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 dwarning() {
  20     echo "Warning: $*" >&2
  21 }
  22
  23 dinfo() {
  24     [[ $beverbose ]] && echo "$@" >&2
  25 }
  26
  27 derror() {
  28     echo "Error: $*" >&2
  29 }
  30
  31 usage() {
  32     #                                                   80x25 linebreak here ^
  33     cat << EOF
  34 Usage: $0 [OPTION]... <initramfs> <base image> [<image>...]
  35 Creates initial ramdisk image by concatenating several images from the command
  36 line and /boot/dracut/
  37
  38   -f, --force           Overwrite existing initramfs file.
  39   -i, --imagedir        Directory with additional images to add
  40                         (default: /boot/dracut/)
  41   -o, --overlaydir      Overlay directory, which contains files that
  42                         will be used to create an additional image
  43   --nooverlay           Do not use the overlay directory
  44   --noimagedir          Do not use the additional image directory
  45   -h, --help            This message
  46   --debug               Output debug information of the build process
  47   -v, --verbose         Verbose output during the build process
  48 EOF
  49 }
  50
  51 imagedir=/boot/dracut/
  52 overlay=/var/lib/dracut/overlay
  53
  54 while (($# > 0)); do
  55     case $1 in
  56         -f | --force) force=yes ;;
  57         -i | --imagedir)
  58             imagedir=$2
  59             shift
  60             ;;
  61         -o | --overlaydir)
  62             overlay=$2
  63             shift
  64             ;;
  65         --nooverlay)
  66             no_overlay=yes
  67             shift
  68             ;;
  69         --noimagedir)
  70             no_imagedir=yes
  71             shift
  72             ;;
  73         -h | --help)
  74             usage
  75             exit 1
  76             ;;
  77         --debug) export debug="yes" ;;
  78         -v | --verbose) beverbose="yes" ;;
  79         -*)
  80             printf "\nUnknown option: %s\n\n" "$1" >&2
  81             usage
  82             exit 1
  83             ;;
  84         *) break ;;
  85     esac
  86     shift
  87 done
  88
  89 outfile=$1
  90 shift
  91
  92 if [[ -z $outfile ]]; then
  93     derror "No output file specified."
  94     usage
  95     exit 1
  96 fi
  97
  98 baseimage=$1
  99 shift
 100
 101 if [[ -z $baseimage ]]; then
 102     derror "No base image specified."
 103     usage
 104     exit 1
 105 fi
 106
 107 if [[ -f $outfile && ! $force ]]; then
 108     derror "Will not override existing initramfs ($outfile) without --force"
 109     exit 1
 110 fi
 111
 112 if [[ ! $no_imagedir && ! -d $imagedir ]]; then
 113     derror "Image directory $overlay is not a directory"
 114     exit 1
 115 fi
 116
 117 if [[ ! $no_overlay && ! -d $overlay ]]; then
 118     derror "Overlay $overlay is not a directory"
 119     exit 1
 120 fi
 121
 122 if [[ ! $no_overlay ]]; then
 123     ofile="$imagedir/90-overlay.img"
 124     dinfo "Creating image $ofile from directory $overlay"
 125     type pigz &> /dev/null && gzip=pigz || gzip=gzip
 126     (
 127         cd "$overlay" || return 1
 128         find . | cpio --quiet -H newc -o | $gzip -9 > "$ofile"
 129     )
 130 fi
 131
 132 if [[ ! $no_imagedir ]]; then
 133     for i in "$imagedir/"*.img; do
 134         [[ -f $i ]] && images+=("$i")
 135     done
 136 fi
 137
 138 images+=("$@")
 139
 140 dinfo "Using base image $baseimage"
 141 cat -- "$baseimage" > "$outfile"
 142
 143 for i in "${images[@]}"; do
 144     dinfo "Appending $i"
 145     cat -- "$i" >> "$outfile"
 146 done
 147
 148 dinfo "Created $outfile"
 149
 150 exit 0