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AIX Version 4.3 Kernel and Subsystems Technical Reference, Volume 2

tokclose Token-Ring Device Handler Entry Point


Resets the token-ring device handler to a known state and frees system resources.


#include <sys/device.h>
#include <sys/comio.h>
#include <sys/tokuser.h>
int tokclose (devno, chan)
dev_t devno;
int chan;


devno Specifies major and minor device numbers.
chan Identifies the channel number assigned by the tokmpx entry point.


The tokclose entry point is called when a user-mode caller issues a close subroutine. The tokclose entry point can also be invoked in response to a fp_close kernel service.

Execution Environment

The tokclose entry point can be called from the process environment only.

Return Values

ENXIO Indicates the specified minor number is not valid.

Implementation Specifics

The tokclose entry point functions with a Token-Ring High Performance Network Adapter that has been correctly configured for use on a qualified network. Consult adapter specifications for more information on configuring the adapter and network qualifications.

Related Information

The tokmpx entry point, tokopen entry point.

The ddclose Communications PDH entry point.

The close subroutine.

The fp_close kernel service.

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