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bug#26809: 08/09: services: nscd: Create /etc/resolv.conf if it does not
Mark H Weaver
bug#26809: 08/09: services: nscd: Create /etc/resolv.conf if it does not exist.
Sun, 07 May 2017 00:19:33 -0400
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
> 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."
> (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
> + ;; 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)
- bug#26809: 08/09: services: nscd: Create /etc/resolv.conf if it does not exist.,
Mark H Weaver <=