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 usage()
  23 {
  24     echo "Usage: $(${0##*/}) [-s] [<initramfs file> [<filename>]]"
  25 }
  26
  27 [[ $# -le 2 ]] || { usage ; exit 1 ; }
  28
  29 sorted=0
  30 while getopts "s" opt; do
  31     case $opt in
  32         s)  sorted=1;;
  33         h)  usage; exit 0;;
  34         \?) usage; exit 1;;
  35     esac
  36 done
  37 shift $((OPTIND-1))
  38
  39 image="${1:-/boot/initramfs-$(uname -r).img}"
  40 [[ -f "$image" ]]    || { echo "$image does not exist" ; exit 1 ; }
  41
  42 CAT=zcat
  43 FILE_T=$(file --dereference "$image")
  44
  45 if echo "test"|xz|xz -dc --single-stream >/dev/null 2>&1; then
  46     XZ_SINGLE_STREAM="--single-stream"
  47 fi
  48
  49 if [[ "$FILE_T" =~ :\ gzip\ compressed\ data ]]; then
  50     CAT=zcat
  51 elif [[ "$FILE_T" =~ :\ xz\ compressed\ data ]]; then
  52     CAT="xzcat $XZ_SINGLE_STREAM"
  53 elif [[ "$FILE_T" =~ :\ XZ\ compressed\ data ]]; then
  54     CAT="xzcat $XZ_SINGLE_STREAM"
  55 elif [[ "$FILE_T" =~ :\ LZMA ]]; then
  56     CAT="xzcat $XZ_SINGLE_STREAM"
  57 elif [[ "$FILE_T" =~ :\ data ]]; then
  58     CAT="xzcat $XZ_SINGLE_STREAM"
  59 fi
  60
  61 if [[ $# -eq 2 ]]; then
  62     $CAT $image | cpio --extract --verbose --quiet --to-stdout ${2#/} 2>/dev/null
  63     exit $?
  64 fi
  65
  66 echo "$image: $(du -h $image | while read a b; do echo $a;done)"
  67 echo "========================================================================"
  68 $CAT "$image" | cpio --extract --verbose --quiet --to-stdout '*lib/dracut/dracut-*' 2>/dev/null
  69 echo "========================================================================"
  70 if [ "$sorted" -eq 1 ]; then
  71     $CAT "$image" | cpio --extract --verbose --quiet --list | sort -n -k5
  72 else
  73     $CAT "$image" | cpio --extract --verbose --quiet --list
  74 fi
  75 echo "========================================================================"