lsinitrd.sh

   1 #!/bin/bash
   2 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
   3 # ex: ts=8 sw=4 sts=4 et filetype=sh
   4 #
   5 # Copyright 2005-2010 Harald Hoyer <harald@redhat.com>
   6 # Copyright 2005-2010 Red Hat, Inc.  All rights reserved.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 #
  21
  22 [[ $# -le 2 ]] || { echo "Usage: $(basename $0) [-s] [<initramfs file> [<filename>]]" ; exit 1 ; }
  23
  24 sorted=0
  25 while getopts "s" opt; do
  26     case $opt in
  27         s)  sorted=1;;
  28         \?) exit 1;;
  29     esac
  30 done
  31 shift $((OPTIND-1))
  32
  33 image="${1:-/boot/initramfs-$(uname -r).img}"
  34 [[ -f "$image" ]]    || { echo "$image does not exist" ; exit 1 ; }
  35
  36 CAT=zcat
  37 FILE_T=$(file --dereference "$image")
  38
  39 if echo "test"|xz|xz -dc --single-stream >/dev/null 2>&1; then
  40     XZ_SINGLE_STREAM="--single-stream"
  41 fi
  42
  43 if [[ "$FILE_T" =~ :\ gzip\ compressed\ data ]]; then
  44     CAT=zcat
  45 elif [[ "$FILE_T" =~ :\ xz\ compressed\ data ]]; then
  46     CAT="xzcat $XZ_SINGLE_STREAM"
  47 elif [[ "$FILE_T" =~ :\ XZ\ compressed\ data ]]; then
  48     CAT="xzcat $XZ_SINGLE_STREAM"
  49 elif [[ "$FILE_T" =~ :\ LZMA ]]; then
  50     CAT="xzcat $XZ_SINGLE_STREAM"
  51 elif [[ "$FILE_T" =~ :\ data ]]; then
  52     CAT="xzcat $XZ_SINGLE_STREAM"
  53 fi
  54
  55 if [[ $# -eq 2 ]]; then
  56     $CAT $image | cpio --extract --verbose --quiet --to-stdout ${2#/} 2>/dev/null
  57     exit $?
  58 fi
  59
  60 echo "$image: $(du -h $image | awk '{print $1}')"
  61 echo "========================================================================"
  62 $CAT "$image" | cpio --extract --verbose --quiet --to-stdout 'lib/dracut/dracut-*' 2>/dev/null
  63 echo "========================================================================"
  64 if [ "$sorted" -eq 1 ]; then
  65     $CAT "$image" | cpio --extract --verbose --quiet --list | sort -n -k5
  66 else
  67     $CAT "$image" | cpio --extract --verbose --quiet --list
  68 fi
  69 echo "========================================================================"