overby.me
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1/*
2 * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_APACHE_LICENSE_HEADER_START@
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *
18 * @APPLE_APACHE_LICENSE_HEADER_END@
19 */
20#include <sys/types.h>
21#include <sys/stat.h>
22#include <sys/event.h>
23#include <sys/time.h>
24#include <sys/param.h>
25#include <stdlib.h>
26#include <stdio.h>
27#include <unistd.h>
28#include <errno.h>
29#include <string.h>
30
31int main(int argc, char *argv[])
32{
33 int kq = kqueue();
34 struct kevent kev;
35 struct stat sb;
36
37 if (argc != 2) {
38 fprintf(stderr, "usage: %s <object on mount point>\n", argv[0]);
39 exit(EXIT_FAILURE);
40 }
41
42 EV_SET(&kev, 0, EVFILT_FS, EV_ADD, 0, 0, 0);
43
44 if (kevent(kq, &kev, 1, NULL, 0, NULL) == -1) {
45 fprintf(stderr, "adding EVFILT_FS to kqueue failed: %s\n", strerror(errno));
46 exit(EXIT_FAILURE);
47 }
48
49 if (stat(argv[1], &sb) == 0) {
50 exit(EXIT_SUCCESS);
51 }
52
53 for (;;) {
54 kevent(kq, NULL, 0, &kev, 1, NULL);
55 if (stat(argv[1], &sb) == 0) {
56 break;
57 }
58 }
59
60 exit(EXIT_SUCCESS);
61}