stdio-common/tst-bz11319.c

   1 /* Regression test for bug 11319.
   2    Copyright (C) 2018-2023 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 _GNU_SOURCE 1
  20
  21 #include <fcntl.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24
  25 #include <support/check.h>
  26 #include <support/temp_file.h>
  27 #include <support/xunistd.h>
  28
  29 static int
  30 do_test (void)
  31 {
  32   char *tempfile;
  33   int fd;
  34
  35   /* Create a temporary file and open it in read-only mode.  */
  36   TEST_VERIFY_EXIT (create_temp_file ("tst-bz11319", &tempfile));
  37   fd = xopen (tempfile, O_RDONLY, 0660);
  38
  39   /* Try and write to the temporary file to intentionally fail, then
  40      check that dprintf (or __dprintf_chk) return EOF.  */
  41   TEST_COMPARE (dprintf (fd, "%d", 0), EOF);
  42
  43   xclose (fd);
  44   free (tempfile);
  45
  46   return 0;
  47 }
  48
  49 #include <support/test-driver.c>