| /* |
| ** 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 <inttypes.h> |
| #include <sys/capability.h> |
| #include "installd.h" |
| #include <cutils/sched_policy.h> |
| #include <diskusage/dirsize.h> |
| #include <selinux/android.h> |
| #include <system/thread_defs.h> |
| |
| /* 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_array_t android_system_dirs; |
| |
| int install(const char *pkgname, uid_t uid, gid_t gid, const char *seinfo) |
| { |
| char pkgdir[PKG_PATH_MAX]; |
| char libsymlink[PKG_PATH_MAX]; |
| char applibdir[PKG_PATH_MAX]; |
| struct stat libStat; |
| |
| if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) { |
| ALOGE("invalid uid/gid: %d %d\n", uid, gid); |
| return -1; |
| } |
| |
| if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) { |
| ALOGE("cannot create package path\n"); |
| return -1; |
| } |
| |
| if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, 0)) { |
| ALOGE("cannot create package lib symlink origin path\n"); |
| return -1; |
| } |
| |
| if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) { |
| ALOGE("cannot create package lib symlink dest path\n"); |
| return -1; |
| } |
| |
| 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 (lstat(libsymlink, &libStat) < 0) { |
| if (errno != ENOENT) { |
| ALOGE("couldn't stat lib dir: %s\n", strerror(errno)); |
| return -1; |
| } |
| } else { |
| if (S_ISDIR(libStat.st_mode)) { |
| if (delete_dir_contents(libsymlink, 1, NULL) < 0) { |
| ALOGE("couldn't delete lib directory during install for: %s", libsymlink); |
| return -1; |
| } |
| } else if (S_ISLNK(libStat.st_mode)) { |
| if (unlink(libsymlink) < 0) { |
| ALOGE("couldn't unlink lib directory during install for: %s", libsymlink); |
| return -1; |
| } |
| } |
| } |
| |
| if (selinux_android_setfilecon(pkgdir, pkgname, seinfo, uid) < 0) { |
| ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno)); |
| unlink(libsymlink); |
| unlink(pkgdir); |
| return -errno; |
| } |
| |
| if (symlink(applibdir, libsymlink) < 0) { |
| ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, applibdir, |
| strerror(errno)); |
| unlink(pkgdir); |
| return -1; |
| } |
| |
| if (chown(pkgdir, uid, gid) < 0) { |
| ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno)); |
| unlink(libsymlink); |
| unlink(pkgdir); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int uninstall(const char *pkgname, userid_t userid) |
| { |
| char pkgdir[PKG_PATH_MAX]; |
| |
| if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid)) |
| return -1; |
| |
| 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 *pkgname, uid_t uid, gid_t gid) |
| { |
| char pkgdir[PKG_PATH_MAX]; |
| struct stat s; |
| int rc = 0; |
| |
| if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) { |
| ALOGE("invalid uid/gid: %d %d\n", uid, gid); |
| return -1; |
| } |
| |
| if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) { |
| ALOGE("cannot create package path\n"); |
| return -1; |
| } |
| |
| 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 *pkgname, userid_t userid) |
| { |
| char pkgdir[PKG_PATH_MAX]; |
| |
| if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid)) |
| return -1; |
| |
| return delete_dir_contents(pkgdir, 0, NULL); |
| } |
| |
| int make_user_data(const char *pkgname, uid_t uid, userid_t userid, const char* seinfo) |
| { |
| char pkgdir[PKG_PATH_MAX]; |
| char applibdir[PKG_PATH_MAX]; |
| char libsymlink[PKG_PATH_MAX]; |
| struct stat libStat; |
| |
| // Create the data dir for the package |
| if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid)) { |
| return -1; |
| } |
| if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userid)) { |
| ALOGE("cannot create package lib symlink origin path\n"); |
| return -1; |
| } |
| if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) { |
| ALOGE("cannot create package lib symlink dest path\n"); |
| return -1; |
| } |
| |
| 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 (lstat(libsymlink, &libStat) < 0) { |
