http://kernel.org/doc/man-pages/online/pages/man2/uname.2.html It says the length of the fields was unspecified. Initially I thought that meant it was implemented as each field starting right after the previous one's null terminator, but it turns out that each field is exactly 65 characters long. This is hardwired into both bits/utsname.h and linux/utsname.h, and more to the point you can't talk to the kernel without knowing what this value _is_, so leaving it unspecified is silly. It's part of the current kernel's binary abi, and the value is currently 65. Rob -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html