client/main.cpp - LeafOS-Project/android_packages_modules_adb - Gitiles

 /*
  * Copyright (C) 2015 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #define TRACE_TAG ADB

 #include "sysdeps.h"

 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>

 #include <thread>

 #include <android-base/errors.h>
 #include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/stringprintf.h>

 #include "adb.h"
 #include "adb_auth.h"
 #include "adb_client.h"
 #include "adb_listeners.h"
 #include "adb_mdns.h"
 #include "adb_utils.h"
 #include "adb_wifi.h"
 #include "client/usb.h"
 #include "commandline.h"
 #include "sysdeps/chrono.h"
 #include "transport.h"

 const char** __adb_argv;
 const char** __adb_envp;

 static void setup_daemon_logging() {
     const std::string log_file_path(GetLogFilePath());
     int fd = unix_open(log_file_path, O_WRONLY | O_CREAT | O_APPEND, 0640);
     if (fd == -1) {
         PLOG(FATAL) << "cannot open " << log_file_path;
     }
     if (dup2(fd, STDOUT_FILENO) == -1) {
         PLOG(FATAL) << "cannot redirect stdout";
     }
     if (dup2(fd, STDERR_FILENO) == -1) {
         PLOG(FATAL) << "cannot redirect stderr";
     }
     unix_close(fd);

     fprintf(stderr, "--- adb starting (pid %d) ---\n", getpid());
     LOG(INFO) << adb_version();
 }

 void adb_server_cleanup() {
     // Upon exit, we want to clean up in the following order:
     //   1. close_smartsockets, so that we don't get any new clients
     //   2. kick_all_transports, to avoid writing only part of a packet to a transport.
     //   3. usb_cleanup, to tear down the USB stack.
     //   4. mdns_cleanup, to tear down mdns stack.
     close_smartsockets();
     kick_all_transports();
     usb_cleanup();
     mdns_cleanup();
 }

 static void intentionally_leak() {
     void* p = ::operator new(1);
     // The analyzer is upset about this leaking. NOLINTNEXTLINE
     LOG(INFO) << "leaking pointer " << p;
 }

 // one_device: if null, server owns all devices, else server owns only
 //     device where atransport::MatchesTarget(one_device) is true.
 int adb_server_main(int is_daemon, const std::string& socket_spec, const char* one_device,
                     int ack_reply_fd) {
 #if defined(_WIN32)
     // adb start-server starts us up with stdout and stderr hooked up to
     // anonymous pipes. When the C Runtime sees this, it makes stderr and
     // stdout buffered, but to improve the chance that error output is seen,
     // unbuffer stdout and stderr just like if we were run at the console.
     // This also keeps stderr unbuffered when it is redirected to adb.log.
     if (is_daemon) {
         if (setvbuf(stdout, nullptr, _IONBF, 0) == -1) {
             PLOG(FATAL) << "cannot make stdout unbuffered";
         }
         if (setvbuf(stderr, nullptr, _IONBF, 0) == -1) {
             PLOG(FATAL) << "cannot make stderr unbuffered";
         }
     }

     // TODO: On Ctrl-C, consider trying to kill a starting up adb server (if we're in
     // launch_server) by calling GenerateConsoleCtrlEvent().

     // On Windows, SIGBREAK is when Ctrl-Break is pressed or the console window is closed. It should
     // act like Ctrl-C.
     signal(SIGBREAK, [](int) { raise(SIGINT); });
 #endif
     signal(SIGINT, [](int) { fdevent_run_on_looper([]() { exit(0); }); });

     if (one_device) {
         transport_set_one_device(one_device);
     }

     const char* reject_kill_server = getenv("ADB_REJECT_KILL_SERVER");
     if (reject_kill_server && strcmp(reject_kill_server, "1") == 0) {
         adb_set_reject_kill_server(true);
     }

     const char* leak = getenv("ADB_LEAK");
     if (leak && strcmp(leak, "1") == 0) {
         intentionally_leak();
     }

     if (is_daemon) {
         close_stdin();
         setup_daemon_logging();
     }

     atexit(adb_server_cleanup);

     init_reconnect_handler();

     if (!getenv("ADB_MDNS") || strcmp(getenv("ADB_MDNS"), "0") != 0) {
         init_mdns_transport_discovery();
     }

     if (!getenv("ADB_USB") || strcmp(getenv("ADB_USB"), "0") != 0) {
         if (should_use_libusb()) {
             libusb::usb_init();
         } else {
             usb_init();
         }
     } else {
         adb_notify_device_scan_complete();
     }

     if (!getenv("ADB_EMU") || strcmp(getenv("ADB_EMU"), "0") != 0) {
         local_init(android::base::StringPrintf("tcp:%d", DEFAULT_ADB_LOCAL_TRANSPORT_PORT));
     }

     std::string error;

     auto start = std::chrono::steady_clock::now();

