/*
* Copyright (C) 2012 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.
*/
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <signal.h>
#include <fcntl.h>
#include "ui.h"
#include "cutils/properties.h"
#include "install.h"
#include "common.h"
#include "adb_install.h"
extern "C" {
#include "minadbd/adb.h"
}
static RecoveryUI* ui = NULL;
static void
set_usb_driver(bool enabled) {
int fd = open("/sys/class/android_usb/android0/enable", O_WRONLY);
if (fd < 0) {
ui->Print("failed to open driver control: %s\n", strerror(errno));
return;
}
if (write(fd, enabled ? "1" : "0", 1) < 0) {
ui->Print("failed to set driver control: %s\n", strerror(errno));
}
if (close(fd) < 0) {
ui->Print("failed to close driver control: %s\n", strerror(errno));
}
}
static void
stop_adbd() {
property_set("ctl.stop", "adbd");
set_usb_driver(false);
}
static void
maybe_restart_adbd() {
char value[PROPERTY_VALUE_MAX+1];
int len = property_get("ro.debuggable", value, NULL);
if (len == 1 && value[0] == '1') {
ui->Print("Restarting adbd...\n");
set_usb_driver(true);
property_set("ctl.start", "adbd");
}
}
// How long (in seconds) we wait for the host to start sending us a
// package, before timing out.
#define ADB_INSTALL_TIMEOUT 300
int
apply_from_adb(RecoveryUI* ui_, int* wipe_cache, const char* install_file) {
ui = ui_;
stop_adbd();
set_usb_driver(true);
ui->Print("\n\nNow send the package you want to apply\n"
"to the device with \"adb sideload <filename>\"...\n");
pid_t child;
if ((child = fork()) == 0) {
execl("/sbin/recovery", "recovery", "--adbd", NULL);
_exit(-1);
}
// ADB_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 result;
int status;
bool waited = false;
struct stat st;
for (int i = 0; i < ADB_INSTALL_TIMEOUT; ++i) {
if (waitpid(child, &status, WNOHANG) != 0) {
result = INSTALL_ERROR;
waited = true;
break;
}
if (stat(ADB_SIDELOAD_HOST_PATHNAME, &st) != 0) {
if (errno == ENOENT && i < ADB_INSTALL_TIMEOUT-1) {
sleep(1);
continue;
} else {
ui->Print("\nTimed out waiting for package.\n\n", strerror(errno));
result = INSTALL_ERROR;
kill(child, SIGKILL);
break;
}
}
result = install_package(ADB_SIDELOAD_HOST_PATHNAME, wipe_cache, install_file, false);
break;
}
if (!waited) {
// Calling stat() on this magic filename signals the minadbd
// subprocess to shut down.
stat(ADB_SIDELOAD_HOST_EXIT_PATHNAME, &st);
// TODO(dougz): there should be a way to cancel waiting for a
// package (by pushing some button combo on the device). For now
// you just have to 'adb sideload' a file that's not a valid
// package, like "/dev/null".
waitpid(child, &status, 0);
}
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));
}
}
set_usb_driver(false);
maybe_restart_adbd();
return result;
}
