centos man page for parport_claim

PARPORT_CLAIM(9)					       Parallel Port Devices						  PARPORT_CLAIM(9)

NAME
       parport_claim - claim access to a parallel port device

SYNOPSIS
       int parport_claim(struct pardevice * dev);

ARGUMENTS
       dev
	   pointer to structure representing a device on the port

DESCRIPTION
       This function will not block and so can be used from interrupt context. If parport_claim succeeds in claiming access to the port it returns
       zero and the port is available to use. It may fail (returning non-zero) if the port is in use by another driver and that driver is not
       willing to relinquish control of the port.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							  PARPORT_CLAIM(9)