blob: 8784649109ce88de709c08e30eeb06f25aaa04f4 [file] [log] [blame]
Ingo Molnar07800602009-04-20 15:00:56 +02001/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
6 *
7 */
8#include "util.h"
9#include "cache.h"
10#include "exec_cmd.h"
11
12#define MAXNAME (256)
13
14static FILE *config_file;
15static const char *config_file_name;
16static int config_linenr;
17static int config_file_eof;
Ingo Molnar07800602009-04-20 15:00:56 +020018
19const char *config_exclusive_filename = NULL;
20
21static int get_next_char(void)
22{
23 int c;
24 FILE *f;
25
26 c = '\n';
27 if ((f = config_file) != NULL) {
28 c = fgetc(f);
29 if (c == '\r') {
30 /* DOS like systems */
31 c = fgetc(f);
32 if (c != '\n') {
33 ungetc(c, f);
34 c = '\r';
35 }
36 }
37 if (c == '\n')
38 config_linenr++;
39 if (c == EOF) {
40 config_file_eof = 1;
41 c = '\n';
42 }
43 }
44 return c;
45}
46
47static char *parse_value(void)
48{
49 static char value[1024];
Ingo Molnarf37a2912009-07-01 12:37:06 +020050 int quote = 0, comment = 0, space = 0;
51 size_t len = 0;
Ingo Molnar07800602009-04-20 15:00:56 +020052
53 for (;;) {
54 int c = get_next_char();
Ingo Molnarf37a2912009-07-01 12:37:06 +020055
Ingo Molnar07800602009-04-20 15:00:56 +020056 if (len >= sizeof(value) - 1)
57 return NULL;
58 if (c == '\n') {
59 if (quote)
60 return NULL;
61 value[len] = 0;
62 return value;
63 }
64 if (comment)
65 continue;
66 if (isspace(c) && !quote) {
67 space = 1;
68 continue;
69 }
70 if (!quote) {
71 if (c == ';' || c == '#') {
72 comment = 1;
73 continue;
74 }
75 }
76 if (space) {
77 if (len)
78 value[len++] = ' ';
79 space = 0;
80 }
81 if (c == '\\') {
82 c = get_next_char();
83 switch (c) {
84 case '\n':
85 continue;
86 case 't':
87 c = '\t';
88 break;
89 case 'b':
90 c = '\b';
91 break;
92 case 'n':
93 c = '\n';
94 break;
95 /* Some characters escape as themselves */
96 case '\\': case '"':
97 break;
98 /* Reject unknown escape sequences */
99 default:
100 return NULL;
101 }
102 value[len++] = c;
103 continue;
104 }
105 if (c == '"') {
106 quote = 1-quote;
107 continue;
108 }
109 value[len++] = c;
110 }
111}
112
113static inline int iskeychar(int c)
114{
115 return isalnum(c) || c == '-';
116}
117
118static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
119{
120 int c;
121 char *value;
122
123 /* Get the full name */
124 for (;;) {
125 c = get_next_char();
126 if (config_file_eof)
127 break;
128 if (!iskeychar(c))
129 break;
130 name[len++] = tolower(c);
131 if (len >= MAXNAME)
132 return -1;
133 }
134 name[len] = 0;
135 while (c == ' ' || c == '\t')
136 c = get_next_char();
137
138 value = NULL;
139 if (c != '\n') {
140 if (c != '=')
141 return -1;
142 value = parse_value();
143 if (!value)
144 return -1;
145 }
146 return fn(name, value, data);
147}
148
149static int get_extended_base_var(char *name, int baselen, int c)
150{
151 do {
152 if (c == '\n')
153 return -1;
154 c = get_next_char();
155 } while (isspace(c));
156
157 /* We require the format to be '[base "extension"]' */
158 if (c != '"')
159 return -1;
160 name[baselen++] = '.';
161
162 for (;;) {
Ingo Molnar83a09442009-08-15 12:26:57 +0200163 int ch = get_next_char();
164
165 if (ch == '\n')
Ingo Molnar07800602009-04-20 15:00:56 +0200166 return -1;
Ingo Molnar83a09442009-08-15 12:26:57 +0200167 if (ch == '"')
Ingo Molnar07800602009-04-20 15:00:56 +0200168 break;
Ingo Molnar83a09442009-08-15 12:26:57 +0200169 if (ch == '\\') {
170 ch = get_next_char();
171 if (ch == '\n')
Ingo Molnar07800602009-04-20 15:00:56 +0200172 return -1;
173 }
Ingo Molnar83a09442009-08-15 12:26:57 +0200174 name[baselen++] = ch;
Ingo Molnar07800602009-04-20 15:00:56 +0200175 if (baselen > MAXNAME / 2)
176 return -1;
177 }
178
179 /* Final ']' */
180 if (get_next_char() != ']')
181 return -1;
182 return baselen;
183}
184
185static int get_base_var(char *name)
186{
187 int baselen = 0;
188
189 for (;;) {
190 int c = get_next_char();
191 if (config_file_eof)
192 return -1;
193 if (c == ']')
194 return baselen;
195 if (isspace(c))
196 return get_extended_base_var(name, baselen, c);
197 if (!iskeychar(c) && c != '.')
