- char *homedir, *configfile;
- size_t len;
- char buf[MAXLINE];
- char *key, *value;
- char *default_browser = NULL;
- FILE *fp;
- regex_t re_ignore, re_config1, re_config2;
- regmatch_t substrs[3];
-
- set_config_defaults(&ctx);
-
- if (!(homedir = getenv("HOME")))
- homedir = DEFAULT_HOMEDIR;
- len = strlen(homedir) + strlen(CONFIGFILE_LOC) + 1;
- if (!(configfile = calloc(len, sizeof(char))))
- goto out_noopen;
- snprintf(configfile, len, "%s%s", homedir, CONFIGFILE_LOC);
-
- if (!(fp = fopen(configfile, "r")))
- goto out_noopen;
-
- /* compile regex matching blank lines or comments */
- if (regcomp(&re_ignore, "^[[:space:]]*(#|$)", REG_EXTENDED|REG_NOSUB))
- goto out_nore;
- /* compile regex matching foo = "bar", with arbitrary whitespace at
- beginning and end of line and surrounding the = */
- if (regcomp(&re_config1,
- "^[[:space:]]*([^=[:space:]]+)[[:space:]]*=[[:space:]]*\"(.*)\"[[:space:]]*$",
- REG_EXTENDED)) {
- regfree(&re_ignore);
- goto out_nore;
- }
- /* compile regex matching foo = bar, with arbitrary whitespace at
- beginning of line and surrounding the = */
- if (regcomp(&re_config2,
- "^[[:space:]]*([^=[:space:]]+)[[:space:]]*=[[:space:]]*(.*)$",
- REG_EXTENDED|REG_NEWLINE)) {
- regfree(&re_ignore);
- regfree(&re_config1);
- goto out_nore;
- }
-
- /* Read in the config file one line at a time and parse it
- XXX doesn't deal with lines longer than MAXLINE */
- while (fgets(buf, MAXLINE, fp)) {
- printf("%s", buf);
- /* skip blank lines and comments */
- if (!regexec(&re_ignore, buf, 0, NULL, 0))
- continue;
-
- /* Find the substrings corresponding to the key and value
- If the line doesn't match our idea of a config file entry,
- skip it */
- if (regexec(&re_config1, buf, 3, substrs, 0) &&
- regexec(&re_config2, buf, 3, substrs, 0))
- continue;
- if (substrs[1].rm_so == -1 || substrs[2].rm_so == -1)
- continue;
-
- /* copy the config value into a new string */
- len = substrs[2].rm_eo - substrs[2].rm_so;
- if (!(value = calloc(len+1, sizeof(char))))
- goto out;
- strncpy(value, buf+substrs[2].rm_so, len);
- /* calloc() zeroes the memory, so string is automatically
- null terminated */
-
- /* make key point to a null-terminated string holding the
- config key */
- key = buf + substrs[1].rm_so;
- buf[substrs[1].rm_eo] = '\0';
-
- if (!strcmp(key, "continuous_mode")) {
- ctx.continuous_mode = atoi(value);
- free(value);
- } else if (!strcmp(key, "default_browser")) {
- if (!default_browser)
- default_browser = value;
- } else if (!strcmp(key, "other_browser_cmd")) {
- if (!ctx.other_browser_cmd)
- ctx.other_browser_cmd = value;
- } else {
- /* Don't need this line's contents */
- free(value);