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review.shift-gmbh.com / SHIFTPHONES / android_frameworks_native / b0fad6d04ba05fbad5ce31c7382be174ed5a70b1 / . / cmds / installd / commands.cpp
blob: fad5ce6506a936a3db7fd74c3ea77fa19e56b8df [file] [log] [blame]
/*
** 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 "commands.h"
#include <errno.h>
#include <inttypes.h>
#include <stdlib.h>
#include <sys/capability.h>
#include <sys/file.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <unistd.h>
#include <android-base/stringprintf.h>
#include <android-base/logging.h>
#include <cutils/fs.h>
#include <cutils/log.h> // TODO: Move everything to base/logging.
#include <cutils/sched_policy.h>
#include <diskusage/dirsize.h>
#include <logwrap/logwrap.h>
#include <private/android_filesystem_config.h>
#include <selinux/android.h>
#include <system/thread_defs.h>
#include <globals.h>
#include <installd_deps.h>
#include <utils.h>
#ifndef LOG_TAG
#define LOG_TAG "installd"
#endif
using android::base::StringPrintf;
namespace android {
namespace installd {
static const char* kCpPath = "/system/bin/cp";
#define MIN_RESTRICTED_HOME_SDK_VERSION 24 // > M
int create_app_data(const char *uuid, const char *pkgname, userid_t userid, int flags,
appid_t appid, const char* seinfo, int target_sdk_version) {
uid_t uid = multiuser_get_uid(userid, appid);
int target_mode = target_sdk_version >= MIN_RESTRICTED_HOME_SDK_VERSION ? 0700 : 0751;
if (flags & FLAG_CE_STORAGE) {
auto path = create_data_user_package_path(uuid, userid, pkgname);
if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, uid) != 0) {
PLOG(ERROR) << "Failed to prepare " << path;
return -1;
}
if (selinux_android_setfilecon(path.c_str(), pkgname, seinfo, uid) < 0) {
PLOG(ERROR) << "Failed to setfilecon " << path;
return -1;
}
}
if (flags & FLAG_DE_STORAGE) {
auto path = create_data_user_de_package_path(uuid, userid, pkgname);
if (fs_prepare_dir_strict(path.c_str(), target_mode, uid, uid) == -1) {
PLOG(ERROR) << "Failed to prepare " << path;
// TODO: include result once 25796509 is fixed
return 0;
}
if (selinux_android_setfilecon(path.c_str(), pkgname, seinfo, uid) < 0) {
PLOG(ERROR) << "Failed to setfilecon " << path;
// TODO: include result once 25796509 is fixed
return 0;
}
}
return 0;
}
int clear_app_data(const char *uuid, const char *pkgname, userid_t userid, int flags) {
std::string suffix = "";
if (flags & FLAG_CLEAR_CACHE_ONLY) {
suffix = CACHE_DIR_POSTFIX;
} else if (flags & FLAG_CLEAR_CODE_CACHE_ONLY) {
suffix = CODE_CACHE_DIR_POSTFIX;
}
int res = 0;
if (flags & FLAG_CE_STORAGE) {
auto path = create_data_user_package_path(uuid, userid, pkgname) + suffix;
if (access(path.c_str(), F_OK) == 0) {
res |= delete_dir_contents(path);
}
}
if (flags & FLAG_DE_STORAGE) {
auto path = create_data_user_de_package_path(uuid, userid, pkgname) + suffix;
if (access(path.c_str(), F_OK) == 0) {
// TODO: include result once 25796509 is fixed
delete_dir_contents(path);
}
}
return res;
}
int destroy_app_data(const char *uuid, const char *pkgname, userid_t userid, int flags) {
int res = 0;
if (flags & FLAG_CE_STORAGE) {
res |= delete_dir_contents_and_dir(
create_data_user_package_path(uuid, userid, pkgname));
}
if (flags & FLAG_DE_STORAGE) {
// TODO: include result once 25796509 is fixed
delete_dir_contents_and_dir(
create_data_user_de_package_path(uuid, userid, pkgname));
}
return res;
}
int move_complete_app(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) {
std::vector<userid_t> users = get_known_users(from_uuid);
// Copy app
{
std::string from(create_data_app_package_path(from_uuid, data_app_name));
std::string to(create_data_app_package_path(to_uuid, data_app_name));
std::string to_parent(create_data_app_path(to_uuid));
char *argv[] = {
(char*) kCpPath,
(char*) "-F", /* delete any existing destination file first (--remove-destination) */
(char*) "-p", /* preserve timestamps, ownership, and permissions */
(char*) "-R", /* recurse into subdirectories (DEST must be a directory) */
(char*) "-P", /* Do not follow symlinks [default] */
(char*) "-d", /* don't dereference symlinks */
(char*) from.c_str(),
(char*) to_parent.c_str()
};
LOG(DEBUG) << "Copying " << from << " to " << to;
int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true);
if (rc != 0) {
LOG(ERROR) << "Failed copying " << from << " to " << to
<< ": status " << rc;
goto fail;
}
if (selinux_android_restorecon(to.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) {
LOG(ERROR) << "Failed to restorecon " << to;
goto fail;
}
}
// Copy private data for all known users
// TODO: handle user_de paths
for (auto user : users) {
std::string from(create_data_user_package_path(from_uuid, user, package_name));
std::string to(create_data_user_package_path(to_uuid, user, package_name));
std::string to_parent(create_data_user_path(to_uuid, user));
// Data source may not exist for all users; that's okay
if (access(from.c_str(), F_OK) != 0) {
LOG(INFO) << "Missing source " << from;
continue;
}
std::string user_path(create_data_user_path(to_uuid, user));
if (fs_prepare_dir(user_path.c_str(), 0771, AID_SYSTEM, AID_SYSTEM) != 0) {
LOG(ERROR) << "Failed to prepare user target " << user_path;
goto fail;
}
if (create_app_data(to_uuid, package_name, user, FLAG_CE_STORAGE | FLAG_DE_STORAGE,
appid, seinfo, target_sdk_version) != 0) {
LOG(ERROR) << "Failed to create package target " << to;
goto fail;
}
char *argv[] = {
(char*) kCpPath,
(char*) "-F", /* delete any existing destination file first (--remove-destination) */
(char*) "-p", /* preserve timestamps, ownership, and permissions */
(char*) "-R", /* recurse into subdirectories (DEST must be a directory) */
(char*) "-P", /* Do not follow symlinks [default] */
(char*) "-d", /* don't dereference symlinks */
(char*) from.c_str(),
(char*) to_parent.c_str()
};
LOG(DEBUG) << "Copying " << from << " to " << to;
int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true);
if (rc != 0) {
LOG(ERROR) << "Failed copying " << from << " to " << to
<< ": status " << rc;
goto fail;
}
if (restorecon_app_data(to_uuid, package_name, user, FLAG_CE_STORAGE | FLAG_DE_STORAGE,
appid, seinfo) != 0) {
LOG(ERROR) << "Failed to restorecon";
goto fail;
}
}
// We let the framework scan the new location and persist that before
// deleting the data in the old location; this ordering ensures that
// we can recover from things like battery pulls.
