merged 1.1 branch into head

[mir.git] / source / mir / util / ShellRoutines.java

diff --git a/source/mir/util/ShellRoutines.java b/source/mir/util/ShellRoutines.java
new file mode 100644 (file)
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+++ b/source/mir/util/ShellRoutines.java
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+/*
+ * Copyright (C) 2001, 2002 The Mir-coders group
+ *
+ * This file is part of Mir.
+ *
+ * Mir is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Mir 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Mir; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * In addition, as a special exception, The Mir-coders gives permission to link
+ * the code of this program with  any library licensed under the Apache Software License,
+ * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
+ * (or with modified versions of the above that use the same license as the above),
+ * and distribute linked combinations including the two.  You must obey the
+ * GNU General Public License in all respects for all of the code used other than
+ * the above mentioned libraries.  If you modify this file, you may extend this
+ * exception to your version of the file, but you are not obligated to do so.
+ * If you do not wish to do so, delete this exception statement from your version.
+ */
+package mir.util;
+
+import mir.log.LoggerWrapper;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.io.Reader;
+
+/**
+ * Execute system commands. Warning: the current implementation is
+ * unix specific.
+ */
+public class ShellRoutines {
+  protected ShellRoutines() {
+  }
+
+  /**
+   * Executes a full command (including arguments) in a subshell
+   * and returns the output of the command in a string. Output is
+   * redirected into a temporary fil which is then read into the string
+   */
+  public static String execIntoString(String command) throws IOException {
+    return new String(execIntoByteArray(command));
+  }
+
+  /**
+   * Executes a full command (including arguments) in a subshell
+   * and returns the output of the command in an array of
+   * bytes. Output is redirected into a temporary file which is then
+   * read into an array of bytes
+   */
+  public static byte[] execIntoByteArray(String command) throws IOException {
+    File commandOutput = File.createTempFile("mircmd", "");
+    try {
+      int exitStatus;
+      try {
+        // WARNING: unix specific
+
+        exitStatus = Runtime.getRuntime().exec(new String[]{
+          "/bin/sh", "-c",
+          command + " " +
+            ">" + commandOutput.getAbsolutePath()
+        }).waitFor();
+      }
+      catch (InterruptedException e) {
+        throw new IOException(e.toString());
+      }
+      if (exitStatus != 0) {
+        throw new IOException("command exit satus:" + exitStatus);
+      }
+      return FileRoutines.readFileIntoByteArray
+          (commandOutput.getAbsoluteFile());
+    }
+    finally {
+      commandOutput.delete();
+    }
+  }
+
+  /**
+   * Executes a full command (including arguments) in a subshell.
+   * Standard input and output go to /dev/null
+   */
+  public static void simpleExec(String command) throws IOException {
+    int exitStatus;
+    try {
+      // WARNING: unix specific
+//      exitStatus =
+      Process process = Runtime.getRuntime().exec(
+           new String[]{
+               "/bin/sh", "-c", command
+      });
+      Reader errorStreamReader = new InputStreamReader(process.getErrorStream());
+      ReaderLogger logger =
+          new ReaderLogger(errorStreamReader, new LoggerWrapper("Utility"));
+
+      new Thread(logger).start();
+
+      Reader outputStreamReader = new InputStreamReader(process.getInputStream());
+      logger = new ReaderLogger(outputStreamReader, new LoggerWrapper("Utility"));
+      new Thread(logger).start();
+
+      exitStatus = process.waitFor();
+    }
+    catch (InterruptedException e) {
+      throw new IOException("Interrupted");
+    }
+
+    if (exitStatus != 0) {
+      throw new IOException("command exit satus:" + exitStatus);
+    }
+  }
+
+  private static class ReaderLogger implements Runnable {
+    private Reader reader;
+    private PrintWriter writer;
+
+    ReaderLogger(Reader aReader, LoggerWrapper aLogger) {
+      reader = aReader;
+      writer = aLogger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE);
+    }
+
+    public void run() {
+      try {
+        int size;
+        char[] buffer = new char[1024];
+        while ((size = reader.read(buffer)) >= 0) {
+          writer.write(buffer,0,size);
+        }
+      }
+      catch (IOException e) {
+      }
+
+      writer.close();
+      try {
+        reader.close();
+      }
+      catch (Exception e) {
+      }
+    }
+  }
+
+}