1 /*
2 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <alloca.h>
33 #include <assert.h>
34 #include <errno.h>
35 #include <fcntl.h>
36 #include <stdio.h>
37
38 #ifdef MAX_HANDLE_SZ
39
40 int
main(void)41 main(void)
42 {
43 struct file_handle *handle =
44 alloca(sizeof(struct file_handle) + MAX_HANDLE_SZ);
45 const int dirfd = AT_FDCWD;
46 const int flags = AT_SYMLINK_FOLLOW;
47 int mount_id;
48 unsigned int i;
49
50 handle->handle_bytes = 0;
51
52 if (name_to_handle_at(dirfd, ".", handle, &mount_id, flags | 1) != -1
53 || EINVAL != errno) {
54 perror("name_to_handle_at");
55 return 77;
56 }
57 printf("name_to_handle_at(AT_FDCWD, \".\", {handle_bytes=0}, %p"
58 ", AT_SYMLINK_FOLLOW|0x1) = -1 EINVAL (Invalid argument)\n",
59 &mount_id);
60
61 if (name_to_handle_at(dirfd, ".", handle, &mount_id, flags) != -1
62 || EOVERFLOW != errno) {
63 perror("name_to_handle_at");
64 return 77;
65 }
66 printf("name_to_handle_at(AT_FDCWD, \".\", {handle_bytes=0 => %u}"
67 ", %p, AT_SYMLINK_FOLLOW) = -1 EOVERFLOW"
68 " (Value too large for defined data type)\n",
69 handle->handle_bytes, &mount_id);
70
71 assert(!name_to_handle_at(dirfd, ".", handle, &mount_id, flags));
72 printf("name_to_handle_at(AT_FDCWD, \".\", {handle_bytes=%u"
73 ", handle_type=%d, f_handle=0x",
74 handle->handle_bytes, handle->handle_type);
75 for (i = 0; i < handle->handle_bytes; ++i)
76 printf("%02x", handle->f_handle[i]);
77 printf("}, [%d], AT_SYMLINK_FOLLOW) = 0\n", mount_id);
78
79 assert(open_by_handle_at(-1, handle, O_RDONLY | O_DIRECTORY));
80 printf("open_by_handle_at(-1, {handle_bytes=%u, handle_type=%d"
81 ", f_handle=0x", handle->handle_bytes, handle->handle_type);
82 for (i = 0; i < handle->handle_bytes; ++i)
83 printf("%02x", handle->f_handle[i]);
84 printf("}, O_RDONLY|O_DIRECTORY) = -1 %s\n",
85 EPERM == errno ? "EPERM (Operation not permitted)" :
86 EINVAL == errno ? "EINVAL (Invalid argument)" :
87 "EBADF (Bad file descriptor)");
88
89 puts("+++ exited with 0 +++");
90 return 0;
91 }
92
93 #else
94
95 int
main(void)96 main(void)
97 {
98 return 77;
99 }
100
101 #endif
102