V7/usr/src/cmd/standalone/cpgroup

Find at most related files.
including files from this version of Unix. 
/etc/mkfs /dev/rrk2 4000
/etc/mount /dev/rk2 /x
dir=$1
shift
cd /x
(cd $dir; tar cf - $*) | tar xf -
cd /
/etc/umount /dev/rk2