The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 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 | |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 17 | #include <ctype.h> |
Rom Lemarchand | 6a52443 | 2015-02-28 06:39:11 -0800 | [diff] [blame] | 18 | #include <dirent.h> |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 19 | #include <errno.h> |
| 20 | #include <fcntl.h> |
dcashman | c819e78 | 2016-03-17 15:01:56 -0700 | [diff] [blame^] | 21 | #include <fstream> |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 22 | #include <libgen.h> |
Elliott Hughes | cc86fb2 | 2015-03-17 20:01:13 -0700 | [diff] [blame] | 23 | #include <paths.h> |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 24 | #include <signal.h> |
| 25 | #include <stdarg.h> |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 26 | #include <stdio.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <string.h> |
Elliott Hughes | 929f407 | 2015-04-24 21:13:44 -0700 | [diff] [blame] | 29 | #include <sys/epoll.h> |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 30 | #include <sys/mount.h> |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 31 | #include <sys/socket.h> |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 32 | #include <sys/stat.h> |
| 33 | #include <sys/types.h> |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 34 | #include <sys/un.h> |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 35 | #include <sys/wait.h> |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 36 | #include <unistd.h> |
| 37 | |
| 38 | #include <mtd/mtd-user.h> |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 39 | |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 40 | #include <selinux/selinux.h> |
| 41 | #include <selinux/label.h> |
Stephen Smalley | ae6f3d7 | 2012-05-01 15:02:53 -0400 | [diff] [blame] | 42 | #include <selinux/android.h> |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 43 | |
Elliott Hughes | 4f71319 | 2015-12-04 22:00:26 -0800 | [diff] [blame] | 44 | #include <android-base/file.h> |
| 45 | #include <android-base/stringprintf.h> |
| 46 | #include <android-base/strings.h> |
Nick Kralevich | 56fa0ac | 2013-06-24 17:41:40 -0700 | [diff] [blame] | 47 | #include <cutils/android_reboot.h> |
Alex Klyubin | 0d872d8 | 2013-08-16 13:19:24 -0700 | [diff] [blame] | 48 | #include <cutils/fs.h> |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 49 | #include <cutils/iosched_policy.h> |
| 50 | #include <cutils/list.h> |
| 51 | #include <cutils/sockets.h> |
Colin Cross | f83d0b9 | 2010-04-21 12:04:20 -0700 | [diff] [blame] | 52 | #include <private/android_filesystem_config.h> |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 53 | |
Rom Lemarchand | 6a52443 | 2015-02-28 06:39:11 -0800 | [diff] [blame] | 54 | #include <memory> |
| 55 | |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 56 | #include "action.h" |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 57 | #include "bootchart.h" |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 58 | #include "devices.h" |
Tom Cherry | b734990 | 2015-08-26 11:43:36 -0700 | [diff] [blame] | 59 | #include "import_parser.h" |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 60 | #include "init.h" |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 61 | #include "init_parser.h" |
| 62 | #include "keychords.h" |
Colin Cross | ed8a7d8 | 2010-04-19 17:05:34 -0700 | [diff] [blame] | 63 | #include "log.h" |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 64 | #include "property_service.h" |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 65 | #include "service.h" |
Colin Cross | 9c5366b | 2010-04-13 19:48:59 -0700 | [diff] [blame] | 66 | #include "signal_handler.h" |
Colin Cross | f83d0b9 | 2010-04-21 12:04:20 -0700 | [diff] [blame] | 67 | #include "ueventd.h" |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 68 | #include "util.h" |
Arve Hjønnevåg | d97d907 | 2012-06-13 21:51:56 -0700 | [diff] [blame] | 69 | #include "watchdogd.h" |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 70 | |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 71 | struct selabel_handle *sehandle; |
rpcraig | 63207cd | 2012-08-09 10:05:49 -0400 | [diff] [blame] | 72 | struct selabel_handle *sehandle_prop; |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 73 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 74 | static int property_triggers_enabled = 0; |
| 75 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 76 | static char qemu[32]; |
| 77 | |
Viorel Suman | 70daa67 | 2016-03-21 10:08:07 +0200 | [diff] [blame] | 78 | std::string default_console = "/dev/console"; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 79 | static time_t process_needs_restart; |
| 80 | |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 81 | const char *ENV[32]; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 82 | |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 83 | bool waiting_for_exec = false; |
| 84 | |
Elliott Hughes | 929f407 | 2015-04-24 21:13:44 -0700 | [diff] [blame] | 85 | static int epoll_fd = -1; |
| 86 | |
| 87 | void register_epoll_handler(int fd, void (*fn)()) { |
| 88 | epoll_event ev; |
| 89 | ev.events = EPOLLIN; |
| 90 | ev.data.ptr = reinterpret_cast<void*>(fn); |
| 91 | if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fd, &ev) == -1) { |
| 92 | ERROR("epoll_ctl failed: %s\n", strerror(errno)); |
| 93 | } |
| 94 | } |
| 95 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 96 | /* add_environment - add "key=value" to the current environment */ |
| 97 | int add_environment(const char *key, const char *val) |
