From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Sat,  6 Mar 2010 13:41:10 -0500
Message-ID: <a2d238df1003061041s58f2f853q858353e83e41c789@mail.gmail.com>
From: Eoghan Sherry <ejsherry@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
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Subject: Re: [9fans] acme(4) and addr=dot
Topicbox-Message-UUID: e183b1ce-ead5-11e9-9d60-3106f5b1d025

> % {echo 'addr=dot'; 9p read acme/70/addr >[1=2]} | 9p write acme/70/ctl
>          0           0 %
>
> No help.  Am I doing something wrong?

Addr is reset to 0,0 once opened. So, you need to perform these
operations in order: open addr; write ctl; then read addr.

There's a nice way to do this if you can give rc access to the acme
files (try 9pfuse(4) with FUSE).

;9pfuse unix!`{namespace}^/acme mnt
;<mnt/acme/1/addr{
	echo 'addr=dot'>>mnt/1/ctl;
	cat;
}
         93         234 ;

By the way, your question motivated me to give 9pfuse a try. Also,
it lead to my realization that, in rc, you can put the redirections
in front of the command. Hooray!

Eoghan