向上滚动 (SU)

参数 n 必须是大于等于 1 的整数。如果 n 小于 等于 0，则将 n 调整为 1。如果省略 n，则 n 默认为 1。

此序列执行将光标位置设到滚动区域顶部的 删除行 (DL)。它与 DL 的一些差异 在下文说明。

操作后光标位置必须与调用 SU 时保持不变。待定换行状态_不会_重置。

printf "\033[1;1H" # move to top-left
printf "\033[0J" # clear screen
printf "ABC\n"
printf "DEF\n"
printf "GHI\n"
printf "\033[2;2H"
printf "\033[S"

|DEF_____|
|GHI_____|

printf "\033[1;1H" # move to top-left
printf "\033[0J" # clear screen
printf "ABC\n"
printf "DEF\n"
printf "GHI\n"
printf "\033[2;3r" # scroll region top/bottom
printf "\033[1;1H"
printf "\033[S"

|ABC_____|
|GHI_____|

printf "\033[1;1H" # move to top-left
printf "\033[0J" # clear screen
printf "ABC123\n"
printf "DEF456\n"
printf "GHI789\n"
printf "\033[?69h" # enable left/right margins
printf "\033[2;4s" # scroll region left/right
printf "\033[2;2H"
printf "\033[S"

|AEF423__|
|DHI756__|
|G___89__|

cols=$(tput cols)
printf "\033[1;${cols}H" # move to top-right
printf "\033[2J" # clear screen
printf "A"
printf "\033[2;${cols}H"
printf "B"
printf "\033[3;${cols}H"
printf "C"
printf "\033[S"
printf "X"

|_______B|
|_______C|
|________|
|X_______|

printf "\033[1;1H" # move to top-left
printf "\033[0J" # clear screen
printf "top"
printf "\033[5;1H"
printf "ABCDEF"
printf "\033[2;5r" # scroll region top/bottom
printf "\033[4S"

|top_____|