зеркало из https://github.com/mono/ikvm-fork.git
550 строки
19 KiB
Java
550 строки
19 KiB
Java
/*
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* Copyright (c) 1995, 2010, 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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/*IKVM*/
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/*
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* Modified for IKVM by Jeroen Frijters
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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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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import cli.System.AsyncCallback;
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import cli.System.IAsyncResult;
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import cli.System.Diagnostics.ProcessStartInfo;
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import cli.System.IO.FileAccess;
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import cli.System.IO.FileShare;
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import cli.System.IO.FileMode;
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import cli.System.IO.FileOptions;
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import cli.System.IO.FileStream;
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import cli.System.IO.Stream;
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import cli.System.Security.AccessControl.FileSystemRights;
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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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static class fdAccess {
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static Stream getHandle(FileDescriptor fd) {
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return fd.getStream();
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}
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}
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/**
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* Open a file for writing. If {@code append} is {@code true} then the file
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* is opened for atomic append directly and a FileOutputStream constructed
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* with the resulting handle. This is because a FileOutputStream created
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* to append to a file does not open the file in a manner that guarantees
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* that writes by the child process will be atomic.
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*/
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private static FileOutputStream newFileOutputStream(File f, boolean append)
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throws IOException
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{
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if (append) {
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String path = f.getPath();
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SecurityManager sm = System.getSecurityManager();
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if (sm != null)
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sm.checkWrite(path);
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final FileDescriptor fd = openForAtomicAppend(path);
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return AccessController.doPrivileged(
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new PrivilegedAction<FileOutputStream>() {
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public FileOutputStream run() {
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return new FileOutputStream(fd);
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}
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}
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);
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} else {
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return new FileOutputStream(f);
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}
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}
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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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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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Stream[] stdHandles;
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if (redirects == null) {
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stdHandles = new Stream[3];
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} else {
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stdHandles = new Stream[3];
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if (redirects[0] == Redirect.PIPE)
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stdHandles[0] = null;
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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] = null;
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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 = newFileOutputStream(redirects[1].file(),
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redirects[1].append());
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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] = null;
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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 = newFileOutputStream(redirects[2].file(),
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redirects[2].append());
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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, environment, dir,
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stdHandles, redirectErrorStream);
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} finally {
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// HACK prevent the File[In|Out]putStream objects from closing the streams
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if (f0 != null)
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cli.System.GC.SuppressFinalize(f0);
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if (f1 != null)
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cli.System.GC.SuppressFinalize(f1);
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if (f2 != null)
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cli.System.GC.SuppressFinalize(f2);
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}
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}
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private cli.System.Diagnostics.Process handle;
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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 java.util.Map<String,String> envblock,
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final String path,
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final Stream[] 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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// give the runtime an opportunity to map executables from VFS to a real executable
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cmd[0] = mapVfsExecutable(cmd[0]);
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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] == null)
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stdin_stream = ProcessBuilder.NullOutputStream.INSTANCE;
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else {
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FileDescriptor stdin_fd = FileDescriptor.fromStream(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] == null)
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stdout_stream = ProcessBuilder.NullInputStream.INSTANCE;
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else {
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FileDescriptor stdout_fd = FileDescriptor.fromStream(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] == null)
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stderr_stream = ProcessBuilder.NullInputStream.INSTANCE;
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else {
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FileDescriptor stderr_fd = FileDescriptor.fromStream(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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private static native String mapVfsExecutable(String path);
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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 int exitValue() {
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if (!handle.get_HasExited())
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throw new IllegalThreadStateException("process has not exited");
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return handle.get_ExitCode();
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}
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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 void waitForInterruptibly(cli.System.Diagnostics.Process handle) throws InterruptedException {
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// to be interruptable we have to use polling
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// (on .NET 2.0 WaitForExit is actually interruptible, but this isn't documented)
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Thread current = Thread.currentThread();
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while (!current.isInterrupted() && !handle.WaitForExit(100))
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;
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}
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public void destroy() { terminateProcess(handle); }
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private static void terminateProcess(cli.System.Diagnostics.Process handle) {
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try {
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if (false) throw new cli.System.ComponentModel.Win32Exception();
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if (false) throw new cli.System.InvalidOperationException();
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handle.Kill();
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} catch (cli.System.ComponentModel.Win32Exception _) {
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} catch (cli.System.InvalidOperationException _) {
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}
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}
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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 cli.System.Diagnostics.Process create(String cmdstr,
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java.util.Map<String,String> envblock,
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String dir,
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Stream[] stdHandles,
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boolean redirectErrorStream)
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throws IOException {
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int programEnd = parseCommandString(cmdstr);
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int argumentsStart = programEnd;
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if (cmdstr.length() > argumentsStart && cmdstr.charAt(argumentsStart) == ' ') {
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argumentsStart++;
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}
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ProcessStartInfo si = new ProcessStartInfo(cmdstr.substring(0, programEnd), cmdstr.substring(argumentsStart));
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si.set_UseShellExecute(false);
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si.set_RedirectStandardError(true);
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si.set_RedirectStandardOutput(true);
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si.set_RedirectStandardInput(true);
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si.set_CreateNoWindow(true);
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if (dir != null) {
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si.set_WorkingDirectory(dir);
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}
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if (envblock != null) {
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si.get_EnvironmentVariables().Clear();
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for (String key : envblock.keySet()) {
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si.get_EnvironmentVariables().set_Item(key, envblock.get(key));
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}
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}
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cli.System.Diagnostics.Process proc;
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try {
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if (false) throw new cli.System.ComponentModel.Win32Exception();
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if (false) throw new cli.System.InvalidOperationException();
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proc = cli.System.Diagnostics.Process.Start(si);
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} catch (cli.System.ComponentModel.Win32Exception x1) {
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throw new IOException(x1.getMessage());
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} catch (cli.System.InvalidOperationException x2) {
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throw new IOException(x2.getMessage());
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}
