Commit | Line | Data |
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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 | ||
45de34bb SE |
14 | #define DEBUG_CACHE_DIR ".debug" |
15 | ||
16 | ||
17 | char buildid_dir[MAXPATHLEN]; /* root dir for buildid, binary cache */ | |
18 | ||
07800601 IM |
19 | static FILE *config_file; |
20 | static const char *config_file_name; | |
21 | static int config_linenr; | |
22 | static int config_file_eof; | |
07800601 | 23 | |
a41794cd | 24 | static const char *config_exclusive_filename; |
07800601 IM |
25 | |
26 | static int get_next_char(void) | |
27 | { | |
28 | int c; | |
29 | FILE *f; | |
30 | ||
31 | c = '\n'; | |
32 | if ((f = config_file) != NULL) { | |
33 | c = fgetc(f); | |
34 | if (c == '\r') { | |
35 | /* DOS like systems */ | |
36 | c = fgetc(f); | |
37 | if (c != '\n') { | |
38 | ungetc(c, f); | |
39 | c = '\r'; | |
40 | } | |
41 | } | |
42 | if (c == '\n') | |
43 | config_linenr++; | |
44 | if (c == EOF) { | |
45 | config_file_eof = 1; | |
46 | c = '\n'; | |
47 | } | |
48 | } | |
49 | return c; | |
50 | } | |
51 | ||
52 | static char *parse_value(void) | |
53 | { | |
54 | static char value[1024]; | |
f37a291c IM |
55 | int quote = 0, comment = 0, space = 0; |
56 | size_t len = 0; | |
07800601 IM |
57 | |
58 | for (;;) { | |
59 | int c = get_next_char(); | |
f37a291c | 60 | |
07800601 IM |
61 | if (len >= sizeof(value) - 1) |
62 | return NULL; | |
63 | if (c == '\n') { | |
64 | if (quote) | |
65 | return NULL; | |
66 | value[len] = 0; | |
67 | return value; | |
68 | } | |
69 | if (comment) | |
70 | continue; | |
71 | if (isspace(c) && !quote) { | |
72 | space = 1; | |
73 | continue; | |
74 | } | |
75 | if (!quote) { | |
76 | if (c == ';' || c == '#') { | |
77 | comment = 1; | |
78 | continue; | |
79 | } | |
80 | } | |
81 | if (space) { | |
82 | if (len) | |
83 | value[len++] = ' '; | |
84 | space = 0; | |
85 | } | |
86 | if (c == '\\') { | |
87 | c = get_next_char(); | |
88 | switch (c) { | |
89 | case '\n': | |
90 | continue; | |
91 | case 't': | |
92 | c = '\t'; | |
93 | break; | |
94 | case 'b': | |
95 | c = '\b'; | |
96 | break; | |
97 | case 'n': | |
98 | c = '\n'; | |
99 | break; | |
100 | /* Some characters escape as themselves */ | |
101 | case '\\': case '"': | |
102 | break; | |
103 | /* Reject unknown escape sequences */ | |
104 | default: | |
105 | return NULL; | |
106 | } | |
107 | value[len++] = c; | |
108 | continue; | |
109 | } | |
110 | if (c == '"') { | |
111 | quote = 1-quote; | |
112 | continue; | |
113 | } | |
114 | value[len++] = c; | |
115 | } | |
116 | } | |
117 | ||
118 | static inline int iskeychar(int c) | |
119 | { | |
120 | return isalnum(c) || c == '-'; | |
121 | } | |
122 | ||
123 | static int get_value(config_fn_t fn, void *data, char *name, unsigned int len) | |
124 | { | |
125 | int c; | |
126 | char *value; | |
127 | ||
128 | /* Get the full name */ | |
129 | for (;;) { | |
130 | c = get_next_char(); | |
131 | if (config_file_eof) | |
132 | break; | |
133 | if (!iskeychar(c)) | |
134 | break; | |
45de34bb | 135 | name[len++] = c; |
07800601 IM |
136 | if (len >= MAXNAME) |
137 | return -1; | |
138 | } | |
139 | name[len] = 0; | |
140 | while (c == ' ' || c == '\t') | |
141 | c = get_next_char(); | |
142 | ||
143 | value = NULL; | |
144 | if (c != '\n') { | |
145 | if (c != '=') | |
146 | return -1; | |
147 | value = parse_value(); | |
148 | if (!value) | |
149 | return -1; | |
150 | } | |
151 | return fn(name, value, data); | |
