diff --git a/bucklets/onos.bucklet b/bucklets/onos.bucklet
index 9c1ae9f..7a2f1a9 100644
--- a/bucklets/onos.bucklet
+++ b/bucklets/onos.bucklet
@@ -110,39 +110,29 @@
 
   ### Checkstyle
   if srcs:
-    chk_cmd = '#!/bin/bash\n'
     base = get_base_path()
-    chk_cmd += 'OUT=$3\n'
-    chk_cmd += ' '.join(( 'java -jar $1',
-                          '-c $2',
-                          ' '.join(['%s/%s' % (base, s) for s in srcs]) ))
-    chk_cmd += ' | tee $OUT'
-    chk_cmd += ' | grep -E "^.*[0-9]+:[0-9]+: error:"'
-    chk_cmd += ' | sed "s#^.*%s/#%s:#g"\n' % (base, name)
-    chk_cmd += 'RESULT=(${PIPESTATUS[*]})\n' # RESULT[0] is checkstyle result, RESULT[2] is grep
-    chk_cmd += 'test ${RESULT[2]} -eq 0 || cat $OUT\n'
-    chk_cmd += 'rm $OUT\n'
-    chk_cmd += 'exit ${RESULT[0]}'
+    files = base + '\n' + '\n'.join(['%s/%s' % (base, s) for s in srcs])
 
     genrule(
-      name = name + '-checkstyle-sh',
-      bash = "echo '%s' > $OUT && chmod +x $OUT" % chk_cmd,
+      name = name + '-checkstyle-files',
+      bash = "echo '%s' > $OUT" % files,
       srcs = srcs,
-      out = 'checkstyle.sh',
+      out = 'checkstyle-files.txt',
     )
 
     sh_test(
       name = name + '-checkstyle',
-      test = ':' + name + '-checkstyle-sh',
-      args = [
-               '$(location //lib:checkstyle)',
-               '$(location //tools/build/conf:checkstyle-xml)',
-               '`mktemp /tmp/%s-checkstyle-XXXXXX`' % name,
-             ],
+      test = '//tools/build/conf:start-checkstyle',
       deps = [
                ':'+ bare_jar_name,
-               '//tools/build/conf:suppressions-xml',
              ],
+      args = [
+                '$(location //tools/build/conf:checkstyle-jar)',
+                '$(location :' + name + '-checkstyle-files)',
+                '$(location //tools/build/conf:checkstyle-xml)',
+                '$(location //tools/build/conf:suppressions-xml)',
+             ],
+      test_rule_timeout_ms = 20000,
       labels = [ 'checkstyle' ],
     )
   else:
@@ -219,4 +209,6 @@
     resources = test_resources,
     resources_root = test_resources_root,
     visibility = visibility
-    )
+  )
+
+  #FIXME need to run checkstyle on test sources
\ No newline at end of file
diff --git a/lib/BUCK b/lib/BUCK
index db38e47..1103cfe 100644
--- a/lib/BUCK
+++ b/lib/BUCK
@@ -1,4 +1,4 @@
-# ***** This file was auto-generated at Wed May 18 14:26:50 PDT 2016. Do not edit this file manually. *****
+# ***** This file was auto-generated at Wed May 18 17:55:44 PDT 2016. Do not edit this file manually. *****
 osgi_feature_group(
   name = 'COMPILE',
   visibility = ['PUBLIC'],
@@ -321,6 +321,15 @@
 )
 
 remote_jar (
+  name = 'commons-beanutils',
+  out = 'commons-beanutils-1.9.2.jar',
+  url = 'mvn:commons-beanutils:commons-beanutils:jar:1.9.2',
+  sha1 = '7a87d845ad3a155297e8f67d9008f4c1e5656b71',
+  maven_coords = 'commons-beanutils:commons-beanutils:1.9.2',
+  visibility = [ 'PUBLIC' ],
+)
+
+remote_jar (
   name = 'concurrent-trees',
   out = 'concurrent-trees-2.4.0.jar',
   url = 'mvn:com.googlecode.concurrent-trees:concurrent-trees:jar:2.4.0',
@@ -420,6 +429,15 @@
 )
 
 remote_jar (
+  name = 'antlr',
+  out = 'antlr-2.7.7.jar',
+  url = 'mvn:antlr:antlr:jar:2.7.7',
+  sha1 = '83cd2cd674a217ade95a4bb83a8a14f351f48bd0',
