From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <4cfecdf7a036a48ce135771f8ac3c228@hamnavoe.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] v8 shell
From: Richard Miller <miller@hamnavoe.demon.co.uk>
In-Reply-To: <b7cfe141aa149a25c049c5ae2904f72f@collyer.net>
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Date: Sun, 16 Nov 2003 12:21:14 +0000
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> I suppose one could write a simple prefix command, taking a file name,
> descriptor number, and command to run:
>
> 	rdwr /mnt/webcookies/http 4 'echo http://www.foo.baz >[1=4]; cat <[0=4]'

Or generalise by adding a '-c command' option to syscall(1):

	syscall -c 'echo http://www.foo.baz >[1=3]; cat <[0=3]' open /mnt/webcookies/http 2

Then you could use it for other things, eg to execute a command as user none:

	syscall -c command write 3 none 4 >[3]/dev/user