"at" UNIX Command in Java Program

Friends,
1. "at" command in UNIX execute Unix command at a scheduled time. 2. For each user there will be a table maintained internally which can be accessed by "at" with "-l" argument.
3. A mail will be sent to the owner with the output of the commands as a message.
I tried to run the "at" command of Unix in JSP, which gets succesfully executed in Oracle 10g App Server container (Installed in Solaris machine). I have tested the successful execution of command with the log file. But I haven't got any mail for the output. If anyone had any idea, please help me.
The code I have wtitten is
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(new String[] {"sh","-c","at 2115 Dec 7 < /export/home/usr1/abc.sh"});
InputStream stderr = proc.getErrorStream();
InputStreamReader isr = new InputStreamReader(stderr);
BufferedReader br = new BufferedReader(isr);
String line = null;
logger.info("<ERROR>");
while ( (line = br.readLine()) != null)
logger.info(line);
logger.info("</ERROR>");
int exitVal = proc.waitFor();
logger.info("Process exitValue: " + exitVal);
My doubts are:
1. Who is the owner of the output of "at"command, which gets executed under Oracle 10g App Server container?
2. If no one is the owner, then where will the output of "at" command will go?
3. Is there any other way to execute "at" command of UNIX in java program? If so, then please help me.
Thanks in advance.
regards
Nandha Kumar.M

filestream I have to ask - what's a chav ?
I have doubts abut what it is :-)
Seriously though, what is that an abbreviation for?
That's a new one to me.
http://www.chavscum.co.uk
chavs are roughly analogous to rednecksI wouldn't use that analogy. While both may lack certain social graces, rednecks typically don't receive ASBOs.
Chavs favor small cars with lots of bling whereas rednecks are likely to drive a pickup or a large sedan.
Chavs have pitbulls in their yards (gardens), rednecks an '84 Mustang LX on cinder blocks.
etc, etc.
Message was edited by:
filestream
Message was edited by:
filestream

