sig_pass_to_chld
signal(SIGTERM, sig_pass_to_chld);
signal(SIGHUP, sig_pass_to_chld);
signal(SIGUSR1, sig_pass_to_chld);
static void sig_pass_to_chld(int);
signal(SIGALRM, sig_pass_to_chld);
signal(SIGTERM, sig_pass_to_chld);
signal(SIGHUP, sig_pass_to_chld);
signal(SIGINT, sig_pass_to_chld);
signal(SIGQUIT, sig_pass_to_chld);
static void sig_pass_to_chld(int);
sa.sa_handler = sig_pass_to_chld;
static void sig_pass_to_chld(int);