我怎样才能使该功能发挥作用?
Esc在接受用户输入时按下将退出脚本
read -r -p "Enter the filenames: " -a arr
if press Esc; then
read $round
mkdir $round
fi
for filenames in "${arr[@]}"; do
if [[ -e "${filenames} ]]; then
echo "${filenames} file exists (no override)"
else
cp -n ~/Documents/library/normal.cpp "${filenames}"
fi
done
我如何检测Esc这个脚本中的密钥?
PS:看到很多资源
https://www.linuxquestions.org/questions/linux-newbie-8/bash-esc-key-in-a-case-statement-759927/
他们使用另一个变量喜欢$key
或者read -n1 $key
只是一个字符输入
但在这儿如果我有一个字符串或一个数组我该怎么办?
答案1
这应该适用于狂欢:
#!/bin/bash
# Bind the Escape key to run "escape_function" when pressed.
bind_escape () { bind -x '"\e": escape_function' 2> /dev/null; }
# Unbind the Escape key.
unbind_escape () { bind -r "\e" 2> /dev/null; }
escape_function () {
unbind_escape
echo "escape key pressed"
# command/s to be executed when the Escape key is pressed
exit
}
bind_escape
# Use read -e for this to work.
read -e -r -p "Enter the filenames: " -a arr
unbind_escape
# Commands to be executed when Enter is pressed.
for filename in "${arr[@]}"; do
echo "$filename"
done
答案2
Esc字符是一个特殊字符。
通常,当我想用read
命令拦截特殊字符(如 ESC、F1...F12、箭头...)时,我会使用循环。
#! /bin/bash
declare -r CHAR_LF=$'\n'
declare -r CHAR_ESC=$'\e'
declare -i FLAG_ESC=0
declare RES=
echo -n "Enter the filenames: "
while read -r -N 1 -p "" -d "" CHAR; do
if [[ "${CHAR}" == "${CHAR_ESC}" ]]; then
FLAG_ESC=1
echo
break
elif [[ "${CHAR}" == "${CHAR_LF}" ]]; then
break
else
RES+="${CHAR}"
fi
done
if [[ $FLAG_ESC -eq 1 ]]; then
echo "ESC pressed"
else
echo "Use RES variable with '${RES}' value"
fi