How to get the PID of a process in a pipeline

Question

Consider the following simplified example:

my_prog|awk \'...\' > output.csv &
my_pid=\"$!\" #Gives the PID for awk instead of for my_prog
sleep 10
kill $my         


        

Answer 1

Just had the same issue. My solution:

process_1 | process_2 &
PID_OF_PROCESS_2=$!
PID_OF_PROCESS_1=`jobs -p`

Just make sure process_1 is the first background process. Otherwise, you need to parse the full output of jobs -l.