Date: Wed, 4 Sep 2002 04:56:49 -0600 From: John E Hein <jhein@timing.com> To: "Duncan Barclay" <dmlb@dmlb.org> Cc: "Mark Santcroos" <marks@ripe.net>, <emulation@FreeBSD.ORG> Subject: Re: TIOCSCTTY not implemented in linuxulator? Message-ID: <15733.59121.143526.699051@brain.timing.com> In-Reply-To: <000801c253f7$2cae8ea0$6d6020c2@pc598cam> References: <XFMail.20020903224917.dmlb@computer.my.domain> <20020904020952.GB7157@dhcp01.pn.xcllnt.net> <20020904064620.GA713@laptop.6bone.nl> <000801c253f7$2cae8ea0$6d6020c2@pc598cam>
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Duncan Barclay wrote at 10:40 +0100 on Sep 4:
> > Hi Duncan,
> >
> > Can you find out (ktrace) to which devices it is sending these ioctls?
>
> It's the tty side of a pty/ttp pair. Matlab spawns a subprocess, and it's
> the subprocess that issues these ioctls.
See this freebsd-emulation thread ("can't quit matlab"):
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&frame=right&th=206ec3e38e06e5d2&seekm=15218.39637.311548.512594_localhost.econ.vt.edu%40ns.sol.net#link1
Note that the 540e is TIOCSCTTY:
/usr/src/linux-2.2.19/include/asm-i386/ioctls.h:#define TIOCSCTTY 0x540E
Particularly look at the 3rd message in the thread that talks about the
/dev/ptmx workaround and unix98 ptys.
If someone could solve this, it'd be great.
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