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h_inotify_watch_change.c revision 1.1 
      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
     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