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
39 struct linux_inotify_event events[2];
40
41 void
_start(void)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