extracting required string from routine return value

ssunda6 · Post by **ssunda6** » Thu Jun 07, 2007 3:15 am

Hi,

I am executing a shell script which returns value 0 or 1 based on some conditions, using DSExecute function in a routine(transform function)

Ans=Output<1> worked fine and i got the required output.

Because of some error in the script, the script is now returning some error statements along with the return code(0/1) that I want. But I want only the last value (either 0/1) returned from the script whether it executes successfully or not.

How can I extract only the return value from the dynamic output.

Regards,
ssunda

ssunda6 · Post by **ssunda6** » Thu Jun 07, 2007 3:25 am

Hi,

Forgot providing example of output from the script.

When we got error, the output was as follows:

tail: cannot open input
error: No such file or directory on file /opt/ofa/logs/tgt_testA.log
1

I can get the last line of output using
Ans=Output<3> . But next time if the error differs, and i have 4 lines of error, then this will not work.

Any inputs will be helpful.
Thnx,
ssunda.

chulett · Post by **chulett** » Thu Jun 07, 2007 6:43 am

If you truly don't want to see them, redirect standard error to /dev/null when you launch your script. Or use DCount to count the output and take the last one.

ray.wurlod · Post by **ray.wurlod** » Fri Jun 08, 2007 1:23 am

Code: Select all

Ans = Field(Output, @FM, Count(Output,@FM) + 1, 1)

It appears that DCount() can not be used in this syntax.

chulett · Post by **chulett** » Fri Jun 08, 2007 6:32 am

But Count can, it seems... yes?

ssunda6 · Post by **ssunda6** » Fri Jun 08, 2007 7:13 am

Hi Chullet, Ray

I tried both options : Count function and redirecting error messages to some file or /dev/null

Both of them are not working.
Redirecting output is not working some times. When I had an error of missing some files, it redirected all error messages except one message .

I tried using the following code in my routine :
Ans = Field(Output, @FM, Count(Output,@FM) + 1, 1)

But it is not returning anything.

Regards,
ssunda.

ray.wurlod · Post by **ray.wurlod** » Fri Jun 08, 2007 8:23 am

Because you posted in the server forum, you got answers that will work in server jobs.

ssunda6 · Post by **ssunda6** » Sun Jun 10, 2007 10:14 pm

I have posted the topic in parallel forum

Regards,
ssunda.

chulett · Post by **chulett** » Mon Jun 11, 2007 7:08 am

What's parallel got to do with any of this? We are discussing a BASIC routine for goodness sake. I know you've got yourself a 'solution' but it's overly complex and it can be easily handled in other ways as mentioned here.

If you want to pursue this we can. The count and redirection do work.

ssunda6 · Post by **ssunda6** » Thu Jun 14, 2007 7:46 am

Hi,

Ans = Field(Output,@FM,Count(Output,@FM),1) is returning the required value of output.

Count(Output,@FM)+1 is giving an empty line. I think a new line is there in the output of the script.

Thanks for the replies.

ray.wurlod · Post by **ray.wurlod** » Thu Jun 14, 2007 3:05 pm

There is usually a line terminator at the end of the output of each operating system command. It's this that puts the cursor on the next line when output is to screen.

ssunda6 · Post by **ssunda6** » Thu Jun 14, 2007 10:52 pm

ok. Thanx a lot.

Regards,
ssunda.