Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262748AbVCWRY1 (ORCPT ); Wed, 23 Mar 2005 12:24:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261966AbVCWRXM (ORCPT ); Wed, 23 Mar 2005 12:23:12 -0500 Received: from alog0254.analogic.com ([208.224.222.30]:42441 "EHLO chaos.analogic.com") by vger.kernel.org with ESMTP id S262775AbVCWRSr (ORCPT ); Wed, 23 Mar 2005 12:18:47 -0500 Date: Wed, 23 Mar 2005 12:16:16 -0500 (EST) From: linux-os Reply-To: linux-os@analogic.com To: linux lover cc: linux-kernel@vger.kernel.org Subject: Re: Accessing data structure from kernel space In-Reply-To: <20050323164129.70589.qmail@web52204.mail.yahoo.com> Message-ID: References: <20050323164129.70589.qmail@web52204.mail.yahoo.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2456 Lines: 78 On Wed, 23 Mar 2005, linux lover wrote: > Hello linux-os, > --- linux-os wrote: >> On Wed, 23 Mar 2005, linux lover wrote: >> >>> Hello all, >>> I have one linked list data structure added >> to >>> a file in kernel source code which has some kernel >>> info. I want to acess that linked list structure >> from >>> user space. Is that possible?? >>> Also how to add own system call usable at >> user >>> level from kernel module?? >>> regards, >>> linux_lover. >>> >> >> Many people will tell you to use the /proc >> file-system. >> I suggest you make a simple "character" driver and >> access >> your kernel structure using ioctl() or mmap(). >> > How can i access that linked list structure in > kernel at user space say if i write character driver > as /dev/readll then how to link that structure to > device driver > ? Gawd.... `man ioctl`. Execute that. Learn. Write code that handles such a call in your module. `man mmap`. execute that. Learn. Write code that handles memory-mapping in your module. >> You don't add your own system call __ever__, even if >> you >> are a long-time kernel developer. The current API >> already >> has lots of standard interface capabilities. >> Thinking, even >> for an instant, that you need more means that you >> don't >> understand Unix/Linux. >> >> Cheers, >> Dick Johnson >> Penguin : Linux version 2.6.11 on an i686 machine >> (5537.79 BogoMips). >> Notice : All mail here is now cached for review by >> Dictator Bush. >> 98.36% of all statistics are >> fiction. >> > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > Cheers, Dick Johnson Penguin : Linux version 2.6.11 on an i686 machine (5537.79 BogoMips). Notice : All mail here is now cached for review by Dictator Bush. 98.36% of all statistics are fiction. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/