| if (errno != ENOENT) { |
| ALOGE("couldn't stat lib dir for non-primary: %s\n", strerror(errno)); |
| unlink(pkgdir); |
| return -1; |
| } |
| } else { |
| if (S_ISDIR(libStat.st_mode)) { |
| if (delete_dir_contents(libsymlink, 1, NULL) < 0) { |
| ALOGE("couldn't delete lib directory during install for non-primary: %s", |
| libsymlink); |
| unlink(pkgdir); |
| return -1; |
| } |
| } else if (S_ISLNK(libStat.st_mode)) { |
| if (unlink(libsymlink) < 0) { |
| ALOGE("couldn't unlink lib directory during install for non-primary: %s", |
| libsymlink); |
| unlink(pkgdir); |
| return -1; |
| } |
| } |
| } |
| |
| if (selinux_android_setfilecon(pkgdir, pkgname, seinfo, uid) < 0) { |
| ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno)); |
| unlink(libsymlink); |
| unlink(pkgdir); |
| return -errno; |
| } |
| |
| if (symlink(applibdir, libsymlink) < 0) { |
| ALOGE("couldn't symlink directory for non-primary '%s' -> '%s': %s\n", libsymlink, |
| applibdir, strerror(errno)); |
| unlink(pkgdir); |
| return -1; |
| } |
| |
| if (chown(pkgdir, uid, uid) < 0) { |
| ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno)); |
| unlink(libsymlink); |
| unlink(pkgdir); |
| return -errno; |
| } |
| |
| return 0; |
| } |
| |
| int make_user_config(userid_t userid) |
| { |
| if (ensure_config_user_dirs(userid) == -1) { |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int delete_user(userid_t userid) |
| { |
| int status = 0; |
| |
| char data_path[PKG_PATH_MAX]; |
| if ((create_user_path(data_path, userid) != 0) |
| || (delete_dir_contents(data_path, 1, NULL) != 0)) { |
| status = -1; |
| } |
| |
| char media_path[PATH_MAX]; |
| if ((create_user_media_path(media_path, userid) != 0) |
| || (delete_dir_contents(media_path, 1, NULL) != 0)) { |
| status = -1; |
| } |
| |
| 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 *pkgname, userid_t userid) |
| { |
| char cachedir[PKG_PATH_MAX]; |
| |
| if (create_pkg_path(cachedir, pkgname, CACHE_DIR_POSTFIX, userid)) |
| return -1; |
| |
| /* delete contents, not the directory, no exceptions */ |
| return delete_dir_contents(cachedir, 0, NULL); |
| } |
| |
| int delete_code_cache(const char *pkgname, userid_t userid) |
| { |
| char codecachedir[PKG_PATH_MAX]; |
| struct stat s; |
| |
| if (create_pkg_path(codecachedir, pkgname, CODE_CACHE_DIR_POSTFIX, userid)) |
| return -1; |
| |
| /* 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(int64_t free_size) |
| { |
| cache_t* cache; |
| int64_t avail; |
| DIR *d; |
| struct dirent *de; |
| char tmpdir[PATH_MAX]; |
| char *dirpos; |
| |
| avail = data_disk_free(); |
| 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(); |
| |
| // Collect cache files for primary user. |
| if (create_user_path(tmpdir, 0) == 0) { |
| //ALOGI("adding cache files from %s\n", tmpdir); |
| add_cache_files(cache, tmpdir, "cache"); |
| } |
| |
| // Search for other users and add any cache files from them. |
| snprintf(tmpdir, sizeof(tmpdir), "%s%s", android_data_dir.path, |
| SECONDARY_USER_PREFIX); |
| 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(cache, free_size); |
| finish_cache_collection(cache); |
| |
| return data_disk_free() >= 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 *pkgname, userid_t 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); |
| } |
| } |
| /* 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); |
| } |
| } |
| |
| if (create_pkg_path(path, pkgname, PKG_DIR_POSTFIX, userid)) { |
| goto done; |
| } |
| |
| d = opendir(path); |
| if (d == NULL) { |
| goto done; |
| } |
| 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); |
| done: |
| *_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 void run_dexopt(int zip_fd, int odex_fd, const char* input_file_name, |
| const char* output_file_name) |
| { |
| /* platform-specific flags affecting optimization and verification */ |
| char dexopt_flags[PROPERTY_VALUE_MAX]; |