198 return -1;
199 if (baselen > MAXNAME / 2)
200 return -1;
201 name[baselen++] = tolower(c);
202 }
203}
204
205static int perf_parse_file(config_fn_t fn, void *data)
206{
207 int comment = 0;
208 int baselen = 0;
209 static char var[MAXNAME];
210
211 /* U+FEFF Byte Order Mark in UTF8 */
212 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
213 const unsigned char *bomptr = utf8_bom;
214
215 for (;;) {
216 int c = get_next_char();
217 if (bomptr && *bomptr) {
218 /* We are at the file beginning; skip UTF8-encoded BOM
219 * if present. Sane editors won't put this in on their
220 * own, but e.g. Windows Notepad will do it happily. */
221 if ((unsigned char) c == *bomptr) {
222 bomptr++;
223 continue;
224 } else {
225 /* Do not tolerate partial BOM. */
226 if (bomptr != utf8_bom)
227 break;
228 /* No BOM at file beginning. Cool. */
229 bomptr = NULL;
230 }
231 }
232 if (c == '\n') {
233 if (config_file_eof)
234 return 0;
235 comment = 0;
236 continue;
237 }
238 if (comment || isspace(c))
239 continue;
240 if (c == '#' || c == ';') {
241 comment = 1;
242 continue;
243 }
244 if (c == '[') {
245 baselen = get_base_var(var);
246 if (baselen <= 0)
247 break;
248 var[baselen++] = '.';
249 var[baselen] = 0;
250 continue;
251 }
252 if (!isalpha(c))
253 break;
254 var[baselen] = tolower(c);
255 if (get_value(fn, data, var, baselen+1) < 0)
256 break;
257 }
258 die("bad config file line %d in %s", config_linenr, config_file_name);
259}
260
261static int parse_unit_factor(const char *end, unsigned long *val)
262{
263 if (!*end)
264 return 1;
265 else if (!strcasecmp(end, "k")) {
266 *val *= 1024;
267 return 1;
268 }
269 else if (!strcasecmp(end, "m")) {
270 *val *= 1024 * 1024;
271 return 1;
272 }
273 else if (!strcasecmp(end, "g")) {
274 *val *= 1024 * 1024 * 1024;
275 return 1;
276 }
277 return 0;
278}
279
280static int perf_parse_long(const char *value, long *ret)
281{
282 if (value && *value) {
283 char *end;
284 long val = strtol(value, &end, 0);
285 unsigned long factor = 1;
286 if (!parse_unit_factor(end, &factor))
287 return 0;
288 *ret = val * factor;
289 return 1;
290 }
291 return 0;
292}
293
294int perf_parse_ulong(const char *value, unsigned long *ret)
295{
296 if (value && *value) {
297 char *end;
298 unsigned long val = strtoul(value, &end, 0);
299 if (!parse_unit_factor(end, &val))
300 return 0;
301 *ret = val;
302 return 1;
303 }
304 return 0;
305}
306
307static void die_bad_config(const char *name)
308{
309 if (config_file_name)
310 die("bad config value for '%s' in %s", name, config_file_name);
311 die("bad config value for '%s'", name);
312}
313
314int perf_config_int(const char *name, const char *value)
315{
316 long ret = 0;
317 if (!perf_parse_long(value, &ret))
318 die_bad_config(name);
319 return ret;
320}
321
322unsigned long perf_config_ulong(const char *name, const char *value)
323{
324 unsigned long ret;
325 if (!perf_parse_ulong(value, &ret))
326 die_bad_config(name);
327 return ret;
328}
329
330int perf_config_bool_or_int(const char *name, const char *value, int *is_bool)
331{
332 *is_bool = 1;
333 if (!value)
334 return 1;
335 if (!*value)
336 return 0;
337 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes") || !strcasecmp(value, "on"))
338 return 1;
339 if (!strcasecmp(value, "false") || !strcasecmp(value, "no") || !strcasecmp(value, "off"))
340 return 0;
341 *is_bool = 0;
342 return perf_config_int(name, value);
343}
344
345int perf_config_bool(const char *name, const char *value)
346{
347 int discard;
348 return !!perf_config_bool_or_int(name, value, &discard);
349}
350
351int perf_config_string(const char **dest, const char *var, const char *value)
352{
353 if (!value)
354 return config_error_nonbool(var);
355 *dest = strdup(value);
356 return 0;
357}
358
Ingo Molnarf37a2912009-07-01 12:37:06 +0200359static int perf_default_core_config(const char *var __used, const char *value __used)
Ingo Molnar07800602009-04-20 15:00:56 +0200360{
361 /* Add other config variables here and to Documentation/config.txt. */
362 return 0;
363}
364
Ingo Molnarf37a2912009-07-01 12:37:06 +0200365int perf_default_config(const char *var, const char *value, void *dummy __used)
Ingo Molnar07800602009-04-20 15:00:56 +0200366{
367 if (!prefixcmp(var, "core."))
