41 lines
653 B
Bash
41 lines
653 B
Bash
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#!/bin/sh
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#
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# Copyright (C) Sebastian Philipp
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#
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set -e
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swapsize="$1"
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swapname="$2"
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if [ -z "$swapsize" -o -z "$swapname" ]
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then
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cat <<EOF
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Usage: $0 <size> <file>
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size: the size of the file, like "8G"
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file: path to the new swap file. This file should not exists.
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EOF
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exit 1
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fi
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if [ -e $swapname ]
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then
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echo "error: File already exists. $swapname"
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exit 1
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fi
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swapfile=$(losetup -f) #free loop device
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# set NOCOW
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#touch $swapname
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fallocate -l "$swapsize" "$swapname"
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chmod 0600 $swapname
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chattr +C $swapname
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#head -c $swapsize /dev/zero >> $swapname
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losetup $swapfile $swapname #mount file to loop
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mkswap $swapfile
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swapon $swapfile
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