| /* |
| ** 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 <linux/capability.h> |
| #include "installd.h" |
| #include <diskusage/dirsize.h> |
| #include <selinux/android.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) |
| { |
| 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, 0) < 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 (symlink(applibdir, libsymlink) < 0) { |
| ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, applibdir, |
| strerror(errno)); |
| unlink(pkgdir); |
| return -1; |
| } |
| |
| if (selinux_android_setfilecon(libsymlink, pkgname, AID_SYSTEM) < 0) { |
| ALOGE("cannot setfilecon dir '%s': %s\n", libsymlink, strerror(errno)); |
| unlink(libsymlink); |
| unlink(pkgdir); |
| return -1; |
| } |
| |
| if (selinux_android_setfilecon(pkgdir, pkgname, uid) < 0) { |
| ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno)); |
| unlink(libsymlink); |
| unlink(pkgdir); |
| return -errno; |
| } |
| |
| 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, uid_t persona) |
| { |
| char pkgdir[PKG_PATH_MAX]; |
| |
| if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona)) |
| return -1; |
| |
| /* 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 %lu %lu\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, uid_t persona) |
| { |
| char pkgdir[PKG_PATH_MAX]; |
| |
| if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona)) |
| return -1; |
| |
| /* delete contents, excluding "lib", but not the directory itself */ |
| return delete_dir_contents(pkgdir, 0, "lib"); |
| } |
| |
| int make_user_data(const char *pkgname, uid_t uid, uid_t persona) |
| { |
| 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, persona)) { |
| return -1; |
| } |
| if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, persona)) { |
| 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, 0) < 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 (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 (selinux_android_setfilecon(libsymlink, pkgname, AID_SYSTEM) < 0) { |
| ALOGE("cannot setfilecon dir '%s': %s\n", libsymlink, strerror(errno)); |
| unlink(libsymlink); |
| unlink(pkgdir); |
| return -errno; |
| } |
| |
| if (selinux_android_setfilecon(pkgdir, pkgname, uid) < 0) { |
| ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno)); |
| unlink(libsymlink); |
| unlink(pkgdir); |
| return -errno; |
| } |
| |
| 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 delete_persona(uid_t persona) |
| { |
| char data_path[PKG_PATH_MAX]; |
| if (create_persona_path(data_path, persona)) { |
| return -1; |
| } |
| if (delete_dir_contents(data_path, 1, NULL)) { |
| return -1; |
| } |
| |
| char media_path[PATH_MAX]; |
| if (create_persona_media_path(media_path, (userid_t) persona) == -1) { |
| return -1; |
| } |
| if (delete_dir_contents(media_path, 1, NULL) == -1) { |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int clone_persona_data(uid_t src_persona, uid_t target_persona, int copy) |
| { |
| char src_data_dir[PKG_PATH_MAX]; |
| char pkg_path[PKG_PATH_MAX]; |
| DIR *d; |
| struct dirent *de; |
| struct stat s; |
| uid_t uid; |
| |
| if (create_persona_path(src_data_dir, src_persona)) { |
| return -1; |
| } |
| |
| d = opendir(src_data_dir); |
| if (d != NULL) { |
| while ((de = readdir(d))) { |
| const char *name = de->d_name; |
| |
| if (de->d_type == DT_DIR) { |
| int subfd; |
| /* always skip "." and ".." */ |
| if (name[0] == '.') { |
| if (name[1] == 0) continue; |
| if ((name[1] == '.') && (name[2] == 0)) continue; |
| } |
| /* Create the full path to the package's data dir */ |
| create_pkg_path(pkg_path, name, PKG_DIR_POSTFIX, src_persona); |
| /* Get the file stat */ |
| if (stat(pkg_path, &s) < 0) continue; |
| /* Get the uid of the package */ |
| ALOGI("Adding datadir for uid = %lu\n", s.st_uid); |
| uid = (uid_t) s.st_uid % PER_USER_RANGE; |
| /* Create the directory for the target */ |
| make_user_data(name, uid + target_persona * PER_USER_RANGE, |
| target_persona); |
| } |
| } |
| closedir(d); |
| } |
| |
| if (ensure_media_user_dirs((userid_t) target_persona) == -1) { |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int delete_cache(const char *pkgname, uid_t persona) |
| { |
| char cachedir[PKG_PATH_MAX]; |
| |
| if (create_pkg_path(cachedir, pkgname, CACHE_DIR_POSTFIX, persona)) |
| return -1; |
| |
| /* delete contents, not the directory, no exceptions */ |
| return delete_dir_contents(cachedir, 0, 0); |
| } |
| |
| /* 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_persona_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) |
| { |
| char src_dex[PKG_PATH_MAX]; |
| char dst_dex[PKG_PATH_MAX]; |
| |
| if (validate_apk_path(src)) return -1; |
| if (validate_apk_path(dst)) return -1; |
| |
| if (create_cache_path(src_dex, src)) return -1; |
| if (create_cache_path(dst_dex, dst)) 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) |
| { |
