Perl5 リファレンス

       lstat FILEHANDLE

       lstat EXPR

       lstat   Does the same thing as the `stat' function
               (including setting the special `_' filehandle) but
               stats a symbolic link instead of the file the
               symbolic link points to.  If symbolic links are
               unimplemented on your system, a normal `stat' is

               If EXPR is omitted, stats `$_'.