t_file.c revision 314817 
1/* $NetBSD: t_file.c,v 1.4 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.
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_file.c,v 1.4 2017/01/13 21:30:41 christos Exp $");
36
37#include <sys/param.h>
38#include <sys/event.h>
39#include <sys/mount.h>
40#include <sys/wait.h>
41
42#include <err.h>
43#include <errno.h>
44#include <fcntl.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include <unistd.h>
49#include <inttypes.h>
50
51#include <atf-c.h>
52
53#include "h_macros.h"
54
55#define FILENAME "file"
56#define NLINES 5
57
58static void
59child(void)
60{
61	int i, n, fd;
62
63	(void)sleep(1);
64
65	for (i = 0; i < NLINES; ++i) {
66		fd = open(FILENAME, O_WRONLY|O_APPEND, 0644);
67		if (fd < 0)
68			err(EXIT_FAILURE, "open()");
69
70		n = write(fd, "foo\n", 4);
71		if (n < 0)
72			err(EXIT_FAILURE, "write()");
73
74		(void)close(fd);
75		(void)sleep(1);
76	}
77	_exit(0);
78}
79
80ATF_TC(file);
81ATF_TC_HEAD(file, tc)
82{
83	atf_tc_set_md_var(tc, "descr", "Checks EVFILT_READ on regular file");
84}
85ATF_TC_BODY(file, tc)
86{
87	char buffer[128];
88	struct kevent event[1];
89	pid_t pid;
90	int fd, kq, n, num, status;
91
92	RL(pid = fork());
93	if (pid == 0) {
94		child();
95		/* NOTREACHED */
96	}
97
98	RL(fd = open(FILENAME, O_RDONLY|O_CREAT, 0644));
99
100#if 1		/* XXX: why was this disabled? */
101	RL(lseek(fd, 0, SEEK_END));
102#endif
103
104	RL(kq = kqueue());
105
106	EV_SET(&event[0], fd, EVFILT_READ, EV_ADD|EV_ENABLE, 0, 0, 0);
107	RL(kevent(kq, event, 1, NULL, 0, NULL));
108
109	for (num = 0; num < NLINES;) {
110		RL(n = kevent(kq, NULL, 0, event, 1, NULL));
111		num += n;
112
113		(void)printf("kevent num %d flags: %#x, fflags: %#x, data: "
114#ifdef __FreeBSD__
115		    "%" PRIdPTR "\n", n, event[0].flags, event[0].fflags,
116#else
117		    "%" PRId64 "\n", n, event[0].flags, event[0].fflags,
118#endif
119		    event[0].data);
120
121		if (event[0].data < 0)
122#if 1	/* XXXLUKEM */
123			RL(lseek(fd, 0, SEEK_END));
124#else
125			RL(lseek(fd, event[0].data, SEEK_END));
126#endif
127
128		RL(n = read(fd, buffer, 128));
129		buffer[n] = '\0';
130		(void)printf("file(%d): %s", num, buffer);
131	}
132
133	(void)waitpid(pid, &status, 0);
134
135	(void)printf("read: successful end\n");
136}
137
138ATF_TP_ADD_TCS(tp)
139{
140	ATF_TP_ADD_TC(tp, file);
141
142	return atf_no_error();
143}
144