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cdevice-driverfreebsdioctl

implementation of ioctl in freebsd

I want to know how to implement ioctl command for a character device in FreeBSD. I already write a character device with open() close() read() write() but I don't know what argument should I pass to ioctl_handler. Does anybody know the prototype of d_ioctl_t?

Solution

  • A quick google search found this page where d_ioctl_t is defined as:

    typedef int d_ioctl_t(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td);