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
17 #include "builtins.h"
18
19 #include <dirent.h>
20 #include <errno.h>
21 #include <fcntl.h>
22 #include <mntent.h>
23 #include <net/if.h>
24 #include <signal.h>
25 #include <sched.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <sys/socket.h>
30 #include <sys/mount.h>
31 #include <sys/resource.h>
32 #include <sys/syscall.h>
33 #include <sys/time.h>
34 #include <sys/types.h>
35 #include <sys/stat.h>
36 #include <sys/wait.h>
37 #include <unistd.h>
38 #include <linux/loop.h>
39 #include <ext4_crypt.h>
40 #include <ext4_crypt_init_extensions.h>
41
42 #include <selinux/selinux.h>
43 #include <selinux/label.h>
44
45 #include <fs_mgr.h>
46 #include <android-base/file.h>
47 #include <android-base/parseint.h>
48 #include <android-base/stringprintf.h>
49 #include <bootloader_message_writer.h>
50 #include <cutils/partition_utils.h>
51 #include <cutils/android_reboot.h>
52 #include <logwrap/logwrap.h>
53 #include <private/android_filesystem_config.h>
54
55 #include "action.h"
56 #include "bootchart.h"
57 #include "devices.h"
58 #include "init.h"
59 #include "init_parser.h"
60 #include "log.h"
61 #include "property_service.h"
62 #include "service.h"
63 #include "signal_handler.h"
64 #include "util.h"
65
66 #define chmod DO_NOT_USE_CHMOD_USE_FCHMODAT_SYMLINK_NOFOLLOW
67 #define UNMOUNT_CHECK_MS 5000
68 #define UNMOUNT_CHECK_TIMES 10
69
70 static const int kTerminateServiceDelayMicroSeconds = 50000;
71
insmod(const char * filename,const char * options)72 static int insmod(const char *filename, const char *options) {
73 int fd = open(filename, O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
74 if (fd == -1) {
75 ERROR("insmod: open(\"%s\") failed: %s", filename, strerror(errno));
76 return -1;
77 }
78 int rc = syscall(__NR_finit_module, fd, options, 0);
79 if (rc == -1) {
80 ERROR("finit_module for \"%s\" failed: %s", filename, strerror(errno));
81 }
82 close(fd);
83 return rc;
84 }
85
__ifupdown(const char * interface,int up)86 static int __ifupdown(const char *interface, int up) {
87 struct ifreq ifr;
88 int s, ret;
89
90 strlcpy(ifr.ifr_name, interface, IFNAMSIZ);
91
92 s = socket(AF_INET, SOCK_DGRAM, 0);
93 if (s < 0)
94 return -1;
95
96 ret = ioctl(s, SIOCGIFFLAGS, &ifr);
97 if (ret < 0) {
98 goto done;
99 }
100
101 if (up)
102 ifr.ifr_flags |= IFF_UP;
103 else
104 ifr.ifr_flags &= ~IFF_UP;
105
106 ret = ioctl(s, SIOCSIFFLAGS, &ifr);
107
108 done:
109 close(s);
110 return ret;
111 }
112
113 // Turn off backlight while we are performing power down cleanup activities.
turnOffBacklight()114 static void turnOffBacklight() {
115 static const char off[] = "0";
116
117 android::base::WriteStringToFile(off, "/sys/class/leds/lcd-backlight/brightness");
118
119 static const char backlightDir[] = "/sys/class/backlight";
120 std::unique_ptr<DIR, int(*)(DIR*)> dir(opendir(backlightDir), closedir);
121 if (!dir) {
122 return;
123 }
124
125 struct dirent *dp;
126 while ((dp = readdir(dir.get())) != NULL) {
127 if (((dp->d_type != DT_DIR) && (dp->d_type != DT_LNK)) ||
128 (dp->d_name[0] == '.')) {
129 continue;
130 }
131
132 std::string fileName = android::base::StringPrintf("%s/%s/brightness",
133 backlightDir,
134 dp->d_name);
135 android::base::WriteStringToFile(off, fileName);
136 }
137 }
138
wipe_data_via_recovery(const std::string & reason)139 static int wipe_data_via_recovery(const std::string& reason) {
140 const std::vector<std::string> options = {"--wipe_data", std::string() + "--reason=" + reason};
141 std::string err;
142 if (!write_bootloader_message(options, &err)) {
143 ERROR("failed to set bootloader message: %s", err.c_str());
144 return -1;
145 }
146 android_reboot(ANDROID_RB_RESTART2, 0, "recovery");
147 while (1) { pause(); } // never reached
148 }
149
unmount_and_fsck(const struct mntent * entry)150 static void unmount_and_fsck(const struct mntent *entry) {
151 if (strcmp(entry->mnt_type, "f2fs") && strcmp(entry->mnt_type, "ext4"))
152 return;
153
154 /* First, lazily unmount the directory. This unmount request finishes when
155 * all processes that open a file or directory in |entry->mnt_dir| exit.