| 98 | { |
James Morrissey | 381341f | 2014-05-16 11:36:36 +0100 | [diff] [blame] | 99 | size_t n; |
| 100 | size_t key_len = strlen(key); |
Vladimir Chtchetkine | 2b99543 | 2011-09-28 09:55:31 -0700 | [diff] [blame] | 101 | |
James Morrissey | 381341f | 2014-05-16 11:36:36 +0100 | [diff] [blame] | 102 | /* The last environment entry is reserved to terminate the list */ |
| 103 | for (n = 0; n < (ARRAY_SIZE(ENV) - 1); n++) { |
| 104 | |
| 105 | /* Delete any existing entry for this key */ |
| 106 | if (ENV[n] != NULL) { |
| 107 | size_t entry_key_len = strcspn(ENV[n], "="); |
| 108 | if ((entry_key_len == key_len) && (strncmp(ENV[n], key, entry_key_len) == 0)) { |
| 109 | free((char*)ENV[n]); |
| 110 | ENV[n] = NULL; |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | /* Add entry if a free slot is available */ |
| 115 | if (ENV[n] == NULL) { |
Elliott Hughes | f3cf438 | 2015-02-03 17:12:07 -0800 | [diff] [blame] | 116 | char* entry; |
| 117 | asprintf(&entry, "%s=%s", key, val); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 118 | ENV[n] = entry; |
| 119 | return 0; |
| 120 | } |
| 121 | } |
| 122 | |
James Morrissey | 381341f | 2014-05-16 11:36:36 +0100 | [diff] [blame] | 123 | ERROR("No env. room to store: '%s':'%s'\n", key, val); |
| 124 | |
| 125 | return -1; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 126 | } |
| 127 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 128 | void property_changed(const char *name, const char *value) |
| 129 | { |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 130 | if (property_triggers_enabled) |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 131 | ActionManager::GetInstance().QueuePropertyTrigger(name, value); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 132 | } |
| 133 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 134 | static void restart_processes() |
| 135 | { |
| 136 | process_needs_restart = 0; |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 137 | ServiceManager::GetInstance(). |
| 138 | ForEachServiceWithFlags(SVC_RESTARTING, [] (Service* s) { |
| 139 | s->RestartIfNeeded(process_needs_restart); |
| 140 | }); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 141 | } |
| 142 | |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 143 | static void msg_start(const std::string& name) |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 144 | { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 145 | Service* svc = nullptr; |
| 146 | std::vector<std::string> vargs; |
San Mehat | f24e252 | 2009-05-19 13:30:46 -0700 | [diff] [blame] | 147 | |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 148 | size_t colon_pos = name.find(':'); |
| 149 | if (colon_pos == std::string::npos) { |
| 150 | svc = ServiceManager::GetInstance().FindServiceByName(name); |
| 151 | } else { |
| 152 | std::string service_name(name.substr(0, colon_pos)); |
| 153 | std::string args(name.substr(colon_pos + 1)); |
| 154 | vargs = android::base::Split(args, " "); |
San Mehat | f24e252 | 2009-05-19 13:30:46 -0700 | [diff] [blame] | 155 | |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 156 | svc = ServiceManager::GetInstance().FindServiceByName(service_name); |
San Mehat | f24e252 | 2009-05-19 13:30:46 -0700 | [diff] [blame] | 157 | } |
Vladimir Chtchetkine | 2b99543 | 2011-09-28 09:55:31 -0700 | [diff] [blame] | 158 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 159 | if (svc) { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 160 | svc->Start(vargs); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 161 | } else { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 162 | ERROR("no such service '%s'\n", name.c_str()); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 163 | } |
| 164 | } |
| 165 | |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 166 | static void msg_stop(const std::string& name) |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 167 | { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 168 | Service* svc = ServiceManager::GetInstance().FindServiceByName(name); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 169 | |
| 170 | if (svc) { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 171 | svc->Stop(); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 172 | } else { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 173 | ERROR("no such service '%s'\n", name.c_str()); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 174 | } |
| 175 | } |
| 176 | |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 177 | static void msg_restart(const std::string& name) |
Mike Kasick | b54f39f | 2012-01-25 23:48:46 -0500 | [diff] [blame] | 178 | { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 179 | Service* svc = ServiceManager::GetInstance().FindServiceByName(name); |
Mike Kasick | b54f39f | 2012-01-25 23:48:46 -0500 | [diff] [blame] | 180 | |
| 181 | if (svc) { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 182 | svc->Restart(); |
Mike Kasick | b54f39f | 2012-01-25 23:48:46 -0500 | [diff] [blame] | 183 | } else { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 184 | ERROR("no such service '%s'\n", name.c_str()); |
Mike Kasick | b54f39f | 2012-01-25 23:48:46 -0500 | [diff] [blame] | 185 | } |
| 186 | } |
| 187 | |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 188 | void handle_control_message(const std::string& msg, const std::string& arg) |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 189 | { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 190 | if (msg == "start") { |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 191 | msg_start(arg); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 192 | } else if (msg == "stop") { |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 193 | msg_stop(arg); |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 194 | } else if (msg == "restart") { |
Mike Kasick | b54f39f | 2012-01-25 23:48:46 -0500 | [diff] [blame] | 195 | msg_restart(arg); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 196 | } else { |
Tom Cherry | bac3299 | 2015-07-31 12:45:25 -0700 | [diff] [blame] | 197 | ERROR("unknown control msg '%s'\n", msg.c_str()); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 198 | } |
| 199 | } |
| 200 | |
Tom Cherry | 96f6731 | 2015-07-30 13:52:55 -0700 | [diff] [blame] | 201 | static int wait_for_coldboot_done_action(const std::vector<std::string>& args) { |
Elliott Hughes | c6c26ed | 2015-04-24 18:50:30 -0700 | [diff] [blame] | 202 | Timer t; |
| 203 | |
| 204 | NOTICE("Waiting for %s...\n", COLDBOOT_DONE); |
Elliott Hughes | c7331d0 | 2015-05-14 12:03:14 -0700 | [diff] [blame] | 205 | // Any longer than 1s is an unreasonable length of time to delay booting. |
| 206 | // If you're hitting this timeout, check that you didn't make your |
| 207 | // sepolicy regular expressions too expensive (http://b/19899875). |
| 208 | if (wait_for_file(COLDBOOT_DONE, 1)) { |
Andreas Gampe | a016c42 | 2014-11-24 19:52:41 -0800 | [diff] [blame] | 209 | ERROR("Timed out waiting for %s\n", COLDBOOT_DONE); |
Elliott Hughes | c6c26ed | 2015-04-24 18:50:30 -0700 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | NOTICE("Waiting for %s took %.2fs.\n", COLDBOOT_DONE, t.duration()); |
| 213 | return 0; |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 214 | } |
| 215 | |
Alex Klyubin | 0d872d8 | 2013-08-16 13:19:24 -0700 | [diff] [blame] | 216 | /* |
| 217 | * Writes 512 bytes of output from Hardware RNG (/dev/hw_random, backed |
| 218 | * by Linux kernel's hw_random framework) into Linux RNG's via /dev/urandom. |
| 219 | * Does nothing if Hardware RNG is not present. |
| 220 | * |
| 221 | * Since we don't yet trust the quality of Hardware RNG, these bytes are not |
| 222 | * mixed into the primary pool of Linux RNG and the entropy estimate is left |
| 223 | * unmodified. |
| 224 | * |
| 225 | * If the HW RNG device /dev/hw_random is present, we require that at least |
| 226 | * 512 bytes read from it are written into Linux RNG. QA is expected to catch |
| 227 | * devices/configurations where these I/O operations are blocking for a long |
| 228 | * time. We do not reboot or halt on failures, as this is a best-effort |
| 229 | * attempt. |
| 230 | */ |
Tom Cherry | 96f6731 | 2015-07-30 13:52:55 -0700 | [diff] [blame] | 231 | static int mix_hwrng_into_linux_rng_action(const std::vector<std::string>& args) |
Alex Klyubin | 0d872d8 | 2013-08-16 13:19:24 -0700 | [diff] [blame] | 232 | { |
| 233 | int result = -1; |
| 234 | int hwrandom_fd = -1; |
| 235 | int urandom_fd = -1; |
| 236 | char buf[512]; |
| 237 | ssize_t chunk_size; |
| 238 | size_t total_bytes_written = 0; |
| 239 | |
| 240 | hwrandom_fd = TEMP_FAILURE_RETRY( |
Nick Kralevich | 45a884f | 2015-02-02 14:37:22 -0800 | [diff] [blame] | 241 | open("/dev/hw_random", O_RDONLY | O_NOFOLLOW | O_CLOEXEC)); |
Alex Klyubin | 0d872d8 | 2013-08-16 13:19:24 -0700 | [diff] [blame] | 242 | if (hwrandom_fd == -1) { |
| 243 | if (errno == ENOENT) { |
| 244 | ERROR("/dev/hw_random not found\n"); |
| 245 | /* It's not an error to not have a Hardware RNG. */ |
| 246 | result = 0; |
| 247 | } else { |
| 248 | ERROR("Failed to open /dev/hw_random: %s\n", strerror(errno)); |
| 249 | } |
| 250 | goto ret; |
| 251 | } |
| 252 | |
| 253 | urandom_fd = TEMP_FAILURE_RETRY( |
Nick Kralevich | 45a884f | 2015-02-02 14:37:22 -0800 | [diff] [blame] | 254 | open("/dev/urandom", O_WRONLY | O_NOFOLLOW | O_CLOEXEC)); |
Alex Klyubin | 0d872d8 | 2013-08-16 13:19:24 -0700 | [diff] [blame] | 255 | if (urandom_fd == -1) { |
| 256 | ERROR("Failed to open /dev/urandom: %s\n", strerror(errno)); |
| 257 | goto ret; |
| 258 | } |
| 259 | |
| 260 | while (total_bytes_written < sizeof(buf)) { |
| 261 | chunk_size = TEMP_FAILURE_RETRY( |
| 262 | read(hwrandom_fd, buf, sizeof(buf) - total_bytes_written)); |
| 263 | if (chunk_size == -1) { |
| 264 | ERROR("Failed to read from /dev/hw_random: %s\n", strerror(errno)); |
| 265 | goto ret; |
| 266 | } else if (chunk_size == 0) { |
| 267 | ERROR("Failed to read from /dev/hw_random: EOF\n"); |
| 268 | goto ret; |
| 269 | } |
| 270 | |
| 271 | chunk_size = TEMP_FAILURE_RETRY(write(urandom_fd, buf, chunk_size)); |
| 272 | if (chunk_size == -1) { |
| 273 | ERROR("Failed to write to /dev/urandom: %s\n", strerror(errno)); |
| 274 | goto ret; |
| 275 | } |
| 276 | total_bytes_written += chunk_size; |
| 277 | } |
| 278 | |
Elliott Hughes | ccecf14 | 2014-01-16 10:53:11 -0800 | [diff] [blame] | 279 | INFO("Mixed %zu bytes from /dev/hw_random into /dev/urandom", |
Alex Klyubin | 0d872d8 | 2013-08-16 13:19:24 -0700 | [diff] [blame] | 280 | total_bytes_written); |
| 281 | result = 0; |
| 282 | |
| 283 | ret: |
| 284 | if (hwrandom_fd != -1) { |
| 285 | close(hwrandom_fd); |
| 286 | } |
| 287 | if (urandom_fd != -1) { |
| 288 | close(urandom_fd); |
| 289 | } |
Alex Klyubin | 0d872d8 | 2013-08-16 13:19:24 -0700 | [diff] [blame] | 290 | return result; |
| 291 | } |
| 292 | |
dcashman | c819e78 | 2016-03-17 15:01:56 -0700 | [diff] [blame^] | 293 | static void security_failure() { |
| 294 | ERROR("Security failure; rebooting into recovery mode...\n"); |
| 295 | android_reboot(ANDROID_RB_RESTART2, 0, "recovery"); |
| 296 | while (true) { pause(); } // never reached |
| 297 | } |
| 298 | |
