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From: seaton@DEC-BLOTT.UUCP (Ian Seaton, Dedicated Mail, REO2-F/D3,  DTN 830 3)
Newsgroups: mod.computers.vax
Subject: Re: VMS Output
Message-ID: <8603121138.AA08548@decwrl.DEC.COM>
Date: Wed, 12-Mar-86 06:38:21 EST
Article-I.D.: decwrl.8603121138.AA08548
Posted: Wed Mar 12 06:38:21 1986
Date-Received: Sat, 15-Mar-86 04:19:40 EST
Sender: usenet@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
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Approved: info-vax@sri-kl.arpa

> "rick@siemans" writes that VMS is giving him newlines   <
> every 256 characters when writing from a VAX C program :<

The most likely solution to your problem is that unlike UNIX, VMS has
`half-a-million' different ways to open an output stream and you've
got the wrong one. (Hardly surprising :-))

The one you probably want is to open your output stream like:

	fd = open( "tt:", O_RDWR, "ctx=bin" );

which tells RMS that you want to read and write binary not text.

eg

#include stdio
#include file
main()
{
int fd, i;

	fd = open( "tt:", O_WRONLY, "ctx=bin" );
	for( i = 0; i < 512; i++ )
	    write( fd, "A", 1 );
	close( fd );
}

Should write out 512 `A's without break.

     Share and Enjoy...

          Ian Seaton
                    DEC Reading, England

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