156 */
157 TEMP_FAILURE_RETRY(umount2(entry->mnt_dir, MNT_DETACH));
158
159 /* Next, kill all processes except init, kthreadd, and kthreadd's
160 * children to finish the lazy unmount. Killing all processes here is okay
161 * because this callback function is only called right before reboot().
162 * It might be cleaner to selectively kill processes that actually use
163 * |entry->mnt_dir| rather than killing all, probably by reusing a function
164 * like killProcessesWithOpenFiles() in vold/, but the selinux policy does
165 * not allow init to scan /proc/<pid> files which the utility function
166 * heavily relies on. The policy does not allow the process to execute
167 * killall/pkill binaries either. Note that some processes might
168 * automatically restart after kill(), but that is not really a problem
169 * because |entry->mnt_dir| is no longer visible to such new processes.
170 */
171 ServiceManager::GetInstance().ForEachService([] (Service* s) { s->Stop(); });
172 TEMP_FAILURE_RETRY(kill(-1, SIGKILL));
173
174 // Restart Watchdogd to allow us to complete umounting and fsck
175 Service *svc = ServiceManager::GetInstance().FindServiceByName("watchdogd");
176 if (svc) {
177 do {
178 sched_yield(); // do not be so eager, let cleanup have priority
179 ServiceManager::GetInstance().ReapAnyOutstandingChildren();
180 } while (svc->flags() & SVC_RUNNING); // Paranoid Cargo
181 svc->Start();
182 }
183
184 turnOffBacklight();
185
186 int count = 0;
187 while (count++ < UNMOUNT_CHECK_TIMES) {
188 int fd = TEMP_FAILURE_RETRY(open(entry->mnt_fsname, O_RDONLY | O_EXCL));
189 if (fd >= 0) {
190 /* |entry->mnt_dir| has sucessfully been unmounted. */
191 close(fd);
192 break;
193 } else if (errno == EBUSY) {
194 /* Some processes using |entry->mnt_dir| are still alive. Wait for a
195 * while then retry.
196 */
197 TEMP_FAILURE_RETRY(
198 usleep(UNMOUNT_CHECK_MS * 1000 / UNMOUNT_CHECK_TIMES));
199 continue;
200 } else {
201 /* Cannot open the device. Give up. */
202 return;
203 }
204 }
205
206 // NB: With watchdog still running, there is no cap on the time it takes
207 // to complete the fsck, from the users perspective the device graphics
208 // and responses are locked-up and they may choose to hold the power
209 // button in frustration if it drags out.
210
211 int st;
212 if (!strcmp(entry->mnt_type, "f2fs")) {
213 const char *f2fs_argv[] = {
214 "/system/bin/fsck.f2fs", "-f", entry->mnt_fsname,
215 };
216 android_fork_execvp_ext(ARRAY_SIZE(f2fs_argv), (char **)f2fs_argv,
217 &st, true, LOG_KLOG, true, NULL, NULL, 0);
218 } else if (!strcmp(entry->mnt_type, "ext4")) {
219 const char *ext4_argv[] = {
220 "/system/bin/e2fsck", "-f", "-y", entry->mnt_fsname,
221 };
222 android_fork_execvp_ext(ARRAY_SIZE(ext4_argv), (char **)ext4_argv,
223 &st, true, LOG_KLOG, true, NULL, NULL, 0);
224 }
225 }
226
do_class_start(const std::vector<std::string> & args)227 static int do_class_start(const std::vector<std::string>& args) {
228 /* Starting a class does not start services
229 * which are explicitly disabled. They must
230 * be started individually.
