Date: Wed, 13 Dec 1995 23:03:12 +0300 (MSK) From: =?KOI8-R?Q?=E1=CE=C4=D2=C5=CA_=FE=C5=D2=CE=CF=D7?= (aka Andrey A. Chernov, Black Mage) <ache@astral.msk.su> To: Bruce Evans <bde@zeta.org.au>, Terry Lambert <terry@lambert.org> Cc: eugen@rd.zgik.zaporizhzhe.ua, hackers@FreeBSD.ORG, yura@rd.zgik.zaporizhzhe.ua Subject: Re: bug or feature in kern/tty.c Message-ID: <Wb06ppmuW2@ache.dialup.ru> In-Reply-To: <199512131818.LAA03398@phaeton.artisoft.com>; from Terry Lambert at Wed, 13 Dec 1995 11:18:46 -0700 (MST) References: <199512131818.LAA03398@phaeton.artisoft.com>
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In message <199512131818.LAA03398@phaeton.artisoft.com> Terry Lambert
writes:
>> >I found strange thing in 2.1.0-RELEASE (and -current) in kern/tty.c.
>> >When carrier was lossed then ttymodem() set TS_ZOMBIE and clear
>> >TS_CONNECTED in tp->t_state. But TS_ZOMBIE is cleared only in ttioctl()
>> >TIOCSETA* when line is setted to ignore modem status and when line is closed.
>>
>> POSIX says that (what I call the) zombie state remains until the line is
>> closed. Clearing it when CLOCAL is raised is a special hack that helped
>> very old (1.1.5) versions of slattach and perhaps other broken programs
>> work right.
>FYI: Of the 120 or so UNIX systems I ported TERM to while I was
>at Century Software, only SCO Xenix 2.3.0 behaved this way, and they
>fixed it in 2.3.1 after we reported the bug.
BTW, it seems we talk about different things. As I understand the original
problem, the question is: WHY SLATTACH NOT RECONNECTS WHEN CARRIER
ESTABLISHED AGAIN (AUTOMATICALLY BY MODEM)?
I.e.
1) driver needs to track carrier when in TS_ZOMBI and
set TS_CONNECTED, clear TS_ZOMBI when carrier
appearse on the line.
2) Slattach not need exit on SIGHUP but wait reasonable time
until carrier will be up again.
--
Andrey A. Chernov : And I rest so composedly, /Now, in my bed,
ache@astral.msk.su : That any beholder /Might fancy me dead -
http://dt.demos.su/~ache : Might start at beholding me, /Thinking me dead.
RELCOM Team,FreeBSD Team : E.A.Poe From "For Annie" 1849
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