* return an error for system processes. */
int sd_pid_get_owner_uid(pid_t pid, uid_t *uid);
-/* Get systemd unit (i.e. service) name from PID, for system
+/* Get systemd non-slice unit (i.e. service) name from PID, for system
* services. This will return an error for non-service processes. */
int sd_pid_get_unit(pid_t pid, char **unit);
-/* Get systemd unit (i.e. service) name from PID, for user
+/* Get systemd non-slice unit (i.e. service) name from PID, for user
* services. This will return an error for non-user-service
* processes. */
int sd_pid_get_user_unit(pid_t pid, char **unit);
+/* Get slice name from PID. */
+int sd_pid_get_slice(pid_t pid, char **slice);
+
+/* Get user slice name from PID. */
+int sd_pid_get_user_slice(pid_t pid, char **slice);
+
/* Get machine name from PID, for processes assigned to a VM or
* container. This will return an error for non-machine processes. */
int sd_pid_get_machine_name(pid_t pid, char **machine);
-/* Get slice name from PID. */
-int sd_pid_get_slice(pid_t pid, char **slice);
+/* Get the control group from a PID, relative to the root of the
+ * hierarchy. */
+int sd_pid_get_cgroup(pid_t pid, char **cgroup);
-/* Similar to sd_pid_get_session(), but retrieves data about peer of
- * connected AF_UNIX socket */
+/* Similar to sd_pid_get_session(), but retrieves data about the peer
+ * of a connected AF_UNIX socket */
int sd_peer_get_session(int fd, char **session);
-/* Similar to sd_pid_get_owner_uid(), but retrieves data about peer of
- * connected AF_UNIX socket */
+/* Similar to sd_pid_get_owner_uid(), but retrieves data about the peer of
+ * a connected AF_UNIX socket */
int sd_peer_get_owner_uid(int fd, uid_t *uid);
-/* Similar to sd_pid_get_unit(), but retrieves data about peer of
- * connected AF_UNIX socket */
+/* Similar to sd_pid_get_unit(), but retrieves data about the peer of
+ * a connected AF_UNIX socket */
int sd_peer_get_unit(int fd, char **unit);
-/* Similar to sd_pid_get_user_unit(), but retrieves data about peer of
- * connected AF_UNIX socket */
+/* Similar to sd_pid_get_user_unit(), but retrieves data about the peer of
+ * a connected AF_UNIX socket */
int sd_peer_get_user_unit(int fd, char **unit);
-/* Similar to sd_pid_get_machine_name(), but retrieves data about peer
- * of connected AF_UNIX socket */
+/* Similar to sd_pid_get_slice(), but retrieves data about the peer of
+ * a connected AF_UNIX socket */
+int sd_peer_get_slice(int fd, char **slice);
+
+/* Similar to sd_pid_get_user_slice(), but retrieves data about the peer of
+ * a connected AF_UNIX socket */
+int sd_peer_get_user_slice(int fd, char **slice);
+
+/* Similar to sd_pid_get_machine_name(), but retrieves data about the
+ * peer of a a connected AF_UNIX socket */
int sd_peer_get_machine_name(int fd, char **machine);
-/* Similar to sd_pid_get_slice(), but retrieves data about peer of
- * connected AF_UNIX socket */
-int sd_peer_get_slice(int fd, char **slice);
+/* Similar to sd_pid_get_cgroup(), but retrieves data about the peer
+ * of a connected AF_UNIX socket. */
+int sd_peer_get_cgroup(pid_t pid, char **cgroup);
/* Get state from UID. Possible states: offline, lingering, online, active, closing */
int sd_uid_get_state(uid_t uid, char **state);
/* Return seats of user is on. If require_active is true, this will look for
* active seats only. Returns the number of seats.
- * If seats is NULL, this will just return the number of seats.*/
+ * If seats is NULL, this will just return the number of seats. */
int sd_uid_get_seats(uid_t uid, int require_active, char ***seats);
/* Return 1 if the session is active. */