/*
** Copyright 2008, 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.
*/
#define LOG_TAG "installd"
#include <fcntl.h>
#include <selinux/android.h>
#include <selinux/avc.h>
#include <sys/capability.h>
#include <sys/fsuid.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <android-base/logging.h>
#include <cutils/fs.h>
#include <cutils/properties.h>
#include <log/log.h> // TODO: Move everything to base::logging.
#include <private/android_filesystem_config.h>
#include "InstalldNativeService.h"
#include "dexopt.h"
#include "globals.h"
#include "installd_constants.h"
#include "installd_deps.h" // Need to fill in requirements of commands.
#include "utils.h"
namespace android {
namespace installd {
// Check that installd-deps sizes match cutils sizes.
static_assert(kPropertyKeyMax == PROPERTY_KEY_MAX, "Size mismatch.");
static_assert(kPropertyValueMax == PROPERTY_VALUE_MAX, "Size mismatch.");
////////////////////////
// Plug-in functions. //
////////////////////////
int get_property(const char *key, char *value, const char *default_value) {
return property_get(key, value, default_value);
}
bool calculate_oat_file_path(char path[PKG_PATH_MAX], const char *oat_dir, const char *apk_path,
const char *instruction_set) {
return calculate_oat_file_path_default(path, oat_dir, apk_path, instruction_set);
}
bool calculate_odex_file_path(char path[PKG_PATH_MAX], const char *apk_path,
const char *instruction_set) {
return calculate_odex_file_path_default(path, apk_path, instruction_set);
}
bool create_cache_path(char path[PKG_PATH_MAX], const char *src, const char *instruction_set) {
return create_cache_path_default(path, src, instruction_set);
}
static bool initialize_globals() {
return init_globals_from_data_and_root();
}
static int initialize_directories() {
int res = -1;
// Read current filesystem layout version to handle upgrade paths
char version_path[PATH_MAX];
snprintf(version_path, PATH_MAX, "%s.layout_version", android_data_dir.c_str());
int oldVersion;
if (fs_read_atomic_int(version_path, &oldVersion) == -1) {
oldVersion = 0;
}
int version = oldVersion;
if (version < 2) {
SLOGD("Assuming that device has multi-user storage layout; upgrade no longer supported");
version = 2;
}
if (ensure_config_user_dirs(0) == -1) {
SLOGE("Failed to setup misc for user 0");
goto fail;
}
if (version == 2) {
SLOGD("Upgrading to /data/misc/user directories");
char misc_dir[PATH_MAX];
snprintf(misc_dir, PATH_MAX, "%smisc", android_data_dir.c_str());
char keychain_added_dir[PATH_MAX];
snprintf(keychain_added_dir, PATH_MAX, "%s/keychain/cacerts-added", misc_dir);
char keychain_removed_dir[PATH_MAX];
snprintf(keychain_removed_dir, PATH_MAX, "%s/keychain/cacerts-removed", misc_dir);
DIR *dir;
struct dirent *dirent;
dir = opendir("/data/user");
if (dir != nullptr) {
while ((dirent = readdir(dir))) {
const char *name = dirent->d_name;
// skip "." and ".."
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
uint32_t user_id = std::stoi(name);
// /data/misc/user/<user_id>
if (ensure_config_user_dirs(user_id) == -1) {
goto fail;
}
char misc_added_dir[PATH_MAX];
snprintf(misc_added_dir, PATH_MAX, "%s/user/%s/cacerts-added", misc_dir, name);
char misc_removed_dir[PATH_MAX];
snprintf(misc_removed_dir, PATH_MAX, "%s/user/%s/cacerts-removed", misc_dir, name);
uid_t uid = multiuser_get_uid(user_id, AID_SYSTEM);
gid_t gid = uid;
if (access(keychain_added_dir, F_OK) == 0) {
if (copy_dir_files(keychain_added_dir, misc_added_dir, uid, gid) != 0) {
SLOGE("Some files failed to copy");
}
}
if (access(keychain_removed_dir, F_OK) == 0) {
if (copy_dir_files(keychain_removed_dir, misc_removed_dir, uid, gid) != 0) {
SLOGE("Some files failed to copy");
}
}
}
closedir(dir);
if (access(keychain_added_dir, F_OK) == 0) {
delete_dir_contents(keychain_added_dir, 1, nullptr);
}
if (access(keychain_removed_dir, F_OK) == 0) {
delete_dir_contents(keychain_removed_dir, 1, nullptr);
}
}
version = 3;
}
// Persist layout version if changed
if (version != oldVersion) {
if (fs_write_atomic_int(version_path, version) == -1) {
SLOGE("Failed to save version to %s: %s", version_path, strerror(errno));
goto fail;
}
}
// Success!
res = 0;
fail:
return res;
}
static int log_callback(int type, const char *fmt, ...) { // NOLINT
va_list ap;
int priority;
switch (type) {
case SELINUX_WARNING:
priority = ANDROID_LOG_WARN;
break;
case SELINUX_INFO:
priority = ANDROID_LOG_INFO;
break;
default:
priority = ANDROID_LOG_ERROR;
break;
}
va_start(ap, fmt);
LOG_PRI_VA(priority, "SELinux", fmt, ap);
va_end(ap);
return 0;
}
static int installd_main(const int argc ATTRIBUTE_UNUSED, char *argv[]) {
int ret;
int selinux_enabled = (is_selinux_enabled() > 0);
setenv("ANDROID_LOG_TAGS", "*:v", 1);
android::base::InitLogging(argv);
SLOGI("installd firing up");
union selinux_callback cb;
cb.func_log = log_callback;
selinux_set_callback(SELINUX_CB_LOG, cb);
if (!initialize_globals()) {
SLOGE("Could not initialize globals; exiting.\n");
exit(1);
}
if (initialize_directories() < 0) {
SLOGE("Could not create directories; exiting.\n");
exit(1);
}
if (selinux_enabled && selinux_status_open(true) < 0) {
SLOGE("Could not open selinux status; exiting.\n");
exit(1);
}
if ((ret = InstalldNativeService::start()) != android::OK) {
SLOGE("Unable to start InstalldNativeService: %d", ret);
exit(1);
}
IPCThreadState::self()->joinThreadPool();
LOG(INFO) << "installd shutting down";
return 0;
}
} // namespace installd
} // namespace android
int main(const int argc, char *argv[]) {
return android::installd::installd_main(argc, argv);
}