Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "service.h" |
| 18 | |
| 19 | #include <fcntl.h> |
Elliott Hughes | 9605a94 | 2016-11-10 17:43:47 -0800 | [diff] [blame] | 20 | #include <inttypes.h> |
Jorge Lucangeli Obes | 24b2913 | 2016-10-27 10:33:03 -0400 | [diff] [blame] | 21 | #include <linux/securebits.h> |
Jorge Lucangeli Obes | 1b3fa3d | 2016-04-21 15:35:09 -0700 | [diff] [blame] | 22 | #include <sched.h> |
Jorge Lucangeli Obes | 1b3fa3d | 2016-04-21 15:35:09 -0700 | [diff] [blame] | 23 | #include <sys/prctl.h> |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 24 | #include <sys/stat.h> |
Vitalii Tomkiv | 081705c | 2016-05-18 17:36:30 -0700 | [diff] [blame] | 25 | #include <sys/time.h> |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 26 | #include <termios.h> |
Dan Albert | af9ba4d | 2015-08-11 16:37:04 -0700 | [diff] [blame] | 27 | #include <unistd.h> |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 28 | |
Elliott Hughes | 4f71319 | 2015-12-04 22:00:26 -0800 | [diff] [blame] | 29 | #include <android-base/file.h> |
Tom Cherry | 3f5eaae5 | 2017-04-06 16:30:22 -0700 | [diff] [blame] | 30 | #include <android-base/logging.h> |
Elliott Hughes | dc80312 | 2018-05-24 18:00:39 -0700 | [diff] [blame] | 31 | #include <android-base/properties.h> |
Tom Cherry | 60971e6 | 2019-09-10 10:40:47 -0700 | [diff] [blame] | 32 | #include <android-base/scopeguard.h> |
Elliott Hughes | 4f71319 | 2015-12-04 22:00:26 -0800 | [diff] [blame] | 33 | #include <android-base/stringprintf.h> |
Elliott Hughes | f86b5a6 | 2016-06-24 15:12:21 -0700 | [diff] [blame] | 34 | #include <android-base/strings.h> |
Tom Cherry | 2e4c85f | 2019-07-09 13:33:36 -0700 | [diff] [blame] | 35 | #include <cutils/sockets.h> |
Tom Cherry | 3f5eaae5 | 2017-04-06 16:30:22 -0700 | [diff] [blame] | 36 | #include <processgroup/processgroup.h> |
| 37 | #include <selinux/selinux.h> |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 38 | |
Suren Baghdasaryan | c29c2ba | 2019-10-22 17:18:42 -0700 | [diff] [blame] | 39 | #include "lmkd_service.h" |
Tom Cherry | 2aeb1ad | 2019-06-26 10:46:20 -0700 | [diff] [blame] | 40 | #include "service_list.h" |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 41 | #include "util.h" |
| 42 | |
Tom Cherry | de6bd50 | 2018-02-13 16:50:08 -0800 | [diff] [blame] | 43 | #if defined(__ANDROID__) |
Jiyong Park | d7f7c20 | 2019-05-10 21:12:15 +0900 | [diff] [blame] | 44 | #include <ApexProperties.sysprop.h> |
Tom Cherry | d89ed13 | 2019-11-19 14:19:40 -0800 | [diff] [blame^] | 45 | #include <android/api-level.h> |
Tom Cherry | de6bd50 | 2018-02-13 16:50:08 -0800 | [diff] [blame] | 46 | |
Jiyong Park | 6866041 | 2019-01-16 23:00:59 +0900 | [diff] [blame] | 47 | #include "mount_namespace.h" |
Tom Cherry | de6bd50 | 2018-02-13 16:50:08 -0800 | [diff] [blame] | 48 | #include "property_service.h" |
Tom Cherry | d89ed13 | 2019-11-19 14:19:40 -0800 | [diff] [blame^] | 49 | #include "selinux.h" |
Tom Cherry | de6bd50 | 2018-02-13 16:50:08 -0800 | [diff] [blame] | 50 | #else |
| 51 | #include "host_init_stubs.h" |
| 52 | #endif |
| 53 | |
James Hawkins | e78ea77 | 2017-03-24 11:43:02 -0700 | [diff] [blame] | 54 | using android::base::boot_clock; |
Tom Cherry | 81f5d3e | 2017-06-22 12:53:17 -0700 | [diff] [blame] | 55 | using android::base::GetProperty; |
| 56 | using android::base::Join; |
Tom Cherry | 60971e6 | 2019-09-10 10:40:47 -0700 | [diff] [blame] | 57 | using android::base::make_scope_guard; |
Tom Cherry | 81f5d3e | 2017-06-22 12:53:17 -0700 | [diff] [blame] | 58 | using android::base::StartsWith; |
Tom Cherry | b734990 | 2015-08-26 11:43:36 -0700 | [diff] [blame] | 59 | using android::base::StringPrintf; |
| 60 | using android::base::WriteStringToFile; |
| 61 | |
Tom Cherry | 81f5d3e | 2017-06-22 12:53:17 -0700 | [diff] [blame] | 62 | namespace android { |
| 63 | namespace init { |
| 64 | |
Tom Cherry | aead51b | 2018-04-20 16:18:12 -0700 | [diff] [blame] | 65 | static Result<std::string> ComputeContextFromExecutable(const std::string& service_path) { |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 66 | std::string computed_context; |
| 67 | |
| 68 | char* raw_con = nullptr; |
| 69 | char* raw_filecon = nullptr; |
| 70 | |
| 71 | if (getcon(&raw_con) == -1) { |
Tom Cherry | 76af7e6 | 2017-08-22 16:13:59 -0700 | [diff] [blame] | 72 | return Error() << "Could not get security context"; |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 73 | } |
| 74 | std::unique_ptr<char> mycon(raw_con); |
| 75 | |
| 76 | if (getfilecon(service_path.c_str(), &raw_filecon) == -1) { |
Tom Cherry | 76af7e6 | 2017-08-22 16:13:59 -0700 | [diff] [blame] | 77 | return Error() << "Could not get file context"; |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 78 | } |
| 79 | std::unique_ptr<char> filecon(raw_filecon); |
| 80 | |
| 81 | char* new_con = nullptr; |
| 82 | int rc = security_compute_create(mycon.get(), filecon.get(), |
| 83 | string_to_security_class("process"), &new_con); |
| 84 | if (rc == 0) { |
| 85 | computed_context = new_con; |
| 86 | free(new_con); |
| 87 | } |
| 88 | if (rc == 0 && computed_context == mycon.get()) { |
Nick Kralevich | 1ea19eb | 2017-08-25 12:08:57 -0700 | [diff] [blame] | 89 | return Error() << "File " << service_path << "(labeled \"" << filecon.get() |
| 90 | << "\") has incorrect label or no domain transition from " << mycon.get() |
| 91 | << " to another SELinux domain defined. Have you configured your " |
| 92 | "service correctly? https://source.android.com/security/selinux/" |
| 93 | "device-policy#label_new_services_and_address_denials"; |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 94 | } |
| 95 | if (rc < 0) { |
Tom Cherry | 76af7e6 | 2017-08-22 16:13:59 -0700 | [diff] [blame] | 96 | return Error() << "Could not get process context"; |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 97 | } |
| 98 | return computed_context; |
| 99 | } |
| 100 | |
Tom Cherry | 8f38048 | 2018-04-17 14:48:44 -0700 | [diff] [blame] | 101 | static bool ExpandArgsAndExecv(const std::vector<std::string>& args, bool sigstop) { |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 102 | std::vector<std::string> expanded_args; |
Tom Cherry | 5e405ca | 2017-09-11 16:08:54 -0700 | [diff] [blame] | 103 | std::vector<char*> c_strings; |
