git.zerfleddert.de Git - micropolis/blob - src/tcl/compat/testwait.c

   1 /*
   2  * testwait.c --
   3  *
   4  *      This file contains a simple program that will compile
   5  *      correctly if and only if <sys/wait.h> defines the
   6  *      type "union wait".  It is used during configuration
   7  *      to determine whether or not to use this type.
   8  *
   9  * Copyright 1991 Regents of the University of California
  10  * Permission to use, copy, modify, and distribute this
  11  * software and its documentation for any purpose and without
  12  * fee is hereby granted, provided that this copyright
  13  * notice appears in all copies.  The University of California
  14  * makes no representations about the suitability of this
  15  * software for any purpose.  It is provided "as is" without
  16  * express or implied warranty.
  17  */
  18
  19 #ifndef lint
  20 static char rcsid[] = "$Header: /user6/ouster/tcl/compat/RCS/testwait.c,v 1.3 91/12/18 13:42:09 ouster Exp $ SPRITE (Berkeley)";
  21 #endif /* not lint */
  22
  23 #include <sys/types.h>
  24 #include <sys/wait.h>
  25
  26 /*
  27  * This code is very tricky, mostly because of weirdness in HP-UX
  28  * where "union wait" is defined in both the BSD and SYS-V
  29  * environments.  Supposedly the WIFEXITED business will do the
  30  * right thing...
  31  */
  32
  33 union wait x;
  34
  35 int main()
  36 {
  37     WIFEXITED(x);               /* Generates compiler error if WIFEXITED
  38                                  * uses an int. */
  39     return 0;
  40 }