Messages in this thread | | | Date | Wed, 23 Mar 2005 12:16:16 -0500 (EST) | From | linux-os <> | Subject | Re: Accessing data structure from kernel space |
| |
On Wed, 23 Mar 2005, linux lover wrote:
> Hello linux-os, > --- linux-os <linux-os@analogic.com> 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/
| |