diff options
Diffstat (limited to 'cmds/installd/installd.cpp')
| -rw-r--r-- | cmds/installd/installd.cpp | 730 |
1 files changed, 730 insertions, 0 deletions
diff --git a/cmds/installd/installd.cpp b/cmds/installd/installd.cpp new file mode 100644 index 0000000..3a86181 --- /dev/null +++ b/cmds/installd/installd.cpp @@ -0,0 +1,730 @@ +/* +** 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 <base/logging.h> + +#include <sys/capability.h> +#include <sys/prctl.h> +#include <selinux/android.h> +#include <selinux/avc.h> + +#define BUFFER_MAX 1024 /* input buffer for commands */ +#define TOKEN_MAX 16 /* max number of arguments in buffer */ +#define REPLY_MAX 256 /* largest reply allowed */ + +static char* parse_null(char* arg) { + if (strcmp(arg, "!") == 0) { + return nullptr; + } else { + return arg; + } +} + +static int do_ping(char **arg __unused, char reply[REPLY_MAX] __unused) +{ + return 0; +} + +static int do_install(char **arg, char reply[REPLY_MAX] __unused) +{ + return install(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), arg[4]); /* uuid, pkgname, uid, gid, seinfo */ +} + +static int do_dexopt(char **arg, char reply[REPLY_MAX] __unused) +{ + /* apk_path, uid, is_public, pkgname, instruction_set, + * dexopt_needed, vm_safe_mode, debuggable, oat_dir */ + return dexopt(arg[0], atoi(arg[1]), atoi(arg[2]), arg[3], arg[4], atoi(arg[5]), + atoi(arg[6]), atoi(arg[7]), arg[8]); +} + +static int do_mark_boot_complete(char **arg, char reply[REPLY_MAX] __unused) +{ + return mark_boot_complete(arg[0] /* instruction set */); +} + +static int do_move_dex(char **arg, char reply[REPLY_MAX] __unused) +{ + return move_dex(arg[0], arg[1], arg[2]); /* src, dst, instruction_set */ +} + +static int do_rm_dex(char **arg, char reply[REPLY_MAX] __unused) +{ + return rm_dex(arg[0], arg[1]); /* pkgname, instruction_set */ +} + +static int do_remove(char **arg, char reply[REPLY_MAX] __unused) +{ + return uninstall(parse_null(arg[0]), arg[1], atoi(arg[2])); /* uuid, pkgname, userid */ +} + +static int do_rename(char **arg, char reply[REPLY_MAX] __unused) +{ + return renamepkg(arg[0], arg[1]); /* oldpkgname, newpkgname */ +} + +static int do_fixuid(char **arg, char reply[REPLY_MAX] __unused) +{ + return fix_uid(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3])); /* uuid, pkgname, uid, gid */ +} + +static int do_free_cache(char **arg, char reply[REPLY_MAX] __unused) /* TODO int:free_size */ +{ + return free_cache(parse_null(arg[0]), (int64_t)atoll(arg[1])); /* uuid, free_size */ +} + +static int do_rm_cache(char **arg, char reply[REPLY_MAX] __unused) +{ + return delete_cache(parse_null(arg[0]), arg[1], atoi(arg[2])); /* uuid, pkgname, userid */ +} + +static int do_rm_code_cache(char **arg, char reply[REPLY_MAX] __unused) +{ + return delete_code_cache(parse_null(arg[0]), arg[1], atoi(arg[2])); /* uuid, pkgname, userid */ +} + +static int do_get_size(char **arg, char reply[REPLY_MAX]) +{ + int64_t codesize = 0; + int64_t datasize = 0; + int64_t cachesize = 0; + int64_t asecsize = 0; + int res = 0; + + /* uuid, pkgdir, userid, apkpath */ + res = get_size(parse_null(arg[0]), arg[1], atoi(arg[2]), arg[3], arg[4], arg[5], arg[6], + arg[7], &codesize, &datasize, &cachesize, &asecsize); + + /* + * Each