#!/bin/sh
#
# handle-auto
# John Simpson <jms1@jms1.net>
#     Original: 2009-09-07
# This version: 2009-12-18
#
# allows "auto-_____@domain.xyz" automatic mailboxes. any messages sent to
# an automatic address will be stored in a child folder within that folder.
# if the child folder doesn't exist, it will be created automatically.
#
# this script should be called from ".qmail-auto-default" with a line like:
#
# |/var/qmail/bin/handle-auto PARENT
#
# where PARENT is the full path to the parent of where the automatic folders
# will be created. if this location is the root of a Maildir (i.e. an INBOX)
# then this value should end with "/". otherwise (i.e. if the automatic
# folders will be created within another folder) then this value should NOT
# end with a "/".
#
# documentation: http://qmail.jms1.net/scripts/handle-auto.shtml

PATH=/usr/bin:/bin:/usr/local/bin:/var/qmail/bin

###############################################################################
#
# if "hostname -s" doesn't return a valid name on your system, or if you
# don't want to waste the extra CPU cycles to look up the name every time,
# you should set a static hostname value here. this value is used to build
# the filename of the message in the final Maildir.

HOSTNAME=`hostname -s`

###############################################################################
#
# if you want the automatic folder names to be uppercase or lowercase,
# uncomment one of these lines. otherwise, folder names will be created in
# whatever case they arrive in- which means "abc", "abC", "aBc", "aBC", "Abc",
# "AbC", "ABc", and "ABC" will all be created as separate folders.

#CASE=UPPER
#CASE=LOWER

###############################################################################
###############################################################################
###############################################################################
#
# build the name of target maildir
#
# note: if you use some other IMAP server and it creates the folder names
# differently, you will need to adjust this code, and probably change the
# format of the PARENT value you pass in from the command line. if you end up
# doing this, please let me know about it, so i can update the script with
# notes for users of other IMAP servers.

PARENT="${1:?$0: ERROR: No PARENT location specified on command line}"

if [ "${CASE:-}" = "LOWER" ]
then
	ENAME=`echo "${EXT2:-}" | tr 'A-Z' 'a-z'`
elif [ "${CASE:-}" = "UPPER" ]
then
	ENAME=`echo "${EXT2:-}" | tr 'a-z' 'A-Z'`
else
	ENAME=${EXT2:-}
fi

TARGET="$PARENT${ENAME:+.$ENAME}"

########################################
# make sure the Maildir exists
# but not if it's the root of an INBOX

if [ ! -d "$TARGET/new" ]
then
	if [ "${TARGET: -1}" = "/" ]
	then
		echo "$0: ERROR: cannot create non-existent mailbox"
		exit 1
	else
		maildirmake $TARGET
	fi
fi

if [ ! -d "$TARGET/new" ]
then
	echo "$0: ERROR: Maildir \"$TARGET\" cannot be created"
	exit 1
fi

########################################
# safely add the message to that maildir

NOW=`date +%s`
FILENAME=$NOW.P$$.${HOSTNAME:?$0: ERROR: missing HOSTNAME value}

cat > $TARGET/tmp/$FILENAME
chmod 600 $TARGET/tmp/$FILENAME

mv $TARGET/tmp/$FILENAME $TARGET/new/$FILENAME

########################################
# outta here

exit 0