Shell Programming and Scripting

#!/bin/sh
trap "cleanup" TERM
timeout=5
mainpid=$$
cleanup()
{
    echo "at $i interupt"
    kill -9 0 
}


watchdog()
{
    sleep $1
}


(watchdog $timeout && kill -TERM $mainpid) & 

run_test()
{
for i in `seq 1 100`
do
        sleep 1 
       # i=$((i+1))
    echo "$i,contiuing"
done
}

run_test |tee -a x.log

1,contiuing
2,contiuing
3,contiuing
4,contiuing
at 5 interupt
Killed: 9

lyang001@lyang001-OptiPlex-9010:~/nehalem_workdir$ echo $SHELL
/bin/bash

root@lyang001-OptiPlex-9010:/home/lyang001/del# ./zz.sh 
1,contiuing
2,contiuing
3,contiuing
4,contiuing
5,contiuing
6,contiuing
7,contiuing
8,contiuing
9,contiuing
10,contiuing
11,contiuing
12,contiuing
13,contiuing
14,contiuing
......
......

mainpid=$$

(watchdog $timeout && kill -TERM $mainpid)

run_test(){
}