368 return perf_default_core_config(var, value);
369
370 /* Add other config variables here and to Documentation/config.txt. */
371 return 0;
372}
373
374int perf_config_from_file(config_fn_t fn, const char *filename, void *data)
375{
376 int ret;
377 FILE *f = fopen(filename, "r");
378
379 ret = -1;
380 if (f) {
381 config_file = f;
382 config_file_name = filename;
383 config_linenr = 1;
384 config_file_eof = 0;
385 ret = perf_parse_file(fn, data);
386 fclose(f);
387 config_file_name = NULL;
388 }
389 return ret;
390}
391
392const char *perf_etc_perfconfig(void)
393{
394 static const char *system_wide;
395 if (!system_wide)
396 system_wide = system_path(ETC_PERFCONFIG);
397 return system_wide;
398}
399
400static int perf_env_bool(const char *k, int def)
401{
402 const char *v = getenv(k);
403 return v ? perf_config_bool(k, v) : def;
404}
405
406int perf_config_system(void)
407{
408 return !perf_env_bool("PERF_CONFIG_NOSYSTEM", 0);
409}
410
411int perf_config_global(void)
412{
413 return !perf_env_bool("PERF_CONFIG_NOGLOBAL", 0);
414}
415
416int perf_config(config_fn_t fn, void *data)
417{
418 int ret = 0, found = 0;
419 char *repo_config = NULL;
420 const char *home = NULL;
421
422 /* Setting $PERF_CONFIG makes perf read _only_ the given config file. */
423 if (config_exclusive_filename)
424 return perf_config_from_file(fn, config_exclusive_filename, data);
425 if (perf_config_system() && !access(perf_etc_perfconfig(), R_OK)) {
426 ret += perf_config_from_file(fn, perf_etc_perfconfig(),
427 data);
428 found += 1;
429 }
430
431 home = getenv("HOME");
432 if (perf_config_global() && home) {
433 char *user_config = strdup(mkpath("%s/.perfconfig", home));
434 if (!access(user_config, R_OK)) {
435 ret += perf_config_from_file(fn, user_config, data);
436 found += 1;
437 }
438 free(user_config);
439 }
440
441 repo_config = perf_pathdup("config");
442 if (!access(repo_config, R_OK)) {
443 ret += perf_config_from_file(fn, repo_config, data);
444 found += 1;
445 }
446 free(repo_config);
447 if (found == 0)
448 return -1;
449 return ret;
450}
451
452/*
453 * Find all the stuff for perf_config_set() below.
