Remember, this is duct tape programming. I use this technique heavily to halt a script when any error is encountered. By default, the command processor will continue executing when an error is raised. You have to code for halting on error. We also pass a specific non-zero return code from the failed command to inform the caller of our script about the failure.
Jumping to EOF in this way will exit your current script with the return code of 1. I recommend sticking to zero for success and return codes that are positive values for DOS batch files. The prefixing helps the end user by knowing the output is from the script and not another program being called by the script. It may sound silly until you spend hours trying to track down an obtuse error message generated by a script. Trust me, you want command processor extensions.
I use this variable to make fully qualified filepaths to any other files in the same directory as our script. Variable Declaration DOS does not require declaration of variables. Listing Existing Variables The SET command with no arguments will list all variables for the current command prompt session. Variable Scope Global vs Local By default, variables are global to your entire command prompt session. Special Variables There are a few special situations where variables work a bit differently.
Command Line Arguments to Your Script You can read the command line arguments passed to your script using a special syntax. Tricks with Command Line Arguments Command Line Arguments also support some really useful optional syntax to run quasi-macros on command line arguments that are file paths. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog.
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