<br><br><div class="gmail_quote">On Wed, Aug 10, 2011 at 10:43 PM, Vaibhav Jain <span dir="ltr"><<a href="mailto:vjoss197@gmail.com">vjoss197@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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<div class="gmail_quote">On Wed, Aug 10, 2011 at 2:14 PM, Jeff Haran <span dir="ltr"><<a href="mailto:jharan@bytemobile.com" target="_blank">jharan@bytemobile.com</a>></span> wrote:<br>
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<p class="MsoNormal"><b><span style="font-size:10pt">From:</span></b><span style="font-size:10pt"> <a href="mailto:kernelnewbies-bounces@kernelnewbies.org" target="_blank">kernelnewbies-bounces@kernelnewbies.org</a> [mailto:<a href="mailto:kernelnewbies-bounces@kernelnewbies.org" target="_blank">kernelnewbies-bounces@kernelnewbies.org</a>] <b>On Behalf Of </b>Vaibhav Jain<br>
<b>Sent:</b> Wednesday, August 10, 2011 12:09 PM<br><b>To:</b> <a href="mailto:kernelnewbies@kernelnewbies.org" target="_blank">kernelnewbies@kernelnewbies.org</a><br><b>Subject:</b> Need help in understanding sysfs<u></u><u></u></span></p>
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<p class="MsoNormal">Hi,<u></u><u></u></p></div>
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<p class="MsoNormal">I need to undestand sysfs and make changes to it.<u></u><u></u></p></div>
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<p class="MsoNormal">Please provide me with some good references.<u></u><u></u></p></div>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal">Thanks<u></u><u></u></p></div>
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<p class="MsoNormal">Vaibhav Jain<u></u><u></u></p></div></div></div>
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<p class="MsoNormal"> <span style="color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d;font-size:11pt">First thing to try would be your favorite search engine. If you do a search for “lwn <topic>” you’ll often be taken to a LWN article that is on topic though perhaps a bit dated. For instance, a search for “lwn sysfs” takes you to here:<u></u><u></u></span></p>
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<p class="MsoNormal"><a href="http://lwn.net/Articles/54651/" target="_blank">http://lwn.net/Articles/54651/</a><u></u><u></u></p>
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<p class="MsoNormal">Probably a good place to start. Linux is mostly good code, but the documentation that comes with the kernel sources mostly sucks, so the web is your friend in this regard.<u></u><u></u></p>
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</div></div><div> Hi,</div>
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<div>Sorry for the vague question. I would clarify. There are two things I need :</div>
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<div>1- I need to know how information is organized in the sysfs and understand the concepts of kobjects , attributes etc.</div>
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<div>2.- I need to understand how to create a file entry in the sysfs. Particulary i need to create an entry inside the directory /sys/devices/system/cpu/ . I will be required</div>
<div>to write some driver in the future which will accept inputs from this file but I am not very clear about that right now. So I was thinking of just trying to create an entry for now.</div>
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<div>I tried searching the web but there are not many articles that explain the above two in detail unlike procfs for which there are a lot of articles with samples.</div>
<div>The ones I found were not very interesting to read.</div>
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<div>Thanks</div>
<div>Vaibhav Jain</div><font color="#888888">
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<div> </div></font></blockquote><div>Have you used google? <br>The third link in the google is a classic paper by patrick Mochel, it pretty much covers all the basics.<br><br>There is a lot of information on sysfs in Robert love's LKD and <br>
There is an entire chapter on sysfs in LDD, which tells all the details about creating entry and other basics. <br><br> <br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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