minix/tests/lib/libc/ttyio/t_ttyio.c

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/* $NetBSD: t_ttyio.c,v 1.2 2011/04/19 20:07:53 martin Exp $ */
/*
* Copyright (c) 2001, 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Brown.
*
* 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_ttyio.c,v 1.2 2011/04/19 20:07:53 martin Exp $");
#include <sys/types.h>
#include <sys/wait.h>
#include <err.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#if defined(__NetBSD__)
#include <util.h>
#elif defined(__bsdi__)
int openpty(int *, int *, char *, struct termios *, struct winsize *);
#elif defined(__FreeBSD__)
#include <libutil.h>
#else
#error where openpty?
#endif
#include <atf-c.h>
#define REQUIRE_ERRNO(x, v) ATF_REQUIRE_MSG(x != v, "%s: %s", #x, strerror(errno))
ATF_TC(ioctl);
ATF_TC_HEAD(ioctl, tc)
{
atf_tc_set_md_var(tc, "descr",
"Checks that ioctl calls are restarted "
"properly after being interrupted");
}
/* ARGSUSED */
static void
sigchld(int nsig)
{
REQUIRE_ERRNO(wait(NULL), -1);
}
ATF_TC_BODY(ioctl, tc)
{
int m, s, rc;
char name[128], buf[128];
struct termios term;
struct sigaction sa;
/* unbuffer stdout */
setbuf(stdout, NULL);
/*
* Create default termios settings for later use
*/
memset(&term, 0, sizeof(term));
term.c_iflag = TTYDEF_IFLAG;
term.c_oflag = TTYDEF_OFLAG;
term.c_cflag = TTYDEF_CFLAG;
term.c_lflag = TTYDEF_LFLAG;
cfsetspeed(&term, TTYDEF_SPEED);
/* get a tty */
REQUIRE_ERRNO(openpty(&m, &s, name, &term, NULL), -1);
switch (fork()) {
case -1:
atf_tc_fail("fork(): %s", strerror(errno));
/* NOTREACHED */
case 0:
/* wait for parent to get set up */
(void)sleep(1);
(void)printf("child1: exiting\n");
exit(0);
/* NOTREACHED */
default:
(void)printf("parent: spawned child1\n");
break;
}
switch (fork()) {
case -1:
atf_tc_fail("fork(): %s", strerror(errno));
/* NOTREACHED */
case 0:
/* wait for parent to get upset */
(void)sleep(2);
/* drain the tty q */
if (read(m, buf, sizeof(buf)) == -1)
err(1, "read");
(void)printf("child2: exiting\n");
exit(0);
/* NOTREACHED */
default:
(void)printf("parent: spawned child2\n");
break;
}
/* set up a restarting signal handler */
(void)sigemptyset(&sa.sa_mask);
sa.sa_handler = sigchld;
sa.sa_flags = SA_RESTART;
REQUIRE_ERRNO(sigaction(SIGCHLD, &sa, NULL), -1);
/* put something in the output q */
REQUIRE_ERRNO(write(s, "Hello world\n", 12), -1);
/* ask for output to drain but don't drain it */
rc = 0;
if (tcsetattr(s, TCSADRAIN, &term) == -1) {
(void)printf("parent: tcsetattr: %s\n", strerror(errno));
rc = 1;
}
/* wait for last child */
sa.sa_handler = SIG_DFL;
REQUIRE_ERRNO(sigaction(SIGCHLD, &sa, NULL), -1);
(void) wait(NULL);
ATF_REQUIRE_EQ(rc, 0);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, ioctl);
return atf_no_error();
}