t_fifo.c revision 314817 
1/* $NetBSD: t_fifo.c,v 1.4 2017/01/13 21:30:41 christos Exp $ */
2
3/*-
4 * Copyright (c) 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_fifo.c,v 1.4 2017/01/13 21:30:41 christos Exp $");
36
37#include <sys/event.h>
38#include <sys/stat.h>
39
40#include <fcntl.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <unistd.h>
45#include <inttypes.h>
46
47#include <atf-c.h>
48
49#include "h_macros.h"
50
51#define FIFONAME "fifo"
52
53ATF_TC(fifo);
54ATF_TC_HEAD(fifo, tc)
55{
56	atf_tc_set_md_var(tc, "descr", "Checks EVFILT_READ on fifo");
57}
58ATF_TC_BODY(fifo, tc)
59{
60	int kq, n, fd;
61	struct kevent event[1];
62	char buffer[128];
63
64	RL(mkfifo(FIFONAME, 0644));
65	RL(fd = open(FIFONAME, O_RDWR, 0644));
66
67	RL(kq = kqueue());
68
69	EV_SET(&event[0], fd, EVFILT_READ, EV_ADD|EV_ENABLE, 0, 0, 0);
70	RL(kevent(kq, event, 1, NULL, 0, NULL));
71
72	/* make sure there is something in the fifo */
73	RL(write(fd, "foo", 3));
74	(void)printf("fifo: wrote 'foo'\n");
75
76	(void)memset(event, 0, sizeof(event));
77
78	RL(n = kevent(kq, NULL, 0, event, 1, NULL));
79
80	(void)printf("kevent num %d filt %d flags: %#x, fflags: %#x, "
81#ifdef __FreeBSD__
82	    "data: %" PRIdPTR "\n", n, event[0].filter, event[0].flags,
83#else
84	    "data: %" PRId64 "\n", n, event[0].filter, event[0].flags,
85#endif
86	    event[0].fflags, event[0].data);
87
88	ATF_REQUIRE_EQ(event[0].filter, EVFILT_READ);
89
90	RL(n = read(fd, buffer, event[0].data));
91	buffer[n] = '\0';
92	(void)printf("fifo: read '%s'\n", buffer);
93
94	RL(close(fd));
95}
96
97ATF_TP_ADD_TCS(tp)
98{
99	ATF_TP_ADD_TC(tp, fifo);
100
101	return atf_no_error();
102}
103