synclient

#!/usr/bin/env bash
# This is a shell script to start and stop the Synergy client
# Written and tested on Fedora 28

# Set some default values to be used later
# Set this IP address to the IP address of the system running Synergy server
SERVER="172.16.1.30"

# Set some help text to be displayed if needed
HELP="synclient [ start | stop | status ]"

# Check for correct parameters (exactly one sub-command expected)
if [ "$#" -ne 1 ]; then
    echo "Incorrect number of parameters; please provide exactly one valid subcommand"
    echo $HELP
    exit 1
fi

# Set the name of the subcommand supplied by the user
CMD=$1

# Check for existence of synergy-core and get path if present
if hash synergy-core 2>/dev/null; then
    SYNCMD=$(command -v synergy-core)
else
    echo "synergy-core is required but not found, aborting"
    exit 1
fi

# Match against the supplied subcommand
case $CMD in
    start)
        if pgrep -x "synergy-core" > /dev/null 2>&1; then
            echo "Synergy is already running"
            exit 1
        else
            echo "Starting Synergy..."
            $SYNCMD --client $SERVER > /dev/null 2>&1
            exit 0
        fi
        ;;
    stop)
        echo "Stopping Synergy..."
        pkill -x "synergy-core" > /dev/null 2>&1
        exit 0
        ;;
    status)
        if pgrep -x "synergy-core" > /dev/null 2>&1; then
            echo "Synergy is running"
            exit 0
        else
            echo "Synergy is not running"
            exit 0
        fi
        ;;
    help)
        echo $HELP
        exit 0
        ;;
    --help)
        echo $HELP
        exit 0
        ;;
    *)
        echo "Unrecognized subcommand"
        echo $HELP
        exit 1
esac