I'm trying to write a ksh script that uses awk, but I want to pass variables to awk. For example (not working):

if [[ -n $1 ]];then
searchstr=$1
lsof -i | awk '{if($9~/SEARCHSTR/) print $2} SEARCHSTR=$searchstr'
else
echo "usage: $0 <search string>"
fi

I tried several options. Is it posisble to do this without writing a sepoerate awk script and load it with: awk -f script.awk var=$value

I prefer to have all the code in the same script.

[The script tries to get all pid's assosciated with a certain portnumber.]