return 0;
fail:
// Nuke everything we might have already copied
{
std::string to(create_data_app_package_path(to_uuid, data_app_name));
if (delete_dir_contents(to.c_str(), 1, NULL) != 0) {
LOG(WARNING) << "Failed to rollback " << to;
}
}
for (auto user : users) {
std::string to(create_data_user_package_path(to_uuid, user, package_name));
if (delete_dir_contents(to.c_str(), 1, NULL) != 0) {
LOG(WARNING) << "Failed to rollback " << to;
}
}
return -1;
}
int make_user_config(userid_t userid)
{
if (ensure_config_user_dirs(userid) == -1) {
return -1;
}
return 0;
}
int delete_user(const char *uuid, userid_t userid) {
int res = 0;
std::string data_path(create_data_user_path(uuid, userid));
std::string data_de_path(create_data_user_de_path(uuid, userid));
std::string media_path(create_data_media_path(uuid, userid));
res |= delete_dir_contents_and_dir(data_path);
// TODO: include result once 25796509 is fixed
delete_dir_contents_and_dir(data_de_path);
res |= delete_dir_contents_and_dir(media_path);
// Config paths only exist on internal storage
if (uuid == nullptr) {
char config_path[PATH_MAX];
if ((create_user_config_path(config_path, userid) != 0)
|| (delete_dir_contents(config_path, 1, NULL) != 0)) {
res = -1;
}
}
return res;
}
/* Try to ensure free_size bytes of storage are available.
* Returns 0 on success.
* This is rather simple-minded because doing a full LRU would
* be potentially memory-intensive, and without atime it would
* also require that apps constantly modify file metadata even
* when just reading from the cache, which is pretty awful.
*/
int free_cache(const char *uuid, int64_t free_size)
{
cache_t* cache;
int64_t avail;
DIR *d;
struct dirent *de;
char tmpdir[PATH_MAX];
char *dirpos;
std::string data_path(create_data_path(uuid));
avail = data_disk_free(data_path);
if (avail < 0) return -1;
ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", free_size, avail);
if (avail >= free_size) return 0;
cache = start_cache_collection();
// Special case for owner on internal storage
if (uuid == nullptr) {
std::string _tmpdir(create_data_user_path(nullptr, 0));
add_cache_files(cache, _tmpdir.c_str(), "cache");
}
// Search for other users and add any cache files from them.
std::string _tmpdir(create_data_path(uuid) + "/" + SECONDARY_USER_PREFIX);
strcpy(tmpdir, _tmpdir.c_str());
dirpos = tmpdir + strlen(tmpdir);
d = opendir(tmpdir);
if (d != NULL) {
while ((de = readdir(d))) {
if (de->d_type == DT_DIR) {
const char *name = de->d_name;
/* always skip "." and ".." */
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
strcpy(dirpos, name);
//ALOGI("adding cache files from %s\n", tmpdir);
add_cache_files(cache, tmpdir, "cache");
} else {
ALOGW("Path exceeds limit: %s%s", tmpdir, name);
}
}
}
closedir(d);
}
// Collect cache files on external storage for all users (if it is mounted as part
// of the internal storage).
strcpy(tmpdir, android_media_dir.path);
dirpos = tmpdir + strlen(tmpdir);
d = opendir(tmpdir);
if (d != NULL) {
while ((de = readdir(d))) {
if (de->d_type == DT_DIR) {
const char *name = de->d_name;
/* skip any dir that doesn't start with a number, so not a user */
if (name[0] < '0' || name[0] > '9') {
continue;
}
if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
strcpy(dirpos, name);
if (lookup_media_dir(tmpdir, "Android") == 0
&& lookup_media_dir(tmpdir, "data") == 0) {
//ALOGI("adding cache files from %s\n", tmpdir);
add_cache_files(cache, tmpdir, "cache");
}
} else {
ALOGW("Path exceeds limit: %s%s", tmpdir, name);
}
}
}
closedir(d);
}
clear_cache_files(data_path, cache, free_size);
finish_cache_collection(cache);
return data_disk_free(data_path) >= free_size ? 0 : -1;
}
int rm_dex(const char *path, const char *instruction_set)
{
char dex_path[PKG_PATH_MAX];
if (validate_apk_path(path) && validate_system_app_path(path)) {
ALOGE("invalid apk path '%s' (bad prefix)\n", path);
return -1;
}
if (!create_cache_path(dex_path, path, instruction_set)) return -1;
ALOGV("unlink %s\n", dex_path);
if (unlink(dex_path) < 0) {
if (errno != ENOENT) {
ALOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno));
}
return -1;
} else {
return 0;
}
}
int get_app_size(const char *uuid, const char *pkgname, int userid, int flags,
const char *apkpath, const char *libdirpath, const char *fwdlock_apkpath,
const char *asecpath, const char *instruction_set, int64_t *_codesize, int64_t *_datasize,
int64_t *_cachesize, int64_t* _asecsize) {
DIR *d;
int dfd;
struct dirent *de;
struct stat s;
char path[PKG_PATH_MAX];
int64_t codesize = 0;
int64_t datasize = 0;
int64_t cachesize = 0;
int64_t asecsize = 0;
/* count the source apk as code -- but only if it's not
* on the /system partition and its not on the sdcard. */
if (validate_system_app_path(apkpath) &&
strncmp(apkpath, android_asec_dir.path, android_asec_dir.len) != 0) {
if (stat(apkpath, &s) == 0) {
codesize += stat_size(&s);
if (S_ISDIR(s.st_mode)) {
d = opendir(apkpath);
if (d != NULL) {
dfd = dirfd(d);
codesize += calculate_dir_size(dfd);
closedir(d);
}
}
}
}
/* count the forward locked apk as code if it is given */
if (fwdlock_apkpath != NULL && fwdlock_apkpath[0] != '!') {
if (stat(fwdlock_apkpath, &s) == 0) {
codesize += stat_size(&s);
}
}
/* count the cached dexfile as code */
if (create_cache_path(path, apkpath, instruction_set)) {
if (stat(path, &s) == 0) {
codesize += stat_size(&s);
}
}
/* add in size of any libraries */
if (libdirpath != NULL && libdirpath[0] != '!') {
d = opendir(libdirpath);
if (d != NULL) {
dfd = dirfd(d);
codesize += calculate_dir_size(dfd);
closedir(d);
}
}
/* compute asec size if it is given */
if (asecpath != NULL && asecpath[0] != '!') {
if (stat(asecpath, &s) == 0) {
asecsize += stat_size(&s);
}
}
std::vector<userid_t> users;
if (userid == -1) {
users = get_known_users(uuid);
} else {
users.push_back(userid);
}
for (auto user : users) {
// TODO: handle user_de directories
if (!(flags & FLAG_CE_STORAGE)) continue;
std::string _pkgdir(create_data_user_package_path(uuid, user, pkgname));
const char* pkgdir = _pkgdir.c_str();
d = opendir(pkgdir);
if (d == NULL) {
PLOG(WARNING) << "Failed to open " << pkgdir;
continue;
}
dfd = dirfd(d);
/* most stuff in the pkgdir is data, except for the "cache"
* directory and below, which is cache, and the "lib" directory
* and below, which is code...
