Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!wugate!uunet!mcsun!ukc!edcastle!aiai!richard
From: richard@aiai.ed.ac.uk (Richard Tobin)
Newsgroups: comp.unix.wizards
Subject: Re: Strange SUN behaviour.
Keywords: killing, ctrl-d, sun3, OS4.
Message-ID: <1203@skye.ed.ac.uk>
Date: 10 Oct 89 16:22:55 GMT
References: <703@hrc63.uucp>
Reply-To: richard@aiai.UUCP (Richard Tobin)
Organization: AIAI, University of Edinburgh, Scotland
Lines: 21

In article <703@hrc63.uucp> paj@hrc63.uucp (Mr P Johnson "Baddow") writes:
>This package plays
>tricks with the stack and also does some signal management for non-blocking
>I/O.

>When one of these programs is killed by a signal (even kill -9), the shell
>it is running in dies as well. 

Sounds like the terminal is being left in non-blocking i/o mode - this
will cause reads by the shell to return EWOULDBLOCK.

You could put a wrapper round the program that resets the tty to blocking
i/o mode if it's killed; it just needs to do something like

   fcntl(open("/dev/tty"), F_SETFL, 0);

-- Richard
-- 
Richard Tobin,                       JANET: R.Tobin@uk.ac.ed             
AI Applications Institute,           ARPA:  R.Tobin%uk.ac.ed@nsfnet-relay.ac.uk
Edinburgh University.                UUCP:  ...!ukc!ed.ac.uk!R.Tobin