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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2017 Lennart Poettering
***/
#include "test-helper.h"
#include "random-util.h"
#include "alloc-util.h"
#include "cgroup-util.h"
int enter_cgroup_subroot(void) {
_cleanup_free_ char *cgroup_root = NULL, *cgroup_subroot = NULL;
CGroupMask supported;
int r;
r = cg_pid_get_path(NULL, 0, &cgroup_root);
if (r == -ENOMEDIUM)
return log_warning_errno(r, "cg_pid_get_path(NULL, 0, ...) failed: %m");
assert(r >= 0);
assert_se(asprintf(&cgroup_subroot, "%s/%" PRIx64, cgroup_root, random_u64()) >= 0);
assert_se(cg_mask_supported(&supported) >= 0);
/* If this fails, then we don't mind as the later cgroup operations will fail too, and it's fine if we handle
* any errors at that point. */
r = cg_create_everywhere(supported, _CGROUP_MASK_ALL, cgroup_subroot);
if (r < 0)
return r;
return cg_attach_everywhere(supported, cgroup_subroot, 0, NULL, NULL);
}
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