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 f9f243b..70e12f8 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