sysdeps/unix/sysv/linux/tst-fallocate64.c

   1 /* Basic fallocate64 test (no specific flags is checked).
   2    Copyright (C) 2016-2024 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-fallocate-common.c"
  21
  22 static int
  23 do_test (void)
  24 {
  25   ssize_t ret;
  26
  27   ret = do_test_with_offset (0);
  28   if (ret == 1)
  29     return 1;
  30
  31   off_t base_offset = UINT32_MAX + 2048LL;
  32   ret = do_test_with_offset (base_offset);
  33   if (ret == 1)
  34     return 1;
  35
  36   struct stat st;
  37   if (fstat (temp_fd, &st) == -1)
  38     FAIL_EXIT1 ("fstat on temporary file failed: %m");
  39
  40   /* The file size should >= base_offset plus bytes written.  */
  41   off_t expected_value = base_offset + ret;
  42   if (st.st_size < expected_value)
  43     FAIL_EXIT1 ("file size less than expected (%jd > %jd)",
  44                 (intmax_t) expected_value, (intmax_t) st.st_size);
  45
  46   return 0;
  47 }