| 299 | #define MMAP_RND_PATH "/proc/sys/vm/mmap_rnd_bits" |
| 300 | #define MMAP_RND_COMPAT_PATH "/proc/sys/vm/mmap_rnd_compat_bits" |
| 301 | |
| 302 | /* __attribute__((unused)) due to lack of mips support: see mips block |
| 303 | * in set_mmap_rnd_bits_action */ |
| 304 | static bool __attribute__((unused)) set_mmap_rnd_bits_min(int start, int min, bool compat) { |
| 305 | std::string path; |
| 306 | if (compat) { |
| 307 | path = MMAP_RND_COMPAT_PATH; |
| 308 | } else { |
| 309 | path = MMAP_RND_PATH; |
| 310 | } |
| 311 | std::ifstream inf(path, std::fstream::in); |
| 312 | if (!inf) { |
| 313 | return false; |
| 314 | } |
| 315 | while (start >= min) { |
| 316 | // try to write out new value |
| 317 | std::string str_val = std::to_string(start); |
| 318 | std::ofstream of(path, std::fstream::out); |
| 319 | if (!of) { |
| 320 | return false; |
| 321 | } |
| 322 | of << str_val << std::endl; |
| 323 | of.close(); |
| 324 | |
| 325 | // check to make sure it was recorded |
| 326 | inf.seekg(0); |
| 327 | std::string str_rec; |
| 328 | inf >> str_rec; |
| 329 | if (str_val.compare(str_rec) == 0) { |
| 330 | break; |
| 331 | } |
| 332 | start--; |
| 333 | } |
| 334 | inf.close(); |
| 335 | return (start >= min); |
| 336 | } |
| 337 | |
| 338 | /* |
| 339 | * Set /proc/sys/vm/mmap_rnd_bits and potentially |
| 340 | * /proc/sys/vm/mmap_rnd_compat_bits to the maximum supported values. |
| 341 | * Returns -1 if unable to set these to an acceptable value. Apply |
| 342 | * upstream patch-sets https://lkml.org/lkml/2015/12/21/337 and |
| 343 | * https://lkml.org/lkml/2016/2/4/831 to enable this. |
| 344 | */ |
| 345 | static int set_mmap_rnd_bits_action(const std::vector<std::string>& args) |
| 346 | { |
| 347 | int ret = -1; |
| 348 | |
| 349 | /* values are arch-dependent */ |
| 350 | #if defined(__aarch64__) |
| 351 | /* arm64 supports 18 - 33 bits depending on pagesize and VA_SIZE */ |
| 352 | if (set_mmap_rnd_bits_min(33, 24, false) |
| 353 | && set_mmap_rnd_bits_min(16, 16, true)) { |
| 354 | ret = 0; |
| 355 | } |
| 356 | #elif defined(__x86__64__) |
| 357 | /* x86_64 supports 28 - 32 bits */ |
| 358 | if (set_mmap_rnd_bits_min(32, 32, false) |
| 359 | && set_mmap_rnd_bits_min(16, 16, true)) { |
| 360 | ret = 0; |
| 361 | } |
| 362 | #elif defined(__arm__) || defined(__i386__) |
| 363 | /* check to see if we're running on 64-bit kernel */ |
| 364 | bool h64 = !access(MMAP_RND_COMPAT_PATH, F_OK); |
| 365 | /* supported 32-bit architecture must have 16 bits set */ |
| 366 | if (set_mmap_rnd_bits_min(16, 16, h64)) { |
| 367 | ret = 0; |
| 368 | } |
| 369 | #elif defined(__mips__) || defined(__mips64__) |
| 370 | // TODO: add mips support b/27788820 |
| 371 | ret = 0; |
| 372 | #else |
| 373 | ERROR("Unknown architecture\n"); |
| 374 | #endif |
| 375 | if (ret == -1) { |
| 376 | ERROR("Unable to set adequate mmap entropy value!\n"); |
| 377 | security_failure(); |
| 378 | } |
| 379 | return ret; |
| 380 | } |
| 381 | |
Tom Cherry | 96f6731 | 2015-07-30 13:52:55 -0700 | [diff] [blame] | 382 | static int keychord_init_action(const std::vector<std::string>& args) |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 383 | { |
| 384 | keychord_init(); |
| 385 | return 0; |
| 386 | } |
| 387 | |
Tom Cherry | 96f6731 | 2015-07-30 13:52:55 -0700 | [diff] [blame] | 388 | static int console_init_action(const std::vector<std::string>& args) |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 389 | { |
Viorel Suman | efc7275 | 2016-03-21 10:23:43 +0200 | [diff] [blame] | 390 | std::string console = property_get("ro.boot.console"); |
| 391 | if (!console.empty()) { |
Viorel Suman | 70daa67 | 2016-03-21 10:08:07 +0200 | [diff] [blame] | 392 | default_console = "/dev/" + console; |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 393 | } |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 394 | return 0; |
| 395 | } |
| 396 | |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 397 | static void import_kernel_nv(const std::string& key, const std::string& value, bool for_emulator) { |
| 398 | if (key.empty()) return; |
Dima Zavin | 5511c84 | 2011-12-19 11:21:32 -0800 | [diff] [blame] | 399 | |
| 400 | if (for_emulator) { |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 401 | // In the emulator, export any kernel option with the "ro.kernel." prefix. |
| 402 | property_set(android::base::StringPrintf("ro.kernel.%s", key.c_str()).c_str(), value.c_str()); |
Dima Zavin | 5511c84 | 2011-12-19 11:21:32 -0800 | [diff] [blame] | 403 | return; |
| 404 | } |
| 405 | |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 406 | if (key == "qemu") { |
| 407 | strlcpy(qemu, value.c_str(), sizeof(qemu)); |
| 408 | } else if (android::base::StartsWith(key, "androidboot.")) { |
| 409 | property_set(android::base::StringPrintf("ro.boot.%s", key.c_str() + 12).c_str(), |
| 410 | value.c_str()); |
Dima Zavin | 5511c84 | 2011-12-19 11:21:32 -0800 | [diff] [blame] | 411 | } |
| 412 | } |
| 413 | |
Sami Tolvanen | 9e9efca | 2015-12-07 12:33:58 +0000 | [diff] [blame] | 414 | static void export_oem_lock_status() { |
| 415 | if (property_get("ro.oem_unlock_supported") != "1") { |
| 416 | return; |
| 417 | } |
| 418 | |
| 419 | std::string value = property_get("ro.boot.verifiedbootstate"); |
| 420 | |
| 421 | if (!value.empty()) { |
| 422 | property_set("ro.boot.flash.locked", value == "orange" ? "0" : "1"); |
| 423 | } |
| 424 | } |
| 425 | |
Elliott Hughes | d679bc9 | 2015-03-20 08:50:46 -0700 | [diff] [blame] | 426 | static void export_kernel_boot_props() { |
Dima Zavin | 5511c84 | 2011-12-19 11:21:32 -0800 | [diff] [blame] | 427 | struct { |
| 428 | const char *src_prop; |
