Problem while redirecting script output to a file using java

[umapathy_sekar]

Hi All ,

I was trying to execute a unix shell script and redirect the output to a file in unix machine. When i execute the below command it is working fine


/root/umdhanas/New/hello.sh >> big.txt

But when i try to do the same using java program as below:

Runtime run=Runtime.getRuntime();
Process proc=run.exec("/root/umdhanas/New/hello.sh >> big.txt");

A file by the name big.txt does not get created and redirection does not happen . Please help me how to solve this

[umapathy_sekar]

Also please let me know how to get the process id of the script executed from java

[pbrockway2]

It is important to bear in mind that exec() does not interpret its string argument the same way a bash or other shell would. See, for example, the section "Runtime.exec() is not a command line" on page 4 of this JavaWorld article.

[Tolls]

And that article also, conveniently, tells you how to mimic this...if I remember correctly.

[Fubarable]

That has to be one of the most viewed Java articles ever. A classic.