code: plan9front

ref: 5622b0bbd878dbc34045cc6fd37cffa64461eabe
dir: /rc/bin/splitmbox/

#!/bin/rc
rfork en

mbox = /mail/box/$user/mbox
dest = /mail/box/$user/mboxdir-

fn usage{
	echo 'usage: splitmbox [[mbox] dest]'>[1=2]
	exit usage
}

fn dirbits{
	awk -v 'isdir='$1 '
	{
		str = $1
		printf "0"
		for(i = 3; i < 12; i += 3){
			s = substr(str, i, 3);
			b = 0;
			if(s ~ /r/)
				b += 2
			if(s ~ /w/)
				b += 4
			if(s ~ /x/ || isdir && s ~ /[rwx]/)
				b += 1
			printf b
		}
		print ""
	}
	'
}

fn docopy{
	src=$1; shift
	dst=$dest/$1; shift
	echo $src '->' $dst
	# painful reminder that rc does need a break statement.
	done=()
	while(~ $#done 0){
		if(! test -f $dst^.^$1){
			if(! cp $src/rawunix $dst^.^$1)
				exit copy
			done = 1
		}
		shift
	}
}

fn doit{
	upas/fs -pf$mbox
	if(! test -d $dest)
		mkdir $dest #upas/nedmail -c $dest
	if(! test -d $dest)
		exits mkdir
	if(! chgrp $user $des)
		exits chgrp
	if(! chmod g+rwx $dest)
		exits chmod
	if(~ $mbox mbox */mbox)
	if(! chmod o+wx $dest)
		exits chmod

	cd /mail/fs/mbox
	l = `{{for(i in [0-9]*) echo $i} | sort -n}
	echo $l
	if(! ~ $l '[0-9]*')
	for(i in $l)
		docopy $i `{cat $i/fileid|sed 's/\.00$//g'} `{seq -w 0 99}
}

lucky = cat
if(~ $1 -l){
	shift
	lucky = rc
}

switch($#*){
case 0
case 1
	mbox=`{cleanname -d `{pwd} $1}
case 2
	mbox=`{cleanname -d `{pwd} $1}
	dest=$2
case *
	usage
}

usenupas
whatis dest
doit

bits=`{ls -ld $mbox | dirbits 1}
chmod $bits $dest
if(~ $mbox mbox || ~ `{ls -ld $mbox | sed 's/ .*//'} *w)
	chgrp $user $dest


{
	echo '#' if everything is fine, execute the following commands
	echo mv $mbox $mbox^- '&&' mv $dest $mbox
} | $lucky