ref: dfea95b3c29ef4a6de2713a946453d3a022ae0b4
dir: /rc/bin/ape/dircp/
#!/bin/rc
# dircp src dest - copy a tree with ape's tar
switch($#*){
case 2
@{cd $1 && tar cf /fd/1 .} | @{cd $2 && tar xf /fd/0}
case *
echo usage: dircp from to >[1=2]
exit usage
}