4

I have to write a batch file with a environment variable a param:

c:\myapp.exe -f "%APP_HOME%\file.conf" 

I need to pass exactly the string %APP_HOME% as param and not its value. How can I do?

In other words, I don't want to strip the variable in the batch runtime but I would like to let the application use it as parametrized path, if I change this environment variable I don't want to change the variable in the application.

  • 1
    Have you tried escaping the percent signs with a caret (^)? – paradroid Oct 10 '15 at 15:34
4

I need to pass exactly the string "%APP_HOME% as param

  1. Replace % with ^%
  2. Remove the "s

    c:\myapp.exe -f ^%APP_HOME^%\file.conf

test.cmd:

@echo %1 %2 %3

output:

F:\test>test c:\myapp.exe -f ^%APP_HOME^%\file.conf
c:\myapp.exe -f %APP_HOME%\file.conf
F:\test>

Further Reading

| improve this answer | |
  • Ok, but should I remove also the double quotes? How to solve if there is a space in the path? – Tobia Oct 10 '15 at 16:03
  • @Tobia You have to remove the quotes to stop the expansion. You can put the quotes back inside the batch file if necessary. – DavidPostill Oct 10 '15 at 16:04
  • @Tobia Try escaping the space with another caret. Not sure that will work in Windows, but worth a test. – paradroid Oct 10 '15 at 16:04
  • 1
    @Tobia You could can try using setlocal EnableDelayedExpansion. ss64.com/nt/delayedexpansion.html – paradroid Oct 10 '15 at 16:06
  • @paradroid setlocal EnableDelayedExpansion doesn't help. – DavidPostill Oct 10 '15 at 16:34

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