xref: /freebsd/contrib/netbsd-tests/kernel/kqueue/write/t_ttypty.c (revision 7fdf597e96a02165cfe22ff357b857d5fa15ed8a)
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 
52 static void
53 h_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 
104 ATF_TC(master);
105 ATF_TC_HEAD(master, tc)
106 {
107 	atf_tc_set_md_var(tc, "descr", "Checks EVFILT_WRITE for master tty");
108 }
109 ATF_TC_BODY(master, tc)
110 {
111 	h_check(true);
112 }
113 
114 ATF_TC(slave);
115 ATF_TC_HEAD(slave, tc)
116 {
117 	atf_tc_set_md_var(tc, "descr", "Checks EVFILT_WRITE for slave tty");
118 }
119 ATF_TC_BODY(slave, tc)
120 {
121 	h_check(false);
122 }
123 
124 ATF_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