Imported Upstream version 93u+upstream

1 files changed, 80 insertions, 0 deletions

diff --git a/src/lib/libast/comp/setpgid.c b/src/lib/libast/comp/setpgid.c
new file mode 100644
index 0000000..c966919
--- /dev/null
+++ b/src/lib/libast/comp/setpgid.c
@@ -0,0 +1,80 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              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