/* ** 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 "installd.h" #include #include #include #include #include #include #include #include #include #include #include using android::base::StringPrintf; /* Directory records that are used in execution of commands. */ dir_rec_t android_data_dir; dir_rec_t android_asec_dir; dir_rec_t android_app_dir; dir_rec_t android_app_private_dir; dir_rec_t android_app_lib_dir; dir_rec_t android_media_dir; dir_rec_t android_mnt_expand_dir; dir_rec_array_t android_system_dirs; static const char* kCpPath = "/system/bin/cp"; int install(const char *uuid, const char *pkgname, uid_t uid, gid_t gid, const char *seinfo) { if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) { ALOGE("invalid uid/gid: %d %d\n", uid, gid); return -1; } std::string _pkgdir(create_data_user_package_path(uuid, 0, pkgname)); const char* pkgdir = _pkgdir.c_str(); if (mkdir(pkgdir, 0751) < 0) { ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno)); return -1; } if (chmod(pkgdir, 0751) < 0) { ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno)); unlink(pkgdir); return -1; } if (selinux_android_setfilecon(pkgdir, pkgname, seinfo, uid) < 0) { ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno)); unlink(pkgdir); return -errno; } if (chown(pkgdir, uid, gid) < 0) { ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno)); unlink(pkgdir); return -1; } return 0; } int uninstall(const char *uuid, const char *pkgname, userid_t userid) { std::string _pkgdir(create_data_user_package_path(uuid, userid, pkgname)); const char* pkgdir = _pkgdir.c_str(); remove_profile_file(pkgname); /* delete contents AND directory, no exceptions */ return delete_dir_contents(pkgdir, 1, NULL); } int renamepkg(const char *oldpkgname, const char *newpkgname) { char oldpkgdir[PKG_PATH_MAX]; char newpkgdir[PKG_PATH_MAX]; if (create_pkg_path(oldpkgdir, oldpkgname, PKG_DIR_POSTFIX, 0)) return -1; if (create_pkg_path(newpkgdir, newpkgname, PKG_DIR_POSTFIX, 0)) return -1; if (rename(oldpkgdir, newpkgdir) < 0) { ALOGE("cannot rename dir '%s' to '%s': %s\n", oldpkgdir, newpkgdir, strerror(errno)); return -errno; } return 0; } int fix_uid(const char *uuid, const char *pkgname, uid_t uid, gid_t gid) { struct stat s; if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) { ALOGE("invalid uid/gid: %d %d\n", uid, gid); return -1; } std::string _pkgdir(create_data_user_package_path(uuid, 0, pkgname)); const char* pkgdir = _pkgdir.c_str(); if (stat(pkgdir, &s) < 0) return -1; if (s.st_uid != 0 || s.st_gid != 0) { ALOGE("fixing uid of non-root pkg: %s %" PRIu32 " %" PRIu32 "\n", pkgdir, s.st_uid, s.st_gid); return -1; } if (chmod(pkgdir, 0751) < 0) { ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno)); unlink(pkgdir); return -errno; } if (chown(pkgdir, uid, gid) < 0) { ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno)); unlink(pkgdir); return -errno; } return 0; } int delete_user_data(const char *uuid, const char *pkgname, userid_t userid) { std::string _pkgdir(create_data_user_package_path(uuid, userid, pkgname)); const char* pkgdir = _pkgdir.c_str(); return delete_dir_contents(pkgdir, 0, NULL); } int make_user_data(const char *uuid, const char *pkgname, uid_t uid, userid_t userid, const char* seinfo) { std::string _pkgdir(create_data_user_package_path(uuid, userid, pkgname)); const char* pkgdir = _pkgdir.c_str(); if (mkdir(pkgdir, 0751) < 0) { ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno)); return -errno; } if (chmod(pkgdir, 0751) < 0) { ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno)); unlink(pkgdir); return -errno; } if (selinux_android_setfilecon(pkgdir, pkgname, seinfo, uid) < 0) { ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno)); unlink(pkgdir); return -errno; } if (chown(pkgdir, uid, uid) < 0) { ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno)); unlink(pkgdir); return -errno; } return 0; } int copy_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) { std::vector 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 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; } uid_t uid = multiuser_get_uid(user, appid); if (make_user_data(to_uuid, package_name, uid, user, seinfo) != 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_data(to_uuid, package_name, seinfo, multiuser_get_uid(0, appid)) != 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 status = 0; std::string data_path(create_data_user_path(uuid, userid)); if (delete_dir_contents(data_path.c_str(), 1, NULL) != 0) { status = -1; } std::string media_path(create_data_media_path(uuid, userid)); if (delete_dir_contents(media_path.c_str(), 1, NULL) != 0) { status = -1; } // 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)) { status = -1; } } return status; } int delete_cache(const char *uuid, const char *pkgname, userid_t userid) { std::string _cachedir( create_data_user_package_path(uuid, userid, pkgname) + CACHE_DIR_POSTFIX); const char* cachedir = _cachedir.c_str(); /* delete contents, not the directory, no exceptions */ return delete_dir_contents(cachedir, 0, NULL); } int delete_code_cache(const char *uuid, const char *pkgname, userid_t userid) { std::string _codecachedir( create_data_user_package_path(uuid, userid, pkgname) + CODE_CACHE_DIR_POSTFIX); const char* codecachedir = _codecachedir.c_str(); struct stat s; /* it's okay if code cache is missing */ if (lstat(codecachedir, &s) == -1 && errno == ENOENT) { return 0; } /* delete contents, not the directory, no exceptions */ return delete_dir_contents(codecachedir, 0, NULL); } /* 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 move_dex(const char *src, const char *dst, const char *instruction_set) { char src_dex[PKG_PATH_MAX]; char dst_dex[PKG_PATH_MAX]; if (validate_apk_path(src)) { ALOGE("invalid apk path '%s' (bad prefix)\n", src); return -1; } if (validate_apk_path(dst)) { ALOGE("invalid apk path '%s' (bad prefix)\n", dst); return -1; } if (create_cache_path(src_dex, src, instruction_set)) return -1; if (create_cache_path(dst_dex, dst, instruction_set)) return -1; ALOGV("move %s -> %s\n", src_dex, dst_dex); if (rename(src_dex, dst_dex) < 0) { ALOGE("Couldn't move %s: %s\n", src_dex, strerror(errno)); return -1; } else { return 0; } } 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_size(const char *uuid, const char *pkgname, int userid, 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 users; if (userid == -1) { users = get_known_users(uuid); } else { users.push_back(userid); } for (auto user : users) { 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; } int create_cache_path(char path[PKG_PATH_MAX], const char *src, const char *instruction_set) { char *tmp; int srclen; int dstlen; srclen = strlen(src); /* demand that we are an absolute path */ if ((src == 0) || (src[0] != '/') || strstr(src,"..")) { return -1; } if (srclen > PKG_PATH_MAX) { // XXX: PKG_NAME_MAX? return -1; } dstlen = srclen + strlen(DALVIK_CACHE_PREFIX) + strlen(instruction_set) + strlen(DALVIK_CACHE_POSTFIX) + 2; if (dstlen > PKG_PATH_MAX) { return -1; } sprintf(path,"%s%s/%s%s", DALVIK_CACHE_PREFIX, instruction_set, src + 1, /* skip the leading / */ DALVIK_CACHE_POSTFIX); for(tmp = path + strlen(DALVIK_CACHE_PREFIX) + strlen(instruction_set) + 1; *tmp; tmp++) { if (*tmp == '/') { *tmp = '@'; } } return 0; } static int split_count(const char *str) { char *ctx; int count = 0; char buf[PROPERTY_VALUE_MAX]; 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 __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[PROPERTY_VALUE_MAX]; bool have_property = property_get(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 *pkgname, const char *instruction_set, bool vm_safe_mode, bool debuggable, bool post_bootcomplete) { 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; } char prop_buf[PROPERTY_VALUE_MAX]; bool profiler = (property_get("dalvik.vm.profiler", prop_buf, "0") > 0) && (prop_buf[0] == '1'); char dex2oat_Xms_flag[PROPERTY_VALUE_MAX]; bool have_dex2oat_Xms_flag = property_get("dalvik.vm.dex2oat-Xms", dex2oat_Xms_flag, NULL) > 0; char dex2oat_Xmx_flag[PROPERTY_VALUE_MAX]; bool have_dex2oat_Xmx_flag = property_get("dalvik.vm.dex2oat-Xmx", dex2oat_Xmx_flag, NULL) > 0; char dex2oat_compiler_filter_flag[PROPERTY_VALUE_MAX]; bool have_dex2oat_compiler_filter_flag = property_get("dalvik.vm.dex2oat-filter", dex2oat_compiler_filter_flag, NULL) > 0; char dex2oat_threads_buf[PROPERTY_VALUE_MAX]; bool have_dex2oat_threads_flag = false; if (!post_bootcomplete) { have_dex2oat_threads_flag = property_get("dalvik.vm.boot-dex2oat-threads", dex2oat_threads_buf, NULL) > 0; // If there's no boot property, fall back to the image property. if (!have_dex2oat_threads_flag) { have_dex2oat_threads_flag = property_get("dalvik.vm.image-dex2oat-threads", dex2oat_threads_buf, NULL) > 0; } // If there's neither, fall back to the default property. } if (!have_dex2oat_threads_flag) { have_dex2oat_threads_flag = property_get("dalvik.vm.dex2oat-threads", dex2oat_threads_buf, NULL) > 0; } char dex2oat_threads_arg[PROPERTY_VALUE_MAX + 2]; if (have_dex2oat_threads_flag) { sprintf(dex2oat_threads_arg, "-j%s", dex2oat_threads_buf); } char dex2oat_isa_features_key[PROPERTY_KEY_MAX]; sprintf(dex2oat_isa_features_key, "dalvik.vm.isa.%s.features", instruction_set); char dex2oat_isa_features[PROPERTY_VALUE_MAX]; bool have_dex2oat_isa_features = property_get(dex2oat_isa_features_key, dex2oat_isa_features, NULL) > 0; char dex2oat_isa_variant_key[PROPERTY_KEY_MAX]; sprintf(dex2oat_isa_variant_key, "dalvik.vm.isa.%s.variant", instruction_set); char dex2oat_isa_variant[PROPERTY_VALUE_MAX]; bool have_dex2oat_isa_variant = property_get(dex2oat_isa_variant_key, dex2oat_isa_variant, NULL) > 0; const char *dex2oat_norelocation = "-Xnorelocate"; bool have_dex2oat_relocation_skip_flag = false; char dex2oat_flags[PROPERTY_VALUE_MAX]; int dex2oat_flags_count = property_get("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[PROPERTY_VALUE_MAX]; bool have_vold_decrypt = property_get("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 use_jit = check_boolean_property("debug.usejit"); 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=") + PROPERTY_VALUE_MAX]; char instruction_set_features_arg[strlen("--instruction-set-features=") + PROPERTY_VALUE_MAX]; char profile_file_arg[strlen("--profile-file=") + PKG_PATH_MAX]; char top_k_profile_threshold_arg[strlen("--top-k-profile-threshold=") + PROPERTY_VALUE_MAX]; char dex2oat_Xms_arg[strlen("-Xms") + PROPERTY_VALUE_MAX]; char dex2oat_Xmx_arg[strlen("-Xmx") + PROPERTY_VALUE_MAX]; char dex2oat_compiler_filter_arg[strlen("--compiler-filter=") + PROPERTY_VALUE_MAX]; 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); } bool have_profile_file = false; bool have_top_k_profile_threshold = false; if (profiler && (strcmp(pkgname, "*") != 0)) { char profile_file[PKG_PATH_MAX]; snprintf(profile_file, sizeof(profile_file), "%s/%s", DALVIK_CACHE_PREFIX "profiles", pkgname); struct stat st; if ((stat(profile_file, &st) == 0) && (st.st_size > 0)) { sprintf(profile_file_arg, "--profile-file=%s", profile_file); have_profile_file = true; if (property_get("dalvik.vm.profile.top-k-thr", prop_buf, NULL) > 0) { snprintf(top_k_profile_threshold_arg, sizeof(top_k_profile_threshold_arg), "--top-k-profile-threshold=%s", prop_buf); have_top_k_profile_threshold = true; } } } 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 (use_jit) { 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) { debuggable = (property_get("dalvik.vm.always_debuggable", prop_buf, "0") > 0) && (prop_buf[0] == '1'); } 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_profile_file ? 1 : 0) + (have_top_k_profile_threshold ? 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]; 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_profile_file) { argv[i++] = profile_file_arg; } if (have_top_k_profile_threshold) { argv[i++] = top_k_profile_threshold_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; } // 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)); } static int wait_child(pid_t pid) { int status; pid_t got_pid; while (1) { got_pid = waitpid(pid, &status, 0); if (got_pid == -1 && errno == EINTR) { printf("waitpid interrupted, retrying\n"); } else { break; } } if (got_pid != pid) { ALOGW("waitpid failed: wanted %d, got %d: %s\n", (int) pid, (int) got_pid, strerror(errno)); return 1; } if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { return 0; } else { return status; /* always nonzero */ } } /* * 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[PROPERTY_VALUE_MAX]; if (property_get("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; } /* * Computes the odex file for the given apk_path and instruction_set. * /system/framework/whatever.jar -> /system/framework/oat//whatever.odex * * Returns false if it failed to determine the odex file path. */ static 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/\0 strcat(path, apk_end); // path = /system/framework/oat//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; } 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); } } } int dexopt(const char *apk_path, uid_t uid, bool is_public, const char *pkgname, const char *instruction_set, int dexopt_needed, bool vm_safe_mode, bool debuggable, const char* oat_dir, bool boot_complete) { 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; // 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 profile file if there is a package name present. if (strcmp(pkgname, "*") != 0) { create_profile_file(pkgname, uid); } // 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) { const char *input_file_name = strrchr(input_file, '/'); if (input_file_name == NULL) { input_file_name = input_file; } else { input_file_name++; } run_dex2oat(input_fd, out_fd, input_file_name, out_path, swap_fd, pkgname, instruction_set, vm_safe_mode, debuggable, boot_complete); } 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); } return 0; fail: if (out_fd >= 0) { close(out_fd); unlink(out_path); } if (input_fd >= 0) { close(input_fd); } return -1; } int mark_boot_complete(const char* instruction_set) { char boot_marker_path[PKG_PATH_MAX]; sprintf(boot_marker_path,"%s%s/.booting", DALVIK_CACHE_PREFIX, 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, const char *cache_path, int idmap_fd, uint32_t target_hash, uint32_t overlay_hash) { static const char *IDMAP_BIN = "/system/bin/idmap"; static const size_t MAX_INT_LEN = 32; char idmap_str[MAX_INT_LEN]; char target_hash_str[MAX_INT_LEN]; char