Retooled dropbox init file to work with dropbox systemd systemunit file. Should be in /bin as /bin/dropbox with permission 755, see my unit file here: https://gist.github.com/kbrnsr/3984a0b45dcce5430d01

dropbox

#!/bin/sh

# To configure, add line with DROPBOX_USERS="user1 user2" to /etc/sysconfig/dropbox
# Probably should use a dropbox group in /etc/groups instead.

# Source function library.
. /etc/rc.d/init.d/functions

prog=dropboxd
lockfile=${LOCKFILE-/var/lock/subsys/$prog}
RETVAL=0

start() {
    echo -n $"Starting $prog"
    if [ -z $DROPBOX_USERS ] ; then
        echo -n ": unconfigured: $config"
        echo_failure
        echo
        rm -f ${lockfile} ${pidfile}
        RETURN=6
        return $RETVAL
    fi
    for dbuser in $DROPBOX_USERS; do
        dbuser_home=`cat /etc/passwd | grep "^$dbuser:" | cut -d":" -f6`
        daemon --user $dbuser /bin/sh -c "$dbuser_home/.dropbox-dist/dropboxd&"
    done
    RETVAL=$?
    echo
    [ $RETVAL = 0 ] && touch ${lockfile}
    return $RETVAL
}

status() {
    for dbuser in $DROPBOX_USERS; do
        dbpid=`pgrep -u $dbuser dropbox | grep -v grep`
        if [ -z $dbpid ] ; then
            echo "dropboxd for USER $dbuser: not running."
        else
            echo "dropboxd for USER $dbuser: running (pid $dbpid)"
        fi
    done
}
stop() {
    echo -n $"Stopping $prog"
    for dbuser in $DROPBOX_USERS; do
        dbuser_home=`cat /etc/passwd | grep "^$dbuser:" | cut -d":" -f6`
        killproc $dbuser_home/.dropbox-dist/dropbox
    done
    RETVAL=$?
    echo
    [ $RETVAL = 0 ] && rm -f ${lockfile} ${pidfile}
}

# See how we were called.
case "$1" in
    start)
        start
        ;;
    status)
        status
        ;;
    stop)
        stop
        ;;
    restart)
        stop
        start
        ;;
    *)
        echo $"Usage: $prog {start|status|stop|restart}"
        RETVAL=3
esac

What's the original init file this one is based of?