trouble using wait3

From: Michael R. Kline <mike_at_lib.utexas.edu>
Date: Tue, 19 Mar 1996 09:24:11 -0600

Hello Gurus,

I tried searching the archive at Stanford for this but the search
utility is currently down, so if this has been covered before, please
forgive me.

I am writing code for a process that will fork and I tried the following
code for cleaning up zombie processes (found in Internetworking with
TCP/IP by Comer & Stevens):

#include <sys/types.h>
#include <sys/resource.h>
#include <sys/wait.h>

/*----------------------------------------------------------------------*/
/* reaper - clean up zombie children
*/
/*----------------------------------------------------------------------*/

int
reaper()
{
        union wait status;

        while (wait3(&status, WNOHANG, (struct rusage *)0) >= 0)
                        /* empty */;
}



when compiling this code I get the following error:

/usr/lib/cmplrs/cc/cfe: Error: TCPechod.c, line 100: storage size for
'status' isn't known
        union wait status;
        ---------- ^



Now, if I add the union wait definition from <sys/wait.h> to my code it
compiles fine. What gives?????


Mike

-- 
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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         Michael R. Kline                        mike_at_lib.utexas.edu
         General Libraries                      Office: (512) 495-4391
         University of Texas at Austin          FAX   : (512) 495-4347
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Received on Tue Mar 19 1996 - 16:54:51 NZST