+  maven_coords = 'antlr:antlr:jar:NON-OSGI:2.7.7',
+  visibility = [ 'PUBLIC' ],
+)
+
+remote_jar (
   name = 'error_prone_annotations',
   out = 'error_prone_annotations-2.0.2.jar',
   url = 'mvn:com.google.errorprone:error_prone_annotations:jar:2.0.2',
@@ -1114,9 +1132,10 @@
 
 remote_jar (
   name = 'checkstyle',
-  out = 'checkstyle-6.11.2-all.jar',
-  url = 'http://onlab.vicci.org/onos/third-party/checkstyle-6.11.2-all.jar',
-  sha1 = 'f504187b1743e73ffe72c2eede0ff57d45536b7d',
+  out = 'checkstyle-6.11.2.jar',
+  url = 'mvn:com.puppycrawl.tools:checkstyle:jar:6.11.2',
+  sha1 = '2705f014697ac0219de0bb2bfc33afb7ec6d22c6',
+  maven_coords = 'com.puppycrawl.tools:checkstyle:jar:NON-OSGI:6.11.2',
   visibility = [ 'PUBLIC' ],
 )
 
diff --git a/lib/deps.json b/lib/deps.json
index 62ea79c..d25082f 100644
--- a/lib/deps.json
+++ b/lib/deps.json
@@ -98,6 +98,7 @@
     "catalyst-local": "mvn:io.atomix.catalyst:catalyst-local:1.0.4",
     "catalyst-serializer": "mvn:io.atomix.catalyst:catalyst-serializer:1.0.4",
     "catalyst-transport": "mvn:io.atomix.catalyst:catalyst-transport:1.0.4",
+    "catalyst-transport": "mvn:io.atomix.catalyst:catalyst-transport:1.0.4",
     "commons-codec": "mvn:commons-codec:commons-codec:1.10",
     "commons-collections": "mvn:commons-collections:commons-collections:3.2.2",
     "commons-configuration": "mvn:commons-configuration:commons-configuration:1.10",
@@ -107,6 +108,7 @@
     "commons-logging": "mvn:commons-logging:commons-logging:1.1.1",
     "commons-math3": "mvn:org.apache.commons:commons-math3:3.6.1",
     "commons-pool": "mvn:commons-pool:commons-pool:1.6",
+    "commons-beanutils": "mvn:commons-beanutils:commons-beanutils:1.9.2",
     "concurrent-trees": "mvn:com.googlecode.concurrent-trees:concurrent-trees:2.4.0",
     "copycat-api": "mvn:org.onosproject:copycat-api:0.5.1.onos",
     "copycat-client": "mvn:io.atomix.copycat:copycat-client:1.0.0-rc4",
@@ -118,6 +120,7 @@
     "copycat-state-log": "mvn:org.onosproject:copycat-state-log:0.5.1.onos",
     "copycat-state-machine": "mvn:org.onosproject:copycat-state-machine:0.5.1.onos",
     "easymock": "mvn:org.easymock:easymock:3.4",
+    "antlr": "mvn:antlr:antlr:2.7.7",
     "error_prone_annotations": "mvn:com.google.errorprone:error_prone_annotations:2.0.2",
     "ganymed-ssh2": "mvn:ch.ethz.ganymed:ganymed-ssh2:262",
     "jersey-container-jetty-http": "mvn:org.glassfish.jersey.containers:jersey-container-jetty-http:2.22.2",
@@ -198,7 +201,7 @@
     "slf4j-jdk14": "mvn:org.slf4j:slf4j-jdk14:1.7.21",
     "typesafe-config": "mvn:com.typesafe:config:1.2.1",
     "validation-api": "mvn:javax.validation:validation-api:1.1.0.Final",
-    "checkstyle": "http://onlab.vicci.org/onos/third-party/checkstyle-6.11.2-all.jar",
+    "checkstyle": "mvn:com.puppycrawl.tools:checkstyle:6.11.2",
     "apache-karaf": "http://onlab.vicci.org/onos/third-party/apache-karaf-3.0.5.tar.gz",
     "bndlib": "mvn:biz.aQute.bnd:biz.aQute.bndlib:jar:3.1.0",
     "org.apache.felix.scr.bnd": {
diff --git a/tools/build/conf/BUCK b/tools/build/conf/BUCK
index 35f9b85..3b9516c 100644
--- a/tools/build/conf/BUCK
+++ b/tools/build/conf/BUCK
@@ -1,22 +1,68 @@
 checkstyle_source = 'src/main/resources/onos/checkstyle.xml'
 suppression_source = 'src/main/resources/onos/suppressions.xml'
 
-xml = ('<module name="SuppressionFilter">'