| 104 | |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 105 | expanded_args.resize(args.size()); |
Tom Cherry | 5e405ca | 2017-09-11 16:08:54 -0700 | [diff] [blame] | 106 | c_strings.push_back(const_cast<char*>(args[0].data())); |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 107 | for (std::size_t i = 1; i < args.size(); ++i) { |
Tom Cherry | c5cf85d | 2019-07-31 13:59:15 -0700 | [diff] [blame] | 108 | auto expanded_arg = ExpandProps(args[i]); |
| 109 | if (!expanded_arg) { |
| 110 | LOG(FATAL) << args[0] << ": cannot expand arguments': " << expanded_arg.error(); |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 111 | } |
Tom Cherry | c5cf85d | 2019-07-31 13:59:15 -0700 | [diff] [blame] | 112 | expanded_args[i] = *expanded_arg; |
Tom Cherry | 5e405ca | 2017-09-11 16:08:54 -0700 | [diff] [blame] | 113 | c_strings.push_back(expanded_args[i].data()); |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 114 | } |
Tom Cherry | 5e405ca | 2017-09-11 16:08:54 -0700 | [diff] [blame] | 115 | c_strings.push_back(nullptr); |
| 116 | |
Tom Cherry | 8f38048 | 2018-04-17 14:48:44 -0700 | [diff] [blame] | 117 | if (sigstop) { |
| 118 | kill(getpid(), SIGSTOP); |
| 119 | } |
| 120 | |
Tom Cherry | 5e405ca | 2017-09-11 16:08:54 -0700 | [diff] [blame] | 121 | return execv(c_strings[0], c_strings.data()) == 0; |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 122 | } |
| 123 | |
Martin Stjernholm | cacf043 | 2019-08-21 18:34:31 +0100 | [diff] [blame] | 124 | static bool AreRuntimeApexesReady() { |
Jiyong Park | 6866041 | 2019-01-16 23:00:59 +0900 | [diff] [blame] | 125 | struct stat buf; |
Martin Stjernholm | cacf043 | 2019-08-21 18:34:31 +0100 | [diff] [blame] | 126 | return stat("/apex/com.android.art/", &buf) == 0 && |
| 127 | stat("/apex/com.android.runtime/", &buf) == 0; |
Jiyong Park | 6866041 | 2019-01-16 23:00:59 +0900 | [diff] [blame] | 128 | } |
| 129 | |
Tom Cherry | 5938379 | 2017-07-26 16:09:09 -0700 | [diff] [blame] | 130 | unsigned long Service::next_start_order_ = 1; |
Tom Cherry | 3b81f2d | 2017-07-28 14:48:41 -0700 | [diff] [blame] | 131 | bool Service::is_exec_service_running_ = false; |
Tom Cherry | 5938379 | 2017-07-26 16:09:09 -0700 | [diff] [blame] | 132 | |
Tom Cherry | cb0f9bb | 2017-09-12 15:58:47 -0700 | [diff] [blame] | 133 | Service::Service(const std::string& name, Subcontext* subcontext_for_restart_commands, |
| 134 | const std::vector<std::string>& args) |
Tom Cherry | 1cd082d | 2019-02-06 10:45:56 -0800 | [diff] [blame] | 135 | : Service(name, 0, 0, 0, {}, 0, "", subcontext_for_restart_commands, args) {} |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 136 | |
Wei Wang | 641ff0a | 2017-03-27 10:59:11 -0700 | [diff] [blame] | 137 | Service::Service(const std::string& name, unsigned flags, uid_t uid, gid_t gid, |
Tom Cherry | 247ffbf | 2019-07-08 15:09:36 -0700 | [diff] [blame] | 138 | const std::vector<gid_t>& supp_gids, int namespace_flags, |
Tom Cherry | 1cd082d | 2019-02-06 10:45:56 -0800 | [diff] [blame] | 139 | const std::string& seclabel, Subcontext* subcontext_for_restart_commands, |
| 140 | const std::vector<std::string>& args) |
Wei Wang | 641ff0a | 2017-03-27 10:59:11 -0700 | [diff] [blame] | 141 | : name_(name), |
| 142 | classnames_({"default"}), |
| 143 | flags_(flags), |
| 144 | pid_(0), |
| 145 | crash_count_(0), |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 146 | proc_attr_{.ioprio_class = IoSchedClass_NONE, |
| 147 | .ioprio_pri = 0, |
| 148 | .uid = uid, |
| 149 | .gid = gid, |
| 150 | .supp_gids = supp_gids, |
| 151 | .priority = 0}, |
| 152 | namespaces_{.flags = namespace_flags}, |
Wei Wang | 641ff0a | 2017-03-27 10:59:11 -0700 | [diff] [blame] | 153 | seclabel_(seclabel), |
Tom Cherry | 9cbf570 | 2018-02-13 16:24:51 -0800 | [diff] [blame] | 154 | onrestart_(false, subcontext_for_restart_commands, "<Service '" + name + "' onrestart>", 0, |
| 155 | "onrestart", {}), |
Suren Baghdasaryan | c29c2ba | 2019-10-22 17:18:42 -0700 | [diff] [blame] | 156 | oom_score_adjust_(DEFAULT_OOM_SCORE_ADJUST), |
Tom Cherry | 5938379 | 2017-07-26 16:09:09 -0700 | [diff] [blame] | 157 | start_order_(0), |
Tom Cherry | 9cbf570 | 2018-02-13 16:24:51 -0800 | [diff] [blame] | 158 | args_(args) {} |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 159 | |
| 160 | void Service::NotifyStateChange(const std::string& new_state) const { |
Tom Cherry | b27004a | 2017-03-27 16:27:30 -0700 | [diff] [blame] | 161 | if ((flags_ & SVC_TEMPORARY) != 0) { |
| 162 | // Services created by 'exec' are temporary and don't have properties tracking their state. |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 163 | return; |
| 164 | } |
| 165 | |
Tom Cherry | 1c3a53f | 2017-06-22 16:50:31 -0700 | [diff] [blame] | 166 | std::string prop_name = "init.svc." + name_; |
| 167 | property_set(prop_name, new_state); |
Elliott Hughes | 9605a94 | 2016-11-10 17:43:47 -0800 | [diff] [blame] | 168 | |
| 169 | if (new_state == "running") { |
Elliott Hughes | 9605a94 | 2016-11-10 17:43:47 -0800 | [diff] [blame] | 170 | uint64_t start_ns = time_started_.time_since_epoch().count(); |
Tom Cherry | fed3373 | 2017-08-18 10:47:46 -0700 | [diff] [blame] | 171 | std::string boottime_property = "ro.boottime." + name_; |
| 172 | if (GetProperty(boottime_property, "").empty()) { |
| 173 | property_set(boottime_property, std::to_string(start_ns)); |
| 174 | } |
Elliott Hughes | 9605a94 | 2016-11-10 17:43:47 -0800 | [diff] [blame] | 175 | } |
Daniel Norman | c788771 | 2019-07-19 11:04:01 -0700 | [diff] [blame] | 176 | |
| 177 | // init.svc_debug_pid.* properties are only for tests, and should not be used |
| 178 | // on device for security checks. |
| 179 | std::string pid_property = "init.svc_debug_pid." + name_; |
| 180 | if (new_state == "running") { |
| 181 | property_set(pid_property, std::to_string(pid_)); |
| 182 | } else if (new_state == "stopped") { |
| 183 | property_set(pid_property, ""); |
| 184 | } |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 185 | } |
| 186 | |
Tom Cherry | d89ed13 | 2019-11-19 14:19:40 -0800 | [diff] [blame^] | 187 | void Service::KillProcessGroup(int signal, bool report_oneshot) { |
Tom Cherry | 33838b1 | 2017-05-04 11:32:36 -0700 | [diff] [blame] | 188 | // If we've already seen a successful result from killProcessGroup*(), then we have removed |
