[9fans] spam script

[rog@vitanuova.com]

while we're on the subject of shell scripts, if anyone is interested
in building up a spam file with a view to training a bayesian filter
or somesuch, here's a script that makes it easier.

i haven't installed a filter yet, but i've accumulated 15MB of spam in
a month and a half...

it works under acme Mail; just highlight some messages and execute
"spam" (assuming that's what you've named the script); alternatively
execute "spam" within a message window.

unfortunately it's unable to delete the messages automatically and
currently it assumes it's dealing with /mail/fs/mbox.

  cheers,
    rog.

PS. it was a bit of an effort to get the current selection of an acme
window from within a script; it would make things easier if:
- the id of the current acme window was available as well as its tag filename;
- the addr file didn't revert back to its default state when the ctl file was closed;
- the data file provided only the number of characters selected by the address.
... but maybe these are important properties, i dunno.

#!/bin/rc
rfork n
fn save {
	{echo From spam; cat $1; echo} >> $home/spam
}
fn saveselected {
	cd $1
	{echo 'addr=dot' > ctl; x=`{cat}} < addr
	msgs=`{>[2] /dev/null dd -count 1 -bs `{echo $x(2) $x(1) -p | dc} < data |
		sed -e '/^	/d' -e 's/^\(deleted\)-//'  -e 's:/.*::'}
	for(i in $msgs)
		save /mail/fs/mbox/$i/raw
}

if(~ $#* 0 && ~ $#% 1){
	if(~ $% /mail/fs/mbox/){
		poss=`{awk '{print $1, $6}' < /mnt/acme/index | grep '^[0-9]+ /mail/fs/mbox/$'}
		if(! ~ $#poss 2){
			echo no acme window found
			exit nope
		}
		saveselected /mnt/acme/$poss(1)
	}

	if not
	if(test -f $%/raw)
		save $%/raw
}

if not
for(i in $*){
	save /mail/fs/mbox/$i/raw
}