231 */
232 ServiceManager::GetInstance().
233 ForEachServiceInClass(args[1], [] (Service* s) { s->StartIfNotDisabled(); });
234 return 0;
235 }
236
do_class_stop(const std::vector<std::string> & args)237 static int do_class_stop(const std::vector<std::string>& args) {
238 ServiceManager::GetInstance().
239 ForEachServiceInClass(args[1], [] (Service* s) { s->Stop(); });
240 return 0;
241 }
242
do_class_reset(const std::vector<std::string> & args)243 static int do_class_reset(const std::vector<std::string>& args) {
244 ServiceManager::GetInstance().
245 ForEachServiceInClass(args[1], [] (Service* s) { s->Reset(); });
246 return 0;
247 }
248
do_domainname(const std::vector<std::string> & args)249 static int do_domainname(const std::vector<std::string>& args) {
250 return write_file("/proc/sys/kernel/domainname", args[1].c_str());
251 }
252
do_enable(const std::vector<std::string> & args)253 static int do_enable(const std::vector<std::string>& args) {
254 Service* svc = ServiceManager::GetInstance().FindServiceByName(args[1]);
255 if (!svc) {
256 return -1;
257 }
258 return svc->Enable();
259 }
260
do_exec(const std::vector<std::string> & args)261 static int do_exec(const std::vector<std::string>& args) {
262 Service* svc = ServiceManager::GetInstance().MakeExecOneshotService(args);
263 if (!svc) {
264 return -1;
265 }
266 if (!svc->Start()) {
267 return -1;
268 }
269 waiting_for_exec = true;
270 return 0;
271 }
272
do_export(const std::vector<std::string> & args)273 static int do_export(const std::vector<std::string>& args) {
274 return add_environment(args[1].c_str(), args[2].c_str());
275 }
276
do_hostname(const std::vector<std::string> & args)277 static int do_hostname(const std::vector<std::string>& args) {
278 return write_file("/proc/sys/kernel/hostname", args[1].c_str());
279 }
280
do_ifup(const std::vector<std::string> & args)281 static int do_ifup(const std::vector<std::string>& args) {
282 return __ifupdown(args[1].c_str(), 1);
283 }
284
do_insmod(const std::vector<std::string> & args)285 static int do_insmod(const std::vector<std::string>& args) {
286 std::string options;
287
288 if (args.size() > 2) {
289 options += args[2];
290 for (std::size_t i = 3; i < args.size(); ++i) {
291 options += ' ';
292 options += args[i];
293 }
294 }
295
296 return insmod(args[1].c_str(), options.c_str());
297 }
298
do_mkdir(const std::vector<std::string> & args)299 static int do_mkdir(const std::vector<std::string>& args) {
300 mode_t mode = 0755;
301 int ret;
302
303 /* mkdir <path> [mode] [owner] [group] */
304
305 if (args.size() >= 3) {
306 mode = std::stoul(args[2], 0, 8);
307 }
308
309 ret = make_dir(args[1].c_str(), mode);
310 /* chmod in case the directory already exists */
311 if (ret == -1 && errno == EEXIST) {
312 ret = fchmodat(AT_FDCWD, args[1].c_str(), mode, AT_SYMLINK_NOFOLLOW);
313 }
314 if (ret == -1) {
315 return -errno;
316 }
317
318 if (args.size() >= 4) {
319 uid_t uid = decode_uid(args[3].c_str());
320 gid_t gid = -1;
321
322 if (args.size() == 5) {
323 gid = decode_uid(args[4].c_str());
324 }
325
326 if (lchown(args[1].c_str(), uid, gid) == -1) {
327 return -errno;
328 }
329
330 /* chown may have cleared S_ISUID and S_ISGID, chmod again */
331 if (mode & (S_ISUID | S_ISGID)) {
332 ret = fchmodat(AT_FDCWD, args[1].c_str(), mode, AT_SYMLINK_NOFOLLOW);
333 if (ret == -1) {
334 return -errno;
335 }
336 }
337 }
338
339 if (e4crypt_is_native()) {
340 if (e4crypt_set_directory_policy(args[1].c_str())) {
341 wipe_data_via_recovery(std::string() + "set_policy_failed:" + args[1]);
342 return -1;
343 }
344 }
345 return 0;
346 }
347
348 static struct {
349 const char *name;
350 unsigned flag;
351 } mount_flags[] = {
352 { "noatime", MS_NOATIME },
353 { "noexec", MS_NOEXEC },
354 { "nosuid", MS_NOSUID },
355 { "nodev", MS_NODEV },
356 { "nodiratime", MS_NODIRATIME },
357 { "ro", MS_RDONLY },
358 { "rw", 0 },
359 { "remount", MS_REMOUNT },
360 { "bind", MS_BIND },
361 { "rec", MS_REC },
362 { "unbindable", MS_UNBINDABLE },
