linux-kernel - Re: Ctrl+C doesn't interrupt process waiting for I/O

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Message-ID: <4869EFF2.7030807@davidnewall.com>
Date:	Tue, 01 Jul 2008 18:20:58 +0930
From:	David Newall <davidn@...idnewall.com>
To:	Elias Oltmanns <eo@...ensachen.de>
CC:	Török Edwin <edwintorok@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Joe Peterson <joe@...rush.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Ctrl+C doesn't interrupt process waiting for I/O

Elias Oltmanns wrote:
> -			if (!L_NOFLSH(tty)) {
> -				n_tty_flush_buffer(tty);
> -				tty_driver_flush_buffer(tty);
> -			}
>  			if (L_ECHO(tty))
>  				echo_char(c, tty);
> -			if (tty->pgrp)
> -				kill_pgrp(tty->pgrp, signal, 1);
> +			isig(signal, tty, 0);

My first reaction is that tty->pgrp must be null.  Perhaps the patch
could be simplified...

 			if (tty->pgrp)
 				kill_pgrp(tty->pgrp, signal, 1);
+			else
+				isig(signal, tty, 0);


Thoughts?
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