*/
while ((de = readdir(d))) {
const char *name = de->d_name;
if (de->d_type == DT_DIR) {
int subfd;
int64_t statsize = 0;
int64_t dirsize = 0;
/* always skip "." and ".." */
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
statsize = stat_size(&s);
}
subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
if (subfd >= 0) {
dirsize = calculate_dir_size(subfd);
}
if(!strcmp(name,"lib")) {
codesize += dirsize + statsize;
} else if(!strcmp(name,"cache")) {
cachesize += dirsize + statsize;
} else {
datasize += dirsize + statsize;
}
} else if (de->d_type == DT_LNK && !strcmp(name,"lib")) {
// This is the symbolic link to the application's library
// code. We'll count this as code instead of data, since
// it is not something that the app creates.
if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
codesize += stat_size(&s);
}
} else {
if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
datasize += stat_size(&s);
}
}
}
closedir(d);
}
*_codesize = codesize;
*_datasize = datasize;
*_cachesize = cachesize;
*_asecsize = asecsize;
return 0;
}
static int split_count(const char *str)
{
char *ctx;
int count = 0;
char buf[kPropertyValueMax];
strncpy(buf, str, sizeof(buf));
char *pBuf = buf;
while(strtok_r(pBuf, " ", &ctx) != NULL) {
count++;
pBuf = NULL;
}
return count;
}
static int split(char *buf, const char **argv)
{
char *ctx;
int count = 0;
char *tok;
char *pBuf = buf;
while((tok = strtok_r(pBuf, " ", &ctx)) != NULL) {
argv[count++] = tok;
pBuf = NULL;
}
return count;
}
static void run_patchoat(int input_fd, int oat_fd, const char* input_file_name,
const char* output_file_name, const char *pkgname ATTRIBUTE_UNUSED, const char *instruction_set)
{
static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig
static const unsigned int MAX_INSTRUCTION_SET_LEN = 7;
static const char* PATCHOAT_BIN = "/system/bin/patchoat";
if (strlen(instruction_set) >= MAX_INSTRUCTION_SET_LEN) {
ALOGE("Instruction set %s longer than max length of %d",
instruction_set, MAX_INSTRUCTION_SET_LEN);
return;
}
/* input_file_name/input_fd should be the .odex/.oat file that is precompiled. I think*/
char instruction_set_arg[strlen("--instruction-set=") + MAX_INSTRUCTION_SET_LEN];
char output_oat_fd_arg[strlen("--output-oat-fd=") + MAX_INT_LEN];
char input_oat_fd_arg[strlen("--input-oat-fd=") + MAX_INT_LEN];
const char* patched_image_location_arg = "--patched-image-location=/system/framework/boot.art";
// The caller has already gotten all the locks we need.
const char* no_lock_arg = "--no-lock-output";
sprintf(instruction_set_arg, "--instruction-set=%s", instruction_set);
sprintf(output_oat_fd_arg, "--output-oat-fd=%d", oat_fd);
sprintf(input_oat_fd_arg, "--input-oat-fd=%d", input_fd);
ALOGV("Running %s isa=%s in-fd=%d (%s) out-fd=%d (%s)\n",
PATCHOAT_BIN, instruction_set, input_fd, input_file_name, oat_fd, output_file_name);
/* patchoat, patched-image-location, no-lock, isa, input-fd, output-fd */
char* argv[7];
argv[0] = (char*) PATCHOAT_BIN;
argv[1] = (char*) patched_image_location_arg;
argv[2] = (char*) no_lock_arg;
argv[3] = instruction_set_arg;
argv[4] = output_oat_fd_arg;
argv[5] = input_oat_fd_arg;
argv[6] = NULL;
execv(PATCHOAT_BIN, (char* const *)argv);
ALOGE("execv(%s) failed: %s\n", PATCHOAT_BIN, strerror(errno));
}
static bool check_boolean_property(const char* property_name, bool default_value = false) {
char tmp_property_value[kPropertyValueMax];
bool have_property = get_property(property_name, tmp_property_value, nullptr) > 0;
if (!have_property) {
return default_value;
}
return strcmp(tmp_property_value, "true") == 0;
}
static void run_dex2oat(int zip_fd, int oat_fd, const char* input_file_name,
const char* output_file_name, int swap_fd, const char *instruction_set,
bool vm_safe_mode, bool debuggable, bool post_bootcomplete, bool extract_only,
const std::vector<int>& profile_files_fd, const std::vector<int>& reference_profile_files_fd) {
static const unsigned int MAX_INSTRUCTION_SET_LEN = 7;
if (strlen(instruction_set) >= MAX_INSTRUCTION_SET_LEN) {
ALOGE("Instruction set %s longer than max length of %d",
instruction_set, MAX_INSTRUCTION_SET_LEN);
return;
}
if (profile_files_fd.size() != reference_profile_files_fd.size()) {
ALOGE("Invalid configuration of profile files: pf_size (%zu) != rpf_size (%zu)",
profile_files_fd.size(), reference_profile_files_fd.size());
return;
}
char dex2oat_Xms_flag[kPropertyValueMax];
bool have_dex2oat_Xms_flag = get_property("dalvik.vm.dex2oat-Xms", dex2oat_Xms_flag, NULL) > 0;
char dex2oat_Xmx_flag[kPropertyValueMax];
bool have_dex2oat_Xmx_flag = get_property("dalvik.vm.dex2oat-Xmx", dex2oat_Xmx_flag, NULL) > 0;
char dex2oat_compiler_filter_flag[kPropertyValueMax];
bool have_dex2oat_compiler_filter_flag = get_property("dalvik.vm.dex2oat-filter",
dex2oat_compiler_filter_flag, NULL) > 0;
char dex2oat_threads_buf[kPropertyValueMax];
bool have_dex2oat_threads_flag = get_property(post_bootcomplete
? "dalvik.vm.dex2oat-threads"
: "dalvik.vm.boot-dex2oat-threads",
dex2oat_threads_buf,
NULL) > 0;
char dex2oat_threads_arg[kPropertyValueMax + 2];
if (have_dex2oat_threads_flag) {
sprintf(dex2oat_threads_arg, "-j%s", dex2oat_threads_buf);
}
char dex2oat_isa_features_key[kPropertyKeyMax];
sprintf(dex2oat_isa_features_key, "dalvik.vm.isa.%s.features", instruction_set);
char dex2oat_isa_features[kPropertyValueMax];
bool have_dex2oat_isa_features = get_property(dex2oat_isa_features_key,
dex2oat_isa_features, NULL) > 0;
char dex2oat_isa_variant_key[kPropertyKeyMax];
sprintf(dex2oat_isa_variant_key, "dalvik.vm.isa.%s.variant", instruction_set);
char dex2oat_isa_variant[kPropertyValueMax];
bool have_dex2oat_isa_variant = get_property(dex2oat_isa_variant_key,
dex2oat_isa_variant, NULL) > 0;
const char *dex2oat_norelocation = "-Xnorelocate";
bool have_dex2oat_relocation_skip_flag = false;
char dex2oat_flags[kPropertyValueMax];
int dex2oat_flags_count = get_property("dalvik.vm.dex2oat-flags",
dex2oat_flags, NULL) <= 0 ? 0 : split_count(dex2oat_flags);
ALOGV("dalvik.vm.dex2oat-flags=%s\n", dex2oat_flags);
// If we booting without the real /data, don't spend time compiling.
