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Capturing script output and input to log

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# 1  
Old 01-27-2011
Capturing script output and input to log
Hi
Is there a way that I can capture a shell script (both output and input) to a log file where I can analyze it?

Thanks
# 2  
Old 01-27-2011
The tee command will allow you to capture both input and output. For example, if you wanted to capture I/O for process XYZ in a pipeline use:


Code:
command1 | tee XYZ.in | XYZ -arg1 -arg2 | tee XYZ.out | command2

# 3  
Old 01-27-2011
If you have access to change the Shell script and it is written in a Bourne-like Shell (like ksh, bash etc.) you can capture as much as you want - including the command line used to call the script and any output. You can also trace all Shell commands executed.

Did you have an example script in mind?
# 4  
Old 01-27-2011
It is a script that I wrote (bourne) and I display list of foulder, create some files with specific content, export some database tables, etc.

How do I proceed? I tried using "tee -a" at the end of every line, but I find it very poor process for long script.
# 5  
Old 01-27-2011
Why not put tee on the invocation of the script (rather than updating the script and using tee -a on every line)? For example

Code:
$ myscript -arg1 -arg2 | tee output.log

# 6  
Old 01-27-2011
This will not work because I have menu and selection of steps, etc. Also, there are Yes/No answers for some of these steps :-(
# 7  
Old 01-27-2011
OK well best to edit your script and put the stuff you want to log in a function and pipe it to tee:

Code:
function display_menu
{
 ....
}
 
function doprocessing
{
   ....
}
 
# main code block
display_menu
...
doprocessing | tee output.log

or put your processing code between ( ) and redirect this output to tee ( ... ) | tee output.log

These are generic solutions and perhaps a simplified example of your script will help us to give a more specific solution.
Last edited by Chubler_XL; 01-27-2011 at 07:03 PM.. Reason: Syntax update - support bash or ksh
This User Gave Thanks to Chubler_XL For This Post:
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