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 <poll.h>
41#include <stdio.h>
42#include <termios.h>
43#include <unistd.h>
44#include <util.h>
45
46#include <atf-c.h>
47
48#include "h_macros.h"
49
50static void
51h_check(bool check_master)
52{
53	char slavetty[1024];
54	char buffer[128];
55	struct kevent event[1];
56	pid_t child;
57	int amaster, aslave, acurrent;
58	int kq, n, status;
59#if 0
60	int fl;
61#endif
62	struct pollfd pfd;
63	struct termios tio;
64
65	RL(openpty(&amaster, &aslave, slavetty, NULL, NULL));
66
67	(void)printf("tty: openpty master %d slave %d tty '%s'\n",
68		amaster, aslave, slavetty);
69	acurrent = check_master ? amaster : aslave;
70
71	RL(child = fork());
72	if (child == 0) {
73		sleep(1);
74
75		(void)printf("tty: child writing 'f00\\n'\n");
76		(void)write(check_master ? aslave : amaster, "f00\n", 4);
77
78		_exit(0);
79	}
80
81	/* switch ONLCR off, to not get confused by newline translation */
82	RL(tcgetattr(acurrent, &tio));
83	tio.c_oflag &= ~ONLCR;
84	RL(tcsetattr(acurrent, TCSADRAIN, &tio));
85
86	pfd.fd = acurrent;
87	pfd.events = POLLIN;
88	(void)printf("tty: polling ...\n");
89	RL(poll(&pfd, 1, INFTIM));
90	(void)printf("tty: returned from poll - %d\n", pfd.revents);
91
92#if 0
93	fl = 1;
94	if (ioctl(acurrent, TIOCPKT, &fl) < 0)
95		err(1, "ioctl");
96#endif
97
98	RL(kq = kqueue());
99
100	EV_SET(&event[0], acurrent, EVFILT_READ, EV_ADD|EV_ENABLE, 0, 0, 0);
101	RL(kevent(kq, event, 1, NULL, 0, NULL));
102
103	RL(n = kevent(kq, NULL, 0, event, 1, NULL));
104
105	(void)printf("kevent num %d filt %d flags: %#x, fflags: %#x, "
106#ifdef __FreeBSD__
107	    "data: %" PRIdPTR "\n", n, event[0].filter, event[0].flags,
108#else
109	    "data: %" PRId64 "\n", n, event[0].filter, event[0].flags,
110#endif
111	    event[0].fflags, event[0].data);
112
113	ATF_REQUIRE_EQ(event[0].filter, EVFILT_READ);
114
115	RL(n = read(acurrent, buffer, 128));
116	(void)printf("tty: read '%.*s' (n=%d)\n", n, buffer, n);
117
118	(void)waitpid(child, &status, 0);
119	(void)printf("tty: successful end\n");
120}
121
122ATF_TC(master);
123ATF_TC_HEAD(master, tc)
124{
125	atf_tc_set_md_var(tc, "descr", "Checks EVFILT_READ for master tty");
126}
127ATF_TC_BODY(master, tc)
128{
129	h_check(true);
130}
131
132ATF_TC(slave);
133ATF_TC_HEAD(slave, tc)
134{
135	atf_tc_set_md_var(tc, "descr", "Checks EVFILT_READ for slave tty");
136}
137ATF_TC_BODY(slave, tc)
138{
139	h_check(false);
140}
141
142ATF_TP_ADD_TCS(tp)
143{
144	ATF_TP_ADD_TC(tp, master);
145	ATF_TP_ADD_TC(tp, slave);
146
147	return atf_no_error();
148}
149