[tex-live] Re: Re: Please enable ipc in tex

Jonathan Fine J.Fine at open.ac.uk
Thu Jul 8 18:22:13 CEST 2004

"Olaf Weber" <olaf at infovore.xs4all.nl> wrote in message
news:87fz86kuo6.fsf at infovore.xs4all.nl...
> Jonathan Fine writes:
> > I don't recall exactly what --enable-ipc adds to TeX beside this.
> Note that I am not the author of the ipc code, and don't know _that_
> much about it.  It seems to me that aggressive flushing of the dvi
> file enabled by --ipc is a side-effect of needing to do this on the
> socket.
> The ipc code definitely opens a socket when --ipc is given.  To be
> precise, it is a UNIX domain socket named "$HOME/.TeXview_Pipe".  With
> --ipc-start it also tries to run "open `which TeXview`" as the
> consumer (see IPC_SERVER_CMD in texmfmp.c).
> I suspect that for large dvi files, if there is no listener on the
> socket, TeX will just hang on a write on the socket after a while.  It
> looks to me like TeX writes typically 6 bytes per page on the socket
> (which is really used to synchronize the viewer with TeX).  With OS
> buffers typically 1024 or 4096 bytes, that means 150+ or 650+ pages.
> If you (generic you) want just the aggressive flushing, feel free to
> propose a patch.  I think I've figured what would be required, but it
> is something I'd like to see independent confirmation of.
> Also a proposal on how to specify it on the command line would be
> useful.  (As usual, I'm not saying I'd incorporate it, but I do want
> to know what lines of thought people have in the matter, if only to
> make sure that I don't do something by myself which turns out to be
> utterly useless.)

Thanks for the consideration and all the informed comment.

Here are my views on the matter.

The present behaviour, once we --enable-ipc, is adequate.

And it has the great merit of being compatible with existing
distributions - such as Debian.

On Windows, loosing the Unix domain socket would be fine.

I hope that at least for Unix/Linux, tex will have ipc enabled
from now on.


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