-       '<property name="file" value="$(location :suppressions-xml)"/>'
-       '</module>' )
-cmd = "sed 's#<module name=\"Checker\">#<module name=\"Checker\">%s#' %s > $OUT" % ( xml, checkstyle_source )
-
-genrule(
+export_file (
   name = 'checkstyle-xml',
-  srcs = [ checkstyle_source ],
-  out = 'checkstyle.xml',
-  bash = cmd,
-  visibility = [ 'PUBLIC' ]
+  src = checkstyle_source,
+  visibility = [ 'PUBLIC' ],
 )
 
-#FIXME location suppression.xml does not trigger this rule
-export_file(
+export_file (
   name = 'suppressions-xml',
   src = suppression_source,
-  visibility = [ 'PUBLIC' ]
+  visibility = [ 'PUBLIC' ],
 )
+
+export_file (
+  name = 'start-checkstyle',
+  visibility = [ 'PUBLIC' ],
+)
+
+COMPILE = [
+  '//lib:guava',
+  '//lib:checkstyle',
+]
+
+RUN = [
+  '//lib:commons-logging',
+  '//lib:commons-beanutils',
+  '//lib:commons-lang3',
+  '//lib:commons-collections',
+  '//lib:antlr',
+]
+
+java_library (
+  name = 'checkstyle',
+  srcs = glob([ 'src/main/java/**/*.java' ]),
+  deps = COMPILE,
+)
+
+java_binary (
+  name = 'checkstyle-jar',
+  deps = [ ':checkstyle' ] + RUN,
+  main_class = 'org.onosproject.checkstyle.Main',
+  blacklist = [ 'META-INF/.*' ],
+  visibility = [ 'PUBLIC' ],
+)
+
+# cmd = '#!/bin/bash\n'
+# cmd += '$1 &>/dev/null < /dev/null &'
+#
+# genrule(
+#   name = 'checkstyle-sh',
+#   bash = "echo '%s' > $OUT && chmod +x $OUT" % cmd,
+#   out = 'checkstyle.sh',
+# )
+#
+# sh_test(
+#   name = 'checkstyle-runner',
+#   test = ':checkstyle-sh',
+#   args = [
+#   '$(exe :checkstyle-jar)',
+#   '$(location //lib:checkstyle)',
+#   '$(location //tools/build/conf:checkstyle-xml)',
+#   '`mktemp /tmp/%s-checkstyle-XXXXXX`',
+#   ],
+#   labels = [ 'checkstyle' ],
+#   visibility = [ 'PUBLIC' ],
+# )
\ No newline at end of file
diff --git a/tools/build/conf/pom.xml b/tools/build/conf/pom.xml
index 85c60f7..0d606d2 100644
--- a/tools/build/conf/pom.xml
+++ b/tools/build/conf/pom.xml
@@ -34,5 +34,29 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
+    <dependencies>
+        <dependency>
+            <groupId>com.puppycrawl.tools</groupId>
+            <artifactId>checkstyle</artifactId>
+            <version>6.11.2</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <!-- TODO: update once following issue is fixed. -->
+                <!-- https://jira.codehaus.org/browse/MCOMPILER-205 -->
+                <version>2.5.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>
 
diff --git a/tools/build/conf/src/main/java/org/onosproject/checkstyle/CheckstyleRunner.java b/tools/build/conf/src/main/java/org/onosproject/checkstyle/CheckstyleRunner.java
new file mode 100644
index 0000000..1768e16
--- /dev/null
+++ b/tools/build/conf/src/main/java/org/onosproject/checkstyle/CheckstyleRunner.java
@@ -0,0 +1,178 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.checkstyle;
+
+import com.google.common.io.ByteStreams;
+import com.puppycrawl.tools.checkstyle.Checker;
+import com.puppycrawl.tools.checkstyle.ConfigurationLoader;
+import com.puppycrawl.tools.checkstyle.DefaultConfiguration;
+import com.puppycrawl.tools.checkstyle.PropertiesExpander;
+import com.puppycrawl.tools.checkstyle.api.AuditEvent;
+import com.puppycrawl.tools.checkstyle.api.AuditListener;
+import com.puppycrawl.tools.checkstyle.api.CheckstyleException;
