The Unix Heritage Society mailing list
 help / color / mirror / Atom feed
From: Larry McVoy <lm@mcvoy.com>
To: Paul Riley <paul@rileyriot.com>
Cc: tuhs <tuhs@minnie.tuhs.org>
Subject: Re: [TUHS] V6 Console IO
Date: Fri, 24 Jul 2020 07:01:38 -0700	[thread overview]
Message-ID: <20200724140138.GD11199@mcvoy.com> (raw)
In-Reply-To: <CAD05_j2Y=0AJWdwZbQONbt-bxjbhdQqmmuoFeorCVzyC3XnD-g@mail.gmail.com>

Yeah, write is unbuffered though I think Noel is correct, it's going to
a tty and the tty will buffer until \n

So you probably have to set the tty in raw mode (sorry that I'm vague,
I never ran V6).

On Fri, Jul 24, 2020 at 12:54:40PM +0800, Paul Riley wrote:
> Sorry, I see you used "write".
> 
> *Paul Riley*
> 
> 
> 
> On Fri, 24 Jul 2020 at 12:41, Paul Riley <paul@rileyriot.com> wrote:
> 
> > Larry,
> >
> > Thanks for that. The documentation for putchar says that it only puts the
> > low byte of the argument, so I assume that passing an int is ok.
> >
> > Paul
> >
> > *Paul Riley*
> >
> >
> > On Fri, 24 Jul 2020 at 10:57, Larry McVoy <lm@mcvoy.com> wrote:
> >
> >> > int main() {
> >> > int c;
> >> > while ((c = getchar()) != EOF) {
> >> > putchar(c);
> >> > }
> >> > }
> >>
> >> int
> >> main()
> >> {
> >>         int     c;
> >>         char    C;
> >>
> >>         while ((c = getchar()) != EOF) {
> >>                 C = c;
> >>                 write(1, &C, 1);
> >>         }
> >> }
> >>
> >

-- 
---
Larry McVoy            	     lm at mcvoy.com             http://www.mcvoy.com/lm 

  reply	other threads:[~2020-07-24 14:03 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-24  0:18 Paul Riley
2020-07-24  2:57 ` Larry McVoy
2020-07-24  4:41   ` Paul Riley
2020-07-24  4:54     ` Paul Riley
2020-07-24 14:01       ` Larry McVoy [this message]
2020-07-24  2:28 Noel Chiappa
2020-07-24  4:54 ` Paul Riley
2020-07-24 16:37   ` Random832
2020-07-24 17:15     ` Clem Cole
2020-07-25  2:45       ` Random832
2020-07-24 14:34 ` Clem Cole
2020-07-25  2:48   ` Paul Riley
2020-07-25  4:02     ` John Cowan
2020-07-25 15:09       ` Clem Cole
2020-07-25 15:31         ` Richard Salz
2020-07-26  1:08           ` Random832
2020-07-27  9:11             ` Paul Riley
2020-07-24 14:33 Noel Chiappa
2020-07-24 14:36 ` Clem Cole
2020-07-25  1:53   ` Dave Horsfall
2020-07-25 17:45 Noel Chiappa

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200724140138.GD11199@mcvoy.com \
    --to=lm@mcvoy.com \
    --cc=paul@rileyriot.com \
    --cc=tuhs@minnie.tuhs.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).