BPX1UPT (unlockpt) example

The following code unlocks the slave pseudoterminal device associated with the master to which the file descriptor refers. For the callable service, see unlockpt (BPX1UPT, BPX4UPT) — Unlock a pseudoterminal master/slave pair. AMODE 64 callers use BPX4UPT (unlockpt) example.

                                              
         CALL  BPX1UPT,              Unlocks slave pty from master     +
               (MASTER_FD,           Input: File descriptor            +
               RETVAL,               Return value: 0 or -1             +
               RETCODE,              Return code                       +
               RSNCODE),             Reason code                       +
               VL,MF=(E,PLIST)       ----------------------------------