Commit | Line | Data |
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0f78b815 WD |
1 | /* |
2 | * Support the max connections option. | |
3 | * | |
4 | * Copyright (C) 1998 Andrew Tridgell | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
ba2133d6 WD |
7 | * it under the terms of the GNU General Public License version 2 as |
8 | * published by the Free Software Foundation. | |
0f78b815 WD |
9 | * |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
e7c67065 WD |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. | |
0f78b815 | 18 | */ |
0c515f17 | 19 | |
0f78b815 | 20 | #include "rsync.h" |
0c515f17 AT |
21 | |
22 | /**************************************************************************** | |
23 | simple routine to do connection counting | |
24 | ****************************************************************************/ | |
25 | int claim_connection(char *fname,int max_connections) | |
26 | { | |
27 | int fd, i; | |
0c515f17 AT |
28 | |
29 | if (max_connections <= 0) | |
30 | return 1; | |
8d72ef6e | 31 | |
0c515f17 AT |
32 | fd = open(fname,O_RDWR|O_CREAT, 0600); |
33 | ||
34 | if (fd == -1) { | |
35 | return 0; | |
36 | } | |
37 | ||
0c515f17 AT |
38 | /* find a free spot */ |
39 | for (i=0;i<max_connections;i++) { | |
31593dd6 | 40 | if (lock_range(fd, i*4, 4)) return 1; |
0f78b815 | 41 | } |
0c515f17 | 42 | |
8d72ef6e AT |
43 | /* only interested in open failures */ |
44 | errno = 0; | |
45 | ||
0c515f17 | 46 | close(fd); |
31593dd6 | 47 | return 0; |
0c515f17 | 48 | } |