char vold_decrypt[kPropertyValueMax];
bool have_vold_decrypt = get_property("vold.decrypt", vold_decrypt, "") > 0;
bool skip_compilation = (have_vold_decrypt &&
(strcmp(vold_decrypt, "trigger_restart_min_framework") == 0 ||
(strcmp(vold_decrypt, "1") == 0)));
bool generate_debug_info = check_boolean_property("debug.generate-debug-info");
static const char* DEX2OAT_BIN = "/system/bin/dex2oat";
static const char* RUNTIME_ARG = "--runtime-arg";
static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig
char zip_fd_arg[strlen("--zip-fd=") + MAX_INT_LEN];
char zip_location_arg[strlen("--zip-location=") + PKG_PATH_MAX];
char oat_fd_arg[strlen("--oat-fd=") + MAX_INT_LEN];
char oat_location_arg[strlen("--oat-location=") + PKG_PATH_MAX];
char instruction_set_arg[strlen("--instruction-set=") + MAX_INSTRUCTION_SET_LEN];
char instruction_set_variant_arg[strlen("--instruction-set-variant=") + kPropertyValueMax];
char instruction_set_features_arg[strlen("--instruction-set-features=") + kPropertyValueMax];
char dex2oat_Xms_arg[strlen("-Xms") + kPropertyValueMax];
char dex2oat_Xmx_arg[strlen("-Xmx") + kPropertyValueMax];
char dex2oat_compiler_filter_arg[strlen("--compiler-filter=") + kPropertyValueMax];
bool have_dex2oat_swap_fd = false;
char dex2oat_swap_fd[strlen("--swap-fd=") + MAX_INT_LEN];
sprintf(zip_fd_arg, "--zip-fd=%d", zip_fd);
sprintf(zip_location_arg, "--zip-location=%s", input_file_name);
sprintf(oat_fd_arg, "--oat-fd=%d", oat_fd);
sprintf(oat_location_arg, "--oat-location=%s", output_file_name);
sprintf(instruction_set_arg, "--instruction-set=%s", instruction_set);
sprintf(instruction_set_variant_arg, "--instruction-set-variant=%s", dex2oat_isa_variant);
sprintf(instruction_set_features_arg, "--instruction-set-features=%s", dex2oat_isa_features);
if (swap_fd >= 0) {
have_dex2oat_swap_fd = true;
sprintf(dex2oat_swap_fd, "--swap-fd=%d", swap_fd);
}
if (have_dex2oat_Xms_flag) {
sprintf(dex2oat_Xms_arg, "-Xms%s", dex2oat_Xms_flag);
}
if (have_dex2oat_Xmx_flag) {
sprintf(dex2oat_Xmx_arg, "-Xmx%s", dex2oat_Xmx_flag);
}
if (skip_compilation) {
strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=verify-none");
have_dex2oat_compiler_filter_flag = true;
have_dex2oat_relocation_skip_flag = true;
} else if (vm_safe_mode) {
strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=interpret-only");
have_dex2oat_compiler_filter_flag = true;
} else if (extract_only) {
strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=verify-at-runtime");
have_dex2oat_compiler_filter_flag = true;
} else if (have_dex2oat_compiler_filter_flag) {
sprintf(dex2oat_compiler_filter_arg, "--compiler-filter=%s", dex2oat_compiler_filter_flag);
}
// Check whether all apps should be compiled debuggable.
if (!debuggable) {
char prop_buf[kPropertyValueMax];
debuggable =
(get_property("dalvik.vm.always_debuggable", prop_buf, "0") > 0) &&
(prop_buf[0] == '1');
}
std::vector<std::string> profile_file_args(profile_files_fd.size());
std::vector<std::string> reference_profile_file_args(profile_files_fd.size());
// "reference-profile-file-fd" is longer than "profile-file-fd" so we can
// use it to set the max length.
char profile_buf[strlen("--reference-profile-file-fd=") + MAX_INT_LEN];
for (size_t k = 0; k < profile_files_fd.size(); k++) {
sprintf(profile_buf, "--profile-file-fd=%d", profile_files_fd[k]);
profile_file_args[k].assign(profile_buf);
sprintf(profile_buf, "--reference-profile-file-fd=%d", reference_profile_files_fd[k]);
reference_profile_file_args[k].assign(profile_buf);
}
ALOGV("Running %s in=%s out=%s\n", DEX2OAT_BIN, input_file_name, output_file_name);
const char* argv[7 // program name, mandatory arguments and the final NULL
+ (have_dex2oat_isa_variant ? 1 : 0)
+ (have_dex2oat_isa_features ? 1 : 0)
+ (have_dex2oat_Xms_flag ? 2 : 0)
+ (have_dex2oat_Xmx_flag ? 2 : 0)
+ (have_dex2oat_compiler_filter_flag ? 1 : 0)
+ (have_dex2oat_threads_flag ? 1 : 0)
+ (have_dex2oat_swap_fd ? 1 : 0)
+ (have_dex2oat_relocation_skip_flag ? 2 : 0)
+ (generate_debug_info ? 1 : 0)
+ (debuggable ? 1 : 0)
+ dex2oat_flags_count
+ profile_files_fd.size()
+ reference_profile_files_fd.size()];
int i = 0;
argv[i++] = DEX2OAT_BIN;
argv[i++] = zip_fd_arg;
argv[i++] = zip_location_arg;
argv[i++] = oat_fd_arg;
argv[i++] = oat_location_arg;
argv[i++] = instruction_set_arg;
if (have_dex2oat_isa_variant) {
argv[i++] = instruction_set_variant_arg;
}
if (have_dex2oat_isa_features) {
argv[i++] = instruction_set_features_arg;
}
if (have_dex2oat_Xms_flag) {
argv[i++] = RUNTIME_ARG;
argv[i++] = dex2oat_Xms_arg;
}
if (have_dex2oat_Xmx_flag) {
argv[i++] = RUNTIME_ARG;
argv[i++] = dex2oat_Xmx_arg;
}
if (have_dex2oat_compiler_filter_flag) {
argv[i++] = dex2oat_compiler_filter_arg;
}
if (have_dex2oat_threads_flag) {
argv[i++] = dex2oat_threads_arg;
}
if (have_dex2oat_swap_fd) {
argv[i++] = dex2oat_swap_fd;
}
if (generate_debug_info) {
argv[i++] = "--generate-debug-info";
}
if (debuggable) {
argv[i++] = "--debuggable";
}
if (dex2oat_flags_count) {
i += split(dex2oat_flags, argv + i);
}
if (have_dex2oat_relocation_skip_flag) {
argv[i++] = RUNTIME_ARG;
argv[i++] = dex2oat_norelocation;
}
for (size_t k = 0; k < profile_file_args.size(); k++) {
argv[i++] = profile_file_args[k].c_str();
argv[i++] = reference_profile_file_args[k].c_str();
}
// Do not add after dex2oat_flags, they should override others for debugging.
argv[i] = NULL;
execv(DEX2OAT_BIN, (char * const *)argv);
ALOGE("execv(%s) failed: %s\n", DEX2OAT_BIN, strerror(errno));
}
/*
* Whether dexopt should use a swap file when compiling an APK.
*
* If kAlwaysProvideSwapFile, do this on all devices (dex2oat will make a more informed decision
* itself, anyways).
*
* Otherwise, read "dalvik.vm.dex2oat-swap". If the property exists, return whether it is "true".
*
* Otherwise, return true if this is a low-mem device.
*
* Otherwise, return default value.
*/
static bool kAlwaysProvideSwapFile = false;
static bool kDefaultProvideSwapFile = true;
static bool ShouldUseSwapFileForDexopt() {
if (kAlwaysProvideSwapFile) {
return true;
}
// Check the "override" property. If it exists, return value == "true".
char dex2oat_prop_buf[kPropertyValueMax];
if (get_property("dalvik.vm.dex2oat-swap", dex2oat_prop_buf, "") > 0) {
if (strcmp(dex2oat_prop_buf, "true") == 0) {
return true;
} else {
return false;
}
}
// Shortcut for default value. This is an implementation optimization for the process sketched
// above. If the default value is true, we can avoid to check whether this is a low-mem device,
// as low-mem is never returning false. The compiler will optimize this away if it can.
if (kDefaultProvideSwapFile) {
return true;
}
bool is_low_mem = check_boolean_property("ro.config.low_ram");
if (is_low_mem) {
return true;
}
// Default value must be false here.
return kDefaultProvideSwapFile;
}
static void SetDex2OatAndPatchOatScheduling(bool set_to_bg) {
if (set_to_bg) {
if (set_sched_policy(0, SP_BACKGROUND) < 0) {
ALOGE("set_sched_policy failed: %s\n", strerror(errno));
exit(70);
}
if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) {
ALOGE("setpriority failed: %s\n", strerror(errno));
exit(71);
}
}
}
constexpr const char* PROFILE_FILE_EXTENSION = ".prof";
constexpr const char* REFERENCE_PROFILE_FILE_EXTENSION = ".prof.ref";
static void close_all_fds(const std::vector<int>& fds, const char* description) {
for (size_t i = 0; i < fds.size(); i++) {
if (close(fds[i]) != 0) {
PLOG(WARNING) << "Failed to close fd for " << description << " at index " << i;
}
}
}
static int open_code_cache_for_user(userid_t user, const char* volume_uuid, const char* pkgname) {
std::string code_cache_path =
create_data_user_package_path(volume_uuid, user, pkgname) + CODE_CACHE_DIR_POSTFIX;
struct stat buffer;
// Check that the code cache exists. If not, return and don't log an error.
if (TEMP_FAILURE_RETRY(lstat(code_cache_path.c_str(), &buffer)) == -1) {
if (errno != ENOENT) {
PLOG(ERROR) << "Failed to lstat code_cache: " << code_cache_path;
return -1;
}
}
int code_cache_fd = open(code_cache_path.c_str(),
O_PATH | O_CLOEXEC | O_DIRECTORY | O_NOFOLLOW);
if (code_cache_fd < 0) {
PLOG(ERROR) << "Failed to open code_cache: " << code_cache_path;
}
return code_cache_fd;
}
// Keep profile paths in sync with ActivityThread.
static void open_profile_files_for_user(uid_t uid, const char* pkgname, int code_cache_fd,
/*out*/ int* profile_fd, /*out*/ int* reference_profile_fd) {
*profile_fd = -1;
*reference_profile_fd = -1;
std::string profile_file(pkgname);
profile_file += PROFILE_FILE_EXTENSION;
// Check if the profile exists. If not, early return and don't log an error.
struct stat buffer;
if (TEMP_FAILURE_RETRY(fstatat(
code_cache_fd, profile_file.c_str(), &buffer, AT_SYMLINK_NOFOLLOW)) == -1) {
if (errno != ENOENT) {
PLOG(ERROR) << "Failed to fstatat profile file: " << profile_file;
return;
}
}
// Open in read-write to allow transfer of information from the current profile
// to the reference profile.
*profile_fd = openat(code_cache_fd, profile_file.c_str(), O_RDWR | O_NOFOLLOW);
if (*profile_fd < 0) {
PLOG(ERROR) << "Failed to open profile file: " << profile_file;
return;
}
std::string reference_profile(pkgname);
reference_profile += REFERENCE_PROFILE_FILE_EXTENSION;
// Give read-write permissions just for the user (changed with fchown after opening).
// We need write permission because dex2oat will update the reference profile files
// with the content of the corresponding current profile files.
*reference_profile_fd = openat(code_cache_fd, reference_profile.c_str(),
O_CREAT | O_RDWR | O_NOFOLLOW, S_IWUSR | S_IRUSR);
if (*reference_profile_fd < 0) {
close(*profile_fd);
return;
}
if (fchown(*reference_profile_fd, uid, uid) < 0) {
PLOG(ERROR) << "Cannot change reference profile file owner: " << reference_profile;
close(*profile_fd);
*profile_fd = -1;
*reference_profile_fd = -1;
}
}
static void open_profile_files(const char* volume_uuid, uid_t uid, const char* pkgname,
std::vector<int>* profile_fds, std::vector<int>* reference_profile_fds) {
std::vector<userid_t> users = get_known_users(volume_uuid);
for (auto user : users) {
int code_cache_fd = open_code_cache_for_user(user, volume_uuid, pkgname);
if (code_cache_fd < 0) {
continue;
}
int profile_fd = -1;
int reference_profile_fd = -1;
open_profile_files_for_user(
uid, pkgname, code_cache_fd, &profile_fd, &reference_profile_fd);
close(code_cache_fd);
// Add to the lists only if both fds are valid.
if ((profile_fd >= 0) && (reference_profile_fd >= 0)) {
profile_fds->push_back(profile_fd);
reference_profile_fds->push_back(reference_profile_fd);
}
}
}
int dexopt(const char* apk_path, uid_t uid, const char* pkgname, const char* instruction_set,
int dexopt_needed, const char* oat_dir, int dexopt_flags, const char* volume_uuid,
bool use_profiles)
{
struct utimbuf ut;
struct stat input_stat;
char out_path[PKG_PATH_MAX];
char swap_file_name[PKG_PATH_MAX];
const char *input_file;
char in_odex_path[PKG_PATH_MAX];
int res, input_fd=-1, out_fd=-1, swap_fd=-1;
bool is_public = (dexopt_flags & DEXOPT_PUBLIC) != 0;
bool vm_safe_mode = (dexopt_flags & DEXOPT_SAFEMODE) != 0;
bool debuggable = (dexopt_flags & DEXOPT_DEBUGGABLE) != 0;
bool boot_complete = (dexopt_flags & DEXOPT_BOOTCOMPLETE) != 0;
bool extract_only = (dexopt_flags & DEXOPT_EXTRACTONLY) != 0;
std::vector<int> profile_files_fd;
std::vector<int> reference_profile_files_fd;
if (use_profiles) {
open_profile_files(volume_uuid, uid, pkgname,
&profile_files_fd, &reference_profile_files_fd);
if (profile_files_fd.empty()) {
// Skip profile guided compilation because no profiles were found.
return 0;
}
}
if ((dexopt_flags & ~DEXOPT_MASK) != 0) {
LOG_FATAL("dexopt flags contains unknown fields\n");
}
// Early best-effort check whether we can fit the the path into our buffers.
