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       1                 :            : /* Test of fgetc() function.
       2                 :            :    Copyright (C) 2011-2012 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, or (at your option)
       7                 :            :    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 <http://www.gnu.org/licenses/>.  */
      16                 :            : 
      17                 :            : #include <config.h>
      18                 :            : 
      19                 :            : #include <stdio.h>
      20                 :            : 
      21                 :            : #include "signature.h"
      22                 :            : SIGNATURE_CHECK (fgetc, int, (FILE *));
      23                 :            : 
      24                 :            : #include <errno.h>
      25                 :            : #include <fcntl.h>
      26                 :            : #include <unistd.h>
      27                 :            : 
      28                 :            : #include "msvc-inval.h"
      29                 :            : 
      30                 :            : #include "macros.h"
      31                 :            : 
      32                 :            : int
      33                 :          1 : main (int argc, char **argv)
      34                 :            : {
      35                 :          1 :   const char *filename = "test-fgetc.txt";
      36                 :            : 
      37                 :            :   /* We don't have an fgetc() function that installs an invalid parameter
      38                 :            :      handler so far.  So install that handler here, explicitly.  */
      39                 :            : #if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
      40                 :            :     && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
      41                 :            :   gl_msvc_inval_ensure_handler ();
      42                 :            : #endif
      43                 :            : 
      44                 :            :   /* Prepare a file.  */
      45                 :            :   {
      46                 :          1 :     const char text[] = "hello world";
      47                 :          1 :     int fd = open (filename, O_RDWR | O_CREAT | O_TRUNC, 0600);
      48         [ -  + ]:          1 :     ASSERT (fd >= 0);
      49         [ -  + ]:          1 :     ASSERT (write (fd, text, sizeof (text)) == sizeof (text));
      50         [ -  + ]:          1 :     ASSERT (close (fd) == 0);
      51                 :            :   }
      52                 :            : 
      53                 :            :   /* Test that fgetc() sets errno if someone else closes the stream
      54                 :            :      fd behind the back of stdio.  */
      55                 :            :   {
      56                 :          1 :     FILE *fp = fopen (filename, "r");
      57         [ -  + ]:          1 :     ASSERT (fp != NULL);
      58         [ -  + ]:          1 :     ASSERT (close (fileno (fp)) == 0);
      59                 :          1 :     errno = 0;
      60         [ -  + ]:          1 :     ASSERT (fgetc (fp) == EOF);
      61         [ -  + ]:          1 :     ASSERT (errno == EBADF);
      62         [ -  + ]:          1 :     ASSERT (ferror (fp));
      63                 :          1 :     fclose (fp);
      64                 :            :   }
      65                 :            : 
      66                 :            :   /* Test that fgetc() sets errno if the stream was constructed with
      67                 :            :      an invalid file descriptor.  */
      68                 :            :   {
      69                 :          1 :     FILE *fp = fdopen (-1, "r");
      70         [ -  + ]:          1 :     if (fp != NULL)
      71                 :            :       {
      72                 :          0 :         errno = 0;
      73         [ #  # ]:          0 :         ASSERT (fgetc (fp) == EOF);
      74         [ #  # ]:          0 :         ASSERT (errno == EBADF);
      75         [ #  # ]:          0 :         ASSERT (ferror (fp));
      76                 :          0 :         fclose (fp);
      77                 :            :       }
      78                 :            :   }
      79                 :            :   {
      80                 :          1 :     FILE *fp = fdopen (99, "r");
      81         [ -  + ]:          1 :     if (fp != NULL)
      82                 :            :       {
      83                 :          0 :         errno = 0;
      84         [ #  # ]:          0 :         ASSERT (fgetc (fp) == EOF);
      85         [ #  # ]:          0 :         ASSERT (errno == EBADF);
      86         [ #  # ]:          0 :         ASSERT (ferror (fp));
      87                 :          0 :         fclose (fp);
      88                 :            :       }
      89                 :            :   }
      90                 :            : 
      91                 :            :   /* Clean up.  */
      92                 :          1 :   unlink (filename);
      93                 :            : 
      94                 :          1 :   return 0;
      95                 :            : }