Path: utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!yale!cmcl2!kramden.acf.nyu.edu!brnstnd
From: brnstnd@kramden.acf.nyu.edu (Dan Bernstein)
Newsgroups: comp.unix.questions
Subject: Re: redirected output is buffered, how do you flush it?
Message-ID: <18404:Feb1023:12:4291@kramden.acf.nyu.edu>
Date: 10 Feb 91 23:12:42 GMT
References: <1991Feb05.000629.7401@convex.com> <1892:Feb521:11:4591@kramden.acf.nyu.edu> <1991Feb10.081651.24841@uwbln.uniware.de>
Organization: IR
Lines: 18

In article <1991Feb10.081651.24841@uwbln.uniware.de> jde@uwbln.uniware.de (Jutta Degener) writes:
> > Here's a very easy general solution: Run % pty script > some_file
> When you hit '^C', both the shell and its subprocess, awk, are killed.
> Unfortunately, as Tom already mentioned, awk doesn't flush its buffers.

Fortunately, a program running under pty sees a terminal for its input
and output, so any program using stdio (including awk) will flush its
buffers just as if you ran it without redirection. That's why it's a
solution.

> trap "" 1 2 3 .. etc will ignore signals for both a shell and its 
> subprocesses. (On the systems I checked.)

That won't solve the poster's problem. He's saying ``output is buffered,
so when I kill awk, I lose output.'' Tom and I are saying ``so don't
buffer your output.'' You're saying ``so don't kill awk.''

---Dan