From a4601ea2a8501273a149ac89889d54a9943b6e29 Mon Sep 17 00:00:00 2001
From: Doug MacEachern <dougm@hyperic.com>
Date: Mon, 21 Feb 2005 02:19:49 +0000
Subject: [PATCH] prevent hang if nfs server is down

---
 bindings/java/src/net/hyperic/sigar/cmd/Df.java | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/bindings/java/src/net/hyperic/sigar/cmd/Df.java b/bindings/java/src/net/hyperic/sigar/cmd/Df.java
index f6275d20..33264a7f 100644
--- a/bindings/java/src/net/hyperic/sigar/cmd/Df.java
+++ b/bindings/java/src/net/hyperic/sigar/cmd/Df.java
@@ -7,6 +7,7 @@ import net.hyperic.sigar.SigarException;
 import net.hyperic.sigar.FileSystem;
 import net.hyperic.sigar.FileSystemMap;
 import net.hyperic.sigar.FileSystemUsage;
+import net.hyperic.sigar.NfsFileSystem;
 
 import net.hyperic.sigar.shell.FileCompleter;
 import net.hyperic.sigar.util.GetlineCompleter;
@@ -91,8 +92,16 @@ public class Df extends SigarCommandBase {
         long used, avail, total, pct;
 
         try {
-            FileSystemUsage usage =
-                this.sigar.getFileSystemUsage(fs.getDirName());
+            FileSystemUsage usage;
+            if (fs instanceof NfsFileSystem) {
+                NfsFileSystem nfs = (NfsFileSystem)fs;
+                if (!nfs.ping()) {
+                    println(fs.getDevName() +
+                            " !!! nfs server is down !!!");
+                    return;
+                }
+            }
+            usage = this.sigar.getFileSystemUsage(fs.getDirName());
 
             used = usage.getTotal() - usage.getFree();
             avail = usage.getAvail();