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/*
* (c) Copyright 1990, Kim Fabricius Storm. All rights reserved.
* Copyright (c) 1996-2005 Michael T Pins. All rights reserved.
*
* Master/slave communication and locking.
*/
/*
* proto_lock() modes
*/
#include <stdio.h>
#define PL_SET 1 /* set lock (if not set) */
#define PL_SET_WAIT 2 /* set lock (wait until set) */
#define PL_SET_QUICK 3 /* as _WAIT, but using sleep(1) */
#define PL_CLEAR 4 /* clear lock */
#define PL_CLEAR_WAIT 5 /* wait for lock to disappear */
#define PL_CHECK 6 /* check running status */
#define PL_WAKEUP 7 /* send wakeup (must succeed) */
#define PL_WAKEUP_SOFT 8 /* send wakeup (may fail) */
#define PL_TERMINATE 9 /* send termination */
#define PL_TRANSFER 10 /* transfer lock to current process (forked) */
/*
* types for send_master(type, group, opt, arg)
*/
#define SM_SET_OPTION 'O' /* set option to arg (toggle if -1) */
#define SM_SET_FLAG 'F' /* opt=set/clear flag 'arg' in group */
#define SM_RECOLLECT 'R' /* recollect group (or all groups if NULL) */
#define SM_EXPIRE 'X' /* expire group (or all groups if NULL) */
#define SM_SCAN_ONCE 'U' /* scan unconditionally (ignore active) */
int proto_lock(int, int);
FILE *open_gate_file(int);
void send_master(char, group_header *, int, long);
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