On 02 May 2001 10:37:21 -0600
[EMAIL PROTECTED] (Eric W. Biederman) wrote:
> Fabrice Gautier <[EMAIL PROTECTED]> writes:
> > So this this probably a sulogin/mingetty problem. They should set the
> > CREAD flag in your tty c_cflag.
> >
> > the patch for busybox repalced the line
> > tty.c_cflag |= HUPCL|CLOCAL
> > by
> > tty.c_cflag |= CREAD|HUPCL|CLOCAL
> >
> > Hope this help.
>
> This part is correct.
>
> However the kernel sets CREAD by default.
Are your sure? Wasn't this the behaviour for 2.4.2 but changed in 2.4.3
> sysvinit (and possibly other inits) clears CREAD.
In my case I was using busybox as init. So there is no sysinit or any other
init called before this line.
> I wish I knew where the breakage actually occured.
Just look at this diff on serial.c between 2.4.2 and 2.4.3:
--- serial.c Sat Apr 21 17:22:53 2001
+++ ../../../linux-2.4.2/drivers/char/serial.c Sat Feb 17 01:02:36 2001
@@ -1764,8 +1765,8 @@
/*
* !!! ignore all characters if CREAD is not set
*/
-// if ((cflag & CREAD) == 0)
-// info->ignore_status_mask |= UART_LSR_DR;
+ if ((cflag & CREAD) == 0)
+ info->ignore_status_mask |= UART_LSR_DR;
save_flags(flags); cli();
if (uart_config[info->state->type].flags & UART_STARTECH) {
serial_outp(info, UART_LCR, 0xBF);
--
Fabrice Gautier <[EMAIL PROTECTED]>
-
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