Home | History | Annotate | Line # | Download | only in ttyio
t_ttyio.c revision 1.1 
      1 /*	$NetBSD: t_ttyio.c,v 1.1 2011/01/07 02:47:41 pgoyette 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 1.1 2011/01/07 02:47:41 pgoyette 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 	/* get terminal settings for later use */
     89 	REQUIRE_ERRNO(tcgetattr(STDIN_FILENO, &term), -1);
     90 
     91 	/* get a tty */
     92 	REQUIRE_ERRNO(openpty(&m, &s, name, &term, NULL), -1);
     93 
     94 	switch (fork()) {
     95 	case -1:
     96 		atf_tc_fail("fork(): %s", strerror(errno));
     97 		/* NOTREACHED */
     98 	case 0:
     99 		/* wait for parent to get set up */
    100 		(void)sleep(1);
    101 		(void)printf("child1: exiting\n");
    102 		exit(0);
    103 		/* NOTREACHED */
    104 	default:
    105 		(void)printf("parent: spawned child1\n");
    106 		break;
    107 	}
    108 
    109 	switch (fork()) {
    110 	case -1:
    111 		atf_tc_fail("fork(): %s", strerror(errno));
    112 		/* NOTREACHED */
    113 	case 0:
    114 		/* wait for parent to get upset */
    115 		(void)sleep(2);
    116 		/* drain the tty q */
    117 		if (read(m, buf, sizeof(buf)) == -1)
    118 			err(1, "read");
    119 		(void)printf("child2: exiting\n");
    120 		exit(0);
    121 		/* NOTREACHED */
    122 	default:
    123 		(void)printf("parent: spawned child2\n");
    124 		break;
    125 	}
    126 
    127 	/* set up a restarting signal handler */
    128 	(void)sigemptyset(&sa.sa_mask);
    129 	sa.sa_handler = sigchld;
    130 	sa.sa_flags = SA_RESTART;
    131 	REQUIRE_ERRNO(sigaction(SIGCHLD, &sa, NULL), -1);
    132 
    133 	/* put something in the output q */
    134 	REQUIRE_ERRNO(write(s, "Hello world\n", 12), -1);
    135 
    136 	/* ask for output to drain but don't drain it */
    137 	rc = 0;
    138 	if (tcsetattr(s, TCSADRAIN, &term) == -1) {
    139 		(void)printf("parent: tcsetattr: %s\n", strerror(errno));
    140 		rc = 1;
    141 	}
    142 
    143 	/* wait for last child */
    144 	sa.sa_handler = SIG_DFL;
    145 	REQUIRE_ERRNO(sigaction(SIGCHLD, &sa, NULL), -1);
    146 	(void) wait(NULL);
    147 
    148 	ATF_REQUIRE_EQ(rc, 0);
    149 }
    150 
    151 ATF_TP_ADD_TCS(tp)
    152 {
    153 	ATF_TP_ADD_TC(tp, ioctl);
    154 
    155 	return atf_no_error();
    156 }
    157