1570af302Sopenharmony_ci#include <signal.h> 2570af302Sopenharmony_ci 3570af302Sopenharmony_civoid (*signal(int sig, void (*func)(int)))(int) 4570af302Sopenharmony_ci{ 5570af302Sopenharmony_ci struct sigaction sa_old, sa = { .sa_handler = func, .sa_flags = SA_RESTART }; 6570af302Sopenharmony_ci if (__sigaction(sig, &sa, &sa_old) < 0) 7570af302Sopenharmony_ci return SIG_ERR; 8570af302Sopenharmony_ci return sa_old.sa_handler; 9570af302Sopenharmony_ci} 10570af302Sopenharmony_ci 11570af302Sopenharmony_ciweak_alias(signal, bsd_signal); 12570af302Sopenharmony_ciweak_alias(signal, __sysv_signal); 13