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From: bob@atom.OZ (Bob Backstrom)
Newsgroups: comp.unix.wizards
Subject: Re: tcsh bug in sunos 4
Message-ID: <1501@atom.OZ>
Date: 18 Mar 90 15:48:50 GMT
References: <53442@bu.edu.bu.edu>
Reply-To: bob@atom.oz (Bob Backstrom)
Organization: Australian Nuclear Science & Technology Organisation
Lines: 38
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In article <53442@bu.edu.bu.edu> jdh@bu-pub.bu.edu (Jason Heirtzler) writes:
>There's a particularly annoying tcsh bug (race condition?) that
>appeared in SunOS 4, where pipelined jobs randomly hang
>
>        % strings undump | more
>        strings undump | more
>
>        Stopped (tty output)
>        [4] 24416 24417
>
>It has been suggested that compiling with -Dvfork=fork makes the
>problem less common, but doesn't fix the real problem.
>
>As since this code is doubtlessly really nasty, I don't relish the
>task facing me.  So, Has anyone already fixed it?
>
>
>-------------------------------------------------------------------------
>Jason Heirtzler           (617) 353-2780       jdh@bu-pub.bu.edu
>Information Technology    Boston University    ..!harvard!bu.edu!bu-pub!jdh
>-------------------------------------------------------------------------
>Jason Heirtzler           (617) 353-2780       jdh@bu-pub.bu.edu
>Information Technology    Boston University    ..!harvard!bu.edu!bu-pub!jdh  

	This very same thing occurs very regularly using tcsh on our
Pyramid MIServer.  The one I notice all the time is when I alias h
to be "history | more".  It only takes 3 or 4 invokations of h to get
the mysterious Stopped (tty output) message...

	It looks like the Stopping gene has been passed down from
generation to generation .....                  :-)


-- 
* ACSNET: bob@atom.oz.au Bob Backstrom,
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