How do I detect if script was CALL'ed or invoked directly, in Windows CMD.EXE shell?

Question

I need to distinguish these two situations inside script.cmd:

C:\> call script.cmd
C:\> script.cmd

How can I determine if my script.cmd was invoked directly, or invoked in the context of using a CALL?

If it matters, this is on Windows 7.

@echo off
set invoked=0
rem ---magic goes here---
if %invoked%==0 echo Script invoked directly.
if %invoked%==1 echo Script invoked by a CALL.

Anyone know the "magic goes here" which would detect having been CALL'ed and set invoked=1?

Answer 1

At this moment, I see no way to detect it, but as a workaround you can always force the use of the sentinel.

@echo off
    setlocal enableextensions
    rem If "flag" is not present, use CALL command
    if not "%~1"=="_flag_" goto :useCall
    rem Discard "flag"
    shift /1

    rem Here the main code

    set /a "randomExitCode=%random% %% 2"   
    echo [%~1] exit with code %randomExitCode%
    exit /b %randomExitCode%
    goto :eof


rem Retrieve a correct full reference to the current batch file    
:getBatchReference returnVar
    set "%~1=%~f0" & goto :eof

rem Execute     
:useCall
    setlocal enableextensions disabledelayedexpansion
    call :getBatchReference _f0
    endlocal & call "%_f0%" _flag_ %*

This will allow you to use the indicated syntax

script.cmd first && script.cmd second && script.cmd third

The posted code ends the script with a random exit code for testing. Execution will continue when the exit code is 0

NOTE: For it to work, at least in XP, it seems the call to the batch file MUST be the last code in the batch file

Answer 2

Check if the script's path is in the CMDCMDLINE variable. If not, then it was probably called.

In this example I use %CMDCMDLINE:"=/% to turn the quotes into forward-slashes (the FIND command can't search for quotes) and I echo it with <NUL SET/P="" so that certain characters in the file path (like ampersands) don't break the script.

<NUL SET/P="%CMDCMDLINE:"=/%" | FIND "/%~0/">NUL || (
    REM Commands to perform if script was called
    GOTO:EOF
)

::AND/OR

<NUL SET/P="%CMDCMDLINE:"=/%" | FIND "/%~0/">NUL && (
    REM Commands to perform if script was NOT called
    GOTO:EOF
)