toolchain/gcc/libjava/java/lang/PosixProcess.java

   1 // PosixProcess.java - Subclass of Process for POSIX systems.
   2
   3 /* Copyright (C) 1998, 1999  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 package java.lang;
  12
  13 import java.io.File;
  14 import java.io.InputStream;
  15 import java.io.OutputStream;
  16 import java.io.IOException;
  17
  18 /**
  19  * @author Tom Tromey <tromey@cygnus.com>
  20  * @date May 3, 1999
  21  */
  22
  23 // This is entirely internal to our implementation.
  24
  25 // This file is copied to `ConcreteProcess.java' before compilation.
  26 // Hence the class name apparently does not match the file name.
  27 final class ConcreteProcess extends Process
  28 {
  29   public native void destroy ();
  30
  31   public int exitValue ()
  32   {
  33     if (! hasExited)
  34       throw new IllegalThreadStateException("Process has not exited");
  35     return status;
  36   }
  37
  38   public InputStream getErrorStream ()
  39   {
  40     return errorStream;
  41   }
  42
  43   public InputStream getInputStream ()
  44   {
  45     return inputStream;
  46   }
  47
  48   public OutputStream getOutputStream ()
  49   {
  50     return outputStream;
  51   }
  52
  53   public native int waitFor () throws InterruptedException;
  54
  55   // This is used for actual initialization, as we can't write a
  56   // native constructor.
  57   public native void startProcess (String[] progarray,
  58                                    String[] envp,
  59                                    File dir)
  60     throws IOException;
  61
  62   // This file is copied to `ConcreteProcess.java' before
  63   // compilation.  Hence the constructor name apparently does not
  64   // match the file name.
  65   public ConcreteProcess (String[] progarray,
  66                           String[] envp,
  67                           File dir)
  68     throws IOException
  69   {
  70     startProcess (progarray, envp, dir);
  71   }
  72
  73   // The process id.  This is cast to a pid_t on the native side.
  74   private long pid;
  75
  76   // True when child has exited.
  77   private boolean hasExited;
  78
  79   // The exit status, if the child has exited.
  80   private int status;
  81
  82   // The streams.
  83   private InputStream errorStream;
  84   private InputStream inputStream;
  85   private OutputStream outputStream;
  86 }