components/visual-panels/core/src/java/util/com/oracle/solaris/vp/util/misc/ProcessUtil.java
changeset 827 0944d8c0158b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/visual-panels/core/src/java/util/com/oracle/solaris/vp/util/misc/ProcessUtil.java	Thu May 24 04:16:47 2012 -0400
@@ -0,0 +1,113 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
+ */
+
+package com.oracle.solaris.vp.util.misc;
+
+import java.io.*;
+import com.oracle.solaris.vp.util.misc.exception.CommandFailedException;
+
+public class ProcessUtil {
+    //
+    // Static methods
+    //
+
+    /**
+     * Runs the given command and waits for it to complete.
+     *
+     * @param	    command
+     *		    the command array
+     *
+     * @return	    the result of the command
+     *
+     * @exception   IOException
+     *		    if an I/O error occurs
+     *
+     * @exception   InterruptedException
+     *		    if the current thread is interrupted while
+     *		    waiting for the process to finish
+     */
+    public static ProcessResult exec(String... command) throws IOException,
+	InterruptedException {
+
+	Process p = Runtime.getRuntime().exec(command);
+	p.waitFor();
+
+	int exitValue = p.exitValue();
+	byte[] stdout = getBytes(p.getInputStream());
+	byte[] stderr = getBytes(p.getErrorStream());
+
+	return new ProcessResult(command, exitValue, stdout, stderr);
+    }
+
+    /**
+     * Runs the given command and waits for it to complete.
+     *
+     * @param	    expExitValue
+     *		    the expected exit value of the command
+     *
+     * @param	    command
+     *		    the command array
+     *
+     * @return	    the result of the command
+     *
+     * @exception   IOException
+     *		    if an I/O error occurs
+     *
+     * @exception   InterruptedException
+     *		    if the current thread is interrupted while
+     *		    waiting for the process to finish
+     *
+     * @exception   CommandFailedException
+     *		    if the command exits with a result other than {@code
+     *		    expExitValue}
+     */
+    public static ProcessResult exec(int expExitValue, String... command)
+	throws IOException, InterruptedException, CommandFailedException {
+
+	ProcessResult result = exec(command);
+	if (result.getExitValue() != expExitValue) {
+	    throw new CommandFailedException(result);
+	}
+
+	return result;
+    }
+
+    //
+    // Private static methods
+    //
+
+    private static byte[] getBytes(InputStream in) {
+	ByteArrayOutputStream out = new ByteArrayOutputStream();
+	byte[] b = new byte[1024];
+	int n;
+	try {
+	    while ((n = in.read(b)) != -1) {
+		out.write(b, 0, n);
+	    }
+	} catch (IOException unlikely) {
+	}
+	return out.toByteArray();
+    }
+}