     // If we told a previous adb server to quit because of version mismatch, we can get to this
     // point before it's finished exiting. Retry for a while to give it some time. Don't actually
     // accept any connections until adb_wait_for_device_initialization finishes below.
     while (install_listener(socket_spec, kSmartSocketConnectTo, nullptr, INSTALL_LISTENER_DISABLED,
                             nullptr, &error) != INSTALL_STATUS_OK) {
         if (std::chrono::steady_clock::now() - start > 0.5s) {
             LOG(FATAL) << "could not install *smartsocket* listener: " << error;
         }

         std::this_thread::sleep_for(100ms);
     }

     adb_auth_init();

     if (is_daemon) {
 #if !defined(_WIN32)
         // Start a new session for the daemon. Do this here instead of after the fork so
         // that a ctrl-c between the "starting server" and "done starting server" messages
         // gets a chance to terminate the server.
         // setsid will fail with EPERM if it's already been a lead process of new session.
         // Ignore such error.
         if (setsid() == -1 && errno != EPERM) {
             PLOG(FATAL) << "setsid() failed";
         }
 #endif
     }

     // Wait for the USB scan to complete before notifying the parent that we're up.
     // We need to perform this in a thread, because we would otherwise block the event loop.
     std::thread notify_thread([ack_reply_fd]() {
         adb_wait_for_device_initialization();

         if (ack_reply_fd >= 0) {
             // Any error output written to stderr now goes to adb.log. We could
             // keep around a copy of the stderr fd and use that to write any errors
             // encountered by the following code, but that is probably overkill.
 #if defined(_WIN32)
             const HANDLE ack_reply_handle = cast_int_to_handle(ack_reply_fd);
             const CHAR ack[] = "OK\n";
             const DWORD bytes_to_write = arraysize(ack) - 1;
             DWORD written = 0;
             if (!WriteFile(ack_reply_handle, ack, bytes_to_write, &written, NULL)) {
                 LOG(FATAL) << "cannot write ACK to handle " << ack_reply_handle
                            << android::base::SystemErrorCodeToString(GetLastError());
             }
             if (written != bytes_to_write) {
                 LOG(FATAL) << "cannot write " << bytes_to_write << " bytes of ACK: only wrote "
                            << written << " bytes";
             }
             CloseHandle(ack_reply_handle);
 #else
             // TODO(danalbert): Can't use SendOkay because we're sending "OK\n", not
             // "OKAY".
             if (!android::base::WriteStringToFd("OK\n", ack_reply_fd)) {
                 PLOG(FATAL) << "error writing ACK to fd " << ack_reply_fd;
             }
             unix_close(ack_reply_fd);
 #endif
         }
         // We don't accept() client connections until this point: this way, clients
         // can't see wonky state early in startup even if they're connecting directly
         // to the server instead of going through the adb program.
         fdevent_run_on_looper([] { enable_server_sockets(); });
     });
     notify_thread.detach();

 #if defined(__linux__)
     // Write our location to .android/adb.$PORT, so that older clients can exec us.
     std::string path;
     if (!android::base::Readlink("/proc/self/exe", &path)) {
         PLOG(ERROR) << "failed to readlink /proc/self/exe";
     }

     std::optional<std::string> server_executable_path = adb_get_server_executable_path();
     if (server_executable_path) {
       if (!android::base::WriteStringToFile(path, *server_executable_path)) {
           PLOG(ERROR) << "failed to write server path to " << path;
       }
     }
 #endif

     D("Event loop starting");
     fdevent_loop();
     return 0;
 }

 int main(int argc, char* argv[], char* envp[]) {
     __adb_argv = const_cast<const char**>(argv);
     __adb_envp = const_cast<const char**>(envp);
     adb_trace_init(argv);
     return adb_commandline(argc - 1, const_cast<const char**>(argv + 1));
 }
	/*
	* Copyright (C) 2015 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#define TRACE_TAG ADB

