dracut-catimages.sh

   1 #!/bin/bash --norc
   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 2009 Red Hat, Inc.  All rights reserved.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21
  22 dwarning() {
  23     echo "Warning: $@" >&2
  24 }
  25
  26 dinfo() {
  27     [[ $beverbose ]] && echo "$@" >&2
  28 }
  29
  30 derror() {
  31     echo "Error: $@" >&2
  32 }
  33
  34 usage() {
  35 #                                                       80x25 linebreak here ^
  36     cat << EOF
  37 Usage: $0 [OPTION]... <initramfs> <base image> [<image>...]
  38 Creates initial ramdisk image by concatenating several images from the command
  39 line and /boot/dracut/
  40
  41   -f, --force           Overwrite existing initramfs file.
  42   -i, --imagedir        Directory with additional images to add
  43                         (default: /boot/dracut/)
  44   -o, --overlaydir      Overlay directory, which contains files that
  45                         will be used to create an additional image
  46   --nooverlay           Do not use the overlay directory
  47   --noimagedir          Do not use the additional image directory
  48   -h, --help            This message
  49   --debug               Output debug information of the build process
  50   -v, --verbose         Verbose output during the build process
  51 EOF
  52 }
  53
  54
  55 imagedir=/boot/dracut/
  56 overlay=/var/lib/dracut/overlay
  57
  58 while (($# > 0)); do
  59     case $1 in
  60         -f|--force) force=yes;;
  61         -i|--imagedir) imagedir=$2;shift;;
  62         -o|--overlaydir) overlay=$2;shift;;
  63         --nooverlay) no_overlay=yes;shift;;
  64         --noimagedir) no_imagedir=yes;shift;;
  65         -h|--help) usage; exit 1 ;;
  66         --debug) debug="yes";;
  67         -v|--verbose) beverbose="yes";;
  68         -*) printf "\nUnknown option: %s\n\n" "$1" >&2; usage; exit 1;;
  69         *) break ;;
  70     esac
  71     shift
  72 done
  73
  74 outfile=$1; shift
  75
  76 if [[ -z $outfile ]]; then
  77     derror "No output file specified."
  78     usage
  79     exit 1
  80 fi
  81
  82 baseimage=$1; shift
  83
  84 if [[ -z $baseimage ]]; then
  85     derror "No base image specified."
  86     usage
  87     exit 1
  88 fi
  89
  90 if [[ -f $outfile && ! $force ]]; then
  91     derror "Will not override existing initramfs ($outfile) without --force"
  92     exit 1
  93 fi
  94
  95 if [[ ! $no_imagedir && ! -d $imagedir ]]; then
  96     derror "Image directory $overlay is not a directory"
  97     exit 1
  98 fi
  99
 100 if [[ ! $no_overlay && ! -d $overlay ]]; then
 101     derror "Overlay $overlay is not a directory"
 102     exit 1
 103 fi
 104
 105 if [[ ! $no_overlay ]]; then
 106     ofile="$imagedir/90-overlay.img"
 107     dinfo "Creating image $ofile from directory $overlay"
 108     type pigz &>/dev/null && gzip=pigz || gzip=gzip
 109     ( cd "$overlay"; find . |cpio --quiet -H newc -o |$gzip -9 > "$ofile"; )
 110 fi
 111
 112 if [[ ! $no_imagedir ]]; then
 113     for i in "$imagedir/"*.img; do
 114         [[ -f $i ]] && images+=("$i")
 115     done
 116 fi
 117
 118 images+=($@)
 119
 120 dinfo "Using base image $baseimage"
 121 cat "$baseimage" > "$outfile"
 122
 123 for i in "${images[@]}"; do
 124     dinfo "Appending $i"
 125     cat "$i" >> "$outfile"
 126 done
 127
 128 dinfo "Created $outfile"
 129
 130 exit 0