1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                 Eclipse Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *          http://www.eclipse.org/org/documents/epl-v10.html           *
11 *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12 *                                                                      *
13 *              Information and Software Systems Research               *
14 *                            AT&T Research                             *
15 *                           Florham Park NJ                            *
16 *                                                                      *
17 *                 Glenn Fowler <gsf@research.att.com>                  *
18 *                  David Korn <dgk@research.att.com>                   *
19 *                   Phong Vo <kpv@research.att.com>                    *
20 *                                                                      *
21 ***********************************************************************/
22 #pragma prototyped
23 
24 #include <ast.h>
25 
26 #if _lib_vfork
27 
28 NoN(vfork)
29 
30 #else
31 
32 #include <error.h>
33 
34 #ifndef ENOSYS
35 #define ENOSYS		EINVAL
36 #endif
37 
38 #undef	vfork
39 
40 #if defined(__EXPORT__)
41 #define extern	__EXPORT__
42 #endif
43 
44 extern pid_t
45 vfork(void)
46 {
47 #if _lib_fork
48 	return(fork());
49 #else
50 	errno = ENOSYS;
51 	return -1;
52 #endif
53 }
54 
55 #endif
56