1#include <signal.h>
2#include "syscall.h"
3#include "libc.h"
4
5int __sigaction(int, const struct sigaction *, struct sigaction *);
6
7void (*signal(int sig, void (*func)(int)))(int)
8{
9	struct sigaction sa_old, sa = { .sa_handler = func, .sa_flags = SA_RESTART };
10	if (__sigaction(sig, &sa, &sa_old) < 0)
11		return SIG_ERR;
12	return sa_old.sa_handler;
13}
14
15weak_alias(signal, bsd_signal);
16weak_alias(signal, __sysv_signal);
17