#! /bin/bash
#
# "lowercase.sh"¿¡ ±âÃÊÇØ ÀÛ¼ºµÈ ¾ÆÁÖ °£´ÜÇÑ ÆÄÀÏÀ̸§ "rename" À¯Æ¿¸®Æ¼.
#
#  Vladimir Lanin(lanin@csd2.nyu.edu)ÀÌ ¸¸µç "ren" À¯Æ¿¸®Æ¼°¡ 
#+ À̰ͺ¸´Ù ÈξÀ ´õ ÁÁ½À´Ï´Ù.


ARGS=2
E_BADARGS=65
ONE=1                     # ´Ü¼ö, º¹¼ö¸¦ ¹®¹ý¿¡ ¸Â°Ô ¾²·Á°í(¾Æ·¡¸¦ º¸¼¼¿ä).

if [ $# -ne "$ARGS" ]
then
  echo "»ç¿ë¹ý: `basename $0` old-pattern new-pattern"
  #  ¿¹¸¦ µé¾î "rn gif jpg" ¶ó°í Çϸé ÇöÀç µð·ºÅ丮ÀÇ ¸ðµç gif ÆÄÀÏÀÇ À̸§À» 
  #+ jpg ÆÄÀÏ·Î ¹Ù²ãÁÝ´Ï´Ù.
  exit $E_BADARGS
fi

number=0                  # ½ÇÁ¦·Î ¾ó¸¶³ª ¸¹Àº ÆÄÀÏÀ̸§ÀÌ ¹Ù²î¾ú´ÂÁö¸¦ ´ã°í ÀÖÀ» º¯¼ö.


for filename in *$1*      # µð·ºÅ丮¿¡¼­ ÀÏÄ¡ÇÏ´Â ¸ðµç ÆÄÀÏÀ» Ž»ö.
do
   if [ -f "$filename" ]  # ã¾Ò´Ù¸é...
   then
     fname=`basename $filename`            # °æ·Î¸¦ ¶¼¾î³»°í,
     n=`echo $fname | sed -e "s/$1/$2/"`   # »õ À̸§À¸·Î ¹Ù²Û ´ÙÀ½,
     mv $fname $n                          # À̸§ ¹Ù²Þ.
     let "number += 1"
   fi
done   

if [ "$number" -eq "$ONE" ]                # ¹®¹ý¿¡ ¸Â°Ô ÇÏ·Á°í
then
 echo "$number °³ÀÇ ÆÄÀÏÀ̸§ÀÌ ¹Ù²î¾ú½À´Ï´Ù."
else 
 echo "$number °³ÀÇ ÆÄÀÏÀ̸§µéÀÌ ¹Ù²î¾ú½À´Ï´Ù."
fi 

exit 0


# µ¶ÀÚµéÀ» À§ÇÑ ¿¬½À¹®Á¦:
# ¾î¶² Á¾·ùÀÇ ÆÄÀÏÀÏ °æ¿ì¿¡ ÀÌ ½ºÅ©¸³Æ®°¡ Á¦´ë·Î µ¿ÀÛÇÏÁö ¾ÊÀ»±î¿ä?
# ±×·± ÆÄÀÏÀ» ó¸®ÇÏ·Á¸é ¾î¶»°Ô °íÄ¡ÁÒ?