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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
8c759b33 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2017 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include "test-helper.h" | |
22 | #include "random-util.h" | |
23 | #include "alloc-util.h" | |
24 | #include "cgroup-util.h" | |
25 | ||
651d47d1 | 26 | int enter_cgroup_subroot(void) { |
8c759b33 LP |
27 | _cleanup_free_ char *cgroup_root = NULL, *cgroup_subroot = NULL; |
28 | CGroupMask supported; | |
651d47d1 ZJS |
29 | int r; |
30 | ||
31 | r = cg_pid_get_path(NULL, 0, &cgroup_root); | |
32 | if (r == -ENOMEDIUM) | |
33 | return log_warning_errno(r, "cg_pid_get_path(NULL, 0, ...) failed: %m"); | |
34 | assert(r >= 0); | |
8c759b33 | 35 | |
8c759b33 LP |
36 | assert_se(asprintf(&cgroup_subroot, "%s/%" PRIx64, cgroup_root, random_u64()) >= 0); |
37 | assert_se(cg_mask_supported(&supported) >= 0); | |
38 | ||
39 | /* If this fails, then we don't mind as the later cgroup operations will fail too, and it's fine if we handle | |
40 | * any errors at that point. */ | |
41 | ||
651d47d1 ZJS |
42 | r = cg_create_everywhere(supported, _CGROUP_MASK_ALL, cgroup_subroot); |
43 | if (r < 0) | |
44 | return r; | |
8c759b33 | 45 | |
651d47d1 | 46 | return cg_attach_everywhere(supported, cgroup_subroot, 0, NULL, NULL); |
8c759b33 | 47 | } |