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adb_install.cpp
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adb_install.cpp
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/*
* Copyright (C) 2012 The Android Open Source Project
* Copyright (C) 2019 The LineageOS 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.
*/
#include "adb_install.h"
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/unique_fd.h>
#include "common.h"
#include "fuse_sideload.h"
#include "install.h"
#include "ui.h"
static void set_usb_driver(bool enabled) {
// USB configfs doesn't use /s/c/a/a/enable.
if (android::base::GetBoolProperty("sys.usb.configfs", false)) {
return;
}
static constexpr const char* USB_DRIVER_CONTROL = "/sys/class/android_usb/android0/enable";
android::base::unique_fd fd(open(USB_DRIVER_CONTROL, O_WRONLY));
if (fd == -1) {
PLOG(ERROR) << "Failed to open driver control";
return;
}
// Not using android::base::WriteStringToFile since that will open with O_CREAT and give EPERM
// when USB_DRIVER_CONTROL doesn't exist. When it gives EPERM, we don't know whether that's due
// to non-existent USB_DRIVER_CONTROL or indeed a permission issue.
if (!android::base::WriteStringToFd(enabled ? "1" : "0", fd)) {
PLOG(ERROR) << "Failed to set driver control";
}
}
static void stop_adbd() {
ui->Print("Stopping adbd...\n");
android::base::SetProperty("ctl.stop", "adbd");
set_usb_driver(false);
}
static void maybe_restart_adbd() {
if (is_ro_debuggable()) {
ui->Print("Restarting adbd...\n");
set_usb_driver(true);
android::base::SetProperty("ctl.start", "adbd");
}
}
static pthread_t sideload_thread;
static pid_t sideload_adb_pid;
static bool sideload_cancelled;
static bool sideload_started;
static void* adb_sideload_thread(void*) {
time_t start_time = time(nullptr);
time_t now = start_time;
// How long (in seconds) we wait for the host to start sending us a package, before timing out.
static constexpr int ADB_INSTALL_TIMEOUT = 300;
// FUSE_SIDELOAD_HOST_PATHNAME will start to exist once the host connects and starts serving a
// package. Poll for its appearance. (Note that inotify doesn't work with FUSE.)
int status = -1;
while (now - start_time < ADB_INSTALL_TIMEOUT) {
// Exit if either:
// - The adb child process dies, or
// - The ui tells us to cancel
if (kill(sideload_adb_pid, 0) != 0) {
break;
}
if (sideload_cancelled) {
break;
}
struct stat st;
status = stat(FUSE_SIDELOAD_HOST_PATHNAME, &st);
if (status == 0) {
break;
}
if (errno != ENOENT && errno != ENOTCONN) {
ui->Print("\nError %s waiting for package\n\n", strerror(errno));
break;
}
sleep(1);
now = time(nullptr);
}
if (status == 0) {
sideload_started = true;
// Signal UI thread that sideload has started
ui->CancelWaitKey();
}
return nullptr;
}
void sideload_start() {
stop_adbd();
set_usb_driver(true);
if ((sideload_adb_pid = fork()) == 0) {
execl("/sbin/recovery", "recovery", "--adbd", nullptr);
_exit(EXIT_FAILURE);
}
ui->Print(
"\n\nNow send the package you want to apply\n"
"to the device with \"adb sideload <filename>\"...\n");
sideload_cancelled = false;
sideload_started = false;
pthread_create(&sideload_thread, nullptr, &adb_sideload_thread, nullptr);
}
void sideload_wait(bool cancel) {
if (cancel) {
sideload_cancelled = true;
}
pthread_join(sideload_thread, nullptr);
}
int sideload_install(bool* wipe_cache, const char* install_file, bool verify) {
int result = INSTALL_ERROR;
if (sideload_started) {
modified_flash = true;
set_perf_mode(true);
result =
install_package(FUSE_SIDELOAD_HOST_PATHNAME, wipe_cache, install_file, false, 0, verify);
set_perf_mode(false);
}
return result;
}
void sideload_stop() {
// Ensure adb exits
int status;
kill(sideload_adb_pid, SIGTERM);
waitpid(sideload_adb_pid, &status, 0);
sideload_started = false;
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
if (WEXITSTATUS(status) == 3) {
ui->Print("\nYou need adb 1.0.32 or newer to sideload\nto this device.\n\n");
} else if (!WIFSIGNALED(status)) {
ui->Print("\n(adbd status %d)\n", WEXITSTATUS(status));
}
}
ui->FlushKeys();
maybe_restart_adbd();
}