1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 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