s/^/0000/ : h s/7/rwx/g s/6/rw-/g s/5/r-x/g s/4/r--/g s/3/-wx/g s/2/-w-/g s/1/--x/g s/0/---/g s/../ is / x G s/\n//p s/ .*// /777/Q h y/01234567/12345670/ x G s/[^7]7*\n.*\([^0]0*\)/\1/ b
Note that non-ascii characters in the above source code will be escaped (such as \x9f).