34 lines
911 B
Bash
34 lines
911 B
Bash
#!/bin/sh -eux
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# Whiteout root
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count=$(df --sync -kP / | tail -n1 | awk -F ' ' '{print $4}')
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count=$(($count-1))
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dd if=/dev/zero of=/tmp/whitespace bs=1M count=$count || echo "dd exit code $? is suppressed"
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rm /tmp/whitespace
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# Whiteout /boot
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count=$(df --sync -kP /boot | tail -n1 | awk -F ' ' '{print $4}')
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count=$(($count-1))
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dd if=/dev/zero of=/boot/whitespace bs=1M count=$count || echo "dd exit code $? is suppressed"
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rm /boot/whitespace
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set +e
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swapuuid="`/sbin/blkid -o value -l -s UUID -t TYPE=swap`"
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case "$?" in
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2|0) ;;
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*) exit 1 ;;
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esac
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set -e
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if [ "x${swapuuid}" != "x" ]
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then
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# Whiteout the swap partition to reduce box size
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# Swap is disabled till reboot
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swappart="`readlink -f /dev/disk/by-uuid/$swapuuid`"
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/sbin/swapoff "$swappart"
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dd if=/dev/zero of="$swappart" bs=1M || echo "dd exit code $? is suppressed"
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/sbin/mkswap -U "$swapuuid" "$swappart"
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fi
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sync
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