Downloads and installs the desired TeamViewer Host major version

TeamViewerHost_Install.sh

#!/bin/bash

# Downloads the latest TeamViewer Host package, effectively going to 
# get.teamviewer.com/YOURCUSTOMHOSTURL in a browser.

########################################################
LOGFILE="/Library/Logs/TeamViewerInstall.log"
DOWNLOADDIR="/Users/Shared"
# Ex. 12, 13, or 14
MAJORVERSION="13"
# Custom module ID, everything after the hyphen in the downloaded module
CUSTOMID="idcXXXXXXX"
PKG="Install TeamViewerHost-${CUSTOMID}.pkg"
URL='https://dl.tvcdn.de//download/version_${MAJORVERSION}x/CustomDesign/Install%20TeamViewerHost-${CUSTOMID}.pkg'

# Create a function to echo output and write to a log file
writelog() {
	/bin/echo "${1}"	"${2}" "${3}" "${4}"
	/bin/echo $(date) "${1}"	"${2}" "${3}" "${4}" >> $LOGFILE
}
########################################################

# Check for TeamViewer.log
if [ -f "$LOGFILE" ]; then
    writelog "CHECK: TeamViewerInstall.log Present."
else
    /usr/bin/touch $LOGFILE
    writelog "CREATED: TeamViewerInstall.log"
    /bin/chmod 777 $LOGFILE
    if [ $? = 0 ]; then
        writelog "SUCCESSFUL: Set TeamViewerInstall.log Permissions."
    else
        writelog "FAILED: Set TeamViewerInstall.log Permissions."
    fi
fi

writelog "------- START -------"

writelog "DOWNLOADING: TeamViewer Host PKG"
/usr/bin/curl "$URL" -o "$DOWNLOADDIR"/"$PKG"

if [ -f "$DOWNLOADDIR/$PKG" ]; then
    # Installs package
    writelog "INSTALLING: TeamViewer Host ..."
    /usr/sbin/installer -pkg "$DOWNLOADDIR/$PKG" -target /
    if [ $? = 0 ]; then
        writelog "TeamViewerHost Install: Successful."
        
        writelog "DELETING: TeamViewer Host PKG ..."
        /bin/rm "$DOWNLOADDIR/$PKG"

        if [ ! -f "$DOWNLOADDIR/$PKG" ]; then
            writelog "TeamViewerHost Install PKG Deletion: Successful."
        else
            writelog "TeamViewerHost Install PKG Deletion: Failed."
        fi
        
        writelog "Launching TeamViewer Host for the first time ..."
        /usr/bin/open -a "TeamViewerHost"

        writelog "Script Complete: TeamViewer Host Installed!"
    else
        writelog "TeamViewerHost Install: Failed."
        exit 1
    fi
fi

writelog "------- DONE -------"

exit