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    The same applet signed with signcode failed to start in Internet explorer, the
    error message in the Java Console is:
    Error loading class: FileIO
    java.lang.NoClassDefFoundError
    java.lang.ClassNotFoundException: FileIO
            at com/ms/vm/loader/URLClassLoader.loadClass
            at com/ms/vm/loader/URLClassLoader.loadClass
            at com/ms/applet/AppletPanel.securedClassLoad
            at com/ms/applet/AppletPanel.processSentEvent
            at com/ms/applet/AppletPanel.processSentEvent
            at com/ms/applet/AppletPanel.run
            at java/lang/Thread.run
    This bug can be reproduced always.
    ---------- BEGIN SOURCE ----------
    import java.io.*;
    import java.util.*;
    import java.awt.*;
    import java.awt.event.*;
    import java.applet.*;
    public class FileIO extends Applet implements ActionListener {
       public static void main(String[] args) {
          new FileIO();
          F.addWindowListener(new WindowAdapter() {
             public void windowClosing(WindowEvent e) {
                System.exit(0);
       public void init() {
          String tmp=getParameter("Netscape");
          if (tmp!=null) {
             if (tmp.equals("1")) {
                try {
    netscape.security.PrivilegeManager.enablePrivilege("UniversalFileAccess");
                   NS=true;
                } catch (Throwable exception) {}
          new FileIO();
          F.setResizable(false);
       public void stop() {
          F.dispose();
       public FileIO() {
          newline=System.getProperty("line.separator");
          F.setLayout(new BorderLayout(0,0));
          String line,inbuf="";
          String newline=System.getProperty("line.separator");
          text=new TextArea(inbuf,24,80,TextArea.SCROLLBARS_BOTH);
          text.setFont(new Font("Courier",Font.PLAIN,12));
          text.setBackground(Color.cyan);
          text.setForeground(Color.black);
          F.add("Center",text);
          Panel pan=new Panel();
          pan.setLayout(new FlowLayout(1,0,0));
          pan.setBackground(Color.yellow);
          TF=new TextField(40);
          TF.setFont(new Font("Courier",Font.PLAIN,12));
          pan.add(TF);
          OP=new Button("Open");
          OP.addActionListener(this);
          pan.add(OP);
          FS=new Button("Save");
          FS.addActionListener(this);
          pan.add(FS);
          SA=new Button("Save-As");
          SA.addActionListener(this);
          pan.add(SA);
          reset=new Button("Reset");
          reset.addActionListener(this);
          pan.add(reset);
          F.add("South",pan);
          F.pack();
          Dimension screen=Toolkit.getDefaultToolkit().getScreenSize();
          Dimension size=F.getSize();
          int X=(screen.width-size.width)/2;
          int Y=(screen.height-size.height)/2;
          F.setLocation(X,Y);
          F.setVisible(true);
       public void actionPerformed(ActionEvent event) {
          String tmp="";
          String O=text.getText();
          StringTokenizer tkn=new StringTokenizer(O,newline);
          int ntkn=tkn.countTokens();
          Object ev=event.getSource();
          if (ev.equals(OP)) {
             FileDialog fd=new FileDialog(F,"File to open",FileDialog.LOAD);
             fd.setFile("*.java");
             fd.show();
             tmp=fd.getDirectory();
             if (fd.getFile()==null) {text.requestFocus(); return;}
             tmp+=fd.getFile();
             TF.setText(tmp);
             try {
                if (NS)
    {netscape.security.PrivilegeManager.enablePrivilege("UniversalFileRead");}
                BufferedReader reader=new BufferedReader(new FileReader(tmp));
                String line;
                String crlf="";
                tmp="";
                while ((line=reader.readLine())!=null) {
                   tmp+=crlf+line;
                   crlf="\n";
                reader.close();
                text.setText(tmp);
             } catch (Throwable e) {
                e.printStackTrace();
          } else if (ev.equals(FS) || ev.equals(SA)) {
             try {
                if (ev.equals(SA)) {
                   FileDialog fd=new FileDialog(F,"File to save",FileDialog.SAVE);
                   fd.setFile("*.java");
                   fd.show();
                   tmp=fd.getDirectory();
                   tmp+=fd.getFile();
                } else {
                   tmp=TF.getText();
                if (tmp.length()==0) {text.requestFocus(); return;}
                if (tmp.indexOf(".java")<0) tmp+=".java";
                TF.setText(tmp);
                if (NS)
    {netscape.security.PrivilegeManager.enablePrivilege("UniversalFileWrite");}
                FileOutputStream fos=new FileOutputStream(tmp);
                BufferedWriter out=new BufferedWriter(new OutputStreamWriter(new
    DataOutputStream(fos)));
                for (int i=0;i<ntkn;i++) out.write(tkn.nextToken()+newline);
                out.flush();
                out.close();
                if (NS)
    {netscape.security.PrivilegeManager.revertPrivilege("UniversalFileWrite");}
                System.out.println(tmp+" saved");
             } catch (Throwable e) {
                e.printStackTrace();
          } else if (ev.equals(reset)) {
             text.setText("");
             TF.setText("");
          text.requestFocus();
       private String replace(String input, String srch, String repl) {
          int i=input.indexOf(srch);
          while (i>=0) {
             input=input.substring(0,i)+repl+input.substring(i+srch.length());
             i=input.indexOf(srch);
          return input;
       private Button OP,FS,SA,reset,TB;
       private boolean newLine,NS=false;
       private TextArea text;
       private TextField TF;
       private final char NL='\n';
       private String content,newline;
       private static Frame F=new Frame("FileIO");
    ---------- END SOURCE ----------
    CUSTOMER WORKAROUND :
    build the signed applet with SDK1.3.1 or make it a signed
    applet that uses Java Plugin 1.4.0 (i.e., sign it with jarsigner).
    workaround :
    suggested_val :
    cust_name : Vira Van.
    dateCreated : 2002-03-24 19:52:18.4
    dateEvaluated : 2002-04-01 18:48:10.858

  • How do run unix command in java

    hi
    All unix command working fine in our java program.
    but i want change user in linux by using java. it's not working.
    "su root" This command onely not working.
    anybody know help me
    This is my ID [email protected]
    This my code
    <% String s = null;
    try{
    Process p = Runtime.getRuntime().exec("su root");
    BufferedReader stdInput = new BufferedReader(new
    InputStreamReader(p.getInputStream()));
    BufferedReader stdError = new BufferedReader(new
    InputStreamReader(p.getErrorStream()));
    out.println("Here is the standard output of the command:\n");
    while ((s = stdInput.readLine()) != null)
    out.println(s);
    catch(Exception e) {}
    %>

    I don't have further info to add to your first post, but think your guess seems quite reasonable. I thought of starting a new thread on the same topic, but think this (question) fits in here, too.
    I have Java code (freeware, not opensoure), intended for Unix, which basically provides the graphical interface and relies on an I/O layer (C + shell scripts) to do most of the work. I have access to the C+shell scripts which are opensource. I ported it to Cygwin and want to use it under Windows (there is no Cygwin native Java VM).
    My problem now boils down to " how to run commands under Unix and what differences are there with Windows". What are the variants?
    I have to guess what the program is doing when I get an IOException at some point. E.g.: a call to shell script may be made in a different way as to a compiled exe in Unix?. I found a way to bypass path problems because forward slashes are also accepted and /cygdrive/c construct can be replace by c:/; shell scripts can be compiled into exes using shc and they work; if symbolic links are replaced by duplication of exe files, they work. What will happen in an instance whereby a process runs a shell script dynamically, through a pipe (the shell script is compiled in the Cygwin/win version and receives parameters) in a construct like:
    pipefp = epopen(cmdbuf,"w"); /* (cmbuf is "makehdr par1 par2 ... ") (makehdr was a shell script and is now compiled exe for Cygwin/Windows) */?.
    Thanks.
    LT

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