HADOOP-9915. o.a.h.fs.Stat support on Mac OS X (Contributed by Binglin Chang)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1520192 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -46,6 +46,9 @@ Release 2.3.0 - UNRELEASED
     HADOOP-9889. Refresh the Krb5 configuration when creating a new kdc in
     Hadoop-MiniKDC (Wei Yan via Sandy Ryza)
 
+    HADOOP-9915.  o.a.h.fs.Stat support on Mac OS X  (Binglin Chang via Colin
+    Patrick McCabe)
+
   OPTIMIZATIONS
 
     HADOOP-9748. Reduce blocking on UGI.ensureInitialized (daryn)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/Stat.java

@@ -80,7 +80,7 @@ public class Stat extends Shell {
    * @return
    */
   public static boolean isAvailable() {
-    if (Shell.LINUX || Shell.FREEBSD) {
+    if (Shell.LINUX || Shell.FREEBSD || Shell.MAC) {
       return true;
     }
     return false;
@@ -100,7 +100,7 @@ public class Stat extends Shell {
     if (Shell.LINUX) {
       return new String[] {
           "stat", derefFlag + "c", "%s,%F,%Y,%X,%a,%U,%G,%N", path.toString() };
-    } else if (Shell.FREEBSD) {
+    } else if (Shell.FREEBSD || Shell.MAC) {
       return new String[] {
           "stat", derefFlag + "f", "%z,%HT,%m,%a,%Op,%Su,%Sg,`link' -> `%Y'",
           path.toString() };

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestStat.java

@@ -19,6 +19,7 @@ package org.apache.hadoop.fs;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.fail;
 
 import java.io.BufferedReader;
@@ -26,10 +27,11 @@ import java.io.FileNotFoundException;
 import java.io.StringReader;
 
 import org.apache.hadoop.conf.Configuration;
+import org.junit.Assume;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
-public class TestStat {
+public class TestStat extends FileSystemTestHelper {
 
   private static Stat stat;
 
@@ -113,6 +115,7 @@ public class TestStat {
 
   @Test(timeout=10000)
   public void testStatFileNotFound() throws Exception {
+    Assume.assumeTrue(Stat.isAvailable());
     try {
       stat.getFileStatus();
       fail("Expected FileNotFoundException");
@@ -125,4 +128,21 @@ public class TestStat {
   public void testStatEnvironment() throws Exception {
     assertEquals(stat.getEnvironment("LANG"), "C");
   }
+
+  @Test(timeout=10000)
+  public void testStat() throws Exception {
+    Assume.assumeTrue(Stat.isAvailable());
+    FileSystem fs = FileSystem.getLocal(new Configuration());
+    Path testDir = new Path(getTestRootPath(fs), "teststat");
+    fs.mkdirs(testDir);
+    Path sub1 = new Path(testDir, "sub1");
+    Path sub2 = new Path(testDir, "sub2");
+    fs.mkdirs(sub1);
+    fs.createSymlink(sub1, sub2, false);
+    FileStatus stat1 = new Stat(sub1, 4096l, false, fs).getFileStatus();
+    FileStatus stat2 = new Stat(sub2, 0, false, fs).getFileStatus();
+    assertTrue(stat1.isDirectory());
+    assertFalse(stat2.isDirectory());
+    fs.delete(testDir, true);
+  }
 }