+import com.puppycrawl.tools.checkstyle.api.Configuration;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.Socket;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class CheckstyleRunner {
+
+    private final Configuration config;
+
+    public CheckstyleRunner(String configLocation, String suppressionLocation)
+            throws CheckstyleException {
+        // create a configuration
+        DefaultConfiguration config = (DefaultConfiguration) ConfigurationLoader.loadConfiguration(
+                configLocation, new PropertiesExpander(System.getProperties()));
+
+        // add the suppression file to the configuration
+        DefaultConfiguration suppressions = new DefaultConfiguration("SuppressionFilter");
+        suppressions.addAttribute("file", suppressionLocation);
+        config.addChild(suppressions);
+
+        this.config = config;
+    }
+
+    public Runnable checkClass(Socket socket) {
+        return () -> {
+            try {
+                String input = new String(ByteStreams.toByteArray(socket.getInputStream()));
+                String output = checkClass(input);
+                socket.getOutputStream().write(output.getBytes());
+                socket.getOutputStream().flush();
+                socket.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            } catch (CheckstyleException e) {
+                e.printStackTrace();
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+        };
+    }
+
+    public String checkClass(String input) throws CheckstyleException, InterruptedException {
+        String[] split = input.split("\n", 2);
+        if (split.length < 2 || split[1].length() == 0) {
+            return "";
+        }
+        String base = split[0];
+        String files = split[1];
+
+        // create a listener for output
+        StringAuditor listener = new StringAuditor();
+        listener.setBase(base);
+
+        // create Checker object and run it
+        final Checker checker = new Checker();
+        final ClassLoader moduleClassLoader = Checker.class.getClassLoader();
+        checker.setModuleClassLoader(moduleClassLoader);
+
+        try {
+
+            checker.configure(config);
+            checker.addListener(listener);
+
+            // run Checker
+            List<File> fileList = Stream.of(files.split("\n"))
+                                        .map(File::new)
+                                        .collect(Collectors.toList());
+            int errorCounter = checker.process(fileList);
+            if (errorCounter > 0) {
+                listener.append("CHECKSTYLE ERROR\n");
+            }
+        } finally {
+            checker.destroy();
+        }
+
+        return listener.getAudit();
+    }
+}
+
+class StringAuditor implements AuditListener {
+
+    private CountDownLatch finishedLatch = new CountDownLatch(1);
+    private StringBuilder output = new StringBuilder();
+    private String base = "";
+
+    public void setBase(String base) {
+        this.base = base;
+    }
+
+    public void append(String s) {
+        output.append(s);
+    }
+
+    public String getAudit() throws InterruptedException {
+        finishedLatch.await();
+        return output.toString();
+    }
+
+    @Override
+    public void auditStarted(AuditEvent evt) {
+
+    }
+
+    @Override