363 { "private", MS_PRIVATE },
364 { "slave", MS_SLAVE },
365 { "shared", MS_SHARED },
366 { "defaults", 0 },
367 { 0, 0 },
368 };
369
370 #define DATA_MNT_POINT "/data"
371
372 /* mount <type> <device> <path> <flags ...> <options> */
do_mount(const std::vector<std::string> & args)373 static int do_mount(const std::vector<std::string>& args) {
374 char tmp[64];
375 const char *source, *target, *system;
376 const char *options = NULL;
377 unsigned flags = 0;
378 std::size_t na = 0;
379 int n, i;
380 int wait = 0;
381
382 for (na = 4; na < args.size(); na++) {
383 for (i = 0; mount_flags[i].name; i++) {
384 if (!args[na].compare(mount_flags[i].name)) {
385 flags |= mount_flags[i].flag;
386 break;
387 }
388 }
389
390 if (!mount_flags[i].name) {
391 if (!args[na].compare("wait"))
392 wait = 1;
393 /* if our last argument isn't a flag, wolf it up as an option string */
394 else if (na + 1 == args.size())
395 options = args[na].c_str();
396 }
397 }
398
399 system = args[1].c_str();
400 source = args[2].c_str();
401 target = args[3].c_str();
402
403 if (!strncmp(source, "mtd@", 4)) {
404 n = mtd_name_to_number(source + 4);
405 if (n < 0) {
406 return -1;
407 }
408
409 snprintf(tmp, sizeof(tmp), "/dev/block/mtdblock%d", n);
410
411 if (wait)
412 wait_for_file(tmp, COMMAND_RETRY_TIMEOUT);
413 if (mount(tmp, target, system, flags, options) < 0) {
414 return -1;
415 }
416
417 goto exit_success;
418 } else if (!strncmp(source, "loop@", 5)) {
419 int mode, loop, fd;
420 struct loop_info info;
421
422 mode = (flags & MS_RDONLY) ? O_RDONLY : O_RDWR;
423 fd = open(source + 5, mode | O_CLOEXEC);
424 if (fd < 0) {
425 return -1;
426 }
427
428 for (n = 0; ; n++) {
429 snprintf(tmp, sizeof(tmp), "/dev/block/loop%d", n);
430 loop = open(tmp, mode | O_CLOEXEC);
431 if (loop < 0) {
432 close(fd);
433 return -1;
434 }
435
436 /* if it is a blank loop device */
437 if (ioctl(loop, LOOP_GET_STATUS, &info) < 0 && errno == ENXIO) {
438 /* if it becomes our loop device */
439 if (ioctl(loop, LOOP_SET_FD, fd) >= 0) {
440 close(fd);
441
442 if (mount(tmp, target, system, flags, options) < 0) {
443 ioctl(loop, LOOP_CLR_FD, 0);
444 close(loop);
445 return -1;
446 }
447
448 close(loop);
449 goto exit_success;
450 }
451 }
452
453 close(loop);
454 }
455
456 close(fd);
457 ERROR("out of loopback devices");
458 return -1;
459 } else {
460 if (wait)
461 wait_for_file(source, COMMAND_RETRY_TIMEOUT);
462 if (mount(source, target, system, flags, options) < 0) {
463 return -1;
464 }
465
466 }
467
468 exit_success:
469 return 0;
470
471 }
472
473 /* Imports .rc files from the specified paths. Default ones are applied if none is given.
474 *
475 * start_index: index of the first path in the args list
476 */
import_late(const std::vector<std::string> & args,size_t start_index)477 static void import_late(const std::vector<std::string>& args, size_t start_index) {
478 Parser& parser = Parser::GetInstance();
479 if (args.size() <= start_index) {
480 // Use the default set if no path is given
481 static const std::vector<std::string> init_directories = {
482 "/system/etc/init",
483 "/vendor/etc/init",
484 "/odm/etc/init"
485 };
486
487 for (const auto& dir : init_directories) {
488 parser.ParseConfig(dir);
489 }
490 } else {
491 for (size_t i = start_index; i < args.size(); ++i) {
492 parser.ParseConfig(args[i]);
493 }
494 }
495 }
496
497 /* mount_all <fstab> [ <path> ]*
498 *
499 * This function might request a reboot, in which case it will
500 * not return.
501 */
do_mount_all(const std::vector<std::string> & args)502 static int do_mount_all(const std::vector<std::string>& args) {
503 pid_t pid;
504 int ret = -1;
505 int child_ret = -1;
506 int status;
507 struct fstab *fstab;
508
509 const char* fstabfile = args[1].c_str();
510 /*
511 * Call fs_mgr_mount_all() to mount all filesystems. We fork(2) and
512 * do the call in the child to provide protection to the main init
513 * process if anything goes wrong (crash or memory leak), and wait for
514 * the child to finish in the parent.
