Checks if a given band is writable.
The I_CANPUT operation checks a given priority band to see if it can be written on. The arg parameter contains the priority band to be checked.
The return value is set to one of
|0||The band is flow controlled.|
|1||The band is writable.|
|-1||An error occurred.|
If unsuccessful, the
errno global variable is set to the following value:
|EINVAL||The value in the arg parameter is invalid.|
This operation is part of STREAMS Kernel Extensions.
The streamio operations.
Understanding STREAMS Messages in AIX 5L Version 5.1 Communications Programming Concepts.