1#include <signal.h>
 2#include "syscall.h"
 3
 4void (*signal(int sig, void (*func)(int)))(int)
 5{
 6	struct sigaction sa_old, sa = { .sa_handler = func, .sa_flags = SA_RESTART };
 7	if (__sigaction(sig, &sa, &sa_old) < 0)
 8		return SIG_ERR;
 9	return sa_old.sa_handler;
10}
11
12weak_alias(signal, bsd_signal);
13weak_alias(signal, __sysv_signal);