userdata) {
437
438 char **fn;
439 int r;
440
441 if (conf_file) {
442 r = config_parse(NULL, conf_file, NULL, sections, lookup, table, flags, userdata);
443 if (r < 0)
444 return r;
445 }
446
447 STRV_FOREACH(fn, files) {
448 r = config_parse(NULL, *fn, NULL, sections, lookup, table, flags, userdata);
449 if (r < 0)
450 return r;
451 }
452
453 return 0;
454 }
455
456 /* Parse each config file in the directories specified as nulstr. */
457 int config_parse_many_nulstr(
458 const char *conf_file,
459 const char *conf_file_dirs,
460 const char *sections,
461 ConfigItemLookup lookup,
462 const void *table,
463 ConfigParseFlags flags,
464 void *userdata) {
465
466 _cleanup_strv_free_ char **files = NULL;
467 int r;
468
469 r = conf_files_list_nulstr(&files, ".conf", NULL, 0, conf_file_dirs);
470 if (r < 0)
471 return r;
472
473 return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
474 }
475
476 /* Parse each config file in the directories specified as strv. */
477 int config_parse_many(
478 const char *conf_file,
479 const char* const* conf_file_dirs,
480 const char *dropin_dirname,
481 const char *sections,
482 ConfigItemLookup lookup,
483 const void *table,
484 ConfigParseFlags flags,
485 void *userdata) {
486
487 _cleanup_strv_free_ char **dropin_dirs = NULL;
488 _cleanup_strv_free_ char **files = NULL;
489 const char *suffix;
490 int r;
491
492 suffix = strjoina("/", dropin_dirname);
493 r = strv_extend_strv_concat(&dropin_dirs, (char**) conf_file_dirs, suffix);
494 if (r < 0)
495 return r;
496
497 r = conf_files_list_strv(&files, ".conf", NULL, 0, (const char* const*) dropin_dirs);
498 if (r < 0)
499 return r;
500
501 return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
502 }
503
504 #define DEFINE_PARSER(type, vartype, conv_func) \
505 DEFINE_CONFIG_PARSE_PTR(config_parse_##type, conv_func, vartype, "Failed to parse " #type " value")
506
507 DEFINE_PARSER(int, int, safe_atoi);
508 DEFINE_PARSER(long, long, safe_atoli);
509 DEFINE_PARSER(uint8, uint8_t, safe_atou8);
510 DEFINE_PARSER(uint16, uint16_t, safe_atou16);
511 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
512 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
513 DEFINE_PARSER(unsigned, unsigned, safe_atou);
514 DEFINE_PARSER(double, double, safe_atod);
515 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
516 DEFINE_PARSER(sec, usec_t, parse_sec);
517 DEFINE_PARSER(mode, mode_t, parse_mode);
518
519 int config_parse_iec_size(const char* unit,
520 const char *filename,
521 unsigned line,
522 const char *section,
523 unsigned section_line,
524 const char *lvalue,
525 int ltype,
526 const char *rvalue,
527 void *data,
528 void *userdata) {
529
530 size_t *sz = data;
531 uint64_t v;
532 int r;
533
534 assert(filename);
535 assert(lvalue);
536 assert(rvalue);
537 assert(data);
538
539 r = parse_size(rvalue, 1024, &v);
540 if (r < 0 || (uint64_t) (size_t) v != v) {
541 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
542 return 0;
543 }
544
545 *sz = (size_t) v;
546 return 0;
547 }
548
549 int config_parse_si_size(
550 const char* unit,
551 const char *filename,
552 unsigned line,
553 const char *section,
554 unsigned section_line,
555 const char *lvalue,
556 int ltype,
557 const char *rvalue,
558 void *data,
559 void *userdata) {
560
