commit https://github.com/vim/vim/commit/155500077c80cdb5d9c63996000c011b66a676bf Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jan 31 18:45:24 2016 +0100 patch 7.4.1228 Problem: copy() and deepcopy() fail with special variables. (Nikolai Pavlov) Solution: Make it work. Add a test. Closes https://github.com/vim/vim/issues/614.

/*
 * if_sniff.h Interface between Vim and SNiFF+
 */

#ifndef __if_sniff_h__
#define __if_sniff_h__

extern int  want_sniff_request;
extern int  sniff_request_waiting;
extern int  sniff_connected;
extern int  fd_from_sniff;
extern void sniff_disconnect(int immediately);
extern void ProcessSniffRequests(void);
extern void ex_sniff(exarg_T *eap);

#endif