Dear folks,
I'm unsure if the following constitutes a bug or if it's due to my local
configuration, so I mailed to openbsd-misc instead of openbsd-bugs:
I'm running a SPARCclassic (sparc platform) with OpenBSD 6.0-current
(builddate: 1467664848) served diskless via NFS. To keep things easy I
don't use different mount points for /usr, /var and others but only one
for the whole FS plus an extra file for swap space.
The last OpenBSD version I tested with this machine was 5.8-stable.
During bootup of the mentioned 6.0-current root FS I noticed a long
delay accompanied by the new (compared to 5.8) message "reordering
libraries: ". I first assumed this might be done for the first boot only
(like creating SSH keys), so I rebooted the machine only to recognize
that it's a persistent action. Searching for the mentioned string I
found out it originates from the reorder_libs() function in `/etc/rc`.
From the comments in reorder_libs() I see that this is actually not
intented to run if `/usr/lib` is on a NFS mounted file system - i.e.
this shouldn't happen in my case. But it looks like the detection does
not work as intended. The problem seems to be the first of the following
lines (line 2 and following from reorder_libs() (see [1] for the whole
`/etc/rc` file)):
```
local _dkdev=/dev/$(stat -L -f '%Sd' /usr/lib)
local _mp=$(mount | grep "^$_dkdev")
# Skip if /usr/lib is on a nfs mounted filesystem.
[[ $_mp == *' type nfs '* ]] && return
```
[1]:
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/etc/rc?rev=1.485&content-type=text/x-cvsweb-markup
Running the command substitution alone after the machine has finished
booting - which takes a considerable extra amount of time as the
SPARCclassic is a slow machine and its root FS is mounted via NFS -
gives the following in my case:
```
# stat -L -f '%Sd' /usr/lib
??
# echo $?
0
```
The only mounted file systems are:
```
# mount
192.168.178.9:/srv/nfs/sc-1/root on / type nfs (v3, udp, rdirsize=4096,
timeo=100, retrans=101)
192.168.178.9:/srv/nfs/openbsd/snapshots/1467664848/sparc/sc-1/swap on
/swap type nfs (v3, udp, timeo=100, retrans=101)
```
So searching for "^/dev/??" in the output of `mount` doesn't succeed and
the re-linking of the libraries is done anyhow. I'm not sure if the
output of the `stat` command is due to my local configuration but came
up with a different solution instead of the line mentioned above:
```
local _dkdev=$(df /usr/lib | tail -1 | cut -d ' ' -f 1)
```
This should give either the device (I cannot check this as I currently
don't have a machine running OpenBSD from disk, but the first column
should contain the device in this case AFAIK) or the NFS share where
`/usr/lib` is located, although it now needs three commands/subshells.
With the NFS share in the _dkdev variable the _mp variable will get the
correct line from the output of `mount`, the check if `/usr/lib` is on a
NFS mounted file system will succeed and the re-linking of the libs will
be skipped as intended.
Best regards
Frank Scheiner
