/*
** 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.
*/
#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/socket.h>
#include <sys/stat.h>
#include <android-base/logging.h>
#include <cutils/fs.h>
#include <cutils/log.h> // TODO: Move everything to base::logging.
#include <cutils/properties.h>
#include <cutils/sockets.h>
#include <private/android_filesystem_config.h>
#include <commands.h>
#include <globals.h>
#include <installd_constants.h>
#include <installd_deps.h> // Need to fill in requirements of commands.
#include <utils.h>
#ifndef LOG_TAG
#define LOG_TAG "installd"
#endif
#define SOCKET_PATH "installd"
#define BUFFER_MAX 1024 /* input buffer for commands */
#define TOKEN_MAX 16 /* max number of arguments in buffer */
#define REPLY_MAX 256 /* largest reply allowed */
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);
}
// Compute the output path of
bool calculate_oat_file_path(char path[PKG_PATH_MAX],
const char *oat_dir,
const char *apk_path,
const char *instruction_set) {
char *file_name_start;
char *file_name_end;
file_name_start = strrchr(apk_path, '/');
if (file_name_start == NULL) {
ALOGE("apk_path '%s' has no '/'s in it\n", apk_path);
return false;
}
file_name_end = strrchr(apk_path, '.');
if (file_name_end < file_name_start) {
ALOGE("apk_path '%s' has no extension\n", apk_path);
return false;
}
// Calculate file_name
int file_name_len = file_name_end - file_name_start - 1;
char file_name[file_name_len + 1];
memcpy(file_name, file_name_start + 1, file_name_len);
file_name[file_name_len] = '\0';
// <apk_parent_dir>/oat/<isa>/<file_name>.odex
snprintf(path, PKG_PATH_MAX, "%s/%s/%s.odex", oat_dir, instruction_set, file_name);
return true;
}
/*
* Computes the odex file for the given apk_path and instruction_set.
* /system/framework/whatever.jar -> /system/framework/oat/<isa>/whatever.odex
*
* Returns false if it failed to determine the odex file path.
*/
bool calculate_odex_file_path(char path[PKG_PATH_MAX],
const char *apk_path,
const char *instruction_set) {
if (strlen(apk_path) + strlen("oat/") + strlen(instruction_set)
+ strlen("/") + strlen("odex") + 1 > PKG_PATH_MAX) {
ALOGE("apk_path '%s' may be too long to form odex file path.\n", apk_path);
return false;
}
strcpy(path, apk_path);
char *end = strrchr(path, '/');
if (end == NULL) {
ALOGE("apk_path '%s' has no '/'s in it?!\n", apk_path);
return false;
}
const char *apk_end = apk_path + (end - path); // strrchr(apk_path, '/');
strcpy(end + 1, "oat/"); // path = /system/framework/oat/\0
strcat(path, instruction_set); // path = /system/framework/oat/<isa>\0
strcat(path, apk_end); // path = /system/framework/oat/<isa>/whatever.jar\0
end = strrchr(path, '.');
if (end == NULL) {
ALOGE("apk_path '%s' has no extension.\n", apk_path);
return false;
}
strcpy(end + 1, "odex");
return true;
}
bool create_cache_path(char path[PKG_PATH_MAX],
const char *src,
const char *instruction_set) {
/* demand that we are an absolute path */
if ((src == nullptr) || (src[0] != '/') || strstr(src,"..")) {
return false;
}
size_t srclen = strlen(src);
if (srclen > PKG_PATH_MAX) { // XXX: PKG_NAME_MAX?
return false;
}
size_t dstlen =
android_data_dir.len +
strlen(DALVIK_CACHE) +
1 +
strlen(instruction_set) +
srclen +
strlen(DALVIK_CACHE_POSTFIX) + 2;
if (dstlen > PKG_PATH_MAX) {
return false;
}
sprintf(path,"%s%s/%s/%s%s",
android_data_dir.path,
DALVIK_CACHE,
instruction_set,
src + 1, /* skip the leading / */
DALVIK_CACHE_POSTFIX);
char* tmp =
path +
android_data_dir.len +
strlen(DALVIK_CACHE) +
1 +
strlen(instruction_set) + 1;
for(; *tmp; tmp++) {
if (*tmp == '/') {
*tmp = '@';
}
}
return true;
}
static char* parse_null(char* arg) {
if (strcmp(arg, "!") == 0) {
return nullptr;
} else {
return arg;
}
}
static int do_ping(char **arg ATTRIBUTE_UNUSED, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
{
return 0;
}
static int do_create_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
/* const char *uuid, const char *pkgname, userid_t userid, int flags,
appid_t appid, const char* seinfo, int target_sdk_version */
return create_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]),
atoi(arg[4]), arg[5], atoi(arg[6]));
}
static int do_restorecon_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
/* const char* uuid, const char* pkgName, userid_t userid, int flags,
appid_t appid, const char* seinfo */
return restorecon_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), atoi(arg[4]), arg[5]);
}
static int do_migrate_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
/* const char *uuid, const char *pkgname, userid_t userid, int flags */
return migrate_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]));
}
static int do_clear_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
/* const char *uuid, const char *pkgname, userid_t userid, int flags, ino_t ce_data_inode */
return clear_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), atol(arg[4]));
}
static int do_destroy_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
/* const char *uuid, const char *pkgname, userid_t userid, int flags, ino_t ce_data_inode */
return destroy_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), atol(arg[4]));
}
// We use otapreopt_chroot to get into the chroot.
