vnckill

#!/bin/bash
if [ $# -eq 0 ]; then
    ps -aux|awk -F'[ ]+' 'match($11,/vnc/){printf("    %s,%s,%s,%s\n",$1,$2,$11,$12)}'
fi

for i in $@;do
    dispport="$i"
    echo "kill svn display port $dispport"
    port=${dispport:1}
    if [ ${dispport:0:1} != ":" ]; then
        echo "the display port should start with :"
        continue
    fi 
    file1=/tmp/.X${port}-lock
    file2=/tmp/.X11-unix/X${port}
    if [ -f $file1 ];then
        pid=`cat $file1`
    else
        pid=0
    fi

    #rm the file first, in case this bash is killing the process himself hosted
    #here we need the root permission, because the target Xvnc may started by the other users.    
    if [ -f $file1 ];then
        echo "--delete lock file $file1"
        sudo rm -f $file1
    else
        echo "--lock file $file1 not exists"
    fi

    if [ -e $file2 ];then
        echo "--delete lock file $file2"
        sudo rm -f $file2
    else
        echo "--lock file $file2 not exists"
    fi

    #kill the Xvnc process if it exists
    newpid=`ps -aux | awk -F'[ ]+' -v dispport="$dispport" -v pid="$pid" 'match($11, /vnc/)&&$12==dispport&&(pid==0||pid==$2){print $2}'`    
    if [[ -n ${newpid} ]]; then
    #if [ ${#newpid} -ne 0 ]; then
        echo "--kill -9 $newpid"
        sudo kill -9 $newpid
    elif [ $( echo "$pid" ) -ne 0 ]; then
        echo "--process PID $pid not exists."
    fi
done
#exit 0