From:	"A. Sinan Unur" <asu1 AT cornell DOT edu>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: fread/fwite return value
Date:	Wed, 16 Jul 1997 13:13:34 -0400
Organization:	Cornell University
Lines:	37
Sender:	asu1 AT cornell DOT edu (Verified)
Message-ID:	<33CD013E.152B@cornell.edu>
References:	<199707161302 DOT PAA20053 AT free DOT polbox DOT pl>
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

heretic AT polbox DOT com wrote:
> So, I wanted to have error checking and I wrote something like
> 
>  if ( fread(blah,blah,blah) == -1 )
>  {
>     oh_no_error ();
>  }
> 

i think it is an error in the docs. AFAIK, fread is supposed to return
0, not EOF, precisely because the return value is size_t, and 0
signifies no bytes read. see the following routine:

C:\djgpp\c>fr fr.c

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
  FILE* f;
  char c;

  f = fopen(argv[1], "rt");
  if (NULL == f)
  {
    perror(argv[1]);
    exit(EXIT_FAILURE);
  }

  while( fread(&c, 1, 1, f) )
    printf("%c", c);

  fclose(f);

  return EXIT_SUCCESS;
}

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