| | 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 |
| | 7 | * it under the terms of the GNU General Public License version 3 as |
| | 8 | * published by the Free Software Foundation. |
| | 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 | * |
| | 15 | * You should have received a copy of the GNU General Public License along |
| | 16 | * with this program; if not, visit the http://fsf.org website. |
| | 17 | */ |
| | 18 | |
| | 19 | #include "rsync.h" |
| | 20 | |
| | 21 | /**************************************************************************** |
| | 22 | simple routine to do connection counting |
| | 23 | ****************************************************************************/ |
| | 24 | int claim_connection(char *fname,int max_connections) |
| | 25 | { |
| | 26 | int fd, i; |
| | 27 | |
| | 28 | if (max_connections <= 0) |
| | 29 | return 1; |
| | 30 | |
| | 31 | fd = open(fname,O_RDWR|O_CREAT, 0600); |
| | 32 | |
| | 33 | if (fd == -1) { |
| | 34 | return 0; |
| | 35 | } |
| | 36 | |
| | 37 | /* find a free spot */ |
| | 38 | for (i=0;i<max_connections;i++) { |
| | 39 | if (lock_range(fd, i*4, 4)) return 1; |
| | 40 | } |
| | 41 | |
| | 42 | /* only interested in open failures */ |
| | 43 | errno = 0; |
| | 44 | |
| | 45 | close(fd); |
| | 46 | return 0; |
| | 47 | } |
Matt McCutchen's Web Site / rsync / rsync.git / blame_incremental