Ronald F. Guilmette <r...@tristatelogic.com> wrote: > > Second, I wish I undrstood your comment that the the files that appear > on my Ubuntu system and whose names begin with "libbind9" are "unrelated" > to the "real thing" (ISC) library of the same name.
There are a couple of events that make this confusing (the BIND4 -> BIND8 -> BIND9 transitions). Here's my understanding of the history - I'm probably wrong about the details but I think it's roughly the right shape. Back in the 4.3BSD days, there was a fairly close integration between BSD Unix and the classic Unix Internet daemons - sendmail, bind, syslog, rsh, inetd, etc. usw. and this got copied into many Internet software stacks because of the liberal license of the net/1 BSD release. So the classic libc resolver API is basically the BIND4 libbind, and the resolvers in glibc and the BSDs still descend from this codebase. BIND8 was a significant revision of the BIND code (e.g. the improved configuration syntax, support for DNS extensions) but I get the impression the library structure was not so different from BIND4. (Aside: why did 8 come after 4? The SCCS revision IDs in the BSD source repo were 4.x for 4.0BSD, 5.x for 4.1BSD ... 8.x for 4.4BSD, and 4.4BSD was around the time when projects like BIND and Sendmail spun out, so they took the 8.x version number with them.) BIND9 was a new codebase with very different internal library APIs, and an ambition to completely revamp the libc -> resolver interface - this is what the lwresd stuff was about. But no unix adopted this new design into its libc, so the ambition withered. So the name remained the same but the codebases are very different. (I could be very cheeky and compare perl4 / perl5 / perl6 :: bind4 / bind9 / bind10) Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at/ - I xn--zr8h punycode Irish Sea: Variable 3 or 4, becoming west or southwest 4 or 5, increasing 6 at times. Slight or moderate, occasionally smooth. Occasional rain. Good, occasionally poor. _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