Elliott Hughes | d679bc9 | 2015-03-20 08:50:46 -0700 | [diff] [blame] | 429 | const char *dst_prop; |
| 430 | const char *default_value; |
Dima Zavin | 5511c84 | 2011-12-19 11:21:32 -0800 | [diff] [blame] | 431 | } prop_map[] = { |
Elliott Hughes | d679bc9 | 2015-03-20 08:50:46 -0700 | [diff] [blame] | 432 | { "ro.boot.serialno", "ro.serialno", "", }, |
| 433 | { "ro.boot.mode", "ro.bootmode", "unknown", }, |
| 434 | { "ro.boot.baseband", "ro.baseband", "unknown", }, |
Dima Zavin | 5511c84 | 2011-12-19 11:21:32 -0800 | [diff] [blame] | 435 | { "ro.boot.bootloader", "ro.bootloader", "unknown", }, |
Elliott Hughes | d679bc9 | 2015-03-20 08:50:46 -0700 | [diff] [blame] | 436 | { "ro.boot.hardware", "ro.hardware", "unknown", }, |
| 437 | { "ro.boot.revision", "ro.revision", "0", }, |
Dima Zavin | 5511c84 | 2011-12-19 11:21:32 -0800 | [diff] [blame] | 438 | }; |
Elliott Hughes | d679bc9 | 2015-03-20 08:50:46 -0700 | [diff] [blame] | 439 | for (size_t i = 0; i < ARRAY_SIZE(prop_map); i++) { |
Yabin Cui | 74edcea | 2015-07-24 10:11:05 -0700 | [diff] [blame] | 440 | std::string value = property_get(prop_map[i].src_prop); |
| 441 | property_set(prop_map[i].dst_prop, (!value.empty()) ? value.c_str() : prop_map[i].default_value); |
Dima Zavin | 5511c84 | 2011-12-19 11:21:32 -0800 | [diff] [blame] | 442 | } |
Dima Zavin | 5511c84 | 2011-12-19 11:21:32 -0800 | [diff] [blame] | 443 | } |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 444 | |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 445 | static void process_kernel_dt() { |
Rom Lemarchand | 6a52443 | 2015-02-28 06:39:11 -0800 | [diff] [blame] | 446 | static const char android_dir[] = "/proc/device-tree/firmware/android"; |
| 447 | |
| 448 | std::string file_name = android::base::StringPrintf("%s/compatible", android_dir); |
| 449 | |
| 450 | std::string dt_file; |
| 451 | android::base::ReadFileToString(file_name, &dt_file); |
| 452 | if (!dt_file.compare("android,firmware")) { |
| 453 | ERROR("firmware/android is not compatible with 'android,firmware'\n"); |
| 454 | return; |
| 455 | } |
| 456 | |
| 457 | std::unique_ptr<DIR, int(*)(DIR*)>dir(opendir(android_dir), closedir); |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 458 | if (!dir) return; |
Rom Lemarchand | 6a52443 | 2015-02-28 06:39:11 -0800 | [diff] [blame] | 459 | |
| 460 | struct dirent *dp; |
| 461 | while ((dp = readdir(dir.get())) != NULL) { |
Rom Lemarchand | 1dcf325 | 2015-11-08 17:51:50 -0800 | [diff] [blame] | 462 | if (dp->d_type != DT_REG || !strcmp(dp->d_name, "compatible") || !strcmp(dp->d_name, "name")) { |
Rom Lemarchand | 6a52443 | 2015-02-28 06:39:11 -0800 | [diff] [blame] | 463 | continue; |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 464 | } |
Rom Lemarchand | 6a52443 | 2015-02-28 06:39:11 -0800 | [diff] [blame] | 465 | |
| 466 | file_name = android::base::StringPrintf("%s/%s", android_dir, dp->d_name); |
| 467 | |
| 468 | android::base::ReadFileToString(file_name, &dt_file); |
| 469 | std::replace(dt_file.begin(), dt_file.end(), ',', '.'); |
| 470 | |
| 471 | std::string property_name = android::base::StringPrintf("ro.boot.%s", dp->d_name); |
Elliott Hughes | db3f267 | 2015-03-20 09:45:18 -0700 | [diff] [blame] | 472 | property_set(property_name.c_str(), dt_file.c_str()); |
Rom Lemarchand | 6a52443 | 2015-02-28 06:39:11 -0800 | [diff] [blame] | 473 | } |
| 474 | } |
| 475 | |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 476 | static void process_kernel_cmdline() { |
| 477 | // Don't expose the raw commandline to unprivileged processes. |
Dima Zavin | 5511c84 | 2011-12-19 11:21:32 -0800 | [diff] [blame] | 478 | chmod("/proc/cmdline", 0440); |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 479 | |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 480 | // The first pass does the common stuff, and finds if we are in qemu. |
| 481 | // The second pass is only necessary for qemu to export all kernel params |
| 482 | // as properties. |
Nick Kralevich | f667a32 | 2015-04-25 17:42:52 -0700 | [diff] [blame] | 483 | import_kernel_cmdline(false, import_kernel_nv); |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 484 | if (qemu[0]) import_kernel_cmdline(true, import_kernel_nv); |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 485 | } |
| 486 | |
Tom Cherry | 96f6731 | 2015-07-30 13:52:55 -0700 | [diff] [blame] | 487 | static int queue_property_triggers_action(const std::vector<std::string>& args) |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 488 | { |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 489 | ActionManager::GetInstance().QueueAllPropertyTriggers(); |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 490 | /* enable property triggers */ |
| 491 | property_triggers_enabled = 1; |
| 492 | return 0; |
| 493 | } |
| 494 | |
Elliott Hughes | c6c26ed | 2015-04-24 18:50:30 -0700 | [diff] [blame] | 495 | static void selinux_init_all_handles(void) |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 496 | { |
Stephen Smalley | ae6f3d7 | 2012-05-01 15:02:53 -0400 | [diff] [blame] | 497 | sehandle = selinux_android_file_context_handle(); |
Stephen Smalley | dbd37f2 | 2014-01-28 10:34:09 -0500 | [diff] [blame] | 498 | selinux_android_set_sehandle(sehandle); |
rpcraig | 63207cd | 2012-08-09 10:05:49 -0400 | [diff] [blame] | 499 | sehandle_prop = selinux_android_prop_context_handle(); |
Stephen Smalley | ae6f3d7 | 2012-05-01 15:02:53 -0400 | [diff] [blame] | 500 | } |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 501 | |
Nick Kralevich | d34e407 | 2015-04-28 12:39:41 -0700 | [diff] [blame] | 502 | enum selinux_enforcing_status { SELINUX_PERMISSIVE, SELINUX_ENFORCING }; |
