misc/170503: freebsd-update mirror finding is case sensitive

Wybe van der Ham wybe at snth.eu
Thu Aug 9 14:50:02 UTC 2012

>Number:         170503
>Category:       misc
>Synopsis:       freebsd-update mirror finding is case sensitive
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Aug 09 14:50:01 UTC 2012
>Originator:     Wybe van der Ham
>Release:        8.3
FreeBSD testmachine 8.3-RELEASE FreeBSD 8.3-RELEASE #0: Mon Apr  9 21:47:23 UTC 2012     root at almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386
The freebsd-update script tries to find mirrors using SRV records. My Mikrotik router with built-in nameserver gives the following output:
# host -t srv _http._tcp.update.FreeBSD.org
_http._tcp.update.freebsd.org has SRV record 1 35 80 update4.FreeBSD.org.
_http._tcp.update.freebsd.org has SRV record 1 50 80 update5.FreeBSD.org.
_http._tcp.update.freebsd.org has SRV record 1 5 80 update3.FreeBSD.org.

The first part is converted to lowercase. The freebsd-update script checks (with sed) for "_http._tcp.update.FreeBSD.org", but that does not match the lowercase output.
freebsd-update is unable to find the mirrors, and freebsd-update fails.

The workaround for this problem is to change the Servername in /etc/freebsd-update.conf to all lowercase.
Use a mikrotik router as nameserver or any other nameserver that returns the requested hostname in lowercase instead of the original casing.
Make the regular expression - used to strip away the "_http._tcp.update.freebsd.org has SRV record " - case insensitive:

sed -nE "s/${MLIST} (has SRV record|server selection) //p"
sed -nE "s/${MLIST} (has SRV record|server selection) //Ip"


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