| 189 | // the cgroup already and calling these functions a second time will simply result in an error. |
| 190 | // This is true regardless of which signal was sent. |
| 191 | // These functions handle their own logging, so no additional logging is needed. |
| 192 | if (!process_cgroup_empty_) { |
| 193 | LOG(INFO) << "Sending signal " << signal << " to service '" << name_ << "' (pid " << pid_ |
| 194 | << ") process group..."; |
Tom Cherry | d89ed13 | 2019-11-19 14:19:40 -0800 | [diff] [blame^] | 195 | int max_processes = 0; |
Tom Cherry | 33838b1 | 2017-05-04 11:32:36 -0700 | [diff] [blame] | 196 | int r; |
| 197 | if (signal == SIGTERM) { |
Tom Cherry | d89ed13 | 2019-11-19 14:19:40 -0800 | [diff] [blame^] | 198 | r = killProcessGroupOnce(proc_attr_.uid, pid_, signal, &max_processes); |
Tom Cherry | 33838b1 | 2017-05-04 11:32:36 -0700 | [diff] [blame] | 199 | } else { |
Tom Cherry | d89ed13 | 2019-11-19 14:19:40 -0800 | [diff] [blame^] | 200 | r = killProcessGroup(proc_attr_.uid, pid_, signal, &max_processes); |
| 201 | } |
| 202 | |
| 203 | if (report_oneshot && max_processes > 0) { |
| 204 | LOG(WARNING) |
| 205 | << "Killed " << max_processes |
| 206 | << " additional processes from a oneshot process group for service '" << name_ |
| 207 | << "'. This is new behavior, previously child processes would not be killed in " |
| 208 | "this case."; |
Tom Cherry | 33838b1 | 2017-05-04 11:32:36 -0700 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | if (r == 0) process_cgroup_empty_ = true; |
| 212 | } |
Suren Baghdasaryan | c29c2ba | 2019-10-22 17:18:42 -0700 | [diff] [blame] | 213 | |
| 214 | if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) { |
| 215 | LmkdUnregister(name_, pid_); |
| 216 | } |
Elliott Hughes | ad8e94e | 2016-06-15 14:49:57 -0700 | [diff] [blame] | 217 | } |
| 218 | |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 219 | void Service::SetProcessAttributesAndCaps() { |
Jorge Lucangeli Obes | 24b2913 | 2016-10-27 10:33:03 -0400 | [diff] [blame] | 220 | // Keep capabilites on uid change. |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 221 | if (capabilities_ && proc_attr_.uid) { |
Luis Hector Chavez | f596551 | 2017-06-30 14:04:20 -0700 | [diff] [blame] | 222 | // If Android is running in a container, some securebits might already |
| 223 | // be locked, so don't change those. |
Ben Fennema | a724360 | 2017-07-25 14:37:21 -0700 | [diff] [blame] | 224 | unsigned long securebits = prctl(PR_GET_SECUREBITS); |
| 225 | if (securebits == -1UL) { |
Luis Hector Chavez | f596551 | 2017-06-30 14:04:20 -0700 | [diff] [blame] | 226 | PLOG(FATAL) << "prctl(PR_GET_SECUREBITS) failed for " << name_; |
| 227 | } |
| 228 | securebits |= SECBIT_KEEP_CAPS | SECBIT_KEEP_CAPS_LOCKED; |
| 229 | if (prctl(PR_SET_SECUREBITS, securebits) != 0) { |
| 230 | PLOG(FATAL) << "prctl(PR_SET_SECUREBITS) failed for " << name_; |
Jorge Lucangeli Obes | 24b2913 | 2016-10-27 10:33:03 -0400 | [diff] [blame] | 231 | } |
| 232 | } |
| 233 | |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 234 | if (auto result = SetProcessAttributes(proc_attr_); !result) { |
| 235 | LOG(FATAL) << "cannot set attribute for " << name_ << ": " << result.error(); |
| 236 | } |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 237 | |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 238 | if (!seclabel_.empty()) { |
| 239 | if (setexeccon(seclabel_.c_str()) < 0) { |
Elliott Hughes | e18e7e5 | 2016-07-25 18:18:16 -0700 | [diff] [blame] | 240 | PLOG(FATAL) << "cannot setexeccon('" << seclabel_ << "') for " << name_; |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 241 | } |
| 242 | } |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 243 | |
Tom Cherry | 1cd082d | 2019-02-06 10:45:56 -0800 | [diff] [blame] | 244 | if (capabilities_) { |
| 245 | if (!SetCapsForExec(*capabilities_)) { |
Jorge Lucangeli Obes | 24b2913 | 2016-10-27 10:33:03 -0400 | [diff] [blame] | 246 | LOG(FATAL) << "cannot set capabilities for " << name_; |
| 247 | } |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 248 | } else if (proc_attr_.uid) { |
Luis Hector Chavez | 94fb5b0 | 2017-11-16 15:52:00 -0800 | [diff] [blame] | 249 | // Inheritable caps can be non-zero when running in a container. |
| 250 | if (!DropInheritableCaps()) { |
| 251 | LOG(FATAL) << "cannot drop inheritable caps for " << name_; |
| 252 | } |
Jorge Lucangeli Obes | 24b2913 | 2016-10-27 10:33:03 -0400 | [diff] [blame] | 253 | } |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 254 | } |
| 255 | |
Paul Crowley | c73b215 | 2018-04-13 17:38:57 +0000 | [diff] [blame] | 256 | void Service::Reap(const siginfo_t& siginfo) { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 257 | if (!(flags_ & SVC_ONESHOT) || (flags_ & SVC_RESTART)) { |
Tom Cherry | d89ed13 | 2019-11-19 14:19:40 -0800 | [diff] [blame^] | 258 | KillProcessGroup(SIGKILL, false); |
| 259 | } else { |
| 260 | // Legacy behavior from ~2007 until Android R: this else branch did not exist and we did not |
| 261 | // kill the process group in this case. |
| 262 | if (SelinuxGetVendorAndroidVersion() >= __ANDROID_API_R__) { |
| 263 | // The new behavior in Android R is to kill these process groups in all cases. The |
| 264 | // 'true' parameter instructions KillProcessGroup() to report a warning message where it |
| 265 | // detects a difference in behavior has occurred. |
| 266 | KillProcessGroup(SIGKILL, true); |
| 267 | } |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 268 | } |
| 269 | |
Tom Cherry | 2e4c85f | 2019-07-09 13:33:36 -0700 | [diff] [blame] | 270 | // Remove any socket resources we may have created. |
| 271 | for (const auto& socket : sockets_) { |
| 272 | auto path = ANDROID_SOCKET_DIR "/" + socket.name; |
| 273 | unlink(path.c_str()); |
| 274 | } |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 275 | |
Paul Crowley | c73b215 | 2018-04-13 17:38:57 +0000 | [diff] [blame] | 276 | for (const auto& f : reap_callbacks_) { |
| 277 | f(siginfo); |
| 278 | } |
| 279 | |
Tom Cherry | 60971e6 | 2019-09-10 10:40:47 -0700 | [diff] [blame] | 280 | if ((siginfo.si_code != CLD_EXITED || siginfo.si_status != 0) && on_failure_reboot_target_) { |
| 281 | LOG(ERROR) << "Service with 'reboot_on_failure' option failed, shutting down system."; |
