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Dos Cmd Return Code


Since these codes can indicate what happened during a computer operation, they can be used in a batch file to tailor the direction of further procedures. and this will return TRUE for every non-zero return code. 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 Or is it necessary to write an exe // return-a-number.exe int main (int argc, LPCSTR argv[]) { return argc ? navigate here

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 It seems like the MS-DOS internal commands do not return an error code. Arabian vs. Dial knob in hotel bathroom How to typeset a system of linear equations in LaTeX?

Batch File Exit Command

START with /WAIT option 19 ERRORLEVEL inside IF 7 How can I set the exit code in Inno Setup? 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. Checking Return Codes In Your Script Commands The environmental variable %ERRORLEVEL% contains the return code of the last executed program or script. Move the echo and exit to an else branch. –Samuel Mar 9 '15 at 23:27 Good point.

This is because "IF ERRORLEVEL" does not just mean if the exit code is `n' number, it actually means if it is `n' number or higher. It took me a little while to figure out that ERRORLEVEL wasn't a normal environment variable. So as an example, if one used the "FC" (File Compare) command and the outcome was that two files matched, a further procedure could be that the batch file be directed Errorlevel Codes If /B is specified, sets ERRORLEVEL that number.

For What Purposes Can Exit Codes be Used? A non zero value usually indicates an error." To test for specific error levels in batch files, you may find this knowledgebase article useful. set BANKBALANCE=$1,000,000.00 "Hey, when I tried to withdraw the money, I got an insufficient funds error. http://stackoverflow.com/questions/334879/how-do-i-get-the-application-exit-code-from-a-windows-command-line They even vary from command version to version.

Contact Failed Mail Donate Errorlevels The correct name for errorlevels would be return codes. Batch Set Errorlevel for details. Happened when checking %ERRORLEVEL% in a cmd file. Yes.

Dos Errorlevel

SidewinderGuruThanked: 123 Experience: Familiar OS: Other Re: How to return success/failure from a batch file? « Reply #6 on: September 09, 2008, 06:51:56 PM » Quoteexit requires that you use the his explanation A very helpful feature is the built-in DOS commands like ECHO, IF, and SET will preserve the existing value of %ERRORLEVEL%. Batch File Exit Command When DOS or its software finishes a command operation, it usually generates a code upon exiting. Return Value From Batch File If you file a change-of-address form for yourself, that doesn't affect packages sent to your neighbor.

If we need to check every errorlevel, though, there are better alternatives. http://sammcallister.com/batch-file/dos-shell-error-code.html If quitting CMD.EXE, sets the process exit code with that number. 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 Is there a mean-value theorem for volume integrals? Batch File Exit Code 1

The codes give the computer system an idea of what happened during an operation or after it has completed. A solution to do it in C++ looks like below: #include "stdafx.h" #include "windows.h" #include "stdio.h" #include "tchar.h" #include "stdio.h" #include "shellapi.h" int _tmain( int argc, TCHAR *argv[] ) { CString CHOICE /C:123<- /N > NUL IF ERRORLEVEL 4 GOTO END IF ERRORLEVEL 3 GOTO DATABASE IF ERRORLEVEL 2 GOTO SPREADSHEET IF ERRORLEVEL 1 GOTO WORD-PROCESSOR GOTO END :WORD-PROCESSOR (start word processor his comment is here So i created a little bash script to take care of this.

So you can include the error level in a log file: ECHO error level is %ERRORLEVEL%>logfile

So you can perform other types of tests against the error level, for example, to Exit /b Errorlevel A certain errorlevel may mean anything the programmer wanted it to. In DOS for the rest of us, we can use FOR loops to determine the errorlevel: @ECHO OFF REM Reset variables FOR %%A IN (1 10 100) DO SET ERR%%A= REM

Remember, this is duct tape programming.

You would have specific instructions for each possible outcome that the program might present upon its completion. Despite the term "exit codes", "ERRORLEVEL" is used for the tests. The message is not printed because the ERRORLEVEL environment variable has no effect on the error level. Windows Errorlevel Codes WaitForSingleObject( pi.hProcess, INFINITE ); int result = -1; if(!GetExitCodeProcess(pi.hProcess,(LPDWORD)&result)) { printf("GetExitCodeProcess() failed (%d)\n", GetLastError() ); } else printf("The exit code for '%ws' is %d\n",(LPTSTR)(strCmd.GetString()), result ); // Close process and thread

In the case of an infinite loop, this EXIT /b behaviour will cause the script to hang until manually terminated with Ctrl + C Exiting nested FOR loops, if EXIT /b To check errorlevels during batch file development, use either COMMAND/Zyourbatch.bat to display the errorlevel of every command executed in MS-DOS 7.* (Windows 95/98), or PROMPTErrorlevel$Q$R$_$P$G in OS/2 Warp (DOS) sessions. Setting errorlevels MS-DOS & Windows 9x: Use ERRORLVL.EXE from OzWoz Software, or SETERLEV.COM 1.0 from Jim Elliott to test batch files that (are supposed to) check on errorlevels. weblink It's a fallback step, in the same way that your neighbor is a fallback delivery location if you aren't home.

See "if /?". Browse other questions tagged batch-file dos ms-dos windows-scripting or ask your own question.