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Message-Id: <199805061310.GAA26134@hub.freebsd.org>
Date: Wed, 6 May 1998 06:10:02 -0700 (PDT)
From: archer@lucky.net
To: freebsd-gnats-submit@FreeBSD.ORG
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Subject: bin/6536: pppd doesn't restore drainwait for tty
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>Number:         6536
>Category:       bin
>Synopsis:       pppd doesn't restore drainwait for tty
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed May  6 06:10:01 PDT 1998
>Last-Modified:
>Originator:     Alexander Litvin
>Organization:
Lucky Net Ltd
>Release:        2.2.6-STABLE
>Environment:
FreeBSD sivka.carrier.kiev.ua 2.2.6-STABLE FreeBSD 2.2.6-STABLE #2: Wed May  6 1
1:31:57 EEST 1998     archer@sivka.carrier.kiev.ua:/usr/src/sys/compile/sivka  i
386
>Description:
I do not actually know at what exact conditions it happens, but
sometimes when pppd receives SIGHUP, it fails somewhere with message
"ioctl(PPPIOCSFLAGS): Inappropriate ioctl for device". When pppd
exits after that, drainwait for that tty device is -1, and with such
drainwait tty fails to accept large writes. For me it takes place with
dgb0: PC/Xe 64K, I do not know if it is the case for other serial devices.
>How-To-Repeat:
Set up a dialup ppp server, using pppd and DIGI PX/Xe serial board.
When pppd fails with "ioctl(PPPIOCSFLAGS): Inappropriate ioctl for device",
check drainwait value for the tty (e.g. with comcontrol).
>Fix:
As a workaround I patched pppd to restore drainwait value.
>Audit-Trail:
>Unformatted:

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