summaryrefslogtreecommitdiffstats
blob: 606203cb45a33cfbd6f5bd571fd74c5857dc8347 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
/*
 * 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/quick_exit.h>
#include <android-base/stringprintf.h>

#include "adb.h"
#include "adb_auth.h"
#include "adb_listeners.h"
#include "adb_utils.h"
#include "commandline.h"
#include "sysdeps/chrono.h"
#include "transport.h"

static std::string GetLogFilePath() {
#if defined(_WIN32)
    const char log_name[] = "adb.log";
    WCHAR temp_path[MAX_PATH];

    // https://msdn.microsoft.com/en-us/library/windows/desktop/aa364992%28v=vs.85%29.aspx
    DWORD nchars = GetTempPathW(arraysize(temp_path), temp_path);
    if (nchars >= arraysize(temp_path) || nchars == 0) {
        // If string truncation or some other error.
        fatal("cannot retrieve temporary file path: %s\n",
              android::base::SystemErrorCodeToString(GetLastError()).c_str());
    }

    std::string temp_path_utf8;
    if (!android::base::WideToUTF8(temp_path, &temp_path_utf8)) {
        fatal_errno("cannot convert temporary file path from UTF-16 to UTF-8");
    }

    return temp_path_utf8 + log_name;
#else
    const char* tmp_dir = getenv("TMPDIR");
    if (tmp_dir == nullptr) tmp_dir = "/tmp";
    return android::base::StringPrintf("%s/adb.%u.log", tmp_dir, getuid());
#endif
}

static void setup_daemon_logging(void) {
    const std::string log_file_path(GetLogFilePath());
    int fd = unix_open(log_file_path.c_str(), O_WRONLY | O_CREAT | O_APPEND, 0640);
    if (fd == -1) {
        fatal("cannot open '%s': %s", log_file_path.c_str(), strerror(errno));
    }
    if (dup2(fd, STDOUT_FILENO) == -1) {
        fatal("cannot redirect stdout: %s", strerror(errno));
    }
    if (dup2(fd, STDERR_FILENO) == -1) {
        fatal("cannot redirect stderr: %s", strerror(errno));
    }
    unix_close(fd);

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

#if defined(_WIN32)
static BOOL WINAPI ctrlc_handler(DWORD type) {
    // TODO: Consider trying to kill a starting up adb server (if we're in
    // launch_server) by calling GenerateConsoleCtrlEvent().
    android::base::quick_exit(STATUS_CONTROL_C_EXIT);
    return TRUE;
}
#endif

int adb_server_main(int is_daemon, const std::string& socket_spec, 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, NULL, _IONBF, 0) == -1) {
            fatal("cannot make stdout unbuffered: %s", strerror(errno));
        }
        if (setvbuf(stderr, NULL, _IONBF, 0) == -1) {
            fatal("cannot make stderr unbuffered: %s", strerror(errno));
        }
    }

    SetConsoleCtrlHandler(ctrlc_handler, TRUE);
#else
    signal(SIGINT, [](int) {
        android::base::quick_exit(0);
    });
#endif

    init_transport_registration();

    init_mdns_transport_discovery();

    usb_init();
    local_init(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.
    while (install_listener(socket_spec, "*smartsocket*", nullptr, 0, nullptr, &error) !=
           INSTALL_STATUS_OK) {
        if (std::chrono::steady_clock::now() - start > 0.5s) {
            fatal("could not install *smartsocket* listener: %s", error.c_str());
        }

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

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

    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) {
            fatal("setsid() failed: %s", strerror(errno));
        }
#endif

        // Inform our parent that we are up and running.

        // 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)) {
            fatal("adb: cannot write ACK to handle 0x%p: %s", ack_reply_handle,
                  android::base::SystemErrorCodeToString(GetLastError()).c_str());
        }
        if (written != bytes_to_write) {
            fatal("adb: cannot write %lu bytes of ACK: only wrote %lu bytes",
                  bytes_to_write, written);
        }
        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)) {
            fatal_errno("error writing ACK to fd %d", ack_reply_fd);
        }
        unix_close(ack_reply_fd);
#endif
    }

    D("Event loop starting");
    fdevent_loop();

    return 0;
}

int main(int argc, char** argv) {
    adb_trace_init(argv);
    return adb_commandline(argc - 1, const_cast<const char**>(argv + 1));
}