static constexpr const char* kOtaPreopt = "/system/bin/otapreopt_chroot";
static int do_ota_dexopt(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
// Time to fork and run otapreopt.
// Check that the tool exists.
struct stat s;
if (stat(kOtaPreopt, &s) != 0) {
LOG(ERROR) << "Otapreopt chroot tool not found.";
return -1;
}
pid_t pid = fork();
if (pid == 0) {
const char* argv[1 + 9 + 1];
argv[0] = kOtaPreopt;
for (size_t i = 1; i <= 9; ++i) {
argv[i] = arg[i - 1];
}
argv[10] = nullptr;
execv(argv[0], (char * const *)argv);
PLOG(ERROR) << "execv(OTAPREOPT_CHROOT) failed";
exit(99);
} else {
int res = wait_child(pid);
if (res == 0) {
ALOGV("DexInv: --- END OTAPREOPT (success) ---\n");
} else {
ALOGE("DexInv: --- END OTAPREOPT --- status=0x%04x, process failed\n", res);
}
return res;
}
}
static int do_dexopt(char **arg, char reply[REPLY_MAX])
{
int dexopt_flags = atoi(arg[6]);
if ((dexopt_flags & DEXOPT_OTA) != 0) {
return do_ota_dexopt(arg, reply);
}
return dexopt(arg[0], // apk_path
atoi(arg[1]), // uid
arg[2], // pkgname
arg[3], // instruction_set
atoi(arg[4]), // dexopt_needed
arg[5], // oat_dir
dexopt_flags,
arg[7], // compiler_filter
parse_null(arg[8]), // volume_uuid
parse_null(arg[9])); // shared_libraries
}
static int do_merge_profiles(char **arg, char reply[REPLY_MAX])
{
uid_t uid = static_cast<uid_t>(atoi(arg[0]));
const char* pkgname = arg[1];
if (merge_profiles(uid, pkgname)) {
strncpy(reply, "true", REPLY_MAX);
} else {
strncpy(reply, "false", REPLY_MAX);
}
return 0;
}
static int do_dump_profiles(char **arg, char reply[REPLY_MAX])
{
uid_t uid = static_cast<uid_t>(atoi(arg[0]));
const char* pkgname = arg[1];
const char* dex_files = arg[2];
if (dump_profile(uid, pkgname, dex_files)) {
strncpy(reply, "true", REPLY_MAX);
} else {
strncpy(reply, "false", REPLY_MAX);
}
return 0;
}
static int do_mark_boot_complete(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
{
return mark_boot_complete(arg[0] /* instruction set */);
}
static int do_rm_dex(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
{
return rm_dex(arg[0], arg[1]); /* pkgname, instruction_set */
}
static int do_free_cache(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) /* TODO int:free_size */
{
return free_cache(parse_null(arg[0]), (int64_t)atoll(arg[1])); /* uuid, free_size */
}
static int do_get_app_size(char **arg, char reply[REPLY_MAX]) {
int64_t codesize = 0;
int64_t datasize = 0;
int64_t cachesize = 0;
int64_t asecsize = 0;
int res = 0;
/* const char *uuid, const char *pkgname, int userid, int flags, ino_t ce_data_inode,
const char* code_path */
res = get_app_size(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), atol(arg[4]),
arg[5], &codesize, &datasize, &cachesize, &asecsize);
/*
* Each int64_t can take up 22 characters printed out. Make sure it
* doesn't go over REPLY_MAX in the future.
