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#!/bin/bash
# handle the case when using files for logging instead of
# real devices (with kvm, for example)
DD_OPTS="conv=notrunc"
if [ ! $# -eq 1 ]; then
echo "Usage: $0 <dev>"
exit 1
elif mount|fgrep -q $1; then
echo Device appears to be mounted - aborting
exit 1
else
dd if=/dev/zero of=$1 bs=1M count=1 $DD_OPTS
# The funky formatting is actually needed!
UUID=`head -c4 /dev/urandom |hexdump -e '/4 "%08x"'`
echo > /tmp/$UUID
echo 'Linux blockconsole version 1.1' >> /tmp/$UUID
echo "$UUID" >> /tmp/$UUID
echo 00000000 >> /tmp/$UUID
echo 00000000 >> /tmp/$UUID
for i in `seq 452`; do echo -n " " >> /tmp/$UUID; done
echo >> /tmp/$UUID
dd if=/tmp/$UUID of=$1 $DD_OPTS
rm /tmp/$UUID
sync
exit 0
fi
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