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From 815b9c16a4e90b67bab008da678d73faa74f8e0c Mon Sep 17 00:00:00 2001
From: Harald Hoyer <harald@redhat.com>
Date: Fri, 24 Jan 2014 15:30:22 +0100
Subject: [PATCH] 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.
---
lsinitrd.sh | 96 +++++++++++++++++++++++++++++++++++++++++++++++--------------
1 file changed, 75 insertions(+), 21 deletions(-)
diff --git a/lsinitrd.sh b/lsinitrd.sh
index f9f243bb..70e12f81 100755
--- a/lsinitrd.sh
+++ b/lsinitrd.sh
@@ -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";;
*)
@@ -121,34 +182,27 @@ 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 with dracut modules:"
$CAT "$image" | cpio --extract --verbose --quiet --to-stdout -- '*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