1/* Tests for pread64 and pwrite64.
2 Copyright (C) 2016-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#define _FILE_OFFSET_BITS 64
20#include "tst-preadvwritev-common.c"
21
22static int
23do_test (void)
24{
25 int ret;
26
27 ret = do_test_with_offset (offset: 0);
28
29 if (!temp_fd_supports_holes)
30 {
31 puts (s: "warning: partial test due to lack of support for holes");
32 return ret;
33 }
34
35 /* Create a sparse file larger than 4GB to check if offset is handled
36 correctly in p{write,read}v64. */
37 off_t base_offset = UINT32_MAX + 2048LL;
38 ret += do_test_with_offset (offset: base_offset);
39
40 struct stat st;
41 if (fstat (fd: temp_fd, buf: &st) == -1)
42 {
43 printf (format: "error: fstat on temporary file failed: %m");
44 return 1;
45 }
46
47 /* The total size should base_offset plus 2 * 96. */
48 off_t expected_value = base_offset + (2 * (96LL));
49 if (st.st_size != expected_value)
50 {
51 printf (format: "error: file size different than expected (%jd != %jd)\n",
52 (intmax_t) expected_value, (intmax_t) st.st_size);
53 return 1;
54 }
55
56 return ret;
57}
58

source code of glibc/misc/tst-preadvwritev64.c