+#ifndef _WIN32
+static bool
+rlim_is_finite(rlim_t limit)
+{
+ if (limit == RLIM_INFINITY) {
+ return false;
+ }
+
+#ifdef RLIM_SAVED_CUR /* FreeBSD 8.0 lacks RLIM_SAVED_CUR. */
+ if (limit == RLIM_SAVED_CUR) {
+ return false;
+ }
+#endif
+
+#ifdef RLIM_SAVED_MAX /* FreeBSD 8.0 lacks RLIM_SAVED_MAX. */
+ if (limit == RLIM_SAVED_MAX) {
+ return false;
+ }
+#endif
+
+ return true;
+}
+
+/* Returns the maximum valid FD value, plus 1. */
+static int
+get_max_fds(void)
+{
+ static int max_fds;
+
+ if (!max_fds) {
+ struct rlimit r;
+ if (!getrlimit(RLIMIT_NOFILE, &r) && rlim_is_finite(r.rlim_cur)) {
+ max_fds = r.rlim_cur;
+ } else {
+ VLOG_WARN("failed to obtain fd limit, defaulting to 1024");
+ max_fds = 1024;
+ }
+ }
+
+ return max_fds;
+}
+#endif /* _WIN32 */
+