/*
* 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 <stdio.h>
#include "ui.h"
#include "cutils/properties.h"
#include "install.h"
#include "common.h"
#include "adb_install.h"
#include "minadbd/fuse_adb_provider.h"
#include "fuse_sideload.h"
#ifdef USE_OLD_VERIFIER
#include "verifier24/verifier.h"
#else
#include "verifier.h"
#endif
static void set_usb_driver(bool enabled) {
int fd = open("/sys/class/android_usb/android0/enable", O_WRONLY);
if (fd < 0) {
/* These error messages show when built in older Android branches (e.g. Gingerbread)
It's not a critical error so we're disabling the error messages.
ui->Print("failed to open driver control: %s\n", strerror(errno));
*/
printf("failed to open driver control: %s\n", strerror(errno));
return;
}
if (TEMP_FAILURE_RETRY(write(fd, enabled ? "1" : "0", 1)) == -1) {
/*
ui->Print("failed to set driver control: %s\n", strerror(errno));
*/
printf("failed to set driver control: %s\n", strerror(errno));
}
if (close(fd) < 0) {
/*
ui->Print("failed to close driver control: %s\n", strerror(errno));
*/
printf("failed to close driver control: %s\n", strerror(errno));
}
}
// On Android 8.0 for some reason init can't seem to completely stop adbd
// so we have to kill it too if it doesn't die on its own.
static void kill_adbd() {
DIR* dir = opendir("/proc");
if (dir) {
struct dirent* de = 0;
while ((de = readdir(dir)) != 0) {
if (strcmp(de->d_name, ".") == 0 || strcmp(de->d_name, "..") == 0)
continue;
int pid = -1;
int ret = sscanf(de->d_name, "%d", &pid);
if (ret == 1) {
char cmdpath[PATH_MAX];
sprintf(cmdpath, "/proc/%d/cmdline", pid);
FILE* file = fopen(cmdpath, "r");
size_t task_size = PATH_MAX;
char task[PATH_MAX];
char* p = task;
if (getline(&p, &task_size, file) > 0) {
if (strstr(task, "adbd") != 0) {
printf("adbd pid %d found, sending kill.\n", pid);
kill(pid, SIGINT);
usleep(5000);
kill(pid, SIGKILL);
}
}
fclose(file);
}
}
closedir(dir);
}
}
static void stop_adbd() {
printf("Stopping adbd...\n");
property_set("ctl.stop", "adbd");
usleep(5000);
kill_adbd();
set_usb_driver(false);
}
static bool is_ro_debuggable() {
char value[PROPERTY_VALUE_MAX+1];
return (property_get("ro.debuggable", value, NULL) == 1 && value[0] == '1');
}
static void maybe_restart_adbd() {
if (is_ro_debuggable()) {
printf("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(const char* install_file, pid_t* child_pid) {
stop_adbd();
set_usb_driver(true);
/*
int apply_from_adb(RecoveryUI* ui, bool* wipe_cache, const char* install_file) {
modified_flash = true;
stop_adbd(ui);
set_usb_driver(ui, 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", install_file, NULL);
_exit(-1);
}
*child_pid = child;
// caller can now kill the child thread from another thread
// 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 result = INSTALL_ERROR;
int status;
bool waited = false;
struct stat st;
for (int i = 0; i < ADB_INSTALL_TIMEOUT; ++i) {
if (waitpid(child, &status, WNOHANG) != 0) {
result = -1;
waited = true;
break;
}
if (stat(FUSE_SIDELOAD_HOST_PATHNAME, &st) != 0) {
if (errno == ENOENT && i < ADB_INSTALL_TIMEOUT-1) {
sleep(1);
continue;
} else {
printf("\nTimed out waiting for package: %s\n\n", strerror(errno));
result = -1;
kill(child, SIGKILL);
break;
}
}
// Install is handled elsewhere in TWRP
//install_package(FUSE_SIDELOAD_HOST_PATHNAME, wipe_cache, install_file, false);
return 0;
}
// if we got here, something failed
*child_pid = 0;
if (!waited) {
// Calling stat() on this magic filename signals the minadbd
// subprocess to shut down.
stat(FUSE_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) {
printf("\nYou need adb 1.0.32 or newer to sideload\nto this device.\n\n");
result = -2;
} else if (!WIFSIGNALED(status)) {
printf("status %d\n", WEXITSTATUS(status));
}
}
set_usb_driver(false);
maybe_restart_adbd();
return result;
}
