4 * Helper functions for parsing config items.
5 * Originally copied from GIT source.
7 * Copyright (C) Linus Torvalds, 2005
8 * Copyright (C) Johannes Schindelin, 2005
17 #define DEBUG_CACHE_DIR ".debug"
20 char buildid_dir[MAXPATHLEN]; /* root dir for buildid, binary cache */
22 static FILE *config_file;
23 static const char *config_file_name;
24 static int config_linenr;
25 static int config_file_eof;
27 static const char *config_exclusive_filename;
29 static int get_next_char(void)
35 if ((f = config_file) != NULL) {
38 /* DOS like systems */
55 static char *parse_value(void)
57 static char value[1024];
58 int quote = 0, comment = 0, space = 0;
62 int c = get_next_char();
64 if (len >= sizeof(value) - 1)
74 if (isspace(c) && !quote) {
79 if (c == ';' || c == '#') {
103 /* Some characters escape as themselves */
106 /* Reject unknown escape sequences */
121 static inline int iskeychar(int c)
123 return isalnum(c) || c == '-' || c == '_';
126 static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
131 /* Get the full name */
143 while (c == ' ' || c == '\t')
150 value = parse_value();
154 return fn(name, value, data);
157 static int get_extended_base_var(char *name, int baselen, int c)
163 } while (isspace(c));
165 /* We require the format to be '[base "extension"]' */
168 name[baselen++] = '.';
171 int ch = get_next_char();
178 ch = get_next_char();
182 name[baselen++] = ch;
183 if (baselen > MAXNAME / 2)
188 if (get_next_char() != ']')
193 static int get_base_var(char *name)
198 int c = get_next_char();
204 return get_extended_base_var(name, baselen, c);
205 if (!iskeychar(c) && c != '.')
207 if (baselen > MAXNAME / 2)
209 name[baselen++] = tolower(c);
213 static int perf_parse_file(config_fn_t fn, void *data)
217 static char var[MAXNAME];
219 /* U+FEFF Byte Order Mark in UTF8 */
220 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
221 const unsigned char *bomptr = utf8_bom;
224 int c = get_next_char();
225 if (bomptr && *bomptr) {
226 /* We are at the file beginning; skip UTF8-encoded BOM
227 * if present. Sane editors won't put this in on their
228 * own, but e.g. Windows Notepad will do it happily. */
229 if ((unsigned char) c == *bomptr) {
233 /* Do not tolerate partial BOM. */
234 if (bomptr != utf8_bom)
236 /* No BOM at file beginning. Cool. */
246 if (comment || isspace(c))
248 if (c == '#' || c == ';') {
253 baselen = get_base_var(var);
256 var[baselen++] = '.';
262 var[baselen] = tolower(c);
263 if (get_value(fn, data, var, baselen+1) < 0)
266 die("bad config file line %d in %s", config_linenr, config_file_name);
269 static int parse_unit_factor(const char *end, unsigned long *val)
273 else if (!strcasecmp(end, "k")) {
277 else if (!strcasecmp(end, "m")) {
281 else if (!strcasecmp(end, "g")) {
282 *val *= 1024 * 1024 * 1024;
288 static int perf_parse_long(const char *value, long *ret)
290 if (value && *value) {
292 long val = strtol(value, &end, 0);
293 unsigned long factor = 1;
294 if (!parse_unit_factor(end, &factor))
302 static void die_bad_config(const char *name)
304 if (config_file_name)
305 die("bad config value for '%s' in %s", name, config_file_name);
306 die("bad config value for '%s'", name);
309 int perf_config_int(const char *name, const char *value)
312 if (!perf_parse_long(value, &ret))
313 die_bad_config(name);
317 static int perf_config_bool_or_int(const char *name, const char *value, int *is_bool)
324 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes") || !strcasecmp(value, "on"))
326 if (!strcasecmp(value, "false") || !strcasecmp(value, "no") || !strcasecmp(value, "off"))
329 return perf_config_int(name, value);
332 int perf_config_bool(const char *name, const char *value)
335 return !!perf_config_bool_or_int(name, value, &discard);
338 const char *perf_config_dirname(const char *name, const char *value)
345 static int perf_default_core_config(const char *var __maybe_unused,
346 const char *value __maybe_unused)
348 /* Add other config variables here. */
352 int perf_default_config(const char *var, const char *value,
353 void *dummy __maybe_unused)
355 if (!prefixcmp(var, "core."))
356 return perf_default_core_config(var, value);
358 /* Add other config variables here. */
362 static int perf_config_from_file(config_fn_t fn, const char *filename, void *data)
365 FILE *f = fopen(filename, "r");
370 config_file_name = filename;
373 ret = perf_parse_file(fn, data);
375 config_file_name = NULL;
380 static const char *perf_etc_perfconfig(void)
382 static const char *system_wide;
384 system_wide = system_path(ETC_PERFCONFIG);
388 static int perf_env_bool(const char *k, int def)
390 const char *v = getenv(k);
391 return v ? perf_config_bool(k, v) : def;
394 static int perf_config_system(void)
396 return !perf_env_bool("PERF_CONFIG_NOSYSTEM", 0);
399 static int perf_config_global(void)
401 return !perf_env_bool("PERF_CONFIG_NOGLOBAL", 0);
404 int perf_config(config_fn_t fn, void *data)
406 int ret = 0, found = 0;
407 const char *home = NULL;
409 /* Setting $PERF_CONFIG makes perf read _only_ the given config file. */
410 if (config_exclusive_filename)
411 return perf_config_from_file(fn, config_exclusive_filename, data);
412 if (perf_config_system() && !access(perf_etc_perfconfig(), R_OK)) {
413 ret += perf_config_from_file(fn, perf_etc_perfconfig(),
418 home = getenv("HOME");
419 if (perf_config_global() && home) {
420 char *user_config = strdup(mkpath("%s/.perfconfig", home));
423 if (user_config == NULL) {
424 warning("Not enough memory to process %s/.perfconfig, "
425 "ignoring it.", home);
429 if (stat(user_config, &st) < 0)
432 if (st.st_uid && (st.st_uid != geteuid())) {
433 warning("File %s not owned by current user or root, "
434 "ignoring it.", user_config);
441 ret += perf_config_from_file(fn, user_config, data);
453 * Call this to report error for your variable that should not
454 * get a boolean value (i.e. "[my] var" means "true").
456 int config_error_nonbool(const char *var)
458 return error("Missing value for '%s'", var);
461 struct buildid_dir_config {
465 static int buildid_dir_command_config(const char *var, const char *value,
468 struct buildid_dir_config *c = data;
471 /* same dir for all commands */
472 if (!prefixcmp(var, "buildid.") && !strcmp(var + 8, "dir")) {
473 v = perf_config_dirname(var, value);
476 strncpy(c->dir, v, MAXPATHLEN-1);
477 c->dir[MAXPATHLEN-1] = '\0';
482 static void check_buildid_dir_config(void)
484 struct buildid_dir_config c;
486 perf_config(buildid_dir_command_config, &c);
489 void set_buildid_dir(void)
491 buildid_dir[0] = '\0';
493 /* try config file */
494 check_buildid_dir_config();
496 /* default to $HOME/.debug */
497 if (buildid_dir[0] == '\0') {
498 char *v = getenv("HOME");
500 snprintf(buildid_dir, MAXPATHLEN-1, "%s/%s",
503 strncpy(buildid_dir, DEBUG_CACHE_DIR, MAXPATHLEN-1);
505 buildid_dir[MAXPATHLEN-1] = '\0';
507 /* for communicating with external commands */
508 setenv("PERF_BUILDID_DIR", buildid_dir, 1);