Consider parsing the arguments passed

[linkmauve]

I’m mostly interested in ioctl(), where the arguments are dependent on the architecture in use.

For instance, strace parses a V4L2 ioctl() that way:

ioctl(3, VIDIOC_ENUM_FMT, {index=2, type=V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE, flags=V4L2_FMT_FLAG_COMPRESSED, description="VP8 Frame", pixelformat=v4l2_fourcc('V', 'P', '8', 'F') /* V4L2_PIX_FMT_VP8_FRAME */}) = 0

Current lurk instead prints the raw values of the ioctl() number and the address of the buffer being passed to it, both of which are pretty useless:

[139118] ioctl(0, 3225441794, 281474976706312) = 29

I’m currently working with V4L2 but many Linux subsystems use ioctl() as their uAPI.