Run Linux script with Runtime.exec

Hi there!
I want to run some Linux script files out of a Java application.
I'm currently using a code like this:
Runtime rt = Runtime.getRuntime();
Process p=rt.exec("//home//scriptFile1");But this isn't working. Although I'm getting no exeption, the file isn't executed.
It looks like he's doing something, but he's definitly not processing the file.
I think the problem is probably, that in scriptFile1, I call some other script files (which call itself some other script files).
E.g. like this:
scriptFile1:
scriptFile2
binary1
binary2
scriptFile3Any ideas?
Thank you!

Hi! I now get at least some error messages, when I call the script file:
knoppix@Knoppix:~/Desktop$ java Main
start
ERROR>/media/hda5/scripts/startds_2: line 1: stop: command not found
ERROR>/media/hda5/scripts/startds_2: line 3: dspp_2: command not found
ERROR>/media/hda5/scripts/startds_2: line 5: killcan: command not found
ERROR>/media/hda5/scripts/startds_2: line 7: canpdemsimeit: command not found
ERROR>/media/hda5/scripts/startds_2: line 9: demsimeit: command not found
ERROR>/media/hda5/scripts/startds_2: line 11: guidemsimeit: command not found
ERROR>/media/hda5/scripts/startds_2: line 13: MCAbrowser: command not found
ExitValue: 0These "lost" commands are all located in the same directory as the script I call, so I wonder why.
I could adjust every command by adding in front of it the absolute path in the script file. That would work. But maybe I can pass in some other way the directory, in which he should search for the commands. That would save me a lot of work...
I will RTFM but if anyone has currently an idea: please post...
THX

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Trying to run external script using Runtime.exec

Hey,
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Okay, so I implemented the changes from that website (thanks by the way for that link, it helps me understand this a little better). However, my problem is still occuring. Here is my new code:
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UNIX script with Runtime.exec and ssh

I am trying to run a script that is on a UNIX server which doesn't require a password to connect to. Here's my code:
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Thanks

Runtime.exec is not a shell and doesn't run a shell. Try
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BYe!
EXP

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However, when the command waits for the response, my Java app hangs.
After I call Runtime.exec, I create 2 threads to consume the contents of stderr and stdout. I then start them and call proc.waitFor()
I would expect to see the output of the command in the stdout stream even though the command hasn't exited. I had hoped to parse the output to determine the necessary response. However, the calls to read the contents of the stdout and stderr streams block and I never see any output.
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This article should help:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html

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Bug ID: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4058689

#include <stdio.h>
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buon giorno
buon giorno

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Christopher Collins
Marineering Limited

Thanks jmschrei,
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Ahh, you are redirecting the standard out from the ftp command to a file, therefore no output is sendt back to your java code,
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Thanks a lot!
Horst

hey BIJ, thank you so much man. start really does wonders!! i was stuck with invoking a fortran program for last couple of days and now i went through your postings and tried with start. it did work!!
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Runtime exec to run linux scripts

Hi,
I have been having trouble running a simple linux script from within my java program. So far, this is the command line i am passing to the exec() method:
String[] commandArray = {"/bin/sh", "-c", "sh",
"/home/charles/java/ideaProjects/Condor/linuxScripts/LinuxSubmit.sh",
"TwoMinTest.cmd"};
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I've fixed it for anyone who's interested, this is what i did:
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and it flew like a bird.
charles

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Hi all,
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java JMSAdmin < jcajms.txt
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please help.
Tanks

Normally, you must prepend the command with a call to the command shell (eg /bin/sh).
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Problems with runtime.exec()

