ref: ea413b4a62be9993e4b63bf237f0b1d482f4aafa dir: /sys/src/cmd/upas/misc/mail.rc/
#!/bin/rc switch($#*){ case 0 exec upas/nedmail } switch($1){ case -f* -r* -c* -m* exec upas/nedmail $* case * exec upas/marshal -8 $* }