Importing NetBSD "Kyua" test framework

To do so, a few dependencies have been imported:

 * external/bsd/lutok
 * external/mit/lua
 * external/public-domain/sqlite
 * external/public-domain/xz

The Kyua framework is the new generation of ATF (Automated Test
Framework), it is composed of:

 * external/bsd/atf
 * external/bsd/kyua-atf-compat
 * external/bsd/kyua-cli
 * external/bsd/kyua-tester
 * tests

Kyua/ATF being written in C++, it depends on libstdc++ which is
provided by GCC. As this is not part of the sources, Kyua is only
compiled when the native GCC utils are installed.

To install Kyua do the following:

 * In a cross-build enviromnent, add the following to the build.sh
   commandline: -V MKBINUTILS=yes -V MKGCCCMDS=yes

WARNING:
  At this point the import is still experimental, and not supported
  on native builds (a.k.a make build).

Change-Id: I26aee23c5bbd2d64adcb7c1beb98fe0d479d7ada

tests/kernel/kqueue/read/t_pipe.c

@@ -0,0 +1,84 @@
+/* $NetBSD: t_pipe.c,v 1.1 2009/02/20 21:39:57 jmmv Exp $ */
+
+/*-
+ * Copyright (c) 2002, 2008 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Luke Mewburn and Jaromir Dolecek.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__COPYRIGHT("@(#) Copyright (c) 2008\
+ The NetBSD Foundation, inc. All rights reserved.");
+__RCSID("$NetBSD: t_pipe.c,v 1.1 2009/02/20 21:39:57 jmmv Exp $");
+
+#include <sys/event.h>
+
+#include <stdio.h>
+#include <unistd.h>
+
+#include <atf-c.h>
+
+#include "../../../h_macros.h"
+
+ATF_TC(pipe);
+ATF_TC_HEAD(pipe, tc)
+{
+	atf_tc_set_md_var(tc, "descr", "Checks EVFILT_READ for pipes");
+}
+ATF_TC_BODY(pipe, tc)
+{
+	struct kevent event[1];
+	char buffer[128];
+	int fds[2];
+	int kq, n;
+
+	RL(pipe(fds));
+	RL(kq = kqueue());
+
+	EV_SET(&event[0], fds[0], EVFILT_READ, EV_ADD|EV_ENABLE, 0, 0, 0);
+	RL(kevent(kq, event, 1, NULL, 0, NULL));
+
+	/* make sure there is something in the pipe */
+	RL(write(fds[1], "foo", 3));
+	(void)printf("pipe: wrote 'foo' to pipe\n");
+
+	RL(n = kevent(kq, NULL, 0, event, 1, NULL));
+	(void)printf("kevent num %d flags: %#x, fflags: %#x, data: "
+	    "%" PRId64 "\n", n, event[0].flags, event[0].fflags, event[0].data);
+
+	RL(n = read(fds[0], buffer, event[0].data));
+	buffer[n] = '\0';
+
+	(void)printf("pipe: read '%s'\n", buffer);
+	(void)printf("pipe: successful end\n");
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+	ATF_TP_ADD_TC(tp, pipe);
+
+	return atf_no_error();
+}