152 | } | |
153 | ||
154 | static int get_extended_base_var(char *name, int baselen, int c) | |
155 | { | |
156 | do { | |
157 | if (c == '\n') | |
158 | return -1; | |
159 | c = get_next_char(); | |
160 | } while (isspace(c)); | |
161 | ||
162 | /* We require the format to be '[base "extension"]' */ | |
163 | if (c != '"') | |
164 | return -1; | |
165 | name[baselen++] = '.'; | |
166 | ||
167 | for (;;) { | |
83a0944f IM |
168 | int ch = get_next_char(); |
169 | ||
170 | if (ch == '\n') | |
07800601 | 171 | return -1; |
83a0944f | 172 | if (ch == '"') |
07800601 | 173 | break; |
83a0944f IM |
174 | if (ch == '\\') { |
175 | ch = get_next_char(); | |
176 | if (ch == '\n') | |
07800601 IM |
177 | return -1; |
178 | } | |
83a0944f | 179 | name[baselen++] = ch; |
07800601 IM |
180 | if (baselen > MAXNAME / 2) |
181 | return -1; | |
182 | } | |
183 | ||
184 | /* Final ']' */ | |
185 | if (get_next_char() != ']') | |
186 | return -1; | |
187 | return baselen; | |
188 | } | |
189 | ||
190 | static int get_base_var(char *name) | |
191 | { | |
192 | int baselen = 0; | |
193 | ||
194 | for (;;) { | |
195 | int c = get_next_char(); | |
196 | if (config_file_eof) | |
197 | return -1; | |
198 | if (c == ']') | |
199 | return baselen; | |
200 | if (isspace(c)) | |
201 | return get_extended_base_var(name, baselen, c); | |
202 | if (!iskeychar(c) && c != '.') | |
203 | return -1; | |
204 | if (baselen > MAXNAME / 2) | |
205 | return -1; | |
206 | name[baselen++] = tolower(c); | |
207 | } | |
208 | } | |
209 | ||
210 | static int perf_parse_file(config_fn_t fn, void *data) | |
211 | { | |
212 | int comment = 0; | |
213 | int baselen = 0; | |
214 | static char var[MAXNAME]; | |
215 | ||
216 | /* U+FEFF Byte Order Mark in UTF8 */ | |
217 | static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf"; | |
218 | const unsigned char *bomptr = utf8_bom; | |
219 | ||
220 | for (;;) { | |
221 | int c = get_next_char(); | |
222 | if (bomptr && *bomptr) { | |
223 | /* We are at the file beginning; skip UTF8-encoded BOM | |
224 | * if present. Sane editors won't put this in on their | |
225 | * own, but e.g. Windows Notepad will do it happily. */ | |
226 | if ((unsigned char) c == *bomptr) { | |
227 | bomptr++; | |
228 | continue; | |
229 | } else { | |
230 | /* Do not tolerate partial BOM. */ | |
231 | if (bomptr != utf8_bom) | |
232 | break; | |
233 | /* No BOM at file beginning. Cool. */ | |
234 | bomptr = NULL; | |
235 | } | |
236 | } | |
237 | if (c == '\n') { | |
238 | if (config_file_eof) | |
239 | return 0; | |
240 | comment = 0; | |
241 | continue; | |
242 | } | |
243 | if (comment || isspace(c)) | |
244 | continue; | |
245 | if (c == '#' || c == ';') { | |
246 | comment = 1; | |
247 | continue; | |
248 | } | |
249 | if (c == '[') { | |
250 | baselen = get_base_var(var); | |
251 | if (baselen <= 0) | |
252 | break; | |
253 | var[baselen++] = '.'; | |
254 | var[baselen] = 0; | |
255 | continue; | |
256 | } | |
257 | if (!isalpha(c)) | |
258 | break; | |
259 | var[baselen] = tolower(c); | |
260 | if (get_value(fn, data, var, baselen+1) < 0) | |
261 | break; | |
262 | } | |
263 | die("bad config file line %d in %s", config_linenr, config_file_name); | |
264 | } | |
265 | ||
266 | static int parse_unit_factor(const char *end, unsigned long *val) | |
267 | { | |
268 | if (!*end) | |
269 | return 1; | |
270 | else if (!strcasecmp(end, "k")) { | |
271 | *val *= 1024; | |
272 | return 1; | |
273 | } | |
274 | else if (!strcasecmp(end, "m")) { | |
