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
GetLogFilePath()38 static 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
setup_daemon_logging(void)64 static 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)
ctrlc_handler(DWORD type)83 static 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
adb_server_main(int is_daemon,int server_port,int ack_reply_fd)91 int 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
main(int argc,char ** argv)169 int 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