Method Stdio.file_size()

Method file_size: int file_size(string filename)
Description: Give the size of a file. Size -1 indicates that the file either does not exist, or that it is not readable by you. Size -2 indicates that it is a directory, -3 that it is a symlink and -4 that it is a device.
See also: file_stat() , write_file() , read_bytes()