xfs_rtcp --VERSION (return code: 0)
xfs_rtcp: invalid option -- '-'
xfs_rtcp version 4.3.0
xfs_rtcp -HELP (return code: 2)
xfs_rtcp: invalid option -- '-'
xfs_rtcp: invalid option -- 'h'
xfs_rtcp: must specify files to copy
xfs_rtcp [-e extsize] [-p] [-V] source target