blob: 15c6abdf195aa84b14b8500a653dc012c28a40d3 [file] [log] [blame]
* 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include "sysdeps.h"
#include <stdio.h>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/strings.h>
#include <cutils/sockets.h>
#include "adb.h"
#include "adb_client.h"
#include "adb_io.h"
// Return the console port of the currently connected emulator (if any) or -1 if
// there is no emulator, and -2 if there is more than one.
static int adb_get_emulator_console_port(const char* serial) {
if (serial) {
// The user specified a serial number; is it an emulator?
int port;
return (sscanf(serial, "emulator-%d", &port) == 1) ? port : -1;
// No specific device was given, so get the list of connected devices and
// search for emulators. If there's one, we'll take it. If there are more
// than one, that's an error.
std::string devices;
std::string error;
if (!adb_query("host:devices", &devices, &error)) {
fprintf(stderr, "error: no emulator connected: %s\n", error.c_str());
return -1;
int port;
size_t emulator_count = 0;
for (const auto& device : android::base::Split(devices, "\n")) {
if (sscanf(device.c_str(), "emulator-%d", &port) == 1) {
if (++emulator_count > 1) {
stderr, "error: more than one emulator detected; use -s\n");
return -1;
if (emulator_count == 0) {
fprintf(stderr, "error: no emulator detected\n");
return -1;
return port;
static int connect_to_console(const char* serial) {
int port = adb_get_emulator_console_port(serial);
if (port == -1) {
return -1;
std::string error;
int fd = network_loopback_client(port, SOCK_STREAM, &error);
if (fd == -1) {
fprintf(stderr, "error: could not connect to TCP port %d: %s\n", port,
return -1;
return fd;
int adb_send_emulator_command(int argc, const char** argv, const char* serial) {
int fd = connect_to_console(serial);
if (fd == -1) {
return 1;
std::string commands;
for (int i = 1; i < argc; i++) {
commands.append(i == argc - 1 ? "\n" : " ");
if (!WriteFdExactly(fd, commands)) {
fprintf(stderr, "error: cannot write to emulator: %s\n",
return 1;
// Drain output that the emulator console has sent us to prevent a problem
// on Windows where if adb closes the socket without reading all the data,
// the emulator's next call to recv() will have an ECONNABORTED error,
// preventing the emulator from reading the command that adb has sent.
int result;
do {
char buf[BUFSIZ];
result = adb_read(fd, buf, sizeof(buf));
// Keep reading until zero bytes (orderly/graceful shutdown) or an
// error. If 'adb emu kill' is executed, the emulator calls exit() with
// the socket open (and shutdown(SD_SEND) was not called), which causes
// Windows to send a TCP RST segment which causes adb to get ECONNRESET.
// Any other emu command is followed by the quit command that we
// appended above, and that causes the emulator to close the socket
// which should cause zero bytes (orderly/graceful shutdown) to be
// returned.
} while (result > 0);
return 0;