int64_t can take up 22 characters printed out. Make sure it + * doesn't go over REPLY_MAX in the future. + */ + snprintf(reply, REPLY_MAX, "%" PRId64 " %" PRId64 " %" PRId64 " %" PRId64, + codesize, datasize, cachesize, asecsize); + return res; +} + +static int do_rm_user_data(char **arg, char reply[REPLY_MAX] __unused) +{ + return delete_user_data(parse_null(arg[0]), arg[1], atoi(arg[2])); /* uuid, pkgname, userid */ +} + +static int do_mv_user_data(char **arg, char reply[REPLY_MAX] __unused) +{ + // from_uuid, to_uuid, pkgname, appid, seinfo + return move_user_data(parse_null(arg[0]), parse_null(arg[1]), arg[2], atoi(arg[3]), arg[4]); +} + +static int do_mk_user_data(char **arg, char reply[REPLY_MAX] __unused) +{ + return make_user_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), arg[4]); + /* uuid, pkgname, uid, userid, seinfo */ +} + +static int do_mk_user_config(char **arg, char reply[REPLY_MAX] __unused) +{ + return make_user_config(atoi(arg[0])); /* userid */ +} + +static int do_rm_user(char **arg, char reply[REPLY_MAX] __unused) +{ + return delete_user(parse_null(arg[0]), atoi(arg[1])); /* uuid, userid */ +} + +static int do_movefiles(char **arg __unused, char reply[REPLY_MAX] __unused) +{ + return movefiles(); +} + +static int do_linklib(char **arg, char reply[REPLY_MAX] __unused) +{ + return linklib(parse_null(arg[0]), arg[1], arg[2], atoi(arg[3])); +} + +static int do_idmap(char **arg, char reply[REPLY_MAX] __unused) +{ + return idmap(arg[0], arg[1], atoi(arg[2])); +} + +static int do_restorecon_data(char **arg, char reply[REPLY_MAX] __attribute__((unused))) +{ + return restorecon_data(parse_null(arg[0]), arg[1], arg[2], atoi(arg[3])); + /* uuid, pkgName, seinfo, uid*/ +} + +static int do_create_oat_dir(char **arg, char reply[REPLY_MAX] __unused) +{ + /* oat_dir, instruction_set */ + return create_oat_dir(arg[0], arg[1]); +} + +static int do_rm_package_dir(char **arg, char reply[REPLY_MAX] __unused) +{ + /* oat_dir */ + return rm_package_dir(arg[0]); +} + +struct cmdinfo { + const char *name; + unsigned numargs; + int (*func)(char **arg, char reply[REPLY_MAX]); +}; + +struct cmdinfo cmds[] = { + { "ping", 0, do_ping }, + { "install", 5, do_install }, + { "dexopt", 9, do_dexopt }, + { "markbootcomplete", 1, do_mark_boot_complete }, + { "movedex", 3, do_move_dex }, + { "rmdex", 2, do_rm_dex }, + { "remove", 3, do_remove }, + { "rename", 2, do_rename }, + { "fixuid", 4, do_fixuid }, + { "freecache", 2, do_free_cache }, + { "rmcache", 3, do_rm_cache }, + { "rmcodecache", 3, do_rm_code_cache }, + { "getsize", 8, do_get_size }, + { "rmuserdata", 3, do_rm_user_data }, + { "mvuserdata", 5, do_mv_user_data }, + { "movefiles", 0, do_movefiles }, + { "linklib", 4, do_linklib }, + { "mkuserdata", 5, do_mk_user_data }, + { "mkuserconfig", 1, do_mk_user_config }, + { "rmuser", 2, do_rm_user }, + { "idmap", 3, do_idmap }, + { "restorecondata", 4, do_restorecon_data }, + { "createoatdir", 2, do_create_oat_dir }, + { "rmpackagedir", 1, do_rm_package_dir}, +}; + +static int readx(int s, void *_buf, int count) +{ + char *buf = (char *) _buf; + int n = 0, r; + if (count < 0) return -1; + while (n < count) { + r = read(s, buf + n, count - n); + if (r < 0) { + if (errno == EINTR) continue; + ALOGE("read error: %s\n", strerror(errno)); + return -1; + } + if (r == 0) { + ALOGE("eof\n"); + return -1; /* EOF */ + } + n += r; + } + return 0; +} + +static int writex(int s, const void *_buf, int count) +{ + const char *buf = (const char *) _buf; + int n = 0, r; + if (count < 0) return -1; + while (n < count) { + r = write(s, buf + n, count - n); + if (r < 0) { + if (errno == EINTR) continue; + ALOGE("write error: %s\n", strerror(errno)); + return -1; + } + n += r; + } + return 0; +} + + +/* Tokenize the command buffer, locate a matching command, + * ensure that the required number of arguments are provided, + * call the function(), return the result. + */ +static int execute(int s, char cmd[BUFFER_MAX]) +{ + char reply[REPLY_MAX]; + char *arg[TOKEN_MAX+1]; + unsigned i; + unsigned n = 0; + unsigned short count; + int ret = -1; + + // ALOGI("execute('%s')\n", cmd); + + /* default reply is "" */ + reply[0] = 0; + + /* n is number of args (not counting arg[0]) */ + arg[0] = cmd; + while (*cmd) { + if (isspace(*cmd)) { + *cmd++ = 0; + n++; + arg[n] = cmd; + if (n == TOKEN_MAX) { + ALOGE("too many arguments\n"); + goto done; + } + } + if (*cmd) { + cmd++; + } + } + + for (i = 0; i < sizeof(cmds) / sizeof(cmds[0]); i++) { + if (!strcmp(cmds[i].name,arg[0])) { + if (n != cmds[i].numargs) { + ALOGE("%s requires %d arguments (%d given)\n", + cmds[i].name, cmds[i].numargs, n); + } else { + ret = cmds[i].func(arg + 1, reply); + } + goto done; + } + } + ALOGE("unsupported command '%s'\n", arg[0]); + +done: + if (reply[0]) { + n = snprintf(cmd, BUFFER_MAX, "%d %s", ret, reply); + } else { + n = snprintf(cmd, BUFFER_MAX, "%d", ret); + } + if (n > BUFFER_MAX) n = BUFFER_MAX; + count = n; + + // ALOGI("reply: '%s'\n", cmd); + if (writex(s, &count, sizeof(count))) return -1; + if (writex(s, cmd, count)) return -1; + return 0; +} + +/** + * Initialize all the global variables that are used elsewhere. Returns 0 upon + * success and -1 on error. + */ +void free_globals() { + size_t i; + + for (i = 0; i < android_system_dirs.count; i++) { + if (android_system_dirs.dirs[i].path != NULL) { + free(android_system_dirs.dirs[i].path); + } + } + + free(android_system_dirs.dirs); +} + +int initialize_globals() { + // Get the android data directory. + if (get_path_from_env(&android_data_dir, "ANDROID_DATA") < 0) { + return -1; + } + + // Get the android app directory. + if (copy_and_append(&android_app_dir, &android_data_dir, APP_SUBDIR) < 0) { + return -1; + } + + // Get the android protected app directory. + if (copy_and_append(&android_app_private_dir, &android_data_dir, PRIVATE_APP_SUBDIR) < 0) { + return -1; + } + + // Get the android app native library directory. + if (copy_and_append(&android_app_lib_dir, &android_data_dir, APP_LIB_SUBDIR) < 0) { + return -1; + } + + // Get the sd-card ASEC mount point. + if (get_path_from_env(&android_asec_dir, "ASEC_MOUNTPOINT") < 0) { + return -1; + } + + // Get the android media directory. + if (copy_and_append(&android_media_dir, &android_data_dir, MEDIA_SUBDIR) < 0) { + return -1; + } + + // Get the android external app directory. + if (get_path_from_string(&android_mnt_expand_dir, "/mnt/expand/") < 