>Number:         34717
>Category:       bin
>Synopsis:       [dM] top demands termcap entry with li#
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Oct 04 22:15:00 +0000 2006
>Originator:     der Mouse
>Release:        NetBSD 4.99.1 (usr.bin/top screen.c,v 1.8)
>Organization:
	Dis-
>Environment:
	Any using top built with screen.c,v 1.8 (possibly others too)
>Description:
	top(1) demands that the termcap entry for $TERM contain a li#
	attribute, or it considers the terminal "dumb", even when stty
	size holds a perfectly good size and there is no other reason
	to treat it as dumb.

	This is because the code in screen.c specifically checks for
	"li", and, if it's not found, goes into dumb-terminal mode.
	See line 178ff of screen.c (line number as of version 1.8).

	This also runs contrary to the documentation, which says that
		an "intelligent" terminal is one that supports cursor
		addressing, clear screen, and clear to end of line
	Note the lack of mention of a line count.
>How-To-Repeat:
	Set $TERM to a terminal type for which $TERMCAP does not
	contain an li#.  Set the correct line count with stty rows.
	Run top(1) and notice it runs in its "dumb terminal, do just
	one display" mode.  (I first noticed this with the termcap
	entry in $TERMCAP; while experimenting, I discovered it applies
	equally well with the termcap entry in a file and $TERMCAP
	naming that file.  With that clue, I tracked down the reason in
	the code.)

	In my case this came from a terminal emulator that doesn't put
	li# or co# in the entry it puts in $TERMCAP, since the terminal
	can be resized.
>Fix:
	I'd be inclined to have a missing "li" just set a flag; if
	get_screensize() fails to provide a line count, use that flag
	to *then* go into dumb-terminal mode.

	I'll add a patch to this PR if I find the round tuits to
	construct one.

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