Date: Wed, 23 Mar 2005 03:36:31 -0800
From: Andrew Morton <akpm@osdl.org>
To: "shafa.hidee" <shafa.hidee@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Redirecting output
Message-Id: <20050323033631.0f7ad778.akpm@osdl.org>
In-Reply-To: <001e01c52f74$2f27daa0$6a88cb0a@hss.hns.com>
References: <001e01c52f74$2f27daa0$6a88cb0a@hss.hns.com>
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"shafa.hidee" <shafa.hidee@gmail.com> wrote:
>
>      I have created a dummy module for learning device driver in linux. I
>  want to redirect the standard output of printk to my xterm. But by default
>  it is redirected to tty.
> 
>  I have remote logged into the machine.

You can do this from within the module_init() handler only:

module_init_handler(...)
{
	mm_segment_t old_fs;

	....
	old_fs = set_fs(KERNEL_DS);
	sys_write(1, "foo\n", 4);
	set_fs(old_fs);
	...
}

The text comes out on modprobe's standard output.

Don't tell anyone I told you this.

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