$BatchInput

$BatchInput
is True if input in the current session is being fed directly to the Mathematica kernel in batch mode.

When $BatchInput is True, Mathematica terminates if it ever receives an interrupt, does not discard input when blank lines are given, and terminates when it receives end-of-file.

In an interactive session, $BatchInput is False by default:

Run a standalone Mathematica kernel with an input file:

Put commands in a file, in this case to evaluate $BatchInput:

Run the command. The session terminates at the end of the file:

The output file contains the value of $BatchInput:

Delete the temporary files:

In an interactive session, $BatchInput is False by default:

Out[1]=

Run a standalone Mathematica kernel with an input file:

Out[2]=

Put commands in a file, in this case to evaluate $BatchInput:

Run the command. The session terminates at the end of the file:

Out[4]=

The output file contains the value of $BatchInput:

Delete the temporary files: