resizeterm(3X)resizeterm(3X)NAMEresizeterm - change the curses terminal size
int resizeterm(int lines, int columns);
This is an extension to the curses library. It provides callers with a
hook into the ncurses data to resize windows, primarily for use by pro‐
grams running in an X Window terminal (e.g., xterm). The function
resizeterm resizes the standard and current windows to the specified
dimensions, and adjusts other bookkeeping data used by the ncurses
library that record the window dimensions.
When resizing the windows, the function blank-fills the areas that are
extended. The calling application should fill in these areas with
The function attempts to resize all windows. However, due to the call‐
ing convention of pads, it is not possible to resize these without
additional interaction with the application.
The function returns the integer ERR upon failure and OK on success.
It will fail if either of the dimensions less than or equal to zero, or
if an error occurs while (re)allocating memory for the windows.
While this function is intended to be used to support a signal handler
(i.e., for SIGWINCH), care should be taken to avoid invoking it in a
context where malloc or realloc may have been interrupted, since it
uses those functions.
If ncurses is configured to supply its own SIGWINCH handler, the
resizeterm function ungetch's a KEY_RESIZE which will be read on the
next call to getch. This is used to alert an application that the
screen size has changed, and that it should repaint special features
such as pads that cannot be done automatically.
Thomas Dickey (from an equivalent function written in 1988 for BSD