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#!/bin/bash
# mdm.screen - Middleman top-level script (uses screen)
#
# Copyright 2009 Chuan-kai Lin
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
export PATH=MDM_LIB:$PATH
iospec=/dev/null
slaves=6
function usage {
name=`basename $0`
echo >&2 "usage: $name [-c iospec] [-n slaves] cmd ..."
exit 1
}
while getopts c:n: OPTION
do case $OPTION in
c) iospec="$OPTARG" ;;
n) slaves="$OPTARG"
if [ $slaves -lt 1 ]
then echo >&2 "error: must have at least 1 slave"
exit 2
fi ;;
[?]) usage
esac
done
shift $[OPTIND-1]
[ $# -eq 0 ] && usage
function print_screenrc {
echo shell $TMPFILE/shell
echo screen mdm-top $TMPFILE
while [ $slaves -ge 0 ]
do echo screen
slaves=$[slaves-1]
done
echo select 0
}
function write_slave_proxy {
cat <<EOF > $TMPFILE/shell
#!/bin/sh
exec mdm-slave $TMPFILE
EOF
chmod 700 $TMPFILE/shell
}
TMPFILE=`mktemp -d -t mdm-XXXXXXXXXX` || exit 1
print_screenrc > $TMPFILE/screenrc
write_slave_proxy
mdm-master $TMPFILE "$iospec" "$@"
screen -c $TMPFILE/screenrc
cat $TMPFILE/messages
rm -Rf $TMPFILE
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