From:	"Damian Yerrick" <web DOT poison AT pineight DOT 8m DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: open console into binary mode ?
Date:	Sun, 26 Sep 1999 14:49:05 -0500
Organization:	Rose-Hulman Institute of Technology
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Bonifati <abonifati AT telsa DOT it> wrote in message
news:7slfup$m1f$1 AT fe2 DOT cs DOT interbusiness DOT it...
> i have to write some filter programs which must work for binary files, not
> only for text ones.
>
> i tried to open console into binary mode, but my program
> crashes when the input isn't redirect from a file.

DOS's console is always in text mode. How would a
console (a text input device) be in binary mode?

> here an example:
>
> test.c
> -------
> #include <stdio.h>
> #include <fcntl.h>
> main()

ANSI says it should be
int main(void)

> {
>     char s[100];
>
>     fflush(stdin);
>     setmode(fileno(stdin), O_BINARY);
>
>     gets(s);
>     puts(s);

ANSI says you are missing
return 0;
All functions that don't return void should return something
meaningful. This is especially true for main(), as its return
value is passed back to the operating system as a batch
file's ErrorLevel value.

> }
>
> C:\> test < infile
> ok! it displays it's first line
>
> C:\> test
> the program hangs!
> nothing appears if i press some keys and CTRL-Break doesn't work!

Check to see if stdin is a console first. IIRC, a console can
never be opened in binary mode.


Damian Yerrick
http://pineight.webjump.com/

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