tests/test-vdprintf.c

   1 /* Test of vdprintf() function.
   2    Copyright (C) 2011-2021 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 #include <config.h>
  18
  19 #include <stdio.h>
  20
  21 #include "signature.h"
  22 SIGNATURE_CHECK (vdprintf, int, (int, const char *, va_list));
  23
  24 #include <errno.h>
  25 #include <unistd.h>
  26
  27 #include "macros.h"
  28
  29 static int
  30 my_dprintf (int fd, const char *format, ...)
  31 {
  32   va_list args;
  33   int ret;
  34
  35   va_start (args, format);
  36   ret = vdprintf (fd, format, args);
  37   va_end (args);
  38   return ret;
  39 }
  40
  41 int
  42 main (int argc, char *argv[])
  43 {
  44   /* Test behaviour for invalid file descriptors.  */
  45   {
  46     errno = 0;
  47     ASSERT (my_dprintf (-1, "test") == -1);
  48     ASSERT (errno == EBADF);
  49   }
  50   {
  51     close (99);
  52     errno = 0;
  53     ASSERT (my_dprintf (99, "test") == -1);
  54     ASSERT (errno == EBADF);
  55   }
  56
  57   return 0;
  58 }