/*

 * Done to fix bug #381783 in Gentoo Bugzilla, by i.Dark_Templar

 * This function resolves symlinks in paths inside regexp

 * Returns new string (should be freed later by free()) or NULL on errors

 * Paramaters:

 * 1. char *string - starting regexp

 * 2. const char *delimiter - used delimiter (i've seen '|' used in OpenRC scripts)

 */

char* regexp_resolve_symlinks(char* string, const char* delimiter) {

	char *oldstr, *newstr = NULL, *tmp, *token, *saveptr;

	char real_path[PATH_MAX + 1];

	oldstr = strdup(string);

	if (!oldstr) return NULL; /* not enough memory? abort */

	for (token = strtok_r(oldstr, delimiter, &saveptr); token != NULL; token = strtok_r(NULL, delimiter, &saveptr)) {

		if (realpath(token, real_path) != NULL) {

			token = real_path; /* could resolve path, add resolved to new string, otherwise use unresolved, probably it should be so */

		}

		tmp = realloc(newstr, ((newstr) ? (strlen(newstr) + strlen(delimiter)) : (0)) + strlen(token) + 1);

		if (!tmp) { /* not enough memory? abort */

			free(oldstr);

			if (newstr) free(newstr);

			return NULL;

		}

		if (newstr) strcat(tmp, delimiter); /* not first item, add delimiter */

		newstr = tmp;

		strcat(newstr, token);

	}

	free(oldstr);

	return newstr;

}