tests/test-unistd.c

   1 /* Test of <unistd.h> substitute.
   2    Copyright (C) 2007, 2009-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
  18
  19 #include <config.h>
  20
  21 #include <unistd.h>
  22
  23 /* Check that NULL can be passed through varargs as a pointer type,
  24    per POSIX 2008.  */
  25 static_assert (sizeof NULL == sizeof (void *));
  26
  27 /* Check that the various SEEK_* macros are defined.  */
  28 int sk[] = { SEEK_CUR, SEEK_END, SEEK_SET };
  29
  30 /* Check that the various *_FILENO macros are defined.  */
  31 #if ! (defined STDIN_FILENO                                     \
  32        && (STDIN_FILENO + STDOUT_FILENO + STDERR_FILENO == 3))
  33 missing or broken *_FILENO macros
  34 #endif
  35
  36 /* Check that the types are all defined.  */
  37 size_t t1;
  38 ssize_t t2;
  39 #ifdef TODO /* Not implemented in gnulib yet */
  40 uid_t t3;
  41 gid_t t4;
  42 #endif
  43 off_t t5;
  44 pid_t t6;
  45 #ifdef TODO
  46 useconds_t t7;
  47 intptr_t t8;
  48 #endif
  49 off64_t t9;
  50
  51 int
  52 main (void)
  53 {
  54   return 0;
  55 }