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Difference between Fork and Vfork

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Operating Systems Linux Difference between Fork and Vfork
# 1  
Old 04-17-2012
Difference between Fork and Vfork
Hello Forum members,



What is the prime difference between fork and Vfork and when to prefer in our aapications this Vfork.


Thanks
Siva Ranganath
Last edited by workforsiva; 04-17-2012 at 01:23 AM.. Reason: For thanks
# 2  
Old 04-17-2012
fork() copies everything from the parent process to the child, vfork() is a special instance of clone(), and does not copy all process information. vfork is meant solely as a low-impact way to call exec() to create a new process. clone() was originally meant for creating threads because early Linux threads were really separate child processes with special tweaks, not LWP's still associated with the parent.

You cannot do anything in the child process after a vfork() call except to call exit() or to call one of the exec() family. fork() lets you continue running the child, if you want.
# 3  
Old 04-18-2012
Thanks Jim mcnamara and Unix forum.
Thanks for ur quick reply with good explanination. as i am facing interviews on linux . iam looking more help from Forum memebers.
Thanks once agin Jim mcnamara sir. iam looking same help for further queries.
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