misc/174937: vt520's termcap entry lacks sc capability

[IWAMOTO Kouichi]

>Number:         174937
>Category:       misc
>Synopsis:       vt520's termcap entry lacks sc capability
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jan 03 12:40:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     IWAMOTO Kouichi
>Release:        FreeBSD 9.1-PRERELEASE amd64
>Organization:
>Environment:
System: FreeBSD tomoko.iwmt.org 9.1-PRERELEASE FreeBSD 9.1-PRERELEASE #1: Wed Sep 5 11:21:28 JST 2012 sue at tomoko.iwmt.org:/usr/obj/usr/src/sys/TOMOKO amd64


	
>Description:
In termcap, vt520 entry has rc (restore cursor) capability, but doesn't have sc (save cursor) capability.
Some termcap based application (e.g. less) reports following warning message.

"TERMCAP", line 0, terminal 'vt520': restore_cursor but no save_cursor
>How-To-Repeat:
% TERM=vt520 less -Ff /dev/null
>Fix:

--- share/termcap/termcap.src.orig	2013-01-03 21:13:34.000000000 +0900
+++ share/termcap/termcap.src	2013-01-03 21:17:41.000000000 +0900
@@ -2729,7 +2729,7 @@
 	:kb=\b:kd=\E[B:ke=\E>:kl=\E[D:\
 	:kr=\E[C:ks=\E=:ku=\E[A:nd=\E[C:\
 	:rc=\E8:rf=/usr/lib/tabset/vt100:\
-	:se=\E[m:so=\E[7m:\
+	:sc=\E7::se=\E[m:so=\E[7m:\
 	:sr=\EM:ue=\E[m:up=\E[A:us=\E[4m:nl=\E[B:ko=do,nd,up:
 #
 vt520nam|vt520-nam|v520n|DEC VT520 with no automargins:\
>Release-Note:
>Audit-Trail:
>Unformatted: