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nixos/nullmailer: Always adjust ownership of spool directories

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When switching between different NixOS configurations (with and
without nullmailer and other services), it can happen that the UID of
the nullmailer user changes. When it happens, the nullmailer service
happily starts, but the user cannot send any email, because the
sendmail wrapper doesn't have permission to write them to the queue.

This commit prevents that. Instead of creating the directories by the
nullmailer user, which doesn't have permissions to change ownership,
we now create them by the systemd-tmpfiles, which has sufficient
permissions to adjust ownership.
This commit is contained in:
Michal Sojka 2022-09-01 15:25:02 +02:00
parent a63021a330
commit 7e626703b0
1 changed files with 3 additions and 1 deletions
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4
nixos/modules/services/mail/nullmailer.nix
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@ -212,6 +212,9 @@ with lib;
systemd.tmpfiles.rules = [
"d /var/spool/nullmailer - ${cfg.user} - - -"
"d /var/spool/nullmailer/failed 750 ${cfg.user} - - -"
"d /var/spool/nullmailer/queue 750 ${cfg.user} - - -"
"d /var/spool/nullmailer/tmp 750 ${cfg.user} - - -"
];
systemd.services.nullmailer = {
@ -220,7 +223,6 @@ with lib;
after = [ "network.target" ];
preStart = ''
mkdir -p /var/spool/nullmailer/{queue,tmp,failed}
rm -f /var/spool/nullmailer/trigger && mkfifo -m 660 /var/spool/nullmailer/trigger
'';