*/
snprintf(reply, REPLY_MAX, "%" PRId64 " %" PRId64 " %" PRId64 " %" PRId64,
codesize, datasize, cachesize, asecsize);
return res;
}
static int do_get_app_data_inode(char **arg, char reply[REPLY_MAX]) {
ino_t inode = 0;
int res = 0;
/* const char *uuid, const char *pkgname, int userid, int flags */
res = get_app_data_inode(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), &inode);
snprintf(reply, REPLY_MAX, "%" PRId64, (int64_t) inode);
return res;
}
static int do_move_complete_app(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
/* const char* from_uuid, const char *to_uuid, const char *package_name,
const char *data_app_name, appid_t appid, const char* seinfo,
int target_sdk_version */
return move_complete_app(parse_null(arg[0]), parse_null(arg[1]), arg[2], arg[3],
atoi(arg[4]), arg[5], atoi(arg[6]));
}
static int do_create_user_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
{
/* const char *uuid, userid_t userid, int user_serial, int flags */
return create_user_data(parse_null(arg[0]), atoi(arg[1]), atoi(arg[2]), atoi(arg[3]));
}
static int do_destroy_user_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
{
/* const char *uuid, userid_t userid, int flags */
return destroy_user_data(parse_null(arg[0]), atoi(arg[1]), atoi(arg[2]));
}
static int do_linklib(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
{
return linklib(parse_null(arg[0]), arg[1], arg[2], atoi(arg[3]));
}
static int do_idmap(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
{
return idmap(arg[0], arg[1], atoi(arg[2]));
}
static int do_create_oat_dir(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
{
/* oat_dir, instruction_set */
return create_oat_dir(arg[0], arg[1]);
}
static int do_rm_package_dir(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
{
/* oat_dir */
return rm_package_dir(arg[0]);
}
static int do_clear_app_profiles(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
{
/* package_name */
return clear_app_profiles(arg[0]);
}
static int do_destroy_app_profiles(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
{
/* package_name */
return destroy_app_profiles(arg[0]);
}
static int do_link_file(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED)
{
/* relative_path, from_base, to_base */
return link_file(arg[0], arg[1], arg[2]);
}
static int do_move_ab(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) {
// apk_path, instruction_set, oat_dir
return move_ab(arg[0], arg[1], arg[2]);
}
struct cmdinfo {
const char *name;
unsigned numargs;
int (*func)(char **arg, char reply[REPLY_MAX]);
};
struct cmdinfo cmds[] = {
{ "ping", 0, do_ping },
{ "create_app_data", 7, do_create_app_data },
{ "restorecon_app_data", 6, do_restorecon_app_data },
{ "migrate_app_data", 4, do_migrate_app_data },
{ "clear_app_data", 5, do_clear_app_data },
{ "destroy_app_data", 5, do_destroy_app_data },
{ "move_complete_app", 7, do_move_complete_app },
{ "get_app_size", 6, do_get_app_size },
{ "get_app_data_inode", 4, do_get_app_data_inode },
{ "create_user_data", 4, do_create_user_data },
{ "destroy_user_data", 3, do_destroy_user_data },
{ "dexopt", 10, do_dexopt },
{ "markbootcomplete", 1, do_mark_boot_complete },
{ "rmdex", 2, do_rm_dex },
{ "freecache", 2, do_free_cache },
{ "linklib", 4, do_linklib },
{ "idmap", 3, do_idmap },
{ "createoatdir", 2, do_create_oat_dir },
{ "rmpackagedir", 1, do_rm_package_dir },
{ "clear_app_profiles", 1, do_clear_app_profiles },
{ "destroy_app_profiles", 1, do_destroy_app_profiles },
{ "linkfile", 3, do_link_file },
{ "move_ab", 3, do_move_ab },
{ "merge_profiles", 2, do_merge_profiles },
{ "dump_profiles", 3, do_dump_profiles },
};
static int readx(int s, void *_buf, int count)
{
char *buf = (char *) _buf;
int n = 0, r;
if (count < 0) return -1;
while (n < count) {
r = read(s, buf + n, count - n);
if (r < 0) {
if (errno == EINTR) continue;
ALOGE("read error: %s\n", strerror(errno));
return -1;
}
if (r == 0) {
ALOGE("eof\n");
return -1; /* EOF */
}
n += r;
}
return 0;
}
static int writex(int s, const void *_buf, int count)
{
const char *buf = (const char *) _buf;
int n = 0, r;
if (count < 0) return -1;
while (n < count) {
r = write(s, buf + n, count - n);
if (r < 0) {
if (errno == EINTR) continue;
ALOGE("write error: %s\n", strerror(errno));
return -1;
}
n += r;
}
return 0;
}
/* Tokenize the command buffer, locate a matching command,
* ensure that the required number of arguments are provided,
* call the function(), return the result.
