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lsinitrd.sh: make use of the skipcpio utility 

With the skipcpio utility, the whole contents of an initramfs with an
early cpio image can be displayed.
master
Harald Hoyer 2014-01-24 15:30:22 +01:00
parent b9909e3341
commit b208aad51c
1 changed files with 78 additions and 23 deletions
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101
lsinitrd.sh
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@ -33,6 +33,9 @@ usage()
} >&2
}


[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut

sorted=0
declare -A filenames

@ -103,14 +106,72 @@ if ! [[ -f "$image" ]]; then
exit 1
fi

extract_files()
{
(( ${#filenames[@]} == 1 )) && nofileinfo=1
for f in ${!filenames[@]}; do
[[ $nofileinfo ]] || echo "initramfs:/$f"
[[ $nofileinfo ]] || echo "========================================================================"
$CAT $image | cpio --extract --verbose --quiet --to-stdout $f 2>/dev/null
((ret+=$?))
[[ $nofileinfo ]] || echo "========================================================================"
[[ $nofileinfo ]] || echo
done
}

list_files()
{
echo "========================================================================"
if [ "$sorted" -eq 1 ]; then
$CAT "$image" | cpio --extract --verbose --quiet --list | sort -n -k5
else
$CAT "$image" | cpio --extract --verbose --quiet --list | sort -k9
fi
((ret+=$?))
echo "========================================================================"
}


if (( ${#filenames[@]} <= 0 )); then
echo "Image: $image: $(du -h $image | while read a b; do echo $a;done)"
echo "========================================================================"
fi

read -N 6 bin < "$image"
case $bin in
$'\x71\xc7'*|070701)
CAT="cat --"
is_early=$(cpio --extract --verbose --quiet --to-stdout -- 'early_cpio' < "$image" 2>/dev/null)
if [[ "$is_early" ]]; then
if (( ${#filenames[@]} > 0 )); then
extract_files
else
echo "Early CPIO image"
list_files
fi
SKIP="$dracutbasedir/skipcpio"
if ! [[ -x $SKIP ]]; then
echo
echo "'$SKIP' not found, cannot display remaining contents!" >&2
echo
exit 0
fi
fi
;;
esac

if [[ $SKIP ]]; then
read -N 6 bin < <($SKIP "$image")
fi

case $bin in
$'\x1f\x8b'*)
CAT="zcat --";;
BZh*)
CAT="bzcat --";;
$'\x71\xc7'*|070701)
CAT="cat --";;
CAT="cat --"
;;
$'\x04\x22'*)
CAT="lz4 -d -c";;
*)
@ -121,38 +182,32 @@ case $bin in
;;
esac

skipcpio()
{
$SKIP "$@" | $ORIG_CAT
}

if [[ $SKIP ]]; then
ORIG_CAT="$CAT"
CAT=skipcpio
fi

ret=0

if (( ${#filenames[@]} > 0 )); then
(( ${#filenames[@]} == 1 )) && nofileinfo=1
for f in ${!filenames[@]}; do
[[ $nofileinfo ]] || echo "initramfs:/$f"
[[ $nofileinfo ]] || echo "========================================================================"
$CAT $image | cpio --extract --verbose --quiet --to-stdout $f 2>/dev/null
((ret+=$?))
[[ $nofileinfo ]] || echo "========================================================================"
[[ $nofileinfo ]] || echo
done
extract_files
else
echo "Image: $image: $(du -h $image | while read a b; do echo $a;done)"
echo "========================================================================"
version=$($CAT "$image" | cpio --extract --verbose --quiet --to-stdout -- '*lib/dracut/dracut-*' 2>/dev/null)
version=$($CAT "$image" | cpio --extract --verbose --quiet --to-stdout -- 'lib/dracut/dracut-*' 'usr/lib/dracut/dracut-*' 2>/dev/null)
((ret+=$?))
echo "Version: $version"
echo
echo -n "Arguments: "
$CAT "$image" | cpio --extract --verbose --quiet --to-stdout -- '*lib/dracut/build-parameter.txt' 2>/dev/null
$CAT "$image" | cpio --extract --verbose --quiet --to-stdout -- 'lib/dracut/build-parameter.txt' 'usr/lib/dracut/build-parameter.txt' 2>/dev/null
echo
echo "dracut modules:"
$CAT "$image" | cpio --extract --verbose --quiet --to-stdout -- '*lib/dracut/modules.txt' 2>/dev/null
$CAT "$image" | cpio --extract --verbose --quiet --to-stdout -- 'lib/dracut/modules.txt' 'usr/lib/dracut/modules.txt' 2>/dev/null
((ret+=$?))
echo "========================================================================"
if [ "$sorted" -eq 1 ]; then
$CAT "$image" | cpio --extract --verbose --quiet --list | sort -n -k5
else
$CAT "$image" | cpio --extract --verbose --quiet --list | sort -k9
fi
((ret+=$?))
echo "========================================================================"
list_files
fi

exit $ret