454 */
455
456#define MAX_MATCHES 512
457
458static struct {
459 int baselen;
460 char* key;
461 int do_not_match;
462 regex_t* value_regex;
463 int multi_replace;
464 size_t offset[MAX_MATCHES];
465 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
466 int seen;
467} store;
468
469static int matches(const char* key, const char* value)
470{
471 return !strcmp(key, store.key) &&
472 (store.value_regex == NULL ||
473 (store.do_not_match ^
474 !regexec(store.value_regex, value, 0, NULL, 0)));
475}
476
Ingo Molnarf37a2912009-07-01 12:37:06 +0200477static int store_aux(const char* key, const char* value, void *cb __used)
Ingo Molnar07800602009-04-20 15:00:56 +0200478{
Ingo Molnarf37a2912009-07-01 12:37:06 +0200479 int section_len;
Ingo Molnar07800602009-04-20 15:00:56 +0200480 const char *ep;
Ingo Molnar07800602009-04-20 15:00:56 +0200481
482 switch (store.state) {
483 case KEY_SEEN:
484 if (matches(key, value)) {
485 if (store.seen == 1 && store.multi_replace == 0) {
486 warning("%s has multiple values", key);
487 } else if (store.seen >= MAX_MATCHES) {
488 error("too many matches for %s", key);
489 return 1;
490 }
491
492 store.offset[store.seen] = ftell(config_file);
493 store.seen++;
494 }
495 break;
496 case SECTION_SEEN:
497 /*
498 * What we are looking for is in store.key (both
499 * section and var), and its section part is baselen
500 * long. We found key (again, both section and var).
501 * We would want to know if this key is in the same
502 * section as what we are looking for. We already
503 * know we are in the same section as what should
504 * hold store.key.
505 */
506 ep = strrchr(key, '.');
507 section_len = ep - key;
508
509 if ((section_len != store.baselen) ||
510 memcmp(key, store.key, section_len+1)) {
511 store.state = SECTION_END_SEEN;
512 break;
513 }
514
515 /*
516 * Do not increment matches: this is no match, but we
517 * just made sure we are in the desired section.
518 */
519 store.offset[store.seen] = ftell(config_file);
520 /* fallthru */
521 case SECTION_END_SEEN:
522 case START:
523 if (matches(key, value)) {
524 store.offset[store.seen] = ftell(config_file);
525 store.state = KEY_SEEN;
526 store.seen++;
527 } else {
528 if (strrchr(key, '.') - key == store.baselen &&
529 !strncmp(key, store.key, store.baselen)) {
530 store.state = SECTION_SEEN;
531 store.offset[store.seen] = ftell(config_file);
532 }
533 }
Ingo Molnar83a09442009-08-15 12:26:57 +0200534 default:
535 break;
Ingo Molnar07800602009-04-20 15:00:56 +0200536 }
537 return 0;
538}
539
Ingo Molnar07800602009-04-20 15:00:56 +0200540static int store_write_section(int fd, const char* key)
541{
542 const char *dot;
543 int i, success;
544 struct strbuf sb = STRBUF_INIT;
545
546 dot = memchr(key, '.', store.baselen);
547 if (dot) {
548 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
549 for (i = dot - key + 1; i < store.baselen; i++) {
550 if (key[i] == '"' || key[i] == '\\')
551 strbuf_addch(&sb, '\\');
552 strbuf_addch(&sb, key[i]);
553 }
554 strbuf_addstr(&sb, "\"]\n");
555 } else {
556 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
557 }
558
Ingo Molnarf37a2912009-07-01 12:37:06 +0200559 success = (write_in_full(fd, sb.buf, sb.len) == (ssize_t)sb.len);
Ingo Molnar07800602009-04-20 15:00:56 +0200560 strbuf_release(&sb);
561
562 return success;
563}
564
565static int store_write_pair(int fd, const char* key, const char* value)
566{
567 int i, success;
568 int length = strlen(key + store.baselen + 1);
569 const char *quote = "";
570 struct strbuf sb = STRBUF_INIT;
571
572 /*
573 * Check to see if the value needs to be surrounded with a dq pair.
574 * Note that problematic characters are always backslash-quoted; this
575 * check is about not losing leading or trailing SP and strings that
576 * follow beginning-of-comment characters (i.e. ';' and '#') by the
577 * configuration parser.
