Jorge Lucangeli Obes | 6f967c5 | 2015-12-04 14:44:53 -0800 | [diff] [blame] | 1 | // Copyright (C) 2015 The Android Open Source Project |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | #include <sys/types.h> |
| 16 | #include <sys/capability.h> |
| 17 | #include <unistd.h> |
| 18 | |
| 19 | #include <libminijail.h> |
| 20 | |
Elliott Hughes | ce7e7c3 | 2015-12-08 08:54:43 -0800 | [diff] [blame] | 21 | #include <android-base/logging.h> |
Mike Frysinger | 404d2bb | 2017-01-17 19:29:00 -0500 | [diff] [blame] | 22 | #include <android-base/macros.h> |
Jorge Lucangeli Obes | 6f967c5 | 2015-12-04 14:44:53 -0800 | [diff] [blame] | 23 | |
| 24 | gid_t groups[] = { 1001, 1002 }; |
| 25 | |
| 26 | void log_resugid() { |
| 27 | uid_t ruid, euid, suid; |
| 28 | gid_t rgid, egid, sgid; |
| 29 | getresuid(&ruid, &euid, &suid); |
| 30 | getresgid(&rgid, &egid, &sgid); |
| 31 | |
| 32 | LOG(INFO) << "ruid " << ruid << " euid " << euid << " suid " << suid; |
| 33 | LOG(INFO) << "rgid " << rgid << " egid " << egid << " sgid " << sgid; |
| 34 | |
| 35 | int nsupp_groups = getgroups(0, NULL); |
| 36 | if (nsupp_groups < 0) { |
| 37 | PLOG(FATAL) << "getgroups(0)"; |
| 38 | } |
| 39 | if (nsupp_groups == 0) { |
| 40 | LOG(INFO) << "no supplemental groups"; |
| 41 | return; |
| 42 | } |
| 43 | |
| 44 | gid_t *list = (gid_t*)calloc((size_t)nsupp_groups, sizeof(gid_t)); |
| 45 | nsupp_groups = getgroups(nsupp_groups, list); |
| 46 | if (nsupp_groups < 0) { |
| 47 | PLOG(FATAL) << "getgroups(nsupp_groups)"; |
| 48 | } |
| 49 | for (size_t i = 0; i < (size_t)nsupp_groups; i++) { |
| 50 | LOG(INFO) << "supp gid " << i + 1 << " " << list[i]; |
| 51 | } |
Jorge Lucangeli Obes | ac9e342 | 2016-02-03 15:00:42 -0800 | [diff] [blame] | 52 | free(list); |
Jorge Lucangeli Obes | 6f967c5 | 2015-12-04 14:44:53 -0800 | [diff] [blame] | 53 | } |
| 54 | |
| 55 | int main(void) { |
| 56 | log_resugid(); |
| 57 | minijail *j = minijail_new(); |
| 58 | minijail_change_user(j, "system"); |
| 59 | minijail_change_group(j, "system"); |
Mike Frysinger | 404d2bb | 2017-01-17 19:29:00 -0500 | [diff] [blame] | 60 | minijail_set_supplementary_gids(j, arraysize(groups), groups); |
Jorge Lucangeli Obes | 6f967c5 | 2015-12-04 14:44:53 -0800 | [diff] [blame] | 61 | // minijail_use_caps(j, CAP_TO_MASK(CAP_SETUID) | CAP_TO_MASK(CAP_SETGID)); |
Jorge Lucangeli Obes | b98ad29 | 2016-01-25 15:07:30 -0800 | [diff] [blame] | 62 | // minijail_use_seccomp_filter(j); |
| 63 | // minijail_log_seccomp_filter_failures(j); |
| 64 | // minijail_parse_seccomp_filters(j, "/data/filter.policy"); |
Jorge Lucangeli Obes | 6f967c5 | 2015-12-04 14:44:53 -0800 | [diff] [blame] | 65 | minijail_enter(j); |
| 66 | log_resugid(); |
| 67 | minijail_destroy(j); |
| 68 | // minijail *j2 = minijail_new(); |
| 69 | // minijail_change_uid(j2, 5000); |
| 70 | // minijail_change_gid(j2, 5000); |
| 71 | // minijail_enter(j2); |
| 72 | // log_resugid(); |
| 73 | return 0; |
| 74 | } |