[SLUG] ask help for driver_writing

[henry]

Dears: 1.    I can find head_file(linux/fs.h) for ioctl() used in kernel_module .     Where can I find head_file for ioctl() used in User_applcation ?   2.  There is no simple  corespondence between  their parameters .     Could someone show hint for their relation.   Tks In Advance ! Henry