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NetBSD 6.1.5 - man page for wait (netbsd section 1)

WAIT(1) 			   BSD General Commands Manual				  WAIT(1)

     wait -- await process completion

     wait [pid]

     If invoked with no arguments, the wait utility waits until all existing child processes in
     the background have terminated.

     Available operands:

     pid     If a pid operand is specified, and it is the process ID of a background child
	     process that still exists, the wait utility waits until that process has completed
	     and consumes its status information, without consuming the status information of any
	     other process.

	     If a pid operand is specified that is not the process ID of a child background
	     process that still exists, wait exits without waiting for any processes to complete.

     The wait utility exits with one of the following values:

     0	     The wait utility was invoked with no operands and all of the existing background
	     child processes have terminated, or the process specified by the pid operand exited
	     normally with 0 as its exit status.

     >0      The specified process did not exist and its exit status information was not avail-
	     able, or the specified process existed or its exit status information was available,
	     and it terminated with a non-zero exit status.

     If the specified process terminated abnormally due to the receipt of a signal, the exit sta-
     tus information of wait contains that termination status as well.

     The wait command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.

BSD					   June 5, 1993 				      BSD

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