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/*
* Support the max connections option.
*
* Copyright (C) 1998 Andrew Tridgell
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, visit the http://fsf.org website.
*/
#include "rsync.h"
/****************************************************************************
simple routine to do connection counting
****************************************************************************/
int claim_connection(char *fname,int max_connections)
{
int fd, i;
if (max_connections <= 0)
return 1;
fd = open(fname,O_RDWR|O_CREAT, 0600);
if (fd == -1) {
return 0;
}
/* find a free spot */
for (i=0;i<max_connections;i++) {
if (lock_range(fd, i*4, 4)) return 1;
}
/* only interested in open failures */
errno = 0;
close(fd);
return 0;
}
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