在bash脚本中切换两个命令？

Question

I would like to use a simple bash script to toggle on/off of the touchpad of my laptop. I know that I can use synclient Touchpadoff=1 to turn off the touchpad and use synclient Touchpadoff=0 to turn it on. But is there any way to toggle between these two commands (ie, if the touchpad is off, then turn it on, and vice versa)?

Thanks!

Answer 1

Doing synclient -l , you can see the line

    TouchpadOff          = 0

(or =1)
You then just have to grep this value and call synclient Touchpadoff= with the other value.
For instance in a script toggleTouchpad.sh , you can have

#!/bin/bash
synclient TouchpadOff=$(synclient -l | awk '/TouchpadOff/{print !strtonum($3)}')

the awk command will print the "opposite" of the third field ( = is the second), so if it's 1 it will print 0, if it's 0 it will print 1.

Answer 2

not very good, but easy to implement solution is to save in /tmp/touch.state actual state of touchpad.
If it's '0' - enable touchpad and store '1' in file and vice versa