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Member "gnuastro-0.9/bootstrapped/tests/test-fwrite.c" (17 Apr 2019, 2649 Bytes) of package /linux/privat/gnuastro-0.9.tar.lz:


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    1 /* Test of fwrite() function.
    2    Copyright (C) 2011-2019 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 <https://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 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
   29 # include "msvc-inval.h"
   30 #endif
   31 
   32 #include "macros.h"
   33 
   34 int
   35 main (int argc, char **argv)
   36 {
   37   const char *filename = "test-fwrite.txt";
   38 
   39   /* We don't have an fwrite() function that installs an invalid parameter
   40      handler so far.  So install that handler here, explicitly.  */
   41 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
   42     && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
   43   gl_msvc_inval_ensure_handler ();
   44 #endif
   45 
   46   /* Test that fwrite() on an unbuffered stream sets errno if someone else
   47      closes the stream fd behind the back of stdio.  */
   48   {
   49     FILE *fp = fopen (filename, "w");
   50     char buf[5] = "world";
   51     ASSERT (fp != NULL);
   52     setvbuf (fp, NULL, _IONBF, 0);
   53     ASSERT (close (fileno (fp)) == 0);
   54     errno = 0;
   55     ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
   56     ASSERT (errno == EBADF);
   57     ASSERT (ferror (fp));
   58     fclose (fp);
   59   }
   60 
   61   /* Test that fwrite() on an unbuffered stream sets errno if the stream
   62      was constructed with an invalid file descriptor.  */
   63   {
   64     FILE *fp = fdopen (-1, "w");
   65     if (fp != NULL)
   66       {
   67         char buf[5] = "world";
   68         setvbuf (fp, NULL, _IONBF, 0);
   69         errno = 0;
   70         ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
   71         ASSERT (errno == EBADF);
   72         ASSERT (ferror (fp));
   73         fclose (fp);
   74       }
   75   }
   76   {
   77     FILE *fp;
   78     close (99);
   79     fp = fdopen (99, "w");
   80     if (fp != NULL)
   81       {
   82         char buf[5] = "world";
   83         setvbuf (fp, NULL, _IONBF, 0);
   84         errno = 0;
   85         ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
   86         ASSERT (errno == EBADF);
   87         ASSERT (ferror (fp));
   88         fclose (fp);
   89       }
   90   }
   91 
   92   /* Clean up.  */
   93   unlink (filename);
   94 
   95   return 0;
   96 }