By default command extensions are enabled. Please read the Best Practices section on command line input validation. This tip dates back to way before the Windows NT era.
In CMD. It can be solved with reading from a temporary file a remarked version of the parameter. Then reading the rem parameter output from the file, but carefully. After removing the extra characters in param1 , you got it.
The "pause" displays what the batch file has done and waits for you to hit the ANY key. Save that as xx. This batch file takes care of all the necessary parameters, like copying only files, that are newer, etc. I have used it since before Windows. If you like seeing the names of the files, as they are being copied, leave out the Q parameter.
A friend was asking me about this subject recently, so I thought I'd post how I handle command-line arguments in batch files. This technique has a bit of overhead as you'll see, but it makes my batch files very easy to understand and quick to implement.
As well as supporting the following structures:. The jist of it is having the :init , :parse , and :main functions. It won't modify the original parameters because the function is being call ed with a copy of the original parameters.
Everyone has answered with really complex responses, however it is actually really simple. This can be very useful for certain variables in a script, such as a name and age.
So, if I have a script like this:. Inspired by an answer elsewhere by Jon, I have crafted a more general algorithm for extracting named parameters, optional values, and switches. Let us say that we want to implement a utility foobar. It requires an initial command. It has an optional parameter --foo which takes an optional value which cannot be another parameter, of course ; if the value is missing it defaults to default.
It also has an optional parameter --bar which takes a required value. Lastly it can take a flag --baz with no value allowed. Oh, and these parameters can come in any order. Then place the batch file in, let's say, the system32 folder, go to your Java class file, right click, Properties, Open with Its not just simple to write but its simple to maintain as well so if later some other person or you read your script after long period of time, it will be easy to understand and maintain.
You can also set some environment variables in advance. It can be done by setting them in the console or setting them from my computer :. Of course you can combine all approaches. Check also arguments syntax , shift. The number of args that can be supplied is limited to total characters on command line.
To overcome this limitation, the previous paragraph trick is a workaround without risking exposure of user passwords. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? So it works with and without quotes, and also with no args. I've been struggling recently with the implementation of complex parameter switches in a batch file so here is the result of my research. None of the provided answers are fully safe, examples:.
The only way to ensure all above scenarios are covered is to use EnableDelayedExpansion and to pass the parameters by reference not by value using variables. Then even the most complex scenario will work fine:. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to check command line parameter in ". Ask Question. Asked 10 years, 11 months ago. Active 1 year, 4 months ago. Viewed k times.
I always get error: GOTO was unexpected at this time. Can anyone tell me what am I doing wrong here? Improve this question. Ross Ridge Add a comment. Active Oldest Votes. Improve this answer. Skip R 2 2 silver badges 14 14 bronze badges. This works!! Only "else" is not accepted. I get error: 'else' is not recognized as an internal or external command, operable program or batch file.
So I added another IF for "not equal to -b" case. Thanks for the quick answer. See Jeremiah Willcock's answer for a solution that works even for parameters with spaces in their values. In mathematical terms a parameter is "a numerical or other measurable factor" so typically a number. In programming terminology: A parameter represents a value that the procedure expects you to pass when you call it. An argument represents the actual value that you pass to a procedure.
In practice the phrases argument and parameter tend to be used interchangeably, CMD batch files do not perform any type checking. The FOR command creates parameter variables which are identified with a letter rather than a number e.
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