1 files changed, 109 insertions, 0 deletions
diff --git a/src/libsystemd-basic/include/systemd-basic/cgroup2-util.h b/src/libsystemd-basic/include/systemd-basic/cgroup2-util.h
new file mode 100644
index 0000000000..cdbd9b0d9b
--- /dev/null
+++ b/src/libsystemd-basic/include/systemd-basic/cgroup2-util.h
@@ -0,0 +1,109 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+  Copyright 2017 Luke Shumaker
+
+  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.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "macro.h"
+
+/* generic types ****************************************************/
+
+typedef struct CGroupHierarchy CGroupHierarchy;
+
+typedef struct CGroup {
+        CGroupHierarchy *hierarchy;
+        char *path;
+} CGroup;
+
+static inline void cg2_freep(CGroup *cgroup) {
+        free(cgroup->path);
+}
+
+static inline void cg2_free_freep(CGroup **cgroupp) {
+        if (*cgroupp) {
+                cg2_freep(*cgroupp);
+                free(*cgroupp);
+        }
+}
+
+#define _cleanup_cgroupfree_ _cleanup_(cg2_freep)
+#define _cleanup_cgroupfree_free_ _cleanup_(cg2_free_freep)
+
+/* generic functions ************************************************/
+
+int cg2_flush(void);
+bool cg2_ns_supported(void);
+
+int cg2_get_v1_hier(const char *controller, CGroupHierarchy **ret_hier);
+int cg2_get_v2_hier(CGroupHierarchy **ret_hier);
+int cg2_hier_get_version(CGroupHierarchy *hier);
+char *cg2_hier_get_str(CGroupHierarchy *hier);
+
+int cg2_pid_get_cgroups_real(pid_t pid, /* CGroupHierarchy *hier, CGroup *ret_cgroup */...) _sentinel_;
+#define cg2_pid_get_cgroups(pid, ...) cg2_pid_get_cgroups_real((pid), __VA_ARGS__, NULL)
+
+char *cg2_cgroup_get_filepath(CGroup cgroup);
+char *cg2_cgroup_get_str(CGroup cgroup);
+
+/* systemd types ****************************************************/
+
+typedef struct SdCGroup {
+        CGroup prefix;
+        char *path;
+} SdCGroup;
+
+static inline void cg2_sd_freep(SdCGroup *cgroup) {
+        cg2_freep(&cgroup->prefix);
+        free(cgroup->path);
+}
+
+static inline void cg2_sd_free_freep(SdCGroup **cgroupp) {
+        if (*cgroupp) {
+                cg2_sd_freep(*cgroupp);
+                free(*cgroupp);
+        }
+}
+
+#define _cleanup_sdcgroupfree_ _cleanup_(cg2_sd_freep)
+#define _cleanup_sdcgroupfree_free_ _cleanup_(cg2_sd_free_freep)
+
+typedef enum SdCGroupVersion {
+        CGROUP_VER_UNKNOWN = 0,
+        CGROUP_VER_1 = 1,
+        CGROUP_VER_2 = 2,           /* added in systemd 230 */
+        CGROUP_VER_MIXED_SD232 = 3, /* added in systemd 232 */
+        CGROUP_VER_MIXED_SD233 = 4, /* added in systemd 233 */
+} SdCGroupVersion;
+
+/* systemd functions ************************************************/
+
+int cg2_sd_flush(void);
+int cg2_sd_get_version(SdCGroupVersion *ret_ver);
+int cg2_sd_get_root(CGroup *ret_root);
+
+int cg2_sd_ver_get_hier_ver(SdCGroupVersion ver);
+
+int cg2_sd_pid_get_cgroup(pid_t pid, SdCGroup *ret_cgroup);
+
+int cg2_sd_cgroup_parse(SdCGroup cgroup, char **ret_slice, char **ret_unit, SdCGroup *ret_extra);
+int cg2_sd_cgroup_get_owner_uid(SdCGroup cgroup, uid_t *ret_uid);
+
+char *cg2_sd_cgroup_get_filepath(SdCGroup sdcgroup);
+char *cg2_sd_cgroup_get_cgpath(SdCGroup sdcgroup);
+char *cg2_sd_cgroup_get_str(SdCGroup sdcgroup);