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Exchange/SNA Manual

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CLOSE Procedure
Exchange/SNA System Procedure Calls
5–8 104700 Tandem Computers Incorporated
CLOSE Procedure The CLOSE procedure terminates access to a previously opened subdevice supported
by the Exchange/SNA line server.
CLOSE (
filenum
);
filenum
INT:value
is the file number of a previously opened subdevice supported by the
Exchange/SNA line server. The number you specify here is the number returned
by the call to OPEN that opened the subdevice.
Considerations The CLOSE procedure terminates access to a previously opened subdevice supported
by the line server. Your program should call CLOSE after it has finished using the
subdevice. After the call to CLOSE, the subdevice becomes available for use by other
processes. The call to CLOSE does not stop the Exchange/SNA line server. To stop an
Exchange/SNA line server, use the Exchange/SNA STOP command. See the STOP
command in Section 3 for more information.
If a nowait I/O operation is outstanding at the time of the call to CLOSE, that
operation is canceled. No indication of whether or not the physical I/O operation
completed is given.