author | ohair |
Tue, 25 May 2010 15:58:33 -0700 | |
changeset 5506 | 202f599c92aa |
parent 715 | f16baef3a20e |
child 5787 | a0af7b8e80ed |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.lang; |
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import java.io.IOException; |
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import java.io.File; |
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import java.io.InputStream; |
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import java.io.OutputStream; |
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import java.io.FileInputStream; |
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import java.io.FileOutputStream; |
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import java.io.FileDescriptor; |
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import java.io.BufferedInputStream; |
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import java.io.BufferedOutputStream; |
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import java.lang.ProcessBuilder.Redirect; |
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/* This class is for the exclusive use of ProcessBuilder.start() to |
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* create new processes. |
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* |
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* @author Martin Buchholz |
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* @since 1.5 |
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*/ |
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final class ProcessImpl extends Process { |
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private static final sun.misc.JavaIOFileDescriptorAccess fdAccess |
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= sun.misc.SharedSecrets.getJavaIOFileDescriptorAccess(); |
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// System-dependent portion of ProcessBuilder.start() |
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static Process start(String cmdarray[], |
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java.util.Map<String,String> environment, |
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String dir, |
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ProcessBuilder.Redirect[] redirects, |
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boolean redirectErrorStream) |
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throws IOException |
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{ |
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String envblock = ProcessEnvironment.toEnvironmentBlock(environment); |
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FileInputStream f0 = null; |
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FileOutputStream f1 = null; |
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FileOutputStream f2 = null; |
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try { |
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long[] stdHandles; |
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if (redirects == null) { |
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stdHandles = new long[] { -1L, -1L, -1L }; |
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} else { |
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stdHandles = new long[3]; |
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if (redirects[0] == Redirect.PIPE) |
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stdHandles[0] = -1L; |
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else if (redirects[0] == Redirect.INHERIT) |
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stdHandles[0] = fdAccess.getHandle(FileDescriptor.in); |
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else { |
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f0 = new FileInputStream(redirects[0].file()); |
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stdHandles[0] = fdAccess.getHandle(f0.getFD()); |
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} |
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if (redirects[1] == Redirect.PIPE) |
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stdHandles[1] = -1L; |
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else if (redirects[1] == Redirect.INHERIT) |
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stdHandles[1] = fdAccess.getHandle(FileDescriptor.out); |
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else { |
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f1 = redirects[1].toFileOutputStream(); |
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stdHandles[1] = fdAccess.getHandle(f1.getFD()); |
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} |
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if (redirects[2] == Redirect.PIPE) |
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stdHandles[2] = -1L; |
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else if (redirects[2] == Redirect.INHERIT) |
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stdHandles[2] = fdAccess.getHandle(FileDescriptor.err); |
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else { |
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f2 = redirects[2].toFileOutputStream(); |
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stdHandles[2] = fdAccess.getHandle(f2.getFD()); |
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} |
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} |
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return new ProcessImpl(cmdarray, envblock, dir, |
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stdHandles, redirectErrorStream); |
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} finally { |
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// In theory, close() can throw IOException |
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// (although it is rather unlikely to happen here) |
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try { if (f0 != null) f0.close(); } |
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finally { |
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try { if (f1 != null) f1.close(); } |
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finally { if (f2 != null) f2.close(); } |
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} |
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} |
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} |
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private long handle = 0; |
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private OutputStream stdin_stream; |
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private InputStream stdout_stream; |
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private InputStream stderr_stream; |
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private ProcessImpl(final String cmd[], |
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final String envblock, |
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final String path, |
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final long[] stdHandles, |
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final boolean redirectErrorStream) |
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throws IOException |
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{ |
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// Win32 CreateProcess requires cmd[0] to be normalized |
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cmd[0] = new File(cmd[0]).getPath(); |
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StringBuilder cmdbuf = new StringBuilder(80); |
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for (int i = 0; i < cmd.length; i++) { |
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if (i > 0) { |
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cmdbuf.append(' '); |
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} |
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String s = cmd[i]; |
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if (s.indexOf(' ') >= 0 || s.indexOf('\t') >= 0) { |
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if (s.charAt(0) != '"') { |
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cmdbuf.append('"'); |
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cmdbuf.append(s); |
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if (s.endsWith("\\")) { |
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cmdbuf.append("\\"); |
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} |
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cmdbuf.append('"'); |
