SIG_ERR
if (savsig->sighandler == SIG_ERR) {
return SIG_ERR;
return SIG_ERR;
if (result == SIG_ERR)
return SIG_ERR;
return SIG_ERR;
return SIG_ERR;
return SIG_ERR;
return SIG_ERR;
return SIG_ERR;
return SIG_ERR;
else if (action.sa_handler == SIG_ERR)
if (signal(SIGSEGV, signal_handler) == SIG_ERR) {
if (signal(SIGUSR1, signal_handler) == SIG_ERR) {
if (signal(SIGUSR1, signal_handler) == SIG_ERR) {