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Old 06-30-2008, 05:38 PM   #1
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what is the difference between fork and exec command?

Hi friends,

Can anybody tell me what is the difference between fork and exec command?


Old 06-30-2008, 05:43 PM   #2
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fork executes two child processes, exec turns over execution to a new process.

exec behaves the same as forking a process, then exiting the unforked branch.
Old 06-30-2008, 06:04 PM   #3
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Read the manual.

The exec() family of functions replaces the current process image with a new process image.
[translation: Uses the process structures of the calling process to run a new program.]

fork() creates a new process by duplicating the calling process.

Simple really - they don't have anything to do with eachother.


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