misc/53798: tcsh and wsvt25 login issue

[scole_mail%gmx.com@localhost]

>Number:         53798
>Category:       misc
>Synopsis:       tcsh and wsvt25 login issue
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    misc-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Dec 17 18:00:00 +0000 2018
>Originator:     scole_mail
>Release:        8.0 pkgsrc-2018Q3
>Organization:
none
>Environment:
NetBSD dstar 8.0_STABLE NetBSD 8.0_STABLE (GENERIC) #0: Fri Nov 30 13:53:15 PST 2018  scole@dstar:/home/scole/nbsd/cvs/8_0/obj/sys/arch/i386/compile/GENERIC i386
>Description:
When I login with tcsh and a terminal that is wsvt25, the cursor
always jumps to line 28.  My console has about 66 lines with the
GENERIC kernel and some nvidia card.

The other shells I tried (sh/csh/bash) work as expected, just drawing
on the next lines.  I believe my /etc/ttys is more or less the i386
default with ttyE1/ttyE2/ttyE3 turned on.  The "console" which is set to
vt100 works as expected.

I understand I could change all ttys to vt100 or vt220, but it would
be nice if tcsh behaved the same as other shells.

I'm using standalone-tcsh-6.20.00nb2 tcsh and my /etc/ttys:

#
#       from: @(#)ttys  5.1 (Berkeley) 4/17/89
#       $NetBSD: ttys,v 1.20 2012/06/13 20:49:13 martin Exp $
#
# name  getty                           type    status          comments
#
console "/usr/libexec/getty Pc"         vt100   on secure
constty "/usr/libexec/getty Pc"         vt100   off secure
ttyE0   "/usr/libexec/getty Pc"         wsvt25  off secure
ttyE1   "/usr/libexec/getty Pc"         wsvt25  on secure
ttyE2   "/usr/libexec/getty Pc"         wsvt25  on secure
ttyE3   "/usr/libexec/getty Pc"         wsvt25  on secure

>How-To-Repeat:
login with tcsh to a wsvt25 console terminal (with more than 25 lines?)
>Fix: