Lists all open IPv4 sockets allocated by the current user's running processes whose command line matches the regex passed as the first parameter.

list-my-open-sockets.sh

#!/bin/sh
#
# Lists all open IPv4 sockets allocated by the current user's
# running processes whose command line matches the regex passed
# as the first parameter. Uses "unicorn.*worker" by default -
# because we all love unicorns! :-)
#
# - vjt@openssl.it  Tue Nov 20 19:06:08 CET 2012
#

# Get process from the first argument
PROC=$1
USER=$(whoami)
DEFP="unicorn.*worker"

case "$PROC" in
  -h|--help|--usage)
    echo "Displays the IPv4 sockets opened by the current user's"
    echo "processes matching the given regexp (default: \\"$DEFP\\")"
    echo "Usage: $0 [process regex]"
    echo
    exit 1
  ;;
esac
[ -z "$PROC" ] && PROC=$DEFP

# Wrap the first letter of the regexp within square brackets, to
# avoid `grep` itself coming out in the output.
PROC=$(echo $PROC | sed -r 's#(^.)(.*)#[\\1]\\2#')

# Get the PIDs matching the resulting regex.
PIDS=$(ps -U $USER -o pid,cmd | grep "$PROC" | cut -f1 -d' ' | tr '\\n' ',')

# Run!
lsof -nP -p $PIDS -a -i4 2>/dev/null

# Forward the exit status
exit $!