#!/bin/bash

# (c) Michael Honkoop <mhonkoop@comsolve.nl>

# License: GNU General Public License v2

# v1.0:
# - Initial release of the script
# v1.1:
# - Aligned quotation marks around variables cosistently
# v1.2:
# - started refining the script to a more modern bash-style
# v1.3:
# - adapted debug-output to go to stderr
#
# Current active version of the script
SCRIPT_VERSION=1.3

################################################################
# Global definitions for the script - change to fit your needs #
################################################################

# Look for a process if a GroupWise MailTransferAgent (MTA) should be running (0 if no MTA is on the client, else set 1)
gwMTA=1

# Look for a process if a GroupWise PostOffice (POA) should be running (0 if no POA is on the client, else set 1)
gwPOA=1

# Look for a process if a GroupWise Internet Agent (GWIA) should be running (0 if no GWIA is on the client, else set 1)
gwIA=1

# Debug switch for development purposes ( 0 for no debug, 1 for debug information )
debug=0

# Service name
SERVICE="GroupWise"

#####################################################################
# DO NOT CHANGE BELOW UNLESS YOU EXACTLY KNOW WHAT YOU ARE DOING    #
#####################################################################

if [[ "$gwMTA" -eq 1 ]]
then
    if [[ "$debug" -eq 1 ]]
    then
        echo "DEBUG: $SERVICE gwMTA is enabled in config, checking for the process." >&2
    fi
    gwMTAProcess=$(pgrep -x gwmta)
    if [[ -n "$gwMTAProcess" ]]
    then
        if [[ "$debug" -eq 1 ]]
        then
            echo "DEBUG:We found a $SERVICE gwMTA process ID: $gwMTAProcess" >&2
        fi
        gwMTAListener=$(ss -lpn | grep -F "pid=$gwMTAProcess," |awk '{print $5}' | grep -E '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'| sed -E ':a;N;$!ba;s/\r{0,1}\n/\\n/g') 
        if [[ -n "$gwMTAListener" ]]
        then
            if [[ "$debug" -eq 1 ]]
            then
                echo "DEBUG:We found atleast one $SERVICE gwMTA listener: $gwMTAListener" >&2
            fi
            echo "P \"$SERVICE MTA\" status=1;;;1 $SERVICE Mail Transfer Agent is running with PID: $gwMTAProcess and listening.\n $gwMTAListener"
        else
            if [[ "$debug" -eq 1 ]]
            then
                echo "DEBUG:We found no listeners for the $SERVICE gwMTA process with process ID: $gwMTAProcess" >&2
            fi
            echo "P \"$SERVICE MTA\" status=0.5;;;1 $SERVICE Mail Transfer Agent is running with PID: $gwMTAProcess but not listening."
        fi
    else
        if [[ "$debug" -eq 1 ]]
        then
            echo "DEBUG: $SERVICE gwMTA is enabled in config, but no processes could be found." >&2
        fi
        echo "P \"$SERVICE MTA\" status=0;;;1 $SERVICE Mail Transfer Agent process is not Running."
    fi
else
    echo "DEBUG: $SERVICE gwMTA is not enabled in config, skipping." >&2
fi

