Re^2: Restarting perl script by itself

Thanks.
As per my understanding, exec will launch the new process, which should have a different process id than the parent process and parent process will not wait for the child process to complete.

And, when the script complete, the parent process will be automatically killed.

Let me know, what I am doing wrong.

Comment on Re^2: Restarting perl script by itself

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Re^3: Restarting perl script by itself by zentara (Cardinal) on Sep 16, 2011 at 17:24 UTC
As per my understanding, exec will launch the new process No, exec *replaces* your current process.... a subtle difference. I'm not really a human, but I play one on earth. Old Perl Programmer Haiku ................... flash japh	[reply]
Re^4: Restarting perl script by itself by manua (Novice) on Sep 16, 2011 at 19:31 UTC
Thanks, thats the point I was missing.	[reply]
Re^3: Restarting perl script by itself by afoken (Chancellor) on Sep 16, 2011 at 17:28 UTC
exec replaces one process with another one, keeping the PID, file descriptors, environment and so on. No single command launches a child process, keeping the parent process paralysed, and finally kills the helpless parent. Simply because that would be very inefficient. You should really RTFM, especially fork, exec, and system. Also read wait and waitpid. Understanding the concept of fork and exec is essential for writing software on Unix-like systems. Alexander -- Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)	[reply]