Hi All,
I am having a problem using runtime.exec()
in servlet to call a java file from the server.The server is a linux one and i am using a tomcat server-4.1.24 the server contains
some java files which i need to invoke with the help of the servlet program so i try to use exec() in servlet to invoke a particular java file in the server.The program is compiling well but no information
is displayed on the browser.Where in the servlet program i try to print the details of the particular java program that is in the server.For ur
reference i will post the code :-
import javax.servlet.http.*;
import javax.servlet.*;
import java.io.*;
public class ExeServlet extends HttpServlet
public void doGet(HttpServletRequest req,HttpServletResponse res)throws ServletException,IOException
try
String path = getServletContext().getRealPath("/var/jakarta/webapps/examples/WEB-INF/classes/ServletExample.java");
/*Where it is the path of the java file that resides in the server machine(linux)Which i want to invoke and print its details on the browser*/
Runtime runtime=Runtime.getRuntime();
Process proc=runtime.exec(path );
BufferedReader br=new BufferedReader(new InputStreamReader(proc.getInputStream()));
res.setContentType("text/html");
PrintWriter pw=res.getWriter();
pw.println("<b>");
String line=null;
while((line=br.readLine())!=null)
{ pw.println(line); //Displaying the details of the ServletExample.java file in the browser
pw.println("</b>");
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What is the problem here?I was so frustrated with this.Pls. do provide an immediate reply if there is any code regarding this is working pls. do provide it.It is Urgent.I will be waiting for ur reply.
Thanx,
m.ananthu

Hi Leo,
Thank u for the reply i still have the problem with exec() in servlets.Has i said earlier in my previous mail by using exec() i trying to execute the output of a c-program for eg,Hello.run which provides an output of "HelloWorld" which is a sample eg.The Hello.run is the directory /var/jakarta/webapps/examples/WEB-INF/classes which is also the directory where my servlet program is.Where i am using a tomcat server-4.1.24 on the linux machine 7.3.Which is the server ofcourse.
Here by using a servlet program i try to exceute the Hello.run c-program and display the output in the browser.This is what i need to do.
I also used a sample core java class put the exec() there in a method and i try to call the method in the servlet.Which is also not working.
Here is that example :-
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public class UsingExec
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System.out.println("ExeDisplay");
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p.waitFor();
return "true";
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ue.ExeDisplay();
When i run this program only ExeDisplay at the top is displayed.
Here is the Servlet program:-
import javax.servlet.http.*;
import javax.servlet.*;
import java.io.*;
public class ExeServlet extends HttpServlet
public void doGet(HttpServletRequest req,HttpServletResponse res)throws ServletException,IOException
try
res.setContentType("text/html");
PrintWriter pw=res.getWriter();
UsingExec ue=new UsingExec();
String line=ue.ExeDisplay();
pw.println(line);
catch (Exception e)
When i display this program on the browser only "false" is displayed from the UsingExec.java & nothing is displayed.
Thanx,
m.ananthu

Error in opening a file with name in chinese characters with Runtime.exec

The issue at hand is when I try to open a file with file name containing chinese characters in a localized environment in Windows through the following java code:
Runtime.exec("rundll32 SHELL32.DLL,ShellExec_RunDLL {File_With_FileName_containing_Chinese_character}");
the following error is thrown by windows.
Cannot open file "C:\??.txt".
with the exception
java.io.IOException: CreateProcess: [Ljava.lang.String;@f5da06 error=2
        at java.lang.Win32Process.create(Native Method)
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        at java.lang.Runtime.execInternal(Native Method)
        at java.lang.Runtime.exec(Runtime.java:566)
        at java.lang.Runtime.exec(Runtime.java:428)
        at java.lang.Runtime.exec(Runtime.java:364)
        at java.lang.Runtime.exec(Runtime.java:326)
        at Launcher.main(Launcher.java:26)
When I try to use the same command (shown below) from the Windows Run command, the file opens sucessfully
rundll32 SHELL32.DLL,ShellExec_RunDLL {File_With_FileName_containing_Chinese_character}
Please suggest.
Thanks in advance

This may be a file association problem. To solve that:
In Windows 7:
1. Right-click the file,
2. Select "Open With"
select [Your Program Here]
3. Check always use this program.
In Windows XP:
1. Locate the file as you have described above
2. Right click the file
3. Select Open with from the pop-up menu
4. Click Choose default program…
5. Select Excel in the Recommended Programs box
6. Check Always use the selected program to open this kind of file
7. Click on OK.
1. Make Excel not available from Office 2007 listed under Programs and Features in Control Panel.
2. Take a registry backup using the steps given here
3. In the registry editor window expand HKEY_CLASSES_ROOT and navigate to .xls right and delete it.
4. Exit Registry Editor
5. Undo Step 1 to make Excel available.
6. Restart the computer and verify it the issue is fixed.
If this answer solves your problem, please check Mark as Answered. If this answer helps, please click the Vote as Helpful button. Cheers, Shane Devenshire

