🚀 go-pugleaf

I haven't been lurking for a few weeks to make sure I'm avoiding
common gaffes, but I have checked the FAQ briefly.  I apologize if I
missed this question on the FAQ, but it seems unlikely, since it's
actually a question about tty programming.

I'm the author of a couple of client programs that support full-screen
tty displays, and I often run into the problem that the xterm termcap
seems to be missing the "cs" (set scroll area) capability, even though
xterms support it.  Users can set their TERM to vt100 and everything
is fine, but my users don't generally know this, and I'd rather deal
with the problem transparently if possible.  Unfortunately, most
setups I've seen set the TERMCAP environment variable with all the
termcap information so that the li# and co# fields will be correct, so
the simple

	term = getenv("TERM");
	if (!term)
		barf();
	if (strcmp(term, "xterm") == 0)
		term = "vt100";

shouldn't help most of the time.

Has anybody else dealt with this problem?  Does anyone know *why* the
xterm termcap is missing this capability?  My current plan is to check
for an xterm termtype and hardcode the cs capability for it, but
that's an ugly solution.  Of course, I may eventually write an X
interface for my most recent program, and this would be the ideal
solution.

Thanks for any help.

--GBH