xref: /minix3/tests/kernel/kqueue/write/t_fifo.c (revision 11be35a165022172ed3cea20f2b5df0307540b0e)
1*11be35a1SLionel Sambuc /* $NetBSD: t_fifo.c,v 1.3 2010/11/07 17:51:20 jmmv Exp $ */
2*11be35a1SLionel Sambuc 
3*11be35a1SLionel Sambuc /*-
4*11be35a1SLionel Sambuc  * Copyright (c) 2002, 2008 The NetBSD Foundation, Inc.
5*11be35a1SLionel Sambuc  * All rights reserved.
6*11be35a1SLionel Sambuc  *
7*11be35a1SLionel Sambuc  * This code is derived from software contributed to The NetBSD Foundation
8*11be35a1SLionel Sambuc  * by Luke Mewburn and Jaromir Dolecek.
9*11be35a1SLionel Sambuc  *
10*11be35a1SLionel Sambuc  * Redistribution and use in source and binary forms, with or without
11*11be35a1SLionel Sambuc  * modification, are permitted provided that the following conditions
12*11be35a1SLionel Sambuc  * are met:
13*11be35a1SLionel Sambuc  * 1. Redistributions of source code must retain the above copyright
14*11be35a1SLionel Sambuc  *    notice, this list of conditions and the following disclaimer.
15*11be35a1SLionel Sambuc  * 2. Redistributions in binary form must reproduce the above copyright
16*11be35a1SLionel Sambuc  *    notice, this list of conditions and the following disclaimer in the
17*11be35a1SLionel Sambuc  *    documentation and/or other materials provided with the distribution.
18*11be35a1SLionel Sambuc  *
19*11be35a1SLionel Sambuc  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20*11be35a1SLionel Sambuc  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21*11be35a1SLionel Sambuc  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22*11be35a1SLionel Sambuc  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23*11be35a1SLionel Sambuc  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24*11be35a1SLionel Sambuc  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25*11be35a1SLionel Sambuc  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26*11be35a1SLionel Sambuc  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27*11be35a1SLionel Sambuc  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28*11be35a1SLionel Sambuc  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29*11be35a1SLionel Sambuc  * POSSIBILITY OF SUCH DAMAGE.
30*11be35a1SLionel Sambuc  */
31*11be35a1SLionel Sambuc 
32*11be35a1SLionel Sambuc #include <sys/cdefs.h>
33*11be35a1SLionel Sambuc __COPYRIGHT("@(#) Copyright (c) 2008\
34*11be35a1SLionel Sambuc  The NetBSD Foundation, inc. All rights reserved.");
35*11be35a1SLionel Sambuc __RCSID("$NetBSD: t_fifo.c,v 1.3 2010/11/07 17:51:20 jmmv Exp $");
36*11be35a1SLionel Sambuc 
37*11be35a1SLionel Sambuc #include <sys/event.h>
38*11be35a1SLionel Sambuc #include <sys/stat.h>
39*11be35a1SLionel Sambuc #include <sys/wait.h>
40*11be35a1SLionel Sambuc 
41*11be35a1SLionel Sambuc #include <fcntl.h>
42*11be35a1SLionel Sambuc #include <stdio.h>
