ref: 6c5e9f73197f0e6bfc59119541312a1d281133b2
dir: /acme/bin/Unspam/
#!/bin/rc
if(! ~ $#* 0){
echo usage: Unspam >[1=2]
exit usage
}
if(! ~ `{pwd} /mail/fs/*/[0-9]* || ! test -f raw || ! test -f unixheader){
echo must run in mail directory >[1=2]
exit 'bad dir'
}
cat unixheader raw | upas/unspam