0) { + return -1; + } + + // Take note of the system and vendor directories. + android_system_dirs.count = 4; + + android_system_dirs.dirs = (dir_rec_t*) calloc(android_system_dirs.count, sizeof(dir_rec_t)); + if (android_system_dirs.dirs == NULL) { + ALOGE("Couldn't allocate array for dirs; aborting\n"); + return -1; + } + + dir_rec_t android_root_dir; + if (get_path_from_env(&android_root_dir, "ANDROID_ROOT") < 0) { + ALOGE("Missing ANDROID_ROOT; aborting\n"); + return -1; + } + + android_system_dirs.dirs[0].path = build_string2(android_root_dir.path, APP_SUBDIR); + android_system_dirs.dirs[0].len = strlen(android_system_dirs.dirs[0].path); + + android_system_dirs.dirs[1].path = build_string2(android_root_dir.path, PRIV_APP_SUBDIR); + android_system_dirs.dirs[1].len = strlen(android_system_dirs.dirs[1].path); + + android_system_dirs.dirs[2].path = strdup("/vendor/app/"); + android_system_dirs.dirs[2].len = strlen(android_system_dirs.dirs[2].path); + + android_system_dirs.dirs[3].path = strdup("/oem/app/"); + android_system_dirs.dirs[3].len = strlen(android_system_dirs.dirs[3].path); + + return 0; +} + +int initialize_directories() { + int res = -1; + + // Read current filesystem layout version to handle upgrade paths + char version_path[PATH_MAX]; + snprintf(version_path, PATH_MAX, "%s.layout_version", android_data_dir.path); + + int oldVersion; + if (fs_read_atomic_int(version_path, &oldVersion) == -1) { + oldVersion = 0; + } + int version = oldVersion; + + // /data/user + char *user_data_dir = build_string2(android_data_dir.path, SECONDARY_USER_PREFIX); + // /data/data + char *legacy_data_dir = build_string2(android_data_dir.path, PRIMARY_USER_PREFIX); + // /data/user/0 + char *primary_data_dir = build_string3(android_data_dir.path, SECONDARY_USER_PREFIX, "0"); + if (!user_data_dir || !legacy_data_dir || !primary_data_dir) { + goto fail; + } + + // Make the /data/user directory if necessary + if (access(user_data_dir, R_OK) < 0) { + if (mkdir(user_data_dir, 0711) < 0) { + goto fail; + } + if (chown(user_data_dir, AID_SYSTEM, AID_SYSTEM) < 0) { + goto fail; + } + if (chmod(user_data_dir, 0711) < 0) { + goto fail; + } + } + // Make the /data/user/0 symlink to /data/data if necessary + if (access(primary_data_dir, R_OK) < 0) { + if (symlink(legacy_data_dir, primary_data_dir)) { + goto fail; + } + } + + if (version == 0) { + // Introducing multi-user, so migrate /data/media contents into /data/media/0 + ALOGD("Upgrading /data/media for multi-user"); + + // Ensure /data/media + if (fs_prepare_dir(android_media_dir.path, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) { + goto fail; + } + + // /data/media.tmp + char media_tmp_dir[PATH_MAX]; + snprintf(media_tmp_dir, PATH_MAX, "%smedia.tmp", android_data_dir.path); + + // Only copy when upgrade not already in progress + if (access(media_tmp_dir, F_OK) == -1) { + if (rename(android_media_dir.path, media_tmp_dir) == -1) { + ALOGE("Failed to move legacy media path: %s", strerror(errno)); + goto fail; + } + } + + // Create /data/media again + if (fs_prepare_dir(android_media_dir.path, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) { + goto fail; + } + + if (selinux_android_restorecon(android_media_dir.path, 