| char dex_path[PKG_PATH_MAX]; |
| |
| if (validate_apk_path(path)) return -1; |
| if (create_cache_path(dex_path, path)) return -1; |
| |
| ALOGV("unlink %s\n", dex_path); |
| if (unlink(dex_path) < 0) { |
| ALOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno)); |
| return -1; |
| } else { |
| return 0; |
| } |
| } |
| |
| int get_size(const char *pkgname, int persona, const char *apkpath, |
| const char *fwdlock_apkpath, const char *asecpath, |
| 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)) { |
| if (stat(path, &s) == 0) { |
| codesize += stat_size(&s); |
| } |
| } |
| |
| /* add in size of any libraries */ |
| if (!create_pkg_path_in_dir(path, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) { |
| d = opendir(path); |
| 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, persona)) { |
| 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; |
| } |
| |
| |
| /* a simpler version of dexOptGenerateCacheFileName() */ |
| int create_cache_path(char path[PKG_PATH_MAX], const char *src) |
| { |
| 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(DALVIK_CACHE_POSTFIX) + 1; |
| |
| if (dstlen > PKG_PATH_MAX) { |
| return -1; |
| } |
| |
| sprintf(path,"%s%s%s", |
| DALVIK_CACHE_PREFIX, |
| src + 1, /* skip the leading / */ |
| DALVIK_CACHE_POSTFIX); |
| |
| for(tmp = path + strlen(DALVIK_CACHE_PREFIX); *tmp; tmp++) { |
| if (*tmp == '/') { |
| *tmp = '@'; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void run_dexopt(int zip_fd, int odex_fd, const char* input_file_name, |
| const char* 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); |
| |
| 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 int wait_dexopt(pid_t pid, const char* apk_path) |
| { |
| int status; |
| pid_t got_pid; |
| |
| /* |
| * Wait for the optimization process to finish. |
| */ |
| 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) { |
| ALOGV("DexInv: --- END '%s' (success) ---\n", apk_path); |
| return 0; |
| } else { |
| ALOGW("DexInv: --- END '%s' --- status=0x%04x, process failed\n", |
| apk_path, status); |
| return status; /* always nonzero */ |
| } |
| } |
| |
| int dexopt(const char *apk_path, uid_t uid, int is_public) |
| { |
| struct utimbuf ut; |
| struct stat apk_stat, dex_stat; |
| char dex_path[PKG_PATH_MAX]; |
| char dexopt_flags[PROPERTY_VALUE_MAX]; |
| char *end; |
| int res, zip_fd=-1, odex_fd=-1; |
| |
| /* Before anything else: is there a .odex file? If so, we have |
| * pre-optimized the apk and there is nothing to do here. |
| */ |
| if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) { |
| return -1; |
| } |
| |
| /* platform-specific flags affecting optimization and verification */ |
| property_get("dalvik.vm.dexopt-flags", dexopt_flags, ""); |
| |
| strcpy(dex_path, apk_path); |
| end = strrchr(dex_path, '.'); |
| if (end != NULL) { |
| strcpy(end, ".odex"); |
| if (stat(dex_path, &dex_stat) == 0) { |
| return 0; |
| } |
| } |
| |
| if (create_cache_path(dex_path, apk_path)) { |
| return -1; |
| } |
| |
| memset(&apk_stat, 0, sizeof(apk_stat)); |
| stat(apk_path, &apk_stat); |
| |
| zip_fd = open(apk_path, O_RDONLY, 0); |
| if (zip_fd < 0) { |
| ALOGE("dexopt cannot open '%s' for input\n", apk_path); |
| return -1; |
| } |
| |
| unlink(dex_path); |
| odex_fd = open(dex_path, O_RDWR | O_CREAT | O_EXCL, 0644); |
| if (odex_fd < 0) { |
| ALOGE("dexopt cannot open '%s' for output\n", dex_path); |
| goto fail; |
| } |
| if (fchmod(odex_fd, |
| S_IRUSR|S_IWUSR|S_IRGRP | |
| (is_public ? S_IROTH : 0)) < 0) { |
| ALOGE("dexopt cannot chmod '%s'\n", dex_path); |
| goto fail; |
| } |
| if (fchown(odex_fd, AID_SYSTEM, uid) < 0) { |
| ALOGE("dexopt cannot chown '%s'\n", dex_path); |
| goto fail; |
| } |
| |
| ALOGV("DexInv: --- BEGIN '%s' ---\n", apk_path); |
| |
| pid_t pid; |
| pid = fork(); |
| if (pid == 0) { |
| /* child -- drop privileges before continuing */ |
| if (setgid(uid) != 0) { |
| ALOGE("setgid(%d) failed during dexopt\n", uid); |
| exit(64); |
| } |
| if (setuid(uid) != 0) { |
| ALOGE("setuid(%d) 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 (flock(odex_fd, LOCK_EX | LOCK_NB) != 0) { |
| ALOGE("flock(%s) failed: %s\n", dex_path, strerror(errno)); |
| exit(67); |
| } |
| |
| run_dexopt(zip_fd, odex_fd, apk_path, dexopt_flags); |
| exit(68); /* only get here on exec failure */ |
| } else { |
| res = wait_dexopt(pid, apk_path); |
| if (res != 0) { |
| ALOGE("dexopt failed on '%s' res = %d\n", dex_path, res); |
| goto fail; |
| } |
| } |
| |
| ut.actime = apk_stat.st_atime; |
| ut.modtime = apk_stat.st_mtime; |
| utime(dex_path, &ut); |
| |
| close(odex_fd); |
| close(zip_fd); |
| return 0; |
| |
| fail: |
| if (odex_fd >= 0) { |
| close(odex_fd); |
| unlink(dex_path); |
| } |
| if (zip_fd >= 0) { |
| close(zip_fd); |
| } |
| return -1; |
| } |
| |
| 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, 0) < 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; |
| } |