Nick Kralevich | f667a32 | 2015-04-25 17:42:52 -0700 | [diff] [blame] | 503 | |
| 504 | static selinux_enforcing_status selinux_status_from_cmdline() { |
| 505 | selinux_enforcing_status status = SELINUX_ENFORCING; |
| 506 | |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 507 | import_kernel_cmdline(false, [&](const std::string& key, const std::string& value, bool in_qemu) { |
| 508 | if (key == "androidboot.selinux" && value == "permissive") { |
| 509 | status = SELINUX_PERMISSIVE; |
Nick Kralevich | f667a32 | 2015-04-25 17:42:52 -0700 | [diff] [blame] | 510 | } |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 511 | }); |
Nick Kralevich | f667a32 | 2015-04-25 17:42:52 -0700 | [diff] [blame] | 512 | |
| 513 | return status; |
| 514 | } |
| 515 | |
Nick Kralevich | 935bd3e | 2013-06-26 15:37:26 -0700 | [diff] [blame] | 516 | static bool selinux_is_enforcing(void) |
| 517 | { |
Nick Kralevich | d34e407 | 2015-04-28 12:39:41 -0700 | [diff] [blame] | 518 | if (ALLOW_PERMISSIVE_SELINUX) { |
Nick Kralevich | f667a32 | 2015-04-25 17:42:52 -0700 | [diff] [blame] | 519 | return selinux_status_from_cmdline() == SELINUX_ENFORCING; |
Nick Kralevich | 935bd3e | 2013-06-26 15:37:26 -0700 | [diff] [blame] | 520 | } |
Nick Kralevich | 935bd3e | 2013-06-26 15:37:26 -0700 | [diff] [blame] | 521 | return true; |
| 522 | } |
| 523 | |
Elliott Hughes | da40c00 | 2015-03-27 23:20:44 -0700 | [diff] [blame] | 524 | static int audit_callback(void *data, security_class_t /*cls*/, char *buf, size_t len) { |
William Roberts | d7aea44 | 2015-10-01 16:03:47 -0700 | [diff] [blame] | 525 | |
| 526 | property_audit_data *d = reinterpret_cast<property_audit_data*>(data); |
| 527 | |
| 528 | if (!d || !d->name || !d->cr) { |
| 529 | ERROR("audit_callback invoked with null data arguments!"); |
| 530 | return 0; |
| 531 | } |
| 532 | |
| 533 | snprintf(buf, len, "property=%s pid=%d uid=%d gid=%d", d->name, |
| 534 | d->cr->pid, d->cr->uid, d->cr->gid); |
rpcraig | 63207cd | 2012-08-09 10:05:49 -0400 | [diff] [blame] | 535 | return 0; |
| 536 | } |
| 537 | |
Elliott Hughes | f65730e | 2015-04-24 18:38:17 +0000 | [diff] [blame] | 538 | static void selinux_initialize(bool in_kernel_domain) { |
Elliott Hughes | da40c00 | 2015-03-27 23:20:44 -0700 | [diff] [blame] | 539 | Timer t; |
Stephen Smalley | eb3f421 | 2014-02-12 16:17:00 -0500 | [diff] [blame] | 540 | |
Elliott Hughes | da40c00 | 2015-03-27 23:20:44 -0700 | [diff] [blame] | 541 | selinux_callback cb; |
| 542 | cb.func_log = selinux_klog_callback; |
| 543 | selinux_set_callback(SELINUX_CB_LOG, cb); |
| 544 | cb.func_audit = audit_callback; |
| 545 | selinux_set_callback(SELINUX_CB_AUDIT, cb); |
| 546 | |
Elliott Hughes | f65730e | 2015-04-24 18:38:17 +0000 | [diff] [blame] | 547 | if (in_kernel_domain) { |
Elliott Hughes | f65730e | 2015-04-24 18:38:17 +0000 | [diff] [blame] | 548 | INFO("Loading SELinux policy...\n"); |
| 549 | if (selinux_android_load_policy() < 0) { |
| 550 | ERROR("failed to load policy: %s\n", strerror(errno)); |
| 551 | security_failure(); |
| 552 | } |
| 553 | |
Nick Kralevich | d34e407 | 2015-04-28 12:39:41 -0700 | [diff] [blame] | 554 | bool kernel_enforcing = (security_getenforce() == 1); |
Elliott Hughes | f65730e | 2015-04-24 18:38:17 +0000 | [diff] [blame] | 555 | bool is_enforcing = selinux_is_enforcing(); |
Nick Kralevich | d34e407 | 2015-04-28 12:39:41 -0700 | [diff] [blame] | 556 | if (kernel_enforcing != is_enforcing) { |
| 557 | if (security_setenforce(is_enforcing)) { |
| 558 | ERROR("security_setenforce(%s) failed: %s\n", |
| 559 | is_enforcing ? "true" : "false", strerror(errno)); |
| 560 | security_failure(); |
| 561 | } |
| 562 | } |
Elliott Hughes | f65730e | 2015-04-24 18:38:17 +0000 | [diff] [blame] | 563 | |
Nick Kralevich | eedbe81 | 2015-04-25 14:10:03 -0700 | [diff] [blame] | 564 | if (write_file("/sys/fs/selinux/checkreqprot", "0") == -1) { |
| 565 | security_failure(); |
| 566 | } |
| 567 | |
Elliott Hughes | f65730e | 2015-04-24 18:38:17 +0000 | [diff] [blame] | 568 | NOTICE("(Initializing SELinux %s took %.2fs.)\n", |
| 569 | is_enforcing ? "enforcing" : "non-enforcing", t.duration()); |
| 570 | } else { |
| 571 | selinux_init_all_handles(); |
Nick Kralevich | 56fa0ac | 2013-06-24 17:41:40 -0700 | [diff] [blame] | 572 | } |
Nick Kralevich | 56fa0ac | 2013-06-24 17:41:40 -0700 | [diff] [blame] | 573 | } |
| 574 | |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 575 | int main(int argc, char** argv) { |
Elliott Hughes | da40c00 | 2015-03-27 23:20:44 -0700 | [diff] [blame] | 576 | if (!strcmp(basename(argv[0]), "ueventd")) { |
Colin Cross | f83d0b9 | 2010-04-21 12:04:20 -0700 | [diff] [blame] | 577 | return ueventd_main(argc, argv); |
Elliott Hughes | da40c00 | 2015-03-27 23:20:44 -0700 | [diff] [blame] | 578 | } |
Colin Cross | f83d0b9 | 2010-04-21 12:04:20 -0700 | [diff] [blame] | 579 | |
Elliott Hughes | da40c00 | 2015-03-27 23:20:44 -0700 | [diff] [blame] | 580 | if (!strcmp(basename(argv[0]), "watchdogd")) { |
Arve Hjønnevåg | d97d907 | 2012-06-13 21:51:56 -0700 | [diff] [blame] | 581 | return watchdogd_main(argc, argv); |
Elliott Hughes | da40c00 | 2015-03-27 23:20:44 -0700 | [diff] [blame] | 582 | } |
Arve Hjønnevåg | d97d907 | 2012-06-13 21:51:56 -0700 | [diff] [blame] | 583 | |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 584 | // Clear the umask. |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 585 | umask(0); |
| 586 | |
Elliott Hughes | cc86fb2 | 2015-03-17 20:01:13 -0700 | [diff] [blame] | 587 | add_environment("PATH", _PATH_DEFPATH); |
| 588 | |
