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t_ttyio.c revision 1.2 
      1 /*	$NetBSD: t_ttyio.c,v 1.2 2011/04/19 20:07:53 martin 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 1.2 2011/04/19 20:07:53 martin 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);
     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
     73 sigchld(int nsig)
     74 {
     75 	REQUIRE_ERRNO(wait(NULL), -1);
     76 }
     77 
     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 	ATF_REQUIRE_EQ(rc, 0);
    156 }
    157 
    158 ATF_TP_ADD_TCS(tp)
    159 {
    160 	ATF_TP_ADD_TC(tp, ioctl);
    161 
    162 	return atf_no_error();
    163 }
    164