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Hiding Output in Batch File Script

Posted on 2007-11-30
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From :
http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Windows/NT/Q_10698621.html?sfQueryTermInfo=1+batch+error+file+hide+script
I see how to hide the output in a batch file.
Do I need to add that code to each line for which I want to hide the output, or can I add it to one place in the script?  (For Win XP)
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Question by:NCHCIT
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usarian earned 1000 total points
ID: 20383989
ECHO OFF
{secret stuff}
ECHO ON
you can also use >> {filepath/filename}
to create a text file as a log.  That process also hides all output while the script is running.

OR

switch to vbscript/jscript
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by:NCHCIT
ID: 20384070
I've got ECHO OFF preceding all commands in the script, but it only hides the commands.  When I use an ATTRIB command on a directory, not wanting to change the attributes for hidden files, I get a ton of output for all hidden files whose attributes are not being changed, regardless of the ECHO OFF command.
Using >> (would that be considered a switch or command or something else?) took care of the job nicely.
Do I need to use that for every command whose output I want to hide?
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Expert Comment

by:Shift-3
ID: 20384086
To suppress both output and errors without creating a log file, append the following to each command:
> NUL 2>&1

Yes, you need to use it for each command whose output you want to hide.

See here for more information on redirection:
http://www.ss64.com/ntsyntax/redirection.html
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LVL 26

Expert Comment

by:Farhan Kazi
ID: 20384103
You can use DOS redirector with NUL keyword (or you can use file name to save output in it) to hide displaying any message on screen (with the end of every command that show output on screen)

Like:

CommandHere >NUL
:: Above >NUL statement will hide output of if command executes successfully.

CommandHere 2>NUL
:: Above 2>NUL statement will hide error message of if command fails

CommandHere 2>NUL >NUL
:: Above 2>NUL >NUL statement will hides both successful or error message.

Hope this helps!
Farhan
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Author Comment

by:NCHCIT
ID: 20384444
Thank you all!  This is great information.
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