Programming

Hi!
I'm newbi in the Unix. I've a C++ Program from where one shell gets executed. Sample C++ code is --

transactionID = 1199;

case 1199:
//*************************************************
// Received the suspend signal.
//*************************************************
//Call monitoring script, to check proper end of maintstaticloader
if (fork() == 0)
{
execlp("monTx1199.sh", "monTx1199.sh", (char *)0);
exit(0);
}

Name of the C++ program is - MAINRCVR.cpp.

And, in the shell i've the following code --

PROCESS=${BINDIR}/DRCVR/MAINTRCVR

---------------
Some more process
---------------

maintrcvr_pid=`ps -ef | grep -v grep | grep "${PROCESS}" | awk '{print $2}'`
kill -s SIGCONT $maintrcvr_pid

-But, Even if i kill this process - it is still showing defunct table. We have done test runs of this and it seems to run fine, but all of a sudden after some days of running i see that there are almost 1000 of defunct processes. I've tried --

kill -9 $maintrcvr_pid

But, nothing happen. Pls give me some suggestion in this regard. Thanks in advance.

Satyaki De.

May try the following

if (fork() == 0) //Child of the main code
{
if (fork()> 0) //Another process is created.(Grandchild)
exit(0); //1st child(ret val of fork >0) exits making the Grandchild orphan so it will not be zombie.
execlp("monTx1199.sh", "monTx1199.sh", (char *)0);
//Above line is executed in the grand child whose status will be retrieved by init.

}
wait(&status) ; // In the main code where status is an int variable.
//or waitpid function to wait for a specific child.
//that means we need not wait for the Grandchild to complete , which will run the shell script.

Refer Stevens (Advanced Programming in the Unix environment , Process Control Chapter)

Hi!
Thanks for your reply.

Regards.

Satyaki De.