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      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