// Note: the cache path will require an additional 5 bytes for ".swap", but we'll try to run
// without a swap file, if necessary.
if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) {
ALOGE("apk_path too long '%s'\n", apk_path);
return -1;
}
if (oat_dir != NULL && oat_dir[0] != '!') {
if (validate_apk_path(oat_dir)) {
ALOGE("invalid oat_dir '%s'\n", oat_dir);
return -1;
}
if (!calculate_oat_file_path(out_path, oat_dir, apk_path, instruction_set)) {
return -1;
}
} else {
if (!create_cache_path(out_path, apk_path, instruction_set)) {
return -1;
}
}
switch (dexopt_needed) {
case DEXOPT_DEX2OAT_NEEDED:
input_file = apk_path;
break;
case DEXOPT_PATCHOAT_NEEDED:
if (!calculate_odex_file_path(in_odex_path, apk_path, instruction_set)) {
return -1;
}
input_file = in_odex_path;
break;
case DEXOPT_SELF_PATCHOAT_NEEDED:
input_file = out_path;
break;
default:
ALOGE("Invalid dexopt needed: %d\n", dexopt_needed);
exit(72);
}
memset(&input_stat, 0, sizeof(input_stat));
stat(input_file, &input_stat);
input_fd = open(input_file, O_RDONLY, 0);
if (input_fd < 0) {
ALOGE("installd cannot open '%s' for input during dexopt\n", input_file);
return -1;
}
unlink(out_path);
out_fd = open(out_path, O_RDWR | O_CREAT | O_EXCL, 0644);
if (out_fd < 0) {
ALOGE("installd cannot open '%s' for output during dexopt\n", out_path);
goto fail;
}
if (fchmod(out_fd,
S_IRUSR|S_IWUSR|S_IRGRP |
(is_public ? S_IROTH : 0)) < 0) {
ALOGE("installd cannot chmod '%s' during dexopt\n", out_path);
goto fail;
}
if (fchown(out_fd, AID_SYSTEM, uid) < 0) {
ALOGE("installd cannot chown '%s' during dexopt\n", out_path);
goto fail;
}
// Create a swap file if necessary.
if (ShouldUseSwapFileForDexopt()) {
// Make sure there really is enough space.
size_t out_len = strlen(out_path);
if (out_len + strlen(".swap") + 1 <= PKG_PATH_MAX) {
strcpy(swap_file_name, out_path);
strcpy(swap_file_name + strlen(out_path), ".swap");
unlink(swap_file_name);
swap_fd = open(swap_file_name, O_RDWR | O_CREAT | O_EXCL, 0600);
if (swap_fd < 0) {
// Could not create swap file. Optimistically go on and hope that we can compile
// without it.
ALOGE("installd could not create '%s' for swap during dexopt\n", swap_file_name);
} else {
// Immediately unlink. We don't really want to hit flash.
unlink(swap_file_name);
}
} else {
// Swap file path is too long. Try to run without.
ALOGE("installd could not create swap file for path %s during dexopt\n", out_path);
}
}
ALOGV("DexInv: --- BEGIN '%s' ---\n", input_file);
pid_t pid;
pid = fork();
if (pid == 0) {
/* child -- drop privileges before continuing */
if (setgid(uid) != 0) {
ALOGE("setgid(%d) failed in installd during dexopt\n", uid);
exit(64);
}
if (setuid(uid) != 0) {
ALOGE("setuid(%d) failed in installd during dexopt\n", uid);
exit(65);
}
// drop capabilities
struct __user_cap_header_struct capheader;
struct __user_cap_data_struct capdata[2];
memset(&capheader, 0, sizeof(capheader));
memset(&capdata, 0, sizeof(capdata));
capheader.version = _LINUX_CAPABILITY_VERSION_3;
if (capset(&capheader, &capdata[0]) < 0) {
ALOGE("capset failed: %s\n", strerror(errno));
exit(66);
}
SetDex2OatAndPatchOatScheduling(boot_complete);
if (flock(out_fd, LOCK_EX | LOCK_NB) != 0) {
ALOGE("flock(%s) failed: %s\n", out_path, strerror(errno));
exit(67);
}
if (dexopt_needed == DEXOPT_PATCHOAT_NEEDED
|| dexopt_needed == DEXOPT_SELF_PATCHOAT_NEEDED) {
run_patchoat(input_fd, out_fd, input_file, out_path, pkgname, instruction_set);
} else if (dexopt_needed == DEXOPT_DEX2OAT_NEEDED) {
run_dex2oat(input_fd, out_fd, input_file, out_path, swap_fd,
instruction_set, vm_safe_mode, debuggable, boot_complete, extract_only,
profile_files_fd, reference_profile_files_fd);
} else {
ALOGE("Invalid dexopt needed: %d\n", dexopt_needed);
exit(73);
}
exit(68); /* only get here on exec failure */
} else {
res = wait_child(pid);
if (res == 0) {
ALOGV("DexInv: --- END '%s' (success) ---\n", input_file);
} else {
ALOGE("DexInv: --- END '%s' --- status=0x%04x, process failed\n", input_file, res);
goto fail;
}
}
ut.actime = input_stat.st_atime;
ut.modtime = input_stat.st_mtime;
utime(out_path, &ut);
close(out_fd);
close(input_fd);
if (swap_fd != -1) {
close(swap_fd);
}
if (use_profiles != 0) {
close_all_fds(profile_files_fd, "profile_files_fd");
close_all_fds(reference_profile_files_fd, "reference_profile_files_fd");
}
return 0;
fail:
if (out_fd >= 0) {
close(out_fd);
unlink(out_path);
}
if (input_fd >= 0) {
close(input_fd);
}
if (use_profiles != 0) {
close_all_fds(profile_files_fd, "profile_files_fd");
close_all_fds(reference_profile_files_fd, "reference_profile_files_fd");
}
return -1;
}
int mark_boot_complete(const char* instruction_set)
{
char boot_marker_path[PKG_PATH_MAX];
sprintf(boot_marker_path,
"%s/%s/%s/.booting",
android_data_dir.path,
DALVIK_CACHE,
instruction_set);
ALOGV("mark_boot_complete : %s", boot_marker_path);
if (unlink(boot_marker_path) != 0) {
ALOGE("Unable to unlink boot marker at %s, error=%s", boot_marker_path,