Tom Cherry | 18278d2 | 2019-11-12 16:21:20 -0800 | [diff] [blame] | 282 | trigger_shutdown(*on_failure_reboot_target_); |
Tom Cherry | 60971e6 | 2019-09-10 10:40:47 -0700 | [diff] [blame] | 283 | } |
| 284 | |
Tom Cherry | 3b81f2d | 2017-07-28 14:48:41 -0700 | [diff] [blame] | 285 | if (flags_ & SVC_EXEC) UnSetExec(); |
| 286 | |
| 287 | if (flags_ & SVC_TEMPORARY) return; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 288 | |
| 289 | pid_ = 0; |
| 290 | flags_ &= (~SVC_RUNNING); |
Tom Cherry | 5938379 | 2017-07-26 16:09:09 -0700 | [diff] [blame] | 291 | start_order_ = 0; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 292 | |
| 293 | // Oneshot processes go into the disabled state on exit, |
| 294 | // except when manually restarted. |
Martijn Coenen | 70788f9 | 2019-04-23 16:26:01 +0200 | [diff] [blame] | 295 | if ((flags_ & SVC_ONESHOT) && !(flags_ & SVC_RESTART) && !(flags_ & SVC_RESET)) { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 296 | flags_ |= SVC_DISABLED; |
| 297 | } |
| 298 | |
| 299 | // Disabled and reset processes do not get restarted automatically. |
| 300 | if (flags_ & (SVC_DISABLED | SVC_RESET)) { |
| 301 | NotifyStateChange("stopped"); |
Tom Cherry | b27004a | 2017-03-27 16:27:30 -0700 | [diff] [blame] | 302 | return; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 303 | } |
| 304 | |
Jiyong Park | d7f7c20 | 2019-05-10 21:12:15 +0900 | [diff] [blame] | 305 | #if defined(__ANDROID__) |
| 306 | static bool is_apex_updatable = android::sysprop::ApexProperties::updatable().value_or(false); |
| 307 | #else |
| 308 | static bool is_apex_updatable = false; |
| 309 | #endif |
| 310 | const bool is_process_updatable = !pre_apexd_ && is_apex_updatable; |
| 311 | |
Zimuzo | 88de80f | 2019-04-27 21:10:35 +0100 | [diff] [blame] | 312 | // If we crash > 4 times in 4 minutes or before boot_completed, |
| 313 | // reboot into bootloader or set crashing property |
Elliott Hughes | 9605a94 | 2016-11-10 17:43:47 -0800 | [diff] [blame] | 314 | boot_clock::time_point now = boot_clock::now(); |
Jiyong Park | d7f7c20 | 2019-05-10 21:12:15 +0900 | [diff] [blame] | 315 | if (((flags_ & SVC_CRITICAL) || is_process_updatable) && !(flags_ & SVC_RESTART)) { |
Zimuzo | 88de80f | 2019-04-27 21:10:35 +0100 | [diff] [blame] | 316 | bool boot_completed = android::base::GetBoolProperty("sys.boot_completed", false); |
| 317 | if (now < time_crashed_ + 4min || !boot_completed) { |
Elliott Hughes | 9605a94 | 2016-11-10 17:43:47 -0800 | [diff] [blame] | 318 | if (++crash_count_ > 4) { |
Zimuzo | c55a8c6 | 2019-01-07 10:19:02 +0000 | [diff] [blame] | 319 | if (flags_ & SVC_CRITICAL) { |
| 320 | // Aborts into bootloader |
Zimuzo | 88de80f | 2019-04-27 21:10:35 +0100 | [diff] [blame] | 321 | LOG(FATAL) << "critical process '" << name_ << "' exited 4 times " |
| 322 | << (boot_completed ? "in 4 minutes" : "before boot completed"); |
Zimuzo | c55a8c6 | 2019-01-07 10:19:02 +0000 | [diff] [blame] | 323 | } else { |
Zimuzo | 88de80f | 2019-04-27 21:10:35 +0100 | [diff] [blame] | 324 | LOG(ERROR) << "updatable process '" << name_ << "' exited 4 times " |
| 325 | << (boot_completed ? "in 4 minutes" : "before boot completed"); |
Zimuzo | c55a8c6 | 2019-01-07 10:19:02 +0000 | [diff] [blame] | 326 | // Notifies update_verifier and apexd |
Nikita Ioffe | 72d2491 | 2019-10-04 16:45:56 +0100 | [diff] [blame] | 327 | property_set("sys.init.updatable_crashing", "1"); |
Zimuzo | c55a8c6 | 2019-01-07 10:19:02 +0000 | [diff] [blame] | 328 | } |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 329 | } |
| 330 | } else { |
| 331 | time_crashed_ = now; |
Elliott Hughes | 9605a94 | 2016-11-10 17:43:47 -0800 | [diff] [blame] | 332 | crash_count_ = 1; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 333 | } |
| 334 | } |
| 335 | |
| 336 | flags_ &= (~SVC_RESTART); |
| 337 | flags_ |= SVC_RESTARTING; |
| 338 | |
| 339 | // Execute all onrestart commands for this service. |
| 340 | onrestart_.ExecuteAllCommands(); |
| 341 | |
| 342 | NotifyStateChange("restarting"); |
Tom Cherry | b27004a | 2017-03-27 16:27:30 -0700 | [diff] [blame] | 343 | return; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | void Service::DumpState() const { |
Elliott Hughes | f86b5a6 | 2016-06-24 15:12:21 -0700 | [diff] [blame] | 347 | LOG(INFO) << "service " << name_; |
Tom Cherry | 81f5d3e | 2017-06-22 12:53:17 -0700 | [diff] [blame] | 348 | LOG(INFO) << " class '" << Join(classnames_, " ") << "'"; |
| 349 | LOG(INFO) << " exec " << Join(args_, " "); |
Tom Cherry | 2e4c85f | 2019-07-09 13:33:36 -0700 | [diff] [blame] | 350 | for (const auto& socket : sockets_) { |
| 351 | LOG(INFO) << " socket " << socket.name; |
| 352 | } |
| 353 | for (const auto& file : files_) { |
| 354 | LOG(INFO) << " file " << file.name; |
| 355 | } |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 356 | } |
| 357 | |
Tom Cherry | b734990 | 2015-08-26 11:43:36 -0700 | [diff] [blame] | 358 | |
Tom Cherry | bbcbc2f | 2019-06-10 11:08:01 -0700 | [diff] [blame] | 359 | Result<void> Service::ExecStart() { |
Tom Cherry | 60971e6 | 2019-09-10 10:40:47 -0700 | [diff] [blame] | 360 | auto reboot_on_failure = make_scope_guard([this] { |
| 361 | if (on_failure_reboot_target_) { |
Tom Cherry | 18278d2 | 2019-11-12 16:21:20 -0800 | [diff] [blame] | 362 | trigger_shutdown(*on_failure_reboot_target_); |
Tom Cherry | 60971e6 | 2019-09-10 10:40:47 -0700 | [diff] [blame] | 363 | } |
| 364 | }); |
| 365 | |
Jiyong Park | 80aa447 | 2018-11-12 12:08:41 +0900 | [diff] [blame] | 366 | if (is_updatable() && !ServiceList::GetInstance().IsServicesUpdated()) { |
| 367 | // Don't delay the service for ExecStart() as the semantic is that |
| 368 | // the caller might depend on the side effect of the execution. |
| 369 | return Error() << "Cannot start an updatable service '" << name_ |
| 370 | << "' before configs from APEXes are all loaded"; |
| 371 | } |
| 372 | |
Tom Cherry | 3b81f2d | 2017-07-28 14:48:41 -0700 | [diff] [blame] | 373 | flags_ |= SVC_ONESHOT; |
Tom Cherry | b27004a | 2017-03-27 16:27:30 -0700 | [diff] [blame] | 374 | |
Tom Cherry | 76af7e6 | 2017-08-22 16:13:59 -0700 | [diff] [blame] | 375 | if (auto result = Start(); !result) { |
| 376 | return result; |
Tom Cherry | b27004a | 2017-03-27 16:27:30 -0700 | [diff] [blame] | 377 | } |
Tom Cherry | 3b81f2d | 2017-07-28 14:48:41 -0700 | [diff] [blame] | 378 | |