561 size_t *sz = data;
562 uint64_t v;
563 int r;
564
565 assert(filename);
566 assert(lvalue);
567 assert(rvalue);
568 assert(data);
569
570 r = parse_size(rvalue, 1000, &v);
571 if (r < 0 || (uint64_t) (size_t) v != v) {
572 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
573 return 0;
574 }
575
576 *sz = (size_t) v;
577 return 0;
578 }
579
580 int config_parse_iec_uint64(
581 const char* unit,
582 const char *filename,
583 unsigned line,
584 const char *section,
585 unsigned section_line,
586 const char *lvalue,
587 int ltype,
588 const char *rvalue,
589 void *data,
590 void *userdata) {
591
592 uint64_t *bytes = data;
593 int r;
594
595 assert(filename);
596 assert(lvalue);
597 assert(rvalue);
598 assert(data);
599
600 r = parse_size(rvalue, 1024, bytes);
601 if (r < 0)
602 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
603
604 return 0;
605 }
606
607 int config_parse_bool(const char* unit,
608 const char *filename,
609 unsigned line,
610 const char *section,
611 unsigned section_line,
612 const char *lvalue,
613 int ltype,
614 const char *rvalue,
615 void *data,
616 void *userdata) {
617
618 int k;
619 bool *b = data;
620 bool fatal = ltype;
621
622 assert(filename);
623 assert(lvalue);
624 assert(rvalue);
625 assert(data);
626
627 k = parse_boolean(rvalue);
628 if (k < 0) {
629 log_syntax(unit, LOG_ERR, filename, line, k,
630 "Failed to parse boolean value%s: %s",
631 fatal ? "" : ", ignoring", rvalue);
632 return fatal ? -ENOEXEC : 0;
633 }
634
635 *b = !!k;
636 return 0;
637 }
638
639 int config_parse_tristate(
640 const char* unit,
641 const char *filename,
642 unsigned line,
643 const char *section,
644 unsigned section_line,
645 const char *lvalue,
646 int ltype,
647 const char *rvalue,
648 void *data,
649 void *userdata) {
650
651 int k, *t = data;
652
653 assert(filename);
654 assert(lvalue);
655 assert(rvalue);
656 assert(data);
657
658 /* A tristate is pretty much a boolean, except that it can
659 * also take the special value -1, indicating "uninitialized",
660 * much like NULL is for a pointer type. */
661
662 k = parse_boolean(rvalue);
663 if (k < 0) {
664 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
665 return 0;
666 }
667
668 *t = !!k;
669 return 0;
670 }
671
672 int config_parse_string(
673 const char *unit,
674 const char *filename,
675 unsigned line,
676 const char *section,
677 unsigned section_line,
678 const char *lvalue,
679 int ltype,
680 const char *rvalue,
681 void *data,
682 void *userdata) {
683
684 char **s = data;
685
686 assert(filename);
687 assert(lvalue);
688 assert(rvalue);
689 assert(data);
690
691 if (free_and_strdup(s, empty_to_null(rvalue)) < 0)
692 return log_oom();
693
694 return 0;
695 }
696
697 int config_parse_path(
698 const char *unit,
699 const char *filename,
700 unsigned line,
701 const char *section,
702 unsigned section_line,
703 const char *lvalue,
704 int ltype,
705 const char *rvalue,
706 void *data,
707 void *userdata) {
708
709 char **s = data, *n;
710 bool fatal = ltype;
711 int r;
712
713 assert(filename);
714 assert(lvalue);
715 assert(rvalue);
716 assert(data);
717
718 if (isempty(rvalue)) {
719 n = NULL;
720 goto finalize;
721 }
722
723 n = strdup(rvalue);
724 if (!n)
725 return log_oom();
726
727 r = path_simplify_and_warn(n, PATH_CHECK_ABSOLUTE | (fatal ? PATH_CHECK_FATAL : 0), unit, filename, line, lvalue);
