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What does waitpid () do?
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What does waitpid () do?
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What is the use of waitpid()?
It's used generally to wait until a specific process finishes (or otherwise changes state if you're using special flags), based on its process ID (otherwise known as a pid).
It can also be used to wait for any of a group of child processes, either one from a specific process group or any child of the current process.
See here for the gory details.
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