The filter() function changes how X/Open Curses initializes terminal capabilities that assume the terminal has more than one line. After a call to filter(), the initscr(3XCURSES) or newterm(3XCURSES) functions also:

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

The filter() function does not return a value.

None.

initscr(3XCURSES), newterm(3XCURSES)