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Dos Return Code


share|improve this answer edited Oct 1 '10 at 5:27 answered Oct 1 '10 at 4:58 Dennis Williamson 59.8k11107143 I tried your code. Is it possible to set a composite NOT NULL constraint in PostgreSQL How to tell my parents I want to marry my girlfriend Are the guns on a fighter jet fixed 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>retval.exe 1 D:\cprogs>echo %errorlevel% ECHO is on See what I Note that the left-pointing arrow ( <- ) in the "CHOICE" selection represents the "Escape" key on the keyboard. Source

In multitasking operating systems such as Unix or Linux, new processes can be created by active processes. The technique of spawning child processes is used to delegate some work to a child process when there is no reason to stop the execution of the parent. In DOS, this may be referred to as an errorlevel. Different tasks, same characters Word for disproportionate punishment?

Dos Errorlevel

This type of compare ("%errorlevel%=="0") becomes dubious at best.B.bat can use the exit statement to pass a return code (errorlevel) back to a.bat.QuoteQuits the CMD.EXE program (command interpreter) or the current alfpsNewbie Experience: Expert OS: Windows 7 Re: How to return success/failure from a batch file? « Reply #12 on: December 06, 2014, 08:01:33 AM » Quote from: grevesz on September 09, more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science It is used to search for a given text string.

  1. See also[edit] Return statement true and false (Unix) References[edit] ^ "Errorlevels".
  2. A very helpful feature is the built-in DOS commands like ECHO, IF, and SET will preserve the existing value of %ERRORLEVEL%.
  3. Well-written command-line software will present a range of exit codes.
  4. FIND will generate an exit code of `0' if it is, `1' if it is not, and a code of `2' if a problem regarding the FIND command occurs.
  5. up vote 55 down vote favorite 5 Inside a batch file on Windows, I use 7-zip like this: ...\right_path\7z a output_file_name.zip file_to_be_compressed How could I check the exit code of 7z
  6. As an example, if one uses a program that converts graphic formats and it incorporates exit codes, placing the conversion operation into a batch file would allow lines to be written
  7. Most shells use 128+N, while ksh93 uses 256+N.

What is this metal rail in the basement ceiling Can this number be written in (3^x) - 1 format? This automates a chore that used to see you having to answer questions or checking boxes every time you used the program. C language[edit] The C programming language allows programs exiting or returning from the main function to signal success or failure by returning an integer, or returning the macros EXIT_SUCCESS and EXIT_FAILURE. Errorlevel Codes Faqs.org.

asked 6 years ago viewed 97909 times active 3 years ago Linked 0 CMD - Successful or not indication? Batch File Exit Command In the waitid() system call, the child exit status and other information is no longer in a bitfield but in the structure siginfo_t, the W* macros do no longer apply. 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, Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply.

Error can indicate a bug in the executed software that causes stack overflow, leading to abnormal termination of the software.3221225725
-1073741571Stack overflow / exhaustion. Batch File Exit Code 0 Here's a simple "menu" batch file: :: MENU.bat :: @ECHO OFF :MENU ECHO MENU ECHO. Mencken fireballsApprentice Code:TerminalThanked: 3 Re: How to return success/failure from a batch file? « Reply #7 on: September 09, 2008, 06:57:18 PM » Quote from: Sidewinder on September 09, 2008, 06:51:56 Is there a simple way to do this?

Batch File Exit Command

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 The codes give the computer system an idea of what happened during an operation or after it has completed. Dos Errorlevel To execute a follow-on command after sucess, we use the && operator: SomeCommand.exe && ECHO SomeCommand.exe succeeded! Batch File Return Value Peruse the documentation that comes with each program to see if exit codes are given.

if /B is specified, sets ERRORLEVEL that number. this contact form Is it possible to set a composite NOT NULL constraint in PostgreSQL Is it OK to "pause" an advert in terms of SEO? Database ECHO Esc: Exit Menu ECHO. How to bevel only one end of a cylinder? Batch File Exit Code 1

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 Apart from the macros EXIT_SUCCESS and EXIT_FAILURE, the C standard does not define the meaning of return codes. With 256 choices, few commands or programs could ever fill up all the slots unless they became very involved. have a peek here INFORMATION BELOW MAY NOT BE REPRODUCED WITHOUT PERMISSION FROM THE AUTHOR © What are Exit Codes?

In addition, there are also those that are programmed to generate random, meaningless numbers upon completion. Windows Exit Code This webpage gives a short discussion of these codes and ways in which they might be used. This was touched upon with the "FC" example farther back.


share|improve this answer answered Mar 26 '10 at 8:16 Andras Vass 9,5962442 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google It isn’t always pretty, but, it gets the job done. They only generate one of these at a time but could eventually output all 256 numbers. Batch File Function Return Value if /B is specified, sets ERRORLEVEL that number.

Finally, "> NUL" is used to prevent any of CHOICE's messages or other prompts from appearing on screen. The exit status or return code of a process in computer programming is a small number passed from a child process (or callee) to a parent process (or caller) when it my-e-space Web Hosting Advertisements & Offers 0 20-Apr-2006 14:48 functions seems not to exit from a certain code block jaro C Programming Language 3 22-Mar-2006 00:08 Network Sites: GIDNetwork · GIDApp http://blackplanetsupport.com/batch-file/return-code-in-dos-command.html CPP / C++ / C Code:

 #include  int main(int argc, char * argv[]) { if(argc > 1) return 1; 

Since these are generated after a command has finished and exited, they are known as "Exit Codes". Word Processor ECHO 2. Return code (ERRORLEVEL): 0 WARNING: Reloaded COMMAND.COM transient I changed the program a bit: CPP / C++ / C Code:

int main(int argc, char * argv[]) You have to code for halting on error. 

Is there a simple way to do this? Why do the physical properties of an egg shell change when the egg shell is exposed to vinegar for a week? Other numbers might represent problems or various results. XCOPY, for instance can fail with errorlevels 1 to 5.

if /B is specified, sets ERRORLEVEL that number. One might have a batch file perform an operation upon a file only if it contained a certain text string. how to stop muting nearby strings or will my fingers reshape after some practice? How Do I find Out what Codes are Available?

They even vary from command version to version. IF %ERRORLEVEL% NEQ 0 EXIT /B %ERRORLEVEL% might be a better option. The full 32 bit exit code is only available with the waitid call, but not with older wait interfaces. 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

Rules for the use of return codes vary on different platforms (see the platform-specific sections).