+    public void auditFinished(AuditEvent evt) {
+        finishedLatch.countDown();
+    }
+
+    @Override
+    public void fileStarted(AuditEvent evt) {
+
+    }
+
+    @Override
+    public void fileFinished(AuditEvent evt) {
+
+    }
+
+    @Override
+    public void addError(AuditEvent evt) {
+        switch (evt.getSeverityLevel()) {
+            case ERROR:
+                String fileName = evt.getFileName();
+                int index = fileName.indexOf(base);
+                if (index >= 0) {
+                    fileName = fileName.substring(index + base.length() + 1);
+                }
+                output.append(fileName).append(':').append(evt.getLine());
+                if (evt.getColumn() > 0) {
+                    output.append(':').append(evt.getColumn());
+                }
+                output.append(": ").append(evt.getMessage());
+                output.append('\n');
+                break;
+            case IGNORE:
+            case INFO:
+            case WARNING:
+            default:
+                break;
+        }
+    }
+
+    @Override
+    public void addException(AuditEvent evt, Throwable throwable) {
+        addError(evt);
+        output.append(throwable.getMessage());
+    }
+}
\ No newline at end of file
diff --git a/tools/build/conf/src/main/java/org/onosproject/checkstyle/Main.java b/tools/build/conf/src/main/java/org/onosproject/checkstyle/Main.java
new file mode 100644
index 0000000..99c5d3c
--- /dev/null
+++ b/tools/build/conf/src/main/java/org/onosproject/checkstyle/Main.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.checkstyle;
+
+import com.puppycrawl.tools.checkstyle.api.CheckstyleException;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.FileLock;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+import static java.nio.file.StandardOpenOption.*;
+
+/**
+ * Main program for executing scenario test warden.
+ */
+public final class Main {
+
+    private static long POLLING_INTERVAL = 1000; //ms
+
+    // Public construction forbidden
+    private Main(String[] args) {
+    }
+
+    /**
+     * Main entry point for the cell warden.
+     *
+     * @param args command-line arguments
+     */
+    public static void main(String[] args)
+            throws CheckstyleException, IOException {
+        startServer(args);
+    }
+
+    // Monitors another PID and exit when that process exits
+    private static void watchProcess(String pid) {
+        if (pid == null || pid.equals("0")) {
+            return;
+        }
+        Timer timer = new Timer(true); // start as a daemon, so we don't hang shutdown
+        timer.scheduleAtFixedRate(new TimerTask() {
+            private String cmd = "kill -s 0 " + pid;
+            @Override
+            public void run() {
+                try {
+                    Process p = Runtime.getRuntime().exec(cmd);
+                    p.waitFor();
+                    if (p.exitValue() != 0) {
+                        System.err.println("shutting down...");
+                        System.exit(0);
+                    }
+                } catch (IOException | InterruptedException e) {
+                    //no-op
+                    e.printStackTrace();
+                }
+            }
+        }, POLLING_INTERVAL, POLLING_INTERVAL);
+    }
+
+    // Initiates a server.