	#include "sysdeps.h"

	#include <signal.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <unistd.h>

	#include <thread>

	#include <android-base/errors.h>
	#include <android-base/file.h>
	#include <android-base/logging.h>
	#include <android-base/stringprintf.h>

	#include "adb.h"
	#include "adb_auth.h"
	#include "adb_client.h"
	#include "adb_listeners.h"
	#include "adb_mdns.h"
	#include "adb_utils.h"
	#include "adb_wifi.h"
	#include "client/usb.h"
	#include "commandline.h"
	#include "sysdeps/chrono.h"
	#include "transport.h"

	const char** __adb_argv;
	const char** __adb_envp;

	static void setup_daemon_logging() {
	const std::string log_file_path(GetLogFilePath());
	int fd = unix_open(log_file_path, O_WRONLY \| O_CREAT \| O_APPEND, 0640);
	if (fd == -1) {
	PLOG(FATAL) << "cannot open " << log_file_path;
	}
	if (dup2(fd, STDOUT_FILENO) == -1) {
	PLOG(FATAL) << "cannot redirect stdout";
	}
	if (dup2(fd, STDERR_FILENO) == -1) {
	PLOG(FATAL) << "cannot redirect stderr";
	}
	unix_close(fd);

	fprintf(stderr, "--- adb starting (pid %d) ---\n", getpid());
	LOG(INFO) << adb_version();
	}

	void adb_server_cleanup() {
	// Upon exit, we want to clean up in the following order:
	// 1. close_smartsockets, so that we don't get any new clients
	// 2. kick_all_transports, to avoid writing only part of a packet to a transport.
	// 3. usb_cleanup, to tear down the USB stack.
	// 4. mdns_cleanup, to tear down mdns stack.
	close_smartsockets();
	kick_all_transports();
	usb_cleanup();
	mdns_cleanup();
	}

	static void intentionally_leak() {
	void* p = ::operator new(1);
	// The analyzer is upset about this leaking. NOLINTNEXTLINE
	LOG(INFO) << "leaking pointer " << p;
	}

	// one_device: if null, server owns all devices, else server owns only
	// device where atransport::MatchesTarget(one_device) is true.
	int adb_server_main(int is_daemon, const std::string& socket_spec, const char* one_device,
	int ack_reply_fd) {
	#if defined(_WIN32)
	// adb start-server starts us up with stdout and stderr hooked up to
	// anonymous pipes. When the C Runtime sees this, it makes stderr and
	// stdout buffered, but to improve the chance that error output is seen,
	// unbuffer stdout and stderr just like if we were run at the console.
	// This also keeps stderr unbuffered when it is redirected to adb.log.
	if (is_daemon) {
	if (setvbuf(stdout, nullptr, _IONBF, 0) == -1) {
	PLOG(FATAL) << "cannot make stdout unbuffered";
	}
	if (setvbuf(stderr, nullptr, _IONBF, 0) == -1) {
	PLOG(FATAL) << "cannot make stderr unbuffered";
	}
	}

	// TODO: On Ctrl-C, consider trying to kill a starting up adb server (if we're in
	// launch_server) by calling GenerateConsoleCtrlEvent().

	// On Windows, SIGBREAK is when Ctrl-Break is pressed or the console window is closed. It should
	// act like Ctrl-C.
	signal(SIGBREAK, [](int) { raise(SIGINT); });
	#endif
	signal(SIGINT, [](int) { fdevent_run_on_looper([]() { exit(0); }); });

	if (one_device) {
	transport_set_one_device(one_device);
	}

	const char* reject_kill_server = getenv("ADB_REJECT_KILL_SERVER");
	if (reject_kill_server && strcmp(reject_kill_server, "1") == 0) {
	adb_set_reject_kill_server(true);
	}

	const char* leak = getenv("ADB_LEAK");
	if (leak && strcmp(leak, "1") == 0) {
	intentionally_leak();
	}

	if (is_daemon) {
	close_stdin();
	setup_daemon_logging();
	}

	atexit(adb_server_cleanup);

	init_reconnect_handler();

	if (!getenv("ADB_MDNS") \|\| strcmp(getenv("ADB_MDNS"), "0") != 0) {
	init_mdns_transport_discovery();
	}

	if (!getenv("ADB_USB") \|\| strcmp(getenv("ADB_USB"), "0") != 0) {
	if (should_use_libusb()) {
	libusb::usb_init();
	} else {
	usb_init();
	}
	} else {
	adb_notify_device_scan_complete();
	}

	if (!getenv("ADB_EMU") \|\| strcmp(getenv("ADB_EMU"), "0") != 0) {
	local_init(android::base::StringPrintf("tcp:%d", DEFAULT_ADB_LOCAL_TRANSPORT_PORT));
	}

	std::string error;

	auto start = std::chrono::steady_clock::now();

