| /* |
| * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.lang; |
| |
| import java.io.IOException; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.lang.ProcessBuilder.Redirect; |
| import java.lang.ProcessBuilder.Redirect; |
| |
| /** |
| * This class is for the exclusive use of ProcessBuilder.start() to |
| * create new processes. |
| * |
| * @author Martin Buchholz |
| * @since 1.5 |
| */ |
| final class ProcessImpl { |
| private static final sun.misc.JavaIOFileDescriptorAccess fdAccess |
| = sun.misc.SharedSecrets.getJavaIOFileDescriptorAccess(); |
| |
| private ProcessImpl() {} // Not instantiable |
| |
| private static byte[] toCString(String s) { |
| if (s == null) |
| return null; |
| byte[] bytes = s.getBytes(); |
| byte[] result = new byte[bytes.length + 1]; |
| System.arraycopy(bytes, 0, |
| result, 0, |
| bytes.length); |
| result[result.length-1] = (byte)0; |
| return result; |
| } |
| |
| // Only for use by ProcessBuilder.start() |
| static Process start(String[] cmdarray, |
| java.util.Map<String,String> environment, |
| String dir, |
| ProcessBuilder.Redirect[] redirects, |
| boolean redirectErrorStream) |
| throws IOException |
| { |
| assert cmdarray != null && cmdarray.length > 0; |
| |
| // Convert arguments to a contiguous block; it's easier to do |
| // memory management in Java than in C. |
| byte[][] args = new byte[cmdarray.length-1][]; |
| int size = args.length; // For added NUL bytes |
| for (int i = 0; i < args.length; i++) { |
| args[i] = cmdarray[i+1].getBytes(); |
| size += args[i].length; |
| } |
| byte[] argBlock = new byte[size]; |
| int i = 0; |
| for (byte[] arg : args) { |
| System.arraycopy(arg, 0, argBlock, i, arg.length); |
| i += arg.length + 1; |
| // No need to write NUL bytes explicitly |
| } |
| |
| int[] envc = new int[1]; |
| byte[] envBlock = ProcessEnvironment.toEnvironmentBlock(environment, envc); |
| |
| int[] std_fds; |
| |
| FileInputStream f0 = null; |
| FileOutputStream f1 = null; |
| FileOutputStream f2 = null; |
| |
| try { |
| if (redirects == null) { |
| std_fds = new int[] { -1, -1, -1 }; |
| } else { |
| std_fds = new int[3]; |
| |
| if (redirects[0] == Redirect.PIPE) |
| std_fds[0] = -1; |
| else if (redirects[0] == Redirect.INHERIT) |
| std_fds[0] = 0; |
| else { |
| f0 = new FileInputStream(redirects[0].file()); |
| std_fds[0] = fdAccess.get(f0.getFD()); |
| } |
| |
| if (redirects[1] == Redirect.PIPE) |
| std_fds[1] = -1; |
| else if (redirects[1] == Redirect.INHERIT) |
| std_fds[1] = 1; |
| else { |
| f1 = new FileOutputStream(redirects[1].file(), |
| redirects[1].append()); |
| std_fds[1] = fdAccess.get(f1.getFD()); |
| } |
| |
| if (redirects[2] == Redirect.PIPE) |
| std_fds[2] = -1; |
| else if (redirects[2] == Redirect.INHERIT) |
| std_fds[2] = 2; |
| else { |
| f2 = new FileOutputStream(redirects[2].file(), |
| redirects[2].append()); |
| std_fds[2] = fdAccess.get(f2.getFD()); |
| } |
| } |
| |
| return new UNIXProcess |
| (toCString(cmdarray[0]), |
| argBlock, args.length, |
| envBlock, envc[0], |
| toCString(dir), |
| std_fds, |
| redirectErrorStream); |
| } finally { |
| // In theory, close() can throw IOException |
| // (although it is rather unlikely to happen here) |
| try { if (f0 != null) f0.close(); } |
| finally { |
| try { if (f1 != null) f1.close(); } |
| finally { if (f2 != null) f2.close(); } |
| } |
| } |
| } |
| } |