SYSIFCOPT Syntax: 1? SYSIFCOPT( 1.1! *IFS64IO (2) 1.1 *NOIFSIO (1) 1.1? 1.1 *IFSIO 1.2! *NOASYNCSIGNAL (3) 1.2? 1.2 *ASYNCSIGNAL (3) 1.3 )