37 #define SIGCLD SIGCHLD
40 typedef void (*sighandler_t
)(int);
42 #define SIG_DFL ((sighandler_t) 0l)
43 #define SIG_IGN ((sighandler_t) 1l)
44 #define SIG_ERR ((sighandler_t) -1l)
46 sighandler_t
signal(int signum
, sighandler_t action
);
47 int kill(int pid
, int sig
);