strace/tests/file_handle.c

87 lines
3.2 KiB
C

/*
* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "tests.h"
#include <fcntl.h>
#ifdef MAX_HANDLE_SZ
# include <alloca.h>
# include <assert.h>
# include <errno.h>
# include <stdio.h>
int
main(void)
{
struct file_handle *handle =
alloca(sizeof(struct file_handle) + MAX_HANDLE_SZ);
const int dirfd = AT_FDCWD;
const int flags = AT_SYMLINK_FOLLOW;
int mount_id;
unsigned int i;
handle->handle_bytes = 0;
assert(name_to_handle_at(dirfd, ".", handle, &mount_id, flags | 1) == -1);
if (EINVAL != errno)
perror_msg_and_skip("name_to_handle_at");
printf("name_to_handle_at(AT_FDCWD, \".\", {handle_bytes=0}, %p"
", AT_SYMLINK_FOLLOW|0x1) = -1 EINVAL (%m)\n", &mount_id);
assert(name_to_handle_at(dirfd, ".", handle, &mount_id, flags) == -1);
if (EOVERFLOW != errno)
perror_msg_and_skip("name_to_handle_at");
printf("name_to_handle_at(AT_FDCWD, \".\", {handle_bytes=0 => %u}"
", %p, AT_SYMLINK_FOLLOW) = -1 EOVERFLOW (%m)\n",
handle->handle_bytes, &mount_id);
assert(name_to_handle_at(dirfd, ".", handle, &mount_id, flags) == 0);
printf("name_to_handle_at(AT_FDCWD, \".\", {handle_bytes=%u"
", handle_type=%d, f_handle=0x",
handle->handle_bytes, handle->handle_type);
for (i = 0; i < handle->handle_bytes; ++i)
printf("%02x", handle->f_handle[i]);
printf("}, [%d], AT_SYMLINK_FOLLOW) = 0\n", mount_id);
printf("open_by_handle_at(-1, {handle_bytes=%u, handle_type=%d"
", f_handle=0x", handle->handle_bytes, handle->handle_type);
for (i = 0; i < handle->handle_bytes; ++i)
printf("%02x", handle->f_handle[i]);
int rc = open_by_handle_at(-1, handle, O_RDONLY | O_DIRECTORY);
printf("}, O_RDONLY|O_DIRECTORY) = %d %s (%m)\n", rc, errno2name());
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("MAX_HANDLE_SZ")
#endif