Document LINES and COLS environment variables.

lib/libcurses/curses_screen.3

@@ -1,4 +1,4 @@
-.\"	$NetBSD: curses_screen.3,v 1.5 2003/02/14 16:29:12 grant Exp $
+.\"	$NetBSD: curses_screen.3,v 1.6 2003/04/08 18:57:09 jdc Exp $
 .\"
 .\" Copyright (c) 2002
 .\"	Brett Lymn (blymn@NetBSD.org, brett_lymn@yahoo.com.au)
@@ -30,7 +30,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\"
-.Dd August 12, 2002
+.Dd April 8, 2003
 .Dt CURSES_SCREEN 3
 .Os
 .Sh NAME
@@ -64,6 +64,10 @@
 .Fn resizeterm "int lines" "int cols"
 .Ft int
 .Fn setterm "char *name"
+.Ft extern int
+.Dv LINES
+.Ft extern int
+.Dv COLS
 .Sh DESCRIPTION
 These functions initialize terminals and screens.
 .Pp
@@ -113,6 +117,16 @@ The exception to this rule is the
 .Fn newterm
 call which may be called prior to
 .Fn initscr .
+The size of the curses screen is determined by checking the
+.Xr tty 4
+size and then the
+.Xr termcap 5
+entries for the terminal type.
+If the environment variables
+.Dv LINES
+or
+.Dv COLS
+are set, then these will be used instead.
 .Pp
 The
 .Fn isendwin
@@ -153,13 +167,13 @@ An error occurred in the function.
 .El
 .Sh SEE ALSO
 .Xr curses_window 3 ,
+.Xr tty 4
 .Xr termcap 5
 .Sh STANDARDS
 The
-.Lb libcurses
-library complies with the X/Open Curses specification, part of the
-Single Unix Specification.
 .Nx
+Curses library complies with the X/Open Curses specification, part of the
+Single Unix Specification.
 .Sh HISTORY
 The Curses package appeared in
 .Bx 4.0 .