| property_get("dalvik.vm.dexopt-flags", dexopt_flags, ""); |
| ALOGV("dalvik.vm.dexopt-flags=%s\n", dexopt_flags); |
| |
| static const char* DEX_OPT_BIN = "/system/bin/dexopt"; |
| static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig |
| char zip_num[MAX_INT_LEN]; |
| char odex_num[MAX_INT_LEN]; |
| |
| sprintf(zip_num, "%d", zip_fd); |
| sprintf(odex_num, "%d", odex_fd); |
| |
| ALOGV("Running %s in=%s out=%s\n", DEX_OPT_BIN, input_file_name, output_file_name); |
| execl(DEX_OPT_BIN, DEX_OPT_BIN, "--zip", zip_num, odex_num, input_file_name, |
| dexopt_flags, (char*) NULL); |
| ALOGE("execl(%s) failed: %s\n", DEX_OPT_BIN, strerror(errno)); |
| } |
| |
| static void run_patchoat(int input_fd, int oat_fd, const char* input_file_name, |
| const char* output_file_name, const char *pkgname, 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); |
| ALOGE("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 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) |
| { |
| 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_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_flags[PROPERTY_VALUE_MAX]; |
| bool have_dex2oat_flags = property_get("dalvik.vm.dex2oat-flags", dex2oat_flags, NULL) > 0; |
| 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))); |
| |
| 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_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_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; |
| } else if (vm_safe_mode) { |
| strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=interpret-only"); |
| 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); |
| } |
| |
| ALOGV("Running %s in=%s out=%s\n", DEX2OAT_BIN, input_file_name, output_file_name); |
| |
| char* argv[7 // program name, mandatory arguments and the final NULL |
| + (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_flags ? 1 : 0) |
| + (have_dex2oat_swap_fd ? 1 : 0)]; |
| int i = 0; |
| argv[i++] = (char*)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_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++] = (char*)RUNTIME_ARG; |
| argv[i++] = dex2oat_Xms_arg; |
| } |
| if (have_dex2oat_Xmx_flag) { |
| argv[i++] = (char*)RUNTIME_ARG; |
| argv[i++] = dex2oat_Xmx_arg; |
| } |
| if (have_dex2oat_compiler_filter_flag) { |
| argv[i++] = dex2oat_compiler_filter_arg; |
| } |
| if (have_dex2oat_flags) { |
| argv[i++] = dex2oat_flags; |
| } |
| if (have_dex2oat_swap_fd) { |
| argv[i++] = dex2oat_swap_fd; |
| } |
| // Do not add after dex2oat_flags, they should override others for debugging. |
| argv[i] = NULL; |
| |
| execv(DEX2OAT_BIN, (char* const *)argv); |
| ALOGE("execl(%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, only do |
| * this on a low-mem device. |
| */ |
| static bool kAlwaysProvideSwapFile = true; |
| |
| static bool ShouldUseSwapFileForDexopt() { |
| if (kAlwaysProvideSwapFile) { |
| return true; |
| } |
| |
| char low_mem_buf[PROPERTY_VALUE_MAX]; |
| property_get("ro.config.low_ram", low_mem_buf, ""); |
| return (strcmp(low_mem_buf, "true") == 0); |
| } |
| |
| int dexopt(const char *apk_path, uid_t uid, bool is_public, |
| const char *pkgname, const char *instruction_set, |
| bool vm_safe_mode, bool is_patchoat) |
| { |
| struct utimbuf ut; |
| struct stat input_stat, dex_stat; |
| char out_path[PKG_PATH_MAX]; |
| char persist_sys_dalvik_vm_lib[PROPERTY_VALUE_MAX]; |
| char swap_file_name[PKG_PATH_MAX]; |
| char *end; |
| 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)) { |
| return -1; |
| } |
| |
| /* The command to run depend on the value of persist.sys.dalvik.vm.lib */ |
| property_get("persist.sys.dalvik.vm.lib.2", persist_sys_dalvik_vm_lib, "libart.so"); |
| |
| if (is_patchoat && strncmp(persist_sys_dalvik_vm_lib, "libart", 6) != 0) { |
| /* We may only patch if we are libart */ |
| ALOGE("Patching is only supported in libart\n"); |
| return -1; |
| } |
| |
| /* Before anything else: is there a .odex file? If so, we have |
