Commit | Line | Data |
---|---|---|
07800601 IM |
1 | /* |
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 | ||
14 | static FILE *config_file; | |
15 | static const char *config_file_name; | |
16 | static int config_linenr; | |
17 | static int config_file_eof; | |
07800601 IM |
18 | |
19 | const char *config_exclusive_filename = NULL; | |
20 | ||
21 | static 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 | ||
47 | static char *parse_value(void) | |
48 | { | |
49 | static char value[1024]; | |
f37a291c IM |
50 | int quote = 0, comment = 0, space = 0; |
51 | size_t len = 0; | |
07800601 IM |
52 | |
53 | for (;;) { | |
54 | int c = get_next_char(); | |
f37a291c | 55 | |
07800601 IM |
56 | 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 | ||
113 | static inline int iskeychar(int c) | |
114 | { | |
115 | return isalnum(c) || c == '-'; | |
116 | } | |
117 | ||
118 | static 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 | ||
149 | static 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 (;;) { | |
83a0944f IM |
163 | int ch = get_next_char(); |
164 | ||
165 | if (ch == '\n') | |
07800601 | 166 | return -1; |
83a0944f | 167 | if (ch == '"') |
07800601 | 168 | break; |
83a0944f IM |
169 | if (ch == '\\') { |
170 | ch = get_next_char(); | |
171 | if (ch == '\n') | |
07800601 IM |
172 | return -1; |
173 | } | |
83a0944f | 174 | name[baselen++] = ch; |
07800601 IM |
175 | if (baselen > MAXNAME / 2) |
176 | return -1; | |
177 | } | |
178 | ||
179 | /* Final ']' */ | |
180 | if (get_next_char() != ']') | |
181 | return -1; | |
182 | return baselen; | |
183 | } | |
184 | ||
185 | static 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 | ||
205 | static 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 | ||
261 | static 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 | ||
280 | static 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 | ||
294 | int 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 | ||
307 | static 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 | ||
314 | int 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 | ||
322 | unsigned 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 | ||
330 | int 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 | ||
345 | int 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 | ||
351 | int 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 | ||
f37a291c | 359 | static int perf_default_core_config(const char *var __used, const char *value __used) |
07800601 IM |
360 | { |
361 | /* Add other config variables here and to Documentation/config.txt. */ | |
362 | return 0; | |
363 | } | |
364 | ||
f37a291c | 365 | int perf_default_config(const char *var, const char *value, void *dummy __used) |
07800601 IM |
366 | { |
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 | ||
374 | int 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 | ||
392 | const 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 | ||
400 | static 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 | ||
406 | int perf_config_system(void) | |
407 | { | |
408 | return !perf_env_bool("PERF_CONFIG_NOSYSTEM", 0); | |
409 | } | |
410 | ||
411 | int perf_config_global(void) | |
412 | { | |
413 | return !perf_env_bool("PERF_CONFIG_NOGLOBAL", 0); | |
414 | } | |
415 | ||
416 | int 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 | ||
458 | static 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 | ||
469 | static 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 | ||
f37a291c | 477 | static int store_aux(const char* key, const char* value, void *cb __used) |
07800601 | 478 | { |
f37a291c | 479 | int section_len; |
07800601 | 480 | const char *ep; |
07800601 IM |
481 | |
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 | } | |
83a0944f IM |
534 | default: |
535 | break; | |
07800601 IM |
536 | } |
537 | return 0; | |
538 | } | |
539 | ||
07800601 IM |
540 | static 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 | ||
f37a291c | 559 | success = (write_in_full(fd, sb.buf, sb.len) == (ssize_t)sb.len); |
07800601 IM |
560 | strbuf_release(&sb); |
561 | ||
562 | return success; | |
563 | } | |
564 | ||
565 | static 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 | ||
f37a291c | 607 | success = (write_in_full(fd, sb.buf, sb.len) == (ssize_t)sb.len); |
07800601 IM |
608 | strbuf_release(&sb); |
609 | ||
610 | return success; | |
611 | } | |
612 | ||
613 | static 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 | ||
619 | contline: | |
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; | |
83a0944f | 625 | default: break; |
07800601 IM |
626 | } |
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 | ||
640 | int 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 | */ | |
668 | int 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; | |
6f06ccbc | 673 | int ret = 0; |
07800601 IM |
674 | 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; | |
83a0944f | 749 | char *contents; |
f37a291c | 750 | ssize_t contents_sz, copy_begin, copy_end; |
83a0944f | 751 | int new_line = 0; |
07800601 IM |
752 | |
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 | ||
863 | out_free: | |
864 | free(config_filename); | |
865 | return ret; | |
866 | ||
867 | write_err_out: | |
868 | goto out_free; | |
869 | ||
870 | } | |
871 | ||
07800601 IM |
872 | /* |
873 | * Call this to report error for your variable that should not | |
874 | * get a boolean value (i.e. "[my] var" means "true"). | |
875 | */ | |
876 | int config_error_nonbool(const char *var) | |
877 | { | |
878 | return error("Missing value for '%s'", var); | |
879 | } |