1 /* 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package java.lang; 27 28 import java.io.IOException; 29 import java.io.FileInputStream; 30 import java.io.FileOutputStream; 31 import java.lang.ProcessBuilder.Redirect; 32 import java.lang.ProcessBuilder.Redirect; 33 34 /** 35 * This class is for the exclusive use of ProcessBuilder.start() to 36 * create new processes. 37 * 38 * @author Martin Buchholz 39 * @since 1.5 40 */ 41 final class ProcessImpl { 42 ProcessImpl()43 private ProcessImpl() {} // Not instantiable 44 toCString(String s)45 private static byte[] toCString(String s) { 46 if (s == null) 47 return null; 48 byte[] bytes = s.getBytes(); 49 byte[] result = new byte[bytes.length + 1]; 50 System.arraycopy(bytes, 0, 51 result, 0, 52 bytes.length); 53 result[result.length-1] = (byte)0; 54 return result; 55 } 56 57 // Only for use by ProcessBuilder.start() start(String[] cmdarray, java.util.Map<String,String> environment, String dir, ProcessBuilder.Redirect[] redirects, boolean redirectErrorStream)58 static Process start(String[] cmdarray, 59 java.util.Map<String,String> environment, 60 String dir, 61 ProcessBuilder.Redirect[] redirects, 62 boolean redirectErrorStream) 63 throws IOException 64 { 65 assert cmdarray != null && cmdarray.length > 0; 66 67 // Convert arguments to a contiguous block; it's easier to do 68 // memory management in Java than in C. 69 byte[][] args = new byte[cmdarray.length-1][]; 70 int size = args.length; // For added NUL bytes 71 for (int i = 0; i < args.length; i++) { 72 args[i] = cmdarray[i+1].getBytes(); 73 size += args[i].length; 74 } 75 byte[] argBlock = new byte[size]; 76 int i = 0; 77 for (byte[] arg : args) { 78 System.arraycopy(arg, 0, argBlock, i, arg.length); 79 i += arg.length + 1; 80 // No need to write NUL bytes explicitly 81 } 82 83 int[] envc = new int[1]; 84 byte[] envBlock = ProcessEnvironment.toEnvironmentBlock(environment, envc); 85 86 int[] std_fds; 87 88 FileInputStream f0 = null; 89 FileOutputStream f1 = null; 90 FileOutputStream f2 = null; 91 92 try { 93 if (redirects == null) { 94 std_fds = new int[] { -1, -1, -1 }; 95 } else { 96 std_fds = new int[3]; 97 98 if (redirects[0] == Redirect.PIPE) 99 std_fds[0] = -1; 100 else if (redirects[0] == Redirect.INHERIT) 101 std_fds[0] = 0; 102 else { 103 f0 = new FileInputStream(redirects[0].file()); 104 std_fds[0] = f0.getFD().getInt$(); 105 } 106 107 if (redirects[1] == Redirect.PIPE) 108 std_fds[1] = -1; 109 else if (redirects[1] == Redirect.INHERIT) 110 std_fds[1] = 1; 111 else { 112 f1 = new FileOutputStream(redirects[1].file(), 113 redirects[1].append()); 114 std_fds[1] = f1.getFD().getInt$(); 115 } 116 117 if (redirects[2] == Redirect.PIPE) 118 std_fds[2] = -1; 119 else if (redirects[2] == Redirect.INHERIT) 120 std_fds[2] = 2; 121 else { 122 f2 = new FileOutputStream(redirects[2].file(), 123 redirects[2].append()); 124 std_fds[2] = f2.getFD().getInt$(); 125 } 126 } 127 128 return new UNIXProcess 129 (toCString(cmdarray[0]), 130 argBlock, args.length, 131 envBlock, envc[0], 132 toCString(dir), 133 std_fds, 134 redirectErrorStream); 135 } finally { 136 // In theory, close() can throw IOException 137 // (although it is rather unlikely to happen here) 138 try { if (f0 != null) f0.close(); } 139 finally { 140 try { if (f1 != null) f1.close(); } 141 finally { if (f2 != null) f2.close(); } 142 } 143 } 144 } 145 } 146