Convert Windows line endings to Unix

#!/bin/bash

# from http://sed.sf.net/sed1line.txt:
# 
# sed 's/.$//'                    # assumes that all lines end with CR/LF
# sed 's/$'"/`echo \\\r`/"   # command line under bash

if [ ! -f "$1" ]; then
  echo "Usage: `basename $0` filename"
  echo "  `basename $0` converts between DOS and UNIX formats."
  echo "  When called as unix2dos, it converts to DOS format."
  echo "  Otherwise, it converts to UNIX format."
  exit 1
fi

case `basename $0` in
  unix2dos)
    sed -i 's/$'"/`echo \\\r`/" $1
    exit $?
    ;;
  *) # Default to being dos2unix
    sed -i 's/.$//' $1
    exit $?
    ;;
esac
exit 0