How to search a digit i.e process id in tcl and kill the process id

Question

I have tried to search process id i-e 6762 stored in a variable say buffer

nohup tcpdump -ni  eth0 -s0  2>&1          


        

Answer 1

If you want to try to kill it,

try {
    exec sh -c "kill -0 $pid && kill $pid"
} on error e {
    puts "could not kill $pid: $e"
}

The kill -0 $pid is just a test to see if such a pid is running.