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I'm trying to run an example from "The Java Programming Language" book by Arnold, Gosling and Holmes. I'm trying to run a system level command and get the results. The code looks like:
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String[] outputData= null;
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String line;
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outputData = null;
} catch (Exception e){
System.out.println("It got here!");
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It gets to the while line, trys to run the input.readLine() and kicks out the exception that looks like:
It got here!
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Hi, duffymo, hope you can help me. Consider this servlet code:
String theCommand = "csh /export/home/gls03/sasstuff/runsas.csh /export/home/g
ls03/sasstuff/gary2.sas";
//Create a parent Process for the sas program subprocess:
Process p = rt.exec(theCommand);
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Here is the runsas.csh script:
#!/bin/csh
setenv LD_LIBRARY_PATH /opt/sybase/lib:/usr/lib:/usr/openwin/lib:/opt/SUNWspro/S
C2.0.1
setenv SASROOT /usr/local/CDC/SAS_8.2
setenv XKEYSYMDB /usr/local/CDC/SAS_8.2/X11/resource_files/XKeysymDB
$SASROOT/sas -sasuser /hpnpages/cgi-bin/applinks/hospcap/tmp $1
The execution never gets to the println statment, here is the error:
class java.io.IOException Exception. Message: CreateProcess: csh /export/home/g
ls03/sasstuff/runsas.csh /export/home/gls03/sasstuff/gary2.sas error=2
java.io.IOException: CreateProcess: csh /export/home/gls03/sasstuff/runsas.csh /
export/home/gls03/sasstuff/gary2.sas error=2
at java.lang.Win32Process.create(Native Method)
at java.lang.Win32Process.<init>(Win32Process.java:66)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:551)
at java.lang.Runtime.exec(Runtime.java:477)
at java.lang.Runtime.exec(Runtime.java:443)
at sasRunnerNew.doPost(sasRunnerNew.java:103)
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at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:262)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:21)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
at us.ny.state.health.hin.hinutil.HinFilter.doFilter(HinFilter.java:124)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.ja
va:27)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppSe
rvletContext.java:2643)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestIm
pl.java:2359)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
The command runs fine in unix.
I've also tried using these as arguments to exec:
String theCommand = "/bin/csh /export/home/gls03/sasstuff/runsas.csh /export/home/gls03/sasstuff/gary2.sas";
String[] theCommand = {"csh", "/export/home/gls03/sasstuff/runsas.csh", "/export/home/gls03/sasstuff/gary2.sas"};
These generate the same error. I'm thinking this is a sas-specific problem.
Thanks for any help. Gary

Problem with runtime.exec().It hangs Up

Hi all,
I am having a problem with the runtime.exec method.I am trying to execute linux commands using this method.For most of the commands it works fine.But when i tried to change the user with the su command in linux my program hung up.So please help me to get around this.any help would be highly appreciable..
I am pasting the code..
<code>
Process p=null;
int ch=0;
try
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String unlock_command="sh changeuser.sh";
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InputStreamReader myIStreamReader = new InputStreamReader(p.getInputStream());
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p.waitFor();
int p_exitvalue = p.exitValue();
System.out.println("After executing the command and the exit value = "+p_exitvalue);
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System.out.println(anIOException);
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</code>
Thanks
HowRYou

Hi sabre,
What you have pointed out is right.But if i change the user as root then it will not ask for a password.Isn't it.Anyway thank you for giving your suggestions.Can yoiu help me more.Waiting for all of your help.I will try to swoitch between different users othere than root by giving the password.So just help me.

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from a quick google-trip it seems Krunner doesn't always respect $PATH.
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Run Linux script with Runtime.exec

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