Determining if batch script has been started/executed from the command line (cmd) -or- To pause or not to pause?

Question

I like to have a typical \"usage:\" line in my cmd.exe scripts — if a parameter is missing, user is given simple reminder of how the script is to be used.

Answer 1

You can check the value of %CMDCMDLINE% variable. It contains the command that was used to launch cmd.exe.

I prepared a test .bat file:

@Echo Off
echo %CMDCMDLINE%
pause

When run from inside of open cmd.exe window, the script prints "C:\Windows\system32\cmd.exe". When run by double-clicking, it prints cmd /c ""C:\Users\mbu\Desktop\test.bat" "

So to check if your script was launched by double-clicking you need to check if %cmdcmdline% contains the path to your script. The final solution would look like this:

@echo off

set interactive=1
echo %cmdcmdline% | find /i "%~0" >nul
if not errorlevel 1 set interactive=0

rem now I can use %interactive% anywhere

if _%1_==__ (
    echo usage: %~nx0 filename
    if _%interactive%_==_0_ pause
)

Edit: implemented fixes for issues changes discussed in comments; edited example to demonstrate them