#!/bin/bash
# grp.sh: 'grep'À» ¾ÆÁÖ Á¶ÀâÇÏ°Ô ´Ù½Ã ±¸Çö.

E_BADARGS=65

if [ -z "$1" ]    # ÀÎÀÚ È®ÀÎ.
then
  echo "»ç¿ë¹ý: `basename $0` pattern"
  exit $E_BADARGS
fi  

echo

for file in *     # $PWD ÀÇ ¸ðµç ÆÄÀÏÀ» Ž»ö.
do
  output=$(sed -n /"$1"/p $file)  # ¸í·É¾î ġȯ.

  if [ ! -z "$output" ]           # "$output" À» Äõ¿ìÆ® ¾È ÇÏ¸é ¾î¶»°Ô µÉ±î¿ä?
  then
    echo -n "$file: "
    echo $output
  fi              #  sed -ne "/$1/s|^|${file}: |p"  ¶ó°í Çصµ ¶È°°½À´Ï´Ù.

  echo
done  

echo

exit 0

# µ¶ÀÚ¿ë ¿¬½À¹®Á¦:
# ---------------
# 1) ÁÖ¾îÁø ÆÄÀÏ¿¡¼­ Çϳª ÀÌ»ó ÀÏÄ¡ÇÑ´Ù¸é Ãâ·Â¿¡ ´º¶óÀÎÀ» Ãß°¡ÇØ º¸¼¼¿ä.
# 2) ¿©·¯°¡Áö Ư¡µéÀ» Ãß°¡ÇØ º¸¼¼¿ä.