41 lines
1.1 KiB
Bash
Executable File
41 lines
1.1 KiB
Bash
Executable File
#!/bin/bash
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#
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# This should work with almost any image that uses MBR partitioning and doesn't already
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# have 3 or more partitions.
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set -e
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log() {
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echo "`basename $0`: $@"
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}
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usage() {
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[[ -z "$1" ]] || echo -e "USAGE ERROR: $@\n"
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echo "`basename $0`: IMAGEFILE DEVICE"
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echo " - This script images DEVICE with IMAGEFILE"
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exit 1
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}
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IMAGEFILE="$1"
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DEVICE="$2"
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[[ -f $IMAGEFILE ]] || usage "$IMAGEFILE (IMAGEFILE) is not a file"
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[[ -b $DEVICE ]] || usage "$DEVICE (DEVICE) is not a block device"
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# In production this will be replaced with secure erasing the drives
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# For now we need to ensure there aren't any old (GPT) partitions on the drive
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log "Erasing existing mbr from ${DEVICE}"
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dd if=/dev/zero of=$DEVICE bs=512 count=10
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## Doing two steps allows us to use dd, which allows us to tweak things like
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## blocksize and allows use of direct io
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# Converts image to raw
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log "Imaging $IMAGEFILE to RAW format"
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qemu-img convert -O raw $IMAGEFILE /tmp/image.raw
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# Write image onto device
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log "Imaging $DEVICE"
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dd if=/tmp/image.raw of=$DEVICE bs=64K oflag=direct
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log "${DEVICE} imaged successfully!"
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