From 0ec6cfb13b4d9ef14b90119cf662e47ed559a185 Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@nicira.com>
Date: Wed, 26 May 2010 10:07:22 -0700
Subject: socket-util: Tolerate missing RLIM_SAVED_CUR and RLIM_SAVED_MAX.

POSIX requires these macros, but FreeBSD 8.0 doesn't have them.
---
 lib/socket-util.c | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/lib/socket-util.c b/lib/socket-util.c
index 3af74a48..bf563eda 100644
--- a/lib/socket-util.c
+++ b/lib/socket-util.c
@@ -55,6 +55,28 @@ set_nonblocking(int fd)
     }
 }
 
+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. */
 int
 get_max_fds(void)
@@ -62,10 +84,7 @@ get_max_fds(void)
     static int max_fds = -1;
     if (max_fds < 0) {
         struct rlimit r;
-        if (!getrlimit(RLIMIT_NOFILE, &r)
-            && r.rlim_cur != RLIM_INFINITY
-            && r.rlim_cur != RLIM_SAVED_MAX
-            && r.rlim_cur != RLIM_SAVED_CUR) {
+        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");
-- 
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