Path: utzoo!attcan!uunet!mcsun!hp4nl!tuegate.tue.nl!tuewsd!wsinpdb
From: wsinpdb@lso.win.tue.nl (Paul de Bra)
Newsgroups: comp.unix.wizards
Subject: Re: Phantom CPU gobbler?!
Message-ID: <1277@tuewsd.win.tue.nl>
Date: 2 Jul 90 12:31:58 GMT
References: <960004@teecs.UUCP>
Sender: wsinpdb@win.tue.nl (Paul de Bra)
Organization: Eindhoven University of Technology, The Netherlands
Lines: 15

In article <960004@teecs.UUCP> belkin@teecs.UUCP (Hershel Belkin) writes:
>...
>Every so often I fins a shell process (sh or ksh) which has somehow
>become dis-associated with its logon session.  By this I mean that
>the shell's PPID is "1", and the user is no longer logged on.
>...

This is the infamous trap/signal/eof bug, which I don't know exactly,
but some combination of trapping and sending signals and having
end-of-file on standard input causes an infinite loop in the Bourne
and Korn shell, at least in some Unix versions which haven't fixed the bug.

Anyone know the full scoop?

Paul.