515 */
516 pid = fork();
517 if (pid > 0) {
518 /* Parent. Wait for the child to return */
519 int wp_ret = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0));
520 if (wp_ret < 0) {
521 /* Unexpected error code. We will continue anyway. */
522 NOTICE("waitpid failed rc=%d: %s\n", wp_ret, strerror(errno));
523 }
524
525 if (WIFEXITED(status)) {
526 ret = WEXITSTATUS(status);
527 } else {
528 ret = -1;
529 }
530 } else if (pid == 0) {
531 /* child, call fs_mgr_mount_all() */
532 klog_set_level(6); /* So we can see what fs_mgr_mount_all() does */
533 fstab = fs_mgr_read_fstab(fstabfile);
534 child_ret = fs_mgr_mount_all(fstab);
535 fs_mgr_free_fstab(fstab);
536 if (child_ret == -1) {
537 ERROR("fs_mgr_mount_all returned an error\n");
538 }
539 _exit(child_ret);
540 } else {
541 /* fork failed, return an error */
542 return -1;
543 }
544
545 /* Paths of .rc files are specified at the 2nd argument and beyond */
546 import_late(args, 2);
547
548 if (ret == FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION) {
549 ActionManager::GetInstance().QueueEventTrigger("encrypt");
550 } else if (ret == FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED) {
551 property_set("ro.crypto.state", "encrypted");
552 property_set("ro.crypto.type", "block");
553 ActionManager::GetInstance().QueueEventTrigger("defaultcrypto");
554 } else if (ret == FS_MGR_MNTALL_DEV_NOT_ENCRYPTED) {
555 property_set("ro.crypto.state", "unencrypted");
556 ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
557 } else if (ret == FS_MGR_MNTALL_DEV_NOT_ENCRYPTABLE) {
558 property_set("ro.crypto.state", "unsupported");
559 ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
560 } else if (ret == FS_MGR_MNTALL_DEV_NEEDS_RECOVERY) {
561 /* Setup a wipe via recovery, and reboot into recovery */
562 ERROR("fs_mgr_mount_all suggested recovery, so wiping data via recovery.\n");
563 ret = wipe_data_via_recovery("wipe_data_via_recovery");
564 /* If reboot worked, there is no return. */
565 } else if (ret == FS_MGR_MNTALL_DEV_FILE_ENCRYPTED) {
566 if (e4crypt_install_keyring()) {
567 return -1;
568 }
569 property_set("ro.crypto.state", "encrypted");
570 property_set("ro.crypto.type", "file");
571
572 // Although encrypted, we have device key, so we do not need to
573 // do anything different from the nonencrypted case.
574 ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
575 } else if (ret > 0) {
576 ERROR("fs_mgr_mount_all returned unexpected error %d\n", ret);
577 }
578 /* else ... < 0: error */
579
580 return ret;
581 }
582
do_swapon_all(const std::vector<std::string> & args)583 static int do_swapon_all(const std::vector<std::string>& args) {
584 struct fstab *fstab;
585 int ret;
586
587 fstab = fs_mgr_read_fstab(args[1].c_str());
588 ret = fs_mgr_swapon_all(fstab);
589 fs_mgr_free_fstab(fstab);
590
591 return ret;
592 }
593
do_setprop(const std::vector<std::string> & args)594 static int do_setprop(const std::vector<std::string>& args) {
595 const char* name = args[1].c_str();
596 const char* value = args[2].c_str();
597 property_set(name, value);
598 return 0;
599 }
600
do_setrlimit(const std::vector<std::string> & args)601 static int do_setrlimit(const std::vector<std::string>& args) {
602 struct rlimit limit;
603 int resource;
604 resource = std::stoi(args[1]);
605 limit.rlim_cur = std::stoi(args[2]);
606 limit.rlim_max = std::stoi(args[3]);
607 return setrlimit(resource, &limit);
608 }
609
do_start(const std::vector<std::string> & args)610 static int do_start(const std::vector<std::string>& args) {
611 Service* svc = ServiceManager::GetInstance().FindServiceByName(args[1]);
612 if (!svc) {
613 ERROR("do_start: Service %s not found\n", args[1].c_str());
614 return -1;
615 }
616 if (!svc->Start())
617 return -1;
618 return 0;
619 }
620
do_stop(const std::vector<std::string> & args)621 static int do_stop(const std::vector<std::string>& args) {
622 Service* svc = ServiceManager::GetInstance().FindServiceByName(args[1]);
623 if (!svc) {
624 ERROR("do_stop: Service %s not found\n", args[1].c_str());
625 return -1;
626 }
627 svc->Stop();
628 return 0;
629 }
630
do_restart(const std::vector<std::string> & args)631 static int do_restart(const std::vector<std::string>& args) {
632 Service* svc = ServiceManager::GetInstance().FindServiceByName(args[1]);
633 if (!svc) {
634 ERROR("do_restart: Service %s not found\n", args[1].c_str());
635 return -1;
636 }
637 svc->Restart();
638 return 0;
639 }
640
do_powerctl(const std::vector<std::string> & args)641 static int do_powerctl(const std::vector<std::string>& args) {
642 const char* command = args[1].c_str();
643 int len = 0;
644 unsigned int cmd = 0;
645 const char *reboot_target = "";
646 void (*callback_on_ro_remount)(const struct mntent*) = NULL;
647
648 if (strncmp(command, "shutdown", 8) == 0) {
649 cmd = ANDROID_RB_POWEROFF;
650 len = 8;
651 } else if (strncmp(command, "reboot", 6) == 0) {
652 cmd = ANDROID_RB_RESTART2;
653 len = 6;
654 } else {
655 ERROR("powerctl: unrecognized command '%s'\n", command);
656 return -EINVAL;
657 }
658
659 if (command[len] == ',') {
660 if (cmd == ANDROID_RB_POWEROFF &&
661 !strcmp(&command[len + 1], "userrequested")) {
662 // The shutdown reason is PowerManager.SHUTDOWN_USER_REQUESTED.
