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Dos Errorlevel


But I'm digressing. Word Processor ECHO 2. See your manual or on-screen documentation. The first program/script must conform to the convention of returning 0 on success and non-0 on failure for this to work.

A very helpful feature is the built-in DOS commands like ECHO, IF, and SET will preserve the existing value of %ERRORLEVEL%. Related 15Exit batch file from subroutine0Program in batch file reading old version of newly altered file (XP)1How to determine the name of a file extracted from a zip archive via a To implement this, one uses the various exit code numbers within "Error Level" tests to determine the next operation. It's just a variable whose name happens to coincide with a command processor concept.

Dos Errorlevel

XCOPY, for instance can fail with errorlevels 1 to 5. Can a router send ARP requests to hosts? Too bad DOS doesn’t support constant values like Unix/Linux shells. It took me a little while to figure out that ERRORLEVEL wasn't a normal environment variable.

asked 6 years ago viewed 17732 times active 6 years ago Linked 487 How do I get the application exit code from a Windows command line? You would have specific instructions for each possible outcome that the program might present upon its completion. gives loads of info on this too. Echo Errorlevel Here's a good summary of the pitfalls and subtleties. –Nick Westgate Jun 17 '15 at 6:18 | show 1 more comment up vote 6 down vote This really works when you

share|improve this answer answered Mar 26 '10 at 8:16 Andras Vass 9,5662442 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Errorlevel Codes if you use Code: [Select]if errorlevel gtr 0 exit /b [1] anything over errorleve==1 would exit with exit code 1FB Logged Next time google it. The positive values are a good idea because other callers may use the IF ERRORLEVEL 1 syntax to check your script. check my site Bash uses the variable $?

rem this next command sets the error level to zero CMD /C EXIT 0 set ERRORLEVEL=1 if ERRORLEVEL 1 echo Does this print? Exit /b Errorlevel 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 Although most softwares give no exit codes or always one of `0' when they are terminated (ended) by the user, utilities often include a good range of exit codes. If there is a problem, the batch file branches to the "PROBLEM" section, places some text on the screen via ECHO commands and then ends.

Errorlevel Codes

if( !CreateProcess( NULL, // No module name (use command line) (LPTSTR)(strCmd.GetString()), // Command line NULL, // Process handle not inheritable NULL, // Thread handle not inheritable FALSE, // Set handle inheritance IF %ERRORLEVEL% NEQ 0 EXIT /B %ERRORLEVEL% might be a better option. Dos Errorlevel Method: In .bat: app2.exe if %ERRORLEVEL% GEQ 1 EXIT /B 1 This is a check after app2 for errorlevel. Windows Exit Code Look in your DOS manual or on-screen help, or do an Internet search.

The second means that FIND looked through the specified text but did not find the search string. View the documentation that accompanies each program to see if, and what, codes are available. It is not being presented here as it might potentially add confusion to this discussion.) Could You Give Another Example? Use ‘exit /?' for help. Batch File Exit Code 1

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. 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. current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. What would be a good choice for a controlled opposition?

Tags Code Comments (15) Tom says: September 26, 2008 at 10:06 am Oops. Return Value From Batch File Move the echo and exit to an else branch. –Samuel Mar 9 '15 at 23:27 Good point. If implemented well, the result will be achievement of a higher DOS Power-User status.

share|improve this answer answered Sep 29 '10 at 7:25 Adrian Faciu 7,85723054 add a comment| Not the answer you're looking for?

That sounds rediculous... #2 24-Nov-2008, 17:23 dlp Member Join Date: May 2006 Posts: 157 Re: get a returned exit code in dos You want %errorlevel%, not %errorcode%. I have written if errorlevel == 3 goto tag3 more times that i would like to. 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 Batch File Exit Code 0 Then there's no possibility of confusion, although anything which tries to use that environment variable will not work.

Why not just have an environment variable called %ERRORLEVEL% which is automatically updated to the error level whenever a command finishes running? Will Minecraft map items automatically update with terrain changes? Most programs rarely document every possible return code, so I’d rather explicity check for non-zero with the NEQ 0 style than assuming return codes will be 1 or greater on error. This type of compare ("%errorlevel%=="0") becomes dubious at best.B.bat can use the exit statement to pass a return code (errorlevel) back to a.bat.QuoteQuits the CMD.EXE program (command interpreter) or the current

Here's a simple "menu" batch file: :: MENU.bat :: @ECHO OFF :MENU ECHO MENU ECHO. Try it without them or try the other versions I added. –Dennis Williamson Oct 1 '10 at 5:24 Great, thanks a lot !! –Misha Moroshko Oct 1 '10 at If executed from outside a batch script, it will quit CMD.EXE exitCode specifies a numeric number. What is the structure in which people sit on the elephant called in English?

Why? Word that means "to fill the air with a bad smell"? There are also programs that use an exit code of zero to mean success and anything else to mean failure. In addition to this internal state, you can, if you A published paper stole my unpublished results from a science fair Was Judea as desertified 2000 years ago as it is now?

But you really need to know what the program returns on errors. This is rare for scripts intended for interactive use, but, it can be super helpful when writing scripts you support but you don’t have access to the target systems. @ECHO OFF Logged To every complex question there is a simple answer and it is wrong…- H.L. Each is one of 256 available values represented by a number from 0 (zero) through 255. `0' typically represents an operation that was completed with no errors.

Who knows why they made this value so difficult to get at this value. « Previous Thread | Next Thread » Thread Tools Show Printable Version Email this Page Search What is a good method for planting Ball and Burlap trees? 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. As you can see, using a program's exit codes allows batch files to make intelligent decisions to automatically direct a given program or do additional tasks based on a program's outcome.