* Copyright (C) 1998 Andrew Tridgell
*
* This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 3 as
- * published by the Free Software Foundation.
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 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
#include "rsync.h"
-/****************************************************************************
-simple routine to do connection counting
-****************************************************************************/
-int claim_connection(char *fname,int max_connections)
+/* A simple routine to do connection counting. This returns 1 on success
+ * and 0 on failure, with errno also being set if the open() failed (errno
+ * will be 0 if the lock request failed). */
+int claim_connection(char *fname, int max_connections)
{
int fd, i;
- if (max_connections <= 0)
+ if (max_connections == 0)
return 1;
- fd = open(fname,O_RDWR|O_CREAT, 0600);
-
- if (fd == -1) {
+ if ((fd = open(fname, O_RDWR|O_CREAT, 0600)) < 0)
return 0;
- }
- /* find a free spot */
- for (i=0;i<max_connections;i++) {
- if (lock_range(fd, i*4, 4)) return 1;
+ /* 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);
+
+ /* A lock failure needs to return an errno of 0. */
+ errno = 0;
return 0;
}