1N/A/*********************************************************************** 1N/A* This software is part of the ast package * 1N/A* Copyright (c) 1985-2011 AT&T Intellectual Property * 1N/A* and is licensed under the * 1N/A* Common Public License, Version 1.0 * 1N/A* by AT&T Intellectual Property * 1N/A* A copy of the License is available at * 1N/A* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 1N/A* Information and Software Systems Research * 1N/A* Glenn Fowler <gsf@research.att.com> * 1N/A* David Korn <dgk@research.att.com> * 1N/A* Phong Vo <kpv@research.att.com> * 1N/A***********************************************************************/ 1N/A * spawnveg -- spawnve with process group or session control 1N/A * pgid <0 setsid() [session group leader] 1N/A * 0 nothing [retain session and process group] 1N/A * 1 setpgid(0,0) [process group leader] 1N/A * >1 setpgid(0,pgid) [join process group] 1N/A * fork+exec+(setsid|setpgid) 1N/A * parent and child are in a race here