set_terminal_size.sh

#!/this/script/can/only/be/run/in/bash

get_terminal_size ()
{
	# ESC 7              = 儲存游標位置和屬性
	# ESC [r             = 啟用全螢幕捲動
	# ESC [{row};{col}H  = 移動游標
	# ESC 6n             = 回報目前游標位置
	# ESC 8              = 還原游標位置和屬性
	printf '\e7\e[r\e[999;999H\e[6n\e8' 1>&2
	read -r -s -d R getsize
	printf '%s' "$getsize" | sed 's#..\([0-9]*\);\([0-9]*\)#LINES=\1 COLUMNS=\2#'
}

set_terminal_size ()
{
	eval "export $(get_terminal_size)"
	stty cols "$COLUMNS" rows "$LINES"
}