sysext: make some calls available via varlink

units/meson.build

@@ -529,6 +529,15 @@ units = [
           'file' : 'systemd-sysext.service',
           'conditions' : ['ENABLE_SYSEXT'],
         },
+        {
+          'file' : 'systemd-sysext.socket',
+          'conditions' : ['ENABLE_SYSEXT'],
+          'symlinks' : ['sockets.target.wants/'],
+        },
+        {
+          'file' : 'systemd-sysext@.service',
+          'conditions' : ['ENABLE_SYSEXT'],
+        },
         {
           'file' : 'systemd-sysupdate-reboot.service.in',
           'conditions' : ['ENABLE_SYSUPDATE'],

units/systemd-sysext.socket

@@ -0,0 +1,25 @@
+#  SPDX-License-Identifier: LGPL-2.1-or-later
+#
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+
+[Unit]
+Description=System Extension Image Management (Varlink)
+Documentation=man:systemd-sysext(8)
+DefaultDependencies=no
+After=local-fs.target
+Before=sockets.target
+ConditionCapability=CAP_SYS_ADMIN
+
+[Socket]
+ListenStream=/run/systemd/io.systemd.sysext
+FileDescriptorName=varlink
+SocketMode=0600
+Accept=yes
+
+[Install]
+WantedBy=sockets.target

units/systemd-sysext@.service

@@ -0,0 +1,20 @@
+#  SPDX-License-Identifier: LGPL-2.1-or-later
+#
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+
+[Unit]
+Description=System Extension Image Management (Varlink)
+Documentation=man:systemd-sysext(8)
+DefaultDependencies=no
+After=local-fs.target
+Conflicts=shutdown.target initrd-switch-root.target
+Before=shutdown.target initrd-switch-root.target
+
+[Service]
+Environment=LISTEN_FDNAMES=varlink
+ExecStart=-systemd-sysext