Creating the Initialization Script

In this step, you will create an initialization script that enables the application to work inside a Custom Partition. In a regular installation, the files of the Zoom application would be located in /usr, /opt and so on, whereas in the Custom Partition, they are located under /custom/zoom/usr,  /custom/zoom/opt and so on. The initialization script will fix this by creating symbolic links so that for example /custom/zoom/usr/lib/library.so will appear to be in /usr/lib/library.so, where Zoom expects it.

1. On your workstation, go to the directory where the zoom directory is located.
   

2. Open your text editor of choice and enter the following script:

   BASH

   #!/bin/sh
   
   ACTION="custompart-zoom_${1}"
   
   # mount point path
   MP=$(get custom_partition.mountpoint)
   
   # custom partition path
   CP="${MP}/zoom"
   
   # wfs for persistent login and history
   WFS="/wfs/user/.zoom/data"
   
   # .zoom directory
   ZOOM="/userhome/.zoom/"
   
   # output to systemlog with ID amd tag
   LOGGER="logger -it ${ACTION}"
   
   echo "Starting" | $LOGGER
   
   case "$1" in
   init)
           # Linking files and folders on proper path
   	find ${CP} | while read LINE
           do
                   DEST=$(echo -n "${LINE}" | sed -e "s|${CP}||g")
                   if [ ! -z "${DEST}" -a ! -e "${DEST}" ]; then
                           # Remove the last slash, if it is a dir
                           [ -d $LINE ] && DEST=$(echo "${DEST}" | sed -e "s/\/$//g") | $LOGGER
                           if [ ! -z "${DEST}" ]; then
                                   ln -sv "${LINE}" "${DEST}" | $LOGGER
                           fi
                   fi
           done
   
   	# Linking /userhome/.zoom/data to /wfs/user/.zoom/data for some basic persistency
   	mkdir -p ${WFS}
   	chown -R user:users ${WFS}
   	mkdir -p ${ZOOM}/data
   	chown -R user:users ${ZOOM}/data
           mkdir -p ${ZOOM}/data/VirtualBkgnd_Custom
           chown -R user:users ${ZOOM}/data/VirtualBkgnd_Custom
           mkdir -p ${ZOOM}/data/VirtualBkgnd_Default
           chown -R user:users ${ZOOM}/data/VirtualBkgnd_Default
   	
   	ln -sv ${WFS}/zoomus.db ${ZOOM}/data/zoomus.db | $LOGGER
   	ln -sv ${WFS}/zoommeeting.db ${ZOOM}/data/zoommeeting.db | $LOGGER
   	ln -sv ${WFS}/VirtualBkgnd_Custom ${ZOOM}/data/ | $LOGGER
   	ln -sv ${WFS}/VirtualBkgnd_Default ${ZOOM}/data/ | $LOGGER
           
           chown user:users /wfs/user/.zoom
           ln -sv /wfs/user/.zoom/zoomus.conf /userhome/.config/zoomus.conf | $LOGGER	
   	
           # remove all com.zoom.ipc* files from /wfs/user/.zoom/data - might cause issues when updating zoom
           rm ${WFS}/com.zoom.ipc*
   	
   	# add /opt/zoom to ld_library
   	echo "${CP}/opt/zoom" > /etc/ld.so.conf.d/zoom.conf
   	ldconfig
   
   	${MP}/zoom_postinst | $LOGGER
   
   ;;
   stop)
   	# unlink linked files
   	find ${CP} | while read LINE
           do
                   DEST=$(echo -n "${LINE}" | sed -e "s|${CP}||g")
   		unlink $DEST | $LOGGER
   	done
   
   	# remove zoom.conf because it is not needed anymore
   	rm /etc/ld.so.conf.d/zoom.conf
   
   
   ;;
   esac
   
   echo "Finished" | $LOGGER
   
   exit 0
   
   
   

   

   The code line echo "${CP}/opt/zoom" > /etc/ld.so.conf.d/zoom.conf tells the Zoom application via the configuration file zoom.conf to search for libraries in /custom/opt/zoom. This is expected by the Zoom application.

3. Save the file as custompart-zoom

Next Step

>> Compressing the Custom Partition Contents 2