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Bug#966138: Package: connman sysvint script disables DNS lookups when resolvconf package installed

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  Bug#966138: Package: connman sysvint script disables DNS lookups when resolvconf package installed Vernon Van Steenkist <vernonjvs@gmail.com> - 2020-07-23 17:50 +0200
    Bug#966138: connman sysvrc script Tom H <tomh0665@gmail.com> - 2020-07-26 21:10 +0200

#1019032 — Bug#966138: Package: connman sysvint script disables DNS lookups when resolvconf package installed

Package: connman
Version: 1.36-2

Beowulf connman 1.36-2 i386 sysvinit script conflicts with resolvconf 1.79 package leaving the system in a state unable to do DNS lookups.

Problem one:

sed -n "22,25p" /etc/init.d/connman

if [ "CONNMAN_RUNSTATEDIR_RESOLVCONF" != "no" ] ; then
     mkdir -p /run/connman
     ln -sf /run/connman/resolv.conf /etc/
fi

Since string CONNMAN_RUNSTATEDIR_RESOLVCONF will never be equal to string no, the following line will always be executed
ln -sf /run/connman/resolv.conf /etc/


So, I am not what conditional

if [ "CONNMAN_RUNSTATEDIR_RESOLVCONF" != "no" ]

is supposed to accomplish.

Problem Two:

This creates a problem when using the resolvconf package. Package resolvconf links /etc/resolv.conf to
/run/resolvconf/resolv.conf However, after re-boot, /etc/init.d/connman overwrites this link and links
/etc/resolv.conf to /run/connman/resolv.conf
once again leaving the system in a state unable to do DNS look-ups.

I have brute forced a fix by commenting out the line
ln -sf /run/connman/resolv.conf /etc/ in /etc/init.d/connman

sed -n "22,25p" /etc/init.d/connman

if [ "CONNMAN_RUNSTATEDIR_RESOLVCONF" != "no" ] ; then
     mkdir -p /run/connman
#    ln -sf /run/connman/resolv.conf /etc/
fi

and re-linking /etc/resolv.conf to /run/resolvconf/resolv.conf

I am not sure what the correct fix should be.

Please don't hesitate to contact me if you have any questions.

Thanks,
Vernon

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#1019384 — Bug#966138: connman sysvrc script

I don't use connman, but I was intrigued by this bug, so I replaced
ifupdown in a VM with connman.

1) connman is taking over the resolv.conf symlink because it provides
an inbuilt dns caching server and assumes that the user wants to use
it by default.

2) The package could ship "/etc/default/connman" with
"CONNMAN_RUNSTATEDIR_RESOLVCONF=no" to reverse the current sysvrc
default. It would then diverge from the systemd default, whose service
unit doesn't source "/etc/default/connman" and sets up the resolv.conf
symlink via "[/usr]/lib/tmpfiles.d/connman_resolvconf.conf".

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