RE: [Perl-unix-users] Spawning a process

[Steve Aaron]

Title: RE: [Perl-unix-users] Spawning a process

Okay,

        if you don't want to wait on the child processes, what you need is to make each child a daemon process. Have a look at the POSIX module and in particular the setsid function, this will detach you child process from its parent. You may want to do other standard daemon stuff like changing directory to root and redirecting STDIN,STDOUT and STDERR.

 

Cheers

 

Steve Aaron

    -----Original Message-----
From: Costa, Michael J. [mailto:[EMAIL PROTECTED]]
Sent: Monday, December 17, 2001 7:42 PM
To: 'Steve Aaron'; '[EMAIL PROTECTED]'
Subject: RE: [Perl-unix-users] Spawning a process

I thought about that. Are you not however taking a chance if the parent does not wait for the child process to complete? I believe the term is zombies?

 

In my case, I want the parent to run to completion and terminate without worrying about the child.

 

 

Mike

 

Michael J. Costa
Consolidated Edison of New York
IR - Network Systems

[EMAIL PROTECTED]
212.460.2994

-----Original Message-----
From: Steve Aaron [mailto:[EMAIL PROTECTED]]
Sent: Monday, December 17, 2001 01:35 PM
To: 'Costa, Michael J.'; '[EMAIL PROTECTED]'
Subject: RE: [Perl-unix-users] Spawning a process

Try,
   If I have understood correctly, I think you want "fork", see perlfunc for documentation. That will fork off a child process while allowing the parent to carry on processing.

Steve Aaron

-----Original Message-----
From: Costa, Michael J. [mailto:[EMAIL PROTECTED]]
Sent: Monday, December 17, 2001 3:46 PM
To: '[EMAIL PROTECTED]'
Subject: [Perl-unix-users] Spawning a process

Good Morning All:

I am using perl on a Sun Solaris server to do data transfer with outside
companies. With one of the companies I exchange data with, the files must be
sent in a particular order. What I want to do is when the last file in the
chain is received on my server it will kick-off automated processing.

The automated processing will begin encrypting the files and staging them to
be send to our trading partner. As processing is completed on one file, I
want the perl script that is running to kick off a successor job (which will
be the same perl script with different parms) to process the next file in
the chain. This process need not return to the script which called it. I do
however what the "spawning" script to run to completion.

Did that make any sense?

I've tried system which will wait until the called process completes before
continuing. (Don't want that)

I've tried exec which seems to put the calling process into limbo or end the
process? (Don't want that either)

Anybody got any ideas?

Thanks

Michael J. Costa
Consolidated Edison of New York
IR - Network Systems

[EMAIL PROTECTED]
212.460.2994

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