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/* Tests for pread64 and pwrite64.
Copyright (C) 2000-2020 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/>. */
#define _FILE_OFFSET_BITS 64
#include "tst-preadwrite-common.c"
static int
do_test (void)
{
ssize_t ret;
ret = do_test_with_offset (0);
if (ret == -1)
return 1;
/* Create a sparse file larger than 4GB to check if offset is handled
correctly in p{write,read}64. */
off_t base_offset = UINT32_MAX + 2048LL;
ret = do_test_with_offset (base_offset);
if (ret == -1)
return 1;
struct stat st;
if (fstat (fd, &st) == -1)
{
printf ("error: fstat on temporary file failed: %m");
return 1;
}
/* The file size should >= base_offset plus bytes read. */
off_t expected_value = base_offset + ret;
if (st.st_size < expected_value)
{
printf ("error: file size less than expected (%jd > %jd)\n",
(intmax_t) expected_value, (intmax_t) st.st_size);
return 1;
}
return 0;
}
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