dracut-catimages.sh

   1 #!/bin/bash --norc
   2 #
   3 # Copyright 2009 Red Hat, Inc.  All rights reserved.
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 #
  18
  19
  20 dwarning() {
  21     echo "Warning: $@" >&2
  22 }
  23
  24 dinfo() {
  25     [[ $beverbose ]] && echo "$@" >&2
  26 }
  27
  28 derror() {
  29     echo "Error: $@" >&2
  30 }
  31
  32 usage() {
  33 #                                                       80x25 linebreak here ^
  34     cat << EOF
  35 Usage: $0 [OPTION]... <initramfs> <base image> [<image>...]
  36 Creates initial ramdisk image by concatenating several images from the command
  37 line and /boot/dracut/
  38
  39   -f, --force           Overwrite existing initramfs file.
  40   -i, --imagedir        Directory with additional images to add
  41                         (default: /boot/dracut/)
  42   -o, --overlaydir      Overlay directory, which contains files that
  43                         will be used to create an additional image
  44   --nooverlay           Do not use the overlay directory
  45   --noimagedir          Do not use the additional image directory
  46   -h, --help            This message
  47   --debug               Output debug information of the build process
  48   -v, --verbose         Verbose output during the build process
  49 EOF
  50 }
  51
  52
  53 imagedir=/boot/dracut/
  54 overlay=/var/lib/dracut/overlay
  55
  56 while (($# > 0)); do
  57     case $1 in
  58         -f|--force) force=yes;;
  59         -i|--imagedir) imagedir=$2;shift;;
  60         -o|--overlaydir) overlay=$2;shift;;
  61         --nooverlay) no_overlay=yes;shift;;
  62         --noimagedir) no_imagedir=yes;shift;;
  63         -h|--help) usage; exit 1 ;;
  64         --debug) debug="yes";;
  65         -v|--verbose) beverbose="yes";;
  66         -*) printf "\nUnknown option: %s\n\n" "$1" >&2; usage; exit 1;;
  67         *) break ;;
  68     esac
  69     shift
  70 done
  71
  72 outfile=$1; shift
  73
  74 if [[ -z $outfile ]]; then
  75     derror "No output file specified."
  76     usage
  77     exit 1
  78 fi
  79
  80 baseimage=$1; shift
  81
  82 if [[ -z $baseimage ]]; then
  83     derror "No base image specified."
  84     usage
  85     exit 1
  86 fi
  87
  88 if [[ -f $outfile && ! $force ]]; then
  89     derror "Will not override existing initramfs ($outfile) without --force"
  90     exit 1
  91 fi
  92
  93 if [[ ! $no_imagedir && ! -d $imagedir ]]; then
  94     derror "Image directory $overlay is not a directory"
  95     exit 1
  96 fi
  97
  98 if [[ ! $no_overlay && ! -d $overlay ]]; then
  99     derror "Overlay $overlay is not a directory"
 100     exit 1
 101 fi
 102
 103 if [[ ! $no_overlay ]]; then
 104     ofile="$imagedir/90-overlay.img"
 105     dinfo "Creating image $ofile from directory $overlay"
 106     type pigz &>/dev/null && gzip=pigz || gzip=gzip
 107     ( cd "$overlay"; find . |cpio --quiet -H newc -o |$gzip -9 > "$ofile"; )
 108 fi
 109
 110 if [[ ! $no_imagedir ]]; then
 111     for i in "$imagedir/"*.img; do
 112         [[ -f $i ]] && images+=("$i")
 113     done
 114 fi
 115
 116 images+=($@)
 117
 118 dinfo "Using base image $baseimage"
 119 cat -- "$baseimage" > "$outfile"
 120
 121 for i in "${images[@]}"; do
 122     dinfo "Appending $i"
 123     cat -- "$i" >> "$outfile"
 124 done
 125
 126 dinfo "Created $outfile"
 127
 128 exit 0