filter Subroutine

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Purpose

Disables use of certain terminal capabilities.

Library

Curses Library (libcurses.a)

Syntax

#include <curses.h>
void filter(void);

Description

The filter subroutine changes the algorithm for initialising terminal capabilities that assume that the terminal has more than one line. A subsequent call to the initscr or newterm subroutine performs the following actions:

  • Disables use of clear, cud, cud1, cup, cuu1, and vpa.
  • Sets the value of the home string to the value of the cr. string.
  • Sets lines equal to 1.

Any call to the filter subroutine must precede the call to the initscr or newterm subroutine.