275 | *val *= 1024 * 1024; | |
276 | return 1; | |
277 | } | |
278 | else if (!strcasecmp(end, "g")) { | |
279 | *val *= 1024 * 1024 * 1024; | |
280 | return 1; | |
281 | } | |
282 | return 0; | |
283 | } | |
284 | ||
285 | static int perf_parse_long(const char *value, long *ret) | |
286 | { | |
287 | if (value && *value) { | |
288 | char *end; | |
289 | long val = strtol(value, &end, 0); | |
290 | unsigned long factor = 1; | |
291 | if (!parse_unit_factor(end, &factor)) | |
292 | return 0; | |
293 | *ret = val * factor; | |
294 | return 1; | |
295 | } | |
296 | return 0; | |
297 | } | |
298 | ||
07800601 IM |
299 | static void die_bad_config(const char *name) |
300 | { | |
301 | if (config_file_name) | |
302 | die("bad config value for '%s' in %s", name, config_file_name); | |
303 | die("bad config value for '%s'", name); | |
304 | } | |
305 | ||
306 | int perf_config_int(const char *name, const char *value) | |
307 | { | |
308 | long ret = 0; | |
309 | if (!perf_parse_long(value, &ret)) | |
310 | die_bad_config(name); | |
311 | return ret; | |
312 | } | |
313 | ||
a41794cd | 314 | static int perf_config_bool_or_int(const char *name, const char *value, int *is_bool) |
07800601 IM |
315 | { |
316 | *is_bool = 1; | |
317 | if (!value) | |
318 | return 1; | |
319 | if (!*value) | |
320 | return 0; | |
321 | if (!strcasecmp(value, "true") || !strcasecmp(value, "yes") || !strcasecmp(value, "on")) | |
322 | return 1; | |
323 | if (!strcasecmp(value, "false") || !strcasecmp(value, "no") || !strcasecmp(value, "off")) | |
324 | return 0; | |
325 | *is_bool = 0; | |
326 | return perf_config_int(name, value); | |
327 | } | |
328 | ||
329 | int perf_config_bool(const char *name, const char *value) | |
330 | { | |
331 | int discard; | |
332 | return !!perf_config_bool_or_int(name, value, &discard); | |
333 | } | |
334 | ||
45de34bb SE |
335 | const char *perf_config_dirname(const char *name, const char *value) |
336 | { | |
337 | if (!name) | |
338 | return NULL; | |
339 | return value; | |
340 | } | |
341 | ||
f37a291c | 342 | static int perf_default_core_config(const char *var __used, const char *value __used) |
07800601 IM |
343 | { |
344 | /* Add other config variables here and to Documentation/config.txt. */ | |
345 | return 0; | |
346 | } | |
347 | ||
f37a291c | 348 | int perf_default_config(const char *var, const char *value, void *dummy __used) |
07800601 IM |
349 | { |
350 | if (!prefixcmp(var, "core.")) | |
351 | return perf_default_core_config(var, value); | |
352 | ||
353 | /* Add other config variables here and to Documentation/config.txt. */ | |
354 | return 0; | |
355 | } | |
356 | ||
a41794cd | 357 | static int perf_config_from_file(config_fn_t fn, const char *filename, void *data) |
07800601 IM |
358 | { |
359 | int ret; | |
360 | FILE *f = fopen(filename, "r"); | |
361 | ||
362 | ret = -1; | |
363 | if (f) { | |
364 | config_file = f; | |
365 | config_file_name = filename; | |
366 | config_linenr = 1; | |
367 | config_file_eof = 0; | |
368 | ret = perf_parse_file(fn, data); | |
369 | fclose(f); | |
370 | config_file_name = NULL; | |
371 | } | |
372 | return ret; | |
373 | } | |
374 | ||
a41794cd | 375 | static const char *perf_etc_perfconfig(void) |
07800601 IM |
376 | { |
377 | static const char *system_wide; | |
378 | if (!system_wide) | |
379 | system_wide = system_path(ETC_PERFCONFIG); | |
380 | return system_wide; | |
381 | } | |
382 | ||
383 | static int perf_env_bool(const char *k, int def) | |
384 | { | |
