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     {
  25         echo "Usage: ${0##*/} [-s] [<initramfs file> [<filename>]]"
  26         echo
  27         echo "-h, --help     print a help message and exit."
  28         echo "-s, --size     sort the contents of the initramfs by size."
  29         echo
  30     } >&2
  31 }
  32
  33 [[ $# -le 2 ]] || { usage ; exit 1 ; }
  34
  35 sorted=0
  36 while getopts "s" opt; do
  37     case $opt in
  38         s)  sorted=1;;
  39         h)  usage; exit 0;;
  40         \?) usage; exit 1;;
  41     esac
  42 done
  43 shift $((OPTIND-1))
  44
  45 KERNEL_VERSION="$(uname -r)"
  46
  47 if [[ "$1" ]]; then
  48     image="$1"
  49     if ! [[ -f "$image" ]]; then
  50         {
  51             echo "$image does not exist"
  52             echo
  53         } >&2
  54         usage
  55         exit 1
  56     fi
  57 else
  58     [[ -f /etc/machine-id ]] && read MACHINE_ID < /etc/machine-id
  59
  60     if [[ $MACHINE_ID ]] && ( [[ -d /boot/${MACHINE_ID} ]] || [[ -L /boot/${MACHINE_ID} ]] ); then
  61         image="/boot/${MACHINE_ID}/${KERNEL_VERSION}/initrd"
  62     else
  63         image="/boot/initramfs-${KERNEL_VERSION}.img"
  64     fi
  65 fi
  66
  67
  68 if ! [[ -f "$image" ]]; then
  69     {
  70         echo "No <initramfs file> specified and the default image '$image' cannot be accessed!"
  71         echo
  72     } >&2
  73     usage
  74     exit 1
  75 fi
  76
  77 CAT=zcat
  78 FILE_T=$(file --dereference "$image")
  79
  80 if echo "test"|xz|xz -dc --single-stream >/dev/null 2>&1; then
  81     XZ_SINGLE_STREAM="--single-stream"
  82 fi
  83
  84 if [[ "$FILE_T" =~ :\ gzip\ compressed\ data ]]; then
  85     CAT=zcat
  86 elif [[ "$FILE_T" =~ :\ xz\ compressed\ data ]]; then
  87     CAT="xzcat $XZ_SINGLE_STREAM"
  88 elif [[ "$FILE_T" =~ :\ XZ\ compressed\ data ]]; then
  89     CAT="xzcat $XZ_SINGLE_STREAM"
  90 elif [[ "$FILE_T" =~ :\ LZMA ]]; then
  91     CAT="xzcat $XZ_SINGLE_STREAM"
  92 elif [[ "$FILE_T" =~ :\ data ]]; then
  93     CAT="xzcat $XZ_SINGLE_STREAM"
  94 fi
  95
  96 if [[ $# -eq 2 ]]; then
  97     $CAT $image | cpio --extract --verbose --quiet --to-stdout ${2#/} 2>/dev/null
  98     exit $?
  99 fi
 100
 101 echo "$image: $(du -h $image | while read a b; do echo $a;done)"
 102 echo "========================================================================"
 103 $CAT "$image" | cpio --extract --verbose --quiet --to-stdout '*lib/dracut/dracut-*' 2>/dev/null
 104 echo "========================================================================"
 105 if [ "$sorted" -eq 1 ]; then
 106     $CAT "$image" | cpio --extract --verbose --quiet --list | sort -n -k5
 107 else
 108     $CAT "$image" | cpio --extract --verbose --quiet --list | sort -k9
 109 fi
 110 echo "========================================================================"