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AIXLink/X.25 1.1 for AIX: Guide and Reference

X25_DIAG_IO_READ (Read Register) x25sioctl X.25 Device Handler Operation


Reads from an I/O register on the X.25 Interface Co-Processor/2.


Note: Only a process that has opened the device for diagnostics can issue this call.

The X25_DIAG_IO_READ x25sioctl operation reads from an I/O register on the X.25 Interface Co-Processor/2. Both direct and indirect registers can be read since the card pointer register is adjusted by this operation.

For this operation, the arg parameter returns a pointer to an x25_diag_io structure. The value this operation reads is placed in the value field of the x25_diag_io structure.

Execution Environment

The X25_DIAG_IO_READ operation can be called from the process environment only.

Return Values

A return code of -1 indicates an unsuccessful operation. If -1 is returned, the kernel sets the errno global variable to one of the following values:

EACCES The device was not opened in diagnostic mode.
ENXIO The operation attempted to read a card that was not configured.

Implementation Specifics

The X25_DIAG_IO_READ operation functions with an X.25 Interface Co-Processor/2 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 X25_DIAG_IO_WRITE x25sioctl X.25 Device Handler Operation, X25_DIAG_MEM_READ x25sioctl X.25 Device Handler Operation, X25_DIAG_MEM_WRITE x25sioctl X.25 Device Handler Operation, X25_DIAG_TASK x25sioctl X.25 Device Handler Operation.

The x25sioctl entry point.

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