| 379 | flags_ |= SVC_EXEC; |
| 380 | is_exec_service_running_ = true; |
| 381 | |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 382 | LOG(INFO) << "SVC_EXEC service '" << name_ << "' pid " << pid_ << " (uid " << proc_attr_.uid |
| 383 | << " gid " << proc_attr_.gid << "+" << proc_attr_.supp_gids.size() << " context " |
Wei Wang | 2c4ee75 | 2018-06-20 14:54:52 -0700 | [diff] [blame] | 384 | << (!seclabel_.empty() ? seclabel_ : "default") << ") started; waiting..."; |
Tom Cherry | 3b81f2d | 2017-07-28 14:48:41 -0700 | [diff] [blame] | 385 | |
Tom Cherry | 60971e6 | 2019-09-10 10:40:47 -0700 | [diff] [blame] | 386 | reboot_on_failure.Disable(); |
Tom Cherry | bbcbc2f | 2019-06-10 11:08:01 -0700 | [diff] [blame] | 387 | return {}; |
Tom Cherry | b27004a | 2017-03-27 16:27:30 -0700 | [diff] [blame] | 388 | } |
| 389 | |
Tom Cherry | bbcbc2f | 2019-06-10 11:08:01 -0700 | [diff] [blame] | 390 | Result<void> Service::Start() { |
Tom Cherry | 60971e6 | 2019-09-10 10:40:47 -0700 | [diff] [blame] | 391 | auto reboot_on_failure = make_scope_guard([this] { |
| 392 | if (on_failure_reboot_target_) { |
Tom Cherry | 18278d2 | 2019-11-12 16:21:20 -0800 | [diff] [blame] | 393 | trigger_shutdown(*on_failure_reboot_target_); |
Tom Cherry | 60971e6 | 2019-09-10 10:40:47 -0700 | [diff] [blame] | 394 | } |
| 395 | }); |
| 396 | |
Jiyong Park | 80aa447 | 2018-11-12 12:08:41 +0900 | [diff] [blame] | 397 | if (is_updatable() && !ServiceList::GetInstance().IsServicesUpdated()) { |
| 398 | ServiceList::GetInstance().DelayService(*this); |
| 399 | return Error() << "Cannot start an updatable service '" << name_ |
| 400 | << "' before configs from APEXes are all loaded. " |
| 401 | << "Queued for execution."; |
| 402 | } |
| 403 | |
Tao Wu | 990d43c | 2017-10-26 10:43:10 -0700 | [diff] [blame] | 404 | bool disabled = (flags_ & (SVC_DISABLED | SVC_RESET)); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 405 | // Starting a service removes it from the disabled or reset state and |
| 406 | // immediately takes it out of the restarting state if it was in there. |
| 407 | flags_ &= (~(SVC_DISABLED|SVC_RESTARTING|SVC_RESET|SVC_RESTART|SVC_DISABLED_START)); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 408 | |
| 409 | // Running processes require no additional work --- if they're in the |
| 410 | // process of exiting, we've ensured that they will immediately restart |
Tao Wu | 990d43c | 2017-10-26 10:43:10 -0700 | [diff] [blame] | 411 | // on exit, unless they are ONESHOT. For ONESHOT service, if it's in |
| 412 | // stopping status, we just set SVC_RESTART flag so it will get restarted |
| 413 | // in Reap(). |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 414 | if (flags_ & SVC_RUNNING) { |
Tao Wu | 990d43c | 2017-10-26 10:43:10 -0700 | [diff] [blame] | 415 | if ((flags_ & SVC_ONESHOT) && disabled) { |
| 416 | flags_ |= SVC_RESTART; |
| 417 | } |
Tom Cherry | 76af7e6 | 2017-08-22 16:13:59 -0700 | [diff] [blame] | 418 | // It is not an error to try to start a service that is already running. |
Tom Cherry | 60971e6 | 2019-09-10 10:40:47 -0700 | [diff] [blame] | 419 | reboot_on_failure.Disable(); |
Tom Cherry | bbcbc2f | 2019-06-10 11:08:01 -0700 | [diff] [blame] | 420 | return {}; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 421 | } |
| 422 | |
| 423 | bool needs_console = (flags_ & SVC_CONSOLE); |
Viorel Suman | 70daa67 | 2016-03-21 10:08:07 +0200 | [diff] [blame] | 424 | if (needs_console) { |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 425 | if (proc_attr_.console.empty()) { |
Tom Cherry | ff88e30 | 2019-06-26 14:20:53 -0700 | [diff] [blame] | 426 | proc_attr_.console = "/dev/" + GetProperty("ro.boot.console", "console"); |
Viorel Suman | 70daa67 | 2016-03-21 10:08:07 +0200 | [diff] [blame] | 427 | } |
| 428 | |
Adrian Salido | 24ef860 | 2016-12-20 15:52:15 -0800 | [diff] [blame] | 429 | // Make sure that open call succeeds to ensure a console driver is |
| 430 | // properly registered for the device node |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 431 | int console_fd = open(proc_attr_.console.c_str(), O_RDWR | O_CLOEXEC); |
Adrian Salido | 24ef860 | 2016-12-20 15:52:15 -0800 | [diff] [blame] | 432 | if (console_fd < 0) { |
Viorel Suman | 70daa67 | 2016-03-21 10:08:07 +0200 | [diff] [blame] | 433 | flags_ |= SVC_DISABLED; |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 434 | return ErrnoError() << "Couldn't open console '" << proc_attr_.console << "'"; |
Viorel Suman | 70daa67 | 2016-03-21 10:08:07 +0200 | [diff] [blame] | 435 | } |
Adrian Salido | 24ef860 | 2016-12-20 15:52:15 -0800 | [diff] [blame] | 436 | close(console_fd); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | struct stat sb; |
| 440 | if (stat(args_[0].c_str(), &sb) == -1) { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 441 | flags_ |= SVC_DISABLED; |
Tom Cherry | 76af7e6 | 2017-08-22 16:13:59 -0700 | [diff] [blame] | 442 | return ErrnoError() << "Cannot find '" << args_[0] << "'"; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 443 | } |
| 444 | |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 445 | std::string scon; |
| 446 | if (!seclabel_.empty()) { |
| 447 | scon = seclabel_; |
| 448 | } else { |
Tom Cherry | aead51b | 2018-04-20 16:18:12 -0700 | [diff] [blame] | 449 | auto result = ComputeContextFromExecutable(args_[0]); |
Tom Cherry | 76af7e6 | 2017-08-22 16:13:59 -0700 | [diff] [blame] | 450 | if (!result) { |
| 451 | return result.error(); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 452 | } |
Tom Cherry | 76af7e6 | 2017-08-22 16:13:59 -0700 | [diff] [blame] | 453 | scon = *result; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 454 | } |
| 455 | |
Martin Stjernholm | cacf043 | 2019-08-21 18:34:31 +0100 | [diff] [blame] | 456 | if (!AreRuntimeApexesReady() && !pre_apexd_) { |
| 457 | // If this service is started before the Runtime and ART APEXes get |
| 458 | // available, mark it as pre-apexd one. Note that this marking is |
| 459 | // permanent. So for example, if the service is re-launched (e.g., due |
| 460 | // to crash), it is still recognized as pre-apexd... for consistency. |
Jiyong Park | 6866041 | 2019-01-16 23:00:59 +0900 | [diff] [blame] | 461 | pre_apexd_ = true; |
| 462 | } |
| 463 | |
