1/*	$NetBSD: h_inotify_watch_change.c,v 1.1 2023/08/19 22:56:44 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2023 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Theodore Preduta.
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#include <sys/cdefs.h>
32__RCSID("$NetBSD: h_inotify_watch_change.c,v 1.1 2023/08/19 22:56:44 christos Exp $");
33
34#include "h_linux.h"
35
36#include <compat/linux/linux_syscall.h>
37#include <compat/linux/common/linux_inotify.h>
38
39struct linux_inotify_event events[2];
40
41void
42_start(void)
43{
44	int fd, wd, targetfd;
45	ssize_t nread;
46
47	RS(targetfd = open("test", LINUX_O_RDWR|LINUX_O_CREAT, 0644));
48	RS(close(targetfd));
49
50	RS(fd = syscall(LINUX_SYS_inotify_init));
51	RS(wd = syscall(LINUX_SYS_inotify_add_watch, fd, (register_t)"test",
52            LINUX_IN_CLOSE_NOWRITE));
53
54	/* We should only get the close event. */
55	RS(targetfd = open("test", LINUX_O_RDONLY|LINUX_O_CREAT, 0644));
56	RS(close(targetfd));
57
58	RS(nread = read(fd, events, sizeof(events)));
59	REQUIRE(nread == sizeof(events[0]));
60	REQUIRE(events[0].mask == LINUX_IN_CLOSE_NOWRITE);
61
62	/* Change the watch descriptor. */
63	RS(wd = syscall(LINUX_SYS_inotify_add_watch, fd, (register_t)"test",
64	    LINUX_IN_OPEN));
65
66	/* We should only get the open event. */
67	RS(targetfd = open("test", LINUX_O_RDONLY|LINUX_O_CREAT, 0644));
68	RS(close(targetfd));
69
70	RS(nread = read(fd, events, sizeof(events)));
71	REQUIRE(nread == sizeof(events[0]));
72	REQUIRE(events[0].mask == LINUX_IN_OPEN);
73
74	/* Add to the watch descriptor. */
75	RS(wd = syscall(LINUX_SYS_inotify_add_watch, fd, (register_t)"test",
76	    LINUX_IN_CLOSE_NOWRITE|LINUX_IN_MASK_ADD));
77
78	/* Now we should get both the open and the close. */
79	RS(targetfd = open("test", LINUX_O_RDONLY|LINUX_O_CREAT, 0644));
80	RS(close(targetfd));
81
82	RS(nread = read(fd, events, sizeof(events)));
83	REQUIRE(nread == 2 * sizeof(events[0]));
84	REQUIRE(events[0].mask == LINUX_IN_OPEN);
85	REQUIRE(events[1].mask == LINUX_IN_CLOSE_NOWRITE);
86
87	exit(0);
88}
89