running unix command from java

[madhu_sharan]

Hi All,

I have been struggling for a week trying to run a unix command from my java program.

the unix command is = ssh dmdev3@tsapid01-zt3d01 ':> /t3/envs/dmdev3/test/file_list.txt'
when i try to run this command directly on my unix console, it works perfectly.

but when i try it form my JAVA program, i get the below mentioned error

ksh: :> /t3/envs/dmdev3/test/file_list.txt: not found


:(:(:(

below is my java code snippet that i use,

procTemp=runEnv.exec(strShellCmd);

where strShellCmd contains the entire unix command as a single string


requiring your help at the earliest cause i'm in such a desperate situation.

Thanks in advance,
Madhu.

[kammce]

Have you tried using this line of code? :

 Process child = Runtime.getRuntime().exec(command);

If you do not know how to use this properly, a quick google search will provide you with a bunch of examples of how to use this.

This site had a good one as well.
Running system commands in Java applications | java exec example | devdaily.com

I would try to execute you command, but I would not want to access your ssh server.

[madhu_sharan]

Have you tried using this line of code? :

 Process child = Runtime.getRuntime().exec(command);

If you do not know how to use this properly, a quick google search will provide you with a bunch of examples of how to use this.

This site had a good one as well.
Running system commands in Java applications | java exec example | devdaily.com

I would try to execute you command, but I would not want to access your ssh server.

I found out the solution.

initially i used

ProcessBuilder procBuild=new ProcessBuilder(strShellCmd);

but when i used

ProcessBuilder procBuild=new ProcessBuilder("bash","-c",strShellCmd);

it worked :)

thanks for your help,
Madhu.

[Tolls]

Have you tried using this line of code? :

 Process child = Runtime.getRuntime().exec(command);

I'm guessing that is the equivalent of the line the OP has given, where runEnv is the Runtime and procTemp is a Process.

For the OP all I can suggest is going through this article at JavaWorld which covers a lot of things you need to know about how Runtime exec() works (and sometimes doesn't).