SomeFile.exe IF %ERRORLEVEL% EQU 9009 ( ECHO error - SomeFile.exe not found in your PATH ) It’s hard to know this stuff upfront – I generally just use trial and error What if that process hasn't exited yet? A very helpful feature is the built-in DOS commands like ECHO, IF, and SET will preserve the existing value of %ERRORLEVEL%. rem setlocal set dofoo=yes set i=0 :STARTLOOP if "%i%"=="17" goto EXITLOOP if "%ERRORLEVEL%"=="%n%" set dofoo=no set /a i = %i% + 1 goto STARTLOOP :EXITLOOP if "%dofoo%"=="yes" foo But as Andrew his comment is here
Do Matrix Multiplication! The general idea was this: CTTY NUL ECHO Echo whatever you want, it won't be displayed on screen no matter what. The message is not printed because the ERRORLEVEL environment variable has no effect on the error level. What you can't do is set the error level via "set ERRORLEVEL=…". other
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 CMD.exe allows you to set it but then from that point on the variable is mostly meaningless. It is not ok to use spaces in >> or 2> or 2>&1 or 1>&2 (before or after is ok).
To illustrate my story there are some examples you can try for yourself. Two tails in a row - what's the probability that the game started with a head? DIR>filename.txt and DIR>filename.txt are identical, ECHOHelloworld>filename.txt and ECHOHelloworld>filename.txt are not, even though they are both valid. Batch File Return Error Code To execute a follow-on command after sucess, we use the && operator: SomeCommand.exe && ECHO SomeCommand.exe succeeded!
Where are my downvotes? Batch File Redirect Output To File And Screen In Windows XP the result is no text on screen and file.txt containing the line Helloworld2, including the trailing "2" (CMD.EXE interprets it as ECHOHelloworld2>file.txt). And some, not many, commands send their output to the screen bypassing Standard Output and Standard Error, they use the Console. http://stackoverflow.com/questions/3452046/get-error-code-from-within-a-batch-file Not the answer you're looking for?
Logged gplApprentice Thanked: 27 Re: How to capture batch file error msg's? « Reply #3 on: May 11, 2010, 09:44:53 AM » Thank you for the confirmation of 2>> - I Batch File Log Output With Date share|improve this answer answered Apr 19 '13 at 5:07 Sam Jones 4741718 3 it could be even better if you returned the same error back to app1. Use 1>&2 to send text to Standard Error. Thanks. –Dlongnecker Aug 10 '10 at 21:24 2 Oh, for posterity, to make it stop on error, after :somethingbad, use a "pause" command –Dlongnecker Aug 11 '10 at 20:08 2
Use ‘exit', perhaps as ‘exit /b'. http://superuser.com/questions/194662/how-to-check-the-exit-code-of-the-last-command-in-batch-file I'm a software developer loving life in Charlotte, NC, an (ISC)2 CSSLP and an avid fan of Crossfit. Batch File Redirect Output To File You can also redirect to a printer with > PRN or >LPT1 Multiple commands on one line In a batch file the default behaviour is to read and expand variables one Batch File Logging Please login or register.Did you miss your activation email? 1 Hour 1 Day 1 Week 1 Month Forever Login with username, password and session length Forum only search News: Home
Next, run: test.bat 2> NUL and you should see: C:\>test.bat This text goes to Standard Output This text goes to the Console C:\>_ We redirected Standard Error to the NUL device, this content I also recommend documenting your possible return codes with easy to read SET statements at the top of your script file, like this: SET /A ERROR_HELP_SCREEN=1 SET /A ERROR_FILE_NOT_FOUND=2 Note that CMD Syntax TYPE - Display the contents of one or more text files Q245031 - Error when using the | pipe symbol Successive redirections explained (1>&3 ) - Stack Overflow Equivalent You can test the error level with the IF ERRORLEVEL command: IF ERRORLEVEL 1 ECHO error level is 1 or more
Display & Redirect Output On this page I'll try to explain how redirection works. But I'm digressing. share|improve this answer answered Aug 10 '10 at 18:20 Hellion 1,2481528 2 Also, since around Windows 2000, there's a "virtual" environment variable called %ERRORLEVEL% that can be tested with ==, http://objectdevcorp.com/batch-file/batch-file-output-error-stream.html Computer Hope Forum Main pageFree helpTipsDictionaryForumLinksContact Welcome, Guest.
Use ‘exit /?' for help. Redirect Batch File Output To Text File Maybe cmd.exe builtin set could set its exit value to the value passed in instead of setting the environment variable when the variable being set in is named ERRORLEVEL? but you need to catch that in the .bat and re-raise it to app1...
This was an issue I fought with a few months ago on an embedded system running DOS (real DOS, not CMD.EXE). for exactly this purpose, which no sane program would try to use as its own environment variable. [You gave the answer yourself: "Anything which tries to use that environment variable will SomeCommand.exe || EXIT /B 1 A simliar technique uses the implicit GOTO label called :EOF (End-Of-File). Batch File Output To Text File With Timestamp only if myProgram.exe returned with error level 0.
The result will be an empty logfile. Warning messages typically don’t effect the return code. This is a fine demonstration of only Standard Output being redirected to the NUL device, but Standard Error still being displayed. http://objectdevcorp.com/batch-file/batch-file-output-error-message.html gives loads of info on this too.
Sometimes the lines can be padded with spaces to align all redirection signs and make the batch file more readable. By default, the command processor will continue executing when an error is raised. With the NUL device that's no problem, but when redirecting to a file one of the redirections will lock the file for the other redirection. asked 6 years ago viewed 96019 times active 3 years ago Blog How We Make Money at Stack Overflow: 2016 Edition Visit Chat Linked 0 CMD - Successful or not indication?
A workaround that may look a bit intimidating is grouping the command line and escaping the redirection: START CMD.EXE /C ^(command ^> logfile^) What this does is turn the part between What matters is did the script work or not? Trying start /wait didn't work. Unfortunately, it can be done only in the old MS-DOS versions that came with a CTTY command.
SRS says: September 28, 2008 at 12:26 pm if /? Some notes on this subject can be found on my Temporary Files page.