FIND will generate an exit code of `0' if it is, `1' if it is not, and a code of `2' if a problem regarding the FIND command occurs. asked 6 years ago viewed 35848 times active 6 years ago Related 690How to pass command line parameters to a batch file?274Is there a command to refresh environment variables from the greveszTopic StarterStarter How to return success/failure from a batch file? « on: September 09, 2008, 02:31:33 PM » Hello,I am new to the DOS world. windows cmd dos return-code share|improve this question asked Mar 26 '10 at 8:07 Warpin 3,52773864 add a comment| 1 Answer 1 active oldest votes up vote 44 down vote accepted echo this contact form
SRS says: September 28, 2008 at 12:26 pm if /? Return Code Conventions By convention, command line execution should return zero when execution succeeds and non-zero when execution fails. Be aware that not everything presented here may work as shown for the commands included with the version or manufacturer of DOS you have. The conventional technique to check for a non-zero return code using the NEQ (Not-Equal-To) operator of the IF command: IF %ERRORLEVEL% NEQ 0 ( REM do something here to address the
A very helpful feature is the built-in DOS commands like ECHO, IF, and SET will preserve the existing value of %ERRORLEVEL%. Sure. If implemented well, the result will be achievement of a higher DOS Power-User status. EXIT without an ExitCode acts the same as goto:eof and will not alter the %ERRORLEVEL% You should never attempt to directly write to the %ERRORLEVEL% variable, (SET errorlevel...) instead use the
I have a program that returns -1 on errors). For example, you can test that an executable program or script is in your PATH by simply calling the program and checking for return code 9009. So "NATION.TXT" would always be printed no matter what. Cmd Set Errorlevel By default, the command processor will continue executing when an error is raised.
Here's a specific example: ::NATION.bat :: @ECHO OFF :FIND FIND "Canada" NATION.TXT IF ERRORLEVEL 2 GOTO PROBLEM IF ERRORLEVEL 1 GOTO END IF ERRORLEVEL 0 GOTO PRINT :PROBLEM ECHO A Problem Dos Errorlevel One program that can use all 256 codes is the "CHOICE" command. Database ECHO Esc: Exit Menu ECHO. http://steve-jansen.github.io/guides/windows-batch-scripting/part-3-return-codes.html my-e-space Web Hosting Advertisements & Offers 0 20-Apr-2006 14:48 functions seems not to exit from a certain code block jaro C Programming Language 3 22-Mar-2006 00:08 Network Sites: GIDNetwork · GIDApp
These codes are hidden from the user but may be tested for via various methods. Let's look closer at the CHOICE command. Batch File Exit Command How can I automatically center first search result? Batch File Exit Code 1 This was presumably because… The test for inequality is nice to have because the pseudo-environment-variable gives an easy test for equality: IF "%ERRORLEVEL%"=="%N%" Mathematically speaking, the two are equivalent, though; given
The same behavior can be seen with %CD%: If you did not explicitly set an environment variable called CD, then %CD% expands to the command processor's current directory. http://twaproductions.com/batch-file/bat-file-print-return-code.html Old Forum Search | Forum Rules Copyright © 2013 Computer Hope All rights reserved. Are all Code Numbers Utilised? What am I doing wrong?" Now, it does happen to be the case that if command extensions are enabled and you say %ERRORLEVEL%, then the command processor first looks for an Batch File Return Value
windows-xp batch share|improve this question asked Oct 1 '10 at 4:47 Misha Moroshko 1,73361729 1 Also asked on Stackoverflow: How do I get the application exit code from a Windows Sadly, even skilled Windows programmers overlook the importance of return codes. Comments are closed. http://twaproductions.com/batch-file/return-code-cmd-file.html Generally, the worse the error, the higher the number, or level, of the error.
This will only work if the inner FOR loop is contained in a separate subroutine, EXIT /b terminates the subroutine. Exit /b Errorlevel As already touched upon above, generally, no. IF %ERRORLEVEL% NEQ 0 EXIT /B %ERRORLEVEL% might be a better option.
SidewinderGuruThanked: 123 Experience: Familiar OS: Other Re: How to return success/failure from a batch file? « Reply #4 on: September 09, 2008, 06:12:06 PM » Quote from: fireballs on September 09, CMD.exe allows you to set it but then from that point on the variable is mostly meaningless. One might have a batch file perform an operation upon a file only if it contained a certain text string. Windows Exit Code So if the software has codes for various problems that might be encountered during a conversion, one could have the batch file automatically re-run itself using different command-line switches.
Take the DOS "FIND" command. Thus, tests are done in descending order. (Note that there is a way to do the tests in ascending order but it means much longer lines of code. Bash uses the variable $? http://twaproductions.com/batch-file/dos-batch-check-return-code.html I'll have to go back and fix it because the "greater than or equal to" behavior was expected but won't happen due to my mistake. [It's fine to rely on the
So why the difference? #4 24-Nov-2008, 19:37 dlp Member Join Date: May 2006 Posts: 157 Re: get a returned exit code in dos It appears that in older I just happened to have finished writing a batch script that was getting ready to go into production using the latter that worked simply because of the fall-back nature of the But you really need to know what the program returns on errors. And I still hate it.
A very helpful feature is the built-in DOS commands like ECHO, IF, and SET will preserve the existing value of %ERRORLEVEL%. Checking Return Codes In Your Script Commands The environmental variable %ERRORLEVEL% contains the return code of the last executed program or script. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Seems unfair that the microsoft tool gets fancy environment variable expansion, but the only API exposed does plain and ordinary expansion. (*) Really just the "Comments" section, not the entry itself.
Browse other questions tagged windows-xp batch or ask your own question. Batch files test for exit codes by looking at number levels. Use ‘exit', perhaps as ‘exit /b'. If quitting CMD.EXE, sets the process exit code with that number.