tcsh - SHELL: Undefined variable.

[Anton Shterenlikht]

>From tom at invisible-island.net Mon Feb 22 11:52:29 2016
>On Mon, Feb 22, 2016 at 02:10:41AM -0800, Anton Shterenlikht wrote:
>> I noticed recently that my tcsh does not
>> define SHELL anymore:
>>=20
>> > echo $SHELL
>> SHELL: Undefined variable.
>>=20
>> There is XTERM_SHELL:
>>=20
>> > setenv|grep SHELL
>> XTERM_SHELL=3D/bin/tcsh
>
>what version of xterm is this?
>
>	xterm -v

> xterm -v
XTerm(321)

Anton