centos man page for parport_claim_or_block

PARPORT_CLAIM_OR_BLO(9) 				       Parallel Port Devices					   PARPORT_CLAIM_OR_BLO(9)

NAME
       parport_claim_or_block - claim access to a parallel port device

SYNOPSIS
       int parport_claim_or_block(struct pardevice * dev);

ARGUMENTS
       dev
	   pointer to structure representing a device on the port

DESCRIPTION
       This behaves like parport_claim, but will block if necessary to wait for the port to be free. A return value of 1 indicates that it slept;
       0 means that it succeeded without needing to sleep. A negative error code indicates failure.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   PARPORT_CLAIM_OR_BLO(9)