blob: 6b146180b1bea87fa7545254cf564e2c060d06c8 [file] [log] [blame]
#!/bin/bash
set -eo pipefail
help=$'Generate Tarball with SquashFS image and MANIFEST Script
Generates a SquashFS image from the PNOR image
Creates a MANIFEST for image verification
Packages the SquashFS image and MANIFEST together in a tarball
usage: generate-squashfs [OPTION] <PNOR FILE>...
Options:
-f, --file <file> Specify destination file. Defaults to
`pwd`/pnor.squashfs.tar if unspecified.
-h, --help Display this help text and exit.
'
let ffs_entry_size=128
let miscflags_offset=112
outfile=`pwd`"/pnor.squashfs.tar"
declare -a partitions=()
tocfile="pnor.toc"
while [[ $# -gt 0 ]]; do
key="$1"
case $key in
-f|--file)
outfile="$2"
shift 2
;;
-h|--help)
echo "$help"
exit
;;
*)
pnorfile="$1"
shift 1
;;
esac
done
if [ ! -f "${pnorfile}" ]; then
echo "Please enter a valid PNOR file."
echo "$help"
exit 1
fi
scratch_dir=`mktemp -d`
echo "Parsing PNOR TOC..."
# Needed to get the READONLY and PRESERVED flags
# TODO: Get READONLY and PRESERVED flags from pflash instead.
pflash --partition=part --read=${scratch_dir}/part -F ${pnorfile}
pflash --partition=VERSION --read=${scratch_dir}/VERSION -F ${pnorfile}
{
version=$(head -n 1 ${scratch_dir}/VERSION)
echo "version=$version"
extended_version=$(echo $(tail -n +2 ${scratch_dir}/VERSION)|tr ' ' ',')
echo "extended_version=$extended_version"
while read line; do
if [[ $line == "ID="* ]]; then
# This line looks like
# "ID=05 MVPD 000d9000..00169000 (actual=00090000) [ECC]"
read -r -a fields <<< "$line"
# Get any flags attached to end (e.g. [ECC])
flags=""
for flag in "${fields[@]:4}"
do
flags+=",${flag//[\[\]]/}"
done
id=${fields[0]##*=}
offset=$((${ffs_entry_size} * 10#${id} + ${miscflags_offset}))
miscflags=0x$(xxd -p -l 0x1 -seek ${offset} ${scratch_dir}/part)
if ((miscflags & 0x80)); then
flags+=",PRESERVED"
fi
if ((miscflags & 0x40)); then
flags+=",READONLY"
fi
# Need the partition ID, name, start location, end location, and flags
echo "partition${id}=${fields[1]},${fields[2]/../,}${flags}"
# Save the partition name
partitions+=(${fields[1]})
fi
# Don't need part, version, or backup_part partitions
done < <(pflash --info -F ${pnorfile} | grep -v -i "part\|version")
} > ${scratch_dir}/${tocfile}
for partition in "${partitions[@]}"; do
echo "Reading ${partition}..."
pflash --partition=${partition} \
--read=${scratch_dir}/${partition} \
-F ${pnorfile}
done
echo "Creating SquashFS image..."
cd "${scratch_dir}"
mksquashfs ${tocfile} ${partitions[*]} ${scratch_dir}/pnor.xz.squashfs
echo "Creating MANIFEST for the image"
manifest_location="${scratch_dir}/MANIFEST"
echo -e "purpose=host\nversion=$version\n\
extended_version=$extended_version" >> $manifest_location
echo "Generating tarball to contain the SquashFS image and its MANIFEST"
tar -cvf $outfile $manifest_location ${scratch_dir}/pnor.xz.squashfs
echo "SquashFSTarball at ${outfile}"
rm -r "${scratch_dir}"