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Member "CSSC-1.4.1/gl/tests/test-fwrite.c" (7 Feb 2016, 2600 Bytes) of package /linux/privat/CSSC-1.4.1.tar.gz:


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    1 /* Test of fwrite() function.
    2    Copyright (C) 2011-2016 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 (fwrite, size_t, (const void *, size_t, size_t, 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 main (int argc, char **argv)
   34 {
   35   const char *filename = "test-fwrite.txt";
   36 
   37   /* We don't have an fwrite() 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   /* Test that fwrite() on an unbuffered stream sets errno if someone else
   45      closes the stream fd behind the back of stdio.  */
   46   {
   47     FILE *fp = fopen (filename, "w");
   48     char buf[5] = "world";
   49     ASSERT (fp != NULL);
   50     setvbuf (fp, NULL, _IONBF, 0);
   51     ASSERT (close (fileno (fp)) == 0);
   52     errno = 0;
   53     ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
   54     ASSERT (errno == EBADF);
   55     ASSERT (ferror (fp));
   56     fclose (fp);
   57   }
   58 
   59   /* Test that fwrite() on an unbuffered stream sets errno if the stream
   60      was constructed with an invalid file descriptor.  */
   61   {
   62     FILE *fp = fdopen (-1, "w");
   63     if (fp != NULL)
   64       {
   65         char buf[5] = "world";
   66         setvbuf (fp, NULL, _IONBF, 0);
   67         errno = 0;
   68         ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
   69         ASSERT (errno == EBADF);
   70         ASSERT (ferror (fp));
   71         fclose (fp);
   72       }
   73   }
   74   {
   75     FILE *fp;
   76     close (99);
   77     fp = fdopen (99, "w");
   78     if (fp != NULL)
   79       {
   80         char buf[5] = "world";
   81         setvbuf (fp, NULL, _IONBF, 0);
   82         errno = 0;
   83         ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
   84         ASSERT (errno == EBADF);
   85         ASSERT (ferror (fp));
   86         fclose (fp);
   87       }
   88   }
   89 
   90   /* Clean up.  */
   91   unlink (filename);
   92 
   93   return 0;
   94 }