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 
22 static int
do_test(void)23 do_test (void)
24 {
25   int ret;
26 
27   ret = do_test_with_offset (0);
28 
29   if (!temp_fd_supports_holes)
30     {
31       puts ("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 (base_offset);
39 
40   struct stat st;
41   if (fstat (temp_fd, &st) == -1)
42     {
43       printf ("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 ("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