578 */
579 if (value[0] == ' ')
580 quote = "\"";
581 for (i = 0; value[i]; i++)
582 if (value[i] == ';' || value[i] == '#')
583 quote = "\"";
584 if (i && value[i - 1] == ' ')
585 quote = "\"";
586
587 strbuf_addf(&sb, "\t%.*s = %s",
588 length, key + store.baselen + 1, quote);
589
590 for (i = 0; value[i]; i++)
591 switch (value[i]) {
592 case '\n':
593 strbuf_addstr(&sb, "\\n");
594 break;
595 case '\t':
596 strbuf_addstr(&sb, "\\t");
597 break;
598 case '"':
599 case '\\':
600 strbuf_addch(&sb, '\\');
601 default:
602 strbuf_addch(&sb, value[i]);
603 break;
604 }
605 strbuf_addf(&sb, "%s\n", quote);
606
Ingo Molnarf37a2912009-07-01 12:37:06 +0200607 success = (write_in_full(fd, sb.buf, sb.len) == (ssize_t)sb.len);
Ingo Molnar07800602009-04-20 15:00:56 +0200608 strbuf_release(&sb);
609
610 return success;
611}
612
613static ssize_t find_beginning_of_line(const char* contents, size_t size,
614 size_t offset_, int* found_bracket)
615{
616 size_t equal_offset = size, bracket_offset = size;
617 ssize_t offset;
618
619contline:
620 for (offset = offset_-2; offset > 0
621 && contents[offset] != '\n'; offset--)
622 switch (contents[offset]) {
623 case '=': equal_offset = offset; break;
624 case ']': bracket_offset = offset; break;
Ingo Molnar83a09442009-08-15 12:26:57 +0200625 default: break;
Ingo Molnar07800602009-04-20 15:00:56 +0200626 }
627 if (offset > 0 && contents[offset-1] == '\\') {
628 offset_ = offset;
629 goto contline;
630 }
631 if (bracket_offset < equal_offset) {
632 *found_bracket = 1;
633 offset = bracket_offset+1;
634 } else
635 offset++;
636
637 return offset;
638}
639
640int perf_config_set(const char* key, const char* value)
641{
642 return perf_config_set_multivar(key, value, NULL, 0);
643}
644
645/*
646 * If value==NULL, unset in (remove from) config,
647 * if value_regex!=NULL, disregard key/value pairs where value does not match.
648 * if multi_replace==0, nothing, or only one matching key/value is replaced,
649 * else all matching key/values (regardless how many) are removed,
650 * before the new pair is written.
651 *
652 * Returns 0 on success.
653 *
654 * This function does this:
655 *
656 * - it locks the config file by creating ".perf/config.lock"
657 *
658 * - it then parses the config using store_aux() as validator to find
659 * the position on the key/value pair to replace. If it is to be unset,
660 * it must be found exactly once.
661 *
662 * - the config file is mmap()ed and the part before the match (if any) is
663 * written to the lock file, then the changed part and the rest.
664 *
665 * - the config file is removed and the lock file rename()d to it.
666 *
667 */
668int perf_config_set_multivar(const char* key, const char* value,
669 const char* value_regex, int multi_replace)
670{
671 int i, dot;
672 int fd = -1, in_fd;
Ingo Molnar6f06ccb2009-04-20 15:22:22 +0200673 int ret = 0;
Ingo Molnar07800602009-04-20 15:00:56 +0200674 char* config_filename;
675 const char* last_dot = strrchr(key, '.');
676
677 if (config_exclusive_filename)
678 config_filename = strdup(config_exclusive_filename);
679 else
680 config_filename = perf_pathdup("config");
681
682 /*
683 * Since "key" actually contains the section name and the real
684 * key name separated by a dot, we have to know where the dot is.
685 */
686
687 if (last_dot == NULL) {
688 error("key does not contain a section: %s", key);
689 ret = 2;
690 goto out_free;
691 }
692 store.baselen = last_dot - key;
693
694 store.multi_replace = multi_replace;
695
696 /*
697 * Validate the key and while at it, lower case it for matching.
698 */
699 store.key = malloc(strlen(key) + 1);
700 dot = 0;
701 for (i = 0; key[i]; i++) {
702 unsigned char c = key[i];
703 if (c == '.')
704 dot = 1;
705 /* Leave the extended basename untouched.. */
706 if (!dot || i > store.baselen) {
707 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
708 error("invalid key: %s", key);
709 free(store.key);
710 ret = 1;
711 goto out_free;
712 }
713 c = tolower(c);
714 } else if (c == '\n') {
715 error("invalid key (newline): %s", key);
716 free(store.key);
717 ret = 1;
718 goto out_free;
719 }
720 store.key[i] = c;
721 }
722 store.key[i] = 0;
723
724 /*
725 * If .perf/config does not exist yet, write a minimal version.