663 // Run fsck once the file system is remounted in read-only mode.
664 callback_on_ro_remount = unmount_and_fsck;
665 } else if (cmd == ANDROID_RB_RESTART2) {
666 reboot_target = &command[len + 1];
667 }
668 } else if (command[len] != '\0') {
669 ERROR("powerctl: unrecognized reboot target '%s'\n", &command[len]);
670 return -EINVAL;
671 }
672
673 std::string timeout = property_get("ro.build.shutdown_timeout");
674 unsigned int delay = 0;
675
676 if (android::base::ParseUint(timeout.c_str(), &delay) && delay > 0) {
677 Timer t;
678 // Ask all services to terminate.
679 ServiceManager::GetInstance().ForEachService(
680 [] (Service* s) { s->Terminate(); });
681
682 while (t.duration() < delay) {
683 ServiceManager::GetInstance().ReapAnyOutstandingChildren();
684
685 int service_count = 0;
686 ServiceManager::GetInstance().ForEachService(
687 [&service_count] (Service* s) {
688 // Count the number of services running.
689 // Exclude the console as it will ignore the SIGTERM signal
690 // and not exit.
691 // Note: SVC_CONSOLE actually means "requires console" but
692 // it is only used by the shell.
693 if (s->pid() != 0 && (s->flags() & SVC_CONSOLE) == 0) {
694 service_count++;
695 }
696 });
697
698 if (service_count == 0) {
699 // All terminable services terminated. We can exit early.
700 break;
701 }
702
703 // Wait a bit before recounting the number or running services.
704 usleep(kTerminateServiceDelayMicroSeconds);
705 }
706 NOTICE("Terminating running services took %.02f seconds", t.duration());
707 }
708
709 return android_reboot_with_callback(cmd, 0, reboot_target,
710 callback_on_ro_remount);
711 }
712
do_trigger(const std::vector<std::string> & args)713 static int do_trigger(const std::vector<std::string>& args) {
714 ActionManager::GetInstance().QueueEventTrigger(args[1]);
715 return 0;
716 }
717
do_symlink(const std::vector<std::string> & args)718 static int do_symlink(const std::vector<std::string>& args) {
719 return symlink(args[1].c_str(), args[2].c_str());
720 }
721
do_rm(const std::vector<std::string> & args)722 static int do_rm(const std::vector<std::string>& args) {
723 return unlink(args[1].c_str());
724 }
725
do_rmdir(const std::vector<std::string> & args)726 static int do_rmdir(const std::vector<std::string>& args) {
727 return rmdir(args[1].c_str());
728 }
729
do_sysclktz(const std::vector<std::string> & args)730 static int do_sysclktz(const std::vector<std::string>& args) {
731 struct timezone tz;
732
733 memset(&tz, 0, sizeof(tz));
734 tz.tz_minuteswest = std::stoi(args[1]);
735 if (settimeofday(NULL, &tz))
736 return -1;
737 return 0;
738 }
739
do_verity_load_state(const std::vector<std::string> & args)740 static int do_verity_load_state(const std::vector<std::string>& args) {
741 int mode = -1;
742 int rc = fs_mgr_load_verity_state(&mode);
743 if (rc == 0 && mode != VERITY_MODE_DEFAULT) {
744 ActionManager::GetInstance().QueueEventTrigger("verity-logging");
745 }
746 return rc;
747 }
748
verity_update_property(fstab_rec * fstab,const char * mount_point,int mode,int status)749 static void verity_update_property(fstab_rec *fstab, const char *mount_point,
750 int mode, int status) {
751 property_set(android::base::StringPrintf("partition.%s.verified", mount_point).c_str(),
752 android::base::StringPrintf("%d", mode).c_str());
753 }
754
do_verity_update_state(const std::vector<std::string> & args)755 static int do_verity_update_state(const std::vector<std::string>& args) {