| * precompiled the apk and there is nothing to do here. |
| * |
| * We skip this if we are doing a patchoat. |
| */ |
| strcpy(out_path, apk_path); |
| end = strrchr(out_path, '.'); |
| if (end != NULL && !is_patchoat) { |
| strcpy(end, ".odex"); |
| if (stat(out_path, &dex_stat) == 0) { |
| return 0; |
| } |
| } |
| |
| if (create_cache_path(out_path, apk_path, instruction_set)) { |
| return -1; |
| } |
| |
| if (is_patchoat) { |
| /* /system/framework/whatever.jar -> /system/framework/<isa>/whatever.odex */ |
| strcpy(in_odex_path, apk_path); |
| end = strrchr(in_odex_path, '/'); |
| if (end == NULL) { |
| ALOGE("apk_path '%s' has no '/'s in it?!\n", apk_path); |
| return -1; |
| } |
| const char *apk_end = apk_path + (end - in_odex_path); // strrchr(apk_path, '/'); |
| strcpy(end + 1, instruction_set); // in_odex_path now is /system/framework/<isa>\0 |
| strcat(in_odex_path, apk_end); |
| end = strrchr(in_odex_path, '.'); |
| if (end == NULL) { |
| return -1; |
| } |
| strcpy(end + 1, "odex"); |
| input_file = in_odex_path; |
| } else { |
| input_file = apk_path; |
| } |
| |
| 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 (!is_patchoat && 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); |
| } |
| 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); |
| } |
| if (flock(out_fd, LOCK_EX | LOCK_NB) != 0) { |
| ALOGE("flock(%s) failed: %s\n", out_path, strerror(errno)); |
| exit(67); |
| } |
| |
| if (strncmp(persist_sys_dalvik_vm_lib, "libdvm", 6) == 0) { |
| run_dexopt(input_fd, out_fd, input_file, out_path); |
| } else if (strncmp(persist_sys_dalvik_vm_lib, "libart", 6) == 0) { |
| if (is_patchoat) { |
| run_patchoat(input_fd, out_fd, input_file, out_path, pkgname, instruction_set); |
| } else { |
| run_dex2oat(input_fd, out_fd, input_file, out_path, swap_fd, pkgname, |
| instruction_set, vm_safe_mode); |
| } |
| } else { |
| exit(69); /* Unexpected persist.sys.dalvik.vm.lib value */ |
| } |
| 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* pkgname, const char* asecLibDir, int userId) |
| { |
| char pkgdir[PKG_PATH_MAX]; |
| char libsymlink[PKG_PATH_MAX]; |
| struct stat s, libStat; |
| int rc = 0; |
| |
| if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userId)) { |
| ALOGE("cannot create package path\n"); |
| return -1; |
| } |
| if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userId)) { |
| ALOGE("cannot create package lib symlink origin path\n"); |
| return -1; |
| } |
| |
| 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_data(const char* pkgName, const char* seinfo, uid_t uid) |
| { |
| struct dirent *entry; |
| DIR *d; |
| struct stat s; |
| char *userdir; |
| char *primarydir; |
| char *pkgdir; |
| 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; |
| } |
| |
| if (asprintf(&primarydir, "%s%s%s", android_data_dir.path, PRIMARY_USER_PREFIX, pkgName) < 0) { |
| return -1; |
| } |
| |
| // Relabel for primary user. |
| if (selinux_android_restorecon_pkgdir(primarydir, seinfo, uid, flags) < 0) { |
| ALOGE("restorecon failed for %s: %s\n", primarydir, strerror(errno)); |
| ret |= -1; |
| } |
| |
| if (asprintf(&userdir, "%s%s", android_data_dir.path, SECONDARY_USER_PREFIX) < 0) { |
| free(primarydir); |
| return -1; |
| } |
| |
| // Relabel package directory for all secondary users. |
| d = opendir(userdir); |
| if (d == NULL) { |
| free(primarydir); |
| free(userdir); |
| 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; |
| } |
| |
| if (asprintf(&pkgdir, "%s%s/%s", userdir, user, pkgName) < 0) { |
| continue; |
| } |
| |
| if (stat(pkgdir, &s) < 0) { |
| free(pkgdir); |
| continue; |
| } |
| |
| if (selinux_android_restorecon_pkgdir(pkgdir, seinfo, uid, flags) < 0) { |
| ALOGE("restorecon failed for %s: %s\n", pkgdir, strerror(errno)); |
| ret |= -1; |
| } |
| free(pkgdir); |
| } |
| |
| closedir(d); |
| free(primarydir); |
| free(userdir); |
| return ret; |
| } |
| |
