1/* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define TRACE_TAG ADB 18 19#include "sysdeps.h" 20 21#include <signal.h> 22#include <stdio.h> 23#include <stdlib.h> 24#include <unistd.h> 25 26#include <android-base/errors.h> 27#include <android-base/file.h> 28#include <android-base/logging.h> 29#include <android-base/stringprintf.h> 30 31#include "adb.h" 32#include "adb_auth.h" 33#include "adb_listeners.h" 34#include "adb_utils.h" 35#include "commandline.h" 36#include "transport.h" 37 38static std::string GetLogFilePath() { 39#if defined(_WIN32) 40 const char log_name[] = "adb.log"; 41 WCHAR temp_path[MAX_PATH]; 42 43 // https://msdn.microsoft.com/en-us/library/windows/desktop/aa364992%28v=vs.85%29.aspx 44 DWORD nchars = GetTempPathW(arraysize(temp_path), temp_path); 45 if (nchars >= arraysize(temp_path) || nchars == 0) { 46 // If string truncation or some other error. 47 fatal("cannot retrieve temporary file path: %s\n", 48 android::base::SystemErrorCodeToString(GetLastError()).c_str()); 49 } 50 51 std::string temp_path_utf8; 52 if (!android::base::WideToUTF8(temp_path, &temp_path_utf8)) { 53 fatal_errno("cannot convert temporary file path from UTF-16 to UTF-8"); 54 } 55 56 return temp_path_utf8 + log_name; 57#else 58 const char* tmp_dir = getenv("TMPDIR"); 59 if (tmp_dir == nullptr) tmp_dir = "/tmp"; 60 return android::base::StringPrintf("%s/adb.%u.log", tmp_dir, getuid()); 61#endif 62} 63 64static void setup_daemon_logging(void) { 65 const std::string log_file_path(GetLogFilePath()); 66 int fd = unix_open(log_file_path.c_str(), O_WRONLY | O_CREAT | O_APPEND, 0640); 67 if (fd == -1) { 68 fatal("cannot open '%s': %s", log_file_path.c_str(), strerror(errno)); 69 } 70 if (dup2(fd, STDOUT_FILENO) == -1) { 71 fatal("cannot redirect stdout: %s", strerror(errno)); 72 } 73 if (dup2(fd, STDERR_FILENO) == -1) { 74 fatal("cannot redirect stderr: %s", strerror(errno)); 75 } 76 unix_close(fd); 77 78 fprintf(stderr, "--- adb starting (pid %d) ---\n", getpid()); 79 LOG(INFO) << adb_version(); 80} 81 82#if defined(_WIN32) 83static BOOL WINAPI ctrlc_handler(DWORD type) { 84 // TODO: Consider trying to kill a starting up adb server (if we're in 85 // launch_server) by calling GenerateConsoleCtrlEvent(). 86 exit(STATUS_CONTROL_C_EXIT); 87 return TRUE; 88} 89#endif 90 91int adb_server_main(int is_daemon, int server_port, int ack_reply_fd) { 92#if defined(_WIN32) 93 // adb start-server starts us up with stdout and stderr hooked up to 94 // anonymous pipes. When the C Runtime sees this, it makes stderr and 95 // stdout buffered, but to improve the chance that error output is seen, 96 // unbuffer stdout and stderr just like if we were run at the console. 97 // This also keeps stderr unbuffered when it is redirected to adb.log. 98 if (is_daemon) { 99 if (setvbuf(stdout, NULL, _IONBF, 0) == -1) { 100 fatal("cannot make stdout unbuffered: %s", strerror(errno)); 101 } 102 if (setvbuf(stderr, NULL, _IONBF, 0) == -1) { 103 fatal("cannot make stderr unbuffered: %s", strerror(errno)); 104 } 105 } 106 107 SetConsoleCtrlHandler(ctrlc_handler, TRUE); 108#endif 109 110 init_transport_registration(); 111 112 usb_init(); 113 local_init(DEFAULT_ADB_LOCAL_TRANSPORT_PORT); 114 adb_auth_init(); 115 116 std::string error; 117 std::string local_name = android::base::StringPrintf("tcp:%d", server_port); 118 if (install_listener(local_name, "*smartsocket*", nullptr, 0, &error)) { 119 fatal("could not install *smartsocket* listener: %s", error.c_str()); 120 } 121 122 // Inform our parent that we are up and running. 123 if (is_daemon) { 124 close_stdin(); 125 setup_daemon_logging(); 126 127#if !defined(_WIN32) 128 // Start a new session for the daemon. Do this here instead of after the fork so 129 // that a ctrl-c between the "starting server" and "done starting server" messages 130 // gets a chance to terminate the server. 131 if (setsid() == -1) { 132 fatal("setsid() failed: %s", strerror(errno)); 133 } 134#endif 135 136 // Any error output written to stderr now goes to adb.log. We could 137 // keep around a copy of the stderr fd and use that to write any errors 138 // encountered by the following code, but that is probably overkill. 139#if defined(_WIN32) 140 const HANDLE ack_reply_handle = cast_int_to_handle(ack_reply_fd); 141 const CHAR ack[] = "OK\n"; 142 const DWORD bytes_to_write = arraysize(ack) - 1; 143 DWORD written = 0; 144 if (!WriteFile(ack_reply_handle, ack, bytes_to_write, &written, NULL)) { 145 fatal("adb: cannot write ACK to handle 0x%p: %s", ack_reply_handle, 146 android::base::SystemErrorCodeToString(GetLastError()).c_str()); 147 } 148 if (written != bytes_to_write) { 149 fatal("adb: cannot write %lu bytes of ACK: only wrote %lu bytes", 150 bytes_to_write, written); 151 } 152 CloseHandle(ack_reply_handle); 153#else 154 // TODO(danalbert): Can't use SendOkay because we're sending "OK\n", not 155 // "OKAY". 156 if (!android::base::WriteStringToFd("OK\n", ack_reply_fd)) { 157 fatal_errno("error writing ACK to fd %d", ack_reply_fd); 158 } 159 unix_close(ack_reply_fd); 160#endif 161 } 162 163 D("Event loop starting"); 164 fdevent_loop(); 165 166 return 0; 167} 168 169int main(int argc, char** argv) { 170 adb_sysdeps_init(); 171 adb_trace_init(argv); 172 return adb_commandline(argc - 1, const_cast<const char**>(argv + 1)); 173} 174