Reading a configuration file from a driver code during intialization.

[sivakumar.subramani at wipro.com]

Hi Mark,



As I mentioned in the previous mail, the main issue is to read a
Configuration parameter file from driver code. I am already using Sysctl
variables as mentioned below,



Currently I have written a small kernel module that will create a sysctl
variable and update with a default value. After loading this module,
using shell scripts, I read the configuration file and get the user set
values and update the sysctl variable in that value. Then I will load my
driver where I read the sysctl variable to get the required values set
by the user in the configuration file.



This is a round about way. Is there is any other way to read a
configuration file from Driver code.





Thanks,

~Siva

-----Original Message-----
From: John-Mark Gurney [mailto:gurney_j at resnet.uoregon.edu]
Sent: Thursday, September 14, 2006 9:43 PM
To: SIVAKUMAR SUBRAMANI (WT01 - Computing Systems & Storage)
Cc: freebsd-net at FreeBSD.org
Subject: Re: Reading a configuration file from a driver code during
intialization.



sivakumar.subramani at wipro.com wrote this message on Thu, Sep 14, 2006 at
12:16 +0530:

> Is there is any other solution to the above problem?

>

>

>

> Actually I am looking for some thing similar to Module loadable

> parameters in the Linux Device Driver.



look at kenv...  It lets you set arbitrary values and access them in

the kernel...  you can use the TUNABLE_* macros provided by sys/kernel.h

to make accessing them easier...



If the variables need to change at run time, look at SYSCTL...



--

  John-Mark Gurney                        Voice: +1 415 225 5579



     "All that I will do, has been done, All that I have, has not."




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