namei kernel function

Question

Level 1

0 points

namei kernel function

I'm developing a kernel module. I'm trying to develop my own unlink function in order to apply some filters in the kernel. However, whenever i try to invoke the function namei(), i get a kernel panic. In my first steps, i'm almost copying the kernel source code of the syscall unlink and the function namei is one of the first functions that are called.

Furthermore, I have tried to find the source code of the function namei, and i've not found it.

Therefore, can I use that function? does anyone know why i always enter in kernel panic?

Thanks in advance

Mac Mini Mac Book, Mac OS X (10.5.4)

Posted on Jun 26, 2009 5:44 AM

Reply

Answer 1

Jun 26, 2009 8:33 AM in response to eval

Define "kernel module" and how you're building it.

Reply

Answer 2

eval Author

Level 1

0 points

Jun 28, 2009 11:32 PM in response to RanjeetJones

I'm building a kernel extension module (kext) with Xcode Project.I'm trying to create a backup of all the files that are deleted in the system. My idea is whenever an unlink syscall is called, i could create a new link. The problem is that i don't know how to use the namei function.

Thanks in advance!!

Reply

Answer 3

Jun 28, 2009 11:56 PM in response to eval

http://www.opensource.apple.com/source/xnu/xnu-792.13.8/bsd/sys/namei.h

Reply

Answer 4

eval Author

Level 1

0 points

Jun 29, 2009 12:57 AM in response to RanjeetJones

http://www.opensource.apple.com/source/xnu/xnu-792.13.8/bsd/sys/namei.h

is there a .c file where i can find the source code? In my kext, when i call to the namei() function, a kernel panic appears. Therefore, does it mean that i can't use that function?

i also try to find the content of the vnode_t struct and i also do not have success.

Thanks in advance!

Message was edited by: eval

Reply

Answer 5

Jun 29, 2009 10:11 AM in response to eval

The fact that you don't know what to put in these structures is probably the reason why you're causing a panic.

Reply

Answer 6

eval Author

Level 1

0 points

Jun 30, 2009 6:20 AM in response to RanjeetJones

If you don't know the answer why you write the first you think. i have written some questions and you have not been helpful with your answers. So please, take a rest and if you want to help, start again reading the forum.

Thanks in advance!!

Reply

Answer 7

Jun 30, 2009 9:32 AM in response to eval

If you don't know what parameters to pass to a function then why do you call it with garbage and expect it to do anything other than crash? Nobody can tell you what you're doing wrong because you haven't told anyone what it is you're actually doing.

Reply