Let systemd create /var/lib/upower

This directory may not exist when cleaning out /var (e. g. on stateless
systems). As upowerd cannot mkdir it by itself due to `ProtectSystem`,
let systemd create it via `StateDirectory`.

Keep `ReadWritePaths` and the `mkdir` in the Makefile to continue to
support a non-default `--historydir`.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/upower.service.in b/src/upower.service.in
index 4566ad3..16dcee5 100644
--- a/src/upower.service.in
+++ b/src/upower.service.in
@@ -14,6 +14,7 @@ ProtectSystem=strict
 ProtectKernelTunables=false
 ProtectControlGroups=true
 ReadWritePaths=@historydir@
+StateDirectory=upower
 ProtectHome=true
 PrivateTmp=true