Attachment 5355 Details for Bug 27010 – initrddiff

initrddiff

initrddiff (text/plain), 1.16 KB, created by Alexey Gladkov on 2012-03-04 03:11:37 MSK

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Creator: Alexey Gladkov

Created: 2012-03-04 03:11:37 MSK

Size: 1.16 KB

patch

obsolete

>#!/bin/sh -efu
>
># initrddiff
>#    Perform a diff on the files contained within different initrd
>#    images and show the result.
>
># Usage: initrddiff [diffoptions] <from_image> <to_image>
>#
># diffoptions:
>#    Most of the single letter options allowable by GNU diff(1) are acceptable.
>#    By default -NrU0 is used. If providing a value don't forget the -r option.
>#
># License: GPL
>
>. shell-error
>
>[ -z "${DEBUG-}" ] || set -x
>
>decompress() {
>	local cmd='cat' typ=
>	typ="$(file -b "$1")"
>	case "$typ" in
>		'bzip2 compressed data'*) cmd='bunzip -c' ;;
>		'gzip compressed data'*)  cmd='gunzip -c' ;;
>		'xz compressed data'*)    cmd='unxz -c'   ;;
>	esac
>	$cmd "$1"
>}
>
>extract() {
>	decompress "$1" |
>		cpio -t |
>		sed -e "s,lib/modules/[^/]\+,lib/modules/<version>," |
>		sort
>}
>
>diffopts=
>while [ "$#" -gt 2 ]; do
>	diffopts="$diffopts $1"
>	shift
>done
>
>if [ $# != 2 ]; then
>	printf '%s\n' "Usage: $PROG [diffoptions] <from-image> <to-image>"
>	exit
>fi
>
>for f; do
>	[ -f "$f" ] ||
>		fatal "No such file or directory"
>done
>
>exec 3<<EOF
>`extract "$1"`
>EOF
>exec 4<<EOF
>`extract "$2"`
>EOF
>
>diff ${diffopts:--NrU0} /dev/fd/3 /dev/fd/4 |
>	sed \
>		-e "s,/dev/fd/3,${1##*/}," \
>		-e "s,/dev/fd/4,${2##*/},"

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