385 | const char *v = getenv(k); | |
386 | return v ? perf_config_bool(k, v) : def; | |
387 | } | |
388 | ||
a41794cd | 389 | static int perf_config_system(void) |
07800601 IM |
390 | { |
391 | return !perf_env_bool("PERF_CONFIG_NOSYSTEM", 0); | |
392 | } | |
393 | ||
a41794cd | 394 | static int perf_config_global(void) |
07800601 IM |
395 | { |
396 | return !perf_env_bool("PERF_CONFIG_NOGLOBAL", 0); | |
397 | } | |
398 | ||
399 | int perf_config(config_fn_t fn, void *data) | |
400 | { | |
401 | int ret = 0, found = 0; | |
402 | char *repo_config = NULL; | |
403 | const char *home = NULL; | |
404 | ||
405 | /* Setting $PERF_CONFIG makes perf read _only_ the given config file. */ | |
406 | if (config_exclusive_filename) | |
407 | return perf_config_from_file(fn, config_exclusive_filename, data); | |
408 | if (perf_config_system() && !access(perf_etc_perfconfig(), R_OK)) { | |
409 | ret += perf_config_from_file(fn, perf_etc_perfconfig(), | |
410 | data); | |
411 | found += 1; | |
412 | } | |
413 | ||
414 | home = getenv("HOME"); | |
415 | if (perf_config_global() && home) { | |
416 | char *user_config = strdup(mkpath("%s/.perfconfig", home)); | |
417 | if (!access(user_config, R_OK)) { | |
418 | ret += perf_config_from_file(fn, user_config, data); | |
419 | found += 1; | |
420 | } | |
421 | free(user_config); | |
422 | } | |
423 | ||
424 | repo_config = perf_pathdup("config"); | |
425 | if (!access(repo_config, R_OK)) { | |
426 | ret += perf_config_from_file(fn, repo_config, data); | |
427 | found += 1; | |
428 | } | |
429 | free(repo_config); | |
430 | if (found == 0) | |
431 | return -1; | |
432 | return ret; | |
433 | } | |
434 | ||
07800601 IM |
435 | /* |
436 | * Call this to report error for your variable that should not | |
437 | * get a boolean value (i.e. "[my] var" means "true"). | |
438 | */ | |
439 | int config_error_nonbool(const char *var) | |
440 | { | |
441 | return error("Missing value for '%s'", var); | |
442 | } | |
45de34bb SE |
443 | |
444 | struct buildid_dir_config { | |
445 | char *dir; | |
446 | }; | |
447 | ||
448 | static int buildid_dir_command_config(const char *var, const char *value, | |
449 | void *data) | |
450 | { | |
451 | struct buildid_dir_config *c = data; | |
452 | const char *v; | |
453 | ||
454 | /* same dir for all commands */ | |
455 | if (!prefixcmp(var, "buildid.") && !strcmp(var + 8, "dir")) { | |
456 | v = perf_config_dirname(var, value); | |
457 | if (!v) | |
458 | return -1; | |
459 | strncpy(c->dir, v, MAXPATHLEN-1); | |
460 | c->dir[MAXPATHLEN-1] = '\0'; | |
461 | } | |
462 | return 0; | |
463 | } | |
464 | ||
465 | static void check_buildid_dir_config(void) | |
466 | { | |
467 | struct buildid_dir_config c; | |
468 | c.dir = buildid_dir; | |
469 | perf_config(buildid_dir_command_config, &c); | |
470 | } | |
471 | ||
472 | void set_buildid_dir(void) | |
473 | { | |
474 | buildid_dir[0] = '\0'; | |
475 | ||
476 | /* try config file */ | |
477 | check_buildid_dir_config(); | |
478 | ||
479 | /* default to $HOME/.debug */ | |
480 | if (buildid_dir[0] == '\0') { | |
481 | char *v = getenv("HOME"); | |
482 | if (v) { | |
483 | snprintf(buildid_dir, MAXPATHLEN-1, "%s/%s", | |
484 | v, DEBUG_CACHE_DIR); | |
485 | } else { | |
486 | strncpy(buildid_dir, DEBUG_CACHE_DIR, MAXPATHLEN-1); | |
487 | } | |
488 | buildid_dir[MAXPATHLEN-1] = '\0'; | |
489 | } | |
490 | /* for communicating with external commands */ | |
491 | setenv("PERF_BUILDID_DIR", buildid_dir, 1); | |
492 | } |