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Syntax
Definition and UsageWaits for the child process with ID PID to terminate, returning the process ID of the deceased process. If PID does not exist, then it returns -1. The exit status of the process is contained in $?. The flags can be set to various values which are equivalent to those used by the waitpid() UNIX system call. A value of 0 for FLAGS should work on all operating systems that support processes. Return Value
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