Commit | Line | Data |
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0c515f17 AT |
1 | /* |
2 | Copyright (C) Andrew Tridgell 1998 | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation; either version 2 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; if not, write to the Free Software | |
16 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /* support the max connections option */ | |
20 | #include "rsync.h" | |
21 | ||
0c515f17 AT |
22 | |
23 | /**************************************************************************** | |
24 | simple routine to do connection counting | |
25 | ****************************************************************************/ | |
26 | int claim_connection(char *fname,int max_connections) | |
27 | { | |
28 | int fd, i; | |
0c515f17 AT |
29 | |
30 | if (max_connections <= 0) | |
31 | return 1; | |
8d72ef6e | 32 | |
0c515f17 AT |
33 | fd = open(fname,O_RDWR|O_CREAT, 0600); |
34 | ||
35 | if (fd == -1) { | |
36 | return 0; | |
37 | } | |
38 | ||
0c515f17 AT |
39 | /* find a free spot */ |
40 | for (i=0;i<max_connections;i++) { | |
31593dd6 | 41 | if (lock_range(fd, i*4, 4)) return 1; |
0c515f17 AT |
42 | } |
43 | ||
8d72ef6e AT |
44 | /* only interested in open failures */ |
45 | errno = 0; | |
46 | ||
0c515f17 | 47 | close(fd); |
31593dd6 | 48 | return 0; |
0c515f17 | 49 | } |