ipc_parse_version(9) centos man page | unix.com

IPC_PARSE_VERSION(9)					       Kernel IPC facilities					      IPC_PARSE_VERSION(9)

NAME
       ipc_parse_version - IPC call version

SYNOPSIS
       int ipc_parse_version(int * cmd);

ARGUMENTS
       cmd
	   pointer to command

DESCRIPTION
       Return IPC_64 for new style IPC and IPC_OLD for old style IPC. The cmd value is turned from an encoding command and version into just the
       command code.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						      IPC_PARSE_VERSION(9)