LTInstall_General

#!/bin/sh
#####
# LabTech Native Linux Agent Installer
#
# This script installs the agent and system tray.  It must be obtained 
# from the Web Control Center page, because that page inserts some 
# information into this script during download.  It may be run from
# any directory, as may the uninstall script (created during an 
# install).  It creates the directory /usr/lib/labtech for the agent,
# and within that creates subdirectory systray for the system tray. 
# It starts the agent as a background job, but does not start the
# system tray.  Users must start the system tray as needed.  This 
# script must be run with administrator privileges, as must the agent.
# The system tray, on the other hand, should not be run as 
# administrator.  This script insures that the agent will start when 
# the machine boots up by placing a startup script in directories 
# /etc/init.d and /lib/systemd/system if they exist.  This script will 
# not install the agent and tray if they are already present.  If an 
# install attempt ends in an irregular manner, and that prevents the 
# next attempt from working, it will be necessary to manually remove 
# directory usr/lib/labtech and its contents.  After that, installs 
# should work again.  After a successful install, the uninstall 
# script, LTUninstall_General, should be present in the directory 
# /usr/lib/labtech to be used when needed.  After installing, one can
# verify that the agent is running by giving a command such as
# "ps -e | grep LT" (without quotes).  The command output should show
# the agent and monitor processes.  If any problems occur during
# installation, they will be noted in the file:  /tmp/LTInstallLog.
# If no problems occurred, that log will not be created.
#####

####
# Constants
####

LOG_FILE="/tmp/LTInstallLog"
INSTALL_DIR="/usr/lib/labtech"
WGET=$(command -v wget)
CURL=$(command -v curl)

####
# Functions
####
LogError()
{
    echo $1 >> $LOG_FILE
}

DeleteAgentComponents()
{
    rm -f LT_Readme.txt linux_* LT*.tar* LTLinuxAgent LTSystray LTAgentMonitor LTUninstall_General AgentRegistry
    rm -f 03_books.png cancel.png chat.png exit.png globe.png info.png inventory.png LabTechDefault.png LabTech.ico LabTech.png priority.png send.png ticket.png web_camera.png
    rm -rf $INSTALL_DIR
}

####
# Main
####
echo

# Clear any old copy of the install log
rm -f $LOG_FILE

# Determine whether 32 bit or 64 bit OS
valFound="F"
regSize=`getconf LONG_BIT 2>/dev/null`

# Check getconf exit code
if [ "$?" -eq "0" ]
then
    if [ "$regSize" -eq "32" -o "$regSize" -eq "64" ]
    then
        valFound="T"
    fi
fi

if [ "$valFound" = "F" ]
then
    echo ""
    echo ""
    echo "Please select one of the following options by entering 1 or 2:"
    echo ""
    echo "1.  32 bit"
    echo "2.  64 bit"
    echo ""

    answerInRange=0
    while [ "$answerInRange" -eq 0 ]
    do
        read inputline
        case $inputline in
           1) regSize=32;answerInRange=1;;
           2) regSize=64;answerInRange=2;;
           *) echo " ";echo "You must select either 1 or 2";echo " ";;
        esac
    done
fi

# The rights on these directories are set to 777 so that the system tray can access them with any logon.
mkdir $INSTALL_DIR
mkdir $INSTALL_DIR/systray

# Determine the flavor of Linux being run
cd /etc

redhat_count=`grep -i redhat * 2>/dev/null | wc -l`
debian_count=`grep -i debian * 2>/dev/null | wc -l`
fedora_count=`grep -i fedora * 2>/dev/null | wc -l`
ubuntu_count=`grep -i ubuntu * 2>/dev/null | wc -l`
centos_count=`grep -i centos * 2>/dev/null | wc -l`
suse_count=`grep -i suse * 2>/dev/null | wc -l`

cd -

count=0
type="FEDORA"

if test $redhat_count -gt $count
   then type="REDHAT"
   count=$redhat_count
fi
if test $debian_count -gt $count
   then type="DEBIAN"
   count=$debian_count
fi
if test $fedora_count -gt $count
   then type="FEDORA"
   count=$fedora_count
fi
if test $ubuntu_count -gt $count
   then type="UBUNTU"
   count=$ubuntu_count
fi
if test $centos_count -gt $count
   then type="CENTOS"
   count=$centos_count
fi
if test $suse_count -gt $count
   then type="SUSE"
   count=$suse_count
fi

if test $count -lt 1
   then echo "Cannot tell Linux flavor.  Doing Fedora (default) install."
   exit
else
   echo $type " Linux detected.  Installing LabTech."
fi

rm LTsetup*.ta* 2>/dev/null

case $regSize in
    32) 
        if [ ! -z $WGET ]
            then
            echo "WGet found, using to download agent files."
            $WGET --no-check-certificate http://labtech.vc3.com/labtech/updates/LTsetup.tar
        else
            if [ ! -z $CURL ]
            then
                echo "WGet does not appear to exist on the system. Using cURL."
                    $CURL -k -O http://labtech.vc3.com/labtech/updates/LTsetup.tar
        	else
                    echo "Both cURL and WGet appear to be missing, unable to download the agent files. Please install either cURL or WGet and re-run the installer."
            fi
        fi
        	
