int find_arg(const char *arg, char **argv);
void free_argv(char **argv);
int para_regcomp(regex_t *preg, const char *regex, int cflags);
int find_arg(const char *arg, char **argv);
void free_argv(char **argv);
int para_regcomp(regex_t *preg, const char *regex, int cflags);