Question

I need to read the output of my command to array and store them in order to use after in my script.My script is;

  let i=0
  declare -a array
  $PS -ef|$GREP -v grep|$GREP $NAME | $SED -n 's/.*-q\s\([0-9]\+\).*/\1/p' | while read line; do
    array[$i]=$line
    echo ${array[$i]}   
    (( i++ ))
    echo ${#array[@]}           
    done < <($PS -ef|$GREP -v grep|$GREP $NAME | $SED -n 's/.*-q\s\([0-9]\+\).*/\1/p')  
    echo ${#array[@]}

So when the loop exits size of the array becomes 0 because of subshell. Is there a way to fix this?

Answer 1

You appear to have identical inputs on both ends of your pipe:

foo | while read line; do
    ...
done <( foo )

Try dropping the first so that the while loop doesn’t execute in a subshell:

while read line; do
    ...
done <( foo )

If you are using bash 4 or higher, you can replace the while loop with a call to readarray:

readarray array <( foo )