I'm trying write an APL interpreter that runs in an xterm,
or possibly over a dumb-terminal with fewer features.
How can I detect if the "terminal" is emacs?

On Thursday 22 December 2016 09:58 AM, luser droog wrote:
> I'm trying write an APL interpreter that runs in an xterm,
> or possibly over a dumb-terminal with fewer features.
> How can I detect if the "terminal" is emacs?

Here is what I get in various terminal modes in Emacs 24.5.1:

*term*
$ echo $TERM
eterm-color

*ansi-term*
$ echo $TERM
eterm-color

*eshell*
$ echo $TERM
dumb

*shell*
$ echo $TERM
dumb

-- 
Udyant Wig
.... the sentiments of men are known, not only by what they receive, but what
they reject also ...
                                -- Thomas Jefferson

luser droog <mijoryx@yahoo.com> writes:
> I'm trying write an APL interpreter that runs in an xterm,
> or possibly over a dumb-terminal with fewer features.
> How can I detect if the "terminal" is emacs?

If you really want to detect emacs and not just the capabilities of the
terminal emulator,

	   Emacs sets the environment variable `INSIDE_EMACS' in the
	subshell to a comma-separated list including the Emacs version.
	Programs can check this variable to determine whether they are
	running inside an Emacs subshell.

	   Emacs also sets the `EMACS' environment variable (to `t') if
	it is not already defined.  *Warning:* This environment variable
	is deprecated.  Programs that check this variable should be
	changed to check `INSIDE_EMACS' instead.

On 2016-12-21 20:28, luser droog wrote:

> I'm trying write an APL interpreter that runs in an xterm,
> or possibly over a dumb-terminal with fewer features.
> How can I detect if the "terminal" is emacs?

Inspect TERM environment variable.

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