	if [ ! -f "LTsetup.tar" ]
	then
	    rmdir $INSTALL_DIR/systray 2>/dev/null
	    rmdir $INSTALL_DIR 2>/dev/null
	    echo
	    echo "Tar file failed to download.  Please call support."
	    LogError "Tar file failed to download.  Exiting without installing."
	    exit
	fi
  	tar -xvf LTsetup.tar
    ;;
    64) 
        if [ ! -z $WGET ]
            then
            echo "WGet found, using to download agent files."
            $WGET --no-check-certificate http://labtech.vc3.com/labtech/updates/LTsetup64.tar
        else
            if [ ! -z $CURL ]
            then
                    echo "WGet does not appear to exist on the system. Using cURL."
                    $CURL -k -O http://labtech.vc3.com/labtech/updates/LTsetup64.tar
            else
                    echo "Both cURL and WGet appear tobe missing, unable to download the agent files. Please install either cURL or WGet and re-run the installer."
            fi
        fi
  	
	if [ ! -f "LTsetup64.tar" ]
	then
	    rmdir $INSTALL_DIR/systray 2>/dev/null
	    rmdir $INSTALL_DIR 2>/dev/null
	    echo
	    echo "Tar file failed to download.  Please call support."
	    LogError "Tar file failed to download.  Exiting without installing."
	    exit
	fi
  	tar -xvf LTsetup64.tar
    ;;
    *) 
        echo "Could not determine OS bit size.  Please call support."
	LogError "Could not determine OS bit size.  Exiting without installing."
	exit
    ;;
esac

if [ ! -f "LTLinuxAgent" ]
then
   echo
   echo "Agent executable not found among downloaded components.  Please call support."
   LogError "Agent executable not found.  Untar may have failed.  Exiting without installing."
   DeleteAgentComponents
   exit
fi

chmod 740 LT* Agent*

# The file AgentRegistry already exists, and here we add new lines to it, but AgentInternals is created here.
if [ -e /tmp/ltupdate/SavedComputerId ]; then
    computer_id=$(cat /tmp/ltupdate/SavedComputerId)
    echo computer_id=$computer_id > AgentRegistry
    echo cmd_tab_task_timeout=3600 >> AgentRegistry
    echo log_max_bytes=1500000 >> AgentRegistry
    echo log_level_generic=2 >> AgentRegistry
    echo log_level_inventory=2 >> AgentRegistry
    echo log_level_commands=2 >> AgentRegistry
    echo log_level_communication=2 >> AgentRegistry
    echo log_level_main_thread=2 >> AgentRegistry
    echo log_level_monitors=2 >> AgentRegistry
    echo log_level_snmp=2 >> AgentRegistry
    echo monitor_trending_enabled=T >> AgentRegistry
    echo network_interface_name= >> AgentRegistry
fi

echo "server_address=http://labtech.vc3.com/labtech/agent.aspx" >> AgentRegistry
echo "location_id=37" >> AgentRegistry
echo "register_size="$regSize >> AgentRegistry
echo "ticket_code=4kjnxvZ3QT4=" > AgentInternals

if [ -e /tmp/ltupdate/AgentInternals.bak ]; then
    passkey=$(grep computer_passkey /tmp/ltupdate/AgentInternals.bak)
    comppk=$(echo "$passkey" | awk -F '=' '{ print $2 }')
    echo computer_passkey=$comppk >> AgentInternals
fi

chmod 740 Agent*
mv LTUninstall_General $INSTALL_DIR
mv LTLinuxAgent $INSTALL_DIR
mv Agent* $INSTALL_DIR
mv LTAgentMonitor $INSTALL_DIR
mv LTSystray 03_books.png cancel.png chat.png exit.png globe.png info.png inventory.png LabTechDefault.png LabTech.ico LabTech.png priority.png send.png ticket.png web_camera.png $INSTALL_DIR/systray 2>/dev/null
mv LT_Readme.txt $INSTALL_DIR

# Install agent startup script.
# If the initd directories are present, then place the startup script there and create links to the rc.d directories.
automaticStart="F"
if test -d /etc/init.d
then
    rm -f /etc/init.d/linux_agent_fedora
    rm -f /etc/init.d/linux_agent_ubuntu
    rm -f /etc/init.d/linux_agent_redhat
    rm -f /etc/init.d/linux_agent_debian
    automaticStart="T"
    case $type in
    "REDHAT"|"FEDORA"|"CENTOS"|"SUSE")
        mv linux_agent_redhat /etc/init.d/linux_agent
        chmod 750 /etc/init.d/linux_agent
        rm linux_agent_debian 2>/dev/null
        success="F"
        chkconfig --add linux_agent 2>/dev/null

        # Check exit code
        if [ "$?" -eq "0" ]
        then
            success="T"
        else
            /sbin/chkconfig --add linux_agent 2>/dev/null