728 if (r < 0)
729 return fatal ? -ENOEXEC : 0;
730
731 finalize:
732 free_and_replace(*s, n);
733
734 return 0;
735 }
736
737 int config_parse_strv(
738 const char *unit,
739 const char *filename,
740 unsigned line,
741 const char *section,
742 unsigned section_line,
743 const char *lvalue,
744 int ltype,
745 const char *rvalue,
746 void *data,
747 void *userdata) {
748
749 char ***sv = data;
750 int r;
751
752 assert(filename);
753 assert(lvalue);
754 assert(rvalue);
755 assert(data);
756
757 if (isempty(rvalue)) {
758 *sv = strv_free(*sv);
759 return 0;
760 }
761
762 for (;;) {
763 char *word = NULL;
764
765 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES|EXTRACT_RETAIN_ESCAPE);
766 if (r == 0)
767 break;
768 if (r == -ENOMEM)
769 return log_oom();
770 if (r < 0) {
771 log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
772 break;
773 }
774
775 r = strv_consume(sv, word);
776 if (r < 0)
777 return log_oom();
778 }
779
780 return 0;
781 }
782
783 int config_parse_warn_compat(
784 const char *unit,
785 const char *filename,
786 unsigned line,
787 const char *section,
788 unsigned section_line,
789 const char *lvalue,
790 int ltype,
791 const char *rvalue,
792 void *data,
793 void *userdata) {
794
795 Disabled reason = ltype;
796
797 switch(reason) {
798
799 case DISABLED_CONFIGURATION:
800 log_syntax(unit, LOG_DEBUG, filename, line, 0,
801 "Support for option %s= has been disabled at compile time and it is ignored", lvalue);
802 break;
803
804 case DISABLED_LEGACY:
805 log_syntax(unit, LOG_INFO, filename, line, 0,
806 "Support for option %s= has been removed and it is ignored", lvalue);
807 break;
808
809 case DISABLED_EXPERIMENTAL:
810 log_syntax(unit, LOG_INFO, filename, line, 0,
811 "Support for option %s= has not yet been enabled and it is ignored", lvalue);
812 break;
813 }
814
815 return 0;
816 }
817
818 int config_parse_log_facility(
819 const char *unit,
820 const char *filename,
821 unsigned line,
822 const char *section,
823 unsigned section_line,
824 const char *lvalue,
825 int ltype,
826 const char *rvalue,
827 void *data,
828 void *userdata) {
829
830 int *o = data, x;
831
832 assert(filename);
833 assert(lvalue);
834 assert(rvalue);
835 assert(data);
836
837 x = log_facility_unshifted_from_string(rvalue);
838 if (x < 0) {
839 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
840 return 0;
841 }
842
843 *o = (x << 3) | LOG_PRI(*o);
844
845 return 0;
846 }
847
848 int config_parse_log_level(
849 const char *unit,
850 const char *filename,
851 unsigned line,
852 const char *section,
853 unsigned section_line,
854 const char *lvalue,
855 int ltype,
856 const char *rvalue,
857 void *data,
858 void *userdata) {
859
860 int *o = data, x;
861
862 assert(filename);
863 assert(lvalue);
864 assert(rvalue);
865 assert(data);
866
867 x = log_level_from_string(rvalue);
868 if (x < 0) {
869 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
870 return 0;
871 }
872
873 if (*o < 0) /* if it wasn't initialized so far, assume zero facility */
874 *o = x;
875 else
876 *o = (*o & LOG_FACMASK) | x;
877
878 return 0;
879 }
880
881 int config_parse_signal(
882 const char *unit,
883 const char *filename,
884 unsigned line,
885 const char *section,
886 unsigned section_line,
