From 16908e1ec833d857cb418712c382c6f604426b36 Mon Sep 17 00:00:00 2001

From: Frantisek Sumsal <frantisek@sumsal.cz>

Date: Tue, 1 Feb 2022 20:18:29 +0100

Subject: [PATCH] test: introduce `get_cgroup_hierarchy() helper

which returns the host's cgroup hierarchy (unified, hybrid, or legacy).

(cherry picked from commit f723740871bd3eb89d16a526a1ff77c04bb3787a)

Related: #2047768

---

 test/test-functions | 18 ++++++++++++++++++

 1 file changed, 18 insertions(+)

diff --git a/test/test-functions b/test/test-functions

index 35d8f074a9..4827b6bedf 100644

--- a/test/test-functions

+++ b/test/test-functions

@@ -1996,6 +1996,24 @@ import_initdir() {

     export initdir

 }

+get_cgroup_hierarchy() {

+    case "$(stat -c '%T' -f /sys/fs/cgroup)" in

+        cgroup2fs)

+            echo "unified"

+            ;;

+        tmpfs)

+            if [[ -d /sys/fs/cgroup/unified && "$(stat -c '%T' -f /sys/fs/cgroup/unified)" == cgroup2fs ]]; then

+                echo "hybrid"

+            else

+                echo "legacy"

+            fi

+            ;;

+        *)

+            dfatal "Failed to determine host's cgroup hierarchy"

+            exit 1

+    esac

+}

+

 ## @brief Converts numeric logging level to the first letter of level name.

 #

 # @param lvl Numeric logging level in range from 1 to 6.