Bash script error: integer expression expected
That's because you are checking whether the string gpio -g read 22
is greater than 1. Since gpio -g read 22
is not a number, you get that error.
You don't explain what you are trying to do but I'm guessing you want to compare the output of the gpio
command. To do that, you need to enclose the command in $()
or backticks (``
):
x=$(gpio -g read 22)
if [ "$x" -ge 1 ]
then
gpio -g write 23 1
fi
Or, more simply:
[ "$(gpio -g read 22)" -ge 1 ] && gpio -g write 23 1
The assignment foo='command'
doesn't run command
. The variable foo
takes the value of the string command
and not its output.