756 return fs_mgr_update_verity_state(verity_update_property);
757 }
758
do_write(const std::vector<std::string> & args)759 static int do_write(const std::vector<std::string>& args) {
760 const char* path = args[1].c_str();
761 const char* value = args[2].c_str();
762 return write_file(path, value);
763 }
764
do_copy(const std::vector<std::string> & args)765 static int do_copy(const std::vector<std::string>& args) {
766 char *buffer = NULL;
767 int rc = 0;
768 int fd1 = -1, fd2 = -1;
769 struct stat info;
770 int brtw, brtr;
771 char *p;
772
773 if (stat(args[1].c_str(), &info) < 0)
774 return -1;
775
776 if ((fd1 = open(args[1].c_str(), O_RDONLY|O_CLOEXEC)) < 0)
777 goto out_err;
778
779 if ((fd2 = open(args[2].c_str(), O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0660)) < 0)
780 goto out_err;
781
782 if (!(buffer = (char*) malloc(info.st_size)))
783 goto out_err;
784
785 p = buffer;
786 brtr = info.st_size;
787 while(brtr) {
788 rc = read(fd1, p, brtr);
789 if (rc < 0)
790 goto out_err;
791 if (rc == 0)
792 break;
793 p += rc;
794 brtr -= rc;
795 }
796
797 p = buffer;
798 brtw = info.st_size;
799 while(brtw) {
800 rc = write(fd2, p, brtw);
801 if (rc < 0)
802 goto out_err;
803 if (rc == 0)
804 break;
805 p += rc;
806 brtw -= rc;
807 }
808
809 rc = 0;
810 goto out;
811 out_err:
812 rc = -1;
813 out:
814 if (buffer)
815 free(buffer);
816 if (fd1 >= 0)
817 close(fd1);
818 if (fd2 >= 0)
819 close(fd2);
820 return rc;
821 }
822
do_chown(const std::vector<std::string> & args)823 static int do_chown(const std::vector<std::string>& args) {
824 /* GID is optional. */
825 if (args.size() == 3) {
826 if (lchown(args[2].c_str(), decode_uid(args[1].c_str()), -1) == -1)
827 return -errno;
828 } else if (args.size() == 4) {
829 if (lchown(args[3].c_str(), decode_uid(args[1].c_str()),
830 decode_uid(args[2].c_str())) == -1)
831 return -errno;
832 } else {
833 return -1;
834 }
835 return 0;
836 }
837
get_mode(const char * s)838 static mode_t get_mode(const char *s) {
839 mode_t mode = 0;
840 while (*s) {
841 if (*s >= '0' && *s <= '7') {
842 mode = (mode<<3) | (*s-'0');
843 } else {
844 return -1;
845 }
846 s++;
847 }
848 return mode;
849 }
850
do_chmod(const std::vector<std::string> & args)851 static int do_chmod(const std::vector<std::string>& args) {
852 mode_t mode = get_mode(args[1].c_str());
853 if (fchmodat(AT_FDCWD, args[2].c_str(), mode, AT_SYMLINK_NOFOLLOW) < 0) {
854 return -errno;
855 }
856 return 0;
857 }
858
do_restorecon(const std::vector<std::string> & args)859 static int do_restorecon(const std::vector<std::string>& args) {
860 int ret = 0;
861
862 for (auto it = std::next(args.begin()); it != args.end(); ++it) {
863 if (restorecon(it->c_str()) < 0)
864 ret = -errno;
865 }
866 return ret;
867 }
868
do_restorecon_recursive(const std::vector<std::string> & args)869 static int do_restorecon_recursive(const std::vector<std::string>& args) {
870 int ret = 0;
871
872 for (auto it = std::next(args.begin()); it != args.end(); ++it) {
873 if (restorecon_recursive(it->c_str()) < 0)
874 ret = -errno;
875 }
876 return ret;
877 }
878
do_loglevel(const std::vector<std::string> & args)879 static int do_loglevel(const std::vector<std::string>& args) {
880 int log_level = std::stoi(args[1]);
881 if (log_level < KLOG_ERROR_LEVEL || log_level > KLOG_DEBUG_LEVEL) {
882 ERROR("loglevel: invalid log level'%d'\n", log_level);
883 return -EINVAL;
884 }
885 klog_set_level(log_level);
