From the NannyMUD documentation

LAST CHANGE

2000-12-09

FUNCTION

NAME
        file_size - Return the size of a file.


SYNTAX
	int file_size(string path)

DESCRIPTION
	This function is used to determine the size of an existing file.


RETURN VALUES
	-1 - File does not exist.
	-2 - File is actually a directory, and not a file.
	other - The file size in bytes.


EXAMPLE
	file_size("/obj/player.c") - Would return a number around 170000.


SEE ALSO
        file_name in efun/object_related/file_name