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#!/bin/sh
#set -e
Swapon ()
{
_DEVICES="/dev/sd* /dev/vd*"
if [ -e /run ]
then
# wheezy
_FSTAB="/root/etc/fstab.d/swap"
else
# squeeze
_FSTAB="/root/etc/fstab"
fi
for _DEVICE in ${_DEVICES}
do
if [ ! -b "${_DEVICE}" ]
then
continue
fi
blkid -o udev -p ${_DEVICE%%[0-9]*} | grep -q "^ID_FS_USAGE=raid" && continue
_MAGIC="$(/bin/dd if=${_DEVICE} bs=4086 skip=1 count=1 2>/dev/null | /bin/dd bs=10 count=1 2>/dev/null)" || continue
case "${_MAGIC}" in
SWAPSPACE2|SWAP-SPACE)
_SWAP_DEVICES="${_SWAP_DEVICES} ${_DEVICE}"
;;
esac
done
# Remove all auto swap entries
if grep -qs "swap swap" "${_FSTAB}"
then
grep -v "swap swap" "${_FSTAB}" > "${_FSTAB}".tmp
mv "${_FSTAB}".tmp "${_FSTAB}"
fi
# Add new swap entries
for _DEVICE in _SWAP_DEVICES
do
echo "${_DEVICE} swap swap defaults 0 0" >> "${_FSTAB}"
done
}
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