+    private static void startServer(String[] args) throws IOException, CheckstyleException {
+        String portLock = args[0];
+        String buckPid = args[1];
+        String checkstyleFile = args[2];
+        String suppressionsFile = args[3];
+
+        // Use a file lock to ensure only one copy of the daemon runs
+        Path portLockPath = Paths.get(portLock);
+        FileChannel channel = FileChannel.open(portLockPath, WRITE, CREATE);
+        FileLock lock = channel.tryLock();
+        if (lock == null) {
+            System.out.println("Server is already running");
+            System.exit(1);
+        } //else, hold the lock until the JVM exits
+
+        // Start the server and bind it to a random port
+        ServerSocket server = new ServerSocket(0);
+
+        // Monitor the parent buck process
+        watchProcess(buckPid);
+
+        // Set up hook to clean up after ourselves
+        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
+            try {
+                if (channel != null) {
+                    channel.truncate(0);
+                    channel.close();
+                }
+                System.err.println("tear down...");
+                Files.delete(portLockPath);
+            } catch (IOException e) {
+                //no-op: shutting down
+                e.printStackTrace();
+            }
+        }));
+
+        // Write the bound port to the port file
+        int port = server.getLocalPort();
+        channel.truncate(0);
+        channel.write(ByteBuffer.wrap(Integer.toString(port).getBytes()));
+
+        // Instantiate a Checkstyle runner and executor; serve until exit...
+        CheckstyleRunner runner = new CheckstyleRunner(checkstyleFile, suppressionsFile);
+        ExecutorService executor = Executors.newCachedThreadPool();
+        while (true) {
+            try {
+                executor.submit(runner.checkClass(server.accept()));
+            } catch (Exception e) {
+                e.printStackTrace();
+                //no-op
+            }
+        }
+    }
+}
diff --git a/tools/build/conf/start-checkstyle b/tools/build/conf/start-checkstyle
new file mode 100755
index 0000000..764f7d9
--- /dev/null
+++ b/tools/build/conf/start-checkstyle
@@ -0,0 +1,74 @@
+#!/bin/bash
+CHECKSTYLE=$1
+FILES=$2
+CONFIG=$3
+SUPPRESSIONS=$4
+
+PORT_FILE="$1.port"
+
+function ppid() {
+    ps -p ${1:-$$} -o ppid= -o pid= -o comm=
+}
+
+function buck_pid() {
+    BUCK_PID=($(ppid))
+    while [ ${BUCK_PID[0]} -ne 0 ]; do
+        BUCK_PID=($(ppid $BUCK_PID))
+        if [ "${BUCK_PID[2]}" == "buck" ]; then
+            # use parent PID of buck
+            echo ${BUCK_PID[0]}
+            return
+        fi
+        if [ "${BUCK_PID[2]}" == "buckd" ] ||
+           [[ "${BUCK_PID[2]}" == *"python"* ]]; then
+            # use PID of buckd or python
+            echo ${BUCK_PID[1]}
+            return
+        fi
+    done
+    # fallback last read PID
+    echo ${BUCK_PID[1]}
+}
+
+function port() {
+    cat $PORT_FILE 2>/dev/null || echo 0
+}
+
+function check_socket() {
+    nc localhost $(port) < /dev/null 2>/dev/null
+    return $?
+}
+
+# check to see if checkstyle daemon is running; if not, start it
+if ! check_socket; then
+    # Starting checkstyle server...
+    #FIXME change to /dev/null if/when we are confident
+    nohup java -jar $CHECKSTYLE $PORT_FILE $(buck_pid) $3 $4 >>/tmp/checkstyle.daemon 2>&1 &
+
+    TRIES=20
+    i=0
+    # Wait for checkstyle server to start for 2 seconds
+    while [ $i -lt $TRIES ]; do
+        if check_socket; then
+            CONNECTED=true
+            break
+        fi
+        let i=i+1
+        sleep 0.1
+    done
+    if [ -z "$CONNECTED" ]; then
+        echo "Failed to start checkstyle server"
+        exit 3
+    fi
+fi
+
+# run the actual checkstyle client
+OUT=$(cat $FILES | nc localhost $(port))
+if [ $? -ne 0 ]; then
+    echo "Error connecting to checkstyle server"
+    exit 2
+fi
+if [ -n "$OUT" ]; then
+    printf "$OUT"
+    exit 1
+fi
\ No newline at end of file