t_ttypty.c revision 314817 
1/* $NetBSD: t_ttypty.c,v 1.2 2017/01/13 21:30:41 christos Exp $ */
2
3/*-
4 * Copyright (c) 2002, 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Luke Mewburn and Jaromir Dolecek.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__COPYRIGHT("@(#) Copyright (c) 2008\
34 The NetBSD Foundation, inc. All rights reserved.");
35__RCSID("$NetBSD: t_ttypty.c,v 1.2 2017/01/13 21:30:41 christos Exp $");
36
37#include <sys/event.h>
38#include <sys/wait.h>
39
40#include <fcntl.h>
41#include <poll.h>
42#include <stdio.h>
43#include <stdlib.h>
44#include <termios.h>
45#include <unistd.h>
46#include <util.h>
47
48#include <atf-c.h>
49
50#include "h_macros.h"
51
52static void
53h_check(bool check_master)
54{
55	char slavetty[1024];
56	char buffer[128];
57	struct kevent event[1];
58	struct pollfd pfd;
59	pid_t child;
60	int status, kq, n;
61	int amaster, aslave, acurrent;
62
63	RL(openpty(&amaster, &aslave, slavetty, NULL, NULL));
64	(void)printf("tty: openpty master %d slave %d tty '%s'\n",
65	    amaster, aslave, slavetty);
66	acurrent = check_master ? amaster : aslave;
67
68	RL(child = fork());
69	if (child == 0) {
70		(void)sleep(1);
71
72		n = read(check_master ? aslave : amaster, buffer, 128);
73		(void)printf("tty: child  read '%.*s'\n", n, buffer);
74
75		_exit(0);
76	}
77
78	pfd.fd = acurrent;
79	pfd.events = POLLOUT;
80	(void)printf("tty: polling ...\n");
81	RL(poll(&pfd, 1, INFTIM));
82	(void)printf("tty: returned from poll - %d\n", pfd.revents);
83
84	RL(kq = kqueue());
85
86	EV_SET(&event[0], acurrent, EVFILT_WRITE, EV_ADD|EV_ENABLE, 0, 0, 0);
87	RL(kevent(kq, event, 1, NULL, 0, NULL));
88
89	RL(n = kevent(kq, NULL, 0, event, 1, NULL));
90
91	(void)printf("kevent num %d filt %d flags: %#x, fflags: %#x, data: "
92	    "%" PRId64 "\n", n, event[0].filter, event[0].flags, event[0].fflags,
93	    event[0].data);
94
95	ATF_REQUIRE_EQ(event[0].filter, EVFILT_WRITE);
96
97	RL(n = write(acurrent, "f00\n", 4));
98	(void)printf("tty: wrote 'f00\\n' (wrote %d characters)\n", n);
99
100	(void)waitpid(child, &status, 0);
101	(void)printf("tty: successful end\n");
102}
103
104ATF_TC(master);
105ATF_TC_HEAD(master, tc)
106{
107	atf_tc_set_md_var(tc, "descr", "Checks EVFILT_WRITE for master tty");
108}
109ATF_TC_BODY(master, tc)
110{
111	h_check(true);
112}
113
114ATF_TC(slave);
115ATF_TC_HEAD(slave, tc)
116{
117	atf_tc_set_md_var(tc, "descr", "Checks EVFILT_WRITE for slave tty");
118}
119ATF_TC_BODY(slave, tc)
120{
121	h_check(false);
122}
123
124ATF_TP_ADD_TCS(tp)
125{
126	ATF_TP_ADD_TC(tp, master);
127	ATF_TP_ADD_TC(tp, slave);
128
129	return atf_no_error();
130}
131