1#include "libc.h" 2#include <errno.h> 3#include <signal.h> 4 5void (*signal(int sig, void (*func)(int)))(int) { 6 errno = ENOSYS; 7 return SIG_ERR; 8} 9 10weak_alias(signal, bsd_signal); 11weak_alias(signal, __sysv_signal); 12