887 const char *lvalue,
888 int ltype,
889 const char *rvalue,
890 void *data,
891 void *userdata) {
892
893 int *sig = data, r;
894
895 assert(filename);
896 assert(lvalue);
897 assert(rvalue);
898 assert(sig);
899
900 r = signal_from_string(rvalue);
901 if (r <= 0) {
902 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
903 return 0;
904 }
905
906 *sig = r;
907 return 0;
908 }
909
910 int config_parse_personality(
911 const char *unit,
912 const char *filename,
913 unsigned line,
914 const char *section,
915 unsigned section_line,
916 const char *lvalue,
917 int ltype,
918 const char *rvalue,
919 void *data,
920 void *userdata) {
921
922 unsigned long *personality = data, p;
923
924 assert(filename);
925 assert(lvalue);
926 assert(rvalue);
927 assert(personality);
928
929 if (isempty(rvalue))
930 p = PERSONALITY_INVALID;
931 else {
932 p = personality_from_string(rvalue);
933 if (p == PERSONALITY_INVALID) {
934 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
935 return 0;
936 }
937 }
938
939 *personality = p;
940 return 0;
941 }
942
943 int config_parse_ifname(
944 const char *unit,
945 const char *filename,
946 unsigned line,
947 const char *section,
948 unsigned section_line,
949 const char *lvalue,
950 int ltype,
951 const char *rvalue,
952 void *data,
953 void *userdata) {
954
955 char **s = data;
956 int r;
957
958 assert(filename);
959 assert(lvalue);
960 assert(rvalue);
961 assert(data);
962
963 if (isempty(rvalue)) {
964 *s = mfree(*s);
965 return 0;
966 }
967
968 if (!ifname_valid(rvalue)) {
969 log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
970 return 0;
971 }
972
973 r = free_and_strdup(s, rvalue);
974 if (r < 0)
975 return log_oom();
976
977 return 0;
978 }
979
980 int config_parse_ip_port(
981 const char *unit,
982 const char *filename,
983 unsigned line,
984 const char *section,
985 unsigned section_line,
986 const char *lvalue,
987 int ltype,
988 const char *rvalue,
989 void *data,
990 void *userdata) {
991
992 uint16_t *s = data;
993 uint16_t port;
994 int r;
995
996 assert(filename);
997 assert(lvalue);
998 assert(rvalue);
999 assert(data);
1000
1001 if (isempty(rvalue)) {
1002 *s = 0;
1003 return 0;
1004 }
1005
1006 r = parse_ip_port(rvalue, &port);
1007 if (r < 0) {
1008 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse port '%s'.", rvalue);
1009 return 0;
1010 }
1011
1012 *s = port;
1013
1014 return 0;
1015 }
1016
1017 int config_parse_join_controllers(
1018 const char *unit,
1019 const char *filename,
1020 unsigned line,
1021 const char *section,
1022 unsigned section_line,
1023 const char *lvalue,
1024 int ltype,
1025 const char *rvalue,
1026 void *data,
1027 void *userdata) {
1028
1029 char ****ret = data;
1030 const char *whole_rvalue = rvalue;
1031 unsigned n = 0;
1032 _cleanup_(strv_free_freep) char ***controllers = NULL;
1033
1034 assert(filename);
1035 assert(lvalue);
1036 assert(rvalue);
1037 assert(ret);
1038
1039 for (;;) {
1040 _cleanup_free_ char *word = NULL;
1041 char **l;
1042 int r;
1043
1044 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES);
1045 if (r < 0) {
1046 log_syntax(unit, LOG_ERR, filename, line, r, "Invalid value for %s: %s", lvalue, whole_rvalue);
1047 return r;
1048 }
1049 if (r == 0)
1050 break;
1051
1052 l = strv_split(word, ",");
