From: djberg96@... (Daniel Berger)
Date: 2004-11-28T22:57:51+09:00
Subject: File.chardev? for Win32

Hi all,

According to the MSDN docs, the _isatty() function will return true
for any character device (terminal, console, printer, or serial port).
Thus, this works as expected:

File.new("NUL").isatty # true

But this doesn't:

File.chardev?("NUL") # false

I've provided some sample C code below.  I can add this into
win32-file, but I'd like to see it corrected in core Ruby.

Also, does anyone know how to detect a block device on Win32?

Regards,

Dan

/* chardev test */
#include <stdio.h>
#include <io.h>

int main(){
   FILE *fd;

   // Also works with "aux", etc
   if( (fd = fopen("NUL","r")) == NULL){
      printf("Failed!\n");
      return -1;
   }

   if(_isatty(_fileno(fd))){
      printf("Char device!\n"); // True
   }

   fclose(fd);

   printf("done\n");
   return 0;
}