overlay_hash_str[MAX_INT_LEN]; snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd); snprintf(target_hash_str, sizeof(target_hash_str), "%d", target_hash); snprintf(overlay_hash_str, sizeof(overlay_hash_str), "%d", overlay_hash); execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, cache_path, idmap_str, target_hash_str, overlay_hash_str, (char*)NULL); ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno)); } static int get_idmap_path(const char *prefix, const char *suffix, char *idmap_path, size_t N) { if (idmap_path == NULL) return -1; memset(idmap_path, 0, N); int len = snprintf(idmap_path, N, "%s/%s", prefix, suffix); if (len < 0 || (size_t)len >= N) { return -1; // error or truncated } return 0; } int idmap(const char *target_apk, const char *overlay_apk, const char *cache_path, uid_t uid, uint32_t target_hash, uint32_t overlay_hash) { ALOGD("idmap target_apk=%s overlay_apk=%s cache_path=%s uid=%d\n", target_apk, overlay_apk, cache_path, uid); int idmap_fd = -1; char idmap_path[PATH_MAX]; if (get_idmap_path(cache_path, IDMAP_SUFFIX, 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, cache_path, idmap_fd, target_hash, overlay_hash); 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; } static void run_aapt(const char *source_apk, const char *internal_path, int resapk_fd, int pkgId, int min_sdk_version, const char *common_res_path) { static const char *AAPT_BIN = "/system/bin/aapt"; static const char *MANIFEST = "/data/app/AndroidManifest.xml"; static const char *FRAMEWORK_RES = "/system/framework/framework-res.apk"; static const size_t MAX_INT_LEN = 32; char resapk_str[MAX_INT_LEN]; char pkgId_str[MAX_INT_LEN]; char minSdkVersion_str[MAX_INT_LEN]; snprintf(resapk_str, sizeof(resapk_str), "%d", resapk_fd); snprintf(pkgId_str, sizeof(pkgId_str), "%d", pkgId); snprintf(minSdkVersion_str, sizeof(minSdkVersion_str), "%d", min_sdk_version); bool hasCommonResources = (common_res_path != NULL && common_res_path[0] != '\0'); if (hasCommonResources) { execl(AAPT_BIN, AAPT_BIN, "package", "--min-sdk-version", minSdkVersion_str, "-M", MANIFEST, "-S", source_apk, "-X", internal_path, "-I", FRAMEWORK_RES, "-I", common_res_path, "-r", resapk_str, "-x", pkgId_str, "-f", (char*)NULL); } else { execl(AAPT_BIN, AAPT_BIN, "package", "--min-sdk-version", minSdkVersion_str, "-M", MANIFEST, "-S", source_apk, "-X", internal_path, "-I", FRAMEWORK_RES, "-r", resapk_str, "-x", pkgId_str, "-f", (char*)NULL); } ALOGE("execl(%s) failed: %s\n", AAPT_BIN, strerror(errno)); } int aapt(const char *source_apk, const char *internal_path, const char *out_restable, uid_t uid, int pkgId, int min_sdk_version, const char *common_res_path) { ALOGD("aapt source_apk=%s internal_path=%s out_restable=%s uid=%d, pkgId=%d,min_sdk_version=%d, common_res_path=%s", source_apk, internal_path, out_restable, uid, pkgId, min_sdk_version, common_res_path); static const int PARENT_READ_PIPE = 0; static const int CHILD_WRITE_PIPE = 1; int resapk_fd = -1; char restable_path[PATH_MAX]; char resapk_path[PATH_MAX]; // create pipes for redirecting STDERR to a buffer that can be displayed in logcat int pipefd[2]; if (pipe(pipefd) != 0) { pipefd[0] = pipefd[1] = -1; } pid_t pid = fork(); if (pid == 0) { // get file descriptor for resources.arsc snprintf(restable_path, PATH_MAX, "%s/resources.arsc", out_restable); unlink(restable_path); // get file descriptor for resources.apk snprintf(resapk_path, PATH_MAX, "%s/resources.apk", out_restable); unlink(resapk_path); resapk_fd = open(resapk_path, O_RDWR | O_CREAT | O_EXCL, 0644); if (resapk_fd < 0) { ALOGE("aapt cannot open '%s' for output: %s\n", resapk_path, strerror(errno)); goto fail; } if (fchown(resapk_fd, AID_SYSTEM, uid) < 0) { ALOGE("aapt cannot chown '%s'\n", resapk_path); goto fail; } if (fchmod(resapk_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { ALOGE("aapt cannot chmod '%s'\n", resapk_path); goto fail; } /* child -- drop privileges before continuing */ if (setgid(uid) != 0) { ALOGE("setgid(%d) failed during aapt\n", uid); exit(1); } if (setuid(uid) != 0) { ALOGE("setuid(%d) failed during aapt\n", uid); exit(1); } if (flock(resapk_fd, LOCK_EX | LOCK_NB) != 0) { ALOGE("flock(%s) failed during aapt: %s\n", out_restable, strerror(errno)); exit(1); } if (pipefd[PARENT_READ_PIPE] > 0 && pipefd[CHILD_WRITE_PIPE] > 0) { close(pipefd[PARENT_READ_PIPE]); // close unused read end if (dup2(pipefd[CHILD_WRITE_PIPE], STDERR_FILENO) != STDERR_FILENO) { pipefd[CHILD_WRITE_PIPE] = -1; } } run_aapt(source_apk, internal_path, resapk_fd, pkgId, min_sdk_version, common_res_path); close(resapk_fd); if (pipefd[CHILD_WRITE_PIPE] > 0) { close(pipefd[CHILD_WRITE_PIPE]); } exit(1); /* only if exec call to idmap failed */ } else { int status, i; char buffer[1024]; ssize_t readlen; if (pipefd[CHILD_WRITE_PIPE] > 0) { close(pipefd[CHILD_WRITE_PIPE]); // close unused write end } if (pipefd[PARENT_READ_PIPE] > 0) { while ((readlen = read(pipefd[PARENT_READ_PIPE], buffer, sizeof(buffer) - 1)) > 0) { // in case buffer has more than one string in it, replace '\0' with '\n' for (i = 0; i < readlen; i++) { if (buffer[i] == '\0') buffer[i] = '\n'; } // null terminate buffer at readlen buffer[readlen] = '\0'; ALOG(LOG_ERROR, "InstallTheme", "%s", buffer); } waitpid(pid, &status, 0); if (pipefd[PARENT_READ_PIPE] > 0) { close(pipefd[PARENT_READ_PIPE]); } } else { status = wait_child(pid); } if (status != 0) { ALOGE("aapt failed, status=0x%04x\n", status); goto fail; } } return 0; fail: if (resapk_fd >= 0) { close(resapk_fd); unlink(resapk_path); } return -1; } int restorecon_data(const char* uuid, const char* pkgName, const char* seinfo, uid_t uid) { struct dirent *entry; DIR *d; struct stat s; int ret = 0; // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here. unsigned int flags = SELINUX_ANDROID_RESTORECON_RECURSE; if (!pkgName || !seinfo) { ALOGE("Package name or seinfo tag is null when trying to restorecon."); return -1; } // Special case for owner on internal storage if (uuid == nullptr) { std::string path(create_data_user_package_path(nullptr, 0, pkgName)); if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, flags) < 0) { PLOG(ERROR) << "restorecon failed for " << path; ret |= -1; } } // Relabel package directory for all secondary users. std::string userdir(create_data_path(uuid) + "/" + SECONDARY_USER_PREFIX); d = opendir(userdir.c_str()); if (d == NULL) { return -1; } while ((entry = readdir(d))) { if (entry->d_type != DT_DIR) { continue; } const char *user = entry->d_name; // Ignore "." and ".." if (!strcmp(user, ".") || !strcmp(user, "..")) { continue; } // user directories start with a number if (user[0] < '0' || user[0] > '9') { ALOGE("Expecting numbered directory during restorecon. Instead got '%s'.", user); continue; } std::string pkgdir(StringPrintf("%s%s/%s", userdir.c_str(), user, pkgName)); if (stat(pkgdir.c_str(), &s) < 0) { continue; } if (selinux_android_restorecon_pkgdir(pkgdir.c_str(), seinfo, s.st_uid, flags) < 0) { PLOG(ERROR) << "restorecon failed for " << pkgdir; ret |= -1; } } closedir(d); return ret; } 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; } int 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 -1; } file_name_end = strrchr(apk_path, '.'); if (file_name_end < file_name_start) { ALOGE("apk_path '%s' has no extension\n", apk_path); return -1; } // 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'; // /oat//.odex snprintf(path, PKG_PATH_MAX, "%s/%s/%s.odex", oat_dir, instruction_set, file_name); return 0; }