Martijn Coenen | 70788f9 | 2019-04-23 16:26:01 +0200 | [diff] [blame] | 464 | post_data_ = ServiceList::GetInstance().IsPostData(); |
| 465 | |
Wei Wang | a285dac | 2016-10-04 14:05:39 -0700 | [diff] [blame] | 466 | LOG(INFO) << "starting service '" << name_ << "'..."; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 467 | |
Tom Cherry | 5241d10 | 2019-09-10 14:20:35 -0700 | [diff] [blame] | 468 | std::vector<Descriptor> descriptors; |
| 469 | for (const auto& socket : sockets_) { |
| 470 | if (auto result = socket.Create(scon)) { |
| 471 | descriptors.emplace_back(std::move(*result)); |
| 472 | } else { |
| 473 | LOG(INFO) << "Could not create socket '" << socket.name << "': " << result.error(); |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | for (const auto& file : files_) { |
| 478 | if (auto result = file.Create()) { |
| 479 | descriptors.emplace_back(std::move(*result)); |
| 480 | } else { |
| 481 | LOG(INFO) << "Could not open file '" << file.name << "': " << result.error(); |
| 482 | } |
| 483 | } |
| 484 | |
Jorge Lucangeli Obes | 1b3fa3d | 2016-04-21 15:35:09 -0700 | [diff] [blame] | 485 | pid_t pid = -1; |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 486 | if (namespaces_.flags) { |
| 487 | pid = clone(nullptr, nullptr, namespaces_.flags | SIGCHLD, nullptr); |
Jorge Lucangeli Obes | 1b3fa3d | 2016-04-21 15:35:09 -0700 | [diff] [blame] | 488 | } else { |
| 489 | pid = fork(); |
| 490 | } |
| 491 | |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 492 | if (pid == 0) { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 493 | umask(077); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 494 | |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 495 | if (auto result = EnterNamespaces(namespaces_, name_, pre_apexd_); !result) { |
| 496 | LOG(FATAL) << "Service '" << name_ |
| 497 | << "' failed to set up namespaces: " << result.error(); |
Jorge Lucangeli Obes | 1b3fa3d | 2016-04-21 15:35:09 -0700 | [diff] [blame] | 498 | } |
| 499 | |
Tom Cherry | 6de21f1 | 2017-08-22 15:41:03 -0700 | [diff] [blame] | 500 | for (const auto& [key, value] : environment_vars_) { |
| 501 | setenv(key.c_str(), value.c_str(), 1); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 502 | } |
| 503 | |
Tom Cherry | 5241d10 | 2019-09-10 14:20:35 -0700 | [diff] [blame] | 504 | for (const auto& descriptor : descriptors) { |
| 505 | descriptor.Publish(); |
Tom Cherry | 2e4c85f | 2019-07-09 13:33:36 -0700 | [diff] [blame] | 506 | } |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 507 | |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 508 | if (auto result = WritePidToFiles(&writepid_files_); !result) { |
| 509 | LOG(ERROR) << "failed to write pid to files: " << result.error(); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 510 | } |
| 511 | |
Jorge Lucangeli Obes | 344d01f | 2016-07-08 13:32:26 -0400 | [diff] [blame] | 512 | // As requested, set our gid, supplemental gids, uid, context, and |
| 513 | // priority. Aborts on failure. |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 514 | SetProcessAttributesAndCaps(); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 515 | |
Tom Cherry | 8f38048 | 2018-04-17 14:48:44 -0700 | [diff] [blame] | 516 | if (!ExpandArgsAndExecv(args_, sigstop_)) { |
Tom Cherry | 9328021 | 2019-09-26 15:24:40 -0700 | [diff] [blame] | 517 | PLOG(ERROR) << "cannot execv('" << args_[0] |
| 518 | << "'). See the 'Debugging init' section of init's README.md for tips"; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 519 | } |
| 520 | |
| 521 | _exit(127); |
| 522 | } |
| 523 | |
| 524 | if (pid < 0) { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 525 | pid_ = 0; |
Tom Cherry | 76af7e6 | 2017-08-22 16:13:59 -0700 | [diff] [blame] | 526 | return ErrnoError() << "Failed to fork"; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 527 | } |
| 528 | |
Suren Baghdasaryan | c29c2ba | 2019-10-22 17:18:42 -0700 | [diff] [blame] | 529 | if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) { |
Tom Cherry | 1c3a53f | 2017-06-22 16:50:31 -0700 | [diff] [blame] | 530 | std::string oom_str = std::to_string(oom_score_adjust_); |
Marco Nelissen | 310f670 | 2016-07-22 12:07:06 -0700 | [diff] [blame] | 531 | std::string oom_file = StringPrintf("/proc/%d/oom_score_adj", pid); |
| 532 | if (!WriteStringToFile(oom_str, oom_file)) { |
Elliott Hughes | 076305e | 2019-03-08 12:34:53 -0800 | [diff] [blame] | 533 | PLOG(ERROR) << "couldn't write oom_score_adj"; |
Marco Nelissen | 310f670 | 2016-07-22 12:07:06 -0700 | [diff] [blame] | 534 | } |
| 535 | } |
| 536 | |
Elliott Hughes | 9605a94 | 2016-11-10 17:43:47 -0800 | [diff] [blame] | 537 | time_started_ = boot_clock::now(); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 538 | pid_ = pid; |
| 539 | flags_ |= SVC_RUNNING; |
Tom Cherry | 5938379 | 2017-07-26 16:09:09 -0700 | [diff] [blame] | 540 | start_order_ = next_start_order_++; |
Tom Cherry | 33838b1 | 2017-05-04 11:32:36 -0700 | [diff] [blame] | 541 | process_cgroup_empty_ = false; |
Elliott Hughes | ad8e94e | 2016-06-15 14:49:57 -0700 | [diff] [blame] | 542 | |
Peter Collingbourne | d7157c2 | 2018-10-30 15:49:33 -0700 | [diff] [blame] | 543 | bool use_memcg = swappiness_ != -1 || soft_limit_in_bytes_ != -1 || limit_in_bytes_ != -1 || |
| 544 | limit_percent_ != -1 || !limit_property_.empty(); |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 545 | errno = -createProcessGroup(proc_attr_.uid, pid_, use_memcg); |
Elliott Hughes | ad8e94e | 2016-06-15 14:49:57 -0700 | [diff] [blame] | 546 | if (errno != 0) { |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 547 | PLOG(ERROR) << "createProcessGroup(" << proc_attr_.uid << ", " << pid_ |
| 548 | << ") failed for service '" << name_ << "'"; |
Peter Collingbourne | d7157c2 | 2018-10-30 15:49:33 -0700 | [diff] [blame] | 549 | } else if (use_memcg) { |
Robert Benea | d485226 | 2017-07-16 19:38:11 -0700 | [diff] [blame] | 550 | if (swappiness_ != -1) { |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 551 | if (!setProcessGroupSwappiness(proc_attr_.uid, pid_, swappiness_)) { |
Robert Benea | d485226 | 2017-07-16 19:38:11 -0700 | [diff] [blame] | 552 | PLOG(ERROR) << "setProcessGroupSwappiness failed"; |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | if (soft_limit_in_bytes_ != -1) { |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 557 | if (!setProcessGroupSoftLimit(proc_attr_.uid, pid_, soft_limit_in_bytes_)) { |
