Variable: noninteractive
noninteractive is a variable defined in emacs.c.
Value
t
Documentation
Non-nil means Emacs is running without interactive terminal.
Probably introduced at or before Emacs version 16.
Source Code
// Defined in /usr/src/emacs/src/emacs.c
DEFVAR_BOOL ("noninteractive", noninteractive1,
doc: /* Non-nil means Emacs is running without interactive terminal. */);