0)) { + goto fail; + } + + // /data/media/0 + char owner_media_dir[PATH_MAX]; + snprintf(owner_media_dir, PATH_MAX, "%s0", android_media_dir.path); + + // Move any owner data into place + if (access(media_tmp_dir, F_OK) == 0) { + if (rename(media_tmp_dir, owner_media_dir) == -1) { + ALOGE("Failed to move owner media path: %s", strerror(errno)); + goto fail; + } + } + + // Ensure media directories for any existing users + DIR *dir; + struct dirent *dirent; + char user_media_dir[PATH_MAX]; + + dir = opendir(user_data_dir); + if (dir != NULL) { + while ((dirent = readdir(dir))) { + if (dirent->d_type == DT_DIR) { + const char *name = dirent->d_name; + + // skip "." and ".." + if (name[0] == '.') { + if (name[1] == 0) continue; + if ((name[1] == '.') && (name[2] == 0)) continue; + } + + // /data/media/<user_id> + snprintf(user_media_dir, PATH_MAX, "%s%s", android_media_dir.path, name); + if (fs_prepare_dir(user_media_dir, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) { + goto fail; + } + } + } + closedir(dir); + } + + version = 1; + } + + // /data/media/obb + char media_obb_dir[PATH_MAX]; + snprintf(media_obb_dir, PATH_MAX, "%sobb", android_media_dir.path); + + if (version == 1) { + // Introducing /data/media/obb for sharing OBB across users; migrate + // any existing OBB files from owner. + ALOGD("Upgrading to shared /data/media/obb"); + + // /data/media/0/Android/obb + char owner_obb_path[PATH_MAX]; + snprintf(owner_obb_path, PATH_MAX, "%s0/Android/obb", android_media_dir.path); + + // Only move if target doesn't already exist + if (access(media_obb_dir, F_OK) != 0 && access(owner_obb_path, F_OK) == 0) { + if (rename(owner_obb_path, media_obb_dir) == -1) { + ALOGE("Failed to move OBB from owner: %s", strerror(errno)); + goto fail; + } + } + + version = 2; + } + + if (ensure_media_user_dirs(nullptr, 0) == -1) { + ALOGE("Failed to setup media for user 0"); + goto fail; + } + if (fs_prepare_dir(media_obb_dir, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) { + goto fail; + } + + if (ensure_config_user_dirs(0) == -1) { + ALOGE("Failed to setup misc for user 0"); + goto fail; + } + + if (version == 2) { + ALOGD("Upgrading to /data/misc/user directories"); + + char misc_dir[PATH_MAX]; + snprintf(misc_dir, PATH_MAX, "%smisc", android_data_dir.path); + + char keychain_added_dir[PATH_MAX]; + snprintf(keychain_added_dir, PATH_MAX, "%s/keychain/cacerts-added", misc_dir); + + char keychain_removed_dir[PATH_MAX]; + snprintf(keychain_removed_dir, PATH_MAX, "%s/keychain/cacerts-removed", misc_dir); + + DIR *dir; + struct dirent *dirent; + dir = opendir(user_data_dir); + if (dir != NULL) { + while ((dirent = readdir(dir))) { + const char *name = dirent->d_name; + + // skip "." and ".." + if (name[0] == '.') { + if (name[1] == 0) continue; + if ((name[1] == '.') && (name[2] == 0)) continue; + } + + uint32_t user_id = atoi(name); + + // /data/misc/user/<user_id> + if (ensure_config_user_dirs(user_id) == -1) { + goto fail; + } + + char misc_added_dir[PATH_MAX]; + snprintf(misc_added_dir, PATH_MAX, "%s/user/%s/cacerts-added", misc_dir, name); + + char misc_removed_dir[PATH_MAX]; + snprintf(misc_removed_dir, PATH_MAX, "%s/user/%s/cacerts-removed", misc_dir, name); + + uid_t