int cg_create(const char *controller, const char *path, const char *suffix) {
_cleanup_free_ char *fs = NULL;
int r;
#ifdef HAVE_CGMANAGER
/* CGManager support */
int existed;
if (cgm_dbus_connect()) {
if (!controller) {
cgm_dbus_disconnect();
return -1;
}
r = cgm_create(normalize_controller(controller),
path, &existed);
cgm_dbus_disconnect();
if (!r)
return -1;
return 1;
}
#endif
r = cg_get_path_and_check(controller, path, suffix, &fs);
if (r < 0)
return r;
r = mkdir_parents_label(fs, 0755);
if (r < 0)
return r;
if (mkdir(fs, 0755) < 0) {
if (errno == EEXIST)
return 0;
return -errno;
}
return 1;
}
int cg_get_path_and_check(const char *controller, const char *path, const char *suffix, char **fs) {
const char *p;
int r;
assert(controller);
assert(fs);
if (isempty(controller))
return -EINVAL;
/* Normalize the controller syntax */
p = normalize_controller(controller);
/* Check if this controller actually really exists */
r = check(p);
if (r < 0)
return r;
return join_path(p, path, suffix, fs);
}
int cg_get_path(const char *controller, const char *path, const char *suffix, char **fs) {
const char *p;
static __thread bool good = false;
assert(fs);
if (_unlikely_(!good)) {
int r;
r = path_is_mount_point("/sys/fs/cgroup", false);
if (r <= 0)
return r < 0 ? r : -ENOENT;
/* Cache this to save a few stat()s */
good = true;
}
p = controller ? normalize_controller(controller) : NULL;
return join_path(p, path, suffix, fs);
}