strerror(errno));
return -1;
}
return 0;
}
void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid,
struct stat* statbuf)
{
while (path[basepos] != 0) {
if (path[basepos] == '/') {
path[basepos] = 0;
if (lstat(path, statbuf) < 0) {
ALOGV("Making directory: %s\n", path);
if (mkdir(path, mode) == 0) {
chown(path, uid, gid);
} else {
ALOGW("Unable to make directory %s: %s\n", path, strerror(errno));
}
}
path[basepos] = '/';
basepos++;
}
basepos++;
}
}
int movefileordir(char* srcpath, char* dstpath, int dstbasepos,
int dstuid, int dstgid, struct stat* statbuf)
{
DIR *d;
struct dirent *de;
int res;
int srcend = strlen(srcpath);
int dstend = strlen(dstpath);
if (lstat(srcpath, statbuf) < 0) {
ALOGW("Unable to stat %s: %s\n", srcpath, strerror(errno));
return 1;
}
if ((statbuf->st_mode&S_IFDIR) == 0) {
mkinnerdirs(dstpath, dstbasepos, S_IRWXU|S_IRWXG|S_IXOTH,
dstuid, dstgid, statbuf);
ALOGV("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid);
if (rename(srcpath, dstpath) >= 0) {
if (chown(dstpath, dstuid, dstgid) < 0) {
ALOGE("cannot chown %s: %s\n", dstpath, strerror(errno));
unlink(dstpath);
return 1;
}
} else {
ALOGW("Unable to rename %s to %s: %s\n",
srcpath, dstpath, strerror(errno));
return 1;
}
return 0;
}
d = opendir(srcpath);
if (d == NULL) {
ALOGW("Unable to opendir %s: %s\n", srcpath, strerror(errno));
return 1;
}
res = 0;
while ((de = readdir(d))) {
const char *name = de->d_name;
/* always skip "." and ".." */
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
if ((srcend+strlen(name)) >= (PKG_PATH_MAX-2)) {
ALOGW("Source path too long; skipping: %s/%s\n", srcpath, name);
continue;
}
if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) {
ALOGW("Destination path too long; skipping: %s/%s\n", dstpath, name);
continue;
}
srcpath[srcend] = dstpath[dstend] = '/';
strcpy(srcpath+srcend+1, name);
strcpy(dstpath+dstend+1, name);
if (movefileordir(srcpath, dstpath, dstbasepos, dstuid, dstgid, statbuf) != 0) {
res = 1;
}
// Note: we will be leaving empty directories behind in srcpath,
// but that is okay, the package manager will be erasing all of the
// data associated with .apks that disappear.
srcpath[srcend] = dstpath[dstend] = 0;
}
closedir(d);
return res;
}
int movefiles()
{
DIR *d;
int dfd, subfd;
struct dirent *de;
struct stat s;
char buf[PKG_PATH_MAX+1];
int bufp, bufe, bufi, readlen;
char srcpkg[PKG_NAME_MAX];
char dstpkg[PKG_NAME_MAX];
char srcpath[PKG_PATH_MAX];
char dstpath[PKG_PATH_MAX];
int dstuid=-1, dstgid=-1;
int hasspace;
d = opendir(UPDATE_COMMANDS_DIR_PREFIX);
if (d == NULL) {
goto done;
}
dfd = dirfd(d);
/* Iterate through all files in the directory, executing the
* file movements requested there-in.
*/
while ((de = readdir(d))) {
const char *name = de->d_name;
if (de->d_type == DT_DIR) {
continue;
} else {
subfd = openat(dfd, name, O_RDONLY);
if (subfd < 0) {
ALOGW("Unable to open update commands at %s%s\n",
UPDATE_COMMANDS_DIR_PREFIX, name);
continue;
}
bufp = 0;
bufe = 0;
buf[PKG_PATH_MAX] = 0;
srcpkg[0] = dstpkg[0] = 0;
while (1) {
bufi = bufp;
while (bufi < bufe && buf[bufi] != '\n') {
bufi++;
}
if (bufi < bufe) {
buf[bufi] = 0;
ALOGV("Processing line: %s\n", buf+bufp);
hasspace = 0;
while (bufp < bufi && isspace(buf[bufp])) {
hasspace = 1;
bufp++;
}
if (buf[bufp] == '#' || bufp == bufi) {
// skip comments and empty lines.
} else if (hasspace) {
if (dstpkg[0] == 0) {
ALOGW("Path before package line in %s%s: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
} else if (srcpkg[0] == 0) {
// Skip -- source package no longer exists.
} else {
ALOGV("Move file: %s (from %s to %s)\n", buf+bufp, srcpkg, dstpkg);
if (!create_move_path(srcpath, srcpkg, buf+bufp, 0) &&
!create_move_path(dstpath, dstpkg, buf+bufp, 0)) {
movefileordir(srcpath, dstpath,
strlen(dstpath)-strlen(buf+bufp),
dstuid, dstgid, &s);
}
}
} else {
char* div = strchr(buf+bufp, ':');
if (div == NULL) {
ALOGW("Bad package spec in %s%s; no ':' sep: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
} else {
*div = 0;
div++;
if (strlen(buf+bufp) < PKG_NAME_MAX) {
strcpy(dstpkg, buf+bufp);
} else {
srcpkg[0] = dstpkg[0] = 0;
ALOGW("Package name too long in %s%s: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
}
if (strlen(div) < PKG_NAME_MAX) {
strcpy(srcpkg, div);
} else {
srcpkg[0] = dstpkg[0] = 0;
ALOGW("Package name too long in %s%s: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, div);
}
if (srcpkg[0] != 0) {
if (!create_pkg_path(srcpath, srcpkg, PKG_DIR_POSTFIX, 0)) {
if (lstat(srcpath, &s) < 0) {
// Package no longer exists -- skip.
srcpkg[0] = 0;
}
} else {
srcpkg[0] = 0;
ALOGW("Can't create path %s in %s%s\n",
div, UPDATE_COMMANDS_DIR_PREFIX, name);
}
if (srcpkg[0] != 0) {
if (!create_pkg_path(dstpath, dstpkg, PKG_DIR_POSTFIX, 0)) {
if (lstat(dstpath, &s) == 0) {
dstuid = s.st_uid;
dstgid = s.st_gid;
} else {
// Destination package doesn't
// exist... due to original-package,
// this is normal, so don't be
// noisy about it.
