SYNOPSIS
#include <sys/files.h>
int file_size(string file)
DESCRIPTION
Returns the size of the file in bytes.
Size FSIZE_NOFILE (-1) indicates that the file either does not exist,
or that it is not readable for the calling object/user.
Size FSIZE_DIR (-2) indicates that it is a directory.
SEE ALSO
write_file(E), cat(E), get_dir(E)