Question

I am adding some code to an existing FreeBSD device driver and I am trying to pass a char* from user space to the driver. I ve implemented a custom ioctl() command using the _IOW macro like so: #define TIBLOOMFILTER _IOW(0,253,char*)

My call looks something like this:

int file_desc = open("/dev/ti0", O_RDWR);
ioctl(file_desc, TIBLOOMFILTER, (*filter).getBitArray());
close(file_desc);

When I call ioctl() I get: Inappropriate ioctl for device as an error message. Any guess as to what may be doing wrong? I ve defined the same macro in my device driver, and added it to the case statement.

Answer 1

Did you register your ioctl handler with

.d_ioctl  = ioctl_handler

in ?devsw (char/block device switch table)?

友情链接