SRS says: September 28, 2008 at 12:26 pm if /? Even better, I can repeatedly call the bitwise OR with the same error code and still interpret which errors were raised. << Part 2 – Variables Part 4 – stdin, stdout, rem TASK 1: using only rem if ERRORLEVEL n rem simulate rem if "%ERRORLEVEL%"=="%n%" rem … specifically, execute command foo under the specific condition rem that the A safer way to redirect STARTed commands' output would be to create and run a "wrapper" batch file that handles the redirection. weblink
How far above a waterfall should you be to safely cross? 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 if … return-a-number 17 Maurits [MSFT] says: September 26, 2008 at 5:12 pm Actually reading the post, it appears CMD /C EXIT 17 works. Old Forum Search | Forum Rules Copyright © 2013 Computer Hope All rights reserved.
Uh oh, something bad happened exit /b 1 ) Or to give more info about what happened c:\mypath\myexe.exe 2&1> myexe.log find "Invalid File" "myexe.log" >nul2>nul && echo.Invalid File error in Myexe.exe Follow UsNews Holy cow, I wrote a book Basics Archives Ground Rules Suggestion Box Contact Me Disclaimers and such CategoriesCode Non-Computer Other History Tips/Support Microspeak Dream email News flash Time The The > operator sends, or redirects, stdout or stderr to another file.
Being able to do caputer the dos system messages will go a long way in helping me to debug this batch file when it's run from scheduled tasks while the user Disconnect all previous connections to the
server or shared resource and try again..Here is what I get in the Logfile:Code: [Select]------------------------------------------------
-- Batch Ran on Tue 05/11/2010 at 8:57:05.97 --
eddie says: September 27, 2008 at 8:14 am you know, Go To Statement Considered Harmful. Redirect Console Output To File Windows Panthers_DenTopic StarterRookie Re: How to capture batch file error msg's? « Reply #6 on: May 12, 2010, 05:40:15 AM » Quote from: BC_Programmer on May 11, 2010, 08:24:32 PMprogram.exe 2>&1 | This could be useful when prompting for input even if the batch file's output is being redirected to a file. http://stackoverflow.com/questions/1164049/batch-files-error-handling But the next one is new: test.bat > NUL 2>&1 and you should see: C:\>test.bat This text goes to the Console C:\>_ This time we redirected both Standard Output and Standard
But ERRORLEVEL is not the only recourse for batch - see my answer –dbenham Jun 13 '13 at 11:30 add a comment| up vote 2 down vote A successful ping on Batch File Output To Text File Append Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Redirecting Standard Error in "true" MS-DOS (COMMAND.COM) isn't possible (actually it is, by using the CTTY command, but that would redirect all output including Console, and input, including keyboard). Success!
Panthers_DenTopic StarterRookie How to capture batch file error msg's? « on: May 11, 2010, 08:32:15 AM » So in my batch file, I can capture the errorlevel (the error number), but http://www.computerhope.com/forum/index.php?topic=104561.0 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 Batch File Output To Text File A very simple way to halt on error is to use the EXIT command with the /B switch (to exit the current batch script context, and not the command prompt process). Batch File Logging Can anyone give me any pointers?
A common technique is to use > to create/overwrite a log file, then use >> subsequently to append to the log file. have a peek at these guys 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. What you can't do is set the error level via "set ERRORLEVEL=…". Remember, this is duct tape programming. Batch File Display Message
That would be a neat trick. (I would guess the number of programs that would be broken by the change would be quite near zero.) [I would not be surprised if variable at all. 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 check over here Use ‘exit', perhaps as ‘exit /b'.
But when anything goes wrong it exits and continues the script inside the first file. Batch File Log Output With Date But, as with FRED, that variable won't have any effect on the error level. Which current networking protocol would be the optimal choice for very small FTL bandwidth?
Marty says: September 27, 2008 at 11:34 am A god safety net is to reset ERRORLEVEL each time you use it, similar to the SetLAstError() function. I like to use (call ), which does nothing except set the ERRORLEVEL to 0. The “Standard Out” file, known as stdout, is used to write output for display on the screen. Cmd Redirect Output To File You can test the error level with the IF ERRORLEVEL command: IF ERRORLEVEL 1 ECHO error level is 1 or more
setlocal set dofoo=no if ERRORLEVEL 17 set dofoo=yes if ERRORLEVEL 18 set dofoo=no if "%dofoo%"=="yes" foo rem TASK 2: using only rem if "%ERRORLEVEL%"=="%n%" rem simulate rem SomeCommand.exe || GOTO :EOF Tips and Tricks for Return Codes I recommend sticking to zero for success and return codes that are positive values for DOS batch files. This can be useful for error messages. this content 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
When you are done typing, hit CTRL+Z, which sends the end-of-file (EOF) character. Why not just have an environment variable called %ERRORLEVEL% which is automatically updated to the error level whenever a command finishes running? Real valued polynomial has real coefficients Two tails in a row - what's the probability that the game started with a head? Before posting on our computer help forum, you must register.
Where are my downvotes? Here is an example of emulating the Unix command sleep by calling ping against the loopback address. We'll see how we can use this later. In Windows NT4 and later (CMD.EXE) and in OS/2 (also CMD.EXE) Standard Error can be redirected by using 2> instead of > A short demonstration.
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 Comments are closed. set result=0 find /I "whatever" temp.txt set result=%ERRORLEVEL% REM Now do a bunch of IF statements based on the error level value, but checking %ERRORLEVEL%, some of which would set a Do paper books exist in the 5th ed.
Make loop more efficient Meaning of '2> >(command)' Redirection in Bash Conditional permutation of combining multiple lists What did I try to do to you? That is what you see on screen as normal messages, 2> or 2>> will output error messages.1 is the standard output stream.2 is the standard error stream.>,>> , <, and | asked 6 years ago viewed 96019 times active 3 years ago Blog How We Make Money at Stack Overflow: 2016 Edition Linked 0 CMD - Successful or not indication? In this case, we could also have used test.bat>NUL2>NUL This redirects Standard Output to the NUL device and Standard Error to the same NUL device.
Logged SidewinderGuruThanked: 123 Experience: Familiar OS: Other Re: How to capture batch file error msg's? « Reply #7 on: May 12, 2010, 10:30:41 AM » Quote from: Panthers_Den on May 12, Trying start /wait didn't work. rem this next command sets the error level to zero CMD /C EXIT 0 set ERRORLEVEL=1 if ERRORLEVEL 1 echo Does this print?