linux-kernel - Re: Question about Reiser4

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Date:	Mon, 23 Apr 2007 21:17:53 -0400
From:	Theodore Tso <tytso@....edu>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Eric Hopper <hopper@...ifarious.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: Question about Reiser4

On Mon, Apr 23, 2007 at 05:31:29PM -0700, H. Peter Anvin wrote:
> Heh.  sys_read_tree() -- walk a directory tree and return it as a data 
> structure in memory :)

But maybe you don't want every single file in the directory, but some
subset of the files in the directory tree.  So before you know it:

sys_fs_sql("SELECT port,userid,daemon FROM /etc/inetd.conf.d "
	"WHERE protocol=='tcp'", buf, sizeof(buf));

The question is where do you stop on the slippery slope, and is it
really all that harder than simply parsing a /etc/gitconfig or
/etc/e2fsck.conf file.  There are plenty of parsers or database
libraries already written, and many of them are quite efficient.  And
personally, I'd much rather edit a single /etc/gitconfig or
/etc/e2fsck.conf file using emacs than have to cd through 3 or 4
levels of directories to edit each 2-3 byte file one at a time.  But
to each their own....

					- Ted
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