lsinitrd

   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 $0) [<initramfs file> [<filename>]]" ; exit 1 ; }
  23 image="${1:-/boot/initramfs-$(uname -r).img}"
  24 [[ -f "$image" ]]    || { echo "$image does not exist" ; exit 1 ; }
  25
  26 CAT=zcat
  27 FILE_T=$(file "$image")
  28
  29 if [[ "$FILE_T" =~ ": gzip compressed data" ]]; then
  30     CAT=zcat
  31 elif [[ "$FILE_T" =~ ": xz compressed data" ]]; then
  32     CAT=xzcat
  33 elif [[ "$FILE_T" =~ ": XZ compressed data" ]]; then
  34     CAT=xzcat
  35 elif [[ "$FILE_T" =~ ": data" ]]; then
  36     CAT=lzcat
  37 fi
  38
  39 if [[ $# -eq 2 ]]; then
  40     $CAT $image | cpio --extract --verbose --quiet --to-stdout ${2#/} 2>/dev/null
  41     exit $?
  42 fi
  43
  44 echo "$image:"
  45 echo "========================================================================"
  46 $CAT "$image" | cpio --extract --verbose --quiet --to-stdout 'lib/dracut/dracut-*' 2>/dev/null
  47 echo "========================================================================"
  48 $CAT "$image" | cpio --extract --verbose --quiet --list
  49 echo "========================================================================"