Add "write" comment to content tool.

This gives developers an easy way to push temporary testing
configuration data into their apps.  We also now have symmetry with
the existing "read" command.

Test: builds, boots, example commands work
Bug: 64672411
Change-Id: I7bf6360915e1e4eb0d6ceaaec674f09931e28c6c

cmds/content/src/com/android/commands/content/Content.java

@@ -32,12 +32,10 @@ import android.os.Process;
 import android.os.UserHandle;
 import android.text.TextUtils;
 
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
+import libcore.io.Streams;
 
-import libcore.io.IoUtils;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 
 /**
  * This class is a command line utility for manipulating content. A client
@@ -122,13 +120,14 @@ public class Content {
                     + "\n"
                     + "usage: adb shell content read --uri <URI> [--user <USER_ID>]\n"
                     + "  Example:\n"
-                    + "  # cat default ringtone to a file, then pull to host\n"
-                    + "  adb shell 'content read --uri content://settings/system/ringtone >"
-                    + " /mnt/sdcard/tmp.ogg' && adb pull /mnt/sdcard/tmp.ogg\n"
+                    + "  adb shell 'content read --uri content://settings/system/ringtone_cache' > host.ogg\n"
+                    + "\n"
+                    + "usage: adb shell content write --uri <URI> [--user <USER_ID>]\n"
+                    + "  Example:\n"
+                    + "  adb shell 'content write --uri content://settings/system/ringtone_cache' < host.ogg\n"
                     + "\n"
                     + "usage: adb shell content gettype --uri <URI> [--user <USER_ID>]\n"
                     + "  Example:\n"
-                    + "  # Show the mime-type of the URI\n"
                     + "  adb shell content gettype --uri content://media/internal/audio/media/\n"
                     + "\n";
 
@@ -139,6 +138,7 @@ public class Content {
         private static final String ARGUMENT_QUERY = "query";
         private static final String ARGUMENT_CALL = "call";
         private static final String ARGUMENT_READ = "read";
+        private static final String ARGUMENT_WRITE = "write";
         private static final String ARGUMENT_GET_TYPE = "gettype";
         private static final String ARGUMENT_WHERE = "--where";
         private static final String ARGUMENT_BIND = "--bind";
@@ -179,6 +179,8 @@ public class Content {
                     return parseCallCommand();
                 } else if (ARGUMENT_READ.equals(operation)) {
                     return parseReadCommand();
+                } else if (ARGUMENT_WRITE.equals(operation)) {
+                    return parseWriteCommand();
                 } else if (ARGUMENT_GET_TYPE.equals(operation)) {
                     return parseGetTypeCommand();
                 } else {
@@ -339,6 +341,25 @@ public class Content {
             return new ReadCommand(uri, userId);
         }
 
+        private WriteCommand parseWriteCommand() {
+            Uri uri = null;
+            int userId = UserHandle.USER_SYSTEM;
+            for (String argument; (argument = mTokenizer.nextArg())!= null;) {
+                if (ARGUMENT_URI.equals(argument)) {
+                    uri = Uri.parse(argumentValueRequired(argument));
+                } else if (ARGUMENT_USER.equals(argument)) {
+                    userId = Integer.parseInt(argumentValueRequired(argument));
+                } else {
+                    throw new IllegalArgumentException("Unsupported argument: " + argument);
+                }
+            }
+            if (uri == null) {
+                throw new IllegalArgumentException("Content provider URI not specified."
+                        + " Did you specify --uri argument?");
+            }
+            return new WriteCommand(uri, userId);
+        }
+
         public QueryCommand parseQueryCommand() {
             Uri uri = null;
             int userId = UserHandle.USER_SYSTEM;
@@ -561,20 +582,21 @@ public class Content {
 
         @Override
         public void onExecute(IContentProvider provider) throws Exception {
-            final ParcelFileDescriptor fd = provider.openFile(null, mUri, "r", null, null);
-            copy(new FileInputStream(fd.getFileDescriptor()), System.out);
+            try (ParcelFileDescriptor fd = provider.openFile(null, mUri, "r", null, null)) {
+                Streams.copy(new FileInputStream(fd.getFileDescriptor()), System.out);
+            }
         }
+    }
 
-        private static void copy(InputStream is, OutputStream os) throws IOException {
-            final byte[] buffer = new byte[8 * 1024];
-            int read;
-            try {
-                while ((read = is.read(buffer)) > -1) {
-                    os.write(buffer, 0, read);
-                }
-            } finally {
-                IoUtils.closeQuietly(is);
-                IoUtils.closeQuietly(os);
+    private static class WriteCommand extends Command {
+        public WriteCommand(Uri uri, int userId) {
+            super(uri, userId);
+        }
+
+        @Override
+        public void onExecute(IContentProvider provider) throws Exception {
+            try (ParcelFileDescriptor fd = provider.openFile(null, mUri, "w", null, null)) {
+                Streams.copy(System.in, new FileOutputStream(fd.getFileDescriptor()));
             }
         }
     }