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UnixUtil.java

00001 package edu.virtualschool.jwaa;
00002 
00003 import java.io.BufferedReader;
00004 import java.io.InputStream;
00005 import java.io.InputStreamReader;
00006 
00011 public class UnixUtil
00012 {
00013   public final static String system(String cmd)
00014   {
00015     int ret = 0;
00016     try
00017     {
00018       String c = "/bin/sh -c " + cmd;
00019       Process process = Runtime.getRuntime().exec(c);
00020       ret = process.waitFor();
00021       if (ret != 0)
00022         return "UnixUtil.system(\"" + cmd + "\")=" + ret;
00023       return getString(process.getInputStream());
00024     }
00025     catch (Exception e) 
00026     {
00027       return "UnixUtil.system("+cmd+")=" + ret + ": " + e;
00028     }
00029   }
00030   private final static String getString(InputStream is)
00031     throws Exception
00032   {
00033     StringBuffer buf = new StringBuffer();
00034     InputStreamReader isr = new InputStreamReader(is);
00035     BufferedReader bis = new BufferedReader(isr);
00036     for (String line = ""; line != null; line = bis.readLine())
00037       buf.append(line);
00038     return buf.toString();
00039   }
00040   public static void system(GenericPage page, String commandLine, boolean escapeXml)
00041     throws Fault
00042   {
00043     try
00044     {
00045       Process process = Runtime.getRuntime().exec(commandLine);
00046       int procReturn = process.waitFor();
00047       if (procReturn != 0) throw new Fault
00048           ("process \"" + commandLine + "\" exited with value " + procReturn);
00049       page.send("<ol>");
00050       StreamUtil.sendStream(page, process.getInputStream(), escapeXml);
00051       page.send("</ol>");
00052     }
00053     catch (Exception e) { e.printStackTrace(); }
00054   }
00055 }