[PATCH 1/1] systemd.bbclass: check whether systemctl works in post scripts

["kai" <kai.kang@windriver.com>]

From: Kai Kang <kai.kang@windriver.com>

When use a core image tarball as a docker image with 'docker import', it
fails to install/remove package which calls systemctl in post scripts.
Because it fais to run systemctl in a container:

bash-5.0# systemctl
System has not been booted with systemd as init system (PID 1). Can't operate.
Failed to connect to bus: Host is down

Replace 'type systemctl' with 'systemctl list-machines' in package post
scripts to check whether systemctl work rather than existence.

Signed-off-by: Kai Kang <kai.kang@windriver.com>
---
 meta/classes/systemd.bbclass | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/meta/classes/systemd.bbclass b/meta/classes/systemd.bbclass
index 9e8a82c9f1..9938425e2d 100644
--- a/meta/classes/systemd.bbclass
+++ b/meta/classes/systemd.bbclass
@@ -23,7 +23,7 @@ python __anonymous() {
 }
 
 systemd_postinst() {
-if type systemctl >/dev/null 2>/dev/null; then
+if systemctl list-machines >/dev/null 2>/dev/null; then
 	OPTS=""
 
 	if [ -n "$D" ]; then
@@ -48,7 +48,7 @@ fi
 }
 
 systemd_prerm() {
-if type systemctl >/dev/null 2>/dev/null; then
+if systemctl list-machines >/dev/null 2>/dev/null; then
 	if [ -z "$D" ]; then
 		systemctl stop ${SYSTEMD_SERVICE_ESCAPED}
 
-- 
2.17.1