fread_record
if ((rv = fread_record(&av2, sizeof(av2), f)) == EOF)
return (fread_record(av3, sizeof(*av3), f));
if (fread_record(&magic, sizeof(magic), f) == EOF ||
fread_record(&version, sizeof(version), f) == EOF ||
fread_record(&len, sizeof(len), f) == EOF ||
if ((rv = fread_record(&av1, sizeof(av1), f)) == EOF)