[debbugs-tracker] bug#26809: closed (08/09: services: nscd: Create /etc/resolv.conf if it does not exist.)

[GNU bug Tracking System]

Your message dated Mon, 08 May 2017 16:30:06 +0200
with message-id <address@hidden>
and subject line Re: bug#26809: 08/09: services: nscd: Create /etc/resolv.conf 
if it does not exist.
has caused the debbugs.gnu.org bug report #26809,
regarding 08/09: services: nscd: Create /etc/resolv.conf if it does not exist.
to be marked as done.

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-- 
26809: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=26809
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> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: 08/09: services: nscd: Create /etc/resolv.conf if it does not exist.
>
>
>
>
> Date: 
>
> Sun, 07 May 2017 00:19:33 -0400
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>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux)
>
>
>
>
> address@hidden (Ludovic Courtès) writes:
>
> > civodul pushed a commit to branch master
> > in repository guix.
> >
> > commit 49f9d7f697d19870f01104cdb6a90a32aea87679
> > Author: Ludovic Courtès <address@hidden>
> > Date:   Tue May 2 12:21:31 2017 +0200
> >
> >     services: nscd: Create /etc/resolv.conf if it does not exist.
> >     
> >     * gnu/services/base.scm (nscd-activation): Create /etc/resolv.conf if it
> >     does not exist yet.
>
> This commit broke the boot process on my system.  The problem is that
> I'm using Network Manager, which makes /etc/resolv.conf into a symlink
> that points to /var/run/NetworkManager/resolv.conf.  Since /var/run is
> cleaned during early boot, when this new activation code runs,
> /etc/resolv.conf is a broken symlink.
>
> I guess that 'file-exists?' returns #false for a broken symlink, and the
> 'call-with-output-file' tries to open the target of the symlink, which
> fails.
>
>        Mark
>
>
> > diff --git a/gnu/services/base.scm b/gnu/services/base.scm
> > index 67972bf..a64faa0 100644
> > --- a/gnu/services/base.scm
> > +++ b/gnu/services/base.scm
> > @@ -1149,7 +1149,14 @@ the tty to run, among other things."
> >    #~(begin
> >        (use-modules (guix build utils))
> >        (mkdir-p "/var/run/nscd")
> > -      (mkdir-p "/var/db/nscd")))                  ;for the persistent cache
> > +      (mkdir-p "/var/db/nscd")                    ;for the persistent cache
> > +
> > +      ;; In libc 2.25 nscd uses inotify to watch /etc/resolv.conf, but only 
> > if
> > +      ;; that file exists when it is started.  Thus create it here.
> > +      (unless (file-exists? "/etc/resolv.conf")
> > +        (call-with-output-file "/etc/resolv.conf"
> > +          (lambda (port)
> > +            (display "# This is a placeholder.\n" port))))))
> >  
> >  (define nscd-service-type
> >    (service-type (name 'nscd)
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#26809: 08/09: services: nscd: Create /etc/resolv.conf if it does not exist.
>
>
>
>
> Date: 
>
> Mon, 08 May 2017 16:30:06 +0200
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux)
>
>
>
>
> Mark H Weaver <address@hidden> skribis:
>
> > address@hidden (Ludovic Courtès) writes:
> >
> >> civodul pushed a commit to branch master
> >> in repository guix.
> >>
> >> commit 49f9d7f697d19870f01104cdb6a90a32aea87679
> >> Author: Ludovic Courtès <address@hidden>
> >> Date:   Tue May 2 12:21:31 2017 +0200
> >>
> >>     services: nscd: Create /etc/resolv.conf if it does not exist.
> >>     
> >>     * gnu/services/base.scm (nscd-activation): Create /etc/resolv.conf if it
> >>     does not exist yet.
> >
> > This commit broke the boot process on my system.  The problem is that
> > I'm using Network Manager, which makes /etc/resolv.conf into a symlink
> > that points to /var/run/NetworkManager/resolv.conf.  Since /var/run is
> > cleaned during early boot, when this new activation code runs,
> > /etc/resolv.conf is a broken symlink.
> >
> > I guess that 'file-exists?' returns #false for a broken symlink, and the
> > 'call-with-output-file' tries to open the target of the symlink, which
> > fails.
>
> Indeed.  I guess this is fixed by
> c298fb133acbdc17e05a79c10ab9a9e214368264.
>
> Thanks,
> Ludo’.
>
>
> --- End Message ---