Use DynamicUser instead of static users

To allow this, we need a more lenient policy for owning the service's name on the system bus.
endlessm · Feb 12, 2021 · d9243ed · d9243ed
1 parent 624c7c1
commit d9243ed
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Showing 11 changed files with 11 additions and 34 deletions.
diff --git a/data/dbus/org.learningequality.Kolibri.Daemon.conf.in b/data/dbus/org.learningequality.Kolibri.Daemon.conf.in
@@ -1,13 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?> <!-- -*- XML -*- -->
 <!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
 <busconfig>
-  <!-- Only @KOLIBRI_USER@ can own the service -->
-  <policy user="@KOLIBRI_USER@">
-    <allow own="@KOLIBRI_DAEMON_SERVICE@" />
-  </policy>
-
   <!-- Any user can call into the service -->
   <policy context="default">
+    <allow own="@KOLIBRI_DAEMON_SERVICE@" />
     <allow send_destination="@KOLIBRI_DAEMON_SERVICE@" send_interface="org.freedesktop.DBus.Introspectable" />
     <allow send_destination="@KOLIBRI_DAEMON_SERVICE@" send_interface="org.freedesktop.DBus.Properties" />
     <allow send_destination="@KOLIBRI_DAEMON_SERVICE@" send_interface="org.learningequality.Kolibri.Daemon" />

diff --git a/data/dbus/org.learningequality.Kolibri.Daemon.service.in b/data/dbus/org.learningequality.Kolibri.Daemon.service.in
@@ -1,5 +1,5 @@
 [D-BUS Service]
 Name=@KOLIBRI_DAEMON_SERVICE@
 Exec=/bin/false
-User=@KOLIBRI_USER@
+User=root
 SystemdService=dbus-@[email protected]
diff --git a/data/meson.build b/data/meson.build
@@ -1,6 +1,4 @@
 subdir('dbus')
 subdir('environment.d')
 subdir('systemd')
-subdir('sysusers.d')
-subdir('tmpfiles.d')
 
diff --git a/data/systemd/dbus-org.learningequality.Kolibri.Daemon.service.in b/data/systemd/dbus-org.learningequality.Kolibri.Daemon.service.in
@@ -6,5 +6,8 @@ ConditionPathExists=/var/lib/flatpak/app/@KOLIBRI_FLATPAK_ID@
 Type=dbus
 BusName=@KOLIBRI_DAEMON_SERVICE@
 ExecStart=@libexecdir@/eos-kolibri-daemon
+DynamicUser=yes
 User=@KOLIBRI_USER@
-PrivateTmp=yes
+RuntimeDirectory=kolibri
+StateDirectory=kolibri
+Environment=HOME=%t/kolibri
diff --git a/data/sysusers.d/eos-kolibri.conf.in b/data/sysusers.d/eos-kolibri.conf.in
diff --git a/data/sysusers.d/meson.build b/data/sysusers.d/meson.build
diff --git a/data/tmpfiles.d/eos-kolibri.conf.in b/data/tmpfiles.d/eos-kolibri.conf.in
diff --git a/data/tmpfiles.d/meson.build b/data/tmpfiles.d/meson.build
diff --git a/meson.build b/meson.build
@@ -66,7 +66,6 @@ eos_kolibri_config.set('libexecdir', libexecdir)
 eos_kolibri_config.set('PYTHON', 'python3')
 eos_kolibri_config.set('PYTHON_INSTALL_DIR', python_install_dir)
 eos_kolibri_config.set('KOLIBRI_USER', kolibri_user)
-eos_kolibri_config.set('KOLIBRI_USER_HOME', kolibri_user_home)
 eos_kolibri_config.set('KOLIBRI_DATA_DIR', kolibri_data_dir)
 eos_kolibri_config.set('KOLIBRI_FLATPAK_ID', kolibri_flatpak_id)
 eos_kolibri_config.set('KOLIBRI_DAEMON_SERVICE', kolibri_daemon_service)

diff --git a/meson_options.txt b/meson_options.txt
@@ -33,13 +33,6 @@ option(
     description: 'user to create for the system service'
 )
 
-option(
-    'kolibri_user_home',
-    type: 'string',
-    value: '',
-    description: 'home directory for the system user [default=$localstatedir/lib/kolibri]'
-)
-
 option(
     'kolibri_flatpak_id',
     type: 'string',

diff --git a/src/eos-kolibri-daemon.in b/src/eos-kolibri-daemon.in
@@ -1,6 +1,10 @@
 #!/bin/sh
 
-: ${KOLIBRI_HOME:="@KOLIBRI_DATA_DIR@"}
+: ${STATE_DIRECTORY:=/var/lib/kolibri}
+
+export KOLIBRI_HOME="${STATE_DIRECTORY}/data"
+
+mkdir -p "${KOLIBRI_HOME}"
 
 @bindir@/flatpak run \
    --no-desktop \