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/* Basic sync_file_range (not specific flag is checked).
Copyright (C) 2016-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* sync_file_range is only define for LFS. */
#define _FILE_OFFSET_BITS 64
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdint.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <support/temp_file.h>
#include <support/check.h>
#define XSTR(s) STR(S)
#define STR(s) #s
static char *temp_filename;
static int temp_fd;
static char fifoname[] = "/tmp/tst-posix_fadvise-fifo-XXXXXX";
static int fifofd;
void
do_prepare (int argc, char **argv)
{
temp_fd = create_temp_file ("tst-file_sync_range.", &temp_filename);
if (temp_fd == -1)
FAIL_EXIT1 ("cannot create temporary file: %m");
if (mktemp (fifoname) == NULL)
FAIL_EXIT1 ("cannot generate temp file name: %m");
add_temp_file (fifoname);
if (mkfifo (fifoname, S_IWUSR | S_IRUSR) != 0)
FAIL_EXIT1 ("cannot create fifo: %m");
fifofd = open (fifoname, O_RDONLY | O_NONBLOCK);
if (fifofd == -1)
FAIL_EXIT1 ("cannot open fifo: %m");
}
#define PREPARE do_prepare
static int
do_test (void)
{
int ret;
/* This tests first check for some invalid usage and then check for
a simple usage. It does not cover for all possible issue since for
EIO/ENOMEM/ENOSPC would require to create very specific scenarios that
are outside the current test coverage (basically correct kernel argument
passing. */
/* Check for invalid file descriptor. */
if ((ret = sync_file_range (-1, 0, 0, 0)) != -1)
FAIL_EXIT1 ("sync_file_range did not fail on an invalid descriptor "
"(returned %d, expected -1)", ret);
if (errno != EBADF)
FAIL_EXIT1 ("sync_file_range on an invalid descriptor did not set errno to "
"EBADF (%d)", errno);
if ((ret = sync_file_range (fifofd, 0, 0, 0)) != -1)
FAIL_EXIT1 ("sync_file_range did not fail on an invalid descriptor "
"(returned %d, expected -1)", ret);
if (errno != ESPIPE)
FAIL_EXIT1 ("sync_file_range on an invalid descriptor did not set errno to "
"EBADF (%d)", errno);
/* Check for invalid flags (it must be
SYNC_FILE_RANGE_{WAIT_BEFORE,WRITE,WAIT_AFTER) or a 'or' combination of
them. */
if ((ret = sync_file_range (temp_fd, 0, 0, -1)) != -1)
FAIL_EXIT1 ("sync_file_range did not failed with invalid flags "
"(returned %d, " "expected -1)", ret);
if (errno != EINVAL)
FAIL_EXIT1 ("sync_file_range with invalid flag did not set errno to "
"EINVAL (%d)", errno);
/* Check for negative offset. */
if ((ret = sync_file_range (temp_fd, -1, 1, 0)) != -1)
FAIL_EXIT1 ("sync_file_range did not failed with invalid offset "
"(returned %d, expected -1)", ret);
if (errno != EINVAL)
FAIL_EXIT1 ("sync_file_range with invalid offset did not set errno to "
"EINVAL (%d)", errno);
/* offset + nbytes must be a positive value. */
if ((ret = sync_file_range (temp_fd, 1024, -2048, 0)) != -1)
FAIL_EXIT1 ("sync_file_range did not failed with invalid nbytes (returned %d, "
"expected -1)", ret);
if (errno != EINVAL)
FAIL_EXIT1 ("sync_file_range with invalid offset did not set errno to "
"EINVAL (%d)", errno);
/* offset + nbytes must be larger or equal than offset */
if ((ret = sync_file_range (temp_fd, -1024, 1024, 0)) != -1)
FAIL_EXIT1 ("sync_file_range did not failed with invalid offset "
"(returned %d, expected -1)", ret);
if (errno != EINVAL)
FAIL_EXIT1 ("sync_file_range with invalid offset did not set errno to "
"EINVAL (%d)", errno);
/* Check simple successful case. */
if ((ret = sync_file_range (temp_fd, 0, 1024, 0)) == -1)
FAIL_EXIT1 ("sync_file_range failed (errno = %d)", errno);
/* Finally check also a successful case with a 64-bit offset. */
off_t large_offset = UINT32_MAX + 2048LL;
if ((ret = sync_file_range (temp_fd, large_offset, 1024, 0)) == -1)
FAIL_EXIT1 ("sync_file_range failed (errno = %d)", errno);
return 0;
}
#include <support/test-driver.c>
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