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Stream stdin = proc.get_StandardInput().get_BaseStream();
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Stream stdout = proc.get_StandardOutput().get_BaseStream();
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Stream stderr = proc.get_StandardError().get_BaseStream();
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if (stdHandles[0] != null) {
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connectPipe(stdHandles[0], stdin);
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stdHandles[0] = null;
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} else {
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stdHandles[0] = stdin;
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}
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Stream stdoutDrain = null;
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if (stdHandles[1] != null) {
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stdoutDrain = stdHandles[1];
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connectPipe(stdout, stdoutDrain);
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stdHandles[1] = null;
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} else if (redirectErrorStream) {
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PipeStream pipe = new PipeStream();
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connectPipe(stdout, pipe);
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connectPipe(stderr, pipe);
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stdHandles[1] = pipe;
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} else {
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stdHandles[1] = stdout;
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}
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if (redirectErrorStream) {
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if (stdoutDrain != null) {
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connectPipe(stderr, stdoutDrain);
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}
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stdHandles[2] = null;
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} else if (stdHandles[2] != null) {
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connectPipe(stderr, stdHandles[2]);
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stdHandles[2] = null;
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} else {
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stdHandles[2] = stderr;
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}
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return proc;
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}
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private static final class PipeStream extends Stream
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{
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private final byte[] buf = new byte[4096];
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private int pos;
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private int users = 2;
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@Override
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public synchronized int Read(byte[] buffer, int offset, int count)
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{
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if (count == 0)
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{
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return 0;
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}
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while (pos == 0)
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{
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try
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{
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wait();
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}
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catch (InterruptedException _) { }
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}
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if (pos == -1)
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{
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return 0;
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}
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count = Math.min(count, pos);
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System.arraycopy(buf, 0, buffer, offset, count);
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pos -= count;
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System.arraycopy(buf, count, buf, 0, pos);
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notifyAll();
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return count;
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}
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@Override
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public synchronized void Write(byte[] buffer, int offset, int count)
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{
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while (buf.length - pos < count)
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{
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try
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{
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wait();
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}
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catch (InterruptedException _) { }
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}
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System.arraycopy(buffer, offset, buf, pos, count);
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pos += count;
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notifyAll();
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}
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@Override
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public synchronized void Close()
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{
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if (--users == 0)
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{
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pos = -1;
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notifyAll();
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}
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}
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@Override
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public boolean get_CanRead()
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{
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return true;
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}
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@Override
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public boolean get_CanSeek()
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{
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return false;
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}
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@Override
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public boolean get_CanWrite()
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{
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return true;
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}
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@Override
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public void Flush()
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{
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}
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@Override
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public long get_Length()
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{
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ikvm.runtime.Util.throwException(new cli.System.NotSupportedException());
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return 0;
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}
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@Override
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public long get_Position()
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{
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ikvm.runtime.Util.throwException(new cli.System.NotSupportedException());
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return 0;
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}
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@Override
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public long Seek(long offset, cli.System.IO.SeekOrigin origin)
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{
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ikvm.runtime.Util.throwException(new cli.System.NotSupportedException());
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return 0;
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}
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@Override
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public void SetLength(long value)
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{
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ikvm.runtime.Util.throwException(new cli.System.NotSupportedException());
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}
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@Override
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public void set_Position(long position)
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{
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ikvm.runtime.Util.throwException(new cli.System.NotSupportedException());
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}
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}
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private static native int parseCommandString(String cmdstr);
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/**
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* Opens a file for atomic append. The file is created if it doesn't
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* already exist.
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*
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* @param file the file to open or create
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* @return the native HANDLE
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*/
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private static FileDescriptor openForAtomicAppend(String path)
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throws IOException {
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try {
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if (false) throw new cli.System.ArgumentException();
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if (false) throw new cli.System.IO.IOException();
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if (false) throw new cli.System.Security.SecurityException();
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if (false) throw new cli.System.UnauthorizedAccessException();
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return FileDescriptor.fromStream(new FileStream(path, FileMode.wrap(FileMode.Append), FileSystemRights.wrap(FileSystemRights.AppendData), FileShare.wrap(FileShare.ReadWrite), 1, FileOptions.wrap(FileOptions.None)));
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} catch (cli.System.ArgumentException x) {
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throw new IOException(x.getMessage());
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} catch (cli.System.IO.IOException x) {
|
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throw new IOException(x.getMessage());
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} catch (cli.System.Security.SecurityException x) {
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throw new IOException(x.getMessage());
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} catch (cli.System.UnauthorizedAccessException x) {
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throw new IOException(x.getMessage());
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}
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}
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private static void connectPipe(final Stream in, final Stream out) {
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final byte[] buf = new byte[4096];
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final AsyncCallback[] callback = new AsyncCallback[1];
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callback[0] = new AsyncCallback(new AsyncCallback.Method() {
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public void Invoke(IAsyncResult ar) {
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try {
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int count = in.EndRead(ar);
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if (count > 0) {
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out.Write(buf, 0, count);
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out.Flush();
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in.BeginRead(buf, 0, buf.length, callback[0], null);
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} else {
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out.Close();
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}
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} catch (Throwable _) {
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}
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}
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});
|
|
try {
|
|
in.BeginRead(buf, 0, buf.length, callback[0], null);
|
|
} catch (Throwable _) {
|
|
}
|
|
}
|
|
}
|