Nick Kralevich | 9dec93b | 2015-04-25 15:50:03 -0700 | [diff] [blame] | 589 | bool is_first_stage = (argc == 1) || (strcmp(argv[1], "--second-stage") != 0); |
| 590 | |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 591 | // Get the basic filesystem setup we need put together in the initramdisk |
| 592 | // on / and then we'll let the rc file figure out the rest. |
Nick Kralevich | 9dec93b | 2015-04-25 15:50:03 -0700 | [diff] [blame] | 593 | if (is_first_stage) { |
Nick Kralevich | f667a32 | 2015-04-25 17:42:52 -0700 | [diff] [blame] | 594 | mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755"); |
| 595 | mkdir("/dev/pts", 0755); |
| 596 | mkdir("/dev/socket", 0755); |
| 597 | mount("devpts", "/dev/pts", "devpts", 0, NULL); |
Nick Kralevich | c39ba5a | 2015-11-07 16:52:17 -0800 | [diff] [blame] | 598 | #define MAKE_STR(x) __STRING(x) |
| 599 | mount("proc", "/proc", "proc", 0, "hidepid=2,gid=" MAKE_STR(AID_READPROC)); |
Nick Kralevich | 9dec93b | 2015-04-25 15:50:03 -0700 | [diff] [blame] | 600 | mount("sysfs", "/sys", "sysfs", 0, NULL); |
Nick Kralevich | 3d9e273 | 2016-03-03 10:40:12 -0800 | [diff] [blame] | 601 | mount("selinuxfs", "/sys/fs/selinux", "selinuxfs", 0, NULL); |
Nick Kralevich | 9dec93b | 2015-04-25 15:50:03 -0700 | [diff] [blame] | 602 | } |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 603 | |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 604 | // We must have some place other than / to create the device nodes for |
| 605 | // kmsg and null, otherwise we won't be able to remount / read-only |
| 606 | // later on. Now that tmpfs is mounted on /dev, we can actually talk |
| 607 | // to the outside world. |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 608 | open_devnull_stdio(); |
Dima Zavin | 8f91282 | 2011-08-31 18:26:17 -0700 | [diff] [blame] | 609 | klog_init(); |
Elliott Hughes | da40c00 | 2015-03-27 23:20:44 -0700 | [diff] [blame] | 610 | klog_set_level(KLOG_NOTICE_LEVEL); |
| 611 | |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 612 | NOTICE("init %s started!\n", is_first_stage ? "first stage" : "second stage"); |
Elliott Hughes | da40c00 | 2015-03-27 23:20:44 -0700 | [diff] [blame] | 613 | |
Nick Kralevich | f667a32 | 2015-04-25 17:42:52 -0700 | [diff] [blame] | 614 | if (!is_first_stage) { |
| 615 | // Indicate that booting is in progress to background fw loaders, etc. |
| 616 | close(open("/dev/.booting", O_WRONLY | O_CREAT | O_CLOEXEC, 0000)); |
Vladimir Chtchetkine | 2b99543 | 2011-09-28 09:55:31 -0700 | [diff] [blame] | 617 | |
Nick Kralevich | f667a32 | 2015-04-25 17:42:52 -0700 | [diff] [blame] | 618 | property_init(); |
Dima Zavin | 5511c84 | 2011-12-19 11:21:32 -0800 | [diff] [blame] | 619 | |
Nick Kralevich | f667a32 | 2015-04-25 17:42:52 -0700 | [diff] [blame] | 620 | // If arguments are passed both on the command line and in DT, |
| 621 | // properties set in DT always have priority over the command-line ones. |
| 622 | process_kernel_dt(); |
| 623 | process_kernel_cmdline(); |
| 624 | |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 625 | // Propagate the kernel variables to internal variables |
Nick Kralevich | f667a32 | 2015-04-25 17:42:52 -0700 | [diff] [blame] | 626 | // used by init as well as the current required properties. |
| 627 | export_kernel_boot_props(); |
| 628 | } |
Rom Lemarchand | 6a52443 | 2015-02-28 06:39:11 -0800 | [diff] [blame] | 629 | |
Elliott Hughes | f65730e | 2015-04-24 18:38:17 +0000 | [diff] [blame] | 630 | // Set up SELinux, including loading the SELinux policy if we're in the kernel domain. |
| 631 | selinux_initialize(is_first_stage); |
| 632 | |
| 633 | // If we're in the kernel domain, re-exec init to transition to the init domain now |
| 634 | // that the SELinux policy has been loaded. |
| 635 | if (is_first_stage) { |
| 636 | if (restorecon("/init") == -1) { |
| 637 | ERROR("restorecon failed: %s\n", strerror(errno)); |
| 638 | security_failure(); |
| 639 | } |
| 640 | char* path = argv[0]; |
| 641 | char* args[] = { path, const_cast<char*>("--second-stage"), nullptr }; |
| 642 | if (execv(path, args) == -1) { |
| 643 | ERROR("execv(\"%s\") failed: %s\n", path, strerror(errno)); |
| 644 | security_failure(); |
| 645 | } |
| 646 | } |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 647 | |
| 648 | // These directories were necessarily created before initial policy load |
| 649 | // and therefore need their security context restored to the proper value. |
| 650 | // This must happen before /dev is populated by ueventd. |
Elliott Hughes | e5ce30f | 2015-05-06 19:19:24 -0700 | [diff] [blame] | 651 | NOTICE("Running restorecon...\n"); |
Stephen Smalley | e096e36 | 2012-06-11 13:37:39 -0400 | [diff] [blame] | 652 | restorecon("/dev"); |
| 653 | restorecon("/dev/socket"); |
Geremy Condra | 8e15eab | 2013-02-28 17:29:58 -0800 | [diff] [blame] | 654 | restorecon("/dev/__properties__"); |
Tom Cherry | e36a85c | 2015-11-30 16:40:25 -0800 | [diff] [blame] | 655 | restorecon("/property_contexts"); |
Nick Kralevich | ae76f6d | 2013-07-11 15:38:26 -0700 | [diff] [blame] | 656 | restorecon_recursive("/sys"); |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 657 | |
Elliott Hughes | 929f407 | 2015-04-24 21:13:44 -0700 | [diff] [blame] | 658 | epoll_fd = epoll_create1(EPOLL_CLOEXEC); |
| 659 | if (epoll_fd == -1) { |
| 660 | ERROR("epoll_create1 failed: %s\n", strerror(errno)); |
| 661 | exit(1); |
| 662 | } |
| 663 | |
| 664 | signal_handler_init(); |
Elliott Hughes | 9042cae | 2015-04-24 17:43:21 -0700 | [diff] [blame] | 665 | |
Riley Andrews | e4b7b29 | 2014-06-16 15:06:21 -0700 | [diff] [blame] | 666 | property_load_boot_defaults(); |
