我有一台Linux设备，上面有一个EmulationStation(键盘通过USB连接(。我想在终端中处理游戏板按键，这样我就不必为此插入键盘。
检测游戏板密钥代码的测试脚本：
#!/bin/bash
echo 'Press button "L1":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "L1":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "L2":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "L2":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "Up":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "Up":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "Down":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "Down":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "Left":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "Left":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "Right":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "Right":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "Select":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "Select":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "L3":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "L3":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "Start":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "Start":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "X":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "X":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "Y":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "Y":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "B":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "B":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "A":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "A":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "R3":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "R3":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "R2":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "R2":' >> keycode.txt
echo "$key" >> keycode.txt
echo 'Press button "R1":'
key=`jstest --event /dev/input/js0 | grep -m 1 "type 1, time .*, number .*, value 1" | awk -F ',' '{print $3}' | awk '{print $2}'`
echo 'Button "R1":' >> keycode.txt
echo "$key" >> keycode.txt
当您通过SSH连接或退出EmulationStation并启动tty时，脚本工作正常，当您按下游戏板键时，密钥代码被检测到，它被成功写入文件，过程完成。
如果脚本直接从EmulationStation运行，问题就会出现，显然jstest --event /dev/input/js0正在循环。
从EmulationStation运行脚本的过程如下所示：
Press button "L1":
该脚本对游戏板按键没有响应，或者我们看不到它。同时，游戏板已连接，使用第二个脚本，我们可以看到与按键的区别：
#!/bin/bash
jstest --event /dev/input/js0
第二个脚本的输出：
Event: type 1, time -195236, number 9, value 1
Event: type 1, time -195128, number 9, value 0
Event: type 1, time -194840, number 8, value 1
Event: type 1, time -194744, number 8, value 0
Event: type 1, time -194492, number 10, value 1
Event: type 1, time -194360, number 10, value 0
Event: type 1, time -194096, number 9, value 1
Event: type 1, time -194096, number 11, value 1
Event: type 1, time -194000, number 9, value 0
Event: type 1, time -193988, number 11, value 0
显然，这个问题与循环无限期运行有关，而使用grep -m 1 "type 1, time .*, number .*, value 1"并不能结束它
当脚本不起作用时，ps aux显示以下过程：
user 635 0.0 0.0 2048 508 ? S 03:58 0:00 sh -c sudo chmod 666 /dev/tty1; /opt/system/Scripts/Keycode.sh > /dev/tty1; printf " 33c" >> /dev/tty1
user 645 0.0 0.3 6464 2916 ? S 03:58 0:00 /bin/bash /opt/system/Scripts/Keycode.sh
user 646 0.0 0.1 6464 1572 ? S 03:58 0:00 /bin/bash /opt/system/Scripts/Keycode.sh
user 647 0.0 0.0 1924 464 ? S 03:58 0:00 jstest --event /dev/input/js0
user 651 0.0 0.2 8416 2728 pts/0 R+ 03:59 0:00 ps aux
我想从EmulationStation运行一个脚本，以便它对按下游戏板按钮做出反应。如果有其他方法可以在不使用GUI的情况下做到这一点，请编写它
我通过使用这个perl模块解决了终端中游戏板输入的问题。