Check if process is running Mac OS X then execute code

I am creating a script which clears the cache for Google Chrome. However, I would like to check if Chrome is open and if so not run the code but if it isn’t then it will execute the code. I can see that the Process Name is Google Chrome but the code doesn’t work.

This is what I have done so far. What am I doing wrong?

SERVICE='Google Chrome'

if ps ax | grep -v grep | grep $SERVICE
then
    RUNS THE CODE
else
    echo "PLEASE CLOSE GOOGLE CHROME"
fi

Any help would be appreciated 🙂

Answers:

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Method 1

As @StéphaneChazelas mentions, you can use pgrep – from the man page:

The pgrep command searches the process table on the running system and prints the process IDs of all processes that match the criteria given on the command line.

SERVICE='Google Chrome'

if pgrep -xq -- "${SERVICE}"; then
    echo running
else
    echo not running
fi

Method 2

You need to quote “$SERVICE”:

SERVICE='Google Chrome'

if ps ax | grep -v grep | grep "${SERVICE}" &> /dev/null; then
    echo running
else
    echo not running
fi

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0