ref: 4a916ba86e700d5e99311b45a81dc7be8a50b843
dir: /rc/bin/dircp/
#!/bin/rc # dircp src dest - copy a tree with tar switch($#*){ case 2 @ {builtin cd $1 && tar cif /fd/1 .} | @ {builtin cd $2 && tar xTf /fd/0} case * echo usage: dircp from to >[1=2] exit usage }