On 19:32 Thu 07 Feb 2008, Mayank Kaushik wrote: > I am puzzled about what IOCTLs are and what they are used for. I could not > understand much from the the man page for ioctl. I was very puzzled about ioctls when I first started using Unix too. :) In any case, an ioctl is short for "I/O Control" and is used to perform functions on device entries (/dev/video0 for example). > A description of what ioctls are used for (alongwith an example usage) would > be very helpful. An example from the video4linux subsystem would be this call to turn off a video stream: enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE; ret = ioctl(fd, VIDIOC_STREAMOFF, &type) Where fd is an open /dev/video* entry. Hope that helps. Cheers, Brandon -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
