/*********************************************************************** * * * This software is part of the ast package * * Copyright (c) 1985-2007 AT&T Knowledge Ventures * * and is licensed under the * * Common Public License, Version 1.0 * * by AT&T Knowledge Ventures * * * * A copy of the License is available at * * http://www.opensource.org/licenses/cpl1.0.txt * * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * * * * Information and Software Systems Research * * AT&T Research * * Florham Park NJ * * * * Glenn Fowler <gsf@research.att.com> * * David Korn <dgk@research.att.com> * * Phong Vo <kpv@research.att.com> * * * ***********************************************************************/ #pragma prototyped #include <ast.h> #if _lib_setpgid NoN(setpgid) #else #include <error.h> #ifndef ENOSYS #define ENOSYS EINVAL #endif #if _lib_setpgrp2 #define setpgrp setpgrp2 #else #if _lib_BSDsetpgrp #define _lib_setpgrp2 1 #define setpgrp BSDsetpgrp #else #if _lib_wait3 #define _lib_setpgrp2 1 #endif #endif #endif #if _lib_setpgrp2 extern int setpgrp(int, int); #else extern int setpgrp(void); #endif /* * set process group id */ int setpgid(pid_t pid, pid_t pgid) { #if _lib_setpgrp2 return(setpgrp(pid, pgid)); #else #if _lib_setpgrp int caller = getpid(); if ((pid == 0 || pid == caller) && (pgid == 0 || pgid == caller)) return(setpgrp()); errno = EINVAL; #else errno = ENOSYS; #endif return(-1); #endif } #endif