7.5. The stat() Function
The stat function can be used to retrieve a 13-element array that gives status information for a given file or filehandle.
The syntax is:
($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size, $atime,$mtime,$ctime,$blksize,$blocks) = stat($filename);
Here, $mode is the file mode, $size is the size of the file, $atime is the last access time (in seconds since the epoch), $mtime is the last modification time.
For more information about stat consult perldoc -f stat or its entry in perlfunc.