This commit was manufactured by cvs2svn to create branch

[bootcd.git] / cdcustom.sh

diff --git a/cdcustom.sh b/cdcustom.sh
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+#!/bin/bash
+
+# purpose : create a node-specific CD ISO image
+
+# given a CD ISO image, and a node-specific config file, this command
+# creates a new almost identical ISO image with the config file
+# embedded as boot/plnode.txt 
+
+set -e 
+COMMAND=$(basename $0)
+
+function usage () {
+
+   echo "Usage: $0 generic-iso node-config [node-configs]"
+   echo "Creates a node-specific ISO image"
+   echo "with the node-specific config file embedded as /boot/plnode.txt"
+   exit 1
+}
+
+### read config file in a subshell and echoes host_name
+function host_name () {
+  export CONFIG=$1; shift
+  ( . $CONFIG ; echo $HOST_NAME )
+}
+
+function cleanup () {
+   echo "Unmounting"
+   umount $ISOINROOT
+   echo "Cleaning mount-point"
+   rmdir $ISOINROOT
+   if [ -f $NODECONFPLAIN ] ; then
+     echo Cleaning $NODECONFPLAIN
+     rm -f $NODECONFPLAIN
+   fi
+}
+
+function abort () {
+   echo "Cleaning $ISOOUT"
+   rm -f $ISOOUT
+   cleanup
+}
+
+function main () {
+
+   [[ -n "$TRACE" ]] && set -x
+
+   [[ -z "$@" ]] && usage
+   ISOIN=$1; shift
+   [[ -z "$@" ]] && usage
+
+   for NODECONF in "$@" ; do
+
+     NODENAME=$(host_name $NODECONF)
+     if [ -z "$NODENAME" ] ; then
+       echo "HOST_NAME not found in $NODECONF - exiting"
+       exit 1
+     fi
+   
+     ISODIR=$(dirname "$ISOIN")
+     ISOOUT=$ISODIR/$NODENAME.iso
+     ISOLOG=$ISODIR/$NODENAME.log
+
+
+     ### temporary mount point
+     ISOINROOT=$(basename $ISOIN .iso)
+     
+     ### checking
+     if [ ! -f $ISOIN ] ; then
+       echo "Could not find template ISO image - exiting" ; exit 1
+     fi
+     if [ ! -f $NODECONF ] ; then
+       echo "Could not find node-specifig config - exiting" ; exit 1
+     fi
+     if [ -e "$ISOINROOT" ] ; then
+       echo "Temporary mount point $ISOINROOT exists, please clean up first - exiting" ; exit 1
+     fi
+     if [ -e  "$ISOOUT" ] ; then
+       echo "$ISOOUT exists, please remove first - exiting" ; exit 1
+     fi
+     
+     ### in case the NODECONF is a symlink
+     NODECONFPLAIN=/tmp/$$
+     cp $NODECONF $NODECONFPLAIN
+     
+     ### summary
+     echo -e "Generic ISO image:\r\t\t\t$ISOIN"
+     echo -e "Node-specific config:\r\t\t\t$NODECONF"
+     echo -e "Node-specific ISO:\r\t\t\t$ISOOUT"
+     echo -e "Temporary mount-point:\r\t\t\t$ISOINROOT"
+     
+     echo -ne "OK ? "
+     read answer
+     
+     echo -n "Creating mount-point "
+     mkdir -p $ISOINROOT
+     echo Done
+
+     echo -n "Mounting generic image "
+     mount -o ro,loop $ISOIN $ISOINROOT 
+     echo Done
+
+     ### mkisofs needs to have write access on the boot image passed with -b
+     ### and we cannot use the same name as isolinux.bin either, so we change it to isolinux
+     ### the good news is that this way we can check we start from a fresh image
+     
+     if [ -e $ISOINROOT/isolinux/isolinux ] ; then
+       echo "$ISOIN already contains isolinux/isolinux"
+       echo "It looks like this is not a first-hand image - exiting"
+       cleanup
+       exit 1
+     fi
+
+     echo -n "Copying isolinux.bin in /tmp/isolinux "
+     cp $ISOINROOT/isolinux/isolinux.bin /tmp/isolinux
+     echo Done
+     
+     echo -n "Writing custom image ... "
+     trap abort int hup quit err
+     mkisofs -o $ISOOUT -R -allow-leading-dots -J -r -b isolinux/isolinux \
+     -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table \
+     --graft-points $ISOINROOT isolinux/isolinux=/tmp/isolinux boot/plnode.txt=$NODECONFPLAIN > $ISOLOG 2>&1
+     trap - int hup quit 
+     echo Done
+   
+     cleanup
+
+     echo "CD ISO image for $NODENAME in $ISOOUT"
+   done
+
+}
+
+####################
+main "$@"