1 /* $NetBSD: t_ttyio.c,v 1.3 2017/01/10 01:31:40 christos Exp $ */
2
3 /*
4 * Copyright (c) 2001, 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Andrew Brown.
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_ttyio.c,v 1.3 2017/01/10 01:31:40 christos Exp $");
36
37 #include <sys/types.h>
38 #include <sys/wait.h>
39
40 #include <err.h>
41 #include <errno.h>
42 #include <signal.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <termios.h>
47 #include <unistd.h>
48
49 #if defined(__NetBSD__)
50 #include <util.h>
51 #elif defined(__bsdi__)
52 int openpty(int *, int *, char *, struct termios *, struct winsize *);
53 #elif defined(__FreeBSD__)
54 #include <libutil.h>
55 #else
56 #error where openpty?
57 #endif
58
59 #include <atf-c.h>
60
61 #define REQUIRE_ERRNO(x, v) ATF_REQUIRE_MSG(x != v, "%s: %s", #x, strerror(errno))
62
63 ATF_TC(ioctl);
ATF_TC_HEAD(ioctl,tc)64 ATF_TC_HEAD(ioctl, tc)
65 {
66 atf_tc_set_md_var(tc, "descr",
67 "Checks that ioctl calls are restarted "
68 "properly after being interrupted");
69 }
70
71 /* ARGSUSED */
72 static void
sigchld(int nsig)73 sigchld(int nsig)
74 {
75 REQUIRE_ERRNO(wait(NULL), -1);
76 }
77
ATF_TC_BODY(ioctl,tc)78 ATF_TC_BODY(ioctl, tc)
79 {
80 int m, s, rc;
81 char name[128], buf[128];
82 struct termios term;
83 struct sigaction sa;
84
85 /* unbuffer stdout */
86 setbuf(stdout, NULL);
87
88 /*
89 * Create default termios settings for later use
90 */
91 memset(&term, 0, sizeof(term));
92 term.c_iflag = TTYDEF_IFLAG;
93 term.c_oflag = TTYDEF_OFLAG;
94 term.c_cflag = TTYDEF_CFLAG;
95 term.c_lflag = TTYDEF_LFLAG;
96 cfsetspeed(&term, TTYDEF_SPEED);
97
98 /* get a tty */
99 REQUIRE_ERRNO(openpty(&m, &s, name, &term, NULL), -1);
100
101 switch (fork()) {
102 case -1:
103 atf_tc_fail("fork(): %s", strerror(errno));
104 /* NOTREACHED */
105 case 0:
106 /* wait for parent to get set up */
107 (void)sleep(1);
108 (void)printf("child1: exiting\n");
109 exit(0);
110 /* NOTREACHED */
111 default:
112 (void)printf("parent: spawned child1\n");
113 break;
114 }
115
116 switch (fork()) {
117 case -1:
118 atf_tc_fail("fork(): %s", strerror(errno));
119 /* NOTREACHED */
120 case 0:
121 /* wait for parent to get upset */
122 (void)sleep(2);
123 /* drain the tty q */
124 if (read(m, buf, sizeof(buf)) == -1)
125 err(1, "read");
126 (void)printf("child2: exiting\n");
127 exit(0);
128 /* NOTREACHED */
129 default:
130 (void)printf("parent: spawned child2\n");
131 break;
132 }
133
134 /* set up a restarting signal handler */
135 (void)sigemptyset(&sa.sa_mask);
136 sa.sa_handler = sigchld;
137 sa.sa_flags = SA_RESTART;
138 REQUIRE_ERRNO(sigaction(SIGCHLD, &sa, NULL), -1);
139
140 /* put something in the output q */
141 REQUIRE_ERRNO(write(s, "Hello world\n", 12), -1);
142
143 /* ask for output to drain but don't drain it */
144 rc = 0;
145 if (tcsetattr(s, TCSADRAIN, &term) == -1) {
146 (void)printf("parent: tcsetattr: %s\n", strerror(errno));
147 rc = 1;
148 }
149
150 /* wait for last child */
151 sa.sa_handler = SIG_DFL;
152 REQUIRE_ERRNO(sigaction(SIGCHLD, &sa, NULL), -1);
153 (void)wait(NULL);
154
155 (void)close(s);
156 ATF_REQUIRE_EQ(rc, 0);
157 }
158
ATF_TP_ADD_TCS(tp)159 ATF_TP_ADD_TCS(tp)
160 {
161 ATF_TP_ADD_TC(tp, ioctl);
162
163 return atf_no_error();
164 }
165