#!/bin/sh

# Print how many lines into a file a matching line is.  Usage:
# 
#   $ wline NEEDLE HAYSTACK
#   438/465  (94.19%)
#   $ 

# As for the 'k' command in 'dc'.
PRECISION=2

NLINES=`wc -l "${2}" | cut -d " " -f 1`

for LINE in `grep -n "${1}" "${2}" | cut -d ":" -f 1`; do
  echo -n "${LINE}"/"${NLINES}  ("
  dc -e "${PRECISION} k ${LINE} 100 * ${NLINES} / n"
  echo "%)"
done