Error Handling In Dos Batch
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Dos Script Error Handling
Sign up Batch Files - Error Handling up vote 34 down vote favorite 2 I'm currently writing my first batch file for deploying an asp.net solution. I've been Googling a bit for a general error handling approach and can't find anything really useful. Basically if any thing goes wrong I want to stop and print out what went wrong. Can anyone give dos batch error level me any pointers? batch-file share|improve this question edited Apr 29 '14 at 11:28 John Saunders 138k20175321 asked Jul 22 '09 at 9:15 bplus 2,87494574 add a comment| 5 Answers 5 active oldest votes up vote 34 down vote I generally find the conditional command concatenation operators much more convenient than ERRORLEVEL. yourCommand && ( echo yourCommand was successful ) || ( echo yourCommand failed ) There is one complication you should be aware of. The error branch will fire if the last command in the success branch raises an error. yourCommand && ( someCommandThatMayFail ) || ( echo This will fire if yourCommand or someCommandThatMayFail raises an error ) The fix is to insert a harmless command that is guaranteed to succeed at the end of the success branch. I like to use (call ), which does nothing except set the ERRORLEVEL to 0. There is a corollary (call) that does nothing except set the ERRORLEVEL to 1. yourCommand && ( someCommandThatMayFail (call ) ) || ( echo This can only fire if yourCommand raises an error ) See Foolproof way to check for no
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Windows Batch Error Handling
to the script in a .cmd file? For example, if I have: RENAME C:\MyDir\MyFile.txt MyFilexxx.txt And I get an
Bash Error Handling
error like "The system cannot find the file specified.", how do prevent it from executing the rest of the script in the cmd file and instead exit (somewhat) gracefully?Thanks,-Dave Friday, August http://stackoverflow.com/questions/1164049/batch-files-error-handling 21, 2009 12:57 AM Reply | Quote Answers 0 Sign in to vote RENAME C:\MyDir\MyFile.txt MyFilexxx.txt IF NOT %ERRORLEVEL% == 0 GOTO END REM here goes the rest of the script :END Marked as answer by dgolds Friday, August 21, 2009 3:34 PM Friday, August 21, 2009 5:53 AM Reply | Quote Microsoft is conducting an online survey to understand your opinion of https://social.technet.microsoft.com/Forums/scriptcenter/en-US/eca202a4-c8f3-40b6-a8b4-f4dad9682d55/add-simple-error-handling-to-cmd-file?forum=ITCG the Technet Web site. If you choose to participate, the online survey will be presented to you when you leave the Technet Web site.Would you like to participate? Privacy statement © 2016 Microsoft. All rights reserved.Newsletter|Contact Us|Privacy Statement|Terms of Use|Trademarks|Site Feedback TechNet Products IT Resources Downloads Training Support Products Windows Windows Server System Center Browser Office Office 365 Exchange Server SQL Server SharePoint Products Skype for Business See all products » Resources Evaluation Center Learning Resources Microsoft Tech Companion App Microsoft Technical Communities Microsoft Virtual Academy Script Center Server and Tools Blogs TechNet Blogs TechNet Flash Newsletter TechNet Gallery TechNet Library TechNet Magazine TechNet Subscriptions TechNet Video TechNet Wiki Windows Sysinternals Virtual Labs Solutions Networking Cloud and Datacenter Security Virtualization Updates Service Packs Security Bulletins Windows Update Trials Windows Server 2012 R2 System Center 2012 R2 Microsoft SQL Server 2014 SP1 Windows 8.1 Enterprise See all trials » Related Sites Microsoft Download Center TechNet Evaluation Center Drivers Windows Sysinternals TechNet Gallery Training Expert-led, virtual classes Training Catalog Class Locator Microsoft Virtual Academy Free Windows Server 2012 courses Free Windows 8 courses SQL Server trainin
don't make any sense. I'm sure they made perfect sense to me at the time. ;-) Wednesday, October 5, 2011 Common http://armillz.blogspot.com/2011/10/common-dos-batch-file-error-handling.html DOS batch file error handling mistakes I make I write a decent amount of batch scripts now days to automate things on windows server boxes. Unfortunately, I don't do it quite frequently http://www.robvanderwoude.com/errorlevel.php enough to remember all the crazy syntax of DOS commands. One of these errors is error handling. These are the things I commonly need to deal with. I found this page (and error handling site) very helpful for all DOS related stuff: http://www.robvanderwoude.com/errorlevel.php Use "IF %ERRORLEVEL% NEQ 0 SET MYERROR=1" to record whether the previous command resulted in an error code. Alternately, you can check for "IF ERRORLEVEL 1 ..." if you want to look for a specific error level. Be cautious of manipulations with ERRORLEVEL. It's not really an environment variable like other variables. In particular, do NOT dos batch error ever use "set ERRORLEVEL=5" or similar. It will corrupt any further use of %ERRORLEVEL% syntax by fixing it at a value. Use "CALL FOO.BAT" instead of just "FOO.BAT" when calling subscripts. Otherwise, when that script completes it will not return to the current script. Use "EXIT /B 1" to return an exit code from your script. If you use "EXIT 1" it will exit the entire command shell, including closing your current window if it's running in one. Consider using SETLOCAL and ENDLOCAL within your script to prevent temporary environment variables from carrying through to outer shells. Below is an example script. :: Sample script with some error handling SETLOCAL SET MYPARAM=%1 if "%MYPARAM%"=="" goto :USAGE CALL .\childscript.bat %MYPARAM% if %ERRORLEVEL% NEQ 0 set MYERROR=1 echo. echo Finished child script. Handling errors now... if %MYERROR%==1 GOTO :ERROR echo It worked! ENDLOCAL set SOME_EXTERNAL_VARIABLE=1 GOTO :EOF :USAGE echo Please provide a command line parameter. EXIT /B 2 :ERROR echo It didn't work, dude. EXIT /B 1 Update: I was wrong about the ERRORLEVEL syntax earlier, so I updated after some testing. Posted by Richard Mills at 10:01 AM Labels: DOS, windows No comments: Pos
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