Function fuse_main_real 

pub unsafe extern "C" fn fuse_main_real(
    argc: c_int,
    argv: *mut *mut c_char,
    op: *const fuse_operations,
    op_size: size_t,
    user_data: *mut c_void,
) -> c_int

The real main function

Do not call this directly, use fuse_main()