dracut-catimages

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