Linux Swap Space Mini-HOWTO: The swaphalt.sh script

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## 10. The swaphalt.sh script

This script first checks the Linux swap signature and then restores the Windows file system on it.

(Adapted from the original Swap-Space-HOWTO by H. Peter Anvin)

> `

>     #!/bin/sh
>     #
>     # swaphalt.sh   This file is executed through the /etc/rc.d/init.d/halt
>     #               script after swapping and accounting has been turned off.
>     #
>     # Author:       Rahul U. Joshi
>     #

>     # check swap partition signature and restore Windows swap info

>     loopcount=0

>     # flag to indicate whether the swap info has been restored or not
>     restored=0

>     # check for swap signature 3 times before giving up
>     while [ $loopcount -lt 3 ]
>       do

>       if [ "`/bin/dd 2>/dev/null if=/dev/winswap bs=1 count=10 skip=4086`" = 'SWAP-SPACE' ]; then
>         echo "Restoring DOS/Windows swap info , iteration $loopcount"
>         /bin/zcat /etc/winswap.gz  >  /dev/winswap
>         restored=1
>         break
>       else
>         loopcount=loopcount+1
>       fi

>       done

>     if [ $restored -ne 1 ] ; then
>        echo "Swap signature not found after $loopcount tries"
>        echo "Skipping restoring"
>     fi

> `

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