1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/*
Copyright (C) Andrew Tridgell 1998
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* support the max connections option */
#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;
}
|