uid = multiuser_get_uid(user_id, AID_SYSTEM); + gid_t gid = uid; + if (access(keychain_added_dir, F_OK) == 0) { + if (copy_dir_files(keychain_added_dir, misc_added_dir, uid, gid) != 0) { + ALOGE("Some files failed to copy"); + } + } + if (access(keychain_removed_dir, F_OK) == 0) { + if (copy_dir_files(keychain_removed_dir, misc_removed_dir, uid, gid) != 0) { + ALOGE("Some files failed to copy"); + } + } + } + closedir(dir); + + if (access(keychain_added_dir, F_OK) == 0) { + delete_dir_contents(keychain_added_dir, 1, 0); + } + if (access(keychain_removed_dir, F_OK) == 0) { + delete_dir_contents(keychain_removed_dir, 1, 0); + } + } + + version = 3; + } + + // Persist layout version if changed + if (version != oldVersion) { + if (fs_write_atomic_int(version_path, version) == -1) { + ALOGE("Failed to save version to %s: %s", version_path, strerror(errno)); + goto fail; + } + } + + // Success! + res = 0; + +fail: + free(user_data_dir); + free(legacy_data_dir); + free(primary_data_dir); + return res; +} + +static int log_callback(int type, const char *fmt, ...) { + va_list ap; + int priority; + + switch (type) { + case SELINUX_WARNING: + priority = ANDROID_LOG_WARN; + break; + case SELINUX_INFO: + priority = ANDROID_LOG_INFO; + break; + default: + priority = ANDROID_LOG_ERROR; + break; + } + va_start(ap, fmt); + LOG_PRI_VA(priority, "SELinux", fmt, ap); + va_end(ap); + return 0; +} + +int main(const int argc __unused, char *argv[]) { + char buf[BUFFER_MAX]; + struct sockaddr addr; + socklen_t alen; + int lsocket, s; + int selinux_enabled = (is_selinux_enabled() > 0); + + setenv("ANDROID_LOG_TAGS", "*:v", 1); + android::base::InitLogging(argv); + + ALOGI("installd firing up\n"); + + union selinux_callback cb; + cb.func_log = log_callback; + selinux_set_callback(SELINUX_CB_LOG, cb); + + if (initialize_globals() < 0) { + ALOGE("Could not initialize globals; exiting.\n"); + exit(1); + } + + if (initialize_directories() < 0) { + ALOGE("Could not create directories; exiting.\n"); + exit(1); + } + + if (selinux_enabled && selinux_status_open(true) < 0) { + ALOGE("Could not open selinux status; exiting.\n"); + exit(1); + } + + lsocket = android_get_control_socket(SOCKET_PATH); + if (lsocket < 0) { + ALOGE("Failed to get socket from environment: %s\n", strerror(errno)); + exit(1); + } + if (listen(lsocket, 5)) { + ALOGE("Listen on socket failed: %s\n", strerror(errno)); + exit(1); + } + fcntl(lsocket, F_SETFD, FD_CLOEXEC); + + for (;;) { + alen = sizeof(addr); + s = accept(lsocket, &addr, &alen); + if (s < 0) { + ALOGE("Accept failed: %s\n", strerror(errno)); + continue; + } + fcntl(s, F_SETFD, FD_CLOEXEC); + + ALOGI("new connection\n"); + for (;;) { + unsigned short count; + if (readx(s, &count, sizeof(count))) { + ALOGE("failed to read size\n"); + break; + } + if ((count < 1) || (count >= BUFFER_MAX)) { + ALOGE("invalid size %d\n", count); + break; + } + if (readx(s, buf, count)) { + ALOGE("failed to read command\n"); + break; + } + buf[count] = 0; + if (selinux_enabled && selinux_status_updated() > 0) { + selinux_android_seapp_context_reload(); + } + if (execute(s, buf)) break; + } + ALOGI("closing connection\n"); + close(s); + } + + return 0; +} |