Robert Benea | d485226 | 2017-07-16 19:38:11 -0700 | [diff] [blame] | 558 | PLOG(ERROR) << "setProcessGroupSoftLimit failed"; |
| 559 | } |
| 560 | } |
| 561 | |
Peter Collingbourne | d7157c2 | 2018-10-30 15:49:33 -0700 | [diff] [blame] | 562 | size_t computed_limit_in_bytes = limit_in_bytes_; |
| 563 | if (limit_percent_ != -1) { |
| 564 | long page_size = sysconf(_SC_PAGESIZE); |
| 565 | long num_pages = sysconf(_SC_PHYS_PAGES); |
| 566 | if (page_size > 0 && num_pages > 0) { |
| 567 | size_t max_mem = SIZE_MAX; |
| 568 | if (size_t(num_pages) < SIZE_MAX / size_t(page_size)) { |
| 569 | max_mem = size_t(num_pages) * size_t(page_size); |
| 570 | } |
| 571 | computed_limit_in_bytes = |
| 572 | std::min(computed_limit_in_bytes, max_mem / 100 * limit_percent_); |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | if (!limit_property_.empty()) { |
| 577 | // This ends up overwriting computed_limit_in_bytes but only if the |
| 578 | // property is defined. |
| 579 | computed_limit_in_bytes = android::base::GetUintProperty( |
| 580 | limit_property_, computed_limit_in_bytes, SIZE_MAX); |
| 581 | } |
| 582 | |
| 583 | if (computed_limit_in_bytes != size_t(-1)) { |
Vic Yang | e01ca4d | 2019-05-29 15:58:32 -0700 | [diff] [blame] | 584 | if (!setProcessGroupLimit(proc_attr_.uid, pid_, computed_limit_in_bytes)) { |
Robert Benea | d485226 | 2017-07-16 19:38:11 -0700 | [diff] [blame] | 585 | PLOG(ERROR) << "setProcessGroupLimit failed"; |
| 586 | } |
| 587 | } |
Elliott Hughes | ad8e94e | 2016-06-15 14:49:57 -0700 | [diff] [blame] | 588 | } |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 589 | |
Suren Baghdasaryan | c29c2ba | 2019-10-22 17:18:42 -0700 | [diff] [blame] | 590 | if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) { |
| 591 | LmkdRegister(name_, proc_attr_.uid, pid_, oom_score_adjust_); |
| 592 | } |
| 593 | |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 594 | NotifyStateChange("running"); |
Tom Cherry | 60971e6 | 2019-09-10 10:40:47 -0700 | [diff] [blame] | 595 | reboot_on_failure.Disable(); |
Tom Cherry | bbcbc2f | 2019-06-10 11:08:01 -0700 | [diff] [blame] | 596 | return {}; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 597 | } |
| 598 | |
Tom Cherry | bbcbc2f | 2019-06-10 11:08:01 -0700 | [diff] [blame] | 599 | Result<void> Service::StartIfNotDisabled() { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 600 | if (!(flags_ & SVC_DISABLED)) { |
| 601 | return Start(); |
| 602 | } else { |
| 603 | flags_ |= SVC_DISABLED_START; |
| 604 | } |
Tom Cherry | bbcbc2f | 2019-06-10 11:08:01 -0700 | [diff] [blame] | 605 | return {}; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 606 | } |
| 607 | |
Tom Cherry | bbcbc2f | 2019-06-10 11:08:01 -0700 | [diff] [blame] | 608 | Result<void> Service::Enable() { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 609 | flags_ &= ~(SVC_DISABLED | SVC_RC_DISABLED); |
| 610 | if (flags_ & SVC_DISABLED_START) { |
| 611 | return Start(); |
| 612 | } |
Tom Cherry | bbcbc2f | 2019-06-10 11:08:01 -0700 | [diff] [blame] | 613 | return {}; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 614 | } |
| 615 | |
| 616 | void Service::Reset() { |
| 617 | StopOrReset(SVC_RESET); |
| 618 | } |
| 619 | |
Martijn Coenen | 70788f9 | 2019-04-23 16:26:01 +0200 | [diff] [blame] | 620 | void Service::ResetIfPostData() { |
| 621 | if (post_data_) { |
Martijn Coenen | acc45aa | 2019-05-15 22:04:13 +0200 | [diff] [blame] | 622 | if (flags_ & SVC_RUNNING) { |
| 623 | running_at_post_data_reset_ = true; |
| 624 | } |
Martijn Coenen | 70788f9 | 2019-04-23 16:26:01 +0200 | [diff] [blame] | 625 | StopOrReset(SVC_RESET); |
| 626 | } |
| 627 | } |
| 628 | |
Tom Cherry | bbcbc2f | 2019-06-10 11:08:01 -0700 | [diff] [blame] | 629 | Result<void> Service::StartIfPostData() { |
Martijn Coenen | acc45aa | 2019-05-15 22:04:13 +0200 | [diff] [blame] | 630 | // Start the service, but only if it was started after /data was mounted, |
| 631 | // and it was still running when we reset the post-data services. |
| 632 | if (running_at_post_data_reset_) { |
| 633 | return Start(); |
| 634 | } |
| 635 | |
Tom Cherry | bbcbc2f | 2019-06-10 11:08:01 -0700 | [diff] [blame] | 636 | return {}; |
Martijn Coenen | acc45aa | 2019-05-15 22:04:13 +0200 | [diff] [blame] | 637 | } |
| 638 | |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 639 | void Service::Stop() { |
| 640 | StopOrReset(SVC_DISABLED); |
| 641 | } |
| 642 | |
Bertrand SIMONNET | b7e03e8 | 2015-12-18 11:39:59 -0800 | [diff] [blame] | 643 | void Service::Terminate() { |
| 644 | flags_ &= ~(SVC_RESTARTING | SVC_DISABLED_START); |
| 645 | flags_ |= SVC_DISABLED; |
| 646 | if (pid_) { |
Elliott Hughes | ad8e94e | 2016-06-15 14:49:57 -0700 | [diff] [blame] | 647 | KillProcessGroup(SIGTERM); |
Bertrand SIMONNET | b7e03e8 | 2015-12-18 11:39:59 -0800 | [diff] [blame] | 648 | NotifyStateChange("stopping"); |
| 649 | } |
| 650 | } |
| 651 | |
Tom Cherry | 73f535e | 2018-09-27 16:10:46 -0700 | [diff] [blame] | 652 | void Service::Timeout() { |
| 653 | // All process state flags will be taken care of in Reap(), we really just want to kill the |
| 654 | // process here when it times out. Oneshot processes will transition to be disabled, and |
| 655 | // all other processes will transition to be restarting. |
| 656 | LOG(INFO) << "Service '" << name_ << "' expired its timeout of " << timeout_period_->count() |
| 657 | << " seconds and will now be killed"; |
| 658 | if (pid_) { |
| 659 | KillProcessGroup(SIGKILL); |
| 660 | NotifyStateChange("stopping"); |
| 661 | } |
| 662 | } |
| 663 | |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 664 | void Service::Restart() { |
| 665 | if (flags_ & SVC_RUNNING) { |
| 666 | /* Stop, wait, then start the service. */ |
| 667 | StopOrReset(SVC_RESTART); |
| 668 | } else if (!(flags_ & SVC_RESTARTING)) { |
| 669 | /* Just start the service since it's not running. */ |
Tom Cherry | 76af7e6 | 2017-08-22 16:13:59 -0700 | [diff] [blame] | 670 | if (auto result = Start(); !result) { |
| 671 | LOG(ERROR) << "Could not restart '" << name_ << "': " << result.error(); |
| 672 | } |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 673 | } /* else: Service is restarting anyways. */ |
