Check Error Code Dos
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stdin, stdout, stderr Part 5 – If/Then Conditionals Part 6 – Loops Part 7 – Functions Part 8 – Parsing Input Part dos error code 9009 9 – Logging Part 10 – Advanced Tricks Today we’ll cover return
Dos Error Code 128
codes as the right way to communicate the outcome of your script’s execution to the world. Sadly, even skilled dos error code 255 Windows programmers overlook the importance of return codes. Return Code Conventions By convention, command line execution should return zero when execution succeeds and non-zero when execution fails. Warning messages typically don’t dos error code 1 effect the return code. What matters is did the script work or not? Checking Return Codes In Your Script Commands The environmental variable %ERRORLEVEL% contains the return code of the last executed program or script. A very helpful feature is the built-in DOS commands like ECHO, IF, and SET will preserve the existing value of %ERRORLEVEL%. The conventional technique to check for
Dos Error Codes List
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 error ) Another common technique is: IF ERRORLEVEL 1 ( REM do something here to address the error ) The ERRORLEVEL 1 statement is true when the return code is any number equal to or greater than 1. However, I don’t use this technique because programs can return negative numbers as well as positive numbers. 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. You may also want to check for specific error codes. 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. 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 to figure out the best wa
File not found 03 Path not found 04 Too many open files (no handles left) 05 Access denied 06 dos beep codes Invalid handle 07 Memory control blocks destroyed 08 Insufficient memory 09 Invalid unix error code memory block address 0A Invalid environment 0B Invalid format 0C Invalid access mode (open mode is invalid) 0D Invalid
Windows Error Code
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 http://steve-jansen.github.io/guides/windows-batch-scripting/part-3-return-codes.html Unknown unit 15 Drive not ready 16 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 http://stanislavs.org/helppc/dos_error_codes.html Unable to complete file operation (DOS 4.x) 27-31 Reserved 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 Tempor
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Tools Search this Thread Rate Thread #1 24-Nov-2008, 11:58 Howard_L Senior Member Join Date: Apr 2007 Location: Maryland/PA, USA Posts: 1,007 Get a returned exit code in DOS I have another dumb question. In linux we can do this: Code: echo $? to view what the last process returned as an exit code. How can I do the same in a msdos console? example Code: [myprompt]$ cat 081124_returnval-1.c #include #include
Command line: Code: C:\Codes\C_CPP\Blah>main.exe C:\Codes\C_CPP\Blah>echo %errorlevel% 0 C:\Codes\C_CPP\Blah>main.exe 1 C:\Codes\C_CPP\Blah>echo %errorlevel% 1 #3 24-Nov-2008, 18:43 Howard_L Senior Member Join Date: Apr 2007 Location: Maryland/PA, USA Posts: 1,007 Re: get a returned exit code in dos right, %errorlevel% , but mine does not work the same as yours. Using the code you posted above and named retval.c / retval.exe I get this: Code: D:\cprogs>retval.exe D:\cprogs>echo %errorlevel% ECHO is on D:\cprogs>r