From: utzoo!decvax!wivax!linus!smk
Newsgroups: net.unix-wizards
Title: Re: small bug in "vi"
Article-I.D.: linus.19604
Posted: Tue Apr  5 15:11:08 1983
Received: Wed Apr  6 03:03:42 1983
References: sri-arpa.793 wjh12.194

	wjh12^sob brings up the point about getting the prompt while
not in an interactive shell.  Let me repeat what has been said before.
Your .cshrc should look like:

if ($?prompt) then
	...
endif

so that it is only executed when in an interactive shell (when
the prompt var is defined).  Also, this has the benefit that all
the aliasing and setting aren't done for shell scripts (where they
are a waste at a minimum and trouble for strange aliasing) that
don't have the -f at the top.

	Also, for emacs users, you shouldn't use the `tty` command
in your .cshrc or .login.  This is because while in emacs (and
running a subshell), you aren't really connected to a tty, but rather
a MPX file (in 4.1bsd of course).  The tty, write, and other commands
that use isatty(2) won't work.  It's better to check on the TERM
variable to check on terminals (although this isn't always helpful)
for cases like hardwaired or full screen.  Keep in mind .login is
executed in the login shell after .cshrc, so the initial .cshrc doesn't
have the real TERM from tset.  In the login shell, you have to have extra
code in .login for that.

	--steve