| 674 | } |
| 675 | |
Elliott Hughes | ad8e94e | 2016-06-15 14:49:57 -0700 | [diff] [blame] | 676 | // The how field should be either SVC_DISABLED, SVC_RESET, or SVC_RESTART. |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 677 | void Service::StopOrReset(int how) { |
Elliott Hughes | ad8e94e | 2016-06-15 14:49:57 -0700 | [diff] [blame] | 678 | // The service is still SVC_RUNNING until its process exits, but if it has |
| 679 | // already exited it shoudn't attempt a restart yet. |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 680 | flags_ &= ~(SVC_RESTARTING | SVC_DISABLED_START); |
| 681 | |
| 682 | if ((how != SVC_DISABLED) && (how != SVC_RESET) && (how != SVC_RESTART)) { |
Elliott Hughes | ad8e94e | 2016-06-15 14:49:57 -0700 | [diff] [blame] | 683 | // An illegal flag: default to SVC_DISABLED. |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 684 | how = SVC_DISABLED; |
| 685 | } |
Elliott Hughes | ad8e94e | 2016-06-15 14:49:57 -0700 | [diff] [blame] | 686 | |
| 687 | // If the service has not yet started, prevent it from auto-starting with its class. |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 688 | if (how == SVC_RESET) { |
| 689 | flags_ |= (flags_ & SVC_RC_DISABLED) ? SVC_DISABLED : SVC_RESET; |
| 690 | } else { |
| 691 | flags_ |= how; |
| 692 | } |
Tao Wu | 84b856d | 2017-10-27 11:29:13 -0700 | [diff] [blame] | 693 | // Make sure it's in right status when a restart immediately follow a |
| 694 | // stop/reset or vice versa. |
| 695 | if (how == SVC_RESTART) { |
| 696 | flags_ &= (~(SVC_DISABLED | SVC_RESET)); |
| 697 | } else { |
| 698 | flags_ &= (~SVC_RESTART); |
| 699 | } |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 700 | |
| 701 | if (pid_) { |
Elliott Hughes | ad8e94e | 2016-06-15 14:49:57 -0700 | [diff] [blame] | 702 | KillProcessGroup(SIGKILL); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 703 | NotifyStateChange("stopping"); |
| 704 | } else { |
| 705 | NotifyStateChange("stopped"); |
| 706 | } |
| 707 | } |
| 708 | |
Tom Cherry | 4772f1d | 2019-07-30 09:34:41 -0700 | [diff] [blame] | 709 | Result<std::unique_ptr<Service>> Service::MakeTemporaryOneshotService( |
| 710 | const std::vector<std::string>& args) { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 711 | // Parse the arguments: exec [SECLABEL [UID [GID]*] --] COMMAND ARGS... |
| 712 | // SECLABEL can be a - to denote default |
| 713 | std::size_t command_arg = 1; |
| 714 | for (std::size_t i = 1; i < args.size(); ++i) { |
| 715 | if (args[i] == "--") { |
| 716 | command_arg = i + 1; |
| 717 | break; |
| 718 | } |
| 719 | } |
| 720 | if (command_arg > 4 + NR_SVC_SUPP_GIDS) { |
Tom Cherry | 4772f1d | 2019-07-30 09:34:41 -0700 | [diff] [blame] | 721 | return Error() << "exec called with too many supplementary group ids"; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 722 | } |
| 723 | |
| 724 | if (command_arg >= args.size()) { |
Tom Cherry | 4772f1d | 2019-07-30 09:34:41 -0700 | [diff] [blame] | 725 | return Error() << "exec called without command"; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 726 | } |
| 727 | std::vector<std::string> str_args(args.begin() + command_arg, args.end()); |
| 728 | |
Tom Cherry | 3b81f2d | 2017-07-28 14:48:41 -0700 | [diff] [blame] | 729 | static size_t exec_count = 0; |
| 730 | exec_count++; |
| 731 | std::string name = "exec " + std::to_string(exec_count) + " (" + Join(str_args, " ") + ")"; |
Tom Cherry | 86e31a8 | 2017-04-25 17:31:06 -0700 | [diff] [blame] | 732 | |
Tom Cherry | 3b81f2d | 2017-07-28 14:48:41 -0700 | [diff] [blame] | 733 | unsigned flags = SVC_ONESHOT | SVC_TEMPORARY; |
Jorge Lucangeli Obes | 1b3fa3d | 2016-04-21 15:35:09 -0700 | [diff] [blame] | 734 | unsigned namespace_flags = 0; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 735 | |
| 736 | std::string seclabel = ""; |
| 737 | if (command_arg > 2 && args[1] != "-") { |
| 738 | seclabel = args[1]; |
| 739 | } |
Tom Cherry | 11a3aee | 2017-08-03 12:54:07 -0700 | [diff] [blame] | 740 | Result<uid_t> uid = 0; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 741 | if (command_arg > 3) { |
Tom Cherry | 11a3aee | 2017-08-03 12:54:07 -0700 | [diff] [blame] | 742 | uid = DecodeUid(args[2]); |
| 743 | if (!uid) { |
Tom Cherry | 4772f1d | 2019-07-30 09:34:41 -0700 | [diff] [blame] | 744 | return Error() << "Unable to decode UID for '" << args[2] << "': " << uid.error(); |
Tom Cherry | 517e1f1 | 2017-05-04 17:40:33 -0700 | [diff] [blame] | 745 | } |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 746 | } |
Tom Cherry | 11a3aee | 2017-08-03 12:54:07 -0700 | [diff] [blame] | 747 | Result<gid_t> gid = 0; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 748 | std::vector<gid_t> supp_gids; |
| 749 | if (command_arg > 4) { |
Tom Cherry | 11a3aee | 2017-08-03 12:54:07 -0700 | [diff] [blame] | 750 | gid = DecodeUid(args[3]); |
| 751 | if (!gid) { |
Tom Cherry | 4772f1d | 2019-07-30 09:34:41 -0700 | [diff] [blame] | 752 | return Error() << "Unable to decode GID for '" << args[3] << "': " << gid.error(); |
Tom Cherry | 517e1f1 | 2017-05-04 17:40:33 -0700 | [diff] [blame] | 753 | } |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 754 | std::size_t nr_supp_gids = command_arg - 1 /* -- */ - 4 /* exec SECLABEL UID GID */; |
| 755 | for (size_t i = 0; i < nr_supp_gids; ++i) { |
Tom Cherry | 11a3aee | 2017-08-03 12:54:07 -0700 | [diff] [blame] | 756 | auto supp_gid = DecodeUid(args[4 + i]); |
| 757 | if (!supp_gid) { |
Tom Cherry | 4772f1d | 2019-07-30 09:34:41 -0700 | [diff] [blame] | 758 | return Error() << "Unable to decode GID for '" << args[4 + i] |
| 759 | << "': " << supp_gid.error(); |
Tom Cherry | 517e1f1 | 2017-05-04 17:40:33 -0700 | [diff] [blame] | 760 | } |
Tom Cherry | 11a3aee | 2017-08-03 12:54:07 -0700 | [diff] [blame] | 761 | supp_gids.push_back(*supp_gid); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 762 | } |
| 763 | } |
| 764 | |
Tom Cherry | 1cd082d | 2019-02-06 10:45:56 -0800 | [diff] [blame] | 765 | return std::make_unique<Service>(name, flags, *uid, *gid, supp_gids, namespace_flags, seclabel, |
| 766 | nullptr, str_args); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 767 | } |
| 768 | |
Tom Cherry | 81f5d3e | 2017-06-22 12:53:17 -0700 | [diff] [blame] | 769 | } // namespace init |
| 770 | } // namespace android |