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- #!/bin/sh
- if [ "`id -u`" != "0" ]; then
- exec sudo $0 $*
- fi
- set -e
- FILENAME=$1
- ROOT_SIZE=$2
- SWAP_SIZE=$[ 1024 ]
- if [ -z "$ROOT_SIZE" -o -z "$FILENAME" ]; then
- echo "Usage: $0 <filename> <root.img size in MB>"
- exit 1
- fi
- if [ -e "$FILENAME" ]; then
- echo "$FILENAME already exists, not overriding"
- exit 1
- fi
- TOTAL_SIZE=$[ $ROOT_SIZE + $SWAP_SIZE + 512 ]
- truncate -s ${TOTAL_SIZE}M "$FILENAME"
- sfdisk --no-reread -u M "$FILENAME" > /dev/null 2> /dev/null <<EOF
- 0,${SWAP_SIZE},S
- ,${ROOT_SIZE},L
- EOF
- kpartx -s -a "$FILENAME"
- loopdev=`losetup -j "$FILENAME"|tail -n 1 |cut -d: -f1`
- looppart=`echo $loopdev|sed 's:dev:dev/mapper:'`
- mkswap -f ${looppart}p1 > /dev/null
- kpartx -s -d ${loopdev}
- losetup -d ${loopdev} || :
- chown --reference `dirname "$FILENAME"` "$FILENAME"
|
