top: failed tty get

Question

I am running following script to monitor some processes and store the output in html file. But on running, it gives the error top: failed tty get. Here is the script:

var=4
while [ $var -ge 0 ]
do
`echo q | htop --p=2164 | aha --black --line-fix >> htop2.html`
#$cmd
sleep 1
var=$(($var-1))
done

Please guide me to solve this error!

Answer 1

It seems to me, that you don't have htop installed. What's the output of which htop and alias? Most likely the command htop points to top on your system. Contrary to htop, top cannot be used in non-interactive environments/scripts. Try to install the 'real' htop.