#!/bin/sh

# example: dtnsim -n 10 -M Log | ./p-coverage.sh 10 50

# Extract N and p from command-line arguments.
n=$1; shift
p=$1; shift

# Calcurate the stop criteria.
threshold=$(($n * $p / 100 - 1))

# Exclude non-forwarding line from STDIN.
grep forward |
    # Discard duplicate message transmissions.
    grep -v dup |
    # Display the THRESHOLD-th line
    sed -n "${threshold}p" | 
    # Display only the first field.
    awk '{ print $1 }'