1053 if (!l)
1054 return log_oom();
1055 strv_uniq(l);
1056
1057 if (strv_length(l) <= 1) {
1058 strv_free(l);
1059 continue;
1060 }
1061
1062 if (!controllers) {
1063 controllers = new(char**, 2);
1064 if (!controllers) {
1065 strv_free(l);
1066 return log_oom();
1067 }
1068
1069 controllers[0] = l;
1070 controllers[1] = NULL;
1071
1072 n = 1;
1073 } else {
1074 char ***a;
1075 char ***t;
1076
1077 t = new0(char**, n+2);
1078 if (!t) {
1079 strv_free(l);
1080 return log_oom();
1081 }
1082
1083 n = 0;
1084
1085 for (a = controllers; *a; a++)
1086 if (strv_overlap(*a, l)) {
1087 if (strv_extend_strv(&l, *a, false) < 0) {
1088 strv_free(l);
1089 strv_free_free(t);
1090 return log_oom();
1091 }
1092
1093 } else {
1094 char **c;
1095
1096 c = strv_copy(*a);
1097 if (!c) {
1098 strv_free(l);
1099 strv_free_free(t);
1100 return log_oom();
1101 }
1102
1103 t[n++] = c;
1104 }
1105
1106 t[n++] = strv_uniq(l);
1107
1108 strv_free_free(controllers);
1109 controllers = t;
1110 }
1111 }
1112 if (!isempty(rvalue))
1113 log_syntax(unit, LOG_ERR, filename, line, 0, "Trailing garbage, ignoring.");
1114
1115 /* As a special case, return a single empty strv, to override the default */
1116 if (!controllers) {
1117 controllers = new(char**, 2);
1118 if (!controllers)
1119 return log_oom();
1120 controllers[0] = strv_new(NULL, NULL);
1121 if (!controllers[0])
1122 return log_oom();
1123 controllers[1] = NULL;
1124 }
1125
1126 strv_free_free(*ret);
1127 *ret = TAKE_PTR(controllers);
1128
1129 return 0;
1130 }
1131
1132 int config_parse_mtu(
1133 const char *unit,
1134 const char *filename,
1135 unsigned line,
1136 const char *section,
1137 unsigned section_line,
1138 const char *lvalue,
1139 int ltype,
1140 const char *rvalue,
1141 void *data,
1142 void *userdata) {
1143
1144 uint32_t *mtu = data;
1145 int r;
1146
1147 assert(rvalue);
1148 assert(mtu);
1149
1150 r = parse_mtu(ltype, rvalue, mtu);
1151 if (r == -ERANGE) {
1152 log_syntax(unit, LOG_ERR, filename, line, r,
1153 "Maximum transfer unit (MTU) value out of range. Permitted range is %" PRIu32 "…%" PRIu32 ", ignoring: %s",
1154 (uint32_t) (ltype == AF_INET6 ? IPV6_MIN_MTU : IPV4_MIN_MTU), (uint32_t) UINT32_MAX,
1155 rvalue);
1156 return 0;
1157 }
1158 if (r < 0) {
1159 log_syntax(unit, LOG_ERR, filename, line, r,
1160 "Failed to parse MTU value '%s', ignoring: %m", rvalue);
1161 return 0;
1162 }
1163
1164 return 0;
1165 }
1166
1167 int config_parse_rlimit(
1168 const char *unit,
1169 const char *filename,
1170 unsigned line,
1171 const char *section,
1172 unsigned section_line,
1173 const char *lvalue,
1174 int ltype,
1175 const char *rvalue,
1176 void *data,
1177 void *userdata) {
1178
1179 struct rlimit **rl = data, d = {};
1180 int r;
1181
1182 assert(rvalue);
1183 assert(rl);
1184
1185 r = rlimit_parse(ltype, rvalue, &d);
1186 if (r == -EILSEQ) {
1187 log_syntax(unit, LOG_WARNING, filename, line, r, "Soft resource limit chosen higher than hard limit, ignoring: %s", rvalue);
1188 return 0;
1189 }
1190 if (r < 0) {
1191 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, ignoring: %s", rvalue);
1192 return 0;
1193 }
1194
1195 if (rl[ltype])
1196 *rl[ltype] = d;
1197 else {
1198 rl[ltype] = newdup(struct rlimit, &d, 1);
1199 if (!rl[ltype])
1200 return log_oom();
1201 }
1202
1203 return 0;
1204 }