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<H1>[Mageia-dev] dhclient lease files location</H1>
<B>Colin Guthrie</B>
<A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20dhclient%20lease%20files%20location&In-Reply-To=%3C511378FD.3010503%40colin.guthr.ie%3E"
TITLE="[Mageia-dev] dhclient lease files location">mageia at colin.guthr.ie
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<I>Thu Feb 7 10:50:53 CET 2013</I>
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<PRE>'Twas brillig, and Guillaume Rousse at 07/02/13 08:37 did gyre and gimble:
><i> I'm taking this out of bugzilla for larger visibility:
</I>><i> <A HREF="https://bugs.mageia.org/show_bug.cgi?id=8391">https://bugs.mageia.org/show_bug.cgi?id=8391</A>
</I>><i>
</I>><i> Initiallly (mageia2), we had both dhcpd (the server) and dhclient (guess
</I>><i> what?) use a shared directory (/var/lib/dhcp), belonging to dhcp-common
</I>><i> package, to store their lease file. And I had this bugreport about
</I>><i> dhclient trying to store under a non-existent /var/lib/dhclient directory.
</I>><i>
</I>><i> I modified the dhcp package as in Fedora, to have each part
</I>><i> (client/server) use their own, self-provided, state directory to store
</I>><i> their lease file: /var/lib/dhcpd and /var/lib/dhclient. I expected to
</I>><i> fix the issue, and making life easier by mimicating fedora setup.
</I>><i>
</I>><i> Then Dave reported he now had the same error message as before, but with
</I>><i> the old directory: dhclient tries to store lease files under no more
</I>><i> existent /var/lib/dhcp directory...
</I>><i>
</I>><i> I grepped /etc for occurences of '/var/lib/dhcp', without results. I had
</I>><i> a look in networkmanager sources, which seems to be the culprit. It once
</I>><i> used C macro NM_DHCLIENT_STATE_DIRECTORY for this purpose, but not
</I>><i> anymore. Now, according to current code, it should uses its own state
</I>><i> directory (/var/lib/NetworkManager) to store those files, but that's
</I>><i> obviously not the case. And I'm myself having lease files in both
</I>><i> directories (/var/lib/dhclient and /var/lib/dhcp).
</I>><i>
</I>><i> I'm suspecting a mix of hardcoded or default configuration between dhcp
</I>><i> (the package), networkmanager and initscripts, but I can't figure where
</I>><i> exactly. If someone with more knowledge of those deep arcanes could
</I>><i> help, I'd be very grateful.
</I>
Certainly here with my NM launched dhclient processes, it passes the
"-lf /var/lib/dhcp/dhclient-$FOO-eth0.lease" argument to it.
What is also strange however is that NM doesn't build for me here. Seems
this was due to a commit by Olav to update it to 0.9.7.995
<A HREF="http://svnweb.mageia.org/packages?view=revision&revision=388631">http://svnweb.mageia.org/packages?view=revision&revision=388631</A>
<A HREF="http://svnweb.mageia.org/packages/cauldron/networkmanager/current/SPECS/networkmanager.spec?r1=388631&r2=388630&pathrev=388631">http://svnweb.mageia.org/packages/cauldron/networkmanager/current/SPECS/networkmanager.spec?r1=388631&r2=388630&pathrev=388631</A>
Interestingly the commit message is "SILENT: undo version change". Not
quite sure what to make of that. Can you elaborate on the version change
Olav? Perhaps I missed a mail somewhere asking for help rediffing a
patch or something? My memory is buggy :p
Anyway, going back to the 0.9.6.4 version (which is what is available as
built) and I find this via a quick grep:
[<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">colin at jimmy</A> NetworkManager-0.9.6.4]$ grep -rn --exclude=*.po "\.lease"
ChangeLog:19635: dhclient with "-lf /var/lib/dhcp/dhclient-%s.leases".
src/dhcp-manager/nm-dhcp-dhclient.c:95: return g_strdup_printf
("%s/dhclient%s-%s-%s.lease",
This uses NM_DHCLIENT_LEASE_DIR which is different to what you mentioned
above.
This appears to be the code in question:
#if defined(TARGET_DEBIAN) || defined(TARGET_SUSE) ||
defined(TARGET_MANDRIVA)
#if defined(DHCLIENT_V3)
#define NM_DHCLIENT_LEASE_DIR LOCALSTATEDIR "/lib/dhcp3"
#else
#define NM_DHCLIENT_LEASE_DIR LOCALSTATEDIR "/lib/dhcp"
#endif
#else
#define NM_DHCLIENT_LEASE_DIR LOCALSTATEDIR "/lib/dhclient"
#endif
I presume just removing the "|| defined(TARGET_MANDRIVA)" bit of the
first #if condition should do the trick.
I'd like to see what Olav had in mind with that commit first tho'. Seems
there are a few changes in NM that will mean we have to refactor things
a bit (it should use NMSTATEDIR in the newer code like you say and thus
be in it's own directory).
Col
--
Colin Guthrie
colin(at)mageia.org
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