In Windows cmd, how do I prompt for user input and

Question

I have a Windows .bat file which I would like to accept user input and then use the results of that input as part of the call to additional commands.

For example, I'd like to accept a process ID from the user, and then run jstack against that ID, putting the results of the jstack call into a file. However, when I try this, it doesn't work.

Here's my sample bat file contents:

@echo off
set /p id=Enter ID: 
echo %id%
jstack > jstack.txt

and here's what shows up in jstack.txt:

Enter ID: Terminate batch job (Y/N)? 

Answer 1

There is no documented /prompt parameter for SETX as there is for SET.

If you need to prompt for an environment variable that will survive reboots, you can use SETX to store it.

A variable created by SETX won't be usable until you restart the command prompt. Neatly, however, you can SETX a variable that has already been SET, even if it has the same name.

This works for me in Windows 8.1 Pro:

set /p UserInfo= "What is your name?  "
setx UserInfo "%UserInfo%"

(The quotation marks around the existing variable are necessary.)

This procedure allows you to use the temporary SET-created variable during the current session and will allow you to reuse the SETX-created variable upon reboot of the computer or restart of the CMD prompt.

(Edited to format code paragraphs properly.)

Answer 2

Just to keep a default value of the variable. Press Enter to use default from the recent run of your .bat:

@echo off
set /p Var1=<Var1.txt
set /p Var1="Enter new value ("%Var1%") "
echo %Var1%> Var1.txt

rem YourApp %Var1%

In the first run just ignore the message about lack of file with the initial value of the variable (or do create the Var1.txt manually).

Answer 3

The syntax is as such: set /p variable=[string]

Check out http://commandwindows.com/batch.htm or http://www.robvanderwoude.com/userinput.php for a more deep dive into user input with the different versions of Windows OS batch files.

Once you have set your variable, you can then go about using it in the following fashion.

@echo off
set /p UserInputPath=What Directory would you like?
cd C:\%UserInputPath%

note the %VariableName% syntax

Answer 4

@echo off
set /p input="Write something, it will be used in the command "echo""
echo %input%
pause

if i get what you want, this works fine. you can use %input% in other commands too.

@echo off
echo Write something, it will be used in the command "echo"
set /p input=""
cls
echo %input%
pause 

Answer 5

Just added the

set /p NetworkLocation= Enter name for network?

echo %NetworkLocation% >> netlist.txt

sequence to my netsh batch job. It now shows me the location I respond as the point for that sample. I continuously >> the output file so I know now "home", "work", "Starbucks", etc. Looking for clear air, I can eavulate the lowest use channels and whether there are 5 or just all 2.4 MHz WLANs around.

Answer 6

Try this:

@echo off
set /p id="Enter ID: "

You can then use %id% as a parameter to another batch file like jstack %id%.

For example:

set /P id=Enter id: 
jstack %id% > jstack.txt