How to open a file with KLD

[victormenegusso]

Hello, everybody,
I would like to know how to open a file using kld, and be able to write the same. Because I can not use the system call

I create a Character Device, where have information, my KLD read a Character Device and write the information on file .txt for example.

Thanks:stud

 

[lockfile]

Check out ftp.FreeBSD.org, in the doc nodes there are files there in a subnode I think will get you started. It has a tutorial and a little driver skeleton. "Driver" or similar....

 

[victormenegusso]

Hi lockfile, i find a folder 'drivers', but just have a .sh, not .c

thanks

 

[victormenegusso]

I try to use open() from fcntl.h but it does not work.

 

[victormenegusso]

I find:

int kern_open(struct thread *td, char *path, enum uio_seg pathseg,int flags, int mode);
int kern_readv(struct thread *td, int fd, struct uio *auio);
int kern_writev(struct thread *td, int fd, struct uio *auio);

Link
http://fxr.watson.org/fxr/source/sys/syscallsubr.h?v=FREEBSD82;