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