1 /* 2 * Copyright (c) 2015 Dmitry V. Levin <ldv (at) 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 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 96 main(void) 97 { 98 return 77; 99 } 100 101 #endif 102