srcpkg[0] = 0;
}
} else {
srcpkg[0] = 0;
ALOGW("Can't create path %s in %s%s\n",
div, UPDATE_COMMANDS_DIR_PREFIX, name);
}
}
ALOGV("Transfering from %s to %s: uid=%d\n",
srcpkg, dstpkg, dstuid);
}
}
}
bufp = bufi+1;
} else {
if (bufp == 0) {
if (bufp < bufe) {
ALOGW("Line too long in %s%s, skipping: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, buf);
}
} else if (bufp < bufe) {
memcpy(buf, buf+bufp, bufe-bufp);
bufe -= bufp;
bufp = 0;
}
readlen = read(subfd, buf+bufe, PKG_PATH_MAX-bufe);
if (readlen < 0) {
ALOGW("Failure reading update commands in %s%s: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, strerror(errno));
break;
} else if (readlen == 0) {
break;
}
bufe += readlen;
buf[bufe] = 0;
ALOGV("Read buf: %s\n", buf);
}
}
close(subfd);
}
}
closedir(d);
done:
return 0;
}
int linklib(const char* uuid, const char* pkgname, const char* asecLibDir, int userId)
{
struct stat s, libStat;
int rc = 0;
std::string _pkgdir(create_data_user_package_path(uuid, userId, pkgname));
std::string _libsymlink(_pkgdir + PKG_LIB_POSTFIX);
const char* pkgdir = _pkgdir.c_str();
const char* libsymlink = _libsymlink.c_str();
if (stat(pkgdir, &s) < 0) return -1;
if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) {
ALOGE("failed to chown '%s': %s\n", pkgdir, strerror(errno));
return -1;
}
if (chmod(pkgdir, 0700) < 0) {
ALOGE("linklib() 1: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
rc = -1;
goto out;
}
if (lstat(libsymlink, &libStat) < 0) {
if (errno != ENOENT) {
ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
rc = -1;
goto out;
}
} else {
if (S_ISDIR(libStat.st_mode)) {
if (delete_dir_contents(libsymlink, 1, NULL) < 0) {
rc = -1;
goto out;
}
} else if (S_ISLNK(libStat.st_mode)) {
if (unlink(libsymlink) < 0) {
ALOGE("couldn't unlink lib dir: %s\n", strerror(errno));
rc = -1;
goto out;
}
}
}
if (symlink(asecLibDir, libsymlink) < 0) {
ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, asecLibDir,
strerror(errno));
rc = -errno;
goto out;
}
out:
if (chmod(pkgdir, s.st_mode) < 0) {
ALOGE("linklib() 2: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
rc = -errno;
}
if (chown(pkgdir, s.st_uid, s.st_gid) < 0) {
ALOGE("failed to chown '%s' : %s\n", pkgdir, strerror(errno));
return -errno;
}
return rc;
}
static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd)
{
static const char *IDMAP_BIN = "/system/bin/idmap";
static const size_t MAX_INT_LEN = 32;
char idmap_str[MAX_INT_LEN];
snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd);
execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL);
ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno));
}
// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix)
// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap
static int flatten_path(const char *prefix, const char *suffix,
const char *overlay_path, char *idmap_path, size_t N)
{
if (overlay_path == NULL || idmap_path == NULL) {
return -1;
}
const size_t len_overlay_path = strlen(overlay_path);
// will access overlay_path + 1 further below; requires absolute path
if (len_overlay_path < 2 || *overlay_path != '/') {
return -1;
}
const size_t len_idmap_root = strlen(prefix);
const size_t len_suffix = strlen(suffix);
if (SIZE_MAX - len_idmap_root < len_overlay_path ||
SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) {
// additions below would cause overflow
return -1;
}
if (N < len_idmap_root + len_overlay_path + len_suffix) {
return -1;
}
memset(idmap_path, 0, N);
snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix);
char *ch = idmap_path + len_idmap_root;
while (*ch != '\0') {
if (*ch == '/') {
*ch = '@';
}
++ch;
}
return 0;
}
int idmap(const char *target_apk, const char *overlay_apk, uid_t uid)
{
ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid);
int idmap_fd = -1;
char idmap_path[PATH_MAX];
if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk,
idmap_path, sizeof(idmap_path)) == -1) {
ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk);
goto fail;
}
unlink(idmap_path);
idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644);
if (idmap_fd < 0) {
ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno));
goto fail;
}
if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) {
ALOGE("idmap cannot chown '%s'\n", idmap_path);
goto fail;
}
if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) {
ALOGE("idmap cannot chmod '%s'\n", idmap_path);
goto fail;
}
pid_t pid;
pid = fork();
if (pid == 0) {
/* child -- drop privileges before continuing */
if (setgid(uid) != 0) {
ALOGE("setgid(%d) failed during idmap\n", uid);
exit(1);
}
if (setuid(uid) != 0) {
ALOGE("setuid(%d) failed during idmap\n", uid);
exit(1);
}
if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) {
ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno));
exit(1);
}
run_idmap(target_apk, overlay_apk, idmap_fd);
exit(1); /* only if exec call to idmap failed */
} else {
int status = wait_child(pid);
if (status != 0) {
ALOGE("idmap failed, status=0x%04x\n", status);
goto fail;
}
}
close(idmap_fd);
return 0;
fail:
if (idmap_fd >= 0) {
close(idmap_fd);
unlink(idmap_path);
}
return -1;
}
int restorecon_app_data(const char* uuid, const char* pkgName, userid_t userid, int flags,
appid_t appid, const char* seinfo) {
int res = 0;
// SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here.
unsigned int seflags = SELINUX_ANDROID_RESTORECON_RECURSE;
if (!pkgName || !seinfo) {
ALOGE("Package name or seinfo tag is null when trying to restorecon.");
return -1;
}
uid_t uid = multiuser_get_uid(userid, appid);
if (flags & FLAG_CE_STORAGE) {
auto path = create_data_user_package_path(uuid, userid, pkgName);
if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) {
PLOG(ERROR) << "restorecon failed for " << path;
res = -1;
}
}
if (flags & FLAG_DE_STORAGE) {
auto path = create_data_user_de_package_path(uuid, userid, pkgName);
if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, seflags) < 0) {
PLOG(ERROR) << "restorecon failed for " << path;
// TODO: include result once 25796509 is fixed
}
}
return res;
}
int create_oat_dir(const char* oat_dir, const char* instruction_set)
{
char oat_instr_dir[PKG_PATH_MAX];
if (validate_apk_path(oat_dir)) {
ALOGE("invalid apk path '%s' (bad prefix)\n", oat_dir);
return -1;
}
if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) {
return -1;
}
if (selinux_android_restorecon(oat_dir, 0)) {
ALOGE("cannot restorecon dir '%s': %s\n", oat_dir, strerror(errno));
return -1;
}
snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set);
if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) {
return -1;
}
return 0;
}
int rm_package_dir(const char* apk_path)
{
if (validate_apk_path(apk_path)) {
ALOGE("invalid apk path '%s' (bad prefix)\n", apk_path);
return -1;
}
return delete_dir_contents(apk_path, 1 /* also_delete_dir */ , NULL /* exclusion_predicate */);
}
int link_file(const char* relative_path, const char* from_base, const char* to_base) {
char from_path[PKG_PATH_MAX];
char to_path[PKG_PATH_MAX];
snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path);
snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path);
if (validate_apk_path_subdirs(from_path)) {
ALOGE("invalid app data sub-path '%s' (bad prefix)\n", from_path);
return -1;
}
if (validate_apk_path_subdirs(to_path)) {
ALOGE("invalid app data sub-path '%s' (bad prefix)\n", to_path);
return -1;
}
const int ret = link(from_path, to_path);
if (ret < 0) {
ALOGE("link(%s, %s) failed : %s", from_path, to_path, strerror(errno));
return -1;
}
return 0;
}
} // namespace installd
} // namespace android