===================================================================
RCS file: /cvs/prex-old/usr/lib/posix/process/setgid.c,v
retrieving revision 1.1.1.1
retrieving revision 1.1.1.1.2.1
diff -u -r1.1.1.1 -r1.1.1.1.2.1
--- prex-old/usr/lib/posix/process/setgid.c	2008/06/03 10:38:50	1.1.1.1
+++ prex-old/usr/lib/posix/process/setgid.c	2008/08/13 17:12:40	1.1.1.1.2.1
@@ -36,6 +36,7 @@
 
 	if (gid == 1)
 		return 0;
-	errno = EINVAL;
+
+	errno = EPERM;
 	return -1;
 }