2 This file is part of systemd.
4 Copyright 2010 Lennart Poettering
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.
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.
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/>.
26 #include <sys/types.h>
28 #include "alloc-util.h"
29 #include "conf-files.h"
30 #include "conf-parser.h"
31 #include "extract-word.h"
36 #include "parse-util.h"
37 #include "path-util.h"
38 #include "process-util.h"
39 #include "signal-util.h"
40 #include "string-util.h"
42 #include "syslog-util.h"
43 #include "time-util.h"
46 int config_item_table_lookup(
50 ConfigParserCallback
*func
,
55 const ConfigTableItem
*t
;
63 for (t
= table
; t
->lvalue
; t
++) {
65 if (!streq(lvalue
, t
->lvalue
))
68 if (!streq_ptr(section
, t
->section
))
80 int config_item_perf_lookup(
84 ConfigParserCallback
*func
,
89 ConfigPerfItemLookup lookup
= (ConfigPerfItemLookup
) table
;
90 const ConfigPerfItem
*p
;
99 p
= lookup(lvalue
, strlen(lvalue
));
103 key
= strjoin(section
, ".", lvalue
, NULL
);
107 p
= lookup(key
, strlen(key
));
116 *data
= (uint8_t*) userdata
+ p
->offset
;
120 /* Run the user supplied parser for an assignment */
121 static int next_assignment(const char *unit
,
122 const char *filename
,
124 ConfigItemLookup lookup
,
127 unsigned section_line
,
133 ConfigParserCallback func
= NULL
;
144 r
= lookup(table
, section
, lvalue
, &func
, <ype
, &data
, userdata
);
150 return func(unit
, filename
, line
, section
, section_line
,
151 lvalue
, ltype
, rvalue
, data
, userdata
);
156 /* Warn about unknown non-extension fields. */
157 if (!relaxed
&& !startswith(lvalue
, "X-"))
158 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0, "Unknown lvalue '%s' in section '%s'", lvalue
, section
);
163 /* Parse a variable assignment line */
164 static int parse_line(const char* unit
,
165 const char *filename
,
167 const char *sections
,
168 ConfigItemLookup lookup
,
173 unsigned *section_line
,
174 bool *section_ignored
,
190 if (strchr(COMMENTS
"\n", *l
))
193 if (startswith(l
, ".include ")) {
194 _cleanup_free_
char *fn
= NULL
;
196 /* .includes are a bad idea, we only support them here
197 * for historical reasons. They create cyclic include
198 * problems and make it difficult to detect
199 * configuration file changes with an easy
200 * stat(). Better approaches, such as .d/ drop-in
203 * Support for them should be eventually removed. */
205 if (!allow_include
) {
206 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, ".include not allowed here. Ignoring.");
210 fn
= file_in_same_dir(filename
, strstrip(l
+9));
214 return config_parse(unit
, fn
, NULL
, sections
, lookup
, table
, relaxed
, false, false, userdata
);
225 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Invalid section header '%s'", l
);
229 n
= strndup(l
+1, k
-2);
233 if (sections
&& !nulstr_contains(sections
, n
)) {
235 if (!relaxed
&& !startswith(n
, "X-"))
236 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0, "Unknown section '%s'. Ignoring.", n
);
239 *section
= mfree(*section
);
241 *section_ignored
= true;
245 *section_line
= line
;
246 *section_ignored
= false;
252 if (sections
&& !*section
) {
254 if (!relaxed
&& !*section_ignored
)
255 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0, "Assignment outside of section. Ignoring.");
262 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0, "Missing '='.");
269 return next_assignment(unit
,
282 /* Go through the file and parse each line */
283 int config_parse(const char *unit
,
284 const char *filename
,
286 const char *sections
,
287 ConfigItemLookup lookup
,
294 _cleanup_free_
char *section
= NULL
, *continuation
= NULL
;
295 _cleanup_fclose_
FILE *ours
= NULL
;
296 unsigned line
= 0, section_line
= 0;
297 bool section_ignored
= false, allow_bom
= true;
304 f
= ours
= fopen(filename
, "re");
306 /* Only log on request, except for ENOENT,
307 * since we return 0 to the caller. */
308 if (warn
|| errno
== ENOENT
)
309 log_full(errno
== ENOENT
? LOG_DEBUG
: LOG_ERR
,
310 "Failed to open configuration file '%s': %m", filename
);
311 return errno
== ENOENT
? 0 : -errno
;
315 fd_warn_permissions(filename
, fileno(f
));
318 char buf
[LINE_MAX
], *l
, *p
, *c
= NULL
, *e
;
319 bool escaped
= false;
321 if (!fgets(buf
, sizeof buf
, f
)) {
325 log_error_errno(errno
, "Failed to read configuration file '%s': %m", filename
);
330 if (allow_bom
&& startswith(l
, UTF8_BYTE_ORDER_MARK
))
331 l
+= strlen(UTF8_BYTE_ORDER_MARK
);
337 c
= strappend(continuation
, l
);
344 continuation
= mfree(continuation
);
349 for (e
= p
; *e
; e
++) {
362 continuation
= strdup(l
);
390 log_warning_errno(r
, "Failed to parse file '%s': %m",
399 /* Parse each config file in the specified directories. */
400 int config_parse_many(const char *conf_file
,
401 const char *conf_file_dirs
,
402 const char *sections
,
403 ConfigItemLookup lookup
,
407 _cleanup_strv_free_
char **files
= NULL
;
411 r
= conf_files_list_nulstr(&files
, ".conf", NULL