            # Check exit code
            if [ "$?" -eq "0" ]
            then
                success="T"
            fi
        fi

        if [ "$success" != "T" ]
        then
            # Can't find chkconfig.  Create links manually.
            RCPATH="NONE"
            if test -d /etc/rc.d/rc0.d
            then
                RCPATH="/etc/rc.d"
            elif test -d "/etc/rc0.d"
            then
                RCPATH="/etc"
            fi

            if [ "$RCPATH" != "NONE" ]
            then
                ln -s /etc/init.d/linux_agent $RCPATH/rc0.d/K20linux_agent 2>/dev/null
                ln -s /etc/init.d/linux_agent $RCPATH/rc1.d/K20linux_agent 2>/dev/null
                ln -s /etc/init.d/linux_agent $RCPATH/rc2.d/K20linux_agent 2>/dev/null
                ln -s /etc/init.d/linux_agent $RCPATH/rc3.d/S20linux_agent 2>/dev/null
                ln -s /etc/init.d/linux_agent $RCPATH/rc4.d/S20linux_agent 2>/dev/null
                ln -s /etc/init.d/linux_agent $RCPATH/rc5.d/S20linux_agent 2>/dev/null
                ln -s /etc/init.d/linux_agent $RCPATH/rc6.d/K20linux_agent 2>/dev/null
            fi
        fi
    ;;
    "DEBIAN"|"UBUNTU")
        mv linux_agent_debian /etc/init.d/linux_agent
        chmod 750 /etc/init.d/linux_agent
        rm linux_agent_redhat 2>/dev/null
        success="F"
        update-rc.d linux_agent defaults 2>/dev/null

        # Check exit code
        if [ "$?" -eq "0" ]
        then
            success="T"
        else
            /usr/sbin/update-rc.d linux_agent defaults 2>/dev/null

            # Check exit code
            if [ "$?" -eq "0" ]
            then
                success="T"
            fi
        fi

        if [ "$success" != "T" ]
        then
            # Can't find update-rc.d.  Create links manually.
            RCPATH="NONE"
            if test -d /etc/rc.d/rc0.d
            then
                RCPATH="/etc/rc.d"
            elif test -d "/etc/rc0.d"
            then
                RCPATH="/etc"
            fi

            if [ "$RCPATH" != "NONE" ]
            then
                ln -s /etc/init.d/linux_agent $RCPATH/rc0.d/K20linux_agent 2>/dev/null
                ln -s /etc/init.d/linux_agent $RCPATH/rc1.d/K20linux_agent 2>/dev/null
                ln -s /etc/init.d/linux_agent $RCPATH/rc2.d/K20linux_agent 2>/dev/null
                ln -s /etc/init.d/linux_agent $RCPATH/rc3.d/S20linux_agent 2>/dev/null
                ln -s /etc/init.d/linux_agent $RCPATH/rc4.d/S20linux_agent 2>/dev/null
                ln -s /etc/init.d/linux_agent $RCPATH/rc5.d/S20linux_agent 2>/dev/null
                ln -s /etc/init.d/linux_agent $RCPATH/rc6.d/K20linux_agent 2>/dev/null
            fi
        fi
    ;;
    esac
fi

# If the systemd directories are present, then place the service there and activate it.
if test -d /lib/systemd/system
then
    if test -d /etc/systemd/system
    then
        automaticStart="T"
        mv linux_agent.service /lib/systemd/system
        systemctl enable linux_agent.service 1>/dev/null 2>/dev/null
    fi
fi
rm -f linux_agent.service 2>/dev/null
rm LTsetup*.ta* 2>/dev/null

if [ $automaticStart = "F" ]
then
    LogError "Could not find either /etc/init.d or systemd directories, so automatic start on boot could not be implemented."
fi

chmod -R 744 $INSTALL_DIR
chmod 755 $INSTALL_DIR
chmod -R 755 $INSTALL_DIR/systray
touch $INSTALL_DIR/systray/SysTrayLog.txt
chmod 777 $INSTALL_DIR/systray/SysTrayLog.txt

# Start the agent monitor in the background unless the command line argument "nostart" is added.  "Nostart" is used for version updates.
if [ "$1" != "nostart" ]
then
    # Try to start the monitor the systemd way.  If it comes up, we're done.  If not, just start the monitor in the background.
    # The monitor will see that the agent is down and start it.  The monitor program takes one command line argument, which 
    # is the program to be monitored.
    systemctl start linux_agent.service 1>/dev/null 2>/dev/null
    sleep 1
    MonitorLine=`ps -ef | grep LTAgentMonitor | grep -v grep`
    if [ -z "$MonitorLine" ]
    then
        $INSTALL_DIR/LTAgentMonitor /usr/lib/labtech/LTLinuxAgent &
    fi
fi

# Fix permissions on linux_agent startup file
chmod 750 /etc/init.d/linux_agent

# Remove old update files if they exist
if [ -d /tmp/ltupdate ]; then
    rm -rf /tmp/ltupdate
fi

echo
echo "Installation is complete."