if [[ "$gwPOA" -eq 1 ]]
then
     if [[ "$debug" -eq 1 ]]
    then
        echo "DEBUG: $SERVICE gwPOA is enabled in config, checking for the process." >&2
    fi
    gwPOAProcess=$(pgrep -x gwpoa)
    if [[ -n "$gwPOAProcess" ]]
    then
        if [[ "$debug" -eq 1 ]]
        then
            echo "DEBUG:We found a $SERVICE gwPOA process ID: $gwPOAProcess" >&2
        fi
        gwPOAListener=$(ss -lpn | grep -F "pid=$gwPOAProcess" |awk '{print $5}' | grep -E '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | sort -u | sed -E ':a;N;$!ba;s/\r{0,1}\n/\\n/g' )
        if [[ -n "$gwPOAListener" ]]
        then
            if [[ "$debug" -eq 1 ]]
            then
                echo "DEBUG:We found atleast one $SERVICE gwPOA listener: $gwPOAListener" >&2
            fi
            echo "P \"$SERVICE POA\" status=1;;;1 $SERVICE Post Office Agent is running with PID: $gwPOAProcess and listening.\n $gwPOAListener"
        else
            if [[ "$debug" -eq 1 ]]
            then
                echo "DEBUG:We found no listeners for the $SERVICE gwPOA process with process ID: $gwPOAProcess" >&2
            fi
            echo "P \"$SERVICE POA\" status=0.5;;;1 $SERVICE Post Office Agent is running with PID: $gwPOAProcess but not listening."
        fi
    else
        if [[ "$debug" -eq 1 ]]
        then
            echo "DEBUG: $SERVICE gwPOA is enabled in config, but no processes could be found." >&2
        fi
        echo "P \"$SERVICE POA\" status=0;;;1 $SERVICE Post Office Agent process is not Running."
    fi
fi

if [[ "$gwIA" -eq 1 ]]
then
     if [[ "$debug" -eq 1 ]]
    then
        echo "DEBUG: $SERVICE gwIA is enabled in config, checking for the process." >&2
    fi
    gwIAProcess=$(pgrep -x gwia)
    if [[ -n "$gwIAProcess" ]]
    then
        gwIAListener=$(ss -lpn | grep -F "pid=$gwIAProcess" |awk '{print $5}' | grep -E '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | sort -u | sed -E ':a;N;$!ba;s/\r{0,1}\n/\\n/g')
        if [[ -n "$gwIAListener" ]]
        then
            if [[ "$debug" -eq 1 ]]
            then
                echo "DEBUG:We found atleast one $SERVICE gwIA listener: $gwIAListener" >&2
            fi
            echo "P \"$SERVICE GWIA\" status=1;;;1 $SERVICE Internet Agent is running with PID: $gwIAProcess and listening.\n $gwIAListener"
        else
            if [[ "$debug" -eq 1 ]]
            then
                echo "DEBUG:We found no listeners for the $SERVICE gwIA process with process ID: $gwIAProcess" >&2
            fi
            echo "P \"$SERVICE GWIA\" status=0.5;;;1 $SERVICE Internet Agent is running with PID: $gwIAProcess but not listening."
        fi
    else
        if [[ "$debug" -eq 1 ]]
        then
            echo "DEBUG: $SERVICE gwIA is enabled in config, but no processes could be found." >&2
        fi
        echo "P \"$SERVICE GWIA\" status=0;;;1 $SERVICE Internet Agent process is not Running."
    fi
fi

gwAdminProcess=$(pgrep -f 'gwadmin\.jar')
if [[ -n "$gwAdminProcess" ]]
then
    if [[ "$debug" -eq 1 ]]
    then
        echo "DEBUG:We found a $SERVICE gwAdmin process ID: $gwAdminProcess" >&2
    fi
    gwAdminListener=$(ss -lpn| grep -F "pid=$gwAdminProcess" | awk '{print $5}' | grep -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | sort -u | sed 's/^::ffff://' | sed -E ':a;N;$!ba;s/\r{0,1}\n/\\n/g')
    if [[ -n "$gwAdminListener" ]]
    then
        if [[ "$debug" -eq 1 ]]
        then
            echo "DEBUG:We found atleast one $SERVICE gwAdmin listener: $gwAdminListener" >&2
        fi
        echo "P \"$SERVICE AdminService\" status=1;;;1 $SERVICE AdminService process is running with PID: $gwAdminProcess and listening.\n $gwAdminListener"
    else
        if [[ "$debug" -eq 1 ]]
        then
            echo "DEBUG:We found no listeners for the $SERVICE gwAdminService process with process ID: $gwAdminProcess" >&2
        fi
        echo "P \"$SERVICE AdminService\" status=0.5;;;1 $SERVICE AdminService is running with PID: $gwAdminProcess but not listening."
    fi
else
    echo "P \"$SERVICE AdminService\" status=0;;;1 $SERVICE AdminService process is not Running."
fi