linux-kernel - Re: [RFC][PATCH 3/6] SLIM main patch

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Date:	Fri, 28 Jul 2006 06:01:35 +0000
From:	Pavel Machek <pavel@....cz>
To:	Kylene Jo Hall <kjhall@...ibm.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	LSM ML <linux-security-module@...r.kernel.org>,
	Dave Safford <safford@...ibm.com>,
	Mimi Zohar <zohar@...ibm.com>, Serge Hallyn <sergeh@...ibm.com>
Subject: Re: [RFC][PATCH 3/6] SLIM main patch

Hi!

> SLIM is an LSM module which provides an enhanced low water-mark
> integrity and high water-mark secrecy mandatory access control
> model.

Still no Documentation/ changes. Uses // comments to comment out code.

> +static char *get_token(char *buf_start, char *buf_end, char delimiter,
> +		       int *token_len)
> +{
> +	char *bufp = buf_start;
> +	char *token = NULL;
> +
> +	while (!token && (bufp < buf_end)) {	/* Get start of token */
> +		switch (*bufp) {
> +		case ' ':
> +		case '\n':
> +		case '\t':
> +			bufp++;
> +			break;
> +		case '#':
> +			while ((*bufp != '\n') && (bufp++ < buf_end)) ;
> +			bufp++;
> +			break;
> +		default:
> +			token = bufp;
> +			break;
> +		}
> +	}
> +	if (!token)
> +		return NULL;
> +
> +	*token_len = 0;
> +	while ((*token_len == 0) && (bufp <= buf_end)) {
> +		if ((*bufp == delimiter) || (*bufp == '\n'))
> +			*token_len = bufp - token;
> +		if (bufp == buf_end)
> +			*token_len = bufp - token;
> +		bufp++;
> +	}
> +	if (*token_len == 0)
> +		token = NULL;
> +	return token;
> +}

What are these tokens and why do we want to play with strings in
kernel?

							Pavel

-- 
Thanks for all the (sleeping) penguins.
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