Flushes all input or output queues.
The I_FLUSH operation
flushes all input or output queues, depending on the
value of the arg parameter. Legal values for the
arg parameter are:
FLUSHR | Flush read queues. |
FLUSHW | Flush write queues. |
FLUSHRW | Flush read and write queues. |
If unsuccessful, the
errno global variable is set to one of the following values:
ENOSR | Unable to allocate buffers for flush message due to insufficient STREAMS memory resources. |
EINVAL | Invalid value for the arg parameter. |
ENXIO | Hangup received on the fildes parameter. |
This operation is part of STREAMS Kernel Extensions.
The streamio operations.
The I_FLUSHBAND streamio operation.
The flushband utility, flushq utility.