#!/bin/bash

# ÀÌ ½ºÅ©¸³Æ®´Â ¾Õ¼­ ¼Ò°³ÇØ µå·È´ø ½ºÅ©¸³Æ®ÀÇ ´Ù¸¥ ÇüÅÂÀÔ´Ï´Ù.

# Heiner Steven ÀÌ Á¦°øÇØ ÁØ °ÍÀ¸·Î, 
# ÀçÁöÇâ ·çÇÁ°¡ ¼­ºê½©·Î µ¹ °æ¿ì¿¡ ·çÇÁ ¾ÈÀÇ º¯¼ö°ªÀÌ
# ·çÇÁ Á¾·áÈÄ ±× °ªÀ» ÀÒ¾î ¹ö¸®´Â °Í¿¡ ´ëÇÑ ÇØ°áÃ¥ÀÔ´Ï´Ù.


if [ -z "$1" ]
then
  Filename=names.data     # ÆÄÀÏÀ̸§ÀÌ ÁöÁ¤µÇÁö ¾Ê¾ÒÀ» °æ¿ìÀÇ ±âº»°ª.
else
  Filename=$1
fi  


exec 3<&0                 # Ç¥ÁØÀÔ·ÂÀ» 3¹ø ÆÄÀÏ µð½ºÅ©¸³ÅÍ·Î ÀúÀå.
exec 0<"$Filename"        # Ç¥ÁØÀÔ·ÂÀ» ÀçÁöÇâ.

count=0
echo


while [ "$name" != Smith ]
do
  read name               # ÀçÁöÇâµÈ Ç¥ÁØÀÔ·Â($Filename)¿¡¼­ ÀÐÀ½.
  echo $name
  let "count += 1"
done <"$Filename"         # ·çÇÁ´Â $Filename ÆÄÀÏ¿¡¼­ ÀÔ·ÂÀ» ¹ÞÀ½.
#    ^^^^^^^^^^^^


exec 0<&3                 # ¿ø·¡ Ç¥ÁØÀÔ·ÂÀ» º¹±¸.
exec 3<&-                 # Àӽà ÆÄÀÏ µð½ºÅ©¸³ÅÍ 3¹øÀ» ´ÝÀ½.

echo; echo "$count °³ÀÇ À̸§À» Àоú½À´Ï´Ù."; echo

exit 0