43*11be35a1SLionel Sambuc #include <stdlib.h>
44*11be35a1SLionel Sambuc #include <string.h>
45*11be35a1SLionel Sambuc #include <unistd.h>
46*11be35a1SLionel Sambuc 
47*11be35a1SLionel Sambuc #include <atf-c.h>
48*11be35a1SLionel Sambuc 
49*11be35a1SLionel Sambuc #include "../../../h_macros.h"
50*11be35a1SLionel Sambuc 
51*11be35a1SLionel Sambuc #define FIFONAME "fifo"
52*11be35a1SLionel Sambuc 
53*11be35a1SLionel Sambuc ATF_TC(fifo);
ATF_TC_HEAD(fifo,tc)54*11be35a1SLionel Sambuc ATF_TC_HEAD(fifo, tc)
55*11be35a1SLionel Sambuc {
56*11be35a1SLionel Sambuc 	atf_tc_set_md_var(tc, "descr", "Checks EVFILT_WRITE for fifo");
57*11be35a1SLionel Sambuc }
ATF_TC_BODY(fifo,tc)58*11be35a1SLionel Sambuc ATF_TC_BODY(fifo, tc)
59*11be35a1SLionel Sambuc {
60*11be35a1SLionel Sambuc 	char buffer[128];
61*11be35a1SLionel Sambuc 	struct kevent event[1];
62*11be35a1SLionel Sambuc 	pid_t child;
63*11be35a1SLionel Sambuc 	int kq, n, fd, status;
64*11be35a1SLionel Sambuc 
65*11be35a1SLionel Sambuc 	RL(mkfifo(FIFONAME, 0644));
66*11be35a1SLionel Sambuc 	RL(fd = open(FIFONAME, O_RDWR, 0644));
67*11be35a1SLionel Sambuc 	RL(kq = kqueue());
68*11be35a1SLionel Sambuc 
69*11be35a1SLionel Sambuc 	/* spawn child reader */
70*11be35a1SLionel Sambuc 	RL(child = fork());
71*11be35a1SLionel Sambuc 	if (child == 0) {
72*11be35a1SLionel Sambuc 		int sz = read(fd, buffer, 128);
73*11be35a1SLionel Sambuc 		if (sz > 0)
74*11be35a1SLionel Sambuc 			(void)printf("fifo: child read '%.*s'\n", sz, buffer);
75*11be35a1SLionel Sambuc 		_exit(sz <= 0);
76*11be35a1SLionel Sambuc 	}
77*11be35a1SLionel Sambuc 
78*11be35a1SLionel Sambuc 	EV_SET(&event[0], fd, EVFILT_WRITE, EV_ADD|EV_ENABLE, 0, 0, 0);
79*11be35a1SLionel Sambuc 	RL(kevent(kq, event, 1, NULL, 0, NULL));
80*11be35a1SLionel Sambuc 
81*11be35a1SLionel Sambuc 	(void)memset(event, 0, sizeof(event));
82*11be35a1SLionel Sambuc 	RL(n = kevent(kq, NULL, 0, event, 1, NULL));
83*11be35a1SLionel Sambuc 
84*11be35a1SLionel Sambuc 	(void)printf("kevent num %d filt %d flags: %#x, fflags: %#x, "
85*11be35a1SLionel Sambuc 	    "data: %" PRId64 "\n", n, event[0].filter, event[0].flags,
86*11be35a1SLionel Sambuc 	    event[0].fflags, event[0].data);
87*11be35a1SLionel Sambuc 
88*11be35a1SLionel Sambuc 	ATF_REQUIRE_EQ(event[0].filter, EVFILT_WRITE);
89*11be35a1SLionel Sambuc 
90*11be35a1SLionel Sambuc 	RL(write(fd, "foo", 3));
91*11be35a1SLionel Sambuc 	(void)printf("fifo: wrote 'foo'\n");
92*11be35a1SLionel Sambuc 	RL(close(fd));
93*11be35a1SLionel Sambuc 
94*11be35a1SLionel Sambuc 	(void)waitpid(child, &status, 0);
95*11be35a1SLionel Sambuc }
96*11be35a1SLionel Sambuc 
ATF_TP_ADD_TCS(tp)97*11be35a1SLionel Sambuc ATF_TP_ADD_TCS(tp)
98*11be35a1SLionel Sambuc {
99*11be35a1SLionel Sambuc 	ATF_TP_ADD_TC(tp, fifo);
100*11be35a1SLionel Sambuc 
101*11be35a1SLionel Sambuc 	return atf_no_error();
102*11be35a1SLionel Sambuc }
103