The steps for the script are as below:
1. Fork the main process into Child & Parent processes.
2. Child (PID ==0) will do some processing (testing that can be conformance or use case anything)
3. Meanwhile parent will run a timer that will have a count set at starting of script
4. If the child process completes before the final count then we have to stop the timer that runs on the parent process
5. If the Child process does not complete before the count (i.e in case the child process hangs) then the parent process will kill the child process.
I don’t have any problem executing step 5. That works totally fine.

The only problem is to execute step 4 that I’m not able to stop the timer on parent process if the child process completes before timer reaches its final count. The parent has to stop the timer if the child process ends before the timer reaches final count.

if (!defined($kidpid = fork())){
      # fork returned undef, so failed
      die "cannot fork: $!";
}elsif ($kidpid == 0) 
{
      # fork returned 0, so this branch is the child
      $TestResult = &$TEST_PROCESS($_[0], $_[1]);    
# &$TEST_PROCESS is a subroutine that is written in some other file th
+at will return 1 if success 
        exit;  # terminate the child thread...
} 
else
{
       for ($timer=0;$timer<=$TEST_TIMEOUT;$timer++)
       {

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Here I want to check the status of the child process .i.e. if it is running or not. If the child process does not end before $TEST_TIMEOUT(defined in another script) I want to kill the child process.

The only problem I face is how to check the status of the child process.

Can i share a varible between the child & parent process that will get updated when the child process completes?
     }
}

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Edited by planetscape - fixed code tags

In reply to is sharing variables between forked process possible?? by sagar_kempe

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