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