726 */
727 in_fd = open(config_filename, O_RDONLY);
728 if ( in_fd < 0 ) {
729 free(store.key);
730
731 if ( ENOENT != errno ) {
732 error("opening %s: %s", config_filename,
733 strerror(errno));
734 ret = 3; /* same as "invalid config file" */
735 goto out_free;
736 }
737 /* if nothing to unset, error out */
738 if (value == NULL) {
739 ret = 5;
740 goto out_free;
741 }
742
743 store.key = (char*)key;
744 if (!store_write_section(fd, key) ||
745 !store_write_pair(fd, key, value))
746 goto write_err_out;
747 } else {
748 struct stat st;
Ingo Molnar83a09442009-08-15 12:26:57 +0200749 char *contents;
Ingo Molnarf37a2912009-07-01 12:37:06 +0200750 ssize_t contents_sz, copy_begin, copy_end;
Ingo Molnar83a09442009-08-15 12:26:57 +0200751 int new_line = 0;
Ingo Molnar07800602009-04-20 15:00:56 +0200752
753 if (value_regex == NULL)
754 store.value_regex = NULL;
755 else {
756 if (value_regex[0] == '!') {
757 store.do_not_match = 1;
758 value_regex++;
759 } else
760 store.do_not_match = 0;
761
762 store.value_regex = (regex_t*)malloc(sizeof(regex_t));
763 if (regcomp(store.value_regex, value_regex,
764 REG_EXTENDED)) {
765 error("invalid pattern: %s", value_regex);
766 free(store.value_regex);
767 ret = 6;
768 goto out_free;
769 }
770 }
771
772 store.offset[0] = 0;
773 store.state = START;
774 store.seen = 0;
775
776 /*
777 * After this, store.offset will contain the *end* offset
778 * of the last match, or remain at 0 if no match was found.
779 * As a side effect, we make sure to transform only a valid
780 * existing config file.
781 */
782 if (perf_config_from_file(store_aux, config_filename, NULL)) {
783 error("invalid config file %s", config_filename);
784 free(store.key);
785 if (store.value_regex != NULL) {
786 regfree(store.value_regex);
787 free(store.value_regex);
788 }
789 ret = 3;
790 goto out_free;
791 }
792
793 free(store.key);
794 if (store.value_regex != NULL) {
795 regfree(store.value_regex);
796 free(store.value_regex);
797 }
798
799 /* if nothing to unset, or too many matches, error out */
800 if ((store.seen == 0 && value == NULL) ||
801 (store.seen > 1 && multi_replace == 0)) {
802 ret = 5;
803 goto out_free;
804 }
805
806 fstat(in_fd, &st);
807 contents_sz = xsize_t(st.st_size);
808 contents = mmap(NULL, contents_sz, PROT_READ,
809 MAP_PRIVATE, in_fd, 0);
810 close(in_fd);
811
812 if (store.seen == 0)
813 store.seen = 1;
814
815 for (i = 0, copy_begin = 0; i < store.seen; i++) {
816 if (store.offset[i] == 0) {
817 store.offset[i] = copy_end = contents_sz;
818 } else if (store.state != KEY_SEEN) {
819 copy_end = store.offset[i];
820 } else
821 copy_end = find_beginning_of_line(
822 contents, contents_sz,
823 store.offset[i]-2, &new_line);
824
825 if (copy_end > 0 && contents[copy_end-1] != '\n')
826 new_line = 1;
827
828 /* write the first part of the config */
829 if (copy_end > copy_begin) {
830 if (write_in_full(fd, contents + copy_begin,
831 copy_end - copy_begin) <
832 copy_end - copy_begin)
833 goto write_err_out;
834 if (new_line &&
835 write_in_full(fd, "\n", 1) != 1)
836 goto write_err_out;
837 }
838 copy_begin = store.offset[i];
839 }
840
841 /* write the pair (value == NULL means unset) */
842 if (value != NULL) {
843 if (store.state == START) {
844 if (!store_write_section(fd, key))
845 goto write_err_out;
846 }
847 if (!store_write_pair(fd, key, value))
848 goto write_err_out;
849 }
850
851 /* write the rest of the config */
852 if (copy_begin < contents_sz)
853 if (write_in_full(fd, contents + copy_begin,
854 contents_sz - copy_begin) <
855 contents_sz - copy_begin)
856 goto write_err_out;
857
858 munmap(contents, contents_sz);
859 }
860
861 ret = 0;
862
863out_free:
864 free(config_filename);
865 return ret;
866
867write_err_out:
868 goto out_free;
869
870}
871
Ingo Molnar07800602009-04-20 15:00:56 +0200872/*
873 * Call this to report error for your variable that should not
874 * get a boolean value (i.e. "[my] var" means "true").
875 */
876int config_error_nonbool(const char *var)
877{
878 return error("Missing value for '%s'", var);
879}