, conf_file_dirs
);
416 r
= config_parse(NULL
, conf_file
, NULL
, sections
, lookup
, table
, relaxed
, false, true, userdata
);
421 STRV_FOREACH(fn
, files
) {
422 r
= config_parse(NULL
, *fn
, NULL
, sections
, lookup
, table
, relaxed
, false, true, userdata
);
430 #define DEFINE_PARSER(type, vartype, conv_func) \
431 int config_parse_##type( \
433 const char *filename, \
435 const char *section, \
436 unsigned section_line, \
437 const char *lvalue, \
439 const char *rvalue, \
451 r = conv_func(rvalue, i); \
453 log_syntax(unit, LOG_ERR, filename, line, r, \
454 "Failed to parse %s value, ignoring: %s", \
459 struct __useless_struct_to_allow_trailing_semicolon__
461 DEFINE_PARSER(int, int, safe_atoi
);
462 DEFINE_PARSER(long, long, safe_atoli
);
463 DEFINE_PARSER(uint32
, uint32_t, safe_atou32
);
464 DEFINE_PARSER(uint64
, uint64_t, safe_atou64
);
465 DEFINE_PARSER(unsigned, unsigned, safe_atou
);
466 DEFINE_PARSER(double, double, safe_atod
);
467 DEFINE_PARSER(nsec
, nsec_t
, parse_nsec
);
468 DEFINE_PARSER(sec
, usec_t
, parse_sec
);
469 DEFINE_PARSER(mode
, mode_t
, parse_mode
);
471 int config_parse_iec_size(const char* unit
,
472 const char *filename
,
475 unsigned section_line
,
491 r
= parse_size(rvalue
, 1024, &v
);
492 if (r
< 0 || (uint64_t) (size_t) v
!= v
) {
493 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse size value, ignoring: %s", rvalue
);
501 int config_parse_si_size(const char* unit
,
502 const char *filename
,
505 unsigned section_line
,
521 r
= parse_size(rvalue
, 1000, &v
);
522 if (r
< 0 || (uint64_t) (size_t) v
!= v
) {
523 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse size value, ignoring: %s", rvalue
);
531 int config_parse_iec_uint64(const char* unit
,
532 const char *filename
,
535 unsigned section_line
,
542 uint64_t *bytes
= data
;
550 r
= parse_size(rvalue
, 1024, bytes
);
552 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse size value, ignoring: %s", rvalue
);
557 int config_parse_bool(const char* unit
,
558 const char *filename
,
561 unsigned section_line
,
576 k
= parse_boolean(rvalue
);
578 log_syntax(unit
, LOG_ERR
, filename
, line
, k
, "Failed to parse boolean value, ignoring: %s", rvalue
);
586 int config_parse_tristate(
588 const char *filename
,
591 unsigned section_line
,
605 /* A tristate is pretty much a boolean, except that it can
606 * also take the special value -1, indicating "uninitialized",
607 * much like NULL is for a pointer type. */
609 k
= parse_boolean(rvalue
);
611 log_syntax(unit
, LOG_ERR
, filename
, line
, k
, "Failed to parse boolean value, ignoring: %s", rvalue
);
619 int config_parse_string(
621 const char *filename
,
624 unsigned section_line
,
638 if (!utf8_is_valid(rvalue
)) {
639 log_syntax_invalid_utf8(unit
, LOG_ERR
, filename
, line
, rvalue
);
657 int config_parse_path(
659 const char *filename
,
662 unsigned section_line
,
676 if (!utf8_is_valid(rvalue
)) {
677 log_syntax_invalid_utf8(unit
, LOG_ERR
, filename
, line
, rvalue
);
681 if (!path_is_absolute(rvalue
)) {
682 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Not an absolute path, ignoring: %s", rvalue
);
690 path_kill_slashes(n
);
698 int config_parse_strv(const char *unit
,
699 const char *filename
,
702 unsigned section_line
,
716 if (isempty(rvalue
)) {
719 /* Empty assignment resets the list. As a special rule
720 * we actually fill in a real empty array here rather
721 * than NULL, since some code wants to know if
722 * something was set at all... */
723 empty
= strv_new(NULL
, NULL
);
735 r
= extract_first_word(&rvalue
, &word
, WHITESPACE
, EXTRACT_QUOTES
|EXTRACT_RETAIN_ESCAPE
);
741 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Invalid syntax, ignoring: %s", rvalue
);
745 if (!utf8_is_valid(word
)) {
746 log_syntax_invalid_utf8(unit
, LOG_ERR
, filename
, line
, rvalue
);
750 r
= strv_consume(sv
, word
);
758 int config_parse_log_facility(
760 const char *filename
,
763 unsigned section_line
,
778 x
= log_facility_unshifted_from_string(rvalue
);
780 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Failed to parse log facility, ignoring: %s", rvalue
);
784 *o
= (x
<< 3) | LOG_PRI(*o
);
789 int config_parse_log_level(
791 const char *filename
,
794 unsigned section_line
,
809 x
= log_level_from_string(rvalue
);
811 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Failed to parse log level, ignoring: %s", rvalue
);
815 *o
= (*o
& LOG_FACMASK
) | x
;
819 int config_parse_signal(
821 const char *filename
,
824 unsigned section_line
,
838 r
= signal_from_string_try_harder(rvalue
);
840 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Failed to parse signal name, ignoring: %s", rvalue
);
848 int config_parse_personality(
850 const char *filename
,
853 unsigned section_line
,
860 unsigned long *personality
= data
, p
;
867 p
= personality_from_string(rvalue
);
868 if (p
== PERSONALITY_INVALID
) {
869 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Failed to parse personality, ignoring: %s", rvalue
);