Re: [PATCH] sysctl: Deprecate sys_sysctl in a user space visible fashion.

[Andrew Morton <akpm@linux-foundation.org>]

On Tue, 28 Aug 2007 16:40:15 -0600 ebiederm@xmission.com (Eric W. Biederman) wrote:

> +static int deprecated_sysctl_warning(struct __sysctl_args *args)
> +{
> +	static int msg_count;
> +	int name[CTL_MAXNAME];
> +	int i;
> +
> +	/* Read in the sysctl name for better debug message logging */
> +	for (i = 0; i < args->nlen; i++)
> +		if (get_user(name[i], args->name + i))
> +			return -EFAULT;
> +
> +	/* Ignore accesses to kernel.version */
> +	if ((args->nlen == 2) && (name[0] == CTL_KERN) && (name[1] == KERN_VERSION))
> +		return 0;

Do we want to do all the above if msg_count>=5?

> +	if (msg_count < 5) {
> +		msg_count++;
> +		printk(KERN_INFO
> +			"warning: process `%s' used the deprecated sysctl "
> +			"system call with ", current->comm);
> +		for (i = 0; i < args->nlen; i++)
> +			printk("%d.", name[i]);
> +		printk("\n");
> +	}
> +	return 0;
> +}