mount-img.sh

#!/usr/bin/env bash

# Copyright (c) 2019, University of Kaiserslautern
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# 1. Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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#    documentation and/or other materials provided with the distribution.
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#    this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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# Author: Éder F. Zulian

DIR="$(cd "$(dirname "$0")" && pwd)"
TOPDIR="$DIR/.."
source $TOPDIR/common/defaults.in
source $TOPDIR/common/util.in

usage="Usage: $(basename "$0") {-h | FILE }
Mount a disk image.
	-h    display this help and exit
	FILE  disk image file"

if [ "$#" != "1" ]; then
	echo "$usage"
	exit 1
fi

if [ $1 = "-h" ]; then
	echo "$usage"
	exit 0
fi

img="$1"

if [ ! -e $img ]; then
	printf "\n${Red}Error. File \"$img\" not found.${NC}\n\n"
	echo "$usage"
	exit 1
fi

printf "${Yellow}Salutations! You are using gem5.TnT!${NC}\n"
echo "file: $img"
dev=`sudo fdisk -l $img | tail -1 | awk '{ print $1 }'`
startsector=`sudo fdisk -l $img | grep $dev | awk '{ print $2 }'`
echo "start sector: $startsector"
sectorsize=`sudo fdisk -l $img | grep ^Units | awk '{ print $8 }'`
echo "sector size: $sectorsize"
ldev=`sudo losetup -f`
echo "loop device: $ldev"
offset=$(($startsector*$sectorsize))
echo "offset: $offset"
sudo losetup -o $offset $ldev $img
tdir=`mktemp -d`
sudo mount $ldev $tdir
printf "${Yellow}Mounted at ${Green}$tdir${NC}\n"
umcmd="sudo umount $tdir && sudo losetup --detach $ldev"
printf "${Yellow}Command to unmount: ${Green}$umcmd${NC}\n"