	// If we told a previous adb server to quit because of version mismatch, we can get to this
	// point before it's finished exiting. Retry for a while to give it some time. Don't actually
	// accept any connections until adb_wait_for_device_initialization finishes below.
	while (install_listener(socket_spec, kSmartSocketConnectTo, nullptr, INSTALL_LISTENER_DISABLED,
	nullptr, &error) != INSTALL_STATUS_OK) {
	if (std::chrono::steady_clock::now() - start > 0.5s) {
	LOG(FATAL) << "could not install smartsocket listener: " << error;
	}

	std::this_thread::sleep_for(100ms);
	}

	adb_auth_init();

	if (is_daemon) {
	#if !defined(_WIN32)
	// Start a new session for the daemon. Do this here instead of after the fork so
	// that a ctrl-c between the "starting server" and "done starting server" messages
	// gets a chance to terminate the server.
	// setsid will fail with EPERM if it's already been a lead process of new session.
	// Ignore such error.
	if (setsid() == -1 && errno != EPERM) {
	PLOG(FATAL) << "setsid() failed";
	}
	#endif
	}

	// Wait for the USB scan to complete before notifying the parent that we're up.
	// We need to perform this in a thread, because we would otherwise block the event loop.
	std::thread notify_thread([ack_reply_fd]() {
	adb_wait_for_device_initialization();

	if (ack_reply_fd >= 0) {
	// Any error output written to stderr now goes to adb.log. We could
	// keep around a copy of the stderr fd and use that to write any errors
	// encountered by the following code, but that is probably overkill.
	#if defined(_WIN32)
	const HANDLE ack_reply_handle = cast_int_to_handle(ack_reply_fd);
	const CHAR ack[] = "OK\n";
	const DWORD bytes_to_write = arraysize(ack) - 1;
	DWORD written = 0;
	if (!WriteFile(ack_reply_handle, ack, bytes_to_write, &written, NULL)) {
	LOG(FATAL) << "cannot write ACK to handle " << ack_reply_handle
	<< android::base::SystemErrorCodeToString(GetLastError());
	}
	if (written != bytes_to_write) {
	LOG(FATAL) << "cannot write " << bytes_to_write << " bytes of ACK: only wrote "
	<< written << " bytes";
	}
	CloseHandle(ack_reply_handle);
	#else
	// TODO(danalbert): Can't use SendOkay because we're sending "OK\n", not
	// "OKAY".
	if (!android::base::WriteStringToFd("OK\n", ack_reply_fd)) {
	PLOG(FATAL) << "error writing ACK to fd " << ack_reply_fd;
	}
	unix_close(ack_reply_fd);
	#endif
	}
	// We don't accept() client connections until this point: this way, clients
	// can't see wonky state early in startup even if they're connecting directly
	// to the server instead of going through the adb program.
	fdevent_run_on_looper([] { enable_server_sockets(); });
	});
	notify_thread.detach();

	#if defined(__linux__)
	// Write our location to .android/adb.$PORT, so that older clients can exec us.
	std::string path;
	if (!android::base::Readlink("/proc/self/exe", &path)) {
	PLOG(ERROR) << "failed to readlink /proc/self/exe";
	}

	std::optional<std::string> server_executable_path = adb_get_server_executable_path();
	if (server_executable_path) {
	if (!android::base::WriteStringToFile(path, *server_executable_path)) {
	PLOG(ERROR) << "failed to write server path to " << path;
	}
	}
	#endif

	D("Event loop starting");
	fdevent_loop();
	return 0;
	}

	int main(int argc, char* argv[], char* envp[]) {
	__adb_argv = const_cast<const char**>(argv);
	__adb_envp = const_cast<const char**>(envp);
	adb_trace_init(argv);
	return adb_commandline(argc - 1, const_cast<const char**>(argv + 1));
	}