#!/bin/bash
# **********************************************************************
# Pandora FMS Agent - Generic Host Agent Installer
# GNU/Linux version
# (c) 2007 Sancho Lerena <slerena@gmail.com>
# Please see http://pandora.sourceforge.net
# This code is licensed under GPL 2.0 license.
# **********************************************************************

PI_VERSION=1.0
PANDORA_BIN=/usr/bin/pandora_agent
PANDORA_HOME=/usr/share/pandora_agent
PANDORA_TEMP=/var/spool/pandora
PANDORA_CFG=/etc/pandora
PANDORA_LOG=/var/log/pandora/pandora_agent.log
PANDORA_STARTUP=/etc/init.d/pandora_agent_daemon
FORCE=0
LOG_TIMESTAMP=`date +"%Y/%m/%d %H:%M:%S"`

MODE=$1

if [ ! -f "pandora_agent" ]
then
	echo " "
	echo "You need to place pandora_agent file on main distribution directory before install"
	echo " "
	exit 1
fi

uninstall () {
        echo "Removing Pandora FMS Agent..."
        rm -Rf $PANDORA_BIN
        rm -Rf $PANDORA_TEMP
        rm -Rf $PANDORA_CFG
        rm -Rf $PANDORA_STARTUP
        rm -Rf $PANDORA_HOME
        rm -Rf $PANDORA_LOG
        echo "Done"
}

install () {
        if [ -f $PANDORA_HOME ] && [ "$FORCE" = "0" ]
        then
                echo "Seems that default dir already exists. Please use --force to"
                echo "force installer to install on $PANDORA_HOME"
                exit
        else
                echo "Checking default dir $PANDORA_HOME..."
        fi

        if [ -f $PANDORA_BIN ] && [ "$FORCE" = "0" ]
        then
                echo "Seems that $PANDORA_BIN already exists. Please use --force to"
                echo "force installer to reinstall overwriting it"
                exit
        else
                echo "Checking Pandora FMS Agent on $PANDORA_BIN...."
        fi

        # Create directories
        echo "Creating Pandora FMS Agent home directory at $PANDORA_HOME ..."
        mkdir $PANDORA_HOME
        mkdir $PANDORA_TEMP
        mkdir $PANDORA_TEMP/data_out
        mkdir $PANDORA_CFG
	mkdir /var/log/pandora

        # Create logfile
        if [ ! -z "`touch $PANDORA_LOG`" ]
        then
                echo "Seems to be a problem generating logfile ($PANDORA_LOG) please check it";
        else
                echo "Creating logfile at $PANDORA_LOG..."
        fi

        echo "$LOG_TIMESTAMP Pandora FMS installer has created this file at startup" > $PANDORA_LOG

        # Copying agent and securing it
        echo "Copying Pandora FMS Agent to $PANDORA_BIN..."
        cp pandora_agent $PANDORA_BIN
        chmod 700 $PANDORA_BIN
	
	echo "Copying Pandora FMS Agent contrib dir to $PANDORA_HOME/..."
        cp pandora_agent_daemon $PANDORA_HOME

        echo "Copying Pandora FMS Agent configuration file to $PANDORA_HOME/pandora_agent.conf..."
        cp pandora_agent.conf $PANDORA_HOME
        chmod 600 $PANDORA_HOME/pandora_agent.conf

        echo "Copying Pandora FMS Agent user configuration file to $PANDORA_HOME/pandora_user.conf..."
        cp pandora_user.conf $PANDORA_HOME
        chmod 700 $PANDORA_HOME/pandora_user.conf

        echo "Linking Pandora FMS Agent configuration to $PANDORA_CFG/pandora_agent.conf..."
        ln -s $PANDORA_HOME/pandora_agent.conf $PANDORA_CFG

        echo "Linking Pandora FMS Agent user configuration to $PANDORA_CFG/pandora_user.conf..."
        ln -s $PANDORA_HOME/pandora_user.conf $PANDORA_CFG
        
        echo "Setting secure permissions and ownership for all Pandora FMS Agent files..."
        chown -R root $PANDORA_HOME
        chmod -R 600 $PANDORA_TEMP/data_out
        chmod 640 $PANDORA_LOG
        chgrp 3 $PANDORA_LOG
        echo "Copyng start-up daemon script at $PANDORA_STARTUP";
        cp pandora_agent_daemon $PANDORA_STARTUP
        chown -R root $PANDORA_BIN
        echo "Done."
        echo " "
        echo "You have your startup script ready at $PANDORA_STARTUP"
        echo "First you need to copy your public SSH keys ($HOME/.ssh/id_dsa)"
        echo "under /home/pandora/.ssh/authorized_keys on your Pandora FMS Server host"
        echo "You also need to setup your $PANDORA_CFG/pandora_agent.conf config file"
        echo " "

}

help () {
        echo "     --force-install     To force installation if already installed on system "
        echo "     --install           To install Pandora FMS Agent on this system"
        echo "     --uninstall         To uninstall and remove Pandora FMS Agent on this System"
        echo " "
}

# Script banner at start
echo " "
echo "Pandora FMS Agent Installer $PI_VERSION (c) 2007 Sancho Lerena"
echo "This program is licensed under GPL2 Terms. http://pandora.sourceforge.net"
echo " "

case "$MODE" in

'--force-install')
        FORCE=1
        install
        exit
        ;;

'--install')
        install
        exit
        ;;

'--uninstall')
        uninstall
        exit
        ;;

*)
        help
esac