console.cpp revision 5200c6670f041550c23821fec8e8e49b30ef6d29 
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#include "sysdeps.h"
18
19#include <stdio.h>
20
21#include <base/file.h>
22#include <base/logging.h>
23#include <base/strings.h>
24#include <cutils/sockets.h>
25
26#include "adb.h"
27#include "adb_client.h"
28
29// Return the console port of the currently connected emulator (if any) or -1 if
30// there is no emulator, and -2 if there is more than one.
31static int adb_get_emulator_console_port(const char* serial) {
32    if (serial) {
33        // The user specified a serial number; is it an emulator?
34        int port;
35        return (sscanf(serial, "emulator-%d", &port) == 1) ? port : -1;
36    }
37
38    // No specific device was given, so get the list of connected devices and
39    // search for emulators. If there's one, we'll take it. If there are more
40    // than one, that's an error.
41    std::string devices;
42    std::string error;
43    if (!adb_query("host:devices", &devices, &error)) {
44        fprintf(stderr, "error: no emulator connected: %s\n", error.c_str());
45        return -1;
46    }
47
48    int port;
49    size_t emulator_count = 0;
50    for (const auto& device : android::base::Split(devices, "\n")) {
51        if (sscanf(device.c_str(), "emulator-%d", &port) == 1) {
52            if (++emulator_count > 1) {
53                fprintf(
54                    stderr, "error: more than one emulator detected; use -s\n");
55                return -1;
56            }
57        }
58    }
59
60    if (emulator_count == 0) {
61        fprintf(stderr, "error: no emulator detected\n");
62        return -1;
63    }
64
65    return port;
66}
67
68static int connect_to_console(const char* serial) {
69    int port = adb_get_emulator_console_port(serial);
70    if (port == -1) {
71        return -1;
72    }
73
74    std::string error;
75    int fd = network_loopback_client(port, SOCK_STREAM, &error);
76    if (fd == -1) {
77        fprintf(stderr, "error: could not connect to TCP port %d: %s\n", port,
78                error.c_str());
79        return -1;
80    }
81    return fd;
82}
83
84int adb_send_emulator_command(int argc, const char** argv, const char* serial) {
85    int fd = connect_to_console(serial);
86    if (fd == -1) {
87        return 1;
88    }
89
90    for (int i = 1; i < argc; i++) {
91        adb_write(fd, argv[i], strlen(argv[i]));
92        adb_write(fd, i == argc - 1 ? "\n" : " ", 1);
93    }
94
95    const char disconnect_command[] = "quit\n";
96    if (adb_write(fd, disconnect_command, sizeof(disconnect_command) - 1) == -1) {
97        LOG(FATAL) << "Could not finalize emulator command";
98    }
99
100    // Drain output that the emulator console has sent us to prevent a problem
101    // on Windows where if adb closes the socket without reading all the data,
102    // the emulator's next call to recv() will have an ECONNABORTED error,
103    // preventing the emulator from reading the command that adb has sent.
104    // https://code.google.com/p/android/issues/detail?id=21021
105    int result;
106    do {
107        char buf[BUFSIZ];
108        result = adb_read(fd, buf, sizeof(buf));
109        // Keep reading until zero bytes (EOF) or an error. If 'adb emu kill'
110        // is executed, the emulator calls exit() which causes adb to get
111        // ECONNRESET. Any other emu command is followed by the quit command
112        // that we sent above, and that causes the emulator to close the socket
113        // which should cause zero bytes (EOF) to be returned.
114    } while (result > 0);
115
116    adb_close(fd);
117
118    return 0;
119}
120