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} else if (s.endsWith("\"")) { |
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/* The argument has already been quoted. */ |
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cmdbuf.append(s); |
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} else { |
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/* Unmatched quote for the argument. */ |
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throw new IllegalArgumentException(); |
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} |
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} else { |
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cmdbuf.append(s); |
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} |
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} |
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String cmdstr = cmdbuf.toString(); |
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handle = create(cmdstr, envblock, path, |
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stdHandles, redirectErrorStream); |
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java.security.AccessController.doPrivileged( |
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new java.security.PrivilegedAction<Void>() { |
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public Void run() { |
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if (stdHandles[0] == -1L) |
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stdin_stream = new ProcessBuilder.NullOutputStream(); |
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else { |
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FileDescriptor stdin_fd = new FileDescriptor(); |
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fdAccess.setHandle(stdin_fd, stdHandles[0]); |
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stdin_stream = new BufferedOutputStream( |
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new FileOutputStream(stdin_fd)); |
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} |
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if (stdHandles[1] == -1L) |
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stdout_stream = new ProcessBuilder.NullInputStream(); |
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else { |
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FileDescriptor stdout_fd = new FileDescriptor(); |
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fdAccess.setHandle(stdout_fd, stdHandles[1]); |
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stdout_stream = new BufferedInputStream( |
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new FileInputStream(stdout_fd)); |
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} |
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if (stdHandles[2] == -1L) |
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stderr_stream = new ProcessBuilder.NullInputStream(); |
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else { |
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FileDescriptor stderr_fd = new FileDescriptor(); |
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fdAccess.setHandle(stderr_fd, stdHandles[2]); |
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stderr_stream = new FileInputStream(stderr_fd); |
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} |
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return null; }}); |
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} |
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public OutputStream getOutputStream() { |
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return stdin_stream; |
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} |
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public InputStream getInputStream() { |
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return stdout_stream; |
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} |
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public InputStream getErrorStream() { |
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return stderr_stream; |
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} |
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public void finalize() { |
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closeHandle(handle); |
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} |
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private static final int STILL_ACTIVE = getStillActive(); |
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private static native int getStillActive(); |
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public int exitValue() { |
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int exitCode = getExitCodeProcess(handle); |
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if (exitCode == STILL_ACTIVE) |
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throw new IllegalThreadStateException("process has not exited"); |
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return exitCode; |
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} |
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private static native int getExitCodeProcess(long handle); |
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public int waitFor() throws InterruptedException { |
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waitForInterruptibly(handle); |
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if (Thread.interrupted()) |
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throw new InterruptedException(); |
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return exitValue(); |
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} |
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private static native void waitForInterruptibly(long handle); |
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public void destroy() { terminateProcess(handle); } |
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private static native void terminateProcess(long handle); |
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/** |
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* Create a process using the win32 function CreateProcess. |
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* |
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* @param cmdstr the Windows commandline |
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* @param envblock NUL-separated, double-NUL-terminated list of |
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* environment strings in VAR=VALUE form |
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* @param dir the working directory of the process, or null if |
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* inheriting the current directory from the parent process |
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* @param stdHandles array of windows HANDLEs. Indexes 0, 1, and |
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* 2 correspond to standard input, standard output and |
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* standard error, respectively. On input, a value of -1 |
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* means to create a pipe to connect child and parent |
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* processes. On output, a value which is not -1 is the |
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* parent pipe handle corresponding to the pipe which has |
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* been created. An element of this array is -1 on input |
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* if and only if it is <em>not</em> -1 on output. |
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* @param redirectErrorStream redirectErrorStream attribute |
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* @return the native subprocess HANDLE returned by CreateProcess |
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*/ |
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private static native long create(String cmdstr, |
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String envblock, |
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String dir, |
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long[] stdHandles, |
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boolean redirectErrorStream) |
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throws IOException; |
253 |
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private static native boolean closeHandle(long handle); |
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} |