Character device (ioctl)

K

Hello All,

I have written a driver program for character device and I use ioctl(2) from user space to communicate with the device. I am able to open the device and execute the command for the respective ioctl(2) but the address the I am sending from the user space is different and the ioctl(2) returns me a BAD ADDRESS....

Thank you.

protocelt

Aug 26, 2015

#2

Hi.

If you don't get an answer to your question here, please consider also joining and posting this question to the freebsd-hackers mailing list. This is where most of the FreeBSD developers discuss and answer questions of this nature.

j4ck

Aug 27, 2015

#3

kumaraparameshwaran said:
Hello All,

I have written a driver program for character device and I use ioctl(2) from user space to communicate with the device. I am able to open the device and execute the command for the respective ioctl(2) but the address the I am sending from the user space is different and the ioctl(2) returns me a BAD ADDRESS....

Thank you.

Hi,

Post your code, please.