Prep v221: Update and clean up build system to sync with upstream

This commit replays the moving around of source files that have been
done between systemd-219 and systemd-221.

Further the Makefile.am is synchronized with the upstream version and
then "re-cleaned".

A lot of functions, that are not used anywhere in elogind have been
coated into #if 0/#endif directives to further shorten the list of
dependencies.

All unneeded files have been removed.

1 files changed, 139 insertions, 0 deletions

diff --git a/src/basic/cgroup-util.h b/src/basic/cgroup-util.h
new file mode 100644
index 000000000..8a432aad0
--- /dev/null
+++ b/src/basic/cgroup-util.h
@@ -0,0 +1,139 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  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 <sys/types.h>
+#include <stdio.h>
+#include <dirent.h>
+
+#include "set.h"
+#include "def.h"
+
+/* A bit mask of well known cgroup controllers */
+typedef enum CGroupControllerMask {
+        CGROUP_CPU = 1,
+        CGROUP_CPUACCT = 2,
+        CGROUP_BLKIO = 4,
+        CGROUP_MEMORY = 8,
+        CGROUP_DEVICE = 16,
+        _CGROUP_CONTROLLER_MASK_ALL = 31
+} CGroupControllerMask;
+
+/*
+ * General rules:
+ *
+ * We accept named hierarchies in the syntax "foo" and "name=foo".
+ *
+ * We expect that named hierarchies do not conflict in name with a
+ * kernel hierarchy, modulo the "name=" prefix.
+ *
+ * We always generate "normalized" controller names, i.e. without the
+ * "name=" prefix.
+ *
+ * We require absolute cgroup paths. When returning, we will always
+ * generate paths with multiple adjacent / removed.
+ */
+
+int cg_enumerate_processes(const char *controller, const char *path, FILE **_f);
+int cg_read_pid(FILE *f, pid_t *_pid);
+
+int cg_enumerate_subgroups(const char *controller, const char *path, DIR **_d);
+int cg_read_subgroup(DIR *d, char **fn);
+
+int cg_kill(const char *controller, const char *path, int sig, bool sigcont, bool ignore_self, Set *s);
+int cg_kill_recursive(const char *controller, const char *path, int sig, bool sigcont, bool ignore_self, bool remove, Set *s);
+
+int cg_migrate(const char *cfrom, const char *pfrom, const char *cto, const char *pto, bool ignore_self);
+int cg_migrate_recursive(const char *cfrom, const char *pfrom, const char *cto, const char *pto, bool ignore_self, bool remove);
+int cg_migrate_recursive_fallback(const char *cfrom, const char *pfrom, const char *cto, const char *pto, bool ignore_self, bool rem);
+
+int cg_split_spec(const char *spec, char **controller, char **path);
+int cg_mangle_path(const char *path, char **result);
+
+int cg_get_path(const char *controller, const char *path, const char *suffix, char **fs);
+int cg_get_path_and_check(const char *controller, const char *path, const char *suffix, char **fs);
+
+int cg_pid_get_path(const char *controller, pid_t pid, char **path);
+
+int cg_trim(const char *controller, const char *path, bool delete_root);
+
+int cg_rmdir(const char *controller, const char *path);
+// UNNEEDED int cg_delete(const char *controller, const char *path);
+
+int cg_create(const char *controller, const char *path);
+int cg_attach(const char *controller, const char *path, pid_t pid);
+int cg_attach_fallback(const char *controller, const char *path, pid_t pid);
+int cg_create_and_attach(const char *controller, const char *path, pid_t pid);
+
+int cg_set_attribute(const char *controller, const char *path, const char *attribute, const char *value);
+int cg_get_attribute(const char *controller, const char *path, const char *attribute, char **ret);
+
+int cg_set_group_access(const char *controller, const char *path, mode_t mode, uid_t uid, gid_t gid);
+int cg_set_task_access(const char *controller, const char *path, mode_t mode, uid_t uid, gid_t gid);
+
+int cg_install_release_agent(const char *controller, const char *agent);
+int cg_uninstall_release_agent(const char *controller);
+
+int cg_is_empty(const char *controller, const char *path, bool ignore_self);
+int cg_is_empty_recursive(const char *controller, const char *path, bool ignore_self);
+
+int cg_get_root_path(char **path);
+
+int cg_path_get_session(const char *path, char **session);
+int cg_path_get_owner_uid(const char *path, uid_t *uid);
+int cg_path_get_unit(const char *path, char **unit);
+int cg_path_get_user_unit(const char *path, char **unit);
+int cg_path_get_machine_name(const char *path, char **machine);
+int cg_path_get_slice(const char *path, char **slice);
+int cg_path_get_user_slice(const char *path, char **slice);
+
+int cg_shift_path(const char *cgroup, const char *cached_root, const char **shifted);
+int cg_pid_get_path_shifted(pid_t pid, const char *cached_root, char **cgroup);
+
+int cg_pid_get_session(pid_t pid, char **session);
+// UNNEEDED int cg_pid_get_owner_uid(pid_t pid, uid_t *uid);
+int cg_pid_get_unit(pid_t pid, char **unit);
+// UNNEEDED int cg_pid_get_user_unit(pid_t pid, char **unit);
+// UNNEEDED int cg_pid_get_machine_name(pid_t pid, char **machine);
+int cg_pid_get_slice(pid_t pid, char **slice);
+int cg_pid_get_user_slice(pid_t pid, char **slice);
+
+int cg_path_decode_unit(const char *cgroup, char **unit);
+
+char *cg_escape(const char *p);
+char *cg_unescape(const char *p) _pure_;
+
+bool cg_controller_is_valid(const char *p);
+
+// UNNEEDED int cg_slice_to_path(const char *unit, char **ret);
+
+typedef const char* (*cg_migrate_callback_t)(CGroupControllerMask mask, void *userdata);
+
+int cg_create_everywhere(CGroupControllerMask supported, CGroupControllerMask mask, const char *path);
+int cg_attach_everywhere(CGroupControllerMask supported, const char *path, pid_t pid, cg_migrate_callback_t callback, void *userdata);
+int cg_attach_many_everywhere(CGroupControllerMask supported, const char *path, Set* pids, cg_migrate_callback_t callback, void *userdata);
+int cg_migrate_everywhere(CGroupControllerMask supported, const char *from, const char *to, cg_migrate_callback_t callback, void *userdata);
+int cg_trim_everywhere(CGroupControllerMask supported, const char *path, bool delete_root);
+
+CGroupControllerMask cg_mask_supported(void);
+
+int cg_kernel_controllers(Set *controllers);