- 跳到粗体以跳过绒毛 -
我是 ubuntu 的新手，所以仍在学习 bash 脚本的运作方式。我已经得到了我一直在研究的这段代码，效果很好。 （附带问题 - 我可以优化倒计时部分吗？定义一次，然后在每个部分中调用它？）。使用该totem "/video/location/here.ext"命令，我的问题是视频播放器仅加载一个视频。
实际问题totem "/video.ext"：在终端中使用命令时，如何确保当前视频结束后图腾知道自动继续下一个视频？
#!/bin/bash
PS3='
So, you want to watch Elfen Lied? Choose an episode (1-14): '
options=("A Chance Encounter" "Annihilation" "Deep Feelings" "Attack" "Receipt" "Innermost Feelings" "Confrontation" "The Beginning" "Reminiscence" "Infant" "Complication" "Quagmire" "No Return" "Episode 10.5 - OVA" "Quit")
select opt in "${options[@]}"
do
case $opt in
"A Chance Encounter")
echo "You chose Episode 01 - A Chance Encounter"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 01 - A Chance Encounter.mkv";;
"Annihilation")
echo "You chose Episode 02 - Annihilation"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 02 - Annihilation.mkv";;
"Deep Feelings")
echo "You chose Episode 03 - Deep Feelings"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 03 - Deep Feelings.mkv";;
"Attack")
echo "You chose Episode 04 - Attack"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 04 - Attack.mkv";;
"Receipt")
echo "You chose Episode 05 - Receipt"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 05 - Receipt.mkv";;
"Innermost Feelings")
echo "You chose Episode 06 - Innermost Feelings"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 06 - Innermost Feelings.mkv";;
"Confrontation")
echo "You chose Episode 07 - Confrontation"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 07 - Confrontation.mkv";;
"The Beginning")
echo "You chose Episode 08 - The Beginning"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 08 - The Beginning.mkv";;
"Reminiscence")
echo "You chose Episode 09 - Reminiscence"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 09 - Reminiscence.mkv";;
"Infant")
echo "You chose Episode 10 - Infant"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 10 - Infant.mkv";;
"Complication")
echo "You chose Episode 11 - Complication"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 11 - Complication.mkv";;
"Quagmire")
echo "You chose Episode 12 - Quagmire"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 12 - Quagmire.mkv";;
"No Return")
echo "You chose Episode 13 - No Return"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 13 - No Return.mkv";;
"Episode 10.5 - OVA")
echo "You chose Episode 10.5 - OVA"
sleep 1
echo "Starting in 3..."
sleep 1
echo "Starting in 2..."
sleep 1
echo "Starting in 1..."
sleep 1
totem "/home/xhynk/Desktop/media/Anime/Elfen Lied/Elfen Lied - 14 (10.5 OVA).mkv";;
"Quit")
break;;
*) echo "Invalid Option. Type 1-14, or type 15 to quit.";;
esac
done
答案1
#!/usr/bin/env bash
countdown() {
i=$1
while [ $i -gt 0 ]; do
printf "Starting in %d...\n" $i
sleep 1
i=$(( i - 1 ))
done
}
countdown 3
现在，如果你想变得更花哨，tput可能值得研究一下：
tcountdown() {
i=$1
clear
while [ $i -gt 0 ]; do
tput cup $(( i - 1 )) 40
printf $i
sleep 1
i=$(( i - 1 ))
done
tput cup 0 40
printf "0\n"
}