From a0b85db18e163a14144230ae67c43ac23246b7ea Mon Sep 17 00:00:00 2001

From: Koen Kooi <koen@dominion.thruhere.net>

Date: Thu, 16 Jan 2014 11:00:54 +0100

Subject: [PATCH] dracut-initramfs-restore,lsinitrd: add LZ4 support

Dracut claims to have LZ4 support, but trying to use it will result in an xzcat failure at the end due to missing CAT support.

The lz4 command chokes on '--', so abstract that out into the CAT select.

Something similar will need to be done for LZO.

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>

---

 dracut-initramfs-restore.sh |  2 ++

 lsinitrd.sh                 | 22 ++++++++++++----------

 2 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/dracut-initramfs-restore.sh b/dracut-initramfs-restore.sh

index ec5fe18..f29c814 100644

--- a/dracut-initramfs-restore.sh

+++ b/dracut-initramfs-restore.sh

@@ -20,6 +20,8 @@ if zcat "$IMG"  | cpio -id --quiet >/dev/null; then

     rm -f -- .need_shutdown

 elif xzcat "$IMG"  | cpio -id --quiet >/dev/null; then

     rm -f -- .need_shutdown

+elif lz4 -d -c "$IMG"  | cpio -id --quiet >/dev/null; then

+    rm -f -- .need_shutdown

 else

     # something failed, so we clean up

     echo "Unpacking of $IMG to /run/initramfs failed" >&2

diff --git a/lsinitrd.sh b/lsinitrd.sh

index 584c29a..f9f243b 100755

--- a/lsinitrd.sh

+++ b/lsinitrd.sh

@@ -106,15 +106,17 @@ fi

 read -N 6 bin < "$image"

 case $bin in

     $'\x1f\x8b'*)

-        CAT="zcat";;

+        CAT="zcat --";;

     BZh*)

-        CAT="bzcat";;

+        CAT="bzcat --";;

     $'\x71\xc7'*|070701)

-        CAT="cat";;

+        CAT="cat --";;

+    $'\x04\x22'*)

+        CAT="lz4 -d -c";;

     *)

-        CAT="xzcat";

+        CAT="xzcat --";

         if echo "test"|xz|xzcat --single-stream >/dev/null 2>&1; then

-            CAT="xzcat --single-stream"

+            CAT="xzcat --single-stream --"

         fi

         ;;

 esac

@@ -126,7 +128,7 @@ if (( ${#filenames[@]} > 0 )); then

     for f in ${!filenames[@]}; do

         [[ $nofileinfo ]] || echo "initramfs:/$f"

         [[ $nofileinfo ]] || echo "========================================================================"

-        $CAT -- $image | cpio --extract --verbose --quiet --to-stdout $f 2>/dev/null

+        $CAT $image | cpio --extract --verbose --quiet --to-stdout $f 2>/dev/null

         ((ret+=$?))

         [[ $nofileinfo ]] || echo "========================================================================"

         [[ $nofileinfo ]] || echo

@@ -134,16 +136,16 @@ if (( ${#filenames[@]} > 0 )); then

 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-*' 2>/dev/null)

     ((ret+=$?))

     echo "$version with 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' 2>/dev/null

     ((ret+=$?))

     echo "========================================================================"

     if [ "$sorted" -eq 1 ]; then

-        $CAT -- "$image" | cpio --extract --verbose --quiet --list | sort -n -k5

+        $CAT "$image" | cpio --extract --verbose --quiet --list | sort -n -k5

     else

-        $CAT -- "$image" | cpio --extract --verbose --quiet --list | sort -k9

+        $CAT "$image" | cpio --extract --verbose --quiet --list | sort -k9

     fi

     ((ret+=$?))

     echo "========================================================================"