51 lines
1.1 KiB
Bash
Executable File
51 lines
1.1 KiB
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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if ! echo $PATH | grep -q sbin; then
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PATH=$PATH:/sbin:/usr/sbin
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fi
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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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,${ROOT_SIZE},L
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EOF
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loopdev=`losetup -f --show --partscan "$FILENAME"`
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udevadm settle
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created=
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if [ ! -e ${loopdev}p1 ]; then
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# device wasn't created automatically, probably udev isn't running;
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# create devs manually
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for partdev in /sys/block/$(basename ${loopdev})/loop*p*; do
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mknod /dev/$(basename ${partdev}) b $(cat ${partdev}/dev | tr : ' ')
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done
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created=yes
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fi
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mkswap -f ${loopdev}p1 > /dev/null
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if [ "$created" = "yes" ]; then
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rm -f ${loopdev}p*
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fi
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losetup -d ${loopdev} || :
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chown --reference `dirname "$FILENAME"` "$FILENAME"
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