[PATCH blktests 01/10] common/rc: introduce _have_systemctl_unit()

[Shin'ichiro Kawasaki]

From: Hannes Reinecke <hare at suse.de>

To check that the test system has a specific systemctl unit, introduce
the new helper function _have_systemctl_unit.

Signed-off-by: Hannes Reinecke <hare at suse.de>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki at wdc.com>
---
 common/rc | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/common/rc b/common/rc
index bc6c2e4..ce7f975 100644
--- a/common/rc
+++ b/common/rc
@@ -500,6 +500,17 @@ _have_writeable_kmsg() {
 	return 0
 }
 
+_have_systemctl_unit() {
+	local unit="$1"
+
+	_have_program systemctl || return 1
+	if ! grep -qe "$unit" < <(systemctl list-unit-files); then
+		SKIP_REASONS+=("systemctl unit '${unit}' is missing")
+		return 1
+	fi
+	return 0
+}
+
 # Run the given command as NORMAL_USER
 _run_user() {
 	su "$NORMAL_USER" -c "$1"
-- 
2.49.0