*/
static int execute(int s, char cmd[BUFFER_MAX])
{
char reply[REPLY_MAX];
char *arg[TOKEN_MAX+1];
unsigned i;
unsigned n = 0;
unsigned short count;
int ret = -1;
// ALOGI("execute('%s')\n", cmd);
/* default reply is "" */
reply[0] = 0;
/* n is number of args (not counting arg[0]) */
arg[0] = cmd;
while (*cmd) {
if (isspace(*cmd)) {
*cmd++ = 0;
n++;
arg[n] = cmd;
if (n == TOKEN_MAX) {
ALOGE("too many arguments\n");
goto done;
}
}
if (*cmd) {
cmd++;
}
}
for (i = 0; i < sizeof(cmds) / sizeof(cmds[0]); i++) {
if (!strcmp(cmds[i].name,arg[0])) {
if (n != cmds[i].numargs) {
ALOGE("%s requires %d arguments (%d given)\n",
cmds[i].name, cmds[i].numargs, n);
} else {
ret = cmds[i].func(arg + 1, reply);
}
goto done;
}
}
ALOGE("unsupported command '%s'\n", arg[0]);
done:
if (reply[0]) {
n = snprintf(cmd, BUFFER_MAX, "%d %s", ret, reply);
} else {
n = snprintf(cmd, BUFFER_MAX, "%d", ret);
}
if (n > BUFFER_MAX) n = BUFFER_MAX;
count = n;
// ALOGI("reply: '%s'\n", cmd);
if (writex(s, &count, sizeof(count))) return -1;
if (writex(s, cmd, count)) return -1;
return 0;
}
bool initialize_globals() {
const char* data_path = getenv("ANDROID_DATA");
if (data_path == nullptr) {
ALOGE("Could not find ANDROID_DATA");
return false;
}
const char* root_path = getenv("ANDROID_ROOT");
if (root_path == nullptr) {
ALOGE("Could not find ANDROID_ROOT");
return false;
}
return init_globals_from_data_and_root(data_path, root_path);
}
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.path);
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) {
ALOGE("Failed to setup misc for user 0");
goto fail;
}
if (version == 2) {
ALOGD("Upgrading to /data/misc/user directories");
char misc_dir[PATH_MAX];
snprintf(misc_dir, PATH_MAX, "%smisc", android_data_dir.path);
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 != NULL) {
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 = atoi(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) {
ALOGE("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) {
ALOGE("Some files failed to copy");
}
}
}
closedir(dir);
if (access(keychain_added_dir, F_OK) == 0) {
delete_dir_contents(keychain_added_dir, 1, 0);
}
if (access(keychain_removed_dir, F_OK) == 0) {
delete_dir_contents(keychain_removed_dir, 1, 0);
}
}
version = 3;
}
// Persist layout version if changed
if (version != oldVersion) {
if (fs_write_atomic_int(version_path, version) == -1) {
ALOGE("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, ...) {
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[]) {
char buf[BUFFER_MAX];
struct sockaddr addr;
socklen_t alen;
int lsocket, s;
int selinux_enabled = (is_selinux_enabled() > 0);
setenv("ANDROID_LOG_TAGS", "*:v", 1);
android::base::InitLogging(argv);
ALOGI("installd firing up\n");
union selinux_callback cb;
cb.func_log = log_callback;
selinux_set_callback(SELINUX_CB_LOG, cb);
if (!initialize_globals()) {
ALOGE("Could not initialize globals; exiting.\n");
exit(1);
}
if (initialize_directories() < 0) {
ALOGE("Could not create directories; exiting.\n");
exit(1);
}
if (selinux_enabled && selinux_status_open(true) < 0) {
ALOGE("Could not open selinux status; exiting.\n");
exit(1);
}
lsocket = android_get_control_socket(SOCKET_PATH);
if (lsocket < 0) {
ALOGE("Failed to get socket from environment: %s\n", strerror(errno));
exit(1);
}
if (listen(lsocket, 5)) {
ALOGE("Listen on socket failed: %s\n", strerror(errno));
exit(1);
}
fcntl(lsocket, F_SETFD, FD_CLOEXEC);
for (;;) {
alen = sizeof(addr);
s = accept(lsocket, &addr, &alen);
if (s < 0) {
ALOGE("Accept failed: %s\n", strerror(errno));
continue;
}
fcntl(s, F_SETFD, FD_CLOEXEC);
ALOGI("new connection\n");
for (;;) {
unsigned short count;
if (readx(s, &count, sizeof(count))) {
ALOGE("failed to read size\n");
break;
}
if ((count < 1) || (count >= BUFFER_MAX)) {
ALOGE("invalid size %d\n", count);
break;
}
if (readx(s, buf, count)) {
ALOGE("failed to read command\n");
break;
}
buf[count] = 0;
if (selinux_enabled && selinux_status_updated() > 0) {
selinux_android_seapp_context_reload();
}
if (execute(s, buf)) break;
}
ALOGI("closing connection\n");
close(s);
}
return 0;
}
} // namespace installd
} // namespace android
int main(const int argc, char *argv[]) {
return android::installd::installd_main(argc, argv);
}