Dos Error Handling
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Dos Errorlevel
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Join them; it only takes a minute: Sign up Batch Files - Error Handling up vote 34 down vote favorite 2 I'm currently writing my first batch file for deploying an asp.net solution. I've been Googling a bit for a general error handling approach and can't find anything really useful. Basically if any thing goes wrong I want dos error 64 to stop and print out what went wrong. Can anyone give me any pointers? batch-file share|improve this question edited Apr 29 '14 at 11:28 John Saunders 138k20175321 asked Jul 22 '09 at 9:15 bplus 2,87494574 add a comment| 5 Answers 5 active oldest votes up vote 34 down vote I generally find the conditional command concatenation operators much more convenient than ERRORLEVEL. yourCommand && ( echo yourCommand was successful ) || ( echo yourCommand failed ) There is one complication you should be aware of. The error branch will fire if the last command in the success branch raises an error. 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 succeed at the end of the success branch. I like to use (call ), which does nothing except set the ERRORLEVEL to 0. There is a corollary (call) that does nothing except set the ERRORLEVEL to 1. yourCommand && ( someCommandThatMayFail (
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Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, dos error code 1 helping each other. Join them; it only takes a minute: Sign up Batch Programming, Error Handling, and Start Command up vote 6 down vote favorite I am just starting to learn how to script. I'm trying to understand http://stackoverflow.com/questions/1164049/batch-files-error-handling how the system handles Error Levels and how they can be used in error handling. I know there is a difference between the environment variable %ERRORLEVEL% and the Error Level of the system. If I understand this correctly, then the If ERRORLEVEL 1 code would check the environment variable before it checks the error level of the previous command. So, in my program I am trying to interface a startup/stop script that will start/stop all scripts http://stackoverflow.com/questions/6498460/batch-programming-error-handling-and-start-command of a given machine (for testing I'm just using one application notepad.exe as an example). I have two wrapper scripts that will either start up or stop the applications by passing arguments to the independent script. If there is an error in the independent script, it will set the errorlevel using the EXIT /B n command. Once control is returned to the calling script, it will go to an error handling script if the exit status is non-zero. At first I was setting the %ERRORLEVEL% to zero manually and then testing for an error after a START or TASKKILL command. But then I read that clearing %ERRORLEVEL% with SET ERRORLEVEL= is a better method. My issue comes in when I try to start the app with START "" notepad.exe Whenever I test the errorlevel after this command it is always greater than or equal to 1 unless I use SET ERRORLEVEL=0 before I run the start command. I have inserted the code for the four scripts below. Any insight and advice would be greatly appreciated. appstart.bat: @echo off :: Script for application Start set ERRORLEVEL= :: **** :: Additional Batch files will be executed from within this file :: Example: :: Call Appbat01.bat :: The called batch file should set ERRORLEVEL non-zero if error :: **** call test.bat -start if ERRORLEVEL 1 (call error.bat) echo. echo
File not found 03 Path not found 04 Too many open files (no handles left) 05 Access denied 06 Invalid handle 07 http://stanislavs.org/helppc/dos_error_codes.html Memory control blocks destroyed 08 Insufficient memory 09 Invalid memory block address 0A http://armillz.blogspot.com/2011/10/common-dos-batch-file-error-handling.html Invalid environment 0B Invalid format 0C Invalid access mode (open mode is invalid) 0D Invalid data 0E Reserved 0F Invalid drive specified 10 Attempt to remove current directory 11 Not same device 12 No more files 13 Attempt to write on a write-protected diskette 14 Unknown unit 15 Drive not ready 16 dos error Unknown command 17 CRC error 18 Bad request structure length 19 Seek error 1A Unknown media type 1B Sector not found 1C Printer out of paper 1D Write fault 1E Read fault 1F General failure 20 Sharing violation 21 Lock violation 22 Invalid disk change 23 FCB unavailable 24 Sharing buffer overflow 25 Reserved 26 Unable to complete file operation (DOS 4.x) 27-31 Reserved dos error handling 32 Network request not supported 33 Remote computer not listening 34 Duplicate name on network 35 Network name not found 36 Network busy 37 Network device no longer exists 38 NetBIOS command limit exceeded 39 Network adapter error 3A Incorrect network response 3B Unexpected network error 3C Incompatible remote adapter 3D Print queue full 3E No space for print file 3F Print file deleted 40 Network name deleted 41 Access denied 42 Network device type incorrect 43 Network name not found 44 Network name limit exceeded 45 NetBIOS session limit exceeded 46 Temporarily paused 47 Network request not accepted 48 Print or disk redirection is paused 49-4F Reserved 50 File already exists 51 Reserved 52 Cannot make directory entry 53 Fail on INT 24 54 Too many redirections 55 Duplicate redirection 56 Invalid password 57 Invalid parameter 58 Network device fault 59 Function not supported by network (DOS 4.x) 5A Required system component not installed (DOS 4.x) DOS Error Code/Classes Error Classes 01 Out of resource, out of space, channel, etc 02 Temporary situation, not an error, ex: file lock 03 Authorization, permission denied 04 Internal, system detected internal error 05 Hardwar
don't make any sense. I'm sure they made perfect sense to me at the time. ;-) Wednesday, October 5, 2011 Common DOS batch file error handling mistakes I make I write a decent amount of batch scripts now days to automate things on windows server boxes. Unfortunately, I don't do it quite frequently enough to remember all the crazy syntax of DOS commands. One of these errors is error handling. These are the things I commonly need to deal with. I found this page (and site) very helpful for all DOS related stuff: http://www.robvanderwoude.com/errorlevel.php Use "IF %ERRORLEVEL% NEQ 0 SET MYERROR=1" to record whether the previous command resulted in an error code. Alternately, you can check for "IF ERRORLEVEL 1 ..." if you want to look for a specific error level. Be cautious of manipulations with ERRORLEVEL. It's not really an environment variable like other variables. In particular, do NOT ever use "set ERRORLEVEL=5" or similar. It will corrupt any further use of %ERRORLEVEL% syntax by fixing it at a value. Use "CALL FOO.BAT" instead of just "FOO.BAT" when calling subscripts. Otherwise, when that script completes it will not return to the current script. Use "EXIT /B 1" to return an exit code from your script. If you use "EXIT 1" it will exit the entire command shell, including closing your current window if it's running in one. Consider using SETLOCAL and ENDLOCAL within your script to prevent temporary environment variables from carrying through to outer shells. Below is an example script. :: Sample script with some error handling SETLOCAL SET MYPARAM=%1 if "%MYPARAM%"=="" goto :USAGE CALL .\childscript.bat %MYPARAM% if %ERRORLEVEL% NEQ 0 set MYERROR=1 echo. echo Finished child script. Handling errors now... if %MYERROR%==1 GOTO :ERROR echo It worked! ENDLOCAL set SOME_EXTERNAL_VARIABLE=1 GOTO :EOF :USAGE echo Please provide a command line parameter. EXIT /B 2 :ERROR echo It didn't work, dude. EXIT /B 1 Update: I was wrong about the ERRORLEVEL syntax earlier, so I updated after some testing. Posted by Richard Mills at 10:01 AM Labels: DOS, windows No comments: Post a Comment Newer Post Older Post Home Subscribe to: Post Comments (Atom) Followers Blog Archive ► 2013 (1) ► November (1) ► 2012 (9) ► November (1) ► October (2) ► September (1) ► July (1) ► June (3) ► January (1) ▼ 2011 (17) ► December (1) ► November (1) ▼ October (4) Repairing