8d0863d40f
This makes possible to release d-m partitions devices sooner (so avoid race with kpartx).
38 lines
779 B
Bash
Executable File
38 lines
779 B
Bash
Executable File
#!/bin/sh
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if [ "`id -u`" != "0" ]; then
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exec sudo $0 $*
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fi
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set -e
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FILENAME=$1
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ROOT_SIZE=$2
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SWAP_SIZE=$[ 1024 ]
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if [ -z "$ROOT_SIZE" -o -z "$FILENAME" ]; then
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echo "Usage: $0 <filename> <root.img size in MB>"
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exit 1
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fi
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if [ -e "$FILENAME" ]; then
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echo "$FILENAME already exists, not overriding"
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exit 1
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fi
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TOTAL_SIZE=$[ $ROOT_SIZE + $SWAP_SIZE + 512 ]
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truncate -s ${TOTAL_SIZE}M "$FILENAME"
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sfdisk --no-reread -u M "$FILENAME" > /dev/null 2> /dev/null <<EOF
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0,${SWAP_SIZE},S
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,${ROOT_SIZE},L
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EOF
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kpartx -s -a "$FILENAME"
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loopdev=`losetup -j "$FILENAME"|tail -n 1 |cut -d: -f1`
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looppart=`echo $loopdev|sed 's:dev:dev/mapper:'`
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mkswap -f ${looppart}p1 > /dev/null
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sync
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kpartx -s -d ${loopdev}
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losetup -d ${loopdev} || :
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chown --reference `dirname "$FILENAME"` "$FILENAME"
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