Merge "Expose statfs() through IMediaContainerService."

Author: jsharkey

core/java/com/android/internal/app/IMediaContainerService.aidl

@@ -32,4 +32,6 @@ interface IMediaContainerService {
     boolean checkExternalFreeStorage(in Uri fileUri);
     ObbInfo getObbInfo(in String filename);
     long calculateDirectorySize(in String directory);
+    /** Return file system stats: [0] is total bytes, [1] is available bytes */
+    long[] getFileSystemStats(in String path);
 }

packages/DefaultContainerService/src/com/android/defcontainer/DefaultContainerService.java

@@ -50,6 +50,10 @@
 import java.io.InputStream;
 import java.io.OutputStream;
 
+import libcore.io.ErrnoException;
+import libcore.io.Libcore;
+import libcore.io.StructStatFs;
+
 /*
  * This service copies a downloaded apk to a file passed in as
  * a ParcelFileDescriptor or to a newly created container specified
@@ -203,6 +207,18 @@ public long calculateDirectorySize(String path) throws RemoteException {
                 return 0L;
             }
         }
+
+        @Override
+        public long[] getFileSystemStats(String path) {
+            try {
+                final StructStatFs stat = Libcore.os.statfs(path);
+                final long totalSize = stat.f_blocks * stat.f_bsize;
+                final long availSize = stat.f_bavail * stat.f_bsize;
+                return new long[] { totalSize, availSize };
+            } catch (ErrnoException e) {
+                throw new IllegalStateException(e);
+            }
+        }
     };
 
     public DefaultContainerService() {