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From: meissner@datagen.UUCP
Newsgroups: net.unix
Subject: Re: 4.2BSB Buffered I/O buffersize
Message-ID: <18@datagen.UUCP>
Date: Wed, 29-Jan-86 11:10:21 EST
Article-I.D.: datagen.18
Posted: Wed Jan 29 11:10:21 1986
Date-Received: Sat, 1-Feb-86 20:32:43 EST
References: <546@well.UUCP>
Reply-To: meissner@datagen.UUCP (Michael Meissner)
Organization: Data General (Languages @ Westborough, MA.)
Lines: 28
Keywords: buffered I/o

In article <546@well.UUCP> jayr@well.UUCP writes:
>I've got a program that is having trouble getting input because of the 
>limitations of the input buffer for buffered i/o (about 256), I'm occasionally
>getting myself into trouble.
>
>1) Is there a way to change the buffersize for reading input?
>2) Is there a non-buffered way to do this?
>
>I want to read up to (and including) a carriage return (equivalent to gets).
>Any ideas?  Thanks in advance.

    #1	If you are using system V.2 (also in forthcoming ANSI std):
		setvbuf( FILE *stream, char *buf, int type, int size );
	where:
		stream is FILE * you want to change the buffering on
		buf    is either the buffer to use or NULL (malloc buffer)
		type   is one of:
				_IONBF	no buffering
				_IOLBF	line buffer (output only I think)
				_IOFBF	full buffer
		size   is the buffer size to use

	If you are using BSD 4.[12]:
		setbuffer( FILE *stream, char *buf, int size );

    #2	Use read instead of stdio.

Michael Meissner, Data General