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#!/bin/sh
# copyright 2006 Vagrant Cascadian <vagrant@freegeek.org>, distributed under
# the terms of the GNU General Public License version 2 or any later version.
# generates a swap file and configures nbd-server to export it
# to stdout. should usually be run from an inetd.
# default swapfile size (in MB)
SIZE=32
# default to running mkswap
RUN_MKSWAP=true
if [ -f /etc/ltsp/nbdswapd.conf ]; then
. /etc/ltsp/nbdswapd.conf
fi
if [ -n "$SWAPDIR" ]; then
if [ -d "$SWAPDIR" ] && [ -w "$SWAPDIR" ]; then
TEMPFILE_OPTS="-d $SWAPDIR"
else
echo "ERROR: not a directory or not writeable: $SWAPDIR" > /dev/stderr
exit 1
fi
fi
if [ -z "$SWAP" ]; then
SWAP=$(tempfile $TEMPFILE_OPTS)
fi
# generate the swap file
dd if=/dev/zero of=$SWAP bs=1024k count=$SIZE 2> /dev/null
if [ "$RUN_MKSWAP" = "true" ]; then
/sbin/mkswap $SWAP > /dev/null 2>&1
fi
# start the swap server
/bin/nbd-server 0 $SWAP $NBD_SERVER_OPTS
# clean up the swap file
rm -f $SWAP
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