886 return 0;
887 }
888
do_load_persist_props(const std::vector<std::string> & args)889 static int do_load_persist_props(const std::vector<std::string>& args) {
890 load_persist_props();
891 return 0;
892 }
893
do_load_system_props(const std::vector<std::string> & args)894 static int do_load_system_props(const std::vector<std::string>& args) {
895 load_system_props();
896 return 0;
897 }
898
do_wait(const std::vector<std::string> & args)899 static int do_wait(const std::vector<std::string>& args) {
900 if (args.size() == 2) {
901 return wait_for_file(args[1].c_str(), COMMAND_RETRY_TIMEOUT);
902 } else if (args.size() == 3) {
903 return wait_for_file(args[1].c_str(), std::stoi(args[2]));
904 } else
905 return -1;
906 }
907
908 /*
909 * Callback to make a directory from the ext4 code
910 */
do_installkeys_ensure_dir_exists(const char * dir)911 static int do_installkeys_ensure_dir_exists(const char* dir) {
912 if (make_dir(dir, 0700) && errno != EEXIST) {
913 return -1;
914 }
915
916 return 0;
917 }
918
is_file_crypto()919 static bool is_file_crypto() {
920 std::string value = property_get("ro.crypto.type");
921 return value == "file";
922 }
923
do_installkey(const std::vector<std::string> & args)924 static int do_installkey(const std::vector<std::string>& args) {
925 if (!is_file_crypto()) {
926 return 0;
927 }
928 return e4crypt_create_device_key(args[1].c_str(),
929 do_installkeys_ensure_dir_exists);
930 }
931
do_init_user0(const std::vector<std::string> & args)932 static int do_init_user0(const std::vector<std::string>& args) {
933 return e4crypt_do_init_user0();
934 }
935
map() const936 BuiltinFunctionMap::Map& BuiltinFunctionMap::map() const {
937 constexpr std::size_t kMax = std::numeric_limits<std::size_t>::max();
938 static const Map builtin_functions = {
939 {"bootchart_init", {0, 0, do_bootchart_init}},
940 {"chmod", {2, 2, do_chmod}},
941 {"chown", {2, 3, do_chown}},
942 {"class_reset", {1, 1, do_class_reset}},
943 {"class_start", {1, 1, do_class_start}},
944 {"class_stop", {1, 1, do_class_stop}},
945 {"copy", {2, 2, do_copy}},
946 {"domainname", {1, 1, do_domainname}},
947 {"enable", {1, 1, do_enable}},
948 {"exec", {1, kMax, do_exec}},
949 {"export", {2, 2, do_export}},
950 {"hostname", {1, 1, do_hostname}},
951 {"ifup", {1, 1, do_ifup}},
952 {"init_user0", {0, 0, do_init_user0}},
953 {"insmod", {1, kMax, do_insmod}},
954 {"installkey", {1, 1, do_installkey}},
955 {"load_persist_props", {0, 0, do_load_persist_props}},
956 {"load_system_props", {0, 0, do_load_system_props}},
957 {"loglevel", {1, 1, do_loglevel}},
958 {"mkdir", {1, 4, do_mkdir}},
959 {"mount_all", {1, kMax, do_mount_all}},
960 {"mount", {3, kMax, do_mount}},
961 {"powerctl", {1, 1, do_powerctl}},
962 {"restart", {1, 1, do_restart}},
963 {"restorecon", {1, kMax, do_restorecon}},
964 {"restorecon_recursive", {1, kMax, do_restorecon_recursive}},
965 {"rm", {1, 1, do_rm}},
966 {"rmdir", {1, 1, do_rmdir}},
967 {"setprop", {2, 2, do_setprop}},
968 {"setrlimit", {3, 3, do_setrlimit}},
969 {"start", {1, 1, do_start}},
970 {"stop", {1, 1, do_stop}},
971 {"swapon_all", {1, 1, do_swapon_all}},
972 {"symlink", {2, 2, do_symlink}},
973 {"sysclktz", {1, 1, do_sysclktz}},
974 {"trigger", {1, 1, do_trigger}},
975 {"verity_load_state", {0, 0, do_verity_load_state}},
976 {"verity_update_state", {0, 0, do_verity_update_state}},
977 {"wait", {1, 2, do_wait}},
978 {"write", {2, 2, do_write}},
979 };
980 return builtin_functions;
981 }
982