From: "Andrej Borsenkow" <Andrej.Borsenkow@mow.siemens.ru>
To: "Bart Schaefer" <schaefer@candle.brasslantern.com>,
"ZSH workers mailing list" <zsh-workers@sunsite.auc.dk>
Subject: Blocking zpty once again
Date: Fri, 3 Mar 2000 21:01:54 +0300 [thread overview]
Message-ID: <000001bf853a$8f1d1b30$21c9ca95@mow.siemens.ru> (raw)
In-Reply-To: <1000303173706.ZM20761@candle.brasslantern.com>
at one point while trying the changes below one of the zsh
> running inside zpty exited prematurely, and the result was that comptest
> locked up and had to be killed. I didn't know how long to wait before
> giving up on it.
>
Yes. Playing with zpty I found, that there is no way to kill zpty read. I
tried
zpty -r cmd foo pat
with wrong (as it turned out) pattern. It was in interactive shell, and
neither of ^C, ^\, ^Z helped.
Exactly for this reason we need either read with timeout or general purpose
select (nice to have independently of zpty).
Also, I'm not sure what happens when child exits. I tried something simple
as
zsh cat cat /etc/profile
zsh -r cat
but got nothing. Looks like pty was flushed in this case. Child did not
exist anymore, but zsh still insisted on valid `cat' handle. I'd expect it
to detect dead pty - not sure, how to do it in general case.
/andrej
next prev parent reply other threads:[~2000-03-03 18:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-03-03 11:43 Running tests without installing Zsh Andrej Borsenkow
2000-03-03 17:37 ` PATCH: " Bart Schaefer
2000-03-03 18:01 ` Andrej Borsenkow [this message]
2000-03-03 18:23 ` Zefram
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