topic Re: Script debug output in Operating System - HP-UX

Script debug output

sa2009 — Thu, 09 Jul 2009 11:48:32 GMT

Hello,

I have a script which generates error. I need to capture the output or the error in a debug mode using set -x. How to capture the error in a file in debug mode using set -x

Thanks & Regards

Re: Script debug output

James R. Ferguson — Thu, 09 Jul 2009 11:55:25 GMT

Hi:

Simply redirect STDERR to your file:

# sh -x ./myscript 2>mytrace

Regards!

...JRF...

Re: Script debug output

sa2009 — Thu, 09 Jul 2009 11:57:20 GMT

Hello,

Thanks for your reply. The script is called by some real time application and there is some issue with it. So we want to trace the script using set -x and capture the output in temporary file.

Please suggest.

Regards

Re: Script debug output

James R. Ferguson — Thu, 09 Jul 2009 12:06:40 GMT

Hi (again):

> The script is called by some real time application and there is some issue with it. So we want to trace the script using set -x and capture the output in temporary file.

The at the top of the script add the two lines shown below ('exec' and 'set'):

# cat ./thescript
#!/usr/bin/sh
exec 2>/var/tmp/errlog.$$
set -x
...

Your script will write it's trace to '/var/tmp/errlog' with the PID of the process appended for multiple runs or instances.

Regards!

...JRF...

Re: Script debug output

sa2009 — Thu, 09 Jul 2009 12:43:13 GMT

will it be stderr(2) or the stdout(1) that will give the relevant data.. please confirm.

Also, do we have to type in "set +x" at the end of the script.

Re: Script debug output

James R. Ferguson — Thu, 09 Jul 2009 12:52:48 GMT

Hi (again):

> will it be stderr(2) or the stdout(1) that will give the relevant data.. please confirm.

As I showed, if you want to capture the trace in a file, you need to redirect STDERR to that file.

> Also, do we have to type in "set +x" at the end of the script.

No, when your script exits, the setting ceases to matter. If you only want some particular section of your code traced, then you can bound it by 'set -x' and 'set +x' accordingly.

Regards!

...JRF...

Re: Script debug output

sa2009 — Thu, 09 Jul 2009 13:35:14 GMT

Thank You James. I appreciate your assistance in this issue.

Re: Script debug output

James R. Ferguson — Thu, 09 Jul 2009 13:37:38 GMT

Hi (again):

> Thank You James. I appreciate your assistance in this issue.

If you are satistied with the answers you have received, please read:

http://forums.itrc.hp.com/service/forums/helptips.do?#28

Assigning points is both a way of saying "thank you" and a way of showing future readers of your thread what helped you solve your problem.

Regards!

...JRF...