Question

Running shell Script from Servlet

Asked by: chidu

Can anybody help me how to run shell scripts from  a servlet?

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Asked On
2000-11-02 at 07:31:33ID11737478
Tags

script

,

servlet

,

from

,

running

Topics

Java Programming Language

,

Java Servlets

Participating Experts
5
Points
50
Comments
8

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Answers

 

by: vpadmaPosted on 2000-11-02 at 07:43:28ID: 5053659

Try System.execute(name).

Padma.

 

by: Prasanna_HebbarPosted on 2000-11-02 at 08:27:32ID: 5054699

You can use exec command to run shell scripts/native code.

String shellscript = "/home/abcd/shellscript.sh"
Process proc = Runtime.getRuntime().exec(shellScript);
BufferedReader errorStream = new BufferedReader(new InputStreamReader(desktopProcess.getErrorStream()));
BufferedReader inStream = new BufferedReader(new InputStreamReader(desktopProcess.getInputStream()));
proc.waitFor();

Now the shell script is run successfully. You can use inStream to read any output of shellscript and errorStream to read any errors in the shell script.

 

by: omerkosePosted on 2000-11-02 at 08:41:11ID: 5055099

Padma: A little correction  

In order to run the shell script, do the following

1. create a shell script, for example
   ex1.sh
   say it contains,
   ps -A | grep ora_

2. give execute permissions to all
    chmod +x ex1.sh

3. Make sure you have read access to the parent directory for others

4. Inside your servlet code
   
    Process proc = Runtime.exec("/home/padma/ex1.sh");
   
Since it is a shell script, it is not possible to get the stderr or stdout streams. I would suggest, doing the following if you are interested in the output
   Process proc = Runtime.exec("/home/padma/ex1.sh > ex1.out");
 
Then you open a FileReader to read ex1.out.
Again, Since you are in servlet environement, you might endup having threading issues..So, I recommend creating a unique file output name (using current thread id or something similar)

if want to wait for the shell script to complete, you can use
  proc.waitfor();


Good Luck

 

by: omerkosePosted on 2000-11-02 at 08:42:33ID: 5055141

opps...sorry prasanna..I think we both typed our comments at the same time..I didn't see yours. when I posted mine..Not meant to be a repetition..

 

by: chiduPosted on 2000-11-02 at 20:39:25ID: 5068281

Thank you very much!!

 

by: Prasanna_HebbarPosted on 2000-11-03 at 10:24:29ID: 5081701

chidu, if you are satisfied with the answer, you can award the points to the person whose answer was more helpful for you.

Let the experts gain some points.

 

by: girionisPosted on 2003-04-30 at 09:42:02ID: 8429571

No comment has been added lately, so it's time to clean up this TA.

I will leave a recommendation in the Cleanup topic area that this question is:

- points to Prasanna_Hebbar

Please leave any comments here within the
next seven days.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER !

girionis
Cleanup Volunteer

 

by: SpideyModPosted on 2003-05-15 at 19:36:14ID: 8537823

per recommendation

SpideyMod
Community Support Moderator @Experts Exchange

20120131-EE-VQP-002

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