On Sat, 27 Apr 2019, Paul Goyette wrote:
So, I decided to try a little bit harder. I installed a stock 8.0 system in a qemu vm, and then loaded 5.2's base.tgz into a chroot directory.Using the stock 8.0 ifconfig, I see # ifconfig -l wm0 lo0 # ifconfig -a wm0: flags=0x8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500 capabilities=2bf80<TSO4,IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx> capabilities=2bf80<TCP4CSUM_Tx,UDP4CSUM_Rx,UDP4CSUM_Tx,TCP6CSUM_Tx> capabilities=2bf80<UDP6CSUM_Tx> enabled=0 ec_capabilities=7<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU> ec_enabled=0 address: 52:54:00:12:34:56 media: Ethernet autoselect (none) lo0: flags=0x8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33624 inet 127.0.0.1/8 flags 0x0 inet6 ::1/128 flags 0x20<NODAD> inet6 fe80::1%lo0/64 flags 0x0 scopeid 0x2 When I chroot into the 5.2 directory, I get no output of any sort: # chroot /chroot-52/ # ifconfig -l # ifconfig -a So, there's definitely something wrong in 8.0 with the compat sysctl.I probably changed the behavior with my work on the compat branch, which is likely why -current gets ENOENT errors.
OK, I dug a little bit further, and I know why there is a difference
between 8.0 and -current. Yep, I broke it on the [pgoyette-compat]
branch. I will see if I can fix it. (Please note that real-life is
getting very complex right now, and I don't know how soon I will be
able to work on this.)
(Short version is that I removed the code that created multiple
versions of the sysctl nodes.)
I still cannot explain how things got broken between 5.2 and 8.0. I
will defer to those who are more expert in this area than am I. My
suspicion is that the breakage is related to sys/socket.h rev 1.99
which versioned AF_{,O}ROUTE for some 64-bit cleanliness.
+--------------------+--------------------------+-----------------------+
| Paul Goyette | PGP Key fingerprint: | E-mail addresses: |
| (Retired) | FA29 0E3B 35AF E8AE 6651 | paul%whooppee.com@localhost |
| Software Developer | 0786 F758 55DE 53BA 7731 | pgoyette%netbsd.org@localhost |
+--------------------+--------------------------+-----------------------+