Function fuse_reply_open 

pub unsafe extern "C" fn fuse_reply_open(
    req: fuse_req_t,
    fi: *const fuse_file_info,
) -> c_int

Reply with open parameters

currently the following members of ‘fi’ are used: fh, direct_io, keep_cache

Possible requests: open, opendir

@param req request handle @param fi file information @return zero for success, -errno for failure to send reply