Sami Tolvanen | 9e9efca | 2015-12-07 12:33:58 +0000 | [diff] [blame] | 667 | export_oem_lock_status(); |
Elliott Hughes | c6c26ed | 2015-04-24 18:50:30 -0700 | [diff] [blame] | 668 | start_property_service(); |
Dima Zavin | d7634c9 | 2011-12-16 14:18:06 -0800 | [diff] [blame] | 669 | |
Tom Cherry | b734990 | 2015-08-26 11:43:36 -0700 | [diff] [blame] | 670 | const BuiltinFunctionMap function_map; |
| 671 | Action::set_function_map(&function_map); |
| 672 | |
| 673 | Parser& parser = Parser::GetInstance(); |
| 674 | parser.AddSectionParser("service",std::make_unique<ServiceParser>()); |
| 675 | parser.AddSectionParser("on", std::make_unique<ActionParser>()); |
| 676 | parser.AddSectionParser("import", std::make_unique<ImportParser>()); |
| 677 | parser.ParseConfig("/init.rc"); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 678 | |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 679 | ActionManager& am = ActionManager::GetInstance(); |
| 680 | |
| 681 | am.QueueEventTrigger("early-init"); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 682 | |
Elliott Hughes | c6c26ed | 2015-04-24 18:50:30 -0700 | [diff] [blame] | 683 | // Queue an action that waits for coldboot done so we know ueventd has set up all of /dev... |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 684 | am.QueueBuiltinAction(wait_for_coldboot_done_action, "wait_for_coldboot_done"); |
Elliott Hughes | c6c26ed | 2015-04-24 18:50:30 -0700 | [diff] [blame] | 685 | // ... so that we can start queuing up actions that require stuff from /dev. |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 686 | am.QueueBuiltinAction(mix_hwrng_into_linux_rng_action, "mix_hwrng_into_linux_rng"); |
dcashman | c819e78 | 2016-03-17 15:01:56 -0700 | [diff] [blame^] | 687 | am.QueueBuiltinAction(set_mmap_rnd_bits_action, "set_mmap_rnd_bits"); |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 688 | am.QueueBuiltinAction(keychord_init_action, "keychord_init"); |
| 689 | am.QueueBuiltinAction(console_init_action, "console_init"); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 690 | |
Elliott Hughes | da40c00 | 2015-03-27 23:20:44 -0700 | [diff] [blame] | 691 | // Trigger all the boot actions to get us started. |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 692 | am.QueueEventTrigger("init"); |
Dima Zavin | ca47cef | 2011-08-24 15:28:23 -0700 | [diff] [blame] | 693 | |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 694 | // Repeat mix_hwrng_into_linux_rng in case /dev/hw_random or /dev/random |
| 695 | // wasn't ready immediately after wait_for_coldboot_done |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 696 | am.QueueBuiltinAction(mix_hwrng_into_linux_rng_action, "mix_hwrng_into_linux_rng"); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 697 | |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 698 | // Don't mount filesystems or start core system services in charger mode. |
Yabin Cui | 74edcea | 2015-07-24 10:11:05 -0700 | [diff] [blame] | 699 | std::string bootmode = property_get("ro.bootmode"); |
| 700 | if (bootmode == "charger") { |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 701 | am.QueueEventTrigger("charger"); |
Dima Zavin | ca47cef | 2011-08-24 15:28:23 -0700 | [diff] [blame] | 702 | } else { |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 703 | am.QueueEventTrigger("late-init"); |
Dima Zavin | ca47cef | 2011-08-24 15:28:23 -0700 | [diff] [blame] | 704 | } |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 705 | |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 706 | // Run all property triggers based on current state of the properties. |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 707 | am.QueueBuiltinAction(queue_property_triggers_action, "queue_property_triggers"); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 708 | |
Elliott Hughes | c6c26ed | 2015-04-24 18:50:30 -0700 | [diff] [blame] | 709 | while (true) { |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 710 | if (!waiting_for_exec) { |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 711 | am.ExecuteOneCommand(); |
Elliott Hughes | 8d82ea0 | 2015-02-06 20:15:18 -0800 | [diff] [blame] | 712 | restart_processes(); |
| 713 | } |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 714 | |
Yongqin Liu | a197ff1 | 2014-12-05 13:45:02 +0800 | [diff] [blame] | 715 | int timeout = -1; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 716 | if (process_needs_restart) { |
| 717 | timeout = (process_needs_restart - gettime()) * 1000; |
| 718 | if (timeout < 0) |
| 719 | timeout = 0; |
| 720 | } |
| 721 | |
Tom Cherry | fa0c21c | 2015-07-23 17:53:11 -0700 | [diff] [blame] | 722 | if (am.HasMoreCommands()) { |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 723 | timeout = 0; |
Elliott Hughes | c0e919c | 2015-02-04 14:46:36 -0800 | [diff] [blame] | 724 | } |
Colin Cross | ebc6ff1 | 2010-04-13 19:52:01 -0700 | [diff] [blame] | 725 | |
Yongqin Liu | a197ff1 | 2014-12-05 13:45:02 +0800 | [diff] [blame] | 726 | bootchart_sample(&timeout); |
Elliott Hughes | c0e919c | 2015-02-04 14:46:36 -0800 | [diff] [blame] | 727 | |
Elliott Hughes | 929f407 | 2015-04-24 21:13:44 -0700 | [diff] [blame] | 728 | epoll_event ev; |
| 729 | int nr = TEMP_FAILURE_RETRY(epoll_wait(epoll_fd, &ev, 1, timeout)); |
| 730 | if (nr == -1) { |
| 731 | ERROR("epoll_wait failed: %s\n", strerror(errno)); |
| 732 | } else if (nr == 1) { |
| 733 | ((void (*)()) ev.data.ptr)(); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 734 | } |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 735 | } |
| 736 | |
| 737 | return 0; |
| 738 | } |