From: <hesso@pool.math.tu-berlin.de>
Subject: If there's no $TERM around, just fall back to "dumb".

diff -Naur nvi-1.81.6.orig/cl/cl_main.c nvi-1.81.6/cl/cl_main.c
--- nvi-1.81.6.orig/cl/cl_main.c	2007-11-18 17:41:42.000000000 +0100
+++ nvi-1.81.6/cl/cl_main.c	2008-05-01 18:29:13.000000000 +0200
@@ -96,6 +96,7 @@
 	if ((ttype = getenv("TERM")) == NULL)
 		ttype = "unknown";
 	term_init(gp->progname, ttype);
+	ttype = getenv("TERM");
 
 	/* Add the terminal type to the global structure. */
 	if ((OG_D_STR(gp, GO_TERM) =
@@ -233,6 +234,11 @@
 
 	/* Set up the terminal database information. */
 	setupterm(ttype, STDOUT_FILENO, &err);
+	if (err == 0) {
+		(void)fprintf(stderr, "%s: %s: unknown terminal type, falling back to 'dumb'\n", name, ttype);
+		setenv("TERM", "dumb", 1);
+		setupterm("dumb", STDOUT_FILENO, &err);
+	}
 	switch (err) {
 	case -1:
 		(void)fprintf(stderr,
