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Ein DVD Image aus CD ISO Dateien erstellen

Das folgende Script (mkdvdiso.sh) wurde unter CentOS 4 und 5 i386 getestet und ermöglicht es Ihnen ein DVD Image aus vorhandenen CD ISO Dateien oder einem CentOS Installationsverzeichnis zu erstellen.

Um ein DVD Image aus einem Installationsverzeichnis erstellen zu können muss dieses allerdings zwingend eine .discinfo Datei enthalten die Sie bei Bedarf aus dem Wurzelverzeichnis einer CentOS CD dorthin kopieren können.

Anwendungsbeispiel: mkdvdiso.sh Quelle /Pfad/zur/DVD.iso

• Bei der 'Quelle' kann es sich wahlweise um ein Verzeichnis mit CD ISO Dateien oder ein Installationsverzeichnis handeln (wie er z.B. auf den CentOS FTP Servern zu finden ist).

# by Chris Kloiber <ckloiber@redhat.com>
# Mods under CentOS by Phil Schaffner <p.r.schaffner@ieee.org>

# A quick hack that will create a bootable DVD iso of a Red Hat Linux
# Distribution. Feed it either a directory containing the downloaded
# iso files of a distribution, or point it at a directory containing
# the "RedHat", "isolinux", and "images" directories.

# This version only works with "isolinux" based Red Hat Linux versions.

# Lots of disk space required to work, 3X the distribution size at least.

# GPL version 2 applies. No warranties, yadda, yadda. Have fun.

# Modified to add sanity checks and fix CentOS4 syntax errors

# TODO:
#   Add checks for available disk space on devices holding output and
#       temp files.
#   Add optional 3rd parameter to specify location of temp directory.
#   Create .discinfo if not present.

if [ $# -lt 2 ]; then
        echo "Usage: `basename $0` source /destination/DVD.iso"
        echo ""
        echo "        The 'source' can be either a directory containing a single"
        echo "        set of isos, or an exploded tree like an ftp site."
        exit 1
fi

if [ ! -f /usr/lib/anaconda-runtime/implantisomd5 ]; then
    echo "Error: /usr/lib/anaconda-runtime/implantisomd5 Not Found!"
    echo "Please install anaconda-runtime and try again."
    exit 1
fi

DVD_DIR=`dirname $2`
DVD_FILE=`basename $2`

echo "DVD directory is $DVD_DIR"
echo "ISO file is $DVD_FILE"

if [ "$DVD_DIR" = "." ]; then
    echo "Destinaton Directory $DVD_DIR does not exist"
    exit 1
else
    if [ ! -d "/$DVD_DIR" ]; then
        echo "Destinaton Directory $DVD_DIR must be an absolute path"
        exit 1
    else
        if [ "$DVD_FILE" = "" ] || [ -d "$DVD_DIR/$DVD_FILE" ]; then
            echo "Null ISO file name."
            exit 1
        fi
    fi
fi

which mkisofs >&/dev/null
if [ "$?" != 0 ]; then
    echo "mkisofs Not Found"
    echo "yum install mkisofs"
fi

which createrepo >&/dev/null
if [ "$?" != 0 ]; then
    echo "createrepo Not Found"
    echo "yum install createrepo"
fi

if [ -f $2 ]; then
    echo "DVD ISO destination $2 already exists. Remove first to recreate."
    exit 1
fi

# Make sure there is enough free space to hold the DVD image on the filesystem
# where the home directory resides, otherwise change ~/mkrhdvd to point to
# a filesystem with sufficient free space.

cleanup() {
    [ ${LOOP:=/tmp/loop} = "/" ] && echo "LOOP mount point = \/, dying!" && exit
    [ -d $LOOP ] && rm -rf $LOOP 
    [ ${DVD:=~/mkrhdvd} = "/" ] && echo "DVD data location is \/, dying!" && exit
    [ -d $DVD ] && rm -rf $DVD 
}

cleanup
mkdir -p $LOOP
mkdir -p $DVD

ls $1/*.iso &>/dev/null
if [ "$?" = 0 ]; then

    echo "Found ISO CD images..."

    CDS=`expr 0`
    DISKS="1"

    [ -w / ] || {   # Very portable, but perhaps not perfect, test for superuser.
        echo "Only 'root' may use this script for loopback mounts" 1>&2
        exit 1
    }

    for f in `ls $1/*.iso`; do
        mount -o loop $f $LOOP
        cp -av $LOOP/* $DVD
        if [ -f $LOOP/.discinfo ]; then
            cp -av $LOOP/.discinfo $DVD
            CDS=`expr $CDS + 1`
            if [ $CDS != 1 ] ; then
                DISKS=`echo ${DISKS},${CDS}`
            fi
        fi
        umount $LOOP
    done
else
    if [ -f $1/isolinux/isolinux.bin ]; then

        echo "Found FTP-like tree..."

        if [ -e $1/.discinfo ]; then
            cp -av $1/.discinfo $DVD
        else
# How does one construct a legal .discinfo file if none is found?
            echo "Error: No .discinfo file found in $1"
            cleanup
            exit 1
        fi
        cp -av $1/* $DVD
    else
        echo "Error: No CD images nor FTP-like tree found in $1"
        cleanup
        exit 1
    fi
fi

if [ -e $DVD/.discinfo ]; then
    awk '{ if ( NR == 4 ) { print disks } else { print ; } }' disks="ALL" $DVD/.discinfo > $DVD/.discinfo.new
    mv $DVD/.discinfo.new $DVD/.discinfo
else
    echo  "Error: No .discinfo file found in $DVD"
    cleanup
    exit 1
fi

rm -rf $DVD/isolinux/boot.cat
find $DVD -name TRANS.TBL | xargs rm -f

cd $DVD
createrepo -g repodata/comps.xml ./
mkisofs -J -R -v -T -o $2 -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 8 -boot-info-table $DVD
if [ "$?" = 0 ]; then

    echo ""
    echo "Image complete, create md5sum..."

#   /usr/lib/anaconda-runtime/implantisomd5 --force $2
# Don't like forced mediacheck? Try this instead.
    /usr/lib/anaconda-runtime/implantisomd5 --supported-iso --force $2

    echo "Start cleanup..."

    cleanup

    echo ""
    echo "Process Complete!"
    echo "Wrote DVD ISO image to $DVD_DIR/$DVD_FILE"
    echo ""
else
    echo "ERROR: Image creation failed, start cleanup..."

    cleanup

    echo ""
    echo "Failed to create ISO image $DVD_DIR/$DVD_FILE"
    echo ""
fi